• Weed & Turfgrass Science
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• v.2 no.4
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• pp.408-412
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• 2013

Dollar spot caused by Sclerotinia homoeocarpa F.T. Benn. is a common and economically important turfgrass disease in South Korea. Fungicides mixture (propiconazole 25% + boscalid 47%) treatments, showing synergistic interaction, with three application rates (low: 50.3 ml $10a^{-1}$ and 97.5 g $10a^{-1}$, intermediate: 67.0 ml $10a^{-1}$ and 130.0 g $10a^{-1}$, and high: 100.5 ml $10a^{-1}$ and 195.0 g $10a^{-1}$) and two application intervals (10 and 15 days) were evaluated for control of dollar spot in creeping bentgrass golf course putting green. In both nontreated plots of field A and B, the disease has severed as 48.3 and 60.0% after the pathogen inoculation. Two fungicide mixture treatments showed significantly higher the disease control effect than a single fungicide treatment (propiconazole). Field A which showed more the disease severity but the fungicide still showed acceptable level of the disease efficacy (89.0%), significant differences in control value were not detected among treatments. The results suggest that the lower application rate of two fungicides mixture treatments may reduce the dollar spot disease severity in creeping bentgrass golf course putting green.

• Transactions on Control, Automation and Systems Engineering
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• v.4 no.4
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• pp.264-269
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• 2002

In this paper, Η$_{\infty}$ depth and course controller of an AUV(Autonomous Underwater Vehicle) using Η$_{\infty}$ servo control is proposed. The Η$_{\infty}$ servo problem is formulated to design the controllers satisfying a robust tracking property with modeling errors and disturbances. The solution of the Η$_{\infty}$ servo problem is as fellows: first, this problem is modified as an Η$_{\infty}$ control problem for the generalized plant that includes a reference input mode, and then a sub-optimal solution that satisfies a given performance criteria is calculated by LMI(Linear Matrix Inequality) approach. The Η$_{\infty}$ depth and course controller are designed to satisfy with the robust stability about the modeling error generated from the perturbation of the hydrodynamic coefficients and the robust tracking property under disturbances(wave force, wave moment, tide). The performances of the designed controllers are evaluated with computer simulations, and finally these simulation results show the usefulness and application of the proposed Η$_{\infty}$ depth and course control system.

• Journal of Korean Academy of Fundamentals of Nursing
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• v.13 no.3
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• pp.467-473
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• 2006

Purpose: This study was done to Identify the effects of a communication training program on communication skills and interpersonal relationships. Method: A communication training program was provided to student nurses who were selected as participants during a course of clinical practice. Of the students 23 were assigned to experimental group and 22 to the control group. The experimental part of the study was done with the experimental group during 6 week program course. The control group received only a communication theory course. Results: Communication and interpersonal relations scores on the post-test in the experimental group were significantly higher than in the control group. Conclusion: This program allowed nursing students to advance their communication skills during their clinical trials. These are skills which are necessary for nursing practice. The study demonstrated that a group training program that can provide students with practical support by improving the personal relationship.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 1998.04a
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• pp.101-110
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• 1998

The safe passing maneuver of a large vessel along the designed course through a narrow channel in the flow of strong current is greatly related with her maneuvering characteristics. This paper treats maneuvering characteristic of a large vessel changing her course with the use of her control surface in a narrow channel with strong current. In this paper, the author proposed mathematical models of calculating maneuvering motions of the very large LNG tanker altering course using her control surface and calculated passing tracks of the vessel through the channel and compared the calculated results with those of maneuvering simulations by a desk-top simulator. In general the motions with the calculated values and the simulated motions are well coincided with each other.

• Journal of Korean Academy of Nursing Administration
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• v.20 no.5
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• pp.587-598
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• 2014

Purpose:This study was conducted to identify the effects of an action learning based creative problem-solving (CPS) course on problem solving, creativity and team-member exchange in nursing students. Methods: A quasi-experimental study applying a non-equivalent control group pre-post design was employed. Sophomore nursing students (32 in the experimental group and 33 in the control group) were recruited from a university in G-city, Korea. Problem solving, creativity and team-member exchange were measured for the pretest and posttest using self-report questionnaires. Kolmogorov-Smirnov test, Chi-square, Fisher's exact test, t-test, and ANCOVA with SPSS/Win 20.0 program were used to analyze the data. Results: The scores for problem solving, creativity and team-member exchange in the experimental group were significantly higher than those of the control group. Conclusion: Results of this study indicate that an action learning based CPS course is an effective teaching method to improve nursing students' competencies. In the future longitudinal studies are needed to assess the long term effects of the course.

• The Journal of Korean Academic Society of Nursing Education
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• v.21 no.3
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• pp.373-381
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• 2015

Purpose: This study was conducted to examine the effects of a multicultural course on nursing students' multicultural acceptability and competency. Method: The research design for this study was a non-equivalent control group, non-synchronized pre- and post-test. The experimental group (n=28) took 13 weeks of the multicultural course, while the control group (n=28) received only regular classes over the same period. Pre- and post-tests were done to identify the effects of the program. The data were collected using self-administered questionnaires and analyzed using the PASW 18.0 program. Results: All indices of multicultural acceptability and competency in the experimental group were significantly higher than that of control group after the program, except for two: universality (a measure of multicultural acceptability) and multicultural awareness (a measure of multicultural competency). Conclusion: These results suggest that the multicultural course was effective in elevating the level of multicultural acceptability and competency among nursing students.

• 제어로봇시스템학회:학술대회논문집
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• 2005.06a
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• pp.1628-1631
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• 2005

Ship Autopilots are usually designed based on the PD and Pill controllers because of simplicity, reliability and easy to construct. However their performance in various environmental conditions is not as good as desired. This disadvantage can be overcome by adjusting works or constructing adaptive controllers. But those methods are complex and not easy to do. This paper presents a new method for constructing a Ship Autopilot based on the combination of Fuzzy Logic Control (FLC) and Linear Control Theory (Pill control). The new Ship Autopilot has the advantages of both the Pill and FLC control methodologies: easy to construct, and optimal control laws can be established based on ship masters' knowledge. Therefore, the new ship autopilot can be well adapted with parameter variations and strong environment effects. Simulation using MATLAB software for a ship with real parameters shows high effectiveness of the Fuzzy Pill autopilot in course keeping and course changing manoeuvres in comparison with the ordinary Pill ship autopilots.

• 제어로봇시스템학회:학술대회논문집
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• 2005.06a
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• pp.1791-1796
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• 2005

Semi-shield tunneling is one of the propulsion construction methods used to lay pipes underground between two pits named 'entrance' and 'destination', respectively. Usually a simple composition, such as 'a fiducial target at the entrance+a total station (TS)+a target on the machine', is used to confirm the planned course. However, unavoidable curved sections are present in small-sized pipe lines, which are laid after implementation of a road system, for public works such as waterworks, sewer, electrical power, and gas and communication networks. Therefore, if the planned course has a curved section, it is difficult to survey the course with the abovementioned simple composition. This difficulty could be solved by using the multiple total stations (MTS), which attaches the cross type linear LED target to oneself. The MTS are disposed to where each TS can detect the LED target at the other TS or the base point or the machine. And the accurate relative positions between each MTS and target are calculated from measured data. This research proposes the relative and absolute coordinate calculation algorithm by using three MTS to measure a curved course with 20m curvature at 30m maximum distance, and verifies the algorithm experimentally.

• Journal of Korean Academy of Fundamentals of Nursing
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• v.8 no.3
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• pp.324-333
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• 2001

Purpose: A quasi-experimental study was conducted to identify the effects on Self-efficacy, Fatigue, Coping Skills and Self-care Activities by Korean patients following a Systemic Lupus Erythematosus Self-Management (SLESM) Course. Methods : A two group pre-test and post-test design was used. The participants in the study were forty-one people with Systemic Lupus Erythematosis of which 21 subjects were assigned to the experimental group and 20 to the control group The experimental group received six weekly 2-hour group sessions, while the control group did not receive any intervention Outcome measures included self-efficacy, fatigue, coping skills and self-care activities. Baseline demographic and clinical variables did not differ between the two groups. Results : Patients who Participated in the self-management course showed significant decrease in fatigue (p= .038), improvement in self-efficacy (P= .001) and coping skills (p= ,048), increase in self-care activities (p= .003), and in the number of types of self-care activities(P= .048). Conclusion: Self-efficacy, coping skills and self-care activities improved and fatigue was reduced following the SLESM course. This study showed that a SLESM course is a good nursing intervention that can be offered in community settings.

• Journal of muscle and joint health
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• v.28 no.1
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• pp.50-60
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• 2021

Purpose: The purpose of this study is to verify the effect of improving global health nursing competency, understanding of international development cooperation and satisfaction of education for nursing students through the course of global health in nursing. Methods: This study is a design of similar experiments before and after the non-equivalent control group to verify the difference in degree between global health nursing competency and understanding of international development cooperation by the course of global health in nursing of nursing students. Results: The degree of global health nursing competency of the experimental group that took the course of global health in nursing has significantly improved compared to the control group that did not participate, and a total of 30 detailed items showed significant differences. Conclusion: In this study, the global health nursing competency and understanding of international development cooperation have improved since nursing students took the course of global health in nursing. It suggests that the development and evaluation of nursing curriculum is necessary at a time when the global health nursing competency needs to be improved.