Journal articles: 'Schéma FCT'

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Zhang, Ye, and Bernd Hofmann. "On fractional asymptotical regularization of linear ill-posed problems in hilbert spaces." Fractional Calculus and Applied Analysis 22, no. 3 (June 26, 2019): 699–721. http://dx.doi.org/10.1515/fca-2019-0039.

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Abstract In this paper, we study a fractional-order variant of the asymptotical regularization method, called Fractional Asymptotical Regularization (FAR), for solving linear ill-posed operator equations in a Hilbert space setting. We assign the method to the general linear regularization schema and prove that under certain smoothness assumptions, FAR with fractional order in the range (1, 2) yields an acceleration with respect to comparable order optimal regularization methods. Based on the one-step Adams-Moulton method, a novel iterative regularization scheme is developed for the numerical realization of FAR. Two numerical examples are given to show the accuracy and the acceleration effect of FAR.

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Garani, Georgia, and Sven Helmer. "Integrating Star and Snowflake Schemas in Data Warehouses." International Journal of Data Warehousing and Mining 8, no. 4 (October 2012): 22–40. http://dx.doi.org/10.4018/jdwm.2012100102.

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A fundamental issue encountered by the research community of data warehouses (DWs) is the modeling of data. In this paper, a new design is proposed, named the starnest schema, for the logical modeling of DWs. Using nested methodology, data semantics can be explicitly represented. Part of the design involves providing a translation mechanism from the star/snowflake schemas to a nested representation. The novel schema proposed in this paper is accomplished by converting the fact-dimension schema to a fact-nested dimension schema. The transformation of the denormalized dimension tables to nested dimension tables increases the efficiency of query execution by reducing the number of tuples accessed for query retrieval since dimensional attributes can be used directly in the Group-by clause. In order to facilitate the implementation of the proposed approach, specific algorithms are built based on the starnest schema.

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HILL, JUDY. "THE DORKING EMIGRATION SCHEME OF 1832." Family & Community History 7, no. 2 (November 2004): 115–28. http://dx.doi.org/10.1179/fch.2004.7.2.004.

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Nashed, Maged N. F., Mona Eskander, and Adel M. Sharaf Life. "A Stand Alone Robust PV-FC-Electrolyzer Utilization Scheme." International Journal of Engineering Research 4, no. 3 (March 1, 2015): 145–50. http://dx.doi.org/10.17950/ijer/v4s3/314.

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Lim, Chansook. "A New Packet-level Load-balancing Scheme for Fat-Trees." Journal of the Institute of Webcasting, Internet and Telecommunication 13, no. 2 (April 30, 2013): 53–58. http://dx.doi.org/10.7236/jiibc.2013.13.2.53.

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Markovits, Henry, and Fabien Savary. "Pragmatic Schemas and the Selection Task: To Reason or Not to Reason." Quarterly Journal of Experimental Psychology Section A 45, no. 1 (July 1992): 133–48. http://dx.doi.org/10.1080/14640749208401319.

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Cheng and Holyoak (1985) have proposed that people possess classes of linguistically based schemas that have an internal structure that is determined by pragmatic considerations. They found that when permission schemas (“If you want to do P, then you must do Q”) are used in the selection task, the success rate is much superior to what is usually observed. According to Cheng and Holyoak, this is due to the fact that the permission schema is defined by a set of production rules that give the same answers to problems of conditional inference as those of formal logic. In order to test this hypothesis specifically, 160 university students were given one of two tests. The first contained two sets of inferential reasoning tasks, one using a permission schema, the second using a relation of multiple causality. The second test employed the same two conditional relations, but in an appropriate context. The results indicated that subjects did better on the reasoning task with the schema of multiple causality when presented in context, but, as predicted, their performance was much worse on the inferential reasoning task with the permission schema, which generated a higher proportion of logically incorrect responses. These results suggest that contrary to what has been affirmed, permission schemas might not have a logical structure that is equivalent to conditional logic. A second experiment examined selection task performance using the same two relations in context. Performance on the permission schema was superior to that found with the relation of multiple causality. This confirmed previous results indicating that permission schemas do improve selection task performance, but also suggests that this effect is not related to understanding of conditional reasoning.

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Yoo, Seungsoo, Junhyeong Lee, and Sun Yong Kim. "FFT-based GNSS Signal Detection Scheme Using Convolution Neural Network." Journal of Institute of Control, Robotics and Systems 26, no. 3 (March 31, 2020): 199–206. http://dx.doi.org/10.5302/j.icros.2020.19.0228.

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Li, Changpin, and Qian Yi. "Finite difference method for two-dimensional nonlinear time-fractional subdiffusion equation." Fractional Calculus and Applied Analysis 21, no. 4 (August 28, 2018): 1046–72. http://dx.doi.org/10.1515/fca-2018-0057.

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Abstract In this article, we propose an implicit-explicit scheme combining with the fast solver in space to solve two-dimensional nonlinear time-fractional subdiffusion equation. The applications of implicit-explicit scheme and fast solver will smartly enhance the computational efficiency. Due to the non-smoothness (or low regularities) of solutions to fractional differential equations, correction terms are introduced in the proposed scheme to improve the accuracy of error. The stability and convergence of the present scheme are also investigated. Numerical examples are carried out to demonstrate the efficiency and applicability of the derived scheme for both linear and nonlinear fractional subdiffusion equations with non-smooth solutions.

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Takahashi, Akihiko, and Akira Yamazaki. "A new scheme for static hedging of European derivatives under stochastic volatility models." Journal of Futures Markets 29, no. 5 (May 2009): 397–413. http://dx.doi.org/10.1002/fut.20367.

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Moon, Sangmi, Myeonghun Chu, Hanjong Kim, Daejin Kim, and Intae Hwang. "FFT-based Channel Estimation Scheme in LTE-A Downlink System." Journal of the Institute of Electronics and Information Engineers 53, no. 3 (March 25, 2016): 11–20. http://dx.doi.org/10.5573/ieie.2016.53.3.011.

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Bellatreche, Ladjel, Kamel Boukhalfa, Pascal Richard, and Komla Yamavo Woameno. "Referential Horizontal Partitioning Selection Problem in Data Warehouses." International Journal of Data Warehousing and Mining 5, no. 4 (October 2009): 1–23. http://dx.doi.org/10.4018/jdwm.2009080701.

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Horizontal Partitioning has been largely adopted by the database community, where it took a significant part in the physical design process. Actually, it is supported by most commercial database systems (DBMS), where a native Data Definition Language for decomposing tables/materialized views using various modes is proposed. In traditional databases, horizontal partitioning has been largely studied, where several fragmentation algorithms were proposed to partition tables in isolation. In the relational data warehouse environment, horizontal partitioning consists in decomposing the whole warehouse schema into sub schemas, where each schema contains fragments of dimension and fact tables. Dimension tables are fragmented using the primary partitioning mode, whereas the fact table is divided using referential mode. In this article, the authors first focus on the evolution of horizontal partitioning in commercial DBMS motivated by decision support applications. Secondly, they give a formalization of the referential fragmentation schema selection problem in the data warehouse and they study its hardness to select an optimal solution. Due to its high complexity, they develop two algorithms: hill climbing and simulated annealing with several variants to select a near optimal partitioning schema. Finally, extensive experimental studies are conducted using the data set of APB1 benchmark to compare the quality the proposed algorithms using a mathematical cost model. Based on these experiments, some recommendations are given to advise database administrator for well using horizontal partitioning.

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Lipscomb, William H., and Todd D. Ringler. "An Incremental Remapping Transport Scheme on a Spherical Geodesic Grid." Monthly Weather Review 133, no. 8 (August 1, 2005): 2335–50. http://dx.doi.org/10.1175/mwr2983.1.

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Abstract Weather and climate models contain equations for transporting conserved quantities such as the mass of air, water, ice, and associated tracers. Ideally, the numerical schemes used to solve these equations should be conservative, spatially accurate, and monotonicity-preserving. One such scheme is incremental remapping, previously developed for transport on quadrilateral grids. Here the incremental remapping scheme is reformulated for a spherical geodesic grid whose cells are hexagons and pentagons. The scheme is tested in a shallow-water model with both uniform and varying velocity fields. Solutions for standard shallow-water test cases 1, 2, and 5 are obtained with a centered scheme, a flux-corrected transport (FCT) scheme, and the remapping scheme. The three schemes are about equally accurate for transport of the height field. For tracer transport, remapping is far superior to the centered scheme, which produces large overshoots, and is generally smoother and more accurate than FCT. Remapping has a high startup cost associated with geometry calculations but is nearly twice as fast as FCT for each added tracer. As a result, remapping is cheaper than FCT for transport of more than about seven tracers.

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Baltacı, Serdal, Avni Yıldız, and Bülent Güven. "Knowledge Types Used by Eighth Grade Gifted Students While Solving Problems." Bolema: Boletim de Educação Matemática 28, no. 50 (December 2014): 1032–55. http://dx.doi.org/10.1590/1980-4415v28n50a02.

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This study aims to determine how primary school eighth grade (14 years old) gifted students use knowledge types while solving problems. In the context, the data were collected through clinical interviews conducted with three gifted students. The students’ voice recordings during problem solving and the solutions they wrote on the paper formed the data of the study. We found out that gifted students use more algorithmic knowledge and less schema knowledge in the problems that they had to solve. It can be said that the reduced usage of schema knowledge is likely to be a result of the fact that the gifted students produce different solutions using the field knowledge instead of remembering the schemas of similar problems they have encountered before.

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SILVA, ANDREIA, and CLÁUDIA ANTUNES. "MINING STARS WITH FP-GROWTH: A CASE STUDY ON BIBLIOGRAPHIC DATA." International Journal of Uncertainty, Fuzziness and Knowledge-Based Systems 19, supp01 (December 2011): 65–91. http://dx.doi.org/10.1142/s0218488511007350.

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Traditional data mining approaches look for patterns in a single table, while multi-relational data mining aims for identifying patterns that involve multiple tables. In recent years, the most common mining techniques have been extended to the multi-relational context, but there are few dedicated to deal with data stored following the multi-dimensional model, in particular the star schema. These schemas are composed of a central huge fact table linking a set of small dimension tables. Joining all the tables before mining may not be a feasible solution due to the usual massive number of records. This work proposes a method for mining frequent patterns on data following a star schema that does not materialize the join between the tables. As it extends the algorithm FP-Growth, it constructs an FP-Tree for each dimension and then combines them through the records in the fact table to form a super FP-Tree. This tree is then mined with FP-growth to find all frequent patterns. The paper presents a case study on bibliographic data, comparing efficiency and scalability of our algorithm against FP-Growth.

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Bohaienko, Vsevolod. "Parallel algorithms for modelling two-dimensional non-equilibrium salt transfer processes on the base of fractional derivative model." Fractional Calculus and Applied Analysis 21, no. 3 (June 26, 2018): 654–71. http://dx.doi.org/10.1515/fca-2018-0035.

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Abstract Modelling of salt transfer processes in fractal structured media has been considered on the base of fractional derivative equations with Caputo-Gerasimov derivatives with respect to space variables. Initial-boundary problem has been solved using locally one-dimensional finite difference scheme. Procedure of fractional derivative approximation has been proposed to lower computational complexity of solution process. Parallel algorithms for distributed memory systems and GPU have been considered. Analysis of using one-dimensional and red-black data partitioning schemes is presented and new parametric scheme which have better characteristics in the determined conditions has been proposed.

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Ding, Hengfei, and Changpin Li. "High-order algorithms for riesz derivative and their applications (IV)." Fractional Calculus and Applied Analysis 22, no. 6 (December 18, 2019): 1537–60. http://dx.doi.org/10.1515/fca-2019-0080.

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Abstract The main goal of this article is to establish a new 4th-order numerical differential formula to approximate Riesz derivatives which is obtained by means of a newly established generating function. Then the derived formula is used to solve the Riesz space fractional advection-dispersion equation. Meanwhile, by the energy method, it is proved that the difference scheme is unconditionally stable and convergent with order 𝓞(τ2 + h4). Finally, several numerical examples are given to show that the numerical convergence orders of the numerical differential formulas and the finite difference scheme are in line with the theoretical analysis.

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Acosta, Gabriel, Francisco M. Bersetche, and Juan Pablo Borthagaray. "Finite element approximations for fractional evolution problems." Fractional Calculus and Applied Analysis 22, no. 3 (June 26, 2019): 767–94. http://dx.doi.org/10.1515/fca-2019-0042.

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Abstract This work introduces and analyzes a finite element scheme for evolution problems involving fractional-in-time and in-space differentiation operators up to order two. The left-sided fractional-order derivative in time we consider is employed to represent memory effects, while a nonlocal differentiation operator in space accounts for long-range dispersion processes. We discuss well-posedness and obtain regularity estimates for the evolution problems under consideration. The discrete scheme we develop is based on piecewise linear elements for the space variable and a convolution quadrature for the time component. We illustrate the method’s performance with numerical experiments in one- and two-dimensional domains.

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Kim, Eun-Ji, and Myung-Hoon SunWoo. "High Speed 8-Parallel Fft/ifft Processor using Efficient Pipeline Architecture and Scheduling Scheme." Journal of Korean Institute of Communications and Information Sciences 36, no. 3C (March 31, 2011): 175–82. http://dx.doi.org/10.7840/kics.2011.36c.3.175.

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Wagner-Egger, Pascal. "Costs and benefits in Wason's selection task: The Social Conditional Model 1The author wants to thank the anonymous reviewers for their helpful comments about an earlier draft of this paper." Swiss Journal of Psychology 60, no. 3 (September 2001): 117–35. http://dx.doi.org/10.1024//1421-0185.60.3.117.

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This paper proposes a synthesis of two contrasting theories formulated to explain the content effect in Wason's selection task (1966) , namely the Pragmatic Reasoning Schema Theory ( Cheng & Holyoak, 1985 , 1989 ) and the Social Contract Theory ( Cosmides, 1989 ; Gigerenzer & Hug, 1992 ). Although the authors have attempted to refute their competitors' theory, we can postulate that pragmatic schemas and utilities (costs and benefits) are in fact additional factors that influence performance in the thematic selection task. Using tasks from both models, the four studies presented here indicate that utilities influence responses within the structure of a pragmatic schema. Studies 1-3 suggest that the more costly the consequences of cheating, and the more probable cheating is, the better the cheater-detection. Study 4 indicates an effect of the actual benefit in a social situation. A more complex model distinguishing different kinds of utilities is proposed to account for these results: the Social Conditional Model (SCM).

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Van Suu, Nguyen. "Agricultural land conversion and its effects on farmers in contemporary Vietnam." Focaal 2009, no. 54 (June 1, 2009): 106–13. http://dx.doi.org/10.3167/fcl.2009.540109.

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Đô'i Mó'i, the name given to the economic reforms initiated in 1986 in Vietnam, has renewed the party-state's ambitious scheme of industrialization and has intensified the process of urbanization in Vietnam. A large area of land has been converted for these purposes, with various effects on both the state and society. This article sheds light on how land conversion has resulted in farmers' resistance and in what way and to what extent it has transformed their livelihoods in the transitional context of contemporary Vietnam. The article argues that agricultural land use rights remain an important asset for Vietnamese farmers, containing great value and meaning for them besides forming a means of prod

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Давыдов, С. Ю. "О декорировании зигзагообразной кромки эпитаксиального графена." Физика твердого тела 61, no. 1 (2019): 186. http://dx.doi.org/10.21883/ftt.2019.01.46912.171.

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AbstractTwo approaches are proposed to the problem of the coupling of adsorbed particles with atoms of a zigzag edge of graphene formed on a metal substrate. The first approach is based on the Kalkstein and Soven scheme, which makes it possible to determine the electronic structure of a semi-infinite graphene sheet. The second approach is based on a cluster model of a zigzag edge. Analytical expressions are obtained for the local densities of the system’s states and the occupation numbers of a carbon adatom and an adparticle. The case of an isolated adparticle is considered in detail, and a method of taking into account the dipole–dipole interaction of particles aligned along the edge is proposed.

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Basting, Melanie, and Dmitri Kuzmin. "An FCT finite element scheme for ideal MHD equations in 1D and 2D." Journal of Computational Physics 338 (June 2017): 585–605. http://dx.doi.org/10.1016/j.jcp.2017.02.051.

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Schiffauer, Leonie. "Dangerous speculation." Focaal 2018, no. 81 (June 1, 2018): 58–71. http://dx.doi.org/10.3167/fcl.2018.810105.

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The people of Aga, a small district in southeastern Siberia, have in recent years become managers, missionaries, and victims of a wave of pyramid and Ponzi schemes. The schemes come with the promise to make people rich. In reality, they benefit only a small minority of investors while increasing financial difficulties for the majority of participants and causing severe social conflict. This article deals with the local manifestation of these economic forms. Based on the ethnographic investigation of a pyramid scheme, I discuss techniques of make-believe in order to show how ordinary people become involved in a financial hoax. My discussion provides insights into the ways in which speculative thinking shapes imaginative horizons, pervades social logics, and impacts economic realities in a post-Soviet environment.

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Cumming, W. J. K. "The Neurobiology of the Body Schema." British Journal of Psychiatry 153, S2 (1988): 7–11. http://dx.doi.org/10.1192/s0007125000298905.

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The history of a concept of a body schema is linked with the fact that the discovery that there is such a thing as a permanent, albeit vague perception that one has of one's own body, has been mainly in observations of its pathological manifestation in the clinic.

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Лебедев, B. T., H. П. Евлампиева, M. B. Бермешев, and A. A. Сжогина. "Структура пленок кремнийзамещенного политрициклононена по данным малоуглового рассеяния нейтронов." Физика твердого тела 60, no. 10 (2018): 2051. http://dx.doi.org/10.21883/ftt.2018.10.46538.044.

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AbstractPolytricyclononenes are new polymers having high permeability values not only for atmospheric gases, but also gaseous hydrocarbons. Thin films (≤100 μm) used in gas-separation membrane technologies are necessary to be studied to improve the gas transport properties of these polymers. The structure of polytricyclononene films with two vicinal side substituents Si(CH_3)_3 in a monomer unit synthesized via additive polymerization scheme is studied in this work by a small-angle neutron scattering method. As a whole, the amorphous film has a local orientation order due to chain fragments with spiral conformation. The size of the ordered regions is comparable to the length of units correlations in the polymer chain (Kuhn segment) and is 8–9 nm. Free volume and type of voids (pores) formed in the polymer film due to inhomogeneous packing are also found.

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Костишин, В. Г., В. В. Коровушкин, К. В. Похолок, А. В. Труханов, И. М. Исаев, А. Ю. Миронович, and М. А. Дарвиш. "Особенности катионного распределения и магнитных свойств поликристаллических гексагональных ферритов BaFe-=SUB=-12-x-=/SUB=-Sn-=SUB=-x-=/SUB=-O-=SUB=-19-=/SUB=-." Физика твердого тела 63, no. 10 (2021): 1496. http://dx.doi.org/10.21883/ftt.2021.10.51396.126.

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The cation distribution and magnetic properties of polycrystalline ВаFe12–xSnxO19 (х = 0.0, 0.1, 0.3, 0.6, 0.9 and 1.2) ferrites have been studied for the first time by Fe57 and Sn119 Mössbauer spectroscopy. It was shown that doping of BaFe12O19 with tin is performed with limited heterovalent isomorphism according to the scheme 2Fe3+Sn4+ + Fe2+. It was found that intense heterovalent isomorphic substitutions occur in the 12k site of the BaFe12-xSnxO19 hexaferrite in the range of 0.1 < x < 0.6; less significant substitutions observed in the 4f2 and 2a sites. It was established that the heterovalent isomorphic substitution of tin for iron in BaFe12- xSnxO19 is limited by the values of x in range х = 0.6–0.9 Measurements of the magnetic parameters of the obtained samples were performed. The possibility of practical application of the synthesized ferrites is discussed.

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Winaya, I. Gede, and Ahmad Ashari. "Transformasi Skema Basis Data Relasional Menjadi Model Data Berorientasi Dokumen pada MongoDB." IJCCS (Indonesian Journal of Computing and Cybernetics Systems) 10, no. 1 (January 31, 2016): 47. http://dx.doi.org/10.22146/ijccs.11188.

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MongoDB is a database that uses document-oriented data storage models. In fact, to migrate from a relational database to NoSQL databases such as MongoDB is not an easy matter especially if the data are extremely complex. Based on the documentation that has been done by several global companies related to the use of MongoDB, it can be concluded that the process of migration from RDBMS to MongoDB require quite a long time. One process that takes quite a lot is transformation of relational database schema into a document-oriented data model on MongoDB. This research discusses the development transformation system of relational database schema to the document oriented data model in MongoDB. The process of transformation is done by utilizing the structure and relationships between tables in the scheme as the main parameters of the modeling algorithm. In the process of the modeling documents, it necessary to adjustments the specifications of MongoDB document that formed document model can be implemented in MongoDB. Document models are formed from transformation process can be a single document, embedded document, referenced document or combination of these. Document models are formed depending on the type, rules, and the value of the relationships cardinality between tables in the relational database schema.

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Асадчиков, В. Е., И. Г. Дьячкова, Д. А. Золотов, Ф. Н. Чуховский, and Л. М. Сорокин. "Об изменении реальной структуры кристаллов кремния, имплантированных ионами водорода, при их отжиге по данным трехкристальной рентгеновской дифрактометрии." Физика твердого тела 61, no. 8 (2019): 1437. http://dx.doi.org/10.21883/ftt.2019.08.47966.430.

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AbstractIn this paper, we present the results of a three-crystal X-ray diffractometry (XRD) study of the state of a disturbed layer formed in silicon crystals by implantation of hydrogen ions with energies of 100 + 200 + 300 keV and a total dose of 2 × 10^16 cm^–2 during the subsequent heat exposure in the temperature range from 200 to 1100°C. Here, X-ray studies were performed in the three-crystal XRD scheme when the sample under consideration operates as a second stationary crystal with various fixed angular detuning α from the Bragg position while the third (perfect) crystal-analyzer sweeps the angular distribution of radiation diffracted by the second crystal. Based on a comparison of the shape of diffraction and diffuse maxima for the samples under study, a qualitative conclusion about a significant transformation of radiation defects at post-implantation annealing was derived.

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Chowdhury, Uttam Kumar, and Tapas Chandra Saha. "An ab-initio Investigation: The physical properties of ScIr-=SUB=-2-=/SUB=- Superconductor -=SUP=-*-=/SUP=-." Физика твердого тела 61, no. 4 (2019): 659. http://dx.doi.org/10.21883/ftt.2019.04.47408.332.

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AbstractUsing ab initio technique the physical properties of ScIr_2 superconductor have been investigated with T _c 1.03 K with a MgCu_2-type structure. We have carried out the plane-wave pseudopotential approach within the framework of the first-principles density functional theory (DFT) implemented within the CASTEP code. The calculated structural parameters confirm a good agreement with the experimental and other theoretical results. Using the Voigt-Reuss-Hill (VRH) averaging scheme the most important elastic properties including the bulk modulus B, shear modulus G , Young’s modulus E and Poisson’s ratio ν of ScIr_2 are determined. At ambient condition, the values of Cauchy pressure and Pugh’s ratio exhibit ductile nature of ScIr_2. The electronic and optical properties of ScIr_2 were investigated for the first time. The electronic band structure reveals metallic conductivity and the major contribution comes from Ir-5 d states. In the ultraviolet region the reflectivity is high up to 50 eV as evident from the reflectivity spectrum.

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Sanchez-Ortiz, Jorge, Francisco J. Ariza-Hernandez, Martin P. Arciga-Alejandre, and Eduard A. Garcia-Murcia. "Stochastic diffusion equation with fractional Laplacian on the first quadrant." Fractional Calculus and Applied Analysis 22, no. 3 (June 26, 2019): 795–806. http://dx.doi.org/10.1515/fca-2019-0043.

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Abstract In this work, we consider an initial boundary-value problem for a stochastic evolution equation with fractional Laplacian and white noise on the first quadrant. To construct the integral representation of solutions we adapt the main ideas of the Fokas method and by using Picard scheme we prove its existence and uniqueness. Moreover, Monte Carlo methods are implemented to find numerical solutions for particular examples.

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Mabuza, Sibusiso, and Dmitri Kuzmin. "A nonlinear ALE-FCT scheme for non-equilibrium reactive solute transport in moving domains." International Journal for Numerical Methods in Fluids 76, no. 11 (September 25, 2014): 875–908. http://dx.doi.org/10.1002/fld.3961.

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Krasnoschok, Mykola, Sergei Pereverzyev, Sergii V. Siryk, and Nataliya Vasylyeva. "Determination of the fractional order in semilinear subdiffusion equations." Fractional Calculus and Applied Analysis 23, no. 3 (June 25, 2020): 694–722. http://dx.doi.org/10.1515/fca-2020-0035.

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AbstractWe analyze the inverse boundary value-problem to determine the fractional order ν of nonautonomous semilinear subdiffusion equations with memory terms from observations of their solutions during small time. We obtain an explicit formula reconstructing the order. Based on the Tikhonov regularization scheme and the quasi-optimality criterion, we construct the computational algorithm to find the order ν from noisy discrete measurements. We present several numerical tests illustrating the algorithm in action.

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Ma, Anxin. "Implicit scheme of RVE calculation for FCC polycrystals." Computational Materials Science 27, no. 4 (June 2003): 471–79. http://dx.doi.org/10.1016/s0927-0256(03)00048-x.

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Atigui, Faten, Franck Ravat, Jiefu Song, Olivier Teste, and Gilles Zurfluh. "Facilitate Effective Decision-Making by Warehousing Reduced Data." International Journal of Decision Support System Technology 7, no. 3 (July 2015): 36–64. http://dx.doi.org/10.4018/ijdsst.2015070103.

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The authors' aim is to provide a solution for multidimensional data warehouse's reduction based on analysts' needs which will specify aggregated schema applicable over a period of time as well as retain only useful data for decision support. Firstly, they describe a conceptual modeling for multidimensional data warehouse. A multidimensional data warehouse's schema is composed of a set of states. Each state is defined as a star schema composed of one fact and its related dimensions. The derivation between states is carried out through combination of reduction operators. Secondly, they present a meta-model which allows managing different states of multidimensional data warehouse. The definition of reduced and unreduced multidimensional data warehouse schema can be carried out by instantiating the meta-model. Finally, they describe their experimental assessments and discuss their results. Evaluating their solution implies executing different queries in various contexts: unreduced single fact table, unreduced relational star schema, reduced star schema and reduced snowflake schema. The authors show that queries are more efficiently calculated within a reduced star schema.

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Jacka, Jerry K. "Uneven development in the Papua New Guinea highlands." Focaal 2015, no. 73 (December 1, 2015): 57–69. http://dx.doi.org/10.3167/fcl.2015.730105.

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Over the last 20 years, Papua New Guinea has been at the center of a resource development boom as mining, petroleum, and logging companies extract the rich resources of this tropical Pacific island. As 97 percent of the country is owned by customary groups who correspondingly receive benefits from extraction, resource development has the potential to integrate local communities into the global economy in beneficial ways. Often, though, this is not the case, as small factions of landowners control the bulk of development proceeds. In this article, I examine the development of a coffee growing scheme adjacent to the world-class Porgera Gold Mine, intended to help local people who are marginal to mining benefit streams. Tragically, however, instead of engaging in coffee production, many disenfranchised young men in Porgera prefer to work in the “life market”—a term they use to describe tribal warfare in which groups not receiving benefits attack benefit-receiving groups in the attempt to extort monetary payments. Not only are individuals' lives at stake in the life market, but so too are the economic conditions—coffee and gold mining—that allow the life market's very existence.

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Guardo, Elena, and Adam Van Tuyl. "Fat Points in ℙ1× ℙ1and Their Hilbert Functions." Canadian Journal of Mathematics 56, no. 4 (August 1, 2004): 716–41. http://dx.doi.org/10.4153/cjm-2004-033-0.

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AbstractWe study the Hilbert functions of fat points in ℙ1× ℙ1. IfZ⊆ ℙ1× ℙ1is an arbitrary fat point scheme, then it can be shown that for everyiandjthe values of the Hilbert functionHZ(l,j) andHZ(i,l) eventually become constant forl≫ 0. We show how to determine these eventual values by using only the multiplicities of the points, and the relative positions of the points in ℙ1× ℙ1. This enables us to compute all but a finite number values ofHZwithout using the coordinates of points. We also characterize the ACM fat point schemes using our description of the eventual behaviour. In fact, in the case thatZ⊆ ℙ1× ℙ1is ACM, then the entire Hilbert function and its minimal free resolution depend solely on knowing the eventual values of the Hilbert function.

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Kövecses, Zoltán. "Levels of metaphor." Cognitive Linguistics 28, no. 2 (May 1, 2017): 321–47. http://dx.doi.org/10.1515/cog-2016-0052.

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AbstractWhat is the appropriate conceptual structure involved in conceptual metaphors? Various authors offer a large number of terms to discuss the issue. While domain is the most common term, many others are also used, including frame, image schema, cognitive model, idealized cognitive model, scene, schema, scenario, etc. The problem is compounded by the fact that the terms mean different things to different researchers. The main goal of the paper is to create some clarity in this terminological and theoretical confusion. I propose that conceptual metaphors simultaneously involve conceptual structures, or units, on four levels of schematicity: the level of image schemas, the level of domains, the level of frames, and the level of mental spaces. I call the resulting framework the “multi-level view of conceptual metaphor.” The multi-level view of metaphor can provide us with insights into a number of problems that have been raised and debated in the CMT literature. I show that the study of metaphor within such a framework can legitimately be pursued on the four levels of schematicity and that no level can be singled out as the only appropriate level of analysis.

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Зацепин, А. Ф., А. Н. Киряков, Д. Р. Байтимиров, Т. В. Дьячкова, А. П. Тютюнник, and Ю. Г. Зайнулин. "Парамагнитные антисайт Mn-дефекты в нанокерамике алюмомагниевой шпинели." Физика твердого тела 62, no. 1 (2020): 94. http://dx.doi.org/10.21883/ftt.2020.01.48744.568.

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The influence of structural and dimensional factors on the formation of intrinsic and impurity paramagnetic centers in nanoceramics of aluminum-magnesium spinel is studied. The studied samples (with a grain size of 30 nm) were obtained by thermobaric synthesis. Microcrystalline ceramics and a MgAl2O4 single crystal were used as standards. The single crystal and microceramics contain characteristic Mn2+ paramagnetic centers (hyperfine structure constant (HFS) A = 82 G). In the studied nanoceramic samples in the initial state, both impurity Mn2+ and intrinsic F+ centers are detected. In contrast to nanoceramics, in reference samples centers of the F+ type appear only after irradiation with 130 keV by accelerated electrons. The parameters of the Mn2+ centers in nanoceramics differ significantly from those in microceramics and single crystals. For the Mn2+ center in nanoceramics, the EPR signal is characterized by two anomalous HFS constants (A1 = 91.21 G, A2 = 87.83 G) caused by two varieties of octahedrally coordinated manganese ions (anti-site defects [Mn2+]Al3+). The specific features of the spectral parameters of manganese centers correlate with a decrease in the lattice parameter of MgAl2O4 in the nanostructured state. The observed effects are interpreted based on the proposed charge compensation scheme of [Mn2+]Al3+ with an aluminum anti-site defect and an F+ center.

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Giusti, Andrea, Ivano Colombaro, Roberto Garra, Roberto Garrappa, Federico Polito, Marina Popolizio, and Francesco Mainardi. "A practical guide to Prabhakar fractional calculus." Fractional Calculus and Applied Analysis 23, no. 1 (February 25, 2020): 9–54. http://dx.doi.org/10.1515/fca-2020-0002.

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AbstractThe Mittag–Leffler function is universally acclaimed as the Queen function of fractional calculus. The aim of this work is to survey the key results and applications emerging from the three-parameter generalization of this function, known as the Prabhakar function. Specifically, after reviewing key historical events that led to the discovery and modern development of this peculiar function, we discuss how the latter allows one to introduce an enhanced scheme for fractional calculus. Then, we summarize the progress in the application of this new general framework to physics and renewal processes. We also provide a collection of results on the numerical evaluation of the Prabhakar function.

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M Kirmani, Mudasir. "Dimensional Modeling Using Star Schema for Data Warehouse Creation." Oriental journal of computer science and technology 10, no. 04 (October 13, 2017): 745–54. http://dx.doi.org/10.13005/ojcst/10.04.07.

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Data Warehouse design requires a radical rebuilding of tremendous measures of information, frequently of questionable or conflicting quality, drawn from various heterogeneous sources. Data Warehouse configuration assimilates business learning and innovation know-how. The outline of theData Warehouse requires a profound comprehension of the business forms in detail. The principle point of this exploration paper is to contemplate and investigate the transformation model to change over the E-R outlines to Star Schema for developing Data Warehouses. The Dimensional modelling is a logical design technique used for data warehouses. This research paper addresses various potential differences between the two techniques and highlights the advantages of using dimensional modelling along with disadvantages as well. Dimensional Modelling is one of the popular techniques for databases that are designed keeping in mind the queries from end-user in a data warehouse. In this paper the focus has been on Star Schema, which basically comprises of Fact table and Dimension tables. Each fact table further comprises of foreign keys of various dimensions and measures and degenerate dimensions if any. We also discuss the possibilities of deployment and acceptance of Conversion Model (CM) to provide the details of fact table and dimension tables according to the local needs. It will also highlight to why dimensional modelling is preferred over E-R modelling when creating data warehouse.

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Zolfaghary, Azizi, Mohammad Naghashzadegan, and Vahid Shokri. "The impact of the order of numerical schemes on slug flows modeling." Thermal Science 23, no. 6 Part B (2019): 3855–64. http://dx.doi.org/10.2298/tsci171009320z.

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This paper aims to explore the impact of the order of numerical schemes on the simulation of two-phase slug flow with a two-fluid model initiation. The governing equations of the two-fluid model have been solved by a class of Riemann solver. The numerical schemes applied in this paper involve first-order (Lax-Friedrichs and Rusanov), second-order (Ritchmyer), and high-order (flux-corrected transport or FCT and total variance diminishing or TVD). The results suggest that the TVD and FCT are able to predict the slug initiation with high accuracy compared with experimental results. Lax-Friedrichs and Rusanov are both first-order schemes and have second-order truncation error. This second-order truncation error caused numerical diffusion in the solution field and could not predict the slug initiation with high accuracy in contrast to TVD and FCT schemes. Ritchmyer is a second-order scheme and has third-order truncation error. This third-order truncation error caused dispersive results in the solution field and was not a proper scheme.

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Mochida, Isao, Takashi Oyama, and Yozo Korai. "Formation scheme of needle coke from FCC-decant oil." Carbon 26, no. 1 (1988): 49–55. http://dx.doi.org/10.1016/0008-6223(88)90008-5.

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Blackwell, Sarah E. "What’s in a pear film narrative?" Spanish in Context 6, no. 2 (September 9, 2009): 249–99. http://dx.doi.org/10.1075/sic.6.2.05bla.

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This study examines twenty pear film narratives (Chafe 1980), produced by native speakers of Castilian Spanish, following the ‘frames/schema’ model used by Tannen and Wallat (1993) in their study of a medical examination/interview. By analyzing the narratives in terms of interactive frames (originally defined by Bateson 1954) and knowledge schemas, we can see how frames and schemas interact and how participants’ expectations influence framings. Using a discourse-analytical approach, I show how various linguistic elements in the discourse convey (implicitly or explicitly) the speakers’ framings (i.e. the activities they are participating in when speaking) and their expectations about the study itself, films, elements in the pear film and their perceived roles when speaking. Segments of the discourse can convey simultaneous (merged) framings or sequential framings. The analysis shows that in order to fully account for the discourse produced during the Spanish narrators’ retelling of the pear film, we must take into consideration the participants’ underlying knowledge schemas resulting from their cultural experiences living in a rural town in Spain, the influence of and assumptions about the situation in which they find themselves and about the activity they are participating in, and the fact that the narrative discourse is co-constructed as an interactive conversational activity with interlocutors who are family members or friends of the narrators.

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Hinze, Matthias, André Schmidt, and Remco I. Leine. "Numerical solution of fractional-order ordinary differential equations using the reformulated infinite state representation." Fractional Calculus and Applied Analysis 22, no. 5 (October 25, 2019): 1321–50. http://dx.doi.org/10.1515/fca-2019-0070.

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Abstract In this paper, we propose a novel approach for the numerical solution of fractional-order ordinary differential equations. The method is based on the infinite state representation of the Caputo fractional differential operator, in which the entire history of the state of the system is considered for correct initialization. The infinite state representation contains an improper integral with respect to frequency, expressing the history dependence of the fractional derivative. The integral generally has a weakly singular kernel, which may lead to problems in numerical computations. A reformulation of the integral generates a kernel that decays to zero at both ends of the integration interval leading to better convergence properties of the related numerical scheme. We compare our method to other schemes by considering several benchmark problems.

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Kundu, B. "Performance and Optimization of Flat Plate Fins of Different Geometry on a Round Tube: A Comparative Investigation." Journal of Heat Transfer 129, no. 7 (January 13, 2007): 917–26. http://dx.doi.org/10.1115/1.2717255.

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Owing to a uniform thickness, the fin material of a flat plate fin near to the tip does not participate optimally in transferring heat. On account of this, two new fin geometries of flat plate fins are proposed for improving the heat transfer rate per unit volume. These projected fin geometries, namely flat plate fin circumscribing a circular tube by providing quarter circular cut at the corners of the tip (FQCT) and flat plate fin circumscribing a circular tube having circular arc to cut at the tip (FCAT) are suggested. The thermal performance of the said geometric fins has been determined by a semianalytical method. By using a rigorous semianalytical technique, optimization have been demonstrated in a generalized scheme either by maximizing the rate of heat duty for a given fin volume or by minimizing the fin volume for a given heat transfer duty. The optimization study has also been made with the additional length constraints imposed on one or both sides of the fluid carrying tube. Finally, it can be demonstrated from the optimization study that two proposed fins, namely FQCT and FCAT, can dissipate more rate of heat than the FCT with an identical fin volume and thermophysical parameters. It can also be highlighted that the optimum FQCT and FCAT can transfer heat at a higher rate in comparison with the annular disk fin when a space constraint exists.

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Zambella, Domenico. "Foundation versus induction in Kripke-Platek set theory." Journal of Symbolic Logic 63, no. 4 (December 1998): 1399–403. http://dx.doi.org/10.2307/2586657.

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We denote by KP_ the fragment of set-theory containing the axioms of extensionality, pairing, union and foundation as well as the schemas of ∆0-comprehension and ∆0-collection, that is: Kripke-Platek set-theory (KP) with the axiom of foundation in place of the ∈-induction schema. The theory KP is obtained by adding to KP_ the schema of ∈-inductionUsing ∈-induction it is possible to prove the existence of the transi tive closure without appealing to the axiom of infinity (see, e.g., [1]). Vice versa, when a theory proves the existence of the transitive closure, some induction is immediately ensured (by foundation and comprehension). This is not true in general: e.g., the whole of Zermelo-Fraenkel set-theory without the axiom of infinity does not prove ∈-induction (in fact, it does not prove the existence of the transitive closure; see, e.g., [3]). Open-induction is the schema of ∈-induction restricted to open formulas. We prove the following theorem.KP_ proves open-induction.We reason in a fixed but arbitrary model of KP_ whom we refer to as the model. The language is extended with a name for every set in the model. We call this constants parameters. Let φ(x) be a satisfiable open-formula possibly depending on parameters and with no free variable but x. We show that φ(x) is satisfied by an ∈-minimal set, that is, a set a such that φ(a) and (∀x ∈ a) ¬φ(x). We assume that no ordinal satisfies φ(x), otherwise the existence of a ∈-minimal set follows from foundation and comprehension.

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Klever, Julius, Andreas Brühschwein, Silvia Wagner, Sven Reese, and Andrea Meyer-Lindenberg. "Comparison of Reliability of Norberg Angle and Distraction Index as Measurements for Hip Laxity in Dogs." Veterinary and Comparative Orthopaedics and Traumatology 33, no. 04 (April 29, 2020): 274–78. http://dx.doi.org/10.1055/s-0040-1709460.

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Abstract Objective The main purpose of the study was to compare reliability of measurements for the evaluation of hip joint laxity in 59 dogs. Materials and Methods Measurement of the distraction index (DI) of the PennHIP method and the Norberg angle (NA) of the Fédération Cynologique Internationale (FCI) scoring scheme as well as scoring according to the FCI scheme and the Swiss scoring scheme were performed by three observers at different level of experience. For each dog, two radiographs were acquired with each method by the same operator to evaluate intraoperator-reliability. Results Intraoperator-reliability was slightly better for the NA compared with the DI with an intraclass correlation coefficient (ICC) of 0.962 and 0.892 respectively. The ICC showed excellent results in intraobserver-reliability and interobserver-reliability for both the NA (ICC 0.975; 0.969) and the DI (ICC 0.986; 0.972). Thus, the NA as well as the DI can be considered as reliable measurements. The FCI scheme and the Swiss scoring scheme provide similar reliability. While the FCI scheme seems to be slightly more reliable in experienced observers (Kappa FCI 0.687; Kappa Swiss 0.681), the Swiss scoring scheme had a noticeable better reliability for the unexperienced observer (Kappa FCI 0.465; Kappa Swiss 0.514). Clinical Significance The Swiss scoring scheme provides a structured guideline for the interpretation of hip radiographs and can thus be recommended to unexperienced observers.

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Aguila-Camacho, N., J. Gallegos, and M. A. Duarte-Mermoud. "Analysis of fractional order error models in adaptive systems: Mixed order cases." Fractional Calculus and Applied Analysis 22, no. 4 (August 27, 2019): 1113–32. http://dx.doi.org/10.1515/fca-2019-0058.

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Abstract This paper presents the properties of two fractional order error models (FOEM) that arise in the analysis of fractional order adaptive systems (FOAS). Cases where the fractional order is the same for every equation in these two FOEM were analyzed in a previous work, obtaining useful results. However, those cases where the fractional orders are different in the equations of FOEM (mixed order cases) have not been addressed before. This paper treats the analysis of some of these mixed order cases, proving boundedness of all the signals and convergence to zero of the mean value of the squared norm of the output error. A model reference adaptive control (MRAC) scheme for an integer order plant using fractional adaptive laws for estimating the controller parameters is presented at the end of the paper, which shows the applicability and importance of the proposed results.

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Engel, B., W. G. Buist, P. Walstra, E. Olsen, and G. Daumas. "Accuracy of prediction of percentage lean meat and authorization of carcass measurement instruments: adverse effects of incorrect sampling of carcasses in pig classification." Animal Science 76, no. 2 (April 2003): 199–209. http://dx.doi.org/10.1017/s1357729800053455.

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AbstractClassification of pig carcasses in the European Community is based on the lean meat percentage of the carcass. The lean meat percentage is predicted from instrumental carcass measurements, such as fat and muscle depth measurements, obtained in the slaughter-line. The prediction formula employed is derived from the data of a dissection experiment and has to meet requirements for authorization as put down in EC regulations. Requirements involve the sampling procedure and sample size for the dissected carcasses and the accuracy of prediction. Formulae are often derived by linear regression. In this paper we look at a particular type of sampling scheme. This involves selection of carcasses on the basis of carcass measurements not all of which are intended to be used as prediction variables. This sampling scheme frequently appears in requests for authorization of carcass measurement instruments and accompanying prediction formulae, despite the fact that it lacks formal statistical justification when used in conjunction with linear regression. The objective of this work was to assess the performance of the prediction formula that follows from this potentially faulty combination of sampling scheme and linear regression in relation to the requirements in the EC regulations. We show that this sampling scheme may produce poor predictions for lean meat percentage compared with proper sampling procedures with selection on prediction variables only or random sampling. We do so by computer simulation. Initially, simulated data were based on recent and historic data from The Netherlands. Prediction variables are fat and muscle depth measurements. The additional variable involved in sampling, but not included in the regression, was carcass weight. We also show that due to this faulty sampling scheme there is a serious risk that a new measurement instrument may not be authorized because performance criteria in the EC-regulations are not met.

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Mohammadpour Nikbin, Niloofar, Bahram Gheitarani, Mahdi Kheradmand, Shahrbanoo Ghahari, and Mohammad Ali Rahmani. "comparison maladaptive schema and self-image in fat and normal weight female adolescence." Quarterly Journal of Psychology, Educational and Social Sciences 2, no. 1 (June 10, 2018): 27–34. http://dx.doi.org/10.21859/psychol-02013.

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Journal articles on the topic 'Schéma FCT'

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