Recently, the global population has increased sharply, unfortunately, the availability of fossil fuel resources has significantly decreased. This phenomenon has become an attractive issue for many researchers in the world so that various studies in the context of finding renewable energy are developing continuously. Relating to this challenge, this research has been part of scientific work in the context of preparing an energy briquette employing palm oil stems and glycerol crude of biodiesel byproducts as inexpensive and green materials easily found in the Riau province, Indonesia. Technically, the palm oil stems are used for the production of charcoal particles and the glycerol crude as an adhesive compound in the production of energy briquettes. The heating value of palm oil stem is 17,180 kJ/kg, which can be increased to an even higher value through a carbonization process followed by a densification process so that it can be used as a potential matrix to produce energy briquettes. In detail, this study was designed to find out several parameters including the effect of sieve sizes consisting of 60, 80, and 100 mesh, respectively, which are used for the preparation of charcoal particles as the main matrix for the manufacture of the briquettes; the effect of charcoal-adhesive ratios (wt) of 60:40, 70:30, and 80:20; and the effect of varied pressures of 100, 110, and 120 kg/cm2 on the briquette quality. The quality of the obtained briquettes is analyzed through the observation of important properties which involve the heating value and the compressive strength using Response Surface Methodology (RSM). The results showed that the produced briquettes had an optimum heating value of 30,670 kJ/kg, while their loaded charcoal particles resulted from the mesh sieve of 80, in which there was a charcoal loading of 53 g and it pressed at 93.1821 bar, whereas, the compressive strength value of the briquette was 100,608 kg/cm2, which loaded charcoal particles from the mesh sieve of 100, the charcoal-adhesive ratio of 53:47 (wt) and the pressure of 93.1821 bar.

ABSTRAK. Penelitian ini bertujuan untuk mengetahui model peramalan dimana jumlah keberangkatan penumpang pada PT. Angkasa Pura II (Perseron). Kantor cabang bandar udara Internasional Iskandar Muda dengan menggunakan Metode Seasonal Autoregresive  Integrated Moving Average (SARIMA). Data jumlah keberangkatan di bandar udara Internasional Iskandar muda merupakan data dengan pola musiman. Data yang digunakan merupakan data sekunder yang diperoleh dari Bandara Sultan Iskandar Muda periode Bulan Januari 2010 hingga Desember 2016. Model terbaik yang diperoleh yaitu ARIMA (0,1,1)(0,0,1)12. Sedangkan berdasarkan data peramalan yang diperoleh dapat diketahui bahwa diprediksi jumlah penumpang pesawat tetinggi pada tahun 2017 akan terjadi pada Bulan Desember, dan jumlah penumpang pesawat terendah diprediksikan akan terdapat pada Bulan Maret 2017. Kesimpulan akhir yang diperoleh yaitu jumlah penumpang pada Tahun 2017 akan mengalami peningkatan dibandingkan dengan Tahun sebelumnya.ABSTRACT. This study aims to determine the model of forecasting where the number of passengers at PT. Angkasa Pura II (Perseron). International branch of Iskandar Muda International Airport using Seasonal Autoregresive Integrated Moving Average (SARIMA) method. Data on the number of departures at Iskandar International Airport are young data with seasonal patterns. The data used are secondary data obtained from Sultan Iskandar Muda Airport during January 2010 to December 2016. The best model is ARIMA (0,1,1) (0,0,1)12. While based on forecasting data obtained can be seen that predicted the number of passengers in 2017 will occur in December, and the lowest number of passengers is predicted to be in March 2017. Final conclusion obtained that the number of passengers in the Year 2017 will increase compared with the previous Year.

Indonesia telah mengalami banyak kejadian bencana alam, Badan Nasional Penanggulangan Bencana mencatat bahwa dari tahun 2016 sampai dengan awal 2018 sudah lebih dari 2.700 bencana alam terjadi di seluruh wilayah Indonesia. Oleh karena itu penelitian ini bertujuan untuk mengelompokkan wilayah di Indonesia menurut intensitas terjadinya bencana alam, sehingga diketahui wilayah yang rawan terjadi bencana alam. Analisis yang digunakan adalah Analisis Gerombol dengan Metode K-Means. Hasil yang didapatkan adalah jumlah optimal cluster yang dapat dibentuk yaitu 2. Kesimpulan dari penelitian ini, cluster pertama merupakan wilayah yang rawan terjadinya bencana alam dengan anggotanya adalah Provinsi Jawa Timur, Jawa Barat, dan Jawa Tengah. Sedangkan 31 provinsi lainnya tergolong dalam cluster kedua, yang dalam artian bukan daerah rawan terjadinya bencana alam. Kesimpulan ini diambil berdasarkan nilai rataan dari masing-masing cluster, dimana rata-rata setiap variabel pada cluster pertama lebih besar dibandingkan nilai rataan setiap variabel pada cluster kedua.

No abstract

In Aceh, oyster hunting is mostly carried out by women, by sitting or squatting inside the estuary water. The job is carried out every day for many years, with an average duration of two until three hours/day. During this activity, the female genital organ is an open cavity which is an entry point of substances into the body. The residential drainage channels in Banda Aceh City, consists of Alue Naga and Krueng Tibang Rivers Furthermore, the water quality of the Krueng Cut river is in class III, and it contains coliform bacteria, fecal coliform, and streptococcus fecal bacteria. However, the oysters extracted contain lead, cadmium, and zinc, which are above the safety level. The purpose of this study was to determine the effect of age, and duration of work using vaginal douches on pap smear result test in woman oyster seekers. The research subjects comprised of 60 respondents, which was obtained by purposive random sampling. The result showed that 75% of the respondents in abnormal category (PAP II), had pap smear results. A total of 39 respondents (65%) were in the reproductive age, with 35 (58.3%) of them having worked for more than five years, while 25 (41.7%) did not utilize the vaginal douching after work. Furthermore, it influences the age of Pap smear results (p-value=0.00), the length of work affecting the pap smear result test (p-value=0.00), and the vaginal douching that influences the pap smear results (p-value=0.001). Logistic regression analysis showed that the most influential variable on Pap smear results was the length of work (p-value=0.005) and vaginal douching utilized (p-value=0.002), with its results not affecting by age.