Dengue Hemorrhagic Fever (DHF) in Central Java Province is in the second position after East Java-based on mortality rates and Temanggung District is one of the areas in Central Java, which is in high endemic status. The level of dependence of DHF in an area can be influenced by DHF in other adjacent areas. The spread of this disease through mosquito bites from one place to another depends on the presence of the cases and the vector of Aedes sp. This study aimed to identify factors related to the clustering pattern of DHF cases in Temanggung, Central Java. This study used a cross-sectional design and was carried out in the Kandangan Health Center Work Area, Temanggung District. The sample of this study was the houses of all DHF cases in 2020 as many as 60 houses with the research variables: the existence of Aedes sp., vector breeding sites, population density, and time of occurrence. This study uses clustering analysis in the form of the Average Nearest Neighbor (ANN) test with =0.05. The results showed that the factors related to the case-grouping pattern in the Kandangan Health Center Work Area were the presence of Aedes sp., vector breeding sites, high population density, and peak dengue cases that occurred in January and February. The results of this study can be used to determine priority areas in controlling dengue cases in an area.
<p>Digital elevation model (DEM) is an important element used to represent surface of The Earth. Generally, DEM has been utilized in many geographic science, for instance cartography, hydrology, geology, and remote sensing. It has been widely used since the advanced of technology in remote sensing. This research concerned to assess the vertical accuracy of SRTM v.4 and ASTER GDEM v.2. Topographic or also known as RBI map of Padang City, West Sumatera which has scale 1:10.000 was used as a reference map. RBI has 2.5 m vertical accuracy and 0.5 mm horizontal accuracy. Moreover, to gain the bias value, root mean square errors (RMSE) assessment was used to calculate the different value between them. Point height would be obtained through sampling method based on the distribution of land-use, slope, and relief. Land-use was classified digitally using maximum likelihood method from SPOT 6 imagery, slope and relief that were derived based on the reference map. Vertical accuracy assessment for both DEM was necessary in order to know the bias elevation prior to using them in a research or project. Assessment of DEM vertical accuracy also could help to generate contour in global region which should be used after the bias vertical was applied.</p>Keywords: SRTM v.2, ASTER GDEM v.2, DEM Generation, Accuracy Assessment, RBI Map
AbstrakBerbagai metode dapat digunakan untuk membangun model matematika dari masalah transportasi. Salah satu model yang dapat digunakan adalah model linier. Beberapa penelitian telah menggunakan model linier untuk mendapatkan jadwal dan rute optimal dari perjalanan bus kota. Pada penelitian ini akan dibangun model matematika dari masalah bis kota di DIY dengan menggunakan model linier. Model linier dibangun untuk mendapatkan kondisi tingkat kepadatan penumpang bis kota pada masing -masing shift yaitu pagi, siang, dan sore hari. Setelah menemukan model yang sesuai, diaplikasikan pada data penumpang bis kota di DIY. Dari hasil tersebut kondisi saat ini sudah optimum ditinjau dari tingkat kepadatan, karena kondisi bis kota pada saat ini yang sepi peminat. Dari hasil tersebut tingkat kepadatan yang optimum pada masing-masing shift pada pagi hari adalah 11 penumpang, siang hari 10 penumpang, dan sore hari 9 penumpang.. Kata kunci: masalah transportasi, model linear, rute optimal, kepadatan Abstract Various methods can be used to construct a mathematical model of the transportation problems. One model that can be used is a linear model. Several studies have used a linear model to get the schedule and the optimal route of bus trips. This research will build a mathematical model of a city bus transportation problems in DIY using linear models.Linear model is built to get the condition density city bus passengers on shifts respectively that morning, noon, and evening. After finding a suitable model, applied to the bus passengers data in Yogyakarta. From these results it can be seen the optimum conditions in terms of density, because the condition of the city bus at this time that quiet enthusiasts. Besides, the optimum density at each shift in the morning is 11 passengers, 10 passengers during the day, and evening 9 passengers.
Kelebihan dari turbin angin poros horizontal yaitu efisiensinya lebih tinggi dibanding turbin angin poros vertikal karena sudu selalu bergerak lurus terhadap arah angin dan menerima daya sepanjang putaran. Tujuan dari tugas akhir ini dibuat untuk mengembangkan tugas akhir tahun 2018 dengan memvariasikan jumlah sudu yaitu 9, 12, dan 15 dan membandingkan kinerja turbin angin dengan menggunakan variasi kecepatan angin. Metode yang digunakan yaitu dengan melakukan tahap penelitian berupa merancang, membuat, dan merakit turbin angin. Turbin angin memiliki dimensi panjang sudu sebesar 650 mm, lebar sisi masuk 60 mm, dan lebar sisi keluar 80 mm. Sedangkan hub memiliki diameter 68,8 mm dan tinggi kerangka 1,5 m. Variabel penelitian meliputi variasi jumlah sudu yaitu 9 buah, 12 buah, dan 15 buah. Data dari hasil pengujian ini kemudian dibuat tabel dan dibandingkan dengan menganalisa grafik karakteristik putaran dan efisiensi. Tahap akhir dari pengujian ini yaitu untuk mendapatkan efisiensi sistem terbaik dengan variabel yang digunakan. Nilai efisiensi pada sudu 9 yaitu sebesar 1,41% pada kecepatan angin 5,15 m/s, pada sudu 12 yaitu sebesar 2,59% pada kecepatan angin 5,58 m/s, dan pada sudu 15 yaitu sebesar 2,68% pada kecepatan angin 5,7 m/s
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