bluuebunny/crossref_metadata_2025 huggingface dataset:
Numerical Simulation of Unsaturated Soil Water Flow from a Trickle Point System, Considering Evaporation and Root Water Uptake
Authors: Khalil Lina Ali , Abid Maysoon Basheer
Published: April 2019

This research was carried out to study the effect of plants on the wetted area for two soil types in Iraq and predict an equation to determine the wetted radius and depth for two different soil types cultivated with different types of plants, the wetting patterns for the soils were predicted at every thirty minute for a total irrigation time equal to 3 hr. Five defferent discharges of emitter and five initial volumetric soil moisture contents were used ranged between field capacity and wilting point were utilized to simulate the wetting patterns. The simulation of the water flow from a single point emitter was completed by utilized HYDRUS-2D/3D software, version 2.05. Two methods were used in developing equations to predict the domains of the wetting pattern. The principal strategy manages each soil independently and includes plotting, fitting, and communicating relevant connections for wetted zone and profundity, maximum error did not exceed 31.2%, modeling efficiency did not less 0.95, and root mean square error did not surpass 1.43 cm. The second strategy additionally treated each soil independently yet used electronic programming that uses different relapse methods for wetted territory and profundity, the maximum error did not exceed 15.64 %, modeling efficiency did not less 0.98, and root mean square error did not surpass 1.18 cm. a field test was directed to quantify the wetted radius to check the outcome acquired by the software HYDRUS-2D, contrast the estimation and the reproduced by the software. The after effects of the conditions to express the wetted radius and depth regarding the time of water system, producer release, and initial soil moisture content were general and can be utilized with great precision.
Buckling and Pre Stressed Dynamics Analysis of Laminated Composite Plate with Different Boundary Conditions
Authors: Majeed Widad I. , Abed Zainab Abdul Kareem
Published: April 2019

Critical buckling and natural frequencies behavior of laminated composite thin plates subjected to in-plane uniform load is obtained using classical laminated plate theory (CLPT). Analytical investigation is presented using Ritz- method for eigenvalue problems of buckling load solutions for laminated symmetric and anti-symmetric, angle and cross ply composite plate with different elastic supports along its edges. Equation of motion of the plate was derived using principle of virtual work and solved using modified Fourier displacement function that satisfies general edge conditions. Various numerical investigation were studied to exhibit a convergence and accuracy of the present solution for considering some design parameters such as edge conditions, aspect ratio, lamination angle, thickness ratio, orthotropic ratio, the results obtained gives good agreement with those published by other researchers.
The Science of Undetectable Equals Un-Transmittable Plays out in Real Life a Clinical Case Report
Authors: Dickens Alycia T.
Published: April 2019

66-year-old African American man presented to the Infectious Disease Clinic for evaluation and treatment of Hepatitis C. Risk for Hepatitis C was Intravenous Drug Use (IVDU) 20 years earlier. Patient was referred to the Infectious Disease (ID) Clinic by primary care provider. Medical work-up, done by primary care provider, included HIV testing and the patient tested HIV+. Further testing by Infectious Disease Provider showed a cd4 643 @38% and a HIV RNA or HIV Viral Load of 43 copies/ml. Interestingly, this patient was unaware of his HIV (+) status and he is also newly married less than 2 years.
BYPRODUCT THERMOPLASTIC ADDITIVE FOR CONCRETE AND MIXES
Authors: Gumenyuk A N , Yakovlev G I , Polyanskikh I S , Gordina A F , Grakhov V P
Published: April 2019

В статье рассмотрена возможность применения технической серы при создании модифицированных материалов на основе цемента. Применение термопластической добавки, получаемой в виде гидрофильного остатка золь-геля-технологии, основано на возможности равномерного распределения частиц технической серы в объеме материала с последующей термической активацией добавки. Произведен анализ влияния добавки на физико-технические характеристики при модификации цементной матрицы. Продемонстрирована эффективность и универсальность применения данной добавки в различных системах для модификации вяжущих гидравлического и воздушного твердения. Установлено, что введение термопластической добавки повышает прочность, плотность и снижает водопоглощение конечных изделий. Данная разработка является усовершенствованием традиционных технологий по модификации цементных и гипсовых систем. Предлагаемая технология основана на физико-химических взаимодействиях и обусловлена потребностью создания принципиально новых композитов. В частности, благодаря своим уникальным химическим и физическим свойствам, техническая сера имеет достаточный потенциал применения в различных строительных изделиях, используемых в экстремальных условиях эксплуатации. Применение данного инертного модификатора позволяет повысить стойкость цементных систем к сульфатной коррозии без потери прочности.
Simulation Model of Satellite Communication Channel
Authors: Atyeva I R , Zykin A A , Khvorenkov V V
Published: April 2019

Разработана компьютерная модель спутникового канала связи с учетом влияния доплеровского сдвига по частоте и стороннего спутника связи. Компьютерная модель построена в графической среде имитационного моделирования Simulink, которая входит в программный пакет MATLAB. В статье рассматривается имитационная модель спутникового канала связи с использованием сигнала MSK (Minimum Shift Keying). В ходе работы изучены и применены алгоритмы цифровой обработки сигналов при разработке компьютерной модели спутникового канала связи. По заданным параметрам принимаемого сигнала определены основные параметры цифрового демодулятора сигнала MSK, такие как частота повторения бита, частота дискретизации, минимальная разрядность аналого-цифрового преобразователя (АЦП), количество уровней квантования, частота среза цифрового фильтра-дифференциатора. В результате компьютерного моделирования спутникового канала связи было исследовано влияние отстройки по частоте сигнала MSK и уровня мешающего сигнала (стороннего спутника) на помехоустойчивость модема. По результатам моделирования получены графики зависимости вероятности ошибки приема бита от уровня мешающего сигнала и вероятности ошибки от отстройки по частоте. Разработанная компьютерная модель существенно расширяет круг задач, связанных с оперативной оценкой параметров электромагнитной совместимости (ЭМС) и радиоподавления в группировках подвижных РЭС.
A Comparative Performance Analysis of Relaying Data in FANET
Authors: Kaysina I A , Vasil’ev D S , Abilov A V , Meitis D S , Kaysin A E , Nistyuk A I
Published: April 2019

Проанализированы метрики качества обслуживания (QualityofServise-QoS) при ретрансляции потоковых данных в летающей сети на основе протоколов маршрутизации OLSR и AODV. Эффективность передачи потоковых данных в летающей сенсорной сети беспилотных летательных аппаратов (БПЛА) проанализирована аналитически, а также с использованием NetworkSimulator-3 (NS-3) в качестве среды для проведения имитационного моделирования. Все вычисления произведены для трех сценариев. В первом сценарии узел-источник удаляется от узла-получателя на определенное расстояние. Во втором сценарии между узлом-источником и узлом-получателем добавлен летающий узел-ретранслятор, на котором работает один из протоколов маршрутизации, узел-источник также удаляется от узла-получателя. В третьем сценарии узел-ретранслятор летает по кругу с разным радиусом, при этом узел-источник удаляется от узла-получателя. Во всех сценариях приведены сравнительные результаты имитационного моделирования и математических вычислений. В качестве модели распространения сигнала для имитационного моделирования была выбрана Free-SpaceMode. По первому сценарию построен аналитический график зависимости средней частоты ошибок при передаче от энергии на бит. Для всех других сценариев построены графики зависимости среднего коэффициента доставки пакетов от расстояния. По результатам исследований сделан вывод, что применение исследуемых протоколов маршрутизации не обеспечивает приемлемое качество передачи данных в сетях БПЛА, что может привести к невозможности выполнения реальной миссии.
To the Question of Steel Ropes Durability
Authors: Kalentiev E A , Tarasov V V , Novikov V N
Published: April 2019

Рассматривается вопрос оценки долговечности стальных канатов, работающих на блоках с учетом контактного взаимодействия проволок. Описаны основные виды напряжений, возникающих при эксплуатации стальных канатов. Приведены сведения, необходимые для проведения испытаний стальных канатов на долговечность при изгибе. Для определения долговечности стальных канатов при работе на блоках используются эмпирические зависимости, учитывающие множество факторов: действующую нагрузку, отношение диаметров каната и блока, предел прочности материала проволок, диаметр каната, длину пробега каната по блоку, тип сердечника, форму канавки блока, тип и методику смазки стального каната и др. Показано, что при изгибе каната на блоке возникают относительные смещения элементов стального каната, приводящие к возникновению явления фреттинг-износа. Для возбуждения этого процесса достаточны перемещения поверхностей с амплитудой 0,025 мкм. Величина относительных микросмещений проволок в стальном канате зависит в первую очередь от отношения диаметра каната к диаметру блока и экспоненциально увеличивается при его уменьшении. Таким образом, малый диаметр блока является неблагоприятным фактором, и его критический размер может быть установлен, исходя из анализа полученных решений.
Forced Vibrations of Planetary Gears with Elements of the Increased Flexibility
Authors: Pushkarev I A
Published: April 2019

В статье продолжается исследование динамики планетарных передач с элементами повышенной податливости. Основой для расчетной схемы и исходных уравнений является полученная ранее система девяти дифференциальных уравнений динамики планетарного механизма. В обобщенных силах учтены момент двигателя, момент, обусловленный кручением упругого вала солнечной шестерни; упругие силы в зацеплении колес и в осях сателлитов. Допускается, что скорость водила постоянна. Жесткость оси сателлита в тангенциальном направлении значительно превышает жесткость оси в радиальном направлении, поэтому перемещение в тангенциальном направлении отсутствует. Момент двигателя изменяется по гармоническому закону. В этом случае вынужденные колебания солнечной шестерни и сателлита можно рассматривать отдельно от вынужденных колебаний сателлита в радиальном направлении вследствие податливости оси сателлита. Построены амплитудно-частотные характеристики этих колебаний. Характеристики колебательных процессов выражены через массогабаритные, кинематические и прочностные параметры планетарной передачи с учетом податливости ее элементов. Исследовано влияние относительной высоты сечения податливой оси, передаточного отношения механизма и модуля зацепления на амплитуду вынужденных колебаний и положение резонансной области. Сделаны выводы о пределах изменения указанных параметров и их влияния на конструкцию планетарных передач.
Application of Generalized Pareto Distribution to Determine the Structural Graphite Parameters in Cast Iron
Authors: Belykh V V , Murav’yev V V , Stepanov V A
Published: April 2019

Установлен степенной закон распределения плотности вероятностей размеров включений графита на плоскости шлифа, показаны возможности параметризации структур чугуна с пластинчатым графитом типа ПГ10; вермикулярным графитом типа ШГ10-ВГ85; шаровидным графитом типа ШГ12. Предложено для классификации структур чугуна использовать показатель a степенного закона распределения плотности вероятностей размеров включений графита в чугуне, принимающий значение 0 < a < 1 и характеризующий оценку риска и аварийности структуры. Природа степенного закона распределения размеров включений графита возникает из-за фрактальности процессов графитизации и структуры графита. Показано, что степенной закон распределения плотности вероятностей размеров включений графита модифицируется в обобщенное распределение Парето, у которого конечны все моменты, что позволяет от функции распределения сечений графита случайной плоскостью перейти к распределению их размеров в объеме. Обобщенное распределение Парето размеров плоских включений графита позволяет вычислить характерный масштаб  и структурные параметры a и b графита в чугуне. С помощью структурно-чувствительного параметра b имеется возможность классификации чугунов. Для пластинчатой формы графита b = (0,39-0,56), для шаровидной формы b = (1,05-1,06), для вермикулярного графита b = 0,66. Функция распределения включений графита по диаметрам шаров открывает новые возможности количественного анализа связей «структура - свойства» для прогнозирования и моделирования высокопрочного чугуна с шаровидным графитом.
Temporal Characteristics of the Flow of Acoustic Emission Signals in the Development of Cracks in Glass under Shock Loading
Authors: Bekher S A , Popkov A A
Published: April 2019

В настоящее время отсутствуют технические решения для реализации АЭ-контроля объектов, находящихся под действием динамических нагрузок. Расширение области применения метода, например, для мониторинга объектов в процессе ударного нагружения требует фундаментальных исследований закономерностей акустической эмиссии (АЭ) при динамических воздействиях. Целью работы является определение временных параметров АЭ, возникающей в объекте в результате ударного нагружения, для обнаружения развивающихся трещин и разрушений хрупкого типа. В экспериментах плоские образцы из силикатного стекла нагружались ударами стальными бойками, свободно падающими с высоты 500 мм. Развитие трещины контролировалось с использованием быстродействующей тензометрической системы, АЭ-аппаратуры и видеокамеры. Ударное воздействие возбуждало в объекте упругие затухающие колебания, которые фиксировались и акустико-эмиссионной, и тензометрической системами. Характерная частота сигнала тензосистемы составляла 1,6 кГц, АЭ-системы - 110 кГц. Продолжительность времени затухания колебаний в сигнале тензосистемы не превышала 4 мс, непрерывный сигнал в АЭ-системе снижался ниже порогового уровня (5 мкВ) за время 30 мс. При нагружении образцов с трещиной наблюдалось смещение кромок по типу продольного сдвига на 0,1 мм с характерным временем перехода в первоначальное состояние 0,4 с. Тензодатчики, установленные перпендикулярно направлению развития трещины, регистрировали процесс релаксации деформаций трещины в течение 400 с. Зависимость количества зарегистрированных сигналов от времени удовлетворительно описывалась логарифмическим законом. После затухания непрерывных АЭ-сигналов, вызванных ударом, наблюдались два потока дискретных сигналов АЭ. Сигналы первого потока, связанные со смещением кромок трещины, регистрировались в интервале 0,03…0,35 с. Распределение временных интервалов между сигналами первого потока описывается экспоненциальной функцией. Сигналы второго потока регистрировались в интервале 0,35…400 с только при увеличении длины трещины. Временные интервалы между сигналами второго потока распределены по логарифмическому закону, что соответствует временной зависимости деформаций. Потоки сигналов являются нестационарными и связаны с разрушением кромок трещины после перераспределения напряжений, вызванных увеличением ее длины. Зарегистрированные сигналы АЭ могут быть использованы для обнаружения развивающихся трещины при ударном нагружении. Оптимальным способом их идентификации являются методы временной селекции в диапазоне 0,03…0,35 с для обнаружения развитой трещины и 0,35…400 с для обнаружения процессов роста трещины.
Detecting Deception: Effect of Auditory and Visual Stimuli on Pupil Dilation
Authors: Kim Kiho , Lee Yeonsil , Kim Hui-Teak , Lee Jang-Han
Published: April 2019

We investigated the effects of auditory and visual stimuli on pupil dilation induced by emotional arousal during deception. The 33 participants were free to select to be in either a guilty or a not-guilty group. The guilty group performed a theft crime mission, and the not-guilty group
performed a legal mission. To detect deception, we measured their pupil diameter with an eye tracker, and they completed the Control Question Test that is typically employed in polygraph tests, and which is based on a comparison of physiological responses to crime-relevant questions and comparison
questions. This test was presented via one of three stimuli: auditory, visual, or dual sensory (auditory and visual simultaneously). The findings revealed that the diameter of the pupils of the guilty group increased differently according to the question type when both auditory and visual
stimuli were presented simultaneously. Results suggest that pupil dilation could be the deception discriminant, and the use of more than one sensory stimulus may support lie detection in forensic investigations.
Expediente
Authors: RBEUR Comissão Editorial
Published: April 2019

Expediente
Dossiê: Paradigmas técnico-econômicos e reconfiguração territorial | Dossier: Technical-economic paradigms and territorial reconfiguration
Authors: Negreiros Rovena , Monteiro Neto Aristides
Published: April 2019

Editorial convidado
Reestruturação produtiva e consolidação de novos eixos de desenvolvimento territorial: O caso do Vetor de Desenvolvimento Perimetral da Macrometrópole Paulista | The productive restructuring and consolidation of the new vectors of territorial development: the case of the Perimetrical Development Vector of the São Paulo Macrometropolis
Authors: Proença Anderson Dias de Almeida , Santos Jr. Wilson Ribeiros dos
Published: April 2019

Analisa-se, neste artigo, a concepção do Vetor de Desenvolvimento Perimetral da Macrometrópole Paulista como um eixo linear de planejamento territorial privilegiado na reorganização espacial da estrutura produtiva paulista. Os dados apresentados demonstram que há, por parte dos órgãos estaduais de planejamento do Estado, um grande volume de investimentos em infraestruturas de transporte inter-regional, cujo objetivo é dotar esse eixo territorial entre Sorocaba, Campinas, São José dos Campos e o porto de São Sebastião de ótimas condições para atrair a localização dos setores mais modernos da indústria contemporânea e, por conseguinte, consolidá-lo como o principal corredor de produção e escoamento de mercadorias relacionadas aos novos padrões industriais/logísticos.
Instagram and the science museum: a missed opportunity for public engagement
Authors: Brown Jarreau Paige , Dahmen Nicole Smith , Jones Ember
Published: April 2019

Science museums are missing an opportunity to promote informal education, scientific literacy, public engagement and public visibility of scientists outside of museum walls via Instagram. With an analysis of 1,073 Instagram posts, we show that museums are using Instagram as a promotional broadcasting tool, with a focus on end results of collections and curation work over communication of museum-led discovery and science as a process. We suggest that science museums create more Instagram posts that offer educational information and visibility of exhibit creation and museum researchers' work behind the scenes.
EVALUATION OF MORPHOLOGICAL AND BIOCHEMICAL RESISTANCE PARAMETERS TO CHLORIDE SALINATION IN DIFFERENT WHEAT GENOTYPES
Authors: Kononenko Neonila V , Dilovarova Tat’yana A , Kanavsky Roman V , Lebedev Svyatoslav V , Baranova Ekaterina N , Fedoreeva Larisa I
Published: April 2019

Determining salt tolerance potential in wheat is one of the most important problems in breeding practice for areas with primary and secondary salinity. Presence of large areas of saline soils results in inhibition of growth, development and stability in obtaining high yields of agricultural plants. Therefore, there is a need for a comprehensive studying and improving of diagnostic methods during early growth stages. Different genotypes of wheat Triticum aestivum Host. and Triticum durum Desf. were used to identify salt tolerance markers. Both morphometric and some biochemical indicators of wheat varieties were used as salt tolerance markers. At this stage, it was shown that a comprehensive description of wheat varieties is needed to assess resistance of wheat varieties to chloride salinity.
ECOLOGICAL AND PHYTOCENOTIC CHARACTERISTICS OF ROSA ACICULARIS L. IN EKATERINBURG FOREST PARK ZONE
Authors: Tishkina Elena A , Chermnykh Artem I
Published: April 2019

Analysis of forest areas in forest parks of Ekaterinburg was carried out based on GIS database of AWP Lesfond program. A database of distribution of undergrowth species in forest parks was formed and then analyzed with Microsoft Excel. Regularities in the distribution of local and introductory undergrowth species in pine forests of Ekaterinburg were determined. The area of pine forests having undergrowth of twelve aboriginal, two invasive species and ten species in artificial plantings in six forest parks of Ekaterinburg - Kalinovsky, Moskovsky, Yuzhny, Nizhneisetsky, Shuvakishsky and im. Lesovodov Rossii - was determined. Analysis of the data showed that the area covered with prickly wild rose ( Rosa acicularis ) constituted 811.4 hectares of all the undergrowth territory (9848.45 hectares), but its distribution in forest park was extremely heterogeneous. Rosa acicularis occurs in the Nizhneisetskiy forest park more often than in other forest parks (273.1 ha). This species is common in nine types of forest, its ecological and phytocenotic distribution optimum is berry pine forest with 0.6-0.9 stand of trees. Presence of prickly wild rose in undergrowth and condition of its cenopopulations indicate a typical composition of plants in the forest park zone of Ekaterinburg. In the forest parks studied, Rosa acicularis is one of the co-edificators in indigenous forest types, along with Sorbus aucuparia , Rubus idaeus , Prunus padus , Salix caprea , Chamaecytisus ruthenicus , Rosa acicularis . The data given on the calculation of forest areas with prickly wild rose are the basis for inventory of valuable medicinal raw materials and ready-made decorative forms for the introduction of urban landscaping.
THE RESULTS OF THE EMBRYO TRANSFER TO HEIFERS FROM THE AYRSHIRE BREED
Authors: Nimbona Constantin , Kulikova Nadezhda I , Butore Joseph , Ntunzwenimana Melance
Published: April 2019

Dairy cattle’s breeding is an important industry, since it is providing milk and meat to population. Modern cows are significantly different from their ancestors in biology, behavior and in productivity. The scientific approach to feeding, condition of content and formation of focused heredity contributed to increasing the cows’ productivity. During the mammary gland formation and sexual cycles manifestation, puberty occurs, which makes it possible to obtain offspring and secretion of milk for feeding calves. The modern cows are capable of producing milk for their calves and for feeding people. The appearance of record cows, giving about 100 kg per day, and during lactation more than 32 tons of milk serves as an example for achieving such indicators of production. There are negative effects in reproduction biology, which takes place in modern cattle breeding. In order to breed highly productive cows, it is important to increase their livestock by intensive selection. Modernity is such that fertility is reduced due to cows’ reproductive functions inhibition. Modern practice shows that it is possible to introduce methods of obtaining several calves from one cow. It is generally accepted for this purpose use new reproduction methods, for example transplantation of embryos with high genetic potential. This technique is widely used in biotechnology of cows breeding. We have tested the method of preparing and conducting embryo transfer to heifers from 13 to 16 months old in the Kuban Agro-Association. The article presents indicators of heifer. It was revealed that not all animals reacted positively to superstimulation. Embryo transplantation showed that 35.1% of embryos survived after embryo transfer. Economic calculations have shown that for the rapid formation of a highly productive herd on the farm, it is advisable to use Ayrshire breed heifers capable of raising embryos and giving birth to healthy calves as recipients.
Analisis Keterlaksanaan Model Discovery Learning Berbantuan Multimedia Asam Basa
Authors: Haryanto Haryanto , Alfiah Rini , Sanova Aulia
Published: April 2019

This research is based on the limited of teaching media that helps students in the process of understanding the material and the low of students’ interest on the chemistry material that is taught and also the impact on students' learning outcomes. The use of alkali-acid learning multimedia in Discovery Learning model can be one of alternative that can be applied to attract interest and improve student learning outcomes. This study aims to determine how far the implementation of the Discovery Learning model with the help of alkali-acid learning multimedia and its effect on students' learning outcomes in alkali-acid learning in class XI IPA SMAN 2 Jambi. The type of this research is descriptive correlation. The method in this research is mix method by using two data that is qualitative and quantitative data with sequential exploratory type (order sequence model). The sampling technique was done by Simple Random Sampling technique. There is one class that is used as sample that is class XI IPA 1. the research instrument in the form of observation sheet implementation of Discovery Learning model both from teacher and student and student essay test question. Qualitative data analysis techniques using Miles and Huberman and quantitative analysis techniques using product moment correlation test and t-test. The implementation of discovery learning model by teachers has increased every meeting, and the implementation of the discovery learning model by the students of 70.71% with good categorization. The relationship between implementation of discovery learning model and student learning outcomes is categorized by rxy 0,596. The significance test is done by t-test and obtained thitung > ttabel (4,749> 1,683) with dk 41 and  a= 0,05 so Ho is rejected and Ha  is accepted. Based on the results of this research it can be concluded that the implementation of Discovery Learning model with the help of alkali-acid learning multimedia goes well and has an effect on student's learning outcomes in class XI IPA 1 SMAN 2 Jambi.

 

Keywords: Discovery Learning, alkali-acid learning multimedia, and students' learning outcomes
Analisis Keterlaksanaan Model Pembelajaran Creative Problem Solving (CPS) dan Pengaruhnya terhadap Keterampilan Proses Sains Siswa pada Materi Asam Basa Kelas XI IPA SMAN 10 Kota Jambi
Authors: Bakar Abu , Nurjanah Siti , Fuldiaratman Fuldiaratman
Published: April 2019

Model creative problem solving (CPS) is one model of learning centered on problem-solving skills, followed by strengthening creativity. When faced with a situation of question, students can perform problem-solving skills to select and develop a response. While the science process skills are skills that foster scientific attitude of students. By using methods practicum, students' science process skills can be seen. This study aims to determine the extent of adherence to the creativesolving model-basedproblemand the effect on students' science process skills in the acid-base material in class XI IPA 2 SMAN 10 Jambi. The approach used in this study is a mixed approach (mix method) with the type ofmodels exploratory sequentile (model order of discovery). The sampling technique was conducted by purposivesampling.There is one class that is used as a sample of grade XI 2. The research instrument used is the observation sheet enforceability of the model by teachers and students as well as students' science process skills and post-test students. Data qualitative data analysis techniques using Miles and Huberman and quantitative data usingcorrelation product momenttest. Imlementation model of creative problem solving (CPS) by teachers and students has been implemented according to the principles model of creative problem solving (CPS) each meeting. The percentage of adherence to a model by the teacher obtained a score of percentage 70.00% (Good), adherence to a model by the percentage of students obtained a score of 71.28% (Good), and the enforceability of the science process skills percentage of students obtained a score of 75.34% (Good). Correlation of adherence to the model of creative problem solving in science process skills by being categorized with the average rxy0,4150. Based on conclusion is that the learning model creative problem solving (CPS) has been performing well and the effect on the improvement of science process skills of students in the material acid-base in class XI IPA 2 SMAN 10 Jambi.

Keywords: Learning Model Creative Problem Solving, Science Process Skills, Acids and Bases
Identifikasi Miskonsepsi Siswa Pada Materi Reaksi Redoks Menggunakan Certainty Of Respond Indeks
Authors: Jannah Riza Raudatul , Utami Lisa
Published: April 2019

This Research aimed at identifying student misconception on Redox Reaction lesson at the tenth grade of State Vocational High School 5 Pekanbaru. It was Descriptive. Purposive sampling technique was used, and the sample were the tenth grade students of class TAV 2. Multiple choice with reasoning diagnostic test with CRI (Certainty of Response Index) column was the instrument used. Based on the research findings, it showed that there was a student misconception on Redox Reaction lesson. Sub concept was the highest misconception. The concept development of Redox Reaction lesson was 22.23%, sub concept of oxidation number was 19.05%, and sub concept of reducing and oxidation agents was 12.7%. Misconception happened because of the learning method that was teacher center, the lack of textbook reference, and the low of student learning interest. Based on the data analysis, it revealed that CRI was effective to be used to identify student misconception.

 

Keywords: Misconception, Multiple Choice Test Reasoned Open, CRI (Certainty of Response Index), Redox Reaction Concept
PENINGKATAN KEMAMPUAN BERPIKIR KREATIF SISWA DENGAN MENGGUNAKAN MODEL PROJECT BASED LEARNING BERBASIS STEAM (SCIENCE, TECHNOLOGY, ENGINEERING, ARTS DAN MATHEMATIC) PADA MATERI ASAM DAN BASA DI SMAN 11 KOTA JAMBI
Authors: Annisa Rifka , Effendi M Haris , Damris Damris
Published: April 2019

Model project based learning berbasis STEAM adalah model yang menuntut siswa untuk menghasilkan sesuah produk, dan produk yang dihasilkan memiliki kreteria science, technology, engineering, arts dan mathematic. Tujuan penenilian adalah untuk melihat perbedaan kemampuan berpikir kreatifitas siswa menggunakan model project based learning berbasis STEAM pada materi asam dan basa. Desain penelitian ini adalah pre-experimental desain dengan jenis penelitian one-group pretest-postest desain menggunakan sampel penelitian rondom sampling. Adapun sampel yang dipilih hanya satu kelas yaitu kelas XI MIA 2. Instrument penelitian berupa rencana pelaksanaan pembelajaran, soal pretest dan  posttest. Analisis data menggunakan uji paired sampel t-test, nilai rata-rata pretest 1,58 dan posttest 3,17. Hasil korelasi nilai pretest-postest 0,263 > 0,05 artinya tidak terdapat hubungan antar nilai pretest-postest. Nilai signifikansi 2- tailed 0,000 < 0,05, maka dapat disimpulkan terdapat perbedaaan yang nyata kemampuan berpikir kreatif siswa pada data pretest dan posttes. Berdasarkan hasil penelitian dapat disimpulkan terdapat perbedaan yang nyata kemampuan berpikir kreatif siswa dangan penggunaan model poreject basd learning pada materi asam dan basa di SMAN 11 Kota Jambi.

Kata kunci : Model Project Based Learning, STEAM, Berpiki Kreatif

ABSTRAK

The STEAM-based project based learning model is a model that requires students to produce a product, and the products produced have criteria for science, technology, engineering, arts and mathematic. The aim of the study was to see differences in students' creative thinking abilities using STEAM-based project based learning models on acidic and basic material. The design of this study was pre-experimental design with the type of one-group pretest-posttest research using a sample sampling method. The sample chosen was only one class, namely class XI MIA 2. The research instrument was in the form of a learning implementation plan, about the pretest and posttest. Data analysis using paired sample t-test, pretest average value 1.58 and posttest 3.17. Corlation results of the pretest-posttest value 0.263> 0.05 means that there is no relationship between the values ​​of the pretest-posttest. 2- tailed significance value 0,000 <0,05, it can be concluded that there are significant differences in students' creative thinking skills on data pretest and posttes. Based on the results of the study, it can be concluded that there are significant differences in the students' creative thinking ability with the use of the poreject basd learning model in acidic and basic material in SMAN 11 Kota Jambi.

Keywords : Model Project Based Learning, STEAM, Creative Thinking
Design e Avaliação de um Aplicativo Móvel de Notificações para Interações em Fóruns em LMS
Authors: Marcelo Pontes Ferraz João , José de Melo Filho Ivanildo , Da Rocha Seixas Luma , Sandro Gomes Alex
Published: April 2019

This article aims to present the development, prototyping and testingof a mobile application to notify about activities carried out in forums in theLMS Moodle environment. The context in which this research was developedat the Federal Institute of Pernambuco (IFPE) in distance technical trainingcourses. The procedure for its development consisted of four phases namely:immersion, prototyping, experiment and analysis. The results obtained fromthe perception of the participants allowed to evolve and improve the changesin the interface of the application during the immersions, generating anexperience of suitable use for the learners of this modality of teaching.
Robótica livre como alternativa didática para a aprendizagem de Música
Authors: F. Antunes Sabrina , C. Teixeira Adriano , Pireddu Mario
Published: April 2019

Com a publicação da Lei 11.769/2008, que obriga o ensino de Música na educação básica, é urgente criar soluções para minimizar a carência de instrumentos musicais nas escolas e o número insuficiente de professores com formação em Música. Este artigo objetiva apresentar uma pesquisa acerca de um dispositivo eletrônico baseado em robótica livre para apoio ao ensino de Música a partir do método Orff. O trabalho de campo caracterizou-se como exploratório de cunho qualitativo e realizou-se a partir de quatro oficinas com quatro sujeitos com idade entre 10 e 12 anos. Com o estudo, verificou-se que o dispositivo criado teve potente atuação no processo de avaliação da aprendizagem por parte dos alunos e, em última análise, que a robótica caracteriza-se como uma tecnologia potente para a criação de dispositivos para apoio à aprendizagem de música.
UM ESTUDO SOBRE O RACIOCÍNIO LÓGICO MATEMÁTICO: O CASO DAS OLIMPÍADAS DE PROGRAMAÇÃO DE COMPUTADORES
Authors: Espíndola Lessa Valéria , Mileidi Pazinato Ariane , Canabarro Teixeira Adriano
Published: April 2019

Este artigo apresenta os resultados de um estudo sobre o uso do raciocínio lógico matemático de estudantes do ensino fundamental participantes das Olimpíadas de Programação de Computadores. O referencial teórico está embasado na informática educativa e na psicologia cognitiva. É uma pesquisa de cunho qualitativo a partir da análise das produções destes estudantes e das percepções deles sobre a atividade de programar. Os instrumentos de coleta de dados constituíram-se em gravação dos arquivos gerados após as resoluções e as entrevistas em grupo focal. A análise dos dados deu-se através da identificação, nas falas e nas produções, da relação de ordem e planejamento, indicativa de raciocínio lógico. Como resultados, temos que a relação de ordem e planejamento perpassa todo o processo de programação e que, portanto, a programação de computadores demanda o desenvolvimento do raciocínio lógico.
SUAV – SISTEMA UBÍQUO DE APRENDIZAGEM VERTICAL
Authors: Furtado Lorenci Felipe , Vieira Mathias Carmen , Martinuzzi Buriol Tiago
Published: April 2019

Muitos estudantes iniciam cursos do ensino superior com sérias dificuldades em tópicos de matemática, limitando seu desempenho em disciplinas como Cálculo e Álgebra Linear. Dessa forma, professores despendem um grande esforço para identificar estes problemas individuais e específicos, revisando os pré-requisitos necessários para cada conteúdo. Os dispositivos móveis são excelentes ferramentas quando usadas como plataformas de entrega de um ensino mais personalizado, porém, grandes potenciais dessas tecnologias ainda não foram completamente explorados. Este relato de pesquisa apresenta o desenvolvimento de uma aplicação para smartphones, destinada ao estudo de matemática apenas com a resolução de exercícios. A ideia central é que a partir de questões propostas, o aplicativo identifique as dificuldades do aluno, fornecendo dicas e materiais instrutivos relativos à essas deficiências; além disso, com uma análise nas respostas fornecidas pelo usuário juntamente com a frequência do uso de dicas, o sistema é capaz de reconhecer quais temas já estão dominados e também aqueles que ainda possuem lacunas, permitindo a criação de um mecanismo de identificação de pontos falhos e entrega de materiais específicos de forma clara, objetiva e orientada a cada usuário.
ANÁLISE DE MATERIAL DIDÁTICO DE LÍNGUA ESTRANGEIRA VOLTADO A CONTEXTOS TECNOLÓGICOS E PRODUZIDO POR PROFESSORES EM FORMAÇÃO
Authors: Da Silva Campelo Costa Barcello Patrícia , Backes Nunes Mariana
Published: April 2019

Este trabalho analisa materiais didáticos voltados a contextos de tecnologiadigital produzidos por professores em pré-serviço. Tais materiais didáticos foramproduzidos em uma disciplina semipresencial voltada a reflexões sobre o ensino de língua estrangeira mediado por tecnologia. Os alunos foram instigados, ao final do curso, a produzirem as suas próprias unidades didáticas. Dessa maneira, seguimos duas metodologias distintas de análise dessas unidades. Primeiramente, foi realizada uma análise das unidades considerando suas características tecnológicas, seguindo parâmetros de objetos de aprendizagem (ARAÚJO, 2013). Após esse primeiro estudo, foi realizada uma segunda análise considerando as diferentes estratégias de aprendizagem de linguagem (OXFORD, 2003) que as tarefas ali presentes poderiam suscitar em uma aula de língua estrangeira. Espera-se que com essa pesquisa os professores em formação possam tornar-se produtores autônomos de produtos pedagógicos digitais.
My TechLife: Desenvolvimento e Validação de um Jogo para o Ensino Técnico em Informática
Authors: Pinheiro da Silva Diego , Rosecler Bez Marta , José Rigo Sandro
Published: April 2019

Este artigo apresenta a construção e a validação de um jogo RPG para o aprendizado de técnicas de informática, nomeado My TechLife. O Jogo simula a resolução de problemas reais vivenciados por técnicos em informática, consistindo em uma ferramenta educacional e motivadora para o aprendizado. Este foi desenvolvido na linguagem JavaScript, utilizando como ferramenta de apoio o Rpg Maker MV. O jogo está disponível para smartphones na plataforma Android. Ele foi validado por 52 alunos de cursos técnico de informática de 4 instituições de ensino, os quais jogaram e depois preencheram um questionário avaliativo. Na análise do questionário observa- se que o jogo foi muito bem avaliado como ferramenta a ser utilizada no ensino em informática.
Poly e GeoGebra 3D: um experimento de ensino na educação básica
Authors: Trainotti Andressa , Sychocki da Silva Rodrigo
Published: April 2019

Este artigo tem como objetivo apresentar e refletir sobre um experimento de ensino envolvendo Geometria Espacial ocorrido na educação básica fazendo-se uso dos softwares Poly e GeoGebra 3D. A pesquisa de caráter qualitativo ocorreu com uma turma de 2º ano de Ensino Médio de uma instituição da rede estadual de educação de Santa Catarina. Ao fim da pesquisa pôde-se concluir que as tecnologias digitais usadas no experimento contribuíram para o aprendizado dos tópicos de Geometria Espacial estudados, desenvolveram a curiosidade e motivação dos estudantes, assim como tornaram a sala de aula um ambiente de exploração, criação de conjecturas e validação de hipóteses pelos estudantes, os quais são elementos de uma profícua aprendizagem.
Construindo saberes nas redes sociais
Authors: Bairros Soares Aline , Palma Botega Sandra , Maria Araújo dos Santos Leila , Machado Ellensohn Ricardo , Smaniotto Barin Claudia
Published: April 2019

Imersos num mundo tecnológico, os jovens vêm desenvolvendo novas formas de aprender por meio do compartilhamento de saberes e questionamentos com seus pares nos ambientes virtuais oriundos das ferramentas da web 2.0. Nesse sentido o presente trabalho visa avaliar o uso das redes sociais como um espaço de compartilhamento e aprendizagem no ensino superior. O estudo consiste num relato de experiência do uso e produção de recursos educacionais digitais compartilhados no Facebook ® com estudantes de Agronomia ingressantes à universidade nos anos de 2015 a 2017. Os resultados apontam que, apesar das redes sociais requererem do professor uma nova postura no que tange ao planejamento, compartilhamento e monitoramento, o Facebook aproxima os agentes do processo de aprendizagem à medida que provê maior liberdade de expressão, o que resulta em maior participação dos estudantes e consequentemente na construção do conhecimento na coletividade.
ROBÓTICA EDUCACIONAL NA EDUCAÇÃO INFANTIL: CRIAÇÃO E AVALIAÇÃO DE UMA PLATAFORMA PARA O DESENVOLVIMENTO DO PENSAMENTO COMPUTACIONAL
Authors: Ballardin Duso Guilherme , Lucas Pereira de Lima Luan , Dall Agnese da Costa Roberta , Geltrudes Webber Carine
Published: April 2019

A robótica educacional vem sendo muito utilizada em escolas ao redor do mundo para o desenvolvimento de habilidades de STEM desde o começo do aprendizado. Embora existam produtos para crianças e adolescentes, há uma carência de recursos para uso na educação infantil. A pesquisa desenvolvida sustenta a importância do ensino de conceitos de programação e robótica logo nas séries iniciais. Propõe-se uma plataforma composta por hardware (robô) e software (aplicativo móvel) destinada ao ensino de programação visando o desenvolvimento de habilidades do pensamento computacional. Tal plataforma está operacional e os testes preliminares evidenciam seu potencial.
Detecção de mudanças em dados de imagens multitemporais de sensoriamento remoto empregando Support Vector Machines com o uso de kernel polinomial e kernel RBF (kernel função de base radial)
Authors: FERREIRA Rute Henrique da Silva , ANGELO Neide Pizzolato
Published: April 2019

Este artigo investiga uma abordagem para o problema da detecção de mudanças em imagens multitemporais de sensoriamento remoto empregando Support Vector Machines (SVM) com o uso dokernel polinomial e do kernel RBF (kernel função de base radial). Para os experimentos, foram consideradas duas imagens Landsat 5-TM cobrindo a mesma área, localizada no Estado de Roraima, Brasil (61°37’W–61°49’W de longitude e 3°40’N–3°52’N de latitude). A proposta metodológica está baseada na diferença de imagens-fração. Em imagens de cenas naturais, a diferença nas frações de solo e vegetação tende a apresentar uma distribuição simétrica em torno da origem, fato utilizado para modelarduasdistribuições normais multivariadas:mudança e não-mudança. O algoritmo Expectation-Maximization (EM) foiimplementado para estimar os parâmetrosassociados a essas duas distribuições. Amostras aleatórias foram extraídas a partir das distribuições e usadas para treinar o classificador SVM. Para a avaliação da acuráciada metodologia, foram utilizados dois procedimentos: a análise qualitativa, realizada por meio da produção do mapa de mudança, e a análise quantitativa, a partir da construção da matriz de confusão em uma imagem sintética.Foi possível observar que o kernel RBF apresentou resultados muito semelhantes para todos os conjuntos de amostras de teste, independentemente do tamanho do conjunto de amostras de treinamento, o que não ocorre com o kernel polinomial.Os experimentos desenvolvidos neste trabalho mostram a adequação da metodologia proposta, produzindo resultados aceitáveis na detecção de alterações na cobertura do solo, uma vez que o SVM é um método robusto, lida bem com o problema da dimensionalidade e com amostras ruidosas e necessita de um número pequeno de amostras de treinamento para o processo de classificação.
Electores presentes, ciudadanos ausentes: La democracia mexicana en su laberinto
Authors: Mora Heredia Juan , Jiménez Badillo Margarita
Published: April 2019

O México registra um panorama com eleitores presentes, mas com cidadãos ausentes, dadas as condições limitadas de bem-estar e paz social que garantem uma plena participação política. Desta forma, este artigo revisa e descreve três condições que hoje em dia são essenciais para fortalecer uma vigorosa atividade cidadã: a pobreza, a insegurança pública e o acesso à sociedade da informação. Por causa de sua fraqueza, dificultam o impulso a uma comunidade com aspirações democráticas e uma hierarquia cidadã, acima da figura de um eleitor indolente. Recuperando a própria essência da política, longe das rotinas patrimoniais e clientelistas predominantes.
Os PCs e a questão democrática: discussões acerca da democracia nos partidos comunistas no Brasil
Authors: Figueiredo César Alessandro Sagrillo
Published: April 2019

A centralidade da questão democrática norteou as discussões do PCB a partir da Declaração de Março de 1958, servindo como tese para o V Congresso do PCB em 1960. Como reflexo desta nova diretriz partidária fomentou a secção dos comunistas no Brasil entre o PCB e o PCdoB. Sendo que, em face da ditadura militar houve um longo período de transição para a democracia no Brasil, ocasionando que ambos os partidos buscassem como tática política o fim do regime militar através de uma transição conservadora e pactuada. Portanto, este artigo possui como objetivo discutir como se processou a influência da questão democrática na política dos partidos comunistas do Brasil. Quanto aos procedimentos metodológicos, tratar-se-á de um trabalho qualitativo, pois visa a reconstituição histórica procurando examinar comparativamente os PCs, através de bibliografias referentes aos elementos mais significativos do contexto internacional e nacional.
Congruencia temática entre ciudadanos y representantes en América Latina: una perspectiva multidimensional
Authors: Rodriguez Zepeda Juan Antonio
Published: April 2019

Este trabalho propõe uma contribuição metodológica ao estudo emprírico da representação política. Nele, explora-se o nível de congruência temática entr os cidadãos e os deputados de 15 países latinoamericanos. O objetivo é conhecer em que medida as opiniões desses grupos convergem com a intervenção do Estado em seis aspectos do âmbito público. Para isto, utilizaram-se os métodos de estatística multivariada: escalas multidimensionais e análise Procrustes. Pelo primeiro, foi possível saber como estão estruturados estes temas para os representantes e representados; a partir do segundo, mediu-se o grau de semelhança entre as estruturas ditas. A contribuição do estudo é considerar a estrutura multidimensional da congruência temática e usar ferramentas estatísticas adequadas para analisá-la.