Judul: Pengaruh pengasuhan orangtua dan teman sebaya terhadap perilaku konsumsi Napza pada remaja
Abstrak: Perilaku konsumsi narkotika, alkohol, psikotropika, dan zat adiktif atau biasa di sebut dengan napza sudah sangat mengkhawatirkan di Indonesia, khususnya pada kalangan remaja. Penelitian ini memiliki tujuan untuk mengetahui pengaruh gaya pengasuhan orang tua dan teman sebaya terhadap perilaku konsumsi napza pada remaja. Populasi dalam penelitian ini adalah siswa kelas sepuluh dan sebelas SMK X di Kota Bogor, dan melibatkan 61 contoh menggunakan purposive sampling dengan karakteristik yang pernah mengkonsumsi napza. Hasil penelitian frekuensi pengkonsumsian napza remaja berada pada kategori kurang dari satu kali dalam satu minggu, dengan proporsi terbesar jenis napza yang sering dikonsumsi adalah alkohol dan ganja. Hasil penelitian menunjukan lebih dari separuh (52.46%) ayah menerapkan gaya pengasuhan permisif, sedangkan lebih dari separuh ibu (63.93%) menerapkan gaya pengasuhan otoritatif. Hasil uji regresi menunjukan gaya pengasuhan otoritatif ayah berpengaruh positif terhadap perilaku konsumsi napza pada contoh. Pengaruh positif lain pada pengkonsumsian napza juga datang dari kedekatan teman sebaya. Sementara itu, gaya pengasuhan otoriter ibu berpengaruh negatif pada perilaku itu., Consumption behavior of narcotics, alcohol, psychotropic and addictive substance or commonly called drugs is very worrying in Indonesia, especially on adolescent. This study aimed to analyze the influence of parenting styles and peer groups on drugs consumption of adolescent behavior. The population of this study were students of class ten and eleven of SMK X in Bogor City, and involved 61 sample’s taken purposively with characteris tic have ever consumed drugs. Result showed drugs consumption frequency was on less than once in a week category, with highest proportion of most frequent drugs were alcohol and marijuana. Result showed that more than half of sample’s fathers applied permissive parenting, whereas more than half of sample’s mothers applied authoritative parenting style. Regression analysis discovered father’s authoritative parenting style positively effected on sample’s drugs consumption. Another positive influence on drugs consumption also came from peers. Meanwhile, mother’s authoritarian parenting style negatively influenced on that behavior.
Keyword: Gaya Pengasuhan, Napza, Teman Sebaya

Judul: Hubungan Pola Interaksi dengan Motif Penyalahgunaan Narkotika, Psikotropika, dan Zat Adiktif (Napza) Di Kalangan Remaja
Abstrak: Indonesia has a fairly long history on the issue of child and adolescent delinquency that has now entered the critical points. One of the worrying problem is the case of drug abuse (narcotics, psychotropic and addictive substances). This study aimed to describe the individual characteristics and family characteristics, patterns of interaction adolescent drug abusers, analyze motives drug abuse, as well as analyzing the interaction patterns of relationship with drug abuse patterns. This study examines two patterns of adolescent drug abusers, there are the family interaction patterns and friendship interaction pattern. The results showed that both family interaction patterns and interaction patterns of friendship has a relationship with drug abuse patterns.
Keyword: motifs of drug abuse, patterns of interaction, drug

Judul: Hamiltonian formulation for linear waves motion in two layers fluid
Abstrak: The surface wave could be considered as a wave that separates two fluids, namely water and air. Based on this assumption, it is introduced the interfacial wave, a wave between two layers of fluid with different density. The formulation of interfacial waves motion begins with deriving the base equation of irrotational ideal fluid. Furthermore, according to irrotational fluid assumption, the base equation can be stated in velocity potential. In this derivation, the fluids domain is assumed to be restricted by rigid lid boundary conditions, both at the upper and lower limit. Therefore, the interfacial waves motion can be explained in a hamiltonian formulation. In the hamiltonian formulation, total energy is defined as the sum of kinetic and potential energy. The hamiltonian system is obtained from reduction of kinetic energy by using the Dirichlet Neumann Operator. The resulted kinetic energy equation is nonlinear. Therefore, this form is linearized by first part of the Taylor expansion. This linearization gives a dispersion relation of linear wave. Based on this dispersion relation, the phase speed of the linear wave depends on the density ratio of the two layers fluid.
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