• The Journal of the Institute of Internet, Broadcasting and Communication
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• 제19권5호
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• pp.115-121
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• 2019

In this paper, we propose MSAG-SCS-MMA-I adaptive blind equalization with double step size with very small residual ISI and MSE at steady-state while significantly improving the convergence speed of the traditional SCS-MMA-I algorithm in 256-QAM system. And we evaluate the equalization performance for this algorithm. Different step sizes according to the absolute value of decision-directed error instead of a fixed step-size are applied to the tap update equation of MSAG-SCS-MMA-I, which is controlled by binary flags of '1' or '0' obtained from SCS-MMA-I and decision-directed algorithms. This makes for excellent equalization performance. As a result of computer simulation, we confirmed that the proposed algorithm has more better performance than the MMA, SCS-MMA-I, and MSAG-SCS-MMA-I algorithms in terms of the performance index such as residual ISI, MSE, and MD.

• Proceedings of the Korea Water Resources Association Conference
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• 한국수자원학회 2018년도 학술발표회
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• pp.212-212
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• 2018

설계홍수량 산정요령(MLTMA, 2012)이 배포된 이후 실무에서는 홍수량을 산정할 때, Clark 단위도(Clark, 1945)를 적용하는 것으로 획일화되는 추세다. SCS 단위도(SCS, 1972)가 설계홍수량 산정요령에서 배제된 것은 Clark 단위도와 비교해서 도달시간 등 유역 매개변수를 같게 대입하더라도 홍수량이 과다 산정되는 경향 때문이다(e.g., Singh, 2000; Kilduff et al., 2010; Bhunya et al., 2011). 그럼에도 불구하고 SCS 단위도는 단변량 모형으로 적용 방법이 매우 간단하고, 실무에서 주로 사용되는 상용프로그램 대부분에 내재되어 있는 등 실무에서의 효용가치가 높은 편이다. SCS 단위도의 높은 첨두홍수량을 조정하고자 첨두시간 산정 공식을 수정한 SCS 방법이 제안되었으나(e.g., Ministry of Construction, 1992; Jung and Moon, 2001), 이는 첨두시간이 크게 산정되도록 하여 첨두홍수량을 낮추려는 시도로 도달시간, 기저시간 등 유역의 물리적인 특성을 왜곡한다. 반면에 SCS 단위도의 기울기(Peak Rate Factor; PRF)는 유역 경사에 따라 300에서 600 사이의 값을 갖게 되고 평균값으로 484가 제안되었으나(SCS, 1972), 이를 맹목적으로 사용하기에는 무리가 있다. 실험을 통해서 75-100, 284, 100-575 등 다양한 범위의 PRF 값이 제시되었고(e.g., Woodward et al., 1980; Wanielista et al., 1997), PRF에 직접 비례해서 첨두홍수량이 결정되는 SCS 단위도의 특성을 고려할 때, 유역의 조건에 맞는 적절한 PRF를 산정하는 것이 우선이다. 본 연구에서는 SCS 단위도의 첨두시간과 같은 종속변수 대신 PRF를 조정하는 방법에 주목해서 Clark 단위도로 산정된 홍수량과 서로 상호보완이 될 수 있도록 국내의 유역 환경에 적합한 SCS 단위도 적용 방안을 제시하고자 한다.

• Journal of the Korean housing association
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• 제15권1호
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• pp.95-102
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• 2004

The purpose of this study is to actualize the planning method of the shared community space (SCS). For this, it analyzed the residents' needs for the SCS and grasped the composition system of the needs and estimated the factors considered in the planning of the SCS. This study focused on seeking out the user-oriented design criteria for the planning of the SCS. The results of this study are as follows: First, as the results subdividing the residents' needs to understand the various requirements for the SCS, the composition system was classified into the fundamental SCS and the individual SCS. The fundamental SCS's to be considered as basic facilities in the planning of the multi-family housing complex, and the individual SCS to be more suited to a particular group. Second, regarding the investigation of detail guidelines in the SCS planning, it was found that there was a difference in the considered factors and the preferred locations according to the kinds of each SCS, the types of facilities, the main users of facilities, and the contents of activities available in the facilities.

• Progress in Medical Physics
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• 제10권1호
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• pp.47-54
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• 1999

Purpose: To verify the BRW coordinates of target located within the limit of XKnife hardware, and to verify the successful transfer of image data, rod detection, anatomical structure when CT images are transferred into a XKnife computer. Materials and Methods: Target coordinates of 13 patients were calculated by SCS1 computer through the rod image on the console screen and film. BRW coordinates of target and landmark calculated by SCS1 computer were compared to those acquired by XKnife localizer. Results : Vertical components of BRW coordinates of target for 13 patients are larger than -50 mm, and then the vertical components of BRW coordinates of target are localized within the limit of XKnife hardware. Average differences between XKnife and SCS1 for BRW coordinates of target and landmark were within 1 mm for AP and LAT components, 0.5 mm for VERT component. Conclusion : It was verified that the SCS1 computer is adequate tool to calculate BRW coordinates of target quickly. And by the comparison between SCS1 computer and XKnife localizer, it was verified that the image transfer into the XKnife computer was performed successfully.

• Proceeding of Spring/Autumn Annual Conference of KHA
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• 한국주거학회 2002년도 추계학술발표대회
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• pp.235-240
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• 2002

The purpose of this study is to find out users' preference of the shares community space(SCS) for the Community Design. For this, it was analyzed the residents' behavior characteristics of the current multi-family housing and the residents' needs of the SCS. This study focused on seeking out the user-oriented design criteria for the planning of the SCS. The survey was carried out with a structured questionnaire including sketch map from Aug. 13, 2001 to Sept. 14, 2001. The subjects were housewives who's living in Haeuondae of Busan, Korea. Total number of 650 questionnaires were collected and analyzed. Especially 439 cases among them were used for analysis of mental map. The SPSS PC＋ was used for the analysis of data. The results of this study are as follows : First, as to the users' behavior for the SCSs, there is a difference in the location of residents' activities by contents of them. And, the range of these locations categorized according to levels of spacial cognition for neighborhoods. Second, as to the analysis of the SCS through a mental maps, it was shown that the residents' pathway and the residents' location are main variables to be considered in the SCS planning. The preferred location of SCS is organized according to the character of the SCS; the one for most residents, is located the surrounding of main enterance or the center of the housing complex, and the one the neighbors living in the same or the near building is located in area of the block of resident buildings. Third, as the results of residents' needs analysis, the SCS has the meaning of community facilities. And there is a difference in the degree of necessity and in the preferred location according to character of the SCS. In detal, for the indoor SCS of a resident building, there is a difference in the preferred location according to the kinds of each SCS. And for the outdoor SCS, it is necessary to divide the planning zone of the SCS into 3 steps(the resident building, the block of resident buildings, and the housing complex).

• Journal of Korean Society for Geospatial Information Science
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• 제12권1호
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• pp.39-44
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• 2004

The SCS-CN method was known to have difficulties to the applied to the mountainous area like Korean river basins. This study focused to develop a distributed SCS-CN method considering river basin slopes from GIS data. For the purpose, the method was applied to Sulma river and compared with area weighted average method and distributed SCS-CN method using GIS. According to the results, SCS-CN method considering river basin slopes provided better effects on the estimating effective rainfall on the other methods. The necessity of the generalization of the results to the other rivers was discussed.

• Journal of the Korean Society of Food Culture
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• 제28권1호
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• pp.99-106
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• 2013

The effects of stevioside-containing sweetener (SCS) on kimchi quality were evaluated by investigating acid production, growth of lactic acid bacteria, sensory properties, and several volatile odor component (VOC)s of SCS-added kimchi. The concentrations of SCS added to kimchi instead of 1% white sugar were 0.165, 0.33, 0.66, and 1.32% (w/w). The pH of kimchi with higher amounts of added SCS generally increased, and the acidity of kimchi with higher amounts of added SCS generally decreased. Addition of higher amounts of SCS generally inhibited the growth of lactic acid bacteria in kimchi. Scores of overall acceptability for 0.33 or 0.66% SCS-added kimchi were significantly higher than those for other samples (p<0.05), whereas those for 1.32% SCS-added kimchi were significantly lower than those for other samples (p<0.05). The optimum concentration of SCS added to kimchi appears to be 0.33%. Among major VOCs identified in kimchi, the concentrations of seven components including ethanol generally decreased with addition of higher amounts of SCS, whereas that of diallyl disulfide was not changed markedly. The major VOCs contributing to desirable sensory properties of kimchi were likely dimethyl disulfide and diallyl sulfide.

• Journal of the Korean housing association
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• 제13권3호
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• pp.103-113
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• 2002

The purpose of this study is to find out the characteristics of users'behavior for the planning of the shared community space(SCS). It was analyzed and estimated that the present status of the SCS of the contemporary multi-family housing sites in Korea and the residents'behavior in the SCS. Theoretic investigation and empirical research methods were used in this study. The empirical survey focused on seeking out user-oriented design criteria, based on the analysis of residents'usage behavior for the SCS. The analysis was made by both quantitative and qualitative methods. The results of this study are as follows; First, as to the usage status survey for the SCS, there is a difference in the degree of usage according to their locations. Second, as to the analysis of the SCS through a mental map, the sketch map analysis is found to be a useful research method for the SCS planning by actualizing the residents'behavior characteristics. In detail, the main characteristics in the SCS planning are nearness, centrality, intimacy, combination of facilities and the connection with the main paths of the complex.

• Korean Journal of Animal Reproduction
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• 제15권1호
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• pp.1-6
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• 1991

This study was carried out to investigate the effects of Ca, BSA, heparin, semen storage and individual bull on motility and acrosome reaction of bovine fresh sperm and sperm stored in lactose-egg yolk solution(LES) at 5$^{\circ}C$ for 4hours, and the results obtained were as follows: 1. When sperm was incubated in SCS containing Ca, BSA, Ca + BSA, heparin, heparin + Ca, heparin + BSA, and heparin + Ca + BSA for 15 minutes, there was significant difference in sperm motility among the treatments, especially BSA showed significantly higher sperm motility than the others. Also there was significant difference in sperm acrosome reaction among the treatments, especially BSA and Ca + BSA showed significantly higher sperm acrosome reaction than the others. 2. Bull KNC 1 showed significantly higher sperm motility than KNC 1, HOL 1 and 2 in both fresh and stored semen, however KNC 1 showed significantly lower sperm acrosome reaction than KNC 1, HOL 1 and 2. Therefore, there was significant difference in sperm motility and acrosome reaction among individual bulls. 3. When KNC 1 and KNC 2 sperm were incubated in SCS and SCS + Ca, SCS + BSA, SCS + Ca + BSA, SCS + heparin, SCS + heparin + Ca, SCS + heparin + BSA, and SCS + heparin + Ca + BSA, there was significant difference in sperm motility among individual bulls, especially BSA in KNC 1 and BSA, Ca and Ca + BSA in KNC 2 showedsignificantly higher motility than the others. However, there was significant difference in sperm acrosome reaction among individual bulls, Ca in KNC 1 and Ca + BSA in KNC 2 showed higher acrosome reaction than the others.

• Steel and Composite Structures
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• 제18권4호
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• pp.1001-1021
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• 2015

Ultra-lightweight cement composite (ULCC) with a compressive strength of 60 MPa and density of $1,450kg/m^3$ has been developed and used in the steel-concrete-steel (SCS) sandwich structures. This paper investigates the structural performances of SCS sandwich composite beams with ULCC as filled material. Overlapped headed shear studs were used to provide shear and tensile bond between the face plate and the lightweight core. Three-dimensional nonlinear finite element (FE) model was developed for the ultimate strength analysis of such SCS sandwich composite beams. The accuracy of the FE analysis was established by comparing the predicted results with the quasi-static tests on the SCS sandwich beams. The FE model was also applied to the nonlinear analysis on curved SCS sandwich beam and shells and the SCS sandwich beams with J-hook connectors and different concrete core including ULCC, lightweight concrete (LWC) and normal weight concrete (NWC). Validations were also carried out to check the accuracy of the FE analysis on the SCS sandwich beams with J-hook connectors and curved SCS sandwich structure. Finally, recommended FE analysis procedures were given.