Judul: Rancang Bangun Autonomous UAV Berjenis Quadcopter dengan Mikrokontroler Pixhawk
Abstrak: Unmanned Aerial Vehicle (UAV) adalah sebuah perangkat terbang yang dapat dikendalikan dari jarak jauh dengan remote control atau secara otomatis dengan autopilot Pixhawk. Salah satu jenis dari UAV adalah quadcopter. Quadcopter merupakan sebuah multicopter yang memiliki empat motor penggerak. Saat ini, kendali pergerakan quadcopter menjadi topik yang banyak diteliti. Penelitian-penelitian tersebut membutuhkan data terbang yang akurat dan dapat mewakili seluruh kemungkinan kondisi terbang quadcopter. Namun saat ini belum ada yang menyediakan data terbang quadcopter. Penelitian ini bertujuan untuk membangun dua buah quadcopter dan memperoleh data terbang kedua quadcopter. Pengambilan data dilakukan dengan membangun dan menerbangkan dua quadcopter dengan spesifikasi berbeda secara otomatis dengan rute kotak dan lingkaran. Data terbang diambil menggunakan perangkat lunak Mission Planner. Kemudian, data terbang difilter dan disinkronisasi satu sama lain dengan menggunakan data yang memiliki time sampling paling besar. Penelitian ini telah berhasil membangun autonomous quadcopter dengan spesifikasi berbeda. Rata-rata mean square error pergerakan sebesar 6.79×10-10 untuk quadcopter F450 dan 1.45×10-8.
Keyword: autonomous, data terbang quadcopter, quadcopter, UAV, autonomous, data terbang quadcopter, quadcopter, UAV

Judul: Classification of Unmanned Aerial Vehicle Flight using k-Nearest Neighbor Algorithm
Abstrak: Salah satu Pesawat Udara Nir Awak (PUNA) yang banyak digunakan untuk berbagai aplikasi saat ini adalah PUNA berjenis Quadcopter. Pada aplikasi tertentu yang terkait dengan analisis data terbang terkadang diperlukan penentuan apakah quadcopter sedang berada pada posisi take off, hover, atau landing, berdasarkan kecepatan perputaran keempat motor quadcopter. Penentuan mode terbang quadcopter ini dapat dilakukan dengan menggunakan persamaan matematis. Namun, pengklasifikasian secara matematis tersebut cukup kompleks dan memerlukan waktu komputasi yang tinggi. Untuk mengatasi hal ini, penelitian ini bertujuan untuk mengklasifikasikan kombinasi keempat kecepatan rotor quadcopter menjadi mode terbang quadcopter yaitu take-off, hover, dan landing menggunakan pemodelan dengan k-Nearest Neighbor. Data yang digunakan diambil dari uji terbang quadcopter berjenis F450 dan F330. Hasil pemodelan menunjukkan bahwa model dengan nilai akurasi terbaik diperoleh untuk sikap take- off pada quadcopter berjenis F450 untuk nilai k = 1 dengan nilai akurasi sebesar 96% dan pada quadcopter berjenis F330 untuk nilai k = 1 dengan nilai akurasi sebesar 89%., One of the Unmanned Aerial Vehicle (UAV) types which is widely used for various applications today is the Quadcopter. In certain applications related to flight data analysis, it is often necessary to determine if the quadcopter is in a take-off, hover, or landing position, based on the rotational speeds of the four quadcopter motors. Classification of this quadcopter modes can be done using mathematical equations, but this approach is quite complex and requires high computational time. To address this issue, this study aims to classify the combination of the four rotor speeds of the quadcopter into flying modes, namely take-off, hover, and landing using k-Nearest Neighbor classifier. The data used is taken from the flight test of the F450 and F330 quadcopter types. The modeling results show that the best model for accuracy result was obtained for take-off behavior with k = 1 for both quadcopter models with the accuracy of 96% for F450 quadcopter and 89% for the F330 quadcopter.
Keyword: knn, uav, quadcopter, drone, sensor

Judul: Pengaruh Jumlah Bahan Pretanning dan Minyak Biji Karet (Hevea brasiliensis) Terhadap Mutu Kulit Samoa. Di
Abstrak: Animal hides or skins are the most valuable by product of the meat industry. Most of those hides are converted into leather by leather tanning process. Chrome based tanning is the most popular tanning process. At the chrome based tanning process, a lot of amount chrome are throw away into the environment that make a significant effect to the biological and ecological environment damaged. Due to concerns over the use and disposal of chromed tanned leather, the leather industry is now facing increasing scrutiny over its use of chrome as tanning agent. The use of non-chrome tannages has gradually become pre-eminent to producing leather, particularly in the European automotive leather markets. Chamois leather is one of leather product. It is produced from animal hides/skins by oil tanning process, usually with fish oil. High price and odour problems to the chamois leather that produced using fish oil motivate to do some research to solve that problems. Rubber seed oil is an oil that predicted can substitute fish oil. Pretanning process is needed to increase the oil penetration and protects the pelt from putrefying during oxidation periods (Khrisnan et al., 2005). Relugan GT 50 is the agent that used on this research. Relugan GT 50 is an aldehyde tanning agent, produced by BASF. This research was aimed to find out the effects of Relugan GT 50 concentration (offer) and rubber seeds (Hevea brasiliensis) oil to the chamois leather’s quality. Beside that, this research is also aimed to decide the best combination of the factors to produce chamois leather also to know the chamois leather characteristics. The preliminary research was carried out by analyzing the rubber seed’s kernel and eggshell as well as physico-chemical properties of the rubber seed oil. The main research was done by tanning the skin with Relugan GT 50 in concentrations of 1.5, 3.0 and 4.5% followed by rubber seed oil concentrations of 10, 20, and 30%. The experimental design used was completely randomize factorial design. The preliminary research shows that rubber seed’s kernel was 49% and rubber seed’s eggshell was 51%. The rubber seed’s oil characterstics were density of 0.94 (g/cm3), viscosity of 48,4 centistokes, colour of 2713 PtCo units, inodine value 113 g iod/ 100 g, peroxide value of 24 miliequivalent/1000 gram oil, acid value of 15 mg KOH/g oil and FFA content of 5.8%. The research shows that Relugan GT 50 concentration significantly affected shrinkage temperature (Ts) and pH; rubber seed oil concentration significantly affect the organoleptic properties of the leather. The optimum conditions for the tanning were Relugan GT of 3.0% concentration and 10% rubber seeds oil. The physical properties of the leather were shrinkage temperature of 75oC, thickness of 0.92 mm, tensile strength of 21.50 N/mm2, elongation at break of 144%, tear strength of 55.77 N/mm, water absorption of 266% (2 hours) and 299% (24 hours). The chemical properties were oil content of 2.5%, ash content of 1.2% and pH of 8. The organoleptic properties were softness of 7–8, colour of 8-9, and odour of 8-9.
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