Judul: Business Development Strategy at DKI Jakarta Provincial BUMD Subsidiary Property Sector Post-Covid 19 Pandemic
Abstrak: The Covid-19 pandemic has caused a significant decrease in the property sector in DKI Jakarta. PT XYZ is a company engaged in the property sector with the status of a subsidiary of DKI Jakarta Provincial BUMD and it has been significantly affected by the pandemic. The company has three main business lines, which are property development, property services and property partnership. Currently, the property development business line dominates the company's revenue, but during the Covid 19 pandemic, the property development business line did not contribute to the company's revenue so that there was a significant decrease in performance. The purpose of the study is to develop a post-Covid 19 pandemic business development strategy at PT XYZ. This study uses a mixed method, also research that combines quantitative and qualitative analysis. The purpose of the study is to identify internal and external factors at PT XYZ currently, as well as to determine the right alternative strategies for PT XYZ in developing its business in the future. Data collection was carried out by means of observation, interviews, questionnaires and documentation. Data analysis using IFE, EFE, IE Matrix, SWOT Analysis and QSPM Analysis which shows the results of the IFE weighted score and EFE weighted score. The results of the company's IE Matrix analysis are in quadrant V which shows the recommendation of the "hold and maintain" strategy, so that strategies that can be implemented such as market penetration and product development. By using SWOT Analysis, 8 strategies were obtained, then a QSPM analysis was carried out to produce strategic priorities, which are establishing good relationships with stakeholders and utilizing these relationships to see continued business opportunities, encouraging an increase in recurring company income and compiling a grand design for PT XYZ for the next 5 to 25 years, which includes business plans and resource needs., Pandemi Covid-19 menyebabkan penurunan signifikan pada sektor properti di DKI Jakarta. PT XYZ merupakan perusahaan yang bergerak di bidang properti dengan status anak perusahaan BUMD Provinsi DKI Jakarta sehingga terdampak signifikan akibat pandemi tersebut. Perusahaan mempunyai tiga lini bisnis utama yaitu property development, property services dan property partnership. Saat ini, lini bisnis property development mendominasi pendapatan perusahaan tetapi pada saat pandemi Covid 19 lini bisnis property development tidak berkontribusi terhadap pendapatan perusahaan sehingga terjadi penurunan kinerja signifikan. Tujuan penelitian adalah menyusun strategi pengembangan bisnis pasca pandemi Covid 19 pada PT XYZ. Penelitian ini, menggunakan metode mixed method yaitu penelitian yang menggabungkan analisis kuantitatif dan kualitatif. Tujuan penelitian adalah mengidentifikasi faktor internal dan eksternal pada PT XYZ saat ini, serta menentukan alternatif strategi yang tepat bagi PT XYZ dalam pengembangan bisnis kedepannya. Pengumpulan data dilakukan dengan cara observasi, wawancara, kuesioner dan dokumentasi. Analisis data menggunakan Matriks IFE, EFE, IE, Analisis SWOT dan Analisis QSPM yang menunjukkan hasil skor tertimbang IFE dan skor tertimbang EFE. Hasil analisis Matriks IE perusahaan berada pada kuadran V yang menunjukkan rekomendasi strategi “hold and maintain”, sehingga strategi yang dapat diimplementasikan seperti penetrasi pasar dan pengembangan produk. Dengan menggunakan Analisis SWOT didapatkan 8 strategi, kemudian dilakukan analisis QSPM sehingga menghasilkan prioritas strategi yaitu menjalin hubungan baik
Keyword: strategy, Matriks IFE EFE, Matriks IE, business development, IE Matrix, IFE EFE Matrix, business development, SWOT, QSPM, Pengembangan bisnis, strategi

Judul: Business Continuity Strategy Pada Industri Indekos: Menghadapi Pandemi COVID-19
Abstrak: Indekos merupakan bisnis properti yang menargetkan konsumennya adalah para mahasiswa dan pekerja. Pandemi COVID-19 menyebabkan pelaku usaha Indekost dituntut bertahan dalam menghadapi keadaan yang mengakibatkan para konsumennya memilih untuk WFH. Tujuan dari penelitian ini adalah untuk merancang strategi yang menjadi panduan dalam merespon, melindungi, melanjutkan dan mengembalikan proses bisnis pada indeskot saat pandemi. Data penelitian bersumber dari wawancara dan kuesioner online penelitian risiko dan dampak terhadap pandemi di indekost. Penelitian ini menggunakan metode Business Continuity Strategy dengan pendekatan deskriptif kualitatif. Hasil penelitian berupa resiko industri indekost terhadap pandemi tidak bisa dihindarkan dan seluruh pemilik indekost. Dampak dari bisnis indekost mencapai penurunan penadapatan karena jumlah penyewa indekost berkurang dikarenakan pandemic. Hasil dari resiko dan dampak menghasilkan rumusan Business Continuity Strategy pada industry indekos saat pandemi menyesuaikan terkait resiko dan dampak yang telah di terima. Business continuity strategy dari hasil Analyisis Risk and Review dan Business Impact Analysis.
Keyword: analyisis risk and review, business continuity strategy, business impact analysis, indekost, pandemi

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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