Optimal and Robust Designs of Step-stress Accelerated Life Testing Experiments for Proportional Hazards Models

Accelerated life testing (ALT) is widely used to obtain reliability information about a product within a limited time frame. The Cox s proportional hazards (PH) model is often utilized for reliability prediction. My master thesis research focuses on designing accelerated life testing experiments for reliability estimation. We consider multiple step-stress ALT plans with censoring. The optimal stress levels and times of changing the stress levels are investigated. We discuss the optimal designs under three optimality criteria. They are D-, A- and Q-optimal designs. We note that the classical designs are optimal only if the model assumed is correct. Due to the nature of prediction made from ALT experimental data, attained under the stress levels higher than the normal condition, extrapolation is encountered. In such case, the assumed model cannot be tested. Therefore, for possible imprecision in the assumed PH model, the method of construction for robust designs is also explored.

Special Orders No. 18 of the Office U.S. Army Hospital, Camp Parole

Special Orders No. 18 of the Office U.S. Army Hospital, Camp Parole, near Annapolis, MD., March 14, 1865 to W.K. Cleveland assigning him to duty as pathologist and consulting surgeon for the hospital. This is signed by W. Stewart, Surgeon U.S. Vol’s, in charge, March 14, 1865.

Volunteering and Social Capital: A Case Study of Older Hospital Volunteers in Southern Ontario

Volunteering as a form of social activity can facilitate older adults’ active aging through community engagement. The purpose of this qualitative case study was to understand the views on older adults’ volunteerism in a community hospital network in Southern Ontario. Utilizing in-depth interviews with 10 older volunteers (over the age of 65), document analysis, and a key informant interview, I explored their experiences of volunteering and social capital development at six hospitals in the network. Data analyses included open and axial coding, and conceptualization of the themes. Four major themes emerged from the data: reasons to volunteer, management’s influence, negative experiences of volunteering, and connections with others. The findings of this research emphasized older volunteers’ strong commitment and enthusiasm to support the hospital in their own communities, the power of volunteering to enhance the development of bonding, bridging, and linking social capital, and the influence of two major contextual factors (i.e. the Auxiliary Factor and the Change Factor) to facilitate or hinder older volunteers’ social capital development in the hospitals. Future research directions should focus on further unpacking the different degrees to which each type of social capital is developed, placing emphasis on the benefits of social capital development for volunteers in healthcare settings. The implications for practice include the targeted recruitment of older adults as healthcare volunteers while creating volunteer positions and environments in which they can develop social capital with their peer volunteers, hospital staff, patients, and people in surrounding communities. To sustain their existing dedicated long-term volunteers, in particular their Auxiliary groups, the community hospital network can enhance facilitating factors such as the Auxiliary Factor while mitigating the negative effects of the Change Factor. By developing social capital through volunteering in their own communities, older adults can engage in active aging, while participating in the development of an age-friendly community.

Accidentes con exposición a residuos biológicos infecciosos en trabajadores de la salud de un hospital universitario de la ciudad de Monterrey, N.L., Méx., en el año 1996

Tesis (Maestría en Salud Pública con Especialidad en Salud en el Trabajo) UANL

Factores de riesgo que intervienen en la aparición de agresión física del paciente hacia el personal que labora en un hospital psiquiátrico

Tesis (Maestría en Salud Pública con Especialidad en Salud en el Trabajo) UANL

Repercusión de lesiones oculares por cuerpos extraños ocurridas en el área de trabajo de los derechohabientes del I.M.S.S. que acuden a la Clínica Hospital de Zona no. 17 en Monterrey, Nuevo León.

Tesis (Maestría en Salud Pública con Especialidad en Salud en el Trabajo) UANL

Nivel de plomo en sangre en recién nacidos y su relación con el peso de éstos en el Hospital Universitario de Monterrey,N.L.

Tesis (Maestría en Salud Pública con Especialidad en Nutrición Comunitaria) UANL

Fractura de cadera subtrocantéricas e intertrocantéricas y los antecedentes personales no patológicos de mujeres de 50-78 años de edad en un hospital de 3er. nivel del área metropolitana de Monterrey, enero 1999 a enero 2000

Tesis (Maestría en Salud Pública con Especialidad en Salud en el Trabajo) UANL.

Implementación de una técnica para el desarrollo de los cultivos celulares en muestras de células de cordón umbilical del Banco de cordón del Hospital Universitario.

Tesis (Especialidad en el Laboratorio de Hematología) UANL, 2010.

Detección de anticuerpos para Legionella pneumophila en pacientes del Hospital Universitario José Eleuterio González

Tesis ( Maestro en Ciencias) U.A.N.L.

Morbimortalidad neonatal por enfermedad de membrana hialina en el Hospital Infantil de Monterrey Juan Angel González Escamilla

Tesis (Especialidad en Pediatría)U.A.N.L.

Resultados del manejo quirúrgico del trauma hepático en el Hospital Regional No.21 I.M.S.S. (por) Carlos Arreola Risa

Tesis (Especialidad en Cirugía General) U.A.N.L.

Valoración de la nutrición parenteral total en el área de cuidados intensivos en el Hospital Infantil de Monterrey de la Secretaría Eloisa Guerrero Garza

Tesis (Lic. en Nutrición) U.A.N.L.

Estilos de liderazgo administrativo predominante en administradores de enfermería en un hospital de tercer nivel de atención

Tesis (Maestría en Enfermería, con especialidad en Administración de Servicios de Enfermería) U.A.N.L.

Epilepsia y síndromes epilépticos en el niño experiencia en el Hospital Infantil de Monterrey [por] Laura Leticia Rodríguez Reynosa

Tesis (Especialidad en Pediatría). U. A. N. L.