• Korean Journal of Metals and Materials
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• v.47 no.8
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• pp.482-487
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• 2009

In order to investigate the effects of intermediate heat treatment between cold rolling passes on the hardness and corrosion properties of a Zr alloy incorporating Nb (Zr-1.49Nb-0.38Sn-0.20Fe-0.11Cr) strip, three different intermediate heat treatment processes ($580^{\circ}C{\times}4hrs$, $600^{\circ}C{\times}2hrs$ and $620^{\circ}{\times}1hrs$) were designed based on a recrystallization map and an accumulated annealing parameter. Test samples from the different processes were investigated by a hardness test, corrosion test, and microstructure analysis and appropriate heat-treatment conditions were thereupon proposed. The sample subjected to an intermediate heat treatment of $580^{\circ}C{\times}4hrs$ was harder than that undergoing $600^{\circ}C{\times}2hrs$ and $620^{\circ}C{\times}1hr$ while the corrosion resistance of the sample that received an intermediate heat treatment of $580^{\circ}C{\times}4hrs$ was superior to that of the other specimens. Considering the trade-off of hardness and corrosion resistance, an intermediate heat treatment process of $600^{\circ}C{\times}2hrs$ is proposed to improve the manufacturing process of the alloy strip.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.28 no.2A
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• pp.289-295
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• 2008

The purpose of this study was to examine the flexural behavior of reinforced concrete beams strengthened with CFRP strips. A total of 12 rectangular beams were tested. Test variables in this study were the shapes, bonded length and the number of longitudinal layers of CFRP strips. From the experimental study, flexural capacity of the beams strengthened with CFRP strips significantly increased compared to the reinforced concrete beam without a CFRP strip. Maximum increase of ultimate strength was found about 120% more than the control beam. In this test, most of the strengthened beams failed suddenly due to the debonding of CFRP strips. It is also observed that the debonding of the strip was initiated in the flexural zone of the beam and propagated rapidly to the end of the beam. The ultimate tensile strains of CFRP strips in this test were occurred at the level of 36% of rupture tensile strength of the CFRP strip, and an analytical approach to compute the flexural strength of reinforced beams strengthened with CFRP strips based on the effective stresses was conducted.

• The Journal of Dong Guk Oriental Medicine
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• v.4
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• pp.267-311
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• 1995

This study was performed to analyze the effects of WhoaDam-JiHae PyeongChunYak on contracted tracheal smooth muscle in rat. Transverse strips were used for the experiment using organ bath. The test strip was perfused with modified Krebs-Ringer Bicarbonate solution which was aerated with 95% $O_2$-5% $CO_2$ mixed gas and kept at $37^{\circ}C$. WhoaDam-JiHae PyeongChunYak extract and acetylcholine infused tracheal strip that was contracted with acetylcholine. The results were as follows : 1. The contractile force of tracheal strip by acetylcholine was significantly increased by Pinelliae Rhizoma, Arisaematis Rhizoma, Sinapis Semen. Typhonii Rhizoma, Peucedani Radix, Eriobotryae Folium, Platycodi Radix, Bambusae Caulis Taeniam, Benincasae Semen, Armeniacae Amarum Semen, Asteris Radix, Periliae Fructus, Mori cortex and Lepidii Semen. 2. Arisaematis Rhizoma($1{\mu}{\ell}/m{\ell}$, $3{\mu}{\ell}/m{\ell}$, $10{\mu}{\ell}/m{\ell}$) and Asteris Radix($1{\mu}{\ell}/m{\ell}$, $3{\mu}{\ell}/m{\ell}$) slightly relaxed the contracted tracheal strip by acetylcholine. 3. Farfarae Flos significantly relaxed the contracted tracheal strip by acetylcholine. 4. The contractile force of tracheal strip by acetylcholine was significantly increased by Stemonae Radix at $30{\mu}{\ell}/m{\ell}$, on the other hand Stemonae Radix at $100{\mu}{\ell}/m{\ell}$ significantly relaxed the contracted tracheal strip by acetylcholine.

• Journal of the Korean Society of Manufacturing Technology Engineers
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• v.19 no.3
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• pp.353-358
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• 2010

This research introduces a new and improved design for a pneumatic cylinder driven roll feeder wherein each of the principal rotating feeder parts is configured so as to have feeding accuracy and to be low manufacturing cost. The feed pitch accuracy of the proposed roll feeder was evaluated by measuring lengths of cut offs of the strip stock with a shear attached to an air press. The air press was designed, manufactured, and mounted on the same table of the proposed roll feeder such that the strip stock maintained horizontal plane until the strip stock entered into the shear. The proposed roll feeder and the air press were designed to be operated automatically by a PLC employed controller. The feed pitch accuracy of the proposed roll feeder was analyzed by setting the pitch as 10, 12.5, and 15mm. At each predetermined feed pitch, the proposed roll feeder was tested 300 times as one test set and replicated three times. The average lengths of the cut offs of the strip stock ranged from 9.98 to 10.13mm, from 12.42 to 12.57mm, and from 14.96 to 15.06mm at the predetermined 10, 12.5, and 15mm feed pitch, respectively, among the total of 900 samples of each feed pitch. Main cause of variation of the length of the cut off of the strip stock fed by the proposed roll feeder was considered to be fluctuation of the air press during recompressing period of the air compressor to pressurize the air in the air tank. The largest difference between the maximum and the minimum length of the cut off was appeared while the air compressor recompressing the air. The air compressor used for this study restricted the air delivered to the proposed roll feeder while it was still running. Thus, this air delivery restriction problem should be improved by stabilizing the air press while the proposed roll feeder is running.

• Tuberculosis and Respiratory Diseases
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• v.48 no.5
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• pp.773-780
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• 2000

Background : pH measurement is an important test in assessing the etiology of pleurisy and in identifying complicated parapneumonic effusion. Although the blood gas analyzer is the gold standard method' for pleural pH measurement, pH meter & pH strip methods are also used for this purpose interchangably. However, the correlation among the pH data measured by the three different methods needs to be evaluated. In this study, we measured the pH of pleural fluid with the three different methods respectively and evaluated the correlation among the measured data. Methods : From August 1999 to March 2000, we measured the pleural fluid pH in 34 clinical samples with three methods-blood gas analyzer, pH meter, and pH strip. In the blood gas analyzer and pH meter methods, the temperature of pleural fluid was maintained around $0^{\circ}C$ in air-tight condition before analysis and measurement was performed within 30 minutes after collection. As for the pH strip method, the pleural fluid pH was checked in the ward immediately after tapping and in the clinical laboratory of our hospital. This part is unclear. Results : The causes of pleural effusion were tuberculosis pleurisy in 16 cases, malignant pleural effusion 5 cases, parapneumonic effusion 9 cases, empyema 3 cases, and congestive heart failure 1 case. The pH of pleural fluid (mean$\pm$SD) was 7.34$\pm$0.12 with blood gas analyser, 7.52$\pm$0.25 with pH meter, 7.37$\pm$0.16 with pH strip of immediate measurement and 6.93$\pm$0.201 with pH strip of delayed measurement. The pH measured by delayed pH strip measurement was lower than those of other methods (p<0.05). The correlation of the results between the blood gas analyzer and pH meter(p=0.002, r=0.518) and the blood gas analyzer and pH strip of immediate measurement(p<0.001, r=0.607). Conclusion : In the determination of pH of pleural fluid, pH strip method could be a simple and reliable method under immediate measurement conditions after pleural fluid tapping.

• Journal of the Korean Geosynthetics Society
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• v.11 no.3
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• pp.43-51
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• 2012

This paper describes the stability evaluation of reinforced earth wall using geosynthetic strip based on field test. The wall facing, which is applied in field, is able to present excellent scenery, and the reinforcement has improvement effect of pullout resistance based on rounded band anchor. The measurement is conducted according to construction elapsed time of structure for earth pressure, horizontal displacement of wall facing and reinforcement strain in field test. The evaluation results show that the measured earth pressure is less than theoretical earth pressure due to dispersion effect of earth pressure by geosynthetic strip. The horizontal displacement of wall facing is also satisfied a empirical criteria. The measured strain of reinforcement had nearly no effect on stability of the reinforced earth wall. Therefore, the geosynthetic strip with rounded band anchor can be applied in the reinforced earth wall, and the reinforced earth wall with geosynthetic strip can be commonly used in field because it has a structural stability.

• Journal of the Korea Concrete Institute
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• v.24 no.4
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• pp.473-480
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• 2012

In order to develop an effecive seismic strengthening metghod for existing concrete structure, structural tests of aramid FRP reinforced RC columns are performed. The test variables were strengthening methods of aramid sheet and strip. The test results were evaluated by comparing strength and energy dissipation capacities of non-reinforced and reinforced specimens. The test result comparison showed that aramid sheet reinforcement on RC column was evaluated as the most efficient way to increase strength and energy dissipation capacity.

• The Journal of the Korean life insurance medical association
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• v.2 no.1
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• pp.75-81
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• 1985

Urine contains protein and nucleic acid(urea, uric acid, creatinine, ammonia, amino acids), various organic and inorganic materials, vitamin, hormone, enzyme etc. The examination of gualitative or quantitative change of the above mentioned materials and picking up the abnormal materials are useful to diagnose diseases. The test strip for examination of urine is applied to the routine test, monitoring of medical therapy and recurrence, self monitoring, and screeing in preventive medicine. We have been using multitest strip for checking the bacterial infection(nitrite), PH, protein, glucose, ketone body, urobilinogen, bilirubin and occult blood. So it is possible to diagnose three groups of diseases as follows, abnormal metabolism of the carbohydrate, diseases of kidney and other urogenital system, diseases of hepatobiliary system and hemolytic disease causing abnormal metabolism of bile juice.

• Fire Science and Engineering
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• v.15 no.1
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• pp.66-74
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• 2001

In order to improve the adhesion test methods for fire hose, 7 kinds of standards (KOFEIS, UL, FM, NFPA, BS, Chinese standard, JIS, JFEII standard) in 5 countries (Korea, USA, UK, China, Japan) were compared and adhesion tests were conducted by using the samples choosed randomly from the product produced in Korea. It was concluded that the sample size, the rate of seperation of a strip of the lining from the janet and standard judgment should be more differed and divided in accordance with the fire hose number in adhesion test to get the high Quality of fire hose.

• Journal of the Society of Naval Architects of Korea
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• v.36 no.2
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• pp.29-39
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• 1999

In this study, mathematical modelling for initial motion of test vehicle launched from sliding launcher is performed, and simulation results from this mathematical models are verified by comparing them with sea trial results. Especially, it is showed that models using strip method give better results than using empirical formulae and linear equations of motion. This mathematical model can give useful tools to design sliding launchers or test vehicles.