Judul: Kasus Smp Tamansiswa, Jakarta Pusat
Abstrak: Criminal News on TV could influence audiences and had made changed in many aspects such as cognitive, affective, and behavioral. This research only confine on cognitive and affective. The objective to know audience’s exposure of criminal news on TV, to identify the factors which related with audience’s exposure of criminal news on TV, to identify cognitive effect and affective that will be confine in adolescent as consequence of the audience’s exposure of criminal news on TV, and analyze relationship between audience’s exposure of criminal news on TV and cognitive effect and affective that will be confine in adolescent as consequence of the audience’s exposure of criminal news on TV. The research held on SMP Tamansiswa, Jl Garuda No.25, Kebayoran, Jakarta Pusat, on Mei 2009. Population are adolescent who is student, 13rd and 14th years old include eight grade of junior high school. Sample (58 subjects) was selected by cluster random sampling method. The results showed that 1) subjects didn’t have preference with kind of criminal news that they were watched on TV. They watched criminal news on TV frequently (<5 times for a week) with sufficient duration (<15 minutes; 15-25 minutes). (2) Audience’s exposure of criminal news on TV didn’t relate with Personal Characteristics (age, gender, and achievement of academic), but only motive for watching was proofed related with kind of criminal news. Social characteristic that was related with audience’s exposure of criminal news on TV is occupation of mother. (3) Criminal news on TV causes effect in audiences at medium level on cognitive and affective aspects with balance proportion. (4) Exposure of criminal news on TV in adolescent didn’t relate with cognitive aspect, but it has relationship with affective aspect. There were relationship among frequency for watching and violence of tolerant.
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Judul: Hubungan Terpaan Media Televisi dengan Belajar Kognitif pada Anak (Kasus SDN 04 Dramaga, Bogor Jawa Barat)
Abstrak: This research was conducted in SDN 04 DRAMAGA Bogor, West Java. Method that was used to determine the respondents was Startified Random Sampling. Method used to analyze the data is average scores and Structural Equation Modeling (SEM). The average score was used to describe the individual characteristics, sosial environment, psychological factors, exposure to television and cognitive learning in children. SEM was used to determine the relationship between individual characteristics and sosial environment with television exposure and the relationship between sosial environment, psychological factors and exposure to the medium of television with the child’s cognitive learning. In this study, the medium of television exposure in children is high but low cognitive learning. There was a significant relationship (p <0,05) between individual characteristics and sosial environment with television exposure in children. There is also a significant relationship (p <0,05) between sosial environment and exposure to the medium of television with the child's cognitive learning. In reversal, there was not any significant relationship (p <0,05) between the cognitive psychology factors to learning in children. Keywords: television, children, media exposure
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Judul: Perbaikan Proses Pemurnian Gliserol Hasil Samping Industri Biodiesel Menggunakan Distilasi Vakum
Abstrak: Gliserol dari hasil samping industri biodiesel minyak sawit setiap tahun jumlahnya kian meningkat. Gliserol tersebut umumnya hanya memiliki kadar gliserol 40-50% karena masih banyak mengandung pengotor berupa sisa metanol, sisa katalis, asam lemak, air, maupun bahan pengotor lainnya sehingga perlu ditingkatkan kemurniannya agar dapat digunakan di berbagai industri dan meningkatkan nilai jualnya. Salah satu cara yang digunakan untuk memurnikannya adalah dengan penambahan asam fosfat yang dapat meningkatkan kadar gliserol dari 47% menjadi 83%. Penelitian ini bertujuan untuk mendapatkan kondisi proses pemurnian gliserol (±80%) menggunakan metode distilasi vakum untuk menghasilkan gliserol dengan kadar lebih tinggi (±90%). Kondisi terbaik proses pemurnian gliserol melalui metode distilasi vakum adalah pada suhu 90-95°C dan tekanan 15 InHg (0,51 Bar) dengan kecepatan pengadukan 300 rpm selama 2 jam. Kondisi tersebut menghasilkan gliserol dengan kadar gliserol 94,19%, kadar air 0,01%, kadar abu 2,96%, kadar MONG 2,84%, densitas 1,261 gr/cm3, specific gravity 1,264, viskositas 214 cP, viskositas kinematis (40°C) 106 cSt, warna kuning kecoklatan, pH 6,2, bilangan asam 3,88 mg KOH/g sampel, titik didih 110°C, titik nyala >140°C, titik tuang -30°C, dan titik awan -21°C. Hasil ini menunjukkan bahwa suhu yang digunakan pada proses distilasi vakum telah memberikan pengaruh yang signifikan terhadap karakteristik gliserol murni yang dihasilkan.
Keyword: gliserol, biodiesel, minyak sawit