• Journal of Welding and Joining
• /
• v.27 no.4
• /
• pp.38-43
• /
• 2009

As it has been well appreciated, the weld-induced deformation control is one of the most important issues from view point of efficiency in ship production. The weld-induced deformation is more serious in the case of thin plate block than in the case of relatively thick plate block, since, for example, heat affect zone of thin plates is wider than that of thick plates for the same heat input. Among weld-induced deformation, buckling deformation due to shrinkage and residual stress in weld line direction is one of the most serious deformation type. This paper is concerned with the controling the buckling deformation of thin plate fillet weld by applying the tensioning method. Weld experiments have been carried out for specimens with varying the magnitude and direction of tension load. The results are graphically represented to show the effect of tensioning method upon reducing the weld-induced deformation. From the present findings, its has been seen that tensioning method is one of the useful ways to control the weld-induced deformation of fillet weld of thin plates.

• Journal of Ocean Engineering and Technology
• /
• v.22 no.1
• /
• pp.64-69
• /
• 2008

As it has been well appreciated from the viewpoint of efficiency, The weld-induced deformation control is one of the most important issues in marine structure production. In the case of thin plate block, weld-induced deformation is more serious than in the case of relatively thick plate block. The heat affect zone of thin plates is wider than that of thick plates with the same heat input. Among weld-induced deformations, the buckling deformation by the shrinkage and residual stress in the weld line direction is one of the most serious deformation types. This paper is concerned with controlling buckling deformations for the thin plate fillet welds, by using the tensioning method. A numerical analysis was carried out to illustrate several dominant buckling modes due to compressive residual stress in the fillet weldsof thin plates. Then, weld tests were carried out for 20 specimens with varying plate thickness, and with different magnitudes and directions for the tension load. The results graphically represented to shaw the effect of the tensioning method in reducing the weld-induced deformation. From the present findings, it was seen that the tensioning method is a useful way to control weld-induced deformations in the fillet welds of thin plates.

• Journal of The Korean Astronomical Society
• /
• v.30 no.1
• /
• pp.13-25
• /
• 1997

Sobolev approximation can be adopted to a macroscopic supersonic motion comparatively larger than a random (thermal) one. It has recently been applied not only to the winds of hot early type stars, but also to envelopes of late type giants and/or supergiants. However, since the ratio of wind velocity to stochastic one is comparatively small in the winds of these stars, the condition for applying the Sobolev approximation is not fulfilled any more. Therefore the validity of the Sobolev approximation must be checked. We have calculated exact P Cygni profiles with various velocity ratios, $V_\infty/V_{sto}$, using the accelerated lambda iteration method, comparing with those obtained by the Sobolev approximation. While the velocity ratio decrease, serious deviations have been occured over the whole line profile. When the gradual increase in the velocity structure happens near the surface of star, the amount of deviations become more serious even at the high velocity ratios. The investigations have been applied to observed UV line profile of CIV in the Copernicus spectrums $of\;\zeta\;Puppis\;and\;NV\;of\;\tau\;Sco$. In case of $\tau$ Sco which has an expanding envelope with the gradual velocity increase in the inner region, The Sobolev approximation has given the serious deviations in the line profiles.

• Membrane Journal
• /
• v.25 no.3
• /
• pp.239-247
• /
• 2015

The new types of phosphazene diagnostic membranes have been prepared for blood glucose measurements. The possible interferents in human blood were sorted into 4 different series and their effects on the glucose measurements were examined. In case of series I which indicates the lowest concentration, most of them did not show any serious effects on the blood glucose measurements, but only ascorbic acid (AA) showed 5~8% higher values compared to K/S values of the standard solution. In case of series II, all of four interferents showed 3~4% lower K/S values than those of plasma, but they showed consistent values by concentration variation. In case of series III, all of three interferents did not show any big differences compared to the standard solution. In case of series IV which indicates the highest concentration, two interferents showed 11~15% lower K/S values than the standard values, however they did not any serious effect on the blood glucose measurements.

• Tuberculosis and Respiratory Diseases
• /
• v.70 no.1
• /
• pp.69-73
• /
• 2011

The combination therapy of pegylated interferon and ribavirin is the mainstay of treatment for chronic hepatitis C patients. Anti-viral therapy is commonly associated with side effects such as headache, fever, myalgia, and arthralgia. However, anti-viral therapy can continue because these side effects are mostly mild and can be improved with supportive management. Anti-viral therapy should be stopped promptly if serious side effects, such as interstitial pneumonitis or hemolytic anemia occur, although those serious side effects are rare. There were a few case reports of interferon-related interstitial pneumonitis worldwide. In Korea, one atypical case report of interstitial pneumonitis has been reported, which followed the combination therapy of interferon-alpha and ribavirin in a patient with chronic hepatitis C. We present a case of interstitial pneumonitis and pancytopenia following the combination therapy of pegylated interferon and ribavirin in a patient with chronic hepatitis C.

• Journal of Haehwa Medicine
• /
• v.16 no.1
• /
• pp.9-16
• /
• 2007

Postpartum depression is a kind of serious problem which influences on the postpartum woman, her family and infant. It has been known to be caused by many factors and some depression scales have been used to assess the degree of postpartum depression. Edinburgh postnatal depression scale(EPDS) is simple and efficient method. Because of the difficulty of diagnosis and valuation on the postpartum depression, there has been a few case report on oriental medical treatment. I report one postpartum depression case which was valuated by EPDS and had objective evidence. In this case herbal treatment and acupuncture was efficacious on the postpartum depression. I think, though six month has passed from parturition, there need to be treated after parturition weakness and deficiency point of view.

• Childhood Kidney Diseases
• /
• v.21 no.1
• /
• pp.31-34
• /
• 2017

Tumor lysis syndrome is a serious complication of malignancy, resulting from the massive and rapid release of cellular components into the blood. Generally, it occurs after initiation of chemotherapy. The onset of spontaneous tumor lysis syndrome (STLS) before anti-cancer treatment is rare and occurs mostly in Burkitt lymphoma and non-Hodgkin's lymphoma. There are only a few case reports in children. Here, we report a case of STLS secondary to T-cell acute lymphoblastic leukemia (ALL), which presented with urinary stone and subsequent acute kidney injury with severe hyperuricemia. Occult malignancy should be considered in case of unexplained acute kidney injury with extreme hyperuricemia.

• The KSFM Journal of Fluid Machinery
• /
• v.15 no.6
• /
• pp.64-69
• /
• 2012

This paper deals with the study on repair case of journal shaft and bearing damage in 25MW industrial gas turbine caused by sudden blackout, operation mistake, and logic abnormal, etc. When a serious accident such as journal and bearing damage in a gas turbine occurs, the domestic local companies having the gas turbine are dependent on manufacturer for all maintenance and repair schedule until now. This case study shows that the damaged gas turbine is normally re-operated itself in domestic by establishing repair schedule in a short period of time, repairing damage journal shaft and tilting pad bearings, and performing rotating test for a reliability check. This paper can be regarded as the important case study of emergency test run experience of the refurbished 25MW gas turbine rotor.

• Journal of Chest Surgery
• /
• v.25 no.12
• /
• pp.1440-1443
• /
• 1992

Traumatic chylothorax is the presence of lymphatic fluid in the pleural space resulting from thoracic duct rupture, This condition is a serious and often life-threatening clinical entity. Operative trauma is most common mechanism of injury, but we experienced two case of chylothorax due to blunt trauma. One case was treated conservatively, another case was treated surgically.

• Journal of Chest Surgery
• /
• v.18 no.4
• /
• pp.740-745
• /
• 1985

A retrospective double blind study comparing 7 day with 2 day regimen of antibiotic prophylaxis was conducted among 200 patients undergoing open heart surgery. No case of endocarditis and wound infection occurred. Pneumonia developed in 5 cases of the 7 day and 1 case of the 2 day group. Urinary tract infection without clinical significance developed in 1 case of the 7 day and 3 cases of the 2 day group. Bacteremia developed in 2 cases of the 7 day and 1 case of the 2 day group. We concluded as follows: l. Administration of antibiotics for 2 days appears to be without substantial risk of infection comparing long term 7 day regimen. 2. 7 days of antibiotics may actually increase the risk of serious infection such as nosocomial pneumonia, and predispose to the development of infections with fungi or antibiotic resistant bacteria. 3. 2 days of prophylaxis is more beneficial than long term 7 day regimen for example economically.