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https://www.readbyqxmd.com/read/28098841/compressed-sensing-techniques-applied-to-ultrasonic-imaging-of-cargo-containers
#1
Yuri Álvarez López, José Ángel Martínez Lorenzo
One of the key issues in the fight against the smuggling of goods has been the development of scanners for cargo inspection. X-ray-based radiographic system scanners are the most developed sensing modality. However, they are costly and use bulky sources that emit hazardous, ionizing radiation. Aiming to improve the probability of threat detection, an ultrasonic-based technique, capable of detecting the footprint of metallic containers or compartments concealed within the metallic structure of the inspected cargo, has been proposed...
January 15, 2017: Sensors
https://www.readbyqxmd.com/read/28098488/pulse-wave-velocity-and-myocardial-performance-index-in-premature-ovarian-insufficiency
#2
Muhammed Necati Murat Aksoy, Nermin Akdemir, Harun Kilic, Sabiye Yilmaz, Ramazan Akdemir, Huseyin Gunduz
OBJECTIVE: Epidemiological studies suggest that women with loss of ovarian function at early ages may be especially burdened by cardiovascular disease (CVD). In this study, we aimed to evaluate pulse wave velocity and myocardial performance index in patients with premature ovarian insufficiency (POI). DESIGN: We enrolled 51 female patients (mean age 38.9 ± 6.7 years) with POI and 49 healthy subjects (mean age 36.8 ± 5.2 years). All participants underwent a detailed echocardiographic examination and pulse wave velocity (PWV) measurement which is basically the velocity of pulse wave travelling from carotid to femoral artery...
January 18, 2017: Scandinavian Cardiovascular Journal: SCJ
https://www.readbyqxmd.com/read/28098285/kb-po4-f-a-novel-acentric-deep-ultraviolet-material
#3
Ji-Hong Jiang, Lin-Chuan Zhang, Ya-Xi Huang, Zhi-Mei Sun, Yuanming Pan, Jin-Xiao Mi
Two challenges to grow KBe2BO3F2 (KBBF), the best known deep-ultraviolet nonlinear optical (NLO) material to date, are the limited crystal sizes and the use of a highly toxic element (Be). Herein we report on the discovery of a novel anhydrous non-centrosymmetric alkali fluorinated borophosphate KB(PO4)F (KBPF) featuring a cut-off wavelength of less than 200 nm and a large second-harmonic generation (SHG) effect similar to KH2PO4 (KDP), hence representing a new promising deep-ultraviolet NLO material. The KBPF crystals consisting of common elements can be grown using green and cost effective processes and do not show any detectable hygroscopicity...
January 18, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28097626/peer-mentors-delivering-a-physical-activity-intervention-for-cancer-survivors-effects-among-mentors
#4
Bernardine M Pinto, Shira Dunsiger, Kevin Stein, Chelsey Kamson
To further inform implementation efforts of a telephone-based physical activity (PA) intervention for breast cancer survivors, we assessed the PA, fatigue, mood, and quality of life of the peer mentors/coaches who delivered the program. The coaches were volunteers with the American Cancer Society's Reach to Recovery program. The coaches (n = 18) delivered the PA intervention to 76 breast cancer survivors in a randomized controlled trial. Coaches completed assessments of PA (self-report), motivational readiness for PA, and standardized measures of psychosocial variables at the start of coaching and at study exit...
January 17, 2017: Translational Behavioral Medicine
https://www.readbyqxmd.com/read/28096673/apathy-and-intrinsic-functional-connectivity-networks-in-amnestic-mild-cognitive-impairment
#5
Soo Hyun Joo, Chang Uk Lee, Hyun Kook Lim
BACKGROUND: Although several prior works reported that apathy is associated with conversion to Alzheimer's disease in individuals with amnestic mild cognitive impairment (aMCI), effects of apathy on the functional connectivity (FC) of the brain remain unclear. In this study, we assessed the pattern of association between apathy and default mode network (DMN), salience network and central executive network (CEN) in aMCI subjects. METHODS: Fifty subjects with aMCI and 50 controls (CONs) participated in this study...
2017: Neuropsychiatric Disease and Treatment
https://www.readbyqxmd.com/read/28096408/rhythm-judgments-reveal-a-frequency-asymmetry-in-the-perception-and-neural-coding-of-sound-synchrony
#6
Magdalena Wojtczak, Anahita H Mehta, Andrew J Oxenham
In modern Western music, melody is commonly conveyed by pitch changes in the highest-register voice, whereas meter or rhythm is often carried by instruments with lower pitches. An intriguing and recently suggested possibility is that the custom of assigning rhythmic functions to lower-pitch instruments may have emerged because of fundamental properties of the auditory system that result in superior time encoding for low pitches. Here we compare rhythm and synchrony perception between low- and high-frequency tones, using both behavioral and EEG techniques...
January 17, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28096395/genomic-analysis-reveals-major-determinants-of-cis-regulatory-variation-in-capsella-grandiflora
#7
Kim A Steige, Benjamin Laenen, Johan Reimegård, Douglas G Scofield, Tanja Slotte
Understanding the causes of cis-regulatory variation is a long-standing aim in evolutionary biology. Although cis-regulatory variation has long been considered important for adaptation, we still have a limited understanding of the selective importance and genomic determinants of standing cis-regulatory variation. To address these questions, we studied the prevalence, genomic determinants, and selective forces shaping cis-regulatory variation in the outcrossing plant Capsella grandiflora We first identified a set of 1,010 genes with common cis-regulatory variation using analyses of allele-specific expression (ASE)...
January 17, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28096364/bilateral-recruitment-of-prefrontal-cortex-in-working-memory-is-associated-with-task-demand-but-not-with-age
#8
Melanie S Höller-Wallscheid, Peter Thier, Jörn K Pomper, Axel Lindner
Elderly adults may master challenging cognitive demands by additionally recruiting the cross-hemispheric counterparts of otherwise unilaterally engaged brain regions, a strategy that seems to be at odds with the notion of lateralized functions in cerebral cortex. We wondered whether bilateral activation might be a general coping strategy that is independent of age, task content and brain region. While using functional magnetic resonance imaging (fMRI), we pushed young and old subjects to their working memory (WM) capacity limits in verbal, spatial, and object domains...
January 17, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28095945/conflict-monitoring-and-adaptation-as-reflected-by-n2-amplitude-in-obsessive-compulsive-disorder
#9
A Riesel, J Klawohn, N Kathmann, T Endrass
BACKGROUND: Feelings of doubt and perseverative behaviours are key symptoms of obsessive-compulsive disorder (OCD) and have been linked to hyperactive error and conflict signals in the brain. While enhanced neural correlates of error monitoring have been robustly shown, far less is known about conflict processing and adaptation in OCD. METHOD: We examined event-related potentials during conflict processing in 70 patients with OCD and 70 matched healthy comparison participants, focusing on the stimulus-locked N2 elicited in a flanker task...
January 18, 2017: Psychological Medicine
https://www.readbyqxmd.com/read/28095891/factors-associated-with-initiation-and-persistence-of-urate-lowering-therapy
#10
Mats Dehlin, Emin Hoxha Ekström, Max Petzold, Ulf Strömberg, Gunilla Telg, Lennart T H Jacobsson
BACKGROUND: Gout is the most common inflammatory arthritic disease and is caused by crystal deposition secondary to persistent hyperuricemia. Etiological treatment with urate-lowering therapy (ULT) has been available since the 1950s but previous studies have demonstrated suboptimal degree of treatment. In recent years we have seen recommendations for ULT earlier in the course of the disease, but there are few contemporary reports reflecting the current situation. Therefore we set out to investigate proportion receiving and persisting with ULT after gout diagnosis and predictors thereof...
January 17, 2017: Arthritis Research & Therapy
https://www.readbyqxmd.com/read/28095889/evolution-of-gut-microbiota-composition-from-birth-to-24-weeks-in-the-infantmet-cohort
#11
Cian J Hill, Denise B Lynch, Kiera Murphy, Marynka Ulaszewska, Ian B Jeffery, Carol Anne O'Shea, Claire Watkins, Eugene Dempsey, Fulvio Mattivi, Kieran Touhy, R Paul Ross, C Anthony Ryan, Paul W O' Toole, Catherine Stanton
BACKGROUND: The gut is the most extensively studied niche of the human microbiome. The aim of this study was to characterise the initial gut microbiota development of a cohort of breastfed infants (n = 192) from 1 to 24 weeks of age. METHODS: V4-V5 region 16S rRNA amplicon Illumina sequencing and, in parallel, bacteriological culture. The metabolomic profile of infant urine at 4 weeks of age was also examined by LC-MS. RESULTS: Full-term (FT), spontaneous vaginally delivered (SVD) infants' microbiota remained stable at both phylum and genus levels during the 24-week period examined...
January 17, 2017: Microbiome
https://www.readbyqxmd.com/read/28095196/analysis-of-online-composite-mirror-descent-algorithm
#12
Yunwen Lei, Ding-Xuan Zhou
We study the convergence of the online composite mirror descent algorithm, which involves a mirror map to reflect the geometry of the data and a convex objective function consisting of a loss and a regularizer possibly inducing sparsity. Our error analysis provides convergence rates in terms of properties of the strongly convex differentiable mirror map and the objective function. For a class of objective functions with Hölder continuous gradients, the convergence rates of the excess (regularized) risk under polynomially decaying step sizes have the order [Formula: see text] after [Formula: see text] iterates...
January 17, 2017: Neural Computation
https://www.readbyqxmd.com/read/28095195/deep-learning-with-dynamic-spiking-neurons-and-fixed-feedback-weights
#13
Arash Samadi, Timothy P Lillicrap, Douglas B Tweed
Recent work in computer science has shown the power of deep learning driven by the backpropagation algorithm in networks of artificial neurons. But real neurons in the brain are different from most of these artificial ones in at least three crucial ways: they emit spikes rather than graded outputs, their inputs and outputs are related dynamically rather than by piecewise-smooth functions, and they have no known way to coordinate arrays of synapses in separate forward and feedback pathways so that they change simultaneously and identically, as they do in backpropagation...
January 17, 2017: Neural Computation
https://www.readbyqxmd.com/read/28095052/increased-gamma-connectivity-during-working-memory-retention-following-traumatic-brain-injury
#14
Neil W Bailey, Nigel C Rogasch, Kate E Hoy, Jerome J Maller, Rebecca A Segrave, Caley M Sullivan, Paul B Fitzgerald
PRIMARY OBJECTIVE: Alterations to functional connectivity following a traumatic brain injury (TBI) may lead to impaired cognitive performance and major depressive disorder (MDD). In particular, functional gamma band connectivity is thought to reflect information binding important for working memory. The objective of this study was to determine whether altered functional gamma connectivity may be a factor in MDD following TBI (TBI-MDD). RESEARCH DESIGN: This study assessed individuals with TBI-MDD, as well as individuals with TBI alone and MDD alone using electroencephalographic recordings while participants performed a working memory task to assess differences in functional connectivity between these groups...
January 17, 2017: Brain Injury: [BI]
https://www.readbyqxmd.com/read/28094892/histological-features-of-the-vomeronasal-organ-in-the-giraffe-giraffa-camelopardalis
#15
Daisuke Kondoh, Kentaro G Nakamura, Yurie S Ono, Kazutoshi Yuhara, Gen Bando, Kenichi Watanabe, Noriyuki Horiuchi, Yoshiyasu Kobayashi, Motoki Sasaki, Nobuo Kitamura
The vomeronasal organ (VNO) that preferentially detects species-specific substances is diverse among animal species, and its morphological properties seem to reflect the ecological features of animals. This histological study of two female reticulated giraffes (Giraffa camelopardalis reticulata) found that the VNO is developed in giraffes. The lateral and medial regions of the vomeronasal lumen were covered with sensory and nonsensory epithelia, respectively. The vomeronasal glands were positive for periodic acid-Schiff and alcian blue (pH 2...
January 17, 2017: Microscopy Research and Technique
https://www.readbyqxmd.com/read/28094285/urinary-exosomes-contain-micrornas-capable-of-paracrine-modulation-of-tubular-transporters-in-kidney
#16
Tannia Gracia, Xiaonan Wang, Ya Su, Elizabeth E Norgett, Timothy L Williams, Pablo Moreno, Gos Micklem, Fiona E Karet Frankl
Exosomes derived from all nephron segments are present in human urine, where their functionality is incompletely understood. Most studies have focused on biomarker discovery rather than exosome function. Through sequencing we identified the miRNA repertoire of urinary exosomes from healthy volunteers; 276 mature miRNAs and 345 pre-miRNAs were identified (43%/7% of reads). Among the most abundant were members of the miR-10, miR-30 and let-7 families. Targets for the identified miRNAs were predicted using five different databases; genes encoding membrane transporters and their regulators were enriched, highlighting the possibility that these miRNAs could modulate key renal tubular functions in a paracrine manner...
January 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28094029/nanostructures-and-monolayers-of-spheres-reduce-surface-reflections-in-hyperiid-amphipods
#17
Laura E Bagge, Karen J Osborn, Sönke Johnsen
Transparent zooplankton and nekton are often nearly invisible when viewed under ambient light in the pelagic zone [1-3]. However, in this environment, where the light field is directional (and thus likely to cause reflections), and under the bioluminescent searchlights of potential predators, animals may be revealed by reflections from their body surface [4-7]. We investigated the cuticle surfaces of seven species of hyperiids (Crustacea; Amphipoda) using scanning electron microscopy and found two undocumented features that may reduce reflectance...
November 21, 2016: Current Biology: CB
https://www.readbyqxmd.com/read/28093472/social-status-dependent-shift-in-neural-circuit-activation-affects-decision-making
#18
Thomas Miller, Katie Clements, Sungwoo Ahn, Choongseok Park, Eoon Hye Ji, Fadi A Issa
: In a social group, animals make behavioral decisions that fit their social ranks. These behavioral choices are dependent on the various social cues experienced during social interactions. In vertebrates, little is known of how social status affects the underlying neural mechanisms regulating decision-making circuits that drive competing behaviors. Here, we demonstrate that social status in zebrafish (Danio rerio) influences behavioral decisions by shifting the balance in neural circuit activation between two competing networks (escape and swim)...
January 16, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28093358/mapping-the-functional-connectome-traits-of-levels-of-consciousness
#19
Enrico Amico, Daniele Marinazzo, Carol Di Perri, Lizette Heine, Jitka Annen, Charlotte Martial, Mario Dzemidzic, Murielle Kirsch, Vincent Bonhomme, Steven Laureys, Joaquín Goñi
Examining task-free functional connectivity (FC) in the human brain offers insights on how spontaneous integration and segregation of information relate to human cognition, and how this organization may be altered in different conditions, and neurological disorders. This is particularly relevant for patients in disorders of consciousness (DOC) following severe acquired brain damage and coma, one of the most devastating conditions in modern medical care. We present a novel data-driven methodology, connICA, which implements Independent Component Analysis (ICA) for the extraction of robust independent FC patterns (FC-traits) from a set of individual functional connectomes, without imposing any a priori data stratification into groups...
January 13, 2017: NeuroImage
https://www.readbyqxmd.com/read/28093252/low-energy-open-ankle-fractures-in-the-elderly-outcome-and-treatment-algorithm
#20
Asanka Wijendra, Rupali Alwe, Michael Lamyman, George A Grammatopoulos, Gregoris Kambouroglou
BACKGROUND: With an aging but still active population, open ankle fractures are increasingly presenting as low energy fragility injuries, sharing many characteristics with that of hip fractures. Yet, there is little in the literature on the management and outcome of these fractures. The primary aim of this study was to describe the outcome following open, ankle fragility fracture. Our secondary aim was to identify potential factors that improved outcome. METHODS: All consecutive, low energy open ankle fractures treated at a Level I Trauma Centre over a five-year period were included...
December 10, 2016: Injury
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