Wire Pieces를 添加한 Concrete Beam의 휨引張 强度에 關한 硏究

鄭海駿,姜準默 충남대학교 공업기술개발연구소 1975 工業技術開發硏究所論文集 Vol.2 No.2

Todays the range that concrete material occupies of all the constructive materials is larger than any other material. Concrete material occupying the major part as all the constructive materials has a lot of merits, but the greatest defect is that tensile strength is low to compressive strength as we can disregard its values in engineering. Therefore concrete needs a certain material reinforcing this. As reinforce, we have reinforced the defect of concrete by inserting metal rinforcement in it. In this study, thinking a great many wire pieces can be produced, dynamic character is excellent, and construction method is easy, the authors used wire pieces as a mixture to reinforce concrete. This experimental result is to present a practical possibility.

先電離 窒素레이저에 의하여 펌프된 色素레이저

양준묵,추한태,이봉연 충남대학교 1991 忠南科學硏究誌 Vol.18 No.2

A preionized nitrogen laser with average output power of 3.0 mW in repetition rate of 30 Hz was constructed to be used as a pump for dye lasers such as rhodamine 6G, rhodamine B, coumarin 120 and coumarin 102. Under the optimum dye concentrations and wavelengths, dye laser average output power of rhodamine 6G, rhodamine B, coumarin 120 and coumarin 102 were obtained to be 1.6 mW, 1.1 mW, 1.1 mW respectively. According as nitrogen laser average output power was increased up to 76% by preionization effect, dye laser average output powers of rhodamine 6G, rhodamine B, coumarin 120 and coumarin 102 were increased up to 23%, 38%, 57% and 71% respectively. The nitrogen laser system used for this research can be utilized in dye lasers covering the entire visible spectra and if the nitrogen laser output power is improved, the output power of the coumarin 102 dye laser can be improved higher than that of the rhodamine 6G dye laser.

방전간극내의 기체 압력변화에 따른 질소레이저의 동작특성

양준묵,이승철,추한태 충남대학교 자연과학연구소 1989 忠南科學硏究誌 Vol.16 No.1

질소레이저의 반복률과 출력 특성에 미치는 요소는 여러 가지가 있는바 방전간극내 기체압력 역시 커다란 영향을 미치고 있다. 본 연구는 이를 위하여 펄스형 전원, 다중 평행판 측전기형 Blumlein 전송회로, 고속고압 방전간극 그리고 길이 66cm의 레이저관으로 구성된 레이저를 제작하였으며 방전간극내에 주입된 질소기체의 압력을 1bar, 1.4bar, 1.8bar, 2.2ba로 변형시켜 가며 동작특성을 측정하였다. MCA와 검출기를 사용하여 측정된 최적동작특성은 방전간극거리 1.12mm에서 방전간극내 질소기체압력이 2.2bar, 레이저관내의 질소기체 압력이 60torr이었고 반복률과 안정도는 각각 90Hz, 2% 이었다. We constructed a nitrogen laser system which was consisted of pulse type high voltage power source, multiple parallel capacitor type Blumlein transmission line circuit, rapid high voltage spark gap, 66cm long laser tube and synchronized trigger system and studied on the operational characteristics of this laser when the pressure of nitrogen gas filled in the spark gap was changed into four steps as 1bar, 1.4bar, 1.8bar, 2.2bar. Using the MCA and silicon detector, the optimum operational characteristics were obtained to be nitrogen gas pressure of 2.2bar in spark gap spacing of 1.12mm, nitrogen gas pressure of 60 Torr in laser tube, repetition rate of 90Hz and stability of 2%.

고속고압 방전간극을 사용한 질소 레이저의 동작 특성

양준묵,이치원,안근옥 충남대학교 자연과학연구소 1987 忠南科學硏究誌 Vol.14 No.2

We have constructed a nitrogen laser which is 42㎝ long has a rapid high-voltage spark gap and a multiple parallel capacitor-type Blumlein transmission line circuit, whose total capacitance is about 80 nF. The maximum output power of laser has obtained under the condition of nitrogen gas pressure of 80torr, spark gap spacing of 2.26mm and charging voltage of 10.5kV. Under these optimum conditions and maintaining constant stability of 0.02, this laser can be operated with a range of repetition rate, from 10 to 30.1 Hz. The value of E/P is 437 V.cm^-1. torr^-1 for maximum output power and 417 Vcm^-1. torr^-1 for optimum stability condition.

질소레이저의 개발에 관한 연구

梁俊默,琴彩,崔哲圭 충남대학교 기초과학연구소 1983 연구논문집 Vol.4 No.-

We have studied a Blumlein nitrogen laser which can be operated with a high stability. This has been obtained from a laser tube powered by a pulse forming network in the form of a parallel plate transmission line with low impedance. The energy storage capacitor and the transmission line are constructed with 0.05㎜ thick Al plates and 0.189㎜ thick Mylar films ; their capacitance is 90 ㎋ identically. The water cooled electrodes with separation of 0.3㎜ are 66㎝ in length and connected to the storage capacitor and the transmission line respectively. The best lasing action of the nitrogen laser is observed at laser tube pressure of 12 Torr, charging voltage of 3050 Volts, the repetition rate 28 ㎐, and the spark gap-separation of 7.4㎜. (with the electrode separation 0.3㎜). In this circumstance, the value of E/p is about 847 Volts·㎝^-1·Torr^-1 which is about eight times as large as the values that have been reported by the previous authors.

高張力 Bolt를 Dowel로 利用한 合成桁에 關한 硏究

鄭海駿,姜準默 충남대학교 공업기술개발연구소 1976 工業技術開發硏究所論文集 Vol.3 No.2

This paper is a research on the coefficient of friction occured between the channel and concrete through a push-out testing. For preparing the test pieces, the authors meaured the size of a concrete slab according to the specification of the composite girder design, using the high tension bolts instead of various dowels for shear connector. The result showed the possibility to design composite girder under the condition of the coefficient of friction μ=0.38 using the high tension bolts.

한우에 감염된 Theileria sergenti merozoite의 순수분리와 genomic DNA probe에 관한 연구

채준석,이주묵,권오덕,채건상 全北大學校 基礎科學硏究所 1994 基礎科學 Vol.17 No.-

To make the genomic DNA probe of Theileria sergenti, the merozoites were purified from bovine crythrocytes. The infected erythrocytes were lysed by Aeromonas hydrophila(Ah-1) hemolysin, and the parasites were isolated by ultracentrifugation on a Percoll discontinuous density gradient. For construction of a T sergenti genomic DNA library, T sergenti DNA was digested with PstI and the fragments were ligated into the PstI site of pUC19 before transformation of Escherichia coli JM83. Out of thousands of transformants obtained by transformation of E coli JM83 with the genomic library, three plasmids were chosen. The sizes of the inserted DNAs were 2.9kb(2.4kb and 0.5kb) in pKTS1, 4.3kb in pKTS2 and 1.5kb in pKTS3, respectively. The DNA fragments used as probe KTS1(2.4kb), KTS2(4.3kb) and KTS3(1.5kb) were labeled digoxigenin-11-dUTP for the Southern hybridization. In Southern hybridization, all of the probes(KTS1, KTS2 and KTS3) reacted specifically to T sergenti DNA, but not to bovine leucocyte DNA. In order to find out the sensitivities of the digoxigenin-11-dUTP-labeled KTS1 and KTS3 as the probes, purified merozoite DNA and bovine DNA(control) were checked by dot blot hybridization with the probes. Both of the probes, KTS1 and KTS3, detected as minimum amount of 975pg of the T sergenti DNA, but not bovine DNA even to 500ng.

시뮬레이션을 활용한 DIO가공시스템에서의 운영정책의 비교평가

임준목,배기웅 大田産業大學校 1998 한밭대학교 논문집 Vol.15 No.1

In this paper, an integrated-automated manufacturing system called direct-input-output manufacturing system(DIOMS) is described. We only consider the operational aspect for DIOMS. Once DIOMS is designed appropriately, the system efficiency depends on the method of operation applied These operation problems include dispatching rules of storage/retrieval(S/R) machine, input sequence control methods and storage policies. In this paper, these control method are researched and under the given system conditions, DIOMS is modeled and simulated as to developed operational policies. For the performance characteristics, mean flow time and throughput are adopted. For each performance measure, an optimal operating policy and condition are determined.

Blumlein 전송회로에 의해 선전리되는 질소레이저의 동작특성 연구

양준묵,추한태,이봉연,이치원 충남대학교 1990 忠南科學硏究誌 Vol.17 No.2

The design and construction of nitrogen laser preionized with a Blumlein transmission line circuit is described. For the power supply, we have used a pulse type high voltage power source that can be produce 10 joule energy in a pulse. The condition of maximum output power is observed at N_2 gas pressure of 100 torr, spark gap distance of 6.0 mm, repetition rate of 30Hz with preionization, and the stability increases by 0.7%. The maximum increment of output power is achieved at pressure of 200 torr when preionization is used. Finally we can increase the output power by approximately 60% by using this work, and the E/P value is 133 V㎝^(-1) torr^(-1).

물류관련시스템의 표준화 방안에 관한 연구

임준묵,김동진,안병덕 大田産業大學校 1998 한밭대학교 논문집 Vol.15 No.1

In this paper, firstly, we look into the current states of domestic logistics related systems including packaging, loading/unloading, transportation, pallet, container, storage equipments and information systems. From the analyzed results, we present individual standardization issues and schemes for each part of logistics relaxed system.