Vol 17, No 2 (2021)

Available Online in November 2021

DOI: http://dx.doi.org/10.36055/tjst.v17i2

Table of Contents

Original Research Article

Experimental study of the effect of adding bioethanol to RON 90 gasoline on exhaust gas emissions of a four-stroke motor vehicle
Hadi Sutanto, Christefa Hendy Setianto
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113 - 118
Characteristics of aluminum-based composites reinforced of Al2O3/B4C by accumulative roll bonding (ARB)
Agus Pramono, Anne Zulfia, Ali Alhamidi, Alfirano Alfirano, Suryana Suryana, Anistasia Milandia
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119 - 124
The effect of current strength on tensile strength and impact toughness of cast iron welded joints
Wijoyo Wijoyo, Mujahid Mujahid, Achmad Nurhidayat, Eko Surjadi, Iman Saefuloh
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125 - 130
Planning and controlling raw materials using the material requirements planning method
Ira Silfiani, Deasy Kartika Rahayu Kuncoro, Farida Djumiati Sitania
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131 - 137
Improvement of the power factor on the distribution line feeder Sutami 23 Lampung using capacitor bank and SVC with ETAP 12.6 simulation
Alvin Harista Rahman, Ahmad Hidayahtullah, Afrida Nurul Ulfa, Rizal Zulfiqri Ahmad, Jimmy Trio Putra
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138 - 149
Article review: Comparison of octane booster additive for gasoline
Gustiana Awaludin Sobarsah, Nuryoto Nuryoto, Jayanudin Jayanudin
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150 - 157
Analysis security system performance MIPv6 in signaling process using AES and Twofish algorithms
Supriyanto Praptodiyono, Fadil Muhammad, Dhandy Wiriyadinata
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158 - 164
Application of contemporary smart building architecture at the Parahyangan Citywalk Shopping Center in Kota Baru Parahyangan
Agung Prabowo Sulistiawan, Muhammad Aflah Fernanda, Andiyan Andiyan
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165 - 173
Analysis of the application of the lean six sigma method to minimize waste in the plywood production process
Fadila Meriska Putri, Anggriani Profita, Suwardi Gunawan
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174 - 182
Effect of substitution of coconut coir waste on the compressive strength of non-structural concrete
Imam Heru Nurfais, Nur Azizah Affandy, Salwa Nabilah
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183 - 190
Implementation of an omnidirectional antenna on a 4G repeater with a working frequency of 1800 MHZ
Ade Silvia Handayani, Nasron Nasron, Rivaldo Arviando, Abu Hasan, Sopian Soim
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191 - 197
Analysis of the application of polluted groundwater treatment technology using shell-based activated carbon media filters
Dedy Khaerudin, Ardi Hidayat
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198 - 204
Real-time detection of fruit ripeness using the YOLOv4 algorithm
Widyawati Widyawati, Reni Febriani
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205 - 210
The effect of composition and shape variations on compressive strength slag depressant
Bening Nurul Hidayah Kambuna, Soesaptri Oediyani, Della Izzaty Salman, Kusnadi Kusnadi
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211 - 216
Microencapsulation of red ginger oleoresin in maltodextrin and carrageenan using spray drying
Jayanudin Jayanudin, Retno Sulistyo Dhamar Lestari, Aldi Fathurohman, Seta Dewo
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217 - 222
Leaching Cu from e-waste PCB using thiourea solution and oxidizing H2O2
Tiara Triana, Soesaptri Oediyani, Rindang Puspa Rini, Tio Aji Pamungkas
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223 - 227
Monitoring and assembly of internet of things-based solar power plants
Ikhsan Romli, Muhammad Arif Hidayat, Candra Naya
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228 - 234
Inventory management of 50 kg packaged cement products with a lot sizing ratio (case study: XYZ warehouse)
Annisa Sherina Rahmadhani Hasibuan, Wahyuda Wahyuda, Farida Djumiati Sitania
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235 - 240
Tolerance assay of Pb resistant bacteria isolated from water of Ciujung River
Fajri Ikhsan, Syarif Abdullah, Ahmad Shulhany, Dwi Isyana Achmad, Agusutrisno Agusutrisno, Hanif Fauzan Nadif, Ummul Mughfiroh
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241 - 245
Evaluation of resilience modulus of polymer-modified asphalt mixture using gypsum filler
Dwi Esti Intari, Rindu Twidi Bethary
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246 - 249
Identification of implementation and understanding of health and work safety with hazard and operability study (Hazop) method at SMG Mulya Factory
Tri Wisudawati, Wahyu Adhi Saputro
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250 - 254
Optimization of supply and demand of bread sales as an over production solution in Hani Cake and Bakery
Riska Dwi Oktalia, Hanif Awandani, Magister Alfatah Kalijaga
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255 - 261
Rainwater harvesting system planning and design (Case study: Female dormitory building, Campus E Untirta Sindangsari)
Restu Wigati, Rama Indera Kusuma, Fahrus Sabri
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262 - 271
Making duck bone meal as a source of calcium using the sidrap protein hydrolysis technology from poultry-based conventional food processing waste
Nurul Qisti, Rukmelia Rukmelia, Zulfatun Najah, Elsa Windiastuti, Monalisa Ibrahim, Putri Nurul Hikmah
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272 - 276
Comparative analysis of increasing CBR value of soil with adding bamboo leaf ash
Woelandari Fathonah, Dwi Esti Intari, Enden Mina, Rama Indera Kusuma, Eryani Siti Maryam
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277 - 280
Energy analysis study of coal tar distillation process by feed splitting method
Wahyudi Eko Pratomo, Sri Agustina, Teguh Kurniawan
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281 - 288
The utilization of lime and plastic sack fiber for the stabilization of clay and their effect on CBR value
Enden Mina, Woelandari Fathonah, Rama Indera Kusuma, Ina Asha Nurjanah
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289 - 294
Analysis resistance and flow patterns of hull catamaran axe bow for tourism boat
Romadhoni Romadhoni, Budhi Santoso, Bobi Satria, Supriyadi Supriyadi
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295 - 300
Effect of flood risk management methods on urban flooding: Article review
Oryza Lhara Sari, Rossana Margareth Kadar Yanti, Ardiansyah Fauzi, Angel Maria Patricia Patabang
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301 - 308
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