Página 1 dos resultados de 41 itens digitais encontrados em 0.007 segundos

## Methodology to reduce cancellations of scheduled

Vaz, Clara B.
Fonte: Instituto Politécnico de Bragança Publicador: Instituto Politécnico de Bragança
Tipo: Conferência ou Objeto de Conferência
Português
Relevância na Pesquisa
17.259888%
Purpose - This study presents an integrated methodology to support the logistics management in health facilities in waste reduction and elimination, by providing simple and low cost solutions to minimize the cancellation of scheduled surgeries. The methodology is applied in a Portuguese public hospital. This approach promotes and improves the quality of services to patients. Design/methodology/approach - The methodology is a problem-solving process which could be applied to manage the flows of services (and materials), and associated information, from the point of origin to the point of care. This approach integrates several stages such as definition, measurement, analysis, improvement and control (DMAIC), and uses the quality and management tools required to obtain efficient and effective solutions to patients. Findings - The enhanced methodology contributes to an understanding the origins of the difficulties and waste. For the case study, the cancellation rate ranges from 19% and 21% in 2011 and 2012, respectively, and increases to 29% in 2013, although, this year the operating room performed the highest number of operations. The most critical root causes of cancellations are related to the changing patient’s state of health...

## Amplitude Cancellation of Motor-Unit Action Potentials in the Surface Electromyogram Can Be Estimated With Spike-Triggered Averaging

Farina, Dario; Cescon, Corrado; Negro, Francesco; Enoka, Roger M.
Fonte: American Physiological Society Publicador: American Physiological Society
Tipo: Artigo de Revista Científica
Português
Relevância na Pesquisa
27.810398%
The study presents analytical, simulation, and experimental analyses of amplitude cancellation of motor-unit action potentials (APs) in the interference electromyogram (EMG) and its relation to the size of the spike-triggered average (STA) EMG. The amount of cancellation of motor-unit APs decreases monotonically as a function of the ratio between the root mean square (RMS) of the motor-unit AP and the RMS of the interference EMG signal. The theoretical derivation of this association indicates a method to measure cancellation in individual motor units by STA of the interference and squared EMGs. The theoretical relation was examined in both simulated EMG signals generated by populations of 200 motor units and experimental recordings of 492 and 184 motor-unit APs in the vastus medialis and abductor digiti minimi muscles, respectively. Although the theoretical relation predicted (R2 = 0.95; P < 0.001) the amount of cancellation in the simulated EMGs, the presence of motor-unit synchronization decreased the strength of the association for small APs. The decrease in size of the STA obtained from the squared EMG relative to that extracted from the interference EMG was predicted by the experimental measure of cancellation (R2 = 0.65; P < 0.001...

## Respiratory manganese particle size, time-course and neurobehavioral outcomes in workers at a manganese alloy production plant

Park, Robert M.; Bouchard, Maryse F.; Baldwin, Mary; Bowler, Rosemarie; Mergler, Donna
Tipo: Artigo de Revista Científica
Português
Relevância na Pesquisa
17.543071%
The progression of manganism with chronic exposure to airborne manganese (Mn) is not well understood. Here, we further investigate the findings on exposure and neurobehavioral outcomes of workers from a silico- and ferromanganese production plant and non-exposed workers from the same community in 1990 and 2004, using a variety of exposure metrics that distinguish particle size and origin within the range of respirable airborne exposures. Mn exposure matrices for large respirable particulate (Mn-LRP, dust) and small respirable particulate (Mn-SRP, fume), based on process origins, were used together with detailed work histories since 1973 (plant opening), to construct exposure metrics including burdens and cumulative burdens with various clearance half-lives. For three out of eight 1990 neurobehavioral tests analyzed with linear regression models, duration of Mn exposure was the best predictor: Luria-Nebraska Neuropsychological Battery – Motor Scale, Trail-Making B and Finger Tapping. The Luria-Nebraska Motor Scale had the strongest association (t ~ 5.0, p < 10−6). For outcomes on three other tests, the duration and Mn-SRP metrics were comparable: Trail Making Test A, Cancellation H and Stroop Color-Word Test (color/word subtest). Delayed Word Recall was best predicted by Mn-SRP (based on square root or truncated air-concentrations). The Word score on the Stroop Color-Word Test was the only outcome for which Mn-LRP was the leading predictor (t = −2.92...

## Essays on Asset Pricing and Econometrics

Jin, Tao
Fonte: Harvard University Publicador: Harvard University
Tipo: Thesis or Dissertation
Português
Relevância na Pesquisa
26.849507%
This dissertation presents three essays on asset pricing and econometrics. The first chapter identifies rare events and long-run risks simultaneously from a rich data set (the Barro-Ursua macroeconomic data set) and evaluates their contributions to asset pricing in a unified framework. The proposed model of rare events and long-run risks is estimated using a Bayesian Markov-chain Monte-Carlo method, and the estimates for the disaster process are closer to the data than those in the previous studies. Major evaluation results in asset pricing include: (1) for the unleveraged annual equity premium, the predicted values are 4.8%, 4.2%, and 1.0%, respectively; (2) for the Sharpe ratio, the values are 0.72, 0.66, and 0.15, respectively.; Economics

## Flow and noise associated with the interaction of a square cylinder with a downstream flat plate.

Mat Ali, Mohamed Sukri
Relevância na Pesquisa
27.474849%
Bluff bodies are commonly found in many engineering applications, such as aircraft landing gear, pantograph systems of high speed trains and the rear view mirrors of passengers cars. In the event of bluff body interaction with flow, various flow induced phenomena may occur, such as vibration, unsteady aerodynamic loading, high pressure drag and flow induced noise. These phenomena can be altered by locating a secondary body in the wake of, and close to the bluff body. This alteration is due to the modification of the bluff body wake structure by the secondary body. The main objective of this study is to investigate the possibility of using a downstream flat plate for passive bluff body wake control. The success of this mechanism is evaluated by considering the reduction in unsteady aerodynamic loading together with the reduction in sound pressure level at an observer location. The observed new flow structures are explained using the results from a wide range of wake analyses to obtain a clear understanding of the physical phenomena of the wake-plate interaction. The test case under investigation consists of a square cylinder as the primary bluff body and a flat plate as the secondary body. The plate length and its position downstream of the square cylinder are varied systematically. This allows the optimal configuration of the plate for the least aerodynamic loading and radiated sound to be determined. The flow is simulated using two-dimensional Direct Numerical Simulation (DNS) at a Reynolds number of 150...

## On the Modified Selberg Integral

Coppola, Giovanni
Tipo: Artigo de Revista Científica
Relevância na Pesquisa
26.849507%

## An efficient square-root algorithm for BLAST

Hassibi, Babak
Tipo: Book Section; PeerReviewed Formato: application/pdf