• Journal of Korean Society of Industrial and Systems Engineering
• /
• v.28 no.4
• /
• pp.85-93
• /
• 2005

This paper is designed a VSI ${\overline{X}}$-CRL synthetic control chart in aspect of economy. We found the optimal sampling interval and various control limit factors under various cost parameters using cost function, proposed Lorenzen and Vance. Optimal design parameters include the sample size, control limit width, sampling interval, CRL/S chart control limit; L. Comparison and analysis of cost parameters are applied between synthetic VSI ${\overline{X}}$-CRL chart and FSI ${\overline{X}}$-CRL chart. The result of this paper shows that VSI ${\overline{X}}$-CRL chart brings cost-cutting effect of 3.04% control expense less than FSI control chart. It may not be difficult to establish the optimal economic control parameters to apply the practical cost parameters in the field.

• Journal of the Korea Institute of Information and Communication Engineering
• /
• v.19 no.2
• /
• pp.351-356
• /
• 2015

Synthetic utilization on multiprocessor system is not considered periodic tasks, except scheduling methods for aperiodic tasks where one of the real-time aperiodic tasks is a scheduling method. But really aperiodic tasks scheduling method is composed of mixed task types. Aperiodic task scheduling method guarantee an analysis of the schedualibility of aperiodic task. The set of mixed tasks periodic and aperiodic tasks scheduling method uses improved synthetic utilization that is presented in this paper. The new method shows that schedulability increases aperiodic server method.

• Proceedings of the Korean Society for Technology of Plasticity Conference
• /
• 2008.05a
• /
• pp.247-251
• /
• 2008

This paper presents a micro air pump actuated by PZT actuator (synthetic jet actuator) for air supply for micro fuel cells. The synthetic jet actuators are usually created by a traditional PZT-driven actuator, which consists of a small cylindrical cavity, in/outlet channel and PZT diaphragms. To design the micro air pump, a numerical analysis has been conducted for flow characteristics with respect to various geometries. A prototype of the micro air pump, with a size of $mm{\times}mm{\times}mm$, was fabricated by PDMS replication process and was conducted performance test. To control the PZT actuator, we used the SP4423 micro chips that can be amplified input voltage to reduce the controller size and the power consumption. With a voltage of 3V at 100Hz, the air pump's pumping pressure is 600pa and its power consumption is only 0.1mW.

• Korean Journal of Plant Tissue Culture
• /
• v.22 no.4
• /
• pp.201-205
• /
• 1995

The synthetic oligomers called nos right palindrome (RP) element and left palindrome (LP) element were inserted into nos.minimal promoter nos 5'-101 deletion mutant The activity of nos promoter was measured by studying the expression pattern of gene fusion between nos promoter and reporter genes such as chloramphenicol acetyltransferase and $\beta$-glucuconidase. Analysis of transgenic tobacco plane carrying transgene showed that the activity of nos minimal promoter activity was recovered by insertion of synthetic nos RP element. Nos RP element insertion of nos minimal promoter was induced by auxin, dithiothreitol, salicylic acid and methyl jasmonate.

• The Journal of the Acoustical Society of Korea
• /
• v.25 no.4
• /
• pp.172-177
• /
• 2006

Various research and development on Synthetic Aperture Sonar technique is under way to enhance bearing resolution of a SONAR system. In this paper, we estimated perturbed array shapes, and compensated distortion by using estimated away shapes and synthesized arrays in aperture domain such as an ETAM technique. As experimental data, we used the one obtained from towed array in neighboring waters of the Korean peninsula. Through simulation on data where tow-ship speed is maintained at a constant level, we confirmed that synthesis effect of increasing SNR and narrowed beam width of main lobe was consistently demonstrated for about 1 minute when coherence of target signal was maintained. Also, we showed that the synthesis effect with respect to time was constantly maintained.

• Journal of Wind Energy
• /
• v.14 no.1
• /
• pp.37-43
• /
• 2023

In this study, synthetic time series wind data was generated numerically using a second-order Markov chain. One year of wind data in 2020 measured by the AWS on Wido Island was used to investigate the statistics for measured wind data. Both the transition probability matrix and the cumulative transition probability matrix for annual hourly mean wind speed were obtained through statistical analysis. Probability density distribution along the wind speed and autocorrelation according to time were compared with the first- and the second-order Markov chains with various lengths of time series wind data. Probability density distributions for measured wind data and synthetic wind data using the first- and the second-order Markov chains were also compared to each other. For the case of the second-order Markov chain, some improvement of the autocorrelation was verified. It turns out that the autocorrelation converges to zero according to increasing the wind speed when the data size is sufficiently large. The generation of artificial wind data is expected to be useful as input data for virtual digital twin wind turbines.

• Journal of the Korean Society for Library and Information Science
• /
• v.32 no.2
• /
• pp.55-76
• /
• 1998

The first part of this article investigates the general characteristics and the advantages and disadvantages of the analytico-synthetic classification over the enumerative one. The second part analyzes the general steps and related problems in compiling an analytico-synthetic scheme, and investigates the steps further including facet analysis , choosing order in main classes, citation order and order in array : and adding notations, through an illustrative scheme for a matrimonial agency's records.

• International Journal of Control, Automation, and Systems
• /
• v.6 no.6
• /
• pp.894-903
• /
• 2008

In this paper, we present an artificial muscle actuator producing rectilinear motion, called the Tube-Spring-Actuator(TSA). The TSA is supposed to be a prospective substitute in areas requiring macro forces such as robotics. It is simply configured from a synthetic elastomer tube with an inserted spring. The design of the TSA is described in detail and its analysis is conducted to investigate the characteristics of the actuator based on the derived model. In addition, the performance of the proposed actuator is tested via experiments.

• Environmental Analysis Health and Toxicology
• /
• v.5 no.1_2
• /
• pp.37-44
• /
• 1990

Synthetic detergents and surfactants are in widespread usage as household and industrial detergents. Potential human toxic hazard arises following percutaneous absorption or oral ingestion of solution residues from kitchen and feeding utensils, fruits, and vegetables and contaminated water supplies. A toxicological investigations was performed with the synthetic detergents and surfactants [linear alkyl benzene sulfonate (LAS), ${\alpha}$-olefin sulfonate (AOS), sodium lauryl sulfonate (SLS), sodium lauryl ester sulfonate (SLES)］, In acute toxicity, agents were administered subcutaneously into ICR mice. In acute study, after lowering of spontaneous motility, respiratory failure, death appeared, vomitting was often associated with salivation and or retching. No sex difference was observed in LD$\sub$50/ of mice. In subacute toxicity, agents were administered orally into SD rats. Body weight increase was suppressed and there was no adverse effect on food and water consumption. The weight of organs were not changed by agents as compared with control group. No specific change was observed in biochemical and hematologicalor data.

• Journal of the Korean Society for Precision Engineering
• /
• v.22 no.3 s.168
• /
• pp.101-106
• /
• 2005

It needs to accumulate a store of know-how on the design, precision processing and appraisement for metering pump which is a kind of gear pump fer synthetic fibers. But the period and cost fur development is not effective, because designers experience many trial and error for the pump design and manufacturing process. Therefore, in order to curtail the period and cut down expenses, the analysis and simulation system is required for a designed metering pump. In this study, the pump simulation software was developed with the visual C++ language and the image processing algorithm, and was investigated through a discharge test for the planetary gear type metering pump.