Search results for "exam"
showing 10 items of 1241 documents
Dynamic Coalitional TU Games: Distributed Bargaining among Players' Neighbors
2013
We consider a sequence of transferable utility (TU) games where, at each time, the characteristic function is a random vector with realizations restricted to some set of values. The game differs from other ones in the literature on dynamic, stochastic or interval valued TU games as it combines dynamics of the game with an allocation protocol for the players that dynamically interact with each other. The protocol is an iterative and decentralized algorithm that offers a paradigmatic mathematical description of negotiation and bargaining processes. The first part of the paper contributes to the definition of a robust (coalitional) TU game and the development of a distributed bargaining protoc…
Qualitative Theory of Differential Equations, Difference Equations, and Dynamic Equations on Time Scales
2016
We are pleased to present this special issue. This volume reflects an increasing interest in the analysis of qualitative behavior of solutions to differential equations, difference equations, and dynamic equations on time scales. Numerous applications arising in the engineering and natural sciences call for the development of new efficient methods and for the modification and refinement of known techniques that should be adjusted for the analysis of new classes of problems. The twofold goal of this special issue is to reflect both the state-of-the-art theoretical research and important recent advances in the solution of applied problems.
Isometries of nilpotent metric groups
2016
We consider Lie groups equipped with arbitrary distances. We only assume that the distance is left-invariant and induces the manifold topology. For brevity, we call such object metric Lie groups. Apart from Riemannian Lie groups, distinguished examples are sub-Riemannian Lie groups and, in particular, Carnot groups equipped with Carnot-Carath\'eodory distances. We study the regularity of isometries, i.e., distance-preserving homeomorphisms. Our first result is the analyticity of such maps between metric Lie groups. The second result is that if two metric Lie groups are connected and nilpotent then every isometry between the groups is the composition of a left translation and an isomorphism.…
A reflection approach to the broken ray transform
2013
We reduce the broken ray transform on some Riemannian manifolds (with corners) to the geodesic ray transform on another manifold, which is obtained from the original one by reflection. We give examples of this idea and present injectivity results for the broken ray transform using corresponding earlier results for the geodesic ray transform. Examples of manifolds where the broken ray transform is injective include Euclidean cones and parts of the spheres $S^n$. In addition, we introduce the periodic broken ray transform and use the reflection argument to produce examples of manifolds where it is injective. We also give counterexamples to both periodic and nonperiodic cases. The broken ray t…
DEVELOPING AN INTEGRATED FRAMEWORK FOR ANALYZING WAYS OF REASONING IN MATHEMATICS
2022
Mathematics education literature involves studies that sought a way of investigating the mode of reasoning in mathematics textbooks because textbooks are the main resource for teachers in planning their mathematics lessons. In this vein, this study aimed to analyze the ways of reasoning in mathematics textbooks that are currently used in five countries: Slovakia, Czech Republic, Italy, Norway, and Turkiye, as a part of a Horizon 2020 Project. We initially started with a framework that aimed to examine the effect of teachers’ participation in the lesson study on the improvement of students’ mathematical reasoning (Project LESSAM). However, as the textbook analysis of different countries proc…
Regularity of solutions to differential equations with non-Lipschitz coefficients
2008
AbstractWe study the ordinary and stochastic differential equations whose coefficients satisfy certain non-Lipschitz conditions, namely, we study the behaviors of small subsets under the flows generated by these equations.
University Applicants’ Critical Thinking Skills: The Case of the Finnish Educational Sciences
2016
This study investigates the quality of the critical thinking skills of applicants (n = 77) seeking entry to the faculty of educational sciences in a Finnish university and how these skills are associated with the applicant’s age, previous higher education experience, and matriculation and entrance examination scores. The data consist of the applicants’ responses to problem-solving tasks and their matriculation and entrance examination scores. Critical thinking skills were measured with comparison and argumentation tasks. The results indicate that comparison of the texts and analysis of the arguments they contained were more difficult tasks than putting forward arguments both for and against…
On minima of discrimination functions
2008
Abstract A discrimination function ψ ( x , y ) assigns a measure of discriminability to stimulus pairs x , y (e.g., the probability with which they are judged to be different in a same-different judgment scheme). If for every x there is a single y least discriminable from x , then this y is called the point of subjective equality (PSE) for x , and the dependence h ( x ) of the PSE for x on x is called a PSE function. The PSE function g ( y ) is defined in a symmetrically opposite way. If the graphs of the two PSE functions coincide (i.e., g ≡ h − 1 ), the function is said to satisfy the Regular Minimality law. The minimum level functions are restrictions of ψ to the graphs of the PSE funct…
E-Exam Questions and Meaningful Learning
2016
Traditionally exams are seen as one of the important learning situations and as possibilities to verify the learning processes in universities. In academic contexts exams are used actively, and they still play an important role. From a pedagogical point of view, exams are also criticized – do exams promote high-quality learning? Current learning theories highlight the active role of the individual learner and skills for future working life. At the same time the changes in the operating environment are huge and the pace of development is high, which also challenges academic practices. Digital revolution forces and allows for learning in different contexts. Different web-based solutions are d…
Working college students’ profile Case Study: Faculty of Engineering Sibiu, Romania
2017
Abstract Faculty of Engineering in Sibiu is facing an increasing demand from industrial companies to employ students not only by the time of graduation but even during university studies. The scope of the study was to provide an insight on working students’ profile and the problems they are confronting with. Forty working students from the third year of Faculty of Engineering Sibiu were interviewed with regard of the research topic. Results of the study reflect the fact that a majority of working students face difficulties in school, having low grades or failed exams. The exam session seems to be a hard period for working students, and many of them find difficulties in attending all lecture…