keyword
MENU ▼
Read by QxMD icon Read
search

Multi channel monitor

keyword
https://www.readbyqxmd.com/read/28534810/non-invasive-fetal-monitoring-a-maternal-surface-ecg-electrode-placement-based-novel-approach-for-optimization-of-adaptive-filter-control-parameters-using-the-lms-and-rls-algorithms
#1
Radek Martinek, Radana Kahankova, Homer Nazeran, Jaromir Konecny, Janusz Jezewski, Petr Janku, Petr Bilik, Jan Zidek, Jan Nedoma, Marcel Fajkus
This paper is focused on the design, implementation and verification of a novel method for the optimization of the control parameters (such as step size μ and filter order N) of LMS and RLS adaptive filters used for noninvasive fetal monitoring. The optimization algorithm is driven by considering the ECG electrode positions on the maternal body surface in improving the performance of these adaptive filters. The main criterion for optimal parameter selection was the Signal-to-Noise Ratio (SNR). We conducted experiments using signals supplied by the latest version of our LabVIEW-Based Multi-Channel Non-Invasive Abdominal Maternal-Fetal Electrocardiogram Signal Generator, which provides the flexibility and capability of modeling the principal distribution of maternal/fetal ECGs in the human body...
May 19, 2017: Sensors
https://www.readbyqxmd.com/read/28492345/the-focinator-v2-0-graphical-interface-four-channels-colocalization-analysis-and-cell-phase-identification
#2
Sebastian Oeck, Nathalie M Malewicz, Sebastian Hurst, Klaudia Al-Refae, Adam Krysztofiak, Verena Jendrossek
The quantitative analysis of foci plays an important role in various cell biological methods. In the fields of radiation biology and experimental oncology, the effect of ionizing radiation, chemotherapy or molecularly targeted drugs on DNA damage induction and repair is frequently performed by the analysis of protein clusters or phosphorylated proteins recruited to so called repair foci at DNA damage sites, involving for example γ-H2A.X, 53BP1 or RAD51. We recently developed "The Focinator" as a reliable and fast tool for automated quantitative and qualitative analysis of nuclei and DNA damage foci...
May 11, 2017: Radiation Research
https://www.readbyqxmd.com/read/28481751/robust-heart-rate-from-fitness-videos
#3
Wenjin Wang, Albertus C den Brinker, Sander Stuijk, Gerard de Haan
Remote photoplethysmography (rPPG) enables contactless heart-rate monitoring using a regular video camera. OBJECTIVE: This paper aims to improve the rPPG technology targeting continuous heart-rate measurement during fitness exercises. The fundamental limitation of the existing (multi-wavelength) rPPG methods is that they can suppress at most n  -  1 independent distortions by linearly combining n wavelength color channels. Their performance are highly restricted when more than n  -  1 independent distortions appear in a measurement, as typically occurs in fitness applications with vigorous body motions...
May 8, 2017: Physiological Measurement
https://www.readbyqxmd.com/read/28474599/multi-feature-classifiers-for-burst-detection-in-single-eeg-channels-from-preterm-infants
#4
Xavier Navarro, Fabienne Poree, Mathieu Kuchenbuch, Mario Chavez, Alain Beuchée, Guy Carrault
<i>Objective</i>: The study of electroencephalographic (EEG) bursts in preterm infants provides valuable information about maturation or prognostication after perinatal asphyxia. Over the last two decades, a number of works proposed algorithms to automatically detect EEG bursts in preterm infants, but they were designed for populations under 35 weeks of post menstrual age (PMA). However, as the brain activity evolves rapidly during postnatal life, these solutions might be under-performing with increasing PMA...
May 5, 2017: Journal of Neural Engineering
https://www.readbyqxmd.com/read/28463185/tr-breath-time-reversal-breathing-rate-estimation-and-detection
#5
Chen Chen, Yi Han, Yan Chen, Hung-Quoc Lai, Feng Zhang, Beibei Wang, K J Ray Liu
In this paper, we introduce TR-BREATH, a timereversal (TR) based contact-free breathing monitoring system. It is capable of breathing detection and multi-person breathing rate estimation within a short period of time using off-the-shelf WiFi devices. The proposed system exploits the channel state information (CSI) to capture the miniature variations in the environment caused by breathing. To magnify the CSI variations, TRBREATH projects CSIs into the TR resonating strength (TRRS) feature space and analyzes the TRRS by the Root-MUSIC and affinity propagation algorithms...
April 28, 2017: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/28455820/a-review-of-source-tracking-techniques-for-fine-sediment-within-a-catchment
#6
REVIEW
Zhuo Guan, Xiang-Yu Tang, Jae E Yang, Yong Sik Ok, Zhihong Xu, Taku Nishimura, Brian J Reid
Excessive transport of fine sediment, and its associated pollutants, can cause detrimental impacts in aquatic environments. It is therefore important to perform accurate sediment source apportionment to identify hot spots of soil erosion. Various tracers have been adopted, often in combination, to identify sediment source type and its spatial origin; these include fallout radionuclides, geochemical tracers, mineral magnetic properties and bulk and compound-specific stable isotopes. In this review, the applicability of these techniques to particular settings and their advantages and limitations are reviewed...
April 28, 2017: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/28444504/correction-of-parallel-transmission-using-concurrent-rf-and-gradient-field-monitoring
#7
Mustafa Çavuşoğlu, Benjamin Emanuel Dietrich, David Otto Brunner, Markus Weiger, Klaas Paul Pruessmann
OBJECTIVES: The accuracy and precision of the parallel RF excitations are highly dependent on the spatial and temporal fidelity of the magnetic fields involved in spin excitation. The consistency between the nominal and effective fields is typically limited by the imperfections of the employed hardware existing both in the gradient system and the RF chain. In this work, we experimentally presented highly improved spatially tailored parallel excitations by turning the native hardware accuracy challenge into a measurement and control problem using an advanced field camera technology to fully correct parallel RF transmission experiment...
April 25, 2017: Magma
https://www.readbyqxmd.com/read/28410579/assessing-the-usability-by-clinicians-of-vision-a-hierarchical-display-of-patient-collected-physiological-information-to-clinicians
#8
Cubby L Gardner, Fang Liu, Paul Fontelo, Michael C Flanagan, Albert Hoang, Harry B Burke
BACKGROUND: The inability of patients to accurately and completely recount their clinical status between clinic visits reduces the clinician's ability to properly manage their patients. One way to improve this situation is to collect objective patient information while the patients are at home and display the collected multi-day clinical information in parallel on a single screen, highlighting threshold violations for each channel, and allowing the viewer to drill down to any analog signal on the same screen, while maintaining the overall physiological context of the patient...
April 14, 2017: BMC Medical Informatics and Decision Making
https://www.readbyqxmd.com/read/28380959/revisiting-short-wave-infrared-swir-bands-for-atmospheric-correction-in-coastal-waters
#9
Nima Pahlevan, Jean-Claude Roger, Ziauddin Ahmad
The shortwave infrared (SWIR) bands on the existing Earth Observing missions like MODIS have been designed to meet land and atmospheric science requirements. The future geostationary and polar-orbiting ocean color missions, however, require highly sensitive SWIR bands (> 1550nm) to allow for a precise removal of aerosol contributions. This will allow for reasonable retrievals of the remote sensing reflectance (R<sub>rs</sub>) using standard NASA atmospheric corrections over turbid coastal waters...
March 20, 2017: Optics Express
https://www.readbyqxmd.com/read/28380735/three-dimensional-dynamic-measurements-of-ch-and-c2-concentrations-in-flame-using-simultaneous-chemiluminescence-tomography
#10
Ying Jin, Yang Song, Xiangju Qu, Zhenhua Li, Yunjing Ji, Anzhi He
The species concentrations of flame chemiluminescence play important role in combustion diagnostics, such as CH* and C2* of hydrocarbon flame, which can provide specific characteristics in combustion control and monitoring. In order to realize both CH* and C2* chemiluminescence intensity detection in propane-air diffusion flame simultaneously, we present three-dimensional dynamic flame detecting method for species concentration determination. Firstly, quantitative flame chemiluminescence multispectral separation technique based on color cameras coupled with double-channel bandpass filters is adopted for dual channel signal division...
March 6, 2017: Optics Express
https://www.readbyqxmd.com/read/28380030/reduced-left-precentral-regional-responses-in-patients-with-major-depressive-disorder-and-history-of-suicide-attempts
#11
Noa Tsujii, Wakako Mikawa, Emi Tsujimoto, Toru Adachi, Atsushi Niwa, Hisae Ono, Osamu Shirakawa
Previous neuroimaging studies have revealed frontal and temporal functional abnormalities in patients with major depressive disorder (MDD) and a history of suicidal behavior. However, it is unknown whether multi-channel near-infrared spectroscopy (NIRS) signal changes among individuals with MDD are associated with a history of suicide attempts and a diathesis for suicidal behavior (impulsivity, hopelessness, and aggression). Therefore, we aimed to explore frontotemporal hemodynamic responses in depressed patients with a history of suicide attempts using 52-channel NIRS...
2017: PloS One
https://www.readbyqxmd.com/read/28353681/a-cardiac-early-warning-system-with-multi-channel-scg-and-ecg-monitoring-for-mobile-health
#12
Prasan Kumar Sahoo, Hiren Kumar Thakkar, Ming-Yih Lee
Use of information and communication technology such as smart phone, smart watch, smart glass and portable health monitoring devices for healthcare services has made Mobile Health (mHealth) an emerging research area. Coronary Heart Disease (CHD) is considered as a leading cause of death world wide and an increasing number of people die prematurely due to CHD. Under such circumstances, there is a growing demand for a reliable cardiac monitoring system to catch the intermittent abnormalities and detect critical cardiac behaviors which lead to sudden death...
March 29, 2017: Sensors
https://www.readbyqxmd.com/read/28347872/ultrasonic-method-for-monitoring-the-clotting-process-during-whole-blood-coagulation
#13
A Voleisis, R Kazys, B Voleisiene, R Sliteris, L Mazeika
The purpose of this work was to develop a multichannel ultrasonic measurement method for monitoring a spatially non-uniform blood clotting process. This novel method is based on simultaneous multi-channel measurements of ultrasound propagation velocities in different horizontal cross-sections of clotting blood. The most common method used for determining blood-clotting time is the capillary tube method. For this purpose ultrasonic methods based on measurements of the velocities of ultrasound waves in clotting blood are also used...
February 24, 2017: Ultrasonics
https://www.readbyqxmd.com/read/28336426/sar-simulations-safety
#14
Thomas M Fiedler, Mark E Ladd, Andreas K Bitz
At ultra-high fields, the assessment of radiofrequency (RF) safety presents several new challenges compared to low-field systems. Multi-channel RF transmit coils in combination with parallel transmit techniques produce time-dependent and spatially varying power loss densities in the tissue. Further, in ultra-high-field systems, localized field effects can be more pronounced due to a transition from the quasistationary to the electromagnetic field regime. Consequently, local information on the RF field is required for reliable RF safety assessment as well as for monitoring of RF exposure during MR examinations...
March 20, 2017: NeuroImage
https://www.readbyqxmd.com/read/28322213/chronic-monitoring-of-lower-urinary-tract-activity-via-a-sacral-dorsal-root-ganglia-interface
#15
Abeer Khurram, Shani E Ross, Zachariah J Sperry, Aileen Ouyang, Christopher Stephan, Ahmad A Jiman, Tim M Bruns
OBJECTIVE: Our goal is to develop an interface that integrates chronic monitoring of lower urinary tract (LUT) activity with stimulation of peripheral pathways. APPROACH: Penetrating microelectrodes were implanted in sacral dorsal root ganglia (DRG) of adult male felines. Peripheral electrodes were placed on or in the pudendal nerve, bladder neck and near the external urethral sphincter. Supra-pubic bladder catheters were implanted for saline infusion and pressure monitoring...
June 2017: Journal of Neural Engineering
https://www.readbyqxmd.com/read/28269558/a-110-nw-in-channel-sigma-delta-converter-for-large-scale-neural-recording-implants
#16
M Rezaei, E Maghsoudloo, M Sawan, B Gosselin
Advancement in wireless and microsystems technology have ushered in new devices that can directly interface with the central nervous system for stimulating and/or monitoring neural circuitry. In this paper, we present an ultra low-power sigma-delta analog-to-digital converter (ADC) intended for utilization into large-scale multi-channel neural recording implants. This proposed design, which provides a resolution of 9 bits using a one-bit oversampled ADC, presents several desirable features that allow for an in-channel ADC scheme, where one sigma-delta converter is provided for each channel, enabling development of scalable systems that can interface with different types of high-density neural microprobes...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28269032/monitoring-and-detecting-atrial-fibrillation-using-wearable-technology
#17
Shamim Nemati, Mohammad M Ghassemi, Vaidehi Ambai, Nino Isakadze, Oleksiy Levantsevych, Amit Shah, Gari D Clifford
Atrial fibrillation (AFib) is diagnosed by analysis of the morphological and rhythmic properties of the electrocardiogram. It was recently shown that accurate detection of AFib is possible using beat-to-beat interval variations. This raises the question of whether AFib detection can be performed using a pulsatile waveform such as the Photoplethysmogram (PPG). The recent explosion in use of recreational and professional ambulatory wrist-based pulse monitoring devices means that an accurate pulse-based AFib screening algorithm would enable large scale screening for silent or undiagnosed AFib, a significant risk factor for multiple diseases...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28268942/towards-a-multi-wavelength-spectroscopy-platform-for-blood-characterization-and-analysis
#18
Alireza Avakh Kisomi, Hamza Landari, Mounir Boukadoum, Amine Miled, Benoit Gosselin
Passing multiple light wavelengths through a blood sample makes it possible to investigate the presence and composition of cells, metabolytes and analytes such as blood cells, glucose, lactate and oxygen, providing valuable indications for diagnostic and health monitoring. In this paper, we present a test prototype of a multi-wavelength blood spectroscopy platform integrated with a microfluidic substrate to collect and convey blood samples through a series of micro-LEDs and a photo-detector. This spectroscopy platform is a proof of concept for a system that can collect absorbance and transmittance parameters of blood samples at several wavelengths within the visible and NIR spectrum, and transmit them wirelessly to a base station for real-time calculation and analysis...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28255956/sound-level-intensity-severely-disrupts-sleep-in-ventilated-icu-patients-throughout-a-24-h-period-a-preliminary-24-h-study-of-sleep-stages-and-associated-sound-levels
#19
Maxime Elbaz, Damien Léger, Fabien Sauvet, Benoit Champigneulle, Stéphane Rio, Mélanie Strauss, Mounir Chennaoui, Christian Guilleminault, Jean Paul Mira
BACKGROUND: It is well recognized that sleep is severely disturbed in patients in intensive care units (ICU) and that this can compromise their rehabilitation potential. However, it is still difficult to objectively assess sleep quantity and quality and the determinants of sleep disturbance remain unclear. The aim of this study was therefore to evaluate carefully the impact of ICU sound intensity levels and their sources on ICU patients' sleep over a 24-h period. METHODS: Sleep and sound levels were recorded in 11 ICU intubated patients who met the criteria...
December 2017: Annals of Intensive Care
https://www.readbyqxmd.com/read/28242116/multi-temporal-monitoring-of-a-regional-riparian-buffer-network-12-000%C3%A2-km-with-lidar-and-photogrammetric-point-clouds
#20
Adrien Michez, Hervé Piégay, Philippe Lejeune, Hugues Claessens
Riparian buffers are of major concern for land and water resource managers despite their relatively low spatial coverage. In Europe, this concern has been acknowledged by different environmental directives which recommend multi-scale monitoring (from local to regional scales). Remote sensing methods could be a cost-effective alternative to field-based monitoring, to build replicable "wall-to-wall" monitoring strategies of large river networks and associated riparian buffers. The main goal of our study is to extract and analyze various parameters of the riparian buffers of up to 12,000 km of river in southern Belgium (Wallonia) from three-dimensional (3D) point clouds based on LiDAR and photogrammetric surveys to i) map riparian buffers parameters on different scales, ii) interpret the regional patterns of the riparian buffers and iii) propose new riparian buffer management indicators...
February 24, 2017: Journal of Environmental Management
keyword
keyword
97655
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"