bluuebunny/crossref_metadata_2025 huggingface dataset:
CORPO-SUJEITO-DISCURSO: REFLEXÕES INICIAIS
Authors: Jordão Aline Bedin
Published: May 2019

O presente artigo, inscrito nos pressupostos teóricos da Análise de Discurso, traz à baila algumas reflexões sobre as relações entre sujeito, corpo e discurso. Propõe-se uma discussão acerca do corpo enquanto materialidade discursiva e objeto simbólico, configurando-se como uma superfície de inscrição que dá a ver o que é da ordem do sujeito e dos atravessamentos do exterior que o constitui, em especial no que tange ao indizível e ao inominável. Aponta-se para a relevância de considerar os efeitos das condições de produção contemporâneas nos discursos do/sobre o corpo, bem como sobre o lugar da imagem do corpo e ao que ela comumente se encarrega. Exemplos disso são a suspensão da exposição “Queermuseu” e as manifestações de sofrimento psíquico em relevo na atualidade, como as automutilações. Afirmando as possibilidades de os sentidos desdobrarem-se e deslizarem através do corpo, afirma-se a importância de problematizar o que o corpo e sua imagem põem em cena em seu estatuto discursivo.  Abstract:  This article, enrolled in the theoretical assumptions of Discourse Analysis, brings to light some reflections about the relations between subject, body and discourse. The discussion here proposed it is about the body as a discursive materiality and symbolic object, configuring and setting itself as a surface of inscription that shows what it belongs in the order of the subject and the crossings of the exterior that constitutes it, especially in regard to the unspeakable and the nameless. The relevance of considering the effects of contemporary production conditions on the discourses of the body as well as on the place of the image of the body and what it is commonly handled is pointed out. Examples of this are the suspension of the exhibition "Queermuseu" and the manifestations of psychic suffering in the present day, such as self-mutilation.  Affirming the possibilities of the senses unfolding and sliding through the body, one affirms the importance of problematizing what the body and its image put into the scene in its discursive status.
Synthesis of aryl cyclopropyl sulfides through copper-promoted S-cyclopropylation of thiophenols using cyclopropylboronic acid
Authors: Benoit Emeline , Fnaiche Ahmed , Gagnon Alexandre
Published: May 2019

The copper-promoted S-cyclopropylation of thiophenols using cyclopropylboronic acid is reported. The procedure operates under simple conditions to afford the corresponding aryl cyclopropyl sulfides in moderate to excellent yields. The reaction tolerates substitution in ortho-, meta- and para-substitution as well as electron-donating and electron-withdrawing groups. The S-cyclopropylation of a thiophenol was also accomplished using potassium cyclopropyl trifluoroborate.
AN AIRSPACE ANALYSIS ACCORDING TO AREA NAVIGATION REQUIREMENTS
Authors: Ostroumov Ivan , Kuzmenko Nataliia , Kharchenko Volodymur
Published: May 2019

Aircraft navigation within controlled airspace is carried out using on-board positioning systems capable to determine the coordinates of aircraft location with the system performance that meet navigation specifications requirements. The article proposes a descriptive set theory use to navigational aids network analysis in order to determine the positioning performance of the navigation system at predefined airspace volume. The uniqueness of the study is shape evaluation of areas that correspond to navigation specifications requirements and area research of different positioning techniques based on navigational aids such as DME/DME, VOR/DME, and VOR/VOR. An analysis of Ukrainian airspace has been done as an example.
THE CREATIVE INDUSTRY AS A FACTOR IN THE DEVELOPMENT OF THE ECONOMY: DISSEMINATION OF EUROPEAN EXPERIENCE IN THE COUNTRIES WITH ECONOMIES IN TRANSITION
Authors: Bilan Yuriy , Kryklii Olena , Vasilyeva Tetyana , Shilimbetova Gulbarshyn
Published: May 2019

The purpose of this article is to determine the possibility of using the experience of European countries in the development of the creative industry as a driving force for economic growth for the economies in transition. The authors studied the concept of the creative industry, existing models of classification of sub-sectors of the creative economy. The article analyses data on the world trends in the development of the creative industry and features of these processes in the economies in transition. Based on the results obtained, the key triggers that should be influenced by government regulation in economies in transition are: ensuring access to finance, ensuring an effective system of education at all levels to ensure the availability of skilled labour and literacy consumers of creative products, availability of high-quality infrastructure and regulatory system. Proceeding from this, recommendations for the development of creative industry in the economies in transition structured in terms of the key stakeholders: government, local government (regions and cities), higher educational institutions, creative industry, and other business representatives.
A DECISION SUPPORT SYSTEM FOR MULTI-CRITERIA ASSESSMENT OF LARGE BUILDING STOCKS
Authors: Carbonari Alessandro , Di Giuda Giuseppe Martino , Ridolfi Luigi , Villa Valentina , Corneli Alessandra
Published: May 2019

Both public administrations and private owners of large building stocks need to work out plans for the management of their property, while having to deal with yearly budget limitations. Particularly for the former, this is a rather critical challenge, since public administrations are given the responsibility of sticking to very strict budget distributions over the years. As a consequence, when planning the actions to be taken on their building stocks in order to comply with their current use and the legislation in-force, they need to classify refurbishment priorities. The aim of this paper is to develop a first tool based on Bayesian Networks that offers an effective decision support service for owners even in case some information is incomplete. This tool can be used to evaluate the compliance of existing buildings with the latest standards. The decision support platform proposed includes a multi-criteria evaluation approach combining several performance indicators, each of which related to a specific regulatory area. This tool can be applied to existing buildings, where the building with the lowest score shows the highest priority of intervention. Also, the platform performs an assessment of expected costs for required refurbishment or renovation actions.
MODELLING AND SIMULATION IN BUSINESS, ECONOMICS AND MANAGEMENT
Authors: León-Castro Ernesto , Merigó Jose M. , Avilés-Ochoa Ezequiel , Gil-Lafuent Anna M. , Herrera-Viedma Enrique
Published: May 2019

Modelling and Simulation in Business, Economics and Management. Technological and Economic Development of Economy, 25(4), pp. 571-575.
A NEW MEASURE OF VOLATILITY USING INDUCED HEAVY MOVING AVERAGES
Authors: León-Castro Ernesto , Espinoza-Audelo Luis Fernando , Aviles-Ochoa Ezequiel , Merigó Jose M. , Kacprzyk Janusz
Published: May 2019

The volatility is a dispersion technique widely used in statistics and economics. This paper presents a new way to calculate volatility by using different extensions of the ordered weighted average (OWA) operator. This approach is called the induced heavy ordered weighted moving average (IHOWMA) volatility. The main advantage of this operator is that the classical volatility formula only takes into account the standard deviation and the average, while with this formulation it is possible to aggregate information according to the decision maker knowledge, expectations and attitude about the future. Some particular cases are also presented when the aggregation information process is applied only on the standard deviation or on the average. An example in three different exchange rates for 2016 are presented, these are for: USD/MXN, EUR/MXN and EUR/USD
BOARD OF DIRECTOR’S GENDER DIVERSITY AND ITS IMPACT ON EARNINGS MANAGEMENT: AN EMPIRICAL ANALYSIS FOR SELECT EUROPEAN FIRMS
Authors: Saona Paolo , Muro Laura , San Martín Pablo , Baier-Fuentes Hugo
Published: May 2019

From a corporate governance point of view, this paper addresses the question about how board gender diversity influences managerial opportunistic behavior for solving agency conflicts from a sample of European countries. Specifically, we analyzed indexed non-financial companies from Denmark, Finland, France, Germany, Italy, Norway, Portugal, Spain, Sweden, and United Kingdom for the period 2006–2016. Several panel data techniques are used in the empirical analysis to deal with the endogeneity and heterogeneity problems. To the best of our knowledge our research is novel in the literature by providing a multi-country approach in board gender diversity, as well as considering contextual country variables and the role of the regulatory system as determinants of earnings management. Our results confirm the benefits of having a balanced board in terms of gender diversity. An equilibrated board tends to mitigate earnings management practices, reinforcing the value of the laws passed in recent decades in Europe. Our analysis reveals that the regulatory framework regarding board gender diversity established by each country has a determinant role in reaching equality in decision-making positions, as a founding value of the European Union. We provide several policy recommendations from our main findings
Annotated nomenclator of extant and fossil taxa of the Paludomidae (Caenogastropoda, Cerithioidea)
Authors: Neiber Marco T. , Glaubrecht Matthias
Published: May 2019

This nomenclator provides bibliographic details on all names in the family-, genus-, and species-group of the the family Paludomidae. All nomenclaturally available names are discussed including junior homonyms and objective junior synonyms as well as unavailable names such as nomina nuda, infrasubspecific names and, to some extent, also incorrect subsequent spellings. In the family-group a total of 28 names are included in the nomenclator, of which 21 are available and seven unavailable names. Of the available names in the family-group, six are invalid for nomenclatural reasons. In the genus-group a total of 57 names are included in the catalogue. Of the available names in the genus-group, 11 are invalid for nomenclatural reasons. In the species-group a total of 499 names are included, of which 463 are available, but 21 are invalid for nomenclatural reasons. All names are given in their original combination and spelling (mandatory changes are discussed and corrected spellings are provided), along with the reference to the original publication. For each family- and genus-group name, the original classification and the type genus or type species, respectively, are given. For species-group taxa the type locality and type horizon (for fossil taxa) are provided, usually as given in the original publication. A new name,Cleopatraadaminom. nov., is proposed for the fossilCleopatracylindrica(Adam, 1957), which is a homonym ofCleopatracridlandicylindricaMandahl-Barth, 1954, and a lectotype forCleopatradubiaAdam, 1959 is designated. A new replacement nameLeloupiellanom. nov. is proposed forStormsiaLeloup, 1953 which is a homonym ofStormsiaBourguignat, 1891.
Dealing with the remaining controversies of probiotic safety
Authors: van den Nieuwboer M. , Claassen E.
Published: May 2019

A clear safety profile of probiotics in clinical practice is essential in decision-making for all stakeholders and regulators. Probiotics have been investigated in different target populations, conditions and age groups. This also includes the use of probiotics in critically ill patients. Despite promising results reported with the use of probiotics and synbiotics, there is still a lively discussion regarding the proper and safe use of probiotics among physicians, researchers and regulators. This doubt and debate was sparked by the high incidence in mortality reported in a study with critically ill patients. Whereas no causal relationship has been established since, safety of probiotic has been questioned. In response, an overwhelming body of evidence suggesting that probiotics are safe has been compiled. Moreover, data indicates that probiotics reduce the number of adverse events compared to the control. However, due to a lack of standardised safety reporting in clinical studies, a strong evidence base on probiotic safety remains to be established. Here, we will discuss: (1) the rationale for using probiotics in the critically ill; (2) what happened during the Dutch Pancreatitis trial; (3) what are the known safety risks of probiotics based on the available data; and finally (4) how standardisation in safety reporting can drive probiotic innovation. Building a strong safety profile for probiotic strains will solidify its use in individuals that can benefit the most from microbial modulation.
Effect of daily supplementation with ubiquinol on muscle coenzyme Q10 concentrations in Thoroughbred racehorses
Authors: Thueson E. , Leadon D.P. , Heaton R. , Hargreaves I.P. , Bayly W.M.
Published: May 2019

Coenzyme Q10 (CoQ10) is essential for mitochondrial aerobic production of ATP via oxidative phosphorylation, but has had little study in horses. Its biologically active form is ubiquinol. We evaluated the effects of daily supplementation with ubiquinol on gluteal muscle CoQ10 concentrations and an indicator of phosphorylation status, citrate synthase (CS), in fit Thoroughbreds. Six horses received either 1 g ubiquinol daily for 3 weeks followed by 21 days without supplement, or had a 3 week unsupplemented period followed by 3 weeks of supplementation. A seventh horse received the same diet as the other horses, but no supplement, and served as a negative control. Middle gluteal muscle biopsies were obtained before feeding at day 0 (baseline), and after 10 and 21 days of each period. Muscle CoQ10 concentration was determined by HPLC with UV detection at 275 nm. CS was measured spectrophotometrically at 37 °C and related to mitochondrial CoQ10 concentration. Results (mean ± standard deviation) were analysed by 2-way RM ANOVA for effects of supplementation and time (P<0.05). Muscle baseline and non-supplemented CoQ10 concentrations prior to beginning supplementation were not different (458±156 pmol/mg protein). Values increased from 413±276 (baseline) to 977±227 pmol/mg after 10 days supplementation (P=0.03), but not thereafter (21 days: 867±194 pmol/mg;P=0.31). CS activity increased in concert with CoQ10 concentration (P=0.02; baseline: 67±18, 10 days: 155±68, 21 days: 163±78 nmol/(min.mg)). Muscle CoQ10 concentration was strongly correlated with CS activity (P=0.002; r2=0.53). Discontinued supplementation decreased muscle CoQ10 concentration and tended towards significance (P=0.06). Daily dietary supplementation with 1 g ubiquinol increased gluteal muscle [CoQ10] from day 0 to day 10, but not from days 10 to 21, possibly indicating saturation of mitochondria with ubiquinol. Associated increases in CS activity suggested aerobic metabolic capacity was enhanced with supplementation. Discontinuing supplementation decreased CoQ10 concentration.
Air Purification from CO2 Gas Using a Scrubber and Suggestions to Reach a Better Efficiency
Authors: Vlasák Jaroslav , Svěrák Tomáš , Dreveny Lukáš , Kalivoda Josef
Published: May 2019

This thesis deals with the testing of our wet scrubber by a laboratory at the Faculty of Chemistry, Brno University of Technology. On this wet scrubber, the CO2 capture efficiency is tested with a splash liquid consisting of 1 % NaOH. An overview of the system, which could increase the capture efficiency of CO2 from the gas mixture or other harmful particulates in the air, could be improved after introduction. The thesis also deals with finding methods to better capture efficiency of solid particles and gases on the wet scrubber.
Determination of PPD in Hair Dyes Collected from Local Markets in El-Bieda City - Libya
Authors: Elmanfe Galal , Khreit Osama , Abduljalil Omukalthum
Published: May 2019

This study aims to determine the para-phenylenediamine (PPD) in hair dyes by High-Performance Liquid Chromatography (HPLC). In the presented study, ten hair dye samples were collected from local markets in El-Bieda - Libya. A rapid, simple and reliable method is developed and validated for the determination of PPD in hair dyes samples using 50% methanol solution as solvent. The method was validated over a wide linear range of 5 – 25 µg/mL with correlation coefficients being consistently greater than 0.997. The LOD and LOQ were 1.21 µg/ ml and 3.67 µg/ ml, respectively. Relative standard deviation (% R.S.D.) ranged between 0.07 and 1.15 %. The minimum PPD level was observed in Beauty Touch (Blonde) sample (0.0855 % w/w), while Jourin sense Cosmetics (Black Blue) sample showed the highest PPD content (2.2526 % w/w). The HPLC measurments indicated that the results of PPD concentrations in Black colour samples were in the range of 0.3705 % - 2.2526 % w/w. Whereas its concentrations in anthor colour samples were in the range of 0.0855 % - 0.5936 % w/w. The level of PPD in Black colour samples were higher than other colour samples. The PPD content in all the samples analyzed in this study are well below the allowable limits set by the US Food and Drugs Administration.
Improvement of Performance of Electroluminescent Panel by Reducing the Thickness of Dielectric Layer
Authors: Hrabal Michal , Dzik Petr , Omasta Lukáš , Vala Martin , Kalina Michal , Florián Pavel , Weiter Martin
Published: May 2019

Alternating-current powder-based electroluminescence is currently the only technique for quick and easy preparation of large area, low cost electroluminescent panels by the means of material printing. Manufacturing of the panels is currently done exclusively by screen printing which is associated with deposition of much thicker layers than typical for other methods of material printing. Typical thickness of layers is in the order of tens of microns and more. The overall thickness of films forming the panel is however a serious shortcoming of the devices because the driving voltage for generation of light needs to be high and the thickness of layers render the panel non transparent from the side of the dielectric layer. One layer of dielectric films screen printed from the commercially available formulation is approximately 10 μm thick and cannot be effectively reduced anymore and thus another printing technique needs to be exploited. The goal of this work is to define and optimize a composition of a novel ink jet printing formulation of dielectric film and verification of parameters of the final layers for use in this type of technology. The major benefits of ink jet printed dielectric layer are the possible preparation of a panel emitting light from both sides with reduced driving voltage needed for its operation.
Development of High-Compressive Heavyweight Concrete Based on Portland Cement and Supplementary Cementitious Materials
Authors: Dragomirová Janette , Palou Martin
Published: May 2019

The manufacture of optimized heavyweight concrete takes into consideration the type of aggregates, composition of blended cement, water-to-cement ratio, additives etc. The density of concrete depends mainly on the specific gravity of the used aggregates. Generally, concretes with specific gravities higher that 2600 kg m-3 are called heavyweight concretes and aggregates with specific gravity higher than 3000 kg m-3 are considered as heavyweight aggregates according to EN [1,2]. Concrete is a low cost material and easy to produce in varied compositions when compared to other shielding materials based on ceramics [3]. It is composed of a well-proportioned mixture of light and heavy nuclei. It is therefore efficient both in absorbing gamma rays and in slowing down fast neutrons by elastic and inelastic scattering [2]. Light materials, especially hydrogenous materials which contained in the water of hydration of the set cement (concrete) attenuate fast neutrons as a consequence of the high cross-section of hydrogen [4].
Modification of PEDOT:PSS Surface by RGD Peptide
Authors: Tumová Šárka , Malečková Romana , Enev Vojtěch , Stříteský Stanislav , Víteček Jan , Vala Martin , Weiter Martin
Published: May 2019

In this paper, a novel technique for modification of PEDOT:PSS surface by the arginine-glycine-aspartic (RGD) acid, using a bifunctional photolinker sulfosuccinimidyl 6-(4’-azido-2’-nitrophenylamino) hexanoate (sulfo-SANPAH), is presented. The technique is based on the UV light initialized immobilization of the photolinker to the surface of the polymer and subsequent link of the RGD peptide to the photolinker via coupling reaction. The aim of this modification is the improvement of the biocompatibility and hydrophilicity of the polymer PEDOT:PSS. To confirm if the process of conjugation of RGD peptide to the surface of the polymer PEDOT:PSS was successful, the contact angle measurement, Fourier transform infrared spectroscopy, Raman spectroscopy and elemental analysis was performed. All of the obtained results indicate the conjugation of RGD peptide to the PEDOT:PSS surface was successful.
The Effect of Final Heating on the Concentration of Phthalic Acid Esters by Sous-Vide Production
Authors: Jandlová Marcela , Jarošová Alžbeta , Kameník Josef
Published: May 2019

In our research the influence of thermal heating on the release of plasticizers from plastics into the meat product and water was researched. The two most widely used plasticizers, dibutyl phthalate (DBP) and di-(2-ethylhexyl) phthalate (DEHP), were detected. Both of the plasticizers have a negative effect on the health. And both are regulated by regulation of the European Union. In this study were researched phthalates in products prepared by sous-vide technology and it was studied effect of reheating on migration of phthalates. The average concentrations of both phthalate esters, DBP and DEHP, in heated water decreased. The average concentration of DBP in water before heating was detected 0.82 mg/100 ml and after heating 0.52 mg/100 ml, the average concentration of DEHP in water before heating was established 0.33 mg/100 ml and after heating 0.19 mg/100 ml. In plastic wraps, average DBP concentration with reheating increased and average DEHP concentration with reheating dropped. The average DBP concentration in plastic packaging, heating at 60 °C/12 h was determined of 9.87 mg/dm2 after reheating 60 °C/1 h was detected of 15.40 mg/dm2. The average concentration of DEHP in plastic packaging, heating at 60 °C/12 h was determined of 58.71 mg/dm2 and after reheating 60 °C/1 h was detected of 28.28 mg/dm2. The average DBP concentration in meat products due to reheating decreased, the average DEHP concentration in meat products increased. The average DBP concentration in meat products heating at 60 °C/12 h was detected of 8.39 mg/g dry matter and after reheating of 6.43 mg/g dry matter, the average DEHP concentration heating at 60 °C/12 h was determined of 25.37 mg/g dry matter and after reheating of 65.51 mg/g dry matter..
Examining the KENOSIS of the CCAP of Blantyre Synod in poverty alleviation in Malawi
Authors: Jere Q. , Williams D. T.
Published: May 2019

This article argues that the high level of poverty within the CCAP Blantyre Synod has been due to a lack of kenōsis within the church. The Synod is located in the southern part of Malawi which experiences the highest level of poverty in Malawi. If the kenōsis of Jesus were practised, it would lead to drastic change and enhance societal progress in the lives of the people. The CCAP Synod's inability to practise kenōsis in their daily social and economic life is reflected in the high level of poverty within the congregants and the entire Synod operating system.
Joseph Williams and pioneer missionary frustration
Authors: Williams D.
Published: May 2019

The year 2016 is notable for several significant anniversaries. One which could well be overlooked is that it is 200 years since the arrival of the first missionary to have been resident among the Xhosa. Although he had a short ministry, dying just two years later, Joseph Williams had a remarkable impact. The article briefly recounts his story and suggests that a cause of his early demise was frustration at his being caught up in the politics of the day, but also that his death could well have proved to have been beneficial to the progress of the gospel in the Eastern Cape.
Оператор композиции на пространствах Лебега со смешанной нормой
Authors: Evseev Nikita Aleksandrovich , Menovshchikov Aleksandr Viktorovich
Published: May 2019

Известно, что ограниченность оператора композиции на пространствах
Лебега эквивалентна суммируемости объемной производной измеримого
отображения, индуцирующего данный оператор. В настоящей работе
доказывается аналогичный результат для пространств Лебега со
смешанной нормой в классе отображений, сохраняющих
приоритет переменных.
Библиография: 16 названий.
Ортогональные базисы из инволюций в адамаровых алгебрах
Authors: Ivanov Dmitry Nikolaevich
Published: May 2019

Понятие адамарова разложения полупростой ассоциативной
конечномерной комплексной алгебры обобщает понятие классических
матриц Адамара, которые отвечают случаю коммутативных алгебр.
Алгебры, допускающие адамаровы разложения, называются адамаровыми.
Исследуются образы ортогональных базисов из инволюций в адамаровых
алгебрах при канонических проекциях этих алгебр на их простые
компоненты. Используя технику, связанную с рассмотрением
центральных примитивных идемпотентов адамаровых алгебр,
получено необходимое условие на семейство инволютивных матриц
фиксированного порядка, чтобы оно являлось указанным образом.
Показано также, что это необходимое условие не является
достаточным. Попутно, приведены новые доказательства некоторых
установленных ранее результатов.
Библиография: 6 названий.
Гипотеза Новикова
Authors: Yu Guoliang
Published: May 2019

Дан обзор недавних достижений по гипотезе Новикова, а также приложений к проблемам топологической жесткости и нежесткости.
Библиография: 77 названий.
$SU$-бордизмы: структурные результаты и геометрические представители
Authors: Limonchenko Ivan Yur'evich , Panov Taras Evgenievich , Chernykh George
Published: May 2019

В первой части обзора дано современное изложение структуры кольца специальных унитарных бордизмов, включающее как классические геометрические методы Коннера-Флойда, Уолла и Стонга, так и технику спектральной последовательности Адамса-Новикова и формальных групп, в том числе результаты, полученные после фундаментальной работы С. П. Новикова 1967 г. Во второй части мы используем методы торической топологии для построения и описания геометрических представителей в классах $SU$-бордизма, включая торические и квазиторические многообразия, а также многообразия Калаби-Яу.
Библиография: 56 названий.
Astronomia, ludicidade, enculturação científica: um projeto de extensão voltado a crianças e jovens com indicadores de altas habilidades
Authors: Brito Alan Alves , Massoni Neusa Teresinha
Published: May 2019

Reportamos neste trabalho uma experiência didática que buscou disseminar conceitos e discutir fenômenos astronômicos junto a jovens estudantes do Ensino Fundamental com indicadores de altas habilidades, no âmbito de um projeto de extensão universitária desenvolvido em parceria com a Sala de Recursos para Altas Habilidades/Superdotação, que congrega estudantes da educação fundamental da rede pública de Porto Alegre, RS. Uma análise qualitativa preliminar de alguns episódios de ensino é oferecida e fornece indícios de que atividades que envolviam ludicidade e estimulação à interação e ao diálogo tendiam a favorecer o engajamento, a socialização e a enculturação de conceitos científicos. Algumas reflexões sobre a importância deste tipo de projeto e de atividades voltadas à diversidade na educação científica também são oferecidas ao longo do texto.
Condicionantes de aprendizagens de professores que ensinam matemática em contextos de comunidades de prática
Authors: Estevam Everton José Goldoni , Cyrino Márcia Cristina de Costa Trindade
Published: May 2019

O presente trabalho tem como objetivo investigar os elementos inerentes aos contextos de Comunidades de Prática (CoPs) de Professores que ensinam Matemática que oferecem oportunidades de aprendizagem àqueles que delas participam. As análises, pautadas na Teoria Fundamentada, envolvem artigos, teses e dissertações, cujos elementos identificados são associados a situações evidenciadas na prática de uma CoP. Seus resultados constituem um quadro analítico de trajetórias de aprendizagem dos professores, assim constituído: (i) itinerância de engajamento; (ii) compartilhamento de repertórios; (iii) compromisso solidário; (iv) dinâmicas do(a) grupo/comunidade; (v) reflexões compartilhadas e sustentadas; (vi) relações de confiança e respeito; (vii) espaços de vulnerabilidade e agência mediada; e (viii) dinamicidade do expert e papel do(s) formador(es). Nesses termos, as conclusões sugerem reconhecer as Comunidades de Prática como um espaço privilegiado para desenvolvimento profissional de professores que ensinam Matemática
Hábitos alimentares e concepções sobre alimentação equilibrada: uma investigação com alunos do oitavo ano do ensino fundamental
Authors: Scheunemann Camila Maria Bandeira , Lopes Paulo Tadeu Campos
Published: May 2019

Esta pesquisa teve por objetivo investigar as concepções de estudantes do Ensino Fundamental sobre seus hábitos alimentares e alimentação equilibrada. Este estudo qualitativo e caracterizado como pesquisa exploratória incluiu 15 alunos do oitavo ano do Ensino Fundamental de uma escola estadual da região noroeste do estado do Rio Grande do Sul, Brasil. Os dados foram coletados mediante questionário e discutidos com base em uma análise de conteúdo. Os resultados revelaram que os alunos compreendem ao menos em parte a importância de uma alimentação balanceada para a saúde. Além disso, os participantes contribuíram com concepções variadas sobre alimentação balanceada, algumas das quais apresentaram uma relação com os conhecimentos científicos associados, ao passo que outras eram embasadas principalmente em conceitos espontâneos. Contudo, algumas concepções sobre o tema careceram de robustez, o que aponta para a necessidade de aprofundar a discussão sobre alimentação equilibrada na escola.
CTS ou CTSA: o que (não) dizem as pesquisas sobre educação ambiental e meio ambiente?
Authors: Luz Rodrigo , Queiroz Marcelo Bruno Araújo , Prudêncio Christiana Andréa Vianna
Published: May 2019

Apresentamos um levantamento referente à produção científica sobre CTS/CTSA existente nos principais periódicos e eventos da área de Educação em Ciências e da Educação Ambiental, no período de 2010 a 2016. Analisamos integralmente 27 trabalhos que se filiam à perspectiva CTSA objetivando verificar os motivos, pressupostos e interesses que marcam a escolha dos pesquisadores por essa denominação, bem como os sentidos que atribuem ao Meio Ambiente e à Educação Ambiental. Diante dos resultados podemos considerar que ainda não existe um consenso na área quanto à compreensão dos pressupostos e características presentes na perspectiva CTSA em comparação à perspectiva CTS, existindo também uma variedade de sentidos atribuídos ao Meio Ambiente. Ademais, existem possibilidades reais de uma produtiva interface com a Educação Ambiental, em que se destacam tendências conservacionistas ou críticas no tratamento das temáticas ambientais presentes nas pesquisas.
O caso histórico Marie Curie: investigando o potencial da história da ciência para favorecer reflexões de professores em formação sobre natureza da ciência
Authors: Almeida Beatriz Carvalho , Justi Rosária
Published: May 2019

O presente trabalho tem por objetivo discutir sobre as contribuições de um caso histórico sobre a cientista Marie Curie para favorecer reflexões sobre Natureza da Ciência por parte de professores em formação à luz da perspectiva de Allchin (2013) para o ensino contextualizado e funcional de Natureza da Ciência (NC). O caso histórico foi aplicado em uma turma de estudantes do curso Licenciatura em Química de uma universidade pública. Todas as aulas relacionadas à implementação desta proposta foram registradas em áudio e vídeo. A partir das reflexões explicitadas pelos licenciandos ao longo deste processo, discutimos sobre a relevância da proposta para nortear discussões sobre NC importantes para favorecer uma compreensão funcional sobre ciência.
Seasonal characteristics of trace gas transport into the extratropical upper troposphere and lower stratosphere
Authors: Inai Yoichi , Fujita Ryo , Machida Toshinobu , Matsueda Hidekazu , Sawa Yousuke , Tsuboi Kazuhiro , Katsumata Keiichi , Morimoto Shinji , Aoki Shuji , Nakazawa Takakiyo
Published: May 2019

Abstract. To investigate the seasonal characteristics of trace gas
distributions in the extratropical upper troposphere and lower stratosphere
(ExUTLS) as well as stratosphere–troposphere exchange processes, origin
fractions of air masses originating in the stratosphere, tropical
troposphere, midlatitude lower troposphere (LT), and high-latitude LT in the
ExUTLS are estimated using 10-year backward trajectories
calculated with European Centre for Medium-Range Weather Forecasts (ECMWF)
ERA-Interim data as the meteorological input. Time series of trace gases
obtained from ground-based and airborne observations are incorporated into
the trajectories, thus reconstructing spatiotemporal distributions of trace
gases in the ExUTLS. The reconstructed tracer distributions are analyzed with
the origin fractions and the stratospheric age of air (AoA) estimated using
the backward trajectories. The reconstructed distributions of SF6 and
CO2 in the ExUTLS are linearly correlated with those of AoA because of
their chemically passive behavior and quasi-stable increasing trends in the
troposphere. Distributions of CH4, N2O, and CO are
controlled primarily by chemical decay along the transport path from the
source region via the stratosphere and subsequent mixing of such stratospheric
air masses with tropospheric air masses in the ExUTLS.
Dimethyl sulfide and its role in aerosol formation and growth in the Arctic summer – a modelling study
Authors: Ghahreman Roya , Gong Wanmin , Galí Martí , Norman Ann-Lise , Beagley Stephen R. , Akingunola Ayodeji , Zheng Qiong , Lupu Alexandru , Lizotte Martine , Levasseur Maurice , Leaitch W. Richard
Published: May 2019

Abstract. Atmospheric dimethyl sulfide, DMS(g), is a climatically important sulfur compound and is the main source of biogenic sulfate aerosol in the Arctic atmosphere. DMS(g) production and emission to the atmosphere increase during the summer due to greater ice-free sea surface and higher biological activity. We implemented DMS(g) in the GEM-MACH model (GEM: Global Environmental Multiscale – Environment and Climate Change Canada's (ECCC) numerical weather forecast model, MACH: ECCC's Modelling Air quality and CHemistry – chemistry and aerosol microphysics) for the Arctic region, and compared model simulations with DMS(g) measurements made in Baffin Bay and the Canadian Arctic Archipelago in July and August 2014. Two sea water DMS(aq) datasets were used as input to the simulations: (1) DMS(aq) climatology dataset based on seawater concentration measurements (Lana et al., 2011) and (2) DMS(aq) dataset based on satellite detection (Galí et al., 2018). In general, GEM-MACH simulations underpredict DMS(g) measurements, likely due to negative biases in both DMS(aq) datasets. Yet, higher correlation and smaller bias were obtained with the satellite dataset. Agreement with the observations improved by replacing climatological values with in situ measured DMS(aq) concurrently with atmospheric observations over Baffin Bay and Lancaster Sound area in July 2014. The addition of DMS(g) to the GEM-MACH model resulted in a significant increase in atmospheric SO2 for some regions in the Canadian Arctic (up to 100 %). Analysis of the size-segregated sulfate aerosol in the model shows that a significant increase in sulfate mass occurs for particles with a diameter smaller than 200 nm due to formation and growth of biogenic aerosol at high latitudes (> 70° N). The enhancement in sulfate particles is most significant in the size range of 50 to 100 nm, however, this enhancement is stronger in the 200–1000 nm size range at lower latitudes (
Statistical analysis of very high-resolution precipitation data and relation to atmospheric circulation in Central Germany
Authors: Brieber Annika , Hoy Andreas
Published: May 2019

Abstract. The cumulative occurrence of heavy precipitation and flood events
during recent years in various Central European locations emphasises the
urgent need to improve extreme rainfall observations and forecasts.
Precipitation gauges based on a weighing system allow the recording of
intense short-term precipitation events with a very high temporal resolution
(down to 1 min). In this study, observational data that were collected
during the period 2000 to 2016 for 126 stations of two corresponding
measuring networks in the Central German state of Hesse were investigated for
the first time to answer the following questions: (1) Are the recorded
high-resolution precipitation data plausible and comparable between both
networks? (2) Which atmospheric circulation patterns were specifically prone
to produce short-term intense precipitation events? Although the two networks are equipped with the same measuring technology,
systematic differences concerning their maximum 1 min precipitation amounts
occur, which may be explained by different instrumental software settings. We
could minimise those discrepancies by accumulating the existing 1 min data
to 15 min. Subsequently, the 15 min daily maximum values and accumulated daily sums
were analysed regarding the impact of large-scale atmospheric circulation
patterns, based on the well-known “Großwetterlagen” classification. We
identified a clear connection between atmospheric circulation and heavy
precipitation over Hesse, while indicating some differences between daily
(24 h) and sub-daily (15 min) events. High daily precipitation sums often
relate to westerlies and central cyclones, while intense short-term events
are frequently generated by warm-humid continental air from southern and
eastern Europe as well as trough conditions, where the trough's core is found
west of the study area. Our results underline the importance of expanding and
enhancing high-resolution precipitation observations in Germany as well as
other countries.
Design methodology to determine water quality monitoring strategy of surface water treatment plants
Authors: Ross Petra , van Schagen Kim , Rietveld Luuk
Published: May 2019

Abstract. Primary goal of a drinking water company is to produce safe drinking water fulfilling the quality standards defined by national and international guidelines. To ensure the produced drinking water meets the quality standards, sampling of the drinking water is carried out on a regular (almost daily) basis. It is the dilemma that the operator wishes to have a high probability of detecting a bias while minimizing his measuring effort. In this paper a seven step design methodology is described on how to come to an optimized water quality monitoring scheme. It was shown that the existing on-line monitoring program of a WTP could be optimized. Besides using soft-sensors as surrogate sensors for parameters currently not available on-line, they can also provide a cost effective alternative when used to determine multiple parameters required through one single instrument.
The influence of litter crusts on soil properties and hydrological processes in a sandy ecosystem
Authors: Liu Yu , Cui Zeng , Huang Ze , Miao Hai-Tao , Wu Gao-Lin
Published: May 2019

Abstract. Litter crusts are integral components of the water budget in terrestrial
ecosystems, especially in arid areas. This innovative study is designed to
quantify the ecohydrological effectiveness of litter crusts in desert
ecosystems. We focus on the positive effects of litter crusts on soil water
holding capacity and water interception capacity compared with biocrusts.
Litter crusts significantly increased soil organic matter compared to
biocrusts and bare lands, by 2.4 times and 3.8 times, respectively. Higher
organic matter content resulted in increased soil porosity and decreased soil
bulk density. Meanwhile, soil organic matter can help to maintain maximum
infiltration rates. Litter crusts significantly increased the water
infiltration rate under high water supply. Our results suggested that litter
crusts significantly improve soil properties, thereby influencing
hydrological processes. Litter crusts play an important role in improving
hydrological effectiveness and provide a microhabitat conducive to vegetation
restoration in dry sandy ecosystems.
The Pacific-Indian Ocean Associated Mode in CMIP5 Models
Authors: Yang Minghao , Li Xin , Shi Weilai , Zhang Chao , Zhang Jianqi
Published: May 2019

Abstract. The Pacific-Indian Ocean associated mode (PIOAM) is the product of the tropical air-sea interaction at the cross-basin scale and the main mode of ocean variation in the tropics. Evaluating the capability of current climate models to simulate the PIOAM and finding the possible factors that affect the simulation results are beneficial to obtain more accurate future climate change prediction. Based on 55-yr the Hadley Centre Global Sea Ice and Sea Surface Temperature (HadISST) reanalysis and the output data from twenty-one Coupled Model Intercomparison Project (CMIP) phase 5 (CMIP5) models, the PIOAM in these CMIP5 models is assessed. It is found that the explained variance of PIOAM in almost all twenty-one CMIP5 models are underestimated. Although all models reproduce the spatial pattern of the positive sea surface temperature anomaly in the eastern equatorial Pacific well, only one-third of these models successfully simulate the ENSO mode with the east-west inverse phase in the Pacific Ocean. In general, CCSM4, GFDL-ESM2M and CMCC-CMS have a stronger capability to capture the PIOAM than that of the other models. The strengths of the PIOAM in the positive phase in less than one-fifth of the models are slightly stronger, and very close to HadISST reanalysis, especially in CCSM4. The interannual variation of PIOAM can be measured by CCSM4, GISS-E2-R and FGOALS-s2. Further analysis indicates that considering the carbon cycle, resolving stratosphere, chemical process or increasing the horizontal resolution of the atmospheric model may effectively improve the performance of the model to simulate the PIOAM.
Rapid retreat of permafrost coastline observed with aerial drone photogrammetry
Authors: Cunliffe Andrew M. , Tanski George , Radosavljevic Boris , Palmer William F. , Sachs Torsten , Lantuit Hugues , Kerby Jeffrey T. , Myers-Smith Isla H.
Published: May 2019

Abstract. Permafrost landscapes are changing around the Arctic in response to climate
warming, with coastal erosion being one of the most prominent and hazardous
features. Using drone platforms, satellite images, and historic aerial
photographs, we observed the rapid retreat of a permafrost coastline on
Qikiqtaruk – Herschel Island, Yukon Territory, in the Canadian Beaufort Sea.
This coastline is adjacent to a gravel spit accommodating several culturally
significant sites and is the logistical base for the Qikiqtaruk – Herschel
Island Territorial Park operations. In this study we sought to (i) assess
short-term coastal erosion dynamics over fine temporal resolution,
(ii) evaluate short-term shoreline change in the context of long-term
observations, and (iii) demonstrate the potential of low-cost lightweight
unmanned aerial vehicles (“drones”) to inform coastline studies and
management decisions. We resurveyed a 500 m permafrost coastal reach at high
temporal frequency (seven surveys over 40 d in 2017). Intra-seasonal
shoreline changes were related to meteorological and oceanographic variables
to understand controls on intra-seasonal erosion patterns. To put our
short-term observations into historical context, we combined our analysis of
shoreline positions in 2016 and 2017 with historical observations from 1952,
1970, 2000, and 2011. In just the summer of 2017, we observed coastal retreat
of 14.5 m, more than 6 times faster than the long-term average rate of
2.2±0.1 m a−1 (1952–2017). Coastline retreat rates exceeded
1.0±0.1 m d−1 over a single 4 d period. Over 40 d, we estimated
removal of ca. 0.96 m3 m−1 d−1. These findings highlight
the episodic nature of shoreline change and the important role of storm
events, which are poorly understood along permafrost coastlines. We found
drone surveys combined with image-based modelling yield fine spatial
resolution and accurately geolocated observations that are highly suitable to
observe intra-seasonal erosion dynamics in rapidly changing Arctic
landscapes.
El disenso político en España (1979-82) según el Equipo de Coyuntura Económica en el diario "El País"
Authors: Sánchez-Lissen Rocío , Pazos Casado Manuel Luis , Sanz-Díaz María Teresa
Published: May 2019

Este trabajo se centra en un conjunto de artículos publicados en el diario El País por el Equipo de Coyuntura Económica, bajo la dirección del profesor Fuentes Quintana durante la transición política española, entre 1978 y 1982. En ellos se hizo un intenso seguimiento de la coyuntura económica, cuando el país estaba aún inmerso en la grave crisis del petróleo, con una visión crítica de la política económica aplicada entonces. Al mismo tiempo, con los artículos se pretendía concienciar e implicar a los ciudadanos en la resolución de los problemas económicos. La política de consenso heredada de los Pactos de la Moncloa fue interrumpida por las nuevas circunstancias políticas como resultado de las elecciones generales de 1979, que dieron paso al denominado periodo de disenso político, según Fuentes Quintana. Desde el exterior, la llegada de la segunda crisis del petróleo ese mismo año y las turbulencias del mercado financiero internacional agravaron aún más la situación económica española. En el interior, la presión salarial, el deterioro de los excedentes empresariales y el creciente déficit público exigían de la política económica soluciones contundentes, que fueron insistentemente reclamadas desde esa tribuna de prensa por ese equipo de economistas.
Training and Development Competencies: A Comparative Study of Their Importance and Demonstration
Authors: M. Srimannarayana
Published: May 2019

The study aims at assessing the importance of training and development competencies of training and development professionals and their demonstration of the same while performing their roles and responsibilities, as well as to identify the gaps between the importance and the demonstration. The study adopted the conceptual framework from the American Society of Training and Development (ASTD) model, which was created by Arneson, Ruthwell and Naughton (2013). 248 training and development professionals were the sample of the study for the rating of importance and another 248 line professionals, who were familiar with the training and development professionals’ functioning, were the sample of the study for the demonstration rating. Based on the data collected from the sampled professionals and its analysis, the study concludes that overall, technology literacy, performance improvement, evaluating learning impact, managing learning programs, coaching, knowledge management and change management are the areas of competencies in which training and development professionals need to enhance their proficiency.