The Penn World Tables (PWT) are an important data source for cross-country comparisons. The PWT have undergone several revisions over time and due to these revisions, some well-received evidence based on one version of the PWT may not survive when another version of the data is used. This paper explores such a possibility. Using four publicly available versions of the PWT, we first examine how ...

We develop a novel photoelectron linear accelerator using a plane wave transformer (PWT) design [1]. In this design the input RF power is coupled to the accelerating cavities via a large concentric manifold cavity. The scheme makes possible very strong coupling between the accelerating cells, and relaxes manufacturing tolerances. The compact photoelectron linac integrates a photocathode directl...

A close relationship exists between regional myocardial blood flow (RMBF) and function during acute coronary inflow restriction (perfusion-contraction matching). However, the relationship of flow and function during coronary microvascular obstruction is unknown. In 12 anesthetized dogs, the left circumflex coronary artery was perfused from an extracorporeal circuit. After control measurements, ...

BACKGROUND Oral therapies and chemodenervation procedures are often unrewarding in the treatment of focal, task-specific hand disorders such as writer's cramp or primary writing tremor (PWT). METHODS A portable writing orthotic device (WOD) was evaluated on 15 consecutively recruited writer's cramp and PWT subjects. We measured overall impairment at baseline and after 2 weeks of at-home use w...

BACKGROUND The measurement of mechanosensitivity is a key method for the study of pain in animal models. This is often accomplished with the use of von Frey filaments in an up-down testing paradigm. The up-down method described by Chaplan et al. (J Neurosci Methods 53:55-63, 1994) for mechanosensitivity testing in rodents remains one of the most widely used methods for measuring pain in animals...

This paper sheds light on two problems in the Penn World Table (PWT) GDP estimates. First,we show that these estimates vary substantially across different versions of the PWT despitebeing derived from very similar underlying data and using almost identical methodologies; thatthis variability is systematic; and that it is intrinsic to the methodology deployed by the PWT toest...

A Plane-Wave-Transformer (PWT), integrated photoinjector operating at an X-band frequency (8.547GHz) is being developed by DULY Research Inc. in a DOE SBIR project, in collaboration with UCLA and UCD/ILSA. Upward frequency scaling from an S-band PWT photoinjector would result in a compact photoinjector with unprecedented brightness. Challenging technological innovations are required at X-band. ...

The aim of this study was to examine the role played by substance P and calcitonin gene-related peptide (CGRP) within the dorsal horn of the spinal cord in engagement of antinociception evoked by dexmedetomidine (DEX). Paw withdrawal threshold (PWT) to mechanical stimulation was determined after chronic intrathecal infusion of DEX and enzyme-linked immunosorbent assay (ELISA) was employed to ex...

It has become increasingly apparent that the pain threshold of females and males varies in an estrogen dependent manner. To investigate the modulation of pain by estrogen and the molecular mechanisms involved in this process. A total of 48 rats were ovariectomized (OVX). At 14 and 20 days after OVX, rats were divided into eight groups: groups 1-4 were administered drugs intravenously (IV); grou...

We report on the initial operation of a novel compact rf linac — the plane wave transformer (PWT). The PWT is a 42 cm long, 8 cell standing-wave structure, operated at Sband, in a π−mode. We present the properties of this linac at rf power levels from 4 MW to 8 MW and beam energy from 7 MeV to 10 MeV, measured initially using both dark current and photo-electrons. Some technical issues associat...