Some spherical functions on hyperbolic groups

2020 ◽  
pp. 1-50
Author(s):  
Adrien Boyer

We investigate properties of some spherical functions defined on hyperbolic groups using boundary representations on the Gromov boundary endowed with the Patterson–Sullivan measure class. We prove sharp decay estimates for spherical functions as well as spectral inequalities associated with boundary representations. This point of view on the boundary allows us to view the so-called property RD (also called Haagerup’s inequality) as a particular case of a more general behavior of spherical functions on hyperbolic groups. We also prove that the family of boundary representations studied in this paper, which can be regarded as a one parameter deformation of the boundary unitary representation, are slow growth representations acting on a Hilbert space admitting a proper 1-cocycle.

Mathematics ◽  
2021 ◽  
Vol 9 (16) ◽  
pp. 1835
Author(s):  
Antonio Barrera ◽  
Patricia Román-Román ◽  
Francisco Torres-Ruiz

A joint and unified vision of stochastic diffusion models associated with the family of hyperbolastic curves is presented. The motivation behind this approach stems from the fact that all hyperbolastic curves verify a linear differential equation of the Malthusian type. By virtue of this, and by adding a multiplicative noise to said ordinary differential equation, a diffusion process may be associated with each curve whose mean function is said curve. The inference in the resulting processes is presented jointly, as well as the strategies developed to obtain the initial solutions necessary for the numerical resolution of the system of equations resulting from the application of the maximum likelihood method. The common perspective presented is especially useful for the implementation of the necessary procedures for fitting the models to real data. Some examples based on simulated data support the suitability of the development described in the present paper.


PEDIATRICS ◽  
1965 ◽  
Vol 35 (4) ◽  
pp. 589-595
Author(s):  
John Lorber

1. The family histories of 722 infants who were born with spina bifida cystica were studied. 2. The index cases were referred for surgical treatment and were not selected in any way from the genetic point of view. 3. Intensive inquiries were made to obtain a complete family pedigree, including a prospective follow-up of siblings born after the index case. 4. Of 1,256 siblings 85 or 6.8% had gross malformation of the central nervous system: spina bifida cystica in 54, anencephaly in 22, and uncomplicated hydrocephalus in 9. 5. Of 306 children born after the index case 25 (8%) or 1 in 12 were affected. 6. There was a progressive increase in multiple cases in the family with increasing family size. In sibships of five or more, multiple cases occurred in 24.1%. 7. In 118 families cases of gross malformation of the central nervous system were known to have occurred among members of the family other than siblings. Cases occurred in three generations. 8. It is possible that spina bifida cystica might be a recessively inherited condition.


Curationis ◽  
1998 ◽  
Vol 21 (1) ◽  
Author(s):  
R. Hatting ◽  
M. Poggenpoel ◽  
C.P.H. Myburgh

The street child that is driven by circumstances to live outside the supportive structure of the family, is on his own. He doesn’t have the educational developmental opportunities that children who grow up in families and societies do. He finds himself in a unique educational and living environment. From an educational psychologist’s point of view, this environment is abnormal. It is therefore a great challenge for the educational psychologist to try and avoid or resolve negative effects of the child's living environment. An exploratory-, descriptive-, contextual- and qualitative study was done, with the aim of gaining insight and understanding into the life of the street child in Hillbrow as well as his experiences of his situation. The results obtained from the interviews were placed in four categories. These categories are: The street child’s continuous struggle to survive, his need for a “normal child life” , his inability to accept responsibility and the presence of a normative awareness within the street child. In conclusion it is clear that the experiential world of the street child is multi-facetted. In general it appears that the street child has many limitations and difficulties which he experiences, and that input by an educational psychologist can have meaningful influence in his life.


1968 ◽  
Vol 13 (2) ◽  
pp. 125-133 ◽  
Author(s):  
Donald G. Langsley ◽  
Robert H. Fairbairn ◽  
Carol D. Deyoung

Like the individual, the family may be better understood from a developmental point of view. It has different tasks and problems at various stages of its existence. The family with adolescent children faces a change in composition (loss of children and the responsibility of helping these children become adults). This threat may produce a family crisis and individual members may react to the specific conflicts in a manner which depends on their previous problems. The family member who becomes a ‘patient’ may be the teenager or a parent. A family crisis therapy approach permits tension reduction within the group, improves functioning on the part of the ‘patient’ and permits the family to work out a more adaptive solution.


2018 ◽  
Vol 15 (1) ◽  
pp. 18 ◽  
Author(s):  
Yuri Andrea Arango-Bernal

Objetivo: analizar los significados que construyen las madres de personas en condición de hemofilia, sobre ser portadoras de la enfermedad. Materiales y Métodos: Estudio cualitativo con enfoque del interaccionismo simbólico que, a través de una etnografía particularista y el uso de entrevistas semiestructuradas, observaciones y revisión documental, rescató el punto de vista de 17 madres pertenecientes a la Liga Antioqueña de Hemofílicos que participaron de manera voluntaria y residen en diferentes municipios del departamento de Antioquia. Resultados: Las participantes se reconocen a sí mismas como seres potenciales, es decir, no sólo como trasmisoras o cuidadoras de la enfermedad de sus hijos, sino como sujetos cognoscentes de su realidad dispuestas a reflexionar sobre sus aprendizajes e incorporarlos a favor de la relación consigo mismas y con los demás. Los significados más relevantes son: empezar a vivir con hemofilia, asumir la enfermedad, la familia, el cuidado y la crianza, la relación con los servicios de salud, caminando con algo que no se puede desprender y darse cuenta. Conclusiones: La salud colectiva es la posibilidad de tener un acercamiento más comprensivo al proceso salud – enfermedad – atención de los colectivos humanos, tomando en cuenta las condiciones económicas, sociales y culturales en las que estos se inscriben. La pregunta por los significados de estas madres develó el tejido de lo individual y lo colectivo, como un asunto que trasciende el plano biológico de la enfermedad y da cuenta de la construcción social en la que confluyen prácticas, saberes, imaginarios y sentimientos.Palabras Clave: Cuidadores, enfermedad crónica, hemofilia A, madresSignifi cance of being a hemophilia carrierAbstractObjective: Analyzing the meanings that mothers of people with hemophilia, build about being carriers of the disease. Materials and methods: Study based on the qualitative method supported by the approach of symbolic interaction, which through a particularistic ethnography, and the use of semi-structured interviews, observations and document review, rescued the point of view of 17 mothers belonging to the Liga Antioqueña de Hemofílicos. They participated voluntarily and reside in different municipalities of Antioquia. Results: The participants recognize themselves as potential beings, that is, not only as disseminators or carers of the illness of their children, but as cognocentes subject of their reality willing to reflect on their learning and incorporate them in favor of the relationship with herself and others. The most important meanings are: start living with hemophilia, assuming the disease, the family, the care and upbringing, relationships with health services, walking with something that can not be detached and realize. Conclusions: Collective health is the ability to have a more comprehensive approach to process health - disease - care of human groups, taking into account the economic, social and cultural conditions in which they are registered. The question of the meaning of these mothers, unveiled the tissue of the individual and the collective, as a matter that transcends the biological level of the disease and accounts for the social construction that blends practices, knowledge, imaginary and feelings.Key Words: Hemophilia A, chronic disease, mothers, caregivers. Significado de ser portadora de hemofiliaResumo                                   Objetivo: Analisar os significados construídos pelas mães de pessoas com hemofilia, sobre ser portadores da doença. Materiais e Métodos: Estudo qualitativo com foco no interacionismo simbólico, que, através de uma etnografia individualista e o uso de entrevistas semi-estruturadas, observações e revisão documental, resgatou o ponto de vista de 17 mães pertencentes à Liga Antioquia de Hemófilos que participaram voluntariamente e residem em diferentes municípios do departamento de Antioquia. Resultados: Os participantes se reconhecem como seres potenciais, ou seja, não apenas como transmissores ou cuidadores da doença de seus filhos, mas como sujeitos cognitivos de sua realidade que estão dispostos a refletir sobre sua aprendizagem e a incorporá-los em favor do relacionamento com eles mesmos e com os outros. Os significados mais relevantes são: começar a viver com hemofilia, assumir a doença, família, cuidados e educação, relacionar-se com os serviços de saúde, caminhar com algo que você não pode separar e perceber. Conclusões: A saúde coletiva é a possibilidade de ter uma abordagem mais abrangente para o processo saúde-doença-cuidado de grupos humanos, levando em consideração as condições econômicas, sociais e culturais nas quais estão registradas. A questão dos significados dessas mães revela o tecido do indivíduo e o coletivo como um problema que transcende o plano biológico da doença e explica a construção social em que as práticas, o conhecimento, o imaginário e os sentimentos convergem.Palavras-Chave: Cuidadores, doenças crônicas, hemofilia A, mães  


2021 ◽  
Author(s):  
Elena Vranchan

The article deals with the peculiarities of the patriarchal noble-peasant life description in the novel “The Life of Arseniev” (1930) by Ivan Bunin, focuses on the use of characteristic Gogol’s images and techniques. Moreover, the comparison of the artistic interpretation ways of the patriarchal past by the writers reveals the Gogol's influence on the position of Bunin as the author, which is presented in the novel in different ways: from the point of view of an observer narrator who topographically accurately depicts the reality and life of the family estate, and from the point of view of an emigrant, focused on memories of the past, conveying an emotional sense of the connection between generations. In general, Bunin continues to develop the theme of the collision of immobile patriarchy with the quick movement of time that destroys the old serfdom, so his novel is imbued with nostalgia for the small-scale world going into the past. In Bunin's nostalgia, there are echoes of Gogol's sorrow about the doomed old world life.


2012 ◽  
Vol 2012 ◽  
pp. 1-19 ◽  
Author(s):  
Guido Sciavicco

The role of time in artificial intelligence is extremely important. Interval-based temporal reasoning can be seen as a generalization of the classical point-based one, and the first results in this field date back to Hamblin (1972) and Benhtem (1991) from the philosophical point of view, to Allen (1983) from the algebraic and first-order one, and to Halpern and Shoham (1991) from the modal logic one. Without purporting to provide a comprehensive survey of the field, we take the reader to a journey through the main developments in modal and first-order interval temporal reasoning over the past ten years and outline some landmark results on expressiveness and (un)decidability of the satisfiability problem for the family of modal interval logics.


2018 ◽  
Author(s):  
Guillaume Fraux ◽  
Siwar Chibani ◽  
François-Xavier Coudert

The last decade has seen an explosion of the family of framework materials and their study, both from the experimental and computational point of view. We propose here a short highlight of the current state of methodologies for modelling framework materials at multiple scales, putting together a brief review of new methods and recent endeavours in this area, as well as outlining some of the open challenges in this field. We will detail advances in atomistic simulation methods, the development of materials databases, and the growing use of machine learning for properties prediction.


2021 ◽  
Author(s):  
Mihaela Bernetič Perhavec ◽  

The article contains the description of the bases and starting points of primary physical education and sports day in Slovenia and other European countries. It presents the motivational point of view of the students at the implementation of distance learning for a sports day. There is a graphic display of the results of an online survey that was carried out among teachers and students of Komen primary school, branch of Štanjel. Fifty students from the 1st to 6th grade and 7 teachers took part in the survey. The purpose of the article is the research about what influences the motivation of students in distance learning. From the collected data it was found out that the ICT and interdisciplinary connection have played the most important role in the implementation of the sports day. The answers of the teachers show that besides the ICT devices, the weather, the family and interdisciplinary connections are the main motivators for the children. The students were very motivated at the implementation of the distance sports day. The teachers, as well as students, have found advantages and disadvantages in the organization of a distance sports day.


Author(s):  
Abdelmajid Nayif Alawneh

    The research aims to study the impact of unemployment on the social conditions in the Palestinian society from the point of view of the unemployed youth, especially in the current time period (2019), the researcher used the descriptive analytical method, and the research community consists of young people in the governorate of Ramallah. The researcher used the questionnaire tool, and the data were analyzed by the analysis program (SPSS). It was found that the majority of youth are unemployed, they are middle age, single and large families, urban residents, people with specialties and low income. As for the results of the research, there was an increase in the impact of the forms of unemployment on the social conditions of the individual, family and society and their outlook towards the future, came the highest degree on the social conditions of the individual (6. 90%) and then the social conditions of the family (3. 83%), Followed by the societal conditions to reach the value (78%), came the lowest values ​​for the outlook for the future, which amounted to (67%). Some of the features of the impact of unemployment, including the tension, anxiety and frustration of the young group. As for the nature of the relationship between the variables of the study, there was a statistically significant relationship between the combined unemployment and the low income, between the apparent, persuasive and compulsory unemployment, and the individual, family and societal situations and the outlook for them. At the end of the research a number of recommendations were made, most notably the need to balance the types of education and activate the social and cultural role of the family.  


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