Brief Announcement: On the Correctness of Transaction Processing with External Dependency

We briefly introduce a unified model to characterize correctness levels stronger (or equal to) serializability in the presence of application invariant. We propose to classify relations among committed transactions into data-related and application semantic-related. Our model delivers a condition that can be used to verify the safety of transactional executions in the presence of application invariant

Cross-country learning from patents: an analysis of citations flows in innovation trajectories

AbstractThis study proposes a methodological approach to investigate cross-country creativity/knowledge flows by analyzing patent citation networks, taking the aircraft, aviation and cosmonautics (AAC) industry as a case study. It aims at shedding some light on the following research questions: (a) how cross-country creative/learning flows can be investigated; (b) have countries of current patent owners benefited from patent acquisitions. In fact, despite the well-established economic interest for (analyzing and forecasting) innovation trajectories, this research area is still unexplored, thus, motivating the need for such study. Over 43,000,000 patents have been analyzed whereby: (a) owners have performed cross-country patent acquisitions; (b) acquired patents (granted within 2005–2009) are cited by subsequent patents (2010–2015). Methodology and results are scalable to other industries and can be exploited by managers and policy makers to: (a) help firms forecasting innovation trajectories; (b) support governments in designing/implementing measures nurturing patented innovations in industries deemed relevant to national interest

A Comparison of Intercultural Student Communities in Online Social Networks

Abstract This work is geared to analyze informal learning processes in student conferences. In particular, it compares social network interactions occurring in conference-related Facebook pages - i. e. Taiwan-America Student Conference (TASC), Japan-America Student Conference (JASC) and Korea-America Student Conference (KASC) pages - within a period starting 30 days before and finishing 30 days after the application deadlines. This empirical study has been realized by adopting open source visualization tools and techniques freely available on the software market in order to perform Social Network Analysis (SNA) in a transparent and reproducible way. Such an analysis provides interesting information on interaction dynamics, emerging hot topics and sub-group formation of attending students

analyzing informal learning patterns in facebook communities of international conferences

Abstract This paper is geared to analyze learning interactions between members of Facebook communities. In particular, this study considers the online dynamics occurring in academic communities associated with international conferences. The data collection process covers 40 days of pre-event activities within the conference-related Facebook community, and aims at elaborating and interpreting such data in order to provide useful information on how to create an online breeding environment for such international events

HaTS: Hardware-Assisted Transaction Scheduler

In this paper we present HaTS, a Hardware-assisted Transaction Scheduler. HaTS improves performance of concurrent applications by classifying the executions of their atomic blocks (or in-memory transactions) into scheduling queues, according to their so called conflict indicators. The goal is to group those transactions that are conflicting while letting non-conflicting transactions proceed in parallel. Two core innovations characterize HaTS. First, HaTS does not assume the availability of precise information associated with incoming transactions in order to proceed with the classification. It relaxes this assumption by exploiting the inherent conflict resolution provided by Hardware Transactional Memory (HTM). Second, HaTS dynamically adjusts the number of the scheduling queues in order to capture the actual application contention level. Performance results using the STAMP benchmark suite show up to 2x improvement over state-of-the-art HTM-based scheduling techniques

Brief Announcement: Asymmetric Mutual Exclusion for RDMA

In this brief announcement, we define operation asymmetry, which captures how processes may interact with an object differently, and discuss its implications in the context of a popular network communication technology, remote direct memory access (RDMA). Then, we present a novel approach to mutual exclusion for RDMA-based distributed synchronization under operation asymmetry. Our approach avoids RDMA loopback for local processes and guarantees starvation-freedom and fairness

The History of Social Psychology in the Perspective of the Student Who did not Make the “Task of Always”

Esse artigo relata a história da psicologia social contada da perspectiva de um aluno de Graduação em Psicologia da Universidade Estadual de Londrina-PR, a partir das significações produzidas nas aulas de Psicologia Social I. Um ensaio escrito produzido pelo primeiro autor é apresentado com originalidade, ao revelar intenção humorada e literária para tratar dos aspectos teóricos e históricos envolvidos na compreensão da psicologia social e sua história. O objetivo é apresentar o modo bastante original de relatar a história da psicologia social, mantendo o formato narrativo criativo do texto em coerência com a temática abordada. Sugere-se que a expressão humorada e literária do texto pode facilitar a compreensão dos conteúdos teóricos e históricos envolvidos no contexto do ensino de psicologia social, a fim de estimular os alunos a pensarem o universo psi na presença de sua diversidade teórica e metodológica, sempre incentivando a reflexão crítica, o diálogo e inquietação.In this article, we narrate Social Psychology history from a student’s perspective, based in the meanings that were produced in Social Psychology lectures at the State University of Londrina (Brazil). Lucas Paolino, the first author of this text, wrote an essay in an original way, using humor and a literary style to discuss some theoretical and historical aspects in the understanding of Social Psychology and its history. We aim to present this original way of telling the history of social psychology, keeping the creative narrative of the text and being coherent with this theme. We suggest that humor, as well as the literary expression of this essay, can facilitate the understanding of theoretical and historical contents in the context of teaching Social Psychology, in order to stimulate the pupils to think the psychological universe with its theoretical and methodological diversity, always stimulating critical reflection, dialogue and fidgety

A história da psicologia social contada da perspectiva do aluno que não fez a "tarefa de sempre"

Esse artigo relata a história da psicologia social contada da perspectiva de um aluno de Graduação em Psicologia da Universidade Estadual de Londrina-PR, a partir das significações produzidas nas aulas de Psicologia Social I. Um ensaio escrito produzido pelo primeiro autor é apresentado com originalidade, ao revelar intenção humorada e literária para tratar dos aspectos teóricos e históricos envolvidos na compreensão da psicologia social e sua história. O objetivo é apresentar o modo bastante original de relatar a história da psicologia social, mantendo o formato narrativo criativo do texto em coerência com a temática abordada. Sugere-se que a expressão humorada e literária do texto pode facilitar a compreensão dos conteúdos teóricos e históricos envolvidos no contexto do ensino de psicologia social, a fim de estimular os alunos a pensarem o universo psi na presença de sua diversidade teórica e metodológica, sempre incentivando a reflexão crítica, o diálogo e inquietação.In this article, we narrate Social Psychology history from a student's perspective, based in the meanings that were produced in Social Psychology lectures at the State University of Londrina (Brazil). Lucas Paolino, the first author of this text, wrote an essay in an original way, using humor and a literary style to discuss some theoretical and historical aspects in the understanding of Social Psychology and its history. We aim to present this original way of telling the history of social psychology, keeping the creative narrative of the text and being coherent with this theme. We suggest that humor, as well as the literary expression of this essay, can facilitate the understanding of theoretical and historical contents in the context of teaching Social Psychology, in order to stimulate the pupils to think the psychological universe with its theoretical and methodological diversity, always stimulating critical reflection, dialogue and fidgety