Use of Condensate Combined with Hydrocking Palm Oil Products for Improving the Quality of Premium

A research about hydrocracking of Crude Palm Oil (CPO) has been conducted using the catalyst Cr/active natural zeolite. Hydrocracking of CPO was conducted at the temperature variations of 300 oC, 400 oC, 500 oC and 600 oC to determine the optimum temperature based on the density and viscosity of the product of hydrocracking. Hydrocracking of CPO was also varied with the weight of catalysts 0.5 g, 1 g, 1.5 g, 2 g and 2.5 g using an optimum temperature. Products of hydrocraking were vacuum distilled and calculated for the percentage of area products and gasoline fractions. The results showed the optimum temperature at 400 oC the optimum weight of catalyst was 2.5 g with percentage of product was 1.2779 % and the area fraction of gasoline 469.953. Nature additives obtained from hydrocracking products at the optimum conditions blended with premium and condensate to see how it influences on octane number change. Nature additives added to premium increase the octane number from 87.4 to 87.8, while the addition of condensate lower the octane number

PENGEMBANGAN PROGRAM PENGHITUNGAN LUAS TANAH DENGAN METODE POLIGON DAN INTEGRASI NUMERIK POLINOMIAL BERBASIS KOORDINAT GPS

Tanah merupakan suatu sumber daya alam berupa ruang yang dapat digunakan untuk melakukan berbagai aktifitas kehidupan. Pengukuran luas tanah selalu mengandung ketidakpastian, dimana semakin berkembangnya teknologi dalam bidang pengukuran luas tanah hanya meminimalisir kesalahan dan tidak dapat menghilangkan kesalahan dalam pengukuran luas tanah. Metode poligon adalah salah satu metode untuk menghitung luas tanah menggunakan data berupa titik koordinat, dimana unsur kelengkungan permukaan bumi diabaikan untuk menghitung luas suatu daerah. Integrasi numerik polinomial dapat digunakan untuk menghitung luas suatu area, tidak terlepas dari interpolasi, dimana interpolasi dapat menjadikan data titik koordinat menjadi suatu fungsi yang dapat diintegrasikan sehingga didapatkan hasil luasan dari suatu area. Kedua metode digunakan untuk menghitung luas area Universitas Syiah Kuala, Kantor Gubernur Aceh, dan Komplek Panteriek. Hasil penghitungan yang dihasilkan dibandingkan untuk mengetahui metode terbaik dalam penghitugan luas dengan banyak data dan kondisi data yang terbatas. Dari hasil penghitungan luas tanah Komplek Panteriek menggunakan integrasi numerik polinomial lebih baik dibandingkan dengan metode poligon, dikarenakan penentuan titik pada area komplek panteriek memiliki jarak tertentu antara titik satu dan titik selanjutnya, dan tidak terdapat dua titik y dalam satu nilai x.Kata kunci : Pengukuran luas, Metode poligon, Integrasi Numerik, Interpolas

Estimation of secondary soil properties by fusion of laboratory and on-line measured vis-NIR spectra

Visible and near infrared (vis-NIR) diffuse reflectance spectroscopy has made invaluable contributions to the accurate estimation of soil properties having direct and indirect spectral responses in NIR spectroscopy with measurements made in laboratory, in situ or using on-line (while the sensor is moving) platforms. Measurement accuracies vary with measurement type, for example, accuracy is higher for laboratory than on-line modes. On-line measurement accuracy deteriorates further for secondary (having indirect spectral response) soil properties. Therefore, the aim of this study is to improve on-line measurement accuracy of secondary properties by fusion of laboratory and on-line scanned spectra. Six arable fields were scanned using an on-line sensing platform coupled with a vis-NIR spectrophotometer (CompactSpec by Tec5 Technology for spectroscopy, Germany), with a spectral range of 305-1700 nm. A total of 138 soil samples were collected and used to develop five calibration models: (i) standard, using 100 laboratory scanned samples; (ii) hybrid-1, using 75 laboratory and 25 on-line samples; (iii) hybrid-2, using 50 laboratory and 50 on-line samples; (iv) hybrid-3, using 25 laboratory and 75 on-line samples, and (v) real-time using 100 on-line samples. Partial least squares regression (PLSR) models were developed for soil pH, available potassium (K), magnesium (Mg), calcium (Ca), and sodium (Na) and quality of models were validated using an independent prediction dataset (38 samples). Validation results showed that the standard models with laboratory scanned spectra provided poor to moderate accuracy for on-line prediction, and the hybrid-3 and real-time models provided the best prediction results, although hybrid-2 model with 50% on-line spectra provided equally good results for all properties except for pH and Na. These results suggest that either the real-time model with exclusively on-line spectra or the hybrid model with fusion up to 50% (except for pH and Na) and 75% on-line scanned spectra allows significant improvement of on-line prediction accuracy for secondary soil properties using vis-NIR spectroscopy

ANALISIS YURIDIS SOSIOLOGIS DAN KRIMINOLOGIS TERHADAP KEJAHATAN SEKSUAL TERHADAP ANAK DALAM RUMAH TANGGA (Studi di Polres Kabupaten Malang Unit Ruang Pelayanan Khusus Perempuan dan Anak di Kepanjen)

Penulisan tugas akhir ini mengambil permasalahan yang sekaligus menjadi obyek penelitian adalah Apakah yang menjadi faktor penyebab terjadinya kejahatan seksual yang dilakukan terhadap anak dalam rumah tangga? Bagaimana upaya Polri dalam menangani kejahatan kekerasan seksual yang dilakukan terhadap anak dalam rumah tangga?\ud Penelitian ini bertujuan untuk mengetahui faktor penyebab terjadinya kejahatan kekerasan seksual terhadap anak dalam rumah tangga, Untuk mengetahui upaya kepolisian dalam menanggulangi kejahatan kekerasan seksual terhadap anak dalam rumah tangga, Sebagai syarat penulisan tugas akhir/skripsi dalam menempuh gelar kesarjanaan di Fakulktas Hukum Universitas Muhammadiyah Malang. Metode pendekatan yang digunakan adalah yuridis sosiologis yang berarti penelitian terhadap pokok permasalahan hukum, akan dilakukan secara sosiologis atau memperhatikan aspek dan pranata sosial lainnya dan kriminologis dalam arti pengumpulan fakta-fakta tentang kejahatan dan pelaku kejahatan dan penanggulangan kejahatan.\ud Penelitian ini menemukan data bahwa faktor penyebab terjadinya kejahatan seksual terhadap anak dalam rumah tangga adalah terdiri dari dua faktor yaitu faktor dari dalam diri pelaku (intern) dan dari luar diri pelaku (ekstern), upaya yang dilakukan pihak kepolisian melalui usaha preventif

ANALISIS PENGARUH KUALITAS LAYANAN, CITRA MEREK, DAN KEPERCAYAAN TERHADAP KEPUTUSAN PEMBELIAN MELALUI NILAI YANG DIPERSEPSIKAN SEBAGAI MEDIASI PADA TOKO ONLINE LAZADA.CO.ID (Studi pada Konsumen Lazada.co.id Kota Semarang)

The technological advances of the modern era led to the increasing penetration of internet users in the world, including Indonesia. This raises increased competition in the business world. This trend caused the emergence of the internet online stores. It is becoming the alternative choice in shopping for consumers. Consumers are not only able to shop in an offline store that requires out of the house, but now with the internet connection consumers can shop from home. It encourages the offline store to follow developments and make its own online store. But in fact the Indonesian people are still hesitant to purchase online. This phenomenon is evidenced by the data that showing of the 20 people there is only one person who bought at the online store, it is lower than offline stores where 20 people are at least 2 people are buying. For the online stores need to know how to increasing consumer purchasing decisions. The purpose of this study was to see how much influence service quality and brand image on perceived value and purchasing decision, and the influence of perceived value and trust towards purchasing decision This study is conducted to consumers who make purchases online at lazada.co.id, where respondents are Semarang people. The samples in this study were 200 respondents. The method of collecting data through questionnaires. The method of data collected through questionnaires. The sampling method in this study is a non-probability sampling with purposive sampling technique. This study uses analytical techniques of Structural Equation Model (SEM), which is estimated by AMOS 21.0. The Result show that the service quality and brand image has a positive and significant effect on perceived value. Service quality, brand image, trust and perceived value has a positive and significant effect on purchasing decision