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https://www.readbyqxmd.com/read/28743153/-how-much-alarm-can-the-human-being-tolerate
#1
Benedikt Lorenz, Jürgen Peters, Ulrich H Frey
Due to growing technisation of intensive care the number of devices with integrated alarm systems is steadily increasing. However, most of the sounding alarms are false alarms causing high levels of frustration, aggression and inappropriate behaviour amongst the medical personnel. All this jeopardises patient care. The high number of alarms also disturb the patients interrupting their sleep and provokes anxiety, and also increases the already high noise level in intensive care units and the operating theatre alike...
July 2017: Anästhesiologie, Intensivmedizin, Notfallmedizin, Schmerztherapie: AINS
https://www.readbyqxmd.com/read/28742633/stable-longitudinal-performance-of-adult-cochlear-implant-users-for-more-than-10-years
#2
Kristen Rak, Sebastian P Schraven, Philipp Schendzielorz, Anja Kurz, Wafaa Shehata-Dieler, Rudolf Hagen, Andreas Radeloff
OBJECTIVE: To analyze the long-term performance of cochlear implant patients. STUDY DESIGN: Retrospective longitudinal study. SETTING: Tertiary referral center with a large cochlear implant program. MAIN OUTCOME MEASURE: Speech perception scores in quiet and in background noise in the short-term (1.12 ± 0.15 yr) and long-term (12.61 ± 2.34 yr) after implantation. PATIENTS: Fifty-eight implanted ears from 55 patients with a mean age of 51...
July 24, 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/28742424/evaluation-of-noise-exposure-secondary-to-wind-noise-in-cyclists
#3
Michael D Seidman, Anna G Wertz, Matthew M Smith, Steve Jacob, Syed F Ahsan
Objective Determine if the noise levels of wind exposure experienced by cyclists reach levels that could contribute to noise-induced hearing loss. Study Design Industrial lab research. Setting Industrial wind tunnel. Subjects and Methods A commercial-grade electric wind tunnel was used to simulate different speeds encountered by a cyclist. A single cyclist was used during the simulation for audiometric measurements. Microphones attached near the ears of the cyclist were used to measure the sound (dB sound pressure level) experienced by the cyclist...
July 1, 2017: Otolaryngology—Head and Neck Surgery
https://www.readbyqxmd.com/read/28742083/long-time-analytic-approximation-of-large-stochastic-oscillators-simulation-analysis-and-inference
#4
Giorgos Minas, David A Rand
In order to analyse large complex stochastic dynamical models such as those studied in systems biology there is currently a great need for both analytical tools and also algorithms for accurate and fast simulation and estimation. We present a new stochastic approximation of biological oscillators that addresses these needs. Our method, called phase-corrected LNA (pcLNA) overcomes the main limitations of the standard Linear Noise Approximation (LNA) to remain uniformly accurate for long times, still maintaining the speed and analytically tractability of the LNA...
July 24, 2017: PLoS Computational Biology
https://www.readbyqxmd.com/read/28742062/a-method-to-incorporate-the-effect-of-beam-quality-on-image-noise-in-a-digitally-reconstructed-radiograph-drr-based-computer-simulation-for-optimisation-of-digital-radiography
#5
Craig S Moore, Tim J Wood, John R Saunderson, Andy W Beavis
The use of computer simulated digital x-radiographs for optimisation purposes has become widespread in recent years. To make these optimisation investigations effective, it is vital simulated radiographs contain accurate anatomical and system noise. Computer algorithms that simulate radiographs based solely on the incident detector x-ray intensity ('dose') have been reported extensively in the literature. However, while it has been established for digital mammography that x-ray beam quality is an important factor when modelling noise in simulated images there are no such studies for diagnostic imaging of the chest, abdomen and pelvis...
July 25, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28742047/optimal-broadband-noise-matching-to-inductive-sensors-application-to-magnetic-particle-imaging
#6
Bo Zheng, Patrick W Goodwill, Neerav Dixit, Di Xiao, Wencong Zhang, Beliz Gunel, Kuan Lu, Greig C Scott, Steven M Conolly
Inductive sensor-based measurement techniques are useful for a wide range of biomedical applications. However, optimizing the noise performance of these sensors is challenging at broadband frequencies, owing to the frequency-dependent reactance of the sensor. In this work, we describe the fundamental limits of noise performance and bandwidth for these sensors in combination with a low-noise amplifier. We also present three equivalent methods of noise matching to inductive sensors using transformer-like network topologies...
July 20, 2017: IEEE Transactions on Biomedical Circuits and Systems
https://www.readbyqxmd.com/read/28742039/reconstructing-interlaced-high-dynamic-range-video-using-joint-learning
#7
Inchang Choi, Seung-Hwan Baek, Min H Kim
For extending the dynamic range of video, it is a common practice to capture multiple frames sequentially with different exposures and combine them to extend the dynamic range of each video frame. However, this approach results in typical ghosting artifacts due to fast and complex motion in nature. As an alternative, video imaging with interlaced exposures has been introduced to extend the dynamic range. However, the interlaced approach has been hindered by jaggy artifacts and sensor noise, leading to concerns over image quality...
July 24, 2017: IEEE Transactions on Image Processing: a Publication of the IEEE Signal Processing Society
https://www.readbyqxmd.com/read/28741641/highly-oriented-langmuir-blodgett-film-of-silver-cuboctahedra-as-an-effective-matrix-free-sample-plate-for-surface-assisted-laser-desorption-ionization-mass-spectrometry
#8
Tsung-Rong Kuo, Yin-Chien Chen, Chiung-I Wang, Tzu-Hau Shen, Hong-Yi Wang, Xi-Yu Pan, Di-Yan Wang, Chien-Chung Liou, Yi-Hsuan Chang, Yi-Chia Chen, Yueh-Hsiu Wu, Yun-Ru Liu, Yun-Ho Lin, Cho-Chun Hu, Chia-Chun Chen
The design of a homogeneous sample plate to solve the sweet heating spot issues is the key step to expand the applicability of surface-assisted laser desorption/ionization mass spectrometry (SALDI MS). Herein, large-scale and highly oriented Langmuir-Blodgett (LB) films of uniform silver nanocrystals have been fabricated as a highly efficient and matrix-free sample plate for SALDI MS. Three individual silver nanocrystals (cubes, cuboctahedra and octahedra) assembled LB films have been applied as the sample plates for glucose detection by SALDI MS without an additional matrix...
July 25, 2017: Nanoscale
https://www.readbyqxmd.com/read/28741597/motion-compensation-for-cone-beam-ct-using-fourier-consistency-conditions
#9
Martin Berger, Yan Xia, Wolfgang Aichinger, Katrin Mentl, Mathias Unberath, Andre Aichert, Christian Riess, Joachim Hornegger, Rebecca Fahrig, Andreas Konrad Maier
In cone-beam CT, involuntary patient motion and inaccurate or irreproducible scanner motion substantially degrades image quality. To avoid artifacts this motion needs to be estimated and compensated during image reconstruction. In previous work we showed that Fourier Consistency Conditions (FCC) can be used in fan-beam CT to estimate motion in the sinogram domain. This work extends the FCC to 3-D cone-beam CT. We derive an efficient cost function to compensate for 3-D motion using 2-D detector translations...
July 25, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28741253/dissociations-of-the-number-and-precision-of-visual-short-term-memory-representations-in-change-detection
#10
Weizhen Xie, Weiwei Zhang
The present study dissociated the number (i.e., quantity) and precision (i.e., quality) of visual short-term memory (STM) representations in change detection using receiver operating characteristic (ROC) and experimental manipulations. Across three experiments, participants performed both recognition and recall tests of visual STM using the change-detection task and the continuous color-wheel recall task, respectively. Experiment 1 demonstrated that the estimates of the number and precision of visual STM representations based on the ROC model of change-detection performance were robustly correlated with the corresponding estimates based on the mixture model of continuous-recall performance...
July 24, 2017: Memory & Cognition
https://www.readbyqxmd.com/read/28740907/functional-imaging-equivalence-and-proof-of-concept-for-image-guided-adaptive-radiotherapy-with-fixed-gantry-and-rotating-couch
#11
Ilana Feain, Chun-Chien Shieh, Paul White, Ricky O'Brien, Sandra Fisher, William Counter, Peter Lazarakis, David Stewart, Simon Downes, Michael Jackson, Siddhartha Baxi, Brendan Whelan, Kuldeep Makhija, Chen-Yu Huang, Michael Barton, Paul Keall
PURPOSE: The purpose of this article is to present the first imaging experiments to demonstrate the functional equivalence between a conventional rotational gantry and a fixed-beam imaging geometry, and the feasibility of an iterative image-reconstruction technique under gravitational deformation. METHODS AND MATERIALS: Experiments were performed using an Elekta Axesse with Agility MLC and XVI, a custom-built rotating phantom stage, a Catphan QA phantom, and a porcine heart...
October 2016: Advances in Radiation Oncology
https://www.readbyqxmd.com/read/28740677/assessment-of-thoracic-vasculature-in-patients-with-central-bronchogenic-carcinoma-by-unenhanced-magnetic-resonance-angiography-comparison-between-2d-free-breathing-truefisp-2d-breath-hold-truefisp-and-3d-respiratory-triggered-space
#12
Lili Wang, Peng Lv, Shuohui Yang, Mengsu Zeng, Jiang Lin
BACKGROUND: Preoperative assessment of the integrity of major thoracic vessels in central bronchogenic carcinoma is vital for tumor staging and treatment planning. Contrast-enhanced CT is currently the first choice of modality for this purpose in clinical practice with limitations including exposure to ionizing radiation and the use of iodinated contrast material. MRI has been increasingly employed for the staging of lung cancer. More recently, unenhanced magnetic resonance angiography (MRA) which is totally non-invasive and contrast-free has been reported able to show thoracic vessels...
June 2017: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/28740371/influence-of-environmental-factors-on-food-intake-among-nursing-home-residents-a-survey-combined-with-a-video-approach
#13
Fanny Buckinx, Jean-Yves Reginster, Alison Morelle, Nicolas Paquot, Nicole Labeye, Médéa Locquet, Stéphane Adam, Olivier Bruyère
BACKGROUND: In addition to the well-known physiological factors, dietary behavior that affects health seems to be influenced by a wide variety of environmental factors. The aim of this study was to assess, by means of an original video approach, the influence of the environment on food intake in nursing homes. METHODS: The perception of the environment during meals in nursing homes was evaluated by residents and by two groups of volunteers who either work in the field of geriatrics, or who do not work in the field of geriatrics...
2017: Clinical Interventions in Aging
https://www.readbyqxmd.com/read/28739527/deconstructing-the-cortical-column-in-the-barrel-cortex
#14
Kevin Fox
The question of what function is served by the cortical column has occupied neuroscientists since its original description some 60 years ago. The answer seems tractable in the somatosensory cortex when considering the inputs to the cortical column and the early stages of information processing, but quickly breaks down once the multiplicity of output streams and their sub-circuits are brought into consideration. This article describes the early stages of information processing in the barrel cortex, through generation of the centre and surround receptive field components of neurones that subserve integration of multi whisker information, before going on to consider the diversity of properties exhibited by the layer 5 output neurones...
July 21, 2017: Neuroscience
https://www.readbyqxmd.com/read/28738811/associations-of-genetic-variation-in-casp3-gene-with-noise-induced-hearing-loss-in-a-chinese-population-a-case-control-study
#15
Yinyin Wu, Juntao Ni, Mingjian Qi, Chengjian Cao, Yuxian Shao, Liangwen Xu, Haiyan Ma, Lei Yang
BACKGROUND: Noise-induced hearing loss (NIHL) is a complex disease caused by environmental and genetic risk factors. This study explored the relationship between the genetic variations in the CASP gene and the risk of developing NIHL among Chinese workers exposed to occupational noise. METHODS: A case-control study of 272 NIHL workers and 272 normal-hearing workers matched for age, sex and years of noise exposure was conducted. Fifteen single-nucleotide polymorphisms (SNP) in the CASP1, CASP3, CASP4, CASP5, CASP6, CASP8, CASP9, CASP10 and CASP14 genes were genotyped using the polymerase chain reaction-ligase detection reaction method...
July 24, 2017: Environmental Health: a Global Access Science Source
https://www.readbyqxmd.com/read/28738681/optimizing-high-resolution-mass-spectrometry-for-the-identification-of-low-abundance-post-translational-modifications-of-intact-proteins
#16
Lisa E Kilpatrick, Eric L Kilpatrick
Intact protein analysis by liquid chromatography-mass spectrometry (LC-MS) is now possible due to the improved capabilities of mass spectrometers yielding greater resolution, mass accuracy, and extended mass ranges. Concurrent measurement of post-translational modifications (PTMs) during LC-MS of intact proteins is advantageous while monitoring critical proteoform status, such as for clinical samples or during production of reference materials. However, difficulties exist for PTM identification when the protein is large or contains multiple modification sites...
July 25, 2017: Journal of Proteome Research
https://www.readbyqxmd.com/read/28738599/development-of-a-chemiluminescent-dna-fibre-optic-genosensor-to-hepatitis-a-virus-hav
#17
Kehan Ye, Marisa Manzano, Riccardo Muzzi, Karina Yew-Hoong Gin, Nazanin Saeidi, Shin Giek Goh, Alfred Iing Yoong Tok, Robert S Marks
Hepatitis A virus (HAV) infection has caused substantial morbidity and economic losses to human society, presenting a major public health problem in many parts of the world. Despite the capability for low-concentration detection, current PCR-based techniques are limited by the requirement of specialized lab equipment, trained personnel and a relatively large time-commitment. The need for a prompt in-field quantitative identification of HAV in real samples has led us to develop a chemiluminescent fibre optic genosensor system...
November 1, 2017: Talanta
https://www.readbyqxmd.com/read/28738138/vocabulary-facilitates-speech-perception-in-children-with-hearing-aids
#18
Kelsey E Klein, Elizabeth A Walker, Benjamin Kirby, Ryan W McCreery
Purpose: We examined the effects of vocabulary, lexical characteristics (age of acquisition and phonotactic probability), and auditory access (aided audibility and daily hearing aid [HA] use) on speech perception skills in children with HAs. Method: Participants included 24 children with HAs and 25 children with normal hearing (NH), ages 5-12 years. Groups were matched on age, expressive and receptive vocabulary, articulation, and nonverbal working memory. Participants repeated monosyllabic words and nonwords in noise...
July 24, 2017: Journal of Speech, Language, and Hearing Research: JSLHR
https://www.readbyqxmd.com/read/28737675/3d-reconstruction-of-space-objects-from-multi-views-by-a-visible-sensor
#19
Haopeng Zhang, Quanmao Wei, Zhiguo Jiang
In this paper, a novel 3D reconstruction framework is proposed to recover the 3D structural model of a space object from its multi-view images captured by a visible sensor. Given an image sequence, this framework first estimates the relative camera poses and recovers the depths of the surface points by the structure from motion (SFM) method, then the patch-based multi-view stereo (PMVS) algorithm is utilized to generate a dense 3D point cloud. To resolve the wrong matches arising from the symmetric structure and repeated textures of space objects, a new strategy is introduced, in which images are added to SFM in imaging order...
July 22, 2017: Sensors
https://www.readbyqxmd.com/read/28737634/noise-reduction-to-reduce-patient-anxiety-during-cast-removal-can-we-decrease-patient-anxiety-with-cast-removal-by-wearing-noise-reduction-headphones-during-cast-saw-use
#20
Susan T Mahan, Marie S Harris, Anneliese M Lierhaus, Patricia E Miller, Rachel L DiFazio
BACKGROUND: Noise reduction headphones decrease the sound during cast removal. Their effectiveness in decreasing anxiety has not been studied. PURPOSE: Compare pediatric patients' anxiety levels during cast removal with and without utilization of noise reduction headphones combined with use of a personal electronic device. METHODS: Quality improvement project. Patients randomly assigned to noise reduction headphone group or standard care group during cast removal...
July 2017: Orthopaedic Nursing
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