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Confiabilidad y rendimiento adaptativo de un almacenamiento en la multi nube con redes neuronales

Reliability and Adaptive performance of multi-cloud storage with neural networks

Israel Rescalvo Anastacio (2021)

El uso de los servicios en la nube se ha incrementado en los últimos años por lo que usuarios, industrias y gobiernos depositan grandes conjuntos de datos en la infraestructura de los proveedores de servicios (CSP, por sus siglas en inglés). No obstante, algunos servicios como el almacenamiento como servicio involucran severos riesgos de accesibilidad, integridad y privacidad de datos. Una solución a dichos inconvenientes está dada por el uso de múltiples CSPs, evitando así que un único CSP cuente con acceso total a la información confidencial. En este trabajo de tesis, se propone el análisis, diseño e implementación de una red apuntadora para configurar un sistema redundante de números residuales con aproximación de rango (AR-RRNS, por sus siglas en inglés) que permite distribuir la información en 𝑛 CSPs y recuperar la misma solo con 𝑘 de ellos. La red neuronal propuesta busca minimizar la probabilidad de pérdida de información y redundancia, ambos objetivos están en conflicto y es fundamental determinar una adecuada configuración de (𝑘, 𝑛) donde 2 ≤ 𝑘 ≤ 𝑛. Asimismo, la red permite seleccionar CSPs específicos y asignarles un segmento del total de la información. La red apuntadora utiliza un modelo codificador decodificador y un sistema de atención entrenados mediante aprendizaje por refuerzo. Esta estructura le permite a la red afrontar cambios en los parámetros de los CSPs como la probabilidad de error. Además, la mayoría de los cálculos se realizan de manera offline. A partir de los resultados, se llevó a cabo un análisis comparativo con diversas versiones de algoritmos genéticos y el algoritmo de ramificación y poda, todos ellos forman parte fundamental del estado del arte en la optimización. El análisis muestra que la red apuntadora es más eficiente en tiempo que los demás algoritmos y genera soluciones similares en calidad al algoritmo genético simple pero la diversidad es menor con respecto a los algoritmos basado en población.

The use of cloud services has increased in recent years as users, industries and governments deposit large data sets in the infrastructure of service providers (CSP). However, some services such as storage as a service involve severe data accessibility, integrity and privacy risks. A solution to these drawbacks is given by the use of multiple CSPs, thus preventing a single CSP from having full access to confidential information. In this thesis work, the analysis, design and implementation of a pointing network is proposed to configure a redundant system of residual numbers with range approximation (AR-RRNS) that allows to distribute the information in 𝑛 CSPs and recover the same only with 𝑘 of them. The proposed neural network seeks to minimize the probability of information loss and redundancy, both objectives are in conflict and it is essential to determine an adequate configuration of 2 ≤ 𝑘 ≤ 𝑛. Likewise, the network allows selecting specific CSPs and assigning them a segment of the total information. The pointer network uses an encoder-decoder model and attention system trained by reinforcement learning. This structure allows the network to face changes in the parameters of the CSPs such as the probability of error. Also, most of the calculations are done offline. Based on the results, a comparative analysis was carried out with different versions of genetic algorithms and the branching and bound algorithm, all of which are a fundamental part of the state of the art in optimization. The analysis shows that the pointing network is more efficient in time than the other algorithms and generates solutions similar in quality to the simple genetic algorithm, but the diversity is lower with respect to population-based algorithms.

Master thesis

almacenamiento en la nube, optimización multi objetivo, Sistema Numérico de Residuo, seguridad, esquemas de compartición de secretos Multi-objective optimization, cloud storage, Residue Number System, security, Secret Sharing Schemes INGENIERÍA Y TECNOLOGÍA CIENCIAS TECNOLÓGICAS TECNOLOGÍA DE LOS ORDENADORES FIABILIDAD DE LOS ORDENADORES FIABILIDAD DE LOS ORDENADORES

Gender differences in torture actions of the Mexican Navy (2006-2018)

Abraham Sánchez Rogaciano González (2021)

This article presents an analysis of gender differences in cases of torture attributed to the Mexican Navy. Our objective is to demonstrate that gender is related to the intensity and type of mistreatment in the victims. We analyze  the information of the recommendations issued by the National Commission of Human Rights issued in the Secretariat of the Navy in the period of 2006-2018. The results indicate that gender is independent in torture methods such as beatings, responses, suffocation and electrification. But the variable gender is dependent when using methods of forced nudity, sexual violence and rape. Additionally, the intensity of torture among woman victims is greater than that of men.

Article

Artículo

torture gender differences human rights Mexican Navy tortura diferencias de género derechos humanos Secretaría de Marina CIENCIAS SOCIALES CIENCIAS SOCIALES

Replicative and integrative plasmids for production of human interferon gamma in Bacillus subtilis

JUAN ANTONIO ROJAS CONTRERAS MARIO PEDRAZA REYES LEANDRO GABRIEL ORDOÑEZ ACEVEDO NORMA URTIZ ESTRADA Ana Paulina Barba de la Rosa Antonio de León Rodríguez (2010)

"Integrative and replicative plasmids for the expression driven by the P43 promoter and secretion of recombinant proteins in Bacillus subtilis were constructed. The plasmids named pInt and pRep respectively were tested for the production of recombinant human interferon gamma (rhIFN-γ). A synthetic hIFN-γ gene employing the optimized B. subtilis codon usage was fused with the Bacillus licheniformis α-amylase signal peptide (sp-amyL) encoding sequence. The integrative construct produced 2.5 ± 0.2 mg l−1 and the replicative system produced 20.3 ± 0.8 mg l−1 of total recombinant rhIFN-γ. The results showed that secretion of hIFN-γ was the bottleneck for the overexpression of mature rhIFN-γ by B. subtilis."

Article

Heterologous Integrative Probiotic Therapeutic Recombinant Replicative plasmid and secretion BIOLOGÍA Y QUÍMICA CIENCIAS DE LA VIDA MICROBIOLOGÍA MICROBIOLOGÍA

Senescence associated secretory phenotype profile from primary lung mice fibroblasts depends on the senescence induction stimuli

LUIS ANGEL MACIEL BARON SANDRA LIZBETH MORALES ROSALES ANGELICA ALEJANDRA AQUINO CRUZ FRANCISCO TRIANA MARTINEZ SONIA GALVAN ARZATE ARMANDO LUNA LOPEZ VIRIDIANA YAZMIN GONZALEZ PUERTOS NORMA EDITH LOPEZ DIAZ GUERRERO Claudio Torres MINA KONIGSBERG FAINSTEIN (2016)

Cellular senescence is a multifactorial phenomenon of growth arrest and distorted function, which has been recognized as an important feature during tumor suppression mechanisms and a contributor to aging. Senescent cells have an altered secretion pattern called Senescence-Associated Secretory Phenotype (SASP) that comprises a complex mix of factors including cytokines, growth factors, chemokines, and matrix metalloproteinases. SASP has been related with local inflammation that leads to cellular transformation and neurodegenerative diseases. Various pathways for senescence induction have been proposed; the most studied is replicative senescence due to telomere attrition called replicative senescence (RS). However, senescence can be prematurely achieved when cells are exposed to diverse stimuli such as oxidative stress (stress-induced premature senescence, SIPS) or proteasome inhibition (proteasome inhibition-induced premature senescence, PIIPS). SASP has been characterized in RS and SIPS but not in PIIPS. Hence, our aim was to determine SASP components in primary lung fibroblasts obtained from CD-1 mice induced to senescence by PIIPS and compare them to RS and SIPS. Our results showed important variations in the 62 cytokines analyzed, while SIPS and RS showed an increase in the secretion of most cytokines, and in PIIPS only 13 were incremented. Variations in glutathione-redox balance were also observed in SIPS and RS, and not in PIIPS. All senescence types SASP displayed a pro-inflammatory profile and increased proliferation in L929 mice fibroblasts exposed to SASP. However, the behavior observed was not exactly the same, suggesting that the senescence induction pathway might encompass dissimilar responses in adjacent cells and promote different outcomes.

Article

BIOLOGÍA Y QUÍMICA Biología celular Envejecimiento Aging Senectud Senescence Senescence-Associated Secretory Phenotype (SASP) Fenotipo secretor asociado a la senescencia Estrés oxidativo Oxidative stress