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PENGARUH MODEL PEMBELAJARAN JUCAMA TERHADAP KEMAMPUAN PEMECAHAN MASALAH SISWA KELAS IX MTSN 02 TAKENGON umar, ali
Math Educa Journal Vol 4, No 1 (2020)
Publisher : Universitas Islam Negeri Imam Bonjol Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15548/mej.v4i1.1239

This study supports 1). Knowing the differences in problem-solving abilities in students before and after being taught with the JUCAMA learning model; 2). Knowing students' problem solving skills between before and after being taught with the JUCAMA learning model in high initial students; 3). Knowing students' problem solving skills between before and after being taught with the JUCAMA learning model in students with low initial ability; 4). Conversation between initial ability and learning model on students' problem solving. This study uses quantitative research with a quasi-experimental type of research. The results showed 1). 95% (16.67> 9.98, tcount = 7.816> t table = 1.71; 2). The average problem solving ability of students in early ability students was higher after being taught with the JUCAMA learning model than before at 95% confidence level (16.09> 13.72, tcount = 15.53> ttable = 1.81); 3. The average problem solving ability of students in early ability students is lower after being taught with the JUCAMA learning model than before at 95% confidence level (10.31> 7.25, tcount = 5.21> ttable = 1.75). While the results of the interaction test showed there was no interaction between the initial ability and the learning model on the ability to solve students' problems at a 95% confidence level (Fcount = 0.29 <Ftable = 1.35), so that the JUCAMA learning model was suitable for use with diverse abilities . Based on the research it was also found that students needed more time than usual to solve problems of type solving problems.

ANALISIS KEMAMPUAN CALON GURU MATEMATIKA DALAM MEMBUAT SOAL PEMECAHAN MASALAH MATEMATIKA Umar, Ali; Lubis, Nur Ainun; Ahmad, Nurul Qomariyah; Saputra, Edy; Nasution, Mustafa Kamal
Math Educa Journal Vol 5, No 1 (2021)
Publisher : Universitas Islam Negeri Imam Bonjol Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15548/mej.v5i1.2508

Problem solving is the main focus in learning mathematics at the primary and secondary school level. Prospective teachers must be prepared as well as possible as problem solvers and problem solving instructors. The purpose of this study was to describe the prospective teacher's ability to make a problem solving question based on category of good mathematical problem solving questions. The type of research used is descriptive qualitative.The research subjects were students of semester VI of the 2019/2020 academic year of the IAIN Takengon Mathematics Education Study Program. Based on the research results, it shows that the subjects in general already understood the theory of problem solving , but this understanding did not always directly proportional to the ability to make a mathematical problem solving question.

Pneumatic pressure control system with microcontroller on bullet tower Umar, Ali; Rezwandi, Fiqri Aqilah; Rohman, Hamzah Nur; Prasasti, Anggunmeka Luhur; Tresna, Wildan Panji
CEPAT Journal of Computer Engineering: Progress, Application and Technology Vol 4 No 01 (2025): May 2025
Publisher : Universitas Telkom

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25124/cepat.v2i04.6472

A bullet launcher is a defense tool intended to shoot targets, powered by gunpowder that can endanger its users. The use of gunpowder is dangerous because the resulting explosive power can harm the user. An alternative solution that can be done for this problem is to design a bullet launcher system that does not endanger its users. the system that has been implemented is a pneumatically powered bullet launcher. The pneumatic system is controlled using a microcontroller to control the input of sensors, solenoids, actuators and air pressure in the system. The pressure sensor used is a WPT-83G-EGG4 transmitter with a maximum pressure of 12 bar or 174 psi. The test results obtained with the average pressure measurement error is ±1% tolerance at pressures below 33 psi. The average response time of the sensor detecting pressure is 0.2 seconds.

Analisis Kesulitan Soal Pemecahan Masalah Pada Buku Sekolah Elektronik (BSE) Pelajaran Matematika Kurikulum 2013 revisi 2017 Rahayu, Yulia; Umar, Ali; Harapan, Rosliana
Jurnal Basicedu Vol. 5 No. 2 (2021)
Publisher : Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/basicedu.v5i2.694

This study aims to analyze and describe the level of difficulty of solving mathematical problems in terms of the components of the problem: type of problem, type of number, type of operation, many operations, many questions, sufficiency of data, and similarity with previous questions and difficulty level of problem solving questions in the Electronic School Book (BSE) Mathematics for Senior High School (SMA) class X 2013 curriculum revision of 2017. This research uses literature review or literature study with a descriptive qualitative approach. Data collection methods used were the determination of mathematics teaching materials/textbooks; determination of problem-solving items contained in the competency test. The data analysis technique uses the stages of data reduction, data presentation, and conclusion. The results showed: 1) There are 18% problem solving questions or 20 questions out of 109 total questions; 2) Type of problem solving 55% routine and 45% nonroutine; 2) the dominant number type of whole number is 60%; 3) More types of operations use multiplication operations as much as 90%; 4) Many dominant operations use more than one operation as much as 100%; 5) Many dominant questions use one question as much as 70%; 6) Has sufficient complete data as much as 75%; 7) As many as 60% of the questions were not similar to the previous questions. So that the problem solving questions in the School Electronic Book (BSE) class X SMA are categorized as having an Easy difficulty level.

Improving Skills Through Training in Freshwater Fish Farming and Crystal Guava Jam Production (Bantarjaya Village, Bogor Regency, West Java) Umar, Ali; Risdiyanto, Idung; Albarkah, Anita Maharani; Aziz, Maulana; Bagaskara, Muhammad Fajar
Jurnal Pengabdian kepada Masyarakat (Indonesian Journal of Community Engagement) Vol 10, No 1 (2024): March
Publisher : Direktorat Pengabdian kepada Masyarakat Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jpkm.88148

Fish farming is a type of fishing that involves cultivating various fish on land. Fish farming success can be influenced by site characteristics, water quality, fish suitability, and care. Crystal guava processing is a production utilization innovation. This has the potential to raise the value of crystal guava commodities, which can be consumed directly but are also processed into various derivative products. The community groups will be divided into two foster groups: the MSME group that makes crystal guava jam and the foster group that grows fish in irrigation ponds. This empowerment approach involves the creation of supporting infrastructure such as ponds in irrigation canals and the production of crystal guava jam. Then, using the t-test on the dependent mean and Principal Component Analysis, integrated training was carried out, including socializing and field practice, to quantify statistical development in abilities. As a result, the target community's understanding has increased. The target group (community) can increase their abilities in fish cultivation, the production of novel products (commodity derivatives), and marketing across various phases with the creation of supporting infrastructure.

Analisis Kesalahan Siswa Dalam Menyelesaikan Soal Literasi Matematika Berdasarkan Prosedur Newman Umar, Ali; Sartika, Lenis Ayu
Malewa: Journal of Multidisciplinary Educational Research Vol 1 No 2 (2023): MALEWA: Journal of Multidisciplinary Educational Research
Publisher : Yayasan Dharma Lentera Khatulistiwa (MALEWA)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61683/jome.v1i02.64

This research aimed to analyze students' mathematical literacy using the Newman's procedure. The research method employed qualitative descriptive. The research subjects were three students with high, medium, and low abilities in a Junior Hight School in Aceh Tengah Regency. The research findings indicated that, by using Newman's procedure, students with high, medium, and low abilities demonstrated similar skills in the aspects of reading and understanding problems. However, in the aspects of transformation, process skills, and writing final answers, differences in abilities were observed among students with high, medium, and low abilities.

EFFECT OF MAGNETITE AND CHITOSAN-MAGNETITE ADDITION ON BACTERIAL LEVELS AND NH3-N (FREE-LIVING N2-FIXING BACTERIA CULTURE) Umar, Ali; Saprudin, Deden; Hazra, Fahrizal
Jurnal Kimia Riset Vol. 8 No. 2 (2023): December
Publisher : Universitas Airlangga, Campus C Mulyorejo, Surabaya, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/jkr.v8i2.47647

Free-living N2-fixing bacteria are essential in the soil because they provide a source of nitrogen in the form of ammonium needed by plants to be used in building protein blocks. The fixation of free N2 needs to be increased by adding nanomaterials such as magnetite (Fe3O4), which has an active group and can be a source of nitrogenase enzyme cofactor. In this study, increased N2 fixation used N2-fixing bacteria in Burks medium. This increase was determined by measuring NH3 levels using the Phenate method formed after Burks medium was treated with Fe3O4 and chitosan-magnetite (CS-Fe3O4). The study found that the number of bacteria can be well decreased. This research showed that using Fe3O4 and CS-Fe3O4 increased NH3-N levels in cultures of free-living nitrogen-fixing bacteria by 15.40% and 75.54%. For future development, it can be in the form of optimization, the effect of adding the same material to plant secondary metabolites, and the mechanism of bacteria in using the material.

Analisis Kesulitan Soal Pemecahan Masalah Pada Buku Sekolah Elektronik (BSE) Pelajaran Matematika Kurikulum 2013 revisi 2017 Rahayu, Yulia; Umar, Ali; Harapan, Rosliana
Jurnal Basicedu Vol. 5 No. 2 (2021)
Publisher : Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/basicedu.v5i2.694

This study aims to analyze and describe the level of difficulty of solving mathematical problems in terms of the components of the problem: type of problem, type of number, type of operation, many operations, many questions, sufficiency of data, and similarity with previous questions and difficulty level of problem solving questions in the Electronic School Book (BSE) Mathematics for Senior High School (SMA) class X 2013 curriculum revision of 2017. This research uses literature review or literature study with a descriptive qualitative approach. Data collection methods used were the determination of mathematics teaching materials/textbooks; determination of problem-solving items contained in the competency test. The data analysis technique uses the stages of data reduction, data presentation, and conclusion. The results showed: 1) There are 18% problem solving questions or 20 questions out of 109 total questions; 2) Type of problem solving 55% routine and 45% nonroutine; 2) the dominant number type of whole number is 60%; 3) More types of operations use multiplication operations as much as 90%; 4) Many dominant operations use more than one operation as much as 100%; 5) Many dominant questions use one question as much as 70%; 6) Has sufficient complete data as much as 75%; 7) As many as 60% of the questions were not similar to the previous questions. So that the problem solving questions in the School Electronic Book (BSE) class X SMA are categorized as having an Easy difficulty level.

Bahasa Matematis Masyarakat Suku Gayo Umar, Ali; Ainun Lubis, Nur
Jumper: Journal of Educational Multidisciplinary Research Vol 2 No 1 (2023): Jumper: Journal of Educational Multidisciplinary Research
Publisher : LSM Catimore dan Sahabat Jl. Paya Ilang/Pertamina Desa Lemah Burbana, Takengon, Aceh Tengah 24552

Beberapa penelitian mengemukakan bahasa Gayo mulai terancam punah yang disebabkan oleh berkurangnya penutur dan tergantikan dengan bahasa lain yang cakupannya lebih luas. Salah satu usaha yang bisa dilakukan adalah dengan memberikan posisi lebih besar pada bahasa Gayo dalam pembelajaran di dalam kelas. Tujuan penelitian ini adalah untuk mengeksplorasi istilah-istilah dalam bahasa Gayo yang berhubungan dengan matematika. Penelitian ini menggunakan pendekatan etnografi dengan sumber data didapatkan dari wawancara, observasi lapangan, dokumentasi dan studi pustaka. Hasil penelitian ditemukan banyak istilah bahasa Gayo yang berhubungan dengan matematika meliputi penyebutan bilangan, satuan luas, satuan volume, satuan waktu dan satuan-satuan tak tentu lainnya. Temuan ini bisa digunakan dalam pembelajaran di dalam kelas sebagai salah satu usaha dalam melestarikan bahasa Gayo

Kolaborasi Mahasiswa dalam Model Pembelajaran Kooperatif Tipe STAD (Student Achievement Divison) Umar, Ali; B, Firmansyah
Jumper: Journal of Educational Multidisciplinary Research Vol 2 No 2 (2023): Jumper: Journal of Educational Multidisciplinary Research
Publisher : LSM Catimore dan Sahabat Jl. Paya Ilang/Pertamina Desa Lemah Burbana, Takengon, Aceh Tengah 24552

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56921/jumper.v2i2.133

The purpose of this research is to describe the collaboration among students during the group work stage in the STAD(Student achievement Divison) cooperative learning model. The research method used descriptive qualitative. The research subjects are four students grouped based on their initial abilities. One student with high initial ability (Mt), two students with moderate initial ability (Ms), and one student with low initial ability (Mr). The research instruments used observation, interviews, and documentation. Data analysis follows the Miles & Huberman (1994) model, which consists of three stages: data reduction, data presentation, and drawing conclusions. The research findings reveal that Mt indirectly took over the discussion leadership without needing approval from other members, assumed more responsibility and a larger portion of tasks compared to other members, demonstrated dominance in presenting ideas, effectively communicated with group members, and explains ideas to other group members. On the other hand, Ms showed willingness to participate, effectively presented ideas but required approval, especially from Mt, and is more democratic and flexible in completing tasks. Meanwhile, Mr displayed reluctance to participate, passivity, hesitation in presenting ideas, and a willingness to accept other members' ideas without critiquing them beforehand.

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