Judul: Development of Spatial Data Management System for Toll Road Assets (Case Study of Bakauheni-Terbanggi Besar Toll Road Section)
Abstrak: Jalan tol merupakan infrastruktur yang memegang peranan penting dalam meningkatkan kesejahteraan ekonomi, sehingga aset-aset yang terkait dengan jalan tol perlu dikelola dengan baik. Kini, pengelolaan aset jalan tol dinilai sulit karna masih dilakukan secara manual dengan data yang sangat banyak. Salah satu solusinya adalah dengan menggunakan suatu Road Asset Management System (RAMS) berbasis geospasial yang dapat mempermudah pengelolaan aset jalan tol secara digital. RAMS telah dikembangkan di berbagai negara, namun di Indonesia sendiri penerapannya masih sangat minim. Penelitian ini bertujuan untuk memperbaiki, melengkapi, dan mengintegrasikan basis data RAMS yang sudah ada pada penelitian sebelumnya dan mengimplementasikannya pada suatu sistem manajemen aset jalan tol sederhana. Data yang digunakan merupakan data spasial dan non-spasial aset jalan tol ruas Bakauheni-Terbanggi Besar. Sistem dikembangan menggunakan Y-Model Webgis Methodology (YWDM) dengan bahasa pemrograman HTML, PHP, JavaScript, dan CSS. RAMS yang dikembangkan berupa sebua WebGIS yang terhubung dengan REST API data aset jalan tol dan dapat menampilkan visualisasi aset jalan tol pada peta online OpenStreetMap, menambahkan aset baru menggunakan file GeoJSON, mencari dan melihat rincian aset, serta melihat rekap aset dalam bentuk grafik. Data aset seperti identifikasi jalan, ramp, akses, rambu jalan, lampu jalan, dan lainnya dengan total 51 tabel data spasial dan 31 tabel data non-spasial tersimpan dalam basis data PosgreSQL. Pengguna yang dapat mengakses sistem ini terbagi atas dua peran, yaitu admin yang dapat mengelola aset seperti pemerintah pusat, pemerintah daerah, BPJT, dan BUJT. Serta publik yang hanya dapat melihat visualisasi dan detail aset. Pengujian fungsionalitas yang dilakukan menunjukkan bahwa sistem dapat berjalan dengan baik., Toll roads are infrastructure that plays an important role in improving economic welfare, so assets related to toll roads need to be managed properly. Now, the management of toll road assets is considered difficult because it is still done manually with a lot of data. One solution is to use a geospatial-based Road Asset Management System (RAMS) that can facilitate the management of toll road assets digitally. RAMS has been developed in various countries, but in Indonesia itself the application is still very minimal. This research aims to improve, complete, and integrate the existing RAMS database in previous studies and implement it in a simple toll road asset management system. The data used is spatial and non-spatial data of the Bakauheni-Terbanggi Besar toll road assets. The system was developed using Y-Model Webgis Methodology (YWDM) with HTML, PHP, JavaScript, and CSS programming languages. RAMS developed in the form of a WebGIS connected to the REST API of toll road asset data and can display visualization of toll road assets on OpenStreetMap online maps, add new assets using GeoJSON files, search and view asset details, and view asset recaps in graphical form. Asset data such as road identification, ramps, access, road signs, street lights, and others with a total of 51 spatial data tables and 31 non-spatial data tables are stored in the PosgreSQL database. Users who can access this system are divided into two roles, namely admins who can manage assets such as the central government, local governments, BPJT, and BUJT. As well as the public who can only see visualizations and
Keyword: Manajemen Aset, Basis Data Spasial, Jalan Tol, YWDM

Judul: Designing Spatial Data and Technical Data on Toll Roads for a Web-Based Geographic Information System (WebGIS) on Toll Roads
Abstrak: Sistem informasi geografis berbasis web (WebGIS) pada jalan tol merupakan sistem yang dikembangkan untuk memvisualisasikan data vektor dan data teknik berdasarkan atribut dari data leger jalan tol. Sistem ini diharapkan dapat membantu Badan Pengatur Jalan Tol (BPJT) untuk membuat, mengelola, serta menyajikan informasi pada data yang terdapat pada kartu leger jalan tol agar lebih terintegrasi. Penelitian ini dilakukan untuk merancang data spasial dan data teknik pada leger jalan tol yang akan digunakan untuk mengembangkan sistem informasi geografis berbasis web (WebGIS) pada data jalan tol ruas Bakauheni - Terbanggi Besar. Penelitian ini menggunakan framework Codeigniter 3.1.11 yang memanfaatkan PostgreSQL dari modul back-end dengan tambahan esktensi PostGIS serta Geoserver untuk menjalankan database yang mengandung informasi spasial. Sistem ini akan dibuat dengan metode prototyping dengan lima tahap yaitu komunikasi, perencanaan cepat, pemodelan desain cepat, pembangunan prototipe, dan penyebaran, pengiriman, dan umpan balik. Hasil dari penelitian ini adalah rancangan data leger untuk WebGIS jalan tol yang diharapkan dapat memberi informasi mengenai data spasial dan data teknik pada leger jalan tol dan dapat mendigitalisasi kartu leger jalan tol., Web-Based Geographic Information System (WebGIS) on toll roads is a system developed to visualize vector data and technical data based on attributes of toll road leger data. This system is expected to help the Indonesia Toll Road Authority (BPJT) to create, manage, and present information on the data contained in the toll road leger card so that it is more integrated. This research was conducted to design spatial data and technical data on the toll road leger which will be used to develop a Web-Based Geographic Information System (WebGIS) on the Bakauheni - Terbanggi Besar toll road data section. This study uses the Codeigniter 3.1.11 framework that utilizes PostgreSQL from the back-end module with the addition of PostGIS and Geoserver extensions to run databases containing spatial information. This system will be made using a prototyping method with five stages, namely communication, rapid planning, rapid design modeling, prototype development, and deployment, delivery, and feedback. The result of this research is leger data design for toll road WebGIS which is expected to provide information about spatial data and technical data on toll road legers and can digitize toll road leger cards.
Keyword: Toll Road, Road Asset Management, WebGIS, Prototyping

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