Bibliografie tematiche / KTaO₃

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Letteratura scientifica selezionata sul tema "KTaO₃"

Autore: Grafiati
Pubblicato: 16 novembre 2024

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Articoli di riviste sul tema "KTaO₃"

1

Wu, Ning, Xue-Jing Zhang e Bang-Gui Liu. "Strain-enhanced giant Rashba spin splitting in ultrathin KTaO3 films for spin-polarized photocurrents". RSC Advances 10, n. 72 (2020): 44088–95. http://dx.doi.org/10.1039/d0ra08745a.

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Strong Rashba effects at semiconductor surfaces and interfaces have attracted attention for exploration and applications. We show with first-principles investigation that applying biaxial stress can cause tunable and giant Rashba effects in ultrathin KTaO3 (KTO) (001) films.
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2

Bajorowicz, B., J. Reszczyńska, W. Lisowski, T. Klimczuk, M. Winiarski, M. Słoma e A. Zaleska-Medynska. "Perovskite-type KTaO3–reduced graphene oxide hybrid with improved visible light photocatalytic activity". RSC Advances 5, n. 111 (2015): 91315–25. http://dx.doi.org/10.1039/c5ra18124k.

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Novel rGO–KTaO3 composites with various graphene content were successfully synthesized using a facile solvothermal method which allowed both the reduction of graphene oxide and loading of KTaO3 nanocubes on the graphene sheets.
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Tong, Lei, Jie Sun, Shuting Wang, Youmin Guo, Qiuju Li, Hong Wang e Chunchang Wang. "Normal and abnormal dielectric relaxation behavior in KTaO3 ceramics". RSC Advances 7, n. 80 (2017): 50680–87. http://dx.doi.org/10.1039/c7ra09866a.

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Wang, Yaqin, Jianli Cheng, Maziar Behtash, Wu Tang, Jian Luo e Kesong Yang. "First-principles studies of polar perovskite KTaO3 surfaces: structural reconstruction, charge compensation, and stability diagram". Physical Chemistry Chemical Physics 20, n. 27 (2018): 18515–27. http://dx.doi.org/10.1039/c8cp02540a.

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Hagiwara, Hidehisa, Ittoku Nozawa, Katsuaki Hayakawa e Tatsumi Ishihara. "Hydrogen production by photocatalytic water splitting of aqueous hydrogen iodide over Pt/alkali metal tantalates". Sustainable Energy & Fuels 3, n. 11 (2019): 3021–28. http://dx.doi.org/10.1039/c9se00355j.

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6

Xu, Shaowen, Fanhao Jia, Shunbo Hu, Athinarayanan Sundaresan, Nikita V. Ter-Oganessian, Alexander P. Pyatakov, Jinrong Cheng, Jincang Zhang, Shixun Cao e Wei Ren§. "Predicting the structural, electronic and magnetic properties of few atomic-layer polar perovskite". Physical Chemistry Chemical Physics 23, n. 9 (2021): 5578–82. http://dx.doi.org/10.1039/d0cp06671k.

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7

Laguta, V. V., M. D. Glinchuk, I. P. Bykov, A. Cremona, P. Galinetto, E. Giulotto, L. Jastrabik e J. Rosa. "Shallow traps in pure KTaO 3 crystals". Radiation Effects and Defects in Solids 157, n. 6-12 (gennaio 2002): 721–27. http://dx.doi.org/10.1080/10420150215786.

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8

Potůček, Z., Z. Bryknar e J. Schulz. "Thermoluminescence of nominally pure KTaO 3 crystals". Radiation Effects and Defects in Solids 157, n. 6-12 (gennaio 2002): 1021–24. http://dx.doi.org/10.1080/10420150215827.

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9

Chen, Jikun, Xinyou Ke, Jiaou Wang, Takeaki Yajima, Haijie Qian e Song Sun. "Dipole-correlated carrier transportation and orbital reconfiguration in strain-distorted SrNbxTi1−xO3/KTaO3". Physical Chemistry Chemical Physics 19, n. 44 (2017): 29913–17. http://dx.doi.org/10.1039/c7cp06495k.

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Abstract (sommario):
A distinct transportation characteristic of conduction band splitting is achieved by coupling the carriers with randomly distributed lattice-dipoles for strain-distorted SrNbxTi1−xO3/KTaO3.
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10

Gupta, Anshu, Ajit Singh, Chandan Bera e Suvankar Chakraverty. "Light-matter interaction of the polar-polar interface LaVO3-KTaO3 (111)". Journal of Physics: Conference Series 2518, n. 1 (1 giugno 2023): 012009. http://dx.doi.org/10.1088/1742-6596/2518/1/012009.

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Abstract (sommario):
KTaO3 (KTO) has emerged as a potential candidate in the spintronics block showing the emergent phenomena in its bulk form as well as thin films, especially in KTO-based heterostructures and interfaces. In this work, we have grown a thin film of polar Mott insulator LaVO3 (LVO) on polar band insulator KTO (111) using the pulsed laser deposition technique. This interfce shows the insulator-to-metal transition. We have studied the photoelectrical properties by using a blue laser light of wavelength 405 nm for illumination in temperatures ranging from 76 K and 300 K. Under blue light illumination, the interface shows enhancement in conductivity, for both 76 K to 300 K. This system has shown the persistent photoconductivity as well. Further, electrostatic gating has also been applied to tune the charge carrier density and the conductivity is increased by around 23 % under the effect of light and electrostatic gating.
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Tesi sul tema "KTaO₃"

1

KLEIN, SAINT-ANDRE REGINE KUGEL G. "CONTRIBUTION EXPERIMENTALE ET THEORIQUE A L'ETUDE DES PROPRIETES STRUCTURALES, DYNAMIQUES ET PHOTOCONDUCTRICES DANS KTAO#3 DOPE AU LI /". [S.l.] : [s.n.], 1994. ftp://ftp.scd.univ-metz.fr/pub/Theses/1994/Klein.Regine.SMZ9437.pdf.

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2

Gubaev, Airat. "Light-induced absorption changes in ferroelectric crystals SrxBa1-xNb2O6:Ce; KTaO3; KTa1-xNbxO3 /". [S.l.] : [s.n.], 2005. http://deposit.ddb.de/cgi-bin/dokserv?idn=980219035.

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3

Raji, Aravind. "Exploring the electronic and structural properties of tantalates and infinite-layer nickelates via electron microscopy and x-ray spectroscopy approaches". Electronic Thesis or Diss., université Paris-Saclay, 2024. http://www.theses.fr/2024UPASP116.

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Les systèmes de matériaux tels que les oxydes de métaux de transition (TMO) présentent des fonctionnalités robustes, fortement liées à leurs degrés de liberté électroniques et structurels. Il est possible de stabiliser de nouvelles structures TMO présentant de nouvelles propriétés en contrôlant ces degrés de liberté, comme c'est le cas des nickelates supraconducteurs à couche infinie (IL), des gaz d'électrons bidimensionnels (2DEG) dans le KTaO₃, etc. Dans cette thèse, une combinaison de techniques complémentaires a été employée, à savoir la microscopie électronique à transmission à balayage (STEM), la spectroscopie de perte d'énergie électronique (EELS), la microscopie électronique à quatre dimensions (4D), la spectroscopie de photoémission de rayons X durs (HAXPES), des calculs ab-initio complémentaires et des expériences de diffusion des rayons X pour élucider les origines de la physique complexe présentée par ces systèmes. Cette thèse commence par explorer les origines des ordres concurrents tels que l'ordre de charge périodique 3a₀ dans les IL-nickelates, observés dans les expériences de diffusion des rayons X. Ici, grâce à une analyse combinée avec STEM-EELS, 4D-STEM et HAXPES, cet ordre particulier s'est avéré provenir d'un ordre {303}pc particulier de vacances d'oxygène dans le film mince de nickelate. Une exploration plus poussée a permis de découvrir une nouvelle phase de nickelate coordonnée à trois composants et ordonnée en valence, de formule A₉B₉O₂₂, qui est un intermédiaire entre la pérovskite mère et le nickelate IL réduit. Compte tenu de la contribution possible de la nanostructure de l'interface de la couche mince du substrat à la supraconductivité, une étude combinée avec STEM-EELS, 4D-STEM, HAXPES et des calculs ab-initio de l'interface a été réalisée. Il a été constaté qu'il existe des interfaces de type n et de type p très différentes dans les échantillons supraconducteurs. Cette non-universalité de la nanostructure de l'interface dans les échantillons supraconducteurs de nickelate d'IL a permis de dissocier l'influence de l'interface et la supraconductivité dans les nickelates d'IL. Cela a suscité l'intérêt pour l'étude d'une interface d'oxyde, où l'interface est supraconductrice, et dans la partie suivante, les 2DEGs supraconducteurs dans AlOₓ/KTaO₃ ont été explorés. L'aspect électronique et structurel de l'interface AlOₓ/KTaO₃ contrôlant les 2DEG a été étudié en utilisant STEM-EELS et HAXPES. Une carte de l'espace réel du 2DEG a été obtenue, ainsi que des indications d'une expansion significative de la cellule unitaire dans cette région. La méthode des ondes stationnaires (SW) résolues en couches a également indiqué un déplacement polaire substantiel pour les atomes de Ta réduits à l'interface. Alors que cette thèse explore les aspects structurels et électroniques de systèmes spécifiques, l'approche combinée utilisant les électrons (STEM-EELS, 4D-STEM) et les rayons X (HAXPES) peut être appliquée à une large gamme de systèmes TMO. Elle permet d'élucider les origines des propriétés complexes qu'ils présentent
Material systems such as transition metal oxides (TMO) exhibits robust functionalities, strongly coupled with its electronic and structural degrees of freedom. One can stabilize novel TMO structures hosting novel properties by controlling these degrees of freedom, as is the case of superconducting infinite-layer (IL) nickelates, two-dimensional electron gases (2DEGs) in KTaO₃, etc. In this thesis, a combination of complementary techniques has been employed that is the scanning transmission electron microscopy (STEM)- electron energy loss spectroscopy (EELS), four dimensional (4D)-STEM, hard X-ray photoemission spectroscopy (HAXPES) and complementary ab-initio calculations and X-ray scattering experiments to elucidate the origins of the complex physics exhibited by these systems. This thesis begins by exploring the origins of competing orders such as the 3a₀ periodic charge order in IL-nickelates, observed in X-ray scattering experiments. Here, through a combined analysis with STEM-EELS, 4D-STEM and HAXPES, this particular ordering was found to be originating from a particular {303}pc ordering of oxygen vacancies in the nickelate thin-film. Further exploration resulted in the discovery of a new valence ordered and tri-component coordinated nickelate phase with the formula A₉B₉O₂₂, that is an intermediate between the parent perovskite and reduced IL-nickelate. Considering the possible contribution of the substrate thin film interface nanostructure to the superconductivity, a combined study with STEM-EELS, 4D-STEM, HAXPES and ab-initio calculations of the interface was done. It was found that there are highly different n-type and p-type interfaces exists in superconducting samples. This non-universality of interface nanostructure in superconducting IL-nickelate samples, decoupled the interface influence and superconductivity in IL-nickelates. This generated interest in studying an oxide interface, where the interface is superconducting, and in the followed part, the superconducting 2DEGs in AlOₓ/KTaO₃ was explored. The electronic and structural aspect of the AlOₓ/KTaO₃ interface controlling the 2DEG was studied using STEM-EELS and HAXPES. A real space map of the 2DEG was obtained, along with indications of a significant unit cell expansion in this region. Layer resolved standing wave (SW)-HAXPES also indicated a substantial polar like displacement for the reduced Ta atoms at the interface. While this thesis explores the structural and electronic aspects of specific systems, the combined approach using electrons (STEM-EELS, 4D-STEM) and X-rays (HAXPES) can be applied to a wide range of TMO systems. It can unravel the origins of complex properties exhibited by them
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Zukauskas, Andrius. "QPM Devices in KTA and RKTP". Doctoral thesis, KTH, Laserfysik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-139475.

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Abstract (sommario):
Even though KTiOPO4 (KTP) is considered to be one of the best nonlinear materials for quasi phase matched (QPM) frequency conversion in the visible and the near-infrared spectral regions, its use is often limited by poor material homogeneity, high ionic conductivity, a considerable linear absorption and photochromatic damage. On the other hand, the improved material homogeneity and the lower ionic conductivity of bulk Rb-doped KTP (RKTP) make this material an ideal alternative for fabrication of fine-pitch QPM gratings, while the arsenate isomorph KTiOAsO4 (KTA) promises a better performance in the green spectral region and adds the advantage of a wider transparency window in the infrared. Unfortunately, the available studies on these materials are limited and unable to answer the question whether RKTP and KTA are feasible alternatives to KTP in terms of periodic poling and optical performance. The optical performance of the QPM devices depends on the periodic poling quality, therefore, a detailed comprehension of domain-grating formation in the KTP isomorphs is highly desired. The goals of this thesis were to gain a better understanding of the periodic poling process in the KTP isomorphs, in order to study the specifics of ferroelectric domain engineering in KTA and RKTP, and to evaluate the optical performance of these isomorphs. Fine-pitch periodically poled structures were engineered both in KTA and RKTP crystals. It was demonstrated that QPM gratings with excellent quality and with periods as short as 8.49 μm can be fabricated in KTA crystals. Comparative transmission studies have shown that periodically poled KTA (PPKTA) crystals can be superior to KTP for QPM second harmonic generation in the visible spectral region due to lower linear absorption. It was also demonstrated that RKTP is a superior alternative to KTP for high-quality QPM grating fabrication. A consistent room-temperature periodic poling of 5 mm thick RKTP crystals with a period of 38.86 μm has been achieved. The obtained large aperture periodically poled RKTP (PPRKTP) crystals showed an outstanding QPM grating uniformity and excellent optical performance in optical parametric oscillator (OPO) applications. Moreover, it was shown that RKTP is less susceptible to blue-induced infrared absorption than KTP. Finally, a novel and a relatively simple method for self-assembling quasi-periodic sub-μm scale ferroelectric domain structure in RKTP crystals has been presented. It was shown that, after treatment in aqueous KOH/KNO3 solution, periodic poling of RKTP with planar electrodes resulted in one-dimensional ferroelectric domain structure with an average periodicity of 650±200 nm, extending over the whole 1 mm thick crystal. Such self-assembled structures in RKTP were used to demonstrate 5th order non-collinear QPM backward second harmonic generation.

QC 20140114

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Fahri, Emmanuel. "Etude des anomalies paraélectriques quantiques de pérovskites dérivées de KTaO3". Montpellier 2, 1998. http://www.theses.fr/1998MON20190.

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Les cristaux paraelectriques quantiques sont des dielectriques qui devraient etre ferroelectriques en dessous d'une temperature de curie-weiss t#c. A basse temperature, les fluctuations ferroelectriques sont controlees par un mode critique de vibration transverse optique (to), dit ferroelectrique qui devient mou au centre de la zone de brillouin lorsque la temperature decroit. Mais pour t < t#q t#c, le fort mouvement quantique de point zero de l'ion central (ta dans ktao#3) empeche la condensation du mode ferroelectrique, dont la frequence #t#o se stabilise a basse energie. La constante dielectrique sature a une tres grande valeur, et un fort couplage avec le mode transverse acoustique devient visible. En 1991, k. A. Muller, d'apres une etude rpe, envisage une transition de phase d'un nouveau type dans ces materiaux. B. Hehlen et e. Courtens s'interessent alors aux proprietes basses frequences du srtio#3 et du ktao#3. Les etudes de diffusion neutronique, mais surtout brillouin, montrent alors, parmi les nombreuses anomalies, une nouvelle excitation tres basse frequence, qu'ils attribuent au second son, la propagation ondulatoire de la chaleur. Ce travail presente des resultats nombreux et originaux obtenus en diffusion neutronique et brillouin a basse temperature (5-300 k) dans ktao#3 pour et dope au sodium. Une parametrisation des nappes de phonons dans ktao#3 a servi de base au calcul de la largeur normale des phonons, de la vitesse theorique du second son, dans le cas ou il serait effectivement observable, et du spectre complet de diffusion brillouin par fluctuations de densite de phonons. La comparaison des simulations avec l'experience montre un bon accord pour le calcul des largeurs et des nappes, et le processus physique observe en spectroscopie brillouin est probablement celui de difference de deux phonons. Les differents aspects de la dynamique des phonons basse frequence peuvent etre unifies au sein d'une theorie de diffusion brillouin au second ordre.
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Torgersen, Dale G. "KTO I KUDA? Russia, language, and national identity". Thesis, Monterey, California : Naval Postgraduate School, 2009. http://edocs.nps.edu/npspubs/scholarly/theses/2009/Dec/09Dec%5FTorgersen.pdf.

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Thesis (M.A. in Security Studies (Europe and Eurasia))--Naval Postgraduate School, December 2009.
Thesis Advisor(s): Tsypkin, Mikhail ; Keyser, Boris. "December 2009." Description based on title screen as viewed on January 27, 2010. Author(s) subject terms: Russian Language, Language Policy, Russification, Russia, Russian Federation, Soviet Union, Former Soviet Union, Identity, Nationalist, Nationalism, russkie, rossiianne, Baltic States, Ukraine, Georgia, Moldova, Pushkin, Lermontov, Tolstoy, Romanov Dynasty, Bolsheviks, Communist Party, Lenin, Stalin, Khrushchev, Brezhnev, Gorbachev, Yeltsin, Putin. Includes bibliographical references (p. 31-33). Also available in print.
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Gutmann, Roland. "Liquid phase epitaxy of para- and ferroelectric KTa₁-xNbxO₃ /". Zürich, 1993. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=10095.

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Bareille, Cédric. "Effets d'une brisure de symétrie sur les stuctures électroniques d'URu2Si2 et de KTaO3". Phd thesis, Université Paris Sud - Paris XI, 2013. http://tel.archives-ouvertes.fr/tel-00937625.

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L'étude des symétries d'un système peut en révéler de nombreuses propriétés physiques. La brisure, spontanée ou non, d'une de ces symétries implique alors d'importantes conséquences sur le comportement du système. On le voit dans la description actuelle de la physique des particules, avec notamment la création de la masse, ou dans la physique des solides, domaine de cette thèse, avec l'apparition de phases aux propriétés diverses, comme le magnétisme ou la supraconductivité. Le présent travail étudie par spectroscopie de photoémission résolue en angle (ARPES) les effets d'une brisure de symétrie dans deux systèmes différents : le système de fermions lourds URu2Si2 et l'oxyde de métal de transition (TMO) KTaO3. Le cristal d'URu2Si2 passe d'une phase paramagnétique pour T>THO, sujette à la cohérence de Kondo, vers la phase dite d'ordre caché pour T
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片山, 郁文. "量子常誘電体KTaO3における光励起キャリアダイナミクス". 京都大学 (Kyoto University), 2006. http://hdl.handle.net/2433/144157.

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Kyoto University (京都大学)
0048
新制・課程博士
博士(理学)
甲第12073号
理博第2967号
新制||理||1443(附属図書館)
23909
UT51-2006-J68
京都大学大学院理学研究科物理学・宇宙物理学専攻
(主査)教授 田中 耕一郎, 教授 松田 祐司, 教授 金光 義彦
学位規則第4条第1項該当
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Halperin, Dalia-Ruth. "Haʼiywr bamiqrwgrapiyah beyn ktab lmakḥwl : maḥzwr hamiqrwgrapiyah haqatalaniy ktab yad 8°6527 heb bebeyt haspariym halʼwmiy whaʼwniybersiyṭaʼiy biyrwšalayim = the Catalan micrography Mahzor MS Heb 8°6527 in the Jewish national and university library in Jerusalem /". [Jérusalem] : [s.n.], 2008. http://catalogue.bnf.fr/ark:/12148/cb41424391n.

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Ḥiybwr lqabalat twʼar dwqṭwr--Piylwswpiyah--Jerusalem--Hebrew university, 2008.
Mention parallèle de titre ou de responsabilité : Illuminating in micrography between script and brush : the Catalan micrography Mahzor MS Heb 8°6527 in the Jewish national and university library in Jerusalem / by Dalia-Ruth Halperin. P. de titre en anglais. Résumé en anglais.
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Libri sul tema "KTaO₃"

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Sukʻiasean, Karapet S. Hayrakan ktak. Pēyrutʻ, Libanan: [journal Ararat], 1987.

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G, Dobrenʹkova, a cura di. Kto estʹ kto: 2003. Saratov: Privolzhskoe knizhnoe izd-vo, 2003.

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Ilʹgar, Bagarov, a cura di. Azerbaĭdzhan--kto estʹ kto. Baku: Konsalting & biznes, 1998.

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Gromov, A. V. Neformaly: Kto estʹ kto? Moskva: "Myslʹ", 1990.

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Kruchkin, I︠U︡riĭ. Kto estʹ kto v Mongolii. Moskva: "Bembi San" Khėvlėliĭn Gazar, 2003.

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Mochalova, Elena. Kto estʹ kto v Syzrani. Samara: Navigator-F, 2001.

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Vladimir, Gakov, a cura di. Ėnt͡s︡iklopedii͡a︡ fantastiki: Kto estʹ kto. Minsk: IKO "Galaksias", 1995.

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Sluzhba politicheskoĭ informat͡s︡ii i konsulʹtat͡s︡iĭ "T͡S︡entr" (Moscow, Russia), a cura di. Federalʹnai͡a︡ ėlita: Kto estʹ kto. Moskva: SPIK-t͡s︡entr, 1996.

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1936-, Sokolov V., a cura di. Kto estʹ kto na Altae. Barnaul: RIA "Altapress", 1994.

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Frant︠s︡evna, Beli︠a︡vskai︠a︡ Valentina, Kochetkova P. V e Shubina T. G, a cura di. Kto estʹ kto: Ėnt︠s︡iklopedicheskiĭ spravochnik. Minsk: Literatura, 1997.

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Capitoli di libri sul tema "KTaO₃"

1

Hagiwara, Hidehisa, Hiroshige Matsumoto e Tatsumi Ishihara. "Effects of Dye Mixing on Photocatalytic Splitting of H2O into H2 and O2 on KTaO3". In Materials Science Forum, 51–54. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-431-6.51.

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Bortnick, Kevin. "Kitchen Task Assessment (KTA)". In Occupational Therapy Assessments for Older Adults, 250–51. New York: Routledge, 2024. http://dx.doi.org/10.4324/9781003525288-103.

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Park, Hyejin, e Svetlana Stepchenkova. "Discovering Cultural Differences Through Information Flow of National DMOs Websites". In Information and Communication Technologies in Tourism 2021, 419–25. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-65785-7_40.

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AbstractThe purpose of the study is to investigate whether cultural differences are reflected in how destinations present themselves online by performing hyperlink network analysis of their official DMOs websites. The study examines whether variance in online presentation can be explained using well established theories on culture. To this end, hyperlink data were collected from three official tourism websites: Korea Tourism Organization (KTO) of South Korea, Brand USA of United States, and German National Tourist Board (GNTB) of Germany. The results show that the three hyperlink networks exhibit differences in size and structural properties. The information network of KTO tends to reflect collectivism, while those of Brand USA and GNTB reflect individualism. Blockmodeling analysis provides the grounds for further statistical approach.
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Clemens, Walter C. "Baltic Nationalism and Communism: Kto Kovo?" In Baltic Independence and Russian Empire, 177–220. London: Palgrave Macmillan UK, 1991. http://dx.doi.org/10.1007/978-1-349-12425-1_11.

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Kurisu, Derek. "Honoring the Family of KTA Superstores". In The Value of Hawaii 2, a cura di Aiko Yamashiro e Noelani Goodyear-Kaopua, 75–81. Honolulu: University of Hawaii Press, 2017. http://dx.doi.org/10.1515/9780824840259-014.

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Nataraj, Aroon, Allen D. Malony, Alan Morris e Sameer Shende. "Early Experiences with KTAU on the IBM BG/L". In Euro-Par 2006 Parallel Processing, 99–110. Berlin, Heidelberg: Springer Berlin Heidelberg, 2006. http://dx.doi.org/10.1007/11823285_11.

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Lyzwa, Fryderyk. "Electric Field Effect on SrTiO3- and KTaO3-Based Heterostructures". In Phononic and Electronic Excitations in Complex Oxides Studied with Advanced Infrared and Raman Spectroscopy Techniques, 107–25. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-11866-1_6.

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Meng, Ya, e Navin Kashyap. "The Effect of Malformed Tiles on Tile Assemblies within kTAM". In Lecture Notes in Computer Science, 116–25. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-10604-0_12.

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Sitar, Z., R. Gutmann e P. Günter. "Liquid Phase Epitaxy of Na1-yKyTa1-xNbxO3 on KTaO3 Substrates". In Science and Technology of Electroceramic Thin Films, 187–99. Dordrecht: Springer Netherlands, 1995. http://dx.doi.org/10.1007/978-94-017-2950-5_14.

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Salce, B., e L. A. Boatner. "Low-Temperature Phonon Scattering in “Pure” and Li-Doped KTaO3". In Phonon Scattering in Condensed Matter V, 272–74. Berlin, Heidelberg: Springer Berlin Heidelberg, 1986. http://dx.doi.org/10.1007/978-3-642-82912-3_79.

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Atti di convegni sul tema "KTaO₃"

1

Jr., Jay, e Jeffrey Lewis. "Runway Independent High Speed CarterCopter BizJet". In Vertical Flight Society 73rd Annual Forum & Technology Display, 1–7. The Vertical Flight Society, 2017. http://dx.doi.org/10.4050/f-0073-2017-12301.

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Carter Aviation Technologies, LLC has spent over 20 years developing aircraft concepts utilizing its Slowed Rotor/Compound (SR/C™) technology, a technology that offers VTOL capability with fixed-wing cruise performance in a much simpler and less expensive method than other high speed VTOL approaches, with a rotor always in autorotation in case of emergency. Key to this technology is a rotor and related control system that can be dramatically slowed in flight while remaining stable. Multiple manned demonstrators have demonstrated the feasibility of the technology, as well as provided solid experimental flight test data on performance potential. Carter is now utilizing this technology for a new aircraft concept, the CarterCopter BizJet, to provide runway independent operation with business jet cruise performance, carrying up to nine people at top speeds exceeding 500 mph (435+ ktas or 805+ km/hr). This paper will focus on this new platform, its features, and capabilities.
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Eglitis, R. I., A. V. Postnikov e G. Borstel. "Semi-empirical Hartree-Fock calculations for KNbO 3 and KTaO 3". In International Conference on Advanced Optical Materials and Devices, a cura di Andris Krumins, Donats K. Millers, Andris R. Sternberg e Janis Spigulis. SPIE, 1997. http://dx.doi.org/10.1117/12.266525.

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Nakaoki, Ariyoshi, Takao Kondo, Kimihiro Saito, Masahiro Sasaura e Kazuo Fujiura. "High numerical aperture hemisphere solid immersion lens made of KTaO 3 with wide thickness tolerance". In Contract Proceedings 2006, a cura di Ryuichi Katayama e Tuviah E. Schlesinger. SPIE, 2007. http://dx.doi.org/10.1117/12.685213.

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Liu, Huimin, Weiyi Jia, Yanyung Wang, Y. Fu e Lynn A. Boatner. "Modulation of the nonlinear optical response by KNbO 3 thin films deposited on a KTaO 3 substrate". In 1998 International Conference on Applications of Photonic Technology, a cura di George A. Lampropoulos e Roger A. Lessard. SPIE, 1998. http://dx.doi.org/10.1117/12.328620.

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Bae, I. T., T. Ichinose, M. G. Han, Y. Zhu, S. Yasui e H. Naganuma. "Tensile strain of r-BiFeO3 film grown on KTaO3 substrates". In 2018 International Conference on Solid State Devices and Materials. The Japan Society of Applied Physics, 2018. http://dx.doi.org/10.7567/ssdm.2018.e-4-01.

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Matsubara, E., K. Inoue e E. Hanamura. "Observation of ultra-short laser pulse-induced violation of Raman selection rules in KTaO/sub 3/ and SrTiO/sub 3/". In International Quantum Electronics Conference, 2005. IEEE, 2005. http://dx.doi.org/10.1109/iqec.2005.1560843.

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Eglitis, R. I., V. S. Vikhnin, P. A. Markovin e G. Borstel. "Self-ordered second-component clusters in solid solutions on the basis of ferroelectric perovskites: Nb clusters in KTaO[sub 3]". In The 5th Williamsburg workshop on first-principles calculations for ferroelectrics. AIP, 1998. http://dx.doi.org/10.1063/1.56284.

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Eglitis, R. I., E. A. Kotomin, A. V. Postnikov, N. E. Christensen e G. Borstel. "First-principles and semiempirical Hartree-Fock calculations for F centers in KNbO[sub 3] and Li impurities in KTaO[sub 3]". In The 5th Williamsburg workshop on first-principles calculations for ferroelectrics. AIP, 1998. http://dx.doi.org/10.1063/1.56293.

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Liu, Huimin, Roger J. Reeves, Richard C. Powell e L. A. Boatner. "Orientation dependence of the picosecond nonlinear optical signals in KTa1-xNbxO3 crystals." In Nonlinear Optics. Washington, D.C.: Optica Publishing Group, 1992. http://dx.doi.org/10.1364/nlo.1992.tha4.

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The mixed-crystal system of KTa1-xNbxO3 (KTN) has been the subject of. numerous laser studies due to its promise as a nonlinear optical material. However, the optical properties of KTN crystals change with composition due to different structural phases. As the niobium concentration x increases from 0 (KTaO3) to 1 (KNbO3) the perovskite-structure of KTN undergoes a phase transition from a cubic paraelectric phase to the tetragonal and orthorhombic ferroelectric phases.1-6 Experimental data on these structural changes support a model where the Ta,Nb ions are displaced from central positions in the octahedron of oxygen ions to one of eight equivalent positions along the cube diagonals. The different structural phases are a consequence of the preferential occupation of a certain set of sites by the Ta,Nb ions.1-6
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Liu, H., R. J. Reeves e R. C. Powell. "Picosecond Nonlinear Optical Responses in Photorefractive Crystals". In Photorefractive Materials, Effects, and Devices II. Washington, D.C.: Optica Publishing Group, 1991. http://dx.doi.org/10.1364/pmed.1991.wc1.

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Picosecond-pulse laser excitation was used to establish and probe refractive index gratings in KNbO3, KTaO3, and mixed crystals of KTa1-xNbxO3. The purpose of this work was first to identify the physical processes contributing to fast nonlinear optical responses in these samples, and second to determine how these processes evolve with time into the space-charge field photorefractive effect observed with continuous wave excitation. The techniques of pulse-probe degenerate four-wave mixing and nondegenerate four-wave mixing with a continuous wave probe laser were both employed to obtain information about the photorefractive processes that take place after fast pulse excitation. The measurements were made as a function of laser fluence, crossing angle of the write beams, sample orientation with respect to the grating wavevector, polarization directions of the write and probe beams, and write beam wavelength. Mixed crystals with the niobium concentration parameter x varying from 0 to 1.0 were investigated along with KNbO3 samples containing a variety of dopant ions.
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Rapporti di organizzazioni sul tema "KTaO₃"

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Liu, H., F. Fernandez, W. Jia e L. A. Boatner. Transient grating in a KNbO{sub 3}/KTaO{sub 3} superlattice. Office of Scientific and Technical Information (OSTI), giugno 1998. http://dx.doi.org/10.2172/658429.

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Loiacono, G. M. Preparation of Single Domain KTA Crystals. Fort Belvoir, VA: Defense Technical Information Center, febbraio 1994. http://dx.doi.org/10.21236/ada298861.

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Rose, P. C., e W. J. Naumann. Impulse gage development for the 100-200 ktap range. Office of Scientific and Technical Information (OSTI), luglio 1990. http://dx.doi.org/10.2172/6041185.

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Hatipoglu, Emre, Brian Efird e Saleh Al Muhanna. Spatial Modeling of Bargaining Among Stakeholders in Energy Policy: The Case of Japanese Nuclear Plants. King Abdullah Petroleum Studies and Research Center, febbraio 2023. http://dx.doi.org/10.30573/ks--2022-dp10.

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This paper evaluates the evolving political will in Japan to restart nuclear power plants to generate electric power, in light of the country’s political and economic developments over the past few years. We apply a model of collective decision-making processes (CDMPs), using the KAPSARC Toolkit for Behavioral Analysis (KTAB), to simulate the interactions among different interest groups including policymakers, national and local political leaders, electricity companies, and the public, given their varying interests, goals and priorities.
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King, P. D. C. Subband Structure of a Two-Dimensional Electron Gas Formed at the Polar Surface of the Strong Spin-Orbit Perovskite KTaO3. Office of Scientific and Technical Information (OSTI), marzo 2012. http://dx.doi.org/10.2172/1035804.

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Łapińska, Justyna, Agata Sudolska, Joanna Górka, Iwona Escher, Grzegorz Kądzielawski e Paweł Brzustewicz. Zaufanie pracowników do sztucznej inteligencji w przedsiębiorstwach przemysłowych funkcjonujących w Polsce. Raport z badania. Institute of Economic Research, luglio 2020. http://dx.doi.org/10.24136/eep.rep.2020.1.

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Sztuczna inteligencja (SI) coraz częściej wpływa na życie jednostek oraz funkcjonowanie społeczeństw jako całości. W ostatnim czasie rośnie również znaczenie sztucznej inteligencji w biznesie, w którym posiada ona coraz szerszy zakres zastosowań. Definicje sztucznej inteligencji różnią się w zależności od kontekstu, w którym to pojęcie jest używane. W najprostszym ujęciu przez sztuczną inteligencję rozumie się systemy lub maszyny na nich oparte, które naśladują ludzką inteligencję podczas wykonywania określonych zadań i dodatkowo mogą się interaktywnie doskonalić (uczyć) na podstawie zbieranych informacji. Postrzegane korzyści i zagrożenia związane z wdrażaniem w przedsiębiorstwach rozwiązań z zakresu sztucznej inteligencji mogą różnić się w zależności od tego, kto dokonuje oceny zjawiska. To, co dla pracodawcy stanowi korzyść (np. obniżenie kosztów pracy), przez pracowników może być postrzegane jako realne zagrożenie związane z utratą pracy (zastąpienie pracownika przez rozwiązania oparte o sztuczną inteligencję). Ograniczenie wspomnianych obaw będzie możliwe tylko wówczas, gdy sztuczna inteligencja będzie rozwijana i wdrażana w firmach w sposób właściwy, pozwalający zdobyć zaufanie pracowników. Zaufanie ukierunkowane na technologię jawi się jako niezwykle ważna i interesująca poznawczo kategoria. Zaufanie do technologii przejawia się w gotowości człowieka do bycia pod wpływem technologii, wynikającej z użyteczności tej technologii, przewidywalności skutków jej działania a także wiarygodności jej dostawców. Pojęcie zaufania do technologii odnosi się zatem do wiary, iż druga strona relacji – w tym przypadku technologia – będzie działać w sposób przewidywalny i niezawodny, zapewniający pozytywne rezultaty. Nie bez znaczenia jest tu również indywidualna skłonność jednostki do korzystania z technologii, będąca efektem jej cech osobowościowych, związanych m.in. z wcześniejszymi doświadczeniami, otwarciem na nowe doświadczania, chęcią ciągłego poznawania i uczenia się. Identyfikacja oraz pomiar zaufania do sztucznej inteligencji, rozumianej jako najbardziej zaawansowanej formy rozwoju technologii, jest swoistym wyzwaniem z uwagi na latentną naturę rozważanej zmiennej. Biorąc pod uwagę, że zaufanie pracowników do sztucznej inteligencji w przedsiębiorstwie jest konstruktem złożonym, wielowymiarowym i nieidentyfikowalnym bezpośrednio w zrealizowanym badaniu podjęto próbę jego opisu poprzez inne konstrukty badawcze złożone z elementów (zmiennych) identyfikowalnych, które odnoszą się do obserwowalnych cech. Konstrukty badawcze niższego szczebla to: ogólne zaufanie technologiczne, zaufanie do zaawansowanej technologii w przedsiębiorstwie, zaufanie wewnątrzorganizacyjne, indywidualne zaufanie kompetencyjne. Celem przeprowadzonego badania była ocena poziomu zaufania do sztucznej inteligencji pracowników przedsiębiorstw przemysłowych funkcjonujących w Polsce. Poziom wspomnianego zaufania zbadano w oparciu o cztery, wymienione wyżej, konstrukty badawcze niższego szczebla. Z uwagi na stosunkowo niski stopień rozpoznania w teorii i praktyce problematyki zaufania pracowników do sztucznej inteligencji, przeprowadzone badanie miało charakter eksploracyjny. Zostało zrealizowane w okresie luty–kwiecień 2020 r. w 29 przedsiębiorstwach funkcjonujących na terenie Polski. Ich dobór miał charakter celowy i wynikał z możliwości uzyskania w nich zgody na realizację pomiaru. Dobór respondentów w każdym z przedsiębiorstw miał także charakter celowy. Pomiar z udziałem wybranych w ten sposób osób zrealizowano metodą ankiety bezpośredniej. Wzięło w nim udział łącznie 792 respondentów. Opisane jednostki poddano pomiarowi w miejscu pracy. Stosownie do zaproponowanej metody zbierania danych, instrumentem pomiarowym wykorzystanym w badaniu był kwestionariusz ankietowy. Uzyskane wyniki poddano analizie w każdym z czterech zaproponowanych obszarów (konstruktów badawczych niższego rzędu), dokonano także syntetycznej oceny konstruktu złożonego, jakim jest zaufanie pracowników do sztucznej inteligencji w przedsiębiorstwie. Ocena syntetyczna wyniosła S=6,63 (w skali od 0 do 10) . Wynik ten należy interpretować z ostrożnym optymizmem, świadczy bowiem o umiarkowanie wysokim ogólnym zaufaniu pracowników do zaawansowanej technologii, w tym sztucznej inteligencji. Odwołując się do ocen cząstkowych dotyczących poszczególnych obszarów warto podkreślić, że owo zaufanie jest wspierane głównie przez indywidualne zaufanie kompetencyjne oraz zaufanie wewnątrzorganizacyjne. Te dwa komponenty zaufania są ze sobą ściśle powiązane. Wyniki badania wskazują jednocześnie na niższy poziom ocen uzyskanych w dwóch pozostałych komponentach opisywanego konstruktu, jakimi są ogólne zaufanie technologiczne oraz zaufanie do zaawansowanej technologii w przedsiębiorstwie.
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