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https://www.readbyqxmd.com/read/27922083/an-ultra-low-crosstalk-and-broadband-two-mode-de-multiplexer-based-on-adiabatic-couplers
#1
Chunlei Sun, Yu Yu, Mengyuan Ye, Guanyu Chen, Xinliang Zhang
A novel adiabatic couplers (ACs) based broadband and fabrication-tolerant two-mode multiplexer (MUX) is designed using silicon-on-insulator (SOI) platform. Being different from the previously reported ACs-based scheme, the converted and multiplexed signals are on conventional modes, rather than supermodes. The experimental results are in good agreement with the simulations. Over a wavelength range of 75 nm measured, the crosstalk is lower than -20 dB, and the insertion loss is ~1 dB. The eye diagram and bit error rate measurements validate the good performance of the proposed mode MUX...
December 6, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27921120/the-potential-of-probabilistic-graphical-models-in-linkage-map-construction
#2
Huange Wang, Fred A van Eeuwijk, Johannes Jansen
Probabilistic graphical models show great potential for robust and reliable construction of linkage maps. We show how to use probabilistic graphical models to construct high-quality linkage maps in the face of data perturbations caused by genotyping errors and reciprocal translocations. It has been shown that linkage map construction can be hampered by the presence of genotyping errors and chromosomal rearrangements such as inversions and translocations. Here, we report a novel method for linkage map construction using probabilistic graphical models...
December 5, 2016: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/27921071/validation-of-automatic-joint-space-width-measurements-in-hand-radiographs-in-rheumatoid-arthritis
#3
Olga Schenk, Yinghe Huo, Koen L Vincken, Mart A van de Laar, Ina H H Kuper, Kees C H Slump, Floris P J G Lafeber, Hein J Bernelot Moens
Computerized methods promise quick, objective, and sensitive tools to quantify progression of radiological damage in rheumatoid arthritis (RA). Measurement of joint space width (JSW) in finger and wrist joints with these systems performed comparable to the Sharp-van der Heijde score (SHS). A next step toward clinical use, validation of precision and accuracy in hand joints with minimal damage, is described with a close scrutiny of sources of error. A recently developed system to measure metacarpophalangeal (MCP) and proximal interphalangeal (PIP) joints was validated in consecutive hand images of RA patients...
October 2016: Journal of Medical Imaging
https://www.readbyqxmd.com/read/27920505/illness-perceptions-and-stress-mediators-between-disease-severity-and-psychological-well-being-and-quality-of-life-among-patients-with-crohn-s-disease
#4
Maochen Zhang, Liwen Hong, Tianyu Zhang, Yun Lin, Sichang Zheng, Xiaolin Zhou, Rong Fan, Zhengting Wang, Chenli Zhang, Jie Zhong
BACKGROUND: Disease severity, illness perceptions, coping strategies, stress, psychological well-being, and quality of life were reported to have close relationships. According to the Common Sense Model, illness perceptions and coping strategies could mediate the relationship between illness stimuli and illness outcomes such as psychological health and quality of life. Stress was also associated with the individual's disease severity, anxiety, depression, and quality of life. OBJECTIVES: The study aimed to explore the influencing factors of illness outcomes, and to what extent illness perceptions, coping strategies, and stress mediate the relationship between disease severity and anxiety, and depression and quality of life...
2016: Patient Preference and Adherence
https://www.readbyqxmd.com/read/27920281/systematic-review-and-statistical-analysis-of-the-integrity-of-33-randomized-controlled-trials
#5
Mark J Bolland, Alison Avenell, Greg D Gamble, Andrew Grey
BACKGROUND: Statistical techniques can investigate data integrity in randomized controlled trials (RCTs). We systematically reviewed and analyzed all human RCTs undertaken by a group of researchers, about which concerns have been raised. METHODS: We compared observed distributions of p values for between-groups differences in baseline variables, for standardized sample means for continuous baseline variables, and for differences in treatment group participant numbers with the expected distributions...
December 6, 2016: Neurology
https://www.readbyqxmd.com/read/27919178/comparison-of-respiratory-inductive-plethysmography-versus-head-out-plethysmography-for-anesthetized-nonhuman-primates-in-an-animal-biosafety-level-4-facility
#6
J Kyle Bohannon, Anna N Honko, Rebecca J Reeder, Kurt Cooper, Russ Byrum, Laura Bollinger, Jens H Kuhn, Jiro Wada, Jing Qin, Peter B Jahrling, Matthew G Lackemeyer
For inhalational studies and aerosol exposures to viruses, head-out plethysmography acquisition has been traditionally used for the determination of estimated inhaled dose in anesthetized nonhuman primates prior to or during an aerosol exposure. A pressure drop across a pneumotachograph is measured within a sealed chamber during inspiration/exhalation of the nonhuman primate, generating respiratory values and breathing frequencies. Due to the fluctuation of depth of anesthesia, pre-exposure respiratory values can be variable, leading to less precise and accurate dosing calculations downstream...
December 5, 2016: Inhalation Toxicology
https://www.readbyqxmd.com/read/27919170/validation-of-the-fitbit-one-garmin-vivofit-and-jawbone-up-activity-tracker-in-estimation-of-energy-expenditure-during-treadmill-walking-and-running
#7
Kym Price, Stephen R Bird, Noel Lythgo, Isaac S Raj, Jason Y L Wong, Chris Lynch
OBJECTIVES: To determine the validity of energy expenditure estimation made by the Fitbit One, Garmin Vivofit and Jawbone UP activity trackers during treadmill walking and running. Determining validity of such trackers will inform the interpretation of the data they generate. DESIGN: Cross-sectional study. METHOD: Fourteen adults walked at 0.70, 1.25, 1.80 ms(-1) and ran at 2.22, 2.78, 3.33 ms(-1) on a treadmill wearing a Fitbit One, Garmin Vivofit and Jawbone UP...
December 5, 2016: Journal of Medical Engineering & Technology
https://www.readbyqxmd.com/read/27918887/resilience-to-emotional-distress-in-response-to-failure-error-or-mistakes-a-systematic-review
#8
REVIEW
Judith Johnson, Maria Panagioti, Jennifer Bass, Lauren Ramsey, Reema Harrison
Perceptions of failure have been implicated in a range of psychological disorders, and even a single experience of failure can heighten anxiety and depression. However, not all individuals experience significant emotional distress following failure, indicating the presence of resilience. The current systematic review synthesised studies investigating resilience factors to emotional distress resulting from the experience of failure. For the definition of resilience we used the Bi-Dimensional Framework for resilience research (BDF) which suggests that resilience factors are those which buffer the impact of risk factors, and outlines criteria a variable should meet in order to be considered as conferring resilience...
November 21, 2016: Clinical Psychology Review
https://www.readbyqxmd.com/read/27918696/validation-of-inertial-measurement-units-for-upper-body-kinematics
#9
Melissa M B Morrow, Bethany Lowndes, Emma Fortune, Kenton R Kaufman, Susan Hallbeck
The purpose of this study was to validate a commercially available IMU system against a standard lab-based motion capture system for the measurement of shoulder elevation, elbow flexion, trunk flexion/extension and neck flexion/extension kinematics. The validation analyses were applied to six surgical faculty members performing a standard, simulated surgical training task that mimics minimally invasive surgery. Three-dimensional joint kinematics were simultaneously recorded by an optical motion capture system and an IMU system with six sensors placed on the head, chest, and bilateral upper and lower arms...
December 5, 2016: Journal of Applied Biomechanics
https://www.readbyqxmd.com/read/27918623/the-effect-of-prescriber-education-on-medication-related-patient-harm-in-the-hospital-a-systematic-review
#10
J M Bos, P M L A van den Bemt, P A G M De Smet, C Kramers
INTRODUCTION: Educating prescribers is a strategy to reduce prescription errors in hospitals. This systematic review gives an overview of original research papers on education of prescribers, reporting outcomes on (potential) patient harm. METHODS: A search of the databases Embase and Medline using the Ovid interface was performed. Research on the effect of education of physicians in order to prevent medication related problems of inpatients, reporting original data and outcomes on prescribing errors and/or (potential) patient harm, was included...
December 5, 2016: British Journal of Clinical Pharmacology
https://www.readbyqxmd.com/read/27917768/iatrogenic-medication-errors-in-a-paediatric-intensive-care-unit-in-durban-south-africa
#11
A Gokhul, P M Jeena, A Gray
BACKGROUND: Iatrogenic medication errors due to calculation errors are an under-reported concern in children. OBJECTIVE: To determine the incidence and source of iatrogenic medication errors in a paediatric intensive care unit (PICU). METHODS: A prospective study was conducted in the PICU at Inkosi Albert Luthuli Hospital, Durban, South Africa, over a 3-month period in 2014. Medication-related calculation skills of medical practitioners and nurses were assessed through the voluntary anonymous completion of a questionnaire...
December 1, 2016: South African Medical Journal, Suid-Afrikaanse Tydskrif Vir Geneeskunde
https://www.readbyqxmd.com/read/27917760/the-universities-of-stellenbosch-cape-town-low-carbohydrate-diet-review-mistake-or-mischief
#12
Z Harcombe, T D Noakes
A 2014 meta-analysis from the universities of Stellenbosch and Cape Town reported that diets with a lower-carbohydrate (CHO) content are no more effective for producing weight loss than are high-CHO diets, so-called isoenergetic 'balanced' diets. We have re-examined the article and found numerous errors, many material in nature. Studies were included that failed the authors' own inclusion criteria; invalid and subjective meta-analysis sub-grouping was used; and data extraction was repeatedly inaccurate. All but one error favoured the balanced diet...
December 1, 2016: South African Medical Journal, Suid-Afrikaanse Tydskrif Vir Geneeskunde
https://www.readbyqxmd.com/read/27916371/errors-in-bladder-catheterization-are-residents-ready-for-complex-scenarios
#13
Bridget R O'Connell-Long, Rebecca D Ray, Jay N Nathwani, Rebekah M Fiers, Carla M Pugh
BACKGROUND: The aim of this study was to investigate whether junior surgical residents had successfully mastered bladder catheterization. Our hypothesis was that surgical residents would be overly confident in their abilities and underestimate the potential for case complexity. MATERIALS AND METHODS: PGY 2-4 surgery residents (n = 44) were given 15 min. to complete three of four bladder catheterization simulations. Participants reported their mastery by rating confidence using a 5-point Likert scale...
November 2016: Journal of Surgical Research
https://www.readbyqxmd.com/read/27915396/accurate-stone-analysis-the-impact-on-disease-diagnosis-and-treatment
#14
REVIEW
Neil S Mandel, Ian C Mandel, Ann M Kolbach-Mandel
This manuscript reviews the requirements for acceptable compositional analysis of kidney stones using various biophysical methods. High-resolution X-ray powder diffraction crystallography and Fourier transform infrared spectroscopy (FTIR) are the only acceptable methods in our labs for kidney stone analysis. The use of well-constructed spectral reference libraries is the basis for accurate and complete stone analysis. The literature included in this manuscript identify errors in most commercial laboratories and in some academic centers...
December 3, 2016: Urolithiasis
https://www.readbyqxmd.com/read/27915362/teaching-health-care-students-the-radial-arterial-puncture-procedure
#15
Kevin P Collins, Christopher J Russian, Joshua F Gonzales
The radial artery puncture is a frequently ordered medical procedure for patients requiring blood gas analysis. Deviating from the proper procedure increases the likelihood of error and jeopardizes patient safety. The teaching methodology for the radial artery puncture is rarely addressed in the medical literature. First-year respiratory care students enrolled in a clinical practice course participated in an expanded curriculum on arterial puncture technique. The new five-step curriculum included: 1) a face-to-face lecture, 2) radial artery localization, 3) blunt-tipped needle simulation, 4) manikin arm puncture, and 5) a peer assessment video...
2016: Journal of Allied Health
https://www.readbyqxmd.com/read/27915360/patient-safety-organizations-and-emergency-medical-services
#16
William J Leggio, Lee Varner, Kathryn Wire
Providing safe and error-free patient care should resonate well with all healthcare providers including emergency medical technicians. The environments and circumstances in which emergency medical services (EMS) provide patient care inevitably create risks to both the provider and patient. This article explores the concepts of patient safety, errors, near misses, adverse events, and Just Culture. Literature raises concerns about the lack of data collection on both patient and provider safety and research on these safety topics in EMS...
2016: Journal of Allied Health
https://www.readbyqxmd.com/read/27915294/insightful-directed-evolution-of-escherichia-coli-quorum-sensing-promoter-region-of-the-lsracdbfg-operon-a-tool-for-synthetic-biology-systems-and-protein-expression
#17
Pricila Hauk, Kristina Stephens, Ryan Mckay, Chelsea Ryan Virgile, Hana Ueda, Marc Ostermeier, Kyoung-Seok Ryu, Herman O Sintim, William E Bentley
Quorum sensing (QS) regulates many natural phenotypes (e.q. virulence, biofilm formation, antibiotic resistance), and its components, when incorporated into synthetic genetic circuits, enable user-directed phenotypes. We created a library of Escherichia coli lsr operon promoters using error-prone PCR (ePCR) and selected for promoters that provided E. coli with higher tetracycline resistance over the native promoter when placed upstream of the tet(C) gene. Among the fourteen clones identified, we found several mutations in the binding sites of QS repressor, LsrR...
December 1, 2016: Nucleic Acids Research
https://www.readbyqxmd.com/read/27915213/case-report-of-cholelithiasis-in-a-patient-with-type-1-gaucher-disease
#18
Afrim Avdaj, Naim Fanaj, Mirsade Osmani, Agron Bytyqi, Anila Cake
INTRODUCTION: Patients with type 1 Gaucher disease have been reported to be more likely to have cholelithiasis. PRESENTATION OF CASE: A case of cholelithiasis in a patient with type 1 Gaucher disease; which is very intriguing to show this comorbidity. The case was the only known case with this pathology in time of diagnosis in our country (Kosovo). The patient is a 21-year old girl a known case of type 1 Gaucher disease, at the age of 8 years. The patient underwent elective laparoscopic cholecystectomy...
November 11, 2016: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/27914730/quantitative-comparison-of-operative-skill-using-2-and-3-dimensional-monitors-during-laparoscopic-phantom-tasks
#19
Masayasu Nishi, Shingo Kanaji, Yoshito Otake, Hitoshi Harada, Masashi Yamamoto, Taro Oshikiri, Tetsu Nakamura, Satoshi Suzuki, Yuki Suzuki, Yuta Hiasa, Yoshinobu Sato, Yoshihiro Kakeji
BACKGROUND: The recent development of stereoscopic images using 3-dimensional monitors is expected to improve techniques for laparoscopic operation. Several studies have reported technical advantages in using 3-dimensional monitors with regard to operative accuracy and working speed, but there are few reports that analyze forceps motions by 3-dimensional optical tracking systems during standardized laparoscopic phantom tasks. We attempted to develop a 3-dimensional motion analysis system for assessing laparoscopic tasks and to clarify the efficacy of using stereoscopic images from a 3-dimensional monitor to track forceps movement during laparoscopy...
November 30, 2016: Surgery
https://www.readbyqxmd.com/read/27914209/methodological-flaws-introduce-strong-bias-into-molecular-analysis-of-microbial-populations
#20
Niclas Krakat, Reshma Anjum, Burak Demirel, Patrick Schröder
AIMS: Here we report how different cell disruption methods, PCR primers and in-silico analyses can seriously bias results from microbial population studies, with consequences for the credibility and reproducibility of the findings. Our results emphasize the pitfalls of commonly used experimental methods that can seriously weaken the interpretation of results. METHODS AND RESULTS: Four different cell lysis methods, three commonly used primer pairs and various computer-based analyses were applied to investigate the microbial diversity of a fermentation sample composed of chicken dung...
December 3, 2016: Journal of Applied Microbiology
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