Ekstrak kulit buah naga mengandung banyak antioksidan yang dapat menghambat radikal bebas. Penambahan ekstrak ke dalam sabun padat dapat meningkatkan aktivitas antioksidan. Penelitian ini bertujuan untuk mengetahui pengaruh komposisi ekstrak terhadap sifat sabun padat (pH dan aktivitas antioksidan). Komposisi ekstrak dan waktu reaksi bervariasi pada 1 sampai 1,5% berat dan 20 hingga 40 menit, masing-masing. Ekstrak diperoleh dengan metode maserasi diikuti dengan proses penguapan, untuk menghilangkan etanol (EtOH) yang tersisa. Sabun padat dibuat dengan mereaksikan Virgin Coconut Oil (VCO) dengan natrium hidroksida (NaOH) dan beberapa aditif. Sabun padat diproses dengan metode saponifikasi proses panas. Hasil penelitian menunjukkan bahwa sabun padat mengandung pH 8,29 – 10 dan aktivitas antioksidan dalam konsentrasi penghambatan (IC50) dengan nilai 215,27 - 1671,33 ppm. Ini menunjukkan bahwa sabun padat dengan waktu saponifikasi 20 menit dengan ekstrak 1,5% berat memiliki hasil terbaik sesuai dengan SNI 3532: 2016.
<p><em>This research is performed in order to test the influence of the Operation Expenses to Operations Income (BOPO), Non Performing Loan (NPL), Net Interest Margin (NIM), and Loan to Deposit Ratio (LDR) toward Profitability of Commercial Banks in Indonesia Period 2012-2017. </em></p><p><em> The sample used is 7 Commercial Banks that entered into the list of Commercial Banks Business Activities 2012-2017. The independent variables in this research are BOPO, NPL, NIM, and LDR. While the dependent variable is Profitability which is represented by Return On Assets (ROA). The analysis model used in this research is Multiple Linear Regression, while the analysis technique in this research using F Statistic Test, t Statistic Test, and Determination Coefficient Test. </em></p><em> The results of this research show that BOPO and NIM have significant influence to Profitability, while NPL and LDR have not significant influence to Profitability. Based on result of regression analysis, it is obtained that Adjusted R<sup>2</sup> is 0,906, meaning the contribution of independent variable in explaining the dependent variable is 90,6% and the rest that is 9,4% is influenced by other variable not examined in this research.</em>
Purpose This study proposes to adopt joint application design (JAD) in the requirement gathering process on developing a knowledge management system (KMS) using Fernandez methodology. It is proposed that Fernandez methodology produces only a list of KMS features and the requirement of the feature is still unclear. This study aims to produce KMS that meets the needs and expectations of users based on features of Fernandez's methodology. Design/methodology/approach This study was conducted using a combination methodology that combines Fernandez methodology to identify the feature needs of the organization and JAD to identify user requirements of KMS. The system prototype is evaluated by measuring user satisfaction using the Post Study System Usability Questionnaire. Findings The results of this study indicate that with the adoption of JAD it is possible to get the requirement in accordance with the expectations of the user. In addition, this study also shows that the level of user satisfaction with the prototype developed with the requirement is high at 84% of the maximum score. Research limitations/implications This study was used only in the education context, especially teaching assistant problems at the Faculty of Computer Science, University of Indonesia. For this reason, further research is needed for different contexts so that the implementation of this combination of methods can be generalized more broadly. Practical implications This paper provides practical implications for the development of KMS by identifying user requirements using JAD. Originality/value This paper provides a combination method to generate KMS that meets user requirements.
Tujuan dari penelitian ini adalah untuk mengetahui perngaruh Debt to Equity Ratio (DER), Return On Equity (ROE) dan Earning Per Share (EPS) terhadap Harga Saham. Data diperoleh dari Annual Reportyang diterbitkan oleh Bursa Efek Indonesia dengan periode 2009-2017. Bank yang dijadikan sampel penelitian ini adalahBank Badan Usaha Milik Negara yang terdaftar di Bursa Efek Indonesia periode 2009-2017. Teknik analisis yang digunakan dalam penelitian ini adalah analisis regresi linier berganda untuk memperoleh gambaran yang menyeluruh mengenai hubungan antar variabel satu dengan variabel lainnya. Berdasarkan hasil pengujian hipotesis dengan menggunakan uji simultan (F) statistik menyimpulkan bahwa ketiga variabel bebas (DER, ROE, dan EPS) secara simultan berpengaruh signifikan terhadap variabel terikat, yakni Harga Saham. Demikian juga secara parsial, dimana ketiga variabel tersebut berpengaruh signifikan. Nilai R 2 sebesar 0.801 yang diperoleh menunjukkan bahwa 80.1% dari perubahan nilai Harga Saham dipengaruhi oleh variabel bebas dalam penelitian, dan sisanya sebesar 19.9% dipengaruhi oleh variabel lain di luar model.
<p>Instalasi Pengolahan air (IPA) Solear merupakan salah satu fasilitas penting dalam memenuhi kebutuhan air. IPA Solear PDAM Tirta Kerta Raharja Kabupaten Tangerang berkapasitas 100 lt/detik. Tujuan dari penelitian ini adalah mengevaluasi kinerja unit operasi dan proses IPA Solear dan memberikan rekomendasi optimalisasi berdasarkan hasil evaluasi. Tahapan pada penelitian ini meliputi evaluasi kondisi IPA eksisting dan memberikan rekomendasi hasil evaluasi dan analisa kualitas hasil produksi IPA Solear. Hasil dari evaluasi debit maksimum intake 350 l/detik, koagulasi 720 l/detik, flokulasi 200 l/detik, sedimentasi 130 l/detik dan filter 220 l/detik sehingga, IPA Solear yang optimum dapat dilakukan dengan penggunaan debit maksimum yaitu 130 l/detik.<br />Kata Kunci: IPA, Evaluasi IPA, Optimalisasi IPA</p>
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