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Regulatory Mechanism of Vascular Contractility by Extracellular $\textrm{K}^{+}$: Effect on Endothelium-Dependent Relaxation and Vascular Smooth Muscle Contractility (세포 외 $\textrm{K}^{+}$의한 혈관 수축신 조절 기전: 혈관평활근 수축성과 내피세포 의존성 이완에 미치는 영향)

  • 유지영;설근희;서석효;안재호
    • Journal of Chest Surgery
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    • v.37 no.3
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    • pp.210-219
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    • 2004
  • Extracellular $K^{+}$ concentration ([ $K^{+}$]$_{0}$ ) can be increased within several mM by the efflux of intracellular $K^{+}$. To investigate the effect of an increase in [ $K^{+}$]$_{0}$ on vascular contractility, we attempted to examine whether extracellular $K^{+}$ might modulate vascular contractility, endothelium-dependent relaxation (EDR) and intracellular $Ca^2$$^{+}$ concentration ([C $a^2$$^{+}$]$_{i}$ ) in endothelial cells (EC). We observed isometric contractions in rabbit carotid, superior mesenteric, basilar arteries and movse aorta. [C $a^2$$^{+}$]$_{i}$ was recorded by microfluorimeter using Fura-2/AM in EC. No change in contractility was recorded by the increase in [ $K^{+}$]$_{0}$ from 6 to 12 mM in conduit artery such as rabbit carotid artery. whereas resistant vessels, such as basilar and branches of superior mesenteric arteries (SMA), were relaxed by the increase. In basilar artery, the relaxation by the increase in [ $K^{+}$]$_{0}$ to from 1 to 3 mM was bigger than that by the increase from 6 to 12 mM. In contrast, in branches of SMA, the relaxation by the increase in [ $K^{+}$]$_{0}$ to from 6 to 12 mM is bigger than that by the increase from 1 to 3 mM. $Ba^2$$^{+}$ (30 $\mu$M) did not inhibit the relaxation by the increase in [ $K^{+}$]$_{0}$ from 1 to 3 mM but did inhibit the relaxation by the increase from 6 to 12 mM. In the mouse aorta without the endothelium or treated with $N^{G}$_nitro-L-arginine (30 $\mu$M), nitric oxide synthesis blocker, the increase in [ $K^{+}$]$_{0}$ from 6 to 12 mM did not change the magnitude of contraction induced either norepinephrine or prostaglandin $F_2$$_{\alpha}$. The increase in [ $K^{+}$]$_{0}$ up to 12 mM did not induce contraction of mouse aorta but the increase more than 12 mM induced contraction. In the mouse aorta, EDR was completely inhibited on increasing [ $K^{+}$]$_{0}$ from 6 to 12 mM. In cultured mouse aorta EC, [C $a^2$$^{+}$]$_{i}$ , was increased by acetylcholine or ATP application and the increased [C $a^2$$^{+}$]$_{i}$ , was reduced by the increase in [ $K^{+}$]$_{0}$ reversibly and concentration-dependently. In human umbilical vein EC, similar effect of extracellular $K^{+}$ was observed. Ouabain, a N $a^{+}$ - $K^{+}$ pump blocker, and N $i^2$$^{+}$, a N $a^{+}$ - $Ca^2$$^{+}$ exchanger blocker, reversed the inhibitory effect of extracellular $K^{+}$. In resistant arteries, the increase in [ $K^{+}$]$_{0}$ relaxes vascular smooth muscle and the underlying mechanisms differ according to the kinds of the arteries; $Ba^2$$^{+}$-insensitive mechanism in basilar artery and $Ba^2$$^{+}$ -sensitive one in branches of SMA. It also inhibits [C $a^2$$^{+}$]$_{i}$ , increase in EC and thereby EDR. The initial mechanism of the inhibition may be due to the activation of N $a^{+}$ - $K^{+}$pump. activation of N $a^{+}$ - $K^{+}$pump.p.p.p.

Effects of On-farm Management System on the Carcass Quality of Market Pigs (양돈장 관리시스템이 출하돈의 도체품질에 미치는 영향)

  • Kim, D.H.;Seo, J.T.
    • Journal of Animal Environmental Science
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    • v.15 no.1
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    • pp.37-50
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    • 2009
  • The purpose of this study was to investigate the effects of on-farm management systems(including the farm size, stocking density of growing-finishing phase, proportion of finisher diet and type of growing-finishing building) and pre-slaughter handling(including the transportation time and loading time) on carcass grade, the incidence of PSE pork, the meat quality score for intra-muscle fat, inter-muscle fat, subcutaneous fat and score for elasticity of market pigs. For this study, 248,787 pigs of 53 different farms were used to establish the pork quality assurance program and to meet the comsumer's need. The results are summarized as follows. 1. The farm size had significant influence on carcass grade, in which showing the higher grade by increasing the farm size. However, the incidence of PSE pork were not significantly differences among the farm size. The meat quality score for intra-muscle fat, inter-muscle fat, subcutaneous fat and score for elasticity of market pigs were not significant influenced by farm size. 2. The stocking density of growing-finishing phase was statistically significant for carcass grade, in which showing the higher grade in mid density group. However, the incidence of PSE pork was higher in high density group. The meat quality score for intra-muscle fat, inter-muscle fat and elasticity of market pigs were greater in mid density groups, but not influenced by stocking density for subcutaneous fat score. 3. The carcass grade and the incidence of PSE pork were not significantly influenced by transportation time. However, transportation time significantly affected the meat quality score, the meat quality score for intra-muscle fat, inter-muscle fat, subcutaneous fat and elasticity of the carcasses were superior in more than 1 hour transportation groups. 4. At any time loading, the carcass grade and PSE incidence were not significantly differences. However, the meat quality score for intra-muscle fat, inter-muscle fat and elasticity of market pigs were superior in before 10 AM groups, but not influenced by loading time for subcutaneous fat score. 5. The proportion of finisher diet had not significant influence on carcass grade, but PSE incidence affected by proportion of finisher diet, 21 percent or more group was higher PSE incidence. The meat quality score for intra-muscle fat and inter-muscle fat of the carcasses were superior in 21 percent or more fed finisher diet groups, but elasticity score of carcass had not influenced by the proportion of finisher diet. 6. The type of growing-finishing building was affected the carcass grade and PSE incidence of the market pigs, carcass grade and PSE incidence were superior in enclosed mechanical ventilation building groups. The meat quality score for intra-muscle fat and inter-muscle fat of the carcasses were not significantly differences by the type of finishing building, but the score of subcutaneous fat and elasticity of carcass were superior in opened natural ventilation building groups. In conclusion, the results of this study suggest that we have more precise on-farm management practice and the knowledge related to pre-slaughter handling skills to reduce the stress and improve the status of welfare of market pigs.

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A Study on Maternity Aids Utilization in the Maternal and Child Health and Family Planning (농촌(農村)에 있어서 분만개조요원(分娩介助要員)의 봉사(奉仕)에 의(依)한 모자보건(母子保健)rhk 가족계획(家族計劃)에 관(關) 연구(硏究))

  • Yeh, Min-Hae;Lee, Sung Kwan
    • Journal of Preventive Medicine and Public Health
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    • v.5 no.1
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    • pp.57-95
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    • 1972
  • This study was conducted to assess the effectiveness of service by maternity aids concerning maternal and child health in improving simultaneously infant mortality, contraception and vital registration among expectant mothers in rural Korea, where there is less apportunity for maternal and child health care. It is unrealistic to expect to solve this problem in rural Korea through professional persons considering the situation of medical facilities and the socioeconomic condition of residents. So, we intended to adopt a system of services by maternity aids who were educated formally among indigenous women. After the women were trained in maternal and child health, contraception, and registration for a short period, they were assigned as a maternity aids to each village to help with various activities concerning maternal and child health, for example, registration of pregnant women, home visiting to check for complications, supplying of delivery kits, attendance at delivery, persuasion of contraception, and invitation for registration and so on. Mean-while, four researchers called on the maternity aids to collect materials concerning vital events, maternal child health, contraception and registration, and to give further instruction and supervision as the program proceeded. A. Changes of women's attitude by services of maternity aid. Now, we examined to what extent' such a service system to expectant mothers affected a change in attitude of women residing in the study area as compared to women of the control area. 1) In the birth and death places, there were no changes between last and present infants, in study or control area. 2) In regard to attendants at delivery, there were no changes except for a small percentage of attendance (8%) by maternity aid in study area. But, I expect that more maternity sids could be used as attendants at delivery if they would be trained further and if there was more explanation to the residents about such a service. 3) Considering the rate of utilization of sterilized delivery kit, I am sure that more than 90 percent would be used if the delivery kit were supplied in the proper time. There were significant differences in rates between the study and the control areas. 4) Taking into consideration the utilization rate of the clinic for prenatal care and well baby care, if suck facilities were installed, it would probably be well utilized. 5) In the contraception, the rate of approval was as high as 89 percent in study area as compared to 82 percent in the control area. 6) Considering the rate of pre-and post-partum acceptance on contraception were as much as 70 percent or more, if motivation to use contraception was given to them adequately, the government could reach the goals for family planning as planned. 7) In the vital registration, the rate of birth registration in the study area was some what improved compared to that of the control area, while the rate of death registration was not changed at all. Taking into account the fact that the rate of confirmation of vital events by maternity aids was remarkably high, if the registration system changed to a 'notification' system instead of formal registration ststem, it would be improved significantly compared to present system. B. Effect of the project Thus, with changes in the residents' attitude, was there a reduction in the infant death rate? 1) It is very difficult problem to compare the mortality of infants between last and present infants, because many women don't want to answer accurately about their dead children especially the infants that died within a few days after birth. In this study the data of present death comes from the maternity aides who followed up every pregnancy they had recorded to see what had happened. They seem to have very reliable information on what happened in first few weeks with follow up visitits to check out later changes. From these calculaton, when we compared the rate of infant death between last and present infant, there was remarkable reduction of death rate for present infant compare to that of last children, namely, the former was 30, while the latter 42. The figure is the lowest rate that I have ever heard. As the quality of data we could assess by comparing the causes of death. In the current death rate by communicable disease was much lower compare to the last child especially, tetanus cases and pneumonia. 2) Next, how many respondents used contraception after birth because of frequent contact with the maternity aid. In the registered cases, the respondents showed a tendency to practice contraception at an earlier age and with a small number of children. In a comparison of the rate of contraception between the study and the control area, the rate in the former was significantly higher than that of the latter. What is more, the proportion favoring smaller numbers of children and younger women rose in the study area as compared to the control area. 3) Regarding vital registration, though the rate of registration was gradually improved by efforts of maternity aid, it would be better to change the registration system. 4) In the crude birth rate, the rate in the study area was 22.2 while in the control area was 26.5. Natural increase rate showed 15.4 in the study area, while control area was 19.1. 5) In assessment of the efficiency of the maternity aids judging by the cost-effect viewpoint, the workers in the Medium area seemed to be more efficiency than those of other areas.

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Permission of the Claim that Prohibits Military Aircraft Operation Nearby Residential Area - Supreme Court of Japan, Judgement Heisei 27th (Gyo hi) 512, 513, decided on Dec. 8, 2016 - (군사기지 인근주민의 군용기 비행금지 청구의 허용 여부 - 최고재(最高裁) 2016. 12. 8. 선고 평성(平成) 27년(행(行ヒ)) 제512, 513호 판결 -)

  • Kwon, Chang-Young
    • The Korean Journal of Air & Space Law and Policy
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    • v.33 no.1
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    • pp.45-79
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    • 2018
  • An increase of airplanes and military aircraft operation lead to significant demanding of residential claims by people who live in nearby airports and military bases due to noise, vibration and residential damages caused by aircraft operations. In recent years, a plaintiff has filed a lawsuit against the defendant, claiming the prohibition of using claimant's possessed land as a helicopter landing route, and the Daejeon High Court was in favour of the plaintiff. Although the Supreme Court later dismissed the Appeal Court decision, it is necessary to discuss the case of setting flight prohibited zone. In Japan, the airport noise lawsuits have been filed for a long time, mainly by environmental groups. Unlike the case that admitted residential damages caused by noise, the Yokohama District Court for the first time sentenced a judgment of the prohibition of the flight. This ruling was partially changed in the appellate court and some of the plaintiffs' claims were adopted. However, the Supreme Court of Japan finally rejected such decision from appeal and district courts. Atsugi Base is an army camp jointly used by the United States and Japan, and residents, live nearby, claim that they are suffering from mental damage such as physical abnormal, insomnia, and life disturbance because of the noise from airplane taking off and landing in the base. An administrative lawsuit was therefore preceded in the Yokohama District Court. The plaintiff requested the Japan Self-Defense Forces(hereinafter 'JSDF') and US military aircraft to be prohibited operating. The court firstly held the limitation of the flight operation from 10pm to 6am, except unavoidable circumstance. The case was appealed. The Supreme Court of Japan dismissed the original judgment on the flight claim of the JSDF aircraft, canceled the first judgment, and rejected the claims of the plaintiffs. The Supreme Court ruled that the exercise of the authority of the Minister of Defense is reasonable since the JSDF aircraft is operating public flight high zone. The court agreed that noise pollution is such an issue for the residents but there are countermeasures which can be taken by concerned parties. In Korea, the residents can sue against the United States or the Republic of Korea or the Ministry of National Defense for the prohibition of the aircraft operation. However, if they claim against US government regarding to the US military flight operation, the Korean court must issue a dismissal order as its jurisdiction exemption. According to the current case law, the Korean courts do not allow a claimant to appeal for the performance of obligation or an anonymous appeal against the Minister of National Defense for prohibiting flight of military aircraft. However, if the Administrative Appeals Act is amended and obligatory performance litigation is introduced, the claim to the Minister of National Defense can be permitted. In order to judge administrative case of the military aircraft operation, trade-off between interests of the residents and difficulties of the third parties should be measured in the court, if the Act is changed and such claims are granted. In this connection, the Minister of National Defense ought to prove and illuminate the profit from the military aircraft operation and it should be significantly greater than the benefits which neighboring residents will get from the prohibiting flight of military aircraft.

Festival Space Design to Change the Value of Sudokwon Landfill Site - 2014 Dreampark Chrysanthemum Festival Basic Plan and Design - (수도권 매립지 가치변화를 위한 지속 가능한 축제 공간 계획 - 2014 드림파크 국화축제 기본계획 및 기본설계 -)

  • Kim, Ok-Kyung;Lee, Hak-Youn;Kim, Joo-Am;Lee, Bo-Ram;Kim, Ha-Yan
    • Journal of the Korean Institute of Landscape Architecture
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    • v.42 no.4
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    • pp.89-99
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    • 2014
  • This paper offers a landscape design proposal for the 2014 Dreampark Chrysanthemum Festival within the Sudokwon Landfill Site. This site is located at 58 Baeksukdong, Seo-gu, Incheon, and it has an area of approximately $560,000m^2$. Over 1.53million visitors came to this festival on the previous year. This design includes an overall masterplan and a series of planting plans along with a core selection of iconic topiaries. The goal of the design is to create a landscape that improves the value of the place image and local economy as well as celebrates the 2014 Incheon Asian Game. In order to achieve this goal, three design subjects were considered: promoting local pride as a part of Incheon, increasing the aesthetic value of the site based on the brand image, and sustainable placemaking. To promote local pride, the 2km long "Little Incheon" is designed over a wildflower field, which is inspired by Incheon Bridge to give a strong image of the locality. A variety of programs from local gardening participation were introduced to the east part of the site. The design also outlines the vision for the development of Dreampark - a people-oriented gathering place for the entire community with spaces that offer a variety of unstructured recreational and cultural experiences. To increase the aesthetic brand value of the festival, it introduced a variety of wildflower beds scattering through the whole site. It creates a strong brand image for the festival and memories that will encourage visitors to return. Various folktales of Asian countries are displayed by autumn flowers and groundcover plants at the centre of the site, which is the highlight of the festival site. For sustainable placemaking, the design preserves the existing trees and reed beds for wildlife to create natural layers of landscape. In addition, facilities and service centers are designed to be flexible and are centred on the needs of the people using them. Also a festival management scheme was planned in order to operate the site efficiently and economically.

A Study on Bang-Yak-Hap-Py$\breve{u}$n (${\ll}$방약합편(方藥合編)${\gg}$에 대한 연구)

  • Kim, Hyung-Tae;Yoon, Chang-Yeul
    • Journal of Korean Medical classics
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    • v.5
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    • pp.151-199
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    • 1992
  • A study on Bang-Yak-Hap-Py$\breve{u}$n, one of the most widely-known Korean medicine books, has been conducted and the findings are as follows:the political and social background at the end of Yi-dynasty amidst the inflow of western civilization and the aggression of foreign forces can be seen as a historical period of trial, when civilization and independence had to be preserved at the same time, during the period, the social trend was to pursue a rapid practical solution rather than a profound theory. Responding to this trend, simple and easy medical science became to prevailand the representative medicine book of this kind was Bang-Yak-Hap-Py$\breve{u}$n. 1. Bang-Yak-Hap-Py$\breve{u}$n was written comprising the characteristics of simple and easy medical science with a view to popularizing-collection of logics, easy readability, medical science in time, etc. 2. Bang Yak-Hap-Py$\breve{u}$n, rich and grand in content, came out of Dong-$\breve{U}$i-Bo-Gam at the right moment as a pragmatic guide book of Korea medical practice symbolizing Korean spirit. 3. Do-yun Whang whose pen name was Hye-Am was born in Changwon, Kyungnam-do as the 18th descendant of Changwon Whang family. He engaged in medical practice in Seoul and wrote and edited Boo-Bang-Py$\breve{u}$n-Ram. $\breve{U}$i-Jong-Son-Ik, $\breve{U}$i-J$\breve{u}$ng-Son-Ik-Bu-Yeo, $\breve{U}$i-Bang-Whan-Tu, ect. and made his son, Pil-Su follow him and let him edit Bang-Yak-Hap-Py$\breve{u}$n, which put $\breve{U}$i-Bang-Whal-Tu and Son-Ik-Bon-Cho together. 4. The construct of Bang-Yak-Hap-Py$\breve{u}$n can be subdivied into three parts: herbs of 34 classes and 514 kinds were arranged on the upper part and $\breve{U}$i-Bang-Whal-Tu was arranged on the middle end lower part. Such arrangement can be very effective in clinics. 5. Bang-Yak-Hap-Py$\breve{u}$n as a curative book of Korean medical science has been a necessary another ego for many Korean medical practioners. It also played a great role of enhancing Korean oriental medical science to be widely used by Koreans. On the other hand, it produced a side effect of emergence of employed medical practioner who lacked in scholastic aptitude. 6. Tens or newly edited Bang-Yak-Hap-Py$\breve{u}$n have been issued. Among them, Jung-Jeong, Bang-Yak-Hap-py$\breve{u}$n, J$\breve{u}$ng-Mak-Bang-Yak-Hap-Py$\breve{u}$n. By$\breve{u}$n-J$\breve{u}$ng-Bang-Yak-Hap-Py$\breve{u}$n, and By$\breve{u}$n-J$\breve{u}$ng-Bang-Yak-Jung-Jeon have been widely known. Lately, Bang-Yak-Hap-Py$\breve{u}$n which includes more symptoms and remedies or is translated into Korean came out in several kinds. 7. The number of korea classical medicinal books quoted in Bang-Yak-Hap-Py$\breve{u}$n is 68, among which Dong-$\breve{U}$i-Bo-Gam Occupies the top in the list enlisting 69 medicinal treatment. This Shows that Dong-$\breve{U}$i-Bo-Gam gave birth to Bang-Yak-Hap-Py$\breve{u}$n.

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Effect of Boxing Aerobic Dance on Body Composition, Blood Component and Vascular Compliance in Obese Middle Aged Women (복싱에어로빅 참여가 비만 중년여성의 신체조성, 혈액성분 및 혈관탄성에 미치는 영향)

  • Zhang, Seok-Am;Kim, Seung-Suk
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.13 no.9
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    • pp.4009-4017
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    • 2012
  • This study was conducted to test the effects of participation in 12-week program of boxing aerobics by obese middle-aged women on their body composition, blood constituents, and vascular compliance The samples are the middle-aged women in their forties or more, who has 30% or more body fat percentage, but has no medical history in cardiovascular disorders or metabolic diseases. The samples are divided into 8 of exercising group, and 8 of control group by random assignment. The intensity of boxing aerobics was HRmax 50% for the initial 4 weeks, HRmax 60% for the 5th to 8th week, and HRmax 70% for the 9th to 12th week. Each session took 60 minutes. The result is as follows. First, as a result of participating in the boxing aerobics program, body weight, body fat percentage, and muscle showed significant differences depending on the measuring period and the interacting term of the group and measuring period(p<.001), and the result of t-test on the sample matched to each group's measuring time also showed the significant increase or decrease in the exercising group(p<.001). Second, as a result of participating in the boxing aerobics program, the exercising group's TC, TG, HDL-C, and LDL-C, all showed significant differences in accordance with each group, measuring time, and the interaction term between groups and measuring time(p<.01, p<.001), and the result of t-test on each group's samples matched to the measuring time also shows significant increase or decrease in the exercising group(p<.01). Third, as a result of participating in the boxing aerobics programs, the vascular compliance of right hand, left hand, right hand, and left hand showed significant differences in accordance with each group, measuring time, and the interacting term between the measuring time and the group(p<.001), the t-test results of the samples matched to the each group's measuring time also showed significant differences in the exercising group(p<.001). To summarize the results above, it is suggested that the 12-week boxing aerobics program can improve body composition, blood constituents, and the blood circulation, which may prevent or enhance relevant diseases such as cardiovascular disorders.

A Study on the Transformational Christian Education for Young Adults: With a Focus on the Employment of Jung's Unconscious Confrontation and Loder's Transformational Theory (청년기의 기독교 변형화교육에 관한 연구: 융의 무의식 대면과 로더의 변형이론을 중심으로)

  • Lee, Kyoomin;Kim, Eunjoo
    • Journal of Christian Education in Korea
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    • v.63
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    • pp.121-150
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    • 2020
  • The important developmental tasks of young adults are based on encounter and identity. These problems of encounter and identity are also connected to the instinct of longing for the "face" of primary caregivers, who acknowledge and affirm themselves as their cherished children. James Loder emphasizes that human "face pursuit instinct" later reaches "formal-operational stage" and leads to religious yearning for God as "the Eternal Face." This pursuit of "face" and "the Eternal Face" is an existential and ontological move to find out "Who am I?" through meaningful encounters. Religious psychologist Carl Jung also points out that scientific thinking has contributed to the liberation of humans from superstitious beliefs. But this has also led to the loss of the precious value of human spirit and the sense of unity with nature. Jung emphasizes that "symbolic play" should help learners and counseler face-to-face with their unconscious mind. By doing so, learners can overcome the wounds and scars of unconsciousness and mature toward the true self. James Loder is a scholar who critically introduced Jung's "unconscientious confrontation" therapy to his educational theory. Beyond Jung's unconsciousness and "symbolic play," Loder proposed transformational education for the learners to participate in meaningful changes through interaction between human spirit and the Holy Spirit. With many young adults wandering around in their existential voids, it is clear that functional and socializational education cannot overcome their problems and developmental crisis. This developmental crisis requires a foundation of identity and intimacy in the encounter with God, the "Eternal Face." Therefore, this study suggests that when Jung's "unconscious confrontation" and Loder's "transformation logic" are employed, transformational Christian education for the healthy self-identity and intimacy of young adults can be accomplished. This inquiry presents not only theoretical reflection, but also the reactions of young adults and actual feedback obtained through implementing transformational Christian education for young adults. Through all of these endeavors, this inquiry was completed by proving that "Transformational Christian Education for Young Adults" is an educational theory that can yield actual results and abound fruits. (This enquiry was undertaken by the support of the research fund of PUTS 2020.)

An Influence of the Source Information of Word Mouth on the Sales of Educational Service (구전의 정보원천이 교육서비스 판매에 미치는 영향)

  • Kang, Gye-Young;Song, In-Am;Hwang, Hee-Joong
    • Journal of Distribution Science
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    • v.9 no.2
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    • pp.73-81
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    • 2011
  • This study is designed to examine the effects of information source effects of the word mouth have on the formed expectations for the private institution and to explore the formed expectations' effects on the actual sales of the educational service. Moreover, its purpose is in analyzing what medication effects the pre-conceived expectation has on selecting the educational service. After testing hypothesis, the results showed that the source effects of the information from word of mouth had a significant effect on the expectation factors, in terms of expertise, similarity, likability and familiarity expectation factors. However, it was found that effect was not significant for the truthfulness. The significant result was found on the expectation factors before visiting the private institution on selecting educational service, indicating a positive effect. As for the influence of source of the word of mouth information on selecting educational service, the results from the mediation effects of the expectation factors on selecting the educational service showed that for expectation factors, expertise had the partial mediation effect, truthfulness, perfect mediating effect, similarity, partial mediation effect, likability, perfect mediating effect, and familiarity, perfect mediating effect. A test of the mediating role of attribute expectations in the influence of WOM message source attributes on educational services choices showed the following: 1) It was proven that attribute expectations played a partial mediating role in the influence of expertise and similarity, respectively, on educational services choices. 2) On the influence of trustworthiness, likability, and familiarity on educational services choices, respectively, attribute expectations had a full mediation effect. This research differs from the previous ones, which focused only on consumer satisfaction with educational services offered by private educational institutions in that it covers not only the influences of both WOM source attributes and key component factors of educational services on both educational services choices and satisfaction with such services but also the influence of WOM source attributes on attribute expectations prior to the first visit to a particular private educational institutions, and in turn the influence of such attribute expectations on educational services choices. Most particularly, the significance of this study lies in the fact that in an effort to more clearly explain the causal relationship between WOM source effects and educational services choices a test of the mediating role of attribute expectations was conducted. Although the research seems simple, some theoretical implications can be drawn as follows: WOM message source effects on educational services choices were positive and moreover these positive impacts are likely to be reinforced by means of the mediating variable of attribute expectations.

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Growth Characters and Their Seasonal Changes in Bupleurum falcatum L. Cultivars, 'Jeongsun' and 'Mishima' (재배종 시호의 생육특성 및 생육시기별 변화)

  • Kim, Kwan-Su;Chae, Young-Am;Lee, Bong-Ho
    • Korean Journal of Medicinal Crop Science
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    • v.8 no.3
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    • pp.234-242
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    • 2000
  • There are two cultivars, 'Jeongsun' and 'Mishima' of Bupleurum falcatum L., a medicinal plant, have been cultivated in Korea. Two cultivars were evaluated and compared in details for major growth characters and their seasonal changes. Jeongsun was higher in stem length and root weight per plant, and earlier in maturity than Mishima, while Mishima was higher in top weight per plant and the ratio of outer phloem layer(OPL) to whole root, and more in branch number. Coefficients of variations of most growth characters were higher in Mishima than in Jeongsun. In relationship between root and shoot growth characters, root weight, root diameter, etc. were positively correlated with stem thickness, top weight, branch number, etc. in both cultivars. In comparison of seasonal changes for growth characters between two cultivars, stem length and node number were almost not increased after September, but root length and branch number tended to increase until November. There were continuous increases of top and root weights in both cultivars after September. Increase rates of top and root weights were higher in Mishima and Jeongsun, respectively. The weight ratio of root part to whole plant in Jeongsun and the ratio of OPL to whole root in Mishima were higher during whole growth stages; especially Mishima showed their continuous increases after October. Jeongsun flowered earlier (August 17) than Mishima (September 16) by one month. Complete flowering date was on August 30 in Jeongsun and on September 30 in Mishima. Basic difference in plant growth between two cultivars was maturity, so shoot growth almost stopped after October in Jeongsun, and continued vegetative growth until November in Mishima with late flowering habit. These results indicate that higher root weight in Jeongsun is due to its earlier flowering character leading to relatively longer time for root growth, as compared with Mishima.

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