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Dimensionality reduction

Enda King, Andrew Franklyn-Miller, Chris Richter, Eamon O'Reilly, Mark Doolan, Kieran Moran, Siobhan Strike, Éanna Falvey
BACKGROUND: Clinical assessments and rehabilitation in athletic groin pain (AGP) have focused on specific anatomical structures and uniplanar impairments rather than whole body movement. OBJECTIVE: To examine the effectiveness of rehabilitation that targeted intersegmental control in patients with AGP and to investigate post rehabilitation changes in cutting biomechanics. METHODS: Two hundred and five patients with AGP were rehabilitated focusing on clinical assessment of intersegmental control, linear running and change of direction mechanics in this prospective case series...
March 17, 2018: British Journal of Sports Medicine
Chenglin Luo, Jingjing Cao, Rui Peng, Qiaoyun Guo, Hua Ye, Peng Wang, Kaijuan Wang, Chunhua Song
Functional polymorphisms in Linc-ROR may change its ability of regulation by regulating Linc-ROR expression. However, these functional polymorphisms in Linc-ROR and their associations with breast cancer (BC) susceptibility were scarcely reported. In this molecular epidemiological study, four SNPs (rs6420545, rs4801078, rs1942348 and rs9636089) were selected in Linc-ROR by bioinformatics method. Unconditional logistic regression model was performed to analyze the associations between four SNPs and BC susceptibility adjusted for reproductive factors...
March 16, 2018: Scientific Reports
Xiaotian Lian, Jun Guo, Wei Zeng, Hai Qing, Rui Ju, Wei Tang
PURPOSE: The purpose of this study was to explore new landmark-independent methods suitable for determining the midsagittal plane (MSP) in patients with craniomaxillofacial trauma and its clinical application. MATERIALS AND METHODS: Preoperative computed tomography data of 25 patients with craniomaxillofacial trauma were imported into Mimics software (Materialise, Leuven, Belgium) to reconstruct 3-dimensional skull models. In the experimental group, the MSP was determined by different landmarks that were clear, were scattered, and did not have displacement according to the types of fractures...
February 20, 2018: Journal of Oral and Maxillofacial Surgery
Yoji Kawamura, Remi Tsubaki
We formulate a theory for the phase reduction of a beating flagellum. The theory enables us to describe the dynamics of a beating flagellum in a systematic manner using a single variable called the phase. The theory can also be considered as a phase reduction method for the limit-cycle solutions in infinite-dimensional dynamical systems, namely, the limit-cycle solutions to partial differential equations representing beating flagella. We derive the phase sensitivity function, which quantifies the phase response of a beating flagellum to weak perturbations applied at each point and at each time...
February 2018: Physical Review. E
Miloslav Pekař
Recently, a method based on non-equilibrium continuum thermodynamics which derives thermodynamically consistent reaction rate models together with thermodynamic constraints on their parameters was analyzed using a triangular reaction scheme. The scheme was kinetically of the first order. Here, the analysis is further developed for several first and second order schemes to gain a deeper insight into the thermodynamic consistency of rate equations and relationships between chemical thermodynamic and kinetics...
2018: Frontiers in Chemistry
Zishen Wang, Qin'e Zhang, Shichuan Long, Yangxi Luo, Peikai Yu, Zhibing Tan, Jie Bai, Baihua Qu, Yang Yang, Jia Shi, Hua Zhou, Zong-Yuan Xiao, Wenjing Hong, Hua Bai
We apply direct ink writing for the three-dimensional (3D) printing of polyaniline/reduced graphene oxide (PANI/RGO) with PANI/GO gel as printable ink. The PANI/GO gel inks for 3D printing are prepared via self-assembly of PANI and GO in a blend solvent of N-methyl-2-pyrrolidinone and water, and offer both shaping capability, self-sustainability, and electrical conductivity after reduction of GO. Interdigitated electrodes are fabricated by using the PANI/GO ink in 3D printing, and a planar solid-state supercapacitor is constructed, which exhibits high performance with specific capacitance of 1329 mF cm-2...
March 15, 2018: ACS Applied Materials & Interfaces
Wei Wang, Yan Yan, Feiping Nie, Shuicheng Yan, Nicu Sebe
Graph-based dimensionality reduction techniques have been widely and successfully applied to clustering and classification tasks. The basis of these algorithms is the constructed graph which dictates their performance. In general, the graph is defined by the input affinity matrix. However, the affinity matrix derived from the data is sometimes suboptimal for dimension reduction as the data used are very noisy. To address this issue, we propose the projective unsupervised flexible embedding models with optimal graph (PUFE-OG)...
June 2018: IEEE Transactions on Image Processing: a Publication of the IEEE Signal Processing Society
John W Garrett, Yinsheng Li, Ke Li, Guang-Hong Chen
PURPOSE: Digital breast tomosynthesis (DBT) has been shown to somewhat alleviate the breast tissue overlapping issues of two dimensional (2D) mammography.However, the improvement in current DBT systems over mammography is still limited.Statistical image reconstruction (SIR) methods have the potential to reduce through-plane artifacts in DBT, and thus may be used to further reduce anatomical clutter. The purpose of this work was to study the impact of SIR on anatomical clutter in the reconstructed DBT image volumes...
March 15, 2018: Medical Physics
Paul M Barlow, Stanley A Leake, Michael N Fienen
The term capture, related to the source of water derived from wells, has been used in two distinct yet related contexts by the hydrologic community. The first is a water-budget context, in which capture refers to decreases in the rates of groundwater outflow and (or) increases in the rates of recharge along head-dependent boundaries of an aquifer in response to pumping. The second is a transport context, in which capture zone refers to the specific flowpaths that define the three-dimensional, volumetric portion of a groundwater flow field that discharges to a well...
March 15, 2018: Ground Water
Zaineb Al-Qazwini, Zhen Yu Gordon Ko, Kalpesh Mehta, Nanguang Chen
We report an ultrahigh-speed and high-resolution line-scan spectral-domain optical coherence tomography (SD-OCT) system that integrates a number of mechanisms for improving image quality. The illumination uniformity is significantly improved by the use of a Powell lens; Phase stepping and differential reconstruction are combined to suppress autocorrelation artifacts; Nonlocal means (NLM) is employed to enhance the signal to noise ratio while minimizing motion artifacts. The system is capable of acquiring cross-sectional images at more than 3,500 B-scans per second with sensitivities between 70dB and 90dB...
March 1, 2018: Biomedical Optics Express
Mei Wang, Vijayasankar Raman, Jianping Zhao, Bharathi Avula, Yan-Hong Wang, Philip L Wylie, Ikhlas A Khan
Correct identification of the true bay leaf ( Laurus nobilis ) and its substitutes is important not only for the quality control of the products, but also for the safety of the consumers. L. nobilis is often substituted or confused with other species, such as Cinnamomum tamala, Pimenta racemosa, Syzygium polyanthum , and Umbellularia californica. In the present study, the potential of gas chromatography combined with quadrupole time-of-flight mass spectrometry for the profiling of various bay leaf products was evaluated for the first time...
March 14, 2018: Planta Medica
Keyvan Jabbari, Fakhereh Pashaei, Mohammad R Ay, Alireza Amouheidari, Mohammad B Tavakoli
Background: MapCHECK2 is a two-dimensional diode arrays planar dosimetry verification system. Dosimetric results are evaluated with gamma index. This study aims to provide comprehensive information on the impact of various factors on the gamma index values of MapCHECK2, which is mostly used for IMRT dose verification. Methods: Seven fields were planned for 6 and 18 MV photons. The azimuthal angle is defined as any rotation of collimators or the MapCHECK2 around the central axis, which was varied from 5 to -5°...
January 2018: Journal of Medical Signals and Sensors
Cheryl Lynn Wolverton, Sue Lasiter, Joanne R Duffy, Michael T Weaver, Anna M McDaniel
Objectives: The overall purpose of this study was to evaluate the validity and reliability of the Caring Assessment Tool-Administration survey. Three specific aims were to (1) evaluate construct validity of the Caring Assessment Tool-Administration survey by testing the hypothesized eight-factor structure of staff nurses' perceptions of nurse manager caring behaviors, (2) estimate the internal consistency, and (3) conduct item reduction analysis. Methods: A 94-item Caring Assessment Tool-Administration designed to assess nurse manager caring behaviors appeared in the literature but lacked robust psychometric testing...
2018: SAGE Open Medicine
Carla Appelgrein, Mark R Glyde, Giselle Hosgood, Alasdair R Dempsey, Sarah Wickham
OBJECTIVE:  This article aims to investigate the effect of a decrease in the A-frame angle of incline on the highest carpal extension angle in agility dogs. METHODS:  Kinematic gait analysis (two-dimensional) measuring carpal extension was performed on 40 dogs entering the A-frame at 3 angles of incline: 40° (standard), 35° and 30°. The highest carpal extension angle from three trials at each incline was examined for a significant effect of A-frame angle with height, body weight and velocity included as covariates...
February 2018: Veterinary and Comparative Orthopaedics and Traumatology: V.C.O.T
Sadia Kabir, Kateryna Artyushkova, Alexey Serov, Plamen Atanassov
This study elucidates the synthesis-structure-property correlations of nitrogen moieties present in nitrogen functionalized graphene nanomaterials towards oxygen reduction reactions and their electrochemical pathways in acidic and alkaline electrolytes. Porous three-dimensional nitrogen-doped graphene nanosheets (N/3D-GNS) were fabricated using the Sacrificial Support Method (SSM) and doped with nitrogen using 10 at.% NH3 under thermal pyrolysis at T= 650°C, 850°C and 1050°C for evaluating the nitrogen species formed under different temperatures...
March 13, 2018: ACS Applied Materials & Interfaces
Cristiano Tomasi, Mauro Donati, Denis Cecchinato, Isacco Szathvary, Enrico Corrà, Jan Lindhe
OBJECTIVE: To examine if (i) characteristics of the fresh extraction socket site influenced subsequent dimensional alterations and (ii) placement of deproteinized bovine mineral in the socket affected volumetric change during healing. MATERIALS AND METHODS: Twenty seven subjects and 28 extraction sites were included. Immediately after the removal of the tooth and after 6 months of healing, stone and virtual models of the jaw were produced. A cone beam computerized tomography scan was obtained immediately after extraction and the thickness of the buccal bone wall at the extraction site was measured...
March 13, 2018: Clinical Oral Implants Research
Jejo D Koola, Sharon E Davis, Omar Al-Nimri, Sharidan K Parr, Daniel Fabbri, Bradley A Malin, Samuel B Ho, Michael E Matheny
OBJECTIVE: Hepatorenal Syndrome (HRS) is a devastating form of acute kidney injury (AKI) in advanced liver disease patients with high morbidity and mortality, but phenotyping algorithms have not yet been developed using large electronic health record (EHR) databases. We evaluated and compared multiple phenotyping methods to achieve an accurate algorithm for HRS identification. MATERIALS AND METHODS: A national retrospective cohort of patients with cirrhosis and AKI admitted to 124 Veterans Affairs hospitals was assembled from electronic health record data collected from 2005 to 2013...
March 9, 2018: Journal of Biomedical Informatics
Stavros Dimitriadis, Fares Qeadan, Christopher L Taylor, Howard Yonas, Andrew P Carlson
BACKGROUND: Middle cerebral artery (MCA) aneurysms continue to be viewed by many as primarily surgical entities. OBJECTIVE: To introduce a new, easily measurable dimension termed "neck overhang," defined as the amount of the aneurysm that extends proximal to the 2 dimensionally defined "neck" and to evaluate the utility of the intersecting clipping technique (use of straight clip and intersecting fenestrated clip) to adapt to this overhanging segment's specific dimensions and achieve better obliteration of the MCA aneurysms...
February 26, 2018: Operative Neurosurgery (Hagerstown, Md.)
Zhen Chen, Pei Zhao, Fuyi Li, André Leier, Tatiana T Marquez-Lago, Yanan Wang, Geoffrey I Webb, A Ian Smith, Roger J Daly, Kuo-Chen Chou, Jiangning Song
Summary: Structural and physiochemical descriptors extracted from sequence data have been widely used to represent sequences and predict structural, functional, expression and interaction profiles of proteins and peptides as well as DNAs/RNAs. Here, we present iFeature, a versatile Python-based toolkit for generating various numerical feature representation schemes for both protein and peptide sequences. iFeature is capable of calculating and extracting a comprehensive spectrum of 18 major sequence encoding schemes that encompass 53 different types of feature descriptors...
March 8, 2018: Bioinformatics
David S Choi, Nirakar Poudel, Saungeun Park, Deji Akinwande, Stephen B Cronin, Kenji Watanabe, Takashi Taniguchi, Zhen Yao, Li Shi
Scanning Thermal Microscopy (SThM) measurements reveal a significant thermal benefit of including a high thermal conductivity hexagonal boron nitride (h-BN) heat-spreading layer between graphene and either an SiO2 /Si substrate or a 100 μm thick Corning® flexible Willow® Glass (WG) substrate. At the same power density, an 80 nm thick h-BN layer on the silicon substrate can yield a factor of 2.2 reduction of the hot spot temperature, while a 35 nm thick h-BN layer on the WG substrate is sufficient to obtain a factor of 4...
March 12, 2018: ACS Applied Materials & Interfaces
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