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https://www.readbyqxmd.com/read/29161008/mapping-the-functional-tortuosity-and-spatio-temporal-heterogeneity-of-porous-polymer-membranes-with-super-resolution-nanoparticle-tracking
#1
Yu Cai, Daniel K Schwartz
As particles flow through porous media, they follow complex pathways and experience heterogeneous environments that are challenging to characterize. Tortuosity is often used as a parameter to characterize the complexity of pathways in porous materials and is useful in understanding hindered mass transport in industrial filtration and mass separation processes. However, conventional calculations of tortuosity provide only average values under static conditions; they are insensitive to the intrinsic heterogeneity of porous media and do not account for potential effects of operating conditions...
November 21, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29159555/use-of-a-hands-free-instantaneous-closed-loop-communication-device-improves-perception-of-communication-and-workflow-integration-in-an-academic-teaching-hospital-a-pilot-study
#2
Daniel Z Fang, Teja Patil, Ilana Belitskaya-Levy, Marianne Yeung, Keith Posley, Nazima Allaudeen
Efficient and effective communication between providers is critical to quality patient care within a hospital system. Hands free communication devices (HFCD) allow instantaneous, closed-loop communication between physicians and other members of a multidisciplinary team, providing a communication advantage over traditional pager systems. HFCD have been shown to decrease emergency room interruptions, improve nursing communication, improve speed of information flow, and eliminate health care waste. We evaluated the integration of an HFCD with an existing alphanumeric paging system on an acute inpatient medicine service...
November 17, 2017: Journal of Medical Systems
https://www.readbyqxmd.com/read/29158177/granger-causal-connectivity-dissociates-navigation-networks-that-subserve-allocentric-and-egocentric-path-integration
#3
Chin-Teng Lin, Te-Cheng Chiu, Yu-Kai Wang, Chun-Hsiang Chuang, Klaus Gramann
Studies on spatial navigation demonstrate a significant role of the retrosplenial complex (RSC) in the transformation of egocentric and allocentric information into complementary spatial reference frames (SRFs). The tight anatomical connections of the RSC with a wide range of other cortical regions processing spatial information support its vital role within the human navigation network. To better understand how different areas of the navigational network interact, we investigated the dynamic causal interactions of brain regions involved in solving a virtual navigation task...
November 17, 2017: Brain Research
https://www.readbyqxmd.com/read/29157767/nurses-perceptions-of-patient-care-continuity-in-day-surgery
#4
Marja Renholm, Tarja Suominen, Pauli Puukka, Helena Leino-Kilpi
PURPOSE: The increase in day surgery has brought about a significant change in patient care and care continuity. The purpose of this study was to analyze nurses' perceptions of the realization of continuity of care in day surgery. Continuity of care is examined from the perspectives of time, flow, co-ordination flow, caring relationship flow, and information flow. DESIGN: Descriptive study. METHODS: A questionnaire including demographics and questions about continuity of care was completed by 83 of the 120 eligible nurses (response rate, 69%) in one hospital district in Finland...
December 2017: Journal of Perianesthesia Nursing: Official Journal of the American Society of PeriAnesthesia Nurses
https://www.readbyqxmd.com/read/29157446/dynamic-visualization-of-multi-level-molecular-data-the-director-package-in-r
#5
Katherine Icay, Chengyu Liu, Sampsa Hautaniemi
BACKGROUND AND OBJECTIVE: High-throughput measurement technologies have triggered a rise in large-scale cancer studies containing multiple levels of molecular data. While there are a number of efficient methods to analyze individual data types, there are far less that enhance data interpretation after analysis. We present the R package Director, a dynamic visualization approach to linking and interrogating multiple levels of molecular data after analysis for clinically meaningful, actionable insights...
January 2018: Computer Methods and Programs in Biomedicine
https://www.readbyqxmd.com/read/29157365/the-future-of-imaging-in-detecting-glaucoma-progression
#6
Fabio Lavinsky, Gadi Wollstein, Jenna Tauber, Joel S Schuman
Ocular imaging has been heavily incorporated into glaucoma management and provides important information that aids in the detection of disease progression. Longitudinal studies have shown that the circumpapillary retinal nerve fiber layer is an important parameter for glaucoma progression detection, whereas other studies have demonstrated that macular parameters, such as the ganglion cell inner plexiform layer and optic nerve head parameters, also are useful for progression detection. The introduction of novel technologies with faster scan speeds, wider scanning fields, higher resolution, and improved tissue penetration has enabled the precise quantification of additional key ocular structures, such as the individual retinal layers, optic nerve head, choroid, and lamina cribrosa...
December 2017: Ophthalmology
https://www.readbyqxmd.com/read/29155938/cerebral-autoregulation-in-cardiopulmonary-bypass-surgery-a-systematic-review
#7
Juliana R Caldas, Victoria J Haunton, Ronney B Panerai, Ludhmila A Hajjar, Thompson G Robinson
Cardiopulmonary bypass surgery is associated with a high incidence of neurological complications, including stroke, delirium and cognitive impairment. The development of strategies to reduce the incidence of such neurological events has been hampered by the lack of a clear understanding of their pathophysiology. Cerebral autoregulation (CA), which describes the ability of the brain to maintain a stable cerebral blood flow over a wide range of cerebral perfusion pressures despite changes in blood pressure, is known to be impaired in various neurological disorders...
November 16, 2017: Interactive Cardiovascular and Thoracic Surgery
https://www.readbyqxmd.com/read/29155776/differential-effects-of-lipid-lowering-drugs-in-modulating-morphology-of-cholesterol-particles
#8
Shanmugavel Madasamy, David Liu, Jason Lundry, Benjamin Alderete, Raymond Kong, J Paul Robinson, Alan H B Wu, Edward P Amento
Treatment of dyslipidemia patients with lipid-lowering drugs leads to a significant reduction in low-density lipoproteins (LDL) level and a low to moderate level of increase in high-density lipoprotein (HDL) cholesterol in plasma. However, a possible role of these drugs in altering morphology and distribution of cholesterol particles is poorly understood. Here, we describe the in vitro evaluation of lipid-lowering drug effects in modulating morphological features of cholesterol particles using the plaque array method in combination with imaging flow cytometry...
November 10, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/29155716/evaluation-of-injury-induced-senescence-and-in-vivo-reprogramming-in-the-skeletal-muscle
#9
Coralie Cazin, Aurelie Chiche, Han Li
Cellular senescence is a stress response that is characterized by a stable cellular growth arrest, which is important for many physiological and pathological processes, such as cancer and ageing. Recently, senescence has also been implicated in tissue repair and regeneration. Therefore, it has become increasingly critical to identify senescent cells in vivo. Senescence-associated β-galactosidase (SA-β-Gal) assay is the most widely used assay to detect senescent cells both in culture and in vivo. This assay is based on the increased lysosomal contents in the senescent cells, which allows the histochemical detection of lysosomal β-galactosidase activity at suboptimum pH (6 or 5...
October 26, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/29153931/disturbances-in-oxygen-balance-during-cardiopulmonary-bypass-a-risk-factor-for-postoperative-delirium
#10
Nina Smulter, Helena Claesson Lingehall, Yngve Gustafson, Birgitta Olofsson, Karl Gunnar Engström, Micael Appelblad, Staffan Svenmarker
OBJECTIVE: The aim of this study was to determine risk factors for postoperative delirium after cardiac surgery, specifically associated with the conduct of cardiopulmonary bypass (CPB). DESIGN: Prospective observational study. SETTING: Heart Centre, University Hospital. PARTICIPANTS: The study included 142 patients aged 70 years and older scheduled for elective cardiac surgery with CPB. INTERVENTIONS: Risk factor analysis comprised information collected from the hospital clinical and CPB dedicated databases in addition to the medical chart...
August 25, 2017: Journal of Cardiothoracic and Vascular Anesthesia
https://www.readbyqxmd.com/read/29153591/informing-physician-strategies-to-overcome-language-barriers-in-encounters-with-pediatric-patients
#11
Natalie Guerrero, Alissa L Small, Rebecca J Schwei, Elizabeth A Jacobs
OBJECTIVES: To describe physician perceptions of differences in limited English proficient (LEP) pediatric encounters and the behavioral adaptations they make to provide quality care to LEP pediatric patients. METHODS: We conducted 30min, semi-structured interviews with 6 family physicians and 5 pediatricians in one health system. Audiotapes from each interview were transcribed verbatim then coded using content analysis. RESULTS: Multiple aspects of the LEP pediatric encounter were perceived by physicians as different from other encounters: trust and relationship between physician and LEP child/child's family, continuity of care, encounter's structure and flow, patient assessment, and communication barriers...
November 15, 2017: Patient Education and Counseling
https://www.readbyqxmd.com/read/29153322/bats-use-path-integration-rather-than-acoustic-flow-to-assess-flight-distance-along-flyways
#12
Gal Aharon, Meshi Sadot, Yossi Yovel
Navigation can be achieved using different strategies from simple beaconing to complex map-based movement [1-4]. Bats display remarkable navigation capabilities, ranging from nightly commutes of several kilometers and up to seasonal migrations over thousands of kilometers [5]. Many bats have been suggested to fly along fixed routes termed "flyways," when flying from their roost to their foraging sites [6]. Flyways commonly stretch along linear landscape elements such as tree lines, hedges, or rivers [7]. When flying along a flyway, bats must estimate the distance they have traveled in order to determine when to turn...
November 9, 2017: Current Biology: CB
https://www.readbyqxmd.com/read/29152448/vision-assisted-micromanipulation-using-closed-loop-actuation-of-multiple-microrobots
#13
M Arifur Rahman, Noboru Takahashi, Kawai F Siliga, Nigel K Ng, Zhidong Wang, Aaron T Ohta
Accurate control and precise positioning of opto-thermocapillary flow-addressed bubble microrobots are necessary for micromanipulation. In addition, micromanipulation using the simultaneous actuation of multiple microrobots requires a robust control system to enable independent motion. This paper demonstrates a hybrid closed-loop vision-assisted control system capable of actuating multiple microrobots simultaneously and positioning them at precise locations relative to micro-objects under manipulation. A vision-assisted grasp-planning application was developed and used to calculate the necessary trajectories of the microrobots to form cages around micro-objects...
2017: Robotics and Biomimetics
https://www.readbyqxmd.com/read/29151854/strong-population-structure-deduced-from-genetics-otolith-chemistry-and-parasite-abundances-explains-vulnerability-to-localized-fishery-collapse-in-a-large-sciaenid-fish-protonibea%C3%A2-diacanthus
#14
Laura Taillebois, Diane P Barton, David A Crook, Thor Saunders, Jonathan Taylor, Mark Hearnden, Richard J Saunders, Stephen J Newman, Michael J Travers, David J Welch, Alan Greig, Christine Dudgeon, Safia Maher, Jennifer R Ovenden
As pressure on coastal marine resources is increasing globally, the need to quantitatively assess vulnerable fish stocks is crucial in order to avoid the ecological consequences of stock depletions. Species of Sciaenidae (croakers, drums) are important components of tropical and temperate fisheries and are especially vulnerable to exploitation. The black-spotted croaker, Protonibea diacanthus, is the only large sciaenid in coastal waters of northern Australia where it is targeted by commercial, recreational and indigenous fishers due to its food value and predictable aggregating behaviour...
December 2017: Evolutionary Applications
https://www.readbyqxmd.com/read/29151789/discriminative-role-of-brachial-artery-doppler-parameters-in-correlation-with-hemodialysis-arteriovenous-fistula
#15
Burak Mehmet Çildağ, Kutsi Ömer Faruk Köseoğlu
Purpose: The aim of this study was to evaluate the flow volume and resistive index parameters of the brachial artery in the functioning and dysfunctioning radiocephalic and brachiocephalic hemodialysis arteriovenous fistula (AVF). Methods: 82 patients were distributed into three groups according to their hemodialysis function - as normal function, decreased pump flow and increased venous pressure. Flow volumes and resistive indexes (RI) of the brachial artery of radiocephalic and brachiocephalic AVFs were measured by Doppler ultrasound...
2017: Clujul Medical (1957)
https://www.readbyqxmd.com/read/29151604/quantitative-angle-insensitive-flow-measurement-using-relative-standard-deviation-oct
#16
Jiang Zhu, Buyun Zhang, Li Qi, Ling Wang, Qiang Yang, Zhuqing Zhu, Tiancheng Huo, Zhongping Chen
Incorporating different data processing methods, optical coherence tomography (OCT) has the ability for high-resolution angiography and quantitative flow velocity measurements. However, OCT angiography cannot provide quantitative information of flow velocities, and the velocity measurement based on Doppler OCT requires the determination of Doppler angles, which is a challenge in a complex vascular network. In this study, we report on a relative standard deviation OCT (RSD-OCT) method which provides both vascular network mapping and quantitative information for flow velocities within a wide range of Doppler angles...
October 30, 2017: Applied Physics Letters
https://www.readbyqxmd.com/read/29150090/graph-based-representation-of-behavior-in-detection-and-prediction-of-daily-living-activities
#17
Piotr Augustyniak, Grażyna Ślusarczyk
Various surveillance systems capture signs of human activities of daily living (ADLs) and store multimodal information as time line behavioral records. In this paper, we present a novel approach to the analysis of a behavioral record used in a surveillance system designed for use in elderly smart homes. The description of a subject's activity is first decomposed into elementary poses - easily detectable by dedicated intelligent sensors - and represented by the share coefficients. Then, the activity is represented in the form of an attributed graph, where nodes correspond to elementary poses...
November 10, 2017: Computers in Biology and Medicine
https://www.readbyqxmd.com/read/29149868/can-high-flow-nasal-cannula-reduce-the-rate-of-reintubation-in-adult-patients-after-extubation-a-meta-analysis
#18
Yue-Nan Ni, Jian Luo, He Yu, Dan Liu, Bin-Miao Liang, Rong Yao, Zong-An Liang
BACKGROUND: The effects of high flow nasal cannula (HFNC) on adult patients after extubation remain controversial. We aimed to further determine the effectiveness of HFNC in comparison to noninvasive positive pressure ventilation (NIPPV) and conventional oxygen therapy (COT). METHODS: The Pubmed, Embase, Medline, Cochrane Central Register of Controlled Trails (CENTRAL) as well as the Information Sciences Institute (ISI) Web of Science were searched for all the controlled study comparing HFNC with NIPPV and COT in adult patients after extubation...
November 17, 2017: BMC Pulmonary Medicine
https://www.readbyqxmd.com/read/29149837/assessment-of-genetic-diversity-in-vigna-unguiculata-l-walp-accessions-using-inter-simple-sequence-repeat-issr-and-start-codon-targeted-scot-polymorphic-markers
#19
David Okeh Igwe, Celestine Azubike Afiukwa, Benjamin Ewa Ubi, Kenneth Idika Ogbu, Omena Bernard Ojuederie, George Nkem Ude
BACKGROUND: Assessment of genetic diversity of Vigna unguiculata (L.) Walp (cowpea) accessions using informative molecular markers is imperative for their genetic improvement and conservation. Use of efficacious molecular markers to obtain the required knowledge of the genetic diversity within the local and regional germplasm collections can enhance the overall effectiveness of cowpea improvement programs, hence, the comparative assessment of Inter-simple sequence repeat (ISSR) and Start codon targeted (SCoT) markers in genetic diversity of V...
November 17, 2017: BMC Genetics
https://www.readbyqxmd.com/read/29149201/the-influence-of-filtering-and-downsampling-on-the-estimation-of-transfer-entropy
#20
Immo Weber, Esther Florin, Michael von Papen, Lars Timmermann
Transfer entropy (TE) provides a generalized and model-free framework to study Wiener-Granger causality between brain regions. Because of its nonparametric character, TE can infer directed information flow also from nonlinear systems. Despite its increasing number of applications in neuroscience, not much is known regarding the influence of common electrophysiological preprocessing on its estimation. We test the influence of filtering and downsampling on a recently proposed nearest neighborhood based TE estimator...
2017: PloS One
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