A5084983562- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Avian ecology and behavior
- Dark Matter and Cosmic Phenomena
- Neutrino Physics Research
- Laser-Plasma Interactions and Diagnostics
- Wildlife-Road Interactions and Conservation
- Animal Ecology and Behavior Studies
- Laser-induced spectroscopy and plasma
- Particle Detector Development and Performance
- Wildlife Ecology and Conservation
- Traffic and Road Safety
- Computational Physics and Python Applications
- Particle Accelerators and Free-Electron Lasers
- Atomic and Molecular Physics
- Computational Fluid Dynamics and Aerodynamics
- Bird parasitology and diseases
- Fluid Dynamics and Turbulent Flows
- Wildlife Conservation and Criminology Analyses
- Astrophysics and Cosmic Phenomena
- Rangeland Management and Livestock Ecology
- Animal Behavior and Reproduction
- Laser-Matter Interactions and Applications
- Advanced X-ray Imaging Techniques
Muhlenberg College
2005-2024
Universidade Federal do Paraná
2021
Florida College
2021
University of Florida
2021
Lawrence Livermore National Laboratory
1993-2004
Herzberg Institute of Astrophysics
1990-1992
National Academies of Sciences, Engineering, and Medicine
1990-1992
Carleton University
1992
Kobe University
1991-1992
The University of Tokyo
1991-1992
ABSTRACr.--Counts migrating hawks were initiated in 1934 at Hawk Mountain and, except for 1943-1945, have continued to the present. We analyzed data from 1934-1986 by a standardized sample period appropriate each species. Counts of several species known be susceptible detrimental effects organochlorine pesticides crashed between 19461971. All these populations recovered subsequently. The immature-age classes and with shortest generation times first after DDT use diminished North America....
We studied building characteristics and landscape context to predict risk of migratory birds being killed by colliding with sheet glass on Manhattan Island, New York City, York, USA. Trained volunteers monitored 73 discrete facades daily from the Upper East Side southern tip Island during autumn 2006 spring 2007 bird periods using a consistent scientifically valid search protocol. recorded 475 strikes in 74 which 82 85%, respectively, were fatal. Most variables exerted moderate influence...
Billions of birds are estimated to be killed striking clear and reflective windows worldwide, conservation, ethical, legal reasons justify preventing this unintended human-associated avian mortality. Field experiments reveal that effective, UV signals used prevent bird-window collisions must minimally reflect 20–40% from 300–400 nm. 3.175 mm parachute cord hung in front separated by 10.8 cm 8.9 effective collision preventive methods. The results the experiment those previous studies support...
Collisions with buildings cause up to 1 billion bird fatalities annually in the United States and Canada. However, efforts reduce collisions would benefit from studies conducted at large spatial scales across multiple study sites standardized methods consideration of species- life-history-related variation correlates collisions. We addressed these research needs through coordinated collection data on (35), Canada (3), Mexico (2). collected all carcasses identified species. After removing...
Extensive observations and experiments suggest that collisions with plate glass result in more avian mortalities than any other human-associated factor. We tested the effects of window angling distance bird feeders from windows on bird-glass collisions. Strike frequency differed among oriented vertically (control) those angled 20 40 degrees vertical; as angle orientation increased, strikes fatalities decreased. at also increased between surface increased. No were recorded when located within...
Birds behave as if clear and reflective glass plastic windows are invisible, annual avian mortality from collisions is estimated in the billions worldwide. Outdoor flight cage field experiments were used to evaluate different methods prevent between birds windows. Stripe grid patterns of UV-reflecting UV-absorbing window coverings presented an effective warning that avoid while offering little or no obstructed view for humans. UV-reflected signals space occupied by sheet plastic. Window with...
We report the results of a study three-prong decay mode $\ensuremath{\tau}$ in data taken with DELCO detector at SLAC ${e}^{+}{e}^{\ensuremath{-}}$ storage ring PEP. determine total branching ratio to be $B(3)=(12.1\ifmmode\pm\else\textpm\fi{}0.5\ifmmode\pm\else\textpm\fi{}1.2)%$ and exclusive ratios...
Birds killed by colliding with towers and windows were studied to describe the type extent of injuries and, more precisely, suggest actual cause death. A total 502 specimens (247 tower kills, 255 window kills) dissected, radiographed, examined. Tower collision categories further subdivided consider age (subadult versus adult) weight (<39 g, sparrow-size or smaller, > 39 cardinal size larger) differences in injury differential vulnerability. Injuries classified as superficial, subdermal,...
Sheet glass and plastic in the form of clear reflective windows are universally lethal to birds. Reasonable interpretation available scientific evidence describes as a principal human-associated avian mortality factor that is an indiscriminant killer common species well conservation concern. A conservative toll estimates 1 billion or more annual fatalities United States alone. The injury death from birds striking foreseeable preventable, but most promising legal measures commercial products...
We report a measurement of the branching ratios for two decay modes τ lepton: RB(τ±→K±K∓π±ντ)=(0.22−0.11+0.17)% and RB(τ±→K±π∓π±(π0)ντ)=(0.22−0.13+0.16)%. The separation these channels is accomplished in DELCO detector by use gas Čerenkov counter to identify fast kaons. invariant-mass distribution K±K∓π± system has been used set an upper bound on neutrino mass 157 MeV at 95% confidence limit.Received 13 November 1984DOI:https://doi.org/10.1103/PhysRevLett.54.624©1985 American Physical Society
We have studied inclusive D*± production using the DELCO detector at PEP. Our technique involved kaon identification in momentum range above 3.2 GeV/c a threshold gas Čerenkov counter. This leads to model-independent upper limit on D0−D¯0 mixing of 8.1% (90% confidence level). also measured charm fragmentation function, which peaks x≡PD*(Ebeam2−MD*2)12 0.56±0.06(stat.), and total cross section for D* production, σ(D*±)=0.140±0.021(stat.)±0.032(syst.) nb (x>0.3, with radiative...
Results are reported from a study of the impact parameters electrons in hadronic events produced at PEP ${e}^{+}{e}^{\ensuremath{-}}$ storage ring. Electrons by bottom and charm decay their show hadrons containing quarks to have lifetime ${1.16}_{\ensuremath{-}0.34}^{+0.37}$(stat.) \ifmmode\pm\else\textpm\fi{}0.23 (syst.) psec. This result is used constrain elements Kobayashi-Maskawa mixing matrix.
Stimulated Brillouin backscatter from large scale-length gas-filled targets has been measured on the Nova laser. These were designed to approximate conditions in indirect drive ignition target designs underdense plasma electron density (ne∼1021/cm3), temperature (Te≳3 keV), and gradient scale lengths (Ln∼2 mm, Lv≳6 mm) as well calculated gain for stimulated scattering (SBS). The used these experiments balloons with polyimide walls (gasbags) hohlraums. Detailed characterization using x-ray...
Inclusive electrons have been studied in hadronic events from ${e}^{+}{e}^{\ensuremath{-}}$ annihilation at 29 GeV. The cross section is measured as $\ensuremath{\sigma}({e}^{+}{e}^{\ensuremath{-}}\ensuremath{\rightarrow}{e}^{\ifmmode\pm\else\textpm\fi{}}X)=35.8\ifmmode\pm\else\textpm\fi{}4.6$ pb the momentum range $0.5<p<5.5$ GeV/c. semielectronic branching ratios of $b$ and $c$ quarks are found to be (14.6 \ifmmode\pm\else\textpm\fi{} 2.8)% (9.1 1.3)%, respectively. Hard...