We purpose a decision model to select the optimal facilities for the Decision Making problems with multiple characteristics(nominal-is-best characteristics, larger-is -better characteristics, smaller- is -better characteristics). Using this model, concept of the loss function is used in this comprehensive method of for select the optimal preferred facilities. To solve the issue on the optimal preferred facilities for multiple characteristics, this study propose the loss function with cross-product terms among the characteristics and derived range of the coefficients of the terms.

1998년 11월부터 1999년 12월까지 13개월 동안 대형 수생식물인 애기부들의 분해와 분해 과정에 따른 각 기관별 영양염류 함량의 변화를 조사하였다. 13개월 후 잎, 줄기, 지하경의 잔존량은 각각 34.7%, 59.2%, 7.2%로 줄기의 분해가 가장 느렸고 지하경의 분해가 빠른 것으로 나타났다. 분해상수는 잎, 줄기, 지하경이 각각 1.06, 0.52, 42.63yr-1이었다. 잎, 줄기, 지하경의 초기 영양염류 함량은 질소 11.5,

he purpose of this experiment was to examine the antimicrobial effect of the natural flavonoid hesperidin on dental caries and alveolar bone resorption in the albinorats. Twenty five day old male rats were fed with the experimental diets for 42 days. At the end of the 42 day experimental period, the molar tooth occlusal surface was examined by a dissecting microscope. The sulcular caries lesions were recorded: the first molar caries incidence was higher than that of the second molar and the third molar. Alvelolar bone resorption was measured on the buccal and lingual aspects of each molars. Three measurements were taken on the first molar (mesialpoint, midpoint, distalpoint). The results of this experiment, showed that hesperidin is effective in reducing dental caries and alveolar bone resorption.

This study was conducted to investigate the effects of the pasture types and the leveling methods of winding slope land for seedbed on the runoff, soil loss, botanical composition, dry matter yield of forage and economical value at the Experimental Field

This paper intends to evaluate the seakeeping performance in consideration of nominal speed loss of ships in a seaway. Authors calculate the nominal speed loss in the Sea State of Beaufort Scale 6, 7 & 8 and obtain each response amplitude of ship;s motion by New Strip Method in consideration of them. This study presents some results of the seakeeping performance by the maximum dangerouseness of ships on each sea state.

고주파 저손실 재질로 사용되고 있는 Mn-Zn 페라이트의 제조공정 중 소결조건과 Ta2O5첨가가 Mn-Zn 페라이트의전력손실에 미치는 영향에 대해서 연구하였다. 등조성선을 따라 냉각하기 위하여 컴퓨터를 사용해서 정확하게 산소분압을 조절하였으며 적절한 등조성선을 선택함으로써 보다 좋은 손실특성을 얻을 수 있었다. CaO-SiO2 첨가계에 Ta2O5를 0ppm에서 400ppm으로 변화시켜 가며 첨가하였으며, Ta2O5 가 400ppm 첨가되었을 경우 균일한 grain 성장과 더불어 낮은 전력손실을 나타내었다. 온도에 상응하는 상평형 산소분압을 정확히 맞춰 냉각할 경우 전력손실 최소값이 질소 분위기에서 냉각시킨 시편보다 높은 온도쪽으로 이동됨도 확인할 수 있었다.

Some weight loss accelerating agents, dodecyltrimethylammonium chloride(DTAC), dodecyltrimethylammonium bromide(DTAB), dodecyldimethylammonium chloride(DDBAC), polyoxyethylene(2) dodecylbenzylammonium chloride(PDBAC), and 1-(2-hydroxyethyl)-1-benzyl-2-undecylimidazolinium chloride(AEUIC), were synthesized. As a result of weight loss treatment of the weight loss accelerating agents with NaOH to PET fiber, the increase of weight loss was the order of PDBAC > DDBAC > DTAC > DTAB > AEUIC. Among the weight loss accelerating agents, AEUIC hardly showed weight loss effect, and it was separated into two layer in the NaOH solution at the treatment concentration above 6g/L, but POBAC showed good weight loss effect of 21% that approach almost to a theoretical weight loss, 21.6%, at the concentration above 8g/L.

MDABM and MDAEW, as a accelerating weight loss agents, were prepared by adding water to myristyldimethylbenzylammonium bromide(MDAB) and myristyldimethylethylammonium ethyl sulfate (MDAE) synthesized. As a result of weight loss finishing of the MDABW and MDAEW with NaOH on PET fiber, the ratio of weight loss of MDABW was very larger than that of MDAEW. This result showed that quaternary ammonium bromide had higher weight loss effect than quaternary ammonium sulfate, and the ratio of weight loss was greatly varied with the kind of quaternary ammonium salts used. In these conditions, proper treatment concentration, treatment time, and treatment bath ratio were about 8g/l, 6O~90min, and 40:1~50:1, respectively.

n-Octyldimethylbenzylammonium chloride, dodecyldimethylbenzylammonium chloride, and octadecyldimethylbenzylammonium chloride were synthesized to be used as the accelerating weight loss agent. These synthesized compounds were used for the weight loss treatment of PET textile with sodium hydroxide. From the treatments, it was found that the lower carbon number of high alkyl group existed in quaternary ammonium salts, the better effect of weight loss was acquired. The proper concentration of accelerating weight loss agent was 8~10g/l, the proper treatment time was 60~90 minutes, the proper treating bath ratio was 1 : 50. It is proved that n-octyldimethylbenzylammonium chloride and dodecyldimethylbenzylammonium chloride are good accelerating weight loss agent.

고분해능 전자에너지손실 및 자외선광전자 분광법을 사용하여 단결정 NbC(111)면의 산소횹착을 연구하였다. NbC(111) 표면에는 산소가 원자 및 분자상태로 흡착되었다. 산소원자는 3-fold hollow site에 흡착되며 진동수는 548cm-1이었다. 산소분자의 신축진동수는 968cm-1로서 기체상태인 산소분자의 진동수보다 크게 낮았으며, 산소분자의 흡착으로 일함수가 증가하였다. 이는 NbC(111) 기판으로부터 산소분자의 2ppig 궤도로 전자가 이동하였음을 보여주는 증거이다.

In this paper, the relationship between static pressure recovery and turbulent energy was presented in case of swirling flows into a conical diffuser. The distributions of turbulent energy in a diffuser sectional area were measured by a hot wire anemometer. The following conclusion can be drawn from the experiment. Diffuser loss is constituted by a dynamic pressure loss and total pressure loss. The static pressure recovery depends strongly on the total pressure loss. The static pressure recovery depends strongly on the total pressure loss, and the turbulent energy varies inversely as the static pressure recovery coefficient.

고분해능 전자에너지손실과 자외선광전자분광법을 사용하여 단결정 ZrC(111)면의 산소흡착을 연구하였다. 산소는 낮은 산소노출량에서 (√3×√3)R30˚ 구조로 흡착된다. 노출량이 승가하면 1×1 구조로 바뀌는데 이때 흡착하는 산소원자는 (√3×√3)R30˚ 구조에서보다 흡착높이가 낮으며 3-fold hollow site의 중심에 놓이지 않고 bridge site에 가까와진다. 서로 다른 산소흡착 거동은 개끗한 ZrC(111) 표면에서 두개의 표면전자상태에 기인한다.