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Analisis Minat Dan Keterampilan Proses Dalam Pembelajaran Matematika, Kamid Kamid, Khairul Anwar, Dewi Iriani, Ahmad Mansur Nawahdani

Jurnal Riset Pendidikan Matematika

Penelitian ini bertujuan untuk mengungkap perbandingan keterampilan proses siswa dalam mata pelajaran matematika dari dua sekolah, perbandingan minat siswa dalam mata pelajaran matematika dari dua sekolah, serta hubungan antara keterampilan proses dan minat siswa pada mata pelajaran matematika. Penelitian ini jenis kuantitatif dengan tipe asosiatif dan komparatif. Sampel terdiri dari 70 siswa dari suatu SMP negeri dan 70 siswa dari suatu MTs negeri di daerah Batanghari, Jambi, Indonesia. Teknik pengambilan sampel yang digunakan adalah purvosive sampling. Data minat dan keterampilan proses dikumpulkan dengan angket yang telah divalidasi. Data dianalisis secara deskriptif dan inferensial dengan paired sample t-test dan p …

An Analysis Of Proportional Reasoning Ability Of Junior High School Students, Fitria Mardika, Ali Mahmudi

Jurnal Riset Pendidikan Matematika

This study aims to describe proportional reasoning skills and students' difficul­ties in solving proportional reasoning problems. The population of this research was 3480 seventh-grade students of state junior high schools in the Yogyakarta region. The samples were 158 students chosen using proportionate stratified random sampling that represent four categories of school (very high, high, me­dium, low) based on the average scores of the national examination in mathe­matics in 2016. Data were collected through essay tests and interviews. Data were analyzed quantitatively and qualitatively. The result showed that the stu­dents in very high and high category schools had moderate proportional rea­soning …

Kesulitan Siswa Sma Dalam Menyelesaikan Soal Matematika Pada Materi Peluang, Annisa Fitri, Agus Maman Abadi

Jurnal Riset Pendidikan Matematika

Penelitian ini bertujuan untuk mendeskripsikan jenis kesulitan siswa SMA dalam menyelesaikan soal matematika pada materi peluang di Kabupaten Indragiri Hilir. Penelitian ini termasuk penelitian survei dengan pendekatan kuantitatif dan kualitatif. Sampel penelitian sebanyak 284 siswa SMA kelas XI Program IPA di Kabupaten Indragiri Hilir, Indonesia, yang berasal dari sepuluh sekolah dengan kategori tinggi, sedang, dan rendah. Sampel penelitian ditentukan menggunakan teknik stratified propotional random sampling. Instrumen yang digunakan berupa tes yang telah divalidasi oleh ahli (expert judgement). Kesalahan siswa dijustifikasi berdasarkan Newman's errors categories. Hasil penelitian menunjukkan bahwa jenis kesulitan siswa dalam menyelesaikan soal matematika pada …

Efektivitas Model Pembelajaran Creative Problem Solving Ditinjau Dari Kemampuan Penalaran, Komunikasi, Dan Self Esteem, Abdillah Rachman, Raden Rosnawati

Jurnal Riset Pendidikan Matematika

Tujuan penelitian ini adalah mendeskripsikan perbedaan efektifitas model pembelajaran creative problem solving dan model pembelajaran konvensional ditinjau dari kemampuan penalaran, komunikasi, dan self-esteem. Penelitian ini adalah penelitian quasi-experiment dengan desain penelitian nonequivalent comparison group design. Subjek penelitian merupakan peserta didik di salah satu MAN di Purbalingga, Jawa Tengah, Indonesia, pada materi transformasi geometri. Sampel terdiri dari 60 siswa dari dua kelas IPA yang masing-masing mengikuti model pembelajaran konvensional dan model pembelajaran creative problem solving. Instrumen penelitian ini terdiri dari tes kemampuan penalaran, tes kemampuan komunikasi serta angket self-esteem. Teknik analisis menggunakan analisis deskriptif dan Hotteling's Trace …

Mathematics Pre-Service Teacher's Metacognitive Failure In Mathematics Online Learning, Alifiani Alifiani, Surya Sari Faradiba

Jurnal Riset Pendidikan Matematika

This study aims to reveal the metacognitive failures experienced by mathematics pre-service teachers based on their mistakes when solving problems in online learning during the pandemic era. This case study involved 29 participants who attended the mathematical problem test and cognitive style test, the two participants were categorized based on their cognitive style: Field Dependence (FD) and Field Independence (FI). The instrument used was a mathematical problem test to collect data on metacognitive that adapted from Stewart and a cognitive styles test to categorize the cognitive style that adapted from the Group Embedded Figures Test (GEFT). An interview was conducted …

The Effectiveness Of Treffinger's Learning Model In Increasing The Creativity And Mathematics Achievement Of Gifted Students, Kana Hidayati, Ni Kadek Swari Nandini, Mazlini Adnan

Jurnal Riset Pendidikan Matematika

This study aims to describe the difference in creativity and mathematics achievement between gifted students who were taught by Treffinger's learning and those who thought by the expository learning in trigonometry material. This study is a quasi-experiment using a pretest-posttest group design with a population of all gifted students in class X of a State Senior High School in Bali, Indonesia. The sample was established randomly. Observation sheets, pre-test, post-test, and student creativity questionnaires were used, all of which have been validated. The data were analyzed descriptively and inferentially with the paired sample t-test to test the mean difference of …

The Role Of Microorganisms In Rare Earth Elements Bioaccumulation, Maedeh Soleimanifar

Dissertations

Rare earth elements (REE) are valuable raw materials in our modern life. Extensive REE application from electronic devices to medical instruments and wind turbines, and non-uniform distribution of these resources around the world, make them strategically and economically important for countries. Current REE physical and chemical mining and recycling methods could have negative environmental consequences, and biologically-mediated techniques could be applied to overcome this issue.

In this research, the first objective is to investigate the bioextraction of cerium oxide and neodymium oxide nanoparticles (REE-NP) by a pure culture Methylobacterium extorquens AM1 (ATCC®14718™). Results show that adding up to 1,000 ppm …

An Analysis Of Mathematics Understanding Of Prospective Student-Teachers Of Mathematics, Ali Mahmudi

Jurnal Riset Pendidikan Matematika

This quantitative-qualitative descriptive study aims to reveal the mathematics understanding of prospective student-teachers, describe the types of their mistakes in mathematics understanding, and recommend appropriate teaching of mathematics understanding. The subjects were 34 first-year students taking the Geometry course in the Mathematics Education Study Program, at a State University in Yogyakarta, Indonesia. The test instrument was consisting of four items, two of which were about the problems of procedural instrumental understanding and the other two were about the problems of relational understanding. The data were analyzed through the stages of reducing data, presenting data, and concluding data. The results show …

Enhancing Primary School Students' Competencies In Step By Step Controllable Argumentation Using A New Learning Environment, Dekriati Ate

Jurnal Riset Pendidikan Matematika

For the goal of raising the mathematical performance of students, the quality of teaching has to be improved in the direction that critical thinking and a step-by-step controllable argumentation have to be established. Metacognitive activities of teachers and students can support this. The goal of the design research presented in this paper is to show how metacognitive activities in classroom discussions can be fostered and the mechanisms can be uncovered. For this purpose, on the one hand, a new learning environment - designed for learning addition and subtraction of integers in grade four - has been created. On the other …

The Relationship Of Students' Prior Knowledge And Emotional Intelligence To Mathematical Connection Ability, Muhammad Daut Siagian, Suwanto Suwanto, Rosliana Siregar

Jurnal Riset Pendidikan Matematika

Students should have a good mathematical connection ability to support their learning success. Many factors affect the mathematical connection ability, in­cluding prior knowledge and emotional intelligence. This study aimed to des­cribe the simultaneous and partial effect of students' prior knowledge and emo­tional intelligence on mathematical connection ability. This study involved 34 ninth graders of one of the public junior high schools in Lembang Regency, Indonesia, as the sample. The data was collected using a test consisting of a prior knowledge test and a mathematical connection ability test on the circle topic, and a questionnaire to measure students' emotional intelligence. We …

Students' Mathematical Reasoning Ability In Solving Post-Covid-19 Pisa Model Math Problems, Linda Linda, Ira Asyura

Jurnal Riset Pendidikan Matematika

This study aims to describe the reasoning abilities of high school students in Pandeglang Regency, Indonesia in solving post-Covid-19 PISA model math problems. The subjects of this study were 80 students of two state senior high schools in Pandeglang Regency, Indonesia. The data collection used a written test consisting of four description questions in the form of PISA model math questions (levels 2, 3, 4, and 5), and were through interviews and documentation. The data analysis followed the steps of data reduction, data presentation, and conclusion drawing. The results show that the reasoning abilities of Pandeglang Regency high school students …

Tahap Berpikir Geometri Siswa Smp Berdasarkan Teori Van Hiele Ditinjau Dari Keterampilan Geometri, Sdyoko Susanto, Ali Mahmudi

Jurnal Riset Pendidikan Matematika

Penelitian ini bertujuan untuk mendeskripsikan tahap berpikir geometri siswa SMP menurut teori Van Hiele ditinjau dari keterampilan geometri. Jenis penelitian adalah deskriptif menggunakan pendekatan kualitatif. Sampel penelitian adalah sembilan siswa kelas VIII dari tiga SMP Negeri Kota Sampit yang dipilih menggunakan teknik stratified proportional random sampling dan dilanjutkan dengan purposive sampling. Data penelitian dikumpulkan melalui wawancara mendalam terhadap subyek setelah diberikan tes keterampilan geometri. Teknik analisis data yang digunakan adalah kualitatif secara interaktif maju berkelanjutan di antara pengumpulan data, reduksi data, penyajian data, triangulasi data, dan penarikan kesimpulan. Hasil penelitian mengungkapkan bahwa: (1) keterampilan geometri siswa beragam pada tiap …

High School Students' Attitudes Toward Mathematics And Its Relation To Mathematics Learning Achievement, Khairiani Idris, Khazila Khazila, Agustina Agustina, Lisa Lisa

Jurnal Riset Pendidikan Matematika

Attitudes toward mathematics have been acknowledged among factors related to students' mathematics learning achievement. The positive attitudes may de­crease when the education level getting higher. This study applied a mixed-method approach to describe students' attitudes toward mathematics and to analyze the correlation between attitudes toward mathematics and mathematics learning achievement among students in the coastal area of Aceh Province, spe­cifically in Lhokseumawe City and North Aceh Regency. Total of 481 eleventh graders completed attitudes toward mathematics questionnaire online and 19 of them were involved in semi-structured interview. Data of mathematics learning achievement was obtained from students' scores in their report …

Semiotics Of Mathematics Problem-Solving In Mason's Generalization, Ihda Mutimmatul Fitriyah, Yuni Arrifadah, Siti Lailiyah

Jurnal Riset Pendidikan Matematika

Semiotics are signs that include codes, symbols, words, icons, objects, or gestures. This descriptive-qualitative study aimed to describe the semiotics of mathematics problem-solving in Mason's generalization. Generalization is a finding pattern process in which students will use the different strategies with some semiotics. The subjects were three of 30 eleventh graders from a senior high school in Gresik Regency, Indonesia, that were selected using the purposive sampling technique. Data was collected through documentation, written test, and interview. Data was analyzed by reducing data, presenting data, and concluding. The results of this study showed that students could present the semiotics of …

Character Education Strengthening Model During Learning From Home: Ki Hajar Dewantara's Scaffolding Concept, Hasti Robiasih, Ari Setiawan, Hanandyo Dardjito

Jurnal Penelitian dan Evaluasi Pendidikan

In providing educational and learning services to students during the Covid-19 Pandemic, learning is carried out from home. The disparity in learning achievements, especially related to attitude competencies, is strongly experienced during learning from home. This study aims to integrate attitude values through learning with Ki Hajar Dewantara's scaffolding concept: Identifying, Imitating, Developing, Dissemi-nating. This scaffolding is applied to strengthen the character of junior high school students in Yogyakarta Special Region to become Pancasila students. This is a research and development study that applies a qualitative approach. The respondents of this study were teachers, principals, students, parents, and supervisors of …

Analysis Of Mathematics Test Items Quality For High School, Budi Manfaat, Ayu Nurazizah, Muhamad Ali Misri

Jurnal Penelitian dan Evaluasi Pendidikan

This study aims to determine the quality of the mathematics test items at high school in terms of validity, reliability, differentiation, difficulty level, and distractor effectiveness. This study is an evaluation type of research with a quantitative approach. The subjects in this study were 44 class XII students of SMKN 3 Kuningan and 39 class XII students of SMAN 1 Jalaksana. The results show that the majority (96.67%) of the items are declared valid in content by the experts. The test has very high reliability (0.90). The items have the ideal difficulty level. Most of the questions (70%) have medium …

Design And Learning-Based Decoding Of Low-Density-Parity-Check Codes For Multiterminal Communication, Salman Habib

Dissertations

The field of information theory was initiated by Claude Shannon in 1948. According to his most notable work, data can be transmitted reliably over a noisy communication channel with high probability, as long as a suitable coding scheme is employed to protect the data from channel noise. Since then, coding theorists have made numerous attempts to design low-complexity error correcting schemes which achieve the Shannon limit.

In the 1960s, Robert Gallager introduced sparse graph-based low-density-parity-check (LDPC) codes which are practically suitable for various coding applications, mainly due to their low encoding and decoding complexity compared to classical codes (e.g., Reed-Muller …

Fluorescence Probes For Bioimaging: Synthesis, Photophysical Properties And Applications, Mehrun Nahar Uddin

Dissertations

Fluorescent probes are a vital tool in the study of cell imaging. There are many types of fluorescent probes ranging from inorganic and organic nanoparticles to organic molecules. When used judiciously, they can help provide essential information on cellular structure and function. The introduction of two-photon microscopy has expanded the need for new probes, in particular near-infrared (NIR) absorbing and emitting fluorescent probes. The photochemical and photophysical properties of NIR probes play a crucial role in their effectiveness in cell imaging by both conventional and two-photon excitation (2PE) microscopy. In this research, the synthesis, photophysical properties, and two-photon absorption (2PA) …

Bodipy Based Photodynamic Therapy And Potassium Probes, Xiangshan Liu

Dissertations

Boron dipyrromethene (BODIPY) has become more and more popular in photophysical and biological applications. BODIPY based fluorescence compounds have numerous advantage properties including low toxicity, high absorption extinction coefficients, high fluorescence quantum yields, sharp fluorescence emissions, and resistance to photobleaching. All the good properties lead to the wide applications of BODIPY based compounds. In this research, two different kinds of BODIPY are synthesized. Firstly, BDBrC containing carbazole and BODIPY core is synthesized. Cellular uptake research shows BDBrC can target on lysosome and singlet oxygen generation research result indicates that BDBrC can be used in photodynamic therapy. BDBrC also shows pH-sensitive …

Forecasting Locational Marginal Prices In Electricity Markets By Using Artificial Neural Networks, Kim Jay R. Rosano, Allan C. Nerves

Journal of Economics, Management and Agricultural Development

Electricity price forecasting is an important tool used by market players in decision-making and strategizing their participation in the electricity market. In most studies, market-clearing price is forecasted as it gives an aggregated overview of system price. However, locational marginal price (LMP) gives better outlook of the price particular to the customer location in the electrical power grid. This study utilizes Artificial Neural Networks to forecast weekday LMP of generator and load nodes. Various inputs such as historical prices and demand, and temporal indices were used. Using data for selected nodes of the Philippine Wholesale Electricity Spot Market, forecast Mean …

In The Name Of Diversity: Why Mandatory Diversity Statements Violate The First Amendment And Reduce Intellectual Diversity In Academia, Daniel M. Ortner

Catholic University Law Review

In the 1950s and 1960s in many parts of the country, a professor could be fired or never hired if he refused to denounce communism or declare loyalty to the United States Constitution. The University of California system took the lead in enforcing these loyalty oaths. These loyalty oaths were challenged all the way up to the United States Supreme Court and were soundly rejected, establishing the centrality of academic freedom and open inquiry on the university campus. So why are loyalty oaths making their resurgence in the form of mandatory diversity statements? Universities have begun requiring faculty members to …

The Characteristics Of Chemistry Test Items On Nationally-Standardized School Examination In Yogyakarta City, Ummul Karimah, Heri Retnawati, Deni Hadiana, Pujiastuti Pujiastuti, Eri Yusron

REID (Research and Evaluation in Education)

This study aimed to describe the characteristics of chemistry test items in Nationally Standardized School Examination or Ujian Sekolah Berstandar Nasional (USBN), consisted of discrimination index, difficulty index, and question reliability. The data were collected by using documentation of the answers of 194 students. The type of research was descriptive exploratory with quantitative and qualitative approaches. Quantitative data analysis was performed by using the classical test theory approach and item response theory with 1 logistical parameter. Meanwhile, qualitative data analysis was conducted to describe the items categorized as difficult and bad categories. The results show that, according to classical test …

English As A Foreign Language (Efl) Learning Assessment In Single-Sex And Co-Educational Classrooms, Umi Farisiyah, Badrun Kartowagiran, Aminuddin Bin Hassan

REID (Research and Evaluation in Education)

This study investigates the effects of Single-Sex and Co-educational classrooms on English learning outcomes. This study is a causal-comparative study in ex post facto design. The sample is three classes consisting of 73 students (boy and girl-single-sex classes and a co-educational class) from a private secondary school in Central Java, Indonesia. An integrated English test was used, equating the 2013 curriculum and CEFR for English. It tested four skills in English consisting of Listening, Speaking, Reading, and Writing. Expert judgments have already checked the instrument through face validity. Item internal consistency from all skills was good, and the reliability was …

Analysis And Evaluation Of Law Number 12 Of 2012 Concerning Higher Education Based On Sports Needs For Students, Sandey Tantra Paramitha, Muhamad Fahmi Hasan, Leni Anggraeni, Marisa Noviyanti Fajrah Ilsya, Muhamad Gilang Ramadhan, Apriya Maharani Rustandi, Hikmat Kodrat

Jurnal Civics: Media Kajian Kewarganegaraan

The sense of responsibility to educate students as "whole people" which lies on the shoulders of all higher education managers, sports programs will continue to have strategic programs in the higher education system in Indonesia. Therefore, researchers conducted a normative and juridical literature review to examine sports in higher education. The results of this review indicate that Article 35 (3) of the Higher Education Curriculum Law No. 12 of 2012 concerning sports higher education is needed to be used as a compulsory subject in higher education. Overall, this review provides an appropriate reference point for further research by identifying the …

The Effectiveness Of Communication Interdependence Between Teachers, Parents, Assessors, And Entrepreneurs Affecting The Work And Entrepreneurial Skills Of Vocational High School Students, Rosmawaty Hilderiah Pandjaitan, Elena Shinta Maharani Hutajulu

Jurnal Pendidikan Vokasi

This research aims to describe the model, quantity percentage, and factors that affect the effectiveness of communication interdependence between teachers, parents, accessors, and entrepreneurs, affecting vocational high school students' work and entrepreneurial skills (SMKN 7 Tangerang Regency in Industrial Era 4.0). The data analysis method used in this study is used criterion-related validity test in the form of predictive validity, using product-moment correlation technique. This study is quantitative research with a survey method involving 372 respondents from SMKN 7 Tangerang. This study employed Mixing Theory System (Bertalanffy), Theory Open System (Shawn Fanning), and Social System Theory (Nikias Luhmann). Test reliability …

Plan-Do-Review-Share-Happy (Plandoresh) As Strategy To Develop Independent Learning Of Vocational School Students, Aftoni Aftoni, I Wayan Susila, Any Sutiadiningsih, Muhammad Kris Yuan Hidayatulloh

Jurnal Pendidikan Vokasi

When computers take over from routine tasks at work, some employees are involved in independent problem-solving tasks. The current learning system must encourage students to move to lower levels of thinking in order to become independent individuals. The purpose of this study was to test the validity of the Plan-Do-Review-Share-Happy (Plandoresh) strategy as an effort to develop independent learning for vocational school students. This study used a descriptive method, and the aim is to get the validity of the Plandoresh strategy steps with a random sample of 78 respondents. The results that 1.) The Plan step is valid with r …

Implementation Of Electro-Pneumatic Practices Learning Model Based On Troubleshooting To Improve Students' Creativity, Septian Eko Cahyanto, Sudji Munadi

Jurnal Pendidikan Vokasi

This study aimed to develop students' creativity through troubleshooting learning models in practical electro-pneumatic. This study was conducted during the Covid 19 pandemic where learning was carried out online. This troubleshooting practice learning is applied to simulation applications so that it can be a solution in implementing learning that cannot be carried out directly. This study used a quasi-experimental researched method with a controlled group pretest-posttest design pattern. The sample consisted of 60 students majoring in mechanical engineering, State University of Semarang was divided into two classes. The experimental class applies the troubleshooting-based practical learned model, while the controlled class …

The Effect Of External Factors Moderated By Digital Literacy On The Actual Use Of E-Learning During The Covid-19 Pandemic In Islamic Universities In Indonesia, Sumin Sumin, Kahirol Mohd Salleh, Nurdin Nurdin

REID (Research and Evaluation in Education)

The future of education is increasingly worrying due to the impact of the Covid-19 pandemic since the end of 2019. Restrictions on community activities and campus closures have forced university administrators to use e-learning. On the other hand, online learning has encountered many obstacles. Barriers to the use of e-learning are thought to stem from external problems (online facilities and infrastructure) or educators and students (internal factors), such as lack of literacy, low absorption, level of understanding, and other non-technical factors. This study aims to examine further the influence of external factors and digital literacy and the moderating effect of …

Gamification On Chatbot-Based Learning Media: A Review And Challenges, Indra Hidayatulloh, Sigit Pambudi, Herman Dwi Surjono, Totok Sukardiyono

Elinvo (Electronics, Informatics, and Vocational Education)

The mobile learning sector has exploded, implying that the e-Learning trend is shifting to mobile platforms. As a result, chatbots have become increasingly popular alternatives for online learning and examinations on mobile platforms. However, it did not provide enough motivation for the student. On the other hand, gamification in a typical e-Learning platform is a widely used technique for increasing students' learning motivation. Therefore, combining gamification with chatbot-based learning and examinations possibly offer benefits, including increase student learning motivation. This study explored the possibilities and future challenges of the development of gamification within chatbot-based learning media. We discussed four aspects: …

Implementation Of Switching Algorithm For Svpwm Inverter In Induction Motor Drive System On Electric Vehicle Applications, Bayu Praharsena, Mohammad Jauhari, Era Purwanto, Mentari Putri Jati, Angga Wahyu Aditya, Aries Alfian Prasetyo

Elinvo (Electronics, Informatics, and Vocational Education)

Electric cars are the way to reduce global warming and fuel shortages. Performance variable speed drive is needed for various drive electric vehicle applications. Unfortunately, high performance is still being investigated with a variety of drive systems. This paper presents a design, analysis, and implementation of the SV-PWM inverter motor drive system. The SV-PWM algorithm in design using Matlab, to analyze the system include signal response, THD-V, THD-I. All algorithms are embedded in STM32F4, as the main controller. The hardware uses a 3-phase motor control Steval power module. Response speed and output signal inverters are shown in chart form for …