전기저항식 로드셀을 이용한 균등긴장시스템 개발 및 성능실험

박원태(Park Weon-Tae),천경식(Chun, Kyoung-Sik) 한국산학기술학회 2016 한국산학기술학회논문지 Vol.17 No.2

MS(Multi-Strand) 케이블은 여러 개의 강연선으로 이루어져있어, 케이블 시공시 각 강연선을 차례대로 개별적으로 긴장한다. 그리고 마지막 강연선이 정착되었을 때, 모든 강연선에 동일한 장력이 도입되어야하며, 이것이 MS 균등긴장의 핵심기술이다. 본 연구에서는 엑스트라도즈(Extradosed)교 및 사장교의 사재케이블(Stay Cable)에 적용되는 2,200MPa 초고강 도 강연선들을 균등하게 긴장, 제어할 수 있는 MS 케이블 균등긴장시스템을 개발하였다. 개발한 균등긴장시스템은 전기저항 식 로드셀, 유압잭, 유압펌프 그리고 통합제어기로 구성되며, Master 강연선과 Slave 강연선의 장력변화를 실시간으로 예측하 며 제어하는 알고리즘을 탑재하였다. 개발시스템의 기능과 성능을 검증하기 위해 균등긴장 실험을 수행한 후, 광양 태인2교 (ED교)의 사재케이블 가설긴장에 성공적으로 적용하였다. Because MS(Multi-Strand) cables consist of many strands, a jacking force is applied to each strand one by one for cable construction. All strands should have an equal tensile force when the last one is wedged. This is the core technology for MS iso-tensioning. In this study, a new MS cable iso-tensioning system was developed for controlling and jacking the high-strength strands, with an ultimate tensile strength of 2,200MPa, for a stay cable of extra-dosed/cable-stayed bridges. The newly developed iso-tensioning system consists of electrical resistance load cells, hydraulic jacking devices, hydraulic pumps, and integrated controllers. Moreover, it is embedded with an algorithm that can control and predict the variations in tensile forces of the Master and Slave strands in real time. Actual experiments were carried out to verify the function and performance of the newly developed system. This system was applied successfully to the stay cable construction of 2nd Tae-in extra-dosed bridge in Gwangyang.

갑상선기능항진증과 원발성항인지질항체증후군에 동반된 무도병 환자 1례

박종원,김동현,박태환,권오상 대한신경과학회 1998 대한신경과학회지 Vol.16 No.2

비호지킨 림프종의 임상적 고찰

김태원,조은택,조기섭,정재용,허재봉,장영,박유환,정춘해 조선대학교 1995 The Medical Journal of Chosun University Vol.20 No.1

A retrospective clinical and histologic study of 30 non-Hodgkin's lymphomas diagnosed at the Department of Hemato-oncology of the Chosun University from January 1989 to December 1993 is presented. Among total 30 cases whose sexes were mentioned, male were 18 and female were 12 and the ratio is 1.5:1. The peak incidence of non-Hodgkin's lymphoma was found in the third decade. The case distributions by Working formulation were summarized in table 3. The most common histopathologic type of non-Hodgkin's lymphoma was the diffuse large cell type of intermediate grade. The presenting symptoms at the time of first visit to the hospital were summarized in table 4. The most common symptoms were palpable mass. Lymph node enlargements were found in 87 %, and most frequently on cervical area(35%). The incidence of primary nodal lymphoma is more frequent than extranodal lymphoma, 1.2:1. The most common primary site of extranodal lymphoma is the gastrointestinal tract. In the laboratory findings, the data of hemoglobin and hematocrit were summarized in table 8, 9, Values of hemoglobin and hematocrit of female patients greater than those of male patients. The results of the immunophenotypings of nodal and extranodal lymphoma indicates that the B-cell lymphoma are predominant(B:T=1.4:1). The clinical stage was Ⅱ in 9 cases(30%) Ⅲ in 9 cases(30%), Ⅳ in 8 cases(26.7%), Ⅰin 4 cases(13.3%), 28 cases were treated with CHOP regimen. Among them, 17 cases(60.8%) achieved a complete remission. 5 cases had a partial response. The most frequent toxicities were toxic hepatitis.

진행 위암환자에서 Lymphokine-Activated Killer (LAK) 활성의 저하

홍원선,김영환,송재관,강윤구,이진오,강태웅,김정룡 대한내과학회 1990 대한내과학회지 Vol.38 No.3

Natural killer(NK) and lymphokine-activated killer(LAK) activities were determined in 31 patients with unresectable stomach cancer before and immediately after chemotherapy with 5-fluorouracil, adriamycin and mitomycin C(FAM) and 31 healthy volunteers. The major purposes of the study were focused on whether peripheral blood lymphocytes(PBL) in stomach cancer patients had a similar ability in the generation of LAK activity to those in healthy volunteers and what the effect was of chemotherapy with FAM on the generation of LAK activity. LAK cells were generated in vitro by culturing human PBL with 100 U/㎖ of recombinant human interleukin-2(rH-IL-2) for 72 hours. K562(human myelogenous leukemia cell line) and MKN-45(human stomach adenocarcinoma cell line) were used as target cells for NK and LAK activities. NK activity against K562, a sensitive line, was significantly depressed in patients with stomach cancer compared with that in healthy volunteers(p<0.01). However, LAK activity against K562 was similar to that of the controls. Age, sex and performance status(ECOG 0-2 and 3-4) did not have an influence on both NK and LAK activities. LAK activity was significantly higher than NK activity, either against K562 or MKN-45, in both healthy volunteers and patients with stomach cancer(p<0.001). NK and LAK activities against MKN-45, a NK-resistant line, in patients with stomach cancer showed significantly lower levels than those in healthy volunteers. We also analyzed the effect of chemotherapy with FAM on NK and LAK activities, with no suppression of NK and LAK activities being observed. In this study, we have demonstrated that PBL of stomach cancer have a reduced ability to generate LAK activity in response to rH-IL-2. However, LAK activity generated from PBL receiving chemotherapy with FAM was similar to that of PBL without chemotherapy.

Laves상 ZrV_2계 수소저장합금 전극의 Ni 치환에 따른 열역학적 안정성에 관한 연구

조태환,최원경 단국대학교 2000 論文集 Vol.35 No.-

Thermodynamic properties of laves phase ZrV_2 were studied in terms of the equilibrium hydrogen pressure. ZrV_2 alloy with high equilibrium hydrogen pressures at room temperature, which is usually difficult to charge, was substituted with Ni partialy. Partial substitution of Ni made not only the equilibrium pressure to be reduced remarkably, but also the enthalpy change depending on the formation of metal hydride to be agreed to the value in gas phase reaction and electrochemical reaction.

비복근건 부분절단술을 통한 종아리성형술

박원진,이태희,신명수 大韓成形外科學會 1999 Archives of Plastic Surgery Vol.26 No.3

A muscular calf is esthetically unappealing in Asian women. Treatment by liposuction alone has poroven to be difficult due to a small amount of fat. We established a new method of transecting half of the gastrocnemius tendon in order to improve the contour of the calf. Thirty-five patients were operated on during the past 3 years. The medial or lateral half of the gastrocnemius tendon was cut using an endoscopic-guided 3M AGEE blade through a 1cm-sized incision. The portion of the muscle above the site of the transection was elevated from the underlying soleus muscles. We checked the calf circumference and evaluated the clinical results at 6 months postoperatively. An average 10% reduction in calf circumfernce was measured, showing a significant esthetic improvement. There were no significant changes in gait analysis or in the Cybex test. There were no specific complications related to the procedure. Through our clinical experience in 35 cases, we were able to prove that tenotomy is a effective, simple and easy method without severe morbidity.

生理活性物質의 生産 : Ⅰ. 枸杞子로부터 callus 및 multiple shoot의 誘起

김대현,김병원 東國專門大學 1994 金龜論叢 Vol.2 No.1

본 硏究에서는 藥用植物인 구기자의 大量增殖을 통한 藥用成分의 大量生産 및 藥理效果의 臨床的 適用 可能性을 조사하고자 구기자葉으로부터 shoot를 大量增殖 시킬 수 있는 方法과 캘러스를 誘導하는 方法을 調査하고자 하였다. 구기자葉으로부터 캘러스의 誘導는 0.001㎛의 BA와 5㎛의 2,4-D 濃度에서 가장 좋았다. 대량증식을 위하여 구기자葉으로부터 multiple shoot를 誘起시킨 결과, 2㎛의 BA와 0.2㎛의 NAA, 4%의 sucrose, pH 5.6, 그리고 0.2% casein hydrolysate를 첨가시 葉조직 切片당 약 40.6개의 shoot가 誘起되었다. 그리고 배양 6주후 대량증식된 2cm 크기의 shoot는 截取하여 MS배지 농도를 1/4-8/4로 稀釋한 培地에 移植한 결과, 줄기의 伸長은 6/4MS 그리고 뿌리의 발근율은 7/4MS에서 가장 양호하였으며, 재분화된 소식물체들은 5주간의 순화과정을 거쳐 일반토양에 活着시킬 수 있었다.

IC 실현에 적합한 정현파 능동 발진기의 회로 및 특성에 관한 연구(Ⅱ)

이원건,손태호,박종연 江原大學校 産業技術硏究所 1991 産業技術硏究 Vol.11 No.-

Two kinds of simple active oscillators are proposed and analyzed assuming that operational amplifier has two-poles frequency characteristics. The first circuit is composed of one operational amplifier, one resistor and one grounded capacitor. The second oscillator is realized with one operational amplifier and three resitors. Proposed oscillators have the low sensitivity of the oscillation frequency for little variations of the passive element values. By the experimental results obtained with Op-Amp.?A741, the simple oscillators can be useful for the frequency range 1.25 KHz≤f? ≤400KHz for the active -R ocillator, and it is shown to transform the active-R oscillator circuit into the voltage controlled type.Therefore, two kinds of oscillators circuit are attractive for the IC realization, because they hve one operational amplifier, one resistor and one grounded capacitor, or three resistors.

벼 밭재배에 따른 수량 및 미질

최원영,최민규,김상수,이규성,김태수,이재길 한국국제농업개발학회 2003 韓國國際農業開發學會誌 Vol.15 No.4

벼 밭재배시 논벼 품종들의 적응성을 검토하기 위하여 마늘 간작으로 벼를 건답점파하여 재배한 결과를 요약하면 다음과 같다. 1. 입모율은 밭벼에 비해 논벼 품종이 낮았는데 그 순서는 상남밭벼〉동진찰벼〉신선찰벼〉진부찰벼 순이었다. 2. 출수기는 상남밭벼에 비해 진부찰벼는 3일 빨랐고 신선찰벼는 9일, 동진찰벼는 12일이 늦었다. 3. ㎡당 수수와 등숙비율은 밭벼에 비해 논벼품종들이 높았다. 4. 쌀수량은 상남밭벼에 비해 신선찰벼는 12%가 많았고 동진찰벼는 같았으며, 진부찰벼는 18%가 적었다. 5. 완전립비율은 진부찰벼에서 높았고 그 외는 비슷하였으며, 식미지수는 상남밭벼에 비해 동진찰벼는 높았으나 진주찰벼와 신선찰벼는 낮았다. To identify the rice varieties adaptable for upland cultivation, a series of experiments was carried out at the field(Chonnam series) of the Muan. Cheonnam province during 1999 - 2001. Four varieties, Jinbuchalbyeo(early-maturing variety), Sinseonchalbyeo (medium-maturing variety), Dongjinchalbyeo(medium-late maturing variety), and Sangnambatbyeo as a standard variety for upland were used in this experiment. Seedling establishment of the varieties was the highest in Sangnambatbyeo and followed by Dongjinchalbyeo under upland condition. Heading date in general delayed ranges from 9 to 12 days, while early-maturing variety, Jinbuchalbyeo was faster for 3 days compared with Sangnambatbyeo. Number of panicle per square meter was similar in both lowland and upland rice but percentage of ripened grain was high in lowland rice. Milled rice yield was high as of 12% in Sinseonchalbyeo compared with Sangnambatbyeo. Head rice ratio showed also the highest in Sinseonchalbyeo. The results indicate that Sinseonchalbyeo as glutinous rice variety could adapt well in this upland condition, and have good milling recovery as head rice as well as yield advantage.

통일비용 조달방안 및 통일정책에 관한 연구

장원태 경복대학 1998 京福論叢 Vol.2 No.-

통일비용 조달방안은 크게 국내에서 조달하는 방안과 해외에서 조달하는 방안으로 나눠볼 수 있다. 남한에서의 자금 조달 방안으로서는 ▲증세 ▲행정·재정개혁을 통한 재정기반 강화 ▲채권발행 ▲민간자금 동원 ▲국유재산불하 ▲군비 감축 등이 있다. 해외자금의 조달 방법에는 직접투자 유치, 증권투자, 차관도입, 일본의 배상금, 국제적 북한 지원기금, 프로젝트 파이낸싱(Project financing)등이 있다. 한편 정부는 다음과 같은 노력이 필요하다. 첫째, 정부가 비용이 가장 적게 드는 방식으로 통일을 추진해야 한다. 둘째, 통일정책은 통일비용에 대한 지불능력을 향상시켜 나가는 방향으로 추진되어야 한다. 셋째, 통일의 당위성과 통일에 따르는 편익을 국민에게 제대로 인식시키도록 노력해야 한다. 넷째, 국민들로 하여금 통일의 가능성에 대해 확신을 갖도록 해야한다. 다섯째, 국민들이 자발적으로 호응할 수 있는 통일재원조달 방안을 마련해야 한다. 여섯째, 국내산업의 경쟁력을 강화해야 한다. 일곱째, 통일 자발적으로 호응할 수 있는 통일재원조달 방안을 마련해야 한다. Having to raise more the cost of reunification than the people are willing to pay, the government can face tax resistance. Therfore, we must think other methods. Their methods are an increase in government debt through bond issues, participating private capital, enforcing fiscal foundation though government reform, reducing military force, inducing foreign capital, and using project financing Meanwhile, It can take the following preemptive measures. 1. Follow plans to minimize cost of reunification and minimize negative sentiments arising from the cost 2. Help the North help itself by increasing South's economic aid to the North. 3. Instill positive attitude in South Korean tax payers about the benefits of reunification. 4. Instill confidence in realization of reunification. 5. Prepare polities to secure funds through voluntary cooperation. 6. Strengthen domestic economy. 7. Maximize return on investments made in the North.