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All Journal Jurnal Akuakultur Indonesia Jurnal Social Economic of Agriculture PRISMA INSPIRAMATIKA Sebatik Media Akuakultur JPMI (Jurnal Pendidikan Matematika Indonesia) KEUDA : JURNAL KAJIAN EKONOMI DAN KEUANGAN DAERAH M A T H L I N E : Jurnal Matematika dan Pendidikan Matematika Imajiner: Jurnal Matematika dan Pendidikan Matematika Proximal: Jurnal Penelitian Matematika dan Pendidikan Matematika Jurnal Ekonomi Pembangunan Jurnal Inovasi Ekonomi Journal of Rural and Urban Community Empowerment International Journal of Social Service and Research Indo-MathEdu Intellectuals Journal Jurnal Agroteknologi Agribisnis dan Akuakultur
Rosyadi, Rosyadi
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Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Energy Environmental Science Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Mathematics Social Sciences Other

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Opportunities and Challenges for Indonesian Merchants in the Serikin Market Ayuni, Hesti Diah; Marcella, Nadya; Gea, Havizal Syahrizen; Kurniasih, Erni Panca; Rosyadi, Rosyadi
Sebatik Vol. 29 No. 1 (2025): June 2025
Publisher : STMIK Widya Cipta Dharma

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46984/sebatik.v29i1.2566

Abstract

Serikin Market, located on the border of Malaysia and Indonesia, is a bustling cross-border trading center with informal sector players. The market offers great opportunities for informal businesses to increase their income and expand their business, thanks to the high shopping interest of local people and tourists who are interested in Indonesian products. However, there are various challenges that informal traders face, such as limited infrastructure and supporting facilities. This study aims to identify and analyze the strengths, weaknesses, opportunities, and threats of the informal sector involved in trading at Serikin Market from Indonesia. As well as, determining the right strategy to optimize the informal sector involved in trading in Serikin Market. The research method used is descriptive qualitative analysis. Data were collected through observation, interviews, and library studies. The technique used is phenomenological analysis. The results showed that before and after the inauguration of the Jagoi Babang Cross Border Post did not change the income earned, only changes in regulation and access. Serikin Market has the power to attract traders and consumers from various countries. The strategic location, uniqueness of local products, competitive prices, and cultural appeal make Serikin Market an ideal place for traders to sell their products. It can provide great opportunities for traders, especially since many consumers from Malaysia are interested in Indonesian products, so the traders can earn a large profit. However, the main drawback faced is the lack of good market management and also faces challenges, such as limited infrastructure. The market is often not equipped with adequate facilities such as a large parking area, proper selling space, and clean public toilets.
Pengembangan Media Pembelajaran BETAMATH untuk Meningkatkan Pemahaman Siswa pada Materi Barisan dan Deret Aritmetika Sriyanti, Linda; Rosyadi, Rosyadi; Taufan, Mochammad
Indo-MathEdu Intellectuals Journal Vol. 6 No. 4 (2025): Indo-MathEdu Intellectuals Journal
Publisher : Lembaga Intelektual Muda (LIM) Maluku

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54373/imeij.v6i4.3582

Abstract

The limited student understanding of arithmetic sequences and series, along with the minimal use of interactive Android-based learning media, served as the foundation for this study. The main objective of this research was to develop and evaluate the effectiveness of an Android-based learning application called BETAMATH in enhancing students' comprehension of the topic. This study employed a Research and Development (R&D) approach, using the 4D development model, which includes the stages of Define, Design, Develop, and Disseminate. The developed product was validated by subject matter experts, media specialists, and pedagogical experts, and was tested on tenth-grade students. Validation results indicated that BETAMATH is suitable for use in the classroom. Practicality testing revealed that the application is easy to use, based on student feedback and teacher observations. The effectiveness of the media was confirmed by a significant improvement in students' understanding, as shown by pretest and posttest results. Therefore, BETAMATH is considered valid, practical, and effective for improving student understanding of arithmetic sequences and series, and holds promise as an innovative alternative to support mathematics instruction in schools.  
PEMANFAATAN FERMENTASI LINDI SAMPAH PERKOTAAN DALAM MEDIA KULTUR TERHADAP BIOMASSA DAN KOMPOSISI KIMIA Chlorella sp. Hadi, Khairul; Rosyadi, Rosyadi
Media Akuakultur Vol 19, No 2 (2024): Desember 2024
Publisher : Politeknik Kelautan dan Perikanan Bone

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15578/ma.19.2.2024.71-79

Abstract

Lindi merupakan cairan yang terbentuk dalam timbunan sampah dan berpotensi sebagai pencemar lingkungan. Namun apabila diolah lindi dapat menjadi sumber unsur hara untuk kultur Chlorella sp.. Penelitian ini dilakukan untuk mengetahui pengaruh lindi dalam media kultur dan mendapatkan konsentrasi lindi terbaik untuk meningkatkan biomassa serta komposisi kimia Chlorella sp.. Penelitian menggunakan rancangan acak lengkap dengan 5 perlakuan, yaitu pemberian lindi 5, 10, 15, 20 dan 25% dan masingmasing perlakuan terdiri dari 3 ulangan. Sebelum digunakan, lindi disaring dan dicampur dengan 20 g gula merah yang dihancurkan, 1 L akuades, 15 mL Effective Microorganism4 (EM4 ), dan kemudian difermentasi selama 1 hari. Kultur dilakukan dalam galon berkapasitas 20 L yang diisi dengan 16 L air tawar, dengan penerangan menggunakan lampu dengan intensitas 2500 lux. Proses kultur berlangsung selama 20 hari, dengan parameter yang diukur meliputi kepadatan sel, biomassa, kandungan proksimat, asam amino, kadar nitrat, fosfat, dan kualitas air (suhu, pH, dan DO). Hasil penelitian menunjukkan pemberian lindi dalam media kultur berpengaruh nyata terhadap biomassa Chlorella sp. (p<0,05) dengan konsentrasi lindi terbaik pada perlakuan 25%, yaitu biomassa sebesar 0,44 ± 0,00 g L-1, mengandung protein 31,208%, lemak 7,125%, karbohidrat 31,217%, kadar air 26,975% dan kadar abu 3,475%. Temuan ini menunjukkan bahwa lindi dapat digunakan sebagai alternatif sumber nutrisi untuk meningkatkan produktivitas Chlorella sp., dengan konsentrasi 25% sebagai yang paling optimal.Leachate is a liquid that forms in landfills and can be an environmental pollutant. However, if the leachate is processed, it can become a source of nutrients for Chlorella sp. culture. This research was conducted to determine the effect of leachate in the culture medium and to obtain the best leachate concentration to increase the biomass and chemical composition of Chlorella sp.. The research used a completely randomized design with five treatments, namely the addition of 5%, 10%, 15%, 20%, and 25% leachate, with each treatment consisting of three replications. Before use, the leachate was filtered and mixed with 20 g of crushed brown sugar, 1 L of distilled water, 15 mL of Effective Microorganism 4 (EM4 ), and then fermented for 1 day. The culture was conducted in a 20 L gallon filled with 16 L of freshwater, illuminated with a light intensity of 2500 lux. The culturing process lasted for 20 days, with parameters measured including cell density, biomass, proximate content, amino acids, nitrate, phosphate, and water quality (temperature, pH, and DO). The results showed that the addition of leachate in the culture media had a significant effect on the biomass of Chlorella sp. (p<0.05), with the best leachate concentration being 25%, yielding a biomass of 0.44±0.00 g L-1 , containing 31.208 % protein, 7.125 % lipid, 31.217 % carbohydrates, 26.975 % moisture content, and 3.475% ash content. These findings indicate that leachate can be used as an alternative nutrient source to enhance the productivity of Chlorella sp., with a 25% concentration being the most optimal
Desain Pembelajaran Materi Transformasi Geometri dengan Model Problem Based Learning Terhadap Pemahaman Konsep Dilatasi Oktaviana, Tia; Gunadi, Farid; Rosyadi, Rosyadi; Trapsilawati, Endah
Imajiner: Jurnal Matematika dan Pendidikan Matematika Vol 7, No 4 (2025): Imajiner: Jurnal Matematika dan Pendidikan Matematika
Publisher : Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/imajiner.v7i4.22710

Abstract

Penelitian ini secara umum bertujuan untuk mendesain materi pembelajaran Dilatasi dengan model Problem Based Learning terhadap pemahaman konsep. Tujuan khususnya adalah mendesain pembelajaran mengenai dilatasi yang layak, praktis, dan efektif. Penelitian ini menggunakan model pengembangan 4D ( Define, Design, Develop , dan Disseminate ). Pada tahap Define , dilakukan analisis kebutuhan melalui observasi dan wawancara dengan siswa, guru, dan wakil kepala sekolah untuk mengidentifikasi kendala pembelajaran. Tahap Desain meliputi perancangan modul ajar, LKPD, serta perangkat asesmen berbasis PBL. Selanjutnya pada tahap Develop , dilakukan uji kelayakan oleh ahli media, materi, dan pedagogi, serta uji kepraktisan melalui implementasi di kelas dan uji efektivitas menggunakan tes pemahaman konsep. Hasil penelitian ini menunjukkan bahwa desain pembelajaran yang dikembangkan dinyatakan layak berdasarkan hasil validasi ahli, praktis berdasarkan respon siswa dan observasi guru dengan persentase sebesar 97%, serta efektif dalam meningkatkan pemahaman konsep dilatasi berdasarkan hasil post-test dengan nilai signifikan (sig. 0,05). Modul ajar ini juga telah didistribusikan melalui platform yang berani untuk dimanfaatkan secara lebih luas. Berdasarkan hasil penelitian disimpulkan pengembangan modul ajar matematika layak dan praktis digunakan pada materi pembelajaran Dilatasi, dan efektif terhadap kemampuan pemahaman konsep.
Problem Based Learning Design Based on Culturally Responsive Teaching for Understanding the Concept of Opportunity Drajat, Widi Rahmawati; Gunandi, Farid; Rosyadi, Rosyadi; Komariah, Komariah
JPMI (Jurnal Pendidikan Matematika Indonesia) Vol 10, No 2 (2025): Volume 10 Number 2, September 2025
Publisher : STKIP Singkawang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26737/jpmi.v10i2.6906

Abstract

This study aims to develop a mathematics learning design that integrates Problem-Based Learning (PBL) with the Culturally Responsive Teaching (CRT) approach to improve the understanding of probability among Grade XII SMK students. The background of this study is the problem of low student understanding of probability material caused by minimal mathematical reasoning skills, low motivation to learn, and the dominance of conventional methods such as lectures and practice questions. Students also have difficulty solving contextual problems and applying enumeration rules. The CRT approach is considered to make learning more relevant because it links the material to the student's cultural background, while PBL encourages active participation and the development of critical thinking skills through solving real problems. The research method used is the 4D development model, which consists of the Define, Design, Develop, and Disseminate stages. In the Define stage, a needs analysis is conducted through teacher interviews to determine the challenges and readiness to implement PBL-CRT-based learning. The design stage produces a prototype of the learning design, teaching modules, and evaluation tools. The development phase includes a feasibility test by experts, a practical test in the classroom, and an effectiveness test by analyzing students' interests and learning outcomes. The results of the feasibility test showed that the module was feasible to use (Asymp. Sig = 0.004 <0.05), the practicality test obtained a score of 4 and 5 out of 97%, and the effectiveness test showed that the module significantly increased learning interest (Sig. = 0.01 <0.05). The dissemination phase was carried out by distributing the learning products online through the website. The results of the study showed that the learning design combining PBL and CRT can significantly improve students' understanding of mathematical concepts and create a learning atmosphere.Desain Pembelajaran Problem Based Learning Berbasis Culturally Responsive Teaching terhadap Pemahaman Konsep PeluangABSTRAKPenelitian ini bertujuan untuk mengembangkan desain pembelajaran matematika yang mengintegrasikan Problem Based Learning (PBL) dengan pendekatan Culturally Responsive Teaching (CRT) guna meningkatkan pemahaman konsep peluang pada siswa kelas XII SMK. Latar belakang penelitian ini adalah rendahnya pemahaman siswa terhadap peluang materi, yang disebabkan oleh minimnya keterampilan penalaran matematis, rendahnya motivasi belajar, serta dominasi metode konvensional seperti ceramah dan latihan soal. Siswa juga kesulitan dalam menyelesaikan soal kontekstual dan menerapkan kaidah pencacahan. Pendekatan CRT dinilai mampu menjadikan pembelajaran lebih relevan karena materi terkait dengan latar belakang siswa, sementara PBL mendorong keterlibatan aktif dan pengembangan kemampuan berpikir kritis melalui pemecahan masalah nyata. Metode penelitian yang digunakan adalah model pengembangan 4D, yang terdiri atas tahapan Define, Design, Develop, dan Disseminate. Pada tahap Define, dilakukan analisis kebutuhan melalui wawancara dengan guru untuk mengetahui tantangan dan kesiapan penerapan pembelajaran berbasis PBL-CRT. Tahap Desain menghasilkan prototipe rencana pembelajaran, modul terbuka, dan instrumen evaluasi. Tahap Pengembangan meliputi uji kelayakan oleh para ahli, uji kepraktisan di kelas, serta uji efektivitas melalui analisis minat dan hasil belajar siswa. Hasil uji kelayakan menunjukkan modul layak digunakan (Asymp.Sig = 0.004 < 0.05), uji kepraktisan memperoleh skor 4 dan 5 sebesar 97%, dan uji efektivitas menunjukkan bahwa modul meningkatkan minat belajar secara signifikan (Sig. = 0.01 < 0.05). Tahap Disseminate dilakukan melalui penyebaran produk pembelajaran secara berani melalui website. Hasil penelitian menunjukkan bahwa desain pembelajaran yang menggabungkan PBL dan CRT mampu meningkatkan pemahaman konsep matematika siswa secara signifikan, serta menciptakan suasana belajar yang lebih inklusif, kontekstual, dan relevan dengan pengalaman serta budaya siswaKata Kunci :problem based learning; culturally responsive teaching; peluang; desain pembelajaran; pemahaman konsep
Co-Authors Agusnimar, Agusnimar Amoni, Riri Ayuni, Hesti Diah Dartana, Dartana dedy dedy, dedy Drajat, Widi Rahmawati Dwi Cahya, Fihlia Erni Panca Kurniasih Gea, Havizal Syahrizen Gunadi, Farid Gunandi, Farid Hasibuan, Afap Hery Widijanto Jarod Setiaji Khairul Hadi Khairul Hadi Khofifah Khofifah Komariah Komariah Marcella, Nadya Mulyana, Diki Nandang Nurafifah, Luthfiyati Oktaviana, Tia Prislyawan, Prima Febria Rasidi, Abdul Fatah Restiatun, Restiatun Riyanti Riyanti Runisah, Runisah Sindy Sindy Sri Hartini Sriyanti, Linda Sudirman Sudirman Sugeng, Santoso Sulhaswardi, Sulhaswardi Syahputra, M. Reza Taufan, Mochammad Trapsilawati, Endah Udi, Kurniawan Yacoub, Yarlina