Judul: Front-End Development of Blockchain Based Shallot Supply Chain System Using Prototyping Method
Abstrak: Bawang merah (Allium ascalonicum L.) merupakan komoditas hortikultura yang memiliki angka konsumsi rumah tangga tertinggi di Indonesia. Untuk menjaga kualitas dan keamanan produk maka diperlukan pemantauan pada kualitas produk pada rantai pasok bawang merah yang dimulai dari panen benih oleh penangkar hingga sampai ke tangan konsumen. Blockchain sebagai buku besar transaksi, dapat dimanfaatkan untuk melakukan pencatatan transaksi dan penelusuran transaksi pada rantai pasok. Penelitian ini bertujuan untuk mengembangkan aplikasi front-end pada sistem rantai pasok bawang merah berbasis blockchain menggunakan library ReactJS dan REST API untuk komunikasi data. Pengembangan sistem ini dilakukan secara tim dan menggunakan metode Prototyping. Hasil dari penelitian ini merupakan progressive web app yang dapat mencatat transaksi penangkar, petani, dan pengumpul pada rantai pasok dan dapat membantu konsumen dalam melakukan penelusuran pada komoditas bawang merah yang telah diuji menggunakan metode black-box. Diharapkan pada penelitian selanjutnya dapat dilakukan penelitian pada aspek user experience pada aktor rantai pasok., Shallot (Allium ascalonicum L.) is a horticultural commodity that has the highest household consumption rate in Indonesia. To maintain the quality and safety of the product, it is necessary to monitor product quality in the shallot supply chain, starting from seed harvesting by breeders to the hands of consumers. Blockchain as a transaction ledger can be used to record and trace transactions in the supply chain. This study aims to develop a front-end on the shallot supply chain blockchain system using the React JS library and REST API for data communication. The development of this system is carried out in a team using the Prototyping method. The results of this study are progressive web app that can record the transactions of shallot breeders, farmes, and collectors in the supply chain and enables consumers to conduct searches on the shallot commodity that have been tested using black-box method. It is hoped that further studies can conduct researchs on the user experience aspect of supply chain actors.
Keyword: blockchain, front-end, prototyping, shallots, supply chain

Judul: Development of Agriblock Blockchain Platform for Traceability in Agricultural Products Supply Chain
Abstrak: Manajemen rantai pasok produk pertanian merupakan proses yang mencakup manajemen aliran informasi dan barang dari penangkar hingga ke konsumen akhir. Penerapan teknologi blockchain pada rantai pasok dapat meningkatkan nilai jual barang dan kepercayaan konsumen terhadap barang yang dibeli. Penelitian ini berfokus pada pengembangan platform blockchain Agriblock untuk meningkatkan ketertelusuran dalam rantai pasok produk pertanian, khususnya bawang merah. Platform blockchain Agriblock dikembangkan menggunakan NodeJs dengan bahasa pemrograman Typescript. Platform blockchain Agriblock yang dihasilkan terdiri atas tiga lapisan utama: infrastruktur, komputasi terdistribusi, dan platform. Lapisan infrastruktur meliputi komponen node, penyimpanan, dan jaringan pada blockchain. Lapisan komputasi terdistribusi mencakup komponen blok, transaksi, protokol konsensus, dan fungsi hash. Lapisan platform terdiri atas komponen REST API yang memfasilitasi komunikasi data dengan jaringan blockchain. Penelitian ini diharapkan dapat menjadi landasan awal dalam pengembangan platform blockchain yang difokuskan untuk manajemen rantai pasok produk pertanian., Supply chain management of agricultural products involves managing the flow of information and goods from breeders to end consumers. The use of blockchain technology in the supply chain can enhance the value of goods and increase consumer trust in the purchased products. This research focuses on the development of the Agriblock blockchain platform to improve traceability in the supply chain of agricultural products, especially shallots. The blockchain platform was developed using NodeJs with Typescript programming language. The resulting Agriblock blockchain platform consists of three main layers: infrastructure, distributed computing, and platform. The infrastructure layer includes node components, storage, and network of the blockchain. The distributed computing layer encompasses block components, transactions, consensus protocols, and hash functions. The platform layer consists of REST API components that facilitate data communication with the blockchain network. This research is expected to be an early foundation in the development of a blockchain platform that focused on agricultural product supply chain management.
Keyword: shallot, agriculture, Smallholder Palm Oil Supply Chain, traceability, blockchain

Judul: Approximation of the Median of Poisson Distribution Using the Relation of Poisson-Gamma Distribution
Abstrak: A major drawback of median is that median cannot usually be defined in closed form, even in the cases where their distribution functions are known. This study gives an approximation of the closed form for the median of the Poisson distribution by using the relation of Poisson-Gamma distribution. The approximation uses elementary techniques based on the monotonicity of certain sequences involving tail probabilities of the Poisson distribution and the Central Limit Theorem. Furthermore, a closed form expression for the mean absolute deviation 􀜧|􀜰􀰒 􀵆 􀜯􀝁􀝀􁈺􀜰􀰒􁈻| is also studied. The median is relevant because of the fact that it minimizes the mean absolute deviation of a Poisson random variable (􀜰􀰒􁈻 by considering median as central tendency.
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