Aurel Vlaicu University of Arad Editing House: Journals
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Semitopological Vector Spaces and Hyperseminorms
Full text linkIn this paper, we introduce and study semitopological vector spaces. The goal is to provide an ecient basefor developing the theory of extrafunction spaces in an abstract setting of algebraic systems and topological spaces.Semitopological vector spaces are more general than conventional topological vector spaces, which proved to be veryuseful for solving many problems in functional analysis. To study semitopological vector spaces, hypermetrics andhyperpseudometrics are introduced and it is demonstrated that hyperseminorms, studied in previous works of theauthor, induce hyperpseudometrics, while hypernorms induce hypermetrics. Sucient and necessary conditions fora hyperpseudometric (hypermetric) to be induced by a hyperseminorm (hypernorm) are found. We also show thatsemitopological vector spaces are closely related to systems of hyperseminorms. Then defining boundedness andcontinuity relative to associated systems of hyperseminorms, we study relations between relative boundedness andrelative continuity for mappings of vector spaces with systems of hyperseminorms and systems of hypernorms
Properties of Stabilizing Computations
Full text linkModels play an important role in the development of computer science and information technology applications.Turing machine is one of the most popular model of computing devices and computations. This model, or more exactly,a family of models, provides means for exploration of capabilities of information technology. However, a Turingmachine stops after giving a result. In contrast to this, computers, networks and their software, such as an operatingsystem, very often work without stopping but give various results. There are dierent modes of such functioning andTuring machines do not provide adequate models for these processes. One of the closest to halting computation isstabilizing computation when the output has to stabilize in order to become the result of a computational process.Such stabilizing computations are modeled by inductive Turing machines. In comparison with Turing machines, inductiveTuring machines represent the next step in the development of computer science providing better models forcontemporary computers and computer networks. At the same time, inductive Turing machines reflect pivotal traitsof stabilizing computational processes. In this paper, we study relations between dierent modes of inductive Turingmachines functioning. In particular, it is demonstrated that acceptation by output stabilizing and acceptation by statestabilizing are linguistically equivalent
Subordination Properties of Certain Subclasses of Multivalent Functions Defined By Srivastava-Wright Operator
Full text linkSome subordination properties are investigated for functions belonging to each of the subclasses V(lambda, A, B) and W(lambda, A, B) of analytic p-valent functions involving the Srivastava-Wright operator in the open unit disk, U with suitable restrictions on the parameters lambda, A, and B. The authors also derive certain subordination results involving the Hadamard product (or convolution) of the associated functions. Relevant connections of the main results to various known results are established
On Some Nonuniform Dichotomic Behaviors of Discrete Skew-product Semiflows
Full text linkIn this paper we approach concepts of nonuniform dichotomy for the case of discrete skew-product semiflows. Dierentcharacterizations of this properties are given from the point of view of invariant and strongly invariant projector families
Mean-Variance Portfolio Selection with Inflation Hedging Strategy: a Case of a Defined Contributory Pension Scheme
Full text linkIn this paper, we consider a mean-variance portfolio selection problem with inflation hedging strategy for adefined contributory pension scheme. We establish the optimal wealth which involves a cash account and two riskyassets for the pension plan member (PPM). The ecient frontier is obtained for the three asset classes which givesthe PPM the opportunity to decide his or her own risk and wealth. It was found that inflation-linked bond is a suitableasset for hedging inflation risks in an investment portfolio
Counting Sets of Lattice Points in the Plane with a Given Diameter under the Manhattan and Chebyshev Distances
Full text linkIn this paper, we present new algorithms for counting the sets of lattice points in the plane whose diameter is a given value D, under the Manhattan (L1) and Chebyshev (L infinity) distances. We consider two versions of the problem: counting all sets within a given lattice U times V, and counting all sets that are not equivalent under translations
Common Fixed Points of Fuzzy Mappings in Quasi-Pseudo Metric and Quasi-Metric Spaces
Full text linkIn this paper, we prove common fixed point theorems for fuzzy mappings satisfying a new inequality initiated by Constantin(1991) in complete quasi-pseudo metric space and we also obtain some new common fixed point theorems for a pair of fuzzymappings on complete quasi-metric space under a generalized contractive condition. Our results generalized many recent fixedpoint theorems
TIME SPENT ON SCREENS VERSUS OUTDOOR TIME: SPORTS AND ARTISTIC ACTIVITIES IN PRESCHOOLERS: 10.24250/jpe/2/2025/DL/
No full textThe research study focused on comparing the timepreschool children spend on screens (TV, computer) versustime spent outdoors, while also exploring their involvementin sports and artistic activities from a gender perspective.A total of 130 parents of preschoolers participated bycompleting a questionnaire. Children spent the most timeoutdoors on weekends (M=4.92; SD=1.471) and weekdays(M=3.89; SD=1.295). Over half of the preschoolers (77children, 59.23%) regularly participated in sportsactivities. The most popular sports were dance (11children, 14.28%), swimming and football (10 childreneach, 12.98%), followed by gymnastics (7 children,9.09%), basketball (6 children, 7.79%), handball (5children, 6.49%), and hockey/skating (4 children, 5.18%).In terms of cultural-artistic activities, slightly fewerchildren participated (43.8%, 57 children) compared tothose who did not (56.2%, 73 children). Among thoseinvolved, most (30 children, 52.63%) took painting ordrawing classes. Other activities included learning musicalinstruments like piano, violin, or percussion, and ballet,each with 8 children (14.03%). The data revealed that boyswere more inclined towards sports, while girls preferredartistic activitie
ENHANCING SCHOOL ADAPTATION THROUGH THE PLAY–LEARNING CONNECTION: 10.24250/jpe/2/2025/RSP/RIH/
No full textBeginning formal schooling represents a criticaldevelopmental transition, requiring children to adjust tonovel academic, social, and behavioral expectations.Research increasingly demonstrates that play—particularly guided play—supports this adaptation byfostering self-regulation, executive function, motivation,and socio-emotional well-being while strengtheningfoundational literacy and numeracy. This reviewsynthesizes conceptual and empirical literature connectingplay and learning to the processes of school readiness andadaptation. After outlining theoretical frameworks thatjustify playful learning, we examine current evidence frommeta-analyses and intervention studies, highlightmechanisms linking play to adjustment, and discussimplications for educational practice and policy. Findingsconverge on the conclusion that play is not merely arecreational activity but a developmentally aligned,academically rigorous approach that can promoteequitable, positive transitions to school
BRIDGING TRAUMA AND RESILIENCE: AN EVIDENCE BASED REVIEW OF PSYCHOSOCIAL INTERVENTIONS IN IMMIGRATION DETENTION AND CUSTODY CENTERS : 10.24250/jpe/2/2025/BP/DR/
No full textImmigration detention is the source of significant psychological risk for detainees, including high levels of trauma, anxiety, depression, and post-traumatic stress disorder (PTSD). While worry increases worldwide, though, the quality and quantity of psychosocial interventions in detention centers are patchy. The present paper is an evidence-based overview of psychosocial interventions that can help migrants, asylum seekers, and refugees who are detained in immigration, closed migration centers, and custody and accommodation contexts. Based on theoretical work like Ecological Systems Theory, Cognitive-Behavioral Models of Stress and Adaptation, and Resilience Theory, the review specifies how such approaches guide mental health care plans among detainees. In synthesizing exemplary practices in psychosocial treatment, the study incorporates initial screening for mental illnesses, cognitive-behavioral therapies, trauma-informed services, techniques used to promote resilience, and culture-sensitive interventions. Evidence shows that multimodal interventions—combining individual, group, and community-based approaches—are most successful in alleviating psychological distress and facilitating adaptation among detainees. However, the implementation of such interventions is often hampered by systemic barriers, including limited access to mental health professionals, legal and policy constraints, and ethical issues of coercion and informed consent. The article also addresses ethical and policy considerations and emphasizes the need for rights-based approaches, alternatives to detention, and increasing access to mental health care. Longitudinal follow-up studies of detainees' mental health trajectories after release and comparative studies of community-based alternatives to detention and their impact on psychosocial well-being are suggested for future research. By affirming evidence-based, traumainformed, and culturally sensitive psychosocial interventions, this study can contribute to constructing humane, ethical, and efficient policies for the mental wellbeing of detained migrants.