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https://www.readbyqxmd.com/read/27918454/coordinate-based-clustering-method-for-indoor-fingerprinting-localization-in-dense-cluttered-environments
#1
Wen Liu, Xiao Fu, Zhongliang Deng
Indoor positioning technologies has boomed recently because of the growing commercial interest in indoor location-based service (ILBS). Due to the absence of satellite signal in Global Navigation Satellite System (GNSS), various technologies have been proposed for indoor applications. Among them, Wi-Fi fingerprinting has been attracting much interest from researchers because of its pervasive deployment, flexibility and robustness to dense cluttered indoor environments. One challenge, however, is the deployment of Access Points (AP), which would bring a significant influence on the system positioning accuracy...
December 2, 2016: Sensors
https://www.readbyqxmd.com/read/27918385/neurally-adjusted-ventilatory-assist-in-preterm-infants-with-established-or-evolving-bronchopulmonary-dysplasia-on-high-intensity-mechanical-ventilatory-support-a-single-center-experience
#2
Young Hwa Jung, Han-Suk Kim, Juyoung Lee, Seung Han Shin, Ee-Kyung Kim, Jung-Hwan Choi
OBJECTIVES: The aim of the present study was to report possible improvements in ventilator variables associated with a transition from synchronized intermittent mandatory ventilation to neurally adjusted ventilatory assist in preterm infants with bronchopulmonary dysplasia who required a high level of mechanical ventilatory support in a single center. DESIGN: Retrospective study. SETTING: Neonatal ICU. PATIENTS: Twenty-nine preterm infants with a median gestational age of 25...
December 2016: Pediatric Critical Care Medicine
https://www.readbyqxmd.com/read/27857689/the-safety-and-efficacy-of-dexmedetomidine-vs-sufentanil-in-monitored-anesthesia-care-during-burr-hole-surgery-for-chronic-subdural-hematoma-a-retrospective-clinical-trial
#3
Wenming Wang, Lei Feng, Fenfen Bai, Zongwang Zhang, Yong Zhao, Chunguang Ren
Background: Chronic subdural hematoma (CSDH) is a very common clinical emergency encountered in neurosurgery. While both general anesthesia (GA) and monitored anesthesia care (MAC) can be used during CSDH surgery, MAC is the preferred choice among surgeons. Further, while dexmedetomidine (DEX) is reportedly a safe and effective agent for many diagnostic and therapeutic procedures, there have been no trials to evaluate the safety and efficacy of DEX vs. sufentanil in CSDH surgery. Objective: To evaluate the safety and efficacy of DEX vs...
2016: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/27853947/prior-video-game-utilization-is-associated-with-improved-performance-on-a-robotic-skills-simulator
#4
Andrew C Harbin, Kumar S Nadhan, James H Mooney, Daohai Yu, Joshua Kaplan, Nora McGinley-Hence, Andrew Kim, Yiming Gu, Daniel D Eun
Laparoscopic surgery and robotic surgery, two forms of minimally invasive surgery (MIS), have recently experienced a large increase in utilization. Prior studies have shown that video game experience (VGE) may be associated with improved laparoscopic surgery skills; however, similar data supporting a link between VGE and proficiency on a robotic skills simulator (RSS) are lacking. The objective of our study is to determine whether volume or timing of VGE had any impact on RSS performance. Pre-clinical medical students completed a comprehensive questionnaire detailing previous VGE across several time periods...
November 16, 2016: Journal of Robotic Surgery
https://www.readbyqxmd.com/read/27845715/advanced-pedestrian-positioning-system-to-smartphones-and-smartwatches
#5
Alejandro Correa, Estefania Munoz Diaz, Dina Bousdar Ahmed, Antoni Morell, Jose Lopez Vicario
In recent years, there has been an increasing interest in the development of pedestrian navigation systems for satellite-denied scenarios. The popularization of smartphones and smartwatches is an interesting opportunity for reducing the infrastructure cost of the positioning systems. Nowadays, smartphones include inertial sensors that can be used in pedestrian dead-reckoning (PDR) algorithms for the estimation of the user's position. Both smartphones and smartwatches include WiFi capabilities allowing the computation of the received signal strength (RSS)...
November 11, 2016: Sensors
https://www.readbyqxmd.com/read/27845711/indoor-location-sensing-with-invariant-wi-fi-received-signal-strength-fingerprinting
#6
Mohd Nizam Husen, Sukhan Lee
A method of location fingerprinting based on the Wi-Fi received signal strength (RSS) in an indoor environment is presented. The method aims to overcome the RSS instability due to varying channel disturbances in time by introducing the concept of invariant RSS statistics. The invariant RSS statistics represent here the RSS distributions collected at individual calibration locations under minimal random spatiotemporal disturbances in time. The invariant RSS statistics thus collected serve as the reference pattern classes for fingerprinting...
November 11, 2016: Sensors
https://www.readbyqxmd.com/read/27834984/effect-of-preoperative-intravenous-oxycodone-administration-on-sufentanil-consumption-after-retroperitoneal-laparoscopic-nephrectomy
#7
Jinguo Wang, Haichun Ma, Honglan Zhou, Yang Gao, Yaowen Fu, Na Wang
BACKGROUND: The aim of this study was to evaluate the efficacy of preoperative intravenous oxycodone administration on postoperative sufentanil consumption in patients undergoing retroperitoneal laparoscopic nephrectomy. METHODS: Fifty patients scheduled for retroperitoneal laparoscopic nephrectomy were enrolled and randomly assigned to two groups - patients in Group O (n = 25) received intravenously 0.1 mg kg⁻¹ oxycodone; while the patients in Group C (n = 25) received 0...
November 11, 2016: Anaesthesiology Intensive Therapy
https://www.readbyqxmd.com/read/27833559/the-opioid-sparing-effect-of-perioperative-dexmedetomidine-plus-sufentanil-infusion-during-neurosurgery-a-retrospective-study
#8
Shiyu Su, Chunguang Ren, Hongquan Zhang, Zhong Liu, Zongwang Zhang
Background: Approximately 60% of patients experience moderate-to-severe pain after neurosurgery, which primarily occurs in the first 24-72 h. Despite this, improved postoperative analgesia solutions after neurosurgery have not yet been devised. This retrospective study was conducted to evaluate the effect of intra- and post-operative infusions of dexmedetomidine (DEX) plus sufentanil on the quality of postoperative analgesia in patients undergoing neurosurgery. Methods: One hundred and sixty-three post-neurosurgery patients were divided into two groups: Group D (DEX infusion at 0...
2016: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/27828821/a-risk-prediction-model-based-on-lymph-node-metastasis-for-incorporation-into-a-treatment-algorithm-for-signet-ring-cell-type-intramucosal-gastric-cancer
#9
Jeung Hui Pyo, Cheol Min Shin, Hyuk Lee, Byung-Hoon Min, Jun Haeng Lee, Su Mi Kim, Min Gew Choi, Jun Ho Lee, Tae Sung Sohn, Jae Moon Bae, Kyung Mee Kim, Hye Seung Kim, Sin-Ho Jung, Jae J Kim, Sung Kim
OBJECTIVE: The aim of the study was to develop a reliable and easy-to-use risk-scoring system (RSS) to predict lymph-node metastasis (LNM) and determine the feasibility of endoscopic submucosal dissection for mucosa-confined signet ring cell carcinomas (SRCs). BACKGROUND: Fewer LNM and better survival rates have been reported for early gastric SRCs compared with other undifferentiated early gastric cancers (EGCs). METHODS: Data from 1544 patients with mucosa-confined SRCs were reviewed...
December 2016: Annals of Surgery
https://www.readbyqxmd.com/read/27827882/rss-fingerprint-based-indoor-localization-using-sparse-representation-with-spatio-temporal-constraint
#10
Xinglin Piao, Yong Zhang, Tingshu Li, Yongli Hu, Hao Liu, Ke Zhang, Yun Ge
The Received Signal Strength (RSS) fingerprint-based indoor localization is an important research topic in wireless network communications. Most current RSS fingerprint-based indoor localization methods do not explore and utilize the spatial or temporal correlation existing in fingerprint data and measurement data, which is helpful for improving localization accuracy. In this paper, we propose an RSS fingerprint-based indoor localization method by integrating the spatio-temporal constraints into the sparse representation model...
November 3, 2016: Sensors
https://www.readbyqxmd.com/read/27825771/riches-in-rags-revealing-the-v-d-j-recombinase-through-high-resolution-structures
#11
REVIEW
Karla K Rodgers
Development of the adaptive immune system is dependent on V(D)J recombination, which forms functional antigen receptor genes through rearrangement of component gene segments. The V(D)J recombinase, comprising recombination-activating proteins RAG1 and RAG2, guides the initial DNA cleavage events to the recombination signal sequence (RSS), which flanks each gene segment. Although the enzymatic steps for RAG-mediated endonucleolytic activity were established over two decades ago, only recently have high-resolution structural studies of the catalytically active core regions of the RAG proteins shed light on conformational requirements for the reaction...
November 5, 2016: Trends in Biochemical Sciences
https://www.readbyqxmd.com/read/27817792/modelling-disease-progression-in-relapsing-remitting-onset-multiple-sclerosis-using-multilevel-models-applied-to-longitudinal-data-from-two-natural-history-cohorts-and-one-treated-cohort
#12
Kate Tilling, Michael Lawton, Neil Robertson, Helen Tremlett, Feng Zhu, Katharine Harding, Joel Oger, Yoav Ben-Shlomo
BACKGROUND: The ability to better predict disease progression represents a major unmet need in multiple sclerosis (MS), and would help to inform therapeutic and management choices. OBJECTIVES: To develop multilevel models using longitudinal data on disease progression in patients with relapsing-remitting MS (RRMS) or secondary-progressive MS (SPMS); and to use these models to estimate the association of disease-modifying therapy (DMT) with progression. DESIGN: Secondary analysis of three MS cohorts...
October 2016: Health Technology Assessment: HTA
https://www.readbyqxmd.com/read/27806570/staphylococcus-aureus-sqr-encodes-a-type-ii-sulfide-quinone-oxidoreductase-and-impacts-reactive-sulfur-speciation-in-cells
#13
Jiangchuan Shen, Hui Peng, Yixiang Zhang, Jonathan C Trinidad, David Peter Giedroc
Recent studies implicate hydrogen sulfide (H2S) oxidation as an important aspect of bacterial antibiotic resistance and sulfide homeostasis. The cst operon of the major human pathogen Staphylococcus aureus is induced by exogenous H2S stress and encodes enzymes involved in sulfide oxidation, including a Group I flavoprotein disulfide oxidoreductase sulfide:quinone oxidoreductase (SQR). In this work, we show that S. aureus SQR catalyzes the two-electron oxidation of sodium sulfide (Na2S) into sulfane sulfur (S0) when provided FAD and a water soluble quinone acceptor...
November 2, 2016: Biochemistry
https://www.readbyqxmd.com/read/27798384/selective-weighted-least-squares-method-for-fourier-transform-infrared-quantitative-analysis
#14
Xin Wang, Yan Li, Haoyun Wei, Xia Chen
Classical least squares (CLS) regression is a popular multivariate statistical method used frequently for quantitative analysis using Fourier transform infrared (FT-IR) spectrometry. Classical least squares provides the best unbiased estimator for uncorrelated residual errors with zero mean and equal variance. However, the noise in FT-IR spectra, which accounts for a large portion of the residual errors, is heteroscedastic. Thus, if this noise with zero mean dominates in the residual errors, the weighted least squares (WLS) regression method described in this paper is a better estimator than CLS...
October 26, 2016: Applied Spectroscopy
https://www.readbyqxmd.com/read/27775837/chemotherapy-decisions-and-patient-experience-with-the-recurrence-score-assay-for-early-stage-breast-cancer
#15
Christopher R Friese, Yun Li, Irina Bondarenko, Timothy P Hofer, Kevin C Ward, Ann S Hamilton, Dennis Deapen, Allison W Kurian, Steven J Katz
BACKGROUND: The 21-gene recurrence score (RS) assay stratifies early-stage, estrogen receptor-positive breast cancer by recurrence risk. Few studies have examined the ways in which physicians use the RS to recommend adjuvant systemic chemotherapy or patients' experiences with testing and decision making. METHODS: This study surveyed 3880 women treated for breast cancer in 2013-2014; they were identified from the Los Angeles County and Georgia Surveillance, Epidemiology, and End Results registries (response rate, 71%)...
October 24, 2016: Cancer
https://www.readbyqxmd.com/read/27750028/practical-performance-of-the-2015-american-thyroid-association-guidelines-for-predicting-tumor-recurrence-in-patients-with-papillary-thyroid-cancer-in-south-korea
#16
Seul Gi Lee, Woo Kyung Lee, Hye Sun Lee, Jieun Moon, Cho Rok Lee, Sang Wook Kang, Jong Ju Jeong, Kee-Hyun Nam, Woong Youn Chung, Young Suk Jo, Jandee Lee
BACKGROUND: The 2015 American Thyroid Association (ATA) management guidelines for adult patients with differentiated thyroid cancer propose the use of the modified initial risk stratification and response to therapy re-stratification systems. This study was conducted to validate the practicality of the revised guidelines for predicting tumor recurrence in patients with differentiated thyroid cancer. METHODS: Patients with papillary thyroid cancer (n = 2425) who underwent total thyroidectomy with central neck node dissection with or without modified radical neck node dissection at a single institution between October 1985 and July 2009 were retrospectively enrolled...
November 16, 2016: Thyroid: Official Journal of the American Thyroid Association
https://www.readbyqxmd.com/read/27742432/correlation-study-between-intravoxel-incoherent-motion-mri-and-dynamic-contrast-enhanced-mri-in-head-and-neck-squamous-cell-carcinoma-evaluation-in-primary-tumors-and-metastatic-nodes
#17
Simona Marzi, Francesca Piludu, Chiara Forina, Giuseppe Sanguineti, Renato Covello, Giuseppe Spriano, Antonello Vidiri
OBJECTIVE: To correlate intravoxel incoherent motion (IVIM) imaging and dynamic contrast-enhanced (DCE) MRI in head and neck squamous cell carcinoma (HNSCC). METHODS: Forty untreated patients with HNSCC were included retrospectively in the study. Perfusion fraction f, diffusion coefficient D and perfusion-related diffusion coefficient D* were extracted by bi-exponential fitting of IVIM data. Semi-quantitative DCE-MRI parameters, including positive enhancement integral (PEI) and maximum slope of increase (MSI), were calculated...
October 11, 2016: Magnetic Resonance Imaging
https://www.readbyqxmd.com/read/27735879/pila-sub-meter-localization-using-csi-from-commodity-wi-fi-devices
#18
Zengshan Tian, Ze Li, Mu Zhou, Yue Jin, Zipeng Wu
The aim of this paper is to present a new indoor localization approach by employing the Angle-of-arrival (AOA) and Received Signal Strength (RSS) measurements in Wi-Fi network. To achieve this goal, we first collect the Channel State Information (CSI) by using the commodity Wi-Fi devices with our designed three antennas to estimate the AOA of Wi-Fi signal. Second, we propose a direct path identification algorithm to obtain the direct signal path for the sake of reducing the interference of multipath effect on the AOA estimation...
October 10, 2016: Sensors
https://www.readbyqxmd.com/read/27734549/comparison-of-oral-midazolam-with-intranasal-dexmedetomidine-premedication-for-children-undergoing-ct-imaging-a-randomized-double-blind-and-controlled-study
#19
Babita Ghai, Kajal Jain, Akshay Kumar Saxena, Nidhi Bhatia, Kushaljit Singh Sodhi
BACKGROUND: Children undergoing computerized tomography (CT) frequently require sedation to allay their anxiety, and prevent motion artifacts and stress of intravenous (IV) cannulation. AIMS: The aim of this trial was to compare the effectiveness of oral midazolam and intranasal dexmedetomidine as sole premedicants in children for carrying out both IV cannulation as well as CT scanning, without the need for additional IV sedatives. METHODS: Fifty-nine children, aged 1-6 years, scheduled to undergo CT imaging under sedation were randomized to receive either 0...
October 13, 2016: Paediatric Anaesthesia
https://www.readbyqxmd.com/read/27722427/positioning-colloids-at-the-surfaces-of-cholesteric-liquid-crystal-droplets
#20
Emre Bukusoglu, Xiaoguang Wang, Ye Zhou, José A Martínez-González, Mohammad Rahimi, Qi Wang, Juan J de Pablo, Nicholas L Abbott
We report on the internal configurations of aqueous dispersions of droplets of cholesteric liquid crystals (LCs; 5-50 μm-in-diameter; comprised of 4-cyano-4'-pentylbiphenyl and 4-(1-methylheptyloxycarbonyl)phenyl-4-hexyloxybenzoate) and their influence on the positioning of surface-adsorbed colloids (0.2 or 1 μm-in-diameter polystyrene (PS)). When N = 2D/P was less than 4, where D is the droplet diameter and P is the cholesteric pitch, the droplets adopted a twisted bipolar structure (TBS) and colloids were observed to assume positions at either the poles or equator of the droplets...
October 5, 2016: Soft Matter
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