4,303 research outputs found
A study of poultry processing plant noise control techniques
A number of techniques can be used to reduce noise in poultry processing plants. In general, covering the ceiling with a noise-absorbing medium is a practical first step. Once the reflected noise levels are abated, treatment of specific identifiable noise courses can take place. The development, flammability, and mechanical properties of acoustic panels to be vertically suspended from the ceiling are discussed as well as the covers need to comply with USDA cleanability requirements. The isolation of drive motors and pumps from large expansive areas, the muffling of pneumatic devices, and the insulation of ice chutes are methods of source quieting. Proper maintenance of machinery and vibration monitoring are also needed to reduce hearing damage risk and to improve worker productivity and employee/supervisor relations
Body temperatures in two brazilian primates
O ciclo de temperatura corpórea diário do saguà Callithrix jacchus (4 o) tem uma amplitude de 4,3ºC, cêrca de 2 vêzes a observada em outros primatas e mais elevada em qualquer outro mamÃfero. O máximo foi à s 9,30 horas (39,7 mais ou menos 0,98º) e o mÃnimo foi à s 1,30 horas (35,4 mais ou menos 0,4º
Preliminary sonic boom correlation of predicted and measured levels for STS-1 entry
A preliminary analysis correlating peaks from sonic boom pressure signatures recorded during the descent trajectory of the Orbiter Columbia, which landed in the dry lake bed at Edwards Air Force Base (EAFB), California, with measured wind tunnel signatures extrapolated from flight altitudes to the ground has been made for Mach numbers ranging from 1.3 to 6. The flight pressure signatures were recorded by microphones positioned at ground level near the groundtrack, whereas the wind tunnel signatures were measured during a test of a 0.0041-scale model Orbiter. The agreement between overpressure estimates based on wind tunnel data using preliminary flight trajectory data and oscillograph traces from ground measurements appears reasonable at this time for the range of Mach numbers considered. More detailed studies using final flight trajectory data and digitized ground measured data will be performed
Effects of Horizontal-tail Position and a Wing Leading-edge Modification Consisting of a Full-span Flap and a Partial-span Chord-extension on the Aerodynamic Characteristics in Pitch at High Subsonic Speeds of a Model with a 45 Degree Sweptback Wing
Effects of horizontal-tail height and a wing leading-edge modification consisting of a full-span flap and a partial-span chord-extension on the aerodynamic characteristics in pitch at high subsonic speeds of a model with a 45 degree sweptback wing
Brief of Amici Curiae Administrative Law Scholars in Support of Petitioner in SEC v. Jarkesy
This is an amicus brief that several scholars have filed in the Supreme Court in SEC v. Jarkesy. The brief argues that (1) the double-for-cause removal requirement of Free Enterprise Fund v. PCAOB should not apply to ALJs at the SEC; and (2) the Seventh Amendment does not apply to administrative adjudication at the SEC
Flux-dynamics associated with the Second Magnetisation Peak in iron-pnictide Ba_{1-x}K_xFe_2As_2
We report on isofield magnetic relaxation data on a single crystal of
with superconducting transition temperature = 32.7 K
which exhibit the so called fish-tail effect. A surface map of the
superconducting transition temperature shows that the superconducting
properties are close to homogeneous across the sample. Magnetic relaxation
data, M(t), was used to obtain the activation energy U(M) in order to study
different vortex dynamics regimes. Results of this analysis along with time
dependent measurements as a function of field and temperature extended to the
reversible region of some M(H) curves demonstrate that the irreversibility as
well the second magnetization peak position, , are time dependent and
controlled by plastic motion of the vortex state. In the region delimited by a
characteristic field Hon (well below ), and , the vortex dynamics is
controlled by collective pinning. For fields below Hon the activation energy,
, increases with field as expected for collective pinning, but the pinning
mechanism is likely to be in the single vortex limit.Comment: 8 pages, 8 figures, one tabl
Supreme Court Brief Amicus Curiae of Administrative Law Scholars in Support of Neither Party
This brief on behalf of 29 administrative law scholars takes no position on whether Administrative Law Judges (ALJs) are employees or inferior officers. It urges the Court to issue an opinion that respects the decision that Congress made unanimously in 1946 to enact numerous statutory safeguards that assure that ALJs have decisional independence from the agencies where they work while assuring that agencies retain control over the policy content and legal basis for any decision made in an adjudication in which an ALJ presides.
The brief describes the fifteen years of study and deliberation that led to the unanimous decision of Congress to enact the Administrative Procedure Act (APA) in 1946. It describes the particular attention that Congress devoted to the critical task of providing ALJs with the combination of statutory safeguards that minimize the risk that they will favor the agencies for whom they adjudicate cases while assuring that the agencies retain control of the policy content of any decision made in such an adjudication. It then describes the series of opinions the Supreme Court issued during the 1950s in which the Justices unanimously praised the provisions of the APA that assure that ALJs conduct adjudicatory hearings in an unbiased manner, explained the importance of those statutory provisions in protecting the values reflected in the Due Process Clause, and urged Congress to make those safeguards applicable to all agency adjudications. It concludes by urging the Court to issue an opinion that respects the decision that Congress made in 1946 to insulate ALJs from potential sources of pro-agency bias by including in the APA a combination of provisions that confer decisional independence on ALJs
On nonsupersymmetric \BC^4/\BZ_N, tachyons, terminal singularities and flips
We investigate nonsupersymmetric \BC^4/\BZ_N orbifold singularities using
their description in terms of the string worldsheet conformal field theory and
its close relation with the toric geometry description of these singularities
and their possible resolutions. Analytic and numerical study strongly suggest
the absence of nonsupersymmetric Type II terminal singularities (i.e. with no
marginal or relevant blowup modes) so that there are always moduli or closed
string tachyons that give rise to resolutions of these singularities, although
supersymmetric and Type 0 terminal singularities do exist. Using gauged linear
sigma models, we analyze the phase structure of these singularities, which
often involves 4-dimensional flip transitions, occurring between resolution
endpoints of distinct topology. We then discuss 4-dim analogs of unstable
conifold-like singularities that exhibit flips, in particular their Type II GSO
projection and the phase structure. We also briefly discuss aspects of
M2-branes stacked at such singularities and nonsupersymmetric AdS_4\times
S^7/\BZ_N backgrounds.Comment: Latex, 43pgs incl. appendices, 2 eps figs, v2. minor clarifications
added, to appear in JHE
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