Berkeley CSUA MOTD:Entry 25639
Berkeley CSUA MOTD
 
WIKI | FAQ | Tech FAQ
http://csua.com/feed/
2017/11/22 [General] UID:1000 Activity:popular
11/22   

2002/8/21-22 [Science/Electric] UID:25639 Activity:moderate
8/20    Voltage answer: "Low voltage" is like 12-35v. Some people might call
        48v "low voltage". 110v or 120v, it's the same shit. It can range from
        105-130v. 220v is different though. --asked an electrician
        \_ I had always thought it was a reference to its rectifiable
           limits.
        \_ http://www.uq.net.au/~zzdonsi/standards.html
           People refer to 120V as 110V because that is the actual
           voltage; 120 is the spec but when read with a meter
           (because of the phase of the two lines to each house -
           but I wont' get into that), it's around 112, and ALWAYS
           at least 110, there are no "oftens" or "sometimes".
           \_ The electrician I spoke with said it could be as low as 105.
        \_ Is the listed voltage for AC the peak voltage or is it some kind of
           average voltage over one cycle?
2017/11/22 [General] UID:1000 Activity:popular
11/22   

You may also be interested in these entries...
2005/9/3-5 [Science/Electric, Consumer/PDA] UID:39477 Activity:moderate
9/3     I have AC adaptors for my cell phone and PDA that say the input
        should be 120VAC.  If I try to use them in Europe where the voltage
        is 220V, will I fry my PDA and cell?  Obviously, I'll have to use
        a plug adaptor to plug them in.
        \_ Yes, they will fry.  Get a transformer that goes 220V -> 110V.
           \- if you are in berkeley, you can get a little voltage and
	...
2005/3/28-30 [Science/Electric] UID:36926 Activity:low
3/28    So I'm really confused about the DC to DC, car-to-laptop power adapter.
        How come most of them are "inverter" types, where you convert from
        DC to AC, and then AC to DC? Isn't that inefficient?
        \_ Using a resistor or transistor to do DC->DC also gives power loss.
           -not an EE.
        \_ It's easier to step up/down the voltage if the current is in the
	...
2004/12/27-28 [Science/Electric] UID:35451 Activity:moderate
12/27   Anyone have experience with voltage regulators? Ie, it will
        correct under and over voltage back to 120v? I am trying to
        find one... Thanks.
        \_ Yes, they will do that. Is there anything more specific
           you wanted to knwo?
           \_ What particular ones have you used? How well does it work?
	...
2004/10/16-18 [Science/Electric] UID:34170 Activity:high
10/16   Has anyone had AC power adapters that are slightly warm even when
        it's not connected to the device that uses it? Obviously, this means
        it must be consuming energy even when it's not transforming anything,
        but why should it be?
        \_ Every AC adapter generates some heat...some much more than others.
           Inside, you have active devices that are constantly working to
	...
2003/11/6 [Science/Electric] UID:10965 Activity:nil
11/6    For AC adapters, if something says it needs 4.5V 300mA, is it all right
        to use something higher-rated, like 4.5V 500mA? Why or why not? Thanks.
        \_ The neutron flux can break down the gamma field.
           Get some ball bearings.
           \_ Good advice.  Also, don't cross the streams or there will be a
              total protonic reversal.
	...
2002/10/18 [Science/Electric] UID:26238 Activity:high
10/17   I'm going to Thailand.  Does anyone know what kind of AC plug adapter
        I need to use over there?  (I know it's 220V over there.)  Thanks.
        \_ Can't you live without your vibrator for awhile?
        \_ would you trust us even if we told you?
        \_ To be safe you should protect your equipment with an adapter made by
           Trojenz corporation.
	...
2002/7/15-17 [Science/Electric] UID:25366 Activity:high
07/15   I need to get a replacement AC adaptor for a device which
        says 7.5VDC 1.2AMPS. Will a generic AC adaptor
        that supplies 7.5V, 1000mAh (like from Fry's) work??
        \_ You meant 1000mA instead of 1000mAh?
        \_ Maybe, but you're safer if you get one 7.5V, 1200mA, or > 1200
                                      I think you mean ~, not >  _/
	...
Cache (8192 bytes)
www.uq.net.au/~zzdonsi/standards.html
Not so Obvious * Doors to buildings (offices, restaurants etc) open outwards. I must admit that it took a few trips to get it straight -- ND (Mar 2000) The uni I went to (in Aus) had a new building attached to the old building. The old building used the English system and the new one used the US system. Most tall buildings I've been in on the East Coast do have G and B on the elevator. I've never even heard of starting a basement or ground-floor at 1. More likely, it's a California thing, they're always trying to be like Europe. Only rarely will the "European" usage be followed, with the first floor one floor up. The floor closest to ground level is almost always considered one. However hotels, especially, often do funny things with this, and may well have a G (or L, for lobby) either instead of, or in addition to, the number one. I also went to a school where the "first" floor was almost fully a basement. If it is a government building, that floor may well be called number 1, for parallelism among the room numbers, where the floor is a prefix to the room. So you can find both 1-200 and B-200 for a room in the basement. You also can also see B2 (and even B3) in very large buildings with many basements. The most COMMON system is still starting with 1 and going through all the numbers. I did stay at a hotel last week which skipped 13, though, for the first time I have seen that in some time. It was mostly dropped after WW2 (the skipping of number 13). Consequently they are about 2-6 years behind the rest of the world in the time it takes to get a professional qualification. Their Year 12 is about equivalent to an Australian Year 10. The American Bachelor Degree is a 4 year general degree where the "major" accounts for only one quarter of the work and is equivalent, in many cases, to the work which Australians do in Years 11 and 12. What Australians study in professional Bachelor degrees Americans study in doctoral degrees: medicine, dentistry, vetinary science, chiropractic, law, etc. American PhD's are 3-5 years in length and include course work and substantial internships. Australian PhD's are 2-3 years in length, are purely research orientated and include little or no course work or internships. Unfortunately almost all Americans equate foreign degrees with their own on a "same-name equals same-level" basis. Most American credential evaluation businesses and academic institutions will do the same. If you need your degree or HSC properly equaluated then you must provide these people with lots of disconfirming evidence. Prior to leaving home we had heard both on a personal and professional level (I'm a teacher) that Americans are behind Australia educationally. As our boys are extremely bright and as we arrived mid year (for America) we argued very strongly that they go to the next year level up, rather than repeat. The intermediate school obliged and one son has been finding the standard of work reasonable, but challenging. Older son was not allowed to start half way through Year 11 and so is repeating the last half of Year 10, much to his disgust. From what I am seeing, though there may be some transitional and emotional effects in play, the actual work he is being asked to do is again of a very similar level/standard as at home and in some cases quite advanced. For the first time in his schooling he is not getting all "A"s. The other big difference I've noticed over here is the apparent lack of computer equipment for students. Although we have only been here a few months, it seems to me that education, within this area at least, is of a very similar standard to Australia. I guess the other factor in all this is that education over here is local and in Australia it is run at a state level. The US has a four-year High School sequence, Australia has a 6-year sequence. A US High School graduate will rarely have more than 4 years of study in the same language, and usually a lot less than that. An Australian student will have up to six years of study in the same language. There are similar examples in Mathematics and Sciences subjects. The US NCES (National Center for Educational Statistics) acknowledges that US students are about 2 years behind the rest of the developed world from about Year 7. They believe the problem is contained in the Middle School years. These years have been described by the researchers of the TIMSS as containing material which is "a mile wide and an inch deep". Because the US educational system uses the Bachelor degree to complete general education, professional education is provided in degrees labelled "Masters" and "Doctorates". Because the "PhD" is used to provide basic professional education, research work of the type done in Australian PhD degrees is undertaken in "post-doctoral research programs". Unfortunately the degree evaluators in the US do not acknowledge this difference in terminology usage. The end result is that professional programs which are accredited by Australian professional bodies for the purposes of a license to practice the profession are not recognised by US credential evaluators who insist that they are not at the right "level". The US assessors will only evaluate professional degrees which are named "Masters" or "Doctorate". All material studied in the Bachelor degree is excluded! This results in the US prescribing degrees such as a research PhD which are not professionally accredited in Australia, while proscribing those which are accredited such as professional Bachelor and Masters degrees . Currently, the only way to practise your profession in the US is to do a course of study which won't get you registered in Australia, or to do a very expensive US degree with a Masters or Doctoral name-tag, which will not be accepted in Australia as being any higher than the qualification which the US won't accept. If Australia applied the same "name" logic to American qualifications all American professionals with PhD's would be excluded from practising in Australia. Professional evaluation in the US is done, in the first instance, by commercial bodies with vested financial interests in down-grading "foreign" qualifications and, only then, by members of the profession in question. Professional licensing boards and Academic Admissions offices generally specify the use of the NACES group of credential evaluators who are affiliated with College Admissions Boards and/or provide their own "up-grade" courses . The NACES group, and the professional licensing boards are under the mistaken belief that NOOSR the Australian Government's National Office of Overseas Skills Recognition is responsible for the evaluation and accreditation of professional qualifications in Australia. NOOSR evaluates and accredits overseas qualifications only for immigration purposes and for placement in non-professional employment. The Australian professional associations are responsible for setting standards and evaluating international professional qualifications. These are the very groups which the US evaluators ignore - because they are not government bodies! They work from "offices" instead of "surgeries" because the MD, unlike the Aussie double Bachelor Medicine AND Surgery does not include training in surgery. If you need minor surgery eg a bone set, a papaloma burnt off, a piece of glass removed from your foot you have to front up to a hospital Emergency Room (ER) or wait for weeks to see a specialist. If your child is ill you have to book him in to see a Paediatrician. Like American professional training in general, medicine is a set of hyper-focused specialities obtained on the top of a very narrow general basis. You have to know a lot about your particular disorder so that you can figure out which specialist you should be seeing. Since they know very little about the rest of medicine you can sit in front of one and die of a heart-attack before they realise you are having one unless they happen to be a cardiac surgeon . According to one of the primary articles of the US National Faith the US has the best doctors and everything else in the world. The results from the last 28 years of the Australian Medical Council overse...