http://butsuri.homelinux.net/wiki/ 2009-11-22T03:30:36-05:00 http://butsuri.homelinux.net/wiki/ http://butsuri.homelinux.net/wiki/lib/images/favicon.ico text/html 2008-08-23T10:14:55-05:00 http://butsuri.homelinux.net/wiki/doku.php?id=astro_hw1&rev=1219500895&do=diff Lorentz Transformation Given * * * * * * Find * Solution Substitute 3,4,5,and 6 into 1 and expand => => Comparing with 2, requires => (a) => (b) => (c) rearranging (a) and (b) as => (a') => (b') and substituting (a') and (b') into the square of (c), gives => (c') simplifying (c') leads to => canceling and collecting terms yields => or, more familiarly => text/html 2008-08-23T10:14:55-05:00 http://butsuri.homelinux.net/wiki/doku.php?id=astrophysics&rev=1219500895&do=diff Astro_HW1 text/html 2008-05-31T13:04:50-05:00 http://butsuri.homelinux.net/wiki/doku.php?id=automotive&rev=1212253490&do=diff Investigation into US mobility Scooters-n-Motorcycles * First up the Kawasaki Ninja 250R with a reputed 50 mpg. * On lower end of the scale we the Honda Ruckus that claims 90 mpg. * Further comparing the cheap scoots we the Yamaha C3 that get, depending on conditions, 110 mpg. text/html 2008-08-23T09:53:18-05:00 http://butsuri.homelinux.net/wiki/doku.php?id=bashrc&rev=1219499598&do=diff This is a long and twisted tale about the bits in setting up bash to my liking. I use bash as my primary shell for managing multiple accounts as an ad-hoc system administrator and for my computational research projects which involve some really big computers. text/html 2009-09-09T18:37:56-05:00 http://butsuri.homelinux.net/wiki/doku.php?id=computer_science&rev=1252535876&do=diff Parallel Playground Most of my work has been in MPI, working from the following references; * <http://www.mpi-forum.org/docs/> * <http://www.netlib.org/utk/papers/mpi-book/mpi-book.html> * <http://beige.ucs.indiana.edu/I590/node52.html> I also find UPC an intrigueing environment in which I want to play around when I have the time; text/html 2007-02-07T09:22:56-05:00 http://butsuri.homelinux.net/wiki/doku.php?id=electronics&rev=1170858176&do=diff Non-Solid State Power Converter Use fourrier Decomposition on a pulse width modulation superimposed on a driving oscillator. By having a set of oscillators that represent the major Fourrier components it might be possible to drive a primary coil such that the net power in the driving current can be more or less continuosly varied. The secondary coil may be able to be rectified by driving an oscillator tuned to the primary coils main frequency in reverse. text/html 2009-04-08T08:24:00-05:00 http://butsuri.homelinux.net/wiki/doku.php?id=engineering&rev=1239193440&do=diff The Dripless Pour (APR 2009) Use a flared pouring rim with a shape that will maximize the acceleration of the liquid (use variational calculus) after a constriction in the neck such that the liquid leaves the rim with an appreciable velocity. The acceleration must occur from the initial pouring angle through the final pouring angle, and it needs to impart a velocity sufficient to induce laminar separation at the rim. text/html 2008-05-30T11:46:28-05:00 http://butsuri.homelinux.net/wiki/doku.php?id=entrepenurial&rev=1212162388&do=diff Remote Controlled Frisbee (January 2003) Using a line of sight remote control that is attached to the wrist of the thrower to control pitch and roll. Micro flight surface servos are operated via an onboard microprocessor and lightweight battery. Orientation is obtained by using the line of sight alignment from the operator. text/html 2008-08-23T10:14:55-05:00 http://butsuri.homelinux.net/wiki/doku.php?id=eouproposal&rev=1219500895&do=diff Proposal to EOU: A Revitalized Physics Department for a Revitalized Badgley Science Center * Intro points * EOU wants to be competitive amongst small liberal arts universities * Importance of a solid physics department to above goal * Quality of the physics department needs to go to the next level text/html 2008-08-23T10:14:55-05:00 http://butsuri.homelinux.net/wiki/doku.php?id=file_utils&rev=1219500895&do=diff fubar'ed files on ext2/3 lsattr and chattr if that doesn't work debugfs text/html 2009-11-12T08:39:48-05:00 http://butsuri.homelinux.net/wiki/doku.php?id=food&rev=1258033188&do=diff This page is a collection of food related ideas. References NCHFP appears to be a geat resource for all things regarding food preservation. Mothers Recipes Garbonzo Bean Soup Cook together the following for 2 hours 1 pkg. Garbonzos 1 tbsp garlic 1 tbsp sea-salt 1 tbsp poultry seasoning 2 tbsp sage 3 tbsp canola oil. text/html 2008-06-23T19:32:55-05:00 http://butsuri.homelinux.net/wiki/doku.php?id=gnuplot_history&rev=1214263975&do=diff set Terminal x11 set terminal exit set terminal x11 plot 1.5**x splot x**y splot [-pi:pi] [-pi:pi] x**y splot [-pi:pi] [-pi:pi] y**x splot [-3:3] [-3:3] x**y plot x**2 plot x**2.1 plot abs(x**2.1) splot [-3:3] [-3:3] abs(x**y) plot x**3 help real help complex help imaginary splot [-3:3] [-3:3] [-10:10] real(x**y) help splot ranges splot [-2:2] [-2:2] real(x**y) set zrange [-30:30] pm3d [-3:3] [-3:3] real(x**y) splot [-3:3] [-3:3] real(x**y) quit load "all.dem" load "~/all.dem" set isosampl… text/html 2008-08-23T10:14:55-05:00 http://butsuri.homelinux.net/wiki/doku.php?id=hacks&rev=1219500895&do=diff CrossWalk Hack (unconfirmed) The most popular hack, which works on most models, is the “Instant Walk.” Three short clicks, followed by two long, one short, two long, and three short; turn any crosswalk signal from “don't walk” to “walk” with a matching change in the traffic signals. text/html 2008-08-23T10:14:55-05:00 http://butsuri.homelinux.net/wiki/doku.php?id=html_color_name_space&rev=1219500895&do=diff Blatently copied from here text/html 2008-08-23T10:14:55-05:00 http://butsuri.homelinux.net/wiki/doku.php?id=inputrc&rev=1219500895&do=diff #My chages first #Shows matches after first pressing of TAB set show-all-if-ambiguous on #Use alt-s cycles through all possible matches "\M-s": menu-complete #Search in history using Up and Down keys "\e[A": history-search-backward "\e[B": history-search-forward #Note: CTRL-R searches in history #Alt-o shows previous command and position cursor between first and second word "\M-o": "\C-p\C-a\M-f " #use CTRL-f to delete content od command line #Note: Other deleting commands CTRL-k delete t… text/html 2008-08-23T10:14:55-05:00 http://butsuri.homelinux.net/wiki/doku.php?id=linux&rev=1219500895&do=diff Postscript Booklets Converting PDF files to a booklet. * First, using pdf2ps seems to modify page borders, so don't use it to generate a postscript file. Instead use xpdf, gpdf or acroread to print to a file. * For a hundred pages or less use psbook in.ps tmp.ps then mpage -2 -t -T tmp.ps > out.ps text/html 2009-10-24T08:25:32-05:00 http://butsuri.homelinux.net/wiki/doku.php?id=math&rev=1256387132&do=diff The value of Pi Conventionally speaking is defined as the number of times the diameter of a circle will fit around its circumference. This seems somewhat reasonable at first glance, but if you really consider it there is a more intuitive definition. text/html 2008-03-19T11:07:51-05:00 http://butsuri.homelinux.net/wiki/doku.php?id=mkisofw.sh&rev=1205939271&do=diff mkisofw.sh This script is based on the work of Brad Skiff and should provide everything you need to download, modify and build an iso image of the floppyfw. If you find any bugs and know how to fix them, please feel free to click 'edit' and fix the script. If you have any questions about how this works or you just want to chat, please feel free to email me, fmrose@ncsu.edu text/html 2009-07-15T09:41:27-05:00 http://butsuri.homelinux.net/wiki/doku.php?id=mpi_play_ground&rev=1247665287&do=diff MPI_Allgather Example #include <stdio.h> #include <mpi.h> /* Set run to two tasks */ #define max 2 int main (int argc, char **argv) { int i, mpi_size, mpi_rank, array[max]; /* Initialize and get relevant MPI variables */ MPI_Init (&argc, &argv); MPI_Comm_size (MPI_COMM_WORLD, &mpi_size); MPI_Comm_rank (MPI_COMM_WORLD, &mpi_rank); /* Initialize array to unique non-rank values for clarity */ for(i=0; i < max; i++) array[i]=-1; /* Have every task set its block of the array */ arra… text/html 2008-08-23T10:14:55-05:00 http://butsuri.homelinux.net/wiki/doku.php?id=muttrc&rev=1219500895&do=diff unset abort_nosubject unset abort_unmodified #set alternates=(rosef@(eou.edu|scijou.eou.edu|quark.eou.edu|nemo.physics.ncsu.edu)) set autoedit unset beep_new set delete #set dsn_notify="delay,failure" #set dsn_return='hdrs' unset edit_headers set editor='vim -c "set tw=72" +1' unset header set include=ask-no unset mark_old unset markers set menu_scroll set move=no set pager_context=2 set postpone=ask-no set recall=ask-no set reply_to=ask-no set reverse_alias set … text/html 2009-02-16T11:52:24-05:00 http://butsuri.homelinux.net/wiki/doku.php?id=notes&rev=1234803144&do=diff Bicycling From home to NCSU campus and back. Anyway, I thought I would keep a Trip Journal. Courses Active Inactive * PY 721 Statistical Physics * PY 543 Astrophysics Phun Pages Did you ever have an idea that you think should work but has absolutely no significance to anything? Well these pages are devoted to things that just make me go Hmmm! text/html 2009-09-10T09:27:46-05:00 http://butsuri.homelinux.net/wiki/doku.php?id=parallel_play_ground&rev=1252589266&do=diff MPI Calculate pi Example Monte Carlo, work in progress... #include <stdio.h> #include <math.h> #include <mpi.h> #define num_trials 10000000 #define radius 1.0 int main(int argc, char **argv) { long i; int np, rank; long Ncirc = 0; double pi, point[2]; double r2 = radius*radius; MPI_Status status; MPI_Init(&argc, &argv); MPI_Comm_size(MPI_COMM_WORLD, &np); MPI_Comm_rank(MPI_COMM_WORLD, &rank); if( rank == 0 ) { printf("cpu\n1\t2\n"); fflush(NULL); … text/html 2009-04-08T08:31:58-05:00 http://butsuri.homelinux.net/wiki/doku.php?id=physics&rev=1239193918&do=diff Toward a unified force law The ideas presented here are not intended to be taken as a unified field theory. The resulting equations are just the natural consequence of an attempt to present the gravitational force and the electromagnetic force in a similar fashion. text/html 2009-10-20T16:39:33-05:00 http://butsuri.homelinux.net/wiki/doku.php?id=political&rev=1256071173&do=diff Political Prelude A word of caution, I have never taken a course in politics, these ideas are the result of discussions and or what I think should be self evident. Throughout history there have been great human atrocities and they are often attributed to a few or even one bad person. However, most if not all of these great atrocities could not have happened without a complicit or errant hierarchy of power. Hence, a just constitution should define the structural restrictions of government in a… text/html 2009-10-07T16:12:54-05:00 http://butsuri.homelinux.net/wiki/doku.php?id=projects&rev=1254946374&do=diff Multi-touch pressure sensitive mouse pad My inspiration is based on the FTIR display being home built by many people <http://www.nuigroup.com/>, turns out it is already being prototyped <http://www.technologyreview.com/computing/22358/> :-/ * Top layer Ultra-High Molecular Weight Polyethylene (UHMW) (or similar working surface material). * Parallel wire grid with 1 cm spacing, maybe more/less - must test for acceptable resolution. * Conductive Foam (recycled electronics packaging cpu's… text/html 2008-08-23T10:14:55-05:00 http://butsuri.homelinux.net/wiki/doku.php?id=rpm_over_http&rev=1219500895&do=diff rpm --import http://freshrpms.net/packages/RPM-GPG-KEY.txt rpm -i http://ftp.freshrpms.net/pub/freshrpms/fedora/linux/3/freshrpms-release/freshrpms-release-1-1.fc.fr.noarch.rpm yum install mplayer text/html 2008-12-03T07:00:30-05:00 http://butsuri.homelinux.net/wiki/doku.php?id=sense_and_language&rev=1228305630&do=diff The written word is a visual representation of an auditory projection. The abstractions of written language allow for the description of a visual representation, ie. 'an orange ball'. As such the two senses are at least minimally close loop connected in that each can be transposed to the other. Of course there are other senses in addition to visual and auditory, foremost taste, touch and smell - amongst others such as spacial orientation(balance) or proprioception(location). For humans these oth… text/html 2009-02-16T11:52:24-05:00 http://butsuri.homelinux.net/wiki/doku.php?id=start&rev=1234803144&do=diff Bicycling From home to NCSU campus and back. Anyway, I thought I would keep a Trip Journal. Courses Active Inactive * PY 721 Statistical Physics * PY 543 Astrophysics Phun Pages Did you ever have an idea that you think should work but has absolutely no significance to anything? Well these pages are devoted to things that just make me go Hmmm! text/html 2008-08-23T10:14:55-05:00 http://butsuri.homelinux.net/wiki/doku.php?id=statistical_physics&rev=1219500895&do=diff Physics 721, HW #2 Huang 2.1 Given: Pressure is 2/3 of that at sea level. The Clapeyron equation, where is the change in volume per unit mass; Latent heat of transition for water is 40.72kJ/mole Want: Boiling point, assuming that we may treat the steam/air as an ideal gas. text/html 2008-08-22T20:04:12-05:00 http://butsuri.homelinux.net/wiki/doku.php?id=trip_journal&rev=1219449852&do=diff General Statistics The trip between home and NCSU Centennial campus is just about 15km and the map is an approximation of the route. June 16th is the second time I have made the entire trip (both in and out). However, it is the first time with my new bike gear - bicycle helmet, blink'n taillight, and a trip computer. Google Maps has a route profiler that will give you elevation, here is my route profile. text/html 2008-12-03T07:09:58-05:00 http://butsuri.homelinux.net/wiki/doku.php?id=whimsical&rev=1228306198&do=diff One liners * Nurses do it for life. (attrib. me) * 299,792,458 m/s its not just a good idea, its the law! (attrib. unknown) * Equal rights do not mean special rights. (attrib. unknown) * Laws are for the obedience of fools and the guidance of wise men. (attrib. the first lawgiver of Athens, Solon) * Get off your !@#$ cell phone and drive! (attrib. me) * You can't own Mother earth, pass it on. (attrib. mema) * The existence of religion can be adequately explained by the placebo effect. (… text/html 2007-01-08T16:36:52-05:00 http://butsuri.homelinux.net/wiki/doku.php?id=win98_under_qemu&rev=1168292212&do=diff The Problem Building a clean disk image of win98 to install to an IBM 385XD Laptop via network access. The Solution The strategy is to build an image under linux instead of the recommended method that can be found at <http://www-307.ibm.com/pc/support/site.wss/document.do?lndocid=MIGR-4E5JF3>. text/html 2008-08-23T10:14:55-05:00 http://butsuri.homelinux.net/wiki/doku.php?id=winxp_tips_and_tricks&rev=1219500895&do=diff Best Links * SP2 RC2 * Ad Aware by lavasoft * Spybot S&D * HackThis * anitvirus software from ncsu * XP firewall setup * Office XP SP3 * outlook and ie settings * blaster/ spybot 32 ---------- Backing up outlook, a tutorial and another tutorial