1,036 research outputs found
Electronic gating circuit and ultraviolet laser excitation permit improved dosimeter sensitivity
Standard dosimeter reader, modified by adding an electronic gating circuit to trigger the intensity level photomultiplier, increases readout sensitivity of photoluminescent dosimeter systems. The gating circuit is controlled by a second photomultiplier which senses a short ultraviolet pulse from a laser used to excite the dosimeter
Fee Hunting in North and South Dakota
Resource /Energy Economics and Policy,
Jumpstart your Week with a Monday Mile
Research shows that people view Monday as a day for a fresh start and are more likely to start diet and exercise programs, quit smoking, and schedule doctor’s appointments on Monday than any other day. This issue brief discusses the benefits of kick starting your week with a Monday Mile and profile a local community that created several Monday Mile routes where local residents can interact and be active
The Sugar Industry Gets Rich and We Get Sick
This issue brief takes a deep dive into strategies the sugar industry uses to gain profits while making us sick
Antarctic Meteorite Location and Mapping Project (AMLAMP): Antarctic meteorite location map series explanatory text and user's guide to AMLAMP data
This technical report is an update to LPI Technical Report 89-02, which contained data and information that was current to May 1987. Since that time approximately 4000 new meteorites have been collected, mapped, and characterized, mainly from the numerous ice fields in the Allan Hills-David Glacier region, from the Pecora Escarpment and Moulton Escarpment in the Thiel Mountains-Patuxent region, the Wisconsin Range region, and from the Beardmore region. Meteorite location maps for ice fields from these regions have been produced and are available. This report includes explanatory texts for the maps of new areas and provides information on updates of maps of the areas covered in LPI Technical Report 89-02. Sketch maps and description of locales that have been searched and have yielded single or few meteorites are also included. The meteorite listings for all the ice fields have been updated to include any classification changes and new meteorites recovered from ice fields in the Allan Hills-David Glacier region since 1987. The text has been reorganized and minor errors in the original report have been corrected. Computing capabilities have improved immensely since the early days of this project. Current software and hardware allow easy access to data over computer networks. With various commercial software packages, the data can be used many different ways, including database creation, statistics, and mapping. The databases, explanatory texts, and the plotter files used to produce the meteorite location maps are available through a computer network. Information on how to access AMLAMP data, its formats, and ways it can be used are given in the User's Guide to AMLAMP Data section. Meteorite location maps and thematic maps may be ordered from the Lunar and Planetary Institute. Ordering information is given in Appendix A
An Apple a Day Keeps Diabetes at Bay: Incentivizing Participation in Diabetes Self-Management Education with Fruit & Vegetable Vouchers
Diabetes is an urgent public health problem in the U.S., with 30.3 million people currently diagnosed with Type 2 diabetes. This research brief describes the results of a 12-month, diabetes self-management education and fruit and vegetable purchase assistance intervention designed to improve diabetes self-management knowledge and health outcomes among adults diagnosed with Type 2 diabetes. Findings suggest that small incentives for fruit and vegetable purchases are associated with higher educational program attendance, increased fruit and vegetable consumption, and decreased weight and blood sugar among low-income adults with Type 2 diabetes
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Experiences with Prototype InfiniBand Hardware
This report describes testing of prototype InfiniBand{trademark} host channel adapters from Intel Corporation, using the Linux(reg sign) operating system. Three generations of prototype hardware were obtained, and Linux device drivers were written which exercised the data movement capabilities of the cards. Latency and throughput results obtained were similar to other SAN technologies, but not significantly better
Investigation of dust bands from blue ice fields in the Lewis Cliff (Beardmore) area, Antarctica: A progress report
Blue ice fields in Antarctica are well known for their high areal meteorite concentrations. The exact type of accumulation model and the age of the ice is still not well known. Dust bands on blue ice fields may help to clarify some of these problems. Dust, which has been isolated from dust band samples from blue ice areas in the Lewis Cliff/Walcott Neve area (Beardmore region), Antarctica, was studied to determine petrographic characteristics and chemical compositions. One sample has an average grain size of around 0.5mm, and is rather different from the others in its abundances of trace elements. The REE pattern and some other trace element ratios of that sample suggest it is a sediment from the local Beacon Supergroup, which has been scooped up from the ground by ice movement. The other five samples which were investigated have very small grain sizes (20μm), and abundant glass shards. Major element data on the glass shards (and some feldspar crystals, which are also present in the dust band samples) allow the conclusion that they have originated from an alkaline volcano. The chemical composition of the glasses is highly variable, some showing basanitic composition, some showing trachytic or peralkaline K-trachytic composition. The silica vs. sum of alkalis plot shows that the Lewis Cliff samples are different from dust collected at the Allan Hills, but that there is a close similarity with volcanic material from The Pleiades, Northern Victoria Land. The trace element chemistry of all volcanic samples show the characteristic volcanic trace elements, like Ta, W, Sb, Th, and the REE, enriched by a considerable factor. The REE patterns exhibit a prominent negative Eu anomaly, which may be explained by mixing basanites (no Eu anomaly, but steep REE patterns) with K-trachytes and peralkaline K-trachytes (very pronounced negative Eu anomaly). The same components are obvious in major element analyses of individual glass shards, thus each dust band is a mixture of at least three different source materials (which, however, originated from the same volcano in a single eruption). The Pleiades seem to be a likely source for the volcanic debris found in the dust bands at Lewis Cliff
Leveraging Low-Energy Structural Thermodynamics in Halide Perovskites
Metal halide perovskites (MHPs) combine extraordinary optoelectronic
properties with chemical and mechanical properties not found in their
semiconductor counterparts. For instance, they exhibit optoelectronic
properties on par with single-crystalline gallium arsenide yet exhibit
near-zero formation energies. The small lattice energy of MHPs means they
undergo a rich diversity of polymorphism near standard conditions similar to
organic materials. MHPs also demonstrate ionic transport as high as
state-of-the-art battery electrodes. The most widespread applications for metal
halide perovskites (e.g. photovoltaics and solid-state lighting) typically view
low formation energies, polymorphism, and high ion transport as a nuisance that
should be eliminated. Here, we put these properties into perspective by
comparing them to other technologically relevant semiconductors in order to
highlight how unique this combination of properties is for semiconductors and
to illustrate ways to leverage these properties in emerging applications
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