bluuebunny/crossref_metadata_2025 huggingface dataset:
On The Energy Efficiency of Adaptive WBAN Systems for mHealth Services
Authors: Sudjai M. , Tran L.C. , Safaei F.
Published: March 2017

We recently proposed an adaptive Wireless Body Area Network (WBAN) system for mHealth service, which shows better bit error performance compared to the non-adaptive one. However, analysis and maximization of the energy efficiency as one of the key design considerations of these networks remain an open problem. Therefore, this paper investigates the energy efficiency of the proposed adaptive WBAN system by considering both the transmission power and the power consumed in the circuitry which consists of rate-independent and rate-dependent components. Since the distance between the hub and the wireless access point in WBAN is relatively short, beside the transmission power, the circuitry power also plays an important role. The adaptive WBAN is evaluated in two different multiple input multiple output configurations. It is found that the adaptive WBAN system substantially outperforms the non-adaptive one in terms of energy efficiency in both 2I1O and 2I2O configurations. Furthermore, the 2I2O adaptive WBAN system is 7.9 dB superior to the 2I1O in terms of energy efficiency. This is because the 2I2O configuration has a higher diversity order and a better array gain compared to the 2I1O configuration, thus the former has better capability to mitigate fading and improve the link reliability. This energy related performance coupled with the improved bit error rate performance suggests that the proposed adaptive WBAN scheme is an attractive physical layer option of a WBAN system for mHealth services. Thus, this scheme could provide not only better quality of services, but also energy saving to enhance the battery life of a WBAN system.
Method for Removal of Refrigerant from Mobile Air Conditioning System to Quantify Charge Amount
Authors:   Interior Climate Control Service Committee
Published: March 2017

This Standard provides an overview of results and requirements needed to remove refrigerant from a mobile air conditioning system for determining refrigerant emissions (leakage).

This reclaim procedure for use on fleet vehicles in a field service environment should produce an accuracy and repeatability sufficient to determine refrigerant loss within 2 g.
Standard for Refrigerant Risk Analysis for Mobile Air Conditioning Systems
Authors:   Interior Climate Control Vehicle OEM Committee
Published: March 2017

This Standard describes methods to understand the risks associated with vehicle mobile air conditioning [MAC] systems in all aspects of a vehicle’s lifecycle including design, production, assembly, operation and end of life. Information for input to the risk assessment is provided in the Appendices of this document. This information should not be considered to be complete, but only a reference of some of the data needed for a complete analysis of the risk associated with the use of refrigerants in MAC systems.
xEV Labels to Assist First and Second Responders, and Others
Authors:   Hybrid - EV Committee
Published: March 2017

This recommended practice prescribes clear and consistent labeling methodology for communicating important xEV high voltage safety information. Examples of such information include identifying key high voltage system component locations and high voltage disabling points. These recommendations are based on current industry best practices identified by the responder community. Although this recommended practice is written for xEVs with high voltage systems, these recommendations can be applied to any vehicle type.
A/C Compressor Oil Separator Effectiveness Test Standard
Authors:   Interior Climate Control MAC Supplier Committee
Published: March 2017

This SAE Standard establishes the test conditions and reporting method for quantifying refrigerant circuit oil circulation rate (OCR) reduction effectiveness of mobile air conditioning compressors using R-134a and R-1234yf refrigerants that include oil separators and/or other design features for the purpose of reducing the OCR in the refrigerant circuit.
Prostrating Walk in the Campaign against Sino-Hong Kong Express Railway: Collective Identity of Native Social Movement
Authors: Chan Steve Kwok-Leung
Published: March 2017

Occupation, blockage and storming are not rare in social movements a decade after China resuming sovereignty in Hong Kong. The organizers and participants usually involve locally born young people. Some of them are secondary school students in their teens. They are known as the fourth generation or post-1980s born Hongkongers. The paper examines the cultural context of social movements involving these youth activists. It mainly studied the campaign against the Sino-Hong Kong Express Railway development project. The project called for the demolition of the Tsoi Yuen Village, a small rural village located on its designed route. Since then, the role of younger generation in social movements has been generally recognized. Social media are widely employed in all stages of the movements with citizen journalists actively involved. The impressive ‘prostrating walk’ imitating Tibetan pilgrims becomes the symbol of these youth activists. It keeps appearing in other campaigns including Occupy Central in Hong Kong in 2014. This paper argues that the rise of nativism, advancement in ICT technology and shifting towards new social movements contribute to the dominant role of youth in recent social movements of Hong Kong. Collective identity of Hongkonger in response to the top-down assimilation by China, strengthens the movement.
Upper tropospheric cloud systems derived from IR sounders: properties of cirrus anvils in the tropics
Authors: Protopapadaki Sofia E. , Stubenrauch Claudia J. , Feofilov Artem G.
Published: March 2017

Abstract. Representing about 30 % of the Earth's total cloud cover, upper tropospheric clouds play a crucial role in the climate system by modulating the Earth's energy budget and heat transport. When originating from convection, they often form organized systems. The high spectral resolution of the Atmospheric Infrared Sounder (AIRS) allows reliable cirrus identification, both from day and nighttime observations. Tropical upper tropospheric cloud systems have been analyzed by using a spatial composite technique on the retrieved cloud pressure of AIRS data. Cloud emissivity is used to distinguish convective core, cirrus and thin cirrus anvil within these systems. A comparison with simultaneous precipitation data from the Advanced Microwave Scanning Radiometer – Earth Observing System (AMSR-E) shows that, for tropical upper tropospheric clouds, a cloud emissivity close to 1 is strongly linked to a high rain rate, leading to a proxy to identify convective cores. Combining AIRS cloud data with this cloud system approach, using physical variables, provides a new opportunity to relate the properties of the anvils, including also the thinner cirrus, to the convective cores. It also distinguishes convective cloud systems from isolated cirrus systems. Deep convective cloud systems, covering 15 % of the tropics, are further distinguished into single-core and multi-core systems. Though AIRS samples the tropics only twice per day, the evolution of longer-living convective systems can be still statistically captured, and we were able to select relatively mature single-core convective systems by using the fraction of convective core area within the cloud systems as a proxy for maturity. For these systems, we have demonstrated that the physical properties of the anvils are related to convective depth, indicated by the minimum retrieved cloud temperature within the convective core. Our analyses show that the size of the systems does in general increase with convective depth, though for similar convective depth oceanic convective cloud systems are slightly larger than continental ones, in agreement with other observations. In addition, our data reveal for the first time that the fraction of thin cirrus over the total anvil area increases with the convective depth similarly for oceanic and continental convective systems. This has implications for the radiative feedbacks of anvils on convection which will be more closely studied in the future.
On biases in atmospheric CO inversions assimilating MOPITT satellite retrievals
Authors: Yin Yi , Chevallier Frederic , Ciais Philippe , Broquet Gregoire , Cozic Anne , Szopa Sophie , Wang Yilong
Published: March 2017

Abstract. CO inverse modelling studies have so far reported significant discrepancies between model concentrations optimised with the Measurement of Pollution in the Troposphere (MOPITT) satellite retrievals and surface in-situ measurements. Here, we assess how well a global CTM fits a large variety of independent CO observations (surface and aircraft air sample measurements and ground-based column retrievals) before and after assimilating MOPITTv6 total column (XCO) retrievals to optimise CO sources/sinks. Consistent negative prior biases to all types of observations in all sensitivity tests suggest an underestimation of current surface emissions in the Northern hemisphere. In contrast, prior simulations fit the surface air sample observations well in the Southern hemisphere but underestimate CO in the free troposphere and on average in the column. Positive biases in MOPITT retrievals are identified in the Northern mid- and high latitudes, highlighting the importance of proper bias-correction of those satellite retrievals. Biases in representing vertical CO profiles are found over the ocean and most significantly in the Southern hemisphere, suggesting errors in the vertical distribution of CO chemical sources/sinks or in the vertical mixing to be improved in future modelling studies. Varying model-data differences are found in the vertical between CTM and MOPITT retrieved vertical profiles after having assimilated MOPITT XCO; these bias structures indicate that the posterior model differences to in-situ observations would be even larger if the near surface retrievals were assimilated instead of XCO. In addition, given the higher long-term stability of the MOPITT XCO retrievals as opposed to divergent temporal bias drifts found in the vertical profile retrievals and a lower sensitivity to model errors in the total column quantity than at a certain altitude, we recommend assimilating the column rather than the profiles or the partial profiles at the current stage.
Improved OSIRIS NO2 retrieval algorithm: description and validation
Authors: Sioris Christopher E. , Rieger Landon A. , Lloyd Nicholas D. , Bourassa Adam E. , Roth Chris Z. , Degenstein Douglas A. , Camy-Peyret Claude , Pfeilsticker Klaus , Berthet Gwenaël , Catoire Valéry , Goutail Florence , Pommereau Jean-Pierre , McLinden Chris A.
Published: March 2017

Abstract. A new retrieval algorithm for OSIRIS (Optical Spectrograph and Infrared Imager System) nitrogen dioxide (NO2) profiles is described and validated. The algorithm relies on spectral fitting to obtain slant column densities of NO2, followed by inversion using an algebraic reconstruction technique and the SaskTran spherical radiative transfer model (RTM) to obtain vertical profiles of local number density. The validation covers different latitudes (tropical to polar), years (2002–2012), all seasons (winter, spring, summer, and autumn), different concentrations of nitrogen dioxide (from denoxified polar vortex to polar summer), a range of solar zenith angles (68.6–90.5°), and altitudes between 10.5 and 39 km, thereby covering the full retrieval range of a typical OSIRIS NO2 profile. The use of a larger spectral fitting window than used in previous retrievals reduces retrieval uncertainties and the scatter in the retrieved profiles due to noisy radiances. Improvements are also demonstrated through the validation in terms of bias reduction at 15–17 km relative to the OSIRIS operational v3.0 algorithm. The diurnal variation of NO2 along the line of sight is included in a fully spherical multiple scattering RTM for the first time. Using this forward model with built-in photochemistry, the scatter of the differences relative to the correlative balloon NO2 profile data is reduced.
From pole to pole: 33 years of physical oceanography onboard R/V Polarstern
Authors: Driemel Amelie , Fahrbach Eberhard , Rohardt Gerd , Beszczynska-Möller Agnieszka , Boetius Antje , Budéus Gereon , Cisewski Boris , Engbrodt Ralph , Gauger Steffen , Geibert Walter , Geprägs Patrizia , Gerdes Dieter , Gersonde Rainer , Gordon Arnold L. , Grobe Hannes , Hellmer Hartmut H. , Isla Enrique , Jacobs Stanley S. , Janout Markus , Jokat Wilfried , Klages Michael , Kuhn Gerhard , Meincke Jens , Ober Sven , Østerhus Svein , Peterson Ray G. , Rabe Benjamin , Rudels Bert , Schauer Ursula , Schröder Michael , Schumacher Stefanie , Sieger Rainer , Sildam Jüri , Soltwedel Thomas , Stangeew Elena , Stein Manfred , Strass Volker H , Thiede Jörn , Tippenhauer Sandra , Veth Cornelis , von Appen Wilken-Jon , Weirig Marie-France , Wisotzki Andreas , Wolf-Gladrow Dieter A. , Kanzow Torsten
Published: March 2017

Abstract. Measuring temperature and salinity profiles in the world's oceans is crucial to understanding ocean dynamics and its influence on the heat budget, the water cycle, the marine environment and on our climate. Since 1983 the German research vessel and icebreaker Polarstern has been the platform of numerous CTD (conductivity, temperature, depth instrument) deployments in the Arctic and the Antarctic. We report on a unique data collection spanning 33 years of polar CTD data. In total 131 data sets (1 data set per cruise leg) containing data from 10 063 CTD casts are now freely available at doi:10.1594/PANGAEA.860066. During this long period five CTD types with different characteristics and accuracies have been used. Therefore the instruments and processing procedures (sensor calibration, data validation, etc.) are described in detail. This compilation is special not only with regard to the quantity but also the quality of the data – the latter indicated for each data set using defined quality codes. The complete data collection includes a number of repeated sections for which the quality code can be used to investigate and evaluate long-term changes. Beginning with 2010, the salinity measurements presented here are of the highest quality possible in this field owing to the introduction of the OPTIMARE Precision Salinometer.
The CarbonTracker Data Assimilation Shell (CTDAS) v1.0:
implementation and global carbon balance 2001–2015
Authors: van der Laan-Luijkx Ingrid T. , van der Velde Ivar R. , van der Veen Emma , Tsuruta Aki , Stanislawska Karolina , Babenhauserheide Arne , Zhang Hui Fang , Liu Yu , He Wei , Chen Huilin , Masarie Kenneth A. , Krol Maarten C. , Peters Wouter
Published: March 2017

Abstract. Data assimilation systems are used increasingly to constrain the budgets of reactive and long-lived gases measured in the atmosphere. Each trace gas has its own lifetime, dominant sources and sinks, and observational network (from flask sampling and in situ measurements to space-based remote sensing) and therefore comes with its own optimal configuration of the data assimilation. The CarbonTracker Europe data assimilation system for CO2 estimates global carbon sources and sinks, and updates are released annually and used in carbon cycle studies. CarbonTracker Europe simulations are performed using the new modular implementation of the data assimilation system which is called the CarbonTracker Data Assimilation Shell (CTDAS). Here, we present and document this redesign of the data assimilation code that forms the heart of CarbonTracker, specifically meant to enable easy extension and modification of the data assimilation system. This paper also presents the setup of the latest version of CarbonTracker Europe (CTE2016), including the use of the gridded state vector, and shows the resulting carbon flux estimates. We present the distribution of the carbon sinks over the hemispheres and between the land biosphere and the oceans. We show that with equal fossil fuel emissions, 2015 has a higher atmospheric CO2 growth rate compared to 2014, due to reduced land carbon uptake in later year. The European carbon sink is especially present in the forests, and is reduced during drought years. Finally, we also demonstrate the versatility of CTDAS by presenting an overview of the wide range of applications for which it has been used so far.
Recent changes in terrestrial water storage in the Upper Nile Basin: an evaluation of commonly used gridded GRACE products
Authors: Shamsudduha Mohammad , Taylor Richard G. , Jones Darren , Longuevergne Laurent , Owor Michael , Tindimugaya Callist
Published: March 2017

Abstract. GRACE (Gravity Recovery and Climate Experiment) satellite data monitor large-scale changes in total terrestrial water storage (ΔTWS) providing an invaluable tool where in situ observations are limited. Substantial uncertainty remains, however, in the amplitude of GRACE gravity signals and the disaggregation of ΔTWS into individual terrestrial water stores (e.g. groundwater storage). Here, we test the phase and amplitude of GRACE ΔTWS signals from 5 commonly-used gridded products (i.e., NASA's GRCTellus: CSR, JPL GFZ; JPL-Mascons; GRGS GRACE) using in situ data and modelled soil-moisture from the Global Land Data Assimilation System (GLDAS). The focus of this analysis is a large and accurately observed reduction in ΔTWS of 75 km3 from 2004 to 2006 in Lake Victoria in the Upper Nile Basin. We reveal substantial variability in current GRACE products to quantify the reduction of ΔTWS in Lake Victoria that ranges from 68 km3 (GRGS) to 50 km3 and 26 km3 for JPL-Mascons and GRCTellus, respectively. Representation of the phase in ΔTWS in the Upper Nile Basin by GRACE products varies but is generally robust with GRGS, JPL-Mascons and GRCTellus (ensemble mean of CSR, JPL and GFZ time-series data) explaining 91 %, 85 %, and 77 % of the variance, respectively, in in-situ ΔTWS. Resolution of changes in groundwater storage (ΔGWS) from GRACE ΔTWS is greatly constrained by both uncertainty in modelled changes in soil-moisture storage (ΔSMS) and the low annual amplitudes in ΔGWS (e.g., 3.5 to 4.4 cm) observed in deeply weathered crystalline rocks underlying the Upper Nile Basin. Our study highlights the substantial uncertainty in the amplitude of ΔTWS that can result from different data-processing strategies in commonly used, gridded GRACE products.
Importance of considering riparian vegetation
requirements for the long-term efficiency of environmental
flows
Authors: Rivaes Rui , Boavida Isabel , Santos José M. , Pinheiro António N. , Ferreira Teresa
Published: March 2017

Abstract. Environmental flows remain biased toward the traditional biological group of fish species. Accordingly, these flows ignore the inter-annual flow variability that rules species with longer life cycles, thereby disregarding the long-term perspective of the riverine ecosystem. We analyzed the influence of considering riparian requirements for the long-term efficiency of environmental flows. For that analysis, we modeled the riparian vegetation development for a decade facing different environmental flows in two case studies. Next, we assessed the corresponding fish habitat availability of three common fish species in each of the resulting riparian habitat scenarios. Modeling results demonstrated that the environmental flows disregarding riparian vegetation requirements promoted riparian degradation, particularly vegetation encroachment. Such circumstance altered the hydraulic characteristics of the river channel where flow depths and velocities underwent changes up to 10 cm and 40 cm s−1, respectively. Accordingly, after a decade of this flow regime, the available habitat area for the considered fish species experienced modifications in absolute from 18.16 % to 109.75 % compared to the natural habitat. In turn, environmental flows regarding riparian vegetation requirements were able to maintain riparian vegetation near natural standards, thereby preserving the hydraulic characteristics of the river channel and sustaining the fish habitat close to the natural condition. As a result, fish habitat availability never changed more than 16.17 % from the natural habitat.
The influence of an extended Atlantic hurricane season on inland flooding potential in the southeastern United States
Authors: Stone Monica H. , Cohen Sagy
Published: March 2017

Abstract. Recent tropical cyclones, like Hurricane Katrina, have been some of the worst the United States has experienced. Tropical cyclones are expected to intensify, bringing about 20 % more precipitation, in the near future in response to global climate warming. Further, global climate warming may extend the hurricane season. This study focuses on four major river basins (Neches, Pearl, Mobile, and Roanoke) in the southeastern United States that are frequently impacted by tropical cyclones. An analysis of the timing of tropical cyclones that impact these river basins found that most occur during the low-discharge season and thus rarely produce riverine flooding conditions. However, an extension of the current hurricane season of June–November could encroach upon the high-discharge seasons in these basins, increasing the susceptibility for riverine hurricane-induced flooding. Our results indicate that 28–180 % more days would be at risk of flooding from an average tropical cyclone with an extension of the hurricane season to May–December (just 2 months longer). Future research should aim to extend this analysis to all river basins in the United States that are impacted by tropical cyclones in order to provide a bigger picture of which areas are likely to experience the worst increases in flooding risk due to a probable extension of the hurricane season with expected global climate change in the near future.
The Dynamic Programming Models for Inventory Control System with Time-varying Demand
Authors: Trinh Truong Hong
Published: March 2017

The concept of dependent and independent demand is important in planning and replenishment inventory that also requires different inventory control solutions. This paper employs the dynamic programming technique for inventory control system with time varying demand to propose the replenishment policy in terms of the economic order quantity, number of replenishment, and reorder point where total inventory cost is minimized. The study result indicates that the dynamic programming models outperform the traditional lot sizing models in term of total inventory cost. Moreover, the paper creates opportunities for extending further researches on dynamic inventory related to uncertainty conditions of demand, yield, lead time, and capacity constraints.
Program Evaluation Interest and Skills of School Counselors
Authors: Astramovich Randall L.
Published: March 2017

School counselors participated in a study examining their program evaluation interest and skills. Findings suggest that school counselors understand the importance of program evaluation, yet they may lack the skills and confidence to successfully engage in program evaluation activities. Professional development training may be an important method for helping today's school counselors develop skills and confidence in program evaluation. This article presents implications for school counselor training and practice and recommendations for future research.
Verification of Equation for Evaluating Dislocation Density during Steady-state Creep of Metals
Authors: Tamura Manabu
Published: March 2017

Ninety-two sets of observed dislocation densities for crept specimens of 21 types of ferritic/martensitic and austenitic steels, Al, W, Mo, and Mg alloys, Cu, and Ti including germanium single crystals were collected to verify an equation for evaluating the dislocation density during steady-state creep proposed by Tamura and Abe (2015). The activation energy, Qex, activation volume, Vex, and Larson–Miller constant, Cex, were calculated from the creep data. Using these parameter constants, the strain rate, and the temperature dependence of the shear modulus, a correction term, Gamma, was back-calculated from the observed dislocation density for each material. Gamma is defined in the present paper as a function of the temperature dependences of both the shear modulus and pre-exponential factor of the strain rate. The values of Gamma range from −394 to 233  and average 2.1 KJmol-1, which is a value considerably lower than the average value of Qex (410.4 KJmol-1), and values of Gamma are mainly within the range from 0 to 50 KJmol-1. The change in Gibbs free energy, Delta G, for creep deformation is obtained using the calculated value of , and the empirical relation Delta G~Delta GD is found, where Delta GD is the change in Gibbs free energy for self-diffusion of the main componential element of each material. Experimental data confirm the validity of the evaluation equation for the dislocation density.
Description of a new species of the stag beetle genus Auxicerus Waterhouse, 1883 (Coleoptera: Scarabaeoidea: Lucanidae)
Authors: Perger Robert , Grossi Paschoal Coelho , Guerra Fernando
Published: March 2017

A new species of the Andean stag beetle genus Auxicerus Waterhouse, 1883 is described from the humid Tucuman-Bolivian forest in the southern Bolivian Andes. Auxicerus magnipunctatus sp. nov. is distinguished from all congeners by the distinctly larger punctures of the mesosternum; antennomeres 2–6 subquadrate, last two joints of club wider than long; lamellae not widely separated; posterior end of ocular canthus rounded and anterior edge of canthus moderately developed into an obtuse triangle. Auxicerus magnipunctatus sp. nov. is possibly endemic to the Tucuman-Bolivian forest. Along with the presence of other endemic beetle species with tropical congeners, the discovery of A. magnipunctatus sp. nov. supports the idea that the persistence of rather tropical taxa in the subtropical realm is fostered by increased humidity at orographic rain barriers and climatic stability in the Tucuman-Bolivian forest.
Development and Validation of Targeted Next-Generation Sequencing Panels for Detection of Germline Variants in Inherited Diseases
Authors: Santani Avni , Murrell Jill , Funke Birgit , Yu Zhenming , Hegde Madhuri , Mao Rong , Ferreira-Gonzalez Andrea , Voelkerding Karl V. , Weck Karen E.
Published: March 2017

Context.—

The number of targeted next-generation sequencing (NGS) panels for genetic diseases offered by clinical laboratories is rapidly increasing. Before an NGS-based test is implemented in a clinical laboratory, appropriate validation studies are needed to determine the performance characteristics of the test.

Objective.—

To provide examples of assay design and validation of targeted NGS gene panels for the detection of germline variants associated with inherited disorders.

Data Sources.—

The approaches used by 2 clinical laboratories for the development and validation of targeted NGS gene panels are described. Important design and validation considerations are examined.

Conclusions.—

Clinical laboratories must validate performance specifications of each test prior to implementation. Test design specifications and validation data are provided, outlining important steps in validation of targeted NGS panels by clinical diagnostic laboratories.
Em tempos de midiatização do ativismo: repensando características da narrativa jornalística digital através da apropriação do medium pelo Mídia Ninja
Authors: Aquino Bittencourt Maria Clara
Published: March 2017

Este artigo parte da premissa de midiatização do ativismo em processos de produção e circulação de conteúdos em contexto de movimentos em rede. Trabalha-se o impacto da midiatização nas práticas jornalísticas digitais para em seguida voltar a atenção para os recursos midiáticos empregados na narrativa construída pelo Mídia Ninja em sua página no Medium, uma ferramenta de publicação de conteúdo adotada pelo coletivo no início de 2014. O olhar para esta ferramenta permite inferir apontamentos que indicam como a apropriação tecnológica, fundamentada em aspectos sociais e calcada na midiatização do ativismo, é, ao mesmo tempo, capaz de provocar a evolução e promover a continuidade de características da narrativa jornalística digital.
Interações sociais e dinâmicas comunicacionais nos games
Authors: Assis Bruno Monte de , Costa Luciana Miranda
Published: March 2017

Este artigo tem como objetivo refletir sobre as práticas interacionais desenvolvidas nos games, tendo como componente empírico, o jogo online massivo Brasil Ragnarök Online-BRO. Partimos da premissa que uma das principais motivações referentes ao ato de jogar é a interação entre jogadores mediada pelos games, o que evidencia o caráter comunicativo do jogo a partir das ações dos jogadores, buscando modificar em diferentes gradações sua experiência de jogo. Utilizou-se de pesquisa documental e bibliográfica e imersão virtual através de um avatar no mundo virtual de BRO. Buscamos demonstrar que o jogo tem fundamental importância como atividade social, possibilitando aos jogadores criar novas formas de interagir e transformar regras e institucionalizações na estrutura do jogo, objetivando enriquecer e complexificar suas dinâmicas comunicacionais.
O diálogo entre a complexidade narrativa e a social TV no projeto XFRewatch da série The X-Files
Authors: Sigiliano Daiana , Borges Gabriela
Published: March 2017

Conceituada por Mittell (2012,2015) a complexidade narrativa tem como característica central a alternância entre a fruição episódica e a seriada. Exibida pela emissora Fox, a série The X-Files alterna entre episódios com arco narrativo prolongado, que são focados na mitologia da trama, e episódios isolados, tais como o monstro da semana. Nesse contexto, o objetivo deste artigo é refletir sobre os aspectos da complexidade narrativa presentes nos comentários postados no Twitter durante o XFRewatch. Lançado pelo fã clube The X-Files News, o projeto dialoga com a social TV ao estimular os fãs da série a compartilharem em tempo real suas impressões sobre os episódios no microblogging, resgatando e potencializando a ritualização e a socialização em torno do conteúdo televisivo.
Um uso muito particular do clítico se
Authors: Moraes Fernanda Beatriz Caricari de , Barbara Leila
Published: March 2017

Neste artigo, analisa-se um conjunto de verbos cujo funcionamento ou significado varia  quer  ocorram  com  o  clítico  se  ou  não.  A  multiplicidade  de  funções,  uma  das características  do  se,  é  um  dos  problemas  mais  interessantes  da  língua  portuguesa  e  de outras como francês, espanhol e italiano. Uma das controvérsias em torno desse clítico é a possibilidade do sujeito estar ou não indeterminado, como discutem as pesquisas de Nunes (1991), Monteiro (1994), Bagno (2000), Camacho (2002, 2003), entre outros. A base teórica, a Linguística Sistêmico-Funcional (HALLIDAY 1985, 1994; HALLIDAY; MATTHIESSEN, 2004), tem como foco a língua em uso e permite analisar as escolhas gramaticais em textos (escritos ou  falados)  com  base  no  contexto  de  cultura  e  de  situação  em  que  se  realizam.  A  partir das condições contextuais, o falante recorre às três metafunções da linguagem, das quais a que interessa, a este artigo, é a ideacional, responsável pelo uso da língua para falar sobre o  mundo,  tanto  externo  (coisas,  eventos,  qualidades,  etc.),  como  interno  (pensamentos, crenças, sentimentos, etc.). Pretende-se contribuir com os estudos sobre o uso desse clítico em língua portuguesa e, também, subsidiar a elaboração de materiais didáticos e desenho de cursos instrumentais que visam atender a produção e compreensão escrita.
Pedagogia dos multiletramentos: principais proposições metodológicas e pesquisas no âmbito nacional
Authors: Silva Themis Rondão Barbosa da Costa
Published: March 2017

Novas formas de comunicação e interação em função da digitalidade e as diversidades culturais e linguísticas implicam mudanças no contexto da vida pessoal, da vida pública e no âmbito do trabalho. Sendo assim, Cope e Kalantzis (2000) propuseram uma pedagogia que considera os efeitos cognitivos, culturais e sociais decorrentes dos variados contextos e culturas, a Pedagogia dos Multiletramentos. Neste artigo, discorro sobre as principais proposições metodológicas dessa pedagogia e apresento estudos recentes sobre o tema desenvolvidos no âmbito nacional.
The electoral photograph reloaded: a social semiotic approach
Authors: Veloso Francisco Osvanilson Dourado
Published: March 2017

While studies on the role of social media in political campaigns are growing, we still need to understand how well established communicative resources such as political photographs have been adapted in face of the digital transformation. Departing from Barthes (1972) discussion on electoral photographs, this paper discusses the production of Interactive meanings in photographs uploaded by the three main contenders in the Presidential Election 2014 in Brazil. The results show an expansion both in the functions and semiotic strategies adopted to establish a relationship with viewers through electoral photographs.
A relação entre o escritor e a produção escrita no viés da dialogicidade e interatividade
Authors: Goulart Ilsa Do Carmo Vieira
Published: March 2017

Este artigo considera que as palavras escritas se inserem em uma relação dialógica marcada pela complexidade dos enunciados, visto que a produção escrita decorreu de um processo de apreensão, de interação entre o escritor e ação de escrever, que se configurou em um determinado tempo e espaço. Diante disso, assume-se por objetivo refletir e analisar como alguns poetas expressam sua relação com a atividade de produção escrita, descrita e demarcada na expressividade de seus textos. O trabalho apoia-se na concepção de linguagem como processo de interação de Bakhtin, em interlocução com outros autores. O estudo toma como corpus investigativo textos como poemas, prosas poéticas de diferentes autores, selecionados por demarcarem em sua produção escrita uma ideia ou uma representação da conceituação do ato de escrever.
O PROBLEMA QUE TORNOU EULER FAMOSO
Authors: Gayo Jairo , Probst Roy Wilhelm
Published: March 2017

http://dx.doi.org/10.5902/2179460X12973In this study we present the Basel Problem whose answer has Leonhard Euler famous. Presents the Euler’s Proof which long contained a passage regarded as incorrect, but that after the Weierstrass Factorization Theorem was accepted. Also addresses other resolutions to the problem, its geometric representation and an application. It also discusses, through this problem, the importance of the History of Mathematics for the teacher of this discipline.
APLICAÇÃO DO SOFTWARE GEOGEBRA AO ENSINO DA GEOMETRIA ANALÍTICA
Authors: Guedes Paulo Cezar Camargo
Published: March 2017

http://dx.doi.org/10.5902/2179460X14555By teaching Analytic Geometry classes for High School Senior Students, I have always noticed that most students not only did not remember the main properties of Plane Geometry, but also had great difficulty making the analogy between them and the Cartesian Plane. Aiming an improvement in this learning, I thought about an intervention proposal which would make students environment work more pleasant. By the advent of computer and the GeoGebra Software, I tried to draw practical lessons, double or single, so that they could revise and acquire the main concepts of Analytic Geometry Plane. This work was developed in order to make the students visualize and acquire knowledge studied since Elementary and early school grades for further revision. The paper was prepared with questions to make students analyze certain properties previously chosen, discuss the results obtained from some questions, develop arguments to prove the observations obtained, and describe clearly and succinctly the relations and conditions to explain the concepts and properties studied.
AS CÔNICAS NA GEOMETRIA DO TÁXI
Authors: Loiola Carlos Augusto Gomes , Costa Chrsitine Sertã
Published: March 2017

http://dx.doi.org/10.5902/2179460X14596This paper aims to present conics when defined in a non-Euclidean geometry: the Taxicab geometry. The choice of this geometry was due to the simplicity of its definitions enabling diverse applications in Basic Education. It differs from Euclidean geometry by its metric and presents interesting and surprising results that enable the development of a more critical and meaningful learning.
UMA INTRODUÇÃO DO CÁLCULO VARIACIONAL NO ENSINO DA FÍSICA
Authors: Azevedo Magno Márcio , Kraemer Edson Luiz , Castro Tiago Bandeira
Published: March 2017

http://dx.doi.org/10.5902/2179460X14624The teaching subjects in the area of Exact Sciences has always been a problem in Basic Education. The contents of Mathematics and Physics have always reflected individually, low levels of learning, often with below average results, especially in high school. This influences the choice of graduating high school students for courses for the Exact Sciences in Higher Education. Although part of the same area, the application of knowledge from Mathematics to Physics teaching, still poses a problem for students and teachers. Thus, research and develop new tools to improve student learning and to make lessons more attractive these disciplines is a challenge. This study proposes the use of the computer program Maxima by having a visual demonstration of the theories involving the contents of Mathematics and Physics in the 1st grade of high school, providing thus improve utilization rates through an interdisciplinary mode. The use of the program in this study tends to make the lessons more attractive Mathematics and Physics, and classrooms become real laboratories where, in an interdisciplinary way, teachers and students can see the materialization of the theory involving the two disciplines as a effective tool in improving the teaching and learning of Mathematics and Physics.
UMA PROPOSTA PARA O ENSINO DE SISTEMAS LINEARES SEM A TEORIA DE MATRIZES, VIA PROBLEMAS HISTÓRICOS
Authors: Campos Viviane Simioli Medeiros , Tavares Agamenon Henrique de Carvalho
Published: March 2017

http://dx.doi.org/10.5902/2179460X14651In this work, based on the chinese method which was presented in the book that was published in I a.C., titled “the nine chapters”, a sequence of problems were suggested in order to introduce definitions and a method of solving linear systems, without introducing neither matrices nor determinants.
PROGRESSÃO HARMÔNICA E O TRIÂNGULO DE LEIBNIZ
Authors: Martins David Pinto
Published: March 2017

http://dx.doi.org/10.5902/2179460X14661This article intends to address in an elementary way the study of harmonic progressions. To this end, the usage of history of mathematics and problem solving strategies permeated the text. Several problems, some classics and other extracted from mathematical olympiads, were treated to show the wide applicability of this subject. In the end, the triangle of Leibniz and his relationship with the harmonic progressions is studied.
ÁREA DO TRIÂNGULO CUJO VÉRTICE SÃO AS PROJEÇÕES β DE UM PONTO O SOBRE OS LADOS DE UM TRIÂNGULO
Authors: Santos Aline Pires Carneiro , Krindges Andre
Published: March 2017

http://dx.doi.org/10.5902/2179460X14714This article aims to establish a relationship between the area of the triangle whose vertex projections on the side of the triangle and the area of such a triangle. We take as a basis the pedal triangle defined by Coxeter (1967), the work of Ivam(2007) and the activities in the jwilson [3] page beyond GeoGebra software that allows us to perform alteraçõoes in the geometric construction observing the behavior of others elements, promoting research and exploration of numerous conjectures.
SOBRE A SITUAÇÃO ENERGÉTICA BRASILEIRA: DE 1970 A 2030
Authors: Lima Maria Thereza da Silva Lopes , Souza Marina Corrêa de , Flores Tarcísio Santos , Cruz Nathália Gracielle da Silva , Diamantino Hugo Duarte , Barroso Lívia Alves , Rocha Bruna Almeida , Souza Rômulo Luiz Mendes , Ramos Pedro Camilo , Macedo Márcio Henrique Marques
Published: March 2017

http://dx.doi.org/10.5902/2179460X18492In this paper we report, first, the Brazilian energy situation from the major oil crisis in the 1970s.Next, we discuss the period from the 1980s until 2005.Finally, it is projected scenarios from recent past (2005-2013), to the future that begins today and runs until 2030.This is a work for educational purposes, in which we provide compiled data for school research in all levels.
DISCORRENDO SOBRE O USO DAS TERMELÉTRICAS NO BRASIL
Authors: Lima Maria Thereza da Silva Lopes , Souza Marina Corrêa de
Published: March 2017

http://dx.doi.org/10.5902/2179460X18493Today, the world depends on an abundant amount of energy. Hence, there is a need in creating new ways of obtaining energy to boost industrial production and thereby increase the wealth of a country. Therefore, industrial growth is strongly linked to way to get clean and cheap energy. In Brazil, preferentially uses the energy from the hydroelectric plants, but these may not always generate the energy required to supply all our needs. So, we can not deny that the thermal power plants have a respectable role in power generation, complementing the energy from the hydroelectric when they go through times of low production, as in periods of drought.
Link Prediction in Social Networks Using Markov Random Field
Authors: Zalaghi Zohreh
Published: March 2017

Link prediction is an important task for social networks analysis, which also has applications in other domains such as information retrieval, recommender systems and e-commerce. The task is related to predicting the probable connection between two nodes in the netwok. These links are subjected to loss because of the improper creation or the lack of reflection of links in the networks; so it`s possible to develop or complete these networks and recycle the lost items and information through link prediction. In order to discover and predict these links we need the information of the nodes in the network. The information are usually extracted from the network`s graph and utilized as factors for recognition. There exist a variety of techniques for link prediction, amongst them, the most practical and current one is supervised learning based approach. In this approach, the link prediction is considered as binary classifier that each pair of nodes can be 0 or 1. The value of 0 indicates no connection between nodes and 1 means that there is a connection between them. In this research, while studying probabilistic graphical models, we use Markov random field (MRF) for link prediction problem in social networks. Experimentl results on Flicker dataset showed the proposed method was better than previous methods in precision and recall.
Providing a New Approach for Modeling and Parameter Estimation of Probability Density Function of Noise in Digital Images
Authors: Yaghoobi Hanif , Maghooli Keivan , Barandagh Alireza Ghahramani
Published: March 2017

The main part of the noise in digital images arises when taking pictures or transmission. There is noise in the imagescaptured by the image sensors of the real world. Noise, based on its causes can have different probability density functions.For example, such a model is called the Poisson distribution function of the random nature of photon arrival process that isconsistent with the distribution of pixel values measured. The parameters of the noise probability density function (PDF)can be achieved to some extent the properties of the sensor. But, we need to estimate the parameters for imaging settings. Ifwe assume that the PDF of noise is approximately Gaussian, then we need only to estimate the mean and variance becausethe Gaussian PDF with only two parameters is determined. In fact, in many cases, PDF of noise is not Gaussian and it hasunknown distribution. In this study, we introduce a generalized probability density function for modeling noise in imagesand propose a method to estimate its parameters. Because the generalized probability density function has multipleparameters, so use common parameter estimation techniques such as derivative method to maximize the likelihood functionwould be extremely difficult. In this study, we propose the use of evolutionary algorithms for global optimization. Theresults show that this method accurately estimates the probability density function parameters.
Simulation and Comparison of Efficency in Pathfinding algorithms in Games
Authors: Noori Azad , Moradi Farzad
Published: March 2017

There are several routes to go from point A to point B in many computer games and computer player have to choose the best route. To do this, the pathfinding algorithms is used. Currently, several algorithms have been proposed for routing in games so that the general challenges of them is high consumption of memory and a long Execution time. Due to these problems, the development and introduction of new algorithms will be continued. At the first part of this article, in addition to basic and important used algorithms, the new algorithm BIDDFS is introduced.In the second part, these algorithms in the various modes, are simulated on 2D-Grid, and compared based on their efficency (memory consumption and execution time) , Simulated algorithms include: Dijkstra, Iddfs, Biddfs, Bfs (Breadth), Greedy Best First Search, Ida*, A*, Jump point search, HPA*.
Compensation of Voltage disturbances in hybrid AC/DC Microgrids using series converter
Authors: Dehnavi Saeed Daneshvar , Shayani Ehsan
Published: March 2017

In this paper a series power electronic converter is proposed to improve power quality of AC/DC hybrid microgrids. An injection transformer which is series with AC microgrid is used beside the series converter to inject voltage for the purpose of voltage disturbances compensation. The series converter by using a simple and effective control system in stationary reference framework of d-q-0 is proposed to compensate voltage sag and swell, source unbalanced voltages, voltage harmonics of the utility. In these types of micrigrids a lot of voltage disturbances have occurred due to large number of converters. Moreover, it is not required to use a storage energy system like battery; the required power is supplied by DC microgird, so the proposed system is very efficient. Simulation results in the MATLAB/Simulink environment have verified the appropriate performance of the proposed method.
Employing Interface Compensators to Enhance the Power Quality In Hybrid AC/DC Microgrids
Authors: Dehnavi Saeed Daneshvar , Shahparasti Mahdi , Simab Mohsen , Mortazavi Seyed Mohammad Bagher
Published: March 2017

After the introduction of distributed generators, regarding the challenges these networks face, employing AC/DC Hybrid microgrids would be an undeniable issue due to its many advantages and it will certainly find a significant position. Thus, discussing the power quality in this type of microgrids and clean power for feeding the load via this microgrid is a drastic challenge. This paper proposing a hybrid microgrid with 2 interface converters, one placed in series and the other placed in parallel, tries to accomplish these control objectives in an AC microgrid in order to improve power quality: input sine current with Cosϕ=1 and output sine voltage with normal value when source voltage is abnormal and non-sinusoidal, besides, non-linear loads’ presence. Simulation results verify the favorable performance of converters and effective functionality of control systems.
Design and analysis of energy transfer system through Inductive Power Transfer (IPT) connected to a solar panel
Authors: Najafi Naeim , Rajaei Amirhossein , Mardaned Mohammad
Published: March 2017

In this article, Inductive Power Transfer (IPT) system fed by a suggested panel and its various stages of design and analysis are described. Typically, IPT with its separate control system, and solar panel with its separate Maximum power point tracking (MPPT) unit works together to achieve maximum efficiency. This use of two separate converters reduces the efficiency and reliability of the entire system. Therefore, a system is recommended so that while eliminating the MPPT unit and considering design considerations, we can make MPPT function occur in the IPT control circuit. Simulation of the conventional and the proposed system shows that with removal of MPPT, the system efficiency increases from 90% to 93%.