bluuebunny/crossref_metadata_2025 huggingface dataset:
Mass spectral characterization of primary emissions and implications in source apportionment of organic aerosol
Authors: Xu Weiqi , He Yao , Qiu Yanmei , Chen Chun , Xie Conghui , Lei Lu , Li Zhijie , Sun Jiaxing , Li Junyao , Fu Pingqing , Wang Zifa , Worsnop Douglas R. , Sun Yele
Published: June 2020

Abstract. Source apportionment of organic aerosol (OA) from aerosol mass spectrometer (AMS) or aerosol chemical speciation monitor (ACSM)
measurements relies largely upon mass spectral profiles from different source emissions. However, the changes in mass spectra of primary emissions
from AMS–ACSM with the newly developed capture vaporizer (CV) are poorly understood. Here we conducted 21 cooking, crop straw, wood, and coal
burning experiments to characterize the mass spectral features of OA and water-soluble OA (WSOA) using SV-AMS and CV-ACSM. Our results show overall
similar spectral characteristics between SV-AMS and CV-ACSM for different primary emissions despite additional thermal decomposition in CV, and the
previous spectral features for diagnostics of primary OA factors are generally well retained. However, the mass spectral differences between OA and
WSOA can be substantial for both SV-AMS and CV-ACSM. The changes in f55 (fraction of m∕z 55 in OA) vs. f57, f44
vs. f60, and f44 vs. f43 in CV-ACSM are also observed, yet the evolving trends are similar to those of SV-AMS. By applying the source
spectral profiles to a winter CV-ACSM study at a highly polluted rural site in the North China Plain, the source apportionment of primary OA was much
improved, highlighting the two most important primary sources of biomass burning and coal combustion (32 % and 21 %). Considering the rapidly
increasing deployments of CV-ACSM and WSOA studies worldwide, the mass spectral characterization has significant implications by providing essential
constraints for more accurate source apportionment and making better strategies for air pollution control in regions with diverse primary emissions.
Vlasov simulation of electrons in the context of hybrid global models: A Vlasiator approach
Authors: Battarbee Markus , Brito Thiago , Alho Markku , Pfau-Kempf Yann , Grandin Maxime , Ganse Urs , Papadakis Konstantinos , Johlander Andreas , Turc Lucile , Dubart Maxime , Palmroth Minna
Published: June 2020

Abstract. Modern investigations of dynamical space plasma systems such as magnetically complicated topologies within the Earth's magnetosphere make great use of supercomputer models as well as spacecraft observations. Space plasma simulations can be used to investigate energy transfer, acceleration, and plasma flows on both global and local scales. Simulation of global magnetospheric dynamics requires spatial and temporal scales achievable through magnetohydrodynamics or hybrid-kinetic simulations, which approximate electron dynamics as a charge-neutralizing fluid. We introduce a novel method for Vlasov-simulating electrons in the context of a hybrid-kinetic framework in order to examine the energization processes of magnetospheric electrons. Our extension of the Vlasiator hybrid-Vlasov code utilizes the global simulation dynamics of the hybrid method whilst modelling snapshots of electron dynamics on global spatial scales and temporal scales suitable for electron physics. Our model is shown to be stable both for single-cell and small-scale domains, and the solver successfully models Langmuir waves and Bernstein modes. We simulate a small test-case section of the near-Earth magnetotail plasma sheet region, reproducing a number of electron distribution function features found in spacecraft measurements.
Variability of the Surface Energy Balance in Permafrost Underlain Boreal Forest
Authors: Stuenzi Simone Maria , Boike Julia , Cable William , Herzschuh Ulrike , Kruse Stefan , Pestryakova Ljudmila , Schneider v. Deimling Thomas , Westermann Sebastian , Zakharov Evgenii , Langer Moritz
Published: June 2020

Abstract. Boreal forests in permafrost regions make up around one-third of the global forest cover and are an essential component of regional and global climate patterns. Further, climatic change can trigger extensive ecosystem shifts such as the partial disappearance of near surface permafrost or changes to the vegetation structure and composition. Therefore, our aim is to understand how the interactions between the vegetation, permafrost, and the atmosphere stabilize the forests and the underlying permafrost. Existing model set-ups are often static or are not able to capture important processes such as the vertical structure or the leaf physiological properties. There is a need for a physically based model with a robust radiative transfer scheme through the canopy. A one-dimensional land surface model (CryoGrid) is adapted for the application in vegetated areas by coupling a multilayer canopy model (CLM-ml v0) and is used to reproduce the energy transfer and thermal regime at a study site (N 63.18946, E 118.19596) in mixed boreal forest in Eastern Siberia. We have in-situ soil temperature and radiation measurements, to evaluate the model and demonstrate the capabilities of a coupled multilayer forest-permafrost model to investigate the vertical exchange of radiation, heat, and water. We find that the forests exert a strong control on the thermal state of permafrost through changing the radiation balance and snow cover phenology. The forest cover alters the surface energy balance by inhibiting over 90 % of the solar radiation and suppressing turbulent heat fluxes. Additionally, our simulations reveal a surplus in longwave radiation trapped below the canopy, similar to a greenhouse, which leads to a comparable magnitude in storage heat flux to that simulated at the grassland site. Further, the end of season snow cover is three times greater at the forest site and the onset of the snow melting processes are delayed.
The importance of input data quality and quantity in climate field reconstructions – results from the assimilation of various tree-ring collections
Authors: Franke Jörg , Valler Veronika , Brönnimann Stefan , Neukom Raphael , Jaume-Santero Fernando
Published: June 2020

Abstract. Differences between paleoclimatic reconstructions are caused by two
factors: the method and the input data. While many studies compare
methods, we will focus in this study on the consequences of the
input data choice in a state-of-the-art Kalman-filter paleoclimate data
assimilation approach. We evaluate reconstruction quality in the
20th century based on three collections of tree-ring records: (1)
54 of the best temperature-sensitive tree-ring chronologies chosen
by experts; (2) 415 temperature-sensitive tree-ring records chosen
less strictly by regional working groups and statistical screening;
(3) 2287 tree-ring series that are not screened for climate
sensitivity. The three data sets cover the range from small sample
size, small spatial coverage and strict screening for temperature
sensitivity to large sample size and spatial coverage but no
screening. Additionally, we explore a combination of these data sets
plus screening methods to improve the reconstruction quality. A large, unscreened collection generally leads to a poor
reconstruction skill. A small expert selection of extratropical
Northern Hemisphere records allows for a skillful high-latitude
temperature reconstruction but cannot be expected to provide
information for other regions and other variables. We achieve the
best reconstruction skill across all variables and regions by
combining all available input data but rejecting records with
insignificant climatic information (p value of regression model >0.05) and removing duplicate records. It is important to use
a tree-ring proxy system model that includes both major growth
limitations, temperature and moisture.
Tropical cyclones vertical structure from GNSS radio occultation: an archive covering the period 2001–2018
Authors: Lasota Elżbieta , Steiner Andrea K. , Kirchengast Gottfried , Biondi Riccardo
Published: June 2020

Abstract. Tropical Cyclones (TC) are natural destructive phenomena, which affect wide tropical and subtropical areas every year. Although the correct prediction of their tracks and intensity has improved over recent years, the knowledge about their structure and development is still insufficient. The Global Navigation Satellite System (GNSS) Radio Occultation (RO) technique can provide a better understanding of the TC because it enables to probe the atmospheric vertical structure with high accuracy, high vertical resolution, and global coverage in any weather conditions. In this work, we create an archive of co-located TC best tracks and RO profiles covering the period 2001–2018 and providing a complete view of the storms since the pre-cyclone status to the cyclone disappearance. We collected 1822 TC best tracks from the International Best Track Archive for Climate Stewardship and co-located them with 48313 RO profiles from seven satellite missions processed by Wegener Center for Climate and Global Change. We provide information about location and intensity of the TC, RO vertical profiles co-located within 3 hours and 500 km from the TC eye centre, and exact information about temporal and spatial distance between the TC centre and the RO mean tangent point. A statistical analysis shows how the archive well covers all the ocean basins and all the intensity categories. We finally demonstrate the application of this dataset to investigate the vertical structure for one TC example case. All the data files, separately for each TC, are publicly available in NetCDF format at https://doi.org/10.25364/WEGC/TC-RO1.0:2020.1 (Lasota et al., 2020).
Graphically interpreting how incision thresholds influence topographic and scaling properties of modeled landscapes
Authors: Theodoratos Nikos , Kirchner James W.
Published: June 2020

Abstract. We examine the influence of incision thresholds on topographic and scaling properties of landscapes that follow a landscape evolution model (LEM) with terms for stream-power incision, linear diffusion, and uniform uplift. Our analysis uses three main tools. First, we examine the graphical behavior of theoretical relationships between curvature and the steepness index (which depends on drainage area and slope). These relationships plot as straight lines for the case of steady-state landscapes that follow the LEM. These lines have slopes and intercepts that provide estimates of landscape characteristic scales. Such lines can be viewed as counterparts of slope–area relationships, which follow power laws in detachment-limited landscapes, but not in landscapes with diffusion. We illustrate the response of these curvature–steepness-index lines to changes in the values of parameters. Second, we define a Péclet number that quantifies the competition between incision and diffusion, while taking the incision threshold into account. We examine how this Péclet number captures the influence of the incision threshold on the degree of landscape dissection. Third, we characterize the influence of the incision threshold using a ratio between it and the steepness index. This ratio is a dimensionless number in the case of the LEM that we use, and reflects the fraction by which the incision rate is reduced due to the incision threshold; in this way, it quantifies the relative influence of the incision threshold across a landscape. These three tools can be used together to graphically illustrate how topography and process competition respond to incision thresholds.
Superparameterised cloud effects in the EMAC general circulation model (v2.50) – influences of model configuration
Authors: Rybka Harald , Tost Holger
Published: June 2020

Abstract. A new module has been implemented in the fifth generation of the ECMWF/Hamburg (ECHAM5)/Modular Earth Submodel System (MESSy) Atmospheric Chemistry (EMAC) model that simulates cloud-related processes on a much smaller grid. This so-called superparameterisation acts as a replacement for the convection parameterisation and large-scale cloud scheme. The concept of embedding a cloud-resolving model (CRM) inside of each grid box of a general circulation model leads to an explicit representation of cloud dynamics. The new model component is evaluated against observations and the conventional usage of EMAC using a convection parameterisation. In particular, effects of applying different configurations of the superparameterisation are analysed in a systematical way. Consequences of changing the CRM's orientation, cell size and number of cells range from regional differences in cloud amount up to global impacts on precipitation distribution and its variability. For some edge case setups, the analysed climate state of superparameterised simulations even deteriorates from the mean observed energy budget. In the current model configuration, different climate regimes can be formed that are mainly driven by some of the parameters of the CRM. Presently, the simulated total cloud cover is at the lower edge of the CMIP5 model ensemble. However, certain “tuning” of the current model configuration could improve the slightly underestimated cloud cover, which will result in a shift of the simulated climate. The simulation results show that especially tropical precipitation is better represented with the superparameterisation in the EMAC model configuration. Furthermore, the diurnal cycle of precipitation is heavily affected by the choice of the CRM parameters. However, despite an improvement of the representation of the continental diurnal cycle in some configurations, other parameter choices result in a deterioration compared to the reference simulation using a conventional convection parameterisation. The ability of the superparameterisation to represent latent and sensible heat flux climatology is independent of the chosen CRM setup. Evaluation of in-atmosphere cloud amounts depending on the chosen CRM setup shows that cloud development can significantly be influenced on the large scale using a too-small CRM domain size. Therefore, a careful selection of the CRM setup is recommended using 32 or more CRM cells to compensate for computational expenses.
Towards an objective assessment of climate multi-model ensembles – a case study: the Senegalo-Mauritanian upwelling region
Authors: Mignot Juliette , Mejia Carlos , Sorror Charles , Sylla Adama , Crépon Michel , Thiria Sylvie
Published: June 2020

Abstract. Climate simulations require very complex numerical models.
Unfortunately, they typically present biases due to parameterizations,
choices of numerical schemes, and the complexity of many physical processes.
Beyond improving the models themselves, a way to improve the performance of
the modeled climate is to consider multi-model combinations. In the present
study, we propose a method to select the models that yield a multi-model
ensemble combination that efficiently reproduces target features of the
observations. We used a neural classifier (self-organizing maps), associated with a multi-correspondence analysis to identify the models that best
represent some target climate property. We can thereby determine an
efficient multi-model ensemble. We illustrated the methodology with results
focusing on the mean sea surface temperature seasonal cycle in the Senegalo-Mauritanian region. We compared 47 CMIP5 model configurations to
available observations. The method allows us to identify a subset of CMIP5
models able to form an efficient multi-model ensemble. The future decrease
in the Senegalo-Mauritanian upwelling proposed in recent studies is then revisited using this multi-model selection.
Highly stable magic angle spinning spherical rotors
Authors: Osborn Popp Thomas M. , Däpp Alexander , Gao Chukun , Chen Pin-Hui , Price Lauren E. , Alaniva Nicholas H. , Barnes Alexander B.
Published: June 2020

Abstract. The use of spherical rotors for magic angle spinning offers a number of advantages, including improved sample exchange, efficient microwave coupling for dynamic nuclear polarization nuclear magnetic resonance (NMR) experiments, and, most significantly, high frequency and stable spinning with minimal risk of rotor crash. Here we demonstrate the simple retrofitting of a commercial NMR probe with MAS spheres for solid-state NMR. We analyze a series of turbine groove geometries to investigate the importance of the rotor surface for spinning performance. Of note, rotors lacking any surface modification spin rapidly and stably even without feedback control. The high stability of a spherical rotor about the magic angle is shown to be dependent on its inertia tensor rather than the presence of turbine grooves.
Structure and kinematics of an extensional growth fold, Hadahid Fault System, Suez Rift, Egypt
Authors: Jackson Christopher A.-L. , Whipp Paul S. , Gawthorpe Robert L. , Lewis Matthew M.
Published: June 2020

Abstract. Normal faulting drives extensional growth folding of the Earth's upper crust
during continental extension, yet we know little of how fold geometry
relates to the structural segmentation of the underlying fault. We use field
data from the Hadahid Fault System, Suez Rift, Egypt, to investigate the
geometry and kinematics of a large (30 km long, up to 2.5 km displacement),
exceptionally well-exposed normal fault system and to test and develop models
for extensional growth folding. The Hadahid Fault System comprises eight up
to 5 km long segments that are defined by unbreached or breached monoclines.
These segments are soft-linked, hard-linked, or defined by a more subtle
along-strike transition in overall structural style. High overlap : separation
(O:S) ratios between its segments suggest the Hadahid Fault System comprises
a single, now hard-linked structure at depth. We demonstrate that a
progressive loss of at-surface displacement along-strike of the Hadahid
Fault System results in surface-breaking faults and breached monoclines
being replaced by unbreached monoclines developed above blind faults.
However, shorter along-strike length-scale variations in structural style
also occur, with unbreached monoclines developed between breached
monoclines. The origin of this variability is unclear, but it might reflect
local variations in host rock material properties that drive short
length-scale variations in fault propagation-to-slip ratio, and thus the
timing and location of fold breaching. We show that folding is a key
expression of the strain that accumulates in areas of continental extension, arguing that tectono-sedimentary models for rift development should
capture the related structural complexity.
The most similar predictor – on selecting measurement locations for wind resource assessment
Authors: Bechmann Andreas , Leon Juan Pablo M. , Olsen Bjarke T. , Hristov Yavor V.
Published: June 2020

Abstract. We present the most similar-method for conducting wind resource assessments with multiple wind measurements and for the optimal design of measurement campaigns. Wind resource assessment is generally done by extrapolating a measured and long-term corrected wind climate at one location to a new location using a flow model. If several measurement locations are available, standard industry practice is to make a weighted average of all the predictions using inverse-distance weighting. The most similar-method challenges this practice. Instead of weighting several predictions, the method only selects the measurement location evaluated most similar. We validate the new approach by comparing against measurements from 185 met masts from 40 wind farm sites and show improvements compared to inverse-distance weighting. Compared to using the closest measurement location, the error of power density predictions is reduced by 13 % using inverse-distance weighting and 34 % using the most similar-method.
First characterization of a new perturbation system for gust generation: the chopper
Authors: Neunaber Ingrid , Braud Caroline
Published: June 2020

Abstract. We present a new system for the generation of rapid, strong flow perturbations in the aerodynamic wind tunnel at École Centrale de Nantes. The system is called the chopper, and it consists of a rotating bar cutting through the inlet of a wind tunnel test section, thus generating an inverse gust that travels downstream. The flow generated by the chopper is investigated with respect to the rotational frequency using an array equipped with hot-wires that is traversed downstream in the flow field. It is found that the gust can be described as a superposition of the mean gust velocity, an underlying gust shape, and additional turbulence. Following this approach, the evolution of the mean gust velocity and turbulence intensity are presented, and the evolution of the underlying inverse gust shape is explained. The turbulence is shown to be characterized by an integral length scale of approximately half the chopper blade width and a turbulence decay according to E(f)∝f-5/3.
APRENDIZAGEM E GESTÃO DO CONHECIMENTO: UMA ABORDAGEM SOBRE A ESCOLA QUE APRENDE
Authors: Calvi Gabriel Coutinho , De Almeida Iara Carnevale , Dal Forno Letícia Fleig
Published: June 2020

O presente artigo pretende discutir a relação entre a aprendizagem e a gestão do conhecimento pautada pela teoria da “Escola que aprende” de Peter Senge. A metodologia foi por meio de pesquisa bibliográfica exploratória, aplicando o protocolo RSL. Numa primeira fase é explorado o universo da teoria da “Escola que aprende”, que envolve escola, professores, alunos e pais, para discutir as ligações existentes entre eles e sua relevância para a edificação da sociedade do conhecimento. Na sequência, ocorre a apropriação da gestão do conhecimento e dos conceitos de capital – interno, externo e intelectual – para discutir a formação do conhecimento em benefício da evolução da vida social como um todo. Como resultado desta pesquisa, pode-se salientar a tarefa do docente na atual sociedade e a sua importância para o desenvolvimento dos alunos e, por consequência, da sociedade aprendente.
Earning Management and the Effect Characteristics of Audit Committee, Independent Commissioners: Evidence From Indonesia
Authors: Handriani Eka
Published: June 2020

This study examines whether companies listed Indonesia Stock Exchange conduct efficient or opportunistic earning management and to investigate the effect the Independent Commissioner and the Characteristics of the Audit Committee (measured by Auditor Size, Independence, Expertise, and Activities) on it. The sample consists of 186 observations of manufacturing companies in Indonesia Stock Exchange during the 2013-2018. Using Panel Regression Fixed Effect method, we find evidence that Independent Commissioners has a significant effect on reducing Earnings Management. The Positive Accounting Theory-the efficient perspective occurs when the compensation contract and internal control system, including monitoring by the board of commissioners, will limit the common view opportunistic manager and motivate the manager to choose the right accounting policy. The effective monitoring conducted by an independent commissioner can reduce agency costs because management prioritizes the best interest of shareholders by maximizing company resources. Furthermore, it was found that Audit Committee Size can reduce earning management. It is due to the wide range of skills of audit committee members in exercising oversight on management. Audit Committees with accounting and financial expertise can reduce earnings management. This finding indicates that the Audit Committee may tend to uphold conservative as accounting mechanism. Accounting conservatism has an important role in restricting opportunistic management behavior.
Optimizing Logistics System to Serve Vietnam's Rice Export Strategy
Authors: Pham Van Tai
Published: June 2020

Vietnam is a country with strengths in agricultural production, rich and valuable agricultural products. Vietnam is often described as a giant boom with two big granaries at both ends, the Red River Delta and the Mekong Delta. Besides, the appropriate weather and climate conditions and fertile soil have created an ideal environment for rice production, thereby making rice a strong export item for Vietnam. In order to boost export rice output, the role of the transport and logistics system is very important. If the transport system is equipped and linked together, it will create added value for the components of the system, while reducing transport costs, warehousing costs, distribution, and circulation, ... increase farmers' income, profits for businesses, create great export value for the country. One of the most important tasks to achieve this goal is to optimize Vietnam's rice export system. This issue is always urgent, not only for the executive agency, macro-management of the State but also for organizations, businesses, ... involved in the production and export of rice. This paper focuses on analyzing and assessing the current situation of Vietnam's export rice transport system and forecasting the future in each period. From there, select the basic parameters (or criteria) to build the optimal export rice transport system. The author has built a general and specific model for 02 transshipment scenarios including scenario 1 is Saigon port, scenario 2 is Saigon port and Can Tho port. The core of the paper is a detailed calculation with 05 options for each scenario, based on the selected basic parameters, with the LINGO 13.0 FOR WINDOWS software. From there, identify and select the most optimal plan for Vietnam's export rice transport system in general and the Mekong Delta in particular.
Teaching a Student with Poor Performance in Mathematics to Recall of Multiplication Facts Using Simultaneous Prompting with Systematic Review and Corrective Feedback
Authors: Sönmez Nesrin , Alptekin Serpil
Published: June 2020

In this study, it was aimed to determine the effects of the Simultaneous Prompting (SP) package jointly with the systematic review and corrective feedback in teaching a student with poor performance in mathematics to recall the multiplication facts. One of the single subject designs, the multiple probes design across behaviors (sets) is used in this study. The participant is an 11 years old female student at the 6th grade who has not been diagnosed with any disability but has been getting support because of her poor performance in mathematics than her peers. The dependent variable of this study is the skill of recall multiplication facts with the sets of 3, 5 and 8. The independent variable of the study is the SP package jointly with the systematic review and corrective feedback. Results show that the SP was effective in teaching the student with low mathematical performance to the skill of recall the multiplication facts. The student generalized the learned multiplication facts to another teacher and different setting and maintained her performance on the 15th and 45th days following the systematic reviews. Considering the findings of social validity, it has been determined that the teacher presented positive opinions, as she became happy with that achievement and the method is a way, which can be adopted and implemented by all teachers. These results indicate the acceptability of the SP package and results of the study are highly meaningful. Implications and future research needs are discussed.
“Finola” Cannabis Cultivation for Cannabinoids Production in Thessaloniki-Greece
Authors: Fadel Dani , Assaad Najoie , Alghazal Gabriel , Hamouche Zeinab , Lazari Diamanto
Published: June 2020

Cannabis has garnered a great deal of new attention in the past couple of years due to the increasing hopes of its legalization for recreational use and indications for medicinal benefit. The increasing consumption and cultivation has led to a multiplication of scientific studies. Focus was placed in this study foremost on yielding morphological data (length of the plant, inflorescence fresh and dry weight) for appropriate mechanical harvest and biochemical cannabinoids analysis of the industrial cannabis “Finola” that is newly grown in Greece. The average, standard error and the coefficient of variation were estimated in case of necessity and the correlation among all results was done using Microsoft Excel 2010 and Minitab 19 Software. Furthermore, three chemical analyses for TLC and NMR techniques were applied for analysis. The Cannabinoid quality or chemotype analysis was also calculated. After extraction and isolation of cannabinoids using ethanol and other separation compounds, cannabinoid acids, tetrahydrocannabinol (THC), cannabidiol (CBD) and some other cannabinoids were extracted, isolated, identified and isolated with no delays or limitations. Finola cannabis provided a scientific background that may be considered by the Lebanese growers to accelerate and improve the relative mentality and to provide a collection of relevant scientific information, upon which the field of cannabis analysis can continue to grow.
Opportunities and Specifics Underlying Day Care for Older Adults in Hungary with Consideration of Active Ageing
Authors: Vajda Kinga
Published: June 2020

In the past few decades, ageing has become a serious global issue. The concept of active aging and its incorporation into different type of social services (e.g. day care for elderly people) is one of the possible solutions. The main goal of this research was to evaluate the status of clients in Hungarian day care institutions. Another important goal is to explore which domains of the concept of active and independent ageing were already considered and applied in Hungarian day care service and where they should be strengthened. The questionnaire was based on the Active Ageing Index questionnaire (ZAIDI et al. 2013). 14% of the observed sample was 64 years old or younger, 38% was 65–74 years old, 36% was 75–84 years old, 12% was 85 years old or older. Most of the participants (74%) were women. More than half of the sample were widowed. One third of the sample received some kind of ICT (Information and Communication Technology) device. There was a strong connection between the frequency of ICT usage and education variables. Accessibility, which was also a facilitator of active and independent ageing, came up only in 25% of the sample. Mental well-being – as a new variable – was analyzed with principle component analysis from five former variables with the highest rate in the Central Hungarian region. Satisfying physical security was reported by only 56% of the sample, more often among men (p = 0.03). Reinforcing the preventive aspect of the service, propagating it amongst freshly retired people, and including not only widows, but other potential clients as well could be the key points of service development. To intensify the potential points in the service connected to active ageing (accessibility, volunteering in late-life, use of ICT devices etc.) could be a key factor in the improvement of day care services.
Desenvolvimento de Sistema Computacional para Aquisição e Analise de Dados Ambientais Remotamente
Authors: Ferreira Junior Jucivaldo , Ferreira Rardiles , Da Silva Rodrigo , Da Silva Julio , De Souza Samuel
Published: June 2020

Desde a sua criação, o sistema Android chama atenção por sua flexibilidade, o uso de um código aberto que permite personalizações e as mais diversas aplicações e a gratuidade. Este trabalho é resultado da aplicação desta plataforma nas ciências atmosféricas denominado Sistema de Aquisição de Dados Remotos (S.A.R.D). O objetivo do projeto é auxiliar na difusão de dados de troca de massa e fluxos de energia entre a Biosfera e a atmosfera na Floresta Nacional do Tapajós (TNF). O S.A.D.R foi pensando visando o compartilhamento de dados a partir da WebService e a integração de sensores em uma base de dados única que pode ser acessada de qualquer lugar em tempo real e em dispositivos móveis.O S.A.D.R foi desenvolvido em linguagem Java e está integrado com o WebService usando a linguagem PHP.Para manter as transições contínuas dos dados foi implementado o protocolo de transferência de hipertexto (HTTP) entre os sensores de medida. Os testes realizados incluíram teste de chamadas de dados periódicos e acesso múltiplo para a plataforma. Os resultados não mostraram anomalias no serviço de transporte de dados. A principal vantagem é a otimização de idas ao campo de pesquisa e a atualização do banco de dados com maior frequência.
Testando a Diversão em um Jogo Sério para o Aprendizado Introdutório de Programação
Authors: Vahldick Adilson , Mendes António , Marcelino Maria José , Hogenn Maciel , Schoeffel Pablo
Published: June 2020

Este artigo descreve um jogo sério para o aprendizado introdutório de programação e sua experimentação com uma turma de 16 alunos. O jogo abrange os assuntos de sequenciamento de ações, variáveis e condicionais. A solução é desenvolvida com blocos gráficos, tal como no Scratch. O objetivo da experimentação foi identificar os pontos fracos do jogo em promover a diversão. O instrumento utilizado para aferir essa qualidade chama-se EGameFlow que permitiu medí-lo em seis dimensões: concentração, clareza dos objetivos, feedback, desafios, autonomia e imersão. Os resultados demonstraram que a imersão é a dimensão mais fraca e nas conclusões apresentamos sugestões de melhorias.
O Universo Lúdico da Programação de Computadores com Logo no Ensino Fundamental
Authors: Sousa Aline , Silva Sivaldo , Raiol Alberto , Sarges João , Bezerra Fábio
Published: June 2020

Criar um programa de computador exige habilidades como a ordenação do pensamento, pensamento abstrato, resolução de problemas e racioc ínio lógico e matemático. Promover o contato de alunos do ensino fundamental com o universo da programação de computadores é uma oportunidade de estimular, de forma mais acelerada, o desenvolvimento dessas habilidades. Este artigo relata a experiência que alunos do ensino fundamental de duas escolas públicas em Belém-PA tiveram com a programação de computadores. No caso, alunos do sétimo e oitavo anos assistiram aulas de Logo no ambiente KTurtle. Observamos que os alunos que tiveram contato com essa experiência melhoraram o desempenho na disciplina de matemática. Esperamos que relatos como os apresentados neste artigo estimulem a adoção da disciplina de programação de computadores na grade curricular de alunos do ensino fundamental.
Resgatando a Linguagem de Programação Logo: Uma Experiência com Calouros no Ensino Superior
Authors: Raiol Alberto , Sarges João , Souza Aline , Silva Sivaldo , Bezerra Fábio
Published: June 2020

A programação de computadores é uma atividade complexa e por isso incomoda muitos alunos que iniciam seus estudos em informática. Essa realidade acaba elevando os índices de repetência e evasão nos cursos superiores da área de computação. O presente trabalho apresenta uma proposta bem sucedida de ensino de programação de computadores desenvolvida com os calouros do curso de sistemas de informação, utilizando a linguagem de programação Logo como ferramenta de ensino. Nas duas experiências relatadas no trabalho, observamos que a participação dos alunos nas oficinas contribuiu para melhorar o desempenho em disciplina introdutória de programação, sendo que, essa melhora foi mais notável na primeira intervenção, onde os participantes se demostraram mais motivados.
O Ensino de Computação na Educação Básica apoiado por Problemas: Práticas de Licenciandos em Computação
Authors: Araújo Débora , Rodrigues Ariane , Silva Cláudia , Soares Leonardo
Published: June 2020

Este artigo relata a experiência, com ênfase na prática docente, vivenciada pelos licenciandos em Computação da Universidade de Pernambuco, campus Garanhuns, durante a disciplina de Prática IV. Um minicurso de lógica de programação foi planejado e executado conforme os princípios da metodologia PBL, do inglês, Problem Based Learning (Aprendizagem Baseada em Problemas) com o objetivo de estimular o pensamento computacional em crianças do ensino fundamental. O minicurso fez uso de desafios da Computação Desplugada e na plataforma Scratch. Os desafios e lições aprendidas acerca da adoção de uma nova metodologia de ensino são relatados sob a ótica dos licenciandos.
Aluno Surdo na Ciência da Computação: Discutindo os Desafios da Inclusão
Authors: Boscarioli Clodis , Galante Guilherme , Oyamada Marcio , Zara Reginaldo , Vilwock Rosangela
Published: June 2020

Este trabalho relata desafios encontrados na inclusão de alunos surdos no ensino da Computação e resultam da observação da trajetória de um acadêmico matriculado no Curso de Ciência da Computação. Os desafios apresentados e as ações desencadeadas não têm por objetivo fundamentar uma teoria abrangente ou mesmo estatística, mas sim suscitar discussão reflexiva frente às suas especificidades. Dado o aumento do número de alunos com essa deficiência no ensino superior, é importante que esses desafios estejam claros para que as universidades possam se adequar a esta realidade.
A formação didático pedagógica do docente da área de computação: um estudo de caso em uma Universidade Brasileira
Authors: Massa Mônica
Published: June 2020

Este artigo busca aprofundar o olhar sobre o docente do ensino superior, especificamente na área de computação e informática, e investigar a compreensão sobre sua formação didática e pedagógica. Os resultados aqui apresentados fazem parte do projeto de doutorado desenvolvido pela autora e concluído em julho de 2014. Optou-se pelo Estudo de Caso como método, incluindo sete docentes da área da UNEB – Campus II. Para a coleta dos dados, foram aplicadas as técnicas de entrevista, grupo focal, história de vida e análise documental. Os resultados obtidos indicam que a maioria dos docentes da área da computação não teve formação pedagógica, aplicando alternativas intuitivas para a mediação didática em sala de aula.
Um Estudo sobre a Evasão no Curso de Licenciatura em Informática do IFRN – Campus Natal – Zona Norte
Authors: Souza Odair , Morais Pauleany , Silva Júnior Francisco
Published: June 2020

Este artigo apresenta um estudo sobre a evasão no Curso de Licenciatura em Informática do IFRN – Campus Natal – Zona Norte. A partir da análise das características da evasão nos cursos de licenciatura oferecidos nas Instituições de Ensino Superior (IES) públicas, um questionário foi elaborado e disponibilizado em um website desenvolvido exclusivamente para esta pesquisa, com o objetivo de conhecer o perfil dos alunos desistentes e as razões que os levaram a abandonar o curso. Os resultados confirmam o que outros estudos já apresentaram: a evasão está relacionada a uma grande variedade de fatores, como a escolha equivocada do curso e a dificuldade em conciliar trabalho e estudos, dentre outros.
Saci – ainda outro ambiente para o ensino de programação
Authors: Anido Ricardo
Published: June 2020

Este artigo apresenta um sistema integrado para o ensino e aprendizagem de programação de computadores. O sistema, chamado Saci, compreende um subsistema de gerência de usuários, um subsistema de gerência de aulas, e o ambiente de aprendizagem propriamente dito, implementado como um aplicativo Web de página única. O ambiente de aprendizagem incorpora ferramentas para visualização do conteúdo da aula (vídeo, documentos de apoio), edição do programa-fonte, execução e verificação da correção do programa, além de ferramentas de ajuda ao aluno. Após o carregamento de uma “aula”, pré-montada por um professor, no navegador Web de um aluno, todo o processamento ocorre no navegador, não sendo necessária nenhuma configuração ou instalação no computador do aluno. Um primeiro curso utilizando o sistema Saci, de introdução `a programação de computadores usando Javascript, foi disponibilizado na página da Olimpíada Brasileira de Informática em meados de marc¸o.
Robô para Reconstrução Tridimensional: Uma aplicação didático-pedagógica do protótipo no âmbito da Engenharia e Computação
Authors: Silva João , Cavalcante Michelle , Vaz Fabiano , Viana Esdriane
Published: June 2020

O presente trabalho tem por finalidade mostrar a aplicação educacional de um protótipo de Robô para auxiliar na reconstrução tridimensional. Para tanto, utilizou-se a plataforma Arduino e através desta montou-se um robô controlado por um notebook junto a um Kinect. A ferramenta apresentou potencialidades que são consideradas relevantes no processo de ensino-aprendizagem, principalmente, em áreas multidisciplinares, o que garantiu um incentivo ao aprendizado de acordo com os estudantes, além de propiciar a reconstrução tridimensional que também pode ser utilizada no processo de ensino, a exemplo do uso de reconstruções 3D de isoladores elétricos.
Relato de Experiência de Ensino de Computação no Ensino Fundamental em Estágio Supervisionado da Universidade de Pernambuco no Campus Garanhuns
Authors: Da Silva Sônia , Barbosa Aline , De Souza Anderson , Da Silva Eraylson , De Oliveira Millena , Da Silva Neto Sebastião , Dos Santos Wilk
Published: June 2020

O presente estudo visa refletir sobre a inserção do ensino de Computação na educação básica, bem como relatar uma experiência de um grupo de estagiários de Licenciatura em Computação na docência, em três escolas de uma cidade do agreste pernambucano. Para tal experiência defendeu-se a concepção legal de estágio supervisionado e a inclusão de Computação na educação básica, como campo de interesse de jovens na contemporaneidade. As propostas têm como fonte o K12, numa visão investigativa para lançar propostas ao currículo. Constatou-se o despreparo organizacional e pedagógico das escolas para a inserção da Ciência da Computação em Educação, por desconhecerem o seu potencial para o desenvolvimento dos educandos. A experiência profissional ampliou a visão dos estudantes sobre a docência em sua reflexão sobre a prática, o cotidiano escolar, o currículo e as políticas educacionais que regulam o ensino-aprendizagem na escola.
Uma Abordagem Gamificada para o Ensino de Programação Orientada a Objetos
Authors: Figueiredo Karen , Ribeiro Jivago , Souza Raphael , Angelo Vinicius
Published: June 2020

A aplicação de elementos de design de jogos em contextos não relacionados a jogos é uma prática atual que está sendo explorada na área de computação, nos cenários da indústria e da educação. A gamificação no ensino de conteúdos e disciplinas de programação pode ser vista como uma estratégia contemporânea relevante e poderosa para atrair a atenção dos alunos. Este trabalho propõe uma abordagem gamificada para o ensino de programação orientada a objetos com o objetivo de engajar e motivar os alunos, apresentando o design de um jogo e a experiência da sua aplicação na disciplina Algoritmos III.
Uma ferramenta gamificada de apoio à disciplina introdutória de programação
Authors: Campos André , Gardiman Renato , Madeira Charles
Published: June 2020

O aprendizado da programação de computadores em cursos superiores de computação no Brasil ainda se apresenta como um grande problema para os alunos ingressantes. Para minimizar esse obstáculo, foi desenvolvida uma ferramenta gamificada de auxílio à prática de programação. Este artigo apresenta os resultados de sua aplicação em uma disciplina introdutória de programação. O texto discorre sobre a ferramenta, sua avaliação por parte dos alunos e comportamentos observados nos alunos durante o seu uso ao longo de cinco semestres. Tais comportamentos delinearam o desenvolvimento de uma nova versão da ferramenta.
A Utilização de Kits de Robótica como Ferramenta para o Ensino de Programação à Meninas do Ensino Médio
Authors: Mattos Giorgia , Da Silva Danielle , Moreira Josilene
Published: June 2020

Uma das dificuldades do ingresso de mulheres na área de Ciência da Computação é que, em geral, elas não se sentem aptas nem capazes de lidar com a tecnologia. O presente relato descreve a estratégia de utilização da Robótica como instrumento da capacitação em Programação e da divulgação da Ciência da Computação para meninas, realizada em uma Escola Pública de Ensino Médio na cidade de João Pessoa-PB. A escola disponibilizou os seus kits de robótica para as atividades que foram divididas em duas fases. A fase 1 consistiu na montagem dos robôs e a fase 2 no desenvolvimento de programas que testaram as funcionalidades específicas para o modelo de kit utilizado, como por exemplo como acender os faróis e soar a buzina.
ABILSEN: Uma Abordagem para Inclusão do Licenciado em Computação no Ensino Básico
Authors: Da Silva Neto Sebastião , Santos Higor , Dos Santos Wilk
Published: June 2020

A utilização das Tecnologias de Informação e Comunicação – (TICs) e o ensino de Computação nos espaços escolares têm fomentado discussões sobre novas práticas e métodos para auxiliar no processo de ensino e aprendizagem. Os cursos de Licenciatura em Computação formam profissionais para desenvolver softwares educativos, aplicar TICs na Educação e ensinar Computação nos níveis básico, técnico e profissionalizante. Entretanto, ainda não existe no Brasil a disciplina de Computação no currículo da educação básica. Esta pesquisa apresenta uma abordagem para a inclusão do Licenciado em Computação de forma estruturada e integrada às disciplinas do currículo escolar. Os resultados do estudo empírico demonstram uma alta satisfação da abordagem tanto dos alunos quanto do professor da disciplina.
Sistematização da elaboração da matriz curricular de um curso de Sistemas de Informação: a metodologia dos perfis
Authors: Cardoso Rogério
Published: June 2020

Um curso de graduação nasce e é conduzido por meio de um Projeto Pedagógico de Curso (PPC). Inúmeras variáveis são consideradas durante a sua concepção e elaboração. Pode-se citar a adequação às Diretrizes Curriculares Nacionais (DCN), diretrizes institucionais, regionalidade, flexibilidade, aspectos tecnológicos e vários outros. Dentre seus componentes, a matriz curricular ou simplesmente currículo do curso desempenha um papel de destaque. Entretanto, ela não deve ser considerada apenas como um simples conjunto de disciplinas. A elaboração da matriz de um curso de graduação necessita de embasamento e processo. Este artigo apresenta a sistematização metodológica usada para a elaboração da matriz curricular de um curso de Bacharelado em Sistemas de Informação (BSI). Denominada metodologia dos perfis, o artigo também apresenta desdobramentos, reflexões e ações interdisciplinares decorrentes deste processo.
Análise das Ementas de Estruturas de Dados das Universidades Brasileiras
Authors: Nunes Mariana , Costa Estevan , Feitosa Felipe , Brancher Jacques
Published: June 2020

A presente pesquisa tem por objetivo identificar os conteúdos presentes nas ementas da disciplina de estruturas de dados em cursos de graduação nas áreas de tecnologia da informação (TI), em nível nacional, com vistas a auxiliar docentes e discentes no processo de ensino-aprendizagem. Para isto, foram coletados dados de 112 universidades, com informações sobre o curso e a disciplina, obtendo os conteúdos básicos a serem abordados pelo ambiente, para que possa ser um agente de auxílio para a fixação e retenção dos conteúdos ministrados em universidades, visando a diminuição dos índices de reprova e evasão nesta disciplina.