49,500 research outputs found
Doctors at War: Life and Death in a Field Hospital
[Excerpt from jacket] Doctors at War is a candid account of a trauma surgical team based, for a tour of duty, at a field hospital in Helmand, Afghanistan. Mark de Rond tells of the highs and lows of surgical life in hard-hitting detail, bringing to life a morally ambiguous world in which good people face impossible choices and in which routines designed to normalize experience have the unintended effect of highlighting war\u27s absurdity. With stories that are at once comical and tragic, de Rond captures the surreal experience of being a doctor at war. He lifts the cover on a world rarely ever seen, let alone written about, and provides a poignant counterpoint to the archetypical, adrenaline-packed, macho tale of what it is like to go to war
Evaluating the development of wearable devices, personal data assistants and the use of other mobile devices in further and higher education institutions
This report presents technical evaluation and case studies of the use of wearable and mobile computing mobile devices in further and higher education. The first section provides technical evaluation of the current state of the art in wearable and mobile technologies and reviews several innovative wearable products that have been developed in recent years. The second section examines three scenarios for further and higher education where wearable and mobile devices are currently being used. The three scenarios include: (i) the delivery of lectures over mobile devices, (ii) the augmentation of the physical campus with a virtual and mobile component, and (iii) the use of PDAs and mobile devices in field studies. The first scenario explores the use of web lectures including an evaluation of IBM's Web Lecture Services and 3Com's learning assistant. The second scenario explores models for a campus without walls evaluating the Handsprings to Learning projects at East Carolina University and ActiveCampus at the University of California San Diego . The third scenario explores the use of wearable and mobile devices for field trips examining San Francisco Exploratorium's tool for capturing museum visits and the Cybertracker field computer. The third section of the report explores the uses and purposes for wearable and mobile devices in tertiary education, identifying key trends and issues to be considered when piloting the use of these devices in educational contexts
Spam
With the advent of the electronic mail system in the 1970s, a new opportunity for direct marketing using unsolicited electronic mail became apparent. In 1978, Gary Thuerk compiled a list of those on the Arpanet and then sent out a huge mailing publicising Digital Equipment Corporation (DECânow Compaq) systems. The reaction from the Defense Communications Agency (DCA), who ran Arpanet, was very negative, and it was this negative reaction that ensured that it was a long time before unsolicited e-mail was used again (Templeton, 2003). As long as the U.S. government controlled a major part of the backbone, most forms of commercial activity were forbidden (Hayes, 2003). However, in 1993, the Internet Network Information Center was privatized, and with no central government controls, spam, as it is now called, came into wider use. The term spam was taken from the Monty Python Flying Circus (a UK comedy group) and their comedy skit that featured the ironic spam song sung in praise of spam (luncheon meat)ââspam, spam, spam, lovely spamââand it came to mean mail that was unsolicited. Conversely, the term ham came to mean e-mail that was wanted. Brad Templeton, a UseNet pioneer and chair of the Electronic Frontier Foundation, has traced the first usage of the term spam back to MUDs (Multi User Dungeons), or real-time multi-person shared environment, and the MUD community. These groups introduced the term spam to the early chat rooms (Internet Relay Chats). The first major UseNet (the worldâs largest online conferencing system) spam sent in January 1994 and was a religious posting: âGlobal alert for all: Jesus is coming soon.â The term spam was more broadly popularised in April 1994, when two lawyers, Canter and Siegel from Arizona, posted a message that advertized their information and legal services for immigrants applying for the U.S. Green Card scheme. The message was posted to every newsgroup on UseNet, and after this incident, the term spam became synonymous with junk or unsolicited e-mail. Spam spread quickly among the UseNet groups who were easy targets for spammers simply because the e-mail addresses of members were widely available (Templeton, 2003)
Singular hermitian metrics on vector bundles
We introduce a notion of singular hermitian metrics (s.h.m.) for holomorphic
vector bundles and define positivity in view of -estimates. Associated
with a suitably positive s.h.m. there is a (coherent) sheaf 0-th kernel of a
certain -complex. We prove a vanishing theorem for the cohomology of this
sheaf. All this generalizes to the case of higher rank known results of Nadel
for the case of line bundles. We introduce a new semi-positivity notion,
-nefness, for vector bundles, establish some of its basic properties and
prove that on curves it coincides with ordinary nefness. We particularize the
results on s.h.m. to the case of vector bundles of the form ,
where is a -nef vector bundle and is a positive (in the sense of
currents) line bundle. As applications we generalize to the higher rank case 1)
Kawamata-Viehweg Vanishing Theorem, 2) the effective results concerning the
global generation of jets for the adjoint to powers of ample line bundles, and
3) Matsusaka Big Theorem made effective.Comment: LaTex (article) 25 pages; revised: minor changes; to appear in
Crelle's J; dedicated to Michael Schneide
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