Judul: Developing Full Stack Web-Based E-commerce Application Kang Poksu using Extreme Programming Methodology
Abstrak: Stunting, berat badan rendah, dan anak sangat kurus (wasting) terus memengaruhi anak-anak usia balita di Indonesia. Konsumsi susu rendah pada batita diduga menyumbang masalah stunting. Tujuan umum dari penelitian ini adalah mempermudah masyarakat untuk membeli susu dan popok secara online maupun pickup online sehingga turut membantu UMKM untuk memperluas jangkauan dalam menjual produknya. Metode yang digunakan dalam pengembangan aplikasi Kang Poksu adalah metode agile dengan Extreme Programming (XP). XP memiliki serangkaian aturan dan praktik yang dilaksanakan dalam empat tahap: planning, design, coding, testing, release. Hasil dari penelitian ini adalah sebuah aplikasi full stack e-commerce berbasis web bernama Kang Poksu. Aplikasi ini berisi produk produk susu dan juga popok bayi serta dewasa untuk dijual. Dengan adanya Kang Poksu, masyarakat dapat membeli produk susu dan popok secara online ataupun pickup online. Aplikasi Kang Poksu dibuat dalam dua iterasi. Bahasa pemrograman yang digunakan adalah Go serta PostgreSQL sebagai basis datanya. Aplikasi ini masih mempunyai kekurangan yaitu pada saat transaksi, penjual masih harus mengeceknya secara manual.
Keyword: e-commerce, extreme programming, full stack, small and medium-sized  enterprises

Judul: Pembangunan Prototipe Sistem Aplikasi Mobile Pedagang Sayur Keliling dengan Pendekatan Experiential Marketing
Abstrak: Penggunaan aplikasi e-commerce di Indonesia untuk membeli bahan pokok terus meningkat dari waktu ke waktu dan semakin digemari ketika pandemi terjadi, kemudahan produk yang langsung sampai di depan rumah menjadi alasan aplikasi ini diminati. Sayangnya pelanggan tidak bisa berinteraksi langsung dengan produk yang mereka inginkan bila hanya melalui layar smartphone. Sebaliknya, pedagang sayur keliling bisa memberikan pengalaman tersebut untuk pelanggan tetapi kehadirannya yang tidak menentu menyulitkan pelanggan untuk berbelanja. Penelitian ini bertujuan untuk membangun prototipe sistem aplikasi mobile pedagang sayur keliling sehingga masyarakat bisa berbelanja dengan berinteraksi langsung dengan produk secara efisien. Aplikasi ini telah dikembangkan dengan framework React Native dan sudah diuji oleh empat client. Setelah dua iterasi pengembangan dengan metode prototyping, aplikasi sudah memenuhi seluruh kebutuhan yang diinginkan client dan harapannya bisa diterapkan sebagai model bisnis baru antara pelanggan dan pedagang sayur keliling di Indonesia., The utilization of e-commerce applications in Indonesia for buying daily needs is getting higher day by day and even more popular during the pandemic, convenient products delivery to the customer’s front door becomes a reason why these applications are loved. Unfortunately customers cannot directly interact with the products they want through a smartphone screen. On the other hand, vegetable peddlers are able to give this experience to customers but their uncertainty to be present makes it difficult for customers to shop. This research’s objective is to develop a mobile application prototype system for the vegetable peddler so people can shop by interacting directly with the products efficiently. These applications have been developed using React Native framework and have been tested by four clients. After two iterations of development with prototyping methods, applications have fulfilled all requirements which clients want and hopefully can be implemented as a new business model between customers and vegetable peddler in Indonesia.
Keyword: experiential marketing, prototyping, React Native, vegetable peddler

Judul: Pemurnian dan karakterisasi protein inhibitor RNA helikase virus hepatitis C
Abstrak: Hepatitis C virus (HCV) infection is the second most common chronic viral infection in the world with global prevalence. This infection is contribution to chronic hepatitis and liver cirrhosis, often leading to hepatocellular carcinoma. There is no effective drug and vaccine available against HCV. The current standard treatment, a combination of pegylated interferon-α with ribavirin, is limited by its suboptimal response rate in a significant patient population, side effects, and affordability. Therefore, development of effective drug is needed. One approach to find out the candidate of antiviral drug is to discover the inhibitor of enzyme that essential for virus replication, such as RNA helicase. Streptomyces chartreusis 5-095 produce the inhibitor of HCV RNA helicase. The aim of this study was to purify the protein inhibitor which has inhibition activity against ATPase activity of RNA helicase HCV from S. chartreusis 5-095. The supernatant of culture S. chartreusis 5-095 exhibited high inhibiton activity against ATPase activity of RNA helicase HCV (approximately 72%) at 10 days of incubation. The extracellular protein inhibitor was partially purified by procedures of precipitation with ammonium sulfate to 65% saturation and gel filtration (Sephadex G50) using methanol water solution (4:6) as an eluen. The purity of protein inhibitor was monitored by SDS PAGE. The protein inhibitor showed a relative molecular mass were estimated to be 14 kDa and increased the purity 23,08 fold than those of the crude protein. The specific activity and IC50 after purification were 13,1338 U/mg and 0,0767 mg/mL, respectively. The activity of purified protein inhibitor showed its stability over pH range from 5-8 and optimum at pH 7,4. The inhibition activity showed its stability up to 70% at temperature 100 oC. The purified protein inhibitor relatively stable its activity at storage in the range of -20 oC to room temperature for 35 days.
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