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All Journal (JIML) JOURNAL OF INNOVATIVE MATHEMATICS LEARNING Jurnal Ekonomi Manajemen Sistem Informasi Motor Bakar : Jurnal Teknik Mesin Nusantara: Journal for Southeast Asian Islamic Studies
Candra, Riki
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Religion Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Economics, Econometrics & Finance Education Energy Engineering Industrial & Manufacturing Engineering Mathematics Mechanical Engineering Transportation Other

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Analisis Perbandingan Campuran Aditif Etilen Glikol 30 banding 70 dan 50 banding 50 Pada Cairan Sistem Pendingin Toyota New Rush 1.5 MT Candra, Riki; Rofiroh, Rofiroh
Motor Bakar : Jurnal Teknik Mesin Vol 7, No 2 (2023): Motor Bakar: Jurnal Teknik Mesin
Publisher : Universitas Muhammadiyah Tangerang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31000/mbjtm.v7i2.9905

Abstract

A vehicle engine is a system that works simultaneously, which during operation can cause an increase in temperature due to the operation of an engine. Ethylon glycol is an additive used as a medium in cooling systems. When using coolants, ethylene glycol is often mixed with distilled water to obtain effective heat absorption results in the radiator. With an ethylene glycol composition of 30 to 70, namely a mixture of 30% ethylene glycol and 70% distilled water, and an ethyl glycol composition of 50 to 50, namely a mixture of 50% ethylene glycol and 50% distilled water for radiator use in the 2019 Toyota new Rush 1.5 MT. This test aims to obtain a comparison of the temperature values resulting from heat dissipation in the radiator between the two types of coolant composition. Tests carried out with rotations of 800, 1600, 2400 and 3200 RPM obtained results from using 30/70 colant, namely an average working temperature of 94.3oC and from using 50/50 colant, namely an average working temperature of 92.8oC. The use of LLC 30/70 coolant is 1.72% hotter than SLLC 50/50 coolant..
Analisis Konsumsi Daya Listrik Dan Penggunaan Mesin Bar Cutting Merk Seoul Type SUC 35 Candra, Riki; Rohman, Abdul
Motor Bakar : Jurnal Teknik Mesin Vol 8, No 2 (2024): Motor Bakar: Jurnal Teknik Mesin
Publisher : Universitas Muhammadiyah Tangerang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31000/mbjtm.v8i2.11795

Abstract

Mesin bar cutting atau mesin pemotong besi adalah alat yang digunakan untuk memotong besi beton sesuai dengan perencanaan. Penggunaan mesin bar cutting dalam pekerjaan konstruksi bangunan merupakan alat yang sangat diperlukan untuk proses pembuatan rangka beton, karena istilah bar pada nama mesin ini mengacu pada batangan baja tulangan. Penelitian ini bertujuan untuk mengetahui daya listrik yang di konsumsi oleh mesin bar cutting type SUC 35. Diketahui pada saat mesin di hidupkan (inrush) dihasilkan daya sebesar 10.417 watt,  pada saat hidup normal (running) dihasilkan daya sebesar 1.302 watt, kemudian pada saat memotong besi diameter 16mm sebanyak 3 batang sesuai dengan kapsitas yang tertera pada tabel kinerja pemotongan mesin 3.396 W, pada saat memotong besi diameter 25mm 1 batang 4.812 W dan pada saat memotong dengan kapasitas maksimal besi diameter 32mm 10.869 W.
ANALISIS PENYEBAB KERETAKAN WINDSHIELD TERHADAP KERUSAKAN HEATING ELEMENT DI PESAWAT AIRBUS 330 Candra, Riki
Motor Bakar : Jurnal Teknik Mesin Vol 9, No 1 (2025): Motor Bakar: Jurnal Teknik Mesin
Publisher : Universitas Muhammadiyah Tangerang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31000/mbjtm.v9i1.13476

Abstract

Flight safety is important to ensure passengers safely reach their destination. Aircraft have several parts in its maintenance, one of which is the windshield. Cracks in the windshield are often found due to damage to the heating element system. The rate of addition of heating element resistance is 0.133 /h and the rate of addition of windshield cracks to the number of flying hours is 0.02 mm/h. The measurement results show that the left and right windshield 9N-ALY registration aircraft with heating elements function properly. The left windshield of PK-GPV registration is in zone B with a dielectric yield of 0.8 mA (close to the limit of 1 mA). The measurement results for the PK-GPX registration aircraft stated that the left windshield had to be replaced. These results were obtained because the insulation test on the heating element was 78.8 Mohms (below the minimum limit of 100 Mohms). A low insulation test will cause the heating element system to have low insulation quality and leakage between the interconnections. If the windshield is not replaced, there will be a risk of failure of the heating element system and cracks on the windshield will occur.
Analisa Kerusakan Pompa Progressive Cavity Pada Pengoperasian di Kolam Lumpur Scum Dengan Posisi Suction Lift Candra, Riki; Jamaludin, Jamaludin
Motor Bakar : Jurnal Teknik Mesin Vol 9, No 4 (2025): Motor Bakar: Jurnal Teknik Mesin
Publisher : Universitas Muhammadiyah Tangerang

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Abstract

This study aims to determine the causes of damage to a progressive cavity pump operated in a scum waste pond. The pump is installed in a suction lift position, which is a position where the pump is above the liquid surface with a height of 4 meters and a liquid viscosity equivalent to a density of 6.5%. In this pump position, the pump is required to suck the liquid before the liquid enters the stator cavity and is then pushed to the discharge pipe. A Progressive Cavity Pump, abbreviated as PCP, is a type of pump that uses the Moineau principle to work. When the rotor rotates in the stator cavities, a vacuum condition will occur in the suction pipe, so that the liquid below the pump can move into the pipe towards the stator. However, because the suction lift height is too large exceeding the standard factory specification value of 2.5 meters, and the viscosity exceeds 5%, the speed of the liquid entering the stator cavity is reduced, resulting in the pump operating in dry running conditions for a fairly long time and the stator becoming hot due to friction with the rotor. This causes the elastomer in the stator to be damaged and the pump performance becomes less than optimal
Pengaruh Pendidikan, Jabatan Fungsional dan Profesionalitas Terhadap Kinerja Pegawai Di Badan Pusat Statistik Kota Dumai Candra, Riki; Hapzi Ali
Jurnal Ekonomi Manajemen Sistem Informasi Vol. 6 No. 2 (2024): Jurnal Ekonomi Manajemen Sistem Informasi (November - Desember 2024)
Publisher : Dinasti Review

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.38035/jemsi.v6i2.3388

Abstract

Pengaruh pendidikan dan jabatan fungsional terhadap profesionlitas adalah sebuah sebuah kajian penelitian mengukur tingkat kinerja pegawai. Tujuan dari tulisan ini ialah guna mengembangkan hipotesis perihal korelasi antara variabel-variabel yang akan menjadi landasan bagi penelitian mendatang. Objek penelitian mencakup sumber-sumber pustaka online seperti Mendeley, Google Scholar, and platform other academics. Metode yang diterapkan pada kajian ini ialah analisis literatur menggunakan sumber-sumber elektronik seperti e-book dan jurnal yang tersedia secara publik. Pendekatan analisis yang digunakan adalah deskriptif kualitatif. Berikut adalah temuan dari analisis ini:1) Pendidikan memiliki pengaruh terhadap kinerja pegawai;  2) Jabatan fungsional mempengaruhi kinerja pegawai ; dan 3) Profesionalitas memiliki dampak pada kinerja pegawai.
MENIMBANG AKAL DALAM FALSAFAH HIDUP BUYA HAMKA Kasmuri, Kasmuri; Candra, Riki; Ghofur, Abdul; Nasution, Syamruddin
Nusantara Journal for Southeast Asian Islamic Studies
Publisher : Universitas Islam Negeri Sultan Syarif Kasim Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24014/nusantara.v19i2.28371

Abstract

Banyak para tokoh Muslim terdahulu menyiapkan waktu dalam lembaran karyanya membahas tentang kedudukan akal pada diri manusia. Justru akallah yang membuat manusia berbeda dengan makhluk lainnya, dengan akal ini pula, sebagai salah satu sebab Allah mengamanahkan manusia sebagai khalifah dipermukaan bumi. Dari sekian banyak tokoh yang berbicara masalah akal, termasuk Buya Hamka di dalam bukunya Falsafah Hidup. Tujuan dari penelitian ini tidak lain adalah untuk mengetahui kedudukan akal menurut Buya Hamka dalam Falsafah Hidupnya. Penelitian ini menggunakan metode kualitatif deskriptif. Temuan dari penelitian ini menjelaskan, bahwa penggunaan akal dalam Islam menurut Buya Hamka harus mengikuti sebagaimana yang telah ditentukan oleh wahyu, di samping itu dia juga berpendapat bahwa antara akal dan agama saling membutuhkan, bahkan kesempurnaan kebahagian juga ditentukan oleh kesempurnaan akal.
The Implementation of Google Platform-Assisted E-Learning to Improve Students’ Mathematical Understanding on Junior High School Candra, Riki; Hendriana, Heris; Supriatna, Tatang
(JIML) JOURNAL OF INNOVATIVE MATHEMATICS LEARNING Vol. 9 No. 1 (2026): VOLUME 9 NUMBER 1, MARCH 2026
Publisher : IKIP Siliwangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22460/jiml.v8i4.29743

Abstract

The rapid development of digital technology has transformed the educational landscape, encouraging the integration of online learning platforms in classroom instruction. In mathematics education, e-learning tools offer opportunities to enhance students’ conceptual understanding through interactive and accessible digital media. This study aims to determine the improvement in students’ understanding of mathematical concepts through the implementation of Google Platform-assisted e-learning using Google Meet and Google Forms at SMP Negeri 2 Seruway. The research employed a quantitative approach with a pre-experimental method and a One Group Pretest–Posttest design. The population comprised all eighth-grade students (58 students), with class VIII-A consisting of 16 students selected as the sample. Learning activities were conducted using Google Meet for synchronous sessions and Google Forms for formative assessments on probability material. Data were collected through pretest and posttest instruments, and the results were analyzed using descriptive statistics and correlation tests. Findings revealed an increase in the average score from 53.94 before the treatment to 74.25 after. The hypothesis test used the t-test formula, obtaining a t-count value of 8.26, which was greater than the t-table value of 2.13 at a significance level of α = 0.05. These results indicate a significant improvement in students’ mathematical understanding after implementing e-learning through Google Meet and Google Forms. In conclusion, the use of Google-based e-learning effectively supports students’ conceptual understanding and promotes a more engaging mathematics learning experience.
Co-Authors Abdul Ghofur Abdul Rohman Hapzi Ali Heris Hendriana Jamaludin . Kasmuri Kasmuri, Kasmuri Rofiroh, Rofiroh Supriatna, Tatang Syamruddin, Syamruddin