• 한국주거학회:학술대회논문집
• /
• 한국주거학회 2009년도 추계학술발표대회 논문집
• /
• pp.61-66
• /
• 2009

This study aims to propose alternatives to improve the residential environmental of National Rental Housing for Elderly. To proceed the study, we draw elements of plan for apartment housing for Elderly through literature review, explore actual conditions of residential environment on National Rental Housing for Elderly in Ha-dong, Kim-Jae, do IPA analysis using survey data, and finally, propose prior alternatives for the improvement of National Rental Housing for Elderly based on IPA analysis results. In the results, a lot of the planning elements of apartment housing for Elderly was applied for this site. But living conditions of residents need to be improved based on the result that importance (3.55) is higher than performance (3.18). this study is critical in drawing the direction of plan and improvement alternative by surveying actual residents, and will be used as the source for the National Rental Housing for Elderly project.

• ETRI Journal
• /
• 제36권2호
• /
• pp.188-196
• /
• 2014

This paper describes a simple delay diversity technique for terrestrial digital multimedia broadcasting (T-DMB) and digital audio broadcasting in a single-frequency network (SFN). For the diversity technique, a delay diversity scheme is adopted. In the delay diversity scheme, a non-delayed signal is transmitted in the first antenna, and delayed versions of the signal are transmitted in each additional antenna. For an SFN environment with multiple transmitters, delay diversity can be executed by controlling the emission times of the transmitters. This SFN delay diversity scheme does not require any hardware changes in either the transmitter or receiver, and perfect backward compatibility can be acquired. To evaluate the performance improvement, laboratory tests are executed with various types of commercial T-DMB receivers as well as a measurement receiver. The improvement in the bit error rate performance is evaluated using a measurement receiver, and an improvement of the threshold of visibility value is evaluated for commercial receivers. Test results show that the T-DMB system can obtain diversity gain using the described technique.

• 품질경영학회지
• /
• 제31권3호
• /
• pp.37-61
• /
• 2003

The purpose of this study is to identify (1) the successful quality management activities of domestic enterprises contribute to enhancing both corporate and national competitiveness and that the corporate and national competitiveness are related each other; (2) and to have the government and the citizens as well as enterprises re-recognize the importance of quality management and encourage them to make aggressive investments on quality management. It was found in this study that the enterprises with quality management scheme showed better performance that those without quality management activities. It was also found that quality competitiveness is a key factor for the enhancement of the national competitiveness, and that although quality improvement is normally realized through efforts of private enterprises (a conventional paradigm), active government support and participation are absolutely necessary for the competitiveness of the nation and industries. Accordingly, the quality management should be recognized not only as part of business improvement activities, but as nationwide activities where public sectors including government enterprises, hospitals, schools, regional governments, media companies and citizens groups are involved. In order to build a high-quality nation in the 21st century, the quality improvement should be realized through concerted efforts of the people, enterprises and the government.

• 한국항행학회논문지
• /
• 제12권2호
• /
• pp.115-121
• /
• 2008

본 논문에서는 DS-CDMA 시스템 구현 시 복잡성을 감소시키는 다중접속간섭 등의 여러 감쇠 요인을 고려하여 이를 개선시킬 수 있는 FS MC-CDMA 시스템의 성능을 분석하고 열악한 무선 모바일 환경에서 성능 개선기법인 BCH 부호화기법을 채용하여 FS MC-CDMA 시스템의 성능을 개선하였다. 또한 차세대 무선 모바일 통신 채널 환경으로는 나카가미 페이딩을 적용하여 FS MC-CDMA 시스템의 성능을 분석하여 검토하였다.

• 한국항만경제학회지
• /
• 제22권4호
• /
• pp.39-58
• /
• 2006

정보공유와 신뢰, 피드백을 바탕으로 한 파트너십 시스템은 각 협력사간 반품물류관리에 있어 보다 효율적인 성과를 얻을 수 있게 한다. 이 사례연구는 홈쇼핑업체와 각 협력사간 웹 기반의 파트너십 시스템을 통한 반품물류관리 개선 성과를 보여주고 있다. 첫째, 협력사간 거래비용과 작업시간을 감소시키고 있으며, 둘째, 생산라인의 집중화 및 계획 관리가 가능토록 하였다. 마지막으로 신속하고 정확한 반품관련 업무처리가 가능해지고 피드백을 통해 제품의 품질 향상을 도모할 수 있음을 보여주고 있다.

• KIEAE Journal
• /
• 제13권4호
• /
• pp.27-32
• /
• 2013

This study focus on shaft box facade, special form of box window construction. It consists of a system of box window with continuous vertical shafts that extend over a number of stories to create a stack effect. The subject building was decided by analyzing various types of exiting apartments. Shaft box type balcony was devised by setting up shaft space at a part of balcony. Air flow and indoor air temperature were simulated, performance of shaft box type balcony was compared with existing types using VE computer simulation program. Research consequence can be summarized as follow: 1) In the case of existing types, the change of window opening rate has only a little effect on the improvement of indoor temperature. But, air flow rate increased two times in the case that changed opening rate 20% to 40% 2) In the case of existing types, the growth of air flow rate has little effect on the improvement of indoor temperature. But, shaft box type represented the remarkable effect on the improvement of indoor temperature as well as the growth of air flow rate.

• 한국철도학회:학술대회논문집
• /
• 한국철도학회 2010년도 춘계학술대회 논문집
• /
• pp.1300-1309
• /
• 2010

In the railway bridges, steel plate girder types are preferred due the high stability. Nevertheless, it has been pointed out that this type of bridge has problems such as, structural damages in the rail and girder seat, noise problem due to impact at the rail joint and excessive vibration. This vibration and/or deflection are mainly because insufficient stiffness of steel plate type of bridge. To resolve these problems, PC-Slab composite plate girder type which has simple process and economic cost, is proposed in this study. The static and dynamic experiment is performed by using the production of actual sized PC-Slab and abandoned steel plate girder. The object of this experiment is to verify the fact that girder stiffness increase and structural safety. The result of the experiment is used to analyze the effect of performance improvement of PC composite plate girder type. Using this method, economic rail maintainers, girder stiffness increase, and also speed/ride improvement even for existing rail could be expected by dynamic performance improvement. Additionally noise due to impact, deflection and vibration caused from long rails can be reduced.

• 소음진동
• /
• 제9권3호
• /
• pp.477-484
• /
• 1999

This study aims to present proper thickness of resilient mount and pattern of chips for the improvement of impact sound isolation. To achieve this aim, field tests were performed to evaluate the performance of impact sound isolation of pilot samples using waste tire chips against light and heavy-weight impacter, which samples were installed over concrete slabs of an apartment housing. In this study, the experiments were performed by the impact sound level of floors in KS F 2810 "Method for field measurement of floor impact level". As results, a flooring structure using waste tire chips as a resilient mount, with no relation to chip's types, has enhanced performance by 1~2 degree in light impact sound isolation, while it has improvement in heavy impact sound isolation. And fiber-type chips have better performance than granule-type ones when they overlaid concrete slab with 15~20 mm of thickness. For the improvement of impact sound isolation, it is recommended that insulating materials should be applied at joints between floating floors and walls, or floating floors and a doorframes, and also waterproof papers should be used for the effective thickness of resilient mount.ent mount.

• 한국방송∙미디어공학회:학술대회논문집
• /
• 한국방송공학회 2009년도 IWAIT
• /
• pp.618-622
• /
• 2009

An improvement of standard encoder has been saturated recently. However, new coding method does not have a compatibility with conventional standard. To solve this problem, new concept coding method that has a semicompatibility with standard may be discussed. On the other hand, cyclic Intra-picture coding is used for access and refreshment. However, I-picture spend large amount of bits. An enhancement of I-picture is desired with keeping its refreshment performance. Further, it's a problem that quality change at the border of GOP because of its independency. To respond these, we propose the coding which is applied an inter-frame processing at the border of GOP. Applied method is the reduction of quantization error using the motion compensated inter-picture processing. In this report, we check the improvement of the efficiency and the compatibility of proposed method. As a result of examination, we recognize that the total gain is maximally 1.2dB in PSNR. Generally, the degradation of performance in standard decoding is smaller than its gain. Also the refreshment performance is tested.

• 한국주거학회논문집
• /
• 제26권3호
• /
• pp.1-9
• /
• 2015

This study aims to estimate the perception of mothers of infant and toddler on the child-rearing environment and compare the recognition of parents who live in APT and multi-family housing. This study investigates the mothers in order to survey the level of importance and satisfaction on the neighborhood environment factors for child-rearing. The result of questionnaire is analyzed by Importance-Performance Analysis (IPA). According to the result of IPA by housing types, it was found that the improvement of pedestrian environment, separation of pedestrian and vehicle, natural environment and playground is required particularly in the multi-family housing area. the mothers need soundproofing of house and management of unwanted facilities in neighborhood in common. In the apartment, improvement of child-care facilities and children's library is required. The results of IPA on the mothers of infant and toddler may be important foundation for future strategies for child-rearing environment improvement.