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https://www.readbyqxmd.com/read/28534806/feature-selection-for-nonstationary-data-application-to-human-recognition-using-medical-biometrics
#1
Majid Komeili, Wael Louis, Narges Armanfard, Dimitrios Hatzinakos
Electrocardiogram (ECG) and transient evoked otoacoustic emission (TEOAE) are among the physiological signals that have attracted significant interest in biometric community due to their inherent robustness to replay and falsification attacks. However, they are time-dependent signals and this makes them hard to deal with in across-session human recognition scenario where only one session is available for enrollment. This paper presents a novel feature selection method to address this issue. It is based on an auxiliary dataset with multiple sessions where it selects a subset of features that are more persistent across different sessions...
May 16, 2017: IEEE Transactions on Cybernetics
https://www.readbyqxmd.com/read/28532935/toric-outcomes-computer-assisted-registration-versus-intraoperative-aberrometry
#2
Jonathan D Solomon, John Ladas
PURPOSE: To compare refractive outcomes of intraoperative computer-assisted registration and intraoperative aberrometry for the reduction of cylinder during toric intraocular lens (IOL) placement. SETTING: Bowie Vision Institute, Bowie, Maryland, USA. DESIGN: Prospective randomized case series. METHOD: The patients were divided into 2 groups that had toric IOL implantation after phacoemulsification. The intraoperative computer-assisted registration group (Group 1) had preoperative toric calculations...
April 2017: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/28531157/hybrid-aware-model-for-senior-wellness-service-in-smart-home
#3
Yuchae Jung
Smart home technology with situation-awareness is important for seniors to improve safety and security. With the development of context-aware computing, wearable sensor technology, and ubiquitous computing, it is easier for seniors to manage their health problem in smart home environment. For monitoring senior activity in smart home, wearable, and motion sensors-such as respiration rate (RR), electrocardiography (ECG), body temperature, and blood pressure (BP)-were used for monitoring movements of seniors. For context-awareness, environmental sensors-such as gas, fire, smoke, dust, temperature, and light sensors-were used for senior location data collection...
May 22, 2017: Sensors
https://www.readbyqxmd.com/read/28523506/maldi-mass-spectrometry-profiling-and-imaging-applied-to-the-analysis-of-latent-fingermarks
#4
Robert Bradshaw
Latent fingermarks are derived from a transfer of material from the fingertips to a surface upon contact. Traditionally, fingermarks are employed for biometric identification of individuals based on matching of the pattern of the ridges. However, in recent years, there has been a stark increase in the use of advanced analytical techniques in order to obtain additional information, specifically the chemical composition of the residue. Understanding the complexity of the endogenous and exogenous content of fingermarks could be extremely useful in allowing further development of enhancement techniques currently used in forensic scenarios by identifying potential target molecules...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28522378/a-comparative-study-of-risk-factors-for-pancreatic-fistula-after-pancreatoduodenectomy-or-distal-pancreatectomy
#5
James M Halle-Smith, Eduardo Vinuela, Rachel M Brown, James Hodson, Zergham Zia, Simon R Bramhall, Ravi Marudanayagam, Robert P Sutcliffe, Darius F Mirza, Paolo Muiesan, John Isaac, Keith J Roberts
BACKGROUND: Evidence associates various biometric and histological variables such as steatosis and absence of fibrosis as risk factors for post-operative pancreatic fistula (POPF) after pancreatoduodenectomy (PD). Following distal pancreatectomy (DP), the association between these factors and POPF is less clear. This study of patients, drawn from the same background population, undergoing PD or DP at a single centre is a comparative study of the risk factors for POPF after these two operations...
May 15, 2017: HPB: the Official Journal of the International Hepato Pancreato Biliary Association
https://www.readbyqxmd.com/read/28514832/anti-obesity-effects-of-tea-from-mangifera-indica-l-leaves-of-the-ub%C3%A3-variety-in-high-fat-diet-induced-obese-rats
#6
Natalia Medina Ramírez, Renata C Lopes Toledo, Maria E Castro Moreira, Hércia Stampini Duarte Martino, Laércio Dos Anjos Benjamin, José H de Queiroz, Andréia Queiroz Ribeiro, Sônia Machado Rocha Ribeiro
Due to the high content of bioactive compounds, herbal teas are being investigated as adjuvant in chronic disease management. Studies have shown that mango leaf tea contain mangiferin, total phenolics and antioxidants, compounds with many functional properties. Therefore, this study aims to evaluate the anti-obesity effects of tea from Mangifera indica L. leaves, Ubá variety (TML), in obese rats fed a high-fat diet (HFD). For this, adult male Wistar rats were divided into three groups (n=8): the control group (fed AIN-93 diet), obese group (fed a HFD) and treated group (fed a HFD and supplemented with TML for 8 weeks)...
May 13, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28512630/hand-grasping-synergies-as-biometrics
#7
Vrajeshri Patel, Poojita Thukral, Martin K Burns, Ionut Florescu, Rajarathnam Chandramouli, Ramana Vinjamuri
Recently, the need for more secure identity verification systems has driven researchers to explore other sources of biometrics. This includes iris patterns, palm print, hand geometry, facial recognition, and movement patterns (hand motion, gait, and eye movements). Identity verification systems may benefit from the complexity of human movement that integrates multiple levels of control (neural, muscular, and kinematic). Using principal component analysis, we extracted spatiotemporal hand synergies (movement synergies) from an object grasping dataset to explore their use as a potential biometric...
2017: Frontiers in Bioengineering and Biotechnology
https://www.readbyqxmd.com/read/28508274/the-sleeping-remnant-effect-of-roux-en-y-gastric-bypass-on-plasma-levels-of-gastric-biomarkers-in-morbidly-obese-women-a-prospective-longitudinal-study
#8
Federico Marchesi, Francesco Tartamella, Giuseppina De Sario, Clarissa Forlini, Alberta Caleffi, Matteo Riccò, Francesco Di Mario
BACKGROUND: Morpho-functional modifications of the gastric remnant after Roux-en-Y gastric bypass (RYGB) have not been completely defined, due to its inaccessibility for bioptic mapping. The aim of the study is to evaluate such modifications using Gastropanel®, a non-invasive blood test cross-checking four gastric biomarkers, able to provide a snapshot of mucosa conditions. SUBJECTS AND METHODS: Twenty-four women undergoing RYGB were prospectively enrolled. Gastropanel® parameters (pepsinogens, Gastrin-17 and immunoglobulins against Helicobacter pylori), biometrical/clinical data were collected preoperatively and at 6-months follow-up...
May 15, 2017: Obesity Surgery
https://www.readbyqxmd.com/read/28504954/automatic-fetal-head-circumference-measurement-in-ultrasound-using-random-forest-and-fast-ellipse-fitting
#9
Jing Li, Yi Wang, Baiying Lei, Jie-Zhi Cheng, Jing Qin, Tianfu Wang, Shenli Li, Dong Ni
Head circumference (HC) is one of the most important biometrics in assessing fetal growth during prenatal ultrasound examinations. However, the manual measurement of this biometric by doctors often requires substantial experience. We developed a learning-based framework that used prior knowledge and employed a fast ellipse fitting method (ElliFit) to measure HC automatically. We first integrated the prior knowledge about the gestational age and ultrasound scanning depth into a random forest classifier to localize the fetal head...
May 12, 2017: IEEE Journal of Biomedical and Health Informatics
https://www.readbyqxmd.com/read/28503930/impact-of-a-plant-based-diet-and-support-on-mitigating-type-2-diabetes-mellitus-in-latinos-living-in-medically-underserved-areas
#10
Edelweiss Ramal, Andrea Champlin, Khaled Bahjri
PURPOSE: To determine the impact that a high-fiber, low-fat diet, derived from mostly plant-based sources, when coupled with support has upon self-management of type 2 diabetes mellitus in Latinos from medically underserved areas (MUAs). DESIGN: Experimental randomized controlled community pilot study. SETTING: Three community clinics in MUAs located within San Bernardino County, California. PARTICIPANTS: Thirty-two randomly assigned Latinos with A1C greater than 6...
January 1, 2017: American Journal of Health Promotion: AJHP
https://www.readbyqxmd.com/read/28503367/etiology-of-triarchic-psychopathy-dimensions-in-chimpanzees-pan-troglodytes
#11
Robert D Latzman, Christopher J Patrick, Hani J Freeman, Steven J Schapiro, William D Hopkins
The current study undertook analyses of genealogical data from a sample of 178 socially-housed chimpanzees (Pan troglodytes) with well-documented pedigrees, to clarify the etiologic bases of triarchic psychopathy dimensions and the influence of early social rearing experiences. Whereas biometric analyses for the full sample indicated significant heritability for the boldness dimension of psychopathy only, heritability estimates varied by early rearing, with all three triarchic dimensions showing significant heritabilities among mother-reared but not nursery-reared apes...
March 2017: Clinical Psychological Science
https://www.readbyqxmd.com/read/28491473/clinical-analysis-of-ocular-parameters-contributing-to-intraoperative-pain-during-standard-phacoemulsification
#12
Yong Koo Kang, Myung Jun Kim, Hong Kyun Kim, Bo Young Chun
Purpose. To study the correlation between ocular parameters and subjective pain that patients perceived during phacoemulsification. Methods. Medical records of 142 patients who underwent standard phacoemulsification under topical anesthesia between March and August 2016 were retrospectively reviewed. The pain during phacoemulsification and 1 h after surgery was assessed and compared using a visual analog scale. In addition, demographic data, preoperative biometric parameters, and intraoperative surgical parameters were recorded...
2017: Journal of Ophthalmology
https://www.readbyqxmd.com/read/28490331/quantifying-capture-stress-in-free-ranging-european-roe-deer-capreolus-capreolus
#13
Nikolaus Huber, Sebastian G Vetter, Alina L Evans, Petter Kjellander, Susanne Küker, Ulrika A Bergvall, Jon M Arnemo
BACKGROUND: To understand and reduce the concomitant effects of trapping and handling procedures in wildlife species, it is essential to measure their physiological impact. Here, we examined individual variation in stress levels in non-anesthetized European roe deer (Capreolus capreolus), which were captured in box traps and physically restrained for tagging, biometrics and bio-sampling. In winter 2013, we collected venous blood samples from 28 individuals during 28 capture events and evaluated standard measurements for stress (heart rate, body temperature, neutrophil to lymphocyte ratio, lactate and total cortisol)...
May 10, 2017: BMC Veterinary Research
https://www.readbyqxmd.com/read/28488803/promises-and-challenges-in-continuous-tracking-utilizing-amino-acids-in-skin-secretions-for-active-multi-factor-biometric-authentication-for-cybersecurity
#14
Juliana Agudelo, Vladimir Privman, Jan Halámek
We consider a new concept of biometric-based cybersecurity systems for active authentication by continuous tracking, which utilizes biochemical processing of metabolites present in skin secretions. Skin secretions contain a large number of metabolites and small molecules that can be targeted for analysis. Here we argue that amino acids found in sweat can be exploited for the establishment of an amino acid profile capable of identifying an individual user of a mobile or wearable device. Individual and combinations of amino acids processed by biocatalytic cascades yield physical (optical or electronic) signals, providing a time-series of several outputs that, in their entirety, should suffice to authenticate a specific user based on standard statistical criteria...
May 10, 2017: Chemphyschem: a European Journal of Chemical Physics and Physical Chemistry
https://www.readbyqxmd.com/read/28485827/correlation-between-pre-pregnancy-body-mass-index-and-maternal-visceral-adiposity-with-fetal-biometry-during-the-second-trimester
#15
Karina Rm Lopes, Alex Sandro R Souza, José N Figueiroa, João Guilherme B Alves
OBJECTIVE: To determine the correlation between pre-pregnancy body mass index (BMI) and maternal visceral adiposity with fetal biometry during the second trimester. METHODS: A cross-sectional observational study was conducted among pregnant women who received prenatal care at a center in Recife, Brazil, between October 3, 2011, and September 27, 2013. Pre-pregnancy BMI was determined at the first prenatal care visit. Maternal visceral adiposity and fetal biometry were measured at the same ultrasonography session...
May 9, 2017: International Journal of Gynaecology and Obstetrics
https://www.readbyqxmd.com/read/28483861/is-the-fvb-n-mouse-strain-truly-resistant-to-diet-induced-obesity
#16
Michelle Nascimento-Sales, Izabelle Fredo-da-Costa, Adriane C B Borges Mendes, Suzane Melo, Thais T Ravache, Thiago G B Gomez, Fernanda Gaisler-Silva, Miriam O Ribeiro, Arnaldo R Santos, Marcela S Carneiro-Ramos, Marcelo A Christoffolete
C57Bl/6J mice are the gold standard animal model of diet-induced obesity. These animals become obese with higher adiposity, blood fasting glucose, triglycerides, and total cholesterol when fed a high-fat diet (HFD). Conversely, the FVB/N mouse line is thought to be resistant to diet-induced obesity, with low or no weight gain and adiposity in response to a HFD In this study, we investigated whether FVB/N mice are resistant or susceptible to metabolic disorder that is promoted by a HFD Biometric parameters and blood chemistry were analyzed in C57Bl/6J and FVB/N mice that were fed a chow diet or HFD Glucose and insulin sensitivity were assessed by performing the glucose tolerance test and measuring serum insulin/glucose and homeostasis model assessment-insulin resistance...
May 2017: Physiological Reports
https://www.readbyqxmd.com/read/28480846/dependence-of-morphometric-parameters-of-the-dental-occlusion-on-the-type-of-the-lower-jaw-growth-in-children-with-class-ii1-dentofacial-anomalies-who-line-in-the-northern-ukraine
#17
L V Galich, V Kuroedova, Yu Lakhtin, L B Galich, P Moskalenko
The aim of the work was to study the structure of dentofacial anomalies in children and adolescents in Sumy city and Sumy oblast, to identify dentoalveolar morphological peculiarities of the occlusion in 10-13 years old patients with class ІІ1 anomalies according to Angle's classification with different types of lower jaw bone growth. A retrospective analysis of 2236 outpatient dental cards of urban and rural patients with orthodontic pathology was conducted. Patients were divided into three age groups: 6-9 years old (early mixed occlusion) - 592 children; 10-13 years old (late mixed occlusion) - 1180 children; over 13 years old (permanent occlusion) - 464 persons; besides 76 patients with class ІІ1 anomalies according to Angle's classification aged 10-13 years were examined...
March 2017: Georgian Medical News
https://www.readbyqxmd.com/read/28479712/tongue-prints-in-biometric-authentication-a-pilot-study
#18
Nadeem Jeddy, T Radhika, S Nithya
BACKGROUND AND OBJECTIVES: Biometric authentication is an important process for the identification and verification of individuals for security purposes. There are many biometric systems that are currently in use and also being researched. Tongue print is a new biometric authentication tool that is unique and cannot be easily forged because no two tongue prints are similar. The present study aims to evaluate the common morphological features of the tongue and its variations in males and females...
January 2017: Journal of Oral and Maxillofacial Pathology: JOMFP
https://www.readbyqxmd.com/read/28477206/on-biometric-systems-electrocardiogram-gaussianity-and-data-synthesis
#19
Wael Louis, Shahad Abdulnour, Sahar Javaher Haghighi, Dimitrios Hatzinakos
Electrocardiogram is a slow signal to acquire, and it is prone to noise. It can be inconvenient to collect large number of ECG heartbeats in order to train a reliable biometric system; hence, this issue might result in a small sample size phenomenon which occurs when the number of samples is much smaller than the number of observations to model. In this paper, we study ECG heartbeat Gaussianity and we generate synthesized data to increase the number of observations. Data synthesis, in this paper, is based on our hypothesis, which we support, that ECG heartbeats exhibit a multivariate normal distribution; therefore, one can generate ECG heartbeats from such distribution...
December 2017: EURASIP Journal on Bioinformatics & Systems Biology
https://www.readbyqxmd.com/read/28476078/stand-structure-recruitment-and-growth-dynamics-in-mixed-subalpine-spruce-and-swiss-stone-pine-forests-in-the-eastern-carpathians
#20
Ionel Popa, Constantin Nechita, Annika Hofgaard
Natural subalpine forests are considered to be sensitive to climate change, and forest characteristics are assumed to reflect the prevalent disturbance regime. We hypothesize that stand history determines different stand structures. Based on large full inventory datasets (including tree biometric data, spatial coordinates, tree age, and basal area increment) we assessed the size structure, tree recruitment dynamics and radial growth patterns in three permanent plots along an altitudinal gradient in a mixed coniferous forest (Picea abies and Pinus cembra) in the Eastern Carpathians...
May 1, 2017: Science of the Total Environment
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