• Journal of Korean Academy of Nursing
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• v.36 no.8
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• pp.1331-1339
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• 2006

Purpose. The purpose of this study was to test the effects of infant massage (auditory (mother's voice), tactile/ kinesthetic (massage) and visual (eye to eye contact) stimulation) on weight and height of infant and mother-infant interaction with normal infants over a period of 4 weeks. Method. This study was designed as a nonequivalent control group pretest-posttest design. The experimental group infants (aged 2-6 months) participated in one of the infant massage programs at the health district center for 4 weeks. The control group (N=26) was paired with the experimental group (N=26) by matching the infant's age and sex. Infant weight, height, and mother-infant interaction were measured two times and recordings of the mother-infant interaction were done using the video equipment in a room at the health center for 10 minutes. Results. After 4 weeks of massage, there were no significant differences weight gain and height increase between the two groups. Comparison of the total scores for the mother-infant interaction between the two groups showed a significant difference (t=5.21, p=.000). There were also significant differences on maternal response (t=3.78, p=000), infant response (t=5.71, p=000) and dyadic response (t=4.05, p=000) in the mother-infant interaction between the two groups. Conclusion. Overall, the results of this study reassure that infant massage facilitates the mother-infant interaction for infants and mothers who give massage to their baby.

• The Journal of the Acoustical Society of Korea
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• v.28 no.2E
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• pp.35-42
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• 2009

In this paper, we present criteria of objective measurement of speech quality to provide the mobile-VoIP services efficiently over wireless mobile internet. The mobile-VoIP service, which is based on mobility and is error-prone compared to conventional VoIP over wired network, is about to be launched, but there have not been adequate quality indexes and the Quality of Service (QoS) standards for evaluating speech quality of Mobile-VoIP. In addition, there are many factors influencing on the speech quality in packet network of which packet loss contribute directly to the overall voice communication quality. For this reason, we adopt the Gilbert-Elliot Channel Model for modeling packet network based on IP and assess the voice quality through the objective speech method of ITU-T P. 862 PESQ and ITU-T P. 862.1 MOS-LQO under various packet loss rates in the transmission channel environments. Our simulation results address the specific criteria and QoS for the mobile-VoIP services in terms of the various packet loss environments.

• Journal of Animal Science and Technology
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• v.47 no.6
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• pp.1059-1066
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• 2005

The objective of this study was to investigate the physico-chemical characteristics of chicken breast surimi processed by four times washing (C) and adjustment to pH 3.0 (T1) and pH 11.0 (T2). Water, crude protein, myofibrillar protein and yield of the treatment C were lower compared to other two treatments. Crude fat of T2 was higher than other two treatments. pH, WHC, breaking force and deformation were not different among the treatments. Shear force of T2 was the highest, followed by T1 and C. L* of T2 and a* of T1 were lower than other two treatments. b* of C was the highest, while T2 was the lowest. Brittleness and hardness in textural properties were not different among the treatments. Cohesiveness of T1 was the lowest among three treatments. Springiness and chewiness of T1 and T2 were higher than those of treatment C, respectively. Gumminess of T2 were higher compared to C and T1. Appearance and flavor in sensory evaluation were the highest in T1 and the lowest in C among three treatments. Color, aroma, juiciness, tenderness and overall acceptability were not different among the treatments. In conclusion, physico-chemical quality of chicken breast surimi was the highest in T2 among three treatments.

• The Journal of Korean Society for School & Community Health Education
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• v.24 no.4
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• pp.1-11
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• 2023

Objectives: This study aims to identify influencing factors of disaster nursing competency among school health teachers. Methods: Data were collected from 110 school health teachers at the offfice of education in G province using a convenience sampling method. Data were analyzed by descriptive statistics, t-test, ANOVA, Scheffe test, Pearson's correlation coefficients, and multiple regression analysis. Results: There was a significant difference in disaster nursing competency according to the general characteristics of the subjects in terms of clinical nurse work experience (t=3.40, p=.001) and disaster education experience (t=2.80, p=.006). Disaster perception and disaster nursing competency showed a significant positive correlation (r=.43, p<.001). In final analysis, disaster perception (𝛽=.35, p<.001), career as a nurse (𝛽=.23, p=.009), experience in disaster education (𝛽=.17, p=.048) was found to have a significant effect on disaster nursing competency. Conclusions: Based on the results of this study, disaster perception should be raised to improve the disaster nursing competency of school health teachers. Speicalized disaster nursing & health education based on their experience before appointing school health teachers and disaster response simulation training tailored to school field conditions should be regularly conducted.

• 제어로봇시스템학회:학술대회논문집
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• 2004.08a
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• pp.272-276
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• 2004

The conventional PID (Proportional-Integral-Derivative) control technique is widely used for the process control in many industries since it is simple in structure and provides the good response. Nowadays, this control technique has been developed on the Programmable Logic Controller (PLC) to use for the process control loop. However, using this technique is difficult when tuning the PID parameters ($K_p$, $T_i$ and $T_d$) to achieve the best response. Moreover, trial-and-error procedure along with the operator experiences are required to obtain the best results when tuning the PID controller parameters. This paper proposes the self-tuning PID controller based on PLC for the process control in the industries. The proposed self-tuning PID controller uses the PLC-based PID structures to control the process production. The proposed PID tuning utilizes the PLC to synthesize and analyze controller parameter as well as to tune for appropriate parameters using Dahlin method and extrapolation. Experimental results using a self-tuning PID controller to control temperature of the oven show that the controller developed is capable of controlling the process very effectively and provides a good response.

• Transactions on Control, Automation and Systems Engineering
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• v.1 no.1
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• pp.44-49
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• 1999

This paper presents a new T-S(Tae-Sugeno) fuzzy controller design method satisfying the output energy bound. Maximum output energy via a quadratic Lyapunov function to obtain the bound on output energy is derived. LMI(Linear Matrix Inequality) problems which satisfy an output energy bound for both of the continuous-time and discrete-time T-S fuzzy control system are also derived. Solving these LMIs simultaneously, we find a common symmetric positive definite matrix P which guarantees the global asymptotic stability of the system and stable feedback gains K's satisfying the output energy bound. A simple example demonstrates validity of the proposed design method.

• Korean Journal of Adult Nursing
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• v.17 no.4
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• pp.656-667
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• 2005

Purpose: This study examined the mood state, activities of daily living, and attitude toward aging in the elderly according to the existence of a spouse and investigated the relation between these factors. Method: The subjects consisted of 190 elderly people, who were classified into two groups: those with and without a spouse. The data was collected from March to December 2004 using a structured questionnaire that included general characteristics, mood states, instrumental activities of daily living (IADL), and an attitude toward aging scale. The collected data was analyzed using the program SPSS, including descriptive statistics, $x^2-test$, ANOVA, Scheff's test, and the Pearson correlation coefficient. Result: 1. There were significant differences between the two groups in mood state (t=-3.349, p=.001), anxiety-depression (t=-3.350, p=.001), and anger (t=p=.003) in the mood state subscales, and in attitude toward aging (t=2.514, p=.013). 2. There was a significant positive correlation between vigor and IADL (r=.253, p=.012) in the elderly with a spouse. 3. When there was a spouse, there was a significant difference according to gender (t=2.587, p=.012) in IADL. Without a spouse, there were significant differences in mood states according to education level (F=3.315, p=.023), in anxiety-depression according to the presence of illness (t=2.156, p=.033), in vigor according to age (F=3.439, p=.020) and education level (F=5.285, p=.002), and in IADL according to monthly income (F=3.322, p=.023) and the presence of illness (t=2.172, p=.032). Conclusion: An individualized approach is needed for elderly people that considers living arrangements and the existence of a spouse.

• The Korean Journal of Emergency Medical Services
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• v.14 no.3
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• pp.29-40
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• 2010

Purpose: We investigated the motivation of selecting major, the satisfaction of major and the view on occupation of emergency medical technology (EMT) students. The results of study will be used to increase the satisfaction of major of university students. Also, it can be used to support decision of major for high school students. Method: We conducted 1,586 surveys from 665 students at six four-year colleges and 921 students at seven three-year colleges. Our research period was from Aug. 27th to Oct. 31st in 2010. The surveys were analyzed by SPSS 18.0 using description statistics, t-test, ANOVA, Scheffe and Pearson correlation coefficient. Result: In our study, the motivation of selecting major is 35.8% of students selected 'good employment prospects', satisfaction of major's $M{\pm}SD$ is $3.15{\pm}.486$, adaptation of major's $M{\pm}SD$ is $3.11{\pm}.472$. The satisfaction of major show difference (t = 4.548 p = .000) by sex, also the adaptation of major show difference (t = 2.279, p = .023) by sex. The satisfaction of major show first grade students higher (F = 3.605, p = .013) than fourth grade students at four-year colleges. If satisfaction of major is high, accumulation evaluation score is high (F = 3.276, p = .011), too. Clinical practice experienced students was higher (t = -2.878, p = .004) than non experienced it satisfaction. In view of occupation, ideal job's factors and actual job's factors a lot of students selected 'aptitude'. Also, there is a statistically significant correlation (r = .618, p = .000) between the satisfaction of major and the adaptation of major. High satisfaction indicates high adaptation of major. Conclusion: In our study satisfaction of major and adaptation of major was very high score. EMT students concern about employment prospects at most. It is inferred that they select job which match with one's aptitude. We can suppose that students select major as a tool for employment by seeing result that a lot of students consider employment prospects at most when they select major. A method to improve the satisfaction and adaptation of major should be developed by realizing problems which occur the dissatisfaction of major. Also, there as on why students conflict between ideal and actual job should be revealed. There as on seems students want stable occupation in unstable job market situation. Therefore, the expansion of job matching aptitude and being stable should be processed. Finally, university should actively support the method that help to finding jobs for student by identifying job preparation of students.

• The Journal of Korean Academic Society of Nursing Education
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• v.29 no.4
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• pp.352-361
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• 2023

Purpose: The purpose of this study was to construct the education applying the Havruta method for nursing students and to investigate the effects on self-directed learning ability, critical thinking, and learning commitment. Methods: A nonequivalent control group pre-posttest design was used. The participants were 63 nursing students (experimental group, n=31; control group, n=32) at two universities. The experimental group received education applying the Havruta method for five weeks. The study was conducted from September 1 to November 30, 2022. The data were analyzed using IBM SPSS 27.0 for an χ² test, Fisher's exact test, independent t-test, and Mann-Whitney U-test. Results: The experimental group had a significant increase in self-directed learning ability (z=-2.13, p=.033). However, there was no significant difference in critical thinking competency (t=0.64, p=.524) and learning commitment (t=0.04, p=.969) between the two groups. Conclusion: The Havruta method is an effective nursing education tool for self-directed learning ability. The result of this study could be a guide for nursing professors in designing and implementing educational programs that apply the Havruta method. In the future, research that applies the Havruta method and evaluates its effectiveness in nursing education programs should be continued.

• Asian-Australasian Journal of Animal Sciences
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• v.21 no.10
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• pp.1522-1528
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• 2008

The objective of this study was to develop a model for simulating gastric digestion in the pig. The model was constructed to include the chemical and physical changes associated with gastric digestion such as enzyme release, digestion product removal and gastric emptying. Digesta was collected from the stomach cannula of pigs to establish system parameters and to document the ability of the model to simulate gastric digestion. The results showed that the average pH of gastric digesta increased significantly from 2.47 to 4.97 after feed consumption and then decreased 140 min postprandial. The model described the decrease in pH within the pigs' stomach as $pH_t=5.182e^{-0.0014t}$, where t represents the postprandial time in minutes. The cumulative distribution function of liquid digesta was $V_t=64.509e^{0.0109t}$. The average pepsin activity in the liquid digesta was 317Anson units/mL. There was significant gastric emptying 220 min after feed consumption. The cybernetic dynamic system of gastric digestion was set according to the above data in order to compare with in vivo changes. The time course of crude protein digestion predicted by the model was highly correlated with observed in vivo digestion (r = 0.97; p = 0.0001), Model prediction for protein digestion was higher than that observed for a traditional static in vitro method (r = 0.89; p = 0.0001).