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41.
The synchronization process inherent to the Bitcoin network gives rise to an infinite-server model with the unusual feature that customers interact. Among the closed-form characteristics that we derive for this model is the busy period distribution which, counterintuitively, does not depend on the arrival rate. We explain this by exploiting the equivalence between two specific service disciplines, which is also used to derive the model’s stationary distribution. Next to these closed-form results, the second major contribution concerns an asymptotic result: a fluid limit in the presence of service delays. Since fluid limits arise under scalings of the law-of-large-numbers type, they are usually deterministic, but in the setting of the model discussed in this paper the fluid limit is random (more specifically, of growth-collapse type). 相似文献
42.
J. Maria Bermúdez Bertranna Muruthi Lisa M. Zak‐Hunter Morgan A. Stinson Desiree M. Seponski Joshua L. Boe Narumi Taniguchi 《Journal of marital and family therapy》2019,45(2):309-322
When working with clients in another language, having culturally relevant and properly translated clinic materials is vital to effective clinical practice. Not having them presents a barrier for bilingual therapists and their clients. This paper reviews common translation methods and introduces a multi‐level, community‐based approach for translating clinic materials for non‐English speaking clients. Informed by decolonizing practices, this five‐tier method includes members from the target community as cultural brokers to verify the accuracy and nuances of language for their cultural group, as well as a constant comparative method to ensure methodological rigor in the process of inclusion. We present community member's feedback and recommendations, as well as discuss advantages and challenges of using this collaborative culturally responsive translation method. 相似文献
43.
Maria A. Monserud 《Marriage & Family Review》2019,55(2):99-125
Using seven waves of data from the Hispanic Established Population for the Epidemiologic Study of the Elderly (1993–2011), this study applies multiphase growth models to examine changes in limitations with activities of daily living (ADL) across widowhood experience among 385 older adults of Mexican descent. This study also investigates the implications of demographic characteristics, health, socioeconomic status, living arrangements, and social involvement. ADL limitations increased pre-widowhood, were at higher levels immediately before and especially during the transition to widowhood, and increased at a steeper rate post-widowhood. Age and partially depressive symptoms accounted for these trends in ADL limitations pre-widowhood and to a lesser extent during the transition to widowhood and post-widowhood. Older age, being female, chronic conditions, financial strain, lower educational attainment, coresidence with children and others, and less frequent church attendance were risk factors for higher levels of and greater increases in these functional limitations throughout widowhood experience. 相似文献
44.
Narissra Maria Punyanunt-Carter Jenna R. Shimkowski Malinda J. Colwell Mary S. Norman 《Journal of divorce & remarriage》2018,59(7):574-589
This study takes an exploratory, qualitative approach to examine college students’ perceptions about divorce in the media. Findings suggest that participants perceived both positive and negative representations of divorced families in the media they consume, highlighting the complex nature of navigating and communicating through a divorce. Specifically, college students reported on aspects of the ex-spousal relationship, how children are affected, and the contrast between life pre- and postdivorce. An inductive theme analysis revealed several positive and negative media representations of divorce. Largely, college students perceive media messages about divorce to be accurate portrayals and impactful representations. 相似文献
45.
Katie Palmer du Preez Maria Bellringer Janet Pearson Nicki Dowling Aino Suomi Jane Koziol-Mclain 《International Gambling Studies》2018,18(3):477-494
Elevated rates of family violence among treatment-seeking problem gamblers compared to general population estimates have been reported in Spain, Canada and Australia. This study examined the occurrence of family violence among 454 problem gambling help-seeking clients (370 gamblers, 84 affected others) recruited through 3 national gambling treatment services in New Zealand. Measures used were the Problem Gambling Severity Index, and a modified version of the HITS Scale which assessed physical, emotional, verbal and sexual abuse. Past-year family violence among gamblers in this sample was 46.8% for victimization, 41.2% for perpetration and 55.0% for any form of family violence. Among affected others the occurrence was 65.5% for victimization, 57.1% for perpetration and 71.4% for any form of violence. The most common type of violence was verbal intimate partner violence. Affected others and women gamblers reported higher rates of violence victimization and perpetration. These findings underscore the importance of screening gambling help-seeking clients for family violence, and the development of prevention and treatment programmes to address violence in this population, with particular attention to affected others and women gamblers. Future research should assess coercive control and the gendered nature of family violence among problem gambling help-seekers. 相似文献
46.
The Regulation of Infant Negative Emotions: The Role of Maternal Sensitivity and Infant‐Directed Speech Prosody 下载免费PDF全文
This study explored the role of maternal sensitivity and infant‐directed speech (IDS) prosody in infants’ expression and regulation of negative emotion. Seventy mothers and their 3‐month‐old infants were observed during the Still‐Face Paradigm (SFP). Maternal sensitivity and IDS prosody were assessed at baseline and infant negative affect in the baseline, still‐face, and reunion episodes. Results showed that prototypical IDS prosody characterized by wider fundamental frequency (F0) variability was related to decreases in infant's negative affect, but only if accompanied by maternal sensitivity. Infants of sensitive mothers who spoke with more prototypical IDS prosody showed better abilities to regulate negative affect during the SFP. When prototypical IDS prosody was accompanied by low maternal sensitivity, infants showed lower regulation of negative emotions. In conclusion, infant negative affect regulation in a dyadic setting is facilitated by an optimal combination of both more prototypical maternal IDS prosody and maternal sensitive responsiveness. Implications for the study of mother–infant interaction are discussed. 相似文献
47.
Rafaela Ganga José Pedro Silva Rui Gomes Henrique Vaz João Teixeira Lopes Sílvia Silva Luísa Cerdeira Belmiro Cabrito Dulce Magalhães Maria de Lurdes Machado‐Taylor Paulo Peixoto Tomás Patrocínio Rui Brites 《International migration (Geneva, Switzerland)》2016,54(6):43-55
In the economic and social aftermath of the 2008 crisis there has been an important and growing new wave of highly qualified Portuguese emigration comprising scientists. No or very few public policies have been designed to reverse this phenomenon, risking the consequences of brain drain. International literature argues that professional reasons are central to scientists’ decision to migrate, even after the 2008 crisis. Spending some time in a foreign country to study, research, or teach, is perceived as a common step in an individual academic trajectory and an advantage for a successful professional career in academia. It is also encouraged by European Union policies. Twelve individual portraits of Portuguese scientists living in central Europe reveal how important other factors are to the migration decision‐making process. These factors include the economic crisis, student mobility programmes, and the current Portuguese scientific system revision. 相似文献
48.
Diamantino José Figueiredo dos Santos Isabel Maria Marques Alberto Catarina Maria Valente Antunes Marques 《Child and Adolescent Social Work Journal》2016,33(6):487-497
The quality of parenting, composition and socio-economic status are family risk or protective factors on juvenile delinquency, however, there is not an instrument to help psychologists and social workers to specifically assess the adolescent offender’s family. This study set out to accomplish an additional validation study of the structured interview of family assessment risk (SIFAR), a structured professional judgment tool for the assessment of family risk and protective factors of juvenile delinquents. The statistical analyses included inter-rater reliability, convergent validity with YLS/CMI, the Partial Least Squares approach to structural equation modeling and receiving operator characteristics (ROC) analysis. A sample of 130 male adolescent delinquents detained in Portuguese forensic facilities and their parents, were paired analyzed. The YLS/CMI was used to analyze the convergent validity with SIFAR. SIFAR shows a strong correlation with the YLS/CMI family context, moderate to high values of inter-rater reliability; SIFAR factors show that they are predictive determinants of the Moderate Four risk factors. ROC analysis shows adequate accuracy power. The findings show that SIFAR it is useful as an additional assessment tool for structured risk assessment instruments since it allows understanding the vulnerabilities and strengths of the delinquent’s family. 相似文献
49.
50.
Psychological Well‐Being and Career Indecision in Emerging Adulthood: The Moderating Role of Hardiness 下载免费PDF全文
Maria Maddalena Viola Pasquale Musso Cristiano Inguglia Alida Lo Coco 《The Career development quarterly》2016,64(4):387-396
This study investigated the moderating role of hardiness in the relationship between psychological well‐being (PWB) and career indecision in 131 never‐employed Italian emerging adults. Cluster analytic methods produced high and low hardiness profiles. A structural equation modeling analysis underscored the importance of hardiness for moderating the negative association between PWB and career indecision. Specifically, findings revealed that being hardy is a crucial relevant personal resource in the presence of lower levels of PWB. The authors discuss the importance of analyzing simultaneously the role of PWB and hardiness in promoting engagement in the career decision‐making process and provide implications for setting up appropriate career counseling interventions with emerging adults. Suggestions for future research are presented, such as the use of longitudinal designs and qualitative methods. 相似文献