Judul: Pengaruh Tipe Kepribadian dan Kelekatan dengan Teman Sebaya terhadap Perilaku Bullying Remaja di Panti Asuhan.
Abstrak: Penelitian ini bertujuan untuk menganalisis pengaruh tipe kepribadian dan kelekatan dengan teman sebaya terhadap perilaku bullying remaja di panti asuhan. Penelitian ini dilaksanakan di empat panti asuhan di Kota Bogor yang dipilih secara purposive berdasarkan rekomendasi dari Dinas Sosial Kota Bogor. Penelitian ini melibatkan 115 remaja yang tinggal di empat panti asuhan terpilih dengan kisaran usia 13 hingga 20 tahun. Pengambilan data dilakukan dengan metode self-administered dan wawancara terbuka. Hasil penelitian menunjukkan bahwa tipe kepribadian extraversion, agreeableness, dan conscientiousness berhubungan positif signifikan dengan kelekatan teman sebaya. Tipe kepribadian neuroticism berhubungan negatif signifikan dengan kelekatan teman sebaya. Tipe kepribadian agreeableness berhubungan negatif signifikan dengan perilaku bullying. Usia dan tipe kepribadian conscientiousness berpengaruh negatif terhadap perilaku bullying. Tipe kepribadian openness to experience berpengaruh positif terhadap perilaku bullying. Jenis kelamin berpengaruh signifikan terhadap perilaku bullying. Remaja laki-laki memiliki skor perilaku bullying yang lebih tinggi dibandingkan dengan remaja perempuan.
Keyword: bullying, kelekatan teman sebaya, kepribadian, panti asuhan, remaja

Judul: Tipe Kepribadian, Kelekatan Teman Sebaya, dan Perilaku Cyberbullying Remaja di Wilayah Pedesaan Kabupaten Bogor
Abstrak: Remaja merupakan kelompok usia yang mudah terpapar terhadap perubahan teknologi. Mudahnya remaja dalam beradaptasi dengan perubahan teknologi dapat membuat remaja rentan terhadap dampak negatif dari teknologi, salah satunya cyberbullying. Cyberbullying adalah perilaku bullying yang dilakukan di dunia maya dan dilakukan secara sengaja, yang berupa agresi atau tindakan yang menyebabkan orang lain merasa teraniaya atau tersakiti. Penelitian ini bertujuan untuk menganalisis pengaruh tipe kepribadian, kelekatan teman sebaya, dan perilaku cyberbullying. Penelitian ini melibatkan 61 siswa kelas XI dari dua sekolah menengah atas negeri di Kabupaten Bogor yang dipilih secara purposive. Data dikumpulkan melalui kuesioner, kemudian data dianalisis menggunakan analisis deskriptif dan inferensia. Hasil penelitian ini menunjukkan bahwa perilaku cyberbullying pada penelitian ini tergolong rendah. Lama pendidikan ayah, tipe kepribadian psychoticism dan neuroticism, serta kelekatan teman sebaya berhubungan positif dengan perilaku cyberbullying. Sementara itu, lama pendidikan ayah berpengaruh positif signifikan terhadap perilaku cyberbullying remaja. Kelekatan teman sebaya juga berpengaruh positif signifikan terhadap perilaku cyberbullying remaja.
Keyword: kelekatan teman sebaya, perilaku cyberbullying, remaja, tipe kepribadian

Judul: Process engineering of cassava pulp hydrolysis using microwave heating for ethanol production
Abstrak: Cassava pulp is a potential source of carbohydrates. In this work, characteristics of the cassava pulp were analyzed and validity of microwave irradiation for hydrolysis of carbohydrates, especially starch present in the cassava pulp, was estimated as a non-enzymatic saccharification technique. The hydrolysis was performed in water and acid medium. In addition, the role of activated carbon in the microwave-assisted hydrolysis was also evaluated. An optimization of the hydrolysis was conducted using Central Composite Design (CCD) and was analyzed using Response Surface Methodology (RSM). Fermentation of cassava pulp hydrolysates produced from microwave-assisted acid hydrolysis was performed to those added with activated carbon (25% w/w) and those without activated carbon by Saccharomyces cerevisiae. There were two types of activated carbon, which have different adsorption properties, used in this experiment. Results of the cassava pulp characterization shows that the starch granules in the cassava pulp were trapped in biomass matrices, so that the starch was harder to hydrolyze than the free starch, such as that in tapioca flour. Microwave-assisted hydrolysis of cassava pulp can be completed in less than 15 minutes in water medium, and less than 10 minutes in acid medium. The addition of activated carbon improved hydrolysis of cassava pulp starch in water medium with suppression of formation of the secondary decomposed materials. The highest glucose yield obtained from cassava pulp was 46% of dry matter or 52% of theoretical, which was about 60% higher than the one without the addition of activated carbon. On the contrary, the addition of activated carbon decreased the glucose yield when the hydrolysis was performed in acid medium (0.5% H2SO4). The glucose yield could reach 80.8% of dry matter or 91.5% of theoretical yield when no activated carbon was added in the acid medium. The estimated optimum condition for cassava pulp hydrolysis under microwave irradiation was using 0.88% sulfuric acid with 9 minutes of heating time, which resulted in 85% of theoretical glucose yield and 140 g/L glucose concentration. At the end of the fermentation the ethanol yield and concentration obtained in the samples treated with activated carbon (0.41-0.43 g ethanol / g glucose consumed; 34-35 g/L) were lower than that not treated with activated carbon or those treated with activated carbon which was added after hydrolysis (0.48 g ethanol / glucose consumed; 38- 39 g/L). However, the fermentation was completed very much faster in the hydrolysates treated with the activated carbon which has a high adsorption capacity than in that not treated with activated carbon or those treated with activated carbon of low adsorption capacity. Therefore, ethanol productivities (0.44-0.55 g/L/h) of the former were higher than the latter (0.28-0.34 g/L/h).
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