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https://www.readbyqxmd.com/read/28916819/continuous-beam-steering-through-broadside-using-asymmetrically-modulated-goubau-line-leaky-wave-antennas
#1
Xiao-Lan Tang, Qingfeng Zhang, Sanming Hu, Yaqiang Zhuang, Abhishek Kandwal, Ge Zhang, Yifan Chen
Goubau line is a single-conductor transmission line, featuring easy integration and low-loss transmission properties. Here, we propose a periodic leaky-wave antenna (LWA) based on planar Goubau transmission line on a thin dielectric substrate. The leaky-wave radiations are generated by introducing periodic modulations along the Goubau line. In this way, the surface wave, which is slow-wave mode supported by the Goubau line, achieves an additional momentum and hence enters the fast-wave region for radiations...
September 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28916440/white-matter-microstructure-within-the-superior-longitudinal-fasciculus-modulates-the-degree-of-response-conflict-indexed-by-n2-in-healthy-adults
#2
Shudan Gao, Peng Liu, Jialu Guo, Yuanqiang Zhu, Peng Liu, Jinbo Sun, Xuejuan Yang, Wei Qin
Response conflict can be induced by priming multiple responses competing for control of action in trials. The N2 is one functionally-related cognitive control index for response conflict. And yet the underlying whiter matter neural substrates of inter-individual difference in conflict N2 remain unclear. So the aim of present study was to address the white matter microstructure of the N2 responsible for conflict by directly relating the amplitude cost of the event-related potential (ERP) N2 component to diffusion tensor imaging (DTI) indices in healthy subjects...
September 12, 2017: Brain Research
https://www.readbyqxmd.com/read/28914724/the-role-of-brain-structure-in-predicting-adherence-to-a-physical-activity-regimen
#3
Swathi Gujral, Edward McAuley, Lauren E Oberlin, Arthur F Kramer, Kirk I Erickson
OBJECTIVE: Physical activity is important for maintaining health throughout the lifespan. However, adherence to PA regimens is poor with approximately 50% of older adults terminating activity intervention programs within 6 months. In this study we tested whether gray matter volume and white matter microstructural integrity prior to the initiation of a PA intervention predicts PA adherence. METHODS: 159 adults aged 60-80 years were randomly assigned to a moderate-intensity aerobic walking condition or a non-aerobic stretching and toning condition...
September 13, 2017: Psychosomatic Medicine
https://www.readbyqxmd.com/read/28912866/compositional-analysis-of-various-layers-of-upper-urinary-tract-stones-by-infrared-spectroscopy
#4
Zhang He, Zhang Jing, Zheng Jing-Cun, Hu Chuan-Yi, Gao Fei
The objective of the present study was to determine the composition of various layers of upper urinary stones and assess the mechanisms of stone nucleation and aggregation. A total of 40 integrated urinary tract stones with a diameter of >0.8 cm were removed from the patients. All of the stones were cut in half perpendicularly to the longitudinal axis. Samples were selected from nuclear, internal and external layers of each stone. Fourier transform infrared spectroscopy (FT-IR) was adopted for qualitative and quantitative analysis of all of the fragments and compositional differences among nuclear, internal and external layers of various types of stone were subsequently investigated...
October 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28911133/kisspeptin-is-a-novel-regulator-of-human-fetal-adrenocortical-development-and-function-a-finding-with-important-implications-for-the-human-fetoplacental-unit
#5
Harshini Katugampola, Peter J King, Sumana Chatterjee, Muriel Meso, Andrew J Duncan, John C Achermann, Leo Guasti, Lea Ghataore, Norman F Taylor, Rebecca Allen, Shemoon Marlene, Joseph Aquilina, Ali Abbara, Channa N Jaysena, Waljit S Dhillo, Leo Dunkel, Ulla Sankilampi, Helen L Storr
Context: The human fetal adrenal (HFA) is an integral component of the fetoplacental unit and important for the maintenance of pregnancy. Low kisspeptin levels during pregnancy are associated with miscarriage, and kisspeptin and its receptor are expressed in the HFA. However, the role of kisspeptin in fetal adrenal function remains unknown. Objective: To determine the role of kisspeptin in the developing HFA. Design: Experiments using H295R and primary HFA cells as in vitro models of the fetal adrenal...
September 1, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28910363/impaired-bone-formation-in-ovariectomized-mice-reduces-implant-integration-as-indicated-by-longitudinal-in-vivo-micro-computed-tomography
#6
Zihui Li, Gisela Kuhn, Michael Schirmer, Ralph Müller, Davide Ruffoni
Although osteoporotic bone, with low bone mass and deteriorated bone architecture, provides a less favorable mechanical environment than healthy bone for implant fixation, there is no general agreement on the impact of osteoporosis on peri-implant bone (re)modeling, which is ultimately responsible for the long term stability of the bone-implant system. Here, we inserted an implant in a mouse model mimicking estrogen deficiency-induced bone loss and we monitored with longitudinal in vivo micro-computed tomography the spatio-temporal changes in bone (re)modeling and architecture, considering the separate contributions of trabecular, endocortical and periosteal surfaces...
2017: PloS One
https://www.readbyqxmd.com/read/28910328/non-governmental-organization-facilitation-of-a-community-based-nutrition-and-health-program-effect-on-program-exposure-and-associated-infant-feeding-practices-in-rural-india
#7
Veena Singh, Saifuddin Ahmed, Michele L Dreyfuss, Usha Kiran, Deepika N Chaudhery, Vinod K Srivastava, Ramesh C Ahuja, Abdullah H Baqui, Gary L Darmstadt, Mathuram Santosham, Keith P West
BACKGROUND: Integrated nutrition and health programs seek to reduce undernutrition by educating child caregivers about infant feeding and care. Data on the quality of program implementation and consequent effects on infant feeding practices are limited. This study evaluated the effectiveness of enhancing a nutrition and health program on breastfeeding and complementary-feeding practices in rural India. METHODS: Utilizing a quasi-experimental design, one of the implementing districts of a Cooperative for Assistance and Relief Everywhere (CARE) nutrition and health program was randomly selected for enhanced services and compared with a district receiving the Government of India's standard nutrition and health package alone...
2017: PloS One
https://www.readbyqxmd.com/read/28905109/white-matter-microstructure-of-attentional-networks-predicts-attention-and-consciousness-functional-interactions
#8
Ana B Chica, Michel Thiebaut de Schotten, Paolo Bartolomeo, Pedro M Paz-Alonso
Attention is considered as one of the pre-requisites of conscious perception. Phasic alerting and exogenous orienting improve conscious perception of near-threshold information through segregated brain networks. Using a multimodal neuroimaging approach, combining data from functional MRI (fMRI) and diffusion-weighted imaging (DWI), we investigated the influence of white matter properties of the ventral branch of superior longitudinal fasciculus (SLF III) in functional interactions between attentional systems and conscious perception...
September 13, 2017: Brain Structure & Function
https://www.readbyqxmd.com/read/28903661/social-identification-in-sports-teams-the-role-of-personal-social-and-collective-identity-motives
#9
William E Thomas, Rupert Brown, Matthew J Easterbrook, Vivian L Vignoles, Claudia Manzi, Chiara D'Angelo, Jeremy J Holt
Based on motivated identity construction theory (MICT; Vignoles, 2011), we offer an integrative approach examining the combined roles of six identity motives (self-esteem, distinctiveness, belonging, meaning, continuity, and efficacy) instantiated at three different motivational levels (personal, social, and collective identity) as predictors of group identification. These identity processes were investigated among 369 members of 45 sports teams from England and Italy in a longitudinal study over 6 months with four time points...
April 2017: Personality & Social Psychology Bulletin
https://www.readbyqxmd.com/read/28903596/changes-in-self-representations-following-psychoanalytic-psychotherapy-for-young-adults-a-comparative-typology
#10
Andrzej Werbart, Lars Brusell, Rebecka Iggedal, Kristin Lavfors, Alexander Widholm
Changes in dynamic psychological structures are often a treatment goal in psychotherapy. The present study aimed at creating a typology of self-representations among young women and men in psychoanalytic psychotherapy, to study longitudinal changes in self-representations, and to compare self-representations in the clinical sample with those of a nonclinical group. Twenty-five women and sixteen men were interviewed according to Blatt's Object Relations Inventory pretreatment, at termination, and at a 1.5-year follow-up...
October 2016: Journal of the American Psychoanalytic Association
https://www.readbyqxmd.com/read/28902466/learning-based-deformable-registration-for-infant-mri-by-integrating-random-forest-with-auto-context-model
#11
Lifang Wei, Xiaohuan Cao, Zhensong Wang, Yaozong Gao, Shunbo Hu, Li Wang, Guorong Wu, Dinggang Shen
PURPOSE: Accurately analyzing the rapid structural evolution of human brain in the first year of life is a key step in early brain development studies, which requires accurate deformable image registration. However, due to 1) dynamic appearance and 2) large anatomical changes, very few methods in the literature can work well for the registration of two infant brain MR images acquired at two arbitrary development phases, such as birth and one-year-old. METHODS: To address these challenging issues, we propose a learning-based registration method, which can handle the anatomical structures and the appearance changes between the two infant brain MR images with possible time gap...
September 13, 2017: Medical Physics
https://www.readbyqxmd.com/read/28899758/chronic-global-analysis-of-vascular-permeability-and-cerebral-blood-flow-after-bone-marrow-stromal-cell-treatment-of-traumatic-brain-injury-in-the-rat-a-long-term-mri-study
#12
Lian Li, Michael Chopp, Guangliang Ding, Qingjiang Li, Asim Mahmood, Quan Jiang
Vascular permeability and hemodynamic alteration in response to the transplantation of human bone marrow stromal cells (hMSCs) after traumatic brain injury (TBI) were longitudinally investigated in non directly injured and normal-appearing cerebral tissue using magnetic resonance imaging (MRI). Male Wistar rats (300-350g, n=30) subjected to controlled cortical impact TBI were intravenously injected with 1 ml of saline (at 6-hours or 1-week post-injury, n=5/group) or with hMSCs in suspension (∼3x10(6) hMSCs, at 6-hours or 1-week post-injury, n=10/group)...
September 9, 2017: Brain Research
https://www.readbyqxmd.com/read/28899757/segmentation-of-the-inferior-longitudinal-fasciculus-in-the-human-brain-a-white-matter-dissection-and-diffusion-tensor-tractography-study
#13
Francesco Latini, Johanna Mårtensson, Elna-Marie Larsson, Mats Fredrikson, Fredrik Åhs, Mats Hjortberg, Håkan Aldskogius, Mats Ryttlefors
The inferior longitudinal fascicle (ILF) is one of the major occipital-temporal association pathways. Several studies have mapped its hierarchical segmentation to specific functions. There is, however, no consensus regarding a detailed description of ILF fibre organisation. The aim of this study was to establish whether the ILF has a constant number of subcomponents. A secondary aim was to determine the quantitative diffusion proprieties of each subcomponent and assess their anatomical trajectories and connectivity patterns...
September 9, 2017: Brain Research
https://www.readbyqxmd.com/read/28899439/psychological-morbidity-and-parenting-stress-in-mothers-of-primary-school-children-by-timing-of-acquisition-of-hiv-infection-a-longitudinal-cohort-study-in-rural-south-africa
#14
T J Rochat, B Houle, A Stein, R M Pearson, M L Newell, R M Bland
Longitudinal maternal mental health data are needed from high HIV prevalence settings. The Siyakhula Cohort (SC) is a population-based cohort of HIV-positive and negative mothers (n=1506) with HIV-negative children (n=1536) from rural South Africa. SC includes 767 HIV-negative mothers; 465 HIV-positive in pregnancy; 272 HIV-positive since pregnancy (n=2 missing HIV status). A subgroup (n=890) participated in a non-randomized breastfeeding intervention [Vertical Transmission Study (VTS)]; the remaining (n=616) were resident in the same area and received antenatal care at the time of the VTS, but were not part of the VTS, instead receiving the standard of care Prevention of Mother-to-Child Transmission (PMTCT) Programme...
September 13, 2017: Journal of Developmental Origins of Health and Disease
https://www.readbyqxmd.com/read/28898753/efficiency-of-a-nature-like-bypass-channel-for-restoring-longitudinal-connectivity-for-a-river-resident-population-of-brown-trout
#15
Jamie R Dodd, Ian G Cowx, Jonathan D Bolland
Man-made, physical barriers have disrupted longitudinal connectivity for migratory fish in many river systems throughout the world for centuries. These barriers are considered to be a key reason for the decline of many fish species in river systems. To date, most research to ease movement of anadromous salmonids past such barriers to help dwindling populations has focused on the use of technical fishways. More recently emphasis has been placed on nature-like fishways to enable a wider range of fish species to bypass these barriers, but few studies have examined their efficacy...
September 9, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28895680/optimising-preconception-health-in-women-of-reproductive-age
#16
Adina Y Lang, Jacqueline A Boyle, Grace Fitzgerald, Helena Teede, Danielle Mazza, Lisa J Moran, Cheryce Harrison
There is a growing realisation that efforts to optimise the health of women and reduce the risk of adverse maternal, perinatal and neonatal outcomes during pregnancy should commence in the preconception period. The preconception period (prior to or between pregnancies) provides an opportune time to address reproductive intentions and promote and support wellbeing and healthy behaviour change regardless of pregnancy intention. Research over the last 30 years has explored the influence of a range of preconception risk factors and determinants of health on pregnancy and maternal and neonatal outcomes including: pregnancy planning, diet and micronutrient supplementation, physical activity, weight, smoking, recreational drug and alcohol use, mental health, oral hygiene, and chronic health and medical conditions...
September 12, 2017: Minerva Ginecologica
https://www.readbyqxmd.com/read/28892966/longitudinal-stent-deformation-at-aneurysm-site-flexibility-at-the-expense-of-longitudinal-integrity
#17
Bhupesh R Shah
Longitudinal stent deformation is a recently described complication of percutaneous coronary intervention. Novel stents with thin struts and reduced number of fixed links between cells improve flexibility and deliverability but in certain cases it may reduce longitudinal strength and thereby increase the risk of longitudinal deformation. Although longitudinal deformation of coronary stents is an infrequent finding, it requires clinical attention as it may lead to catastrophic clinical outcomes. We report a case of longitudinal deformation of coronary stent observed at our institution while treating ostial lesion and aneurysm of left anterior descending artery...
July 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28892002/state-of-panax-ginseng-research-a-global-analysis
#18
REVIEW
Wanqi Xu, Hyung-Kyoon Choi, Linfang Huang
This article aims to understand the global and longitudinal trends of research on Panax ginseng. We used bibliometrics to analyze 3974 papers collected from the Web of Science(TM) Core Collection database during 1959-2016. The number of publications showed a steady growth before 2000 and exponentially increased in stage III (2000-2016, about 86% of the papers were published). Research on P. ginseng was conducted in 64 countries, mainly in Asia; in particular, 41% and 28% of the publications were from South Korea and China, respectively...
September 11, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28891655/longitudinal-intra-individual-variability-in-neuropsychological-performance-relates-to-white-matter-changes-in-hiv
#19
Jacob D Jones, Taylor Kuhn, Zanjbeel Mahmood, Elyse J Singer, Charles H Hinkin, April D Thames
OBJECTIVES: Recent studies suggest that intraindividual variability (IIV) of neuropsychological performance may be sensitive to HIV-associated neurologic compromise. IIV may be particularly dependent upon the integrity of frontal-subcortical systems, and therefore may be a meaningful phenotype in HIV. We examined the relationship between change in IIV and white matter integrity among HIV seropositive (HIV+) and HIV seronegative (HIV-) individuals. METHOD: The sample consisted of 38 HIV+ participants and 26 HIV- control participants who underwent neuroimaging and a neuropsychological evaluation at baseline and at 2-year follow-up evaluation...
September 11, 2017: Neuropsychology
https://www.readbyqxmd.com/read/28890807/social-network-decay-as-potential-recovery-from-homelessness-a-mixed-methods-study-in-housing-first-programming
#20
Elizabeth Golembiewski, Dennis P Watson, Lisa Robison, John W Coberg
The positive relationship between social support and mental health has been well documented, but individuals experiencing chronic homelessness face serious disruptions to their social networks. Housing First (HF) programming has been shown to improve health and stability of formerly chronically homeless individuals. However, researchers are only just starting to understand the impact HF has on residents' individual social integration. The purpose of the current study was to describe and understand changes in social networks of residents living in a HF program...
September 2017: Social Sciences
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