Transient response for automatic gain control with multiple intensity thresholds for image-intensified camera
This paper describes the transient response of an automatic gain control (AGC) with multiple thresholds for intensity in an image-intensified camera. Similar examples have flown in intensified-video systems used in satellites. This paper completes the development of a stable AGC with an improved transient response over the system described in a previous work. The improved transient response uses the integrated scene brightness at various intensity thresholds.
Intensified UV Imager For Space Applications
An intensified UV imaging system covering the wavelength range 120 to 330 nm has been built and tested for space flight. A six-position fil-ter wheel divides the range into four narrow bands of interest, provides an ND1 filter for increased dynamic range, and provides a calcium fluo-ride window for maximum sensitivity and good rejection of Lyman al-pha. The optical path includes a reflective telescope, a cesium telluride image intensifier, a fiber-optic reducer, and a 380 by 488 pixel CCD sen-sor. The overall field of view is approximately 2.4° x 1.8°, with an angular spatial resolution exceeding 125 μrad. The system includes digitiz-ing electronics, associated memory, and a microprocessor-controlled AGC system. The maximum sensitivity of the system to a point source ex-ceeds 20 photons/cm2-s in the photon counting mode; with the use of the AGC and ND1 filter, the dynamic range exceeds 107.
Relationship between level of internet addiction and time management skills among nursing students.
PURPOSE
This study investigated nursing students' levels of internet addiction (IA) and time management (TM) skills.


DESIGN AND METHODS
This cross-sectional descriptive study was conducted with 400 nursing students of a university in Turkey. The data were collected using the Personal Information Form, IA Scale, and TM Inventory.


FINDINGS
The IA scale and TM inventory mean scores were 40.83 ± 14.81 and 81.34 ± 11.91, respectively. A significantly negative relationship between students' level of IA and TM skills was found (p <0.05).


PRACTICE IMPLICATIONS
The concept of effective time management should be used in interventions for promoting students' conscious internet use.