• Elastomers and Composites
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• 제50권2호
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• pp.87-91
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• 2015

Cure characteristics of non-oil-extended solution SBR (S-SBR_NO) and oil-extended solution SBR (S-SBR_ EO) compounds reinforced with silica/carbon black were investigated. Minimum and maximum torques of S-SBR_ EO compounds were much smaller than those of S-SBR_NO ones. Delta torques of S-SBR_NO compounds were greater than those of S-SBR_EO ones, and that of S-SBR_NO compound increased with increase in the 1,2-unit content. Optimum cure time ($t_{90}$) of S-SBR compound decreased with increase in the 1,4-unit content, whereas it increased with increase in the 1,2-unit content. Cure rate index of S-SBR compound increased with increase in the 1,4-unit content, whereas it decreased with increase in the 1,2-unit content. Comparing cure characteristics of S-SBR_NO and S-SBR_EO compounds with the same 1,2-unit content, $t_{90}$s of S-SBR_EO compounds were longer than those of S-SBR_NO ones and cure rate indices of S-SBR_EO compounds were smaller than those of S-SBR_NO ones.

• 한국주거학회:학술대회논문집
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• 한국주거학회 2005년도 추계학술대회 논문집
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• pp.171-175
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• 2005

The purpose of this study was to suggest the Support and Infill system for 126.6m$^2$-sized housing unit which meets residents' variety. The subjects were 100 housewives who lived in 126.6m$^2$-sized housing unit in the apartment complex, Busan. The data was collected by using model and questionnaire. The model was made to be same as the current 126.6m$^2$-sized floor plan. The residents preferred the flexible housing unit apartment complex. Also, the residents' needs for floor plan of housing unit were various. Therefore, the development of flexible housing unit is needed. On the basis of these findings, the support and infill system for 126.6m$^2$-sized housing unit was suggested.

• 한국실내디자인학회:학술대회논문집
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• 한국실내디자인학회 2003년도 춘계학술발표대회 논문집
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• pp.74-77
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• 2003

After the Enforcement of Price Deregulation of Apartment, Apartment house get down to originality goods, The Housing Market have reorganized the nucleus by a user, have demanding the development for discriminative unit plan. The purpose of this study is that before and after the Price Decontrol of Apartment take part a variety of unit plan, search for transformation factor and analyze into the tendency of the distinction plan of Housing Goods. Before and after the Price Decontrol of Apartment, Apartment unit have analyzed from 85 $m^2$ till 152 $m^2$ private area; ten corporations of civil construction' unit in Seoul and The national capital region supply apartment, will supply apartment. For selected examples, first, unit plan is normalized from the ratio of front to side wall, bay, a Room' organization and a kind of Room, number, and for examples of unit plan of apartment, the examples were analyzed with respect to change of a Room' organization and the number of a room and the ratio of front wall to side wall for item investigated. Finally, I search out course of transformation tendency of an apartment unit plan after Enforcement of Price Deregulation and analyzed a factor. The results of the study are follows, after Enforcement of Price Deregulation, unit plan of apartment lead to change lay out, to secure each family's privacy, to secure feeling for open hearted, tendency of flexibility.

• 콘크리트학회논문집
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• 제12권5호
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• pp.25-34
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• 2000

When concrete is placed underwater, it is diluted with separating cementitious material and as a result the quality of concrete becomes poor. To solve this problem, antiwashout underwater concrete is increasingly used for the construction and repair of the concrete structure underwater. The objective of this study is to investigate the characteristics of antiwashout underwater concrete as to the mix proportion, casting and curing water through experimental researches. The unit weight of water and cement, water-cement ratio, fine aggregate ratio, unit weight of antiwashout underwater agent and superplasticizer, and casting and curing water were chosen to measure the suspended solids, pH, air contents, slump flow, unit weight of hardened concrete, and compressive strength. From this study, the incremental modulus at mix proportion design and unit weight of antiwashout underwater agent were increased more than fresh water, and it is a optimum mix proportion that the unit weight of water(and cement) is 230kg/$\textrm{m}^3$(460kg/$\textrm{m}^3$), waterOcement ratio is 50%, fine aggregate ratio is 40%, unit weight of antiwashout underwater agent is 1.2% of water contents per unit weight of concrete, and unit weight of supeplasticizer is 2.5% of cement contents per unit weight of concrete when the antiwashout underwater concrete is used for the underwater work of ocean.

• International Journal of Contents
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• 제8권3호
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• pp.100-104
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• 2012

In this paper, a unit cell for low pass filter design by using composite right and left-handed transmission line in conductor-backed coplanar waveguide is proposed. The characteristics of the unit cell are analyzed in order to design a low pass filter in small sizes. By changing the sizes of the unit cell, the parameters of right-handed and left-handed immittance components are changed and the desired characteristics of the unit cell are achieved. The equivalent circuit of the unit cell is extracted and analyzed either. As a result, the simulation results of the unit cell and the equivalent circuit are almost identified. The movement and energy distributions of electromagnetic field are shown to confirm the property of the unit cell. In the end, a low pass filter is demonstrated by cascading three proposed unit cells, which shows cutoff frequency of 1.53GHz and deep attenuation from 2.23GHz to 4.49GHz lower than -50dB.

• 의료ㆍ복지 건축 : 한국의료복지건축학회 논문집
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• 제7권2호
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• pp.37-45
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• 2001

The hospice movement evolved as an alternative to hospitals as places to die. Recently, the palliative care for dying and hospice has been developed rapidly and placed itself as one of the medical systems. But the studies on hospice program and establishment method in Korea are few or no in comparison with developed countries. Hospice unit within a general hospital is more efficient hospice type than other terminal care establishments, therefor it will be developed rapidly. With this in mind, this study puts elements of architectural planning on the hospice unit for the space requirements. Also, It is investigated the architectural conditions of hospice unit within a general hospital, analyzed the unit space and spatial composition in hospice unit. The purpose of this study is to propose the fundamental data and unit space for architectural plan and design.

• 한국식품과학회지
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• 제31권1호
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• pp.115-121
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• 1999

준저리콩, 익산콩을 사용하여 콩나물 재배 과정 중 유리당 함량변화와 lipoxygenase activity 변화를 측정하였고, 키토산 처리가 이들에 미치는 영향을 조사하였다. 재배 3일째 자엽에서 sucrose는 71% 감소하였고 배축은 59%가 감소하여 배축보다는 자엽에서 더 빠른 감소 경향을 볼 수 있었다. Raffinose와 stachyose는 재배 초기 빠른 속도로 감소하다 이 후 감소가 완만해졌으며 배축보다는 자엽에서의 분해속도가 빠르게 나타났다. 키토산을 처리하여 콩나물을 재배하였을 때 4일 후 분해되지 않은 유리당이 sucrose와 raffinose의 경우 키토산 처리구가 대조구보다 각각 9.8, 16% 정도 많이 남아 있었으나, stachyose의 경우 대조구에 18%정도 많이 잔존하였다. Lipoxygenase activity는 L-2/3보다 L-1의 activity가 높게 나타났으며, 24시간 침지후 자엽의 L-1 activity가 1207 unit/mg에서 2072 unit/mg으로 높아졌으나 발아가 진행되면서 activity는 감소하였다. L-2/3의 activity는 재배 초기에 자엽에서 492 unit/mg, 배축에서 67 unit/mg이였으나, 재배 5일 후에는 자엽과 배축의 activity가 42, 82% 각각 감소하였다. 키토산 처리가 lipoxygenase activity에 미치는 영향을 보면 off-flavor 형성과 밀접한 관련이 있는 L-2/3 activity가 재배 5일 후 대조구 83 unit/mg, 키토산 처리구 56 unit/mg 으로 되어 키토산 처리구의 활성이 낮았다.

• 한국물환경학회지
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• 제25권5호
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• pp.689-696
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• 2009

Unit load approach has been used to estimate the non-point pollutant load in Total Water Pollution Load Management System (TWPLMS). In this study, locally applicable unit loads for road and parking lot were developed based on the measurements of 9 rainfall events from 2007 to 2008 in Yongin city of Gyeongan stream watershed. Observations showed that stormwater runoff began at low precipitation (>1 mm) and peak pollutant concentration occurred at the beginning of the runoff because of impervious nature of the sites. Averaged event mean concentrations (EMCs) of road (parking lot) were estimated as COD 105.36(62.69) mg/L, BOD 15.94(13.20) mg/L, TSS 183.45(66.52) mg/L, T-N 4.63(3.28) mg/L, T-P 0.45(0.39) mg/L. Higher EMCs at the road than parking lot may reflect heavier traffic. Unit loads Estimated from the EMCs and 10 year average rainfall data were COD $331.17kg/km^2{\cdot}day$, BOD $50.20kg/km^2{\cdot}day$, TSS $580.13kg/km^2{\cdot}day$, T-N $14.68kg/km^2{\cdot}day$, T-P $1.43kg/km^2{\cdot}day$ in the road and COD $186.59kg/km^2{\cdot}day$, BOD $39.22kg/km^2{\cdot}day$, TSS $199.15kg/km^2{\cdot}day$, T-N $9.70kg/km^2{\cdot}day$, T-P $1.16kg/km^2{\cdot}day$ in the parking lot. The estimated unit loads are not so comparable to the ones listed in TWPLMS technical guideline and published data that locally developed unit loads should be used to estimate non-point pollutant loads.

• 한국주거학회논문집
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• 제25권2호
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• pp.27-36
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• 2014

The revision of regulations for apartment unit design, which are concerning the area calculating criteria (revised in 1998) and use of balcony (revised in 2005), considerably have increased livable space of apartment unit. This paper aims to verify its effect to apartment unit plan in the aspect of number of rooms and size of each room. For this purpose, 60 and 85 $m^2$ sized apartment unit plans in Seoul Gangnam district have been analysed by construction period, and a conclusion is drawn out as following; (1) The revison of regulations in 1998 and 2005 increased livable space of 60 and 85 $m^2$ sized apartment about 16.4~20.6 $m^2$ area. (2) Bedrooms, living room, dining room and kitchen have no change in size in nominal sense, actually, they increase their size after the fact by converting balcony to livable space. (3) Bathroom, dress room and entrance space have been considerably increased in size, which is possible for available area added in place of wall footprint according to 1998 revision.

• Journal of Advanced Marine Engineering and Technology
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• 제33권1호
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• pp.131-137
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• 2009

In this paper, we have manufactured hole type PRAM unit cell using phase change material $Ge_2Sb_2Te_5$. The phase change material $Ge_2Sb_2Te_5$ was deposited on hole of 500 nm size using sputtering method. Reset current of PRAM unit cell was confirmed by measuring R-V characteristic curve. Reset current of manufactured hole type PRAM unit cell is 15 mA, 100 ns. And electro and thermal characteristics of hole type PRAM unit cell were analyzed by 3-D finite element analysis. From simulation temperature of PRAM unit cell was $705^{\circ}C$.