Judul: The Influence of Parenting Style and Friendship Quality on Aggressivity among Adolescents in Bogor City
Abstrak: Agresivitas merupakan kecenderungan yang mengarah pada tingkah laku individu dalam bentuk tindak kekerasan secara fisik atau verbal dan dilakukan dengan tujuan untuk melukai atau menyakiti orang lain. Penelitian ini bertujuan untuk menganalisis pengaruh karakteristik remaja, karakteristik keluarga, gaya pengasuhan, dan kualitas pertemanan terhadap agresivitas remaja di Kota Bogor. Penelitian berlokasi di empat SMA di Kota Bogor yang ditentukan secara purposive. Penelitian melibatkan 229 siswa yang berasal dari sekolah yang mewakili kecamatan di tengah kota dan kecamatan di pinggiran kota. Hasil uji hubungan menemukan bahwa gaya pengasuhan komposit berhubungan negatif signifikan dengan agresivitas. Dimensi kehangatan gaya pengasuhan ditemukan berhubungan dengan kualitas pertemanan komposit. Hasil uji hubungan juga menemukan bahwa dimensi konflik kualitas pertemanan berhubungan dengan agresivitas. Hasil uji pengaruh model 1 menemukan hanya gaya pengasuhan yang secara konsisten memberikan pengaruh lebih besar terhadap agresivitas remaja. Sementara itu, hasil uji pengaruh model 2 menemukan adanya pengaruh yang lebih besar dari usia ibu, dimensi permusuhan, ketidakpedulian, dan konflik terhadap agresivitas remaja dibandingkan variabel lain yang diteliti pada model regresi.
Keyword: gaya pengasuhan, kualitas pertemanan, perilaku agresif, remaja, teman  sebaya

Judul: The Influences of Social Media Exposure and Emotional Intelligence on Adolescent Aggressivity in Bogor City
Abstrak: Agresivitas yang seringkali muncul di kalangan remaja menimbulkan berbagai bentuk kenakalan remaja seperti tawuran, bullying, berkelahi, dan sebagainya. Selain itu, paparan media sosial berperan besar dalam meningkatkan agresivitas remaja. Oleh karena itu, kecerdasan emosi digunakan sebagai penahan remaja untuk menurunkan potensi agresivitas. Penelitian ini bertujuan untuk menganalisis pengaruh paparan media sosial dan kecerdasan emosi terhadap agresivitas remaja SMA di Kota Bogor. Desain eksplanatori digunakan dalam penelitian ini. Penelitian dilakukan di Kota Bogor dengan kriteria contoh adalah remaja SMA usia 15-18 tahun yang dipilih secara purposive di sekolah terpilih. Jumlah contoh remaja sebanyak 264 orang. Penelitian ini menegaskan bahwa usia ibu dan paparan media sosial dengan berbagai bentuk kekerasan dan adalah variabel yang memberikan pengaruh paling kuat terhadap agresivitas remaja., Aggressivity that often appears among adolescents leads to various forms of juvenile delinquency such as brawls, bullying, fighting, and so on. In addition, exposure to social media plays a major role in increasing adolescent aggressivity. Therefore, emotional intelligence is used as a barrier for adolescents to reduce potential aggressivity. This study aims to analyze the influence of social media exposure and emotional intelligence on the aggressivity of high school adolescents in Bogor City. Explanatory design was used in this study. The research was conducted in Bogor City with the sample criteria being high school adolescents aged 15-18 years who were purposively selected in selected schools. The number of sample adolescents was 264 people. This study confirms that mother’s age and exposure to social media with various forms of violence are the variables that have the strongest influence on adolescent aggressivity.
Keyword: adolescents, aggressivity, emotional intelligence, social media exposure

Judul: Hybrid solar cells of ZnO nanoparticles/chlorophyll was modified metal ions (Zn2+ and Cu2+ )
Abstrak: Zinc Oxide (ZnO) is a n-type semiconductor with a wide the energy band (Band Gap) is 3.37 eV at room temperature and 3.34 eV at low temperature with a large exiton binding energy is 60 meV. ZnO has been synthesized by hydrothermal method, resulting in a decrease in particle size over the duration of the hydrothermal changes. Crystallographic structure of ZnO were characterized using XRD, has shown the characteristic pattern of a hexagonal wurtzite structure, the crystallite size increases to changes in particle size. Changes in particle size has also led to a change in the absorption peak of ZnO as has been demonstrated posted under test using the optical properties of UV-Vis spectrophotometer. Changes of this uptake has also led to changes in the energy band gap, which increases its band gap energy of the particle size. In electronic applications, especially in solar cells. Chlorophyll is considered less effective, because of their very nature are easily degraded as a result of several reactions which are acid, lighting and temperature. The results of the stability test using a halogen lamp 34 W/m2 for 5 hours, that the substitution of chlorophyll with metal ions Zn2+ and Cu2+ has been shown to form more stable than natural chlorophyll. The characterization of the optical properties, the combination of ZnO / chlorophyll in the form of hybrid films has led to a shift in the absorption region of ZnO becomes more widely from the UV to Visible. ZnO/chlorophyll has absorption range of 350-515 nm, ZnO / Zn-feofitin 332-401 nm and 332-632 nm for Cu-feofitin. The combination of ZnO/chlorophyll and CuSCN as a solid electrolite in hybrid solar cell, a modified chlorophyll with metal ions Zn2+ and Cu2+ has been shown to form a more stable I-V curve. It is characterized by its fill factor value greater than natural chlorophyll. Nevertheless, solar cells with natural chlorophyll has been able to produce higher efficiency values of chlorophyll were substituted.
Keyword: Hydrothermal, ZnO/Chlorophyll modified, Hybrid Solar Cell