... 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 "ring of fire" seen by satellite cameras around the polar caps (picture below) is probably created by electrons leaking from the tail's plasma sheet, whose magnetic field lines form a somewhat imperfect trap. ... One possible explanation involves the close association between auroral arcs and electric currents which flow along field lines between the ionosphere and distant space ( Birkeland currents ). ... That produces an extra resistance to the flow of current. ...

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 . ...

This page shows which observing modes are available with which correlator and gives a brief description of the observing modes.. available; . ... WAPP . ... ALFA . ... Calibration mode that scans 4 times across the calibrator, forming a spider shape. ... Calibration mode that scans twice across the calibrator, forming a cross shape. ... This is the standard spectral-line single-pixel observing mode. ... A Calibration mode used by the Galactic ALFA surveys to calibration the G-ALFA HI Spectrometer. ...

... As of October 1, 2009, the global rate for the STIS NUV-MAMA dark current has still been occasionally reaching values as high as 13500 counts/s. This high dark current will force use of a signficantly smaller buffer time than would be otherwise needed, and in many cases may push the count rate high enough to make time-tag observations impractical. ... However, we instead found for the NUV MAMA detector an initial global dark rate of between 9000 and 18000 counts/s (a mean of 0.013 counts/s/pixel). ...

Solar Flare Origin - critical analysis" Lev Pusti'lnik We analyze current approach to solar flare origin in 3 aspects: a. Pre-flare equilibrium state of current-magnetic structure above active region and its evolution to flare state, b. Possible reasons of stability loss with transition of system in flare state c. Flare energy release in turbulent current sheet and particle acceleration in this system. ...

... ATNF Home . About ATNF . ... About ATNF overview . ... Australia Telescope Steering Committee . ... Australia Telescope User Committee . ... Astrophysics graduate student programs . ... Australian Square Kilometre Array Pathfinder . Murchison Radio-astronomy Observatory . ... Parkes radio telescope . Australia Telescope Compact Array . ... Current telescope status . ... Visiting Parkes radio telescope . Visiting Australia Telescope Compact Array . ... Parkes radio telescope webcam . ...

... News Latest News News Archive Newsletter Quarterly Status Report . ... How to use SAS SAS Workshops SAS Version Changes Download and Install SAS Science Simulator (SciSim) . Archive, Pipeline & Catalogues XMM-Newton Science Archive Pipeline Processing System Observation Data Status Time Correlation Fix Serendipitous Source Catalogue OM Serendipitous Source Catalogue Slew Survey Catalogue Latest Slew Results Browsing Interface for RGS Data Live Radiation Monitor Plots Radiation Monitor Files . ...

... Astrophysics Group . ... COAST . COAST Current Status . ... COAST File Archive . ... Fringes and Power Spectra from COAST . ... The first stellar fringes were obtained in June 1991. ... We obtained sufficient data to reconstruct the first infrared image from an aperture synthesis array. ... The North telescope of the COAST array was moved to a new foundation, further to the North, making the longest baseline 67 metres. ... A fifth telescope was sited on the Southwest arm of the COAST array. ...

. ___________________________________________________________________ The Electronic Universe Project e-mail: nuts@moo.uoregon.edu

... Directions to MRO and Current Road Conditions . You Can Get There From Here (but it isn't easy!) This is a map of how to get to the Manastash Ridge Observatory. ... Please note that as of the winter of 2002 the state in its infinte wisdom has seen fit to save the many salmon in the Manastash Creek by plowing under the Riggs Canyon Road. ... You will travel about 108 miles on I-90 before seeing the Canyon Road exit. ... Umptanum Road is 0.5 miles from the Canyon Road exit. ...

... Sun images . Magnetic storms online . ... Geomagnetic activity forecast . ... March : 2012 . ... No geomagnetic storms were observed for the past 3 hours Geomagnetic storms were observed for the past 24 hours . Magnetic storm of level G1 (minor) from 00:00 to 03:00 UT . Magnetic storm of level G2 (moderate) from 03:00 to 06:00 UT . Magnetic storm of level G3 (strong) from 06:00 to 09:00 UT . ... Last updated: March 10, 2012 00:00 UT . ... 7(499)132-65-96, Fax: +7(499)132-65-97 . ...

... Tonight's Sky . ... The Magazine . ... Star Atlas . ... An artificial comet holds secrets to Earths life . ... Astronomy for Kids . ... Observing springtime deep-sky objects with a large telescope . ... The planet has extreme temperature swings and perhaps active lava flows. ... A digital supplement to Astronomy magazine. ... Join TravelQuest International with Astronomy and Discover magazines on one of three great tour options surrounding this celestial spectacle . ... Astronomy Magazine . ...

... Infrared astronomy . ... Online resources . ... 1995 - . ... 1996 - . ... The Astronomical Journal . ... 1849 - 1997(ADS) . ... 1989 - 2013 . ... The Astrophysical Journal . ... The Astrophysical Journal Letters . ... The Astrophysical Journal Supplement Series . ... Communicating Astronomy with the Public (CAP) Journal . ... Journal for the History of Astronomy . ... Journal Geophysical Research A : Space Physics . ... Linux Journal ** For online access, please contact the Library . ... 1996 - 2013...

... General information . ... Eurasian Astronomical Society . Main Optional Sections (Workshops) . ... Main Deadlines . ... The conference "Astronomy - 2005: Current State and Prospects" is to be held in Moscow, Russia, on June 1-6, 2005, in the frame of the Scientific Program of the 8th General Meeting of the Eurasian Astronomical Society. The main goal of the Symposium is to analyze the current state and possible prospect of astronomical science and work out a strategy of its development. ...

... Размер: 2;1 . Цвет: Голубой . ... Рубашки / Блузки . ... Артикул: D122_15KR Цвет: белый Состав: 50% вискоза, 50% полиэстер Описание: элегантная блуза без рукава. ... Цвет: черный . ... Черный глянец металла облагораживает и сдерживает невероятный шик образа, достойного лучших интерьеров.<div><br></div><div>Цоколь: E14.</div><div>Мощность: 8х40.</div> . ... Ящик для 20 ключей Office-Force с кодовым замком, цвет: черный - Office-Force - Office-Force . ...

... Share your current Research with us . ... От: "Journal of Geology Geosciences" . ... Тема: Share your current Research with us . ... Journal of Geology Geosciences publishes original Research/Review/Mini-review/Commentary/Opinion articles, Short communication, Case Reports etc, which covers the topics related to Earth Sciences, Climatic Change, Disaster Management, Disaster Preparedness Mineralogy, Geodesy, GIS, Remote Sensing, Anthropology, Geography of the Earth, Primatology, Planetary Sciences...

... Wind Speed: 0 mph . ... Average (15 minutes): 1 mph . Current Rainfall: 0.00 in/hr . Rain Storm Total: 0.00 in . Storm Started: n/a . Rainfall Totals: . Today: 0.00 in . This Month: 0.78 in . ... Sunrise: 7:06AM . ... Credit: Joe Jaworski's Davis Weather Station Linux software . ...

... The star formation rate (SFR) of the current SF episode can be estimated from the total H luminosity. ... For the derived total flux F (H )=5.8 erg s -1 cm -2 we obtain a total H luminosity of 10 39 erg s -1 . ... The total mass of ionized gas can be obtained from the average mass density inside the H II region and its volume. An average mass density corresponding to the average electron density of 1 cm -3 within a volume with a diameter of 0.5 kpc yields a total ionized gas mass of 10 6 . ...

. When you log on to the system you are always placed in your home directory . At first this is your current directory. If you then change to another directory this becomes your current directory. The command pwd displays the full pathname to your current directory.