Journal articles on the topic 'OPEP devices'
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Alghamdi, Saeed M., Ruth Emily Barker, Abdullah S. S. Alsulayyim, Ali M. Alasmari, Winston A. S. Banya, Michael I. Polkey, Surinder S. Birring, and Nicholas S. Hopkinson. "Use of oscillatory positive expiratory pressure (OPEP) devices to augment sputum clearance in COPD: a systematic review and meta-analysis." Thorax 75, no. 10 (August 11, 2020): 855–63. http://dx.doi.org/10.1136/thoraxjnl-2019-214360.
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IntroductionOscillating positive expiratory pressure (OPEP) devices are intended to facilitate sputum clearance in chronic obstructive pulmonary disease (COPD), but there is uncertainty as to their place in treatment pathways. We aimed to review the existing literature to establish the evidence base for their use.MethodsA systematic search of records up to March 2020 was performed on PubMed, CINAHL, Medline (Ovid), Cochrane and Embase to retrieve clinical trials that evaluated the efficacy of OPEP devices in patients with COPD. Two independent reviewers retrieved the titles, abstracts and full texts, and completed the data extraction.ResultsFollowing full-text review of 77 articles, eight (six randomised control trials and 2 cross-over studies) were eligible for inclusion. Pooled analysis showed low-grade evidence that the use of OPEP devices was associated with decreased COPD symptoms and exacerbations (OR 0.37, 95% CI 0.19 to 0.72), and enhanced exercise capacity; 6 min walk distance (mean difference (95% CI), 49.8 m (14.2 m to 85.5 m); p=0.009]). However, studies were mostly short term with the majority having a high risk of bias. The average acceptance, completion and drop-out rates were 82%, 91% and 8%, respectively.ConclusionThe use of OPEP devices can have a positive impact in COPD, but confidence in effect sizes is low and there is a need for further, higher quality studies to examine their long-term efficacy in COPD as well as to identify specific patient phenotypes that are more likely to respond.PROSPERO registration numberCRD 42016041835.
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Parkhomenko, Hryhorii P., Erik O. Shalenov, Zarina Umatova, Karlygash N. Dzhumagulova, and Askhat N. Jumabekov. "Fabrication of Flexible Quasi-Interdigitated Back-Contact Perovskite Solar Cells." Energies 15, no. 9 (April 21, 2022): 3056. http://dx.doi.org/10.3390/en15093056.
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Perovskites are a promising class of semiconductor materials, which are being studied intensively for their applications in emerging new flexible optoelectronic devices. In this paper, device manufacturing and characterization of quasi-interdigitated back-contact perovskite solar cells fabricated on flexible substrates are studied. The photovoltaic parameters of the prepared flexible quasi-interdigitated back-contact perovskite solar cells (FQIBC PSCs) are obtained for the front- and rear-side illumination options. The dependences of the device’s open-circuit potential and short-circuit current on the illumination intensity are investigated to determine the main recombination pathways in the devices. Spectral response analysis of the devices demonstrates that the optical transmission losses can be minimized when FQIBC PSCs are illuminated from the front-side. Optoelectronic simulations are used to rationalize the experimental results. It is determined that the obtained FQIBC PSCs have high surface recombination losses, which hinder the device performance. The findings demonstrate a process for the fabrication of flexible back-contact PSCs and provide some directions for device performance improvements.
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Das, Nayan C., Minjae Kim, Sung-Min Hong, and Jae-Hyung Jang. "Vacuum and Low-Temperature Characteristics of Silicon Oxynitride-Based Bipolar RRAM." Micromachines 13, no. 4 (April 12, 2022): 604. http://dx.doi.org/10.3390/mi13040604.
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This study investigates the switching characteristics of the silicon oxynitride (SiOxNy)-based bipolar resistive random-access memory (RRAM) devices at different operating ambiances at temperatures ranging from 300 K to 77 K. The operating ambiances (open air or vacuum) and temperature affect the device’s performance. The electroforming-free multilevel bipolar Au/Ni/SiOxNy/p+-Si RRAM device (in open-air) becomes bilevel in a vacuum with an on/off ratio >104 and promising data retention properties. The device becomes more resistive with cryogenic temperatures. The experimental results indicate that the presence and absence of moisture (hydrogen and hydroxyl groups) in open air and vacuum, respectively, alter the elemental composition of the amorphous SiOxNy active layer and Ni/SiOxNy interface region. Consequently, this affects the overall device performance. Filament-type resistive switching and trap-controlled space charge limited conduction (SCLC) mechanisms in the bulk SiOxNy layer are confirmed.
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Longley, Matthew, Ethan L. Willis, Cindy X. Tay, and Hao Chen. "An open source device for operant licking in rats." PeerJ 5 (February 14, 2017): e2981. http://dx.doi.org/10.7717/peerj.2981.
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We created an easy-to-use device for operant licking experiments and another device that records environmental variables. Both devices use the Raspberry Pi computer to obtain data from multiple input devices (e.g., radio frequency identification tag readers, touch and motion sensors, environmental sensors) and activate output devices (e.g., LED lights, syringe pumps) as needed. Data gathered from these devices are stored locally on the computer but can be automatically transferred to a remote server via a wireless network. We tested the operant device by training rats to obtain either sucrose or water under the control of a fixed ratio, a variable ratio, or a progressive ratio reinforcement schedule. The lick data demonstrated that the device has sufficient precision and time resolution to record the fast licking behavior of rats. Data from the environment monitoring device also showed reliable measurements. By providing the source code and 3D design under an open source license, we believe these examples will stimulate innovation in behavioral studies. The source code can be found at http://github.com/chen42/openbehavior.
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Rosenthal, Victor Daniel. "Clinical impact of needle-free connector design: A systematic review of literature." Journal of Vascular Access 21, no. 6 (February 14, 2020): 847–53. http://dx.doi.org/10.1177/1129729820904904.
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The objective of this systematic review is to analyze types of needle-free connectors and open systems and their effects on central line–associated bloodstream infection rates and other adverse outcomes through a research protocol consistent with the Preferred Reporting Items for Systematic Reviews’ recommendations. MEDLINE and Cochrane databases of systematic reviews were searched for relevant comparative studies published from January 2000 to September 2017. Eighteen studies compared central line–associated bloodstream infection (according to the Centers for Disease Control and Prevention/National Healthcare Safety Network definition), internal microbial contamination, occlusions, phlebitis, and other outcomes associated with needle-free connectors with a positive displacement device, negative displacement device, neutral displacement device, or three-way stopcock. Ten studies reported central line–associated bloodstream infection rates, which were lower with positive displacement devices versus negative displacement devices/neutral displacement devices (one study) and with negative displacement devices versus three-way stopcocks (three studies), but varied with different positive displacement device and negative displacement device/neutral displacement device designs (four studies). Seven studies reported internal microbial contamination rates, which were higher with three-way stopcocks versus negative displacement devices (two studies) and positive displacement devices (two studies), lower when positive displacement devices were used versus neutral displacement devices (one study), and varied with different types of negative displacement device (one study). Central line–associated bloodstream infection rates and most other outcomes analyzed were statistically significantly higher with three-way stopcocks (open devices) versus positive displacement device, negative displacement devices, and neutral displacement devices, but varied among closed device designs.
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Peter, Lukas, Ladislav Hajek, Petra Maresova, Martin Augustynek, and Marek Penhaker. "Medical Devices: Regulation, Risk Classification, and Open Innovation." Journal of Open Innovation: Technology, Market, and Complexity 6, no. 2 (June 10, 2020): 42. http://dx.doi.org/10.3390/joitmc6020042.
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In the Czech Republic, the medical device industry is an important sector with a strong tradition and has high added value and perspectives in demand under changing demographic and social structures. The aim of this article is to describe and analyze the complex issues of the new European Commission Medical Device Regulation (MDR) 2017/745 from the perspective of the strategic decisions of companies that have to comply with the requirements imposed on them by the new legislation and at the same time fulfill their own business needs and goals. The legislative changes significantly affect the standards, processes, and certifications in the medical device sector. The classification system of medical devices has been revised to more appropriately reflect the possible health risks associated with use of modern high-end technology in healthcare. The requirement is to categorize each device under the highest possible risk class, which means for the medical device manufacturers to carefully review the new rules and regulations and classify their devices accordingly.
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Nishijima, Takamichi, Nobuhiro Yokoi, Yoichi Nakamoto, and Hiroyuki Ohsaki. "Estimation of Performance Improvement Derived from TCP/IP Offload Engine with Software Emulation." INTERNATIONAL JOURNAL OF COMPUTERS & TECHNOLOGY 12, no. 1 (December 20, 2013): 3117–30. http://dx.doi.org/10.24297/ijct.v12i1.3366.
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Many TOE (TCP/IP Offload Engine) devices have been developed and installed in high-end systems. Although there have been many analysis of the effectiveness of TOE devices, there remain open issues related to them. For example, it has not been clarified which part of TCP/IP processing should be performed with hardware and which with software, or how end-to-end TCP/IP performance is affected by the introduction of a TOE device. In this paper, we propose VOSE (Virtual Offloading with Software Emulation), which is a technique for measuring TCP/IP performance improvements derived from different type of TOE devices without implementing TOE prototypes really. VOSE enables virtual offloading without requiring a hardware TOE device by virtually emulating TOE processing on both source and destination end hosts. For demonstrating the effectiveness of VOSE, we apply VOSE to the TCP checksum and IPsec protocol. We extensively examine the accuracy of virtual offloading with VOSE, by comparing performance (i.e., end-to-end performance and CPU processing overhead) between VOSE and a dedicated TOE device. Moreover, we estimate performance improvement that are derived from several TOE devices of IPsec and combinations of those devices, by applying VOSE to header authenticating and payload encryption in IPsec protocol. Consequently, we show that performance improvements which are derived from TOE devices can be estimated correctly.
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Milanovic, Predrag M., Snezana B. Stankovic, Milada Novakovic, Dragana Grujic, Mirjana Kostic, and Jovana Z. Milanovic. "Development of the automated software and device for determination of wicking in textiles using open-source tools." PLOS ONE 15, no. 11 (November 16, 2020): e0241665. http://dx.doi.org/10.1371/journal.pone.0241665.
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The development of automated software and the device for determination of wicking of textile materials, using open-source ImageJ libraries for image processing, and newly designed additional algorithm for the determination of threshold, is presented in this paper. The description of the device, design of the open-source software “Kapilarko”, as well as an explanation of the steps: image processing, threshold determination and reading of wicking height, are provided. We have also investigated the possibility of using the artificial neural networks for automatic recognition of the wicking height. The results showed that the recognition of the wet area of the sample, based on the application of artificial neural networks was in a very good agreement with the experimental data. The device's utility for the measurement of wicking ability of textile materials was proved by testing various knitted fabrics. The constructed device has the advantages of providing automated measurement and minimization of the subjective errors of the operators; extremely fast or long-term measurements; digital recording of results; consistency of experimental conditions; possibility of using water instead of colors and, last but not least, low cost of the device. Considering the importance and frequent measurements of wicking ability of textile materials, the advantages of the presented device, as well as the fact that commercial software without publishing the source-code, are used for most of the available devices, we believe that our idea to design the automated software and device by applying the "open-source" approach, will be of benefit to scientists and engineers in using or improving wicking experiments.
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Tyagi, Pawan, Christopher Riso, Uzma Amir, Carlos Rojas-Dotti, and Jose Martínez-Lillo. "Exploring room-temperature transport of single-molecule magnet-based molecular spintronics devices using the magnetic tunnel junction as a device platform." RSC Advances 10, no. 22 (2020): 13006–15. http://dx.doi.org/10.1039/c9ra09003g.
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Yanti, Yanti, Sumarni Sumarni, and Nuranita Adiastuty. "PENGEMBANGAN PERANGKAT PEMBELAJARAN PADA MATERI SEGIEMPAT MELALUI PENDEKATAN OPEN-ENDED UNTUK MENINGKATKAN KEMAMPUAN BERPIKIR KREATIF." Jurnal Edukasi dan Sains Matematika (JES-MAT) 5, no. 2 (October 9, 2019): 145. http://dx.doi.org/10.25134/jes-mat.v5i2.2024.
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The study aims to develop learning devices through an open-ended approach in square material. The learning devices developed consist of student modules and lesson plan (RPP). This study is the research, development model of Plomp with consist of three stages: preliminary research phase, prototype phase and assessment phase. Techniques of data collection that used were pretest and posttest questions, questionnaire� of expert validation and questionnaire of student response. The device developed was validated by three validators then conducted a limited trial. From the resulting validation data the average score of student module is 4.33 (valid), the average RPP score is 4.29 (valid). The validator statement against both learning devices developed is usable with little revision and without revision and the student's response to the learning device� was positive (practical). The increase of students ' creative thinking capability of N-Gain of 0.67 with moderate upgrade category. The results of the study were obtained that the device was developed is valid, practical, and can improve creative thinking ablity.
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Mildner, Alexander, Armin Janß, Jasmin Dell’Anna-Pudlik, Paul Merz, Martin Leucker, and Klaus Radermacher. "Device- and service profiles for integrated or systems based on open standards." Current Directions in Biomedical Engineering 1, no. 1 (September 1, 2015): 538–42. http://dx.doi.org/10.1515/cdbme-2015-0128.
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AbstractIntegrated OR systems nowadays are closed and proprietary, so that the interconnection of components from third-party vendors is only possible with high time and cost effort. An integrated operating theatre with open interfaces, giving clinical operators the opportunity to choose individual medical devices from different manufacturers, is currently being developed in the framework of the BMBF (Federal Ministry of Education and Research) funded project OR.NET [1]. Actual standards and concepts regarding technical feasibility and accreditation process do not cope with the requirements for modular integration based on an open standard. Therefore, strategies as well as service and device profiles to enable a procedure for risk management and certifiability are in the focus of the project work. Amongst others, a concept for User Interface Profiles (UI-Profiles) has been conceived in order to describe medical device functions and the entire user interface regarding Human-Machine-Interaction (HMI) characteristics with the aim to identify human-induced risks of central user interfaces. The use of standardized device and service profiles shall allow the manufacturers to integrate their medical devices in the OR.NET network, without disclosing the medical devices’ risk analysis and related confidential knowledge or proprietary information.
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Ferry, D. K., and J. R. Barker. "Open Problems in Quantum Simulation in Ultra-Submicron Devices." VLSI Design 8, no. 1-4 (January 1, 1998): 165–72. http://dx.doi.org/10.1155/1998/20250.
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Quantum transport is becoming more significant as device size shrinks. For example, as device sizes are scaled below 0.1 μm, the number of impurities becomes quite small, so that they are no longer homogeneously distributed throughout the device volume and the carriers are localized into quantum boxes, in that self-energy corrections produced by locally high carrier densities will lead to quantum dot formation. This leads to the need to discuss transport through an array of such quantum structures. Here, we discuss several issues which must be considered in treating the transport through such devices.
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Pereira, Miriam Salles, Liana Monteiro da Fonseca Cardoso, Tatiane Barreto da Silva, Ayla Josma Teixeira, Saul Eliahú Mizrahi, Gabriel Schonwandt Mendes Ferreira, Fabio Moyses Lins Dantas, Vinicius Cotta-de-Almeida, and Luiz Anastacio Alves. "A Low-Cost Open Source Device for Cell Microencapsulation." Materials 13, no. 22 (November 11, 2020): 5090. http://dx.doi.org/10.3390/ma13225090.
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Microencapsulation is a widely studied cell therapy and tissue bioengineering technique, since it is capable of creating an immune-privileged site, protecting encapsulated cells from the host immune system. Several polymers have been tested, but sodium alginate is in widespread use for cell encapsulation applications, due to its low toxicity and easy manipulation. Different cell encapsulation methods have been described in the literature using pressure differences or electrostatic changes with high cost commercial devices (about 30,000 US dollars). Herein, a low-cost device (about 100 US dollars) that can be created by commercial syringes or 3D printer devices has been developed. The capsules, whose diameter is around 500 µm and can decrease or increase according to the pressure applied to the system, is able to maintain cells viable and functional. The hydrogel porosity of the capsule indicates that the immune system is not capable of destroying host cells, demonstrating that new studies can be developed for cell therapy at low cost with microencapsulation production. This device may aid pre-clinical and clinical projects in low- and middle-income countries and is lined up with open source equipment devices.
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Duong, Viet Hoang, and Nam Hoang Nguyen. "Machine learning algorithms for electrical appliances monitoring system using open-source systems." IAES International Journal of Artificial Intelligence (IJ-AI) 11, no. 1 (March 1, 2022): 300. http://dx.doi.org/10.11591/ijai.v11.i1.pp300-309.
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Two main methods to minimize the impact of electricity generation on the environment are to exploit clean fuel resources and use electricity more effectively. In this paper, we aim to change the user's electricity usage by providing feedback about the electrical energy consumed by each device. The authors introduced two devices, load monitoring device (LMD) and activity monitoring device (AMD). The function of the LMD is to provide feedback on the operating status and energy consumption of electrical appliances in a home, which will help people consume electrical energy more efficiently. The parameters of LMD are used to predict the on/off state of each electrical appliance thanks to machine learning algorithms. AMD with audio sensors can assist LMD to distinguish electrical devices with the same or varying power over time. The system was tested for three weeks and achieved a state prediction accuracy of 93.60%.
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John, Dinesh, Qu Tang, Fahd Albinali, and Stephen Intille. "An Open-Source Monitor-Independent Movement Summary for Accelerometer Data Processing." Journal for the Measurement of Physical Behaviour 2, no. 4 (December 1, 2019): 268–81. http://dx.doi.org/10.1123/jmpb.2018-0068.
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Background: Physical behavior researchers using motion sensors often use acceleration summaries to visualize, clean, and interpret data. Such output is dependent on device specifications (e.g., dynamic range, sampling rate) and/or are proprietary, which invalidate cross-study comparison of findings when using different devices. This limits flexibility in selecting devices to measure physical activity, sedentary behavior, and sleep. Purpose: Develop an open-source, universal acceleration summary metric that accounts for discrepancies in raw data among research and consumer devices. Methods: We used signal processing techniques to generate a Monitor-Independent Movement Summary unit (MIMS-unit) optimized to capture normal human motion. Methodological steps included raw signal harmonization to eliminate inter-device variability (e.g., dynamic g-range, sampling rate), bandpass filtering (0.2–5.0 Hz) to eliminate non-human movement, and signal aggregation to reduce data to simplify visualization and summarization. We examined the consistency of MIMS-units using orbital shaker testing on eight accelerometers with varying dynamic range (±2 to ±8 g) and sampling rates (20–100 Hz), and human data (N = 60) from an ActiGraph GT9X. Results: During shaker testing, MIMS-units yielded lower between-device coefficient of variations than proprietary ActiGraph and ENMO acceleration summaries. Unlike the widely used ActiGraph activity counts, MIMS-units were sensitive in detecting subtle wrist movements during sedentary behaviors. Conclusions: Open-source MIMS-units may provide a means to summarize high-resolution raw data in a device-independent manner, thereby increasing standardization of data cleaning and analytical procedures to estimate selected attributes of physical behavior across studies.
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Kong, David S., Todd A. Thorsen, Jonathan Babb, Scott T. Wick, Jeremy J. Gam, Ron Weiss, and Peter A. Carr. "Open-source, community-driven microfluidics with Metafluidics." Nature Biotechnology 35, no. 6 (June 2017): 523–29. http://dx.doi.org/10.1038/nbt.3873.
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Abstract Microfluidic devices have the potential to automate and miniaturize biological experiments, but open-source sharing of device designs has lagged behind sharing of other resources such as software. Synthetic biologists have used microfluidics for DNA assembly, cell-free expression, and cell culture, but a combination of expense, device complexity, and reliance on custom set-ups hampers their widespread adoption. We present Metafluidics, an open-source, community-driven repository that hosts digital design files, assembly specifications, and open-source software to enable users to build, configure, and operate a microfluidic device. We use Metafluidics to share designs and fabrication instructions for both a microfluidic ring-mixer device and a 32-channel tabletop microfluidic controller. This device and controller are applied to build genetic circuits using standard DNA assembly methods including ligation, Gateway, Gibson, and Golden Gate. Metafluidics is intended to enable a broad community of engineers, DIY enthusiasts, and other nontraditional participants with limited fabrication skills to contribute to microfluidic research.
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Febrian, Andika, Yennita, Zuhdi Ma’ruf, and Zulirfan. "Design and Development of E-learning Devices Based on Massive Open Online Course (MOOC) on Static Fluids Material." Journal of Physics: Conference Series 2049, no. 1 (October 1, 2021): 012059. http://dx.doi.org/10.1088/1742-6596/2049/1/012059.
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Abstract E-learning devices based on MOOC is a learning device product that is integrated with a Massive Open Online Course system that is available through a web platform/application provider via Moodle. The learning devices consisting of lesson plans, LKPD, and learning assessments are also equipped with various content and other interesting features. The purpose of this study is to produce a valid and feasible e-learning learning device so that it can be used in physics learning, especially on static fluid material. This learning devices that is integrated with MOOC is expected to make it easier for teachers and students in teaching and learning activities, so that learning continues to be interesting and effective even though online. This type of research is Research and Development (R&D) using a 4D development model. The research instrument used in this study was a learning device validation sheet consisting of lesson plans, student’s worksheet, and learning assessments that were assessed by the validators to assess the feasibility of the product. The data in this study is quantitative data by showing the results of research on the design and development of e-learning devices based on MOOC on static fluids material which is declared valid with a score of 3.46 (high category). Thus the product of this learning device can be declared worthy of being tested or used in physics learning.
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Pitaro, Matteo, Riccardo Pau, Herman Duim, Martijn Mertens, Wouter T. M. Van Gompel, Giuseppe Portale, Laurence Lutsen, and Maria Antonietta Loi. "Tin-lead-metal halide perovskite solar cells with enhanced crystallinity and efficiency by addition of fluorinated long organic cation." Applied Physics Reviews 9, no. 2 (June 2022): 021407. http://dx.doi.org/10.1063/5.0083642.
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Highly performing mixed Sn/Pb-metal halide perovskite solar cells (PSCs) are among the most promising options to reduce Pb content in perovskite devices and enable, owing to their reduced bandgap, the fabrication of all-perovskite tandem solar cells. Whereas pure-Pb perovskite devices exhibit efficiency up to 25.5%, alongside a high open-circuit voltage (≈1.2 V), Sn-Pb PSCs still show lower performances (22.2%) due to higher open-circuit voltage losses. Here, we introduced 2,3,4,5,6-pentafluorophenethylammonium cations in a perovskite active layer of composition (FASnI3)0.5(MAPbI3)0.5 to obtain highly oriented films with improved thermal stability. The treated films exhibit merged grains with no evidence of 2D structures, which could help to reduce the trap state density at the surface and grain boundaries. Solar cells fabricated with the fluorinated cation added to the active layer displayed reduced trap-assisted recombination losses and lower background carrier density, which leads to enhanced open-circuit voltages with respect to the reference samples and the active layers incorporating unfluorinated phenethylammonium cations. The best device reached an efficiency of 19.13%, with an open-circuit voltage of 0.84 V, which is substantially improved with respect to the reference sample showing 17.47% efficiency and 0.77 V open-circuit voltage. More importantly, the fluorinated cations' addition is instrumental to improve the device's thermal stability; 90.3% of the solar cell initial efficiency is maintained after 90 min of thermal stress at 85 °C in a nitrogen atmosphere.
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Anh, Trinh Hien, Trinh Xuan Hung, and Ha Manh Toan. "A Technique to Estimate the Mobile Position and Rotation." INTERNATIONAL JOURNAL OF COMPUTERS & TECHNOLOGY 22 (December 29, 2022): 171–80. http://dx.doi.org/10.24297/ijct.v22i.9335.
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Nowadays, almost all applications, especially augmented reality (AR) applications, run on the web. In these applications, determining the position and rotation of the mobile device is an indispensable basic step. The speed and accuracy of this work greatly affect the quality of the user experience. Therefore, estimating the rotational position of mobile devices on the Web is necessary and meaningful in practice. In this paper, we propose a way to estimate the position and rotation of the mobile device using the image of the marker obtained from the camera combined with the data from the device’s tilt angle sensor. The proposal has been experimentally installed and evaluated for performance onWeb Assembly, Java Script, and C++ platforms. Along with that, to ensure objectivity, we compared the speed and calculation error of the proposed technique with the P3P and PnP techniques installed in the OpenCV open-source library. We also use the proposal method to develop the Virtual Museum application for the Vietnam National Museum of Nature
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Belgrave, Kevin, and Shaun Cardozo. "Thrombus Formation on Amplatzer Septal Occluder Device: Pinning Down the Cause." Case Reports in Cardiology 2014 (2014): 1–2. http://dx.doi.org/10.1155/2014/457850.
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The use of interatrial septal occluder devices is an efficacious and less invasive alternative to open heart surgery for the repair of atrial septal defects. These devices present significant risks including thrombus formation on the device and subsequent thromboembolic events. We present a case of a woman who presented with stroke-like symptoms five years after PFO closure. The patient was subsequently found to have a thrombus on the occluder device. Our case highlights the risk of such thrombolic phenomenon and the risk associated with the device structure as a nidus for such a complication.
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Antwi, Paul. "Device Information for Forensic Analysis." Advances in Multidisciplinary and scientific Research Journal Publication 1, no. 1 (July 26, 2022): 373–78. http://dx.doi.org/10.22624/aims/crp-bk3-p59.
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This document provides an overview of information for forensic analysis related to device name, serial number and model of devices used to connect to social networking platforms. The increasing use of social networking applications on smartphones makes these devices a gold mine for forensic researchers. Potential evidence can be captured on these devices and recovered with the right tools and research methods. The increasing proliferation of network devices in homes and buildings increases the possibilities of finding digital traces relevant to an investigation, physical or virtual: cyber-attacks, identity theft, etc. connected to the network can also find useful traces on the devices themselves found or stored in an associated cloud account that can be identified by device ID, model, and serial number. Keywords: Digital Forensics; Device Information, Evidence, Storage, Cyber forensics framework. BOOK Chapter ǀ Research Nexus in IT, Law, Cyber Security & Forensics. Open Access. Distributed Free Citation: Paul Antwi (2022): Device Information for Forensic Analysis Book Chapter Series on Research Nexus in IT, Law, Cyber Security & Forensics. Pp 373-378 www.isteams.net/ITlawbookchapter2022. dx.doi.org/10.22624/AIMS/CRP-BK3-P59
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Masrat-Un-Nisa, Asloob Ahmad Malik, Khursheed Ahmad Sofi, Arjuma Khatun, and Nahida Yousuf. "Recent Advancements in Vitrification Cryodevices for Gamete and Gonadal Tissue." Cryoletters 43, no. 3 (May 1, 2022): 129–39. http://dx.doi.org/10.54680/fr22310110112.
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Cryopreservation of gametes and gonadal tissue is nowadays primarily accomplished through vitrification. Variables such as cooling rate, viscosity and volume of vitrification solution are critical in gamete vitrification. In addition, sample size and stepwise exposure are also crucial for gonadal tissue vitrification. Recently a class of cryodevices has been developed to reduce the volume of vitrification solution so as to achieve higher cooling rates. Vitrification devices are classified as "open" or "closed" depending on whether the medium comes into direct contact with liquid nitrogen during the process. Examples of the open cryodevices for gamete vitrification are Cryotop, Cryolock, open pulled straw (OPS), etc., and closed devices are Vitrisafe, CryoTip, and high security vitrification kit. Similarly, for tissue vitrification open cryodevices used are needles, cryovials and closed devices used are Cryotissue, ovarian tissue cryosystem, etc. Among all the gamete cryodevices, Cryotop is unique and the best-selling micro-volume storage device. Use of this device has resulted in the highest number of babies born after embryo or oocyte vitrification. Another novel device, Kitasato vitrification system, is a vitrification solution absorber, which is similar to Cryotop but differs in one way, as it possesses a porous membrane that absorbs extra solution from the gamete. This review provides an update on the recent use of cryodevices for gamete and gonadal tissue vitrification.
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Lübbeke, Anne, James A. Smith, Daniel Prieto-Alhambra, and Andrew J. Carr. "The case for an academic discipline of medical device science." EFORT Open Reviews 6, no. 3 (March 2021): 160–63. http://dx.doi.org/10.1302/2058-5241.6.200094.
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Medical devices are a very important but largely under-recognized and fragmented component of healthcare. The limited regulation of the past and the lack of systematic rigorous evaluation of devices leading to numerous high-profile failures will now be replaced by stricter legal requirements and more transparent evaluation processes. This constitutes an unprecedented opportunity, but it also uncovers urgent needs in landscaping, methodology development, and independent comprehensive assessment of device risks and benefits for individual patients and society, especially in the context of increasingly complex devices. We argue that an academic discipline of ‘medical device science’ is well placed to lead and coordinate the efforts necessary to achieve much needed improvement in the medical device sector. Orthopaedics and traumatology could contribute and benefit considerably as one of the medical specialties with the highest use of medical devices. Cite this article: EFORT Open Rev 2021;6:160-163. DOI: 10.1302/2058-5241.6.200094
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Fage-Pedersen, Jacob, Rune Jacobsen, and Martin Kristensen. "Planar glass devices for efficient periodic poling." Optics Express 13, no. 21 (2005): 8514. http://dx.doi.org/10.1364/opex.13.008514.
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Keim, Yansi, Yung Han Yoon, and Umit Karabiyik. "Digital Forensics Analysis of Ubuntu Touch on PinePhone." Electronics 10, no. 3 (February 1, 2021): 343. http://dx.doi.org/10.3390/electronics10030343.
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New smartphones made by small companies enter the technology market everyday. These new devices introduce new challenges for mobile forensic investigators as these devices end up becoming pertinent evidence during an investigation. One such device is the PinePhone from Pine Microsystems (Pine64). These new devices are sometimes also shipped with OSes that are developed by open source communities and are otherwise never seen by investigators. Ubuntu Touch is one of these OSes and is currently being developed for deployment on the PinePhone. There is little research behind both the device and OS on what methodology an investigator should follow to reliably and accurately extract data. This results in potentially flawed methodologies being used before any testing can occur and contributes to the backlog of devices that need to be processed. Therefore, in this paper, the first forensic analysis of the PinePhone device with Ubuntu Touch OS is performed using Autopsy, an open source tool, to establish a framework that can be used to examine and analyze devices running the Ubuntu Touch OS. The findings include analysis of artifacts that could impact user privacy and data security, organization structure of file storage, app storage, OS, etc. Moreover, locations within the device that stores call logs, SMS messages, images, and videos are reported. Interesting findings include forensic artifacts, which could be useful to investigators in understanding user activity and attribution. This research will provide a roadmap to the digital forensic investigators to efficiently and effectively conduct their investigations where they have Ubuntu Touch OS and/or PinePhone as the evidence source.
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Zhao, Yurui, Xiang Wang, Ziyu Lin, and Zhitao Huang. "Multi-Classifier Fusion for Open-Set Specific Emitter Identification." Remote Sensing 14, no. 9 (May 6, 2022): 2226. http://dx.doi.org/10.3390/rs14092226.
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To safeguard the privacy and security of IoT systems, specific emitter identification is utilized to recognize device identity with hardware characteristics. In view of the growing demand for identifying unknown devices, this paper aims to discuss open-set specific emitter identification. We firstly build up a problem formulation for open-set SEI by discussing the working mechanisms of radio signals and open-set recognition. And then it is pointed out that feature coincidence is an intractable challenge in open-set SEI. The reason, accounting for this phenome, is that pretrained fingerprint feature extractors are incapable of clustering unknown device features and differentiating them from known ones. Considering that feature coincidence leads to error recognition of unknown devices, we propose to fuse multi-classifiers in the decision layer to improve accuracy and recall. Three distinct inputs and four different fusion methods are adopted in this paper to implement multi-classifier fusion. The datasets collected at Huanghua Airport demonstrate that the proposed method can avoid the coincidence of feature space and achieve higher accuracy and recall.
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Mlakić, Dragan, Srete Nikolovski, and Emir Alibašić. "Designing Automatic Meter Reading System Using Open Source Hardware and Software." International Journal of Electrical and Computer Engineering (IJECE) 7, no. 6 (December 1, 2017): 3282. http://dx.doi.org/10.11591/ijece.v7i6.pp3282-3291.
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The importance of quality of the measured values is very dependent on the device that measures these values: the size of the sample, the time of measurement, periods of measurement, the mobility and the robustness of the device, etc. Contemporary devices intended for the measurement of physical quantities that are on the market vary in price, as well as and the quality of the measured values. The rule "the more expensive the better" is not necessarily always a rule that is valid because it all depends on the characteristics and capabilities of the device, and the customer’s needs. In this paper, a device based on "Open Source" components of hardware and software will be presented. Device was used to measure voltages and currents on low voltage networks, on which a virtually unlimited number of sensors can be added, and the device is assembled of components available on electronic components Internet.
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Parrilla, Luis, Antonio García, Encarnación Castillo, José Antonio Álvarez-Bermejo, Juan Antonio López-Villanueva, and Uwe Meyer-Baese. "Dracon: An Open-Hardware Based Platform for Single-Chip Low-Cost Reconfigurable IoT Devices." Electronics 11, no. 13 (July 2, 2022): 2080. http://dx.doi.org/10.3390/electronics11132080.
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The development of devices for the Internet of Things (IoT) requires the rapid prototyping of different hardware configurations. In this paper, a modular hardware platform allowing to prototype, test and even implement IoT appliances on low-cost reconfigurable devices is presented. The proposed platform, named Dracon, includes a Z80-clone microprocessor, up to 64 KB of RAM, and 256 inputs/outputs (I/Os). These I/Os can be used to connect additional co-processors within the same FPGA, external co-processors, communications modules, sensors and actuators. Dracon also includes as default peripherals a UART for programming and accessing the microprocessor, a Real Time Clock, and an Interrupt Timer. The use of an 8-bit microprocessor allows the use of the internal memory of the reconfigurable device as program memory, thereby, enabling the implementation of a complete IoT device within a single low-cost chip. Indeed, results using a Spartan 7 FPGA show that it is possible to implement Dracon with only 1515 6-input LUTs while operating at a maximum frequency of 80 MHz, which results in a better trade-off in terms of area and performance than other less powerful and less versatile alternatives in the literature. Moreover, the presented platform allows the development of embedded software applications independently of the selected FPGA device, enabling rapid prototyping and implementations on devices from different manufacturers.
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Das, Nayan C., Minjae Kim, Dong-uk Kwak, Jarnardhanan R. Rani, Sung-Min Hong, and Jae-Hyung Jang. "Effects of the Operating Ambiance and Active Layer Treatments on the Performance of Magnesium Fluoride Based Bipolar RRAM." Nanomaterials 12, no. 4 (February 11, 2022): 605. http://dx.doi.org/10.3390/nano12040605.
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This study investigates switching characteristics of the magnesium fluoride (MgFx)-based bipolar resistive random-access memory (RRAM) devices at different operating ambiances (open-air and vacuum). Operating ambiances alter the elemental composition of the amorphous MgFx active layer and Ti/MgFx interface region, which affects the overall device performance. The experimental results indicate that filament type resistive switching takes place at the interface of Ti/MgFx and trap-controlled space charge limited conduction (SCLC) mechanisms is dominant in both the low and high resistance states in the bulk MgFx layer. RRAM device performances at different operating ambiances are also altered by MgFx active layer treatments (air exposure and annealing). Devices show the better uniformity, stability, and a higher on/off current ratio in vacuum compared to an open-air environment. The Ti/MgFx/Pt memory devices have great potential for future vacuum electronic applications.
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Sandoval, Elena, Alejandro Fernández-Cisneros, and Daniel Pereda. "Minimally invasive single-incision temporary biventricular assist device." Asian Cardiovascular and Thoracic Annals 28, no. 9 (August 16, 2020): 604–6. http://dx.doi.org/10.1177/0218492320951014.
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New short-term devices have been developed to allow percutaneous insertion. However, in some cases, open insertion becomes necessary. Less invasive insertion of short-term devices has been described previously, using two incisions. We present the case of a patient who underwent minimally invasive insertion of a biventricular device, using a single incision.
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Kossivakis, D., and Clio G. Vossou. "Computational Modeling of a Commercial Seebeck Module." Key Engineering Materials 605 (April 2014): 645–48. http://dx.doi.org/10.4028/www.scientific.net/kem.605.645.
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This paper investigates computationally the performance of a commercially available Seebeck module under open circuit conditions. Seebeck modules, also called thermoelectric generators, are solid state devices used for power generation purposes. One of the most attractive applications of these devices is the exploitation of waste heat vastly available through various environmental or industrial sources. A Seebeck module can be used as a stand-alone device or as a part of a bigger power generation system. Device computational modeling has been performed using ANSYS Workbench (v. 14.0).
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Huang, Chih-Yuan, and Hsin-Hsien Chen. "An Automatic Embedded Device Registration Procedure Based on the OGC SensorThings API." Sensors 19, no. 3 (January 25, 2019): 495. http://dx.doi.org/10.3390/s19030495.
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Sensor Web and Internet of Things (IoT) (SW-IoT) have been attracting attention from various fields. Both of them deploy networks of embedded devices to monitor physical properties (i.e., sensing capability) or to be controlled (i.e., tasking capability). One of the most important tasks to realize the SW-IoT vision is to establish an open and interoperable architecture, across the device layer, gateway layer, service layer, and application layer. To achieve this objective, many organizations and alliances propose standards for different layers. Among the standards, Open Geospatial Consortium (OGC) SensorThings API is arguably one of the most complete and flexible service standards. However, the SensorThings API only address heterogeneity issues in the service layer. Embedded devices following proprietary protocols need to join closed ecosystems and then link to the SensorThings API ecosystem via customized connectors. To address this issue, one could first follow another device layer and gateway layer open standards and then perform data model mapping with the SensorThings API. However, the data model mapping is not always straightforward as the standards were designed independently. Therefore, this research tries to propose a more direct solution to unify the entire SW-IoT architecture by extending the SensorThings API ecosystem to the gateway layer and the device layer. To be specific, this research proposes SW-IoT Plug and Play (IoT-PNP) to achieve an automatic registration procedure for embedded devices. The IoT-PNP contains three main components: (1) A description file describing device metadata and capabilities, (2) a communication protocol between the gateway layer and the device layer for establishing connections, and (3) an automatic registration procedure for both sensing and tasking capabilities. Overall, we believe the proposed solution could help achieve an open and interoperable SW-IoT end-to-end architecture based on the OGC SensorThings API.
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Srither, S. R., N. R. Dhineshbabu, D. S. Shankar Rao, S. Krishna Prasad, Oscar Dahlsten, and Suryasarathi Bose. "Transparent Triboelectric Nanogenerator Based on Thermoplastic Polyurethane Films." Journal of Nanoscience and Nanotechnology 21, no. 5 (May 1, 2021): 3072–80. http://dx.doi.org/10.1166/jnn.2021.19143.
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This study aims at investigating flexible and transparent thermoplastic polyurethane (TPU) as a novel material for triboelectric nanogenerator (TENG) devices with a polyethylene terephthalate layer. Devices having TPU—either as a flat film or as electrospun micrometer-dimension fibers with varying concentrations of TPU—were tested. The best output performing device provided 21.4 V and 23 μA as open-circuit voltage and short-circuit current respectively, with the application of a small force of 0.33 N indicating the high efficiency of the device. Devices with flat films-obtained using the doctor-blade (DB) technique—have high transparency (80%) as well as high TENG output. The topography of the TPU layer, characterized by atomic force microscopy, reveals nanoscale roughness of the film surface. Finally, we demonstrate that gentle hand tapping on the TENG device can power upto 11 light-emitting diodes (LEDs). The high transparency, lightweight, simple fabrication, flexibility, and robust features of such device make it an added value for various optoelectronic applications.
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Chien, Tzu-I., Huey-Wen Liang, Ya-Fen Lee, Fei-Yun Liu, Chi-Kwang Hsu, Shao-Tseng Liu, Mo Siu-Mei Lee, and Pin-Fei Wei. "Evaluation of Newly Developed Easy-Open Assistive Devices for Pneumatic Tube System Carriers for the Reduction of Work-Related Musculoskeletal Disorders." BioMed Research International 2021 (January 8, 2021): 1–12. http://dx.doi.org/10.1155/2021/8853602.
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Musculoskeletal disorders may affect labor efficiency, cause disability, impair one’s work ability, and lower one’s quality of life. This consequently leads to a larger expenditure of medical resources. We aimed to design easy-to-open assistive devices for pneumatic tube systems to improve ergonomics and reduce musculoskeletal complaints of workers. We followed a design control process, including designs of motors, gears, sensors, and V-shaped connecting rods. Efficacy was evaluated by examining risks based on job strain index, user satisfaction, and musculoskeletal complaints of operators before and after the system’s implementation on a Nordic musculoskeletal questionnaire. We designed three assistive devices: two semiautomatic and one automatic. Each semiautomatic device costs about 300 US dollars and required space of 10 × 18 × 38 c m 3 . The automatic device costs about 3000 US dollars and required space of 28 × 38 × 50 c m 3 . The job strain index score decreased from 36 (very high risk) to 3 (low risk) with the semiautomatic devices and to 0 with the automatic device. Musculoskeletal complaints in the neck and upper limbs were reduced, with a significantly higher satisfaction rate for female operators. Our novel design of an automatic cap opening device for a pneumatic tube system was effective in improving ergonomics and reducing musculoskeletal complaints.
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Yang, Jingjuan, Jinlei Wei, Bin Liao, Baoan Bian, Guoliang Wang, Xu Zhang, Xianying Wu, Jun Luo, and Lin Chen. "Electronic transport induced by doping on the electrodes in molecular devices." Journal of Theoretical and Computational Chemistry 19, no. 08 (September 29, 2020): 2050030. http://dx.doi.org/10.1142/s0219633620500303.
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The electronic transport properties of molecular device based on photochromic diarylethene with carbon nanotube electrode are investigated by density functional theory and non-equilibrium Green’s function. The devices with open and closed configurations show a switching effect. It is found that doping of different amounts of nitrogen atoms on left electrodes results in different electronic transport properties. In addition, we discuss the observed oscillation of current in the devices induced by doping using transmission eigenstates and transmission spectra of the device. The local density of states of the device is calculated to analyze the observed rectifying behavior. The results suggest that doping of nitrogen atoms on the left electrode can be considered as a factor to modulate the electronic transport properties of molecular device.
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Neinstein, Aaron, Jenise Wong, Howard Look, Brandon Arbiter, Kent Quirk, Steve McCanne, Yao Sun, Michael Blum, and Saleh Adi. "A case study in open source innovation: developing the Tidepool Platform for interoperability in type 1 diabetes management." Journal of the American Medical Informatics Association 23, no. 2 (September 2, 2015): 324–32. http://dx.doi.org/10.1093/jamia/ocv104.
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Abstract Objective Develop a device-agnostic cloud platform to host diabetes device data and catalyze an ecosystem of software innovation for type 1 diabetes (T1D) management. Materials and Methods An interdisciplinary team decided to establish a nonprofit company, Tidepool, and build open-source software. Results Through a user-centered design process, the authors created a software platform, the Tidepool Platform, to upload and host T1D device data in an integrated, device-agnostic fashion, as well as an application (“app”), Blip, to visualize the data. Tidepool’s software utilizes the principles of modular components, modern web design including REST APIs and JavaScript, cloud computing, agile development methodology, and robust privacy and security. Discussion By consolidating the currently scattered and siloed T1D device data ecosystem into one open platform, Tidepool can improve access to the data and enable new possibilities and efficiencies in T1D clinical care and research. The Tidepool Platform decouples diabetes apps from diabetes devices, allowing software developers to build innovative apps without requiring them to design a unique back-end (e.g., database and security) or unique ways of ingesting device data. It allows people with T1D to choose to use any preferred app regardless of which device(s) they use. Conclusion The authors believe that the Tidepool Platform can solve two current problems in the T1D device landscape: 1) limited access to T1D device data and 2) poor interoperability of data from different devices. If proven effective, Tidepool’s open source, cloud model for health data interoperability is applicable to other healthcare use cases.
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Morgan, Michael, John J. Moruzzi, David R. Allanson, and Xun Chen. "On the Development of Machine Controller Systems with Enhanced Facility for Process Monitoring Integration." Key Engineering Materials 581 (October 2013): 533–38. http://dx.doi.org/10.4028/www.scientific.net/kem.581.533.
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This paper reports on the progress achieved with the specification and development of a flexible, innovative open-architecture grinding machine control system. The aim is to unify the design and implementation of key machine tool features such as hardware configuration parameters, operational parameters, process variables and machining cycles into a rationalized, extendable, object-oriented framework. The application is PC/Windows based and developed in Visual Studio .NET software. The control design is extendable to surface as well as cylindrical grinding operations and cycles. It was intended from the outset to allow simpler integration of 3rd party sensor-based process monitoring equipment to facilitate optimised machining, including Adaptive or Intelligent control techniques. These peripheral devices from different suppliers must be analysed and classified depending on specific functionality, and a common programming and operating interface presented to the developer and user. Other device types on the machine such as operator panels and motion /axis control hardware have been identified and incorporated. An Open Device Interface (ODI) framework is proposed and defined: the development of this generic software structure and associated libraries masks specific underlying details of a devices implementation and allows simpler incorporation of additional features to the machine. The requirements for the transmission, handling, display and logging of process data is presented, and the successful demonstration of the new system on a universal grinding machine with sample peripheral devices is reported. The applicability of the Open Device Interface structure to other generalised control devices and monitoring applications is also discussed.
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Sheahan, Guy, Richard Reznick, Don Klinger, Leslie Flynn, and Boris Zevin. "Comparison of Personal Video Technology for Teaching and Assessment of Surgical Skills." Journal of Graduate Medical Education 11, no. 3 (June 1, 2019): 328–31. http://dx.doi.org/10.4300/jgme-d-18-01082.1.
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ABSTRACT Background Improvements in personal technology have made video recording for teaching and assessment of surgical skills possible. Objective This study compared 5 personal video-recording devices based on their utility (image quality, hardware, mounting options, and accessibility) in recording open surgical procedures. Methods Open procedures in a simulated setting were recorded using smartphones and tablets (MOB), laptops (LAP), sports cameras such as GoPro (SC), single-lens reflex cameras (DSLR), and spy camera glasses (SPY). Utility was rated by consensus between 2 investigators trained in observation of technology using a 5-point Likert scale (1, poor, to 5, excellent). Results A total of 150 hours of muted video were reviewed with a minimum 1 hour for each device. Image quality was good (3.8) across all devices, although this was influenced by the device-mounting requirements (4.2) and its proximity to the area of interest. Device hardware (battery life and storage capacity) was problematic for long procedures (3.8). Availability of devices was high (4.2). Conclusions Personal video-recording technology can be used for assessment and teaching of open surgical skills. DSLR and SC provide the best images. DSLR provides the best zoom capability from an offset position, while SC can be placed closer to the operative field without impairing sterility. Laptops provide best overall utility for long procedures due to video file size. All devices require stable recording platforms (eg, bench space, dedicated mounting accessories). Head harnesses (SC, SPY) provide opportunities for “point-of-view” recordings. MOB and LAP can be used for multiple concurrent recordings.
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Sierra, Manuela, Salín Pereira, Juan Felipe Isaza, Iván Darío Montoya, Christian Andrés Diaz, Diego Velásquez, and Carolina Londoño. "DEVELOPMENT OF OPEN ABDOMEN DEVICE BASED ON BIODESIGN METHODOLOGY." Proceedings of the Design Society 1 (July 27, 2021): 1253–62. http://dx.doi.org/10.1017/pds.2021.125.
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AbstractOpen Abdomen (OA) therapy, is purposely leaving the fascial edges of the abdomen un-approximated after a laparotomy. During the OA therapy, there must be a temporary abdominal closure (TAC) device installed in the patient to achieve abdominal closure gradually without affecting its safety. However, the actual TAC devices have some gaps in terms of functionality or usability, therefore a new device is proposed. Intending to design a usable and functional technique for patients all over the world, the BioDesign Innovation Process was used. This iterative methodology focuses on healthcare needs, invention, and concept development with three main phases: Identify, Invent and Implement. At the end of these phases, the team successfully developed two new abdominal closure techniques that fill in the gaps of functionality and usability, using a simulator that realistically mimicked the physical and mechanical properties of an open abdomen. In terms of functionality, the novel techniques showed safe installation, operational security, secure grip, low invasiveness and control of intra-abdominal pressure. In terms of usability, the devices showed better results in efficiency, effectiveness and easy re-exploration than the control group.
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Hubert, Terrence L., Rolf Lindemann, Jichuan Wu, Catherine Agnew, Thomas H. Shaffer, and Marla R. Wolfson. "Prototype Hybrid Systems for Neonatal Warming: In Vitro Comparisons to Standard of Care Devices." Biomedical Instrumentation & Technology 44, no. 6 (November 1, 2010): 523–27. http://dx.doi.org/10.2345/0899-8205-44.6.523.
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Abstract Preterm infants lack necessary thermoregulation. An ideal incubator should maintain a uniform and constant thermal environment. We compared the effectiveness of a supplemental heating blanket to improve the heating characteristics of two different incubator warming devices using assessment of their respective function alone as controls. Device A and device B, with and without a heating blanket (Harvard Apparatus), were instrumented with a distribution matrix of multiple temperature (n = 11) and humidity probes. These data were serially measured during warm up to 37.5 °C and through a series of open-door perturbations. The time constant, temperature variation, and change in air temperature were calculated. Data were analyzed for significance by 2-factor ANOVA for each respective incubator either turned on or off with either the heating blanket turned on or off. Device A warms faster (33.87% ; p < 0.05) than device B, but has a greater (37.27% ; p < 0.05) temperature variation during warmup. The heating blanket enhances the thermal response of device A during warmup, but does not alter those of device B. With the side door open, device A shows a smaller (−16.5% ; p < 0.05) temperature variation than device B; the heating blanket attenuates the temperature change in both devices. These results demonstrate that the use of a supplemental heating blanket, as well as device-related differences, may impact clinical control of a thermal environment.
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Jing, Zhi Sheng, Yun Liu, and Shan Chao Tu. "A Certain Type of Artillery Open Loop Servo System Reform Research Allocation Zoom Multiples." Applied Mechanics and Materials 599-601 (August 2014): 669–72. http://dx.doi.org/10.4028/www.scientific.net/amm.599-601.669.
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For mobile devices with existing servo repair problems encountered. Eager to achieve functional replacement of the existing servo device through the use of new technologies. Mechatronic transformation active servo control device artillery, with a small technical risk, less funding, renovation cycle is short, etc., can form new parts supply capacity, which can increase the active duty army air defense artillery maintenance support capability, to extend the service life of the same model.
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D’Urso, Provvidenza Rita, Claudia Arcidiacono, and Giovanni Cascone. "Assessment of a Low-Cost Portable Device for Gas Concentration Monitoring in Livestock Housing." Agronomy 13, no. 1 (December 20, 2022): 5. http://dx.doi.org/10.3390/agronomy13010005.
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The increasing regulatory pressure to monitor and reduce GHG emissions and air pollutants requires cost-effective methods for their surveillance. The most common techniques used for scientific investigations into gas concentration monitoring in barns are accurate but expensive and require complex maintenance. This research study analyzed the potential use of low-cost portable measurement devices for the measurement of ammonia (NH3) and carbon dioxide (CO2) concentrations in an open dairy barn. A comparison between the gas concentrations acquired at different heights from the floor by using portable devices and those acquired by a photoacoustic infrared multigas spectroscope (i.e., reference measurement) in the same sampling locations was carried out to determine the precision of the low-cost portable devices. The performances of the low-cost portable devices were statistically analyzed by application of the one-way analysis of variance, correlation analysis, and regression analysis. The results showed a significant difference between the gas concentration values at various heights from the floor for both NH3 and CO2. The correlations between the concentrations acquired by the low-cost portable devices and the INNOVA were statistically significant (r = 0.83; p < 0.001) for gas concentrations monitored at 0.4 m from the floor. Compared with the reference measurement device, the low-cost devices were effective at the monitoring of NH3 concentrations at 0.40 m from the floor; however, they underestimated the concentrations in the barn at increasing heights from the floor, and the device was not adequate for CO2 concentrations. In detail, the relative measurement error of the low-cost devices compared to the INNOVA was reduced close to the floor during NH3 concentration measurements. Within these limitations, this device may be useful for monitoring the NH3 concentration in the barn and assessing variations in the NH3 concentrations mainly related to the animal occupied zone. Further efforts are needed in this field of research to identify a low-cost device that can simplify emission estimation from open dairy barns.
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Chang, Yi-Chun, Jian-Wei Li, and Jing-Hong Lv. "An IP Multimedia Subsystem Services Proxy Gateway Based on a JAVA Dynamic Module System." Applied Sciences 8, no. 11 (October 25, 2018): 2060. http://dx.doi.org/10.3390/app8112060.
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By virtue of the rapid development of the Information and Communication Technology (ICT), people have owned various devices connected to the Internet to enjoy various emerging application services, such as multimedia related services. IP Multimedia Subsystem (IMS) is the integration platform for multimedia application services and provides a rich feature set of converged services in the Next Generation Network (NGN). IMS services are accessed by a user anytime and anywhere through his/her personal self IMS device, e.g., mobile device, equipped with a Universal Subscriber Identity Module (USIM) card. People have owned various devices connected to the Internet at homes or offices. However, some devices can not access IMS services without USIM cards embedded, which is called non-IMS devices. People wish that more devices without USIM cards embedded should be connected to the Internet on which IMS services are accessed in addition to the mobile devices equipped with USIM cards. Accordingly, we propose an Open Service Gateway Initiative (OSGi)-based IMS service gateway, in which OSGi technology is the dynamic module system for JAVA. The proposed gateway is authorized by a personal self IMS device such that IMS services are accessed by non-IMS devices, in this paper. Moreover, these non-IMS devices rely on different networks to access technologies and network protocols and the IMS service gateway proposed here adopts the OSGi framework for no problem of integration.
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Tsai, Hsinhan, Reza Asadpour, Jean-Christophe Blancon, Constantinos C. Stoumpos, Olivier Durand, Joseph W. Strzalka, Bo Chen, et al. "Light-induced lattice expansion leads to high-efficiency perovskite solar cells." Science 360, no. 6384 (April 5, 2018): 67–70. http://dx.doi.org/10.1126/science.aap8671.
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Light-induced structural dynamics plays a vital role in the physical properties, device performance, and stability of hybrid perovskite–based optoelectronic devices. We report that continuous light illumination leads to a uniform lattice expansion in hybrid perovskite thin films, which is critical for obtaining high-efficiency photovoltaic devices. Correlated, in situ structural and device characterizations reveal that light-induced lattice expansion benefits the performances of a mixed-cation pure-halide planar device, boosting the power conversion efficiency from 18.5 to 20.5%. The lattice expansion leads to the relaxation of local lattice strain, which lowers the energetic barriers at the perovskite-contact interfaces, thus improving the open circuit voltage and fill factor. The light-induced lattice expansion did not compromise the stability of these high-efficiency photovoltaic devices under continuous operation at full-spectrum 1-sun (100 milliwatts per square centimeter) illumination for more than 1500 hours.
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FREEMAN, G. G., B. JAGANNATHAN, N. ZAMDMER, R. GROVES, R. SINGH, Y. TRETIAKOV, M. KUMAR, et al. "INTEGRATED SiGe AND Si DEVICE CAPABILITIES AND TRENDS FOR MULTI-GIGAHERTZ APPLICATIONS." International Journal of High Speed Electronics and Systems 13, no. 01 (March 2003): 175–219. http://dx.doi.org/10.1142/s0129156403001570.
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Silicon-based devices, including the increasingly available SiGe-based devices, are now demonstrating fT and fMAX values over 200 GHz. These recent advances open the door to a wide range of silicon-based very high frequency, low power and highly integrated solutions. Trends in silicon MOS, SiGe HBT, SiGe MODFET and SiGe strained silicon FETs are reported. Silicon inroads to device functions viewed as the sole realm of III-V technologies are also being demonstrated. Capability and trends of the integrated silicon photodiode are reported here as an example. Integration of these high-speed devices into a complex circuit requires on-chip passive device functionality at such high frequency. Key devices to enable integration are the inductor, varactor, and transmission line, and operation of these devices at high frequency is reported. Further, we discuss noise isolation issues and techniques, which may be used when minimizing cross-talk within a conductive silicon substrate.
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Morton, PG. "The pacemaker and defibrillator codes: implications for critical care nursing." Critical Care Nurse 17, no. 1 (February 1, 1997): 50–59. http://dx.doi.org/10.4037/ccn1997.17.1.50.
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Scientific advances in the past few decades have resulted in the development of complex devices capable of treating both brady-dysrhythmias and tachydysrhythmias. Because critical care nurses play a vital role in the safe and effective functioning of these devices, they must understand the operation of the devices and patients' physiological and psychosocial responses to the technology. Careful monitoring, open and caring communication, and relevant patient education will make the important difference in patients' adjustment to use of an antidysrhythmic device.
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Zhang, Hui, and Hong Hua Wang. "The Design of Automatic Remote Monitoring System for the Temperature and Humidity Based on GPRS." Applied Mechanics and Materials 599-601 (August 2014): 1102–5. http://dx.doi.org/10.4028/www.scientific.net/amm.599-601.1102.
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This paper tries to solve is how to design the four products (food, medicine, and health care products, cosmetics, medical devices) and transmission device and control system of temperature and humidity automatic acquisition of remote monitoring system, so as to solve the existing warehouse temperature and humidity monitoring devices commonly used in single type, stability is not high, poor, convenient the open problem of the poor.
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Parks, Joseph W., and Kevin F. Brennan. "Boundary Condition for the Modeling of Open-circuited Devices in Non-equilibrium." VLSI Design 8, no. 1-4 (January 1, 1998): 567–72. http://dx.doi.org/10.1155/1998/71381.
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A boundary condition specifically designed to model open-circuited devices in a macroscopic device simulator is introduced. Other simulation techniques have relied on an external circuit model to regulate the current flow out of a contact thus allowing the potential to remain the controlled variable at the boundary. The limitations of these methods become apparent when modeling open-circuited devices with an exceptionally small or zero output current. In this case, using a standard ohmic-type Dirichlet boundary condition would not yield satisfactory results and attaching the device to an arbitrarily large load resistance is physically and numerically unacceptable. This proposed condition is a true current controlled boundary where the external current is the specified parameter rather than the potential. Using this model, the external current is disseminated into electron and hole components relative to their respective concentration densities at the contact. This model also allows for the inclusion of trapped interface charge and a finite surface recombination velocity at the contact. An example of the use of this boundary condition is performed by modeling a silicon avalanche photodiode operating in the flux integrating mode for use in an imaging system. In this example, the device is biased in steady-state to just below the breakdown voltage and then open-circuited. The recovery of the isolated photodiode back to its equilibrium condition is then determined by the generation lifetime of the material, the quantity of signal and background radiation incident upon the device, and the impact ionization rates.
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Potier, Louis, Maud François, Dured Dardari, Marilyne Feron, Narimene Belhatem, Estelle Nobecourt-Dupuy, Manuel Dolz, et al. "Comparison of a new versus standard removable offloading device in patients with neuropathic diabetic foot ulcers: a French national, multicentre, open-label randomized, controlled trial." BMJ Open Diabetes Research & Care 8, no. 1 (May 2020): e000954. http://dx.doi.org/10.1136/bmjdrc-2019-000954.
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IntroductionThe offloading is crucial to heal neuropathic diabetic foot ulcer (DFU). Removable offloading are the most used devices. Orthèse diabète is a new customized removable knee-high offloading device immobilizing foot and ankle joints, with some specific and innovative features that may improve offloading. We aimed to evaluate the efficiency of this device in DFU healing.Research, design and methodsThe evaluation of Offloading using a new removable ORTHOsis in DIABetic foot study is a French multicenter (13 centers) randomized controlled trial with blinded end points evaluation. Adults with neuropathic DFU were randomly assigned to either Orthèse Diabète (experimental device), or any type of conventional (usually used in France) removable offloading devices (control group). The primary outcome was the 3-month proportion of patients with fully healed DFU.ResultsAmong 112 randomized patients (men 78%, age 62±10 years), the primary outcome occurred in 19 (33%) participants using conventional device vs 19 (35%) Orthèse Diabète users (p=0.79). Study groups were also comparable in terms of prespecified secondary end points including occurrence of new DFU (25% vs 27% in conventional and experimental groups), ipsilateral lower-limb amputation (4% vs 10%) or infectious complications (14% vs 13%) (p>0.05 for all). Adverse events were comparable between groups, including 4 deaths unrelated to study allocation (1 sudden death, 2 ventricular arrhythmias and 1 pancreatic cancer). Adverse events believed to be related to the device were higher in the Orthèse Diabète group than in the control group (15% vs 4%). Orthèse Diabète was less frequently worn than conventional devices (46% vs 66%, p=0.04).ConclusionsOrthèse Diabète, a new removable offloading orthosis immobilizing foot and ankle joints did not show superiority compared with conventional removable devices in neuropathic DFU healing and cannot be recommended to heal DFU.Trial registration numberNCT01956162.
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Chen, B. J., X. W. Sun, and S. C. Tan. "Transparent organic light-emitting devices with LiF/Mg:Ag cathode." Optics Express 13, no. 3 (February 7, 2005): 937. http://dx.doi.org/10.1364/opex.13.000937.
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