... The choice of which type of electricity is called "positive" and which "negative" was made around 1750 by Ben Franklin, early American scientist and man of many talents (the stamp on the left commemorates his role as first US postmaster--and colonial postmaster before that). ... Franklin knew of two types of electric charge, depending on the material one rubbed. ... Later, when electric batteries were discovered, scientists naturally assigned the direction of the flow of current to be from (+) to (-...

The choice of which type of electricity is called "positive" and which "negative" was made around 1750 by Ben Franklin, early American scientist and man of many talents. Franklin studied static electricity, produced by rubbing glass, amber, sulfur etc. with fur or dry cloth. ... Later, when electric batteries were discovered, scientists naturally assigned the direction of the flow of current to be from (+) to (-). ... Exploration" home page (index) Glossary . Official GSFC Home Page .. ...

Name: PGSLCT Purpose: select an open graphics device Category: GRAPHICS File: pgplot.src Author: T.J. Pearson Use: see description below. Description: SUBROUTINE PGSLCT(ID) INTEGER ID Select one of the open graphics devices and direct subsequent plotting to it. The argument is the device identifier returned by PGOPEN when the device was opened. ... Arguments: ID (input, integer): identifier of the device to be selected. Updates: Oct 16, 1998: JPT automatically extracted from source. ...

Подписка на рассылку обзоров astro-ph на Subscribe.Ru . ... Предыдущий выпуск (N335) . ... Обсудить на форуме Scientific.RU . ... Подписка на рассылку обзоров на Subscribe.Ru . Обзоры препринтов astro-ph . ... Собственно обзоры препринтов. ... Ранее обзоры также были на Астронете и на Scientific.Ru . ... АНКи доступны на Астронете , а с 2006 по 2008 г. также на сайте Элементы.Ру . ... Ранее они также размещались на сайте Астронет и в архиве моих обозрений (кодировка KOI8) на сайте Scientific.Ru . ...

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vps is a perl script which provides a terminal-based interactive view of all process, in a tree-structured format. ... The basic display is separated into a top area, where the process tree is displayed. and a bottom three lines, where additional details on the currently selected process is displayed. ... The bottom area of the selected process shows on the first line the current processes' command and arguments. ... Move cursor down one line . ... Move cursor up one line . ...

The NTP Version 3 daemon currently supports several different radio, satellite and modem reference clocks plus a special pseudo-clock used for backup or when no other clock source is available. Detailed descriptions of individual device drivers and options can be found in the Reference Clock Drivers page. Additional information can be found in the pages referenced there, including the Debugging Hints for Reference Clock Drivers and How To Write a Reference Clock Driver pages. ...

... Apache HTTP Server Version 2.2 . ... mod_proxy extension for load balancing . ... Thus, in order to get the ability of load balancing, mod_proxy and mod_proxy_balancer have to be present in the server. ... Enabled via lbmethod=byrequests , the idea behind this scheduler is that we distribute the requests among the various workers to ensure that each gets their configured share of the number of requests. ... lbfactor is how much we expect this worker to work , or the workers's work quota . ... worker...

Kermit output files are named ker number_object_filter_time .fits. number is a four-digit integer that increments for each subsequent exposure. object is the object name (with spaced removed) as entered by the observer. filter is the name of the currently selected filter wheel position. time is the current UTC time as a six-digit integer, HHMMSS. ... Kermit has three selectable pixel timing modes: fast readout, slow readout, and slow readout with reset. ... Kermit has three readout modes: . ...

XMM-Newton Science Analysis System . ... Meta Index / Home Page / Description The selected function facilitates step-wise filtering of tables. Used as a sub-expression it evaluates to true for a particular row if that rows has been selected in the selection process preceding the current one. If the table undergoes selection for the very first time, selected returns true for all table rows, i.e., has no effect. ... SELECTED && PHA >= 10 . ... XMM-Newton SOC/SSC -- 2007-07-08 ...

The run progress pages document the execution of Service Mode and Visitor Mode observing runs carried out at the Paranal Observatory. A summary of the run's characteristics is given, as well as a time-stamped list of all Observation Blocks (OB) that were executed until now. ... If reduced data for the given run exist, those are also reported in both the OB Summary table and in the details. ... Reduced : information shown only if pipeline-processed reduced data exist for the OB . ... OB ID . ...

CIMA is more than just the observing tool - in fact, the observing tool is just a part of a bigger package called the CIMA software package. ... There is also a another package called the CIMA WAPP software which contains the WAPP software, the special Tcl/Tk interpreter used by CIMA and support libraries. ... All CIMA software components recognize the following general options that are part of the CIMA version selection system: . ... The select_cima script can be used to set up a default version. ...

... Document Title | Document Number | ... The code uses fields: category, system, subsystem, EMA, vendor, and a sequential number. ... Previous Document Number This is a TEXT field and represents the document number that preceeds the found document in the set of original documents supplied by the engineer/vendor. ... Next Document Number This is a TEXT field and represents the document number that follows the found document in the set of original documents supplied by the engineer/vendor. ...

APRIL, 2006 . ... MAY, 2006 . ... JUNE, 2006 . ... JULY, 2006 . ... AUGUST, 2006 . ... SEPTEMBER, 2006 . ... OCTOBER, 2006 . ... NOVEMBER, 2006 . ... Head of homepage . Data archive . ...

Next: The exercise level Up: Using Ceilidh as a Student Previous: Using Ceilidh as a Student . ... This menu is identical whether it is obtained from the system level of Ceilidh using the sc command, or by entering Ceilidh with a -c argument. ... Course Summary button) If the teacher remembers to keep the information up-to-date, this command gives you a summary of the timetable for your course, with . ... ceilidh -c pr1 . ... If you entered the course level from the system level using first ceilidh . ...

... Content Model: one ore more OPTION elements . The SELECT element is used for single and multiple choice menus. ... Example: <SELECT NAME="flavor"> <OPTION>Vanilla <OPTION>Strawberry <OPTION>Rum and Raisin <OPTION>Peach and Orange </SELECT> . ... When you want a multiple choice menu, you need to include the MULTIPLE attribute with the SELECT element, e.g. <SELECT MULTIPLE NAME="flavor"> . ... NAME . ... The presence of this attribute denotes that the SELECT element defines a multiple choice menu. ...

... They have been used to describe the content of the 105 columns available in the different VizieR tables. ... We present different applications of UCDs: selection of catalogues, based on their content; identification of catalogues having similar fields; automated data conversion allowing direct comparison of data in cross-identifications. ... Metadata for the VO: The Case of UCDs 71 Figure 2. Example of statistics on the different column names and units used in all VizieR tables for one UCD. ...

... commands . ... data_spectrum <name> : data in "spectrum" format . ... Repeat command to add additional mask regions. sigma is the s.d. to apply to the data within the region to be masked. ... Repeat command to add additiona continuum regions. ... cont_reg_clear : Clear current continuum regions . ... The observed spectrum is then multipled by this filter to obtain a new spectrum for use by SFIT. cont_sigma : Computes standard deviation of data in continuum regions and applies it to current data . ...

... A file upload element on an HTML form. ... JavaScript 1.1: added type property . ... The HTML INPUT tag, with "file" as the value of the TYPE attribute. For a given form, the JavaScript runtime engine creates appropriate FileUpload objects and puts these objects in the elements array of the corresponding Form object. ... form . ... For all FileUpload objects, the value of the type property is "file" . ... Use the value property to obtain the file name that the user typed into a FileUpload object. ...

... Tonight's Sky . ... The Magazine . ... Observing . ... Magazine . ... Gravitational wave search provides insights into galaxy evolution and mergers . ... The double star 54 Leonis, spiral galaxy NGC 3198, and emission nebula NGC 3199 . ... Astronomy for Kids . ... The different types of supernovae . ... Get instant access to subscriber content on Astronomy.com! ... Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter. ... Astronomy Magazine . ...