• Korean Journal of Environment and Ecology
• /
• v.33 no.5
• /
• pp.578-586
• /
• 2019

The purpose of this study was to investigate the change of spatial distribution of Korean red pine (Pinus densiflora Siebold & Zucc.) in Hallasan National Park by surveying the distribution and crown density and analyzing by the elevation, slope, orientation, and regional habitat in 2006 and 2015. The total area of the Korean red pine forest was 1,259.9 ha in 2015, which increased by 51.4 ha, or 4.1%, compared to 1,208.5 ha in 2006. For the past 10 years, the area of sparse density with crown density of 11% to 40% of Korean red pine increased by 59.8 ha, the area of moderate density with crown density of 41% to 70% increased by 59.0 ha, and the area of dense density with 71% or more crown density increased by 67.3 ha. In terms of the altitude above sea level, the Korean red pine forest area between 1,010 m and 1,400 m was the largest at 1,003.0 ha or 79.6% of the total area in 2015. The area between 1,100 m and 1,300 m increased, and the area of dense density decreased significantly while the areas of moderate density and sparse density increase. There was no notable change according to the land slope, and the area increased from 2006 regardless of the slope. By direction, 56.4% were distributed in the southwest and southeast directions centered on the south-facing slope with the increase of 27.8 ha over the 10 years while the northwest and northeast directions centered on the north-facing slope decreased by 7.6 ha. Regarding the distribution change of the Korean red pine forest by the region, the Yeongsil area showed an increase of 25.5 ha, or 49.6% of the total area increase, in 2006 while the Ibseog-oreum area including the right side on the Sanbeoleum mountain valley increased by 20.4 ha. The distribution in the Gaemideung area that includes Jogeundeule increased by 7.4 ha while that of Sogbat in Sungpanak Trail decreased by 1.9 ha. This study analyzed the changes in the distribution area and crown density of the Korean red pine forest according to the altitude, slope, direction, and regional habitat in Hallasan National Park. The expansion of Korean red pine forest distribution was limited to the areas where the grass and the shrub was the dominating vegetation structure, or the forest gap was created by the disturbance. On the other hand, the distribution area of the Korean red pine forest surrounded by deciduous broad-leaved forests or mixed vegetation structure is considered to result from the change in density more than the area due to competition with deciduous broad-leaved trees.

• Journal of Bio-Environment Control
• /
• v.28 no.4
• /
• pp.411-419
• /
• 2019

The purpose of this study was to analyze the growth and functional differences between C. rotundus and G. littoralis according to different electrical conductivity (EC) conditions in reclaimed soil conditions. C. rotundus and G. littoralis seeds were sown in a tray and managed for seedlings stage for eight weeks. They were transplanted in the pots containing reclaimed soils sampled in the Saemangum region. The plants were grown in the reclaimed land soil for 12 weeks under the control, 1, 2, 4, and $8dS{\cdot}m^{-1}$ conditions and in horticultural soils with EC $1.0dS{\cdot}m^{-1}$. Plant height, leaf length and width of C. rotundus were the highest in EC $1dS{\cdot}m^{-1}$. Leaf, flower and tuber numbers of C. rotundus were the highest in EC $2dS{\cdot}m^{-1}$ and the lowest in EC $8dS{\cdot}m^{-1}$, and SPAD was the highest in EC 2 and $4dS{\cdot}m^{-1}$ and the lowest in EC $8dS{\cdot}m^{-1}$. The fresh weights of shoot and root of C. rotundus grown under EC $2dS{\cdot}m^{-1}$ increased and then decreased as the concentration increased. When compared plant growth between reclaimed soil and horticulture soil with EC $1dS{\cdot}m^{-1}$, the fresh weights of shoot and root, SPAD, leaf number, flower number, and tuber number were higher in horticultural soils. Although G. littoralis grown under EC $8dS{\cdot}m^{-1}$ was the lowest in all growth parameters, there were no significant differences among other EC treatments. C. rotundus had the highest p-coumaric acid content in EC $1dS{\cdot}m^{-1}$. And the catechin content in shoot of G. littoralis was the highest in the control, and root of Glehnia littoralis had the highest benzoic acid contents in EC $1dS{\cdot}m^{-1}$. If the soil EC is well managed within $4.0dS{\cdot}m^{-1}$, two plants would be cultivated in reclaimed land.

• (The)Study of the Eastern Classic
• /
• no.55
• /
• pp.265-291
• /
• 2014

Cheongeumrok is the journal of Gwonwoo(卷宇) Hong Chan-yu(1915-2005) during the period of January 9, 1969~January 14, 1982. He was personally involved in the foundation of a corporation called Yudohoi and also all of its operation, which makes him the most knowledgeable person about its history. His Cheongeumrok thus seems worthy enough as a proper material to arrange its history. Cheongeumrok consists of total 19 books, amounting to approximately 3,300 pieces of squared manuscript paper containing 200 letters per piece. He wrote it in Chinese and sometimes followed the Hangul-style word order while writing in Chinese. Many parts of the manuscript were written in a cursive hand with many Chinese poems embedded throughout it. The manuscript offers major information related to the corporation Yudohoi extracted from his journal. 1. There was a meeting of promoters to commemorate the foundation of the corporation in November, 1968, and it was in January, 1969 that it was established after getting a permit from the Ministry of Culture and Communication in January, 1969(Permit No. of Ministry of Culture and Communication: Da(다)-2-3(Jongmu(宗務)1732.5)). 2. Its office was moved from the original location of the 3rd floor of Wonnam Building, 133-1 Wonnam-dong, Jongro-gu, Seoul(currently Daekhak Pharmacy in front of Seoul National University Hospital) to Room 388 of Gwangjang Company, 4 Yeji-dong, Jongro-gu(office of Heungsan Social Gathering) and to second floor of KyungBo building, 21 Kyansu-dong, and to 3rd floor of Geongguk Building in Gyeongwoon-dong. 3. Its operational costs were covered by the supports of Seong Sang-yeong, the eldest son of Seong Jong-ho, the chairman of the board, later Kim Won-tae and Gwon Tae-hun, next chairmen of the board, and Hong Chan-yun, a director, since 1979. 4. His Confucian activities include participating in Seonggyungwan Seokjeonje (成均館 釋奠), joining in the erection of the Parijangseo(巴里長書) Monument and the publication of its commemorative poetry book, compiling the biographies(not completed) of Confucian patriotic martyrs for independence, and participating in the establishment of family rituals and regulations as a practice member. 5. His Yudohoi had a dispute with Seonggyungwan and lost a suit at the High Court in July, 1975 and Supreme Court in February, 1976. 6. There were discussions about its unification with Seonggyungwan Yudohoi, but there was hardly any progress. 7. Yudohoi started to provide full-scale courses on Confucian and Chinese classics under the leadership of Director Hong Chan-yu in 1979, and they have continued on today. Its courses for scholarship students including those for common citizens boast a history of 29 years and 220 graduates.

• (The)Study of the Eastern Classic
• /
• no.62
• /
• pp.291-319
• /
• 2016

The purpose of this study is aesthetical inquiry on agreement inherent in the 'Pyeongkunyul of "Siakhwaseong" "Yulryo" is to have come from the 'Taekuk'. as the structure of 'Yumyaungdaedae' which 'represents a "Dosu". it becomes "Habsanweil" and it consists of "HwangjongYul" on it. There are two kinds of ways to "Pyeongkunyul" and "Sambunsonikyul". "PyeongkunYul is characterized by soundly solving the challenges of the "Jueibulban". "Yulryo" is to pursue a 'Hwa' through that "Eum" response each other. The human ear to listen to "Yul" and can be divided "Yul" because the same "Eum" is to meet with one another. The other two 'Eum' at the same time the "Maeknory" is caused by the ratio of the frequency. because "Hwaibudong". In the "DongEum" and 'octave of Eum' is not a "Maeknory" when listening ear of a person 'Dong'. In contrast, "Hwa" is a sound relationship revealed in "12Yul" in "Dong Eum" with the exception of 'octaves of Eum', that is the most easy to hear 4Do(5Do) at "Yulryo" From the point of view for "Joenchecaeyong", 4do forms a pure sound there is no Maeknory, such as "Dongeum", only partial ones in the "12Yul" by "Sambunsonik". 4Do(5Do) in "Pyeongkunyul" although though the "Maeknory" of about times put to 3 seconds to occur, so that makes the perfect "Hwa" in all of the "12Yul" "Yulryo" is apparent to the sound. "YangYul" and "Eumryo" that began from "Taekuk" which must be extended to the same "Eumga" Therefore "12Yul" consisting "Pyeongkunyul" is based on the "Yackry" of "Habsanweil" As a whole to achieve the overall Harmony and based on the As aesthetical on agreement inherent of "Hwa".

• Asia-Pacific Journal of Business Venturing and Entrepreneurship
• /
• v.16 no.3
• /
• pp.177-191
• /
• 2021

Due to the development of mobile devices and streaming technology, many changes in consumption patterns have appeared. In addition, social impact is becoming an era of non-face-to-face consumption due to the panthermic environment of COVID-19. Accordingly, in line with the non-face-to-face consumption trend, we focused on the importance of live commerce, which is emerging as a new distribution channel, and tried to investigate the causal relationship that the characteristics of live commerce and show hosts have on purchase intention. The respondents of this study were 235 general adults of live commerce users. Interaction, economics, entertainment as the characteristics of live commerce and attractiveness, professionality, and awareness as the characteristics of show hosts were set as independent variables. Purchase intention was set as the dependent variable, and content flow was set as the mediating variable. As a result of the study, it was found that the characteristics of live commerce such as Interaction, economics, entertainment, and the characteristics of show hosts such as attractiveness, professionality, and awareness all had a positive (+) significant effect on purchase intention. The impact was shown in the following order: entertainment of live commerce, awareness, attractiveness, professionality of show hosts, economics, interaction of live commerce. In addition, the results of the mediating effect of content flow on purchase intention are as follows. Content flow was found to play a mediating role between interaction, entertainment, attractiveness, professionality, awareness and purchase intention. On the other hand, economics was analyzed to have no mediating effect. The implications of this study are as follows. Companies and show hosts that sell products in live commerce should sell products that can inspire consumers rather than simply sell products. In addition, it is considered that content that provides entertainment and attractions gives pleasure to consumers. If not only a well-recognized show host, but also people with high recognition in various fields such as influencers and creators, become show hosts, consumers' content flow and purchase intentions will increase. And vendors must offer interesting content development and reasonable prices. Show hosts need to focus on active communication with consumers.

• Journal of the Korean Institute of Landscape Architecture
• /
• v.49 no.3
• /
• pp.40-52
• /
• 2021

Various peoples lived in Changbai Mountain in each era, and the peoples of each period regarded Changbai Mountain as part of their own religious culture. Existing studies on the culture of Changbai Mountain are conducted only based on the events of a specific period, but how the sacredness of Changbai Mountain has changed from time to time, how it is related to the religious culture of the people of each period, and how sacred the areas and spaces have changed. There has been no research to that extent. The purpose of this study is to examine and analyze the meaning of Changbai Mountain's sacredness that has changed from time to time. In order to examine the change of the sanctity of Changbai Mountain through synchronicity, the study focused on the hierophany occurring between the religious culture of the peoples of each period and the space of Changbai Mountain. Specifically, the activities to protect the sacred objects and sacred spaces revealed by the hierophany were considered, and the change of the sanctity of Changbai Mountain was interpreted with the derived results. The summary of the results of this study is as follows. The sacred activities of Changbai Mountain have changed from time to time. During the pre-Qing dynasty, civilians performed incarnation rites, holy god rites, mountain god ceremonies, and willow god rites for livelihood and survival, and the king of the Jin dynasty offered rituals to the Changbai Mountain gods as rituals such as Four Mountains(Yuezhen). During the Qing Dynasty, the emperor built Wangji Temple and sent a government official to make a ritual to the Changbai Mountain god as the best ritual to symbolize the country. In modern times, Bagua Temple was built on the top of Changbai Mountain and sacrifices were made to the Changbai Mountain gods, and the nature of Changbai Mountain. Humans living in Changbai Mountain area were judged through the tricks of the Bagua Mountain. In addition, during this period, civilians performed ritual activities centering on the god Shanshenlaobatou, who personified life and production. In summary, the sacred activities of Changbai Mountain were shamanistic rituals based on animistic ideology in the pre-Qing dynasty, the best imperial rites for honoring the sacred as an imperial sanctuary in the Qing dynasty, and the Taoist ideology of migrants in the modern period. It had been transformed into a ceremonial activity. And the meaning of Changbai Mountain, viewed as a sacred activity, was elevated from the mountain of livelihood in the pre-Qing dynasty to the mountain of the nation in the Qing dynasty, and then changed to the mountain of modern production.

• KOREAN JOURNAL OF CROP SCIENCE
• /
• v.66 no.1
• /
• pp.37-71
• /
• 2021

Rapeseed is a typical winter crop, and its freezing stress tolerance is a major feature for winter survival. Therefore, it is important to comprehend clearly the physical and molecular mechanisms of rapeseed under freezing stress conditions. This study investigates the physical and transcriptome changes of two rapeseed lines, 'J8634-B-30' and 'EMS26', under cold acclimation and freezing temperature treatments. The proline content of 'J8634-B-30' at 5 ℃ increased 8.7-fold compared to that before treatment, and there was no significant change in that of 'EMS26' RNA-sequencing analysis revealed 5,083 differentially expressed genes (DEGs) of 'J8634-B-30' under cold acclimation condition. Among the genes, 2,784 (54.8%) were up-regulated and 2,299 (45.2%) were down-regulated. The DEGs of 'EMS26' under cold acclimation condition were 5,831 genes, and contained 2,199 up-regulated genes (37.7%) and 3,632 down-regulated genes (62.3%). Among them, only DEGs annotated in the cold response-related signaling pathways were selected, and their expression in the two rapeseed lines was compared. Comparative DEGs analysis indicated that cold response related signaling pathways are proline metabolism and ABA (Abscisic acid) signaling. And ICE (Inducer of CBF expression) - CBF (C-repeat-binding factor) - COR (Cold-regulated) signaling were the significantly differentially expressed transcripts in the two rapeseed lines. The major induced transcripts of 'J8634-B-30' induced P5CS (Δ'-pyrroline-5-carboxylate synthetase), which is related to proline biosynthesis, PYL (pyrabactin resistance-like protein, ABA receptor) and COR413 (cold-regulated 413 plasma membrane 1). In conclusion, these result provide a foundation for understanding the mechanisms of freezing stress tolerance in rapeseeds. Further functional studies should be performed on the freezing stress-related genes identified in this study, which can contribute to the transgenic and molecular breeding for freezing stress tolerance in rapeseed.

• Journal of the Korea Academia-Industrial cooperation Society
• /
• v.22 no.2
• /
• pp.565-576
• /
• 2021

This study was undertaken to measure changes in the composition of elk velvet antlers, by considering the part and growth days (40th day, 60th day). The collected samples were divided into the tip, upper, middle, and base part by position. Samples were analyzed for moisture, crude protein, crude fat, crude ash, crude fiber, pH, minerals, and fatty acid and amino acid contents. The amounts of crude protein and crude fat were determined to be highest at the tip of the velvet antler by position, whereas dry matter and crude ash were high at the base. Crude protein contents were increased in the upper part but were decreased at the base, when assessed by growth day. Conversely, crude fiber and crude ash were found to be increased at the base by growth day. The pH value was determined to be lower at the tip, but did not differ when evaluated by growth day. Mineral contents (Ca, P, K) differed significantly by growth day in the middle portion of the antler. Saturated fatty acids tended to increase by growth day, whereas unsaturated fatty acids showed a decreasing trend. However, no significant difference was obtained for any of the components. Most amino acids were found to be high in the 60 days velvet antler, except isoleucine (Ile), which showed low levels at day 60. These results provide information on the changes in the composition of antlers, in cases of early cutting.

• Journal of The Korean Society of Grassland and Forage Science
• /
• v.40 no.4
• /
• pp.221-226
• /
• 2020

This experiment was conducted to compare the seed productivity of the Italian ryegrass(Lolium multiflorum Lam.) varieties sown in the spring in Gangwon region. The experiment was randomized block design with three replications. The Experimental field was located in alpine areas of about 600 m above sea level in Gangwon province. The tested Italian Ryegrass varieties were 'Greenfarm', 'Greencall' and 'Kowinearly' developed by National Institute of Animal Science, RDA. Italian Ryegrass varieties were sown on March 26, 2020, and the harvest was on the 60th day of mean heading date, July 2. The heading date of Kowinearly was May 8, but Greenfarm and Greencall was May 4. The plant length was the largest in the Kowinearly variety. However, the Kowinearly suffered severe lodging. There was no significant difference in the length of spike among varieties, and the number of seeds per spike was the lowest in Greenfarm at 118.5 seed/spike. As for the seed weight per spike, the Greenfarm variety was significantly lower at 0.56 g/spike, but the 1,000 seed weight was the heaviest in the Greenfarm at 2.5g.. The number of spike per unit area was the highest in Greenfarm at 906/㎡. The dry matter content of seeds was the highest in Greenfarm at 54.3%, and for straw, Kowinearly was the highest at 35.3%. Seed productivity was not significant among varieties, and the average was 1,493 kg/ha. The yield of straw after seed production was also not significant among varieties (P>0.05), and the average was 3,172 kg/ha. From the above results, the production of Italian ryegrass seeds through spring sowing in the Gangwon region is not much than autumn seeding, requiring the input of various technologies to increase productivity in the future, and it is desirable to determine the production cost through economic analysis was judged.

• Korean Journal of Agricultural and Forest Meteorology
• /
• v.23 no.4
• /
• pp.251-267
• /
• 2021

Remotely sensed vegetation indices (VIs) are empirically related with gross primary productivity (GPP) in various spatio-temporal scales. The uncertainties in GPP-VI relationship increase with temporal resolution. Uncertainty also exists in the eddy covariance (EC)-based estimation of GPP, arising from the partitioning of the measured net ecosystem CO2 exchange (NEE) into GPP and ecosystem respiration (RE). For two forests and two agricultural sites, we correlated the EC-derived GPP in various time scales with three different near-surface remotely sensed VIs: (1) normalized difference vegetation index (NDVI), (2) enhanced vegetation index (EVI), and (3) near infrared reflectance from vegetation (NIRv) along with NIRvP (i.e., NIRv multiplied by photosynthetically active radiation, PAR). Among the compared VIs, NIRvP showed highest correlation with half-hourly and monthly GPP at all sites. The NIRvP was used to test the reliability of GPP derived by two different NEE partitioning methods: (1) original KoFlux methods (GPP_Ori) and (2) machine-learning based method (GPP_ANN). GPP_ANN showed higher correlation with NIRvP at half-hourly time scale, but there was no difference at daily time scale. The NIRvP-GPP correlation was lower under clear sky conditions due to co-limitation of GPP by other environmental conditions such as air temperature, vapor pressure deficit and soil moisture. However, under cloudy conditions when photosynthesis is mainly limited by radiation, the use of NIRvP was more promising to test the credibility of NEE partitioning methods. Despite the necessity of further analyses, the results suggest that NIRvP can be used as the proxy of GPP at high temporal-scale. However, for the VIs-based GPP estimation with high temporal resolution to be meaningful, complex systems-based analysis methods (related to systems thinking and self-organization that goes beyond the empirical VIs-GPP relationship) should be developed.