bluuebunny/crossref_metadata_2025_split huggingface dataset:
Effect of perceived ease of use of ICT on stakeholder service quality in Vocational High School in West Java
Authors: Daryanto D , Rina F , Massus S , Siswantari S 
Published: December 2019

Abstract
The use of Information and Communication Technology (ICT) for school management is very helpful in providing services to students and other stakeholders. ICT as a technology can be useful if used to improve its performance. Whereas someone will use technology to assist in completing his work if he feels that the technology is easy to use. A person’s perception of existing technology will encourage the use of this technology in its work. This study aims to examine the effect of perceptions of ease of use of ICTs on service quality in vocational high schools in West Java. The method used in this study is a causal survey. Sampling in this study used proportional random sampling technique with a total sample of 248 respondents. The research data were analysed using path analysis with the Partial Least Square (PLS) approach. The results of this study indicate that the perception of ease of use of ICT indirectly affects the quality of stakeholder services in Vocational High Schools in the West Java Region.
How influential the mathematical disposition of mathematical communication skills is? (the evaluation of middle school students)
Authors: Minarti E D , Wahyudin W 
Published: December 2019

Abstract
This study aims to examine the effect of mathematical disposition of junior high school students on mathematical communication skills. This study used a correlation method with a quantitative approach. The subjects in this study were 31 student which is the eighth grade at one of the junior high schools at Bandung. The instrument used consists of a test instrument which is a test of mathematical communication skills with the indicator is forming a mathematical model; arguments based on analysis of images and concepts; and the appearance of conceptual models, such as images, diagrams, tables and graphs and non-test instruments in the form of questionnaires about students’ mathematical dispositions. The results of the study show that the mathematical disposition of junior high school students has a positive influence on mathematical communication skills. Students’ mathematical communication skills are influenced by mathematical dispositions of 74.5% and 25.5% influenced by other factors beyond students’ mathematical dispositions. This shows that the relationship between students’ dispositions and its mathematical communication skills is strong enough. Students who have a positive disposition towards mathematical learning tend to be active and can express ideas well.
Drawing graph of quadratic functions: what affects it?
Authors: Sumartini T S , Maryati I , Noordiyana M A , Sritresna T , Basuki B 
Published: December 2019

Abstract
The quadratic function of the part of mathematics that is dynamic. This gives the meaning that drawing graphs of quadratic functions can use a variety of different ways. The purpose of this study is to find out what underlies a person in solving mathematical problems in different ways. Sampling was done by purposive sampling with two respondents who had learned quadratic function material. The study was conducted qualitatively by analyzing the way respondents in the presentation of graphs of quadratic functions. The results showed that the effectiveness of drawing graphs of quadratic functions is influenced by the ability to think creatively. This implies that it is necessary to develop creative thinking skills in the educational environment.
Linear Algebra on investment portfolio optimization model
Authors: Basuki B , Sukono S , Sofyan D , Madio S S , Puspitasari N 
Published: December 2019

Abstract
In this paper we discuss the issue of linear algebra on the investment portfolio optimization models. It was assumed that stock returns are analyzed have a certain distribution, so that the mean and variance and covariance between the separation can be determined. Return of some stock used to form a vector averaging, and the number of shares used as the basis to form a unit vector. While the variance of each stock as well as the covariance between stocks, is used to form a covariance matrix. The investment portfolio was formed consisting of several stocks, in order to maximize the expected return and minimize risk. The portfolio optimization was performed using linear algebra approach. The result is a formula used to determine the optimum composition of the portfolio weights. The resulting formula is very useful for the analysis of the investment portfolio optimization.
The comparative analysis of Hungarian assessment, matrix ones assignment and alternate mansi method in solving assignment problem
Authors: Wulan E R , Devi A R , Nuraiman D 
Published: December 2019

Abstract
This paper discusses about the comparison of the three methods in the assignment that is the Hungarian Method, Matrix Ones Assignment, and Alternate Mansi Method. The Hungarian methods determine penalties in every row and column by decrease the smallest or largest point in row and column. The Matrix Ones Assignment determine penalties, divide minimum or maximum point in every row and column. The Alternate Mansi Method find the minimum or maximum value in each row that has unique value relate with the column. The concept of this problem is applied to car manufacturing company, with balanced data. While University Port Harcourt Project, using unbalanced data. Thus, it can be concluded that the Hungarian method is the most optimal.
Modelling of the number of malarias suffers in Indonesia using Bayesian generalized linear models
Authors: Santi V M , Kurnia A , Sadik K 
Published: December 2019

Abstract
Generalized Linear Models (GLM) has been used for modelling various types of data where the distribution of response variables is an exponential family. Common examples include those for binomial and Poisson response data. The GLM regression model determines the structure of the explanatory variable or covariate information, where the link function specifically determines the relationship between the regression model and the expected value of the observation. Bayesian techniques can now be applied to complex modelling problems where they could not have been applied previously. This method is a simpler model than traditional frequentist techniques. Estimating the regression model parameters is done by using Bayesian GLM. In this paper, we study conducted modelling for the number of dengue sufferers in Indonesia using the Bayesian GLM approach with several prior distributions. There are 6 independent variables that have a significant effect on the regression model, that is population density, Gini ratio, proper sanitation access, healthy zoning, integrated control and total sanitation. Based on Akaike Information Criterion (AIC) and standard error, the Bayesian GLM estimation results for Cauchy and Normal prior distribution will converge to the same value as that obtained by GLM.
Wingeom program in geometry
Authors: Noordyana M A , Maryati I , Sumartini T S , Sofyan D , Sundayana R 
Published: December 2019

Abstract
Wingeom program is a mindtool to solve geometry problems. It is used to develop dimensional geometry frameworks. The program can help visualize geometric concepts so clearly that respondents will understand geometry concepts effortlessly. Driven by this expediency, this design base research was carried out in three stages; what to learn, how to learn, when to learn, monitor the ongoing process and evaluate what has been planned, done, and the results of the process. This research is expected to be an alternative and solution in overcoming difficulties in understanding the Geometry concepts. Five respondents were selected to participate in this study. The results of the study showed that the respondents were able to explore, observe, and perform animated images and dimensional geometry material.
On the total vertex irregularity strength of comb product of cycle and path with order 3
Authors: Ramdani R , Ramdhani M A , Delilah G G A 
Published: December 2019

Abstract
Let G = (V (G),E(G)) be a graph and k be a positive integer. A total k-labeling of G is a map f:
V (G) ∪ E(G) → {1, 2,…,k}. The vertex weight v under the labeling f is denoted by wf(v) and defined by wf(v) = f(v) + ∑ υν∈E(G)f(ν∈). A total k-labeling of G is called vertex irregular if there are no two vertices with the same weight. The total vertex irregularity strength of G, denoted by tvs(G), is the minimum k such that G has a vertex irregular total k-labeling. Let G and H be two connected graphs. Let o be a vertex of H. The comb product between G and H, denoted by G⊳o
H, is a graph obtained by taking one copy of G and |V (G)| copies of H and grafting the i-th copy of H at the vertex o to the i-th vertex of G. In this paper, we determine the total vertex irregularity strength of comb product of cycle and path with order 3.
Analysis of normality of quotient subgroups on matrices integers modulo prime
Authors: Hadi I , Kharis S A A 
Published: December 2019

Abstract
A set of matrices integers modulo prime forms a finite group. This group has trivial and nontrivial subgroups. The trivial subgroup is normal and for a non-trivial subgroup the normal properties will be investigated. Furthermore, if a nontrivial subgroup is a normal subgroup, then a quotient subgroup can be constructed. This paper discusses the characteristics of normality of quotient subgroup on matrices integers modulo prime. By study of literatures, the order of group play an important role in this quotient subgroup. We derive some characteristics of normality of quotient subgroup. The result is that the order of subgroup determine on the normality of a quotient subgroup.
Analysis of the mathematical learning materials with the characteristics of realistic mathematics education in the design research pre-service teachers’ theses in Indonesia
Authors: Sampoerno P D , Meiliasari M 
Published: December 2019

Abstract
This study focuses on analysing the theses of Mathematics Education Study Program especially the Design Research (DR) types to find out the relationship between mathematics learning materials with the characteristics of Realistic Mathematics Education (RME). DR is a research methodology aiming to develop local instructional theory. The emphasis of DR is on the process of designing and conducting instructional activities, also known as the Hypothetical Learning Trajectory. The relational analysis used in this study is error analysis. We observed and described alignment between the mathematical concepts, the instructional activity and the characteristics of RME in the DR theses. Using the relational understanding framework, we analysed 36 DR theses. The finding showed that some theses developed instructional activities which were not well-aligned with the mathematical concept taught, hence the relational understanding was not achieved. However, we also found that some theses developed instructional activities that were appropriate with the mathematical concept. In such cases, the students’ relational understanding was achieved, and their mathematics learning outcomes were increased.
The effect of weights observation to estimate the monitoring control point coordinate at sermo dam
Authors: Affriani A R , Widjajanti N , Yulaikhah Y 
Published: December 2019

Abstract
The use of weights observation was effected on the estimation of coordinates and its precision. This research aims to identify 3D coordinates and its precision using weights observation from the result of GAMIT processing and the law of error propagation in sequential adjustment method. This research uses GNSS observation data from 10 deformation monitoring control points around Sermo Dam that was measured on doy 250 in 2014 and doy 129 in 2015. Data processing was performed by GAMIT software to get a baseline length and its precision. Baseline length and its precision were used as input in the sequential adjustment method. The values of weight observation were calculated using the result of GAMIT processing and the law of error propagation. The result of this research are 3D coordinates control point and its precision. The coordinate results using weight observation from GAMIT result does not significantly different from the law of random error propagation result, whereas the precision result is different significantly. The differences of precision reached 2 centimetres.
Covariant stochastic products of quantum states
Authors: Aniello Paolo 
Published: December 2019

Abstract
A notion of stochastic product of quantum states — a binary operation on the set of density operators preserving the convex structure — is discussed. We describe, in particular, a class of group-covariant, associative stochastic products: the twirled products. Each binary operation in this class can be constructed by means of a square integrable projective representation of a locally compact group, a probability measure on this group and a fiducial density operator in the Hilbert space of the representation. By suitably extending this operation from the convex set of density operators to the full Banach space of trace class operators, one obtains a Banach algebra, which is commutative in the case where the relevant group is abelian.
Darboux transformation and soliton solution for generalized Konno-Oono equation
Authors: Bekova G , Shaikhova G , Yesmakhanova K , Myrzakulov R 
Published: December 2019

Abstract
In this paper, the generalized Konno-Oono equation is investigated. Using the Lax pair, we obtain a new Darboux transformation for the dispersionless equation. A soliton solution of the generalized Konno-Oono equation is obtained on the basis of the Darboux transformation. Corresponding graphs are also built.
Dynamical generation of flavor vacuum and Lorentz invariance
Authors: Blasone M , Jizba P , Smaldone L 
Published: December 2019

Abstract
In this paper we review dynamical generation of field mixing after chiral symmetry breaking. We also study the explicit form of Lorentz boosts transformations of flavor states in a two-flavor scalar model with field mixing. We find that Lorentz symmetry is spontaneously broken on flavor vacuum because of its dynamically generated condensate structure.
On the status of pointlike fields in integrable QFTs
Authors: Bostelmann Henning 
Published: December 2019

Abstract
In integrable models of quantum field theory, local fields are normally constructed by means of the bootstrap-formfactor program. However, the convergence of their n-point functions is unclear in this setting. An alternative approach uses fully convergent expressions for fields with weaker localization properties in spacelike wedges, and deduces existence of observables in bounded regions from there, but yields little information about their explicit form. We propose a new, hybrid construction: We aim to describe pointlike local quantum fields; but rather than exhibiting their n-point functions and verifying the Wightman axioms, we establish them as closed operators affiliated with a net of local von Neumann algebras that is known from the wedge-local approach. This is shown to work at least in the Ising model.
Discretization of Generalized Chebyshev Polynomials of (Anti)symmetric Multivariate Sine Functions
Authors: Brus Adam , Hrivnák Jiří , Motlochová Lenka 
Published: December 2019

Abstract
The multivariate antisymmetric and symmetric trigonometric functions allow to generalize the four kinds of classical Chebyshev polynomials to multivariate settings. The four classes of the bivariate polynomials, related to the symmetrized sine functions, are studied in detail. For each of these polynomials, the weighted continuous and discrete orthogonality relations are shown. The related cubature formulas for numerical integration together with further model examples and properties of selected special cases are discussed.
Worldsheet Instanton Corrections to Five-branes and Waves in Double Field Theory
Authors: Kimura Tetsuji , Sasaki Shin , Shiozawa Kenta 
Published: December 2019

Abstract
We study string winding corrections to supergravity solutions in double eld theory (DFT). We nd ve-brane and wave solutions of diverse codimensions where the winding coordinates dependence is interpreted as string worldsheet instanton corrections. In order to show this fact, we give a brief discussion on the origin of these winding corrections in gauged linear sigma models (GLSMs). We propose a GLSM that provides a string sigma model whose target spaces are a defect NS5-brane, a Kaluza-Klein vortex and an exotic 52
2-brane. They are codimension two objects and are related by T-duality. This contribution is based on the works [1, 2].
Open problems in the Kontsevich graph construction of Poisson bracket symmetries
Authors: Kiselev Arthemy V 
Published: December 2019

Abstract
Poisson brackets admit infinitesimal symmetries which are encoded using oriented graphs; this construction is due to Kontsevich (1996). We formulate several open problems about combinatorial and topological properties of the graphs involved, about integrability and analytic properties of such symmetry flows (in particular, for known classes of Poisson brackets), and about cohomological, differential geometric, and quantum aspects of the theory.
Soliton solutions of logarithmic wave equation and their application for polycrystalline metals
Authors: Kraiev M , Domina K , Kraieva V , Zloshchastiev K G 
Published: December 2019

Abstract
Wave equations with logarithmic nonlinearity are applied to Korteweg-type materials which can undergo liquid-solid or liquid-gas phase transitions. One of predictions of the theory is a periodical pattern for inhomogeneities of density, which can occur in the form of bubbles or cells. Such inhomogeneities are described by soliton and solitary wave solutions of the logarithmic wave equation in the vicinity of a liquid-solid phase transition. During the solidification process, these inhomogeneities become centers of nucleation of grains. Previous works were dealing with generic natural silicate materials in geophysics, such as magmas in volcanic conduits, where the (approximately) periodical flows and structures were observed. Here we report an experimental evidence of a large-scale periodicity in structure of grains in the structural steel S235/A570 Grade 36, copper C-Cu/C14200, stainless steel X10CrNiTi18-10/AISI 321, and aluminium-magnesium alloy 5083/5056.
Thermodynamics of AdS5 black holes: holographic QCD and Stückelberg model
Authors: Megías Eugenio 
Published: December 2019

Abstract
We explore the thermodynamics of AdS5 black holes in two models: i) an improved holographic QCD model with a simple dilaton potential, and ii) the Stückelberg model in 5D. In the former case, by applying techniques of singular perturbation theory, we obtain a resummation of the naive expansion at high temperatures, providing a good fit to the lattice data for the trace anomaly. In the latter, we find a solution of the equations of motion by considering an expansion in the conformal dimension of the current associated to the gauge field.
Scalar particle with Darwin-Cox structure in external Coulomb field
Authors: Ovsiyuk E M , Koral’kov A D , Chichurin A V , Voynova Ya A , Red’kov V M 
Published: December 2019

Abstract
Generalized Klein-Fock-Gordon equation for a scalar particle with Darwin-Cox structure, which takes into account distribution of electric charge of the particle inside a finite spherical region is studied in external Coulomb field. Corresponding radial equation has two irregular singular points, r = 0 of the rank 3, r = ∞ of the rank 2, and four regular singular points. In the case of minimal angular momentum, l = 0, the structure of singularities becomes simpler: the points r = 0, r = ∞ are both of the rank 2, and four regular points remain the same. There are constructed formally exact Frobenius type solutions of the derived equations, convergence of relevant power series, with 8-term and 7-term recurrent relations respectively, is studied. As analytical quantization rule is taken so-called transcendence conditions. It provides us with 4-th order algebraic equation with respect to energy values, which has four sets of roots. Only one set of roots, 0 < El,k < 1, depending on angular momentum l = 0, 1, 2, … and main quantum number n = 0, 1, 2, … may be interpreted as corresponding to some bound states of the particle in the Coulomb field. In the same manner, a generalized nonrelativistic Schrödinger equation for such a particle was studied, the final results are similar.
Symmetries in the projection evolution model
Authors: Aleksandra P¸edrak , Andrzej Góźdź , Marek Góźdź 
Published: December 2019

Abstract
Some introductory results concerning symmetries and conservation laws within the Projection Evolution (PEv) formalism are presented. It is shown that the PEv formalism conserves the quantum probability distributions after unitary transformations of the evolution operators represented by the orthogonal resolution of unity. Some conditions for transformations selecting the states with equal transition probabilities are found. A relation between a given symmetry represented by a Lie group and PEv conservation of the eigenvalues of the Casimir operator is derived.
Slightly generalized Maxwell system and longitudinal components of solution
Authors: Simulik Volodimir , Gordievich Igor , Zajac Taras 
Published: December 2019

Abstract
We consider slightly generalized Maxwell equations with electric and magnetic currents and charges densities of the gradient type. Among other versions of the Maxwell system these equations differ by the extended symmetry properties. Such system of equations is invariant with respect to a 256-dimensional algebra, and this algebra is not yet the maximum of possible symmetry. The longitudinal components of both vectors of electric and magnetic field strengths, together with two corresponded scalar waves, are found as the exact solution of such generalized Maxwell equations. The longitudinal wave component of the electric field strength vector itself is found as an exact solution of the standard Maxwell equations with fixed current and charge of the gradient type. This wave is corresponded to the scalar wave component, which is propagated in the same direction. The analysis of found solutions demonstrates that longitudinal components are located near the corresponded current and charge densities, which are the sources of such fields. The relationship with modern experiments is considered briefly.
Hidden symmetries of relativistic hydrogen atom
Authors: Simulik Volodimir , Gordievich Igor 
Published: December 2019

Abstract
The spin s=(1,0) Bose symmetry of the Dirac equation for the free spinor field, proved recently in our papers, is extended for the Dirac equation interacting with external Coulomb field. Relativistic hydrogen atom is modeling here by such Dirac equation. We are able to present both the fermionic and bosonic symmetries known from our papers about the case of non-interacting spinor field. New symmetry operators were found on the basis of new gamma matrix representations of the Clifford and SO(8) algebras, which were found recently in our papers. Hidden symmetries were found both in the canonical Foldy-Wouthuysen and in the covariant Dirac representations. The symmetry operators, which are simple and graceful in the Foldy-Wouthuysen representation, become non-local in the Dirac model.
Spin transport in a rippled graphene periodic chain
Authors: Smotlacha Jan , Pudlak Michal , Nazmitdinov Rashid G. 
Published: December 2019

Abstract
We discuss the solution of the scattering problem of ballistic electrons on the finite periodic chain. Each element of this chain is composed of a combination of a planar and rippled graphene elements. The analysis is carried out in the effective mass approximation when only the interaction between nearest neighbour atoms is taken into account. We find that, with the increase of number of elements, the chain becomes more transparent for electrons with spin up travelling in one direction and for electrons with spin down travelling in the opposite direction.