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Journal articles on the topic 'Capacità portante'

Author: Grafiati

Published: 4 June 2021

Last updated: 4 February 2022

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1

Bouassida, Mounir, and Belgacem Jellali. "Capacité portante ultime d'un sol renforcé par une tranchée." Revue Française de Génie Civil 6, no. 7-8 (January 2002): 1381–95. http://dx.doi.org/10.1080/12795119.2002.9692414.

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2

Klvač, R., P. Vrána, and R. Jiroušek. "Possibilities of using the portable falling weight deflectometer to measure the bearing capacity and compaction of forest soils." Journal of Forest Science 56, No. 3 (April 1, 2010): 130–36. http://dx.doi.org/10.17221/71/2009-jfs.

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The paper discusses possibilities of using the portable falling weight deflectometer to measure the bearing capacity and compaction of forest soils.<B> </B>Within the study, measurements were made using manual penetrometer and Loadman II portable falling weight deflectometer. To eliminate the extreme values, Grubbs’s test was used. The results indicate that Loadman II deflectometer may be used to measure both the bearing capacity and compaction of forest soils under the canopy as well as in transport lines. A significant difference was found between deflection of water-unaffected sites and water-affected sites (12.08 and 2.31 mm, respectively). Measurements of bearing capacity after removal of forest litter give far more precise details; however, the authors do not refuse the measurements without litter removal, either. To determine the degrees of soil compaction, it is useful to measure the soil reaction time; to measure the bearing capacity it is vital to measure deflection. <B></B>

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3

Arriaga, F., M. Esteban, and E. Relea. "Evaluación de la capacidad portante de piezas de gruesa escuadría de madera de conifera en estructuras existentes." Materiales de Construcción 55, no. 280 (December 30, 2005): 43–52. http://dx.doi.org/10.3989/mc.2005.v55.i280.205.

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4

Belabed, L., and M. Bencheikh. "Analyse semi-probabiliste de la capacité portante des fondations superficielles." Revue Française de Géotechnique, no. 124 (2008): 61–75. http://dx.doi.org/10.1051/geotech/2008124061.

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5

Shehi, Jasmina, Valentina De Marchi, Eleonora Di Maria, Andrea Pellizzari, Mirco Zerlottin, and Davide Beltrame. "Performance ambientale nel distretto della concia di arzignano: tra iniziativa imprenditoriale e intervento istituzionale." ECONOMIA E SOCIETÀ REGIONALE, no. 1 (June 2021): 152–78. http://dx.doi.org/10.3280/es2021-001012.

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Molto si è discusso sulla capacità dei distretti industriali italiani di fornire un vantaggio alle imprese che lo compongono in termini di capacità innovativa, flessibilità e produttività. Nell'ambito di questo dibattito, il presente lavoro si pone l'obiettivo di discutere se e come tale potenzialità possa portare non solo benefici economici ma anche vantaggi ambientali. L'agglomerazione in un territorio ristretto di attività produttive che insistono sulle stesse ri-sorse può portare a un forte degrado ambientale, ma anche a una maggiore pressione dagli stakeholder locali per invertire questa tendenza, portando a situazioni più virtuose che in altri territori. In questo scenario è presentato il contesto di Arzignano come esempio di come le dinamiche distrettuali possano innescare una propensione alla sostenibilità ambientale. Attra-verso l'analisi dei dati sul livello di inquinamento delle imprese e considerando le attività isti-tuzionali condotte da Acque del Chiampo Spa, l'ente gestore dell'impianto collettivo di depu-razione, si descrivono le attività di eco-innovazione introdotte e le performance ottenute, dan-do spunti utili per comprendere come i distretti industriali possano diventare attori del cam-biamento verso la sostenibilità e del contesto istituzionale di supporto in questa transizione.

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6

Wilcox, Kevin. "Inexpensive, Portable, Nondestructive Equipment Tests Bridge Capacity." Civil Engineering Magazine Archive 88, no. 2 (February 2018): 36–37. http://dx.doi.org/10.1061/ciegag.0001270.

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7

Park, Min, and Volkan Rodoplu. "Core Capacity Region of Portable Wireless Networks." IEEE Transactions on Wireless Communications 6, no. 11 (November 2007): 3897–901. http://dx.doi.org/10.1109/twc.2007.060305.

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8

Murat, J. R., and R. Tinawi. "La capacité portante à court terme de la glace de mer colonnaire annuelle." Canadian Journal of Civil Engineering 13, no. 2 (April 1, 1986): 171–87. http://dx.doi.org/10.1139/l86-025.

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This paper deals with the bearing capacity of sea ice covers taking into consideration the nonhomogeneity of the material, which is primarily due to variations in temperature and salinity across the thickness. The study is limited to the evaluation of short-term loads that would cause cracking in the ice cover. The general method for evaluation of such loads is fully developed and simplified formulae are proposed for a given surface temperature and ice thickness. Key words: bearing capacity, sea ice.

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9

Siraj-Eldine, K., and A. Bottero. "Étude expérimentale de la capacité portante d'une couche de sol pulverulent d'épaisseur limitée." Canadian Geotechnical Journal 24, no. 2 (May 1, 1987): 242–51. http://dx.doi.org/10.1139/t87-029.

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This paper presents a series of experimental measurements of the bearing capacity of spread foundations resting on a layer of sand of finite thickness; they are carried out using circular or rectangular laboratory models. After an analysis of the graphical expression of results illustrating the foundation–soil behaviour under the applied load, we study the relationships between the bearing capacity coefficient and the different parameters of the problem: relative thickness of the compressible layer, interfacial foundation–soil and soil–substratum conditions of friction, shape factor of the models.In every case, the results have been compared with available results of other authors and related with existing theoretical or semiempirical methods; these comparisons lead to the proposal of a rational testing procedure for determining the ultimate load for shallow foundations. Key words: foundations, bearing capacity, interfaces, scale effect, shape factor, bilayer.

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10

Sukhanovskii, Yu P., V. A. Vitovtov, A. V. Prushchik, Yu A. Solov`eva, and S. I. Sanzharova. "Assessment of soil infiltration capacity by using portable rainfall simulator." Dokuchaev Soil Bulletin, no. 78 (May 1, 2015): 31–41. http://dx.doi.org/10.19047/0136-1694-2015-78-31-41.

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11

Desnanjaya, I. G. M. N., and I. M. A. Nugraha. "Portable waste capacity detection system based on microcontroller and website." Journal of Physics: Conference Series 1810, no. 1 (March 1, 2021): 012001. http://dx.doi.org/10.1088/1742-6596/1810/1/012001.

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12

Li, Bin, Somsubhra Chakraborty, Maria Fernanda Godoy Sosa, Nana Yaw O. Kusi, and David C. Weindorf. "Compost Cation Exchange Capacity via Portable X-Ray Fluorescence (PXRF) Spectrometry." Compost Science & Utilization 26, no. 4 (October 2, 2018): 271–78. http://dx.doi.org/10.1080/1065657x.2018.1522280.

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13

Roy, Marius, and Luc Tanguay. "Capacité portante de pieux isolés dans les argiles sensibles: étude de cas par la méthode pénétrométrique." Canadian Geotechnical Journal 26, no. 3 (August 1, 1989): 375–84. http://dx.doi.org/10.1139/t89-052.

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The penetrometer test has been used to determine the bearing capacity of driven and jacked-in single piles in sensitive clays. The cases presented in this paper were carried out on two sites with steel, concrete, and wooden piles. The bearing capacities calculated on the basis of the results of penetrometer tests show that this approach has a good potential and at the same time is simple and fast. It has been possible to obtain a calibration by a comparison with the loading tests carried out on each of the piles. Taking into account the low strength of some of our clays, experience has to be gained in order to adapt the lateral unit friction curves to our clays. This approach also has the advantage of allowing the determination of the bearing capacity of wooden piles and of taking into account the conical effect when determining the lateral friction component. Key words: penetrometer test, piles, bearing capacity, cohesive soils, point resistance, lateral friction, steel, concrete, wood. [Journal translation]

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14

Maloum, S., and J. G. Sieffert. "Interaction sol-fondation superficielle au voisinage de la crête d’un talus : analyse de la capacité portante." Revue Française de Géotechnique, no. 100 (2002): 83–89. http://dx.doi.org/10.1051/geotech/2002100083.

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15

Kłosowiak, R., J. Bartoszewicz, and R. Urbaniak. "Portable Heat Pump Testing Device." International Journal of Applied Mechanics and Engineering 20, no. 3 (August 1, 2015): 657–62. http://dx.doi.org/10.1515/ijame-2015-0044.

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Abstract The aim of this paper is to present the design and working principle of a portable testing device for heat pumps in the energy recirculation system. The presented test stand can be used for any refrigerating/reverse flow cycle device to calculate the device energy balance. The equipment is made of two portable containers of the capacity of 250 liters to simulate the air heat source and ground heat source with a system of temperature stabilization, compressor heat pump of the coefficient of performance (COP) of = 4.3, a failsafe system and a control and measurement system.

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16

SKOULAKIS, A., G. C. ANDROULAKIS, E. L. CLARK, S. M. HASSAN, P. LEE, J. CHATZAKIS, M. BAKAREZOS, et al. "A PORTABLE PULSED NEUTRON GENERATOR." International Journal of Modern Physics: Conference Series 27 (January 2014): 1460127. http://dx.doi.org/10.1142/s2010194514601276.

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The design and construction of a pulsed plasma focus device to be used as a portable neutron source for material analysis such as explosive detection using gamma spectroscopy is presented. The device is capable of operating at a repetitive rate of a few Hz. When deuterium gas is used, up to 105 neutrons per shot are expected to be produced with a temporal pulse width of a few tens of nanoseconds. The pulsed operation of the device and its portable size are its main advantage in comparison with the existing continuous neutron sources. Parts of the device include the electrical charging unit, the capacitor bank, the spark switch (spark gap), the trigger unit and the vacuum–fuel chamber / anode–cathode. Numerical simulations are used for the simulation of the electrical characteristics of the device including the scaling of the capacitor bank energies with total current, the pinch current, and the scaling of neutron yields with energies and currents. The MCNPX code is used to simulate the moderation of the produced neutrons in a simplified geometry and subsequently, the interaction of thermal neutrons with a test target and the corresponding prompt γ-ray generation.

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17

Han, Xiao-Jing, Xiao-Feng Ji, Qing Zhang, Jia-Wei Sun, Pei-Xia Sun, Wen-Jin Pan, Jian Wang, and Chun Yang. "Giant “molecular capacitor” arrays - portable sensors to determine ionizable compounds." Journal of Electroanalytical Chemistry 865 (May 2020): 114108. http://dx.doi.org/10.1016/j.jelechem.2020.114108.

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18

Ni, Wei, and Nobuo Nakajima. "Experimental Study on the Capacity of Compact MIMO Antennas for Portable Terminals." Wireless Personal Communications 58, no. 3 (September 1, 2010): 439–53. http://dx.doi.org/10.1007/s11277-010-0129-y.

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19

Zhao, Zhi Peng, Jun Wang, Chao Yun Mai, and Yu Xi Zhang. "A Multi-Channel Large-Capacity Acquisition and Storage System." Applied Mechanics and Materials 687-691 (November 2014): 3427–32. http://dx.doi.org/10.4028/www.scientific.net/amm.687-691.3427.

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In this paper, a multi-channel large-capacity acquisition and storage system is prototyped to meet the urgent need of multi-channel analog signals’ acquisition and analysis. Composed of an acquisition board and storage board based on FPGA, the system could acquire 4 channel signals and store them in 512GB flash array. Gigabit Ethernet is used to connect the system and PC, which ensures high throughout between them. Ping-pong operation and pipeline technology are applied to cover the programming time of flash to improve the access speed. The system is portable, stable, and expansible, and could be used in various areas.

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20

Gochicoa-Rangel, Laura, Rogelio Pérez-Padilla, Juan Carlos Vázquez-García, Mónica Silva-Cerón, Silvia Cid-Juárez, David Martínez-Briseño, Paul L. Enright, Robert Jensen, and Luis Torre-Bouscoulet. "Long-Term Stability of a Portable Carbon Monoxide Single-Breath Diffusing Capacity Instrument." Respiratory Care 62, no. 2 (September 27, 2016): 231–35. http://dx.doi.org/10.4187/respcare.04983.

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21

Hörman, A., R. Rimhanen-Finne, L. Maunula, C. H. von Bonsdorff, J. Rapala, K. Lahti, and M. L. Hänninen. "Evaluation of the purification capacity of nine portable, small-scale water purification devices." Water Science and Technology 50, no. 1 (July 1, 2004): 179–83. http://dx.doi.org/10.2166/wst.2004.0051.

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A test was performed to evaluate the microbial and chemical purification capacity of nine portable, small-scale water purification filter devices with production capacity less than 100 L/h. The devices were tested for simultaneous removal capacity of bacteria (cultured Escherichia coli, Clostridium perfringens, Klebsiella pneumoniae and Enterobacter cloacae), enteric protozoans (formalin-stored Cryptosporidium parvum oocysts), viral markers (F-RNA bacteriophages) and microcystins produced by toxic cyanobacterial cultures. In general, the devices tested were able to remove bacterial contaminants by 3.6-6.9 log10 units from raw water. Those devices based only on filtration through pores 0.2-0.4 μm or larger failed in viral and chemical purification. Only one device, based on reverse osmosis, was capable of removing F-RNA phages at concentrations under the detection limit and microcystins by 2.5 log10. The present study emphasised the need for evaluation tests of water purification devices from the public safety and HACCP (Hazard Analysis and Critical Control Point) points of view. Simultaneous testing for various pathogenic/indicator microbes and microcystins was shown to be a useful and practical way to obtain essential data on actual purification capacity of commercial small-scale drinking-water filters.

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22

Sharma, Aakriti, David C. Weindorf, DanDan Wang, and Somsubhra Chakraborty. "Characterizing soils via portable X-ray fluorescence spectrometer: 4. Cation exchange capacity (CEC)." Geoderma 239-240 (February 2015): 130–34. http://dx.doi.org/10.1016/j.geoderma.2014.10.001.

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23

Huang, Zhi Dong, Shuo Liu, Chun Lian Wang, Xiu Biao Qi, Zhi Qiang Yang, and Qing Yang Lang. "Modal Analysis of Portable Multifunctional Scooter Based on Solidworks." Advanced Materials Research 945-949 (June 2014): 103–6. http://dx.doi.org/10.4028/www.scientific.net/amr.945-949.103.

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Based on the structure of common scooter, a new portable multifunctional scooter with carrying capacity is developed. Modal analysis of side wheel frame and carrying device on the portable multifunctional scooter is investigated by Solidwoks software. The first five orders natural frequency and major modes of the side wheel frame and carrying device are clarified. The method and the result can be used as a reference of dynamic design and lay foundation for calculation and analysis of dynamic response for the portable multifunctional scooter.

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24

Plotinsky, Rachel N., Elizabeth A. Talbot, Deborah Yeager, and Jose T. Montero. "Epidemic Preparedness in New Hampshire: Assessment of Increased Airborne Infection Isolation Capacity 1 Year After Distribution of Portable Isolation Units." Infection Control & Hospital Epidemiology 28, no. 9 (September 2007): 1093–95. http://dx.doi.org/10.1086/519868.

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We surveyed hospital personnel regarding their preparedness to use and their actual use of portable isolation units that were distributed to increase facilities' capacity to place patients under airborne infection isolation precautions. Although personnel reported feeling prepared to use portable isolation units, the effectiveness of the unit deployment program would be enhanced by retrofitted rooms and an improved ability to monitor negative air pressure.

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25

Sharifian, Ahmad, and Jeri Tangalajuk Siang. "Impacts of Room Temperature on the Performance of a Portable Propane Air Conditioner." International Journal of Air-Conditioning and Refrigeration 23, no. 02 (May 27, 2015): 1550015. http://dx.doi.org/10.1142/s2010132515500157.

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The performance of a portable propane air conditioner system, in which the temperatures of the air passing over the condenser and evaporator are equal, has been experimentally investigated under different room temperatures and refrigerant charge levels. The research has been carried out in a range of room temperatures from 20°C to 35°C and in undercharge, standard charge and overcharge conditions. The results show that, at higher room temperatures, the refrigerant temperature in all parts of the system, the density of the refrigerant at the inlet and outlet of the condenser, mass of the refrigerant in the compressor, the mass flow rate of the refrigerant and the cooling capacity of the system in either the undercharge or full charge condition, the specific cooling capacity of the undercharge system, the useful work of the compressor, and the maximum pressure of the refrigerant increase. The increase in room temperature decreases the density of the refrigerant at the inlet and outlet of the capillary tube, the mass of the refrigerant in the capillary tube, the refrigerant subcooling at the inlet of the capillary tube, the maximum velocity of the refrigerant and the coefficient of performance. In addition, the increase in room temperature at overcharge condition causes an increase in the mass flow rate, cooling capacity and specific cooling capacity to a maximum value followed by their decrease. The most important difference between a portable air conditioner and a nonportable system is the increase in cooling capacity with an increase in room temperature in full charge condition.

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26

Zdobytskyi, A., O. Matviykiv, M. Lobur, T. Klymkovych, and N. Bokla. "Portable System for Sampling Liquid Atmospheric Precipitation." Computer Design Systems. Theory and Practice, no. 1 (2020): 71–78. http://dx.doi.org/10.23939/cds2019.01.071.

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The paper considers the possibility of determining the permanent and random sources of pollution of the environment by the level of pollution of liquid atmospheric precipitation. The problems of liquid atmospheric precipitation testing and monitoring of pollution concentration during precipitation are outlined. The expediency of developing of a portable system that allows collecting samples of liquid atmospheric precipitation in autonomous modes at different time intervals and periods of rainfall, regardless of the place of its installation, is substantiated. The design features of the electric and mechanical parts of the device, as well as the algorithm of their work, are described. The results of modeling and checking of the working capacity of the portable device, which determine the total mass flow of water, are described.

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27

Rago, Vincenzo, João Brito, Pedro Figueiredo, Thiago Carvalho, Tiago Fernandes, Pedro Fonseca, and António Rebelo. "Countermovement Jump Analysis Using Different Portable Devices: Implications for Field Testing." Sports 6, no. 3 (August 31, 2018): 91. http://dx.doi.org/10.3390/sports6030091.

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The aim of this study was to analyze the concurrent validity, test–retest reliability, and capacity to detect changes of four different portable devices used to measure a wide range of neuromuscular parameters derived from countermovement jump (CMJ). An accelerometric device (Myotest), a jump mat (Ergojump), an optical device (Optojump), and a smartphone app (MyJump) were simultaneously examined for concurrent validity against gold-standard measures (motion-capture system and a force platform). Twenty-two CMJ-derived variables were collected from 15 healthy male subjects (n = 60 CMJs). Contraction time (CT) and eccentric duration (EccD) measurements obtained from the Myotest were moderately to largely associated with and not different from force platform measurements (r = 0.31 to 0.64, ES = 0.11 to 0.18) and showed moderate test-retest reliability (intraclass correlation coefficient (ICC) = 0.92 to 0.97, coefficient of variation (CV) = 3.8 to 8.0%). Flight time (FT) and jump height (JH) from Ergojump, Optojump, and MyJump showed moderate to strong associations with gold-standard measurements (r = 0.57 to 0.98) and good test–retest reliability (ICC = 0.54 to 0.97, CV = 1.8 to 4.2). However, all portable devices underestimated JH (ES = 1.25 to 2.75). Independent of the instrument used, the analyzed CMJ variables showed good capacity to detect changes (standard error of measurement (SEM) < smallest worthwhile change (SWC)), with the exception of rate of force and rate of power development parameters, which showed marginal capacity (SEM > SWC). The Myotest is preferable to measure temporal parameters during ground contact, whereas Ergojump, Optojump, and MyJump devices may be preferable to measure FT and JH, with the Optojump being the most accurate.

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28

Anciaux, Nicolas, Morgane Berthelot, Laurent Braconnier, Luc Bouganim, Martine De la Blache, Georges Gardarin, Philippe Kesmarszky, et al. "A Tamper-Resistant and Portable Healthcare Folder." International Journal of Telemedicine and Applications 2008 (2008): 1–9. http://dx.doi.org/10.1155/2008/763534.

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Electronic health record (EHR) projects have been launched in most developed countries to increase the quality of healthcare while decreasing its cost. The benefits provided by centralizing the healthcare information in database systems are unquestionable in terms of information quality, availability, and protection against failure. Yet, patients are reluctant to give to a distant server the control over highly sensitive data (e.g., data revealing a severe or shameful disease). This paper capitalizes on a new hardware portable device, associating the security of a smart card to the storage capacity of a USB key, to give back to the patient the control over his medical data. This paper shows how this device can complement a traditional EHR server to (1) protect and share highly sensitive data among trusted parties and (2) provide a seamless access to the data even in disconnected mode. The proposed architecture is experimented in the context of a medicosocial network providing medical care and social services at home for elderly people.

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29

Rizzuti, Jacopo. "Giocare a perdere." PSICOTERAPIA PSICOANALITICA, no. 1 (June 2021): 170–78. http://dx.doi.org/10.3280/psp2021-001012.

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L'autore espone la sua esperienza clinica con una paziente che lo ha portato a dover affrontare intensi vissuti di controtransfert e sfide per la sua tecnica e per i suoi riferimenti teorici. Nel percorso terapeutico si intrecciano i conflitti sul lutto e la perdita nella paziente, con la necessaria capacità che il terapeuta deve trovare nel fare anch'egli un lutto, riguardante le idealizzazioni rispetto alla sua stessa professione. Il "giocare a perdere", è una capacità che, quindi, si sviluppa in entrambi i partecipanti al processo terapeutico.

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30

Khan, Muhammad Ali, Ahmed Farooq Cheema, Sohaib Zia Khan, and Shafiq-ur-Rehman Qureshi. "Image based portable wear debris analysis tool." Industrial Lubrication and Tribology 67, no. 4 (June 8, 2015): 389–98. http://dx.doi.org/10.1108/ilt-11-2014-0127.

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Purpose – The purpose of this paper is to show the development of an image processing-based portable equipment for an automatic wear debris analysis. It can analyze both the qualitative and quantitative features of machine wear debris: size, quantity, size distribution, shape, surface texture and material composition via color. Design/methodology/approach – It comprises hardware and software components which can take debris in near real-time from a machine oil sump and process it for features diagnosis. This processing provides the information of the basic features on the user screen which can further be used for machine component health diagnosis. Findings – The developed system has the capacity to replace the existing off-line methods due to its cost effectiveness and simplicity in operation. The system is able to analyze debris basic quantitative and qualitative features greater than 50 micron and less than 300 micron. Originality/value – Wear debris basic features analysis tool is developed and discussed. The portable and near real-time analysis offered by the discussed work can be more technically effective as compared to the existing off-line and online techniques.

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31

Velisala, Venkateswarlu, G. Naga Srinivasulu, B. Srinivasa Reddy, and K. Venkata Koteswara Rao. "Review on challenges of direct liquid fuel cells for portable application." World Journal of Engineering 12, no. 6 (December 1, 2015): 591–606. http://dx.doi.org/10.1260/1708-5284.12.6.591.

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Fuel cells technologies are the most promising green energy technologies for diverse applications. One of the fastest growing areas is the portable electronic applications where the power range is the order of 1–100 W. For most of the portable electronic devices, rechargeable battery is the major energy source. Due to limitations like limited capacity, requirement of external power for recharge have led many researchers to look for alternative power sources to power portable electronic devices. The high energy density of fuel cells makes them very attractive alternative to batteries for portable power applications. There are a variety of fuel cell technologies being considered to replace batteries in portable electronic equipment. Direct Liquid Fuel Cells (DLFCs) have attracted much attention due to their potential applications as a power source for portable electronic devices. The advantages of DLFCs over hydrogen fed PEM fuel cells include a higher theoretical energy density and efficiency, a more convenient handling of the streams, and enhanced safety. Unlike batteries, fuel cells need not be recharged, merely refueled. This paper provides an overview on challenges of DLFCs (Direct Liquid Fuel Cells), like fuel crossover, cost, durability, water management, weight and size along with approaches being investigated to solve these challenges. Portable Fuel Cell Commercialization Targets for future and producers of portable fuel cells across the globe are also discussed in this paper.

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32

Couratier, Philippe, François Vincent, Frederic Torny, Mathieu Lacoste, Boris Melloni, François Lemaire, and Marie‐Therese Antonini. "Spirometer‐dependence of vital capacity in ALS: Validation of a portable device in 52 patients." Amyotrophic Lateral Sclerosis 6, no. 4 (January 2005): 239–45. http://dx.doi.org/10.1080/14660820510043244.

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33

Han, Yu, Fan Liu, Liang Zhao, and Jiang Zhe. "An automatic and portable prosthetic cooling device with high cooling capacity based on phase change." Applied Thermal Engineering 104 (July 2016): 243–48. http://dx.doi.org/10.1016/j.applthermaleng.2016.05.074.

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34

KEMALASARI, KEMALASARI, PAULUS SUSETYO WARDANA, and RATNA ADIL. "Spirometer Non-Invasive dengan Sensor Piezoelektrik untuk Deteksi Kesehatan Paru-Paru." ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika 5, no. 2 (February 16, 2018): 188. http://dx.doi.org/10.26760/elkomika.v5i2.188.

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ABSTRAKPolusi udara dapat mempengaruhi kesehatan paru-paru. Umumnya pengukuran fungsi paru menggunakan spirometer, dilakukan di rumah sakit dan membutuhkan waktu yang lama untuk mengetahui hasilnya. Untuk mengatasi masalah ini, dirancang Spirometer non-invasive yang portable dengan menggunakan sensor piezoelektrik yang diletakkan di dada. Perubahan tekanan yang diukur oleh sensor piezoelektrik adalah 10 – 80 mV, sehingga diperlukan rangkaian amplifier, filter, clamper, mikrokontroler AVR ATMega 32 sebagai pengolah data I/O dan LCD grafik untuk menampilkan hasil ukur serta SD card untuk menyimpan data. Alat ini mengukur kapasitas vital paru-paru, respirasi rate, dan jika hasil ukur kapasitas vital paru-paru kurang dari 80 % dari nilai prediksi kapasitas paru-paru maka kondisi paru-paru dideteksi tidak sehat. Hasil dari pengujian menunjukkan bahwa persentase nilai keberhasilan alat adalah 95,70 %, hasil pengukuran dan deteksi kondisi paru-paru dapat langsung diketahui dari tampilan di LCD grafik, data hasil pengukuran bisa disimpan dan alat berukuran kecil sehingga portable, mudah digunakan oleh siapapun dan dimanapun dengan nyaman.Kata kunci: Spirometer, Piezoelektrik, Mikrokontroler, Kapasitas Paru-Paru, LCD Grafik.ABSTRACTAir pollution can be affected the health of the lungs. Generally the measurement of lungs function use a spirometry, performed in the hospital and takes a long time to know the results. To overcome this problem, a portable non-invasive Spirometry is designed using a piezoelectric sensors placed on the chest. The changes of pressure is measured by the piezoelectric sensor are 10 - 80 mV, so it needs a amplifier circuit, filter, clamper, ATMega 32 AVR microcontroller as I/O data processor and LCD graph to display result of measurement and SD card for save the data. This instrument measure lungs vital capacity, respiration rate, and if the measured of lungs vital capacity is less than 80 % of the predicted of lung capacity, then the lung is detected unhealthy. The result of testing indicated that the percentage of success value of instrument is 95,70 %, the results of measurements and detection of lung conditions can be directly know from the view in LCD graphs, measurement data can be saved and size of instrument is small so portable, easy to use by anyone and anywhere with comfortably.Keywords: Spirometry, Piezoelectric, Microcontroller, Lungs Capacity, LCD Graphic.

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Chen, Yingxu, Jie Gao, Xiaoling Yao, Kai Yan, and Jingdong Zhang. "A portable signal-on self-powered aptasensor for ultrasensitive detection of sulfadimethoxine based on dual amplification of a capacitor and biphotoelectrodes." Chemical Communications 57, no. 30 (2021): 3700–3703. http://dx.doi.org/10.1039/d1cc00730k.

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Wang, Si Yuan, Xing Qun Zhao, and Ling Xia. "The Realization of Portable Ultrasonic TOFD Imaging and Detecting System." Advanced Materials Research 798-799 (September 2013): 651–55. http://dx.doi.org/10.4028/www.scientific.net/amr.798-799.651.

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This paper introduced the design of a portable ultrasonic TOFD imaging and detecting system, and developed the hardware and application software based on embedded system. We accomplished multi-channel ultrasonic transmission and acquisition, real time A-scan signal or TOFD image display, ultrasonic data storage and analysis of large capacity and automatic quantitative calculation of cracks in this system. This system offered rapid speed and high accuracy that could be used to locate and size cracks in both weld joint detection and field structure examination.

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Liu, Fang, Wen Ming Cheng, and Lan He. "Finite Element Analysis of Portable Exoskeleton Based on Ergonomics Parameters Model." Applied Mechanics and Materials 215-216 (November 2012): 168–73. http://dx.doi.org/10.4028/www.scientific.net/amm.215-216.168.

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Improvement of Weight capacity and weight-bearing exercise endurance in human are the main purpose of Portable Exoskeleton. The object of study is the Exoskeletons mechanical structure and through it to improve the structure bearing capacity. Firstly, this study takes the data of Chinese adult body size as the related parameters in ergonomics of Exoskeleton. Also the ergonomics parameters of pivotal bearing parts such as hip, thighs and legs will be confirmed according to the 50 percentage data of the data of Chinese adult body size. Based on it, 3D model of Portable Exoskeleton have been established by using Solidworks software and fast assembly of Exoskeleton’s parts have been accomplished. At the same time 3D Model have been conversed the x_t format and to be guided into the ANSYS software. A finite element based strength analysis of the mechanical structure of the external skeletal is then achieved with the load being 800N and the operating condition being one-leg standing. The numerical results show that key parts of the external skeletal meet the requirements. The maximum stress value is 127Mpa by ignoring the stress concentration phenomenon, confirming the reasonability of the structure design. Nevertheless, stress value on exoskeleton joints exceeds the material strength, some suggestions are then proposed on joint design.

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Susanto, Herry, Roy Hendroko Setyobudi, Syukri Muhammad Nur, Erkata Yandri, Aep Saepul Uyun, Abubakar Yaro, Kamaruddin Abdullah, Satriyo Krido Wahono, Juris Burlakovs, and Yogo Adhi Nugroho. "Development of Moving Equipment for Fishermen’s Catches using the Portable Conveyor System." E3S Web of Conferences 190 (2020): 00014. http://dx.doi.org/10.1051/e3sconf/202019000014.

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Indonesia is an archipelago that has a wealth of marine fish resources, and the country with the second-longest coastline in the world. The improvement witnessed in the economy of Indonesia in recent years, is as a result of the growth experienced in various sectors, among which is the fisheries and marine. To overcome this problem, a portable conveyor system of moving equipment for fishermen’s catches was designed. It can be placed at the dock or port where the fishermen are anchored and unloading the fishermen’s catches from the sea. It designed to have the ability to move up and down in the moving frame, making this conveyor system can be used both in high tides and low tides of seawater level conditions. The advantage of this portable conveyor system is could be done continuously with a little human power. Other than that, from the results of the calculations, known that with increasing motor rotation, the required traveling time will only become shorter. The resulting conveyor capacity shows an increase. Also, it can use drive motors that are available on the market with a power capacity of 0.37 kW. Therefore, the process of this portable conveyor system can be more efficient.

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Tian, Xiaochao, Jinzhi Zhu, Zhicong Wang, Hu Wang, Yuze Sun, HaiGang Wang, Sida Zhang, and Zhigang Yang. "Influence of the Power Generation Capacity of the Structural Parameters of a Piezoelectric Bimorph." Shock and Vibration 2021 (July 14, 2021): 1–7. http://dx.doi.org/10.1155/2021/8960671.

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With the popularization of integrated circuits, MEMS, and portable electronic devices, chemical batteries have many disadvantages as the main energy supply method, such as large size, high quality, and limited energy supply life, requiring regular replacement, resulting in waste of materials, environmental pollution, and other issues. From the above reasons, energy harvesting technology plays an important role in improving the efficiency and life of electronic equipment. In order to explore the influence of the bimorph piezoelectric vibrator’s structural parameters on the power generation capacity, this paper establishes a cantilever beam rectangular bimorph piezoelectric vibrator power generation model, derives the mathematical expression of the bimorph piezoelectric vibrator power generation, and determines the parameter factors that affect the power generation effect. Using MATLAB simulation analysis to obtain the influence relationship curve of system output voltage and structural parameters, the experiment tests the influence law of output voltage and thickness ratio, width-to-length ratio, and Young’s modulus ratio; the test results are consistent with the theoretical analysis, verifying the theory and the correctness of the analysis. The results show that when the thickness ratio is 0.58 and the width-to-length ratio is 1, the power generation effect of the piezoelectric vibrator is the best to reach 14.5V; the power generation capacity of the transducer is inversely proportional to Young’s modulus ratio. This research provides a new idea for the popularization of integrated circuits, MEMS, and portable electronic devices.

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Looten, Vincent. "Les études portant sur les bases de données médico-administratives sont-elles reproductibles ?" médecine/sciences 35, no. 8-9 (August 2019): 689–92. http://dx.doi.org/10.1051/medsci/2019134.

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La reproductibilité méthodologique fait référence à la capacité à obtenir exactement les mêmes résultats, en reproduisant le même protocole d’étude sur les mêmes données. Nous avons voulu évaluer la reproductibilité méthodologique des études publiées entre 2008 et 2017 dans la Revue d’épidémiologie et de santé publique, qui font appel à des données issues du système national des données de santé. Nos résultats suggèrent que seules 49 % des études portant sur ce système national pourraient être reproduites sans le recours aux auteurs initiaux. L’absence de partage systématique des programmes peut révéler un manque de préoccupation quant à la finalité de la recherche en santé publique. Il est difficile d’attribuer la responsabilité de ce manque de reproductibilité aux seuls chercheurs, et nous faisons donc l’hypothèse d’une inconduite éthique instituée.

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Carvalho, J. P., H. Lehmann, H. Bartelt, F. Magalhães, R. Amezcua-Correa, J. L. Santos, J. Van Roosbroeck, F. M. Araújo, L. A. Ferreira, and J. C. Knight. "Remote System for Detection of Low-Levels of Methane Based on Photonic Crystal Fibres and Wavelength Modulation Spectroscopy." Journal of Sensors 2009 (2009): 1–10. http://dx.doi.org/10.1155/2009/398403.

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In this work we described an optical fibre sensing system for detecting low levels of methane. The properties of hollow-core photonic crystal fibres are explored to have a sensing head with favourable characteristics for gas sensing, particularly in what concerns intrinsic readout sensitivity and gas diffusion time in the sensing structure. The sensor interrogation was performed applying the Wavelength Modulation Spectroscopy technique, and a portable measurement unit was developed with performance suitable for remote detection of low levels of methane. This portable system has the capacity to simultaneously interrogate four remote photonic crystal fibre sensing heads.

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Vo, Luan Nguyen Quang, Andrew Codlin, Thuc Doan Ngo, Thang Phuoc Dao, Thuy Thi Thu Dong, Huong Thi Lan Mo, Rachel Forse, et al. "Early Evaluation of an Ultra-Portable X-ray System for Tuberculosis Active Case Finding." Tropical Medicine and Infectious Disease 6, no. 3 (September 4, 2021): 163. http://dx.doi.org/10.3390/tropicalmed6030163.

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X-ray screening is an important tool in tuberculosis (TB) prevention and care, but access has historically been restricted by its immobile nature. As recent advancements have improved the portability of modern X-ray systems, this study represents an early evaluation of the safety, image quality and yield of using an ultra-portable X-ray system for active case finding (ACF). We reported operational and radiological performance characteristics and compared image quality between the ultra-portable and two reference systems. Image quality was rated by three human readers and by an artificial intelligence (AI) software. We deployed the ultra-portable X-ray alongside the reference system for community-based ACF and described TB care cascades for each system. The ultra-portable system operated within advertised specifications and radiologic tolerances, except on X-ray capture capacity, which was 58% lower than the reported maximum of 100 exposures per charge. The mean image quality rating from radiologists for the ultra-portable system was significantly lower than the reference (3.71 vs. 3.99, p < 0.001). However, we detected no significant differences in TB abnormality scores using the AI software (p = 0.571), nor in any of the steps along the TB care cascade during our ACF campaign. Despite some shortcomings, ultra-portable X-ray systems have significant potential to improve case detection and equitable access to high-quality TB care.

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Iqbal, Amjad, Omar A Saraereh, Amal Bouazizi, and Abdul Basir. "Metamaterial-Based Highly Isolated MIMO Antenna for Portable Wireless Applications." Electronics 7, no. 10 (October 22, 2018): 267. http://dx.doi.org/10.3390/electronics7100267.

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In this paper, a metamaterial structure is presented to lower the mutual coupling between the closely spaced microstrip patch antenna elements. Two elements Multiple Input Multiple Output (MIMO) antenna is closely placed with each other at edge to edge separation of 0.135 λ 0 (7 mm). Isolation improvement of 9 dB is achieved by keeping the metamaterial structure in between the MIMO elements. With the proposed structure, the isolation is achieved around −24.5 dB. Due to low ECC, high gain, low channel capacity loss and very low mutual coupling between elements, the proposed antenna is a good candidate for the MIMO applications. The proposed antenna is fabricated and tested. A reasonable agreement between simulated and measured results is observed.

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YAMANAKA, Minoru, Hirohiko IWAHARA, and Norio NAKAYAMA. "Laboratory and Field Tests on Performance Evaluation of Portable Test Device for Bearing Capacity of Ground." Journal of the Society of Materials Science, Japan 63, no. 1 (2014): 15–20. http://dx.doi.org/10.2472/jsms.63.15.

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Yoshida, T. "Apparatus for detecting a remaining capacity of a battery in a portable data transmission/reception device." Journal of Power Sources 70, no. 1 (January 30, 1998): 152. http://dx.doi.org/10.1016/s0378-7753(97)84071-2.

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46

Deschamps, Kevin, and Benjamin Messier. "Pressure reducing capacity of felt: A feasibility study using a new portable system with thin sensors." Diabetes Research and Clinical Practice 107, no. 3 (March 2015): e11-e14. http://dx.doi.org/10.1016/j.diabres.2015.01.007.

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Mamyrbayeva, Y. Y., R. E. Beissenov, M. A. Hobosyan, S. E. Kumekov, and K. S. Martirosyan. "Charge and Discharge Behaviour of Li-Ion Batteries at Various Temperatures Containing LiCoO2 Nanostructured Cathode Produced by CCSO." Eurasian Chemico-Technological Journal 15, no. 4 (November 3, 2015): 301. http://dx.doi.org/10.18321/ectj235.

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<p>There are technical barriers for penetration market requesting rechargeable lithium-ion battery packs for portable devices that operate in extreme hot and cold environments. Many portable electronics are used in very cold (-40 °C) environments, and many medical devices need batteries that operate at high temperatures. Conventional Li-ion batteries start to suffer as the temperature drops below 0 °C and the internal impedance of the battery increases. Battery capacity also reduced during the higher/lower temperatures. The present work describes the laboratory made lithium ion battery behaviour features at different operation temperatures. The pouch-type battery was prepared by exploiting LiCoO<sub>2</sub> cathode material synthesized by novel synthetic approach referred as Carbon Combustion Synthesis of Oxides (CCSO). The main goal of this paper focuses on evaluation of the efficiency of positive electrode produced by CCSO method. Performance studies of battery showed that the capacity fade of pouch type battery increases with increase in temperature. The experimental results demonstrate the dramatic effects on cell self-heating upon electrochemical performance. The study involves an extensive analysis of discharge and charge characteristics of battery at each temperature following 30 cycles. After 10 cycles, the battery cycled at RT and 45 °C showed, the capacity fade of 20% and 25% respectively. The discharge capacity for the battery cycled at 25 °C was found to be higher when compared with the battery cycled at 0 °C and 45 °C. The capacity of the battery also decreases when cycling at low temperatures. It was important time to charge the battery was only 2.5 hours to obtain identical nominal capacity under the charging protocol. The decrease capability of battery cycled at high temperature can be explained with secondary active material loss dominating the other losses.</p>

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Richir, T., J. P. Radu, and R. Charlier. "Comparaison de plusieurs modes de prise en compte de la sécurité dans la vérification de la capacité portante ultime des fondations superficielles." Revue Française de Géotechnique, no. 113 (2005): 11–29. http://dx.doi.org/10.1051/geotech/2005113011.

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Alfian. "Rancangan Teknologi Tepat Guna untuk Mesin Penggiling Kopi Sistim Poros Vertikal." Jurnal Ilmiah Poli Rekayasa 9, no. 2 (April 16, 2018): 11. http://dx.doi.org/10.30630/jipr.13.2.85.

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Coffee is material of drink and coffee income for Indonesia Country. Each one of coffee proses for drink is grind proses. Grind coffee proses influence of taste and confortable. The grind coffee prosesto produce powder, natural aroma, big capacity, easily found, estetika, and economic value. From research, hoper the grind coffee machine is the produce coffee powder, natural aroma, capacity, small power electrical, portable, estetika and economic value.In this paper Grinder Coffee Machine Vertical Shaft System, to produce grinder with Conical Burr Grinder so natural aroma, powder smoot and same size. The specification this machine is power 0.5 HP, motor rotation 500 rpm, size 300mm x 300mm x 470mm and capacity produce 106 kg/hour.

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Li, Yuxuan, Jie Yin, Li An, Min Lu, Ke Sun, Yong-Qing Zhao, Fangyi Cheng, and Pinxian Xi. "Metallic CuCo2S4 nanosheets of atomic thickness as efficient bifunctional electrocatalysts for portable, flexible Zn-air batteries." Nanoscale 10, no. 14 (2018): 6581–88. http://dx.doi.org/10.1039/c8nr01381k.

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A portable, flexible Zn-air battery using CuCo₂S₄ NSs as the air-cathode displays a high open circuit voltage and strong rechargeable capacity due to the excellent reversible oxygen catalytic performance of metallic CuCo₂S₄ NSs of atomic thickness with abundant defects.

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