Improving a Satellite Mission System by means of a Semantic Grid Architecture

The use of a semantic grid architecture can make easier the deployment of complex applications, in which several organizations are involved and diverse resources are shared. This paper presents the application of the architecture defined in the Ontogrid project (S-OGSA) into a scenario for the analysis of the quality of the products of satellite missions

MANEJO POSTCOSECHA DEL PLÁTANO (Musa X paradisiaca AAA subgroup Cavendish) EN TECOMÁN, COLIMA, MÉXICO

Objective: Analyze the post-harvest process by which the banana (Musa x paradisiaca AAA subgroup Cavendish) passes before its commercialization, to identify the activities that should be better served. Design / methodology / approach: The information was collected through the survey to the workers and a checklist in the field, which was applied to the 32% groups of pakers in the region. Results: The main result was the characterization of the activities of the banana post-harvest process in Cerro de Ortega Tecomán Colima, Mexico. Study limitations / implications: An important limitation for the investigation was the insecurity during the field work which was present derived from organized crime settled in the area. Findings/conclusions: The post-harvest process of the banana is very important because in this point we can prevent diseases such as "rottenness of the crown", which means that the fruit has less shelf life also it is essential to final presentation.Objetivo: Analizar el proceso postcosecha por el cual pasa el plátano (Musa x paradisiaca AAA subgroup Cavendish) antes de su comercialización, para identificar las actividades que deben de ser mejor atendidas. Diseño/metodología/aproximación: La información se obtuvo a través de la aplicación de una encuesta a los trabajadores y una lista de verificación en campo, la cual se aplicó al 32% de los empacadores de la región. Resultados: Se obtuvo como principal resultado la caracterización de las actividades del proceso postcosecha del plátano en Cerro de Ortega Tecomán Colima, México. Limitaciones del estudio/implicaciones: Una limitante importante para la investigación fue la inseguridad durante el trabajo de campo la cual estuvo presente derivada del crimen organizado asentado en la zona. Hallazgos/conclusiones: El proceso postcosecha de la fruta del plátano es muy importante debido a que es en este punto cuando se previenen enfermedades mejorando la vida de anaquel y valor comercial

On the warp drive space-time

In this paper the problem of the quantum stability of the two-dimensional warp drive spacetime moving with an apparent faster than light velocity is considered. We regard as a maximum extension beyond the event horizon of that spacetime its embedding in a three-dimensional Minkowskian space with the topology of the corresponding Misner space. It is obtained that the interior of the spaceship bubble becomes then a multiply connected nonchronal region with closed timelike curves and that the most natural vacuum allows quantum fluctuations which do not induce any divergent behaviour of the re-normalized stress-energy tensor, even on the event (Cauchy) chronology horizon. In such a case, the horizon encloses closed timelike curves only at scales close to the Planck length, so that the warp drive satisfies the Ford's negative energy-time inequality. Also found is a connection between the superluminal two-dimensional warp drive space and two-dimensional gravitational kinks. This connection allows us to generalize the considered Alcubierre metric to a standard, nonstatic metric which is only describable on two different coordinate patchesComment: 7 pages, minor comment on chronology protection added, RevTex, to appear in Phys. Rev.

Perfil de ingreso de los alumnos de Enfermería, Facultades de Estudios Superiores Iztacala y Zaragoza, UNAM

ResumenIntroducciónLa Universidad tiene como una de sus tareas conocer a los estudiantes, ya que en la medida que nuestro sistema de educación logre tener mayor información sobre el perfil de éstos y sus trayectorias escolares, se podrán diseñar e implementar políticas novedosas y funcionales que atiendan las necesidades específicas de su población.ObjetivoAnalizar el perfil de los estudiantes que ingresan a la Licenciatura en Enfermería de las Facultades de Estudios Superiores (FES) Iztacala y Zaragoza.MétodoEstudio descriptivo-transversal, con estudiantes de primer ingreso de la generación 2011-1 de la FES Zaragoza e Iztacala. La población de estudio fueron 600 alumnos. La recolección de la información fue a través de un cuestionario. La confiabilidad del instrumento fue de 0.875 con la prueba de Alfa de Cronbach. Para el manejo de la información se elaboró una base de datos con el programa SPSS® y se utilizó estadística descriptiva.ResultadosEl 49% de alumnos proviene de pase reglamentado, el promedio de ingreso es de 8.1 a 9.0; en el 61% Enfermería fue primera elección; el nivel socioeconómico de los alumnos es bajo; en el 74% el promedio durante el primer año fue de 8.0 a 10.0.DiscusiónA diferencia de otras Carreras de la Universidad Nacional Autónoma de México (UNAM), la de Enfermería da cabida a casi el 50% de los aspirantes de escuelas externas a ella. Los alumnos aún cuando son de nivel socioeconómico bajo, reúnen características favorables para su trayectoria escolar, entre ellas, un buen promedio y que fueron admitidos en la Carrera que seleccionaron.AbstractIntroductionThe University has as one of its tasks to better know the profiles and trajectories of students, so that supporting innovative and functional policies can be designed and implemented.ObjectiveTo analyze the profile of students enrolling into the Nursing Undergraduate System at the Iztacala and Zaragoza Superior Studies Faculty.MethodBasic-descriptive study with freshmen students of the 2011 -I generation of the Nursing Bachelors Degree program at the FES Zaragoza and Iztacala. The population was 600 alumni. A questionnaire was used to gather data. The instrument reliability was equivalent to a 0.875 Cronbach Alpha score. A SPSS8 database was created and data were analyzed through descriptive statistics.ResultsThe 49% of the students came from the “automatic pass” format. The enrollment grade point average went from 8.1 to 9.0. For the 61% of the students, nursing was their first choice of major. The socioeconomic level of the students was low. The 76% of the students obtained a grade point average between 8.0 and 10.0 during all their freshman year.DiscussionUnlike other careers at the Universidad Nacional Autónoma de México (UNAM), Nursing accepts almost 50% of the prospects from external schools, situation which does not occur in other careers. Although the majority of students who entered have a low social-economical level, they have other favorable characteristics for their school trajectory such as a good grade point average and that they were accepted in the career that they chose

Tumor-Selective and Self-Activating Chemiluminescent Photosensitizers for Photodynamic Therapy

Application of light in chemistry presents an active field of research with a very promising outlook, particularly in technology and medicine. Molecules which mediate the transfer of light to another molecule (photosensitizers) are the cornerstone of exploitation of light. The current state of research and recent progress in applications of photosensitizers in diverse fields are documented in twelve chapters written by scientists from around the world. Chapter 1 gives a general overview on the applications of photosensitizers in synthetic organic chemistry. This review is followed by Chapters 2-7, which deal with the various applications of photosensitizers in medicine, in particular for photodynamic cancer therapy. The subsequent Chapters 8-12 cover different aspects of applications of photosensitizers in material science, such as for dye-sensitized solar cells and photo-responsive materials

Results for the Atlantic cod, roughhead grenadier, redfish, thorny skate and black dogfish of the Spanish Survey in the NAFO Div. 3L for the period 2003-2016

Since 2003, a stratified random spring bottom trawl survey was conducted by Spain in Division 3L of NAFO Regulatory Area (Flemish Pass). The surveys were carried out by the R/V “Vizconde de Eza” using bottom trawl net type Campelen. Entire series of mean catches, biomass and length distribution for Atlantic cod, roughhead grenadier, redfish, thorny skate and black dogfish are presented for the period 2003-2016.Postprin

Results for the Spanish Survey in the NAFO Regulatory Area of Division 3L for the period 2003-2015

Since 2003, a stratified random summer bottom trawl survey was conducted by Spain in the NAFO Regulatory Area of Division 3L (Flemish Pass). The surveys were carried out by the R/V “Vizconde de Eza” using bottom trawl net type Campelen 1800. Entire series of mean catches, biomass and length distribution for Greenland halibut, American plaice and witch flounder are presented for the period 2003-2015. Greenland halibut biomass and abundance estimates show an increasing trend since 2011, reaching the maximum values in the series in 2008 and 2014. In last years it can be seen a presence of juveniles (around 12-15 cm). American plaice biomass and abundance estimates present an increasing trend since 2010, reaching in 2015 the highest value in the series. Regarding witch flounder, the biomass and abundance increased in 2015, but there is no a clear trend in the whole period 2003-2015.Postprint0,000

Wormholes and Ringholes in a Dark-Energy Universe

The effects that the present accelerating expansion of the universe has on the size and shape of Lorentzian wormholes and ringholes are considered. It is shown that, quite similarly to how it occurs for inflating wormholes, relative to the initial embedding-space coordinate system, whereas the shape of the considered holes is always preserved with time, their size is driven by the expansion to increase by a factor which is proportional to the scale factor of the universe. In the case that dark energy is phantom energy, which is not excluded by present constraints on the dark-energy equation of state, that size increase with time becomes quite more remarkable, and a rather speculative scenario is here presented where the big rip can be circumvented by future advanced civilizations by utilizing sufficiently grown up wormholes and ringholes as time machines that shortcut the big-rip singularity.Comment: 11 pages, RevTex, to appear in Phys. Rev.

A Semantic Data Grid for Satellite Mission Quality Analysis

The combination of Semantic Web and Grid technologies and architectures cases the development of applications that share heterogeneous resource,, (data and computing elements) that belong to several organisations. The Aerospace domain has an extensive and heterogeneous network of facilities and institutions, with a strong need to share both data and computational resources for complex processing tasks. One such task is monitoring and data analysis for Satellite Missions. This paper presents a Semantic Data Grid for satellite missions, where flexibility, scalability, interoperability, extensibility and efficient development have been considered the key issues to be addressed