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Sample records for carlos municipio insular

  1. Prevalencia de maloclusiones en niños de la escuela Carlos Cuquejo del municipio Puerto Padre, Las Tunas

    OpenAIRE

    Haideé Tamara Díaz Méndez; Bernardo Ochoa Fernández; Lisett Paz Quiñones; Kenya Casanova Sales; Yudenia Coca García

    2015-01-01

    Fundamento: en el examen estomatológico correspondiente, realizado a los niños de primero a sexto grado de la escuela primaria Carlos Cuquejo, fue detectado un alto número de niños con maloclusiones de diferentes tipos. Objetivo: describir la prevalencia de las maloclusiones en escolares de 5 a 11 años de edad. Métodos: se realizó un estudio descriptivo, transversal, en el periodo comprendido desde septiembre 2011 a marzo 2012, con todos los escolares que presentaron maloclusión, pertenecient...

  2. Significados en torno a la reparación, la ayuda humanitaria, la indemnización y la restitución en víctimas del conflicto armado en el municipio de San Carlos

    Directory of Open Access Journals (Sweden)

    Juan David Villa Gómez

    2015-08-01

    Full Text Available Se presentan los primeros resultados de las indagaciones sobre la valoración que las mismas víctimas del conflicto armado, del municipio de San Carlos Antioquia (Colombia, hacen de la implementación de la Ley 1448 (Ley de Victimas; dicho proceso de investigación, en esta primera entrega, evidenció entre otros hallazgos, la contradicción entre el discurso oficial y el relato de las víctimas en relación a los procesos de reparación, discursos contradictorios respecto a la transición, el estado de vulneración e insatisfacción de necesidades básicas de las personas victimizadas así como una alta confusión en la implementación de la Ley. Estos resultados, entre otros, permiten afirmar que, la reparación hoy, dista mucho de ser un proceso que aporte a la reconstrucción del tejido social, a la paz y la reconciliación. The first results of the inquiries on the valuation made by the very victims of the armed conflict, in the municipality of San Carlos Antioquia (Colombia are shown in this paper, which are part of the implementation of the 1448 Law (Law of Victims; such a research process of, in this first installment, evidenced among other findings, the contradiction between the official discourse and the story of the victims in relation to the reparation processes, contradictory speeches regarding the transition, the state of infringement and dissatisfaction of victimized people’s basic needs, as well as a high confusion as for the implementation of the Law. These findings, among others, allow to affirm that reparation today, is far from being a process that contributes to the reconstruction of the social fabric, to peace, and reconciliation.

  3. Significados en torno a la indemnización y la restitución en víctimas del conflicto armado en el municipio de San Carlos

    Directory of Open Access Journals (Sweden)

    Villa Gómez, Juan David

    2016-02-01

    Full Text Available Resumen. Se resultados de las indagaciones sobre la valoración que las mismas víctimas del conflicto armado, del municipio de San Carlos Antioquia (Colombia, hacen de la implementación de la Ley 1448 (Ley de Victimas; dicho proceso de investigación, evidenció entre otros hallazgos, la contradicción entre el discurso oficial y el relato de las víctimas en relación a los procesos de reparación, discursos contradictorios respecto a la transición, el estado de vulneración e insatisfacción de necesidades básicas de las personas victimizadas así como una alta confusión en la implementación de la Ley. Estos resultados, entre otros, permiten afirmar que, la reparación hoy, dista mucho de ser un proceso que aporte a la reconstrucción del tejido social, a la paz y la reconciliación. Abstract. The results of the inquiries on the valuation that the very victims make of the armed conflict, in the Municipality of San Carlos, Antioquia, Colombia of the implementation of the 1448 Law (Law of victims; such a process of research, made evident among other findings, the contradiction between the official discourse and the story of the victims in relation to the processes of repair, contradictory speeches regarding the transition, the state of infringement and dissatisfaction of victimized people’s basic needs, as well as a high confusion in the implementation of the Law. These findings, among others, allow to affirm that, repair today, is very far from being a process that contributes to the reconstruction of the social fabric, to peace, and reconciliation.

  4. Healthy Municipios in Latin America.

    Science.gov (United States)

    Restrepo, H E; Llanos, G; Contreras, A; Rocabado, F; Gross, S; Suárez, J; González, J

    1995-09-01

    This article describes the Healthy Municipios movement in Latin America and gives examples of some PAHO projects that could become demonstration projects. The Healthy Municipios movement was established in the early 1990s. The movement aims to promote healthy municipalities according to objectives set forth in the 1987 Ottawa Charter on Health Promotion, the 1992 Declaration of Bogota, and the 1993 Caribbean Health Promotion Charter. The movement is a joint effort of government, the health sector, and the community in promoting health locally. Key features of the movement are its creativity, variety, political strength, and adaptation to local conditions. Technical cooperation serves the purpose of facilitating information exchange and promotes the use of modern techniques of analysis and scientific and technical information. All projects shared the following common features: initiation by the local community with strong political commitment, intersectoral organizational structure, widespread community mobilization and participation, problem solving activities, and a recognizable leader. Pioneering projects include the Comprehensive Project for Cienfuegos, Cuba; the Health Manizales, Colombia; the Network in Mexico; Baruta and El Hatillo, Venezuela; Valdivia, Chile; and San Carlos Canton, Costa Rica. It is concluded that these projects and most others aim to assure equity. These efforts are important for placing health on the political agenda and implementing healthy policies. The Valdivia project, for example, serves a population of about 120,000 in the urban city of Valdivia, the semi-urban area, and rural areas. The project was officially sanctioned by the President of Chile on World Health Day in 1993. Progress was reported in mass communication and school-based programs. Attention was directed also to prevention of risk factors for noncommunicable diseases and to the problem of traffic accidents.

  5. Insular volume reduction in schizophrenia.

    Science.gov (United States)

    Saze, Teruyasu; Hirao, Kazuyuki; Namiki, Chihiro; Fukuyama, Hidenao; Hayashi, Takuji; Murai, Toshiya

    2007-12-01

    Structural and functional abnormalities of the insular cortex have been reported in patients with schizophrenia. Most studies have shown that the insular volumes in schizophrenia patients are smaller than those of healthy people. As the insular cortex is functio-anatomically divided into anterior and posterior subdivisons, recent research is focused on uncovering a specific subdivisional abnormality of the insula in patients with schizophrenia. A recent ROI-based volumetric MRI study demonstrated specific left anterior insular volume reduction in chronic schizophrenia patients (Makris N, Goldstein J, Kennedy D, Hodge S, Caviness V, Faraone S, Tsuang M, Seidman L (2006) Decreased volume of left and total anterior insular lobule in schizophrenia. Schizophr Res 83:155-171). On the other hand, our VBM-based volumetric study revealed a reduction in right posterior insular volume (Yamada M, Hirao K, Namiki C, Hanakawa T, Fukuyama H, Hayashi T, Murai T (2007) Social cognition and frontal lobe pathology in schizophrenia: a voxel-based morphometric study. NeuroImage 35:292-298). In order to address these controversial results, ROI-based subdivisional volumetry was performed using the MRI images from the same population we analyzed in our previous VBM-study. The sample group comprised 20 schizophrenia patients and 20 matched healthy controls. Patients with schizophrenia showed a global reduction in insular gray matter volumes relative to healthy comparison subjects. In a simple comparison of the volumes of each subdivision between the groups, a statistically significant volume reduction in patients with schizophrenia was demonstrated only in the right posterior insula. This study suggests that insular abnormalities in schizophrenia would include anterior as well as posterior parts. Each subdivisional abnormality may impact on different aspects of the pathophysiology and psychopathology of schizophrenia; these relationships should be the focus of future research.

  6. Food related processes in the insular cortex

    OpenAIRE

    Frank, Sabine; Kullmann, Stephanie; Veit, Ralf

    2013-01-01

    The insular cortex is a multimodal brain region with regional cytoarchitectonic differences indicating various functional specializations. As a multisensory neural node, the insular cortex integrates perception, emotion, interoceptive awareness, cognition, and gustation. Regarding the latter, predominantly the anterior part of the insular cortex is regarded as the primary taste cortex. In this review, we will specifically focus on the involvement of the insula in food processing and on multim...

  7. Food related processes in the insular cortex

    OpenAIRE

    Sabine eFrank; Stephanie eKullmann; Ralf eVeit

    2013-01-01

    The insular cortex is a multimodal brain region with regional cytoarchitectonic differences indicating various functional specializations. As a multisensory neural node, the insular cortex integrates perception, emotion, interoceptive awareness, cognition, and gustation. Regarding the latter, predominantly the anterior part of the insular cortex is regarded as the primary taste cortex.In this review, we will specifically focus on the involvement of the insula in food processing and on multimo...

  8. Food related processes in the insular cortex

    Directory of Open Access Journals (Sweden)

    Sabine eFrank

    2013-08-01

    Full Text Available The insular cortex is a multimodal brain region with regional cytoarchitectonic differences indicating various functional specializations. As a multisensory neural node, the insular cortex integrates perception, emotion, interoceptive awareness, cognition, and gustation. Regarding the latter, predominantly the anterior part of the insular cortex is regarded as the primary taste cortex.In this review, we will specifically focus on the involvement of the insula in food processing and on multimodal integration of food-related items. Influencing factors of insular activation elicited by various foods range from calorie-content to the internal physiologic state, body mass index or eating behavior. Sensory perception of food-related stimuli including seeing, smelling, and tasting elicits increased activation in the anterior and mid-dorsal part of the insular cortex. Apart from the pure sensory gustatory processing, there is also a strong association with the rewarding/hedonic aspects of food items, which is reflected in higher insular activity and stronger connections to other reward-related areas. Interestingly, the processing of food items has been found to elicit different insular activation in lean compared to obese subjects and in patients suffering from an eating disorder (anorexia nervosa, bulimia nervosa. The knowledge of functional differences in the insular cortex opens up the opportunity for possible noninvasive treatment approaches for obesity and eating disorders. To target brain functions directly, real-time functional magnetic resonance imaging neurofeedback offers a state-of-the-art tool to learn to control the anterior insular cortex activity voluntarily. First evidence indicates that obese adults have an enhanced ability to regulate the anterior insular cortex.

  9. 24 CFR 570.441 - Citizen participation-insular areas.

    Science.gov (United States)

    2010-04-01

    ... 24 Housing and Urban Development 3 2010-04-01 2010-04-01 false Citizen participation-insular areas...-Entitlement CDBG Grants in Hawaii and Insular Areas Programs § 570.441 Citizen participation—insular areas. (a) General. An insular area jurisdiction submitting an abbreviated consolidated plan under 24 CFR...

  10. municipios Maracaibo y San Francisco

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    Rosa E. Ortiz

    2005-01-01

    Full Text Available El estudio de las Organizaciones No Gubernamentales estuvo dirigido a caracterizar la diversidad de grupos y asociaciones que bajo el termino genérico de ONG’s existen en los municipios Maracaibo y San Francisco, los más poblados y relevantes en la vida política, económica, social y cultural del estado Zulia-Venezuela. Se planteó una investigación exploratoria y descriptiva. El resultado permitió reconocer a Existe un crecimiento sostenido de las ONG en estos municipios: b los sectores con mayor concentración son el de salud; educación; deporte y recreación; arte y cultura. c Las instituciones que promueven más organizaciones son la iglesia y el Estado, lo que supone es este último caso una reducción de las funciones que le corresponden, además de la minimización de costos y conflictos laborales. d Ambivalencia en la orientación de su funcionamiento: Algunas ONG’s implementan prácticas próximas a la mercantilización de los servicios con lo cual legitiman estrategias del modelo económico neoliberal mientras otras contribuyen a fortalecer la democratización de los servicios públicos. Se concluye que el crecimiento y características de las ONGs en estos municipios estuvo vinculado en los noventa y comienzos de la década de 2000 por la aplicación de las políticas públicas neoliberales.

  11. Insular species swarm goes underground

    DEFF Research Database (Denmark)

    P. S. Reboleira, Ana Sofia; Enghoff, Henrik

    2014-01-01

    Two new species of the genus Cylindroiulus Verhoeff, 1894, C. julesvernei and C. oromii, are described from the subterranean ecosystem of Madeira Island, Portugal. Species are illustrated with photographs and diagrammatic drawings. The new species belong to the Cylindroiulus madeirae-group, an in......Two new species of the genus Cylindroiulus Verhoeff, 1894, C. julesvernei and C. oromii, are described from the subterranean ecosystem of Madeira Island, Portugal. Species are illustrated with photographs and diagrammatic drawings. The new species belong to the Cylindroiulus madeirae......-group, an insular species swarm distributed in the archipelagos of Madeira and the Canary Islands. We discuss the differences between the new species and their relatives and present information on the subterranean environment of Madeira. An updated overview of the subterranean biodiversity of millipedes...

  12. The insular cortex: a comparative perspective.

    Science.gov (United States)

    Butti, Camilla; Hof, Patrick R

    2010-06-01

    The human insular cortex is involved in a variety of viscerosensory, visceromotor, and interoceptive functions, and plays a role in complex processes such as emotions, music, and language. Across mammals, the insula has considerable morphologic variability. We review the structure and connectivity of the insula in laboratory animals (mouse, domestic cat, macaque monkey), and we present original data on the morphology and cytoarchitecture of insular cortex in less common species including a large carnivore (the Atlantic walrus, Odobenus rosmarus), two artiodactyls (the pigmy hippopotamus, Hexaprotodon liberiensis, and the Western bongo, Tragelaphus eurycerus), two cetaceans (the beluga whale, Delphinapterus leucas, and the minke whale, Balaenoptera acutorostrata), and a sirenian (the Florida manatee, Trichechus manatus latirostris). The insula shows substantial variability in shape, extent, and gyral and sulcal patterns, as well as differences in laminar organization, cellular specialization, and structural association with the claustrum. Our observations reveal that the insular cortex is extremely variable among mammals. These differences could be related to the role exerted by specific and selective pressures on cortical structure during evolution. We conclude that it is not possible to identify a general model of organization for the mammalian insular cortex. PMID:20512368

  13. Biblioteca pública y municipio

    OpenAIRE

    Merlo Vega, José Antonio; Omella i Claparols, Ester

    2004-01-01

    Se realiza un estudio sobre la vinculación de los municipios con la biblioteca pública en el entorno de la realidad española. The article presents a study about the Public Library in the boroughs in Spain.

  14. Eusocial Apidae in tropical insular region

    OpenAIRE

    Maria Cristina Affonso Lorenzon; Marilena de Menezes Silva Conde; Celso Guimarães Barbosa

    2006-01-01

    This study examined species richness and relative abundance of eusocial Apidae in an insular region of rain-forest, southeastern Brazil. Sampling took place during one year, using an standardized method with entomological net, at sites of secondary growth habitats surrounded by Atlantic rain-forest. Thirteen species of eusocial Apidae were netted at flowers, over 80% of the captured individuals were meliponine species, although the presence of Apis mellifera, commonly dominant in Brazilian ha...

  15. Attenuated sensitivity to the emotions of others by insular lesion

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    Yuri eTerasawa

    2015-09-01

    Full Text Available The insular cortex has been considered to be the neural base of visceral sensation for many years. Previous studies in psychology and cognitive neuroscience have accumulated evidence indicating that interoception is an essential factor in the subjective feeling of emotion. Recent neuroimaging studies have demonstrated that anterior insular cortex activation is associated with accessing interoceptive information and underpinning the subjective experience of emotional state.Only a small number of studies have focused on the influence of insular damage on emotion processing and interoceptive awareness. Moreover, disparate hypotheses have been proposed for the alteration of emotion processing by insular lesions. Some studies show that insular lesions yield an inability for understanding and representing disgust exclusively, but other studies suggest that such lesions modulate arousal and valence judgments for both positive and negative emotions.In this study, we examined the alteration in emotion recognition in three right insular and adjacent area damaged cases with well-preserved higher cognitive function. Participants performed an experimental task using morphed photos that ranged between neutral and emotional facial expressions (i.e., anger, sadness, disgust, and happiness. Recognition rates of particular emotions were calculated to measure emotional sensitivity. In addition, they performed heartbeat perception task for measuring interoceptive accuracy. The cases identified emotions that have high arousal level (e.g., anger as less aroused emotions (e.g., sadness and a case showed remarkably low interoceptive accuracy. The current results show that insular lesions lead to attenuated emotional sensitivity across emotions, rather than category-specific impairments such as to disgust. Despite the small number of cases, our findings suggest that the insular cortex modulates recognition of emotional saliency and mediates interoceptive and emotional

  16. Attenuated sensitivity to the emotions of others by insular lesion.

    Science.gov (United States)

    Terasawa, Yuri; Kurosaki, Yoshiko; Ibata, Yukio; Moriguchi, Yoshiya; Umeda, Satoshi

    2015-01-01

    The insular cortex has been considered to be the neural base of visceral sensation for many years. Previous studies in psychology and cognitive neuroscience have accumulated evidence indicating that interoception is an essential factor in the subjective feeling of emotion. Recent neuroimaging studies have demonstrated that anterior insular cortex activation is associated with accessing interoceptive information and underpinning the subjective experience of emotional state. Only a small number of studies have focused on the influence of insular damage on emotion processing and interoceptive awareness. Moreover, disparate hypotheses have been proposed for the alteration of emotion processing by insular lesions. Some studies show that insular lesions yield an inability for understanding and representing disgust exclusively, but other studies suggest that such lesions modulate arousal and valence judgments for both positive and negative emotions. In this study, we examined the alteration in emotion recognition in three right insular and adjacent area damaged cases with well-preserved higher cognitive function. Participants performed an experimental task using morphed photos that ranged between neutral and emotional facial expressions (i.e., anger, sadness, disgust, and happiness). Recognition rates of particular emotions were calculated to measure emotional sensitivity. In addition, they performed heartbeat perception task for measuring interoceptive accuracy. The cases identified emotions that have high arousal level (e.g., anger) as less aroused emotions (e.g., sadness) and a case showed remarkably low interoceptive accuracy. The current results show that insular lesions lead to attenuated emotional sensitivity across emotions, rather than category-specific impairments such as to disgust. Despite the small number of cases, our findings suggest that the insular cortex modulates recognition of emotional saliency and mediates interoceptive and emotional awareness. PMID

  17. Solar Forecasting in a Challenging Insular Context

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    Philippe Lauret

    2016-01-01

    Full Text Available This paper aims at assessing the accuracy of different solar forecasting methods in the case of an insular context. Two sites of La Réunion Island, Le Tampon and Saint-Pierre, are chosen to do the benchmarking exercise. Réunion Island is a tropical island with a complex orography where cloud processes are mainly governed by local dynamics. As a consequence, Réunion Island exhibits numerous micro-climates. The two aforementioned sites are quite representative of the challenging character of solar forecasting in the case of a tropical island with complex orography. Hence, although distant from only 10 km, these two sites exhibit very different sky conditions. This work focuses on day-ahead and intra-day solar forecasting. Day-ahead solar forecasts are provided by the European Center for Medium-Range Weather Forecast (ECMWF. This organization maintains and runs the Numerical Weather Prediction (NWP model named Integrated Forecast System (IFS. In this work, post-processing techniques are applied to refine the output of the IFS model for day-ahead forecasting. Statistical models like a recursive linear model or a nonlinear model such as an artificial neural network are used to produce the intra-day solar forecasts. It is shown that a combination of the IFS model and the neural network model further improves the accuracy of the forecasts.

  18. Report to Congress on Insular Area energy vulnerability

    Energy Technology Data Exchange (ETDEWEB)

    1994-05-01

    This report was prepared in response to Section 1406 of the Energy Policy Act of 1992 (Public Law 102-486), which directed the Department of Energy (DOE) to ``conduct a study of the implications of the unique vulnerabilities of the insular areas to an oil supply disruption,`` and to ``outline how the insular areas shall gain access to vital oil supplies during times of national emergency.`` The Act defines the insular areas to be the US Virgin Islands and Puerto Rico in the Caribbean, and Guam, American Samoa, the Commonwealth of the Northern Mariana Islands (CNMI), and Palau in the Pacific. In the study, ``unique vulnerabilities`` were defined as susceptibility to: (1) more frequent or more likely interruptions of oil supplies compared to the US Mainland, and/or (2) disproportionately larger or more likely economic losses in the event of an oil supply disruption. In order to assess unique vulnerabilities, the study examined the insular areas` experience during past global disruptions of oil supplies and during local emergencies caused by natural disasters. The effects of several possible future global disruptions and local emergencies were also analyzed. Analyses were based on historical data, simulations using energy and economic models, and interviews with officials in the insular governments and the energy industry.

  19. Localization of abnormal discharges causing insular epilepsy by magnetoencephalography.

    Science.gov (United States)

    Park, Hyeon-Mi; Nakasato, Nobukazu; Tominaga, Teiji

    2012-01-01

    The insula, one of the five cerebral lobes of the brain, is located deep within the brain and lies mainly beneath the temporal lobe. Insular epilepsy can be easily confused and misdiagnosed as temporal lobe epilepsy (TLE) because of the similar clinical symptoms and scalp electroencephalography (EEG) findings due to the insula location and neuronal connections with the temporal lobe. Magnetoencephalography (MEG) has higher sensitivity and spatial resolution than scalp EEG, and thus can often identify epileptic discharges not revealed by scalp EEG. Simultaneous scalp EEG and MEG were performed to detect and localize epileptic discharges in two patients known to have insular epilepsy associated with cavernous angioma in the insula. Epileptic discharges were detected as abnormal spikes in the EEG and MEG findings. In Patient 1, the sources of all MEG spikes detected simultaneously by EEG and MEG (E/M-spikes) were localized in the anterior temporal lobe, similar to TLE. In contrast, the sources of all MEG spikes detected only by MEG (M-spikes) were adjacent to the insular lesion. In Patient 2, the sources of all MEG spikes detected simultaneously by EEG and MEG (E/M-spikes) were localized in the anterior temporal lobe. These findings indicate that MEG allows us to detect insular activity that is undetectable by scalp EEG. In conclusion, simultaneous EEG and MEG are helpful for detecting spikes and obtaining additional information about the epileptic origin and propagation in patients with insular epilepsy. PMID:22353789

  20. Turismo em meio insular africano: potencialidades, constrangimentos e impactos

    OpenAIRE

    Brito, Brígida Rocha; Pinto, Joaquim Ramos; Alarcão, Nuno; Duarte, Andreia; Loloum, Bastien

    2010-01-01

    “Turismo em Meio Insular Africano. Potencialidades, constrangimentos e impactos” é o resultado de um Projecto de Investigação financiado pela Fundação para a Ciência e a Tecnologia (FCT), intitutlado “O impacto do Turismo no Desenvolvimento Comunitário em África: análise de experiências insulares”, que consistiu num estudo comparativo entre dois Pequenos Estados Insulares em Desenvolvimento, Cabo Verde e São Tomé e Príncipe, sendo analisados os efeitos do turismo no desenvolvimento das popula...

  1. Ideas on the Margins: Professional Counseling and Ideological Insularity

    Science.gov (United States)

    Hansen, James

    2010-01-01

    Efforts to professionalize counseling practice have yielded extraordinary benefits to counselors. However, professionalization has also caused counselors to adopt strict definitions of their education, practices, and ethics. In order to combat the ideological insularity brought on by professionalization, several marginalized ideas are considered.…

  2. Are the insular cortex and cortisol implicated in Parkinsonian features?

    NARCIS (Netherlands)

    Tops, Mattie

    2006-01-01

    Recent studies implicate insular cortex and the hormone cortisol in Parkinsonian features. Dopaminergic alterations at the level of the insula may be involved in changes in personality (i.e. novelty seeking) and symptoms of hemispatial neglect. I discuss this evidence and suggest that attention in f

  3. Second Surgery in Insular Low-Grade Gliomas

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    Tamara Ius

    2015-01-01

    Full Text Available Background. Given the technical difficulties, a limited number of works have been published on insular gliomas surgery and risk factors for tumor recurrence (TR are poorly documented. Objective. The aim of the study was to determine TR in adult patients with initial diagnosis of insular Low-Grade Gliomas (LGGs that subsequently underwent second surgery. Methods. A consecutive series of 53 patients with insular LGGs was retrospectively reviewed; 23 patients had two operations for TR. Results. At the time of second surgery, almost half of the patients had experienced progression into high-grade gliomas (HGGs. Univariate analysis showed that TR is influenced by the following: extent of resection (EOR (P<0.002, ΔVT2T1 value (P<0.001, histological diagnosis of oligodendroglioma (P=0.017, and mutation of IDH1 (P=0.022. The multivariate analysis showed that EOR at first surgery was the independent predictor for TR (P<0.001. Conclusions. In patients with insular LGG the EOR at first surgery represents the major predictive factor for TR. At time of TR, more than 50% of cases had progressed in HGG, raising the question of the oncological management after the first surgery.

  4. Desarrollo convergente y municipios pobres en Nayarit, 1989-2004

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    Antonio R. Márquez González

    2010-01-01

    Full Text Available En el marco de los efectos de la globalización económica, se analiza el comportamiento del producto interno bruto per cápita entre los 20 municipios del estado de Nayarit, para el periodo 1989-2004. La información se organizó en corte trasversal para tres fechas en el tiempo. De los resultados obtenidos del modelo de regresión no lineal, se infiere que la divergencia entre los municipios tiende a ampliarse; los más pobres se agruparon en un club, y se observa que también presentan niveles bajos de bienestar social.

  5. Body size evolution in insular speckled rattlesnakes (Viperidae: Crotalus mitchellii.

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    Jesse M Meik

    Full Text Available BACKGROUND: Speckled rattlesnakes (Crotalus mitchellii inhabit multiple islands off the coast of Baja California, Mexico. Two of the 14 known insular populations have been recognized as subspecies based primarily on body size divergence from putative mainland ancestral populations; however, a survey of body size variation from other islands occupied by these snakes has not been previously reported. We examined body size variation between island and mainland speckled rattlesnakes, and the relationship between body size and various island physical variables among 12 island populations. We also examined relative head size among giant, dwarfed, and mainland speckled rattlesnakes to determine whether allometric differences conformed to predictions of gape size (and indirectly body size evolving in response to shifts in prey size. METHODOLOGY/PRINCIPAL FINDINGS: Insular speckled rattlesnakes show considerable variation in body size when compared to mainland source subspecies. In addition to previously known instances of gigantism on Angel de la Guarda and dwarfism on El Muerto, various degrees of body size decrease have occurred frequently in this taxon, with dwarfed rattlesnakes occurring mostly on small, recently isolated, land-bridge islands. Regression models using the Akaike information criterion (AIC showed that mean SVL of insular populations was most strongly correlated with island area, suggesting the influence of selection for different body size optima for islands of different size. Allometric differences in head size of giant and dwarf rattlesnakes revealed patterns consistent with shifts to larger and smaller prey, respectively. CONCLUSIONS/SIGNIFICANCE: Our data provide the first example of a clear relationship between body size and island area in a squamate reptile species; among vertebrates this pattern has been previously documented in few insular mammals. This finding suggests that selection for body size is influenced by changes in

  6. Insular Dysfunction in People at Risk for Psychotic Disorders

    Directory of Open Access Journals (Sweden)

    Gianna Sepede

    2015-06-01

    Full Text Available In response to the review article written by Pavuluri and May [1] and to the original article by Tomasino et al [2] we will comment the recent neuroimaging findings of insular dysfunctions in Schizophrenia and Bipolar Disorders, focusing on people at genetic risk for developing psychotic symptoms. A disrupted insular functioning was reported in several studies, even though the results were not univocal with respect to the direction of the effect (some studies reported a reduced activation, other an augmented activation and the lateralization of the observed alterations (left, right or bilateral. We will conclude that an altered function of the insula during both cognitive and emotional task may be a candidate vulnerability marker for psychotic disorders.

  7. Activation of the insular cortex during dynamic exercise in humans

    DEFF Research Database (Denmark)

    Williamson, James; Nobrega, A C; McColl, R;

    1997-01-01

    role as a site for regulation of autonomic activity. 2. Eight subjects were studied during voluntary active cycling and passively induced cycling. Additionally, four of the subjects underwent passive movement combined with electrical stimulation of the legs. 3. Increases in regional cerebral blood flow...... during active, but not passive cycling. There were no significant changes in rCBF for the right insula. Also, the magnitude of rCBF increase for leg primary motor areas was significantly greater for both active cycling and passive cycling combined with electrical stimulation compared with passive cycling...... alone. 5. These findings provide the first evidence of insular activation during dynamic exercise in humans, suggesting that the left insular cortex may serve as a site for cortical regulation of cardiac autonomic (parasympathetic) activity. Additionally, findings during passive cycling with electrical...

  8. The insular taste cortex contributes to odor quality coding

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    Maria G Veldhuizen

    2010-07-01

    Full Text Available Despite distinct peripheral and central pathways, stimulation of both the olfactory and the gustatory systems may give rise to the sensation of sweetness. Whether there is a common central mechanism producing sweet quality sensations or two discrete mechanisms associated independently with gustatory and olfactory stimuli is currently unknown. Here we used fMRI to determine whether odor sweetness is represented in the piriform olfactory cortex, which is thought to code odor quality, or in the insular taste cortex, which is thought to code taste quality. Fifteen participants sampled two concentrations of a pure sweet taste (sucrose, two sweet food odors (chocolate and strawberry, and two sweet floral odors (lilac and rose. Replicating prior work we found that olfactory stimulation activated the piriform, orbitofrontal and insular cortices. Of these regions, only the insula also responded to sweet taste. More importantly, the magnitude of the response to the food odors, but not to the non-food odors, in this region of insula was positively correlated with odor sweetness rating. These findings demonstrate that insular taste cortex contributes to odor quality coding by representing the taste-like aspects of food odors. Since the effect was specific to the food odors, and only food odors are experienced with taste, we suggest this common central mechanism develops as a function of experiencing flavors.

  9. Insular Volume Reduction in Patients with Social Anxiety Disorder

    Science.gov (United States)

    Kawaguchi, Akiko; Nemoto, Kiyotaka; Nakaaki, Shutaro; Kawaguchi, Takatsune; Kan, Hirohito; Arai, Nobuyuki; Shiraishi, Nao; Hashimoto, Nobuhiko; Akechi, Tatsuo

    2016-01-01

    Despite the fact that social anxiety disorder (SAD) is highly prevalent, there have been only a few structural imaging studies. Moreover, most of them reported about a volume reduction in amygdale, which plays a key role in the neural function of SAD. Insula is another region of interest. Its hyperactivity in regard to processing negative emotional information or interoceptive awareness has been detected in patients with SAD. Referring to these studies, we hypothesized that insular volumes might reduce in patients with SAD and made a comparison of insular volumes between 13 patients with SAD and 18 healthy controls with matched age and gender using voxel-based morphometry. As a result, we found a significant volume reduction in insula in the SAD group. Our results suggest that the patients with SAD might have an insular volume reduction apart from amygdala. Since insula plays a critical role in the pathology of SAD, more attention should be paid not only to functional study but also morphometrical study of insula. PMID:26834652

  10. Insular epilepsy: similarities to temporal lobe epilepsy case report Epilepsia insular: similaridades à epilepsia do lobo temporal - relato de caso

    Directory of Open Access Journals (Sweden)

    ARTHUR CUKIERT

    1998-03-01

    Full Text Available Insular epilepsy has been rarely reported and its clinical and electrographic features are poorly understood. The electrographic study of the insula is difficult since it is hidden from the brain surface by the frontal and temporal lobe. A 48 years-old woman started having simple partial autonomic and complex partial seizures with automatisms and ictal left arm paresis 8 years prior to admission. Seizure's frequency was 1 per week. Pre-operative EEG showed a right temporal lobe focus. Neuropsychological testing disclosed right fronto-temporal dysfunction. MRI showed a right anterior insular cavernous angioma. Intraoperative ECoG obtained after spliting of the sylvian fissure showed independent spiking from the insula and temporal lobe and insular spikes that spread to the temporal lobe. The cavernous angioma and the surrounding gliotic tissue were removed and the temporal lobe was left in place. Post-resection ECoG still disclosed independent temporal and insular spiking with a lower frequency. The patient has been seizure-free since surgery. Insular epilepsy may share many clinical and electroencephalographic features with temporal lobe epilepsy.A epilepsia insular tem sido raramente relatada e suas características clínicas e eletrencefalográficas são pobremente conhecidas. O estudo eletrográfico da ínsula é difícil já que ela se encontra recoberta pelos lobos frontal e temporal. Uma paciente, de 48 anos, começou a ter crises parciais simples autonômicas e crises parciais complexas com automatismos e paresia crítica de membro superior esquerdo 8 anos antes desta internação. A frequência de crises era de 1/semana . O EEG pré-operatório mostrou foco temporal direito. Testagem neuropsicológica demonstrou disfunção fronto-temporal direita. RMN demonstrou cavernoma insular anterior direito. A eletrocorticografia intraoperatória obtida após a abertura da fissura sylviana demonstrou a presença de espículas independentes na

  11. Calidad del servicio de internet en el municipio Maracaibo

    OpenAIRE

    María Cristina Useche

    2008-01-01

    El objetivo central del trabajo es determinar la calidad de servicio que ofrecen las operadoras habilitadas en el sector de telecomunicaciones en Venezuela para prestar el servicio de Internet en el municipio Maracaibo. El mismo se basó en un tipo de investigación descriptivo- transaccional, abordando el objeto de estudio desde las perspectivas de Zeithaml y Bitner (2002), Pride y Ferrel (1997), Lovelock (1997), Cobra (2000) y Parasuraman, Zeithaml y Berry (2002). Se aplicó el muestreo aleato...

  12. Municipio Mariño Estado Nueva Esparta

    Directory of Open Access Journals (Sweden)

    María Medina

    2008-01-01

    Full Text Available Se caracteriza la gastronomía típica margariteña como atractivo turístico del Municipio Mariño, sus componentes: restaurantes, autores, platos y promoción. Para formular recomendaciones que permitan su aprovechamiento. Los fundamentos teóricos se basan en el área turismo y gastronomía, y su importancia para la actividad. La metodología es descriptiva y su diseño es de campo. Como conclusión se tiene que la situación actual de la gastronomía típica margariteña como atractivo turístico del municipio se caracteriza por la falta de información y promoción, la cual no se está aprovechando como atractivo turístico debido a la falta de conocimiento sobre la gastronomía típica margariteña y donde además en los restaurantes del municipio se están modificando las recetas originales.

  13. Cardioembolism and Involvement of the Insular Cortex in Patients with Ischemic Stroke.

    Directory of Open Access Journals (Sweden)

    Jihoon Kang

    Full Text Available To evaluate whether topographical characteristics of insular involvement in ischemic stroke are associated with cardioembolism.A consecutive series of patients hospitalized for ischemic stroke within 7 days of symptom onset were identified. Based on diffusion-weighted imaging, we included those who had ischemic lesions in the middle cerebral artery (MCA territory. Each patient was assigned to one of two groups based on the presence or absence of insular involvement. The primary outcome was the frequency of cardioembolism, which was compared based on insular involvement. Of 1,311 patients with ischemic stroke in the MCA territory, 112 had insular involvement (8.5%. The frequency of cardioembolism in patients with insular involvement (52.7% was significantly higher than that in patients without insular involvement (30.4%, P < 0.001. Although insular involvement was associated with a severe baseline National Institutes of Health Stroke Scale score (13 vs. 4, it did not independently affect the 3-month functional outcome.In cases of stroke in the MCA territory, involvement of the insular cortex may be associated with a risk of cardioembolism.

  14. Isolated left posterior insular infarction and convergent roles in verbal fluency, language, memory, and executive function

    OpenAIRE

    Julayanont, Parunyou; Ruthirago, Doungporn; DeToledo, John C.

    2016-01-01

    The posterior insular cortex—a complex structure interconnecting various brain regions for different functions—is a rare location for ischemic stroke. We report a patient with isolated left posterior insular infarction who presented with multiple cognitive impairment, including impairment in semantic and phonemic verbal fluency.

  15. Phylogeny and adaptation shape the teeth of insular mice.

    Science.gov (United States)

    Ledevin, Ronan; Chevret, Pascale; Ganem, Guila; Britton-Davidian, Janice; Hardouin, Emilie A; Chapuis, Jean-Louis; Pisanu, Benoit; da Luz Mathias, Maria; Schlager, Stefan; Auffray, Jean-Christophe; Renaud, Sabrina

    2016-02-10

    By accompanying human travels since prehistorical times, the house mouse dispersed widely throughout the world, and colonized many islands. The origin of the travellers determined the phylogenetic source of the insular mice, which encountered diverse ecological and environmental conditions on the various islands. Insular mice are thus an exceptional model to disentangle the relative role of phylogeny, ecology and climate in evolution. Molar shape is known to vary according to phylogeny and to respond to adaptation. Using for the first time a three-dimensional geometric morphometric approach, compared with a classical two-dimensional quantification, the relative effects of size variation, phylogeny, climate and ecology were investigated on molar shape diversity across a variety of islands. Phylogeny emerged as the factor of prime importance in shaping the molar. Changes in competition level, mostly driven by the presence or absence of the wood mouse on the different islands, appeared as the second most important effect. Climate and size differences accounted for slight shape variation. This evidences a balanced role of random differentiation related to history of colonization, and of adaptation possibly related to resource exploitation.

  16. Phylogeny and adaptation shape the teeth of insular mice.

    Science.gov (United States)

    Ledevin, Ronan; Chevret, Pascale; Ganem, Guila; Britton-Davidian, Janice; Hardouin, Emilie A; Chapuis, Jean-Louis; Pisanu, Benoit; da Luz Mathias, Maria; Schlager, Stefan; Auffray, Jean-Christophe; Renaud, Sabrina

    2016-02-10

    By accompanying human travels since prehistorical times, the house mouse dispersed widely throughout the world, and colonized many islands. The origin of the travellers determined the phylogenetic source of the insular mice, which encountered diverse ecological and environmental conditions on the various islands. Insular mice are thus an exceptional model to disentangle the relative role of phylogeny, ecology and climate in evolution. Molar shape is known to vary according to phylogeny and to respond to adaptation. Using for the first time a three-dimensional geometric morphometric approach, compared with a classical two-dimensional quantification, the relative effects of size variation, phylogeny, climate and ecology were investigated on molar shape diversity across a variety of islands. Phylogeny emerged as the factor of prime importance in shaping the molar. Changes in competition level, mostly driven by the presence or absence of the wood mouse on the different islands, appeared as the second most important effect. Climate and size differences accounted for slight shape variation. This evidences a balanced role of random differentiation related to history of colonization, and of adaptation possibly related to resource exploitation. PMID:26842576

  17. Calidad del servicio de taxis del municipio Maracaibo

    Directory of Open Access Journals (Sweden)

    Joheni A. Urdaneta G.

    2011-05-01

    Full Text Available El presente trabajo tiene como objetivo describir la calidad del servicio de los taxis en el municipio Maracaibo, ya que los mismos forman parte del sistema de transporte urbano de la ciudad, y es un servicio público fundamental para la convivencia de la sociedad; para lograr este objetivo se realizó una adaptación del modelo SERVPERF, diseñando un instrumento tipo cuestionario, con 32 ítems en 6 dimensiones, adecuado a las características propias del servicio de taxi, con la finalidad de confirmar que los ítems de los instrumentos se correspondían con las dimensiones adaptadas se aplicó la técnica de análisis factorial resultando un nuevo instrumento con 24 ítems en 3 dimensiones. Se utilizó la escala de Likert con tres (3 alternativas de respuesta. La investigación es de tipo descriptiva y aplicada, bajo diseño no experimental de tipo transeccional descriptiva y de campo. La población quedó conformada por los usuarios de las líneas de taxis del municipio Maracaibo. Se aplicó muestreo aleatorio por conglomerado. La confiabilidad del instrumento se midió a través del coeficiente alfa de Cronbach resultando de 0,82 lo cual se considera aceptable. Los resultados revelan que la calidad del servicio de taxis del municipio Maracaibo es mediana por lo tanto este servicio es susceptible a mejoras, las cuales son necesarias para elevar la calidad de vida de los marabinos. Este resultado se obtuvo con el instrumento originalmente adaptado de 32 ítems y con el cuestionario resultante del análisis factorial, de 24 ítems; esto confirma lo apropiado de esta técnica, ya que se redujo el número de ítems y de las dimensiones originalmente adaptadas y no se encontraron diferencias significativas en los resultados con ambos instrumentos; de esta manera se puede medir la calidad del servicio de taxis en el municipio Maracaibo a través de las dimensiones: confiabilidad del servicio, socialización y responsabilidad.

  18. GLOBAL AND INSULAR DIMENSIONS: SPACE IN SARDINIA BLUES

    Directory of Open Access Journals (Sweden)

    Ana Maria Chiarini

    2010-11-01

    Full Text Available The aim of this work is to focus attention on the dimension of space in Sardinia Blues (Publisher Bompiani, 2008, by Flavio Soriga. This is justified by the centrality of space throughout the novel and by the title itself. The island of Sardinia is not just a mere setting, but it is most importantly the articulating and conducting thread for all the themes related to the characters’ self-identity and existential issues. The regional Sardinian space, perceived as stereotyped and folkloristic, and the global space, seen as a source of both desire and fear, are problematized by the three young self-proclaimed “pirates of the island” in their long hours of idleness. It is our intention to highlight the conflicts of this marginal insular condition, heavily contaminated by an inevitable process of change, in Soriga’s simultaneously innovative and nostalgic fragmented text, filled with songs’ extracts and languages hybrids.

  19. Calidad del servicio de internet en el municipio Maracaibo

    Directory of Open Access Journals (Sweden)

    María Cristina Useche

    2008-09-01

    Full Text Available El objetivo central del trabajo es determinar la calidad de servicio que ofrecen las operadoras habilitadas en el sector de telecomunicaciones en Venezuela para prestar el servicio de Internet en el municipio Maracaibo. El mismo se basó en un tipo de investigación descriptivo- transaccional, abordando el objeto de estudio desde las perspectivas de Zeithaml y Bitner (2002, Pride y Ferrel (1997, Lovelock (1997, Cobra (2000 y Parasuraman, Zeithaml y Berry (2002. Se aplicó el muestreo aleatorio estratificado proporcional conformado por 400 clientes en ese municipio, a la cual se aplicó un cuestionario estructurado para recopilar información necesaria para abordar el objeto de estudio. Los resultados indicaron tendencias favorables a nivel de las percepciones sobre la tangibilidad, confiabilidad, responsabilidad, seguridad y empatía; pero las expectativas encontradas fueron más altas que las percepciones, sin embargo, los rangos no fueron de mayor incidencia, lo cual indica que la calidad del servicio al cliente en las empresas evaluadas se ubica en niveles favorables. A pesar de ello, al no haber cobertura total de las expectativas de los usuarios, la calidad del servicio debe mejorar a fin de garantizar excelencia a los requerimientos, logrando la satisfacción plena de los clientes sobre la prestación del servicio de Internet en Maracaibo.

  20. Insular organization of gene space in grass genomes.

    Directory of Open Access Journals (Sweden)

    Andrea Gottlieb

    Full Text Available Wheat and maize genes were hypothesized to be clustered into islands but the hypothesis was not statistically tested. The hypothesis is statistically tested here in four grass species differing in genome size, Brachypodium distachyon, Oryza sativa, Sorghum bicolor, and Aegilops tauschii. Density functions obtained under a model where gene locations follow a homogeneous Poisson process and thus are not clustered are compared with a model-free situation quantified through a non-parametric density estimate. A simple homogeneous Poisson model for gene locations is not rejected for the small O. sativa and B. distachyon genomes, indicating that genes are distributed largely uniformly in those species, but is rejected for the larger S. bicolor and Ae. tauschii genomes, providing evidence for clustering of genes into islands. It is proposed to call the gene islands "gene insulae" to distinguish them from other types of gene clustering that have been proposed. An average S. bicolor and Ae. tauschii insula is estimated to contain 3.7 and 3.9 genes with an average intergenic distance within an insula of 2.1 and 16.5 kb, respectively. Inter-insular distances are greater than 8 and 81 kb and average 15.1 and 205 kb, in S. bicolor and Ae. tauschii, respectively. A greater gene density observed in the distal regions of the Ae. tauschii chromosomes is shown to be primarily caused by shortening of inter-insular distances. The comparison of the four grass genomes suggests that gene locations are largely a function of a homogeneous Poisson process in small genomes. Nonrandom insertions of LTR retroelements during genome expansion creates gene insulae, which become less dense and further apart with the increase in genome size. High concordance in relative lengths of orthologous intergenic distances among the investigated genomes including the maize genome suggests functional constraints on gene distribution in the grass genomes.

  1. Insular carcinoma: a distinct de novo entity among follicular carcinomas of the thyroid gland.

    Science.gov (United States)

    Pilotti, S; Collini, P; Mariani, L; Placucci, M; Bongarzone, I; Vigneri, P; Cipriani, S; Falcetta, F; Miceli, R; Pierotti, M A; Rilke, F

    1997-12-01

    We reclassified 720 nonmedullary invasive thyroid carcinomas diagnosed and treated between 1975 and 1993. Twenty-seven cases met the criteria of insular carcinoma and 29 cases those of widely invasive follicular carcinoma. Comparison of these histotypes with respect to pathologic stage and overall, relative, and visceral metastasis-free survival showed a significant association between histotype and pT and pN categories. In particular, pT4 (p AAA transversion at codon 61 of the N-RAS gene in insular carcinoma. These findings suggest that insular carcinoma represents a de novo entity distinct from widely invasive follicular carcinoma, that widely invasive follicular carcinoma has biologic characteristics more consistent with poorly differentiated than well-differentiated carcinomas, and that both insular carcinoma and widely invasive follicular carcinoma share similar molecular alterations.

  2. 34 CFR 76.131 - How does an insular area apply for a consolidated grant?

    Science.gov (United States)

    2010-07-01

    ... the Insular Area will use the funds received under the consolidated grant during the fiscal year for... consolidation of funds; and (4) Contains a budget that includes a description of the allocation of...

  3. Dopaminergic modulation of impulsive decision making in the rat insular cortex.

    Science.gov (United States)

    Pattij, Tommy; Schetters, Dustin; Schoffelmeer, Anton N M

    2014-08-15

    Neuroimaging studies have implicated the insular cortex in cognitive processes including decision making. Nonetheless, little is known about the mechanisms by which the insula contributes to impulsive decision making. In this regard, the dopamine system is known to be importantly involved in decision making processes, including impulsive decision making. The aim of the current set of experiments was to further elucidate the importance of dopamine signaling in the agranular insular cortex in impulsive decision making. This compartment of the insular cortex is highly interconnected with brain areas such as the medial prefrontal cortex, amygdala and ventral striatum which are implicated in decision making processes. Male rats were trained in a delay-discounting task and upon stable baseline performance implanted with bilateral cannulae in the agranular insular cortex. Intracranial infusions of the dopamine D1 receptor antagonist SCH23390 and dopamine D2 receptor antagonist eticlopride revealed that particularly blocking dopamine D1 receptors centered on the insular cortex promoted impulsive decision making. Together, the present results demonstrate an important role of the agranular insular cortex in impulsive decision making and, more specifically, highlight the contribution of dopamine D1-like receptors.

  4. Ecoturismo en el municipio de Choachí – Cundinamarca.

    OpenAIRE

    2012-01-01

    Esta monografía identificó los potenciales lugares ecoturísticos del Municipio de Choachí, Departamento de Cundinamarca, para lo cual se llevó a cabo una revisión de los aspectos teóricos y conceptuales sobre el turismo y las formas de hacer turismo, con base en ésta se realizó un análisis del turismo internacional y nacional como contextualización para abordar la definición de ecoturismo, su clasificación, características y aplicación. Se diseñó y aplicó una encuesta para establecer la v...

  5. Prevalencia de la violencia intrafamiliar en el municipio de Barrancabermeja

    Directory of Open Access Journals (Sweden)

    Armando Aguilera Torrado

    2011-12-01

    Full Text Available El trabajo presenta los resultados de la investigación sobre prevalencia de la violencia intrafamiliar, desarrollada en el primer semestre del 2010 en el municipio de Barrancabermeja (Santander. El estudio fue transversal de tipo descriptivo, y se desarrolló bajo los parámetros de los estudios epidemiológicos. Los resultados de la investigación muestran que la prevalencia de la violencia intrafamiliar en Barrancabermeja es del 54%. El tipo de violencia que más han sufrido los barranqueños en sus hogares es la física, en un 45%, seguida por la violencia psicológica, con un 44%, y finalmente la violencia sexual, en un 11%.

  6. Estudio de la anurofauna del municipio de Ibagué

    Directory of Open Access Journals (Sweden)

    Páez C. A.

    2000-12-01

    Full Text Available

    Colombia es considerada, en el mundo, el país más rico en especies de anfibios (Lynch, 1998. De las 4.300 especies registradas en el planeta, Colombia presenta 583 (Ruiz et al., 1996. Esto refleja la gran riqueza que el país tiene respecto a la diversidad  no sólo de anfibios, sino también de otros grupos de animales y plantas. Entre los anfibios el mayor número de especies se encuentra en el orden Anura, los comúnmente conocidos como ranas y sapos, le sigue el orden Urodela (salamandras y por ultimo esta el Apoda (cecilias. En Colombia se han reportado 540 especies de anuros, pertenecientes a 56 géneros y 9 familias (Ruiz et 01., 1996. Por otra parte, entre las regiones de Colombia con mayor aporte a la diversidad de anuros esta la Cordillera Central. Estimulados por esta riqueza de anuros y dada las amplias zonas del país aún desconocidas a nivel de inventarios, entre ellas el municipio de Ibagué, el cual por su posición geográfica en la Cordillera Central y por su variedad de niveles altitudinales, ecosistemas y el hábitat para el albergue de los anuros, se llevó a cabo el presente estudio, con el propósito de reconocer el aporte de este municipio a la diversidad descrita con respecto a la Cordillera Central ya Colombia.

  7. The Insular Cortex and the Regulation of Cardiac Function.

    Science.gov (United States)

    Oppenheimer, Stephen; Cechetto, David

    2016-04-01

    Cortical representation of the heart challenges the orthodox view that cardiac regulation is confined to stereotyped, preprogrammed and rigid responses to exteroceptive or interoceptive environmental stimuli. The insula has been the region most studied in this regard; the results of clinical, experimental, and functional radiological studies show a complex interweave of activity with patterns dynamically varying regarding lateralization and antero-posterior distribution of responsive insular regions. Either acting alone or together with other cortical areas including the anterior cingulate, medial prefrontal, and orbito-frontal cortices as part of a concerted network, the insula can imbue perceptions with autonomic color providing emotional salience, and aiding in learning and behavioral decision choice. In these functions, cardiovascular input and the right anterior insula appear to play an important, if not pivotal role. At a more basic level, the insula gauges cardiovascular responses to exteroceptive and interoceptive stimuli, taking into account memory, cognitive, and reflexive constructs thereby ensuring appropriate survival responses and maintaining emotional and physiological homeostasis. When acquired derangements to the insula occur after stroke, during a seizure or from abnormal central processing of interoceptive or exteroceptive environmental cues as in psychiatric disorders, serious consequences can arise including cardiac electrophysiological, structural and contractile dysfunction and sudden cardiac death. PMID:27065176

  8. Posterior insular cortex is necessary for conditioned inhibition of fear.

    Science.gov (United States)

    Foilb, Allison R; Flyer-Adams, Johanna G; Maier, Steven F; Christianson, John P

    2016-10-01

    Veridical detection of safety versus danger is critical to survival. Learned signals for safety inhibit fear, and so when presented, reduce fear responses produced by danger signals. This phenomenon is termed conditioned inhibition of fear. Here, we report that CS+/CS- fear discrimination conditioning over 5 days in rats leads the CS- to become a conditioned inhibitor of fear, as measured by the classic tests of conditioned inhibition: summation and retardation of subsequent fear acquisition. We then show that NMDA-receptor antagonist AP5 injected to posterior insular cortex (IC) before training completely prevented the acquisition of a conditioned fear inhibitor, while intra-AP5 to anterior and medial IC had no effect. To determine if the IC contributes to the recall of learned fear inhibition, injections of the GABAA agonist muscimol were made to posterior IC before a summation test. This resulted in fear inhibition per se, which obscured inference to the effect of IC inactivation with recall of the safety cue. Control experiments sought to determine if the role of the IC in conditioned inhibition learning could be reduced to simpler fear discrimination function, but fear discrimination and recall were unaffected by AP5 or muscimol, respectively, in the posterior IC. These data implicate a role of posterior IC in the learning of conditioned fear inhibitors.

  9. Insular Area energy vulnerability, Puerto Rico, US Virgin Islands. Technical Appendix 1

    International Nuclear Information System (INIS)

    This report was prepared in response to Section 1406 of the Energy Policy Act of 1992 (P.L. 192-486). The Act directed the Department of Energy (DOE) to ''conduct a study of the implications of the unique vulnerabilities of the insular areas to an oil supply disruption,'' and to ''outline how the insular areas shall gain access to vital oil supplies during times of national emergency.'' The Act defines the insular areas to be the US Virgin Islands and Puerto Rico in the Caribbean, and Guam, American Samoa, the Commonwealth of the Northern Mariana Islands (CNMI), and Palau in the Pacific. This report is the analysis of Puerto Rico and the US Virgin Islands. In the study, ''unique vulnerabilities'' were defined as susceptibility to: (1) more frequent or more likely interruptions of oil supplies compared to the mainland, and/or (2) disproportionately larger or more likely economic losses in the event of an oil supply disruption. In order to asses unique vulnerabilities, the study examined in the insular areas' experience during past global disruptions of oil supplies and during local emergencies caused by natural disasters. The effects of several possible future global disruptions and local emergencies were also analyzed. Analyses were based on historical data, simulations using energy and economic models, and interviews with officials in the insular governments and the energy industry

  10. Insular cortex representation of dynamic mechanical allodynia in trigeminal neuropathic rats.

    Science.gov (United States)

    Alvarez, Pedro; Dieb, Wisam; Hafidi, Aziz; Voisin, Daniel L; Dallel, Radhouane

    2009-01-01

    Dynamic mechanical allodynia is a widespread symptom of neuropathic pain for which mechanisms are still poorly understood. The present study investigated the organization of dynamic mechanical allodynia processing in the rat insular cortex after chronic constriction injury to the infraorbital nerve (IoN-CCI). Two weeks after unilateral IoN-CCI, rats showed a dramatic bilateral trigeminal dynamic mechanical allodynia. Light, moving stroking of the infraorbital skin resulted in strong, bilateral upregulation of extracellular-signal regulated kinase phosphorylation (pERK-1/2) in the insular cortex of IoN-CCI animals but not sham rats, in whose levels were similar to those of unstimulated IoN-CCI rats. pERK-1/2 was located in neuronal cells only. Stimulus-evoked pERK-1/2 immunopositive cell bodies displayed rostrocaudal gradient and layer selective distribution in the insula, being predominant in the rostral insula and in layers II-III of the dysgranular and to a lesser extent, of the agranular insular cortex. In layers II-III of the rostral dysgranular insular cortex, intense pERK also extended into distal dendrites, up to layer I. These results demonstrate that trigeminal nerve injury induces a significant alteration in the insular cortex processing of tactile stimuli and suggest that ERK phosphorylation contributes to the mechanisms underlying abnormal pain perception under this condition.

  11. Insular Area energy vulnerability, Puerto Rico, US Virgin Islands. Technical Appendix 1

    Energy Technology Data Exchange (ETDEWEB)

    Stern, M.; Willard, E.E.; Efferding, S. [Ensys Energy & Systems, Inc., Flemington, NJ (United States)

    1994-05-01

    This report was prepared in response to Section 1406 of the Energy Policy Act of 1992 (P.L. 192-486). The Act directed the Department of Energy (DOE) to ``conduct a study of the implications of the unique vulnerabilities of the insular areas to an oil supply disruption,`` and to ``outline how the insular areas shall gain access to vital oil supplies during times of national emergency.`` The Act defines the insular areas to be the US Virgin Islands and Puerto Rico in the Caribbean, and Guam, American Samoa, the Commonwealth of the Northern Mariana Islands (CNMI), and Palau in the Pacific. This report is the analysis of Puerto Rico and the US Virgin Islands. In the study, ``unique vulnerabilities`` were defined as susceptibility to: (1) more frequent or more likely interruptions of oil supplies compared to the mainland, and/or (2) disproportionately larger or more likely economic losses in the event of an oil supply disruption. In order to asses unique vulnerabilities, the study examined in the insular areas` experience during past global disruptions of oil supplies and during local emergencies caused by natural disasters. The effects of several possible future global disruptions and local emergencies were also analyzed. Analyses were based on historical data, simulations using energy and economic models, and interviews with officials in the insular governments and the energy industry.

  12. Dyscalculia, Dysgraphia, and Left-Right Confusion from a Left Posterior Peri-Insular Infarct

    Directory of Open Access Journals (Sweden)

    S. Bhattacharyya

    2014-01-01

    Full Text Available The Gerstmann syndrome of dyscalculia, dysgraphia, left-right confusion, and finger agnosia is generally attributed to lesions near the angular gyrus of the dominant hemisphere. A 68-year-old right-handed woman presented with sudden difficulty completing a Sudoku grid and was found to have dyscalculia, dysgraphia, and left-right confusion. Magnetic resonance imaging (MRI showed a focus of abnormal reduced diffusivity in the left posterior insula and temporoparietal operculum consistent with acute infarct. Gerstmann syndrome from an insular or peri-insular lesion has not been described in the literature previously. Pathological and functional imaging studies show connections between left posterior insular region and inferior parietal lobe. We postulate that the insula and operculum lesion disrupted key functional networks resulting in a pseudoparietal presentation.

  13. Dyscalculia, dysgraphia, and left-right confusion from a left posterior peri-insular infarct.

    Science.gov (United States)

    Bhattacharyya, S; Cai, X; Klein, J P

    2014-01-01

    The Gerstmann syndrome of dyscalculia, dysgraphia, left-right confusion, and finger agnosia is generally attributed to lesions near the angular gyrus of the dominant hemisphere. A 68-year-old right-handed woman presented with sudden difficulty completing a Sudoku grid and was found to have dyscalculia, dysgraphia, and left-right confusion. Magnetic resonance imaging (MRI) showed a focus of abnormal reduced diffusivity in the left posterior insula and temporoparietal operculum consistent with acute infarct. Gerstmann syndrome from an insular or peri-insular lesion has not been described in the literature previously. Pathological and functional imaging studies show connections between left posterior insular region and inferior parietal lobe. We postulate that the insula and operculum lesion disrupted key functional networks resulting in a pseudoparietal presentation. PMID:24817791

  14. Feelings of warmth correlate with neural activity in right anterior insular cortex.

    Science.gov (United States)

    Olausson, H; Charron, J; Marchand, S; Villemure, C; Strigo, I A; Bushnell, M C

    2005-11-25

    The neural coding of perception can differ from that for the physical attributes of a stimulus. Recent studies suggest that activity in right anterior insular cortex may underlie thermal perception, particularly that of cold. We now examine whether this region is also important for the perception of warmth. We applied cutaneous warm stimuli on the left leg (warmth) in normal subjects (n = 7) during functional magnetic resonance imaging (fMRI). After each stimulus, subjects rated their subjective intensity of the stimulus using a visual analogue scale (VAS), and correlations were determined between the fMRI signal and the VAS ratings. We found that intensity ratings of warmth correlated with the fMRI signal in the right (contralateral to stimulation) anterior insular cortex. These results, in conjunction with previous reports, suggest that the right anterior insular cortex is important for different types of thermal perception.

  15. Insular species of Afrotropical freshwater crabs (Crustacea: Decapoda: Brachyura: Potamonautidae and Potamidae) with special reference to Madagascar and the Seychelles

    NARCIS (Netherlands)

    Cumberlidge, N.

    2008-01-01

    The evolutionary relationships between island and mainland faunas of the 24 species of insular freshwater crabs in the Afrotropical region are reviewed in the light of phylogenetic studies. Twenty insular species of freshwater crabs are endemic, and four are also found on the neighboring mainland of

  16. El impuesto sobre inmuebles urbanos en el municipio Maracaibo

    Directory of Open Access Journals (Sweden)

    Genoveva Ángela Molero González

    2007-01-01

    Full Text Available El objetivo fundamental de este trabajo es analizar el Impuesto sobre Inmuebles Urbanos del municipio Maracaibo del Estado Zulia, para lo cual se realizó un estudio descriptivo-documental. Esta investigación se apoya en documentos y se complementa con entrevistas abiertas realizadas a funcionarios de las unidades administrativas de la Alcaldía de Maracaibo como son la Dirección de Catastro y el Servicio Autónomo Municipal de Administración Tributaria. Los resultados obtenidos permitieron: identificar los elementos del impuesto, analizar los procedimientos de recaudación, donde se observa la desactualización de la ordenanza en el sentido de tener más de treinta años y por otro lado la creación de decretos con la finalidad de incrementar el impuesto, analizar la insuficiencia que presenta el catastro municipal; examinar el comportamiento de recaudación durante el año 2003.

  17. Calodium (Capillaria hepaticum (Nematoda, Capillariidae in insular small rodent populations

    Directory of Open Access Journals (Sweden)

    Bugmyrin Sergey

    2014-12-01

    Full Text Available The data on the distribution of the nematode Calodium hepaticum (Bancroft 1893 Moravec 1982 (syn.: Capillaria hepatica, Hepaticola hepatica on the islands of Kizhi Archipelago are reported (N 62°00'; E 35°12'. Samples were collected on 18 islands and the mainland part of the Kizhi skerries region in the period from August 2005 till 2014. The method of partial helminthological dissection was applied to 346 specimens of rodents belonging to two species – the bank vole Myodes glareolus Schreber 1780 (301 spm. and the field vole Microtus agrestis Linnaeus 1761 (45 spm.. The prevalence and the abundance index of nematode were 16.6% and 1.1 in M. glareolus and 11.1%; 0.3 in M. agrestis, respectively. The highest prevalence and abundance of C. hepaticum were detected in mature voles. No sex-related differences were found. C. hepaticum was present in 12 of 19 sampling sites. On the islands where the sample number (host individuals was over 15, the highest prevalence and abundance values were 57% and 5.8 spm., respectively. Significant positive coefficients of correlation (Spearman’s and Pearson’s ones between nematode numbers and characteristics of the island were found in the pair «Prevalence – degree of isolation» (0.48 and 0.49. Single-factor analysis of variance showed that the size of the island had some effect on the nematode invasion prevalence and abundance. However, no significant regression relationship between the prevalence and abundance of nematodes and characteristics of an island was revealed by multivariate regression analysis (multiple regression: the coefficient of determination of the regression equation R2 < 0.3, and the regression coefficients were insignificant The reasons for high abundance of C. hepaticum in northern insular ecosystems are discussed. Possible key factors for the stable vitality of the parasite populations are: 1 favourable hydrothermal conditions of the soil in the shore (littoral zone; 2 the

  18. Prevalencias de las geohelmintiasis intestinales en 100 municipios de Venezuela (1989-1992

    Directory of Open Access Journals (Sweden)

    Morales C. Gustavo A.

    1999-01-01

    Full Text Available El examen coproparasitológico (técnica de Kato-Katz de un total de 113.254 personas, pertenecientes a 100 municipios de Venezuela, permitió establecer las siguientes prevalencias a nivel nacional: Ascaris lumbricoides: 26,9%, Trichuris trichiura: 32,6% y Anquilostomideos: 5,6%. Además se determinaron los valores de la prevalencia para los mencionados geohelmintos en los 100 municipios considerados observándose una gran variabilidad. Para T. trichiura los valores máximos se obtuvieron en los municipios Arévalo González (54,6%, en el Estado Miranda, Urama (76,9% en el Estado Carabobo y Punta de Piedra (78,4% en el Estado Sucre. Para A. lumbricoides, en los municipios Punta de Piedra (63% y Tunapuy (61,9%, en el Estado Sucre y Arévalo González (62,7% en el Estado Miranda. Mientras que para los Anquilostomideos las prevalencias máximas se detectaron en los municipios El Amparo (39,5% y San Camilo (35,9% en el Estado Apure. En cuanto a la edad las prevalencias más altas se determinaron en niños de edad pre-escolar y escolar, para A. lumbricoides y T. trichiura y en adolescentes y adultos para anquilostomideos.

  19. en el empoderamiento comunitario en el municipio de Muqui, Brasil

    Directory of Open Access Journals (Sweden)

    Altair Toledo-Machado

    2006-01-01

    Full Text Available El desarrollo de la estrategia del mejoramiento participativo, en las comunidades de pequeños agricultores ubicados en el municipio de Muqui, en el Estado de Espírito Santo, Brasil, influyó en la autosostenibilidad de la producción de semilla y en la obtención de variedades de maíz mejor adaptadas a sus sistemas de manejo Los agricultores de esta región vienen desarrollando, desde 1993, trabajos en el campo comunitario de semillas. A partir de 2001, como estrategias del mejoramiento participativo fueron desarrollados trabajos referentes al rescate de variedades locales y mejoradas de maíz, y ensayos de evaluación de variedades. Diez variedades fueron utilizadas en este trabajo: Sol da Manhã , Eldorado, BR 106, BR 473, BR 451, Saracura, Caiano de Sobrália, Palha Rôxa de Santa Catarina, Caiano de Espírito Santo y Fortaleza. Con excepción de las variedades BR 106, BR 473, BR 451 y Saracura, que fueron seleccionadas de forma convencional, las demás fueron seleccionadas con base en fitomejoramiento participativo. Fueron realizados tres ciclos de selección en cada una de esas variedades y las mismas fueron evaluadas en los años agrícolas de 2002/2003, 2003/2004 y 2004/2005, en ensayos en bloques al azar, con tres repeticiones y manejo orgánico. Las actividades de mejoramiento, en las comunidades de Muqui, fueran realizadas enfatizando la variedad Fortaleza, se empleó el esquema de selección masal estratificada. Los campos de semillas comunitarias se incrementaron, tanto en productividad como en la mayor participación de los agricultores, además de la participación en los ensayos y los campos de mejoramiento

  20. Morbilidad oculta por parasitismo intestinal en Lagunita, municipio Girardot, Venezuela

    Directory of Open Access Journals (Sweden)

    Yanelis Núñez Gómez

    2014-08-01

    Full Text Available Se realizó un estudio epidemiológico descriptivo de corte transversal, con el objetivo de determinar la morbilidad oculta por parasitismo intestinal en Lagunita, municipio Girardot, Venezuela; en el período de enero a octubre de 2009. El universo fue de 286 niños, lo que se corresponde con la población total del grupo de edad de menores de 15 años. De estos se seleccionaron por muestreo aleatorio simple 43 pacientes, a los que se les aplicó un cuestionario y se confeccionó una guía de observación, para describir los factores epidemiológicos que influyen en la infestación por parasitismo intestinal. Además, se les realizaron análisis de las heces fecales seriadas para el diagnóstico del parasitismo. El método estadístico fue el cálculo de las frecuencias absolutas y relativas. A través del estudio de las heces fecales seriadas se obtuvo que 27 pacientes tenían parasitosis intestinal, para una morbilidad de 62,79%, con una mayor incidencia en los niños de cinco a nueve años de edad. El sexo femenino fue el más afectado. Los factores epidemiológicos que más influyeron fueron: los malos hábitos higiénicos personales, el entorno desfavorable y el consumo de agua no potable; existió relación entre el nivel socioeconómico, los factores epidemiológicos y la morbilidad por parasitismo intestinal. Predominó la parasitosis por Entamoeba Histolytica, con 11 casos, para un 40,74%. La diarrea, las molestias abdominales y la pérdida de apetito constituyeron los principales síntomas

  1. Evaluación y cartografiado del peligro por deslizamientos en el municipio de Moa

    Directory of Open Access Journals (Sweden)

    Yexenia Viltres-Milán

    2014-10-01

    Full Text Available La ocurrencia de deslizamientos en el municipio de Moa genera situaciones de amenaza a la industria, las comunidades, las actividades socio-económicas y al medio ambiente. El presente trabajo tuvo el propósito de evaluar y cartografiar, aplicando los Sistemas de Información Geográfica (SIG, el peligro por deslizamiento en el municipio. Como basamento metodológico se utilizó la guía para el estudio de peligro, vulnerabilidad y riesgo por deslizamientos del terreno, elaborada por el Grupo Nacional de Gestión de Riesgos, del año 2012. El resultado fue el mapa de peligrosidad total por deslizamiento del municipio de Moa, a escala 1: 100 000, el cual constituye una herramienta más de gestión y reducción del riesgo en el ordenamiento territorial

  2. Calidad de vida y el desarrollo institucional de los municipios petroleros de Colombia (2000-2010

    Directory of Open Access Journals (Sweden)

    Diana Patricia Niño Muñoz

    2015-12-01

    Full Text Available Los recursos naturales pueden ser una maldición para el desarrollo humano dependiendo de las instituciones. Para determinar si un declive institucional y el deterioro de la calidad de vida se presentan en forma independiente en los municipios petroleros del país se construyeron dos índices para el periodo 2000-2010. Los resultados sugieren que hay un umbral institucional, por encima del cual la relación entre regalías per cápita y calidad institucional es negativa, una situación necesaria pero no suficiente en los municipios que sufrieron la maldición de recursos naturales y que alerta sobre las políticas de estos municipios y la nueva reglamentación de las regalías.

  3. 76 FR 66035 - Proposed Information Collection; Comment Request; Application for Insular Watch and Jewelry...

    Science.gov (United States)

    2011-10-25

    ... Watch and Jewelry Program Benefits AGENCY: International Trade Administration. ACTION: Notice. SUMMARY... and watch and jewelry duty-refunds to program producers in the U.S. insular possessions and the... is completed biannually by watch and jewelry assemblers and manufacturers. The form consists of...

  4. Zoogeography of primates in insular Southeast Asia: species-area relationships and the effects of taxonomy

    NARCIS (Netherlands)

    Nijman, V.; Meijaard, E.

    2008-01-01

    Given its complex zoogeography and large number of islands insular Southeast Asia makes an excellent subject for studying the interrelationships of species richness, island area and isolation. The islands are merely highpoints of an immense shallow continental shelf which during Pleistocene glacial

  5. vInterocepción y corteza insular: convergencia multimodal y surgimiento de la conciencia corporal

    Directory of Open Access Journals (Sweden)

    Juan Blas Couto1

    2012-01-01

    Full Text Available La interocepción como censado del estado homeostático y visceral, ha sido recientemente postulada como requisito para la conciencia de estados emocionales corporales (Craig, 2009. Vías parasimpáticas y espinotalámicas que codifican esta información corporal tienen relevo en la corteza insular. Simultáneamente, han sido descriptas otras funciones insulares implicadas en procesos conscientes, como la intencionalidad, la toma de decisiones, la conciencia sensorio-motora, la percepción temporal, reconocer la imagen visual de uno mismo o percibir confiables a otros individuos (Craig, 2009; Ibanez, Gleichgerrcht, & Manes, 2010. Esta evidencia, sumada a resultados de estudios de lesión y neuroimágenes funcionales, sugiere que la corteza insular anterior (IA sería la encargada de integrar señales multimodales cognitivas, emocionales y sociales para dirigir las conductas motivacionales que entrañan la supervivencia del individuo. En esta revisión analizamos el cúmulo de evidencia que involucran a la interocepción y al procesamiento insular integrativo en el surgimiento de estados emocionales conscientes, a través de estudios de lesiones y de técnicas de conectividad funcional en resonancia magnética funcional (RMF.

  6. The biogeography of threatened insular iguanas and opportunities for invasive vertebrate management

    Science.gov (United States)

    Tershy, Bernie R.; Newton, Kelly M.; Spatz, Dena R.; Swinnerton, Kirsty; Iverson, John B.; Fisher, Robert N.; Harlow, Peter S.; Holmes, Nick D.; Croll, Donald A.; Iverson, J.B.; Grant, T. D.; Knapp, C. R.; Pasachnik, S. A.

    2016-01-01

    Iguanas are a particularly threatened group of reptiles, with 61% of species at risk of extinction. Primary threats to iguanas include habitat loss, direct and indirect impacts by invasive vertebrates, overexploitation, and human disturbance. As conspicuous, charismatic vertebrates, iguanas also represent excellent flagships for biodiversity conservation. To assist planning for invasive vertebrate management and thus benefit threatened iguana recovery, we identified all islands with known extant or extirpated populations of Critically Endangered and Endangered insular iguana taxa as recognized by the International Union for Conservation of Nature (IUCN) Red List of Threatened Species. For each island, we determined total area, sovereignty, the presence of invasive alien vertebrates, and human population. For the 23 taxa of threatened insular iguanas we identified 230 populations, of which iguanas were extant on 185 islands and extirpated from 45 islands. Twenty-one iguana taxa (91% of all threatened insular iguana taxa) occurred on at least one island with invasive vertebrates present; 16 taxa had 100% of their population(s) on islands with invasive vertebrates present. Rodents, cats, ungulates, and dogs were the most common invasive vertebrates. We discuss biosecurity, eradication, and control of invasive vertebrates to benefit iguana recovery: (1) on islands already free of invasive vertebrates; (2) on islands with high iguana endemicity; and (3) for species and subspecies with small total populations occurring across multiple small islands. Our analyses provide an important first step toward understanding how invasive vertebrate management can be planned effectively to benefit threatened insular iguanas.

  7. Las competencias de los Cabildos Insulares: análisis y perspectivas

    OpenAIRE

    Sarmiento Acosta, Manuel Jesús

    1994-01-01

    [ES] Para cualquier jurista en formación investigar sobre un tema tan vivo y tan plagado de consecuencias prácticas es estimulante, porque los Cabildos Insulares, para bien o para mal, llevan siendo más de ochenta años las Corporaciones típicas de las Islas.

  8. Diagnóstico Territorial Integral del municipio de Ciudad Darío

    Directory of Open Access Journals (Sweden)

    Laurent Dietsch

    2010-12-01

    Full Text Available EN ESTE ARTÍCULO SE PRESENTA EL “DIAGNÓSTICO TERRITORIAL INTEGRAL de Ciudad Darío” realizado como trabajo de fin de curso de la Maestría en Desarrollo Rural de la Universidad Centroamericana. Este estudio ha buscado contribuir a la formulación de propuestas de intervención de los actores sociales del municipio de Ciudad Darío sobre los procesos estratégicos de desarrollo del territorio. Se realizó unazonificación integral del municipio, identificándose cuatro zonas: una zona alta, campesina de agricultura de subsistencia; una zona de laderas secas; una planicie seca de latifundio ganadero; y finalmente, una zona de llanos y vegas fértiles de riego semi-intensivo. Posteriormente, se identificaron y clasificaron por capital (ambiental, económico, social-humano y político-institucional y nivel territorial, los principales procesos de cambio que afectan o podrían afectar al municipio. Su análisis permitió caracterizar las principales oportunidades y amenazas para el desarrollo del territorio y, al relacionarlo con las fortalezas y debilidades identificadas en la zonificación, evidenciar los principales factores que podrían incidir en el municipio y sus principales retos. Para enfrentar estos retos, se identificaron tres ejes estratégicos: la reducción de los niveles de inseguridad alimentaria y vulnerabilidad ambiental del municipio; el fomento integral de las cadenas de producción de hortalizas; y la prevención de riesgos sociales. Para cada uno de estos ejes se ha definido un conjunto de acciones ordenadas por capital y nivel territorial, orientadas a incidir sobre los principales procesos de cambio identificados. Finalmente, se definieron ejes estratégicos transversales enfocados al desarrollo de capacidades de incidir sobre los procesos claves de desarrollo del municipio.

  9. Consecuencias de la concentración parcelaria en el municipio de Medina de Pomar (Burgos)

    OpenAIRE

    Isla Peña, Samuel

    2016-01-01

    RESUMEN El ser humano vive en constante desarrollo y este no es ajeno a la tierra y el parcelario. En este trabajo busco mostrar los grandes cambios que han sucedido en el municipio de Medina de Pomar desde los años 60 hasta la actualidad. La concentración parcelaria que se ejecutó entre 1966 y 1972 tuvo una gran incidencia también en la sociedad, economía y urbanización del municipio. Fue el detonante de un cambio profundo en la estructura económica, pasando de ser prominentemente agraria a ...

  10. A rapid sound-action association effect in human insular cortex.

    Directory of Open Access Journals (Sweden)

    Isabella Mutschler

    Full Text Available BACKGROUND: Learning to play a musical piece is a prime example of complex sensorimotor learning in humans. Recent studies using electroencephalography (EEG and transcranial magnetic stimulation (TMS indicate that passive listening to melodies previously rehearsed by subjects on a musical instrument evokes differential brain activation as compared with unrehearsed melodies. These changes were already evident after 20-30 minutes of training. The exact brain regions involved in these differential brain responses have not yet been delineated. METHODOLOGY/PRINCIPAL FINDING: Using functional mri (fmri, we investigated subjects who passively listened to simple piano melodies from two conditions: in the 'actively learned melodies' condition subjects learned to play a piece on the piano during a short training session of a maximum of 30 minutes before the fMRI experiment, and in the 'passively learned melodies' condition subjects listened passively to and were thus familiarized with the piece. We found increased fMRI responses to actively compared with passively learned melodies in the left anterior insula, extending to the left fronto-opercular cortex. The area of significant activation overlapped the insular sensorimotor hand area as determined by our meta-analysis of previous functional imaging studies. CONCLUSIONS/SIGNIFICANCE: Our results provide evidence for differential brain responses to action-related sounds after short periods of learning in the human insular cortex. As the hand sensorimotor area of the insular cortex appears to be involved in these responses, re-activation of movement representations stored in the insular sensorimotor cortex may have contributed to the observed effect. The insular cortex may therefore play a role in the initial learning phase of action-perception associations.

  11. L'alimentazione della martora in un ambiente insulare mediterraneo

    Directory of Open Access Journals (Sweden)

    F. Amato

    2003-10-01

    Full Text Available Nel Mediterraneo i carnivori sono stati raramente oggetto di studi di carattere ecologico, pur essendo diffusi su numerose isole. Inoltre i pochi lavori attualmente disponibili, in particolare quelli relativi alle loro abitudini alimentari, si basano su campioni di ridotte dimensioni e/o si riferiscono a periodi di campionamento molto brevi. Il presente studio descrive l'alimentazione della martora sull'isola d'Elba (Monte Capanne. Questo mustelide è l'unico carnivoro presente sull'isola, dove è stato probabilmente introdotto dall'uomo fin dall'antichità per tenere sotto controllo le popolazioni di roditori. Si tratta del primo lavoro italiano che analizza le abitudini alimentari della specie basato su di un consistente campione (605 feci raccolto nell'arco di 2 anni di rilevamenti (1999-2001. La componente alimentare dominante nella dieta della martora in ambiente insulare è di origine animale sia in termini di frequenza (F 89,75% che di volume totale (Vt 82,36%. I mammiferi, per la maggior parte roditori, costituiscono la categoria più importante (F 73,22%, Vt 68,06% seguono la frutta, rappresentata per lo più da rosacee (F 23,47%; Vt 16,76% e gli insetti, soprattutto coleotteri (F 20,83%; Vt 8,23%. Sono state registrate variazioni interannuali in termini di frequenza per il consumo della frutta (G = 8,85, df = 1, p = 0,003 e di volume per il consumo dei mammiferi (U = 24129, p = 0,003. Il contributo alla dieta delle 3 principali categorie alimentari varia significativamente tra le stagioni (p = 0,0001: i mammiferi dominano nettamente sulle altre categorie nel periodo autunno-invernale, mentre in primavera-estate, anche il consumo degli insetti e della frutta, oltre a quello dei mammiferi, diventa importante. La predazione sui ratti e sul topo selvatico si concentra significativamente in inverno ed in primavera (p < 0,0001, mentre in estate ed in autunno il roditore più frequentemente predato è il ghiro (p < 0,0001. Il consumo delle

  12. Exploring Monte Carlo methods

    CERN Document Server

    Dunn, William L

    2012-01-01

    Exploring Monte Carlo Methods is a basic text that describes the numerical methods that have come to be known as "Monte Carlo." The book treats the subject generically through the first eight chapters and, thus, should be of use to anyone who wants to learn to use Monte Carlo. The next two chapters focus on applications in nuclear engineering, which are illustrative of uses in other fields. Five appendices are included, which provide useful information on probability distributions, general-purpose Monte Carlo codes for radiation transport, and other matters. The famous "Buffon's needle proble

  13. SAN CARLOS APACHE PAPERS.

    Science.gov (United States)

    ROESSEL, ROBERT A., JR.

    THE FIRST SECTION OF THIS BOOK COVERS THE HISTORICAL AND CULTURAL BACKGROUND OF THE SAN CARLOS APACHE INDIANS, AS WELL AS AN HISTORICAL SKETCH OF THE DEVELOPMENT OF THEIR FORMAL EDUCATIONAL SYSTEM. THE SECOND SECTION IS DEVOTED TO THE PROBLEMS OF TEACHERS OF THE INDIAN CHILDREN IN GLOBE AND SAN CARLOS, ARIZONA. IT IS DIVIDED INTO THREE PARTS--(1)…

  14. San Carlo Operaen

    DEFF Research Database (Denmark)

    Holm, Bent

    2005-01-01

    En indplacering af operahuset San Carlo i en kulturhistorisk repræsentationskontekst med særligt henblik på begrebet napolalità.......En indplacering af operahuset San Carlo i en kulturhistorisk repræsentationskontekst med særligt henblik på begrebet napolalità....

  15. Impaired anterior insular activation during risky decision making in young adults with internet gaming disorder.

    Science.gov (United States)

    Lee, Deokjong; Lee, Junghan; Yoon, Kang Joon; Kee, Namkoong; Jung, Young-Chul

    2016-05-25

    Internet gaming disorder is defined as excessive and compulsive use of the internet to engage in games that leads to clinically significant psychosocial impairment. We tested the hypothesis that individuals with internet gaming disorder would be less sensitive to high-risk situations and show aberrant brain activation related to risk prediction processing. Young adults with internet gaming disorder underwent functional MRI while performing a risky decision-making task. The healthy control group showed stronger activations within the dorsal attention network and the anterior insular cortex, which were not found in the internet gaming disorder group. Our findings imply that young adults with internet gaming disorder show impaired anterior insular activation during risky decision making, which might make them vulnerable when they need to adapt new behavioral strategies in high-risk situations. PMID:27092470

  16. Taste-Potentiated Odor Aversion Learning in Rats with Lesions of the Insular Cortex

    OpenAIRE

    Lin, Jian-You; Roman, Christopher; Reilly, Steve

    2009-01-01

    The current study assessed the influence of excitotoxic lesions of the insular cortex (IC) on taste-potentiated odor aversion (TPOA) learning. Water-deprived rats initially received a single odor-toxicosis or odor/taste-toxicosis pairing and were subsequently tested, in separate trials, with the odor and the taste stimulus. Indicating TPOA, neurologically intact rats conditioned with the odor/taste compound stimulus acquired significantly stronger odor aversions than normal rats conditioned w...

  17. Smart and sustainable power systems operations, planning, and economics of insular electricity grids

    CERN Document Server

    Catalão, João P S

    2015-01-01

    The smart grid initiative, integrating advanced sensing technologies, intelligent control methods, and bi-directional communications into the contemporary electricity grid, offers excellent opportunities for energy efficiency improvements and better integration of distributed generation, coexisting with centralized generation units within an active network. A large share of the installed capacity for recent renewable energy sources already comprises insular electricity grids, since the latter are preferable due to their high potential for renewables. However, the increasing share of

  18. Involvement of the insular cortex in regulating glucocorticoid effects on memory consolidation of inhibitory avoidance training

    OpenAIRE

    Fornari, Raquel V.; Wichmann, Romy; Atucha, Erika; Desprez, Tifany; Eggens-Meijer, Ellie; Roozendaal, Benno

    2012-01-01

    Glucocorticoids are known to enhance the consolidation of memory of emotionally arousing experiences by acting upon a network of interconnected brain regions. Although animal studies typically do not consider the insular cortex (IC) to be part of this network, the present findings indicate that the IC is importantly involved in regulating glucocorticoid effects on memory consolidation of emotionally arousing inhibitory avoidance training. The specific glucocorticoid receptor (GR) agonist RU 2...

  19. Involvement of the insular cortex in regulating glucocorticoid effects on memory consolidation of inhibitory avoidance training

    OpenAIRE

    Raquel Fornari

    2012-01-01

    Glucocorticoids are known to enhance the consolidation of memory of emotionally arousing experiences by acting upon a network of interconnected brain regions. Although animal studies typically do not consider the insular cortex (IC) to be part of this network, the present findings indicate that the IC is importantly involved in regulating glucocorticoid effects on memory consolidation of emotionally arousing inhibitory avoidance training. The specific glucocorticoid receptor agonist RU 2836...

  20. Clinical considerations and surgical approaches for low-grade gliomas in deep hemispheric locations: insular lesions.

    Science.gov (United States)

    Hinojosa, J; Gil-Robles, S; Pascual, B

    2016-10-01

    Insula and paralimbic region represent a common location for gliomas in adulthood. However, limbic and paralimbic tumors are rare in children. Reports of pediatric insular tumors are scarce in literature, and most of them are included in adult's series, so their management and outcome can be outlined only after extracting data from these reports. Due to their predominantly low grade, they usually have a benign course for some time, what make them ideal candidates for total resection. However, their intricate location and spread to key areas, including the temporal lobe, make them a surgical challenge. The transsylvian route, with or without resection of the frontal and/or temporal operculae, which requires exposure of part or all of the insula is commonly selected for insular tumor approaches. Intraoperative functional mapping is a standard procedure for resection of central region tumors in adults. In children and young individuals, awake craniotomy is not always possible and surgical planning usually relay on functional and anatomical preoperative studies. The main goal when approaching an insular tumor is to achieve the largest extent of resection to increase overall patient survival while preserving the functional status, minimizing postoperative morbidity and increasing the quality of life. The extent of resection seems to be correlated also with the control of associated (and usually intractable) epilepsy. PMID:27659830

  1. Ontogeny of neuro-insular complexes and islets innervation in the human pancreas.

    Directory of Open Access Journals (Sweden)

    Alexandra E. Proshchina

    2014-04-01

    Full Text Available The ontogeny of the neuro-insular complexes (NIC and the islets innervation in human pancreas has not been studied in detail. Our aim was to describe the developmental dynamics and distribution of the nervous system structures in the endocrine part of human pancreas. We used doublestaining with antibodies specific to pan-neural markers (neuron-specific enolase (NSE and S100 protein and to hormones of pancreatic endocrine cells. NSE and S100-positive nerves and ganglia were identified in the human fetal pancreas from gestation week (gw 10 onwards. Later the density of S100 and NSE-positive fibers increased. In adults this network was sparse. The islets innervation started to form from gw 14. NSE-containing endocrine cells were identified from gw 12 onwards. Additionally, S100-positive cells were detected both in the periphery and within some of the islets starting at gw 14. The analysis of islets innervation has shown that the fetal pancreas contained neuro-insular complexes and the number of these complexes was reduced in adults. The highest density of neuro-insular complexes is detected during middle and late fetal periods, when the mosaic islets, typical for adults, form. The close integration between the developing pancreatic islets and the nervous system structures may play an important role not only in the hormone secretion, but also in the islets morphogenesis.

  2. Monte Carlo Radiative Transfer

    CERN Document Server

    Whitney, Barbara A

    2011-01-01

    I outline methods for calculating the solution of Monte Carlo Radiative Transfer (MCRT) in scattering, absorption and emission processes of dust and gas, including polarization. I provide a bibliography of relevant papers on methods with astrophysical applications.

  3. Monte Carlo transition probabilities

    OpenAIRE

    Lucy, L. B.

    2001-01-01

    Transition probabilities governing the interaction of energy packets and matter are derived that allow Monte Carlo NLTE transfer codes to be constructed without simplifying the treatment of line formation. These probabilities are such that the Monte Carlo calculation asymptotically recovers the local emissivity of a gas in statistical equilibrium. Numerical experiments with one-point statistical equilibrium problems for Fe II and Hydrogen confirm this asymptotic behaviour. In addition, the re...

  4. Two insular regions are differentially involved in behavioral variant FTD and nonfluent/agrammatic variant PPA.

    Science.gov (United States)

    Mandelli, Maria Luisa; Vitali, Paolo; Santos, Miguel; Henry, Maya; Gola, Kelly; Rosenberg, Lynne; Dronkers, Nina; Miller, Bruce; Seeley, William W; Gorno-Tempini, Maria Luisa

    2016-01-01

    The non-fluent/agrammatic variant of primary progressive aphasia (nfvPPA) and the behavioral variant frontotemporal dementia (bvFTD) are focal neurodegenerative disorders belonging to the FTD-spectrum clinical syndromes. NfvPPA is characterized by effortful speech and/or agrammatism and left frontal atrophy, while bvFTD is characterized by social-emotional dysfunction often accompanied by right-lateralized frontal damage. Despite their contrasting clinical presentations, both disorders show prominent left anterior insula atrophy. We investigated differential patterns of insular sub-region atrophy in nfvPPA and bvFTD. Based on knowledge of insular connectivity and physiology, we hypothesized that the left superior precentral region of the dorsal anterior insula (SPGI) would be more atrophic in nvfPPA due to its critical role in motor speech, whereas the ventral anterior region would be more atrophied in bvFTD reflecting its known role in social-emotional-autonomic functions. Early stage nfvPPA and bvFTD patients matched for disease severity, age, gender and education and healthy controls participated in the study. Detailed clinical history, neurological examination, neuropsychological screening evaluation, and high-resolution T1-weighted brain magnetic resonance imaging (MRI) were collected. Voxel-based morphometry (VBM) was applied to perform group comparisons across the whole brain and in bilateral insula region of interest (ROI). Correlation analyses between insular sub-region atrophy and relevant clinical features were performed. Whole brain group comparisons between nfvPPA and bvFTD showed the expected predominantly left or right anterior insular atrophy pattern. ROI analysis of bilateral insula showed that the left SPGI was significantly more atrophied in nfvPPA compared to bvFTD, while the bilateral ventral anterior and right dorsal anterior insula sub-regions were more atrophied in bvFTD than nfvPPA. Only left SPGI volume correlated with speech production

  5. Two insular regions are differentially involved in behavioral variant FTD and nonfluent/agrammatic variant PPA.

    Science.gov (United States)

    Mandelli, Maria Luisa; Vitali, Paolo; Santos, Miguel; Henry, Maya; Gola, Kelly; Rosenberg, Lynne; Dronkers, Nina; Miller, Bruce; Seeley, William W; Gorno-Tempini, Maria Luisa

    2016-01-01

    The non-fluent/agrammatic variant of primary progressive aphasia (nfvPPA) and the behavioral variant frontotemporal dementia (bvFTD) are focal neurodegenerative disorders belonging to the FTD-spectrum clinical syndromes. NfvPPA is characterized by effortful speech and/or agrammatism and left frontal atrophy, while bvFTD is characterized by social-emotional dysfunction often accompanied by right-lateralized frontal damage. Despite their contrasting clinical presentations, both disorders show prominent left anterior insula atrophy. We investigated differential patterns of insular sub-region atrophy in nfvPPA and bvFTD. Based on knowledge of insular connectivity and physiology, we hypothesized that the left superior precentral region of the dorsal anterior insula (SPGI) would be more atrophic in nvfPPA due to its critical role in motor speech, whereas the ventral anterior region would be more atrophied in bvFTD reflecting its known role in social-emotional-autonomic functions. Early stage nfvPPA and bvFTD patients matched for disease severity, age, gender and education and healthy controls participated in the study. Detailed clinical history, neurological examination, neuropsychological screening evaluation, and high-resolution T1-weighted brain magnetic resonance imaging (MRI) were collected. Voxel-based morphometry (VBM) was applied to perform group comparisons across the whole brain and in bilateral insula region of interest (ROI). Correlation analyses between insular sub-region atrophy and relevant clinical features were performed. Whole brain group comparisons between nfvPPA and bvFTD showed the expected predominantly left or right anterior insular atrophy pattern. ROI analysis of bilateral insula showed that the left SPGI was significantly more atrophied in nfvPPA compared to bvFTD, while the bilateral ventral anterior and right dorsal anterior insula sub-regions were more atrophied in bvFTD than nfvPPA. Only left SPGI volume correlated with speech production

  6. CERN honours Carlo Rubbia

    CERN Document Server

    2009-01-01

    Carlo Rubbia turned 75 on March 31, and CERN held a symposium to mark his birthday and pay tribute to his impressive contribution to both CERN and science. Carlo Rubbia, 4th from right, together with the speakers at the symposium.On 7 April CERN hosted a celebration marking Carlo Rubbia’s 75th birthday and 25 years since he was awarded the Nobel Prize for Physics. "Today we will celebrate 100 years of Carlo Rubbia" joked CERN’s Director-General, Rolf Heuer in his opening speech, "75 years of his age and 25 years of the Nobel Prize." Rubbia received the Nobel Prize along with Simon van der Meer for contributions to the discovery of the W and Z bosons, carriers of the weak interaction. During the symposium, which was held in the Main Auditorium, several eminent speakers gave lectures on areas of science to which Carlo Rubbia made decisive contributions. Among those who spoke were Michel Spiro, Director of the French National Insti...

  7. Factores latentes del desarrollo en los municipios de la Región de Murcia.

    Directory of Open Access Journals (Sweden)

    José Alberto Hermoso Gutiérrez

    2004-01-01

    Full Text Available Un concepto de gran importancia dentro de la Economía lo constituye el desarrollo de una población, y en particular, el desarrollo económico-comercial de poblaciones. En nuestro caso, nos centraremos en los municipios de la Comunidad Autónoma de la Región de Murcia, con el fin de analizar las analogías y diferencias existentes entre ellos. En este trabajo, determinaremos factores latentes del desarrollo de los municipios de la Región de Murcia, a través de un conjunto de variables de carácter económico-comercial observadas sobre dichas poblaciones. Asimismo, analizaremos si existen diferencias de tipo económico-comercial, entre grupos homogéneos para el desarrollo, de municipios de la Comunidad Autónoma de la Región de Murcia y obtendremos una representación gráfica del posicionamiento relativo de éstos, aplicando el Análisis Canónico de Poblaciones.

  8. La movilidad y la distribución del ingreso en los municipios de Coahuila

    Directory of Open Access Journals (Sweden)

    Luis Gutiérrez Flores

    2011-01-01

    Full Text Available En este artículo se analiza la dinámica en la distribución del ingreso de los municipios del estado de Coahuila, de 1970 a 2000. Para esto se utilizan herramientas de creciente aceptación, como alternativas para estudiar la dinámica en las desigualdades regionales: las cadenas de Markov y las funciones de densidad. En este caso, el análisis se desagrega hasta el municipio, con el objetivo de conocer cómo interactúan dichas unidades económicas entre sí, un contexto que tendría que enriquecer la literatura del tema, aún escasa en comparación con los trabajos que emplean metodologías predominantes, como la ecuación clásica de convergencia. Los resultados indican que en los municipios hay una inmovilidad relativa en términos de ingresos, es decir, que no hay cambios importantes en su distribución, la cual, a la vez, se encuentra polarizada.

  9. Impacto de la concentración parcelaria en el paisaje de un municipio del sur de Salamanca, en una zona de espacios naturales protegidos

    Directory of Open Access Journals (Sweden)

    García Rodríguez, María del Pilar

    2011-12-01

    Full Text Available The objective of this paper is to analyse the impacts caused by the concentration of land holdings on the landscape of Escurial de la Sierra, a village located in the south of the province of Salamanca (Spain. This village is part of the Biosphere Reserve of the Francia and Bejar mountain ranges (UNESCO 2006 due to the importance of its vegetation/flora, fauna and landscape. In order to observe the effect of the concentrations, several satellite images taken before and after the concentration process have been compared. The creation of 8 metre wide tracks by cutting trees and flattening the land has caused the disappearance of many hectares of forests which were either mature or in a process of regeneration. The fencing of the new parcels of land is causing the fragmentation and insularity of the land, resulting in a major impact on the metapoblational dynamics of the rich invertebrate land fauna.

    [es] El objetivo del trabajo es analizar el impacto que la concentración parcelaria ha provocado en el paisaje del municipio de Escurial de la Sierra situado en el sur de la provincia de Salamanca (España. Se encuadra dentro de la Reserva de la Biosfera de las Sierras de Francia y Béjar (UNESCO 2006 con valores florísticos, faunísticos y paisajísticos muy importantes. Para ver los efectos de la concentración se comparan imágenes de satélite anteriores y posteriores a ella. La creación de pistas con desbroce y aplanamiento de hasta 8 m de anchura ha provocado la desaparición de numerosas hectáreas de bosque maduro o en recuperación. El vallado al que se están sometiendo las nuevas parcelas provoca una fragmentación e insularización del territorio con el consiguiente impacto sobre los sistemas de dinámica metapoblacional de la rica fauna de vertebrados terrestres. [fr] L’objectif de l’étude est d’analyser l’impact que la concentration parcellerait a provoqué dans le paysage de la municipalité d’Escurial de la

  10. The Virtual Monte Carlo

    CERN Document Server

    Hrivnacova, I; Berejnov, V V; Brun, R; Carminati, F; Fassò, A; Futo, E; Gheata, A; Caballero, I G; Morsch, Andreas

    2003-01-01

    The concept of Virtual Monte Carlo (VMC) has been developed by the ALICE Software Project to allow different Monte Carlo simulation programs to run without changing the user code, such as the geometry definition, the detector response simulation or input and output formats. Recently, the VMC classes have been integrated into the ROOT framework, and the other relevant packages have been separated from the AliRoot framework and can be used individually by any other HEP project. The general concept of the VMC and its set of base classes provided in ROOT will be presented. Existing implementations for Geant3, Geant4 and FLUKA and simple examples of usage will be described.

  11. El reconocimiento de los bienes de dominio público: El caso de los municipios portugueses

    Directory of Open Access Journals (Sweden)

    Susana Catarino Rua

    2016-02-01

    Full Text Available Objeto: Este trabajo tiene por objetivos analizar el mencionado en el POCAL (1999, en las NICSP del IPSASB y en diversas opiniones doctrinales con respecto al reconocimiento de los bienes de dominio público (BDP, así como verificar si existen problemas inherentes al reconocimiento de los BDP en Portugal, superables con la adopción de las NICSP. Diseño/metodología/Enfoque: Para este estudio, fue efectuada una revisión de literatura, de la posición del POCAL (1999, de las NICSP del IPSASB, y de la perspectiva doctrinal, con respecto al reconocimiento de los bienes de dominio público. Además, se realizó un estudio de la evolución de los valores de los bienes de dominio público, de los años 2006 a 2013, del total de los 308 municipios portugueses, para concluir acerca de la existencia de dificultades en el reconocimiento de estos activos y de la necesidad de adoptar los normativos internacionales. Aportaciones y Resultados: En algunos municipios portugueses, el proceso de inventario aún no está concluido, existiendo dificultades con respecto al reconocimiento de los BDP. Dichas dificultades resultan de que el POCAL (1999 no presenta los requisitos para el reconocimiento de los activos; problema superado en la NICSP nº 17 del IPSASB (2006b, que refiere esos requisitos. Adoptar un nuevo Sistema de Normalización Contable aplicable a la Administración Pública (SNC-AP, basado en las NICSP, puede ser la solución para dichas cuestiones, introduciendo criterios a considerar en el reconocimiento de los activos, que aseguren la comparabilidad de la información y de los valores del patrimonio de los municipios portugueses. Limitaciones: La inexistencia de criterios de reconocimiento a seguir por los municipios trae limitaciones al nivel de la comparabilidad de los valores de los diferentes componentes del activo presentados por los varios municipios. Valor añadido: Este trabajo nos enseña que, en Portugal, aún existen problemas con

  12. Structural basis of empathy and the domain general region in the anterior insular cortex

    Directory of Open Access Journals (Sweden)

    Isabella eMutschler

    2013-05-01

    Full Text Available Empathy is key for healthy social functioning and individual differences in empathy have strong implications for manifold domains of social behavior. Empathy comprises emotional and cognitive components, such as feeling and knowing what another person is feeling, and may also be closely linked to sensorimotor processes, which go along with the motivation and behavior to respond compassionately to another person’s feelings and to reduce another person’s pain. There is growing evidence for local plastic change in the structure of the healthy adult human brain in response to environmental demands or intrinsic factors. Here we have investigated changes in brain structure resulting from or predisposing to empathy. Structural MRI data of 101 healthy adult females was analyzed. Empathy in fictitious as well as real-life situations was assessed by using a widely used and validated self-evaluation measure. Furthermore, empathy-related structural effects were also put into the context of a functional map of the anterior insular cortex determined by activation likelihood estimate (ALE meta-analysis of previous functional imaging studies. We found that gray matter density in the left dorsal anterior insular cortex correlates with empathy and that this area overlaps with the domain general region of the anterior insula that is situated in-between functional systems involved in emotion-cognition, pain and motor tasks as determined by our meta-analysis. Thus, we propose that this insular region where we find structural differences depending on individual empathy might play a crucial role in modulating the efficiency of neural integration underlying emotional, cognitive, and sensorimotor information which is essential for global empathy.

  13. The effects of feral cats on insular wildlife: the Club-Med syndrome

    Science.gov (United States)

    Hess, Steve C.; Danner, Raymond M.; Timm, R.M.

    2012-01-01

    Domestic cats have been introduced to many of the world‘s islands where they have been particularly devastating to insular wildlife which, in most cases, evolved in the absence of terrestrial predatory mammals and feline diseases. We review the effects of predation, feline diseases, and the life history characteristics of feral cats and their prey that have contributed to the extirpation and extinction of many insular vertebrate species. The protozoan Toxoplasma gondii is a persistent land-based zoonotic pathogen hosted by cats that is known to cause mortality in several insular bird species. It also enters marine environments in cat feces where it can cause the mortality of marine mammals. Feral cats remain widespread on islands throughout the world and are frequently subsidized in colonies which caretakers often assert have little negative effect on native wildlife. However, population genetics, home range, and movement studies all suggest that there are no locations on smaller islands where these cats cannot penetrate within two generations. While the details of past vertebrate extinctions were rarely documented during contemporary time, a strong line of evidence is emerging that the removal of feral cats from islands can rapidly facilitate the recolonization of extirpated species, particularly seabirds. Islands offer unique, mostly self-contained ecosystems in which to conduct controlled studies of the effects of feral cats on wildlife, having implications for continental systems. The response of terrestrial wildlife such as passerine birds, small mammals, and herptiles still needs more thorough long-term monitoring and documentation after the removal of feral cats.

  14. Long-term monitoring of an insular population of Barbary Falcon Falco peregrinus pelegrinoides

    OpenAIRE

    Siverio, Manuel; Siverio, Felipe; Rodríguez, Beneharo; Rodríguez, Airam

    2012-01-01

    Territory spacing and breeding rates of an insular population (north-western Tenerife, Canary Islands) of Barbary Falcon Falco peregrinus pelegrinoides was studied from 1993 to 2008. The population increased constantly since the outset, from two pairs in 1993 to 12 in 2008. Mean density was 5.48 pairs per 100 km² and mean nearest neighbour distance was 3 119 m. The regularity of the spatial distribution pattern of the nests, observed in most years, may be maintained in the future despite ...

  15. Cortex Insular y su rol putativo en la configuración de trastornos Alimenticios

    OpenAIRE

    Noemí Sanagua

    2007-01-01

    El estudio neurocientífico de los desordenes alimenticios, ha experimentado importantes avances en la ultima década, posibilitando dilucidar sustratos cerebrales asociados a la configuración de diversas patologías. El lóbulo insular ha sido escasamente estudiado, trabajos de neuroimagen recientes han permitido conocer su representación anatómica, citoarquitectónica y funcional, así como su conexión con el sistema límbico y neocortex. Su activación, ha sido implicada en diversos procesos: sens...

  16. Carlo Caso (1940 - 2007)

    CERN Multimedia

    Leonardo Rossi

    Carlo Caso (1940 - 2007) Our friend and colleague Carlo Caso passed away on July 7th, after several months of courageous fight against cancer. Carlo spent most of his scientific career at CERN, taking an active part in the experimental programme of the laboratory. His long and fruitful involvement in particle physics started in the sixties, in the Genoa group led by G. Tomasini. He then made several experiments using the CERN liquid hydrogen bubble chambers -first the 2000HBC and later BEBC- to study various facets of the production and decay of meson and baryon resonances. He later made his own group and joined the NA27 Collaboration to exploit the EHS Spectrometer with a rapid cycling bubble chamber as vertex detector. Amongst their many achievements, they were the first to measure, with excellent precision, the lifetime of the charmed D mesons. At the start of the LEP era, Carlo and his group moved to the DELPHI experiment, participating in the construction and running of the HPC electromagnetic c...

  17. Fundamentals of Monte Carlo

    Energy Technology Data Exchange (ETDEWEB)

    Wollaber, Allan Benton [Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

    2016-06-16

    This is a powerpoint which serves as lecture material for the Parallel Computing summer school. It goes over the fundamentals of Monte Carlo. Welcome to Los Alamos, the birthplace of “Monte Carlo” for computational physics. Stanislaw Ulam, John von Neumann, and Nicholas Metropolis are credited as the founders of modern Monte Carlo methods. The name “Monte Carlo” was chosen in reference to the Monte Carlo Casino in Monaco (purportedly a place where Ulam’s uncle went to gamble). The central idea (for us) – to use computer-generated “random” numbers to determine expected values or estimate equation solutions – has since spread to many fields. "The first thoughts and attempts I made to practice [the Monte Carlo Method] were suggested by a question which occurred to me in 1946 as I was convalescing from an illness and playing solitaires. The question was what are the chances that a Canfield solitaire laid out with 52 cards will come out successfully? After spending a lot of time trying to estimate them by pure combinatorial calculations, I wondered whether a more practical method than “abstract thinking” might not be to lay it out say one hundred times and simply observe and count the number of successful plays... Later [in 1946], I described the idea to John von Neumann, and we began to plan actual calculations." - Stanislaw Ulam.

  18. High antipredatory efficiency of insular lizards: a warning signal of excessive specimen collection?

    Directory of Open Access Journals (Sweden)

    Miguel Delibes

    Full Text Available We live-captured lizards on islands in the Gulf of California and the Baja California peninsula mainland, and compared their ability to escape predation. Contrary to expectations, endemic lizard species from uninhabited islands fled from humans earlier and more efficiently than those from peninsular mainland areas. In fact, 58.2% (n=146 of the lizards we tried to capture on the various islands escaped successfully, while this percentage was only 14.4% (n=160 on the peninsular mainland. Separate evidence (e.g., proportion of regenerated tails, low human population at the collection areas, etc. challenges several potential explanations for the higher antipredatory efficiency of insular lizards (e.g., more predation pressure on islands, habituation to humans on the peninsula, etc.. Instead, we suggest that the ability of insular lizards to avoid predators may be related to harvesting by humans, perhaps due to the value of endemic species as rare taxonomic entities. If this hypothesis is correct, predation-related behavioral changes in rare species could provide early warning signals of their over-exploitation, thus encouraging the adoption of conservation measures.

  19. High antipredatory efficiency of insular lizards: a warning signal of excessive specimen collection?

    Science.gov (United States)

    Delibes, Miguel; Blázquez, María del Carmen; Soriano, Laura; Revilla, Eloy; Godoy, José Antonio

    2011-01-01

    We live-captured lizards on islands in the Gulf of California and the Baja California peninsula mainland, and compared their ability to escape predation. Contrary to expectations, endemic lizard species from uninhabited islands fled from humans earlier and more efficiently than those from peninsular mainland areas. In fact, 58.2% (n=146) of the lizards we tried to capture on the various islands escaped successfully, while this percentage was only 14.4% (n=160) on the peninsular mainland. Separate evidence (e.g., proportion of regenerated tails, low human population at the collection areas, etc.) challenges several potential explanations for the higher antipredatory efficiency of insular lizards (e.g., more predation pressure on islands, habituation to humans on the peninsula, etc.). Instead, we suggest that the ability of insular lizards to avoid predators may be related to harvesting by humans, perhaps due to the value of endemic species as rare taxonomic entities. If this hypothesis is correct, predation-related behavioral changes in rare species could provide early warning signals of their over-exploitation, thus encouraging the adoption of conservation measures. PMID:22216244

  20. Intraoperative diffusion tensor imaging predicts the recovery of motor dysfunction after insular lesions

    Institute of Scientific and Technical Information of China (English)

    Jinjiang Li; Xiaolei Chen; Jiashu Zhang; Gang Zheng; Xueming Lv; Fangye Li; Shen Hu; Ting Zhang; Bainan Xu

    2013-01-01

    Insular lesions remain surgically challenging because of the need to balance aggressive resection and functional protection. Motor function deficits due to corticospinal tract injury are a common complication of surgery for lesions adjacent to the internal capsule and it is therefore essential to evaluate the corticospinal tract adjacent to the lesion. We used diffusion tensor imaging to evaluate the corticospinal tract in 89 patients with insular lobe lesions who underwent surgery in Chinese PLA General Hospital from February 2009 to May 2011. Postoperative motor function evaluation revealed that 57 patients had no changes in motor function, and 32 patients suffered motor dysfunction or aggravated motor dysfunction. Of the affected patients, 20 recovered motor function during the 6–12-month follow-up, and an additional 12 patients did not recover over more than 12 months of follow-up. Following reconstruction of the corticospinal tract, fractional anisotropy comparison demonstrated that preoperative, intraoperative and follow-up normalized fractional anisotropy in the stable group was higher than in the transient deficits group or the long-term deficits group. Compared with the transient deficits group, intraoperative normalized fractional anisotropy significantly decreased in the long-term deficits group. We conclude that intraoperative fractional anisotropy values of the corticospinal tracts can be used as a prognostic indicator of motor function outcome.

  1. Monte Carlo and nonlinearities

    CERN Document Server

    Dauchet, Jérémi; Blanco, Stéphane; Caliot, Cyril; Charon, Julien; Coustet, Christophe; Hafi, Mouna El; Eymet, Vincent; Farges, Olivier; Forest, Vincent; Fournier, Richard; Galtier, Mathieu; Gautrais, Jacques; Khuong, Anaïs; Pelissier, Lionel; Piaud, Benjamin; Roger, Maxime; Terrée, Guillaume; Weitz, Sebastian

    2016-01-01

    The Monte Carlo method is widely used to numerically predict systems behaviour. However, its powerful incremental design assumes a strong premise which has severely limited application so far: the estimation process must combine linearly over dimensions. Here we show that this premise can be alleviated by projecting nonlinearities on a polynomial basis and increasing the configuration-space dimension. Considering phytoplankton growth in light-limited environments, radiative transfer in planetary atmospheres, electromagnetic scattering by particles and concentrated-solar-power-plant productions, we prove the real world usability of this advance on four test-cases that were so far regarded as impracticable by Monte Carlo approaches. We also illustrate an outstanding feature of our method when applied to sharp problems with interacting particles: handling rare events is now straightforward. Overall, our extension preserves the features that made the method popular: addressing nonlinearities does not compromise o...

  2. Fundamentals of Monte Carlo

    Energy Technology Data Exchange (ETDEWEB)

    Wollaber, Allan Benton [Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

    2016-06-16

    This is a powerpoint presentation which serves as lecture material for the Parallel Computing summer school. It goes over the fundamentals of the Monte Carlo calculation method. The material is presented according to the following outline: Introduction (background, a simple example: estimating π), Why does this even work? (The Law of Large Numbers, The Central Limit Theorem), How to sample (inverse transform sampling, rejection), and An example from particle transport.

  3. CERN honours Carlo Rubbia

    CERN Multimedia

    2009-01-01

    On 7 April CERN will be holding a symposium to mark the 75th birthday of Carlo Rubbia, who shared the 1984 Nobel Prize for Physics with Simon van der Meer for contributions to the discovery of the W and Z bosons, carriers of the weak interaction. Following a presentation by Rolf Heuer, lectures will be given by eminent speakers on areas of science to which Carlo Rubbia has made decisive contributions. Michel Spiro, Director of the French National Institute of Nuclear and Particle Physics (IN2P3) of the CNRS, Lyn Evans, sLHC Project Leader, and Alan Astbury of the TRIUMF Laboratory will talk about the physics of the weak interaction and the discovery of the W and Z bosons. Former CERN Director-General Herwig Schopper will lecture on CERN’s accelerators from LEP to the LHC. Giovanni Bignami, former President of the Italian Space Agency and Professor at the IUSS School for Advanced Studies in Pavia will speak about his work with Carlo Rubbia. Finally, Hans Joachim Sch...

  4. CERN honours Carlo Rubbia

    CERN Multimedia

    2009-01-01

    On 7 April CERN will be holding a symposium to mark the 75th birthday of Carlo Rubbia, who shared the 1984 Nobel Prize for Physics with Simon van der Meer for contributions to the discovery of the W and Z bosons, carriers of the weak interaction. Following a presentation by Rolf Heuer, lectures will be given by eminent speakers on areas of science to which Carlo Rubbia has made decisive contributions. Michel Spiro, Director of the French National Institute of Nuclear and Particle Physics (IN2P3) of the CNRS, Lyn Evans, sLHC Project Leader, and Alan Astbury of the TRIUMF Laboratory will talk about the physics of the weak interaction and the discovery of the W and Z bosons. Former CERN Director-General Herwig Schopper will lecture on CERN’s accelerators from LEP to the LHC. Giovanni Bignami, former President of the Italian Space Agency, will speak about his work with Carlo Rubbia. Finally, Hans Joachim Schellnhuber of the Potsdam Institute for Climate Research and Sven Kul...

  5. Who Writes Carlos Bulosan?

    Directory of Open Access Journals (Sweden)

    Charlie Samuya Veric

    2001-12-01

    Full Text Available The importance of Carlos Bulosan in Filipino and Filipino-American radical history and literature is indisputable. His eminence spans the pacific, and he is known, diversely, as a radical poet, fictionist, novelist, and labor organizer. Author of the canonical America Iis the Hearts, Bulosan is celebrated for chronicling the conditions in America in his time, such as racism and unemployment. In the history of criticism on Bulosan's life and work, however, there is an undeclared general consensus that views Bulosan and his work as coherent permanent texts of radicalism and anti-imperialism. Central to the existence of such a tradition of critical reception are the generations of critics who, in more ways than one, control the discourse on and of Carlos Bulosan. This essay inquires into the sphere of the critical reception that orders, for our time and for the time ahead, the reading and interpretation of Bulosan. What eye and seeing, the essay asks, determine the perception of Bulosan as the angel of radicalism? What is obscured in constructing Bulosan as an immutable figure of the political? What light does the reader conceive when the personal is brought into the open and situated against the political? the essay explores the answers to these questions in Bulosan's loving letters to various friends, strangers, and white American women. The presence of these interrogations, the essay believes, will secure ultimately the continuing importance of Carlos Bulosan to radical literature and history.

  6. Herramienta para la estratificación de municipios en zonas de riesgo para la salud

    OpenAIRE

    López Caviedes, Marco Antonio

    2004-01-01

    El programa "Atención Integral" de los Servicios de Salud de Hidalgo (SSH) está enfocado a reducir los niveles de enfermedad de las diferentes localidades que integran al Estado de Hidalgo, con un presupuesto autorizado limitado. Para realizar este trabajo, se determinaron cuáles de los 84 municipios que conforman el Estado de Hidalgo presentan los mayores índices de rezago en atención a la salud, carencia de recursos y marginalidad. Obteniendo una estructuración (agrupamiento) en cuatro zona...

  7. Calidad de vida y el desarrollo institucional de los municipios petroleros de Colombia (2000-2010)

    OpenAIRE

    Diana Patricia Niño Muñoz

    2015-01-01

    Los recursos naturales pueden ser una maldición para el desarrollo humano dependiendo de las instituciones. Para determinar si un declive institucional y el deterioro de la calidad de vida se presentan en forma independiente en los municipios petroleros del país se construyeron dos índices para el periodo 2000-2010. Los resultados sugieren que hay un umbral institucional, por encima del cual la relación entre regalías per cápita y calidad institucional es negativa, una situación necesaria per...

  8. La participacion femenina en el programa integral de Deporte Escolar del municipio de Segovia

    OpenAIRE

    Escudero Valenzuela, José A.

    2012-01-01

    La investigación tiene como principal objetivo analizar la participación de las chicas inscritas en el Programa Integral de Deporte Escolar del municipio de Segovia Hemos realizado una revisión una revisión sobre los antecedentes que nos sitúan y contextualizan el PIDEMSG apoyado por la revisión bibliográfica correspondiente. Se ha realizado un estudio de casos; utilizando la entrevista, la observación y el cuaderno de investigación como principales técnicas de recogida de datos. El ...

  9. Balanced scorecard en las empresas mixtas petroleras del municipio Maracaibo del estado Zulia

    OpenAIRE

    Alvaro Finali; Linda Chacín

    2014-01-01

    La presente investigación, tuvo como objetivo identificar las perspectivas basadas en el enfoque del Balanced Scorecard en las empresas mixtas petroleras del municipio Maracaibo del estado Zulia. El sustento teórico utilizado para el estudio, se enmarcó en los aportes realizados por Caycho (2010), Kaplan y Norton, (2004), López (2001), Muñiz y Monfort (2005), Niven (2003), Pérez (2003), Rampersad (2005), Solano et al (2002), entre otros. El presente estudio es de tipo descriptivo, de campo, n...

  10. El presupuesto público en la gestión eficiente de los municipios

    OpenAIRE

    Carlos Arturo Gómez R.

    2004-01-01

    El presente artículo plantea la necesidad de realizar un cambio en el proceso del presupuesto público colombiano, de manera que permita llevar a la práctica los planes de desarrollo elaborados con la participación ciudadana, pasando de un sistema rígido donde se estimula el gasto a un sistema orientado a resultados que tenga en cuenta los objetivos definidos y el impacto social de cada partida asignada. De esta manera, los municipios colombianos, enmarcados en el proceso de descentralización ...

  11. Gasto no obligatorio de los municipios. Una muestra de ayuntamientos valencianos

    OpenAIRE

    Margareto Layunta, Leonardo

    2015-01-01

    El Ayuntamiento es la institución de Gobierno que mayores presiones recibe, al ser la más accesible para los ciudadanos, como instancia de poder más próxima y los municipios, por su parte, intentan responder a esa presión financiando una serie de gastos que no recogen como obligatorios ni la Ley Reguladora de las Bases del Régimen Local (LBRL), aprobada en 2005 , ni el resto de leyes que abordan esta cuestión. La legislación vigente establece cuáles son las obligaciones que deben atende...

  12. Talento humano y trabajo en equipo del personal directivo de las universidades del municipio Maracaibo

    OpenAIRE

    Maribel Medina Fuenmayor

    2010-01-01

    El propósito de esta investigación fue determinar la relación entre talento humano y trabajo en equipo del personal directivo de las universidades del Municipio Maracaibo, sobre la base de los enfoques teóricos de Alles (2005), Dolan et al. (2003), Gubman (2000), Hayes (2002), Jericó (2001), entre otros. La investigación se tipificó como correlacional, no experimental y transversal, utilizando una población de 31 sujetos pertenecientes a la planta directiva de administración de las referidas ...

  13. What species-specific traits make a bird a better surrogate of native species richness? A test with insular avifauna

    OpenAIRE

    Carrascal, L. M.; Cayuela, L.; Palomino, D. (Desirée); Seoane, Javier

    2012-01-01

    This is an electronic version of an article published in Biological Conservation. Carrascal, L.M. et al. What species-specific traits make a bird a better surrogate of native species richness? A test with insular avifauna. Biological Conservation 152 (2012): 204-211

  14. Educación y desarrollo en un municipio rural: el caso de Pauna en Boyacá

    OpenAIRE

    Barrera Pineda, Libia Isabel

    2013-01-01

    En esta investigación se acude al estudio de caso de Pauna (Boyacá) para analizar la pertinencia de la oferta educativa del nivel medio de educación con las necesidades y expectativas formativas, laborales y/u ocupacionales de los jóvenes y las necesidades para el desarrollo del municipio al que pertenecen. Los principales resultados de esta investigación permiten establecer que el servicio educativo de este municipio no solo no es pertinente con lo que los jóvenes desean hacer en un escenari...

  15. Diagnóstico Ambiental Asociado almanejo de residuos sólidos urbanos en el Municipio de Arauca

    OpenAIRE

    Salamanca Corredor, Luis Ernesto

    2005-01-01

    El manejo de Residuos Sólidos en la actualidad en Arauca Municipio, esta siendo muy cuestionado, razón por la cual se hace indispensable la utilización de herramientas con las cuales permitan realizar una evaluación e una manera clara , sencilla y vislumbrando la realidad en todos sus ámbitos. El presente trabajo consistente en un diagnostico permitirá evaluar la situación actual del Manejo de Residuos Sólidos Urbanos en el Municipio de Arauca, teniendo en cuenta aspectos importantes como ...

  16. Spatial segregation of somato-sensory and pain activations in the human operculo-insular cortex.

    Science.gov (United States)

    Mazzola, Laure; Faillenot, Isabelle; Barral, Fabrice-Guy; Mauguière, François; Peyron, Roland

    2012-03-01

    The role of operculo-insular region in the processing of somato-sensory inputs, painful or not, is now well established. However, available maps from previous literature show a substantial overlap of cortical areas activated by these stimuli, and the region referred to as the "secondary somatosensory area (SII)" is widely distributed in the parietal operculum. Differentiating SII from posterior insula cortex, which is anatomically contiguous, is not easy, explaining why the "operculo-insular" label has been introduced to describe activations by somatosensory stimuli in this cortical region. Based on the recent cyto-architectural parcellation of the human insular/SII cortices (Eickhoff et al., 2006, Kurth et al., 2010), the present study investigates with functional MRI (fMRI), whether these structural subdivisions could subserve distinct aspects of discriminative somato-sensory functions, including pain. Responses to five types of stimuli applied on the left hand of 25 healthy volunteers were considered: i) tactile stimuli; ii) passive movements; iii) innocuous cold stimuli; iv) non-noxious warm and v) heat pain. Our results show different patterns of activation depending on the type of somato-sensory stimulation. The posterior part of SII (OP1 area), contralateral to stimuli, was the only sub-region activated by all type of stimuli and might therefore be considered as a common cortical target for different types of somato-sensory inputs. Proprioceptive stimulation by passive finger movements activated the posterior part of SII (OP1 sub-region) bilaterally and the contralateral median part of insula (PreCG and MSG). Innocuous cooling activated the contralateral posterior part of SII (OP1) and the dorsal posterior and median part of insula (OP2, PostCG). Pain stimuli induced the most widespread and intense activation that was bilateral in SII (OP1, OP4) and distributed to all sub-regions of contralateral insula (except OP2) and to the anterior part of the

  17. Insular ecosystems of the southeastern United States—A regional synthesis to support biodiversity conservation in a changing climate

    Science.gov (United States)

    Cartwright, Jennifer M.; Wolfe, William J.

    2016-08-11

    In the southeastern United States, insular ecosystems—such as rock outcrops, depression wetlands, high-elevation balds, flood-scoured riparian corridors, and insular prairies and barrens—occupy a small fraction of land area but constitute an important source of regional and global biodiversity, including concentrations of rare and endemic plant taxa. Maintenance of this biodiversity depends upon regimes of abiotic stress and disturbance, incorporating factors such as soil surface temperature, widely fluctuating hydrologic conditions, fires, flood scouring, and episodic droughts that may be subject to alteration by climate change. Over several decades, numerous localized, site-level investigations have yielded important information about the floristics, physical environments, and ecological dynamics of these insular ecosystems; however, the literature from these investigations has generally remained fragmented. This report consists of literature syntheses for eight categories of insular ecosystems of the southeastern United States, concerning (1) physical geography, (2) ecological determinants of community structures including vegetation dynamics and regimes of abiotic stress and disturbance, (3) contributions to regional and global biodiversity, (4) historical and current anthropogenic threats and conservation approaches, and (5) key knowledge gaps relevant to conservation, particularly in terms of climate-change effects on biodiversity. This regional synthesis was undertaken to discern patterns across ecosystems, identify knowledge gaps, and lay the groundwork for future analyses of climate-change vulnerability. Findings from this synthesis indicate that, despite their importance to regional and global biodiversity, insular ecosystems of the southeastern United States have been subjected to a variety of direct and indirect human alterations. In many cases, important questions remain concerning key determinants of ecosystem function. In particular, few

  18. Insular ecosystems of the southeastern United States- A regional synthesis to support biodiversity conservation in a changing climate

    Science.gov (United States)

    Cartwright, Jennifer M.; Wolfe, William J.

    2016-01-01

    In the southeastern United States, insular ecosystems—such as rock outcrops, depression wetlands, high-elevation balds, flood-scoured riparian corridors, and insular prairies and barrens—occupy a small fraction of land area but constitute an important source of regional and global biodiversity, including concentrations of rare and endemic plant taxa. Maintenance of this biodiversity depends upon regimes of abiotic stress and disturbance, incorporating factors such as soil surface temperature, widely fluctuating hydrologic conditions, fires, flood scouring, and episodic droughts that may be subject to alteration by climate change. Over several decades, numerous localized, site-level investigations have yielded important information about the floristics, physical environments, and ecological dynamics of these insular ecosystems; however, the literature from these investigations has generally remained fragmented. This report consists of literature syntheses for eight categories of insular ecosystems of the southeastern United States, concerning (1) physical geography, (2) ecological determinants of community structures including vegetation dynamics and regimes of abiotic stress and disturbance, (3) contributions to regional and global biodiversity, (4) historical and current anthropogenic threats and conservation approaches, and (5) key knowledge gaps relevant to conservation, particularly in terms of climate-change effects on biodiversity. This regional synthesis was undertaken to discern patterns across ecosystems, identify knowledge gaps, and lay the groundwork for future analyses of climate-change vulnerability. Findings from this synthesis indicate that, despite their importance to regional and global biodiversity, insular ecosystems of the southeastern United States have been subjected to a variety of direct and indirect human alterations. In many cases, important questions remain concerning key determinants of ecosystem function. In particular, few

  19. Late Miocene insular mice from the Tusco-Sardinian palaeobioprovince provide new insights on the palaeoecology of the Oreopithecus faunas.

    Science.gov (United States)

    Casanovas-Vilar, Isaac; van Dam, Jan A; Moyà-Solà, Salvador; Rook, Lorenzo

    2011-07-01

    Oreopithecus bambolii is one of the few hominoids that evolved under insular conditions, resulting in the development of unique adaptations that have fueled an intensive debate. The palaeoenvironment associated with this great ape has been the subject of great controversy as well. On the one hand, palaeobotanical data indicate that Oreopithecus likely inhabited mixed mesophytic forests interrupted by swamps; on the other hand, an abundance of hypsodont bovids points towards the existence of dry and open environments. Here, we provide a new approach based on the ecomorphology of the extinct endemic Muridae (rats and mice) of the so-called Oreopithecus faunas. Our results show that the successive species of endemic insular murids (Huerzelerimys and Anthracomys) evolved a number of adaptations observed only in extant family members that include significant proportions of grass in their diet. While this fits the pattern exhibited by large mammals, it contrasts with the available palaeobotanical information, which indicates that grasses were minor components of the vegetation. This contradiction may be explained because these endemic murids may have been adapted to the consumption of particular food items such as hard parts of aquatic plants (as shown by some extant murid species). However, because it is unlikely that the remaining herbivore mammals were adapted to this diet as well, we favour an alternative hypothesis that takes into account the peculiar ecological conditions of insular ecosystems leading to a density-dependent selective regime with strong competition. Such a regime would promote the selection of dental adaptations to increase feeding efficiency and durability of the dentition (such as hypsodonty) as seen in some fossil insular ruminants. This hypothesis requires further testing, but may partly account for parallel evolution of dental traits in phylogenetically unrelated insular mammals. PMID:21371736

  20. Competitividad de la industria de la confección del Municipio Maracaibo – Estado Zulia

    Directory of Open Access Journals (Sweden)

    Mariher Morales

    2002-01-01

    Full Text Available En el presente artículo se analiza el nivel de competitividad de la industria de la confección del municipio Maracaibo del estado Zulia, utilizando como base el instrumental teórico desarrollado por Michael Porter. La investigación es de carácter descriptivo, teniendo como principal fuente de información un estudio de campo. Entre los resultados de la investigación resaltan que la industria de la confección del municipio Maracaibo presenta un bajo nivel competitivo, evidenciando una capacidad ociosa del 50%, un alto grado de atomización e informalidad en su estructura, un bajo nivel tecnológico e insuficiencia de mano de obra especializada, así como una orientación al mercado interno. A esto se agregan dificultades asociadas con el contrabando, problemas con el financiamiento y las materias primas, entre otras. Se sugiere a los empresarios para lograr un posicionamiento en el mercado a largo plazo, desarrollar la estrategia genérica de enfoque de diferenciación con minimización de los costos, esto para aprovechar las características del consumidor maracaibero basadas en el apego a la moda y exigencias de calidad a precios justos.

  1. Insular Cortex is Critical for the Perception, Modulation, and Chronification of Pain.

    Science.gov (United States)

    Lu, Changbo; Yang, Tao; Zhao, Huan; Zhang, Ming; Meng, Fancheng; Fu, Hao; Xie, Yingli; Xu, Hui

    2016-04-01

    An increasing body of neuroimaging and electrophysiological studies of the brain suggest that the insular cortex (IC) integrates multimodal salient information ranging from sensation to cognitive-affective events to create conscious interoception. Especially with regard to pain experience, the IC has been supposed to participate in both sensory-discriminative and affective-motivational aspects of pain. In this review, we discuss the latest data proposing that subregions of the IC are involved in isolated pain networks: the posterior sensory circuit and the anterior emotional network. Due to abundant connections with other brain areas, the IC is likely to serve as an interface where cross-modal shaping of pain occurs. In chronic pain, however, this mode of emotional awareness and the modulation of pain are disrupted. We highlight some of the molecular mechanisms underlying the changes of the pain modulation system that contribute to the transition from acute to chronic pain in the IC. PMID:26898298

  2. Reduction of brain and sense organs in the fossil insular bovid Myotragus.

    Science.gov (United States)

    Köhler, Meike; Moyà-Solà, Salvador

    2004-01-01

    Our study of the fossil rupicaprine bovid Myotragus [Bate, 1909] from the Mediterranean island Majorca (Spain) provides evidence that this animal underwent significant changes (reduction) in the relative size of brain and sense organs after geographic isolation at the end of the Messinian Salinity Crisis (Miocene-Pliocene boundary, 5.2 Mya). The changes in the central nervous system of Myotragus parallel the pattern reported for domesticated animals, in which decrease in relative brain size is accompanied by a decrease in the relative size of their sense organs. We interpret the important size reduction of brain and sense organs in Myotragus as an adaptive strategy for more efficient energy use under the special environmental conditions of the insular ecosystem, characterized by absence of predation and limitation of trophic resources. PMID:14726622

  3. Introductions do not compensate for functional and phylogenetic losses following extinctions in insular bird assemblages.

    Science.gov (United States)

    Sobral, Fernando L; Lees, Alexander C; Cianciaruso, Marcus V

    2016-09-01

    The ratio of species extinctions to introductions has been comparable for many insular assemblages, suggesting that introductions could have 'compensated' for extinctions. However, the capacity for introduced species to replace ecological roles and evolutionary history lost following extinction is unclear. We investigated changes in bird functional and phylogenetic diversity in the wake of extinctions and introductions across a sample of 32 islands worldwide. We found that extinct and introduced species have comparable functional and phylogenetic alpha diversity. However, this was distributed at different positions in functional space and in the phylogeny, indicating a 'false compensation'. Introduced and extinct species did not have equivalent functional roles nor belong to similar lineages. This makes it unlikely that novel island biotas composed of introduced taxa will be able to maintain ecological roles and represent the evolutionary histories of pre-disturbance assemblages and highlights the importance of evaluating changes in alpha and beta diversity concurrently. PMID:27353518

  4. The insular cortex controls food preferences independently of taste receptor signaling

    Directory of Open Access Journals (Sweden)

    Albino J Oliveira-Maia

    2012-03-01

    Full Text Available The insular cortex (IC contains the primary sensory cortex for oral chemosensation including gustation, and its integrity is required for appropriate control of feeding behavior. However, it remains unknown whether the role of this brain area in food selection relies on the presence of peripheral taste input. Using multielectrode recordings, we found that the responses of populations of neurons in the IC of freely licking, sweet-blind Trpm5-/- mice are modulated by the rewarding postingestive effects of sucrose. FOS immunoreactivity analyses revealed that these responses are restricted to the dorsal insula. Furthermore, bilateral lesions in this area abolished taste-independent preferences for sucrose that can be conditioned in these Trpm5-/- animals while preserving their ability to detect sucrose. Overall, these findings demonstrate that even in the absence of peripheral taste input, IC regulates food choices based on postingestive signals.

  5. The insular cortex controls food preferences independently of taste receptor signaling.

    Science.gov (United States)

    Oliveira-Maia, Albino J; de Araujo, Ivan E; Monteiro, Clara; Workman, Virginia; Galhardo, Vasco; Nicolelis, Miguel A L

    2012-01-01

    The insular cortex (IC) contains the primary sensory cortex for oral chemosensation including gustation, and its integrity is required for appropriate control of feeding behavior. However, it remains unknown whether the role of this brain area in food selection relies on the presence of peripheral taste input. Using multielectrode recordings, we found that the responses of populations of neurons in the IC of freely licking, sweet-blind Trpm5(-/-) mice are modulated by the rewarding postingestive effects of sucrose. FOS immunoreactivity analyses revealed that these responses are restricted to the dorsal insula. Furthermore, bilateral lesions in this area abolished taste-independent preferences for sucrose that can be conditioned in these Trpm5(-/-) animals while preserving their ability to detect sucrose. Overall, these findings demonstrate that, even in the absence of peripheral taste input, IC regulates food choices based on postingestive signals. PMID:22403530

  6. Hospital acquired pneumonia is linked to right hemispheric peri-insular stroke.

    Directory of Open Access Journals (Sweden)

    André Kemmling

    Full Text Available PURPOSE: Hospital acquired pneumonia (HAP is a major complication of stroke. We sought to determine associations between infarction of specific brain regions and HAP. METHODS: 215 consecutive acute stroke patients with HAP (2003-2009 were carefully matched with 215 non-pneumonia controls by gender, then NIHSS, then age. Admission imaging and binary masks of infarction were registered to MNI-152 space. Regional atlas and voxel-based log-odds were calculated to assess the relationship between infarct location and the likelihood of HAP. An independently validated penalized conditional logistic regression model was used to identify HAP associated imaging regions. RESULTS: The HAP and control patients were well matched by gender (100%, age (95% within 5-years, NIHSS (98% within 1-point, infarct size, dysphagia, and six other clinical variables. Right hemispheric infarcts were more frequent in patients with HAP versus controls (43.3% vs. 34.0%, p = 0.054, whereas left hemispheric infarcts were more frequent in controls (56.7% vs. 44.7%, p = 0.012; there was no significant difference between groups in the rate of brainstem strokes (p = 1.0. Of the 10 most infarcted regions, only right insular cortex volume was different in HAP versus controls (20 vs. 12 ml, p = 0.02. In univariate analyses, the highest log-odds regions for pneumonia were right hemisphere, cerebellum, and brainstem. The best performing multivariate model selected 7 brain regions of infarction and 2 infarct volume-based variables independently associated with HAP. CONCLUSIONS: HAP is associated with right hemispheric peri-insular stroke. These associations may be related to autonomic modulation of immune mechanisms, supporting recent hypotheses of stroke mediated immune suppression.

  7. Parental Praise Correlates with Posterior Insular Cortex Gray Matter Volume in Children and Adolescents.

    Science.gov (United States)

    Matsudaira, Izumi; Yokota, Susumu; Hashimoto, Teruo; Takeuchi, Hikaru; Asano, Kohei; Asano, Michiko; Sassa, Yuko; Taki, Yasuyuki; Kawashima, Ryuta

    2016-01-01

    A positive parenting style affects psychological and cognitive development in children. Neuroimaging studies revealed that a positive parenting style influenced brain structure in children. Parental praise is a concrete behavior observed in positive parenting. Although previous psychological studies revealed a positive effect of parental praise on children, little is known about the relationship between parental praise and brain structure in children. Thus, the purpose of the present study was to determine whether there was a correlation between the parental attitude towards praising their child and gray matter volume in the children (116 boys and 109 girls; mean age, 10.6 years old). We examined the correlation between regional gray matter volume and parental praise using voxel-based morphometry (VBM) following magnetic resonance imaging (MRI). In addition, to confirm the positive effects of parental praise, we analyzed the correlation between the frequency of parental praise and personality traits in children. We showed that the parental attitude towards praising their child was significantly and positively correlated with the gray matter volume of the left posterior insular cortex in children. Moreover, we found a significant positive correlation between parental attitude towards praising their child and the personality traits of conscientiousness and openness to experience in the children. Prior studies said that gray matter volume in the posterior insula was correlated with empathy, and the functional connectivity between this area and the amygdala was associated with emotional regulation. Furthermore, the posterior insula relates to auditory function, and therefore, was likely involved in the processing of parental praise. Considering the possibility of experience-dependent plasticity, frequent parental praise would lead to increased posterior insular gray matter volume in children. Our study is the first to elucidate the relationship between a specific

  8. Colony insularity through queen control on worker social motivation in ants.

    Science.gov (United States)

    Boulay, Raphaël; Katzav-Gozansky, Tamar; Vander Meer, Robert K; Hefetz, Abraham

    2003-05-01

    We investigated the relative contribution of the queen and workers to colony nestmate recognition cues and on colony insularity in the Carpenter ant Camponotus fellah. Workers were either individually isolated, preventing contact with both queen and workers (colonial deprived, CD), kept in queenless groups, allowing only worker-worker interactions (queen deprived, QD) or in queenright (QR) groups. Two weeks post-separation QD and QR workers were amicable towards each other but both rejected their CD nestmates, which suggests that the queen does not measurably influence the colony recognition cues. By contrast, aggression between QD and QR workers from the same original colony was apparent only after six months of separation. This clearly demonstrates the power of the Gestalt and indicates that the queen is not a dominant contributor to the nestmate recognition cues in this species. Aggression between nestmates was correlated with a greater hydrocarbon (HC) profile divergence for CD than for QD and QR workers, supporting the importance of worker-worker interactions in maintaining the colony Gestalt odour. While the queen does not significantly influence nestmate recognition cues, she does influence colony insularity since within 3 days QD (queenless for six months) workers from different colony origins merged to form a single queenless colony. By contrast, the corresponding QR colonies maintained their territoriality and did not merge. The originally divergent cuticular and postpharyngeal gland HC profiles became congruent following the merger. Therefore, while workers supply and blend the recognition signal, the queen affects worker-worker interaction by reducing social motivation and tolerance of alien conspecifics. PMID:12803913

  9. Parental Praise Correlates with Posterior Insular Cortex Gray Matter Volume in Children and Adolescents

    Science.gov (United States)

    Matsudaira, Izumi; Yokota, Susumu; Hashimoto, Teruo; Takeuchi, Hikaru; Asano, Kohei; Asano, Michiko; Sassa, Yuko; Taki, Yasuyuki; Kawashima, Ryuta

    2016-01-01

    A positive parenting style affects psychological and cognitive development in children. Neuroimaging studies revealed that a positive parenting style influenced brain structure in children. Parental praise is a concrete behavior observed in positive parenting. Although previous psychological studies revealed a positive effect of parental praise on children, little is known about the relationship between parental praise and brain structure in children. Thus, the purpose of the present study was to determine whether there was a correlation between the parental attitude towards praising their child and gray matter volume in the children (116 boys and 109 girls; mean age, 10.6 years old). We examined the correlation between regional gray matter volume and parental praise using voxel-based morphometry (VBM) following magnetic resonance imaging (MRI). In addition, to confirm the positive effects of parental praise, we analyzed the correlation between the frequency of parental praise and personality traits in children. We showed that the parental attitude towards praising their child was significantly and positively correlated with the gray matter volume of the left posterior insular cortex in children. Moreover, we found a significant positive correlation between parental attitude towards praising their child and the personality traits of conscientiousness and openness to experience in the children. Prior studies said that gray matter volume in the posterior insula was correlated with empathy, and the functional connectivity between this area and the amygdala was associated with emotional regulation. Furthermore, the posterior insula relates to auditory function, and therefore, was likely involved in the processing of parental praise. Considering the possibility of experience-dependent plasticity, frequent parental praise would lead to increased posterior insular gray matter volume in children. Our study is the first to elucidate the relationship between a specific

  10. Suppressive responses by visual food cues in postprandial activities of insular cortex as revealed by magnetoencephalography.

    Science.gov (United States)

    Yoshikawa, Takahiro; Tanaka, Masaaki; Ishii, Akira; Watanabe, Yasuyoshi

    2014-06-01

    'Hara-Hachibu' in Japanese means a subjective sense by which we stop eating just before the motivation to eat is completely lost, a similar concept to caloric restriction (CR). Insular cortex is a critical platform which integrates sensory information into decision-making processes in eating behavior. We compared the responses of insular cortex, as assessed by magnetoencephalography (MEG), immediately after presentation of food images in the Fasting condition with those in the 'Hara-Hachibu' condition. Eleven healthy, right-handed males [age, 27.2±9.6 years; body mass index, 22.6±2.1kg/m(2) (mean±SD)] were enrolled in a randomized, two-crossover experiment (Fasting and 'Hara-Hachibu' conditions). Before the MEG recordings in the 'Hara-Hachibu' condition, the participants consumed rice balls as much as they judged themselves to have consumed shortly before reaching satiety. During the MEG recordings, they viewed food pictures projected on a screen. The intensities of MEG responses to viewing food pictures were significantly lower in the 'Hara-Hachibu' condition than those in the Fasting condition (P<0.05). The intensities of the MEG responses to the visual food stimuli in the 'Hara-Hachibu' condition was positively associated with the factor-3 (food tasted) (r=0.693, P=0.018) and aggregated scores (r=0.659, P=0.027) of the Power of Food Scale, a self-report measure of hedonic hunger. These findings may help to elucidate the neural basis of variability of appetite phenotypes under the condition of CR among individuals, and to develop possible strategies for the maintenance of adequate CR in daily life.

  11. Parental Praise Correlates with Posterior Insular Cortex Gray Matter Volume in Children and Adolescents.

    Science.gov (United States)

    Matsudaira, Izumi; Yokota, Susumu; Hashimoto, Teruo; Takeuchi, Hikaru; Asano, Kohei; Asano, Michiko; Sassa, Yuko; Taki, Yasuyuki; Kawashima, Ryuta

    2016-01-01

    A positive parenting style affects psychological and cognitive development in children. Neuroimaging studies revealed that a positive parenting style influenced brain structure in children. Parental praise is a concrete behavior observed in positive parenting. Although previous psychological studies revealed a positive effect of parental praise on children, little is known about the relationship between parental praise and brain structure in children. Thus, the purpose of the present study was to determine whether there was a correlation between the parental attitude towards praising their child and gray matter volume in the children (116 boys and 109 girls; mean age, 10.6 years old). We examined the correlation between regional gray matter volume and parental praise using voxel-based morphometry (VBM) following magnetic resonance imaging (MRI). In addition, to confirm the positive effects of parental praise, we analyzed the correlation between the frequency of parental praise and personality traits in children. We showed that the parental attitude towards praising their child was significantly and positively correlated with the gray matter volume of the left posterior insular cortex in children. Moreover, we found a significant positive correlation between parental attitude towards praising their child and the personality traits of conscientiousness and openness to experience in the children. Prior studies said that gray matter volume in the posterior insula was correlated with empathy, and the functional connectivity between this area and the amygdala was associated with emotional regulation. Furthermore, the posterior insula relates to auditory function, and therefore, was likely involved in the processing of parental praise. Considering the possibility of experience-dependent plasticity, frequent parental praise would lead to increased posterior insular gray matter volume in children. Our study is the first to elucidate the relationship between a specific

  12. Colony insularity through queen control on worker social motivation in ants.

    Science.gov (United States)

    Boulay, Raphaël; Katzav-Gozansky, Tamar; Vander Meer, Robert K; Hefetz, Abraham

    2003-05-01

    We investigated the relative contribution of the queen and workers to colony nestmate recognition cues and on colony insularity in the Carpenter ant Camponotus fellah. Workers were either individually isolated, preventing contact with both queen and workers (colonial deprived, CD), kept in queenless groups, allowing only worker-worker interactions (queen deprived, QD) or in queenright (QR) groups. Two weeks post-separation QD and QR workers were amicable towards each other but both rejected their CD nestmates, which suggests that the queen does not measurably influence the colony recognition cues. By contrast, aggression between QD and QR workers from the same original colony was apparent only after six months of separation. This clearly demonstrates the power of the Gestalt and indicates that the queen is not a dominant contributor to the nestmate recognition cues in this species. Aggression between nestmates was correlated with a greater hydrocarbon (HC) profile divergence for CD than for QD and QR workers, supporting the importance of worker-worker interactions in maintaining the colony Gestalt odour. While the queen does not significantly influence nestmate recognition cues, she does influence colony insularity since within 3 days QD (queenless for six months) workers from different colony origins merged to form a single queenless colony. By contrast, the corresponding QR colonies maintained their territoriality and did not merge. The originally divergent cuticular and postpharyngeal gland HC profiles became congruent following the merger. Therefore, while workers supply and blend the recognition signal, the queen affects worker-worker interaction by reducing social motivation and tolerance of alien conspecifics.

  13. Designing an Information System for the Preservation of the Insular Tropical Environment of Reunion Island

    Science.gov (United States)

    Conruyt, Noël; Sébastien, Didier; Courdier, Rémy; David, Daniel; Sébastien, Nicolas; Ralambondrainy, Tiana

    Decision-makers who wish to manage Insular Tropical Environments more efficiently need to narrow the gap between the production of scientific knowledge in universities, or other labs, and its pragmatic use by the general public and administrations. Today, one of the main challenges concerning the environment is the preservation of the biodiversity of ecosystems that suffer from urban and agricultural pressure. As we can only protect what we know, it is all the more important to share expert knowledge about habitats and species by using Internet in order to educate the public about their wealth and beauty. Based on Reunion Island, and taking into consideration an expected population growth of over 30% in the next twenty years, we are working to predict the human impact on this closed territory. To help tackle these two questions about biodiversity and land consumption, we have designed an Information System (IS) in the framework of the ETIC program. Our aim is to enhance insular tropical environment research in order to help the Reunion National Park to manage its protected territory. On the one hand, biodiversity research is handled statically, using knowledge bases and databases, to enhance Systematics and ecological university research. On the other hand, spatial planning concerns are treated dynamically, using multi-agent systems to simulate population densification movements. These software technologies have been implemented and integrated through a common architectural system in the ETIC program. They were conceived using Web Services that allow each module to communicate its functionalities and information with one another, as well as with external systems.

  14. Optimization of Monte Carlo simulations

    OpenAIRE

    Bryskhe, Henrik

    2009-01-01

    This thesis considers several different techniques for optimizing Monte Carlo simulations. The Monte Carlo system used is Penelope but most of the techniques are applicable to other systems. The two mayor techniques are the usage of the graphics card to do geometry calculations, and raytracing. Using graphics card provides a very efficient way to do fast ray and triangle intersections. Raytracing provides an approximation of Monte Carlo simulation but is much faster to perform. A program was ...

  15. Corticotrigeminal projections from the insular cortex to the trigeminal caudal subnucleus regulate orofacial pain after nerve injury via extracellular signal-regulated kinase activation in insular cortex neurons

    Directory of Open Access Journals (Sweden)

    Jian eWang

    2015-12-01

    Full Text Available Cortical neuroplasticity alterations are implicated in the pathophysiology of chronic orofacial pain. However, the relationship between critical cortex excitability and orofacial pain maintenance has not been fully elucidated. We recently demonstrated a top-down corticospinal descending pain modulation pathway from the anterior cingulate cortex (ACC to the spinal dorsal horn that could directly regulate nociceptive transmission. Thus, we aimed to investigate possible corticotrigeminal connections that directly influence orofacial nociception in rats. Infraorbital nerve chronic constriction injury (IoN-CCI induced significant orofacial nociceptive behaviors as well as pain-related negative emotions such as anxiety/depression in rats. By combining retrograde and anterograde tract tracing, we found powerful evidence that the trigeminal caudal subnucleus (Vc, especially the superficial laminae (I/II, received direct descending projections from granular and dysgranular parts of the insular cortex (IC. Extracellular signal-regulated kinase (ERK, an important signaling molecule involved in neuroplasticity, was significantly activated in the IC following IoN-CCI. Moreover, in IC slices from IoN-CCI rats, U0126, an inhibitor of ERK activation, decreased both the amplitude and the frequency of spontaneous excitatory postsynaptic currents (sEPSCs and reduced the paired-pulse ratio (PPR of Vc-projecting neurons. Additionally, U0126 also reduced the number of action potentials in the Vc-projecting neurons. Finally, intra-IC infusion of U0126 obviously decreased Fos expression in the Vc, accompanied by the alleviation of both nociceptive behavior and negative emotions. Thus, the corticotrigeminal descending pathway from the IC to the Vc could directly regulate orofacial pain, and ERK deactivation in the IC could effectively alleviate neuropathic pain as well as pain-related negative emotions in IoN-CCI rats, probably through this top-down pathway. These

  16. Vivir en riesgo, dormir seguro: Participa en las actividades de prevención de desastres de tu municipio

    OpenAIRE

    Banco Interamericano de Desarrollo (BID)

    2006-01-01

    Este folleto presenta las actividades de prevención de desastres en las ciudades de Estelí (Nicaragua), La Mancomunidad de Municipios del Centro del Departamento de Atlántida (Honduras), Managua (Nicaragua), San Salvador (El Salvador) y San Pedro Sula (Honduras).

  17. Implantación de red pública Wi-Fi en el municipio de Begur

    OpenAIRE

    Fernández Nevado, Raúl

    2013-01-01

    El proyecto contempla la instalación de una red WiFi de uso público para el municipio ampurdanés de Begur. Se ha empleado tecnología Radwin, Aruba, Netgear y Fortinet y software de emulación R-Planner y Ekahau.

  18. Environmental drivers of megafaunal assemblage composition and biomass distribution over mainland and insular slopes of the Balearic Basin (Western Mediterranean)

    Science.gov (United States)

    Fanelli, E.; Cartes, J. E.; Papiol, V.; López-Pérez, C.

    2013-08-01

    The influence of mesoscale physical and trophic variables on deep-sea megafauna, a scale of variation often neglected in deep-sea studies, is crucial for understanding their role in the ecosystem. Drivers of megafaunal assemblage composition and biomass distribution have been investigated in two contrasting areas of the Balearic basin in the NW Mediterranean: on the mainland slope (Catalonian coasts) and on the insular slope (North of Mallorca, Balearic Islands). An experimental bottom trawl survey was carried out during summer 2010, at stations in both sub-areas located between 450 and 2200 m water depth. Environmental data were collected simultaneously: near-bottom physical parameters, and the elemental and isotopic composition of sediments. Initially, data were analysed along the whole depth gradient, and then assemblages from the two areas were compared. Analysis of the trawls showed the existence of one group associated with the upper slope (US=450-690 m), another with the middle slope (MS=1000-1300 m) and a third with the lower slope (LS=1400-2200 m). Also, significant differences in the assemblage composition were found between mainland and insular slopes at MS. Dominance by different species was evident when the two areas were compared by SIMPER analysis. The greatest fish biomass was recorded in both areas at 1000-1300 m, a zone linked to minimum temperature and maximum O2 concentration on the bottom. Near the mainland, fish assemblages were best explained (43% of total variance, DISTLM analysis) by prey availability (gelatinous zooplankton biomass). On the insular slope, trophic webs seemed less complex and were based on vertical input of surface primary production. Decapods, which reached their highest biomass values on the upper slope, were correlated with salinity and temperature in both the areas. However, while hydrographic conditions (temperature and salinity) seemed to be the most important variables over the insular slope, resource availability

  19. Isolated insular strokes and plasma MR-proANP levels are associated with newly diagnosed atrial fibrillation: a pilot study.

    Directory of Open Access Journals (Sweden)

    Karl Frontzek

    Full Text Available INTRODUCTION: In this study, we assessed the relationship of insular strokes and plasma MR-proANP levels with newly diagnosed atrial fibrillation (NDAF. METHODS: This study is based on a prospective acute stroke cohort (http://www.clinicaltrials.gov, NCT00390962. Patient eligibility was dependent on the diagnosis of acute ischemic stroke, absence of previous stroke based on past medical history and MRI, no history of AF and congestive heart failure (cohort A and, additionally, no stroke lesion size ≥ 20 mL (sub-cohort A*. AF, the primary endpoint, was detected on 24-hour electrocardiography and/or echocardiography. Involvement of the insula was assessed by two experienced readers on MRI blinded to clinical data. MR-proANP levels were obtained through a novel sandwich immunoassay. Logistic-regression-models were fitted to estimate odds ratios for the association of insular strokes and MR-proANP with NDAF. The discriminatory accuracy of insular strokes and MR-proANP was assessed by a model-wise comparison of the area under the receiver-operating-characteristics-curve (AUC with known predictors of AF. RESULTS: 104 (cohort A and 83 (cohort A* patients fulfilled above-mentioned criteria. Patients with isolated insular strokes had a 10.7-fold higher odds of NDAF than patients with a small ischemic stroke at any other location. The AUC of multivariate logistic regression models for the prediction of NDAF improved significantly when adding stroke location and MR-proANP levels. Moreover, MR-proANP levels remained significantly elevated throughout the acute hospitalization period in patients with NDAF compared to those without. CONCLUSIONS: Isolated insular strokes and plasma MR-proANP levels on admission are independent predictors of NDAF and significantly improve the prediction accuracy of identifying patients with NDAF compared to known predictors including age, the NIHSS and lesion size. To accelerate accurate diagnosis and enhance secondary

  20. Monte Carlo techniques

    International Nuclear Information System (INIS)

    The course of ''Monte Carlo Techniques'' will try to give a general overview of how to build up a method based on a given theory, allowing you to compare the outcome of an experiment with that theory. Concepts related with the construction of the method, such as, random variables, distributions of random variables, generation of random variables, random-based numerical methods, will be introduced in this course. Examples of some of the current theories in High Energy Physics describing the e+e- annihilation processes (QED, Electro-Weak, QCD) will also be briefly introduced. A second step in the employment of this method is related to the detector. The interactions that a particle could have along its way, through the detector as well as the response of the different materials which compound the detector will be quoted in this course. An example of detector at LEP era, in which these techniques are being applied, will close the course. (orig.)

  1. Gastronomía típica Margariteña como atractivo turístico del Municipio Mariño Estado Nueva Esparta

    Directory of Open Access Journals (Sweden)

    Medina, María

    2008-04-01

    Full Text Available The typical margariteñan gastronomy, its elements: restaurants, authors, dishes and promotion as a tourism attraction at the Municipio Mariño is characterized. Recommendations for its improvement are presented. Tourism and gastronomy are the theoretical grounds and its importance for the tourism industry. A descriptive and field methodology was used. Today, there is a lack of information, promo-tion and improvement of the typical margariteñan gastronomy as a tourism attraction at the Municipio Mariño due to the lack of its knowledge in addition to the modification that restaurants of the Municipio are doing with the original recipes, are concluded

  2. MCMini: Monte Carlo on GPGPU

    Energy Technology Data Exchange (ETDEWEB)

    Marcus, Ryan C. [Los Alamos National Laboratory

    2012-07-25

    MCMini is a proof of concept that demonstrates the possibility for Monte Carlo neutron transport using OpenCL with a focus on performance. This implementation, written in C, shows that tracing particles and calculating reactions on a 3D mesh can be done in a highly scalable fashion. These results demonstrate a potential path forward for MCNP or other Monte Carlo codes.

  3. Monte Carlo methods for electromagnetics

    CERN Document Server

    Sadiku, Matthew NO

    2009-01-01

    Until now, novices had to painstakingly dig through the literature to discover how to use Monte Carlo techniques for solving electromagnetic problems. Written by one of the foremost researchers in the field, Monte Carlo Methods for Electromagnetics provides a solid understanding of these methods and their applications in electromagnetic computation. Including much of his own work, the author brings together essential information from several different publications.Using a simple, clear writing style, the author begins with a historical background and review of electromagnetic theory. After addressing probability and statistics, he introduces the finite difference method as well as the fixed and floating random walk Monte Carlo methods. The text then applies the Exodus method to Laplace's and Poisson's equations and presents Monte Carlo techniques for handing Neumann problems. It also deals with whole field computation using the Markov chain, applies Monte Carlo methods to time-varying diffusion problems, and ...

  4. El presupuesto público en la gestión eficiente de los municipios

    Directory of Open Access Journals (Sweden)

    Carlos Arturo Gómez R.

    2004-12-01

    Full Text Available El presente artículo plantea la necesidad de realizar un cambio en el proceso del presupuesto público colombiano, de manera que permita llevar a la práctica los planes de desarrollo elaborados con la participación ciudadana, pasando de un sistema rígido donde se estimula el gasto a un sistema orientado a resultados que tenga en cuenta los objetivos definidos y el impacto social de cada partida asignada. De esta manera, los municipios colombianos, enmarcados en el proceso de descentralización que se ha venido desarrollando en el país, pueden contar con una herramienta de gestión pública que busque la eficiencia y la eficacia, dinamizando el desarrollo social mediante la optimización de costos y gastos, aumentos en la productividad y el mejoramiento de los procesos.

  5. Los Municipios en México: el eslabón de la cadena

    Directory of Open Access Journals (Sweden)

    Mauricio MERINO HUERTA

    2009-11-01

    Full Text Available RESUMEN: Tanto la reforma económica en busca de mayor libertad de mercado como la transición política que aspira a la democracia pueden realizarse a partir de cualquier esquema institucional. Así, en el caso de México, la reforma estatal ha transcurrido por un proceso de (des centralización en el que, sin embargo, los municipios no han participado.ABSTRACT: The author tries to prove that any institucional scheme is useful for the economic reform which persecues the free market and the political transition to democracy. So, in the Mexican case, the state reform has been going through a process of decentralization in which, however, the councils have not participated.

  6. La deuda pública de los municipios aragoneses en los siglos XIV y XV

    Directory of Open Access Journals (Sweden)

    Abella Samitier, Juan

    2009-06-01

    Full Text Available This article aims at studying the origin of public debt in Aragon in the 14th century and its development in the 15th century. Hence, the dire state of municipal finances, the reasons that led city and town councils to run into debt, cuts and rises in interest rates, and some the most important issues of public debt will be fully discussed and analysed.

    El objeto de este artículo es estudiar los orígenes de la deuda pública de los municipios aragoneses en el siglo XIV y su evolución en el siglo XV. En este sentido, se analiza especialmente la cronología de las principales emisiones, los cambios en los tipos de interés y las causas que obligaron a las ciudades y villas del reino a endeudarse.

  7. Effects of insularity on digestion: living on islands induces shifts in physiological and morphological traits in island reptiles

    Science.gov (United States)

    Sagonas, Kostas; Pafilis, Panayiotis; Valakos, Efstratios D.

    2015-10-01

    Living on islands entails numerous challenges for animals, among which resource scarcity stands out. In order to survive, animals have to optimize energy acquisition. We examined the impact of insularity on digestion comparing a series of physiological and morphological traits of adult males between insular and mainland populations of the Balkan green lizard. Island lizards had longer gastrointestinal tracts and gut passage times and higher digestive efficiencies. The dissection of the hindgut revealed an unexpected finding, the presence of cecal valves that were more frequent in island lizards. Thanks to all above islanders retain food for longer periods and thus maximize energy income and increase the amount of the extracted nutrients. That way, they secure energy income from the limited, in time and quantity, food resources of the islands.

  8. Balanced scorecard en las empresas mixtas petroleras del municipio Maracaibo del estado Zulia

    Directory of Open Access Journals (Sweden)

    Alvaro Finali

    2014-01-01

    Full Text Available La presente investigación, tuvo como objetivo identificar las perspectivas basadas en el enfoque del Balanced Scorecard en las empresas mixtas petroleras del municipio Maracaibo del estado Zulia. El sustento teórico utilizado para el estudio, se enmarcó en los aportes realizados por Caycho (2010, Kaplan y Norton, (2004, López (2001, Muñiz y Monfort (2005, Niven (2003, Pérez (2003, Rampersad (2005, Solano et al (2002, entre otros. El presente estudio es de tipo descriptivo, de campo, no experimental, transaccional. La población estuvo conformada en total por cuarenta (40 sujetos entre gerentes y supervisores. Se utilizó como técnica la encuesta, la cual sirvió como mecanismo para evaluar la opinión de la población, a través de un cuestionario estructurado elaborado especialmente para la variable Balanced Scorecard, constituido por cincuenta items, bajo la escala de respuestas tipo Likert, validado por cinco expertos, con un coeficiente Alpha Cronbach que arrojó una confiabilidad de (0,99. Se evidencia cómo en las empresas mixtas petroleras del municipio Maracaibo del estado Zulia, se miden a través de las perspectivas del Balanced Scorecard (BSC algunas veces con el indicador financiera y casi siempre evalúan las del cliente, proceso interno, aprendizaje y crecimiento en la organización, mostrando una tendencia positiva en busca de mejorar su sistema de gestión, para lo cual se recomendó cuidar que todas las perspectivas (financiera, clientes, procesos internos y aprendizaje organizacional, con el fin de que el Sistema Balanceado de Indicadores (SBI produzca la serie de resultados favorables en la administración de la empresas objetos de estudio, ya que para lograrlo es necesario implementar la metodología, monitoreo y análisis constante de los indicadores obtenidos.

  9. ESTUDIO SEROLÓGICO DE BRUCELOSIS CANINA EN DOS ALBERGUES DEL MUNICIPIO DE ENVIGADO, COLOMBIA (2011

    Directory of Open Access Journals (Sweden)

    P. Agudelo

    2014-01-01

    Full Text Available El objetivo de este estudio fue buscar la presencia de anticuerpos de brucelosis en la población de dos albergues caninos del municipio de Envigado (Antioquia, Colombia y a tal fin se seleccionaron 54 perros. Se tomaron muestras sanguíneas en 10 machos y 44 hembras que fueron procesadas bajo la técnica de inmunocromatografía para Brucella canis. No hubo diferencia estadística entre albergues en los parámetros ‘sexo’ y ‘raza’ de cada grupo de estudio y tampoco se encontró evidencia serológica de la presencia de brucelosis canina en el grupo de animales muestreados. Los resultados indican que, aunque los animales permanecieron en calidad de abandono durante un período de su vida, su condición feral no era permanente debido a que en el momento del estudio se encontraban en albergues. Las políticas intensivas de recolección se orientan más a la atención de mascotas abandonadas que a aquellos animales ferales (los cuales, con mayor frecuencia, pueden ser portadores de la enfermedad. El tipo de población in - cluida en el estudio, sumado a la práctica estricta de esterilización inmediata dentro del albergue —que a su vez impide los apareamientos entre individuos—, pueden incidir en la reducción la propagación de la enfermedad en el municipio.

  10. Desarrollo local y políticas rurales en el Municipio del Pilar

    Directory of Open Access Journals (Sweden)

    María Carolina Feito

    2010-07-01

    Full Text Available Analizamos el rol del municipio y las políticas municipales en las problemáticas de los productores hortícolas, considerando que las nuevas funciones de los gobiernos locales implican un nuevo perfil del Estado. En Pilar se reformularon estrategias de intervención en la gestión de los espacios hortícolas. Repasamos ejes del concepto de desarrollo local, el perfil del territorio y el rol de la sociedad civil y desafíos de la gestión municipal, mediante avances de una investigación que aplica metodología cualitativa con trabajo de campo etnográfico en distintos ámbitos municipales del partido. La capacidad de respuesta de las estructuras burocráticas gubernamentales locales es, por el momento, adecuada a las demandas de los productores. Se visualiza cierta coordinación y articulación entre y dentro de los organismos públicos del municipio.We analize the rol of the municipality in the problematics of horticultural productors, considering that the new functions of local governments involves a new profile of the State. InPilar, intervention strategies are reformulated in the management of the horticultural spaces. We will analize axis of the concept of local development, the territorial profile, the rol of civil society and the management of local government. We present advances of an investigation that uses qualitative methodology whit ethnographical fieldwork in several local scopes. The capacity of response of gubernamental burocratic structures is, by now, adequate to the demands of rural productors. We visualize certain coordination and articulation between and inside the public organisms of local government.

  11. La desnaturalización del procedimiento insaculatorio en los municipios aragoneses bajo los Austrias

    Directory of Open Access Journals (Sweden)

    Josep María TORRAS I RIBÉ

    2009-11-01

    Full Text Available RESUMEN: Dentro de las actuaciones políticas emprendidas por Felipe II respecto al reino de Aragón con posterioridad a las "alteraciones" del año 1591, merece especial atención por su trascendencia y por sus consecuencias de largo alcance la persistente intromisión del monarca en los municipios aragoneses. El arranque de estas actuaciones debería fijarse en la elaboración de un minucioso informe jurídico realizado por el Dr. Martín Miravete de Blancas en el año 1596. Según el contenido de este documento se pretendía asegurar el control efectivo por parte de la monarquía de la elección de los oficios municipales de todas las ciudades del reino, por medio de la intervención de comisarios electores regios en la selección de los candidatos. A finales del siglo XVII la imposición de este nuevo sistema electoral se había difundido ya a la mayoría de municipios aragoneses.ABSTRACT: Among the political measures taken by Philip II concerning the kingdom of Aragon after the "upheavals" of 1591, the persistent royal interference in Aragonese town councils deserves special attention because of its importance and its far reaching consequences. The start of these interferences lies in a meticulous juridical report written by Dr. Martin Miravete de Blancas in 1596. Its goal was to give the crown real control on the lottery for municipal offices of all the townships of the kingdom, by means of the intervention of royal elector commissaries in the selection of candidates. By the late Seventeenth century this new electoral procedure had spread to a fair majority of Aragonese town councils.

  12. Building and Applying "Insularity Theory": Review on Knapp's Prehistoric and Protohistoric Cyprus, 2008.

    Science.gov (United States)

    Katsarou-Tzeveleki, Stella

    listing of external factors (colonization, invasions) originating in the Near East and the Aegean as sequential narrative history, and the descriptive, systemic analysis of 'materiality, production, trade, migration and colonization which have for long been the cornerstones of Cypriot archaeology' (p. 11). In contrast, he turns his attention towards the internal processes within the island society of Bronze Age Cyprus, which shape its insularity and give it a distinctive identity at this specific period, processes that lead to contextual history and formative tradition. 'To study how any society changes, at any time, it is crucial first to look at internal rather than external factors' (p. 1). Defining the concept of insularity is his aim; therefore, he begins with a number of very apposite rhetorical questions (p. 13) and identifies several individual parameters (connectivity, islandscape, social identity, ethnicity, migration, acculturation, hybridization) to which he assigns collective and individual meanings. The eight chapters that follow may be assigned, broadly, to three general units: in the first of these (ch. 1-2), Knapp offers a synthesis of these parameters in the form of a 'theory of insularity'. In the second (ch. 3-7) he formulates his revised narrative of the prehistory and social identity of the island, which involves a presentation of social and economic, rather than stylistic categories, on the basis of the parameters laid down in his theoretical scheme. Finally, in the third unit (ch. 8), he records his overall conclusions, the new cognitive experiences and concerns that have emerged from the application of his theory, both to Cyprus and to insular archaeology in the Mediterranean and on a world scale. Knapp's synthesis of the theory of insularity in the first unit is a major contribution to Mediterranean archaeology, and makes this book a seminal work. Continuing and broadening Broodbank's (2000) reasoning about the Cyclades, Knapp, with Cyprus as his

  13. Parallelizing Monte Carlo with PMC

    Energy Technology Data Exchange (ETDEWEB)

    Rathkopf, J.A.; Jones, T.R.; Nessett, D.M.; Stanberry, L.C.

    1994-11-01

    PMC (Parallel Monte Carlo) is a system of generic interface routines that allows easy porting of Monte Carlo packages of large-scale physics simulation codes to Massively Parallel Processor (MPP) computers. By loading various versions of PMC, simulation code developers can configure their codes to run in several modes: serial, Monte Carlo runs on the same processor as the rest of the code; parallel, Monte Carlo runs in parallel across many processors of the MPP with the rest of the code running on other MPP processor(s); distributed, Monte Carlo runs in parallel across many processors of the MPP with the rest of the code running on a different machine. This multi-mode approach allows maintenance of a single simulation code source regardless of the target machine. PMC handles passing of messages between nodes on the MPP, passing of messages between a different machine and the MPP, distributing work between nodes, and providing independent, reproducible sequences of random numbers. Several production codes have been parallelized under the PMC system. Excellent parallel efficiency in both the distributed and parallel modes results if sufficient workload is available per processor. Experiences with a Monte Carlo photonics demonstration code and a Monte Carlo neutronics package are described.

  14. Factores asociados a la hospitalización por procesos sensibles a cuidados ambulatorios en los municipios

    Directory of Open Access Journals (Sweden)

    Márquez-Calderón S.

    2003-01-01

    Full Text Available Objetivos: Describir la variabilidad en las tasas de hospitalización por procesos sensibles a cuidados ambulatorios (PSCA entre municipios del área de referencia de un hospital de tercer nivel, y determinar la influencia de las características de la atención primaria, los factores socioeconómicos, el nivel de salud de la población y la accesibilidad geográfica al hospital. Método: Se realizó un estudio ecológico en 34 municipios del área del Hospital Virgen de las Nieves (Granada, abarcando todas las hospitalizaciones por PSCA de 1997 a 1999. Las tasas de hospitalización se calcularon por separado para varones y mujeres y se estandarizaron por el método indirecto según la edad. Se exploraron como variables independientes las siguientes: características de la atención primaria (tipo de modelo y centro, socioeconómicas (desempleo, renta, comercios, tamaño del municipio, de salud (mortalidad y accesibilidad (crona: minutos desde el municipio al hospital. Se realizó un análisis de regresión lineal múltiple. Resultados: El 9,8% de los ingresos ocurridos en el hospital fueron por PSCA. La tasa media anual fue de 10 ingresos por 1.000 habitantes, siendo superior en varones y en los mayores de 74 años. En el 56% de los municipios las razones de hospitalización estandarizadas no fueron estadísticamente diferentes de 1, en un 26% fueron menores y en un 18%, mayores. Un 62% de la variabilidad en las tasas de los varones se explicó por la crona al hospital, el tamaño del municipio, la interacción entre ambas variables y la mortalidad. Las tasas en mujeres se explicaron en un 18% por la crona y la tasa de desempleo. Conclusiones: La variabilidad de las tasas de hospitalización por PSCA no se asoció a las características de la atención primaria en el ámbito geográfico estudiado. La mayor accesibilidad en tiempo al hospital fue la única variable asociada a mayores tasas en varones y mujeres. Las tasas en mujeres fueron

  15. Household waste compositional analysis variation from insular communities in the framework of waste prevention strategy plans

    Energy Technology Data Exchange (ETDEWEB)

    Zorpas, Antonis A., E-mail: antonis.zorpas@ouc.ac.cy [Cyprus Open University, Faculty of Pure and Applied Science, Environmental Conservation and Management, P.O. Box 12794, 2252 Latsia, Nicosia (Cyprus); Lasaridi, Katia, E-mail: klasaridi@hua.gr [Harokopio University, Department of Geography, 70 El. Venizelou, 176 71 Athens, Kallithea (Greece); Voukkali, Irene [Institute of Environmental Technology and Sustainable Development, ENVITECH LTD, Department of Research and Development, P.O. Box 34073, 5309 (Cyprus); Loizia, Pantelitsa, E-mail: irenevoukkali@envitech.org [Institute of Environmental Technology and Sustainable Development, ENVITECH LTD, Department of Research and Development, P.O. Box 34073, 5309 (Cyprus); Chroni, Christina [Harokopio University, Department of Geography, 70 El. Venizelou, 176 71 Athens, Kallithea (Greece)

    2015-04-15

    Highlights: • Waste framework directive has set clear waste prevention procedures. • Household Compositional analysis. • Waste management plans. • Zero waste approach. • Waste generation. - Abstract: Waste management planning requires reliable data regarding waste generation, affecting factors on waste generation and forecasts of waste quantities based on facts. In order to decrease the environmental impacts of waste management the choice of prevention plan as well as the treatment method must be based on the features of the waste that are produced in a specific area. Factors such as culture, economic development, climate, and energy sources have an impact on waste composition; composition influences the need of collecting waste more or less frequently of waste collection and disposition. The research question was to discover the main barriers concerning the compositional analysis in Insular Communities under warm climate conditions and the findings from this study enabled the main contents of a waste management plan to be established. These included advice to residents on waste minimisation, liaison with stakeholders and the expansion of kerbside recycling schemes.

  16. Cortex Insular y su rol putativo en la configuración de trastornos Alimenticios

    Directory of Open Access Journals (Sweden)

    Noemí Sanagua

    2007-07-01

    Full Text Available El estudio neurocientífico de los desordenes alimenticios, ha experimentado importantes avances en la ultima década, posibilitando dilucidar sustratos cerebrales asociados a la configuración de diversas patologías. El lóbulo insular ha sido escasamente estudiado, trabajos de neuroimagen recientes han permitido conocer su representación anatómica, citoarquitectónica y funcional, así como su conexión con el sistema límbico y neocortex. Su activación, ha sido implicada en diversos procesos: sensomotores viscerales, somatosensoriales (incluyendo el dolor, motores, volitivos, gustativos, auditivos, vestibulares, emocionales y funciones cognitivas como el lenguaje (Ackermann, H.; Riecker, A; 2004. El presente artículo, tiene por objetivo analizar los correlatos neurofisiológicos asociados a desordenes alimenticios (obesidad, anorexia y bulimia. Sugiriendo una activación tónica diferencial en ínsula, que permitiría explicar la experiencia de saciedad y valoración afectiva a estímulos apetitivos, alterada en desordenes alimenticios.

  17. Anthropogenic and Climatic Influence on Vegetation Fires in Peatland of Insular Southeast Asia

    Science.gov (United States)

    Liew, S.; Miettinen, J.; Salinas Cortijo, S. V.

    2011-12-01

    Fire is traditionally used as a tool in land clearing by farmers and shifting cultivators in Southeast Asia. However, the small scale clearing of land is increasingly being replaced by modern large-scale conversion of forests into plantations/agricultural land, usually also by fires. Fires get out of control in periods of extreme drought, especially during the El Nino periods, resulting in severe episodes of transboundary air pollution in the form of smoke haze. We use the MODIS active fires product (hotspots) to establish correlations between the temporal and spatial patterns of vegetation fires with climatic variables, land cover change and soil type (peat or non-peat) in the western part of Insular Southeast Asia for a decade from 2001 to 2010. Fire occurrence exhibits a negative correlation with rainfall, and is more severe overall during the El-Nino periods. However, not all regions are equally affected by El-Nino. In Southern Sumatra and Southern Borneo the correlation with El-Nino is high. However, fires in some regions such as the peatland in Riau, Jambi and Sarawak do not appear to be influenced by El-Nino. These regions are also experiencing rapid conversion of forest to large scale plantations.

  18. Genetic structure in insular and mainland populations of house sparrows (Passer domesticus) and their hemosporidian parasites

    Science.gov (United States)

    Bichet, Coraline; Moodley, Yoshan; Penn, Dustin J; Sorci, Gabriele; Garnier, Stéphane

    2015-01-01

    Small and isolated populations usually exhibit low levels of genetic variability, and thus, they are expected to have a lower capacity to adapt to changes in environmental conditions, such as exposure to pathogens and parasites. Comparing the genetic variability of selectively neutral versus functional loci allows one to assess the evolutionary history of populations and their future evolutionary potential. The genes of the major histocompatibility complex (MHC) control immune recognition of parasites, and their unusually high diversity is genes which is likely driven by parasite-mediated balancing selection. Here, we examined diversity and differentiation of neutral microsatellite loci and functional MHC class I genes in house sparrows (Passer domesticus), living in six insular and six mainland populations, and we aimed to determine whether their diversity or differentiation correlates with the diversity and the prevalence of infection of hemosporidian parasites. We found that island bird populations tended to have lower neutral genetic variability, whereas MHC variability gene was similar between island and mainland populations. Similarly, island populations tended to show greater genetic differentiation than mainland populations, especially at microsatellite markers. The maintenance of MHC genetic diversity and its less marked structure in the island populations could be attributed to balancing-selection. The greater MHC differentiation among populations was negatively correlated with similarity in blood parasites (prevalence and diversity of parasite strains) between populations. Even at low prevalence and small geographical scale, haemosporidian parasites might contribute to structure the variability of immune genes among populations of hosts. PMID:25937907

  19. Household waste compositional analysis variation from insular communities in the framework of waste prevention strategy plans

    International Nuclear Information System (INIS)

    Highlights: • Waste framework directive has set clear waste prevention procedures. • Household Compositional analysis. • Waste management plans. • Zero waste approach. • Waste generation. - Abstract: Waste management planning requires reliable data regarding waste generation, affecting factors on waste generation and forecasts of waste quantities based on facts. In order to decrease the environmental impacts of waste management the choice of prevention plan as well as the treatment method must be based on the features of the waste that are produced in a specific area. Factors such as culture, economic development, climate, and energy sources have an impact on waste composition; composition influences the need of collecting waste more or less frequently of waste collection and disposition. The research question was to discover the main barriers concerning the compositional analysis in Insular Communities under warm climate conditions and the findings from this study enabled the main contents of a waste management plan to be established. These included advice to residents on waste minimisation, liaison with stakeholders and the expansion of kerbside recycling schemes

  20. Taste intensity modulates effective connectivity from the insular cortex to the thalamus in humans.

    Science.gov (United States)

    Yeung, Andy Wai Kan; Tanabe, Hiroki C; Suen, Justin Long Kiu; Goto, Tazuko K

    2016-07-15

    Evaluation of taste intensity is one of the most important perceptual abilities in our daily life. In contrast with extensive research findings regarding the spatial representation of taste in the insula and thalamus, little is known about how the thalamus and insula communicate and reciprocally influence their activities for processing taste intensity. To examine this neurophysiological relationship, we investigated the modulatory effect of intensity of saltiness on connections in the network processing taste signals in the human brain. These "effective connectivity" relationships refer to the neurophysiological influence (including direction and strength of influence) of one brain region on another. Healthy adults (N=34), including 17 males and 17 females (mean age=21.3years, SD=2.4; mean body mass index (BMI)=20.2kg/m(2), SD=2.1) underwent functional magnetic resonance imaging as they tasted three concentrations of sodium chloride solutions. By effective connectivity analysis with dynamic causal modeling, we show that taste intensity enhances top-down signal transmission from the insular cortex to the thalamus. These results are the first to demonstrate the modulatory effect of taste intensity on the taste network in the human brain. PMID:27132544

  1. Crocidura populations (Mammalia, Soricidae from the Sicilian-Maltese insular area

    Directory of Open Access Journals (Sweden)

    Maurizio Sarà

    1996-12-01

    Full Text Available Abstract Recent studies have shown the presence of a new endemic species of Soricidae, Crocidura sicula, in the Mediterranean area. Its karyotype consists of 36 chromosomes (NF = 56, NFa = 52 as previously recorded in specimens from Sicily and Gozo (Malta. Karyological analysis carried out in the present study on specimens from Marettimo (Egadi and Ustica and on two additional Sicilian localities proved the presence of the same C. sicula karyotype. The multivariate analysis of skull and mandible of these populations revealed a pattern of geographic variation which is mainly related to a size decrease (76% of the total variability accounted for in shrews living in the small islands around Sicily. The body biometrics of these insular shrews follows this trend, with some exceptions such as in Ustica, where shrews are relatively bigger. The shrews from Ustica show also melanic fur, which is darker than the grey-witheish colour found in conspecific populations. Such a phenotype could be the result of adaptation to the volcanic environment on this island. This latter population is, of all the small islands, the most divergent and differentiated from the mother-island; if considering its skull morphometrics (i.e. the residual 24% of total variability and its body biometrics.

  2. Palaeoenvironments of insular Southeast Asia during the Last Glacial Period: a savanna corridor in Sundaland?

    Science.gov (United States)

    Bird, Michael I.; Taylor, David; Hunt, Chris

    2005-11-01

    Consideration of a range of evidence from geomorphology, palynology, biogeography and vegetation/climate modelling suggests that a north-south 'savanna corridor' did exist through the continent of Sundaland (modern insular Indonesia and Malaysia) through the Last Glacial Period (LGP) at times of lowered sea-level, as originally proposed by Heaney [1991. Climatic Change 19, 53-61]. A minimal interpretation of the size of this corridor requires a narrow but continuous zone of open 'savanna' vegetation 50-150 km wide, running along the sand-covered divide between the modern South China and Java Seas. This area formed a land bridge between the Malaysian Peninsula and the major islands of Sumatra, Java and Borneo. The savanna corridor connected similar open vegetation types north and south of the equator, and served as a barrier to the dispersal of rainforest-dependent species between Sumatra and Borneo. A maximal interpretation of the available evidence is compatible with the existence of a broad savanna corridor, with forest restricted to refugia primarily in Sumatra, Borneo and the continental shelf beneath the modern South China Sea. This savanna corridor may have provided a convenient route for the rapid early dispersal of modern humans through the region and on into Australasia.

  3. Insular activation during reward anticipation reflects duration of illness in abstinent pathological gamblers

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    Kosuke eTsurumi

    2014-09-01

    Full Text Available Pathological gambling (PG is a chronic mental disorder characterized by a difficulty restraining gambling behavior despite negative consequences. Although brain abnormalities in patients with substance use disorders are caused by repetitive drug use and recover partly with drug abstinence, the relationship between brain activity and duration of illness or abstinence of gambling behavior in PG patients remains unclear. Here, using functional magnetic resonance imaging, we compared the brain activity of 23 PG patients recruited from a treatment facility with 27 demographically-matched healthy control subjects during reward anticipation, and examined the correlations between brain activity and duration of illness or abstinence in PG patients. During reward anticipation, PG patients showed decreased activity compared to healthy controls in a broad range of the reward system regions, including the insula cortex. In PG patients, activation in the left insula showed a significant negative correlation with illness duration. Our findings suggest that insular activation during reward anticipation may serve as a marker of progression of pathological gambling.

  4. The avian fossil record in Insular Southeast Asia and its implications for avian biogeography and palaeoecology

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    Hanneke J.M. Meijer

    2014-03-01

    Full Text Available Excavations and studies of existing collections during the last decades have significantly increased the abundance as well as the diversity of the avian fossil record for Insular Southeast Asia. The avian fossil record covers the Eocene through the Holocene, with the majority of bird fossils Pleistocene in age. Fossil bird skeletal remains represent at least 63 species in 54 genera and 27 families, and two ichnospecies are represented by fossil footprints. Birds of prey, owls and swiftlets are common elements. Extinctions seem to have been few, suggesting continuity of avian lineages since at least the Late Pleistocene, although some shifts in species ranges have occurred in response to climatic change. Similarities between the Late Pleistocene avifaunas of Flores and Java suggest a dispersal route across southern Sundaland. Late Pleistocene assemblages of Niah Cave (Borneo and Liang Bua (Flores support the rainforest refugium hypothesis in Southeast Asia as they indicate the persistence of forest cover, at least locally, throughout the Late Pleistocene and Holocene.

  5. How large are the extinct giant insular rodents? New body mass estimations from teeth and bones.

    Science.gov (United States)

    Moncunill-Solé, Blanca; Jordana, Xavier; Marín-Moratalla, Nekane; Moyà-Solà, Salvador; Köhler, Meike

    2014-03-01

    The island rule entails a modification of the body size of insular mammals, a character related with numerous biological and ecological variables. From the Miocene to human colonization (Holocene), Mediterranean and Canary Islands were unaltered natural ecosystems, with paleofaunas formed with endemic giant rodents among other mammals. Our aim is to create methods to estimate the body masses of fossil island rodents and address the nature of ecological pressures driving the island rule. We created regression equations based on extant rodent data and used these to estimate the body masses of the extinct species. Our results show strong correlations between teeth, cranial and postcranial measurements and body mass, except for the length of the long bones, the transversal diameter of the distal tibia and the anteroposterior diameter of the proximal tibia, where the equations were less reliable. The use of equations obtained from a more homogeneous group (suborder and family) is preferable when analyzing the area of the first molar. The new regressions were applied to estimate the body masses of some Mediterranean and Canarian fossil rodents (Canariomys, C. bravoi 1.5 kg and C. tamarani 1 kg; Hypnomys, H. morpheus 230 g and H. onicensis 200 g; and Muscardinus cyclopeus 100 g). Our results indicate that under absence of predation, resource availability (island area) is the key factor that determines the size of the Canariomys sp. However, under presence of specialized predators (birds of prey), body size evolution is less pronounced (Hypnomys sp.). PMID:24673763

  6. Gene flow between insular, coastal and interior populations of brown bears in Alaska.

    Science.gov (United States)

    Paetkau, D; Shields, G F; Strobeck, C

    1998-10-01

    The brown bears of coastal Alaska have been recently regarded as comprising from one to three distinct genetic groups. We sampled brown bears from each of the regions for which hypotheses of genetic uniqueness have been made, including the bears of the Kodiak Archipelago and the bears of Admiralty, Baranof and Chichagof (ABC) Islands in southeast Alaska. These samples were analysed with a suite of nuclear microsatellite markers. The 'big brown bears' of coastal Alaska were found to be part of the continuous continental distribution of brown bears, and not genetically isolated from the physically smaller 'grizzly bears' of the interior. By contrast, Kodiak brown bears appear to have experienced little or no genetic exchange with continental populations in recent generations. The bears of the ABC Islands, which have previously been shown to undergo little or no female-mediated gene flow with mainland populations, were found not to be genetically isolated from mainland bears. The data from the four insular populations indicate that female and male dispersal can be reduced or eliminated by water barriers of 2-4 km and 7 km in width, respectively.

  7. TARC: Carlo Rubbia's Energy Amplifier

    CERN Multimedia

    Laurent Guiraud

    1997-01-01

    Transmutation by Adiabatic Resonance Crossing (TARC) is Carlo Rubbia's energy amplifier. This CERN experiment demonstrated that long-lived fission fragments, such as 99-TC, can be efficiently destroyed.

  8. El gobierno al interior del municipio mexicano: reflexiones en torno a su diseño institucional

    Directory of Open Access Journals (Sweden)

    Alberto Arellano Ríos

    2011-01-01

    Full Text Available En este artículo se reflexiona, debate y discute el diseño interno del gobierno municipal en México. Para ello se problematizan y contextualizan los alcances y limitaciones del diseño institucional del municipio mexicano, terminada la primera década del siglo xxi. Después se analizan algunos casos de municipios mexicanos e internacionales en los que se descentralizan y desconcentran decisiones, y se fomenta la participación y deliberación en temas de gobierno y asuntos públicos locales. Así se esboza el funcionamiento de las juntas municipales, los distritos municipales, el presupuesto participativo y las juntas de administración local, con objetivo de poner en la mesa de discusión la necesidad de crear, analizar o diseñar mecanismos intramunicipales de gobierno local.

  9. Finanzas públicas y desigualdad fiscal en los municipios de Boyacá, 1985-2010

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    Plinio Atanael Guerrero Guerrero

    2014-06-01

    Full Text Available La desigualdad de los ingresos fiscales per cápita de los municipios y provincias del departamento de Boyacá y su evolución, es analizada utilizando tres indicadores (Gini, Theil y coeficiente sigma, para acercarse a la explicación de la contribución del proceso de descentralización fiscal en la reducción de las disparidades intermunicipales y provinciales. De los resultados obtenidos, se deduce que en materia fiscal hay un proceso de convergencia, además, al contrastarlos con indicadores como el NBI, el porcentaje de población en situación de pobreza y el Gini de gastos por municipio, en 1993 y 2005, estos últimos presentan disminuciones importantes que en cierta forma corroboran la mejora en los indicadores de equidad.

  10. Una propuesta para desarrollar turismo rural en los municipios de Zacatecas, México: las rutas agro-culturales

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    María Eugenia González-Ávila

    2011-01-01

    Full Text Available El trabajo evaluó el potencial de los municipios de Zacatecas para desarrollar turismo de Rutas Agro-Culturales (RAC en base a una serie de recursos mediante el Índice del Evaluación de Rutas Agro-Culturales (IERAC; dando por resultado la Ruta del chile (R1; Ruta del maíz (R2; Ruta ganadera (R3; Ruta láctea (R4 y Ruta frutal (R5, donde los municipios con mayor potencial para éste tipo de turismo son: Zacatecas, Fresnillo, Jerez y Sombrerete mientras que en el caso contrario están de Pinos, Moyahua y Concepción del Oro. Así, ésta propuesta permite evaluar el potencial de un sitio para desarrollar turismo RAC en base a una serie de recursos y puede ser aplicado en diferentes regiones de México u otros países.

  11. Condiciones higiénico-sanitarias de comedores escolares del municipio de Oviedo

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    Arias Díaz Cristina

    1998-01-01

    Full Text Available FUNDAMENTO: Conocer las condiciones higiénico-sanitarias en las que se encuentran los comedores escolares del municipio de Oviedo, mediante la realización de una inspección higiénico-sanitaria en estas instalaciones. MÉTODO: Se ha realizado un estudio epidemiológico descriptivo transversal en 24 colegios del municipio de Oviedo, 9 concertados y 15 públicos, según información procedente del Ministerio de Educación y Ciencia (MEC. Se ha llevado a cabo una inspección con un protocolo basado en la Reglamentación Técnico-Sanitaria de Comedores Colectivos. Las variables son las condiciones higiénico-sanitarias de los locales (cocinas, comedores y servicios higiénicos, del utillaje, condiciones del personal y de las materias primas y alimentos. Se han considerado condiciones inadecuadas o deficiencias cuando no se cumplen los criterios del protocolo. RESULTADOS: Las deficiencias encontradas en la mayoría de los comedores escolares inspeccionados han sido la falta de protección en los elementos de iluminación, de malla antiinsectos en ventanas y lavamanos de accionamiento no manual, toallas de papel de un solo uso y jabón líquido tanto en cocinas como en servicios higiénicos. Se han comparado estadísticamente las variables del estudio entre colegios públicos y concertados, para ello se ha realizado un Test de T de Student obteniéndose diferencias significativas, entre ambos tipos de colegios, solo en el estado de las cocinas y en el total de los ítems. CONCLUSIONES: La mayoría de las anomalías encontradas, tanto en colegios públicos como en concertados, son de carácter estructural y de las instalaciones, originadas por el desconocimiento de la legislación vigente. Se cree conveniente impartir formación en Educación Sanitaria, dada la actitud positiva mostrada por los responsables de los centros educativos.

  12. The problem of the use the hybrid and photovoltaic systems in insular zones with climatic siversity in Madeira; A problematica da utilizacao de sistemas fotovoltaicos e hibridos em zonas insulares de diversidade climatica-ILHA da Madeira

    Energy Technology Data Exchange (ETDEWEB)

    Magro, J. C. E.

    2004-07-01

    Project PAUER contemplates the evaluation and utilization of renewable energy in insular zones with climatic diversity, situated on the Archipelago of Madeira. The project has three main areas of intervention: prospecting and evaluating energetic resources; creation of data bases of climatic data for application in energetic studies and other areas; the installation of twenty autonomous photovoltaic or hybrid systems in isolated localities. This communication presents some data from meteorological observations made up until the present date, following appropriate statistical analysis. Characteristics of some installed photovoltaic and hybrid systems as well as some of the principal problems encountered in the field are also given. (Author)

  13. Mindfulness training modulates value signals in ventromedial prefrontal cortex through input from insular cortex.

    Science.gov (United States)

    Kirk, Ulrich; Gu, Xiaosi; Harvey, Ann H; Fonagy, Peter; Montague, P Read

    2014-10-15

    Neuroimaging research has demonstrated that ventromedial prefrontal cortex (vmPFC) encodes value signals that can be modulated by top-down cognitive input such as semantic knowledge, price incentives, and monetary favors suggesting that such biases may have an identified biological basis. It has been hypothesized that mindfulness training (MT) provides one path for gaining control over such top-down influences; yet, there have been no direct tests of this hypothesis. Here, we probe the behavioral and neural effects of MT on value signals in vmPFC in a randomized longitudinal design of 8 weeks of MT on an initially naïve subject cohort. The impact of this within-subject training was assessed using two paradigms: one that employed primary rewards (fruit juice) in a simple conditioning task and another that used a well-validated art-viewing paradigm to test bias of monetary favors on preference. We show that MT behaviorally censors the top-down bias of monetary favors through a measurable influence on value signals in vmPFC. MT also modulates value signals in vmPFC to primary reward delivery. Using a separate cohort of subjects we show that 8 weeks of active control training (ACT) generates the same behavioral impact also through an effect on signals in the vmPFC. Importantly, functional connectivity analyses show that value signals in vmPFC are coupled with bilateral posterior insula in the MT groups in both paradigms, but not in the ACT groups. These results suggest that MT integrates interoceptive input from insular cortex in the context of value computations of both primary and secondary rewards.

  14. Involvement of the insular cortex in regulating glucocorticoid effects on memory consolidation of inhibitory avoidance training

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    Raquel eFornari

    2012-03-01

    Full Text Available Glucocorticoids are known to enhance the consolidation of memory of emotionally arousing experiences by acting upon a network of interconnected brain regions. Although animal studies typically do not consider the insular cortex (IC to be part of this network, the present findings indicate that the IC is importantly involved in regulating glucocorticoid effects on memory consolidation of emotionally arousing inhibitory avoidance training. The specific glucocorticoid receptor agonist RU 28362 (3 or 10 ng in 0.5 l infused bilaterally into the IC of male Sprague-Dawley rats immediately after one-trial inhibitory avoidance training dose-dependently enhanced 48-h retention performance. Moreover, training on the inhibitory avoidance task increased neuronal activity of the IC, as assessed by an increased number of cells expressing immunoreactivity for phosphorylated extracellular signal-regulated kinase 1/2 (pERK1/2. However, systemic administration of a memory-enhancing dose of corticosterone (1 mg/kg after inhibitory avoidance training rapidly reduced the number of pERK1/2-positive cells in the IC, suggesting that glucocorticoid administration reduces overall neuronal activity of the IC. To investigate which components of the inhibitory avoidance training experience were influenced by the intra-IC glucocorticoid administration, in the last experiment rats were trained on a modified inhibitory avoidance task in which context exposure and footshock training occur on two sequential days. RU 28362 administration into the IC enhanced later retention when infused immediately after either the context or footshock training. Thus, these findings indicate that the IC mediates glucocorticoid effects on the consolidation of memory of different components of inhibitory avoidance training and suggest that the IC might be an important element of the rodent brain network involved in emotional regulation of learning and memory.

  15. Aerosol optical, microphysical and radiative properties at regional background insular sites in the western Mediterranean

    Science.gov (United States)

    Sicard, Michaël; Barragan, Rubén; Dulac, François; Alados-Arboledas, Lucas; Mallet, Marc

    2016-09-01

    In the framework of the ChArMEx (the Chemistry-Aerosol Mediterranean Experiment; http://charmex.lsce.ipsl.fr/) program, the seasonal variability of the aerosol optical, microphysical and radiative properties derived from AERONET (Aerosol Robotic Network; http://aeronet.gsfc.nasa.gov/) is examined in two regional background insular sites in the western Mediterranean Basin: Ersa (Corsica Island, France) and Palma de Mallorca (Mallorca Island, Spain). A third site, Alborán (Alborán Island, Spain), with only a few months of data is considered for examining possible northeast-southwest (NE-SW) gradients of the aforementioned aerosol properties. The AERONET dataset is exclusively composed of level 2.0 inversion products available during the 5-year period 2011-2015. AERONET solar radiative fluxes are compared with ground- and satellite-based flux measurements. To the best of our knowledge this is the first time that AERONET fluxes are compared with measurements at the top of the atmosphere. Strong events (with an aerosol optical depth at 440 nm greater than 0.4) of long-range transport aerosols, one of the main drivers of the observed annual cycles and NE-SW gradients, are (1) mineral dust outbreaks predominant in spring and summer in the north and in summer in the south and (2) European pollution episodes predominant in autumn. A NE-SW gradient exists in the western Mediterranean Basin for the aerosol optical depth and especially its coarse-mode fraction, which all together produces a similar gradient for the aerosol direct radiative forcing. The aerosol fine mode is rather homogeneously distributed. Absorption properties are quite variable because of the many and different sources of anthropogenic particles in and around the western Mediterranean Basin: North African and European urban areas, the Iberian and Italian peninsulas, most forest fires and ship emissions. As a result, the aerosol direct forcing efficiency, more dependent to absorption than the absolute

  16. La gobernabilidad metropolitana de Santiago: la dispar relación de poder de los municipios

    Directory of Open Access Journals (Sweden)

    ARTURO ORELLANA

    2009-04-01

    Full Text Available En ausencia de un gobierno metropolitano, las grandes ciudades que sostienen la problemática de una gestión multinivel, es decir, donde se sobrepone la acción del gobierno central, regional y de un conjunto significativo de municipios, generan un escenario complejo para la gobernabilidad en pro de un desarrollo urbano y territorial equilibrado. Desde esta perspectiva, la gran disparidad en la configuración socioterritorial que muestra el Área Metropolitana de Santiago constituye un reflejo de la estructura de poder sobre el espacio metropolitano, donde las comunas del cono oriente muestran un mejor posicionamiento para orientar las acciones públicas y privadas a favor del interés público de su población residenteIn the absence of metropolitan level government, large cities retain the problems associated with multilevel management whereby the activities of central government, regional government and numerous municipal governments overlap, generating in turn a complex scenario for governance in favour of balanced urban and regional development. From this perspective, the significant disparity in socio-spatial configuration within the Santiago Metropolitan Area reflects the structure of power within this metropolitan space, whereby municipalities in the eastern cone are better able to shape public and private actions in support of the public interests of their resident populations.

  17. Calidad del servicio público de aseo urbano. Caso: Municipio Maracaibo

    Directory of Open Access Journals (Sweden)

    Alejandrina Sáez

    2011-01-01

    Full Text Available En Venezuela el aseo urbano es considerado un servicio básico, cuya responsabilidad recae sobre los gobiernos locales. En tal sentido por ser catalogado básico, las fallas en la prestación del servicio genera manifestaciones de malestar de la población, como es el caso de la ciudad de Maracaibo, comportamiento que ha experimentado un auge, tanto por las graves consecuencias en la salubridad, como la incomodidad estética y el impacto ambiental ocasionados. Esto ha hecho pertinente, determinar la calidad del servicio público de aseo urbano domiciliario en el municipio Maracaibo, parroquias Francisco Eugenio Bustamante y Antonio Borjas Romero, constituyendo el objetivo principal del presente artículo. El diseño de investigación fue no experimental de campo, con un tipo de estudio descriptivo, para lo cual se elaboró y aplicó un instrumento de medición de la calidad con base en la percepción del usuario, siguiendo un muestreo por etapas. Finalmente, se obtuvo una medición de la calidad de servicio valorada en 2.228, en una escala de 1.0 a 5.0, siendo 5.0 la máxima puntuación. En consecuencia se concluye que el nivel de calidad de servicio en las parroquias estudiadas es bajo.

  18. Comportamiento de las firmas de contadores públicos en el municipio Maracaibo

    Directory of Open Access Journals (Sweden)

    Oda H. Gómez-de Angulo

    2005-01-01

    Full Text Available El presente artículo tiene como objetivo analizar el comportamiento de las firmas de contadores públicos del municipio Maracaibo, estado Zulia-Venezuela, con el propósito de dar aportes para mejorar la formación académica del contador público. El estudio es de tipo descriptivo, de campo, no experimental, se aplicó una encuesta a veinticuatro (24 firmas que visan sus estados financieros en el Colegio de Contadores Públicos del Estado Zulia, seleccionadas aleatoriamente. Los resultados obtenidos muestran un estancamiento en el crecimiento de las firmas de contadores públicos de la región y diversificación de los servicios ofrecidos como respuesta a las actuales exigencias del mercado. Se concluye que la contaduría se encuentra en un proceso de transformación, donde se exige mayor responsabilidad en la ejecución del trabajo, siendo necesario adaptar los programas académicos a las nuevas necesidades del ámbito laboral.

  19. VARIABILIDAD CLIMÁTICA Y MALARIA ESTUDIO REGIONAL: MUNICIPIO SIFONTES, ESTADO BOLÍVAR, VENEZUELA

    Directory of Open Access Journals (Sweden)

    Vidal Sáez-Sáez

    2009-01-01

    Full Text Available Se realiza un análisis comparativo de la incidencia mensual de malaria con los índices de oscilación del sur (IOS, en el sureste de Venezuela, en el municipio Sifontes del estado Bolívar, durante el período 1995-2006. Se emplearon los registros mensuales del IOS (caracteriza El Niño/Oscilación del Sur: ENOS e incidencia de casos de malaria para el área de estudio, luego se compararon a partir de representaciones graficas. Los registros IOS fueron categorizados según su intensidad siguiendo la clasificación de Cárdenas (2003 (0,64 neutro a >1,5 fuerte. Se realizaron análisis de correlación simple entre las series hasta con 12 rezagos o desplazamientos temporales y se evidencian que los primeros rezagos son los más significativos; finalmente, los resultados de autocorrelación señalan una mayor dependencia de la serie de la incidencia de malaria (26 períodos y análisis de correlación cruzada sugieren que la periodicidad de las series es de 10 meses. Se concluye que las intensidades neutras a moderadas del IOS tienen un efecto (tiempo de respuesta de 4 a 10 meses sobre la incidencia de malaria en el área de estudio.

  20. Desempeño gerencial en las instituciones de la AVEC del Municipio Boconó

    Directory of Open Access Journals (Sweden)

    Gudiño, Maira

    2010-01-01

    Full Text Available El objetivo de la presente investigación fue evaluar el desempeño gerencial educativo en las instituciones católicas bajo la coordinación de AVEC (Asociación Venezolana de Escuelas Católicas del municipio Boconó del estado Trujillo. La fundamentación teórica estuvo basada en Drucker (1999, Rodríguez (2001, Ander Egg (2008, entre otros. El estudio se realizó bajo un tipo de investigación evaluativa con un diseño no experimental transaccional, para el cual se tomó la población total como muestra por ser finita conformada por dieciocho (18 directivos de gerencia alta y media de las diferentes instituciones de AVEC, aplicando un cuestionario validado de varias alternativas con un grado de confiabilidad de 0,75. Se concluyó que los gerentes de AVEC planifican de acuerdo a los lineamientos emanados por la organización a nivel nacional y desde el punto de vista gerencial se puede resaltar que trabajan en equipo, existe sinergia y el manejo de personal se lleva a cabo a través de una comunicación participativa. Sin embargo, el personal docente se encuentra con pocas oportunidades para innovar.

  1. Ordenación territorial del Municipio de Tandil, Argentina: Estrategia para la sustentabilidad ambiental

    Directory of Open Access Journals (Sweden)

    Cecilia Erbiti

    2015-04-01

    Full Text Available En el contexto de los postulados conceptuales y metodológicos de la planificación estratégica y de sustentabilidad ambiental, el objetivo de esta investigación es describir el proceso de formulación del Plan de Ordenamiento Territorial del Municipio de Tandil (POTM y analizar su potencialidad para avanzar hacia la sustentabilidad ambiental del sistema. Los resultados de la misma muestran que el POTM no sólo prioriza principios, objetivos y estrategias que materializan las diferentes manifestaciones de la sustentabilidad (económica, social, ecológica y política, sino que la totalidad del Plan se fundamenta en el concepto de desarrollo sostenible y, con ello, se establecen prioridades de actuación que posibilitarán la gestión ambiental urbana. Si bien el POTM muestra una gran potencialidad para avanzar hacia la sustentabilidad del territorio, la implementación y cumplimiento del mismo constituye un fuerte desafío para las autoridades de aplicación.

  2. Modulation of functionally localized right insular cortex activity using real-time fMRI-based neurofeedback

    Directory of Open Access Journals (Sweden)

    Brian D Berman

    2013-10-01

    Full Text Available The capacity for subjects to learn to volitionally control localized brain activity using neurofeedback is actively being investigated. We aimed to investigate the ability of healthy volunteers to quickly learn to use visual feedback during real-time functional MRI (rtfMRI to modulate brain activity within their anterior right insular cortex (RIC localized during a blink suppression task, an approach of possible interest in the use of rtfMRI to reduce urges. The RIC region of interest (RIC-ROI was functionally localized using a blink suppression task, and BOLD signal changes within RIC-ROI used to create a constantly updating display fed back to the subject in the scanner. Subjects were instructed to use emotional imagery to try and increase activity within RIC-ROI during four feedback training runs (FB1–FB4. A ‘control’ run (CNTRL before training and a ‘transfer’ run (XSFR after training were performed without feedback to assess for baseline abilities and learning effects. Fourteen participants completed all neurofeedback training runs. At the group level, increased BOLD activity was seen in the anterior RIC during all the FB runs, but a significant increase in the functionally defined RIC-ROI was only attained during FB2. In atlas-defined insular cortex ROIs, significant increases were seen bilaterally during the CNTRL, FB1, FB2, and FB4 runs. Increased activity within the insular cortices did not show lateralization. Training did, however, result in a significant increase in functional connectivity between the RIC-ROI and the medial frontal gyrus when comparing FB4 to FB1. Since neurofeedback training did not lead to an increase in BOLD signal across all feedback runs, we suggest that learning to control one’s brain activity in this fashion may require longer or repeated rtfMRI training sessions.

  3. Learning Touch Preferences with a Tactile Robot Using Dopamine Modulated STDP in a Model of Insular Cortex

    Directory of Open Access Journals (Sweden)

    Ting-Shuo eChou

    2015-07-01

    Full Text Available Neurorobots enable researchers to study how behaviors are produced by neural mechanisms in an uncertain, noisy, real-world environment. To investigate how the somatosensory system processes noisy, real-world touch inputs, we introduce a neurorobot called CARL-SJR, which has a full-body tactile sensory area. The design of CARL-SJR is such that it encourages people to communicate with it through gentle touch. CARL-SJR provides feedback to users by displaying bright colors on its surface. In the present study, we show that CARL-SJR is capable of learning associations between conditioned stimuli (CS; a color pattern on its surface and unconditioned stimuli (US; a preferred touch pattern by applying a spiking neural network (SNN with neurobiologically inspired plasticity. Specifically, we modeled the primary somatosensory cortex, prefrontal cortex, striatum, and the insular cortex, which is important for hedonic touch, to process noisy data generated directly from CARL-SJR’s tactile sensory area. To facilitate learning, we applied dopamine-modulated Spike Timing Dependent Plasticity (STDP to our simulated prefrontal cortex, striatum and insular cortex. To cope with noisy, varying inputs, the SNN was tuned to produce traveling waves of activity that carried spatiotemporal information. Despite the noisy tactile sensors, spike trains, and variations in subject hand swipes, the learning was quite robust. Further, the plasticity (i.e., STDP in primary somatosensory cortex and insular cortex in the incremental pathway of dopaminergic reward system allowed us to control CARL-SJR’s preference for touch direction without heavily pre-processed inputs. The emerged behaviors we found in this model match animal’s behaviors wherein they prefer touch in particular areas and directions. Thus, the results in this paper could serve as an explanation on the underlying neural mechanisms for developing tactile preferences and hedonic touch.

  4. Estrategia de intervención para el cuidado de los-as adolescentes en salud sexual y reproductiva. Policlínico “DR. Carlos J. Finlay”. Marianao, 2009.

    OpenAIRE

    Fajardo Villarroel, Aurora

    2011-01-01

    Se realizó un estudio descriptivo de corte transversal con el objetivo de diseñar una estrategia de intervención para el cuidado de los/as adolescentes en salud sexual y reproductiva que contribuya a elevar el conocimiento de estos, dirigido a los/as adolescentes del Consultorio # 9 del Policlínico Docente Dr. Carlos J. Finlay en el periodo de enero-diciembre del 2009, municipio Marianao. La muestra quedó constituida por 43 adolescentes procedentes del consultorio, lo que constituyó el 100% d...

  5. The human operculo-insular cortex is pain-preferentially but not pain-exclusively activated by trigeminal and olfactory stimuli.

    Directory of Open Access Journals (Sweden)

    Jörn Lötsch

    Full Text Available Increasing evidence about the central nervous representation of pain in the brain suggests that the operculo-insular cortex is a crucial part of the pain matrix. The pain-specificity of a brain region may be tested by administering nociceptive stimuli while controlling for unspecific activations by administering non-nociceptive stimuli. We applied this paradigm to nasal chemosensation, delivering trigeminal or olfactory stimuli, to verify the pain-specificity of the operculo-insular cortex. In detail, brain activations due to intranasal stimulation induced by non-nociceptive olfactory stimuli of hydrogen sulfide (5 ppm or vanillin (0.8 ppm were used to mask brain activations due to somatosensory, clearly nociceptive trigeminal stimulations with gaseous carbon dioxide (75% v/v. Functional magnetic resonance (fMRI images were recorded from 12 healthy volunteers in a 3T head scanner during stimulus administration using an event-related design. We found that significantly more activations following nociceptive than non-nociceptive stimuli were localized bilaterally in two restricted clusters in the brain containing the primary and secondary somatosensory areas and the insular cortices consistent with the operculo-insular cortex. However, these activations completely disappeared when eliminating activations associated with the administration of olfactory stimuli, which were small but measurable. While the present experiments verify that the operculo-insular cortex plays a role in the processing of nociceptive input, they also show that it is not a pain-exclusive brain region and allow, in the experimental context, for the interpretation that the operculo-insular cortex splay a major role in the detection of and responding to salient events, whether or not these events are nociceptive or painful.

  6. The human operculo-insular cortex is pain-preferentially but not pain-exclusively activated by trigeminal and olfactory stimuli.

    Science.gov (United States)

    Lötsch, Jörn; Walter, Carmen; Felden, Lisa; Nöth, Ulrike; Deichmann, Ralf; Oertel, Bruno G

    2012-01-01

    Increasing evidence about the central nervous representation of pain in the brain suggests that the operculo-insular cortex is a crucial part of the pain matrix. The pain-specificity of a brain region may be tested by administering nociceptive stimuli while controlling for unspecific activations by administering non-nociceptive stimuli. We applied this paradigm to nasal chemosensation, delivering trigeminal or olfactory stimuli, to verify the pain-specificity of the operculo-insular cortex. In detail, brain activations due to intranasal stimulation induced by non-nociceptive olfactory stimuli of hydrogen sulfide (5 ppm) or vanillin (0.8 ppm) were used to mask brain activations due to somatosensory, clearly nociceptive trigeminal stimulations with gaseous carbon dioxide (75% v/v). Functional magnetic resonance (fMRI) images were recorded from 12 healthy volunteers in a 3T head scanner during stimulus administration using an event-related design. We found that significantly more activations following nociceptive than non-nociceptive stimuli were localized bilaterally in two restricted clusters in the brain containing the primary and secondary somatosensory areas and the insular cortices consistent with the operculo-insular cortex. However, these activations completely disappeared when eliminating activations associated with the administration of olfactory stimuli, which were small but measurable. While the present experiments verify that the operculo-insular cortex plays a role in the processing of nociceptive input, they also show that it is not a pain-exclusive brain region and allow, in the experimental context, for the interpretation that the operculo-insular cortex splay a major role in the detection of and responding to salient events, whether or not these events are nociceptive or painful. PMID:22496865

  7. Proton Upset Monte Carlo Simulation

    Science.gov (United States)

    O'Neill, Patrick M.; Kouba, Coy K.; Foster, Charles C.

    2009-01-01

    The Proton Upset Monte Carlo Simulation (PROPSET) program calculates the frequency of on-orbit upsets in computer chips (for given orbits such as Low Earth Orbit, Lunar Orbit, and the like) from proton bombardment based on the results of heavy ion testing alone. The software simulates the bombardment of modern microelectronic components (computer chips) with high-energy (.200 MeV) protons. The nuclear interaction of the proton with the silicon of the chip is modeled and nuclear fragments from this interaction are tracked using Monte Carlo techniques to produce statistically accurate predictions.

  8. ASSE ENTERO-INSULARE E METABOLISMO GLICO-LIPIDICO NEL DIABETE DI TIPO 2 E NELL’OBESITÀ: EFFETTI DELLA CHIRURGIA BARIATRICA E DI DIVERSI INTERVENTI NUTRIZIONALI

    OpenAIRE

    Griffo, Ettore

    2014-01-01

    Le evidenze scientifiche attribuiscono agli ormoni dell’asse entero-insulare (GLP-1 e GIP), molteplici azioni che vanno dalla regolazione dell’omeostasi glicemica e lipidica al controllo del senso di fame, dell’assunzione di cibo e, quindi, dell’introito energetico. Molte funzioni svolte dagli ormoni dell’asse entero-insulare si sono evidenziate solo dopo gli interventi di chirurgia bariatrica attuati per la terapia dell’obesità morbigena. Durante il triennio del corso di dottorato in “Scienz...

  9. Synchronous Parallel Kinetic Monte Carlo

    Energy Technology Data Exchange (ETDEWEB)

    Mart?nez, E; Marian, J; Kalos, M H

    2006-12-14

    A novel parallel kinetic Monte Carlo (kMC) algorithm formulated on the basis of perfect time synchronicity is presented. The algorithm provides an exact generalization of any standard serial kMC model and is trivially implemented in parallel architectures. We demonstrate the mathematical validity and parallel performance of the method by solving several well-understood problems in diffusion.

  10. Monte Carlo Particle Lists: MCPL

    CERN Document Server

    Kittelmann, Thomas; Knudsen, Erik B; Willendrup, Peter; Cai, Xiao Xiao; Kanaki, Kalliopi

    2016-01-01

    A binary format with lists of particle state information, for interchanging particles between various Monte Carlo simulation applications, is presented. Portable C code for file manipulation is made available to the scientific community, along with converters and plugins for several popular simulation packages.

  11. Determinacion de periodos fundamentales del suelo mediante vibraciones ambientales en el municipio de Humacao, Puerto Rico

    Science.gov (United States)

    Cintron Aponte, Rommel

    La tecnica de Nakamura ha sido utilizada a nivel mundial para determinar periodos fundamentales del suelo. La tecnica consiste en calcular y graficar cocientes espectrales H/V de vibraciones ambientales registradas sobre el suelo. Mediciones de vibraciones ambientales fueron tomadas en 151 lugares dentro del municipio de Humacao, localizado al este de Puerto Rico. Los datos se procesaron utilizando espectros de Fourier y espectros de potencia. La tecnica fue validada al compararla con los resultados de cocientes espectrales H/V de registros de sismos debiles y tambien con una modelacion numerica realizada con datos de un ensayo "downhole". Las graficas de los cocientes espectrales H/V fueron divididas en casos y grupos, los cuales dependen de la facilidad para identificar el periodo fundamental pico y amplitudes en frecuencias menores de 1 Hz, respectivamente. Los resultados obtenidos con ambos espectros fueron comparados y se concluye que los mismos se complementan para proveer resultados mas confiables. Se crearon mapas de periodos fundamentales, factores de amplitud, isoperiodos y clasificacion sismica de sitio. Los mapas de isoperiodos fueron realizados en las zonas mas pobladas sobre depositos de suelo. El mapa de periodos fundamentales del suelo mostro buena correlacion con la geologia local. El mapa de clasificacion sismica derivado de periodos de sitio fue comparado con el mapa de clasificacion sismica derivado de barrenos geotecnicos. El mapa de clasificacion obtenido de periodos puede sobreestimar un poco algunas clasificaciones del suelo. Sin embargo, este mapa puede proveer un estimado aproximado de la velocidad de onda de corte promedio del suelo hasta una profundidad de 100 pies (30 metros).

  12. REIVINDICACIÓN DE LOS EJIDOS EN EL MUNICIPIO LIBERTADOR, DISTRITO CAPITAL

    Directory of Open Access Journals (Sweden)

    Marcelo Carrasco

    2009-01-01

    Full Text Available La ciudad de Caracas dispuso de ejidos desde el año 1594, cuando el Gobernador de la Provincia de Venezuela Don Diego de Osorio los decretó, con la finalidad de que Santiago de León estuviera provista de reservas de tierras para bosques, aguas, y pastos. Los ejidos históricos incluyeron la Serranía del Ávila y sus vertientes montañosas, así como el valle de Caracas y sus inmediaciones no adjudicadas como mercedes de tierras a los conquistadores. Mediante el proceso de composición de tierras liderado por los ediles del Cabildo, casualmente terratenientes, fueron expandiendo la gran propiedad privada en detrimento de los ejidos y de los resguardos indígenas. Mediante una política con fundamentos legales y cartográficos consistentes, la alcaldía del municipio Libertador con la participación de la Dirección de Catastro y el apoyo de la Sindicatura Municipal logró en tiempos recientes la reivindicación parcial de terrenos ejidales, cumpliendo con el mandato de las Leyes respectivas que permiten su investigación, delimitación, conformación legal mediante decretos e incluso su protocolización como son los ejidos hoy reivindicados ubicados en las Parroquias Antímano, El Junquito, La Vega, El Valle, Santa Rosalía y El Paraíso, cuyos casos se exponen en el presente trabajo.

  13. Talento humano y trabajo en equipo del personal directivo de las universidades del municipio Maracaibo

    Directory of Open Access Journals (Sweden)

    Maribel Medina Fuenmayor

    2010-01-01

    Full Text Available El propósito de esta investigación fue determinar la relación entre talento humano y trabajo en equipo del personal directivo de las universidades del Municipio Maracaibo, sobre la base de los enfoques teóricos de Alles (2005, Dolan et al. (2003, Gubman (2000, Hayes (2002, Jericó (2001, entre otros. La investigación se tipificó como correlacional, no experimental y transversal, utilizando una población de 31 sujetos pertenecientes a la planta directiva de administración de las referidas universidades públicas y privadas. La técnica de recolección de datos fue la observación mediante encuesta, para lo cual se diseñaron dos (2 instrumentos de recolección de datos, estructurados con cinco alternativas de respuestas bajo una escala de actitud tipo Likert, utilizando una validez de contenido por el criterio de 10 expertos, utilizando además el análisis discriminante de ítems, lo cual permitió mayor certeza en sus diseños. La confiabilidad fue calculada por el coeficiente Alfa de Cronbach, el cual arrojó un valor de 0.99 para talento humano y 0.91 para trabajo en equipo, siendo altamente consistentes. Los resultados se analizaron mediante estadística descriptiva con frecuencias absolutas y porcentuales, soportadas con medidas de tendencia central, haciendo uso además de la estadística inferencial con pruebas no paramétricas. Como conclusión, se observó una correlación con dirección positiva y magnitud fuerte entre las variables con un índice rho de Spearman de 0.88, lo que sugiere que bajo las actuales condiciones de este estudio existe una fuerte concomitancia entre las variables.

  14. Eventos adversos temporalmente asociados a VAMENGOC- BC®. Municipio La Lisa, 1998-1999

    Directory of Open Access Journals (Sweden)

    Iván Edelberto Cuevas

    2000-12-01

    Full Text Available Con el objetivo de describir la frecuencia de eventos temporalmente asociados a la vacuna cubana VAMENGOC- BC®, se realizó un estudio observacional de tipo descriptivo, cuyo universo estuvo constituido por los lactantes en las edades comprendidas de tres (3549 y cinco meses (3832 de edad de las áreas de salud del Municipio La Lisa en Ciudad de La Habana. Hubo un 3,21% de niños con eventos adversos, con una mayor frecuencia después de la primera dosis; sin diferencias apreciables por sexo. La clasificación fue de un 52% de tipo sistémico, locales un 19% y no solicitados un 29%. La mayor parte de los niños afectados fue en las primeras 72 horas posteriores a la vacunación, y desaparecieron antes de 72 horas desde su comienzo. Las manifestaciones más frecuentes fueron fiebre (predominó entre todos los eventos adversos con 1,53 casos por 100 vacunados; la induración (0,31 por 100 vacunados, eritema (0,30 por 100 vacunados y el dolor (0,136 por 100 vacunados en el sitio de administración de la vacuna; irritabilidad (0,244 por 100 vacunados y pérdida de apetito (0,311 por 100 vacunados. Los eventos no solicitados más frecuentes fueron la Enfermedad Respiratoria Aguda (0,637 por 100 vacunados, la Enfermedad Diarreica Aguda (0,311 por 100 vacunados y la Otitis Media (0,176 por 100 vacunados. Los eventos adversos serios fueron infrecuentes. No hubo fallecidos y todos los casos se recuperaron en menos de diez días, sin secuelas, discapacidades ni minusvalías

  15. ALTERNATIVA DE CORREDOR ECOLÓGICO EN LA ZONA NORORIENTAL DEL MUNICIPIO DE MEDELLÍN

    Directory of Open Access Journals (Sweden)

    VILLA GRAJALES ANA MARÍA

    2012-11-01

    Full Text Available El presente trabajo se realizó con el objetivo de establecer una alternativa de corredor ecológico de conexión estructural en las comunas 1, 2, 3 y 4 de la zona nor-oriental del municipio de Medellín, orientada a la  protección del suelo verde existente y a la toma de decisiones en cuanto a la generación de nuevo suelo, utilizando las métricas del paisaje y herramientas geoinformaticas. Se utilizó un área de 400 m² como Unidad Mínima Cartografiable (UMC, encontrándose 296 ha (19,4% de áreas verdes respecto a las 1.527 ha de área de estudio, predominando la cobertura de pasto con 95,4 ha, mientras que la zona arbolada, con un área de 26,1 ha, mostró el mayor aislamiento (99,1 m, y el rastrojo alto con 48,7 ha presentó la mayor agregación (16,4 m. Se priorizaron ocho (8 fragmentos para la conservación, seleccionados a través del Índice de Calidad del Fragmento (ICF, sumando en total 26 ha. El corredor se estableció con un ancho de 80 m, arrojando un área total de 73,2 ha, asociada, en su mayoría, a retiros de quebradas.

  16. Geoprocesamiento aplicado al analisis del uso de la tierra en el municipio de San Pedro de Ycuamandyyú, Paraguay.

    Directory of Open Access Journals (Sweden)

    Oscar Agustín Torres Figueredo

    2010-08-01

    Full Text Available El municipio de San Pedro de Ycuamandyyú está ubicado en el noroeste de la región oriental del Paraguay. Los objetivos de este trabajo constituyen la elaboración y el análisis del mapa del uso de la tierra para la planificación de actividades forestales en la zona, para los cuales se utilizaron técnicas de cartografía, sensores remotos y (SIG Sistemas de Informaciones Geográficas, que posibilitaron el análisis de informaciones provenientes de imágenes satelitales LANDSAT TM 5, de cartas topográficas y de (GPS Sistema de Posicionamiento Global, que permitió el procesamiento de datos en el programa Idrisi 2.0 para la confección de un mapa que posibilitó el análisis sobre la situación del uso de la tierra en el municipio. Se distinguió categorías predominantes como praderas altas o campos naturales, uso agropecuario y praderas bajas o bañados, siendo la cobertura forestal con valor inferior al 25%. Se concluyó que el municipio presenta bastantes áreas de campos naturales y uso agropecuario que podrían utilizarse para actividades de reforestación, sea con especies nativas o exóticas de rápido crecimiento con la finalidad de obtener valores de cobertura forestal en equilibrio con las demás categorías de uso de la tierra.

  17. Aptitud relativa agrícola del municipio de Tuxpan, Nayarit, utilizando el modelo Almagra del Sistema MicroLEIS

    OpenAIRE

    José López García; Diego de la Rosa Acosta; José Irán Bojórquez Serrano

    2006-01-01

    Se realizó la evaluación de tierras para uso agrícola en la llanura fluviomarina dentro del municipio de Tuxpan, Nayarit, con base en un levantamiento de suelos semidetallado. Se evaluó la aptitud relativa agrícola, mediante la modificación del modelo Almagra del sistema MicroLEIS 4.1, el cual permite definir la aptitud relativa agrícola, de lo cual resulta el Almagra-Tuxpan, al crearse una base de datos con las condiciones específicas de esta región. Con base en el modelo Almagra...

  18. Fragilidad visual de la actividad minera de roca ornamental en el municipio de Cehegín (Murcia

    Directory of Open Access Journals (Sweden)

    Ma. de la Luz Tudela Serrano

    2002-01-01

    Full Text Available Todo proceso extractivo presenta una clara incidencia sobre el medio en el cual se desarrolla dejando una serie de secuelas en forma de impactos o riesgos potenciales. Debido a la importancia que los impactos visuales tienen para el desarrollo de la actividad minera de la roca ornamental se plantea en este trabajo determinar las zonas de mayor Fragilidad Visual del Municipio de Cehegín (Murcia y proporcionar una valiosa información de base para una Planificación del Territorio.

  19. LAS CADENAS PRODUCTIVAS, ESTRATEGIA DE DESARROLLO EMPRESARIAL PARA EL MUNICIPIO DE TAMUÍN, SAN LUIS POTOSÍ

    OpenAIRE

    Ana Diana Betancourt Enríquez; Hugo Daniel Navarro Payta

    2013-01-01

    El presente artículo tiene como principal objetivo el análisis del esquema de cadena productiva, como estrategia para el desarrollo competitivo empresarial del municipio de Tamuín, S.L.P., aunado al caso del Grupo Gusi Sociedad de Producción Rural de Responsabilidad Limitada de esta localidad. En la investigación se presentan lineamientos teóricos que incluyen la conceptualización de la cadena productiva, clasificación de la misma, ventajas de integración del esquema, y rubros de lo local a l...

  20. La deserción escolar en la educación rural, Municipio de El Fuerte, Sinaloa.

    OpenAIRE

    Ruíz Ramírez, Rosalva

    2014-01-01

    El objetivo de la investigación fue analizar las causas y consecuencias -de tipo personal, económico y social- que provocan la deserción escolar de estudiantes de preparatoria, caso Universidad Autónoma de Sinaloa (UAS) en el municipio El Fuerte. La pesquisa se efectuó en la Unidad Académica San Blas y sus extensiones La Constancia y Las Higueras de Los Natoches en 2013. Se trabajó con metodología de enfoque mixto analizando datos cualitativos y cuantitativos a través de observación directa, ...

  1. Diseños hidráulicos plan maestro de alcantarillado centro poblado la magdalena municipio de Quebradanegra

    OpenAIRE

    Castro Ladino, Nelson Yovani

    2012-01-01

    Este trabajo desarrolla los estudios y diseños hidráulicos del Plan Maestro de Alcantarillado del Centro Poblado La Magdalena del municipio de Quebradanegra Cundinamarca, en el marco de los Planes Departamentales para el Manejo Empresarial de los Servicios de Agua Potable y Saneamiento Básico (PDA), definidos por el Gobierno Nacional como estrategia de apoyo a la gestión municipal, a través del MAVDT y específicamente con el Viceministerio de Aguas y Saneamiento. Se reali...

  2. Conocimientos y prácticas en salud sexual y reproductiva de adolescentes escolares en un municipio colombiano

    OpenAIRE

    Rengifo reina, Herney Alonso; Cordoba Espinal, Alexandra; Serrano Rodriguez, Mayerlin

    2013-01-01

    Objetivo Identificar los conocimientos y prácticas en salud sexual y reproductiva de adolescentes del municipio de Miranda - Cauca en Colombia.Métodos Se realizó un estudio observacional descriptivo de corte transversal. La muestra fue de 406 adolescentes. Se exploraron variables en tres áreas o categorías: sociodemográficas, de conocimiento y de prácticas. Resultados Se presentaron conocimientos en niveles altos y muy alto, donde     90,5 % (362) de adolescentes habían recibido información s...

  3. Sistemas agro y silvopastoriles en El Limón, municipio de Paso de Ovejas, Veracruz, México

    OpenAIRE

    Bautista Tolentino, Marcelo

    2012-01-01

    La caracterización de los sistemas agroforestales es una buena herramienta que en su momento proporciona elementos de análisis para la toma de decisiones en sistemas de uso del suelo. El objetivo de la investigación fue caracterizar los sistemas agroforestales de acuerdo a sus componentes (agrícola, forestal y pecuario) y al principal uso de las especies arbóreas en la comunidad El Limón, municipio de Paso de Ovejas, Veracruz. Además evaluar la producción de biomasa vegetal y composición quím...

  4. Caracterizacion de la Macrofauna dulceacuícola de invertebrados del río Sevilla, municipio Niquero (Granma

    Directory of Open Access Journals (Sweden)

    Damaiky Hernández Duarte

    2005-01-01

    Full Text Available En el presente trabajo se realizó una caracterización faunística y ecológica del río Sevilla ubicado en el municipio Niquero, Provincia Granma. Se ofrece una lista anotada de las 63 taxa infragenéricos representados por 3061 individuos colectados en las siete localidades investigadas desde noviembre del 2002 hasta febrero del 2003, durante los períodos de lluvia y seca. Además se ofrece un análisis al nivel de las especies estudiadas utilizando índices como frecuencia, constancia, abundancia e importancia relativa.

  5. Tratamiento de aguas residuales con humedales artificiales en Tlapanaloya, municipio de Tequisquiac, Estado de México.

    OpenAIRE

    Avelar Roblero, Juan Uriel

    2011-01-01

    La presente tesis tiene como objeto proponer, mostrar y validar una alternativa basada en el uso y acondicionamiento de humedales artificiales, para resolver el problema de salud pública y contaminación ambiental que genera la descarga de aguas residuales. El campo de estudio y evaluación fue la cabecera municipal de Hueypoxtla, Estado de México, cuyas aguas residuales vierten directamente al cauce del Río Salado, el cual cruza por la comunidad de Tlapanaloya, municipio de Tequisquiac, Estado...

  6. Implementación de red WiMAX/WiFi en el municipio de Llançà

    OpenAIRE

    Martínez Campo, José

    2013-01-01

    Diseño de una red telemática. Implementación de una red WiMAX/WiFi de acceso público en localizaciones turísticas en el municipio de Llançà. Disseny d'una xarxa telemàtica. Implementació d'una xarxa WiMAX/WiFi d'accés públic en localitzacions turístiques en el municipi de Llançà. Bachelor thesis for the Telecommunication Technologies program on Telematics.

  7. ANÁLISIS, PROPUESTA DE ORGANIZACIÓN Y MEJORAS DEL TRANSPORTE PÚBLICO DEL MUNICIPIO DE TORRENT

    OpenAIRE

    Ávila Puerto, José Luis

    2012-01-01

    El objeto del presente TFC es la mejora del Servicio Municipal de Transporte Público del ayuntamiento de Torrent, mediante la reorganización del Servicio de Información de Transporte Público que permita mejorar la atención al ciudadano y a su vez asegure una mayor agilidad en la tramitación de las diversas quejas o sugerencias que las personas puedan realizar. Así como también la mejora de los Servicios de Transporte Público que tiene el municipio, tanto en el Servicio Torre...

  8. Habilidades y representaciones sociales de alumnos de escuelas estatales del municipio de S??o Paulo (Brasil)

    OpenAIRE

    Maria Laura Puglisi Barbosa Franco

    2011-01-01

    Este trabajo hace parte de una investigaci??n m??s amplia que tuvo como objetivo correlatar el rendimiento escolar y el desempe??o en ???habilidades sociales??? con vistas a la formaci??n del ciudadano. Fue desarrollada junto a 741 alumnos de Escuelas Estaduales del Municipio de S??o Paulo, Brasil Teniendo en vista la correlaci??n positiva, observada entre el desempe??o en ???habilidades sociales??? y el rendimiento escolar (principalmente en los ex??menes de Lengua...

  9. Salud laboral en artesanos de microempresas en un municipio mexicano: una investigación-acción participativa

    OpenAIRE

    Anaya Velasco, Ana; Universidad de Guadalajara; Aranda Beltrán, Carolina; Universidad de Guadalajara; Torres López, Teresa Margarita; Universidad de Guadalajara

    2013-01-01

    El presente trabajo describe una investigación-acción participativa para conocer las condiciones de salud y la evolución de grupo en diez microempresas en un municipio mexicano. Para evaluar las primeras se utilizó el Cuestionario de Grupo Homogéneo, extraído del modelo obrero italiano original, y para la segunda un listado de momentos de integración de grupos operativos e indicadores. Se identificaron condiciones peligrosas, tales como ruido, polvo, exposición a instrumentos cortantes y exig...

  10. Tentativas de suicidio en el municipio de Valencia: evolución y distribución urbana.

    OpenAIRE

    J Gimeno Adelantado; Manuel Gómez Beneyto

    1993-01-01

    Se analizan las tentativas de suicidio registradas en los hospitales públicos del municipio de Valencia desde 1982 a 1985. La evolución temporal indica un mantenimiento de las tasas anuales, con un incremento relativo de la proporción de hombres y de los intervalos de edad de 15 a 29 y más de 60. La sobredosis de medicamentos tiende a disminuir, así como los ingresos, tanto en sala como en UCI. La distribución urbana revela la existencia de tres áreas de alto riesgo barrios "artificiales" cre...

  11. La discapacidad en niños hasta los seis años de edad del municipio Majibacoa

    OpenAIRE

    Nadia Rosa Hechavarría Almaguer; Antonio del Valle Torres; Niuris Carmenate Olano; Yuselis Pérez Cid; José Ángel Arzuaga Meriño

    2014-01-01

    La discapacidad infantil constituye un gran problema de salud a nivel mundial; conocer sus características permite mejorar su asistencia. Se realizó un estudio descriptivo de corte transversal, en una muestra de 84 niños diagnosticados con discapacidad transitoria y/o permanente, con el objetivo de caracterizar la discapacidad en niños hasta seis años de edad en el municipio de Majibacoa. Se aplicó un cuestionario a los padres y se realizó un examen físico detallado a los niños, la discapacid...

  12. MODELO DE GOBIERNO ELECTRÓNICO PARA LA ALCALDÍA RURAL DEL MUNICIPIO AUTÓNOMO COLÓN

    OpenAIRE

    Albanio Alcántara Acosta; Jesús J. Cendros Guasch

    2006-01-01

    En la actualidad el avance de las nuevas tecnologías y el progresivo acceso de los ciudadanos a la red de Internet esta abriendo camino a nuevas posibilidades en el campo del gobierno, descubriendo a Internet como una instrumento de evolución en la forma de relación entre las administraciones públicas y los ciudadanos. El propósito del presente estudio fue proponer un modelo de gobierno electrónico para la Alcaldía rural del municipio autónomo Colón. La investigación fue de tipo descripti...

  13. MODELO DE GOBIERNO ELECTRÓNICO PARA LA ALCALDÍA RURAL DEL MUNICIPIO AUTÓNOMO COLÓN

    Directory of Open Access Journals (Sweden)

    Albanio Alcántara Acosta

    2006-01-01

    Full Text Available En la actualidad el avance de las nuevas tecnologías y el progresivo acceso de los ciudadanos a la red de Internet esta abriendo camino a nuevas posibilidades en el campo del gobierno, descubriendo a Internet como una instrumento de evolución en la forma de relación entre las administraciones públicas y los ciudadanos. El propósito del presente estudio fue proponer un modelo de gobierno electrónico para la Alcaldía rural del municipio autónomo Colón. La investigación fue de tipo descriptiva y de campo. La población y muestra se dividió en dos tipos, la población A 101.219 habitantes del municipio Colón quedando su muestra en 204 sujetos y la población B de 13 Coordinadores y jefes de unidades de la Alcaldía tomándolos como censo poblacional. Utilizando instrumentos con preguntas cerradas para la población A y tipo likert para la población B. Se aplicaron estadísticas descriptivas con frecuencias absolutas y porcentuales para la población A, permitiendo concluir que la brecha digital en el municipio es del 67%, viéndose afectada mayormente por el nivel académico de la población, de igual manera se realizó un análisis de varianza para la población B obteniendo como resultado que la alcaldía necesita la contratación de personal especializado en el área de tecnología, así como también la creación de un portal Web que contenga los servicios ofrecidos por la alcaldía. Se recomienda establecer el Modelo de Gobierno Electrónico para la Alcaldía Rural del Municipio Autónomo Colón del Estado Zulia propuesto planteado en esta investigación.

  14. GOBIERNO ELECTRÓNICO DE LA ALCALDÍA DEL MUNICIPIO CARIRUBANA DEL ESTADO FALCÓN - VENEZUELA

    OpenAIRE

    Felix Scarbay; Doris Parra; Niorka Medina

    2008-01-01

    El propósito de esta investigación fue determinar los factores organizacionales, tecnológicos y legales que inciden en el desarrollo del Gobierno Electrónico en la alcaldía del Municipio Carirubana, así como determinar la brecha digital existente en los ciudadanos que habitan en él proponiendo lineamientos estratégicos para desarrollar el Gobierno electrónico. La investigación es de tipo descriptivo de campo. La metodología utilizada fue dividida en fases y actividades que generaban entradas ...

  15. Los Pteridófitos de un bosque subandino en el municipio de Albán, Cundinamarca (Colombia)

    OpenAIRE

    Triana Moreno Luz Amparo; Murillo Aldana José

    2004-01-01

    Se presenta el tratamiento taxonómico de los helechos y plantas afines de un bosque subandino localizado en el municipio de Albán, al occidente de Cundinamarca, entre 1.900 y 2.100 m de altitud. El área de estudio comprende una su erficie de 70 ha, de las cuales 22 corres-ponden a un relicto de bosque subandino. Allí se registran 107 especies distribuidas en
    45 géneros (38% de los géneros colombianos) y 21 familias (60% de las familias del país),   resultados importantes teniendo e...

  16. SIGNIFICANCE OF THE PERI-INSULAR EXTRACELLULAR-MATRIX FOR ISLET ISOLATION FROM THE PANCREAS OF RAT, DOG, PIG, AND MAN

    NARCIS (Netherlands)

    VANDEIJNEN, JHM; HULSTAERT, CE; WOLTERS, GHJ; VANSCHILFGAARDE, R

    1992-01-01

    The presence and distribution in the peri-insular region of extracellular matrix, and in particular basement membrane, was investigated in a comparative study comprising pancreata of rat, dog, pig, and man. Basement membrane markers, collagen type-IV and laminin, were determined immunohistochemicall

  17. 19 CFR 7.3 - Duty-free treatment of goods imported from insular possessions of the United States other than...

    Science.gov (United States)

    2010-04-01

    ... for informal entry under § 143.21 of this chapter or in any case where the port director is otherwise... goods in a shipment not eligible for informal entry under § 143.21 of this chapter are sought to be... the insular possession in substantially the following form: I, (name) of (organization) do...

  18. Medicaid and CHIP: Opportunities Exist to Improve U.S. Insular Area Demographic Data That Could Be Used to Help Determine Federal Funding. GAO-09-558R

    Science.gov (United States)

    Kohn, Linda T.

    2009-01-01

    The five largest insular areas of the United States--American Samoa, the Commonwealth of the Northern Mariana Islands (CNMI), Guam, Puerto Rico, and the U.S. Virgin Islands--receive federal funding through Medicaid and the State Children's Health Insurance Program (CHIP), joint federal-state programs that finance health care for certain low-income…

  19. Mid-Holocene (4200 yr BP) mass mortalities in Mauritius (Mascarenes): insular vertebrates resilient to climatic extremes but vulnerable to human impact

    NARCIS (Netherlands)

    K.F. Rijsdijk; J. Zinke; P.G.B. de Louw; J.P. Hume; J. van der Plicht; H. Hooghiemstra; H.J.M. Meijer; H.B. Vonhof; N. Porch; V Florens; C. Baider; B. van Geel; J. Brinkkemper; T. Vernimmen; A. Janoo

    2011-01-01

    In the light of the currently increasing drought frequency and water scarcity on oceanic islands, it is crucial for the conservation of threatened insular vertebrates to assess how they will be affected. A 4000 yr old fossil assemblage in the Mare Aux Songes (MAS), southwest Mauritius, Mascarene Isl

  20. Mid-Holocene (4200 kyr BP) mass mortalities in Mauritius (Mascarenes) : Insular vertebrates resilient to climatic extremes but vulnerable to human impact

    NARCIS (Netherlands)

    Rijsdijk, Kenneth F.; Zinke, Jens; de Louw, Perry G. B.; Hume, Julian P.; van der Plicht, Hans (J); Hooghiemstra, Henry; Meijer, Hanneke J. M.; Vonhof, Hubert B.; Porch, Nick; Florens, F. B. Vincent; Baider, Claudia; van Geel, Bas; Brinkkemper, Joost; Vernimmen, Tamara; Janoo, Anwar

    2011-01-01

    In the light of the currently increasing drought frequency and water scarcity on oceanic islands, it is crucial for the conservation of threatened insular vertebrates to assess how they will be affected. A 4000 yr old fossil assemblage in the Mare Aux Songes (MAS), southwest Mauritius, Mascarene Isl

  1. THE ASSOCIATION OF WELL-DIFFERENTIATED THYROID-CARCINOMA WITH INSULAR OR ANAPLASTIC THYROID-CARCINOMA - EVIDENCE FOR DEDIFFERENTIATION IN TUMOR PROGRESSION

    NARCIS (Netherlands)

    van der Laan, Bernard F.A.M.; FREEMAN, JL; TSANG, RW; ASA, SL

    1993-01-01

    The sequence of tumorigenesis in the thyroid is unclear. It has been proposed that anaplastic carcinomas of the thyroid develop by dedifferentiation in pre-existing differentiated carcinomas. We reviewed all anaplastic and insular (poorly differentiated) thyroid carcinomas in a consultation practice

  2. Mezcla de promoción para la comercialización de municipios turísticos. Estudio de caso en el municipio Gibara del destino Holguín/Cuba. Un acercamiento desde La Habana Vieja

    Directory of Open Access Journals (Sweden)

    Litzandra Guerrero Arias

    2013-12-01

    Full Text Available El presente texto constituye un estudio de caso sobre Gibara, uno de los municipios de la provincia Holguín, de Cuba, que cuenta con numerosos y atractivos recursos insuficientemente explotados. Desde el punto de vista teórico se apoya en el Marketing Turístico como una opción ineludible para alcanzar importantes niveles de preferencia entre los consumidores y tiene como objetivo diseñar la mezcla de promoción comercial para Gibara como municipio turístico. Dentro de la investigación se utilizaron procedimientos lógicos del conocimiento científico, el enfoque teórico sistémico estructural, métodos empíricos relacionados con instrumentos sicosociales de búsqueda de información y la modelación como método teórico. Como resultado se obtuvo la propuesta metodológica para el diseño de la mezcla y se aplicaron de forma práctica el diseño de dos de sus instrumentos: el Programa de Publicidad y el Programa de Relaciones Públicas. Este estudio podría tributar al crecimiento del territorio como destino, pero también podría ser aplicable a otras localidades con potencialidades para el desarrollo del turismo.

  3. Mezcla de promoción para la comercialización de municipios turísticos. Estudio de caso en el municipio Gibara del destino Holguín/Cuba. Un acercamiento desde La Habana Vieja

    Directory of Open Access Journals (Sweden)

    Litzandra Guerrero Arias

    2013-11-01

    Full Text Available El presente texto constituye un estudio de caso sobre Gibara, uno de los municipios de la provincia Holguín, de Cuba, que cuenta con numerosos y atractivos recursos insuficientemente explotados. Desde el punto de vista teórico se apoya en el Marketing Turístico como una opción ineludible para alcanzar importantes niveles de preferencia entre los consumidores y tiene como objetivo diseñar la mezcla de promoción comercial para Gibara como municipio turístico. Dentro de la investigación se utilizaron procedimientos lógicos del conocimiento científico, el enfoque teórico sistémico estructural, métodos empíricos relacionados con instrumentos sicosociales de búsqueda de información y la modelación como método teórico. Como resultado se obtuvo la propuesta metodológica para el diseño de la mezcla y se aplicaron de forma práctica el diseño de dos de sus instrumentos: el Programa de Publicidad y el Programa de Relaciones Públicas. Este estudio podría tributar al crecimiento del territorio como destino, pero también podría ser aplicable a otras localidades con potencialidades para el desarrollo del turismo.

  4. Proyecto de reforma de la calle Pou y la calle Passeig de Mar del municipio de Sant Llorenç des Cardessar, Mallorca

    OpenAIRE

    Miguel Gaya, Rafel

    2012-01-01

    El Ayuntamiento de Sant Llorenç des Cardessar (Mallorca) cree oportuna una reforma y remodelación de la calle Pou y de un tramo de la calle Passeig de la Mar. En los estos últimos años, el Ayuntamiento ha estado reurbanizando varias calles del centro urbano del municipio debido al estado inadecuado de estas. Las calles a remodelar ámbito del presente proyecto, están situadas en el núcleo urbano de Sant Llorenç des Cardessar y forman parte del centro histórico del municipio. ...

  5. El protagonismo de los municipios en el desarrollo educativo: Propuesta de un modelo e instrumento para su análisis

    OpenAIRE

    Muñoz Moreno, José Luís; Gairín Sallán, Joaquín

    2015-01-01

    La presente aportación destaca las contribuciones más relevantes derivadas del estudio que indaga sobre algunas herramientas para diagnosticar el desarrollo educativo de los municipios promovido por los Ayuntamientos. Particularmente, profundiza en el diseño y la validación de un Modelo de estadios de desarrollo educativo y de un Instrumento para la autoevaluación que permiten analizar, de manera contextualizada, del desarrollo educativo de los municipios. La creación del Modelo y del Instrum...

  6. La problemática del manejo de los residuos sólidos en seis municipios del sur de Zacatecas

    OpenAIRE

    Germaín A. Castañeda Delgado; Aldo A. Pérez Escatel

    2015-01-01

    los objetivos de la presente investigación son determinar la cantidad de residuos sólidos generados en seis municipios del estado de Zacatecas, México, y comparar su composición porcentual en peso y volumen. Los resultados muestran la complejidad para el tratamiento y la disposición final de residuos sólidos en los municipios rurales y urbanos, debido a los grandes volúmenes generados y a los cambios en los patrones de consumo, que revelan la necesidad de emprender proyectos enfocados a su re...

  7. Inventario de atractivos para el desarrollo turístico local del municipio Martí. Inventory of attractions for local tourist development of the Marti municipality.

    OpenAIRE

    Mabel Font Aranda; Leonardo Cuétara Sánchez; Yoleidy Castanedo Aneiro; Mavis Acosta Peñate; Daylis Delgado Fajardo; Dubier Caña Pereira; Orestes Morales; Yuri La Rosa Martínez

    2013-01-01

    El deterioro del sector agropecuario en el municipio Martí, exige la necesidad de ejecución de un grupo de proyectos de desarrollo local, que permitan revertir los procesos en el ámbito social, económico y ambiental a partir de los recursos naturales y socioculturales propios. Sobre la base anterior, se realizó el inventario de recursos/atractivos del municipio Martí como parte del diseño de productos turísticos a ofrecer  en la búsqueda de alternativas para el desarrollo local. Se registró y...

  8. Kinematics of multigrid Monte Carlo

    International Nuclear Information System (INIS)

    We study the kinematics of multigrid Monte Carlo algorithms by means of acceptance rates for nonlocal Metropolis update proposals. An approximation formula for acceptance rates is derived. We present a comparison of different coarse-to-fine interpolation schemes in free field theory, where the formula is exact. The predictions of the approximation formula for several interacting models are well confirmed by Monte Carlo simulations. The following rule is found: For a critical model with fundametal Hamiltonian Η(φ), absence of critical slowing down can only be expected if the expansion of (Η(φ+ψ)) in terms of the shift ψ contains no relevant (mass) term. We also introduce a multigrid update procedure for nonabelian lattice gauge theory and study the acceptance rates for gauge group SU(2) in four dimensions. (orig.)

  9. Neural Adaptive Sequential Monte Carlo

    OpenAIRE

    Gu, Shixiang; Ghahramani, Zoubin; Turner, Richard E

    2015-01-01

    Sequential Monte Carlo (SMC), or particle filtering, is a popular class of methods for sampling from an intractable target distribution using a sequence of simpler intermediate distributions. Like other importance sampling-based methods, performance is critically dependent on the proposal distribution: a bad proposal can lead to arbitrarily inaccurate estimates of the target distribution. This paper presents a new method for automatically adapting the proposal using an approximation of the Ku...

  10. Adaptive Multilevel Monte Carlo Simulation

    KAUST Repository

    Hoel, H

    2011-08-23

    This work generalizes a multilevel forward Euler Monte Carlo method introduced in Michael B. Giles. (Michael Giles. Oper. Res. 56(3):607–617, 2008.) for the approximation of expected values depending on the solution to an Itô stochastic differential equation. The work (Michael Giles. Oper. Res. 56(3):607– 617, 2008.) proposed and analyzed a forward Euler multilevelMonte Carlo method based on a hierarchy of uniform time discretizations and control variates to reduce the computational effort required by a standard, single level, Forward Euler Monte Carlo method. This work introduces an adaptive hierarchy of non uniform time discretizations, generated by an adaptive algorithmintroduced in (AnnaDzougoutov et al. Raùl Tempone. Adaptive Monte Carlo algorithms for stopped diffusion. In Multiscale methods in science and engineering, volume 44 of Lect. Notes Comput. Sci. Eng., pages 59–88. Springer, Berlin, 2005; Kyoung-Sook Moon et al. Stoch. Anal. Appl. 23(3):511–558, 2005; Kyoung-Sook Moon et al. An adaptive algorithm for ordinary, stochastic and partial differential equations. In Recent advances in adaptive computation, volume 383 of Contemp. Math., pages 325–343. Amer. Math. Soc., Providence, RI, 2005.). This form of the adaptive algorithm generates stochastic, path dependent, time steps and is based on a posteriori error expansions first developed in (Anders Szepessy et al. Comm. Pure Appl. Math. 54(10):1169– 1214, 2001). Our numerical results for a stopped diffusion problem, exhibit savings in the computational cost to achieve an accuracy of ϑ(TOL),from(TOL−3), from using a single level version of the adaptive algorithm to ϑ(((TOL−1)log(TOL))2).

  11. Monomial Gamma Monte Carlo Sampling

    OpenAIRE

    Zhang, Yizhe; Wang, Xiangyu; Chen, Changyou; Fan, Kai; Carin, Lawrence

    2016-01-01

    We unify slice sampling and Hamiltonian Monte Carlo (HMC) sampling by demonstrating their connection under the canonical transformation from Hamiltonian mechanics. This insight enables us to extend HMC and slice sampling to a broader family of samplers, called monomial Gamma samplers (MGS). We analyze theoretically the mixing performance of such samplers by proving that the MGS draws samples from a target distribution with zero-autocorrelation, in the limit of a single parameter. This propert...

  12. Prevalencia de anticuerpos para Trypanosoma cruzi en caninos de dos municipios endémicos de Boyacá

    Directory of Open Access Journals (Sweden)

    Diego Manrique Abril

    2012-04-01

    Full Text Available Objetivo. evaluar la prevalencia de anticuerpos anti Trypanosoma cruzi (T. cruzi en una muestra de caninos domésticos residentes en dos municipios endémicos. Materiales y métodos. Se tomaron muestras séricas de 20 caninos procedentes de hogares donde residen mujeres gestantes seropositivas y 40 perros habitantes de hogares de mujeres gestantes seronegativas en Miraflores y Moniquira, Boyacá. El análisis se realizó mediante prueba diagnóstica rápida dipstick de InBios. Resultados. Se encontró prevalencia del 16.7% en Moniquirá y del 13.3% Miraflores respectivamente con una prevalencia general del 15% en los dos municipios. Se halló riesgo 3 veces mayor de que ocurra la infección en caninos, en los hogares donde residen gestantes seropositivas; además la infestación por pulgas y garrapatas en el animal, hábitat cercano a la vivienda, se relacionan con mayor seropositividad en el canino. Conclusiones. La raza, el sexo, la presencia de aves en la casa y al examen clínico general son considerados factores pronósticos en en la infección por Trypanosoma cruzi en caninos. Como factores protectores se identificó la desparasitación y vacunación de los animales.

  13. Costos de los servicios prestados por los hoteles tres estrellas del municipio Libertador del estado Mérida

    Directory of Open Access Journals (Sweden)

    Marysela Coromoto Morillo Moreno

    2014-01-01

    Full Text Available A objeto de describir el proceso de determinación de costos de los servicios prestados por los hoteles turísticos de tres estrellas del municipio Libertador del estado Mérida, de cara a la optimización de dicho proceso, se diseñó una investigación no experimental, en la cual se recolectaron datos a través de un guión de observación y la aplicación de una encuesta a los gerentes y administradores de dichos establecimientos. Los resultados indican que los hoteles ofrecen diversas opciones de alojamiento, además de diversos servicios (restaurantes, salones para eventos y lavanderías, los cuales poseen tarifas separadas. Por otra parte, el 72% de los hoteles tres estrellas del municipio mencionado calculan el costo total de todos los servicios que prestan, lo cual evidencia la existencia de un sistema de acumulación de costos inadecuado que imposibilita la disposición de información exacta y precisa acerca del costo de cada uno de los servicios prestados, lo que a su vez limita la toma de decisiones y la correcta operatividad empresarial. En este sentido, se sugiere la identificación de los objetos de costos en centros funcionales y operativos, así como métodos de asignación para el cálculo del costo de cada servicio

  14. La importancia económica de los municipios en el México del siglo XXI

    Directory of Open Access Journals (Sweden)

    Jaime Linares Zarco

    2012-01-01

    Full Text Available El desarrollo del capitalismo no se explica sin el de las ciudades, que por sí mismas constituyen una poderosa fuerza productiva al concentrar población, actividad industrial, servicios, centros educativos y de salud, áreas administrativas y políticas, además de grandes nodos de comunicaciones y transportes, a expensas del atraso regional del resto del país. El objetivo de este trabajo es analizar la estructura económica de las "células" de México, es decir, los municipios; su contribución a la generación de riqueza en cada entidad, así como su participación en el valor agregado nacional, a fin de cuantificar el grado de concentración económica. La hipótesis plantea que la enorme centralización de actividades económicas en unos cuantos municipios, si bien ha generado más empleos y producción, se ha focalizado y, por tanto, no se ha traducido en una mejoría económica para la mayoría de la población estatal, que ha engrosado las filas de la pobreza, desempleo y emigración hacia Estados Unidos.

  15. GOBIERNO ELECTRÓNICO DE LA ALCALDÍA DEL MUNICIPIO CARIRUBANA DEL ESTADO FALCÓN - VENEZUELA

    Directory of Open Access Journals (Sweden)

    Felix Scarbay

    2008-05-01

    Full Text Available El propósito de esta investigación fue determinar los factores organizacionales, tecnológicos y legales que inciden en el desarrollo del Gobierno Electrónico en la alcaldía del Municipio Carirubana, así como determinar la brecha digital existente en los ciudadanos que habitan en él proponiendo lineamientos estratégicos para desarrollar el Gobierno electrónico. La investigación es de tipo descriptivo de campo. La metodología utilizada fue dividida en fases y actividades que generaban entradas y salidas que fueron utilizadas en las actividades posteriores, concluyendo que la brecha digital existente en el uso de Internet en los ciudadanos es de 82%, y esta determinada básicamente por el nivel económico de las personas, el acceso a la tecnología y del conocimiento en el manejo de Internet, también influye el nivel educativo que presentan los ciudadanos del municipio Carirubana. Por otra parte los servicios de mayor demanda por parte del público son el pago de ejidos, trimestres y la solicitud de documentos oficiales.

  16. Flora medicinal en San Nicolás, municipio de Malinalco, Estado de México

    Directory of Open Access Journals (Sweden)

    Laura White-Olascoaga

    2015-08-01

    Full Text Available Se determinaron aspectos sobre el hábitat, uso y función de los recursos vegetales utilizados en la medicina tradicional, en la comunidad de San Nicolás, municipio de Malinalco, ubicada al sur del Estado de México. De enero de 2010 a enero de 2011 se aplicaron entrevistas a 30 hombres y mujeres, de entre 20 y 60 años de edad. La observación directa y participativa permitió verifi car la función y manejo de las plantas. Se registraron 165 especies correspondientes a 147 géneros y 70 familias de plantas vasculares. Las especies utilizadas en la medicina tradicional se agruparon en 13 clases o categorías de acuerdo con el tipo de enfermedad en que se utilizan. Las categorías de plantas medicinales que mostraron las mayores frecuencias de utilización se relacionan con el tratamiento de enfermedades del aparato digestivo, aparato respiratorio, enfermedades asociadas con la nutrición y sistema endócrino, además de las referidas como síndromes de filiación cultural.Las plantas medicinales se presentaron en dos diferentes hábitat; 45.4% son especies pertenecientes a la flora viaria y el 54.5% prosperan en agroecosistemas familiares, llamados localmente huertos o solares. Aproximadamente un tercio de las especies eran cultivadas y el resto silvestres. Tres cuartos de las especies presentan una distribución natural en América, y las demás han sido introducidas de ultramar. Los datos muestran que el mayor número de especies utilizadas para fines medicinales se encuentran en los huertos. Esto implica nuevos retos debido a que los huertos familiares tradicionales están siendo utilizados para fines diversos, como la construcción de viviendas o establecimientos comerciales, ocasionando pérdida de germoplasma in situ y en consecuencia pérdida de la biodiversidad en este territorio del subtrópico mexicano.

  17. The oldest gibbon fossil (Hylobatidae) from insular Southeast Asia: evidence from Trinil, (East Java, Indonesia), Lower/Middle Pleistocene.

    Science.gov (United States)

    Ingicco, Thomas; de Vos, John; Huffman, O Frank

    2014-01-01

    A fossil femur excavated by Eugène Dubois between 1891-1900 in the Lower/Middle Pleistocene bonebed of the Trinil site (Java, Indonesia) was recognised by us as that of a Hylobatidae. The specimen, Trinil 5703 of the Dubois Collection (Leiden, The Netherlands), has the same distinctive form of fossilization that is seen in many of the bonebed fossils from Trinil in the collection. Anatomical comparison of Trinil 5703 to a sample of carnivore and primate femora, supported by morphometric analyses, lead to the attribution of the fossil to gibbon. Trinil 5703 therefore provides the oldest insular record of this clade, one of the oldest known Hylobatidae fossils from Southeast Asia. Because living Hylobatidae only inhabit evergreen rain forests, the paleoenvironment within the river drainage in the greater Trinil area evidently included forests of this kind during the Lower/Middle Pleistocene as revealed here.

  18. Faunistic patterns of leaf beetles (Coleoptera, Chrysomelidae) within elevational and temporal gradients in Sierra de San Carlos, Mexico.

    Science.gov (United States)

    Sánchez-Reyes, Uriel Jeshua; Niño-Maldonado, Santiago; Barrientos-Lozano, Ludivina; Clark, Shawn M; Jones, Robert W

    2016-01-01

    The study of biodiversity of Chrysomelidae in Mexico and its variation within ecological gradients has increased recently, although important areas in the country remain to be explored. We conducted a faunistic inventory and analyzed the elevational and temporal variation of leaf beetle communities in the Sierra de San Carlos, in the state of Tamaulipas, in northeastern Mexico. This is an area with high to extreme priority for conservation, and due to its insular geographical position and to the vegetational communities present, it must be considered as a sky island. We selected seven sample sites distributed in different elevations within three localities, and comprising different vegetational communities. At each site, we randomly delimited 12 sample plots of 400 m(2) where sampling was conducted by entomological sweep netting and collecting directly by hand. Sampling was conducted monthly at each plot, for a total of 1,008 samples between February 2013 and January 2014. By the end of the study, we had obtained a total of 3,081 specimens belonging to six subfamilies, 65 genera, and 113 species, with Trichaltica scabricula (Crotch, 1873) being recorded for first time in Mexico. Species richness was less than the values observed at other studies conducted in the same region, which is attributed to differences in the number of plant species and to the insular location of Sierra de San Carlos; however, the higher diversity values suggest a higher quality of natural resources and vegetational communities. No consistent pattern of leaf beetle communities was correlated with elevation, although higher values of species richness and diversity were obtained at the highest elevation site. The seasonal gradient showed that the rainy season is most favorable for leaf beetle communities. We found that species composition was different between sites and months, and also that there exists a significant association between the abundance obtained at each site and particular

  19. Faunistic patterns of leaf beetles (Coleoptera, Chrysomelidae) within elevational and temporal gradients in Sierra de San Carlos, Mexico

    Science.gov (United States)

    Sánchez-Reyes, Uriel Jeshua; Niño-Maldonado, Santiago; Barrientos-Lozano, Ludivina; Clark, Shawn M.; Jones, Robert W.

    2016-01-01

    Abstract The study of biodiversity of Chrysomelidae in Mexico and its variation within ecological gradients has increased recently, although important areas in the country remain to be explored. We conducted a faunistic inventory and analyzed the elevational and temporal variation of leaf beetle communities in the Sierra de San Carlos, in the state of Tamaulipas, in northeastern Mexico. This is an area with high to extreme priority for conservation, and due to its insular geographical position and to the vegetational communities present, it must be considered as a sky island. We selected seven sample sites distributed in different elevations within three localities, and comprising different vegetational communities. At each site, we randomly delimited 12 sample plots of 400 m2 where sampling was conducted by entomological sweep netting and collecting directly by hand. Sampling was conducted monthly at each plot, for a total of 1,008 samples between February 2013 and January 2014. By the end of the study, we had obtained a total of 3,081 specimens belonging to six subfamilies, 65 genera, and 113 species, with Trichaltica scabricula (Crotch, 1873) being recorded for first time in Mexico. Species richness was less than the values observed at other studies conducted in the same region, which is attributed to differences in the number of plant species and to the insular location of Sierra de San Carlos; however, the higher diversity values suggest a higher quality of natural resources and vegetational communities. No consistent pattern of leaf beetle communities was correlated with elevation, although higher values of species richness and diversity were obtained at the highest elevation site. The seasonal gradient showed that the rainy season is most favorable for leaf beetle communities. We found that species composition was different between sites and months, and also that there exists a significant association between the abundance obtained at each site and

  20. Faunistic patterns of leaf beetles (Coleoptera, Chrysomelidae) within elevational and temporal gradients in Sierra de San Carlos, Mexico.

    Science.gov (United States)

    Sánchez-Reyes, Uriel Jeshua; Niño-Maldonado, Santiago; Barrientos-Lozano, Ludivina; Clark, Shawn M; Jones, Robert W

    2016-01-01

    The study of biodiversity of Chrysomelidae in Mexico and its variation within ecological gradients has increased recently, although important areas in the country remain to be explored. We conducted a faunistic inventory and analyzed the elevational and temporal variation of leaf beetle communities in the Sierra de San Carlos, in the state of Tamaulipas, in northeastern Mexico. This is an area with high to extreme priority for conservation, and due to its insular geographical position and to the vegetational communities present, it must be considered as a sky island. We selected seven sample sites distributed in different elevations within three localities, and comprising different vegetational communities. At each site, we randomly delimited 12 sample plots of 400 m(2) where sampling was conducted by entomological sweep netting and collecting directly by hand. Sampling was conducted monthly at each plot, for a total of 1,008 samples between February 2013 and January 2014. By the end of the study, we had obtained a total of 3,081 specimens belonging to six subfamilies, 65 genera, and 113 species, with Trichaltica scabricula (Crotch, 1873) being recorded for first time in Mexico. Species richness was less than the values observed at other studies conducted in the same region, which is attributed to differences in the number of plant species and to the insular location of Sierra de San Carlos; however, the higher diversity values suggest a higher quality of natural resources and vegetational communities. No consistent pattern of leaf beetle communities was correlated with elevation, although higher values of species richness and diversity were obtained at the highest elevation site. The seasonal gradient showed that the rainy season is most favorable for leaf beetle communities. We found that species composition was different between sites and months, and also that there exists a significant association between the abundance obtained at each site and particular

  1. Recensión del libro: "La Arquitectura Escolar en Cantabria. Análisis de la arquitectura escolar en el municipio de Castro Urdiales"

    OpenAIRE

    Francisco Javier RODRÍGUEZ MÉNDEZ

    2012-01-01

    Recensión del libro "La Arquitectura Escolar en Cantabria: Análisis de la arquitectura escolar en el municipio de Castro Urdiales" de la autora Victoria Cabieces Ibarrondo, publicado en 2011 en Santander por la Consejería de Educación, Cultura y Deporte de Cantabria (ISBN 9788495302533).

  2. Cuartel San Carlos. Yacimiento veterano

    Directory of Open Access Journals (Sweden)

    Mariana Flores

    2007-01-01

    Full Text Available El Cuartel San Carlos es un monumento histórico nacional (1986 de finales del siglo XVIII (1785-1790, caracterizado por sufrir diversas adversidades en su construcción y soportar los terremotos de 1812 y 1900. En el año 2006, el organismo encargado de su custodia, el Instituto de Patrimonio Cultural del Ministerio de Cultura, ejecutó tres etapas de exploración arqueológica, que abarcaron las áreas Traspatio, Patio Central y las Naves Este y Oeste de la edificación. Este trabajo reseña el análisis de la documentación arqueológica obtenida en el sitio, a partir de la realización de dicho proyecto, denominado EACUSAC (Estudio Arqueológico del Cuartel San Carlos, que representa además, la tercera campaña realizada en el sitio. La importancia de este yacimiento histórico, radica en su participación en los acontecimientos que propiciaron conflictos de poder durante el surgimiento de la República y en los sucesos políticos del siglo XX. De igual manera, se encontró en el sitio una amplia muestra de materiales arqueológicos que reseñan un estilo de vida cotidiana militar, así como las dinámicas sociales internas ocurridas en el San Carlos, como lugar estratégico para la defensa de los diferentes regímenes que atravesó el país, desde la época del imperialismo español hasta nuestros días.

  3. Carlos Restrepo. Un verdadero Maestro

    OpenAIRE

    Pelayo Correa

    2009-01-01

    Carlos Restrepo fue el primer profesor de Patología y un miembro ilustre del grupo de pioneros que fundaron la Facultad de Medicina de la Universidad del Valle. Estos pioneros convergieron en Cali en la década de 1950, en posesión de un espíritu renovador y creativo que emprendió con mucho éxito la labor de cambiar la cultura académica del Valle del Cauca. Ellos encontraron una sociedad apacible, que disfrutaba de la generosidad de su entorno, sin deseos de romper las tradiciones centenarias...

  4. San Carlos: Un modelo de conexión social en medio de la violencia

    Directory of Open Access Journals (Sweden)

    Héctor Fabio Guerrero Berrío

    2015-12-01

    Full Text Available El presente ensayo analiza la dinámica que ha tenido el conflicto armado en el municipio de San Carlos, Antioquía, durante la última década del siglo XX hasta la actualidad. Específicamente, analiza los daños morales, psicológicos y políticos que han generado las masacres de las veredas El Chocó y Dos Quebradas, así como las acciones de resistencia social que ha realizado la comunidad para la construcción de una nueva realidad a pesar de la violencia. Lo anterior sugiere la importancia de comprender el ejercicio de reflexión ética y de la memoria que han realizado las víctimas para configurar lo que, de acuerdo a la óptica de Iris Young, se denominaría un modelo de conexión social, y que les ha permitido asumir responsabilidades colectivas  para hacer frente a las injusticias estructurales que han padecido.

  5. Monte Carlo techniques in radiation therapy

    CERN Document Server

    Verhaegen, Frank

    2013-01-01

    Modern cancer treatment relies on Monte Carlo simulations to help radiotherapists and clinical physicists better understand and compute radiation dose from imaging devices as well as exploit four-dimensional imaging data. With Monte Carlo-based treatment planning tools now available from commercial vendors, a complete transition to Monte Carlo-based dose calculation methods in radiotherapy could likely take place in the next decade. Monte Carlo Techniques in Radiation Therapy explores the use of Monte Carlo methods for modeling various features of internal and external radiation sources, including light ion beams. The book-the first of its kind-addresses applications of the Monte Carlo particle transport simulation technique in radiation therapy, mainly focusing on external beam radiotherapy and brachytherapy. It presents the mathematical and technical aspects of the methods in particle transport simulations. The book also discusses the modeling of medical linacs and other irradiation devices; issues specific...

  6. Monte Carlo primer for health physicists

    International Nuclear Information System (INIS)

    The basic ideas and principles of Monte Carlo calculations are presented in the form of a primer for health physicists. A simple integral with a known answer is evaluated by two different Monte Carlo approaches. Random number, which underlie Monte Carlo work, are discussed, and a sample table of random numbers generated by a hand calculator is presented. Monte Carlo calculations of dose and linear energy transfer (LET) from 100-keV neutrons incident on a tissue slab are discussed. The random-number table is used in a hand calculation of the initial sequence of events for a 100-keV neutron entering the slab. Some pitfalls in Monte Carlo work are described. While this primer addresses mainly the bare bones of Monte Carlo, a final section briefly describes some of the more sophisticated techniques used in practice to reduce variance and computing time

  7. Monte Carlo Treatment Planning for Advanced Radiotherapy

    DEFF Research Database (Denmark)

    Cronholm, Rickard

    for commissioning of a Monte Carlo model of a medical linear accelerator, ensuring agreement with measurements within 1% for a range of situations, is presented. The resulting Monte Carlo model was validated against measurements for a wider range of situations, including small field output factors, and agreement...... modulating the intensity of the field during the irradiation. The workflow described has the potential to fully model the dynamic delivery, including gantry rotation during irradiation, of modern radiotherapy. Three corner stones of Monte Carlo Treatment Planning are identified: Building, commissioning...... and validation of a Monte Carlo model of a medical linear accelerator (i), converting a CT scan of a patient to a Monte Carlo compliant phantom (ii) and translating the treatment plan parameters (including beam energy, angles of incidence, collimator settings etc) to a Monte Carlo input file (iii). A protocol...

  8. Bacterias fijadoras asimbióticas de nitrógeno de la zona agrícola de San Carlos. Córdoba, Colombia

    OpenAIRE

    Lara Mantilla Cecilia; Villalba Anaya Mara; Oviedo Zumaqué Luis Eliécer

    2007-01-01

    Se aislaron bacterias diazotróficas de los géneros Azotobacter sp y Azospirrillum sp a partir de la rizosfera de cultivos de plátano, pastos, maíz y de rastrojos (zonas sin cultivar) en el municipio de San Carlos (Valle del Sinú medio en el departamento de Córdoba, Colombia). Las poblaciones microbianas se identificaron mediante pruebas bioquímicas y observación macroscópica y microscópica con tinción de Gram en diferentes medios de cultivo: a) Burk´s, Asbhy y Jensen´s, (género Azotobacter sp...

  9. Mean field simulation for Monte Carlo integration

    CERN Document Server

    Del Moral, Pierre

    2013-01-01

    In the last three decades, there has been a dramatic increase in the use of interacting particle methods as a powerful tool in real-world applications of Monte Carlo simulation in computational physics, population biology, computer sciences, and statistical machine learning. Ideally suited to parallel and distributed computation, these advanced particle algorithms include nonlinear interacting jump diffusions; quantum, diffusion, and resampled Monte Carlo methods; Feynman-Kac particle models; genetic and evolutionary algorithms; sequential Monte Carlo methods; adaptive and interacting Marko

  10. Guía estructurada bajo modelo Escuela Nueva para la enseñanza de Física en el grado quinto (5°) de la escuela rural de Matanzas de la Institución Educativa Carlos Ramón Repizo Cabrera

    OpenAIRE

    Córdoba Claros , Zoila Piedad

    2013-01-01

    Esta investigación, busca que las Instituciones Educativas inicien la enseñanza y aprendizaje de la Física como asignatura independiente de las Ciencias Naturales a los estudiantes de Básica Primaria; para tal caso se elaboró una cartilla de Física para el grado quinto de la Escuela Rural de Matanzas de la Institución Educativa Carlos Ramón Repizo ubicada en el municipio de San Agustín del departamento del Huila, que contiene guías diseñadas bajo el Modelo Escuela nueva. En consecuencia a...

  11. Multidimensional stochastic approximation Monte Carlo.

    Science.gov (United States)

    Zablotskiy, Sergey V; Ivanov, Victor A; Paul, Wolfgang

    2016-06-01

    Stochastic Approximation Monte Carlo (SAMC) has been established as a mathematically founded powerful flat-histogram Monte Carlo method, used to determine the density of states, g(E), of a model system. We show here how it can be generalized for the determination of multidimensional probability distributions (or equivalently densities of states) of macroscopic or mesoscopic variables defined on the space of microstates of a statistical mechanical system. This establishes this method as a systematic way for coarse graining a model system, or, in other words, for performing a renormalization group step on a model. We discuss the formulation of the Kadanoff block spin transformation and the coarse-graining procedure for polymer models in this language. We also apply it to a standard case in the literature of two-dimensional densities of states, where two competing energetic effects are present g(E_{1},E_{2}). We show when and why care has to be exercised when obtaining the microcanonical density of states g(E_{1}+E_{2}) from g(E_{1},E_{2}). PMID:27415383

  12. 1-D EQUILIBRIUM DISCRETE DIFFUSION MONTE CARLO

    Energy Technology Data Exchange (ETDEWEB)

    T. EVANS; ET AL

    2000-08-01

    We present a new hybrid Monte Carlo method for 1-D equilibrium diffusion problems in which the radiation field coexists with matter in local thermodynamic equilibrium. This method, the Equilibrium Discrete Diffusion Monte Carlo (EqDDMC) method, combines Monte Carlo particles with spatially discrete diffusion solutions. We verify the EqDDMC method with computational results from three slab problems. The EqDDMC method represents an incremental step toward applying this hybrid methodology to non-equilibrium diffusion, where it could be simultaneously coupled to Monte Carlo transport.

  13. Cooperación entre municipios y tercer sector en políticas sociales: mitos y realidades

    Directory of Open Access Journals (Sweden)

    Alejandro Navarro Arredondo

    2013-01-01

    Full Text Available El objetivo del artículo es analizar las percepciones de las organizaciones de la sociedad civil (OSC acerca de sus interacciones con municipios en el diseño, ejecución y evaluación de políticas sociales. En la primera sección se abordan las dimensiones teóricas y contextuales sobre la relación entre el tercer sector y el gobierno. En la segunda se describe el marco legal para el funcionamiento de las OSC en el ámbito local. En la tercera, se analiza una encuesta diseñada a partir de las dimensiones planteadas. Por último, se formulan algunas conclusiones e interrogantes para el desarrollo de futuras investigaciones.

  14. Diagnóstico de competitividad del sector productor de arracacha. Caso municipio de Boyacá (Colombia 2014

    Directory of Open Access Journals (Sweden)

    Diana Lizeth Rojas Cruz

    2016-07-01

    Full Text Available El presente artículo analiza las condiciones de competitividad del sector productor de arracacha en el municipio de Boyacá y su influencia en dicho territorio. Para ello, se emplean los modelos “cinco fuerzas” y “diamante de competitividad” desarrollados por el profesor Michael Porter. Los resultados obtenidos permitieron establecer un diagnóstico cualitativo sobre la situación actual y las perspectivas de la cadena, dilucidándose factores clave que deben intervenirse en pro de propuestas generadoras de valor y oportunidades encaminadas a la construcción de alternativas en el área agroindustrial, que faciliten el acceso a nuevos mercados y provean, tanto crecimiento sostenible para la región, como mejor calidad de vida para los agricultores.

  15. El Complejo de Cambio en Suelos del Municipio de Marinilla [Antioquia] según el Método de Brown

    Directory of Open Access Journals (Sweden)

    Galiano S. Francisco

    1959-12-01

    Full Text Available Se estudió el complejo de cambio en suelos aluviales recientes, terrazas medias y terrazas altas del Municipio de Marinilla por el método rápido de Brown. El grado de saturación, bajo en todos ellos, se acentúa en los suelos de las terrazas más antiguas y nos indica el bajo nivel de fertilidad de estos suelos. La extracción del hidrógeno de cambio con acetato cálcico coincide con la que efectúa el acetato amónico, excepto para los suelos más ricos en materia orgánica con los que proporciona resultados más altos la solución extractora de acetato cálcico.

  16. Caracterización de la Violencia Intrafamiliar en mujeres del municipio Santa Ana. Beni Bolivia Junio-Diciembre 2010.

    Directory of Open Access Journals (Sweden)

    Yacquelynes Corona-Hechavarria

    2013-01-01

    Full Text Available Abordó una investigación descriptiva en municipio Santa Ana, Beni en Bolivia para determinar el comportamiento de las mujeres que sufren violencia intrafamiliar en el 2010. Los datos se obtuvieron mediante la revisión de las fichas familiares e individuales, se realizaron encuestas directas a las mujeres que sufrían violencia intrafamiliar. Se concluyo que el grupo de edad más afectado fue el de 25-34, con nivel de escolaridad secundaria, predominaron las amas de casa, se encontraron pacientes que reconocían sufrir algún tipo de violencia, las causas más frecuentes fueron los celos y el alcoholismo. Se recomendó continuar la investigación para lograr un incremento del conocimiento sobre la violencia intrafamiliar en la mujer.

  17. Caracterización del estado de la biodiversidad en el municipio Guamá, Santiago de Cuba

    OpenAIRE

    2010-01-01

    Se ofrece una compilación de los materiales existentes sobre el status de la biodiversidad del municipio Guamá. Las principales problemáticas ambientales son: la antropización producto de migraciones incontroladas de la población hacia las áreas próximas a la línea de costa, vertimientos de desechos sólidos y líquidos en playas y ríos, deficiente red de alcantarillado, presencia de 14 despulpadoras de café, fragmentación de hábitat, la deforestación, erosión de los suelos e introd...

  18. Impacto de las cartas de servicio en los empleados del área deportiva de mancomunidades de municipios de Extremadura

    Directory of Open Access Journals (Sweden)

    Alberto Bl\\u00E1zquez Manzano

    2013-01-01

    Full Text Available El objetivo del estudio fue conocer el impacto de las cartas de servicios para los empleados del área deportiva de mancomunidades de municipios extremeñas. Participaron 114 dinamizadores deportivos y 29 gerentes. Se analizaron los beneficiarios, dificultad en elaboración, aplicación y utilidad de las cartas de servicios; así como la concordancia entre la opinión de empleados sobre elementos y finalidades que deben centrar las acciones de calidad y lo expresado en dicho documento. Los resultados reflejan alineamiento relativo en la opinión de empleados entre sí y alta divergencia con el perfil de los indicadores que recogen las cartas de servicios. La utilidad del documento tiene alta valoración, mientras que el beneficio para destinatarios, dificultad de elaboración y aplicación, es media.

  19. Tentativas de suicidio en el municipio de Valencia: evolución y distribución urbana.

    Directory of Open Access Journals (Sweden)

    J Gimeno Adelantado

    1993-01-01

    Full Text Available Se analizan las tentativas de suicidio registradas en los hospitales públicos del municipio de Valencia desde 1982 a 1985. La evolución temporal indica un mantenimiento de las tasas anuales, con un incremento relativo de la proporción de hombres y de los intervalos de edad de 15 a 29 y más de 60. La sobredosis de medicamentos tiende a disminuir, así como los ingresos, tanto en sala como en UCI. La distribución urbana revela la existencia de tres áreas de alto riesgo barrios "artificiales" creados por decisiones administrativas, barrios socialmente conflictivos, con tasas altas de delincuencia y drogadicción; y barrios de acogida de población inmigrante. En conjunto las tasas estandardizadas de tentativas presentan correlaciones significativas con todos los indicadores de deprivación social analizados.

  20. Percepción del riesgo de inundaciones en municipios litorales alicantinos: ¿aumento de la vulnerabilidad?

    Directory of Open Access Journals (Sweden)

    Antonio M. Rico Amorós

    2010-01-01

    Full Text Available Durante las dos últimas décadas, el litoral alicantino ha registrado un fuerte incremento de la vulnerabilidad a los fenómenos de inundación como consecuencia del aumento a la exposición física a los mismos, propiciada por la expansión de nuevas áreas residenciales urbano-turísticas. En este artículo, se analiza la percepción social de las inundaciones, valorando las variables de resistencia y resiliencia frente a este riesgo natural. Para ello, se ofrecen los resultados de las encuestas de percepción llevadas a cabo a la población permanente y estacional afectada por las inundaciones en municipios litorales alicantinos.

  1. Estudio léxico en el corregimiento de Boraudo: municipio de Lloró, Chocó

    OpenAIRE

    Gómez Figueroa, Fabio Alirio

    2014-01-01

    En el presente estudio, se identifican y analizan algunas variables léxicas evidentes en las conversaciones espontáneas y libres de los habitantes del corregimiento de Boraudo, municipio de Lloró Chocó. En el desarrollo del estudio que se ofrece se tuvo en cuenta la categorización léxica de varios campos semánticos tales como: léxico sobre la minería artesanal; la pesca artesanal en ríos y riachuelos; navegación en el río Atrato; léxico sobre la alimentación campesina; léxico sobre prendas de...

  2. LAS CADENAS PRODUCTIVAS, ESTRATEGIA DE DESARROLLO EMPRESARIAL PARA EL MUNICIPIO DE TAMUÍN, SAN LUIS POTOSÍ

    Directory of Open Access Journals (Sweden)

    Ana Diana Betancourt Enríquez

    2013-08-01

    Full Text Available El presente artículo tiene como principal objetivo el análisis del esquema de cadena productiva, como estrategia para el desarrollo competitivo empresarial del municipio de Tamuín, S.L.P., aunado al caso del Grupo Gusi Sociedad de Producción Rural de Responsabilidad Limitada de esta localidad. En la investigación se presentan lineamientos teóricos que incluyen la conceptualización de la cadena productiva, clasificación de la misma, ventajas de integración del esquema, y rubros de lo local a lo global, donde se incorpora un acercamiento sobre el modelo endógeno dentro de la integración de las cadenas productivas.

  3. Tendencias organizativas y tipos de poder en doce líderes del municipio de San Gil, Santander

    Directory of Open Access Journals (Sweden)

    Wilmer Hernández-Velandia

    2016-09-01

    Full Text Available El presente artículo da a conocer los resultados de la investigación basada en la recuperación etnográfica de los discursos de doce líderes sociales, culturales y de partidos políticos en el municipio de San Gil, Santander, en el marco de las Elecciones Legislativas de 2010 en Colombia. Se logran distinguir dos propuestas así: se identifican dos tendencias organizativas, una partidista y otra de autonomía social, cada una con interpretaciones distintas sobre problemas, propuestas de solución, roles y conceptos base; de otro lado, se deducen dos tipos de poder, uno representativo y otro diversificante, explicando la manera como éstos se fortalecen o debilitan en una u otra tendencia organizativa.

  4. Atlas digital: uma contribuicao para o sistema de informacoes do municipio de Sao Joao de Meriti – RJ

    Directory of Open Access Journals (Sweden)

    Ricardo Araujo Mathias

    2011-07-01

    Full Text Available Um Atlas Digital é um atlas que pode ser acessado atraves de um computador, sendo possivel a utilizacao de uma variada gama de temas, formatos e escalas. Neste trabalho apresenta-se um prototipo de Atlas Digital como colaboracao ao Sistema de Informacao Municipal – SIM, para o municipio de Sao João de Meriti, RJ. O SIM tem como meta os servicos municipais, sendo as suas informacoes fundamentais para a melhoria da gestao das prefeituras. A pesquisa foi direcionada para o tema da habitabilidade, que consiste num conjunto de condicoes voltadas para a criacao de um habitat saudavel, conseguinte foram trabalhados os subtemas: infraestrutura de abastecimento de agua, esgoto, coleta de lixo, saude e educacao.

  5. Prevalencia de Blastocystis hominis en vendedores ambulantes de comida del municipio Caroní, Estado Bolívar, Venezuela

    Directory of Open Access Journals (Sweden)

    Requena Ixora

    2003-01-01

    Full Text Available Para determinar la prevalencia de Blastocystis hominis en una muestra de vendedores ambulantes de comida, aparentemente sanos, se realizó un estudio seccional con 415 personas que acudieron al Ambulatorio Urbano tipo III "Manoa" (Municipio Caroní, Estado Bolívar, Venezuela, Programa de Higiene del Adulto, a solicitar el certificado de salud para trabajar como vendedores de comida. Una muestra de heces obtenida por evacuación espontánea fue analizada mediante la técnica de examen directo y método de concentración de Willis. Se encontraron 150 personas parasitadas (36,14%, de ellas 107 (25,78% con B. hominis. No se observó predilección por el sexo (p > 0,05, pero sí con relación a la edad, siendo las personas de 18 a 27 años las más afectados (ji² = 12,17; g.l. = 4. En el 71,02% de los casos se encontró como parásito único y en 28,98% de los casos asociados a otros parásitos, siendo el más frecuentemente asociado Giardia lamblia (2,41%. En la mayoría de las personas parasitadas (85% el protozoario se observó en un número menor de cinco células por campo. Se concluye que B. hominis es un parásito frecuente en manipuladores de alimentos del Municipio Caroní, Estado Bolívar, Venezuela.

  6. Municipio, identidad cultural y comunidades indígenas. El caso huarpe en el noreste de Mendoza

    Directory of Open Access Journals (Sweden)

    Leticia Saldi

    2013-06-01

    Full Text Available En el presente artículo analizamos cómo funcionarios de la Municipalidad de Lavalle representan e interpelan a las comunidades indígenas huarpe situadas en el área no irrigada del noreste de Mendoza, área situada en el departamento de Lavalle. Éste se encuentra dividido socioterritorialmente en dos espacios. Uno irrigado, caracterizado como área de progreso, de producción agrícola y de herencia europea y el otro no irrigado, representado como área de atraso, de producción ganadera y de herencia precolonial. A partir de un análisis etnográfico, analizamos cómo el municipio gestiona local y cotidianamente la diversidad étnica, cultural, económica y política. Concluimos que las formas con que los funcionarios interpelan a las comunidades indígenas y a sus integrantes son en base a un doble movimiento, uno de reconocimiento explícito y el otro de individualización, invisibilización y deslegitimación hacia las mismas. Al invisibilizar a las comunidades como sujetos colectivos, funcionarios municipales intentan dar una identidad común que incorpore a los espacios irrigados y no irrigados y a sus poblaciones como pertenecientes a un mismo territorio, el departamental, a la vez que mantenga la jerarquización entre ambos. Al realizar este movimiento, el municipio se erige como el unificador y contenedor de ambos espacios y de los distintos grupos socio-étnicos que los integran.

  7. Prevalencia de Blastocystis hominis en vendedores ambulantes de comida del municipio Caroní, Estado Bolívar, Venezuela

    Directory of Open Access Journals (Sweden)

    Ixora Requena

    2003-12-01

    Full Text Available Para determinar la prevalencia de Blastocystis hominis en una muestra de vendedores ambulantes de comida, aparentemente sanos, se realizó un estudio seccional con 415 personas que acudieron al Ambulatorio Urbano tipo III "Manoa" (Municipio Caroní, Estado Bolívar, Venezuela, Programa de Higiene del Adulto, a solicitar el certificado de salud para trabajar como vendedores de comida. Una muestra de heces obtenida por evacuación espontánea fue analizada mediante la técnica de examen directo y método de concentración de Willis. Se encontraron 150 personas parasitadas (36,14%, de ellas 107 (25,78% con B. hominis. No se observó predilección por el sexo (p > 0,05, pero sí con relación a la edad, siendo las personas de 18 a 27 años las más afectados (ji² = 12,17; g.l. = 4. En el 71,02% de los casos se encontró como parásito único y en 28,98% de los casos asociados a otros parásitos, siendo el más frecuentemente asociado Giardia lamblia (2,41%. En la mayoría de las personas parasitadas (85% el protozoario se observó en un número menor de cinco células por campo. Se concluye que B. hominis es un parásito frecuente en manipuladores de alimentos del Municipio Caroní, Estado Bolívar, Venezuela.

  8. Single Neurons in the Insular Cortex of a Macaque Monkey Respond to Skin Brushing: Preliminary Data of the Possible Representation of Pleasant Touch

    OpenAIRE

    Grandi, Laura Clara; Gerbella, Marzio

    2016-01-01

    Pleasant touch may serve as a foundation for affiliative behavior, providing a mechanism for the formation and maintenance of social bonds among conspecifics. In humans, this touch is usually referred to as the caress. Dynamic caressing performed on the hairy skin with a velocity of 1–10 cm/s is perceived as being pleasant and determines positive cardio-physiological effects. Furthermore, imaging human studies show that affiliative touch activates the posterior insular cortex (pIC). Recently,...

  9. Single neurons in the insular cortex of a macaque monkey respond to skin brushing: preliminary data of the possible representation of pleasant touch

    OpenAIRE

    Laura Clara Grandi; Marzio eGerbella

    2016-01-01

    Pleasant touch may serve as a foundation for affiliative behavior, providing a mechanism for the formation and maintenance of social bonds among conspecifics. In humans, this touch is usually referred to as the caress. Dynamic caressing performed on the hairy skin with a velocity of 1–10 cm/sec is perceived as being pleasant and determines positive cardio-physiological effects. Furthermore, imaging human studies show that affiliative touch activates the posterior insular cortex.Recently, it w...

  10. Mepraia spinolai in the Southeastern Pacific Ocean Coast (Chile) - First insular record and feeding pattern on the Pan de Azúcar Island

    OpenAIRE

    Hernán Sagua Franco; Jorge Araya Rojas; Jorge González Cortes; Iván Neira Cortes

    2000-01-01

    In a field collection performed at Pan de Azúcar Island in Northern Chile, 95 specimens representing all instars of Mepraia spinolai were collected. The intestinal contents of 55 specimens were examined for Trypanosoma cruzi infection and were found to be negative. This is the first record of an insular habitat for M. spinolai, where the insects had fed mainly on seabirds (78%), some on marine mammals (5%), and some on reptiles (7%).

  11. Mepraia spinolai in the Southeastern Pacific Ocean Coast (Chile - First insular record and feeding pattern on the Pan de Azúcar Island

    Directory of Open Access Journals (Sweden)

    Hernán Sagua Franco

    2000-04-01

    Full Text Available In a field collection performed at Pan de Azúcar Island in Northern Chile, 95 specimens representing all instars of Mepraia spinolai were collected. The intestinal contents of 55 specimens were examined for Trypanosoma cruzi infection and were found to be negative. This is the first record of an insular habitat for M. spinolai, where the insects had fed mainly on seabirds (78%, some on marine mammals (5%, and some on reptiles (7%.

  12. El lenguaje de Carlos Alonso

    Directory of Open Access Journals (Sweden)

    Bárbara Bustamante

    2005-10-01

    Full Text Available El talento de Carlos Alonso (Argentina, 1929 ha logrado conquistar un lenguaje con estilo propio. La creación de dibujos, pinturas, pasteles y tintas, collages y grabados fijaron en el campo visual la proyección de su subjetividad. Tanto la imagen como la palabra explicitan una visión crítica de la realidad, que tensiona al espectador obligándolo a una condición reflexiva y comprometida con el mensaje; este es el aspecto más destacado por los historiadores del arte. Sin embargo, la presente investigación pretende focalizar aspectos icónicos y plásticos de su hacer.

  13. Monte Carlo lattice program KIM

    International Nuclear Information System (INIS)

    The Monte Carlo program KIM solves the steady-state linear neutron transport equation for a fixed-source problem or, by successive fixed-source runs, for the eigenvalue problem, in a two-dimensional thermal reactor lattice. Fluxes and reaction rates are the main quantities computed by the program, from which power distribution and few-group averaged cross sections are derived. The simulation ranges from 10 MeV to zero and includes anisotropic and inelastic scattering in the fast energy region, the epithermal Doppler broadening of the resonances of some nuclides, and the thermalization phenomenon by taking into account the thermal velocity distribution of some molecules. Besides the well known combinatorial geometry, the program allows complex configurations to be represented by a discrete set of points, an approach greatly improving calculation speed

  14. General Monte Carlo code MONK

    International Nuclear Information System (INIS)

    The Monte Carlo code MONK is a general program written to provide a high degree of flexibility to the user. MONK is distinguished by its detailed representation of nuclear data in point form i.e., the cross-section is tabulated at specific energies instead of the more usual group representation. The nuclear data are unadjusted in the point form but recently the code has been modified to accept adjusted group data as used in fast and thermal reactor applications. The various geometrical handling capabilities and importance sampling techniques are described. In addition to the nuclear data aspects, the following features are also described; geometrical handling routines, tracking cycles, neutron source and output facilities. 12 references. (U.S.)

  15. Distortion of time interval reproduction in an epileptic patient with a focal lesion in the right anterior insular/inferior frontal cortices.

    Science.gov (United States)

    Monfort, Vincent; Pfeuty, Micha; Klein, Madelyne; Collé, Steffie; Brissart, Hélène; Jonas, Jacques; Maillard, Louis

    2014-11-01

    This case report on an epileptic patient suffering from a focal lesion at the junction of the right anterior insular cortex (AIC) and the adjacent inferior frontal cortex (IFC) provides the first evidence that damage to this brain region impairs temporal performance in a visual time reproduction task in which participants had to reproduce the presentation duration (3, 5 and 7s) of emotionally-neutral and -negative pictures. Strikingly, as compared to a group of healthy subjects, the AIC/IFC case considerably overestimated reproduction times despite normal variability. The effect was obtained in all duration and emotion conditions. Such a distortion in time reproduction was not observed in four other epileptic patients without insular or inferior frontal damage. Importantly, the absolute extent of temporal over-reproduction increased in proportion to the magnitude of the target durations, which concurs with the scalar property of interval timing, and points to an impairment of time-specific rather than of non temporal (such as motor) mechanisms. Our data suggest that the disability in temporal reproduction of the AIC/IFC case would result from a distorted memory representation of the encoded duration, occurring during the process of storage and/or of recovery from memory and leading to a deviation of the temporal judgment during the reproduction task. These findings support the recent proposal that the anterior insular/inferior frontal cortices would be involved in time interval representation. PMID:25223467

  16. Distinctive roles of 5-Aza-2′-deoxycytidine in Anterior Agranular Insular and Basolateral Amygdala in Reconsolidation of aversive memory associated with Morphine in Rats

    Directory of Open Access Journals (Sweden)

    Peng eLiu

    2016-03-01

    Full Text Available 5-aza-2-deoxycytidine (5-aza, an inhibitor of DNA methyltransferases (DNMTs, has been implicated in aversive memory and the function of brain region which processing affect. However, little is known about the role of 5-aza in the reconsolidation of opiate withdrawal memory. In the present study, using the morphine-naloxone induced conditioned place aversion (CPA model in rats, we injected 5-aza into agranular insular (AI, granular insular (GI, basolateral amygdala (BLA and central amygdala (CeA immediately after the memory retrieval and tested the behavioral consequences at 24hours, 7 days and 14days after retrieval test. We found that 5-aza injection into AI disrupted the reconsolidation of morphine-associated withdrawal memory, but 5-aza injection into GI had no impact on the reconsolidation. Meanwhile, 5-aza injection into BLA but not CeA attenuated the withdrawal memory trace 14 days later. However, 5-aza administration to rats, in the absence of memory reactivation, had no effect on morphine-associated withdrawal memory. These findings suggest that 5-aza interfere with the reconsolidation of opiate withdrawal memory, and the roles of insular and amygdala in reconsolidation are distinctive.

  17. Challenges of Monte Carlo Transport

    Energy Technology Data Exchange (ETDEWEB)

    Long, Alex Roberts [Los Alamos National Lab. (LANL), Los Alamos, NM (United States). Computational Physics and Methods (CCS-2)

    2016-06-10

    These are slides from a presentation for Parallel Summer School at Los Alamos National Laboratory. Solving discretized partial differential equations (PDEs) of interest can require a large number of computations. We can identify concurrency to allow parallel solution of discrete PDEs. Simulated particles histories can be used to solve the Boltzmann transport equation. Particle histories are independent in neutral particle transport, making them amenable to parallel computation. Physical parameters and method type determine the data dependencies of particle histories. Data requirements shape parallel algorithms for Monte Carlo. Then, Parallel Computational Physics and Parallel Monte Carlo are discussed and, finally, the results are given. The mesh passing method greatly simplifies the IMC implementation and allows simple load-balancing. Using MPI windows and passive, one-sided RMA further simplifies the implementation by removing target synchronization. The author is very interested in implementations of PGAS that may allow further optimization for one-sided, read-only memory access (e.g. Open SHMEM). The MPICH_RMA_OVER_DMAPP option and library is required to make one-sided messaging scale on Trinitite - Moonlight scales poorly. Interconnect specific libraries or functions are likely necessary to ensure performance. BRANSON has been used to directly compare the current standard method to a proposed method on idealized problems. The mesh passing algorithm performs well on problems that are designed to show the scalability of the particle passing method. BRANSON can now run load-imbalanced, dynamic problems. Potential avenues of improvement in the mesh passing algorithm will be implemented and explored. A suite of test problems that stress DD methods will elucidate a possible path forward for production codes.

  18. Challenges of Monte Carlo Transport

    Energy Technology Data Exchange (ETDEWEB)

    Long, Alex Roberts [Los Alamos National Lab. (LANL), Los Alamos, NM (United States). Computational Physics and Methods (CCS-2)

    2016-06-10

    These are slides from a presentation for Parallel Summer School at Los Alamos National Laboratory. Solving discretized partial differential equations (PDEs) of interest can require a large number of computations. We can identify concurrency to allow parallel solution of discrete PDEs. Simulated particles histories can be used to solve the Boltzmann transport equation. Particle histories are independent in neutral particle transport, making them amenable to parallel computation. Physical parameters and method type determine the data dependencies of particle histories. Data requirements shape parallel algorithms for Monte Carlo. Then, Parallel Computational Physics and Parallel Monte Carlo are discussed and finally the results are given. The mesh passing method greatly simplifies the IMC implementation and allows simple load-balancing. Using MPI windows and passive, one-sided RMA further simplifies the implementation by removing target synchronization. The author is very interested in implementations of PGAS that may allow further optimization for one-sided, read-only memory access (e.g. Open SHMEM). The MPICH_RMA_OVER_DMAPP option and library is required to make one-sided messaging scale on Trinitite - Moonlight scales poorly. Interconnect specific libraries or functions are likely necessary to ensure performance. BRANSON has been used to directly compare the current standard method to a proposed method on idealized problems. The mesh passing algorithm performs well on problems that are designed to show the scalability of the particle passing method. BRANSON can now run load-imbalanced, dynamic problems. Potential avenues of improvement in the mesh passing algorithm will be implemented and explored. A suite of test problems that stress DD methods will elucidate a possible path forward for production codes.

  19. Carlos Restrepo. Un verdadero Maestro

    Directory of Open Access Journals (Sweden)

    Pelayo Correa

    2009-12-01

    Full Text Available Carlos Restrepo fue el primer profesor de Patología y un miembro ilustre del grupo de pioneros que fundaron la Facultad de Medicina de la Universidad del Valle. Estos pioneros convergieron en Cali en la década de 1950, en posesión de un espíritu renovador y creativo que emprendió con mucho éxito la labor de cambiar la cultura académica del Valle del Cauca. Ellos encontraron una sociedad apacible, que disfrutaba de la generosidad de su entorno, sin deseos de romper las tradiciones centenarias de estilo de vida sencillo y satisfecho. Cuando los hijos tenían el deseo y la capacidad de seguir estudios universitarios, especialmente en el área de la medicina, la familia los enviaba a climas menos cálidos, que supuestamente favorecían la función cerebral y la acumulación de conocimientos. Los pioneros de la educación médica en el Valle del Cauca, en buena parte reclutados en universidades nacionales y extranjeras, sabían muy bien que el ambiente vallecaucano no impide una formación universitaria de primera clase. Carlos Restrepo era prototipo del espíritu de cambio y formación intelectual de las nuevas generaciones. Lo manifestaba de múltiples maneras, en buena parte con su genio alegre, extrovertido, optimista, de risa fácil y contagiosa. Pero esta fase amable de su personalidad no ocultaba su tarea formativa; exigía de sus discípulos dedicación y trabajo duro, con fidelidad expresados en memorables caricaturas que exageraban su genio ocasionalmente explosivo. El grupo de pioneros se enfocó con un espíritu de total entrega (tiempo completo y dedicación exclusiva y organizó la nueva Facultad en bien definidos y estructurados departamentos: Anatomía, Bioquímica, Fisiología, Farmacología, Patología, Medicina Interna, Cirugía, Obstetricia y Ginecología, Psiquiatría y Medicina Preventiva. Los departamentos integraron sus funciones primordiales en la enseñanza, la investigación y el servicio a la comunidad. El centro

  20. Estudio eco-epidemiológico de la tripanosomiasis americana en el municipio de Amalfi (Antioquia

    Directory of Open Access Journals (Sweden)

    J. Arboleda

    2000-02-01

    Full Text Available

    El departamento de Antioquia no ha sido considerado endémico para la enfermedad de Chagas, sin embargo en el nordeste antioqueño, probablemente ocasionado por la tala y quema excesivas y la creciente deforestación para establecer medios de producción agrícola y ganadera, en las áreas naturales, se ha observado la aparición de insectos triatominos al interior de viviendas rurales, alimentándose de sus habitantes.

    Esta situación motivó la realización de un estudio ecoepidemiológico de Tripanosomiasis americana en nueve veredas del municipio de Amalfi con el propósito de identificar las especies de triatominos presentes en la zona, el grado de domiciliación, el índice de infección natural por Trypanosoma cruzi, los porcentajes de infección de animales domésticos (caninos y de mamíferos silvestres, la determinación de la seroprevalencia humana y finalmente la identificación de las acciones del hombre que están llevando a los triatominos a las viviendas para refugio y alimentación.

    En las veredas estudiadas se capturaron 196 triatominos, consideradas especies silvestres: Panstrongylus geniculatus (49%, P. rufotuberculatus (47% y Triatoma dispar (3%. El índice de infestación domiciliaria fue 14.53 % y las veredas con mayor infestación fueron Montebello (32.73 % y La Gardenia (27.5 %.

    Igualmente teniendo en cuenta el total de insectos infectados naturalmente por T. cruzi, fueron estas dos veredas las que obtuvieron el mayor porcentaje de infección 43.75 % y 25.0 % respectivamente.

    En viviendas de la vereda La Gardenia se hallaron huevos y ninfas de P

  1. 经侧裂入路切除岛叶海绵状血管畸形%Surgical resection of insular cavernomas with a transsylvian approach

    Institute of Scientific and Technical Information of China (English)

    王峰; 刘阳; 刘诤; 宋子木; 李宗正; 孙涛

    2014-01-01

    Objective To explore the surgical strategy for insular cavernous malformations (CMs).Methods Between Dec.2007 and Aug.2013,4 patients with insular CMs were treated surgically through transsylvian approach by using image guidance system (neuronavigation in two cases,ultrasound in four cases).Results The seizure was the initial symptom in 4 patients with insular CMs.The image guidance system provided high-quality intraoperative imaging and guided the perfect operative approach of insular cortex dissection.All CMs were completely removed via transsylvian-transinsular approach.The mean follow-up period was 36.75 months (ranged from 3 to 72 months).Permanent neurologic morbidity after surgery was observed in 1 patient.One patient with dominant hemisphere lesion had temporary dysphonia,and the language function was recovered after 1 week.4 patients were Engel class Ⅰ.Conclusions Surgical resection of insular CMs through transsylvian approach was safe.Neuronavigation and intraoperative ultrasound were recommended,especially for patients whose lesion was located in the dominant hemisphere.%目的 探讨岛叶海绵状血管畸形(CMs)手术治疗方法与效果.方法 回顾性分析2007年12月至2013年8月手术治疗的4例岛叶CMs患者,采用术中B超(2例联合神经导航)辅助下经侧裂入路切除岛叶CMs,分析手术策略及术后神经功能状态.结果 4例岛叶CMs患者,均以癫痫发作为首发症状,经侧裂-经岛叶入路完整切除CMs.术后随访3~ 72个月(平均36.75个月),1例患者术后神经学恶化,永久神经学缺陷;1例出现语言缺陷,1周后逐渐恢复.Engel疗效分级,4例患者癫痫预后均为Ⅰ级.结论 经侧裂入路可安全可靠的暴露并切除岛叶CMs;神经导航、术中B超可为成功切除岛叶CMs提供指导.

  2. 纯岛叶低级别胶质瘤的显微外科治疗%Microsurgical treatment of purely insular low grade gliomas

    Institute of Scientific and Technical Information of China (English)

    赵建华; 冯继; 裴玉芳; 冯三平; 陈兴河; 江涛

    2011-01-01

    Objective To investigate microsurgical method and outcome for purely insular low grade gliomas. Methods The clinical data of 17 patients with purely insular low grade glioma, which was located at the left insula in 8 and right insula in 9, were analyzed retrospectively. All the tumors were removed via pterional transsylvian approach. Results Complete removal of the tumor was achieved in 12 patients and subtotal removal in 5. The diagnosis was established by postoperative pathological analysis, including 8 astrocytomas, 4 oligodendrogliomas and 5 oligoastrocytomas. There was no operative mortality. Early postoperative complications such as hemiplegia occurred in 2 patients and aphasia in 2. Seventeen patients were followed up for 6 to 12 months, hemiparesis occurred in 1 patient, mild aphasia in 1 and no tumor recurrence was found. Conclusions Microsurgery via pterional transsylvian approach is a safe and effective means for purely insular low grade gliomas. The good understanding of the insular anatomy is helpful for resection of insular low grade gliomas to the full extent and alleviation of neurological disorders of patients after operation.%目的 探讨纯岛叶低级别胶质瘤的显微手术方法及疗效.方法 回顾性分析17例纯岛叶低级别胶质瘤病人的临床资料.其中肿瘤位于左侧岛叶8例,右侧岛叶9例,均采用翼点外侧裂入路手术切除肿瘤.结果 肿瘤全切除12例,近全切除5例.病理结果:星形细胞瘤8例,少枝胶质细胞瘤4例,少枝星形细胞瘤5例.无手术死亡,术后早期发生偏瘫、失语各2例.随访17例,时间6~12个月,均未见肿瘤复发,轻偏瘫1例,轻度失语1例.结论 应用显微外科技术经翼点外侧裂入路治疗纯岛叶低级别胶质瘤安全、有效.了解岛叶解剖有助于最大程度切除岛叶低级别胶质瘤,减少病人术后神经功能障碍.

  3. Insular identity and urban contexts: representations of the local in the construction of an image of Palma (Mallorca, Balearic Islands

    Directory of Open Access Journals (Sweden)

    Mercè Picornell

    2014-11-01

    Full Text Available This article analyses the relationship between island and city in the configuration of an insular identity. The hypothesis addresses the special visibility that, in the case of small islands, results from the confrontation between two relevant singularities – the city and the island – in the symbolic conceptualization of territory. The opposition between island contexts and urban spaces is thus considered in terms of the local/global and rural/urban binaries. These are analysed in contemporary cultural representations of the relationship between the island of Mallorca and its historical and administrative capital, Palma. Since the 1960s, Mallorca has become a mass tourism destination with a considerable demographic impact, especially in the capital, which is the island’s gateway for both tourism and immigration. This paper considers geographical, literary and media discourses along with particular mass-consumption cultural products to argue that Palma is represented as a predatory ‘monster’ devouring the island’s ‘local’ identity. It is argued that different types of neo-ruralism have emerged and reinforced the opposition between the island and the city. This opposition underlies a process of counter-acculturation that delineates and strengthens Mallorcan self-representation in a context defined by an increasingly diverse population as a result of tourism and migratory flows.

  4. Plasticity-Related PKMζ Signaling in the Insular Cortex Is Involved in the Modulation of Neuropathic Pain after Nerve Injury

    Directory of Open Access Journals (Sweden)

    Jeongsoo Han

    2015-01-01

    Full Text Available The insular cortex (IC is associated with important functions linked with pain and emotions. According to recent reports, neural plasticity in the brain including the IC can be induced by nerve injury and may contribute to chronic pain. Continuous active kinase, protein kinase Mζ (PKMζ, has been known to maintain the long-term potentiation. This study was conducted to determine the role of PKMζ in the IC, which may be involved in the modulation of neuropathic pain. Mechanical allodynia test and immunohistochemistry (IHC of zif268, an activity-dependent transcription factor required for neuronal plasticity, were performed after nerve injury. After ζ-pseudosubstrate inhibitory peptide (ZIP, a selective inhibitor of PKMζ injection, mechanical allodynia test and immunoblotting of PKMζ, phospho-PKMζ (p-PKMζ, and GluR1 and GluR2 were observed. IHC demonstrated that zif268 expression significantly increased in the IC after nerve injury. Mechanical allodynia was significantly decreased by ZIP microinjection into the IC. The analgesic effect lasted for 12 hours. Moreover, the levels of GluR1, GluR2, and p-PKMζ were decreased after ZIP microinjection. These results suggest that peripheral nerve injury induces neural plasticity related to PKMζ and that ZIP has potential applications for relieving chronic pain.

  5. Histaminergic modulation of cholinergic release from the nucleus basalis magnocellularis into insular cortex during taste aversive memory formation.

    Directory of Open Access Journals (Sweden)

    Liliana Purón-Sierra

    Full Text Available The ability of acetylcholine (ACh to alter specific functional properties of the cortex endows the cholinergic system with an important modulatory role in memory formation. For example, an increase in ACh release occurs during novel stimulus processing, indicating that ACh activity is critical during early stages of memory processing. During novel taste presentation, there is an increase in ACh release in the insular cortex (IC, a major structure for taste memory recognition. There is extensive evidence implicating the cholinergic efferents of the nucleus basalis magnocellularis (NBM in cortical activity changes during learning processes, and new evidence suggests that the histaminergic system may interact with the cholinergic system in important ways. However, there is little information as to whether changes in cholinergic activity in the IC are modulated during taste memory formation. Therefore, in the present study, we evaluated the influence of two histamine receptor subtypes, H1 in the NBM and H3 in the IC, on ACh release in the IC during conditioned taste aversion (CTA. Injection of the H3 receptor agonist R-α-methylhistamine (RAMH into the IC or of the H1 receptor antagonist pyrilamine into the NBM during CTA training impaired subsequent CTA memory, and simultaneously resulted in a reduction of ACh release in the IC. This study demonstrated that basal and cortical cholinergic pathways are finely tuned by histaminergic activity during CTA, since dual actions of histamine receptor subtypes on ACh modulation release each have a significant impact during taste memory formation.

  6. The language attitude of border peoples Insular Riau, West Kalimantan, East Kalimantan, North Sulawesi, and the Eastern Sunda Islands

    Directory of Open Access Journals (Sweden)

    Dendy Sugono

    2011-04-01

    Full Text Available This research aims at describing (1 the language use of border area societies (Insular Riau, West Kalimantan, East Kalimantan, North Sulawesi, and the Eastern Sunda Islands in terms of local language (BD, Indonesian (BI, and foreign language (BA in the domains of family, society, and occupation, (2 language activity of border area societies relating to news observation, language attention, and language constraints in mass media, (3 language attitude of border area societies towards BD, BI, and BA. The findings are as follows. First, within the family and society at large, BD is more frequently used than BI and BA. This shows that BD functions in non-formal situations. In the professional field, however, BI is more frequently used than BD. Second, people in border provinces widely observe mass media, whether printed or electronic. They also often pay attention to the language the mass media uses. Third, border societies have a positive attitude towards BD as is shown (agree/totally agree by the answers to eight questions relating to BD. The language attitude of border societies towards BI is positive based on the answers (agree/totally agree to seven questions concerning BI. This also means that BI is prestigious for border people, especially in formal communication. The language attitude of border societies towards BA is mixed. In as far as it is negative it implies a positive evaluation of BD and BI because people appreciate them as part of their local and national identities.

  7. Endocannabinoid regulation of nausea is mediated by 2-arachidonoylglycerol (2-AG) in the rat visceral insular cortex.

    Science.gov (United States)

    Sticht, Martin A; Limebeer, Cheryl L; Rafla, Benjamin R; Abdullah, Rehab A; Poklis, Justin L; Ho, Winnie; Niphakis, Micah J; Cravatt, Benjamin F; Sharkey, Keith A; Lichtman, Aron H; Parker, Linda A

    2016-03-01

    Cannabinoid (CB) agonists suppress nausea in humans and animal models; yet, their underlying neural substrates remain largely unknown. Evidence suggests that the visceral insular cortex (VIC) plays a critical role in nausea. Given the expression of CB1 receptors and the presence of endocannabinoids in this brain region, we hypothesized that the VIC endocannabinoid system regulates nausea. In the present study, we assessed whether inhibiting the primary endocannabinoid hydrolytic enzymes in the VIC reduces acute lithium chloride (LiCl)-induced conditioned gaping, a rat model of nausea. We also quantified endocannabinoid levels during an episode of nausea, and assessed VIC neuronal activation using the marker, c-Fos. Local inhibition of monoacylglycerol lipase (MAGL), the main hydrolytic enzyme of 2-arachidonylglycerol (2-AG), reduced acute nausea through a CB1 receptor mechanism, whereas inhibition of fatty acid amide hydrolase (FAAH), the primary catabolic enzyme of anandamide (AEA), was without effect. Levels of 2-AG were also selectively elevated in the VIC during an episode of nausea. Inhibition of MAGL robustly increased 2-AG in the VIC, while FAAH inhibition had no effect on AEA. Finally, we demonstrated that inhibition of MAGL reduced VIC Fos immunoreactivity in response to LiCl treatment. Taken together, these findings provide compelling evidence that acute nausea selectively increases 2-AG in the VIC, and suggests that 2-AG signaling within the VIC regulates nausea by reducing neuronal activity in this forebrain region.

  8. Nocifensive behavior-related laser heat-evoked component in the rostral agranular insular cortex revealed using morphine analgesia.

    Science.gov (United States)

    Wu, Wen-Yi; Liu, Chan-Ying; Tsai, Meng-Li; Yen, Chen-Tung

    2016-02-01

    The rostral agranular insular cortex (RAIC), an opioid-responsive site, is essential for modulating nociception in rats. Our previous studies have shown that morphine suppressed long latency laser heat-evoked nociceptive responses in the primary somatosensory cortex (SmI). By contrast, morphine significantly attenuated both short and long latency responses in the anterior cingulate cortex (ACC). The present study assessed the effect of morphine on laser heat-evoked responses in the RAIC. Laser heat irradiation applied to the rat forepaws at graded levels was used as a specific noxious stimulus. In the RAIC, the first part of the long latency component (140-250ms) of the laser heat-evoked response was enhanced by intraperitoneal morphine (5mg/kg). When the laser heat-evoked cortical responses were examined for trials showing strong nocifensive movement (paw licking), moderate nocifensive movement (paw lifting), and no nocifensive movement, a 140-250ms period enhancement was observed in the RAIC only for the paw lifting movement. This enhancement was absent in the SmI. Thus, our data suggest that the RAIC has a pain-related behavior-dependent neuronal component. Furthermore, the RAIC, ACC, and SmI are differentially modulated by morphine analgesia.

  9. Experience of the Canary Islands in the development of insular 100% RES systems and micro-grids

    Energy Technology Data Exchange (ETDEWEB)

    Piernavieja, Gonzalo; Suarez, Salvador; Henriquez, Daniel [Instituto Tecnologico de Canarias (Canary Islands Institute of Technology - ITC), Las Palmas, Gran Canaria (Spain). RandD Div.

    2010-07-01

    Given the mentioned circumstances, conventional energy planning in the Canary Islands is a very complex task. The Regional Energy Plan PECAN (2007-2015) tries to correct the existing critical situation setting, among others, the ambitious goal of >25% electricity from RES (mostly wind) for 2015. In parallel to this conventional energy planning, outstanding initiatives in the distributed generation field are underway. ITC vision is that the Canarian Archipelago, given its particular characteristics (insular systems of different sizes, abundant RES potential -different sources-, important natural and biodiversity heritage, etc.), are a laboratory for testing and demonstrating new energy technologies in real conditions, as well as their commercial implementation. These new technologies include energy storage (particularly for excess RES that cannot be absorbed by the grids), development of 100% energy self- sufficiency models (with exclusive use of RES) and micro-/minigrids with high RES penetration and RES forecasting, including advanced ICTs and sustainable mobility concepts (e.g. V2G technologies). Given the high conventional generation costs and the relatively low RES costs (wind electricity production cost is less than 0.03 Euro/kWh), the Canary Islands could in the short term achieve grid parity, and in this sense pioneer the change to a RES based energy system. Models tested on the islands could be exported or extrapolated to our islands, regions of developing countries and even other regions in continental Europe. (orig.)

  10. In favor of general probability distributions: lateral prefrontal and insular cortices respond to stimulus inherent, but irrelevant differences.

    Science.gov (United States)

    Mestres-Missé, Anna; Trampel, Robert; Turner, Robert; Kotz, Sonja A

    2016-04-01

    A key aspect of optimal behavior is the ability to predict what will come next. To achieve this, we must have a fairly good idea of the probability of occurrence of possible outcomes. This is based both on prior knowledge about a particular or similar situation and on immediately relevant new information. One question that arises is: when considering converging prior probability and external evidence, is the most probable outcome selected or does the brain represent degrees of uncertainty, even highly improbable ones? Using functional magnetic resonance imaging, the current study explored these possibilities by contrasting words that differ in their probability of occurrence, namely, unbalanced ambiguous words and unambiguous words. Unbalanced ambiguous words have a strong frequency-based bias towards one meaning, while unambiguous words have only one meaning. The current results reveal larger activation in lateral prefrontal and insular cortices in response to dominant ambiguous compared to unambiguous words even when prior and contextual information biases one interpretation only. These results suggest a probability distribution, whereby all outcomes and their associated probabilities of occurrence-even if very low-are represented and maintained. PMID:25523107

  11. Prevalencia de desnutrición en niños tarahumaras menores de cinco años en el municipio de Guachochi, Chihuahua

    OpenAIRE

    Monárrez Joel; Martínez Homero

    2000-01-01

    OBJETIVO: Determinar la prevalencia de desnutrición en niños tarahumaras menores de cinco años en el municipio de Guachochi, Chihuahua, México. MATERIAL Y MÉTODOS: Durante el verano de 1996, fueron muestreados 450 niños, representativos de 62 comunidades, estratificadas por el tamaño de su población. La muestra representa 12.2% del total de tarahumaras del municipio. Para cada uno de los índices antropométricos peso/edad, peso/talla y talla/edad se calculó la desviación en puntaje Z de cada o...

  12. Efectos de espacio sobre costos de provisión local. Un modelo de ecualización por bloques para los municipios bolivianos

    Directory of Open Access Journals (Sweden)

    Barrios Suvelza, Franz Xavier

    2005-12-01

    Full Text Available Bolivia experimentó una importante transformación territorial después de que se aprobó la Ley de Participación Popular en 1994. Los efectos benéficos de tal reforma estuvieron acompañados de una serie de efectos contraproducentes, entre ellos los que se derivan del modelo de transferencias centrales hacia los municipios. Este artículo propone un nuevo modelo de transferencias que complementa el actual ¿sistema de dotación fiscal a municipios según el principio per cápita¿ con uno de ¿ecualización fiscal intermunicipal por bloques¿.

  13. Zonificación del Municipio Gibara, útil de trabajo para el comienzo de las actividades extensión agrícola.

    OpenAIRE

    Raciel Ojeda Fernández; Severo Aranda Aranda; Daimarelis Rodríguez Leyva

    2003-01-01

    Se expone la zonificación del municipio Gibara fundamentado en un análisis sistémico del medio donde se desarrolla la producción agropecuaria. Para conseguir este resultado se comenzó con la búsqueda de informaciones del medio físico, socioeconómico y agrícola del municipio. Posteriormente se confeccionaron mapas de hidrología, suelos, temperatura, vías de comunicación terrestres, pluviometría y prácticas agrícolas; a continuación se analizó la información contenida en cada mapa superponiéndo...

  14. Los conocimientos tradicionales de la palma datilera y sus deri-vados como atractivo turístico-cultural del municipio Díaz, Estado Nueva Esparta

    Directory of Open Access Journals (Sweden)

    Bracho Toro, Cecilia

    2007-01-01

    Full Text Available The actual state of the traditional knowledge about the date palm, its products and use as a cultural touristic attraction in Municipio Díaz, Nueva Esparta state, is diagnosticated. A descriptive and field study of the community of Fuentidueño, using the semi-structured interviews was made. The com-munity has an amount of traditional knowledge due to its wisdom (learning. The new generation is hardly incorporated to learn this traditional knowledge about the date palm and its products, are the main conclusions. Legal, educational and community recommendations are given to incorporate the traditional knowledge about the date palm and its products as a cultural touristic attraction of the Municipio

  15. Caracterización de germoplasma de cebollín (Allium cepa var. Aggregatum, en el municipio de Gibara, provincia de Holguín

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    Hubert Rodríguez García

    2010-01-01

    Full Text Available Se colectaron y estudiaron 18 accesiones de cebollín (Allium cepa var Aggregatum entre los productores del municipio Gibara se plantaron en las fincas de los productores de la CCS Mario Muñoz Gibara. El estudio se realizo en el período comprendido de enero del 2005 a diciembre del 2006, con el objetivo de realizar una caracterización del germoplasma para determinar las variedades existentes en del municipio. Entre los principales resultados obtenidos se identificaron dos variedades en el agroecosistema: Bola Roja de bulbos de color rojo violáceo, redondos globoso y pungencia fuerte y la variedad Amarillo Largo de bulbos amarillo naranja, fusiformes-oblongos y de pungencia media.

  16. El Procede y el Piso en la incorporación del suelo de propiedad social a usos urbanos en los municipios conurbados de la ZMCM

    Directory of Open Access Journals (Sweden)

    Lucy Nelly Maya González

    2004-01-01

    Full Text Available En este artículo se revisan los mecanismos de incorporación regulada del suelo de origen social1 al desarrollo urbano en el ámbito de los municipios conurbados de la Zona Metropolitana de la Ciudad de México (ZMCM. A diez años de las modificaciones al artículo 27 constitucional se explora la forma en que los programas Procede y Piso han participado en la regulación del cambio de uso de suelo de rural a urbano, los factores que han influido en que los ejidatarios hayan decidido utilizar los nuevos mecanismos de desincorporación del régimen de propiedad social y la posición de los distintos actores involucrados (ejidatarios, Sector Agrario, Corett, desarrolladores privados y municipios ante estos mecanismos.

  17. População, grupos étnico-raciais e economia cafeeira: São Carlos, 1907 Población, grupos étnico-raciales y economía cafetera: São Carlos, 1907 Population, ethnic groups and the coffee industry: São Carlos, Brazil, 1907

    Directory of Open Access Journals (Sweden)

    Oswaldo Mário Serra Truzzi

    2009-12-01

    Full Text Available Em São Carlos, a formação de uma população estabelecida iniciou-se ainda na primeira metade do século XIX, com as primeiras fazendas mantidas a braço escravo. Em 1884, com a chegada da ferrovia, o município inseriu-se definitivamente na vigorosa economia cafeeira paulista. São Carlos acompanhou assim a transição de uma economia tocada por trabalho escravo para outra em que predominavam colonos livres, de origem europeia, sobretudo italiana. Menos de duas décadas após a abolição do cativeiro, a composição racial da população alterou-se significativamente, graças ao grande afluxo de imigrantes e, provavelmente também, ainda que em menor grau, à saída de ex-escravos do município. Esse aporte diversificado traduziu-se no levantamento censitário realizado no município em 1907, que abrangeu a compilação de informações variadas referentes a 38.642 indivíduos que então o habitavam. Este trabalho busca analisar e discutir as características demográficas e a inserção social de diferentes grupos étnico-raciais presentes na população de São Carlos nessa época. Sua relevância deriva também da ausência de levantamentos populacionais no período em questão, dadas as conhecidas deficiências do censo de 1890 e 1900 e o longo período de 34 anos de intermitência entre o levantamento populacional da província de São Paulo de 1886 e o censo nacional de 1920, este mais confiável, porém omisso quanto à cor dos indivíduos.En São Carlos, la formación de una población establecida se inició aún en la primera mitad del siglo XIX, con las primeras haciendas mantenidas por el trabajo esclavo. En 1884, con la llegada de la ferrovía, el municipio se insertó definitivamente en la vigorosa economía cafetera paulista. São Carlos acompañó así la transición de una economía tocada por el trabajo esclavo a otra en la que predominaban los colonos libres de origen europeo, sobre todo italiano. Menos de dos d

  18. Valoración económica de los servicios ambientales del bosque del municipio de Ixtapaluca, Estado de México, México

    OpenAIRE

    Bertha Sofía Larqué-Saavedra; Ramón Valdivia Alcalá; Fabián Islas Gutiérrez; José Luis Romo Lozano

    2004-01-01

    La zona metropolitana del valle de México está enfrentando problemas ambientales derivados del deterioro de sus recursos naturales. Al oriente de esta zona, el municipio de Ixtapaluca, Estado de México, cobra importancia por poseer la superficie forestal más grande. Desafortunadamente esta superficie ha venido disminuyendo a causa de incendios, plagas, prácticas de cambios de uso de suelo, pastoreo intensivo y tala clandestina e indiscriminada. Esta tendencia significa un grave problema para ...

  19. Formulación participativa del presupuesto en el municipio Caroní: comparación con la experiencia de Porto Alegre

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    María Pilar GARCÍA-GUADILLA

    2009-11-01

    Full Text Available RESUMEN: El presente artículo evalúa la experiencia de descentralización local que se lleva a cabo desde 1990 hasta la fecha en el Municipio Caroní de Ciudad Guayana, Venezuela. Focalizándose en la elaboración del presupuesto participativo, se identifican los alcances y limitaciones de algunas prácticas de democracia participativa tales como la participación ciudadana en la gestión local. Finalmente, se hace una comparación con la experiencia de elaboración del presupuesto en forma participativa del municipio de Porto Alegre (Brasil estableciéndose las semejanzas y diferencias entre ambos procesos en lo que se refiere a los siguientes aspectos: la apertura de nuevos espacios de participación, el acceso a la información, la satisfacción de las demandas sociales en consonancia con los criterios de equidad y eficiencia, la existencia y utilización de mecanismos de control de la gestión y la posibilidad de trascender desde la participación local hacia la cultura política de ciudadanos o ciudadanía activa.ABSTRACT: This article evaluates the experience with local decentralization of the Municipio Caroní, in Venezuela since 1990 from the point of view of participatory democracy. It analyzes the decision making process around the elaboration of the socalled "Participatory Budgeting" and compares it with the case of the Municipio Porto Alegre in Brazil in order to draw some conclussión about: the opening of new spaces for participation, access to vital information, residente" satisfacction of their demands according to the criteria of efficiency and equity, mechanisms of control over the representatives and the possibility to trascend from a culture of local participatión to a citizens and active culture.

  20. Gastronomía típica Margariteña como atractivo turístico del Municipio Mariño Estado Nueva Esparta

    OpenAIRE

    Medina, María; Ontón, Silvia; Lunar Leandro, Rafael Antonio

    2008-01-01

    The typical margariteñan gastronomy, its elements: restaurants, authors, dishes and promotion as a tourism attraction at the Municipio Mariño is characterized. Recommendations for its improvement are presented. Tourism and gastronomy are the theoretical grounds and its importance for the tourism industry. A descriptive and field methodology was used. Today, there is a lack of information, promo-tion and improvement of the typical margariteñan gastronomy as a tourism attraction at the Munici...

  1. La educación ambiental: la escasa percepción social del problema de los residuos urbanos en el municipio de Alicante

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    Rocío Díez Ros

    2002-01-01

    Full Text Available En el trabajo se exponen los resultados de una encuesta de opinión realizada a los vecinos del municipio de Alicante acerca de sus Residuos Urbanos. De las respuestas obtenidas es posible inferir una escasa percepción social de los problemas medioambientales generados por una gestión inadecuada de estos residuos. En este sentido, se proponen acciones de Educación Ambiental para mejorar esta situación.

  2. Caracterización psicosocial de un grupo de adolescentes embarazadas del municipio Campechuela. Psychological characterization of pregnant adolescents in the municipality of Campechuela

    OpenAIRE

    Elsa Pérez Rosabal; Yudmila Soler Sánchez; Rebeca Pérez Rosabal; Laidys Marlenes Fonseca Méndez

    2015-01-01

    Se realizó un estudio observacional descriptivo de enfoque cuantitativo y corte transversal, en el periodo comprendido entre enero y marzo de 2012, con adolescentes embarazadas de los Consejos Populares 1 y 2 del municipio Campechuela, con el objetivo de caracterizar desde el punto de vista psicosocial a estas adolescentes. El universo quedó constituido por las 50 adolescentes embarazadas de dichos consejos populares, la muestra quedó conformada por 25 adolescentes, seleccionadas de for...

  3. Monte carlo simulation for soot dynamics

    KAUST Repository

    Zhou, Kun

    2012-01-01

    A new Monte Carlo method termed Comb-like frame Monte Carlo is developed to simulate the soot dynamics. Detailed stochastic error analysis is provided. Comb-like frame Monte Carlo is coupled with the gas phase solver Chemkin II to simulate soot formation in a 1-D premixed burner stabilized flame. The simulated soot number density, volume fraction, and particle size distribution all agree well with the measurement available in literature. The origin of the bimodal distribution of particle size distribution is revealed with quantitative proof.

  4. Fast quantum Monte Carlo on a GPU

    CERN Document Server

    Lutsyshyn, Y

    2013-01-01

    We present a scheme for the parallelization of quantum Monte Carlo on graphical processing units, focusing on bosonic systems and variational Monte Carlo. We use asynchronous execution schemes with shared memory persistence, and obtain an excellent acceleration. Comparing with single core execution, GPU-accelerated code runs over x100 faster. The CUDA code is provided along with the package that is necessary to execute variational Monte Carlo for a system representing liquid helium-4. The program was benchmarked on several models of Nvidia GPU, including Fermi GTX560 and M2090, and the latest Kepler architecture K20 GPU. Kepler-specific optimization is discussed.

  5. Advanced computers and Monte Carlo

    International Nuclear Information System (INIS)

    High-performance parallelism that is currently available is synchronous in nature. It is manifested in such architectures as Burroughs ILLIAC-IV, CDC STAR-100, TI ASC, CRI CRAY-1, ICL DAP, and many special-purpose array processors designed for signal processing. This form of parallelism has apparently not been of significant value to many important Monte Carlo calculations. Nevertheless, there is much asynchronous parallelism in many of these calculations. A model of a production code that requires up to 20 hours per problem on a CDC 7600 is studied for suitability on some asynchronous architectures that are on the drawing board. The code is described and some of its properties and resource requirements ae identified to compare with corresponding properties and resource requirements are identified to compare with corresponding properties and resource requirements are identified to compare with corresponding properties and resources of some asynchronous multiprocessor architectures. Arguments are made for programer aids and special syntax to identify and support important asynchronous parallelism. 2 figures, 5 tables

  6. Propuesta y aplicación de una metodología para estimar la e-preparación de municipios colombianos

    Directory of Open Access Journals (Sweden)

    Diego Chavarro

    2008-05-01

    Full Text Available La conformación y consolidación de municipios digitales requiere de construcciones metodológicas que respondan a las diferentes particularidades de los territorios y sus habitantes. La mayoría de municipios colombianos pequeños desconoce la capacidad de apropiación que tienen sus habitantes de las tecnologías de la información y la comunicación - TIC. Nuestro trabajo consiste en construir una metodología para estimar la preparación electrónica (e-preparación, e-readiness de estos municipios, tanto en cuestiones técnicas como sociales. Presentamos la metodología y su aplicación en dos realidades socioculturales distintas: Castilla la Nueva (Meta y Guaduas (Cundinamarca./ The shaping and consolidation of digital municipalities require methodological constructs able to take into account the singularities of territories and their inhabitants. Many Colombian municipalities don't have an understanding of their capability to assimilate Information and telecommunication Technologies - ICT. Our work consists in constructing a methodology to estimate the e-readiness of Colombian municipalities concerning both technical and social issues. We present the methodology and its application in two different socio-cultural realities: Castilla la Nueva (Meta and Guaduas (Cundinamarca.

  7. La problemática del manejo de los residuos sólidos en seis municipios del sur de Zacatecas

    Directory of Open Access Journals (Sweden)

    Germaín A. Castañeda Delgado

    2015-01-01

    Full Text Available los objetivos de la presente investigación son determinar la cantidad de residuos sólidos generados en seis municipios del estado de Zacatecas, México, y comparar su composición porcentual en peso y volumen. Los resultados muestran la complejidad para el tratamiento y la disposición final de residuos sólidos en los municipios rurales y urbanos, debido a los grandes volúmenes generados y a los cambios en los patrones de consumo, que revelan la necesidad de emprender proyectos enfocados a su reducción, reciclaje, reutilización y valorización energética en los municipios analizados, además pueden servir para evaluar el inicio de acciones conjuntas entre ciudadanos y autoridades municipales para su tratamiento y disposición final. Esta investigación pretende contribuir al entendimiento de los problemas asociados a la disposición final de residuos en el estado de Zacatecas.

  8. DISEÑO DE UNA PROPUESTA DE MARKETING ECOTURÍSTICO PARA EL MUNICIPIO DE LA PLAYA DE BELÉN COMO DESTINO TURÍSTICO

    Directory of Open Access Journals (Sweden)

    Luis Alfonso Sánchez Borja

    2014-06-01

    Full Text Available El proyecto tiene como objetivo diseñar una propuesta de Marketing Ecoturístico para el Municipio de la Playa de Belén en el departamento de Norte de Santander, Colombia; se presentan los aspectos generales del Municipio, tales como; ubicación geográfica, topografía, aspectos étnicos y culturales. Seguidamente describe el análisis DOFA, la metodología y conceptos utilizados de mayor interés que aportan al desarrollo de la investigación con el fin de realizar un diagnóstico turístico sobre los componentes de intangibilidad turística, superestructura, infraestructura, planta turística, atractivos y descripción cultural de la comunidad de la Playa de Belén. Los resultados obtenidos se reflejan a través del análisis de mercado mediante encuesta aplicada a la comunidad, operadores y turistas, se analiza la situación actual, se diseña el plan de marketing creando unos objetivos, estrategias y recomendaciones de proyección para el municipio.

  9. Zonificación del Municipio Gibara, útil de trabajo para el comienzo de las actividades extensión agrícola.

    Directory of Open Access Journals (Sweden)

    Raciel Ojeda Fernández

    2003-01-01

    Full Text Available Se expone la zonificación del municipio Gibara fundamentado en un análisis sistémico del medio donde se desarrolla la producción agropecuaria. Para conseguir este resultado se comenzó con la búsqueda de informaciones del medio físico, socioeconómico y agrícola del municipio. Posteriormente se confeccionaron mapas de hidrología, suelos, temperatura, vías de comunicación terrestres, pluviometría y prácticas agrícolas; a continuación se analizó la información contenida en cada mapa superponiéndolos a igual escala. Este proceso concluyo con la división del municipio en tres zonas, caracterizadas y con valoraciones iniciales de sus principales problemáticas que apoyarán el objetivo de facilitar la toma de decisiones del personal de Investigación, extensión agraria, técnicos, directivos y productores vinculados con la actividad agropecuaria.

  10. Experiencia sobre educación rural en el municipio de Samacá, Boyacá. Colombia

    Directory of Open Access Journals (Sweden)

    María Cecilia Rodríguez Rueda

    2007-12-01

    Full Text Available Recibido 3 de noviembre de 2006 • Aprobado 30 de noviembre de 2006      Resumen. La experiencia, que a continuación se describe, es el resultado del trabajo con comunidades e instituciones educativas rurales que viene desarrollando el Grupo de Investigación Educación Rural de la Universidad Pedagógica y Tecnológica de Colombia desde 1999, en el municipio de Samacá, Boyacá. Esta se realiza en dos fases: la primera, recoge una visión holística de carácter socio-cultural y pedagógico de las familias que habitan en las veredas de Guantoque, Páramo Centro y Gacal y sus respectivas instituciones educativas. La segunda fase, coherente con los resultados obtenidos, busca diseñar y ejecutar, a través de la investigación-proyección social, una propuesta alternativa pedagógica y de atención primaria en salud, que contribuya a mejorar las condiciones de los menores y sus familias en el sector. La metodología utilizada en este proceso es la investigación-acción participativa, donde se han involucrado, los maestros de las escuelas, los padres y las madres de familia, las instituciones y organizaciones del municipio, la administración municipal y la Secretaria de Educación Departamental. Los resultados obtenidos se relacionan con los compromisos adquiridos por los diferentes sujetos participantes, pero además, con el conocimiento de la realidad cultural, pedagógica y física de los menores.  Abstract. The author describes the experience of working with rural communities and its educational institutions developed by the Rural Education Investigative. Group of Universidad Pedagógica y Tecnologica de Colombia, since 1999 at the municipality of Samaca, Boyacá. This experience had two stages; the first one gathered the socio cultural and pedagogical characteristics, in a holistic vision, of the families living in Guantoque, Páramo Central y Gacal areas. The second stage of the experience is based on the results obtained and

  11. Factores de éxito emprendedor en dos municipios de la montaña de Guerrero, México

    Directory of Open Access Journals (Sweden)

    Juan Morales-Jiménez

    2015-01-01

    Full Text Available El Objetivo del trabajo fue identificar la motivación para el emprendimiento y los factores del éxito competitivo de los emprendedores de pequeños negocios que se ubican en la Montaña de Guerrero, México. Se aplicó un cuestionario con preguntas cerradas, con una escala de tipo Likert, con variables de los factores económicos, psicológicos, sociales y culturales para identificar diferencias de emprendimiento y del éxito competitivo. Estas diferencias fueron medidas con base en la importancia que el dueño le asignó a las acciones de desarrollo del negocio. Con la prueba de U de Mann-Whitney se evaluó estadísticamente si había diferencias en el éxito competitivo entre los municipios de Huamuxtitlán y Metlatónoc. Los resultados indicaron que la mayoría de los emprendedores son jóvenes y en su mayoría son mujeres, quienes inician la microempresa con ahorros propios y predomina en su operación la informalidad. El factor económico de motivación para emprender una microempresa o negocio fue la mejora en el ingreso. El principal factor psicológico fue la confianza en el éxito del negocio, siendo importante la motivación del o la conyugue. El factor social fue el desempleo y el factor espacial fue la buena ubicación del negocio. Al comparar entre municipios, se encontró diferencia estadística significativa entre ellos (p ≤ 0.001 para todos los factores evaluados. El análisis de regresión logística binaria indicó que las variables de mayor peso para la consolidación o éxito de las empresas de los emprendedores de la Montaña de Guerrero son la edad, la escolaridad y el lugar donde estén ubicados.

  12. 11th International Conference on Monte Carlo and Quasi-Monte Carlo Methods in Scientific Computing

    CERN Document Server

    Nuyens, Dirk

    2016-01-01

    This book presents the refereed proceedings of the Eleventh International Conference on Monte Carlo and Quasi-Monte Carlo Methods in Scientific Computing that was held at the University of Leuven (Belgium) in April 2014. These biennial conferences are major events for Monte Carlo and quasi-Monte Carlo researchers. The proceedings include articles based on invited lectures as well as carefully selected contributed papers on all theoretical aspects and applications of Monte Carlo and quasi-Monte Carlo methods. Offering information on the latest developments in these very active areas, this book is an excellent reference resource for theoreticians and practitioners interested in solving high-dimensional computational problems, arising, in particular, in finance, statistics and computer graphics.

  13. Monte Carlo methods for particle transport

    CERN Document Server

    Haghighat, Alireza

    2015-01-01

    The Monte Carlo method has become the de facto standard in radiation transport. Although powerful, if not understood and used appropriately, the method can give misleading results. Monte Carlo Methods for Particle Transport teaches appropriate use of the Monte Carlo method, explaining the method's fundamental concepts as well as its limitations. Concise yet comprehensive, this well-organized text: * Introduces the particle importance equation and its use for variance reduction * Describes general and particle-transport-specific variance reduction techniques * Presents particle transport eigenvalue issues and methodologies to address these issues * Explores advanced formulations based on the author's research activities * Discusses parallel processing concepts and factors affecting parallel performance Featuring illustrative examples, mathematical derivations, computer algorithms, and homework problems, Monte Carlo Methods for Particle Transport provides nuclear engineers and scientists with a practical guide ...

  14. Frontiers of quantum Monte Carlo workshop: preface

    International Nuclear Information System (INIS)

    The introductory remarks, table of contents, and list of attendees are presented from the proceedings of the conference, Frontiers of Quantum Monte Carlo, which appeared in the Journal of Statistical Physics

  15. "Shaakal" Carlos kaebas arreteerija kohtusse / Margo Pajuste

    Index Scriptorium Estoniae

    Pajuste, Margo

    2006-01-01

    Ilmunud ka: Postimees : na russkom jazõke 3. juuli lk. 11. Vangistatud kurikuulus terrorist "Shaakal" Carlos alustas kohtuasja oma kunagise vahistaja vastu. Ta süüdistab Prantsusmaa luureteenistuse endist juhti inimröövis

  16. Simulation and the Monte Carlo method

    CERN Document Server

    Rubinstein, Reuven Y

    2016-01-01

    Simulation and the Monte Carlo Method, Third Edition reflects the latest developments in the field and presents a fully updated and comprehensive account of the major topics that have emerged in Monte Carlo simulation since the publication of the classic First Edition over more than a quarter of a century ago. While maintaining its accessible and intuitive approach, this revised edition features a wealth of up-to-date information that facilitates a deeper understanding of problem solving across a wide array of subject areas, such as engineering, statistics, computer science, mathematics, and the physical and life sciences. The book begins with a modernized introduction that addresses the basic concepts of probability, Markov processes, and convex optimization. Subsequent chapters discuss the dramatic changes that have occurred in the field of the Monte Carlo method, with coverage of many modern topics including: Markov Chain Monte Carlo, variance reduction techniques such as the transform likelihood ratio...

  17. Smart detectors for Monte Carlo radiative transfer

    CERN Document Server

    Baes, Maarten

    2008-01-01

    Many optimization techniques have been invented to reduce the noise that is inherent in Monte Carlo radiative transfer simulations. As the typical detectors used in Monte Carlo simulations do not take into account all the information contained in the impacting photon packages, there is still room to optimize this detection process and the corresponding estimate of the surface brightness distributions. We want to investigate how all the information contained in the distribution of impacting photon packages can be optimally used to decrease the noise in the surface brightness distributions and hence to increase the efficiency of Monte Carlo radiative transfer simulations. We demonstrate that the estimate of the surface brightness distribution in a Monte Carlo radiative transfer simulation is similar to the estimate of the density distribution in an SPH simulation. Based on this similarity, a recipe is constructed for smart detectors that take full advantage of the exact location of the impact of the photon pack...

  18. Monte Carlo simulation of granular fluids

    OpenAIRE

    Montanero, J. M.

    2003-01-01

    An overview of recent work on Monte Carlo simulations of a granular binary mixture is presented. The results are obtained numerically solving the Enskog equation for inelastic hard-spheres by means of an extension of the well-known direct Monte Carlo simulation (DSMC) method. The homogeneous cooling state and the stationary state reached using the Gaussian thermostat are considered. The temperature ratio, the fourth velocity moments and the velocity distribution functions are obtained for bot...

  19. Carlos II: el centenario olvidado

    Directory of Open Access Journals (Sweden)

    Luis Antonio RIBOT GARCÍA

    2009-12-01

    Full Text Available RESUMEN: A partir de una reflexión inicial sobre el fenómeno de las conmemoraciones, el autor se plantea las causas por las que el tercer centenario de la muerte de Carlos II no dará lugar a ninguna conmemoración. Con independencia de las valoraciones de todo tipo que puedan hacerse de dichas celebraciones, lo cierto es que, en este caso, tal vez hubieran permitido acercar al gran público a uno de los monarcas peor conocidos y menos valorados de la historia de España. Lo más grave, sin embargo, es que la sombra del desconocimiento y el juicio peyorativo se extienden también sobre todo su reinado. Las investigaciones sobre aquel periodo, sin embargo, a pesar de que no abundan, muestran una realidad bastante distinta, en la que la decadencia y la pérdida de la hegemonía internacional convivieron con importantes iniciativas y realizaciones políticas, tanto en el ámbito interno de la Monarquía, como en las relaciones internacionales.ABSTRACT: Parting from an initial reflection about the phenomenon of commemorations, the author ponders the causes for which the third centenary of Charles IFs death will not be the subjet of any celebrations. Besides any evaluations which might be made of these events, the truth is that, perhaps, in this case, a commemoration would have brought the general public closer to one of the least known and worst valued monarchs in the history of Spain. What is more serious, however, is the fact that the shadow of ignorance and pejorative judgement extend also over the entirety of his reign. Though scarce, research about this period shows a very different reality, in wich decadence and the loss of international hegemony cohabitated with important political initiatives and achievements, both in the monarchy's internal domain and in the international arena.

  20. Currículo comprehensivo y extensión universitaria. Experiencia de municipio de San Bernardo, Cundinamarca.

    Directory of Open Access Journals (Sweden)

    Winston Licona Calpe

    2010-05-01

    Full Text Available La vieja y nueva pregunta por el sentido de la práctica educativa universitaria ha propiciado, en la historia reciente de este sector, la revisión de las didácticas propias del currículo tradicional, que se caracteriza por su sentido endógeno, autista y autonomista, cognitivista y reproductivista. Así, ha permitido el desarrollo de didácticas del currículo comprensivo que, por su parte, se distingue por su sentido dialógico, comunicativo y de competencias lingüísticas y conversacionales. Hoy, este dinamismo de la refl exión educativa, presionado por las condiciones socioeconómicas, políticas y culturales, permite asumir la tarea de construir un currículo comprehensivo que tiene como razón de ser la integración de la investigación y la docencia a través de la extensión local, comunitaria, pública y privada como medio para construir compromiso y corresponsabilidad social universitaria. Para ello se presenta la experiencia con el Municipio de San Bernardo, Cundinamarca.

  1. Análisis de la seguridad alimentaria en los hogares el municipio de Xochiapulco Puebla, México

    Directory of Open Access Journals (Sweden)

    Guadalupe Selene Zárate Guevara

    2016-01-01

    Full Text Available El objetivo de este estudio es conocer el grado de seguridad alimentaria que presentan los hogares del municipio de Xochiapulco, Puebla, teniendo como variables de estudio la disponibilidad y suficiencia alimentaria, el acceso físico y económico a los alimentos y la equidad y carencia por acceso a los alimen- tos. El estudio se desarrolló con un muestreo aleatorio simple con unidad de análisis el hogar rural. Los resultados muestran que el 54% de las familias no tiene acceso económi- co a los alimentos y el 64% sí accede mediante la agricultura familiar, con la producción de maíz, frijol y hortalizas; con un déficit de cuatro meses al año, no obstante cubren una suficiencia alimentaria de 1,979 kcal, lo cual es insuficiente en comparación al consumo óptimo de 2,415 kcal.

  2. La discapacidad en niños hasta los seis años de edad del municipio Majibacoa

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    Nadia Rosa Hechavarría Almaguer

    2014-10-01

    Full Text Available La discapacidad infantil constituye un gran problema de salud a nivel mundial; conocer sus características permite mejorar su asistencia. Se realizó un estudio descriptivo de corte transversal, en una muestra de 84 niños diagnosticados con discapacidad transitoria y/o permanente, con el objetivo de caracterizar la discapacidad en niños hasta seis años de edad en el municipio de Majibacoa. Se aplicó un cuestionario a los padres y se realizó un examen físico detallado a los niños, la discapacidad fue definida mediante la clasificación internacional de las funciones, tomando para el estudio las funciones corporales. El mayor porciento ocurrió en el momento del nacimiento, encontrándose una superior incidencia en el grupo de los menores de un año, la diferencia de sexo no fue significativa. Los factores de riesgo en la etapa perinatal se encontraron como los de mayor repercusión. Las discapacidades físico-motoras fueron las más frecuentes, presentándose el retardo en el desarrollo psicomotor como la mayor limitación. Gran parte de la muestra procedió de la zona rural, de la cual un número considerable no asistió a los servicios de rehabilitación

  3. Registro de algunas plantas medicinales cultivadas en San Cristóbal, municipio de Medellín (Antioquia - Colombia

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    Bladimir Vera Marín

    2015-06-01

    Full Text Available Las plantas medicinales cumplen un papel importanteen el cuidado de la salud de los habitantes de zonas rurales, ya quepor medio de estas se atienden necesidades primarias en salud.De igual forma, la investigación etnobotánica orientada hacia laidentificación de este tipo de plantas es una fuente importantede información para el desarrollo futuro de alternativas encomunidades donde este conocimiento se está perdiendo oya no existe. Durante un periodo de siete meses se adelantó elinventario de las plantas medicinales cultivadas por campesinosen 3 veredas del corregimiento de San Cristóbal (Medellín-Antioquia, colectándose un total de 105 especies en ochohuertos, y de las cuales se reportan detalladamente las 41 másfrecuentemente encontradas en los huertos visitados. Estas últimasse distribuyeron en 17 familias y 31 géneros, siendo Asteraceaela más representativa con 7 especies, seguida por Apiaceae yLamiaceae con 6 y Verbenaceae y Amaranthaceae con 4 cadauna. Se resalta el alto número de especies registradas en estapequeña área y la gran cantidad de usos medicinales indicados.Se espera que la información aquí consignada sea un buen aporteal conocimiento y divulgación de las especies medicinales del árearural del municipio de Medellín.

  4. Comportamiento agroproductivo de 10 variedades de frijol común (Phaseolus vulgaris L. en el agroecosistema del municipio de Yaguajay.

    Directory of Open Access Journals (Sweden)

    Wilfredo Valdivia Pérez

    2015-09-01

    Full Text Available Se presentan los resultados del comportamiento agroproductivo de 10 variedades de frijol común (Phaseolus vulgaris L., en las condiciones edafoclimáticas de la CCS “Luis La O” del municipio Yaguajay, provincia de Sancti Spíritus. El estudio se llevó a cabo en el período diciembre 2013- marzo 2014.Con un marco de siembra de 0,50 m x 0,10 m, para 200 000 - 250 000 plantas por hectárea. Utilizamos un diseño Latinizado con tres bloques de 10 parcelas distribuidas al azar y de 5 m2 cada una. El estudio fenológico manifestó que las variedades más precoces resultaron: Velazco Largo y Cul-156. Las de ciclo más largo: CC-25-9 (n y Tomeguín 93. La información reveló diferencias en el comportamiento fenológico de las variedades, al comparar los parámetros del experimento, con los que publica el Instituto de Investigaciones de Granos (IIG. Se apreció que las variedades: Buena Ventura (r y CC-25-9 (r como las de mejor comportamiento en cuanto al rendimiento, con diferencias significativas respecto a las demás variedades. Estas variedades no lograron sus rendimientos potenciales, pero superaron los rendimientos del territorio.

  5. El capital social en los resguardos indígenas wayuu del municipio de Riohacha (La Guajira - Colombia

    Directory of Open Access Journals (Sweden)

    Erótida Beatríz Mejía Curiel

    2014-01-01

    Full Text Available El artículo está basado en la investigación sobre capital social en los resguardos indígenas wayuu del municipio de Riohacha (La Guajira –Colombia. Su objetivo fue analizar los elementos que caracterizan el capital social en la población objeto de estudio. Para la obtención de la información se utilizaron los enfoques cuantitativo y cualitativo. El tipo de investigación fue descriptiva-explicativa y las técnicas primarias aplicadas fueron la encuesta, el grupo focal y la entrevista. Los resultados evidencian que la población de los resguardos tiene sus necesidades básicas insatisfechas. En la cohesión social, se observa que los lazos de consanguinidad son los de mayor relevancia. En cuanto a la participación cívica y política, esta tiende a ser más evidente en dinamismos políticos que en otro tipo de actividades. Confían tanto en sí mismos como en sus familiares y la solidaridad que se practica es alta. Se concluyó que la comunidad wayuu posee un gran potencial de capital social acumulado, demostrado en su diario accionar.

  6. Alteraciones espirométricas en pacientes asmáticos del municipio Majibacoa, 2009-2013

    Directory of Open Access Journals (Sweden)

    Mailin Molina Leyva

    2014-08-01

    Full Text Available Se realizó un estudio descriptivo, con el objetivo de identificar alteraciones espirométricas en pacientes asmáticos del municipio Majibacoa, en el período comprendido desde enero del 2009 a enero del 2013. La muestra se integró por cincuenta pacientes asmáticos con más de 20 años de evolución de la enfermedad. Se les realizó previo consentimiento informado y una prueba espirométrica. Predominó el sexo femenino y las edades comprendidas entre 35 y 54 años. Prevalecieron los pacientes en la categoría de asma persistente severa. El volumen espiratorio forzado del primer segundo se comportó patológico en el mayor por ciento de los pacientes y la capacidad vital forzada mostró alteración en un menor número de pacientes. El patrón espirométrico obstructivo fue el más frecuente en los pacientes estudiados

  7. Necessary, yet dissociable contributions of the insular and ventromedial prefrontal cortices to norm adaptation: computational and lesion evidence in humans.

    Science.gov (United States)

    Gu, Xiaosi; Wang, Xingchao; Hula, Andreas; Wang, Shiwei; Xu, Shuai; Lohrenz, Terry M; Knight, Robert T; Gao, Zhixian; Dayan, Peter; Montague, P Read

    2015-01-14

    Social norms and their enforcement are fundamental to human societies. The ability to detect deviations from norms and to adapt to norms in a changing environment is therefore important to individuals' normal social functioning. Previous neuroimaging studies have highlighted the involvement of the insular and ventromedial prefrontal (vmPFC) cortices in representing norms. However, the necessity and dissociability of their involvement remain unclear. Using model-based computational modeling and neuropsychological lesion approaches, we examined the contributions of the insula and vmPFC to norm adaptation in seven human patients with focal insula lesions and six patients with focal vmPFC lesions, in comparison with forty neurologically intact controls and six brain-damaged controls. There were three computational signals of interest as participants played a fairness game (ultimatum game): sensitivity to the fairness of offers, sensitivity to deviations from expected norms, and the speed at which people adapt to norms. Significant group differences were assessed using bootstrapping methods. Patients with insula lesions displayed abnormally low adaptation speed to norms, yet detected norm violations with greater sensitivity than controls. Patients with vmPFC lesions did not have such abnormalities, but displayed reduced sensitivity to fairness and were more likely to accept the most unfair offers. These findings provide compelling computational and lesion evidence supporting the necessary, yet dissociable roles of the insula and vmPFC in norm adaptation in humans: the insula is critical for learning to adapt when reality deviates from norm expectations, and that the vmPFC is important for valuation of fairness during social exchange. PMID:25589742

  8. Noradrenergic Activation of the Basolateral Amygdala Enhances Object Recognition Memory and Induces Chromatin Remodeling in the Insular Cortex

    Directory of Open Access Journals (Sweden)

    Hassiba eBeldjoud

    2015-04-01

    Full Text Available It is well established that arousal-induced memory enhancement requires noradrenergic activation of the basolateral complex of the amygdala (BLA and modulatory influences on information storage processes in its many target regions. While this concept is well accepted, the molecular basis of such BLA effects on neural plasticity changes within other brain regions remains to be elucidated. The present study investigated whether noradrenergic activation of the BLA after object recognition training induces chromatin remodeling through histone post-translational modifications in the insular cortex (IC, a brain region that is importantly involved in object recognition memory. Male Sprague–Dawley rats were trained on an object recognition task, followed immediately by bilateral microinfusions of norepinephrine (1.0 µg or saline administered into the BLA. Saline-treated control rats exhibited poor 24-h retention, whereas norepinephrine treatment induced robust 24-h object recognition memory. Most importantly, this memory-enhancing dose of norepinephrine induced a global reduction in the acetylation levels of histone H3 at lysine 14, H2B and H4 in the IC 1 h later, whereas it had no effect on the phosphorylation of histone H3 at serine 10 or tri-methylation of histone H3 at lysine 27. Norepinephrine administered into the BLA of non-trained control rats did not induce any changes in the histone marks investigated in this study. These findings indicate that noradrenergic activation of the BLA induces training-specific effects on chromatin remodeling mechanisms, and presumably gene transcription, in its target regions, which may contribute to the understanding of the molecular mechanisms of stress and emotional arousal effects on memory consolidation.

  9. Comparison of anterior cingulate versus insular cortex as targets for real-time fMRI regulation during pain stimulation

    Directory of Open Access Journals (Sweden)

    Kirsten eEmmert

    2014-10-01

    Full Text Available Real-time functional magnetic resonance imaging (rt-fMRI neurofeedback allows learning voluntary control over specific brain areas by means of operant conditioning and has been shown to decrease pain perception. To further increase the effect of rt-fMRI neurofeedback on pain, we directly compared two different target regions of the pain network i.e. the anterior insular cortex (AIC and the anterior cingulate cortex (ACC.Participants for this prospective study were randomly assigned to two age-matched groups of 14 participants each (7 females per group for AIC and ACC feedback. First, a functional localizer using block-design heat pain stimulation was performed to define the pain-sensitive target region within the AIC or ACC. Second, subjects were asked to down-regulate the feedback signal in four neurofeedback runs during identical pain stimulation. Data analysis included task-related and functional connectivity analysis.At the behavioral level, pain ratings significantly decreased during feedback versus localizer runs, but there was no difference between AIC and ACC groups. Concerning neuroimaging, ACC and AIC showed consistent involvement of the caudate nucleus for subjects that learned down-regulation (17/28 in both task-related and functional connectivity analysis. The functional connectivity towards the caudate nucleus is stronger for the ACC while the AIC is more heavily connected to the ventrolateral prefrontal cortex.Consequently, the ACC and AIC are suitable targets for real-time fMRI neurofeedback during pain perception as they both affect the caudate nucleus, although functional connectivity indicates that the direct connection seems to be stronger with the ACC. Additionally, the caudate, an important area involved in pain perception and suppression, could be a rt-fMRI target itself. Future studies are needed to identify parameters characterizing successful regulators and to assess the effect of repeated rt-fMRI neurofeedback on pain

  10. Insular dysfunction reflects altered between-network connectivity and severity of negative symptoms in schizophrenia during psychotic remission

    Directory of Open Access Journals (Sweden)

    Andrei eManoliu

    2013-05-01

    Full Text Available Schizophrenia is characterized by aberrant intrinsic functional connectivity (iFC within and between intrinsic connectivity networks (ICNs, including the Default Mode- (DMN, Salience- (SN and Central Executive Network (CEN. The anterior insula (AI of the SN has been demonstrated to modulate DMN/CEN interactions. Recently, we found that the dependence of DMN/CEN interactions on SN´s right AI activity is altered in patients with schizophrenia in acute psychosis and related to psychotic symptoms, indicating a link between aberrant AI, DMN, CEN and psychosis. However, since structural alterations of the insula are also present during psychotic remission and associated with negative symptoms, impaired AI interaction might be relevant even for psychotic remission and corresponding symptoms. Twelve patients with schizophrenia during psychotic remission and 12 healthy controls were assessed using resting-state fMRI and psychometric examination. High-model-order independent component analysis (ICA of fMRI data revealed ICNs including DMN, SN, and CEN. Scores of iFC within (intra-iFC and between (inter-iFC distinct subsystems of the DMN, SN and CEN were calculated, compared between groups and correlated with the severity of symptoms. Intra-iFC was altered in patients’ SN, DMN, and CEN, including decreased intra-iFC in the left AI within the SN. Patients’ inter-iFC between SN and CEN was increased and correlated with the severity of negative symptoms. Furthermore, decreased intra-iFC of the left AI correlated with both severity of negative symptoms and increased inter-iFC between SN and CEN. Our result provides first evidence for a relationship between AI dysfunction and altered between-network interactions in schizophrenia during psychotic remission, which is related to the severity of negative symptoms. Together with our previous results, data suggest specific SN/DMN/CEN reorganization in schizophrenia with distinct insular pathways for distinct

  11. Successful Aging among Elders Living in the Mani Continental Region vs. Insular Areas of the Mediterranean: the MEDIS Study.

    Science.gov (United States)

    Mariolis, Anargiros; Foscolou, Alexandra; Tyrovolas, Stefanos; Piscopo, Suzanne; Valacchi, Giuseppe; Tsakountakis, Nikos; Zeimbekis, Akis; Bountziouka, Vassiliki; Gotsis, Efthimios; Metallinos, George; Tyrovola, Dimitra; Tur, Josep-Antoni; Matalas, Antonia-Leda; Lionis, Christos; Polychronopoulos, Evangelos; Panagiotakos, Demosthenes

    2016-05-01

    To evaluate the role of geography i.e., continental vs. insular Mediterranean, on successful aging among older inhabitants. During 2005-2014, 2693 elderly (aged 65 to 100 years) individuals from 21 Mediterranean islands in Greece, Italy and Spain as well as Cyprus, Malta, and the rural region of Mani (southeast continental region of Greece keeping old-time traditions), were voluntarily recruited. Successful aging was evaluated using a validated index composed of 10 health-related socio-lifestyle and clinical characteristics. After accounting for age, sex, body mass index (BMI), physical activity, smoking habits, MedDietScore and access to health care services, the older inhabitants of islands were found to have a higher level of the successful aging index when compared to their counterparts in Mani (Beta=0.174, p<0.001); moreover, islanders exhibited slightly more years of "good" health (68.7 vs 68.4 years for Mani residents (p=0.99)). However, compared to the residents of Mani, islanders had 1.64 times higher odds (95%CI, 1.08-2.48) for having hypertension, 2.4-times higher odds (95%CI, 1.34-4.21) for having diabetes and 1.52 times higher odds (95%CI, 0.97-2.38) for having hypercholesterolemia. Engaging in physical activities and healthy dietary habits were the major determinants of healthy aging, among islanders as compared to their counterparts of continental Mani region. Elder residents of the continental Mani area enjoyed a better health status, whereas elder islanders had a higher level of successful aging; a finding which could be attributed to differences in lifestyle among elders. PMID:27330843

  12. Bilateral lesions in a specific subregion of posterior insular cortex impair conditioned taste aversion expression in rats.

    Science.gov (United States)

    Schier, Lindsey A; Blonde, Ginger D; Spector, Alan C

    2016-01-01

    The gustatory cortex (GC) is widely regarded for its integral role in the acquisition and retention of conditioned taste aversions (CTAs) in rodents, but large lesions in this area do not always result in CTA impairment. Recently, using a new lesion mapping system, we found that severe CTA expression deficits were associated with damage to a critical zone that included the posterior half of GC in addition to the insular cortex (IC) that is just dorsal and caudal to this region (visceral cortex). Lesions in anterior GC were without effect. Here, neurotoxic bilateral lesions were placed in the anterior half of this critical damage zone, at the confluence of the posterior GC and the anterior visceral cortex (termed IC2 ), the posterior half of this critical damage zone that contains just VC (termed IC3), or both of these subregions (IC2 + IC3). Then, pre- and postsurgically acquired CTAs (to 0.1 M NaCl and 0.1 M sucrose, respectively) were assessed postsurgically in 15-minute one-bottle and 96-hour two-bottle tests. Li-injected rats with histologically confirmed bilateral lesions in IC2 exhibited the most severe CTA deficits, whereas those with bilateral lesions in IC3 were relatively normal, exhibiting transient disruptions in the one-bottle sessions. Groupwise lesion maps showed that CTA-impaired rats had more extensive damage to IC2 than did unimpaired rats. Some individual differences in CTA expression among rats with similar lesion profiles were observed, suggesting idiosyncrasies in the topographic representation of information in the IC. Nevertheless, this study implicates IC2 as the critical zone of the IC for normal CTA expression.

  13. COMPARING THE BODY MASS VARIATIONS IN ENDEMIC INSULAR SPECIES OF THE GENUS PROLAGUS (OCHOTONIDAE, LAGOMORPHA IN THE PLEISTOCENE OF SARDINIA (ITALY

    Directory of Open Access Journals (Sweden)

    BLANCA MONCUNILL-SOLÉ

    2016-03-01

    Full Text Available Prolagus figaro and P. sardus are part of an endemic insular anagenetic lineage that populated Sardinia since the earliest Late Pliocene to Holocene. BM of some populations of these two species was calculated using regression models. The best BM proxies for Prolagus are: femur length, zeugopod measurements and distal humerus diameter. The anagenetic lineage show a BM increase of ca 20% from the populations of P. figaro (398−436 g to P. sardus (504−525 g. The trend shown by the size of lower third premolar, even if not directly comparable with BM, is opposite (ca -30% at the transition P. figaro−P. sardus. Compared to P. cf. calpensis, a continental species of similar age, BM of P. figaro is ca +25%. The comparison with the insular endemic P. apricenicus evidenced differences in BM range and timespan required to attain it, due to the different size and palaeogeographical situation of the islands. Insular endemic Prolagus follow the small mammal pattern of Island Rule. Mein’s (1983 biphasic model seems applicable to the evolution of P. figaro. A tachytelic phase followed by a bradytelic one seems to characterize also the appearance of P. sardus, at least for dental traits, a process probably triggered by important variations of abiotic and biotic traits of the environment, as indicated by the turnover that marks the onset of the Dragonara subcomplex. The prediction of life history traits and other biological attributes of Sardinian Prolagus using BM should be considered with caution due to the complexity of ecological selective regimes of Sardinia.

  14. Programa de detección precoz de la Diabetes Tipo 2 en el Cabildo Insular de Tenerife.

    Directory of Open Access Journals (Sweden)

    Carlos Manuel Reyes González

    2012-12-01

    Full Text Available La Promoción de la Salud en el Lugar de Trabajo se ha convertido en un pilar fundamental para el personal sanitario del Servicio de Prevención Propio del Excmo. Cabildo Insular de Tenerife como instrumento para capacitar a los empleados en el cuidado de su salud. Para ello, y vistos los datos epidemiológicos de la Diabetes Mellitus en Canarias, donde se estima que la prevalencia es del 6,5% en la población de 30 - 64 años, se elaboró y ejecutó el programa denominado. Día Mundial de la Diabetes: ¿Sabes si tienes azúcar?, con el lema “Más vale Pre-venir que No-venir”. Éste consistió en la medición de la glucemia capilar, la realización del Test de Findrisk (que valora el riesgo de padecer diabetes tipo 2 a lo largo de la vida y en la entrega de información sobre prevención y tratamiento de la diabetes, todo ello con el objetivo de dar a conocer y sensibilizar sobre esta “epidemia” a todos los empleados y de detectar sujetos con cifras alteradas de glucosa en sangre para su posterior derivación y control y realizar un seguimiento en nuestras consultas de aquellos empleados que obtuvieron en el Test un resultado de riesgo alto o muy alto. Objetivos principales: Dar a conocer la diabetes a los empleados del Cabildo Insular de Tenerife. Sensibilizar de la magnitud del problema de salud pública que supone la diabetes en Canarias. Sensibilizar sobre la importancia de la educación para la salud como instrumento de prevención y de detección precoz de la diabetes. Comparar los datos obtenidos de glucemia alterada en las analíticas de los reconocimientos médicos de vigilancia de la salud frente a los datos obtenidos en el Programa de Día Mundial de la Diabetes. Detección precoz de la Diabetes tipo 2 mediante: - La derivación a Atención Primaria de Salud de aquellos empleados con cifras alteradas de glucosa para estudio y tratamiento, si procede y seguimiento de los mismos por parte del personal sanitario del servicio de

  15. Epileptic seizure propagation from the second somatic sensory area to the fronto-medial region, by insular redistribution. A case report and a connectome description

    Directory of Open Access Journals (Sweden)

    Balogh Attila

    2015-06-01

    Full Text Available Introduction. The seizure propagation phenomenon by inducing remote symptoms brings several difficulties in finding the seizure onset and delineating the epileptic network which should be taken into consideration in epilepsy surgery. By demonstrating a difficult (MRI negative epilepsy surgery case explored with invasive presurgical evaluation we highlight the importance to recognise the secondary sensory area and to explore the the parieto-opercular-insular-medial frontal network in certain cases. A further conclusion is the consideration of the redistributory role of the insula as a special structure in the cerebral connectome, having a role in epileptic network organisation.

  16. Enhancement of Inhibitory Avoidance and Conditioned Taste Aversion Memory With Insular Cortex Infusions of 8-Br-cAMP: Involvement of the Basolateral Amygdala

    OpenAIRE

    Miranda, María I.; McGaugh, James L.

    2004-01-01

    There is considerable evidence that in rats, the insular cortex (IC) and amygdala are involved in the learning and memory of aversively motivated tasks. The present experiments examined the effects of 8-Br-cAMP, an analog of cAMP, and oxotremorine, a muscarinic agonist, infused into the IC after inhibitory avoidance (IA) training and during the acquisition/consolidation of conditioned taste aversion (CTA). Posttraining infusion into the IC of 0.3 μg oxotremorine and 1.25 μg 8-Br-cAMP enhanced...

  17. Single neurons in the insular cortex of a macaque monkey respond to skin brushing: preliminary data of the possible representation of pleasant touch

    Directory of Open Access Journals (Sweden)

    Laura Clara Grandi

    2016-05-01

    Full Text Available Pleasant touch may serve as a foundation for affiliative behavior, providing a mechanism for the formation and maintenance of social bonds among conspecifics. In humans, this touch is usually referred to as the caress. Dynamic caressing performed on the hairy skin with a velocity of 1–10 cm/sec is perceived as being pleasant and determines positive cardio-physiological effects. Furthermore, imaging human studies show that affiliative touch activates the posterior insular cortex.Recently, it was demonstrated that pleasant touch in monkeys (i.e. sweeping in a grooming-like manner is performed with velocities similar to those characteristics of human caress (9.31 cm/sec, and causes similarly positive autonomic effects, if performed with velocity of 5 cm/sec and 10 cm/sec, but not lower or higher. Due to similarities between the human caress and non-human primate sweeping, we investigated for the first time whether single neurons of the perisylvian regions (secondary somatosensory cortex and posterior insular cortex of a rhesus monkey can process sweeping touch differently depending on the stimulus speed. We applied stimulation with two speeds: one that optimally induce positive cardio-physiological effects in the monkey who receives it, and includes the real speed of sweep (5-15 cm/sec, sweep fast, and a non-optimal speed (1-5 cm/sec, sweep slow.The results show that single neurons of insular cortex differently encode the stimulus speed. In particular, even the majority of recorded somatosensory neurons (82% did not discriminate the two speeds, a small set of neurons (18% were modulated just during the sweep fast. These findings represent the first evidence that single neurons of the non-human primates insular cortex can code affiliative touch, highlighting the similarity between human and non-human primates’ social touch systems. This study constitutes an important starting point to carry out deeper investigation on neuronal processing of

  18. Survival and hsp70 gene expression in Plutella xylostella and its larval parasitoid Diadegma insulare varied between slowly ramping and abrupt extreme temperature regimes.

    Directory of Open Access Journals (Sweden)

    Md Habibullah Bahar

    Full Text Available BACKGROUND: In nature, insects have evolved behavioural and physiological adaptations to cope with short term exposure to extreme temperatures. Extreme heat events may increase as a result of climate change; this in turn will affect insect population dynamics. We examined the effect of abrupt and ecologically relevant gradual exposure to high temperatures on the survival and hsp70 gene expression in diamondback moth (DBM adults and the parasitoid Diadegma insulare, as well as in parasitized and non-parasitized DBM larvae. PRINCIPAL FINDINGS: Tolerance to high temperatures in DBM adults was higher than in D. insulare adults. There was no difference in the survival of DBM adults between abrupt and ramped increases from 25 to 38°C; however, at 40°C survival was higher when the temperature increased gradually. In contrast, more D. insulare adults survived when the temperature was ramped rather than shifted abruptly to both 38 and 40°C. There was no heat stress effect of up to 40°C on the survival of either parasitized or non-parasitized DBM larvae. In adults of both species, more hsp70 expression was observed when temperatures increased abruptly to 38°C compared to ramping. In contrast, at 40°C significantly more expression was found in insects exposed to the ramping rather than the abrupt regime. Hsp70 expression level was in agreement with adult survival data and appears to be a good indicator of stress levels. In parasitized and non-parasitized larvae, hsp70 expression was significantly higher after abrupt shifts compared to ramping at both temperatures. CONCLUSIONS/SIGNIFICANCE: Hsp70 gene expression was responsive to extreme temperatures in both DBM and D. insulare, which may underlie the ability of these insects to survive in extreme temperatures. Survival and hsp70 expression upon abrupt changes are distinctly different from those after ramping indicating that experimental protocol must be considered before extrapolating laboratory

  19. Variabilidad de la clorofila a fitoplanctónica y de los nutrientes inorgánicos en aguas de la plataforma insular de las Islas Baleares

    OpenAIRE

    J. Jansá; Aparicio-González, A.; Amengual, B. (Bartolomé)

    2009-01-01

    A lo largo de cuatro campañas llevadas a cabo en abril, julio y octubre de 2008 y marzo de 2009, se han tomado nuevos datos de clorofila a y nutrientes inorgánicos (nitratos, nitritos, fosfatos y silicatos), en diversas estaciones oceanográficas distribuidas en aguas de las plataformas insulares de Mallorca, Menorca e Ibiza, a tres niveles de profundidad (5, 25 y 50m o en las proximidades del fondo en algunos casos). Poniendo especial énfasis en la variabilidad estacional de la clorofila a (b...

  20. Ecología e impacto de los mamíferos invasores en ecosistemas insulares: la isla de Corvo, Archipiélago de las Azores

    OpenAIRE

    Hervías Parejo, Sandra

    2014-01-01

    Tesis por compendio de publicaciones Esta investigación se ha centrado en analizar el impacto directo e indirecto de los tres mamíferos invasores más comunes en los ecosistemas insulares (el ratón casero Mus domesticus, la rata negra Rattus rattus y el gato Felis silvestris catus), sobre la pardela cenicienta (Calonectris diomedea borealis). El trabajo se ha desarrollado en Corvo, que es la isla más remota del Archipiélago de las Azores y la última en ser descubierta y colonizada, por lo q...

  1. Introducing the context : local and international trends at the Dictionary of Danish Insular Dialects in the 1920s and 1930s

    DEFF Research Database (Denmark)

    Hovmark, Henrik

    2010-01-01

    The Dictionary of Danish Insular Dialects (DID; in Danish: Ømålsordbogen) describes Danish dialects on Zealand, Funen and surrounding islands. It covers the period from 1750 to 1945, the core period being 1850 to 1920. Publishing began in 1992. Since then, a volume has appeared biannually...... to the dialectal vocabulary. In this presentation, however, I shall show that other scientific trends also made an important imprint on the new tools and the final planning of the dictionary. For instance, the keen interest in material culture and terminology had strong paralles within ethnology (for instance...

  2. Development of Monte Carlo depletion code MCDEP

    Energy Technology Data Exchange (ETDEWEB)

    Kim, K. S.; Kim, K. Y.; Lee, J. C.; Ji, S. K. [KAERI, Taejon (Korea, Republic of)

    2003-07-01

    Monte Carlo neutron transport calculation has been used to obtain a reference solution in reactor physics analysis. The typical and widely-used Monte Carlo transport code is MCNP (Monte Carlo N-Particle Transport Code) developed in Los Alamos National Laboratory. The drawbacks of Monte-Carlo transport codes are the lacks of the capacities for the depletion and temperature dependent calculations. In this research we developed MCDEP (Monte Carlo Depletion Code Package) using MCNP with the capacity of the depletion calculation. This code package is the integration of MCNP and depletion module of ORIGEN-2 using the matrix exponential method. This code package enables the automatic MCNP and depletion calculations only with the initial MCNP and MCDEP inputs prepared by users. Depletion chains were simplified for the efficiency of computing time and the treatment of short-lived nuclides without cross section data. The results of MCDEP showed that the reactivity and pin power distributions for the PWR fuel pins and assemblies are consistent with those of CASMO-3 and HELIOS.

  3. Approaching Chemical Accuracy with Quantum Monte Carlo

    CERN Document Server

    Petruzielo, F R; Umrigar, C J

    2012-01-01

    A quantum Monte Carlo study of the atomization energies for the G2 set of molecules is presented. Basis size dependence of diffusion Monte Carlo atomization energies is studied with a single determinant Slater-Jastrow trial wavefunction formed from Hartree-Fock orbitals. With the largest basis set, the mean absolute deviation from experimental atomization energies for the G2 set is 3.0 kcal/mol. Optimizing the orbitals within variational Monte Carlo improves the agreement between diffusion Monte Carlo and experiment, reducing the mean absolute deviation to 2.1 kcal/mol. Moving beyond a single determinant Slater-Jastrow trial wavefunction, diffusion Monte Carlo with a small complete active space Slater-Jastrow trial wavefunction results in near chemical accuracy. In this case, the mean absolute deviation from experimental atomization energies is 1.2 kcal/mol. It is shown from calculations on systems containing phosphorus that the accuracy can be further improved by employing a larger active space.

  4. Quantum Monte Carlo with Variable Spins

    CERN Document Server

    Melton, Cody A; Mitas, Lubos

    2016-01-01

    We investigate the inclusion of variable spins in electronic structure quantum Monte Carlo, with a focus on diffusion Monte Carlo with Hamiltonians that include spin-orbit interactions. Following our previous introduction of fixed-phase spin-orbit diffusion Monte Carlo (FPSODMC), we thoroughly discuss the details of the method and elaborate upon its technicalities. We present a proof for an upper-bound property for complex nonlocal operators, which allows for the implementation of T-moves to ensure the variational property. We discuss the time step biases associated with our particular choice of spin representation. Applications of the method are also presented for atomic and molecular systems. We calculate the binding energies and geometry of the PbH and Sn$_2$ molecules, as well as the electron affinities of the 6$p$ row elements in close agreement with experiments.

  5. Yours in Revolution: Retrofitting Carlos the Jackal

    Directory of Open Access Journals (Sweden)

    Samuel Thomas

    2013-09-01

    Full Text Available This paper explores the representation of ‘Carlos the Jackal’, the one-time ‘World’s Most Wanted Man’ and ‘International Face of Terror’ – primarily in cin-ema but also encompassing other forms of popular culture and aspects of Cold War policy-making. At the centre of the analysis is Olivier Assayas’s Carlos (2010, a transnational, five and a half hour film (first screened as a TV mini-series about the life and times of the infamous militant. Concentrating on the var-ious ways in which Assayas expresses a critical preoccupation with names and faces through complex formal composition, the project examines the play of ab-straction and embodiment that emerges from the narrativisation of terrorist vio-lence. Lastly, it seeks to engage with the hidden implications of Carlos in terms of the intertwined trajectories of formal experimentation and revolutionary politics.

  6. Monte Carlo strategies in scientific computing

    CERN Document Server

    Liu, Jun S

    2008-01-01

    This paperback edition is a reprint of the 2001 Springer edition This book provides a self-contained and up-to-date treatment of the Monte Carlo method and develops a common framework under which various Monte Carlo techniques can be "standardized" and compared Given the interdisciplinary nature of the topics and a moderate prerequisite for the reader, this book should be of interest to a broad audience of quantitative researchers such as computational biologists, computer scientists, econometricians, engineers, probabilists, and statisticians It can also be used as the textbook for a graduate-level course on Monte Carlo methods Many problems discussed in the alter chapters can be potential thesis topics for masters’ or PhD students in statistics or computer science departments Jun Liu is Professor of Statistics at Harvard University, with a courtesy Professor appointment at Harvard Biostatistics Department Professor Liu was the recipient of the 2002 COPSS Presidents' Award, the most prestigious one for sta...

  7. CosmoPMC: Cosmology Population Monte Carlo

    CERN Document Server

    Kilbinger, Martin; Cappe, Olivier; Cardoso, Jean-Francois; Fort, Gersende; Prunet, Simon; Robert, Christian P; Wraith, Darren

    2011-01-01

    We present the public release of the Bayesian sampling algorithm for cosmology, CosmoPMC (Cosmology Population Monte Carlo). CosmoPMC explores the parameter space of various cosmological probes, and also provides a robust estimate of the Bayesian evidence. CosmoPMC is based on an adaptive importance sampling method called Population Monte Carlo (PMC). Various cosmology likelihood modules are implemented, and new modules can be added easily. The importance-sampling algorithm is written in C, and fully parallelised using the Message Passing Interface (MPI). Due to very little overhead, the wall-clock time required for sampling scales approximately with the number of CPUs. The CosmoPMC package contains post-processing and plotting programs, and in addition a Monte-Carlo Markov chain (MCMC) algorithm. The sampling engine is implemented in the library pmclib, and can be used independently. The software is available for download at http://www.cosmopmc.info.

  8. SPQR: a Monte Carlo reactor kinetics code

    International Nuclear Information System (INIS)

    The SPQR Monte Carlo code has been developed to analyze fast reactor core accident problems where conventional methods are considered inadequate. The code is based on the adiabatic approximation of the quasi-static method. This initial version contains no automatic material motion or feedback. An existing Monte Carlo code is used to calculate the shape functions and the integral quantities needed in the kinetics module. Several sample problems have been devised and analyzed. Due to the large statistical uncertainty associated with the calculation of reactivity in accident simulations, the results, especially at later times, differ greatly from deterministic methods. It was also found that in large uncoupled systems, the Monte Carlo method has difficulty in handling asymmetric perturbations

  9. Iglesia y participación comunitaria en salud: el caso del Municipio San Francisco del estado Zulia, Venezuela

    Directory of Open Access Journals (Sweden)

    José Guillermo García

    2002-01-01

    Full Text Available Este trabajo tiene por objeto identificar en forma comparada los factores que condicionan la participación de las comunidades Betulio González y 24 de Julio del municipio San Francisco del estado Zulia en el subprograma de Medicina Natural que promociona la Iglesia Católica. Bajo un esquema conceptual que combina principios de las teorías: Elección Racional, Movilización de Recursos, Privación Relativa, Identidades Colectivas y Capital Social, se plantea la hipótesis que la participación de dichas comunidades en el subprograma está determinada por una serie de factores internos y externos en donde resaltan la representación social que tienen del subprograma, el cálculo racional de la acción, la tradición participativa y el apoyo organizativo de grupos voluntarios. Se empleó la perspectiva etnomedotológica en la realización de entrevistas en profundidad, de donde se extrajo como conclusión que existen factores comunes que condicionan la participación en ambas comunidades, tales como la reafirmación de una identidad femenina entendida como un incentivo para la acción, una representación colectiva positiva sobre la medicina natural y la presencia de recursos organizativos externos proporcionados por las escuelas ubicadas en cada comunidad, por grupos eclesiales de base y por la misma Iglesia Católica como agente promotor del subprograma.

  10. DIAGNÓSTICO DE LA CAPACIDAD REPRODUCTIVA DE TOROS EN GANADERÍAS DE TRES MUNICIPIOS DEL ALTO MAGDALENA

    Directory of Open Access Journals (Sweden)

    Vejarano OA

    2005-12-01

    Full Text Available El objetivo del estudio fue evaluar la funcionalidad reproductiva de toros del alto magdalena analizandoel efecto de la edad y la raza sobre la calidad del semen y otras características reproductivas. La investigaciónse realizó en los municipios de Paicol, La Plata y Nátaga (Huila - Colombia, cubriendo zonas de bosqueseco tropical (bs-T y bosque húmedo premontano (bh-PM. 60 toros de diferentes razas y edades fueronevaluados bajo condiciones de monta natural y sin reposo sexual previo al examen, usando la metodologíarecomendada por la American Society of Therigenology (AST. Para evaluar el efecto del tipo racial sobrealgunas características reproductivas se utilizó un diseño completamente al azar con tres tratamientos ydiferentes número de repeticiones por tratamiento: T1: Bos indicus , T2: Bos indicus x Bos taurus y T3: Bostaurus . El efecto de la edad fue determinado estableciendo un diseño con siete tratamientos y diferentenúmero de repeticiones por tratamientoí: T1: 54 meses de edad. Se aplicó la prueba Diferencia Mínima Significativa para determinarlas diferencias estadísticas y se estableció un modelo de predicción para movilidad masal. Elcomportamiento reproductivo expresado en calidad del material seminal, libido y demás característicasreproductivas en los toros del alto magdalena, estuvo dentro de los valores normales. El tipo racial notuvo un efecto significativo sobre las características reproductivas. Con excepción de la circunferenciaescrotal y el volumen del eyaculado, la edad tampoco ejerció un efecto sobre las variables analizadas. Elmodelo de predicción para la movilidad masal (Y, a partir de un valor dado de circunferencia escrotal (Xes: Y = (1.90275 (X.

  11. Factores de riesgo para la enteropatía parasitaria en niños del municipio Las Tunas

    Directory of Open Access Journals (Sweden)

    Arley Fajardo Ochoa

    2015-11-01

    Full Text Available Se realizó un estudio analítico de tipo caso control, con el objetivo de determinar los factores de riesgo para la enteropatía parasitaria, como principal causa del síndrome de malabsorción intestinal en niños del municipio de Las Tunas durante el año 2011. El mismo fue realizado en el Hospital Pediátrico Provincial “Mártires de Las Tunas”, con una muestra de 87 pacientes que formaron parte del grupo de estudio, cuyos datos se recolectaron de la consulta médica de gastroenterología en el policlínico de consulta externa de dicha unidad asistencial y 174 en el grupo control, tomados de pacientes que acudieron a la consulta de urología, paralela en tiempo y contigua a la de gastroenterología. A cada grupo se le realizó un interrogatorio y examen físico exhaustivo, que permitió recoger todos los posibles factores de riesgo existentes. Para la determinación de los factores de riesgo se utilizaron los paquetes de programas estadísticos Epinfo versión 6, en el que se realizaron análisis univariados y se evaluó el ODDS RATIO, intervalo de confianza y probabilidad. El procesamiento de los datos se realizó con un 95% de confiabilidad. Los factores de riesgo asociados a la enteropatía parasitaria fueron: pertenecer al sexo masculino, los hábitos higiénicos inadecuados, estado nutricional inadecuado, la ingestión de agua sin hervir y la evacuación de excretas no sanitarias. Se recomienda realizar estudios analíticos para determinar la asociación de otros factores de riesgo, con vistas a establecer programas de intervención en estos pacientes.

  12. SISTEMA AGROFORESTAL PARA EL USO RACIONAL DEL SUELO EN EL MUNICIPIO SAN JOSÉ DE LAS LAJAS, PROVINCIA MAYABEQUE

    Directory of Open Access Journals (Sweden)

    María I. Pavón Rosales

    2014-01-01

    Full Text Available La investigación se realizó en la Finca Forestal Integral (FFI no. 8 del municipio San José de las Lajas provincia Mayabeque, durante los años 2008-2010 con el objetivo de evaluar la incidencia de un Sistema Agroforestal (SAF como alternativa para el uso eficiente del suelo. La metodología de estudio se fundamentó en los principios de la agroecología y se diseñó a partir de la concepción de las FFI, además de la integración de métodos de diagnóstico utilizados en diferentes metodologías para lograr los objetivos propuestos. Se ejecutaron tres etapas que comenzaron con la caracterización edafológica del área de estudio, diagnóstico integral de la finca, además del establecimiento y evaluación de técnicas agroforestales en función del uso racional y eficiente del recurso suelo. Los resultados permitieron reconocer las principales limitaciones y potencialidades de la finca, que hicieron posible la definición, establecimiento y evaluación de técnicas agroforestales como parte de un SAF para el uso racional del suelo. En este contexto la técnica del cultivo en callejones o asociación de especies arbóreas con cultivosanuales, contribuyó al aumento de la eficiencia en el uso de la tierra y la agrobiodiversidad del ecosistema estudiado.

  13. Caracterización de los sistemas de producción (Agroecosistemas del municipio de Mariquita y sus alrededores

    Directory of Open Access Journals (Sweden)

    Vargas Orlando

    2000-12-01

    Full Text Available

    En el municipio de Mariquita se llevo a cabo la caracterización de los sistemas de producción, para lo cual se realizaron entrevistas informales y encuestas, siguiendo el formato de evaluación ecológica rápida, a técnicos de la UMATA, funcionarios de la alcaldía, secretaria de educación y de salud, empleados del hospital y al párroco, así como a campesinos y hacendados de la región. La información recolectada fue procesada en forma cualitativa; posteriormente se elaboraron los modelos de los sistemas de producción. Se observaron cuatro agroecosistemas predominantes: frutales, ganadero, caña panelera, y café, se encontró que los dos primeros están asociados a una tenencia de la tierra de tipo latifundista, en la cual se da, especialmente en el caso de la ganadería, una forma de exploración de la tierra que ocasiona problemas de tipo social y ecológico, mientras que el de la caña panelera y el del café se presentan en áreas donde predominan predios pequeños; el sistema de la caña panelera presenta problemas de tipo socioambiental debido a la baja rentabilidad y al tipo de insumos que se utilizan para la elaboración de la panela.

  14. Correspondencia epistolar de Carlos Vicioso a Carlos Pau durante su estancia en Bicorp (Valencia [Epistolary correspondece between Carlos Vicioso and Carlos Pau during a stay in Bicorp (Valencia

    Directory of Open Access Journals (Sweden)

    Pedro Pablo Ferrer Gallego

    2012-07-01

    Full Text Available RESUMEN: Se presenta y comenta un conjunto de cartas enviadas por Carlos Vicioso a Carlos Pau durante su estancia en Bicorp (Valencia entre 1914 y 1915. Las cartas se encuentran depositadas en el Archivo Histórico del Instituto Botánico de Barcelona. Esta correspondencia epistolar marca el comienzo de la relación científica entre Vicioso y Pau, basada en un primer momento en las consultas que le hace Vicioso al de Segorbe para la determinación de las especies que a través de pliegos de herbario envía desde su estancia en la localidad valenciana. En la actualidad estos pliegos testigo se encuentran conservados en diferentes herbarios oficiales nacionales y también extranjeros, fruto del envío e intercambio de material entre Vicioso y otros botánicos de la época, principalmente con Pau, Sennen y Font Quer.ABSTRACT: Epistolary correspondece between Carlos Vicioso and Carlos Pau during a stay in Bicorp (Valencia. A set of letters sent from Carlos Vicioso to Carlos Pau during a stay in Bicorp (Valencia between 1914 and 1915 are here presented and discussed. The letters are located in the Archivo Histórico del Instituto Botánico de Barcelona. This lengthy correspondence among the authors shows the beginning of their scientific relationship. At first, the correspondence was based on the consults from Vicioso to Pau for the determination of the species which were sent from Bicorp, in the herbarium sheets. Nowadays, these witness sheets are preserved in the national and international herbaria, thanks to the botanical material exchange among Vicioso and other botanist of the time, mainly with Pau, Sennen and Font Quer.

  15. Yours in revolution : retrofitting Carlos the Jackal.

    OpenAIRE

    Samuel Thomas

    2013-01-01

    This paper explores the representation of ‘Carlos the Jackal’, the one-time ‘World’s Most Wanted Man’ and ‘International Face of Terror’ – primarily in cin-ema but also encompassing other forms of popular culture and aspects of Cold War policy-making. At the centre of the analysis is Olivier Assayas’s Carlos (2010), a transnational, five and a half hour film (first screened as a TV mini-series) about the life and times of the infamous militant. Concentrating on the var-ious ways in which Assa...

  16. Geodesic Monte Carlo on Embedded Manifolds.

    Science.gov (United States)

    Byrne, Simon; Girolami, Mark

    2013-12-01

    Markov chain Monte Carlo methods explicitly defined on the manifold of probability distributions have recently been established. These methods are constructed from diffusions across the manifold and the solution of the equations describing geodesic flows in the Hamilton-Jacobi representation. This paper takes the differential geometric basis of Markov chain Monte Carlo further by considering methods to simulate from probability distributions that themselves are defined on a manifold, with common examples being classes of distributions describing directional statistics. Proposal mechanisms are developed based on the geodesic flows over the manifolds of support for the distributions, and illustrative examples are provided for the hypersphere and Stiefel manifold of orthonormal matrices. PMID:25309024

  17. Monte Carlo dose computation for IMRT optimization*

    Science.gov (United States)

    Laub, W.; Alber, M.; Birkner, M.; Nüsslin, F.

    2000-07-01

    A method which combines the accuracy of Monte Carlo dose calculation with a finite size pencil-beam based intensity modulation optimization is presented. The pencil-beam algorithm is employed to compute the fluence element updates for a converging sequence of Monte Carlo dose distributions. The combination is shown to improve results over the pencil-beam based optimization in a lung tumour case and a head and neck case. Inhomogeneity effects like a broader penumbra and dose build-up regions can be compensated for by intensity modulation.

  18. Monte Carlo simulation of granular fluids

    CERN Document Server

    Montanero, J M

    2003-01-01

    An overview of recent work on Monte Carlo simulations of a granular binary mixture is presented. The results are obtained numerically solving the Enskog equation for inelastic hard-spheres by means of an extension of the well-known direct Monte Carlo simulation (DSMC) method. The homogeneous cooling state and the stationary state reached using the Gaussian thermostat are considered. The temperature ratio, the fourth velocity moments and the velocity distribution functions are obtained for both cases. The shear viscosity characterizing the momentum transport in the thermostatted case is calculated as well. The simulation results are compared with analytical predictions showing an excellent agreement.

  19. Monte carlo simulations of organic photovoltaics.

    Science.gov (United States)

    Groves, Chris; Greenham, Neil C

    2014-01-01

    Monte Carlo simulations are a valuable tool to model the generation, separation, and collection of charges in organic photovoltaics where charges move by hopping in a complex nanostructure and Coulomb interactions between charge carriers are important. We review the Monte Carlo techniques that have been applied to this problem, and describe the results of simulations of the various recombination processes that limit device performance. We show how these processes are influenced by the local physical and energetic structure of the material, providing information that is useful for design of efficient photovoltaic systems.

  20. Monte Carlo dose distributions for radiosurgery

    Energy Technology Data Exchange (ETDEWEB)

    Perucha, M.; Leal, A.; Rincon, M.; Carrasco, E. [Sevilla Univ. (Spain). Dept. Fisiologia Medica y Biofisica; Sanchez-Doblado, F. [Sevilla Univ. (Spain). Dept. Fisiologia Medica y Biofisica]|[Hospital Univ. Virgen Macarena, Sevilla (Spain). Servicio de Oncologia Radioterapica; Nunez, L. [Clinica Puerta de Hierro, Madrid (Spain). Servicio de Radiofisica; Arrans, R.; Sanchez-Calzado, J.A.; Errazquin, L. [Hospital Univ. Virgen Macarena, Sevilla (Spain). Servicio de Oncologia Radioterapica; Sanchez-Nieto, B. [Royal Marsden NHS Trust (United Kingdom). Joint Dept. of Physics]|[Inst. of Cancer Research, Sutton, Surrey (United Kingdom)

    2001-07-01

    The precision of Radiosurgery Treatment planning systems is limited by the approximations of their algorithms and by their dosimetrical input data. This fact is especially important in small fields. However, the Monte Carlo methods is an accurate alternative as it considers every aspect of particle transport. In this work an acoustic neurinoma is studied by comparing the dose distribution of both a planning system and Monte Carlo. Relative shifts have been measured and furthermore, Dose-Volume Histograms have been calculated for target and adjacent organs at risk. (orig.)

  1. Monte Carlo simulation of neutron scattering instruments

    International Nuclear Information System (INIS)

    A library of Monte Carlo subroutines has been developed for the purpose of design of neutron scattering instruments. Using small-angle scattering as an example, the philosophy and structure of the library are described and the programs are used to compare instruments at continuous wave (CW) and long-pulse spallation source (LPSS) neutron facilities. The Monte Carlo results give a count-rate gain of a factor between 2 and 4 using time-of-flight analysis. This is comparable to scaling arguments based on the ratio of wavelength bandwidth to resolution width

  2. Monte Carlo dose distributions for radiosurgery

    International Nuclear Information System (INIS)

    The precision of Radiosurgery Treatment planning systems is limited by the approximations of their algorithms and by their dosimetrical input data. This fact is especially important in small fields. However, the Monte Carlo methods is an accurate alternative as it considers every aspect of particle transport. In this work an acoustic neurinoma is studied by comparing the dose distribution of both a planning system and Monte Carlo. Relative shifts have been measured and furthermore, Dose-Volume Histograms have been calculated for target and adjacent organs at risk. (orig.)

  3. Evaluación de anemia ferropénica en la primera infancia del Municipio de Sonsón-Antioquia, 2007

    Directory of Open Access Journals (Sweden)

    Tulia Isabel Castillo Salgado

    2016-08-01

    Full Text Available Objetivo: Determinar la prevalencia de anemia por deficiencia de hierro en niños de la primera infancia del municipio de Sonsón – Antioquia, en el año 2007. Metodología: Se realizó un estudio descriptivo transversal en 391 niños de 0 a 84 meses de edad del Municipio de Sonsón, Antioquia. Se estudiaron los parámetros de hemoglobina y ferritina sérica utilizando puntos de corte de la Organización Mundial de la Salud (OMS. Se calcularon las medidas de frecuencia y de resumen y los intervalos de confianza para proporciones y las pruebas de estadística paramétrica y no paramétrica. Resultados: La prevalencia de anemia ferropénica fue de 4,3% y la media de ferritina sérica y de hemoglobina para la población del estudio fue de 29,9 ng/mL y 12,6 g/dL respectivamente. Adicionalmente se halló significancia estadística de la prevalencia de anemia ferropénica por grupo de edad (p<0,0001; pero no se encontró significancia estadística de la  prevalencia de anemia con el sexo (p= 1,0000.  Conclusión: La prevalencia de anemia ferropénica en los niños de la primera infancia del Municipio de Sonsón fue baja de acuerdo con los parámetros de hemoglobina y ferritina sérica establecidos por la OMS, hay variación de la anemia ferropénica por grupo de edad pero no por sexo.

  4. Un estudio ecológico sobre tuberculosis en un municipio de Cuba An ecologic study on tuberculosis in a Cuban municipality

    Directory of Open Access Journals (Sweden)

    Ivette Molina Serpa

    2003-10-01

    Full Text Available Se aplica un estudio ecológico para analizar la incidencia de tuberculosis en el municipio Marianao de la provincia Ciudad de La Habana de la República de Cuba en el período 1995-2000. Se realiza una caracterización de tal incidencia, se identifican patrones de distribución espacial y se determina la relación existente entre los niveles de incidencia de tuberculosis y factores del medio ambiente socioeconómico. La unidad espacial considerada son los 29 barrios del municipio Marianao. Entre otros resultados se identifica un patrón de barrios con tasas altas en la región central del municipio. Las tasas de incidencia se hallan significativamente asociadas de forma directa con el porcentaje de familias con problemas disfuncionales y con el porcentaje de población con determinados niveles de hacinamiento, y de manera inversa con la densidad poblacional, y no se encuentran significativamente asociadas ni con los niveles de educación, ni con el estado de la vivienda predominantes en el barrio.An ecological study analyzes tuberculosis incidence in the municipality of Marianao, Havana City Province, Cuba. The study characterizes tuberculosis incidence, identifies spatial distribution patterns, and relates tuberculosis incidence rates to socioeconomic factors. The spatial units are the 29 neighborhoods in the municipality of Marianao. A pattern of neighborhoods with high rates located in the central region of the municipality is identified. Incidence rates are directly (and significantly related to the percentage of families presenting dysfunctional problems and the percentage of the population with certain levels of overcrowding and inversely related to population density, while not significantly associated with level of schooling or prevailing housing conditions.

  5. El conocimiento local en la gestión del riesgo de inundaciones: comunidades del municipio de Mompós Bolívar

    OpenAIRE

    Mojica Velez, Jose Manuel

    2013-01-01

    Resumen: La investigación explora el conocimiento local y la capacidad adaptativa de las comunidades de Las Boquillas y del barrio Faciolince del municipio de Mompós frente a las inundaciones. La finalidad que tiene es determinar cómo los conocimientos y las capacidades que tienen las comunidades se pueden incorporar en la gestión local del riesgo. La metodología utilizada fue la Investigación-Acción-Participación, las técnicas aplicadas fueron cartografía social, calendario estacional, línea...

  6. Contribución de las actividades de marketing aplicadas en las fundaciones en el municipio de Arauca a la estrategia de competitividad y autosostenibilidad - estudio de caso

    OpenAIRE

    López Céspedes, Martha Inés

    2013-01-01

    Las empresas del tercer sector han tenido un auge al interior de la literatura debido a su contribución a la economía de los países y su enfoque social de beneficio para la sociedad. La sostenibilidad de estas organizaciones depende de diferentes factores, entre ellos, la competitividad y el marketing que realizan para encontrar el apoyo y la cooperación de aliados. El presente estudio aborda el caso de la Fundación El Alcaraván del municipio de Arauca en donde se analiza la contribución de l...

  7. Evaluación de la calidad del agua superficial y subterránea utilizada para el consumo del ganado bovino en un municipio de provincia Habana

    OpenAIRE

    Soca Pérez Maylin, MSc, Pérez Liumar, Dr MV*; Soca Pérez Mildrey, MSc, DrC.**,; Martínez Santiesteban José A, DrC.; Suárez Fernandez Yolanda. E, DrC; Fuentes Cintra Maritza, MSc.

    2006-01-01

    El presente trabajo se realizó en un municipio de provincia Habana, con el objetivo de evaluar la contaminación del agua que se usa para el consumo de los animales y la limpieza del equipo de ordeño. Se trabajaron seis fuentes de agua que abastecen a igual cantidad de unidades ganaderas, tres de las cuales corresponden a fuentes de aguas superficiales (micropresas) y otras tres a aguas subterráneas (pozos). Se tomaron muestras en cada una de las zonas bajo estudio, las mismas se realizaro...

  8. Factores críticos para la medición de la calidad de servicio del aseo urbano en el municipio Maracaibo

    OpenAIRE

    Alejandrina Sáez

    2011-01-01

    El objetivo de la presente investigación consiste en determinar los factores críticos para medir la calidad percibida por los usuarios del servicio de aseo urbano domiciliario en el Municipio Maracaibo. Previa revisión documental sobre calidad de servicio y aseo urbano, se diseñó una escala estructurada tomando como base el modelo SERVPEF y adicionando una dimensión para medir la incidencia de la participación ciudadana en la calidad del servicio. Para obtener la data de la prueba piloto y...

  9. La actual concentración de la propiedad rústica y su riqueza catastral en los municipios de España

    OpenAIRE

    Pillet Capdepón, Félix

    2008-01-01

    Estudio geográfico sobre la concentración de la propiedad rústica y la riqueza catastral de la tierra, basado en las estadísticas de todos los municipios de España, y con concreción en aquéllos con mayores niveles en ambos indicadores. Se han utilizado dos fuentes de datos: en primer lugar, el Catastro de Rústica de la Dirección General del Catastro para aquellas comunidades autónomas con un sistema fiscal normalizado; y en segundo lugar, información aportada por las diputaciones forales de l...

  10. Estrategia de intervención sobre sexualidad e infecciones de transmisión sexual en adolescentes municipio Quime, Bolivia.2010

    OpenAIRE

    Yacquelynes Corona-Hechavarria; Caridad Mastrapa-Reyes

    2012-01-01

    Aborda un estudio de intervención para evaluar el conocimiento sobre sexualidad e infecciones de transmisión sexual de adolescentes del municipio Quime, La Paz Bolivia en el año 2010 .El universo estuvo constituido por 81 adolescentes, de ellos 43 constituyeron la muestra. Se aplicó una encuesta antes y después del programa de intervención.Predominó el grupo de edades de de 16 a 17 años y el sexo masculino Al inicio la mayoría no habían tenido relaciones sexuales y posterior a la implantación...

  11. Evaluación de la planta de potabilización de agua del municipio de Villamaría Aquamana S.A.

    OpenAIRE

    Garzón Varón, Oscar Andrés; Rosas Osorio, Wilkinson

    2003-01-01

    En este documento se presentan los procedimientos seguidos y resultados obtenidos en la evacuación realizada a la planta de potabilización de agua de la empresa de acueducto del municipio de Villamaría (Caldas) desarrollando la metodología establecida por la Organización Mundial de la Salud (O.M.S.), la Organización Panamericana de la Salud (O.P.S.), el CEPIS y acogida por el Ministerio de Salud de Colombia en el año de 1989, para la Evaluación, Operación y Mantenimiento de plantas de tratami...

  12. Inventario de emisiones y Plan de Acción para la Energía Sostenible del municipio de Cartagena

    OpenAIRE

    Mercader Siles, Patricio

    2012-01-01

    El presente Plan ha sido elaborado por la adhesión voluntaria a la iniciativa europea “Pacto de los Alcaldes”, a través de la cual el municipio de Cartagena hace suyos los objetivos marcados por la Unión Europea en materia de reducción de emisiones de gases de efecto invernadero de reducir dichas emisiones en un 20% para el año 2020. Este Plan de Acción se divide en dos partes bien diferenciadas, en primer lugar un inventario de consumo de energía en el término municipal y las emi...

  13. Evaluación del programa de actividad física jugada, dentro del programa integral de deporte escolar del municipio de Segovia (PIDEMSG)

    OpenAIRE

    Pérez Mate, Verónica

    2014-01-01

    El presente estudio se basa en la evaluación del cuarto curso del programa de Actividad Física Jugada (PAFJ) dentro del Programa Integral de Deporte Escolar del Municipio de Segovia (PIDEMSG), para conocer los puntos fuertes y débiles del programa y posibles mejoras para el futuro convenio plurianual, así como la formación recibida por los monitores del PAFJ durante el curso escolar. Para ello, se ha utilizado una metodología cualitativa, a través del análisis de las entrevista...

  14. Actividades productivas y manejo de la milpa en tres comunidades campesinas del municipio de Jesús Carranza, Veracruz, México

    OpenAIRE

    Juana Ortiz-Timoteo

    2015-01-01

    En este estudio se analizan las actividades productivas y el estado del conocimiento actual que poseen los campesinos sobre el manejo de la milpa en tres comunidades del municipio de Jesús Carranza, Veracruz. La información se obtuvo mediante la aplicación de un cuestionario y una entrevista semiestructurada de aspectos agrícolas, en una muestra de 30 informantes. Los resultados muestran que en estas comunidades se practican dos tipos de milpa: milpa de tapachol que es un policultivo y se sie...

  15. Situación profesional de los recursos humanos de la actividad física y el deporte en el municipio de Coslada

    OpenAIRE

    Gallardo Pérez, Jana; Campos Izquierdo, Antonio

    2011-01-01

    El objetivo principal del estudio es conocer, la situación profesional de las personas que trabajan en funciones de actividad física y deporte en organizaciones subcontratadas en el municipio de Coslada. En él, se describen la situación socio-demográfica, laboral y formativa así como, las diferentes funciones laborales desarrolladas por las personas objeto de estudio. La metodología utilizada es descriptiva, en la que se realiza entrevista estandarizada por medio de cuestionario a 112 persona...

  16. Evaluación del potencial acoturístico en áreas naturales protegidas del municipio de Santa María Huatulco, México

    OpenAIRE

    Huerta García, Marco Antonio; Sánchez Crispín, Álvaro

    2011-01-01

    En este trabajo se evalúa el potencial ecoturístico de 27 sitios ubicados en áreas naturales protegidas (ANP) del municipio de Santa María Huatulco, al sur de México. En una primera parte se exponen los antecedentes del proyecto denominado «Corredor ecoturístico comunitario Huatulco» (CECH) y de las ANP donde se distribuye geográficamente: Parque Nacional Huatulco y Sistema Comunal de Áreas Protegidas; en un segundo apartado, se presentan 88 indicadores organizados en los ámbitos natural, soc...

  17. Factores determinantes de la perdurabilidad de las empresas mipymes comerciales en el Municipio de Sincelejo – Sucre: apreciaciones de los directivos

    OpenAIRE

    Anaya Vélez, Edgar José

    2014-01-01

    El presente trabajo de investigación tiene por objetivo verificar los factores de perdurabilidad: identidad organizacional; la formalización soporte para las decisiones; eficiencia en procesos; consolidación; diferenciación; gestión integral y los factores que aportan a la eficiencia en las empresas comerciales en el municipio de Sincelejo – Sucre, analizando como estos factores han incidido en su perdurabilidad. El método de investigación que se utiliza es descriptivo - explorativo, con un...

  18. El sistema ejidal, inhibidor del desarrollo rural. Casos de los municipios de Casas y de Güémez, Estado de Tamaulipas, México.

    OpenAIRE

    Trujillo Bautista, Jorge Martín

    2012-01-01

    La presente tesis doctoral aborda el tema rural en el estado de Tamaulipas, México. Estudia los casos de dos municipios: Casas y Güémez. Analiza los factores que son inhibidos por el sistema ejidal para alcanzar el desarrollo de las familias ejidatarias. Tiene como su centro de análisis al Ejido, como fenómeno político agrario y mediante una metodología deductiva, a lo largo de siete capítulos, describe y explica la presencia de agentes internos y externos en la compleja problemática que ...

  19. Huertos urbanos: elementos de regulación y administración de huertos urbanos comunitarios en el municipio de Rubí

    OpenAIRE

    Corridoni, Lucia

    2011-01-01

    El objetivo último del presente trabajo consiste en dar unos criterios de diseño para realizar el proyecto de un espacio de huertos urbanos en el municipio de Rubí, más concretamente en la zona de los valles de Sant Muç, donde las administraciones locales prevén crear un parque territorial equipado (POUM de Rubí de 2009). La propuesta tiene como referencia experiencias concretas y nociones teóricas relativas a la agricultura biológica, aplicadas a la situación concreta de Rubí y a las c...

  20. Prevalencia de parálisis cerebral infantil en los menores de diez años en el municipio de Sabaneta, Antioquia

    Directory of Open Access Journals (Sweden)

    Eliana Mejía

    2001-04-01

    Full Text Available

    La parálisis cerebral infantil (PCI es una enfermedad altamente
    invalidante, con un gran impacto familiar y social. En nuestro país se
    desconoce su frecuencia de presentación y el objetivo de este estudio
    es reportar su prevalencia en el municipio de Sabaneta (Antioquia,
    para conocer así su verdadera magnitud y de esta forma las autoridades sanitarias puedan instaurar programas de prevención y rehabilitación

     

     

  1. Prevalencia de parálisis cerebral infantil en los menores de diez años en el municipio de Sabaneta, Antioquia

    OpenAIRE

    Eliana Mejía; Mónica Guzmán; Juan González; Diana Angel

    2001-01-01

    La parálisis cerebral infantil (PCI) es una enfermedad altamente
    invalidante, con un gran impacto familiar y social. En nuestro país se
    desconoce su frecuencia de presentación y el objetivo de este estudio
    es reportar su prevalencia en el municipio de Sabaneta (Antioquia),
    para conocer así su verdadera magnitud y de esta forma las autoridades sanitarias puedan instaurar programas de prevención y rehabilitación

     

    &...

  2. Influencia de la disponibilidad de nutrientes sobre los cambios espaciotemporales de la comunidad de fitoplancton en el litoral del Municipio de Guasave, Sinaloa.

    OpenAIRE

    Ulloa Pérez, Ana Elsi

    2015-01-01

    Con la finalidad de entender los mecanismos que regulan los cambios en las poblaciones del fitoplancton en el ecosistema costero del norte de Sinaloa, se realizaron 6 campañas de muestreo en 25 estaciones en el litoral del Municipio de Guasave, Sinaloa, durante el período noviembre de 1999 - agosto de 2000. Se tomaron muestras de agua superficiales para la determinación de la abundancia y composición del fitoplancton, así como para el análisis de nutrientes (amonio, nitritos, nitratos, fósfor...

  3. Las Competencias Legales del Racional en la Organización Administrativa y Contable del Municipio de Valencia (Comienzos del Siglo XVII)

    OpenAIRE

    Francisco Mayordomo García-Chicote

    2005-01-01

    La organización administrativa y contable de los mayores municipios españoles, a comienzos del XVII, es un tema que apenas ha sido abordado por los investigadores de la historia de la Contabilidad y del Derecho. En este trabajo se estudian los textos legales (Capitols del Quitament y Ordenanzas de la Taula de Canvis) que regulaban aquellas cuestiones en relación con la ciudad de Valencia, y sobre todo se hace un detenido análisis del cargo municipal (el Racional) que se responsabilizaba de la...

  4. Caracterizacion fisiológica del crecimiento y desarrollo del fruto de mango (mangifera indica l.) variedad van dyke en el municipio de el espinal

    OpenAIRE

    2011-01-01

    El estudio se realizó en la finca Frutol del Municipio de El Espinal, departamento del Tolima, situado a una altura de 431 m.s.n.m., con precipitación, temperatura y Humedad Relativa promedio anual de 1.368 mm / año, 29°C y 70%.   Se realizó el seguimiento de los cambios ocurridos durante el crecimiento y desarrollo del mango Variedad Van Dyke, desde la antesis hasta la madurez fisiológica: Diámetros longitudinal, transversal, el volumen, la gravedad específica, el peso fresco y seco, color ...

  5. Finanzas y gestión pública local en Colombia: el caso de la Hacienda en el municipio de Medellín

    OpenAIRE

    Alexander Tobón; Mauricio López; Jenifer González

    2012-01-01

    La consolidación de la descentralización fiscal en Colombia ha permitido avances significativos en la gestión financiera de los municipios, evidentes en indicadores que permiten hacer seguimiento y evaluación permanente de la administración. Este artículo presenta un análisis de las finanzas públicas de Medellín realizado a través de algunos indicadores fiscales agregados y de la estimación de dos modelos econométricos de sensibilidad para los gastos de inversión y los ingresos tributarios. S...

  6. Estación depuradora de aguas residuales (E.D.A.R.) en el municipio de Carcelén (Albacete).

    OpenAIRE

    LÓPEZ GÓMEZ, GUILLERMO

    2016-01-01

    [ES] Desde hace algunos años se han evidenciado vertidos de aguas residuales urbanas en la población de Carcelén (Albacete) que superan los valores límites máximos autorizados por el Organismo de Cuenca, debido a un aumento de la carga orgánica de diseño de la depuradora actual. El objeto del presente Proyecto Final de Grado es el diseño de una nueva Estación Depuradora de Aguas Residuales adecuada a las características actuales de los vertidos generados en este municipio. Para la selecc...

  7. PARTICIPACIÓN COMUNITARIA EN EL GOLFO DE URABÁ: EL CASO DEL CORREGIMIENTO BOCAS DEL ATRATO Y LA VEREDA EL ROTO, MUNICIPIO DE TURBO, ANTIOQUIA

    OpenAIRE

    TABORDA MARÍN ALEXANDER; MALDONADO LIZARAZO CAROLINA; PALACIO BAENA JAIME; VÁSQUEZ ARANGO JAIRO GUILLERMO

    2010-01-01

    El texto expone, desde el estudio de los aspectos socioculturales y el abordaje particular de la participación comunitaria, los resultados de un proyecto experimental de acuicultura de róbalo (Centropomus undecimalis) y sábalo (Megalops atlanticus) en el Corregimiento de Bocas del Atrato y la vereda El Roto, del Municipio de Turbo, Antioquia. Trabajo interdisciplinario que busca generar herramientas de conocimiento científico para contribuir en la mitigación de la disminución del recurso ícti...

  8. Vulnerabilidad social, institucionalidad y percepciones sobre el cambio climático: un acercamiento al municipio de San Felipe, Costa de Yucatán

    OpenAIRE

    Denise Soares; Isabel Gutiérrez

    2011-01-01

    Se contribuye al avance de la discusión sobre vulnerabilidad social frente al cambio climático y a la par se presenta un estudio de caso sobre percepciones acerca de la vulnerabilidad social en el municipio de San Felipe, en la costa de Yucatán, Méx., a fin de conocer, de modo contextualizado y empírico, las distintas expresiones de vulnerabilidad social que padecen los también distintos actores sociales locales. Los resultados encontrados revelan que la idea ...

  9. La enseñanza de la educación física y el deporte en las colonias de vacaciones del municipio de Avellaneda

    OpenAIRE

    Ganz, Nancy; Bamonte, Luis; Benito, Francisco J.; Ronconi, Piero

    2013-01-01

    La presentación que a continuación se detalla, es una investigación que se propuso indagar aspectos relacionados con la enseñanza de la Educación Física y los deportes en las colonias de verano del Municipio de Avellaneda, las cuales, implementadas desde el gobierno local con fines inclusivos, reciben a sectores sociales en condiciones de vulnerabilidad. La relevancia de este trabajo se relaciona con dos ejes bien detallados, uno, con los aspectos vinculados a la educación no formal de la ...

  10. Valores y desarrollo educativo : estudio de caso del municipio de Consuelo, San Pedro de Macorís, Republica Dominicana (1959-2012)

    OpenAIRE

    Elmúdesi Espaillat, Leonor Rosario

    2015-01-01

    Educar en valores constituye un imperativo moral de todo proyecto educativo ya que favorece la creación del marco ético donde el educando encarna su construcción como persona y como ciudadano. Dada la importancia de nuevas comprensiones en torno a la educación como proyecto social, este trabajo se ha enfocado en la línea de investigación de la educación en valores, haciendo especial énfasis en los vinculados a la formación ciudadana. El contexto del estudio fue el Municipio de Consuelo, Pr...

  11. Formulación participativa del presupuesto en el municipio Caroní: comparación con la experiencia de Porto Alegre

    OpenAIRE

    María Pilar GARCÍA-GUADILLA; Rosa Amelia GONZÁLEZ

    2009-01-01

    RESUMEN: El presente artículo evalúa la experiencia de descentralización local que se lleva a cabo desde 1990 hasta la fecha en el Municipio Caroní de Ciudad Guayana, Venezuela. Focalizándose en la elaboración del presupuesto participativo, se identifican los alcances y limitaciones de algunas prácticas de democracia participativa tales como la participación ciudadana en la gestión local. Finalmente, se hace una comparación con la experiencia de elaboración del presupuesto en forma participat...

  12. Caracterización del consumo de digoxina en la insuficiencia cardíaca en el municipio de Rodas (Cienfuegos, Cuba)

    OpenAIRE

    Milián Vázquez, Pedro Miguel; Cepero Pérez, Ivette; Espinosa Brito, Alfredo; Padrón Velásquez, Luis; Hernández Fernández, Juana; Linares Borges, Arlette; Reyes Hernández, Dunia; Vázquez Montero, Lidia; Quirós Enríquez, Maira; Mass Sosa, Luis Alberto

    2004-01-01

    Se presenta un estudio descriptivo de corte transversal en pacientes mayores de 15 años con insuficiencia cardíaca que fueron tratados con digoxina en 15 consultorios médicos del municipio de Rodas, Cienfuegos, Cuba, en el primer semestre del 2003. Se estudiaron 130 pacientes registrados en la Farmacia Municipal. Se realizó una revisión de las historias clínicas individuales, hojas de egresos hospitalarios y entrevistas a los pacientes. La mayor parte de los pacientes que consumían digoxin...

  13. Aplicación del concepto geomarkefing al caso de la microindustria del vestido en el Municipio de Nezahualcóyotl, Estado de México

    OpenAIRE

    Carlos Téllez Valencia; Adrián Guillermo Aguilar

    2000-01-01

    El objetivo central de este trabajo es el de proponer un marco metodoiógico que identifique opciones de desarroilo económico y social para ¡as microempresas. Para tal fin. se apiica el concepto de geomarketing a un estudio de caso sobre las microindustrias del vestido en el municipio de Nerahuaicóyotl. La utilidad del concepto radica en determinar un diagnóstico tanto de los productores (oferta) como de¡ perfil de los consumidores (demanda), para evaluar cabalmente un estudio de m...

  14. Utilización del Boophilus microplus como remedio isopático en el control del ectoparásito en el Municipio de Aguazul (Casanare)

    OpenAIRE

    Francisco Javier Niño Murcia; Edwin Gustavo Morales Arguello

    2005-01-01

    En este estudio se demostró la efectividad de un remedio isopático vía oral, para el control de la garrapata Boophilus microplus, inocuo para los animales, medio ambiente y el hombre, evitando residuos de plaguicidas en el producto final. La investigación se realizó en una finca ubicada en el municipio de Aguazul (Casanare); localizada a los 05°10’23’’ de latitud norte y 72°33’17’’ de longitud oeste desde Greenwich, altitud: 300 msnm, temperatura media: 27ÚC. Precipitación anual media: 2.441 ...

  15. Modelo de gobierno electrónico para la alcaldía rural del municipio autónomo Colón

    Directory of Open Access Journals (Sweden)

    Albanio Alcántara Acosta

    2010-09-01

    Full Text Available En la actualidad el avance de las nuevas tecnologías y el progresivo acceso de los ciudadanos a la red de Internet esta abriendo camino a nuevas posibilidades en el campo del gobierno, descubriendo a Internet como una instrumento de evolución en la forma de relación entre las administraciones públicas y los ciudadanos.El propósito del presente estudio fue proponer un modelo de gobierno electrónico para la Alcaldía rural del municipio autónomo Colón. La investigación fue de tipo descriptiva y de campo.La población y muestra se dividió en dos tipos, la población A 101.219 habitantes del municipio Colón quedando su muestra en 204 sujetos y la población B de 13 Coordinadores y jefes de unidades de la Alcaldía tomándolos como censo poblacional. Utilizando instrumentos con preguntas cerradas para la población A y tipo likert para la población B. Se aplicaron estadísticas descriptivas con frecuencias absolutas y porcentuales para la población A, permitiendo concluir que la brecha digital en el municipio es del 67%, viéndose afectada mayormente por el nivel académico de la población, de igual manera se realizó un análisis de varianza para la población B obteniendo como resultado que la alcaldía necesita la contratación de personal especializado en el área de tecnología, así como también la creación de un portal Web que contenga los servicios ofrecidos por la alcaldía. Se recomienda establecer el Modelo de Gobierno Electrónico para la Alcaldía Rural del Municipio Autónomo Colón del Estado Zulia propuesto planteado en esta investigación.Palabras Claves: Gobierno electrónico, brecha digital, TIC, gobernabilidad

  16. Impacto de la religión en el espíritu capitalista de los municipios del Alto Magdalena Medio

    OpenAIRE

    Cañas Duque, Abelardo

    2006-01-01

    La Investigación “Impacto de la Religión en el Espíritu Capitalista de los Municipios del Alto Magdalena Magdalena Medio”, tiene una orientación eminentemente weberiana; se realizó con base en estudios realizados por: Edward Thompson en la formación histórica de la clase obrera en Inglaterra; Jean Pierre Bastian en Costa Rica y Mauricio Beltrán Cely en Bogotá. En éste, se dan a conocer aspectos generales sobre la vida de los protestantes en la región, haciendo énfasis en el comportamie...

  17. Comportamiento de la hipertensión arterial en niños y adolescentes en el municipio Amancio, septiembre de 2011 a mayo de 2012

    OpenAIRE

    Mileidis Brizuela Cabrera; Raiza Garcez Ruiz; Misleidis Puga Ramírez; Disney Varona García; Bertha Margarita Pérez Morilla

    2015-01-01

    Se realizó un estudio descriptivo de todos los pacientes diagnosticados como hipertensos en el área de salud de Amancio, perteneciente al policlínico docente “Luis Aldana Palomino”, con la finalidad de determinar el comportamiento de la Hipertensión Arterial (HTA) en niños y adolescentes. El universo lo constituyeron los niños y adolescentes del municipio (7627) y la muestra fue de 42 niños y adolescentes con HTA confirmada, a quienes se les aplicó un cuestionario, como instrumento para la re...

  18. Fast sequential Monte Carlo methods for counting and optimization

    CERN Document Server

    Rubinstein, Reuven Y; Vaisman, Radislav

    2013-01-01

    A comprehensive account of the theory and application of Monte Carlo methods Based on years of research in efficient Monte Carlo methods for estimation of rare-event probabilities, counting problems, and combinatorial optimization, Fast Sequential Monte Carlo Methods for Counting and Optimization is a complete illustration of fast sequential Monte Carlo techniques. The book provides an accessible overview of current work in the field of Monte Carlo methods, specifically sequential Monte Carlo techniques, for solving abstract counting and optimization problems. Written by authorities in the

  19. Monte Carlo methods in AB initio quantum chemistry quantum Monte Carlo for molecules

    CERN Document Server

    Lester, William A; Reynolds, PJ

    1994-01-01

    This book presents the basic theory and application of the Monte Carlo method to the electronic structure of atoms and molecules. It assumes no previous knowledge of the subject, only a knowledge of molecular quantum mechanics at the first-year graduate level. A working knowledge of traditional ab initio quantum chemistry is helpful, but not essential.Some distinguishing features of this book are: Clear exposition of the basic theory at a level to facilitate independent study. Discussion of the various versions of the theory: diffusion Monte Carlo, Green's function Monte Carlo, and release n

  20. Use of Monte Carlo Methods in brachytherapy; Uso del metodo de Monte Carlo en braquiterapia

    Energy Technology Data Exchange (ETDEWEB)

    Granero Cabanero, D.

    2015-07-01

    The Monte Carlo method has become a fundamental tool for brachytherapy dosimetry mainly because no difficulties associated with experimental dosimetry. In brachytherapy the main handicap of experimental dosimetry is the high dose gradient near the present sources making small uncertainties in the positioning of the detectors lead to large uncertainties in the dose. This presentation will review mainly the procedure for calculating dose distributions around a fountain using the Monte Carlo method showing the difficulties inherent in these calculations. In addition we will briefly review other applications of the method of Monte Carlo in brachytherapy dosimetry, as its use in advanced calculation algorithms, calculating barriers or obtaining dose applicators around. (Author)

  1. On the use of stochastic approximation Monte Carlo for Monte Carlo integration

    KAUST Repository

    Liang, Faming

    2009-03-01

    The stochastic approximation Monte Carlo (SAMC) algorithm has recently been proposed as a dynamic optimization algorithm in the literature. In this paper, we show in theory that the samples generated by SAMC can be used for Monte Carlo integration via a dynamically weighted estimator by calling some results from the literature of nonhomogeneous Markov chains. Our numerical results indicate that SAMC can yield significant savings over conventional Monte Carlo algorithms, such as the Metropolis-Hastings algorithm, for the problems for which the energy landscape is rugged. © 2008 Elsevier B.V. All rights reserved.

  2. Evaluación del proyecto solución integral de residuos sólidos Cancún, en el Municipio de Benito Juárez, Quintana Roo, México

    OpenAIRE

    Ramírez Martínez, Oscar Fernando

    2016-01-01

    El manejo de los residuos en el municipio de Benito Juárez ha enfrentado durante diferentes periodos deficiencias que han repercutido en la salud pública de los pobladores, en la imagen urbana y en los recursos naturales. Como respuesta la administración del municipio de Benito Juárez 2011-2013, propuso como política pública la descentralización del manejo de residuos sólidos urbanos, donde se incluyeron estrategias para fomentar la prevención, valorización y tratamiento, además de las etapas...

  3. Caracteres morfológicos de vainilla (Vanilla planifolia J.) utilizados por el agricultor en la selección de material reproductivo en cuatro municipios del Totonacapan, México.

    OpenAIRE

    Baltazar Nieto, Pablo

    2010-01-01

    El objetivo de este estudio fue conocer los caracteres morfológicos de la planta de vainilla (Vanilla planifolia J.) de hoja, tallo, fruto y esqueje que el productor usa en la selección de su material de reproducción y comprender su importancia en la conservación de la especie en cuatro municipios de la región del Totonacapan, México. Los municipios en los que se hizo el estudio fueron: Venustiano Carranza y Caxhuacan del estado de Puebla y de Papantla de Olarte y Gutiérrez Zamora del estado ...

  4. La dimensión social del desarrollo urbano sostenible: construcción de indicadores de percepción ciudadana. Caso: observatorios para el desarrollo sostenible del municipio de Manizales.

    OpenAIRE

    Ríos Martínez, Gloria Beatriz

    2003-01-01

    Para que los procesos de participación comunitaria se articulen al desarrollo local, es indispensable abordar la percepción ciudadana y conocer los grados de satisfacción y pertenencia que tienen los ciudadanos con respecto a la calidad de la vida del municipio. Igualmente, identificar el significado que tiene para los distintos actores municipales las dimensiones social, económica y ambiental del Desarrollo Sostenible. En el Municipio de Manizales – Colombia, se ha desarrollado un modelo de ...

  5. Scalable Domain Decomposed Monte Carlo Particle Transport

    Energy Technology Data Exchange (ETDEWEB)

    O' Brien, Matthew Joseph [Univ. of California, Davis, CA (United States)

    2013-12-05

    In this dissertation, we present the parallel algorithms necessary to run domain decomposed Monte Carlo particle transport on large numbers of processors (millions of processors). Previous algorithms were not scalable, and the parallel overhead became more computationally costly than the numerical simulation.

  6. Accelerating Hasenbusch's acceleration of hybrid Monte Carlo

    International Nuclear Information System (INIS)

    Hasenbusch has proposed splitting the pseudo-fermionic action into two parts, in order to speed-up Hybrid Monte Carlo simulations of QCD. We have tested a different splitting, also using clover-improved Wilson fermions. An additional speed-up between 5 and 20% over the original proposal was achieved in production runs. (orig.)

  7. A comparison of Monte Carlo generators

    CERN Document Server

    Golan, Tomasz

    2014-01-01

    A comparison of GENIE, NEUT, NUANCE, and NuWro Monte Carlo neutrino event generators is presented using a set of four observables: protons multiplicity, total visible energy, most energetic proton momentum, and $\\pi^+$ two-dimensional energy vs cosine distribution.

  8. Advances in Monte Carlo computer simulation

    Science.gov (United States)

    Swendsen, Robert H.

    2011-03-01

    Since the invention of the Metropolis method in 1953, Monte Carlo methods have been shown to provide an efficient, practical approach to the calculation of physical properties in a wide variety of systems. In this talk, I will discuss some of the advances in the MC simulation of thermodynamics systems, with an emphasis on optimization to obtain a maximum of useful information.

  9. Monte Carlo methods beyond detailed balance

    NARCIS (Netherlands)

    Schram, Raoul D.; Barkema, Gerard T.

    2015-01-01

    Monte Carlo algorithms are nearly always based on the concept of detailed balance and ergodicity. In this paper we focus on algorithms that do not satisfy detailed balance. We introduce a general method for designing non-detailed balance algorithms, starting from a conventional algorithm satisfying

  10. Using CIPSI nodes in diffusion Monte Carlo

    CERN Document Server

    Caffarel, Michel; Giner, Emmanuel; Scemama, Anthony

    2016-01-01

    Several aspects of the recently proposed DMC-CIPSI approach consisting in using selected Configuration Interaction (SCI) approaches such as CIPSI (Configuration Interaction using a Perturbative Selection done Iteratively) to build accurate nodes for diffusion Monte Carlo (DMC) calculations are presented and discussed. The main ideas are illustrated with a number of calculations for diatomics molecules and for the benchmark G1 set.

  11. A note on simultaneous Monte Carlo tests

    DEFF Research Database (Denmark)

    Hahn, Ute

    In this short note, Monte Carlo tests of goodness of fit for data of the form X(t), t ∈ I are considered, that reject the null hypothesis if X(t) leaves an acceptance region bounded by an upper and lower curve for some t in I. A construction of the acceptance region is proposed that complies to a...

  12. Monte Carlo Renormalization Group: a review

    International Nuclear Information System (INIS)

    The logic and the methods of Monte Carlo Renormalization Group (MCRG) are reviewed. A status report of results for 4-dimensional lattice gauge theories derived using MCRG is presented. Existing methods for calculating the improved action are reviewed and evaluated. The Gupta-Cordery improved MCRG method is described and compared with the standard one. 71 refs., 8 figs

  13. Juan Carlos D'Olivo: A portrait

    Science.gov (United States)

    Aguilar-Arévalo, Alexis A.

    2013-06-01

    This report attempts to give a brief bibliographical sketch of the academic life of Juan Carlos D'Olivo, researcher and teacher at the Instituto de Ciencias Nucleares of UNAM, devoted to advancing the fields of High Energy Physics and Astroparticle Physics in Mexico and Latin America.

  14. Kuidas kirjutatakse ajalugu? / Carlo Ginzburg ; interv. Marek Tamm

    Index Scriptorium Estoniae

    Ginzburg, Carlo

    2007-01-01

    Ülevaade Pisa Euroopa kultuuride professori C. Ginzburg'i teostest. Varem. ilm.: Märgid, jäljed ja tõendid : intervjuu Carlo Ginzburgiga // Ginzburg, Carlo. Juust ja vaglad. - Tallinn, 2000. - Lk. 262-271

  15. Uso actual y potencial de la flora de la ciénaga de Zapatosa, en el municipio de Chimichagua, Cesar - Colombia

    Directory of Open Access Journals (Sweden)

    Jiménez Escobar Néstor David

    2007-12-01

    Full Text Available Se realizó el primer acercamiento al conocimiento de los usos y nombres populares de las plantas útiles de
    la ciénaga de Zapatosa, en el municipio de Chimichagua (Cesar - Colombia. Se visitaron cuatro veredas, el casco urbano y tres islas ubicadas en la Ciénaga dentro del municipio. Se reportaron 252 especies de plantas vasculares, asociadas a 280 nombres populares, que fueron agrupadas en once categorías de uso, estableciéndose 370 registros, siendo Medicinales la categoría que presentó un mayor número de especies,
    seguida de Comestibles, Ornamentales, Construcción y Artesanales. Además, se determinó el origen de las
    especies registradas en alguna de las categorías de uso, siendo en total 142 de origen nativo. Se resalta la
    importancia de las especies nativas, principalmente de las ubicadas dentro de la categoría de Artesanales y Construcción, por su importancia cultural y ambiental, pues son fundamentales para la generación de planes de manejo y conservación. Entre ellas se destacan la palma estera (Astrocaryum malybo y el Banco (Gyrocarpus americana, por el grado de amenaza en la que se encuentran y por su estrecha relación con el patrimonio cultural de la región.

  16. Culícidos transmisores del virus del Nilo Occidental en el municipio de Jesús Menéndez

    Directory of Open Access Journals (Sweden)

    Marco A. Cruz Cruz

    2015-02-01

    Full Text Available Se realizó un estudio descriptivo de la población de culícidos en el municipio de Jesús Menéndez, Las Tunas, durante el año 2012; con el objetivo de determinar la presencia de nuevas especies de mosquitos que pueden intervenir en la transmisión del virus del Nilo Occidental. El universo lo constituyeron los doce consejos populares del municipio. La captura de larvas y de adultos se realizó de acuerdo a las técnicas normadas en Cuba y según la metodología de la Organización Mundial de la Salud. Se identificaron cinco nuevas especies que son capaces de transmitir el virus: Aedes albopictus (2,1 %, Culex erraticus (0,25 %, Mansonia titillans (0,04 %, Orthopodomia signifera (0,01 % y Uranotaenia lowii (0,05 %. Los consejos populares con más distribución fueron los urbanos: El Batey (48,02 %, Pueblo Viejo (26,7 % y El Canal (16,4 %, donde existe mayor acumulación de agua por parte de la población en diferentes depósitos y criaderos naturales dentro de la zona urbana

  17. Finanzas y gestión pública local en Colombia: el caso de la Hacienda en el municipio de Medellín

    Directory of Open Access Journals (Sweden)

    Alexander Tobón

    2012-01-01

    Full Text Available La consolidación de la descentralización fiscal en Colombia ha permitido avances significativos en la gestión financiera de los municipios, evidentes en indicadores que permiten hacer seguimiento y evaluación permanente de la administración. Este artículo presenta un análisis de las finanzas públicas de Medellín realizado a través de algunos indicadores fiscales agregados y de la estimación de dos modelos econométricos de sensibilidad para los gastos de inversión y los ingresos tributarios. Se concluye que pese a que el municipio presenta un estado fiscal saludable, con un gasto de inversión creciente, hay evidencia de la presencia de los fenómenos de pereza fiscal y de relajación en el período 1998-2009, justificados por la dependencia cada vez mayor en los ingresos no tributarios.

  18. Inventario de atractivos para el desarrollo turístico local del municipio Martí. Inventory of attractions for local tourist development of the Marti municipality.

    Directory of Open Access Journals (Sweden)

    Mabel Font Aranda

    2013-05-01

    Full Text Available El deterioro del sector agropecuario en el municipio Martí, exige la necesidad de ejecución de un grupo de proyectos de desarrollo local, que permitan revertir los procesos en el ámbito social, económico y ambiental a partir de los recursos naturales y socioculturales propios. Sobre la base anterior, se realizó el inventario de recursos/atractivos del municipio Martí como parte del diseño de productos turísticos a ofrecer  en la búsqueda de alternativas para el desarrollo local. Se registró y valoró el estado de todos los elementos que por sus cualidades naturales y/o culturales, pueden constituir una motivación para el turista, se  realizó a partir del trabajo de campo, llenado de fichas, el análisis espacio-territorial mediante el uso de métodos cartográficos, la jerarquización  y evaluación de atractivos turísticos focales, complementarios y de apoyo, fue esencial el trabajo grupal, los diferentes talleres de participación con los especialistas. Finalmente quedaron conformadas las fichas técnicas de inventario de los recursos turísticos seleccionados.

  19. La planificación y gestión del suministro de agua potable en los municipios urbano-turísticos de Alicante

    Directory of Open Access Journals (Sweden)

    Álvaro Francisco Morote Seguido

    2015-01-01

    Full Text Available En los municipios urbano-turísticos el suministro de agua potable se convierte en uno de losservicios más importantes para el desarrollo de la actividad turística, tanto para la oferta residencial,hotelera y de ocio. El objetivo de esta investigación es conocer y analizar como las empresasgestionan y planifican el suministro de agua potable en los municipios litorales de Alicante yponer de manifiesto la implicación de estas empresas en la vertebración del territorio y la puestaen valor de un recurso tan escaso en esta provincia como es el agua. Metodológicamente se hanrealizado diferentes entrevistas a los responsables y técnicos de estas empresas para conocer deprimera mano la gestión del suministro de agua. Algunas de las conclusiones extraídas han sidola mejora en la eficiencia del suministro de agua y por tanto, un ahorro de este recurso y las buenasprácticas de gestión. También cabe indicar la labor estratégica que ejercen estas empresas conel abastecimiento a la población, especialmente en urbanizaciones que se construyeron antes dela iniciación del servicio, resolviendo problemas, tanto en cantidad como en calidad del agua.

  20. Turismo sostenible: una alternativa de desarrollo a escala humana en los municipios de Nuquí y Bahía Solano

    Directory of Open Access Journals (Sweden)

    Emigdio Pertuz

    2003-11-01

    Full Text Available En el departamento del Chocó, las comunidades locales han venido trabajando en la construcción colectiva de un modelo que les permita vivir mejor. Escogieron el ecoturismo como herramienta de conservación y uso sostenible del medio ambiente y han iniciado concertadamente la construcción de una política ecoturística nacional. La historia del desarrollo turístico en el Chocó comienza hace aproximadamente treinta años, con un producto que se perfilaba como de sol y playa, con actividades aisladas y sin ninguna planificación, atentando contra los valores naturales y culturales de la zona. Una vez declarada la ensenada de Utría como Parque Nacional Natural y aprovechando la capacitación recibida por un grupo de guías en temas ambientales, el destino se vuelca hacia el ecoturismo, y en torno a él se conforma una alianza que posteriormente da origen a la Asociación de Hoteleros Ecoturísticos de los Municipios de Nuquí y Bahía Solano. Esta entidad, las alcaldías de los dos municipios, la administración del Parque, la Fundación Natura y los Consejos Comunitarios han encaminado sus esfuerzos para el posicionamiento del turismo como motor de la economía regional.

  1. Cobertura efectiva del manejo de la violencia contra mujeres en municipios Mexicanos: límites de la métrica

    Directory of Open Access Journals (Sweden)

    Diana P. Viviescas-Vargas

    2013-08-01

    Full Text Available El estudio estimó la cobertura efectiva de los servicios en salud de primer nivel de atención para el manejo de la violencia doméstica contra la mujer en tres municipios mexicanos. Se estimó la prevalencia y severidad de la violencia usando una escala validada, y la cobertura efectiva con la propuesta de Shengelia y colaboradores, con modificaciones. Se consideró atención con calidad cuando hubo sugerencia de hacer la denuncia a las autoridades. La utilización y calidad de la atención fue baja en los tres municipios analizados, siendo más frecuente la utilización cuando hubo violencia sexual o física. La cobertura efectiva en Guachochi, Jojutla y Tizimín fue de 29.41%, 16.67% y cero, respectivamente. El indicador de cobertura efectiva tiene dificultades para medir eventos y respuestas no se fundamentan en modelos biomédicos. Los hallazgos sugieren que el indicador puede ser mejorado al incorporar otras dimensiones de la calidad.

  2. Gobierno electrónico de la alcaldía del municipio Carirubana del estado Falcón - Venezuela

    Directory of Open Access Journals (Sweden)

    Felix Scarby

    2010-09-01

    Full Text Available El propósito de esta investigación fue determinar los factores organizacionales, tecnológicos y legales que inciden en el desarrollo del Gobierno Electrónico en la alcaldía del Municipio Carirubana, así como determinar la brecha digital existente en los ciudadanos que habitan en él proponiendo lineamientos estratégicos para desarrollar el Gobierno electrónico. La investigación es de tipo descriptivo de campo. La metodología utilizada fue dividida en fases y actividades que generaban entradas y salidas que fueron utilizadas en las actividades posteriores, concluyendo que la brecha digital existente en el uso de Internet en los ciudadanos es de 82%, y esta determinada básicamente por el nivel económico de las personas, el acceso a la tecnología y del conocimiento en el manejo de Internet, también influye el nivel educativo que presentan los ciudadanos del municipio Carirubana. Por otra parte los servicios de mayor demanda por parte del público son el pago de ejidos, trimestres y la solicitud de documentos oficiales.Palabras Clave:Gobernabilidad, Tecnologías de Información, Internet.

  3. Single Neurons in the Insular Cortex of a Macaque Monkey Respond to Skin Brushing: Preliminary Data of the Possible Representation of Pleasant Touch.

    Science.gov (United States)

    Grandi, Laura Clara; Gerbella, Marzio

    2016-01-01

    Pleasant touch may serve as a foundation for affiliative behavior, providing a mechanism for the formation and maintenance of social bonds among conspecifics. In humans, this touch is usually referred to as the caress. Dynamic caressing performed on the hairy skin with a velocity of 1-10 cm/s is perceived as being pleasant and determines positive cardio-physiological effects. Furthermore, imaging human studies show that affiliative touch activates the posterior insular cortex (pIC). Recently, it was demonstrated that pleasant touch in monkeys (i.e., sweeping in a grooming-like manner) is performed with velocities similar to those characteristics of human caress (9.31 cm/s), and causes similarly positive autonomic effects, if performed with velocity of 5 cm/s and 10 cm/s, but not lower or higher. Due to similarities between the human caress and non-human primate sweeping, we investigated for the first time whether single neurons of the perisylvian regions (secondary somatosensory cortex [SII] and pIC) of a rhesus monkey can process sweeping touch differently depending on the stimulus speed. We applied stimulation with two speeds: one that optimally induces positive cardio-physiological effects in the monkey who receives it, and includes the real speed of sweep (5-15 cm/s, sweep fast), and a non-optimal speed (1-5 cm/s, sweep slow). The results show that single neurons of insular cortex differently encode the stimulus speed. In particular, even the majority of recorded somatosensory neurons (82.96%) did not discriminate the two speeds, a small set of neurons (16.59%) were modulated just during the sweep fast. These findings represent the first evidence that single neurons of the non-human primates insular cortex can code affiliative touch, highlighting the similarity between human and non-human primates' social touch systems. This study constitutes an important starting point to carry out deeper investigation on neuronal processing of pleasant sweeping in the central

  4. CARACTERIZACIÓN ESTRUCTURAL DE LA MATERIA ORGÁNICA DE TRES SUELOS PROVENIENTES DEL MUNICIPIO DE AQUITANIA BOYACÁ, COLOMBIA

    Directory of Open Access Journals (Sweden)

    Carmen S. Mosquera

    2010-09-01

    Full Text Available La materia orgánica del suelo puede variar considerablemente en su estructura, composición y conformación, de acuerdo con el origen y la edad de los materiales que la constituyen. En la presente investigación se procedió a caracterizar, mediante el empleo de la espectroscopia infrarroja y la resonancia magnética nuclear en estado sólido, dos suelos inceptisoles (I01 y I02 y un histosol (H03 destinados al cultivo de cebolla larga, en el municipio de Aquitania-Boyacá, Colombia, a dos profundidades: 0 - 10 y 40 - 50 cm. Según los espectros infrarrojos, se detectó la presencia de grupos OH (debida posiblemente a fenoles, ácidos carboxílicos o alcoholes, grupos aromáticos y alifáticos. Los espectros de 13C-RMN en estado sólido con CPMAS evidenciaron el siguiente orden respecto a la cantidad de carbonos que conforman la materia orgánica del suelo: H03-0 = 100 y H03 -40 = 88, I02-0 = 23 y I02-40 = 0, y finalmente I01-0 = 17 y I01-40 = 12, confirmándose la disminución de carbonos en la materia orgánica a través del perfil del suelo, y además se estableció que el carbón resonante en la región delta = 108-50 ppm de los espectros (N – y O-alquilos y acetales dominó en toda la MOS obtenida; le siguió el carbón aromático (delta = 168-108 ppm para los suelos I01-0 y H03-40, y el carbón alifático (delta = 0-50 ppm para los suelos I01-40, I02-0 y H03-0. Finalmente, el carbónC=O( delta= 220-162 ppm fue el menos dominante en la materia orgánica del suelo en todos los tres suelos caracterizados.

  5. Propuesta de Estrategias para la Gestión Integral de la Basura. Municipio Sucre, Estado Miranda

    Directory of Open Access Journals (Sweden)

    Pedro Ramírez

    2015-01-01

    Full Text Available La gestión de residuos y desechos sólidos es una tarea compleja que se ha convertido en un problema común en los países en vías de desarrollo, debido a múltiples factores, como el crecimiento demográfico, la crisis económica que ha obligado a reducir el gasto público y mantener las tarifas bajas en el servicio de aseo urbano, la debilidad institucional y la poca educación sanitaria y participación ciudadana (Jaramillo, 2000. El objetivo del trabajo fue proponer estrategias para optimizar la gestión integral de la basura en el municipio Sucre del estado Miranda. Se evaluaron aspectos físico-espaciales, distribución de la población, uso de la tierra y gestión integral actual de la basura conformada por pendientes, vialidad, distribución de la población, generación, recolección y disposición final de la basura. Los resultados sugieren que debido a las características físico espaciales del área de estudio, así como la forma como se realiza la gestión de la basura, en donde existe problemas de competencia entre el ejecutivo nacional y municipal, es importante implementar estrategias como la generadas en esta investigación dirigidas hacia el aprovechamiento y tratamiento de los residuos y desechos sólidos, la educación de la población en materia ambiental, localización de nuevas áreas como estaciones de trasferencia o rellenos sanitarios para minimizar los impactos a la salud por la acumulación de los desechos y residuos. Cabe destacar, un importante aporte a la geografía por parte de la investigación como es la regionalización o discriminización por zonas para el abordaje de la problemática.

  6. Los Pteridófitos de un bosque subandino en el municipio de Albán, Cundinamarca (Colombia

    Directory of Open Access Journals (Sweden)

    Triana Moreno Luz Amparo

    2004-12-01

    Full Text Available Se presenta el tratamiento taxonómico de los helechos y plantas afines de un bosque subandino localizado en el municipio de Albán, al occidente de Cundinamarca, entre 1.900 y 2.100 m de altitud. El área de estudio comprende una su erficie de 70 ha, de las cuales 22 corres-ponden a un relicto de bosque subandino. Allí se registran 107 especies distribuidas en
    45 géneros (38% de los géneros colombianos y 21 familias (60% de las familias del país,   resultados importantes teniendo en cuenta que el área muestreada es relativamente pequeña.  Para cada categoría taxonómica se presentan claves, descripciones y anotaciones de composición y distribución. También se presenta una guía ilustrada de las especies más frecuentes, que incluye descripciones cortas en un lenguaje sencillo para facilitar la comprensión por parte de cualquier lector; estas se acompañan de fotografías e íconos que permiten una mejor y rápida identificación. Las familias con mayor número de géneros son Polypodiaceae con siete,
    Dryopteridaceae con seis, Pteridaceae con cuatro y Cyatheaceae y Dennstaedtiaceae con tres cada una. Los géneros más diversos son Asplenium con ocho especies, Polypodium, Pteris y Elaphoglossum con siete, Blechnum, Thelypteris y Diplazium con seis, y Dennstaedtia, Hymenophyllum, Trichomanes,
    Selaginella y Huperzia con tres. De las especies encontradas Blechnum divergens, Blechnum lherminieri, Diplazium ambiguum, Elaphoglossum piloselloides, Huperzia amentacea, Hypolepis repens, Polybotrya caudata, Pteris altissima, Thelypteris grandis y Trichomanes reptans son nuevos registros para Cundinamarca. La mayoría de las especies (46% son exclusivamente terrestres y dentro de éstas las más abundantes son Asplenium flabellulatum en el bosque, Equisetum bogotense, Thelypteris rudis y Pityrogramma ebenea en el borde de las quebradas y Thelypteris rudis y Pteridium arachnoideum en los pastizales. En cuanto a las epífitas (20

  7. Surface-water, water-quality, and ground-water assessment of the Municipio of Comerio, Puerto Rico, 1997-99

    Science.gov (United States)

    Rodríguez-Martínez, Jesús; Gómez-Gómez, Fernando; Santiago-Rivera, Luis; Oliveras-Feliciano, M. L.

    2001-01-01

    To meet the increasing need for a safe and adequate supply of water in the municipio of Comerio, an integrated surface-water, water-quality, and ground-water assessment of the area was conducted. The major results of this study and other important hydrologic and water-quality features were compiled in a Geographic Information System, and are presented in two 1:30,000-scale map plates to facilitate interpretation and use of the diverse water-resource data. Because the supply of safe drinking water was a critical issue during recent dry periods, the surface-water assessment portion of this study focused on analysis of low-flow characteristics in local streams and rivers. Low-flow characteristics were evaluated at one continuous-record gaging station based on graphical curve-fitting techniques and log-Pearson Type III frequency curves. Estimates of low-flow characteristics for 13 partial-record stations were generated using graphical-correlation techniques. Flow-duration characteristics for the continuous- and partial-record stations were estimated using the relation curves developed for the low-flow study. Stream low-flow statistics document the general hydrology under current land- and water-use conditions. A sanitary quality survey of streams utilized 24 sampling stations to evaluate about 84 miles of stream channels with drainage to or within the municipio of Comerio. River and stream samples for fecal coliform and fecal streptococcus analyses were collected on two occasions at base-flow conditions to evaluate the sanitary quality of streams. Bacteriological analyses indicate that about 27 miles of stream reaches within the municipio of Comerio may have fecal coliform bacteria concentrations above the water-quality goal established by the Puerto Rico Environmental Quality Board (Junta de Calidad Ambiental de Puerto Rico) for inland surface waters. Sources of fecal contamination may include illegal discharge of sewage to storm-water drains, malfunction of sanitary

  8. Effects of prolonged exposure to hypobaric hypoxia on oxidative stress, inflammation and gluco-insular regulation: the not-so-sweet price for good regulation.

    Directory of Open Access Journals (Sweden)

    Mario Siervo

    Full Text Available OBJECTIVES: The mechanisms by which low oxygen availability are associated with the development of insulin resistance remain obscure. We thus investigated the relationship between such gluco-insular derangements in response to sustained (hypobaric hypoxemia, and changes in biomarkers of oxidative stress, inflammation and counter-regulatory hormone responses. METHODS: After baseline testing in London (75 m, 24 subjects ascended from Kathmandu (1,300 m to Everest Base Camp (EBC;5,300 m over 13 days. Of these, 14 ascended higher, with 8 reaching the summit (8,848 m. Assessments were conducted at baseline, during ascent to EBC, and 1, 6 and 8 week(s thereafter. Changes in body weight and indices of gluco-insular control were measured (glucose, insulin, C-Peptide, homeostasis model assessment of insulin resistance [HOMA-IR] along with biomarkers of oxidative stress (4-hydroxy-2-nonenal-HNE, inflammation (Interleukin-6 [IL-6] and counter-regulatory hormones (glucagon, adrenalin, noradrenalin. In addition, peripheral oxygen saturation (SpO2 and venous blood lactate concentrations were determined. RESULTS: SpO2 fell significantly from 98.0% at sea level to 82.0% on arrival at 5,300 m. Whilst glucose levels remained stable, insulin and C-Peptide concentrations increased by >200% during the last 2 weeks. Increases in fasting insulin, HOMA-IR and glucagon correlated with increases in markers of oxidative stress (4-HNE and inflammation (IL-6. Lactate levels progressively increased during ascent and remained significantly elevated until week 8. Subjects lost on average 7.3 kg in body weight. CONCLUSIONS: Sustained hypoxemia is associated with insulin resistance, whose magnitude correlates with the degree of oxidative stress and inflammation. The role of 4-HNE and IL-6 as key players in modifying the association between sustained hypoxia and insulin resistance merits further investigation.

  9. Pre-surgical integration of FMRI and DTI of the sensorimotor system in transcortical resection of a high-grade insular astrocytoma

    Directory of Open Access Journals (Sweden)

    Chelsea eEkstrand

    2016-03-01

    Full Text Available Herein we report on a patient with a WHO Grade III astrocytoma in the right insular region in close proximity to the internal capsule who underwent a right frontotemporal craniotomy. Total gross resection of insular gliomas remains surgically challenging based on the possibility of damage to the corticospinal tracts. However, maximizing the extent of resection has been shown to decrease future adverse outcomes. Thus, the goal of such surgeries should focus on maximizing extent of resection while minimizing possible adverse outcomes. In this case, pre-surgical planning included integration of functional magnetic resonance imaging (fMRI and diffusion tensor imaging (DTI, to localize motor and sensory pathways. Novel fMRI tasks were individually developed for the patient to maximize both somatosensory and motor activation simultaneously in areas in close proximity to the tumor. Information obtained was used to optimize resection trajectory and extent, facilitating gross total resection of the astrocytoma. Across all three motor-sensory tasks administered, fMRI revealed an area of interest just superior and lateral to the astrocytoma. Further, DTI analyses showed displacement of the corona radiata around the superior dorsal surface of the astrocytoma, extending in the direction of the activation found using fMRI. Taking into account these results, a transcortical superior temporal gyrus surgical approach was chosen in order to avoid the area of interest identified by fMRI and DTI. Total gross resection was achieved and minor post-surgical motor and sensory deficits were temporary. This case highlights the utility of comprehensive pre-surgical planning, including fMRI and DTI, to maximize surgical outcomes on a case-by-case basis.

  10. Monte Carlo simulations of fluid vesicles

    Science.gov (United States)

    Sreeja, K. K.; Ipsen, John H.; Kumar, P. B. Sunil

    2015-07-01

    Lipid vesicles are closed two dimensional fluid surfaces that are studied extensively as model systems for understanding the physical properties of biological membranes. Here we review the recent developments in the Monte Carlo techniques for simulating fluid vesicles and discuss some of their applications. The technique, which treats the membrane as an elastic sheet, is most suitable for the study of large scale conformations of membranes. The model can be used to study vesicles with fixed and varying topologies. Here we focus on the case of multi-component membranes with the local lipid and protein composition coupled to the membrane curvature leading to a variety of shapes. The phase diagram is more intriguing in the case of fluid vesicles having an in-plane orientational order that induce anisotropic directional curvatures. Methods to explore the steady state morphological structures due to active flux of materials have also been described in the context of Monte Carlo simulations.

  11. Hybrid Monte Carlo with Chaotic Mixing

    CERN Document Server

    Kadakia, Nirag

    2016-01-01

    We propose a hybrid Monte Carlo (HMC) technique applicable to high-dimensional multivariate normal distributions that effectively samples along chaotic trajectories. The method is predicated on the freedom of choice of the HMC momentum distribution, and due to its mixing properties, exhibits sample-to-sample autocorrelations that decay far faster than those in the traditional hybrid Monte Carlo algorithm. We test the methods on distributions of varying correlation structure, finding that the proposed technique produces superior covariance estimates, is less reliant on step-size tuning, and can even function with sparse or no momentum re-sampling. The method presented here is promising for more general distributions, such as those that arise in Bayesian learning of artificial neural networks and in the state and parameter estimation of dynamical systems.

  12. Monte Carlo Simulation for Particle Detectors

    CERN Document Server

    Pia, Maria Grazia

    2012-01-01

    Monte Carlo simulation is an essential component of experimental particle physics in all the phases of its life-cycle: the investigation of the physics reach of detector concepts, the design of facilities and detectors, the development and optimization of data reconstruction software, the data analysis for the production of physics results. This note briefly outlines some research topics related to Monte Carlo simulation, that are relevant to future experimental perspectives in particle physics. The focus is on physics aspects: conceptual progress beyond current particle transport schemes, the incorporation of materials science knowledge relevant to novel detection technologies, functionality to model radiation damage, the capability for multi-scale simulation, quantitative validation and uncertainty quantification to determine the predictive power of simulation. The R&D on simulation for future detectors would profit from cooperation within various components of the particle physics community, and synerg...

  13. PHOTOS Monte Carlo and its theoretical accuracy

    CERN Document Server

    Was, Z; Nanava, G

    2008-01-01

    Because of properties of QED, the bremsstrahlung corrections to decays of particles or resonances can be calculated, with a good precision, separately from other effects. Thanks to the widespread use of event records such calculations can be embodied into a separate module of Monte Carlo simulation chains, as used in High Energy Experiments of today. The PHOTOS Monte Carlo program is used for this purpose since nearly 20 years now. In the following talk let us review the main ideas and constraints which shaped the program version of today and enabled it widespread use. Finally, we will underline importance of aspects related to reliability of program results: event record contents and implementation of channel specific matrix elements.

  14. Composite biasing in Monte Carlo radiative transfer

    CERN Document Server

    Baes, Maarten; Lunttila, Tuomas; Bianchi, Simone; Camps, Peter; Juvela, Mika; Kuiper, Rolf

    2016-01-01

    Biasing or importance sampling is a powerful technique in Monte Carlo radiative transfer, and can be applied in different forms to increase the accuracy and efficiency of simulations. One of the drawbacks of the use of biasing is the potential introduction of large weight factors. We discuss a general strategy, composite biasing, to suppress the appearance of large weight factors. We use this composite biasing approach for two different problems faced by current state-of-the-art Monte Carlo radiative transfer codes: the generation of photon packages from multiple components, and the penetration of radiation through high optical depth barriers. In both cases, the implementation of the relevant algorithms is trivial and does not interfere with any other optimisation techniques. Through simple test models, we demonstrate the general applicability, accuracy and efficiency of the composite biasing approach. In particular, for the penetration of high optical depths, the gain in efficiency is spectacular for the spe...

  15. No-compromise reptation quantum Monte Carlo

    International Nuclear Information System (INIS)

    Since its publication, the reptation quantum Monte Carlo algorithm of Baroni and Moroni (1999 Phys. Rev. Lett. 82 4745) has been applied to several important problems in physics, but its mathematical foundations are not well understood. We show that their algorithm is not of typical Metropolis-Hastings type, and we specify conditions required for the generated Markov chain to be stationary and to converge to the intended distribution. The time-step bias may add up, and in many applications it is only the middle of a reptile that is the most important. Therefore, we propose an alternative, 'no-compromise reptation quantum Monte Carlo' to stabilize the middle of the reptile. (fast track communication)

  16. EU Commissioner Carlos Moedas visits SESAME

    CERN Multimedia

    CERN Bulletin

    2015-01-01

    The European Commissioner for research, science and innovation, Carlos Moedas, visited the SESAME laboratory in Jordan on Monday 13 April. When it begins operation in 2016, SESAME, a synchrotron light source, will be the Middle East’s first major international science centre, carrying out experiments ranging from the physical sciences to environmental science and archaeology.   CERN Director-General Rolf Heuer (left) and European Commissioner Carlos Moedas with the model SESAME magnet. © European Union, 2015.   Commissioner Moedas was accompanied by a European Commission delegation led by Robert-Jan Smits, Director-General of DG Research and Innovation, as well as Rolf Heuer, CERN Director-General, Jean-Pierre Koutchouk, coordinator of the CERN-EC Support for SESAME Magnets (CESSAMag) project and Princess Sumaya bint El Hassan of Jordan, a leading advocate of science in the region. They toured the SESAME facility together with SESAME Director, Khaled Tou...

  17. Monte Carlo Shell Model Mass Predictions

    International Nuclear Information System (INIS)

    The nuclear mass calculation is discussed in terms of large-scale shell model calculations. First, the development and limitations of the conventional shell model calculations are mentioned. In order to overcome the limitations, the Quantum Monte Carlo Diagonalization (QMCD) method has been proposed. The basic formulation and features of the QMCD method are presented as well as its application to the nuclear shell model, referred to as Monte Carlo Shell Model (MCSM). The MCSM provides us with a breakthrough in shell model calculations: the structure of low-lying states can be studied with realistic interactions for a nearly unlimited variety of nuclei. Thus, the MCSM can contribute significantly to the study of nuclear masses. An application to N∼20 unstable nuclei far from the β-stability line is mentioned

  18. Status of Monte Carlo at Los Alamos

    Energy Technology Data Exchange (ETDEWEB)

    Thompson, W.L.; Cashwell, E.D.; Godfrey, T.N.K.; Schrandt, R.G.; Deutsch, O.L.; Booth, T.E.

    1980-05-01

    Four papers were presented by Group X-6 on April 22, 1980, at the Oak Ridge Radiation Shielding Information Center (RSIC) Seminar-Workshop on Theory and Applications of Monte Carlo Methods. These papers are combined into one report for convenience and because they are related to each other. The first paper (by Thompson and Cashwell) is a general survey about X-6 and MCNP and is an introduction to the other three papers. It can also serve as a resume of X-6. The second paper (by Godfrey) explains some of the details of geometry specification in MCNP. The third paper (by Cashwell and Schrandt) illustrates calculating flux at a point with MCNP; in particular, the once-more-collided flux estimator is demonstrated. Finally, the fourth paper (by Thompson, Deutsch, and Booth) is a tutorial on some variance-reduction techniques. It should be required for a fledging Monte Carlo practitioner.

  19. Multilevel Monte Carlo Approaches for Numerical Homogenization

    KAUST Repository

    Efendiev, Yalchin R.

    2015-10-01

    In this article, we study the application of multilevel Monte Carlo (MLMC) approaches to numerical random homogenization. Our objective is to compute the expectation of some functionals of the homogenized coefficients, or of the homogenized solutions. This is accomplished within MLMC by considering different sizes of representative volumes (RVEs). Many inexpensive computations with the smallest RVE size are combined with fewer expensive computations performed on larger RVEs. Likewise, when it comes to homogenized solutions, different levels of coarse-grid meshes are used to solve the homogenized equation. We show that, by carefully selecting the number of realizations at each level, we can achieve a speed-up in the computations in comparison to a standard Monte Carlo method. Numerical results are presented for both one-dimensional and two-dimensional test-cases that illustrate the efficiency of the approach.

  20. Status of Monte Carlo at Los Alamos

    International Nuclear Information System (INIS)

    At Los Alamos the early work of Fermi, von Neumann, and Ulam has been developed and supplemented by many followers, notably Cashwell and Everett, and the main product today is the continuous-energy, general-purpose, generalized-geometry, time-dependent, coupled neutron-photon transport code called MCNP. The Los Alamos Monte Carlo research and development effort is concentrated in Group X-6. MCNP treats an arbitrary three-dimensional configuration of arbitrary materials in geometric cells bounded by first- and second-degree surfaces and some fourth-degree surfaces (elliptical tori). Monte Carlo has evolved into perhaps the main method for radiation transport calculations at Los Alamos. MCNP is used in every technical division at the Laboratory by over 130 users about 600 times a month accounting for nearly 200 hours of CDC-7600 time

  1. Monte Carlo study of real time dynamics

    CERN Document Server

    Alexandru, Andrei; Bedaque, Paulo F; Vartak, Sohan; Warrington, Neill C

    2016-01-01

    Monte Carlo studies involving real time dynamics are severely restricted by the sign problem that emerges from highly oscillatory phase of the path integral. In this letter, we present a new method to compute real time quantities on the lattice using the Schwinger-Keldysh formalism via Monte Carlo simulations. The key idea is to deform the path integration domain to a complex manifold where the phase oscillations are mild and the sign problem is manageable. We use the previously introduced "contraction algorithm" to create a Markov chain on this alternative manifold. We substantiate our approach by analyzing the quantum mechanical anharmonic oscillator. Our results are in agreement with the exact ones obtained by diagonalization of the Hamiltonian. The method we introduce is generic and in principle applicable to quantum field theory albeit very slow. We discuss some possible improvements that should speed up the algorithm.

  2. The lund Monte Carlo for jet fragmentation

    International Nuclear Information System (INIS)

    We present a Monte Carlo program based on the Lund model for jet fragmentation. Quark, gluon, diquark and hadron jets are considered. Special emphasis is put on the fragmentation of colour singlet jet systems, for which energy, momentum and flavour are conserved explicitly. The model for decays of unstable particles, in particular the weak decay of heavy hadrons, is described. The central part of the paper is a detailed description on how to use the FORTRAN 77 program. (Author)

  3. Autocorrelations in hybrid Monte Carlo simulations

    International Nuclear Information System (INIS)

    Simulations of QCD suffer from severe critical slowing down towards the continuum limit. This problem is known to be prominent in the topological charge, however, all observables are affected to various degree by these slow modes in the Monte Carlo evolution. We investigate the slowing down in high statistics simulations and propose a new error analysis method, which gives a realistic estimate of the contribution of the slow modes to the errors. (orig.)

  4. Simulated Annealing using Hybrid Monte Carlo

    OpenAIRE

    Salazar, Rafael; Toral, Raúl

    1997-01-01

    We propose a variant of the simulated annealing method for optimization in the multivariate analysis of differentiable functions. The method uses global actualizations via the hybrid Monte Carlo algorithm in their generalized version for the proposal of new configurations. We show how this choice can improve upon the performance of simulated annealing methods (mainly when the number of variables is large) by allowing a more effective searching scheme and a faster annealing schedule.

  5. A Monte Carlo for BFKL Physics

    OpenAIRE

    Orr, Lynne H.; Stirling, W. J.

    2000-01-01

    Virtual photon scattering in e^+e^- collisions can result in events with the electron-positron pair at large rapidity separation with hadronic activity in between. The BFKL equation resums large logarithms that dominate the cross section for this process. We report here on a Monte Carlo method for solving the BFKL equation that allows kinematic constraints to be taken into account. The application to e^+e^- collisions is in progress.

  6. Monte Carlo Simulations of Star Clusters

    CERN Document Server

    Giersz, M

    2000-01-01

    A revision of Stod\\'o{\\l}kiewicz's Monte Carlo code is used to simulate evolution of large star clusters. The survey on the evolution of multi-mass N-body systems influenced by the tidal field of a parent galaxy and by stellar evolution is discussed. For the first time, the simulation on the "star-by-star" bases of evolution of 1,000,000 body star cluster is presented. \\

  7. A Ballistic Monte Carlo Approximation of {\\pi}

    CERN Document Server

    Dumoulin, Vincent

    2014-01-01

    We compute a Monte Carlo approximation of {\\pi} using importance sampling with shots coming out of a Mossberg 500 pump-action shotgun as the proposal distribution. An approximated value of 3.136 is obtained, corresponding to a 0.17% error on the exact value of {\\pi}. To our knowledge, this represents the first attempt at estimating {\\pi} using such method, thus opening up new perspectives towards computing mathematical constants using everyday tools.

  8. Lookahead Strategies for Sequential Monte Carlo

    OpenAIRE

    Lin, Ming; Chen, Rong; Liu, Jun

    2013-01-01

    Based on the principles of importance sampling and resampling, sequential Monte Carlo (SMC) encompasses a large set of powerful techniques dealing with complex stochastic dynamic systems. Many of these systems possess strong memory, with which future information can help sharpen the inference about the current state. By providing theoretical justification of several existing algorithms and introducing several new ones, we study systematically how to construct efficient SMC algorithms to take ...

  9. Handbook of Markov chain Monte Carlo

    CERN Document Server

    Brooks, Steve

    2011-01-01

    ""Handbook of Markov Chain Monte Carlo"" brings together the major advances that have occurred in recent years while incorporating enough introductory material for new users of MCMC. Along with thorough coverage of the theoretical foundations and algorithmic and computational methodology, this comprehensive handbook includes substantial realistic case studies from a variety of disciplines. These case studies demonstrate the application of MCMC methods and serve as a series of templates for the construction, implementation, and choice of MCMC methodology.

  10. Monte Carlo methods for preference learning

    DEFF Research Database (Denmark)

    Viappiani, P.

    2012-01-01

    Utility elicitation is an important component of many applications, such as decision support systems and recommender systems. Such systems query the users about their preferences and give recommendations based on the system’s belief about the utility function. Critical to these applications is th...... is the acquisition of prior distribution about the utility parameters and the possibility of real time Bayesian inference. In this paper we consider Monte Carlo methods for these problems....

  11. The Moment Guided Monte Carlo Method

    OpenAIRE

    Degond, Pierre; Dimarco, Giacomo; Pareschi, Lorenzo

    2009-01-01

    In this work we propose a new approach for the numerical simulation of kinetic equations through Monte Carlo schemes. We introduce a new technique which permits to reduce the variance of particle methods through a matching with a set of suitable macroscopic moment equations. In order to guarantee that the moment equations provide the correct solutions, they are coupled to the kinetic equation through a non equilibrium term. The basic idea, on which the method relies, consists in guiding the p...

  12. Quantum Monte Carlo for vibrating molecules

    International Nuclear Information System (INIS)

    Quantum Monte Carlo (QMC) has successfully computed the total electronic energies of atoms and molecules. The main goal of this work is to use correlation function quantum Monte Carlo (CFQMC) to compute the vibrational state energies of molecules given a potential energy surface (PES). In CFQMC, an ensemble of random walkers simulate the diffusion and branching processes of the imaginary-time time dependent Schroedinger equation in order to evaluate the matrix elements. The program QMCVIB was written to perform multi-state VMC and CFQMC calculations and employed for several calculations of the H2O and C3 vibrational states, using 7 PES's, 3 trial wavefunction forms, two methods of non-linear basis function parameter optimization, and on both serial and parallel computers. In order to construct accurate trial wavefunctions different wavefunctions forms were required for H2O and C3. In order to construct accurate trial wavefunctions for C3, the non-linear parameters were optimized with respect to the sum of the energies of several low-lying vibrational states. In order to stabilize the statistical error estimates for C3 the Monte Carlo data was collected into blocks. Accurate vibrational state energies were computed using both serial and parallel QMCVIB programs. Comparison of vibrational state energies computed from the three C3 PES's suggested that a non-linear equilibrium geometry PES is the most accurate and that discrete potential representations may be used to conveniently determine vibrational state energies

  13. Monte Carlo dose mapping on deforming anatomy

    Science.gov (United States)

    Zhong, Hualiang; Siebers, Jeffrey V.

    2009-10-01

    This paper proposes a Monte Carlo-based energy and mass congruent mapping (EMCM) method to calculate the dose on deforming anatomy. Different from dose interpolation methods, EMCM separately maps each voxel's deposited energy and mass from a source image to a reference image with a displacement vector field (DVF) generated by deformable image registration (DIR). EMCM was compared with other dose mapping methods: energy-based dose interpolation (EBDI) and trilinear dose interpolation (TDI). These methods were implemented in EGSnrc/DOSXYZnrc, validated using a numerical deformable phantom and compared for clinical CT images. On the numerical phantom with an analytically invertible deformation map, EMCM mapped the dose exactly the same as its analytic solution, while EBDI and TDI had average dose errors of 2.5% and 6.0%. For a lung patient's IMRT treatment plan, EBDI and TDI differed from EMCM by 1.96% and 7.3% in the lung patient's entire dose region, respectively. As a 4D Monte Carlo dose calculation technique, EMCM is accurate and its speed is comparable to 3D Monte Carlo simulation. This method may serve as a valuable tool for accurate dose accumulation as well as for 4D dosimetry QA.

  14. Carlos Castillo-Chavez: a century ahead.

    Science.gov (United States)

    Schatz, James

    2013-01-01

    When the opportunity to contribute a short essay about Dr. Carlos Castillo-Chavez presented itself in the context of this wonderful birthday celebration my immediate reaction was por supuesto que sí! Sixteen years ago, I travelled to Cornell University with my colleague at the National Security Agency (NSA) Barbara Deuink to meet Carlos and hear about his vision to expand the talent pool of mathematicians in our country. Our motivation was very simple. First of all, the Agency relies heavily on mathematicians to carry out its mission. If the U.S. mathematics community is not healthy, NSA is not healthy. Keeping our country safe requires a team of the sharpest minds in the nation to tackle amazing intellectual challenges on a daily basis. Second, the Agency cares deeply about diversity. Within the mathematical sciences, students with advanced degrees from the Chicano, Latino, Native American, and African-American communities are underrepresented. It was clear that addressing this issue would require visionary leadership and a long-term commitment. Carlos had the vision for a program that would provide promising undergraduates from minority communities with an opportunity to gain confidence and expertise through meaningful research experiences while sharing in the excitement of mathematical and scientific discovery. His commitment to the venture was unquestionable and that commitment has not waivered since the inception of the Mathematics and Theoretical Biology Institute (MTBI) in 1996.

  15. municipio de Calakmul, Campeche

    Directory of Open Access Journals (Sweden)

    Elia M. S. Chablé Can

    2007-01-01

    Full Text Available Se analizó la relación entre fuente de ingreso y gasto, asociando las decisiones que tomaron 92 mujeres campesinas de Calakmul, Campeche, sobre qué hacer con el dinero que obtuvieron de cada fuente. Se encontró que el dinero que obtuvieron las mujeres de trabajo, ventas y subsidios propios se gastó en bienes de capital, gasto de lujo y educación de los hijos en mayor proporción que el dinero proveniente de transferencias hechas por sus maridos y otros familiares, que se gastó en bienes de consumo. Esta relación nos permitió discutir la importancia de la fuente de ingreso de las mujeres y su empoderamiento.

  16. Peridiontal disease, buccal hygiene and smoking habit. Palmira municipality, 2007. Enfermedad periodontal, higiene bucal y tabaquismo. Municipio Palmira 2007

    Directory of Open Access Journals (Sweden)

    Alicia Quiñones Betancourt

    2009-02-01

    factores de riesgo más asociado con el desarrollo de la enfermedad periodontal. Objetivo: Caracterizar la relación entre el estado periodontal y la higiene bucal en pacientes fumadores. Método: Estudio descriptivo, epidemiológico y transversal, en adultos fumadores (95 del municipio Palmira durante el período enero a noviembre de 2007. Se aplicó el índice de tratamiento periodontal en la comunidad y el índice de higiene bucal simplificado. Resultados: Se obtuvo una alta prevalencia de la enfermedad periodontal (85,2 %; a medida que fue mayor la intensidad del tabaquismo, se observó mayor deterioro del hábito de higiene bucal. Conclusiones: El estudio muestra una relación importante entre la condición periodontal de los pacientes fumadores, el grado de higiene bucal e intensidad del tabaquismo.

  17. Cooperar para innovar en las microempresas del Municipio de Murcia, Proyecto e-Micro (2005-2007

    Directory of Open Access Journals (Sweden)

    Antonio Juan Briones Peñalver

    2006-05-01

    Full Text Available La realidad empresarial nos muestra el desarrollo de redes interorganizativas de empresas e instituciones que llevan a plantear la estrategia de la cooperación como opción válida para mejorar la ventaja competitiva de las empresas. En este sentido, las asociaciones empresariales y los organismos públicos se están planteando el desarrollo de políticas de promoción para microempresas, que garanticen su viabilidad, favorezcan su adaptación estratégica y fomenten sus ventajas, tales como la mejora del servicio personalizado que brindan a los clientes, así como la rápida respuesta a las oportunidades que genera el entorno. Dentro de esas políticas se enmarca el proyecto e-Micro (2005-2007, de la Iniciativa Comunitaria Equal, financiado por el Fondo Social Europeo y coordinado por la Agrupación de Desarrollo del Ayuntamiento de Murcia, junto con diversas asociaciones e instituciones del entorno de las microempresas, para extender la cultura de la cooperación empresarial mediante el conocimiento de sus ventajas y los distintos mecanismos existentes. Este trabajo tiene como finalidad contribuir a la difusión y fomento de la herramienta de cooperación como estrategia de adaptación al nuevo escenario económico y garantía de permanencia de las empresas en condiciones de rentabilidad. Para ello se ha diseñado un itinerario de intervención con las microempresas del Municipio de Murcia (España que entren a formar parte del proyecto e-Micro. El objetivo del trabajo es explicar las diferentes fases previstas en torno a la cooperación empresarial, acciones de sensibilización y formación, promoción de acuerdos de cooperación, así como la consolidación de la cooperación como instrumento estratégico de las microempresas que formen parte del proyecto e-Micro. Con ese propósito, durante el periodo (2005-2007, se pondrá a disposición de las microempresas una “guía para la cooperación”, se diseñará un “portal web para la

  18. Guideline of Monte Carlo calculation. Neutron/gamma ray transport simulation by Monte Carlo method

    CERN Document Server

    2002-01-01

    This report condenses basic theories and advanced applications of neutron/gamma ray transport calculations in many fields of nuclear energy research. Chapters 1 through 5 treat historical progress of Monte Carlo methods, general issues of variance reduction technique, cross section libraries used in continuous energy Monte Carlo codes. In chapter 6, the following issues are discussed: fusion benchmark experiments, design of ITER, experiment analyses of fast critical assembly, core analyses of JMTR, simulation of pulsed neutron experiment, core analyses of HTTR, duct streaming calculations, bulk shielding calculations, neutron/gamma ray transport calculations of the Hiroshima atomic bomb. Chapters 8 and 9 treat function enhancements of MCNP and MVP codes, and a parallel processing of Monte Carlo calculation, respectively. An important references are attached at the end of this report.

  19. Diseño de una instalación eléctrica en un teatro del municipio de Xátiva

    OpenAIRE

    PALOMINO JUÁREZ, LUIS

    2015-01-01

    [ES] Este Trabajo de Fin de Grado tiene como objetivo la realización de una instalación eléctrica en baja tensión de un teatro situado en el municipio de Xátiva. La instalación abarca el diseño para la instalación de iluminación normal, de iluminación de emergencia y líneas de fuerza, cumpliendo con la normativa del REBT para locales de pública concurrencia. El procedimiento a seguir para el correcto diseño ha sido: - Establecer las condiciones del lugar mediante la distribució...

  20. IMPLANTACIÓN DE ENERGIAS RENOVABLES Y ESTIMACIÓN DE LA HUELLA DE CARBONO EN EL MUNICIPIO DE BLANCA (MURCIA

    Directory of Open Access Journals (Sweden)

    José Molina Ruiz

    2012-01-01

    Full Text Available La introducción del concepto de sostenibilidad en el mercado energético implica la potenciación de las energías renovables activando políticas que fomenten su implantación. El éxito de estas políticas se plasmará en el incremento de participación de las energías renovables en el mix energético, en la reducción de emisiones de CO2 y en el cumplimiento de los compromisos internacionales. Este trabajo analiza el grado de implantación de las energías renovables en un municipio de la Región de Murcia (Blanca, valorando la incidencia de la legislación sectorial energética y estimando la huella de carbono derivada del consumo de energía eléctrica.

  1. Evaluación del potencial acuífero de los municipios de Puerto Berrío y Puerto Nare.

    OpenAIRE

    Arismendy Mejía, Rubén Darío; Salazar Villegas, Juan Fernando; Vélez Otálvaro, María Victoria; Caballero Acosta, Humberto

    2004-01-01

    Se presenta el análisis del potencial acuífero de un área de 470 km2 correspondiente a los municipios de Puerto Berrío y Puerto Nare en donde se presenta una demanda importante de agua, que puede ser satisfecha, mediante la explotación del agua subterránea. Según este propósito, se siguío un proceso de recopilación de información, estudio hidrológico, prospección geoélectrica (84 SEV), inventario de puntos de agua, levantamiento geológico y geomorfológico, y estudio de la calidad del agua....

  2. La actuación del Instituto Nacional de Colonización en el municipio de Hellín (Albacete)

    OpenAIRE

    Canales Martínez, Gregorio; Jerez Cordero, David

    1993-01-01

    A mediados de la década de los cincuenta de la centuria actual, el Estado declara el Canal de Riegos de Hellín, en la provincia de Albacete, de alto interés nacional para la colonización agrícola. Para la puesta en riego se contó con una concesión de caudales del río Mundo de 1.000 l/s, así como del alumbramiento de aguas hipogeas. Con ello se pretendía paliar la crisis económica por la que atravesaba el municipio hellinero, derivada de la ruina de la tradicional industria text...

  3. La participación en los procesos de desarrollo. El caso de cuatro organizaciones de la sociedad civil en el municipio de Cuetzalán, Puebla

    Directory of Open Access Journals (Sweden)

    Sergio Enrique Hernández-Loeza

    2011-01-01

    Full Text Available El concepto de desarrollo se ha entendido de diferentes maneras, de acuerdo con la perspectiva teórica de que se parta, y su uso lo han criticado duramente diferentes autores. En las páginas siguientes se argumenta a favor de retomar la noción antropológica del desarrollo, ubicando la importancia del análisis micro de los procesos de desarrollo para dar cuenta de los anhelos de la población y las dificultades que enfrentan para realizar ejercicios participativos y generar redes de colaboración. Con base en el análisis de la experiencia de cuatro organizaciones de la sociedad civil ubicadas en el municipio de Cuetzalán, Puebla, se muestran algunos de los alcances, retos y límites de la participación en los procesos de desarrollo.

  4. La droga, el contexto y el Estado. Jóvenes de estratos sociales medios y altos y su consumo “recreativo” en tres municipios de El Salvador

    Directory of Open Access Journals (Sweden)

    Augusto Rigoberto López Ramírez

    2013-08-01

    Full Text Available Se estudia a los jóvenes de estratos medios y altos y su consumo recreativo de drogas influido por factores de tipo estructural y cultural, abordando cuatro zonas de concentración de bares y discotecas en tres municipios importantes de El Salvador. El énfasis se hace en la generación del contexto para suplir la demanda del consumo de dicha población y las consecuencias que esto le significa a la sociedad. Se concluye con un llamado al Estado a que regule los espacios de interés social. DOI: http://dx.doi.org/10.5377/rpsp.v2i0.1194

  5. Análisis espacial de los aspectos demográficos, agrarios y ambientales de tres municipios de La Montaña de Guerrero

    Directory of Open Access Journals (Sweden)

    Karina Pérez Reyna

    1998-01-01

    Full Text Available Can base en el uso de un sistema de información geográfica (ILWIS, se examinan los aspectos ecológicos. caracteristicas demográficas, limites agrarios, sistemas de producción y grados de deterioro ambiental en las comunidades indígenas de los municipios de Tiapa, Xaipatláhuac y Copanatoyac de la Montaña de Guerrero. Se llega. al final del estudio, a aseverar que los patrones de vida y el tipo de tecnología empleada en el maneja de recursos naturales, más que la densidad de población municipal son factores que tienen que ver con la degradación del ambiente

  6. Diagnóstico del uso de las TIC en estudiantes de colegios oficiales del municipio de Soledad (Atlántico

    Directory of Open Access Journals (Sweden)

    Everly Castellar Paternina

    2011-01-01

    La muestra fue por conveniencia, constituida por 312 estudiantes matriculados actualmente en diferentes grados de enseñanza media de tres colegios oficiales del Municipio de Soledad-Atlántico. Se realizó una entrevista con preguntas abiertas sobre el potencial que perciben tener los estudiantes y las oportunidades de usar las TIC y se utilizó una encuesta que incluía preguntas relacionadas con la utilidad y beneficios de la enseñanza recibida, habilidad en el manejo de las herramientas y la disposición presentada hacia el tema del uso de las TIC. Los resultados indican que en esta zona del Departamento del Atlántico, los educandos conservan un alto índice de actitud positiva frente a su uso, pero una baja oferta de recursos tecnológicos que estimule y preserve el potencial.

  7. Surface-water, water-quality, and ground-water assessment of the Municipio of Carolina, Puerto Rico, 1997-99

    Science.gov (United States)

    Rodríguez-Martínez, Jesús; Gómez-Gómez, Fernando; Santiago-Rivera, Luis; Oliveras-Feliciano, M. L.

    2001-01-01

    To meet the increasing need for a safe and adequate supply of water in the municipio of Carolina, an integrated surface-water, water-quality, and ground-water assessment of the area was conducted. The major results of this study and other important hydrologic and water-quality features were compiled in a Geographic Information System and are presented in two 1:30,000-scale map plates to facilitate interpretation and use of the diverse water-resources data. Because the supply of safe drinking water was a critical issue during recent dry periods, the surface-water assessment portion of this study focused on analysis of low-flow characteristics in local streams and rivers. Low-flow characteristics were evaluated for one continuous-record gaging station, based on graphical curve-fitting techniques and log-Pearson Type III frequency analysis. Estimates of low-flow characteristics for seven partial-record stations were generated using graphical-correlation techniques. Flow-duration characteristics were computed for the one continuous-record gaging station and were estimated for the partial-record stations using the relation curves developed from the low-flow study. Stream low-flow statistics document the general hydrology under current land and water use. Low-flow statistics may substantially change as a result of streamflow diversions for public supply, and an increase in ground-water development, waste-water discharges, and flood-control measures; the current analysis provides baseline information to evaluate these impacts and develop water budgets. A sanitary quality survey of streams utilized 29 sampling stations to evaluate the sanitary quality of about 87 miles of stream channels. River and stream samples were collected on two occasions during base-flow conditions and were analyzed for fecal coliform and fecal streptococcus. Bacteriological analyses indicate that a significant portion of the stream reaches within the municipio of Carolina may have fecal coliform

  8. ambiental de agricultores orgánicos y convencionales en el ejido La Ciénega, municipio de El Limón, Jalisco, México

    Directory of Open Access Journals (Sweden)

    Rodolfo González-Figueroa

    2007-01-01

    Full Text Available La agricultura moderna en México está causando contaminación y erosión; de ello deriva la creciente pobreza y marginación que se padece en diversas zonas rurales, donde la cultura y el sustento dependen de la agricultura. Entender y responder al fenómeno de la degradación ambiental implica comprender las ideas, valores y esperanzas de los campesinos y, a partir de ello, construir alternativas. En este artículo se presentan cuatro estudios de caso en el ejido de La Ciénega, municipio El Limón, en la región Costa Sur de Jalisco, México, buscando contextualizar estos casos en el debate sobre el desarrollo sustentable.

  9. Fission Matrix Capability for MCNP Monte Carlo

    Energy Technology Data Exchange (ETDEWEB)

    Carney, Sean E. [Los Alamos National Laboratory; Brown, Forrest B. [Los Alamos National Laboratory; Kiedrowski, Brian C. [Los Alamos National Laboratory; Martin, William R. [Los Alamos National Laboratory

    2012-09-05

    In a Monte Carlo criticality calculation, before the tallying of quantities can begin, a converged fission source (the fundamental eigenvector of the fission kernel) is required. Tallies of interest may include powers, absorption rates, leakage rates, or the multiplication factor (the fundamental eigenvalue of the fission kernel, k{sub eff}). Just as in the power iteration method of linear algebra, if the dominance ratio (the ratio of the first and zeroth eigenvalues) is high, many iterations of neutron history simulations are required to isolate the fundamental mode of the problem. Optically large systems have large dominance ratios, and systems containing poor neutron communication between regions are also slow to converge. The fission matrix method, implemented into MCNP[1], addresses these problems. When Monte Carlo random walk from a source is executed, the fission kernel is stochastically applied to the source. Random numbers are used for: distances to collision, reaction types, scattering physics, fission reactions, etc. This method is used because the fission kernel is a complex, 7-dimensional operator that is not explicitly known. Deterministic methods use approximations/discretization in energy, space, and direction to the kernel. Consequently, they are faster. Monte Carlo directly simulates the physics, which necessitates the use of random sampling. Because of this statistical noise, common convergence acceleration methods used in deterministic methods do not work. In the fission matrix method, we are using the random walk information not only to build the next-iteration fission source, but also a spatially-averaged fission kernel. Just like in deterministic methods, this involves approximation and discretization. The approximation is the tallying of the spatially-discretized fission kernel with an incorrect fission source. We address this by making the spatial mesh fine enough that this error is negligible. As a consequence of discretization we get a

  10. Mal de Chagas y factores geográficos. Propuesta de zonificación del riesgo epidemiológico, municipio Araure, Estado Portuguesa. Venezuela

    Directory of Open Access Journals (Sweden)

    Karen Rojas

    2015-01-01

    Full Text Available Son numerosas las enfermedades transmitidas por vectores que afectan la salud y que han sido objeto de estudio, en este sentido, el mal de Chagas es la cuarta forma más importante de enfermedad tropical, superada solamente por la malaria, la tuberculosis y la esquistosomiasis. Según la OPS (2014, la enfermedad está asociada a factores ambientales y sociales que expone a millones de personas a la infección. El objetivo de este trabajo es proponer una zonificación del riesgo epidemiológico del mal de Chagas en el municipio Araure, estado Portuguesa, Venezuela, a partir del uso de la matriz multicriterio. Se realizó una caracterización de los factores físico naturales (altitud, temperatura, precipitación, humedad relativa y socioeconómicos (estructura de la población, actividades económicas, tipo de viviendas, pobreza, de igual manera se hizo una caracterización del mal de Chagas. Los resultados establecieron que existe un área de riesgo epidemiológico al contagio del mal de Chagas en el municipio, específicamente en las áreas rurales ubicadas en el extremo oeste del área de estudio donde predominan las viviendas tipo rancho. Se concluye que el área es vulnerable al mal de Chagas y deben fortalecerse las medidas de prevención y control. Una de estas medidas seria realizar campañas de difusión sobre la prevención y control de la enfermedad, a través de todos los medios de comunicación y capacitación y educación comunitaria que conlleven a ampliar las actividades de vigilancia.

  11. Oferta de valor como estrategia de diferenciación en los establecimientos franquiciados de comida rápida en el municipio Maracaibo

    Directory of Open Access Journals (Sweden)

    Nancy Andrade

    2007-01-01

    Full Text Available A medida que crece el número de empresas que ofrecen servicios, los inversionistas se esfuerzan por presentar características distintivas, para ello desarrollan estrategias globales en diferentes ramas de este sector. En este contexto, el objetivo del artículo es "analizar la oferta de valor como estrategia de diferenciación en los establecimientos franquiciados de comida rápida en el municipio Maracaibo", resaltando los aportes teóricos de Zeithaml y Bitner (2002 y Lovelock (1997. La investigación es descriptiva, con un diseño no experimental de campo, cuya fuente principal de información fueron las entrevistas realizadas a 23 gerentes de los establecimientos registrados en Profranquicias y ubicados en los malls del municipio. Entre los resultados destacan que el producto tangible más ofrecido son las hamburguesas (26,1%. El servicio que agrega valor es el menú variado con atención al cliente (91,3%, mientras los que complementan la venta son la diversidad de formas de pagos (47,8%. Los principales elementos de la oferta de valor son la rapidez y la calidad de los productos (82,6% respectivamente, mientras, la calidad del servicio (52,2%, es la estrategia que permite lograr una ventaja competitiva y la diferenciación en el sistema de franquicias. Concluyendo que la oferta de valor que estos establecimientos presentan es un atractivo, ya que la misma funciona como estrategia para diferenciarse de la competencia y posicionarse en el mercado, satisfaciendo al mayor número de consumidores posibles y manteniendo el negocio exitoso.

  12. Transitando hacia el desarrollo local por el camino de las políticas de información: caso municipio Maracaibo

    Directory of Open Access Journals (Sweden)

    Dionnys Peña Ocando

    2007-01-01

    Full Text Available Los planteamientos expresados en las políticas públicas resultan fundamentales para impulsar u obstaculizar el desarrollo de una localidad determinada, por tal razón nuestro propósito es analizar los rasgos de desarrollo local en políticas de información (PI formuladas por la Alcaldía de Maracaibo y sus entes paramunicipales entre 1999-2003. Para el logro del referido objetivo se desarrolló una investigación documental que permitió la extracción de indicadores o rasgos teóricos del desarrollo local y se comprobó la presencia de tales rasgos en realidad municipal estudiada, mediante la aplicación de un cuestionario semi-estructurado a los directivos responsables de la gestión de políticas en el municipio y el análisis de documentos de gestión. Los resultados muestran la identificación de informalidad y poca sistematización en las PI, autonomía en su generación, intencionalidad hacia la modernización de la gestión pública, prioridad hacia las áreas de organización, promoción y automatización de información, al igual que un rol tradicional de atención a necesidades intrainstitucionales con poca presencia de rasgos como la consideración de intereses de la comunidad, incremento de la capacidad innovadora, generación de servicios para las comunidades, entre otros. Se concluye que el Municipio Maracaibo transita un camino con obstáculos hacia su desarrollo integral, en virtud de la ausencia de rasgos de desarrollo significativos en las PI formuladas y ejecutadas por los entes municipales competentes.

  13. Comunicar para la cercanía: análisis de la comunicación política de un municipio mexicano

    Directory of Open Access Journals (Sweden)

    Abel Antonio Grijalva Verdugo

    2016-09-01

    Full Text Available La tarea de los gobiernos municipales en materia de comunicación política es compleja, se necesitan mecanismos profesionales y académicos con sustento científico a fin de generar mensajes efectivos para todos los actores sociales y poder así construir una comunicación de la cercanía. El presente artículo examina los flujos comunicativos de un municipio mexicano, la socialización de sus acciones en diversos medios de comunicación y la percepción ciudadana respecto a su gestión. La recolección de datos se realizó transcurrido el primer año de la administración municipal, entre 2014 y 2016. La muestra está constituida por un total de 203 sujetos clasificados por escolaridad y sexo en siete de las alcaldías que conforman el municipio analizado: se les aplicó un cuestionario estructurado con trece variables con el objetivo de conocer su percepción sobre las unidades de análisis de satisfacción de la comunicación gubernamental y participación en redes sociales. Los resultados muestran un panorama sobre las deficiencias y aspectos positivos observados por las audiencias respecto a lo que comunican sus gobernantes, así como los distintos niveles de significación colectiva sobre la comunicación política. Se efectuaron pruebas no paramétricas para identificar diferencias estadísticamente significativas desde las variables de agrupación del estudio.

  14. Quantum Monte Carlo for vibrating molecules

    Energy Technology Data Exchange (ETDEWEB)

    Brown, W.R. [Univ. of California, Berkeley, CA (United States). Chemistry Dept.]|[Lawrence Berkeley National Lab., CA (United States). Chemical Sciences Div.

    1996-08-01

    Quantum Monte Carlo (QMC) has successfully computed the total electronic energies of atoms and molecules. The main goal of this work is to use correlation function quantum Monte Carlo (CFQMC) to compute the vibrational state energies of molecules given a potential energy surface (PES). In CFQMC, an ensemble of random walkers simulate the diffusion and branching processes of the imaginary-time time dependent Schroedinger equation in order to evaluate the matrix elements. The program QMCVIB was written to perform multi-state VMC and CFQMC calculations and employed for several calculations of the H{sub 2}O and C{sub 3} vibrational states, using 7 PES`s, 3 trial wavefunction forms, two methods of non-linear basis function parameter optimization, and on both serial and parallel computers. In order to construct accurate trial wavefunctions different wavefunctions forms were required for H{sub 2}O and C{sub 3}. In order to construct accurate trial wavefunctions for C{sub 3}, the non-linear parameters were optimized with respect to the sum of the energies of several low-lying vibrational states. In order to stabilize the statistical error estimates for C{sub 3} the Monte Carlo data was collected into blocks. Accurate vibrational state energies were computed using both serial and parallel QMCVIB programs. Comparison of vibrational state energies computed from the three C{sub 3} PES`s suggested that a non-linear equilibrium geometry PES is the most accurate and that discrete potential representations may be used to conveniently determine vibrational state energies.

  15. A Monte Carlo approach to water management

    Science.gov (United States)

    Koutsoyiannis, D.

    2012-04-01

    Common methods for making optimal decisions in water management problems are insufficient. Linear programming methods are inappropriate because hydrosystems are nonlinear with respect to their dynamics, operation constraints and objectives. Dynamic programming methods are inappropriate because water management problems cannot be divided into sequential stages. Also, these deterministic methods cannot properly deal with the uncertainty of future conditions (inflows, demands, etc.). Even stochastic extensions of these methods (e.g. linear-quadratic-Gaussian control) necessitate such drastic oversimplifications of hydrosystems that may make the obtained results irrelevant to the real world problems. However, a Monte Carlo approach is feasible and can form a general methodology applicable to any type of hydrosystem. This methodology uses stochastic simulation to generate system inputs, either unconditional or conditioned on a prediction, if available, and represents the operation of the entire system through a simulation model as faithful as possible, without demanding a specific mathematical form that would imply oversimplifications. Such representation fully respects the physical constraints, while at the same time it evaluates the system operation constraints and objectives in probabilistic terms, and derives their distribution functions and statistics through Monte Carlo simulation. As the performance criteria of a hydrosystem operation will generally be highly nonlinear and highly nonconvex functions of the control variables, a second Monte Carlo procedure, implementing stochastic optimization, is necessary to optimize system performance and evaluate the control variables of the system. The latter is facilitated if the entire representation is parsimonious, i.e. if the number of control variables is kept at a minimum by involving a suitable system parameterization. The approach is illustrated through three examples for (a) a hypothetical system of two reservoirs

  16. Modulated pulse bathymetric lidar Monte Carlo simulation

    Science.gov (United States)

    Luo, Tao; Wang, Yabo; Wang, Rong; Du, Peng; Min, Xia

    2015-10-01

    A typical modulated pulse bathymetric lidar system is investigated by simulation using a modulated pulse lidar simulation system. In the simulation, the return signal is generated by Monte Carlo method with modulated pulse propagation model and processed by mathematical tools like cross-correlation and digital filter. Computer simulation results incorporating the modulation detection scheme reveal a significant suppression of the water backscattering signal and corresponding target contrast enhancement. More simulation experiments are performed with various modulation and reception variables to investigate the effect of them on the bathymetric system performance.

  17. Monte Carlo Simulation of an American Option

    Directory of Open Access Journals (Sweden)

    Gikiri Thuo

    2007-04-01

    Full Text Available We implement gradient estimation techniques for sensitivity analysis of option pricing which can be efficiently employed in Monte Carlo simulation. Using these techniques we can simultaneously obtain an estimate of the option value together with the estimates of sensitivities of the option value to various parameters of the model. After deriving the gradient estimates we incorporate them in an iterative stochastic approximation algorithm for pricing an option with early exercise features. We illustrate the procedure using an example of an American call option with a single dividend that is analytically tractable. In particular we incorporate estimates for the gradient with respect to the early exercise threshold level.

  18. Discovering correlated fermions using quantum Monte Carlo.

    Science.gov (United States)

    Wagner, Lucas K; Ceperley, David M

    2016-09-01

    It has become increasingly feasible to use quantum Monte Carlo (QMC) methods to study correlated fermion systems for realistic Hamiltonians. We give a summary of these techniques targeted at researchers in the field of correlated electrons, focusing on the fundamentals, capabilities, and current status of this technique. The QMC methods often offer the highest accuracy solutions available for systems in the continuum, and, since they address the many-body problem directly, the simulations can be analyzed to obtain insight into the nature of correlated quantum behavior. PMID:27518859

  19. A Monte Carlo algorithm for degenerate plasmas

    Energy Technology Data Exchange (ETDEWEB)

    Turrell, A.E., E-mail: a.turrell09@imperial.ac.uk; Sherlock, M.; Rose, S.J.

    2013-09-15

    A procedure for performing Monte Carlo calculations of plasmas with an arbitrary level of degeneracy is outlined. It has possible applications in inertial confinement fusion and astrophysics. Degenerate particles are initialised according to the Fermi–Dirac distribution function, and scattering is via a Pauli blocked binary collision approximation. The algorithm is tested against degenerate electron–ion equilibration, and the degenerate resistivity transport coefficient from unmagnetised first order transport theory. The code is applied to the cold fuel shell and alpha particle equilibration problem of inertial confinement fusion.

  20. Monte Carlo method in radiation transport problems

    International Nuclear Information System (INIS)

    In neutral radiation transport problems (neutrons, photons), two values are important: the flux in the phase space and the density of particles. To solve the problem with Monte Carlo method leads to, among other things, build a statistical process (called the play) and to provide a numerical value to a variable x (this attribution is called score). Sampling techniques are presented. Play biasing necessity is proved. A biased simulation is made. At last, the current developments (rewriting of programs for instance) are presented due to several reasons: two of them are the vectorial calculation apparition and the photon and neutron transport in vacancy media

  1. Introduction to Monte-Carlo method

    International Nuclear Information System (INIS)

    We recall first some well known facts about random variables and sampling. Then we define the Monte-Carlo method in the case where one wants to compute a given integral. Afterwards, we ship to discrete Markov chains for which we define random walks, and apply to finite difference approximations of diffusion equations. Finally we consider Markov chains with continuous state (but discrete time), transition probabilities and random walks, which are the main piece of this work. The applications are: diffusion and advection equations, and the linear transport equation with scattering

  2. IN MEMORIAM CARLOS RESTREPO. UN VERDADERO MAESTRO

    OpenAIRE

    Pelayo Correa

    2009-01-01

    Carlos Restrepo fue el primer profesor de Patología y un miembro ilustre del grupo de pioneros que fundaron la Facultad de Medicina de la Universidad del Valle. Estos pioneros convergieron en Cali en la década de 1950, en posesión de un espíritu renovador y creativo que emprendió con mucho éxito la labor de cambiar la cultura académica del Valle del Cauca. Ellos encontraron una sociedad apacible, que disfrutaba de la generosidad de su entorno, sin deseos de romper las tradiciones centenarias ...

  3. Hybrid Monte Carlo simulation of polymer chains

    CERN Document Server

    Irbäck, A

    1993-01-01

    We develop the hybrid Monte Carlo method for simulations of single off-lattice polymer chains. We discuss implementation and choice of simulation parameters in some detail. The performance of the algorithm is tested on models for homopolymers with short- or long-range self-repulsion, using chains with $16\\le N\\le 512$ monomers. Without excessive fine tuning, we find that the computational cost grows as $N^{2+z^\\prime}$ with $0.64

  4. Carlos Pereda y la cultura argumental

    OpenAIRE

    Eduardo Harada O.

    2010-01-01

    En este artículo se discute la fenomenología de la atención argumental de Carlos Pereda. Se trata de mostrar que esta fenomenología toma en cuenta todos los aspectos de la argumentación, principalmente, las reglas y virtudes epistémicas que sirven para controlar esta actividad de manera interna así como evitar los vértigos argumentales, además, no sólo estudia a los argumentos o apoyos determinados o deductivos sino, igualmente, a los subdeterminados, pues sostiene que éstos son una parte imp...

  5. The Moment Guided Monte Carlo Method

    CERN Document Server

    Degond, Pierre; Pareschi, Lorenzo

    2009-01-01

    In this work we propose a new approach for the numerical simulation of kinetic equations through Monte Carlo schemes. We introduce a new technique which permits to reduce the variance of particle methods through a matching with a set of suitable macroscopic moment equations. In order to guarantee that the moment equations provide the correct solutions, they are coupled to the kinetic equation through a non equilibrium term. The basic idea, on which the method relies, consists in guiding the particle positions and velocities through moment equations so that the concurrent solution of the moment and kinetic models furnishes the same macroscopic quantities.

  6. by means of FLUKA Monte Carlo method

    Directory of Open Access Journals (Sweden)

    Ermis Elif Ebru

    2015-01-01

    Full Text Available Calculations of gamma-ray mass attenuation coefficients of various detector materials (crystals were carried out by means of FLUKA Monte Carlo (MC method at different gamma-ray energies. NaI, PVT, GSO, GaAs and CdWO4 detector materials were chosen in the calculations. Calculated coefficients were also compared with the National Institute of Standards and Technology (NIST values. Obtained results through this method were highly in accordance with those of the NIST values. It was concluded from the study that FLUKA MC method can be an alternative way to calculate the gamma-ray mass attenuation coefficients of the detector materials.

  7. Exascale Monte Carlo R&D

    Energy Technology Data Exchange (ETDEWEB)

    Marcus, Ryan C. [Los Alamos National Laboratory

    2012-07-24

    Overview of this presentation is (1) Exascale computing - different technologies, getting there; (2) high-performance proof-of-concept MCMini - features and results; and (3) OpenCL toolkit - Oatmeal (OpenCL Automatic Memory Allocation Library) - purpose and features. Despite driver issues, OpenCL seems like a good, hardware agnostic tool. MCMini demonstrates the possibility for GPGPU-based Monte Carlo methods - it shows great scaling for HPC application and algorithmic equivalence. Oatmeal provides a flexible framework to aid in the development of scientific OpenCL codes.

  8. Discovering correlated fermions using quantum Monte Carlo

    Science.gov (United States)

    Wagner, Lucas K.; Ceperley, David M.

    2016-09-01

    It has become increasingly feasible to use quantum Monte Carlo (QMC) methods to study correlated fermion systems for realistic Hamiltonians. We give a summary of these techniques targeted at researchers in the field of correlated electrons, focusing on the fundamentals, capabilities, and current status of this technique. The QMC methods often offer the highest accuracy solutions available for systems in the continuum, and, since they address the many-body problem directly, the simulations can be analyzed to obtain insight into the nature of correlated quantum behavior.

  9. Monte Carlo simulations for heavy ion dosimetry

    OpenAIRE

    Geithner, Oksana

    2006-01-01

    Water-to-air stopping power ratio ( ) calculations for the ionization chamber dosimetry of clinically relevant ion beams with initial energies from 50 to 450 MeV/u have been performed using the Monte Carlo technique. To simulate the transport of a particle in water the computer code SHIELD-HIT v2 was used which is a substantially modified version of its predecessor SHIELD-HIT v1. The code was partially rewritten, replacing formerly used single precision variables with double precision variabl...

  10. Markov chains analytic and Monte Carlo computations

    CERN Document Server

    Graham, Carl

    2014-01-01

    Markov Chains: Analytic and Monte Carlo Computations introduces the main notions related to Markov chains and provides explanations on how to characterize, simulate, and recognize them. Starting with basic notions, this book leads progressively to advanced and recent topics in the field, allowing the reader to master the main aspects of the classical theory. This book also features: Numerous exercises with solutions as well as extended case studies.A detailed and rigorous presentation of Markov chains with discrete time and state space.An appendix presenting probabilistic notions that are nec

  11. State-of-the-art Monte Carlo 1988

    Energy Technology Data Exchange (ETDEWEB)

    Soran, P.D.

    1988-06-28

    Particle transport calculations in highly dimensional and physically complex geometries, such as detector calibration, radiation shielding, space reactors, and oil-well logging, generally require Monte Carlo transport techniques. Monte Carlo particle transport can be performed on a variety of computers ranging from APOLLOs to VAXs. Some of the hardware and software developments, which now permit Monte Carlo methods to be routinely used, are reviewed in this paper. The development of inexpensive, large, fast computer memory, coupled with fast central processing units, permits Monte Carlo calculations to be performed on workstations, minicomputers, and supercomputers. The Monte Carlo renaissance is further aided by innovations in computer architecture and software development. Advances in vectorization and parallelization architecture have resulted in the development of new algorithms which have greatly reduced processing times. Finally, the renewed interest in Monte Carlo has spawned new variance reduction techniques which are being implemented in large computer codes. 45 refs.

  12. Monte Carlo simulations in theoretical physic; Simulations Monte Carlo en physique theorique

    Energy Technology Data Exchange (ETDEWEB)

    Billoire, A.

    1991-12-31

    After a presentation of the MONTE CARLO method principle, the method is applied, first to the critical exponents calculations in the three dimensions ISING model, and secondly to the discrete quantum chromodynamic with calculation times in function of computer power. 28 refs., 4 tabs.

  13. PAISAGENS INSULARES DO CEARÁ: distribuição geográfica e caracterização estrutural nas bacias Metropolitana, Curu e Médio Jaguaribe

    OpenAIRE

    Arnóbio de Mendonça Barreto Cavalcante; Niepson de Sousa Arruda; Francisco Feliciano do Rego Filho

    2008-01-01

    He construction of perennial dams in Northeast of Brazil set in action the fragmentation of landscapes, producing insular landscapes or artificial islands. The State of Ceará possesses a significance number of them and the present work determined number, distribution, geographic localization of lake islands found in basins Metropolitana, Curu and Médio Jaguaribe, and characterizing each of them regarding to size, shape and degree of insulation. Images from selected dams were used to plot maps...

  14. Challenges and prospects for whole-coremonte Carlo analysis

    International Nuclear Information System (INIS)

    The advantages for using Monte Carlo methods to analyze full-core reactor configurations include essentially exact representation of geometry and physical phenomena that are important for reactor analysis. But this substantial advantage comes at a substantial cost because of the computational burden, both in terms of memory demand and computational time. This paper focuses on the challenges facing full-core Monte Carlo for keff calculations and the prospects for Monte Carlo becoming a routine tool for reactor analysis.

  15. Temperature variance study in Monte-Carlo photon transport theory

    International Nuclear Information System (INIS)

    We study different Monte-Carlo methods for solving radiative transfer problems, and particularly Fleck's Monte-Carlo method. We first give the different time-discretization schemes and the corresponding stability criteria. Then we write the temperature variance as a function of the variances of temperature and absorbed energy at the previous time step. Finally we obtain some stability criteria for the Monte-Carlo method in the stationary case

  16. Discrete diffusion Monte Carlo for frequency-dependent radiative transfer

    Energy Technology Data Exchange (ETDEWEB)

    Densmore, Jeffrey D [Los Alamos National Laboratory; Kelly, Thompson G [Los Alamos National Laboratory; Urbatish, Todd J [Los Alamos National Laboratory

    2010-11-17

    Discrete Diffusion Monte Carlo (DDMC) is a technique for increasing the efficiency of Implicit Monte Carlo radiative-transfer simulations. In this paper, we develop an extension of DDMC for frequency-dependent radiative transfer. We base our new DDMC method on a frequency-integrated diffusion equation for frequencies below a specified threshold. Above this threshold we employ standard Monte Carlo. With a frequency-dependent test problem, we confirm the increased efficiency of our new DDMC technique.

  17. Unbiased combinations of nonanalog Monte Carlo techniques and fair games

    International Nuclear Information System (INIS)

    Historically, Monte Carlo variance reduction techniques have developed one at a time in response to calculational needs. This paper provides the theoretical basis for obtaining unbiased Monte Carlo estimates from all possible combinations of variance reduction techniques. Hitherto, the techniques have not been proven to be unbiased in arbitrary combinations. The authors are unaware of any Monte Carlo techniques (in any linear process) that are not treated by the theorem herein. (author)

  18. Alternative Monte Carlo Approach for General Global Illumination

    Institute of Scientific and Technical Information of China (English)

    徐庆; 李朋; 徐源; 孙济洲

    2004-01-01

    An alternative Monte Carlo strategy for the computation of global illumination problem was presented.The proposed approach provided a new and optimal way for solving Monte Carlo global illumination based on the zero variance importance sampling procedure. A new importance driven Monte Carlo global illumination algorithm in the framework of the new computing scheme was developed and implemented. Results, which were obtained by rendering test scenes, show that this new framework and the newly derived algorithm are effective and promising.

  19. MontePython: Implementing Quantum Monte Carlo using Python

    OpenAIRE

    J.K. Nilsen

    2006-01-01

    We present a cross-language C++/Python program for simulations of quantum mechanical systems with the use of Quantum Monte Carlo (QMC) methods. We describe a system for which to apply QMC, the algorithms of variational Monte Carlo and diffusion Monte Carlo and we describe how to implement theses methods in pure C++ and C++/Python. Furthermore we check the efficiency of the implementations in serial and parallel cases to show that the overhead using Python can be negligible.

  20. Combinatorial nuclear level density by a Monte Carlo method

    OpenAIRE

    Cerf, N.

    1993-01-01

    We present a new combinatorial method for the calculation of the nuclear level density. It is based on a Monte Carlo technique, in order to avoid a direct counting procedure which is generally impracticable for high-A nuclei. The Monte Carlo simulation, making use of the Metropolis sampling scheme, allows a computationally fast estimate of the level density for many fermion systems in large shell model spaces. We emphasize the advantages of this Monte Carlo approach, particularly concerning t...