Identificación de errores cometidos en el proceso de despliegue de la política: caso Megaexpress S.A.S y Merca express LTDA.

La presente investigación evalúo errores gerenciales en Megaexpress S.A.S. y Merca Express Ltda., empresas catalogadas en el grupo de micro, pequeñas y medianas empresas (mipymes) en Bogotá, Colombia; pertenecientes al sector de consumo masivo, la primera en venta al detalle o retail y la segunda en distribución a mayoristas. La investigación partió del interés de los investigadores por conocer sobre la relación entre la academia y el sector real y en cómo la academia ayuda a los gerentes a mejorar sus prácticas en la toma de decisiones al momento de enfrentar la realidad empresarial. El estudio de errores gerenciales inicio en el análisis de teoría administrativa sobre el tema abordado por los diferentes autores que conforman el marco referencial en cuanto a cuáles eran los errores en los que incurrían los gerentes y su solución o mejora. Los investigadores utilizaron la herramienta, matriz de convergencias y divergencias, para dicho análisis y de la que se desprende la encuesta, instrumento de investigación, aplicada a gerentes y jefes con personal a cargo de Megaexpress S.A.S. y Mercaexpress Ltda., con el fin de corroborar en que errores incurrían las empresas y llegar a dar recomendaciones para mejorar sus procesos en la toma de decisiones y así contribuir a la perdurabilidad de las empresas.

La internalización del régimen internacional para el manejo de las relaciones laborales, por parte de las empresas transnacionales en los países periféricos. Estudio de caso: DHL Express (Ecuador) S.A.

Este trabajo explora las directrices globales como instrumentos, que proponen normas y principios en materia de empleo, formación, condiciones de trabajo y relaciones laborales por parte de las empresas transnacionales, propuestas en el marco de la Organización para la Cooperación y el Desarrollo Económico (OCDE) y la Organización Internacional del Trabajo (OIT), articulando como un régimen internacional del trabajo parcial, en construcción o inacabado, donde su eficacia varía según el área de temas y tiempo. En este trabajo, se analizan, la forma en que se aplican las directrices en el funcionamiento de las empresas transnacionales en los países periféricos, los grados de complementariedad y competencia en el comercio internacional y la responsabilidad social. Así como también, las actuaciones en materia laboral, mediante un estudio de caso sobre una empresa transnacional; se ha considerado tanto el contenido de las iniciativas como el proceso de diseño, ejecución y evaluación de las mismas.

Estudio de la gestión de riesgo de crédito para empresas no financieras y propuesta de aplicación de una metodología de análisis de riesgo de crédito para los agentes de Western Union, para la empresa DHL Express Ecuador S.A. de la ciudad de Quito

El análisis del riesgo de crédito debe considerarse como un importante punto desencadenador de nuevas oportunidades de negocio para cualquier tipo de industria. Las características peculiares de cada tipo de emprendimiento despiertan varias incertidumbres en la administración, de este modo el reconocimiento profundo de los riesgos que se aceptan para impulsar las actividades comerciales es de interés relevante. El sector financiero a lo largo de la historia ha perfeccionado significativamente la administración de este riesgo, dado que es la razón de ser de su negocio, y para ellos han existido varios precedentes que le ha permitido tomar decisiones focalizadas al mejoramiento continuo de sus productos en pos de maximizar el valor de sus compañías. Para el sector comercial existe una desventaja comparativamente, que radica en el hecho de que no exista un marco normativo que regule el crédito que se concede a través la venta de sus productos o servicios, es decir que no existe un organismo que dicte normas claras de regulación y control. Se entiende como desventaja este hecho puesto que cada empresa deberá sentirse responsable de crear un modelo propio que se ajuste a sus necesidades de administración. A lo largo del presente estudio se analizan las similitudes y diferencias más significativas del manejo de este tipo de riesgo en dos sectores diferentes, el financiero y el comercial y se propone una metodología de administración de riesgo de crédito para una empresa comercial adoptando como mejores prácticas algunos de los lineamientos obligatorios para el sector financiero.

A solar storm observed from the Sun to Venus using the STEREO, Venus Express, and MESSENGER spacecraft

The suite of SECCHI optical imaging instruments on the STEREO-A spacecraft is used to track a solar storm, consisting of several coronal mass ejections (CMEs) and other coronal loops, as it propagates from the Sun into the heliosphere during May 2007. The 3-D propagation path of the largest interplanetary CME (ICME) is determined from the observations made by the SECCHI Heliospheric Imager (HI) on STEREO-A (HI-1/2A). Two parts of the CME are tracked through the SECCHI images, a bright loop and a V-shaped feature located at the rear of the event. We show that these two structures could be the result of line-of-sight integration of the light scattered by electrons located on a single flux rope. In addition to being imaged by HI, the CME is observed simultaneously by the plasma and magnetic field experiments on the Venus Express and MESSENGER spacecraft. The imaged loop and V-shaped structure bound, as expected, the flux rope observed in situ. The SECCHI images reveal that the leading loop-like structure propagated faster than the V-shaped structure, and a decrease in in situ CME speed occurred during the passage of the flux rope.We interpret this as the result of the continuous radial expansion of the flux rope as it progressed outward through the interplanetary medium. An expansion speed in the radial direction of ~30 km s-1 is obtained directly from the SECCHI-HI images and is in agreement with the difference in speed of the two structures observed in situ. This paper shows that the flux rope location can be determined from white light images, which could have important space weather applications.

MPJ express: Towards thread safe Java HPC

MPJ Express is a thread-safe Java messaging library that provides a full implementation of the mpiJava 1.2 API specification. This specification defines a MPI-like bindings for the Java language. We have implemented two communication devices as part of our library, the first, called niodev is based on the Java New I/O package and the second, called mxdev is based on the Myrinet eXpress library MPJ Express comes with an experimental runtitne, which allows portable bootstrapping of Java Virtual Machines across a cluster or network of computers. In this paper we describe the implementation of MPJ Express. Also, we present a performance comparison against various other C and Java messaging systems. A beta version of MPJ Express was released in September 2005.

MPJ express meets gadget: towards a java code for cosmological simulations

Gadget-2 is a massively parallel structure formation code for cosmological simulations. In this paper, we present a Java version of Gadget-2. We evaluated the performance of the Java version by running colliding galaxies simulation and found that it can achieve around 70% of C Gadget-2's performance.

Rat brain serotonin neurones that express neuronal nitric oxide synthase have increased sensitivity to the substituted amphetamine serotonin toxins 3,4-methylenedioxymethamphetamine and p-chloroamphetamine

Substituted amphetamines such as p-chloroamphetamine and the abused drug methylenedioxymethamphetamine cause selective destruction of serotonin axons in rats, by unknown mechanisms. Since some serotonin neurones also express neuronal nitric oxide synthase, which has been implicated in neurotoxicity, the present study was undertaken to determine whether nitric oxide synthase expressing serotonin neurones are selectively vulnerable to methylenedioxymethamphetamine or p-chloroamphetamine. Using double-labeling immunocytochemistry and double in situ hybridization for nitric oxide synthase and the serotonin transporter, it was confirmed that about two thirds of serotonergic cell bodies in the dorsal raphe nucleus expressed nitric oxide synthase, however few if any serotonin transporter immunoreactive axons in striatum expressed nitric oxide synthase at detectable levels. Methylenedioxymethamphetamine (30 mg/kg) or p-chloroamphetamine (2 x 10 mg/kg) was administered to Sprague-Dawley rats, and 7 days after drug administration there were modest decreases in the levels of serotonin transporter protein in frontal cortex, and striatum using Western blotting, even though axonal loss could be clearly seen by immunostaining. p-Chloroamphetamine or methylenedioxymethamphetamine administration did not alter the level of nitric oxide synthase in striatum or frontal cortex, determined by Western blotting. Analysis of serotonin neuronal cell bodies 7 days after p-chloroamphetamine treatment, revealed a net down-regulation of serotonin transporter mRNA levels, and a profound change in expression of nitric oxide synthase, with 33% of serotonin transporter mRNA positive cells containing nitric oxide synthase mRNA, compared with 65% in control animals. Altogether these results support the hypothesis that serotonin neurones which express nitric oxide synthase are most vulnerable to substituted amphetamine toxicity, supporting the concept that the selective vulnerability of serotonin neurones has a molecular basis.

Multicore-enabling the MPJ express messaging library

With the transition to multicore processors almost complete, the parallel processing community is seeking efficient ways to port legacy message passing applications on shared memory and multicore processors. MPJ Express is our reference implementation of Message Passing Interface (MPI)-like bindings for the Java language. Starting with the current release, the MPJ Express software can be configured in two modes: the multicore and the cluster mode. In the multicore mode, parallel Java applications execute on shared memory or multicore processors. In the cluster mode, Java applications parallelized using MPJ Express can be executed on distributed memory platforms like compute clusters and clouds. The multicore device has been implemented using Java threads in order to satisfy two main design goals of portability and performance. We also discuss the challenges of integrating the multicore device in the MPJ Express software. This turned out to be a challenging task because the parallel application executes in a single JVM in the multicore mode. On the contrary in the cluster mode, the parallel user application executes in multiple JVMs. Due to these inherent architectural differences between the two modes, the MPJ Express runtime is modified to ensure correct semantics of the parallel program. Towards the end, we compare performance of MPJ Express (multicore mode) with other C and Java message passing libraries---including mpiJava, MPJ/Ibis, MPICH2, MPJ Express (cluster mode)---on shared memory and multicore processors. We found out that MPJ Express performs signicantly better in the multicore mode than in the cluster mode. Not only this but the MPJ Express software also performs better in comparison to other Java messaging libraries including mpiJava and MPJ/Ibis when used in the multicore mode on shared memory or multicore processors. We also demonstrate effectiveness of the MPJ Express multicore device in Gadget-2, which is a massively parallel astrophysics N-body siimulation code.

Trouble on the Friendship Express?

The Maitreyi (Friendship) Express, the rail service between India and Bangladesh that was restarted recently evoked nostalgia and hopes for stronger ties between the two nations. However, it will take more than a rail link to deal with fears of infiltration by Bangladeshi Muslims that is being used in aggressive political rhetoric.