We developed an age-based spawner-recruit model incorporating environmental variables to forecast stock biomass and recruits of pelagic fish in this study. We applied the model to the Tsushima stock of jack mackerel, which is shared by Korea and Japan. The stock biomass of jack mackerel (Trachurus japonicus) around Korean waters ranged from 141 thousand metric tons (mt) and 728 thousand mt and recruits ranged from 27 thousand mt to 283 thousand mt. We hind-casted the stock biomass to evaluate the model performance and robustness for the period of 1987~2009. It was found that the model has been useful to forecast stock biomass and recruits for the period of the lifespan of fish species. The model is also capable of forecasting the long-term period, assuming a certain climatic regime.

The object of this research is to analyze and classify the preference on Korean traditional desserts by age groups. More women than men were observed to have a healthy diet. In addition, with regards to age, children and young people were founf to have a healthier diet than the median age. Women showed a preference for dessert more so than men. Both men and women showed to eat dessert when reminded, and the young, as well as middle-aged were found to eat dessert often. Korea sign a survey on the traditional dessert, like rice cake, were the preference for women, whereas men were fixated in soft drinks, fruit punch and Schisandra chinensis fruit punch with Rhododendron. Young people liked rice cakes, while the median age liked chajongryu hangwaryu. In soft drinks, fruit punch and watermelon Sikhye was preferred by two of the young, while the middle-aged preferred baesuk and Schisandra chinensis fruit punch.

The purpose of this study was to assess the consumption patterns of Makoli and to provide age-specific suggestions to increase the popularity of newly developed products. The subjects of the study were 373 men and 329 women, and information was obtained by self-administered questionnaire in December of 2010. One major finding of the study was that regardless of gender, consumption of Makoli was correlated to age: older respondents drank more Makoli. Those in their thirties and older, especially women, drank Makoli at home with family. The reasons given for liking or disliking Makoli differed among age groups, but were the same between genders. More subjects in their twenties liked Makoli because of its distinctive taste, while more in their forties liked it for its cultural value. Subjects in their thirties disliked it because it caused headaches, while more in their forties complained of burping. Both genders in their twenties suggested that TV and internet advertisements may be the best strategy to increase the popularity of newly developed Makoli products, and women in their forties suggested promoting Makoli’s health benefits. The low calorie content of new Makoli products appealed to women of all age groups and men in their twenties and thirties. Women in their forties were also attracted by Makoli’s possible effect to alleviate constipation.

칡한우는 한우의 품종의 하나로 FAO에 등록되어 있고, 1,700여두가 사육되고 있는 것으 로 추정하고 있다. 그러나 사육두수가 적어 멸종위험품종으로 분류되고 있고, 특히 번식 가 능한 수소의 숫자가 매우 적어 근친의 위험에 노출되어 있다. 칡소에 대한 연구는 유전적 특성(이 등, 2002), 정액동결(조 등, 2011), 모색분포(박 등, 2007) 등으로 아주 제한적으로 보고되고 있어서 증식에 필요한 정액 동결관련 연구가 필요할 것으로 생각된다. 따라서 본 연구에서는 칡한우 수소의 활용도를 높이기 위하여 생후 15개월령 단계에서 2-3일 간격으 로 2회 채취하여 동결한 후 거세·비육하여 도체성적을 평가하였다. 정액채취는 인공질(FHK, Japan), 동결희석제는 Triladyl(Minitube, Germany) 희석제를 이 용하였다. 정자의 motility는 CASA system(Minitube, Germany)상에서 Total motile (TM)과 Progressive motile (PM) 비율을 측정하였다. 15개월령 칡소와 30개월령 칡소의 신선 및 동결융해 정액의 활력을 조사한 결과, 15개월 령 수소의 정액량이 평균 2.3 ml이었고, 30개월 수소의 정액량은 평균 5.0 ml로서 유의하게 높았다(p<0.05). 채정 직후의 신선정자의 TM 비율이 15개월 및 30개월 수소가 각각 평균 93.7% 및 88.3%, PM 비율은 각각 97.0% 및 88.3%로서 PM 비율은 15개월령이 유의하게 높았다(p<0.05). 한편 동결융해 정자의 TM 비율은 각각 평균 56.0% 및 58.0%였고, PM 비 율은 각각 평균 64.0% 및 70.7%로서 차이가 없었다. 칡소 15개월 정액채취가 완료된 후 거세 및 비육하여 출하한 결과와 한우 거세우의 도축 성적을 비교한 결과, 육량은 A등급이 칡한우는 35.7%, 한우는 27.5%였고, B등급은 각각 42.9% 및 52.75였다. 육질등급은 1++등급이 각각 35.7% 및 15.0%, 1+등급이 각각 35.7% 및 30.8%, 1등급은 각각 14.3% 및 32.0% 그리고 2등급이 각각 14.3% 및 20.1%였다. 본 연구를 통하여 칡한우 수소 생후 15개월령에서 정액채취, 동결 및 활용이 가능한 것 으로 판단되며, 향후 칡한우 고유 유전자원의 확보 및 증식에 활용도가 높을 것으로 기대된 다.

The purpose of this study was to examine the effect of growing stages of the Korean Native Striped Bull (KNSB) on the freezability and fertility of frozen-thawed semen. First, we investigated the total motility (TM) and progressive motility (PM) according to the diluent used for semen freezing. Second, we examined the effect of the age of KNSB on semen volume, TM and PM of fresh and frozen-thawed semen. Third, we examined the effect of frozen semen from the different age of KNSB on the fertilization rate, and the artificial insemination pregnancy rate. The diluents used in this experiment were Triladyl and Tris-egg yolk extender (EYE). Semen was collected from 5 KNSB in the growing stage (15 months) and 5 adult KNSB (36 months). When Triladyl or Tris-EYE extender was used for semen freezing, there was no difference of the mean TM and the mean PM. However, the mean TM was significantly higher in Bull No. 1885 than Bull No. 4283 ( <0.05). The mean volume of semen collected from the 15-month-old bulls (2.3 ml) was significantly lower ( <0.05) than that from the 36-month-old bulls (5.0 ml). The mean semen concentration was similar for the 15-month-old ( spermatozoa/ml) and 36-month-old ( spermatozoa/ml) bulls. For the 15-month-old and 36-month-old bulls, the mean TM of fresh semen were 93.7% and 88.3%, respectively, and the mean PM were 97.0% and 88.3%, respectively; the 15-month-old bulls showed a particularly high PM ( <0.05). For the 15-month-old and 36-month-old bulls, the mean TM (56.0% and 58.0%, respectively) and the mean PM (64.0% and 70.7%, respectively) of frozen-thawed semen did not differ. The development rates of embryos after fertilization and the pregnancy rate after artificial insemination using frozen-thawed semen did not differ according to the bull's age. In summary, semen volume differed according to the bull's age, but semen concentration and survival rate, the fertilization rate, and the pregnancy rate did not differ according to the stripe bull's age. Accordingly, semen from bulls in the growing stage can be collected and frozen for the preservation and multiplication of rare livestock.

This study was conducted to examine the effect of oocyte donor age and micromanipulation medium on the development of mouse cloned embryos receiving cumulus cells. Mouse oocytes were obtained from 6 to 11 week-old mice BDF1 female mice(experiment 1) and cumulus cells were used as donor cells. Micromanipulation procedures for nuclear transfer(NT) were performed in FHM, M2 or Hepes-buffered TCM199(TCM199) medium(experiment 2). After nuclear transfer, the reconstructed oocytes were activated by 10 mM SrCl2 in Ca-free CZB medium in the presence of 5 μg/ml cytochalasin B for 5 h and cultured in KSOM medium for 4 days. In experiment 1, the survival rate of oocytes after injection of cumulus cells were significantly(p<0.05) lower in oocytes from 6～7 week-old mice(53.3%) than in oocytes from 8～9(80.9%) and 10～11 week-old mice(77.1%). In experiment 2, the survival rate of oocytes after cell injection were significantly(p<0.05) higher in FHM and M2 medium(71.7% and 76.9%) than in TCM199 medium (51.2%). The activation rates of cloned embryos were not different among the micromanipulation media. However, the embryos developed to blastocyst stage were significantly(p<0.05) higher in FHM medium(13.9%) than in M2 and TCM199 medium(0.0% and 0.0%). In conclusion, the present study suggest that oocytes from above 8 week-old mice are superior to oocytes from 6～7 week-old mice as a source of recipient cytoplasm and FHM is superior to M2 and TCM199 as a micromanipulation medium for mouse somatic cell cloning.

A survey of consumer awareness and attitudes was conducted about genetically modified (GM) foods and the labeling regulations. The questionnaires were distributed to 4,620 consumers who lived in a variety of areas in Korea, and 4,076 people responded. The consumers were asked about knowledge, labeling information, and the source of obtaining information about GM foods. More than 11.5% of the consumers had never heard about GM foods and 86.9% of consumers had less than a normal level of knowledge about GM foods. No statistically significant relationship was found between genders, but the teachers group had moderate knowledge (p<0.001). In total, 28.4% of consumers did not know the GMO labeling regulations. They answered that the reason to buy GM food was do not know>nothing wrong>create benefit>think as safe>inexpensive. The answers to the question of what was the first benefit were: solve food shortage>functional and nutritious food>cultivate in bad condition>nothing>various cultivars. They answered that the worst factor was the next generation effect>environmental disruption. Regarding the development of GM food in Korea, males answered do not know>stronglyrecommend>defer>strongly suppress. Female answered: don't know>defer>strongly recommend>strongly suppress. More than half of the respondents did not have much information about GM foods; 88.3% of respondents answered they did not have educational experience about GM food.

The purpose of this study was to examine the structural relationships among the benefit sought, satisfaction, and loyalty of green tea consumers, including the moderating effect of age. Data were collected from 658 residents of Seoul and Gyeonggi-do Province who were 20-years-old and older and who had purchased green tea. The SPSS 15.0 and LISREL 8.80 statistical package were used for the analysis, and frequency, reliability, an exploratory factor analysis, a confirmatory factor analysis, and a path analysis were conducted. The results showed that the health benefit and enjoyment among benefit sought had a positive effect on satisfaction. Satisfaction of green tea consumers had a positive effect on loyalty. The analysis indicated that age moderated the relationship among benefit sought, satisfaction, and loyalty. The results could enable green tea marketers to develop marketing techniques that could expand green tea consumption.

The age and growth of flathead grey mullet, Mugil cephalus, were studied using samples collected from the coastal water of Yeosu from September 2009 to August 2010. Spawning season estimated from the gonadosometic index (GSI) was from November to January. A method for increasing the readability of the otolith was described and criteria for the interpretation of otolith was provided. The annual ring was formed in September once a year. Annual ring in otolith for flathead grey mullet is validated for fish aged 1-8 using the marginal increment analysis. Using the sectioned otolith, between reader precision was 84%. Also, Within-reader agreement for sectioned otolith age readings was higher (reader 1=84%, reader 2=87%). The relationship between fork length and total weight was TW=0.022FL2.818. The estimated von Bertalanffy growth parameters for the flathead grey mullet were L∞=67.97cm K=0.164/year and to=-0.81year.

과학 수업에 과학사를 도입하자는 주장은 과학 지식과 과학적 방법의 이해, 과학의 본성에 대한 고찰, 과학과 사회와의 상호작용의 이해 등의 필요성에 따라 지속적으로 강조되어 왔다. 통합 과학 교육의 중요성이 강조되고 있는 오늘날, 과학사는 통합 과학 교육의 방안으로도 효과적이다. 이러한 배경 속에서 본 연구에서는 과학사를 과학 교육에 활용한 연구들을 분석하고 이를 토대로 통합 과학 주제로서 과학사를 활용할 수 있는 내용을 선정해 과학사 수업을 개발했다. 본 연구에서는 통합 과학의 주제로서의 과학사 수업의 개발을 위해 '지구의 연령'을 주제로 선정했다. 중 고등학생들을 대상으로 한 시범 적용 결과, 학생들은 수업을 긍정적으로 평가했다.

In this paper, the author devised new decision recommendation ordering method of items attributed by age to improve accuracy of recommender system. In conventional recommendation system, recommendation order is decided by high order of preference prediction. However, in this paper, recommendation accuracy is improved by decision recommendation order method that reflect age attribute of target customer and neighborhood in preference prediction. By applying decision recommendation order method to recommender system, recommendation accuracy is improved more than conventional ordering method of recommendation.

본 논문에서는 저연령층 어린이들의 뇌 운동중추에 대한 효과적인 훈련방법으로 악력계 제어 시스템을 이용한 게임을 개발하였다. 키보드나 마우스와 같은 기존의 인터페이스 방식과는 달리 악력계를 사용하여 측정되는 악력수치에 의해 게임을 플레이하는 것으로, 악력의 등척성, 등장성 훈련을 할 수 있게 하였다. 또 단순히 반복적인 악력훈련으로 인한 피로감이나 훈련에 대한 흥미가 떨어지는 것을 4가지 미니게임과 교육적인 콘텐츠를 제공함으로써 체계적인 악력 훈련 및 교육적인 기능성 게임에 대한 새로운 모델을 제시하였다

The purposes of this study are to segment women consumers on the basis of clothing shopping orientation and to investigate clothing purchasing behaviors of each segmented group by age variable for development of effective fashion marketing strategies to meet very changeable modern consumers' needs. The research methodology is survey and subjects were 650 women aged from 20s to 60s. The questionnaire consist of measurement items for clothing shopping orientation, clothing purchasing behaviors and subjects' demographic attributions. The data were analyzed by Cronbach's α, factor analysis, cluster analysis, χ2 test, ANOVA and Duncan's multiple range test, using SPSS program. The results are as follows. First, 5 factors were emerged on clothing shopping orientation. Second, women consumers are segmented into 4 types(conspicuous, convenient, pleasurable, and unconcerned type) by clothing shopping orientation. Third, each consumer type divided by age variable showed some important differences on demographic characteristics and various clothing purchasing behaviors. Therefore, the results of this study support that clothing shopping orientation can be useful as one of the effective differentiated variables to segment women consumer market and age variable has important mediate effects on the differences of clothing purchasing behaviors by clothing shopping orientation type.

Studying awareness, importance, satisfaction, and wearing behavior of functional textiles for active silver generation related with gender and age is expected to contribute to clothing products development to improve and maintain their health and marketing strategy fit for user characteristics. For empirical research, a survey was developed and the aged 50 and above were 332 respondents. The results of the study are as follows. First, silver generation considered all the clothing comfort sensations important when wearing clothes, such as tactile sensation, clothing pressure sensation, thermal/wet sensation, and motion sensation in human physiological aspect. Also, stretchy fabrics were ranked first in awareness, the number of wearing times, and satisfaction of comfort functional fabrics. More than 30% of silver generation have fifteen items out of 36 functional clothes. Second, in analysis of awareness by gender on functional clothing products, women were more aware of health/safety-oriented fabrics than men were. Otherwise, men had more knowledge about the water-related properties of functional fabrics than women have, such as water/moisture absorptive and water-repellent/vapor permeable fabrics. While women have more indoor casual wear, men had more active sportswear. Also, women expressed a strong preference to the stretchy function of fabrics.

The purpose of this study was to analyze the dietary habits and food intake by age, based on the nutrition counseling data of medical health examination. The subjects were 5, 511 adults(3, 139 males and 2, 372 females) who took comprehensive medical test in Gyeonggi area, and they were evaluated from January 1, 2007 to December 31, 2007. Survey samples were divided by age groups: 30>, 30~39, 40~49, 50~59, 60~69, 70≤ years. The subjects were composed of 57% male and 43% female. The results showed that the dietary habits of ≥50 group were relatively good. On the other hand, in 30> yrs group had more dietary habit problems, they had irregular meals and the ratio of skipping breakfast was high. And they frequently had meals out. regularity of meals, eating breakfast was higher in ≥70 yrs groups than in other groups(p<0.001). frequency of overeating was higher in 30>, 30~39≥yrs groups than in other groups(p<0.001) and speed of eating meal were fast in 50~59 yrs groups than in other groups(p<0.01). For foods with high cholesterol and fat, it was shown that the older the subject, the fewer the frequency of consumption(p<0.001). For kimchi and salty foods, food intake showed a negative relationship with age(p<0.001), whereas for fresh vegetables and high-calcium fish, it showed a positive relationship(p<0.001). All in all, it was shown that as the people get older, their dietary habits tend to get more appropriate. In conclusion nutrition education based on their dietary habit by age should be taught, so that people have a healthy dietary habit and food intake for the rest of their life.

Characteristics of age and growth of the black rockfish, Sebastes inermis sampled in the Jeonnam Marine Ranching Area (JMRA) around Geumo Islands south of Yeosu were investigated using 642 otoliths from March 2009 to February 2010. The opaque zone was formed in September once a year and hence it was used as an annulus. The parturient period was December to January, and therefore the duration from fertilization to the complete formation of the opaque zone was nineteen months. From the parameters calculated using the average length when the year ring was formed, growth of S. inermis were expressed by von Bertalanffy growth equation as Lt=23.267 (1-e-0.4406(t+1.1971)) for females and Lt=22.030 (1-e-0.5312(t+0.6834)) for males when is total length in age t. Through the growth equations, the maximum length was determined as 23.27cm for females and 22.03cm for males and the growth factor as 0.4406/yr and 0.5312/yr, respectively. Finally, the growth of female S. inermis is larger than the one of male S. inermis.

This study was performed to investigate the characteristics within ages and freezing tolerance of spermatozoa in Jindo Dog. Experimental animals were selected 12 herds within 1～8 year’s old and collected semen for 2 times in a week. Collected semen was evaluated whole volume and sperm number with CASA system (SIAS, Medical Supply, Korea). Then seminal plasma were separated and diluted with modified Tris-egg yolk extender and added 4, 6 and 8% glycerol for 4 times to final concentration and equilibrated for 1.5 hrs. Before and after freezing, equilibrated semen were evaluated the survival rates. Total volume of sperm at 1～2 year old group is as 5.2×108 cells/ ml largest and there were no significance among groups. The motility of 1～2 year old group is highest as 90.9% and there were significance among groups. Abnormal sperm showed similar among groups. The survival rate in terms of pre-freezing and post-freezing were decreased all levels of glycerol and reveled 87.0% to 64.5% in 4%, 87.5% to 51.9% in 6% and 73.4% to 29.7% in 8%, there were significant difference among the groups (p<0.05). These results suggest that the optimal sperm-freezing methods in Jindo Dog are utilized with modified Tris egg-yolk extender with 4% glycerol and were improve the reproductive activity by these methods.

목적: 초등학생의 수평사위 검사를 실시하여 연령증가에 따른 상관성을 분석하였다. 방법: 경남 소재 초등학교 4곳의 166명을 대상으로 나안시력과 굴절검사 및 안위검사를 실시하여 비교 분석하였다. 결과: 연령별 원거리 사위 분포는 전체 대상자 중 외사위 92명(55.4%), 내사위 39명(23.5%), 정위 35명(21.1%)이었다(f=32.259, p=0.000). 외사위와 내사위 및 정위의 연령별 분포는 각각 8세는 14명(41.2%), 11명(32.4%), 9명(26.5%)(f=13.857, p=0.000), 9세는 21명(55.3%), 8명(21.1%), 9명(23.7%)(f=16.955, p=0.000), 12세는 36명(62.1%), 13명(22.4%), 9명(1.7%)(f=8.924 p=0.000), 13세는 21명(58.3%), 7명 (19.4%), 8명(22.2%)(f=8.371, p=0.001)으로 나타났다. 연령별 근거리 사위 분포는 전체 대상자 중 외사위 107명(64.5%), 내사위 38명(22.9%), 정위 21명(12.7%) 이었다(f=33.138, p=0.000). 외사위와 내사위 및 정위의 연령별 분포는 각각 8세는 21명(61.8%), 9명 (26.5%), 4명(11.76%), 9세는 24명(63.2%), 8명(21.1%), 6명(15.8%), 12세는 36명(62.1%), 17명(29.3%), 5명 (8.6%), 13세는 26명(72.2%), 4명(11.1%), 6명(16.7%)으로 나타났다. 연령증가에 따른 상관성에서는 원거리에서는 8세와 9세간에는 r=0.303, p=0.081, 9세와 12세간에는 r=0.217, p=0.190, 12세와 13세간에는 r=-0.304, p=0.0844로 유의성이 없었으며, 근거리에서는 8세와 9세간에는 r=0.710, p