53,571 research outputs found
Odd-primary homotopy exponents of compact simple Lie groups
We note that a recent result of the second author yields upper bounds for
odd-primary homotopy exponents of compact simple Lie groups which are often
quite close to the lower bounds obtained from v_1-periodic homotopy theory.Comment: This is the version published by Geometry & Topology Monographs on 22
February 200
Introduction to MAC CRM training
The author introduces the Military Airlift Command (MAC) and its mission. A brief history of Cockpit Resource Management (CRM) as it relates to MAC is given. He also states why MAC is currently interested in CRM
CPAs\u27 Perceptions of the Impact of SAS 99
In November 2002, the Auditing Standards Board (ASB) issued Statement on Auditing Standard 99, Consideration of Fraud in a Financial Statement Audit. Although SAS 99 was developed before the recent accounting scandals, its release came in their wake. The ASB crafted SAS 99 in response to perceived inadequacies in its predecessor, SAS 82. A questionnaire was sent to a random sample of 300 Wisconsin CPAs selected from the membership of the Wisconsin Institute of CPAs, which included 150 partners and 150 managers from Wisconsin public accounting firms. The response rate was 35%, with an almost equal balance of partners and managers. Respondents were asked to rate each of the 29 statements in the questionnaire on a scale from 1 to 5, with 1 representing that the respondent strongly agreed with the statement, while 5 represented that the respondent strongly disagreed. If any significant differences existed between the responses provided by the partners and by the managers, a statistical t-test was conducted for each question. The results were grouped and presented in the following five categories: 1. auditor responsibility, 2. client interaction and public opinion, 3. fraud risk factors and audit effectiveness, 4. workpaper documentation, and 5. audit procedures. Results of the poll are presented
Southern California partyboat sampling study Quarterly Report no. 3
During the period January 1 to March 31, 1976, Department
personnel made 139 sampling trips aboard southern California partyboats. A total of 22,122 fishes from 73 species was identified and measured.
Otoliths were removed from 1,536 rockfish carcasses representing 31 species for use in age determination.
Sampling personnel tagged and released 68 California
barracuda, Sphyraena argentea, and 18 sablefish, Anoplopoma
fimbria.
The five most common species sampled during this period
represented approximately 79% of the total number of fishes
measured. These were, in order of importance; bocaccio,
Sebastes paucispinis; chilipepper, Sebastes goodei; olive
rockfish, Sebastes serranoides; greenspotted rockfish,
Sebastes chlorostictus; and vermilion rockfish, Sebastes
miniatus. Bocaccio alone accounted for 52% of the sampled
catch. (15pp.
Space Station Freedom solar array panels plasma interaction test facility
The Space Station Freedom Power System will make extensive use of photovoltaic (PV) power generation. The phase 1 power system consists of two PV power modules each capable of delivering 37.5 KW of conditioned power to the user. Each PV module consists of two solar arrays. Each solar array is made up of two solar blankets. Each solar blanket contains 82 PV panels. The PV power modules provide a 160 V nominal operating voltage. Previous research has shown that there are electrical interactions between a plasma environment and a photovoltaic power source. The interactions take two forms: parasitic current loss (occurs when the currect produced by the PV panel leaves at a high potential point and travels through the plasma to a lower potential point, effectively shorting that portion of the PV panel); and arcing (occurs when the PV panel electrically discharges into the plasma). The PV solar array panel plasma interaction test was conceived to evaluate the effects of these interactions on the Space Station Freedom type PV panels as well as to conduct further research. The test article consists of two active solar array panels in series. Each panel consists of two hundred 8 cm x 8 cm silicon solar cells. The test requirements dictated specifications in the following areas: plasma environment/plasma sheath; outgassing; thermal requirements; solar simulation; and data collection requirements
Scattered-light scanner measurements of cryogenic liquid-jet breakup
The effect of highly turbulent Mach 1 gas flow and high thermal gradients on drop size measurements was investigated with a scattered light scanner. The instrument, developed at NASA-Lewis, was used to measure characteristic drop diameters or cyrogenic liquid sprays. By correcting for gas turbulence and thermal gradient affects, it was possible to obtain good reproducible data with the scattered light scanner. Tests were conducted primarily in the aerodynamic-stripping regime of liquid atomization and it was found that the loss of small droplets due to vaporization and dispersion had a marketed effect on drop size measurements. The nitrogen gas flow rate exponent of 1.33 is the same as that predicted by atomization theory for liquid jet breakup in high velocity gas flow. However, when the sprays were sampled farther downstream of the atomizer, at axial distances of 2.5 and 4.5 cm, the exponent for W sub n decreased 1.2 and 0.9, respectively. This was attributed to the loss of small droplets due to vaporization when values of downstream axial distances exceeded 1.3 cm
Scaling results for the Liquid Sheet Radiator (LSR)
Surface tension forces at the edges of a thin liquid (approx. 100 micrometers) sheet flow result in a triangularly shaped sheet. Such a geometry is ideal for an external flow radiator. The experimental investigation of such sheet flows was extended to large sheets (width = W = 23.5 cm, length = L approx. = 3.5 m). Experimental L/W results are greater than the calculated results. However, more experimental results are necessary for a complete comparison. The calculated emissivity of a sheet of Dow-Corning 705 silicone oil, which is a low temperature (300 to 400K) candidate for a liquid sheet radiator (LSR), is greater than .8 for sheet thicknesses greater than 100 micrometers
Experimental tests of reaction rate theory: Mu+H2 and Mu+D2
Copyright @ 1987 American Institute of Physics.Bimolecular rate constants for the thermal chemical reactions of muonium (Mu) with hydrogen and deuterium—Mu+H2→MuH+H and Mu+D2→MuD+D—over the temperature range 473–843 K are reported. The Arrhenius parameters and 1σ uncertainties for the H2 reaction are log A (cm3 molecule-1 s-1)=-9.605±0.074 and Ea =13.29±0.22 kcal mol-1, while for D2 the values are -9.67±0.12 and 14.73±0.40, respectively. These results are significantly more precise than those reported earlier by Garner et al. For the Mu reaction with H2 our results are in excellent agreement with the 3D quantum mechanical calculations of Schatz on the Liu–Siegbahn–Truhlar–Horowitz potential surface, but the data for both reactions compare less favorably with variational transition-state theory, particularly at the lower temperatures.NSERC (Canada) and the Petroleum Research Foundation of the Americal Chemical Society
Distributions associated with general runs and patterns in hidden Markov models
This paper gives a method for computing distributions associated with
patterns in the state sequence of a hidden Markov model, conditional on
observing all or part of the observation sequence. Probabilities are computed
for very general classes of patterns (competing patterns and generalized later
patterns), and thus, the theory includes as special cases results for a large
class of problems that have wide application. The unobserved state sequence is
assumed to be Markovian with a general order of dependence. An auxiliary Markov
chain is associated with the state sequence and is used to simplify the
computations. Two examples are given to illustrate the use of the methodology.
Whereas the first application is more to illustrate the basic steps in applying
the theory, the second is a more detailed application to DNA sequences, and
shows that the methods can be adapted to include restrictions related to
biological knowledge.Comment: Published in at http://dx.doi.org/10.1214/07-AOAS125 the Annals of
Applied Statistics (http://www.imstat.org/aoas/) by the Institute of
Mathematical Statistics (http://www.imstat.org
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