Judul: The Effect of Compensation to Employee  Satisfaction at PT Perkebunan Nusantara VIII’s Head Office
Abstrak: PT Perkebunan Nusantara VIII merupakan anak perusahaan BUMN sektor perkebunan. Berdasarkan laporan hasil survei kepuasan karyawan PTPN VIII Tahun 2020, persentase kepuasan karyawan kantor pusat paling rendah diantara wilayah kantor lain. Dilihat dari faktor pengukurannya, kepuasan atas gaji, tunjangan, dan kompensasi lainnya memperoleh persentase terendah diantara tiga faktor pengukuran lain. Penelitian ini bertujuan untuk (1) mengetahui sistem kompensasi yang berlaku di kantor pusat PTPN VIII, (2) mengidentifikasi persepsi mengenai sistem kompensasi dan kepuasan karyawan kantor pusat PTPN VIII, dan (3) mengetahui pengaruh kompensasi terhadap kepuasan karyawan kantor pusat PTPN VIII. Sampel penelitian ini sebanyak 71 karyawan dari berbagai bidang kerja dan golongan. Metode pengolahan data menggunakan analisis deskriptif dan SEM PLS. Sistem kompensasi PTPN VIII mengacu pada Perjanjian Kerja Bersama (PKB) yang disusun berdasarkan peraturan pemerintah dan perusahaan holding serta disepakati oleh serikat pekerja dan perusahaan. Hasil analisis deskriptif menunjukkan bahwa persepsi karyawan terhadap sistem kompensasi PTPN VIII dalam kategori baik, begitupun persepsi pada kepuasan karyawan. Adapun hasil analisis SEM-PLS menunjukkan bahwa kompensasi berpengaruh positif dan signifikan terhadap kepuasan karyawan.
Keyword: compensation, employee satisfaction, PTPN VIII

Judul: The Influence of Employee Engagement and Job Satisfaction on Turnover Intention at the Head Office of PT Perkebunan Nusantara VIII
Abstrak: Kantor pusat PTPN VIII memiliki sepuluh divisi berbeda yang saling berkesinambungan. Berdasarkan hasil laporan manajemen kantor pusat PTPN VIII tahun 2019 dan 2020 menunjukkan penurunan jumlah karyawan karena turnover sebesar 61 karyawan atau 20,03%. Dalam mencari pengaruh yang menyebabkan turnover intention, employee engagement dan kepuasan kerja dapat menjadi faktor penting dalam melihat keterkaitannya. Penelitian ini bertujuan untuk mengidentifikasi karakteristik karyawan di kantor pusat PT. Perkebunan Nusantara VIII, menganalisis pengaruh employee engagement terhadap kepuasan kerja, menganalisis pengaruh employee engagement terhadap turnover intention, dan menganalisis kepuasan kerja terhadap turnover intention. Data dalam penelitian diperoleh melalui data primer dan sekunder. Analisis data menggunakan analisis deskriptif dan analisis SEM-PLS. Hasil penelitian menunjukan employee engagement berpengaruh positif dan signifikan terhadap kepuasan kerja, employee engagement berpengaruh negatif dan tidak signifikan terhadap turnover intention, dan kepuasan kerja berpengaruh negatif dan tidak signifikan terhadap turnover intention., PTPN VIII head office has ten different divisions that are mutually sustainable. Based on the results of the PTPN VIII head office management report in 2019 and 2020, the number of employees decreased due to a turnover of 61 employees or 20.03%. In looking for the influence that causes turnover intention, employee engagement and job satisfaction can be important factors in seeing the relationship. This study aims to identify the characteristics of employees at the head office of PT. Perkebunan Nusantara VIII, analyzed the effect of employee engagement on job satisfaction, analyzed the effect of employee engagement on turnover intention, and analyzed job satisfaction on turnover intention. The data in the study were obtained through primary and secondary data. Data analysis used descriptive analysis and SEM-PLS analysis. The results showed that employee engagement had a positive and significant effect on job satisfaction, employee engagement had a negative and insignificant effect on turnover intention, and job satisfaction had a negative and insignificant effect on turnover intention.
Keyword: SEM PLS, analisis deskriptif

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.
Keyword: