• 오토저널
• /
• 제14권1호
• /
• pp.54-63
• /
• 1992

Force distribution of incomplete meshing teeth for the OHC drive timing belt system is investigated analytically. Finite difference equations of the belt tension are derived based on the force equilibrium and the deformation of the belt tooth. From the numerical results, it is found that of the force distribution prior to the boundary point shows higher values compared with those of the complete meshing state and the force distribution after the boundary point shows lower values. Also, the magnitude of the incomplete meshing region increases as the rotational speed increases and the tight side belt tension decreases.

• 한국철도학회:학술대회논문집
• /
• 한국철도학회 1998년도 창립기념 춘계학술대회 논문집
• /
• pp.249-256
• /
• 1998

Design target values of transmission loss in a high-speed train wall are suggested by calculating the difference between interior and exterior noise levels of it. Exterior noise level distribution on the boundary of train wall is calculated by Sysnoise, with sound source input prepared by experiments. Two kinds of exterior sound sources are considered, the rolling noise of train wheels on the rail and the aerodynamic noise from the pantograph. Interior noise level is provided by high-speed design target. Transmission loss characteristics according to the frequency band are examined.

• 한국콘텐츠학회:학술대회논문집
• /
• 한국콘텐츠학회 2019년도 춘계종합학술대회
• /
• pp.275-276
• /
• 2019

The purpose of this study was to assess condylar size in volumetric 3D imaging in patients with class I, class II, class III malocclusions. To evaluate the differences among the three experimental groups, the condylar values of men were analyzed. There was a significant difference in the measured values of height. Among the three experimental groups, the condylar measurements in women showed significant differences in height and width. This study is expected to be used for determining the connection between malocclusion and condyle as a base line data.

• 한국기계가공학회지
• /
• 제17권2호
• /
• pp.30-36
• /
• 2018

Since the freezer compartment and the refrigerating compartment are located side by side in a side-by-side refrigerator, the problems of the door height difference (DHD) and door flatness difference (DFD) have been constantly raised. Deformation of the cabinet of a built-in side-by-side refrigerator under food and thermal loads was analyzed by the finite element software ANSYS. The DHD and DFD, occurring due to the deformation of the cabinet, evaluated. From the results of the analysis of the cabinet, the 3D CAD software CATIA was used to geometrically translate and rotate the freezing and refrigerating compartment doors, in consideration of the displacement of the hinge fastening point. Then, the coordinates of two points on the upper corner of the doors were determined, and the DHD and DFD were obtained. It found that the thermal load, occurring under normal operation conditions, decreases the door height difference, but increases the door flatness difference. Values of the analyzed DHD and DFD appear smaller than the acceptance criteria used by the refrigerator manufacturer.

• Journal of Chest Surgery
• /
• 제23권5호
• /
• pp.854-863
• /
• 1990

Since the open heart surgery was performed, various kinds of problem concerning the extracorporeal circulation[EGG] have been known. The author investigated the changes of serum potassium ion before and after ECC among the 102 patients including 63 adults and 39 children who underwent open heart surgery from April 19S6 to February 1990 in Chung-Ang University Hospital. The mean values of potassium ion before and after ECC were analyzed according to the influencing factors such as priming solution, aortic cross clamping time, the underlying disease, the type of oxygenator and the amount of cardioplegic solution. The results were as follows: l. In the aspect of congenital and acquired heart disease groups, the mean values of serum potassium ion[Mean\ulcornerS.D.] before and after ECC revealed a significant change only in the acquired heart disease group[congenital; 3.87$\pm$0.48mEq /L vs. 4.05$\pm$0.73mEq /L, P>0.05, acquired: 4.40 $\pm$0.98mEq /L vs. 4.11$\pm$0.52mEq /L, P<0.05]. Between the two groups, the changes of the mean values of serum potassium ion before and after ECC were significant[P<0.05]. But all values were within normal limits. 2. In the aspect of the aortic cross clamping time[ACCT], in the groups of less or more than 120 minutes, the mean values of serum potassium ion before and after ECC revealed no significant change[less than 120 min; 3.97+-0.64mEq /L vs. 3.99+0.67mEq /L, P>0.05, more than 120 min; 4.34+0.82mEq /L vs. 4.27+0.62mEq /L, P>0.05], and The changes of mean values of serum potassium ion between the two groups were not significant[P>0.05]. 3. In both membrane and bubble oxygenator groups, the mean values of serum potassium ion before and after ECC did not reveal a significant difference respectively [membrane; 4.74 +1.40mEq /L vs. 4.28+0.3lmEq /L, P>0.05, bubble; 4.02 +0.60mEq /L vs. 4.05 L0.68mEq/L, P>0.05], and no differences between the membrane and bubble oxygenator groups[P >0.05]. 4. In the groups of membrane and bubble oxygenator in the cases of ACCT more than 120 minutes, the mean values of serum potassium ion before and after ECC did not reveal a significant difference respectively[membrane; 4.36$\pm$0.85mEq /L vs. 4.37$\pm$0.26mEq /L, P>0.05, bubble; 4.30 $\pm$0.80mEq/L vs. 4.23$\pm$0.67mEq/L, P>0.05], and no differences between the two groups[P>0.05]. 5. In spite of increased amount of cold potassium cardioplegic solution, the mean values of serum potassium ion before ECC were similar to those of serum potassium ion after ECC[less than 20ml /kg

• 대한치과교정학회지
• /
• 제12권2호
• /
• pp.145-154
• /
• 1982

Plaster models were constructed and orthopantomographs were taken for 86 male and 70 female primary school pupils, whose upper and lower permanent 4 incisors and 1st molars were completely erupted without crowding; whose deciduous canines and molars were found almost uniformly even without any visible tooth fractures, dental caries or restorations on proximal surfaces of the teeth. Certain reference points on the orthophantomograph were set up and measured and the values were compared with actual or predicted values from the models. The following results were obtained: 1. In regards to available space, the values from the orthopantomograph were greater than the values from the models by a mean of 3.24% on the upper and 10.06% on the lower for males; 3.05% on the upper and 10.01% on the lower for females. 2. In regards to total mesiodistal widths of permanent canine, 1st and 2nd premolars, the values from the orthopantomograph were greater than the presumed values based on the size of lower permanent 4 incisors from the models by a mean of 18.50% on the upper and 24.09% on the lower for males; 14.54 on the upper and 20.51% on the lower for females. 3. Comparing the magnified values of total mesiodistal widths of permanent canine, 1st and 2nd premolars with those of available space, the regression constants of regression equation (Y = a + bX) between them were a=3.2336, b=0.6533 on the upper and a=5.0138, b=0.3290 on the lower for males; a=2.5994, b=0.6521 on the upper and a=3.0113, b=0.6586 on the lower for females. 4. The correlation coefficients between the magnified values of available space and permanent canine, 1st and 2nd premolars were moderately positive as 0.6474 in the upper and 0.505 on the lower for males; 0.6493 on the upper and 0.6183 on the lower for females. 5. In regards to magnified values of the available space from the orthopantomographs there were no significant difference between sexes, (P>0.05) but of the total mesiodistal widths of permanent canine, 1st and 2nd premolars, a significant difference between sexes was found.(p<0.01).

• 대한원격탐사학회지
• /
• 제35권6_4호
• /
• pp.1403-1415
• /
• 2019

도시인구 증가와 이에 따른 급격한 도시화는 도시 내 여러 열환경 문제를 수반한다. 이를 효과적으로 대응하기 위해 hot Spot 분석과 같은 도심 열환경 모니터링이 필요시 된다. 본 연구는 우리나라 세종특별자치시의 14개의 동과 주변 행정구역을 연구지역으로 선정하여 2013년부터 2018년 여름철의 도시 확장에 따른 지표면 온도 변화 특성을 분석하였다. Landsat 8 지표면온도와 KOMPSAT2/3 기반 NDVI(Normalized Difference Vegetation Index)및 NDBI(Normalized Difference Built-up Index)를 이용하여 연구 지역의 지표면 온도 분포를 모의하고, 도심지 확장에 따른 지표면 온도 변화 양상을 구축된 NDVI와 NDBI를 이용해 논의했다. 특히, 연구지역 안에서의 도심지 확장이 뚜렷한 지역을 연구 대상으로 선정하여 고해상도의 KOMPSAT영상으로 지역 내 hot spot의 변화 원인을 분석하였다. 연구결과, 연구지역 내에서 도시화가 진행된 지역에 hot spot이 나타나는 것을 확인하였으며 일반적으로 NDVI가 낮거나 NDBI가 높을수록 hot spot의 영향이 뚜렷하고 온도가 높게 나타나는 것으로 확인되었다. 지표면온도와 위성기반 산출물을 이용해 도시화가 지속적으로 진행된 지역과 급격하게 나타난 지역이 구분되었으며 토지피복에 따른 상이한 특성도 파악할 수 있었다. 도시화에 따른 지표면 온도 변화가 뚜렷한 지역에 본 연구와 같이 고해상도의 KOMPSAT 영상을 통한 분석이 수반되면 향후 도시계획 및 정책 활용에 효과적으로 도움을 줄 수 있을 것으로 기대된다.

• 한국식품영양과학회지
• /
• 제36권12호
• /
• pp.1604-1611
• /
• 2007

연잎가루의 첨가비율을 1, 2, 3, 4%로 달리하여 제조한 연잎 절편의 기계적, 관능적 품질특성을 4일간 저장하면서 평가하였다. 연잎절편의 수분함량은 제조 직후 대조구는 50.63%이었고, 연잎절편은 $50.17{\sim}52.63%$로 연잎가루 첨가량이나 저장기간에 따른 일정한 경향을 보이지 않았다. 연잎절편은 저장기간 동안 연잎을 첨가하지 않은 대조구보다 총균수가 더 적게 증가하였다. 연잎절편의 L값은 연잎가루의 비율이 증가할수록 유의적으로 감소하였고, 저장기간이 길어질수록 증가하였다. 연잎절편의 a값에서 연잎 가루의 비율이 증가할수록 유의적으로 증가하였고, 저장기간에 따른 a값과 b값은 일정한 경향이 나타나지 않았다. 제조 직후에는 연잎가루의 첨가비율에 따른 경도와 씹힘성은 큰 차이가 없었지만, 저장 1일부터 연잎가루를 첨가할수록 유의적으로 경도와 씹힘성은 낮아졌다. 저장 1일부터 대조구의 부착성은 유의적으로 줄어들었고, 3% 연잎절편만 제외하고 저장 2일까지 부착성에 큰 차이가 없었다. 2%와 3% 연잎절편의 탄력성은 저장 4일 동안 유의적인 차이가 없었고, 검성은 저장 2일부터 모든 구에서 유의적으로 증가하였다. 응집성은 제조 직후 대조구와 연잎절편 간에 유의적인 차이가 있었고, 저장기간 동안에는 큰 변화가 없었다. 연잎절편의 정량적 묘사분석에서 색, 향, 맛에서는 연잎가루를 첨가할수록 강도가 증가하였고, 씹힘성에는 대조구와 연잎절편 간에 유의적인 차이를 보이지 않았다. 연잎 절편의 기호도 검사에서 색, 향, 맛, 전체적인 기호도에서 2% 연잎가루를 첨가한 연잎절편이 가장 기호도가 높았다. 이상의 연구를 통해 연잎절편으로 가장 적당한 제조방법은 쌀가루 980 g, 연잎가루 20 g, 소금 10 g, 수분 360 g으로 제조한 2% 연잎절편이었다.

• 대한가정학회지
• /
• 제50권7호
• /
• pp.81-96
• /
• 2012

The purpose of this study is to understand consumer values derived from products by the contemporary consumers, as the meaning of a product is extended from the functional utilities to the mediums of fulfilling consumer values. Consumer values have been researched from the marketers' perspectives and, thus, the scales to measure consumer values tend to be too abstract and not always reflective of the consumers' perspectives. Holbrook's typology of consumer values is utilized and the products are classified into four groups according to the product characteristic of the utilitarian versus hedonic, and the consumption spaces of the indoor and outdoor. The findings are as follows. First, the values of efficiency, excellence, ethics, and spirituality are more likely derived from utilitarian products, while the value of play is more likely derived from the hedonic products. Second, the values of efficiency, excellence, and ethics are more likely derived from the indoor products, and values of playfulness, esthetics, status, and respect are more likely derived from the outdoor products. Third, the most frequently mentioned values are the efficiency, playfulness, and status. Fourth, the list of products answered as being representative for four types of products are short to include obvious products such as TV, mobile phone, computer, car, refrigerator, and MP3 player. Both the utilitarian and hedonic values are derived from TV, computer, and mobile phone, while the utilitarian value from refrigerator and car, and the hedonic value from MP3 player, digital camera, and game consoles. The results imply that consumer values should be carefully understood and reflected in developing new products in order to successfully fulfill consumers' underlying needs and requirements.

• 한국콘텐츠학회논문지
• /
• 제9권8호
• /
• pp.376-383
• /
• 2009

개인의 가치관은 개인의 태도, 행동, 생활방식 등에 결정적인 영향을 미치며, 개인의 세계관을 반영한다. 따라서 조직에서의 개인의 행동과 행동적 경향성에 개인의 가치관이 반영되기 마련이기 때문에 가치관이 조직에 강력한 영향을 미친다고 할 수 있겠다. 또한 경찰 조직문화 역사 경찰관들 개개인의 가치관에 영향을 받게 된다. 이 연구의 목적은 이러한 경찰 조직문화 및 가치관의 개선을 위한 선행적 연구로서 경찰관의 가치관에 대한 국내의 선행 연구가 매우 미흡한 실정에서 우리나라 경찰관들의 가치관의 특성을 살펴보고, 유일한 선행 연구라 할 수 있는 한상암 정덕영(2007)의 연구 결과와 비교 분석함으로써 공통 특성 및 차이점을 파악하여 후속 연구의 토대로 삼고자 하는 것이다. 이 연구에서는 선행 연구의 연구 결과와 비교하여 다음과 같은 결과가 드러났는데, 선행 연구결과들과 마찬가지로 경찰관들이 전반적으로 사회적 가치보다는 개인적 가치를 더 중시하는 경향이 있으며, 평등은 기존의 열구결과들과 다소 다르게 중간정도의 순위로 나타났으며, 국가의 안전은 대부분의 선행 연구결과들과 마찬가지로 매우 낮은 순위로 나타났다.