• Journal of the Korean Society of Fisheries and Ocean Technology
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• v.58 no.3
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• pp.193-198
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• 2022

In this study, for the purpose of reducing the catch of small giant octopus in a net pot, an escape experiment of octopus was performed on five types of escape rings of different sizes. As a result of the experiment, the smallest giant octopus with a weight of 406 g was found to escape from an escape ring with a diameter of 30 mm or larger, and 592 g octopus, a weight similar to the octopus of the current minimum landing weight (600 g), escaped from an escape ring with a diameter of larger than 40 mm. An individual weight with 406 g becomes 39 mm when converted from a diameter of 25 mm circular escape vent; that is, the circumference to the inner diameter of the mesh. It can be inferred that the converted mesh size of 39 mm cannot escape. Logistic regression analysis was performed using a generalized linear model (GLM) to investigate the correlation between the ratio of escape ring size/Mantle diameter (R/MD) and the escape rate. As a result, it was found that there was a significant correlation between the R/MD ratio and the escape rate and that the higher the R/MD ratio, the greater the escape rate. As a result of logistic regression analysis, the R/MD value was denoted 0.520 with the 50% escape rate. In addition, it can be estimated to be about 50 mm when converted to the mesh size. Therefore, in this study, the diameter of the escape ring and the size of the escape possible of the octopus were experimentally considered. It was found that there was a significant correlation.

• Journal of the Korean Institute of Electrical and Electronic Material Engineers
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• v.35 no.6
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• pp.594-602
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• 2022

Cast-resin transformers are widely installed in various electrical power systems because of their low operating cost and low influence on external environmental factors. However, when they have an internal defect during the manufacturing process or operation, a partial discharge (PD) occurs, and eventually destroys the insulation. In this paper, a Rogowski-type PD sensor was studied to replace commercial PD sensors used for the insulation diagnosis of power apparatus. The proposed PD sensor was manufactured with four different types of PCB-based winding structures, and it was analyzed in terms of the detection characteristics for standard calibration pulses and the changes of the output voltage according to the distance. The output increased linearly in accordance with the applied discharge amount. It was confirmed that the hexagon structure sensor had the highest sensitivity, because the winding cross-sectional area of the sensor was larger than others. In addition, as the distance from the defect increased, the output voltage of the sensors decreased by 7.32% on average. It was also confirmed that the attenuation rate according to the distance decreased as the input discharge amount increased. For the application of this new type sensor, PD electrode system was designed to simulate the void defect. Waveforms and PRPD patterns measured by the proposed PD sensors at DIV and 120% of DIV were the same as the results measured by MPD 600 based on IEC 60270. The proposed PD sensors can be installed on the inner wall of the transformer tank by coating its surfaces with a non-conductive material; therefore, it is possible to detect internal defects more effectively at a closer distance from the defect than the conventional sensors.

• Proceedings of the KSAR Conference
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• 2001.03a
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• pp.20-20
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• 2001

It has been reported that cloning cattle is inefficient. One of the problems was placental abnormality, finally resulting in fetal mortality after transfer of nuclear transfer (NT) bovine embryos. This study was focused on the allocations of embryonic cells to the inner cell mass (ICM) or to the trophectoderm(TE) in NT bovine blastocysts. Somatic cells were derived from a Day 45 fetus of gestation, individually transferred into enucleated oocytes and developed to the blastocyst stage in vitro. Differential staining was used to assess the qualify of blastocysts derived from NT, IVF and in vivo. Development rate of NT embryos to blastocysts (25.0%, 41/164) was similar to that of IVF embryos (28.7%, 49/171). The total cell number of NT blastocysts (101.3$\pm$45.9) was not different compared with that of IVF embryos (107.9$\pm$34.2, P>0.05), but was lower than in vivo embryos (122.5$\pm$21.6, P<0.05). Ratio of ICM/total cells was higher in NT embryos (51.6$\pm$ 18.6%) than in IVF and in vivo embryos (42.3$\pm$ 15.3% and 34.9$\pm$8.9%, respectively) (P<0.05). Most IVF (56.8%, 25/44) and in vivo blastocysts(80.8%, 21/26) was distributed in the proportion of ICM/total cells ranging from 20 to 40% group. However, most NT blastocysts was biased in the 40-60%(34.1%, 15/44) and >60% (31.8%, 14/44) groups. Our findings suggest that placental abnormalities or early fetal losses in the present cloning system may be due to aberrant allocation of NT embryos to the ICM cells.

• Journal of Animal Science and Technology
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• v.65 no.2
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• pp.401-411
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• 2023

Many studies have been conducted to improve technology for semen cryopreservation in pigs. However, computer-assisted analysis of sperm motility and morphology is insufficient to predict the molecular function of frozen-thawed semen. More accurate expression patterns of boar sperm proteins may be derived using the isobaric tags for relative and absolute quantification (iTRAQ) technique. In this study, the iTRAQ-labeling system was coupled with liquid chromatography tandem-mass spectrometry (LC-MS/MS) analysis to identify differentially expressed CM10-fractionated proteins between fresh and frozen-thawed boar semen. A total of 76 protein types were identified to be differentially expressed, among which 9 and 67 proteins showed higher and lower expression in frozen-thawed than in fresh sperm samples, respectively. The classified functions of these proteins included oxidative phosphorylation, mitochondrial inner membrane and matrix, and pyruvate metabolic processes, which are involved in adenosine triphosphate (ATP) synthesis; and sperm flagellum and motile cilium, which are involved in sperm tail structure. These results suggest a possible network of biomarkers associated with survival after the cryopreservation of Duroc boar semen.

• The Korea Journal of Herbology
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• v.24 no.2
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• pp.49-56
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• 2009

Objectives : Inflammation is important event in the development of vascular diseases including hypertension, atherosclerosis, and restenosis. Bodusan (BDS) was a traditional Korean herbal medicine and widely used in treatment of gastrointestinal complaint and stomach ulcer. The aim of this study was to determine whether BDS and its components inhibit production of nitrite, PGE2 and proinflammatory cytokines in lipopolysaccharide (LPS)-treated RAW 264.7 macrophages. Methods : Cytotoxic activity of BDS and its components on RAW 264.7 cells was using 5-(3caroboxymcrophages. eth-oxyphenyj)-2H-tetra-zolium inner salt (MTS) assay. The nitric oxide (NO) production was measured by Griess reagent system. And proinflammatory cytokines were measured by ELISA kit. The levels of inducible nitric oxide synthase (iNOS) and cyclooxygenase-2 (COX-2) expression were detected by western blot. Results : Our results indicated that BDS and its components significantly inhibited the LPS-induced NO and PGE2 production. Moreover. BDS and its components inhibited iNOS and COX-2 expression accompanied by an attenuation of TNF-${\alpha}$, IL-11${\beta}$, IL-6 and MCP-1 formation in macrophages. Conclusions: These results indicate that BDS and its components have potential as an anti-inflammatory agent.

• Design Convergence Study
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• v.14 no.4
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• pp.193-208
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• 2015

This study is to search a meaning of treagedy to show by the 6th generation through charecter's tragedy in the 6'th Generation Chinese film. For this, it examined an inner characteristic behind of the tragedy's moment and externalized ending in directors' films of the 6'th Generation's representation. The 6'th Generation of Chinese film reorganized newly Chinese film's cultural topography in the 1990s. The 6'th Generation films, which rebelled against the primary melody and the 5'th Generation on the system, is expressed commonly a tragedy moment with the time and space by character's tragedy. Characters of the 6'th Generation in the tragedy moment attempts various efforts to escape from the tragedy moment. However, no one can overcome the wall of reality, and their concealed emotion as keeping it out of the public eye lead that play. The moment that the 6th generation film meets a tragedy, the main character's accumulated tragedy situations begin to unfold all together. A tragedy embodied through : a collapsed tragedy due to the past's wound, a tragedy due to loss of jobs, a tragedy due to a family's departure, a tragedy from a time of chaos, a tragedy of a woman who became a head of a household and other tragedies.

• Journal of the Korean Society of Food Culture
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• v.24 no.5
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• pp.525-532
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• 2009

School dietitians are divided into two groups according to their status of employment, school nutrition teachers and dietitians, with the latter being irregularly employed by the institution. In this study, the job satisfaction, communication ability, work performance and importance in feeding services and dietetic counseling of both groups were compared. To accomplish this, 100 regularly employed school nutrition teachers (regularly employed) and 101 dietitians (irregularly employed) were surveyed by questionnaire. The results were as follows: (1) The irregularly employed dietitians showed a lower level of job satisfaction than the school nutrition teachers. This was likely because the school nutrition teachers belonged to the strong inner circle of school teachers and cafeteria workers, and had enough time to prepare for class lectures and consultancy. Conversely, the irregularly employed dietitians generally handle extra office work in addition to their primary duties. Despite these differences, both parties agreed that it was necessary to change the work system. Additionally, school dietitians reported that they had little opportunity for further training for career development. (2) Both parties had good communication skills; however, the irregularly employed dietitians had more conflicts with other staff members than the regular employees. (3) Job performance and job importance level was compared among employees involved in school feeding services and nutrition counseling. No significant differences were observed between dietitians and nutrition teachers in either group (p<0.05). However, the school nutrition teachers showed better skills than school dietitian with respect to public relations, running independent counseling offices, and using effective tools and materials. Job performance level was lower when compared to job importance level for all items, which meant the job was not well performed when compared to the work importance awareness.

• Journal of English Language & Literature
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• v.56 no.6
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• pp.1295-1310
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• 2010

In her "After Language Poetry: Innovation and Its Theoretical Discontents" in Contemporary Poetics (2007), Marjorie Perloff spotted Steve McCaffery's and Lyn Hejinian's points of reference and opacity/transparency in poetic language, and theorizes in her perspicacious insights that poetic language is not a window, to be seen through, a transparent glass pointing to something outside it, but a system of signs with its own semiological interconnectedness. Providing a critique and contextualizing Perloff's argument, the purpose of this paper is to introduce a topological model for poetry, language, and theory and further to elaborate the relation between the theory and the practice of language poetry in terms of "the revolution of language." Jacques Lacan's poetics of knowledge and of the topology of the mind, in particular, that of "extimacy," can articulate the way how language poetry problematizes the opposition between inside and outside in the substance of language itself. In fact, as signifiers always refer not to things, but to other signifiers, signifiers becomes unconscious, and can say more than they actually says. The original signifiers become unconscious through the process of repression which makes a structure of multiple and polyphonic signifying chains. Language poets use this polyphonic language of the Other at Freudian "Another Scene" and Lacan's "Other." When the reader participates the constructive meanings, the locus of the language writing transforms itself into that of the Other which becomes the open field of language. The language poet can even manage to put himself in the between-the-two, a strange place, the place of the dream and of the Unheimlichkeit (uncanny), and suture between "the outer skin of the interior" and "the inner skin of the exterior" of the impossible real of definite meaning. The objective goal of the evacuation of meaning is all the same the first aspect suggested by the aims of the experimentalism by the language poetry. The open linguistic fields of the language poetry, then, will be supplemented by The Freudian "unconscious" processes of dreams, free associations, slips of tongue, and symptoms which are composed of this polyphonic language. These fields can be properly excavated by the methods and topological mapping of the poetics of extimacy and of the klein bottle.

• Journal of Hydrogen and New Energy
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• v.35 no.3
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• pp.280-289
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• 2024

In this study, a cryogenic vessel was constructed to maintain and control the safe pressure of liquid hydrogen boil-off gas (BOG), and the numerical analysis was conducted on the development of computational fluid dynamics model inside the high-pressure vessel. An evaluation system was constructed using cryogenic inner and outer containers, pre-cooler, upper flange, and internal high-pressure container. We attempted to analyze the performance of the safety valve by injecting relatively high temperature hydrogen gas to generate BOG gas and quickly control the pressure of the high-pressure vessel up to 10 bar. As a results, the liquid volume fraction decreased with a rapid evaporation, and the pressure distribution increased monotonically inside a high pressure vessel. Additionally, it was found that the time to reach 10 bar was greatly affected by the filling rate of liquid hydrogen.

• Sim-seong Yeon-gu
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• v.37 no.1
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• pp.1-30
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• 2022

This text is an attempt to understand the psychological meaning of panic attacks occurring in the young people in their early twenties who play music. A panic attack is a type of anxiety neurosis known to occur primarily in their twenties and is characterized by extreme fear and terror accompanied by various symptoms in the autonomic nervous system. Situations with occurring panic attacks were examined in three cases combined with panic attacks and mood swings, suicidal ideation, and self-mutilating behaviors, and the psychological meaning of panic attacks was reviewed for each case. In the first case, panic attacks make one think or reflect with consciousness for someone who wants to remain unconscious. In the second case, for one who hesitates to move forward in life and finds oneself in conflict, panic attacks open the inner mind and allow one to come in touch with one's deeper mind, thereby opening possibilities to transcend the conflict. In the third case, one experience the instinct and impulse of desiring to realize the unconsciousness as panic attacks and thereafter consciously realize the impulse as well. Their panic attacks, which all seem to have different meanings, are likely a powerful approach of the unconsciousness to urge a renewal from the consciousness level of the youth period.