Revistas académicas de la Universidad Católica del Norte
Not a member yet
1687 research outputs found
Sort by
Existence of positive periodic solutions for delay dynamic equations
No full textIn this article we study the existence of positive periodic solutions for a dynamic equations on time scales. The main tool employed here is the Schauder's fixed point theorem. The results obtained here extend the work of Olach [12]. Two examples are also given to illustrate this work
Hyperstability of cubic functional equation in ultrametric spaces
No full textIn this paper, we present the hyperstability results of cubic functional equations in ultrametric Banach spaces
Total edge irregularity strength of disjoint union of double wheel graphs
No full textAn edge irregular total k-labeling f : V ∪ E → {1, 2, 3,...,k} of a graph G = (V, E) is a labeling of vertices and edges of G in such a way thatfor any two different edges uv and u'v' their weights f (u) + f (uv) + f (v) and f (u') + f (u'v') + f (v') are distinct. The total edge irregularity strength tes(G) is defined as the minimum k for which the graph G has an edge irregular total k-labeling. In this paper, we determine the total edge irregularity strength of disjoint union of p isomorphic double wheel graphs and disjoint union of p consecutive non-isomorphic double wheel graphs
Companions of Hermite-Hadamard Inequality for Convex Functions (II)
No full textCompanions of Hermite-Hadamard inequalities for convex functions defined on the positive axis in the case when the integral has either the weight ψ or 1 ,t > 0 are given. Applications for special means are provided as well
On (γ,δ)-Bitopological semi-closed set via topological ideal
No full textIn this paper we introduce a new class of generalized closed sets in bitopological space using local function, two extension operators and semi-open sets. We have also investigated some properties in subspace bitopology defining kernel and image
A primality test for submodules using Grobner basis
No full textIn this paper, an algorithm is presented to check if a submodule of thefreemodule R [X]s is prime, using Grobner Basis
Global neighbourhood domination
No full textA subset D of vertices of a graph G is called a global neighbourhood dominating set(gnd - set) if D is a dominating set for both G and GN, where GN is the neighbourhood graph of G. The global neighbourhood domination number(gnd - number) is the minimum cardinality of a global neighbourhood dominating set of G and is denoted by γ gn(G). In this paper sharp bounds for γ gn, are supplied for graphs whose girth is greater than three. Exact values ofthis number for paths and cycles are presented as well. The characterization result for a subset ofthe vertex set of G to be a global neighbourhood dominating set for G is given and also characterized the graphs of order n having gnd -numbers 1, 2, n — 1,n — 2, n
Some results on skolem odd difference mean labeling
No full textLet G = (V, E) be a graph with p vertices and q edges. A graph G is said to be skolem odd difference mean if there exists a function f : V(G) → {0, 1, 2, 3,...,p+3q — 3} satisfying f is 1-1 and the induced map f * : E(G) →{1, 3, 5,..., 2q-1} defined by f * (e) = [(f(u)-f(v))/2] is a bijection. A graph that admits skolem odd difference mean labeling is called skolem odd difference mean graph. We call a skolem odd difference mean labeling as skolem even vertex odd difference mean labeling if all vertex labels are even. A graph that admits skolem even vertex odd difference mean labeling is called skolem even vertex odd difference mean graph.In this paper we prove that graphs B(m,n) : Pw, (PmõSn), mPn, mPn U tPs and mK 1,n U tK1,s admit skolem odd difference mean labeling. If G(p, q) is a skolem odd differences mean graph then p≥ q. Also, we prove that wheel, umbrella, Bn and Ln are not skolem odd difference mean graph
Actitudes hacia los trastornos mentales y su asociación percibida con delito: estigma social
Get PDFINTRODUCTION: The perception of stigma towards people with mental disorders has been widely reported in the literature. OBJECTIVE: To study attitude towards mental disorders and to analyze the perceived association among several types of mental illnesses and their possible connection with robbery, sexual abuse, homicides, among others. METHOD: The questionnaires “Community Attitudes toward the Mentally Ill” (CAMI) and “Beliefs about the Relationship between Mental Illness and Crime were applied to a general population composed of 200 people whose ages ranged between 15 and 84 (X= 39.21, DT= 17.37). RESULTS: In general, women show a more positive attitude towards people with mental disorders. People with lower levels of education are more authoritative towards the mentally ill. Psychosis is highly associated with crime whereas depression and anxiety are least associated with any crime. CONCLUSION: The implications of these findings are contrasted with social stigmatization. It is suggested to approach mental disorders with a more comprehensive attitude. They represent entities linked to processes of social representation and are socially and culturally determined.INTRODUCCIÓN: La percepción sobre el estigma hacia las personas con trastornos mentales ha sido ampliamente reportada en la literatura. OBJETIVO: estudiar las actitudes hacia los trastornos mentales en población general y analizar la asociación percibida entre diversos tipos de enfermedad mental y la posible comisión de delitos contra la propiedad, agresiones de tipo sexual y homicidios, entre otros. MÉTODO: participaron 200 personas con edades comprendidas entre los 15 y los 84 años (X= 39.21, DT= 17.37), las que fueron evaluadas con los cuestionarios Community Attitudes toward the Mentally Ill, CAMI y Creencias sobre la relación entre enfermedad mental y delito. RESULTADOS: Se ha hallado que las mujeres presentan actitudes más positivas de acogida hacia las personas con trastornos mentales y las personas con un nivel de estudios más bajo muestran actitudes más autoritarias hacia este colectivo. Asimismo, se ha hallado que la enfermedad que más se percibe como asociada a la comisión de delito es el trastorno psicótico y las que menos se asociaban con cualquier delito, son la depresión y la ansiedad. CONCLUSIÓN: Se discuten las implicaciones de estos hallazgos en relación a los procesos de estigmatización social. Se aboga por la conveniencia de considerar los trastornos mentales desde una perspectiva más comprehensiva e integral dado que representan entidades ligadas a los procesos de representación social y están determinadas social y culturalmente
Apreciación diagnóstica de profesores del Trastorno de Déficit Atencional con Hiperactividad (TDAH) en escolares de enseñanza básica pertenecientes a establecimientos municipalizados de la ciudad de Arica
Get PDFOBJECTIVE: To analyze teachers’ diagnostic observation of ADHD in public primary school students in Arica. METHOD: Teachers of 409 1st to 4th year primary school students answered the ADHD-RS (ADHD-Rating Scale) as well as a rubric of diagnostic observation for each student. Additionally, medical reports of students diagnosed with ADHD were consulted. Finally, binomial contrasts between teachers’ diagnostic observations and medical diagnostic reports were performed considering national and international parameters. RESULTS: Binomial contrasts show students diagnosed with ADHD by teachers and doctors exceed national and international parameters. DISCUSSION: The practical implications of these findings are highlighted, especially for education and health. Some explanations are suggested as well as new studies and possible limitationsOBJETIVO: analizar la apreciación diagnóstica de profesores respecto al trastorno de déficit de atención con hiperactividad (TDAH) en escolares de enseñanza básica pertenecientes a establecimientos municipalizados de la ciudad de Arica. MÉTODO: En una muestra de 409 estudiantes del primer ciclo académico (de 1ero a 4to año básico), los profesores contestaron la “Escala para la evaluación del trastorno por déficit de atención con hiperactividad” (EDAH) y una pauta de apreciación diagnóstica por cada uno de sus estudiantes. Adicionalmente, se recopiló información sobre los estudiantes con diagnóstico médico de TDA o TDAH. Finalmente, se realizaron contrastes binomiales de las apreciaciones diagnóstica de los profesores y de diagnósticos médicos reportados con la prevalencia nacional e internacional. RESULTADOS: los contrastes binomiales señalaron que el número de niños apreciados o diagnosticados con TDAH por profesores y médicos superan poblacionalmente los parámetros nacionales e internacionales. DISCUSIÓN: se señala la implicancia práctica de los resultados observados, particularmente en el ámbito educacional y de la salud, se sugieren algunas explicaciones posibles, nuevos estudios y posibles limitaciones.