1,740 research outputs found
A Globally Flexible, Quadratic Almost Ideal Demand System: An Application for Meat Demand in Taiwan
A new demand system, combining the quadratic almost ideal demand system and the Fourier expenditure system, is introduced. An application for meat consumption in Taiwan indicates that the new demand system fits the data well and that the restriction to the usual specifications, such as locally flexible functional form, linear Engel curve, and both, are rejected.Food Consumption/Nutrition/Food Safety,
Analysis of nonlinear dynamic behavior and pull-in prediction of micro circular plate actuator
The dynamic behavior of micro circular plate electrostatic devices is not easily analyzed using traditional methods such as perturbation theory or Galerkin approach method due to the complexity of the interactions among the electrostatic coupling effect, the residual stress and the nonlinear electrostatic force. Accordingly, the present study proposes a approach for analyzing the dynamic response of such devices using a hybrid numerical scheme comprising the differential transformation method and the finite difference method. The feasibility of the proposed approach is demonstrated by modeling the dynamic response of a micro circular plate actuated by a DC voltage. The numerical results for the pull-in voltage are found to deviate by no more than 0.27 % from those derived in the literature using various computational methods. Thus, the basic validity of the hybrid numerical scheme is confirmed. Moreover, the effectiveness of a combined DC/AC loading scheme in driving the micro circular actuator is examined. It is shown that the use of an AC actuating voltage in addition to the DC driving voltage provides an effective means of tuning the dynamic response of the micro circular plate
Note on a Single-Machine Scheduling Problem with Sum of Processing Times Based Learning and Ready Times
In the recent 20 years, scheduling with learning effect has received considerable attention. However, considering the learning effect along with release time is limited. In light of these observations, in this paper, we investigate a single-machine problem with sum of processing times based learning and ready times where the objective is to minimize the makespan. For solving this problem, we build a branch-and-bound algorithm and a heuristic algorithm for the optimal solution and near-optimal solution, respectively. The computational experiments indicate that the branch-and-bound algorithm can perform well the problem instances up to 24 jobs in terms of CPU time and node numbers, and the average error percentage of the proposed heuristic algorithm is less than 0.5%
Construct validity of the Depression and Somatic Symptoms Scale: evaluation by Mokken scale analysis
A reduced risk of stroke with lithium exposure in bipolar disorder: a population‐based retrospective cohort study
Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/115969/1/bdi12336.pdfhttp://deepblue.lib.umich.edu/bitstream/2027.42/115969/2/bdi12336_am.pd
Major interventions are associated with survival of out of hospital cardiac arrest patients - a population based survey
Background. The overall survival rate of
out-of-hospital cardiac arrest (OHCA)
in Taiwan or even in the whole of Asia
is relatively low. Major interventions,
such as target temperature management
(TTM), coronary artery angiography, and
extracorporeal membrane oxygenation
(ECMO), have been associated with better
patient outcome. However, studies in Taiwan
revealing evidence of the benefits of
these interventions are limited.
Methods. A population-based study used
an 8-year database to analyze overall survival
and risk factors ˝among OHCA patients.
All adult non-trauma OHCA patients
were identified through diagnostic
and procedure codes. Hospital survival
and return of spontaneous circulation
(ROSC) were primary and secondary outcomes.
Logistic regression and Cox regression
analyses were conducted.
Results. There was a relationship between
major interventions (including TTM,
coronary artery angiography, and ECMO)
and better hospital survival. Age, income,
major interventions, and acute myocardial
infarction history were associated with
hospital survival. The adjusted hazard
ratios (HRs) were 0.406 (95% CI, 0.295
to 0.558), 1.109 (95% CI, 1.027 to 1.197),
1.075 (95% CI, 1.002 to 1.154), 1.097 (95%
CI, 1.02 to 1.181) and 0.799(95% CI, 0.677
to 0.942) for patients with major interventions,
age≥50, medium low and low income,
middle income, and acute myocardial
infarction history, respectively.
Conclusion. This population-based study
in Taiwan revealed that older age (≥50),
medium low and low income were associated
with a lower rate of survival. Major
interventions, including TTM, coronary
angiography, and ECMO, were related to
better survival
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