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Search Results: 1 - 10 of 24167 matches for " Jorge Villanueva-Solis "
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Urban Heat Island Mitigation and Urban Planning: The Case of the Mexicali, B. C. Mexico  [PDF]
Jorge Villanueva-Solis
American Journal of Climate Change (AJCC) , 2017, DOI: 10.4236/ajcc.2017.61002
Abstract: The derivations of climate change on cities and their activities depend on their capacity for adaptation and mitigation. In this sense, it has long recognized the influence of cities on their own climate, which is typically warmer than the surrounding. This phenomenon called urban heat island (UHI) has a number of impacts on air quality, water demand and energy. Since the fourth IPCC assessment report indicates the need for urban centers devoting efforts to adaptation to reduce the risks of direct and indirect impacts of climate change. The same organization recognizes the urban planning as a tool to seek such order. However, it also recognizes that the current scale of climate models cannot provide a representation of urban areas. This paper explores the intensification of the UHI, its relationship with urban expansion and its impact on housing in the city of Mexicali, B.C. Its aim is to determine its impact and mitigation potential through analysis and modeling of urban structure, expressed in use and land cover, as well as the implementation of mitigation strategies. The results show on the one hand, the convenience of using dynamic modeling as a tool applied to urban planning with a focus on mitigation and adaptation to climate change. Furthermore, regarding the implementation of strategies, the results show that most efficiency is obtained when applied generally, this is, considering green and cool roofs, cool pavements and afforestation as part of urbanization process, otherwise, only partial results are achieved. Overall, housing land use has significant potential to mitigate the UHI in the city.
Isla de Calor Urbana: Modelación Dinámica y Evaluación de medidas de Mitigación en Ciudades de Clima árido Extremo
Villanueva-Solis,Jorge; Ranfla,Arturo; Quintanilla-Montoya,Ana L;
Información tecnológica , 2013, DOI: 10.4067/S0718-07642013000100003
Abstract: the objective was to determine the potential mitigation of the urban heat island in a city sector of mexicali (baja california, méxico). the potential was determined through modeling the urban fabric; expressed in land use, land cover, and buildings as well as, the ability to implement mitigation strategies. the results show that under the current land use fabric and local climate change scenarios, the mitigation of temperature can be up to 8 °c., at 2080 year. based on the results, we conclude that dynamic modeling is a useful and an applicable tool, in the urban planning process of adaptation to climate change.
Isla de Calor Urbana: Modelación Dinámica y Evaluación de medidas de Mitigación en Ciudades de Clima árido Extremo Urban Heat Island: Dynamic Modeling and Mitigation Measures Evaluation, in Extreme arid Climate Cities
Jorge Villanueva-Solis,Arturo Ranfla,Ana L Quintanilla-Montoya
Información Tecnológica , 2013,
Abstract: El objetivo del trabajo fue determinar el potencial de mitigación de la Isla de Calor Urbana para un sector de la ciudad de Mexicali (Baja California, México). El potencial fue determinado a través del modelado de la estructura urbana, expresado en usos y cobertura del suelo, así como en edificaciones y en las posibilidades de aplicar, estrategias de mitigación. Los resultados obtenidos muestran que bajo la estructura actual de usos del suelo y escenarios de cambio climático local, la mitigación de temperatura puede llegar a ser hasta de 8°C, para el a o 2080. Con base en los resultados se concluye que ante las necesidades de adaptación al cambio climático, la modelación dinámica es una herramienta útil y aplicable al proceso de planeación urbana. The objective was to determine the potential mitigation of the Urban Heat Island in a city sector of Mexicali (Baja California, México). The potential was determined through modeling the urban fabric; expressed in land use, land cover, and buildings as well as, the ability to implement mitigation strategies. The results show that under the current land use fabric and local climate change scenarios, the mitigation of temperature can be up to 8 °C., at 2080 year. Based on the results, we conclude that dynamic modeling is a useful and an applicable tool, in the urban planning process of adaptation to climate change.
La responsabilidad médica: una cuestión de los jueces del trabajo y la seguridad social?
Jorge E. Manrique Villanueva
Revista de Derecho Privado , 2008,
A flexible routing scheme for patients with topographical disorientation
Jorge Torres-Solis, Tom Chau
Journal of NeuroEngineering and Rehabilitation , 2007, DOI: 10.1186/1743-0003-4-44
Abstract: We describe an automatic routing engine for such an ambient intelligence system. The method routes patients with topographical disorientation through indoor environments by repeatedly computing the route of minimal cost from the current location of the patient to a specified destination. The cost of a given path not only reflects the physical distance between end points, but also incorporates individual patient abilities, the presence of mobility-impeding physical barriers within a building and the dynamic nature of the indoor environment. We demonstrate the method by routing simulated patients with either topographical disorientation or physical disabilities. Additionally, we exemplify the ability to route a patient from source to destination while taking into account changes to the building interior.When compared to a random walk, the proposed routing scheme offers potential cost-savings even when the patient follows only a subset of instructions.The routing method presented reduces the navigational effort for patients with topographical disorientation in indoor environments, accounting for physical abilities of the patient, environmental barriers and dynamic building changes. The routing algorithm and database proposed could be integrated into wearable and mobile platforms within the context of an ambient intelligence solution.Topographical orientation is the ability to orient oneself within the environment and to navigate through it to specific destinations [1]. Through recent magnetic resonance imaging studies, specific structures such as the parahippocampal gyrus [2], parietal cortex [3] and temporal cortical areas [4] have been implicated as neural mechanisms for topographical orientation. It is generally agreed that in normative way-finding, humans employ a number of different way-finding strategies, including landmark recognition, route learning and map-like representations [5]. The particular choice of strategy is dependent on the individual's developmenta
A novel asynchronous access method with binary interfaces
Jorge Silva, Jorge Torres-Solis, Tom Chau, Alex Mihailidis
Journal of NeuroEngineering and Rehabilitation , 2008, DOI: 10.1186/1743-0003-5-24
Abstract: We present the mathematical development and evaluation of a novel asynchronous access method that may be used to translate sporadic activations of binary interfaces into distinct outcomes for the control of devices requiring an arbitrary number of commands to be controlled. With this method, users are required to activate their interfaces only when the device under control behaves erroneously. Then, a recursive algorithm, incorporating contextual assumptions relevant to all possible outcomes, is used to obtain an informed estimate of user intention. We evaluate this method by simulating a control task requiring a series of target commands to be tracked by a model user.When compared to a random selection, the proposed asynchronous access method offers a significant reduction in the number of interface activations required from the user.This novel access method offers a variety of advantages over traditionally synchronous access strategies and may be adapted to a wide variety of contexts, with primary relevance to applications involving direct object manipulation.Many Disabled individuals require custom interfaces that enable them to access the devices they may wish to control. When appropriately designed, such interfaces take advantage of the user's known abilities, while eliminating reliance on onerous operational requirements. Thus, the design of appropriate user interfaces for Disabled individuals involves a process of understanding the needs, challenges and abilities of each user. In order to facilitate this process, it is necessary to count on widely available and highly adaptable tools that may be customized and combined in order to obtain the most appropriate solutions in each case. One such tool is the binary interface (commonly represented as a button or a switch), which, due to its simplicity and adaptability, has become a ubiquitous resource to overcome barriers to access for Disabled people.A binary interface is formally defined as a device that may prese
Role of Chemotherapy in Advanced Gastric Cancer: Review from a Latin American Perspective  [PDF]
Marcelo Garrido, Paula Jimenez-Fonseca, Maria Pilar Solis, Alberto Carmona-Bayonas, Sebastian Mondaca, Bruno Nervi, Jorge Madrid
Journal of Cancer Therapy (JCT) , 2016, DOI: 10.4236/jct.2016.71001
Abstract: Gastric cancer (GC) is the fourth most common neoplasm and the second leading cause of cancer-related death worldwide. In Latin America (LA), the burden of this disease is higher and is the leading cause of cancer death in some countries. Chemotherapy is the standard treatment for advanced-stage GC. However, the best regimen for specific populations, such as LA, is as yet unknown. Cisplatin and fluoropyrimidine continue to be the standard of care in light of the findings of phase III studies, while docetaxel, cisplatin, and 5-fluorouracil (5-FU) are alternatives for patients with suitable overall health. Oxaliplatin or irinotecan with fluoropyrimidine can also be used in elderly patients who are not candidates for cisplatin, or have a limited performance status. This review examines studies conducted in LA. Patients from LA are under-represented in multicenter trials of chemotherapy and targeted therapies. The major challenges currently lie in implementing strategies in which patients are selected on the basis of regional, racial or molecular characteristics, to consider the molecular subtype of GC for enrolment, and in selecting patients according to prognostic factors to optimize the benefits of chemotherapy.
The Unexpected Bioenergetic Function of Neuromelanin. Implications in the Biology of Learning and Memory  [PDF]
Arturo Solis Herrera, Ruth I. Solis Arias
Natural Science (NS) , 2017, DOI: 10.4236/ns.2017.911036
Abstract: Progressive Recent Memory loss is the main complaint in Alzheimer’s disease patients. There is not a simple or congruous explanation yet due to highly complex mechanisms by which the Central Nervous System store and organize experiences every day, developed along 4 billion years of evolution; thereby learning and memory are poorly understood biological processes. The finding of the unsuspected intrinsic property of melanin to transforms light into chemical energy through water dissociation, as chlorophyll in plants; opens a new and wider horizon in the form in which the CNS generate and distribute chemical energy transporting it through molecular hydrogen produced by substantia nigra of mesencephalon and other pigmented structures. The mechanisms by which human modifies their behavior through learning and memory remain a mystery despite several decades of research. However, the?unexpected role of melanin molecule bioenergetics of first order, very above the chlorophyll and glucose, indicates?that the study of the fascinating processes involved in learning and memory several levels, needs to be started with the study of the generation and distribution of energy neuro-melanin-releasing to all the brain. In this article, we explain succinctly, the way hydrogen molecular (H2)-gas-, from the dissociation of water by the neuro melanin, moves from its source and permeates easily through the different structures of the Central Nervous System, as well as be the smaller atom, does not combine with water, moving through it in accordance with the laws of the simple diffusion. Molecular hydrogen is the main carrier of energy that nature uses in the entire universe, so that, once the neuro melanin separates it from the water, this displaces transporting its precious cargo of energy and its remarkable antioxidant capacity capable of reduce oxygen and form water.
The I550V polymorphism in the renal human sodium/dicarboxylate cotransporter 1 (hNaDC-1) gene is associated with the risk for urolithiasis in adults from Southeastern, Mexico  [PDF]
Martha Medina-Escobedo, Diana Franco-Bocanegra, Salha Villanueva-Jorge, Lizbeth González-Herrera
Open Journal of Genetics (OJGen) , 2013, DOI: 10.4236/ojgen.2013.32A3009
Abstract: Urolithiasis (UL) is an endemic disease in Southeastern, Mexico. In order to evaluate the association of I550V polymorphism in the hNaDC-1 gene with risk for hypocitraturia and/or for UL; 139 adults with UL and 132 adults without UL, were included under a case-control association study. Citrate levels in 24-h urine were quantified (citraturia). The polymorphism I550V-hNaDC-1 was determined by PCR-RFLP. Statistical analysis was performed using the STATA10.2 software. Comparison of genotype and allele frequencies between subjects with and without UL showed significant differences for genotype bb (OR = 2.34, CI: 1.19-4.59, p = 0.01) and for allele b (OR = 1.62, CI: 1.15-2.28, p = 0.005), suggesting an association with the risk for UL. Comparison of genotype and allele frequencies between subjects with hypocitraturia and subjects with normocitraturia, did not show any significant difference (p > 0.05), suggesting that this polymorphism is not associated with the risk of hypocitraturia. Interestingly, the risk for UL was increased due to an additive effect of hypocitraturia with the genotype bb (OR = 6.6, CI: 2.38-18.28, p = 0.0002) or with the allele b (OR: 4.2, CI = 2.52-6.97, p < 0.0001) in the studied population.
El secreto bancario. Aspectos históricos y problemática actual
Bartels Villanueva,Jorge; Arias Alpízar,Luz Mary;
Diálogos Revista Electrónica de Historia , 2010,
Abstract: the banking secrecy is controversial because some countries believe it permits an unfair international competition, while others believe it is a sovereign and legitimate form to insert in the global economy. both points present reasonable base, economically and politically. the debate between the academia and in the international politics is far to conclude. this paper presents some of those bases and points of view about the bank secrecy.
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