Tag: 上海水磨


22 KPBSD School Sites To Host Budget Development Forum

first_imgAt 6:00pm, on Tuesday, October 30, KPBSD school principals will meet with site-councils and the public after a live video-streamed presentation from the district to all 22 school sites in the district. Facebook0TwitterEmailPrintFriendly分享The process is rolling forward for Fiscal Year 2019-2020 budget planning process for the Kenai Peninsula Borough School District. Participant input will be synthesized and presented to the KPBSD school board during future board meetings and work sessions.Link: KPBSD Finance Department Pegge Erkeneff, KPBSD Communications Liaison: “This year in particular we’re really focusing on site councils and everybody that has any interests in ours schools, or concerned about our school remaining high quality schools should come out to one of our site councils.” center_img Erkeneff: “We will video stream from the district office, and then after the video stream locally at each site the principal will be meeting with the community that is gathered there for that school.” According to Erkeneff, the meeting will provide an opportunity to learn about reductions which have been considered in the past—some implemented, some not—as well as potential new or additional revenue will be explored.last_img read more


Get early access to Elder Scrolls Blades on iOS and Android

first_imgBethesda describes The Elder Scrolls: Blades as a “classic dungeon crawler reimagined.” Your customized character is a Blade, one of the Empire’s top agents, who’s forced into exile. While you’re fleeing, your hometown is destroyed. The company said it plans to add new features to the game after the launch. It’s letting early-access players into the game in waves, but there’s still time to sign up here. Bethesda also provided a full list of supported devices. Early access supports English, French, Italian, German, Spanish and Russian. Earlier this week, to kick off its celebration, Bethesda offered a free PC copy of Elder Scrolls III: Morrowind. 3:18 Tags Now playing: Watch this: Elder Scrolls: Blades hits the new iPhone Bethesda is offering early access to The Elder Scrolls: Blades. Bethesda Gaming studio Bethesda said on Twitter Wednesday that The Elder Scrolls: Blades is getting a limited early-access program on iOS and Android. The early access is part of the 25th anniversary celebration for the Elder Scrolls game series. “Ready to play? We’re inviting players in waves, so make sure to keep an eye on your email for the invite,” Bethesda said. As part of our #TES25 celebration, we’re excited to announce that The Elder Scrolls: #Blades is officially in Early Access!Ready to play? We’re inviting players in waves, so make sure to keep an eye on your email for the invite.Here’s the updated FAQ: https://t.co/TZsYW4pnJy pic.twitter.com/2reothr8Zs— The Elder Scrolls (@ElderScrolls) March 27, 2019center_img Comments Share your voice 2 Gaming Mobile iOS 12last_img read more


Extraordinary light enhancement technique proposed for nanophotonic devices

first_img The researchers, Rebecca Sainidou from the Spanish National Research Council (CSIC), Jan Renger from the Institute of Photonic Sciences (ICFO), and coauthors from various institutes in Spain, have published their study on the new method for dielectric light enhancement in a recent issue of Nano Letters. As the scientists explain, one of the biggest problems for nanophotonic devices made of metal is that the metals in these devices absorb some light, limiting the overall light intensity. Here, the researchers proposed using dielectric rather than metallic structures, and described three different arrangements for achieving a large light enhancement: dielectric waveguides, dielectric particle arrays, and a hybrid of these two structures. In each of the three proposed arrangements, the researchers show that, by suppressing absorption losses, light energy can be piled up in resonant cavities to create extremely intense optical fields. “Metallic structures can produce a similar level of enhancement via localized plasmon excitation, but only over limited volumes extended a few nanometers in diameter,” coauthor Javier García de Abajo from CSIC told PhysOrg.com. “In contrast, our work involves a huge enhancement over large volumes, thus making optimum use of the supplied light energy for extended biosensing applications and nonlinear optics. In metallic structures, absorption can be a problem because of potential material damage and because it reduces the available optical energy in the region of enhancement. This type of problem is absent in our dielectric structures.“One could obtain large light intensity enhancement just by simply accumulating it from may sources (e.g., by placing the ends of many optical fibers near a common point in space, or by collecting light coming from many large-scale mirrors). But this sounds like wasting a lot of optical energy just to have an enhancement effect in a small region of space. However, this is essentially what metallic structures do to concentrate light in so-called optical hot-spots using plasmons. In contrast, our structures do not concentrate the light in tiny spaces: they amplify it over large volumes, and this has important applications. This amplification is done through the use of evanescent and amplifying optical waves, which do not transport energy, but can accumulate it.” Although theoretically there is no upper limit to the intensity enhancement that these structures can achieve, fabrication imperfections limit the enhancement to about 100,000 times that of the incident light intensity. In a proof-of-principle demonstration of the dielectric waveguide arrangement, the researchers showed a light intensity enhancement of a factor of 100. The researchers predict that this moderate enhancement should be easily improved by reducing the interface roughness through more careful fabrication, and are currently working on experiments to demonstrate a larger light enhancement.As the researchers explain, part of the “holy grail” of designing nanodevices for optical applications is the ability to control light enhancement, as well as light confinement and subwavelength light guiding. By demonstrating the possibility of achieving an extremely large light intensity in large volumes, the researchers have opened up new possibilities in many nanophotonics applications. For example, nanophotonics components have already been used to produce artificial magnetism, negative refraction, cloaking, and for biosensing.“Certain molecules are produced in our bodies preferentially when we suffer some illnesses (e.g., tumors, infections, etc.),” García de Abajo said. “The detection of these molecules can sometimes be a difficult task, because they are seldom encountered in minute concentrations. A practical way of detecting these molecules, and thus unveiling the potential illness to which they are associated, is by illuminating them and seeing how they scatter or absorb light (e.g., how light of different colors is absorbed by these molecules or how they change the color of the light). Therefore, it is important to amplify the optical signal that these molecules produce, so that we can have access to them even if they are in very low concentrations. Our structures do precisely that: they amplify the light over large volumes, so that if the molecules to be detected are placed inside those volumes, they will more easily produce the noted optical signal (absorption, color change, etc.). This is thus a practical way of detecting diseases such as cancer.“In a different direction, light amplification is useful to produce a nonlinear response to the external light, and this can be directly applied to process information encoded as optical signals. This is an ambitious goal that is needed to fabricate optical computers. Such computers are still far from reachable, but they are expected to produce a tremendous increase in the speed of computation and communication. Our structures provide an innovative way of using light in devices for information processing.” Citation: Extraordinary light enhancement technique proposed for nanophotonic devices (2010, November 3) retrieved 18 August 2019 from https://phys.org/news/2010-11-extraordinary-technique-nanophotonic-devices.html Explore further More information: Rebecca Sainidou, et al. “Extraordinary All-Dielectric Light Enhancement over Large Volumes.” Nano Letters, ASAP. DOI: 10.1021/nl102270p Breakthrough in nano-optics: Researchers develop plasmonic amplifier (PhysOrg.com) — In a new study, scientists have shown that simply tailoring the nanoscale geometrical parameters of dielectric structures can result in an increase in the light intensity to unprecedented levels. Theoretically, they calculate that the light intensity could be increased to up to 100,000 times that of the incident intensity over large volumes. This large light enhancement could lead to new developments in all-optical switching and biosensing applications. This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only. Copyright 2010 PhysOrg.com. All rights reserved. This material may not be published, broadcast, rewritten or redistributed in whole or part without the express written permission of PhysOrg.com.last_img read more


British ornithologists track cuckoo birds migration route

first_img Society warns cuckoo bird in danger of extinction The group not only tagged the birds with backpacks, which cost about £2,000 each, but also named them (Lyster, Chris, Clement, Martin and Kasper) and allowed others to track their journey via Google Maps. Unfortunately, only two of the group managed to survive the journey (Lyster and Chirs, though there is still some hope for Kasper) from Norfolk in England to the Congo and back, but the collars did provide a clear map of the migration routes of the birds, which oddly, were quite different for each bird, even as they all ended up in nearly the same place for their winter stay. Citation: British ornithologists track cuckoo birds migration route (2012, May 7) retrieved 18 August 2019 from https://phys.org/news/2012-05-british-ornithologists-track-cuckoo-birds.html All of the birds made it to the Congo, it was in coming back that they ran into trouble. To do so, they have to stop and fill up twice; once before crossing the Sahara desert, then again before crossing the Mediterranean Sea. And though the test was of just of one small group migrating once, BTO members are already hypothesizing that it’s possible the birds might be finding it more difficult to fill up properly before crossing the big hazards, than in years past, which would account for fewer of them surviving the trip north.One surprise the group found was that the cuckoos all veered slightly west, towards Cameroon, before heading due north, for the return trip, which shouldn’t have been a surprise after all, as that allows for traveling over the narrowest part of the desert. There are other hazards as well though, they found, one bird, Martin apparently met his demise after wandering into a violent hail storm.Despite the losses, the team views the study as a success. Much more is now known about the migration of the cuckoo bird and because of that, some efforts might begin to help more of the birds survive the round trip each year, thus preventing them from disappearing altogether. Lyster, pre-migration. Image: BTO More information: www.bto.org/science/migration/ … yster/finding-lystercenter_img (Phys.org) — Nowhere it seems, are bird watchers more enthusiastic than in Britain, where groups congregate to watch and discuss the most intimate details of their favorite fowl. Of consternation to such groups however is the decline of several favorite species, one of which is the cuckoo, which has seen a nearly fifty percent drop in numbers in just the past couple of decades. Making matters even more frustrating has been the lack of data on the birds which might offer clues as to why their numbers are dropping. Now, one group, the British Trust for Ornithology (BTO) has taken matters into its own hands by capturing and fitting five wild cuckoos with tiny radio backpacks to allow for tracking of the birds during their annual migration. The hope is that by tracking the birds to see where some die, efforts can be made to help them survive. © 2012 Phys.Org Explore further This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only.last_img read more