Metadatos transformados. Archivos digitales, la web semántica y el nuevo paradigma de la catalogación

Actas de las Quintas Jornadas Imagen, Cultura y Tecnología celebradas del 3 al 5 de julio de 2006 en la Universidad Carlos III de Madri

Ensayos, ideas y retratos

La Universidad Nacional Autónoma de México presenta en este tomo de la Biblioteca del Estudiante Universitario una selección de las obras del doctor José María Luis Mora. Más que historiador, Mora fue un profundo ensayista que acertó a fijar con presición, a veces luminosa, muchas de las características esenciales del panorama mexicano. Criollo y descendiente de opulentos propietarios rurales, parecía destinado por su educación y por su cuna a defender fervorosamente los privilegios de la casta feudal a que pertenecieron sus antepasados. Las barreras que acumuló la colonia no impidieron que superase las limitaciones de su origen; en la exposición del programa político del "partido del progreso", alcanzó alturas pocas veces holladas por los escritores políticos de México. La burguesía librepensadora y antimilitarista de nuestro torturado XIX, tuvo en él su intérprete más lúcido. Discutido con encono hace años, muchas de sus afirmaciones conservan plena vigencia en nuestros días. Su caso nos obliga a admitir que el análisis sereno de los fenómenos sociales puede llevar a resultados que alcanzan el valor de profecías. La voz de Mora figura con honor entre las que nos han dejado un mensaje más limpio y perdurable

Development of an Emergency Radio Beacon for Small Unmanned Aerial Vehicles

Emergency locator transmitters (ELTs) used to locate manned aircrafts are not well suited to find and recover small crashed unmanned aerial vehicles (UAVs). ELTs utilize an international satellite system for search and rescue (Cospas-Sarsat System), which should leverage its expensive resources to save lives as a priority. Besides, ELTs are too big and heavy to be used within small UAVs. Some of the existing solutions for this problem are based on receivers that detect signal strength, which may be a long and tedious process not suitable for user needs. Others do not have enough range or require radio license and expensive amateur radio receivers. This paper presents an emergency radio beacon specifically designed to locate small UAVs. It is triggered automatically in the event of a crash and allows finding and recovering a crashed UAV in a fast and simple way. It meets not only the required specifications of user-friendliness, size and weight of this kind of application, but also it is a high precision and low cost device. Besides, it has enough range and endurance. The experiments carried out show the operation of the proposed system

Temporomandibular disorders: the habitual chewing side syndrome

Background:Temporomandibular disorders are the most common cause of chronic orofacial pain, but, except where theyoccur subsequent to trauma, their cause remains unknown. This cross-sectional study assessed chewing function (habitualchewing side) and the differences of the chewing side and condylar path and lateral anterior guidance angles in participantswith chronic unilateral temporomandibular disorder. This is the preliminary report of a randomized trial that aimed to testthe effect of a new occlusal adjustment therapy.Methods:The masticatory function of 21 randomly selected completely dentate participants with chronic temporoman-dibular disorders (all but one with unilateral symptoms) was assessed by observing them eat almonds, inspecting the lateralhorizontal movement of the jaw, with kinesiography, and by means of interview. The condylar path in the sagittal plane andthe lateral anterior guidance angles with respect to the Frankfort horizontal plane in the frontal plane were measured onboth sides in each individual.Results:Sixteen of 20 participants with unilateral symptoms chewed on the affected side; the concordance (Fisher’s exacttest, P = .003) and the concordance-symmetry level (Kappa coefficientk= 0.689; 95% confidence interval [CI], 0.38 to 0.99;P = .002) were significant. The mean condylar path angle was steeper (53.47(10.88) degrees versus 46.16(7.25) degrees;P = .001), and the mean lateral anterior guidance angle was flatter (41.63(13.35) degrees versus 48.32(9.53) degrees P = .036)on the symptomatic side.Discussion:The results of this study support the use of a new term based on etiology, ‘‘habitual chewing side syndrome’’,instead of the nonspecific symptom-based ‘‘temporomandibular joint disorders’’; this denomination is characterized inadults by a steeper condylar path, flatter lateral anterior guidance, and habitual chewing on the symptomatic sideThis study was financed with a grant PI11/02507 from the Institute of Health Carlos III of the Ministry of Science and Innovation of the Government of Spain. It was completed with the equipment granted by the General Directorate of Universities and Research; Department of Education and University. Xunta de Galicia. Official Journal No. 143 Galicia, July 22, 1996. And the Department of Innovation, Industry and Commerce. Xunta de Galicia, April 30, 2004S

mTOSSIM: A simulator that estimates battery lifetime in wireless sensor networks

Knowledge of the battery lifetime of the wireless sensor network is important for many situations, such as in evaluation of the location of nodes or the estimation of the connectivity, along time, between devices. However, experimental evaluation is a very time-consuming task. It depends on many factors, such as the use of the radio transceiver or the distance between nodes. Simulations reduce considerably this time. They allow the evaluation of the network behavior before its deployment. This article presents a simulation tool which helps developers to obtain information about battery state. This simulator extends the well-known TOSSIM simulator. Therefore it is possible to evaluate TinyOS applications using an accurate model of the battery consumption and its relation to the radio power transmission. Although an specific indoor scenario is used in testing of simulation, the simulator is not limited to this environment. It is possible to work in outdoor scenarios too. Experimental results validate the proposed model.Junta de Andalucía P07-TIC-02476Junta de Andalucía TIC-570

Usando role playing na integração do conhecimento no processo ensino-aprendizagem em enfermagem: avaliação dos alunos

To assess role-playing as a methodology in the teaching-learning process for the Nursing Degree. To identify the attitude of nursing students towards role-playing. To analyze the response of students to their teaching-learning process after role-playing. Relationship is one of the main functions of nursing care in all fields, as it contributes to developing and coping with the various stimuli of life through therapeutic communication, which helps nurses know their role and how to behave according to the situation. Third-year students from the Nursing School of the “X”. Academic years 2006-2007 and 2007-2008. The reflexive nature of qualitative research is based on Symbolic Interactionism. The subject category chosen is role-playing and it is sorted into the subcategories and codes. Findings from the analysis of the summaries have allowed us to see what actually happens when using role-playing as a teaching-learning tool in nursing, why and what the consequences are.Evaluar el role-playing como metodología en el proceso de enseñanza-aprendizaje en la enseñanza del Grado de Enfermería. Identificar la actitud de los estudiantes de enfermería ante el role-playing. Analizar la respuesta de los estudiantes después de realizar el role-playing en su proceso de enseñanza-aprendizaje. La relación de ayuda es una de las funciones principales de los cuidados de enfermería, en todos los ámbitos con el fin de que se pueda desarrollar y hacer frente a los diversos estímulos de la vida a través de la comunicación terapéutica, que permite a las enfermeras ver su rol con las personas como un marco para “saber estar” en la relación de ayuda. Estudiantes de tercer año de la Escuela de Enfermería de la “X”. Año académico 2006-2007 y 2007-2008. El carácter reflexivo de la investigación cualitativa está fundamentado en el Interaccionismo Simbólico. La categoría temática seleccionada, es la de role-playing que permite una clasificación de subcategorías y códigos. Los resultados del análisis de las síntesis nos han permitido identificar lo que sucede realmente con la utilización del role-playing como herramienta de enseñanza-aprendizaje en enfermería, por qué y cuáles son las consecuencias.Avaliar o role-playing como metodologia no proceso ensino-aprendizagem no ensino de graduação de enfermagem. Identificar as atitudes dos estudantes de enfermagem relacionadas ao role-playing. Analisar a resposta dos alunos no proceso ensinoaprendizagem após realizarem o role-playing. a relação de ajuda é uma das principaisfunções dos cuidados de enfermagem, em todas as dimensões e, através da comunicação terapêutica busca o desenvolvimento das pessoas para enfrentar os diversos estímulos da vida. A comunicação terapêutica permite às enfermeiras reconhecerem seu papel, como um marco para “saber estar” na relação de ajuda. Estudantes de terceiro ano da Escola de Enfermagem “X” nos períodos letivos de 2006-2007 e 2007-2008. A natureza reflexiva desta pesquisa qualitativa baseia-se no interacionismo simbólico. A categoria temática selecionada foi o role-playing, que permitiuuma classificação em subcategorias e códigos. Os resultados permitiram identificar o que realmente acontece com o uso do role-playing como uma ferramenta de ensino e aprendizagem em enfermagem, porquê e quais suas consequências

Las sociedades de capital riesgo en Andalucía. Una modelización causal

Las Sociedades de Capital Riesgo (SCR) se constituyen en una modalidad de inversión temporal que trata de proveer recursos a pequeñas y medianas empresas no financieras y que no coticen en bolsa. En el siguiente artículo pretendemos realizar una descripción sobre el funcionamiento de las Sociedades de Capital Riesgo en Andalucía, para lo cual, definiremos, en primer lugar, las principales variables que caracterizan el desarrollo y desenvolvimiento de su actividad en la Comunidad Autónoma Andaluza. A continuación, estas variables nos servirán de apoyo para la representación gráfica de la estructura interna del sistema que forman las SCR andaluzas, de manera que consigamos establecer las interrelaciones esenciales que las caracterizan. Así, pues, habremos completado la etapa de conceptualización de la problemática que planteamos mediante Dinámica de Sistemas. PALABRAS CLAVE: Capital Riesgo, Empresas Participadas, Proyectos, Variables, Diagrama Causal. ABSTRACT Venture Capital constitutes an investisement temporary way that treat to contribute financial resources to no financial small business that don´t quote on the Stock Exchange. The present article pretends to describe the Venture Capital behaviour in Andalusia. We define, first of all, the principal variables that characterise the development of this activity in Andalusian Autonomous Region. Then, these variables will be useful for graphic display of system internal structure formed by andalusians venture capital, so we got to set up the essentials interrelations that characterise them. So, we´ll have completed the conceptualisation stage of planed problems by Dynamic Systems.Venture Capital constitutes an investisement temporary way that treat to contribute financial resources to no financial small business that don´t quote on the Stock Exchange. The present article pretends to describe the Venture Capital behaviour in Andalusia. We define, first of all, the principal variables that characterise the development of this activity in Andalusian Autonomous Region. Then, these variables will be useful for graphic display of system internal structure formed by andalusians venture capital, so we got to set up the essentials interrelations that characterise them. So, we´ll have completed the conceptualisation stage of planed problems by Dynamic Systems

Sincronización de estros en ovejas mediante protocolo de 6 días con CIDR de primera, segunda y tercera reutilización

Estrus synchronization( is a vital strategy in sheep production and is accomplished most often via controlled internal drug release (CIDR) devices. Reuse of CIDR devices can reduce operating costs and ewe exposure to progesterone (P4), but remains controversial. A comparison was made of the effects of new and reused natural progesterone-releasing intravaginal (CIDR) devices in six-day protocols on reproductive performance variables and blood serum progesterone concentrations in multiparous ewes. A total of 172 sheep (average body weight = 59 kg) were randomly distributed into four treatments: CIDR1 (control group, new devices), CIDR2 (second-use), CIDR3 (third-use) and CIDR4 (fourth-use). The variables ewes in estrus, pregnancy rate, fertility rate and parturition type did not differ (P>0.05) between treatments. Estrus onset was later (P≤0.05) in CIDR1 (40 ± 10 h) than in CIDR2 (31 ± 9 h).  Ewes in estrus ranged from 93 to 100 %,  average pregnancy rate was 80.8 %, average fertility  rate was 80.2 % and the prolificacy index was 1.26. The single delivery rate was higher (P≤0.05) than the double delivery rate in all four treatments. Intravaginal CIDR devices can be used in ewes up to four times in six-day estrus synchronization protocols without affecting reproductive variables.El objetivo del estudio fue comparar el efecto de dispositivos intravaginales liberadores de progesterona natural (CIDR) nuevos y reutilizados en protocolos de 6 días sobre el desempeño reproductivo y en las concentraciones de progesterona en suero sanguíneo de ovejas multíparas. Un total de 172 ovejas con peso corporal promedio de 59 kg se distribuyeron al azar en cuatro tratamientos: CIDR1 (grupo testigo con dispositivos nuevos) y CIDR2, CIDR3, CIDR4 (con 6, 12 y 18 días de uso, respectivamente). En cuanto al inicio de estro, hubo diferencia (P≤0.05) únicamente entre el tratamiento con CIDR nuevos (40 ± 10 h) y CIDR de segundo uso (31 ± 9 h). En las variables presencia de estro, porcentaje de gestación, porcentaje de fertilidad y tipo de parto no se obtuvieron diferencias significativas (P>0.05) entre tratamientos. La presencia de estro osciló entre 93 y 100 %, el valor promedio de gestación fue 80.8 %, 80.2 % para fertilidad y 1.26 para el índice de prolificidad. Los porcentajes de partos sencillos fueron mayores (P≤0.05) a los partos dobles en los cuatro tratamientos. Se concluye que el uso de CIDR en protocolos de 6 días permite que los dispositivos sean utilizados hasta por cuatro ocasiones con buenos resultados

Inflammatory infiltrate in skeletal muscle injected with Bothrops asper venom

The time-course and composition of inflammatory infiltrate in mouse gastrocnemius injected with Bothrops asper venom was studied. The venom induced myonecrosis, and a prominent decrease in muscle levels of creatine kinase (CK) as early as 3 hr after envenomation. Inflammatory infiltrate was scarce by 6 hr. but increased markedly at 24, 48 and 72 hr. Samples of infiltrate obtained at 6 and 24 hr contained polymorphonuclear leucocytes as the predominant cell type, whereas at 48 hr and 72 hr the relative number of macrophages increased. Inflammatory cells were located within necrotic muscle cells, as well as in the interstitial space, but there were some necrotic areas devoid of inflammatory cells even one week after envenomation. When correlating the presence of inflammatory cells with degradation of myofibrillar proteins, it was observed that at 6 hr there was little muscle protein degradation. By 48 hr a decrease in "non collagen" proteins was observed, together with a reduction in some myofibrillar components, as judged by electrophoresis. Proteolytic enzymes of inflammatory cells may play an important role in myofibrillar protein degradation after myonecrosis induced by B. asper venom.UCR::Vicerrectoría de Investigación::Unidades de Investigación::Ciencias de la Salud::Instituto Clodomiro Picado (ICP