Judul: Evaluation of Using Meta Ads on the Purchase Intention of Yourgoodhabit’s Potential Customer
Abstrak: Meta ads sebagai platform digital marketing mengalami perkembangan pesat, perkembangan ini dimanfaatkan oleh Yourgoodhabit untuk mengoptimalkan penggunaannya dengan melakukan pengiklanan, akan tetapi tidak menunjukkan kenaikan tren penjualan. Menanggapi hal tersebut, perlu dievaluasi apakah penggunaan Meta ads dapat mempengaruhi niat beli calon pelanggan Yourgoodhabit. Niat beli dapat di prediksi dengan menggunakan komponen pada Theory of Planned Behavior. Data diolah menggunakan analisis deskriptif, STP dan analisis SEM-PLS. Hasil penelitian menunjukkan calon pelanggan Yourgoodhabit dominan berusia 21-35 tahun dan variabel subjective norms serta perceived behavioral control memiliki pengaruh positif dan signifikan terhadap niat beli pelanggan Yoourgoodhabit. Sedangkan variabel attitude tidak memiliki pengaruh terhadap niat beli pelanggan. Rekomendasi meliputi konten iklan pada Meta yang menyebarkan informasi mengenai manfaat dan khasiat produk serta menyebarkan informasi tata cara pembelian produk dalam iklan atau landing page., Meta ads as a digital marketing platform is experiencing rapid development, this development is used by Yourgoodhabit to optimise its use by advertising, but does not show an increase in sales trends. In response to this, it is necessary to evaluate whether the use of Meta ads can influence the purchase intention of potential Yourgoodhabit customers. Purchase intentions can be predicted using components on the Theory of Planned Behaviour. Data is processed using descriptive analysis, STP and SEM-PLS analysis. The results showed that Yourgoodhabit's prospective customers are predominantly 21-35 years old and the subjective norms and perceived behavioural control variables have a positive and significant influence on the purchase intention of Yoourgoodhabit customers. Meanwhile, the attitude variable has no influence on customer purchase intentions. Recommendations include advertising content on Meta that disseminates information about the benefits and efficacy of products and disseminates information on how to purchase products in advertisements or landing pages.
Keyword: Niat Beli, Theory of Planned Behavior, Meta ads, calon pelanggan, Yourgoodhabit

Judul: Analisis niat pembelian produk melalui Online Shop pada Mahasiswa dengan pendekatan Theory Of Planned Behavior
Abstrak: Perkembangan internet memberikan dampak positif pada bidang perdagangan yang ditandai dengan lahirnya online shop. Sekarang ini, banyak online shop yang berkembang di Indonesia dengan berbagai macam bentuk seperti sebagai media perantara yang mempertemukan penjual dan pembeli di dunia maya. Tujuan penelitian ini adalah menganalisis pengaruh sikap terhadap perilaku, norma subjektif, dan kontrol perilaku yang dipersepsi terhadap niat pembelian di online shop. Penelitian ini mengggunakan design cross sectional-study dengan contoh sebanyak 100 mahasiswa Pascasarjana (S2) IPB yang tercatat aktif sebagai mahasiswa tahun ajaran 2013/2014. Teknik penarikan contoh penelitian ini adalah purposive sampling yang diambil secara proporsional dari 4 fakultas terpilih. Hasil penelitian menunjukkan bahwa karakteristik contoh yang memiliki hubungan dan pengaruh terhadap variabel Theory of Planned Behavior (TPB) adalah pendapatan, intensitas akses internet, jumlah sumber informasi, dan jumlah alasan membuka website. Sikap terhadap perilaku, norma subjektif, kontrol perilaku yang dipersepsi, dan niat pembelian saling berhubungan dan memengaruhi sesuai yang dihipotesiskan. Jadi, dapat dikatakan bahwa penelitian ini sesuai dengan Theory of Planned Behavior., the birth of online shop. Nowadays, many online shops grow in Indonesia on many forms such as online media that bring together the sellers and buyers in virtual world. The purpose of this study was to analyze the influence of attitudes toward behavior, subjective norms, and perceived control behavior toward purchase intentions through online shop. This research used cross-sectional design with 100 postgraduate students (S2) of IPB who are active as a student of 2013/2014 academic year. Sampling technique of this study was purposive sampling taken proportionally from 4 selected faculties. The result showed that the sample’s characterisric who have correlation and influence toward the Theory of Planned Behavior (TPB) variables were income, internet access intensity, mount of information resources, and mount of reasons to access the website. Attitude toward behavior, subjective norm, perceived control behavior, and purchase intention were interconnected and influenced appropriate with the hyphotesis. So, it can be said that this study was consistent with TPB
Keyword: Niat pembelian, Online shopping, Theory of Planned Behavior

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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