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Artykuły w czasopismach na temat „Compression”

Autor: Grafiati

Data publikacji: 4 czerwca 2021

Data aktualizacji: 9 czerwca 2025

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GROSU-BULARDA, Andreea, Razvan Nicolae TEODOREANU, Andra-Luana LAZARESCU, Marius POPESCU, Florin-Vlad HODEA, Flavia Francesca LITA, Alexandru STOIAN, Cristian VANCEA, Liviu Petre COJOCARU, and Ioan LASCAR. "Nerve compression due to benign tumors or ganglion cysts in the upper limb – case series." Romanian Journal of Medical Practice 16, no. 4 (December 31, 2021): 501–8. http://dx.doi.org/10.37897/rjmp.2021.4.19.

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Tumor nerve compressions in the upper limb are relatively rare, usually involving ganglion cysts and benign tumors. We present a case series of five patients with peripheral nerve compression in the upper limb due to tumor or cystic masses- ulnar nerve compression in the Guyon’s tunnel due to a ganglion cyst, large median nerve schwannoma compressing anterior interosseous nerve and median nerve, voluminous lipoma compressing median nerve in the proximal forearm, superficial branch of radial nerve compression by a synovial cyst and elbow region lipoma compressing radial nerve. In the beginning,

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Ma, Wei Hua, and Hong Zhen Kang. "Experimental Study on Compressive Behavior of CFRP Confined Concrete Columns." Advanced Materials Research 446-449 (January 2012): 3725–29. http://dx.doi.org/10.4028/www.scientific.net/amr.446-449.3725.

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Compressive tests of 30 concrete column specimens with three concrete strength grades are carried out in this paper to study ultimate compressive strength of specimens. The specimens are divided into three groups, that is, unconfined, confined by CFRP with no initial compression and confined by CFRP with various initial compressions. The different initial compressions’ influence on ultimate stresses and strains are investigated. The decrease of CFRP reinforcing effect due to pre-compression are analyzed. The research results provide experimental datum for reinforced design of existing concrete

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Isechi, Kohei. "Light Field Compression for Compressive 3D Display." International Journal of Machine Learning and Computing 9, no. 2 (April 2019): 208–12. http://dx.doi.org/10.18178/ijmlc.2019.9.2.788.

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Ko, Yousun, Alex Chadwick, Daniel Bates, and Robert Mullins. "Lane Compression." ACM Transactions on Embedded Computing Systems 20, no. 2 (March 2021): 1–26. http://dx.doi.org/10.1145/3431815.

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This article presents Lane Compression, a lightweight lossless compression technique for machine learning that is based on a detailed study of the statistical properties of machine learning data. The proposed technique profiles machine learning data gathered ahead of run-time and partitions values bit-wise into different lanes with more distinctive statistical characteristics. Then the most appropriate compression technique is chosen for each lane out of a small number of low-cost compression techniques. Lane Compression’s compute and memory requirements are very low and yet it achieves a comp

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P, Srividya. "Optimization of Lossless Compression Algorithms using Multithreading." Journal of Information Technology and Sciences 9, no. 1 (March 2, 2023): 36–42. http://dx.doi.org/10.46610/joits.2022.v09i01.005.

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The process of reducing the number of bits required to characterize data is referred to as compression. The advantages of compression include a reduction in the time taken to transfer data from one point to another, and a reduction in the cost required for the storage space and network bandwidth. There are two types of compression algorithms namely lossy compression algorithm and lossless compression algorithm. Lossy algorithms find utility in compressing audio and video signals whereas lossless algorithms are used in compressing text messages. The advent of the internet and its worldwide usag

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P, Srividya. "Optimization of Lossless Compression Algorithms using Multithreading." Journal of Information Technology and Sciences 9, no. 1 (March 1, 2023): 36–42. http://dx.doi.org/10.46610/joits.2023.v09i01.005.

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The process of reducing the number of bits required to characterize data is referred to as compression. The advantages of compression include a reduction in the time taken to transfer data from one point to another, and a reduction in the cost required for the storage space and network bandwidth. There are two types of compression algorithms namely lossy compression algorithm and lossless compression algorithm. Lossy algorithms find utility in compressing audio and video signals whereas lossless algorithms are used in compressing text messages. The advent of the internet and its worldwide usag

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Guerra, Aníbal, Jaime Lotero, José Édinson Aedo, and Sebastián Isaza. "Tackling the Challenges of FASTQ Referential Compression." Bioinformatics and Biology Insights 13 (January 2019): 117793221882137. http://dx.doi.org/10.1177/1177932218821373.

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The exponential growth of genomic data has recently motivated the development of compression algorithms to tackle the storage capacity limitations in bioinformatics centers. Referential compressors could theoretically achieve a much higher compression than their non-referential counterparts; however, the latest tools have not been able to harness such potential yet. To reach such goal, an efficient encoding model to represent the differences between the input and the reference is needed. In this article, we introduce a novel approach for referential compression of FASTQ files. The core of our

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Wang, Hong Yun, and Hui Qiang Zheng. "Shear and Squeeze Rheometry of Magnetorheological Fluids." Advanced Materials Research 305 (July 2011): 344–47. http://dx.doi.org/10.4028/www.scientific.net/amr.305.344.

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The mechanical properties of a magnetorheological (MR) fluid in shearing, compression and shearing after compression have been studied in the magnetic field which is generated by a coil carrying different magnitudes of DC electrical current on a self-constructed test system. The relations of compression stress versus compression strain, yield stress versus compression stress were studied under different magnetic fields. The compressing tests showed that the MR fluid is very stiff at small compressive strains lower than 0.13. The shear yield stress of MR fluids after compression was much strong

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Yedukondalu, G., Sajjan Patnaik, P. Lakshmi Venkatesh, and S. Siva Jagadeesh. "Chest compression with 2-DOF parallel manipulator for cardiopulmonary resuscitation." International Journal of Engineering & Technology 7, no. 2.8 (March 19, 2018): 211. http://dx.doi.org/10.14419/ijet.v7i2.8.10411.

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Chest compression process is used for recovering patients who met with a cardiac arrest in emergency situations. Chest compression is the only possibility of rescuing patients during cardiopulmonary resuscitation (CPR). It is hard to achieve the exact chest compression’s depth and rate even by experienced professionals as per the CPR guideline. A 2-DOF 2-RRR translational parallel manipulator was designed for delivering chest compressions. The kinematic analysis is carried out analytically.The workspace of the manipulator is examined in consideration of physical constraints imposed by joints.

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Mishra, Amit Kumar. "Versatile Video Coding (VVC) Standard: Overview and Applications." Turkish Journal of Computer and Mathematics Education (TURCOMAT) 10, no. 2 (September 10, 2019): 975–81. http://dx.doi.org/10.17762/turcomat.v10i2.13578.

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Information security includes picture and video compression and encryption since compressed data is more secure than uncompressed imagery. Another point is that handling data of smaller sizes is simple. Therefore, efficient, secure, and simple data transport methods are created through effective data compression technology. Consequently, there are two different sorts of compression algorithm techniques: lossy compressions and lossless compressions. Any type of data format, including text, audio, video, and picture files, may leverage these technologies. In this procedure, the Least Significant

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Eldstål-Ahrens, Albin, Angelos Arelakis, and Ioannis Sourdis. "L ² C: Combining Lossy and Lossless Compression on Memory and I/O." ACM Transactions on Embedded Computing Systems 21, no. 1 (January 31, 2022): 1–27. http://dx.doi.org/10.1145/3481641.

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In this article, we introduce L 2 C, a hybrid lossy/lossless compression scheme applicable both to the memory subsystem and I/O traffic of a processor chip. L 2 C employs general-purpose lossless compression and combines it with state-of-the-art lossy compression to achieve compression ratios up to 16:1 and to improve the utilization of chip’s bandwidth resources. Compressing memory traffic yields lower memory access time, improving system performance, and energy efficiency. Compressing I/O traffic offers several benefits for resource-constrained systems, including more efficient storage and n

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HAN, FENGXIA, QING LIU, XIN GUO, MENG ZHANG, and XIA HAN. "ANALYTICAL STUDY ON AXIAL AND ECCENTRIC COMPRESSIVE BEHAVIOR OF POPLAR COLUMN STRENGTHENED BY BFRP." WOOD RESEARCH 67(1) 2022 67, no. 1 (January 16, 2022): 11–25. http://dx.doi.org/10.37763/wr.1336-4561/67.1.1125.

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In this work, the compression behaviour of the Xinjiang poplar column was reinforced by basalt fibre reinforced polymer (BFRP) strips with different reinforced configurations, and thenumerical simulations were performed on the axial and eccentric compressions of poplar columns unreinforced and reinforced with BFRP to assess the effect of the bearing capacity and deformation of the columns. The results show that the use of BFRP to reinforce the Xinjiang poplar column effectively improves its axial compressive bearing capacity (axial compression) andbending bearing capacity (eccentric compressio

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Fortin, M., J. Soulhat, A. Shirazi-Adl, E. B. Hunziker, and M. D. Buschmann. "Unconfined Compression of Articular Cartilage: Nonlinear Behavior and Comparison With a Fibril-Reinforced Biphasic Model." Journal of Biomechanical Engineering 122, no. 2 (October 18, 1999): 189–95. http://dx.doi.org/10.1115/1.429641.

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Mechanical behavior of articular cartilage was characterized in unconfined compression to delineate regimes of linear and nonlinear behavior, to investigate the ability of a fibril-reinforced biphasic model to describe measurements, and to test the prediction of biphasic and poroelastic models that tissue dimensions alter tissue stiffness through a specific scaling law for time and frequency. Disks of full-thickness adult articular cartilage from bovine humeral heads were subjected to successive applications of small-amplitude ramp compressions cumulating to a 10 percent compression offset whe

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Lee, Jae-Min, and Hyeong-Wan Yun. "Effect of Chest Compression Position Depending on the Rescuer’s Hip Joint Angle During Basic CPR." Fire Science and Engineering 34, no. 2 (April 30, 2020): 103–9. http://dx.doi.org/10.7731/kifse.0902eaff.

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This study aims to investigate the improvement in basic CPR quality on the basis of the hip joint angle of the rescuer among students in the Department of Emergency Medical Technology who completed a basic CPR curriculum. In this study, we carried out a comparative analysis using SimPad SkillReporter and Resusci Anne® QCPR® to measure the quality of CPR (depth of chest compressions, full relaxation, compression speed, and more) on the basis of the rescuer’s hip joint angle in accordance with the 2015 AHA Guidelines and conducted chest compressions and CPR 5 times in a 30:2 ratio. It was found

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George, Bernard, and Claude Laurian. "Impairment of Vertebral Artery Flow Caused by Extrinsic Lesions." Neurosurgery 24, no. 2 (February 1, 1989): 206–14. http://dx.doi.org/10.1227/00006123-198902000-00009.

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Abstract In a consecutive series of 71 cases of extrinsic lesions involving the vertebral artery (VA), 51 patients presented with external compression of this vessel. The compressive agents included 34 tumors, 4 osteophytes, 5 fibrous bands, 4 traumatic lesions, 2 neural elements, and 2 infectious processes. The main site was the second portion of the VA (C2-C6) (30 of 51 patients). Compression always induced at least significant stenosis, and in 8 patients caused complete occlusion. The compression was either permanent (44 patients) or intermittent (7 patients). Symptoms were observed in 11 p

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Sarinova, Assiya, Alexandr Neftissov, Leyla Rzayeva, Alimzhan Yessenov, Lalita Kirichenko, and Ilyas Kazambayev. "Development of an algorithm for compressing aerospace images for the subsequent recognition and identification of various objects." Information technology. Industry control systems 3, no. 2 (129) (June 28, 2024): 83–94. http://dx.doi.org/10.15587/1729-4061.2024.306973.

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The object of study is the recognition and identification of various objects in aerospace images. To solve the problems of compressing hyperspectral aerospace images with losses, the development of a compression algorithm is proposed. As a result, an algorithm has been developed for compressing aerospace images for subsequent recognition and identification of various objects using wavelet transform for processing high- and medium-resolution space images when monitoring from remote sensing satellites, based on the use of structural features of object images. In particular, orthogonal and wavele

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Cao, Han Xue, Si Yuan Long, and Hui Min Liao. "Compressive Deformation of Cast AM60B Mg Alloy at Elevated Temperatures." Materials Science Forum 546-549 (May 2007): 271–74. http://dx.doi.org/10.4028/www.scientific.net/msf.546-549.271.

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The deformability of cast AM60B Mg alloy is investigated by compressing AM60B cast ingots at elevated temperatures. The empirical results show that cast AM60B Mg alloy was brittle at room temperature and prone to cracking during compression, however at the temperatures ranging from 573 to 673K, excellent deformability is demonstrated with around 70% compression ratio. The compressive deformation constitutive equation for AM60B Mg alloy at elevated temperatures was established. The stress-strain relationships predicted at elevated temperatures show good agreement with experimental findings.

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Lee, S. "Density ratios in compressions driven by radiation pressure." Laser and Particle Beams 6, no. 3 (August 1988): 597–606. http://dx.doi.org/10.1017/s026303460000553x.

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It has been recently suggested (Hora & Miley 1984) that in the cannonball scheme of laser compression the pellet may be considered to be compressed by the ‘brute force’ of the radiation pressure. For such a radiation-driven compression, this paper applies an energy balance method to give an equation fixing the radius compression ratio κ which is a key parameter for such intense compressions. A shock model is used to yield specific results. For a square-pulse driving power compressing a spherical pellet with a specific heat ratio of 5/3, a density compression ratio Γ of 27 is computed. Doub

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Darmawan, Rendi Editya, Untung Sujianto, and Nana Rochana. "Implementation of Chest Compression for Cardiac Arrest Patient in Indonesia: True or False." Jurnal Ners 16, no. 1 (January 19, 2021): 13. http://dx.doi.org/10.20473/jn.v16i1.17508.

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Introduction: The highest cause of death is cardiac arrest. Proper manual chest compression will increase survival of cardiac arrest. The aim of this study was to know the implementation of chest compressions for cardiac arrest patient in Indonesia.Methods: This study used a descriptive quantitative design. The samples were nurse and code blue team when performing manual chest compression to 74 patients experiencing cardiac arrest. The sample have body mass index (BMI) > 20. Research was conducted in two hospitals in Java, Indonesia. Implementation of chest compression is measured based on

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Sazonov, I. A., M. A. Mokhov, Kh A. Tumanyan, M. A. Frankov, and S. I. Markelov. "Development of an Automated Compressor Unit for Gas Compression at the Periodic Connection of an Ejector." Journal of Computational and Theoretical Nanoscience 16, no. 12 (December 1, 2019): 5378–83. http://dx.doi.org/10.1166/jctn.2019.8586.

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The authors developed a new scientific approach for gas compression using ejector compressor units. A new patented technical solution opens up the prospect for the effective use of ejector compressor units when compressing various gases to pressures of 10…40 MPa. The goal of the research work is the development of automation systems using new scientific principles for gas compression. A new scientific approach is associated with the improvement of the ejector compressor unit, with the provision of conditions for the periodic connection of the ejector as part of the implementation of the cyclic

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Grieb, M., and A. Brümmer. "Thermodynamic simulation of a water-injected twin-screw steam compressor." IOP Conference Series: Materials Science and Engineering 1322, no. 1 (December 1, 2024): 012017. https://doi.org/10.1088/1757-899x/1322/1/012017.

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Abstract Decarbonisation of industrial heating and process steam generation is crucial for the mitigation of advancing climate change. High-temperature heat pumps can meet these demands while effectively integrating with renewable energy sources, outperforming traditional heating and boiling systems, especially when operating with natural refrigerants. Since compressor efficiency is critical for the effectiveness of heat pump systems, particular care is required in compressor design and specification. Detailed thermodynamic simulations of the compressor system are indispensable in this process

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Xu, Haoran, Petr M. Anisimov, Bruce E. Carlsten, Leanne D. Duffy, Quinn R. Marksteiner, and River R. Robles. "X-ray Free Electron Laser Accelerator Lattice Design Using Laser-Assisted Bunch Compression." Applied Sciences 13, no. 4 (February 10, 2023): 2285. http://dx.doi.org/10.3390/app13042285.

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We report the start-to-end modeling of our accelerator lattice design employing a laser-assisted bunch compression (LABC) scheme in an X-ray free electron laser (XFEL), using the proposed Matter-Radiation Interactions in Extremes (MaRIE) XFEL parameters. The accelerator lattice utilized a two-stage bunch compression scheme, with the first bunch compressor performing a conventional bulk compression enhancing the beam current from 20 A to 500 A, at 750 MeV. The second bunch compression was achieved by modulating the beam immediately downstream of the first bunch compressor by a laser with 1-μm w

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Meinich-Bache, Øyvind, Kjersti Engan, Tonje Søraas Birkenes, and Helge Myklebust. "Real-Time Chest Compression Quality Measurements by Smartphone Camera." Journal of Healthcare Engineering 2018 (October 28, 2018): 1–12. http://dx.doi.org/10.1155/2018/6241856.

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Out-of-hospital cardiac arrest (OHCA) is recognized as a global mortality challenge, and digital strategies could contribute to increase the chance of survival. In this paper, we investigate if cardiopulmonary resuscitation (CPR) quality measurement using smartphone video analysis in real-time is feasible for a range of conditions. With the use of a web-connected smartphone application which utilizes the smartphone camera, we detect inactivity and chest compressions and measure chest compression rate with real-time feedback to both the caller who performs chest compressions and over the web to

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Messere, Alessandro, Gianluca Ceravolo, Walter Franco, Daniela Maffiodo, Carlo Ferraresi, and Silvestro Roatta. "Increased tissue oxygenation explains the attenuation of hyperemia upon repetitive pneumatic compression of the lower leg." Journal of Applied Physiology 123, no. 6 (December 1, 2017): 1451–60. http://dx.doi.org/10.1152/japplphysiol.00511.2017.

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The rapid hyperemia evoked by muscle compression is short lived and was recently shown to undergo a rapid decrease even in spite of continuing mechanical stimulation. The present study aims at investigating the mechanisms underlying this attenuation, which include local metabolic mechanisms, desensitization of mechanosensitive pathways, and reduced efficacy of the muscle pump. In 10 healthy subjects, short sequences of mechanical compressions ( n = 3–6; 150 mmHg) of the lower leg were delivered at different interstimulus intervals (ranging from 20 to 160 s) through a customized pneumatic devic

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Glukhov, Gennadiy Vasilyevich. "Linguistic compression at the level of word formation in English economic discourse." Philology. Issues of Theory and Practice 17, no. 7 (July 29, 2024): 2512–17. http://dx.doi.org/10.30853/phil20240357.

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The purpose of the study is to identify the features of the structure and semantics of word-formation compressions in English economic discourse. Clarifying the meaning of the term "linguistic compression" gives the author the opportunity to determine the means of expressing compression at the word-formation level in the economic sphere. The research has a scientific novelty, which consists in the fact that as a result of the first comprehensive analysis of the means of compressive word formation in English economic discourse, productive word-formation models were identified and described, as

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SHIMIZU, ICHIRO, NAOYA TADA, and KOSUKE NAKAYAMA. "THE INFLUENCE OF STRAIN PATH ON BIAXIAL COMPRESSIVE BEHAVIOR OF AZ31 MAGNESIUM ALLOY." International Journal of Modern Physics B 22, no. 31n32 (December 30, 2008): 5844–49. http://dx.doi.org/10.1142/s0217979208051261.

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The strain path dependence of the compressive flow behavior of cast AZ31 magnesium alloy was investigated. Biaxial compression tests with linear strain paths were conducted using a unique biaxial compression device. It was found that the equivalent stress-strain relations varied according to the strain paths. The work contour for linear strain paths was well described by the Logan-Hosford yield criterion. Biaxial compressions with abrupt strain path change were also carried out to investigate the influences of the prestrain amplitude and angular relation of the sequential strain paths on the f

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Kim, Kyoung Hoon, and Chul Ho Han. "Performance Analysis of Wet Compression Process under Critical Conditions of Water Injection." Applied Mechanics and Materials 229-231 (November 2012): 2541–45. http://dx.doi.org/10.4028/www.scientific.net/amm.229-231.2541.

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In wet compression process water is injected at an inlet of compressor and continuous cooling occurs due to evaporation of water droplets during the compression process of air, which can save the compression work and enhance the performance of gas turbine system. In this work, performance analysis of the wet compression process is carried out under the critical conditions of water injection which are defined as the maximum water injection which can be evaporated completely inside the compressor. For various ambient conditions the important variables of wet compression process such as water inj

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Ji, Guang Kai, Xiao Liu, and Zhao Qun Du. "Analysis on Plane and Ball Compression Behaviour of Spacer Fabric." Advanced Materials Research 332-334 (September 2011): 1049–52. http://dx.doi.org/10.4028/www.scientific.net/amr.332-334.1049.

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In present paper, the compression force and strain curve for both plane plate and spherical ball compressions are conducted, where the compression stress and strain curve in plane plate compression is calculated and divided into three linear sections. Each linear region has corresponding compression modulus. In addition, three compression characters of both plate plane and spherical ball compressions are featured as compression work, maximum pressure/force and linear degree. Correlations between the three characters of compression property show that there exist high correlations between compre

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Goyal, V. K., A. K. Fletcher, and S. Rangan. "Compressive Sampling and Lossy Compression." IEEE Signal Processing Magazine 25, no. 2 (March 2008): 48–56. http://dx.doi.org/10.1109/msp.2007.915001.

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Shin, So-Yeon. "Analysis and Improvement Plan of Chest Compression and Ventilation during Transport." Fire Science and Engineering 36, no. 4 (August 31, 2022): 51–57. http://dx.doi.org/10.7731/kifse.0ec41f56.

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This study aimed to compare the outcomes of manual and automated chest compressions during virtual reality (VR)-based ambulance transport and measure the ventilation and airway pressure provided by different types of portable positive pressure ventilation in the national fire academy. The chest compression depths were 53.78 mm and 49.01 mm for automated and manual chest compressions, respectively, showing that automated chest compression achieved the appropriate compression depth. The compression rates were 101.8 times per min and 122.6 times per min for automated and manual compressions, resp

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Sharath, R., Sinha Shivani, B.I Supreeth, Hebbar B.C. Varun, and B. Santhosh. "Distributed Data Compression using Cloud Computing Approach." Journal of Optical Communication Electronics 5, no. 2 (May 1, 2019): 5–10. https://doi.org/10.5281/zenodo.2656008.

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<em>Storage and data trafficking have grown a great deal over the past decade. Therefore, there is a need to reduce the size of the data for better speed and proper utilization of the bandwidth. There are compressions that happen online as well as some happen statically. The online based compression is in greater demand, since an online platform is much easier and faster. Static methods have a requisition of the entire file to be present at the time of transmission, while online compressions don’t. Compressions make use of an algorithm to effectively shrink the data. Depending upon the s

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Pan, Xi, Man Wang, Zi-wen Xing, and Shu-lin Pan. "Structural study on a swing compressor with no valves for air compression." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 232, no. 23 (December 27, 2017): 4390–98. http://dx.doi.org/10.1177/0954406217750188.

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This paper presents a novel swing compressor with no valves employed in air compression. The design and work principle of this swing compressor are introduced. And the effects of discharge port, exhaust cavity, and crank speed on the performances of this compressor are analyzed. Under the same operating conditions and dimensions, the size of exhaust cavity mainly depends on the discharge port width. Additionally, the exhaust cavity angle has a direct impact on the compression process, whether it is over-compression or under-compression. And the over-compression loss can be designed below 2%. O

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Gindl, W. "Comparing Mechanical Properties of Normal and Compression Wood in Norway Spruce: The Role of Lignin in Compression Parallel to the Grain." Holzforschung 56, no. 4 (June 27, 2002): 395–401. http://dx.doi.org/10.1515/hf.2002.062.

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Summary Cell-wall lignin content and composition, as well as microfibril angle of normal and compression wood samples were determined prior to mechanical testing in compression parallel to the grain. No effect of increased lignin content on the Young's modulus in compression wood was discernible because of the dominating influence of microfibril angle. In contrast, compressive strength of compression wood was not negatively affected by the high microfibril angle. It is proposed that the observed high lignification in compression wood increases the resistance of the cell walls to compression fa

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Zamfirescu, Calin. "MODELING AND OPTIMIZATION OF AN AMMONIA-WATER COMPRESSION-RESORPTION HEAT PUMPS WITH WET COMPRESSION." Transactions of the Canadian Society for Mechanical Engineering 33, no. 1 (March 2009): 75–88. http://dx.doi.org/10.1139/tcsme-2009-0008.

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Wet ammonia-water compression-resorption heat pumps constitute an attractive alternative to the commonly known heat pumps based on Osenbrück cycle because they eliminate the necessity of oil-liquid refrigerant separation. In this respect, a special designed oil-free compressor operating under wet (two-phase) conditions equips the heat pump. The compressor is lubricated by the liquid refrigerant which is carried-out while compressing the vapor. The thermodynamic cycle is located completely inside the two-phase region. In this paper are demonstrated two procedures to optimize the design for COP

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WU, JOHN Z., REN G. DONG, W. PAUL SMUTZ, and AARON W. SCHOPPER. "EFFECTS OF PRECONDITIONING ON THE ELASTIC BEHAVIOR OF SKIN UNDER COMPRESSIVE LOADING." Journal of Mechanics in Medicine and Biology 03, no. 03n04 (September 2003): 275–83. http://dx.doi.org/10.1142/s0219519403000788.

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In physiological loading conditions, the skin tissues are, sometimes, loaded compressively. The mechanical characteristics of skins in tension have been studied intensively, while those in compression have not been studied thoroughly. Previous studies suggested that, in order to obtain repeatable mechanical parameters, the skin sample should be properly preconditioned in the tensile tests. The present study is to investigate if the skin sample should be preconditioned in the compressive tests. Pigskins were used in the present study. Compression tests were performed in confined and unconfined

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JAMES, BRYONY, and CELIA FONSECA. "TEXTURE STUDIES AND COMPRESSION BEHAVIOUR OF APPLE FLESH." International Journal of Modern Physics B 20, no. 25n27 (October 30, 2006): 3993–98. http://dx.doi.org/10.1142/s021797920604074x.

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Compressive behavior of fruit flesh has been studied using mechanical tests and microstructural analysis. Apple flesh from two cultivars (Braeburn and Cox's Orange Pippin) was investigated to represent the extremes in a spectrum of fruit flesh types, hard and juicy (Braeburn) and soft and mealy (Cox's). Force-deformation curves produced during compression of unconstrained discs of apple flesh followed trends predicted from the literature for each of the "juicy" and "mealy" types. The curves display the rupture point and, in some cases, a point of inflection that may be related to the point of

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Viguié, Jeremie, P. J. J. Dumont, P. Vacher, Laurent Orgéas, I. Desloges, and E. Mauret. "Analysis of the Strain and Stress Fields of Cardboard Box during Compression by 3D Digital Image Correlation." Applied Mechanics and Materials 24-25 (June 2010): 103–8. http://dx.doi.org/10.4028/www.scientific.net/amm.24-25.103.

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Corrugated boards with small flutes appear as good alternatives to replace packaging folding boards or plastic materials due their small thickness, possibility of easy recycling and biodegradability. Boxes made up of these materials have to withstand significant compressive loading conditions during transport and storage. In order to evaluate their structural performance, the box compression test is the most currently performed experiment. It consists in compressing an empty container between two parallel plates at constant velocity. Usually it is observed that buckling phenomena are localized

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Boeva, E. A., D. O. Starostin, M. A. Milovanova, V. V. Antonova, D. Ch Kargin, and S. N. Abdusalamov. "Assessment of the Quality of Chest Compressions Performed by Health-Care Workers Under Simulated Conditions." General Reanimatology 17, no. 4 (August 27, 2021): 37–47. http://dx.doi.org/10.15360/1813-9779-2021-4-37-47.

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Aim of the study: to investigate chest compression parameters by city hospital staﬀ under simulated conditions with and without the use of a sensor device for quality control of chest compressions.Materials and Methods. The study was conducted in Moscow's multidisciplinary hospitals. The study included 359 medical staﬀ members. The participants were divided into 4 groups: physicians (n=97) and nurses (n=82) from intensive care units (ICU) and physicians (n=92) and nurses (n=88) from specialized departments. Participants performed 2 minutes of chest compressions without a chest compressions qua

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Lee, Jang Hee, Sang Kuk Han, and Ji Ung Na. "Current Guideline of Chest Compression Depth for Children of All Ages May Be Too Deep for Younger Children." Emergency Medicine International 2019 (June 19, 2019): 1–7. http://dx.doi.org/10.1155/2019/7841759.

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Aim. To determine whether the chest compression depth of at least 1/3 of the Anteroposterior (AP) diameter of the chest and about 5 cm is appropriate for children of all age groups via chest computed tomography. Methods. The AP diameter of the chest, anterior chest wall diameter, and compressible diameter (Cd) were measured at the lower half of the sternum for patients aged 1-18 years using chest computed tomography. The mean ratio of 5 cm compression to the Cd of adult patients was used as the lower limit, and the mean ratio of 6 cm compression to the Cd of adult patients was used as the uppe

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Khazanov, E. A., Sergei Yu Mironov, and Gérard Mourou. "Nonlinear compression of high-power laser pulses: compression after compressor approach." Uspekhi Fizicheskih Nauk 189, no. 11 (May 2019): 1173–200. http://dx.doi.org/10.3367/ufnr.2019.05.038564.

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Khazanov, E. A., S. Yu Mironov, and G. A. Mourou. "Nonlinear compression of high-power laser pulses: compression after compressor approach." Physics-Uspekhi 62, no. 11 (November 30, 2019): 1096–124. http://dx.doi.org/10.3367/ufne.2019.05.038564.

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Li, Jian, Yaoguang Zhou, Mohammad Rauf Sheikhi, and Selim Gürgen. "Enhanced Compression Properties of Open-Cell Foams Reinforced with Shear-Thickening Fluids and Shear-Stiffening Polymers." Polymers 17, no. 9 (April 29, 2025): 1218. https://doi.org/10.3390/polym17091218.

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Open-cell PU foams have a wide range of industrial applications due to their excellent cushioning, impact protection, packaging, thermal insulation, and sound reduction benefits. The foams absorb impact energy while deforming under compressing and are ideal for applications with severe and repeated loading conditions. Enhancing and improving their compressive durability is a vital area of ongoing research. We investigated the effect of incorporating shear-stiffening polymers (SSPs) and shear-thickening fluids (STFs) on the compression properties of open-cell foams. Rheological properties of ST

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Tsutsumi, Satoshi, Hideo Ono, and Yukimasa Yasumoto. "Vascular Compression of the Anterior Optic Pathway: A Rare Occurrence?" Canadian Association of Radiologists Journal 68, no. 4 (November 2017): 409–13. http://dx.doi.org/10.1016/j.carj.2017.02.001.

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Background Vascular compression of the anterior optic pathway has been documented as an infrequent cause of visual impairments. Here we characterize such vascular compression using magnetic resonance imaging. Methods A total of 183 patients without pathologies affecting the optic pathways underwent T2-weighted or constructive interference steady-state sequence magnetic resonance imaging. Imaging data from coronal sections were analyzed. Results A vascular compression of the anterior optic pathway was identified in 20 patients (11%). They comprised 13 men and 7 women with a mean age of 60.8 yea

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Wang, Yan Wei, and Hui Li Yu. "Wavelet Transforms of Image Reconstruction Based on Compressed Sampling." Applied Mechanics and Materials 58-60 (June 2011): 1920–25. http://dx.doi.org/10.4028/www.scientific.net/amm.58-60.1920.

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A compressive sensing technique for image signal to cope with image compression and restoration is adopted in this paper. First of all wavelet transforms method is applied in image compressing to preserve the constructive, Secondly, sparse matrix is available by required wavelet ratio. Thirdly, the compressing image is used to restoration the original image. Experimental results show that the proposed algorithm is effective and compares favorably with existing techniques.

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Chen, Xinyu, Jiannan Tian, Ian Beaver, Cynthia Freeman, Yan Yan, Jianguo Wang, and Dingwen Tao. "FCBench: Cross-Domain Benchmarking of Lossless Compression for Floating-Point Data." Proceedings of the VLDB Endowment 17, no. 6 (February 2024): 1418–31. http://dx.doi.org/10.14778/3648160.3648180.

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While both the database and high-performance computing (HPC) communities utilize lossless compression methods to minimize floating-point data size, a disconnect persists between them. Each community designs and assesses methods in a domain-specific manner, making it unclear if HPC compression techniques can benefit database applications or vice versa. With the HPC community increasingly leaning towards in-situ analysis and visualization, more floating-point data from scientific simulations are being stored in databases like Key-Value Stores and queried using in-memory retrieval paradigms. This

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Levihin, A.A., and I.A. Volobuev. "Microturbine Wave Compressor Optimal Regimes." Problemele Energeticii Regionale 2(43) (August 13, 2019): 1–9. https://doi.org/10.5281/zenodo.3367056.

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The work is devoted to the problem of improving the efficiency of air compression in the compressor of the microturbine installation. The wave compressor in which compression occurs as in a supersonic air intake is investigated. The purpose of the study isto find the region of existence of optimal shock-wave structures at which the stagnation pressure loss in a wave compressor will be minimal. Two cases were studied: compression in a system of two shock waves of the same direction; compression in a centered isentropic wave. The research method combines a numerical experiment with an analytical

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Liu, Chunlei, Qun Zheng, Qi Wang, Aqiang Lin, Yuting Jiang, and Mingcong Luo. "Sensitivity Analysis of Multistage Compressor Characteristics Under the Spray Atomization Effect Using a CFD Model." Energies 12, no. 2 (January 18, 2019): 301. http://dx.doi.org/10.3390/en12020301.

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In this paper, a CFD model is used to simulate the effect of spray atomization at the compressor inlet on a multistage axial subsonic compressor. Special attention is paid to the change of compressor characteristics with wet compression under different rotating speeds to gain the compressor characteristic lines of wet compression. The effects of pneumatic crushing and blade-wall-collision on water droplets and droplet trajectories are contrasted and analyzed under different spray conditions. Then, the whole/stage-by-stage compressor performances and the flow field are also investigated under d

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Lau, Tiffany Wai Shan, Anthony Robert Lim, Kyra Anne Len, and Loren Gene Yamamoto. "Chest compression efficacy of child resuscitators." Journal of Paramedic Practice 13, no. 11 (November 2, 2021): 448–55. http://dx.doi.org/10.12968/jpar.2021.13.11.448.

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Background: Chest compression efficacy determines blood flow in cardiopulmonary resuscitation (CPR) and relies on body mechanics, so resuscitator weight matters. Individuals of insufficient weight are incapable of generating a sufficient downward chest compression force using traditional methods. Aims: This study investigated how a resuscitator's weight affects chest compression efficacy, determined the minimum weight required to perform chest compressions and, for children and adults below this minimum weight, examine alternate means to perform chest compressions. Methods: Volunteers aged 8 y

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Peer, Syed Murfad, Syed Bukhari, Manan Desai, Aybala Tongut, Anthony Ho, Can Yerebakan, Karthik Ramakrishnan, et al. "Compression Device-Assisted Extracorporeal Cardiopulmonary Resuscitation Cannulation in Pediatric Patients—A Simulation Study." World Journal for Pediatric and Congenital Heart Surgery 13, no. 3 (April 21, 2022): 379–82. http://dx.doi.org/10.1177/21501351221084304.

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Background: Surgical neck cannulation for pediatric extracorporeal cardiopulmonary resuscitation (ECPR) requires multiple interruptions of manual chest compressions to facilitate the procedure. Effective uninterrupted CPR is essential to prevent neurological injury. We hypothesized that an automated chest compression device can be used to provide effective and uninterrupted chest compressions during pediatric neck ECPR cannulation. The feasibility of surgically cannulating the right carotid artery and right internal jugular vein in an infant during ongoing automated chest compressions was test

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Kang, Hyun-Su, Sung-Yeon Kim, and Youn-Jea Kim. "Wet Compression Study for an Aero-Thermodynamic Performance Analysis of a Centrifugal Compressor at Design and Off-Design Points." Processes 10, no. 5 (May 9, 2022): 936. http://dx.doi.org/10.3390/pr10050936.

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In this study, to analyze the effect of wet compression technology on the aero-thermodynamic performance of a centrifugal compressor, a numerical analysis study was conducted on the design point and off-design point. Wet compression technology sprays water droplets at the inlet of the compressor. During the compression process, water droplets evaporate, reducing the heat of compression and reducing the compression work, which improves the efficiency of the compressor. In wet compression technology, detailed research is needed for the application to compressors because the droplet behavior affe

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