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All Journal Rekayasa Mesin Abdi Dosen : Jurnal Pengabdian Pada Masyarakat Otopro Jurnal Abdi Insani Motor Bakar : Jurnal Teknik Mesin Verbum Christi Sagu KOMUNIDA: Media Komunikasi dan Dakwah Jurnal Teknik Terapan (J-TETA) Jurnal Alih Teknologi Sistem Informasi (JATSI) Spektra : Jurnal Ilmu-ilmu Sosial Jurnal Vokasi Bisnis Digital, Akuntansi Lembaga Keuangan Syariah dan Usaha Perjalanan Wisata Journal of Evrimata: Engineering and Physics Al-Risalah Jurnal Studi Agama dan Pemikiran Islam
Gunawan, Chandra
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Analisis Numerik Pengaruh Variasi Tinggi Vortex Generator terhadap Karakteristik Aerodinamika Sayap Berbasis Computational Fluid Dynamics (CFD) Perkasa, Rilis Eka; Mashudi, Imam; Gunawan, Chandra; Amrullah, Utsman Syah
Jurnal Teknik Terapan Vol. 4 No. 2 (2025): Oktober
Publisher : P3M Politeknik Negeri Jember

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

Abstract

A vortex generator is an aerodynamic device installed on wings or other surfaces to enhance lift and delay stall at high angles of attack. This study aims to analyze the effect of vortex generator installation on the aerodynamic characteristics of a straight wing. Numerical simulations were conducted using the computational fluid dynamics (CFD) method on a three-dimensional wing model with a NACA 4412 airfoil section. Triangular vortex generators with heights of 10 mm and 20 mm were applied, while a clean wing without vortex generator was used as a reference. The wing was subjected to an airflow velocity of 50 m/s at several angles of attack. The main parameters observed were the lift coefficient (CL), drag coefficient (CD), and flow visualization around the wing surface. The simulation results show that the addition of a 10 mm vortex generator increases CL at higher angles of attack compared to the clean wing. In contrast, the installation of a 20 mm vortex generator primarily resulted in a higher CD and did not provide a positive contribution to lift performance. Overall, it could be concluded that  for this research configuration, the 10 mm vortex generator increase the aerodynamic performance of the wing.
STUDI PENGGUNAAN MANIPULATOR TEGANGAN PADA SENSOR TEKANAN BAHAN BAKAR MESIN DIESEL COMMON RAIL DITINJAU DARI DAYA & KONSUMSI BAHAN BAKAR Farida, Nike Nur; Monasari, Ratna; Gunawan, Chandra; Aji, Supa K.
Otopro Vol 19 No 2 Mei 2024
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/otopro.v19n2.p71-77

Abstract

In a common rail diesel engine system, the entire fuel system is regulated electronically by a computer device called the ECU.  With this sensor manipulator tool, it is hoped that you will be able to change the output of the fuel pressure sensor to modify the ECU input. This makes it possible to change the power produced by the vehicle and reduce fuel consumption. This research is using experimental methods. The initial step is to take vehicle power test data under normal conditions, with the fuel pressure sensor output voltage at 1.28 V, reduced by 0.2 (1.08 volts), decreased by 0.1 (1.18 volts), increased by 0,1 (1.38 volts), and up 0.2 (1.48 volts). The results of this research show that the highest power at a speed of 80 km/h occurs at a voltage of 1.38 volts and 1.48 volts, with a power of 103 HP. Optimal fuel pressure produces good misting, ensures the mixture of fuel and air in the combustion chamber is homogeneous, and produces maximum power. The results of the fuel consumption test show that the lowest fuel consumption occurs at a vehicle speed of 40 km/hour with a fuel pressure sensor voltage of 1.38 volts, which is around 0.615 cc/second. It can be concluded that a voltage of 1.38 volts produces the most optimal fuel pressure. The throttle valve and pedal openings are still slightly open, so the amount of fuel entering the combustion chamber is also limited, so fuel consumption is very economical.
Digital Islamic Propagation Communication Strategies in Countering Religious Disinformation in the Post-Truth Era: A Literature Study Mastori, Mastori; Bahtiar, Ace Thoyib; Gunawan, Chandra; Dale, Ridho
KOMUNIDA : Media Komunikasi dan Dakwah Vol 15 No 2 (2025): KOMUNIDA: Media Komunikasi dan Dakwah
Publisher : Fakultas Ushuluddin, Adab, dan Dakwah IAIN Parepare

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35905/komunida.v16i2.15172

Abstract

One of the negative impacts of the development of digital technology is the weakening of authoritative facts and the increasing dominance of opinion in the public sphere. This situation strengthens the spread of religious disinformation in digital media, which has the potential to shift the authenticity of Islamic thought. Departing from this fact, this study seeks to analyze how da'wah communication strategies can function as a mechanism to counter religious disinformation in the post-truth context. This study uses a qualitative method with a literature study approach to articles or books published between 2016 and 2024. The data was obtained through a systematic search process in the Google Scholar database, books, and various research results. The literature selection was based on the following criteria: relevance to the theme of digital da'wah communication, media literacy, and post-truth studies; and publications that provide empirical findings or theoretical frameworks related to countering disinformation. The analysis results show three main findings: first, implementing effective digital da'wah communication practices in the post-truth era consistently utilizes the principle of ttabayyun as an information verification mechanism; second, increasing digital literacy among da'i and audiences has been proven to be a factor that directly reduces vulnerability to misinformation and disinformation; Third, creative, data-driven da'wah content that adheres to digital communication ethics has a higher level of reach and public trust. This third finding demonstrates that digital da'wah communication plays a crucial role as a social instrument for maintaining the integrity of religious information amidst the dominance of opinion in the post-truth era.
NABI IDRIS AS: TELADAN ILMIAH DAN SPIRITUAL DALAM DAKWAH ISLAM Anim, Sarbini; Gunawan, Chandra; Hudri, Dudun Syaiful; Khuzamy, Muhammad; Huwaida, Hasna'
Spektra: Jurnal Ilmu-ilmu Sosial Vol 6 No 3 (2024): Jurnal Spektra: Jurnal Ilmu-Ilmu Sosial
Publisher : Fakultas Agama Islam Universitas Islam As Syafi'iyah

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34005/spektra.v6i3.5283

Abstract

Nabi Idris AS dikenal sebagai salah satu nabi yang memiliki keistimewaan dalam hal ilmu pengetahuan, ketekunan, dan spiritualitas. Dalam literatur Islam, beliau disebut sebagai sosok yang pertama kali memperkenalkan tulisan, menjahit pakaian, serta meneliti pergerakan bintang. Artikel ini bertujuan untuk mengkaji keteladanan Nabi Idris AS dalam konteks dakwah, terutama terkait pentingnya ilmu dan amal dalam kehidupan seorang dai. Penelitian ini menggunakan pendekatan kualitatif melalui studi pustaka dengan analisis tafsir dan hadis. Hasil kajian menunjukkan bahwa metode dakwah Nabi Idris AS mengintegrasikan ilmu, amal, dan hikmah, sehingga dapat menjadi model dakwah ilmiah dan beradab di era modern.
FONDASI PERADABAN ISLAM: PELAJARAN DARI MASA KHULAFAUR RASYIDIN Gunawan, Chandra; Sirojuddin, Sirojuddin; Islam, Fahmi; Mastori, Mastori; Darmi, Darmi
Spektra: Jurnal Ilmu-ilmu Sosial Vol. 6 No. 3 (2024): Jurnal Spektra: Jurnal Ilmu-Ilmu Sosial
Publisher : Fakultas Agama Islam Universitas Islam As Syafi'iyah

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34005/spektra.v6i3.5305

Abstract

Peradaban Islam mengalami fondasi yang kuat sejak masa Khulafaur Rasyidin, yang meliputi Abu Bakar, Umar bin Khattab, Utsman bin Affan, dan Ali bin Abi Thalib. Kepemimpinan mereka tidak hanya bersifat administratif, tetapi juga menjadi teladan integrasi nilai spiritual, etika, hukum, dan kesejahteraan sosial. Studi ini menggunakan pendekatan interdisipliner dengan metode kualitatif analisis literatur klasik dan kontemporer untuk mengeksplorasi praktik kepemimpinan, penerapan syariah, dan pembangunan masyarakat pada periode tersebut. Hasil kajian menunjukkan bahwa struktur politik, sistem hukum, serta kebijakan sosial-ekonomi pada masa Khulafaur Rasyidin menekankan prinsip keadilan, kemaslahatan publik, dan pendidikan, yang relevan sebagai model pembangunan peradaban Islam kontemporer. Temuan ini mengindikasikan bahwa nilai-nilai kepemimpinan, etika, dan integrasi hukum-spiritual tetap dapat dijadikan pedoman dalam menghadapi tantangan modernitas dan transformasi sosial-politik.
PEMANFAATAN LIMBAH KULIT NANAS SEBAGAI BAHAN BAKU SABUN CAIR ALAMI: INOVASI PENGOLAHAN LIMBAH DI DESA UJUNG BATU TIMUR Nopiani, Yanti; Yusmarini, Yusmarini; Johan, Vonny Setiaries; Fitriani, Shanti; Riftyan, Emma; AR, Nur Hasnah; Salman, Annisa Nazifa; Ristia, Jeany; Panjaitan, Bintang Sipartogi; Gunawan, Chandra
Jurnal Abdi Insani Vol 12 No 12 (2025): Jurnal Abdi Insani
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/abdiinsani.v12i12.2666

Abstract

Pineapple (Ananas comosus) is a nutrient-rich tropical plant often processed into various products. At the same time, its peel waste contains valuable compounds such as bromelain enzyme and ascorbic acid, which are beneficial for skin care. Based on observations by students from the KKN MBKM program at the Faculty of Agriculture UNRI, it was found that the society is very interested in programs that discuss the processing of organic waste using simple methods, in line with the potential for utilizing agricultural product waste in Ujung Batu Timur village. This activity involves utilizing pineapple peel waste as a natural additive in the production of liquid soap through a community service program in Ujung Batu Timur, Rokan Hulu, Riau Province. This community service initiative aims to raise awareness among the community about organic waste management and enhance skills in creating economically valuable products. The methods used include socialization and practical training on making liquid soap from pineapple peel extract. The community service activities are carried out in three stages: preparation, implementation, and evaluation held at the Ujung Batu Timur Village Office and involving 23 participants. Post-training survey results show that most participants felt satisfied and benefited from this activity, with a satisfaction level of 80.45%. This program is expected to contribute to the development of micro-enterprises and improve the welfare of the local community.
APPLICATION OF BENENG TARO STARCH EDIBLE FILM WITH THE ADDITION OF PINEAPPLE EXTRACT IN PINEAPPLE DODOL Wulansuci, Trivira; Zalfiatri, Yelmira; Nopiani, Yanti; Gunawan, Chandra; Yolanda, Anne Mudya
SAGU Vol. 25 No. 1 (2026): SAGU Journal – Agri. Sci. Tech., Maret, 2026, Vol. 25 : No. 1
Publisher : Fakultas Pertanian Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jsg.v25i1.78

Abstract

The objective of this study was to determine the optimal combination of beneng taro starch and pineapple peel extract in the formulation of edible films for pineapple dodol packaging. As a semi-moist food,  pineapple dodol is highly susceptible to spoilage, therefore the application of an edible film coating serves  as a strategic solution to extend its shelf life. This research evaluates how varying these components affects the functional characteristics of the film to ensure maximum protection for the product. The experimental design used was a completely randomized factorial design with 2 factors, namely the addition of taro starch (2 g, 3 g, 4 g, 5 g) and the addition of pineapple peel extract (1%, 2%, 3% v/v), with 3 repetitions. Parameters observed were edible film thickness, water vapor transmission rate (WVTR), water resistance, moisture content of the dodol, total plate count (TPC), and sensory aroma evaluation. Data were statistically using Analysis of Variance (ANOVA) and continued with Duncan’s Multiple Range Test (DMRT) at the 5% level. Results indicated an interaction effect between starch and extract on the WVTR  and water resistance of the edible film.  The individuals treatments significantly affected thickness, WVTR, water resistance, moisture, TPC, and aroma scores. The best treatment was P5K3 (5 g of beneng taro starch and 3% pineapple peel extract) with criteria of thickness 0.221 mm, WVTR 6.67 g/m²/hour, percentage swelling water resistance 81.71%, moisture content 20.50%, TPCS 3.52 log CFU/g, and descriptive aroma of pineapple dodol 1.33 (not rancid) lasts until the 6th day. 
The Concept of Faith in the Letter of James: A Discourse Analysis on James 1-2 Gunawan, Chandra
Verbum Christi: Jurnal Teologi Reformed Injili Vol 3 No 1 (2016): Verbum Christi
Publisher : STT Reformed Injili Internasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51688/vc3.1.2016.art2

Abstract

James' teaching about faith has been downplayed for so many years. Since the concept of faith in the NT has been read mainly in light of Paul's theology, scholars ignores James? teaching on faith, which has different emphasis from Paul. Biblical scholars and theologians have tried to solve the tension between Paul's teaching about faith and James'. While historical approach applied to deal with this issue has lead NT scholarship to enless debate, this study proposes that the Letter of James was not sent to handle problems that occur because of Paul. This essay uses discourse analysis to understand how the the concept of faith in James 1 and 2 should be grasped. This work finds that James addresses his letter to pastoral believers? community and help them to understand sufferings in their lives. James emphasizes that faith is not only a confession but also a commitment to live in accordance with the true belief.
God is Light and Living in the Light: Reading 1 John 1-2 in Light of Discourse Analysis Gunawan, Chandra
Verbum Christi: Jurnal Teologi Reformed Injili Vol 4 No 2 (2017): Verbum Christi
Publisher : STT Reformed Injili Internasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51688/vc4.2.2017.art5

Abstract

The notion that "God is light" is essential to the understanding of the literary structure of 1 John because it links units of thought in the Epistle. This central idea and its ethical implications, "living in the light" and "living in love," develop throughout the letter. To understand the function of this concept and to grasp its meaning in 1 John, the present study utilizes discourse analysis to read the document in light of its micro and macro structures. Interpreting the "God is light" teaching in the Epistle-based on its literary structure-will shed some light on understanding the main issue addressed in 1 John.?
Co-Authors A.A. Ketut Agung Cahyawan W Adie Perdana, Fengky Aji, Supa K. Amrullah, Utsman Syah Anim, Sarbini Anne Mudya Yolanda AR, Nur Hasnah Asmawi, Moh Asrori Asrori Bahtiar, Ace Thoyib Bhakti, Muhammad Nusa Dale, Ridho Darmi, Darmi Eko Siswanto Eko Yudiyanto Farida, Nike Nur Fauzan, Setya Hafizhah, Haura Husniyyah Harie S Jaya Hudri, Dudun Syaiful Huwaida, Hasna' Imam Mashudi, Imam Islam, Fahmi Khuzamy, Muhammad Kris Witono Laela Susanto Lilis Yuliati Mahfuz Mastori, Mastori Maulana, Acep Ahmad Monasari, Ratna Nila Nopiani, Yanti Nugroho, Pipit Wahyu Panjaitan, Bintang Sipartogi Perkasa, Rilis Eka Rahman Yasin, Rahman Rakista, Putri Mutiara Rifa’i, Muhamad Riftyan, Emma Ristia, Jeany Salman, Annisa Nazifa Satworo Adiwidodo Shanti Fitriani Sirojuddin Sirojuddin Sulaksono, Bambang Virna, Nabila Vonny Setiaries Johan Weddakarti, Eva Widjanarko Widjanarko, Widjanarko Wulansuci, Trivira Yelmira Zalfiatri Yusmarini Yusmarini