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https://www.readbyqxmd.com/read/28715442/combining-random-forest-with-multi-block-local-binary-pattern-feature-selection-for-multiclass-head-pose-estimation
#1
Min-Joo Kang, Jung-Kyung Lee, Je-Won Kang
A new head pose estimation technique based on Random Forest (RF) and texture features for facial image analysis using a monocular camera is proposed in this paper, especially about how to efficiently combine the random forest and the features. In the proposed technique a randomized tree with useful attributes is trained to improve estimation accuracy and tolerance of occlusions and illumination. Specifically, a number of features including Multi-scale Block Local Block Pattern (MB-LBP) are extracted from an image, and random features such as the MB-LBP scale parameters, a block coordinate, and a layer of an image pyramid in the feature pool are used for training the tree...
2017: PloS One
https://www.readbyqxmd.com/read/28705474/rf-ablation-in-periventricular-heterotopia-related-epilepsy
#2
Massimo Cossu, Laura Mirandola, Laura Tassi
Drug-resistant focal epilepsy is a common occurrence in patients with gray matter nodular heterotopia (NH), and surgical treatment is often considered in these cases. NH-related epileptogenicity is sustained by complex networks, which may involve the nodules and extralesional cortex in various combinations. Therefore, invasive EEG is usually required to identify the structures involved in seizure generation. It has been reported that surgery may be effective in cases with unilateral lesions, whereas bilateral cases are not optimal candidates for surgical success...
July 3, 2017: Epilepsy Research
https://www.readbyqxmd.com/read/28705106/characteristic-features-of-patients-with-multiple-accessory-pathways
#3
Michal Orczykowski, Pawel Derejko, Piotr Urbanek, Robert Bodalski, Joanna Zakrzewska-Koperska, Maria Bilińska, Lukasz Szumowski
Objective Only limited clinical and electrophysiological data concerning patients (pts) with multiple accessory pathways (MAP) in comparison to large control groups are available. The aim of our study was to analyse these data from the largest cohort of patients with multiple accessory pathways and a large control group. Method and results We analysed data from pts with MAP (group 1) and pts with a single accessory pathway (AP) (group 2) referred for radiofrequency catheter ablation (RFCA) at our tertiary centre...
July 14, 2017: Acta Cardiologica
https://www.readbyqxmd.com/read/28702051/random-forest-based-approach-for-maximum-power-point-tracking-of-photovoltaic-systems-operating-under-actual-environmental-conditions
#4
Hussain Shareef, Ammar Hussein Mutlag, Azah Mohamed
Many maximum power point tracking (MPPT) algorithms have been developed in recent years to maximize the produced PV energy. These algorithms are not sufficiently robust because of fast-changing environmental conditions, efficiency, accuracy at steady-state value, and dynamics of the tracking algorithm. Thus, this paper proposes a new random forest (RF) model to improve MPPT performance. The RF model has the ability to capture the nonlinear association of patterns between predictors, such as irradiance and temperature, to determine accurate maximum power point...
2017: Computational Intelligence and Neuroscience
https://www.readbyqxmd.com/read/28699345/nanostructural-tailoring-to-induce-flexibility-in-thermoelectric-ca3co4o9-thin-films
#5
Biplab Paul, Jun Lu, Per Eklund
Due to their inherent rigidity and brittleness, inorganic materials have seen limited use in flexible thermoelectric applications. On the other hand, for high output power density and stability, the use of inorganic materials is required. Here, we demonstrate a concept of fully-inorganic flexible thermoelectric thin films with Ca3Co4O9-on-mica. Ca3Co4O9 is promising not only due to its high Seebeck coefficient and good electrical conductivity but also important due to the abundance, low cost and nontoxicity of its constituent raw materials...
July 12, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28692957/passive-wearable-skin-patch-sensor-measures-limb-hemodynamics-based-on-electromagnetic-resonance
#6
Kim Cluff, Ryan A Becker, Balakumar Jayakumar, Kiyun Han, Ernie Condon, Kenneth Dudley, George Szatkowski, Iraklis I Pipinos, Ryan Z Amick, Jeremy Patterson
OBJECTIVE: The objectives of this study were to design and develop an open circuit electromagnetic resonant skin patch sensor, characterize the fluid volume and resonant frequency relationship and investigate the sensor's ability to measure limb hemodynamics and pulse volume waveform features. METHODS: The skin patch was designed from an open circuit electromagnetic resonant sensor comprised of a single baseline trace of copper configured into a square planar spiral which had a self-resonating response when excited by an external radio frequency (RF) sweep...
July 4, 2017: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/28672868/oxygen-partial-pressure-impact-on-characteristics-of-indium-titanium-zinc-oxide-thin-film-transistor-fabricated-via-rf-sputtering
#7
Ming-Hung Hsu, Sheng-Po Chang, Shoou-Jinn Chang, Wei-Ting Wu, Jyun-Yi Li
Indium titanium zinc oxide (InTiZnO) as the channel layer in thin film transistor (TFT) grown by RF sputtering system is proposed in this work. Optical and electrical properties were investigated. By changing the oxygen flow ratio, we can suppress excess and undesirable oxygen-related defects to some extent, making it possible to fabricate the optimized device. XPS patterns for O 1s of InTiZnO thin films indicated that the amount of oxygen vacancy was apparently declined with the increasing oxygen flow ratio...
June 26, 2017: Nanomaterials
https://www.readbyqxmd.com/read/28668725/patterns-of-cellular-phone-use-among-young-people-in-12-countries-implications-for-rf-exposure
#8
Chelsea E Langer, Patricia de Llobet, Albert Dalmau, Joe Wiart, Geertje Goedhart, Martine Hours, Geza P Benke, Evdoxia Bouka, Revital Bruchim, Kyung-Hwa Choi, Amanda Eng, Mina Ha, Maria Karalexi, Kosuke Kiyohara, Noriko Kojimahara, Daniel Krewski, Hans Kromhout, Brigitte Lacour, Andrea 't Mannetje, Milena Maule, Enrica Migliore, Charmaine Mohipp, Franco Momoli, Eleni Petridou, Katja Radon, Thomas Remen, Siegal Sadetzki, Malcolm R Sim, Tobias Weinmann, Roel Vermeulen, Elisabeth Cardis, Martine Vrijheid
Characterizing exposure to radiofrequency (RF) fields from wireless telecommunications technologies during childhood and adolescence is a research priority in investigating the health effects of RF. The Mobi-Expo study aimed to describe characteristics and determinants of cellular phone use in 534 young people (10-24years) in 12 countries. The study used a specifically designed software application installed on smartphones to collect data on the use of wireless telecommunications devices within this age group...
June 29, 2017: Environment International
https://www.readbyqxmd.com/read/28668430/pixel-wise-derivation-of-pulmonary-regurgitation-index-could-influence-clinical-decision-a-phase-contrast-mr-imaging-study-on-patients-with-repaired-tetralogy-of-fallot
#9
Pei-Hsin Wu, Hsiao-Wen Chung, Ming-Ting Wu, Cheng-Wen Ko
PURPOSE: Regurgitant fraction (RF) measured from 2D phase-contrast MRI has been used as a standard to quantitate the degree of pulmonary regurgitation and serves as a determinant indicator of prognosis for tetralogy of Fallot after surgical repair. This study demonstrated the potential underestimate of RF using the conventional definition and its impact on clinical decision when backward flow occurred during systolic periods. METHODS: Quantitative flow parameters, including forward flow volume (FFV), backward flow volume (BFV), and RF were estimated by two approaches: One derived from conventional ROI-averaged curve (bulk quantity) and the other in a pixel-wise manner to spatially reflect inhomogeneous flow profile (pixel-wise quantity)...
August 2017: European Journal of Radiology
https://www.readbyqxmd.com/read/28666407/small-rna-fragments-derived-from-multiple-rna-classes-the-missing-element-of-multi-omics-characteristics-of-the-hepatitis-c-virus-cell-culture-model
#10
Paulina Jackowiak, Anna Hojka-Osinska, Anna Philips, Agnieszka Zmienko, Lucyna Budzko, Patrick Maillard, Agata Budkowska, Marek Figlerowicz
BACKGROUND: A pool of small RNA fragments (RFs) derived from diverse cellular RNAs has recently emerged as a rich source of functionally relevant molecules. Although their formation and accumulation has been connected to various stress conditions, the knowledge on RFs produced upon viral infections is very limited. Here, we applied the next generation sequencing (NGS) to characterize RFs generated in the hepatitis C virus (HCV) cell culture model (HCV-permissive Huh-7.5 cell line). RESULTS: We found that both infected and non-infected cells contained a wide spectrum of RFs derived from virtually all RNA classes...
June 30, 2017: BMC Genomics
https://www.readbyqxmd.com/read/28645076/does-reflective-functioning-mediate-the-relationship-between-attachment-and-personality
#11
Maria Paola Nazzaro, Tommaso Boldrini, Annalisa Tanzilli, Laura Muzi, Guido Giovanardi, Vittorio Lingiardi
Mentalization, operationalized as reflective functioning (RF), can play a crucial role in the psychological mechanisms underlying personality functioning. This study aimed to: (a) study the association between RF, personality disorders (cluster level) and functioning; (b) investigate whether RF and personality functioning are influenced by (secure vs. insecure) attachment; and (c) explore the potential mediating effect of RF on the relationship between attachment and personality functioning. The Shedler-Westen Assessment Procedure (SWAP-200) was used to assess personality disorders and levels of psychological functioning in a clinical sample (N = 88)...
June 15, 2017: Psychiatry Research
https://www.readbyqxmd.com/read/28635046/three-year-outcomes-and-reconnection-patterns-after-initial-contact-force-guided-pulmonary-vein-isolation-for-paroxysmal-atrial-fibrillation
#12
Girish M Nair, Colin Yeo, Zachary MacDonald, Mark P Ainslie, Wael A Alqarawi, Pablo B Nery, Calum J Redpath, Mouhannad Sadek, Stewart Spence, Martin S Green, David H Birnie
BACKGROUND AND OBJECTIVE: Contact force (CF) sensing is a novel technology used for catheter ablation of atrial fibrillation (AF). We compared the single procedure success of CF-guided pulmonary vein isolation (PVI) with that of non-CF guided PVI during a three-year (1095 days) follow up period and analyzed the pattern of pulmonary vein (PV) reconnection. METHODS: A cohort of 167 subjects (68 CF vs. 99 Non-CF) with paroxysmal AF were included in the study. Atrial arrhythmia (AA) recurrence was defined as documented AF, atrial flutter, or atrial tachycardia lasting > 30 seconds and occurring after 90 days...
June 21, 2017: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/28628906/quadrupolar-nutation-nmr-to-discriminate-central-and-satellite-transitions-spectral-assignments-for-a-ziegler-natta-catalyst
#13
E S Merijn Blaakmeer, Wouter M J Franssen, Arno P M Kentgens
In this contribution we used solid state (35)Cl (I=3/2) quadrupolar NMR to study a MgCl2/2,2-dimethyl-1,3-dimethoxypropane (DMDOMe) adduct that serves as a model system for Ziegler-Natta catalysis. Employing large Radio-Frequency (RF) field strengths we observe three spectral features with strongly varying line widths. The assignment of the spectra is complicated because of the large difference in quadrupolar interactions experienced by the different sites in the system. The satellite transitions (ST) of relatively well-defined bulk Cl sites are partially excited and may overlap with the central transition (CT) resonances of more distorted surface sites...
June 7, 2017: Journal of Magnetic Resonance
https://www.readbyqxmd.com/read/28627924/clusters-of-financially-incentivized-chronic-pain-patients-using-the-minnesota-multiphasic-personality-inventory-2-restructured-form-mmpi-2-rf
#14
Luis E Aguerrevere, Matthew R Calamia, Kevin W Greve, Kevin J Bianchini, Kelly L Curtis, Veronica Ramirez
The Minnesota Multiphasic Personality Inventory (MMPI)-2 Restructured Form (MMPI-2-RF) has been shown to have clinical utility in the assessment of individuals with chronic pain (e.g., predicting surgical outcomes). The purpose of this study was to explore the ability of the MMPI-2-RF Validity Scales in profiling patients with chronic pain who had external financial incentive (e.g., workers' compensation claims) and determine the associations between Validity Scale response patterns and important outcomes. Cluster analysis identified 2 similarly sized clusters of patients with very different MMPI-2-RF profiles...
June 19, 2017: Psychological Assessment
https://www.readbyqxmd.com/read/28618858/equivalence-of-laptop-and-tablet-administrations-of-the-minnesota-multiphasic-personality-inventory-2-restructured-form
#15
William H Menton, Adam H Crighton, Anthony M Tarescavage, Ryan J Marek, Adam D Hicks, Yossef S Ben-Porath
The present study investigated the comparability of laptop computer- and tablet-based administration modes for the Minnesota Multiphasic Personality Inventory-2-Restructured Form (MMPI-2-RF). Employing a counterbalanced within-subjects design, the MMPI-2-RF was administered via both modes to a sample of college undergraduates ( N = 133). Administration modes were compared in terms of mean scale scores, internal consistency, test-retest consistency, external validity, and administration time. Mean scores were generally similar, and scores produced via both methods appeared approximately equal in terms of internal consistency and test-retest consistency...
June 1, 2017: Assessment
https://www.readbyqxmd.com/read/28612234/radical-pair-based-magnetoreception-in-birds-radio-frequency-experiments-and-the-role-of-cryptochrome
#16
Christine Nießner, Michael Winklhofer
The radical-pair hypothesis of magnetoreception has gained a lot of momentum, since the flavoprotein cryptochrome was postulated as a structural candidate to host magnetically sensitive chemical reactions. Here, we first discuss behavioral tests using radio-frequency magnetic fields (0.1-10 MHz) to specifically disturb a radical-pair-based avian magnetic compass sense. While disorienting effects of broadband RF magnetic fields have been replicated independently in two competing labs, the effects of monochromatic RF magnetic fields administered at the electronic Larmor frequency (~1...
June 13, 2017: Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology
https://www.readbyqxmd.com/read/28605130/effect-of-cocoa-s-theobromine-on-intestinal-microbiota-of-rats
#17
Sandra Martín-Peláez, Mariona Camps-Bossacoma, Malen Massot-Cladera, Mar Rigo-Adrover, Àngels Franch, Francisco J Pérez-Cano, Margarida Castell
SCOPE: To establish the role of cocoa theobromine on gut microbiota composition and fermentation products after cocoa consumption in rats. METHODS AND RESULTS: Lewis rats were fed either a standard diet (RF diet), a diet containing 10% cocoa (CC diet) or a diet including 0.25% theobromine (TB diet) for 15 days. Gut microbiota (fluorescence in situ hybridization coupled to flow cytometry and metagenomics analysis), SCFA and IgA-coated bacteria were analyzed in fecal samples...
June 12, 2017: Molecular Nutrition & Food Research
https://www.readbyqxmd.com/read/28585334/low-eddy-current-rf-shielding-enclosure-designs-for-3t-mr-applications
#18
Brian J Lee, Ronald D Watkins, Chen-Ming Chang, Craig S Levin
PURPOSE: Magnetic resonance-compatible medical devices operate within the MR environment while benefitting from the superior anatomic information of MRI. Avoiding electromagnetic interference between such instrumentation and the MR system is crucial. In this work, various shielding configurations for positron emission tomography (PET) detectors were studied and analyzed regarding radiofrequency (RF) shielding effectiveness and gradient-induced eddy current performances. However, the results of this work apply to shielding considerations for any MR-compatible devices...
June 6, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/28585268/pilot-scale-radio-frequency-blanching-of-potato-cuboids-heating-uniformity
#19
Zhenna Zhang, Chaofan Guo, Tong Gao, Hongfei Fu, Qin Chen, Yunyang Wang
BACKGROUND: Traditional hot water blanching has a slow heat transfer rate, while Radio frequency (RF) heating has the advantages of much faster heating rate and higher penetration depth. In this study, RF heating was applied to improve heating uniformity for the subsequent blanching experiments of potato cuboids. Potato cuboids were treated in a pilot-scale, 27.12 MHz, 6 KW RF heating system under different operating conditions. RESULTS: The dielectric constant increased firstly and then decreased with temperature, whereas loss factor increased as temperature increasing...
June 6, 2017: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/28584486/estimation-of-guggulsterone-e-and-z-in-the-guggul-based-commercial-formulations-using-high-performance-thin-layer-chromatography
#20
Pramod Kumar Sairkar, Anjana Sharma, N P Shukla
BACKGROUND: Guggulsterone (GS) is a plant steroid and bioactive compound present in gum Guggul of Commiphora wightii. An Indian herbal medicine system "Ayurveda" has a long history of use of gum Guggul and plant extract of C. wightii as medicine for the treatment of various illnesses. Complex nature, low availability, and inconsistency of phytoconstituents make its analysis of difficult tasks. AIMS: In this work, six different Guggul-based herbal formulations were examined for estimation of GS and their isomers (E and Z) through high-performance thin-layer chromatography technique...
January 2017: Journal of Pharmacy & Bioallied Sciences
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