bluuebunny/crossref_metadata_2025 huggingface dataset:
Opening a turtle graveyard: Size distribution of dead individuals of Phrynops geoffroanus (Pleurodira, Chelidae)
Authors: Rodrigues João Fabrício Mota , Friol Natália Rizzo , Silva Wagnar C. , Demondes Erica , Pinto Antonio Millas , Fernandes-Ferreira Hugo
Published: May 2019

Aquatic animals, such as freshwater turtles, are much dependent on the water bodies where they live. Here we describe the size distribution of a population of Phrynopsgeoffroanus complex that died after the total drought of the artificial water reservoir where it lived in Caatinga. Amongst the 438 animals we found dead in the Cedro water reservoir, we measured the maximum carapace length of 72 individuals. The population was mainly composed of adult individuals and dead turtles measured in areas that kept water for longer were larger than animals from areas that dried up early.
Context-Aware Prediction Model for Offloading Mobile Application Tasks to Mobile Cloud Environments
Authors: Jadad Hamid A , Touzene Abederezak , Day Khaled , Alziedi Nasser , Arafeh Bassel
Published: May 2019

Offloading intensive computation parts of the mobile application code to the cloud computing is a promising way to enhance the performance of the mobile device and save the battery consumption. Recent works on mobile cloud computing mainly focus on making a decision of which parts of application may be executed remotely, assuming that mobile and server processors have no other loads, mobile battery always full of charge, and have static network bandwidth. However, the mobile cloud environment parameters changes continuously. In this paper, the authors propose a new offloading approach which uses cost models to decide at runtime either to offload execution of the code to the remote cloud or not. This article considers the dynamic changes of the mobile cloud environment in the system cost models. Moreover, this article enhances the offloading process by considering parallel execution of application independent tasks in the cloud. The evaluation results show that the approach reduces the execution time and battery consumption by 75% and 55%, respectively, compared with existing offloading approaches.
Dynamic Load Balancing Using Hybrid Approach
Authors: Gond Sunita , Singh Shailendra
Published: May 2019

Load balancing in a cloud environment for handling multiple process of different size is an important issue. Many advanced technologies are incorporated in the processes-based resource allocation which enhances the system efficiency. The steps of allotting resources to process can be done by taking data which helps to analyze and make important decisions at runtime. This article focuses on the allocation of cloud resources where two models were developed, the first was TLBO (Teacher Learning Based Optimization), a genetic algorithm which finds the correct position for the process to execute. Here, some information used for analysis was total number of machines, memory, execution time, etc. So, the output of the TLBO process sequence was used as training input for the Error Back Propagation Neural Network for learning. This trained neural network improved the work job sequence quality. Training was done in such a way that all sets of features were utilized to pair with their process requirement and current position. For increasing the reliability of the work, an experiment was done on a real dataset. Results show that the proposed model has overcome various evaluation parameters on a different scale as compared to previous approaches adopted by researchers.
Fabrication and Characterization of Particle Board from Coffee Husk Waste
Authors: Nuamsrinuan Nisakorn , Naemchanthara Patcharin , Limsuwan Pichet , Naemchanthara Kittisakchai
Published: May 2019

The purpose of this research was to fabricate the particle board from the coffee husk. The coffee husk from Chumphon province of Thailand was collected, prepared and separated into four groups such as outer husk, inner husk, the mixture of inner and outer husk and husk from the milling process. The coffee husk particle sheet was formed by the compression molding with the heater. Then the coffee husk particle sheets were the mechanical properties testing. The results showed the coffee husk particle sheet from milling process pass the Thai industrial standard (TIS.876/2547). However, the results of swelling and water absorption indicated that all the coffee husk sheet were not passed the TIS.876/2547. The effect of coffee husk particle size on mechanical properties was clarified. The coffee husk particle sheet from the particle size of 2, 4 and 6 mm was mechanical testing and follow TIS.876/2547. The coffee particle size of 2 mm showed the passing the standard. Moreover, the effect of isocyanate adhesive on mechanical properties was investigated. The weight percentage range of isocyanate adhesive on coffee husk from 7 to 13 %wt was carried out. The weight percentage of 9, 11 and 13 showed according to TIS.876/2547. From the experiment indicated that the coffee husk could be applied to the wood particle board industrial.
Utilizing Agricultural Waste as an Environmentally Friendly Cement Composite
Authors: Boonyaroj Varinthorn , Saramanus Sirichai
Published: May 2019

Utilizing coconut coir fiber can offer an alternative method of adding value to agricultural wastes and help to conserve the environment with green products. The aim of this research was to investigate the potential use of coconut coir fiber as an eco-friendly material for cement composites. The properties of these cement composites mixed with varying proportions of paper waste were compared to ordinary white Portland cement. In addition, the surface structure and chemical characteristics of the samples were examined with a scanning electron microscope (SEM) and an energy-dispersive x-ray spectrometer (EDS). The results showed that the cement composites consisted mainly of the elements carbon (C), oxygen (O), and calcium (Ca) in the range of 34-44%, 42-49%, and 11-19% by weight, respectively. The density of OPC, 0%, 50%, 100% of coconut coir fiber cement composite at 28 days curing time were found 1.85±0.03 g/cm3,1.72±0.02 g/cm3, 1.66±0.05 g/cm3, 1.56±0.02 g/cm3, respectively. Moreover, the compressive and flexural strength of the cement composites decreased with an increase in the coconut coir fiber volume fraction.
Phytochemistry and Antioxidant Activity of Molineria latifolia Herb. Extracts
Authors: Akkarasiritharattana Kunthasaya , Chamutpong Siriphatr
Published: May 2019

Molineria latifolia is a perennial-monocotyle-donous herb and it is well-known in the treatment of melasma, freckle and black spot in Thai traditional medicine. The purpose of this study was to determine the phytochemicals and antioxidant activity in the aerial parts and the underground parts of M. latifolia by water, ethanolic and ethyl acetate extracts. The phytochemicals were analyzed by HPTLC. The antioxidant activity was measured by using the DPPH radical scavenging activity assay, Ferric reducing antioxidant power assay and Total phenolic content was measured by Folin‑Ciocalteu. The result showed the highest antioxidant activity of the underground parts (RW) were extracted by water at EC50=245.03±6.59 µg/mL(DPPH) and 640.03±0.36 Fe2+/ mg (FRAP). Consequently, the highest phenolics content was found in the water extract of the aerial parts (LW) (191.70±1.64 µg FA/mg). M. latifolia extracts contain a bioactive compound of Tannin, Flavonoids and Steroid . Tannin and Flavonoid were found in both of parts. In the aerial parts were found steroid extracting by ethyl acetate and ethanolic, as the underground parts were seen steroid extracting by water. It was found that M. latifolia has high bioactive compounds and moderate antioxidant activity. These results for the cosmetic product development in the future.
The Effect of Leucite Ceramics on Mechanical Properties of Silicone Coating
Authors: Tharajak Jirasak , Sanpo Noppakun
Published: May 2019

Silicone based coating was considered a high performance coatings used to preserve or protect a variety of different materials. However, its mechanical property was a weakness for using in several applications. In this research study, leucite ceramic particles were added to silicone coating in order to improve some mechanical properties. Leucite ceramic particles were synthesized by in-house sol-gel process. The morphology and size of our synthesized leucite particles were analyzed by SEM and XRD, respectively. It was revealed that the concentration and size of leucite ceramic particles played the important role on several properties of silicone coating.
Widespread Tau-Specific CD4 T Cell Reactivity in the General Population
Authors: Lindestam Arlehamn Cecilia S. , Pham John , Alcalay Roy N. , Frazier April , Shorr Evan , Carpenter Chelsea , Sidney John , Dhanwani Rekha , Agin-Liebes Julian , Garretti Francesca , Amara Amy W. , Standaert David G. , Phillips Elizabeth J. , Mallal Simon A. , Peters Bjoern , Sulzer David , Sette Alessandro
Published: May 2019

Tau protein is found to be aggregated and hyperphosphorylated (p-tau) in many neurologic disorders, including Parkinson disease (PD) and related parkinsonisms, Alzheimer disease, traumatic brain injury, and even in normal aging. Although not known to produce autoimmune responses, we hypothesized that the appearance of aggregated tau and p-tau with disease could activate the immune system. We thus compared T cell responses to tau and p-tau–derived peptides between PD patients, age-matched healthy controls, and young healthy controls (<35 y old; who are less likely to have high levels of tau aggregates). All groups exhibited CD4+ T cell responses to tau-derived peptides, which were associated with secretion of IFN-γ, IL-5, and/or IL-4. The PD and control participants exhibited a similar magnitude and breadth of responses. Some tau-derived epitopes, consisting of both unmodified and p-tau residues, were more highly represented in PD participants. These results were verified in an independent set of PD and control donors (either age-matched or young controls). Thus, T cells recognizing tau epitopes escape central and peripheral tolerance in relatively high numbers, and the magnitude and nature of these responses are not modulated by age or PD disease.
CD25 and Protein Phosphatase 2A Cooperate to Enhance IL-2R Signaling in Human Regulatory T Cells
Authors: Ding Ying , Yu Aixin , Tsokos George C. , Malek Thomas R.
Published: May 2019

Low-dose IL-2 therapy is a direct approach to boost regulatory T cells (Tregs) and promote immune tolerance in autoimmune patients. However, the mechanisms responsible for selective response of Tregs to low-dose IL-2 is not fully understood. In this study we directly assessed the contribution of CD25 and protein phosphatase 2A (PP2A) in promoting IL-2R signaling in Tregs. IL-2–induced tyrosine phosphorylation of STAT5 (pSTAT5) was proportional to CD25 levels on human CD4+ T cells and YT human NK cell line, directly demonstrating that CD25 promotes IL-2R signaling. Overexpression of the PP2A catalytic subunit (PP2Ac) by lentiviral transduction in human Tregs increased the level of IL-2R subunits and promoted tyrosine phosphorylation of Jak3 and STAT5. Interestingly, increased expression of CD25 only partially accounted for this enhanced activation of pSTAT5, indicating that PP2A promotes IL-2R signaling through multiple mechanisms. Consistent with these findings, knockdown of PP2Ac in human Tregs and impaired PP2Ac activity in mouse Tregs significantly reduced IL-2–dependent STAT5 activation. In contrast, overexpression or knockdown of PP2Ac in human T effector cells did not affect IL-2–dependent pSTAT5 activation. Overexpression of PP2Ac in human Tregs also increased the expressions of proteins related to survival, activation, and immunosuppressive function, and upregulated several IL-2–regulated genes. Collectively, these findings suggest that CD25 and PP2A cooperatively enhance the responsiveness of Tregs to IL-2, which provide potential therapeutic targets for low-dose IL-2 therapy.
Current updates on idiopathic normal pressure hydrocephalus
Authors: Liew Boon , Takagi Kiyoshi , Kato Yoko , Duvuru Shyam , Thanapal Sengottuvel , Mangaleswaran Balamurugan
Published: May 2019

Idiopathic normal pressure hydrocephalus (iNPH) is one of the neurodegenerative diseases which can be treated surgically with favorable outcome. The gait disturbance, cognitive, and urinary symptoms are known as the clinical triad of iNPH. In this review, we have addressed the comorbidities, differential diagnoses, clinical presentations, and pathology of iNPH. We have also summarized the imaging studies and clinical procedures used for the diagnosis of iNPH. The treatment modality, outcomes, and prognosis were also discussed.
Spontaneous resolution of brain abscess by rupture into middle ear
Authors: Agrawal Mohit , Phalak Manoj , Panda Smriti , Kale Shashank
Published: May 2019

Intracranial abscesses are uncommon, serious, and life-threatening infections, with mortality rate of about 15%. Surgical treatment is warranted for an abscess size more than 2.5 cm. We present an unusual case with spontaneous resolution of a large abscess through the middle ear without any surgical intervention.
Netflix and L2 learning: A case study
Authors: Dizon Gilbert
Published: May 2019

The evolving video viewing habits of consumers combined with advances in mobile technology have resulted in the growth of video on demand (VOD) services. While these video streaming services potentially offer several benefits for L2 learners, little is known about them in the context of language learning. Thus, this study fills this gap in the literature by examining EFL students’ views of Netflix, the leading provider of subscription VOD. The study also investigates the extent to which EFL learners use Netflix for L2 learning and the means by which they access the service. Nine Japanese EFL students participated in the study and were given three months to use Netflix. The participants were then interviewed to obtain their opinions of the video streaming service. Four themes were extracted from the interview data: (1) enhanced learning effectiveness, (2) increased L2 motivation, (3) better access to L2 knowledge, and (4) hindered convenience. It was also found that the learners watched primarily through mobiles devices rather than PCs, and viewed more L2 titles than L1 programming. These results illustrate that subscription VOD has the potential to foster L2 learning and underscore the necessity for more research into their use for language learning.
Uma discussão sobre a formação de Professores promovida por um IES federal por meio da “Complementação Pedagógica para Não Licenciados”: o caso do professor de Física
Authors: Caldatto Marlova Estela , Neves da Silva João Ricardo
Published: May 2019

O presente artigo se propõe a analisar o projeto (currículo) de formação inicial de professores de Física que baliza a implementação da política pública “Formação pedagógica para graduados não licenciados” em andamento em uma universidade pública da esfera federal. As análises buscaram categorizar e discutir os conhecimentos que compõem tal projeto formativo a partir das prescrições previstas nos documentos jurídicos vigentes e da seguinte taxonomia: conhecimento do conteúdo (Física), do conhecimento pedagógico geral e do conhecimento pedagógico do conteúdo (Física). As análises mostram uma discrepância entre os conhecimentos desenvolvidos na complementação pedagógica e os conhecimentos tidos pela literatura como necessários para a prática do professor de Física, mesmo quando consideradas as formações prévias (primeiras graduações) dos alunos.
Uma proposta de baixo custo para experimentos com raios catódicos
Authors: Neves Defferson Rodrigues Martins das , Pereira Bianca Alves , Pereira Sabrina Alves , Forato Thaís Cyrino de Mello , Bianco André Amaral Gonçalves
Published: May 2019

Este trabalho apresenta uma proposta de adaptação de um dos experimentos sobre a natureza dos raios catódicos realizado ao final do século XIX, especificamente, aquele apresentado em livros didáticos e de divulgação científica como “o experimento de Thomson” para o cálculo da relação carga/massa do elétron. Nossa proposta utiliza materiais com custos inferiores aos de kits de experimentos disponíveis no mercado internacional e apresenta uma descrição pormenorizada da sua construção e operação, concorrendo, em vários aspectos, como solução para alguns dos motivos relacionados à pouca utilização dos experimentos nas aulas de ciências: o custo elevado dos materiais e dos equipamentos, a falta de laboratórios e a falta de habilidade dos professores. A elaboração do aparato experimental é ainda acompanhada do desenvolvimento matemático necessário à sua utilização e da indicação dos vários fenômenos físicos que podem ser tratados paralelamente à sua implementação. Com a adaptação experimental, fomos capazes de medir e calcular o campo magnético a que os elétrons são submetidos no interior de um tubo de raios catódicos, a diferença de potencial entre catodo e anodo no tubo (tensão de aceleração dos elétrons), a deflexão magnética que os elétrons sofrem, e, com uma boa aproximação, a velocidade de translação dos elétrons e a relação carga/massa dessas partículas.
O experimento virtual da dupla fenda ao nível do ensino médio (Parte II): uma análise quântica do comportamento corpuscular e ondulatório da luz
Authors: Ferreira Danilo Cardoso , De Souza Filho Moacir Pereira
Published: May 2019

Nosso trabalho analisa o experimento virtual da dupla fenda e está dividido em duas partes: a Parte I (publicada) que tratou da análise clássica do comportamento (corpuscular e ondulatório) e a Parte II (o presente artigo) que aborda o comportamento quântico da luz (fótons). Nosso processo metodológico se dividiu em 3 (três) etapas: (i) analisamos, primeiramente, com o auxílio de experimentos virtuais, o comportamento de um feixe de luz que atravessou uma parede com duas fendas. Neste caso, percebe-se que a luz sofre interferência. (ii) Em seguida, utilizamos o mesmo experimento, mas agora com fótons individuais. Os fótons se comportam como ondas e sofrem interferência, como antes. (iii) Finalmente, para descobrir o que estava acontecendo, colocamos um detector próximo às fendas. Nesta situação, estranhamente, os fótons se comportaram como partículas (corpúsculos). Com o objetivo de explicar estes resultados, utilizamos a notação de brackets proposta por Paul Dirac (1902-1984) que nos permite representar os vetores de estado, os quais nos propiciam mostrar, matematicamente, o que ocorre no experimento da dupla fenda com objetos quânticos. Devido à complexidade matemática (para o ensino médio) intrínseca à notação de Dirac fizemos uma espécie de “tradução” deste recurso matemático para este nível de ensino. Acreditamos que este artifício poderá ser útil para a compreensão de outros conceitos da mecânica quântica, tais como spin 1/2 e sistemas de dois níveis.
Analysis of sulfate aerosols over Austria: a case study
Authors: Talianu Camelia , Seibert Petra
Published: May 2019

Abstract. An increase in the sulfate aerosols observed in the period 1–6 April 2014
over Austria is analyzed using in situ measurements at an Austrian air quality
background station, lidar measurements at the closest EARLINET stations around
Austria, CAMS near-real-time data, and particle dispersion modeling using
FLEXPART, a Lagrangian transport model. In situ measurements of
SO2, PM2.5, PM10, and
O3 were performed at the air quality background station
Pillersdorf, Austria (EMEP station AT30, 48∘43′ N, 15∘55′ E).
A CAMS aerosol mixing ratio analysis for Pillersdorf and the lidar
stations Leipzig, Munich, Garmisch, and Bucharest indicates the presence of an event
of aerosol transport, with sulfate and dust as principal components.
For the sulfate layers identified at Pillersdorf from the CAMS analysis,
backward- and forward-trajectory analyses were performed, associating lidar
stations with the trajectories. The lidar measurements for the period
corresponding to trajectory overpass of associated stations were analyzed,
obtaining the aerosol layers, the optical properties, and the aerosol types. The
potential sources of transported aerosols were determined for Pillersdorf and
the lidar stations using the source–receptor sensitivity computed with FLEXPART,
combined with the MACCity source inventory. A comparative analysis for Pillersdorf
and the trajectory-associated lidar stations showed consistent aerosol layers,
optical properties and types, and potential sources. A complex pattern of
contributions to sulfate over Austria was found in this paper. For the lower
layers (below 2000 m) of sulfate, it was found that central Europe was the
main source of sulfate. Medium to smaller contributions come from sources in
eastern Europe, northwest Africa, and the eastern US. For the middle-altitude
layers (between 2000 and 5000 m), sources from central Europe (northern Italy,
Serbia, Hungary) contribute with similar emissions. Northwest Africa and the eastern
US also have important contributions. For the high-altitude layers (above
5000 m), the main contributions come from northwest Africa, but sources from
the southern and eastern US also contribute significantly. No contributions from
Europe are seen for these layers. The methodology used in this paper can be used
as a general tool to correlate measurements at in situ stations and EARLINET
lidar stations around these in situ stations.
Sulfate deprivation triggers high methane production in a disturbed and rewetted coastal peatland
Authors: Koebsch Franziska , Winkel Matthias , Liebner Susanne , Liu Bo , Westphal Julia , Schmiedinger Iris , Spitzy Alejandro , Gehre Matthias , Jurasinski Gerald , Köhler Stefan , Unger Viktoria , Koch Marian , Sachs Torsten , Böttcher Michael E.
Published: May 2019

Abstract. In natural coastal wetlands, high supplies of marine
sulfate suppress methanogenesis. Coastal wetlands are, however, often
subject to disturbance by diking and drainage for agricultural use and can
turn to potent methane sources when rewetted for remediation. This suggests
that preceding land use measures can suspend the sulfate-related methane
suppressing mechanisms. Here, we unravel the hydrological relocation and
biogeochemical S and C transformation processes that induced high methane
emissions in a disturbed and rewetted peatland despite former brackish
impact. The underlying processes were investigated along a transect of
increasing distance to the coastline using a combination of concentration
patterns, stable isotope partitioning, and analysis of the microbial
community structure. We found that diking and freshwater rewetting caused a
distinct freshening and an efficient depletion of the brackish sulfate
reservoir by dissimilatory sulfate reduction (DSR). Despite some legacy
effects of brackish impact expressed as high amounts of sedimentary S and
elevated electrical conductivities, contemporary metabolic processes
operated mainly under sulfate-limited conditions. This opened up favorable
conditions for the establishment of a prospering methanogenic community in
the top 30–40 cm of peat, the structure and physiology of which resemble
those of terrestrial organic-rich environments. Locally, high amounts of
sulfate persisted in deeper peat layers through the inhibition of DSR,
probably by competitive electron acceptors of terrestrial origin, for
example Fe(III). However, as sulfate occurred only in peat layers below
30–40 cm, it did not interfere with high methane emissions on an ecosystem
scale. Our results indicate that the climate effect of disturbed and
remediated coastal wetlands cannot simply be derived by analogy with their
natural counterparts. From a greenhouse gas perspective, the re-exposure of
diked wetlands to natural coastal dynamics would literally open up the
floodgates for a replenishment of the marine sulfate pool and therefore
constitute an efficient measure to reduce methane emissions.
Revisiting the relationship between soil moisture and N2O production pathways by measuring 15N2O isotopomers
Authors: Congreves Kate A. , Phan Trang , Farrell Richard E.
Published: May 2019

Abstract. Understanding the production pathways of potent greenhouse gases, such as nitrous oxide (N2O), is essential for accurate flux prediction and for developing effective adaptation and mitigation strategies in response to climate change. Yet, there remain surprising gaps in our understanding and precise quantification of the underlying production pathways – such as the relationship between soil moisture and N2O production pathways. A powerful, but arguably underutilized, approach for quantifying the relative contribution of nitrification and denitrification to N2O production involves determining 15N2O isotopomers and 15N site preference (SP) via spectroscopic techniques. Using one such technique we conducted a short-term incubation to precisely quantify the relationship between soil moisture and N2O production pathways. For each of three soils, microcosms were arranged in a complete random design with four replicates; each microcosm consisted of air-dried soil packed into plastic petri dishes wherein moisture treatments were established for water contents equivalent to 45 to 105 % water-filled pore space (WFPS). The microcosms were placed in 1-L jars and sealed; headspace samples were collected after 24-h and analyzed for total N2O concentrations using gas chromatography, and for 15N2O isotopomers using cavity ring-down spectroscopy. Relatively low N2O fluxes and high SP values indicted nitrification during dry soil conditions, whereas at higher soil moisture, peak N2O emissions coincided with a sharp decline in SP indicating denitrification. This pattern supports the classic N2O production curves from nitrification and denitrification as inferred by earlier research; however, our isotopomer data enabled the quantification of source partitioning for either pathway thereby providing clarity on N2O sources during the transition from nitrification to denitrification. At soil moisture levels  78 %, denitrification completely dominated. Clearly, the soil moisture levels during transition is a key regulation of N2O production pathways.
Higher education, impact, and the Internet: Publishing, politics, and performativity
Authors: Roberts Peter
Published: May 2019

This paper considers how and why scholarly publishing has changed over the last two decades. It discusses the role of the Internet in overcoming earlier barriers to the rapid circulation of ideas and in opening up new forms of academic communication. While we live in a world increasingly dominated by images, the written word remains vital to academic life, and more published scholarly material is being produced than ever before. The paper argues that the Internet provides only part of the explanation for this growth in the volume of written material; another key contributing factor is the use of performance-based research funding schemes in assessing scholarly work. Such schemes can exert a powerful influence over researchers, changing their views of themselves and the reasons for undertaking their activities. With their tendency to encourage the relentless, machine-like production and measurement of outputs, they can be dehumanizing. Of even greater concern, however, is the possibility of systems based entirely on metrics, ‘impact’, and revenue generation. The paper critiques these trends, makes a case for the continuing value of peer review, and comments briefly on the subversive potential of the Internet in resisting the dehumanization of scholarly work.
Breaking news on Wikipedia: collaborating, collating and competing
Authors: Avieson Bunty
Published: May 2019

When a major global news event occurs, such as the Easter bombings in Sri Lanka or the March shootings in New Zealand, Wikipedia contributors from around the world come together in a virtual newsroom to craft a narrative, followed closely by readers seeking the latest information. In any given month, the site’s most popular articles — both in number of views and number of edits — are those reporting breaking news. Wikipedia’s protocols of ‘no original research’ mean the contributors must draw on the work of journalists, collating and re-purposing what has been published online. Taking as a case study the 2014 Sydney hostage crisis this paper analyzes Wikipedia’s breaking news practices and the ways the Internet is changing perceptions of news.
Stock Market Developmentand Economic Growth in Nigeria
Authors: Ajayi E. O. , Araoye F. E.
Published: May 2019

This paper empirically analyzed the effect of the Nigerian Stock market capitalization on the nation’s economic growth from 1985 to 2010. The economic growth was proxy by the GDP while the stock market variable considered included; market capitalization and market turnover ratio as independent variables as proxy for stock market development in terms of size and liquidity. The paper establishes a unidirectional causality that runs from economic growth to stock market. The result shows that economic growth influences stock market capitalization while stock market capitalization does not influence economic growth. The result indicates that economic growth catalyses stock market in Nigeria. The government is therefore advised to put up measures to stem up investors’ confidence and activities in the market so that it could contribute significantly to the Nigerian economic growth.
Autonomy in Budgeting Decisions of Local Government Union Councils: A Study of Bangladesh
Authors: Islam Talukdar Mohammad Rafiqul
Published: May 2019

Considering the critical influencing phenomena, the study explores the causal mechanism of influences, as well as how such process works that lead to shape the dominant implications of influences on local government Union Councils’ budgetary autonomy, leading to the impact on their local governance.The research reveals the fact that the effects of the influencing phenomena on the budgetary autonomy of Union Councils in Bangladesh are evident with varying degrees and dimensions, but the influences do not always collide with the budgetary autonomy of Union Councils there. The indicator-based empirical analysis reveals that the magnitude of influences is almost double than that of the budgetary autonomy of Union Councils in Bangladesh. Thus, the autonomy of Union Councils in their budgeting decisions is a concern in the study of decentralization and local governance in Bangladesh.Originality and significance:The research contributed in the literature stream of public administration, specifically in decentralization, local government finance as well as budgeting, and in local governance studies. The study findings to some extent substantiated the rationality of conditional national government transfers to the sub-national governments in Bangladesh. Beyond the general theoretical and practical significance of the study, its findings led to inviting a fundamental debate on the national-local tax base system and appreciated the fact that central hindrance towards effective functioning of the local government Union Councils in Bangladesh is the crisis of ownership and competence of UP representatives.
ALTERNATIVAS PARA O PROCESSO DE PRODUÇÃO DE BIODIESEL METÍLICO DE SOJA E ÓLEOS RESIDUAIS VISANDO À REDUÇÃO DE CUSTOS
Authors: Nascimento Fabiano Almeida , Pimentel Cavalcanti Luiz Antonio
Published: May 2019

Considerando o alto valor financeiro final do biodiesel em relação ao diesel, estratégias tem sido buscadas para redução de custos dos processos de produção que viabilizem uma maior utilização do mesmo. Visando a potencial redução dos custos na produção de biodiesel através do processo de transesterificação alcalina homogênea utilizando misturas binárias de óleos de soja e residual o presente trabalho levanta a discute a proposta de redução de custo na produção através do uso de misturas de binárias de óleos em diferentes proporções observando o índice de acidez – limite de 0,5% – para que haja uma única etapa reacional. Trata-se ainda da projeção e construção de um reator para o processo transesterificação que seja alimentado de forma autossustentável pelo uso de energia solar: energeticamente através de um coletor solar sustentável, e eletricamente por um sistema solar fotovoltaico off-grid. O desenvolvimento do protótipo do reator para produção de biodiesel alimentado unicamente por energia solar atestou que o sistema é viável para o processo de transesterificação utilizando óleo de soja puro visto que o teor de éster do biodiesel produzido foi de 97,6%. Observou-se também sucesso na utilização de uma mistura binária com 16% (v/v) de óleo residual para produção de biodiesel no reator supracitado, onde apresentou em todas as análises teor de éster maior que 96,5%.
DOSAGEM DE PRÉ-MISTURADO COM INSERÇÃO DA ESCÓRIA COMO AGREGADO
Authors: Rezende Juliana De Paula , Oliveira Tales Moreira , Fernandes Maicon De Ávila , Campos Bruno Henrique , Rocha Sabrina Andrade , Sousa Douglas Henrique Santos
Published: May 2019

O programa experimental de pesquisa apresentado consolidou-se na área de pavimentação, articulando a melhor alternativa para revestimentos de pavimentos, com a utilização da escória de aciaria. Trata-se de um insumo que possuí baixo custo de aquisição e alta resistência à abrasão, e esse revestimento alternativo será confeccionado por meio de dosagem pré-misturada a frio. O acúmulo de resíduos industriais gerados pelas siderúrgicas torna crescente a preocupação com questões de preservação ambiental na relação com o desenvolvimento econômico sustentável. Nesse cenário é unânime a necessidade da busca por insumos na construção da infraestrutura rodoviária devido à gradual escassez de matérias primas naturais. Buscando técnicas sustentáveis, o presente trabalho teve como finalidade a determinação de parâmetros, por meio de ensaios laboratoriais específicos nos agregados, na emulsão e na mistura, de modo a caracterizar uma dosagem de pré-misturado a frio com a utilização de escória como agregado. Esses ensaios foram realizados seguindo as normas vigentes. Os resultados não se mostraram satisfatórios devido à falta de aderência entre o ligante e os agregados siderúrgicos, inviabilizando o seu uso como agregado em misturas asfálticas a frio, salvo na possibilidade de utilização de aditivos que promovam a afinidade físico/química na interface ligante/agregado.
ESTABILIZAÇÃO GRANULOMÉTRICA DO SOLO DE SOLEDADE COM RESÍDUO DE BENEFICIAMENTO DE ÁGATA
Authors: Da Silva Camila Miotto , Donato Maciel
Published: May 2019

Com o passar dos anos, as obras de engenharia tiveram que evoluir constantemente, desenvolvendo novas técnicas construtivas, bem como a utilização de materiais sustentáveis. Uma técnica bastante conhecida que busca uma maior vida útil ao projeto é a estabilização granulométrica do solo. Ela tem por finalidade melhorar as propriedades mecânicas do solo. Se substituirmos o material granular pelo resíduo proveniente da extração e processamento de gemas preciosas do município de Soledade/RS, estaremos promovendo, assim, um manejo e disposição adequada para esses materiais residuais, que hoje se encontram estocados nos pátios das empresas, ocasionando danos ambientais. As vantagens desta técnica para melhoramento do solo do município de Soledade/RS foram estudadas em laboratório, através dos dados obtidos dos ensaios do Índice de Suporte Califórnia – ISC, mais conhecido como ensaio de CBR. Foram realizados ensaios do solo natural do município para comparar com a amostra de solo resíduo. Os resultados apresentaram um aumento de resistência mecânica de 129% se utilizado o resíduo para estabilização granulométrica.
TRATAMENTO DE EFLUENTES SIMULADOS CONTENDO ÍONS CIANETO DA INDÚSTRIA DE TINGIMENTO DE ÁGATAS
Authors: Petry Vitor Mateus Petry Mateus , Mistura Clóvia Marozzin , Vieira Yasmin , Foletto Edson Luiz
Published: May 2019

O Rio Grande do Sul é responsável por grande parte da extração de geodos de ágatas do mundo. A ágata é caracterizado como um material poroso, propício a processos de tingimento, que geram efluentes de elevado potencial de toxicidade pela presença de íons cianeto (CN-), que, em determinadas concentrações, podem ser letais para a saúde de seres vivos bem como causadores de inúmeros problemas nos corpos hídricos onde são lançados esses efluentes, sem tratamento apropriado. Esta pesquisa propôs-se a comparar formas alternativas de tratamento de águas residuais contendo íons CN-(aq) através do uso de Processos Oxidativos Avançados (POAs) como Fenton e foto Fenton modificados, assistidos por radiação ultrassom. Para verificação de eficiência dos processos foram quantificados parâmetros como descoloração e Demanda Química Oxigênio (DQO), entre bruto e tratado. A maior eficiência foi obtida para o processo com radiação UV, utilizando peróxido de hidrogênio (H2O2) 30% em 25 minutos a degradação alcançou 50,72%, chegando ao final do processo com 57,63% de degradação da cor do efluente.
Imigração e identidade familiar
Authors: Da Cunha Jorge Luiz
Published: May 2019

No extremo sul do território brasileiro, são os imigrantes europeus que inauguram o trabalho familiar em médias e pequenas propriedade, voltadas para o abastecimento do mercado interno. Neste trabalho procura-se analisar e compreender os processos identitários relacionados com a constituição familiar, no caso da colônia de Santa Cruz, fundada pelo governo provincial do Rio Grande do Sul em 1849. As informações coletadas sobre o tema deste projeto revelam claramente um desvelamento (desocultamiento) de atores sociais que em função de seus interesses privados, suas necessidades sociais, as interferências externas (autoridades civis, militares, religiosas), e as articulações da elite tradicional (grandes proprietários) configuram organizações familiares distintas daquelas tradicionalmente associadas aos imigrantes, especialmente os alemães, e a cultura de seus países de origem.
Le récit du demandeur d´asile entre défiance et confiscation
Authors: Delory-Momberger Christine
Published: May 2019

O procedimento de asilo, como é estabelecido hoje na França e na União Européia, é o resultado de uma longa e progressiva elaboração política e legal. Para além das disposições legais que o regulam, este procedimento baseia-se fundamentalmente, ao longo da sua implementação, numa avaliação e uma sanção de credibilidade pronunciada contra o requerente dos elementos da narrativa que produz como fundamento de seu pedido. Estas são as condições e exigências impostas pelo procedimento de asilo nesta acreditação da narrativa que nos propomos examinar. Poderemos, então, mostrar como as próprias condições de produção da narrativa dificultam a elaboração de uma história responsável por demonstrar e justificar a demanda apresentada; como, num contexto de tensão política sobre questões de imigração, a narrativa dos requerentes de asilo, que está constantemente à beira da suspeita, deve basear-se nas representações e normas explícitas e implícitas do país de acolhimento e suas instituições. Em suma, como a desconfiança geral em torno da palavra de asilo confisca sua história e a história de suas vidas para aqueles que buscam os caminhos de outra história e outra vida.
A formação de professores no Pibid: novas práticas, novos desafios
Authors: Antiqueira Liliane Silva , Machado Celiane Costa , Pereira Elaine Correa
Published: May 2019

O artigo busca refletir sobre como é desenvolvida a proposta de formação do Programa Institucional de Bolsa de Iniciação à Docência (PIBID) na Universidade xxxx. Para o aporte teórico, utiliza-se as ideias de Diniz-Pereira (2008) que defende a articulação entre universidade e escola para o preparo de novos profissionais da educação num movimento de formação acadêmico-profissional, Galiazzi e Moraes (2013) e Brandão (2005) os quais acreditam numa proposta de formação de professores com base em comunidades aprendentes. Além disso, são abordadas características do programa e um panorama do seu desenvolvimento na xxxx. Apresenta-se um recorte dos subprojetos Matemática e Interdisciplinar e como suas ações contribuem na formação de professores e licenciandos. Conclui-se que, tanto a universidade, quanto a escola e comunidade, são contemplados por impactos positivos do PIBID, o qual colabora para promover uma formação acadêmico-profissional por meio da ação-reflexão-ação, articulando teoria e prática desde a sala de aula até os cursos de licenciaturas.
A Programação de jogos como um instrumento motivador da aprendizagem
Authors: Pinto Sergio Crespo Coelho da Silva , Mattos Marcelo Simas
Published: May 2019

Este artigo descreve um modelo de aprendizagem que usa programação de jogos para telefones celulares como uma alternativa no processo de ensino-aprendizagem em disciplinas escolares. A aplicação do modelo tem em vista contribuir para a motivação, o engajamento e a aprendizagem dos estudantes por meio do desenvolvimento do pensamento computacional. Durante a pesquisa, foi desenvolvida uma arquitetura pedagógica deste modelo, nela se propõe que os estudantes realizem melhorias sucessivas em um jogo a partir de uma versão inicial. Aplicou-se a arquitetura por intermédio de experimentos com alunos do ensino médio, nos quais eles desenvolviam jogos digitais que envolviam conceitos de matemática. Este trabalho foi realizado de forma interdisciplinar, envolvendo docentes de Informática e Matemática. Para a programação, escolheu-se uma linguagem de programação visual baseada em blocos do ambiente MIT App Inventor 2, de modo a abstrair a complexidade das linguagens de programação tradicionais, como as linguagens C, C++, Pascal, Java e JavaScript. Para concretizar as melhorias, os estudantes foram incentivados a realizarem a programação em atendimento ao que foi especificado pelos docentes. Os resultados obtidos com a aplicação do modelo e a sua investigação indicam o seu uso como recurso didático contextualizado com o cotidiano dos estudantes do ensino médio.
Aprendizagem baseada em projetos num curso de técnico superior profissional de desenvolvimento de software
Authors: Alves Paulo , Morais Carlos , Miranda Luísa
Published: May 2019

Considerando que o foco do processo de ensino aprendizagem deve estar mais centrado na aprendizagem do que no ensino, surge a necessidade de fomentar estratégias assentes em metodologias que tornem o estudante o ator principal da sua aprendizagem, construindo aprendizagens significativas que possam responder a problemas reais da sociedade onde se encontra integrado. Assim, neste artigo, e tendo presente as necessidades da sociedade e os objetivos de formação dos cursos de técnico superior profissional na área das Ciências Informáticas, defende-se a utilização de metodologias ativas de aprendizagem com forte ligação à prática, entre as quais a aprendizagem baseada em projetos. Assim, apresenta-se uma reflexão sobre as metodologias de aprendizagem baseadas em projetos, contextualizam-se os cursos de técnico superior profissional e apresenta-se como exemplo um curso de técnico superior profissional de Desenvolvimento de Software, em funcionamento numa instituição de ensino superior português público. Este curso de técnico superior profissional foi desenhado para responder à necessidade de técnicos superiores no domínio da Informática e com a finalidade de ser desenvolvido e avaliado em função da adoção de metodologias de aprendizagem baseadas em projetos no seu funcionamento.
Frenotomia lingual em bebês diagnosticados com anquiloglossia pelo Teste da Linguinha: série de casos clínicos
Authors: Teles Portela De Oliveira Millena , Cavalcante Montenegro Nayara , Domingues Alves da Silva Raul Anderson , Matias de Carvalho Fernanda , Diniz Rebouças Pedro , Leal Dantas Lobo Patrícia
Published: May 2019

A frenotomia lingual é um procedimento simples e rápido, que consiste de uma pequena incisão do frênulo lingual, quando este é responsável por alterações na fala, mastigação e/ou amamentação. Tal procedimento quando realizado em bebês diagnosticados com anquiloglossia é importante para reestabelecer a adequada amamentação, diminuindo as dores nos mamilos, facilitando a deglutição e aumentando o ganho de peso, além de melhorar a respiração e a fonação. Objetivou-se relatar uma série de casos clínicos de frenotomia lingual em bebês diagnosticados com anquiloglossia através do Teste da Linguinha na Santa Casa de Misericórdia de Sobral-CE e nas Unidade Básicas de Saúde. Os procedimentos cirúrgicos de frenotomia foram realizados na Universidade Federal do Ceará (UFC) Campus Sobral, no Grupo de Estudos em Odontopediatria (GEOP) do curso de graduação em Odontologia, em 05 bebês de 0 a 2 anos diagnosticados com Anquiloglossia moderada a severa, cujas mães relataram dificuldades de amamentação e engasgos. Os bebês apresentaram excelentes resultados pós-operatórios e encontram-se em acompanhamento multiprofissional.
Patient work load and doctor hours in a Norwegian university hospital department
Authors: Bratlid Dag
Published: May 2019

Background: Although clinical hospital departments are 24/7 operations, doctor staffing is mainly concentrated during day-time on weekdays, while the rest of the week is covered by on-call systems to secure a minimum of patient care throughout the week. Few studies have investigated how this affects the relation between units of service (UOS) and available doctor hours.Methods: The study was carried out in a paediatric department with a neonatal intensive care section at a university hospital. Sixty per cent of the admissions were emergency cases. The organization of the 24/7 operation of the department is considered to be representative for most university hospital departments in Norway. OUS were calculated from the average number of in-hospital patients, out-patient consultations, the number of admissions and discharges during three defined time-periods: daytime, evening and night, assuming that all these doctor-patient contacts had the same impact on time use. Gross and net doctor hours on day-time during weekdays, on evenings, nights and weekends were calculated from work schedules, corrected for approved absence and long time sick leave. UOS per hour was calculated as the ratio between UOS and available gross and net doctor hours.Results: Both available doctor hours as well as UOS per hour varied considerably throughout the week. Eighty-three per cent of doctor hours were concentrated on day-time during weekdays, representing only 24% of week hours. Evenings and nights representing 76% of weekly hours, were covered with only 17% of doctor hours, and all nights through the week and weekend evenings, representing 55% of weekly hours, were covered with only 7% of total doctor hours available. Gross and net OUS per hour was increased six-fold and three-fold respectively at day-time on weekends compared to day-time during weekends. Evenings and nights had an even higher UOS per hour.Conclusion: The distribution of doctor hours through the week does not match UOS per hour. The high work load during weekends, evenings and nights are probably negative for the quality in patient treatment as well as for doctors work conditions. The department is probably understaffed during these time periods. It can also be asked if the department is overstaffed during day-time on weekdays. A more even and balanced staffing of hospital departments in relation to patient work load seems necessary in relation to quality in patient treatment, doctors' working conditions and productivity.