• Journal of Korea Water Resources Association
• /
• v.49 no.8
• /
• pp.673-683
• /
• 2016

An Idea to estimate flexible criteria for river water use permits was proposed that takes the spatio-temporal flow variation along the river into account, which was applied to the Keumho River, one of the tributary of the Nakdong River in Korea. This idea implies the temporal division of four periods with different criteria, combining flood/non-flood seasons and irrigation/non-irrigation periods, while a single one has been applied throughout the year in the current practice. Through flow regime analysis of daily natural flow simulations at Dongchon and Seongseo, the control points of the study area, Q355 and 1Q10 for non-flood and non-irrigation period, Q275 for non-flood and irrigation period, Q185 for flood and irrigation period were suggested respectively. So, those values that subtract instream flow were determined as the flexible criteria in each season. From the comparison of current practice and the proposed method, it was estimated that $10.6\;million\;m^3/year$ is available for more water use permits without additional development of water storage. Therefore, it is conceived that flexible criteria for river water use permission suggested in this study can contribute to improve the national policies for more efficient water resources management in the future.

• 주택과사람들
• /
• no.29 s.46
• /
• pp.25-34
• /
• 1994

• Food Industry
• /
• s.35
• /
• pp.107-114
• /
• 1976

• Monthly Korean Chicken
• /
• v.20 no.9
• /
• pp.62-62
• /
• 2014

• KLA journal
• /
• v.27 no.4
• /
• pp.2-28
• /
• 1986

• 사료
• /
• s.10
• /
• pp.74-78
• /
• 2004

• The Korea Swine Journal
• /
• v.24 no.10 s.278
• /
• pp.142-144
• /
• 2002

• 월간산업보건
• /
• s.339
• /
• pp.22-31
• /
• 2016

• The Proceedings of the Korean Institute of Illuminating and Electrical Installation Engineers
• /
• v.9 no.1
• /
• pp.54-62
• /
• 1995

This paper is a study on a speed control of an induction motor used the MRA-DSM(Mode1 Reference Adaptive-Discrete Sliding Mode) controller. In this paper, when controls motor speed, DSM algorithm is proposed for having Robustness against disturbance and parameter variation. and it is also proposed MRA-DSM including the additional load model reference algorithm, which can be compensated the discontinuous control imputs at sliding mode and followed the model Preference independent of parameter variation of control subjects. The control system is composed of the parallel processing control system using the microprocessor for maximizing the performance of control systems and the real time processing. Also it simplifies the hardware composed of controlling the system by software and improves the reliability of the system. And while MRA-DSM control, faster response characteristics of 27.2 % is obtained than DSM control.

• KOREAN JOURNAL OF PACKAGING SCIENCE & TECHNOLOGY
• /
• v.22 no.3
• /
• pp.163-168
• /
• 2016

In this study, we analyzed the empty body weight and nominal volume of different types of polyethylene terephthalate (PET) bottles commercialized in Korean market. Over 780 PET bottles were collected and classified into four types, heat resistance bottle, normal resistance bottle, pressure resistance bottle, and long period using bottle. Each PET bottle's lightness index was established using bottle weight and nominal volume. Based on the index value, "acceptable" and "optimum" criteria for design guideline of PET bottle were summarized for each PET bottle type. In this paper, we suggest the use of PET bottle lightness index as a design guideline for material resource reduction of PET bottle for Korean beverage industries and bottle makers. For example, we can achieve 2~4 g weight reduction in normal pressure bottle for 500 mL drinking water.