• Journal of fish pathology
• /
• v.34 no.2
• /
• pp.255-259
• /
• 2021

This is the first report describing acute mass mortality occurred in juvenile olive flounder (Paralichthys olivaceus) caused by gas bubble disease (GBD). A total of 610 fish (average weight = 35 g), which were more than half of the fish acclimated at 17℃ in an aquarium, were killed within two days of acclimation. The dead and moribund fish showed excessively opened opercula and mouths, and occasionally, severe exophthalmia. Through microscopic observation, numerous gas emboli were found in the gills of the dead and live fish, while the fish were not infected with any microbial pathogens. The dissolved oxygen (DO) saturation level of the rearing water and seawater nearby the facility reached 145% and 286%, respectively, whereas other water quality parameters (such as salinity, pH, and chemical oxygen demand) were normal. The extreme saturation rate of seawater in the shore nearby seemed to be due to an enormous algal bloom that occurred there. Through molecular identification based on 18S rDNA sequences, the most dominant algal species was most closely related to Ulva californica (99.87% sequence identity) followed by U. prolifera, U. linza, and U. curvata (99.81%). Therefore, it can be concluded that supersaturated seawater due to mass algal bloom caused gas bubble disease in the olive flounder, leading to mass mortality. After technical adjustment, such as increased aeration, lowered water circulation rate, and inlet water filtration using micro-pore carbon filters, the DO level became normal, no further mortality occurred and the status of the fish was stabilized.

• Mycobiology
• /
• v.49 no.3
• /
• pp.223-234
• /
• 2021

Itajahya rosea was found growing in association with Leucaena leucocephala plants at Savitribai Phule Pune University campus in India. The species identity was confirmed by phylogenetic analysis based on ITS and LSU regions of rDNA, wherein, our fugus was placed along with I. rosea in phylogenetic tree. It represents first record of I. rosea from India. Frequent visitation by Drosophila species on I. rosea fruiting body particularly on gleba was observed. The Drosophila got attracted to the detached gleba under the laboratory conditions and even sometimes, they prefer to sit over the gleba as compare to their food banana. It suggested that I. rosea gleba or pseudostipe produces some compounds for attraction and feeding behavior of Drosophila species. Therefore, we characterized the volatile attractants produced by gleba and pseudostipe of I. rosea by GC-MS analysis. Nineteen compounds were identified from gleba while nine compounds were recovered from the pseudostipe. Out of them, blends of three abundant odor producing volatile compounds were reported namely, Hexadecane, Pentadecane and Nonadecane, which are responsible for attraction of Drosophila toward the gleba. Three fatty acids namely 9,12-octadecadienoic acid (Z,Z), hexadecanoic acid and benzoic acid ethyl ester produced are served as an appetitive signal through olfactory response of Drosophila, so the flies were feed on the gleba. Two pheromones' compounds, heneicosane and (+)-(5S,9S)-5,9-dimethylpentadecane, were also reported in pseudostipe and gleba, respectively, which play a role in Drosophila for breeding. Our study highlights an intriguing chemical ecology of fungus-Drosophila interaction.

• Cross-Cultural Studies
• /
• v.50
• /
• pp.347-370
• /
• 2018

This paper proposes a new direction for Comparative Literature which has been deeply Eurocentric and even colonial ever since its birth. 'Comparison' in Comparative Literature has been in fact the ideological mechanism for containing, classifying, and eventually controlling all differences in the world. Literature has naturally served as a national institution of the West at epistemological and discursive level with hidden adjective "comparative". To re-conceptualize the discipline and practice of "Comparative Literature", we need to revolutionize methodology itself based on Wai Chee Dimock's idea of "Weak Theory", Foucault's "disappearance of author", and Clifford Geertz's "thick description". "Thick description" as a methodology of comparative literature re-establishes the discipline as a field of "weak theory", defusing the centrality of linguistic identity and re-making it as a "long network" of loose and missed connections. "Thick description" poses the publicness of nation-state within "confusion of tongues", problematizes the legitimacy of modern knowledge, and puts (the western) nationalism in question. With this idea as a starting point, we can re-imagine Comparative Literature anew as a field of ceaseless discourse of longer, weaker, and thicker networks of interpretation and re-interpretation of differences.

• Korean Journal of Labor Studies
• /
• v.24 no.2
• /
• pp.137-179
• /
• 2018

To reduce labor market discrimination, there are lively discussions about the role of extant labor regime based on labor unions. It includes both the critical perspective on extant labor movement and the necessity of new actors for resolving discriminations within labor market. Among new actors, the present study focuses on contingent labor centers. Specifically, we have investigated on the development and identity of contingent labor centers as coalition of local government-labor organization. The core content of this study is to reconstruct the activities and strategies of contingent labor centers throughout the longitudinal approach. From many evidences, we can confirm that contingent labor centers have evolved via three phases such as differentiation, de- politicizing, and networks. This finding also provides insights about inside relationships between contingent labor centers and outside tensions between contingent labor center and extant labor organizations. We finally discuss on the theoretical implications of contingent labor center as new actor for contingent worker movement.

• (The) Research of the performance art and culture
• /
• no.37
• /
• pp.437-464
• /
• 2018

This study used semantic network analysis to understand the academic identity and characteristics of the society of korean performance art and culture and to grasp the trend of the research. For this purpose, this study analyze the research trend of korean performance art and culture related papers based on 455 whole articles in the Journal of The Society of Korean Performance Art and Culture by the Korean Performance Art and Culture Association from 2000 to 2017. Through this research, the trends of The Society of Korean Performance Art and Culture in the period of time were identified, and the phenomenon of the performance culture field and the future development direction were suggested.

• Journal of recreation and landscape
• /
• v.12 no.4
• /
• pp.45-58
• /
• 2018

Place memory is a new way of seeing as a new concept of cultural landscape research. Various research works and discussions have recently spread in landscape studies. In particular, the, which is visible and material, is a medium in which collective memory is embedded in place memory. The purpose of this study is to extract places of memory from the collective memory of residents of Janghang, Korea, and to visualize it through semantic relations. For this purpose, semi-standardized interviews (34 persons) were conducted with residents, and frequency analysis and semantic network analysis were used. As a result, the interviewees recalled only 127 places in Janghang that existed between 1920 and 2010. Locals remember the city based on places of memory. This means that the city could be illustrated according to specific places that are frequently mentioned. For instance, the top 25 places (top 20%) explain 65.6% of all the places in the city, and the top 39 places (top 30.8%) could describe 78.7% of the places. Some places are referred to more frequently when they are in the city's symbolic landscape, and the city's identity is projected on them. Some places were mentioned only infrequently but were nevertheless very important places by which to understand Janghang. These places of memory have not appeared in the documentary records before, which shows the value of the collective memory of the locals and the effectiveness of the interviewing method. In the clustering of the semantic network, six groups of places appeared. The local residents remembered the modern industrial city and recalled it in connection with the sites of daily life. This shows the possibility of looking not only at public memory and famous heritage as a macro history but also at daily life and meaningful places as a micro history about locals. This study has significance as an initial research that identified and visualized places of memory from the perspective of local residents. Such an approach could be useful in the study of everyday life and the conservation of modern heritage.

• Journal of Digital Convergence
• /
• v.17 no.3
• /
• pp.35-45
• /
• 2019

The purpose of this study analyzed by what factors university students were impacted in the compromise of career. 213 students who enrolled in 4-year universities were divided by demographic variables and psychological variables. The results showed followings. Firstly, the interests are the first factor and then social status and sex types followed regardless of variables. Secondly, at the based on the difference of groups science major student took the sex types as the first meanwhile, humanities and art & sports major students took the interests as the first. Lastly, there were statistical differences among groups at the sex types and social status with role orientation. This study can provide differentiated and individualized career development strategies regarding group types of career role orientation.

• Journal of the Korean Society of Safety
• /
• v.34 no.3
• /
• pp.83-88
• /
• 2019

The 7,993 cases of Survey Report of Fatal Industrial Accidents conducted jointly by the MEOL and the KOSHA for the recent seven years(2007-2013) were categorized according to personal and occupational characteristics, industry types, business sizes, job types, activities at the time accident, types of accidents, material agents(assailing materials), unsafe conditions, and unsafe acts. And it is found that among the 72.2 percent of fatal occupational accidents in the construction and manufacturing industries are caused by falling, sticking, bumping and being caught under objects & overturning. For this study, through the empirical analysis on causes of fatal industrial accidents, was used to identity high risk groups based on total data of 7,993 victims of occupational accidents. An annual fatal occupational injury (FOI) rate per 10,000 workers was about 0.47‱. The middle-aged group and the elderly group showed the highest FOI rates per 10,000 workers (0.73‱, 0.80‱), and the daily workers showed the highest FOI rate (1.46‱), and the craft and related trades workers showed the highest FOI rate (2.17‱). In case of industry type the mining industry (7.26‱) showed the highest FOI rate, followed by the sewerage, waste management, materials recovery and remediation activity industry (3.91‱) and the construction industry (2.71‱). The primary high risk target group that requires a strategy designed to reduce fatal occupation injuries caused by falling and bumping & contact(collision) is the construction industry, and the secondary high risk target group in the construction industry is classified as the equipment, machine operating and assembling workers in the construction industry, those aged 50 years old and above need the prevention measures against bumping & contact(collision) and being caught under an object & falling(objects), while those aged less than 50 years old need prevention measures against falling(persons).

• The Journal of the Korea Contents Association
• /
• v.19 no.3
• /
• pp.576-589
• /
• 2019

The objective of this study was to evaluate how wives of alcoholics could escape from the co-dependency relationship and recover their ego-subjectivity. This study conducted 1:1 in-depth interviews with five wives of alcoholics in order to achieve the study objective. Data collected from the interviews were analyzed by the phenomenological method proposed by Giorgi[1]. First, researchers extracted five subjects, including 'Co-dependency (Loss of ego-identity)', 'Impoverished life', Ego-prop', Ego-awareness', and 'Ego-subjectivity recovery' in the course of the data analysis. Secondly, researchers identified "Ego-subjectivity recovery through Ego-awareness of a wife of an alcoholic", an essential theme, by integrating all subjects. Researchers, based on the analysis results, proposed practical alternatives for various psychological treatment system and ego-prop like as counselling, family member of alcoholic wives and power of faith.

• Korean Journal of Family Social Work
• /
• no.55
• /
• pp.189-236
• /
• 2017

This study utilized the Giorgi's phenomenological analysis to understand the rearing experiences of the single adolescent parent. The study consisted of eight single parents living in the local community. The single parents had given birth during the ages between 16 and 24 and were currently rearing children between 6 months and 11 years of age. The results of the research consisted of 140 meanings, 34 subcategories, and 7 structure factors. The final structure factors consisted of 'onset as an escape from the unfulfilling reality', 'conflict upon unexpected choice situation', 'difficulties of starting and adapting to single adolescent parenting', 'brutal realities of at home single parenting', 'search for the best parenting role for the young parent', 'changes and growth associated with discovering one's self identity as a single parent', and 'concerns and wishes for a better life of the single adolescent parent'. Based on the results, discussions and suggestions to better understand the experiences of the single adolescent parent with anticipations for organized institutional aid and changes of the social attitude have been proposed.