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All Journal Indonesian Journal of Pure and Applied Chemistry International Research on Big-data and Computer Technology (IRobot) Chemical Engineering Journal Storage (CEJS) Indonesian Journal of Chemical Engineering
Widyaningrum, Sri Rahayu
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Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Engineering Materials Science & Nanotechnology

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PENGARUH TEKNOLOGI INFORMASI TERHADAP ASURANSI KESEHATAN DI INDONESIA TAHUN 2017 Junaidi, Edi; Islami, Muhammad Reza Redo; Hanifah, Windia; Widyaningrum, Sri Rahayu
International Research on Big-Data and Computer Technology: I-Robot Vol 9, No 1 (2025): April
Publisher : UNIVERSITAS DHARMA WACANA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53514/ir.v9i1.635

Abstract

Asuransi kesehatan adalah penjanjian antara dua belah pihak yang memiliki ikatan dan pertanggung jawaban antara penyelenggara atau pengelola dana premi dari peserta dan penerima dalam pelayanan kesehatan. Berdasarkan laporan Survei Sosial Ekonomi Nasional tahun 2017 terdapat 40,59% tidak memiliki jaminan kesehatan. Dimana terdapat ada 6 provinsi yang masih dibawah 40% kepesertaan jaminan kesehatan. Penelitioan ini bertujuan  mengetahui pengaruh teknologi informasi terhadap kepemilikan asuransi kesehatan di Indonesia dengan desain cross sectional, dimana data yang digunakan merupakan Data SUSENAS 20217 dari Badan Pusat Statistik Indonesia. Hasil analisis bivariat menunjukkan 4 variabel independen (pekerjaan, penggunaan handphone, kepemilikan handphone, dan penggunaan internet) yang berhubungan terhadap Kepemilikan Asuransi Kesehatan. Variabel pekerjaan kategori bekerja dengan nilai OR terendah sebesar 0,98. Hasil analisis multivariat yang paling berhubungan adalah variabel penggunaan internet. Hal tersebut dapat dilihat dari nilai p-value 0,000, variabel penggunaan internet dengan kategori tidak menggunakan internet memiliki OR tertinggi sebesar 1,27. Variabel paling berhubungan dengan kepemilikan asuransi kesehatan adalah variabel penggunaan internet dengan nilai OR tertinggi (1,27). Hasil penelitian ini dapat memberikan rekomendasi kebijakan kepada pemerintah untuk terus berupaya meningkatkan kajian peran teknologi informasi terhadap asuransi kesehatan.  
The Utilization of Nickel Slag and Oyster Shell to Improve the Concrete Strength Selang, Sartika S.; Maryudi, Maryudi; Mufrodi, Zahrul; Widyaningrum, Sri Rahayu
Indonesian Journal of Chemical Engineering Vol. 2 No. 2 (2024)
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26555/ijce.v2i2.1021

Abstract

The increasing mining industry activity will produce increasing industrial waste. Nickel slag is one of the wastes produced from the nickel refining process by-products that have not been optimally utilized. The chemical composition of nickel slag is mostly silica with a percentage of 47.93%. Silica can be used as a material for making concrete, where a high percentage of silica is expected to strengthen the concrete structure. This study was conducted to determine the effect of nickel slag on the compressive strength of concrete and the right composition in the concrete mixture. The research method used an experimental method with different nickel slag compositions (0%, 5%, 10%, 15%, and 20%) with concrete compressive strength testing at the age of 28 days. The results of the concrete compressive strength test were that the higher the nickel slag content, the higher the compressive strength and flexural strength of the concrete. The addition of shells with different variations (0%, 5%, 10%, 15%, and 20%) showed that the best results were with the addition of 10% shells with a compressive strength of 28.1 MPa. Meanwhile, the water absorption capacity with the lowest absorption power was obtained by adding 20% ​​nickel slag, which was 8.95 %.
Penyisihan Cadmium dalam Sintesis Air Limbah Industri dengan Proses Adsorpsi Batch Menggunakan Zeolit Alam Widyaningrum, Sri Rahayu; Faizatin Nadya Roza; hanifah, windia; assalami, Abrar
Chemical Engineering Journal Storage (CEJS) Vol. 5 No. 05 (2025): Chemical Engineering Journal Storage (CEJS)-October 2025
Publisher : LPPM Universitas Malikussaleh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/cejs.v5i05.23567

Abstract

Kadmium merupakan logam berat yang paling berbahaya karena tidak dapat terurai secara hayati namun keberadaannya saat ini banyak ditemukan pada air limbah industri. Kadmium dapat dilepaskan ke lingkungan melalui aliran limbah cair yang biasanya mengalir ke sungai dengan baku mutu yang tidak sesuai untuk lingkungan sekitar, sehingga diperlukan penelitian dalam penyisihan logam berat terlarut. Metode adsorpsi merupakan salah satu metode yang dapat dilakukan untuk mengurangi pencemaran logam berat. Penelitian ini dilakukan dengan adosrpsi batch yang bertujuan untuk mengetahui kesetimbangan adsorpsi menggunakan adsorben zeolit alam. Data kesetimbangan yang digunakan adalah dengan menggunakan model isoterm Langmuir dan isoterm Freundlich, didapatkan bahwa isoterm Freundlich lebih dominan dibandingkan dengan sisoterm Langmuir dengan nilai koefisien determinasi (R2) adalah 0,997, kapasitas adsorpsi pada permukaan zeolit alam terhadap logam kadmium sebesar 1,618942 mg/g serta nilai n sebesar 2,437484. Efisiensi Penyisihan Kadmium mengalami kenaikan seiring dengan penambahan massa zeolit alam yang disebabkan bertambahnya luas permukaan yang belum menjerap kadmium dengan persentasi penyisihan tertinggi adalah 99,948 %
STUDY OF REACTION TEMPERATURE EFFECTS ON THE YIELD AND QUALITY OF BIODIESEL SYNTHESIS FROM WASTE PALM OIL Roza, Faizatin Nadya; Widyaningrum, Sri Rahayu; Alvita, Livia Rhea; Rezki, Amelia Sri
Indonesian Journal of Pure and Applied Chemistry Vol 8, No 2 (2025)
Publisher : Tanjungpura University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/indonesian.v8i2.96780

Abstract

Biodiesel is one of the alternative renewable energy resources to petroleum diesel. It has gained significant attention due to its biodegradability, lower emissions, and compatibility with existing diesel engines. Usually, producing biodiesel requires a reaction called transesterification. It is the most popular way to turn oils into biodiesel. It basically involves mixing triglycerides with alcohol and a catalyst. Reaction temperature is one of the most important factors that impact the transesterification process. The research investigated how the different reaction temperatures could affect biodiesel's quality and physicochemical results synthesized from waste palm oil. The subject of the research was temperature treatment divided into five groups, which were 50 °C, 55 °C, 60 °C, 65 °C, and 70 °C. A quantitative method was implemented to analyze biodiesel quality from waste palm oil. The quantitative data from biodiesel production were the yield and its byproduct, as well as the percentage level of the free fatty acid (FFA) as a result of physicochemical analysis of biodiesel. The result of the research was that the optimum temperatures to produce biodiesel synthetically were 55 °C and 60 °C because both had the highest biodiesel yield percentage and glycerin volume compared to other reaction temperature treatments. Additionally, all the reaction temperature treatments resulted in FFA levels under 0.5% for biodiesel products. They experienced a decline in raw material, waste palm oil, which had more than 0.75% until ~1% of FFA levels for each reaction temperature. The biodiesel's FFA levels showed that the study's biodiesel met international production standards.
Co-Authors Alvita, Livia Rhea assalami, Abrar Faizatin Nadya Roza Hanifah, Windia Junaidi, Edi Maryudi Maryudi Muhammad Reza Redo Islami Rezki, Amelia Sri Roza, Faizatin Nadya Selang, Sartika S. Zahrul Mufrodi, Zahrul