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Letteratura scientifica selezionata sul tema "Breathing apparatus"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 31 luglio 2024

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Articoli di riviste sul tema "Breathing apparatus"

1

Setty, B. V. S., G. S. N. Murthy, K. Thammaiah e T. Lazar Mathew. "Underwater Breathing Apparatus". Defence Science Journal 46, n. 3 (1 gennaio 1996): 155–60. http://dx.doi.org/10.14429/dsj.46.4483.

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2

Nomoto, Hiroshi. "Self-contained Underwater Breathing Apparatus". Journal of the Society of Mechanical Engineers 101, n. 955 (1998): 422–23. http://dx.doi.org/10.1299/jsmemag.101.955_422.

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3

Woźniak, Arkadiusz. "The Influence of the Flushing Method on the Stable Oxygen Content in the Scr1 Crabe Breathing Loop in the Decompression Phase". Polish Hyperbaric Research 70, n. 1 (1 marzo 2020): 21–42. http://dx.doi.org/10.2478/phr-2020-0002.

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AbstractMaintaining a stable oxygen content in the breathing loop of the diving apparatus with a semi-closed respiratory circuit is essential for the safety of underwater mine clearance operations. This article discusses the influence of modified methods of flushing the breathing apparatus on the quality of the breathing loop ventilation process. The problem of flushing an apparatus is presented in light of the Polish Naval Academy’s change from statistical to deterministic decompression schedules, based on the model of apparatus ventilation, oxygen toxicity hazard and decompression. The examination and determination utilising the required accuracy of the method used for flushing the breathing loop of the device allowed to assess the stable oxygen content during the decompression phase. The assumptions were verified based on a system for measuring oxygen content in the breathing loop.

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4

Haponenko, H., R. Melnyk, I. Horchynskiy, A. Karshen, Yu Ftemov e O. Lischinskyy. "Design features of underwater breathing apparatus". Military Technical Collection, n. 27 (30 novembre 2022): 65–74. http://dx.doi.org/10.33577/2312-4458.27.2022.65-74.

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The problem of finding and disposing of explosive objects in the water areas of seas and rivers that remain as a result of hostilities on the territory of our country is urgent and requires appropriate technical equipment. The technical support (equipment) for performing underwater work, which is in service with the Armed Forces of Ukraine, is outdated and can pose a threat to the life and health of sapper divers during the performance of complex combat tasks on a regular basis. One of the pressing issues today is the transition of the Armed Forces of Ukraine to NATO standards. Taking this into account, the issue of not only transitioning to international standards that regulate the processes of development, planning, testing, operation, repair or modernization of weapons and equipment, but also the preservation of the lives of personnel during combat missions is an urgent issue. Accordingly, the search for ways to increase the safety of military personnel during diving descents with explosive work is relevant. The purpose of the study is to analyze the possibility of making structural changes in underwater breathing apparatus (UBA) with an open breathing circuit of the ABA type and to evaluate the effectiveness of the changes made using a composite efficiency index. The types of UBAs with an open breathing circuit of the ABA type are analyzed, the main advantages and disadvantages of UBAs with open, semi-closed and closed circuits of gas supply for breathing are indicated. The principlescheme of the UBA type ABA was considered and constructive solutions were proposed to increase the safety of diving descents and works. Introducing a fundamentally different design of the reducer and the reserve air supply valve into the design scheme will provide an opportunity to control the air supply in the UBA, increase the safety of diving descents and work. The proposed changes in the design will improve the safety of diving descents and underwater work. The obtained results can be used in further scientific research in the direction of modernization and development of promising means of diving equipment.

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5

Verešová, Tatiana, Jozef Svetlík e Dávid Kalužník. "VERIFICATION OF TACTICAL AND TECHNICAL DATA OF THE BREATHING APPARATUS". Proceedings of CBU in Natural Sciences and ICT 2 (24 ottobre 2021): 100–104. http://dx.doi.org/10.12955/pns.v2.160.

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The function of the breathing apparatus is to protect the health of firefighters in a harmful and non-respirable environment. Closed-circuit breathing apparatus provides members of the Fire and Rescue Service with respiratory protection in the elimination of adverse events in tunnels and underground spaces. The MSA 4h Air Elite is a four-hour self-contained breathing apparatus that operates on the principle of generating oxygen by an exothermic reaction of potassium hyperoxide. Each breathing apparatus has its tactical technical parameters. We verified the tactical and technical data of the MSA AIRE ELITE by the experiment they participated in the firefighter. Each firefighter was equally coupled. An MSA Air Elite was used during the experiment. Tactical-technical data reported by the manufacturer varies in some points with the practical results that we have managed to obtain. The manufacturer's largest deviations in tactical and technical data and practical results are mainly in the length of work activity, temperature in use in intervention, and air consumption. According to our experiment, the MSA 4h Air Elite breathing apparatus does not last in the working activity 240 minutes as it discloses a manufacturer, but on the other hand, this time-inconsistency may be caused by the intensity of training and demanding of the training track.

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6

Kłos, Ryszard. "Modelling of Diving Apparatus Breathing Loop Ventilation". Solid State Phenomena 210 (ottobre 2013): 97–107. http://dx.doi.org/10.4028/www.scientific.net/ssp.210.97.

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The article is based on hypothesis that it is possible to establish the adequate joined mathematical model for ventilation of breathing space (for assessing of artificial breathing mixture real composition) and human decompression after breathing artificial hyperbaric atmosphere. In the effect of establishing mathematical model give the chance to understand gas exchange in human body exposed to pressure. It makes possible to plane extreme hyperbaric expositions (e.g. military special operations) and stimulates progress in the field of anaesthesiology. There is presented scientific project proposal.

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Kłos, Ryszard. "Classification of the underwater diving equipment". Polish Maritime Research 15, n. 1 (1 gennaio 2008): 80–85. http://dx.doi.org/10.2478/v10012-007-0056-3.

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Classification of the underwater diving equipment In this paper was presented, innovative in preparation of the diving apparatuses classification method, depend on three criteria: the kind of the breathing gas, the operational depth range of the diving apparatus, and the principle of operation. The breathing gas used is the most important criterion. The other basic classification criteria follow from the first one; therefore it should be treated as the one criterion. Such approach to the problem has never been presented before, however it seems to be correct method of the diving apparatuses division.

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8

Hu, Hai Bing, Jin Sheng Wang, Hao He, Gao Hua Lin e Yong Ming Zhang. "Wireless Warning System of Positive Pressure SCBA Based on GPRS". Applied Mechanics and Materials 496-500 (gennaio 2014): 1702–6. http://dx.doi.org/10.4028/www.scientific.net/amm.496-500.1702.

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Ordinary positive pressure breathing apparatus only supply the air to firefighters within a certain time, and cannot help to realize the real-time control of the service status of the apparatus, leading to the existence of security risks. In this study, a wireless early warning system of positive pressure breathing apparatus was proposed in response to the actual demand of the fire force based on a combination of GPRS communication technologies, intelligent prediction algorithm of the breathing apparatus, and network-based programming technologies. The system features strong applicability and small error (a working error of ±6%), and thus can satisfy the demand of enhancing the safety guarantee for firefighters on the fire-fighting and rescue scene and is of significant application value.

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9

Bänziger, Fritz A., e Peter Klein. "Speaking and hearing system for breathing apparatus". Journal of the Acoustical Society of America 88, n. 6 (dicembre 1990): 2922. http://dx.doi.org/10.1121/1.399590.

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10

Lampotang, Samsun. "Apparatus and method of simulating breathing sounds". Journal of the Acoustical Society of America 105, n. 2 (1999): 588. http://dx.doi.org/10.1121/1.427016.

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Più fonti

Tesi sul tema "Breathing apparatus"

1

Abkowitz, David. "Designing to increase user acceptance of respiratory protection /". Online version of thesis, 1989. http://hdl.handle.net/1850/11298.

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2

Karanjikar, Mukund R. Tatarchuk Bruce J. "Low temperature oxidation of carbon monoxide using microfibrous entrapped catalysts for fire escape mask application". Auburn, Ala., 2005. http://hdl.handle.net/10415/1276.

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3

Culp, Kevin W. "Determining organic vapor cartridge breakthrough characteristics of JP-8 during aircraft fuel tank entry operations". Morgantown, W. Va. : [West Virginia University Libraries], 2000. http://etd.wvu.edu/templates/showETD.cfm?recnum=1528.

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Thesis (M.S.)--West Virginia University, 2000.
Title from document title page. Document formatted into pages; contains xiii, 157 p. : ill. (some col.) Includes abstract. Includes bibliographical references (p. 84-86).

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4

Bardsley, Sally Martinsen. "Evaluation of transient cognitive changes from maximal exertion and respirator wear". Diss., [Missoula, Mont.] : The University of Montana, 2010. http://etd.lib.umt.edu/theses/available/etd-04222010-191946.

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5

Bruce-Low, Stewart Saunders. "Physiological responses of fire service training instructors to live fire training". Thesis, University of Liverpool, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.269591.

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6

Murphy, Richard Wright 1958. "Quantitative respirator fit testing by negative pressure". Thesis, The University of Arizona, 1989. http://hdl.handle.net/10150/276947.

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An automated system for quantitative respirator fit testing by negative pressure was evaluated by comparison testing with a computerized aerosol fit test system (Dynatech Frontier Model 260A). The new negative pressure system measures leakage flow while inspiratory pressures are sustained in a respirator facepiece rather than by pressure decay. Four phases of comparison testing were graduated by level of control, ranging from non-subject tests with hypodermic needle leakages to fit tests of 125 Air Force personnel. Throughout the series of tests, negative pressure fit factors were consistently more conservative than aerosol fit factors and showed less variability. Leakage flow rates measured by the negative pressure instrument were highly correlated with leak needle cross-sectional area as predicted by principles of air-flow physics. Comparison of subject and non-subject generated aerosol fit factors indicated significant aerosol losses, possibly due to streamlining and respiratory tract deposition. Negative pressure fit factors were not affected by these subject-related losses.

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Eroh, Martin Patrick 1962. "DEVELOPMENT OF A NEW QUANTITATIVE FIT TEST FOR CHEMICAL CARTRIDGE RESPIRATORS - A FEASIBILITY STUDY (PRESSURE)". Thesis, The University of Arizona, 1986. http://hdl.handle.net/10150/276782.

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Warlick, Kathleen Marie 1956. "Synchronized high frequency jet ventilation during extracorporeal shock wave lithotripsy". Thesis, The University of Arizona, 1988. http://hdl.handle.net/10150/276694.

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Physiologic and Extracorporeal Shock Wave Lithotripsy (ESWL) data were collected before, during and after ESWL from four patient groups employing different anesthetic techniques (epidural anesthesia, general anesthesia with low-volume conventional mechanical ventilation or with unsynchronized high frequency jet ventilation (HFJV) or with HFJV synchronized to the heart rate). The primary goal was to determine if synchronized HFJV had any beneficial effects. A synchronization unit was fabricated that triggered one HFJV breath, per heart beat, delivered 30 milliseconds after the shock wave. This allowed only expiratory motion during shock wave administration. Results were analyzed using one-way analysis of variance, Students t-tests and chi-square tests with significance at p 0.05. Results showed that renal stone excursion was significantly less in HFJV groups and that significantly more patients required re-treatment in non-HFJV groups. No results indicated that synchronizing HFJV had any further benefits than unsynchronized HFJV.

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Lo, Julian Kwan Wa. "Mathematical modelling of mixed gas breathing equipment and associated systems". Thesis, University of Bath, 1995. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.296315.

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10

Boothe, Gregory David 1956. "Exercise protocols and their effects on quantitative respirator fit tests". Thesis, The University of Arizona, 1989. http://hdl.handle.net/10150/277122.

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A negative pressure quantitative fit testing device was used to test the effect exercise protocol has on leakage rates into a negative pressure respirator. Modified exercise protocols were developed for use with the negative pressure system. Aerosol data was analyzed to determine the effect exercises have had on leakage rates using other QNFT systems. Results show that the position of the head affects the amount of leakage into the facepiece. Mean leakage into the respirator mask increased for all positions tested in one phase of the study. However, statistical analysis of the data showed that the increase was not statistically significant. Aerosol data analysis also showed that increases in leakage into the mask were not statistically significant. Conclusions drawn from this study are that although movement of the head may affect the leakage into a respirator it is not significant enough to alter the protection afforded the worker.

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Libri sul tema "Breathing apparatus"

1

International Fire Service Training Association., a cura di. Self-contained breathing apparatus. 2^a ed. Stillwater, OK: Fire Protection Publications, Oklahoma State University, 1991.

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2

Perth (W.A.). Bush Fires Board., a cura di. Performance standards for breathing apparatus operators. Perth [W.A.]: Bush Fires Board, 1992.

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3

Great Britain. Fire and Emergency Planning Directorate. Breathing apparatus: Command and control procedures. London: HMFSI/Stationery Office, 1997.

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4

United States. Occupational Safety and Health Administration. Small entity compliance guide for the respiratory protection standard. [Washington, D.C.]: U.S. Dept. of Labor, 2011.

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5

Ireland. Dept. of the Environment., a cura di. The use of breathing apparatus in the fire service. Dublin: Stationery Office, 1995.

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6

Mattorano, Dino A. Torch Operating Company, Santa Maria, California. [Atlanta, Ga.?]: U.S. Dept. of Health and Human Services, Public Health Service, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, 1998.

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7

Mattorano, Dino A. Torch Operating Company, Santa Maria, California. [Atlanta, Ga.?]: U.S. Dept. of Health and Human Services, Public Health Service, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, 1998.

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8

Lettnin, Heinz K. J. Tauchen mit Mischgas: Theorie, Technik, Anwendung. Berlin: Springer-Verlag, 1991.

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9

Bollinger, Nancy J. NIOSH guide to industrial respiratory protection. Cincinnati, Ohio: U.S. Dept. of Health and Human Services, Public Health Service, Centers for Disease Control, National Institute for Occupational Safety and Health, Division of Safety Research, 1987.

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10

Mattorano, Dino A. Torch Operating Company, Santa Maria, California. [Atlanta, Ga.?]: U.S. Dept. of Health and Human Services, Public Health Service, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, 1998.

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Capitoli di libri sul tema "Breathing apparatus"

1

Tarmey, C. "Standards for Underwater Breathing Apparatus". In Advances in Underwater Technology, Ocean Science and Offshore Engineering, 89–100. Dordrecht: Springer Netherlands, 1988. http://dx.doi.org/10.1007/978-94-009-1299-1_11.

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Singleton, John. "Breathing Apparatus for Mine Rescue in the UK, 1890s–1920s". In Standard of Living, 373–93. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-06477-7_17.

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3

"breathing apparatus". In Dictionary Geotechnical Engineering/Wörterbuch GeoTechnik, 163. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-41714-6_23206.

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4

"breathing apparatus, n." In Oxford English Dictionary. 3^a ed. Oxford University Press, 2023. http://dx.doi.org/10.1093/oed/1117102607.

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5

Sinton, Jamie W. "Apparatus and Breathing Circuits". In Advanced Anesthesia Review, a cura di Alaa Abd-Elsayed, 567—C219.S13. Oxford University PressNew York, 2023. http://dx.doi.org/10.1093/med/9780197584521.003.0218.

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Abstract Breathing circuit apparatus choice for infants and children is often pragmatic. It relies on ability to maintain heat and humidity while minimizing work of breathing required to sustain normocarbia. This chapter discuss breathing circuits as they apply to neonatal and pediatric patients. Circle systems conserve heat and humidity at the potential expense of volume loss to the circuit and errant delivery of dangerous tidal volumes. Meanwhile, the Jackson-Rees circuit minimizes work of breathing during spontaneous respiration but predisposes to airway desiccation and heat loss. Finally, infant t-piece resuscitators effectively minimize dead space but carry the risk of breath stacking and inaccuracy of tidal volume delivery.

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Hemsley, Thomas. "Breath". In Singing and Imagination, 97–108. Oxford University PressOxford, 1998. http://dx.doi.org/10.1093/oso/9780198790150.003.0010.

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Abstract It is essential, of course, for the singer ‘s breathing apparatus to be in good working order. It is necessary, particularly at a time when bad postural and breathing habits are so widespread, to have exercises at our disposal which can help to ensure that this is so; but it is also important to realize that the sort of breathing designed specifically for exercising and developing the breathing apparatus is not the same as that needed for singing. There are many ways of breathing, appropriate to different human activities; and it is important that the breathing should adjust spontaneously to the activity in question. In ordinary quiet respiration, which can be observed in, say, a sleeping child, the breathing is predominantly what is called ‘abdominal ‘ (although of course it is nothing of the sort-the term ‘abdominal breathing ‘ indicates diaphragm breathing with minimal expansion of the ribs), whereas in vigorous, voluntary activities, such as singing, public speaking, athletic pursuits, or in a howling infant, intercostal and clavicular breathing also come into play. That means expanding and raising the chest.

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Bahadori, Alireza. "Breathing apparatus for personnel safety and protection". In Personnel Protection and Safety Equipment for the Oil and Gas Industries, 1–34. Elsevier, 2015. http://dx.doi.org/10.1016/b978-0-12-802814-8.00001-8.

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Diffrient, David Scott. "Dead, But Still Breathing". In Body Genre, 137–68. University Press of Mississippi, 2023. http://dx.doi.org/10.14325/mississippi/9781496847966.003.0006.

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Breathing is an implicit, rarely remarked-upon bodily phenomenon in cinema. Indeed, one of the most undertheorized yet taken-for-granted aspects of the motion picture medium, which makes an ontological break from still photography by presenting viewers with the illusion of movement, is its capacity to forge an intersubjective bond between the living, breathing bodies of characters (as well as the actors who play them) and the embodied spectator whose own respiratory activity is as key to phenomenological engagement or sensual perception as seeing and hearing are. Building upon the work of Davina Quinlivan, this chapter explores some of the ways that breath can paradoxically sever a viewer’s link to that apparatus and draw her or his attention to the fictionality of a narrative. This is particularly true in horror films, where actors are frequently asked to perform “fake deaths” and the themes of mortality, physical trauma, and supernatural survival figure prominently. Those themes are lent visual texture not only through graphic representations of the body’s destruction and the taking of one’s “last breath,” but also in the sexually suggestive way that women’s breasts (or heaving chests) are lingered on by filmmakers whose predilection for “base” material is echoed in their narratives’ gravitation toward basements and other underground settings.

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Cressy, David. "Deep Recovery". In Shipwrecks and the Bounty of the Sea, 215—C11.P57. Oxford University PressOxford, 2022. http://dx.doi.org/10.1093/oso/9780192863393.003.0012.

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Abstract Shoreline recovery extended as far into the sea as horsemen could reach with long poles. Salvagers worked with hooks and grapples in the waves. Anything deeper was lost, unless engines could be devised or divers could be found to descend. This chapter examines the organizational and technical challenges involved in the recovery of shipwrecked material from seas deeper than shoremen could reach. It tells the story of underwater recovery, from the daring free divers of the sixteenth century employed to locate anchors and cannons, to the enterprising syndicates of the late Stuart period using breathing apparatus to retrieve silver bullion. Most of this book treats shipwrecks as social dramas at the juncture of land and sea; here they are also considered as sites, in the archaeological sense, from which maritime bounty could be recovered by inventors and investors.

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Perry, Steven F., Markus Lambertz e Anke Schmitz. "Respiratory faculties of aquatic craniotes". In Respiratory Biology of Animals, 125–38. Oxford University Press, 2019. http://dx.doi.org/10.1093/oso/9780199238460.003.0011.

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This chapter introduces the ‘who has what’ in terms of water-breathing respiratory faculties for craniotes. A branchial basket and a ventral heart or hearts that perfuse the branchial region with deoxygenated internal fluid is part of the bauplan of all chordates, including craniotes. Cilia ventilate the branchial region of extant non-craniote chordates, which are also predominantly sessile or planktonic filter feeders. In craniotes, the gills are the main gas exchange organs. They are ventilated by muscular activity and perfused with blood that contains haemoglobin in erythrocytes and flows in the opposite direction to the ventilated water (counter-current model). In spite of major differences in the structure of gills and the ventilatory apparatus among jawless craniotes, cartilaginous fish, and bony fish, the basic push–pull, constant, unidirectional flow respiratory mechanism remains unchanged (of course, with a few notable exceptions). In addition, both the blood and the structure of the gills may reflect adaptations of the respiratory faculty to habitual living conditions.

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Atti di convegni sul tema "Breathing apparatus"

1

Gibbs, Peter Nicholas. "Compressed Air Breathing Apparatus for Helicopter Underwater Evacuation". In Offshore Technology Conference. Offshore Technology Conference, 2008. http://dx.doi.org/10.4043/19269-ms.

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2

Puttiger, P. H. J. "Stress and Strain Wearing Compressed Air-Breathing Apparatus". In SPE Health, Safety and Environment in Oil and Gas Exploration and Production Conference. Society of Petroleum Engineers, 1991. http://dx.doi.org/10.2118/23193-ms.

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Donskoy, D., L. Imas, T. Yen, N. Sedunov, M. Tsionskiy, A. Sedunov, Bengt Enflo, Claes M. Hedberg e Leif Kari. "Turbulence-Induced Acoustic Emission of SCUBA Breathing Apparatus". In NONLINEAR ACOUSTICS - FUNDAMENTALS AND APPLICATIONS: 18th International Symposium on Nonlinear Acoustics - ISNA 18. AIP, 2008. http://dx.doi.org/10.1063/1.2956311.

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4

Garofalo, Franco, Sabato Manfredi e Stefania Santini. "Modelling and control of oxygen partial pressure in an underwater breathing apparatus with gas recycle". In 2003 European Control Conference (ECC). IEEE, 2003. http://dx.doi.org/10.23919/ecc.2003.7085067.

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5

Xu, Susan, Rachel F Jones, Neethan Ratnakumar, Kübra Akbaş, Jeffrey Powell, Ziqing Zhuang e Alex Zhou. "Impact of Self-Contained Breathing Apparatus (SCBA) Weights on Firefighter’s Kinematics During Simulated Firefighter Tasks". In 15th International Conference on Applied Human Factors and Ergonomics (AHFE 2024). AHFE International, 2024. http://dx.doi.org/10.54941/ahfe1004872.

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Firefighters face a multitude of hazards in their line of duty, with overexertion being the foremost cause of injuries or fatalities, as referenced in studies [1, 2]. This high risk is often amplified by the physical demands of their role, further exacerbated by the burden of carrying heavy SCBA. The objective of this research is to examine how the weight of SCBA affects the musculoskeletal joint movements of firefighters. There is an urgent requirement for precise measurement and analysis of firefighters' movements to understand the impact of SCBA weight on both performance and injury risk. Traditional motion capture techniques, which are primarily optical-based or inertia-based, have their limitations, such as marker obstructions due to clothing or lower accuracy and drift issues. To overcome these obstacles, this study introduces a groundbreaking hybrid motion capture technique, combining the advantages of both existing methods. This new method is expected to offer a detailed and accurate evaluation of how SCBA weight influences the kinematics of firefighters.MethodsIn this study, six professional firefighters (average age: 34.2±5.2 years) were involved in performing four simulated tasks: stair climbing, searching, hose advance, and overhaul, under three different SCBA weight scenarios: only gear, gear with a standard 45-minute SCBA, and gear with an SCBA plus an additional 10 lbs (SCBA-10). Data collection included optical markers on key equipment like helmets, boots, and gloves, 17 IMUs, EMG, pressure insoles, and a metabolic mask. A novel hybrid inverse kinematics method, blending IMU data with optical markers, was utilized to minimize drift errors and precisely reconstruct joint movements. Joint angle data, particularly for hose advance and overhaul, were segmented and normalized for comprehensive statistical analysis. Preliminary Results and DiscussionInitial analysis of data from two human subjects showed that heavier SCBA weights led to increased hip joint movement during stair climbing, with a noticeable 10% increase in hip angle range under the heaviest SCBA condition (SCBA-10). In hose advance tasks, firefighters showed less lumbar extension with SCBA, indicating a preference for using arm movements over the back and torso to maneuver the hose. Traditional inverse kinematics with only markers showed significant errors in joint angles, especially in pelvic tilt and hip flexion, which were effectively corrected with the new hybrid method. This innovative approach allows for a more precise evaluation of the effects of SCBA weight on firefighter kinematics and musculoskeletal load. Additional data is expected soon, which will provide a greater understanding of the effects of SCBA. While our current analysis is based on a small sample, we expect that expanding the study to more participants will reveal further kinematic changes due to loading.Preliminary Conclusions To the best of our knowledge, this research represents the first endeavor to precisely record the movement of firefighters engaged in activities while fully equipped with gear and SCBA using both inertia and optical motion capture systems. Our initial findings validate this method and suggest its potential to refine SCBA weight standards based on scientific evidence. We noted that SCBA's weight substantially modifies the movement patterns of firefighters, possibly increasing musculoskeletal strain. This research paves the way for future dynamic analyses and contributes significantly to understanding how SCBA weight impacts musculoskeletal health, ultimately provide the possibility of recommending SCBA weight limits for injury prevention.DisclaimerThe findings and conclusions in this report are those of the authors and do not necessarily represent the official position of the National Institute for Occupational Safety and Health (NIOSH), Centers for Disease Control and Prevention (CDC).References[1]M. M. Alemi, J. Geissinger, A. A. Simon, S. E. Chang, and A. T. Asbeck, "A passive exoskeleton reduces peak and mean EMG during symmetric and asymmetric lifting," Journal of Electromyography and Kinesiology, vol. 47, pp. 25-34, 2019.[2]M. J. Karter, "Patterns of firefighter fireground injuries," National Fire Protection Association, 2014.[3]S. Wang, C. Feng, X. Chen, M. Shan, and W. Niu, "A biomechanical evaluation of firefighters’ musculoskeletal loads when carrying self-contained breathing apparatus in walking and running," Journal of Safety Research, 2023.

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Obukhov, Artem. "DEVELOPMENT OF A VIRTUAL TRAINING COMPLEX FOR TRAINING PERSONNEL OF INDUSTRIAL ENTERPRISES IN THE RULES OF OPERATION OF INSULATING BREATHING APPARATUS". In 19th SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings. STEF92 Technology, 2019. http://dx.doi.org/10.5593/sgem2019/1.3/s03.028.

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Wang, Jung-Chang, e Yu-Pin Tsai. "Investigations on Scuba Diving Regulators". In ASME 2010 29th International Conference on Ocean, Offshore and Arctic Engineering. ASMEDC, 2010. http://dx.doi.org/10.1115/omae2010-21089.

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The paper utilizes numerical method with performance experiment to investigate the key factors affecting the performance of the Self-Contained Underwater Breathing Apparatus (SCUBA) system. A SCUBA system consists of a high pressure compressed air tank and a pressure regulator. The development of scuba diving is based on the invention of the regulator. The high pressure air carried by diver must be reduced to the pressure in the ambient environment by the regulator before the diver can breathe it. The life of the diver thus depends on the performance and stability of the regulator. Results show that the index performance of regulator can be predicted and used to improve the performance of the regulator. The numerical method can thus effectively reduce the develop time for new regulators and related products, as described in this article.

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Milić, Ivana. "VEŽBE DISANjA U FUNKCIJI RAZVIJANjA POJMA PRIRODNIH BROJEVA". In Metodički aspekti nastave matematike. University of Kragujevac, Faculty of Education in Jagodina, 2021. http://dx.doi.org/10.46793/manm4.225m.

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Today, there are many pedagogical-psychological and methodological research studies which highlight the importance of music education for the further development of preschool children. The goals of music education in preschool institutions, in addition to envisaging the harmonious development of each child and the engagement of his/her entire personality, greatly contribute to the creation of a basis for later musical education. These goals determine the role of music education, which must be multifunctional and achieved through specific activities in integration with other disciplines. Therefore, the paper presents examples of integrating content of music ed- ucation and initial mathematical concepts. Considering that singing children’s songs is one of the most common forms of work in music education, and that is necessary to prepare children’s singing apparatus at the beginning of each activ- ity, the paper presents breathing exercises as a tool for developing the concept of natural numbers.

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Taylor, Donal J., Denis J. Doorly e Robert C. Schroter. "Airflow in the Human Nasal Cavity: An Inter-Subject Comparison". In ASME 2009 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2009. http://dx.doi.org/10.1115/sbc2009-206459.

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The human nose is a remarkably complicated biological conduit that plays a significant, perpetual role in respiratory defense and olfaction. It is not a passive organ and has evolved to balance many conflicting requirements, while processing 10,000 litres of inspired air in a typical day [1]. The highly vascularised nasal mucosa heats and humidifies adjacent airflow, whilst the nasal mucosa collects nearly all particles over 5 μm diameter and approximately 50% of those between 2–4 μm [1]. Furthermore, the nasal airways house the olfactory apparatus, which enables humans to sense (smell) the external environment. The research presented here incorporates Computational Fluid Dynamics (CFD) in conjunction with experimental optical measurement techniques to resolve the patterns of flow within the nasal airways of two healthy subjects. This abstract details the experimental and computational methodologies used to simulate constant inspiration at a rate of 100 ml.s−1, which is representative of quiet restful breathing. The results presented focus on a comparison of the upper airway flow distributions in both subjects.

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PIERCE, TAYLOR, YUN-AN LIN e KENNETH J. LOH. "WIRELESS GAIT AND RESPIRATION MONITORING USING NANOCOMPOSITE SENSORS". In Structural Health Monitoring 2023. Destech Publications, Inc., 2023. http://dx.doi.org/10.12783/shm2023/36963.

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The measurement of posture, loading conditions, and physiological parameters during physical activity is key in human performance monitoring and assessment. Of particular interest in this study is the monitoring of these parameters during high intensity activities associated with firefighting. The objective is to capture various walking cycles using nanocomposite pressure sensors built into the backpack-type harnesses of a Self-Contained Breathing Apparatus (SCBA) unit. It was hypothesized that the sensor’s high stability, linearity, and sensitivity would allow this sensor to be used for human posture and activity monitoring. First, nanocomposite sensors were prepared by integrating piezoresistive graphene nanosheet thin films between elastomer layers. Two sensors were then integrated with the SCBA harnesses and mounted at symmetric locations to capture gait and respiration cycles. Second, a small, portable, wireless data acquisition unit was developed to non-intrusively monitor up to eight sensors and wirelessly transmit the data for external data storage and analysis. This sensing node included analog signal conditioning circuits alongside an ARM based microprocessor for analog to digital conversion, signal processing, and wireless transmission. Third, human participant tests were performed while wearing these harnesses. The participants performed various low intensity walking and respiratory cycles. The results confirmed that the wireless sensing unit was able to reliably acquire sensor measurements, while the sensing streams also exhibited unique features indicative of different activities and postures.

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Rapporti di organizzazioni sul tema "Breathing apparatus"

1

Warkander, Dan E., e Cales E. G. Lundgren. Development of Comprehensive Performance Standards for Underwater Breathing Apparatus. Fort Belvoir, VA: Defense Technical Information Center, gennaio 2000. http://dx.doi.org/10.21236/ada486718.

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Clarke, John R. Optimal Hydrostatic Loading for Closed-Circuit Underwater Breathing Apparatus Design. Fort Belvoir, VA: Defense Technical Information Center, marzo 1991. http://dx.doi.org/10.21236/ada234290.

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3

Clarke, J. R. Statistically Based CO2 Canister Duration Limits for Closed-Circuit Underwater Breathing Apparatus. Fort Belvoir, VA: Defense Technical Information Center, aprile 1999. http://dx.doi.org/10.21236/ada362566.

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Knafelc, M. E. Physiologic Basis for CO2 Limits Within Semiclosed and Closed-Circuit Underwater Breathing Apparatus. Fort Belvoir, VA: Defense Technical Information Center, agosto 2000. http://dx.doi.org/10.21236/ada383684.

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Keuski, Brian M., e David J. Doolette. Manned Certification Evaluation of the Innerspace Systems (registered trademark) Megalodon Underwater Breathing Apparatus. Fort Belvoir, VA: Defense Technical Information Center, dicembre 2010. http://dx.doi.org/10.21236/ada549996.

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Putorti Jr, Anthony, Amy Mensch, Nelson Bryner e George Braga. Thermal Performance of SelfContained Breathing Apparatus Facepiece Lenses Exposed to Radiant Heat Flux. National Institute of Standards and Technology, febbraio 2013. http://dx.doi.org/10.6028/nist.tn.1785.

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Hedricks, C. S., e S. J. Stanek. Evaluation of the KMS 48 Replacement Full Face Mask with the Emergency Breathing System for Use with MK 16 MOD 1 Underwater Breathing Apparatus. Fort Belvoir, VA: Defense Technical Information Center, dicembre 2002. http://dx.doi.org/10.21236/ada442786.

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Stanek, S. J., e C. S. Hedricks. Evaluation of the KMS 48 Full Face Mask with the Viper Very Shallow Water Underwater Breathing Apparatus. Fort Belvoir, VA: Defense Technical Information Center, aprile 2003. http://dx.doi.org/10.21236/ada442920.

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Long, Edwin T., e M. J. Fennewald. Manned Evaluation of the Carleton 1.3 ATA PO2 Primary Electronics Assembly With the MK 16 Underwater Breathing Apparatus. Fort Belvoir, VA: Defense Technical Information Center, marzo 2000. http://dx.doi.org/10.21236/ada383699.

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Lins, Raymond R., Lee E. Campbell e Aaron M. Hyre. Domestic Preparedness Program: Sarin (GB) and Distilled Sulfur Mustard (HD) Vapor Challenge Testing of Commercial Self-Contained Breathing Apparatus. Fort Belvoir, VA: Defense Technical Information Center, luglio 2003. http://dx.doi.org/10.21236/ada440427.

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