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All Journal e-Jurnal Rekayasa dan Teknologi Budidaya Perairan Astonjadro Jurnal Manajemen Dan Bisnis Ekonomi
Johanes Tarigan
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Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance

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KAJIAN BIOLOGI IKAN TEMBAKANG (Helostoma temminckii) DI RAWA BAWANG JUYEUW KABUPATEN TULANG BAWANG BARAT Johanes Tarigan; Rara Diantari; Eko Efendi
e-Jurnal Rekayasa dan Teknologi Budidaya Perairan Vol 3, No 2 (2015)
Publisher : University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (356.821 KB)

Abstract

Kajian perikanan pada tembakang (Helostoma temminckii) di Rawa Bawang Juyeuw Kabupaten Tulang Bawang Barat dilakukan untuk mempelajari potensi biologinya. Kajian ini diperlukan sebagai data dasar domestikasi tembakang sebagai ikan budidaya dan konservasi. Hasil penelitian menunjukkan bahwa waktu terbaik untuk penangkapan tembakang ukuran benih sampai dewasa adalah pada Maret sampai April dengan menggunakan jaring tancap yang tidak mematikan tembakang. Morfologi tembakang pada ukuran yang berbeda menunjukkan stok yang belum tereksploitasi dan layak dijadikan plasma nutfah perikanan tangkap dan budidaya yang berkelanjutan. Pada ukuran benih sampai dewasa isi pencernaan tembakang didominasi oleh plankton sebagai makanan utamanya. Masyarakat lokal disarankan untuk menjadikan tembakang sebagai alternatif sumber protein hewani selain ikan eksotis yang mulai banyak berkembang di Rawa Juyeuw.
Pengaruh Tata Kelola Perusahaan Terhadap Volatilitas Laba (Studi Empiris Pada Perusahaan IPO di Indonesia) Johanes Tarigan; Agus Zahron Idris
JURNAL MANAJEMEN DAN BISNIS EKONOMI Vol. 1 No. 3 (2023): July : JURNAL MANAJEMEN DAN BISNIS EKONOMI
Publisher : Institut Teknologi dan Bisnis (ITB) Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54066/jmbe-itb.v1i3.471

Abstract

This study aims to determine the effect of institutional ownership, managerial ownership, and the proportion of independent commissioners on profit volatility in companies carrying out Initial Public Offerings (IPO) during 2018 - 2020 with sales growth as a control variable. The research method uses quantitative methods. The population in this study are companies that carry out Initial Public Offerings (IPO) on the Indonesian Stock Exchange. Based on the sample selection criteria, a sample of 152 companies was obtained. The data analysis technique used was descriptive statistical analysis, classical assumption test, F test and T test. The results showed that institutional ownership and managerial ownership had no effect on earnings volatility. Meanwhile, the disclosure of the proportion of independent commissioners has an effect on earnings volatility.
Behavior of Column Reinforced UHPFRC Materials using Excentric Loading Siahaan, Ruth Navratilova; Tarigan, Johanes; Bakar, Badarol Hisham Abu; Nursyamsi, Nursyamsi
ASTONJADRO Vol. 14 No. 2 (2025): ASTONJADRO
Publisher : Universitas Ibn Khaldun Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32832/astonjadro.v14i2.17919

Abstract

Column is part of reinforced concrete which has a function as a support. However, columns are often damaged by earthquakes. Damage to the column results in the need for treatment to improve the quality of the column. One way that can be done to repair the column is by providing a layer of UHPFRC reinforcement to the damaged column. UHPFRC is a concrete that has very high quality. Research on the UHPFRC continues today to get updates on the advantages of UHPFRC. In this study, the columns used were 4 samples. One sample is used as a control column which is tested by loading until it collapses and the remaining 3 samples will be reinforced with various variations of UHPFRC thicknesses of 10, 15 and 20 mm. The column is first given a load of 50% of the maximum load of the control column. The loading given to the column with eccentric loading is 175 mm. The results of laboratory tests carried out by compression testing showed that the reinforced column experienced an increase in maximum load compared to the control column. The maximum load on the control column (CC) is 17.79 kN, while the column with 10 mm thick UHPFRC (RT-C1) is 49.80 kN, the column with 15 mm thick UHPFRC is 59.60 kN and the column with 20 mm thick UHPFRC of 69.80 kN. The maximum load capacity increase in the reinforced column compared to the control column is RT-C1 55.63%; RT-C2 86.25% and RT-C3 118.13%. As a result of the load received on the column, resulting in shortening towards the vertical. The shortening that occurs in the control column (CC) is 17.79 mm; RT-C1 at 17.95mm; RT-C2 of 18.51 mm and RT-C3 of 19.84 mm. The results of this study indicate that UHPFRC can be used as a reinforcement material for reinforced concrete columns.
Co-Authors Agus Zahron Idris Bakar, Badarol Hisham Abu Eko Efendi Nursyamsi Nursyamsi Rara Diantari Siahaan, Ruth Navratilova