Propuesta de normalización bibliográfica para la creación de metadatos basados en Dublin Core en los Repositorios Universitarios del proyecto 3R

El proyecto de 3R-Red de Repositorios Universitarios de Recursos Digitales es un trabajo de investigación orientado a desarrollar un prototipo de Repositorios Universitarios (RU) dentro de la UNAM. Parte de su trabajo se centra en la elaboración de políticas de descripción bibliográfica para aquellos objetos digitales que conforman los RU adscritos al proyecto. Actualmente esta labor ha consistido en el análisis y valoración de la Iniciativa de Metadatos Dublin Core (DCMI por sus siglas en inglés), en tanto que es un protocolo de transferencia de metadatos adecuado a los requerimientos de 3R. Sin embargo, dada la ambigüedad que DCMI presenta al momento de asentar información en algunos de sus elementos —tales como título, creador, editor y colaborador—, se previó la necesidad de utilizar esquemas alternos que coadyuven a la consignación y normalización de la información sobre los objetos digitales que conforman los RU. Por lo tanto, el presente trabajo aborda de manera concreta el problema de la descripción bibliográfica y de información en los quince elementos que componen el núcleo de Dublin Core, en paticular cuatro de ellos, al tiempo que propone la utilización de esquemas de codificación alternos para la descripción bibliográfica, como es el caso de las Reglas de Catalogación Angloamericanas 2a. edición (RCA2) y diferentes normas ISO, con el fin de obtener un cuerpo de metadatos que permita la recuperación y el intercambio de información entre los distintos Repositorios Universitarios que integran el proyecto de 3R.

Quality of service in optical burst switching networks

Tese dout., Engenharia Electrónica e Computação, Universidade do Algarve, 2009

Desenvolvimento de filmes com microencapsulação de agentes naturais: aplicação na preservação de salmão

Dissertação de mestrado, Tecnologia dos Alimentos, Instituto Superior de Engenharia, Universidade do Algarve, 2015

Studienmotivation und Berufserwartungen von Studienanfängerinnen und Studienanfängern der Evangelischen Religions- und Gemeindepädagogik

Ziel der durchgeführten Untersuchung war es, Einsichten in die Studienmotivation und Berufserwartungen von Studienanfängern und -anfängerinnen der Evangelischen Religionspädagogik / Gemeindepädagogik zu erhalten. Heute bieten acht (Fach-) Hochschulen einen grundständigen, also in vollem Umfang berufsqualifizierenden Bachelorstudiengang Evangelische Religions- bzw. Gemeindepädagogik an, der zum kirchlichen Beruf einer Gemeindepädagogin oder eines Gemeindepädagogen bzw. eines Diakons oder einer Diakonin führen kann. Sechs dieser Studiengänge sehen heute eine Kombinationsmöglichkeit mit dem Studium der Sozialen Arbeit vor, die auch die staatliche Anerkennung als Sozialarbeiter bzw. Sozialpädagogin ermöglicht. Inwieweit sich dies auch auf die Wahl des Studienfachs Religions- und Gemeindepädagogik und auf die Studienmotivation auswirkt, war Gegenstand einer im Wintersemester 2011/12 durchgeführten Untersuchung. Warum entscheiden sich heute (zumeist) junge Menschen für ein religions- und gemeindepädagogisches Studium und welche Vorstellungen über ihre spätere Berufspraxis haben sie? Welche Rolle spielt für die Studienfachentscheidung die Möglichkeit des Erwerbs einer doppelten Qualifikation, die nicht notwendigerweise in eine spätere kirchliche Berufstätigkeit führen muss, sondern auch für den Bereich sozialer Arbeit in staatlichen Einrichtungen und bei freien Trägern qualifiziert? Um Antwort auf diese Fragen zu erhalten, wurden in einer Fragebogen-Erhebung die Studienanfänger und -anfängerinnen an acht Hochschulstandorten (Berlin, Bochum, Freiburg, Hannover, Kassel, Ludwigsburg, Moritzburg, Nürnberg) befragt. 221 von insgesamt 250 Studierenden im ersten Fachsemester beteiligten sich daran (88,4%).

New method for the simultaneous identification of pathogenic human viruses using multiplex PCR

Tese de mestrado. Biologia (Biologia Molecular e Genética). Universidade de Lisboa, Faculdade de Ciências, 2014

Replicating the Networking, Mentoring and Venture Creation Benefits of Entrepreneurship Centres on a Shoestring: A Student-centred Approach to Entrepreneurship Education and Venture Creation

As support for both university-level entrepreneurial education and the use of experiential learning methods to foster student entrepreneurs increases, so too have the number of university-established or affiliated entrepreneurship centers. The activity at the center of this study aimed to combine experiential learning methods with assets associated with entrepreneurship centers, including venture creation, networking, and mentoring. Students were invited to participate in a competition wherein they were guided through the business creation process and pitched their ideas to investor judges who chose the winner and provided capital start-up funding and consulting. This research puts forth that university faculty at institutions without entrepreneurship centers can organize experiences to provide the benefits of entrepreneurship centers. The study used interviews to find that many of the benefits of entrepreneurship centers were able to be replicated using this method. The project is outlined, outcomes are analyzed, and the results and lessons learned are discussed.

Elaboração de um plano de marketing cultural para o Museu de Marinha

Dissertação apresentada à Escola Superior de Comunicação Social para obtenção de grau de mestre em Publicidade e Marketing.

Determinantes do comportamento de compra online

Dissertação apresentada à Escola Superior de Comunicação Social para obtenção de grau de mestre em Publicidade e Marketing.

Analysis of polycyclic aromatic hydrocarbons in fish: optimisation and validation of microwave-assisted extraction

An accurate and sensitive method for determination of 18 polycyclic aromatic hydrocarbons (PAHs) (16 PAHs considered by USEPA as priority pollutants, dibenzo[a,l]pyrene and benzo[j]fluoranthene) in fish samples was validated. Analysis was performed by microwave-assisted extraction and liquid chromatography with photodiode array and fluorescence detection. Response surface methodology was used to find the optimal extraction parameters. Validation of the overall methodology was performed by spiking assays at four levels and using SRM 2977. Quantification limits ranging from 0.15–27.16 ng/g wet weight were obtained. The established method was applied in edible tissues of three commonly consumed and commercially valuable fish species (sardine, chub mackerel and horse mackerel) originated from Atlantic Ocean. Variable levels of naphthalene (1.03–2.95 ng/g wet weight), fluorene (0.34–1.09 ng/g wet weight) and phenanthrene (0.34–3.54 ng/g wet weight) were detected in the analysed samples. None of the samples contained detectable amounts of benzo[a]pyrene, the marker used for evaluating the occurrence and carcinogenic effects of PAHs in food.

Molecular simulation of gas adsorption equilibria in nanoporous materials

This work is divided into two distinct parts. The first part consists of the study of the metal organic framework UiO-66Zr, where the aim was to determine the force field that best describes the adsorption equilibrium properties of two different gases, methane and carbon dioxide. The other part of the work focuses on the study of the single wall carbon nanotube topology for ethane adsorption; the aim was to simplify as much as possible the solid-fluid force field model to increase the computational efficiency of the Monte Carlo simulations. The choice of both adsorbents relies on their potential use in adsorption processes, such as the capture and storage of carbon dioxide, natural gas storage, separation of components of biogas, and olefin/paraffin separations. The adsorption studies on the two porous materials were performed by molecular simulation using the grand canonical Monte Carlo (μ,V,T) method, over the temperature range of 298-343 K and pressure range 0.06-70 bar. The calibration curves of pressure and density as a function of chemical potential and temperature for the three adsorbates under study, were obtained Monte Carlo simulation in the canonical ensemble (N,V,T); polynomial fit and interpolation of the obtained data allowed to determine the pressure and gas density at any chemical potential. The adsorption equilibria of methane and carbon dioxide in UiO-66Zr were simulated and compared with the experimental data obtained by Jasmina H. Cavka et al. The results show that the best force field for both gases is a chargeless united-atom force field based on the TraPPE model. Using this validated force field it was possible to estimate the isosteric heats of adsorption and the Henry constants. In the Grand-Canonical Monte Carlo simulations of carbon nanotubes, we conclude that the fastest type of run is obtained with a force field that approximates the nanotube as a smooth cylinder; this approximation gives execution times that are 1.6 times faster than the typical atomistic runs.

Subgroup analyses in randomised controlled trials: cohort study on trial protocols and journal publications

OBJECTIVE: To investigate the planning of subgroup analyses in protocols of randomised controlled trials and the agreement with corresponding full journal publications. DESIGN: Cohort of protocols of randomised controlled trial and subsequent full journal publications. SETTING: Six research ethics committees in Switzerland, Germany, and Canada. DATA SOURCES: 894 protocols of randomised controlled trial involving patients approved by participating research ethics committees between 2000 and 2003 and 515 subsequent full journal publications. RESULTS: Of 894 protocols of randomised controlled trials, 252 (28.2%) included one or more planned subgroup analyses. Of those, 17 (6.7%) provided a clear hypothesis for at least one subgroup analysis, 10 (4.0%) anticipated the direction of a subgroup effect, and 87 (34.5%) planned a statistical test for interaction. Industry sponsored trials more often planned subgroup analyses compared with investigator sponsored trials (195/551 (35.4%) v 57/343 (16.6%), P<0.001). Of 515 identified journal publications, 246 (47.8%) reported at least one subgroup analysis. In 81 (32.9%) of the 246 publications reporting subgroup analyses, authors stated that subgroup analyses were prespecified, but this was not supported by 28 (34.6%) corresponding protocols. In 86 publications, authors claimed a subgroup effect, but only 36 (41.9%) corresponding protocols reported a planned subgroup analysis. CONCLUSIONS: Subgroup analyses are insufficiently described in the protocols of randomised controlled trials submitted to research ethics committees, and investigators rarely specify the anticipated direction of subgroup effects. More than one third of statements in publications of randomised controlled trials about subgroup prespecification had no documentation in the corresponding protocols. Definitive judgments regarding credibility of claimed subgroup effects are not possible without access to protocols and analysis plans of randomised controlled trials.

Fluoroscopic-Guided Radial Endobronchial Ultrasound Without Guide Sheath For Peripheral Pulmonary Lesions: A Safe And Efficient Combination.

BACKGROUND: Several guidelines recommend computed tomography scans for populations with high-risk for lung cancer. The number of individuals evaluated for peripheral pulmonary lesions (PPL) will probably increase, and with it non-surgical biopsies. Associating a guidance method with a target confirmation technique has been shown to achieve the highest diagnostic yield, but the utility of bronchoscopy with radial probe endobronchial ultrasound using fluoroscopy as guidance without a guide sheath has not been reported. METHODS: We conducted a retrospective analysis of bronchoscopy with radial probe endobronchial ultrasound using fluoroscopy procedures for the investigation of PPL performed by experienced bronchoscopists with no specific previous training in this particular technique. Operator learning curves and radiological predictors were assessed for all consecutive patients examined during the first year of application of the technique. RESULTS: Fifty-one PPL were investigated. Diagnostic yield and visualization yield were 72.5 and 82.3% respectively. The diagnostic yield was 64.0% for PPL ≤20mm, and 80.8% for PPL>20mm. No false-positive results were recorded. The learning curve of all diagnostic tools showed a DY of 72.7% for the first sub-group of patients, 81.8% for the second, 72.7% for the third, and 81.8% for the last. CONCLUSION: Bronchoscopy with radial probe endobronchial ultrasound using fluoroscopy as guidance is safe and simple to perform, even without specific prior training, and diagnostic yield is high for PPL>and ≤20mm. Based on these findings, this method could be introduced as a first-line procedure for the investigation of PPL, particularly in centers with limited resources.

L'Écho de Paris

1885/02/17 (Numéro 343).