• International Journal of Aeronautical and Space Sciences
• /
• v.11 no.4
• /
• pp.338-344
• /
• 2010

This paper discusses the development of the control system of a mini quadrotor in Konkuk University for indoor applications. The attitude control system consists of a stability augmentation system, which acts as the inner loop control, and a modern control approach based on modeling will be implemented as the outer loop. The inner loop control was experimentally satisfied by a proportional-derivative controller; this was used to support the flight test in order to validate the modeling. This paper introduces the mathematical model for the simulation and design of the optimal control on the outer loop control. To perform the experimental tests, basic electronic hardware was developed using simple configurations; a microcontroller used as the embedded controller, a low-cost 100 Hz inertial sensors used for the inertial sensing, infra-red sensors were employed for horizontal ranging, an ultrasonic sensor was used for ground ranging and a high performance propeller system built on an quadrotor airframe was also employed. The results acquired from this compilation of hardware produced an automatic hovering ability of the system with ground control system support for the monitoring and fail-safe system.

• The Journal of Asian Finance, Economics and Business
• /
• v.7 no.11
• /
• pp.541-548
• /
• 2020

This study aimed to explain the factors that influenced an individual's decision to migrate. The method of analysis in this study was the estimation of the probit regression model with data from the Indonesian Family Life Survey (IFLS-5), which covered 30,000 individuals from 13 provinces in Indonesia. Data from IFLS-5 were longitudinal data, meaning that the study was looking for data consistently to get reliable data from respondents. The research variables to determine the individual's decision to migrate were education level, income level, employment status, marital status, land ownership status, health quality, gender, residence status, and poverty status. Individual decision to migrate as a dependent variable was placed as a dummy variable. The results showed that the level of education, income level, employment status, marital status, land ownership status, health quality, and poverty status significantly influenced an individual's decision to migrate. Meanwhile, gender and residence status did not significantly affect an individual's decision to migrate. This research recommends that it is necessary to pursue a policy of economic equality between regions because economic factors are the main trigger for an individual's decision to migrate. Policies to overcome economic disparities among regions will reduce the individual's decision to migrate.

• The Journal of Asian Finance, Economics and Business
• /
• v.9 no.3
• /
• pp.105-112
• /
• 2022

The current study is at the forefront of examining the theory of principal-agent framework and financing constraints to explain the level of corporate innovation. To boost the firm's level of innovation, this study uses corporate governance and corporate performance as driving factors. The study's secondary goal is to give information on the parallel relationship between corporate governance and the level of corporate innovation. This study used a two-step least square (TSLS) regression analysis to examine such a simultaneous association using secondary data from Indonesian listed businesses from 2000 to 2021, which totaled around 1,910 observations. This study uses the Principal Component Analysis (PCA) tool to test cumulative variances of potential corporate governance indicators such as the total commissioner of the firm (TCOM), total independent commissioner of the firm (INDPCOM), the proportion of institutional ownership (INSOWN), total female commissioner (FEMCOM), CEO duality (CEODUAL), and type of the firm (SOE). As a result, PCA reveals that four of these variables, omitting CEODUAL and SOE, were a corporate governance construct. Furthermore, the study discovered that the amount of firm innovation and corporate governance are related.

• The Southeast Asian review
• /
• v.29 no.3
• /
• pp.39-80
• /
• 2019

This article examines the reason why Indonesian Javanese are using their traditional medicine jamu. Tracing the cultural logic of Javanese, this study observes the space and the process in which the demand on jamu is culturally constructed. In order to address this, the article focuses on Javanese family and their royal court, the spaces where jamu originated from and has been used. Then, the discussion proceeds to identify jamu as a medium to construct rukun(harmony) and tentram(peace), as well as to express and ensure Javanese cosmology. Along with the research, the article argues that: 1) jamu is an embodiment of Javanese local knowledge system into which Javanese consciousness, notions, knowledge, and techniques integrate; 2) the health achieved by using jamu is what Javanese call tentram, which encompasses physical, mental, spiritual and social dimensions of health; 3) the health of tentram has the value of a resource that becomes the foundation to build a good, prosperous society.