9,942 research outputs found
Non-invariant two-loop counterterms for the three-gauge-boson vertices
Some practical applications of algebraic renormalization are discussed. In
particular we consider the two-loop QCD corrections to the three-gauge-boson
vertices involving photons, Z and W bosons. For this purpose also the
corresponding two-point functions have to be discussed. A recently developed
procedure is used to analyze the breaking terms of the functional identities
and explicit formulae for the universal counterterms are provided. Special
attention is devoted to the treatment of infra-red divergences.Comment: Some minor corrections and improved discussion in the one-loop
sectio
Duration Dependence and Heterogeneity: Learning from Early Notice of Layoff
This paper presents a novel approach to distinguish the impact of
duration-dependent forces and adverse selection on the exit rate from
unemployment by leveraging variation in the length of layoff notices. I
formulate a Mixed Hazard model in discrete time and specify the conditions
under which variation in notice length enables the identification of structural
duration dependence while allowing for arbitrary heterogeneity across workers.
Utilizing data from the Displaced Worker Supplement (DWS), I employ the
Generalized Method of Moments (GMM) to estimate the model. According to the
estimates, the decline in the exit rate over the first 48 weeks of unemployment
is largely due to the worsening composition of surviving jobseekers.
Furthermore, I find that an individual's likelihood of exiting unemployment
decreases initially, then increases until unemployment benefits run out, and
remains steady thereafter. These findings are consistent with a standard search
model where returns to search decline early in the spell
CAPA: Quality Control Testing of Laboratory Plates
Abstract
The purpose of a Corrective and Preventive Action (CAPA) investigation is to identify and address errors, deviations, and compliance issues to ensure the integrity, reliability, and quality of research and biomanufacturing. In the biotech industry, where identifying and rectifying root causes of errors is key to ensuring quality data and preventing future errors, CAPA plays a crucial role. The Jefferson Biotechnology (JBT) lab was asked to investigate the sterility of a biotech supplier’s microbiological agar plates, when a client reported contamination in their agar plates, suspecting contamination prior to sleeve opening. By attempting to reproduce our client\u27s results through a CAPA investigation, the JBT lab was able to confirm that the client\u27s plates were not contaminated prior to usage. This validation persuaded the client to implement JBT\u27s advice on aseptic techniques, thereby reducing the risk of unnecessary errors in microbiological handling and offering valuable guidance for future preventive measures
rps medical science
RPS Medical science bagi mahasiswa semester VI Prodi DIV Kebidanan TA.2016/201
RPS / SILABUS EBM
RPS/SILBUS MATA KULIAH EBM BAGI MAHASISWA SEMESTER VI KELAS REGULER TA 2016/2017 PRODI DIV KEBIDANA
New Deformation Twinning Mechanism Generates Zero Macroscopic Strain In Nanocrystalline Metals
Macroscopic strain was hitherto considered a necessary corollary of deformation twinning in coarse-grained metals. Recently, twinning has been found to be a preeminent deformation mechanism in nanocrystalline face-centered-cubic (fcc) metals with medium-to-high stacking fault energies. Here we report a surprising discovery that the vast majority of deformation twins in nanocrystalline Al, Ni, and Cu, contrary to popular belief, yield zero net macroscopic strain. We propose a new twinning mechanism, random activation of partials, to explain this unusual phenomenon. The random activation of partials mechanism appears to be the most plausible mechanism and may be unique to nanocrystalline fcc metals with implications for their deformation behavior and mechanical properties
Impact Forecasting to Support Emergency Management of Natural Hazards
Forecasting and early warning systems are important investments to protect lives, properties, and livelihood. While early warning systems are frequently used to predict the magnitude, location, and timing of potentially damaging events, these systems rarely provide impact estimates, such as the expected amount and distribution of physical damage, human consequences, disruption of services, or financial loss. Complementing early warning systems with impact forecasts has a twofold advantage: It would provide decision makers with richer information to take informed decisions about emergency measures and focus the attention of different disciplines on a common target. This would allow capitalizing on synergies between different disciplines and boosting the development of multihazard early warning systems. This review discusses the state of the art in impact forecasting for a wide range of natural hazards. We outline the added value of impact-based warnings compared to hazard forecasting for the emergency phase, indicate challenges and pitfalls, and synthesize the review results across hazard types most relevant for Europe
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