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https://www.readbyqxmd.com/read/29332055/operating-room-scheduling-and-surgeon-assignment-problem-under-surgery-durations-uncertainty
#1
Hongwei Liu, Tianyi Zhang, Shuai Luo, Dan Xu
BACKGROUND: Scientific management methods are urgently needed to balance the demand and supply of heath care services in Chinese hospitals. Operating theatre is the bottleneck and costliest department. Therefore, the surgery scheduling is crucial to hospital management. OBJECTIVE: To increase the utilization and reduce the cost of operating theatre, and to improve surgeons' satisfaction in the meantime, a practical surgery scheduling which could assign the operating room (OR) and surgeon for the surgery and sequence surgeries in each OR was provided for hospital managers...
December 29, 2017: Technology and Health Care: Official Journal of the European Society for Engineering and Medicine
https://www.readbyqxmd.com/read/29331909/linking-composition-of-extracellular-polymeric-substances-eps-to-the-physical-structure-and-hydraulic-resistance-of-membrane-biofilms
#2
Peter Desmond, James P Best, Eberhard Morgenroth, Nicolas Derlon
The effect of extracellular polymeric substances (EPS) on the meso-scale physical structure and hydraulic resistance of membrane biofilms during gravity driven membrane (GDM) filtration was investigated. Biofilms were developed on the surface of ultrafiltration membranes during dead-end filtration at ultra-low pressure (70 mbar). Biofilm EPS composition (total protein, polysaccharide and eDNA) was manipulated by growing biofilms under contrasting nutrient conditions. Nutrient conditions consisted of (i) a nutrient enriched condition with a nutrient ratio of 100:30:10 (C: N: P), (ii) a phosphorus limitation (C: N: P ratio: 100:30:0), and (iii) a nitrogen limitation (C: N: P ratio: 100:0:10)...
December 27, 2017: Water Research
https://www.readbyqxmd.com/read/29331854/trade-offs-between-forest-carbon-stocks-and-harvests-in-a-steady-state-a-multi-criteria-analysis
#3
Kim Pingoud, Tommi Ekholm, Risto Sievänen, Saija Huuskonen, Jari Hynynen
This paper provides a perspective for comparing trade-offs between harvested wood flows and forest carbon stocks with different forest management regimes. A constant management regime applied to a forest area with an even age-class distribution leads to a steady state, in which the annual harvest and carbon stocks remain constant over time. As both are desirable - carbon stocks for mitigating climate change and harvests for the economic use of wood and displacing fossil fuels - an ideal strategy should be chosen from a set of management regimes that are Pareto-optimal in the sense of multi-criteria decision-making...
January 11, 2018: Journal of Environmental Management
https://www.readbyqxmd.com/read/29331437/influence-of-operator-experience-and-pci-volume-on-transfemoral-access-techniques-a-collaboration-of-international-cardiovascular-societies
#4
Daniel W Nelson, Abdulla A Damluji, Nish Patel, Marco Valgimigli, Stephan Windecker, Robert Byrne, James Nolan, Tejas Patel, Emmanouil Brilakis, Subhash Banerjee, Jorge Mayol, Warren J Cantor, Carlos E Alfonso, Sunil V Rao, Mauro Moscucci, Mauricio G Cohen
INTRODUCTION: Transfemoral access (TFA) is widely used for coronary angiography and percutaneous coronary intervention (PCI). The influence of operator age, gender, experience, and procedural volume on performance of femoral arterial access has not been studied. METHODS: A survey instrument was developed and distributed via e-mail from professional societies to interventional cardiologists worldwide from March to December 2016. RESULTS: A total of 988 physicians from 88 countries responded to the survey...
December 27, 2017: Cardiovascular Revascularization Medicine: Including Molecular Interventions
https://www.readbyqxmd.com/read/29331134/coarse-grained-model-of-nanoscale-segregation-water-diffusion-and-proton-transport-in-nafion-membranes
#5
Aleksey Vishnyakov, Runfang Mao, Ming-Tsung Lee, Alexander V Neimark
We present a coarse-grained model of the acid form of Nafion membrane that explicitly includes proton transport. This model is based on a soft-core bead representation of the polymer implemented into the dissipative particle dynamics (DPD) simulation framework. The proton is introduced as a separate charged bead that forms dissociable Morse bonds with water beads. Morse bond formation and breakup artificially mimics the Grotthuss hopping mechanism of proton transport. The proposed DPD model is parameterized to account for the specifics of the conformations and flexibility of the Nafion backbone and sidechains; it treats electrostatic interactions in the smeared charge approximation...
January 14, 2018: Journal of Chemical Physics
https://www.readbyqxmd.com/read/29329686/highlighting-priority-areas-for-bovine-viral-diarrhea-control-in-italy-a-phylogeographic-approach
#6
Erika Ebranati, Stefania Lauzi, Francesco Cerutti, Claudio Caruso, Loretta Masoero, Ana Moreno, Gian Mario De Mia, Simone Peletto, Gianguglielmo Zehender, Camilla Luzzago
The prevalence and genetic diversity of bovine viral diarrhea virus (BVDV) in a geographic area are largely influenced by live animal trade and management practices. Despite control and eradication programs currently underway in several European countries, the risk of BVDV spread within and among countries is still present. BVDV-1 is the predominant type circulating in European cattle population. In this study, a phylogeographic analysis was applied to the BVDV-1 highest prevalent subtypes in Italy to reconstruct the origin and spatial-temporal distribution and to trace main viral flows between different locations to highlight priority areas for BVDV control...
January 9, 2018: Infection, Genetics and Evolution
https://www.readbyqxmd.com/read/29329187/deceased-donor-organ-transplantation-performed-in-the-united-states-for-non-citizens-and-non-residents
#7
Francis L Delmonico, Susan Gunderson, Kishore R Iyer, Gabriel M Danovitch, Timothy L Pruett, Jorge D Reyes, Nancy L Ascher
Since 2012, the Organ Procurement and Transplantation Network (OPTN)/United Network for Organ Sharing (UNOS) has required transplant centers to record the citizenship and residency status of patients undergoing transplantation in the United States. This policy replaced the 5% threshold of the non-US citizen/non-U.S. residents (NC/NR) undergoing organ transplantation that could result in an audit of transplant center activity.We analyzed the frequency of NC/NR deceased donor organ transplants and wait list registrations at all US transplant centers using data provided by UNOS for that purpose to the UNOS Ad Hoc International Relations Committee...
January 11, 2018: Transplantation
https://www.readbyqxmd.com/read/29329003/modified-forest-rotation-lengths-long-term-effects-on-landscape-scale-habitat-availability-for-specialized-species
#8
Jean-Michel Roberge, Karin Öhman, Tomas Lämås, Adam Felton, Thomas Ranius, Tomas Lundmark, Annika Nordin
We evaluated the long-term implications from modifying rotation lengths in production forests for four forest-reliant species with different habitat requirements. By combining simulations of forest development with habitat models, and accounting both for stand and landscape scale influences, we projected habitat availability over 150 years in a large Swedish landscape, using rotation lengths which are longer (+22% and +50%) and shorter (-22%) compared to current practices. In terms of mean habitat availability through time, species requiring older forest were affected positively by extended rotations, and negatively by shortened rotations...
January 9, 2018: Journal of Environmental Management
https://www.readbyqxmd.com/read/29328775/breast-specimen-processing-and-reporting-with-an-emphasis-on-margin-evaluation
#9
Anthony J Guidi, Joseph A Tworek, Daniel D Mais, Rhona J Souers, Barbara J Blond, Richard W Brown
CONTEXT: The College of American Pathologists (CAP) developed protocols for reporting pathologic characteristics of breast cancer specimens, including margin status. The Society of Surgical Oncology (SSO) and the American Society for Radiation Oncology (ASTRO) published treatment guidelines regarding margins in patients with invasive cancer; and SSO, ASTRO, and the American Society of Clinical Oncology (ASCO) recently published guidelines for patients with ductal carcinoma in situ. OBJECTIVE: - To assess current practices among pathologists with regard to the processing/reporting of breast specimens, assess compliance with CAP cancer protocols, and assess alignment with SSO/ASTRO and SSO/ASTRO/ASCO guidelines...
January 12, 2018: Archives of Pathology & Laboratory Medicine
https://www.readbyqxmd.com/read/29328126/universal-phase-depth-mapping-in-a-structured-light-field
#10
Zewei Cai, Xiaoli Liu, Xiang Peng, Bruce Z Gao
Technologies and devices for light field imaging have recently been developed for both industrial applications and scientific research to achieve excellent imaging properties. In our previous work, we combined light field imaging with structured illumination to propose a structured light field method in which multidirectional depth estimation can be performed for high-quality 3D imaging. However, the projection axis was implicitly assumed to be perpendicular to the reference plane, which is hard to meet in practice...
January 1, 2018: Applied Optics
https://www.readbyqxmd.com/read/29326453/the-use-of-hall-technique-preformed-metal-crowns-by-specialist-paediatric-dentists-in-the-uk
#11
A Roberts, A McKay, S Albadri
Background Hall technique preformed metal crowns (HTPMCs) have been increasing in use recently, but little is currently known about their use by specialists.Aim To investigate the views and usage of HTPMCs by UK specialist paediatric dentists.Design This was a prospective questionnaire-based study, distributed online to all specialists on the British Society of Paediatric Dentistry email list between July and September 2014.Results Ninety-four questionnaires were completed. The majority of respondents, 65% (61) worked in teaching hospitals, followed by community dental services, 37% (35)...
January 12, 2018: British Dental Journal
https://www.readbyqxmd.com/read/29326046/multi-tissue-partial-volume-quantification-in-multi-contrast-mri-using-an-optimised-spectral-unmixing-approach
#12
Guylaine Collewet, Saïd Moussaoui, Cécile Deligny, Tiphaine Lucas, Jérôme Idier
Multi-tissue partial volume estimation in MRI images is investigated with a viewpoint related to spectral unmixing as used in hyperspectral imaging. The main contribution of this paper is twofold. It firstly proposes a theoretical analysis of the statistical optimality conditions of the proportion estimation problem, which in the context of multi-contrast MRI data acquisition allows to appropriately set the imaging sequence parameters. Secondly, an efficient proportion quantification algorithm based on the minimisation of a penalised least-square criterion incorporating a regularity constraint on the spatial distribution of the proportions is proposed...
January 8, 2018: Magnetic Resonance Imaging
https://www.readbyqxmd.com/read/29325943/neurosurgical-care-availability-and-access-in-low-and-middle-income-countries
#13
Maria Punchak, Swagoto Mukhopadhyay, Sonal Sachdev, Ya-Ching Hung, Sophie Peeters, Abbas Rattani, Michael Dewan, Walter D Johnson, Kee B Park
BACKGROUND: An estimated 5 billion people worldwide lack access to basic surgical care. In particular, the vast majority of low- and middle-income countries (LMICs) currently struggle to provide adequate neurosurgical services. Significant barriers exist, including limited access to trained medical, nursing and allied health staff, lack of equipment, and availability of services at reasonable distance and at reasonable cost to patients. An accurate assessment of current neurosurgical capacity in LIMCs is an essential first step in tackling this deficit...
January 8, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29325804/heart-failure-in-numbers-estimates-for-the-21st-century-in-portugal
#14
Cândida Fonseca, Daniel Brás, Inês Araújo, Fátima Ceia
INTRODUCTION AND OBJECTIVE: Heart failure is a major public health problem that affects a large number of individuals and is associated with high mortality and morbidity. This study aims to estimate the probable scenario for HF prevalence and its consequences in the short-, medium- and long-term in Portugal. METHODS: This assessment is based on the EPICA (Epidemiology of Heart Failure and Learning) project, which was designed to estimate the prevalence of chronic heart failure in mainland Portugal in 1998...
January 8, 2018: Portuguese Journal of Cardiology: An Official Journal of the Portuguese Society of Cardiology
https://www.readbyqxmd.com/read/29325708/promising-roles-for-pharmacists-in-addressing-the-u-s-opioid-crisis
#15
Wilson M Compton, Christopher M Jones, Jack B Stein, Eric M Wargo
Overdoses of prescription or illicit opioids claimed the lives of 116 Americans each day in 2016, and the crisis continues to escalate. As healthcare systems evolve to address the crisis, the potential of pharmacists to make a positive difference is significant. In addition to utilizing available prescription drug monitoring programs to help prevent diversion of opioids, practicing pharmacists can be alert for signs of opioid misuse by patients (e.g., multiple prescriptions from different physicians) as well as inappropriate prescribing or hazardous drug combinations that physicians may not be aware of (e...
December 31, 2017: Research in Social & Administrative Pharmacy: RSAP
https://www.readbyqxmd.com/read/29325528/knowledge-attitudes-and-practices-regarding-cervical-cancer-and-screening-among-women-visiting-primary-health-care-centres-in-bahrain
#16
Ghufran Jassim, Alaaeddin Obeid, Huda A Al Nasheet
BACKGROUND: Cervical cancer is one of the most common cancers among women, with 80% of the cases occurring in developing countries. Cervical cancer is largely preventable by effective screening programs. This has not been possible with opportunistic screening and its low use in the Kingdom of Bahrain. The objective of this study was to explore the knowledge, attitudes, and practices of women attending primary care health centres for cervical cancer screening. METHODS: This was a cross-sectional study of 300 women attending primary health care centres in Bahrain...
January 11, 2018: BMC Public Health
https://www.readbyqxmd.com/read/29324850/generalization-of-the-ewens-sampling-formula-to-arbitrary-fitness-landscapes
#17
Pavel Khromov, Constantin D Malliaris, Alexandre V Morozov
In considering evolution of transcribed regions, regulatory sequences, and other genomic loci, we are often faced with a situation in which the number of allelic states greatly exceeds the size of the population. In this limit, the population eventually adopts a steady state characterized by mutation-selection-drift balance. Although new alleles continue to be explored through mutation, the statistics of the population, and in particular the probabilities of seeing specific allelic configurations in samples taken from the population, do not change with time...
2018: PloS One
https://www.readbyqxmd.com/read/29324760/bionomics-of-phlebotomus-argentipes-in-villages-in-bihar-india-with-insights-into-efficacy-of-irs-based-control-measures
#18
David M Poché, Rajesh B Garlapati, Shanta Mukherjee, Zaria Torres-Poché, Epco Hasker, Tahfizur Rahman, Aakanksha Bharti, Vishnu P Tripathi, Suman Prakash, Rahul Chaubey, Richard M Poché
BACKGROUND: Visceral leishmaniasis (VL) is a deadly vector-borne disease. Approximately 90% of Indian VL cases occur in Bihar, where the sand fly, Phlebotomus argentipes, is the principal vector. Sand fly control in Bihar consists of indoor residual spraying (IRS), the practice of spraying the inner walls of village dwellings with insecticides. Prior researchers have evaluated success of IRS-control by estimating vector abundance in village houses, but the number of sampling periods (n = 2-3) were minimal, and outdoor-resting P...
January 2018: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/29324723/error-recovery-in-the-time-triggered-paradigm-with-ftt-can
#19
Luis Marques, Verónica Vasconcelos, Paulo Pedreiras, Luís Almeida
Data networks are naturally prone to interferences that can corrupt messages, leading to performance degradation or even to critical failure of the corresponding distributed system. To improve resilience of critical systems, time-triggered networks are frequently used, based on communication schedules defined at design-time. These networks offer prompt error detection, but slow error recovery that can only be compensated with bandwidth overprovisioning. On the contrary, the Flexible Time-Triggered (FTT) paradigm uses online traffic scheduling, which enables a compromise between error detection and recovery that can achieve timely recovery with a fraction of the needed bandwidth...
January 11, 2018: Sensors
https://www.readbyqxmd.com/read/29324678/immobilization-of-enzymes-on-a-phospholipid-bionically-modified-polysulfone-gradient-pore-membrane-for-the-enhanced-performance-of-enzymatic-membrane-bioreactors
#20
Yizong Guo, Xueyan Zhu, Fei Fang, Xiao Hong, Huimin Wu, Dajing Chen, Xiaojun Huang
Enzymatic membrane bioreactors (EMBRs), with synergistic catalysis-separation performance, have increasingly been used for practical applications. Generally, the membrane properties, particularly the pore structures and interface interactions, have a significant impact on the catalytic efficiency of the EMBR. Therefore, a biomimetic interface based on a phospholipid assembled onto a polysulfone hollow-fiber membrane with perfect radial gradient pores (RGM-PSF) has been prepared in this work to construct a highly efficient and stable EMBR...
January 11, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
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