Relevant bibliographies by topics / Propelling power

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Propelling power'

Author: Grafiati
Published: 4 June 2025
Last updated: 23 June 2025

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Journal articles on the topic "Propelling power"

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Toussaint, H. M., A. Beelen, A. Rodenburg, et al. "Propelling efficiency of front-crawl swimming." Journal of Applied Physiology 65, no. 6 (1988): 2506–12. http://dx.doi.org/10.1152/jappl.1988.65.6.2506.

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In this study the propelling efficiency (ep) of front-crawl swimming, by use of the arms only, was calculated in four subjects. This is the ratio of the power used to overcome drag (Pd) to the total mechanical power (Po) produced including power wasted in changing the kinetic energy of masses of water (Pk). By the use of an extended version of the system to measure active drag (MAD system), Pd was measured directly. Simultaneous measurement of O2 uptake (VO2) enabled the establishment of the relationship between the rate of the energy expenditure (PVO2) and Po (since when swimming on the MAD system Po = Pd). These individual relationships describing the mechanical efficiency (8-12%) were then used to estimate Po in free swimming from measurements of VO2. Because Pd was directly measured at each velocity studied by use of the MAD system, ep could be calculated according to the equation ep = Pd/(Pd + Pk) = Pd/Po. For the four top class swimmers studied, ep was found to range from 46 to 77%. Total efficiency, defined as the product of mechanical and propelling efficiency, ranged from 5 to 8%.
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Kagemoto, H., M. J. Wolfgang, D. K. P. Yue, and M. S. Triantafyllou. "Force and Power Estimation in Fish-Like Locomotion Using a Vortex-Lattice Method." Journal of Fluids Engineering 122, no. 2 (1999): 239–53. http://dx.doi.org/10.1115/1.483251.

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The forces and power needed for propelling at constant speed an actively swimming flexible fish-like body are calculated. A vortex-lattice method based on a linearized theory is employed and the results are compared against slender body theory predictions, as well as experimental data from an eight-link robotic instrument, the RoboTuna. Qualitative agreement is found between our method and slender body theory; with quantitative agreement over certain parametric ranges and disagreement for other ranges of practical interest. The present linearized vortex lattice calculations predict the power needed for propelling the RoboTuna with less than 20 percent error in most experiments conducted. [S0098-2202(00)01202-5]
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Wieczorek, Bartosz, Mateusz Kukla, Dominik Rybarczyk, and Łukasz Warguła. "Evaluation of the Biomechanical Parameters of Human-Wheelchair Systems during Ramp Climbing with the Use of a Manual Wheelchair with Anti-Rollback Devices." Applied Sciences 10, no. 23 (2020): 8757. http://dx.doi.org/10.3390/app10238757.

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Purpose: The main purpose of the research conducted was the analysis of kinematic and biomechanical parameters measured during manual wheelchair ramp-climbing with the use of the anti-rollback system and the comparison of the values tested with the manual wheelchair climbing the same ramp but without any modifications. The paper presents a quantitative assessment relating to the qualitative research of the anti-rollback system performed by another research team. Method and materials: The article presents the measurement results of the wheelchair motion kinematics and the activity of four upper limb muscles for eight subjects climbing a 4.58° ramp. Each subject propelled the wheelchair both with and without the anti-rollback system. The kinematic parameters were measured by means of two incremental encoders with the resolution of 500 impulses per single revolution of the measurement wheel. Whereas, the muscle activity was measured by means of surface electromyography with the use of Noraxon Mini DTS apparatus equipped with four measurement channels. Results: The surface electromyography measurement indicated an increase in the muscle activity for all four muscles, during the use of the anti-rollback system. The increase was: 18.56% for deltoid muscle anterior, 12.37% for deltoid muscle posteriori, 13.0% for triceps brachii, and 15.44% for extensor carpi radialis longus. As far as the kinematics analysis is concerned, a decrease in the measured kinematic parameters was observed in most participants. The medium velocity of the propelling cycle decreased by 26%. The ratio of the generated power and the loss power in a single propelling cycle λ had decreased by 18%. The least decrease was recorded for the measurement of mechanical energy E and the propelling cycle duration time. For the total mechanical energy, the decrease level was 3%, and for the propelling cycle duration it was 1%. The research carried out did not demonstrate any impact of the anti-rollback system use on the push phase share in the entire propelling cycle.
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Gatta, Giorgio, Matteo Cortesi, Ian Swaine, and Paola Zamparo. "Mechanical power, thrust power and propelling efficiency: relationships with elite sprint swimming performance." Journal of Sports Sciences 36, no. 5 (2017): 506–12. http://dx.doi.org/10.1080/02640414.2017.1322214.

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Bornstein, Josh. "Employees are losing: Have workplace laws gone too far?" Journal of Industrial Relations 61, no. 3 (2019): 438–56. http://dx.doi.org/10.1177/0022185619834321.

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Concern about the economic, social and political cost of growing income inequality is propelling a debate about the loss of employee bargaining power – both in Australia and other Organisation for Economic Co-operation and Development countries. The evidence of a pronounced decline in the bargaining power of employees in the Australian labour market is overwhelming. The decline is consistent with a collapse in workplace bargaining as a result of a bargaining framework that has not kept up with major structural change in the labour market. In the absence of decisive legislative intervention, the decline of employee bargaining power is likely to continue.
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Kolmogorov, Sergei, Andrei Vorontsov, and João Paulo Vilas-Boas. "Metabolic Power, Active Drag, Mechanical and Propelling Efficiency of Elite Swimmers at 100 Meter Events in Different Competitive Swimming Techniques." Applied Sciences 11, no. 18 (2021): 8511. http://dx.doi.org/10.3390/app11188511.

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Eight elite swimmers—four females and four males—were studied, each of whom specialized in different swimming techniques and ranked among the top 10 in the world in the 100 m event in their swimming specialty. Methods included a complex of physiological, biomechanical and hydrodynamic procedures, as well as mathematical modeling. During the special preparation period for the 2017 Swimming World Championship, all subjects performed an 8 × 100 m swimming step-test using their main swimming technique. The relationships between velocity, mechanical and metabolic power were obtained and analyzed for each swimming technique. It was found that, at the last stage of the test, in all swimming techniques, men demonstrated higher values of metabolic power (Pai = 3346–3560 W) and higher mechanical efficiency (eg = 0.062–0.068) than women (Pai = 2248–2575 W; eg = 0.049–0.052). As for propelling efficiency, women (ep = 0.67–0.71) and men (ep = 0.65–0.71) did not differ from each other. Results showed that the frontal component of active drag force is the main reason for the existing differences in maximal swimming velocity between different techniques, since no relevant differences were observed for mechanical and propelling efficiencies among swimming techniques.
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Астанин, Vladimir Astanin, Поливаев, Oleg Polivaev, Бабанин, and Nikolay Babanin. "Reducing dynamic loading of mobile power equipment from external impacts and increase of their traction and dynamic parameters." Forestry Engineering Journal 3, no. 3 (2013): 150–55. http://dx.doi.org/10.12737/1779.

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Increasing energy saturation of modern mobile power equipment (MPE) is accom-panied by an increase in their dynamic loading of the external influences that have an oscillatory character with variable frequency and amplitude, it causes higher vibration processes in the system soil – propelling device – engine and transmission installation, which leads to lower traction qualities, and hence performance deterioration of techno-logical parameters of tillage and destruction of its structure.
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Seki, Hiroaki, Hodaka Amakata, Yoshitsugu Kamiya, and Masatoshi Hikizu. "Development of Hydraulic Drive Drilling Robot with 4-DOF Tool for In-Pipe Repair – Mechanical Design of New Tool –." International Journal of Automation Technology 6, no. 2 (2012): 221–27. http://dx.doi.org/10.20965/ijat.2012.p0221.

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Lately,many developed countries see their sewer pipes getting increasingly aged. They try to extend the life of aging pipes by using teleoperated sewer robots to repair them as buried in the ground rather than replacing them by largescale digging work. Currently available robots, however, have tools with small DOF (Degrees Of Freedom) to do complex work such as drilling, cutting, and grinding. They also have too heavy oilostatic cables to be self-propelling. To cope with these problems, we intend to develop a new type of sewer robots that can be self-propelling by built-in cylinder-type hydraulic power source and are equipped with multiple-DOF tool driven by hydraulic cylinders in parallel links. In this paper, we propose a 4-DOF parallel link type mechanism for the tool that have wide reachable areas and no singular points. The proposed mechanism is so designed as to be able to retain high stiffness in the predetermined reachable areas as required for work inside pipes.
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Tang, Peng, Chuangxin Zhao, Sen Mao, Jiajie Tian, and Shizhe Liang. "Vector ducted propeller aerodynamic modeling and verification testing." Journal of Physics: Conference Series 2720, no. 1 (2024): 012032. http://dx.doi.org/10.1088/1742-6596/2720/1/012032.

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Abstract The tail-sitter aircraft has the advantages of both high-speed cruise and capability of the take-off and land vertically, high-performance control laws usually rely on the accurate flight mechanics model, while its flight aerodynamic modeling is a complex problem. This paper analytically develops an aerodynamic model of its propelling system based on first principles, including three components of a propeller, a vector duct, and eight slipstream vanes. This model can give the propeller’s induced velocity, power, thrust, and moment, also considers the augmented effect of ducted, and the lift and drag forces of vanes. Moreover, a propelling system test bed is built to measure the forces and moments along the body frame, which is composed of the tail-sitter prototype, power, communication link, upper system, and servo drive device. In addition, experimental results show the effectiveness of the model in estimating the thrust and torque with different angles of control vanes, the measured thrust is consistent with the calculated values, and the steering performance of each vane is further examined. The moments exerted on the two axes are linear with the vanes angles, and the symmetry is also well, which is convenient for flight controller design for this type of tail-sitter aircraft.
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Niyozov, Numon, Salamat Saburov, Shaxruz Ganiyev, and Shirinboy Olimov. "AI-powered learning: revolutionizing technical higher education institutions through advanced power supply fundamentals." E3S Web of Conferences 461 (2023): 01092. http://dx.doi.org/10.1051/e3sconf/202346101092.

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The burgeoning technological education landscape mandates a reevaluation of educational methodologies, especially in pivotal domains such as power supply fundamentals within technical higher education institutions. This scientific article explores the imperative role of integrating Artificial Intelligence (AI) in teaching the fundamentals of power supply to students in technical higher education institutions. Acknowledging power supply’s fundamental significance and the evolving educational challenges, we advocate for the utilization of AI-powered platforms, simulations, and adaptive learning systems. Through a comprehensive analysis, we highlight the potential benefits and contextualize the implementation of AI in Uzbekistan’s technical education scenario. By embracing AI-driven educational approaches, Uzbekistan can cultivate a skilled workforce adept in power supply, fostering innovation and propelling the nation towards a technologically advanced future.
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Dissertations / Theses on the topic "Propelling power"

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Pinard, Gretchen. "The Power of Dignity: Propelling Change in Public Education." Research Showcase @ CMU, 2011. http://repository.cmu.edu/theses/20.

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In an era of struggling public educational systems, the Allegheny County Propel Schools organization has made great strides to improve academic performance while producing students who are also great citizens. From their founding less than a decade ago, a clear vision and approach to education, captured in a handful of Promising Principles, has been an unquestionable part of their success. As the organization grows and new schools are planted, Propel must find effective means of replicating their model to ensure that each Propel school is as successful as the others. With this project, the author aims to prove that design and designers have an important role to play in helping this type of organization reach their goals without approaching the situation from a problem-solving, artifact-based angle. Instead, the author deliberately departs from a discipline-specific design approach to engage strategically with an organization devoted to social impact; through this relationship she uses design methodology in a non-traditional setting to show that the power of fully immersive collaboration is greater than the power of design alone. The result is a set of design recommendations for a systemic model of replication that is both sensitive to the organization’s culture and forward-thinking in its approach. This model, paired with the introduction of a new job position and virtual assistant, is a comprehensive proposal for helping the organization plan for future growth. It is meant to provide a foundation for what is possible, a framework for visualizing the potential, attainable next steps.
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Capatina, Allen A. C. "AXISYMMETRIC BI-PROPELLANT AIR AUGMENTED ROCKET TESTING WITH ANNULAR CAVITY MIXING ENHANCEMENT." DigitalCommons@CalPoly, 2015. https://digitalcommons.calpoly.edu/theses/1493.

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Performance characterization was undertaken for an air augmented rocket mixing duct with annular cavity configurations intended to produce thrust augmentation. Three mixing duct geometries and a fully annular cavity at the exit of the nozzle were tested to enable thrust comparisons. The rocket engine used liquid ethanol and gaseous oxygen, and was instrumented with sensors to output total thrust, mixing duct thrust, combustion chamber pressure, and propellant differential pressures across Venturi flow measurement tubes. The rocket engine was tested to thrust maximum, with three different mixing ducts, three major combustion pressure sets, and a nozzle exit plane annular cavity (a grooved ring). The combustion pressures tested were , , and allowing for a nozzle pressure ratio range of relative to ambient pressure. The mixture ratio was fuel rich throughout all tests. The engine operated very consistently throughout all the tests performed; however, pressure losses in the feed system prevented higher combustion pressures from being tested. Three mixing ducts of the same outer diameter were tested. The short and diverging ducts were the same length and the long duct was long. The short and long ducts created positive mixing duct thrust and the diverging duct created negative mixing duct thrust. The long duct case did show better performance than the no duct case when the total thrust was divided by combustion pressure and nozzle throat area. The long duct always created several times more mixing duct thrust than either the short or diverging ducts, but none of the mixing ducts created positive overall thrust augmentation in the over expanded cases tested. The mixing duct thrusts ranged between and . As the combustion pressures were increased, getting closer the nozzle’s optimal expansion, the mixing duct thrusts started converging indicating a difference between nozzle operation at over expanded and under expanded. The annular cavity had a noticeable effect on the thrust of the engine and the appearance of the plume. The total thrust of the system was decreased by a maximum of and the plume was more sharply defined when the annular cavity was attached. Better mixing between the primary (engine exhaust) flow and the secondary (ambient air) flow was promoted by the annular cavity because it increased the shear layer’s turbulence and the increased turbulence reduced thrust. The greater mixing also allowed for secondary combustion which made the plumes more sharply defined. The annular cavity was also seen to enhance the mixing duct thrusts for all three mixing ducts.
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Selcher, Patricia Willice. "Development of a power-law crack growth model for a rocket motor propellant exhibiting nonlinear viscoelastic behavior." Diss., Georgia Institute of Technology, 2001. http://hdl.handle.net/1853/17829.

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Tsai, Shang-shun, and 蔡尚勳. "Development of propellant inhibitors withhigh char- powder formation." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/77726839254510194213.

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碩士<br>國立中山大學<br>材料科學研究所<br>94<br>Oligomers of soft and hard segments of unsaturated polyesters (UPE) were synthesized in two steps of esterification. For the hard segment, isophthalic acid was first reacted with 1,2-propanediol, then maleic anhydride was added for further esterification. For the soft segment, diethylene glycol was used to replace 1,2-propanediol. Oligomers of soft and hard segments were blended in different ratios, and then cured with various amount of styrene. Dynamic mechanical and the stress-strain properties of these cured UPEs were evaluated. The results indicated that both stress and strain were above the criteria of the inhibitors when the amount of hard segment oligomer was 30, 60 or 70 wt% of UPE, and the added styrene was 35 or 45 phr relative to UPE. The formula of 30 wt% hard segment, 70 wt% soft segment, and 45 phr styrene was selected for the following studies. Tetraethyl orthosilicate (TEOS) and poly(dimethyl siloxane) were incorporated into the uncured UPE resins via sol-gel process. Then fillers and 5, 10, 15, 20 or 30 wt% of magnesium hydroxide were blended with UPE resins and cured. Self-extinguished phenomenon was observed in the erosion tests when the amount of magnesium hydroxide was equal or higher than 15 wt% relative to UPE. After 101 days of nitroglycerin migration experiments, the migration rate and amount were significantly reduced for these filled specimens compared with the current formula of inhibitors. In addition, 2.5 or 5 phr of phenyl triethoxysilane (PhTES) relative to UPE was added together with TEOS to study the physical properties of the organic-inorganic hybrid materials. When the amount of PhTES was 2.5 phr, it was found that the miscibility between inorganic and organic components improved, and their stress- strain properties also satisfied the criteria of the inhibitors.
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Farrow, Derek Damon. "A Theoretical and Experimental Comparison of Aluminum as an Energetic Additive in Solid Rocket Motors with Thrust Stand Design." 2011. http://trace.tennessee.edu/utk_gradthes/969.

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The use of aluminum as an energetic additive in solid rocket propellants has been around since the 1950’s. Since then, much research has been done both on the aluminum material itself and on chemical techniques to properly prepare aluminum particles for injection into a solid propellant. Although initial interests in additives were centered on space limited applications, performance increases opened the door for higher performance systems without the need to remake current systems. This thesis aims to compare the performance for aluminized solid rocket motors and non-aluminized motors, as well as focuses on design considerations for a thrust stand that can be created easily at low cost for initial testing. A theoretical model is created for predicting propellant performance and the results are compared with experimental data taken from the thrust stand as well as existing data. What is seen at the end of testing is the non-aluminized grains follow the same trends as previously conducted tests and firings. The aluminized grains follow their expected trend but at a lower performance level due to grain degradation. However, the aluminized grains still show a specific impulse increase of 6%-23% over the non-aluminized grains.
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Wang, Tzu-Yin, and 王姿尹. "Study on Advanced Performance of Composite Modified Double Base Propellant Containing Aluminum Powder and RDX." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/78283777683631733201.

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碩士<br>國防大學理工學院<br>化學工程碩士班<br>101<br>In this study, the optimum formulations were simulated from NASA Code; andthen the composite modified double base propellants where prepared by solvent method which which have been developed for many years and have matured for production skikks. In order to promote the performance of the double base propellants, the domestic and international studies show that adding metal and solid fuel can enhance the combustion energy and affect the performance of the double base propellants. The purpose of this research is to enhance the performance of the double base propellant by adding micro and nano-sized aluminum and RDX. Firstly, the reaction characteristics of the double base propellants containing the micro and nano-sized aluminum powders and solid fuel (RDX) will be measured using differential scanning calorimetry (DSC) and thermogravimetry (TGA), and the difference between their properties will be analyzed; and then the proper dispersed technique will be evaluated by using scanning electron microscope (SEM) to observe the dispersed effect of micro and nano-sized aluminum, RDX powders in the double base propellants. The above-mentioned research will contribute to the development of advanced double base propellants for military.
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Hou, Hui-Ran, and 侯惠然. "Study on the Dispersion and Combustion Characteristics of Composite Propellant Containing Nano-aluminum Powder with Surface Modification." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/17208923128412821957.

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碩士<br>國防大學中正理工學院<br>應用化學碩士班<br>99<br>Although the composite propellants with nano-aluminum powder have been studied widely, the nano-aluminum powder with small particle size and large surface area has complicated microstructure, rapid oxidization and easy agglomeration leading to loss it’s activity. Therefore, for improving the properties of solid composite propellant, it is urgent to develop the methods of dispersion and protection of nano powders. The purpose of this research is using the surface modification technology of nano-aluminum powder and the dispersion method to the combustion characteristics of composite propellant with surface modification nano-aluminum powder. The composite propellants containing the macro-sized and nano-sized aluminum powders were prepared by different dispersion techniques. The thermal characteristics of propellants as prepared were measured using differential scanning calorimetry (DSC), then the differences among them were analyzed. The scanning electron microscope (SEM) was used to observe the dispersed effect of nano-sized powders in the composite propellants. Finally, the composite propellants were processed to be small cylindrical pellets, and the burning rate meter, window bomb (WB) and quenched particle collection bomb (QPCB) were used to study the burning properties of composite propellants. The burning phenomenon was also analyzed by mean of the combustion observation technique. Furthermore, the pull-testing machine is conducted to evaluate the mechanical properties. The experimental results show that increasing the dispersion of micro / nano-aluminum powder in the propellant, the coefficient of variation of burning rate is smaller, the combustion is more stable, the mechanical properties is significantly improved.
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Ming-TeChen and 陳明德. "A Study of H2O2 Aluminum-Ice Rocket Propellant Performance : The Influence of H2O2/H2O Ratio and Nano/Micro-Aluminum Powder Ratio." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/28gzfg.

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碩士<br>國立成功大學<br>航空太空工程學系<br>103<br>Recently, the energetic reaction of aluminum and water finds renewed special applications in space/rocket propulsion and attracts extensive research interests. In experiments, different sized nano-/micron-aluminum particles tend to be coated with different thickness of oxidation layer due to natural oxidation with ambient air that may retard the reactivity of aluminium burning. However, oxidation layer may serve as a protection layer to prevent unexpected reactions when blending with oxidizers in the propellants. Different sized particles provide different reaction characteristics for combustion for high-efficiency propulsion with energetic oxidizers. Micron-aluminum particles provide high ratio of pure aluminum during continuous combustion with melting dispersion and diffusion mechanisms, while nano-aluminum particles with high reactivity may improve combustion performance due to its lower ignition temperature and lower ignition delay. Energetic oxidizers, such as hydrogen peroxide, are usually employed to enhance reaction and improve propulsion performance. In this research, we focus on the effects of modifying the proportion of micron- and nano-aluminum powders to mix with different concentrations of energetic oxidizer of hydrogen peroxide in order to improve the overall propellant performance. The burning rate of the sample propellants of different micro-nano aluminum ratios with specific O/F is measured in the high pressure strand burner and the measurement data are analyzed by Matlab image processing. By different mixing proportions, the performance of propellant reaction efficiency and regression rate features can be obtained and can be optimized. The effects of nano-/micron-aluminium ratio with high concentration hydrogen peroxide are beneficial to ignition. The regression rates are r_b=0.7624∙P^0.9616 for the case of with nano-aluminum and r_b=0.0078∙P^2.2279 only using micron-aluminum powders respectively. The SEM and EDS scan of the oxidation product show that for the nano/micron case more nano and small particles rupture and burned into splashes of aggregated aluminum oxides and most micron particles are unburned or with minor cracks on the surface showing incomplete combustion of the larger particles, and on the other hand, for the pure micron case obvious holes and significant cracks are found on the surface of the particles signifying the burning of the inside pure aluminum from the large particles.
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Books on the topic "Propelling power"

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Center, NASA Glenn Research, ed. Advanced electric propulsion for space solar power satellites. National Aeronautics and Space Administration, Glenn Research Center, 1999.

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McDonnell Douglas Astronautics Company--Houston Division. and United States. National Aeronautics and Space Administration., eds. Independent Orbiter assessment: Assessment of the electrical power generation/power reactant storage and distribution subsystem FMEA/CIL. McDonnell Douglas Astronautics Company, Houston Division, 1988.

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Rudolf, Meyer. Explosives. 3rd ed. VCH Verlagsgesellschaft, 1987.

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Rudolf, Meyer. Explosives. 5th ed. Wiley-VCH, 2002.

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Propelling India from socialist stagnation to global power. Academic Foundation, 2006.

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Ng, Betty, and Po-Ling Ng. Po-Ling Power: Propelling Yourself and Others to Success. Indie Books International, 2018.

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Ng, Betty, and Po-Ling Ng. Po-Ling Power: Propelling Yourself and Others to Success. Indie Books International, 2018.

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Virmani, Arvind. Propelling India from Socialist Stagnation to Global Power: Growth Process. Academic Foundation, 2006.

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Hemiup, Maria. Our World: The Earth. a Revolving Engine with a Central Propelling Power. Independently Published, 2018.

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Virmani, Arvind. Propelling India from Socialist Stagnation to Global Power: Volume 2: Policy Reforms. Academic Foundation, 2006.

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Book chapters on the topic "Propelling power"

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Huang, Minchao, Jianjun Wu, Jian Li, and Yuqiang Cheng. "Thrust of Solar Thermal Thruster Under Variable Working Conditions." In Solar Thermal Thruster. Springer Nature Singapore, 2024. http://dx.doi.org/10.1007/978-981-97-7490-6_10.

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AbstractExperiments are conducted on the STP system built in Chap. 9 to test the thrust of the solar thermal thruster under different working conditions. In this chapter, the heating power and propellant flow rate are changed to change the thrust.
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Huang, Minchao, Yuqiang Cheng, Jia Dai, and Jian Li. "Introduction." In Performance Analysis of a Liquid/Gel Rocket Engine During Operation. Springer Nature Singapore, 2024. http://dx.doi.org/10.1007/978-981-97-6485-3_1.

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AbstractAccording to the type of propellant, space propulsion systems are divided into monopropellant, bipropellant, cold gas propulsion and electric propulsion systems. The operation of a space propulsion system is closely related to the working status of the structure, control, thermal control, power supply, telemetry, remote control and other subsystems.
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Kim, Sang Wook, Tae Goo Kang, and Young-Ho Cho. "A High-Impulse Low-Power Microthruster Using Liquid Propellant with High-Viscous Fluid-Plug." In Transducers ’01 Eurosensors XV. Springer Berlin Heidelberg, 2001. http://dx.doi.org/10.1007/978-3-642-59497-7_206.

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Hashizume Tsutomu, Kitagawa Hiroshi, Lee Hokyoo, Ueda Hisatoshi, Yoneda Ikuo, and Booka Masayuki. "Biomechanics and Physiology for Propelling Wheelchair Uphill Slope." In Studies in Health Technology and Informatics. IOS Press, 2015. https://doi.org/10.3233/978-1-61499-566-1-447.

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A vertical slope of sidewalks significantly inhibits to the mobility of manual wheelchair users in their daily life. International guidelines of the vertical slope are specified approximately 4% or 5% (1:20) gradient or less as preferred, and allow 8.3% (1:12) as its maximum when it is impossible. Relevant research of the physical strain for wheelchair users with pushing on slopes, and the validity assessment of slope guidelines have been investigated. However, the analysis for the effect of a slope distance and their transient performance are still remained. The purpose of this study is to clarify the physiological and biomechanical characteristics of manual wheelchair users that propelling a wheelchair on an uphill slope. We measured these data by a metabolic analysis system, a heart rate monitor system and an instrumented wheelchair wheel. Sixteen unimpaired subjects (non-wheelchair users) were examined to investigate the effect of a long slope with 120m distance and 8% gradient. And five wheelchair users with cervical cord injury were examined to evaluate the influence of different gradients (5%, 6.7%, 8.3%, 10% and 12.5%) with 3m length in laboratory. Our experimental results of the long slope showed that wheelchair propulsion velocity and power increased considerably at the beginning of the slope where the peak mean value of them were 0.96 m/s and 70.8W and they decreased linearly to 0.55m/s and 33.6W at final interval. A mean oxygen uptake and heart rate were increased as the distance increased and their results indicated the extremely high exercise intensity at a final interval that were 1.2liter /min and 152bpm. While wheelchair pushing cadence reduced after an initial interval, mean of strokes per10m increased to compensate the decrease of upper limb's power. The results of different gradients indicated that the normalized power of subjects with cervical cord injury was significant difference between each subject in the ability to climb a slope. Mean normalized power were 0.23W/kg on a 5% slope, 0.24W/kg on 6.7%, and 0.26W/kg on 8.3% respectively. Based on these findings, we examined the relationship between the theoretical normalized power and the lowest velocity to climb a slope, and we might indicate the ability to push on an uphill slope for the persons with manual wheelchair user.
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Toon, Owen Brian, and Alan Robock. "The Power of Asteroids and Comets." In Earth in Flames. Oxford University PressNew York, NY, 2025. https://doi.org/10.1093/9780197799734.003.0003.

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Abstract The forces propelling asteroids and comets to their high energies originated with the solar system’s formation. This chapter discusses why comets and asteroids have such high velocities and why comets travel faster than asteroids. The probability of asteroid impacts as a function of size and energy is known. One hits Earth with the energy of the Hiroshima atomic bomb nearly every year. Little more than a decade ago, an asteroid disintegrated over Russia with the energy of a large thermonuclear weapon, injuring 1000 people, while little more than a century ago another asteroid blew apart over Russia releasing an energy larger than any weapon in current arsenals, knocking down a forest the size of a small city. NASA now has a program to detect asteroids and comets before they hit Earth, but eventually Earth will be hit by a city killer—and possibly an object with damaging global effects.
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Yarovenko, V. A. "DYNAMICS OF PROPELLING ELECTRIC POWER PLANTS OF ELECTRIC SHIPS’ PROPULSIVE COMPLEXES." In Development of Scientific Schools of Odessa National Maritime University. Izdevnieciba “Baltija Publishing”, 2020. http://dx.doi.org/10.30525/978-9934-588-86-0.08.

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Susmitha, Ms A. Hema. "AI Applications for Sustainability." In Interdisciplinary Research on Sustainability of Business. Iterative International Publishers, Selfypage Developers Pvt Ltd, 2024. https://doi.org/10.58532/nbennurirch2.

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Artificial Intelligence (AI) has emerged as a transformative technology with significant potential to drive sustainability efforts across various sectors. This chapter examines the transformative power of artificial intelligence (AI) in propelling sustainability across diverse industries. It elucidates the types of AI applications, their underlying components, and their multi-dimensional impact on environmental, social, and economic sustainability. This also analyze industry-specific applications to illustrate how AI is being utilized to create more sustainable practices. Through in-depth case studies, the chapter showcases how leading companies are leveraging AI to revolutionize resource optimization, supply chain management, and decision-making processes, paving the way for a more sustainable future
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Green, Jeremy. "Conceptualizing Anglo-American Development." In The Political Economy of the Special Relationship. Princeton University Press, 2020. http://dx.doi.org/10.23943/princeton/9780691197326.003.0002.

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This chapter critiques the tendency of international political economy (IPE) to overlook Anglo-American development. This tendency arises from a fixation with hegemonic cycles of rise and decline that has framed the UK and the US within a declinist narrative that forecloses alternative analytical strategies. The chapter proposes an alternative framework that, by building upon works that have drawn attention to the importance of financial power within the state, conceives of Anglo-American development in terms of the interdependent and coconstitutive relationship between the Federal Reserve–Treasury–Wall Street complex and the City–Bank–Treasury nexus. This developmental perspective provides important correctives to both the hegemony story and the concept of “structural power” prevalent within IPE. Moreover, it reveals the centrality of Anglo-American dynamics to cementing the international dominance of the dollar and propelling financial globalization.
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Mahapatra, Sheila, Saurav Raj, Rohit Babu, and G. Swetha Shekarappa. "Innovation in Smart Grids and E-Mobility Ecosystem." In A Sustainable Future with E-Mobility. IGI Global, 2024. http://dx.doi.org/10.4018/979-8-3693-5247-2.ch001.

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The prevalent grid infrastructure enabled with progressive digital technologies, interfaced with artificial intelligence and smart sensors, paving the way towards bidirectional electricity flow is a smart grid. The existing complexity of power network coupled with the integration of stochastically driven renewables and a drive towards e-mobility eventually makes the evolution towards smart grid extremely pivotal. It is inimitable that advancement in smart grids is essential to operate the power system with enhanced efficiency and cater to system security, reliability, and resiliency. E-mobility is another future-driven technology which is being emphasized across the globe for reducing carbon footprints and propelling towards a sustainable eco-system. The chapter will highlight the coordination between smart grid and e-mobility, overview of integrating renewables and development of energy storage systems, key aspects of e-mobility by applying different solutions.
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Yoshihara, Mari. "The Maestro’s Place in a Changing World." In Dearest Lenny. Oxford University Press, 2019. http://dx.doi.org/10.1093/oso/9780190465780.003.0009.

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When Bernstein arrived in Japan in 1979, the global landscape of classical music was undergoing major transformations. Japan and South Korea were important producers and consumers of classical music, as reflected in the Philharmonic’s itinerary. Japan’s seemingly unrivaled technological and industrial power was symbolized by Sony’s release of the Walkman, which made the company’s name a household word around the globe. CBS/Sony played a central role in Bernstein’s tour, marking a clear contrast with Bernstein’s earlier Japan tours, which were led by government interests. To navigate the changing classical music market, Amberson further corporatized its operations, shaping and guarding the maestro’s image while propelling his reach far beyond the United States.
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Conference papers on the topic "Propelling power"

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Sundaramoorthy, Prabhu, Partha Aswanth Kaperla, Chandravardhan Thummala, Sreekanth Valmiki, Punitha Devireddy, and Arun Vijayakumar. "Indigenous Innovations: Propelling Drones with SYNCREL Motor." In 2024 IEEE Third International Conference on Power Electronics, Intelligent Control and Energy Systems (ICPEICES). IEEE, 2024. http://dx.doi.org/10.1109/icpeices62430.2024.10719180.

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Hansel, Dave. "Abrasive Blast Cleaning - a Vital Foundation for Coating Cost and Success." In CORROSION 1986. NACE International, 1986. https://doi.org/10.5006/c1986-86028.

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Abstract If ever there was a victim of false economy, air abrasive blast cleaning is a prime example. Perhaps it is because abrasive blasting is not a high technology science that it is taken so lightly. When the overall costs of a coating job are analyzed, however, surface preparation may be 40% to as high as 60% of the entire cost. Yet, more times than not, the user will choose to utilize low performance surface preparation equipment with high performance coatings. The results are predictable. The concept of air abrasive blasting is simple. High volume and pressure of compressed air is the power source of propelling abrasive particles at high velocities. Everything in between the air compressor and abrasive is a means to supply, convey and accelerate abrasive particles to their maximum energy level. Each component is precisely designed to play an important part to accomplish its top efficiency. The failure of any one component to function properly will have a dramatic effect on the overall performance.
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Zhang, Xuan, Wenhai Zhang, Jiexin Weng, Gang Bai, Huimin Zhang, and Lei Wang. "Analysis of Current Trends of Comprehensive Support for Missiles' Solid Propellent-Based Power System." In 2023 14th International Conference on Reliability, Maintainability and Safety (ICRMS). IEEE, 2023. http://dx.doi.org/10.1109/icrms59672.2023.00098.

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Suzuki, Tatsuto, Hironobu Uchiyama, Junichi Kurata, and Kenneth T. V. Grattan. "Investigating the Propelling Wheelchair Behavior Against Various Loads." In ASME 2004 International Mechanical Engineering Congress and Exposition. ASMEDC, 2004. http://dx.doi.org/10.1115/imece2004-61439.

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The purpose of this study is to solve an attendant’s daily propelling wheelchair behavior, which is based on propelling force and walking speed against loads, for design of wheelchairs and other carts to handle materials. To obtain the propelling behavior, we proposed the model of the attendant propelling the wheelchair, such as the attendant is a motor, and the wheelchair is a load. Along with the model, we carried out experiments to solve the propelling behavior. The experiments were carried out on the ground and on a new type of a treadmill, which can generate various resistant forces. As the result, the propelling force increased and the walking speed decreased gradually with increasing the resistant force. This change is mostly along on a line. We also define a mechanical power of the propelling behavior and calculated the power. It was about 50W on daily use. The power of the propelling wheelchair is very small, therefore the comfortable design of attendant’s wheelchair must be done with the ability of attendant’s propelling.
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Moriwaki, Katsumi. "Drivability Control to Optimize the Operating Freedom in the Hybrid Vehicle Propelling System." In 2015 IEEE Vehicle Power and Propulsion Conference (VPPC). IEEE, 2015. http://dx.doi.org/10.1109/vppc.2015.7352930.

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von Lavante, Dominik, Dietmar Kuhn, and Ernst von Lavante. "Self-Propelling Cooling Systems: Back-Fitting Passive Cooling Functions to Existing Nuclear Power Plants." In 2012 20th International Conference on Nuclear Engineering and the ASME 2012 Power Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/icone20-power2012-54382.

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The present paper describes a back-fit solution proposed by RWE Technology GmbH for adding passive cooling functions to existing nuclear power plants. The Fukushima accidents have high-lighted the need for managing station black-out events and coping with the complete loss of the ultimate heat sink for long time durations, combined with the unavailability of adequate off-site supplies and adequate emergency personnel for days. In an ideal world, a nuclear power plant should be able to sustain its essential cooling functions, i.e. preventing degradation of core and spent fuel pool inventories, following a reactor trip in complete autarchy for a nearly indefinite amount of time. RWE Technology is currently investigating a back-fit solution involving “self-propelling” cooling systems that deliver exactly this long term autarchy. The cooling system utilizes the temperature difference between the hotter reactor core or spent fuel pond with the surrounding ultimate heat sink (ambient air) to drive its coolant like a classical heat machine. The cooling loop itself is the heat machine, but its sole purpose is to merely achieve sufficient thermal efficiency to drive itself and to establish convective cooling (∼2% thermal efficiency). This is realized by the use of a Joule/Brayton Cycle employing supercritical CO2. The special properties of supercritical CO2 are essential for this system to be practicable. Above a temperature of 30.97°C and a pressure of 73.7bar CO2 becomes a super dense gas with densities similar to that of a typical liquid (∼400kg/m3), viscosities similar tothat of a gas (∼3×105Pas) and gas like compressibility. This allows for an extremely compact cooling system that can drive itself on very small temperature differences. The presented parametric studies show that a back-fitable system for long-term spent fuel pool cooling is viable to deliver excess electrical power for emergency systems of approximately 100kW. In temperate climates with peak air temperatures of up to 35°C, the system can power itself and its air coolers at spent fuel pool temperatures of 85°C, although with little excess electrical power left. Different back-fit strategies for PWR and BWR reactor core decay heat removal are discussed and the size of piping, heat exchangers and turbo-machinery are briefly evaluated. It was found that depending on the strategy, a cooling system capable of removing all decay heat from a reactor core would employ piping diameters between 100–150mm and the investigated compact and sealed turbine-alternator-compressor unit would be sufficiently small to be integrated into the piping.
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Zhao Kuan-Ming, Yang Cheng-Shi, and Qian Zhi-Bo. "Design and Simulation of Stepless-Speed Thermal Power and Propelling System Based on Variable-Fuel-Pump." In 2013 Fifth International Conference on Measuring Technology and Mechatronics Automation (ICMTMA 2013). IEEE, 2013. http://dx.doi.org/10.1109/icmtma.2013.107.

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De Donato, Angelo, Paolo Aliberti, Marco Sorrentino, Fabrizio Cuomo, and Carmine Musto. "Designing and Controlling a Hybrid Fuel Cell System for Propelling a Turboprop Aircraft." In AeroTech Conference & Exhibition. SAE International, 2025. https://doi.org/10.4271/2025-01-0151.

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&lt;div class="section abstract"&gt;&lt;div class="htmlview paragraph"&gt;In the context of aviation sector decarbonization, fuel cell hybrid electric aircrafts are a promising alternative to conventional fuels, presenting opportunities for more sustainable and efficient flight. Hence, the present work is focused on an alternative powertrain architecture, wherein a proton exchange membrane fuel cell system cooperates with a lithium-ion battery to fulfil the electrical power demand of a turboprop-based aircraft. Particularly, a mathematical tool is proposed to evaluate both the components size and performance, while a degradation aware rule-based control strategy guarantees an effective power split between the hybridizing components. Such an energy management approach introduces an idling level and a rate limiter to mitigate degradation associated with start-up/shut-down and transient phases, respectively. Moreover, to have a reliable estimation of the vehicle’s fuel economy, while also guaranteeing the correct components dimensioning, the fuel cell system efficiency model accounts for the recent targets on the achievable power density. The methodology has been applied to a realistic mission profile and the validity of the proposed rule-based strategy, which relies on versatile control maps, has been confirmed via benchmarking against dynamic programming results. The use of such a reference optimal controller for validation purposes represented a novelty in the aviation field. Specifically, when considering an electrical degree of hybridization of 0.79, the dynamic programming outputs a fuel consumption 2% lower than the rule-based strategy, ensuring the effectiveness of the latter.&lt;/div&gt;&lt;/div&gt;
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Moriwaki, Katsumi. "Drivability Control to Optimize the Operating Freedom in the Hybrid Vehicle Propelling System." In ASME/ISCIE 2012 International Symposium on Flexible Automation. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/isfa2012-7230.

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A method of drivability control is newly developed for hybrid vehicles. One of the significant advantages of this mechod is to make the most of operating freedom in a propelling system without disturbing drivability. The purpose of this paper is to discuss the significance of the oprating freedom, and then to deccribe the basic concept of the control method and its applications. The drive control is preformed by tracking to satisfy a drive control criterion, which is given as a function of the accelerator pedal position, the vehicle velocity and its acceleration. The criterion, which does not include any characteristics of a power source, facilitates the effective utilization of the operating freedom.
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Gantt, Lynn R., R. Jesse Alley, and Douglas J. Nelson. "Battery Sizing as a Function of Powertrain Component Efficiencies for Various Drive Cycles." In ASME 2011 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/detc2011-47514.

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The market segment of hybrid-electric and full function electric vehicles is growing within the automotive transportation sector. While many papers exist concerning fuel economy or fuel consumption and the limitations of conventional powertrains, little published work is available for vehicles which use grid electricity as an energy source for propulsion. Generally, the emphasis is put solely on the average drive cycle efficiency for the vehicle with very little thought given to propelling and braking powertrain losses for individual components. The modeling section of this paper will take basic energy loss equations for vehicle speed and acceleration, along with component efficiency information to predict the grid energy consumption in AC Wh/km for a given drive cycle. An electric-only range target is established as part of the vehicle technical specifications. This set range along with component characteristics will impact the sizing of the energy storage subsystem. To demonstrate the usefulness in understanding powertrain losses, the energy use is described in propelling, braking, idle, and charging cases. A simulation focusing on battery sizing to meet power and range requirements shows the impacts of friction brakes, regenerative braking fraction, and average motor efficiency. Vehicle characteristics such as, but not limited to, a range extender application, electric-only vehicle range, and acceleration performance are explained as well. The model is correlated to real world vehicle data for a custom-built plug-in hybrid electric vehicle. By using the Virginia Tech Range Extended Crossover (VTREX) and collecting data from testing, the parameters that the model is based on will be correlated with real world test data. The paper presents a propelling, braking, and net energy weighted drive cycle averaged efficiency that can be used to calculate the losses for a given cycle. In understanding the losses at each component, not just the individual efficiency, areas for future vehicle improvement can be identified to reduce petroleum energy use and greenhouse gases.
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Reports on the topic "Propelling power"

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Bendixen, Shannon, Michael Campbell, Corey Criswell, and Roland Smith. Change-Capable Leadership The Real Power Propelling Successful Change. Center for Creative Leadership, 2017. http://dx.doi.org/10.35613/ccl.2017.2049.

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If you could ask 275 senior executive leaders about how to lead change, what would they have to say? What if they talked about the most important factors for success, what you should do more of, do less of, or avoid all together? What if their experiences could help you lead change in your organization and provide an early warning system to avoid failure? Do we have your attention? If you are a leader facing complex business challenges in your organization that require changes in the way people have always done things, we offer the following insights from the senior executives we asked about their experiences in leading change: 1. Change yourself. Leading change successfully means spending time outside of your comfort zone. As the individual leading an initiative you must change your mindset, actions, and behaviors. 2. Don’t go it alone. Leading change is a team activity. People come together driven by a compelling, and frequently communicated, message about why we are changing. 3. Know the signs . Recognize the early warning signs that indicate an initiative is starting to derail.
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Kraynik, A., A. Geller, and J. Glick. Gelled propellant flow: Boundary layer theory for power-law fluids in a converging planar channel. Office of Scientific and Technical Information (OSTI), 1989. http://dx.doi.org/10.2172/5647885.

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