Judul: Web-based Geographic Information System of Unmanned Aerial Vehicle (UAV) Imagery for Agricultural Land Management
Abstrak: Manajemen informasi pertanian terdiri dari lahan dan komoditas yang dibudidayakan membutuhkan pengelolaan secara sistematis dan terstruktur. Salah satu metode yang dapat digunakan adalah dengan menerapkan Sistem Informasi Geografis. Salah satu informasi yang dapat disajikan adalah citra Unmanned Aerial Vehicle (UAV) yang merupakan tangkapan dari kamera. Namun demikian pengelolaannya belum optimal, sehingga diperlukan sistem untuk mengelola informasi tersebut. Penelitian ini bertujuan untuk melakukan rancang bangun Sistem Informasi Geografis citra UAV untuk pengelolaan lahan pertanian berbasis web di Kabupaten Muaro Jambi, Provinsi Jambi, Indonesia. Metode penelitian terdiri atas tahapan analisis sistem, pengambilan data citra UAV, desain sistem, dan implementasi sistem. Hasil dari penelitian ini adalah prototipe sistem informasi geografis citra UAV lahan pertanian berbasis web yang dapat bekerja dengan baik., Management of agricultural information consisting of cultivated land and commodities requires systematic and structured management. One method that can be used is by implementing a Geographical Information System. One of the information that can be presented is the image of the Unmanned Aerial Vehicle (UAV) which is a capture from the camera. However, the management is not optimal, so a system is needed to manage the information. This study aims to design a UAV image Geographic Information System for web-based agricultural land management in Muaro Jambi District, Jambi Province, Indonesia. The method was used in this research was the System Development Life Cycle that consists of system analysis, data collection, design, and implementation. The result of this research is a web-based geographic information system prototype of agricultural land UAV images.
Keyword: geographic information system, UAV imagery, web

Judul: Pengembangan Sistem Informasi Geografis Pengelolaan Kebun Kelapa Sawit
Abstrak: Peningkatan produksi minyak kelapa sawit pada periode tahun 2000 hingga 2019 mendapatkan kritik dari organisasi internasional yang disebabkan pertanian tidak berkelanjutan. Pengimplementasian pertanian presisi menjadi solusi untuk pertanian berkelanjutan pada perkebunan kelapa sawit. Implementasi pertanian presisi pada kelapa sawit yakni pada manajemen tanaman. Manajemen tanaman dapat dilakukan dengan pengawasan tanaman. Jumlah pohon pada kebun perlu dihitung untuk memperkirakan hasil panen, jumlah pupuk, hingga penyulaman. Perhitungan pohon secara manual memiliki biaya yang tinggi, kerja yang intensif, dan tingkat kesalahan yang tinggi. Oleh karena itu penggunaan unmanned aerial vehicle (UAV) atau UAV diperlukan. Citra gambar UAV dapat diolah menjadi peta. Peta ini dapat dijadikan data pendukung dalam pengelolaan kebun. Namun, masih diperlukan sistem informasi geografis (SIG) berbasis website untuk dapat menyajikan data-data tersebut dengan baik. Penelitian ini dilakukan dengan membuat sistem informasi geografis berbasis website. Pengembangan website diawali dengan analisis sistem, akuisisi citra UAV, pengolahan citra UAV, desain sistem, implementasi sistem dan pengujian sistem. Berdasarkan compatibility test, sistem dapat berjalan pada software dan device pada umumnya dan nilai System Usability Scale (SUS) sebesar 57,50 yang artinya sistem cukup diterima oleh pengguna., The increase in palm oil production in the period 2000 to 2019 received criticism from international organizations due to unsustainable agriculture. Implementation of precision farming is a solution for sustainable agriculture in oil palm plantations. The implementation of precision agriculture in oil palm is in crop management. Plant management can be done with plant supervision. The number of trees in the garden needs to be counted to estimate yields, the amount of fertilizer, and the replanting. Manual tree calculation is costly, labor intensive, and high error rate. Therefore the use of an unmanned aerial vehicle (UAV) or UAV is required. UAV images can be processed into maps. This map can be used as supporting data in plantation management. However, a website-based geographic information system (GIS) is still needed to be able to present these data properly. This research was conducted by creating a website-based geographic information system. Website development begins with system analysis, UAV image acquisition, UAV image processing, system design, system implementation and system testing. Based on the compatibility test, the system can run on software and devices in general and the System Usability Scale (SUS) value is 57,50, which means that the system is quite acceptable to users.
Keyword: palm oil, precision agriculture, UAV, web-GIS

Judul: Characterizations of low alloy steel sae 4422  plated with chromic acid (Cro3)
Abstrak: Characterizations of low alloy steel SAE 4422 plated with chromic acid (CrOrO3) was use Optical Microscopy (OM), Scanning Electron Microscopy (SEM), X-Ray Diffraction (XRD), RD),Energy Dispersive Analysis of X-Ray (EDAX), Hardness Test and Roughness Test. Microstructures analysis exhibits cracks and grain boundaries microcracks as a characteristics of chrome metal found at plating metal. Perlite and Ferrite as grains of steel found at base metal with grain boundaries around it. Phase analysis of plating metal appropriate to chrome metal with lattice constant (a) is 2.559 Å and phase analysis of base metal appropriate to iron ferrite with lattice constant (a) is 3.318 Å. Both plating and base metal have cubic system. Chemical analysis of plating metal at surface section exhibits that cracks area have highest value of carbon element compare with grains and grains boundaries area. While chemical analysis of base metal at cross section exhibits that perlite have highest value of carbon element compare with ferrite and grain boundaries. The hardness value of plating metal at surface section and cross section are 753 and 637 VHN. While, the hardness value of base metal and interface area at cross section are 205 and 373 VHN. The roughness value at measurement points of chrome surface for as received sample are 0.445 μm. Observation used Optical Microscopy and Scanning Electron Microscopy exhibits surface irregularities combine to form surface texture of plating metal at surface section.
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