Judul: Pengembangan Aplikasi Mobile E-Commerce di Sisi Customer pada Koperasi RPPI dengan Metode Prototyping.
Abstrak: Koperasi Rumah Peradaban Pelajar Indonesia (RPPI) merupakan salah satu koperasi di Bogor yang dibentuk pada tahun 2017. Koperasi ini melakukan usaha jual beli produk dengan sistem pre-order yang disuplai dari berbagai macam supplier RPPI atau yang dikenal dengan marketplace. Penjualan produk dilakukan menggunakan media online messenger. Proses penjualan dilakukan dengan mengirimkan informasi daftar barang dan formulir pemesanan secara manual melalui WhatsApp. Penelitian ini berfokus pada pengembangan aplikasi e-commerce berbasis mobile di sisi customer pada platform Android menggunakan framework Flutter, bahasa pemrograman Dart, dan RDBMS MySQL. Metode yang digunakan adalah metode prototyping sebanyak dua iterasi. Penelitian ini berhasil mengembangkan aplikasi e-commerce berbasis mobile yang mengakomodasi customer untuk melakukan pemesanan produk, pencarian produk, mendapatkan konfirmasi barang yang tersedia, hingga menyelesaikan transaksi. Seluruh fungsi yang dikembangkan berhasil diuji kepada klien dengan metode blackbox. Akan tetapi, beberapa hal perlu dilakukan seperti menambahkan fitur notifikasi, fitur chat, dan sinkronisasi fitur promosi antara aplikasi customer dan aplikasi admin.
Keyword: e-commerce, koperasi, marketplace, mobile, prototyping

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: Thermal Characteristics and Dynamics of Tropical Cyclone over Western North Pacific Ocean: A Case Study of Typhoon Songda (Chedeng) 2011
Abstrak: The frequent occasion of Tropical Cyclone (TC) over Western North Pacific (WNP) Ocean lies from 10˚N to 26˚N and 121˚E to 170˚E. Sources of TC development come from warm ocean temperature where latent heat is released during condensation processes and subsequently concentrated in the boundary layer. Relative humidity at 850-700 hPa is responsible to produce the most intense storm. Meanwhile, weak vertical wind shear between 850-200 hPa is one of the dynamical factors that lead to the development of TC. Pressure level of 850-200 hPa is chosen to minimize the thermodynamic effect in the lower troposphere. Typhoon Songda (Chedeng in the Philippines) or TSC lasted from May 18th to 30th, 2011 and strengthened into powerful Super Typhoon stage between May 24th and 27th. Long curving track and the exhibition of all sequences of TC life cycle, TSC is then considered as an ideal case of TC. The objective of the study with case of TSC is to investigate the role of thermal characteristics and dynamics on TC intensity. The research is carried out by using Advanced Research of Weather Research and Forecasting model (WRF ARW model) version 3.3. Two domains are employed in the model. The first domain situate from 02˚N to 40˚N and 118˚E to 149˚E and cover spatial resolution () of 33.1 km. The second domain situate from 09˚N to 27˚N and 119˚E to 132˚E with of 11 km. Timestep of the model () is 120 seconds. The model is supported by the following physical parameterization, i.e., Yonsei University Scheme (YSU) in the boundary layer, Kain-Fritsch scheme (KF) in the cumulus, and WRF Single-Moment 3-class scheme in the microphysics. Initial meteorological condition prior to the formation of the cyclone is generated using WRF ARW standard-release model. Sensitivity of the model output is obtained from a selected single-parameter change scenarios, namely, 10 % to 20 % decrease and increase of wind shear initial data at 850-200 hPa, and by 10 % to 20 % decrease of relative humidity initial data at 850-700 hPa. The result showed that the negative correlations between wind shear and intensity are found in wind shear scenarios. Wind shears of 10 ms-1 which lead to strengthening of the wind intensity in the early period of Typhoon development are found in wind shear scenarios. The effect of wind shear changes on wind intensity is statistically significant in the 20 % wind shear scenarios. During mature stage, weak wind intensity occurred when wind shear increase as given in the WRF standard-release and the 20 % decreasing scenario. Different situation is found in the 20 % increasing scenario where wind shear tend to weak and lead to strong wind intensity at this stage. Meanwhile, the reduction of moisture supply at 850-700 hPa resulting from 20 % decreasing relative humidity play a major role in the weakening of wind intensity and reduces mechanical energy of the cycle process as much as 300 J kg-1.
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