bluuebunny/crossref_metadata_2025 huggingface dataset:
Jack of All, Master of Some: Information Network and Innovation in Crowdsourcing Communities
Authors: Hwang Elina H. , Singh Param Vir , Argote Linda
Published: June 2019

In this paper, we examine information flow across two crowdsourcing communities and provide empirical evidence on how information obtained from a customer support crowdsourcing community can help individuals generate more novel, popular, and feasible ideas in an innovation crowdsourcing community. Our findings inform firms’ decisions about whether to simultaneously host customer support and innovation crowdsourcing communities. Companies such as Dell and BestBuy simultaneously host customer support and innovation crowdsourcing communities. Yet many other companies host only innovation crowdsourcing communities. Our findings suggest that hosting both communities has benefits because a customer support community offers idea generators an opportunity to accumulate current needs information as well as to activate means information from their memory. This needs-and-means information enables idea generators to create high-quality new product/service ideas. Our findings further suggest that those firms that are already hosting two crowdsourcing communities could benefit by tracing individuals’ activities more closely. By collecting data about individuals’ microlevel activities in a customer support community, companies would be able to identify those individuals who have a higher probability of creating better ideas. By mobilizing those individuals, companies can increase the quality of ideas they obtain from innovation crowdsourcing communities.
Forward-Looking Behavior in Mobile Data Consumption and Targeted Promotion Design: A Dynamic Structural Model
Authors: Xu Lizhen , Duan Jason A. , Hu Yu Jeffrey , Cheng Yuan , Zhu Yan
Published: June 2019

Are individual consumers forward looking in consuming mobile data volume every day, subject to a monthly quota limit? If so, how can mobile carriers easily identify these forward-looking users and design profitable promotions targeting these users? We discover distinct temporal usage patterns that can distinguish forward-looking users from myopic ones. An empirical test is constructed to test for individual forward-looking behavior and applied to a unique data set of individual mobile data users’ daily usage volume over multiple months. We find a considerable proportion of users (about 40%) are indeed forward looking and also find empirical evidence of individual consumer myopia. Our dynamic structural model enables sophisticated counterfactual simulations incorporating various factors (e.g., consumer anticipation, plan switch) to deliver rich implications for targeted promotion design. As we find, promotions targeting only forward-looking consumers could be significantly more profitable than blanket promotions uniformly applied to all. Properly designed end-of-month promotions targeting forward-looking users could help mobile carriers fully utilize the otherwise excess network bandwidth and increase revenue at little extra cost.
Explaining Digital Piracy: A Meta-Analysis
Authors: Eisend Martin
Published: June 2019

Why do users engage in digital piracy? The theoretical explanations are particularistic and the empirical findings are fragmented and divergent. Managers and academics have thus had little guidance on how to explain and combat digital piracy. To help fill this gap, the present paper provides a meta-analysis that synthesizes past research and identifies the key drivers of users’ engagement in digital piracy. The findings identify new measures and revise existing strategies to confront the global threat of digital piracy. Effective anti-piracy measures focus on breaking habits, reducing users’ control, suppressing justifications, and changing attitudes. Breaking habits requires technical control strategies such as impeding access to pirate sites, and should be accompanied by legislative demands. Impairing the attractiveness of pirate websites while providing high quality content on legitimate channels weakens illegal users’ perceived control. Enhanced features and functionality of legal products and websites that are easy accessible strengthens legal users’ perceived control. While many existing anti-piracy campaigns foster positive appeals (e.g., supporting the industry), describing the risks and loss of control seem more promising. As for targeting, psychographics provide a better portrait of pirating users than demographics—they appreciate sharing, are innovative, less risk averse, less susceptible to influence, and of lower integrity. Finally, making more legal copies available to users is discouraged.
Toward a Theory of Information Systems Security Behaviors of Organizational Employees: A Dialectical Process Perspective
Authors: Karjalainen Mari , Sarker Suprateek , Siponen Mikko
Published: June 2019

Practice-/policy-oriented abstract: Understanding why employees do or do not comply with information systems security (ISS) procedures is an imperative in today’s organizations whose futures often depend on how well they protect and harness information assets. We use a predominantly inductive approach to develop a theoretical understanding of how employees’ reasons for engaging to ISS behaviors (ISSBs) change over time, using ideas from dialectics as our scaffolding. Our dialectical view of this process suggests that explanations for engaging in different ISSBs change over time as individuals seek to balance contradictory demands. Furthermore, our view suggests that new experiences and external events initiate a process of reevaluating tensions that can in turn lead to behavioral changes. Based on our observations and interpretation, we conclude that it is beneficial for ISS practitioners not only to be aware of factors that seem to promote compliance with ISSPs, but also to pay attention to the importance of opposing values and pressures, triggers, and ways to resolve the existing tensions related to an individual’s ISSBs. This will likely enable awareness about the dilemmas that individuals confront in ISS-related situations and potentially contribute to the design of better controls and procedures for ensuring compliant ISSBs.
Choosing the right rectangular expander and maximising the benefits from expanded tissue
Authors: Durgun Mustafa , Aksam Ersin
Published: June 2019

Objective:

Tissue expanders are widely used in the reconstruction of tissue wounds. This study aims to demonstrate how to choose the correct size of rectangular expander in relation to wound size and the maximum advancement technique for wound coverage in order to achieve a successful outcome.

Methods:

The present study included patients who were operated on between January 2013 and January 2017. The expander height chosen was more than half the length of the wound and the expander width was chosen to be as wide as possible, based on the width of the wound. The expander was placed in a site adjacent to the wound. Maximum advancement method was used to achieve coverage of the wound.

Results:

A total of 19 patients were included in the study, mean age 17.5 (range: 11–25) years. Indication included burn scar (n=14) and congenital nevus (n=5). The tissue expander was inserted into the scalp in 17 patients and supraclavicular area in two patients. A successful wound repair was achieved with the planned flaps in all patients.

Conclusion:

In expansion using rectangular expanders, the required expanded skin is gained through the height of the expanded tissue. Thus, expander size should be preoperatively planned to ensure the height of expanded tissue would be, at least, half of the wound length. Maximum benefit will be achieved from the expanded tissue through the correct placement of expanded tissue lateral flaps.
Going back to collections: a study case of the Florentino Ameghino collection housed in the Museo de La Plata (Argentina)
Authors: Chichkoyan Karina Vanesa
Published: June 2019

The historical Florentino Ameghino collection housed in the Museo de La Plata (Argentina) joined the 19th century international discussion about human antiquity. The collection comprises bones with evidences of anthropic modification from alleged Tertiary beds associated with extinct animals. According to the Argentinean naturalist Florentino Ameghino, these evidences proved the early presence of humans in the South America’s Southern cone. This analysis rules out the proposed intentionality behind the anthropic traces. Instead, most of the materials were remains of broken bones for marrow extraction. The revision of these historical collections is therefore crucial for obtaining up-to-date information to advance in current researches as methodologies to study them had highly developed in the last century. In this sense, museum collections become an alternative and powerful firsthand tool that preserves our non-renewable record of the past.
The Black Protests: a Struggle for (Re)Definition of Intimate Citizenship.
Authors: Nawojski Radosław , Pluta Magdalena , Zielińska Katarzyna
Published: June 2019

Próby zmiany prawa regulującego dostęp do aborcji w Polsce, podjęte przez polski Sejm w 2016 i 2018, zainicjowały intensywną społeczną mobilizację i szerokie protesty społeczne, określane wspólną nazwą „Czarnych Protestów”. Tę mobilizację traktujemy jako próbę (prze)definiowania obowiązujących pojęć obywatelstwa, a w szczególności jako wyraz poszukiwania nowego modelu obywatelstwa intymnego, czyli publicznego przedefiniowania praw dotyczących prywatnej, intymnej sfery. Celem autorek artykułu jest analiza wspomnianych (re)artykulacji intymnego obywatelstwa. W pierwszej części tekstu autorki opisują, czym były Czarne Protesty oraz Ogólnopolski Strajk Kobiet, a także przybliżają kontekst ich powstania oraz postulaty. W drugiej części zdefiniowana zostaje kategoria obywatelstwa, a w szczególności obywatelstwa intymnego. Następnie przedstawiona zostaje metodologia badań. W ostatniej, analitycznej części artykułu autorki rekonstruują wizje obywatelstwa intymnego wyłaniające się z analizowanego materiału empirycznego.
Le secret de famille dans Non-dits et Mentir vrai de Gisèle Fournier
Authors: Bernard Isabelle
Published: June 2019

This article focuses on the theme of the family secret as literary genre, motif, and structure in the work of the contemporary French author Gisèle Fournier. Following a triaxle scheme, the article analyzes the particular polyphonic writing of the secret and the unspeakable, and explores the long psychological process of the victims as depicted in Fournier’s writings. In addition, the study situates Fournier’s oeuvre in the same tradition as two of the most prominent contemporary French authors, Marie NDiaye and Laurent Mauvignier.
Trials of Curiosity: Flaubert’s La Tentation de saint Antoine and Bouvard et Pécuchet
Authors: Buch Robert
Published: June 2019

Flaubert regarded his last two novels, La Tentation de saint Antoine and the unfinished Bouvard et Pécuchet, as companion pieces. For all their obvious differences in terms of setting and generic models, certain similarities have struck readers, not least the way in which both works depart from the parameters of the writer’s influential poetics. Among the most prominent similarities are an unmistakable and at times tiresome repetitiveness and the overwhelming encyclopedic scope of the scientific knowledge and disciplines informing both works. The essay charts the different generic lineages that make for the difficulty in situating Flaubert’s late work to then discuss a theme that is often overlooked: curiositas. Hans Blumenberg’s magisterial history of curiosity, Der Prozeß der theoretischen Neugierde, allows us to account for the peculiar mix of science and religion, gnostic and scientific curiosity, in La Tentation, while the philosopher’s short study Das Lachen der Thrakerin, an extension of the curiosity book, casts a new light on the ambivalent status of libido sciendi in Bouvard et Pécuchet.
Akustische Repräsentation und Polyphonie in Gryphius’ Carolus Stuardus
Authors: Previšić Mongelli Boris
Published: June 2019

Gryphius reworks the first version of his tragedy Carolus Stuardus. In doing so, he elucidates not only the parallels with the Passion of Christ but also the presentation of the human voices at the medial interface between description and song. Irregular rhythmic arrangements of character discourse and the independence of the choruses from the plot point to a multifaceted contrast polyphony that can be readily measured against contemporary musical models.
Radiation outcome in mechanical thrombectomy of acute ischemic stroke
Authors: Cai Xiaoying , Ding Xianhui , Wang Wenbin , Yang Ke , Zhou Zhiming , Fang Yannan , Shi XiaoLei
Published: June 2019

Objective

Mechanical thrombectomy is recommended for acute ischemic stroke (AIS) with large artery occlusion. Radiation during the endovascular procedure would increase the risk of skin diseases. We sought to identify radiation outcomes during mechanical thrombectomy.

Methodology

We prospectively collected and analyzed radiation parameters during mechanical thrombectomy in 41 patients affected with acute cerebral artery occlusion.

Results

There were 41 cases (68.73 ± 11.05 years) in this study, with a National Institute Health Stroke Scale (NIHSS) score of 15.66 ± 5.94. The time parameters were recorded as following: 84.45 ± 31.66 min (operation duration), 129.71 ± 81.14 s (angiographic run), 16.02 ± 11.03 min (fluoroscopy) and 18.19 ± 11.14 min (angiographic exposure). The doses produced in the procedure were: 1276.43 ± 1647.56 mGy (shot dose), 607.26 ± 412.34 mGy (fluoroscopy) and 1635.52 ± 593.65 mGy (angiographic exposure). Further analysis discovered no association between NIHSS and these time and radiation parameters (P > 0.05).

Conclusion

This study provided the description of radiation details during mechanical thrombectomy for acute cerebral artery occlusion. The stroke severity would not influence the procedure parameters.
New orientation of study on economic psychology and behaviour
Authors: You Yucong
Published: June 2019

Economic psychology refers to the impact of psychological factors on economic changes, and its outward manifestation is economic behaviour. Psychology, as a science studying human psychology and behaviour, has no reason to ignore the study of economic activities. This study summarizes the latest research results and conclusions of economic psychology from three aspects of behaviour level, body signal and other people’s movement or displacement. In addition, it expounds the reflection of economic psychology, the reflection of rational human hypothesis of traditional economics and the prospect of future research. From the perspective of economic psychology, it is of great significance to analyse the psychological motivation behind the conflicts and interests in the study of economic psychology and behaviour so as to construct the harmonious behaviour relationship of “psychological contract” on the basis of the rational mechanism of interest distribution.
Decision-making ability of professional managers based on neurocognitive
Authors: Liang Guo , Li Xiyuan
Published: June 2019

In order to explore the factors influencing managers' decision-making ability and the relationship among them, this study puts forward the hypothesis on the basis of analysing the factors influencing the decision-making ability, constructs a neurocognitive model of the factors influencing the decision-making ability, analyses and verifies the hypothesis with the neurocognitive model in combination with the questionnaires, and calculates the path coefficient through the model. The empirical results show that decision-making information, leadership authority and corporate culture have significant influence on the decision-making ability, in which leadership authority is the main factor, and governance structure and decision-making system indirectly influence the decision-making ability through other intermediaries.
Characteristics of cognitive in children with learning difficulties
Authors: Liang Feng , Li Panpan
Published: June 2019

In order to explore the relationship between cognitive function in children with learning difficulties and social environment, this study uses the Wechsler Intelligence Scale and the self-made general environment questionnaire to investigate 185 children with learning difficulties and compares them with 185 normal children, and gives attention test to 50 children with learning difficulties. The results show that family environment has a certain influence on the children with learning difficulties, they have a significantly lower verbal intelligence quotient (VIQ), performance intelligence quotient (PIQ) and full scale intelligence quotient (FIQ), and the separation of VIQ and P IQ is common among them. As the children with learning difficulties grow older, their ability for abstract generalization tends to decline, which may be a characteristic of their intelligence development. This study aims to compare the functional differences in cortical regions between children with learning difficulties and children without from the perspective of cognitive neuropsychology, so as to provide effective assistance for children with learning difficulties.
Zur Theorie und Typologie der Erfolgsmedien
Authors: Kärtner Jurit
Published: June 2019

Im Artikel wird die Theorie der Erfolgsmedien (Geld, Wahrheit etc.) weiterentwickelt und für dadurch mögliche Erkenntnisgewinne argumentiert. Mit Hilfe der basalen Unterscheidung von soziologischen Operationstheorien als Handlungs- oder Kommunikationstheorien (1.1) werden zunächst die klassischen Operationstheorien und Typologien der Erfolgsmedien (Parsons, Luhmann) dargestellt (1.2) und kritisiert (1.3). Darauf folgt die Entwicklung einer kommunikationstheoretisch basierten Medientheorie und -typologie (1.4), um deren heuristische Fruchtbarkeit dann an den Beispielen der Ökonomisierungsthese und der Soziologie der (Be)Wertung deutlich zu machen (1.5). Ordnungstheoretisch werden die zentralen Probleme und Teiltheorien der Medienschöpfung (durch Banken, Universitäten etc.), -zirkulation (von Geld, Publikationen etc.) und -speicherung (durch Eigentümer, Wissenschaftler etc.) samt der entsprechenden Krisen skizziert, wodurch das umfassende Potenzial der prinzipiell vergleichenden Theorie der Erfolgsmedien deutlich wird (2).
Gibt es eine Zunahme gleichgeschlechtlicher Partnerschaften in Deutschland? Theoretische Überlegungen und empirische Befunde
Authors: Lengerer Andrea , Bohr Jeanette
Published: June 2019

Obwohl gleichgeschlechtliche Partnerschaften einen enormen Zuwachs an gesellschaftlicher und rechtlicher Anerkennung erfahren haben, ist das empirisch gesicherte Wissen über ihre Verbreitung weiterhin gering. Der vorliegende Beitrag beschäftigt sich mit der Entwicklung gleichgeschlechtlicher Partnerschaften in Westdeutschland seit Beginn der 1970er-Jahre. Auf Basis des Mikrozensus werden gleichgeschlechtliche Partnerschaften im gemeinsamen Haushalt – teilweise mit Hilfe eines Schätzverfahrens – nicht nur im Zeitverlauf, sondern erstmals auch im Lebensverlauf von Kohorten betrachtet. Theoretisch wird argumentiert, dass die Wahl eines gleichgeschlechtlichen Partners nicht allein von der sexuellen Orientierung, sondern auch von sozialen und strukturellen Rahmenbedingungen abhängt. Die Ergebnisse zeigen, dass der Anteil gleichgeschlechtlicher Partnerschaften im Zeitverlauf kontinuierlich ansteigt. Dieser Anstieg ist auf einen Kohorteneffekt zurückzuführen und zeigt sich für beide Geschlechter, fällt bei Männern allerdings stärker aus.
Editorial
Authors: Robertt Pedro , Prates Camila , D'Avila Ana Paula , Silva Lucas , Lopes Pamela , Costa Luana , Teixeira Arielson
Published: June 2019

Editorial
Entre agronegócio e agroecologia: questões acerca da “transferência de tecnologia” em um grande programa de desenvolvimento
Authors: Camana Ângela , Almeida Jalcione
Published: June 2019

Fruto de um acordo entre Brasil, Japão e Moçambique, o Programa de Cooperação Triangular para o Desenvolvimento Agrícola da Savana Tropical em Moçambique (ProSAVANA) prevê ações “de desenvolvimento” em uma área com mais de 14 milhões de hectares, situada ao norte do país africano. Diante da escassez de informações e falta de transparência, o ProSAVANA tem sofrido severas críticas, envolvendo denúncias de usurpação de terras em prol do agronegócio internacional e a violação de direitos. Articuladas com associações brasileiras e japonesas, organizações moçambicanas têm se manifestado contra o programa e tornado público seu descontentamento com o modelo de desenvolvimento escolhido. Dentre as contrapropostas está a defesa da agroecologia, ideia e prática que estão longe do escopo do Programa. Assim, este texto tem como tema os atravessamentos entre o desenvolvimento e seus modelos produtivos em um contexto de conflito, assumindo como objeto as redes que produzem, sustentam e expressam o ProSAVANA em torno à questão da “transferência de técnicas/tecnologias”. O objetivo é discutir uma pressuposta posição ambígua do Brasil – e dos modelos técnicos por ele ofertados – diante deste programa de desenvolvimento que é apresentado no âmbito da “cooperação Sul-Sul”. A reflexão, que deriva de uma pesquisa em curso, é influenciada pelo referencial teórico da socioantropologia do desenvolvimento e dos Estudos Sociais de Ciência e Tecnologia (ESCT), enquanto o percurso metodológico é inspirado em etnografias de projetos de desenvolvimento. O trabalho de campo foi realizado em Moçambique de janeiro a abril de 2018 e de fevereiro a março de 2017. Considerações preliminares indicam que a ideia de “transferência de técnicas/tecnologias” no ProSAVANA – expressas no agronegócio e na agroecologia – se rearranja quando de sua “exportação”.
Inovacijska izvedba zemalja članica Europske unije
Authors: Vlatka Bilas , Bošnjak Mile , Novak Ivan
Published: June 2019

Cilj ovoga rada je prikazati rezultate inovacijske izvedbe zemalja članica Europske unije. Najsveobuhvatniji uvid u inovacijsku izvedbu zemalja daju Globalni indeks inovacija, Bloombergov indeks inovacija i Europska ljestvica uspjeha u inovacijama. Navedeni indeksi imaju različite metodologije izračuna inovacijske izvedbe zemalja, a ovisno o vrsti indeksa i metodologiji zemlje ostvaruju različite rezultate. Komparativna analiza indeksa inovacija pokazala je da su, ovisno o vrsti indeksa i metodologiji izračuna, vodeće zemlje svijeta Švicarska i Južna Koreja, a najinovativnije zemlje članice Europske unije Švedska i Nizozemska. Unatoč tome, prema sva tri indeksa i metodologije, neke zemlje članice Europske unije pokazuju slabu inovacijsku izvedbu, poput Hrvatske, Bugarske i Rumunjske. Komparativna analiza predmetnih indeksa upućuje na najslabije karike ekonomije koje je nužno jačati kako bi se poboljšala razina inovativnosti, a posljedično i konkurentnost, zbog čega su navedeni rezultati smjernice vođenja te definiranja ciljeva, prioriteta i mjera inovacijskih politika.
Analiza troškova i koristi izgradnje autoceste A1
Authors: Rupčić Nataša , Gašparović Tomislav
Published: June 2019

Odluke u javnim poduzećima ne donose se isključivo na temelju kriterija profitabilnosti, već je riječ o objedinjavanju kriterija tržišnosti i javnosti. Unatoč raznolikosti ciljeva koje projektima u javnom sektoru treba zadovoljiti te činjenici da se odluke donose političkim procesom pregovaranja između dionika, podloga donošenju odluka treba biti analiza troškova i koristi. Pri tome treba uključiti sve koristi: materijalne i nematerijalne, izravne i posredne. Valja imati na umu da projekt treba biti troškovno pokriven kako u fazi izgradnje, tako i u fazi korištenja i održavanja. U ovome radu analiziraju se odluke u javnom poduzeću HAC s naglaskom na upravljačke odluke pri izgradnji autoceste A1. Ciljevi izgradnje ove autoceste bili su povezivanje državnoga prostora, povezivanje s europskom mrežom autocesta, razvoj turizma te povećanje sigurnosti prometa. Ti su ciljevi ostvareni. No nisu ostvareni željeni ciljevi povećanja razvoja, posebno gospodarskoga razvoja ruralnih i slabije naseljenih područja te zadržavanja i povećanja broja stanovnika. Tržišni ciljevi projekta također nisu ostvareni. Troškovi izgradnje dionice od Bosiljeva do Splita premašili su planirane troškove za 3 milijarde kuna. Prihodi su od 2015. do 2017. godine bili u prosjeku 500 milijuna kuna manji od projiciranih. Na temelju ovih podataka nameće se pitanje je li autocestu A1 trebalo graditi s pomoću kredita ili putem javno-privatnog partnerstva. S obzirom na pogreške u projekcijama, može se pretpostaviti da bi model javno-privatnog partnerstva podrazumijevao realniju procjenu prometne dinamike, nižu cijenu gradnje, bolje upravljanje prihodima, ali i postupniju gradnju.
Los videojuegos en el proceso de aprendizaje de los niños de preescolar
Authors: Córdoba Castrillón Mónica María , Ospina Moreno Javier
Published: June 2019

El uso de herramientas tecnológicas como apoyo en los procesos de enseñanza-aprendizaje de los niños de preescolar no debe visualizarse de forma negativa, todo lo contrario, para algunos autores el uso de software como juegos digitales o videojuegos, utilizados de forma moderada y adecuada resulta una estrategia positiva en el aprendizaje significativo de los niños. El objetivo general de la investigación es determinar la influencia de los juegos y los videojuegos en los procesos formativos de los estudiantes del nivel preescolar; y como objetivos específicos se definieron: conocer la relación juego-desarrollo cognitivo en los niños a través de los videojuegos o juegos digitales, indagar sobre la influencia de los videojuegos o juegos digitales en el proceso de enseñanza para los estudiantes del nivel preescolar, diseñar una herramienta tecnológica para propiciar una mejor relación juego-desarrollo cognitivo en el proceso de aprendizaje de los estudiantes del nivel preescolar. La orientación del diseño metodológico de la investigación corresponde a un estudio descriptivo-cuantitativo, no experimental, con toma de datos longitudinal; se seleccionó una población de 41 instituciones educativas públicas del municipio de Bello las cuales tienen nivel de preescolar. Se utilizaron dos tipos de instrumentos para la recolección de la información, la encuesta estructurada para recolectar información de los maestros de preescolar y entrevista a especialistas infantiles como pedagogos y psicólogos. Los resultados de este estudio permiten evidenciar, hacer uso de este tipo de herramientas tecnológicas de forma moderada y adecuada puede convertirse en un factor positivo en el proceso de aprendizaje de los niños de preescolar.
Hacia los senderos de una evaluación transformadora: expresión del conocimiento contextual, la integración de la dimensión temporal y las posibilidades de mejores aprendizajes
Authors: Fernández Castañeda Eduardo , Gordo Colorado Claudia Yamile , López Pava John Jairo , Rodríguez Andrea Lizeth
Published: June 2019

Este artículo presenta una reflexión pedagógica en torno a factores que inciden en la resignificación de la evaluación en el aula y la posibilidad de fortalecer los aprendizajes en los estudiantes de básica de la Institución Educativa Fagua del municipio de Chía (Cundinamarca). En los primeros apartados se realizó un análisis de la pertinencia del saber científico para fortalecer los aprendizajes, aspectos concernientes al conocimiento contextual y a continuación, consideraciones en torno al tiempo como dimensión que permea el desarrollo y el aprendizaje, especialmente al paso de hombre a partir de consideraciones pedagógicas, el cual denominaremos histórico; algunas problemáticas que llamaremos supuestos, concernientes al aprendizaje en el contexto social de la institución educativa y las posibles variables de desarrollo desde una visión constructivista y socio - cultural que podrían fortalecer su comprensión en la búsqueda de una evaluación transformadora. De estos análisis se deriva el devenir e implementación de la investigación para una nueva mirada interpretativa de la evaluación en el aula.
Concepciones de padres, profesores y estudiantes, sobre la escuela como escenario de paz
Authors: Pedraza Alexandra , Cabrera Yaguana Mireya Beatriz , Ángel Florez Aleyda , Leal Velasquez Myriam Andrea
Published: June 2019

En el marco de una época de reflexión sobre la construcción de paz desde los escenarios educativos, se hace indispensable la participación de la escuela como principal escenario de socialización y formación para la paz. El presente artículo pretende mostrar los resultados obtenidos en una investigación sobre las concepciones que, respecto a la escuela como escenario de paz, poseen los padres de familia, profesores y estudiantes de básica secundaria de tres instituciones educativas; dos de ellas ubicadas en Colombia, y la otra en Ecuador. Dicha investigación se adelantó desde el enfoque cualitativo, con el objetivo de describir las concepciones de 72 participantes. Los datos fueron recolectados a través de entrevista semiestructurada, validada por expertos; y analizados por medio de codificación y categorización de la información. Se encontró gran afinidad en los resultados de las tres instituciones educativas, en categorías como: paz, familia, convivencia y resolución de conflictos.
Q & A with Daniel L. Hartl, Recipient of the 2019 Thomas Hunt Morgan Medal
Authors: L. Hartl Daniel
Published: June 2019

The Genetics Society of America’s Thomas Hunt Morgan Medal honors researchers for lifetime achievement in genetics. The recipient of the 2019 Morgan Medal is Daniel Hartl of Harvard University, who is recognized for his influential and diverse contributions to genetics research. The unifying theme of Hartl’s broad impacts on transmission, population, evolutionary, and medical genetics has been the combination of theoretical insights with cutting-edge experimental techniques. Some of his contributions include revealing the genetics of segregation distortion, developing statistical frameworks for estimating the effects of selection, application of these frameworks to natural and experimental populations, discovery of the mariner transposon and its influence on genome evolution, insights into the evolution of gene expression differences, and modeling the evolution of malaria parasite populations. Hartl is also known as a supportive mentor who has trained many prominent geneticists that continue to shape the field.
Short-term clinical outcomes in patients with acute myocardial infarction after successful percutaneous coronary revascularization: the role of promoter polymorphism of the endothelial nitric oxide synthase gene
Authors: Petyunina Olga V. , Kopytsya Mykola P. , Babichev Denis P. , Berezin Alexander E.
Published: June 2019

Background: The purpose of this study was to investigate the associations between variants of a promoter polymorphism of the endothelial nitric oxide synthase (eNOS) gene and clinical outcomes in acute ST-segment elevation myocardial infarction (STEMI) patients after a successful primary percutaneous coronary artery intervention (PCI).

Methods: 177 patients with acute STEMI, 82 patients with angiographically proven stable coronary artery disease, and healthy volunteers were included in the study. The primary end-point was a combined event (follow-up major adverse cardiac events –MACEs and hospitalization) that occurred within 6-month of the discharge from the hospital.

Results: The combined end-point was determined in 72 patients from the entire acute STEMI population (40.6%), including 24 events for 786TT genotype, 23 events for 786TC genotype and 25 events for 786CC genotype. Kaplan-Meier curves demonstrated that acute STEMI patients with 786CC eNOs genotype had lower MACEs free accumulation when compared to those with 786TC and 786TT eNOs genotypes at 6-month follow up period (Log-rank p < 0.001). Multivariate Cox regression analyses identified 786CC in eNOs gene as an independent predictor of clinical outcomes in STEMI after PCI.

Conclusions: the 786CC polymorphism in eNOs gene is an independent predictor for clinical outcomes after a successful primary PCI in acute STEMI.
A Prediction Model to Identify Febrile Infants ≤60 Days at Low Risk of Invasive Bacterial Infection
Authors: Aronson Paul L. , Shabanova Veronika , Shapiro Eugene D. , Wang Marie E. , Nigrovic Lise E. , Pruitt Christopher M. , DePorre Adrienne G. , Leazer Rianna C. , Desai Sanyukta , Sartori Laura F. , Marble Richard D. , Rooholamini Sahar N. , McCulloh Russell J. , Woll Christopher , Balamuth Fran , Alpern Elizabeth R. , Shah Samir S. , Williams Derek J. , Browning Whitney L. , Shah Nipam , Neuman Mark I. ,   for the Febrile Young Infant Research Collaborative
Published: June 2019

OBJECTIVES:

To derive and internally validate a prediction model for the identification of febrile infants ≤60 days old at low probability of invasive bacterial infection (IBI).

METHODS:

We conducted a case-control study of febrile infants ≤60 days old who presented to the emergency departments of 11 hospitals between July 1, 2011 and June 30, 2016. Infants with IBI, defined by growth of a pathogen in blood (bacteremia) and/or cerebrospinal fluid (bacterial meningitis), were matched by hospital and date of visit to 2 control patients without IBI. Ill-appearing infants and those with complex chronic conditions were excluded. Predictors of IBI were identified with multiple logistic regression and internally validated with 10-fold cross-validation, and an IBI score was calculated.

RESULTS:

We included 181 infants with IBI (155 [85.6%] with bacteremia without meningitis and 26 [14.4%] with bacterial meningitis) and 362 control patients. Twenty-three infants with IBI (12.7%) and 138 control patients (38.1%) had fever by history only. Four predictors of IBI were identified (area under the curve 0.83 [95% confidence interval (CI): 0.79–0.86]) and incorporated into an IBI score: age <21 days (1 point), highest temperature recorded in the emergency department 38.0–38.4°C (2 points) or ≥38.5°C (4 points), absolute neutrophil count ≥5185 cells per μL (2 points), and abnormal urinalysis results (3 points). The sensitivity and specificity of a score ≥2 were 98.8% (95% CI: 95.7%–99.9%) and 31.3% (95% CI: 26.3%–36.6%), respectively. All 26 infants with meningitis had scores ≥2.

CONCLUSIONS:

Infants ≤60 days old with fever by history only, a normal urinalysis result, and an absolute neutrophil count <5185 cells per μL have a low probability of IBI.
Uso de biofertilizantes en el desarrollo vegetativo y productivo de plantas de camu-camu en Ucayali, Perú
Authors: Abanto-Rodríguez Carlos , Mori Gerson Manuel Soregui , Panduro Mario Herman Pinedo , Castro Ena Vilma Velazco , Dávila Elvis Javier Paredes , Oliveira Eduardo Medeiros de
Published: June 2019

RESUMEN Para aumentar la calidad y el rendimiento de frutos en plantaciones de camu-camu, actualmente se viene buscando alternativas de producción orgánica. En ese sentido, el presente trabajo tuvo por objetivo determinar el efecto de diferentes biofertilizantes en el desarrollo vegetativo y productivo de plantas de camu-camu. Para ello, fue conducido un experimento mediante un diseño de bloques completamente al azar (DBCA) en esquema factorial (5Bx5C), con cuatro repeticiones y una planta por unida experimental. El primer factor (B) estuvo constituido por 5 tipos de biofertilizantes: B1) vacaza (estiércol de vaca), B2) gallinaza (estiércol de gallina de postura), B3) guano de isla (estiércol de aves de mar), B4) pollinaza (estiércol de pollo) y B5) sedimentos de rio, y el segundo factor (C) por cinco concentraciones de biofertilizante: C1) 0, C2) 2, C3) 4, C4) 6 y C5) 8%. Después de 210 días, fue verificado que, el biofertilizante guano de isla estimuló mayor emisión de brotes nuevos (1773,73) y el biofertilizante vacaza presentó los mejores resultados de botones florales, número de frutos de cosecha y rendimiento de frutos (t ha-1) con 4611,67; 2926,85 y 28,8 en las dosis 6; 8 y 8%, respectivamente. Se concluye que, el biofertilizante vacaza (VA) incrementó la calidad y el rendimiento de frutos de camu-camu en suelos de restinga. Así también, el biofertilizante guano de isla (GI) fue el segundo en presentar los mejores resultados, sin embargo, el alto contenido de N retardó el desarrollo normal de las fases fenológicas.
Sensoriamento remoto multiespectral na identificação e mapeamento das variáveis bióticas e abióticas do cafeeiro
Authors: Marin Diego Bedin , Alves Marcelo de Carvalho , Pozza Edson Ampélio , Gandia Rômulo Marçal , Cortez Matheus Luiz Jorge , Mattioli Matheus Campos
Published: June 2019

RESUMO O sensoriamento remoto multiespectral apresenta-se como metodologia confiável e viável para auxiliar o produtor na decisão para melhores práticas de manejo, garantindo uma produção agrícola mais eficiente e sustentável. Objetivou-se, com este trabalho, identificar e mapear o estresse em lavoura cafeeira, causado por variáveis bióticas e abióticas, por meio de índices de vegetação derivados de imagens multiespectrais Landsat-5 Thematic Mapper (TM). A malha amostral foi composta por 67 pontos, sendo cada ponto amostral constituído por cinco plantas. As análises de incidência de cercosporiose e de infestação do bicho-mineiro, nas folhas, de pH, matéria orgânica e textura do solo e teores foliares de nutrientes foram realizadas em cada um dos pontos amostrais e correlacionadas com 16 índices de vegetação obtidos de imagens referentes à época das análises. Os índices de vegetação apresentaram distribuição espacial semelhante à distribuição espacial das variáveis agronômicas, na lavoura. Houve correlação positiva dos índices com a infestação do bicho-mineiro e com os teores de silte e argila no solo e concentrações de Mg, Cu, B e Mn nas folhas, e negativa, com a incidência de cercosporiose e com pH e teor de areia do solo. Com base nesses resultados, foi possível mapear e identificar as alterações na reflectância espectral dos cafeeiros, causadas por essas variáveis agronômicas.
Síntese e avaliação de nanopartículas de sílica mesoporosas na liberação controlada de feromônios repelentes de abelha
Authors: Zanoni E. T. , Savi G. D. , Valadares M. F. , Angioletto E.
Published: June 2019

Resumo Neste estudo foi avaliado o armazenamento e liberação de feromônios repelentes de abelhas em uma nanoestrutura de sílica mesoporosa. O nanomaterial foi sintetizado via método sol-gel e caracterizado por microscopia eletrônica de transmissão, espectroscopia de infravermelho e método BET. As nanopartículas mesoporosas apresentaram-se com área superficial de 1084 m2/g exercendo a função desejada para a proposta do estudo. Os feromônios foram carregados nos percentuais de 10%, 20% e 40% e a efetividade dos carregamentos foi analisada por termogravimetria. Em seguida foi avaliado o comportamento de liberação do nanossistema, sendo possível observar que as nanopartículas influenciaram de forma significativa no perfil de liberação dos feromônios, retardando a sua taxa de liberação. Dos ensaios de avaliação do comportamento de liberação concluiu-se que as nanopartículas mesoporosas prolongaram a atividade de liberação dos feromônios permanecendo com essa função por vários dias.
Synthesis and characterization of asphalt composite precursors using amorphous rice husk silica
Authors: Sembiring S. , Situmeang R. , Sembiring Z.
Published: June 2019

Abstract In this research, asphalt composites were produced by mixing asphalt with silica extracted from rice husk, with a ratio of asphalt to silica of 1:0, 1:1.7 and 1:2, and calcined at 150 °C. Development of structures was characterized using Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), scanning electron microscopy (SEM), followed by differential thermal analysis (DTA/TGA). The FTIR results showed the presence of Si-OH, C=O, and C-H functional groups, which were associated with asphaltene, carbon, and silica, according to the XRD analysis. The results obtained also indicated the significant effect of rice husk silica addition on phase transformation of asphaltene into silica and carbon, while asphaltene molecules were practically undetected. The presence of silica and carbon resulted in increased decomposition temperature of the sample. Based on these characteristics, the samples were considered as a roof material, suggesting their potential use as a substitute for lightweight steel roof devices.
Resistência de aderência de revestimentos de argamassa - contribuição por meio de mapeamento e revisão sistemática de literatura para futuras pesquisas no tema
Authors: Vaz F. H. B. , Carasek H.
Published: June 2019

Resumo A resistência de aderência é uma das principais propriedades dos revestimentos de argamassa e é bastante estudada pelo meio científico. Essa propriedade tem uma gama de intervenientes que são normalmente tratados de maneira isolada nos trabalhos científicos. O presente trabalho visou contribuir com o domínio e relações da propriedade resistência de aderência, compilando e classificando trabalhos da literatura pelas variáveis utilizadas em seus estudos, servindo como embasamento para nortear futuras pesquisas. Para tanto, foi realizada uma revisão sistemática da literatura reunindo análises e comparações entre estudos (artigos) nacionais e internacionais que abordaram essa propriedade e seus fatores intervenientes. Um resultado interessante foi a compilação das performances dos aditivos e adições, em termos de variações médias, na resistência de aderência bem como correlações matemáticas com outras propriedades dos revestimentos.
Factorial design applied to sodium activation of a Brazilian bentonite
Authors: Rosário J. A. do , Miguel R. F. , Rosário D. A. do , Kuhnen N. C. , Riella H. G.
Published: June 2019

Abstract Sodium bentonites are extensively used in industry because they have specific properties that are wanted for several purposes, such as high swelling, thixotropy, and cation exchange capacity. Otherwise, calcium and polycationic bentonites, which are predominant in Brazil, need to be chemically treated by sodium activation to expand their content of interlayer exchangeable sodium cations, which increases these properties. The present study shows the factorial design of the sodium activation for a polycationic bentonite from Quatro Barras, Paraná. The factors considered in the study were: reagent (NaOH and Na2CO3), concentration (1% and 5%) and contact time (24 and 72 h). The response variables were swelling and cation exchange capacity. Statistical analysis indicated significant effects of all factors over swelling and response surface methodology indicated optimal activation with sodium carbonate at 5% for 24 h.
Chemical characterization of archaeological pottery of the Lower Paraná River
Authors: Loponte D. , Morales J. , Gogichaishvili A. , Acosta A.
Published: June 2019

Abstract This paper analyzed the chemical composition of archaeological pottery produced by hunter-gatherers and horticulturist populations of the late Holocene of the lower Paraná basin. An energy dispersive X-ray fluorescence spectrometer was used to analyze the chemical composition of the sherds. The results obtained indicated that the analyzed samples, within certain parameters, showed some variability. The differences were even more significant when comparing the chemical composition of the pottery of the hunter-gatherer groups and that of the horticulturists. The main components identified in the archaeological pottery were grouped primarily with the location of production, that is, they were the result of local manufacturing. Within the trace-elements, the greatest variations in composition were observed in the strontium, which was assumed to vary in concentration levels throughout the region.
Influence of Ca2+ in the rheological properties and filtration of bentonitic clay dispersions in aqueous drilling fluids
Authors: Silva I. A. , Silva D. S. , Buriti B. M. A. B. , Menezes R. R. , Neves G. A. , Ferreira H. C.
Published: June 2019

Abstract The physicochemical characteristics of cations may be able to modify the rheological properties of bentonite clays, such as their loads, exchangeable cation sizes adsorbed on clay minerals, hydration behaviors and different intercalations with the bentonite structural layer effect of the cations present on the rheology of dispersions of bentonite clays. In this way, the objective was to study the influence of Ca2+ on the rheological and filtration properties of dispersions of new occurrences of bentonite clays from the State of Paraíba, Brazil, in aqueous drilling fluids. Four bentonite clays were selected, being characterized chemically, physically and mineralogically. Sodium carbonate was then added to the clays, and the rheological and filtration behavior of their dispersions were studied. The results showed the direct influence of the Ca2+ present and its implications, resulting from physicochemical interactions, on the rheological and filtration properties of dispersions of bentonite clays.
Diet and resource sharing by two Pimelodidae species in a Southeastern Brazilian reservoir
Authors: Silva Zoraia , Nascimento Patrícia Elaine Cunha do , Vitule Jean Ricardo Simões , Frehse Fabrício de Andrade , Ferraz Mayara Silva Oliveira , Mourgués-Schurter Lea Rosa
Published: June 2019

Abstract: Fish can vary their diet and feeding dynamics according to biotic and abiotic factors. There is insufficient knowledge regarding these factors in reservoirs, which limits the management of these areas. The aim of this study was to determine the diet of two related and most collected fish species, verify the influence of biotic and abiotic factors on their diet, and also verify the existence of resource sharing by them in an upstream Brazilian reservoir. Fish abundance in the reservoir was calculated and data were provided by 176 specimens of Iheringichthys labrosus (Lütken, 1874) and 255 specimens of Pimelodus maculatus Lacépède, 1803 collected in Camargos reservoir, MG, Brazil. Stomach contents were analysed through the frequency of occurrence and volumetric methods. PERMANOVA analysis was done to evaluate the influence of biotic (Species and Size class) and abiotic factors (Season and Site) on the diets. The Alimentary Index (AI) and feeding overlap Index (Pianka) were also estimated. A NMDS analysis was conducted to visualize the food categories responsible for interspecific difference. The ingested items were grouped into 18 categories, of which 17 were found in both species. Feeding resources were significantly related to the biotic (Species: Pseudo F = 2.583, P = 0.001; Size Class: Pseudo F = 1.646, P = 0.001) and abiotic (Season: Pseudo F = 2.458, P = 0.006) factors. I. labrosus showed an invertivorous diet while P. maculatus an omnivorous diet and both species were not exclusively benthophagus as typically reported. Food overlap occurred intraspecifically and interspecifically (Pianka 0.61 to 0.97 and 0.61 to 0.66, respectively) and overlap also occurred in three of the four analysed seasons (Pianka 0.66 to 0.91). The diet overlap found between two of the most fished species and the low fish productivity may indicate the limitation of resources in this reservoir and should be considered for management of this area.
Estudo da técnica de venografia dos dígitos de vacas
Authors: Loureiro M.G. , Silva J.R.B. , Rodrigues M. , Rafael L.A. , Vulcano L.C. , Hussni C.A. , Alves A.L.G. , Watanabe M.J. , Rodrigues C.A.
Published: June 2019

RESUMO O objetivo deste estudo foi descrever a técnica de venografia retrógrada podal em vacas, comparando os acessos da veia digital dorsal comum III com a digital comum II ou IV, nos membros torácicos e pélvicos, mediante a administração de dois diferentes volumes de contraste. Foram utilizados 53 membros torácicos e pélvicos de 14 vacas, com o torniquete de borracha posicionado a 5cm proximal aosparadígitos. Administraram-se 10mL do diatrizoato de meglumina em 24 membros (grupo 1), sendo 13 na veia digital dorsal comum III pelo acesso 1 (A1) e 11 na digital II ou IV no acesso 2 (A2). No grupo 2, administraram-se 20mL em 29 membros, sendo 15 pelo A1 e 19 pelo A2. Após a administração do contraste, as radiografias foram repetidas a cada 20 segundos até 120 segundos. O grau de preenchimento vascular foi maior no grupo 2, não diferindo entre membros e acessos venosos. Conclui-se que a administração de 20mL de contraste apresentou melhor preenchimento vascular e radiopacidade, não havendo diferença entre 20 e 120 segundos após a administração do contraste na qualidade radiográfica, independentemente do acesso venoso.