Judul: Factors Affecting Productivity of Plantation Employees at PT. Great Giant Pineapple, Central Lampung
Abstrak: The movement of a company can’t be separated from resources owned by the company. In this case, the success of a company is strongly supported by the human resources in it. Good work management in a company can be reflected in the creation of a balance between labor productivity and the demands of the company's progress. Therefore, this research aims to analyze internal and external factors related to the productivity of plantation employees in the agro-industrial company engaged in the production and largest pineapple exporter in Indonesia, PT. Great Giant Pineapple. This research also aims to analyze factors most influence productivity of plantation employees. This research was conducted by taking data from 220 respondents of plantation employees using the convenience technique method. Furthermore, data processing and validity and reliability test were carried out using SPSS 17 Ver 25.0, and quantitative tests were processed using SmartPLS to analyze the structural equation model using SEM-PLS. Based on the result, there are six factors that influence the productivity of plantation employees: motivation, competence, work environment, discipline, work quality, and incentive, which are then tested on employee productivity factors. The factor of motivation, competence, discipline, work quality, and incentive have a significant effect on the productivity of employees, while the work environment factor has an insignificant effect on the productivity of employees.
Keyword: competence, discipline, employee productivity, incentive, motivation

Judul: Faktor Penentu Produktivitas Tenaga Kerja Panen Kelapa Sawit PT Tanjung Buyu Perkasa Plantation, Kalimantan Timur
Abstrak: The effectiveness of labor was heavily influenced by development, arrangement, and utilization of labor by the company. The objective of internship to improve the knowledge, skills, experience of student and prepared to confront real job. The additional objective to study the factors that influence the labor productivity of palm oil harvesting. Descriptive and multiple linear regression method were used in data analysis. The multiple linear regression analysis partially showed level on education, the number of dependents and age had no significant effect on labor productivity, while length of work affect significantly. Simultaneous regression testing shows the education level, number of dependents, age and length of work have significant effect to labor productivity on harvesting.
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Judul: Penyelesaian Masalah Rotasi Aliran Fluida Kental Von Karman Menggunakan Metode Homotopi
Abstrak: Von Karman equation is an equation that describes fluid viscous flow induced by infinite disk rotation. By assuming steady flow and laminar, viscous incompressible fluid flow is represented in Von Karman equation by an angular velocity and the vertical direction velocity as the independent variables. Von Karman equation is a nonlinear problem that is solved using the homotopy method. The use of homotopy method is done by defining an homotopy function that requires auxiliary parameters to control the convergent region of the solution. The solution is a recursive formula with given initial conditions. Using software based-functional shows that velocity components converge to a value.
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