175 research outputs found
Charge collection and trapping in lowâtemperature silicon detectors
Charge collection efficiency measurements in silicon detectors at low temperature (T \u3c 0.5 K) and low applied electric field (E=0.1â100 V/cm) were performed using a variety of highâpurity, pâtype silicon samples with roomâtemperature resistivity in the range 2â40 kΊâcm. Good charge collection under these conditions of low temperature and low electric field is necessary for background suppression, through the simultaneous measurement of phonons and ionization, in a very low event rate dark matter search or neutrino physics experiment. Charge loss due to trapping during drift is present in some samples, but the data suggest that another chargeâloss mechanism is also important. We present results which indicate that, for 60 keV energy depositions, a significant fraction of the total charge loss by trapping occurs in the initial electronâhole cloud near the event location which may briefly act as a shielded, fieldâfree region. In addition, measurements of the lateral size, transverse to the applied electric field, of the initial electronâhole cloud indicate large transverse diffusion lengths. At the lowest fields a lateral diameter on the order of 1 mm is found in a detector âź5 mm thick
Transcriptional analysis of the innate immune response of ducks to different species-of-origin low pathogenic H7 avian influenza viruses
BACKGROUND: Wild waterfowl, including ducks, represent the classic reservoir for low pathogenicity avian influenza (LPAI) viruses and play a major role in the worldwide dissemination of AIV. AIVs belonging to the hemagglutinin (H) 7 subtype are of epidemiological and economic importance due to their potential to mutate into a highly pathogenic form of the virus. Thus far, however, relatively little work has been conducted on elucidating the host-pathogen interactions of ducks and H7 LPAIVs. In the current study, three H7 LPAIVs isolated from either chicken, duck, or turkey avian species were evaluated for their comparative effect on the transcriptional innate immune response of ducks. RESULTS: Three H7 LPAIV isolates, chicken-origin (A/chicken/Maryland/MinhMa/2004), duck-origin (A/pintail/Minnesota/423/1999), and turkey-origin (A/turkey/Virginia/SEP-67/2002) were used to infect Pekin ducks. At 3 days post-infection, RNA from spleen tissue was used for transcriptional analysis using the Avian Innate Immune Microarray (AIIM) and quantitative real-time RT-PCR (qRT-PCR). Microarray analysis revealed that a core set of 61 genes was differentially regulated in response to all three LPAIVs. Furthermore, we observed 101, 135, and 628 differentially expressed genes unique to infection with the chicken-, duck-, or turkey-origin LPAIV isolates, respectively. qRT-PCR results revealed significant (p<0.05) induction of IL-1β, IL-2, and IFNγ transcription, with the greatest induction observed upon infection with the chicken-origin isolate. Several key innate immune pathways were activated in response to LPAIV infection including the toll-like receptor and RIG-I-like receptor pathways. CONCLUSIONS: Pekin ducks elicit a unique innate immune response to different species-of-origin H7 LPAIV isolates. However, twelve identifiable genes and their associated cell signaling pathways (RIG-I, NOD, TLR) are differentially expressed regardless of isolate origin. This core set of genes are critical to the duck immune response to AI. These data provide insight into the potential mechanisms employed by ducks to tolerate AI viral infection
The Ursinus Weekly, April 28, 1978
Ursinus news in brief: Fire wakes New Dorm; Muds victorious; Faculty members promoted; Ec student cited; Files accessible; Weekly to change name; Hash bash ⢠Richter outlines proposed changes ⢠Judiciary Board revived ⢠Reaction to Richter encouraging, optimistic ⢠Comment: The Happy days ⢠Letters to the editor: Necessary repair?; Fletcher controversy; Curriculum force in gear; And again; Student comments; Alumni speaks; Staff member reacts ⢠Finally an answer: a modest proposal ⢠Top tunes ⢠Language action group: Dubious privilege ⢠Cub and Key present alumni ⢠Renaissance: Changing with the seasons ⢠Apology ⢠Women\u27s lacrosse cradles to Cape Cod ⢠B-ball banquet ⢠Muds win big ⢠Lacrosse wrap-up ⢠Ursinus track: 3-2 ⢠Widener takes two ⢠Tennis team optimistichttps://digitalcommons.ursinus.edu/weekly/1085/thumbnail.jp
The Grizzly, October 20, 1978
Homecoming \u2778 Promises Color, Excitement ⢠Judiciary Board Convicts Two ⢠Shopping Center to Expand ⢠On Personal Expression ⢠Is Pledging All Fun and Games? ⢠Ursinus\u27 Financial Aid Structure ⢠SFARC Repairs Damage Policy ⢠Gallagher Explores Amish ⢠Springsteen & Dylan: Poet Laureates or Veritable Zeros? ⢠The World\u27s Largest Hamburger ⢠Paradise Lost: College Woods Gone Junkyard? ⢠X-C: Dual Wins ⢠Bears Fall Prey Again ⢠Soccer Wins Five ⢠News in Brief: Our New Look; Remember to Vote; Yom Kippur Celebration; Ursinus Announces Business Workshop; Library News Shortshttps://digitalcommons.ursinus.edu/grizzlynews/1003/thumbnail.jp
Technical Proposal for FASER: ForwArd Search ExpeRiment at the LHC
FASER is a proposed small and inexpensive experiment designed to search for
light, weakly-interacting particles during Run 3 of the LHC from 2021-23. Such
particles may be produced in large numbers along the beam collision axis,
travel for hundreds of meters without interacting, and then decay to standard
model particles. To search for such events, FASER will be located 480 m
downstream of the ATLAS IP in the unused service tunnel TI12 and be sensitive
to particles that decay in a cylindrical volume with radius R=10 cm and length
L=1.5 m. FASER will complement the LHC's existing physics program, extending
its discovery potential to a host of new, light particles, with potentially
far-reaching implications for particle physics and cosmology.
This document describes the technical details of the FASER detector
components: the magnets, the tracker, the scintillator system, and the
calorimeter, as well as the trigger and readout system. The preparatory work
that is needed to install and operate the detector, including civil
engineering, transport, and integration with various services is also
presented. The information presented includes preliminary cost estimates for
the detector components and the infrastructure work, as well as a timeline for
the design, construction, and installation of the experiment.Comment: 82 pages, 62 figures; submitted to the CERN LHCC on 7 November 201
Bridging Alone: Religious Conservatism, Marital Homogamy, and Voluntary Association Membership
This study characterizes social insularity of religiously conservative American married couples by examining patterns of voluntary associationmembership. Constructing a dataset of 3938 marital dyads from the second wave of the National Survey of Families and Households, the author investigates whether conservative religious homogamy encourages membership in religious voluntary groups and discourages membership in secular voluntary groups. Results indicate that couplesâ shared affiliation with conservative denominations, paired with beliefs in biblical authority and inerrancy, increases the likelihood of religious group membership for husbands and wives and reduces the likelihood of secular group membership for wives, but not for husbands. The social insularity of conservative religious groups appears to be reinforced by homogamyâparticularly by wives who share faith with husbands
Characterization Of Large-Area Silicon Ionization Detectors For The ACE Mission
We report on extensive tests of large-area (10 cm diameter) high-purity ion-implanted silicon detectors for the solar isotope spectrometer (SIS), and lithium-drifted silicon detectors for the cosmic ray isotope spectrometer (CRIS), which are under development for launch on the advanced composition explorer (ACE) mission. Depletion and breakdown characteristics versus bias were studied, as were long-term current and noise stability in a thermally cycled vacuum. Dead-layer and total thickness maps were obtained using laser interferometry, beams of energetic argon nuclei and radioactive sources of alpha particles. Results, selection criteria, and yields are presented
2002 Wild Blueberry Project Reports
The 2002 edition of the Wild Blueberry Project Reports was prepared for the Wild Blueberry Commission of Maine and the Wild Blueberry Advisory Committee by researchers at the University of Maine, Orono. Projects in this report include:
1. Factors Affecting Microbial and Pesticide Residue Levels on Wild Blueberries
2. Effect of Blueberry Products on Oxidation in Meat Based Food
3. Determination of Pesticide Residue Levels in Freshly Harvested and Processed Wild Blueberries
4. Detection of Infested Wild Blueberries using Near-Infrared Spectroscopy
5. Investigation Of The Mechanism By Which Blueberry Fractions Maintain Arterial Integrity
6. Antioxidant Assessment in the Elderly
7. Water Use of Wild Blueberries and the Impact of Plant Water Stress on Yield
8. Control Tactics for Wild blueberry Pest Insects
9. IPM Strategies
10. Pest Biology
11. Wild Blueberry Pollination Research
12. Survey and Determination of Effective Control of Stem Blight and Leaf Spot Diseases in Wild Blueberry Fields
13. Effect of Foliar-applied Iron Chelate Concentration on Leaf Iron Concentration, Wild Blueberry Growth and Yield
14. Effect of Boron Application Methods on Boron Uptake in Wild Blueberries
15. Effect of Foliar N spray on Leaf N Concentration, Growth and Yield of Wild Blueberries
16. Effect of Foliar Spray (4-13-15) on Leaf Nutrient Concentration, Growth and Yield of Wild Blueberries
17. Effect of Foliar Copper Application on Growth and Yield of Wild Blueberries
18. Effect of Foliar Copper and/or Iron Application on Growth and Yield of Wild Blueberries
19. Effect of Soil pH on Nutrient Uptake
20. Assessment of Hexazinone Alternatives for Weed Control in Wild Blueberries and Weed Control
21. Evaluation of Fall Applications of Sulfonylurea Herbicides for Bunchberry Control in Wild Blueberries
22. Evaluation and Demonstration of Techniques for Filling in Bare Spots in Wild Blueberry Fields
23. Blueberry Extension Education Program Base
24. 2002 Pesticide Groundwater Survey
25. Cultural Weed Management using sulfur to lower the p
2003 Wild Blueberry Project Reports
The 2003 edition of the Wild Blueberry Project Reports was prepared for the Wild Blueberry Commission of Maine and the Wild Blueberry Advisory Committee by researchers at the University of Maine, Orono. Projects in this report include:
1. Factors Affecting the Microbial and Pesticide Residues Levels on Lowbush Blueberries
2. Effect of Blueberry Products on Oxidation in Ground Beef Patties
3. Infestation Detection using Near-Infrared Spectroscopy
4. Whole Wild Blueberries and Arterial Functional Properties
5. Irrigation Water use in Wild Blueberry Production
7. Control Tactics for Blueberry Pest Insects
8. IPM Strategies
9. Biology and Ecology of Blueberry Pest Insects, 2003
10. Wild Blueberry Pollination Research
11. Stem Blight/Dieback and Leaf Spot Diseases in Wild Blueberry Fields
12. Effect of Foliar N spray on Leaf N Concentration, Growth and Yield of Wild Blueberries
13. Effect of Foliar Spray (4-13-15) on Leaf Nutrient Concentration, Growth and Yield of Wild Blueberries
14. Effect of Foliar Copper Application on Growth and Yield of Wild Blueberries
15. Effect of Foliar Copper and/or Iron Application on Growth and Yield of Wild Blueberries
16. Effect of Soil pH on Nutrient Uptake.
17. Effect of Gibberellic Acid (GA3) and CPPU on Fruit Set and Yield of Wild Blueberry after low temperature flower stress
18. Effect of Fertilizer Timing (prune year vs. crop year) on Wild Blueberry Growth and Productivity.
19. Assessment of Hexazinone Alternatives for Weed Control in Wild Blueberries and Weed Control and Field Cover Program Base
20. Evaluation of Fall Applications of Sulfonylurea Herbicides for Bunchberry Control in Wild Blueberries
21. Assessment of clean-cut adapter on hand clippers for weed control in wild blueberries
22. Evaluation and Demonstration of Techniques for Filling in Bare Spots in Wild Blueberry Fields
23. Blueberry Extension Education Program in 2003
24. 2003 Pesticide Groundwater Survey
25. Cultural Weed Management using Sulfur to lower the p
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