Las prácticas de recursos humanos y su incidencia en el bienestar laboral de los empleados

El objetivo del presente trabajo es formular, mediante una profunda revisión documental, bibliográfica y empírica, una fundamentación teórica sobre si existe o no incidencia de las prácticas de recursos humanos sobre el bienestar laboral de los empleados, y el que grado en que esta se presenta sobre aspecto como el engagement y la satisfacción laboral. Se realizó la revisión de múltiples estudios empíricos que aportaran evidencia sobre la relación que se presenta entre las principales prácticas de recursos humanos – provisión de personal, formación y desarrollo, promoción de personal, evaluación de desempeño, compensación y pago, y balance trabajo-familia – y el bienestar laboral, representado en el engagement y satisfacción en el trabajo de los empleados. Los resultados de este trabajo indican la existencia de una relación e incidencia de las prácticas de recursos humanos, el bienestar laboral, el engagement y la satisfacción laboral. De igual forma se encontró que estas relaciones son principalmente de carácter positivo, lo cual indica que las organizaciones que desarrollan este tipo de prácticas en su interior, fomentan tanto el desarrollo y la presencia de bienestar laboral en sus empleados, como su perdurabilidad.

Creatividad y construcción arquitectónica de vanguardia : estudio sobre proceso de invención y modelo didáctico de aplicación para el desarrollo creativo en la enseñanza [sic] aprendizaje en la introducción al diseño arquitectónico.

En esta tesis, se profundiza en los estudios sobre el fenómeno de la creatividad aplicada en diferentes ámbitos de estudio, de la época de finales del siglo XIX principios del XX. La hipótesis planteada en este trabajo se centra en la posibilidad de dar a conocer el proceso del pensamiento creativo a los profesores-arquitectos, para que éstos puedan innovar y valorar el material adecuado en el desarrollo de la actividad creativa, y emplearlo con los alumnos de los dos primeros semestres de la carrera de ingeniero arquitecto, en el Instituto Politécnico Nacional (IPN) de México. El estudio se enfoca a realizar una exhaustiva revisión bibliográfica de las teorías de la creatividad, los entornos de aprendizaje, el arte moderno y la arquitectura, determinando algunas características y desarrollos especulativos, para luego cotejarlos con el análisis de dos obras arquitectónicas de gran envergadura. Se consultaron los programas de estudio de dos asignaturas de la etapa formativa de la carrera de ingeniero arquitecto, relacionadas con el diseño arquitectónico y el Nuevo Modelo Educativo del IPN.

Modelo de innovación educativa : un marco para la formación y el desarrollo de una cultura de la innovación.

Resumen basado en el de la publicación

Perspectiva de g??nero un planteamiento para la ense??anza de compiladores mediante mapas conceptuales

Avui dia el sector educatiu presenta grans canvis que la societat ha anat exigint: ser a l'avantguarda en ci??ncia i tecnologia, treballar en un marc que no discrimini els homes i les dones i integrar estrat??gies que permetin aprendre significativament, aix?? com desenvolupar-se i laborar amb perspectiva de g??nere. Com una resposta, al present treball es presenta la implementaci?? de mapes conceptuals com a eina d'aprenentatge significatiu amb enfocament de perspectiva de g??nere per a ensenyament de Compiladors, assignatura de la carrera d'Enginyeria en Computaci?? a l???ESIME - Culhuacan, de l'IPN. En dur a terme la metodologia proposada es va obtenir una millora notable per part d'alumnes que varen mostrar dificultat per comprendre l'assignatura, conjuntament es va aconseguir un progr??s grupal que va beneficiar ambd??s sexes mitjan??ant la creaci?? de mapes conceptuals i un millor aprofitament de coneixements. Tamb?? es va observar que, en planejar un tema o classe, la persona que el dissenya ha de ser conscient que en l'activitat hi participaran estudiants d'ambd??s sexes, de manera que un curr??culum amb enfocament de g??nere afavoreix la igualtat d'oportunitats.

Aplicando mapas conceptuales en teoria de aut??matas para evaluar aprendizaje significativo

Actualment hi ha una gran quantitat de treballs relacionats amb nous models i estils d'aprenentatge i instrucci?? matem??tica. En el cas de l'??rea que abasta la instrucci?? matem??tica aplicada, hi ha menys informaci?? d'??xit i treball sobre aquest tema. Aix?? ocorre en l'assignatura Teoria d'Aut??mats (TA) que s'imparteix en el quart semestre a la carrera d'Enginyeria en Computaci?? de l???ESIME - Culhuacan, de l???IPN de M??xic. A causa de la seva naturalesa, la TA presenta dificultats en la comprensi?? dels conceptes i aplicacions pel que fa a l'alumne, de manera que consideram que mitjan??ant l'estrat??gia d'ensenyament amb mapes conceptuals, desenvolupats per J. Novak, hi haur?? un resultat favorable en dinamisme, comprensi?? i un aprenentatge significatiu a llarg termini que proporcionar?? elements s??lids per a assignatures conseg??ents. Es presenta la proposta elaborada pels professors que imparteixen l'assignatura i exercicis desenvolupats per 83 alumnes.

Aplicaci??n de mapas conceptuales en ingenier??a en computaci??n para evaluar aprendizaje significativo

Resumen tomado de la publicaci??n

Os missionários da Educação e o Instituto Ponte Nova da Bahia

Durante cem anos – 1871 a 1971 – os missionários da Missão Central do Brasil, vinculados à Igreja Presbiteriana do Norte dos Estados Unidos (PCUSA), partindo da Bahia, organizaram igrejas, escolas e hospitais em sua área de jurisdição – Sergipe, Mato Grosso, Goiás e norte de Minas Gerais. Verifi cando a realidade do hinterland brasileiro, William Alfred Waddell propôs um novo tipo de instituição educacional, distinta do modelo do Mackenzie College, de São Paulo: uma escola secundária rural, que ofereceria os cursos normal, preparatório de pastores, auxiliar de enfermagem e técnico agrícola. O IPN, como fi cou conhecido o Instituto Ponte Nova, foi fundado pela Missão em 1906, a qual organizou e subsidiou até 1971, além da escola, uma igreja e uma escola de auxiliar de enfermagem, a primeira escola do gênero na Bahia, ao lado do Grace Memorial Hospital. O sucesso daquele complexo institucional, integrando religião, educação e saúde, levou a Missão a organizar um projeto denominado “Escolas Ponte Nova”. Em 1926, a Missão já tinha aberto no território de sua jurisdição, sete escolas naquele modelo proposto e quatro hospitais.

Effect of storage in artificial saliva and thermal cycling on Knoop hardness of resin denture teeth

Purpose: This study aimed to evaluate the effect of different storage periods in artificial saliva and thermal cycling on Knoop hardness of 8 commercial brands of resin denture teeth. Methods: Eigth different brands of resin denture teeth were evaluated (Artplus group, Biolux group, Biotone IPN group, Myerson group, SR Orthosit group, Trilux group, Trubyte Biotone group, and Vipi Dent Plus group). Twenty-four teeth of each brand had their occlusal surfaces ground flat and were embedded in autopolymerized acrylic resin. After polishing, the teeth were submitted to different conditions: (1) immersion in distilled water at 37 ± 2 °C for 48 ± 2. h (control); (2) storage in artificial saliva at 37 ± 2 °C for 15, 30 and 60 days, and (3) thermal cycling between 5 and 55 °C with 30-s dwell times for 5000 cycles. Knoop hardness test was performed after each condition. Data were analyzed with two-way ANOVA and Tukey's test (α= .05). Results: In general, SR Orthosit group presented the highest statistically significant Knoop hardness value while Myerson group exhibited the smallest statistically significant mean (P< .05) in the control period, after thermal cycling, and after all storage periods. The Knoop hardness means obtained before thermal cycling procedure (20.34 ± 4.45 KHN) were statistically higher than those reached after thermal cycling (19.77 ± 4.13 KHN). All brands of resin denture teeth were significantly softened after storage period in artificial saliva. Conclusion: Storage in saliva and thermal cycling significantly reduced the Knoop hardness of the resin denture teeth. SR Orthosit denture teeth showed the highest Knoop hardness values regardless the condition tested. © 2010 Japan Prosthodontic Society.

Effect of immersion cleansers on the bond strength between a denture base resin and acrylic resin teeth

The aim of the present study was to assess the shear bond strength between a heat-polymerized denture base resin and acrylic resin teeth after immersion in different denture cleansers by simulating a 180-day use. Two acrylic teeth (Biotone, Biotone IPN, Dentsply Ind. e Com., Rio de Janeiro, RJ, Brazil) were chosen for bonding to a heat-polymerized denture base resin (Lucitone 550- Dentsply Ind. e Com., Rio de Janeiro, RJ, Brazil). Eighty specimens were produced and divided into eight groups (n=10) according to their experimental condition (distilled water, 2% chlorhexidine digluconate, 1% sodium hypochlorite and Corega Tabs). Shear bond strength tests (MPa) were performed with a universal testing machine at a crosshead speed of 0.5 mm/min. Data were analyzed by two-way analysis of variance (ANOVA) and Student-Newman-Keuls' multiple comparisons post hoc analysis (α=.05). The shear bond strength results revealed statistically significant differences between the groups. For the Biotone IPN tooth, significantly lower shear bond strength values were found for the group immersed in sodium-perborate solution (4.48±2.18 MPa) than for the group immersed in distilled water (control group) (10.83±1.84 MPa). For Biotone, significantly higher bond strength values (10.04±3.28 MPa) were found for the group immersed in Corega Tabs than for the control group (5.45±2.93 MPa). The immersion in denture cleanser solutions was more detrimental to the conventional acrylic denture tooth (Biotone) than to the highly cross-linked denture tooth (Biotone IPN). However, this effect was not observed for the groups immersed in Corega Tabs solution, regardless of the type of denture tooth. © 2013 Elsevier Ltd.

Determinação dos níveis séricos e urinários da Interleucina 8 em recém-nascidos prematuros com sepse tardia

Pós-graduação em Pediatria - FMB

Color degradation of acrylic resin denture teeth as a function of liquid diet: ultraviolet-visible reflection analysis

The effect of different beverages on acrylic resin denture teeth color degradation is evaluated. Ten acrylic resin denture teeth brands were evaluated: Art Plus (AP), Biolux (BX), Biotone IPN (BI), Magister (MG), Mondial 6 (MD), Premium 6 (PR), SR Vivodent PE (SR), Trilux (TR), Trubyte Biotone (TB), and Vipi Dent Plus (VP). Teeth were immersed in staining solutions (coffee, cola, and orange juice) or artificial saliva (control) (n = 6) for 1, 7, 15, or 30 days. Specimen colors were evaluated spectrophotometrically based on the Commission Internationale d'Eclairage L*a*b* system. Color differences (Delta E) were calculated between the baseline and post-staining results. Data were evaluated by analysis of variance and Tukey test (alpha = 0.05). BI (1.82 +/- 0.95) and TR (1.78 +/- 0.72) teeth exhibited the greatest Delta E values, while BX (0.88 +/- 0.43) and MD (1.09 +/- 0.44) teeth were the lowest, regardless of solution and measurement period, and were different from BI and TR teeth (P < 0.05). Cola and coffee promoted higher denture teeth color alterations than orange juice and saliva (P < 0.05). Saliva generated the lowest denture teeth color alterations. Greater immersion times caused higher denture teeth color changes. The lifespan of removable dentures and the aesthetic satisfaction of several edentulous patients may be increased with the use of stain-resistant artificial denture teeth. (C) The Authors.

Search for Gravitational Waves Associated with gamma-ray Bursts Detected by the Interplanetary Network

We present the results of a search for gravitational waves associated with 223 gamma-ray bursts (GRBs) detected by the InterPlanetary Network (IPN) in 2005-2010 during LIGO's fifth and sixth science runs and Virgo's first, second, and third science runs. The IPN satellites provide accurate times of the bursts and sky localizations that vary significantly from degree scale to hundreds of square degrees. We search for both a well-modeled binary coalescence signal, the favored progenitor model for short GRBs, and for generic, unmodeled gravitational wave bursts. Both searches use the event time and sky localization to improve the gravitational wave search sensitivity as compared to corresponding all-time, all-sky searches. We find no evidence of a gravitational wave signal associated with any of the IPN GRBs in the sample, nor do we find evidence for a population of weak gravitational wave signals associated with the GRBs. For all IPN-detected GRBs, for which a sufficient duration of quality gravitational wave data are available, we place lower bounds on the distance to the source in accordance with an optimistic assumption of gravitational wave emission energy of 10(-2)M(circle dot)c(2) at 150 Hz, and find a median of 13 Mpc. For the 27 short-hard GRBs we place 90% confidence exclusion distances to two source models: a binary neutron star coalescence, with a median distance of 12 Mpc, or the coalescence of a neutron star and black hole, with a median distance of 22 Mpc. Finally, we combine this search with previously published results to provide a population statement for GRB searches in first-generation LIGO and Virgo gravitational wave detectors and a resulting examination of prospects for the advanced gravitational wave detectors.

Effect of polymerization methods and thermal cycling on color stability of acrylic resin denture teeth

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Bond strength of artificial teeth attached to a microwave-polymerized denture base resin after immersion in disinfectant solutions

To evaluate the bond strength between two types of acrylic resin teeth and a microwave denture base resin after immersion in disinfectant solutions for 180 days. Eighty specimens made of acrylic resin teeth (Biotone and Biotone IPN) attached to a microwave polymerized denture base resin (Nature-Cryl MC) were divided into eight groups (n = 10) according to the treatment (distilled water-control, 2% chlorhexidine digluconate, 1% sodium hypochlorite and sodium perborate solution-Corega Tabs). The shear strength tests (MPa) were carried out using a universal testing machine with a 0.5 mm/min speed. Data analysis was performed using ANOVA and multiple comparison Student-Newman-Keuls post hoc test (α = 0.05). Biotone IPN showed similar results among the groups (distilled water, 8.25 ± 1.81 MPa; chlorhexidine, 7.81 ± 3.34 MPa; hypochlorite, 7.75 ± 3.72 MPa; and Corega Tabs, 7.58 ± 2.27 MPa, whereas Biotone showed significantly lower shear bond strength values for the groups immersed in Corega Tabs (5.25 ± 3.27 MPa) and chlorhexidine (6.08 ± 2.35 MPa). Soaking the dentures in 1% sodium hypochlorite could be recommended as a disinfectant solution for dentures fabricated with conventional acrylic resin denture teeth and microwave denture base resin. For dentures fabricated with IPN teeth and microwave denture base resin, all the soaking solutions evaluated in this study could be suggested to denture wearers.

Alcances y limitaciones actuales de la actividad experimental en escuelas de Enseñanza Media de la provincia Santiago de Cuba: criterios de alumnos y profesores

El propósito de este estudio es explorar el estado actual de desarrollo de las actividades experimentales en la asignatura de Física en escuelas de Enseñanza Media de la provincia de Santiago de Cuba ya que constituye un aspecto medular en la construcción del conocimiento científico. Para la recogida de la información se utilizaron dos instrumentos: una encuesta y una entrevista que fueron aplicadas a 268 alumnos y 18 profesores de cinco escuelas con entornos socioculturales diferentes. Los datos obtenidos de las encuestas de ambos sujetos están referidos a: la existencia o no de infraestructura de laboratorio en las escuelas, las características de sus participaciones en los laboratorios y la frecuencia de realización de los mismos. Complementan esta información sus opiniones expresadas en las respuestas a las entrevistas, donde se destaca el papel que atribuyen a los experimentos en el proceso de enseñanza-aprendizaje. Los resultados indican un incremento en la motivación y en la asimilación de los contenidos por parte de los alumnos que participaron en las demostraciones experimentales en las escuelas con infraestructura de laboratorio. Se manifiestan también limitaciones en el orden material con énfasis en las escuelas más alejadas del centro de la ciudad de Santiago de Cuba y de preparación de los profesores para una eficiente utilización del instrumental que poseen en función de la docencia.