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All Journal Al Qalam: Jurnal Ilmiah Keagamaan dan Kemasyarakatan IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Jurnal Ilmiah Ilmu-Ilmu Peternakan
Elvan, Elvan
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Agriculture, Biological Sciences & Forestry Automotive Engineering Biochemistry, Genetics & Molecular Biology Energy Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Social Sciences

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Pengaruh Kemampuan Berpikir Kritis dan Motivasi Kerja terhadap Learning Improvement, dengan Project Based Learning sebagai Variabel Mediasi, pada Guru Sekolah SMP di Kota Pekanbaru Elvan, Elvan; Zaman, Kamar
Al Qalam: Jurnal Ilmiah Keagamaan dan Kemasyarakatan Vol. 18, No. 2 : Al Qalam (Maret 2024)
Publisher : Sekolah Tinggi Ilmu Al-Qur'an (STIQ) Amuntai Kalimantan Selatan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35931/aq.v18i2.3388

Abstract

Tujuan dari penelitian ini adalah untuk menguji pengaruh kemampuan berfikir kritis dan motivasi kerja terhadap learning improvement yang dimediasi oleh project based learning pada guru sekolah SMP di Kota Pekanbaru. Penelitian ini mengadopsi pendekatan kuantitatif dengan sudut pandang deskriptif. Pengambilan sampel biasanya dilakukan secara acak. Perangkat lunak Structural Equation Modeling berbasis Partial Least Square (SEM-PLS). Hasil penelitian ini menunjukkan bahwa secara hubungan langsung kemampuan berfikir kritis tidak berpengaruh terhadap learning improvement, sedangkan motivasi dan project based learning berpengaruh terhadap learning improvement. Dalam hubungan tidak langsung berfikir kritis tidak berpengaruh terhadap learning improvement melalui project based learning, sedangkan motivasi berpengaruh terhadap learning improvement melalui project based learning.
Analisa Kekuatan Sambungan Las Tig pada Roll Bar Mobil KMHE dengan Alumunium 6061 Melalui Uji Bending Elvan, Elvan; Lubis, M. Sobron Yamin; Darmawan, Steven
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 4 No 1 (2025): April
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v4i1.203

Abstract

The welding process is a production process that aims to combine two types of materials into a usable component. In the manufacturing industry, the Tungsten Inert Gas welding process is widely used in industrial processes requiring high accuracy, good welding quality, and welding results. This study compares the strength of welded joints by varying the welding current. This research uses 6061 aluminum material to determine the strength of Tungsten Inert Gas welding joints. The study focused on the strength of Tungsten Inert Gas welding joints with current variations of 140 A, 160 A, and 180 A using a testing method using a three-point bending test to determine the right current variation in the Tungsten Inert Gas welding process. This study found that the current variation of 160 A with a strength of 203.7 N/mm2 is better than 140 A, 139.9 N/mm2, and 180A, 192.1 N/mm2 in Tungsten Inert Gas welding joints.
Potential of Andaliman Fruit Extract (Zanthoxylum acanthopodium) As A Natural Feed Additive on the Income Over Feed and Chick Cost (IOFCC) of Broiler Chickens Santi, Melia Afnida; Nurhayati, Nurhayati; Suryani, Heni; Maradon, Gusma Gama; Sinaga, Desi Maria; Pertiwi, Vindo Rossy; Elvan, Elvan; Karima, Fadhila Nurul
Jurnal Ilmiah Ilmu-Ilmu Peternakan Vol 29 No 1 (2026): Mei 2026
Publisher : Fakultas Peternakan Universitas Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/jiiip.v29i1.53579

Abstract

Background: The increase in feed and DOC costs has become the main factor squeezing the profit margins of broiler chicken businesses. Various phytogenic feed additives have been reported to improve production performance, but most studies still focus on biological parameters such as weight gain and feed conversion. Studies evaluating its impact on economic indicators, particularly Income Over Feed and Chick Cost (IOFCC), are still limited, especially regarding the use of local plants such as andaliman (Zanthoxylum acanthopodium). Objective: This study aims to analyze the effect of adding Andaliman extract in the feed on the IOFCC value of broiler chickens as an indicator of economic production performance. Method: The research was conducted over 28 days using a completely randomized design (CRD) with five treatments and four replications: P0 (without extract), P1 (0.5%), P2 (0.75%), P3 (1%), and P4 (1.25%). The observed parameters include feed price, ration cost, final weight, selling price, income, and IOFCC value. Data were analyzed descriptively and quantitatively based on actual economic evaluation. Results: The addition of Sichuan pepper extract increased final weight, income, and IOFC value. The highest IOFCC value was obtained in P4 at Rp 23,805.65/head, followed by P3 at Rp 22,994.75/head, while the lowest was in P2 at Rp 14,575.50/head. The 1–1.25% level shows the best economic efficiency, which is suspected to be related to the activity of bioactive compounds such as flavonoids and terpenoids. Conclusion: Andaliman extract at levels of 1–1.25% has the potential to serve as a natural feed additive based on local resources to enhance the efficiency and sustainability of broiler chicken farming.
Co-Authors Karima, Fadhila Nurul Maradon, Gusma Gama Nurhayati, Nurhayati Pertiwi, Vindo Rossy Santi, Melia Afnida Sinaga, Desi Maria Sobron Lubis Steven Darmawan, Steven Suryani, Heni Zaman, Kamar