• Journal of Korean Academy of Nursing
• /
• v.43 no.4
• /
• pp.497-506
• /
• 2013

Purpose: This study was done to examine the intervention effects on the family of a family education program for pathological gamblers based on Community Reinforcement and Family Training (CRAFT). Methods: A quasi-experimental, nonequivalent control group pretest-posttest design was used. The participants were 44 families of pathological gamblers from G center in Gyung-gi Province and 5 Gam-Anon groups in Seoul City and Gyung-gi Province. The experimental group (n=22) attended the 6 weekly 2 hour-long CRAFT family education program. The control group (n=22) attended the 12-step program of Gam-Anon. Data were collected from November, 2011 to May, 2012. Results: Compared with the control group, the experimental group showed significant decrease in depression (p=.001) and state anger (p=.039). There were no significant differences between groups in the level of interpersonal communication, trait anger, the mode of anger expression and self-esteem. Conclusion: Findings from this study suggest that the CRAFT family education program is effective in decreasing depression and state anger in families of pathological gamblers.

• Transactions of the Korean Society of Mechanical Engineers A
• /
• v.21 no.12
• /
• pp.2209-2219
• /
• 1997

A split hopkinson bar could be used for obtaining the high strain rate material properties of sheet metals for an autobody. In high speed tensile tests of sheet matals, a new design of a tension split Hopkinson bar apparatus is needed. The design of grips and an anvil length are numerically analyzed with ABAQUS/Explicit for the new apparatus of split Hopkinson bars. From the experiments with the new apparatus, the material properties of SPCEN in the high strain rate state have been acquired and compared with quasi-static experimental results. The material properties of SPCEN as well as other sheet metals in an autobody are indispensible for the analysis of crashworthness. Nevertheless the experiment of sheet metal in the high strain rate state has not been done or reported.

• Journal of Theoretical and Applied Mechanics
• /
• v.2 no.1
• /
• pp.31-50
• /
• 1996

In this paper, a finite element analysis based on the local approach concept to fracture in the continuum damage mechanics is performed to analyze ductile fracture in two dimensional quasi-static state. First an isotropic damage model based on the generalized concept of effective stress is proposed for structural materials in the context of large deformation. In this model, the stiffness degradation is taken as a measure of damage and so, the fracture phenomenon can be explained as the critical deterioration of stiffness at a material point. The modified Riks' continuation technique is used to solve incremental iterative equations. Crack propagation is achieved by removing critically damaged elements. The mesh size sensitivity analysis and the simulation of the well known shearing mode failure in plane strain state are carried out to verify the present formulation. As numerical examples, an edge cracked plate and the specimen with a circular hole under plane stress are taken. Load-displacement curves and successively fractured shapes are shown. From the results, it can be concluded that the proposed model based on the local approach concept in the continuum damage mechanics may be stated as a reasonable tool to explain ductile fracture initiation and crack propagation.

• Asian Oncology Nursing
• /
• v.7 no.2
• /
• pp.162-168
• /
• 2007

Purpose: This study was aimed to compare two different kinds of pre-operational education methods on nursing care satisfaction and anxiety among family members of cancer patients. Methods: This research used a quasi-experimental design. A total of 80 patients participated in the study. Forty subjects who were in the experimental group were assigned to be received mobile text-information via cellular phone, whereas control group was given the direct messages from nurses during peri-operative time. Peri-operative family needs and anxiety were measured and analyzed by X2-test and t-test. Result: There was no statistically significant difference in the levels of peri-operative family needs satisfaction and the levels of state anxiety between the two groups (p= .05). Conclusion: Based upon these findings, the nursing intervention with cellular phone short message could be as effective as direct peri-operative information in reducing the level of state anxiety and in increasing of the level of nursing care satisfaction among the family members of cancer patients.

• The Journal of Korean Institute of Communications and Information Sciences
• /
• v.29 no.12B
• /
• pp.1063-1069
• /
• 2004

There are some problems with the methods of paging and routing cache(PRC) and quasi soft handoff that are proposed to improve the performance for the transmission of real time data. This paper proposed a reasonable solution of these problems by proposing a new method using a combined cache(CC) and applying a different handoff procedure according to each type of data. The combined cache dose not maintain the handoff state but the idlle/active state. The simulation results in a better performance than the above methods in terms of the control packet traffic load, initial recevied data packet traffic load and arrival tune of real time packet at the epoch of handoff.

• Journal of Ocean Engineering and Technology
• /
• v.30 no.4
• /
• pp.260-267
• /
• 2016

Considering the effect of dynamic response amplification, a reliability analysis of an offshore wind turbine support structure under an earthquake is presented. A reliability analysis based on the dynamic response requires a large amount of time when using not only a level 3 approach but also level 2 such as a first order reliability method (FORM). Moreover, if a limit state is defined by using the maximum stress at a structural joint where stress concentration occurs, a three-dimensional element should be used in the finite element analysis. This makes the computational load much heavier. To deal with this kind of problem, two techniques are suggested in this paper. One is the application of a quasi-static structural analysis that takes the dynamic amplification effect into account. The other is the use of a stress concentration factor to estimate the maximum local stress. The proposed reliability analysis is performed using a level 2 FORM and verified using a level 3 simulation approach.

• Korean Medical Education Review
• /
• v.18 no.1
• /
• pp.16-20
• /
• 2016

Although the state of medicine in North Korea is of great interest, there is little information, if any, about the present state of medicine in North Korea. Even North Korea's laws and regulations on medicine are not publicly available. It is plausible that the dictator's commands or the policy of the Communist Party may be superior to the nation's constitution and laws on medical education and much more. Information is only available from a limited number of publications and mainly from the statements of refugees, which differ greatly among themselves. No one refugee could provide authoritative data or information because they were never in the position to see the larger picture or have experience over the long term. However, what is known is that the major health professions in North Korea include physicians (medical doctors), stomatologists (oral doctors), 'Koryo' doctors (doctors of Korean traditional medicine), midwives, and nurses. The names and the founding year of each of the regular medical schools are listed along with the change and restoration of names of schools. It is known that there have been quasi-physicians and semi-physicians. However, the reasons for any changes that have taken place also remain unknown. The educational system, curriculum, and even the number of years of training needed to qualify to become a physician have varied from time to time.

• Coupled systems mechanics
• /
• v.8 no.3
• /
• pp.273-287
• /
• 2019

Elastoplastic analysis of an annular disc, being fully constrained on its outer rim and interacting with a purely elastic inclusion perfectly bonded with its inner rim, is conducted to study its plastic deformation and residual stress under thermal cycles. The system is termed the composite disc. Quasi-static plane-strain deformation is assumed, and the von Mises yield criterion with or without the Ludwik hardening rule is adopted in our finite element calculations. Effects of multiple material properties simultaneously being temperature dependent on the plastic behavior of the composite disc are considered. Residual stress is analyzed from a complete loading and unloading cycle. Results are discussed for various inclusion radii. It is found that when temperature dependent material properties are considered, the maximum residual stress may be greater than the maximum stress inside the disc at the temperature-loaded state due to lower temperature having larger yield stress. Temperature independent material properties overestimate stresses inside materials, as well as the elastic irreversible temperature and plastic collapse temperature.

• Journal of the Korean Society for Precision Engineering
• /
• v.12 no.3
• /
• pp.101-109
• /
• 1995

Axisymmetric and quasi-static finite element analysis of an inflated tire rotating with constant angular velocity and contact to road has been performed. Centrifugal force effect was added to load stiffness matrix and equation of effective material properties were calculated by the Halpin-Tsai formulation. In this report, radial truck/bus tire was analyzed. It was inflated and rotated at speeds up to 140 km/h. Then, contact problem was performed to calculate stress-strain field of tire wiht flat rigid road under the load due to the self-weight of a vehicle. Significant changes of stress-strain field of tire were observed in the finite element analysis. Shear stress, strain and strain energy density were rapidly increased at the dege of #2 belt at freely rotating state. This concentrated stress and strain made belt edge sparation. Under the condition of flat riged road contact, strain energy density of #2 belt, carcass turn-up part were concentrated and bigger values than only freely rotation state. Therefore, dynamic behaivor of tire has to considered as design factors which are affected to belt edge separation and bead breakage.

• Physical Therapy Rehabilitation Science
• /
• v.4 no.1
• /
• pp.28-31
• /
• 2015

Objective: Psychomotor imagery has been widely used to improve motor performance and motor learning. Recent research suggests that during visualization, changes occur in neurophysiological networks that make physical practice more effective in configuring functional networks for skillful behaviors. The aim of our pilot study was to determine if there was change and to what extent there was differentiation in modulation in electroencephalography (EEG) frequencies between visualizing a state of rest and a state of exercise performance and to identify the preponderant frequency. Design: Quasi-experimental design uncontrolled before and after study. Methods: EEG brain wave activity was recorded from 0-40 Hz from nine cerebral cortical scalp regions F3, Fz, F4, C3, Cz, C4, P3, POz, and P4 with a wireless telemetric EEG system. The subjects, while sitting on a chair with eyes closed, were asked to visualize themselves in a state of routine rest/relaxation and after a period of time in a state of their routine exercise performance. Results: The gamma frequency, 31-40 Hz, (${\gamma}$) was the predominant wave band in differentiation between visualizing a state of rest versus visualizing a state of exercise performance. Conclusions: We suggest these preliminarily findings show the EEG electrocortical activity for athletes is differentially modulated during visualization of exercise performance in comparison to rest with a predominant ${\gamma}$ wave band frequency observed during the state of exercise. Further controlled experimental studies will be performed to elaborate these observations and delineate the significance to optimization of psychomotor exercise performance.