• Journal of the Korean Association of Geographic Information Studies
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• v.8 no.2
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• pp.10-20
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• 2005

The change of stream creation has a very sensitive effect on runoff analysis model using the divergence characteristic of stream. Therefore, in this study, the threshold area of stream creation was examined the change characteristic of topographical parameters. The subject basin of the research was the upper basin of the Kumho water gage station which is located in the middle of the Kumho river. The 1:25,000 numerical geography which was constructed $10{\times}10m$ mesh was used. The range of investigation of topographical parameters are number of stream order, length, area, slope, basin relief, sinuosity ratio, drainage density and total stream length etc. It was found from the result of analysis that the threshold value of 1st order stream has a very big effect on topographical parameters of basin. It was found that the threshold area of stream creation was under $0.10km^2$, the parameters showed a big change but showed a very small change over $0.10km^2$.

• Journal of the Korean Ceramic Society
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• v.43 no.7 s.290
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• pp.421-426
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• 2006

[ $(BaSr)TiO_3$ ] thick films were prepared by tape casting method, using $BaTiO_3\;and\;SrTiO_3$ powder slurry in order to investigate dielectric properties i.e. dielectric constant, ${\varepsilon}_r$, Curie temperature, $T_c$. Grain growth within $(BaSr)TiO_3$ thick films was observed with increasing weight ratio of $BaTiO_3$. This observation can be explained by phenomena of substitution of $Sr^{2+}$ ion for $Bi^{2+}$ ion in the $BaTiO_3$ system. Also, the Curie temperature in $(BaSr)TiO_3$ thick films was shifted to lower temperature range with increasing $ SrTiO_3$. Furthermore, Curie temperature having maximum dielectric constant was in the range of $-40^{\circ}C\;to\;30^{\circ}C$, and hence sharper phase transformation occurred at Curie temperature. There occurred decrease in tunability and k-factor of $(Ba_{0.6}Sr_{0.4})TiO_3$ calculated from the dielectric constant, ${\varepsilon}_r$ above Curie temperature. In addition, above the $60^{\circ}C$, phase fixation was observed. This means that internal stress relief occurred with increasing $90^{\circ}$ domains.

• The Journal of Korean Society for School & Community Health Education
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• v.16 no.3
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• pp.31-40
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• 2015

Objectives: The study investigated constipation in male and female high school students and in order to provide data base for development of education and intervention programs aimed at preventing and managing constipation in high school students. Methods: The study used a technique of convenience sampling to mobilize the entire students in an academic high school in D region. Of the combined 360 copies of questionnaire distributed, 340 copies were collected and used for the final analysis. The gathered data were analyzed using frequency, percentage, and ${\chi}^2-test$ in SPSS 21. Results: The ratio of female students with constipation is significantly higher than that of male students with the condition(${\chi}^2=5.73$, p=0.017), and there were significant differences in exercise habits(${\chi}^2=26.75$, p<0.001), eating habits(${\chi}^2=43.19$, p<0.001), and bowel habits(${\chi}^2=22.96$, p<0.001) between female students and male students. Also there was significant difference in water intake between the normal group and the constipation group(${\chi}^2=10.01$, p=0.040). Significant differences between the two groups were also discovered in the level of perception of constipation(${\chi}^2=98.76$, p<0.001), bowel movement time(${\chi}^2=15.74$, p=0.008), and use of laxatives(${\chi}^2=17.68$, p<0.001) and enema(${\chi}^2=16.97$, p<0.001) for constipation relief. Conclusions: To prevent and manage constipation in high school students, education about healthy dietary, and bowel habits is required. Also there is an urgent need to improve the school toilet environment in order to respect the rights of students to void or defecate when necessary, a process which will require involvement of students, teachers, and other school staff.

• Herbal Formula Science
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• v.25 no.4
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• pp.449-456
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• 2017

Objective : Coptis rhizoma is traditional herb in Korean medicine, and Pelargonium sidoides extract has been used for relief of acute bronchitis in Western medicine. The present study examined the antibacterial effect of fusion formulation of Coptis rhizoma extract and Pelargonium sidoides extract against bronchial diseases bacteria. Methods : Test sample, fusion formulation of Korean and Western medicine, was prepared by mixing Coptis rhizoma extract and Pelargonium sidoides extract at a ratio of 1:2 (w/w). Antimicrobial properties of test sample were determined by agar diffusion assay and minimum inhibitory concentration (MIC) against bronchus diseases bacteria. Results : In agar diffusion assay, the highest amount of test sample (4 mg/disk) exhibited antibacterial activity against all microorganisms tested. Test sample showed the high activity for S. aureus (19.5 mm), C. diptheriae (16.5 mm), A. fumigatus (19.3 mm), F. nucleatum (22.7 mm) and Mycobactrium sp. (17.3 mm), whereas it showed a low activity for K. pneumonia (9.7 mm). The MIC value was determined as $250{\mu}g/m{\ell}$ against C. diptheriae. Test sample showed better growth inhibitory effects against S. aureus and A. fumigatus with the MIC valus of $125{\mu}g/m{\ell}$. Conclusion : These results suggest the possibility of application to chronic respiratory diseases of fusion formulation of Korean and Western medicine, which was prepared with Coptis rhizoma extract and Pelargonium sidoides extract.

• Transactions of the Korean Society of Mechanical Engineers
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• v.9 no.1
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• pp.40-46
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• 1985

Some problems such as toughness decrement and stess relief cracking (SRC), many occur when post weld heat treatment (PWHT) is applied to remove residual stress adn hydrogen. In this paper PWHT was carried out under the stress of 0, 98, 196 and 294 MPa (0, 10, 20 and 30kgf/mm$^{2}$ each) to simulate residual stress in HAZ of Cr-Mo steel. The effect of applied stress during PWHT on fracture toughness was evaluated by COD fracture toughness test, micro-hardnes test and observation of SEM. The experimental results are as follows; (1) Fracture toughness of weld HAZ was improved by PWHT, but it decreased as heat treated under the stress. (2)Hardness ratio under the stress of 294MPa (30kg/mm$^{2}$) was lower and fracture toughness was decreased than that of the no stress. (3) Applied stress in weld HAZ during PWHT assisted precipitation of over saturated alloying elements in the structure, so fracture surface at the stress of 294MPa (30kg/mm$_{2}$) appeared the grain boundary failure possibly one of the reasons for PWHT embrittlenment.

• Journal of Korean Foot and Ankle Society
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• v.6 no.1
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• pp.21-27
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• 2002

Pressure sores are an ulceration and necrosis of the skin and underlying tissue usually occur after prolonged or repeated pressure by interruption of blood flow from the small. vessels to the skin and deep tissue. The management of pressure sores is mostly difficult and requires prolonged hospitalization or repeated surgical interventions with a high recurrence rate. In this article we reviewed 14 cases of National Pressure Ulcer Advisory Pannel staging III, IV over the lateral malleolar area of the ankle in 2 years period from January 1999 to October 2001. The pressure over lateral malleolar area was mainly due to unique Korean sitting position with cross legs at flexed hips and knees or supine position of patient with external rotation of low extremity. Male to female ratio was 11: 3 and ages were between 36 and 83 (mean age: 67.1 years). Associated diseases were DM(7 cases), Hemiparesis caused by CVA(2 cases), Liver cirrhosis(2 cases), disarticulation of opposite hip due to squamous cell ca.(1 case), Intertrochanteric Fx.(1 case). Wound cultures reported Staphylococus, Pseudomonas and others. Abnormally elevated ESR and CRP were seen in 6 cases. Operative treatments were irrigation and debridement, direct closure with gravity drainage and skin grafting. The most important aspect of pressure sore treatment is pressure relief of the lateral malleolar area. Pressure-relieving Cast or Brace was helpful for local management and preventing recurrence.

• Journal of Environmental Health Sciences
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• v.9 no.2
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• pp.55-65
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• 1983

This survey was carried out to investigate the pattern of taking psychotropic drugs for 618 cases who visited 48 drugstores located as such four types of areas as business sections, gay quarters, residential sections and quasi-industrial areas from May, 1982 to March, 1983. The results are summarized as follows: I. The age distribution: The age group of 20-29 showed the highest distribution covering 35.6% as 220 out of 618 cases. The age groups of thirties and forties covered 23.0% and 19.0% respectively. The sex ratio was estimated as 1:1.86. 2. The occupational distribution: The unemployees composed the largest portion covering 53.7% as 332 out of 618. Above all the class of the housewives was 32.7%. 3. The marital status: The degree of distribution was higher on the sides of the group of married people than that of single and its percentage was 30.1. 4. The educational level: Most of the people who purchased the drugs had no knowledge of the effect of the drugs, and they covered 80.9%. 5. As for the motives, the twenties took psychotropic drugs in order to relief insomnia and that was the biggest major motive at the portion of 59.1%, 130 out of 618. 6. The age group of twenties who took the drugs for about 6 months showed the highest percentage of 52.7%. 7. The highest distribution appeared in the case that takes one or two tablets a day for less than 6 months. 8. The dosage distribution by the number of times taking the drugs The group of people that took the drugs more than 3 to 4 tablets a day as the number of 1 to 3 times covered 41.7\ulcorner0 of 187. 9. The most favorite psychotropic drugs: Lorazepam was showed to be the most favorite drugs by either male or female covered 50.9o70, 54.2\ulcornero respectively. 10. The motives of selecting drugs: The optional motives of selecting psychotropic drugs were showed 269 (43.5%) out of 618 cases that chose the drugs for themselves.

• Asian Pacific Journal of Cancer Prevention
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• v.14 no.2
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• pp.739-742
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• 2013

Background: This study was to evaluate the survival of patients with pleural and intraperitoneal malignant mesothelioma and to investigate the efficacy of chemotherapy (CT) as well as radiotherapy (RTH) and surgery compared to best supportive care (BSC). Materials and Methods: Forty patients with malignant mesothelioma (38 with pleural and 2 with intraperitoneal) were enrolled. Twenty seven patients underwent (CT) chemotherapy of which 2 also received (RTH) and surgery was only for biopsy in 15/40. Combination chemotherapy included cisplatin-gemcitabine, cisplatin-navelbine and cisplatin (or carboplatin) with premetrexed. Thirteen patients received only best supportive care. Results: A total of 12 (30%) patients were male, and 28 (70%) female. Median age was 54.0 years and the male/female ratio was 1/2.33 (P=0.210). Residential exposure played a major role in two regions, Helwan and Shoubra, in 20% and 15%, respectively. Overall mean survival time was $13.9{\pm}2.29$ months. That for patients who had received best supportive care was $7.57{\pm}1.85$ months, for chemotherapy was $16.5{\pm}3.20$ months, and multimodality treatment regimen $27{\pm}21.0$ months (P=0.028). Kaplan-Meier survival did not significantly vary for sex, residence and the pathological types epithelial, mixed and sarcomatous. The median survival for performance status and treatment modalities was significant (P=0.001 and 0.028). Best supportive care using opioids with a mean dose of 147.1 mg (range 0-1680) of morphine sulphate produced good subjective response and reasonable quality of life but did not affect survival. Conclusions: We conclude that CT prolongs survival compared to BSC in patients with malignant mesothelioma. Moreover, using escalating doses of opioids provides good pain relief and subjective responses.

• Journal of Korean Neurosurgical Society
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• v.37 no.2
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• pp.105-111
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• 2005

Objective: Tremor, either essential tremor or Parkinsonian tremor, has been effectively and safely treated by lesioning the ventral intermediate(Vim) nucleus of the thalamus with or without mircroelectrode recording. The authors evaluate the treatment outcome of sixteen tremor patients who had been treated with thalamotomy without microelectrode. Methods: Between September, 2001, and December, 2003, sixteen tremor patients were treated with thalamotomy without microelectrode recording. Twelve patients suffered from Parkinsonian tremor and four patients were essential tremor patients. The male to female ratio was 1.6 to 1 with median age of 59.6 years (range; 39-74 years). Under local anesthesia, a 3mm hole was made using a hand-held twist drill, and the dura mater was penetrated with a 1.2mm sharp drill beat. Radiofrequency(RF) electrode was placed in the Vim nucleus of thalamus. With intraoperative macrostimulation, RF lesion was made. Postoperative CT scan and/or MR imaging was performed to confirm the localization of the target lesioned. Preoperative and postoperative tremor was evaluated with simple tremor severity scale and the development of complications related with the procedure was closely reviewed at the immediate postoperative period and the last follow-up. Results: It produces immediate relief in up to 98.4% of the patients. There were no development of complications related with procedure, all patients discharged one or two days after surgery. Conclusion: Vim thalamotomy without microelectrode recording is a safe and effective procedure to control the tremor with minimal morbidity. Intraoperative macroelectrode stimulation safely localizes the Vim nucleus target of the thalamus for the treatment of patients with tremor.

• Journal of Korea Water Resources Association
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• v.46 no.9
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• pp.909-919
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• 2013

This study examines the hydraulic characteristics, the channel changes, the behavior of bars, and bank stability by means of laboratory experiments. Three sets of laboratory experiments are conducted to elucidate the influence of riparian vegetation of the channels with erodible banks. Flow velocity is decreased in the vegetated zone, the mobility of lower channels is decreased. The double Fourier analysis of the bed waves shows that 1-1 mode (alternate bar) is dominant at the initial stage of the channel development. As time increases, 2-2 and 2-3 modes (central or multiple bars) are dominant due to the increased width to depth ratio. As the vegetation density is increased, the number of bars are increased, bank stability increases. The variation of sediment discharges is affected by vegetation density. The braided intensity is decreased with vegetation density. As the vegetation density is increased, the correlation coefficient of bed topography and bed relief index is increased.