Judul: Pengaruh Perilaku Kewirausahaan Petani Anggrek Terhadap Kinerja Usaha: Kasus di Kecamatan Gunung Sindur dan Parung, Kabupaten Bogor, serta Kecamatan Serpong, Kota Tangerang Selatan
Abstrak: The opportunities of orchid development in Indonesia is still potentially increased because of the genetic resources of orchid are abundant, in addition the agro-climatic conditions, availability of land is relatively wide, the support of labor and technology, and the potential market at domestic and abroad, those are comparative advantage that potential to be developed into a competitive advantage. But instead, the performance of orchid industrialization still in low performance. The low performance of the national orchid industry due to the lack of competence orchid farmers, such as: (1) lack of knowledge of consumer preferences, (2) lack of technology in breeding, cultivation, and post-harvest, and (3 ) lack of responsiveness to the market information. The present of orchid farmers entrepreneurial behavior hopely could increase the bussiness performance. In order that, the purpose of the research are; (1) describe the orchid farmers characteristics, (2) to analyse the influence of internal and external factors on entreprenerial behavior, and (3) to analyse the influence of entreprenenurial behavior on bussiness performance. This research used 115 data of orchid farmers, than its analized by SEM using Lisrel 8.3 programs. Based on the results obtained that the characteristics of orchid farmers generally include: (1) the majority of the level of education orchid are high school graduates, (2) they have quite long experience in orchid cultivation, (3) for most farmers this effort is the main livelihood, (4) generally, the venture capital obtained from private equity, (5) the standard of living and welfare of orchid growers generally still in low conditions, due to small-scale enterprises, which in turn impact on revenue, and the majority of orchid growers were oriented only for daily needs. The result by using SEM are; (1) The Entrepreneurial behavior is influenced positively and significantly by the internal factors,instead (2) The external factors gave the negative and significant influences, but it’s directly influence the bussiness performance positively and significantly, (3) entrepreneurial behavior gave positive and significant effect on business performance. SEM shows the test results with the internal factors positive and significant impact on enterpreneur behavior with effect coefficient 0,56. Internal factors measured by indicators; venture scale, capital ownership, ownership of production facilities and infrastructure, motivation achievement, the perception of orchids business and entrepreneurship intentions. Increasing the internal factors will increase the entrepreneurial behavior orchid growers. This shows the increase in business scale, enterpreneurial intentions, motivation achievement and perceptions of high effort, can increase entrepreneurial behavior. External factors significantly and negatively related with entrepreneurial behavior, which the influence coefficient is -0.15. While External Factors significantly and negatively related to entrepreneurial behavior, this is due to government support in the aspect of education and counseling, assistance and capital inputs, promotion and marketing, business regulations, and the availability of market information, are not in accordance with the needs of farmers and not on target. Generally the government support in terms of extension and training, procurement assistance and capital inputs, promotion and marketing, business regulations, and the availability of market information, until now felt not sufficient, and not support the formation of behavioral entrepreneurship. Overall, the governments through the relevant agencies
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Judul: Pengaruh Perilaku Kewirausahaan dan Kompetensi Kewirausahaan terhadap Kinerja Usaha Tanaman Hias di Kota Bogor
Abstrak: Usaha tanaman hias merupakan usaha yang didominasi oleh UMK, sehingga memiliki peranan vital dalam pembangunan dan pertumbuhan ekonomi. Kota sentra produksi tanaman hias terbesar di Provinsi Jawa Barat adalah Kota Bogor. Hal ini menjadi peluang dalam pengembangan usaha tanaman hias di Kota Bogor yang bisa dilakukan melalui pengembangan perilaku kewirausahaan dan kompetensi kewirausahaan pengusaha tanaman hias. Tujuan dalam penelitian ini adalah untuk menganalisis pengaruh perilaku kewirausahaan dan kompetensi kewirausahaan terhadap kinerja usaha tanaman hias di Kota Bogor. Responden pada penelitian ini adalah pengusaha tanaman hias dengan jumlah 100 orang yang ditentukan dengan metode convenience sampling. Analisis data dalam penelitian ini menggunakan Structural Equation Model (SEM) dengan bantuan software AMOS 23. Hasil penelitian menunjukkan bahwa perilaku kewirausahaan berpengaruh positif dan signifikan terhadap kinerja usaha tanaman hias dengan nilai koefisien 0,29. Selain itu, kompetensi kewirausahaan juga berpengaruh positif dan signifikan terhadap kinerja usaha tanaman hias dengan nilai koefisien 0,51. Hal ini berarti setiap peningkatan perilaku kewirausahaan dan kompetensi kewirausahaan akan dapat meningkatkan kinerja usaha tanaman hias di Kota Bogor.
Keyword: micro and small enterprises, entrepreneurial behavior, entrepreneurial competence, business performance, ornamental plants, structural equation model

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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