Skip to content. | Skip to navigation

Personal tools

Navigation

You are here: Home

Search results

425 items matching your search terms.
Filter the results.
Item type









































New items since



Sort by relevance · date (newest first) · alphabetically
Article Reference Troff document (with manpage macros)An empirical approach based on quantile regression for estimating citation ageing
An aspect of citation behavior, which has received longstanding attention in research, is how articles’ received citations evolve as time passes since their publication (i.e., citation ageing). Citation ageing has been studied mainly by the formulation and fit of mathematical models of diverse complexity. Commonly, these models restrict the shape of citation ageing functions and explicitly take into account factors known to influence citation ageing. An alternative—and less studied—approach is to estimate citation ageing functions using data-driven strategies. However, research following the latter approach has not been consistent in taking into account those factors known to influence citation ageing. In this article, we propose a model-free approach for estimating citation ageing functions which combines quantile regression with a non-parametric specification able to capture citation inflation. The proposed strategy allows taking into account field of research effects, impact level effects, citation inflation effects and skewness in the distribution of cites effects. To test our methodology, we collected a large dataset consisting of more than five million citations to 59,707 research articles spanning 12 dissimilar fields of research and, with this data in hand, tested the proposed strategy.
Located in MPRC People / Sebastian Galiani, Ph.D. / Sebastian Galiani Publications
Article ReferenceAnalyzing Associations Between Chronic Disease Prevalence and Neighborhood Quality Through Google Street View Images
Deep learning and, specifically, convoltional neural networks (CNN) represent a class of powerful models that facilitate the understanding of many problems in computer vision. When combined with a reasonable amount of data, CNNs can outperform traditional models for many tasks, including image classification. In this work, we utilize these powerful tools with imagery data collected through Google Street View images to perform virtual audits of neighborhood characteristics. We further investigate different architectures for chronic disease prevalence regression through networks that are applied to sets of images rather than single images. We show quantitative results and demonstrate that our proposed architectures outperform the traditional regression approaches.
Located in MPRC People / Quynh Nguyen, Ph.D., M.S.P.H. / Quynh Nguyen Publications
Analyzing the effects of food supplementation and adherence support on food insecurity, time allocation, and quality of life indices of patients on antiretroviral treatment in the Free State Province, South Africa
Alok Bhargava investigates food insecurity, quality of life, and productivity among HIV patients receiving antiretroviral treatment in South Africa
Located in Resources / / Seed Grant Program / Seed Grants Awarded
Andrew Fenelon, Assistant Professor, Health Services Administration
HUD Rental Assistance, Neighborhoods, and Adult Health in the United States
Located in Coming Up
Anne Pebley, UCLA
Is occupational stratification responsible for social inequality in old age disability in Mexico?
Located in Coming Up
Article Reference Troff document (with manpage macros)Antibiotic and herbicide concentrations in household greywater reuse systems and pond water used for food crop irrigation: West Bank, Palestinian Territories
Greywater is increasingly treated and reused for agricultural irrigation in off-grid communities in the Middle East and other water scarce regions of the world. However, there is a dearth of data regarding levels of antibiotics and herbicides in off-grid greywater treatment systems. To address this knowledge gap, we evaluated levels of these contaminants in two types of greywater treatment systems on four farms in the West Bank, Palestinian Territories. Samples of household greywater (influent, n = 23), treated greywater effluent intended for agricultural irrigation (n = 23) and pumped groundwater held in irrigation water ponds (n = 12) were collected from October 2017 to June 2018. Samples were analyzed using high performance liquid chromatography tandem mass spectrometry (LC-MS/MS) for the following antibiotics and herbicides: alachlor, ampicillin, atrazine, azithromycin, ciprofloxacin, erythromycin, linezolid, oxacillin, oxolinic acid, penicillin G, pipemidic acid, sulfamethoxazole, triclocarban, tetracycline, triflualin, and vancomycin. All tested antibiotics and herbicides were detected in greywater influent samples at concentrations ranging from 1.3 to 1592.9 ng/L and 3.1–22.4 ng/L, respectively. When comparing influent to effluent concentrations, removal was observed for azithromycin, alachlor, linezolid, oxacillin, penicillin G, pipemidic acid, sulfamethoxazole, triclocarban, and vancomycin. Removal was not observed for atrazine, ciprofloxacin, erythromycin, oxolinic acid, tetracycline, and trifluralin. Pond water also contained the majority of tested contaminants, but at generally lower concentrations. To our knowledge, this is the first description of an extensive array of antibiotics and herbicides detected in household greywater from off-grid treatment systems.
Located in MPRC People / Amir Sapkota, Ph.D. / Amir Sapkota Publications
Article Reference Troff document (with manpage macros)Applying Benefit-Cost Analysis to Air Pollution Control in the Indian Power Sector
Air pollution is a persistent and well-established public health problem in India: emissions from coal-fired power plants have been associated with over 80,000 premature deaths in 2015. Premature deaths could rise by four to five times this number by 2050 without additional pollution controls. We site a model 500 MW coal-fired electricity generating unit at eight locations in India and examine the benefits and costs of retrofitting the plant with a flue-gas desulfurization unit to reduce sulfur dioxide emissions. We quantify the mortality benefits associated with the reduction in sulfates (fine particles) and value these benefits using estimates of the value per statistical life transferred to India from high income countries. The net benefits of scrubbing vary widely by location, reflecting differences in the size of the exposed population. They are highest at locations in the densely populated north of India, which are also among the poorest states in the country.
Located in MPRC People / Maureen Cropper, Ph.D. / Maureen Cropper Publications
Are Indian pharmaceutical companies deliberately selling inferior medicines in African markets?
Tougher regulatory measures needed in order to improve drug safety and quality
Located in News
Arun Hendi, Princeton University
Where Does the Black-White Life Expectancy Gap Come From? The Deadly Effects of Residential Segregation
Located in Coming Up
Ashton Verdery, Penn State University
Older Adult Family Structure and Mortality (co-authored work with Sarah Patterson and Rachel Margolis)
Located in Coming Up