Results 91 to 100 of about 44,546 (316)

The Full Cost of Intercity Highway Transportation [PDF]

In this paper we review the theoretical and empirical literature on the cost structure of the provision of intercity highway transportation and specify and estimate our own cost functions .
David Gillen, David Levinson
core  

Extremely low-frequency magnetic field exposure level for Koreans by occupational code

Emerging Contaminants, 2018
This study attempted to identify the level of exposure of 350 subjects to the extremely low-frequency magnetic field (ELF-MF). The occupational group showed significantly high levels of ELF-MF in every exposure indicator during work and transportation (p 
Joon Sig Jung, Mailan Arachchige Don Rajitha Kawshalya, In Keun Shim, Jung Min Ryu, Myung Hee Kwon, Duck Shin Park, Seung Cheol Hong   +6 more
doaj   +1 more source

Sex‐Stratified Association of Regional Dopamine Transporter Binding With Disease Progression in Amyotrophic Lateral Sclerosis

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective To clarify the clinical relevance of dopamine transporter single‐photon emission computed tomography (DAT‐SPECT) abnormalities in amyotrophic lateral sclerosis (ALS), with a prespecified focus on sex‐stratified associations with disease progression and short‐term prognosis.
Tomoya Kawazoe, Keizo Sugaya, Kentaro Hayashi, Keiko Hino, Yasuhiro Nakata, Kota Bokuda, Toshio Shimizu, Kazushi Takahashi   +7 more
wiley   +1 more source

Neurochemical Endpoints to Inform Early‐Stage Trials of Spinocerebellar Ataxia 2 and 3 in a Multisite Setting

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Neurochemical levels measured by brain MR spectroscopy (MRS) have been proposed as endpoints for clinical trials in early‐stage spinocerebellar ataxia (SCA) trials. We tested their trial‐readiness by quantifying neurochemicals in three affected brain regions in early‐stage cohorts of SCA2 and SCA3, examining their reproducibility in ...
James M. Joers, Yaqiao Wei, Dinesh K. Deelchand, Adam Berrington, Young Woo Park, Guita Banan, Michal Povazan, Jens T. Rosenberg, André J. W. van der Kouwe, Tetsuo Ashizawa, Khalaf O. Bushara, Chiadi U. Onyike, Sub H. Subramony, Jeremy D. Schmahmann, Brian J. Soher, Peter B. Barker, Thomas H. Mareci, Eva‐Maria Ratai, Lynn E. Eberly, Gülin Öz   +19 more
wiley   +1 more source

Residential exposure to transportation noise and risk of incident atrial fibrillation: a pooled study of 11 prospective Nordic cohortsResearch in context

The Lancet Regional Health. Europe
Summary: Background: Transportation noise has been linked with cardiometabolic outcomes, yet whether it is a risk factor for atrial fibrillation (AF) remains inconclusive. We aimed to assess whether transportation noise was associated with AF in a large,
Jesse D. Thacher, Nina Roswall, Mikael Ögren, Andrei Pyko, Agneta Åkesson, Anna Oudin, Annika Rosengren, Aslak H. Poulsen, Charlotta Eriksson, David Segersson, Debora Rizzuto, Emilie Helte, Eva M. Andersson, Gunn Marit Aasvang, Gunnar Engström, Hrafnhildur Gudjonsdottir, Jenny Selander, Jesper H. Christensen, Jørgen Brandt, Karin Leander, Kim Overvad, Kristoffer Mattisson, Kristina Eneroth, Lara Stucki, Lars Barregard, Leo Stockfelt, Maria Albin, Mette K. Simonsen, Ole Raaschou-Nielsen, Pekka Jousilahti, Pekka Tiittanen, Petter L.S. Ljungman, Steen S. Jensen, Susanna Gustafsson, Tarja Yli-Tuomi, Thomas Cole-Hunter, Timo Lanki, Youn-Hee Lim, Zorana J. Andersen, Göran Pershagen, Mette Sørensen   +40 more
doaj   +1 more source

T1 Over Squared Proton Density Ratio to Characterize Multiple Sclerosis Lesions

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Differentiating remyelinated from demyelinated lesions in MS remains challenging without histological confirmation. This study introduces the T1‐to‐PD2 ratio (TPR) imaging approach and evaluates its ability to characterize MS lesions alongside other quantitative MRI (qMRI) metrics. Methods Thirty individuals with MS (mean age: 47.5 ± 
Sarah J. Wright, Scotty G. McKay, Jean Ramos Bou, Fen Bao, Vivian B. Truong, Chenyang Li, Li Jiang, Anza B. Memon, E. Mark Haacke, Yulin Ge, Yongsheng Chen   +10 more
wiley   +1 more source

The cost of noise reduction in helicopters

, 1971
November 1971Includes bibliographical references (p. 52)The relationship between noise reduction and direct operating cost was studied for transport helicopters.
Faulkner, Henry B.
core  

Impact of Urban Elevated Complex Roads on Acoustic Environment Quality in Adjacent Areas: A Field Measurement Study

Buildings
The current focus of urban environmental governance is on the traffic noise pollution caused by road transportation. Elevated complex roads, defined as transportation systems comprising elevated roads and underlying ground-level roads, exhibit unique ...
Guangrui Yang, Lingshan He, Yimin Wang, Qilin Liu   +3 more
doaj   +1 more source

Does Long‐Term Lower Extremity Strength Training in Adults With Knee Osteoarthritis and Varus Alignment Reduce Knee Joint Loading During Gait?

Arthritis Care &Research, EarlyView.
Objective We examined whether 18 months of strength training in individuals with knee varus alignment and medial tibiofemoral osteoarthritis (OA) reduced knee joint loads during walking compared to an attention control group. Methods This study was a secondary analysis of a randomized clinical trial that compared the effects of strength training to a ...
Stephen P. Messier, Matthew N. Vigliotti, Paige E. Rice, Brian Pietrosimone, Shannon L. Mihalko, Edward H. Ip, Richard F. Loeser, David J. Hunter, Ali Guermazi, Ryan Hill, Santiago Saldana, Kim L. Bennell, Paul DeVita   +12 more
wiley   +1 more source

Airport Noise Regulation, Airline Service Quality, and Social Welfare [PDF]

This paper explores the impact of airport noise regulation on airline service quality and airfares. It also characterizes the socially optimal stringency of noise limits, taking both noise damage and the various costs borne by airlines and their ...
Jan K. Brueckner, Raquel Girvin
core