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https://www.readbyqxmd.com/read/28325035/calculation-of-energy-diagram-of-asymmetric-graded-band-gap-semiconductor-superlattices
#1
Liubomyr S Monastyrskii, Bogdan S Sokolovskii, Mariya P Alekseichyk
The paper theoretically investigates the peculiarities of energy diagram of asymmetric graded-band-gap superlattices with linear coordinate dependences of band gap and electron affinity. For calculating the energy diagram of asymmetric graded-band-gap superlattices, linearized Poisson's equation has been solved for the two layers forming a period of the superlattice. The obtained coordinate dependences of edges of the conduction and valence bands demonstrate substantial transformation of the shape of the energy diagram at changing the period of the lattice and the ratio of width of the adjacent layers...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28325025/comparison-between-users-of-a-new-methodology-for-heart-sound-auscultation
#2
Ana Castro, Pedro Gomes, Sandra S Mattos, Miguel T Coimbra
Auscultation is a routine exam and the first line of screening in heart pathologies. The objective of this study was to assess if using a new data collection system, the DigiScope Collector, with a guided and automatic annotation of heart auscultation, different levels of expertise/experience users could collect similar digital auscultations. Data were collected within the Heart Caravan Initiative (Paraíba, Brasil). Patients were divided into two study groups: Group 1 evaluated by a third year medical student (User 1), and an experienced nurse (User 2); Group 2 evaluated by User 2 and an Information Technology professional (User 3)...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28325024/balance-quality-assessment-as-an-early-indicator-of-physical-frailty-in-older-people
#3
Aly Chkeir, Doha Safieddine, D Bera, M Collart, J L Novella, M Drame, David J Hewson, Jacques Duchene
Frailty is an increasingly common geriatric condition that results in an increased risk of adverse health outcomes such as falls. The most widely-used means of detecting frailty is the Fried phenotype, which includes several objective measures such as grip strength and gait velocity. One method of screening for falls is to measure balance, which can be done by a range of techniques including the assessment of the Centre of Pressure (CoP) during a balance assessment. The Balance Quality Tester (BQT) is a device based on a commercial bathroom scale that can evaluate balance quality...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28325023/an-affordable-cuff-less-blood-pressure-estimation-solution
#4
Monika Jain, Niranjan Kumar, Sujay Deb
This paper presents a cuff-less hypertension pre-screening device that non-invasively monitors the Blood Pressure (BP) and Heart Rate (HR) continuously. The proposed device simultaneously records two clinically significant and highly correlated biomedical signals, viz., Electrocardiogram (ECG) and Photoplethysmogram (PPG). The device provides a common data acquisition platform that can interface with PC/laptop, Smart phone/tablet and Raspberry-pi etc. The hardware stores and processes the recorded ECG and PPG in order to extract the real-time BP and HR using kernel regression approach...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28325022/comparing-glucose-and-insulin-data-from-the-two-hour-oral-glucose-tolerance-test-in-metabolic-syndrome-subjects-and-marathon-runners
#5
Miguel Altuve, Gilberto Perpinan, Erika Severeyn, Sara Wong
Glucose is the main energy source of the body's cells and is essential for normal metabolism. Two pancreatic hormones, insulin and glucagon, are involved in glucose home-ostasis. Alteration in the plasma glucose and insulin concentrations could lead to distinct symptoms and diseases, ranging from mental function impairment to coma and even death. Type 2 diabetes, insulin resistance and metabolic syndrome are typical examples of abnormal glucose metabolism that increase the risk for cardiovascular disease and mortality...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28325015/estimating-apnea-hypopnea-index-only-from-an-accelerometer-signal-measured-on-the-chest
#6
Yasunobu Yamauchi, Sawa Fuke, Kanako Nakayama, Jun'ya Takakura, Hitoshi Usuniwa, Keiji Koike, Eriko Ouchi, Nagafumi Doi
Sleep apnea syndrome (SAS) is becoming a public concern in the field of preventive medicine because it causes more deleterious diseases. However, the majority of patients are not diagnosed and an easier-to-use, lower-cost device for screening of SAS is needed compared to the existing multimodal devices. In this study, we developed and tested a method to estimate the apnea-hypopnea index (AHI), which is the measure of severity of SAS, only from an accelerometer signal measured on the chest. Simultaneous recordings of overnight sleep polysomnography and accelerometer signal were conducted for 50 participants...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28324987/sleep-architecture-measurement-based-on-cardiorespiratory-parameters
#7
Alexander Tataraidze, Lyudmila Korostovtseva, Lesya Anishchenko, Mikhail Bochkarev, Yurii Sviryaev
This paper presents a method for the detection of wakeful state, rapid eye movement sleep (REM), light sleep (N1&N2) and deep sleep (N3&N4) based on cardiorespiratory parameters. Experiments were conducted with data of 625 subjects without sleep-disordered breathing selected from the SHHS dataset. Compared to previous studies, our method considers results of neighboring epochs classification and epoch position over record time. The method demonstrates Cohen's kappa of 0.57 ± 0.13 and the accuracy of 71.4 ± 8...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28324986/electrocardiographic-waveforms-fitness-check-device-technique-for-sudden-cardiac-death-risk-screening
#8
O J Escalona, M Mendoza
A novel cardiac health device technique development for reliable, non-invasive and cost-effective heart screening in preventive cardiovascular healthcare is presented. In particular, identification of apparently healthy individuals involved in sports activities (particularly in the young, age <; 35 years) who may be at-risk of sudden-cardiac-death (SCD) is mainly focused here. Nevertheless, the same device technique may be prospectively extended for detecting cardiovascular abnormalities in children and adolescents with type1-diabetes, and also in detecting patients with Brugada syndrome...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28324956/a-graphene-oxide-ph-sensor-for-wound-monitoring
#9
B Melai, P Salvo, N Calisi, L Moni, A Bonini, C Paoletti, T Lomonaco, V Mollica, R Fuoco, F Di Francesco
This article describes the fabrication and characterization of a pH sensor for monitoring the wound status. The pH sensitive layer consists of a graphene oxide (GO) layer obtained by drop-casting 5 μΐ of GO dispersion onto the working electrode of a screen-printed substrate. Sensitivity was 31.8 mV/pH with an accuracy of 0.3 unit of pH. Open-circuit potentiometry was carried out to measure pH in an exudate sample. The GO pH sensor proved to be reliable as the comparison with results obtained from a standard glass electrode pH-meter showed negligible differences (<; 0...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28324953/electrical-resistance-increases-at-the-tissue-electrode-interface-as-an-early-response-to-nucleus-accumbens-deep-brain-stimulation
#10
Rajas P Kale, Abbas Z Kouzani, Julian Berk, Ken Walder, Michael Berk, Susannah J Tye
The therapeutic actions of deep brain stimulation are not fully understood. The early inflammatory response of electrode implantation is associated with symptom relief without electrical stimulation, but is negated by anti-inflammatory drugs. Early excitotoxic necrosis and subsequent glial scarring modulate the conductivity of the tissue-electrode interface, which can provide some detail into the inflammatory response of individual patients. The feasibility of this was demonstrated by measuring resistance values across a bipolar electrode which was unilaterally implanted into the nucleus accumbens of a rat while receiving continuous deep brain stimulation with a portable back-mounted device using clinical parameters (130Hz, 200μA, 90μs) for 3 days...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28324886/the-effect-of-ovarian-cancer-screening-on-sexual-activity-and-functioning-results-from-the-uk-collaborative-trial-of-ovarian-cancer-screening-rct
#11
Lesley Fallowfield, Ivonne Solis-Trapala, Usha Menon, Carolyn Langridge, Shirley May, Ian Jacobs, Valerie Jenkins
BACKGROUND: To examine the impact of multimodal (MMS) and ultrasound (USS) screening on the sexual activity and functioning of 22 966 women in the UK Collaborative Trial of Ovarian Cancer Screening (UKCTOCS) RCT. METHODS: Fallowfield's Sexual Activity Questionnaire (FSAQ) was completed prior to randomisation, then annually in a random sample (RS) of women from MMS, USS and control groups. Any women in the study who required repeat screening due to unsatisfactory results formed an Events Sample (ES); they completed questionnaires following an event and annually thereafter...
March 21, 2017: British Journal of Cancer
https://www.readbyqxmd.com/read/28324882/liquid-based-endometrial-cytology-using-surepath%C3%A2-is-not-inferior-to-suction-endometrial-tissue-biopsy-in-clinical-performance-for-detecting-endometrial-cancer-including-atypical-endometrial-hyperplasia
#12
Fumiko Yanaki, Yasuo Hirai, Azusa Hanada, Ken Ishitani, Hideo Matsui
OBJECTIVE: We evaluated the clinical performance of liquid-based endometrial cytology (SurePath™) for detecting endometrial malignancies by comparison with the performance of suction endometrial tissue biopsy. STUDY DESIGN: From November 2011 to May 2013, we consecutively collected 1,118 liquid-based endometrial cytology specimens and 674 suction endometrial tissue biopsy specimens. RESULTS: The rate of nonpositive final histology in nonpositive liquid-based endometrial cytology (98...
March 22, 2017: Acta Cytologica
https://www.readbyqxmd.com/read/28324815/gender-and-race-ethnic-differences-in-the-persistence-of-alcohol-drug-and-poly-substance-use-disorders
#13
Elizabeth A Evans, Christine E Grella, Donna L Washington, Dawn M Upchurch
AIMS: To examine gender and racial/ethnic differences in the effect of substance use disorder (SUD) type on SUD persistence. METHODS: Data were provided by 1025 women and 1835 men from the National Epidemiologic Survey on Alcohol and Related Conditions (NESARC) to examine whether gender and race/ethnicity (Non-Hispanic White, Black, Hispanic) moderate the effects of DSM-IV defined past-12 month SUD type (alcohol, drug, poly-substance) on SUD persistence at 3-year follow-up, controlling for covariates...
March 7, 2017: Drug and Alcohol Dependence
https://www.readbyqxmd.com/read/28324813/among-patients-with-unhealthy-alcohol-use-those-with-hiv-are-less-likely-than-those-without-to-receive-evidence-based-alcohol-related-care-a-national-va-study
#14
Emily C Williams, Gwen T Lapham, Susan M Shortreed, Anna D Rubinsky, Jennifer F Bobb, Kara M Bensley, Sheryl L Catz, Julie E Richards, Katharine A Bradley
BACKGROUND: Alcohol use has important adverse effects on people living with HIV (PLWH). This study of patients with recognized unhealthy alcohol use estimated and compared rates of alcohol-related care received by PLWH and HIV- patients. METHODS: Outpatients from the Veterans Health Administration who had one or more positive screen(s) for unhealthy alcohol use (AUDIT-C≥5) documented in their medical records 10/2009-5/2013 were eligible. Primary and secondary outcomes were brief intervention documented ≤14days after a positive alcohol screen, and a composite measure of any alcohol-related care (brief intervention, specialty addictions treatment or pharmacotherapy documented ≤365 days), respectively...
March 6, 2017: Drug and Alcohol Dependence
https://www.readbyqxmd.com/read/28324707/chemical-structure-based-predictive-model-for-the-oxidation-of-trace-organic-contaminants-by-sulfate-radical
#15
Tiantian Ye, Zongsu Wei, Richard Spinney, Chong-Jian Tang, Shuang Luo, Ruiyang Xiao, Dionysios D Dionysiou
Second-order rate constants [Formula: see text] for the reaction of sulfate radical anion (SO4(•-)) with trace organic contaminants (TrOCs) are of scientific and practical importance for assessing their environmental fate and removal efficiency in water treatment systems. Here, we developed a chemical structure-based model for predicting [Formula: see text] using 32 molecular fragment descriptors, as this type of model provides a quick estimate at low computational cost. The model was constructed using the multiple linear regression (MLR) and artificial neural network (ANN) methods...
March 6, 2017: Water Research
https://www.readbyqxmd.com/read/28324694/screening-of-autism-based-on-task-free-fmri-using-graph-theoretical-approach
#16
Masoumeh Sadeghi, Reza Khosrowabadi, Fatemeh Bakouie, Hoda Mahdavi, Changiz Eslahchi, Hamidreza Pouretemad
Studies on autism spectrum disorder (ASD) have indicated several dysfunctions in the structure, and functional organization of the brain. However, findings have not been established as a general diagnostic tool yet. In this regard, current study proposed an automatic screening method for recognition of ASDs from healthy controls (HCs) based on their brain functional abnormalities. In this paradigm, brain functional networks of 60 adolescent and young adult males (29 ASDs and 31 HCs) were estimated from subjects' task-free fMRI data...
March 9, 2017: Psychiatry Research
https://www.readbyqxmd.com/read/28324660/single-and-combination-drug-screening-with-aqueous-biphasic-tumor-spheroids
#17
Pradip Shahi Thakuri, Hossein Tavana
Spheroids of cancer cells represent a physiologic model of solid tumors for cancer drug screening. Despite this known benefit, difficulties with generating large quantities of uniformly sized spheroids in standard plates, individually addressing spheroids with drug compounds, and quantitatively analyzing responses of cancer cells have hindered the use of spheroids in high-throughput screening applications. Recently, we addressed this challenge by using an aqueous two-phase system technology to generate a spheroid within an aqueous drop immersed in a second, immiscible aqueous phase...
March 1, 2017: SLAS Discov
https://www.readbyqxmd.com/read/28324622/screening-wild-and-semi-free-ranging-great-apes-for-putative-sexually-transmitted-diseases-evidence-of-trichomonadidae-infections
#18
Julie Rushmore, Andrew B Allison, Erin E Edwards, Ujwal Bagal, Sonia Altizer, Mike R Cranfield, Travis C Glenn, Hsi Liu, Antoine Mudakikwa, Lawrence Mugisha, Martin N Muller, Rebecca M Stumpf, Melissa Emery Thompson, Richard Wrangham, Michael J Yabsley
No abstract text is available yet for this article.
April 2017: American Journal of Primatology
https://www.readbyqxmd.com/read/28324614/fluorescence-based-high-throughput-and-targeted-image-acquisition-and-analysis-for-phenotypic-screening
#19
Manuel Gunkel, Jan Philipp Eberle, Holger Erfle
Applying the right acquisition method in a fluorescence imaging-based screening context is of great importance to obtain an appropriate readout and to select the right scale of the screen. In order to save imaging time and data, we have developed routines for multiscale targeted imaging, providing both a broad overview of a sample and additional in-depth information for targets of interest identified within the screen. These objects can be identified and acquired on-the-fly by an interconnection of image acquisition and image analysis...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28324501/assessing-telomerase-activities-in-mammalian-cells-using-the-quantitative-pcr-based-telomeric-repeat-amplification-protocol-qtrap
#20
Shuai Jiang, Mengfan Tang, Huawei Xin, Junjiu Huang
Telomerase expression and activity appear elevated in >80% of human cancers. The activity of the telomerase may serve as a diagnostic marker for malignancy, and an indicator of the proliferative potential of somatic and stem cells. The telomeric repeat amplification protocol (TRAP) is a sensitive and accurate PCR-based assay for telomerase detection and measurement. Here, we describe a quantitative PCR-based TRAP assay (qTRAP) that is more convenient and amenable to high-throughput applications compared to traditional gel-based TRAP assays...
2017: Methods in Molecular Biology
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