keyword
MENU ▼
Read by QxMD icon Read
search

machine

keyword
https://www.readbyqxmd.com/read/28103570/an-extreme-learning-machine-approach-to-density-estimation-problems
#1
Cristiano Cervellera, Danilo Maccio
In this paper, we discuss how the extreme learning machine (ELM) framework can be effectively employed in the unsupervised context of multivariate density estimation. In particular, two algorithms are introduced, one for the estimation of the cumulative distribution function underlying the observed data, and one for the estimation of the probability density function. The algorithms rely on the concept of $F$-discrepancy, which is closely related to the Kolmogorov-Smirnov criterion for goodness of fit. Both methods retain the key feature of the ELM of providing the solution through random assignment of the hidden feature map and a very light computational burden...
January 17, 2017: IEEE Transactions on Cybernetics
https://www.readbyqxmd.com/read/28103562/a-decision-support-system-for-tele-monitoring-copd-related-worrisome-events
#2
Mario Merone, Claudio Pedone, Giuseppe Capasso, Raffaele Antonelli Incalzi, Paolo Soda
Chronic Obstructive Pulmonary Disease (COPD) is a preventable, treatable and slowly progressive disease, whose course is aggravated by a periodic worsening of symptoms and lung function lasting for several days. The development of home telemonitoring systems has made possible to collect symptoms and physiological data in electronic records, boosting the development of decision support systems (DSSs). Current DSSs work with physiological measurements collected by means of several measuring and communication devices as well as with symptoms gathered by questionnaires submitted to COPD subjects...
January 17, 2017: IEEE Journal of Biomedical and Health Informatics
https://www.readbyqxmd.com/read/28103556/steerable-wavelet-machines-swm-learning-moving-frames-for-texture-classification
#3
Adrien Depeursinge, Zsuzsanna Puspoki, John Paul Ward, Michael Unser
We present texture operators encoding classspecific local organizations of image directions (LOID) in a rotation-invariant fashion. The LOIDs are key for visual understanding, and are at the origin of the success of the popular approaches such as local binary patterns (LBP) and the scaleinvariant feature transform (SIFT). Whereas LBPs and SIFT yield handcrafted image representations, we propose to learn dataspecific representations of the LOIDs in a rotation-invariant fashion. The image operators are based on steerable circular harmonic wavelets (CHW), offering a rich and yet compact initial representation for characterizing natural textures...
January 18, 2017: IEEE Transactions on Image Processing: a Publication of the IEEE Signal Processing Society
https://www.readbyqxmd.com/read/28103284/gene-expression-profiling-of-bronchoalveolar-lavage-cells-preceding-a-clinical-diagnosis-of-chronic-lung-allograft-dysfunction
#4
S Samuel Weigt, Xiaoyan Wang, Vyacheslav Palchevskiy, Aric L Gregson, Naman Patel, Ariss DerHovanessian, Michael Y Shino, David M Sayah, Shirin Birjandi, Joseph P Lynch, Rajan Saggar, Abbas Ardehali, David J Ross, Scott M Palmer, David Elashoff, John A Belperio
BACKGROUND: Chronic Lung Allograft Dysfunction (CLAD) is the main limitation to long-term survival after lung transplantation. Although CLAD is usually not responsive to treatment, earlier identification may improve treatment prospects. METHODS: In a nested case control study, 1-year post transplant surveillance bronchoalveolar lavage (BAL) fluid samples were obtained from incipient CLAD (n = 9) and CLAD free (n = 8) lung transplant recipients. Incipient CLAD cases were diagnosed with CLAD within 2 years, while controls were free from CLAD for at least 4 years following bronchoscopy...
2017: PloS One
https://www.readbyqxmd.com/read/28102956/experimental-verification-of-4d-monte-carlo-simulations-of-dose-delivery-to-a-moving-anatomy
#5
Sara Gholampourkashi, Miro Vujicic, Jason Belec, Joanna E Cygler, Emily Heath
PURPOSE: To evaluate a novel 4D Monte Carlo simulation tool by comparing calculations to physical measurements using a respiratory motion phantom. METHODS: We used a dynamic Quasar phantom in both stationary and breathing states (sinusoidal motion of amplitude of 1.8 cm and period of 3.3 s) for dose measurements on an Elekta Agility linear accelerator. Gafchromic EBT3 film and the RADPOS 4D dosimetry system were placed inside the lung insert of the phantom to measure dose profiles and point-dose values at the center of the spherical tumor inside the insert...
January 2017: Medical Physics
https://www.readbyqxmd.com/read/28102922/effect-of-the-unfilled-space-size-of-the-abutment-screw-access-hole-on-the-extruded-excess-cement-and-retention-of-single-implant-zirconia-crowns
#6
Sulieman S Al-Johany, Mohammad D Al Amri, Ahmed S Al-Bakri, Mohammed N Al-Qarni
PURPOSE: To evaluate in vitro the effect of the size of the unfilled space of the abutment screw access hole on the amount of extruded excess cement and the retention of zirconia copings. MATERIALS AND METHODS: Twelve dental implant replicas were attached to the corresponding abutments and embedded in acrylic resin blocks. A total of 36 CAD/CAM zirconia copings were fabricated by one technician using the standard technique. Abutments were divided into group I: the entire screw access channel was completely filled (nonspaced); group II: 1-mm-spaced; and group III: 2-mm-spaced...
January 19, 2017: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/28102825/versatile-modular-three-dimensional-microelectrode-arrays-for-neuronal-ensemble-recordings-from-design-to-fabrication-assembly-and-functional-validation-in-non-human-primates
#7
Falk Barz, Alessandro Livi, Marco Lanzilotto, Monica Maranesi, Luca Bonini, Oliver Paul, Patrick Ruther
<i>Objective. </i>Application-specific designs of electrode arrays offer an improved effectiveness for providing access to targeted brain regions in neuroscientific research and brain machine interfaces. The simultaneous and stable recording of neuronal ensembles is the main goal in the design of advanced neural interfaces. Here, we describe the development and assembly of highly customizable three-dimensional microelectrode arrays and demonstrate their recording performance in chronic applications in non-human primates...
January 19, 2017: Journal of Neural Engineering
https://www.readbyqxmd.com/read/28102696/compression-forces-used-in-the-norwegian-breast-cancer-screening-program
#8
Gunvor G Waade, Nataliia Moshina, Sofie Sæbuødegård, Peter Hogg, Solveig Hofvind
OBJECTIVES: Compression is used in mammography to reduce breast thickness, which is claimed to improve image quality and reduce radiation dose. In the XXX Breast Cancer Screening Program (XBCSP), the recommended range of compression force for full field digital mammography is 11-18 kg (108-177 Newton [N]). This is the first study to investigate the compression force used in the program. METHODS: The study included information from 17,951 randomly selected women screened with FFDM at 14 breast centres in the XBCSP, January-March 2014...
January 19, 2017: British Journal of Radiology
https://www.readbyqxmd.com/read/28102689/high-dimensional-atomistic-neural-network-potentials-for-molecule-surface-interactions-hcl-scattering-from-au-111
#9
Brian Kolb, Xuan Luo, Xueyao Zhou, Bin Jiang, Hua Guo
Ab initio molecular dynamics (AIMD) simulations of molecule-surface scattering allow first-principles characterization of the dynamics. However, the large number of density functional theory calculations along the trajectories are very costly, limiting simulations of long-time events. To avoid this computational bottleneck, we report here the development of a high-dimensional molecule-surface interaction potential energy surface (PES) with movable surface atoms, using a machine learning approach. With 60 degrees of freedom, this PES allows energy transfer between the impinging molecule and surface atoms...
January 19, 2017: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/28102269/from-morphogen-to-morphogenesis-and-back
#10
Darren Gilmour, Martina Rembold, Maria Leptin
A long-term aim of the life sciences is to understand how organismal shape is encoded by the genome. An important challenge is to identify mechanistic links between the genes that control cell-fate decisions and the cellular machines that generate shape, therefore closing the gap between genotype and phenotype. The logic and mechanisms that integrate these different levels of shape control are beginning to be described, and recently discovered mechanisms of cross-talk and feedback are beginning to explain the remarkable robustness of organ assembly...
January 18, 2017: Nature
https://www.readbyqxmd.com/read/28102005/blind-prediction-of-deleterious-amino-acid-variations-with-snps-go
#11
Emidio Capriotti, Pier Luigi Martelli, Piero Fariselli, Rita Casadio
: SNPs&GO is a machine learning method for predicting the association of single amino acid variations (SAVs) to disease, considering protein functional annotation. The method is a binary classifier that implements a Support Vector Machine algorithm to discriminate between disease-related and neutral SAVs. SNPs&GO combines information from protein sequence with functional annotation encoded by Gene Ontology terms. Tested in sequence mode on more than 38,000 SAVs from the SwissVar dataset, our method reached 81% overall accuracy and an area under the receiving operating characteristic curve (AUC) of 0...
January 19, 2017: Human Mutation
https://www.readbyqxmd.com/read/28101876/extraction-of-actionable-information-from-crowdsourced-disaster-data
#12
Rungsun Kiatpanont, Uthai Tanlamai, Prabhas Chongstitvatana
Natural disasters cause enormous damage to countries all over the world. To deal with these common problems, different activities are required for disaster management at each phase of the crisis. There are three groups of activities as follows: (1) make sense of the situation and determine how best to deal with it, (2) deploy the necessary resources, and (3) harmonize as many parties as possible, using the most effective communication channels. Current technological improvements and developments now enable people to act as real-time information sources...
November 2016: Journal of Emergency Management: JEM
https://www.readbyqxmd.com/read/28101400/choriocapillaris-evaluation-in-choroideremia-using-optical-coherence-tomography-angiography
#13
Simon S Gao, Rachel C Patel, Nieraj Jain, Miao Zhang, Richard G Weleber, David Huang, Mark E Pennesi, Yali Jia
The choriocapillaris plays an important role in supporting the metabolic demands of the retina. Studies of the choriocapillaris in disease states with optical coherence tomography angiography (OCTA) have proven insightful. However, image artifacts complicate the identification and quantification of the choriocapillaris in degenerative diseases such as choroideremia. Here, we demonstrate a supervised machine learning approach to detect intact choriocapillaris based on training with results from an expert grader...
January 1, 2017: Biomedical Optics Express
https://www.readbyqxmd.com/read/28101236/identification-of-proteins-associated-with-pediatric-bilateral-wilms-tumor
#14
Zechen Yan, Qingjun Meng, Jinjian Yang, Junjie Zhang, Wei Zhao, Fei Guo, Dongjian Song, Yuxiao Zhan, Dandan Fan, Ruiyi Zhou, Shuqiang Zuo, Zehua Wang, Jiekai Yu, Shu Zheng, Jiaxiang Wang
Wilms tumor (WT) is the most common cancer that primarily develops in abdominal solid organ of children. It has no incipient symptom, and the most frequent symptoms are a painless, palpable abdominal mass. Proteomics technology was used to select the differentially expressed proteins of bilateral Wilms tumor (BWT). Ten serum samples of children with BWT were chosen, 20 serum samples of children with unilateral WT (UWT) and 20 serum samples of healthy children were selected, and proteomics technology was used to detect and collect data...
December 2016: Oncology Letters
https://www.readbyqxmd.com/read/28100693/viral-genome-packaging-terminase-cleaves-dna-using-the-canonical-ruvc-like-two-metal-catalysis-mechanism
#15
Rui-Gang Xu, Huw T Jenkins, Maria Chechik, Elena V Blagova, Anna Lopatina, Evgeny Klimuk, Leonid Minakhin, Konstantin Severinov, Sandra J Greive, Alfred A Antson
Bacteriophages and large dsDNA viruses encode sophisticated machinery to translocate their DNA into a preformed empty capsid. An essential part of this machine, the large terminase protein, processes viral DNA into constituent units utilizing its nuclease activity. Crystal structures of the large terminase nuclease from the thermophilic bacteriophage G20c show that it is most similar to the RuvC family of the RNase H-like endonucleases. Like RuvC proteins, the nuclease requires either Mn(2+), Mg(2+) or Co(2+) ions for activity, but is inactive with Zn(2+) and Ca(2+) High resolution crystal structures of complexes with different metals reveal that in the absence of DNA, only one catalytic metal ion is accommodated in the active site...
January 18, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/28100101/espresso-coffee-foam-delays-cooling-of-the-liquid-phase
#16
Yasuhiro Arii, Kaho Nishizawa
Espresso coffee foam, called crema, is known to be a marker of the quality of espresso coffee extraction. However, the role of foam in coffee temperature has not been quantitatively clarified. In this study, we used an automatic machine for espresso coffee extraction. We evaluated whether the foam prepared using the machine was suitable for foam analysis. After extraction, the percentage and consistency of the foam were measured using various techniques, and changes in the foam volume were tracked over time...
January 19, 2017: Bioscience, Biotechnology, and Biochemistry
https://www.readbyqxmd.com/read/28100066/identification-of-eggs-from-different-production-systems-based-on-hyperspectra-and-cs-svm
#17
J Sun, S Cong, H Mao, X Zhou, X Wu, X Zhang
1. To identify the origin of table eggs more accurately, a method based on hyperspectral imaging technology was studied. 2. The hyperspectral data of 200 samples of intensive and extensive eggs were collected. Standard normalised variables (SNV) combined with Savitzky-Golay (SG) were used to eliminate noise, then stepwise regression (SWR) was used for feature selection. Grid search algorithm (GS), genetic search algorithm (GA), particle swarm optimisation algorithm (PSO) and cuckoo search algorithm (CS) were applied by support vector machine (SVM) to establish a SVM identification model with the optimal parameters...
January 19, 2017: British Poultry Science
https://www.readbyqxmd.com/read/28099527/the-association-between-osteoarthritis-and-occupational-clusters-in-the-korean-population-a-nationwide-study
#18
Hongdeok Seok, Sung Jae Choi, Jin-Ha Yoon, Gwan Gyu Song, Jong-Uk Won, Jae-Hoon Kim, Jaehoon Roh, Jae Hyun Jung
Osteoarthritis (OA) is a considerable health problem worldwide. It is known to be associated with certain occupational risk factors. We examined the prevalence rate of OA by occupational cluster. Data were collected from the Korea National Health and Nutrition Examination Surveys (2010-2013). The total number of unweighted sample size was 9,905 participants: 4,460 men and 5,445 women, and OA prevalence was 5.3% and 18.4% respectively. OA patients were defined as participants with knee/hip joint pain and radiographic change of knee/hip joint...
2017: PloS One
https://www.readbyqxmd.com/read/28099159/reducing-false-arrhythmia-alarm-rates-using-robust-heart-rate-estimation-and-cost-sensitive-support-vector-machines
#19
Qiang Zhang, Xianxiang Chen, Zhen Fang, Qingyuan Zhan, Ting Yang, Shanhong Xia
To lessen the rate of false critical arrhythmia alarms, we used robust heart rate estimation and cost-sensitive support vector machines. The PhysioNet MIMIC II database and the 2015 PhysioNet/CinC Challenge public database were used as the training dataset; the 2015 Challenge hidden dataset was for testing. Each record had an alarm labeled with asystole, extreme bradycardia, extreme tachycardia, ventricular tachycardia or ventricular flutter/fibrillation. Before alarm onsets, 300 s multimodal data was provided, including electrocardiogram, arterial blood pressure and/or photoplethysmogram...
January 18, 2017: Physiological Measurement
https://www.readbyqxmd.com/read/28098844/modeling-and-calibration-of-a-novel-one-mirror-galvanometric-laser-scanner
#20
Chengyi Yu, Xiaobo Chen, Juntong Xi
A laser stripe sensor has limited application when a point cloud of geometric samples on the surface of the object needs to be collected, so a galvanometric laser scanner is designed by using a one-mirror galvanometer element as its mechanical device to drive the laser stripe to sweep along the object. A novel mathematical model is derived for the proposed galvanometer laser scanner without any position assumptions and then a model-driven calibration procedure is proposed. Compared with available model-driven approaches, the influence of machining and assembly errors is considered in the proposed model...
January 15, 2017: Sensors
keyword
keyword
47491
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"