Congruences on Dynamic Algebras

The lattice Cong of all dynamic congruences on a given dynamic algebra is presented. Whenever is separable with zero we define dynamic ideal on , given rise to the lattice Ide. The notions of kernel of a dynamic congruence andthe congruence generated by a dynamic ideal are introduced todescribe a Galois connection between Cong and Ide. We study conditions under which a dynamic congruence is determined byits kernel.     

To be or not to be: an exploration of ethnic identity development in context

This qualitative study focused on the intersection of personal and ethnic identities among forty African American, Puerto Rican, Dominican, and Chinese American high school students. The patterns in content indicated that for the Puerto Ricans, the intersection of their personal and social identities was a series of accommodations to a positive peer climate and a resistance to being Dominican. For the other ethnic groups, the intersection of their personal and social identities consisted of a process of resistance and accommodation to negative stereotypes projected on them by their peers and, for African Americans, themselves.     

Influence of Different Sitting Positions on Healthy Infants' Reaching Movements

The authors analyze the influence of different sitting positions (ring and flexion) on the reaching performance (spatiotemporal variables) of full-term infants 6 and 7 months old. In addition, they correlated level of trunk control, measured by the Segmental Assessment of Trunk Control, with performance during reaching. The different sitting positions only influenced the reaching movements of 6-month-old infants, who showed the best performance in the ring position. However, this influence was observed only for the trunk displacement, deceleration time, movement units, straightness index and mean velocity. In contrast, there was no influence of positions on 7-month-old infants’ reaching performance. Regarding the correlations, it was observed that infants with more level of trunk control showed a better performance when reaching, regardless of position and the age assessed.     

Empathy is Associated with Meaning of Life and Mental Health Treatment but not Religiosity Among Brazilian Medical Students

The purpose of this study was to investigate the influence of spirituality, religiosity, personal beliefs, and previous contact with health issues on the level of empathy in medical students. Jefferson Scale of Empathy—Student Version, WHOQOL-Spirituality, Religiousness and Personal Beliefs, and Duke University Religion Index were applied to 285 Brazilian medical students. The findings suggest that meaning of life and previous mental health treatment but not Religiosity were positively related to empathy. We suggest that more attention should be given for prevention and treatment of mental health issues, and further studies are needed to understand and replicate these findings.     

On the Philosophy of Bitcoin/Blockchain Technology: Is it a Chaotic,Complex System?

The philosophy of blockchain technology is concerned, among other things, with blockchain ontology, how it might be characterised, how it is being created, implemented, and adopted, how it operates in the world, and how it evolves over time. This paper concentrates on whether Bitcoin/blockchain can be considered a complex system and, if so, whether it is a chaotic one. Beyond mere academic curiosity, a positive response would raise concerns about the likelihood of Bitcoin/blockchain entering a 2010‐Flash‐Crash‐type of chaotic regime, with catastrophic consequences for financial systems based on it. The paper starts by highlighting the relevant details of the Bitcoin/blockchain ecosystem formed by the blockchain itself, bitcoin end users (payers and payees), capital gains seekers, miners, full nodes maintainers, and developers, and their interactions. Then the Information Theory of Complex Systems is briefly discussed for later use. Finally, the blockchain is investigated with the help of Crutchfield's Statistical Complexity measure. The low non‐null statistical complexity value obtained suggests that the blockchain may be considered algorithmically complicated but hardly a complex system and unlikely to enter a chaotic regime.     

Assessing reading comprehension with narrative and expository texts: Dimensionality and relationship with fluency,vocabulary and memory

Reading comprehension assessment should rely on valid instruments that enable adequate conclusions to be taken regarding students' reading comprehension performance. In this article, two studies were conducted to collect validity evidence for the vertically scaled forms of two Tests of Reading Comprehension for Portuguese elementary school students in the second to fourth grades, one with narrative texts (TRC‐n) and another with expository ones (TRC‐e). Two samples of 950 and 990 students participated in Study 1, the study of the dimensionality of the TRC‐n and TRC‐e forms, respectively. Confirmatory factor analyses provided evidence of an acceptable fit for the one‐factor solution for all test forms. Study 2 included 218 students to collect criterion‐related validity. The scores obtained in each of the test forms were significantly correlated with the ones obtained in other reading comprehension measures and with the results obtained in oral reading fluency, vocabulary and working memory tests. Evidence suggests that the test forms are valid measures of reading comprehension.     

Resilience,religiosity and treatment adherence in hemodialysis patients: a prospective study

Resilience and religiosity have received attention as an important process in the experience and management of chronic comorbidities; however, there is no study evaluating resilience in hemodialysis patients and its association with other psychological dimensions or with treatment adherence. This observational prospective study assessed resilience (25 item Wagnild and Young Resilience Scale), religiosity under three dimensions (organizational, non-organizational and intrinsic) using DUREL scale, depressive symptoms (Patient Health Questionnaire-9) and health-related quality of life (Short Form-36 questionnaire). The main outcomes were medication adherence using the Morisky Medication Adherence Scale-8 (MMAR-8) and the missing/shortened dialysis sessions in the following six months. Of 208 patients approached, 202 (97.1%) agreed to participate. One hundred twenty-three patients (60.9%) were males and mean age was 52.8 ± 14.8 years-old. The median time on hemodialysis was 36 months (IQR, 12, 84). 82 (40.6%) patients obtained a MMAS-8 score <6 and were considered as having ‘poor adherence’. Overall, the mean score of medication adherence was low (5.7 ± 2.1). About adherence to hemodialysis sessions, patients missed a total of 234 (1.6%) hemodialysis sessions. Forty-eight patients (23.7%) missed an average of at least three sessions in six months. Regarding adherence to medication, there was no association in the uni- or multivariate analysis between religiosity dimensions and MMAS-8 score. After adjustment, resilience was positively associated with MMAS-8 score (standardized β coefficient .239, p = .016). Organized and intrinsic religiosity were associated with adherence to dialysis sessions (standardized β coefficient .258, p = .004 and .231, p = .026, respectively). Interestingly, opposite to medication adherence, more resilient patients were associated with less adherence to hemodialysis sessions (standardized β coefficient ?.296, p = .001). Religiosity was associated with dialysis adherence but not with medication adherence. Resilience was associated with higher medication adherence but lower adherence to dialysis sessions.     

The Minho Word Pool: Norms for imageability,concreteness, and subjective frequency for 3,800 Portuguese words

Words are widely used as stimuli in cognitive research. Because of their complexity, using words requires strict control of their objective (lexical and sublexical) and subjective properties. In this work, we present the Minho Word Pool (MWP), a dataset that provides normative values of imageability, concreteness, and subjective frequency for 3,800 (European) Portuguese words—three subjective measures that, in spite of being used extensively in research, have been scarce for Portuguese. Data were collected with 2,357 college students who were native speakers of European Portuguese. The participants rated 100 words drawn randomly from the full set for each of the three subjective indices, using a Web survey procedure (via a URL link). Analyses comparing the MWP ratings with those obtained for the same words from other national and international databases showed that the MWP norms are reliable and valid, thus providing researchers with a useful tool to support research in all neuroscientific areas using verbal stimuli. The MWP norms can be downloaded along with this article or from http://p-pal.di.uminho.pt/about/databases.     

“Building Hope for the Future”: A Program to Foster Strengths in Middle-School Students

The authors investigated the effectiveness of a 5-week hope-based intervention designed to enhance hope, life satisfaction, self-worth, mental health and academic achievement in middle school students. The study includes a sample of 31 students from a community school, a matched comparison group of 31 students, and 2 secondary groups—guardians and teachers of the students’ intervention group. Students completed a questionnaire packet that included demographic information, the Portuguese versions of the Children’s Hope Scale, Students’ Life Satisfaction Scale, Mental Health and Self-Worth Scales. Academic achievement was obtained from school records. At baseline, groups are statistically similar on the variables of interest. At post-test the intervention group had enhanced hope, life satisfaction and self-worth. In the intervention group, benefits in hope, life satisfaction and self-worth were maintained at the 18-month follow up. Results suggest that a brief hope intervention can increase psychological strengths, and participants continue to benefit up to 1-year and 6-months later.