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https://www.readbyqxmd.com/read/28346377/impact-of-beamforming-on-the-path-connectivity-in-cognitive-radio-ad-hoc-networks
#1
Le The Dung, Tran Dinh Hieu, Seong-Gon Choi, Byung-Seo Kim, Beongku An
This paper investigates the impact of using directional antennas and beamforming schemes on the connectivity of cognitive radio ad hoc networks (CRAHNs). Specifically, considering that secondary users use two kinds of directional antennas, i.e., uniform linear array (ULA) and uniform circular array (UCA) antennas, and two different beamforming schemes, i.e., randomized beamforming and center-directed to communicate with each other, we study the connectivity of all combination pairs of directional antennas and beamforming schemes and compare their performances to those of omnidirectional antennas...
March 27, 2017: Sensors
https://www.readbyqxmd.com/read/28290353/image-interpretation-performance-a-longitudinal-study-from-novice-to-professional
#2
C Wright, P Reeves
PURPOSE: Universities need to deliver educational programmes that create radiography graduates who are ready and able to participate in abnormality detection schemes, ultimately delivering safe and reliable performance because junior doctors are exposed to the risk of misdiagnosis if unsupported by other healthcare professionals. Radiographers are ideally suited to this role having the responsibility for conducting the actual X-ray examination. METHOD: The image interpretation performance of one cohort of student radiographers was measured upon enrolment from UCAS in the first week of university education and then again prior to graduation using RadBench (n = 23)...
February 2017: Radiography
https://www.readbyqxmd.com/read/28282792/effects-of-kinesio-taping-and-exercise-on-forward-head-posture
#3
Hsu-Sheng Shih, Shu-Shi Chen, Su-Chun Cheng, Hsun-Wen Chang, Pei-Rong Wu, Jin-Shiou Yang, Yi-Shuang Lee, Jui-Yi Tsou
BACKGROUND: Little is known about the effects of Kinesio taping and therapeutic exercise on correcting forward head posture. OBJECTIVE: To compare Kinesio taping versus therapeutic exercise for forward head posture on static posture, dynamic mobility and functional outcomes. METHODS: Sixty subjects (31 women, 29 men) with forward head postures participated in this study. They were randomly assigned to either one of the three groups: (1) exercise group (n = 20), (2) taping group (n = 20), and (3) control groups (n = 20)...
March 3, 2017: Journal of Back and Musculoskeletal Rehabilitation
https://www.readbyqxmd.com/read/28280560/territorial-battles-between-fiddler-crab-species
#4
H L Clark, P R Y Backwell
Many species worldwide are impacted by habitat loss. This may result in increased competition both within species and between species. Many studies have demonstrated that when two previously non-overlapping species are forced to compete over a resource, one species is likely to become dominant over the other. This study explores the impact a larger species of fiddler crab (Tabuca elegans-previously known as Uca elegans) has when invading an area previously used solely by a smaller species (Austruca mjoebergi-previously known as Uca mjoebergi)...
January 2017: Royal Society Open Science
https://www.readbyqxmd.com/read/28277277/immunoregulation-of-dendritic-cell-subsets-by-inhibitory-receptors-in-urothelial-cancer
#5
Mathieu F Chevalier, Perrine Bohner, Claire Pieraerts, Benoit Lhermitte, Jolanta Gourmaud, Antoine Nobile, Samuel Rotman, Valerie Cesson, Virginie Martin, Anne-Sophie Legris, Florence Dartiguenave, Dalila Gharbi, Laurence De Leval, Daniel E Speiser, Denise Nardelli-Haefliger, Patrice Jichlinski, Laurent Derré
Blockade of inhibitory receptors (IRs) overexpressed by T cells can activate antitumor immune responses, resulting in the most promising therapeutic approaches, particularly in bladder cancer, currently able to extend patient survival. Thanks to their ability to cross-present antigens to T cells, dendritic cells (DCs) are an immune cell population that plays a central role in the generation of effective antitumor T-cell responses. While IR function and expression have been investigated in T cells, very few data are available for DCs...
October 27, 2016: European Urology
https://www.readbyqxmd.com/read/28271274/split-bolus-ct-urogram-is-less-more
#6
Hiram Shaish, Jeffrey H Newhouse
PURPOSE: To determine the accuracy of split-bolus CT urogram (SB-CTU) without special maneuvers for ureteral distention in diagnosing upper urinary tract urothelial carcinoma (UCA). MATERIALS AND METHODS: A hospital database was searched from 1/1/10, to 9/1/15, for SB-CTU exams without special maneuvers for ureteral distention. Accuracy of SB-CTU for detecting upper and lower urinary tract UCA was computed by comparing the prospective radiology report with cystoscopy, ureteroscopy, and/or urologic clinical follow-up...
March 7, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28271159/inflow-hemodynamics-evaluated-by-using-four-dimensional-flow-magnetic-resonance-imaging-and-the-size-ratio-of-unruptured-cerebral-aneurysms
#7
Kazuya Futami, Iku Nambu, Tomohiro Kitabayashi, Hiroki Sano, Kouichi Misaki, Naoyuki Uchiyama, Mitsutoshi Nakada
PURPOSE: Prediction of the rupture risk is critical for the identification of unruptured cerebral aneurysms (UCAs) eligible for invasive treatments. The size ratio (SR) is a strong morphological predictor for rupture. We investigated the relationship between the inflow hemodynamics evaluated on four-dimensional (4D) flow magnetic resonance (MR) imaging and the SR to identify specific characteristics related to UCA rupture. METHODS: We evaluated the inflow jet patterns and inflow hemodynamic parameters of 70 UCAs on 4D flow MR imaging and compared them among 23 aneurysms with an SR ≧2...
March 7, 2017: Neuroradiology
https://www.readbyqxmd.com/read/28266925/an-iterative-fullwave-simulation-approach-to-multiple-scattering-in-media-with-randomly-distributed-microbubbles
#8
Aditya Joshi, Brooks Lindsey, Paul Dayton, Gianmarco Pinton, Marie Muller
- Ultrasound contrast agents (UCA), such as microbubbles, enhance the scattering properties of blood, which is otherwise hypoechoic. The multiple scattering interactions of the acoustic field with UCA's are poorly understood due to the complexity of the multiple scattering theories and the nonlinear microbubble response. The majority of bubble models describe the behavior of UCA's as single, isolated microbubbles suspended in infinite medium. Multiple scattering models such as the Independent Scattering Approximation can approximate phase velocity and attenuation for low scatterer volume fraction...
March 7, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28198322/nursingstandard-com
#9
(no author information available yet)
1 The number of applicants from England making at least one choice for a nursing course fell by 10,000, data released by the Universities and Colleges Admissions Service revealed. The RCN said it 'consistently warned' the government that removing the bursary would result in fewer applications. Read more: rcni.com/ucas-figures.
February 15, 2017: Nursing Standard
https://www.readbyqxmd.com/read/28184060/do-high-tuition-fees-make-a-difference-characteristics-of-applicants-to-uk-medical-and-dental-schools-before-and-after-the-introduction-of-high-tuition-fees-in-2012
#10
J E Gallagher, A Calvert, V Niven, L Cabot
Aim To compare trends in the volume, socio-demography and academic experience of UK applicants and entrants to medicine and dentistry in the UK with university in general, before and after the major increase in university fees in England in 2012.Methods Descriptive trend analyses of University and College Admissions Services (UCAS) data for focused (preferred subject was medicine or dentistry) and accepted applicants, 2010-14, compared with university in general in relation to socio-demography (age, sex, ethnicity, POLAR 2, region) and academic experience (school type)...
February 10, 2017: British Dental Journal
https://www.readbyqxmd.com/read/28182764/phylogenetic-patterns-and-the-adaptive-evolution-of-osmoregulation-in-fiddler-crabs-brachyura-uca
#11
Samuel Coelho Faria, Diogo Borges Provete, Carl Leo Thurman, John Campbell McNamara
Salinity is the primary driver of osmoregulatory evolution in decapods, and may have influenced their diversification into different osmotic niches. In semi-terrestrial crabs, hyper-osmoregulatory ability favors sojourns into burrows and dilute media, and provides a safeguard against hemolymph dilution; hypo-osmoregulatory ability underlies emersion capability and a life more removed from water sources. However, most comparative studies have neglected the roles of the phylogenetic and environmental components of inter-specific physiological variation, hindering evaluation of phylogenetic patterns and the adaptive nature of osmoregulatory evolution...
2017: PloS One
https://www.readbyqxmd.com/read/28113618/uniform-projection-for-multi-view-learning
#12
Zhenyue Zhang, Zheng Zhai, Limin Li
Multi-view learning aims to integrate multiple data information from different views to improve the learning performance. The key problem is to handle the unconformities or distortions among viewspecific samples or measurements of similarity or dissimilarity. This paper models the view-specific samples as a nonlinear mapping of uniform but latent intact samples for all the views, and the viewspecific dissimilarity matrices or similarity matrices are estimated in terms of the uniform latent one. Two methods are then developed for multi-view clustering...
August 19, 2016: IEEE Transactions on Pattern Analysis and Machine Intelligence
https://www.readbyqxmd.com/read/28113312/microbubble-composition-and-preparation-for-high-frequency-contrast-enhanced-ultrasound-imaging-in-vitro-and-in-vivo-evaluation
#13
Verya Daeichin, Tom van Rooij, Ilya Skachkov, Bulent Ergin, Patricia A C Specht, Alexandre Lima, Can Ince, Johan G Bosch, Antonius F W van der Steen, Nico de Jong, Klazina Kooiman
Although high-frequency ultrasound imaging is gaining attention in various applications, hardly any ultrasound contrast agents (UCAs) dedicated to such frequencies (>15 MHz) are available for contrast-enhanced ultrasound (CEUS) imaging. Moreover, the composition of the limited commercially available UCAs for high-frequency CEUS (hfCEUS) is largely unknown, while shell properties have been shown to be an important factor for their performance. The aim of our study was to produce UCAs in-house for hfCEUS. Twelve different UCA formulations A-L were made by either sonication or mechanical agitation...
March 2017: IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
https://www.readbyqxmd.com/read/28056806/suppression-of-experimental-autoimmune-encephalomyelitis-by-ultraviolet-light-is-not-mediated-by-isomerization-of-urocanic-acid
#14
Amy A Irving, Steven J Marling, Lori A Plum, Hector F DeLuca
BACKGROUND: Ultraviolet B irradiation confers strong resistance against experimental autoimmune encephalomyelitis, a model of multiple sclerosis. This protection by ultraviolet B is independent of vitamin D production but causes isomerization of urocanic acid, a naturally occurring immunosuppressant. METHODS: To determine whether UCA isomerization from trans to cis is responsible for the protection against experimental autoimmune encephalomyelitis afforded by ultraviolet B, trans- or cis-urocanic acid was administered to animals and their disease progression was monitored...
January 5, 2017: BMC Neuroscience
https://www.readbyqxmd.com/read/28055026/anterior-uterocervical-angle-measurement-improves-prediction-of-cerclage-failure
#15
J C Knight, E Tenbrink, J Sheng, A S Patil
OBJECTIVE: To compare the anterior uterocervical angle and cervical length as predictors of spontaneous preterm delivery in patients with transvaginal cerclage. STUDY DESIGN: We retrospectively evaluated a cohort of 142 pregnant women with transvaginal cerclage placed over a 5-year period (2010 to 2015) were evaluated. Cervical morphology characteristics were measured from endovaginal imaging, including cervical length, cerclage height, funnel volume and anterior uterocervical angle prior to cerclage placement (UCA 1), shortly after cerclage placement (UCA 2) and the last image prior to delivery (UCA 3)...
January 5, 2017: Journal of Perinatology: Official Journal of the California Perinatal Association
https://www.readbyqxmd.com/read/28052386/ecosystem-engineers-drive-creek-formation-in-salt-marshes
#16
Huy D Vu, Kazimierz Wie Ski, Steven C Pennings
Ecosystem engineers affect different organisms and processes in multiple ways at different spatial scales. Moreover, similar species may differ in their engineering effects for reasons that are not always clear. We examined the role of four species of burrowing crabs (Sesarma reticulatum, Eurytium limosum, Panopeus herbstii, Uca pugnax) in engineering tidal creek networks in salt marshes experiencing sea level rise. In the field, crab burrows were associated with heads of eroding creeks and the loss of plant (Spartina alterniflora) stems...
January 2017: Ecology
https://www.readbyqxmd.com/read/28050135/the-risk-of-colorectal-cancer-is-not-increased-after-a-diagnosis-of-urothelial-cancer-a-population-based-study
#17
C H Harlos, H Singh, Z Nugent, A Demers, S M Mahmud, P M Czaykowski
BACKGROUND: The data about whether patients with a prior urothelial cancer (uca) are at increased risk of colorectal cancer (crc) are conflicting. We used a competing risks analysis to determine the risk of crc after uca. METHODS: Historical cohorts were assembled by record linkage of Manitoba Cancer Registry and Manitoba Health databases. The incidence of crc for individuals with uca as their first cancer between 1987 and 2009 was compared with the incidence for randomly selected age-and sex-matched individuals without a cancer diagnosis at the index date (uca diagnosis date)...
December 2016: Current Oncology
https://www.readbyqxmd.com/read/28044473/synthesis-characterization-and-in-vitro-evaluation-of-targeted-gold-nanoshelled-poly-d-l-lactide-co-glycolide-nanoparticles-carrying-anti-p53-antibody-as-a-theranostic-agent-for-ultrasound-contrast-imaging-and-photothermal-therapy
#18
Li Xu, Caifeng Wan, Jing Du, Hongli Li, Xuesong Liu, Hong Yang, Fenghua Li
Breast cancer is the leading cause of cancer-related deaths in women and earlier detection can substantially reduce deaths from breast cancer. Polymers with targeted ligands are widely used in the field of molecular ultrasound imaging and targeted tumor therapy. In our study, the nanotheranostic agent was fabricated through filling perfluoropropane (C3F8) into poly(d,l-lactic-co-glycolic acid) nanoparticles (PLGA NPs), followed by the formation of gold nanoshell on the surface, then conjugated with anti p53 antibody which has high specificity with the p53 protein overexpressing in breast cancer...
January 16, 2017: Journal of Biomaterials Science. Polymer Edition
https://www.readbyqxmd.com/read/28000971/safety-and-tolerability-of-sonovue%C3%A2-in-patients-with-large-artery-anterior-circulation-acute-stroke
#19
Claudio Baracchini, Federica Viaro, Silvia Favaretto, Anna Palmieri, Caterina Kulyk, Francesco Causin, Filippo Farina, Enzo Ballotta
BACKGROUND AND PURPOSE: Ultrasound contrast agents (UCAs) are routinely used to improve the visualization of intracranial arteries. Since a higher rate of intracranial hemorrhage (ICH) has been observed in patients undergoing sonothrombolysis in combination with UCAs, we conducted this study with the aim of assessing safety and tolerability of SonoVue® in patients with acute ischemic stroke due to anterior circulation large artery occlusion (LAO) and eligible to intravenous thrombolysis and/or mechanical thrombectomy...
December 21, 2016: Journal of Neuroimaging: Official Journal of the American Society of Neuroimaging
https://www.readbyqxmd.com/read/27990422/premature-destruction-of-microbubbles-during-voiding-urosonography-in-children-and-possible-underlying-mechanisms-post-hoc-analysis-from-the-prospective-study
#20
Maciej Piskunowicz, Dominik Swieton, Dorota Rybczynska, Arkadiusz Szarmach, Edyta Szurowska, Menno Pruijm
The aim of this study is to describe premature microbubbles destruction with contrast-enhanced voiding urosonography (ce-VUS) in children using 2nd-generation ultrasound contrast agents (UCA) and to hypothesize about the reason. 141 children (61 females and 80 males) were included in the study, with mean age of 3.3 years (range 4 weeks-16.0 years), who underwent ce-VUS examination between 2011 and 2014. Premature destruction of the microbubbles in the urinary bladder during ce-VUS was observed in 11 children (7...
2016: BioMed Research International
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