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121.
Sara Teixeira Bruno Magalhães Pedro M. Martins Klaus Kühn Lluís Soler Senentxu Lanceros-Méndez Gianaurelio Cuniberti 《Global Challenges》2018,2(3):1700124
An approach for underground, deep, and turbid water remediation is presented based on optical fibers with a photocatalytic coating. Thus, photocatalytic TiO2 P25 nanoparticles immobilized in a poly(vinylidene difluoride) (PVDF) matrix are coated on polymeric optical fibers (POFs) and the photocatalytic performance of the system is assessed under artificial sunlight. To the best of our knowledge, poly(methyl methacrylate)-POF coated with TiO2/PVDF and the reusability of any type of POF for photocatalytic applications are not previously reported. The photocatalytic efficiency of the hybrid material in the degradation of ciprofloxacin (CIP) and its reusability are evaluated here. It is shown that 50 w/w% of TiO2 P25 achieves a degradation of 95% after 72 h under artificial sunlight and a reusability of three times leads to a loss of activity inferior to 11%. The efficient removal of ciprofloxacin and the stability of the POF coated with TiO2 P25 successfully demonstrate its suitability in the degradation of pollutants with potential application in regions with low light illumination, as in underground and deep water. 相似文献
122.
Sara B. Oswalt Alyssa M. Lederer Kimberly Chestnut-Steich Carol Day Ashlee Halbritter Dugeidy Ortiz 《Journal of American college health : J of ACH》2020,68(1):41-51
AbstractObjective: To examine changes in diagnoses/treatment for 12 mental health (MH) conditions, previous use of campus MH services, and willingness to seek MH services in the future. Participants: ACHA–NCHA II participants from 2009 to 2015 (n?=?454,029). Methods: Hierarchical binary logistic regression with step 1 controlling for demographics and step 2 considering time. Results: Time was significant except for bipolar disorder, bulimia, and schizophrenia with increases for all conditions except substance abuse. Anxiety (OR?=?1.68), panic attacks (OR?=?1.61), and ADHD (OR?=?1.40) had the highest odd ratios. Use of MH services at current institution (OR?=?1.30) and willingness to utilize services in the future (OR?=?1.37) also increased over time. Conclusions: Based on a national sample, self-reported diagnoses/treatment of several MH conditions are increasing among college students. This examination of a variety of MH issues can aid college health professionals to engage institutional stakeholders regarding the resources needed to support college students’ MH. 相似文献
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124.
Housing recovery is an unequal and complex process presumed to occur in four stages: emergency shelter, temporary shelter, temporary housing, and permanent housing. This work questions the four-stage typology and examines how different types of shelter align with multiple housing recovery stages given different levels of social vulnerability. This article also presents a Markov chain model of the postdisaster housing recovery process that focuses on the experience of the household. The model predicts the sequence and timing of a household going through housing recovery, capturing households that end in either permanent housing or a fifth possible stage of failure. The probability of a household transitioning through the stages is computed using a transition probability matrix (TPM). The TPM is assembled using proposed transition probability models that vary with the social vulnerability of the household. Monte Carlo techniques are applied to demonstrate the range of sequences and timing that households experience going through the housing recovery process. A set of computational rules are established for sending a household to the fifth stage, representing a household languishing in unstable housing. This predictive model is exemplified on a virtual community, Centerville, where following a severe earthquake scenario, differences in housing recovery times exceed four years. The Centerville analysis results in nearly 5% of households languishing in unstable housing, thereby failing to reach housing recovery. These findings highlight the disparate trajectories experienced by households with different levels of social vulnerability. Recommendations are provided at the end for more equitable postdisaster recovery policies. 相似文献
125.
To better understand how media exposure to terrorism-related images can lead to perceiving immigrants as more threatening, in the present study we manipulated participants’ exposure to media coverage of terrorist attacks and investigated how this may influence people's perception of Arab immigrants. Considering the important role of regulatory abilities when facing stressful events like terrorist attacks, we measured individual differences in both trait emotional intelligence and resting heart rate variability (HRV). Results showed that participants perceived Arab immigrants as more threatening in the media exposure condition than in the control condition. Importantly, there were moderating effects of both trait emotional intelligence and HRV. People with lower trait emotional intelligence or lower HRV at rest felt more threatened in the media exposure condition compared to the control condition, whereas this effect was not observed among participants with higher trait emotional intelligence or higher resting HRV. The present study highlights some of the complexities related to how media exposure to terrorism-related images influences people's reactions to, and evaluations of, an outgroup that is related to the perpetrators of the attacks. 相似文献
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127.
This paper aims to assess the state of the art, the structure and the evolution of the debate on control enhancing mechanisms (hereafter CEMs). It combines bibliometric and qualitative methodologies to analyze 210 articles published in scientific journals up to 2014. The findings show that the academics’ interest has increased over time, and the research has simultaneously developed along two main poles: antecedents and consequences of the proportionality principle. The analyses also reveal that the debate stems from the US studies on the legal principles of disproportionate ownership devices at the end of 19th century, and has been strongly fueled by the ‘law and finance’ theorists. This paper has both theoretical and practical implications. First, it provides insights into underexplored issues where future research efforts could be focused. Second, it supports new policy‐making interventions to CEMs and encourages investor regulation and corporate transparency. 相似文献
128.
Although pet interacters from a sample of 250 persons over 50 years of age generally report receiving more intense uplifts than hassles from their pets (Chi Square = 26.7, p<0.001), there are also differences seen within this group. More specifically, differences are seen in regard to relationships between reported hassles and uplifts from pets, and socializing, life situation, and gender. For example, pet interacters who report a great deal of uplift from pets also report doing things with friends more frequently than do interacters who report only slight uplift from pets (t=2.38, p<0.05). Importantly, pets also appear to serve different roles for female and for male pet interacters, and for pet interacters in different circumstances. Uplifts from pets are associated with leisure and lack of psychological pressure for females, but are related to hassles with social interactions, time, and money for males. Contrastingly, females who report hassles from pets report hassles in the areas of free time, money, and health, but uplifts from social interactions. Human interactions with pets frequently contribute to quality of life and these interactions merit further study. 相似文献
129.
In response to increases in cohabitation in the United States, researchers have recently focused on differences between cohabiting and marital unions. One consistent finding is a higher rate of domestic violence among cohabiting couples as compared with married couples. A prominent explanation for this finding is that cohabitation is governed by a different set of institutionalized controls than marriage. This article explores an alternative explanation, namely, that differences in selection out of cohabitation and marriage, including selection of the least-violent cohabiting couples into marriage and the most-violent married couples into divorce, lead to higher observed rates of violence among cohabiting couples in cross-sectional samples. Our results suggest that researchers should be cautious when making comparisons between married and cohabiting couples in which the dependent variable of interest is related to selection into and out of relationship status. 相似文献
130.
Irwin Garfinkel Chien-Chung Huang Sara S. McLanahan Daniel S. Gaylin 《Journal of population economics》2003,16(1):55-70
This paper examines the effects of stronger child support enforcement and declines in welfare benefits on changes in non-marital
childbearing between 1980 and 1996. Economic theory suggests that stricter child support enforcement will increase the costs
of children for unwed fathers, making them less likely to have a child outside marriage. Reductions in welfare benefits also
are expected to increase the costs of non-marital childbearing for both mothers and fathers. We examine these hypotheses,
using aggregate state-level data and fixed effects regression models to identify the effects of policies on non-marital birth
rates. We find that both stricter child support enforcement and declines in welfare benefits deter non-marital births. However,
the estimated effects of child support enforcement are more robust and larger than those of welfare. The estimates imply that
in the 1980–1996 period, increases in child support enforcement led to a decline in non-marital birth rates in the range of
6% to 9%, whereas decreases in welfare benefits led to a decline in the range of 2% to 4%.
Received: 28 June 2000/Accepted: 17 September 2001 相似文献