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https://www.readbyqxmd.com/read/29346511/sleep-and-health-in-older-adulthood-recent-advances-and-the-path-forward
#1
Adam P Spira
No abstract text is available yet for this article.
January 16, 2018: Journals of Gerontology. Series A, Biological Sciences and Medical Sciences
https://www.readbyqxmd.com/read/29346100/improving-color-constancy-in-an-ambient-light-environment-using-the-phong-reflection-model
#2
Sung-Min Woo, Sang-Ho Lee, Jun-Sang Yoo, Jong-Ok Kim
We present a physics-based illumination estimation approach explicitly designed to handle natural images under ambient light. Existing physics-based color constancy methods are theoretically perfect but do not handle real-world images well because the majority of these methods assume a single illuminant. Therefore, specular pixels selected using existing methods produce estimated dichromatic lines that are thick or curvilinear in the presence of ambient light, thus generating significant errors. Based on the Phong reflection model, we show that a group of specular pixels on a uniformly colored object, although they are subject to intensity thresholding, produce a unique dichromatic line length depending on the geometry of each image path...
April 2018: IEEE Transactions on Image Processing: a Publication of the IEEE Signal Processing Society
https://www.readbyqxmd.com/read/29346028/biophysics-model-of-heavy-ion-degradation-of-neuron-morphology-in-mouse-hippocampal-granular-cell-layer-neurons
#3
Murat Alp, Francis A Cucinotta
Exposure to heavy-ion radiation during cancer treatment or space travel may cause cognitive detriments that have been associated with changes in neuron morphology and plasticity. Observations in mice of reduced neuronal dendritic complexity have revealed a dependence on radiation quality and absorbed dose, suggesting that microscopic energy deposition plays an important role. In this work we used morphological data for mouse dentate granular cell layer (GCL) neurons and a stochastic model of particle track structure and microscopic energy deposition (ED) to develop a predictive model of high-charge and energy (HZE) particle-induced morphological changes to the complex structures of dendritic arbors...
January 18, 2018: Radiation Research
https://www.readbyqxmd.com/read/29345248/photo-assisted-hysteresis-of-electronic-transport-for-zno-nanowire-transistors
#4
Qianqian Du, Jiandong Ye, Zhonghua Xu, Shunming Zhu, Kun Tang, Shulin Gu, Youdou Zheng
Recently, ZnO nanowire field effect transistors (FETs) have received renewed interest due to their extraordinary low dimensionality and high sensitivity to external chemical environment and illumination conditions. These prominent properties have the promising potential in the nanoscale chemical and photo-sensors. In this article, we have fabricated ZnO nanowire FETs and have found hysteresis behaviors in their transfer characteristics. The mechanism and dynamics of the hysteresis phenomena have been investigated in detail by varying the sweeping rate and range of the gate bias with and without light irradiation...
January 18, 2018: Nanotechnology
https://www.readbyqxmd.com/read/29345207/thresholds-and-interpretations-how-clinical-competency-committees-identify-pediatric-residents-with-performance-concerns
#5
Daniel J Schumacher, Catherine Michelson, Sue Poynter, Michelle M Barnes, Su-Ting T Li, Natalie Burman, Daniel J Sklansky, Lynn Thoreson, Sharon Calaman, Beth King, Alan Schwartz, Sean Elliott, Tanvi Sharma, Javier Gonzalez Del Rey, Kathleen Bartlett, Shannon E Scott-Vernaglia, Kathleen Gibbs, Jon F McGreevy, Lynn C Garfunkel, Caren Gellin, John G Frohna
BACKGROUND: Clinical competency committee (CCC) identification of residents with performance concerns is critical for early intervention. METHODS: Program directors and 94 CCC members at 14 pediatric residency programs responded to a written survey prompt asking them to describe how they identify residents with performance concerns. Data was analyzed using thematic analysis. RESULTS: Six themes emerged from analysis and were grouped into two domains...
January 2018: Medical Teacher
https://www.readbyqxmd.com/read/29345149/medical-management-of-brain-metastases-and-leptomeningeal-disease-in-patients-with-breast-carcinoma
#6
Kelsey M Bowman, Priya Kumthekar
Breast cancer is the most common malignancy among women and accounts for the second highest number of cancer-related deaths. With patients surviving longer due to advances in systemic control, the incidence of CNS involvement is increasing; however, the management of CNS metastases has not undergone parallel advancements. The blood-brain barrier limits the efficacy of most systemic chemotherapies, and the utilization of surgery and radiation beyond first-line therapy is limited. We will explore the recent developments in the medical management of breast cancer brain metastasis...
January 18, 2018: Future Oncology
https://www.readbyqxmd.com/read/29344935/progressive-topological-disorganization-of-brain-network-in-focal-epilepsy
#7
K M Park, B I Lee, K J Shin, S Y Ha, J Park, T H Kim, C W Mun, S E Kim
OBJECTIVE: Increasing evidence has suggested that epilepsy is a network disease. Graph theory is a mathematical tool that allows for the analysis and quantification of the brain network. We aimed to evaluate the influences of duration of epilepsy on the topological organization of brain network in focal epilepsy patients with normal MRI using the graph theoretical analysis based on diffusion tenor imaging. METHODS: We prospectively enrolled 66 patients with focal epilepsy (18/66 patients were newly diagnosed) and 84 healthy subjects...
January 17, 2018: Acta Neurologica Scandinavica
https://www.readbyqxmd.com/read/29344932/mothers-early-mind-mindedness-predicts-educational-attainment-in-socially-and-economically-disadvantaged-british-children
#8
Elizabeth Meins, Charles Fernyhough, Luna C M Centifanti
Relations between mothers' mind-mindedness (appropriate and nonattuned mind-related comments) at 8 months (N = 206), and children's educational attainment at ages 7 (n = 158) and 11 (n = 156) were investigated in a British sample. Appropriate mind-related comments were positively correlated with reading and mathematics performance at both ages but only in the low-socioeconomic status (SES) group. Path analyses showed that in the low-SES group, appropriate mind-related comments directly predicted age-11 reading performance, with age-4 verbal ability mediating the relation between appropriate mind-related comments and age-7 reading...
January 18, 2018: Child Development
https://www.readbyqxmd.com/read/29344166/identification-and-functional-analysis-of-risk-related-micrornas-for-the-prognosis-of-patients-with-bladder-urothelial-carcinoma
#9
Ji Gao, Hongyan Li, Lei Liu, Lide Song, Yanting Lv, Yuping Han
The aim of the present study was to investigate risk-related microRNAs (miRs) for bladder urothelial carcinoma (BUC) prognosis. Clinical and microRNA expression data downloaded from the Cancer Genome Atlas were utilized for survival analysis. Risk factor estimation was performed using Cox's proportional regression analysis. A microRNA-regulated target gene network was constructed and presented using Cytoscape. In addition, the Database for Annotation, Visualization and Integrated Discovery was used for Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes pathway enrichment, followed by protein-protein interaction (PPI) network analysis...
December 2017: Oncology Letters
https://www.readbyqxmd.com/read/29344002/the-journey-from-clinician-to-undergraduate-medical-educator-involves-four-patterns-of-transformation
#10
Efrain Riveros-Perez, Jorge Rodriguez-Diaz
Objectives: Traditionally, teaching is part of a clinician's job. Some practitioners recognize the teaching activity as rewarding. This study explored the ways clinical practitioners experience their journey from clinicians to medical teachers, analyzing their prior experiences of teaching and learning, conceptions of good teaching and learning, perceptions of learning environments, and finally, how those factors influence their approaches to teaching. Methods: Data for phenomenographic analysis were collected through semi-structured interviews conducted in Spanish and administered to twelve clinical teachers in three medical schools in Colombia...
2018: Advances in Medical Education and Practice
https://www.readbyqxmd.com/read/29343889/first-two-bilateral-hand-transplantations-in-india-part-1-from-vision-to-reality
#11
Subramania Iyer, Mohit Sharma, P Kishore, Jimmy Mathew, Sundeep Vijayaraghavan, Janarthanan Ramu, Abhijeet Wakure, Raghuveer Reddy, S M Mali Chetan, Visakh Varma, Ashish Chaudhari, Swapnil Dhake, Akshay Omkumar, V G Prasad
Introduction: Vascularized composite tissue allotransplantation is a relatively new concept, which was unavailable in the Indian subcontinent till a bilateral hand transplant was carried out successfully in January 2015. Materials and Methods: The setting up of the transplant programme involved obtaining legal clearances, creating public awareness, harnessing the institutional facilities, drawing up protocols, assembling the surgical team, managing immunological issues, rehabilitation and preparing the ancillary services...
May 2017: Indian Journal of Plastic Surgery: Official Publication of the Association of Plastic Surgeons of India
https://www.readbyqxmd.com/read/29343874/-mental-health-recovery-star-features-and-validation-study-of-the-italian-version
#12
Anna Placentino, Fabio Lucchi, Gianpaolo Scarsato, Giuseppe Fazzari
AIM: Mental Health Recovery Star (MHRS) is an instrument that helps to assess recovery processes of mental health patients through a collaborative approach. The aim of the study is to describe the features of the instrument and to report the results of the Italian validation study. METHODS: The study involved 117 users which were evaluated in two phases. Besides MRHS, HoNOS, WHOQoL-brief, GAF were used. Acceptability for users and key-workers of the instruments and its main psychometric properties, as test-retes (ICC) and concurrent validity (Pearson's correlation coefficient), were evaluated...
November 2017: Rivista di Psichiatria
https://www.readbyqxmd.com/read/29343594/strong-social-relationships-are-associated-with-decreased-longevity-in-a-facultatively-social-mammal
#13
Daniel T Blumstein, Dana M Williams, Alexandra N Lim, Svenja Kroeger, Julien G A Martin
Humans in strong social relationships are more likely to live longer because social relationships may buffer stressors and thus have protective effects. However, a shortcoming of human studies is that they often rely on self-reporting of these relationships. By contrast, observational studies of non-human animals permit detailed analyses of the specific nature of social relationships. Thus, discoveries that some social animals live longer and healthier lives if they are involved in social grooming, forage together or have more affiliative associates emphasizes the potential importance of social relationships on health and longevity...
January 31, 2018: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/29342875/the-detection-of-burn-through-weld-defects-using-noncontact-ultrasonics
#14
Zeynab Abbasi, Donald Yuhas, Lu Zhang, Alexandra-Del-Carmen Basantes, Niloofar Nabili Tehrani, Didem Ozevin, Ernesto Indacochea
Nearly all manufactured products in the metal industry involve welding. The detection and correction of defects during welding improve the product reliability and quality, and prevent unexpected failures. Nonintrusive process control is critical for avoiding these defects. This paper investigates the detection of burn-through damage using noncontact, air-coupled ultrasonics, which can be adapted to the immediate and in-situ inspection of welded samples. The burn-through leads to a larger volume of degraded weld zone, providing a resistance path for the wave to travel which results in lower velocity, energy ratio, and amplitude...
January 13, 2018: Materials
https://www.readbyqxmd.com/read/29342287/to-the-brain-and-back-migratory-paths-of-dendritic-cells-in-multiple-sclerosis
#15
Maxime De Laere, Zwi N Berneman, Nathalie Cools
Migration of dendritic cells (DC) to the central nervous system (CNS) is a critical event in the pathogenesis of multiple sclerosis (MS). While up until now, research has mainly focused on the transmigration of DC through the blood-brain barrier, experimental evidence points out that also the choroid plexus and meningeal vessels represent important gateways to the CNS, especially in early disease stages. On the other hand, DC can exit the CNS to maintain immunological tolerance to patterns expressed in the CNS, a process that is perturbed in MS...
January 12, 2018: Journal of Neuropathology and Experimental Neurology
https://www.readbyqxmd.com/read/29342218/cross-lagged-structural-equation-models-for-the-relationship-between-health-related-state-and-behaviours-and-body-bullying-in-adolescence-findings-from-longitudinal-study-elana
#16
Viviane S Straatmann, Ylva B Almquist, Aldair J Oliveira, Mikael Rostila, Claudia S Lopes
We investigated the stability and the directionality of being body bullied and a set of four variables- 1) Body Mass Index (BMI), 2) moderate and vigorous physical activity (MVPA), 3) television time (TV) and 4) video game/computer time (VG)-, termed in the present study as 'health-related state and behaviours (HRSB)'-across adolescence. The Adolescent Nutritional Assessment Longitudinal Study (ELANA) is a cohort study conducted among middle school students from two public and four private schools in Rio de Janeiro-Brazil...
2018: PloS One
https://www.readbyqxmd.com/read/29341913/characterisation-of-pore-structures-of-pharmaceutical-tablets-a-review
#17
REVIEW
Daniel Markl, Alexa Strobel, Rüdiger Schlossnikl, Johan Bøtker, Prince Bawuah, Cathy Ridgway, Jukka Rantanen, Thomas Rades, Patrick Gane, Kai-Erik Peiponen, J Axel Zeitler
Traditionally, the development of a new solid dosage form is formulation-driven and less focus is put on the design of a specific microstructure for the drug delivery system. However, the compaction process particularly impacts the microstructure, or more precisely, the pore architecture in a pharmaceutical tablet. Besides the formulation, the pore structure is a major contributor to the overall performance of oral solid dosage forms as it directly affects the liquid uptake rate, which is the very first step of the dissolution process...
January 13, 2018: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/29341779/mesoscopic-transport-in-electrostatically-defined-spin-full-channels-in-quantum-hall-ferromagnets
#18
Aleksandr Kazakov, George Simion, Yuli Lyanda-Geller, Valery Kolkovsky, Zbigniew Adamus, Grzegorz Karczewski, Tomasz Wojtowicz, Leonid P Rokhinson
In this work, we use electrostatic control of quantum Hall ferromagnetic transitions in CdMnTe quantum wells to study electron transport through individual domain walls (DWs) induced at a specific location. These DWs are formed due to the hybridization of two counterpropagating edge states with opposite spin polarization. Conduction through DWs is found to be symmetric under magnetic field direction reversal, consistent with the helical nature of these DWs. We observe that long domain walls are in the insulating regime with a localization length of 4-6  μm...
July 28, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/29341757/deconstructing-temperature-gradients-across-fluid-interfaces-the-structural-origin-of-the-thermal-resistance-of-liquid-vapor-interfaces
#19
Jordan Muscatello, Enrique Chacón, Pedro Tarazona, Fernando Bresme
The interfacial thermal resistance determines condensation-evaporation processes and thermal transport across material-fluid interfaces. Despite its importance in transport processes, the interfacial structure responsible for the thermal resistance is still unknown. By combining nonequilibrium molecular dynamics simulations and interfacial analyses that remove the interfacial thermal fluctuations we show that the thermal resistance of liquid-vapor interfaces is connected to a low density fluid layer that is adsorbed at the liquid surface...
July 28, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/29341708/high-precision-probe-of-the-fully-sequential-decay-width-of-the-hoyle-state-in-12-c
#20
D Dell'Aquila, I Lombardo, G Verde, M Vigilante, L Acosta, C Agodi, F Cappuzzello, D Carbone, M Cavallaro, S Cherubini, A Cvetinovic, G D'Agata, L Francalanza, G L Guardo, M Gulino, I Indelicato, M La Cognata, L Lamia, A Ordine, R G Pizzone, S M R Puglia, G G Rapisarda, S Romano, G Santagati, R Spartà, G Spadaccini, C Spitaleri, A Tumino
The decay path of the Hoyle state in ^{12}C (E_{x}=7.654  MeV) has been studied with the ^{14}N(d,α_{2})^{12}C(7.654) reaction induced at 10.5 MeV. High resolution invariant mass spectroscopy techniques have allowed us to unambiguously disentangle direct and sequential decays of the state passing through the ground state of ^{8}Be. Thanks to the almost total absence of background and the attained resolution, a fully sequential decay contribution to the width of the state has been observed. The direct decay width is negligible, with an upper limit of 0...
September 29, 2017: Physical Review Letters
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