Published: June 23, 2021

Research Articles

Implementation of Minkowski-Chebyshev Distance in Fuzzy Subtractive Clustering

10.20885/EKSAKTA.vol2.iss2.art1
Annisa Eka Haryati (1), Sugiyarto Surono (2), Suparman Suparman (3)
(1) Master in Mathematics Education, Universitas Ahmad Dahlan, Yogyakarta, Indoneisa ,
(2) Mathematics Faculty of Applied Science and Technology Universitas Ahmad Dahlan Yogyakarta, Indonesia ,
(3) Master in Mathematics Education, Universitas Ahmad Dahlan Yogyakarta, Indoneisa
82-87
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540

Utilization of Cassava Processing Liquid Waste as Raw Material for Making Biodegradable Plastics with the Addition of Glycerol Plasticizer

10.20885/EKSAKTA.vol2.iss2.art2
Iswendi Iswendi (1), Iryani Iryani (2), Alpira Alpira (3), Regi Fadila Putra (4)
(1) Department of Chemistry, Faculty of Mathematics and Natural Science (FMIPA), Universitas Negeri Padang, Padang, Indonesia. ,
(2) Department of Chemistry, Faculty of Mathematics and Natural Science (FMIPA), Universitas Negeri Padang, Padang, Indonesia. ,
(3) Department of Chemistry, Faculty of Mathematics and Natural Science (FMIPA), Universitas Negeri Padang, Padang, Indonesia. ,
(4) Graduate School of Science and Engineering, Kansai University, Osaka, Japan.
88-98
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435

Hierarchical Clustering Approach for Region Analysis of Contraceptive Users

10.20885/EKSAKTA.vol2.iss2.art3
Dina Tri Utari (1), Denesa Salma Hanun (2)
(1) Department of Statistics, Faculty of Mathematics and Natural Sciences, Universitas Islam Indonesia, Jl. Kaliurang Km 14.5, Yogyakarta ,
(2) Department of Statistics, Faculty of Mathematics and Natural Sciences, Universitas Islam Indonesia, Jl. Kaliurang Km 14.5, Yogyakarta
99-108
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469

Prediction of Outstanding Claims Liability in Non-Life Insurance: An Application of Adaptive Grey Model

10.20885/EKSAKTA.vol2.iss2.art4
Mujiati Dwi Kartikasari (1), Hani’atul Maghfuroh (2)
(1) Statistics Department FMIPA Universitas Islam Indonesia, Jln. Kaliurang Km 14.5 Sleman, Yogyakarta, Indonesia ,
(2) Statistics Department FMIPA Universitas Islam Indonesia, Jln. Kaliurang Km 14.5 Sleman, Yogyakarta, Indonesia
109-115
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232

Composite of Polylactic Acid/Chitosan/Ag-Hydroxyapatite Synthesized Using Turmeric Leaves Extract-Mediated Silver Nanoparticle and Snail Shell as Antibacterial Material

10.20885/EKSAKTA.vol2.iss2.art5
Rahmania Audita (1), Khoirunisa khoirunisa (2), Hasna' Azizah Azzahra' (3), Bambang Hernawan Nugroho (4), Habibi Hidayat (5), Is Fatimah (6)
(1) Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Islam Indonesia, Kampus Terpadu UII, Jl. Kaliurang Km 14, Sleman, Yogyakarta, Indonesia ,
(2) Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Islam Indonesia, Kampus Terpadu UII, Jl. Kaliurang Km 14, Sleman, Yogyakarta, Indonesia ,
(3) Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Islam Indonesia, Kampus Terpadu UII, Jl. Kaliurang Km 14, Sleman, Yogyakarta, Indonesia ,
(4) Department of Pharmacy, Faculty of Mathematics and Natural Sciences, Universitas Islam Indonesia, Kampus Terpadu UII, Jl. Kaliurang Km 14, Sleman, Yogyakarta, Indonesia. ,
(5) Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Islam Indonesia, Kampus Terpadu UII, Jl. Kaliurang Km 14, Sleman, Yogyakarta, Indonesia ,
(6) Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Islam Indonesia, Kampus Terpadu UII, Jl. Kaliurang Km 14, Sleman, Yogyakarta, Indonesia
116-123
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434

Evaluation of Heavy Metals Concentration in Milk Products by using Atomic Absorption Spectroscopy

10.20885/EKSAKTA.vol2.iss2.art7
Nurul Auni Zainal Abidin (1), Nur Sofiah Abu Kassim Kassim (2), Sheikh Ahmad Izzadin (3), Sheikh Mohd Ghazali (4), Noor Hidayah Pungot (5), Siti Sufiana Kamni (6)
(1) ,
(2) Faculty of Applied Sciences, Universiti Teknologi MARA (UiTM), Cawangan Negeri Sembilan, Kampus Kuala Pilah, 72000 Kuala Pilah, Negeri Sembilan, Malaysia ,
(3) Faculty of Applied Sciences, Universiti Teknologi MARA (UiTM), 40450 Shah Alam, Selangor, Malaysia ,
(4) Faculty of Applied Sciences, Universiti Teknologi MARA (UiTM), Cawangan Negeri Sembilan, Kampus Kuala Pilah, 72000 Kuala Pilah, Negeri Sembilan, Malaysia ,
(5) Faculty of Applied Sciences, Universiti Teknologi MARA (UiTM), 40450 Shah Alam, Selangor, Malaysia ,
(6) Faculty of Applied Sciences, Universiti Teknologi MARA (UiTM), 40450 Shah Alam, Selangor, Malaysia
136-141
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525

Impacts of Human Development Index and Percentage of Total Population on Poverty using OLS and GWR models in Central Java, Indonesia

10.20885/EKSAKTA.vol2.iss2.art8
Duhania Oktasya Mahara (1), Achmad Fauzan (2)
(1) Statistics Department, Faculty of Mathematics and Natural Sciences Universitas Islam Indonesia, Jl. Kaliurang KM 14.5, Sleman-Yogyakarta, Indonesia ,
(2) Statistics Department, Faculty of Mathematics and Natural Sciences Universitas Islam Indonesia, Jl. Kaliurang KM 14.5, Sleman-Yogyakarta, Indonesia
142-154
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697

The Encapsulation Process of Flavonoid from Kepel Seeds (Stelechocarpus burahol)

10.20885/EKSAKTA.vol2.iss2.art9
Umi Rofiqah (1), Diora Ananda (2), Ilhamy Nurrahmah (3)
(1) Chemical Engineering Department, Universitas Islam Indonesia, Jalan Kaliurang km 14,5 Yogyakarta 55584, Indonesia ,
(2) Chemical Engineering Department, Universitas Islam Indonesia, Jalan Kaliurang km 14,5 Yogyakarta 55584, Indonesia ,
(3) Chemical Engineering Department, Universitas Islam Indonesia, Jalan Kaliurang km 14,5 Yogyakarta 55584, Indonesia
155-161
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244

Effect of Virgin Coconut Oil from Green Coconut on High-Density Lipoprotein (HDL) Levels in Blood Serum of White Mice

10.20885/EKSAKTA.vol2.iss2.art10
Iswendi Iswendi (1), Iryani Iryani (2), Regi Fadila Putra (3)
(1) Department of Chemistry, Faculty of Mathematics and Natural Science (FMIPA), Universitas Negeri Padang, Padang, Indonesia ,
(2) Department of Chemistry, Faculty of Mathematics and Natural Science (FMIPA), Universitas Negeri Padang, Padang, Indonesia ,
(3) Graduate School of Science and Engineering, Kansai University, Osaka, Japan.
162-168
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286

Review Article

Microwave and Ultrasound Irradiations for the Intensification on Biodiesel Productions: a Mini Review

10.20885/EKSAKTA.vol2.iss2.art6
Suresh Sagadevan (1), Amri Yahya (2), Is Fatimah (3)
(1) Nanotechnology & Catalysis Research Centre, University of Malaya, Malaysia. ,
(2) Chemistry Department, Universitas Islam Indonesia, Kampus Terpadu Jl. Kaliurang Km 14, Sleman, Yogyakarta, Indonesia. ,
(3) Chemistry Department, Universitas Islam Indonesia, Kampus Terpadu Jl. Kaliurang Km 14, Sleman, Yogyakarta, Indonesia.
124-135
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232