Academic literature on the topic 'Two-level kinetics'

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Journal articles on the topic "Two-level kinetics"

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Kol'tsov, Nikolay I. "DYNAMICS OF TWO-STAGE CATALYTIC REACTIONS WITH NON-IDEAL KINETICS." ChemChemTech 68, no. 6 (2025): 59–69. https://doi.org/10.6060/ivkkt.20256806.7176.

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The dynamics of two-stage catalytic reactions occurring quasi-steady-state for the main substances (reagents) according to the typical two-stage Temkin and Bonhoeffer-Farkash mechanisms was investigated in an open isothermal gradientless system with the Marcelin-De Donde kinetic law. The Marcelin-De Donde kinetic law takes into account the non-ideality of the reaction medium by expressing the reaction rate through the chemical potentials of intermediate substances, which linearly depend on the concentrations and mutual influence of these substances. The level of mutual influence of intermediat
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Sugandi, Deny, Dewi Susilawati, and Yogi Akin. "Increased Attention Through Kinetic Life Aith A Level Of Concentration On Physical Education Learning: A Study In Elementary School Students." JUARA : Jurnal Olahraga 8, no. 1 (2023): 277–89. http://dx.doi.org/10.33222/juara.v8i1.2710.

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This research examines the effect of the learning model using life kinetics on increasing learning attention as seen from the concentration level of students in one of the elementary schools in Kab. Bandung. The research method used in this research is an experimental method adapted to the research objectives of wanting to know the truth of hypotheses regarding causal relationships with a Quasi-Experimental Design research design. The analysis technique in this study uses multiple classification analyses of variance, using two ways (two-way ANOVA). Two-way analysis of variance to analyze the e
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Longo, Savino. "Stochastic models for the kinetics of ensembles of two-level systems." Physics Letters A 267, no. 2-3 (2000): 117–21. http://dx.doi.org/10.1016/s0375-9601(00)00083-9.

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Caldwell, Graham E., Li Li, Steve D. McCole, and James M. Hagberg. "Pedal and Crank Kinetics in Uphill Cycling." Journal of Applied Biomechanics 14, no. 3 (1998): 245–59. http://dx.doi.org/10.1123/jab.14.3.245.

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Alterations in kinetic patterns of pedal force and crank torque due to changes in surface grade (level vs. 8% uphill) and posture (seated vs. standing) were investigated during cycling on a computerized ergometer. Kinematic data from a planar cine analysis and force data from a pedal instrumented with piezoelectric crystals were recorded from multiple trials of 8 elite cyclists. These measures were used to calculate pedal force, pedal orientation, and crank torque profiles as a function of crank angle in three conditions: seated level, seated uphill, and standing uphill. The change in surface
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Xiao, Yi, Jaeyoung Hong, Xiao Wang, Tao Chen, Taeghwan Hyeon, and Weilin Xu. "Revealing Kinetics of Two-Electron Oxygen Reduction Reaction at Single-Molecule Level." Journal of the American Chemical Society 142, no. 30 (2020): 13201–9. http://dx.doi.org/10.1021/jacs.0c06020.

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Станишевский, И. В., та С. М. Арабей. "Определение констант скоростей и механизма фотопревращений металлопорфиринов методом решения обратной фотокинетической задачи". Оптика и спектроскопия 129, № 2 (2021): 153. http://dx.doi.org/10.21883/os.2021.02.50552.180-20.

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The fluorescence kinetics of some substituted Zn- and Mg-porphyrins in solid polymer films upon excitation by two-step-wise rectangular laser pulses and 293 K were investigated by the inverse kinetic problem methods. The experimental non-monotonic kinetic curves were approximated by the simulated ones within the framework of a six-level energy scheme describing the reversible interconversions between the two complexes. The best fit between the experimental and simulated curves was obtained by iterative optimization using the Nelder-Mead algorithm. Based on the statistically estimated values ​​
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Petrov, E. G., Ye V. Shevchenko, V. O. Leonov, and V. I. Teslenko. "Kinetics in the Two-Level System with Strong Time-De-pendent Coupling of Its States to the Phonon Bath: Spin-Boson Description." Ukrainian Journal of Physics 69, no. 8 (2024): 552. http://dx.doi.org/10.15407/ujpe69.8.552.

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Using the methods of nonequilibrium statistical mechanics, the master equation for the density matrix of an open dissipative quantum system is obtained under conditions, when the coupling between the electronic states of the system and the nuclear displacements in it is controlled by the alternating field. A time-dependent polaron transformation is proposed, which made it possible to solve kinetic equations using an expansion in a parameter characterizing transitions between “phonon-dressed” electronic states of the system. As an example, a mechanism is shown that can control the kinetics in a
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Burgin, M. S. "Equivalent two-level atom method for calculating the kinetics of cosmological hydrogen recombination." Bulletin of the Lebedev Physics Institute 36, no. 4 (2009): 110–13. http://dx.doi.org/10.3103/s1068335609040034.

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Ota, Susumu, Ai Nakanishi, Hirotaka Sato, Seiji Akita, Kazunori Hase, and Yasuo Suzuki. "DIFFERENCES IN KNEE JOINT KINEMATICS AND KINETICS DURING LEVEL WALKING AND WALKING WITH TWO TYPES OF POLES — FOCUS ON KNEE VARUS MOMENT." Journal of Musculoskeletal Research 16, no. 04 (2013): 1350018. http://dx.doi.org/10.1142/s0218957713500188.

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Walking with poles is one of the gait modification strategies for reducing external knee varus moments in people with medial knee osteoarthritis (OA). However, there are two types of pole techniques, Nordic walking (NW: pole back condition) and pole walking (PW: pole front condition). The purpose of this study was to investigate the differences in knee joint kinematics, and kinetics during level walking, and two types of walking with poles. A total of 22 subjects with a mean age of 21.2 years (SD: 1.3 years) participated. Three-dimensional gait analysis was conducted on level walking (LW), NW
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Jing, Wenwen, Ashley Hunt, Nongjian Tao, Fenni Zhang, and Shaopeng Wang. "Simultaneous Quantification of Protein Binding Kinetics in Whole Cells with Surface Plasmon Resonance Imaging and Edge Deformation Tracking." Membranes 10, no. 9 (2020): 247. http://dx.doi.org/10.3390/membranes10090247.

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Most drugs work by binding to receptors on the cell surface. Quantification of binding kinetics between drug and membrane protein is an essential step in drug discovery. Current methods for measuring binding kinetics involve extracting the membrane protein and labeling, and both have issues. Surface plasmon resonance (SPR) imaging has been demonstrated for quantification of protein binding to cells with single-cell resolution, but it only senses the bottom of the cell and the signal diminishes with the molecule size. We have discovered that ligand binding to the cell surface is accompanied by
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Dissertations / Theses on the topic "Two-level kinetics"

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Хоменко, Олексій Віталійович, Алексей Витальевич Хоменко, Oleksii Vitaliiovych Khomenko та ін. "Двухуровневая и двухмодовая кинетика фрагментации металлов при интенсивной пластической деформации". Thesis, Сумский государственный университет, 2017. http://essuir.sumdu.edu.ua/handle/123456789/65669.

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Обработка металлов методами интенсивной пластической деформации (ИПД) позволяет получить объемные образцы с практически беспористой субмикрокристаллической (СМК) или нанокристаллической (НК) структурой, обладающей высокими физико-механическими свойствами.
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Smith, Austin. "Agreement Level of Running Temporal Measurements, Kinetics, and Force-Time Curves Calculated from Inertial Measurement Units." Digital Commons @ East Tennessee State University, 2021. https://dc.etsu.edu/etd/3861.

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Inertial measurement units (IMUs) and wearable sensors have enabled athlete monitoring and research to become more ecologically valid due to their small size and low cost. IMUs and accelerometers that are placed on the body close to the point of impact and that record at sufficiently high frequencies have demonstrated the highest validity when measuring temporal gait event moments such as ground contact time (GCT) and flight time (FT) as well as peak forces (PF) during upright running. While the use of IMUs has increased in the sport performance and athlete monitoring realm, the potential of t
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Books on the topic "Two-level kinetics"

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Bokstein, Boris S., Mikhail I. Mendelev, and David J. Srolovitz. Thermodynamics and Kinetics in Materials Science. Oxford University Press, 2005. http://dx.doi.org/10.1093/oso/9780198528036.001.0001.

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This text presents a concise and thorough introduction to the main concepts and practical applications of thermodynamics and kinetics in materials science. It is designed with two types of uses in mind: firstly for one or two semester university course for mid- to - upper level undergraduate or first year graduate students in a materials-science-oriented discipline and secondly for individuals who want to study the materials on their own. The following major topics are discussed: basic laws of classical and irreversible thermodynamics, phase equilibria, theory of solutions, chemical reaction t
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Book chapters on the topic "Two-level kinetics"

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Durrant, James R., George Porter, James Barber, and David R. Klug. "The Influence of Energy Level Disorder on the Charge Separation / Trapping Kinetics in Photosystem Two." In Photosynthesis: from Light to Biosphere. Springer Netherlands, 1995. http://dx.doi.org/10.1007/978-94-009-0173-5_143.

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McCauley, Micah J., Joha Joshi, Nicole Becker, et al. "Quantifying ATP-Independent Nucleosome Chaperone Activity with Single-Molecule Methods." In Single Molecule Analysis. Springer US, 2023. http://dx.doi.org/10.1007/978-1-0716-3377-9_2.

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AbstractThe dynamics of histone-DNA interactions govern chromosome organization and regulates the processes of transcription, replication, and repair. Accurate measurements of the energies and the kinetics of DNA binding to component histones of the nucleosome under a variety of conditions are essential to understand these processes at the molecular level. To accomplish this, we employ three specific single-molecule techniques: force disruption (FD) with optical tweezers, confocal imaging (CI) in a combined fluorescence plus optical trap, and survival probability (SP) measurements of disrupted
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Rawat, Shweta, and Sanjay Kumar. "The Feasibility Study of Green Microalgae Assisted Coal Mine Effluent Desalination." In Proceedings of the Conference BioSangam 2022: Emerging Trends in Biotechnology (BIOSANGAM 2022). Atlantis Press International BV, 2022. http://dx.doi.org/10.2991/978-94-6463-020-6_25.

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AbstractCarbon-neutral sustainable approaches are highly demanding in the coal energy sector. Coal mine effluent disposal is a severe challenge with crucial concern issues of salinity hazard and heavy metal contamination due to long-duration water and coal interaction. The medium to the high salinity of coal mine effluent leads towards irrigation unsuitability due to the negative impact upon infiltration and permeability of nutrients from the soil to plant. Focusing on the international irrigation water quality standards given by the Food and Agriculture Organization (FAO) of the United Nation
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Wilde, Nicole, and Roger Gläser. "Thermodynamics and Kinetics." In Contemporary Catalysis: Science, Technology, and Applications. The Royal Society of Chemistry, 2017. http://dx.doi.org/10.1039/9781849739900-00156.

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Thermodynamics and kinetics build the physico-chemical fundamentals for the quantitative description of chemical reactions. Hence, they are at the heart of chemical and engineering science and applications as a whole and, of course, include and govern catalytic reactions as well. In the present chapter, the most important basic principles of chemical thermodynamics are briefly presented and the relevance to catalysis is emphasized. Besides treatment of the chemical equilibrium, examples for applications in reaction engineering, mostly with respect to optimizing the maximum achievable conversio
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Pope, Martin, and Charlese E. Swenberg. "Photoemission from organic molecular crystals." In Electronic Processes in Organic Crystals and Polymers. Oxford University PressNew York, NY, 1999. http://dx.doi.org/10.1093/oso/9780195129632.003.0004.

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Abstract The electrons that are ejected from a solid subsequent to the absorption of highenergy light contain considerable information about the static energy level structure of the solid and the density of states at these energies. In addition, photoemission that is produced as a result of bimolecular reactions between two excited states (of which at least one is mobile) inside the solid constitutes a new and powerful method not only for elucidating static energy levels but also for studying the dynamic properties of excitons, free and trapped carriers, and other transient species. Kineticall
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Desroches G., Louis N., Dumas R., Vaslin P., Gorce P., and Chèze L. "Shoulder joint moment contribution to movement during manual wheelchair propulsion." In Assistive Technology Research Series. IOS Press, 2010. https://doi.org/10.3233/978-1-60750-080-3-73.

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The purpose of this study was to establish the contribution (e.g. driving or stabilizing) of net shoulder joint moment to shoulder movement during manual wheelchair (MW) propulsion. Two male able-bodied propelled in a wireless wheelchair ergometer. Kinetics and kinematics of propulsion were recorded simultaneously bilaterally. An inverse dynamic method was used to compute net joint moment and angular velocity at shoulder level. The 3D angle between net shoulder joint moment and angular velocity was computed over the propulsive cycle to determine if net moment mainly drove (angle close to 0 or
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Koch, Christof. "Diffusion, Buffering, and Binding." In Biophysics of Computation. Oxford University Press, 1998. http://dx.doi.org/10.1093/oso/9780195104912.003.0017.

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In Chap. 9 we introduced calcium ions and alluded to their crucial role in regulating the day-to-day life of neurons. The dynamics of the free intracellular calcium is controlled by a number of physical and chemical processes, foremost among them diffusion and binding to a host of different proteins, which serve as calcium buffers and as calcium sensors or triggers. Whereas buffers simply bind Ca2+ above some critical concentration, releasing it back into the cytoplasm when [Ca2+]i has been reduced below this level, certain proteins— such as calmodulin—change their conformation when they bind
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Fushman, D. A. "Kinetic Properties of the Two-Level Systems in Glasses with Account of Tunneling." In February 1. De Gruyter, 1985. http://dx.doi.org/10.1515/9783112495247-031.

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Balucani, Umberto, and Marco Zoppi. "Generalized kinetic theory." In Dynamics of the Liquid State. Oxford University PressOxford, 1995. http://dx.doi.org/10.1093/oso/9780198517399.003.0004.

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Abstract Up to the early 1970s, a ‘kinetic approach’ to the time-dependent properties of fluids was synonymous with a framework based on statistical mechanics in which a central role is played by those dynamical events referred to as uncorrelated binary collisions. Although the details of these collisional events depend on the specific form of the interatomic potential, in most cases the relevant effects are due to the harsh repulsion prevailing at small separations, often modelled as a ‘hard sphere’ interaction. As a consequence, a collision may usually be considered as an event strongly loca
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Winterton, R. H. S. "Conduction." In Heat Transfer. Oxford University Press, 1997. http://dx.doi.org/10.1093/hesc/9780198562979.003.0002.

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This chapter delves into the process of conduction during heat transfer. It explains that conduction heat transfer is the flow of kinetic energy from one molecule to the next by direct contact between the two. At the molecular level the internal energy of a material can be regarded as that same kinetic energy, as found in atoms and molecules. The chapter then turns to steady state conduction, providing straightforward cases in simple one-dimensional geometries. The chapter imagines a scenario where these assumptions are not justified, and it provides a more basic approach in the form of a gene
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Conference papers on the topic "Two-level kinetics"

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Ma, Zheng, Yang Yang, Bruce Brown, Srdjan Nesic, and Marc Singer. "Investigation of FeCO3 and FeS Precipitation Kinetics by EQCM." In CORROSION 2018. NACE International, 2018. https://doi.org/10.5006/c2018-11192.

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Abstract Corrosion product layers play a key role in the corrosion processes by precipitating on the steel surface and can lead either to enhanced corrosion protection or, in some cases, to severe pitting, depending on the conditions. The kinetics of precipitation of corrosion product layers has a direct impact on the layers properties and their level of protectiveness. In the present study, the precipitation kinetics of iron carbonate (FeCO3) and iron sulfide (FeS) were studied over a range of temperatures to gain a better understanding of their effect on corrosion resistance. An Electrochemi
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Ma, Zheng, Bruce Brown, Srdjan Nesic, and Marc Singer. "Investigation of FeS Precipitation Kinetics by EQCM." In CORROSION 2019. NACE International, 2019. https://doi.org/10.5006/c2019-13425.

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Abstract The precipitation kinetics of FeS were studied at varied system temperatures using an Electrochemical Quartz Crystal Microbalance (EQCM). Two different substrates were used for FeS precipitation studies: a cathodically polarized iron-coated quartz crystal, and a freely corroding iron-coated quartz crystal. Precipitation rates were repeatable and consistent when compared at the same temperature. Overall observations show that the precipitation rates of FeS were not very sensitive to the change of temperature. Analysis of the experimental data has also shown that the FeS saturation leve
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Hornus, Edgar C., Martín A. Rodríguez, Ricardo M. Carranza, and Raul B. Rebak. "Effect of Temperature on the Repassivation Kinetics of Crevice-Corroded Nickel Base Alloys." In CORROSION 2015. NACE International, 2015. https://doi.org/10.5006/c2015-05739.

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Abstract Nickel alloys containing chromium and molybdenum are candidate materials for the construction of high-level nuclear waste containers. The temperature at the waste containers surface will rise after the repository closure due to the heat released from radioactive decay. After reaching a peak, temperature will slowly decrease. In the present work, we have studied the crevice corrosion repassivation kinetics on cooling, for alloys N06022, N07022 and N10362 in chloride solutions. A two-stage electrochemical test was used. Crevice corrosion initiation and propagation occurred after an incu
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Macdonald, Digby D., Tsung-Kuang Yeh, and Arthur T. Motta. "Simultaneous Radiolysis, ECP, and Crack Growth Modeling of Components in BWR Coolant Systems." In CORROSION 1995. NACE International, 1995. https://doi.org/10.5006/c1995-95403.

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Abstract An algorithm for assessing, theoretically, the effectiveness of hydrogen water chemistry (HWC) in Boiling Water Reactors (BWRs) is described. The algorithm, DAMAGE-PREDICTOR, contains facilities for estimating the concentrations of radiolysis products (in particular O2, H2, and H2O2), the electrochemical corrosion potential (ECP), and the kinetics of growth of a reference crack in sensitized Type 304SS, around the primary heat transport circuit (HTC) as a function of power level and the concentration of hydrogen added to the feedwater. The power level, in turn, determines various ther
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Crolet, Jean-Louis, and G. Maisonneuve. "Construction of a Universal Scale of Severity for Hydrogen Cracking." In CORROSION 2000. NACE International, 2000. https://doi.org/10.5006/c2000-00127.

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Abstract In both its upstream and downstream sectors, the oil & gas industry has to cope with hydrogen cracking in various hydrogenating media, including sour service, cathodic protection (CP), anhydrous HF, or cold hydrogen gas. In order to allow the general transposition of the detailed materials specifications recently established for wet H2S, it has been attempted to directly compare the severity of these different media. The principle of the method employed is to measure the back pressure PH2 developed in a hollow sensor which can be immersed in any corrosive medium. In the steady sta
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Colonna, Gianpiero, Lucia Daniela Pietanza, and Mario Capitelli. "Reduced Two-Level Approach for Air Kinetics in Recombination Regime." In 27TH INTERNATIONAL SYMPOSIUM ON RAREFIED GAS DYNAMICS. AIP, 2011. http://dx.doi.org/10.1063/1.3562833.

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Moiseev, S. A. "Kinetics of spatial frequency grating decay in the two-level medium." In PECS '97: Photon Echo and Coherent Spectroscopy, edited by Vitaly V. Samartsev. SPIE, 1997. http://dx.doi.org/10.1117/12.287710.

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McGilvray, Kirk C., Amy S. Lyons, A. Simon Turner, Vikas V. Patel, and Christian M. Puttlitz. "Kinetic and Biomechanical Testing of Two-Level Cervical Disc Replacement." In ASME 2007 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2007. http://dx.doi.org/10.1115/sbc2007-175338.

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Cervical disc replacement has become an increasingly common practice in Europe and several disc designs are currently being evaluated via clinical trial for regulatory approval in the United States. The majority of these procedures have been performed at one level in the absence of adjacent level fusion. However, recent conference proceedings have reported on multi-level implantations of these devices. Numerous literature accounts have reported on the in vitro kinetics and kinematics of these devices that have generally shown motion equivalence to the intact spine when implanted at one level.
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Wang, Sihong, Kenneth R. Diller, and Shanti J. Aggarwal. "Heat Shock Protein 70 Expression Kinetics." In ASME 2002 International Mechanical Engineering Congress and Exposition. ASMEDC, 2002. http://dx.doi.org/10.1115/imece2002-33678.

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HSP70 is well known for its major role in cardiac ischemia protection. The purpose of this study was to determine the HSP70 expression kinetics for new protocol design in cardiac surgery, based on HSP70 protection function in clinical applications. Bovine aortic endothelial cells (BAEC) were used in experiments. Cells were heated at 42°C at different time intervals up to 5 hours and subsequently incubated at 37°C for up to 48 hours. Western blot and quantitative protein analysis were performed to measure HSP70 expression. The expression kinetics is a function of thermal stress time as well as
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Elsner, Ann E., and Stephen A. Burns. "Models of photopigment kinetics: changes with age." In OSA Annual Meeting. Optica Publishing Group, 1989. http://dx.doi.org/10.1364/oam.1989.fa4.

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Two methods have been used to describe the changes with light level and age of photopigment kinetics: color matching (which is little influenced by increased scattered light with aging) and retinal densitometry (which is influenced by both pigment optical density and photoreceptor coverage). Using a color matching technique, we have reported that for the foveal cones, the amount of light required to bleach half of the photopigment (halfbleach illuminance) decreases with age after 30 yr, while the optical density of the functioning cones does not.1 We now report that there is also a significant
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