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https://www.readbyqxmd.com/read/28545229/an-iterative-distortion-compensation-algorithm-for-camera-calibration-based-on-phase-target
#1
Yongjia Xu, Feng Gao, Hongyu Ren, Zonghua Zhang, Xiangqian Jiang
Camera distortion is a critical factor affecting the accuracy of camera calibration. A conventional calibration approach cannot satisfy the requirement of a measurement system demanding high calibration accuracy due to the inaccurate distortion compensation. This paper presents a novel camera calibration method with an iterative distortion compensation algorithm. The initial parameters of the camera are calibrated by full-field camera pixels and the corresponding points on a phase target. An iterative algorithm is proposed to compensate for the distortion...
May 23, 2017: Sensors
https://www.readbyqxmd.com/read/28545224/natural-inspired-intelligent-visual-computing-and-its-application-to-viticulture
#2
Li Minn Ang, Kah Phooi Seng, Feng Lu Ge
This paper presents an investigation of natural inspired intelligent computing and its corresponding application towards visual information processing systems for viticulture. The paper has three contributions: (1) a review of visual information processing applications for viticulture; (2) the development of natural inspired computing algorithms based on artificial immune system (AIS) techniques for grape berry detection; and (3) the application of the developed algorithms towards real-world grape berry images captured in natural conditions from vineyards in Australia...
May 23, 2017: Sensors
https://www.readbyqxmd.com/read/28545196/comparison-of-cox-regression-and-parametric-models-application-for-assessment-of-survival-of-pediatric-cases-of-acute-leukemia-in-southern-iran
#3
Saeed Hosseini Teshnizi, Seyyed Mohammad Taghi Ayatollahi
Background: Finding the most appropriate regression model for survival data in cancer casesin order to determine prognosis is an important issue in medical research. Here we compare Cox and parametric regression models regarding survival of children with acute leukemia in southern Iran. Methods: In a retrospective cohort study, information for 197 children with acute leukemia over 6 years was collected through observation and interviews. In order to identify factors affecting their survival, the Cox and parametric (exponential, Weibull, log-logistic, log-normal, Gompertz and generalized gamma) models were fitted to the data...
April 1, 2017: Asian Pacific Journal of Cancer Prevention: APJCP
https://www.readbyqxmd.com/read/28545121/measurement-of-macular-structure-function-relationships-using-spectral-domain-optical-coherence-tomography-sd-oct-and-pattern-electroretinograms-perg
#4
Keunheung Park, Jinmi Kim, Jiwoong Lee
BACKGROUND: Retinal ganglion cell (RGC) death is a common cause of loss of vision during glaucoma. Pattern electroretinogram (PERG) is an objective measure of the central retinal function that correlates with macular GCL thickness. The aim of this study is to determine possible relationships between the N95 amplitude of pattern electroretinogram (PERGamp) and macular ganglion cell/inner plexiform layer thickness (GCIPLT). METHODS AND FINDINGS: This was a retrospective and comparative study including 74 glaucoma patients (44 early stage and 30 advanced stage cases) and 66 normal control subjects...
2017: PloS One
https://www.readbyqxmd.com/read/28545074/influence-of-distance-between-residence-and-health-facilities-on-non-communicable-diseases-an-assessment-over-hypertension-and-diabetes-in-bangladesh
#5
Raaj Kishore Biswas, Enamul Kabir
OBJECTIVE: This paper reflected on the prevalence of hypertension and diabetes in Bangladesh, which is spreading rapidly in low-income countries. The rationale of constructing more health centers for addressing NCDs was assessed in this paper by determining the relationship between prevalence of NCDs, particularly hypertension and diabetes, and distance to health facilities. METHODS: From BDHS (Bangladesh Health and Demographic Survey) 2011 data set, 7544 samples were analyzed to demonstrate association between Non-communicable diseases (NCD) and distance from respondents' home to health facilities like hospitals, community clinics, pharmacies or doctors' chambers, and community facilities like market, post office or cinema hall...
2017: PloS One
https://www.readbyqxmd.com/read/28545065/influence-of-the-ferric-uptake-regulator-fur-protein-on-pathogenicity-in-pectobacterium-carotovorum-subsp-brasiliense
#6
Collins Kipngetich Tanui, Divine Yutefar Shyntum, Stefan Louis Priem, Jacques Theron, Lucy Novungayo Moleleki
Iron is an important nutrient for the survival and growth of many organisms. In order to survive, iron uptake from the environment must be strictly regulated and maintained to avoid iron toxicity. The ferric uptake regulator protein (Fur) regulates genes involved in iron homeostasis in many bacteria, including phytopathogens. However, to date, the role played by Fur in the biology of Pectobacterium carotovorum subsp. brasiliense (Pcb1692), an important pathogen of potatoes, has not yet been studied. To this end, we used the lambda recombineering method to generate a fur mutant strain of Pcb1692 and assessed the virulence and fitness of the mutant strain...
2017: PloS One
https://www.readbyqxmd.com/read/28545048/a-distribution-model-of-functional-connectome-based-on-criticality-and-energy-constraints
#7
Kosuke Takagi
The analysis of the network structure of the functional connectivity data constructed from fMRI images provides basic information about functions and features of the brain activity. We focus on the two features which are considered as relevant to the brain activity, the criticality and the constraint regarding energy consumptions. Within a wide variety of complex systems, the critical state occurs associated with a phase transition between distinct phases, random one and order one. Although the hypothesis that human brain activity is also in a state of criticality is supported by some experimental results, it still remains controversial...
2017: PloS One
https://www.readbyqxmd.com/read/28544996/temperate-bacteriophages-as-regulators-of-host-behavior
#8
REVIEW
Tal Argov, Gil Azulay, Anna Pasechnek, Olga Stadnyuk, Shai Ran-Sapir, Ilya Borovok, Nadejda Sigal, Anat A Herskovits
Bacteriophages are ubiquitous and affect most facets of life, from evolution of bacteria, through ecology and global biochemical cycling to human health. The interactions between phages and bacteria often lead to biological novelty and an important milestone in this process is the ability of phages to regulate their host's behavior. In this review article, we will focus on newly reported cases that demonstrate how temperate phages regulate bacterial gene expression and behavior in a variety of bacterial species, pathogenic and environmental...
May 22, 2017: Current Opinion in Microbiology
https://www.readbyqxmd.com/read/28544966/antibacterial-property-and-biocompatibility-of-chitosan-poly-vinyl-alcohol-zno-cs-pva-zno-beads-as-an-efficient-adsorbent-for-cu-ii-removal-from-aqueous-solution
#9
Jiao Xu, Yaping Zhang, Yuvaraja Gutha, Weijiang Zhang
The feasibility of using chitosan/Poly(vinyl alcohol)/ZnO beads (CS/PVA/ZnO) as an adsorbent for removal of Cu(II) ions from aqueous solutions was studied in a batch method. The developed adsorbent material was characterized by XRD, FTIR, SEM and TEM analysis. Pure ZnO shows the characteristic peaks at (100), (002), (101), (102), (110), (103), (200) and (112) that were in good agreement with wurtzite ore having hexagonal lattice structure. Antibacterial properties and biocompatibility of the CS/PVA/ZnO was tested...
May 11, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28544886/the-level-of-physical-fitness-in-children-aged-6-7years-with-low-birthweight
#10
Elżbieta Cieśla, Monika Zaręba, Sławomir Kozieł
BACKGROUND: Level of physical fitness is related to the functional status of most of the bodily functions and so it appears to be very important to identify perinatal factors influencing physical fitness. AIM: The purpose of this study was to determine the influence of birth weight on the level of physical fitness in children 6-7years of age. SUBJECTS AND METHOD: Physical fitness was assessed using EUROFIT tests in 28,623 children, aged 6-7years, from rural areas in Poland...
May 22, 2017: Early Human Development
https://www.readbyqxmd.com/read/28544857/new-treatment-directions-for-ipf-current-status-of-ongoing-and-upcoming-clinical-trials
#11
Francesco Macagno, Francesco Varone, Paolo Maria Leone, Pier-Valerio Mari, Loredana Panico, Ludovica Berardini, Luca Richeldi
The main objective of this review is to explore the wide and expanding field of new clinical trials in IPF. Recent trials have confirmed the efficacy of the approved drugs pirfenidone and nintedanib; nonetheless, the discovery of new biological pathways has opened new horizons in this field. Areas Covered: New strategies against matrix deposition are under study and so is for the role of immunity and autoimmunity. Recent advances in the use of stem cells are opening new possibilities for the recovery of damaged lung tissues...
May 25, 2017: Expert Review of Respiratory Medicine
https://www.readbyqxmd.com/read/28544835/leaflet-mechanical-properties-of-carpentier-edwards-perimount-magna-pericardial-aortic-bioprostheses
#12
Heide Kuang, Yue Xuan, Michelle Lu, Aart Mookhoek, Andrew D Wisneski, Julius M Guccione, Liang Ge, Elaine E Tseng
BACKGROUND: Transcatheter aortic valve replacement (TAVR) has recently been shown to be equivalent to surgical aortic valve replacement (SAVR) in intermediate-risk patients. As TAVR expands towards the traditionally SAVR population, TAVR versus SAVR durability becomes increasingly important. While the durability of TAVR is unknown, valve design - particularly with regards to leaflet stress - impacts on valve durability. Although leaflet stress cannot be measured directly, it can be determined using finite element modeling, with such models requiring the mechanical properties of the leaflets...
January 2017: Journal of Heart Valve Disease
https://www.readbyqxmd.com/read/28544806/can-soil-microbial-diversity-influence-plant-metabolites-and-life-history-traits-of-a-rhizophagous-insect-a-demonstration-in-oilseed-rape
#13
Tom Lachaise, Morgane Ourry, Lionel Lebreton, Anne-Yvonne Guillerm-Erckelboudt, Juliette Linglin, Chrystelle Paty, Valérie Chaminade, Nathalie Marnet, Julie Aubert, Denis Poinsot, Anne-Marie Cortesero, Christophe Mougel
Interactions between plants and phytophagous insects play an important part in shaping the biochemical composition of plants. Reciprocally plant metabolites can influence major life history traits in these insects and largely contribute to their fitness. Plant rhizospheric microorganisms are an important biotic factor modulating plant metabolites and adaptation to stress. While plant-insects or plant-microorganisms interactions and their consequences on the plant metabolite signature are well-documented, the impact of soil microbial communities on plant defenses against phytophagous insects remains poorly known...
May 23, 2017: Insect Science
https://www.readbyqxmd.com/read/28544773/feasible-sampling-plan-for-bemisia-tabaci-control-decision-making-in-watermelon-fields
#14
Carlos H O Lima, Renato A Sarmento, Poliana S Pereira, Tarcísio V S Galdino, Fábio A Santos, Joedna Silva, Marcelo C Picanço
BACKGROUND: The silverleaf whitefly Bemisia tabaci is one of the most important pests of watermelon fields worldwide. Conventional sampling plans are the starting point for the generation of decision-making systems of integrated pest management programs. The aim of this study was to determine a conventional sampling plan for B. tabaci in watermelon fields. RESULTS: The optimal leaf for B. tabaci adult sampling was the 6(th) most apical leaf. Direct counting was the best pest sampling technique...
May 23, 2017: Pest Management Science
https://www.readbyqxmd.com/read/28544739/factor-analysis-of-the-swedish-version-of-the-dark-triad-dirty-dozen
#15
Danilo Garcia, Shane MacDonald, Max Rapp-Ricciardi
The aim of this study was to test the proposed three-factor structure of the Swedish version of the Dark Triad Dirty Dozen measure. A confirmatory factor analysis showed mixed evidence for model fit. In contrast to expectations, men did not score significantly higher than women in Machiavellianism and narcissism. Nevertheless, men scored higher than women in psychopathy.
May 22, 2017: PsyCh Journal
https://www.readbyqxmd.com/read/28544646/evaluating-the-accuracy-and-economic-value-of-a-new-test-in-the-absence-of-a-perfect-reference-test
#16
Xuanqian Xie, Alison Sinclair, Nandini Dendukuri
BACKGROUND: Streptococcus pneumoniae (SP) pneumonia is often treated empirically as diagnosis is challenging because of the lack of a perfect test. Using BinaxNOW-SP, a urinary antigen test, as an add-on to standard cultures may not only increase diagnostic yield but also increase costs. OBJECTIVE: To estimate the sensitivity and specificity of BinaxNOW-SP and subsequently estimate the cost-effectiveness of adding BinaxNOW-SP to the diagnostic work-up. DESIGN: We fit a Bayesian latent-class meta-analysis model to obtain estimates of BinaxNOW-SP accuracy that adjust for the imperfect accuracy of culture...
May 23, 2017: Research Synthesis Methods
https://www.readbyqxmd.com/read/28544457/both-the-frequency-of-hba1c-testing-and-the-frequency-of-smbg-predict-metabolic-control-a-multicenter-analysis-of-15-199-adult-type-1-diabetes-patients-from-germany-and-austria
#17
A Schwandt, F Best, T Biester, A Grünerbel, F Kopp, D Krakow, M Laimer, C Wagner, R W Holl
BACKGROUND: The objective of this study was to examine the association between metabolic control and frequency of hemoglobin A1c (HbA1c) measurements and of self-monitoring of blood glucose (SMBG), as well as the interaction of both. METHODS: Data of 15,199 adult type 1 diabetes patients registered in a standardized electronic health record (DPV) were included. To model the association between metabolic control and frequency of HbA1c testing or of SMBG, multiple hierarchic regression models with adjustment for confounders were fitted...
May 19, 2017: Diabetes/metabolism Research and Reviews
https://www.readbyqxmd.com/read/28544401/induced-fit-recognition-of-ccg-trinucleotide-repeats-by-a-nickel-chromomycin-complex-results-in-large-scale-dna-deformation
#18
Wen-Hsuan Tseng, Chung-Ke Chang, Pei-Ching Wu, Nien-Jen Hu, Gene-Hsiang Lee, Ching-Cherng Tzeng, Stephen Neidle, Ming-Hon Hou
Small-molecule compounds targeting trinucleotide repeats in DNA have considerable potential as therapeutic or diagnostic agents against many neurological diseases. NiII(Chro)2 (Chro = chromomycin A3) was found to bind specifically to the minor groove of (CCG)n repeats in duplex DNA, with unique fluorescence features that may serve as a probe for disease detection. Crystallographic studies have revealed that the specificity originates from the large-scale spatial rearrangement of the DNA structure, including extrusion of consecutive bases and backbone distortions, with a sharp bending of the duplex accompanied by conformational changes in the Ni(II) chelate itself...
May 23, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28544380/extending-the-two-process-model-of-burnout-in-child-protection-workers-the-role-of-resilience-in-mediating-burnout-via-organizational-factors-of-control-values-fairness-reward-workload-and-community-relationships
#19
Paula McFadden, John Mallett, Michael Leiter
Burnout has been disproportionally reported in child protection social work. This paper presents data from 162 child protection staff in Northern Ireland, assessed for burnout using the Maslach Burnout Inventory. Path models were estimated, based on an extension of the two-process demands and values model (Leiter, ) to include additional measures of resilience using the Resilience Scale-14, as well as perceived rewards and sense of community from the Areas of Work Life Scale (Leiter, ). Optimal model fit was achieved by modelling resilience as a mediator of the relationship between organizational factors of control and value congruence and burnout...
May 23, 2017: Stress and Health: Journal of the International Society for the Investigation of Stress
https://www.readbyqxmd.com/read/28544356/older-people-s-experiences-of-falling-and-perceived-risk-of-falls-in-the-community-a-narrative-synthesis-of-qualitative-research
#20
REVIEW
Siobhan Gardiner, Margaret Glogowska, Catherine Stoddart, Sarah Pendlebury, Daniel Lasserson, Debra Jackson
AIM: To examine qualitative research exploring older people's experiences of falling and the perceived risk of falling in the community. This will contribute new insights into how falling is perceived by the older community. BACKGROUND: Falls are a major problem for older people and healthcare services across the world. Accidental falls in the community are a persistent problem that is generally recognised as an intrinsic risk of ageing. This review provides a new synthesis of evidence that considers older people's perception of falls in the community as new insights are needed if the increasing problems of falls are to be addressed...
May 22, 2017: International Journal of Older People Nursing
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