• Korean Journal of Air-Conditioning and Refrigeration Engineering
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• v.10 no.6
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• pp.666-673
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• 1998

Solubilities (LiBr+$CaC1_2$) in water were measured at temperatures form 267.51 to 306.17K for $CaC1_2$ (LiBr+$CaC1_2$)=0.24 by mole. Experimental data were correlated with polynomial equations. Average absolute deviations between the measured and calculated values were 0.31% at concentration smaller than 60wt% and 0.41% at concentration larger than 60wt%, respectively. Vapor pressures were measured at temperatures from 296.75 to 436.75K and concentrations from 40 to 70wt%. Vapor pressure data were fitted to a Antoine-type equation and average absolute deviation was 2.98%. The P-T-X chart and H-T-X chart of $H_2O$/(LiBr+$CaC1_2$) system were constructed by using the correlation equations of solubility, vaper pressure, and heat capacity. The P-T-X chart indicates that $H_2O$/(LiBr+$CaC1_2$) system has potential as a possible working fluid for air-cooled absorption chillers.

• Journal of Korean Society on Water Environment
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• v.25 no.5
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• pp.704-712
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• 2009

Advanced Phase Isolation Ditch (APID) process was studied to develop economic retrofitting technology, for the plants where retrofitting of common activated sludge process is required. In this study, to evaluate and monitor the effluent water quality ($BOD_5$, SS, T-N, and T-P) and operating conditions (Influent, SVI, SRT, and HRT) as process capable and stable parameters for treating municipal wastewater, a demonstration plant was installed and operated in the existing sewage treatment plant of P city. During this study, the average effluent $BOD_5$, SS, T-N, and T-P concentrations were 7.7, 5.6, 10.8, and 1.6 mg/L. Trend analysis of influent $BOD_5$, SS, T-N, and T-P in APID process were illustrated that APID process need for more strong APID process management on the winter session, such as developing new intermediated aeration mode, operating methods, and managements strategy. At the application of control chart, the signal of uncommon effects at APID process was determined much higher existing control chart tntr conventional control chart in this study. These results indicate that conventional control chart has been collected and determined cleary signal at only stable situation. Therefore, newly developed APID process of dynamic control chart can be one of the useful tool for monitoring and management process.

• Korean Journal of Adult Nursing
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• v.24 no.4
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• pp.348-357
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• 2012

Purpose: This retrospective chart review study was carried out in order to examine the frequency of delirium, and to identify the risk factors associated with the development of delirium in elderly patients with arthroplasty. Methods: Data were collected from medical records of patients who received arthroplasty during one and half year in a hospital. Three hundred sixty five patients were selected for the study. The onset of delirium was reviewed based on the result of psychological doctor's consultation or nurse's assessment with Confusion Assessment Method and delirium onset risk factors were examined. Data were analyzed with descriptive statistics, t-test, $x_2$-test, Fisher's exact test and logistic regression analysis. Results: Delirium occurred with 31 patients (8.5%) out of 365 patients who underwent arthroplasty. There were statistically significant differences between incidence of delirium and gender ($x_2$=6.11, p=.025), age ($x_2$=32.81, p<.001), hearing difficulty ($x_2$=8.08, p=.012), albumin level of preoperational day (t=-3.43, p<.001), albumin (t=-2.20, p=.028) and hemoglobin level (t=-2.83, p=.005) of operational day. Age and gender were the most significant predictive factors with regard to the incidence of delirium. Conclusion: Through understanding of these results, nurses will be able to identify those patients who may be at risk for developing delirium in early stages.

• The Korean Journal of Rehabilitation Nursing
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• v.3 no.2
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• pp.127-140
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• 2000

The purpose of this study is to identify the effect of sexual rehabilitation education on the knowledge and adjustment of sexual of spinal cord injury clients by the method of nonequivalant control group pretest-posttest group. The data were collected from Jan. 19 though Feb. 16, 2000. The experimental group was 26 spinal cord injury client from one rehabilitation center, and the control group was 26 spinal cord injury client from two rehabilitation center. Sexual rehabilitation education was done with manuals, videotapes and chart. Education time was 120 minutes a week for 2 weeks. The study tool was about Sexual Knowledge, designed Song, Chung Sook(1990) and SIAC(Sexual, Interest, Activity, & Satisfaction) designed Kruter, Sullivan, Siosteen(1994) translated by Kang, Hyun Sook, Koh, Jung Eun, Suh, Yeon Ok, Yee, Oon Hee(1999). The collected data were analyzed SPSS program. The Data were analyzed descriptive statistics and $X^2$ test, Pearson's Correlation Coefficient, t-test, F-test (ANOVA), Duncan's multiple comparison test. The result were as follows. 1. The first hypothesis was accepted : The group educated about sexual rehabilitation has more sexual knowledge than those of the uneducated group(t = 7.412, p = .001). 2. The second hypothesis was accepted : The group educated about the sexual rehabilitation has more adjustment of sexual than those of the uneducated group(t = 5.524, p= .001). 3. The third hypothesis was accepted: The higher sexual knowledge state, the higher sexual adjustment(r= .449, p= .003). According to results, sexual rehabilitation education helps Spinal cord Injury Clients to gain knowledge and adjustment of sexual.

• Journal of the korean academy of Pediatric Dentistry
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• v.23 no.4
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• pp.788-799
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• 1996

The purpose of this study was to determine the accuracy of the prediction methods which are frequently used in the clinic, such as Moyers', Tanaka and Johnston's, Song's Hixon and Oldfather's, Kaplan's, Smith's. These prediction methods were compared to the data, which were obtained from 100 Kyung-Hee University students (50 males and 50 females) with normal occlusion of permanent dentition, using a retrospective statistical analysis. The standard periapical radiopgraphs for the lower premolars using 16-inch long cone technique and the yellow stone dental casts were taken from each samples. The mesiodistal widths of 4 incisors, canine, premolars were measured on the dental casts, and those of premolars were measured on the radiographs. The correlation coefficients, paired samples t-tests, regression coefficients between the actual measuredments of the samples and the predicted measurements of each methods were analyzed. The results obtained were as follows: 1. The prediction methods using periapical radiographs tended to show a stronger correlation than the methods using dental casts; the correlation coefficients between the actual widths of the lower canine and premolars and the predicted widths of the tested methods were higher in Smith, Kaplan, Hixon & Oldfater, and Tanaka & Johnston (p<0.001). 2. The Moyers' probability chart at 65 % showed a tendency toward the least difference between the actual measurements and the predicted widths of the lower canine and the premolars, and the methods of Smith, Kaplan, Tanaka & Johnston also showed a less difference. 3. By means of evaluation in correlation coefficients and paired smaples t-tests, the Smith and Tanaka & Johnston in male, and the Moyers' 65 % and Song in female showed a high tendency toward accurate methods. 4. The regression equations by models that are derived from the study were as follows: Male(Lt.) :Y=10.799+0.475X Femle(Lt.) :Y= 7.427+0.609X (Rt.) :Y=11.043+0.462X (Rt.) :Y= 8.475+0.556X 5. The regression equations by radiographs that are dericed from the study were as follows: Male(Lt.) :Y=6.5651+0.9720X Femle(Lt.) :Y=4.8656+1.0632X (Rt.) :Y=7.8610+0.9060X (Rt.) :Y=4.5483+1.0843X