bluuebunny/crossref_metadata_2025 huggingface dataset:
Los primeros dientes de El caimán barbudo (1966-1967)
Authors: Candiano Leonardo
Published: July 2020

El artículo aborda las polémicas culturales desplegadas en Cuba en los inicios del magazine cultural de la Unión de Juventudes Comunistas, esencialmente las de El caimán barbudo, durante la permanencia de su primer equipo de redacción (1966-1967), que contó con la influencia notoria de la intelectualidad surgida a raíz del trabajo del Departamento de Filosofía de la Universidad de La Habana.

Para tal fin, se analizan los debates de su director, Jesús Díaz, publicados en las revistas Bohemia (1966) y La Gaceta de Cuba (1966), con Ana María Simó (antigua codirectora de la editorial El Puente) y con Jesús Orta Ruiz, conocido como El Indio Naborí. Asimismo, se retoma la polémica entre el equipo editorial de El caimán barbudo y el poeta Heberto Padilla en torno a las novelas de Lisandro Otero Pasión de Urbino (1966) y del ya por entonces emigrado Guillermo Cabrera Infante Tres tristes Tigres (1967).

De este modo, se inquiere en la heterogeneidad que distinguió la práctica cultural de la isla en el período, a la vez que se subraya el afán polemista que caracterizó las discusiones entre arte y política establecidas por las divergentes corrientes estéticas integradas al proceso revolucionario.
Estimación de la temperatura superficial en imágenes históricas Landsat 5 mediante corrección atmosférica monocanal en el térmico para la cuenca del río Tempisque-Bebedero (Costa Rica)
Authors: Martínez-Barbáchano Rubén
Published: July 2020

En las últimas décadas la utilización de imágenes satelitales se ha incrementado al punto de constituir una herramienta fundamental en el monitoreo de procesos ambientales y de cambio global. En tal sentido, la importancia histórica de la familia de satélites Landsat marca un hito en 1985 con la introducción del sensor Tematic Mapper, que ofrecía la posibilidad a los usuarios de adquirir información de una base histórica de más de 25 años de imágenes térmicas a 120 metros de resolución espacial. El presente trabajo se presenta como una metodología de obtención de temperatura superficial a partir de una serie temporal de imágenes Landsat-5 TM adquiridas en el año 2001 sobre el Pacífico norte de Costa Rica. Se presentan los distintos algoritmos que pueden utilizarse para la estimación de temperatura superficial a partir de datos Landsat con el método monocanal por la función inversa de Planck. Aspectos como la transmisividad media de la atmósfera, la radiancia ascendente y descendente, o la emisividad de la superficie terrestre fueron tomados en cuenta, previamente al cálculo de la temperatura de brillo de las imágenes.
Diferenciación de tierras agrícolas en el municipio de Tequisquiapan, Querétaro
Authors: Aguilar-Sánchez Genaro
Published: July 2020

El municipio de Tequisquiapan, estado de Querétaro, México, ha tenido cambios en el uso de la tierra por el crecimiento urbano. El objetivo es realizar una diferenciación de tierras según el condicionamiento ambiental, para después valorar y clasificar tipos de tierras. La metodología se basa en la clasificación de tierras, propuesta por la (FAO, 1997). Como resultado se obtienen 7 clases se tierras: clase |I, cuya limitante es el clima semiseco, al igual que las clases II y III, donde la profundidad del suelo, son poco limitantes, para la producción agrícola. En las clases IV y V, además, de las piedras, poca profundidad del suelo, clima semiseco, tiene relevancia la inclinación del terreno de más del 15 %, que se puede usar para el pastoreo de ganado. En las clases VI y VII, cobra importancia la alta cantidad de rocas , > 50 % de pedregosidad; así como una inclinación mayor del 25 %, se recomienda que se usen para la preservación de la vegetación.
Inpatient Observation After Transition From Intravenous to Oral Antibiotics
Authors: Stromberg Tiffany L. , Robison Alexandra D. , Kruger Jenna F. , Bentley Jason P. , Schwenk Hayden T.
Published: July 2020

OBJECTIVES:

Children hospitalized with infections are commonly transitioned from intravenous (IV) to enteral (per os [PO]) antibiotics before discharge, after which they may be observed in the hospital to ensure tolerance of PO therapy and continued clinical improvement. We sought to describe the frequency and predictors of in-hospital observation after transition from IV to PO antibiotics in children admitted for skin and soft tissue infections (SSTIs).

METHODS:

We conducted a retrospective cohort study of children with SSTIs discharged between January 1, 2016, and June 30, 2018, using the Pediatric Health Information System database. Children were classified as observed if hospitalized ≥1 day after transitioning from IV to PO antibiotics. We calculated the proportion of observed patients and used logistic regression with random intercepts to identify predictors of in-hospital observation.

RESULTS:

Overall, 15% (558 of 3704) of hospitalizations for SSTIs included observation for ≥1 hospital day after the transition from IV to PO antibiotics. The proportion of children observed differed significantly between hospitals (range of 4%–27%; P < .001). Observation after transition to PO antibiotics was less common in older children (adjusted odds ratio [aOR] = 0.69; 95% confidence interval [CI] 0.52–0.90; P = .045). Children initially prescribed vancomycin (aOR = 1.36; 95% CI 1.03–1.79; P = .032) or with infections located on the neck (aOR = 1.72; 95% CI 1.32–2.24; P < .001) were more likely to be observed.

CONCLUSIONS:

Children hospitalized for SSTIs are frequently observed after transitioning from IV to PO antibiotics, and there is substantial variability in the observation rate between hospitals. Specific factors predict in-hospital observation and should be investigated as part of future studies aimed at improving the care of children hospitalized with SSTIs.
COVID-19 and Keeping Clean: A Narrative Review To Ascertain the Efficacy of Personal Protective Equipment To Safeguard Health Care Workers Against SARS-CoV-2
Authors: Sud Sohil R.
Published: July 2020

Identifying the optimal amount of personal protective equipment (PPE) is a formidable challenge when faced with a new contagion such as severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). Unequivocally, there are dangers to health care workers (and by extension, their patients, colleagues, and communities) if not enough equipment is donned to safeguard them. And yet, there are also dangers to patients, colleagues, and the community if resources are overconsumed and result in hoarding, shortages, and inequitable distribution, all of which are occurring as the worldwide coronavirus disease 2019 (COVID-19) pandemic continues.

Research to ascertain the precise PPE required to defend specifically against SARS-CoV-2 encompasses an area of active investigation that will likely remain unresolved for some time. While awaiting more definitive conclusions, we must look to past evidence to provide a reasonable basis on which protocols and policies might be refined. What follows is a narrative review of PPE efficacy and how existing evidence might apply to protecting health care workers against COVID-19. Findings are extrapolated from investigations in 4 general domains: early investigations into SARS-CoV-2, retrospective studies about severe acute respiratory syndrome coronavirus 1, prospective studies of influenza and other common respiratory viruses, and laboratory PPE studies.

Available evidence suggests that contact and droplet precautions, in addition to eye protection and standard hygiene measures, should be adequate in the vast majority of clinical settings when caring for patients with SARS-CoV-2. Adherence to guidelines promoting appropriate levels of PPE should safeguard practitioners while mitigating against resource overuse.
Praxissemester abroad
Authors: Stenger Miriam
Published: July 2020

Miriam Stenger, Studentin im 4. Semester des Bachelorstudiengangs „Bibliotheks- und Informationsmanagement“, absolvierte ein Praxissemester im Ausland. In diesem Beitrag berichtet sie von ihren Erfahrungen in dem National Bibliographic Office der maltesischen Nationalbibliothek, der maltesischen Publikationslandschaft und den Besonderheiten der maltesischen Nationalbibliothek.
Wo man sucht und was man findet?
Authors: Ude Albrecht
Published: July 2020

Hamburg ist die Tee-Stadt des europäischen Kontinents. Nur in London wird mehr Tee umgeschlagen. Der Im- und Export mit dem aromatischen Produkt wird durch einige alteingesessene Firmen abgewickelt, die teilweise seit Jahrhunderten im Geschäft sind. Die zu finden, sollte ja wohl nicht schwer sein!? Ein Beispiel für eine Allerweltsfrage, Datenquellen, Recherchewerkzeuge und den alltäglichen Frust.
Berufsfeld Medien- und Bibliothekspädagogik
Authors: Wildeisen Sarah
Published: July 2020

Mit einem Beitrag zum Thema „Medienpädagogik in Bibliotheken“ war eine kleine Delegation des Studiengangs Bibliotheks- und Informationsmanagement der HAW Hamburg am 29.01.2020 auf dem 5. Forum Bibliothekspädagogik in Leipzig. Auf der Fachtagung wurden verschiedene bibliothekspädagogische Projekte und Veranstaltungsformate vorgestellt. Bei einer Podiumsdiskussion wurden die Unterschiede und Gemeinsamkeiten der verschiedenen „Bindestrich-Pädagogiken“ besprochen und definiert.
Rollenwechsel oder Sharing is Happiness
Authors: Kissel Mathias , Spree Ulrike
Published: July 2020

In der Zeit vom 05.03.2020 bis zum 15.03.2020 haben die Autor*innen einen Train-the-Trainer-Workshop zu Methoden der Usability-Evaluation (Schwerpunkt Usability-Testing) für Mitarbeiter*innen eines äthiopischen IT-Beratungsunternehmens in Addis Abeba organisiert und durchgeführt. Im Beitrag werden das didaktische und inhaltliche Konzept und der Ablauf des Workshops vorgestellt. Die Erfahrungen werden anhand der drei User Experience Prozessschritte “anticipated use”, “effectice and efficient handling of task” und "processing of usage” reflektiert.
IMPROVEMENT OF CRITICAL THINKING ABILITY IN ACID BASE MATERIAL THROUGH THE APPLICATION OF EDMODO-BASED DISCOVERY LEARNING MODEL
Authors: Cola Nova , Nuswowati Murbangun
Published: July 2020

This study aimed to determine the improvement of students' critical thinking abilities through the application of edmodo's assisted discovery learning model. The study was conducted on students of class XI MIPA 2 high school 2018/2019. This study used a true experimental design in the form of a pre-test and post-test control group design. Sampling was done by a cluster random sampling technique. Data collection used reasoned multiple choice test instruments and questionnaires. The result of test analysis of students' critical thinking skills showed that the average post-test value of the experimental class was lower than the control class. The N-gain test result showed that the magnitude of the increasing of the experimental class was 0.43 lower than the control class which is equal to 0.57. The application of edmodo assisted discovery learning model had a positive effect on students' critical thinking abilities with a low category as indicated by the correlation coefficient of 0.37 and the magnitude of the influence given is 14.08%. The conclusion of this study is the application of edmodo assisted discovery learning model can improve students' critical thinking skills. Furthermore, students agree to use edmodo's assisted discovery learning model for acid base learning.
APPLICATION OF CONSTRUCTIVISM–BASED STUDENTS’ WORKSHEET TO INCREASE STUDENTS ACTIVITIES AND LEARNING OUTCOMES
Authors: Susilawati Susilawati , Copriady Jimmy , Erna Maria , Hasnah Hasnah , Nisa Nurul Aulia , Rahmatya Okma
Published: July 2020

Information gained from lecturers of organic chemistry study program in chemical education Riau University, student activities and learning outcomes are still relatively low. The researchers believe that contructivism -based students’ worksheet as a new learning method is needed to overcome the problem. The study was conducted using the application of contructivism-based students worksheet in organic chemistry  II  subject to increase students activities and their learning outcomes.The data were collected by observation and test. Statistics descriptive qualitative and quantitative were used to analyze the data. The data of learning outcomes were analyzed by Shapiro- Wilks normality, Wilcoxon hypothesis test and paired samples test. The result showed that average values of student activity for each subject namely aldehyde-ketones, carboxylic acids, amines and free radicals were at 37%, 37%, 30%, 36%. The result from wilcoxon and paired samples test, with significant test 0,000 < 0,05 showed that student learning outcomes on organic chemistry II subject by constructivism-based students’ worksheet was improved, It can be seen from average value of the pre-test and post-test were at 19.77; 72.15, respectively.
TRAINING OF SCIENCE LITERACY SKILLS IN CHEMICAL EQUILIBRIUM THROUGH IMPLEMENTATION GUIDED INQUIRY LEARNING
Authors: Triyani Ragil , Azizah Utiya
Published: July 2020

Science literacy is the main key to face challenges in the 21st century. The research aimed to describe the students’ science literacy on chemical equilibrium topic through implementation of guided inquiry learning model. The research design used is One-Group Pretest-Posttest Design. The research was conducted in class XI MIPA 4 of SMAN 3 Surabaya. Data obtained by instruments of multiple-choice tests of science literacy and observation sheet. The result showed that every aspect of students’ science literacy skills was increased in the medium criteria, it was indicated by an average gain score of 0.6 for competence to explain scientific phenomena and to evaluate data and design scientific investigations. Moreover competence of interpreting data and scientific evidence obtained gain score of 0.7. The result of this research indicated that the skill of science literacy had been trained to students.
ANALYSIS OF STUDENTS MISCONCEPTION IN CHEMICAL EQUILIBRIUM MATERIAL USING THREE TIER TEST
Authors: Khairunnisa Khairunnisa , Prodjosantoso AK.
Published: July 2020

This study aimed to analyze students misconception seen from the relationship between the results of the three tier test and interviews about chemical equilibrium material on the concept of determining the formula Kc, Kp, and the concept of Kc calculation. The research method was descriptive qualitative method. The data collection technique in this study was a test. The research instrument was in the form of three tier test questions consisted of four concepts. The misconceptions were analyzed based on the result of tests given to 30 students were further clarified by interviewing as matching answers. The study was conducted at SMA Negeri 2 Wonosari in Gunungkidul Regency with five interviewed research subjects. The result showed that students experienced misconceptions about the concept of determining the Kc formula by 23.33%, determining the Kp formula by 13,33%, and concept of Kc calculation by 16,67%.
Multiplicity Control vs Replication
Authors: Hunter Andrew , Beribisky Nataly , Farmus Linda , Cribbie Robert A.
Published: July 2020

This paper presents a side-by-side consideration of multiplicity control procedures and replication as solutions to the problem of multiplicity. Several independent theoretical arguments are presented which demonstrate that replication serves several important functions, and that multiplicity control procedures have a number of serious flaws. Subsequently, the results of a simulation study are provided, showing that under typical conditions, replication provides similar familywise error control and power as multiplicity control procedures. Taken together, these theoretical and statistical arguments lead to the conclusion that researchers who are concerned about the problem of multiplicity should shift their attention away from multiplicity control procedures and towards increased use of replication.
The Impact Areas Questionnaire (IAQ): A Music Therapy Service Evaluation Tool
Authors: Tsiris Giorgos , Spiro Neta , Coggins Owen , Zubala Ania
Published: July 2020

Service evaluation is a professional requirement for music therapy practitioners and organisations. Yet service evaluation findings are rarely published within the professional literature, and there is limited documentation of the processes and methods of such evaluations, including the rationale, dilemmas, and challenges encountered. This is perhaps due to the perceived status, methodological weaknesses, and context-specificity of service evaluation work. Drawing on our engagement with service evaluation in diverse settings, we have become aware of its potential beyond its typical current uses in the field as well as of the need for open discussion and debate about the service evaluation tools that are available. This is where the aim of this paper lies: to introduce a service evaluation tool, the Impact Areas Questionnaire (IAQ), alongside the studies that led to its construction. Developed originally through a review of 27 individually designed service evaluation projects, this questionnaire contains a number of different impact areas. Adopting an ecological perspective, these areas refer to music therapy’s perceived impact not only on service users, but also on families/carers/friends, staff, and the organisational context in its entirety. Following its original development within Nordoff Robbins England and Wales, this questionnaire was tested in the context of Nordoff Robbins Scotland with the aim of exploring its applicability and transferability to other music therapy settings. In addition to presenting the findings of this testing, we discuss the potential use of the IAQ, which is included as an appendix to this article, in other settings and its relevance for knowledge and policy making in the field.
Music as the Medicine of Trauma among Refugees in Arizona
Authors: Muriithi Bernard Austin Kigunda
Published: July 2020

This paper presents outcomes of a phenomenological study conducted to explore the lived experience of refugee musicians. Purposive and snowball sampling methods were used to identify six musicians who performed in the cities of Phoenix and Tucson and had been involved in music prior to entering the United States. The primary data gathering method was structured and unstructured interviews, but observations were made for the musicians who performed in public events during the study period. Audio and video recordings were made and photographs taken during these performances. Study outcomes show that the musicians have persisted in music performance as their primary method of healing trauma and negative emotions. Traumatic experience resulted in their fleeing from their homes and seeking refuge in other countries. After being resettled in the United States, they continue to suffer from the experience of loss, need to adapt and change, and struggle with trauma and negative emotions. Music is their method of healing trauma and facilitating integration. Music produces healing through 1) like a painkiller, enabling them to forget problems that result in distress, 2) being their means to communicate a message of hope, and 3) enabling integration, thus reducing isolation and loneliness.
Institutional violence in high-risk pregnancy in the light of pregnant women and nurses
Authors: Brilhante Ana Paula Cavalcante Ramalho , Jorge Maria Salete Bessa
Published: July 2020

ABSTRACT Objective: to understand the perception of high-risk nurses and pregnant women about institutional violence in access to basic and specialized care networks in pregnancy. Method: a qualitative study developed from March to June 2017 in the city of Fortaleza, state of Ceará, with nurses and pregnant women at high risk. A semi-structured interview was used, analyzed by the thematic analysis technique. Three categories emerged: access of pregnant women to care networks; institutional violence in the perception of nurses; and institutional violence in the perception of pregnant women. Results: participants revealed deficiencies in knowledge about institutional violence. Nurses perceived this violence in the lack of resources and access, few recognized as a violation of rights. The pregnant women reported deficient access to care networks, medicines, tests, and did not perceive this difficulty as violence. Final considerations: institutional violence is present in high-risk pregnancy, nurses and pregnant women do not always perceive this violence as a violation of rights.
Peripheral venous access using devices over needles with and without extension: costs and outcomes
Authors: Lima Antônio Fernandes Costa , Saba Amanda , Neves Filho Abílio Gonçalves das , Couto Karen Aparecida , Silva Luciana Oliveira e
Published: July 2020

ABSTRACT Objectives: to analyze the mean direct cost and peripheral venous access length outcomes using devices over needle with and without extension. Methods: quantitative, exploratory-descriptive research. Venous punctures and length of the devices were followed. The mean direct cost was calculated by multiplying the time (timed) spent by nursing professionals by the unit cost of labor, adding to the cost of materials. Results: the total mean direct cost of using devices “with extension” (US$ 9.37) was 2.9 times the cost of using devices “without extension” (US$ 4.50), US$ 7.71 and US$ 2.66, respectively. Totaling 96 hours of stay, the “device over needle with extension” showed a lower occurrence of accidental loss. Conclusions: the use of the “device over needle with extension”, despite its higher mean direct cost, was more effective in favoring adequate length of peripheral venous access.
The systems and signs of political militants in/of Brazilian nursing
Authors: Almeida Deybson Borba de , Silva Gilberto Tadeu Reis da , Freitas Genival Fernandes de , Santos Nívia Vanessa Carneiro dos , Almeida Igor Ferreira Borba de , Silva Deivison Oliveira da
Published: July 2020

ABSTRACT Objectives: to analyze the systems and signs in the constitution of militant nurses. Methods: a historical and qualitative research based on oral history carried out with 11 nurses who had been working in the professional field since 1980. Data collected from semi-structured interviews were organized into NVivo software 10, being analyzed through dialectical hermeneutics. Results: systems and signs are systems that allow us to use senses, symbols or meaning to objectify and subjectivate the subject. The revealed senses were categorized and divided into improper, religious, heroic, communist, and socially involved. Conclusions: militancy signs are convergent with what is put in national and international literature. The difference found was in the heroic sense and implicated with the social. Militant is almost never associated with positive aspects. An individual who builds himself as a political being empowers himself as a social being, making knowledge of power, generating a break in traditional models.
Generating meaningful conversation: World Café in strategic interprofessional planning in Continuing Education
Authors: Bazilio Jennifer , Pereira Jessica de Aquino , Figueira Maura Cristiane e Silva , Silva Eliete Maria
Published: July 2020

ABSTRACT Objectives: to present the particularities of the World Café, identifying the main aspects that characterize a planning strategy for a constructive, interactive, and participative dialogue of the individuals, aiming at collaborative and innovative learning. Methods: a World Café method workshop with 24 professionals from the teams that work in basic health units. Results: we obtained three analysis categories: Individual Needs, Group Needs, and Institutional Needs, which resulted in the Municipal Plan of Actions on Continuing Health Education. Conclusions: we found that the World Café was adequate and relevant for the discussion of key themes, for the practices of teams in Primary Care and the production and organization of data in a collective space. Final Considerations: the method can contribute to the construction of knowledge and proximity to the daily reality of interdisciplinary teams, as well as serving as a tool in the preparation of planning in Permanent Education.
Criança, infância e educação infantil: pressupostos das pesquisas
Authors: Soares Ademilson de Sousa
Published: July 2020

RESUMO O artigo apresenta uma memória bibliográfica das pesquisas para, com e sobre criança, infância e educação infantil, apontando autores e textos assumidos como pressupostos epistemológicos desse emergente campo de investigação. Sem a pretensão de fazer análise exaustiva, o texto expõe as referências predominantes entre os pesquisadores por meio de uma pesquisa teórica e bibliográfica construída com base em todas as referências utilizadas entre os anos de 2006 e 2016. A partir dos termos “criança”, “infância” e “educação infantil” foram catalogadas em bancos de dados todas as fontes bibliográficas citadas em dissertações, teses, artigos de revistas e trabalhos completos apresentados nas reuniões anuais da Associação Nacional de Pós-Graduação e Pesquisa em Educação (Anped) disponíveis on-line. Após o exame de todo o material, foram identificados autores e textos mais citados pelos pesquisadores. Como resultado, fica evidenciada uma diversidade de aportes teóricos e metodológicos como base epistêmica da memória bibliográfica desse campo de pesquisa.
Quality of life of adolescents with cerebral palsy: agreement between self-report and caregiver’s report*
Authors: Ferreira Mariana Ceravolo , Garcia Nathália Ribeiro , Prudente Cejane Oliveira Martins , Ribeiro Maysa Ferreira Martins
Published: July 2020

Objective: to assess the quality of life (QOL) of adolescents with cerebral palsy (CP) by self-report and by the caregiver’s report, and to analyze the agreement between these reports. Method: cross-sectional study conducted with 101 adolescents with CP and 101 caregivers. Both answered the Pediatric Quality of Life Inventory (PedsQL), module 4.0 - Generic (PedsQL 4.0) and module 3.0 - PC (PedsQL 3.0). Agreement between reports was analyzed using the Mann-Whitney test and the intra-class correlation coefficient (ICC) (p<0.05). Results: the lowest scores were in physical health, school activities and fatigue in the self-report. The lowest scores were in physical health and daily activities, in the caregivers’ report. Perceptions among adolescents and caregivers differed in physical health, movement and equilibrium, daily and school activities, with a lower score for caregivers in all of them. The agreement between the self-report and the caregivers’ report was poor (ICC<0.44) and in both instruments, the caregivers’ report was less optimistic. Conclusion: physical health is the most impaired domain of the QOL of adolescents with CP, both in the self-report and in the caregivers’ report. However, there is poor agreement between these reports, emphasizing that the use of the caregivers’ report should be cautious.
A inovação-restauração das formas democráticoburguesas como característica da revolução passiva no Brasil
Authors: Gomes Cláudia Maria Costa , Souza Ana Karoline Nogueira de
Published: July 2020

Resumo A análise apresentada neste artigo objetiva retomar os elementos da formação social brasileira com enfoque nas características da democracia e as formas da dominação burguesa realizada no Brasil. Desse modo, buscou-se compreender a complexidade da realidade social a partir da teoria social de Marx e através da metodologia da tradutibilidade foi possível aplicar a categoria gramsciana de revolução passiva na realidade brasileira. A ampla incursão bibliográfica apontou que a reprodução das relações sociais incide nos limites da emancipação política brasileira e avança para formas orgânicas antidemocráticas. Concluímos, portanto, que a revolução pelo alto se constitui como uma determinação do capitalismo dependente.
Justiça racial e direitos humanos dos povos e comunidades tradicionais
Authors: Gomes Daiane de Oliveiva , Brandão Wanessa Nhayara Maria Pereira , Madeira Maria Zelma de Araújo
Published: July 2020

Resumo O objetivo deste artigo é contextualizar o cenário atual de crescimento do autoritarismo, de ataques aos direitos humanos e à democracia, tendo como eixo analítico e político a categoria raça. Interessa compreender a questão racial nas agendas das políticas públicas e dos direitos humanos dos povos e comunidades tradicionais, em particular os indígenas e quilombolas e os efeitos perversos do projeto de colonialidade. Conclui-se que a herança e a recriação da escravidão e o racismo estrutural estão fortalecidos em um contexto em que se proliferam discursos e práticas públicas de ódio e outras formas de intolerância. Em paralelo, a agenda dos direitos humanos e das políticas públicas segue reproduzindo o silenciamento e a morosidade quando se trata da pauta das desigualdades e subordinações raciais.
O “equívoco” como morte negra, ou como “naturalizar” balas racializadas
Authors: Marques Junior Joilson Santana
Published: July 2020

Resumo O artigo apresentado pretende realizar reflexão inicial sobre genocídio da população negra com enfoque no que vamos chamar de “assassinato por equívoco”. O conceito de genocídio está amparado em Vargas (2010) e Almeida (2015) que, de modo geral, trabalham com a concepção da Organização das Nações Unidas (ONU), que coloca o genocídio como destruição física e ou cultural de parte ou de todo um grupo étnico/racial. Os assassinatos de que tratamos são de negros moradores do Rio de Janeiro e região metropolitana que foram assassinados por “engano” por agentes do Estado. A coleta desses casos ocorreu via mídia eletrônica. Trabalhamos com o escopo de reportagens a fim de traçar uma discussão entre violência de estado, racismo e “naturalização” do genocídio. Por fim, percebemos que os assassinatos por “equívoco” têm se tornado um crescente e têm demonstrado a “naturalização” da morte negra justiçada pela criminalização dessa população.
INSULIN AND INSULIN RECEPTOR GENE POLYMORPHISMS AND SUSCEPTIBILITY TO NONALCOHOLIC FATTY LIVER DISEASE
Authors: NOBAKHT Hossein , MAHMOUDI Touraj , SABZIKARIAN Mohammad , TABAEIAN Seidamir Pasha , REZAMAND Gholamreza , ASADI Asadollah , FARAHANI Hamid , DABIRI Reza , MANSOUR-GHANAEI Fariborz , MALEKI Iradj , ZALI Mohammad Reza
Published: July 2020

ABSTRACT BACKGROUND: Nonalcoholic fatty liver disease (NAFLD) is an increasing global health concern defined by excessive hepatic fat content in the absence of excessive alcohol consumption. OBJECTIVE: Given the pivotal role of insulin resistance in NAFLD, we hypothesized that insulin (INS) and insulin receptor (INSR) gene polymorphisms may be associated with NAFLD risk. METHODS: A total of 312 subjects, including 153 cases with biopsy-proven NAFLD and 159 controls were enrolled in this case-control study. Four polymorphisms in INS (rs3842752, rs689) and INSR (rs1052371, rs1799817) genes were genotyped using PCR-RFLP method. RESULTS: The cases with NAFLD were older and had higher BMI, systolic blood pressure, diastolic blood pressure, as well as higher serum levels of aspartate aminotransferase, alanine aminotransferase, and gamma glutamyl transferase than the controls (P<0.001). The “TT” genotype of INSR rs1799817 compared with “CC” genotype occurred more frequently in the controls than the cases with NAFLD and the difference remained significant after adjustment for confounding factors (P=0.018; OR=0.10, 95%CI=0.02-0.76). However, no significant difference was found for INS rs3842752, INS rs689, and INSR rs1052371 gene polymorphisms between the cases with NAFLD and the controls either before or after adjustment for the confounders. CONCLUSION: These findings corroborate the hypothesis that genetic polymorphisms related to insulin resistance play a role in NAFLD susceptibility. Specifically, the INSR rs1799817 “TT” genotype had a protective effect for NAFLD. However, our results remain to be validated in other studies.
Supervised Curricular Internship in Clinical Psychology in the Light of the DCNs
Authors: Pereira Mara Dantas , Nunes Andrea Karla Ferreira , Pereira Míria Dantas
Published: July 2020

This article aims to discuss the implementation process of the supervised curricular internship in clinical psychology, from the period of regulation of the profession, to the formalization of the National Curricular Guidelines for undergraduate courses in Psychology, based on the scientific literature. The stimulus for the preparation of this study is based on the recognition of the relevance of the improvement of student interns for the professional training of the Brazilian psychologist. An integrative literature review was used as a methodology, based on the search for scientific publications indexed in the databases: SciELO, PePSIC and ERIC. The following descriptors were used: clinical psychology, education, clinical internship, student and universities. At the end of the searches, 25 studies were selected that covered the Brazilian reality, between the years 1989 to 2020, which met the eligibility criteria to compose the article. It seeks to understand, throughout the article, the needs, the teaching and learning methods during the supervised internship, which must be aligned with the theory learned during the course with the practical actions of the Psychologist's doing, so that it allows a clinical reasoning and an ethical stance. It is concluded that the study also proposes that it is essential that higher education institutions evaluate and renew the Clinic-school, so that students are trained and committed to providing support to society, since these institutions are responsible for providing training of highly qualified Psychologists and, in this conception, citizens should be able to act in the face of the typical demands of the 21st century.
Early-age shrinkage of cement pastes with polypropylene and curaua fibres
Authors: dos Santos Motta Mariana , Souza Lourdes Maria Silva , de Andrade Silva Flávio
Published: July 2020

The aim of this research was to investigate the effect of the addition of discrete polypropylene fibres (PPF) and curaua fibres (CF) on the early-age autogenous and drying shrinkage of cement pastes. The fibres used were 12 mm long and the volume fraction varied from 0.3 kg/m3 (0.03%) to 2.7 kg/m3 (0.30%). Autogenous, unrestrained and restrained drying shrinkage tests were performed and it was found that the addition of these fibres influenced the different shrinkage behaviours. A significant reduction in autogenous shrinkage was observed in the specimens with 2.7 kg/m3 of CF, especially in the first few hours of curing. Regarding the unrestrained drying shrinkage, the addition of 2.7 kg/m3 of CF led to only a slight improvement (by about 8.5%) and lower fibre contents had little or no influence. The addition of PPF slight reduced the unrestrained drying shrinkage (by about 8.13%) for all the evaluated fibre contents. Both fibres delayed the development of cracks and reduced crack opening during the restrained drying tests. The addition of 2.7 kg/m3 of PPF or CF delayed cracking by 23% and 18%, respectively. The results indicate that discrete CF can be potentially used to restrain the autogenous and drying shrinkage of cementitious materials.
Influence of high-volume limestone powder on hydration and microstructural development of cement
Authors: Zhu Pengfei , Yang Guohui , Jiang Linhua , Shi Yanran , Xu Ning , Jin Ming , Gu Yue
Published: July 2020

Limestone powder has been widely used in concrete structures because of its easy availability and positive effect on reducing the heat of hydration. The addition of limestone powder has a significant influence on the hydration and microstructure of cement paste and therefore affects the strength and durability of concrete. This paper examines the hydration and microstructure of cement paste blended with limestone powder using multiple techniques. The results reveal that when the content of limestone powder is up to 50 wt%, the compressive strength, cumulative heat and portlandite show a significant reduction. However, the addition of limestone powder has no effect on the species of hydration products and pore solution composition in cement paste specimens. The porosity and relative threshold diameter of cement paste samples increase while the pore volume (<50 nm) decreases with the increase in limestone powder content. The total electrical resistance of continuously and discontinuously connected pores in cement paste samples has an exponential relationship with the threshold diameter and a linear relationship with the pore volume (<50 nm) and porosity.
Conflicts between reinforced concrete design assumptions and actual concrete behaviour
Authors: Kotsovos Michael D
Published: July 2020

Reinforced concrete (RC) design is in a state of perpetual revision of ever-increasing complexity. However, preventing the recurrence of unexpected types of brittle failure is yet to be achieved. It is argued that the causes of such types of failure reflect conflicts between assumed and actual behaviour of concrete at both material and structural levels. This paper presents available information on the fundamental properties of concrete, which current design assumptions are incompatible with, and points towards the work required for really improving RC design.
A dynamic model for a defective periodic viaduct under harmonic seismic waves
Authors: Lu Jian-Fei , Feng Qing-Song
Published: July 2020

An analytical model for the dynamic response of a defective periodic viaduct (DPV) (i.e. an infinite periodic viaduct containing a defective span) to harmonic seismic waves is proposed. In the proposed model, the viaduct is divided into three parts – left and right semi-infinite ordered periodic viaducts (SOPVs) and the defective span. The total responses of the left and right SOPVs consist of two parts – a free part and a scattered part. The free-part responses are associated with the forced vibration of the corresponding SOPVs due to seismic waves, while the scattered-part responses are relevant to the scattered characteristic waves of the ordered periodic viaduct (OPV) in the SOPVs. The amplitudes of the scattered characteristic waves in the left and right SOPVs can be determined by using the transfer matrix of the defective span. The numerical results suggest that when a DPV is subjected to harmonic seismic waves, a resonance-type response will occur. It was also found that, for the DPV, there are two kinds of resonance frequencies: the frequencies associated with the corresponding OPV and additional frequencies due to the presence of the defective span.
In-plane strengthening of masonry buildings with timber panels
Authors: Pozza Luca , Marchi Luca , Trutalli Davide , Scotta Roberto
Published: July 2020

The in-plane strengthening of masonry walls plays a key role in the improvement of the global seismic behaviour of masonry buildings. Various strengthening techniques are currently available, such as coatings, confinement or injection and the use of cement-based materials or steel- or fibre-reinforced polymers or mortars. In this work, two innovative strengthening techniques for existing masonry buildings were investigated: the use of glued or nailed timber wall panels connected to the outer and/or inner face of the masonry wall. Their effectiveness in reducing the seismic vulnerability of existing masonry walls was assessed in tests and numerical simulations. The test results demonstrated improvements in strength, rocking displacement capacity and energy dissipation capacity. The numerical analyses, conducted with non-linear models calibrated on experimental results available in the literature, confirmed the advantages of these interventions, comparing the effects of using monolithic or coupled glued or nailed wall panels, provided that particular attention is given to their connection to the existing structure.
Embedding strength of Brazilian woods and recommendation for the Brazilian standard
Authors: Molina Julio Cesar , da Silva Ribas Junior Amauri , Luis Christoforo André
Published: July 2020

The design of dowelled connections for timber structures based on the Brazilian standard NBR 7190 results in an excessive number of fasteners due to the low value obtained for the wood embedding strength when using the calculation model proposed by the standard. The main objective of this research was to study, experimentally and analytically, the embedding strength of Brazilian reforestation woods according to US and European standards (ASTM D 5764 and EN 1995-1-1:2004) in order to propose a better embedding model for the Brazilian norm for wooden structures. Test specimens were made using Pinus elliottii (softwood) and Eucalyptus saligna (hardwood) and steel fasteners of diameter 6.35 mm. For P. elliottii, the experimental values of embedding strength obtained using D 5764 approached the analytical values. However, for E. saligna, the analytical embedding strengths obtained using D 5764 were higher than the experimental embedding strengths. The model proposed by the European standard proved to be more suitable for obtaining the wood embedding strength. For the European standard, smaller dispersions of data that relate wood density to embedding load were obtained, indicating the better accuracy of the European model.
Vibration performance assessment of a long-span steel footbridge
Authors: Rezende Filipe A. , Varela Wendell D. , Carvalho Eliane Maria L. , Pereira André M. B.
Published: July 2020

To meet the basic requirements of long spans, steel footbridges are generally lightweight structures with low stiffness. Moreover, current trends in innovative structural design have led to more vibration problems related to resonance or quasi-resonance of footbridge structures at typical pedestrian walking frequencies. The present authors apply a feasible methodology to assess the vibration performance of footbridges based on an equivalent beam model developed from a detailed finite-element model and experimental measurements. Free- and induced-vibration tests are performed on a long-span inverted-queen-post-truss steel footbridge located in Rio de Janeiro, which exhibits vibration problems. Pedestrian walking simulations are performed with the simplified footbridge model using a typical dynamic load given from a Fourier series, as well as with a biodynamical formulation that considers human–structure interactions. The equivalent beam model provides a practical means of investigating corrective intervention strategies for the problem of excessive footbridge vibration using tuned mass dampers, and allows the in-service footbridge performance to be assessed based on current standards and design guidelines.
Control para el voltaje de salida de un inversor multinivel de capacitores flotantes
Authors: Aguilar-López Beatriz Angélica , Juárez-Abad José Antonio , Barahona-Avalos Jorge Luis , Mayoral-Lagunes Rosalino , Linares-Flores Jesús , Contreras-Ordaz Marco Antonio
Published: July 2020

Este artículo presenta el diseño de un controlador mediante la técnica de rechazo activo de perturbaciones para el seguimiento de la trayectoria de referencia para el voltaje de salida de un inversor multinivel de capacitores flotantes. Si en el modelo dinámico del convertidor se consideran las dinámicas de cada capacitor flotante y adicionalmente, las de los elementos pasivos del filtro de salida, el modelo resultante es de un orden alto, lo que dificulta su control. En este trabajo se emplea la modulación PS-PWM para mantener los voltajes en los capacitores flotantes en sus valores nominales y de esta manera poder generar un modelo dinámico simple, que resulta ser más fácil de controlar. Los resultados de simulación y experimentales, confirman que el controlador es robusto a perturbaciones provocadas por cambios en la carga, sin importar si son de tipo lineal o no lineal. Se realizó la construcción del prototipo experimental del sistema y se implementó el controlador y modulador en un FPGA y en la parte final se muestran los resultados obtenidos.
ddPCR Titration of Lentivirus Vectors v1
Authors: The Nonprofit Plasmid Repository Addgene
Published: July 2020

This protocol describes ddPCR titration of Lentivirus vectors. To see the full abstract and additional resources, visit https://www.addgene.org/protocols/lentivirus-ddpcr-titration/. This protocol was modified from the publication Wang Y, Bergelson S, Feschenko M, 2018. Sample Data: When analyzing data there should be a clear distinction between negative droplets (black) and positive droplets (blue/green). The concentration of RRE positive droplets in the untransduced control should be close to zero (A01). In this protocol, the lentiviral particles are serially diluted and used to transduce HEK293T cells. Genomic DNA is extracted from the target cells and assayed for integrated copies of RRE. Since the samples that are assayed are diluted 2-fold serially, the concentration of RRE positive droplets should decrease by a factor of 2 across the dilutions. RPP30 copies should be relatively constant across samples. In the RRE example below, 2-fold serial dilutions of a sample were loaded in wells B01-H01. As shown in the image and table below, the concentration of RRE positive droplets increases by a factor of ~2 as you progress from the higher dilutions to the lower dilutions (blue). The concentration of RPP30 positive droplets stays relatively even across samples (green). To increase the accuracy of the titer, calculate and average of several dilutions.
State-of-Charge Estimation of Lithium-Ion Battery Based on Extended Kalman Filter Algorithm
Authors: Xiaogang Wu , Li Xuefeng , Shurov Nikolay I. , Shtang Alexander A. , Yaroslavtsev Michael V. , Dedov Sergei I.
Published: July 2020

As the core component of electric vehicle, lithium-ion battery needs to adopt effective battery management method to prolong battery life and improve the reliability and safety. The accurate estimation of the battery SOC can be used to prevent the battery over charge and over discharge, reduce damage to the battery and improve battery performance, which plays a vital role in the battery management system. The study of battery SOC estimation mainly focused on the battery model construction and SOC estimation algorithm. Aiming at the problem that the state of charge (SOC) of electric vehicle is difficult to be accurately estimated under complex operating conditions, based on the parameter identification of the equivalent circuit of a ternary polymer lithium-ion battery, an Extended Kalman Filter (EKF) algorithm was used to estimate the SOC of the ternary polymer lithium-ion battery. Simulation and experimental results show that the estimation of SOC can be carried out by using the EKF algorithm under the conditions of China Passenger Car Condition (Chinacar) and new European driving cycle (NEDC) Compared with the coulomb counting method, the average error of SOC estimation can be realized is 1.042% and 1.138% respectively, the maximum error within 4%. Application of this algorithm to achieve SOC estimation has good robustness and convergence
La percepción de jugadores de esports sobre su aprendizaje de lengua extranjera
Authors: Postigo Fuentes Ana Yara , Fernández Navas Manuel
Published: July 2020

El crecimiento de la industria de los videojuegos, y en concreto de los eSports, en diferentes países y el hecho de que estos se jueguen en línea han permitido y fomentado la comunicación de jugadores españoles con jugadores hablantes de una lengua distinta a la de ellos. Estos jugadores han vivido también la enseñanza de la lengua extranjera en la escuela. Atendiendo a estas circunstancias hemos querido comprender cómo han percibido este proceso en ambos contextos y cómo los videojuegos lo han afectado. Para ello se ha llevado a cabo un estudio de caso. Esta investigación nos ha permitido comprender qué oportunidades presentan estas competiciones de videojuegos para el aprendizaje de una lengua extranjera.