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Hedi, Hedi
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PENGEMBANGAN MODUL MENGGUNAKAN APLIKASI SIGIL PADA MATERI PASAR MODAL DI SMA NEGERI 1 WANGI-WANGI Hedi, Hedi; Rizal, Rizal; Ilham, Muhammad
Jurnal Online Program Studi Pendidikan Ekonomi Vol 6, No 4 (2021): Jurnal Online Program Studi Pendidikan Ekonomi
Publisher : Universitas Halu Oleo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36709/jopspe.v6i4.22884

Abstract

Penelitian ini bertujuan untuk: 1) Mengembanggkan modul menggunakan aplikasi sigil pada materi pasar modal, 2) Mengetahui respon siswa terhadap modul menggunakan aplikasi sigil pada materi pasar modul. Penelitian ini menggunakan adaptasi model pengembangan 4D.Instrumen yang di gunakan dalam pengambilan data dalam peneltian ini adalah wawancara dan angket.Teknik analisis data dalam penelitian ini menggunakan pendekatan kualitatif dan kuantitatif. Hasil dari penelitian ini ialah: 1) Hasil penilaian dari ahli materi 1 untuk modul pembelajaran menggunakan aplikasi Sigil tersebut mendapatkan rerata skor sebesar 84,00% dalam kategori sangat baik, hasil penilaian dari ahli materi 2 mendapatkan rerata skor sebesar 81,58% dalam kategori sangat baik, hasil penilaian dari ahli materi 3 mendapatkan rerata skor sebesar 77,63% dalam kategori baik. Hasil penilaian dari ahli media 1 untuk modul pembelajaran menggunakan aplikasi Sigil tersebut mendapatkan rerata skor sebesar 77,28% dalam kategori baik, hasil penilaian dari ahli media 2 mendapatkan rerata skor 80,56% dalam kategori sangat baik, hasil penilaian dari ahli media 3 mendapatkan rerata skor sebesar 84,72% dalam kategori sangat baik. Hasil penilaian dari uji coba kelompok pertama untuk modul pembelajaran menggunakan aplikasi Sigil tersebut mendapatkan rerata skor 87,21% dalam kategori sangat baik.  Hasil penilaian dari uji coba Kelompok kedua untuk modul pembelajaran menggunakan aplikasi Sigil tersebut mendapatkan rerata skor sebesar 88,71% dalam kategori sangat baik. Berdasarkan data tersebut dapat disimpulkan bahwa modul menggunakan aplikasi Sigil dinyatakan sangat layak untuk digunakan dalam pembelajaran
Analisis Kenyamanan Berdasarkan Aspek Termal Pada Ruang Pamer Bangunan Bersejarah Oktantiningrum, Gita Almira; Surjanto, Ary; Prasetyo, Bowo Yuli; Hedi, Hedi
Prosiding Industrial Research Workshop and National Seminar Vol. 14 No. 1 (2023): Vol 14 (2023): Prosiding 14th Industrial Research Workshop and National Semina
Publisher : Politeknik Negeri Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/irwns.v14i1.5374

Abstract

Museum Gedung Sate dan Museum Pos Indonesia merupakan destinasi sejarah yang berada di Kota Bandung, sehingga kenyamanan termal pada kedua museum perlu diperhatikan agar pengunjung merasa nyaman ketika berada di dalamnya. Tingkat kenyamanan termal di Museum Gedung Sate dan Museum Pos Indonesia dapat diketahui melalui SNI 03-6572-2001 dan standar ASHRAE 55 (2017). Data kuantitatif diperoleh dari pengukuran di lapangan dengan durasi 3 menit menggunakan alat 5 in 1 environment meter dan hot wire anemometer. Sementara data kualitatif diperoleh melalui penyebaran kuesioner. Hasil penelitian ini menunjukkan bahwa temperatur udara, kelembaban udara, dan kecepatan udara untuk kedua museum sudah memenuhi SNI 03-6572-2001, sehingga berdasarkan SNI kedua museum dikatakan nyaman. Namun, pada standar ASHRAE 55 (2017) kelembaban udara tidak terpenuhi. Nilai PMV yang terukur berkisar -1,61 hingga 0,48 dengan nilai PPD 5% hingga 57% untuk Museum Gedung Sate dan pada Museum Pos Indonesia nilai PMV berkisar -0,02 hingga 1,07 dengan nilai PPD 5% - 29%. Namun, pada Museum Gedung Sate nilai PPD yang melebihi 10% sebanyak 78% dengan hasil kuesioner hanya 12% responden merasa kurang nyaman. Sementara pada Museum Pos Indonesia indeks PPD yang melebihi 10% sebanyak 38% dengan hasil kuesioner menyatakan bahwa 34% responden merasa kurang nyaman.
Analisis Kenyamanan Berbasis Termal Pada Ruang Baca Perpustakaan Cetta, Elang Mahidara; Surjanto, Ary; Arman, Muhammad; Hedi, Hedi
Prosiding Industrial Research Workshop and National Seminar Vol. 14 No. 1 (2023): Vol 14 (2023): Prosiding 14th Industrial Research Workshop and National Semina
Publisher : Politeknik Negeri Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/irwns.v14i1.5379

Abstract

Penelitian ini bertujuan untuk menganalisis kenyamanan berdasarkan aspek termal di Ruang Baca Gedung Perpustakaan Politeknik Negeri Bandung (Polban) dan Universitas Pendidikan Indonesia (UPI). Standar baku yang digunakan adalah ASHRAE 55- 2017, SNI 03-6572-2001. Beberapa variabel yang diukur meliputi temperatur udara, kelembapan udara, kecepatan angin, dan perhitungan temperatur radiasi matahari rerata sebagai variabel kuantitatif. Sedangkan variabel kualitatif yaitu aktivitas (met) dan insulasi pakaian (clo). Sensasi kenyamanan direpresentasikan dalam sebuah kata verbal yang merujuk dalam 7 skala yaitu dingin, sejuk, agak sejuk, normal, agak hangat, hangat dan panas. PMV (Predicted Mean Vote) mempunyai rentang skala dari -3 sampai +3 sementara 0 adalah kondisi normal/netral. Pengambilan data dilaksanakan di Ruang Baca Perpustakaan Polban dan UPI sebanyak 39 dan 36 titik ukur dan dilakukan 7 kali. Setiap titik ukur diberikan rentang selama 3 menit. Berdasarkan hasil pengukuran rata-rata di Ruang Baca Perpustakaan Polban dan UPI didapatkan hasil temperatur udara 25,6 ºC dan 26,7 ºC, kelembapan udara 75,7% dan 75%, kecepatan angin 0,13 m/det dan 0,12 m/det, lalu perhitungan temperatur radiasi matahari 27,1 ºC dan 27,8 ºC. Dari hasil sebaran kuesioner ke responden menunjukan bahwa nilai PPD (Predicted Percentage of Dissatisfied) di Ruang Baca Perpustakaan Polban dan UPI didapatkan nilai 55% dan 80%. Artinya bahwa ruang baca di perpustakaan Polban dan UPI belum memenuhi standar kenyamanan termal dikarenakan tingkat PPD yang tinggi. Hasil analisis statistik menggunakan IBM SPSS dengan metode Independent Samples U- Test (Mann-Whitney Test) didapatkan nilai Asymp.sig (2-tailed) = 0,203 dan nilai p-value yang cukup besar dari tingkat signifikan yang ditetapkan yakni 0,05. Dari nilai Asymp.sig = 0,203, dapat disimpulkan bahwa Ruang Baca Perpustakaan Polban dan UPI tidak memiliki perbedaan yang signifikan.
The development of two-variable function derivative learning using Geogebra Hedi, Hedi; Mulyadi, Ahmad Deni; Suryani, Anny; Binarto, Agus; Agoes, Farida
International Journal of Trends in Mathematics Education Research Vol 6, No 3 (2023)
Publisher : SAINTIS Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33122/ijtmer.v6i3.233

Abstract

Mathematics learning model using GeoGebra software has become a handy tool in teaching mathematical concepts and applications. Students can conduct experiments and explore mathematical concepts in an interactive and fun way with GeoGebra software. Using GeoGebra in learning mathematics of two-variable functions can increase students' understanding on the topic discussed, strengthen mathematical computational and visualization skills, and motivate them to know more and better complex mathematical concepts. From this perspective, this study aims to know the impact of using GeoGebra on students' understanding of the derivative of a function of two variables. Furthermore, this study was conducted on two groups of students, namely the control group (not using GeoGebra) of 53 students and the experimental group (using GeoGebra) consisting of 50 students. Based on these results descriptively students in the experimental group have higher scores on the assessment of skills in determining partial derivatives and their application. Statistically, there is a difference between the experimental and control groups in understanding the function of the derivative of the two variables.
Pengaruh Pencampuran Metanol dalam Bahan Bakar Pertalite Terhadap Performa Mesin Sepeda Motor Syamsul Maarif; Hedi, Hedi; Sri Widarti
JURNAL SURYA TEKNIKA Vol. 11 No. 1 (2024): JURNAL SURYA TEKNIKA
Publisher : Fakultas Teknik UMRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37859/jst.v11i1.7315

Abstract

The purpose of this research is to study the effect of mixing pertalite fuel with methanol on torque, power, and fuel consumption, as well as to study the effect of mixing pertalite fuel with methanol on vehicle exhaust emissions and determine the mixture of pertalite and methanol that produces the best engine performance. Fuel variations pertalite, pertalite methanol 5% (M5), pertalite methanol 10% (M10), pertalite methanol 15% (M15), pertalite methanol 20% (M20). This test is carried out with dynotest testing which aims to determine the value of torque and power. Fuel consumption testing was carried out using the road test method, while testing exhaust emissions using Gaz Analyzer. In testing using dynotest, it can be seen that the addition of methanol makes the torque value produced greater, the highest torque value is produced by M20 fuel which is 22.37 Nm. The highest power value is produced by M20 fuel, which is 13.2 Hp. The results of fuel consumption testing with the road test method using pertalite, M5, M10, M15, M20 fuels with the same amount of fuel, namely 250 ml, show that M20 fuel produces the least fuel consumption value of 0.018 l/km with the longest mileage compared to other fuels, namely 13.2 km. The results of HC, CO and CO₂ exhaust emissions testing show that M20 fuel produces the least HC, CO and CO₂ exhaust emissions compared to other fuels.
VISUALISASI PENGAJARAN MATEMATIKA SMA DENGAN GEOGEBRA Hedi, Hedi; Yuliyawati, Sri Nur; Hazma, Hazma; Suryani, Anny; Mulyadi, Ahmad Deni
BUDIMAS : JURNAL PENGABDIAN MASYARAKAT Vol 6, No 3 (2024): BUDIMAS : Jurnal Pengabdian Masyarakat
Publisher : LPPM ITB AAS Indonesia Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29040/budimas.v6i3.15239

Abstract

In the teaching process, teachers are expected to be creative and innovative in delivering the subject matter of teaching. One of the methods that can be used is visualizing mathematics teaching using GeoGebra software. However, many teachers need help understanding how to use this software. Therefore, training is needed to visualize mathematical concepts to help teachers teach mathematics in their classes. Mathematics teaching can be visualized with the help of GeoGebra so that it can improve student understanding. With this media, concepts, formula derivations, problem-solving, and their applications can be visualized more clearly. This makes mathematics teaching more explorative because students can directly observe the relationship between analytical and visual representations of a concept and the relationship between mathematical concepts. From this activity, partner teachers benefit from increasing their ability to use GeoGebra software to support the teaching and learning process (KBM). The implementation of this training is in three steps. The first step is the formulation of a tutorial module for visualizing mathematics teaching using GeoGebra. The second step is the implementation of training activities which include pretests, explanations of the subject matter, and practices for visualizing mathematics teaching with GeoGebra. The third step is the final evaluation (posttest). At the end of the training, almost all participants mastered the training topics and only a small number had not mastered it. So, it was concluded that the competence of visualizing mathematics teaching with GeoGebra of partner teachers who attended the training increased. This competence greatly supports the implementation of mathematics teaching in the classroom and makes students more enthusiastic.
VISUALISASI PENGAJARAN MATEMATIKA SMA DENGAN GEOGEBRA Hedi, Hedi; Yuliyawati, Sri Nur; Hazma, Hazma; Suryani, Anny; Mulyadi, Ahmad Deni
BUDIMAS : JURNAL PENGABDIAN MASYARAKAT Vol. 6 No. 3 (2024): BUDIMAS : Jurnal Pengabdian Masyarakat
Publisher : LPPM ITB AAS Indonesia Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

In the teaching process, teachers are expected to be creative and innovative in delivering the subject matter of teaching. One of the methods that can be used is visualizing mathematics teaching using GeoGebra software. However, many teachers need help understanding how to use this software. Therefore, training is needed to visualize mathematical concepts to help teachers teach mathematics in their classes. Mathematics teaching can be visualized with the help of GeoGebra so that it can improve student understanding. With this media, concepts, formula derivations, problem-solving, and their applications can be visualized more clearly. This makes mathematics teaching more explorative because students can directly observe the relationship between analytical and visual representations of a concept and the relationship between mathematical concepts. From this activity, partner teachers benefit from increasing their ability to use GeoGebra software to support the teaching and learning process (KBM). The implementation of this training is in three steps. The first step is the formulation of a tutorial module for visualizing mathematics teaching using GeoGebra. The second step is the implementation of training activities which include pretests, explanations of the subject matter, and practices for visualizing mathematics teaching with GeoGebra. The third step is the final evaluation (posttest). At the end of the training, almost all participants mastered the training topics and only a small number had not mastered it. So, it was concluded that the competence of visualizing mathematics teaching with GeoGebra of partner teachers who attended the training increased. This competence greatly supports the implementation of mathematics teaching in the classroom and makes students more enthusiastic.
Bellman-Ford Algorithm for Optimizing Drinking Water Distribution by Perumda Air Minum Tirta Raharja in Cicalengka Lusiani, Anie; Sartika, Euis; Nuryati, Neneng; Hedi, Hedi
KUBIK Vol 10 No 2 (2025): IN PRESS
Publisher : Jurusan Matematika, Fakultas Sains dan Teknologi, UIN Sunan Gunung Djati Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Access to clean water in Cicalengka District, Bandung Regency, remains limited, with current coverage reaching only 5.08% of the population. Perumda Air Minum Tirta Raharja has set a target to expand drinking water service to 44% by 2030. To support this goal, this study investigates the optimization of the water distribution pipe network in Cicalengka. The research applies the Bellman-Ford algorithm to model the distribution network as a weighted, undirected, and connected graph, where customer houses are represented as vertices, pipe connections as edges, and pipe lengths as weights. Using data from the existing network and customer locations, the algorithm was implemented to identify optimal distribution paths. The results yielded two shortest path alternatives between the specified source and destination nodes. These findings demonstrate the potential of graph-based optimization in improving distribution planning and can serve as a reference for the development and management of future water supply infrastructure.
Bellman-Ford Algorithm for Optimizing Drinking Water Distribution by Perumda Air Minum Tirta Raharja in Cicalengka Lusiani, Anie; Sartika, Euis; Nuryati, Neneng; Hedi, Hedi
KUBIK Vol 10 No 2 (2025): IN PRESS
Publisher : Jurusan Matematika, Fakultas Sains dan Teknologi, UIN Sunan Gunung Djati Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Access to clean water in Cicalengka District, Bandung Regency, remains limited, with current coverage reaching only 5.08% of the population. Perumda Air Minum Tirta Raharja has set a target to expand drinking water service to 44% by 2030. To support this goal, this study investigates the optimization of the water distribution pipe network in Cicalengka. The research applies the Bellman-Ford algorithm to model the distribution network as a weighted, undirected, and connected graph, where customer houses are represented as vertices, pipe connections as edges, and pipe lengths as weights. Using data from the existing network and customer locations, the algorithm was implemented to identify optimal distribution paths. The results yielded two shortest path alternatives between the specified source and destination nodes. These findings demonstrate the potential of graph-based optimization in improving distribution planning and can serve as a reference for the development and management of future water supply infrastructure.
Co-Authors Agoes, Farida Ary Surjanto Binarto, Agus Cetta, Elang Mahidara Hazma, Hazma Lusiani, Anie Muhammad Arman Muhammad Ilham Mulyadi, Ahmad Deni Nuryati, Neneng Oktantiningrum, Gita Almira Prasetyo, Bowo Yuli Rizal Rizal Sartika, Euis Sri Nur Yuliyawati Sri Widarti Suryani, Anny Syamsul Maarif Yuliyawati, Sri Nur