• Journal of Microbiology and Biotechnology
• /
• v.31 no.10
• /
• pp.1373-1382
• /
• 2021

Plant growth promoting rhizobacteria (PGPR) are a group of bacteria that can increase plant growth; but due to unfavorable environmental conditions, PGPR are biologically unstable and their survival rates in soil are limited. Therefore, the suitable application of PGPR as a plant growth stimulation is one of the significant challenges in agriculture. This study presents an intelligent formulation based on Bacillus velezensis VRU1 encapsulation enriched with nanoparticles that was able to control Rhizoctonia solani on the bean. The spherical structure of the capsule was observed based on the Scanning Electron Microscope image. Results indicated that with increasing gelatin concentration, the swelling ratio and moisture content were increased; and since the highest encapsulation efficiency and bacterial release were observed at a gelatin concentration of 1.5%, this concentration was considered in mixture with alginate for encapsulation. The application of this formulation which is based on encapsulation and nanotechnology appears to be a promising technique to deliver PGPR in soil and is more effective for plants.

• 한국신재생에너지학회:학술대회논문집
• /
• 2007.06a
• /
• pp.729-732
• /
• 2007

폐 자동차에서 발생하는 폐차잔재물(Automobile shredder Residue)의 시멘트 열원 활용을 위하여 시멘트 킬른에서의 염소제어기술을 확립하고자 하였다. 이를 위하여 본 연구에서는 ASR 발생공정에서 발생량이 가장 많은 light fluff 시료를 채취하였으며, 채취한 시료의 염소함량 분석 및 이를 토대로 하여 시멘트 킬른에서의 염소함량 순환거동을 예측하였다. 아울러 킬른내 염소제어설비의 안정적 가동을 위하여 기존 염소제어 시스템인 태평양 시멘트회사 시스템과 우베 시멘트회사 시스템의 장단점을 비교분석하여, 시멘트 킬른 내부에 함유되어있는 다량의 염소성분을 제어할 수 있는 기술개발 방향을 제시하고자 하였다.

• Journal of Advanced Navigation Technology
• /
• v.26 no.5
• /
• pp.272-280
• /
• 2022

An aircraft carrier is a combat ship that acts as an aircraft base at sea and performs combat through aircraft mounted as a military ship operating the aircraft. The Navy proposed a 40,000-ton light aircraft carrier operation plan that could be equipped with vertical takeoff and landing fighter jets and helicopters around 2033, and based on this, this study examined the operation of aircraft control equipment among the aviation support systems required for operating light aircraft carriers in Korea. PriFly, TWR's ILARTS, ILM for airspace control, ASR, PAR, LAAS or RNAV, PALS (JPALS) for access control are required as essential equipment, and communication network and SCATT-16 are required along with URN-25 TACAN, ICLS (El/Az), ACLS OLS, MOVAS, IFLOLS, etc. This study consists of two parts, and part 2 will describe a specific control method on an aircraft carrier.

• Journal of Microbiology and Biotechnology
• /
• v.29 no.7
• /
• pp.1096-1103
• /
• 2019

UCB-1 is the commercial rootstock of pistachio. Reproduction of this rootstock by tissue culture is limited by low levels of proliferation rate. Therefore, any compound that improves the proliferation rate and the quality of the shoots can be used in the process of commercial reproduction of this rootstock. Use of plant growth-promoting bacteria is one of the best ideas. Given the beneficial effects of nanoparticles in enhancement of the growth in plant tissue cultures, the aim of the present study was to investigate the effects of nanoencapsulation of plant growth-promoting rhizobacteria (using silica nanoparticles and carbon nanotubes) and their metabolites in improving UCB1 pistachio micropropagation. The experiment was conducted in a completely randomized design with three replications. Before planting, treatments on the DKW medium were added. The results showed that the use of Pseudomonas fluorescens VUPF5 and Bacillus subtilis VRU1 nanocapsules significantly enhanced the root length and proliferation. The nanoformulation of the VUPF5 metabolite led to the highest root length (6.26 cm) and the largest shoot (3.34 cm). Inoculation of explants with the formulation of the metabolites (both bacterial strains) significantly elevated the average shoot length and the fresh weight of plant compared to the control. The explants were dried completely using both bacterial strains directly and with capsule coating after the three days.

• Journal of the Korean Recycled Construction Resources Institute
• /
• v.10 no.1
• /
• pp.9-14
• /
• 2022

Most of the existing research on ferronickel slag has focused on its potential as aggregate and fine aggregate, this study was conducted focusing on the potential of ferronickel slag powder as a concrete admixture. For concrete, which fly ash, blast furnace slag, and FSP were mixed with each 10 % type the reactivity was evaluated by applying ASTM C 1260 of the United States. As a result, compared with the control group, the expansion rate of fly ash decreased by 8.43 % and that of fine blast furnace slag powder decreased by 14.46 %, while the expansion rate of ferronickel slag decreased by 49.40 %. it was confirmed that ferronickel slag can sufficiently be replaced existing supplementary cementitious admixtures such as fly ash and blast furnace slag in terms of suppressing the reactivity of aggregates. However as a result of SEM analysis, ettringites were generated, and additional research about how it affects concrete is needed.

• Proceedings of the Korean Society of Precision Engineering Conference
• /
• 2002.05a
• /
• pp.305-308
• /
• 2002

The mechanics, electronics and manufacturing technology have been developed rapidly. Nowadays vehicle stability becomes more and more important then ABS (Anti-lo7k Brake System), ASR (Anti-Slip Regulator), TCS, (Traction Control System), ESP (Electronic Stability Program), and VDC (Vehicle Dynamic Control) which actively control the vehicle stability actively has been improved. In this study, instead of automatic transmission, CVT (Continuously Variable Transmission) is used because of the continuously gear ratio changes. It can effectively transfer the torque from engine to tire more than other gear transmission. The modeling is simplified assuming that there are no resistance parameters.

• Journal of Institute of Control, Robotics and Systems
• /
• v.8 no.10
• /
• pp.898-906
• /
• 2002

Antilock Brake System (ABS) is designed to prevent wheels from being locked-up under emergency braking of a vehicle. Therefore it improves directional stability of the vehicle, shortens stopping distance, and enhances maneuvering during braking, regardless of road conditions. Hardware In-the-Loop Simulation (HILS) is an effective tool for design Performance evaluation and test of vehicle subsystems such as ABS, active suspension, and steering systems. This paper describes a HILS model for ABS/ ASR(Acceleration Slip Regulation) system applications. A fourteen degrees-of-freedom vehicle dynamics model is simulated in an alpha-chip processor board. The proposed HILS system is tested with a basic ABS control algorithm. The design and implementation of HILS system for the ABS ECU(Electronic Control Unit) development of commercial vehicle are presented. The results show that the proposed HILS system can be used to test the performance, stability, and reliability of a vehicle under braking.

• The Journal of Korean Institute of Communications and Information Sciences
• /
• v.15 no.5
• /
• pp.399-405
• /
• 1990

Rapid Thermal Process(RTP) has been used to precisely control and study the reaction rate for the formation of refractory titanuium silicide. Samples were prepared by sputtering deposition layer of titanium on n-type, poly-deposit silicon wafers. The process were then sujected to a matrix of rapid time-temperature profile under nitrgen, argon gas ambient to precisely control the silicide formation. Reacted films were analyzed by the sheet resistance measursrement, SEM, ASR and X-ray diffraction. Results were shown that the resistivity of the silicide films are below 20u-cm and the thickness of silicide films are about two times than that of as-deposited titanium films. Silicidation ambient was likely to happen at the same tamperature-time condition for argon and nitrogen gas.

• Transactions of the Korean Society of Automotive Engineers
• /
• v.11 no.2
• /
• pp.211-216
• /
• 2003

The influence of braking force generated by one tire on vehicle dynamics was investigated by simulation and ground test. A 8 d. o. f vehicle model was developed for simulation. And a special device to apply brake pressure to individual wheel was built for vehicle test. As a result of corner braking test on straight driving, the dynamic responses such as yawrate, lateral acceleration and roll angle were produced in the vehicle, which were in a good agreement to the simulation results. This shows that comer braking used in VDC system can control vehicle dynamics to improve controllability and directional stability.

• Proceedings of the KIEE Conference
• /
• 2000.07d
• /
• pp.2564-2566
• /
• 2000

HILS(Hardware In-the-Loop Simulation) is an effective tool for design, performance evaluation and test of developed vehicle subsystems such as ABS(Antilock Brake System), suspension, and steering systems. This paper describes a HILS model for an ABS/ASR application. Also the implementation of HILS system for performance test of the ABS ECU(Electronic Control Unit) for commercial vehicles is presented.