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Search Results: 1 - 10 of 235911 matches for " Maria E. Mayorga "
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Simulated Estimates of Pre-Pregnancy and Gestational Diabetes Mellitus in the US: 1980 to 2008
Maria E. Mayorga, Odette S. Reifsnider, David M. Neyens, Mulugeta G. Gebregziabher, Kelly J. Hunt
PLOS ONE , 2013, DOI: 10.1371/journal.pone.0073437
Abstract: Purpose To simulate national estimates of prepregnancy and gestational diabetes mellitus (GDM) in non-Hispanic white (NHW) and non-Hispanic black (NHB) women. Methods Prepregnancy diabetes and GDM were estimated as a function of age, race/ethnicity, and body mass index (BMI) using South Carolina live singleton births from 2004–2008. Diabetes risk was applied to a simulated population. Age, natality and BMI were assigned to women according to race- and age-specific US Census, Natality and National Health and Nutrition Examination Surveys (NHANES) data, respectively. Results From 1980–2008, estimated GDM prevalence increased from 4.11% to 6.80% [2.68% (95% CI 2.58%–2.78%)] and from 3.96% to 6.43% [2.47% (95% CI 2.39%–2.55%)] in NHW and NHB women, respectively. In NHW women prepregnancy diabetes prevalence increased 0.90% (95% CI 0.85%–0.95%) from 0.95% in 1980 to 1.85% in 2008. In NHB women from 1980 through 2008 estimated prepregnancy diabetes prevalence increased 1.51% (95% CI 1.44%–1.57%), from 1.66% to 3.16%. Conclusions Racial disparities in diabetes prevalence during pregnancy appear to stem from a higher prevalence of prepregnancy diabetes, but not GDM, in NHB than NHW.
Embolismo paradójico inminente evidenciado por ecocardiografía en pacientes con foramen ovale persistente
Mayorga,Luis E; Clavijo,Claudia;
Revista Colombiana de Cardiología , 2008,
Abstract: a 72 years old male patient with previous history of pulmonary thrombosis was admitted with an ischemic stroke. in a transtoraxic echocardiogram, as well as in a posterior transesophagic one, a mobile mass suggesting a thrombus going through a patent foramen ovale, was found. facing an imminent paradoxical embolism, surgical thrombectomy was considered that could no be realized due to infection. anticoagulation with low molecular weight heparin was initiated. a control echocardiogram showed complete disappearance of the mass. the patient was discharged with oral anticoagulation.
Embolismo paradójico inminente evidenciado por ecocardiografía en pacientes con foramen ovale persistente Imminent paradoxical embolism evidenced by echocardiography in patients with patent foramen ovale
Luis E Mayorga,Claudia Clavijo
Revista Colombiana de Cardiología , 2008,
Abstract: Paciente de género masculino, de 72 a os de edad, con antecedente de trombo-embolismo pulmonar, quien ingresó por evento cerebro-vascular isquémico y en quien en el ecocardiograma trans-torácico y luego en el trans-esofágico, se encontró una masa móvil que sugería un trombo que traspasaba el foramen ovale permeable. Ante el diagnóstico de embolismo paradójico inminente, se consideró realizar trombectomía quirúrgica, la cual se difirió por infección y se inició anticoagulación con heparina de bajo peso molecular. Se realizó un ecocardiograma de control y se observó que la masa había desaparecido por completo. Se dio de alta con anticoagulación oral. A 72 years old male patient with previous history of pulmonary thrombosis was admitted with an ischemic stroke. In a transtoraxic echocardiogram, as well as in a posterior transesophagic one, a mobile mass suggesting a thrombus going through a patent foramen ovale, was found. Facing an imminent paradoxical embolism, surgical thrombectomy was considered that could no be realized due to infection. Anticoagulation with low molecular weight heparin was initiated. A control echocardiogram showed complete disappearance of the mass. The patient was discharged with oral anticoagulation.
Centro Internacional de Bogotá
Maria Pía Fontana,Miguel Mayorga
DEARQ : Journal of Architecture , 2008,
Território, coopera??o e inova??o: um estudo sobre o Arranjo Produtivo Pingo D?água
Teixeira, Keuler Hissa;Amaral Filho, Jair do;Mayorga, Ruben Dario;Mayorga, Maria Irles de Oliveira;
Revista de Economia e Sociologia Rural , 2006, DOI: 10.1590/S0103-20032006000300010
Abstract: several states and brazilian countries already have adopted investment programs to the local productive arrangements (lpa?s) that involves by micro, small and median companies. however, most of the studies on lpa?s has given little attention to the local productive arrangements of agricultural nature. this study intends to analyze the lpa, of irrigated agriculture, called "drop of water" in quixeramobim, ceará. it was used primary and secondary data that were obtained through bibliographical and documental researches, case study and field researches. the resulted were verified through of tabular and descriptive analyze. inside the arrangement analyzed we could verify the involvement of several partners? from different segments that participated in higher or lower degree. this involvement of several partners? establishing important instruments for introduction of innovations of product, process and organizational creating new competences and gains competitive advantages. however, it was verified the existence of obstacles related to the inexistence of inappropriate training centers for qualification of the producers, absence of research laboratories and lack of more appropriate credit lines adjusted producer?s reality. in spite of these problems, we can conclude that there was gain of resulted from the collective efficiency that was created by this productive gathering. this arrangement is a proof that with some social organization of the local actor?s will be possible to change the difficult reality of the families that earn from their income agriculture in the zone semi-arid of the ceará.
Energy-Efficient Methods for Highly Correlated Spatio-Temporal Environments in Wireless Sensor Network Communications  [PDF]
Mohammad Abdul Azim, Zeyar Aung, Sofiane Moad, Nizar Bouabdallah, Mario E. Rivero-Angeles, Israel Leyva-Mayorga
Wireless Sensor Network (WSN) , 2014, DOI: 10.4236/wsn.2014.65009
Abstract: Continuous-monitoring (CM) of natural phenomenon is one of the major streams of applications in wireless sensor networks (WSNs), where aggregation and clustering techniques are beneficial as correlation dominates in both spatial and temporal aspects of sensed phenomenon. Conversely, in Event Driven Reporting (EDR), the efficient transmission of sensitive data related to some predefined alarm cases is of major importance. As such, reporting latency is a more important performance parameter. However, in some applications, the transmission of both CM and EDR data is encouraged or even required. For either CM or EDR applications, system performance can be greatly improved when both the number of packets to be transmitted as well as the packet size is reduced. This is especially true for highly dense sensor networks where many nodes detect the same values for the sensed phenomenon. Building on this, this paper focuses on studying and proposing compression techniques to improve the system performance in terms of energy consumption and reporting latency in both CM and EDR applications. Furthermore, we extend our analysis to hybrid networks where CM and EDR are required simultaneously. Specifically, this paper presents a simple aggregation technique named smart aggregation (SAG) for the CM applications and an event driven scheme named compression cluster scheme in spatial correlated region (CC_SCR). The proposed SAG exploits both spatial and temporal correlations where CC_SCR exploits the spatial correlation of such networks by data compression. Rationalizing the developments is attained by simulations that compare energy efficiency of the proposed SAG with k-hop aggregation and CM based event driven reporting (CMEDR) schemes. Results of CC_SCR show that the technique may reduce the energy consumption drastically. In some specific cases the reduction becomes more than 10 times compared to a classical clustering scheme. Two different strategies for the transmission of event reports through the CM infrastructure are incorporated: PER and NPER protocols. Both strategies take advantage of the cluster-based architecture which assigns a TDMA schedule for the CM data transmission while using NP/CSMA for the transmission of the event information. Consequently, no extra energy is consumed for separate event clusters. As such, the number of
An Ethical Approach to the Concept of Toleration: Understanding Tolerance as a Political Virtue  [PDF]
Ivón Cepeda Mayorga
Open Journal of Philosophy (OJPP) , 2014, DOI: 10.4236/ojpp.2014.44059
Abstract: The concept of toleration is commonly argued in political discourses and debates, when people refer to diversity and pluralism, as a form of respect and understanding. However, this does not represent an improvement at the moment of dealing with issues where a variety of values, conceptions and beliefs arises. In addition, even though when the idea of toleration was developed during Enlightenment, nowadays it seems to lead to a misconception of the term, following a connotation of a passive indifference about diversity. Due to this, the main objective of this text is to analyze the concept of toleration from an ethical perspective that allows thinking about it in terms of a political virtue needed to face the challenges of diversity inside society. In order to show this, the text presents an analysis of different conceptions of the term, in order to highlight the positive notion of toleration; after that, the text moves on, reviewing the idea of toleration from a hermeneutical perspective, as a form to reinforce the positive characteristics of the term, and path to solve the query between tolerance and intolerance. Finally, as a conclusion, it underlines that understanding the concept of toleration from an ethical perspective implies a praxis develop in daily circumstances.
Youth is wasted on the young
Marc S Penn, Martiza E Mayorga, Feng Dong
Stem Cell Research & Therapy , 2011, DOI: 10.1186/scrt65
Abstract: Following acute myocardial infarction, the human heart can lose over a billion cardiac myocytes. The injured tissue undergoes fibrosis, leading to significant loss of contractile function, adverse left ventricular remodeling and ultimately chronic heart failure. Adult mammalian cardiac myocytes are multinucleated and it has been well documented that only a limited number of cardiac myocytes enter the cell cycle following myocardial repair [1]. Scientists at the bench have known for decades that cardiac myocytes isolated from adult mammalian myocardium do not enter the cell cycle and actively divide, whereas cardiac myocytes from neonatal myocardium do have a limited capacity to divide in culture. The limited proliferative capacity of adult cardiac myocytes correlates with the limited capacity of the adult myocardium to regenerate itself following acute myocardial infarction, and is in distinct contrast to the regenerative capacity of the myocardium in lower life forms, including zebrafish [2].The recent publication by Porrello and colleagues sought to answer the question of whether the neonatal mammalian heart has the capacity for regeneration that is lost with aging [3]. To answer this question they resected the apex of the hearts of 1-day-old neonatal mice and found that the myocardium does regenerate. The regenerative process is accompanied by proliferation of cardiac myocytes that peaked at 7 days after resection. By 21 days after resection the apex of experimental animals was indistinguishable from that of sham animals, without any evidence of significant scar. Furthermore, cardiac function and chamber dimensions were similarly unchanged between experimental and sham-treated animals. In distinct contrast, apical resection in 7-day-old mice did not lead to cardiac myocyte proliferation or regeneration of the lost apical tissue. Rather, the apex in the 7-day-old mice was markedly fibrotic, suggesting that the regenerative capacity of neonatal myocardium is lost w
Réduction des approvisionnements pétroliers multiples dans les programmes linéaires de raffinage Reduction of Multiple Oil Supplies in Linear Refining Programs
Bond J.,Mayorga-Alba E.,Offant P.
Oil & Gas Science and Technology , 2006, DOI: 10.2516/ogst:1977047
Abstract: L'article propose une méthode pour réduire le nombre des pétroles bruts nécessaires pour représenter un approvisionnement lors de l'utilisation de programmes linéaires de raffinage, ceci afin de diminuer la taille et les temps de calcul de ces modèles. Les techniques utilisées sont celles de l'analyse de données multidimensionnelles. Un exemple est traité pour illustrer la méthode. The article proposes a method for reducing the number of crude ails needed to make up the supply in linear programs of refining, in order ta cut clown on the size and calculation time of such models. The method uses techniques of multidimensional data analysis. An exemple is considered in order to illustrate the method.
Hydraulic Reliability Assessment and Optimal Rehabilitation/Upgrading Schedule for Water Distribution Systems  [PDF]
Wei Peng, Rene V. Mayorga
Applied Mathematics (AM) , 2016, DOI: 10.4236/am.2016.718184
Abstract: This paper develops an innovative approach to optimize a long-term rehabilitation and upgrading schedule (RUS) for a water distribution system with considering both hydraulic failure and mechanical performance failure circumstances. The proposed approach assesses hydraulic reliability dynamically and then optimizes the long-term RUS in sequence for a water distribution system. The uncertain hydraulic parameters are treated as random numbers in a stochastic hydraulic reliability assessment. The methodologies used for optimization in a stochastic environment are: Monte Carlo Simulation, EPANET Simulation, Genetic Algorithms, Shamir and Howard’s Exponential Model, Threshold Break Rate Model and Two-Stage Optimization Model. The proposed approach is conducted on a simulation model of water distribution network in a computer by two universal codes, namely the hydraulic reliability code and the optimal RUS code. The applicability of this approach is verified in an example of a benchmark water distribution network.
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