in a recent paper in this journal, yang et al. [feng yang, dexiang wu,liang liang, gongbing bi & desheng dash wu (2009), supply chaindea:production possibility set and performance evaluation model] definedtwo types of supply chain production possibility set which were proved to beequivalent to each other. they also proposed a new model for evaluatingsupply chains. there are, however, some short...

In this commentary, we establish a relationship between medical sociology and the study of medical tourism and cross-border healthcare by introducing Ronald Andersen’s behavioral model of healthcare use, and linking this model to the recent empirical study of Kovacs et al. on patients travelling to Hungary for orthopedic treatment. Finally, we plead for more measurement in the field of patient ...

Variable selection via penalized estimation is appealing for dimension reduction. For penalized linear regression, Efron, et al. (2004) introduced the LARS algorithm. Recently, the coordinate descent (CD) algorithm was developed by Friedman, et al. (2007) for penalized linear regression and penalized logistic regression and was shown to gain computational superiority. This paper explores...

Nuclear pore complexes (NPCs) provide the sole gateway for the exchange of material between nucleus and cytoplasm of interphase eukaryotic cells. They support two modes of transport: passive diffusion of ions, metabolites and intermediate-sized macromolecules, and facilitated, receptor-mediated translocation of proteins, RNA, and RNPs complexes. It is generally assumed that both modes of transp...

1) From the Department of Biochemistry, Albert Einstein College of Medicine, 1300 Morris Park Avenue, Bronx, NY 10461, USA 2) Department of Cell Biology, Harvard Medical School, 240 Longwood Avenue, Boston, MA 10115, USA 3) present address: Kavli Institute of NanoScience, Department of BioNanoScience, Technical University Delft, Lorentzweg , 2628 CJ Delft, The Netherlands 4) present address: De...

ATP-BINDING CASSETTE TRANSPORTER A1 MEDIATES THE BENEFICIAL EFFECTS OF THE LIVER-X-RECEPTOR AGONIST GW3965 ON OBJECT RECOGNITION MEMORY AND AMYLOID BURDEN IN APP/PS1 MICE James J. Donkin, Sophie Stukas, Veronica Hirsch-Reinshagen, Dhananjay Namjoshi, Anna Wilkinson, Sharon May, Jeniffer Chan, Jianjia Fan, Jon Collins, and Cheryl L. Wellington From Department of Pathology and Laboratory Medicine...

The reading for Friday’s class is a seminal wireless research paper. What makes this paper especially interesting experimentally is that while it is astoundingly careful, deep, and complete, ultimately one of the major conclusions of the paper turns out to be incorrect. Furthermore, this error is due to a mistake in the experimental methodology. This document explains the error and provides eno...

Daily milk records of 88 cows in a multibreed dairy herd were used to describe lactation curves and test the ability of seven models to predict daily milk yields, and accumulated 100-d and 305-d milk yields. The seven mathematical models were a gamma function, a mixed log second-degree polynomial model, and five polynomial regression models. Cows were of three breed groups: Holstein Friesian (H...