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Search Results: 1 - 10 of 9349 matches for " Silvia Cota Guajardo "
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Frequency and Clinical Epidemiology of Canine Monocytic Ehrlichiosis in Dogs Infested with Ticks from Sinaloa, Mexico
Carolina Guadalupe Sosa-Gutierrez,Maria Teresa Quintero Martinez,Soila Maribel Gaxiola Camacho,Silvia Cota Guajardo,Maria D. Esteve-Gassent,María-Guadalupe Gordillo-Pérez
Journal of Veterinary Medicine , 2013, DOI: 10.1155/2013/797019
Abstract: Ehrlichia canis is a rickettsial intracellular obligate bacterial pathogen and agent of canine monocytic ehrlichiosis. The prevalence of this disease in veterinary medicine can vary depending on the diagnostic method used and the geographic location. One hundred and fifty-two canine blood samples from six veterinary clinics and two shelters from Sinaloa State (Mexico) were analyzed in this study. All animals were suspected of having Canine Monocytic Ehrlichiosis (CME). The diagnostic methods used were the ELISA (Snap4Dx, IDEXX) together with blood smear and platelet count. From all dogs blood samples analyzed, 74.3% were positive to E. canis by ELISA and 40.1% were positive by blood smear. The sensitivity and specificity observed in the ELISA test were 78.8% and 86.7%. In addition, thrombocytopenia was presented in 87.6% of positive dogs. The predominant clinical manifestations observed were fever, anorexia, depression, lethargy, and petechiae. Consequently, this is the first report in which the morulae were visualized in the blood samples, and E. canis-specific antibodies were detected in dogs from Sinaloa, Northwest of Mexico. 1. Introduction Ehrlichia canis is the causative agent of canine monocytic ehrlichiosis (CME). Moreover, CME is an emerging disease in veterinary medicine, and E. canis has been considered in the last decade as a potential zoonotic pathogen [1, 2]. It is a worldwide disease transmitted by a tick bite. The competent vector for its transmission is the Ixodidae ticks Rhipicephalus sanguineus and Dermacentor variabilis [3]. In dogs, the CME is a multiphase disorder that progresses in three stages: acute, subclinical, and chronic. Each phase is characterized by several clinical and hematologic abnormalities. Thrombocytopenia is a common finding in E. canis infected dogs and many clinicians tend to use it as an indication for antibiotic treatment, and it is observed in 84% of the cases and its severity varies in the different disease phases [4]. During the subclinical stage a moderate thrombocytopenia is observed, while the chronic phase is characterized by severe leukopenia and anemia. In this stage dogs show other complications such as hypocellular marrow, suppressed splenic sequestration, decreased life of platelets, and an increase of circulating migration-factor platelet inhibitor [3, 4]. The relationship between the magnitude of thrombocytopenia and prevalence of E. canis has been established in countries such as Brazil in 2004 where 84.1% of infected dogs showed thrombocytopenia [3]. Taken together, more data is necessary to
Design of handoff procedures for broadband wireless access IEEE 802.16 based networks
V. Rangel–Licea,J.E. CotaGuajardo,J. Gómez–Castellanos,J. Reyes–García
Ingeniería, investigación y tecnología , 2008,
Abstract: IEEE 802.16 is a protocol for fixed broad band wire less access that is currently trying to add mobility among mobile users in the standard. However, mobility adds some technical barriers that should be solved first, this is the case of HO "handoff" (change of connection between two base stations "BS" by a mobile user). In this paper, the problem of HO in IEEE 802.16 is approached try ing to maintain the quality of service (QoS) of mobile users. A mechanism for changing connection during HO is pre sented. A simulation model based on OPNET MODELER1 was developed to evaluate the performance of the proposed HO mechanism. Finally, this paper demonstrates that it is possible to implement a seam less HO mech a nism over IEEE 802.16 even for users with de manding applications such as voice over IP.
Dise?o de procedimientos Handoff en redes inalámbricas de banda ancha basado en el protocolo IEEE 802.16
Rangel-Licea, V;Cota-Guajardo, J.E.;Gómez-Castellanos, J;Reyes-García, J;
Ingeniería, investigación y tecnología , 2008,
Abstract: abstract ieee 802.16 is a protocol for fixed broad band wire less access that is currently trying to add mobility among mobile users in the standard. however, mobility adds some technical barriers that should be solved first, this is the case of ho "handoff" (change of connection between two base stations "bs" by a mobile user). in this paper, the problem of ho in ieee 802.16 is approached try ing to maintain the quality of service (qos) of mobile users. a mechanism for changing connection during ho is pre sented. a simulation model based on opnet modeler1 was developed to evaluate the performance of the proposed ho mechanism. finally, this paper demonstrates that it is possible to implement a seam less ho mech a nism over ieee 802.16 even for users with de manding applications such as voice over ip.
Fine needle aspiration biopsy diagnosis of metastatic neoplasms of the breast. A three-case report
Raquel Garza-Guajardo,Nora Mendez-Olvera,Pablo Flores-Gutierrez,Silvia Hernandez-Martinez
CytoJournal , 2005, DOI: 10.1186/1742-6413-2-17
Abstract: Metastases to the breast are unusual lesions that make up approximately 2% of all malignant mammary neoplasms and may mimic both benign and malignant primary neoplasms from a clinical point of view, as well as in imaging studies. Arriving at a correct diagnosis is therefore essential in order to establish appropriate management. We present three cases of metastatic neoplasms diagnosed through fine needle aspiration biopsy and immunocytochemistry. The cytological diagnoses were: medulloblastoma in an 18-year-old woman, melanoma in a 26-year-old man, and an exceptional case of ovarian sarcoma originating from a granulosa cell tumor with metastases to both breasts. A metastatic disease should be considered in the differential diagnosis of a palpable mass in the breast, especially if there is a history of an extramammary malignant neoplasm. Fine needle aspiration biopsy is the method of choice for the management of these cases. Whenever possible the exam of the material obtained should be compared to the previous biopsy, which is usually enough to arrive at a correct diagnosis, thus preventing unnecessary surgical procedures.
A classical approach to smooth supermanifolds
óscar Guajardo
Mathematics , 2014,
Abstract: This is the author's Master's thesis written under the supervision of Dr. Gregor Weingart at the National Autonomous University of Mexico. The purpose of this study is to rewrite differential supergeometry in terms of classical differential geometry. This rewriting from "first principles" has two main motivations: 1 avoid using local (and usually not very well-defined) odd coordinates; 2 use both the language and the tools (both highly-developed) of classical differential geometry to state and prove results in supergeometry. Although there is work in this direction this work's point of view might be useful to translate from the sheaf-theoretic language to one that is better suited for explicit calculations.
CAMBIOS TECNOLóGICOS Y PROYECTOS ECONóMICOS EN LAS FUERZAS ARMADAS DE CHILE, 1860-1930
Guajardo Soto,Guillermo;
Historia (Santiago) , 2008, DOI: 10.4067/S0717-71942008000200003
Abstract: this article analyses the relationship between technological changes and economic projects experienced by chilean military institutions between 1860 and 1930. these changes were part of industrializing streams that emerged as a result of economic nationalism and state interventions in strategic áreas since the 1920s. however, these measures did not have an institutional consensus and were opposed by businessmen and technocrats. the article considers different aspects including the limits imposed to military institutions by civilians in terms of state control and economic management as well as the incomplete technological modernization and different views of the army and navy over weapon providers and the kind of potential war scenarios. all of these made the alliance between military, businessmen and technocrat interests to créate a military industrial facility impossible.
Conocimiento y desarrollo emocional, desde el enfoque cognitivo, procesal sistémico
Eugenio Saavedra Guajardo
Límite , 2005,
Abstract: A través de una mirada eminentemente Constructivista, se analiza el concepto de Desarrollo Personal, integrando a la discusión los cambios paradigmáticos sufridos en la actualidad, en torno a la objetividad, la realidad, el conocimiento y la nueva relación entre observador y sujeto. Utilizando como referente el Enfoque Post Racionalista Cognitivo Procesal Sistémico, de Vittorio Guidano, se revisa el papel que juega la emoción en la evolución de cada persona y se describen los principales hitos de dicho desarrollo. Finaliza el texto resaltando las principales etapas que atraviesa una persona hasta la conformación de una matriz de personalidad
La Fiscalización Superior en México: una propuesta en el contexto de la gobernanza
Guajardo-Cantú, Gerardo
GIGAPP Estudios Working Papers , 2011,
Abstract: En la presente ponencia se analizará la función de fiscalización superior en México desde la perspectiva de la autonomía que tienen dichas entidades para el ejercicio de dicha función y de las facultades sancionatorias que le otorgan las leyes en la materia. La ponencia identifica la necesidad de reformar las leyes de fiscalización en México con instrumentos que incrementen la efectividad del trabajo de las EFS y con esquemas que privilegien la participación ciudadana en dicha función. Asimismo, en este documento se expone la pertinencia de analizar esta función desde la perspectiva académica, como un medio de identificar y proponer mejoras para configurar en México una propuesta de un nuevo modelo de fiscalización superior en el contexto de la gobernanza.
CAMBIOS TECNOLóGICOS Y PROYECTOS ECONóMICOS EN LAS FUERZAS ARMADAS DE CHILE, 1860-1930
Guillermo Guajardo Soto
Historia (Santiago) , 2008,
Abstract: En el presente artículo se analizan las relaciones entre cambios tecnológicos y proyectos económicos que experimentaron los militares chilenos entre 1860 y 1930, y que conformaron algunas corrientes a favor de la industria, del nacionalismo económico y de la intervención del Estado en sectores que se consideraron como estratégicos, todo lo cual adquirió notoriedad en la década de 1920. Sin embargo, dichas corrientes no lograron consenso y fueron combatidas por los empresarios y la tecnocracia. Se explora una explicación que considera los límites impuestos a los militares por los civiles en el control del Estado y de la economía, la incompleta modernización tecnológica, las concepciones contrapuestas entre la Armada y el Ejército sobre sus proveedores de armas, además de que los posibles escenarios de guerra de Chile no serían de gran escala. Todo ello descartó una posible alianza de intereses militares, empresariales y tecnocráticos para conformar un complejo militar industrial de mayor alcance. This article analyses the relationship between technological changes and economic projects experienced by Chilean military institutions between 1860 and 1930. These changes were part of industrializing streams that emerged as a result of economic nationalism and State interventions in strategic áreas since the 1920s. However, these measures did not have an institutional consensus and were opposed by businessmen and technocrats. The article considers different aspects including the limits imposed to military institutions by civilians in terms of State control and economic management as well as the incomplete technological modernization and different views of the Army and Navy over weapon providers and the kind of potential war scenarios. All of these made the alliance between military, businessmen and technocrat interests to créate a military industrial facility impossible.
La historia de Zárate-Brazo Largo: Las dos caras del Estado argentino
Guillermo A Guajardo Soto
América Latina en la historia económica , 2012,
Abstract:
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