12V Low battery indicator that has minimal power draw

Question: I'm wanting to make a simple low battery indicator for 12V SLA battery - just an LED that lights when the voltage gets below a certain level. What sort of power would a circuit like this http://www.electroschematics.com/9010/12v-lead-acid-battery-low-voltage-indicator/ draw from the battery (when the battery is charged)? Is it worth considering a different circuit that uses less power?
Answer: That is exactly the wrong approach. What you want is an LED which is on when the battery is good. Even better, you want an LED which is not powered by the battery.
Using your approach, if for some reason the indicator is ignored then the LED will eventually completely discharge the battery, and with SLAs that is A Bad Thing. Granted, this can take a while. If the LED is the primary current drain, then a 5 mA LED current will waste .12 Ah per day, or about an Ah per week.
If you must do it with an LED which is on to indicate low charge, at least make the LED blink rather than be on steady. A flash rate of .2 seconds on every 2 seconds will draw 1/10 the average current as a steady LED, and will arguably be more noticeable.
Comment: I agree with you "philosophically" but I think that turning on an LED when the battery is good is worse because it will drain it for no purpose. One can usually tell a battery is good enough since what is powered is working. The blinky thing is the best option IMO.
Comment: You could probably get away with using one of the comparators in the 555 if you construct it correctly. Use a micropower voltage reference and the Control input.
Comment: Agreed about the discharge problem, but need visibility here - a normally on LED turning off won't be as noticeable as the other way around. So a separate battery powering the circuit is worth considering - how would you implement this? As the a blinking LED - would an off-the-shelf blinking LED do the trick?
Comment: @askvictor - Does your LED need to be visible in sunlight?
Comment: Nope, it's a dark room so it can be very low brightness.
Comment: @askvictor - I'd use a CMOS comparator to detect the low voltage level, and use the level to reset a CMOS version of the 555 to drive an LED with the desired blink rate and duty cycle. The comparator would need to be set up with positive feedback.
Answer: I'd be looking to make a LED blink when the battery is low.  You can reduce the current consumption dramatically with a few simple tricks.
The easiest method involves throwing a small microcontroller at the problem.
Something like one of the small PIC 16F family would work well.  The approach would be to have everything that consumes current powered OFF until it was time to grab a sample.  Because this is a simple battery dead indicator, you should be able to get away with taking a sample every few seconds.  The PIC watchdog timer is good for this sort of thing - the time period isn't accurate but it doesn't have to be.
First: you need an accurate voltage reference and a comparitor.  Some small PICs have both a decent voltage reference and comparitor while many more have only a comparitor.  You would need to choose an appropriate voltage reference to feed the comparitor.
If you are using an external voltage reference, power it from one of the PIC i/o pins.  That way, the reference isn't consuming current when not needed.
You can use another i/o pin to shift the sample voltage to add hysteresis.  What I mean by that is that you will need a voltage divider to feed the input of the comparitor,  You can use a PIC i/o pin set up as open-drain with a series resistor to shift the sample voltage down.  The i/o pin is either set as Input or as Output and Low.  The pin is never allowed to be Output and Hi.
The voltage divider that brings the battery voltage down to the proper level for the comparitor needs to be high-value resistors so a to minimize the current consumption of the divider network.  I would also add a bypass cap to the output of the voltage divider.
You will power the PIC from an extremely-low quiescent-current regulator.  You can get suitable regulators with Iq down in the low uA region.  They aren't very accurate, but they don't have to be because you are using separate accurate voltage reference.
Flashing the LED can be extremely power-frugal if you use a capacitive-discharge technique.  What you would do is to use a large-value resistor to charge up a capacitor, then use a small MOSFET to connect the bottom end of the LED to ground through the appropriate current-limit resistor.  The energy stored in the capacitor gives you a really nice bright flash of light but the average current consumption can be very low.  The trade-off is how often you flash the LED vs how bright it is.
The reason for using the MOSFET to drive the LED is that the capacitor will charge up to the battery voltage, which is significantly higher than the PIC operating voltage.
You will change your sample time to be faster if desired when the indicator is supposed to be flashing.  A single flash every second or so is probably good.
The final trick that you can do is to actually disconnect the voltage sample input from the battery if needed.  This does require a few extra parts and may not be worth the effort, especially if the battery is of a decently-large size.
Answer: AlfaZeta supplies an uncommon type of component called a flip-disc, which is a mechanical component that toggles between two indicator modes using a short pulse of current. In use, it draws no current or voltage whatsoever! For the smallest model, the 30NR (or, with a protective capm C30NR), a 1.5ms pulse of 4.5V@350mA is sufficient to toggle state.
This may seem like a large amount when your circuit is dying, but it may be stored in capacitors for later use. One potential difficulty is that these indicators carry state outside of your program, so you will want to have a default setting during power on or off. The direction of current determines the state, so it is easy to set on or off. For microcontrollers, consider using the 30ND, which has a common anode (ground) to protect your output pins from damage.
The other option is to use an led, and flash it to save current usage. I found in experimentation that the longest you should wait between flashes is approximately 5 seconds. If you've ever tried checking a smoke detector, you'll know how difficult it is to confirm flashes that are longer than 5 seconds. 3 seconds between flashes demanded very little attention to confirm. You can get current as low 0.07mA by using a bright 10ms flash every 3 seconds at 20mA.
It is possible to build your own electromechanical indicator, though it may be difficult to ensure reliable behaviour and using a motor is overkill in small circuits.


How to stop embroidery ink from spreading onto a white lab coat?

Question: I'm having the hardest time keeping my white lab coat clean without the embroidery ink fading/spreading.  Any tips?  I wash in cold water and dry on low heat.
Comment: I want to clarify: your white lab coat has colored embroidery on it, and the dye in the embroidery is bleeding out into the lab coat. Is that right?
Comment: I see there is a lab coat [embroidering service](https://www.happythreads.co.uk/blog/embroidered-lab-coat), but the website does not include any "care" advice. It might be too late now, but if I should want one, I might have a separate embroidered patch fixed on with velcro.
Comment: Hi Christy, Welcome to Lifehacks. Is there more than a single colour in the embroidery affected? Is the same thing happening to others?
Comment: Are you averse to embroidering onto a patch? Are you doing the embroidering?
Answer: You're already doing the right thing to minimise dye colour bleeding.Here are some reasons you may be having a problem.
Dye Bleeding You Cannot Control
If the color loss happens due to the following reasons, it is beyond your control:(especially if only one of the embroidery yarns colour is affected.)

Incorrect dyeing techniques or poor quality dye were used during manufacturing
The incorrect dye was used for the type of yarn (not all dyes work on all kinds of yarn)
The dye was not properly rinsed out leaving an excess of unattached dye in the yarn
The manufacturer did not use a fixative or mordant to bind the dye to the yarn

Maybe you can contact the company that provided the embroidery service to consult with them regarding some remedy. Perhaps the materials were faulty and there have been other complaints that can be tracked to that particular colour.
One source I found suggested "setting" the dye colours using salt and vinegar. Several other sources strongly discouraged the practice as ineffective and a waste of materials and effort.
Good luck.
Comment: It could be worth trying to set the dyes as you mention. Salt and vinegar are cheap and plentiful so not much of a waste if it doesn't work. Use white (clear) vinegar though.


How to implement bullet physics in libgdx

Question: I am new at game development want to know that how can I implement bullet physics in libgdx. I searched lot of things on Internet but nothing found worthy.
Comment: This question is a bit overbroad for our format.
Comment: After studying the links given by Mr. Cameron Fredman I understand the basics of bullet physics but still in dilemma that how can i implement bullet physics in 2d game built in libgdx platform. I need some kind of sample code or tutorial which help me.
Comment: @NishantAnindya I know I'm like 2 years late, but for documentating purposes: for 2D games, use Box2D, it's a lot simpler and enough for 2D physics. Let Bullet only for your 3D games.
Answer: As I mentioned in my comment above, this question is a bit overbroad, but here's the source code for the JNI bullet engine in libgdx.  And here's the wiki.  The Bullet User Manual is a pdf file located in the root of the Bullet Physics SDK, which might make a good place to start.
You'll need to add gdx-bullet.jar and gdx-bullet-natives.jar to your desktop project, and gdx-bullet.jar to your Android project. You'll also need to copy the libgdx-bullet.so files from the extensions/gdx-bullet/armeabi and armeabi-v7a folders to your Android project's libs/armeabi and armeabi-v7a folders of course.
And there's this from the google codebase:

Setting up Bullet with libgdx To use bullet physics in your project,
  you'll need to add gdx-bullet.jar to your main project. Alternatively
  you can add the gdx-bullet project to the projects of the build path
  of your main project.
For your desktop project you'll need to add the gdx-bullet-natives.jar
  to the libraries.
For your android project you'll need to copy the
  armeabi/libgdx-bullet.so and armeabi-v7a/libgdx-bullet.so files to the
  libs folder in your android project.
Bullet isn't supported for GWT at the moment.
Initializing Bullet Before you can use Bullet, you'll need to load the
  libraries. This can be done by adding the following line in your
  create method:
Bullet.init();

There's a good deal more information at the links provided above.
Comment: I'd add for anyone that finds this that Xoppa has some [great tutroials](http://blog.xoppa.com/).


How to engage students in oral presentations?

Question: Paper-based exams are not fully representative of knowledge, and it is good to consider oral presentations of students as a factor for the final grade to some extent. This is somehow the case in graduate courses, where the number of students is lesser, but how to follow this strategy for crowded classroom of inexperienced undergraduate students. I mean a classroom of 50+ size with students who do not have experience in scientific discussion!
Answer: I would like to add to earthling's answer. If you have teaching assistants, please do make good use of them in this aspect.
As a TA, I have had excellent experiences in mentoring undergraduates to prepare research presentations, final papers, projects and proposals for these papers and project. Of course, we were generally in a class of 120-160 students so that speaks to a classroom scale higher than what you are suggesting. There were 3 graduate TA's, usually and we each had about 50 students to mentor. We found that we could devote significant amounts of time to each student when we met them on a one-on-one basis. Of course, the professor also met them one-on-one and there were a couple of rounds of iteration of their final presentations - which was very, very useful for the professors, the TA's and the students. As mentioned previously, it was a time sink, but very well worth it.
Answer: I've had classes of this size where I have each student do an individual presentation. It is very time consuming but I also feel it can be very worthwhile.
If you give each student 10 minutes to present some information and you have 50 students then you will have 12-13 hours for presentations (allowing 15 minutes total per student including Q&A, changing students, etc.) If you teach in 2-hour sessions then it will consume 6-7 sessions. If you have 30-32 sessions per semester it is doable but it also removes a significant chunk of time from lecturing.
In my case, I lectured for several weeks (giving the students time to do their research and giving them the foundations they needed for their presentations) and then had the students give their presentations. Then I continued lecturing with other assessments later on. The module was not about presentation skills but I do feel that in each subject, we need to teach the students some general skills (structuring an argument, how to format text, how to research, giving a presentation, etc.) in addition to the module content.
The students ended up understanding the material quite well when judged by their presentations and I found many of them quite eager to learn how they could improve their presentation skills.
In the end, I was happy with the overall results and plan to do it again.


How to connect an extra serial port of Arduino Mega to computer?

Question: As you know Arduino Mega has 4 serial ports. I need one extra serial port besides the one which is connected to computer via usb cable. So I want to use one of the other 3 serial ports. But they are just pins. Is it possible to use any other serial port with usb to connect to PC and if so how can we do that? How can I connect those two RX TX pin to a usb for connecting to computer?
Comment: You probably want a logic-level USB-serial cable, as is commonly used with minimal Arduino circuits that lack an onboard USB interface or RS232 level translator.
Comment: Solution should look like somthing like that. If I do so, will my computer see it as it does other one like COM3 or COM4?
Comment: If you have the proper driver installed then yes, that is how a windows operating system would probably present it.
Answer: You need an FTDI cable, for example, this one from Sparkfun on each additional serial port you want to use, connected to whatever serial device you want it to talk to.
If the target serial device is the same computer you're developing code on, you'd connect the cable to an additional serial port on that computer. For OS-X, you're done. For Windows, you probably need an FTDI driver for the additional port.
The example cable has a 6-pin female connector. You'd to wire its Rx & Tx pins to your Mega's Rx1 (for instance) and Tx1 pins, and its ground to one of the Mega's ground pins.
Comment: Can I directly connect them to Arduino? The cable you refer does not have any TTL voltage converter so doesn't it harm the Arduino?
Comment: That cable is a USB <-> TTL (5v) Serial cable. The level shifting is already done for you so you can wire directly to the Arduino's UARTs. I tried it with a similar cable on my own ATMega2560. Now that I now how easy it is, I'll be using two serial ports during development from now on, to avoid constantly disonnecting my terminal (and usually forgetting :( to do it) every time I need to upload, so thanks for your question!


Brake pedal grinds and lifts back up

Question: Occasionally when I push on the brake pedal it starts to go down then suddenly feels like a grind and lifts back up as if brakes aren't engaging. Then I put more pressure and it goes down again. The first time it happened it scared the dickens out if me that the brakes had failed and I stomped on the pedal and of course jerked to a very fast stop!
This is a car I bought just as a temp car and obviously has lots of issues and I don't want to put a lot of money in but I also don't want the brakes to fail on me.  Any clues hat it might be?
It's a 2006 Buick Rendezvous.
Answer: I suspect the ABS is engaging due to a bad wheel speed sensor(s).
This will cause a sort of "grinding" noise, and will actually push the pedal back at you as the ABS pump supplies more fluid into the lines.
Does the vehicle pull to one side while braking?
Comment: No it doesn't pull. But I think you answered my question. The guy I bought it from said it has a bad wheel speed sensor but said it wouldn't cause any problems. But obviously it does! Thanks!

Brake pedal grinds and lifts back up


Potential Energy of a point charge in uniform electric field

Question: I have to determine the potential electric energy from a point charge $q$ who is in an position $r$ inside an uniform electric field $\vec{E}$.
I tried to do it by using work definite integral and then use $ V = \frac{U}{q} $, but i'm stuck because one of the integration limits is $\infty$, and the definite integral would look like:
$ qrE - qE\infty $. The problem is that i don't know if this electric field goes to infinity (honestly, i think it does not) but i can't see other way of figuring this out. The correct answer (according to the book) is $qr · E$. Thanks.
Answer: The issue is that you may not take $\infty$ as a reference point since $\vec E$ is defined everywhere, say in the $\hat i$ direction to be $\vec E(x, y, z) = E_0\hat i$. Thus, when defining a potential $V(x, y, z)$ for this field, you'll have to choose a reference point, say $\vec r_0 = (x_0, y_0, z_0)$ and determine the potential at an arbitrary point $\vec r = (x, y, z)$ as
$$
V(\vec r) = -\int_{\vec r_0}^{\vec r}d\vec s\cdot\vec E = -\int_{x_0}^xdx\,E_0 = E_0(x_0 - x).
$$
In this case, the only meaningful quantities we can talk about are potential differences $\Delta V$ or potential with respect to a fixed point $\vec r_0$.
Answer: An infinite uniform electric field would be able to release an infinite amount of energy to a charge moving through it.
To get a finite result you'd either need to allow it to move only a finite distance through the field, or the field would have to be non-uniform.


In what sense are "new-Keynesian" models "new" and in what sense are they "Keynesian"?

Question: Hopefully, the title of this question is quite descriptive. Whilst I have a broad understanding of the research agenda of macroeconomics, I don't have a very good picture of how it is divided into various schools and traditions. Is there a way to briefly summarise what exactly New Keynesian macro is and how it relates to the rest of what is going on in macroeconomics?
Comment: It's hard enough just getting the timeline right... Keynesianism -> neo-Keynesianism -> Post-Keynesianism -> New Keynesianism ... sheeesh!
Answer: In essence New-Keynesians adapt micro to macro theory. This is in contrast to new classicals which adapt macro theory to orthodox neoclassical market-clearing microfoundations. New-Keynesians adapt the rational expectations hypothesis but accept that market may fails due to wage and price stickiness and Friedman's natural rate hypothesis. The New-Keynesians, the RBC school and New Classicals focus on issues relating to aggregate supply and have been the dominating schools since the 1970's, especially the new-Keynesians have dominated the last one to two decades. On the other hand "old"-Keynesians and the orthodox monetarists mainly focused on issues relating to aggregate demand and these dominated economic thinking pre-1970's.
As an example of the differences between New-Keynesian New Classicals and the RBC school consider an increase in money: This increase will have real effect in a New-Keynesian model due to these market imperfections. In a new classical model on the other hand money will only have real effects if they are unanticipated (Lucas' Island model) while in a RBC model the increase will only feed into higher prices due to perfect clearing markets and rational expectations.
Note that it has been argued by N. Gregory Mankiw that the New-Keynesian school could just as well have been called New-Monetarist.
For an excellent reference on the different schools, what they represent and their differences see Snowdon and Vane: "Modern Macroeconomics: It's Origins, Development and Current State"
Comment: Not sure I agree with the phrasing "while in an RBC model the increase will only [...]". The New Keynesian model is an RBC model. I'd prefer to read "the simplest frictionless RBC model" or something along those lines.
Comment: I disagree: RBC models are all DSGE where business cycle fluctuations come from a real shock. As far as I remember, this is the case for NK. But as long as we agree on the content, this is just a matter of definitions.
Comment: In a NK-model both nominal and real shocks can have effects on say GDP. Nominal shocks will have effects du to market imperfections among others. In a RBC model only real shocks will have an effect on say GDP. Nominal shocks such as an increase in money will only feed into higher prices because of perfect markets.

But yes as long as we agree on the content.
Comment: No the New-Keynesian model is not a RBC model. It stems from the RBC literature but because of the market imperfections it incorporates nominal shocks can have real effects in the economy while in a RBC model only real shocks have an effect. Yes they are similar but they are from different schools and should be addressed in that way. I have actually never heard anyone refer to a NK-DSGE model as a RBC model with frictions.

One could perhaps get away with saying a DSGE model with friction and a DSGE without frictions.
Answer: (Old) Keynesian Theory is what you might get taught in undergrad. It comes from behavioral rules and features the good old IS-LM etc diagrams. It rises the Keynesian traps, situations, where the economy might be stuck in downturns of the business cycle for a long time. These situations give rise to, for example, fiscal policy.
Then came the Rational Expectation paradigm, which required a general equilibrium story which is in itself consistent. These guys believed that you can only evaluate the impact of policy if the model is robust to changes in the environment. That is, if you empirically observe a behavior rule (say, consumption), but then the environment changes, the behavioral rule might change. To the extent that we expect policy to adjust the environment, we can only predict policy outcomes if we have a model which is robust to changes in the environment (Lucas critique).
These guys dismissed the old Keynesian Theory because it was built on Behavioral rules, rather than microfundations, and proceeded to create Dynamic Stochastic General Equilibrium models (DSGE), which are supposedly internally consistent and based on micro-foundations: Empirical relationships that are always true and do not change with the environment. This DSGE framework was taken over into most parts of mainstream Economics, most importantly macroeconomics.
New Keynesian Theory is an extension of the simplest possible Real Business Cycle model (which satisfies the DSGE paradigm), which contains most importantly

market power of firms
price stickiness

It is designed to give reason for policy intervention, just as the old keynesian theory. However, the intuition and the mechanism are completely different than from the Old Keynesian Story, Cochrane has nice papers and even blog posts on the exact mechanism. It's very debated, not just because its policy implications, but also because price stickiness is again implemented as a "behavioral rule", breaking with the DSGE paradigm.
If you want to know more, you should read up on the papers or ask a more precise question, otherwise this will head nowhere.
Answer: The economics and public policy website, Crooked Timber, devoted a question entirely to that subject recently. New Old Keynesianism delineates the differences between

Old Old Keynesianism,
Old New Keynesianism,
New Old Keynesianism and
New New Keynesianism

such that "New" means "post Global Financial Crisis" and "Old" to refers to a belief that the economy can be in a long-run high unemployment equilibrium.
Comment: This starts to look ridiculous (the classification I mean). Let's hope that by the centenary of the General Theory, "stickiness" will be an economic phenomenon only, and not a "can't-let-go" naming mantra of the past.
Comment: @AlecosPapadopoulos Quite true! Although it wasn't meant to be satire, I almost laughed when I first read the article ;O)


What Christian groups do not observe or celebrate the Eucharist?

Question: Are there any groups who identify as Christian but who do not celebrate/observe the Eucharist?
Comment: By Protestant do you simply mean non catholic?
Comment: @Kris  Pretty much, as long as they self-identify as "Christian".
Comment: @kris, I'm taking the liberty to edit the question along the lines of this comment thread because it un-invalidates some of the answers.
Answer: Two significant groups at least loosely associated with Protestantism that don't observe communion are The Salvation Army and the Quakers.
The rationale for the Salvation Army's position is more fully explained here: Why does the Salvation Army not administer the sacraments of baptism and the Lord's Supper?  But the short version is that they don't observe the Lord's Supper because (1) it has been a source of division in the church, and (2) it is not required for salvation.
The rationale for Quakers focuses more on all of life being "sacramental"; see, for example, this summary from the BBC:

[Quakers] don't regard some activities as more sacred than others, nor do they believe that any particular ritual is needed to get in touch with God, so they do not believe in the sacraments practised in mainstream Christian churches. (source)

As for Messianic Jews, their practice varies on the actual denomination that they belong to.  Some tie communion closely to the annual celebration of passover, while others observe it regularly like other Protestants.
Answer: There is another group who call themselves Christian, but who eschew being identified either with any kind of Catholicism or Protestantism, and they avoid the word 'celebrate', preferring to speak of 'commemorate'. There is only a tiny percentage of their members who partake of the elements, the rest believing that this memorial event is only for them to look at.
They restrict the event to once a year, and they call it the memorial of Christ's death, a solemn event and not a celebration. The word 'Eucharist' is never used by them either and they certainly don't believe in transubstantiation. They are the Jehovah's Witnesses. Up until 1935, virtually all of them took the bread and wine at their annual memorial event. That was because they all believed themselves to be in the new covenant Christ inaugurated at the Last Supper, and that they were called to the heavenly kingdom. However, a new teaching had arisen, claiming that only 144,000 such persons would ever be in that new covenant and go to heaven. This had a direct bearing on restricting the numbers partaking of the bread and wine because those not in that tiny group were said to have an earthly hope, and were not in the new covenant. They were not entitled to partake of the emblems.
At their Washington D.C. convention on 31 May, 1935, it was announced that "anyone coming into the organization from that day on would compose an earthly class of Christians." [See their history book, 'Jehovah's Witnesses Proclaimers of God's Kingdom', pages 166-167, published 1993, also 'The Watchtower' magazine 1st & 15th of August, 1935.]
Jehovah's Witnesses claim the 'other sheep' class began to be gathered particularly from 1935 onwards. They also believed that the 'little flock' class had almost reached its numeric limit of 144,000 members shortly after then. All Jehovah's Witnesses claiming to be part of the little flock said they were convinced they would go to heaven. In 1935, memorial attendance worldwide was 63,146, and 52,465 partook, testifying to their heavenly calling. From 1938 new members who were said to be 'other sheep' were invited to attend the memorial but not to partake. 1938 saw 73,420 attend but only 39,225 partook. That showed a drop of 13,240 claimants of the little flock in only three years.  Significant drops continued right through to 1995 - it was down to 8,645 partakers then. By 2015 it was up to 15,177.
Yet given there are more than eight and a half million members, it still remains true that only a tiny percentage of them feel entitled to partake of the bread and wine at their annual memorial event. There are thousands of congregations where not one single member partakes. There is no observance of the event by the vast majority who just pass the plate, then the cup, to the person next to them, in silence. Perhaps they would call that an 'observance' but that does not seem to be the sense of the word as you use it, in your question.
Comment: However, upon reading the comment thread, I can see that the OP wasn't just asking about Protestant groups. Carry on...
Comment: I believe Jehovah's Witnesses don't actually identify as Protestant and aren't usually counted amongst them (like Mormons) so this more-or-less makes this not an answer.
Answer: There is at least one other Protestant Christian sect that does not practice Communion, the "Late-Acts Dispensationalists" aka "Truth for Today Christians" or Bullingerites.  Somewhat related, are the "Mid-Acts Dispensationalists" aka "Bereans", who also don't practice water baptism.  Regards both groups, all of their beliefs/exegetics are available online.
Comment: I have recently left a conservative Baptist church where some members were beginning to suggest that the institution of the Lord's Supper at His last Passover was only for the Jews.  This has, in my opinion, grown from a highly dispensationalist theology.  Tangential but closely related is the notion that, for gentiles, Paul's teaching has supremacy.


QGIS Layer Attribute Table Field Calculator Default Values

Question: QGIS 2.18.9
In a large project, I have more than 50 layers to which I want to add a new real number field.  The default values which are displayed in Field Calculator for field type, size and precision are Integer, 10 and 0 respectively.  To change these for each individual layer, I seem to have to enter Decimal Number, 6 and 2 every time which is very time-consuming. Is there a way I can change the default values?
Answer: You can use Add field to attributes table tool either in patch process or using python pyqgis. The following small code will add a new field of Type real, length of 6, and precision of 2:
import processing
layers = qgis.utils.iface.legendInterface().layers()
for layer in layers:
    processing.runalg('qgis:addfieldtoattributestable', layer, "TestField",1,6,2, r"C:\Path\To\Output\Folder\\"+layer.name())

First load all the shapefiles that you want to add a new field for them in QGIS using add feature
Click on Open Python Console from the Plugins toolbar
Click on Show editor, as shown below:

Paste the above code, but before running the code, you need to
change the following:

Replace "TestField" with a new field name
Define the output path for the newly created shapefile


what is this card game called?

Question: It's a game for 4 players. It has a board similar to Crib, but shaped differently. Each player has 4 pegs that start off the board.
You deal cards to each player. You can get your peg into play if you get an A, 2, or J. You then try to move the pegs around the board to get them safetly into your house. Other players try to land on your peg to knock them off the board.
If you get a K, you can kill someone else's peg by putting your peg there. Once you safetly get your pegs into your house, you are the partner of the player kitty corner to you. The team that gets all 8 pegs safely into their houses win.
What is this  game called?
Answer: You seem to describe the game Dog: 2 vs 2 parcheesi with cards instead of dice.

what is this card game called?


Why are 다이 and 쓰메끼리 unprofessional?

Question: My friend told me that 다이 (podium) and 쓰메끼리 (nail clippers) are not appropriate for use in a professional setting and that I should use the words 받침 and 손톱깎이 instead. What is unprofessional about these words? Is it because they are derived from Japanese? Other words like 담배 which come from Japanese are okay, I think.
Comment: Because I don't know what they mean?
Answer: Good afternoon!
다이 and 쓰메끼리 are not standard words (which are in a dictionary) so we avoid using them. As you already mentioned, they are actually not Korean but Japanese vocabularies. If there were no Korean words for them then they would be able to become standard words (maybe), but there are already good Korean words for them so there is no reason for using those words. (받침 for 다이, 손톱깎이 for 쓰메끼리) Same goes to 벤또 which is a Japanese version of 도시락.
On the other hand, the word 담배 is not from Japanese but from Portuguese, Spanish and English (Tabaco and Tobacco). Not exactly like this, but something like Tabaco -> Tambaco -> Dambaco -> Damba -> Dambae(담배). It's true that Tabaco and Tobacco entered Japan and then came to Korea, but it does not mean 담배 is a Japanese vocabulary. Similar example is 빵(bread), which originated from a Portuguese vocabulary pão.
I'm not saying that using Portuguese is okay and Japanese isn't. The difference between 담배 and 쓰메끼리 is that 담배 has been well integrated into Korean language during several hundred years, but 쓰메끼리 has very short history. When there are newly introduced vocabularies from foreign languages, trying to keep original Korean vocabularies will make sense. It applies to not only vocabularies from Japanese but also from any other languages, like 스크린 도어(screen door) became 안전문.
Answer: 다이 だい[台] and 쓰메끼리 つめきり[つめ切り·爪切(り)] were Japanese words that were borrowed when Japan ruled Korea from 1910 to 1945. Koreans made a lot of efforts to replace Japanese-origin words with Korean words.
There are more words such as 벤또 (도시락, lunchbox), 가라 (가짜, fake), 뼁끼 (페인트, paint) as indicated in the linked article.
As there are Korean words for all of them, it is not appropriate to use them in formal context unless you want to make a joke. A word like 빵 (パン, bread) and 담배 (タバコ pronounced as 타바꼬) came from Japanese, but they were originally Portuguese.
Answer: There are two main reasons.
First of all, 담배 or 빵 have been being used for more than a hundred year. Now it is considered a Korean word perfectly. In contrast, words like 쓰메끼리(손톱깎이), 다마네기(양파),  다이(받침) were imported when Korea was a colony of Japan. In that era, Japanese government probihited using Korean language to eliminate the nationality of Koreans. After independence, therefore Korean government tried to remove influence of Japanese language.
The other reason is, young people doesn't understand those words that much anymore. Teenagers may not understand what you say and ask you back, "What is 쓰메끼리?" Only old people use those words a lot.

Why are 다이 and 쓰메끼리 unprofessional?


is the accusative used after an infinitive?

Question: the song "If I Had Words", the phrase "to make a day for you" is used and I'd like to translate it. Fari tagon or fari tago?
Answer: The tense or form of the verb doesn't matter. If the verb is transitive, the direct object should be in the accusative.
Having said that the Esperanto expression fari tagon literally means, that you fabricate or produce an object such as a day, as if you were a god making the day to rise. The English expression "to make a day" is an idiom with a different meaning: to make someone happy or be a source of satisfaction, for the rest of the day. To make someone happy is in Esperanto feliĉigi:

Bonaj infanoj gepatrojn feliĉigas (by Zamenhof)
Comment: Poems and thereby songs are hard to translate. They are full of figurative expressions and the words should have a certain rhythm. If you can provide more context, lyrics, perhaps someone can give you a more singable translation.
Comment: Thank you for a clear answer.  The  song does indicate a wish to actually create a day, with specific attributes, rather than just make someone happy.


Can I send bitcoins straight from an ATM to a vendor?

Question: I want to buy something from a vendor on who accepts bitcoins.
Is is possible to go a bitcoin ATM and purchase bitcoins sent directly to his address?
Or do I have to purchase the bitcoin and have in my wallet then sending it to the vendor.
Answer: I think it is best to transfer to a wallet you control first.
This gives you full control of the transaction you send to make payment tp the vendor. This may be important in some situations. For example:
When a vendor gives you a payment address, it may come with a condition of sending payment within a certain amount of time (1 hour, for example). If you buy from an ATM, the ATM operator may only send a transaction to pay all customers once every couple of hours. So if you try to pay the vendor directly from the ATM, the vendor's payment page might time out by the time the payment is confirmed. In that case, you'd probably have to contact their customer service to resolve your order.


Magento 2 How to add extra validation to check out address form?

Question: I want to add a validation to the address form in checkout step to ensure the address input is alphanumeric and ensure the input phone number is numeric. How to add the validation? Thanks
Answer: Magento is manage input fields validation using Html class and UI component.
From checkout_index_index.xml layout file, magento is manage checkout  shipping address fields validation,here magento define class for  your input fields.
So if we change class at here then it will working.
For example telephone field, If you want to add validation of  numeric.
then you need add below code:
<item name="validation" xsi:type="array">
    <item name="YourClass" xsi:type="string">true</item>
</item>

So that may be like that:
<item name="telephone" xsi:type="array">
    <item name="config" xsi:type="array">
        <item name="tooltip" xsi:type="array">
            <item name="description" xsi:type="string" translate="true">For delivery questions.</item>
        </item>
    </item>

    <item name="validation" xsi:type="array">
        <item name="validate-digits" xsi:type="string">true</item>
    </item>

</item>

But for billing address,you need add your validation from class Magento\Checkout\Block\Checkout\LayoutProcessor
   'telephone' => [
            /* Add by Amit Bera */
             'validation' => [
                    'mobileInD' => true,
                ],
             /* end by Amit Bera */
                'config' => [
                /*
                    'tooltip' => [
                        'description' => 'For delivery questions.',
                    ],
                    */
                ],

You can find all validation class at Magento_Ui/web/js/lib/validation/rules.js
For telephone no,you can add validate-digit
Comment: Hi @Amit What we can do for Street Address Validation as it's not mentioned in `checkout_index_index.xml`
Comment: Thanks ,How can i restict mobile number is only start with '07' ?
Comment: This almost helped me, because i'm doing custom module checkout .. so this trick doesn't work for me. :( its still render the validate message but still go to shipping step :(
Answer: I'd suggest validating beyond alphanumeric input and check that customer addresses are valid and accurate for delivering your Magento orders. A nice way to do that is to help the user by auto filling the address based on what they type while they are at the data entry stage.
There are a number of Magento extensions which will do this job quite elegantly in the Magento Marketplace.
As an example, I am currently working on an extension for the Magento platform, that is designed to perform this task. The way it works is that, as soon as the customer starts typing an address, a list of relevant options are shown:

When the customer's address is shown in the list, they can then select it, and the form is automatically populated.
We have found that by using a service such as this, a customer can have their full address populated by only typing a small part. As a bonus, it's validated too!
I'm certainly not saying the service I'm working on is one you should use, just  worth considering. There are plenty of options available to make this stage of the checkout process more user friendly for your customers.
DISCLAIMER: I work for PCA Predict, the people behind the 'Addressy' address verification service.
Comment: Please do not paste campaign links to your website. I have removed the link


How to enable PSP 2000's USB charge setting via my PC?

Question: I received a 2nd generation PSP from my friend. He insists it works but from what I've seen, it doesn't. I've read that you have to have a certain "USB charge setting" -  but can I access that from my PC or only from the PSP?
Comment: Welcome to the ArQAde! Please take a minute to read the [about](http://gaming.stackexchange.com/about) page to learn how this site differs from a usual forum (e.g. by voting and not posting new questions as "answers" as you already learned the unpleasant way) - also, you get another shiny badge ;) We appreciate the usage of proper English (though if it's not your primary language we'll try to help you there)
Comment: I've never owned a PSP of any sort so its alot different to use then a gameboy or ds
Comment: On some motherboards you have certain USB ports that provide additional power. Regarding your question, if you are using a Windows PC, I'm pretty sure there is no "charge setting" anywhere for USB ports.
Answer: The "USB Charge" setting they refer to is a setting on the PSP itself. Go to Settings -> System Settings and there should be a USB Charge: On/Off toggle. Set that to On.
Once that's enabled, there's two other conditions you need to meet to charge the PSP over a USB connection:

It must be plugged into a USB port that provides enough power to charge from; most modern computers won't have a problem with this, as long as the computer is on.
The PSP must be in USB mode, the same as if you were transferring files to or from it.

Note that this means you can't charge it via USB and play games at the same time.
The official Sony documentation for USB charging can be found here.


If I talk to my mothers boss about the way he treats people could I get her fired?

Question: My mom is a store manager at a big dollar store corporation. She has worked there nearly 5 years and has loved it however, she recently got a new district manager. He moved her to a different store that was completely trashed and gave her no help to fix it. She has been trying her best and he has been honestly what I consider to be bullying her. He has called her in the exact words he used "useless" multiple times and it's wrong to me no one should be demeaned like that. So if I was to talk to her boss and tell him that he is seriously messing with her mental health (which she has a bad history with and I'm scared this is going to push her over) would I potentially get her fired? Is it wrong for me to say something? I honestly don't know what to do but I'm immensely worried. Please help
Comment: A country or region tag might be useful here.
Comment: "tell him that he is seriously messing with her mental health" Please do not disclose details about her mental health to her bully, or to anyone else for that matter. If you're trying to get her fired, or if you want your mother to stop talking to you for the rest of your life, there are easier ways of achieving those goals. If you really want to help her, help her by preparing her resume, and help her by encouraging her to apply to other jobs.
Comment: If the tables were turned, how would your boss interpret your mother doing this for you?  Maybe you can role-play her boss and help her practice standing up for herself instead.
Comment: It is her life, her job and her future. Not yours nor mine. So none of your business
Answer:
So if I was to talk to her boss and tell him that he is seriously messing with her mental health (which she has a bad history with and I'm scared this is going to push her over) would I potentially get her fired?

Yes, you could.
Whether she would be fired over this depends on location / culture / how much of an arse the boss is, but it certainly strikes me as something that's more likely to harm, rather than help the situation. Instead, I'd recommend talking through possible lines of enquiry your mother can take, herself, with you acting as an advisory (if that's what you both deem appropriate.)
If it were me, I'd recommend two separate angles. Firstly, she needs to ensure she's being pro-active in requesting the help that's required to get the store up and running well, and actively following those points up if that help isn't provided. Secondly, she needs to record everything (including the above requests / responses for help, and every time the boss calls her useless or something equally as demeaning.)
After a while, there's then two potential options:

Being pro-active and disciplined in creating that paper trail has lead to a better outcome, where she's more on top of the situation and is able to turn the store around - fantastic. Everyone's a winner.
Nothing has changed, her requests for help are ignored and the manager is still an arse - in which case she has a fantastic paper trail for going to HR and filing a complaint. This shouldn't be used lightly of course, but if he's treating her like dirt anyway, there's not much to lose.
Comment: If your mother is an adult, then it's up to her to communicate with her job, not family members.  You can help in other ways, as this answer points out, but the job part is up to her.  The only time you should talk to her boss is if she is not coming in and not able to communicate that herself (like in the hospital).  (This comment is US-centric.)
Comment: Agreed with @thursdaysgeek , Having a family member intervene in this way is a very 'bad look'-- it will reflect poorly on your mother and make her look incapable and unprofessional.  It may actually make the bully bolder, since it shows 'weakness'.
Comment: I agree that standing up for your relative is only a last resort and should likely not be done without permission of said relative. And it can get that relative fired. But if all else fails it is still an option, if only to show your relative that you care
Answer: Short answer:  YOU ABSOLUTELY can get her fired
Longer answer.
Say nothing, as any action you can take will only hurt your mother.
Putting on evil, bullying manager hat
If I were a bullying manager, and I was calling someone "useless", and her son came up and said something to me, I'd think even less of her.  I might fire her outright, by noting everything still trashed, and documenting that as evidence of her being useless, and firing her on the grounds of incompetence.
Worse, I might simply make her life hell until she quits.  Here's just one thing such a person might say to your mother.

are you really so weak and useless that you have to have your kid fight your battles for you?

Any problem she has I would say

"Do you need your kid to handle that for you too?"

Remember, you just told me how to get rid of her.  She's getting sick from this, so I can just play on that, then she'll quit.
So yes, it is absolutely wrong of you to say something.
If this manager is as much of a jerk as you say, said manager would absolutely use that against you mom in the ways I outlined, or worse.
This is a battle she needs to fight on her own.  You cannot help, and can only harm things.
Comment: I don't know if those examples are really needed...
Comment: @Tvde1 plenty of room for you to provide a better answer, or edit this one if you like.
Comment: "you cannot help, and can only harm things" you can absolutely help. there's so many ways to help. provide a shoulder to cry on, a listening ear (with the occasional interjection of "god, what an asshole"), maybe help comb through job sites and proofread cover letters. it's really just the one specific form of help in the question that would be bad.
Comment: @user371366 except that that has nothing to do with the question asked
Comment: Richard, neither does "you cannot help, and can only harm things"
Comment: @user371366 Correct, if you ignore all of the rest of what was posted.  Do you plan on participating on this stack at all?
Answer:
I honestly don't know what to do but I'm immensely worried.

Any issue that your mother is having is between her and her boss.  If she feels that he is being demeaning, she can and should be able to speak up for herself.  If the boss continues his behavior, she can and should escalate through the appropriate channels within her company.
You can speak with her and remind her of the options that are available to her, but at the end of the day she is the one that needs to talk to the boss and/or whomever else within the company that can help resolve her issues.  Your mother is a store manager, she should be sufficiently capable of managing her own problems without your intervention.
Answer: It may or may not get her fired but it's almost  certain to make it works and it's damn sure not going to help resolve her situaion, which is undeniably extremely unpleasant. I can sympathize, I really can - I've been there where I'd have liked nothing more than to ride in like the wrath of god and lay down some harsh words on someone mistreating loved one at work. It's a totally understandable urge - it's also one you absolutely have to fight so for pity's sake don't do this!!
This doesn't mean you can't help though - you just can't act on her behalf directly. Even a good manager wouldn't take the sort of interference you're proposing well, and nor should they - the employment relationship is between the employer and the employee.
What you can do is help and support your mother to do this on her own. Work out a plan of action with her (which may include her talking to her boss) and help her with all the preparation she'll need. If she's going to talk with them you can help her work out what she's going to say, how she should respond to any push-back etc. If she's going to send some written communication then you can help her word it, heck you can even write it yourself if you want (as long as she knows what you are writing and is happy to put her name to it) but it has to come from her. If she needs to consult with anyone outside of the business then you can (most likely) go with her and offer support. If she decides to look elsewhere you can support and encourage the job hunt.
So there's lots of things you can do to help - but talking to her boss for her is not one  of them.


Houses and Telephone #s

Question: There are 16 houses consecutively numbered 1-16. All houses have 7-digit telephone numbers, numbered consecutively, in the same order. For example, if house #3's phone number is 1111111, house #4 will be 1111112. The phone number is always divisible by the house number. House #13's phone number is also divisible by the number #17. What is the phone number that would correspond to house #17, if one was built?
Answer:
$7927937$.

Explanation:

Let the "$0$th" house have number $x$, i.e., house $i$ has number $x+i$. For each house number $i$ from $1$ to $16$, $i$ divides $x+i$, so $i$ must divide $x$. Therefore, $x$ must be a multiple of the LCM of the first $16$ positive integers, which is $720720$. Say $x=720720k$. We also know that $17$ divides $x+13=720720k+13$, so because $720720\equiv5\pmod{17}$, $0\equiv720720k+13\equiv5k+13\pmod{17}$. From here, we can quickly test small values to obtain that $k=11$ is the smallest positive integer satisfying that $17$ divides $5k+13=68$, so the $17$th house is $x+17=720720\cdot11+17=7927937$. This solution is also unique because $k\equiv11\pmod{17}$, so the next smallest possible value of $k$ is $11+17=28$, but then $x=720720\cdot28=20180160$ is $8$ digits long.
Comment: Perhaps you can say something about how at first you only know that $k\equiv 11\pmod{17}$ and that the 7-digit restriction forces you to pick $k=11$.
Answer:
 If House 1's number is $abcdefg$, House 2's number must be even, so even-numbered houses have even phone numbers, and odd-numbered ones have odd phone numbers.  Since House 5's number is odd, it can only be 5, so $g=1$.  House 16's number is $9k+7$, $16k$, $5k+1$, $7k+2$, $11k+5$, $13k+3$, $17k+3$, so it can also be written as $13*17k+3=221k+3$.  $221k+3 = 16n$  $13k+3=16n$ (mod 16)  $k=16x+1$   $abcdefg + 16 = 221(16x+1) + 3 = 3536x+224$   $3536x+224 = 11y+5$  $5x+10 = 11y$ (mod 11)  $x = 11y-2$  (mod 11)  $3536(11y-2)+224 = 38896y-6848$  $38896y-6848 = 9z+7$  $7y-6 = 9z$  $y = 9z+6$ (mod 9)  $38896(9z+6)-6848 = 350064z + 226528$  $350064z + 226528 = 7t+2$  $z + 6 = 7t$  $z = 7t+1$  (mod 7)  $350064(7t+1) + 226528 = 2450048t+576592$  It ends with 6, so $t=3 => abcdefg+17 = 7927936 + 1 = 7927937$.

Houses and Telephone #s


Reference for option pricing, binomial multi-period model using martingales and conditional expectations

Question: The title basically says it all. I am looking for a reference text on the pricing of options in a binomial multi-period model. It should be mathemathically rigorous using martingales and conditional expectations yet be self-contained as much as possible.
Answer: If you can get your hands on a physical copy of by Stochastic Calculus for Finance I: The Binomial Asset Pricing Model (Springer Finance) by S. Shreve, I strongly encourage it.
If you can't, here is an electronic document which adresses exactly the same issues in the first chapters (and a little bit more in the following).


Using my blog comments from other people in my book

Question: I'm writing a non-fiction book.  The book is based around a blog I wrote.  There were comments on the blog from family and friends, do I need to get their permission to use these comments or can I just put them in the book?  Many thanks, Kate
Comment: If they're friends and family, definitely get their permission.  If they're strangers, probably it's fine to go ahead (people publish stuff with quoted tweets all the time and blog comments are equally public), but I'm putting this in a comment instead of an answer because I'm not sure.
Comment: Seconded about getting permission from friends and family. There's more at stake here than just legal issues.
Comment: Welcome to writing.se! Take the [tour] and visit the [help] for more information. Thanks for participating and happy writing!
Comment: Does your blog have any terms of use?
Answer: If the blog does not have Terms of Service which require commenters to surrender their rights to the website owner, it doesn't matter who owns the website; it's still the commenter's intellectual property. They are choosing to have it distributed via the medium of your website, and they can revoke that permission.
Without a ToS clause, you do not have a license to distribute their IP via a different medium. If you do not or cannot get permission, you have to resort to the doctrine of Fair use.
Fair use
An attributed quote will be either fair or infringing. If it's short and part of a discussion, it's probably fair, especially if you paraphrase. If it's a short story they posted in the comments, it's probably infringing. Microfiction is complicated.
Under no circumstances can you present their content as your own, or use it for purposes other than "fair" (commentary, criticism, parody). For example, you can't use comment in your novel as either narration or direct speech.
Answer: Kate, you can assume that a certain amount of reproduction from your web site to your book is fair use. They did, after all, post them in a comment on a public place owned by you. If their writing is substantial (i.e., pages of material), however, you may want to seek permission.
Another way around this is to paraphrase their comments rather than quoting/copying their writing exactly. Depending on the focus of your book, this might work for you better. A judicious use of original quotes and paraphrasing can give people a feeling for their writing style (if that's needed), but stay within the fair use provision.


Quiet beach near Istanbul

Question: Are there are any places to have quite relax on the seaside near Istanbul (less than 100 km)? It would be nice to have place to stay for few nights in this location.
Comment: Not really. Istanbul is a huge city, with plenty of things to do. However there is not such much to do and see in the immediate surroundings. Thus a range of 100 km is not excessive.
Comment: This seems like it should be answerable to me. Istanbul is anything but quiet and Turkey's famous beach resorts are anything but quiet. So I would assume that rather than there being too many to fit in an answer that there's likely to be very few that fit the criteria. If I'm wrong though I think some minimal proof ought to be shown.
Comment: This is a bit wide of an area and asking for an opinion.  Can you clarify the criteria?
Comment: @SantaC. 100km from Istanbul you have 2 seas to consider and few hundred km of beachfront, some of which may not be in the tourist guides.  Also car is not the only mode of transport available, so as it stands the range of possible answers may be too wide.
Comment: It is not in the tourist guides because there is strictly nothing to do or to see.
Answer: There are two popular options not too far from Istanbul.

The Princes Islands (Adalar), are a 90 minutes ferry ride from the center of Istanbul. In principle the islands are quiet as there are no private motor vehicles allowed there. However, they can be crowded in July and August. In that period, it is better to avoid going there on a weekend.
On the Black Sea you can go to Kilyos (40 km from central Istanbul). You can get there by ferry and bus. It's a pleasant trip.

For more information you can have a look at the following page:
http://www.turkeytravelplanner.com/go/Istanbul/Sights/beaches.html
Comment: please comment when you downvote an answer
Comment: They have voted down because the answer is mine. On this site, votes are for persons not for answers or questions.

Quiet beach near Istanbul


Sound stopped working after update

Question: My sound stopped working after the first update came in for Elementary Loki.  The sound works fine if I boot in live mode from a jump drive.  I installed to hard drive 4/3/2017.  I've checked to make sure it's not muted in mixer.  I ran the command to make sure the sound card was recognized and it is there.  My sound card is on the mother board and is HDA Intel, Realtek ALC888.
I see several other posts but no fix.  One suggestion I saw was to add hda Intel generic to the alsa-base.conf.  That did not work for me either.
If anyone had this problem and found a fix I would greatly appreciate the info.
Comment: I had a similar issue a few months ago. In the end it was a bios update that fixed my sound issues. It was strange though because it didn't manifest until I received an elementary update.
Answer: Had same problem for last two days after update.  Installed pavucontrol and selected the external soundcard through it instead of through settings.  Worked.

Sound stopped working after update


Window 7 is crashing (ACER Laptop)

Question: I have a question regarding Windows 7 and determining the possible causes for it crashing.
I have a ACER laptop which I purchased 1 year ago with Window 7 installed on it. It has worked fine, but then I wanted a memory upgrade, I open the laptop up and just to check, I remove the installed memory modules and put them back in just to see if it would work fine if I were to put new memory.
Now after that the computer worked fine, but 1 day later, it crashes which hasn't happened every since I first used it, then I shut it down left it for a while, it works fine for a week and a half and then unexpectedly crashes again. Now the crashes are occurring randomly.
Crash definition in my case: While running it randomly goes black screen, the lED power lights go off and then turn on with the computer restarting by itself. This has happen very random, I don't play games on my computer, the computer wasn't heating up or anything, last I remember I was running MySQl DB on my computer when it crashed
I ran the memory diagnostics for windows 7 and it completed both tests and reported no problems. Also I ran my antivirus and it didn't catch any problems either.
I didn't touch anything else while I opened the computer, so what can be causing the crash? How to find the point in the operating system that causes it to crash in Windows 7?
My suspicion are that it's the RAM but how can I be absolutely sure? Is there any other test I can run to confirm this?
My apologies if I have posted this question in the wrong place or if it has improper tags.

Edit: As advised, I ran memtest86, computer 1 test, 1 pass, ran for 1 hour: no errors found in memory.
Comment: The memory could still be the issue - it might not be seated right.  As it is intermittent, it could be fine for the duration of the tests.  You could try running http://www.memtest.org/ for a day or so.
Answer: Use deox on the mem contacts.  I have seen problems with slight oxidation on contacts.  A Deox pen is very handy for such issues.

Window 7 is crashing (ACER Laptop)


Sarcastic hyperbole?

Question: Is there a word to describe an extremely exaggerated and ridiculous counter-example to the argument you want to make, that makes yours look good by contrast? e.g. "Yes, climate change is so serious that we should all stop breathing to reduce the global CO2 burden" or "I think drug companies should be free to just make chemicals at random and test them on the public". It is a combination of sarcasm and hyperbole, but I suspect there must be a precise word for the idea. Thoughts welcome. Thanks!
Answer: It doesn't quite fit your examples, but it sounds like the technique of
reductio ad absurdum:

(Latin: argument to absurdity), is a common form of argument which seeks to demonstrate that a statement is true by showing that a false, untenable, or absurd result follows from its denial, or in turn to demonstrate that a statement is false by showing that a false, untenable, or absurd result follows from its acceptance  (-- wikipedia.org)
Answer: Strawman seems like the closest term.
Comment: I think strawman fits well, but it would help your answer to post a definition and link to some citation about it.
Comment: Not really.  A strawman has no connotations either of exaggeration or of being a counter-argument.
Answer: It's just that: hyperbolic sarcasm.
Rodney St.Michael, Illuminati: Healing and Developing the Mind, p.30

Plato obviously uses hyperbolic sarcasm to show that the "lowly" islanders of the small Pacific islands are more civilized than the cruel Arthenian government—the object of Plato's mockery.
  (emphasis mine)
Answer: Old thread I know, but I came across this thread looking for a similar term.  I was looking for a verb with the meaning of "hyperbolize or exaggerate to the point of absurdity".
The word I was looking for was caricature, which can be used as a noun or a verb.

He's such a dishonest debater; he just responds to a caricature of his opponents' arguments in order to make his own position look reasonable by comparison.

-

If you want your arguments to be taken seriously, you could start by not caricaturing everyone else's positions and actually address them at face value.

Sarcastic hyperbole?


What's the legendary drop rate of Ghom?

Question: Is it close to elites? Is it worth to do Ghom repetitively? And in that case, should I do it in adventure mode or normal mode?
Answer: Most people that I'v eseen run it does it in story mode as the waypoint is right next to him.  As for drop rate, he's considered a 'boss drop' which gives more loot than elites, thus more chances at legendary items.
Most people who does this run wears a Mara's Kalideoscope which completely nullfies his poison damage.  I suppose the advantage is greater for HC players since there is zero chance of dying, even on T6 when wearing that amulet.
Whether its worth it or not is pretty subjective I'll leave that up to you to decide.
Comment: @user3064115 except he has significantly more health than elites, so I don't know how you can beat him in the same time it takes to fight an elite. On T3 he should have ~700m hp (single player) compared to elites with 100m hp. Also, finding elites is really easy imo by doing rifts. The biggest advantage is still that you can completely nullify him with mara's kalideoscope so you have 0 chance of dying.
Comment: Also I find repeatedly doing runs like Ghom or chests or whatever to be extremely boring.
Comment: Where is your source for bosses giving better loot than elites?  Every time I slay a boss or unique I never get anything.  Elites and rares always give something though.
Comment: if Ghom have even higher drop chance than Elites, I feel it's really efficient to farm legendaries with Ghom rush then. Since it requires some extra time to find elites, and normally in T3 or lower, I can beat Ghom in same time as beat an elite . But that's just my opinion though, is there anything wrong?
Comment: I also agree with your comment about that being boring.  That's basically pre RoS tactics there and those were no fun at all.  Rifts & bounties are the way to go for not getting bored or burnt out.
Comment: @Mkalafut I'm purely saying they drop more items per kill than compared to elites, which basically equates to more chances of them being legendary. I don't think the % of legendary drop is higher though. I don't know how you never get anything, everytime I kill an act boss for a bounty he drops about twice as many items than an elite kill.  For example, most elite groups only drop 1 rare but SK typically drops 2-3 rares.
Answer: The legendary drop rate of Ghom is different depending on your difficulty level. Most people farm bosses in normal mode because of the checkpoint system. If you're looking for legendary items, you get a much higher increase while in a rift, so you might want to consider elite farming a rift instead.
I've included the % Bonus for difficulties below for you.
<code>Normal: 100% Health, 100% Damage, 0% extra gold bonus, 0% extra XP bonus

Hard: 200% Health, 130% Damage, 75% extra gold bonus, 75% extra XP bonus

Expert: 320% Health, 189% Damage, 100% extra gold bonus, 100% extra XP bonus

Doubled bounty currency rewards for Expert and all higher levels.

Master: 512% Health, 273% Damage, 200% extra gold bonus, 200% extra XP bonus

Imperial gems may drop instead of Marquise on Master and all higher levels.

Torment I: 819% Health, 396% Damage, 300% extra gold bonus, 300% extra XP bonus

Torment+ enables class Set Items at lvl 60+, and at lvl 70+ possible Key and Organ drops, plus increasing bonuses to legendary drop rates and extra bonuses to legendary drop rates in Nephalem Rifts.

Patch 2.0.5 enabled Torment-only items to drop from horadric caches earned on T1+.

Torment II: 1311% Health, 575% Damage, 400% extra gold bonus, 400% extra XP bonus

Patch 2.0.5 added a legendary drop rate bonus for horadric caches earned on Torment 2 and higher.
Torment III: 2097% Health, 833% Damage, 550% extra gold bonus, 550% extra XP bonus

Torment IV: 3355% Health, 1208% Damage, 800% extra gold bonus, 800% extra XP bonus

Torment V: 5369% Health, 1752% Damage, 1150% extra gold bonus, 1150% extra XP bonus

Torment VI: 8590% Health, 2540% Damage, 1600% extra gold bonus, 1600% extra XP bonus
</code>

What's the legendary drop rate of Ghom?


How can I repair a bed with adjustable head (manual) that is broken?

Question: I have bed with adjustable head broken. I don't know what I need to fix it, and how this part is called to buy it (I guess it  sold in Ebay?)
I have more one bed with that part that work great, So I photographed it, so it will be more understandable:
Answer: That is called channel steel or U-channel:

Channel steel is available in a wide range of thicknesses and sizes and available in different grades of steel and aluminum. It's going to be hard to find an exact match for that piece on eBay and if you get a stock piece that you have to cut and drill yourself, you may not have the right equipment on-hand to do so.
It you can take the piece off and take it to a local metal fabrication shop, they may be able to make you a replacement piece - they may not have an exact match in stock, but they may be able to fold you a custom piece. They may also be able to make a stronger piece or reinforce it where it bent. Or may even be able to straighten out your piece and spot weld reinforcements to keep it from bending again.
Comment: Agreed, you're looking at a custom replacement. Even if you could get the OEM part, it's likely to do it again. Match the dimensions of your piece but make sure you get a thicker gauge.


What can I call the abbreviated name?

Question: If my name is Mohamed Ali Ahmed Elshennawy.
And I want to abbreviate it to Mohamed Elshennawy. What should I call this new abbreviated name (for instance nickname, surname,.. Etc), to use it in the introduce yourself interview question?
Comment: English has the term "full name" to describe the former, but I am unaware of a term that specifically designates a foreshortened form consisting of exactly one personal name and one family name.  I would expect most people to find the two-name form you present as an acceptable response to a query simply for your "name", but so also might other forms be acceptable responses.
Comment: Yeah, "name".  It's common in the US and most other English-speaking areas to use something approximating your "first" and "last" names as your "name", when asked, and only use the longer version when qualified as "full name".
Comment: There is no formal definition of *name*. In many cultures, you get to call yourself what you wish. The question *What is your name?* could be answered numerous ways. In US, many people have three or four parts to their names (and maybe more) but often answer using just two elements. The version you offer is sometimes referred to as *first and last name*
Answer: Mohamed Elshennawy is your name.
Mohamed Ali Ahmed Elshennawy is your full name
If you wish to shorten it further, consider it as a moniker or nickname

a familiar name for a person (often a shortened version of a person's given name)
"Joe's mother would not use his nickname and always called him Joseph"
"Henry's nickname was Slim"

I realize that you are not really making new names. I have a very long name too. So my full name will have more than 4 words. But I say my name with two. On internet, I use my nickname NVZ.
Comment: "Nickname" would be, perhaps, "Moh" -- a shortened version of the person's first name, or some other acquired name (eg, "Speedy").   "Moniker" is more vaguely defined (and variable by context) and could even be his "full name".
Answer: You can use  alias :

used when giving the name that a person is generally known by, after giving their real name:

Malcolm Little, alias Malcolm X

(Cambridge Dictionary)
Answer: A shortened form of a name - Mick for Michael, for instance - is a hypocorism. It is also the word which describes endearments and nicknames.

What can I call the abbreviated name?


Gear selection on 6 speed box

Question: Hi I have a Peugeot 308 1.6 ehdi with a six speed manual gearbox and have noticed that when selecting first or sixth gear it does not go in smoothly it can be notchy or clunky this is quite annoying as putting it in all the other gears is fine.could this be a possible gear selector problem or if its a cable can this be adjusted, any advice would be greatly appreciated.
Answer: It could be your...
Synchronizer rings
Modern transmissions use synchronizer rings to make manual shifting possible without the need for double declutching.

Each gear has its own synchronizer ring. These rings are subject to wear. If they are in bad condition gear synchronization doesn't work well and you have trouble putting in a certain gear.
Comment: Agreed.  This is more likely.
Comment: Just a shot in the dark: Some six speed gearboxes share the same shaft for the 1st and 6th, 2nd and 5th and 3rd and 4th gear. This _could_ be a reason why first and sixth gear are affected.
Comment: It's good logic and totally sensible.
Answer: You may want to check out your clutch. When do you feel pressure on the clutch pedal? If anything you may have a small leak in your clutch lines or the master cylinder. Mine did this too, where it was hard to get it into 1st gear. Its because my clutch wasn't disengaging all the way. So I filled it up on clutch fluid (brake fluid) and bleed the clutch and it worked fine.

Gear selection on 6 speed box


Evaporative cooling in a tropical environment

Question: I am an architect and am trying to understand the effects of evaporative cooling in a humid climate for buildings. I would like to use the example of a zeer pot for my question.  I have read everywhere that evaporative cooling is not possible in a humid climate simply because humid ambient air is already approaching 100% saturation. Obviously when saturated air cannot take any more moisture - evaporation does not take place. I get that.  However if humid air is heated then the saturation decreases quite a lot. For instance I remember looking at a chart that shows if air temperature is doubled then its ability to hold moisture increases about ten fold. In a tropical climate there is a lot of sun and heating air is easy. If air were heated to increase its moisture holding capacity and then passed over an extremely porous, moist surface will cooling take place or will the whole system gain heat?  If a zeer pot for instance were placed inside a simple black metal chimney in the sun, open on the bottom and top, where humid air is heated and the heated air rises and passes over the pot will the pot cool or will it gain heat? Is there a formula (something I can understand) I can use to calculate heat gain and loss in this example? Roughly speaking is the concept of evaporative cooling possible in a humid climate if the humid air is heated?
Comment: The effect of evaporative cooling in a humid environment is best summed up as *"Not very #@~&#^"% much!"*. Lived with one of those things in New Mexico for a few years. It did a sweet and inexpensive job most of the time, but on the few even moderately humid days we did get It wasn't worth a thing.
Comment: somewhat related http://physics.stackexchange.com/questions/114869/does-uchimizu-watering-streets-in-summer-help-reduce-temperature-in-an-area
Answer: I haven't gone through this carefully, but I believe the coldest temperature that can be achieved by a zeer pot is the wet-bulb temperature, which is equal to or higher than the dew point.  Changing the temperature of saturated air changes its relative humidity, but not its dewpoint.
If you have a pot of water at the same temperature as air at 100% relative humidity, and you heat the air, I strongly suspect you will also heat the water.
It's a very interesting idea, though!
Answer: The second law of thermodynamics comes into play here, heat cannot move from a cooler to a hotter body without doing work, i.e., expending energy.  In this case the work is done by convection currents carrying the heated air away from the pot. It will definitely be more effectve in a windy spot (but out of the sunlight!) than some place with stagnant air.  Your idea of using heated air should work, think of a hair drier, since it will increase evaporation and carry the heat of vaporization away.
Here's an idea for improving the cooling of the zeer pot.  Make a small chimney with a small fire or coals at the bottom.  The hot air will rise inside the chimney.  Now make a second chimney with the zeer pot at the bottom and connect it to the heated chimney.  The rising hot air will draw the air over the pot up with it too, increasing convection and improving the cooling.  It would take some experimentation to make this work, insulating the pot from the coals is one obvious problem.


The order of Pauli matrices

Question: Is there any special reason why Pauli matrices are:
$\sigma _1=\left(
\begin{array}{cc}
 0 & 1 \\
 1 & 0 \\
\end{array}
\right)$, $\sigma _2=\left(
\begin{array}{cc}
 0 & -i \\
 i & 0 \\
\end{array}
\right)$, $\sigma _3=\left(
\begin{array}{cc}
 1 & 0 \\
 0 & -1 \\
\end{array}
\right)$
and not for example
$\sigma _1=\left(
\begin{array}{cc}
 0 & -i \\
 i & 0 \\
\end{array}
\right)$, $\sigma _2=\left(
\begin{array}{cc}
 0 & 1 \\
 1 & 0 \\
\end{array}
\right)$, $\sigma _3=\left(
\begin{array}{cc}
 1 & 0 \\
 0 & -1 \\
\end{array}
\right)$ ?
Will the reason be applicable to Gell-Mann matrices ?
Comment: The two sets do not share the same structure constants. Can you flip signs so they would?
Comment: Which one is done first, fixing the structure constant, or defining the order/index of the matrices ?
Answer: Under the convention that $1 \leftrightarrow x, 2 \leftrightarrow y, 3 \leftrightarrow z$, the ordering we have ties to the actions performed about $x, y, z$ axes.

In the context of Pauli's work, $σ_k$ represents the observable corresponding to spin along the $k^{\text{th}}$ coordinate axis in three-dimensional Euclidean space $\mathbb{R}^3$.
Also, the Bloch sphere rotations follow that $\exp(i\sigma_{k}\theta)$ rotates the sphere by $\theta/2$ about $k^{\text{th}}$ axis.

Again it is purely conventional, we might have reordered the axes themselves. What you should be wary of though, are the signs as you flip the ordering. Many algebraic properties including commutation relationships, relations to dot and cross products, structure constants in $SU(2)$ and so on may no longer hold and it is better not to change that since many QM and QFT identities look nicer under the normal convention.

Will the reason be applicable to Gell-Mann matrices ?

Same as above. There is no new physics with reordering, it is a convenient choice.
Though it may seem arbitrary to name the only two diagonal matrices as $\lambda_3$ and $\lambda_8$, notice some nice properties. For example,

$\lambda_1, \lambda_2, \lambda_3$ are just $2 \times 2$ Pauli matrices embedded in $3$ dimensions.
There are three independent $SU(2)$ subalgebras whose Casimirs mutually commute:

$\{\lambda_1, \lambda_2, \lambda_3\}$
$\{\lambda_4, \lambda_5, x\}$
$\{\lambda_6, \lambda_7, y\}$
where the $x$ and $y$ are linear combinations of $\lambda_3$ and $\lambda_8$.

This is not to say there are no other orderings yielding similar easy-to-remember niceties, but we happen to use this one more.
Answer: Your first set of $\sigma_a$ satisfies the standard angular momentum algebra,
$$[\sigma_a, \sigma_b] = 2 i \varepsilon_{a b c}\,\sigma_c .$$
Your second set (name it differently!!), $\Sigma_a: ~~ \{\Sigma_1=\sigma_2, \Sigma_2=\sigma_1,  \Sigma_3=\sigma_3\}$, satisfies an algebra with the opposite structure constants,
$$[\Sigma_a, \Sigma_b] = -2 i \varepsilon_{a b c}\,\Sigma_c .$$
To get an alternate representation of your exact first algebra, you need $s_a\equiv -\Sigma_a$,
$$[s_a, s_b] = 2 i \varepsilon_{a b c}\,s_c .$$
This amounts to a succession of two rotations (around z by π/2 and around x by π) of your axes from a
right-handed coordinate system to a likewise right-handed one;  hence a similarity transformation, equivalent to a basis change, preserving the original Lie algebra,
$$s_a= (-i\sigma_3) \sigma_a (i\sigma_3)    .$$

The order of Pauli matrices


What is the most efficient way to replace many string tokens in many files in Java?

Question: What I want to accomplish is a tool that filters my files replacing the occurrences of strings in this format <code>${some.property}</code> with a value got from a properties file (just like Maven's or Ant's file filtering feature).
My first approach was to use Ant API (copy-task) or Maven Filtering component but both include many unnecessary dependencies and my program should be lightweight. After, I searched a little in Apache Common haven't found anything yet.
Is there an efficient (and elegant) solution to my problem?
Answer: The most efficient solution is using a templating engine. There are few, widely used engines, that comes in a single jar :

freemarker
apache velocity
stringtemplate (from antlr)
Answer: If this is configuration related, I would recommend Apache Commons Configuration. It will do varaible replacement on the fly.
It has other nice features, like handling XML, properties, Apple's pList formats.
Answer: The fastest and least encumbered way to do this will be to write your own.  It shouldn't be that tough - probably take a couple of hours to write the tests and put the code together.
A suggested algorithm:
Start by loading the properties file into a Properties object.
Take an input reader (use BufferedReader if you will be reading files from a source with high latency), and grab each character, looking for a {.  If the character isn't a {, emit the character to an output stream.  If you find a {, start scanning for a }, accumulating the characters in a StringBuilder.  If you hit another {, flush the StringBuilder to the output stream and start over.  You may want to have some maximum # of characters that you allow the property key to contain.  If you hit that limit, flush the StringBuilder to the output stream.
If you find a token surrounded by {}, grab the key name and do a Properties#getProperty() call.  If you get a result, emit the result to the output stream.  If you don't get a result, do something different.
If you want to get clever, once you get the result, instead of sending the result directly to the output stream, pre-pend it to the input stream (not literally - you'd do some logic to make it work), and continue.  That way if any of the properties themselves refer to other properties, the algorithm effectively goes recursive.
If you are really going for performance, you could use a ByteBuffer instead of an input stream/writer


Getting data format error suddenly

Question: I look after a website which has news/blog section. As usual, admin can create/edit articles. It's been running fine for years but suddenly last week, I became to get an error saying "Input string was not in a correct format." when creating/editing articles. And I also get error notification email from the system as below;

Message: Error converting data type varchar to datetime.

The entry page has date fields but I use the same format I've been using and nothing has changed since the last time I created/edited articles successfully. The same files and code in the server. It suddenly started not to let me create/edit anything. Even it won't let me save articles without changing anything of the article.
It's running on ASP.Net(C#), MS SQL Server and IIS. As nothing has changed, I have no idea where to start but can this be happened?? And what would be the cause?

I don't know what exactly the culture setting was  in the Windows Server but I don't see any incorrect setting. Current correct Region, Date and Time are there. No one has accessed to the server between the dates something went wrong. The SQL server uses the different setting from the server ones but it has been like this.
The website has some sections and the news/blog section gets the error but the other section, which also uses dates, don't get an error. Obviously these different sections uses the different files. So I think the server/SQL settings are OK. But as I mentioned, the files haven't changed at all.
Any other possibilities?? Thanks for your help.
Comment: Hard to tell without code.
Comment: As code hasn't been changed and it's been running fine for years, I don't think there is something wrong with code. I am suspecting other possibilities at this stage. Thanks
Answer: Try to check if anyone has changed the culture settings on the server (on which your MS SQL Server is running). Control Panel, Region and Language.
DateTime parsing can depend on those settings if it uses the current culture on the machine.
Assumption 1:
Your asp.net application may unnecessary convert DateTime.ToString() when constructing the sql insert/update command.
Assumption 2:
It gets the string as it is and uses the session login default language and format (see SET LANGUAGE / SET FORMAT in SQL). Check if the default language/format has changed in your sql.

Getting data format error suddenly


How should I fix blemishes in a stained particle board table top?

Question: I have a table that has a particle board too. I cleaned off excess debris, sanded the board, applied a pre stain wood conditioner to it, stained it espresso and there are blemishes that are showing through...what I do? Can I sand it again and start process over? Help?
Comment: Are you referring to the texture or the color? Particle board is a porous material and not often used as a finished surface. You might have to embrace the character of it. :)
Comment: I'm speak about texture of it
Answer: It would help to know exactly what you want to accomplish because there's likely a better finishing method than stain in your situation. A good first step is a paste wood filler to smooth out the surface imperfections. You may need to shop around a bit or online, and it's helpful to decide on a finish first.
Paint is the easiest solution, any you have some flexibility with sheen and texture if you open your options to chalk and milk paint. That being said, many people don't care for painted furniture and "stain" is often a code word for wanting a clear topcoat which is problematic with paint.
Lacquer is much more common than paint for factory finishes. It's not brush friendly but you can buy it in spray cans. On its own you'll get a durable fingernail polish type of finish, while preserving the option of adding a clear lacquer topcoat.
For problem pieces a gel stain is a much better option than stain conditioner. They're thicker than conventional stains so they don't absorb unequally. The advantage for you would be the ability to apply polyurethane as a topcoat. It's also much more rag and brush friendly than lacquer.


Link to SharePoint list that contains a counter

Question: I am wondering if it is possible to create a hyperlink in SharePoint that contains a counter to the number of items in a list (more specifically the number of folders).
For example, if I had a document library named Projects that contains a folder for each individual project I am working on. Can I create a link to the library on another page that also contains a counter for the total number of folders (or files) that are present in the library.
For further clarification, let's say I have 25 folders in the Projects library that contain multiple files inside them. Can I make a link on a site page that looks like:
Project Library (25)
Thank you very much!

Nick
Answer: You might possibly consider adding a custom view to your list or library, and making use of the "Folder Child Count" field.  This will show the number of sub folders inside a folder.


Is the fat trout trailer in Twin Peaks: The Return, part 6 the same we see in Fire Walk With Me?

Question: So Deer Meadows is near Twin Peaks? I didn't know/can't remember that.
And what's the deal with the electric pole nº 6, we see it in Twin Peaks:Fire Walk With Me when Carl says he has been in places (black lodge? room above convenience store?) and we see it in the missing pieces when it shows the room above the store. So what's the connection between the pole (or that location) and the spirits from the lodge?
Answer: If you take a look at the trailer park sign in S3, you'll see it's actually called "The New Fat Trout Trailer Park".

According to the book "The Secret History of Twin Peaks", Carl Rodd was a Twin Peaks native that moved to Deer Meadow, where he opened The Fat Trout Trailer Park.
He returned to his home town sometime in 2016 and opened another trailer park bearing the same name.
The book also elaborates on the comment that he's "been places". During a nature hike near Pearl Lakes as a boy, he and his classmate Maggie Coulson (The Log Lady) mysteriously vanished. They were found the next day by Andrew Packard, believing that only an hour had passed since they had entered the woods.
Answer: To answer the question in your title, The Fat Trout from The Return Part 6 is the same Fat Trout as the one seen in FWWM.
What Carl meant by saying he has 'been places' is yet to be explained, but it does imply he has visited the black lodge or the convenience store.
To answer your further questions, the electric pole also seems to have some significance as a place of supernatural activity - if I remember correctly, the boy was hit by a truck driven by Richard Horne in The Return Part 6, and in FWWM, the one-armed man bellows at Laura and Leyland from a convertible in this same place. Perhaps it is the site of the convenience store

 as seen in episode 8?


Is there a way to directly message a user?

Question: I wanted to send @kiamlaluno a note to say congratulations on being the first user to earn a gold badge. (Voting on 600 questions? That must have taken a lot of time!). But I don't see any way to send a direct message, and I don't think meta is an appropriate place for that sort of completely OT community cheerleading. Am I missing anything? Or maybe we could have a single topic on meta just for community chitchat, using @ tags so people see it?
Answer: This is not supported, and there are no plans to that I am aware of. (There are one or more MSO requests for this).
Additionally, the <code>@</code> modifier only works in comments. Maintaining a topic on meta would not really be feasible, since a user must have participated in the actual commented item in some manner. It is also not an appropriate usage of meta.
You could just leave a comment on one of his many questions. Alternatively, there is the third place which is intended for chat.
Comment: Ah, the third place looks like the perfect solution, at least once it rolled out to our site.
Comment: @Michael: You can still use it now, but it's really hit or miss as to who is online at any time. I've tried creating a "cooking" room, but the traffic was dismally slow (non-existent). The highest trafficked rooms are the moderator chat, and "the tavern" (general chat).
Comment: Yeah, I think it will work better once we have the chat.cooking.stackexchange url.