Risk Factors and Associations for Hepatitis C Infection among Hispanic/Latino Intravenous Drug Users in Miami-Dade County, Florida

Hepatitis C infection (HCV) continues to disproportionately affect Hispanics/Latinos in the United States. Hispanic/Latino intravenous drug users (IDUs), because of their risky injection and sexual behaviors, are prone to HCV infection and rapid transmission of the virus to others via several routes. With a prevalence rate of approximately 75% among IDUs, it is imperative that transmission of HCV be prevented in this population. This study aims to examine the associations between demographic, injection and sexual risk factors to HCV infection in a group Hispanic/Latino IDUs in Miami-Dade County, Florida. Preliminary unadjusted results in this sample reveal that age (OR=4.592, p=0.004), weekly injection (OR=5.171, p=0.000), daily injection frequency (OR=3.856, p=0.000) and use of a dirty needle (OR=2.320, p= 0.006) were all significantly associated with HCV infection. Being born outside the U.S. was significantly negatively associated with HCV infection (OR=0.349, p=0.004). Additionally, having two or more sex partners in the past three months (OR=0.472, p=0.014) was negatively associated with HCV infection. After adjusting for all other variables, older age (AOR=7.470, p=0.006), weekly injection (AOR=3.238, p=0.007) and daily injection frequency (AOR=2.625, p=0.010) were all significantly associated with HCV infection. Being born outside the U.S. (AOR=0.369, p=0.019) was a significant protective factor for HCV infection, along with having two or more sex partners in the past three months (AOR=0.481, p=0.037). When analyzing the significant variables in a backward regression model, having 2 or more sex partners in the past three months was not significant at the p

Dynamic Image Precompensation for Improving Visual Performance of Computer Users with Ocular Aberrations

With the progress of computer technology, computers are expected to be more intelligent in the interaction with humans, presenting information according to the user's psychological and physiological characteristics. However, computer users with visual problems may encounter difficulties on the perception of icons, menus, and other graphical information displayed on the screen, limiting the efficiency of their interaction with computers. In this dissertation, a personalized and dynamic image precompensation method was developed to improve the visual performance of the computer users with ocular aberrations. The precompensation was applied on the graphical targets before presenting them on the screen, aiming to counteract the visual blurring caused by the ocular aberration of the user's eye. A complete and systematic modeling approach to describe the retinal image formation of the computer user was presented, taking advantage of modeling tools, such as Zernike polynomials, wavefront aberration, Point Spread Function and Modulation Transfer Function. The ocular aberration of the computer user was originally measured by a wavefront aberrometer, as a reference for the precompensation model. The dynamic precompensation was generated based on the resized aberration, with the real-time pupil diameter monitored. The potential visual benefit of the dynamic precompensation method was explored through software simulation, with the aberration data from a real human subject. An "artificial eye'' experiment was conducted by simulating the human eye with a high-definition camera, providing objective evaluation to the image quality after precompensation. In addition, an empirical evaluation with 20 human participants was also designed and implemented, involving image recognition tests performed under a more realistic viewing environment of computer use. The statistical analysis results of the empirical experiment confirmed the effectiveness of the dynamic precompensation method, by showing significant improvement on the recognition accuracy. The merit and necessity of the dynamic precompensation were also substantiated by comparing it with the static precompensation. The visual benefit of the dynamic precompensation was further confirmed by the subjective assessments collected from the evaluation participants.

The Influence of Gender on Perceived Treatment Need among a Community Sample of Substance Users

Purpose: Most individuals do not perceive a need for substance use treatment despite meeting diagnostic criteria for substance use disorders and they are least likely to pursue treatment voluntarily. There are also those who perceive a need for treatment and yet do not pursue it. This study aimed to understand which factors increase the likelihood of perceiving a need for treatment for individuals who meet diagnostic criteria for substance use disorders in the hopes to better assist with more targeted efforts for gender-specific treatment recruitment and retention. Using Andersen and Newman’s (1973/2005) model of individual determinants of healthcare utilization, the central hypothesis of the study was that gender moderates the relationship between substance use problem severity and perceived treatment need, so that women with increasing problems due to their use of substances are more likely than men to perceive a need for treatment. Additional predisposing and enabling factors from Andersen and Newman’s (1973/2005) model were included in the study to understand their impact on perceived need. Method: The study was a secondary data analysis of the 2010 National Survey on Drug Use and Health (NSDUH) using logistic regression. The weighted sample consisted of a total 20,077,235 American household residents (The unweighted sample was 5,484 participants). Results of the logistic regression were verified using Relogit software for rare events logistic regression due to the rare event of perceived treatment need (King & Zeng, 2001a; 2001b). Results: The moderating effect of female gender was not found. Conversely, men were significantly more likely than women to perceive a need for treatment as substance use problem severity increased. The study also found that a number of factors such as race, ethnicity, socioeconomic status, age, marital status, education, co-occurring mental health disorders, and prior treatment history differently impacted the likelihood of perceiving a need for treatment among men and women. Conclusion: Perceived treatment need among individuals who meet criteria for substance use disorders is rare, but identifying factors associated with an increased likelihood of perceiving need for treatment can help the development of gender-appropriate outreach and recruitment for social work treatment, and public health messages.

Do intelligent heating controls out-smart ordinary users?

Nearly a third of UK gas and electricity is used in homes, of which 80% is for space heating and hot water provision. Rising consumer bills, concerns about climate change and the surge in personal digital technology use has provoked the development of intelligent domestic heating controls. Whilst the need for having suitable control of the home heating system is essential for reducing domestic energy use, these heating controls rely on appropriate user interaction to achieve a saving and it is unclear whether these ‘smart’ heating controls enhance the use of domestic heating or reduce energy demand. This paper describes qualitative research undertaken with a small sample of UK householders to understand how people use new heating controls installed in their homes and what the requirements are for improved smart heating control design. The paper identifies, against Nielsen’s usability heuristics, the divergence between the householder’s use, understanding and expectations of the heating system and the actual design of the system. Digital and smart heating control systems should be designed to maximise usability so that they can be effectively used for efficient heating control by all users. The research highlights the need for development of new systems to readdress the needs of users and redefine the system requirements.

What Influences Information Security Behavior? A Study with Brazilian Users

The popularization of software to mitigate Information Security threats can produce an exaggerated notion about its full effectiveness in the elimination of any threat. This situation can result reckless users behavior, increasing vulnerability. Based on behavioral theories, a theoretical model and hypotheses were developed to understand the extent to which human perception of threat, stress, control and disgruntlement can induce responsible behavior. A self-administered questionnaire was created and validated. The data were collected in Brazil, and complementary results regarding similar studies conducted in USA were found. The results show that there is influence of information security orientations provided by organizations in the perception about severity of the threat. The relationship between threat, effort, control and disgruntlement, and the responsible behavior towards information security was verified through linear regression. The contributions also involve relatively new concepts in the field and a new research instrument.

Reprogramming of DNA Methylation in Pollen Guides Epigenetic Inheritance via Small RNA

Epigenetic inheritance is more widespread in plants than in mammals, in part because mammals erase epigenetic information by germline reprogramming. We sequenced the methylome of three haploid cell types from developing pollen: the sperm cell, the vegetative cell, and their precursor, the postmeiotic microspore, and found that unlike in mammals the plant germline retains CG and CHG DNA methylation. However, CHH methylation is lost from retrotransposons in microspores and sperm cells and restored by de novo DNA methyltransferase guided by 24 nt small interfering RNA, both in the vegetative nucleus and in the embryo after fertilization. In the vegetative nucleus, CG methylation is lost from targets of DEMETER (DME), REPRESSOR OF SILENCING 1 (ROS1), and their homologs, which include imprinted loci and recurrent epialleles that accumulate corresponding small RNA and are premethylated in sperm. Thus genome reprogramming in pollen contributes to epigenetic inheritance, transposon silencing, and imprinting, guided by small RNA.

Satisfaction of users of primary health care with nursing care : sample of the central region of Portugal

Introdução: A satisfação dos doentes constitui um indicador indispensável para a avaliação da qualidade dos cuidados e há evidência da sua correlação com os resultados em saúde. A satisfação com os cuidados de saúde é um conceito multidimensional que considera aspetos como acesso, organização e interação doente - profissional. Consideramos que os cuidados de enfermagem, em particular, são fundamentais no processo saúde/doença. Objetivos: Validar uma escala para avaliar a satisfação dos utentes face aos cuidados de enfermagem, adaptado do instrumento EUROPEP e avaliar a satisfação dos utentes dos cuidados de saúde primários da região centro de Portugal. Material e métodos: Estudo transversal, com uma amostra de 827 utentes adultos (maioria do sexo feminino 64,4%) com uma média de idade de 50,08±18,58 anos. Os dados foram recolhidos através de um questionário, constituído por variáveis sociodemográficas, o instrumento EUROPEP (Ferreira, 1995) para avaliar a satisfação com os cuidados de saúde primários e para avaliar a satisfação especificamente com a equipa de enfermagem elaboramos questões adaptadas do instrumento EUROPEP e agrupadas nas dimensões relação de ajuda, dimensão interpessoal e instrumental. A consistência interna, reprodutibilidade e análise de conteúdo foram avaliados com recurso ao SPSS 23.0; considerando a consistência aceitável para um de Cronbach > 0,70. O coeficiente para cada item é apresentado com um intervalo de confiança de 95%. Resultados: Em todas as dimensões do questionário EUROPEP, a maior percentagem de satisfação com os cuidados situou-se entre “boa” e “muito boa”. As dimensões criadas para avaliar especificamente os cuidados de enfermagem apresentaram um coeficiente de α de Cronbach total de 0,972. Conclusões: Estes resultados sugerem que as dimensões criadas para avaliar os cuidados de enfermagem serão úteis para a investigação na população Portuguesa. A satisfação do utente é decisiva para a qualidade e eficiência dos cuidados prestados, sendo necessário o compromisso de todos os prestadores na implementação de práticas sistemáticas de gestão que conduzam à satisfação, dando particular atenção à melhoria contínua dos processos organizacionais. Palavras-chave: Satisfação dos Utentes; cuidados de saúde primários, cuidados de enfermagem, adulto, Portugal

DIGITAL HISTORY: DESIGNING VIRTUAL ENVIRONMENTS THAT SUPPORT CRITICAL THINKING AND IDEA EXCHANGE, MOTIVATE AND ENGAGE USERS

Thesis (Master, Education) -- Queen's University, 2016-08-29 15:56:53.748

Mobility and satisfaction with lower-limb prostheses and orthoses among users in Sierra Leone: A cross-sectional study

Objectives: To investigate patients' mobility and satisfaction with their lower-limb prosthetic or orthotic device and related service delivery in Sierra Leone; to compare groups of patients regarding type and level of assistive device, gender, area of residence, income; and to identify factors associated with satisfaction with the assistive device and service. Methods: A total of 139 patients answered questionnaires, including the Quebec User Evaluation of Satisfaction with Assistive Technology questionnaire (QUEST 2.0). Results: Eighty-six percent of assistive devices were in use, but half needed repair. Thirty-three percent of patients reported pain when using their assistive device. Patients had difficulties or could not walk at all on: uneven ground (65%); hills (75%); and stairs (66%). Patients were quite satisfied with their assistive device and the service (mean 3.7 out of 5 in QUEST), but reported 886 problems. Approximately half of the patients could not access services. In relation to mobility and service delivery, women, orthotic patients and patients using above-knee assistive devices had the poorest results. The general condition of the assistive device and patients' ability to walk on uneven ground were associated with satisfaction with the assistive devices and service. Conclusion: Patients reported high levels of mobility while using their device although they experienced pain and difficulties walking on challenging surfaces. Limitations in the effectiveness of assistive devices and limited access to follow-up services and repairs were issues desired to be addressed.

Kitchens and pantries—helping or hindering? The perspectives of emergency food users in Victoria, Australia

In high-income countries, people affected by food insecurity may seek out free/subsidized food from charities. Their perceptions of the food programs provided and preferences for alternative strategies are underresearched. The aim of this study was to develop an understanding of the users’ experiences of food insecurity and gain evidence for effective responses in the future. Twelve semistructured interviews with a sample of users, who were also charity volunteers, were conducted in Victoria, Australia. A thematic analysis of the interview transcripts was undertaken. The results show that users have complex needs. Charities have both the capacity to hinder and help people maintain dignity, social inclusion, and health. Alternative community and policy food security strategies were proposed by interviewees. In the future, perspectives of affected community members must inform strategies that seek to improve people’s access to safe, nutritious, and affordable food. A human right to food framework is discussed as a mechanism to help realize food security in Australia.

Changes in Australian injecting drug users’ mental health problems and service uptake from 2006-2012

Purpose– The purpose of this paper is to assess changes in rates of mental health problems and service utilisation for Australian regular injecting drug users (IDUs) from 2006 to 2012. Design/methodology/approach – Data were taken from Illicit Drug Reporting System national surveys with 914 regular IDUs in 2006 and 883 in 2012. Changes in rates of self-reported mental health problems and service use were assessed. Findings – Rates of self-reported mental health problems increased from 38.3 per cent in 2006 to 43.7 per cent in 2012 – mainly due to increases in anxiety rates. Conversely, there was a decrease in mental health service use from 70.2 to 58.4 per cent by 2012. However, there was a proportional increase in the use of psychologists. These trends remained after controlling for socio-demographic and medical differences between the 2006/2012 samples. K10 scores for 2012 participants validated the use of the self-report measures. Practical implications – Reductions in stigma, improvements in mental health literacy, and modest increases in anxiety may explain increases in self-report of mental health problems. Stagnant service utilisation rates in an expanding population willing to self-report may explain decreasing service use. The introduction of key mental health reforms also may have contributed, particularly with the increase in psychologist access. This paper highlights the need for improved population monitoring of mental health in disadvantaged groups such as IDUs. Originality/value – This paper is the first to assess changes in mental health outcomes over time in Australian IDUs. This examination covered a critical era in the mental health landscape, with significant increases in public awareness campaigns and major mental health reforms.

Estructuración y estrategia de implementación de la empresa Outlanders Colombia

En el presente documento vamos a explicar el modelo de implementación y ejecución de la empresa Outlanders Colombia, dedicada al ofrecimiento de experiencias de ecoturismo a un público local y extranjero ubicado en Bogotá principalmente caracterizado por ser dinámico y buscar la realización de actividades de contacto con la naturaleza. Para el año 2018 queremos posicionarnos como una empresa referente en nuestro sector por ofrecer servicios de alta calidad en los destinos que abarcamos. Adicionalmente buscaremos concretar la realización de alianzas y acuerdos de cooperación con universidades, ONG´s y demás entidades que puedan ser fuentes de usuarios para nuestras actividades. Por otra parte y aprovechando un eventual escenario de paz en nuestro país, continuaremos con la exploración de lugares de alto atractivo natural en toda Colombia y seguiremos con nuestro modelo de desarrollo de alianzas con operadores y guías turísticos locales que tengan experiencia en la atención al mercado local y se adecúen a la gestión de calidad que planteamos para la prestación de servicios a un público más exigente. Dentro de nuestro portafolio actual ofrecemos productos enmarcados en 4 categorías distintas: Actividades de 1 día, Experiencias en ambientes naturales, recorridos por corredores turísticos y expediciones técnicas. En un futuro cercano desarrollaremos una nueva categoría: Inmersiones etnográficas, en donde pretendemos que nuestro cliente comparta con comunidades indígenas y socialmente lejanas al pensamiento occidental. Para hacer conocer al cliente potencial de nuestros servicios, realizaremos inicialmente caminatas y recorridos gratuitos en donde la gente interesada en actividades outdoor tenga una “muestra gratis” de nuestros servicios. Adicionalmente estamos en proceso de consolidación de alianzas para la promoción de nuestros servicios en entidades con flujo de clientes potenciales: Universidades, ONG´s, colegios, etc. Para complementar nuestra estrategia de publicidad y mercadeo realizaremos una fuerte presencia en redes sociales y canales virtuales de mercadeo. Sabemos de la gran influencia que tiene el componente audiovisual en la promoción de nuestros servicios por lo que nos enfocaremos en mostrar imágenes de lugares con alto atractivo natural por nuestros medios virtuales. Por otra parte sabemos de la importancia de ofrecer un servicio de alta calidad a nuestros turistas, por lo que nos aseguraremos de contar con equipo y personal adecuado para el desarrollo de las actividades. Programas de aseguramiento de la calidad y mejora continua son para nosotros una prioridad. Nuestro equipo inicialmente se compone de dos personas, que se encargan inicialmente de desarrollar labores en las dos principales áreas con las que por el momento cuenta la empresa: Logística y Marketing. Sin embargo para la realización de nuestras actividades contratamos temporalmente (dependiendo de la duración de los viajes) los servicios de expertos, guías y una serie de terceros preferiblemente provenientes de los lugares que visitamos. Actualmente contamos con experiencia en el sector con un acumulado de más de 30 viajes organizados en distintos destinos dentro del país que hacen parte de nuestro portafolio. Nos visualizamos como expertos en la realización de viajes destinos de difícil acceso en el país y así mismo nos queremos posicionar como una empresa ambiental y socialmente responsable con un modelo financiero sostenible.