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https://www.readbyqxmd.com/read/28749579/a-new-type-of-neurons-for-machine-learning
#1
Fenglei Fan, Wenxiang Cong, Ge Wang
In machine learning, the use of an artificial neural network is the mainstream approach. Such a network consists of layers of neurons. These neurons are of the same type characterized by the two features: (1) an inner product of an input vector and a matching weighting vector of trainable parameters and (2) a nonlinear excitation function. Here we investigate the possibility of replacing the inner product with a quadratic function of the input vector, thereby upgrading the 1(st) order neuron to the 2(nd) order neuron, empowering individual neurons, and facilitating the optimization of neural networks...
July 27, 2017: International Journal for Numerical Methods in Biomedical Engineering
https://www.readbyqxmd.com/read/28749566/the-facilitators-and-barriers-of-physical-activity-among-aboriginal-and-torres-strait-islander-regional-sport-participants
#2
Claudie Péloquin, Thomas Doering, Stephanie Alley, Amanda Rebar
BACKGROUND: Disparities in health perspectives between Indigenous and non-Indigenous populations are major concerns in many of the world's well-developed nations. Indigenous populations are largely less healthy, more prone to chronic diseases, and have an earlier overall mortality than non-Indigenous populations. Low levels of physical activity (PA) contribute to the high levels of disease in Indigenous Australians. METHOD: Qualitative analysis of structured one-on-one interviews discussing PA in a regional setting...
July 27, 2017: Australian and New Zealand Journal of Public Health
https://www.readbyqxmd.com/read/28749455/primary-biliary-cholangitis-alters-functional-connections-of-the-brain-s-deep-gray-matter
#3
Victoria A L Mosher, Mark G Swain, Jack X Q Pang, Gilaad G Kaplan, Keith A Sharkey, Glenda M MacQueen, Bradley G Goodyear
OBJECTIVES: Fatigue, itch, depressed mood, and cognitive impairment significantly impact the quality of life of many patients with primary biliary cholangitis (PBC). Previous neuroimaging studies of non-hepatic diseases suggest that these symptoms are often associated with dysfunction of deep gray matter brain regions. We used resting-state functional magnetic resonance imaging (rsfMRI) to determine whether PBC patients exhibit altered functional connections of deep gray matter. METHODS: Twenty female non-cirrhotic PBC patients and 21 age/gender-matched controls underwent rsfMRI...
July 27, 2017: Clinical and Translational Gastroenterology
https://www.readbyqxmd.com/read/28749398/f-wave-index-a-diagnostic-tool-for-peripheral-neuropathy
#4
G R Sathya, N Krishnamurthy, Susheela Veliath, Jayanthi Arulneyam, J Venkatachalam
BACKGROUND & OBJECTIVES: Each skeletal muscle is usually supplied by two or more nerve roots and if one nerve root is affected and the other is spared, the clinically used F wave minimum latency can still be normal. An F wave index was constructed taking into consideration the other parameters of the F wave such as persistence, chronodispersion, latency, arm-length to determine its usefulness in the diagnosis of peripheral neuropathy. This study was undertaken to construct the F wave index in the upper limb for the median nerve in normal healthy adult males and in patients with peripheral neuropathy and to compare the values obtained in both groups...
March 2017: Indian Journal of Medical Research
https://www.readbyqxmd.com/read/28749373/dosimetric-evaluation-of-a-commercial-proton-spot-scanning-monte-carlo-dose-algorithm-comparisons-against-measurements-and-simulations
#5
Jatinder Saini, Dominic Maes, Alexander Egan, Stephen R Bowen, Sara St James, Martin Janson, Tony Wong, Charles Bloch
RaySearch Americas Inc. (NY) has introduced a commercial Monte Carlo dose algorithm (RS-MC) for routine clinical use in proton spot scanning. In this report, we provide a validation of this algorithm against phantom measurements and simulations in GATE/GEANT4 software package. We also compared the performance of RayStation analytical algorithm (RS-PBA) against the RS-MC algorithm. Methods: A beam model (G-MC) for spot scanning gantry at our proton center was implemented in the GATE software package. The model was validated against measurements in a water phantom and was used for benchmarking the RS-MC...
July 27, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28749352/example-based-image-colorization-using-locality-consistent-sparse-representation
#6
Bo Li, Fuchen Zhao, Zhuo Su, Xiangguo Liang, Yu-Kun Lai, Paul L Rosin
Image colorization aims to produce a natural looking color image from a given grayscale image, which remains a challenging problem. In this paper, we propose a novel examplebased image colorization method exploiting a new locality consistent sparse representation. Given a single reference color image, our method automatically colorizes the target grayscale image by sparse pursuit. For efficiency and robustness, our method operates at the superpixel level. We extract low-level intensity features, mid-level texture features and high-level semantic features for each superpixel, which are then concatenated to form its descriptor...
July 26, 2017: IEEE Transactions on Image Processing: a Publication of the IEEE Signal Processing Society
https://www.readbyqxmd.com/read/28749342/broadband-vibration-detection-in-tissue-phantoms-using-a-fiber-fabry-perot-cavity
#7
Jack Barnes, Sijia Li, Apoorv Goyal, Purang Abolmaesumi, Parvin Mousavi, Hans-Peter Loock
A fiber optic vibration sensor is developed and characterized with an ultra-wide dynamic sensing range, from less than 1 Hz to clinical ultrasound frequencies near 6 MHz. The vibration sensor consists of a matched pair of fiber Bragg gratings coupled to a custom-built signal processing circuit. The wavelength of a laser diode is locked to one of the many cavity resonances using the Pound-Drever-Hall scheme. A calibrated piezoelectric vibration element was used to characterize the sensor's strain, temperature, and noise responses...
July 24, 2017: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/28749318/probabilistic-linkage-to-enhance-deterministic-algorithms-and-reduce-data-linkage-errors-in-hospital-administrative-data
#8
Gareth Hagger-Johnson, Katie Harron, Harvey Goldstein, Robert Aldridge, Ruth Gilbert
 BACKGROUND: The pseudonymisation algorithm used to link together episodes of care belonging to the same patients in England (HESID) has never undergone any formal evaluation, to determine the extent of data linkage error. OBJECTIVE: To quantify improvements in linkage accuracy from adding probabilistic linkage to existing deterministic HESID algorithms. METHODS: Inpatient admissions to NHS hospitals in England (Hospital Episode Statistics, HES) over 17 years (1998 to 2015) for a sample of patients (born 13/28th of months in 1992/1998/2005/2012)...
June 30, 2017: Journal of Innovation in Health Informatics
https://www.readbyqxmd.com/read/28749110/haplotype-analysis-of-mdr1-and-risk-for-cervical-cancer-in-northeastern-thailand
#9
Sophida Phuthong, Wannapa Settheetham-Ishida, Sitakan Natphopsuk, Dariwan Settheetham, Takafumi Ishida
Objective: The aim of this study was to investigate the association between genotype and haplotype of MDR1 (C1236T, G2677T/A and C3435T) and the risk for cervical cancer in Northeastern Thai women. Methods: An age-matched case-control study involving squamous cell cervical cancer (SCCA) patients (n=204) and healthy controls (n=204) was enrolled for MDR1 genotyping by real-time PCR method. Results: The genotype distribution of MDR1 in both patients and controls was not significantly different (p>0.05). The haplotype analysis showed that T-T-T was the most common haplotype in this population...
July 27, 2017: Asian Pacific Journal of Cancer Prevention: APJCP
https://www.readbyqxmd.com/read/28749090/relationships-of-cerebrospinal-fluid-monoamine-metabolite-levels-with-clinical-variables-in-major-depressive-disorder
#10
Hyung Shin Yoon, Kotaro Hattori, Shintaro Ogawa, Daimei Sasayama, Miho Ota, Toshiya Teraishi, Hiroshi Kunugi
OBJECTIVE: Many studies have investigated cerebrospinal fluid (CSF) monoamine metabolite levels in depressive disorders. However, their clinical significance is still unclear. We tried to determine whether CSF monoamine metabolite levels could be a state-dependent marker for major depressive disorder (MDD) based on analyses stratified by clinical variables in a relatively large sample. METHODS: Subjects were 75 patients with MDD according to DSM-IV criteria and 87 healthy controls, matched for age, sex, and ethnicity (Japanese)...
July 25, 2017: Journal of Clinical Psychiatry
https://www.readbyqxmd.com/read/28749082/impact-of-warm-ischemia-time-on-postoperative-renal-function-after-partial-nephrectomy-for-clinical-t1-renal-cell-carcinoma-a-propensity-score-matched-study
#11
Hakmin Lee, Byung Do Song, Seok-Soo Byun, Sang Eun Lee, Sung Kyu Hong
OBJECTIVES: To preserve renal function, partial nephrectomy (PN) is recommended to patients with small renal masses. However, controversy still exists as to whether prolonged ischemia time adversely affects the incidence of chronic kidney disease (CKD) after PN. We analyzed the effect of prolonged warm ischemia time (WIT) on long-term renal function following PN. MATERIALS AND METHODS: We reviewed data from 1,816 patients who underwent PN for clinical T1 renal tumor...
July 27, 2017: BJU International
https://www.readbyqxmd.com/read/28749062/the-art-of-the-cover
#12
Nora Porter
Often, it's difficult to match up our cover artwork with the subjects of our lead articles and special reports. Of necessity, we sometimes turn to pure abstraction. How else to illustrate technical policy articles on subjects such as changing research protocols or informed consent, or abstract ideas like congruence, duality, imbalance, causality? At such times, we have to be pretty creative, and my search for cover art can be long and challenging. In the end, we hope that the reader will make the connection between cover and content...
July 2017: Hastings Center Report
https://www.readbyqxmd.com/read/28749060/artificial-wombs-and-abortion-rights
#13
I Glenn Cohen
In a study published in late April in Nature Communications, the authors were able to sustain 105- to 115-day-old premature lamb fetuses-whose level of development was comparable to that of a twenty-three-week-old human fetus-for four weeks in an artificial womb, enabling the lambs to develop in a way that paralleled age-matched controls. The oldest lamb of the set, more than a year old at the time the paper came out, appeared completely normal. This kind of research brings us one step closer to providing excellent quality of life for premature newborns, but it also portends major legal and ethical questions, especially for abortion rights in America...
July 2017: Hastings Center Report
https://www.readbyqxmd.com/read/28748848/nine-hole-peg-test-and-ten-meter-walk-test-for-evaluating-functional-loss-in-chinese-charcot-marie-tooth-disease
#14
Hui-Xia Niu, Rui-Hao Wang, Hong-Liang Xu, Bo Song, Jing Yang, Chang-He Shi, Yu-Sheng Li, Bing-Qian Zhang, Shao-Ping Wang, Quan Yong, Yuan-Yuan Wang, Yu-Ming Xu
BACKGROUND: The 9-hole peg test (9-HPT) and 10-meter walk test (10-MWT) are commonly used to test finger motor function and walking ability. The aim of this present study was to investigate the efficacy of these tests for evaluating functional loss in Chinese Charcot-Marie-Tooth (CMT) disease. METHODS: Thirty-four Chinese CMT patients (CMT group) from August 2015 to December 2016 were evaluated with 9-HPT, 10-MWT, CMT disease examination score, overall neuropathy limitation scale (ONLS), functional disability score, and Berg Balance Scale (BBS)...
August 5, 2017: Chinese Medical Journal
https://www.readbyqxmd.com/read/28748720/blunting-of-cardioprotective-actions-of-estrogen-in-female-rodent-heart-linked-to-altered-expression-of-cardiac-tissue-chymase-and-ace2
#15
Jacqueline S da Silva, Daniele Gabriel-Costa, Hao Wang, Sarfaraz Ahmad, Xuming Sun, Jasmina Varagic, Roberto T Sudo, Carlos M Ferrario, Louis J Dell Italia, Gisele-Zapata Sudo, Leanne Groban
BACKGROUND: Diastolic dysfunction develops in response to hypertension and estrogen (E2) loss and is a forerunner to heart failure (HF) in women. The cardiac renin-angiotensin system (RAS) contributes to diastolic dysfunction, but its role with respect to E2 and blood pressure remain unclear. METHODS: We compared the effects of ovariectomy (OVX) or sham surgery on the cardiac RAS, left ventricular (LV) structure/function, and systemic/intracardiac pressures of spontaneously hypertensive rats (SHRs: n = 6 intact and 6 OVX) and age-matched Wistar-Kyoto (WKY: n = 5 intact and 4 OVX) controls...
July 2017: Journal of the Renin-angiotensin-aldosterone System: JRAAS
https://www.readbyqxmd.com/read/28748674/prognosis-of-patients-with-behavioral-variant-frontotemporal-dementia-who-have-focal-versus-diffuse-frontal-atrophy
#16
Jin San Lee, Na Yeon Jung, Young Kyoung Jang, Hee Jin Kim, Sang Won Seo, Juyoun Lee, Yeo Jin Kim, Jae Hong Lee, Byeong C Kim, Kyung Won Park, Soo Jin Yoon, Jee H Jeong, Sang Yun Kim, Seung Hyun Kim, Eun Joo Kim, Key Chung Park, David S Knopman, Duk L Na
BACKGROUND AND PURPOSE: Only a few studies have investigated the relationship between different subtypes and disease progression or prognosis in patients with behavioral variant frontotemporal dementia (bvFTD). Since a localized injury often produces more focal signs than a diffuse injury, we hypothesized that the clinical characteristics differ between patients with bvFTD who show diffuse frontal lobe atrophy (D-type) on axial magnetic resonance imaging (MRI) scans versus those with focal or circumscribed frontal lobe atrophy (F-type)...
July 2017: Journal of Clinical Neurology
https://www.readbyqxmd.com/read/28748652/bleeding-related-hospital-admissions-and-30-day-re-admissions-in-patients-with-nonvalvular-atrial-fibrillation-treated-with-dabigatran-versus-warfarin
#17
Wallis C Y Lau, Xue Li, Ian C K Wong, Kenneth K C Man, Gregory Y H Lip, Wai K Leung, Chung W Siu, Esther W Chan
BACKGROUND: Reducing 30-day hospital re-admission is a policy priority worldwide. Warfarin-related bleeding is among the most common cause of hospital admissions due to adverse drug events. Compared to warfarin, dabigatran achieve full anticoagulation effect more quickly following its initiation, hence may lead to early-onset bleeds. OBJECTIVES: To compare the incidence of bleeding-related hospital admissions and 30-day re-admissions with dabigatran versus warfarin in patients with nonvalvular atrial fibrillation (NVAF)...
July 27, 2017: Journal of Thrombosis and Haemostasis: JTH
https://www.readbyqxmd.com/read/28748642/noonan-syndrome-in-diverse-populations
#18
Paul Kruszka, Antonio R Porras, Yonit A Addissie, Angélica Moresco, Sofia Medrano, Gary T K Mok, Gordon K C Leung, Cedrik Tekendo-Ngongang, Annette Uwineza, Meow-Keong Thong, Premala Muthukumarasamy, Engela Honey, Ekanem N Ekure, Ogochukwu J Sokunbi, Nnenna Kalu, Kelly L Jones, Julie D Kaplan, Omar A Abdul-Rahman, Lisa M Vincent, Amber Love, Khadija Belhassan, Karim Ouldim, Ihssane El Bouchikhi, Anju Shukla, Katta M Girisha, Siddaramappa J Patil, Nirmala D Sirisena, Vajira H W Dissanayake, C Sampath Paththinige, Rupesh Mishra, Eva Klein-Zighelboim, Bertha E Gallardo Jugo, Miguel Chávez Pastor, Hugo H Abarca-Barriga, Steven A Skinner, Eloise J Prijoles, Eben Badoe, Ashleigh D Gill, Vorasuk Shotelersuk, Patroula Smpokou, Monisha S Kisling, Carlos R Ferreira, Leon Mutesa, Andre Megarbane, Antonie D Kline, Amy Kimball, Emmy Okello, Peter Lwabi, Twalib Aliku, Emmanuel Tenywa, Nonglak Boonchooduang, Pranoot Tanpaiboon, Antonio Richieri-Costa, Ambroise Wonkam, Brian H Y Chung, Roger E Stevenson, Marshall Summar, Kausik Mandal, Shubha R Phadke, María G Obregon, Marius G Linguraru, Maximilian Muenke
Noonan syndrome (NS) is a common genetic syndrome associated with gain of function variants in genes in the Ras/MAPK pathway. The phenotype of NS has been well characterized in populations of European descent with less attention given to other groups. In this study, individuals from diverse populations with NS were evaluated clinically and by facial analysis technology. Clinical data and images from 125 individuals with NS were obtained from 20 countries with an average age of 8 years and female composition of 46%...
July 27, 2017: American Journal of Medical Genetics. Part A
https://www.readbyqxmd.com/read/28748621/outcomes-of-matched-sibling-donor-bone-marrow-transplantation-in-children-using-single-agent-calcineurin-inhibitors-as-prophylaxis-for-graft-versus-host-disease
#19
Caitlin W Elgarten, Danielle E Arnold, Nancy J Bunin, Alix E Seif
BACKGROUND: Optimal graft versus host disease (GVHD) prophylaxis prevents severe manifestations without excess immunosuppression. Standard prophylaxis includes a calcineurin inhibitor (CNI) with low-dose methotrexate. However, single-agent CNI may be sufficient prophylaxis for a defined group of patients. Single-agent CNI has been used for GVHD prophylaxis for human leukocyte antigen (HLA)-matched sibling donor (MSD) bone marrow transplants (BMTs) in young patients at the Children's Hospital of Philadelphia for over 20 years...
July 27, 2017: Pediatric Blood & Cancer
https://www.readbyqxmd.com/read/28748572/let-s-chat-developmental-neural-bases-of-social-motivation-during-real-time-peer-interaction
#20
Katherine Rice Warnell, Eleonora Sadikova, Elizabeth Redcay
Humans are motivated to interact with each other, but the neural bases of social motivation have been predominantly examined in non-interactive contexts. Understanding real-world social motivation is of special importance during middle childhood (ages 8-12), a period when social skills improve, social networks grow, and social brain networks specialize. To assess interactive social motivation, the current study used a novel fMRI paradigm in which children believed they were chatting with a peer. The design targeted two phases of interaction: (1) Initiation, in which children engaged in a social bid via sharing a like or hobby, and (2) Reply, in which children received either an engaged ("Me too") or non-engaged ("I'm away") reply from the peer...
July 26, 2017: Developmental Science
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