Pengaruh Penggunaan Jet Ranger dan Kuantitas Udara Masuk terhadap Daya Sepeda Motor 150cc
(Rangga Retiadji Prasetyawan, Khambali Khambali, Yuniarto Agus Winoko, Bagus Wahyudi)
DOI : 10.61132/mars.v3i4.986
- Volume: 3,
Issue: 4,
Sitasi : 0 05-Aug-2025
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| Last.06-Aug-2025
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Motorcycle engine performance is highly dependent on the air intake system, which plays a crucial role in the combustion process. One common method for improving engine performance is modifying the intake system, either by installing additional devices or adjusting the quantity of incoming air. One innovation that is starting to be widely used is the Jet Ranger, an additional device on the intake duct that is claimed to be able to increase air flow into the combustion chamber. This study aims to determine the effect of the use of Jet Ranger and variations in the quantity of incoming air on the maximum power of a 150 cc motorcycle engine, as well as to analyze the interaction between the two variables. The study was conducted using an experimental method with a two-way factorial approach. The independent variables in this study consisted of two factors, namely the use of Jet Ranger (without Jet Ranger and with Jet Ranger) and variations in the quantity of incoming air divided into four levels (0.008; 0.012; 0.016; and 0.020 kg/s). Maximum power testing was conducted using a Leads dynotest, while the mass of incoming air was calculated based on air velocity measured using a digital anemometer. The test data were statistically analyzed using a two-way ANOVA to identify the effect of each factor and the interaction between them on engine power. The results of the study indicate that the use of Jet Ranger significantly increases engine power. Variations in the quantity of intake air also significantly affect the power generated. In addition, the interaction between the use of Jet Ranger and the quantity of intake air is proven to have a significant impact on increasing the maximum engine power. These results are in line with the theory of intake systems which states that increasing optimal air flow can increase the volumetric efficiency of the engine, and are supported by findings from previous studies. Therefore, these findings can be used as a reference in the development of air intake systems on motorcycles to achieve more optimal engine performance.
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2025 |
Pengaruh Variasi Diameter Disc Dan Jumlah Lubang Pada Piringan Cakram Terhadap Jarak Pengereman dan Temperatur Pada Piringan Cakram
(Moch. Alifal Fain Zulfa Akbar, Purwoko Purwoko, Khambali Khambali, Ahmad Hanif Firdaus)
DOI : 10.59581/jkts-widyakarya.v3i3.5399
- Volume: 3,
Issue: 3,
Sitasi : 0 30-Jul-2025
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| Last.02-Aug-2025
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Disc discs are the main component in a motorcycle braking system that functions to convert kinetic energy into heat energy through friction. The geometric design of the disc, including the diameter and number of holes, affects the effectiveness of braking as well as the heat dissipation ability. This study aims to analyze the effect of variations in diameter and number of holes on disc discs on braking distance and disc temperature. The research method used was an experimental method with three variations in disc diameter (190 mm, 220 mm, and 260 mm) and three variations in the number of holes (30, 36, and 42 holes). The test was carried out through a controlled braking procedure at an initial speed of 40 km/h on flat road surfaces with stable weather conditions. Braking distance data is measured using ultrasonic sensors, while disc temperature is recorded with a high-accuracy infrared thermometer. The results showed that the diameter of the disc disc had the most significant influence on the braking distance. The larger the diameter, the greater the braking moment resulting so that the stopping distance becomes shorter. The number of holes in the disc also plays a role in heat dissipation because the holes enlarge the heat dissipation area. However, the increase in the number of holes tends to slightly increase the braking distance due to a reduction in the area of frictional contact field. The most optimal configuration is found on a 260 mm diameter disc with 42 holes, which results in the shortest braking distance of 8.25 meters and the lowest temperature rise of 4.47°C. Statistical analysis using Two-Way ANOVA confirmed that the diameter and number of holes had a significant effect individually, but there was no significant interaction between the two. These findings confirm that the selection of the right disc dimensions is critical to improving braking performance, thermal efficiency, and rider safety.
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2025 |
Pengaruh Perbaikan dan Penggunaan Variasi Persentase Elektrolit Terhadap Daya dan Ketahanan Lead Acid Battery Bekas Tipe NS40
(Dava Alifiano, Khambali Khambali)
DOI : 10.61132/venus.v3i3.968
- Volume: 3,
Issue: 3,
Sitasi : 0 02-Jul-2025
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| Last.06-Aug-2025
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The amount of load on the vehicle requires a balance current and voltage. To fullfill the requirement, vehicle use a energy stroage media called lead acid battery. Although the lead acid battery have a impaccable durability, the performance will be decrase as long as use, especially in term of power and durability. The downgrade performance from the battery make high cost replacement, meanwhile there is a change to fix the battery. One of the methode to fix is replace the cell and added H?SO? electrolyte concentrat variation. This research intend to examine repairment effectivity and electrolyte concentrat variation on power for used lead acid battery NS40 type. H?SO? electrolyte that used is 30%,40% and 45% examine with 5 static dummy load 1 ? 100 W pararrel circuit. Each electrolyte examine 60 times to obtain performance and durability data. The results show that increasing the concentration of H?SO? has a significant effect to produce the voltage and current. At 30% concentrate, an average voltage is 9.8 V and the current is 30.125 A at 40% concentarte, the voltage is 10.18 V and the current is 32.731 A and at 45% concentrate, the voltage is 10.19 V and the current 33.375 A.
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2025 |
Persepsi Siswa Terhadap Praktik Pelanggaran Hak Asasi Manusia Di Media Sosial: Pada Kalangan Pelajar SMA
(Dita Maisaroh Nasution, Alia Dwi Elzenia, Belsa Salfira, Ekmal Musryid, Nabila Ananda Putri, Nadely Syarrova Jefita, Naela Athifa, Tamala Tahmi, Yuliana, Hambali)
DOI : 10.51903/8fkfb520
- Volume: 3,
Issue: 2,
Sitasi : 0 31-May-2025
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| Last.23-Jul-2025
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This study explores high school students' perceptions and awareness of human rights violations (HRV) on social media. Using a mixed-method approach involving interviews and questionnaires with 100 students from five schools in Pekanbaru, the research reveals that the majority of students recognize various HRV issues such as hate speech, cyberbullying, discrimination, and privacy violations, and understand their impacts. Approximately 75% of students feel responsible to report HRV incidents, though some hesitate due to fear or perceived helplessness. While most students are familiar with the term HR, only 60% can accurately define protected rights like privacy and freedom from bullying. The average awareness score is 7.5 out of 10, influenced by socio-economic background and parental education. Findings indicate that 70% have witnessed hate speech, 55% have experienced or observed cyberbullying, and 60% acknowledge that spreading hoaxes infringes on the right to information. A significant majority (85%) agree that HR education should be integrated into school curricula. Despite high awareness levels, students' understanding of the boundaries and consequences of digital expression remains limited, highlighting the need for ongoing educational interventions and curriculum development in digital ethics and human rights. The study emphasizes the importance of continuous literacy programs and recommends further research with broader geographic scope and qualitative methods to deepen understanding.
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2025 |
Pendidikan Kewarganegaraan di Tengah Tantangan Globalisasi
(Vanny Permata Rinda, Dyana Sukma, Fikria Humaimah, Andi Mustika Rosa, Diva Rahdatul Hasnah, Alwi Sihab, Yofi Lasimta Mansur, Syukran Setiawan, Hambali Hambali)
DOI : 10.59581/garuda.v3i2.4980
- Volume: 3,
Issue: 2,
Sitasi : 0 23-May-2025
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| Last.02-Aug-2025
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This article discusses how Civic Education can be a solution in facing the challenges of globalization, by instilling the values of Pancasila, love for the homeland, social responsibility, and strengthening national identity. The methods used are literature studies and qualitative analysis of various relevant sources. The results show that globalization brings a great challenge to Indonesia's national identity, especially among the younger generation. The flow of information and foreign culture that enters without borders can weaken the spirit of nationalism and local values such as mutual cooperation and tolerance. In this context, Civic Education (PKn) has a strategic role in building a strong national character and integrity. Emphasis on the importance of integrating national values in civil society is very important in forming a young generation that is resilient, critical, and ready to contribute to the global world without losing their identity as Indonesian citizens.
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2025 |
Workshop Penggunaan Sistem Informasi Prediksi Penjualan Bahan Bangunan Pada UD Berkat Jaya Kecamatan Talawi
(Hambali Hambali, Cecep Maulana, Zulkhairani, Dewi Novita)
DOI : 10.59435/jiss.v3i1.478
- Volume: 3,
Issue: 1,
Sitasi : 0 03-Feb-2025
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| Last.22-Jul-2025
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Kegiatan workshop pengabdian masyarakat yang bertajuk “Workshop Penggunaan Sistem Informasi Prediksi Penjualan Bahan Bangunan pada UD Berkat Jaya Kecamatan Talawi” dilatarbelakangi karna belum adanya sistem komputerisasi dalam penentuan stok barang yang kemudian berhasil dikerjakan dan tentu belum mengerti cara penggunaan aplikasinya maka kegiatan ini bertujuan untuk memberikan panduan dalam penggunaan dan pemanfaatan fitur-fitur aplikasi Prediksi Penjualan Bahan Bangunan. Dengan workshop ini, pemilik dan admin UD Berkat Jaya Kecamatan Talawi dapat memahami cara memprediksi stok barang secara objektif, sehingga memudahkan dalam pengambilan keputusan yang lebih efektif. Metode yang digunakan dalam kegiatan ini meliputi penjelasan deskriptif dan praktik langsung. Pemateri memberikan penjelasan tentang fitur-fitur dalam Sistem Informasi Prediksi Penjualan Bahan Bangunan dengan praktik langsung, sehingga pemilik dan admin dapat lebih memahami materi dan konsep yang disampaikan. Luaran yang menjadi target dalam pengabdian ini adalah publikasi artikel pada jurnal nasional belum terakreditasi.
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2025 |
Perlindungan Hukum Terhadap Anak Korban Kekerasan Seksual
(Kharisma Yatini, Hambali Yusuf, Erli Salia)
DOI : 10.26623/humani.v14i2.9180
- Volume: 14,
Issue: 2,
Sitasi : 0 27-Nov-2024
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| Last.09-Jul-2025
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Penelitain ini dilakukan di pangkalan balai Banyuasin Sumatera Selatan.Penelitian ini bertujuan untuk Untukmenganalisis dan menjelaskan perlindungan hukum bagi anak sebagaikorban kekerasan seksual. (AnalisisPutusan No 5/Pid.Sus/2023/PN Pkb Dan 33/Pid.Sus/2023/PN Pkb). Metode yang digunakan dalam penelitianini adalah metode penelitian Yuridis Normatif dilakukan dengan cara meneliti data sekunder yangberhubungan dengan Kekerasan seksual terhadap Anak yang dilakukan di daerah Pangkalan Balai denganAnalisis Putusan yang ada di Pangkalan Balai, dan mengunakan Teknik Analisis Data dalam penelitian iniyaitu teknik Deskriptif Kualitatif teknik menggambarkan, mengurai dan mengungkapkan semua pertarunganyang ada dan lalu disimpulkan secara induktif yaitu menarik konklusi menurut yang bersifat spesifik keumum. Berdasarkan hasil penelitian, Kekerasan seksual terhadap anak masih ada dan mungkin slalu ad ajikakita tidak Bersama-sama memberantas kasus tersebut dengan tidak mencemoohkan korban, keluarga korban,terlebih korban adalah anak di bawah umur, serta untuk lebih menguatkan iman dan ilmu agama, karena kasuskekerasan seksual kadang pelaku adalah orang terdekatnya sendiri dan Putusan hakim terhadap vonis pidanadalam kasus ini di lihat dari hal-hal yang memberarkan kasus tersebut
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2024 |
Pengaruh Model Pembelajaran Problem Based Learning terhadap Kemampuan Berpikir Kritis Siswa pada Materi Ekosistem Siswa Kelas X SMA Negri 2 Gowa
(Dzul Fahmi, Hilmi Hambali, Muh Wajdi)
DOI : 10.62383/pentagon.v2i4.288
- Volume: 2,
Issue: 4,
Sitasi : 0 04-Nov-2024
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| Last.24-Jul-2025
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This research aims to determine the influence of the Problem Based Learning Model on Students' Critical Thinking Ability on Ecosystem Material for Class X Students of State High School 2 Gowa. This type of research uses a quasi-experimental type of research or also called quasi-experiment with a "random pretest posttest control group" design model. There are two data collection techniques in this research, namely, test and non-test, then the data collected is analyzed using descriptive analysis and inferential test analysis. The research results show that the average critical thinking ability students in the experimental class who were taught using the Problem Based Learning learning model were in the very good category with an average score of 78.52 and students' critical thinking abilities, while in the control class who were taught using the lecture method were adequate with an average score 52.55. Inferential analysis in hypothesis testing shows significant results with a sig value of 0.000 > 0.05 so that there is an influence of the Problem Based Learning learning model on students' critical thinking abilities in ecosystem material. This is also reinforced by the results of observations regarding student activity increasing.
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2024 |
SISTEM INFORMASI PENDAFTARAN PAUD, TK DAN DAYCARE DI AZZAMIL SCHOOL KEDUNGWUNI BERBASIS WEB
(Fauziatus Sa'adah, Alfa Yuliana Dewi, Ahmad Khambali, Ichwan Kurniawan)
DOI : 10.47775/ictech.v19i2.310
- Volume: 19,
Issue: 2,
Sitasi : 0 30-Oct-2024
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| Last.18-Jul-2025
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Pada setiap tahunnya sekolah selalu melakukan proses penerimaan peserta didik baru untuk menyeleksi calon peserta didik yang akan mendaftar. Paud, TK, Daycare Azzamil School merupakan salah satu sekolah yang berada di kedungwuni dan beberapa cabang lain nya yang melakukan penerimaan peserta didik baru. Dalam proses pendaftaran yang dilaksanakan Paud, TK, Daycare Azzamil School masih menggunakan cara manual, yaitu masih menggunakan brosur dan formulir kertas. Hal tersebut dapat menimbulkan beberapa kendala yaitu hilangnya data dan memakan waktu yang lama untuk menginputkan data yang terdapat pada formulir. Dari permasalahan tersebut, maka dibutuhkan sistem informasi pendaftaran yang dapat mengurangi kendala yang mungkin akan terjadi pada sistem sebelumnya. Sistem informasi pendaftaran berisi proses pendaftaran mulai dari pemberian informasi pendaftaran, mengisi formulir, pengecekan data, dan laporan hasil seleksi berupa aplikasi website. Dalam pembuatan website akan menggunakan PHP. Hasil penelitian sistem informasi pendaftaran pada Paud, TK, Daycare Azzamil School berbasis website ini dapat mempermudah dan membantu dalam proses pendaftaran.
Kata kunci: Sistem Informasi, Penerimaan Peserta Didik Baru.
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2024 |
Adversarial Convolutional Neural Network for Predicting Blood Clot Ischemic Stroke
(Moshood A. Hambali, Paul A. Agwu)
DOI : 10.62411/jcta.10516
- Volume: 2,
Issue: 1,
Sitasi : 0 01-Jun-2024
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| Last.31-Jul-2025
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Digital Pathology Image Analysis (DPIA) is one of the areas where deep learning (DL) techniques offer modern, cutting-edge functionality. Convolutional Neural Network (CNN) technology outperforms the competition in classification, segmentation, and detection tasks while being just one of numerous DL techniques. Classification, segmentation, and detection methods can often be used to address DPIA concerns. Some difficulties can also be resolved using pre- and post-processing techniques. However, other CNN models have been investigated for use in addressing DPIA-related issues. Furthermore, the research seeks to explore how susceptible the model is to adversarial attacks and suggest strategies to counteract them. To predict ischemic strokes caused by blood clots, the authors of this study developed CNN with a pixel brightness transformation (PBT) technique for image enhancement and developed several approaches of image augmentation techniques to increase and provide the learning model with more diverse features. Also, adversarial training was integrated into CNN models to train the model with perturbed data in order to assess the impact of adversarial noise at different stages of training. Several metrics, including precision, F1-score, accuracy, and recall, are utilized to assess the experiments' effectiveness. The research findings indicate that employing transfer learning with a deep learning model achieved an accuracy of up to 97% using the ReLU activation function. Also, data augmentation helps improve the accuracy of the model.
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2024 |