scholarly journals Stochastic properties of generalized finite α-mixtures

Author(s):  
Omid Shojaee ◽  
Majid Asadi ◽  
Maxim Finkelstein

Most of the real-life populations are heterogeneous and homogeneity is often just a simplifying assumption for the relevant statistical analysis. Mixtures of lifetime distributions that correspond to homogeneous subpopulations were intensively studied in the literature. Various distributional and stochastic properties of finite and continuous mixtures were discussed. In this paper, following recent publications, we develop further a mixture concept in the form of the generalized α-mixtures that include all mixture models that are widely explored in the literature. We study some main stochastic properties of the suggested mixture model, that is, aging and appropriate stochastic comparisons. Some relevant examples and counterexamples are given to illustrate our findings.

2021 ◽  
Vol 58 (3) ◽  
pp. 794-804
Author(s):  
Ebrahim Amini-Seresht ◽  
Narayanaswamy Balakrishnan

AbstractIn this paper we consider a new generalized finite mixture model formed by dependent and identically distributed (d.i.d.) components. We then establish results for the comparisons of lifetimes of two such generalized finite mixture models in two different cases: (i) when the two mixture models are formed from two random vectors $\textbf{X}$ and $\textbf{Y}$ but with the same weights, and (ii) when the two mixture models are formed with the same random vectors but with different weights. Because the lifetimes of k-out-of-n systems and coherent systems are special cases of the mixture model considered, we used the established results to compare the lifetimes of k-out-of-n systems and coherent systems with respect to the reversed hazard rate and hazard rate orderings.


EDIS ◽  
2019 ◽  
Vol 2019 (5) ◽  
pp. 14
Author(s):  
John Rutledge ◽  
Joy C. Jordan ◽  
Dale W. Pracht

 The 4-H Citizenship Project offers the opportunity to help 4-H members relate all of their 4-H projects and experiences to the world around them. The 4-H Citizenship manuals will serve as a guide for 4-H Citizenship experiences. To be truly meaningful to the real-life needs and interests of your group, the contribution of volunteer leaders is essential. Each person, neighborhood, and community has individual needs that you can help your group identify. This 14-page major revision of Unit IV covers the heritage project. Written by John Rutledge, Joy C. Jordan, and Dale Pracht and published by the UF/IFAS Extension 4-H Youth Development program. https://edis.ifas.ufl.edu/4h019


MISSION ◽  
2019 ◽  
pp. 54-57
Author(s):  
Marco Riglietta ◽  
Paolo Donadoni ◽  
Grazia Carbone ◽  
Caterina Pisoni ◽  
Franca Colombi ◽  
...  

In Italy, at the end of the 1970s, methadone hydrochloride was introduced for the treatment of opioid use disorder, in the form of a racemic mixture consisting of levomethadone and dextromethadone.In 2015 Levometadone was introduced, a new formulation marketed in Italy for the treatment of opioid use disorder in 2015.The article aims to bring the experience of an Italian Addiction Centre back to the use of this new formulation in the "real life" analyzing the efficacy, the trend of adverse events and pharmacological iterations in a context in which the treated population often uses besides the opiates, cocaine and alcohol, are burdened by a relevant physical and psychic comorbidity and frequently have a prescribed polypharmacy.


Author(s):  
Claudio Urbani ◽  
Francesca Dassie ◽  
Benedetta Zampetti ◽  
Di Certo Agostino Maria ◽  
Renato Cozzi ◽  
...  

Mousaion ◽  
2019 ◽  
Vol 37 (1) ◽  
Author(s):  
Olefhile Mosweu

Most curriculum components of archival graduate programmes consist of contextual knowledge, archival knowledge, complementary knowledge, practicum, and scholarly research. The practicum, now commonly known as experiential learning in the global hub, is now widely accepted in library and information studies (LIS) education as necessary and important. It is through experiential learning that, over and above the theoretical aspects of a profession, students are provided with the opportunity to learn by doing in a workplace environment. The University of Botswana’s Master’s in Archives and Records Management (MARM) programme has a six weeks experiential learning programme whose purpose is to expose prospective archivists and/or records managers to the real archival world in terms of practice as informed by archival theory. The main objective of the study was to determine the extent to which the University of Botswana’s experiential learning component exposes students to real-life archival work to put into practice theoretical aspects learnt in the classroom as intended by the university guidelines. This study adopted a qualitative research design and collected data through interviews from participants selected through purposive and snowball sampling strategies. Documentary review supplemented the interviews. The data collected were analysed thematically in line with research objectives. The study determined that experiential learning does indeed expose students to the real world of work. It thus helps to bridge the gap between archival theory and practice for students without archives and records management work experience. For those with prior archival experience, experiential learning does not add value. This study recommends that students with prior archives and records management experience should rather, as an alternative to experiential learning, undertake supervised research, and write a research essay in a chosen thematic area in archives and records management.


2017 ◽  
Vol 3 (2) ◽  
pp. 184
Author(s):  
Sari Herleni

This article describes about the figure of children world in a short story “Anggrek Rara” written by Ina Inong, by connecting the social structure in the text and in the real life. After analyzing the social structure in the story, it is found that the plot of this story was the progressive plot, the background was from the social fact that came from inner house and outer house, otherwise the central character were Rara and Bunda. By analyzing social structure of text, it was found that a family (home) is the serious and formal environment while outer house is free and non formal. The result of the research showed that the children short story “ Anggrek Rara” was expected to give the figure outlines of the children world.AbstrakPenelitian ini membahas tentang gambaran dunia anak dalam cerita pendek anak “Anggrek Rara” karya Ina Inong dengan menghubungkan struktur sosial teks dalam karya dan struktur sosial teks dengan realitas. Melalui analisis struktur sosial dalam karya terungkap bahwa alur cerita ini merupakan alur lurus, latar terdiri dari fakta sosial yang bersumber dari rumah dan di luar rumah, sedangkan tokoh Rara dan Bunda adalah tokoh sentral. Melalui analisis struktur sosial teks dengan realitas terungkap bahwa keluarga (rumah) merupakan lingkungan yang sifatnya serius dan formal, sedangkan di luar rumah bahkan bersifat bebas dan non formal. Hasil yang diperoleh dari analisis ini menunjukkan bahwa cerita pendek anak “Anggrek Rara” dianggap mampu memberikan garis-garis besar gambaran kehidupan dunia anak.


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