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.

Synthesis of Fluorescent Thiophene-derivatized Pentytiptycenes and Their Aggregate Behaviors

송진우,Song, Jinwoo The Basic Science Institute Chosun University 2010 조선자연과학논문집 Vol.3 No.1

Thiophene-derivatized pentiptycenes were synthesized and characterized by NMR and UV-Vis spectroscopy. Aggregation behavior of thiophene-derivatized pentiptycenes was monitored by the measurement of fluorescence. Fluorescence intensities for the thiophene-derivatized pentiptycenes and thiophene-derivatized pentiptycenes aggregates were compared. There is no shift in the maximum of the emission wavelength. In the range of water fraction between 20% and 40%, the emission intensity of thiophene-derivatized pentiptycene aggregates remains almost identical. Fluorescence efficiency incresaed by about 5 times higher when the thiophene-derivatized pentiptycenes forms the aggregates in solution.

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.

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

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.

국산화 GaN bare-die 및 패키지를 이용한 Low noise Amplifier 설계

송진우(Jinwoo Song),이태훈(Taehoon Lee),고현정(Hyunjeong Ko),이상훈(Sanghun Lee),전희석(heesauk Jhon) 대한전자공학회 2023 대한전자공학회 학술대회 Vol.2023 No.6

범프타입 가스포일베어링의 고온 동특성 규명

송진우(J. W. Song),김종백(J.B. Kim),이용복(Y. B. Lee),김태호(T. H. Kim) 한국트라이볼로지학회 2012 한국트라이볼로지학회 학술대회 Vol.2012 No.4

한 대학병원 내과계 중환자실의 기계환기 시행 환자의 현황 및 예후인자의 분석

송진우 ( Jin Woo Song ),최창민 ( Chang Min Choi ),홍상범 ( Sang Bum Hong ),오연목 ( Yeon Mok Oh ),심태선 ( Tae Sun Shim ),임채만 ( Chae Man Lim ),이상도 ( Sang Do Lee ),김우성 ( Woo Sung Kim ),김동순 ( Dong Soon Kim ),김원동 ( Won 대한결핵 및 호흡기학회 2008 Tuberculosis and Respiratory Diseases Vol.65 No.4

연구배경: 호흡부전은 중환자실 치료가 필요한 흔한 원인 중 하나로, 호흡보조치료의 발전에도 불구하고 높은 사망률을 보이고 있다. 호흡부전환자에 대한 기존의 국내 보고는, 특정질환만을 대상으로 하거나, 외과계 환자가 상당수 포함되어 있어, 내과계 호흡부전 환자들의 현황을 알기가 어렵다. 본 연구에서는 한 내과계 중환자실에서 기계환기치료를 시행 받은 성인환자들의 임상적 특성과 치료성적 및 예후와 관련된 인자를 알아보고자 하였다. 방법: 한 3차 병원 내과계 중환자실에서 48시간 이상 기계환기치료를 받은 479명의 성인환자를 대상으로 의무기록을 후향적으로 분석하였다. 결과: 대상환자의 평균연령은 60.3±15.6세였고, 34.0%가 여성이었다. 중환자실 입실시점의 APACHE III 점수의 평균값은 72.3±25점이었다. 호흡부전의 원인은 급성호흡부전(71.8%), 만성폐질환의 급성악화(20.9%), 혼수(5.6%), 신경근육계질환(1.7%)이었다. 초기 기계환기방식으로는 67.8%에서 압력조절환기법이 사용되었고, 초기 이탈방식으로는 압력보조환기법이 83.6%에서 사용되었다. 중환자실 사망률은 49.3%, 병원사망률은 55.4%였다. 주된 병원 내 사망원인은 패혈성 쇼크(32.5%), 호흡부전(11.7%), 다발성 장기부전(10.2%)이었다. 남성, APACHE III 점수가 70점 이상, 호흡부전의 원인이 간질성폐질환, 혼수, 흡인, 폐렴, 패혈증, 객혈인 경우, 총 기계환기시간 및 병원 재원일이 사망과 독립적으로 관련되었다. 결론: 호흡부전의 원인질환, 환자의 중증도, 성별에 따라 호흡부전환자의 예후에 차이가 있었다. Background: Respiratory failure is a common condition that requires intensive care, and has a high mortality rate despite the recent improvements in respiratory care. Previous reports of patients with respiratory failure focused on the specific disease or included a large proportion of surgical patients. This study evaluated the clinical characteristics, outcomes and prognostic factors of adult patients receiving mechanical ventilation in a medical intensive care unit. Methods: Retrospective chart review was performed on 479 adult patients, who received mechanical ventilation for more than 48 hours in the medical ICU of one tertiary referral hospital. Results: The mean age of the patients was 60.3±15.6 years and 34.0% were female. The initial mean APACHE III score was 72.3±25. The cause of MV included acute respiratory failure (71.8%), acute exacerbation of chronic pulmonary disease (20.9%), coma (5.6%), and neuromuscular disorders (1.7%). Pressure controlled ventilation was used as the initial ventilator mode in 67.8% of patients, and pressure support ventilation was used as the initial weaning mode in 83.6% of the patients. The overall mortality rate in the ICU and hospital was 49.3% and 55.4%, respectively. The main cause of death in hospital was septic shock (32.5%), respiratory failure (11.7%), and multiorgan failure (10.2%). Males, an APACHE III score>70, the cause of respiratory failure (interstitial lung disease, coma, aspiration, pneumonia, sepsis and hemoptysis), the total ventilation time, and length of stay in hospital were independently associated with mortality. Conclusion: The cause of respiratory failure, severity of the patients, and gender appears to be significantly associated with the outcome of mechanical ventilatory support in patients with respiratory failure. (Tuberc Respir Dis 2008;65:292-300)

계수 추정 기법을 이용한 동조자이로스코프 온도 제어기의 설계

송진우(Jinwoo Song),이장규(Jang Gyu Lee),강태삼(Taesam Kang),김진원(Jinwon Kim) 대한전기학회 1996 대한전기학회 학술대회 논문집 Vol.1996 No.7

위치 변화율 정보를 이용한 GPS 속도정보 시간 지연 보상 알고리즘

송진우(Jin Woo Song),김응주(Eung Ju Kim),김동진(Dong Jin Kim) 대한전기학회 2017 정보 및 제어 심포지엄 논문집 Vol.2017 No.10

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.