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https://www.readbyqxmd.com/read/29341772/determinant-diagrammatic-monte%C3%A2-carlo-algorithm-in-the-thermodynamic-limit
#1
Riccardo Rossi
We present a simple trick that allows us to consider the sum of all connected Feynman diagrams at fixed position of interaction vertices for general fermionic models, such that the thermodynamic limit can be taken analytically. With our approach one can achieve superior performance compared to conventional diagrammatic Monte Carlo algorithm, while rendering the algorithmic part dramatically simpler. By considering the sum of all connected diagrams at once, we allow for massive cancellations between different diagrams, greatly reducing the sign problem...
July 28, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/29338296/tips-and-tricks-in-axillary-cannulation
#2
Ilir Hysi, Carlos Renaut, Olivier Fabre
No abstract text is available yet for this article.
January 1, 2018: Asian Cardiovascular & Thoracic Annals
https://www.readbyqxmd.com/read/29337339/l%C3%A3-ngvarigt-trendelenburgs-l%C3%A3-ge-kan-orsaka-%C3%A3-gonskador-kortad-operationstid-i-tippat-l%C3%A3-ge-och-justering-av-tippningsvinkeln-kan-minska-risken
#3
Olof Hallböök, Rune Sjödahl
Risk of optic nerve injury after prolonged Trendelenburg's position Postoperative loss of vision due to acute ischaemic optic nerve injury is a rare complication following pelvic surgery. A steep Trendelenburg's position of the patient, high intraabdominal pressure and a long operative time in Trendelenburg's position are recognised risk factors associated with robot-assisted pelvic surgery. This manuscript presents the underlying pathophysiologic mechanism. Practical tips and tricks for prevention are discussed...
January 15, 2018: Läkartidningen
https://www.readbyqxmd.com/read/29332121/pattern-onset-ergs-and-veps-produced-by-patterns-arising-from-light-increment-and-decrement
#4
Dennis M Fritsch, Jane C Sowden, Dorothy A Thompson
Purpose: Our aim was to elaborate how on and off signals contribute to pattern ERGs and pattern visual evoked potentials (VEPs) by using pedestal patterns arising from incremental and decremental onset stimulation. Methods: Pattern onset/offset ERGs and VEPs were produced by black and white checks of 60' side length and 88% spatial contrast appearing in a 16° field for 200 ms from white (110 cd/m2), black (7 cd/m2), and gray (48 cd/m2) backgrounds and disappeared for 1000 ms...
January 1, 2018: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/29330338/diagnosis-management-histology-and-genetics-of-sporadic-primary-hyperparathyroidism-old-knowledge-with-new-tricks
#5
Maria Mizamtsidi, Constantinos Nastos, George Mastorakos, Roberto Dina, Ioannis Vassiliou, Maria Gazouli, Fausto Palazzo
Primary hyperparathyroidism (pHPT) is a common endocrinopathy resulting from inappropriately high PTH secretion. It usually results from the presence of a single gland adenoma, multiple gland hyperplasia or rarely parathyroid carcinoma. All these conditions require different management and it is important to be able to differentiate the underlined pathology, in order for the clinicians to provide the best therapeutic approach. Elucidation of the genetic background of each of these clinical entities would be of great interest...
January 12, 2018: Endocrine Connections
https://www.readbyqxmd.com/read/29330163/affective-stimuli-in-behavioural-interventions-soliciting-for-health-check-up-services-and-the-service-users-socioeconomic-statuses-a-study-at-japanese-pachinko-parlours
#6
Naoki Kondo, Yoshiki Ishikawa
BACKGROUND: Socioeconomically vulnerable people are likely to have more health risks because of inadequate behaviour choices related to chronic social stresses. Brain science suggests that stress causes cognitively biased automatic decision making, preferring instant stress relief and pleasure (eg, smoking, alcohol use and drug abuse) as opposed to reflectively seeking health-maintenance services (eg, health check-ups). As such, hedonic stimuli that nudge people towards preventive actions could reduce health behaviour disparities...
January 12, 2018: Journal of Epidemiology and Community Health
https://www.readbyqxmd.com/read/29330074/a-nonlinear-continuous-time-model-for-a-semelparous-species
#7
A Veprauskas
Periodical semelparous insects such as cicadas and May beetles exhibit synchronization in age classes such that only one age class is present at any point of time. This leads to outbreaks of adults as they all reach maturity around the same time. Discrete-time models of semelparous species have shown that this type of synchronous cycling can occur as a result of greater between-class competition relative to within-class competition. However, relatively few studies have examined continuous-time models of semelparous species...
January 9, 2018: Mathematical Biosciences
https://www.readbyqxmd.com/read/29322963/botulinum-toxin-in-meige-s-syndrome-a-video-based-case-series
#8
Sanjay Pandey, Soumya Sharma
CONTEXT: Despite being the most common cause of cranial dystonia, Meige's syndrome remains a rare clinical entity. Characterized by blepharospasm and orofacial dystonia, patients suffering from Meige's syndrome benefit from the injection of botulinum toxin (BTX). AIMS: As the majority of the studies tend to discuss Meige's syndrome with blepharospasm patients, there is a paucity of case-based studies dealing exclusively with this syndrome. Hence, we intended to characterize and define the evolution of this syndrome and objectively determine the response of the patients suffering from this entity to BTX therapy...
January 2018: Neurology India
https://www.readbyqxmd.com/read/29303519/teaching-an-old-scaffold-new-recognition-tricks-oligopyrrolamide-antagonists-of-iapp-aggregation
#9
Sunil Kumar, Maria C Vogel, Andrew D Hamilton
A library of N-substituted oligopyrrolamides was designed to modulate the aggregation kinetics of islet amyloid polypeptide (IAPP). IAPP is a hormonal peptide, co-secreted with insulin in the pancreatic β-cells. IAPP samples a variety of conformations, starting from a native random coil to membrane-associated α-helical intermediates and eventually terminates in the amyloid plaques rich in β-sheet structures. A growing body of evidence suggests that membrane bound α-helical intermediates are the key cytotoxic species that impair the functionality and viability of β-cells and contribute to the onset of type 2 diabetes mellitus (DM2)...
January 5, 2018: Organic & Biomolecular Chemistry
https://www.readbyqxmd.com/read/29298439/tips-tricks-and-advantages-of-27-g-vitrectomy
#10
Konstantinos Anastasilakis, Anna Mourgela, Dhmos Kaniouras, Konstantinos Moschou
PURPOSE: We present the advantages and technique variations of 27-G vitrectomy in a variety of surgical retina cases. METHODS: Patients with epiretinal membrane, retinal detachment, and proliferative diabetic retinopathy with vitreous hemorrhage and tractional detachments underwent 27-G vitrectomy. We present technique tricks, solutions to various problems and pitfalls, and the advantages of 27-G vitrectomy. RESULTS: Postoperative visual acuity improved significantly in all patients...
January 3, 2018: Ophthalmologica. Journal International D'ophtalmologie
https://www.readbyqxmd.com/read/29297397/time-sensitive-therapeutics
#11
REVIEW
John J Marini
Much of what we now do in Critical Care carries an air of urgency, a pressing need to discover and act, with priorities biased toward a reactive response. However, efficacy often depends not simply upon what we do, but rather on whether, when, and how persistently we intervene. The practice of medicine is based upon diagnosis, integration of multiple sources of information, keen judgment, and appropriate intervention. Timing may not be everything, as the well-known adage suggests, but in the intensive care unit (ICU) timing issues clearly deserve more attention than they are currently given...
December 28, 2017: Critical Care: the Official Journal of the Critical Care Forum
https://www.readbyqxmd.com/read/29285411/simple-training-tricks-for-mastering-and-taming-bypass-procedures-in-neurosurgery
#12
Ahmad Hafez, Rahul Raj, Michael T Lawton, Mika Niemelä
Background: Neurosurgeons devoted to bypass neurosurgery or revascularization neurosurgery are becoming scarcer. From a practical point of view, "bypass neurosurgeons" are anastomosis makers, vessels technicians, and time-racing repairers of vessel walls. This requires understanding the key features and hidden tricks of bypass surgery. The goal of this paper is to provide simple and inexpensive tricks for taming the art of bypass neurosurgery. Most of these tricks and materials described can be borrowed, donated, or purchased inexpensively...
2017: Surgical Neurology International
https://www.readbyqxmd.com/read/29281673/taxonomic-differences-of-gut-microbiomes-drive-cellulolytic-enzymatic-potential-within-hind-gut-fermenting-mammals
#13
Emma C L Finlayson-Trick, Landon J Getz, Patrick D Slaine, Mackenzie Thornbury, Emily Lamoureux, Jamie Cook, Morgan G I Langille, Lois E Murray, Craig McCormick, John R Rohde, Zhenyu Cheng
Host diet influences the diversity and metabolic activities of the gut microbiome. Previous studies have shown that the gut microbiome provides a wide array of enzymes that enable processing of diverse dietary components. Because the primary diet of the porcupine, Erethizon dorsatum, is lignified plant material, we reasoned that the porcupine microbiome would be replete with enzymes required to degrade lignocellulose. Here, we report on the bacterial composition in the porcupine microbiome using 16S rRNA sequencing and bioinformatics analysis...
2017: PloS One
https://www.readbyqxmd.com/read/29281185/hepatitis-c-virus-enslavement-of-host-factors
#14
REVIEW
Geetika Sharma, Harsha Raheja, Saumitra Das
Hepatitis C virus (HCV) has infected over 170 million people world-wide. This infection causes severe liver damage that can progress to hepatocellular carcinoma leading to death of the infected patients. Development of a cell culture model system for the study of HCV infection in the recent past has helped the researchers world-wide to understand the biology of this virus. Studies over the past decade have revealed the tricks played by the virus to sustain itself, for as long as 40 years, in the host setup without being eliminated by the immune system...
January 2018: IUBMB Life
https://www.readbyqxmd.com/read/29280156/the-many-roles-of-type-ii-phosphatidylinositol-4-kinases-in-membrane-trafficking-new-tricks-for-old-dogs
#15
Shane Minogue
The type II phosphatidylinositol 4-kinases (PI4KIIs) produce the lipid phosphatidylinositol 4-phosphate (PtdIns4P) and participate in a confusing variety of membrane trafficking and signaling roles. This review argues that both historical and contemporary evidence supports the function of the PI4KIIs in numerous trafficking pathways, and that the key to understanding the enzymatic regulation is through membrane interaction and the intrinsic membrane environment. By summarizing new research and examining the trafficking roles of the PI4KIIs in the context of recently solved molecular structures, I highlight how mechanisms of PI4KII function and regulation are providing insights into the development of cancer and in neurological disease...
December 27, 2017: BioEssays: News and Reviews in Molecular, Cellular and Developmental Biology
https://www.readbyqxmd.com/read/29276357/sample-size-calculations-for-comparing-groups-with-binary-outcomes
#16
Xunan Zhang, Jiangnan Lyu, Justin Tu, Jinyuan Liu, Xiang Lu
Sample size is a critical parameter for clinical studies. However, to many biomedical and psychosocial investigators, power and sample size analysis seems like a magic trick of statisticians. In this paper, we continue to discuss power and sample size calculations by focusing on binary outcomes. We again emphasize the importance of close interactions between investigators and biostatisticians in setting up hypotheses and carrying out power analyses.
October 25, 2017: Shanghai Archives of Psychiatry
https://www.readbyqxmd.com/read/29273874/safety-and-feasibility-of-the-robotic-platform-in-the-management-of-surgical-sequelae-of-chronic-pancreatitis
#17
Ahmad Hamad, Mazen S Zenati, Trang K Nguyen, Melissa E Hogg, Herbert J Zeh, Amer H Zureikat
BACKGROUND/AIM: The application of minimally invasive surgery to chronic pancreatitis (CP) procedures is uncommon. Our objective was to report the safety and feasibility of the robotic approach in the treatment of surgical sequelae of CP, and provide insights into the technique, tricks, and pitfalls associated with the application of robotics to this challenging disease entity. METHODS: A retrospective review of a prospectively maintained database of patients undergoing robotic-assisted resections and/or drainage procedures for CP at the University of Pittsburgh between May 2009 and January 2017 was performed...
December 22, 2017: Surgical Endoscopy
https://www.readbyqxmd.com/read/29273582/the-role-of-chloroplasts-in-plant-pathology
#18
REVIEW
Robert G Sowden, Samuel J Watson, Paul Jarvis
Plants have evolved complex tolerance systems to survive abiotic and biotic stresses. Central to these programmes is a sophisticated conversation of signals between the chloroplast and the nucleus. In this review, we examine the antagonism between abiotic stress tolerance (AST) and immunity: we propose that to generate immunogenic signals, plants must disable AST systems, in particular those that manage reactive oxygen species (ROS), while the pathogen seeks to reactivate or enhance those systems to achieve virulence...
December 21, 2017: Essays in Biochemistry
https://www.readbyqxmd.com/read/29258642/career-focus-film-falsies
#19
Amy Brewerton
Dental technician Gary Archer makes removable prosthodontic devices for hollywood movies. he shares some of the tricks of the trade with PDJ managing editor Amy Brewerton.
December 1, 2017: Primary Dental Journal
https://www.readbyqxmd.com/read/29244758/protein-subcellular-localization-with-gaussian-kernel-discriminant-analysis-and-its-kernel-parameter-selection
#20
Shunfang Wang, Bing Nie, Kun Yue, Yu Fei, Wenjia Li, Dongshu Xu
Kernel discriminant analysis (KDA) is a dimension reduction and classification algorithm based on nonlinear kernel trick, which can be novelly used to treat high-dimensional and complex biological data before undergoing classification processes such as protein subcellular localization. Kernel parameters make a great impact on the performance of the KDA model. Specifically, for KDA with the popular Gaussian kernel, to select the scale parameter is still a challenging problem. Thus, this paper introduces the KDA method and proposes a new method for Gaussian kernel parameter selection depending on the fact that the differences between reconstruction errors of edge normal samples and those of interior normal samples should be maximized for certain suitable kernel parameters...
December 15, 2017: International Journal of Molecular Sciences
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