Posted: January 15, 2019 San Diego receives more state funds to reduce homelessness January 15, 2019 Updated: 10:25 PM Sasha Foo, Sasha Foo Categories: Local San Diego News FacebookTwitter 00:00 00:00 spaceplay / pause qunload | stop ffullscreenshift + ←→slower / faster ↑↓volume mmute ←→seek . seek to previous 12… 6 seek to 10%, 20% … 60% XColor SettingsAaAaAaAaTextBackgroundOpacity SettingsTextOpaqueSemi-TransparentBackgroundSemi-TransparentOpaqueTransparentFont SettingsSize||TypeSerif MonospaceSerifSans Serif MonospaceSans SerifCasualCursiveSmallCapsResetSave SettingsSAN DIEGO (KUSI) – San Diego and San Diego County are receiving tens of millions of dollars to provide emergency help and programs for those who are homeless.According to the latest count, there are more than 8,500 people without permanent housing in San Diego County.As the largest city in the county, San Diego has been sinking more money over the last year into homeless shelters and services.The city now has three large bridge shelters in operation, which are taking 700 men, women and children off the streets every night.In the last 15 months, the city has teamed up with the non-profit group, Jewish Family Service to open up two parking lots in Kearny Mesa as a safe space for San Diegans who use their cars as shelter.Last summer, the city opened up a storage center in Sherman Heights so that people who live on the street would have a place to hold their possessions.All of these programs and facilities cost money. The State of California is now providing a large chunk of that funding. “The good news is the State is stepping up to the plate,” said San Diego Mayor Kevin Faluconer.The City of San Diego is receiving $14 million from the state’s HEAP program which is short for Homeless Emergency Aid Program.The Regional Task Force on the Homeless is picking up $18.8 million from the same state fund.Both of these monies are one time awards, and must be spent over the next two years.There’s a third source of funding that just became available, thanks to a Senate bill authored by State Senator Toni Atkins. $2.5 million is coming to the Regional Task Force on the Homeless with a requirement to spend the money in five years.Altogether, the three grants total just over $35 million for the region.The head of the Alpha Project, Bob McElroy said the greatest need is for shelter facilities. McElroy, whose group runs one of the city’s three bridge tents said more than 30% of the people who stayed in the Alpha Project tent over the last year were able to transition to longer term or more permanent housing. He scoffed at critics who said the number of people who find permanent housing should be much higher.The longtime homeless service provider said raising those numbers will be impossible unless more low income housing units are built. “We’re short 17,000 units of new low income housing every year in San Diego. That’s from the Housing Commission. Are we going to get there anytime soon? I don’t see it. But in the meantime, we should at least have a safe place for people to go,” McElroy said.
Citation: Cryogenic Phonon Scintillators to Help in Search for Dark Matter (2006, March 17) retrieved 18 August 2019 from https://phys.org/news/2006-03-cryogenic-phonon-scintillators-dark.html What do WIMPs and MRIs have in common?Besides being acronyms, both the dark matter candidate and the medical diagnostic technique could benefit from the next generation of cryogenic scintillators being developed. While physicists are primarily focusing on the search for dark matter and answers to how the universe is built, they’re creating a detector with superior energy resolution and distinguishing capabilities that could have repercussions beyond the questions of the universe. 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. This cryogenic detector can distinguish space background radiation from the recoil energy of a WIMP interacting with the nuclei of normal matter. Labeled parts: 1 – scintillating crystal, which physicists measured different materials for best fit, 2 – reflector, 3 – light detector, 4 and 4’ – thermometer calorimeter film, which can sense a small temperature difference caused by energy released during WIMP events, 5 – particle, 6 – phonons, which result when the crystal vibrates, and 7 – light. Image credit: Mikhailik, V. B. and Kraus, H. Based on the way that galaxies spin, cosmologists believe that a form of matter which doesn’t reflect light must exist in the universe. Not only does this dark matter affect how galaxies spin, but a particular amount of it would balance out the total mass of the universe so that it’s not so light that one day it collapses back in on itself. Cosmologists wonder what dark matter could be made of that makes it so enigmatic and massive, and theorists favor a type of particle called a WIMP (Weakly Interacting Massive Particle). On very rare occasions, WIMPS may interact with nuclei in normal matter and impart a tiny amount of recoil energy to the nuclei.Although physicists may be able to detect this recoil energy, they face a couple of large challenges. For one, the amount of recoil energy is so small that current detectors haven’t been able to pick up any signals. Also, a background of space radiation and cosmic rays interfere with the energy of the nuclei, and make it difficult for detectors to distinguish the two sources. Physicists V. Mikhailik and H. Kraus from the University of Oxford are looking for materials that might work for a new type of detector called a cryogenic phonon scintillator detector (CPSD). As they report in a recent Journal of Physics D: Applied Physics, CPSDs could have superior energy resolution and the ability to discriminate between particles and radiation, and possibly be able to detect rare WIMP interactions. The high hopes for the new CPSDs stem from the way that these detectors work. CPSDs are constructed of crystals that increase in temperature when energy is deposited in them. Because these scintillating crystals can distinguish the subtlest temperature differences at the lowest temperatures, CPSDs operate optimally at temperatures close to absolute zero (in the 10-15 millikelvin range, or nearly –459°F) for the best chance of detecting WIMP events. Since operating CPSDs at extremely low temperatures is an entirely new area of research, Mikhailik and Kraus experimented with different types of materials to determine which give sufficient light at extremely low temperatures. At the same time, the materials must have very low intrinsic radioactivity in order to discriminate between different types of radiation. “In the first phase of the experimental search for WIMPs, a few CPSD detectors made of CaWO4 crystals (material which is used worldwide as x-ray screen in medical diagnostics) have already been tested and delivered excellent results,” Mikhailik told PhysOrg.com. “The next experiment will plan to use different scintillation targets with a total mass of about 100 kg, which should allow verification of a WIMP signal.”The physicists’ deeper understanding of the potential of CPSDs at low temperatures also has applications in fields such as medicine and security inspection. For example, CPSD technology could enhance image quality in diagnostic tools and reduce a patient’s radiation doses. CPSDs at low temperatures could also pick up signals from neutrons and use their ability to penetrate metal shielding made of heavy nuclei, which interact predominantly with the lighter nuclei in materials of interest. “Apparently the search for cryogenic scintillators today is the science-driven initiative that will prepare the grounds for technological progress in respective areas tomorrow,” wrote Mikhailik and Kraus.Citation: Mikhailik, V. B. and Kraus, H. Cryogenic scintillators in searches for extremely rare events. J. Phys. D: Appl. Phys. 39 (2006) 1181-1191.By Lisa Zyga, Copyright 2006 Physorg.com