동물성 첨가제가 모르타르 및 콘크리트의 기초 물성에 미치는 영향

송진우,문승권,Song, Jin-Woo,Moon, Seung-Kwon 한국건설순환자원학회 2012 한국건설순환자원학회지 Vol.7 No.1

본 연구는 모르타르와 콘크리트에 첨가제로서, 돈혈을 혼합하였을 때 물성에 미치는 영향을 알아보기 위해 실험을 실시하였다. 모르타르 실험에는 단위질량, 플로우, 압축강도 실험을 실시하였고, 콘크리트 실험에는 공기량, 슬럼프, 블리딩, 응결시간, 압축강도, 동결융해저항성 실험을 실시하였다. 실험 결과로서, 돈혈을 모르타르와 콘크리트에 첨가하면 공기연행효과를 가지는 것으로 나타났다. 모르타르 실험에서는 플로우 값은 증가하며, 단위중량은 감소하고, 압축강도는 공기연행에 의해 감소하였다. 콘크리트 실험에서는 돈혈을 첨가하였을 때 공기연행효과로 공기량은 증가하나, 시간이 경과함에 따라 공기량이 감소하는 경향이 있으며, 응결시간이 지연되고, 블리딩량은 감소하는 경향을 보이는 것으로 나타났다. 콘크리트의 압축강도는 공기연행작용으로 인하여 강도가 감소하며, 동결융해 저항성은 향상되는 효과가 있는 것으로 나타났다. The study was conducted to determine the effects of adding pig blood as an admixture to both mortar and concrete. The mortar tests included the determination of its unit weight, flow and its compressive strength. Moreover, the concrete test includes the determination of air content, slump, bleeding, setting time compressive strength and freeze-thaw resistance of the material. As the test result, the utilization of pig blood, as an additive to both mortar and concrete mixtures causes air entrainment. The mortar flow increased and both the unit weight and the compressive strength of mortar decreased. As the blood replacement rate increases, the air content decreases over time, the setting and amount of bleeding showed a tendency to decline and reduced compressive strength, and the freeze-thaw resistance of the concrete increased.

WLAN 기반 실내 위치 측위에서 측위 정확도 향상을 위한 데이터 구축 방법

송진우,허수정,박용완,유국열,Song, Jin-Woo,Hur, Soo-Jung,Park, Yong-Wan,Yoo, Kook-Yeol 대한임베디드공학회 2012 대한임베디드공학회논문지 Vol.7 No.2

In this paper, we proposed Wireless LAN (WLAN) localization method that enhances database construction based on weighting factor and analyse the characteristic of the WLAN received signals. The weighting factor plays a key role as it determines the importance of Received Signal Strength Indication (RSSI) value from number of received signals (frequency). The fingerprint method is the most widely used method in WLAN-based positioning methods because it has high location accuracy compare to other indoor positioning methods. The fingerprint method has different location accuracies which depend on training phase and positioning phase. In training phase, intensity of RSSI is measured under the various. Conventional systems adapt average of RSSI samples in a database construction, which is not quite accurate due to variety of RSSI samples. In this paper, we analyse WLAN RSSI characteristic from anechoic chamber test, and analyze the causes of various distributions of RSSI and its influence on location accuracy in indoor environments. In addition, we proposed enhanced weighting factor algorithm for accurate database construction and compare location accuracy of proposed algorithm with conventional algorithm by computer simulations and tests.

비스포스포네이트 관련 악골괴사환자의 혈청 C-terminal cross linking telopeptide 수치에 따른 위험도 평가와 질환의 심도 및 조기 수술 후 치유 사이의 상관관계

송진우(Jin-Woo Song),김기현(Ki-Hyun Kim),송재민(Jae-Min Song),전병도(Byung-Do Chun),김용덕(Yong-Deok Kim),김욱규(Uk-Kyu Kim),신상훈(Sang-Hun Shin) 대한구강악안면외과학회 2011 대한구강악안면외과학회지 Vol.37 No.1

Introduction: The utility of the C-terminal cross-linking telopeptide test (CTX) as a method for staging Bisphosphonate-related osteonecrosis of the jaws (BRONJ) and its healing process was examined. Materials and Methods: A total 19 patients who were diagnosed with BRONJ underwent a fasted morning CTX test, were enrolled in this study. The serum CTX values ranged from 50 to 630 pg/mL (mean 60). The risk assessment was rated according to the CTX values of the individual patient (minimal risk, ≥150 pg/mL, moderate, 100 to 150 pg/mL, high, ≤100 pg/mL). The BRONJ scores were then calculated according to the number of BRONJ lesions and their stage. The operation was done as soon as possible, regardless of BORNJ stage. Results: The mean duration of bisphosphonate therapy was 4.1 years. Of the 19 patients, 15, 2 ans 2 received alendronate, risedronate and zoledronate, respecively. Of the 19 patients who underwent a sequestrectomy, saucerization and smoothing, 15 healed after the initial surgery, 1 patient healed after one more surgical procedure, 3 patients did not heal completely but showed improvement in symptoms. Therefore, 17 out of the 19 patients healed completely with complete mucosal coverage and the elimination of pain. The risk assessment using the CTX value and disease severity were not correlated (r=-0.264, P=0.275). In addition, the risk assessment using CTX value and healing after surgery were not correlated (r=-0.147, P=0.547). Conclusion: The serum CTX should be considered carefully by clinicians as part of overall management. Early surgical intervention is of benefit in the treatment of stage II BRONJ.

CFRP 부품의 변형 시 파손 특성에 관한 해석적 연구

송진우(Jin Woo Song),김영주(Young-Ju Kim),김흥규(Heung-Kyu Kim) 한국자동차공학회 2017 한국자동차공학회 부문종합 학술대회 Vol.2017 No.5

조합 경매에서의 최적 분배를 위한 빠른 알고리즘

송진우(Jin-Woo Song),양성봉(Sung-Bong Yang) 한국정보과학회 2003 정보과학회논문지 : 시스템 및 이론 Vol.30 No.9·10

In combinatorial auctions buyers may bid for arbitrary combinations of goods. But determining the winners of combinatorial auctions who maximize the profit of a seller is known to be NP-complete. A branch-and-bound method can be one of practical algorithm for winner determination. However, bid selection heuristics play a very important role in the efficiency of a branch-and-bound method. In this paper, we designed and implemented an algorithm which used a branch-and-bound method and Linear Programming for winner determination in combinatorial auctions. We propose new bid selection heuristics which consider a branching bid and conflicting bids simultaneously to select a branching bid in the algorithm. In addition, upper bounds are reused to reduce the running time in specific cases. We evaluated the performance of the algorithm by experiments with five data distributions and compared our method with others. The algorithm using heuristics showed a superior efficiency in two data distributions and a similar efficiency in three distributions. 조합 경매에서는 구매자들이 원하는 상품들을 조합해서 입찰할 수 있다. 그러나 판매자의 이익을 최대로 하는 구매자들, 즉 조합 경매의 승자를 결정하는 문제는 NP-complete이다. 적절한 시간 내에 승자를 찾기 위해서 분기 한정법(branch-and-bound)을 사용할 때, 구매자들의 비드(bid)들 중에서 어떤 비드를 선택해서 분기할 것인가를 결정해야 한다. 이 때, 비드를 선택하는 휴리스틱이 분기 한정법의 성능을 결정하는 중요한 역할을 한다. 본 논문에서는 조합경매의 승자를 결정하기 위해서 분기 한정법과 Linear Programming(LP)를 사용하는 알고리즘을 설계하고, 분기할 비드를 선택하기 위하여 분기할 비드와 충돌하는 비드들을 동시에 고려하는 비드 선택 휴리스틱을 제안한다. 그리고 최대 한계치를 재사용하는 경우를 찾아내서 알고리즘의 수행 시간을 줄였다. 알고리즘의 수행 성능을 평가하기 위해서 다섯 가지의 데이타 분포에 대한 실험 결과를 이전 논문들과 비교했다. 제시한 휴리스틱을 사용한 알고리즘은 두 가지 데이타 분포에서는 더 빠른 성능을 보였고 나머지 세 분포에서는 비슷한 성능을 보였다.

결체조직 질환과 간질성 폐질환

송진우 ( Jin Woo Song ) 대한류마티스학회 2014 대한류마티스학회지 Vol.21 No.6

Connective tissue disease, Interstitial lung disease, Systemic sclerosis, Lung dominant connective tissue disease Interstitial lung disease (ILD) is one of the most serious pulmonary complications of connective tissue diseases (CTDs), resulting in significant morbidity and mortality. ILD is frequently seen in CTDs, particularly systemic sclerosis, polymyositis/dermatomyositis, and rheumatoid arthritis; however, determining that ILD is associated with an established CTD requires the exclusion of alternative causes. Non-specific interstitial pneumonia is the most commonly observed histopathological pattern in CTD-associated ILD (CTD-ILD) except for rheumatoid arthritis, characterized by a higher frequency of usual interstitial pneumonia. Although CTD-ILD usually shows a stable or slowly progressive course, a subgroup exhibits a more severe and progressive course and requires pharmacologic intervention. Treatment strategies typically involve empirical use of immunosuppressive therapies, although a large, randomized study has examined the impact of immunosuppressive therapy for systemic sclerosis associated ILD and should a so address comorbid conditions considering implementation of adjunctive therapeutic strategies. A subgroup of patients with idiopathic interstitial pneumonia who meet some, but not all, diagnostic criteria for CTDs were identified and well organized prospective studies are needed in to better determine whether evidence of autoimmunity in those plays a part in the evolution to well-defined CTDs or carries prognostic significance.

사료 내 해조류(톳, 감태) 첨가가 돌돔(Oplegnathus fasciatus) 치어의 비특이적 면역반응에 미치는 영향

송진우 ( Jin Woo Song ),장지웅 ( Ji Woong Jang ),김성삼 ( Sung Sam Kim ),오대한 ( Dae Han Oh ),차지훈 ( Ji Hoon Cha ),이경준 ( Kyeong Jun Lee ) 한국수산과학회(구 한국수산학회) 2011 한국수산과학회지 Vol.44 No.4

Two feeding trials were conducted to determine the effects of dietary supplementation with Hizikia fusiformis or Ecklonia cava on the non-specific immune responses of parrot fish Oplegnathus fasciatus. Fish were fed experimental diets to which H. fusiformis or E. cava powder were added to final concentrations of 0, 2, 4 and 6%, respectively. After feeding for two weeks, phagocytic activity was significantly higher in fish fed diets containing H. fusiformis, but not E. cava, than in fish fed the basal diet. Lysozyme activity was significantly increased in the fish fed diets containing 6% H. fusiformis and E. cava. Myeloperoxidase activity was also significantly higher in fish fed diets containing 2 and 4% H. fusiformis, as compared to the basal diet, but not in those fish fed E. cava. These two studies indicate that dietary supplementation with H. fusiformis or E. cava could enhance the innate immune responses of parrot fish during their growth stage.

MEMS 관성센서를 이용한 3차원 스마트 입력장치 설계

송진우(Jin Woo Song),장현기(Hyun-Kee Chang),이정환(Jung Hwan Lee),안시홍(Sihong Ahn),정학영(Hakyoung Chung) 한국정보기술학회 2004 한국정보기술학회지 Vol.2 No.-

측정치 잔여 기반의 적응 상보필터를 이용한 호버링로봇용 자세측정 알고리즘

송진우(Jin Woo Song),이동근(Dong Guen Lee) 호서대학교 공업기술연구소 2016 공업기술연구 논문집 Vol.35 No.1

본 논문에서는 자세 변화가 매우 심하고 다양한 동적 환경에 노출되는 호버링로봇을 위한 자세측정 알고리즘을 제안한다. 최근 호버링로봇의 응용범위가 확대되면서 다양한 동적 환경에 노출되거나 고기동을 요하는 경우가 늘어 나고 있으며,이 경우 기존의 상보필터로는 정확한 자세측정이 매우 어렵기 때문에 일반적으로 칼만필터를 이용한 복합항법 알고리즘을 구현하게 된다. 그러나 칼만필터는 비교적 고성능의 프로세서를 필요로 하는 단점이 있다. 이러한 단점을 극복하기 위해 본 논문에서는 중력과 가속도를 비교하여 필터 계수를 변화시키는 일반적인 적응 필터링 기법에 자세 예측 결과와 측정치 잔여(m ea su rem e n t re s id u a l)항을 비교하여 필터 계수를 정밀하게 변화시 키는 추측 알고리즘을 추가한 새로운 적응 상보필터를 제안하여 자세측정 성능을 개선하였다. 제안된 알고리즘은 도로 주행 실험을 통하여 검증하였다. 실험 결과로부터 제안한 필터가 기존의 적응 기법을 이용한 상보필터에 비해 상대적으로 우수한 자세 추정 성능을 보이는 것을 확인하였다. In this paper, a novel attitude detection algoritnm using advanced adaptive complementary filter is proposed. The proposed algorithm uses not only basic structure of complementary filter but also measurement residual for advanced adaptation rule. If the measurement residuals, which are the differences between the measurement and the estimated state, have unusually large values, the proposed filter Since the adaptation rule is determined according to measurement residual as well as the norm of acceleration, the abnormal measurements, which are induces by the dynamic acceleration or centrifugal acceleration, can have less weighting, which contributes to the performance improvement under dynamic acceleration conditions such as coordinate turn. The effectiveness of the proposed algorithm is verified via experiments, which show the overall performances are superior to those of conventional adaptive complementary filter algorithm.

마인드 맵을 이용한 이야기나누기가 지체장애학생의 쓰기능력에 미치는 효과

송진우 ( Jin Woo Song ),이효근 ( Hyo Keun Lee ),이미경 ( Mi Kyung Lee ) 한국특수아동학회 2013 특수아동교육연구 Vol.15 No.2

이 연구에서는 전라남도 장애인종합복지관에서 조기교육 서비스에 참가하고 있는 지체장애학생 3명을 대상으로 마인드 맵을 이용한 이야기나누기가 이들의 쓰기능력에 어떠한 효과를 가져 오는 가를 알아보았다. 연구 결과, 첫째, 마인드 맵 활동을 이용한 이야기 나누기는 지체장애 학생의 쓰기에 있어 단문과 복문의 수가 증가하여 문장구성에 긍정적인 영향을 주었다.둘째,마인드 맵을 이용한 이야기나누기는 대상자의 문장길이의 증진에도 긍정적인 효과를 가져왔다. 이상의 결과들을 통해 마인드 맵을 이용한 이야기 나누기를 하는 동안 주제 개념 정리 및 경험, 생각, 느낌 나누기 등의 언어적 상호작용은 뇌성마비 학생의 쓰기 능력에서 긍정적인 효과를 가져왔다는 것을 알 수 있었다. 따라서 국어교과 지도 시 마인드맵을 이용한 쓰기지도를 지속적으로 실시한다면 지체장애 학생의 쓰기능력에서 많은 향상을 가져올 것이라 기대된다. This study explored the effects of story sharing by using the mind map on writing ability of students with physical disabilities. For this purpose, this study applied the multiple baseline targeting for 3 middle school students with physical disabilities who attend the early education program of a community welfare center for disabled people in Jeollanam-do. The results of study were as follows. First, sharing stories by using the mind map had a positive effect on the construction of sentences in writing of physically challenged students. As the numbers of simple sentences and complex sentences of participants in the writing were increased, the scores of construction of sentences were increased. Second, the story sharing by using the mind map had a positive effect on the length of sentences of students with physical disabilities. We could expect that summary of themes, sharing experiences and feeling through language interaction during activities of mind map brought positive effects on writing abilities for students with middle school students with physical disabilities. If the writing instruction by using mind map during language arts class was taught consistently, it would bring much improvement on writing skills for students with physical disabilities.