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https://www.readbyqxmd.com/read/28103566/exact-and-approximate-stability-of-solutions-to-traveling-salesman-problems
#1
Moritz Niendorf, Anouck R Girard
This paper presents the stability analysis of an optimal tour for the symmetric traveling salesman problem (TSP) by obtaining stability regions. The stability region of an optimal tour is the set of all cost changes for which that solution remains optimal and can be understood as the margin of optimality for a solution with respect to perturbations in the problem data. It is known that it is not possible to test in polynomial time whether an optimal tour remains optimal after the cost of an arbitrary set of edges changes...
January 17, 2017: IEEE Transactions on Cybernetics
https://www.readbyqxmd.com/read/28103565/a-scan-line-forest-growing-based-hand-segmentation-framework-with-multipriority-vertex-stereo-matching-for-wearable-devices
#2
Yiyi Ren, Xiang Xie, Guolin Li, Zhihua Wang
A hand segmentation framework is proposed for 3-D hand gesture interaction for wearable devices. In this framework, all the objects in a scene are regarded as directed trees in a forest, and the problem of the hand segmentation can be converted into finding the target tree (called hand tree) in the forest with proper hand properties including color consistency, space consistency, disparity, and hand shape constraints. The forest grows scan-line by scan-line from high reliable regions to low reliable regions...
January 16, 2017: IEEE Transactions on Cybernetics
https://www.readbyqxmd.com/read/28103550/estimating-the-accuracy-level-among-individual-detections-in-clustered-microcalcifications
#3
Maria Sainz de Cea, Robert Nishikawa, Yongyi Yang
Computerized detection of clustered microcalcifica tions (MCs) in mammograms often suffers from the occurrence of false positives (FPs), which can vary greatly from case to case. We investigate how to apply statistical estimation to determine the number of FPs that are present in a detected MC lesion. First, we describe the number of true positives (TPs) by a Poisson-Binomial probability distribution, wherein a logistic regression model is trained to determine the probability for an individual detected MC to be a TP based on its detector output...
January 17, 2017: IEEE Transactions on Medical Imaging
https://www.readbyqxmd.com/read/28103501/congenital-embryonal-rhabdomyosarcoma-multiple-lesions
#4
Heidarali Esmaeili, Mahzad Azimpouran
INTRODUCTION: Congenital or neonatal rhabdomyosarcoma (RMS) is a rare soft tissue tumor with the most common sites of origin in genitourinary tract, head, and neck regions and extremities are less commonly involved. PRESENTATION OF CASE: In this paper, a case of embryonal RMS with skin lesions, lymph nodes metastasis, and bone marrow metastasis is reported for a 1-month old female patient. DISCUSSION: This study presents how within 8-months of chemotherapy, the lesions got subsided and the patient became disease free...
January 5, 2017: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/28103469/transitions-of-postural-coordination-as-a-function-of-frequency-of-the-moving-support-platform
#5
Aviroop Dutt-Mazumder, Karl Newell
This study was set-up to investigate the multi-segmental organization of human postural control in a dynamic balance task. The focus was on the coupling between the center of mass (CoM) and center of pressure (CoP) as a candidate collective variable that supports maintaining balance on a sinusoidal oscillating platform in the medial-lateral (ML) plane and was continuously scaled up and then down across a frequency range from 0.2Hz to 1.2Hz. The CoM-CoP coordination changed from in-phase to anti-phase and anti-phase to in-phase at a critical frequency (∼0...
January 16, 2017: Human Movement Science
https://www.readbyqxmd.com/read/28103456/health-inequalities-in-diabetes-mellitus-and-hypertension-a-parish-level-study-in-the-northern-region-of-portugal
#6
Teresa Leao, Julian Perelman, Manuela Felício, Vasco Machado, Graça Lima
INTRODUCTION: Diabetes and hypertension are highly prevalent conditions in Portugal. Little is known about the geographical and social patterning of these diseases, which precludes the design of targeted health policies. This study aimed to measure the geographical and socioeconomic distribution of type 2 diabetes and hypertension prevalence in the population resident in the Northern region of Portugal, for the year 2013. MATERIAL AND METHODS: An ecological correlation study analyzed the 2,028 parishes of the region...
October 2016: Acta Médica Portuguesa
https://www.readbyqxmd.com/read/28103448/bedside-contribution-of-electrical-impedance-tomography-to-set-positive-end-expiratory-pressure-for-ecmo-treated-severe-ards-patients
#7
Guillaume Franchineau, Nicolas Bréchot, Guillaume Lebreton, Guillaume Hekimian, Ania Nieszkowska, Jean-Louis Trouillet, Pascal Leprince, Jean Chastre, Charles-Edouard Luyt, Alain Combes, Matthieu Schmidt
RATIONALE: Optimal positive end-expiratory pressure (PEEP) is unknown in severe acute respiratory distress syndrome (ARDS) patients on extracorporeal membrane oxygenation (ECMO) receiving mechanical ventilation with very low tidal volume. OBJECTIVES: To evaluate electrical impedance tomography's (EIT) ability to monitor a PEEP trial and to derive from EIT the best compromise PEEP in this setting. METHODS: A decremental PEEP trial (20-0 cmH2O) in 5 cmH2O steps was monitored by EIT, with lung images divided into four ventral-to-dorsal horizontal regions of interest...
January 19, 2017: American Journal of Respiratory and Critical Care Medicine
https://www.readbyqxmd.com/read/28103408/functional-planning-units-for-the-management-of-an-endangered-brazilian-titi-monkey
#8
Sidney F Gouveia, João Pedro Souza-Alves, Bruno B de Souza, Raone Beltrão-Mendes, Leandro Jerusalinsky, Stephen F Ferrari
Conservation practices in the tropics often rely on the data available for a few, better-known species and the adoption of an appropriate spatial scale. By defining a set of landscape units that account for critical aspects of the focal species, the information available on these conservation targets can support regional conservation policies. Here, we define and classify adjacent landscapes, termed planning units, to orientate management decisions within and among these landscapes, which are occupied by an endangered flagship primate species (Coimbra-Filho's titi monkey, Callicebus coimbrai) from eastern Brazil...
January 19, 2017: American Journal of Primatology
https://www.readbyqxmd.com/read/28103394/measuring-patient-engagement-which-health-care-engagement-behaviors-are-important-to-patients
#9
Huey-Ming Tzeng, James Marcus Pierson
AIM(S): This study identified patient health care engagement behaviors that are important to community-dwelling adult patients living in the southern region of the USA. BACKGROUND: Patient engagement has been identified as a key driver for containing health care costs, but the public and health care professionals lack a scientific understanding of patient engagement. A valid tool is needed for prompting patients to discuss health activities with their health care providers and to obtain support...
January 19, 2017: Journal of Advanced Nursing
https://www.readbyqxmd.com/read/28103374/arg399gln-polymorphism-of-the-xrcc1-gene-is-associated-with-coronary-artery-disease-in-a-turkish-population
#10
N Özbilüm, S Arslan, M Yanartaş, Z Yılmaz, Ö Berkan
Objective: Coroner artery disease, the leading cause of morbidity and mortality worldwide, is an inflammatory disease. XRCC1 gene is playing the role of scaffolding protein for the base excision repair (BER) and single strand break (SSB) repair. Methods: The study population consisted of 402 participants living in the same region, classified into case group (n=201) and control group (n=201). Phenol-chloroform method was used to extract DNA from blood samples of the study participants...
March 17, 2016: West Indian Medical Journal
https://www.readbyqxmd.com/read/28103335/construction-of-a-low-cost-homemade-laparoscopic-simulator-for-use-in-a-caribbean-setting
#11
S Persaud, I Hosein, D Dan, P S Griffith
Introduction: To the modern surgeon in training, the acquisition of laparoscopic skills is essential. Laparoscopic simulators are effective but in the often resource poor setting of the Caribbean, the cost of these simulators is often prohibitive. We describe the construction of a simulator which is cheap, easy to assemble and effective. It is also relatively easy to mass produce for use in training programmes across the region. Materials and methods: The simulator is constructed using a semi-transparent plastic box...
June 13, 2016: West Indian Medical Journal
https://www.readbyqxmd.com/read/28103321/derivative-of-extremophilic-50s-ribosomal-protein-l35ae-as-an-alternative-protein-scaffold
#12
Anna V Lomonosova, Andrei B Ulitin, Alexei S Kazakov, Tajib A Mirzabekov, Eugene A Permyakov, Sergei E Permyakov
Small antibody mimetics, or alternative binding proteins (ABPs), extend and complement antibody functionality with numerous applications in research, diagnostics and therapeutics. Given the superiority of ABPs, the last two decades have witnessed development of dozens of alternative protein scaffolds (APSs) for the design of ABPs. Proteins from extremophiles with their high structural stability are especially favorable for APS design. Here, a 10X mutant of the 50S ribosomal protein L35Ae from hyperthermophilic archaea Pyrococcus horikoshii has been probed as an APS...
2017: PloS One
https://www.readbyqxmd.com/read/28103313/mycobacterium-marinum-degrades-both-triacylglycerols-and-phospholipids-from-its-dictyostelium-host-to-synthesise-its-own-triacylglycerols-and-generate-lipid-inclusions
#13
Caroline Barisch, Thierry Soldati
During a tuberculosis infection and inside lipid-laden foamy macrophages, fatty acids (FAs) and sterols are the major energy and carbon source for Mycobacterium tuberculosis. Mycobacteria can be found both inside a vacuole and the cytosol, but how this impacts their access to lipids is not well appreciated. Lipid droplets (LDs) store FAs in form of triacylglycerols (TAGs) and are energy reservoirs of prokaryotes and eukaryotes. Using the Dictyostelium discoideum/Mycobacterium marinum infection model we showed that M...
January 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28103310/epidemiological-and-molecular-characterization-of-a-mexican-population-isolate-with-high-prevalence-of-limb-girdle-muscular-dystrophy-type-2a-due-to-a-novel-calpain-3-mutation
#14
Carlos A Pantoja-Melendez, Antonio Miranda-Duarte, Bladimir Roque-Ramirez, Juan C Zenteno
Limb-Girdle Muscular Dystrophy type 2 (LGMD2) is a group of autosomally recessive inherited disorders defined by weakness and wasting of the shoulder and pelvic girdle muscles. In the past, several population isolates with high incidence of LGMD2 arising from founder mutation effects have been identified. The aim of this work is to describe the results of clinical, epidemiologic, and molecular studies performed in a Mexican village segregating numerous cases of LGMD2. A population census was conducted in the village to identify all LGMD affected patients...
2017: PloS One
https://www.readbyqxmd.com/read/28103307/plant-family-specific-impacts-of-petroleum-pollution-on-biodiversity-and-leaf-chlorophyll-content-in-the-amazon-rainforest-of-ecuador
#15
Paul Arellano, Kevin Tansey, Heiko Balzter, Markus Tellkamp
In recent decades petroleum pollution in the tropical rainforest has caused significant environmental damage in vast areas of the Amazon region. At present the extent of this damage is not entirely clear. Little is known about the specific impacts of petroleum pollution on tropical vegetation. In a field expedition to the Ecuadorian Amazon over 1100 leaf samples were collected from tropical trees in polluted and unpolluted sites. Plant families were identified for 739 of the leaf samples and compared between sites...
2017: PloS One
https://www.readbyqxmd.com/read/28103272/prevalence-and-determinants-of-oral-human-papillomavirus-infection-in-500-young-adults-from-italy
#16
Valentina Lupato, Dana Holzinger, Daniela Höfler, Anna Menegaldo, Paolo Giorgi Rossi, Annarosa Del Mistro, Maria Cristina Da Mosto, Michael Pawlita, Paolo Boscolo-Rizzo
Although the prevalence of human papillomavirus (HPV)-related oropharyngeal squamous cell carcinoma (OPSCC) is increasing in developed countries and becoming a relevant health issue, the natural history of oral HPV infection is still unclear. Estimating the infection's prevalence in specific populations and identifying risk factors can widen our understanding of its natural history and help to delineate appropriate prevention strategies. This study sought to (i) determine oral HPV prevalence and genotype distribution in a large series of young Italian adults, (ii) validate an oral rinse sampling/storage protocol, and (iii) pinpoint factors associated with oral HPV infection...
2017: PloS One
https://www.readbyqxmd.com/read/28103269/wildlife-population-dynamics-in-human-dominated-landscapes-under-community-based-conservation-the-example-of-nakuru-wildlife-conservancy-kenya
#17
Joseph O Ogutu, Bernard Kuloba, Hans-Peter Piepho, Erustus Kanga
Wildlife conservation is facing numerous and mounting challenges on private and communal lands in Africa, including in Kenya. We analyze the population dynamics of 44 common wildlife species in relation to rainfall variation in the Nakuru Wildlife Conservancy (NWC), located in the Nakuru-Naivasha region of Kenya, based on ground total counts carried out twice each year from March 1996 to May 2015. Rainfall in the region was quasi-periodic with cycle periods dependent on the rainfall component and varying from 2...
2017: PloS One
https://www.readbyqxmd.com/read/28103258/revisiting-greek-propolis-chromatographic-analysis-and-antioxidant-activity-study
#18
Konstantinos M Kasiotis, Pelagia Anastasiadou, Antonis Papadopoulos, Kyriaki Machera
Propolis is a bee product that has been extensively used in alternative medicine and recently has gained interest on a global scale as an essential ingredient of healthy foods and cosmetics. Propolis is also considered to improve human health and to prevent diseases such as inflammation, heart disease, diabetes and even cancer. However, the claimed effects are anticipated to be correlated to its chemical composition. Since propolis is a natural product, its composition is consequently expected to be variable depending on the local flora alignment...
2017: PloS One
https://www.readbyqxmd.com/read/28103253/polymorphisms-in-htr2a-and-drd4-predispose-to-smoking-and-smoking-quantity
#19
Gloria Pérez-Rubio, Alejandra Ramírez-Venegas, Valeri Noé Díaz, Leonor García Gómez, Karina Elvira Fabián, Salvador García Carmona, Luis A López-Flores, Enrique Ambrocio-Ortiz, Rocío Contreras Romero, Noé Alcantar-Ayala, Raúl H Sansores, Ramcés Falfán-Valencia
BACKGROUND: Genes encoding the receptors involved in the dopaminergic and serotonergic pathways are potential candidates in the mechanisms of nicotine addiction. AIMS: To identify genetic variants in the promoter regions and exons of the DRD4 and HTR2A genes associated with tobacco smoking and the degree of nicotine addiction in Mexican mestizos. METHODS: The study included 438 non-smokers (NS) and 1,157 current smokers, ranked based on their consumption of cigarettes per day (cpd): 574 heavy smokers (HS, >20 cpd) and 583 light smokers (LS, 1-10 cpd)...
2017: PloS One
https://www.readbyqxmd.com/read/28103243/the-socioeconomic-benefit-to-individuals-of-achieving-the-2020-targets-for-five-preventive-chemotherapy-neglected-tropical-diseases
#20
William K Redekop, Edeltraud J Lenk, Marianne Luyendijk, Christopher Fitzpatrick, Louis Niessen, Wilma A Stolk, Fabrizio Tediosi, Adriana J Rijnsburger, Roel Bakker, Jan A C Hontelez, Jan H Richardus, Julie Jacobson, Sake J de Vlas, Johan L Severens
BACKGROUND: Lymphatic filariasis (LF), onchocerciasis, schistosomiasis, soil-transmitted helminths (STH) and trachoma represent the five most prevalent neglected tropical diseases (NTDs). They can be controlled or eliminated by means of safe and cost-effective interventions delivered through programs of Mass Drug Administration (MDA)-also named Preventive Chemotherapy (PCT). The WHO defined targets for NTD control/elimination by 2020, reinforced by the 2012 London Declaration, which, if achieved, would result in dramatic health gains...
January 19, 2017: PLoS Neglected Tropical Diseases
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