P Median Problem
Mostrando 1-12 de 25 artigos, teses e dissertações.
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1. Rational Use of Mechanical Circulatory Support as a Bridge to Pediatric and Congenital Heart Transplantation
Abstract Introduction: Donor shortage and organ allocation is the main problem in pediatric heart transplant. Mechanical circulatory support is known to increase waiting list survival, but it is not routinely used in pediatric programs in Latin America. Methods: All patients listed for heart transplant and supported by a mechanical circulatory support betw
Braz. J. Cardiovasc. Surg.. Publicado em: 2018-06
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2. Is serum angiotensin converting enzyme level a useful non-invasive marker for liver fibrosis in patients with chronic hepatitis C?
Summary Objective: Chronic hepatitis C (CHC) continues to be a critical problem. The liver fibrosis score is the most valuable tool in determining treatment and prognosis. Liver biopsy is still considered a gold method but, due to unmet needs, new non-invasive markers are required. The aim of this study was to investigate any possible relationship between s
Rev. Assoc. Med. Bras.. Publicado em: 2018-03
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3. Endoscopic Ultrasonography in the Diagnosis and Treatment Strategy Choice of Esophageal Leiomyoma
OBJECTIVES: Esophageal leiomyoma is the most common benign tumor of the esophagus, and it originates from mesenchymal tissue. This study analyzed the clinicopathological characteristics of esophageal leiomyoma and aimed to evaluate the role of endoscopic ultrasonography in the diagnosis and treatment selection for these lesions. METHODS: Two hundred and tw
Clinics. Publicado em: 2017-04
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4. Use and outcomes of amplatz renal dilator for treatment of urethral strictures
ABSTRACT Introduction Urethral stricture disease is still a major problem in men. Many procedures are available for the treatment of urethral strictures; urethral dilatation is one of the oldest. The blind dilatation of urethral strictures may be a difficult and potentially dangerous procedure. The purpose of this study was to describe safe urethral dilatat
Int. braz j urol.. Publicado em: 2016-04
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5. LOCATING PUBLIC SCHOOLS IN FAST EXPANDING AREAS: APPLICATION OF THE CAPACITATED p-MEDIAN AND MAXIMAL COVERING LOCATION MODELS
The area of Guaratiba, in Rio de Janeiro, presents extraordinary population growth rates that exceed all other districts of the city. Moreover, the public investments underway, in view of the 2106 Olympic Games, are making the region even more attractive. Therefore, it is appropriate to suggest proactive measures to avoid the predicted collapse of several pu
Pesqui. Oper.. Publicado em: 2014-08
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6. Delayed Ureterectomy after Incomplete Nephroureterectomy for Upper Tract Urothelial Carcinoma: Pathologic Findings and Outcomes
Objectives To evaluate the pathologic findings and outcomes after distal ureterectomy for a retained ureteral segment following incomplete nephroureterectomy for urothelial carcinoma of the renal pelvis or ureter. Materials and Methods After IRB approval, an institutional database identified patients who underwent distal ureterectomy for a retained ureter
Int. braz j urol.. Publicado em: 2013-12
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7. The air transportation hub-and-spoke design problem: comparison between a continuous and a discrete solution method
The hub-and-spoke network design problem, also known as the hub location problem, aims to find the concentration points in a given network flow so that the sum of the distances of the linkages is minimized. In this work, we compare discrete solutions of this problem, given by the branch-and-cut method applied to the p-hub median model, with continuous soluti
Pesqui. Oper.. Publicado em: 25/10/2013
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8. Dança das cadeiras: usando geoinformação na resolução do problema de vagas nas pré-escolas públicas da cidade de São Paulo / Musical chairs: using geo-information in solving the problem of vacancies in public preschools in São Paulo
Em breve a Educação Básica (dos 4 aos 17 anos) se tornará obrigatória, quando será conhecida a demanda real de vagas na pré-escola. Com vistas a resolver o problema da acomodação desta demanda, este trabalho visa desenvolver um framework que subsidie a busca por locais adequados para construção de novas escolas ou reformas das já existentes de mo
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/07/2011
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9. HIBRIDIZAÇÃO DE MÉTODOS EXATOS E HEURÍSTICOS PARA RESOLUÇÃO DE PROBLEMAS DE OTIMIZAÇÃO COMBINA / HYBRIDIZATION OF EXACT AND HEURISTIC METHODS TO SOLVE COMBINATORIAL OPTIMIZATION PROBLEM
A recente evolução dos computadores como também dos métodos exatos oriundos da programação matemática, muitos destes eficientemente implementados em otimizadores comerciais, propiciou o surgimento de novos algoritmos, denominados metaheurísticas híbridas, que têm sido aplicados para resolução de problemas combinatoriais. Este trabalho apresenta a
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 04/03/2011
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10. Valores de ferritina sérica em beta talassemia heterozigota
A low iron level, the commonest nutritional deficiency in the world, is a public health problem in developing countries. On the other hand, an excessive amount of iron is toxic, causing several organic dysfunctions, such as diabetes, cirrhosis, endocrinopathies and heart disease. Researchers have reported an association of iron overload with beta-thalassemia
Revista Brasileira de Hematologia e Hemoterapia. Publicado em: 2010
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11. Multimodal therapy for painful bladder syndrome / interstitial cystitis: pilot study combining behavioral, pharmacologic, and endoscopic therapies
Purpose: We evaluated the effectiveness of combining behavioral therapy, pharmacologic therapy and endoscopic hydrodistension for treating painful bladder syndrome / interstitial cystitis (PBS/IC). Materials and Methods: Twenty-five patients with PBS/IC were prospectively enrolled in a pilot multimodal behavioral, pharmacologic and endoscopic treatment proto
International braz j urol. Publicado em: 2009-08
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12. ALGORITMOS PRIMAIS E DUAIS PARA O PROBLEMA DAS P-MEDIANAS / PRIMAL AND DUAL ALGORITHMS FOR THE UNCAPACITED P-MEDIAN PROBLEM
A facility is any center that offers services to a set of clients. It may be, among others, a school, a factory or a depot. Facility location problems are combinatorial optimization problems that handle decisionmaking in respect to the positioning of those services, optimizing some defined criteria. The measures often used to assess the quality of a solution
Publicado em: 2009