Relevant bibliographies by topics / Voigt reaction

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Academic literature on the topic 'Voigt reaction'

Author: Grafiati
Published: 4 June 2021
Last updated: 8 February 2022

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Journal articles on the topic "Voigt reaction"

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de Andrade, Mônica C., Geysa N. Carneiro, Elizabeth L. Moreira, Jorge C. Araújo, and Valéria C. A. Moraes. "Synthesis and Characterization of Barium Titanate by Solid-State Reaction." Materials Science Forum 802 (December 2014): 285–90. http://dx.doi.org/10.4028/www.scientific.net/msf.802.285.

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Solid-state reactions were used to synthesize pure and doped barium titanate powder. Barium titanate formation with tetragonal perovskite structure was detected by X-ray diffraction and occurred at a temperature above 700°C for pure powder and 500°C for doped powder. However, quite crystalline samples were observed only at 800oC and 600°C for pure and doped barium titanate, respectively, what made the refinement of the synthesized powders possible. They were characterized by X-ray diffraction and Fourier transform infrared spectroscopy and scanning electron microscopy. X-ray diffraction data was analyzed by using the Fullprof Rietveld refinement approach, Thompson-Cox-Hastings pseudo-Voigt with function. The refinement method was effective in the study of the temperature influence on the microstructure of the analysis of pure and doped barium titanate.
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Selvalakshmi, T., and Arumugam Chandra Bose. "Optical Study on Gadolinium Oxide Nanoparticles Synthesized by Hydrothermal Method." Advanced Materials Research 585 (November 2012): 105–9. http://dx.doi.org/10.4028/www.scientific.net/amr.585.105.

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Cubic phase gadolinium oxide nanoparticles were prepared by hydrothermal method at various reaction temperatures like 60 °C, 120 °C, 180 °C and 240 °C. X-ray Diffraction (XRD) studies confirmed the formation of cubic phase Gd2O3. The broadening of XRD peak, due to crystallite size was investigated with the aid of gaussian and voigt peak fitting function and its comparisons were also performed. Crystallite size calculated from Scherrer formula for Gd2O3 nanoparticles for various reactions temperatures varies between 21 nm and 39 nm. Thermal analysis of as-prepared sample was done and the decomposition temperature was found to be 433 °C for the formation of Gd2O3. The metal-oxygen band in Fourier Transform Infrared Spectroscopy (FTIR) spectra confirmed the presence of Gd2O3. Band gap studies from Diffuse Reflectance Spectroscopy (DRS) revealed the decrease in band gap with respect to the increase in crystallite size. In Photoluminescence (PL) spectra, a broad ultra violet emission is observed between 320 nm and 400 nm. Irrespective of reaction temperature, Scanning Electron Microscopy (SEM) images reported the formation of nanorods.
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Pang, S. T., T. C. Tsao, and L. A. Bergman. "Active and passive Damping of Euler-Bernoulli Beams and Their Interactions." Journal of Dynamic Systems, Measurement, and Control 115, no. 3 (September 1, 1993): 379–84. http://dx.doi.org/10.1115/1.2899113.

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Active and Passive damping of Euler-Bernoulli beams and their interactions have been studied using the beam’s exact transfer function model without mode truncation or finite element or finite difference approximation. The combination of viscous and Voigt damping is shown to map the open-loop poles and zeros from the imaginary axis in the undamped case into a circle in the left half plane and into the negative real axis. While active PD collocated control using sky-hooked actuators is known to stabilize the beam, it is shown that the derivative action using proof-mass (reaction-mass) actuators can destabilize the beam.
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Yang, Shao-Chong, and Qing-Sheng Yang. "Geometrically Nonlinear Transient Response of Laminated Plates with Flexible Supports." International Journal of Structural Stability and Dynamics 18, no. 02 (February 2018): 1871002. http://dx.doi.org/10.1142/s0219455418710025.

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Laminated plates are loading-bearing components that are generally connected to flexible pads and exhibit complicated mechanical responses. To investigate the geometrically nonlinear transient responses of a laminated plate with flexible pad supports, a varied constraint reaction model and a systematic numerical procedure are presented in this paper. The flexible pad supports of the plate were treated as viscoelastic boundary conditions, wherein the strip-type pad per unit length was modeled as a cantilever beam. The nonlinear Kelvin–Voigt model was developed to simulate the nonlinear viscoelastic behaviors of the flexible pads. The dynamically varied constraint reactions generated by the viscoelastic supports, which depend upon the displacement and velocity of the nodes along the plate edge, were determined by the deflection and slope equations of the beam theory used, and they were applied on the plate edges by using the nonlinear load functions. Thus, the dynamical responses of the laminated plate with viscoelastic supports were obtained. Numerical results show that the present method can effectively treat the geometrically nonlinear transient response of the laminated plate with viscoelastic supports, and it is essential to consider the effects of non-ideal boundary conditions in the nonlinear transient analysis.
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Sasaki, Tohru, Yudai Fujiwara, Kaoru Tachikawa, Kenji Terabayashi, and Kuniaki Dohda. "Hydraulic Micro Device with Force Sensing for Measurement of Mechanical Characteristics." International Journal of Automation Technology 14, no. 4 (July 5, 2020): 625–32. http://dx.doi.org/10.20965/ijat.2020.p0625.

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The medical and bio-engineering fields have been increasingly using information and communication technology. To introduce robots into surgical procedures, data on surgical operations are required. Several studies have tried the creation of data on living tissues for mechanical actions, which makes determining the mechanical characteristics of living tissues vital, but few have been commonly used. Therefore, we previously developed a sensing system that uses a hydraulic-driven micro mechanism to measure the force applied to an object when it is touched. Micro force sensors are necessary for various manipulations requiring careful operation. Unfortunately, the measurement accuracy of sensors tends to reduce with the reduction in sensor size. The proportional output in conventional force sensors, such as piezoelectric sensors, also decreases when the size of the sensor is reduced. However, a micro force sensor using a hydraulic-driven micro mechanism can obtain a large output even when it is small. Our system uses Pascal’s principle to measure small forces acting on the end effector. We propose methods for identifying the mechanical characteristics of certain viscoelastic materials similar to those used in a living organ. A hydraulic-driven micro device pushes an object and measures the reaction force and its displacement. We have used two types of micro devices, micro cylinder and micro bellows. Its stiffness and viscosity coefficient are obtained through calculations using Kelvin-Voigt and Zenner models. Discrete displacement and load data are applied to the estimated model, and the mechanical characteristics of the materials are identified as a minimized value between the estimated value and experimental one. We conducted experiments using the proposed identification methods on viscoelastic materials, and the results indicate that the value provided from the Kelvin-Voigt model was near the truth value.
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Lisowski, Bartłomiej, Clement Retiere, José Pablo Garcia Moreno, and Paweł Olejnik. "Semiempirical identification of nonlinear dynamics of a two-degree-of-freedom real torsion pendulum with a nonuniform planar stick–slip friction and elastic barriers." Nonlinear Dynamics 100, no. 4 (May 15, 2020): 3215–34. http://dx.doi.org/10.1007/s11071-020-05684-6.

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Abstract The purpose of this study is to identify the nonlinear dynamics of the double torsion pendulum with planar friction and elastic barriers. The original experimental stand consists of a disk-shaped body that rotates freely on top of a forced column with a system of barriers limiting the torsional vibrations of the pendulum bodies that create an nonuniform planar rotational friction contact. Two beam springs form soft barriers modeled by Voigt elements that limit the angular displacement of one of the pendulum bodies—the disk, while the second limiting system, made of a much more rigid barrier, limits the movement of the pendulum’s second body. The dynamic behavior of the asymmetrical system of two degrees of freedom with discontinuities is identified with the use of the described strategy, numerical solutions of the derived mathematical model and the Nelder–Mead simplex algorithm. The actual measurement series and numerical solutions show a good similarity of the dynamical reaction of the mechanical system and its virtual analog.
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Singh, B. P., R. A. Singh, M. K. Sinha, and B. N. Singh. "Evaluation of technique for screening Fe-efficient genotypes of rice in calcareous soil." Journal of Agricultural Science 105, no. 1 (August 1985): 193–97. http://dx.doi.org/10.1017/s0021859600055878.

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Lime-induced Fe chlorosis is often a severe problem on calcareous and saline alkali soils. Symptoms of apparent Fe deficiency and responses to its application on several field crops have been observed under such soil conditions (Indian Council of Agricultural Research, 1980–81; Sakal, Singh & Singh, 1982, 1983). Rice varieties exhibit variable reaction to Fe stress when cultivated as an upland crop especially at seedling stage in the nursery (Patel, Ramakrishanyya & Patel, 1977; Singh et al. 1984). Plant analysis is one of the accepted tools for diagnosing nutritional disorders. Chlorotic plants often contain more total Fe than the green plants (Katyal & Sharma, 1.980; Voigt et al. 1982). In order to overcome this elusive behaviour of Fe it has been suggested that in place of total Fe the plants should be analysed for active Fe or dilute HCl-extractable Fe (Machold & Stephen, 1969). Iron is important for chlorophyll biosynthesis and is linked with a number of enzyme systems. The change in the activities of the enzymes has beenused as a yardstick to distinguish Fe deficiency in plants (Del Rio et al. 1978). Wallace (cf. Katyal & Sharma, 1980) and Patel et al. (1977) suggested analysing the plants for that fraction of Fe which correlates well with occurrence of chlorosis.
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Tregubov, Vladimir P., and Nadezhda K. Egorova. "Investigation of the frequency properties of a standard linear body." Vestnik of Saint Petersburg University. Applied Mathematics. Computer Science. Control Processes 17, no. 2 (2021): 166–73. http://dx.doi.org/10.21638/11701/spbu10.2021.206.

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It is known that the Кelvin-Voigt model does not describe stress relaxation, which is observed along with elastic properties in many polymers and biomaterials. In this regard, the standard linear body model is used to describe the properties of these materials. Studies of its properties were mainly limited to the study of its reaction to an instantaneously applied load, as well as to the determination of the time and nature of stress relaxation. Аt the same time, the frequency properties of the standard linear body remained unexplored. In this regard, an analysis of its frequency properties was carried out, which made it possible to study its behavior under vibration exposure. Оn the basis of the equation of motion, the amplitude-frequency response (АFC) was constructed, and its peculiarity was revealed, which consists in the fact that an increase in the damping coefficient leads to a decrease in the maximum value of the АFC only to a certain value greater than one. А further increase in the damping coefficient leads to an increase in the maximum frequency response up to infinity at a frequency that should also be considered resonant. Thus, the frequency response of a standard linear body always has a maximum. The subsequent increase in the damping coefficient leads to the tendency of the maximum frequency response to zero at infinity.
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Rickford, John R. "Crafting a more integrated, specific, and community-sensitive approach to applied sociolinguistics." Language in Society 47, no. 3 (June 2018): 364–68. http://dx.doi.org/10.1017/s0047404518000301.

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A sociolinguist's first reaction to Lewis’ critique of Labov's thirty-five-year-old principle of error correction (PEC) would likely be defensive or dismissive. While never formulated as the full-fledged ‘theory of social change’ Lewis portrays it to be, the PEC has indeed offered a valuable ‘theoretical starting place for diverse social-change efforts’ (Lewis, this issue, p. 326) by (socio)linguists over the years, repeatedly allowing us to use our technical training to provide more accurate diagnoses of language-related social issues than nonlinguists could, and thereby paving the way for their successful (re)solution. An early example is the 1985 trial of Paul Prinzivalli (see Labov 1988), who was rightfully found not guilty of making telephone bomb threats against Pan Am Airlines on the basis of Labov's careful phonetic evidence that his speech did not match the caller's recorded Boston accent. A more recent example is that of Voigt et al. (2017), whose computational analysis of police body-camera footage from 981 stops of Black and White drivers in Oakland, CA revealed that officers showed significantly more verbal respect to White than to Black drivers. This research is now being used to improve police training and police-community interactions in Oakland. In both cases, we could argue that, as in medicine, without an accurate diagnosis, a successful solution would elude us. And we might add that community beneficiaries of the (socio)linguist's on-the-ground ‘error correction and knowledge dissemination’ (Lewis, this issue, p. 339) might value this more than the critical race theorist's lofty theorizing.
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Gupta, K. C., S. P. Goyal, and Rohit Mukherjee. "Some results on generalised voigt functions." ANZIAM Journal 44, no. 2 (October 2002): 299–303. http://dx.doi.org/10.1017/s144618110001395x.

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Recently, Srivastava, Pathan and Kamarujjama established several results for generalised Voigt functions which play an important role in several diverse fields of physics—such as astrophysical spectroscopy and the theory of neutron reactions. In the present paper we aim to generalise some partly bilateral and partly unilateral representations and generating functions of Srivastava et al. by considering a specialised version of the Srivastava-Chen definition of the unified Voigt functions. Several special cases of our main results are mentioned briefly.
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Dissertations / Theses on the topic "Voigt reaction"

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Liu, Xiaoling [Verfasser], Brigitte [Akademischer Betreuer] [Gutachter] Voit, and Xinliang [Gutachter] Feng. "Polymeric Multicompartmentalized Systems Mimicking Artificial Cells for Controllable Multiple Enzymatic Cascade Reactions / Xiaoling Liu ; Gutachter: Brigitte Voit, Xinliang Feng ; Betreuer: Brigitte Voit." Dresden : Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2017. http://d-nb.info/1147287376/34.

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Liu, Xiaoling [Verfasser], Brigitte Akademischer Betreuer] [Gutachter] Voit, and Xinliang [Gutachter] [Feng. "Polymeric Multicompartmentalized Systems Mimicking Artificial Cells for Controllable Multiple Enzymatic Cascade Reactions / Xiaoling Liu ; Gutachter: Brigitte Voit, Xinliang Feng ; Betreuer: Brigitte Voit." Dresden : Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2017. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-230515.

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Bibouche, Bachir [Verfasser], Dieter [Akademischer Betreuer] Vogt, Reinhard [Akademischer Betreuer] Schomäcker, Dieter [Gutachter] Vogt, Reinhard [Gutachter] Schomäcker, and Paul [Gutachter] Kamer. "Catalytic hydroformylation reactions in liquid-liquid multiphase systems with polymer particles and without phase transfer agents / Bachir Bibouche ; Gutachter: Dieter Vogt, Reinhard Schomäcker, Paul Kamer ; Dieter Vogt, Reinhard Schomäcker." Berlin : Technische Universität Berlin, 2019. http://d-nb.info/1200467051/34.

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Schmidt, Marcel [Verfasser], Reinhard [Akademischer Betreuer] Schomäcker, Reinhard [Gutachter] Schomäcker, and Dieter [Gutachter] Vogt. "Development of sustainable reaction systems for the palladium-catalyzed methoxy- and hydroxycarbonylation of alkenes: Boon and bane of multiphase systems / Marcel Schmidt ; Gutachter: Reinhard Schomäcker, Dieter Vogt ; Betreuer: Reinhard Schomäcker." Berlin : Technische Universität Berlin, 2019. http://d-nb.info/1202071481/34.

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Vogt, Andreas Günter Heinz [Verfasser], Peter [Gutachter] Reiter, Andreas [Gutachter] Zilges, and Rolf-Dietmar [Gutachter] Herzberg. "Multinucleon-Transfer Reactions as a Gateway to Neutron-Rich Actinides and Nuclei near the N=82 and Z=50 Shell Closures / Andreas Günter Heinz Vogt ; Gutachter: Peter Reiter, Andreas Zilges, Rolf-Dietmar Herzberg." Köln : Universitäts- und Stadtbibliothek Köln, 2017. http://d-nb.info/114016483X/34.

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Books on the topic "Voigt reaction"

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Boutin, Aimée. Aural Flânerie. University of Illinois Press, 2017. http://dx.doi.org/10.5406/illinois/9780252039218.003.0002.

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This chapter establishes that scholarly approaches to flâneurs have downplayed the broader impact of the urban experience on the senses and underappreciated their aural acuity. From the type's early formulations by Honoré de Balzac, Auguste de Lacroix, and Victor Fournel, the flâneur is attuned to city sounds, and flâneur-writing arranges them to portray the city as concert. The art of flânerie consists of transforming the empirical confusion of city sounds into a unified musical composition. As the clamor of the streets promoted selective hearing, street musicians were targeted as major contributors to the city as concert. Close readings of verbal and visual sketches by Delphine de Girardin, Maria d'Anspach, Bertall, and Old Nick show that class-biased ideas about concert music influenced their often humorous reactions to street noise; nevertheless, the neurasthenic bourgeois ear was often less than receptive to the intrusive noise of foreign street performers. In contrast, Victor Fournel waxed enthusiastic about the people's love of music. A close reading of his Ce qu'on voit dans les rues de Paris makes sense of his distinctive appreciation for street music.
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Conference papers on the topic "Voigt reaction"

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Shourijeh, Mohammad Sharif, and John McPhee. "Efficient Hyper-Volumetric Contact Dynamic Modelling of the Foot Within Human Gait Simulations." In ASME 2013 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/detc2013-13446.

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This study describes the development of a multi-body foot contact model consisting of spherical volumetric models for the surfaces of the foot. The developed model is two-dimensional, and consists of two segments, the hind-foot, mid-foot, and forefoot as one rigid body and the phalanges collectively as the second rigid body. The model has four degrees of freedom: ankle x, y, hind-foot orientation, and metatarsal joint angle. Both ankle and metatarsal joints are assumed to be revolute joints. Three different types of contact elements are targeted: Kelvin-Voigt, linear volumetric, and nonlinear volumetric. The models are kinematically driven at the ankle and the metatarsal joints, and simulated horizontal and vertical ground reaction forces as well as center of pressure location are compared against the measured quantities within a complete human gait cycle. The hyper-volumetric foot contact model was found to be a suitable choice for foot/ground interaction modelling within human gait simulations.
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