Das MINERVA-Projekt: Datenbankselektion für Peer-to-Peer-Websuche

In diesem Artikel wird MINERVA pr?sentiert, eine prototypische Implementierung einer verteilten Suchmaschine basierend auf einer Peer-to-Peer (P2P)-Architektur. MINERVA setzt auf die in der P2P-Welt verbreitete Technik verteilter Hash-Tabellen auf und benutzt diese zum Aufbau eines verteilten Verzeichnisses. Peers in unserem Ansatz entsprechen v?llig autonomen Benutzern mit ihren lokalen Suchm"oglichkeiten, die bereit sind, ihr lokales Wissen und ihre lokalen Suchm?glichkeiten im Rahmen einer Kollaboration zur Verfügung zu stellen. Wir formalisieren unsere Systemarchitektur und beschreiben das zentrale Problem einer effizienten Suche nach vielversprechenden Peers für eine konkrete Anfrage innerhalb des Verbundes. Wir greifen dabei auf existierende Methoden zurück and passen diese an unseren Systemkontext an. Wir pr?sentieren Experimente auf realen Daten, die verschiedene dieser Ans?tze vergleichen. Diese Experimente zeigen, dass die Qualit?t der Ans?tze variiert und untermauern damit die Wichtigkeit und den Einfluss einer leistungsstarken Methode zur Auswahl guter Datenbanken. Unsere Experimente deuten an, dass eine geringe Anzahl sorgf?ltig ausgew?hlter Datenbanken typischerweise bereits einen Gro?teil aller relevanten Ergebnisse des Gesamtsystems liefert.     

Correction to: Mapping the field of research on African higher education: a review of 6483 publications from 1980 to 2019

Higher Education - A Correction to this paper has been published: https://doi.org/10.1007/s10734-021-00691-x     

Emergent literacy and reading acquisition: a longitudinal study from kindergarten to primary school

European Journal of Psychology of Education - This study explores the predictivity of an emergent literacy model on the acquisition of reading in primary school in a language with a transparent...     

Adolescents’ Friendships,Academic Achievement,and Risk Behaviors: Same-Behavior and Cross-Behavior Selection and Influence Processes

This study examined to what extent adolescents’ and their friends’ risk behaviors (i.e., delinquency and alcohol use) hinder or promote their academic achievement (grade point average [GPA]), and vice versa. Longitudinal data were used (N = 1,219 seventh- to ninth-grade adolescents; M_age = 13.69). Results showed that risk behaviors negatively affected adolescents’ GPA, whereas GPA protected against engaging in risk behaviors. Moreover, adolescents tended to select friends who have similar behaviors and friends’ behaviors became more similar over time (same-behavior selection and influence). Furthermore, although same-behavior effects seemed to dominate, evidence was found for some cross-behavior selection effects and a tendency in seventh grade for cross-behavior influence effects. Concluding, it is important to investigate the interplay between different behaviors with longitudinal social network analysis.     

Social Justice: A Case-Study Examining the Influence of Primary Headteachers in Two Manchester Schools

Presently, there are a growing number of students in the primary schools in northwest England who are living in broken communities, exacerbated by the most recent global recession. Through social justice theory, this paper examines the influence of head teachers as they look to balance administrative and pedagogical experiences in the schools. Using a qualitative methodology, including observation, in-depth interviews, and field notes this case study focused on head teachers, teachers, and parents from two primary schools in the northwest of England. Specifically, this study investigates the influence of the headteachers while identifying a social justice pedagogical epistemology and strategies being used by teachers and schools who work with students from communities typically identified as living in low socio-economic areas. Foundational to this research is the belief that headteachers, families and teachers need to make concerted, intentional efforts to engage in and acquire appropriate knowledge for building effective, communicative relationship in order to benefit student achievement. A social justice perspective therefore should provide an unequivocal commitment to acting in just ways related to concepts of fairness and equity.     

Civic rhythms in an informal,media-rich learning program

Increasingly, adult mentors in informal, media-rich settings, like libraries and museums, seek to integrate both learning and civic engagement opportunities for youth into designed programming. This article illustrates how youth open and sustain opportunities for civic engagement over the course of a six-month, youth-driven program – Metro: Building Blocks (MBB) – housed within a digital media learning lab in an urban public library. Analysis develops the concept of civic rhythms as a means to feel out the social and affective contours of civic engagement that emerge in MBB. To better understand the civic rhythms of MBB, analysis focuses specifically on three rhythmic elements: pulsation, reciprocation, and oscillation. The article concludes suggesting that future research develop principles for designing-in-time that assist researchers and mentors in attuning to the youth-driven rhythms that sustain informal, media-rich programs.