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https://www.readbyqxmd.com/read/28820890/history-based-forward-and-feedback-mechanism-in-cooperative-spectrum-sensing-including-malicious-users-in-cognitive-radio-network
#1
Noor Gul, Ijaz Mansoor Qureshi, Adnan Omar, Atif Elahi, Sajjad Khan
In cognitive radio communication, spectrum sensing plays a vital role in sensing the existence of the primary user (PU). The sensing performance is badly affected by fading and shadowing in case of single secondary user(SU). To overcome this issue, cooperative spectrum sensing (CSS) is proposed. Although the reliability of the system is improved with cooperation but existence of malicious user (MU) in the CSS deteriorates the performance. In this work, we consider the Kullback-Leibler (KL) divergence method for minimizing spectrum sensing data falsification (SSDF) attack...
2017: PloS One
https://www.readbyqxmd.com/read/28820706/high-prevalence-of-treponema-pallidum-infection-in-brazilian-prisoners
#2
Maisa Estopa Correa, Julio Croda, Ana Rita Coimbra Motta de Castro, Sandra Maria do Valle Leone de Oliveira, Maurício Antonio Pompilio, Ronaldo Omizolo de Souza, Júlio Henrique Ferreira de Sá Queiroz, Kesia Esther da Silva, Albert L Ko, Simone Simionatto
The number of new syphilis cases in Brazil has risen alarmingly in recent years. However, there is limited data regarding syphilis prevalence in the Brazilian prison population. To facilitate the development of effective interventions, a cross-sectional study was undertaken to determine the prevalence of Treponema pallidum infection, active syphilis, and associated risk factors among Brazilian prisoners. We administered a questionnaire to a population-based sample of prisoners from 12 prisons in Central-West Brazil and collected sera for syphilis testing, from January to December 2013...
July 31, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28819844/fourier-ptychographic-microscopy-for-rapid-high-resolution-imaging-of-circulating-tumor-cells-enriched-by-microfiltration
#3
Anthony Williams, Jaebum Chung, Changhuei Yang, Richard J Cote
Examining the hematogenous compartment for evidence of metastasis has increased significantly within the oncology research community in recent years, due to the development of technologies aimed at the enrichment of circulating tumor cells (CTCs), the subpopulation of primary tumor cells that gain access to the circulatory system and are responsible for colonization at distant sites. In contrast to other technologies, filtration-based CTC enrichment, which exploits differences in size between larger tumor cells and surrounding smaller, non-tumor blood cells, has the potential to improve CTC characterization through isolation of tumor cell populations with greater molecular heterogeneity...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28819803/if-at-first-you-don-t-succeed%C3%A2-%C3%A2-adoption-of-ipad-marking-for-high-stakes-assessments
#4
Terry Judd, Anna Ryan, Eleanor Flynn, Geoff McColl
Large-scale interview and simulation-based assessments such as objective structured clinical examinations (OSCEs) and multiple mini interviews (MMIs) are logistically complex to administer, generate large volumes of assessment data, and are strong candidates for the adoption of computer-based marking systems. Adoption of new technologies can be challenging, and technical failures, which are relatively commonplace, can delay and/or create resistance to ongoing implementation.This paper reports on the adoption process of an electronic marking system for OSCEs and MMIs following an unsuccessful initial trial...
August 17, 2017: Perspectives on Medical Education
https://www.readbyqxmd.com/read/28818743/learning-and-combining-image-neighborhoods-using-random-forests-for-neonatal-brain-disease-classification
#5
Veronika A Zimmer, Ben Glocker, Nadine Hahner, Elisenda Eixarch, Gerard Sanroma, Eduard Gratacós, Daniel Rueckert, Miguel Ángel González Ballester, Gemma Piella
It is challenging to characterize and classify normal and abnormal brain development during early childhood. To reduce the complexity of heterogeneous data population, manifold learning techniques are increasingly applied, which find a low-dimensional representation of the data, while preserving all relevant information. The neighborhood definition used for constructing manifold representations of the population is crucial for preserving the similarity structure and it is highly application dependent. The recently proposed neighborhood approximation forests learn a neighborhood structure in a dataset based on a user-defined distance...
August 9, 2017: Medical Image Analysis
https://www.readbyqxmd.com/read/28818705/hormone-replacement-therapy-after-risk-reducing-salpingo-oophorectomy-minimises-endocrine-and-sexual-problems-a-prospective-study
#6
Ravi F M Vermeulen, Marc van Beurden, Jacobien M Kieffer, Eveline M A Bleiker, Heiddis B Valdimarsdottir, Leon F A G Massuger, Marian J E Mourits, Katja N Gaarenstroom, Eleonora B L van Dorst, Hans W H M van der Putten, Neil K Aaronson
BACKGROUND: There has been some doubts raised in earlier studies about the efficacy of hormone replacement therapy (HRT) in reducing endocrine and sexual problems in women who have undergone a risk-reducing salpingo-oophorectomy (RRSO). METHODS: In this prospective, observational study, we recruited 178 premenopausal women with a high risk for ovarian cancer. Fifty-seven women opted for RRSO and 121 for gynaecological screening (GS). Women completed questionnaires before surgery (T1) and 3 (T2) and 9 (T3) months post surgery, or at equivalent time points for the GS-group...
August 14, 2017: European Journal of Cancer
https://www.readbyqxmd.com/read/28818512/ploc-meuk-predict-subcellular-localization-of-multi-label-eukaryotic-proteins-by-extracting-the-key-go-information-into-general-pseaac
#7
Xiang Cheng, Xuan Xiao, Kuo-Chen Chou
Many efforts have been made in predicting the subcellular localization of eukaryotic proteins, but most of the existing methods have the following two limitations: (1) their coverage scope is less than ten locations and hence many organelles in an eukaryotic cell cannot be covered, and (2) they can only be used to deal with single-label systems in which each of the constituent proteins has one and only one location. Actually, proteins with multiple locations are particularly interesting since they may have some exceptional functions very important for in-depth understanding the biological process in a cell and for selecting drug target as well...
August 14, 2017: Genomics
https://www.readbyqxmd.com/read/28818313/controlled-single-cell-cyclic-compression-and-transcription-analysis-a-pilot-study
#8
Paola Gavazzo, Loredana Petecchia, Paolo Facci, Massimo Vassalli, Federica Viti
An innovative platform for the study of the molecular mechanisms at the basis of mechanotransduction has been implemented, developing an experimental approach capable of providing controlled dynamic compression stimuli and retrieving the biomolecular response with single-cell sensitivity. The system provides the ability to perform compression-release cycles on single cells with controlled forces in the nN range and a user-defined repetition rate. Experimental procedures to perform qPCR from a small set of single cells were finely tuned...
August 12, 2017: Biophysical Chemistry
https://www.readbyqxmd.com/read/28816540/a-comparison-of-patient-and-health-care-professional-views-when-assessing-quality-of-information-on-pituitary-adenoma-available-on-the-internet
#9
Irena Druce, Chantal Williams, Carolyn Baggoo, Erin Keely, Janine Malcolm
Introduction Patients are increasingly turning to the internet to seek reliable sources of health information and desire guidance in assessing the quality of information as healthcare becomes progressively more complex. Pituitary adenomas are a rare, diverse group of tumors associated with increased mortality and morbidity whose management requires a multidisciplinary approach. As such, patients with this disorder are often searching for additional sources of healthcare information. Objective We undertook a study to assess the quality of information available on the internet for patients with pituitary adenoma...
August 17, 2017: Endocrine Practice
https://www.readbyqxmd.com/read/28816537/evaluating-the-prescription-of-angiotensin-converting-enzyme-inhibitors-or-receptor-blockers-in-patients-with-diabetes-in-jordan
#10
Fadia Mayyas, Wa'ed Bataineh, Anan Jarab
OBJECTIVE: The angiotensin converting enzyme inhibitors (ACEIs) and angiotensin II receptor blockers (ARBs) are guideline-recommended agents to prevent development and progression of nephropathy and cardiovascular diseases in diabetic Mellitus (DM). The aim of this study was to evaluate the prescription of ACEIs/ARBs in DM patients with guideline indications. METHOD: electronic data files for diabetes patients were retrospectively reviewed at a primary care setting northern Jordan...
August 17, 2017: Endocrine Practice
https://www.readbyqxmd.com/read/28815799/characterization-of-opioid-use-in-sickle-cell-disease
#11
Jin Han, Jifang Zhou, Santosh L Saraf, Victor R Gordeuk, Gregory S Calip
PURPOSE: Opioid analgesics are commonly used to treat vaso-occlusive pain episodes in sickle cell disease (SCD), but comprehensive evidence characterizing opioid use in this patient population is limited. Our objective was to characterize opioid use patterns among SCD patients using a large nationwide database. METHODS: A large, US medical claims database was utilized to identify a cohort of 3882 SCD patients, and characteristics of opioid use were analyzed. Clinical variables including age, gender, medication use, health care utilization, and medical history were evaluated for correlations with opioid use...
August 16, 2017: Pharmacoepidemiology and Drug Safety
https://www.readbyqxmd.com/read/28815397/detecting-and-accounting-for-multiple-sources-of-positional-variance-in-peak-list-registration-analysis-and-spin-system-grouping
#12
Andrey Smelter, Eric C Rouchka, Hunter N B Moseley
Peak lists derived from nuclear magnetic resonance (NMR) spectra are commonly used as input data for a variety of computer assisted and automated analyses. These include automated protein resonance assignment and protein structure calculation software tools. Prior to these analyses, peak lists must be aligned to each other and sets of related peaks must be grouped based on common chemical shift dimensions. Even when programs can perform peak grouping, they require the user to provide uniform match tolerances or use default values...
August 16, 2017: Journal of Biomolecular NMR
https://www.readbyqxmd.com/read/28815139/semanticfind-locating-what-you-want-in-a-patient-record-not-just-what-you-ask-for
#13
John M Prager, Jennifer J Liang, Murthy V Devarakonda
We present a new model of patient record search, called SemanticFind, which goes beyond traditional textual and medical synonym matches by locating patient data that a clinician would want to see rather than just what they ask for. The new model is implemented by making extensive use of the UMLS semantic network, distributional semantics, and NLP, to match query terms along several dimensions in a patient record with the returned matches organized accordingly. The new approach finds all clinically related concepts without the user having to ask for them...
2017: AMIA Summits on Translational Science Proceedings
https://www.readbyqxmd.com/read/28815124/pheknow-cloud-a-tool-for-evaluating-high-throughput-phenotype-candidates-using-online-medical-literature
#14
Jette Henderson, Ryan Bridges, Joyce C Ho, Byron C Wallace, Joydeep Ghosh
As the adoption of Electronic Healthcare Records has grown, the need to transform manual processes that extract and characterize medical data into automatic and high-throughput processes has also grown. Recently, researchers have tackled the problem of automatically extracting candidate phenotypes from EHR data. Since these phenotypes are usually generated using unsupervised or semi-supervised methods, it is necessary to examine and validate the clinical relevance of the generated "candidate" phenotypes. We present PheKnow-Cloud, a framework that uses co-occurrence analysis on the publicly available, online repository ofjournal articles, PubMed, to build sets of evidence for user-supplied candidate phenotypes...
2017: AMIA Summits on Translational Science Proceedings
https://www.readbyqxmd.com/read/28815107/introducing-a-comprehensive-informatics-framework-to-promote-breast-cancer-risk-assessment-and-chemoprevention-in-the-primary-care-setting
#15
Joseph Finkelstein, Jeffrey Wood, Katherine D Crew, Rita Kukafka
Breast cancer is the most commonly diagnosed cancer among women in the United States, and current routine screening prevention methods are costly and expose patients to unnecessary risks of overtreatment. The utilization of a risk-based stratification model, genetic testing, and chemoprevention could decrease the incidence of invasive breast cancer but uptake has been low among high-risk women. The goal of this project was to implement a comprehensive informatics framework to promote breast cancer risk assessment and chemoprevention in the primary care setting that was informed by potential user feedback...
2017: AMIA Summits on Translational Science Proceedings
https://www.readbyqxmd.com/read/28814895/caffeine-as-an-opioid-analgesic-adjuvant-in-fibromyalgia
#16
J Ryan Scott, Afton L Hassett, Chad M Brummett, Richard E Harris, Daniel J Clauw, Steven E Harte
BACKGROUND: Caffeine's properties as an analgesic adjuvant with nonsteroidal anti-inflammatory drugs/acetaminophen are well documented. However, little clinical research has explored caffeine's effects on opioid analgesia. This study assessed the effects of caffeine consumption on pain and other symptoms in opioid-using and nonusing chronic pain patients meeting the survey criteria for fibromyalgia. MATERIALS AND METHODS: Patients presenting to a university-based pain clinic completed validated self-report questionnaires assessing symptoms...
2017: Journal of Pain Research
https://www.readbyqxmd.com/read/28814839/acceptance-and-usability-of-a-home-based-monitoring-tool-of-health-indicators-in-children-of-people-with-dementia-a-proof-of-principle-pop-study
#17
April Bcg Boessen, Joan Vermeulen, Luc P de Witte
BACKGROUND: Large-scale cohort studies are needed to confirm the relation between dementia and its possible risk factors. The inclusion of people with dementia in research is a challenge, however, children of people with dementia are at risk and are highly motivated to participate in dementia research. For technologies to support home-based data collection during large-scale studies, participants should be able and willing to use technology for a longer period of time. OBJECTIVE: This study investigated acceptance and usability of iVitality, a research platform for home-based monitoring of dementia health indicators, in 151 children of people with dementia and investigated which frequency of measurements is acceptable for them...
2017: Patient Preference and Adherence
https://www.readbyqxmd.com/read/28814063/icave-an-open-source-tool-for-visualizing-biomolecular-networks-in-3d-stereoscopic-3d-and-immersive-3d
#18
Vaja Liluashvili, Selim Kalayci, Eugene Fluder, Manda Wilson, Aaron Gabow, Zeynep H Gümüs
Visualizations of biomolecular networks assist in systems-level data exploration in many cellular processes. Data generated from high-throughput experiments increasingly inform these networks, yet current tools do not adequately scale with concomitant increase in their size and complexity. We present an open source software platform, interactome-CAVE (iCAVE), for visualizing large and complex biomolecular interaction networks in 3D. Users can explore networks (i) in 3D using a desktop, (ii) in stereoscopic 3D using 3D-vision glasses and a desktop, or (iii) in immersive 3D within a CAVE environment...
August 1, 2017: GigaScience
https://www.readbyqxmd.com/read/28814044/a-survey-of-stakeholder-perspectives-on-a-proposed-combined-exoskeleton-wheelchair-technology
#19
Tim Bhatnagar, W Ben Mortensen, Johanne Mattie, Jamie Wolff, Claire Parker, Jaimie Borisoff
BACKGROUND: Exoskeleton technology has potential benefits for wheelchair users' health and mobility. However, there are practical barriers to their everyday use as a mobility device. In particular, challenges related to travelling longer distances and transitioning between using a wheelchair and exoskeleton walking may present significant deterrents to regular exoskeleton use. In an effort to remove these barriers, a combined exoskeleton-wheelchair concept ('COMBO') has been proposed, which aims to achieve the benefits of both these mobility technologies...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28814042/portable-haptic-device-for-lower-limb-amputee-gait-feedback-assessing-static-and-dynamic-perceptibility
#20
M A B Husman, H F Maqbool, M I Awad, A A Dehghani-Sanij
Loss of joints and severed sensory pathway cause reduced mobility capabilities in lower limb amputees. Although prosthetic devices attempt to restore normal mobility functions, lack of awareness and control of limb placement increase the risk of falling and causing amputee to have high level of visual dependency. Haptic feedback can serve as a cue for gait events during ambulation thus providing sense of awareness of the limb position. This paper presents a wireless wearable skin stretch haptic device to be fitted around the thigh region...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
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