• Journal of the Korean Society of Food Science and Nutrition
• /
• v.28 no.2
• /
• pp.452-457
• /
• 1999

The inhibitory effect of Coprinus comatus on the mutagenicity in Salmonella assay system and SOS chromotest were studied. In Ames test, the ethanol and water extracts and the cultured mycelia fractions of Coprinus comatus did not show any mutagenicity, but the Coprinus comatus ethanol extracts showed inhibitory effects of 8 0∼90% on the mutagenicity induced by indirect mutagen of benzo(a)pyrene(B(a)P) and aflatoxin B1(AFB1) in Salmonella typhimurium TA98 and TA100. The antimutagenic effect increased with increasing concentration of the ethanol extract toward N methyl N' nitro N nitrosoguanidine(MNNG). However, the water extracts inhibited about 40∼50% against direct and indirect mutagen. The cultured mycelial filtrate of Coprinus comatus, the fractionⅡ, showed antimutagenic effect of 90% on MNNG and 25∼50% on B(a)P and AFB1. In SOS chromotest, the ethanol extracts of Coprinus comatus showed antimutagenic effect of 65∼81% on SOS function induced by 4 NQO, and the cultured mycelia fractionⅡ showed low inhibitory effect of 20∼50%.

• Human Ecology Research
• /
• v.53 no.3
• /
• pp.331-339
• /
• 2015

This study investigates the effects of parental abuse and neglect on school life adjustment mediated by self-esteem in adolescents. Participants consisted of 2,259 middle school students from the Korean Children and Youth Panel Study 2012. Secondary questionnaire data on parental abuse and neglect, self-esteem, and school life adjustment are used for this study. Data were analyzed using descriptive analysis, Cronbach's a, Pearson's correlation analysis and multiple regression analysis. Baron and Kenny's method determined the mediation effect. SPSS ver 18.0 was adopted. The results were as follows. First, parental abuse and neglect were negatively correlated with the adolescent school life adjustment; however self-esteem was positively correlated with adolescent school life adjustment. Second, the results of the regression analysis revealed that adolescent school life adjustment was influenced both directly and indirectly; parental abuse had a direct effect on adolescents' school life adjustment and also had an indirect effect on mediated by self-esteem. Parental neglect had a direct effect on adolescent school life adjustment and had an indirect effect on adolescent school life adjustment mediated by self-esteem. The results indicated that self-esteem plays a crucial variable in the relationship of parental abuse and the school life adjustment. Also, self-esteem plays a crucial variable in the relationship between parental neglect and school life adjustment.

• Journal of the Korean Society of Costume
• /
• v.52 no.4
• /
• pp.141-154
• /
• 2002

The purpose of this study was to define 'sponsorship' as a kind of advertising tool, and to describe its effects on consumer brand attitude and actual purchase behavior. From previous research results, clothing sponsorship was defined as 'indirect advertisement', which has common ad traits as well as the uncommon ad traits, such as indirectness, emotional affinity, and symbolism. Results from empirical research using 1,227 data collected in Seoul and Kyounggi Areas were as follows ; (1) Television drama clothing sponsorship was proved to have effects on brand image, emotional & rational brand attitudes, decision making process, and actual purchase behavior. (2) Each of drama clothing sponsorship factors, such as 'drama', 'role', and 'actress', had different effects on brand memory and attitudes. (3) Consumer decision making process initiated by drama clothing sponsorship followed two different processes, which were called 'rational' and 'heuristic'. The rational process followed every steps of EKB model, which explained consumer's rational shopping, but heuristic model was closer to emotional and impulsive shopping.

• 제어로봇시스템학회:학술대회논문집
• /
• 1996.10b
• /
• pp.1056-1059
• /
• 1996

In this paper, we analyzed the effect of the change of the rotor time constant on the performance of the indirect vector control system. By employing indirect field orientation technique, we have also suggested an optimal control algorithm that allows an induction motor to maintain the maximum torque under the changing environment of rotor time constant. A computer simulation on the transient response of the output torque was demonstrated. To verify the validity of the method that has been proposed in this paper, an experiment has been performed utilizing TMS32OC31(40MHz) DSP chip which is capable of performing floating-point arithmetic in real time.

• Korean Journal of Air-Conditioning and Refrigeration Engineering
• /
• v.11 no.3
• /
• pp.321-331
• /
• 1999

A numerical study is carried out for increasing heat removal using indirect cooling system. Computation is performed for nine cases as variation of flow condition in the lower channel. As the result of this study, water is more effective than air at the same pressure loss in spite of the lower inlet velocity. In channel configuration, the vertical channel is more effective than horizontal channel because of the buoyancy effect. Under the condition that heat generation is the same, counter flow effectively decreases the temperature difference among blocks. Parallel flow is more effective than counter flow when average temperature of all blocks is considered. In the case of installing obstacles in the lower channel, it is desirable to install obstacles in the bottom of lower channel. Heat transfer rate increases as the height of obstacles increases.

• PNF and Movement
• /
• v.9 no.2
• /
• pp.39-44
• /
• 2011

Purpose : This study was aimed to examine the Influence of PNF indirect treatment for frozen shoulder patient Methods : Frozen shoulder patient was measured range of motion test of shoulder joint, visual analog scale(VAS) for pain and clean up the mirror activity at pre intervention and post-intervention in 2 weeks. Results : The ROM, activities of shoulder were increased and decreased VAS point for pain after treatments. Conclusion : We found that PNF indirect treatment could improve ROM and functions of shoulder and pain for frozen shoulder patient.

• Journal of the Earthquake Engineering Society of Korea
• /
• v.24 no.1
• /
• pp.29-37
• /
• 2020

This study is to investigate the effect of a retrofitted reinforced concrete frame with non-seismic details strengthened by embedded steel moment frames with an indirect joint, which mitigates the problems of the direct joint method. First, full-scale experiments were conducted to confirm the structural behavior of a 2-story reinforced concrete frame with non-seismic details and strengthened by a steel moment frame with an indirect joint. The reinforced concrete frame with non-seismic details showed a maximum strength of 185 kN at an overall drift ratio of 1.75%. The flexural-shear failure of columns was governed, and shear cracks were concentrated at the beam-column joints. The reinforced concrete frame strengthened by the embedded steel moment frames achieved a maximum strength of 701 kN at an overall drift ratio of 1.5% so that the maximum strength was about 3.8 times that of the specimen with non-seismic details. The failure pattern of the retrofitted specimen was the loss of bond strength between the concrete and the rebars of the columns caused by a prying action of the bottom indirect joint because of lateral force. Furthermore, methods are proposed for calculation of the specified strength of the reinforced concrete frame with non-seismic details and strengthened by the steel moment frame with the indirect joint.

• Korean Journal of Air-Conditioning and Refrigeration Engineering
• /
• v.18 no.9
• /
• pp.714-721
• /
• 2006

In evaporative cooling applications, the evaporation water is supplied usually sufficiently larger than the amount evaporated to enlarge contact surface between the water and the air. Especially in indirect evaporative coolers, however, if the evaporation water flow rate is excessively large, the evaporative cooling effect is not used for heat absorption from the hot fluid but spent to the sensible cooling of the evaporation water itself. This would result in a decrease in the cooling performance of the indirect evaporative cooler. In this study, the effects of the evaporation water flow rate on the cooling performance are investigated theoretically. The cooling process in an indirect evaporative cooler is modeled into a set of linear differential equations and solved to obtain the exact solutions to the temperatures of the hot fluid, the moist air, and the evaporation water. Based on the exact solutions, it is analyzed how much the cooling performance is affected by the evaporation water flow rate. The results show that the decrease in the cooling effectiveness is substantial even for a small flow rate of the evaporation water and the relative decrease is more serious for a high-performance evaporative cooler.

• Asian-Australasian Journal of Animal Sciences
• /
• v.17 no.8
• /
• pp.1039-1046
• /
• 2004

A model Indigenous Thai beef cattle breeding structure consisting of nucleus, multiplier and commercial units was used to evaluate the effect of changes in heritabilities of and genetic correlations between adaptation traits on genetic gain and profitability. A breeding objective that incorporated adaptation was considered. Two scenarios for improving both the production and the adaptation of animals where also compared in terms of their genetic and economic efficiency. A base scenario was modelled where selection is for production traits and adaptation is assumed to be under the forces of natural selection. The second scenario (+Adaptation) included all the information available for base scenario with the addition of indirect measures of adaptation. These measures included tick count (TICK), faecal egg count (FEC) and rectal temperature (RECT). Therefore, the main difference between these scenarios was seen in the records available for use as selection criteria and hence the level of investments. Additional genetic gain and profitability was generated through incorporating indirect measures of adaptation as criteria measured in the breeding program. Unsurprisingly, the results were sensitive to the changes in heritabilities and genetic correlations between adaptation traits. However, there were more changes in the genetic gain and profitability of the breeding program when the genetic correlations of adaptation and its indirect measures were varied than when the correlations between these measures were. The changes in the magnitudes of the genetic gain and profit per cow stresses the importance of using reliable estimates of these traits in any breeding program.

• Proceedings of the Korean Society of Precision Engineering Conference
• /
• 2000.11a
• /
• pp.110-113
• /
• 2000

In general, speed control method of the elevator system has used motor pole change type or motor primary voltage control type. But it will change to vector control type in order to increase it's reliability, riding comfort and decrease material cost. It is the conception of vector control type in order to increase it's reliability, riding comfort and decrease material cost. It is the conception of vector control that primary current of the induction motor be controlled independently with magnetizing current(field current of DC motor) and torque current(armature current of DC motor). In this paper, by analyzing the effect of the time constant variation of rotor of the induction motor on the slip frequency type indirect vector control, a drive system for the motor will be constructed using a fuzzy slip frequency type indirect vector controller with fuzzy control method for estimating the vector time constant in the slip frequency type indirect vector control. The goal of this study is to enabling even more efficient speed control by constructing on elevator driver based on the newly developed drive system.