Months ago I decided I was going to build my own underwater remotely-operated vehicle. I got sidetracked by a kitchen remodel, but since it is now complete I will have some free time to start working on my vehicle. There are some decent videos out there where others have done the same thing, some are wildly complicated and others are basically built from items out of a scrap bin. I am hoping to land somewhere in the middle.

During the bit of research I have performed, I discovered companies selling very high-end parts, the likes of which you would find on a highly funded/sponsored deep sea expedition or a government project. I didn't find a whole lot of middle ground really, either you DIY or you dump a ton of money into it.

My plan is to use PVC for my hull. I had thought about constructing it similar to the Russian Typhoon-class submarine, with two pressure hulls within an outer hull. That would allow the electrics to reside in dry compartments while I use the void space for ballast. I even found RC submarine ballast systems on eBay which would allow me to take on water and dump it remotely so I could trim it out on the fly.

The general opinion, I have discovered so far, is to make it neutrally buoyant. As much as I would like to add that ballast tank system I may need to just keep it simple for my first attempt. Tethers also seem to be an issue, adding too much weight when they get to a certain length and if you do not take steps to make them buoyant. I thought pool noodles, but learned from someone else that they become water logged and are a bad choice. Then there is power, the trend I noticed is keeping it onboard in the form of a battery pack, but I would like to keep it ashore and just add a wire to the tether so I can not have power to worry about.

So far I have an Arduino board, some old laptops, and some rivers to explore. If we had a makerspace or hackerspace nearby I would be all set. I did search, and the closest is an hour away, which is disappointing since I know I am not the only person into ridiculous projects/hobbies around here! Anyone on here into things like this?

I've been consuming the darkness that is wartime histories from the past three or four centuries and I feel like I've encountered a lot of people who had what they believed to be justifiable reasons to launch wars against other powers. There are people who thought they had divine right to a particular position of power and so would launch a war to assert that god-given right. There are people who believed in a citizen's right to have some (any) say in how their tax money gets used in government and so would fight wars over that. People would fight wars to, as John Cleese once said, "Keep China British." Many wars are started to save the honor of a country/nation. Some are started in what is claimed to be self-defense and later turns out to have been a political play instigated to end what has been a political thorn in their sides.

In all this time, I've struggled to really justify many of these wars, but some of that comes with the knowledge of what other wars have cost in terms of human carnage and suffering. For some societies in some periods, the military is one of the few vehicles to social mobility (and I think tend to think social mobility is grease that keeps a society functioning). Often these conflicts come down to one man's penis and the inability to swallow their pride to find a workable solution unless at the end of a bayonet. These conflicts also come with the winning powers taking the opportunity to rid themselves of political threats and exacting new harms on the defeated powers (which comes back around again the next time people see each other in a conflict).

So help keep me from embracing a totally pacifistic approach to war. When is a war justifiable? When it is not only morally acceptable but a moral imperative to go to war? Please point to examples throughout history where these situations have happened, if you can (though if you're prepared to admit that there has been no justifiable war that you're aware of, I suppose that's fine if bitter).

What have you been listening to this week? You don't need to do a 6000 word review if you don't want to, but please write something!

Feel free to give recs or dicuss anything about each others' listening habits.

You can make a chart if you use last.fm:

http://www.tapmusic.net/lastfm/

I've been noticing a social effect lately and I'm curious about others' takes on this. I'm calling it "specialty fatigue" because I've noticed mostly in specialty communities. I differentiate between this, elitism, FAQ annoyance because there seems to be a more complex cause at work.

To put it in general terms, specialty fatigue is caused by the overexposure to others' work in a given area of expertise. Whereas elitism is more of an ego driven personality traits, and FAQ frustration arises from repeatedly answering the same basic questions, this fatigue seems to be caused by seeing too many things that don't live up to standards (often arbitrary personal standards, but sometimes can be industry standards). In others words, people notice their industry getting flooded with novices getting away with crap they'd never tolerate. It can be disheartening and disillusioning. Most often, it results in the community of specialists becoming overly critical of things that didn't originally bother them. People who were once helpful and encouraging become raging internet monsters.

I see this happen a lot because I'm a bit of a jack of all trades, master of none, and largely autodidactic. I don't have very many strong opinions on how things should be done because I've learned to constantly question the efficacy of norms, and try to establish a system that just works best to achieve the results I care about. Despite that, I'm still interested in finding out how others go about doing things, or even just listen to the sort of stuff they care about. What factors do specialists find worthwhile in determining quality? How feasible is it for me to achieve those results?

Quite often, specialty communities are so corrupted by overexposure that many members of the community start acting as gatekeepers. "If you can't afford decent equipment, don't even bother." And they'll criticize anything that could remotely be interpreted as a newb question or point of view, frequently to the point of acute toxicity where just about any discussion becomes unfeasible.

I'm a propenent of openly sharing knowledge. But the offshoot of increased introductory material is that there will be a corresponding increase in novice level production. I can see why people might be bothered by that (personally, I'm not), but it blows me away that anyone would be surprised by that. That's exactly how it seems sometimes, though. Almost as if people just wanted to show off how much they know without anyone else using that knowledge for anything productive.

This seems like the social deflection point between "old school" methods of passing down specialty knowledge (apprenticing, higher education, family businesses) to "new school" methods (look it up online and just try it out). With the removal of a mentor figure from the equation, there is less of a filter for what's quality and what's crap. Add social media into the equation and there seems like there's a constant influx of garbage into every industry out there. But for specialty communities, it definitely has an "end of the world as we know it" kinda feel because it seems like the entire specialty is getting flooded with subpar work that is a threat to their livelyhoods.

Has anyone else noticed this sort of thing? Do you have a specialty? If so, what trends have you noticed within that field regarding apparent willingness to share information? Have you ever dropped a hobby because people seemed to take it too seriously? How do you personally feel about the balance between open sharing of information vs keeping secrets (for example, a technique a process from which you derive a substantial portion of income)?

Edit: Fixed a typo. Can and can't are a bit different. Oops.

On reddit I post the occasional AAR (after action report) for Victoria 2 on the ParadoxPlaza sub. I was just wondering if there was any interest in me posting those here as well, since vic2 is a little obscure and it's entirely possible I'm the only player here out of our active users.

Good morning!

I was listening to the CBC radio on my way to work and there was a very interesting discussion about how people choose to interpret the results of DNA tests. I did a quick search and unfortunately couldn't find the radio broadcast on CBCs site.

Points mentioned (from my memory):

• People don't look at the results of a DNA test and go "this is who I am", instead they use it to cherry-pick who they want to be
• Statically, "white" people tend to identify with a more "exotic" finding in their test
• Example used included a person that chose to identify with who they thought they would pass as; results showed Native and Celtic blood, and person went with Native because he didn't believe they physically passed for Celtic

The cultural appropriation part:

• When non-minorities, who have generally not been raised or have much interaction with the minority they are now choosing to identify with, they can skew, more specifically flatten stats. For example, for a person who's always identified as caucasian to start checking off boxes for a minority, they are potentially 1) disregarding the consequences there are to race (discrimination), and 2) pumping up the stats for minority representation.

As a visible minority myself, I just find it in poor taste. I would love to think people who find a little bit of Asian blood will go and try to discovery more of what it is to be Asian, but I would definitely roll my eyes, if you just come up to me and say "I'm 1/64th like you".

So thoughts? Has anyone done a DNA test and how did it go?