• Childhood Kidney Diseases
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• v.4 no.1
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• pp.1-5
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• 2000

Purpose: The plcr of spot urine has been uised to predict the timed urine protein excretion. Although this method reduces errors caused by variations in urine volume, it is relatively thconvenient and expensive. Recently, a more rapid and less expensive screening method with specific gravity(SG) has been reported, and we have examined whether estimated-creatinine(Cr-est) with urine 5G could be used in place of urine creatinine to predict 24-hour collected urine protein excretion in children. Methods: We had retrospectively analyzed protein, creatinine and urine SG in randomized spot urine samples of 147 patients from March 1998 till June 1998 in Korea university Guro hospital and compared the urinary protein creatinine ratio(P/Cr) with the protein estimated-creatinine ratio(P/Cr-est). We compared the correlation of urinary creatinine vs-urine 5G with the timed urine pretein excretion. Results: 1) urine SG accurately estimated urine creatinine concentration (r=0.407, P<0.001, Cr=SG x 4485.82-4482.87). 2) P/Cr correlated with urine protein excretion measured in a 24-hour urine collection (r=0.771, P<0.001, 24-hour collected urine protein : 0.338 x (P/Cr) 4+667.885). 3) P/Cr-est correlated with a 24-hour collected urine protein (r=0.723, P<0.001, 24-hour collected urine protein =0.354 x (P/Cr-est)+726.044), Conclusions: These results suggest that P/Cr-est with urine SG could be useful method for screening proteinuria in children.

• Journal of Platform Technology
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• v.9 no.2
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• pp.38-45
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• 2021

A frequently used bioimpedance analytical method in Korea is the segmental multi-frequency BIA (SMF-BIA) method, but it is not directly determined at a segmented impedance. This study was to compare SMF-BIA determinations with direct segmented determinations for accuracy and appropriateness of segment parameters. This study is to compare the segment parameters, accuracy and appropriateness of the multi-frequency segmental bioimpedance analysis. To this end, 108 elderly individuals were measured. Segmented bioelectrical measurements obtained from a SMF-BIA (Inbody S10) at 50 kHz and measured with a phase sensitive single frequency device (SF-BIA, bia-101, RJL / akern systems) were compared. The significant difference (%) was demonstrated between single - and multiple frequency determinations of the right upper limb (R = 35.5 ± 6.2%, P < 0.001; Xc = 2.7 ± 7.6%, P < 0.01), left upper limb difference (R= 33. 9 ± 6.0%, P < 0.001; Xc = 2.8 ± 8.3%, P < 0.01), right lower limb difference (R = 18.6 ± 4.3%, P < 0.001; Xc = 25.8 ± 10.0%, P < 0.001), left lower limb difference (R = 18.0 ± 4.7%, P < 0.001; Xc = 31.8%). Of the results determined with the two BIA methods, the impedance measurements of the limbs and whole body showed a high correlation (RA: R = 0. 950, LA: R = 0. 949, RL: R = 0.899, LL: R = 0.88), and in the agreement test, the impedance values of the upper limbs and whole body also showed strong agreement (ICC > 0.9), but in the Xc, the correlation was weak. In conclusion, it was found that although bioimpedance devices had significantly different characteristics and inconsistent cross sectionally, there was a high population level agreement in the upper and lower extremities in determining segmental resistance value changes. But a large error was found on the trunk. Further studies were needed for reducing the error.

• Polymer(Korea)
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• v.29 no.6
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• pp.593-598
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• 2005

This work studied the loading capabilities and release behaviors of poly(ethylene-alt-maleic anhydride) (PEMAh)/poly(4-vinyl pyridine) (P4VP) multilayer films formed by the layer-by-layer(LbL) sequential self-assembly method, using Rodamine 6G(R6G) as an indicator. Thickness of the multilayer, and loading and subsequent release behavior of R6G from the multilayer were studied using UV-visible spectroscopy. The amount of R6G loaded in multilayer film increased linearly with increasing film thickness. pH-Sensitive permeability was observed, where lower pH environments increased both release rate and release amount. By additional assembling of PEMAh/poly(ethyleneimine) (PEI) capping layers on top of (PEMAh/P4VP)n multilayers, the release of R6G was better controlled.

• Journal of Korean Public Health Nursing
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• v.11 no.2
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• pp.171-179
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• 1997

The purpose of this study was to identify the major factors affecting performance of health promoting behavior and Pender's health promotion model was examined. The subjects were 508 workers employed in 4 manufacturing industries, data was collected from May 19th to 24th, 1997 using questionaires and it was used convenient sampling method. Data were analyzed by SPSS Win 6.1 program. The results of this study were as follows 1. The average score of health promoting behavior was 2.47. 2. The Health promoting behavior in the relationships between health promoting behavior and demographic factors, there is statistically significant difference in age(F=2.56, P=.0378), religion(F=6.34, P=.0001), working type(F=4.56, P=.0036)variables. 3. The performance score of health promoting behavior was statistically positively correlated with Definition of health(r=.2471. P=.000), Self-efficacy(r=.1385, P=.002), Internal health locus of control(r=.126, P=.000), External health locus of control(r=.2550, P=.000), Chance health locus of control(r=.3023, P=.000), but negatively with Perceived health status(r=-.2076, P=.000). 4. The major factors were Chance health locus of control. Definition of health, working hours, self-efficacy, External health locus of control. and explained for $39.58\%$ of Health promoting behavior performance score.

• Journal of Korean Society of Environmental Engineers
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• v.38 no.4
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• pp.169-176
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• 2016

This research explored the feasibility of preparing and utilizing preformed polymeric solution of Fe(III) as coagulants for water treatment. The differentiation and quantification of hydrolytic Fe(III) species in coagulant was done by utilizing spectrophotometric method based on the interaction of Fe(III) with Ferron as a complexing agent. The properties of the synthesized polymeric iron chloride (PICl) showed that the quantity of polymeric Fe(III) produced at r = 1.5 was 20% of the total iron in solution, as showing maximum contents. Coagulation experiments were conducted under the condition of various coagulant doses and pH for each coagulant prepared. From the comparison of the characterization of coagulation for $FeCl_3$ (r = 0.0) and PICl (r = 0.5, 1.0, 1.5) coagulants, PICl (r = 0.5, 1.0, 1.5) coagulants was found to be more effective than other coagulant for the removal of organic matters. The experimental results for the coagulation tests at various pH ranges showed that the PICl was least affected by the coagulation pH and PICl was very effective for the removal of turbidity and organic materials over wide pH range (pH 4-9) tested.

• Journal of Korean Academy of Nursing
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• v.36 no.1
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• pp.127-135
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• 2006

Purpose: The purpose of this study was to identify the factors influencing symptom self management (SSM) in the patient with a chronic mental disorder. Method: Data was collected by questionnaires from 204 chronic mental disorders in an outpatient clinic in a General Hospital and Public Mental Health Centers in Seoul and Kyunggi Province. The data was analyzed using descriptive statistics, pearson correlation coefficients, and stepwise multiple regression, Results: The score of SSM showed a significantly positive correlation with the score of the level of self efficacy (SE) (r=.33, p=.00), social support (SS) (r=.27, p=.00), self care agency (SCA) (r=.36, p=.00) and daily living ability (DLA) (r=.34, p=.00). The score of DLA showed a significantly positive correlation with the score of level of SE (r=.46, p=.00), SS (r=.51, p=.00), and SCA (r=.52, p=.00), The most powerful predictor of SSM was SCA ($14\%$). A combination of SCA, DLA, and SS account for $20 \%$ of the variance in SSM. Conclusion: This study suggests that SCA, DLA, and SS are significant influencing factors on SSM in patients with chronic mental disorders.

• Journal of Korean Academy of Nursing
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• v.36 no.6
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• pp.925-932
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• 2006

Purpose: The purpose of this study was to identify the relationship between depression, perceived stress, fatigue and anger in clinical nurses. Method: A descriptive survey was conducted using a convenient sample. Data was collected by questionnaires from four hundred clinical nurses who worked at a university hospital. Radloff's CES-D for depression, Cohen, Kamarck & Mermelstein's Perceived Stress Scale, VAS for Fatigue, and Spielberger's STAXI for anger were used. The data was analyzed using the pearson correlation coefficient, students' t-test, ANOVA, and stepwise multiple regression with SPSS/WIN 12.0. Result: The depression of clinical nurses showed a significantly positive correlation to perceived stress(r=.360, p=.000), mental fatigue(r=.471, p=.000), physical fatigue(r=.350, p=.000), trait anger(r=.370, p=.000), anger-in expression(r=.231, p=.000), and anger-control expression(r=.120, p=.016). There was a negative correlation between depression and age(r=-.146, p=.003). The mean score of depression of nurses, 26, was a very high score and 40.8% of clinical nurses were included in a depression group. The main significant predictors influencing depression of clinical nurses were mental fatigue, trail anger, perceived stress, anger-in expression, and state anger, which explained about 32.7%. Conclusion: These results indicate that clinical nurses with a high degree of perceived stress, mental fatigue and anger-in expression are likely to be depressed.

• Transactions of the Korean Society of Mechanical Engineers
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• v.12 no.2
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• pp.349-358
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• 1988

Natural convection velocity and temperature profiles are obtained approximately in the core at boundary layer flow regime for varying Prandtl number in a low aspect ratio rectangular Enclosure. Analysis is based on the formally obtained core flow equations using the multiple scales method. Results show good agreement with the existing works for $P_{r}$ ~ 1. No comparison, however, is possible yet for $P_{r}$ >> 1 and $P_{r}$ < 1 due to the lack of available date. It is shown here that boundary layer flow regimes are governed by two parameters, A $R_{a}$$^{1}$4/ and A( $P_{r}$ $R_{a}$)$^{1}$4 for $P_{R}$.geq. 1 and $P_{r}$ < 1 respectively.ely.ively.ely.y.

• Journal of the Computational Structural Engineering Institute of Korea
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• v.19 no.4 s.74
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• pp.429-440
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• 2006

This paper comprises two specific objectives. The first is to examine the applicability of ordinary kriging interpolation(OK) to the p-adaptivity of the finite element method that is based on variogram modeling. The second objective Is to present the adaptive procedure by the hierarchical p-refinement in conjunction with a posteriori error estimator using the modified S.P.R. (superconvergent patch recovery) method. The ordinary kriging method that is one of weighted interpolation techniques is applied to obtain the estimated exact solution from the stress data at the Gauss points. The weight factor is determined by experimental and theoretical variograms for interpolation of stress data apart from the conventional interpolation methods that use an equal weight factor. In the p-refinement, the analytical domain has to be refined automatically to obtain an acceptable level of accuracy by increasing the p-level non-uniformly or selectively. To verify the performance of the modified S.P.R. method, the new error estimator based on limit value has been proposed. The validity of the proposed approach has been tested with the help of some benchmark problems of linear elastic fracture mechanics such as a centrally cracked panel, a single edged crack, and a double edged crack.

• Journal of Korean Academy of Nursing
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• v.34 no.2
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• pp.270-277
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• 2004

Purpose: The purpose of this study was to investigate the relationship between decision-making factors(theoretical knowledge, expertise, empowerment, intuition) and participation in proportion to nurses's clinical experience. Method: Data was collected by quota sampling from July 10, 2001 to August 22, 2001 from 132 clinical nurses who work for 3 General hospitals. Data was analyzed using SPSSWIN 10.0 with crosstab, ANOVA, and stepwise multiple regression. Result: Expertise(F=34.347, p=.000), empowerment(F=29.316, p=.000), and participation(F=3.276, p=.041) were significantly different among 3 clinical experience groups. Clinical experience correlated with expertise(r=.551, p=.000) and empowerment(r=.492, p=.000), and Decision-making participation also correlated with expertise(r=.351, p=.000) and empowerment(r=.265, p=.002). Decision-making participation is effected by theoretical knowledge(under 3.00yr clinical experience), expertise(3.01-5.00yr), and empowerment(above 5.01yr). Conclusion: These findings indicate that factors(theoretical knowledge, expertise, or empowerment) on decision-making participation varies as nurses's clinical experience differs. Therefore, decision-making needs bilateral agreement between staff nurses and nurse managers rather than the responsibility of one.