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https://www.readbyqxmd.com/read/29666924/ft-ir-investigations-on-effect-of-high-doses-of-gamma-radiation-induced-damage-to-polystyrene-and-mechanism-of-formation-of-radiolysis-products
#1
P Vivek Vardhan, Lata Israni Shukla
The present article focuses on the influence of gamma irradiation and post-irradiation storage conditions on FT-IR spectra of 1 mm thick polystyrene irradiated with 51, 77 and 129 kGy. The increase in amplitude corresponding to 3600, 3400 and 2100 cm- 1 stretching frequencies clearly showing the formation of O-H and C=O bonds (~ 25%). On prolonged storage (2160 h) in the dark, there is an increase in O-H group (~ 28%). The electron cloud facilitates the formation of hydroxyl group in irradiated polystyrene...
April 17, 2018: Radiation and Environmental Biophysics
https://www.readbyqxmd.com/read/29666448/regions-of-open-water-and-melting-sea-ice-drive-new-particle-formation-in-north-east-greenland
#2
M Dall Osto, C Geels, D C S Beddows, D Boertmann, R Lange, J K Nøjgaard, Roy M Harrison, R Simo, H Skov, A Massling
Atmospheric new particle formation (NPF) and growth significantly influences the indirect aerosol-cloud effect within the polar climate system. In this work, the aerosol population is categorised via cluster analysis of aerosol number size distributions (9-915 nm, 65 bins) taken at Villum Research Station, Station Nord (VRS) in North Greenland during a 7 year record (2010-2016). Data are clustered at daily averaged resolution; in total, we classified six categories, five of which clearly describe the ultrafine aerosol population, one of which is linked to nucleation events (up to 39% during summer)...
April 17, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29666042/relationship-between-evidence-requirements-user-expectations-and-actual-experiences-usability-evaluation-of-the-twazon-arabic-weight-loss-app
#3
Aroub Alnasser, Janet Kyle, Abdulrahman Alkhalifah, Debbi Marais
BACKGROUND: Saudi Arabia has faced a steady growth in the prevalence of obesity. The concurrent and ubiquitous use of mobile technology, such as smartphones and apps, provides an opportunity for the implementation of mHealth technology, a method for delivering behavioral interventions. Despite their effectiveness in promoting lifestyle and diet modification, culturally adapted weight loss apps and related interventions are lacking in Gulf Cooperation Council countries. OBJECTIVE: The objective of our study was to identify the relationship between adherence to evidence-informed practices, potential user expectations, and actual user experiences in order to enhance the understanding of the overall usability of the Twazon Arabic weight loss app...
April 17, 2018: JMIR Human Factors
https://www.readbyqxmd.com/read/29666041/secure-logistic-regression-based-on-homomorphic-encryption-design-and-evaluation
#4
Miran Kim, Yongsoo Song, Shuang Wang, Yuhou Xia, Xiaoqian Jiang
BACKGROUND: Learning a model without accessing raw data has been an intriguing idea to security and machine learning researchers for years. In an ideal setting, we want to encrypt sensitive data to store them on a commercial cloud and run certain analyses without ever decrypting the data to preserve privacy. Homomorphic encryption technique is a promising candidate for secure data outsourcing, but it is a very challenging task to support real-world machine learning tasks. Existing frameworks can only handle simplified cases with low-degree polynomials such as linear means classifier and linear discriminative analysis...
April 17, 2018: JMIR Medical Informatics
https://www.readbyqxmd.com/read/29665334/sequence-directionality-dramatically-affects-lcst-behavior-of-elastin-like-polypeptides
#5
Nan K Li, Stefan Roberts, Felipe Garcia Quiroz, Ashutosh Chilkoti, Yaroslava G Yingling
Elastin-like polypeptides (ELP) exhibit an inverse temperature transition or lower critical solution temperature (LCST) transition phase behavior in aqueous solutions. In this paper, the thermal responsive properties of the canonical ELP, poly(VPGVG), and its reverse sequence poly(VGPVG) were investigated by turbidity measurements of the cloud point behavior, circular dichroism (CD) measurements, and all-atom molecular dynamics (MD) simulations to gain a molecular understanding of mechanism that controls hysteretic phase behavior...
April 17, 2018: Biomacromolecules
https://www.readbyqxmd.com/read/29665097/real-world-use-of-elbasvir-grazoprevir-in-patients-with-chronic-hepatitis-c-retrospective-analyses-from-the-trio-network
#6
S L Flamm, B Bacon, M P Curry, S Milligan, C U Nwankwo, N Tsai, Z Younossi, N Afdhal
BACKGROUND: Elbasvir-grazoprevir is indicated for chronic hepatitis C virus (HCV) genotypes 1 and 4. AIMS: To evaluate the utilization and outcomes of chronic HCV patients treated with elbasvir-grazoprevir in the United States. METHODS: We conducted a retrospective cohort study of adults treated with elbasvir-grazoprevir with or without ribavirin for chronic HCV genotypes 1 or 4 infection. Data were collected from healthcare providers and specialty pharmacies through Innervation Platform, a proprietary, cloud-based disease management program from Trio Health...
April 17, 2018: Alimentary Pharmacology & Therapeutics
https://www.readbyqxmd.com/read/29662043/big-data-clustering-via-community-detection-and-hyperbolic-network-embedding-in-iot-applications
#7
Vasileios Karyotis, Konstantinos Tsitseklis, Konstantinos Sotiropoulos, Symeon Papavassiliou
In this paper, we present a novel data clustering framework for big sensory data produced by IoT applications. Based on a network representation of the relations among multi-dimensional data, data clustering is mapped to node clustering over the produced data graphs. To address the potential very large scale of such datasets/graphs that test the limits of state-of-the-art approaches, we map the problem of data clustering to a community detection one over the corresponding data graphs. Specifically, we propose a novel computational approach for enhancing the traditional Girvan-Newman (GN) community detection algorithm via hyperbolic network embedding...
April 15, 2018: Sensors
https://www.readbyqxmd.com/read/29661069/the-black-cloud-phenomenon-in-hand-surgery
#8
Emily Zhao, Nathan Tiedeken, William Wang, John Fowler
BACKGROUND: The term black cloud for a surgeon is generally used to describe someone who is unusually busy compared with his or her counterparts, and it is a superstition that tends to pervade the medical world. The purpose of this study is to investigate whether black clouds exist in hand surgery. METHODS: We examined one academic year's worth of hand surgery-specific call at a level I trauma center and tabulated the number of hand-related patient transfers and add-on cases per surgeon...
April 1, 2018: Hand: Official Journal of the American Association for Hand Surgery
https://www.readbyqxmd.com/read/29660551/photogrammetry-of-the-human-brain-a-novel-method-for-3d-the-quantitative-exploration-of-the-structural-connectivity-in-neurosurgery-and-neurosciences
#9
Alessandro De Benedictis, Erica Nocerino, Fabio Menna, Fabio Remondino, Mattia Barbareschi, Umberto Rozzanigo, Francesco Corsini, Emanuele Olivetti, Carlo Efisio Marras, Franco Chioffi, Paolo Avesani, Silvio Sarubbo
BACKGROUND: Anatomical awareness of brain's structural connectivity is mandatory for neurosurgeons, to select the most effective approaches for brain resections. Although standard micro-dissection is a validated technique to investigate the different white matter (WM) pathways and to verify results coming from tractography, the possibility of an interactive exploration of the specimens and of a reliable acquisition of quantitative information has not been described so far. Photogrammetry is a well-established technique allowing an accurate metrology on highly defined 3D-models...
April 13, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29660494/accurate-filtering-of-privacy-sensitive-information-in-raw-genomic-data
#10
Jérémie Decouchant, Maria Fernandes, Marcus Völp, Francisco M Couto, Paulo Esteves-Veríssimo
Sequencing thousands of human genomes has enabled breakthroughs in many areas, among them precision medicine, the study of rare diseases, and forensics. However, mass collection of such sensitive data entails enormous risks if not protected to the highest standards. In this article, we follow the position and argue that post-alignment privacy is not enough and that data should be automatically protected as early as possible in the genomics workflow, ideally immediately after the data is produced. We show that a previous approach for filtering short reads cannot extend to long reads and present a novel filtering approach that classifies raw genomic data (i...
April 13, 2018: Journal of Biomedical Informatics
https://www.readbyqxmd.com/read/29659720/mp-lamp-parallel-detection-of-statistically-significant-multi-loci-markers-on-cloud-platforms
#11
Kazuki Yoshizoe, Aika Terada, Koji Tsuda
Summary: Exhaustive detection of multi-loci markers from genome-wide association study datasets is a computationally challenging problem. This paper presents a massively parallel algorithm for finding all significant combinations of alleles and introduces a software tool termed MP-LAMP that can be easily deployed in a cloud platform, such as Amazon Web Service, as well as in an in-house computer cluster. Multi-loci marker detection is an unbalanced tree search problem that cannot be parallelized by simple tree-splitting using generic parallel programming frameworks, such as Map-Reduce...
April 6, 2018: Bioinformatics
https://www.readbyqxmd.com/read/29659068/evolving-standards-of-care-in-the-age-of-cybertechnology
#12
Frederic G Reamer
Behavioral health professionals are making increased use of cybertechnology to deliver services to patients, communicate with patients, gather information about patients, and communicate with colleagues. The advent of cybertechnology - included the Internet, text (SMS), email, video, cloud storage of electronic records, and other forms of electronic communication and documentation - has introduced novel and unprecedented ethical and risk-management challenges. This article provides an overview of emerging issues related to informed consent; delivery of services; privacy, confidentiality, and privileged communication; boundary issues and dual relationships; documentation; and practitioners' relationships with colleagues...
March 2018: Behavioral Sciences & the Law
https://www.readbyqxmd.com/read/29659023/a-dynamic-model-based-approach-to-motion-and-deformation-tracking-of-prosthetic-valves-from-biplane-x-ray-images
#13
Martin G Wagner, Charles R Hatt, David A P Dunkerley, Lindsay E Bodart, Amish N Raval, Michael A Speidel
PURPOSE: Transcatheter aortic valve replacement (TAVR) is a minimally invasive procedure in which a prosthetic heart valve is placed and expanded within a defective aortic valve. The device placement is commonly performed using two-dimensional fluoroscopic imaging. Within this work, we propose a novel technique to track the motion and deformation of the prosthetic valve in three dimensions based on biplane fluoroscopic image sequences. METHODS: The tracking approach uses a parameterized point cloud model of the valve stent which can undergo rigid 3D transformation and different modes of expansion...
April 16, 2018: Medical Physics
https://www.readbyqxmd.com/read/29658526/curve-fitting-problem-torque-velocity-relationship-with-polynomials-and-boltzmann-sigmoid-functions
#14
Peter Milanov, Gergana Koroleova, Radoslav Mavrevski, Nevena Pencheva
PURPOSE: The aim of this study was to investigate the curve fitting and model selection problem of the torque-velocity relationship of elbow flexors and extensors in untrained females. The second goal was to determine the optimal models in different function classes and the best, among the optimal ones. Lastly, test the best models to predict the torque were tested. METHODS: Using the polynomials (second - fourth degree) and Boltzmann sigmoid functions, and a different presentation of data points (averages, a point cloud, etc...
2018: Acta of Bioengineering and Biomechanics
https://www.readbyqxmd.com/read/29655946/big-data-handling-mechanisms-in-the-healthcare-applications-a-comprehensive-and-systematic-literature-review
#15
REVIEW
Asma Pashazadeh, Nima Jafari Navimipour
Healthcare provides many services such as diagnosing, treatment, prevention of diseases, illnesses, injuries, and other physical and mental disorders. Large-scale distributed data processing applications in healthcare as a basic concept operates on large amounts of data. Therefore, big data application functions are the main part of healthcare operations, but there was not any comprehensive and systematic survey about studying and evaluating the important techniques in this field. Therefore, this paper aims at providing the comprehensive, detailed, and systematic study of the state-of-the-art mechanisms in the big data related to healthcare applications in five categories, including machine learning, cloud-based, heuristic-based, agent-based, and hybrid mechanisms...
April 12, 2018: Journal of Biomedical Informatics
https://www.readbyqxmd.com/read/29652810/edge-based-efficient-search-over-encrypted-data-mobile-cloud-storage
#16
Yeting Guo, Fang Liu, Zhiping Cai, Nong Xiao, Ziming Zhao
Smart sensor-equipped mobile devices sense, collect, and process data generated by the edge network to achieve intelligent control, but such mobile devices usually have limited storage and computing resources. Mobile cloud storage provides a promising solution owing to its rich storage resources, great accessibility, and low cost. But it also brings a risk of information leakage. The encryption of sensitive data is the basic step to resist the risk. However, deploying a high complexity encryption and decryption algorithm on mobile devices will greatly increase the burden of terminal operation and the difficulty to implement the necessary privacy protection algorithm...
April 13, 2018: Sensors
https://www.readbyqxmd.com/read/29652788/a-novel-lidar-based-instrument-for-high-throughput-3d-measurement-of-morphological-traits-in-maize-and-sorghum
#17
Suresh Thapa, Feiyu Zhu, Harkamal Walia, Hongfeng Yu, Yufeng Ge
Recently, imaged-based approaches have developed rapidly for high-throughput plant phenotyping (HTPP). Imaging reduces a 3D plant into 2D images, which makes the retrieval of plant morphological traits challenging. We developed a novel LiDAR-based phenotyping instrument to generate 3D point clouds of single plants. The instrument combined a LiDAR scanner with a precision rotation stage on which an individual plant was placed. A LabVIEW program was developed to control the scanning and rotation motion, synchronize the measurements from both devices, and capture a 360° view point cloud...
April 13, 2018: Sensors
https://www.readbyqxmd.com/read/29651373/using-modis-cloud-regimes-to-sort-diagnostic-signals-of-aerosol-cloud-precipitation-interactions
#18
Lazaros Oreopoulos, Nayeong Cho, Dongmin Lee
Coincident multi-year measurements of aerosol, cloud, precipitation and radiation at near-global scales are analyzed to diagnose their apparent relationships as suggestive of interactions previously proposed based on theoretical, observational, and model constructs. Specifically, we examine whether differences in aerosol loading in separate observations go along with consistently different precipitation, cloud properties, and cloud radiative effects. Our analysis uses a cloud regime (CR) framework to dissect and sort the results...
May 27, 2017: Journal of Geophysical Research. Atmospheres: JGR
https://www.readbyqxmd.com/read/29643364/predictd-parallel-epigenomics-data-imputation-with-cloud-based-tensor-decomposition
#19
Timothy J Durham, Maxwell W Libbrecht, J Jeffry Howbert, Jeff Bilmes, William Stafford Noble
The Encyclopedia of DNA Elements (ENCODE) and the Roadmap Epigenomics Project seek to characterize the epigenome in diverse cell types using assays that identify, for example, genomic regions with modified histones or accessible chromatin. These efforts have produced thousands of datasets but cannot possibly measure each epigenomic factor in all cell types. To address this, we present a method, PaRallel Epigenomics Data Imputation with Cloud-based Tensor Decomposition (PREDICTD), to computationally impute missing experiments...
April 11, 2018: Nature Communications
https://www.readbyqxmd.com/read/29642552/three-dimensional-registration-for-handheld-profiling-systems-based-on-multiple-shot-structured-light
#20
Shirazi Muhammad Ayaz, Danish Khan, Min Young Kim
In this article, a multi-view registration approach for the 3D handheld profiling system based on the multiple shot structured light technique is proposed. The multi-view registration approach is categorized into coarse registration and point cloud refinement using the iterative closest point (ICP) algorithm. Coarse registration of multiple point clouds was performed using relative orientation and translation parameters estimated via homography-based visual navigation. The proposed system was evaluated using an artificial human skull and a paper box object...
April 9, 2018: Sensors
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