타워 디펜스 게임에서 레벨 디자인은 게임의 재미에 가장 큰 영향을 미치는 요소이다. 각 레벨의 난이도는 레벨 내에 등장하는 공격대의 조합에 따라 결정된다. 게임 기획 단계에서 게임의 재미를 주면서도 적절한 난이도를 갖춘 공격대를 구성하기 위하여 많은 시간이 소모된다. 본 논문에서는 유전자 알고리즘을 사용하여 타워 디펜스 게임에서 공격대 조합을 자동으로 생성하는 기법을 제안한다. 제안된 시스템을 통해 레벨 디자이너는 난이도 목표치의 입력만으로도 다양한 공격대 유닛 조합을 자동으로 생성할 수 있게 된다. 이는 게임 기획 단계에서 원하는 공격대 조합을 생성하는데 필요한 수작업 시간을 단축시킴으로서 업무 효율을 높일 수 있을 것이다.

This study was carried out to evaluate the effect of water quality of cooling tower on Legionella pneumophila disinfection using Ru/Ti electrode. The influences of parameters such as pH, turbidity, CaCO₃ and TOC were investigated using laboratory scale batch reactor. Oxidants such as free Cl, ClO₂, H₂O₂ and O₃ were measured. The results showed that all of the water quality parameters of cooling tower had deteriorated disinfection of Legionella pneumophila. When the turbidity, CaCO₃ and TOC was increased, oxidants which was generated during electrolysis was decreased. pH, free Cl, ClO₂ and H₂O₂ concentration were decreased with the increase of pH, whereas O₃ concentration was increased with the increase of pH. The order of effect of water quality on the disinfection performance for Legionella pneumophila was turbidity > CaCO₃ > TOC > pH. To obtain the safety standard (1000 CFU/L), the simultaneous increase current and NaCl dosage was needed.

The aim of this paper is to evaluate users' benefit values of theme park using Travel Cost Method with special reference to Woobang Tower Land in Taegu for the estimation of economic values. This research is mainly based on questionnaire survey of 100 users of the theme park. Socio-economic factors such as income, year of education, annual income, age and money(travel cost) are analysed from 5 residential areas of the respondents. Multiple regression analysis was used for the evaluation of annual number of park visitings based on the analysis. The regression model shows NV = α + β1TC + β2INC + β3EDU + β4AGE (NV : Annual Number of Visitings, TC : Travel Cost, INC : Annual Income, EDU : Years of Education, AGE : Age). Regarding to visitors demand curve based on the equation showed that annual economic values of Woobang Tower Land was estimated as 50billion Korean Won.

Packing tower has been used in the chemical industry and the protection of environment for a long time. In the view of environmental protection, purification of exhaust gas can be performance effective by gas absorption in counter-current packing tower. In this study, characteristics of hydraulic and mass transfer were investigated in D. 0.3m × H. 1.4m packing tower with 50mm plastic Hiflow-ring. This study was carried out "Test systems were experimented in conditions of Air, Air/H2O, NH3-Air/H2O, NH3-Air/H2O- H2SO4, and SO2 -Air/H2O-NaOH under steady state". The extent of test included dry and wetting pressure drop, physical law, separation efficiency, and hold-up as function of gas and liquid load.

In this study a packed tower was selected for the treatment apparatus of NH3 gas produced in industry. Formerly, latticework packing has been used in preventive facility of treatment of NH3 gas. However, recently metallic Ralu-Pack 250YC, structured packing, is usually being used in petrochemical production plant. This study is for the application the packing to the NH3 gas treatment in wet scrubbing process. In Air/water system, hydraulic pressure drop dependent of specific liquid load and gas capacity factor was continuous and parallel from graph. The tower height can be determined by the number of transfer unit and the height of transfer unit influenced on liquid distribution.