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https://www.readbyqxmd.com/read/28650834/angle-2dpca-a-new-formulation-for-2dpca
#1
Quanxue Gao, Lan Ma, Yang Liu, Xinbo Gao, Feiping Nie
2-D principal component analysis (2DPCA), which employs squared F-norm as the distance metric, has been widely used in dimensionality reduction for data representation and classification. It, however, is commonly known that squared F-norm is very sensitivity to outliers. To handle this problem, we present a novel formulation for 2DPCA, namely Angle-2DPCA. It employs F-norm as the distance metric and takes into consideration the relationship between reconstruction error and variance in the objective function...
June 22, 2017: IEEE Transactions on Cybernetics
https://www.readbyqxmd.com/read/28636566/detection-of-muscle-gap-by-l-bia-in-muscle-injuries-clinical-prognosis
#2
L Nescolarde, J Yanguas, J Terricabras, H Lukaski, X Alomar, J Rosell-Ferrer, G Rodas
Sport-related muscle injury classifications are based basically on imaging criteria such as ultrasound (US) and magnetic resonance imaging (MRI) without consensus because of a lack of clinical prognostics for return-to-play (RTP), which is conditioned upon the severity of the injury, and this in turn with the muscle gap (muscular fibers retraction). Recently, Futbol Club Barcelona's medical department proposed a new muscle injury classification in which muscle gap plays an important role, with the drawback that it is not always possible to identify by MRI...
June 21, 2017: Physiological Measurement
https://www.readbyqxmd.com/read/28634783/the-treatment-for-the-first-branchial-cleft-anomalies-in-children
#3
Wei Liu, Min Chen, Jinsheng Hao, Yang Yang, Jie Zhang, Xin Ni
The objective of this study is to make a clinical analysis for first branchial cleft anomalies (FBCAs), especially introduce the relationship between the Type I/II FBCA with the facial nerve and to demonstrate the importance of using intraoperative microscope and facial nerve monitoring. This is a retrospective review of patients with FBCAs treated in Beijing Children's Hospital, from Jan 2013 to Dec 2015. Clinical data of patients, including sex, age, chief complains, history of surgery, incision and drainage, the relationship with the facial nerve, pre and post-operative facial paralysis, recurrent rate and complications were recorded...
June 20, 2017: European Archives of Oto-rhino-laryngology
https://www.readbyqxmd.com/read/28633776/bioabsorbable-calcaneo-stop-implant-for-the-treatment-of-flexible-flatfoot-a-retrospective-cohort-study-at-a-minimum-follow-up-of-4%C3%A2-years
#4
Sandro Giannini, Matteo Cadossi, Antonio Mazzotti, Valentina Persiani, Giuseppe Tedesco, Matteo Romagnoli, Cesare Faldini
Arthroereisis of the subtalar joint is a common surgical technique in Europe for the management of flexible flatfoot in the pediatric population. In most cases, it is performed using a calcaneo-stop metallic screw. Despite the good clinical results, screw removal is always advised after 2 to 3 years. The use of a bioabsorbable screw might overcome the need for a second operation to remove a nonabsorbable device. We report the results of a biodegradable calcaneo-stop screw at a minimum of 4 years of follow-up...
July 2017: Journal of Foot and Ankle Surgery: Official Publication of the American College of Foot and Ankle Surgeons
https://www.readbyqxmd.com/read/28628922/observation-of-three-component-fermions-in-the-topological-semimetal-molybdenum-phosphide
#5
B Q Lv, Z-L Feng, Q-N Xu, X Gao, J-Z Ma, L-Y Kong, P Richard, Y-B Huang, V N Strocov, C Fang, H-M Weng, Y-G Shi, T Qian, H Ding
In quantum field theory, Lorentz invariance leads to three types of fermion-Dirac, Weyl and Majorana. Although the existence of Weyl and Majorana fermions as elementary particles in high-energy physics is debated, all three types of fermion have been proposed to exist as low-energy, long-wavelength quasiparticle excitations in condensed-matter systems. The existence of Dirac and Weyl fermions in condensed-matter systems has been confirmed experimentally, and that of Majorana fermions is supported by various experiments...
June 19, 2017: Nature
https://www.readbyqxmd.com/read/28623387/retinal-vascular-geometry-and-6%C3%A2-year-incidence-and-progression-of-diabetic-retinopathy
#6
Carol Yim-Lui Cheung, Charumathi Sabanayagam, Antony Kwan-Pui Law, Neelam Kumari, Daniel Shu-Wei Ting, Gavin Tan, Paul Mitchell, Ching Yu Cheng, Tien Yin Wong
AIMS/HYPOTHESIS: We aimed to examine prospectively the association between a range of retinal vascular geometric variables measured from retinal photographs and the 6 year incidence and progression of diabetic retinopathy. METHODS: We conducted a prospective, population-based cohort study of Asian Malay individuals aged 40-80 years at baseline (n = 3280) who returned for a 6 year follow-up. Retinal vascular geometric variables (tortuosity, branching, fractal dimension, calibre) were measured from baseline retinal photographs using a computer-assisted program (Singapore I Vessel Assessment)...
June 16, 2017: Diabetologia
https://www.readbyqxmd.com/read/28622400/prevalence-of-malocclusion-and-distribution-of-occlusal-characteristics-in-13-to-18-year-old-adolescents-attending-selected-high-schools-in-the-municipality-of-san-juan-pr-2012-2013
#7
Karla Alvarado, Lydia López, Rosana Hanke, Francis Picón, Sona Rivas-Tumanyan
OBJECTIVE: A cross-sectional study was conducted (2012-2013) to evaluate the prevalence of 1) malocclusion and 2) occlusal characteristics in 13- to 18-yearold adolescents in San Juan, Puerto Rico (PR) from selected high schools in the municipality of San Juan. METHODS: The study sample consisted of 155 adolescents. The University of Puerto Rico's IRB approved the study and consent and assent were completed for or by each participant, as applicable. A calibrated dentist performed a single-visit dental evaluation at each school...
June 2017: Puerto Rico Health Sciences Journal
https://www.readbyqxmd.com/read/28617842/intra-individual-gait-patterns-across-different-time-scales-as-revealed-by-means-of-a-supervised-learning-model-using-kernel-based-discriminant-regression
#8
Fabian Horst, Alexander Eekhoff, Karl M Newell, Wolfgang I Schöllhorn
OBJECTIVE: Traditionally, gait analysis has been centered on the idea of average behavior and normality. On one hand, clinical diagnoses and therapeutic interventions typically assume that average gait patterns remain constant over time. On the other hand, it is well known that all our movements are accompanied by a certain amount of variability, which does not allow us to make two identical steps. The purpose of this study was to examine changes in the intra-individual gait patterns across different time-scales (i...
2017: PloS One
https://www.readbyqxmd.com/read/28617726/comparative-analysis-of-peripheral-corneal-geometry-in-health-and-keratoconus
#9
Enric Mas-Aixala, Joan Gispets, Núria Lupón, Genís Cardona
OBJECTIVES: To describe and compare corneal peripheral angles in normal and keratoconic eyes, to gain a better understanding of the topography of the periphery of the cornea in keratoconus and assist practitioners in the selection and fitting of large diameter contact lenses. METHODS: Eighty-eight eyes were included in the study, divided into three groups: healthy (A0, 28 eyes), keratoconus at stage I according to the Amsler-Krumeich classification (AI, 33 eyes) and keratoconus at stages II to IV (AII, 27 eyes)...
June 14, 2017: Eye & Contact Lens
https://www.readbyqxmd.com/read/28611962/clinical-results-of-complex-subtrochanteric-femoral-fractures-with-long-cephalomedullary-hip-nail
#10
Kwang-Kyoun Kim, Yougun Won, Danica H Smith, Gi-Soo Lee, Hee Young Lee
PURPOSE: Good results of the cephalomedullary nails have been reported in proximal femoral fractures recently. Based on length of nails and shape of screws fixed in a femoral head for proximal fragment fixation, the proper nail length was in dispute. The purpose of this study was to evaluate the clinical and radiological results of a long cephalomedullary hip nail for the treatment of comminuted subtrochanteric femoral fractures. MATERIALS AND METHODS: Twenty-one consecutive patients with severe subtrochanteric femoral fractures who had undergone intramedullary fixation using long-PFNA II between March 2010 and March 2013 were followed-up for over 12 months...
June 2017: Hip & Pelvis
https://www.readbyqxmd.com/read/28605674/a-procedure-to-detect-abnormal-sensorimotor-control-in-adolescents-with-idiopathic-scoliosis
#11
Jean-Philippe Pialasse, Pierre Mercier, Martin Descarreaux, Martin Simoneau
This work identifies, among adolescents with idiopathic scoliosis, those demonstrating impaired sensorimotor control through a classification procedure comparing the amplitude of their vestibular-evoked postural responses. The sensorimotor control of healthy adolescents (n=17) and adolescents with idiopathic scoliosis (n=52) with either mild (Cobb angle≥15° and ≤30°) or severe (Cobb angle >30°) spine deformation was assessed through galvanic vestibular stimulation. A classification procedure sorted out adolescents with idiopathic scoliosis whether the amplitude of their vestibular-evoked postural response was dissimilar or similar to controls...
June 4, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28605005/factors-predicting-the-outcomes-of-incomplete-triple-pelvic-osteotomy
#12
Engin Eceviz, Esat Uygur, Mehmet S Söylemez, Abdullah Eren
INTRODUCTION: In the present study, we identified factors affecting the outcomes of patients who underwent incomplete triple pelvic osteotomies due to acetabular dysplasia. METHODS: Data on a total of 58 hips in 50 patients for whom adequate data were available and who had undergone appropriate follow-up were retrospectively evaluated. We used Ömeroğlu scores for radiological evaluation, Harris Hip Scores for clinical evaluation, Tönnis scores to evaluate osteoarthritis progression and a modified Clavien-Dindo classification to evaluate complications...
June 6, 2017: Hip International: the Journal of Clinical and Experimental Research on Hip Pathology and Therapy
https://www.readbyqxmd.com/read/28597960/prevalence-of-malocclusion-in-individuals-with-and-without-intellectual-disability-a-comparative-study
#13
Joana P Cabrita, Maria de Fátima Bizarra, Sandra Ribeiro Graça
OBJECTIVE: The aim of this study was to compare the prevalence malocclusion between individuals with intellectual disability (ID) and a control group without disability (NID). METHODS: A total of 202 individuals (123 with ID and 79 with no impairment) were included in the study. Data were collected through oral examinations using the Angle classification of malocclusion and the dental aesthetic index (DAI). RESULTS: According to Angle's classification of malocclusion, it was found that 37...
June 9, 2017: Special Care in Dentistry
https://www.readbyqxmd.com/read/28589303/three-types-of-sagittal-alignment-regarding-compensation-in-asymptomatic-adults-the-contribution-of-the-spine-and-lower-limbs
#14
Hongda Bao, Renaud Lafage, Barthelemy Liabaud, Jonathan Elysée, Bassel G Diebo, Gregory Poorman, Cyrus Jalai, Peter Passias, Aaron Buckland, Shay Bess, Thomas Errico, Lawrence G Lenke, Munish Gupta, Han Jo Kim, Frank Schwab, Virginie Lafage
PURPOSE: A comprehensive understanding of normative sagittal profile is necessary for adult spinal deformity. Roussouly described four sagittal alignment types based on sacral slope, lumbar lordosis, and location of lumbar apex. However, the lower limb, a newly described component of spinal malalignment compensation, is missing from this classification. This study aims to propose a full-body sagittal profile classification in an asymptomatic population based on full-body imaging. METHODS: This is a retrospective analysis of a prospective single-center study of 116 asymptomatic volunteers...
June 6, 2017: European Spine Journal
https://www.readbyqxmd.com/read/28587475/management-of-severe-equinovalgus-in-patients-with-cerebral-palsy-by-naviculectomy-in-combination-with-midfoot-arthrodesis
#15
Chakravarthy U Dussa, Leonhard Döderlein, Raimund Forst, H Böhm, Albert Fujak
BACKGROUND: Equinovalgus deformity is the second most common deformity in cerebral palsy and may be flexible or rigid. Several operative methods from joint sparing to arthrodesis have been described with varying success rates. The aim of this study was to investigate the effectiveness of naviculectomy in combination with midfoot arthrodesis (talo-cuneiform and calcaneocuboid arthrodesis) in the correction of a rigid equinovalgus foot deformity in cerebral palsy. METHODS: Forty-eight rigid equinovalgus feet were operated upon in 30 patients from 2008 to 2013...
June 1, 2017: Foot & Ankle International
https://www.readbyqxmd.com/read/28587177/classification-of-k-pop-dance-movements-based-on-skeleton-information-obtained-by-a-kinect-sensor
#16
Dohyung Kim, Dong-Hyeon Kim, Keun-Chang Kwak
This paper suggests a method of classifying Korean pop (K-pop) dances based on human skeletal motion data obtained from a Kinect sensor in a motion-capture studio environment. In order to accomplish this, we construct a K-pop dance database with a total of 800 dance-movement data points including 200 dance types produced by four professional dancers, from skeletal joint data obtained by a Kinect sensor. Our classification of movements consists of three main steps. First, we obtain six core angles representing important motion features from 25 markers in each frame...
June 1, 2017: Sensors
https://www.readbyqxmd.com/read/28579153/outcomes-of-external-septorhinoplasty-in-a-turkish-male-population
#17
Gamze Didem Kilci, Engin Başer, Ayşegül Verim, Ömer Faruk Çalim, Bayram Veyseller, Orhan Özturan, Ahmet Altintaş, Mustafa Çelik
INTRODUCTION: The first and one of the most important steps in facial plastic surgery is accurate preoperative facial analysis and recording of data that may help the surgeon to check the outcomes of his/her techniques, promoting a surgeon's professional development. OBJECTIVE: To evaluate the esthetic outcomes of external septorhinoplasty (SRP) relevant to ethnic facial harmony and to investigate the relationship of the columellar incision scar with the type of skin and columellar incision type in a Turkish population...
May 20, 2017: Brazilian Journal of Otorhinolaryngology
https://www.readbyqxmd.com/read/28576702/operative-management-of-supracondylar-humeral-fractures-in-children-comparison-of-five-fixation-methods
#18
S Pesenti, A Ecalle, L Gaubert, E Peltier, E Choufani, E Viehweger, J-L Jouve, F Launay
BACKGROUND: The best method for stabilising supracondylar humeral fractures (SHFs) in children remains unclear. The objective of this study was to compare the outcomes of five different fixation methods for SHFs in children. HYPOTHESIS: Differences in intra-operative and short-term post-operative parameters can be demonstrated across different fixation methods for SHFs in children. PATIENTS AND METHODS: We reviewed the medical files of paediatric patients managed at our centre between 2006 and 2016 for SHF with major displacement (type 3 or 4 in the Lagrange-Rigault classification)...
May 30, 2017: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/28575327/interpreting-weightings-of-the-peer-assessment-rating-index-and-the-discrepancy-index-across-contexts-on-chinese-patients
#19
Siqi Liu, Heesoo Oh, David William Chambers, Tianmin Xu, Sheldon Baumrind
Objective: Determine optimal weightings of Peer Assessment Rating (PAR) index and Discrepancy Index (DI) for malocclusion severity assessment in Chinese orthodontic patients. Methods: Sixty-nine Chinese orthodontists assessed a full set of pre-treatment records from a stratified random sample of 120 subjects gathered from six university orthodontic centres. Using professional judgment as the outcome variable, multiple regression analyses were performed to derive customized weighting systems for the PAR index and DI, for all subjects and each Angle classification subgroup...
June 2, 2017: European Journal of Orthodontics
https://www.readbyqxmd.com/read/28574474/a-lidar-and-imu-integrated-indoor-navigation-system-for-uavs-and-its-application-in-real-time-pipeline-classification
#20
G Ajay Kumar, Ashok Kumar Patil, Rekha Patil, Seong Sill Park, Young Ho Chai
Mapping the environment of a vehicle and localizing a vehicle within that unknown environment are complex issues. Although many approaches based on various types of sensory inputs and computational concepts have been successfully utilized for ground robot localization, there is difficulty in localizing an unmanned aerial vehicle (UAV) due to variation in altitude and motion dynamics. This paper proposes a robust and efficient indoor mapping and localization solution for a UAV integrated with low-cost Light Detection and Ranging (LiDAR) and Inertial Measurement Unit (IMU) sensors...
June 2, 2017: Sensors
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