Thematische Bibliographien / Heart rate calculation

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Auswahl der wissenschaftlichen Literatur zum Thema „Heart rate calculation“

Autor: Grafiati

Veröffentlicht am 23. Juni 2021

Zuletzt aktualisiert am 2. Februar 2022

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Zeitschriftenartikel zum Thema "Heart rate calculation"

Connolly, Declan A. J. „How Accurate Is Your Training Heart Rate Calculation?“ Strength and Conditioning Journal 24, Nr. 5 (Oktober 2002): 15–16. http://dx.doi.org/10.1519/00126548-200210000-00004.

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Sedliar, I. „Calculation the intensity of aerobic exercise in fitness“. Scientific Journal of National Pedagogical Dragomanov University. Series 15. Scientific and pedagogical problems of physical culture (physical culture and sports), Nr. 12(120) (25.12.2019): 105–9. http://dx.doi.org/10.31392/npu-nc.series15.2019.12(120)19.21.

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According to the vast majority of experts, aerobic exercises are basic in fitness. Their effectiveness in the practice involves the rational regulation of load parameters, one of which is the intensity of exercises. However as practice shows the proposed methods for determining the necessary intensity of aerobic exercises do not quite adequately take into account the individual characteristics - age and fitness level. The purpose of the research is to evaluate methods for calculating intensity of aerobic exercise in fitness. In our studies we proceeded from the fact that calculation methods should consider two main trends. At the aging heart rate at rest slightly rises, and the upper pulse during exercises decreases. A higher fitness connected with significant decrease in heart rate at rest and an increase in its upper rate at critical intensity (expanding the range of heart rate during exercise). According to the vast majority of specialists, aerobic exercise is basic in wellness physical culture. Their effective application in the practice of wellness work implies rational regulation of the load parameters, one of which is the intensity of work. As a result the analysis of real situations it was demonstrated that the calculation intensity of aerobic activity according to heart rate indicators using formulas that take into account only the age of the practitioners is applicable in a certain age range (up to about 50-55 years). As age increases the correctness of such calculations decreases and loses its meaning in certain point due to the fact that calculated indicators of heart rate during exercises may be less than those at rest. Karvonen formula which takes into account the individual level of physical fitness for heart rate at rest is more accurate for determining heart rate in aerobic exercise. Its using allows us more correctly determine the lower pulse during exercises declining it because decrease in resting heart rate. However this formula also declining the upper pulse during exercises, although it should increase as the cardiovascular system improves.

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Kołodziej, Marcin, Andrzej Majkowski, Remigiusz J. Rak, Bartosz Świderski und Andrzej Rysz. „System for automatic heart rate calculation in epileptic seizures“. Australasian Physical & Engineering Sciences in Medicine 40, Nr. 3 (18.05.2017): 555–64. http://dx.doi.org/10.1007/s13246-017-0557-z.

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Ahmad, Imteyaz. „A Time Domain Method for Calculation of Heart Rate Variability“. International Journal of Computer Applications 176, Nr. 40 (15.07.2020): 14–17. http://dx.doi.org/10.5120/ijca2020920482.

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Chabot, Denis, Max Bayer und André de Roos. „Instantaneous heart rates and other techniques introducing errors in the calculation of heart rate“. Canadian Journal of Zoology 69, Nr. 4 (01.04.1991): 1117–20. http://dx.doi.org/10.1139/z91-156.

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Data on heart rate can be analyzed in terms of beats per unit of time (heart rate) or its reciprocal, time per beat (interbeat interval). We show that counting beats (including fractions), averaging interbeat intervals, and measuring the time for a fixed number of beats are correct techniques to measure heart activity within observation periods. QRS counts are less precise, but not systematically biased. Conversely, averaging instantaneous heart rates always overestimates true heart rate. Arithmetic means across trials of equal duration are correct only when heart activity for each trial is expressed as mean heart rate. For observation periods with equal numbers of beats, heart activity for each trial must be expressed as mean interbeat interval. A literature survey showed that biased techniques were frequently used to calculate heart rate, and that about half of the studies did not provide sufficient information on the methods used.

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Sedliar, Iurii. „Calculation of the intensity of health improving aerobic loads“. Scientific Journal of National Pedagogical Dragomanov University. Series 15. Scientific and pedagogical problems of physical culture (physical culture and sports), Nr. 5(125) (27.09.2020): 135–39. http://dx.doi.org/10.31392/npu-nc.series15.2020.5(125).27.

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The article analyzes the methods of calculating the intensity of aerobic health-improving loads and presents own solution the problem. The effective use of aerobic exercises is based on the formula calculation of the parameters of physical activity corresponding to the individual characteristics of the practitioners, among which one of the most important is intensity. However, the practical application of the proposed formulas indicates that they do not always adequately take into account the most important, in this case, age characteristics and the functional state of the cardiovascular system. The purpose of the research is to develop a method for determining the intensity of aerobic health-improving loads which makes it possible to calculate the target heart rate more adequately than the currently existing options. Among the existing formulas the most adequate for calculating heart rate in the process of health-improving aerobic exercise is Karvonen's formula which takes into account not only age but also heart rate at rest which reflect the functional state of the cardiovascular system. Its advantage lies in the more correct determination of the lower target pulse. The disadvantage of this formula is that it reduces, rather than increases, the upper target pulse due to the increased efficiency of the cardiovascular system. During the theoretical research it was established that it was impossible to develop a single formula that would allow to correctly determine the upper and lower target pulse. In this regard we came to the conclusion that to calculate the lower heart rate it is necessary to use the Karvonen formula and the upper tagert puls should be determined by the formula developed by us. It is based on the Haskell & Fox formula (HRmax = 220 - age). The proposed additions determine the upper heart rate as the result of subtracting the individual heart rate from the average age heart rate. A procedure for calculating specific puls based on knowledge of the upper and lower heart rate is proposed.

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Sharpley, Christopher F. „Differences in pulse rate and heart rate and effects on the calculation of heart rate reactivity during periods of mental stress“. Journal of Behavioral Medicine 17, Nr. 1 (Februar 1994): 99–109. http://dx.doi.org/10.1007/bf01856885.

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Rajib, R. U. D., Moon Ho Lee, Shadiul Hoque, Rayhan Sharif und Syeedur Rahman. „Heart Rate Calculation by Using Filtering Module Analysis from Electrocardiogram Data“. Advanced Science, Engineering and Medicine 6, Nr. 1 (01.01.2014): 108–10. http://dx.doi.org/10.1166/asem.2014.1463.

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Lu, Yujia, Ping Du, Xiaotian Xiong, Lang Qian, Jianrong Ou und Jinqu Zhang. „A Heart Rate Calculation Method Based on Dynamic Rectangular Window Interception“. Journal of Physics: Conference Series 1168 (Februar 2019): 022038. http://dx.doi.org/10.1088/1742-6596/1168/2/022038.

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ChuDuc, Hoang, Phyllis K. Stein und Hung PhamManh. „Effect of Calculation Algorithm on Heart Rate Variability by Chaos Theory“. International Journal of Electronics and Electrical Engineering 1, Nr. 3 (2013): 145–48. http://dx.doi.org/10.12720/ijeee.1.3.145-148.

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Dissertationen zum Thema "Heart rate calculation"

Håkansson, Dennis, und Johan Lövberg. „Development of algorithm for a mobile-based estimation of heart rate“. Thesis, Malmö universitet, Fakulteten för teknik och samhälle (TS), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-43561.

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To perform a physical performance test is a good way to keep track of one’s health and can be beneficial to find evidence of deviations in the body. This thesis focuses on the development of a mobile-based heart rate algorithm that can be used with the Queens College Step Test, on the behalf of Mobistudy. Mobistudy wants to include such a test in their mobile application which aims to become a tool for researchers to use to gather data. The algorithm uses the mobile device’s camera to collect data from the user’s finger and uses that data to calculate the heart rate. The algorithm was first tested with data collected during the development and the results has an average error of less than 5% and a standard deviation of less than 3%. Two participants between the age of 20-25 performed three sets each of the Queens College Step Test and the results showed that the algorithm was accurate in its estimation of the heart rate after the test.
Genom att utföra ett test av ens fysiska prestanda kan man utvärdera ens hälsostatus och upptäcka indikationer på avvikelser i kroppen. Syftet med detta arbete är att utveckla en mobilbaserad algoritm som kan beräkna och uppskatta ens puls när man utför the Queens College Step Test på begäran av Mobistudy. Mobistudy vill inkludera detta test i deras mobilapplikation som fokuserar på att kunna användas som ett verktyg inom forskning för att samla in data. Algoritmen använder sig av mobilens kamera för att samla in data från användarens finger och använder den insamlade data för att beräkna pulsen. Algoritmen testades först gentemot data som samlades in vid utvecklingsstadiet och resultatet visade på att genomsnittliga felet var under 5% samt att standardavvikelsen var under 3%. Två deltagare mellan åldern 20 och 25 utförde tre tester var utav the Queens College Step Test och resultatet visade att algoritmen var tillräckligt noggrann i sin uppskattning av pulsen efter ett utfört test.

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Harris, J. B. „Calculation of convective heat transfer rates in geometries relating to nuclear reactor safety research“. Thesis, University of Exeter, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.377312.

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Andrews, Nathan Christopher Ivanov Kostadin N. „Primary calculation of the linear heat rate generation of a BWR pin in the ATR B-11 position“. [University Park, Pa.] : Pennsylvania State University, 2010. http://honors.libraries.psu.edu/theses/approved/WorldWideIndex/EHT-238/index.html.

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Tsai, Kun-Hsi, und 蔡昆熹. „TSA Algorithm for Precise Pulse Rate Calculation From Heart Sound“. Thesis, 2015. http://ndltd.ncl.edu.tw/handle/h89bwk.

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博士
國立交通大學
生物科技學系
103
Pulse rate measurement is important for clinicians to access patient treatment as well as evaluate patient status. However, in many emergency situations, oxygen concentration was obtained by pulse oximeters and transformed into pulse rate, which is very unstable and can be influenced by the injured limb or nails decoration (nail polish, painting). When patients are experiencing critical situations such as pulseless electronic activity (PEA), it can lead to misjudgment and administered inappropriate first aid measures or lengthen the judgment time. In this study, we develop an algorithm, which can relate to the heart sound to calculate heart rates. The DS301 is equipped with this algorithm to measure the exact heart rate by the heart sound. This timing precision algorithm collected the 48KHz heart sound signal through reduce sampling, a band-pass filter, TT filtering function, TTMA moving average method, the peak position, and standard deviation calculations to simplify and catch the frequency strong band. With repeated cycles, characteristic standard deviation calculation and threshold conditions to filter out clean first, second heart sound (S1, S2) to the corresponding pulse signal. In this way, we greatly reduce the environmental noise, which diminishes the probability of inaccuracy in the heart rate measurement. To test this algorism, the prototype DS301 was used on 18 different subjects to measure heart rate included pulmonary valve, aortic pulse signal, tricuspid, and mitral valves at five diferent points. The MP70 physiological monitors (Philips intellivue mp70) was used as a reference to measure the heart rate. The TSA detection rate was 91.33% and an average detection rate of 7.025 seconds, which indicate that DS301 is with considerable potential.

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Bücher zum Thema "Heart rate calculation"

Kamenskaya, Valentina, und Leonid Tomanov. The fractal-chaotic properties of cognitive processes: age. ru: INFRA-M Academic Publishing LLC., 2020. http://dx.doi.org/10.12737/1053569.

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In the monograph the literature information about the nature of stochastic processes and their participation in the work of the brain and human behavior. Established that the real cognitive processes and mental functions associated with the procedural side of external events and the stochastic properties of the internal dynamics of brain systems in the form of fluctuations of their parameters, including cardiac rhythm generation and sensorimotor reactions. Experimentally proved that the dynamics of the measured physiological processes is in the range from chaotic regime to a weakly deterministic — fractal mode. Fractal mode determines the maximum order and organization homeostasis of cognitive processes and States, as well as high adaptive ability of the body systems with fractal properties. The fractal-chaotic dynamics is a useful quality to examine the actual physiological and psychological systems - a unique numerical identification of the order and randomness of the processes through calculation of fractal indices. The monograph represents the results of many years of experimental studies of the reflection properties of stochastic sensorimotor reactions, as well as stochastic properties of heart rate in children, Teens and adults in the age aspect in the speech activity and the perception of different kinds of music with its own frequency-spectral structure. Designed for undergraduates, graduate students and researchers that perform research and development on cognitive psychology and neuroscience.

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M, Yos Jerrold, Thompson Richard A und Langley Research Center, Hrsg. A Review of reaction rates and thermodynamic and transport properties for the 11-species air model for chemical and thermal nonequilibrium calculations to 30000K. Hampton, Va: National Aeronautics and Space Administration, Langley Research Center, 1989.

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Plebani, Mario, Monica Maria Mion und Martina Zaninotto. Biomarkers of renal and hepatic failure. Oxford University Press, 2015. http://dx.doi.org/10.1093/med/9780199687039.003.0039.

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In the last few years, major advances have been achieved in the understanding of the molecular and pathophysiological mechanisms which underlie the complex interactions between the heart and the kidney, as well as between the heart and the liver. According to these new insights, new biomarkers have been proposed for better evaluating and monitoring patients affected by cardiovascular diseases. In addition, some biomarkers should be used as risk factors and for an early identification and treatment of these severe diseases. This chapter reviews the most important biomarkers for evaluating the ‘cardiorenal syndrome’, in particular, the measurement of serum creatinine and its use for calculating the glomerular filtration rate which, with the new and more efficient equation, namely Chronic Kidney Disease Epidemiology Collaboration, still remains the most widely used biomarker. The role of newer biomarkers will be explored. The measurement of cystatin C, representing additional information, particularly in paediatric age groups and in the early phase of kidney disease, plays an increasing role. Neutrophil gelatinase-associated lipocalin is a recently developed and very promising new biomarker for the diagnosis of acute kidney injury, while the well-known albumin/creatinine ratio has been re-evaluated as a simple and useful tool for an early identification of kidney disease. Regarding liver diseases, a growing body of evidence demonstrates the usefulness of non-invasive makers of hepatic fibrosis that may avoid the need for a liver biopsy in most patients. A promising field of research is represented by the role of non-alcoholic fatty liver disease in the pathogenesis of cardiovascular disease.

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Karatasakis, G., und G. D. Athanassopoulos. Cardiomyopathies. Oxford University Press, 2011. http://dx.doi.org/10.1093/med/9780199599639.003.0019.

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Echocardiography is a key diagnostic method in the management of patients with cardiomyopathies.The main echocardiographic findings of hypertrophic cardiomyopathy are asymmetric hypertrophy of the septum, increased echogenicity of the myocardium, systolic anterior motion, turbulent left ventricular (LV) outflow tract blood flow, intracavitary gradient of dynamic nature, mid-systolic closure of the aortic valve and mitral regurgitation. The degree of hypertrophy and the magnitude of the obstruction have prognostic meaning. Echocardiography plays a fundamental role not only in diagnostic process, but also in management of patients, prognostic stratification, and evaluation of therapeutic intervention effects.In idiopathic dilated cardiomyopathy, echocardiography reveals dilation and impaired contraction of the LV or both ventricles. The biplane Simpson’s method incorporates much of the shape of the LV in calculation of volume; currently, three-dimensional echocardiography accurately evaluates LV volumes. Deformation parameters might be used for detection of early ventricular involvement. Stress echocardiography using dobutamine or dipyridamole may contribute to risk stratification, evaluating contractile reserve and left anterior descending flow reserve. LV dyssynchrony assessment is challenging and in patients with biventricular pacing already applied, optimization of atrio-interventricular delays should be done. Specific characteristics of right ventricular dysplasia and isolated LV non-compaction can be recognized, resulting in an increasing frequency of their prevalence. Rare forms of cardiomyopathy related with neuromuscular disorders can be studied at an earlier stage of ventricular involvement.Restrictive and infiltrative cardiomyopathies are characterized by an increase in ventricular stiffness with ensuing diastolic dysfunction and heart failure. A variety of entities may produce this pathological disturbance with amyloidosis being the most prevalent. Storage diseases (Fabry, Gaucher, Hurler) are currently treatable and early detection of ventricular involvement is of paramount importance for successful treatment. Traditional differentiation between constrictive pericarditis (surgically manageable) and the rare cases of restrictive cardiomyopathy should be properly performed.

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Buchteile zum Thema "Heart rate calculation"

Nagy, P., und Á. Jobbágy. „Heart Rate Variability Calculation Using Heart Periods Measured Between Consecutive Ponset Points“. In 8th European Medical and Biological Engineering Conference, 613–21. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-64610-3_69.

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Yang, Dong, Yingli Liu und Tao Du. „Network Flow Modelling for Optimizing Fire Smoke Control in Complex Urban Traffic Link Tunnels: Incorporating Heat Loss and Gas Species Generation Rate Calculation into Models“. In The Proceedings of 11th Asia-Oceania Symposium on Fire Science and Technology, 993–1007. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-32-9139-3_72.

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Grandi, Fabio, Margherita Peruzzini, Roberto Raffaeli und Marcello Pellicciari. „Transdisciplinary Assessment Matrix to Design Human-Machine Interaction“. In Advances in Transdisciplinary Engineering. IOS Press, 2020. http://dx.doi.org/10.3233/atde200076.

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Successful interaction with complex systems is based on the system ability to satisfy the user needs during interaction tasks, mainly related to performances, physical comfort, usability, accessibility, visibility, and mental workload. However, the “real” user experience (UX) is hidden and usually difficult to detect. The paper proposes a Transdisciplinary Assessment Matrix (TAS) based on collection of physiological, postural and visibility data during interaction analysis, and calculation of a consolidated User eXperience Index (UXI). Physiological data are based on heart rate parameters and eye pupil dilation parameters; postural data consists of analysis of main anthropometrical parameters; and interaction data from the system CAN-bus. Such a method can be adopted to assess interaction on field, during real task execution, or within simulated environments. It has been applied to a simulated case study focusing on agricultural machinery control systems, involving users with a different level of expertise. Results showed that TAS is able to validly objectify UX and can be used for industrial cases.

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Petryshyn, Igor, und Olexandr Bas. „NATURAL GAS HEAT COMBUSTION DETERMINATION ON MEASURING SYSTEMS WITH DUPLICATE GAS UNITS“. In Integration of traditional and innovative scientific researches: global trends and regional aspect. Publishing House “Baltija Publishing”, 2020. http://dx.doi.org/10.30525/978-9934-26-001-8-2-8.

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The paper focuses on the need to determine the natural gas heat combustion in order to transition to gas metering in units of energy. The technical organization of gas transportation in the main and distribution pipelines on the territory of Ukraine is shown. A detailed analysis of regulatory and legal support, which regulates the definition and accounting of quantitative and qualitative characteristics of natural gas at gas metering units. The draft Rules for determining the natural gas volume are considered in detail. Specified variants of determining the weighted average value of combustion heat in the case of complex gas supply systems with the use of flow measuring means of gas combustion heat. The necessity and urgency of determining the natural gas heat combustion on measuring systems, which are equipped with duplicate metering units without the installation flow means measuring the heat combustion. Emphasis is placed on the fact that a large number of measuring systems are built on the method of variable pressure drop with the use of standard orifice devices. It is pointed out that this method, according to its physical principle, measures the mass gas flow rate. It is also stipulated that ultrasonic gas meters are often used to complete duplicate metering units. The advantages of ultrasonic meters are given. Attention is drawn to the availability of technical metrological support in Ukraine on the basis calibration prover, which includes two secondary standards gas volume and volume flow rate units. Methods and technical means for determining the natural gas heat combustion are analyzed. The calculation of the gas heat combustion and the Wobbe number based on the density values is shown. It is noted that the value of the gas mass flow rate is related to the value of the gas volume flow rate precisely the value of density. The nonlinear dependence of the gas mass heat combustion for the density, which is associated with a disproportionate change in the percentage of carbon atoms to hydrogen atoms, is shown. The structural scheme of the measuring system with the duplicating metering unit for gas density definition and gas heat combustion calculation is developed. The density calculation and natural gas heat combustion depending on the molar fraction of nitrogen and carbon dioxide in the gas from the minimum to the maximum value is carried out. The linear dependence of the change in the gas heat combustion for the molar fraction of nitrogen is established, on the basis of which the method of controlling the gas heat combustion for measuring systems with a duplicate metering unit is proposed. It is shown that the developed procedure for determining the natural gas heat combustion based on the value of density, which is obtained from the calculation of gas mass flow rate and gas volume flow rate consumption on measuring systems with duplicate metering units exactly satisfies class B and C according to DSTU OIML R 140.

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Shen, Wei, und Benjamin Rouben. „CANDU Reactor.Physics Analysis Methods and Computer Codes“. In Fundamentals of CANDU Reactor Physics, 113–31. ASME, 2021. http://dx.doi.org/10.1115/1.884836_ch11.

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Reactor physics aims to understand accurately the reactivity and the distribution of all the reaction rates (most importantly of the power), and their rate of change in time, for any reactor configuration. To do this, the multiplication factor (or, equivalently, reactivity) and the neutron-flux distribution under various operating conditions and at different times need to be calculated repeatedly. Most of the other parameters of interest (such as neutron reaction rates, power, heat deposition, etc.) are derived from them. They are governed by the geometry, the material composition and the nuclear data (i.e., the neutron cross sections, their energy dependence, the energy spectra and the angular distributions of secondary particles, etc.). For radiation-shielding calculations, additional photon interactions and coupled neutron-photon interaction data are required.

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Lighton, John R. B. „Direct Calorimetry“. In Measuring Metabolic Rates, 49–62. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198830399.003.0006.

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This chapter describes calorimetry or the direct measurement of heat production, a technique first used by Lavoisier and Paulze for measuring metabolic rates. Bomb calorimetry—a technique for measuring the energy content of foods and other materials—is also described. The three most common applications of direct calorimetry—gradient, differential, and fluid transfer calorimetry—are described. Methods for combining direct calorimetry with indirect calorimetry (or respirometry) and the compensating calculations that are required are presented, together with a brief description of a basic direct calorimeter for small mammals that can be made from inexpensive and commonly available materials.

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Kobayashi, Shiro, Soo-Ik Oh und Taylan Altan. „Thermo-Viscoplastic Analysis“. In Metal Forming and the Finite-Element Method. Oxford University Press, 1989. http://dx.doi.org/10.1093/oso/9780195044027.003.0015.

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The main concern here is the analysis of plastic deformation processes in the warm and hot forming regimes. When deformation takes place at high temperatures, material properties can vary considerably with temperature. Heat is generated during a metal-forming process, and if dies are at a considerably lower temperature than the workpiece, the heat loss by conduction to the dies and by radiation and convection to the environment can result in severe temperature gradients within the workpiece. Thus, the consideration of temperature effects in the analysis of metal-forming problems is very important. Furthermore, at elevated temperatures, plastic deformation can induce phase transformations and alterations in grain structures that, in turn, can modify the flow stress of the workpiece material as well as other mechanical properties. Since materials at elevated temperatures are usually rate-sensitive, a complete analysis of hot forming requires two considerations—the effect of the rate-sensitivity of materials and the coupling of the metal flow and heat transfer analyses. A material behavior that exhibits rate sensitivity is called viscoplastic. A theory that deals with viscoplasticity was described in Chap. 4. It was shown that the governing equations for deformation of viscoplastic materials are formally identical to those of plastic materials, except that the effective stress is a function of strain, strain-rate, and temperature. The application of the finite-element method to the analysis of metal-forming processes using rigid-plastic materials leads to a simple extension of the method to rigid-viscoplastic materials. The importance of temperature calculations during a metal-forming process has been recognized for a long time. Until recently, the majority of the work had been based on procedures that uncouple the problem of heat transfer from the metal deformation problem. Several researchers have used the following approach. They determined the flow velocity fields in the problem either experimentally or by calculations, and they then used these fields to calculate heat generation. Examples of this approach are the works of Johnson and Kudo on extrusion, and of Tay et al. on machining. Another approach uses Bishop’s numerical method in which heat generation and transportation are considered to occur instantaneously for each time-step with conduction taking place during the time-step.

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Taler, Dawid, Jan Taler und Marcin Trojan. „The CFD Based Method for Determining Heat Transfer Correlations on Individual Rows of Plate-Fin and Tube Heat Exchangers“. In Heat Transfer - Design, Experimentation and Applications [Working Title]. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.97402.

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The chapter provides an analytical mathematical model of a car radiator, which includes different heat transfer coefficients (HTCs) on the first and second row of pipes. The air-side HTCs in the first and second row of pipes in the first and second pass were calculated using the correlations for the Nusselt number, which were determined by CFD simulation using the ANSYS software. Mathematical models of two radiators were built, one of which was manufactured of round tubes and the other of oval tubes. The model permits the determination of thermal output of the first and second row of tubes in the first and second pass. The small relative differences between the thermal capacities of the heat exchanger occur for different and uniform HTCs. However, the heat flow rate in the first row is much greater than the heat flow in the second row if the air-side HTCs are different on the first and second tube row compared to a case where the HTC is uniform in the whole heat exchanger. The heat transfer rates in both radiators calculated using the developed mathematical model were compared with those determined experimentally. The method for modeling of plate-fin and tube heat exchanger (PFTHE) proposed in the paper does not require empirical correlations to calculate HTCs both on the air side and on the inner surfaces of pipes. The presented method of calculating PFTHEs, considering different air-side HTCs evaluated using CFD modeling, may considerably reduce the cost of experimental research concerning new design heat exchangers implemented in manufacturing.

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Syaiful und M. Kurnia Lutfi. „Numerical Investigation of Heat Transfer and Fluid Flow Characteristics in a Rectangular Channel with Presence of Perforated Concave Rectangular Winglet Vortex Generators“. In Heat Transfer - Design, Experimentation and Applications [Working Title]. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.96117.

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The high thermal resistance of the airside of the compact heat exchanger results in a low heat transfer rate. Vortex generator (VG) is one of the effective passive methods to increase convection heat transfer by generating longitudinal vortex (LV), which results in an increase in fluid mixing. Therefore, this study aims to analyze the convection heat transfer characteristics and the pressure drop of airflow in a rectangular channel in the presence of a concave rectangular winglet VG on a heated plate. Numerical calculations were performed on rectangular winglet pairs vortex generators (RWP VGs) and concave rectangular winglet pairs vortex generators (CRWP VGs) with a 45° angle of attack and one, two, and three pairs of VGs with and without holes. The simulation results show that the decrease in the value of convection heat transfer coefficient and pressure drop on CRWP with three perforated VG configuration is 4.63% and 3.28%, respectively, of the three pairs of CRWP VG without holes at an airflow velocity of 2 m/s.

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Fealey, Robert D. „Thermoregulatory Sweat Test“. In Clinical Neurophysiology, 643–57. Oxford University Press, 2016. http://dx.doi.org/10.1093/med/9780190259631.003.0038.

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The thermoregulatory sweat test (TST) consists of giving a controlled heat and humidity stimulus to produce a generalized sweat response. The TST assesses the integrity of efferent sympathetic sudomotor pathways. The entire anterior body surface is tested for both pre- and post-ganglionic lesions. The TST can evaluate patients with symptoms of small-fiber neuropathy and demonstrate autonomic involvement in disorders such as multiple system atrophy, hyperhidrosis, and some skin disorders. An indicator powder placed on the body surface before heating provides visualization of sweating and non-sweating skin. The patient’s weight (before and after heating) and height allows calculation of total body sweat rate, and the slope of the core temperature rise with time provides an estimate of heat tolerance. Normal and abnormal TST patterns, report generation, and difficulties and pitfalls in test interpretation are described.

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Konferenzberichte zum Thema "Heart rate calculation"

Kalinkov, Kalin, Valentina Markova und Todor Ganchev. „Heart Rate Variability calculation methods“. In 2020 International Conference on Biomedical Innovations and Applications (BIA). IEEE, 2020. http://dx.doi.org/10.1109/bia50171.2020.9244285.

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Paliwal, Sukriti, C. Vasantha Lakshmi und C. Patvardhan. „Real time heart rate detection and heart rate variability calculation“. In 2016 IEEE Region 10 Humanitarian Technology Conference (R10-HTC). IEEE, 2016. http://dx.doi.org/10.1109/r10-htc.2016.7906818.

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Risk, M. R., D. F. Slezak, P. Turjanski, A. Panelli, R. A. M. Taborda und G. Marshall. „Time series calculation of heart rate using multi rate FIR filters“. In 2007 34th Annual Computers in Cardiology Conference. IEEE, 2007. http://dx.doi.org/10.1109/cic.2007.4745542.

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Imtiaz, Mohammad Shamim, Rajeena Shrestha, Talwinder Dhillon, Kazi Ata Yousuf, Bilal Saeed, Anh Dinh und Khan Wahid. „Cardiac cycle and heart rate calculation based on seismocardiogram“. In 2013 26th IEEE Canadian Conference on Electrical and Computer Engineering (CCECE). IEEE, 2013. http://dx.doi.org/10.1109/ccece.2013.6567772.

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Liu, Lei, Qun-Chao Chen und Liang-Hung Wang. „Fast algorithm for heart rate calculation based on an Android application“. In 2017 IEEE International Conference on Consumer Electronics - Taiwan (ICCE-TW). IEEE, 2017. http://dx.doi.org/10.1109/icce-china.2017.7991041.

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Meddah, Karim, Malika Kedir-Talha und Hadjer Zairi. „FPGA-based system for heart rate calculation based on PPG signal“. In 2017 5th International Conference on Electrical Engineering - Boumerdes (ICEE-B). IEEE, 2017. http://dx.doi.org/10.1109/icee-b.2017.8192157.

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Berset, T., I. Romero, A. Young und J. Penders. „Robust heart rhythm calculation and respiration rate estimation in ambulatory ECG monitoring“. In 2012 IEEE-EMBS International Conference on Biomedical and Health Informatics (BHI). IEEE, 2012. http://dx.doi.org/10.1109/bhi.2012.6211599.

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Parsinejad, Payam, Yolanda Rodriguez-Vaqueiro, Jose Angel Martinez-Lorenzo und Rifat Sipahi. „Combined Time-Frequency Calculation of pNN50 Metric From Noisy Heart Rate Measurements“. In ASME 2014 Dynamic Systems and Control Conference. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/dscc2014-6297.

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pNN50 is a metric derived from heart rate (HR) measurements, and it is known to correlate with mental-workload changes in human subjects. Conventionally, this metric is calculated based on the variability of successive time periods in peak-to-peak occurrences in HR data. In the case of noisy measurements of HR, however, peak-to-peak detection may not be reliable. Here, we present a combined time-frequency domain analysis, benefiting from Short Time Fourier Transform, by which we can more accurately extract pNN50 metric from noisy HR data. An experimental measurement with added noise is used as a benchmark problem to demonstrate the effectiveness of the approach with noticeable improvement over the conventional time domain peak-to-peak detection algorithm.

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Ayub, Shahanaz, Gaurav Gupta und Yogender Kumar. „Heart Rate Calculation and Detection of T-Wave Alternans by Correlation Method“. In 2016 8th International Conference on Computational Intelligence and Communication Networks (CICN). IEEE, 2016. http://dx.doi.org/10.1109/cicn.2016.45.

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Santos, Andres, Maria J. Ledesma-Carbayo, Norberto Malpica, Manuel Desco, Jose C. Antoranz, Pedro Marcos-Alberca und Miguel A. Garcia-Fernandez. „Accuracy of heart strain rate calculation derived from Doppler tissue velocity data“. In Medical Imaging 2001, herausgegeben von Michael F. Insana und K. Kirk Shung. SPIE, 2001. http://dx.doi.org/10.1117/12.428235.

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Berichte der Organisationen zum Thema "Heart rate calculation"

Plodinec, M. J. Method of calculation of heat generation rates for DWPF glass. Office of Scientific and Technical Information (OSTI), März 1992. http://dx.doi.org/10.2172/7025424.

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Plodinec, M. J. Method of calculation of heat generation rates for DWPF glass. Office of Scientific and Technical Information (OSTI), Februar 1993. http://dx.doi.org/10.2172/6593562.

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Richard G. Ambrosek, Gray S. Chang und Debbie J. Utterbeck. Advanced Fuel Cycle Initiative - Projected Linear Heat Generation Rate and Burnup Calculations. Office of Scientific and Technical Information (OSTI), Februar 2005. http://dx.doi.org/10.2172/911238.

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Plodinec, M. J. Method of calculation of heat generation rates for DWPF glass. Revision 2. Office of Scientific and Technical Information (OSTI), Februar 1993. http://dx.doi.org/10.2172/10151234.

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Plodinec, M. J. Method of calculation of heat generation rates for DWPF glass. Revision 1. Office of Scientific and Technical Information (OSTI), März 1992. http://dx.doi.org/10.2172/10190215.

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