Arxiv rejection of preprints Following ArXiv rules I contacted with an well-known expert in thermodynamics (he is author of a known monograph) we discussed my work during several days and finally he endorsed me. When my work was ready to appear a moderator removed it, alluding to technical problems with my submission (a embedded font problem), although more latter moderators asked me personal and even economic questions! I never answer such questions and forgot the whole issue

The paper is accessible in my page at academia.edu

I have participated in an Essay Contest with another work, and it has been selected as one of the finalists. It is cited here together other three finalist essays.

I submitted this new work to ArXiV, it has been removed and I received the next response:


  Your submission has been removed upon a notice from our moderators, who 
  determined it to be inappropriate for arXiv. Please find another forum.
  
  For more information on our moderation policies see:
  
  http: //arxiv. org/help/moderation
  
  --
  arXiv moderation


ArXiv already archives several essays submitted to the same Essay contest, such as 1209.0023, 1209.1257, 1211.1917, 1210.3575

Therefore it is not a problem with the Contest or with the format. Notice that only one of above four has been selected as finalist.

According to the moderation policy I cannot ask to moderators about the details on their decision. The excuse is that "moderators are not referees", but this looks a bit childish, because it seems that they are accepting that moderators cannot sustain logically the decisions that they take about others' work.

Would I write to the advisory committee chair? Would I take some other action?

EDIT: Finally the first work rejected by Arxiv mods was published in the International Journal of Thermodynamics. I no longer care about ArXiv.
As said in the comments, the situation seems to be different for each of your papers. The font problem is understandable, but it's hard to see what you mean by "personal and even economic questions". However, if you didn't answer the questions, it's not surprising that your paper was not published in arXiv. 

Concerning the essay, I quote from the FAQ, "arXiv accepts only submissions in the form of an article that would be refereeable by a conventional publication venue.", and in particular, " This excludes [...] papers that contain inflammatory or fictitious content, papers that use highly dramatic and mis-representative titles/abstracts/introductions". I'm in no position to scientifically judge the content of your essay, but at first glance, it seems quite provocative (assumptions that are not fundamental). 

If you believe that your essay is "refereeable by a conventional publication venue", then the moderation appeal is there for this. Although the moderators do not have to motivate their decision as a reviewer would do, by bringing sufficient support that your paper meets the criteria required by arXiv (in particular by demonstrating that it doesn't fit in any of the categories listed under "inappropriate format", the fact that other essays have been published in the past is not really relevant, you would have to show the quality of your content on its own). 

In general, arXiv moderators are human moderators, and it could be the case that the rejection of your paper was a mistake. However, keep in mind that publishing in arXiv is not a granted right, and that "arXiv reserves the right to reject or reclassify any submission".