Temporal Stream Algebra

Data stream management systems (DSMS) so far focus on event queries and hardly consider combined queries to both data from event streams and from a database. However, applications like emergency management require combined data stream and database queries. Further requirements are the simultaneous use of multiple timestamps after different time lines and semantics, expressive temporal relations between multiple time-stamps and exible negation, grouping and aggregation which can be controlled, i. e. started and stopped, by events and are not limited to fixed-size time windows. Current DSMS hardly address these requirements. This article proposes Temporal Stream Algebra (TSA) so as to meet the afore mentioned requirements. Temporal streams are a common abstraction of data streams and data- base relations; the operators of TSA are generalizations of the usual operators of Relational Algebra. A in-depth 'analysis of temporal relations guarantees that valid TSA expressions are non-blocking, i. e. can be evaluated incrementally. In this respect TSA differs significantly from previous algebraic approaches which use specialized operators to prevent blocking expressions on a "syntactical" level

Nearly Periodic Facts in Temporal Relational Databases

Despite the huge amount of work devoted to the treatment of time within the relational context, few relevant temporal phenomena still remain to be addressed. One of them is the treatment of \u201cnearly periodic events\u201d, i.e., eventsacts that occur in intervals of time which repeat periodically (e.g., a meeting occurring twice each Monday, possibly not at regular times). Nearly periodic events are quite frequent in everyday life, and thus in many applicative contexts. Their treatment within the relational model is quite challenging, since it involves the integrated treatment of three aspects: (i) the number of repetitions, (ii) their periodicity, and (iii) temporal indeterminacy. Coping with this problem requires an in-depth extension of current temporal relational database techniques. In this paper, we introduce a new data model, and new definitions of relational algebraic operators coping with the above issues. We ascertain the properties of the new model and algebra, with emphasis on the expressiveness of our representation model, on the reducibility property, and on the correctness of the algebraic operators

Irregular Indeterminate Repeated Facts in Temporal Relational Databases

Time is pervasive of reality, and many relational database approaches have been developed to cope with it. In practical applications, facts can repeat several times, and only the overall period of time containing all the repetitions may be known (consider, e.g., On January, John attended five meetings of the Bioinformatics project). While some temporal relational databases have faced facts repeated at (known) periodic time, or single facts occurred at temporally indeterminate time, the conjunction of non-periodic repetitions and temporal indeterminacy has not been faced yet. Coping with this problem requires an in-depth extension of current techniques. In this paper, we have introduced a new data model, and new definitions of relational algebraic operators coping with the above issues. We have studied the properties of the new model and algebra (with emphasis on the reducibility property), and how it can be integrated with other models in the literature

Evolving NoSQL Databases Without Downtime

NoSQL databases like Redis, Cassandra, and MongoDB are increasingly popular because they are flexible, lightweight, and easy to work with. Applications that use these databases will evolve over time, sometimes necessitating (or preferring) a change to the format or organization of the data. The problem we address in this paper is: How can we support the evolution of high-availability applications and their NoSQL data online, without excessive delays or interruptions, even in the presence of backward-incompatible data format changes? We present KVolve, an extension to the popular Redis NoSQL database, as a solution to this problem. KVolve permits a developer to submit an upgrade specification that defines how to transform existing data to the newest version. This transformation is applied lazily as applications interact with the database, thus avoiding long pause times. We demonstrate that KVolve is expressive enough to support substantial practical updates, including format changes to RedisFS, a Redis-backed file system, while imposing essentially no overhead in general use and minimal pause times during updates.Comment: Update to writing/structur

The words of the body: psychophysiological patterns in dissociative narratives

Trauma has severe consequences on both psychological and somatic levels, even affecting the genetic expression and the cell\u2019s DNA repair ability. A key mechanism in the understanding of clinical disorders deriving from trauma is identified in dissociation, as a primitive defense against the fragmentation of the self originated by overwhelming experiences. The dysregulation of the interpersonal patterns due to the traumatic experience and its detrimental effects on the body are supported by influent neuroscientific models such as Damasio\u2019s somatic markers and Porges\u2019 polyvagal theory. On the basis of these premises, and supported by our previous empirical observations on 40 simulated clinical sessions, we will discuss the longitudinal process of a brief psychodynamic psychotherapy (16 sessions, weekly frequency) with a patient who suffered a relational trauma. The research design consists of the collection of self-report and projective tests, pre-post therapy and after each clinical session, in order to assess personality, empathy, clinical alliance and clinical progress, along with the verbatim analysis of the transcripts trough the Psychotherapy Process Q-Set and the Collaborative Interactions Scale. Furthermore, we collected simultaneous psychophysiological measures of the therapeutic dyad: skin conductance and hearth rate. Lastly, we employed a computerized analysis of non-verbal behaviors to assess synchrony in posture and gestures. These automated measures are able to highlight moments of affective concordance and discordance, allowing for a deep understanding of the mutual regulations between the patient and the therapist. Preliminary results showed that psychophysiological changes in dyadic synchrony, observed in body movements, skin conductance and hearth rate, occurred within sessions during the discussion of traumatic experiences, with levels of attunement that changed in both therapist and the patient depending on the quality of the emotional representation of the experience. These results go in the direction of understanding the relational process in trauma therapy, using an integrative language in which both clinical and neurophysiological knowledge may take advantage of each other

The Role of Spirituality and Religiosity in Persons Living With Sickle Cell Disease

Purpose: Sickle cell disease (SCD) is a serious debilitating chronic illness, affecting approximately 90,000 Americans and millions globally. Spirituality and religiosity (S/R) may ease the burden faced by persons living with SCD. The purpose of this study was to examine the role of S/R in adolescents and adults living with SCD in the research literature. Method: The electronic databases Cumulative Index to Nursing and Allied Health Literature, Health Source Nursing/Academic, ProQuest Health Module, PsycINFO, Medline, PubMed, and the American Theological Library Association were searched from January 1995 to December 2014. Findings: Of the 89 studies retrieved, 11 articles between 2001 and 2013 met the inclusion criteria and were reviewed. Four themes emerged. The themes included (a) S/R as sources of coping, (b) S/R enhance pain management, (c) S/R influence health care utilization, and (d) S/R improve quality of life. Discussion: Use of S/R may be significant in coping with SCD, managing pain, affecting hospitalizations, and affecting quality of life. This review can direct researchers exploring S/R in adolescents and adults living with SCD

Real time analytics for characterizing the computer user's state

In the last years, the amount of devices that can be connected to a network grew significantly allowing to, among other tasks, collect data about the environment or the people in it in a non-intrusive way. This generated nowadays well-known topics such as Big Data or the Internet of Things. This also opened the door to the development of novel and interesting applications. In this paper we propose a distributed system for acquiring data about the users of technological devices in a non-intrusive way. We describe how this data can be collected and transformed to produce meaningful interaction features, that reveal the state of the individuals. We analyse the requirements of such a system, namely in terms of storage and speed, and describe three prototypes currently being used in three different domains of application.- This work has been supported by COMPETE: POCI-01-0145-FEDER-007043 and FCT - Fundacao para a Ciencia e Tecnologia within the Project Scope: UID/CEC/00319/2013.info:eu-repo/semantics/publishedVersio

Resiliencia y factores asociados en mujeres supervivientes de Violencia de Género en la Pareja: una revisión sistemática.

Most research on Intimate Partner Violence against women (IPV) has tended to present women as passive victims, but in recent years, there has been an increase in studies adopting a strengths-based approach. The aim of the present study is to review the empirical literature about resilience in women survivors of IPV to (a) analyze the consensus on the definition and assessment of resilience; (b) study the correlates of resilience; and (c) reflect on the applicability of such knowledge in policies and professional practice. Following PRISMA guidelines, a systematic search was carried out in the Scopus, WoS and PsycINFO databases. The search yielded 42 articles published in English or Spanish over an unlimited timeframe. Results showed that process-oriented, trait-oriented, and outcomes-oriented definitions of resilience were all adopted in the research and that assessment methods also differed across studies. Individual, relational, and contextual factors were found as resilience correlates.There is a need for a theoretical consensus and for research on the mechanisms through which vulnerability or protective factors exert their influence on groups with specific risk conditions. Finally, governments and institutions should take actions to support women and children and to prevent future IPV.Gran parte de los estudios sobre Violencia de Género en la Pareja (VGP) presentan a las mujeres como víctimas pasivas, pero en los últimos años el número de investigaciones centradas en fortalezas está aumentando. El objetivo del presente estudio es revisar la literatura empírica sobre resiliencia en mujeres supervivientes de VGP para: (a) analizar el consenso en la definición y evaluación de resiliencia; (b) estudiar los correlatos del constructo; y (c) reflexionar sobre la aplicabilidad de este conocimiento en las políticas y la práctica profesional. Siguiendo las guías PRISMA, se realizó una revisión sistemática en las bases de datos Scopus, WoS y PsycINFO, encontrando 42 artículos publicados en inglés o español sin restricción temporal. Los resultados muestran que los estudios adoptan definiciones de resiliencia tanto orientadas al proceso como al rasgo y a los resultados, y que el método de evaluación difiere entre investigaciones. Entre los correlatos de resiliencia se encontraron factores individuales, relacionales y contextuales. Se necesita un consenso teórico y profundizar en los mecanismos por los cuales los factores de vulnerabilidad o protección afectan a grupos con riesgos específicos. Por último, los gobiernos e instituciones deberían  emprender acciones de prevención y de apoyo a las mujeres e hijos/as

Conceptualizing Digital Resilience: An Intellectual Capital Perspective

In the current era of digital transformations, numerous organizations integrate information and communication technologies (ICTs) into their core operations. However, such transformations can lead to novel risks that have to be governed in the face of disruptions. The emergence of a new risk landscape has given rise to new concepts aimed at safeguarding ICT-based operations. One of these is digital resilience (DR), a complex concept that has recently received attention from academia and regulatory bodies. However, prior work has often studied it inconsistently and offered different suggestions on how to build DR. To foster a comprehensive understanding of DR within information systems (IS), we have conducted a systematic literature review and conceptualized the problem by drawing on intellectual capital (IC) theory. We contribute to research and organizational practice by offering a novel framework with three main sub-capabilities and a comprehensive range of supporting micro-foundation, which unveils areas for future research