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RISK FACTORS OF VIOLENT BEHAVIOR AMONG ELEMENTARY AND HIGH SCHOOL STUDENTS
Ranko KOVA?EVI?,Edin MUFTI?,Meliha BIJEDI?,HarizARI
Journal of Special Education and Rehabilitation , 2012,
Abstract: The primary goal of this research was to ascertain which risk factors could serve as the most precise predictors of violent behaviour among elementary and high-school students. The research was conducted on a sample of 1209 students, between thirteen and seventeen years old, in five cantons of the Federation of Bosnia and Herzegovina. The risk factors assessment was done by means of SAVRY (Structured Assessment of Violence Risk in Youth), a tool used for gauging the levels of risk factors. With the help of the SPSS 12.0 Statistical Procedures Companion, the collected data was processed by employing regression analysis. The results indicate that the onset of violent behaviour, academic success, inability to concentrate, alcohol abuse, history of domestic violence, as well as parental separation, are the main predictors of violent behaviour among the aforementioned categoryof students. These results form a solid foundation for future planning of treatments and activities with a goal to prevent such behaviour.
The Effect of Trained Principals on the Professional (Self) Development of Employees
Hariz Agic
Management , 2012,
Abstract: The matter election of principal in schools can sometimes becomea political issue. All political parties are interested in this position,especially the ones that are now in power. The work of a principalis a rather complex activity, especially during the time of transition,when teachers, who are managed by the principals, expectthe implementation of every outlined change and to achieve thegoals of educational reform. Principals often must struggle to superviseteachers and deal with difficulties, because during theirprofessional development they did not acquire basic competencyin management, or management in education. This article discussesresearch among the main participants in education (teachers,principals, and advisors) and examines what kind of influenceeducation has on principals’ ability to provide leadership intimes of change. The results of this research show that leadershipin schools is more efficient if principals are more educated in disciplines such as management in education.
AN OVERVIEW OF QUALITY AT STATE AND PRIVATE UNIVERSITIES
Hariz Agi?,Sead Re?i?
Human : Research in Rehabilitation , 2012,
Abstract: We are witnessing the emergence of private universities “like mushrooms after rain”. It is more than clear that they are not well met by state universities. Bosnia and Herzegovina is a very fertile ground for setting this palette of problems in the educational focus of interest of the public, because there are no competent ministries of education at the state level. There is framework law on the state level but nothing exists anywhere along the vertical axis. This produced distortion of the quality and reputation of higher education. In this paper a survey among teachers and students of private and state university was conducted and has shown that there are differences in opinions of respondents in some respects regarding the quality of work. The solution would be replacing the stereotypical opinions about the differences between private and public universities and entirely rotating them toward a new, living approach to ensuring quality of education.
PROFESSIONAL ORIENTATION AND ENROLLMENT OF SECONDARY SCHOOL GRADUATES AT THE UNIVERSITY
Sead Re?i?,Hariz Agi?
Human : Research in Rehabilitation , 2013,
Abstract: Creating an environment for more efficient university education is closely related to effective planning, conducting and continuous improvement of realization of professional orientation program for students in elementary and secondary schools. The lack of personal vision of professional development for students in elementary and secondary schools, even several months before applying at university is defeating for the inputs in the process of higher education. The aim of this research was to evaluate the opinion of examinees – secondary school graduates (comprehensive schools, technical schools and those affine) – on issues regarding their intentions and decisions about continuing education, and to deter-mine how these decisions were made. The analysis of gathered data revealed that the continuing of their education is not in sufficient accordance with their choice of secondary school. The results showed that the choice of current school and professional orientation program for students in elementary and secondary schools is not in accordance with their decision-making regarding continuing education at the university.
Empirical Value at Risk for Weak Dependent Random Variables
Samir Ben Hariz,ALI KABUI
International Journal of Statistics and Probability , 2013, DOI: 10.5539/ijsp.v2n1p24
Abstract: In this work, we study the empirical estimator of the Value at Risk (VaR for short) for weak dependent observations. Our approach uses the oscillation of the empirical process under hypothesis of moment's inequality. We provide general conditions which ensure the convergence of the empirical estimator of the VaR. We also prove a central limit theorem (CLT) for the difference. We perform some simulations for different sequences to illustrate our results. Finally, we apply the results for different sequences under assumptions of mixing or covariance.
The Performance of ICDAS-II Using Low-Powered Magnification with Light-Emitting Diode Headlight and Alternating Current Impedance Spectroscopy Device for Detection of Occlusal Caries on Primary Molars
Timucin Ari,Nilgun Ari
ISRN Dentistry , 2013, DOI: 10.1155/2013/276070
Abstract: Early detection of occlusal caries in children is challenging for the dentists, because of the morphology of pit and fissures. The aim of this study was to compare in vitro the diagnostic performance of low-powered magnification with light-emitting diode headlight (LPMLED) using ICDAS-II criteria and AC Impedance Spectroscopy (ACIS) device, on occlusal surfaces of primary molars. The occlusal surfaces of 18 extracted primary molars were examined blindly by two examiners. The teeth were sectioned and examined under light microscopy using Downer’s histological criteria as gold standard. Good to excellent inter- and intraexaminer reproducibility, higher sensitivity, specificity, and AUC values were achieved by LPMLED at D1 threshold. Also the relationship between histology and LPMLED was statistically significant. In conclusion visual aids have the potential to improve the performance of early caries detection and clinical diagnostics in children. Despite its potential, ACIS device should be considered as an adjunct method in detecting caries on primary teeth. 1. Introduction It is well established that caries levels in industrialized nations have decreased over the last few decades with the greatest reductions occurring on the smooth and approximal surfaces [1–4]. Because of the complex occlusal anatomy, more sensitive and reproducible diagnostic tools for precise caries detection in children are needed [5]. Visual examination still is the most commonly used method for detecting dental caries, but various studies showed problems for sensitivity and reproducibility problems [6–8]. A standardized scoring system, International Caries Detection and Assessment System (ICDAS-II), has been developed for clinical practice and research to overcome these problems [9]. A complimentary approach to visual examination is to use visual aids such as low-powered magnification (dental loupes) and special headlights mounted on them. These visual aids became popular among dentists to improve precision of visual examination and for ergonomic reasons [10, 11]. Advances in caries research led novel technologies to help dentists in the diagnosis of early lesions. ACIS device (CarieScan PRO, Dundee, Scotland) is one of the recent examples of the novel technologies. This device relies on the application of a small alternating electrical signal (undetectable by the patient) through the tooth while monitoring the response at the sensor. By changing frequency of the applied signal, a spectrum is captured which provides valuable insights into the physical and chemical properties of
Temporal localized structures in photonic crystal fiber resonators and their spontaneous symmetry breaking instability
L. Bahloul,L. Cherbi,A. Hariz,M. Tlidi
Physics , 2014,
Abstract: We investigate analytically and numerically the formation of temporal localized structures in all photonic crystal fiber resonator. These dissipative structures consist of isolated or randomly distributed peaks in an uniform background of the intensity profile. The number of peaks and their temporal distribution are determined solely by initial conditions. They exhibit multistability behavior in a finite range of parameters. A weakly nonlinear analysis is performed in the neighborhood of the first threshold associated with the modulational instability. We consider the regime where the instability is not degenerate. We show that the fourth order dispersion affects the threshold associated with the formation of bright temporal localized structures. We estimate analytically and numerically both the linear and the nonlinear correction to the velocity of moving temporal structures induced by a spontaneous broken reflection symmetry mediated by the third-order dispersion. Finally, we show that the third order dispersion affects the threshold associated with the moving temporal localized structures.
Optimal rate of convergence for nonparametric change-point estimators for nonstationary sequences
Samir Ben Hariz,Jonathan J. Wylie,Qiang Zhang
Mathematics , 2007, DOI: 10.1214/009053606000001596
Abstract: Let $(X_i)_{i=1,...,n}$ be a possibly nonstationary sequence such that $\mathscr{L}(X_i)=P_n$ if $i\leq n\theta$ and $\mathscr{L}(X_i)=Q_n$ if $i>n\theta$, where $0<\theta <1$ is the location of the change-point to be estimated. We construct a class of estimators based on the empirical measures and a seminorm on the space of measures defined through a family of functions $\mathcal{F}$. We prove the consistency of the estimator and give rates of convergence under very general conditions. In particular, the $1/n$ rate is achieved for a wide class of processes including long-range dependent sequences and even nonstationary ones. The approach unifies, generalizes and improves on the existing results for both parametric and nonparametric change-point estimation, applied to independent, short-range dependent and as well long-range dependent sequences.
On the discrete spectrum of a spatial quantum waveguide with a disc window
S. Ben Hariz,M. Ben Salah,H. Najar
Mathematics , 2009,
Abstract: In this study we investigate the bound states of the Hamiltonian describing a quantum particle living on three dimensional straight strip of width $d$. We impose the Neumann boundary condition on a disc window of radius $a$ and Dirichlet boundary conditions on the remained part of the boundary of the strip. We prove that such system exhibits discrete eigenvalues below the essential spectrum for any $a>0$. We give also a numeric estimation of the number of discrete eigenvalue as a function of $\displaystyle \frac{a}{d}$. When $a$ tends to the infinity, the asymptotic of the eigenvalue is given.
Preterm Birth Analysis Using Nonlinear Methods (a preliminary study)
Tijana T. Ivancevic,Lakhmi C. Jain,John Pattison,Alex Hariz
Quantitative Biology , 2008,
Abstract: In this report we review modern nonlinearity methods that can be used in the preterm birth analysis. The nonlinear analysis of uterine contraction signals can provide information regarding physiological changes during the menstrual cycle and pregnancy. This information can be used both for the preterm birth prediction and the preterm labor control. Keywords: preterm birth, complex data analysis, nonlinear methods
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