bluuebunny/crossref_metadata_2025 huggingface dataset:
ANALISIS KESALAHAN SISWA DALAM MENGERJAKAN SOAL URAIAN MATEMATIKA PADA POKOK BAHASAN PERSAMAAN GARIS LURUS
Authors: Payadnya I Putu Ade Andre
Published: May 2022

Penelitian ini bertujuan untuk mengetahui adanya jenis dan penyebab kesalahan yang dilakukan siswa dalam mengerjakan soal matematika. Metode penelitian ini metode kualitatif. Jenis penelitian ini adalah deskriptif. Pengumpulan data dilakukan dengan tes dan wawancara. Subjek penelitian ini adalah siswa kelas VIII E SMP Negeri 1 Blahbatuh dengan jumlah 42 orang. Sampel penelitian dipilih dengan menggunakan metode Cluster Random Sampling sehingga jumlah sampel penelitian ini sebanyak 6 siswa. Materi yang digunakan adalah materi persamaan garis lurus. Teknik analisis datanya menggunakan reduksi data, penyajian data, penarikan kesimpulan, dan keabsahan data (triangulasi). Berdasarkan hasil penelitian dapat disimpulkan bahwa kesalahan – kesalahan yang dilakukan ketika siswa mengerjakan soal uraian adalah kesalahan dalam tahap membaca soal (2,61%), kesalahan memahami masalah (24,18%), kesalahan transformasi (11,11%), kesalahan keterampilan proses (31,37%) dan penulisan jawaban akhir (30,71%). Penyebab kesalahan yang dilakukan siswa adalah tidak memahami soal yang diberikan, kurang teliti, tidak memeriksa kembali hasil pekerjaannya, kurang bisa memanfaatkan waktu dengan baik.
ANALISIS KESALAHAN DALAM MENGERJAKAN SOAL MATEMATIKA PADA POKOK BAHASAN POLA BILANGAN SMPN 1 BLAHBATUH TAHUN AJARAN 2020/2021
Authors: Noviantari Putu Suarniti
Published: May 2022

ABSTRAKPenelitian ini adalah penelitian deskriptif dengan metode kualitatif. Penelitian ini bertujuan untuk mengetahui jenis-jenis kesalahan siswa dalam mengerjakan soal pemecahan masalah dengan Prosedur Newman dan penyebab kesalahannya. Subjek penelitian ini adalah siswa kelas VIII D SMPN 1 Blahbatuh yang kemudian dikelompokkan menjadi 3 kelompok yaitu kelompok tinggi, sedang, dan rendah yang diambil 2 siswa dari masing-masing kelompok sehingga jumlah subjek penelitian menjadi 6 siswa. Data dalam penelitian ini adalah soal tes pemecahan masalah materi pola bilangan dan wawancara. Teknik analisis datanya menggunakan reduksi data, penyajian data, penarikan kesimpulan, dan keabsahan data (triangulasi).Hasil penelitian menunjukkan bahwa dari ketiga kelompok, jenis kesalahan yang paling sering dilakukan adalah 1) membaca masalah, 2) memahami masalah, 3) transformasi, dan 4) penulisan jawaban. Kesalahan 1 sampai 4 sering dilakukan oleh kelompok rendah, kesalahan 2 sampai 4 sering dilakukan oleh kelompok sedang, dan kesalahan 3 dan 4 sering dilakukan oleh kelompok tinggi. Penyebab kesalahan yang sering dilakukan ketiga kelompok adalah : tidak bisa menyusun makna kata yang dipikirkan kedalam bentuk struktur gramatikal, tidak memahami makna kata yang diminta, kurang teliti, terlalu tergesa-gesa dalam mengerjakan soal, dan tidak bisa mengatur waktu dengan baik.Kata kunci : Pembelajaran Matematika;Kesalahan Siswa;Prosedur Newman ABSTRACTThis research is a descriptive study with qualitative methods. This study aims to determine the types of student errors in solving problems with the Newman procedure and the causes of the errors. The subjects of this study were students of class VIII D of SMPN 1 Blahbatuh who were then grouped into 3 groups, namely the high, medium, and low groups which were taken by 2 students from each group so that the number of research subjects became 6 students. The data in this study were the problem solving questions of the number pattern material and interviews. The data analysis technique used data reduction, data presentation, drawing conclusions, and data validity (triangulation). The results showed that of the three groups, the most frequent types of errors were 1) reading the problem, 2) understanding the problem, 3) transformation, and 4) writing answers. Mistakes 1 to 4 are often done by the low group, errors 2 to 4 are often done by the moderate group, and errors 3 and 4 are often done by the high group. The causes of mistakes that are often made by the three groups are: not being able to compile the meaning of the thought thought into a grammatical structure, not understanding the meaning of the word requested, not being careful, being too hasty in working on the problem, and not being able to manage the time well. Keywords : Mathematics learning;Student error;Newman procedure
ANALISIS KESALAHAN SISWA DALAM MENYELESAIKAN SOAL CERITA MATEMATIKA BERDASARKAN PROSEDUR NEWMAN PADA SISWA KELAS VII SMP NEGERI 1 BLAHBATUH
Authors: Noviyanti Putu Ledyari
Published: May 2022

Penelitian ini bertujuan untuk mengetahui kesalahan dan penyebab kesalahan siswa dalam menyelesaikan soal cerita matematika. Prosedur kesalahan yang digunakan dalam penelitian ini adalah Prosedur Newman. Jenis penelitian ini adalah deskriptif kualitatif dengan metode pengumpulan data yaitu metode tes tertulis dan wawancara. Subjek dalam penelitian yaitu siswa kelas VIIG SMP Negeri 1 Blahbatuh yang berjumlah 32 orang. Hasil penelitian menunjukkan bahwa kesalahan yang dilakukan siswa dalam menyelesaikan soal cerita matematika dengan materi aljabar berdasarkan prosedur Newman adalah : (a) Kesalahan membaca soal, tidak ada subjek yang salah membaca soal, (b) Kesalahan memahami masalah dilakukan oleh semua subjek penelitian, (c) Kesalahan transformasi dilakukan oleh subjek penelitian 1; 3; 4; 5; dan 6, (d) Kesalahan keterampilan proses dilakukan oleh subjek peneitian 3; 4; 5; dan 6, (e) Kesalahan penulisan jawaban dilakukan oleh semua subjek penelitian. Adapun penyebab kesalahan siswa yaitu tidak memahami yang diminta oleh soal, tidak teliti, kurang dapat menangkap informasi yang terkandung dalam soal, lupa rumus, kurangnya latihan mengerjakan soal cerita, dan kurang memahami materi.
IDENTIFYING STUDENTS UNDERSTANDING THROUGH PROBLEM POSING
Authors: Nasution Nur Baiti
Published: May 2022

It is obvious that pre service mathematics teacher should have comprehensive understanding in any mathematics for school concept, including linear and quadratic function. The aim of this article is to describe a classroom activity using problem posing model that can be used as a way to identify students  understading about linear and quadratic function. Moreover, we also discussed about misconceptions found in the process. This research involved as many as 27 students. The data were collected using observation and documentation of students answer sheets. The data were analyzed qualitatively. The results show that there are students who have misconceptions about the definition of the function and about some terms that often appear in the learning.
ANALISIS KEMAMPUAN PEMECAHAN MASALAH MAHASISWA CALON GURU MATEMATIKA PADA MATERI ARITMETIKA SOSIAL
Authors: Luthfiyah Rifdah
Published: May 2022

Penelitian ini menggunakan penelitian deskriptif kualitatif. Subjek yang dituju dalam penelitian ini adalah mahasiswa Pendidikan Matematika semester empat Universitas Sriwijaya sebanyak 35 mahasiswa. Tes soal tipe uraian soal problem solving digunakan sebagai teknik pengumpulan data yang dibutuhkan untuk penelitian. Berdasarkan hasil dan pembahasan mengenai kemampuan problem solving  pada materi aritmetika sosial, sehingga disimpulkan bahwa mahasiswa calon guru matematika Universitas Sriwijaya didapatkan yaitu 1) mean kemampuan pemecahan masalah mahasiswa dikategorikan sangat rendah; 2) semua mean kemampuan pemecahan masalah mahasiswa mengenai  indikator 1-4  dikategorikan sangat rendah
Pengaruh Pembelajaran Daring terhadap Minat Belajar Matematika Siswa SMP pada Masa COVID-19
Authors: Arlavinda Virla , Pujiastuti Heni
Published: May 2022

Penelitian ini menggunakan penelitian kualitatif. Penelitian kualitatif ini bersifat deskriptif yang menggunakan analisis data kualitatif sehingga menjadi paparan data yang mudah dimengerti. Pembelajaran pada sekolah menengah pertama dalam penelitian ini menggunakan pembelajaran secara daring atau biasa disebut dengan pembelajaran jarak jauh dengan bimbingan orang tua dan guru di sekolah. Siswa melakukan pembelajaran daring melalui Google Classroom, Google Meet, Zoom dan berinteraksi dengan guru melalui aplikasi Whatsapp Group. Penelitian ini bertujuan untuk mengetahui pengaruh pembelajaran daring terhadap minat belajar siswa pada siswa SMP pada masa COVID-19. Responden yang diambil adalah siswa SMP. Hasil penelitian ini menunjukkan bahwa pembelajaran daring pada masa pandemi COVID-19 sangat berpengaruh terhadap minat belajar siswa, siswa merasa bosan karena tidak bertemu dengan teman dan gurunya secara langsung.
Efektivitas Flipped Classroom Learning Terhadap Peningkatan Hasil Belajar Matematika Siswa SMP
Authors: Pratiwi Kadek Ayu Mutiara
Published: May 2022

Penelitian ini adalah penelitian eksperimen dengan tujuan untuk mengetahui efektivitas pembelajaran flipped classroom terhadap hasil belajar matematika siswa kelas VIII SMP. Jenis penelitian yang digunakan adalah eksperimen semu dengan desain post test only group design. Populasi dari penelitian ini adalah seluruh siswa kelas VIII SMP N 3 Semarapura sebanyak 275 orang. Sedangkan sampel yang digunakan dipilih secara acak (cluster random sampling) sehingga menghasilkan dua kelompok yaitu kelas VIII A sebagai kelas eksperimen dan kelas VIII C sebagai kelas kontrol. Teknik pengumpulan data adalah dengan memberikan intrumen post-test kepada dua kelompok kelas pada akhir penelitian, menghasilkan data hasil belajar matematika siswa. Data dianalisis menggunakan uji-t independent sample pihak kanan dengan taraf signifikansi 5% menunjukkan bahwa H0 ditolak. Hal ini berarti hasil belajar matematika siswa dengan pembelajaran flipped classroom lebih baik dibandingkan hasil belajar matematika siswa dengan pembelajaran konvensional. Temuan ini menunjukkan keefektifan dari penggunaan flipped classroom learning terhadap hasil belajar matematika pada masa pandemi Covid-19.
PENGEMBANGAN LKS BERORIENTASI HOTS BERBANTUAN EXELEARNING DAN GEOGEBRA UNTUK MENINGKATKAN PEMAHAMAN KONSEP SISWA KELAS VII
Authors: Anggiyani Ni Wayan
Published: May 2022

Penelitian ini bertujuan untuk menghasilkan Lembar Kerja Siswa (LKS) berorientasi HOTS dengan bantuan program eXeLearning dan GeoGebra yang valid, praktis, serta efektif untuk meningkatkan pemahaman konsep siswa pada materi perbandingan kelas VII. Prosedur pengembangan E-LKS berorientasi HOTS ini menerapkan langkah-langkah dari model pengembangan ADDIE yang terdiri dari tahap analysis, design, development, implementation, dan evaluation. Uji coba terbatas dilakukan pada 25 siswa kelas VII H di SMP Negeri 1 Susut. Instrumen yang digunakan untuk menilai kualitas E-LKS yang dikembangkan adalah lembar penilaian LKS untuk menilai kevalidan, angket respon siswa untuk menilai kepraktisan, serta tes pemahaman konsep yang terdiri dari pretest dan post-test untuk menilai keefektifan. Kualitas E-LKS yang dikembangkan secara berturut-turut memperoleh skor rata-rata sebesar 4,47 dengan klasifikasi sangat baik sehingga dapat dinyatakan valid, rata-rata skor angket respon siswa sebesar 4,11 dengan klasifikasi baik sehingga dapat dinyatakan praktis, hasil analisis terhadap tes pemahaman konsep siswa memperoleh skor rata-rata sebesar 80,22% yang memenuhi klasifikasi baik, sedangkan persentase ketuntasan siswa mengalami peningkatan dari 8,00% menjadi 82,76% dengan klasifikasi sangat baik sehingga dapat dinyatakan efektif.
ETNOMATEMATIKA PADA BATIK KAWUNG SEBAGAI REFERENSI KONTEKS BARISAN DAN DERET ARITMATIKA
Authors: Safitri Silva yuliana , Latifah Dian , Angelani Naila
Published: May 2022

Penelitian ini bertujuan untuk mendeskripsikan etnomatematika yang terdapat pada Batik Kawung Yogyakarta sebagai referensi bahan ajar matematika. Adapun metode penelitian yang digunakan yaitu penelitian eksploratif berupa menggali dan menemukan dengan melakukan penjajakan terhadap pola yang terdapat dalam Batik Kawung Yogyakarta. Pendekatan yang digunakan etnografis, bertujuan mendapatkan deskripsi dan analisis mendalam tentang kebudayaan melalui kajian pustaka. Berdasarkan penelitian yang telah dilakukan, Batik Kawung Yogyakarta memiliki motif berbentuk aren dan kolang kaling, ini menunjukkan bahwa dalam Batik Kawung Yogyakarta terdapat unsur matematika yaitu pada motif yang membentuk pola barisan aritmatika dan deret aritmatika yang dapat dijadikan sebagai media pembelajaran matematika terkhusus pada materi pola baris aritmatika dan deret aritmatika.
ANALISIS KESULITAN SISWA DALAM MENYELESAIKAN SOAL CERITA PADA MATERI ARITMATIKA SOSIAL
Authors: Simarmata Justin Eduardo
Published: May 2022

This research aims to determine the difficulties of students in solving story problems on social arithmetic material for class VII Junior High School. The method used in this research is the descriptive qualitative method. The research subjects were students of class VII D State Junior High School 1 West Malakat. There are three kinds of students’ ability in this research, namely: low, medium, and high. Data collection techniques used are test, interview, and documentation. The instruments in this study were test questions and interview guidelines. Data analysis techniques in this research are data reduction, data presentation, and conclusion. Based on the research analysis, there are three conclusions, namely: 1) the student who has high score has been able to understand the concept well but the student still found difficulties on applying principles and verbal problems, 2) the student who has medium score has been able to understand the concept, but the student still found difficulties on applying principles and verbal problems, and 3) the student who has low score has not been able to understand the concept and apply the principles and also found difficulties on answering verbal problems.
Implementasi Bahan Ajar Berbasis Masalah Kontekstual Berbantuan Software Statistika Dalam Meningkatkan Hasil Belajar
Authors: Hartawan I Gusti Nyoman Yudi , Suryawan I Putu Pasek
Published: May 2022

Penelitian ini bertujuan untuk mengetahui pengaruh bahan ajar berbasis masalah kontekstual berbantuan software statistika terhadap hasil belajar mahasiswa pada matakuliah statistika nonparametric. Penelitian ini merupakan penelitian kuasi ekperimen dengan rancangan post-test only group design. Populasi dalam penelitian ini adalah mahasiswa semester VI Program Studi S1 Pendidikan Matematika. Sampel dalam penelitian ini dipilih menggunakan cluster random sampling. Data dalam penelitian ini dikumpulkan menggunakan tes hasil belajar. Data hasil belajar dianalisis menggunakaan uji t-independent  dengan tarafk signifikan 5%. Berdasrkan hasil analisis diperoleh thitung= 2.809 > ttabel = 1.678 dengan demikian hipotesis nol dapat ditolak, yang bermakna hasil belajar mahasiswa yang dibelajarkan dengan bahan ajar berbasis masalah kontekstual berbantuan software statistika lebih baik daripada mahasiswa yang dibelajarkan dengan bahan ajar konvensional
Double Rotating Wall Compression of Positron Clouds and Towards Resistive Cooling
Authors:   , Evans Hywel T.
Published: May 2022

Low energy positron clouds from a buer gas trap have been characterised and compressed by a novel double rotating wall (RW) electric field. A theoretical and experimental study comparing compression due to dipolar single and double RW electric fields is presented, with details of a custom-built function generator capable of operating on two sets of four, six, and eight-segment electrodes. The installation of a cylindrical Penning trap with two sets of six-segment RW elec-trodes has allowed the implementation of a double RW, which provides a better approximation to the electric potential in the model for independent charged par-ticle compression. A reduction in particle heating has been observed with the double RW, whilst obtaining at least equivalent compression as the single RW, which may in future allow a reduction in the minimum attainable cloud width.Without the use of RW electric fields, optimisations to positron ejection and recapture techniques led to positron clouds being held in a deep, harmonic poten-tial well for over 100 s, enabling time to study RW electric fields and to perform resistive cooling experiments.
Concepções prévias e Formação Continuada em Modelagem Matemática
Authors: Silva Marcio Virginio da , Klüber Tiago Emanuel
Published: May 2022

Este artigo decorre da hermenêutica que efetuamos do revelado nas categorias que emergiram da dissertação do primeiro autor sob orientação do segundo. Naquele momento, nossa interpretação se dirigiu a como as concepções prévias de um grupo de professores operaram quando se encontraram com a  formação em Modelagem Matemática segundo suas concepções sobre distintos núcleos de ideia. Neste momento, fizemos um caminho inverso, direcionamos nosso olhar para os distintos modos que essas concepções operaram e apontamos os aspectos desses núcleos de ideia que convergiram para este modo de operar, em outras palavras, realizamos uma meta-análise das categorias emergentes na dissertação a partir da qual a categorizamos em dois grandes núcleos. Nesse sentido, efetuamos uma pesquisa qualitativa sob um enfoque fenomenológico conduzida pela interrogação: O que se mostra das concepções prévias dos professores para sua formação continuada em Modelagem Matemática? O ato interpretativo nos conduz dizer que as concepções prévias dos professores apontam um caminho a seguir, de modo que as formações continuadas em Modelagem Matemática alcancem seus objetivos, ou seja, a adoção da Modelagem Matemática pelos professores da Educação Básica.
Pesquisa como princípio educativo em intervenções com a Modelagem Matemática na Educação Básica
Authors: Oliveira Jefferson , Lara Isabel Cristina Machado de
Published: May 2022

Este artigo é um recorte de uma tese de doutoramento em desenvolvimento e tem como objetivo compreender de que modo a Pesquisa como princípio educativo é abordada em intervenções com a Modelagem Matemática na Educação Básica. Para tanto, realizou-se uma Revisão Sistemática da Literatura em três bases de dados de divulgação de pesquisas acadêmicas nacionais e internacionais, sendo elas a Biblioteca Digital Brasileira de Teses e Dissertações - BDTD; a Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES; e a Networked Digital Library of Theses and Dissertations - NDLTD. Descreve o processo de busca e categorização das 71 pesquisas acadêmicas emergentes por meio da busca dos descritores utilizados. A análise dessas produções mostra que os autores não explicitaram relações entre os métodos de ensino elencados. No entanto, as pesquisas mostram que em uma intervenção com a Modelagem, a busca por conteúdos em sites da rede mundial de computadores ou o levantamento de dados são exemplos do ato de realizar pesquisa para os estudantes.
Aprendizagens de Professoras(es) que Ensinam Matemática Mediadas pela Participação em Práticas de Letramento Docente
Authors: Silva Neomar Lacerda da , Oliveira Andréia Maria Pereira de
Published: May 2022

Este artigo teve por objetivo identificar e analisar aprendizagens de professoras/es que ensinam Matemática mediadas pela participação em práticas de letramento docente. Para tanto, utilizamos uma abordagem qualitativa e ferramentas analíticas da Teoria Social da Aprendizagem e do letramento como prática social para promover uma compreensão teórica de aprendizagens de professoras/es ao fazerem usos de práticas de leitura e de escrita em um contexto de reuniões de estudo e planejamento de aulas, para os anos finais do Ensino Fundamental, em uma escola pública. O material empírico foi produzido por meio de observações dessas reuniões, entrevistas com professoras/es e análise de documentos. Os resultados indicam que ocorreram aprendizagens relacionadas à leitura e discussão de textos, à leitura e análise de tarefas e à elaboração de narrativas de aulas. A análise sugere que essas aprendizagens foram constitutivas da organização da própria prática de leitura e de escrita, daquilo que se lê e se escreve e de como isso foi realizado naquele contexto e como repercutiu na prática docente.
influência da compreensão leitora na resolução de problemas matemáticos
Authors: Fidelis Janaína Mota , Nogues Camila Peres , Lima Elielson Magalhães , Dorneles Beatriz Vargas
Published: May 2022

A resolução de problemas matemáticos envolve algumas habilidades específicas, entre elas, o raciocínio quantitativo, já consolidado na literatura como preditivo para o desempenho matemático, e a compreensão leitora, cuja relação com o desempenho na matemática necessita de mais estudos. Diante disso, este estudo buscou analisar as relações entre a habilidade de compreensão leitora e o desempenho na resolução de problemas matemáticos, considerando também o raciocínio quantitativo. Para tanto, 127 estudantes de 3º e 4º anos do Ensino Fundamental de duas escolas de Porto Alegre – RS realizaram as tarefas de raciocínio quantitativo, de compreensão leitora e de resolução de problemas matemáticos. Para a análise, dividiu-se a amostra em categorias de baixo, médio e alto desempenho em cada uma das tarefas. Os resultados mostraram que não houve associação significativa entre compreensão leitora e resolução de problemas, entretanto, encontramos associação significativa entre resolução de problemas e raciocínio quantitativo e entre raciocínio quantitativo e compreensão leitora. Corrobora-se a importância do raciocínio quantitativo para o desempenho matemático e defende-se que a resolução de problemas exige uma compreensão leitora com conhecimento para além da linguagem comumente utilizada no exercício de interpretação de textos escolares, mas de uma linguagem específica da matemática.
Análise de práticas efetivas de alunos em geometria espacial mediada por descrições prévias de técnicas de representação de sólidos geométricos em ambiente papel/lápis
Authors: Ramos Márcio Silveira , Henriques Afonso , Silva Farias Elisângela
Published: May 2022

Neste artigo, temos como objetivo analisar as práticas efetivas de alunos do 2o ano do Ensino Médio quando realizam tarefas sobre a representação de sólidos geométricos no ambiente papel/lápis, a partir da manipulação de modelos de Projetos de Construção de Objetos Concretos (PCOC) “que se leem peceocê”, obtidos por prototipagem rápida na impressora 3D. Para tanto, nos apropriamos da Análise Institucional e Sequência Didática como metodologia de pesquisa. Mergulhamos os estudos no quadro teórico constituído pela Teoria Antropológica do Didático, com ênfase na sua abordagem praxeológica, para fornecer-nos elementos de análise das técnicas e discursos tecnológico-teóricos, em Geometria Espacial, mobilizados pelos alunos nas suas práticas efetivas. Os resultados obtidos revelam que os alunos conseguem representar os sólidos considerados no ambiente papel/lápis, mas não indicam e nem descrevem as técnicas que utilizam nas referidas representações durante a realização das suas práticas efetivas. Este é, portanto, um problema da instituição de referência, em particular o 2o ano do Ensino Médio, que não fornece uma formação aos alunos envolvendo as referidas indicações e descrições, conforme procedemos no desenvolvimento da nossa análise a priori em torno dos PCOC que trabalhamos com estes alunos.
Concepções dos alunos
Authors: Balacheff Nicolas , Gaudin Nathalie , Almouloud Saddo Ag , Moretti Méricles Tadeu
Published: May 2022

Investigamos neste artigo a complexidade de modelar os saberes de matemática dos alunos sob as restrições de reconhecer sua possível falta de coerência e sua eficiência local. Para tanto, propomos a formalização da noção de “concepção” como uma possível ferramenta para responder ao problema epistemológico que identificamos. Aplicamos então esta abordagem a o estudo das possíveis concepções de “função”, de um ponto de vista histórico e depois epistémico. Relatamos o resultado de um estudo de caso para ilustrar o benefício que esperamos dessa abordagem. As noções de “concepção”, “saber” e “conceito” são então relacionadas entre si dentro do modelo apresentado.
Controle, prova e demonstração
Authors: Balacheff Nicolas , Almouloud Saddo Ag , Moretti Méricles Tadeu
Published: May 2022

Raciocinar é uma das seis competências da base comum da matemática do 4º ciclo (anos 7, 8 e 9 do currículo obrigatório na França). Inclui provar, argumentar, demonstrar, e afirma a centralidade da demonstração. As avaliações do programa reconhecem a dificuldade desse ensino. O texto a seguir questiona os avanços na pesquisa sobre a aprendizagem e o ensino de demonstração e sua capacidade de esclarecer a implementação dos programas atuais. Ele volta ao vocabulário, insistindo em particular nos diferentes regimes de validação da atividade do aluno. Em seguida, aborda essas questões na problemática da validação no sentido da teoria das situações didáticas. Os temas principais são a articulação entre prova e conhecimento, evocando brevemente o modelo ck¢, e a relação entre prova e argumentação.
devolução de um problema e a construção de uma conjectura, o caso da soma dos ângulos de um triângulo
Authors: Balacheff Nicolas , Almouloud Saddo Ag , Moretti Méricles Tadeu
Published: May 2022

Este estudo faz parte do projeto de pesquisa que conduzi durante os anos 80 sobre as concepções de prova em matemática de alunos do ensino fundamental antes do ensino de prova matemática [em francês: demonstração]. A primeira parte deste projeto resultou na identificação de diferentes tipos de provas que os alunos podem mobilizar. A segunda parte investigou o princípio de design de situações que poderiam apoiar uma evolução das concepções dos alunos de provas susceptíveis de servir como uma base para o ensino de provas matemáticas; este artigo relata dois estudos de caso realizados neste projeto. Ele detalha os princípios de design, a implementação e a análise de uma sequência de situações destinadas a gerar debate sobre provas e refutações. Ele assume o desafio de rejeitar as provas empíricas para abrir o caminho para as provas intelectuais em que o ensino poderia fundamentar a introdução da prova matemática. Esta tradução do relatório inclui comentários, notas (Nota2020) e novas referências para facilitar a leitura e compreensão do leitor contemporâneo.
Implementing Schoology in Blended Learning Environment and Its Relation to Creativity in Writing
Authors:   Universitas Lampung, Viollita Ketrin , Raja Patuan ,   Universitas Lampung, Nurweni Ari ,   Universitas Lampung
Published: May 2022

This research was done to find out 1) whether there is any significant difference in the students' writing achievement before and after the implementation of Schoology in blended learning environment and 2) the difference of students’ writing achievement between students who have high creativity low creativity.. Quantitative design was done with one group pre-test and post-test design. The instruments used were the creativity and writing test. Paired samples t-test and ANOVA were used to analyze the data. The results showed that 1) there is a significant difference of students' writing achievement since t-value (9.029)> t-table (2.069) with sig. level<0.05 and 2) There is a significant difference in writing achievement between students who have high creativity and low creativity. Thus, it can be concluded that the implementation of Schoology is an effective way to teach writing and it gives an impact to the students in constructing and showing their best ideas in written form.
The Implementation of Wh-Question Technique to Increase Students’ Reading Comprehension Ability of Narrative Text at The Second Grade SMAN 2 Tulang Bawang Udik
Authors:   Universitas Lampung, Fatmawati Nuri , Sutarsyah Cucu ,   Universitas Lampung, Nurweni Ari ,   Universitas Lampung
Published: May 2022

The aim of this study was to find out whether the use of the wh-question technique improved the students’ reading ability. This study was a quantitative study. Reading tests were used as the instrument to elicit the data. The subjects of this research were 60 second grade students of SMAN 2 Tulang Bawang Udik. The result showed the students who were taught through wh-question technique had better achievement and the difference was statistically significant. This suggests that wh-question technique facilitates the students to improve their reading ability.
The Comparative Study of Reading Comprehension Achievement between Students with Extrovert and Introvert Personality
Authors:   Universitas Lampung, Ningrahayu Widaty Prayoga , Sutarsyah Cucu ,   Universitas Lampung, Suka Ramlan ,   Universitas Lampung
Published: May 2022

The current research was aimed at investigating the differences of reading comprehension between the students with extrovert and introvert personalities. Those applied Expost Facto research design or Criterion Group Study. The subjects of this research were 30 students of SMAN 14 Bandar Lampung. Questionnaire and reading test were used to collect the data. The data were analyzed by using Independent T-Test. The results showed that there was a statistically significant difference of reading achievement between introvert and extrovert students in with the significant level <0.05. This suggests that personalities play important roles in reading comprehension achievement. That is, the students with introvert personality perform better in reading comprehension rather than the students with extrovert personality.
Clinical and pathogenetic features of the development of non-communicable diseases depending on the degree of comorbidity, the stage of cardiovascular continum
Authors: Nevoit G. , Potiazhenko M.
Published: May 2022

The article is devoted to the clinical study of the clinical and pathogenetic features of the development of non-communicable diseases, depending on the degree of comorbidity and the stage of the cardiovascular continuum.The aim was to determine the clinical and pathogenetic features of the development of non-communicable diseases, depending on the degree of comorbidity and the stage of the cardiovascular continuum, and to improve the methodology of patient management, taking them into account accordingly.Material and methods. 439 people were examined in an open, non-randomized, controlled study. 253 people were sick with non-communicable diseases (main group) and 186 people were functionally healthy respondents (control group). All participants in the study underwent a retrospective assessment of medical records, with the calculation of the history of diseases, assessment of the degree of comorbidity and determination of the stage of the cardiovascular continuum.Results. It was found that the principle of diagnostic monism is not an adequate methodological approach for all patients with non-communicable diseases since there were no people with one verified diagnosis among them. A significant increase in the average number of diagnoses was noted between the subgroups of the control group and the main group. An increase in the level of comorbidity in terms of CIRS, Charlson index, SCORE was noted between the control subgroups and subgroup 1 of the main group (p <0.0001), between subgroup 1 and other subgroups of the main group (p <0.0001), between subgroup 2 and subgroups 3 and 4 (p <0.0001).

Conclusions. Comorbidity is a characteristic feature of non-communicable diseases, a manifestation of the systemic progression of metabolic disorders. It significantly increases with the age of patients and it has a significant increase in the number of diagnoses and the risk of death from cardiovascular diseases in the development of the cardiovascular continuum with the maximum number of diagnoses at the stage of its complication. The cardiovascular continuum plays a key role in increasing comorbidity, the risk of death. It determines the prognosis and is an integral part of the overall continuum in non-communicable diseases and has a comorbid relationship with diseases of the upper gastrointestinal tract as the basis of the metabolic pattern. Comorbidity should be taken into account in the management of patients as a manifestation of the systemic progression of metabolic disorders and the general continuum in non-communicable diseases.
Angiographic characteristics of patients with acute myocardial infarction complicated by acute high-grade heart failure
Authors: Solomonchuk A.
Published: May 2022

The aim of the work is to optimize local pharmacotherapy in the complex treatment of generalized periodontitis on the background of urolithiasis with the use of dental film.Material and methods. of the study was to evaluate the features of the angiographic picture among patients with acute myocardial infarction (AMI), which was complicated by acute heart failure (AHF). Materials and methods. This study is a retrospective analysis of 828 hospital charts of patients treated from STEMI in the Department of Myocardial Infarction of the Vinnytsia Regional Center of Cardiovascular Pathology. Two groups of patients were analyzed: group I (n = 699) patients with AMI without signs of high-grade acute heart failure (AHF) and group II (n = 129) patients with AMI complicated by high-grade AHF (Killip III and Killip IV).Results. Urgent coronary angiography (UCA) was performed for 456 (55.1%) patients, urgent revascularization was performed for 435 (52.5%) patients, for part of them - 403 (48.7%) patients were performed coronary artery stenting (CAS), for 18 (2, 2%) of them were performed thrombus aspiration, 2 (0.2%) of them were done angioplasty of the spacecraft without stent implantation. For 24 (2.9%) patients was carried out thrombolysis At the prehospital stage and 12 (1.4%) of them required further stenting of the spacecrafts in the coronary arteries. 21 (2.6%) patients did not require revascularization, according to the results of coronary angiography. In the general group of examined patients overwhelmed cases with a single vascular impression of CA 241 (52.8%) (p = 0.003). It was found that patients from group I had a single vascular 218 (57.2%) and double vascular - 105 (27.6%) damage of CA (p = 0.058) significantly more common, and 58 (15.2%) of investigated patients had multivascular damage of CA - which was less often among patients from group I. In the second group there was an even distribution of patients with single vascular 23 (30.7%), double vascular (28 (37.3%) and multivascular 24 (32.0%) damage of CA.
Kemampuan HOTS Siswa Melalui Model PjBL Ditinjau dari Kemampuan Literasi Kimia Siswa
Authors: Simamora Khairul Fahmi
Published: May 2022

The application of HOTS for students is very urgent, considering the times with extraordinary challenges. The application of 21st century learning skills to improve students' HOTS requires the involvement of all parties in the educational environment, and not only at the concept level, but also in the form of real practice. This study aims to determine the students' HOTS ability in stoichiometry learning through the PjBL model in terms of chemical literacy abilities. This research is a quasi-experimental study using a 2x2 factorial design. The results of the research showed that there were differences in the HOTS abilities of students who were given the PjBL model compared to the direct learning model, there were differences in students' HOTS abilities in terms of students' chemical literacy abilities and there was no interaction between the learning model and students' chemical literacy skills on students' HOTS abilities.
Pengembangan Video Pembelajaran dengan Bantuan Software Wondershare Filmora pada Materi Reaksi Reduksi Oksidasi
Authors: Parera Lolita A M , Christianto Heru , Lazar Antonius Petrus Pana
Published: May 2022

This research aims to determine the form of the development of learning videos on the subject matter of oxidation reduction reactions (redox) with the help of wondershare filmora software so that they can become effective media in the learning process and to determine their feasibility. The procedure taken to produce the product is divided into 4 stages, namely: (1) determining the material to be developed, (2) carrying out design and development, (3) producing wondershare filmora software or packaging learning videos, and (4) conducting a formative evaluation and revise development product. The results of the assessment from material experts and media experts on the feasibility of this learning video have a very good category with an overall ideal percentage of 84,69% each in terms of the material presented and 90.5% in terms of the media displayed. The results of the peer reviewer test assessment of this learning video is 80,9% with a very good category. As for the results of the assessment of student responses to this learning, it is included in the very good category with an ideal percentage of 97.25% for small group trials and 98.75% for large group trials, respectively.  Keywords: Development, Learning Video, Wondershare Filmora, Oxidation Reduction Reaction
THE GLOBAL MARKET FOR EXCHANGE-TRADED DERIVATIVES: 21ST CENTURY TRENDS, INNOVATION AND FAILURE
Authors: Gay Gerald , Emm Ekaterina , Ma Han , Ren Honglin
Published: May 2022

Utilizing a comprehensive database spanning 110 exchanges in five geographic regions, we examine trends in trade activity and contract innovation of exchange-traded futures and options over the period 2002–2021. We find that global volume has experienced a ten-fold increase driven by significant increases at Asian and North American exchanges, and primarily in the equity, interest rate and currency asset classes.  New contract innovation has been greatest in North America and in the energy and equity asset classes. Further, volume and open interest attributable to new contract innovation have now surpassed those of legacy contracts.  Turnover showed a significant increase driven largely by trade activity in Asian markets.  Finally, new contract failure rates have been highest at North American exchanges as well as in the interest rate and energy asset classes.
BOAREN: IMPROVING REGULARIZATION IN LINEAR REGRESSION WITH AN APPLICATION TO INDEX TRACKING
Authors: Angus John , Ding Yujia , Peng Qidi
Published: May 2022

In this paper we introduce the Arbitrary Rectangle-range Elastic Net (AREN): an elastic net with coefficients restricted to some rectangle in , . The AREN method is one of many regularization techniques intended to increase prediction accuracy in linear regression models by shrinking the magnitude (and possibly eliminating some) of the regression coefficients in an effort to control over-fitting and under-fitting. In this work we describe the AREN features and discuss its statistical consistency properties in estimation and in selecting the correct set of predictors. We also introduce bootstrapping as a way to improve the “small-sample” performance of AREN in selecting predictors. We then apply the AREN (with and without bootstrapping) to tracking the value of the S&P 500 index using a reduced set of stocks.
PROFESSOR ROBERT I. WEBB’S CONTRIBUTIONS TO THE FIELD OF DERIVATIVES
Authors: Frijns Bart , Tourani-Rad Alireza
Published: May 2022

It is a great pleasure to publish this special issue dedicated to Professor Robert I. Webb for his outstanding contributions to academia. Professor Web, the Paul Tudor Jones II Research Professor at the McIntire School of Commerce at the University of Virginia in Charlottesville was the Editor-in-Chief of the Journal of Futures Markets for 24 years, from 1997 to 2021. Through his efforts as an Editor, he has shaped and influenced derivatives research around the globe, lifting standards, indicating research directions, and engaging with derivative communities worldwide. To recognize the contributions of Prof. Webb, we have solicited papers from various editorial board members of the Journal of Futures Markets that make up this special issue.
GAME EDUKASI MOBILE "AKU SUKA SAYUR" BERBASIS AUGMENTED REALITY UNTUK ANAK USIA DINI
Authors: Vivianti Vivianti , Ratnawati Dwi
Published: May 2022

This research aims to develop a mobile based educational game application "I like vegetable" for preschoolers. The research method used in developing educational games is the research and development (RD) method adapted from Borg Gall with several stages, namely needs analysis, identification of product specifications, product development, product validation, product revision and product testing. This study involved 8 research respondents with the object of research being the mobile educational game "Aku Suka Sayur" with the Augmented Reality feature. Data was collected using a questionnaire filled out by the guardian of the respondent. This study uses descriptive analysis data analysis techniques.The final product is a mobile educational game application with the title "I Like Vegetables". Augmented Reality technology in the form of live coloring is applied in this educational game to increase children's attractiveness. The calculation results show that the feasibility score of the Augmented Reality-based educational game application developed is 93.75%, including the very feasible category. Augmented Reality technology allows interaction between applications and the environment. In other words, children do not only focus on smartphones, but also do other activities and interact with the environment.
PENGGUNAAN E-BOOK UNTUK MENINGKATKAN MINAT BACA SISWA SEKOLAH MENENGAH PERTAMA
Authors: Fitriyanti Puji
Published: May 2022

The purpose of this study was to analyze the increase in reading interest through the use of e-books in class IX D SMPN 2 Mayang.The method used in this research is Guidance and Counseling Action Research (PTBK) which was carried out in two cycles. Each cycle includes four stages of planning, implementing action, observing and reflecting. The subjects in this study were students of class IX D in the 2020/2021 academic year as many as 30 students. Data collection techniques using test, observation and interview techniques. Data were analyzed qualitatively and quantitatively.Based on the observation of the initial conditions before the study was conducted, the percentage of students' interest in reading was only 37%. After the action was taken, namely the use of e-books as a source of literacy in guidance and counseling services, the percentage of students' interest in reading increased. In cycle 1 the percentage of students' completeness increased to 50% while in cycle 2 it reached 70%. This increase in the percentage of students' reading interest shows that the use of e-books as a reading source in digital literacy has succeeded in increasing students' reading interest.
STRATEGI ADAPTASI BUDAYA MAHASISWA PROGRAM STUDI PGSD TEGAL UNNES DALAM MENGHADAPI PERBEDAAN KEBUDAYAAN
Authors: Astuti Tri
Published: May 2022

The purpose of this study is to examine the cultural adaptation strategies of students in dealing with the differences in the city of Tegal and the obstacles they face in implementing cultural adaptation strategies.The research method used is a qualitative approach with the type of case study. The research was conducted at the Tegal PGSD campus and Kemandungan Village, Tegal City. The research subjects were PGSD Tegal FIP UNNES students. Data collection techniques used include observation, documentation and interviews. Interviews were conducted on students, Kemandungan residents and lecturers. Testing the validity of the data using triangulation techniques, namely source triangulation and technical triangulation. Data Analysis Techniques used in the Interactive Model Data Analysis include 1) Data Reduction 2) Presentation 3) Conclusion Drawing.The results of the study found that students carried out cultural adaptation strategies in the Tegal community by: 1) Understanding the way of life of the Tegal people, both through direct and indirect interactions, 2) Trying to accept cultural differences between them, 3) Damaging egocentrism and primordialism in themselves because in fact they are living in Tegal. The obstacles faced by PGSD UPP Tegal students in dealing with cultural differences in the City of Tegal are: a) Difficulty in translating the language and dialect used by the local community, b) Limited space for students at the village level, for example reluctance to join social organizations, c) Busy students on campus, For example, studying and joining campus organizations that are not related to the community.
ANALISIS TINGKAT KEPUASAN WALI MURID TERHADAP SISTEM ZONASI SEKOLAH
Authors: Qiptiah Devi Mariatul , Prawira Sophian Djaka
Published: May 2022

The purpose of this study is to analyze the level of satisfaction of guardians of students who live far away (more than 3 kilometers) and guardians of students who live near (less than 3 kilometers) of SMPN 1 Jember with respect to the New Student Registration (PPDB) zoning system.The research method used is qualitative. The research implementation stage is a preliminary study, determining research methods, collecting data, analyzing data, validating data, and compiling reports. Research informants were determined purposively. Data collection techniques using observation, interviews, and documentation. Data analysis techniques through data reduction, data exposure, and drawing conclusions.The results of the study found that first, an analysis of the level of satisfaction of the guardians of students who live far from SMPN 1 Jember to the PPDB zoning system that is not satisfied. The guardians of students hope that the implementation of new student admissions through the zoning system may continue to be enforced on the condition that they continue to provide equal opportunities to students who will enter through the zoning route. Second, the analysis of the level of satisfaction of parents who live near from SMPN 1 Jember to the PPDB zoning system is not satisfied because even though their children can easily enter through the zoning system, it is still hoped that there will be a balance between the zoning path and achievement.
PENGARUH MODEL PROBLEM BASED LEARNING BERBASIS ALAT PERAGA MANIPULATIF TERHADAP PEMAHAMAN KONSEP MATEMATIKA DAN RASA PERCAYA DIRI SISWA
Authors: Azis Muhamad , Murtono Murtono , Suad Suad
Published: May 2022

The purpose of the study was to analyze the effectiveness of the Problem Based Learning model based on manipulative teaching aids on the understanding of mathematical concepts and the self-confidence of elementary school students.The research method used is experimental research methods. The research design used is a pre-experimental one group pre-test-posttest design. In this study, the sample was grade VI SDN 1 Kangkung Demak students. The independent variable in this study is Problem Based Learning with manipulative teaching aids and the dependent variable is understanding mathematical concepts and students' self-confidence. Data collection uses observation to obtain data about students' self-confidence. The researcher used a questionnaire/questionnaire technique to obtain data on the PBL learning model with manipulative teaching aids in mathematics. The test instrument is in the form of a description of 10 questions, meanwhile a questionnaire is used to collect research data about the level of students' self-confidence.The results showed that based on the t-test, the t-value was 23,359, while the t-table with df=43 was 2.0195, the t-count t-table (23,359 2.0195), which means that the PBL model based on manipulative teaching aids is effectively used to increase the self-confidence of elementary school students. The effectiveness of PBL learning based on manipulative teaching aids is proven to increase students' understanding of mathematical concepts and self-confidence.