Judul: REST API Based Backend Development on Integrated Fish Auction Application
Abstrak: Application Programming Interface (API) adalah sebuah abstraksi yang dibuat oleh pengembang sehingga fungsi-fungsi di dalam sistem dapat diakses melalui program komputer. Representational State Transfer (REST) adalah arsitektur pengembangan API yang menggunakan Hypertext Transfer Protocol (HTTP) untuk pertukaran data. Penelitian ini mengimplementasikan REST dalam mengembangkan API sebagai back-end dari Aplikasi Pelelangan Ikan Terintegrasi. API yang dikembangkan menggunakanan Javascript Object Notation (JSON) sebagai format standar dari komunikasi data dan JSON Web Token (JWT) sebagai autentikasi. Penelitian ini menunjukkan pengembangan API berhasil dilakukan menggunakan metode scrum yang terdiri dari 4 sprint dan 17 product backlog untuk fitur autentikasi, pencatatan serta rekap hasil tangkapan, hasil lelang, dan transaksi serta fitur laporan dan dashboard., Application Programming Interface (API) is an abstraction built by developer so functions of the system can programmatically be accessed. Representational State Transfer (Rest) is an API development architectural style that uses Hypertext Transfer Protocol (HTTP) for data communication. This research implemented REST in developing API as the back-end of Integrated Fish Auction Application. API was developed using Javascript Object Notation (JSON) as standard format for data communication and JSON Web Token (JWT) as authentication. This research indicates that the development of API successfully performed using scrum method that consists of 4 sprints and 17 product backlogs for authentication, record and recap for fish caught, auction, and transaction data and also reporting and dashboard feature
Keyword: back end, fish auction, REST API, scrum

Judul: Pengembangan Frontend pada Aplikasi Pelelangan Ikan Terintegrasi berbasis Progressive Web  App
Abstrak: Data perikanan rutin dikumpulkan melalui Tempat Pelelangan Ikan (TPI) untuk membantu pemerintah melakukan perencanaan dan evaluasi pengembangan produksi perikanan. Namun, pengumpulan data di TPI masih dilakukan secara konvensional. Hal tersebut menyebabkan proses pengumpulan data menjadi tidak efisien. Penelitian ini membahas pengembangan Aplikasi Pelelangan Ikan Terintegrasi bagian frontend untuk membantu pengelolaan data aktivitas di TPI. Sistem dibuat menggunakan metode scrum dan berbasis progressive web app untuk mendukung fleksibilitas penggunaannya di berbagai platform. Tampilan yang berhasil dibuat dalam penelitian ini adalah tampilan untuk mencatat tangkapan ikan, mencatat hasil lelang ikan, mencatat transaksi pembelian, rekap data, laporan, dan dashboard. Data tangkapan ikan dan hasil lelang akan dicatat oleh petugas TPI, sedangkan data transaksi akan dicatat oleh kasir. Data tersebut kemudian akan diproses menjadi laporan produksi ikan dan laporan transaksi lelang yang dapat diakses oleh Admin TPI dan Dinas perikanan. Sistem diharapkan dapat mempermudah Petugas TPI mengumpulkan data aktivitas TPI dan membantu pemerintah untuk mengambil keputusan., Fishery data is collected through the Fish Auction Place (TPI) to assist the government in planning and evaluating the development of fisheries production. However, data collection at the fish auction is still done manually. This causes an ineffective data collection process. This study discusses process the Integrated Fish Auction Application development from the frontend side to manage activity data at TPI. The system was developed using the scrum method and made based on a progressive web app to support the flexibility of its use on various platforms. The interface that was successfully created in this study is a page view to record fish catches, record auctions, record transactions, recap data, reports, and dashboard. The data on fish catches and auction results will be recorded by TPI officers, while transaction data will be recorded by the cashier. All the data then will be processed into fish production reports and auction transaction reports which can be accessed by the TPI admin and the fisheries office. The system is expected to make it easier for fish auction officers to collect data and assist the government in making decisions.
Keyword: perikanan, progressive web app, scrum, tempat pelelangan ikan

Judul: Hybrid solar cells of ZnO nanoparticles/chlorophyll was modified metal ions (Zn2+ and Cu2+ )
Abstrak: Zinc Oxide (ZnO) is a n-type semiconductor with a wide the energy band (Band Gap) is 3.37 eV at room temperature and 3.34 eV at low temperature with a large exiton binding energy is 60 meV. ZnO has been synthesized by hydrothermal method, resulting in a decrease in particle size over the duration of the hydrothermal changes. Crystallographic structure of ZnO were characterized using XRD, has shown the characteristic pattern of a hexagonal wurtzite structure, the crystallite size increases to changes in particle size. Changes in particle size has also led to a change in the absorption peak of ZnO as has been demonstrated posted under test using the optical properties of UV-Vis spectrophotometer. Changes of this uptake has also led to changes in the energy band gap, which increases its band gap energy of the particle size. In electronic applications, especially in solar cells. Chlorophyll is considered less effective, because of their very nature are easily degraded as a result of several reactions which are acid, lighting and temperature. The results of the stability test using a halogen lamp 34 W/m2 for 5 hours, that the substitution of chlorophyll with metal ions Zn2+ and Cu2+ has been shown to form more stable than natural chlorophyll. The characterization of the optical properties, the combination of ZnO / chlorophyll in the form of hybrid films has led to a shift in the absorption region of ZnO becomes more widely from the UV to Visible. ZnO/chlorophyll has absorption range of 350-515 nm, ZnO / Zn-feofitin 332-401 nm and 332-632 nm for Cu-feofitin. The combination of ZnO/chlorophyll and CuSCN as a solid electrolite in hybrid solar cell, a modified chlorophyll with metal ions Zn2+ and Cu2+ has been shown to form a more stable I-V curve. It is characterized by its fill factor value greater than natural chlorophyll. Nevertheless, solar cells with natural chlorophyll has been able to produce higher efficiency values of chlorophyll were substituted.
Keyword: Hydrothermal, ZnO/Chlorophyll modified, Hybrid Solar Cell