Who was ד"ר ב' קאהן and why was his name removed from the שו"ת ויען יוסף ?

If you look back at the Luach Pupa 1943 that we published this week recently you'll see the name ד"ר ב' קאהן mentioned as a source for zmanim, since he was a בקי in Astronomy. Makes perfect sense. Not much thought went into worrying about his Doktor Rabbiner status or which kehillah he belonged to - שטטוס קוו או ארטאדאקסית - he knows his stars so he can tell us when night falls. Yet as much as we think that we're continuing our glorious European traditions we seem to be VERY self-conscious about much of what went on there! At least twice in the new edition of ויען יוסף where they quote לוח פאפא תש"ג they omit his name and the fact that he was an "אשכנזי" - i.e. a learned Yekke.  What do today's Pupeners know that their esteemed Rebbe and mentor didn't? Why was it good enough for him and not for the folks on Bedford Avenue? See the final paragraph in the attached file, starting from ולענין זמן צאת הכוכבים. So, as far as the question we ask in the title: why was his name removed from שו"ת ויען יוסף, I guess we're protecting our children???

Who was Dr. B. Kohn? see 'סימן ל for a תשובה from Rabbi Dovid Tzvi Hoffman to the good Dr. Rabbiner.

He attended the Kenessiah Gedauloh and is mentioned in the 3rd paragraph as הרב ד"ר קאהן, ראוויטש

לוח פאפא החדש

....לוח פאפא - תש"ג

I was struck by the עולם כמנהגו נוהג aspect of the calendar. שובבי"ם and all... The world is going to h*ll and they're.... never mind that. I wasn't there, I can't point fingers. But what gets an Hungarian like myself is the treyfene names and dates! In the treyfene language! Did not the תקנות of 1866 outlaw such heresy?! And what's with the 43-46 minutes after shkiah צאת הכוכבים?!

לוח פאפא תש"ג