最新版はこちら。 突っ込みは各日付の BBS エントリのほか、 メール (nakano@st.seikei.ac.jp) や フォーム からどうぞ。 なおスパム除けのため、BBS 機能には 緩い認証を入れて います。 検索エンジンから来た方は、エンジンの方のキャッシュを見るか、 下の簡易検索を試してみてください。
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Namazu for hns による簡易全文検索 詳しくは 詳細指定/ヘルプを参照して下さい |
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FreeBSDで科学技術計算を行おうとした場合、まず気になるのはコンパイラの性能です。 いろいろ考えてやれば、数値演算は速くなりますが、 何も考えなければパフォーマンスが非常に悪いことになりかねません。 どうすればパフォーマンスが よくなるかをいろいろ見てみます。
The characteristics of argon electron cyclotron resonance plasma discharged by 7.0, 8.0, and 9.4 GHz microwaves were investigated. Experiments were conducted in a fixed magnetic field. It was found that the electron temperatures Te exhibited a trend of Te7.0<Te8.0<Te9.4 (suffixes represent the discharge microwave frequencies).
This article presents an add-on secondary electron energy spectrometer for scanning electron microscopes (SEMs). The add-on unit fits on to the specimen stage of a conventional SEM, and the SEM is operated as normal. As an objective lens, the add-on unit improves the SEMs spatial resolution by around a factor of 4 at a primary beam energy of 1 keV. The add-on unit functions as a multichannel open-loop voltage contrast spectrometer by employing a bandpass deflector/filter unit whose pass energy is ramped with time. The unit is designed to deflect the secondary electrons while leaving the primary beam unaffected. Initial experimental results show that significant voltage and material contrast can be obtained. In a data acquisition time of 0.32 s, a minimum detectable voltage difference of around 54 mV was obtained. Regions of copper and brass that were indistinguishable via the normal secondary electron image, were distinguished with a signal to noise ratio of around 12 by using the add-on spectrometer.
A technique for the accurate determination of the surface potential US and its evolution during irradiation, is proposed. The technique is based on detecting both backscattered (BSE) and secondary electrons (SE) in a scanning electron microscope (SEM). The (BSE + SE) spectra are measured using a compact, highly sensitive electrostatic toroidal spectrometer (ETS), specially adapted for SEM applications. The use of an ETS analyzer set in a SEM for deducing the surface potential from (SE + BSE) spectra of electron irradiated insulators is introduced here. The surface potential is determined, either from the measured maximum energy of the secondary electron peak, or from its beginning. Various dielectric materials such as MgO, Al2O3, Y2O3, mica (potassium silicate aluminum), and Teflon were studied by this technique. Experimental investigations of the beam energy and current effects on the surface potential of bare insulators are reported. The change, due to this surface potential, in some physical quantities such as the amount of BSEs and the most probable energy of their spectral distribution is also studied. The results concerning coated and grounded insulators highlight the influence of the internal electric field on the BSEs energy distribution. An account of the various benefits of using the toroidal spectrometer in the surface potential measurement is also given.
ssh (2.5.1p1-1.4) を設定しています ...や
ssh (2.5.1p1-1.5) を設定しています ...の段階で失敗していたのだが、 postinst のエラー らしい。ボロボロだな(^^;
Changes: This release includes support for the IMAP IDLE extension (RFC 2177), and additional logging of mail transfer statistics.
Changes: This is the first official non-beta release of the postfix MTA.そうだったのかー
Changes: An import fix for BSD users was made, as well as other minor fixes.
やっぱりうちの学科は「落としてない」からでしょう。 例えば一昨年は実際に 3 月に出れなかった卒研生が うちから 2 人出たわけですけど、 その次の年 (つまり去年) の卒研生の気合いの入り方は全然違いましたもの。...とかいう話をした。 「じゃあ修士も落とそうか」という話が出たかどうかは秘密。
Changes: This release is primarily a security fix release, addressing a problem which could lead to a directory listing being displayed in place of an error message. Also, it fixes some broken functionality present in the 1.3.17 release and various Win32 issues.
bftpd is a very configurable Linux FTP server which can do chroot without special configuration or directory preparation. It works on all Unix variants tested. Most FTP commands are supported, and user authentication is done via passwd/shadow or PAM. tar/gzip on-the-fly is supported.ほー
The CVS Manual Translation Project is an effort to provide translations of the CVS documentation (currently 1.10.6). The German translation has been started, and help is needed to start support for other languages. Please contact the author if you can lend a hand.
Changes: Since 5.6.0, the authentication code has been almost completely rewritten. As a result, fetchmail is now much better at detecting when it can use password-shrouding methods like CRAM-MD5 and NTLM; also, these methods now work with modern POP3 servers meeting RFC1734 as well as with IMAP servers. Experimental code for ODMR (On-Demand Mail Relay) is included.
Changes: Version 21.7 adds support for higher serial line rates and fixes a few minor problems discovered in release 21.6.1.
Changes: Procmail version 3.15.1 fixes a race condition when creating mailboxes that could result in a bounced message and increases the paranoia with which the initial environment is handled when using the -p flag. It also works around an AIX compiler bug that caused procmail to not find users' default rcfiles.
Changes: A relatively major issue was discovered with session.groups which may cause any group-expressions inside of <Limit> (DenyGroup, etc.) to malfunction, new mod_sql and mod_ldap versions from from their respective maintainers, and a few other minor fixes.
Changes: Italian translations, better functionality with Python 2.0, and several bugfixes.
We report on the complex dielectric tensor components of four chalcopyrite semiconductors in an optical energy range (1.4-5.2 eV, from 0.9 eV for CuInSe2) determined at room temperature by spectroscopic ellipsometry. Our results were obtained on single crystals of CuInSe2, CuGaSe2, CuInS2, and CuGaS2. Values of refractive indices n, extinction coefficients k, and normal-incidence reflectivity R in the two different polarizations are given and compared with earlier data where available. We analyze in detail the structures of the dielectric function observed in the studied energy region. Critical-point parameters of electronic transitions are obtained from a fitting of numerically calculated second-derivative spectra d^2e(w)/dw^2. Experimental energies and polarizations are discussed on the basis of published band-structure calculations.
ZnO typifies a class of materials that can be doped via native defects in only one way: either n type or p type. We explain this asymmetry in ZnO via a study of its intrinsic defect physics, including Zn_O, Zn_i, V_O, O_i, and V_Zn and n-type impurity dopants, Al and F. We find that Zn_O is n type at Zn-rich conditions. This is because (i) the Zn interstitial, Zn_i, is a shallow donor, supplying electrons; (ii) its formation enthalpy is low for both Zn-rich and O-rich conditions, so this defect is abundant; and (iii) the native defects that could compensate the n-type doping effect of Zn_i (interstitial O, Oi, and Zn vacancy, V_Zn), have high formation enthalpies for Zn-rich conditions, so these "electron killers" are not abundant. We find that Zn_O cannot be doped p type via native defects (O_i, V_Zn) despite the fact that they are shallow (i.e., supplying holes at room temperature). This is because at both Zn-rich and O-rich conditions, the defects that could compensate p-type doping (V_O, Zn_i, Zn_O) have low formation enthalpies so these "hole killers" form readily. Furthermore, we identify electron-hole radiative recombination at the V_O center as the source of the green luminescence. In contrast, a large structural relaxation of the same center upon double hole capture leads to slow electron-hole recombination (either radiative or nonradiative) responsible for the slow decay of photoconductivity.
The bonding and electronic structure of TiN thin films grown by sputtering have been characterized by means of resonant photoemission spectroscopy using synchrotron radiation. Specifically we found a complex resonance profile that exhibits a maximum at 45 eV followed by a second structure at 50 eV. The intensity enhancement observed at 45 and 50 eV is consistent with the resonant photoemission of the Ti 3d states involved in the valence band of TiN and the multiplet configuration of the [Ti 3p^5 3d^2]* excited states. The autoionizing character of the [Ti 3p^5 3d^2]* states could also be confirmed by observation of the corresponding autoionization emission. The resonance is used to determine the Ti 3d contribution to the valence band. The results are in good agreement with calculated Ti 3d partial density of states.
By means of scanning tunneling microscopy, the Si(313)12x1 surface has been found to be, after Si(111)7x7, another stable elemental semiconductor surface with a metallic nature. On the basis of the details revealed by the high resolution STM images, an atomically rough model consisting of trenches and a variety of building entities has been proposed for the surface structure for further investigation. The common features of major stable silicon surfaces as well as the similarities and differences between these surfaces and their germanium counterparts are discussed in the context of the driving forces behind the reconstruction of elemental semiconductor surfaces.
By means of scanning tunnel microscopy the surface morphology of reconstructed Au(001) surfaces has been studied after bombardment with 600 eV Ar ions as a function of dose, in the range of 10^13 to 10^16 ions/cm2, and the experimental results analyzed in the light of molecular dynamics simulations using a glue potential. At low dose (5x10^13 ions/cm^2) new defects, different from the commonly observed vacancy islands are reported. They appear as depressions 0.06 nm deep, with a characteristic width of 1.44 nm. Bombardment with similar doses of Pt(001) show the same general behavior. Molecular dynamics simulations with a realistic glue potential that reproduces the hexagonal-like Au(001) reconstruction, confirm that these depressions are in fact two-dimensional /3 dislocation dipoles originated by the relaxation of vacancy rows on the ridges of the topmost reconstructed layer. These two-dimensional dipoles are seen to dissociate into individual two-dimensional dislocations that display the characteristics of ordinary bulk dislocations, e.g. glide or climb. At higher doses (3x10^14 ions/cm^2), but well below a nominal removal of 1 monolayer, vacancy islands, one atomic spacing high, are seen to nucleate on these depressions. With increasing ion damage these vacancy islands become the dominant feature. For doses of about 10^15 ions/cm^2, other defects related to the reconstruction, such as perpendicular reconstruction domains and unreconstructed patches of (001) square symmetry, become visible.
CheckInstall keeps track of all files installed by a "make install" or equivalent, creates a Slackware or RPM package with those files, and adds it to the installed packages database, allowing for easy package removal or distribution. Changes: This is a stable release which adds improved RPM support, a user interface, and customization. All known bugs have been fixed.野良インストールには便利そう。
Freedups searches for identical files in the directories you specify and hard-links them together, freeing up drive space without losing performance.
StatistX is a GUI frontend for the statistics program statist. Currently, it provides about 20 different statistical tests and regressions. It is not intended to replace tools like R. Results are presented either as text or Gnuplot graphs. Changes: This release includes the new official release of statist 1.0.0 and provides calculation of percentiles.
Thokbook is a personal library system written in Perl. It is intended for medium-to-large individual collections (several thousand books). Using thokbook, you can add books via ISBN or EAN (usually via a barcode scanner of some kind), get MARC records from libraries (so you don't have to type in the information for the vast majority of your books), and create Web pages so you can list all your books or search them. You can also check books in and out and record who checked them out.日本語の本も OK なら魅力的かも...
freq is a script designed to generate reports and graphs from the lastlog. It can display a variety of information in a variety of ways. Changes: This release speeds things up, allows for the installer to be non-interactive, and has been verified to work with IRIX 6.5.11m.
The vaporization of condensed materials in contact with high-current discharge plasmas is considered. A kinetic numerical method named direct simulation Monte Carlo (DSMC) and analytical kinetic approaches based on the bimodal distribution function approximation are employed. The solution of the kinetic layer problem depends upon the velocity at the outer boundary of the kinetic layer which varies from very small, corresponding to the high-density plasma near the evaporated surface, up to the sound speed, corresponding to evaporation into vacuum. The heavy particles density and temperature at the kinetic and hydrodynamic layer interface were obtained by the analytical method while DSMC calculation makes it possible to obtain the evolution of the particle distribution function within the kinetic layer and the layer thickness.
A laser induced fluorescence technique (LIF) in combination with optical emission spectroscopy (OES) and Rayleigh scattering (RS) was applied to investigate absolute number densities of the population of the three nitrogen triplet states C^3Πu, B^3Πg, and the metastable A^3Σ u+ in an asymmetric low pressure rf discharge. Primary targets of this investigation were the three lowest vibrational levels (v = 0,1,2) of each triplet state and additionally v = 8 of A^3Σu+ which can be populated very efficiently in the plasma sheath. Calibration of LIF intensities to absolute densities of A^3Σu+ and B^3Πg has been realized by comparison with the signal of the RS experiment done in pure nitrogen gas. Calibration of C^3Πu which we could not detect by LIF but rather only by OES was achieved after comparing OES and LIF signals of the B^3Πg state. Excitation energies of the analyzed states range from 6 up to 11.5 eV and the measured number densities differ by about seven orders of magnitude from as much as 1012 cm?3 down to almost 105 cm?3. In addition to the interpretation of the results this article describes the used calibration methods which are partly based on a suggestion made by P. Bogen (Proceedings of the XVI International Conference on Phenomena in Ionized Gases, Invited Papers, edited by W. Botticher, H. Wenk, and E. Schultz-Gulde, Dusseldorf, 1983, pp. 164-173).
Methods to chemically passivate the surfaces of amorphous-carbon films (a-C) produced by dc magnetron sputtering were studied. The chemical composition of carbon surfaces produced via sputtering are dependent upon the environment to which the carbon is exposed immediately following deposition. When the sputtered film is vented to ambient conditions, free radicals produced at the surface during the deposition process are quenched by reaction with oxygen and/or water to form an oxidized, hydrophilic surface. If the sputtered carbon film is, however, exposed to a reactive gas prior to venting to ambient, the chemical nature of the resulting surface can be modified substantially. Specifically, a less highly oxidized and much more hydrophobic carbon surface is produced when the surface free radicals are quenched via either an addition reaction (demonstrated with a fluorinated olefin) or a hydrogen abstraction reaction (demonstrated with two alkyl amines). Chemical modification of amorphous-carbon films can also be accomplished by performing the sputtering in a reactive plasma formed from mixtures of argon with molecular hydrogen, amines, and perfluorocarbons. The elemental composition of these films, and the relative reactivity of the surfaces formed, were investigated via x-ray photoelectron spectroscopy and contact-angle goniometry, respectively. In the case of sputtering with a mixture of argon and hydrogen, increasing the hydrogen flow results in an increase in the amount of hydrogen incorporated into the carbon film and a decrease in the surface free energy. Sputtering in diethylamine produces an amorphous-carbon film into which nitrogen is incorporated. The free energies of the a-C:N surfaces produced in this process are similar to those of the a-C:H films. Sputtering in a fluorocarbon vapor results in the incorporation of fluorine into the film structure and the formation of very low free-energy surfaces. Increasing the concentration of the fluorocarbon in the sputtering plasma increases the amount of F incorporated into the film. At the highest fluorocarbon flow rates employed, a-C films were produced with stoichiometries and surface free energies comparable to those of bulk Teflon.
CvsGraph is a utility for generation of graphical representation of revisions and branches from a CVS/RCS repository. Changes: This is a major rewrite of a lot of code. CvsGraph reads the repository file directly, which enables the proper evaluation of the tree structure in the repository when revision numbers are not in order. Branches are compacted horizontally so that a tree with many branches doesn't take too much space. Branches with no revisions are shown. Branches and revisions which are not in sequence or do not start at 1.1 are properly plotted. Minor configure updates, implementation of imagemaps, an ability to generate HTML that allows linking in the form of imagemaps, changes to some configuration parameters, and an ability to add custom expansion string from the command-line using -[0-9]. The executable has become significantly larger because of table optimization in flex. You can disable the optimization in configure with '--disable-speed'. This will slow the execution, but reduce the size.
Changes: FreeBSD 4.2 support and several bugfixes.
ttf2pt1 converts TTF fonts (.ttf) into PostScript Type 1 fonts and metrics (.pfa, .pfb, .afm). It can read not only TrueType but any other scalable font format supported by the FreeType2 library as well. Changes: This release fixes spurious aborts when guessing the font encodings and other lesser problems. Its has been tested with FreeType-2.0.
Changes: This release includes a workaround for mkisofs on Cygwin where partial archiving could happen, a fix for a mkisofs cmdline parsing bug with -- fileame, support for the latest Cygwin+GCC, support for Win ME, and fixes to avoid system hangs on SCO Unixware 7.1.1.
Most Debian application packages depend on other packages, containing libraries or other utilities. When the application package is removed, the dependencies will still linger on the system. Debfoster can detect such "orphaned" dependencies and will clean them up. It can be used as a front-end to apt or standalone. Changes: This release has been internationalised (with a Dutch translation included), and complies to the latest version of the Debian FHS.
The xmlprocfs is a new filesystem to report the data reported by proc filesystem in XML format, so the applications can read it easily. There is not any other difference between xmlproc filesystem and proc filesystem. Only some files can generate XML data now. Changes: This release of xmlprocfs should be applied to linux-2.4.2, and includes a great deal of proc output function fomalizing in the kernel, as well as some bugfixes.
Starting from a continuum description, we study the non-equilibrium roughening of a thermal re-emission model for one and two spatial dimensions. Using standard analytical techniques, we map our problem to a generalized version of an earlier non-local KPZ (Kardar-Parisi-Zhang) model. In 2+1 dimensions, the values of the roughness and the dynamic exponents calculated from our theory go like $ \alpha \approx z \approx 1 $ and in 1+1 dimensions, the exponents resemble the KPZ values for low vapor pressure, supporting experimental results. Interestingly, Galilean invariance is maintained althrough.
This is a guide to setting up your GNU/Linux workstation as a digital VCR using the video4linux driver and a supported tuner card.* NEW entry
Changes: A fix for the NLS build under Linux (builds with NLS by default, as an unavoidable side effect of fix), various cleanups and minor bugfixes in OTP support, a fix for a header error in SSL support, an updated Spanish translation, and incorporation of Red Hat's 5.5.0 Kerberos V patch and a fetchmailconf warning on local names with @.
FreeAmp is an MP3/Vorbis/CD Audio player/Jukebox for Linux and Win32. It features both graphical theme and text-based user interfaces, a download manager for automating MP3 downloads, and a powerful music browser/playlist manager. Other features include HTTP/RTP streaming playback with HTTP stream saving and title streaming, and a fast, clean-sounding Open Source decoding engine. It supports Win32/OSS sound systems, ALSA, and EsounD. Changes: This release includes some general bugfixes, improved ID3 support, Vorbis beta 4 support, improved Relatable TRM features, and a new KDE/arts plug-in.
g4u ("ghost for unix") is a bootfloppy that allows one to easily clone PC
harddisks by using FTP. This is often done to deploy a common setup on a
number of PCs. The floppy offers two functions: it uploads the compressed
image of a local harddisk to a FTP server, and then it can retrieve that
image via FTP, uncompress it, and write it back to disk. Network
configuration is fetched via DHCP. As the harddisk is processes as a image,
any filesystem and operating system can be deployed using g4u.
Changes: This is a maintenance release, with lots of doc updates.
ほお。
Changes: Some improvements to the wineserver protocol, the usual common controls fixes/improvements, version information in builtin dlls, and lots of bugfixes.
You can use extractdiff to extract or exclude patches from patch files according to a shell wildcard pattern.これではナンノコッチャだが、 こういういもの らしい。diff -r したパッチに使うのね。
Changes: This release fixes a bug in the scanners timeout.
vsftpd is an FTP server written from the ground up to be free of security holes, whilst providing safeguards so the impact is low if it isn't. It is also very small and fast. Changes: Fixes for nasty bugs whereby the data connection timeout went off incorrectly, per-user chroot(), a banned anonymous email address list, PASV range restriction, minor performance enhancements, a vsftpd.conf.5 man page, and non-PAM local authentication.ふーむ。
ReiserFS has problems supporting NFS because 64 bits of information are required to find an object in the tree, and NFS expects to find an inode with just the inode number (32-bits long). The good news is the NFS file handle has enough room to store the extra information ReiserFS needs in order to find the file again later, and other kernel developers have written APIs to give the file system control over some of the file handle. By the time this article is out, there should be public patches to add proper NFS support to ReiserFS.ということらしい。
This document is intended to be the comprehensive guide to the installation, administration, maintenance, and use of the Bugzilla bug-tracking system.
(load-library "mailcrypt") (mc-setversion "2.6") (autoload 'mc-sign-region "mc-toplev" nil t)としたらできるようになった。 とはいえどこにも 公開鍵 登録してないので、sign することなど実生活ではほとんどないのだが(苦笑)
recover automates some steps as described in the Ext2fs-Undeletion-howto in order to recover a lost file. This utility will greatly increase your file recover rate. People who do not know how to undelete a file are encouraged to use this utility. Changes: A fix for a bug in support for RAID and other exotic devices.そういえば reiser だと Undeletion ってどうなんだろうか。
Simple network top (sntop) is a curses-based console utility in the spirit of top that polls network hosts at a regular interval to determine their connectivity and displays the results in a pretty format. Advanced features are supported, such as automatic HTML generation of results, secure terminal mode, execution of an external file on connectivity changes, a daemon mode, and user/system configure files.
whois supports all protocol extensions (RIPE, 6bone, CRSNIC) with the familiar RIPE command line interface and IPv6 support. It also automagically queries the right registry for all domains and most netblocks. Changes: Updated .at, .be, .cy, .cz, .ee, .gr, .il, .pl, .ro, .vi, and .nz ccTLDs, new -cz, -nicat, -norid, and -rotld nic handles, new Telstra IP allocations, and a fix for a fencepost error.
Apt-sources simplifies the task of finding the nearest APT servers. The server list can be either downloaded and parsed from Debian.org or read in from a local file via a command-line argument. The scoring of the servers is done using embedded Netselect source code for distance (hops) and latency. The user also has the option of testing the servers using embedded BING source code for bandwidth scoring. Other command-line arguments include saving top placing servers to a file for future scoring and distribution selection (stable, unstable, and testing). Changes: Apt-Sources v2.0 has been totally rewritten. It has rid itself of Netselect and Bing source code and all other external source code. It now benchmarks lists of Debian mirrors via FTP and generates a sources.list of the best servers.ふむむ。
Gnome Flow is a program written to calculate and visualize simple steady-state fluid flows. It uses the relaxation method, and can calculate flows past symmetric objects. Steady-state means that it calculates the flow at a given time, and that the physical parameters are constant in time. Changes: Object data can be loaded from graphic files of many formats. Timer driven pressure calculation was added. Online help was updated.
Latex2slides is a simple graphical program that produces a set of HTML/jpeg slides from a TeX or LaTeX source.
NuLab is a numeric (not symbolic as Mathematica/Maple, but numercial as MatLab) math program. License: Free for non-commercial use
ciGraphica is a scientific application for data analysis and technical graphics. It pretends to be a clone of the popular commercial application "Microcal Origin", supplying plotting features for 2D, 3D, and polar charts. It features opening several worksheets and plots to work with at the same time, fully-configurable plots using a control panel dialog, a completely WYSIWYG look and feel, and publication-quality PostScript output. Changes: This release adds improved Postscript output, a preferences dialog, the first version of a Bonobo interface, emergency save in case of a crash, and dozens of bugfixes.む!