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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Mathematical models of laser-tissue interaction and related problems

Whiting, Paul Jonathan January 1991 (has links)
No description available.
2

Finite amplitude propagation of focused ultrasonic waves in water

Baker, Andrew C. January 1989 (has links)
No description available.
3

A Longitudinal Study of the Motivations for the Non-medical Use of Prescription Drugs in a National Sample of Young Adults

Drazdowski, Tess K. 01 January 2016 (has links)
Young adults are most at-risk for the non-medical use of prescription drugs (NMUPD) and many of its associated negative consequences. Understanding this population’s motivations for use can help to inform efforts to reduce NMUPD. Past research has been limited in scope, consisting primarily of cross-sectional work with college students focusing on prescription stimulants. The current study researched how motivations for NMUPD changed over young adulthood using three waves of data from a longitudinal, nationally representative sample of 14,990 19 to 24 year olds in the Monitoring the Future study cohorts collected between 1976 to 2013. Prescription stimulants, central nervous system (CNS) depressants, and opioids were investigated, along with sex and college attendance as potential moderators. Differences in NMUPD motivations for young adults who initiated NMUPD in high school versus in early young adulthood were studied. Additionally, motivation patterns of new users were investigated. Analyses indicated that both recreational and self-treatment motivations commonly were reported over time and across drug classes, with four to five popular motivations acknowledged in each class. In general, generalized estimated equations repeated measure analyses found that NMUPD motivations remained relatively stable across young adulthood, with some reductions for the motivations of experimentation and boredom, and an increase in select self-treatment motivations. Overall, men were more likely to endorse recreational motivations, while women were more likely to endorse self-treatment motivations, though this varied somewhat by prescription drug class. Young adults not enrolled in college courses were more likely to endorse using stimulants non-medically for different reasons than their peers who were enrolled. There also were differences in motivations based on if young adults initiated NMUPD in high school compared to when they were 19/20 years old. However, motivations were fairly consistent across young adult development regardless of when NMUPD was initiated. These data suggest that efforts aimed at preventing or reducing NMUPD in young adult populations should include targets to reduce both self-treatment and recreational motivations; may need to be tailored by prescription drug class, sex, and college attendance status; could start in high school; and can be used for new and continued users across young adulthood.
4

Sexual Victimization Among College Females: Severity and Substance Use

Zielen, Krystal A 01 June 2017 (has links)
Numerous consequences of sexual assault have been identified, including psychological consequences such as posttraumatic stress disorder (PTSD) and health-risk behaviors such as substance misuse. Previous research has indicated that survivors of sexual assault may engage in substance misuse (i.e. alcohol and other illicit and prescription drug use) in attempt to suppress negative thoughts, memories, and flashbacks of the assault. The present study seeks to expand on and examine health-risk behaviors among undergraduate college women after the experience of sexual assault. Although many researchers have focused on the use of alcohol following sexual assault, less have studied non-medical use of prescription drugs (NMUPD) as an alternative method of maladaptive coping. NMUPD has recently been identified as the fastest rising recreational substance among college populations. With NMUPD becoming a norm among college students in recreational settings, exploring NMUPD for alternative uses seems like the next logical step in research. This study views sexual assault on a continuum starting from unwanted sexual contact and ending in completed rape. This study aims to bridge the gap in research by attempting to connect the risky behavior of NMUPD to coping with any experience on the sexual assault continuum among college undergraduate women. Participants with and without a history of sexual assault were recruited for the present study. Participants completed a measure of sexual assault history and severity, along with questionnaires assessing current alcohol, marijuana, and NMUPD use
5

Evaluation Strategies for Risk Assessment and Usability of Medical Plasma Sources in Dermatology

Tiede, Regina 04 August 2017 (has links)
No description available.
6

Predictors of General Medical Use Among Individuals Seeking Therapy for Marital and Family Problems

Christenson, Jacob D. 03 November 2003 (has links) (PDF)
A number of studies have examined variables associated with medical use. However, most of the studies deal with samples that are not easily generalizable to other populations. In particular, no study is known to have looked at general medical use among people seeking services for marital and family problems. In this study, medical use of participants from the marriage and family therapy services at Brigham Young University Comprehensive Clinic was investigated to determine the best predictors of general medical use. Best subsets multiple linear regression showed that the best overall predictors of general medical use were anxiety and hostility.
7

Predictors of Change in Health Care Use After Marital and Family Therapy

Payne, Scott H. 30 November 2006 (has links) (PDF)
The cost of health care continues to increase. Based on the biopsychosocial model of heath care, it has been shown that the treatment of psychological and social problems can have a cost offset effect on the cost of medical care. While this offset effect has been shown in an MFT population, there are no known studies that have looked at predictors of the change in medical use by those that receive marital and family therapy. This study looked at psychological and social measures of individuals who received marital and family therapy. These measures were evaluated based on the change from intake to one year post intake using best subsets multiple regression. The model for males showed variables that could be affected using a cognitive or cognitive-behavioral model of therapy. The model for females showed variables that could be affected using the emotionally focused model of therapy. The implications of this study are that a therapist could be the most effective in conjoint therapy if they apply concepts from both cognitive and emotionally focused therapeutic models.
8

Neuropsychological complaints associated with the non-medical use of prescription psychostimulants

Ford, Rachel Elizabeth 12 December 2009 (has links)
Researchers have argued that a reason for non-medical use of prescription psychostimulants is to self-medicate an undiagnosed case of ADHD. Therefore, this study examined neuropsychological complaints in college students with and without a history of prescription psychostimulant use. College students (N = 615) completed an Internet-based survey assessing behaviors associated with prescription psychostimulant use and symptoms of neuropsychological impairment. The results of the current study support the hypothesis that college students who non-medically use prescription psychostimulants report more symptoms of cognitive impairment (i.e., memory and attention complaints) than college students classified as non-users. Complaints about memory and attention were as common in non-medical users as medical users. Overall, the results suggest that non-medical users may use prescription psychostimulants due to perceived symptoms of ADHD.
9

CONSTRUCTION AND VALIDATION OF A NON-MEDICAL USE OF PRESCRIPTION OPIOIDS OUTCOME EXPECTANCIES SCALE AMONG COLLEGE STUDENTS IN CHINA

Tam, Cheuk Chi 01 January 2019 (has links)
Background:Non-medical use of prescription opioids (NMUPO) has become a clear threat to public health. Young adults (aged 18 to 25) have a high risk of NMUPO. My prior work on Chinese undergraduates indicates a high prevalence of lifetime NMUPO (49.2%). Health behavior theories propose that outcome expectancies are robust psychosocial determinants of substance use. Literature has identified the influence of outcome expectancies on alcohol and drug use. However, the role of outcome expectancies in NMUPO in China is unknown, and a scarcity of a valid measures for NMUPO outcome expectancies may be a barrier. Our previous research also found an association of cultural orientation with NMUPD in Chinese college students, implying that cultural orientation may affect NMUPD-related perceptions, such as outcome expectancies. The purposes of this study were to (1) conduct initial work to develop and validate an NMUPO outcome expectancies scale (NMUPOES) for Chinese college students; (2) examine the association of cultural orientation with factors identified in NMUPOES. Method: Partial data (n = 202) derived from a bigger online dataset collected from 849 undergraduates (average age = 19.65) at two universities in Beijing and Macau in Jan-April 2017 was used in this study. Participants completed the NMUPOES and reported their past-3-month NMUPO and cultural orientation. Exploratory factor analysis, confirmatory factor analysis, and structural equation modeling were employed to test the study hypotheses. Results: Findings suggested four subscales in the 50-item NMUPOES (i.e., social enhancement and tension reduction, academic enhancement, physiological discomfort, and guilt and dependence) and two higher-order factors (i.e., positive expectancies and negative expectancies). All subscales were positively correlated and had good internal consistency. The negative expectancies scale was negatively associated with past-3-month NMUPO. No significant association was found between cultural orientation and the two expectancy factors. Conclusion:NMUPOES is a psychometrically appropriate measure of NMUPO expectancies for Chinese college students. Future research may validate the NMUPOES using a large sample size in both clinical and non-clinical populations in China. An intervention program tailored to outcome expectancies may be beneficial to reduce the risk of NMUPO in Chinese college students.
10

ILLICIT PRESCRIPTION DRUG USE AMONG COLLEGE UNDERGRADUATES: A STUDY OF PREVALENCE AND AN APPLICATION OF SOCIAL LEARNING THEORY

Srnick, Jennifer L. 20 April 2007 (has links)
No description available.

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