22,116 research outputs found
The environmental vegetation index: A tool potentially useful for arid land management
The NOAA-6 AVHRR data sets acquired over South Texas and Mexico during the spring of 1980 and after Hurricane Allen passed inland are analyzed. These data were processed to produce the Gray-McCrary Index (GMI's) for each pixel location over the selected area, which area contained rangeland and cropland, both irrigated and nonirrigated. The variations in the GMI's appear to reflect well the availability of water for vegetation. The GMI area maps are shown to delineate and to aid in defining the duration of drought; suggesting the possibility that time changes over a selected area could be useful for irrigation management
NRQCD results on the MILC extra coarse ensemble
We present preliminary results using NRQCD to describe heavy quarks on the
MILC 2+1 flavour dynamical extra coarse ensemble. We calculate the spectra of
low lying states in bottomonium to complement earlier results on the finer MILC
ensembles. We then exploit the coarseness of the lattices to calculate charm
propagators using NRQCD. These are used to examine the charmonium spectrum and
to calclate the mass of the using NRQCD. Finally we look breifly at the
and systems using the imporoved staggered formalism to describe the
light valence quarks.Comment: 6 pages, Talk presented at Lattice 2005 (Heavy Quarks), Dublin, 25-30
July 200
Characteristics, of TIROS, GOES, DMSP and LANDSAT Systems
The characteristics of the TIROS, GOES, DMSP and LANDSAT systems of satellites are described. The data listed for each system are altitude of orbit, inclination/position, orbit type, orbits per day, expected operational lifetime and the sensor systems. The sensor systems are described as to wavelength of each channel, resolution, field of view and other pertinent information. Data information such as availability rate, collection method, primary use/application and how to obtain additional information is also given
Advanced Very High Resolution Radiometer (AVHRR) data evaluation for use in monitoring vegetation. Volume 1: Channels 1 and 2
Data from the National Oceanic and Atmospheric Administration satellite system (NOAA-6 satellite) were analyzed to study their nonmeteorological uses. A file of charts, graphs, and tables was created form the products generated. It was found that the most useful data lie between pixel numbers 400 and 2000 on a given scan line. The analysis of the generated products indicates that the Gray-McCrary Index can discern vegetation and associated daily and seasonal changes. The solar zenith-angle correction used in previous studies was found to be a useful adjustment to the index. The METSAT system seems best suited for providing large-area analyses of surface features on a daily basis
Meteorological satellite data: A tool to describe the health of the world's agriculture
Local area coverage data acquired aboard the TIROS-N satellite family by the advanced very high resolution radiometer systems was examined to determine the agricultural information current. Albedo differences between channel 2 and channel 1 of the advanced very high resolution radiometer LAC (called EVI) are shown to be closely correlated to the Ashburn vegetative index produced from LANDSAT multispectral scanner data which have been shown to vary in response to "greenness", soil moisture, and crop production. The statistical correlation between the EVI and the Ashburn Vegetative Index (+ or - 1 deg) is 0.86
Infrared Quasi Fixed Points and Mass Predictions in the MSSM II: Large tan(beta) Scenario
We consider the infrared quasi fixed point solutions of the renormalization
group equations for the Yukawa couplings and soft supersymmetry breaking
parameters in the MSSM in the \underline{large } regime. The
existence of IR quasi fixed points together with the values of gauge couplings,
third generation quarks, lepton and Z-boson masses allows one to predict masses
of the Higgs bosons and SUSY particles as functions of the only free parameter,
, or the gluino mass. The lightest Higgs boson mass for TeV is found to be GeV for and
GeV for .Comment: 15 pages, LateX file with 4 eps figures, corrected numbers, new
column in table, last versio
The Perturbative Pole Mass in QCD
It is widely believed that the pole mass of a quark is infrared-finite and
gauge-independent to all orders in perturbation theory. This seems not to have
been proved in the literature. A proof is provided here.Comment: 12 pages REVTeX with 2 figures; archiving published version with note
and references added. If you thought this was proven long ago see
http://www-theory.fnal.gov/people/ask/TeX/mPole
Leading and Managing Those Working and Living in Captive Environments
I magine you are the warden of a prison or the administrator of a jail, you enter the facility, and the heavy metal door clangs shut behind you. A riot breaks out and several members of your staff are taken hostage. Fires are set in various locations. The rioting inmates, members of a gang, attack other inmates who want no part in the rebellion and are only concerned for their safety. The decisions you as a leader make are literally matters of life or death, not only for yourself, but also for your staff and those incarcerated. The dynamics of power and guarding against potential corruption are also a constant concern. The leader of an incarceration facility must account for and respond to public opinion and political demands, as well as the individual needs and group dynamics of corrections officers and inmates.
Some of the desired outcomes for leaders in a confinement setting are a reduction in recidivism, security of the facility, prevention of escape, and efforts at rehabilitation. While some would argue that depending upon the reason for incarceration, the inmates do not deserve much more consideration than would an animal in a zoo, others-leaders-in this situation strive for much more. Accomplished leaders in a confinement setting seek to develop a culture that creates and sustains the psychological health and well-being of the corrections officers and provides inmates opportunities to develop skills and their potential. After all, they are in the people business. Such an approach would conceivably result in an institution that functions based on the strengths of the corrections officers and inmates, thereby allowing them the greatest opportunity for self-development, physical and psychological security, and indirectly decreased chances of recidivism.
This chapter discusses the contexts of confinement, the psychology of corrections officers and inmates, and the forces at work on a leader and the population being led
Leading and Managing Those Working and Living in Captive Environments
I magine you are the warden of a prison or the administrator of a jail, you enter the facility, and the heavy metal door clangs shut behind you. A riot breaks out and several members of your staff are taken hostage. Fires are set in various locations. The rioting inmates, members of a gang, attack other inmates who want no part in the rebellion and are only concerned for their safety. The decisions you as a leader make are literally matters of life or death, not only for yourself, but also for your staff and those incarcerated. The dynamics of power and guarding against potential corruption are also a constant concern. The leader of an incarceration facility must account for and respond to public opinion and political demands, as well as the individual needs and group dynamics of corrections officers and inmates.
Some of the desired outcomes for leaders in a confinement setting are a reduction in recidivism, security of the facility, prevention of escape, and efforts at rehabilitation. While some would argue that depending upon the reason for incarceration, the inmates do not deserve much more consideration than would an animal in a zoo, others-leaders-in this situation strive for much more. Accomplished leaders in a confinement setting seek to develop a culture that creates and sustains the psychological health and well-being of the corrections officers and provides inmates opportunities to develop skills and their potential. After all, they are in the people business. Such an approach would conceivably result in an institution that functions based on the strengths of the corrections officers and inmates, thereby allowing them the greatest opportunity for self-development, physical and psychological security, and indirectly decreased chances of recidivism.
This chapter discusses the contexts of confinement, the psychology of corrections officers and inmates, and the forces at work on a leader and the population being led
Silicon isotopic abundance toward evolved stars and its application for presolar grains
Galactic chemical evolution (GCE) is important for understanding the
composition of the present-day interstellar medium (ISM) and of our solar
system. In this paper, we aim to track the GCE by using the 29Si/30Si ratios in
evolved stars and tentatively relate this to presolar grain composition. We
used the APEX telescope to detect thermal SiO isotopologue emission toward four
oxygen-rich M-type stars. Together with the data retrieved from the Herschel
science archive and from the literature, we were able to obtain the 29Si/30Si
ratios for a total of 15 evolved stars inferred from their optically thin 29SiO
and 30SiO emission. These stars cover a range of masses and ages, and because
they do not significantly alter 29Si/30Si during their lifetimes, they provide
excellent probes of the ISM metallicity (or 29Si/30Si ratio) as a function of
time. The 29Si/30Si ratios inferred from the thermal SiO emission tend to be
lower toward low-mass oxygen-rich stars (e.g., down to about unity for W Hya),
and close to an interstellar or solar value of 1.5 for the higher-mass carbon
star IRC+10216 and two red supergiants. There is a tentative correlation
between the 29Si/30Si ratios and the mass-loss rates of evolved stars, where we
take the mass-loss rate as a proxy for the initial stellar mass or current
stellar age. This is consistent with the different abundance ratios found in
presolar grains. We found that older objects (up to possibly 10 Gyr old) in our
sample trace a previous, lower 29Si/30Si value of about 1. Material with this
isotopic ratio is present in two subclasses of presolar grains, providing
independent evidence of the lower ratio. Therefore, the 29Si/30Si ratio derived
from the SiO emission of evolved stars is a useful diagnostic tool for the
study of the GCE and presolar grains.Comment: 7 pages, 4 figure
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