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https://www.readbyqxmd.com/read/28816681/augmented-lagrange-programming-neural-network-for-localization-using-time-difference-of-arrival-measurements
#1
Zifa Han, Chi Sing Leung, Hing Cheung So, Anthony George Constantinides
A commonly used measurement model for locating a mobile source is time-difference-of-arrival (TDOA). As each TDOA measurement defines a hyperbola, it is not straightforward to compute the mobile source position due to the nonlinear relationship in the measurements. This brief exploits the Lagrange programming neural network (LPNN), which provides a general framework to solve nonlinear constrained optimization problems, for the TDOA-based localization. The local stability of the proposed LPNN solution is also analyzed...
August 15, 2017: IEEE Transactions on Neural Networks and Learning Systems
https://www.readbyqxmd.com/read/28816680/admm-based-algorithm-for-training-fault-tolerant-rbf-networks-and-selecting-centers
#2
Hao Wang, Ruibin Feng, Zi-Fa Han, Chi-Sing Leung
In the training stage of radial basis function (RBF) networks, we need to select some suitable RBF centers first. However, many existing center selection algorithms were designed for the fault-free situation. This brief develops a fault tolerant algorithm that trains an RBF network and selects the RBF centers simultaneously. We first select all the input vectors from the training set as the RBF centers. Afterward, we define the corresponding fault tolerant objective function. We then add an ℓ₁-norm term into the objective function...
August 15, 2017: IEEE Transactions on Neural Networks and Learning Systems
https://www.readbyqxmd.com/read/28816424/cover-image-volume-173a-number-9-september-2017
#3
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
The cover image, by Paul Kruszka et al., is based on the Original Article Noonan Syndrome in Diverse Populations, DOI: 10.1002/ajmg.a.38362. Design Credit: Darryl Leja.
September 2017: American Journal of Medical Genetics. Part A
https://www.readbyqxmd.com/read/28813918/how-to-prepare-a-person-with-complete-spinal-cord-injury-to-use-surface-electrodes-for-fes-trike-cycling
#4
Raymond K Y Tong, Xiaojun Wang, Kenry W C Leung, Ginny T Y Lee, Cathy C Y Lau, H W Wai, Peter M K Pang, H C Leung
Functional Electrical Stimulation (FES) cycling could benefit people with Spinal Cord Injury (SCI). The FES cycling involves large muscle groups during the training, and thus improves the cardiovascular function, increases the muscle bulk and reduces the secondary complications. This study developed an outdoor FES exercise cycling system for complete SCI persons to exercise their lower limbs without putting extra load on upper extremities. The mechanical structure of the cycling system was specially redesigned to secure the SCI persons in the cycling system...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28813666/microrna-9-couples-brain-neurogenesis-and-angiogenesis
#5
Romain Madelaine, Steven A Sloan, Nina Huber, James H Notwell, Louis C Leung, Gemini Skariah, Caroline Halluin, Sergiu P Paşca, Gill Bejerano, Mark A Krasnow, Ben A Barres, Philippe Mourrain
In the developing brain, neurons expressing VEGF-A and blood vessels grow in close apposition, but many of the molecular pathways regulating neuronal VEGF-A and neurovascular system development remain to be deciphered. Here, we show that miR-9 links neurogenesis and angiogenesis through the formation of neurons expressing VEGF-A. We found that miR-9 directly targets the transcription factors TLX and ONECUTs to regulate VEGF-A expression. miR-9 inhibition leads to increased TLX and ONECUT expression, resulting in VEGF-A overexpression...
August 15, 2017: Cell Reports
https://www.readbyqxmd.com/read/28813030/an-overview-of-factors-associated-with-adherence-to-lifestyle-modification-programs-for-weight-management-in-adults
#6
REVIEW
Alice W Y Leung, Ruth S M Chan, Mandy M M Sea, Jean Woo
This review aims to provide an overview of the factors associated with adherence reported in existing literature on lifestyle modification programs for weight management among the adult population. An electronic search was performed using PubMed, Medline, PsycINFO and PsycARTICLE to identify studies that examined the factors of adherence to lifestyle modification programs with explicit definition of adherence indicators. We identified 19 studies published between 2004 and 2016. The most commonly used indicator of adherence was attrition, followed by attendance, self-monitoring and dietary adherence...
August 16, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28811631/development-of-a-primary-human-co-culture-model-of-inflamed-airway-mucosa
#7
Lael M Yonker, Hongmei Mou, Kengyeh K Chu, Michael A Pazos, Huimin Leung, Dongyao Cui, Jinhyeob Ryu, Rhianna M Hibbler, Alexander D Eaton, Tim N Ford, J R Falck, T Bernard Kinane, Guillermo J Tearney, Jayaraj Rajagopal, Bryan P Hurley
Neutrophil breach of the mucosal surface is a common pathological consequence of infection. We present an advanced co-culture model to explore neutrophil transepithelial migration utilizing airway mucosal barriers differentiated from primary human airway basal cells and examined by advanced imaging. Human airway basal cells were differentiated and cultured at air-liquid interface (ALI) on the underside of 3 µm pore-sized transwells, compatible with the study of transmigrating neutrophils. Inverted ALIs exhibit beating cilia and mucus production, consistent with conventional ALIs, as visualized by micro-optical coherence tomography (µOCT)...
August 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28809196/health-informatics-and-technology-for-integrated-elderly-care-in-the-context-of-hong-kong-a-case-study
#8
Cheuk Wing Chau, Eman Leung
The aging population creates tremendous pressure to healthcare. To resolve, scholars recognized the solution to this challenge is integrated care. To facilitate integrated care, health information technologies (HIT) is a critical enabler. This paper will first review how technology enhanced integrated care, and review on the existing literatures in system effective use and the three key external factors that enable HIT implementation. Applying Burton-Jones and Volkoff's contextualized theories of effective use of HIT to understand the role of health informatics and technology in the unique context of Hong Kong, we have conducted a case study research to identify the levers for improving HK integration of care through HIT...
2017: Studies in Health Technology and Informatics
https://www.readbyqxmd.com/read/28809173/context-sensitive-health-informatics-delivering-21st-century-healthcare-building-a-quality-and-efficiency-driven-system
#9
Zoie Shui-Yee Wong, Christian Nøhr, Craig E Kuziemsky, Eman Leung, Frank Chen
Health informatics applications will be a cornerstone in the next generation quality-and-efficiency health care system. Health care is delivered from many different specialties, to many different patients with complex diseases and comorbidity. A one size fits all approach is not adequate to reach the Triple Aim of improving the patient experience of care, improving the health of populations, and reducing the per capita cost of health care. Health informatics applications must be built to be adaptable and sensitive to the complex contexts they will be used in...
2017: Studies in Health Technology and Informatics
https://www.readbyqxmd.com/read/28808509/an-educational-intervention-to-increase-awareness-reduces-unnecessary-laboratory-testing-in-an-internal-medicine-resident-run-clinic
#10
Erika Leung, Shuang Song, Omar Al-Abboud, Shahed Shams, John English, Wisam Naji, Yafei Huang, Leon Robison, Fred Balis, Hameem I Kawsar
At our resident-run clinic in an underserved community, laboratory test costs in 2013 exceeded the government subsidy by $400 000. To optimize limited resources and improve patient care, an education program to reduce testing was implemented. Between November 2014 and January 2015, residents attended lectures on utilization of laboratory testing, focusing on standard practice guidelines, and analyses of unnecessary tests. Multivariate nonparametric statistical methods and subgroup analysis were used to evaluate cost reduction...
July 2017: Journal of Community Hospital Internal Medicine Perspectives
https://www.readbyqxmd.com/read/28807981/delineation-of-the-timing-of-second-line-therapy-post-autologous-stem-cell-transplant-in-patients-with-al-amyloidosis
#11
Yi L Hwa, Rahma Warsame, Morie A Gertz, Francis K Buadi, Martha Q Lacy, Shaji K Kumar, David Dingli, Steve R Zeldenrust, Nelson Leung, Suzanne R Hayman, Prashant Kapoor, Wilson I Gonsalves, Taxiarchis V Kourelis, Stephen Russell, Ronald S Go, Miriam A Hobbs, Amie L Fonder, S Vincent Rajkumar, Angela Dispenzieri
Among patients with immunoglobulin light chain (AL) amyloidosis, there is little consensus on when reinstitution of chemotherapy should occur. We conducted a retrospective study to evaluate the patterns of relapse or progression (R/P) and the timing of re-initiating therapy among 235 patients initially treated with ASCT at Mayo Clinic. The median time from ASCT to second-line therapy was 24.3 months. At the time of restarting therapy, median dFLC was 9.9 mg/dL (42% of diagnosis value); 32% had a dFLC< 5mg/dL; and 63% met criteria for organ R/P...
August 14, 2017: Blood
https://www.readbyqxmd.com/read/28807955/bilateral-pathologic-mid-tibial-stress-fractures-initial-presentation-of-mild-primary-hyperparathyroidism
#12
Fahim Merali, Mark Leung
No abstract text is available yet for this article.
August 2017: Canadian Family Physician Médecin de Famille Canadien
https://www.readbyqxmd.com/read/28807929/human-mucosal-associated-invariant-t-mait-cells-possess-capacity-for-b-cell-help
#13
Michael S Bennett, Shubhanshi Trivedi, Anita S Iyer, J Scott Hale, Daniel T Leung
Mucosal-associated invariant T (MAIT) cells are an innate-like T-cell subset, restricted by the nonclassic MHC class I-related protein MR1 and enriched at mucosal sites. Human studies have shown an association between MAIT cells and pathogen-specific antibody responses. In this study, we investigate the effect of human MAIT cells on B cells ex vivo. We found that supernatants from microbe- or cytokine-stimulated MAIT cells, when added to purified autologous B cells, increase frequencies of plasmablasts and promote IgA, IgG, and IgM production...
August 14, 2017: Journal of Leukocyte Biology
https://www.readbyqxmd.com/read/28807254/minimally-invasive-gastrectomy-for-gastric-cancer-a-national-perspective-on-oncologic-outcomes-and-overall-survival
#14
Kenneth Leung, Zhifei Sun, Daniel P Nussbaum, Mohamed A Adam, Mathias Worni, Dan G Blazer
BACKGROUND: Minimally invasive (MI) gastrectomy has become increasingly common as a resection technique for gastric cancer; however, data are limited regarding peri-operative morbidity, oncologic outcomes and long-term survival, particularly in the Western patient population. STUDY DESIGN: The 2010-2012 National Cancer Data Base was queried for adult patients who underwent gastrectomy for localized, intestinal-type gastric adenocarcinoma. Patients were classified by surgical approach (MI vs...
September 2017: Surgical Oncology
https://www.readbyqxmd.com/read/28807063/performance-of-a-novel-non-fit-tested-hepa-filtering-face-mask
#15
Constance Yung Ting Hui, Czarina Chi Hung Leung, Charles David Gomersall
No abstract text is available yet for this article.
August 15, 2017: Infection Control and Hospital Epidemiology
https://www.readbyqxmd.com/read/28806935/association-between-charlson-comorbidity-index-score-and-outcome-in-patients-with-stage-iiib-iv-non-small-cell-lung-cancer
#16
Lei Zhao, Lai-Han Leung, Jing Wang, Huihui Li, Juanjuan Che, Lian Liu, Xiaojun Yao, Bangwei Cao
BACKGROUND: This retrospective study investigated the association between the Charlson comorbidity index (CCI) score and the survival of patients with stage IIIB-IV (advanced, non-resectable) non-small cell lung cancer (NSCLC) who also did not have gene mutations in epidermal growth factor receptor (EGFR) or anaplastic lymphoma kinase (ALK). METHODS: The records of 165 patients (28-80 y, median 61 y) who met the above criteria and were admitted to Beijing Friendship Hospital Capital Medical University from 1 May 2010 to 1 October 2014were reviewed...
August 15, 2017: BMC Pulmonary Medicine
https://www.readbyqxmd.com/read/28806806/pharmacologic-treatment-of-hypertension-in-adults-aged-60-years-or-older
#17
Doreen M Rabi, Stella S Daskalopoulou, Alexander A Leung, George Dresser, Raj Padwal, Nadia Khan
No abstract text is available yet for this article.
August 15, 2017: Annals of Internal Medicine
https://www.readbyqxmd.com/read/28806302/surgery-for-primary-hyperparathyroidism-adherence-to-consensus-guidelines-in-an-academic-health-system
#18
Eric J Kuo, Mostafa A Al-Alusi, Lin Du, Albert Shieh, Masha J Livhits, Angela M Leung, Michael W Yeh
OBJECTIVE: To determine the extent to which consensus guidelines for surgery in patients with primary hyperparathyroidism (PHPT) are followed within an academic health system. BACKGROUND: Previous studies have shown that adherence to consensus guidelines in community practice is low. METHODS: Adults with biochemically confirmed PHPT who received primary care within an academic health system were identified from 2005 to 2015. Multivariable logistic regression was used to analyze predictors of parathyroidectomy (PTx)...
August 11, 2017: Annals of Surgery
https://www.readbyqxmd.com/read/28806280/integrated-analysis-of-biopsies-from-inflammatory-bowel-disease-patients-identifies-saa1-as-a-link-between-mucosal-microbes-with-th17-and-th22-cells
#19
Mei San Tang, Rowann Bowcutt, Jacqueline M Leung, Martin J Wolff, Uma M Gundra, David Hudesman, Lisa B Malter, Michael A Poles, Lea Ann Chen, Zhiheng Pei, Antonio G Neto, Wasif M Abidi, Thomas Ullman, Lloyd Mayer, Richard A Bonneau, Ilseung Cho, Pʼng Loke
BACKGROUND: Inflammatory bowel diseases (IBD) are believed to be driven by dysregulated interactions between the host and the gut microbiota. Our goal is to characterize and infer relationships between mucosal T cells, the host tissue environment, and microbial communities in patients with IBD who will serve as basis for mechanistic studies on human IBD. METHODS: We characterized mucosal CD4 T cells using flow cytometry, along with matching mucosal global gene expression and microbial communities data from 35 pinch biopsy samples from patients with IBD...
August 9, 2017: Inflammatory Bowel Diseases
https://www.readbyqxmd.com/read/28805850/dispersible-oxygen-microsensors-map-oxygen-gradients-in-three-dimensional-cell-cultures
#20
Sasha Cai Lesher-Pérez, Ge-Ah Kim, Chuan-Hsien Kuo, Brendan M Leung, Sanda Mong, Taisuke Kojima, Christopher Moraes, M D Thouless, Gary D Luker, Shuichi Takayama
Phase fluorimetry, unlike the more commonly used intensity-based measurement, is not affected by differences in light paths from culture vessels or by optical attenuation through dense 3D cell cultures and hydrogels thereby minimizing dependence on signal intensity for accurate measurements. This work describes the use of phase fluorimetry on oxygen-sensor microbeads to perform oxygen measurements in different microtissue culture environments. In one example, cell spheroids were observed to deplete oxygen from the cell-culture medium filling the bottom of conventional microwells within minutes, whereas oxygen concentrations remained close to ambient levels for several days in hanging-drop cultures...
August 14, 2017: Biomaterials Science
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