bluuebunny/crossref_metadata_2025 huggingface dataset:
Dados científicos abertos: identificando o papel das políticas de gestão e das agências de fomento
Authors: Monteiro Gabriela , Lucas Elaine Rosangela De Oliveira
Published: June 2019

As transformações das práticas científicas apontam que a ciência vive um momento de atenção ao trabalho colaborativo e ao compartilhamento de dados de pesquisa, com o intuito de acelerar a construção de novos conhecimentos e aumentar a eficiência dos investimentos. Agências de fomento internacionais e brasileiras já iniciaram recomendações e exigências para que os projetos financiados incluam um plano de gestão de dados de pesquisa para o compartilhamento em acesso aberto. Em curto ou médio prazo, cada universidade ou centro de pesquisa precisará estar preparado para atender às exigências dos órgãos financiadores. Assim, esta pesquisa tem o objetivo principal de desenvolver um mapeamento das principais políticas institucionais das agências de fomento nacionais e internacionais na promoção do acesso aberto aos dados de pesquisas científicas desenvolvidas no Brasil. A revisão inicial da literatura contempla os temas da comunicação científica e do movimento de acesso aberto e ainda conceitos sobre dados científicos abertos e uma breve contextualização do fomento à pesquisa científica no Brasil. Com relação aos procedimentos metodológicos delineados, a pesquisa é considerada social aplicada no que ser refere a sua finalidade. Quanto ao objetivo central, terá característica exploratória e descritiva e, em relação aos procedimentos técnicos para obtenção dos dados, será realizada pesquisa bibliográfica-documental. A coleta e o tratamento dos dados para identificação das agências de fomento que farão parte da pesquisa documental foi iniciada em abril deste ano. Os dados foram obtidos com base na lista de bolsistas de Produtividade em Pesquisa do Conselho Nacional de Desenvolvimento Científico e Tecnológico vigentes em julho de 2017 e por meio da extração de informações sobre o financiamento de seus projetos, constantes na base de currículos acadêmicos da Plataforma Lattes. A pesquisa encontra-se na fase de submissão ao exame de qualificação.
Proposta para a construção de um ambiente de inovação para redes de telecomunicações suas contribuições para a manutenção do poder informacional do estado na segurança pública
Authors: Assumpção Luciano Castilho , Minghelli Marcelo
Published: June 2019

A informação é um recurso empregado pelo Estado, para controlar indivíduos ou grupos sociais. Este, que é chamado de poder informacional do Estado é evidenciado nas ações Policiais na medida em a confidencialidade, integridade e disponibilidade são requisitos para as telecomunicações nas operações de segurança pública. Para tanto, se desenvolveu um segmento de mercado de telecomunicações denominado Missão Crítica, destinado a atender estes requisitos dos órgãos oficiais de segurança pública. A modalidade de telecomunicações por rádio é chamada de Professional Radio Mobile, e utiliza recursos de criptografia, modulação digital troncalizada em um processo que envolve a tecnologia, a organização e recursos humanos. Dadas as limitações desses agentes no processo, ideias de melhorias a partir das experiências de uso podem ser estimuladas, e de maneira estruturada, categorizada como informação obtida pela percepção de padrões, compor uma proposta que vise a construção de um ambiente de inovação na área de telecomunicações do órgão. Para isso, se pode fazer um estudo de caso a partir da análise de elementos pré- estruturais de infraestrutura (laboratórios, testes) recursos humanos (formados e capacitados em ações de compartilhamento dos aprendizados pelo uso) e fomento (recursos financeiros). Estas ações visam resultar em contribuições para a segurança da informação em operações policiais e assim, contribuir para a manutenção do poder informacional do Estado.
COLD FLOW NUMERICAL ANALYSIS OF GAS MICROTURBINE COMBUSTION CHAMBER THROUGH CFD TOOL
Authors: Caetano G. K. , Carvalho J. F. T. de , Rosa J. S.
Published: June 2019

Gas turbines are equipment used mainly in the generation of electric energy. They have as one of their main components the combustion chamber. Therefore, it is relevant to study the characteristics of this component, in order to reach a satisfactory operation. In this context, this paper presents an analysis of a combustion chamber applied to a gas turbine with a cold flow approach using the numerical theoretical method, through the computational fluid dynamics technique. In this experiment, the software Abaqus CFD (computational fluid dynamics) – present in the 3DExperience platform – and the finite volume method are used. The objective was to evaluate the flow, pressure and velocity profiles during the single-phase flow. The gas turbine prototype is configured using a combustion chamber of reverse flow type in order to decrease flow velocity and increase the combustion efficiency. Based on input data obtained from practical experiments, the calculation of the number and Reynolds confirmed – according to the literature of fluid mechanics – the occurrence of a flow classified as turbulent, with chaotic and random motion, what allows defining the ideal point of injection from analysis of velocity plots with stream lines. In addition, a Mach number smaller than 0.3 confirms the theory of having an incompressible flow, in which compressibility effects can be disregarded. The analysis of mass flow rates of the combustion zones made it possible to evaluate maximum differences of 3% between the design data and the one found in the study. To determine the inherent error of the mesh in the CFD study was calculated through the grid conference method, the value found was around 2.68%.
EVALUATION OF STATIC PRESSURE BEHAVIOR IN AN OSCILLATING WATER COLUMN WAVE ENERGY CONVERTER
Authors: Pinto Jr E. A. , Gomes M. Das N. , Rocha L. A. O. , Santos E. D. dos , Isoldi L. A.
Published: June 2019

The international scenario of non-renewable resources scarcity coupled with increasing energy demand are incentives for the diversification of the world's energy matrix with a focus on renewable energy sources. Among these sources, energy from sea waves is especially attractive because its global resource is estimated around 2 TW, comparable to the average electrical power consumed worldwide each year. There are currently several technologies proposed for the sea wave energy conversion into electricity. Among them it stands out the Oscillating Water Column (OWC) converter, which basically consists of a hydropneumatic chamber and a turbine duct where a turbine is installed. Its chamber is opened below the sea water free surface while the turbine duct outlet is free to atmosphere. Inside the chamber the water free surface oscillating movement produced by the incident waves causes the air to flow through the turbine duct and to activate the turbine, so the OWC principle of operating can be approximated to a cylinder-piston system. Therefore, one of the methodologies used in the computational modeling to simulate the operating principle of this device is the Piston Methodology, which simplifies the problem analysis considering only the air flow through the OWC converter. Among the phenomena that occur within the OWC device, the static pressure behavior is arguably one of the most important because it is through it that it is possible to estimate the hydropneumatic power and the converter efficiency. Thus, the objective of this work is to evaluate the static pressure behavior within the OWC, using the Piston Methodology, by imposing a monochromatic wave boundary condition in an axisymmetric domain. Among the obtained results it was inferred that the static pressure, in this case, depends directly on the flow acceleration and it is strongly influenced by the vorticity generated in domains with a change of area.
DEVELOPMENT OF A NUMERICAL MODEL FOR THE STUDY OF AN OSCILLATING WATER COLUMN DEVICE CONSIDERING AN IMPULSE TURBINE
Authors: Santos A. L. dos , Isoldi L. A. , Rocha L. A. O. , Gomes M. N. , Viera R. S. , Santos E. D. dos
Published: June 2019

The present work brings a numerical study of an energy conversion device which takes energy from the waves through an oscillating water column (OWC), considering an impulse turbine with rotation in the chimney region through the implementation of a movable mesh model. More precisely, a turbulent, transient and incompressible air flow is numerically simulated in a two-dimensional domain, which mimics an OWC device chamber. The objectives are the verification of the numerical model with movable mesh of the impulse turbine in the free domain from the comparison with the literature and, later, the study of the impulse turbine inserted in the geometry of the OWC device. In order to perform the numerical simulation on the generated domains, the Finite Volume Method (FVM) is used to solve the mass and momentum conservation equations. For the closure of the turbulence, the URANS (Unsteady Reynolds Averaged Navier-Stokes) model k-ω SST is used. To verify the numerical model employed, drag coefficients, lift, torque and power are obtained and compared with studies in the literature. The simulations are performed considering a flow with a Reynolds number of ReD = 867,000, air as the working fluid and a tip speed ratio of λ = 2. For the verification case, coefficients similar to those previously predicted in the literature were obtained. For the case where the OWC device was inserted it was possible to observe an intensification of the field of velocities in the turbine region, which led to an augmentation in the magnitude of all coefficients investigated (drag, lift, torque and power). For the case studied with the tip velocity ratio λ = 2, results indicated that power coefficient was augmented, indicating that the insertion of the turbine in a closed enclosure can benefit the energy conversion in an OWC device.
Implementation of an intelligent clustering methodology for classification of terrorist acts
Authors: Akinyokun Oluwole Charles , Uduak D George
Published: June 2019

Terrorist acts have elevated the level of violence, intimidation and pose a threat to life/property, peace and security in the world today. Deployed solutions to curb the occurrence of terrorism prove to be of insignificant value, hence there is the need for more solutions. The research aims at implementing an intelligent clustering methodology for classification of the acts of terrorism in Nigeria. Three experiments were carried out. In the first experiment, the qualitative terrorists data attributes were converted to quantitative attributes using an existing One-of-N (OoN) method and the processed data supplied to Adaptive Neuro-Fuzzy Inference System (ANFIS) (OoN-ANFIS) for training. The second experiment converted the qualitative data attributes to quantitative attributes using the formulated Rank-Frequency-Based (RFB) model before the data was supplied to ANFIS (RFB-ANFIS) for training. In the third experiment, which constitutes the current study, the RFB-processed data was used by Fuzzy C Means (FCM) to generate initial membership values for each point in the data set and then supplied to ANFIS (RFB-FCMANFIS). The results show that RFB-FCMANFIS model generated the least Root Mean Square Error (RMSE), Mean Absolute Error (MAE), training error and checking error of 0.002887, 0.004598, 0.0000713 and 0.0056155 respectively with the highest correlation coefficient of 0.99954, therefore indicating a superior classification capability using the RFB-FCMANFIS.
Arthrofibrosis of the Knee Joint – the Current State of Knowledge. Literature Review
Authors: Czamara Andrzej , Kuźniecow Mateusz , Królikowska Aleksandra
Published: June 2019

The objective of the paper is to highlight the interdisciplinary problem of arthrofibrosis (AF) and to present this problem from the physiotherapy angle based on a literature review and the authors’ experience. Arthrofi­brosis is a pain­ful condition limiting joint mobility due to pathological fibrosis involving scarring. The limited mobility is often ac­companied by pain. Arthrofibrosis may result in limited locomotion in everyday life or at work and withdrawal from physical activity. In severe cases, Severe AF can lead to patients’ unemployability due to their inability to perform certain work-related activities. The problem is important from the clinical point of view, and therefore treatment of AF involves specialists, physiotherapists and psychologists. Our paper presents the definitions of AF, the most fre­quent causes and epidemiology of the dysfunction. This is followed by a classification of arthrofibrosis. Special attention is paid to problems connected with AF-related terminology. The consequences of the disease, such as pain, inflammation and impairment of joint function, especially joint range of motion limitation, are also presented. The relationship between AF and decreased muscle strength is discussed as well as the ways of muscle strength genera­tion and the issue of limited locomotion in patients with this condition. Some emphasis is given to the role of con­servative and surgical treatment as well as physiotherapy for the prevention or reduction of AF consequences. The next section presents the main guidelines for early physiotherapy. The goal of early physiotherapeutic intervention is to prevent excessive fibrosis within the knee joint and enable safe recovery of joint mobility. The conclusions high­light the need to conduct further research and develop a standard for physiotherapeutic intervention within a com­prehensive evidence-based treatment approach to arthrofibrosis.
Bone Diaphysis Metastases, the Ways and Results of Surgical Treatment Saving the Joints
Authors: Szczerba Piotr , Guzik Grzegorz , Bohatyrewicz Andrzej , Kotrych Daniel
Published: June 2019

Background. A consequence of the progress in oncological treatment is an increasing number of bone complications asso­ciated with metastases. With appropriate choice of oncological treatment and appropriate surgical management, patients may recover their physical function and maintain the previous level of quality of life. Available surgical techniques include intrame­dullary nailing, stabilisation with plates and screws and the use of modular prostheses. Aim of the study: to retrospectively assess the techniques and outcomes of surgical treatment of long bone metastases at the Oncology Orthopaedics Department of the Speciality Hospital in Brzozów, present the possibilities of surgical management and benefits of the chosen method and tentatively choose the most effective approach for restoring function.
Material and methods. Between 2013 and 2017, a total of 82 patients were treated for long bone metastases at the Depart­ment of Oncological Orthopaedics. The most common cancers causing bone metastases were breast cancer (37%), myeloma (16%), lung cancer (8%), kidney (15%), prostate (8%), thyroid 4%, colon 1%, uterus 1%, with other sites accounting for 10%. Pathological fractures were diagnosed in 68 patients. Before the surgical treatment, the patients’ quality of life was assessed using the Karnofsky scale, Bollen prognostic scale, severity of pain in a VAS scale, and MSTS performance scale. Metastasis morpho­logy was evaluated with conventional radiographs, CT and PET-CT. Types of surgery comprised intramedullary nailing, the use of plates and screws and the placement of modular prostheses. Patients were divided into three groups with regard to the stabi­li­sation systems used and another three related to tumour location (humerus, femur or tibia).
Results. Post-operatively, there was a reduction of pain in the VAS scale. Function (MSTS) was best in patients treated with minimally invasive methods and modular prostheses (p <0.05). An improvement in quality of life in the Karnofsky scale was also noted. The complication rate was 7% and was related to wound healing and thromboembolic complications.
Conclusions. 1. Patients with long-bone cancer metastases with pathological fractures or risk of fracture require surgical management. 2. Nailing or modular prosthesis produced the best functional result at 6 weeks post-operatively. 3. All methods of surgical treatment reduced pain and improved the quality of life.
INFLUENCE OF LINEAR FEED DRIVE CONTROLLER SETTING IN CNC TURNING LATHE ON THE STABILITY OF MACHINING
Authors: GRAU Jan , SULITKA Matej , SOUCEK Pavel
Published: June 2019

The paper deals with the influence of linear feed drive controller setting of a CNC turning lathe on the stability of machining. A coupled simulation model of feed drive control and ball screw drive mechanics with
a transmission belt was created and validated by the feed drive diagnostic measurements. The influence of drive control on the overall dynamic compliance at the TCP and the limits of stable depth of cut was examined. Impact of the feed drive actual kinematics configuration on the stability limits was studied as well.
ENERGY-BASED CHARACTERIZATION OF PRECISION HARD MACHINING USING PARTIALLY WORN CBN CUTTING TOOLS
Authors: GRZESIK Wit , DENKENA Berend , ZAK Krzysztof
Published: June 2019

This paper highlights the performance of precision hard turning with CBN cutting tools from energy point-
of-view with additional tool wear effect. For this purpose several wear tests were performed during which the tool nose wear VBC and the corresponding changes of component forces Fc, Ff and Fp were continuously measured. Based on the measured forces and geometrical characteristic of the uncut layer, specific cutting and ploughing energy were determined for several combinations of cutting parameters. Consequently, changes
of energy consumption resulting from tool wear evolution for variable feed rate, depth of cut and tool nose radius were presented.
Nudging: Das Konzept eines liberal paternalism
Authors: Beul Madeleine
Published: June 2019

Just a nudge into the right direction? It is in line with this maxim that the behavioural theory of liberal paternalism - recently met with increasing worldwide attention and approval - suggests to motivate citizens to healthy and sustainable decisions through a “nudge” by the state rather than legal compulsion. The article at hand examines if the use of nudges in German health law is expedient and in accordance with the constitution. In a first step it therefore lays out the fundamentals of the concepts and a second step presents possible examples of application which will then be critically examined.
Poéticas do percurso: o perder-se em Bas Jan Ader
Authors:   Universidade Federal do Rio de Janeiro, Tietz Anelise
Published: June 2019

Este artigo pretende discutir o conceito do perder-se no artista holândes Bas Jan Ader, a partir principalmente da trilogia In Search of the Miraculous. O perder-se seria entendido como uma experiência de lançar-se ao presente e permitir que forças externas definam seu percurso, e portanto, aproximamos Ader com a experiência romântica.
Gioventù: a menina dos olhos de Eliseu Visconti
Authors:   Universidade Federal da Paraíba, Alves Fabíola Cristina
Published: June 2019

Este artigo desenvolve uma leitura estética e um estudo contextual sobre a tela Gioventú (1898) de Eliseu Visconti (1866-1944), acervo Museu Nacional de Belas-Artes do Rio de Janeiro, Brasil. Para contextualizar, pensa-se o contexto vivido pelo artista, a modernidade e sua relação com o movimento simbolista. A leitura estética é discutida a partir de uma noção de beleza e dos modelos artísticos adotados pelo artista. Dessa forma, objetiva-se pensar como a tela Gioventú reflete um sentido moderno de renovação do passado.
Absolutamente outro [Dandismo & Melancolia]
Authors:   Universidade Federal de Minas Gerais, Adverse Angelica Oliveira
Published: June 2019

O propósito desse artigo é pensar como o dandismo pode ser compreendido como uma manifestação de autoficção do artista. Trata-se de analisar a duplicação do ser como expressão do humor melancólico e sintoma do gênio de exceção na modernidade. Pretende-se apresentar como a transfiguração do dândi em obra enseja um intermitente ciclo de autodestruição e criação do si, colocando em questão a finitude da vida e a infinitude da arte.
Forjando narrativas do eu através de registros de si: Amalia Ulman e sua encenação com selfies no Instagram
Authors:   Universidade Federal do Rio de Janeiro, Costa Thiago Lethi
Published: June 2019

O que vemos em uma fotografia corresponde com a realidade? Com a prática das selfies nos últimos anos, foi possível estar mais próximo de uma intimidade tida como verossímil. Todavia, o que vemos pode ser uma encenação do cotidiano através da imagem encenada (POIVERT, 2010) com as especificidades da selfie (TIFENTALE, 2016) frente ao (autor)retrato tradicional moderno. Para exemplificar este fenômeno com as selfies é feita a análise de “Excellences and Perfections” da artista Amalia Ulman que forja uma narrativa de seu cotidiano através de postagens no aplicativo Instagram. O trabalho possibilita elucidar como o (autor)retrato/selfie pode ser ambíguo, colocando em jogo a relação entre “vida real” e o encenado.
Atos Autobiográficos e Práticas Decoloniais em Artes Visuais
Authors:   Universidade Federal de Goiás, Rodrigues Manoela dos Anjos Afonso
Published: June 2019

O projeto de pesquisa “Práticas Artísticas Autobiográficas: intersecções entre artes visuais, escritas de vida e decolonialidade” está em andamento e foi cadastrado em fevereiro de 2017 junto à Pró-Reitoria de Pesquisa e Inovação (PRPI) da Universidade Federal de Goiás (UFG). Ele está situado no campo das práticas artísticas contemporâneas, ancorado na política do lugar e congrega artistas pesquisadoras e pesquisadores para investigar, debater e praticar atos autobiográficos por meio de articulações diversas com os estudos decoloniais. Ao propor arranjos complexos entre autobiografia, escritas de vida, decolonialidade e artes visuais, o projeto busca encontrar possibilidades de criação de lugares de enunciação que, de uma forma ou de outra, tragam as angústias identitárias à luz de uma consciência imigrante para, assim, oferecer condições de enfrentamento do colonialismo interno (RIVERA CUSICANQUI, 2015) e/ou da colonialidade do ser, do saber e do sentir (MIGNOLO, 2014 e 2011).
A recepção italiana de Aby Warburg entre filologia e historiografia da arte. Entrevista à Monica Centanni (IUAV).
Authors:   Università degli Studi della Basilicata, Tonin Thays
Published: June 2019

Das investigações historiográficas de Aby Warburg emergem modos de ver e escrever as artes, operando com o textual e o visual, palavra e imagem, logos e pathos. Suas coordenadas metodológicas voltavam-se ao problema da criação e transmigração das imagens, e seus esforços ambicionavam unir heranças de diversas formas expressivas, diante da busca obsessiva por aquilo que compõe o tecido da memória cultural ocidental(lizada). A partir dos anos 1970, seus estudos tomam nova vitalidade no âmbito teórico-crítico contemporâneo, sendo na Itália a recepção do pensamento de Warburg composta pela concretização de cátedras, centros de estudo e de uma grande produção de publicações por estudiosos de diferentes áreas. Para introduzir brevemente como se dá essa recepção, apresenta-se a seguir a tradução de uma entrevista em italiano com Monica Centanni, expoente pensadora italiana e diretora da Engramma, revista internacional com foco em Aby Warburg e debates correlatos.
Esqueletopia e topografia da artéria celíaca no Lycalopex gymnocercus (Fischer, 1814)
Authors: Leão Neto Leonel Felix , Souza Erick Candiota , Rodriguez Emanoelli Aparecida , Montana Marelise Moral , Carvalho Amarílis Diaz , Junior Paulo Souza
Published: June 2019

O Lycalopex gymnocercus (graxaim-do-campo) é um canídeo silvestre de médio porte que ocorre no cone sul. Tem dieta onívora e habita desde planícies descampadas até matas densas. A artéria celíaca é um dos principais ramos da aorta abdominal e possibilita a irrigação de importantes órgãos, tais como estômago, pâncreas, baço e duodeno. Objetivou-se estudar a topografia da artéria celíaca no L. gymnocercus, com ênfase em características comparativas e aplicadas. Para tal, foram dissecados, mensurados e radiografados 15 cadáveres de L. gymnocercus coletados mortos em rodovias. Foi registrada a posição de origem da artéria celíaca na aorta e sua esqueletopia em relação às vertebras. Também foi mensurada a distância entre as artérias celíaca e mesentérica cranial e verificada a correlação entre esta distância e o comprimento rostro-sacral dos espécimes, bem como a existência de diferenças nesta distância entre os sexos. Em 67% dos casos, a artéria celíaca foi o primeiro ramo visceral da aorta abdominal, emergindo caudalmente ao hiato aórtico. Em 33%, a artéria celíaca originou-se cranialmente ao hiato aórtico, caracterizando uma origem torácica. Apresentou uma distância média da artéria mesentérica cranial de 6,66 ± 1,85 mm, com valores mínimos e máximos de 4,63 e 10,83 mm respectivamente. Sua esqueletopia predominante foi ao nível da segunda vértebra lombar (L2), variando cranialmente até a primeira (L1). Houve correlação positiva moderada (r = 0,52) entre as distâncias das artérias celíaca e mesentérica cranial com o comprimento rostro-sacral dos indivíduos. Não houve diferença na distância entre as artérias quando comparados os sexos. O percentual elevado de indivíduos com origem da artéria celíaca cranialmente ao diafragma e a esqueletopia ao nível da segunda vértebra lombar foram as principais diferenças encontradas em relação aos carnívoros domésticos e pode ter implicação em medicina de animais silvestres.
JOSIP VANCAŠ AND HIS ARCHITECTURE IN BANJA LUKA
Authors: Malinović Miroslav , Vidaković Siniša
Published: June 2019

This paper deals with the architecture of the most prominent architect in Bosnia and Herzegovina during the Austro-Hungarian time, Josip Vancaš, and two of his most appreciated designs developed for Banja Luka: Landesbank branch office and villa Husedžinović. They both belong to what Vancaš promoted to be "Bosnian style" in architecture, while the latter one is widely accepted as one of his best single-family housing designs. The paper foremost shows Vancaš's biography and a short overview of his professional development and then focuses on the discussion of his contribution to the so-called Bosnian style in architecture, and its reflections to mentioned designs in Banja Luka, originally contributing to this still active question in the history of architecture.The paper gives data on the original status of the buildings, as well as their development throughout history, with reflections to contemporary time. The concluding discussion reviews Vancaš's contribution to architecture in the period of 1878-1918, as well as the promotion of new thoughts outside the usual work of a typical architect.
La Psychanalyse, Otage de ses Organisations?
Authors: Allen David F.
Published: June 2019

This well written research by Robert Samacher has several important functions: It shows how and why so many well-meaning post-Freudians strayed away from Freud and fell for simplification. This turning away from Freud (ego-psychology) explains Lacan’s return to Freud. La Psychanalyse, Otage de ses Organisations?: Du Contre-Transfert au Désir D’Analyste is organized as follows: Part 1—The transmission of psychoanalysis in analytic institutions from Freud to today—includes four chapters. Chapter 1 is entitled The Birth of the Freudian Movement. Chapter 2 is called Psychoanalytic organizations and institutions in France after 1945 and it includes a detailed study of the École Freudienne founded by Solange Faladé. Chapter 3 focuses on Training analysis and the Pass, and Chapter 4 Cartels deals with the problem of identification in institutions, the question of the Plus ONE and Solange Faladé’s place in the wake of Lacan.
Jan-Erik Johansson - en forskare som vill göra skillnad
Authors: Pramling Samuelsson Ingrid
Published: June 2019

Denna korta artikel tillägnas en av den akademiska världens nordiska forskare som har arbetat för att göra skillnad. Idag talas det mycket om att akademiker är upptagna av sin egen karriär och lägger all kraft på att publicera, men Jan-Erik hör till dem som mer har brunnit för ett fält och velat göra något bra för detta – och hans fält är det förskolepedagogiska – vilket vi varmt applåderar
Undergraduate Students Willingness to Pay for Social Services of Trees at the Federal University of Agriculture Makurdi, Benue State, Nigeria
Authors: Ancha P. U. , Ikyaagba E. T. , Nongov T. T.
Published: June 2019

The study was conducted to provide information on students Willingness to Pay (WTP) for social services provided by tree species on the campus of the Federal University of Agriculture Makurdi (FUAM), Benue State, Nigeria. Random sampling technique was used to select 200 students from 10 Departments of the University. The semi-structured questionnaire was used to obtain data from the students. Vegetation survey was conducted to indentified tree species present in the selected colleges. The result of the study shows that Albizia zygia was the dominant tree species on the campus. Majority of the students (86.5%) were willing to pay (WTP) for social services of the tree species while (23.5%) were not WTP. Provision of shade (WMS= 4.19>3.00) and beautification (WMS=3.64>3.00) were the most social services provided by tree species. The mean amount the students were WTP for social tree services was N46 per month. Sex of the students differed significantly (P<0.05) from their WTP for the trees social services. Also, there was a significant difference (P<0.10) between the students level of study and their willingness to pay for the trees social services. The major reasons responsible for the insufficiency of trees on the campus as stated by the students were clearance for construction purposes (WMS4.15>3.00) and bush burning (WMS=3.62>3.00). It was recommended that harnessing of human, financial and material resources to address issues of sustainability of forest goods and services on the campus of FUAM should be prioritized. School administration, Departmental Staff and students should promote tree planting on campus.
Effects of Thioxanthene Containing Anti-Psychotic and Anti-Platelet Drug Combination on Mean Platelet Volume and Platelet Distribution Width in Rats
Authors: Bashir Muhammad Irfan , Saleem Uzma , Anwer Fareeha , Ahmad Bashir
Published: June 2019

Aim: To evaluate the combined and individual effects of thioxanthene containing antipsychotic and anti-platlet drug on Mean Platelet Volume (MPV) and Platelet Distribution Width (PDW) in rats.

Methods: This investigational study comprised of 100 albino rats of both sexual orientation, they were of 300 g to 350 g. We got ten groups, in which each group consisted of 10 rats (n=10).Ozagrel was used as anti-platelet and Zuclopenthixol was used as thioxanthene containing antipsychotic. Rats were treated with defined doses of Ozagrel and thioxanthene containing anti-psychotic (Zuclopenthixol) alone and in joined for three weeks (21 days). Blood test at 0, seventh, fourteenth and last day of study were taken. Mean Platelet Volume and Platelet Distribution Width were estimated from blood tests by using standard research center procedure. Results were accumulated and abridged by applying statistics. Correlation was framed between all days incentive to zero day values.

Results: Anti-psychotic drug and antiplatelet drug both showed decrease in MPV with both doses highly significantly (p < 0.001) decrease associated with maximum doses alone and with combination group. In case of PDW all individual and minimum combination group showed increase in PDW values but significantly (p < 0.001) increase in maximum combination groups.

Conclusion: Combination of both drugs can cause more decrease in MPV as compare to the individual and in case of PDW combination with maximum doses may cause decrease in values by opposing the results individual therapy. It indicated any Drug-Drug interaction between these two drugs regarding Mean platelet volume and Platelet distribution width.
Negative regulation of miR‐1275 by H3K27me3 is critical for glial induction of glioblastoma cells
Authors: Mai Jialuo , Gu Jiayu , Liu Ying , Liu Xincheng , Sai Ke , Chen Zhijie , Lu Wanjun , Yang Xiaozhi , Wang Jingyi , Guo Cui , Sun Shuxin , Xing Fan , Sheng Longxiang , Lu Bingzheng , Zhu Zhu , Sun Hongjiaqi , Xue Dongdong , Lin Yuan , Cai Jing , Tan Yaqian , Li Chuntao , Yin Wei , Cao Lin , Ou‐yang Ying , Qiu Pengxin , Su Xingwen , Yan Guangmei , Liang Jiankai , Zhu Wenbo
Published: June 2019

Activation of the cyclic adenosine monophosphate/protein kinase A (cAMP/PKA) pathway induces glial differentiation of glioblastoma (GBM) cells, but the mechanism by which microRNA (miRNA) regulate this process remains poorly understood. In this study, by performing miRNA genomics and loss‐ and gain‐of‐function assays in dibutyryl‐cAMP‐treated GBM cells, we identified a critical negative regulator, hsa‐miR‐1275, that modulates a set of genes involved in cancer progression, stem cell maintenance, and cell maturation and differentiation. Additionally, we confirmed that miR‐1275 directly and negatively regulates the protein expression of glial fibrillary acidic protein (GFAP), a marker of mature astrocytes. Of note, tri‐methyl‐histone H3 (Lys27) (H3K27me3), downstream of the PKA/polycomb repressive complex 2 (PRC2) pathway, accounts for the downregulation of miR‐1275. Furthermore, decreased miR‐1275 expression and induction of GFAP expression were also observed in dibutyryl‐cAMP‐treated primary cultured GBM cells. In a patient‐derived glioma stem cell tumor model, a cAMP elevator and an inhibitor of H3K27me3 methyltransferase inhibited tumor growth, induced differentiation, and reduced expression of miR‐1275. In summary, our study shows that epigenetic inhibition of miR‐1275 by the cAMP/PKA/PRC2/H3K27me3 pathway mediates glial induction of GBM cells, providing a new mechanism and novel targets for differentiation‐inducing therapy.
Retracted: Consistency analysis of microRNA‐arm expression reveals microRNA‐369‐5p/3p as tumor suppressors in gastric cancer
Authors: Dong Lei , Zhang Zhengyi , Xu Jiayue , Wang Fang , Ma Yanni , Li Feng , Shen Chao , Liu Ziwen , Zhang Junwu , Liu Changzheng , Yi Ping , Yu Jia
Published: June 2019

The 5p and 3p arms of microRNA (miRNA) are typically generated from the same precursor, and one arm influences protein output, while the other has a short half‐life. However, a few miR‐5p/3p pairs have been reported to co‐exist in cancer cells. Here, we performed a genome‐wide analysis of miRNA expression in gastric cancer (GC) cells to systematically investigate the co‐expression profile of miR‐5p/3p in gastric tumorigenesis. We discovered that only 41 miR‐5p/3p pairs out of 1749 analyzed miRNA were co‐expressed. Specifically, abnormal expression of miR‐369‐5p and miR‐369‐3p was correlated with GC progression. Importantly, both in vitro and in vivo assays revealed that miR‐369‐5p and miR‐369‐3p exhibited tumor‐suppressive roles by regulating jun proto‐oncogene and v‐akt murine thymoma viral oncogene homolog 1 function in GC cells, respectively. Moreover, we observed that miR‐369 was inactivated in GC tissues due to DNA methylation. We also showed that inhibition of miR‐369‐5p/3p attenuated the effect of azacitidine (AZA) treatment on suppressing cell growth and invasion. These results suggest that the therapeutic efficacy of AZA in GC is at least partly attributable to miR‐369 activation. Overall, our findings provide convincing evidence that both the 5p and 3p arms of miRNA co‐expressed in GC and DNA methylation‐induced miR‐369 signaling contribute to GC progression.
Magnetically Addressable Shape‐Memory and Stiffening in a Composite Elastomer
Authors: Testa Paolo , Style Robert W. , Cui Jizhai , Donnelly Claire , Borisova Elena , Derlet Peter M. , Dufresne Eric R. , Heyderman Laura J.
Published: June 2019

With a specific stimulus, shape‐memory materials can assume a temporary shape and subsequently recover their original shape, a functionality that renders them relevant for applications in fields such as biomedicine, aerospace, and wearable electronics. Shape‐memory in polymers and composites is usually achieved by exploiting a thermal transition to program a temporary shape and subsequently recover the original shape. This may be problematic for heat‐sensitive environments, and when rapid and uniform heating is required. In this work, a soft magnetic shape‐memory composite is produced by encasing liquid droplets of magneto‐rheological fluid into a poly(dimethylsiloxane) matrix. Under the influence of a magnetic field, this material undergoes an exceptional stiffening transition, with an almost 30‐fold increase in shear modulus. Exploiting this transition, fast and fully reversible magnetic shape‐memory is demonstrated in three ways, by embossing, by simple shear, and by unconstrained 3D deformation. Using advanced synchrotron X‐ray tomography techniques, the internal structure of the material is revealed, which can be correlated with the composite stiffening and shape‐memory mechanism. This material concept, based on a simple emulsion process, can be extended to different fluids and elastomers, and can be manufactured with a wide range of methods.
Organic Electrochemical Transistors: Smart Devices for Real‐Time Monitoring of Cellular Vitality
Authors: Decataldo Francesco , Barbalinardo Marianna , Tessarolo Marta , Vurro Vito , Calienni Maria , Gentili Denis , Valle Francesco , Cavallini Massimiliano , Fraboni Beatrice
Published: June 2019

Current technologies to monitor formation and disruption in in vitro cell cultures are based either on optical techniques or on electrical impedance/resistance measurement, which often rely on cumbersome and time‐consuming measurements and data analyses. In this paper, poly(3,4‐ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS)‐based organic electrochemical transistors (OECTs) are proposed with channel areas specifically designed and dimensioned as fast and real‐time monitoring devices for a large variety of cell lines, with a broad range of tissue resistance. In particular, it is investigated how and why two device configurations provide a different response to leaky‐barrier (NIH‐3T3) and strong‐barrier (CaCo‐2) cell lines growth and detachment, achieving a continuous monitoring also for leaky‐barrier cell layer growth and detachment. Data are collected using the transistor dynamic behavior to a DC potential pulse on the gate, providing an excellent time resolution and thus enhancing the amount of information that can be collected for fast biological processes (<5 s).
Bismutverbindungen in der Radikalkatalyse: Übergangsmetallbismutane ermöglichen thermisch induzierte Cycloisomerisierungen
Authors: Ramler Jacqueline , Krummenacher Ivo , Lichtenberg Crispin
Published: June 2019

Der Einsatz von Bismutverbindungen in kontrollierten Radikalreaktionen steckt noch in den Kinderschuhen. Neue Entwicklungen werden durch die Eigenschaften dieser Komplexe vorangetrieben, die für Anwendungen in der Synthesechemie hochattraktiv sind (z. B. niedrige Toxizität, hohe Toleranz gegenüber funktionellen Gruppen, niedrige homolytische Bindungsdissoziationsenergien und reversible homolytische Bindungsdissoziationen). Hier berichten wir über die erste katalytische Anwendung von Übergangsmetallbismutanen (d. h. Verbindungen mit einer Bi‐ÜM‐Bindung; ÜM=Übergangsmetall). In der katalysierten radikalischen Cycloisomerisierung von δ‐Iodolefinen als Modellreaktion werden Eigenschaften sichtbar, die im Vergleich zu bekannten B‐, Mn‐, Cu‐, Zn‐, Sn‐ und Alkalimetallreagenzien komplementär oder überlegen sind (einschließlich eines anderen entscheidenden Zwischenprodukts). Somit werden Übergangsmetallbismutane als neue Klasse von (Prä‐)Katalysatoren für kontrollierte Radikalreaktionen eingeführt.
Carbon Dots as a New Class of Diamagnetic Chemical Exchange Saturation Transfer (diaCEST) MRI Contrast Agents
Authors: Zhang Jia , Yuan Yue , Gao Minling , Han Zheng , Chu Chengyan , Li Yuguo , van Zijl Peter C. M. , Ying Mingyao , Bulte Jeff W. M. , Liu Guanshu
Published: June 2019

While carbon dots (C‐dots) have been extensively investigated pertaining to their fluorescent, phosphorescent, electrochemiluminescent, optoelectronic, and catalytic features, their inherent chemical exchange saturation transfer magnetic resonance imaging (CEST MRI) properties are unknown. By virtue of their hydrophilicity and abundant exchangeable protons of hydroxyl, amine, and amide anchored on the surface, we report here that C‐dots can be adapted as effective diamagnetic CEST (diaCEST) MRI contrast agents. As a proof‐of‐concept demonstration, human glioma cells were labeled with liposomes with or without encapsulated C‐dots and implanted in mouse brain. In vivo CEST MRI was able to clearly differentiate labeled cells from non‐labeled cells. The present findings may encourage new applications of C‐dots for in vivo imaging in deep tissues, which is currently not possible using conventional fluorescent (near‐infrared) C‐dots.
Fulminating Gold and Silver
Authors: Wentrup Curt
Published: June 2019

This Essay deals with the fascinating and highly explosive compounds fulminating gold and fulminating silver, which are easily made by treatment of gold dissolved in aqua regia with ammonia, and by reaction of silver oxide or silver salts with ammonia, respectively. Fulminating gold in particular captivated the alchemists in the 16th to 18th centuries. Numerous preparations were described, as well as numerous attempts to make volatile, sublimable or distillable gold, and to use the products so obtained (which were most likely gold chlorides) to make the sought‐after tincture, which would “heal” the “impure” metals and transform them into gold, and equally be a panacea to cure all human illnesses.
Synergistic effect between zeolitic imidazolate framework‐8 and expandable graphite to improve the flame retardancy and smoke suppression of polyurethane elastomer
Authors: Wang Guisong , Xu Wenzong , Chen Rui , Li Wu , Liu Yucheng , Yang Kai
Published: June 2019

Zeolitic imidazolate framework‐8 (ZIF‐8) was synthesized at room temperature, and then added with expandable graphite (EG) to polyurethane elastomer (PUE) to study their flame retardancy and smoke suppression of PUE. The results showed that when the total flame retardant was 3 wt % and the ratio of ZIF‐8 and EG was 1:3, it had the best effect on the flame retardancy and smoke suppression of PUE. Compared with pure PUE, the peak heat release rate, the total heat release, and the maximum smoke density values of Z1E3 decreased by 83.4, 42.6, and 22.4%, respectively. Moreover, the limited oxygen index value of Z1E3 increased to 30.2% and its UL‐94 vertical burning test reached V‐1 rating. This was because ZIF‐8 synergized with EG to make the intumescent char layer compact, resulting in improved flame retardancy and smoke suppression of PUE. The specific mechanism of flame retardancy and smoke suppression is also discussed in this article. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020, 137, 48048.
Conducting Comprehensive Assessment Within Community Colleges: Administrative, Educational, and Student Support (AES) Assessment with the Shults Dorimé‐Williams Taxonomy
Authors: Dorimé‐Williams Marjorie L. , Shults Christopher
Published: June 2019

This chapter introduces the Borough of Manhattan Community College's Institutional Effectiveness Assessment Plan and the Shults Dorimé‐Williams Taxonomy as resources for the enhancement of assessment within administrative, educational, and student support units.
Polymers of Intrinsic Microporosity in Triphasic Electrochemistry: Perspectives
Authors: Marken Frank , Madrid Elena , Zhao Yuanzhu , Carta Mariolino , McKeown Neil B.
Published: June 2019

Polymers of intrinsic microporosity (PIMs) as molecularly rigid polymers have emerged as a new class of gas‐permeable glassy materials. They offer excellent processability and a range of potential applications also in electrochemical processes. Particularly interesting is the ability of some PIM films to remain gas‐permeable/binding even in the presence of (aqueous) liquid electrolyte to give triphasic interfacial reactivity. Gaseous reagents or products (such as hydrogen or oxygen) are bound probably into hydrophobic regions in the wet PIM film to avoid macroscopic bubble formation and to enhance both the surface reactivity and the apparent activity of the gas solute close to the electrode/catalyst surface. The photoelectrochemical formation of hydrogen gas close to a platinum electrode is enhanced by PIM‐1, which is presented as an example of energy harvesting through molecular H2 “energy carrier” transport.
Survey on the Mechanical Properties of Lamellar Ag‐MXA Supercluster Architectures
Authors: Qin Xiaoyun , Li Ailin , Liu Keyan , Xue Zhenjie , Song Qian , Qin Xiaomei , Wang Tie
Published: June 2019

Lamellar nanomaterials with specific architectures and novel properties have received increasing attention from both scientific and technological fields in recent years because of their potential applications in catalysis, energy conversion, and storage devices. Bulk supercluster pellets with well‐defined lamellar structures were fabricated by assembling silver clusters and mercaptoalkyl acids (MXA) to investigate the mechanical properties. The relationship between the assembled structure and pressure resistance was surveyed for the first time. The enhanced interlayer interactions were found to increase the elastic modulus of the Ag‐MXA supercluster architectures.
Recent Contributions to the Coordination Chemistry of Beryllium
Authors: Buchner Magnus R.
Published: June 2019

Given the alleged extreme toxicity of beryllium and its compounds, it is the least investigated nonradioactive element. However, beryllium exhibits unique properties among the elements and therefore the related coordination chemistry is unprecedented. With the emergence of s‐block catalysis and the introduction of low‐valent magnesium complexes as versatile reducing agents, the interest in related beryllium compounds also has increased. Therefore, some quite remarkable progress on the coordination and organometallic chemistry of beryllium has been made in the last two decades. This Minireview article gives an oversight over the relatively recent developments in this field of beryllium research. An emphasis is placed on the correlation between the structure and reactivity of the described compounds.
Mechanistic Insights into Statistical Co‐Assembly of Metal Complexes
Authors: Coelho Joao Paulo , Matern Jonas , Albuquerque Rodrigo Q. , Fernández Gustavo
Published: June 2019

Invited for the cover of this issue is the group of Gustavo Fernández at the Westfälische Wilhelms‐Universität Münster. The image depicts the two‐step cooperative cooling curve obtained during the co‐assembly process of the equimolar mixture of the target PdII and PtII complexes superimposed on the Sugarloaf mountain from one of the most photographed spots in Brazil. Read the full text of the article at 10.1002/chem.201900604.
A Methodology for Identifying Phenomenological‐Based Models using a Parameter Hierarchy
Authors: Lopez‐Restrepo Santiago , Garcia‐Tirado Jose , Alvarez Hernan
Published: June 2019

In this study, a methodology for parametric identification of phenomenological based semiphysical models (PBSMs) is presented. The proposed methodology relies on a hierarchy of the relevance of parameters with respect to the model outputs. This hierarchy is accomplished by means of the Hankel matrix of the process model and its singular value decomposition (SVD). In this way, parameters having a major impact on the process output are prioritized. Two concepts, parameter interpretability and sacrifice parameter, are coined to be used in such a methodology. The proposed scheme is tested in simulation by using two realistic examples, both selected as batch processes due to their inherent difficulty: ‐endotoxins production by means of Bacillus thuringiensis and the production of polyhydroxyalkanoates (PHA). Our results show a reduction of 92 % and 39 % in the integral of time‐weighted absolute error (ITAE), in the first and second examples, respectively, with respect to a conventional identification procedure.