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Littérature scientifique sur le sujet « ZERODHA »

Auteur : Grafiati

Publié le 13 février 2024

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Articles de revues sur le sujet "ZERODHA"

Yadav, Sudhanshu, Dr Rachna Jawa, Rahul Kabra et Ria Aggarwal. « INVESTMENT TECH : THE RISE OF DISCOUNT BROKERS IN INDIA ». International Journal of Research -GRANTHAALAYAH 10, n^o 3 (15 avril 2022) : 176–93. http://dx.doi.org/10.29121/granthaalayah.v10.i3.2022.4544.

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This paper analyzes the emergence of discount retail investment platforms in India which have disrupted the Fintech landscape of the country, especially for the traditional brokerages, by presenting a technologically cost-efficient solution to the general public. Through this expository paper, the aim is to highlight the rising prominence of discount brokerages and their role in revolutionizing the Indian stock market. This analytical study endeavours to decipher the key reasons for the shift of retail investors to discount brokers recently and uses time-series data from 2013-14 to 2020-21 to gauge the strength of the relationship between mobile and internet-based trading and the broking leaders, like Zerodha.

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Burge, J. H., T. Peper et S. F. Jacobs. « Thermal Expansion of Borosilicate Glass, Zerodur, Zerodur M, and Uncer amized Zerodur at Low Temperatures ». Applied Optics 38, n^o 34 (1 décembre 1999) : 7161. http://dx.doi.org/10.1364/ao.38.007161.

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Pierre des Ammbrois, Stefano De, Ingrid Corazzari, Olivier Damiano, Laurence Cornillon, Andrea Terenzi, Valentina Casalegno et Monica Ferraris. « Adhesive Joining of Zerodur–CFRP–Zerodur Sandwich Structures for Aerospace Applications ». Macromolecular Materials and Engineering 305, n^o 12 (12 octobre 2020) : 2000464. http://dx.doi.org/10.1002/mame.202000464.

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Zerova, M., L. Seryogina et Yu Karimpour. « New Species of the Chalcidoid Wasps of the Families Eurytomidae and Torymidae (Hymenoptera, Chalcidoidea) from Iran ». Vestnik Zoologii 42, n^o 6 (1 janvier 2008) : e101-e108. http://dx.doi.org/10.2478/v10058-008-0016-0.

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New Species of the Chalcidoid Wasps of the Families Eurytomidae and Torymidae (Hymenoptera, Chalcidoidea) from Iran Three new species of the Family Eurytomidae (Eurytoma lactucae Zerova, sp. n.; Bruchophagus trjapitzini Zerova, sp. n.; Nikanoria shohadae Zerova, sp. n.) and two species of Family Torymidae (Glyphomerus flavabdomen Zerova, sp. n.; Cryptopristus salviae Zerova, sp. n.) are described from Iran; ten palearctic species from the same Families are indicated for Iranian fauna for the first time (Eurytoma abdita Zerova, E. calicotomae Zerova, Eurytoma robusta Mayr, Bruchophagus astragali Fedoseeva, Adontomerus impolitus Askew et Nieves, Exopristoides hypecoi Zerova et Stojanova, Exopristus trigonomerus Ruschka, Idiomacromerus papaveris (Förster), Glyphomerus aylax Stojanova, Pseudotorymus militarsis (Boheman).

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Mallows, Colin. « The Zeroth Problem ». American Statistician 52, n^o 1 (février 1998) : 1. http://dx.doi.org/10.2307/2685557.

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Mallows, Colin. « The Zeroth Problem ». American Statistician 52, n^o 1 (février 1998) : 1–9. http://dx.doi.org/10.1080/00031305.1998.10480528.

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Collocott, S. J., et G. K. White. « Heat capacity and thermal expansion of Zerodur and Zerodur M at low temperatures ». Cryogenics 31, n^o 2 (février 1991) : 102–4. http://dx.doi.org/10.1016/0011-2275(91)90254-t.

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Ali, Sk Zeeshan, et Subhasish Dey. « Discovery of the zeroth law of helicity spectrum in the pre-inertial range of wall turbulence ». Physics of Fluids 34, n^o 7 (juillet 2022) : 071401. http://dx.doi.org/10.1063/5.0093998.

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We report an unprecedented existence of the zeroth law of helicity spectrum (i.e., the helicity spectrum becomes independent of the wavenumber) in the transition from production range to inertial range, herein termed the pre-inertial range, of wall turbulence. The zeroth law is explained by the superposition effect of the forward joint cascade of energy and helicity caused by twisting and stretching of wall-attached superstructures in an equilibrium layer. The phenomenological model perfectly predicts the zeroth law in the pre-inertial range. Experimental data support the existence of the zeroth law.

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Maslov, V. P. « Zeroth-Order Phase Transitions ». Mathematical Notes 76, n^o 5/6 (novembre 2004) : 697–710. http://dx.doi.org/10.1023/b:matn.0000049669.32515.f0.

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Chan, Chia Yen, Yi Cheng Chen, Chii Rong Yang et Ting Ming Huang. « Effect of Acid Etching Durations on Surface Roughness and Residual Stresses of Lightweight Glass Ceramic ». Applied Mechanics and Materials 284-287 (janvier 2013) : 77–82. http://dx.doi.org/10.4028/www.scientific.net/amm.284-287.77.

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The present study is aimed at investigating the effect of acid etching durations on the surface roughness and birefringence of lightweight mirrors made of ZERODUR® glass ceramic. Four acid etching durations (15, 20, 25 and 30 min) have been chosen at a fixed concentration. By using the photoelasticity, surface profiler and laser microscope, the results before and after acid etching have been obtained. It is found the maximum value of the retardation for the polished lightweight ZERODUR® mirror is up to 30 nm. In addition, residual stresses induced by the grinding process with an average grain size of 149 μm are relived after removing ZERODUR® material of a thickness of 60 μm.

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Thèses sur le sujet "ZERODHA"

Masud, Muhammad Mubeen. « Zeroth Order Resonator (ZOR) Based RFID Antenna Design ». Diss., North Dakota State University, 2014. https://hdl.handle.net/10365/27485.

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Meander-line and multi-layer antennas have been used extensively to design compact UHF radio frequency identification (RFID) tags; however the overall size reduction of meander-line antennas is limited by the amount of parasitic inductance that can be introduced by each meander-line segment, and multi-layer antennas can be too costly. In this study, a new compact antenna topology for passive UHF RFID tags based on zeroth order resonant (ZOR) design techniques is presented. The antenna consists of lossy coplanar conductors and either inter-connected inter-digital capacitor (IDC) or shunt inductor unit-cells with a ZOR frequency near the operating frequency of the antenna. Setting the ZOR frequency near the operating frequency is a key component in the design process because the unit-cells chosen for the design are inductive at the operating frequency. This makes the unit-cells very useful for antenna miniaturization. These new designs in this work have several benefits: the coplanar layout can be printed on a single layer, matching inductive loops that reduce antenna efficiency are not required and ZOR analysis can be used for the design. Finally, for validation, prototype antennas are designed, fabricated and tested.

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Adusumilli, Pallavi. « Effects of Mutual Coupling on Zeroth Order Resonator (ZOR) Antennas ». University of Cincinnati / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1459439568.

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Otoboni, José Antonio. « Estudo da usinabilidade do ZERODUR® no torneamento de ultraprecisão com ferramenta de diamante de ponta única ». Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/18/18146/tde-31102013-171149/.

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Alguns espelhos usados em câmeras de satélite devem apresentar qualidade superficial elevada. Eles são normalmente fabricados em ZERODUR®, um material vitrocerâmico, por meio de processos abrasivos. Observou-se que a qualidade da superfície do material deteriora-se algum tempo após a usinagem, necessitando assim de retrabalho. A causa mais influente desse fenômeno é o crescimento de trincas devido à corrosão sobtensão. Estas trincas são geradas pelas condições impostas nos processos convencionais de lapidação e polimento. Este trabalho apresenta um estudo sobre a usinabilidade do ZERODUR® utilizando torneamento de ultraprecisão com ferramenta de diamante de ponta única como uma alternativa a estes métodos tradicionais. Amostras de ZERODUR® foram submetidas a testes de indentação e riscamento a fim de se estudar as propriedades mecânicas do material, a transição dúctil-frágil e os mecanismos de remoção de material. Com base nesses testes, foi delineado um experimento fatorial do tipo 23 para avaliar a influência das seguintes variáveis de usinagem: profundidade de corte, nos níveis 0,4 e 0,2 \'mü\'m, taxa de avanço, nos níveis 0,3 e 0,1 \'mü\'m/rev e ângulo de saída da ferramenta, nos níveis -5º e -20º. As amostras do experimento foram usinadas em um torno de ultraprecisão com a ferramenta de diamante de ponta única. A qualidade superficial de cada combinação foi avaliada por microscopia eletrônica de varredura e perfilometria óptica interferométrica. Os resultados dos experimentos foram analisados estatisticamente, por meio de análise de variância (ANOVA). Para os intervalos das variáveis testadas verificou-se que o ângulo de inclinação da ferramenta é o que mais afeta a qualidade superficial. Ângulos com inclinações mais negativas (-20º) proporcionaram as melhores qualidades superficiais (em torno de 200 nm). Nos resultados não houve evidência de que o corte do material tenha ocorrido dentro do regime dúctil. Porém, a rugosidade superficial encontrada em algumas combinações de corte sugere que o torneamento de ultraprecisão pode ser uma alternativa ao processo lapidação que antecede o polimento. Este trabalho de caráter exploratório contribui com estimativas de alguns parâmetros ótimos para usinagem do ZERODUR®, fornecendo subsídios para pesquisas futuras sobre este tema.
Some mirrors used in satellite cameras must present a high surface quality. They are usually made of ZERODUR®, a brittle glass ceramic, by means of abrasive processes. It was observed that the surface quality of the material deteriorates some time after the machining, thus requiring rework. The most influential cause of this phenomenon is the crack growth due to stress corrosion. These cracks are generated by the conventional machining processes of lapping and polishing. This work presents a study on the machinability of ZERODUR® using ultraprecision turning with single-point diamond tool as an alternative to these traditional methods. ZERODUR® samples were subjected to indentation and nano-scratching tests in order to study the ductile-brittle transition and material removal mechanisms. After that, a \'2 POT.3\' factorial experiment was designed in order to assess the influence of three machining parameters on the resulting surface roughness, which are: depth of cut (tested at levels 0,4 and 0,2 \'mü\'m), feed rate (tested at levels 0,3 and 0,1 \'mü\'m/rev) and rake angle of the cutting tool (tested at levels -5º e -20º). The samples were turned with single-point diamond tool using different combinations of the parameters at the levels described above. The surface quality of each sample was evaluated using an interferometric optical profiler and a scanning electron microscope (SEM). The results of the experiments were statistically evaluated by means of Analysis Of Variance (ANOVA). For the ranges tested, it was found that the rake angle of the tool was the most influential parameter. The angle of -20º provided the best values for surface quality, which were around 200 nm. There was no evidence that the cut of the material occurred in the ductile regime, however, the obtained surface roughness showed that the ultraprecision turning may be a feasible alternative for the lapping process of optical components. This exploratory research contributes to the existing knowledge by providing estimates for optimal parameters of ZERODUR® machining, furnishing empirical basis for future research in this field.

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Haggans, Charles Wesley. « Polarization properties of zeroth order surface-relief gratings with application to optical storage heads ». Diss., The University of Arizona, 1992. http://hdl.handle.net/10150/186030.

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A rigorous model for treating diffraction from arbitrary profile surface-relief gratings is developed. This model is valid for conical incidence geometries and elliptically polarized incident beams. The model is based on the coupled-wave method of Moharam and Gaylord (J. Opt. Soc. Am. 73, 1105-1112 (1983); J. Opt. Soc. Am. 72, 1385-1392 (1982)). The slow convergence of this model for p polarized incident light is analyzed. The source of this slow convergence is determined to be the use of Fourier series expansions for the permittivity and fields in the grating region. The polarization and energy distribution properties of zeroth order gratings are summarized. Designs are presented for zeroth order gratings that function as retardation and polarization conversion elements for specularly reflected beams. Photoresist gratings are fabricated and characterized by ellipsometric techniques to confirm the predictions of the coupled-wave model and to demonstrate these novel designs. The application of zeroth order gratings to optical storage heads is discussed, and novel head designs based on these components are presented.

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Zhao, Bo. « Composite Right/Left-Handed (CRLH) Microstrip Resonant Antennas ». University of Cincinnati / OhioLINK, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1123784412.

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Henault, Bastien. « Identification des processus physico-chimiques à l’origine des défauts locaux des surfaces polies optique et superpolies ». Thesis, Université Clermont Auvergne‎ (2017-2020), 2018. http://www.theses.fr/2018CLFAC090.

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Ce travail de thèse porte sur l’étude des mécanismes physico-chimiques mis en jeu lors du polissage mécano-chimique du Zerodur® (vitrocéramique) par un abrasif à base d’oxydes de cérium. Les défauts obtenus à l’issu du polissage ont été caractérisés en microscopie optique et par microscopie à force atomique (AFM). Il en ressort deux principales populations, à savoir des rayures de type « fines » (longitudinales et continues) causées par des débris de matière polie. La seconde est la typologie « rayure éclat » (fractures perpendiculaires au sens de la rayure) causées par des agglomérats d’abrasif. Des analyses en spectroscopie RX de l’abrasif montrent une augmentation du ratio Ce3+/Ce4+ après la phase de polissage, confirmant la part chimique du polissage du Zerodur®. Des analyses de potentiel zêta ont été menées sur ces mêmes abrasifs et montrent une évolution de la charge de surface des particules abrasives. Des observations AFM montrent que plus la part Ce4+ est importante et meilleure est la qualité finale de la surface polie. La surface polie a également été sondée en ToF-SIMS. Il en ressort la présence d’une couche enrichie en cérium de plusieurs dizaines de nanomètres, lieu de la réaction mécano-chimique de polissage. Plus précisément, cette réaction semble avoir lieu dans la phase vitreuse du Zerodur®
This PhD work focuses on the study of the physicochemical mechanisms involved in the chemical-mechanical polishing of Zerodur® (glass-ceramics) with an abrasive based on cerium oxides. The defects observed after polishing were characterized by optical microscopy and atomic force microscopy (AFM). Two main populations were observed, namely "fine" (longitudinal and continuous stripes) caused by debris of polished material. The second is called "scratch" (perpendicular fractures) caused by abrasive agglomerates. RX spectroscopic analyzes of the abrasive showed an increase in the Ce3+/ Ce4+ ratio after the polishing phase. This point confirms the chemical part of Zerodur® polishing. Zeta potential analyzes were carried out on these same abrasives and show an evolution of the abrasive surface charge. AFM observations show that the higher the Ce4+ concentration, the better the final polished surface quality. The polished surface was also probed with ToF-SIMS analyzes. This shows the presence of a cerium-enriched layer of several tens of nanometers, which may be a site for the chemical-mechanical polishing reaction. More precisely, this reaction seems to take place in the glassy phase of Zerodur®

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Hansen, Glenn Alexander. « TWO ULTRAPRECISE THERMAL EXPANSION INVESTIGATIONS : SODIUM SILICATE - A LOW-EXPANSION CEMENT, AND THERMAL EXPANSION UNIFORMITY OF ZERODUR ». Thesis, The University of Arizona, 1985. http://hdl.handle.net/10150/291814.

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Shi, Ruirong. « Zeroth-Order Resonator (ZOR) Antenna Using Composite Right/Left-Handed (CRLH ) Microstrip Transmission Line (TL) ». University of Cincinnati / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1301714086.

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Lobos, Fernández Mauricio [Verfasser]. « Homogenization and materials design of mechanical properties of textured materials based on zeroth-, first- and second-order bounds of linear behavior / Mauricio Lobos Fernández ». Karlsruhe : KIT Scientific Publishing, 2018. http://www.ksp.kit.edu.

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Okyay, Ahmet. « Sliding Mode Control Algorithm Development For Anti-lock Brake System ». Master's thesis, METU, 2011. http://etd.lib.metu.edu.tr/upload/12613568/index.pdf.

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In this thesis, a sliding mode controller employing a new sliding surface for antilock brake system (ABS) is proposed, its stability is proven formally and its performance is compared with existing sliding mode controllers. The new sliding mode controller uses the integral-derivative surface, which includes error, its derivative and its integral, all at the same time. This and the already existing derivative surface, which includes error and its derivative only, are named zerothorder sliding surfaces. Their stability analysis is done using first-order auxiliary surfaces. Auxiliary surfaces equal the sliding surfaces when derivative of the error becomes zero. The first-order error surface, which includes only the error, and the integral surface, which includes error and its integral, were also designed for comparison. During design, tire brake force response is modelled as an uncertainty. Controllers are simulated on a road with an abrupt change in road coefficient of adhesion. Controller parameters used are optimized, which results in comparable stopping distances while braking on a constant coefficient of adhesion road. Effect of first order actuator dynamics with varying time constants and actuator absolute time delay were considered. Reaching and sliding properties of controllers were also investigated, using results on a constant coefficient of adhesion road. It is observed that zeroth-order sliding surfaces give smoother response for both derivative and integral-derivative cases. As the controllers employing error and derivative surfaces get unstable in the presence of actuator time delay, the integral-derivative surface, proposed in this study, stands as the best controller.

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Livres sur le sujet "ZERODHA"

Stibitz, George R. The zeroth generation. [S.l : Privately printed], 1993.

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George C. Marshall Space Flight Center., dir. Proof test diagrams for Zerodur glass-ceramic. [Marshall Space Flight Center, Ala.] : National Aeronautics and Space Administration, George C. Marshall Space Flight Center, 1991.

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United States. National Aeronautics and Space Administration. Scientific and Technical Information Division., dir. Fracture toughness and crack growth of Zerodur. [Washington, DC] : National Aeronautics and Space Administration, Office of Management, Scientific and Technical Information Division, 1990.

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Golumbic, Martin Charles, et André Sainte-Laguë. The Zeroth Book of Graph Theory. Cham : Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-61420-1.

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Mikage. The empty box and zeroth Maria. New York, NY : Yen Press, 2018.

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ill, 415, et Baker Luke translator, dir. The empty box and zeroth Maria. New York, NY : Yen Press, 2018.

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Mikage. The empty box and zeroth Maria. New York, NY : Yen Press, 2017.

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Andrew, Setzer, et George C. Marshall Space Flight Center., dir. Effects of water on the strength of Zerodur. [Marshall Space Flight Center, Ala.] : George C. Marshall Space Flight Center, 1991.

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Yosef, Ḥaver, dir. Hagadah shel Pesaḥ : ʻim beʾur Zeroʻa neṭuyah. Yerushalayim : Ahavat shalom, 2002.

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Yosef, Ḥaver, et Manoaḥ Hendil d. 1612, dir. Hagadah shel Pesaḥ : ʻim beʼur Zeroʻa neṭuyah. Yerushala[y]im : Ahavat shalom, 2002.

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Chapitres de livres sur le sujet "ZERODHA"

Dorlas, Teunis C. « The Zeroth Law ». Dans Statistical Mechanics, 3–6. 2^e éd. Second edition. | Boca Raton : CRC Press, 2021. : CRC Press, 2021. http://dx.doi.org/10.1201/9781003037170-3.

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Tahir-Kheli, Raza. « Introduction and Zeroth Law ». Dans General and Statistical Thermodynamics, 1–21. Berlin, Heidelberg : Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-21481-3_1.

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Kumar, Shiv. « Zeroth Law of Thermodynamics ». Dans Thermal Engineering Volume 1, 95–107. Cham : Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-67274-4_2.

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Gunther, Neil J. « Time—The Zeroth Performance Metric ». Dans Analyzing Computer System Performance with Perl ::PDQ, 37–81. Berlin, Heidelberg : Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-22583-3_3.

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Gunther, Neil J. « Time—The Zeroth Performance Metric ». Dans Analyzing Computer System Performance with Perl ::PDQ, 3–46. Berlin, Heidelberg : Springer Berlin Heidelberg, 2005. http://dx.doi.org/10.1007/978-3-540-26860-4_1.

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Tahir-Kheli, Raza. « Introduction and the Zeroth Law ». Dans General and Statistical Thermodynamics, 185–222. Cham : Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-20700-7_5.

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Tahir-Kheli, Raza. « Definitions and the Zeroth Law ». Dans General and Statistical Thermodynamics, 1–18. Cham : Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-20700-7_1.

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Golumbic, Martin Charles, et André Sainte-Laguë. « IX Knight’s tour ». Dans The Zeroth Book of Graph Theory, 71–76. Cham : Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-61420-1_10.

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Golumbic, Martin Charles, et André Sainte-Laguë. « I Introduction and definitions ». Dans The Zeroth Book of Graph Theory, 7–13. Cham : Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-61420-1_2.

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Golumbic, Martin Charles, et André Sainte-Laguë. « V Cubic graphs ». Dans The Zeroth Book of Graph Theory, 39–44. Cham : Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-61420-1_6.

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Actes de conférences sur le sujet "ZERODHA"

Westerhoff, T., M. Davis, P. Hartmann, T. Hull et R. Jedamzik. « Lightweighted ZERODUR for telescopes ». Dans SPIE Astronomical Telescopes + Instrumentation, sous la direction de Ramón Navarro, Colin R. Cunningham et Allison A. Barto. SPIE, 2014. http://dx.doi.org/10.1117/12.2054760.

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Campbell, Eugene W., Lifeng Li et Raymond K. Kostuk. « Zeroth-order effective medium theory of zeroth-order volume gratings ». Dans SPIE's 1995 International Symposium on Optical Science, Engineering, and Instrumentation, sous la direction de Tomasz Jannson. SPIE, 1995. http://dx.doi.org/10.1117/12.221243.

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Jacobs, S. F., et D. Bass. « Improved dimensional stability of Corning 9600 and Schott Zerodur glass ceramics ». Dans OSA Annual Meeting. Washington, D.C. : Optica Publishing Group, 1989. http://dx.doi.org/10.1364/oam.1989.thf2.

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Schott Zerodur and Corning 9600 are newly developed glass ceramics designed for high stability structures such as large mirror substrates. In early production these materials suffered from failure to return to length on thermal cycling, which can result in undesirable length and surface figure changes.1 Recently, these materials have been greatly improved by their manufacturers. We present thermal expansion measurements of three vintages of both materials as they were cycled, at least twice, over the 100-475 K temperature range. Thermal equilibrium was obtained after every 25 K temperature increment. The newest Zerodur, called Zerodur M, is virtually free from hysteresis. However, to make this possible the general shape of its cte vs temperature curve has been greatly changed from that of standard Zerodur. (This leads us to wonder whether its homogeneity has suffered). The 9600 material still exhibits a few ppm of hysteresis, but compared with Zerodur M, 9600 maintains its low expansivity to much lower temperatures (100 K).

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Ruch, Eric, Stéphanie Behar-Lafenetre, Thierry Lasic, Roger Viale, Jean-Claude Mathieu, Michel Tarreau et Pierre Etcheto. « Highly light-weighted ZERODUR mirrors ». Dans International Conference on Space Optics 2008, sous la direction de Josiane Costeraste, Errico Armandillo et Nikos Karafolas. SPIE, 2017. http://dx.doi.org/10.1117/12.2308286.

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Jedamzik, R., et T. Westerhoff. « ZERODUR TAILORED for cryogenic application ». Dans SPIE Astronomical Telescopes + Instrumentation, sous la direction de Ramón Navarro, Colin R. Cunningham et Allison A. Barto. SPIE, 2014. http://dx.doi.org/10.1117/12.2055086.

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Morian, Hans F., Peter Hartmann, Ralf Jedamzik et Hartmut W. Hoeness. « ZERODUR for large segmented telescopes ». Dans Astronomical Telescopes and Instrumentation, sous la direction de Jacobus M. Oschmann et Larry M. Stepp. SPIE, 2003. http://dx.doi.org/10.1117/12.458599.

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Jedamzik, Ralf, Clemens Kunisch et Thomas Westerhoff. « ZERODUR : progress in CTE characterization ». Dans SPIE Optical Engineering + Applications, sous la direction de Howard A. MacEwen et James B. Breckinridge. SPIE, 2013. http://dx.doi.org/10.1117/12.2022445.

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Carré, A., Tony B. Hull, A. Schüller, J. Krieg et T. Westerhoff. « ZERODUR stability in space environments ». Dans International Conference on Space Optics — ICSO 2021, sous la direction de Zoran Sodnik, Bruno Cugny et Nikos Karafolas. SPIE, 2021. http://dx.doi.org/10.1117/12.2599814.

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Jedamzik, Ralf, Clemens Kunisch et Thomas Westerhoff. « ZERODUR for stress mirror polishing ». Dans SPIE Optical Engineering + Applications, sous la direction de James H. Burge, Oliver W. Fähnle et Ray Williamson. SPIE, 2011. http://dx.doi.org/10.1117/12.894421.

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Tesar, A., et B. Fuchs. « Zerodur Polishing Process for High Surface Quality and High Efficiency* ». Dans Optical Fabrication and Testing. Washington, D.C. : Optica Publishing Group, 1992. http://dx.doi.org/10.1364/oft.1992.wb9.

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Résumé :

Zerodur [1] is a glass-ceramic composite of technical importance in applications where temperature instabilites influence optical and mechanical performance. For example, it has been extensively used for earthbound and spaceborne telescope mirror substrates. Polished Zerodur surfaces of high quality have been required for laser gyro mirrors. Recent studies of optics in high power laser applications have indicated that the polished surface quality of substrates affects performance of high reflection coatings [2,3]. Thus, the interest in improving Zerodur polished surface quality has become more general. Beyond eliminating subsurface damage, high quality surfaces are produced by reducing the amount of hydrated material redeposited on the surface during polishing [4]. With the proper control of polishing parameters, such surfaces exhibit roughnesses of <1Å rms. It has been our goal to study Zerodur polishing to recommend a high surface quality polishing process which could be easily adapted to standard planetary continuous polishing machines and spindles. This summary contains information on a polishing process developed at LLNL which reproducibly provides high quality polished Zerodur surfaces at very high polishing efficiencies. A continuation of work is planned to more fully understand the polishing behaviors.

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Rapports d'organisations sur le sujet "ZERODHA"

Farkhondeh M. et V. Ptitsyn. eRHIC Zeroth ? Order Design Report. Office of Scientific and Technical Information (OSTI), mars 2004. http://dx.doi.org/10.2172/1061734.

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Raubenheimer, T. O. Zeroth-order design report for the next linear collider. Volume 1. Office of Scientific and Technical Information (OSTI), mai 1996. http://dx.doi.org/10.2172/257432.

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Raubenheimer, T. O. Zeroth-order design report for the next linear collider. Volume 2. Office of Scientific and Technical Information (OSTI), mai 1996. http://dx.doi.org/10.2172/257436.

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BURKARDT, JOHN, MAX GUNZBURGER, JANET PETERSON et REBECCA M. BRANNON. User Manual and Supporting Information for Library of Codes for Centroidal Voronoi Point Placement and Associated Zeroth, First, and Second Moment Determination. Office of Scientific and Technical Information (OSTI), février 2002. http://dx.doi.org/10.2172/793224.

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