• Journal of the Korean Society of Fisheries and Ocean Technology
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• v.22 no.4
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• pp.75-82
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• 1986

A field experiment was carried out to clarify the effect of underwater sound on the luring of fish school. The effects of. the acoustic emission on the luring of fish school were checked actually at a set net fishing site in Namhae using a commercial acoustic equipment, Dairyo-8. An emitting system of sound was designed by the authors, and the ambient noise, the sound pressure level and the reaction of fish school were measured in the set net. 1. The predominent frequency band of ambient noise was 150Hz-400Hz,.and the sound emitted was 400Hz-100Hz. The sound pressure level of ambient noise in set net was higher at the landing part, and lower at the playgrond, the gate of court and "the enterance of inclined "passage. The ambient noise was increased with the time elapse-d at the stage of hauling net, but :it was decreased suddenly at the final stage due probably to the decrease of the swimming speed of the fish school. 2. The results of the observation and the recording paper of echo sounder indicate that the effect of emitting sound in the bag net of set net was remarkable for the luring of fish school in the early stage, but decreased after 30 minutes. The reaction of fish school is more sensitiv2 to the sound pressure level than the time intervals between the emission and the pause. For the purpos~ of practical use, it is nesessary to confirm what kind of sound pressure level is the best for the luring of fish school. 3. In response to the acoustic equipment(Dairyo-8), fish school started to swarm 20 minutes after the sound emission and scattered when the sound paused. As the emitting pattern of the acoustic equiment, the three seconds of emission after one second of pause was more effective than the continuous emission at the set net fishing ground. Catch of the fish(s during th~ sound ernissio:l at the gate of court was three to five times more than that of no emission.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.19 no.8
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• pp.360-369
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• 2018

Innovative pharmaceutical company certification support policies have been implemented since 2012. This study was conducted to identify the perceptions of stakeholders and related experts on the formation process and policy satisfaction of this policy, and to identify factors that explain policy satisfaction. The survey was conducted by e-mail and facsimile of the pharmaceutical companies, universities, and government - affiliated research institutes. The effective response rate was 38.4% (61/159). As a result of the cross-sectional survey, the perception of policy necessity was the most positive among the policy formation process, and all the other stages and perception of policy satisfaction were at the medium level. As a result of examining the influential factors related to the variables of the respondents' personal variables and the policy formation process, it is confirmed that the factors that have the greatest influence on the policy satisfaction are the perception of the performance of the certified company. Also, perceptions of appropriateness and follow - up ability were similar in magnitude of impact on policy satisfaction. This study can be used as a basic data to systematically and effectively improve the certification and support policies of innovative pharmaceutical companies based on the consumer's perception. However, due to limitations such as being carried out at the beginning of policy implementation, verification and supplementation are necessary through further research.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.19 no.10
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• pp.394-400
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• 2018

Recently, it is expected to significantly increase the defense budget by acquiring large-scale weapons systems to enhance defensive capabilities. In order to secure funds needed to acquire such weapons systems, it is necessary to improve the efficiency of the defense budget. In addition, interest in economic factors affecting the domestic economy such as export opportunities and employment creation are increasing, as well as budget reduction of the defense acquisition business. In order to respond to these demands, this study conducted cost- benefit analysis and examined economic ripple effects in the implementation of defense procurement projects. However, research on economic analysis methodology considering characteristics of defense acquisition projects is still in its early stage. This study proposes a methodology to analyze the economic feasibility of defense acquisition projects and conducted a case study on the economic feasibility of the ${\bigcirc}{\bigcirc}$ guided missile project which is being prepared against local provocation. The proposed economic analysis method provides the cost-effectiveness analysis that has been performed in many weapon system acquisition projects in connection with the more general cost-benefit analysis method. This study contributes to the establishment of an improved theoretical methodology for weapon system acquisition projects.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.21 no.2
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• pp.103-114
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• 2020

On-arrival duty free will prevent Korean outbound passengers from keeping the duty free items they purchased at the departure during their travel. Most Korean tourists have requested the airport authority to install on-arrival duty free since the grand-opening of Incheon int'l airport. Considering the fierce hub airport competition in the North East Asian region, the Korean government's decision to install on-arrival duty free is regarded as a well-timed intervention. The purpose of the research was to analyze sales correlation based on a comparison of sales of both departure and on-arrival duty free and to propose an administrative implication. Compared to business conglomerates running departure duty free, on-arrival duty free operators, who are small or medium companies, have weakness in product composition, marketing, and merchandising capabilities. According to the analysis, outbound passengers, who purchased fashion accessories and leather products at the departure duty free, tended to purchase cosmetics/perfume or liquor on the arrival duty free. Such complementary purchasing behavior of passengers showed there is barely a negative correlation between departure and on-arrival duty free.

• Journal of Powder Materials
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• v.16 no.2
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• pp.138-145
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• 2009

The combination of focused ion beam (FIB) and 4 point probe nanomanipulator could make various nano manufacturing and electrical measurements possible. In this study, we manufactured individual ZnO nanowire devices and measured those electrical properties. In addition, tensile experiments of metallic Au and Pd nanowires was performed by the same directional alignment of two nanomanipulators and a nanowire. It was confirmed from I-V curves that Ohmic contact is formed between electrodes and nanomanipulators, which is able to directly measure the electrical properties of a nanowire itself. In the mechanical tensile test, Au and Pd nanowires showed a totally different fracture behavior except the realignment from <110> to <002>. The deformation until the fracture was governed by twin for Au and by slip for Pd nanowires, respectively. The crystallographic relationship and fracture mechanism was discussed by TEM observations.

• Journal of Conservation Science
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• v.35 no.5
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• pp.453-469
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• 2019

The celadon jar with inscription of 'the Fourth Sunhwa Year' is an important chronology that shows the conditions of production of the early celadon due to the inscription on the bottom including its purpose, application, and the producer. This celadon jar has been restored several times in the past. However, concerns over the structural stability, such as the separation and level differences in the joined cracks, have risen because of the aging of the repair materials, which were subjected to various environmental changes over a long time. By examining the conditions of preservation, the major damage was identified as the '入' shaped crack on the front, the 'V' shaped restored part and the crack on its left side, and the 'J' shaped crack on the back side. In the past, the cracks were found to be joined using a refined lacquer containing camphor, drying oil, rosin, etc. mixed with soil powder. The joint line was repainted with the refined lacquer and covered with gold powder. The missing parts were restored with gypsum and colored with acrylic color. After that, the repair materials were aged and emergency treatment was performed at the National Museum of Korea in 1981. At that time, Cemedine C or Cemedine C mixed with microballoons was used for reinforcing the cracks. Conservation treatment focused on removing the past repair materials and reinforcing the physically fragile parts by joining and restoring them based on the examination of the preservation condition. in addition, the area around the restored part was colored for future exhibition.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.17 no.6
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• pp.529-535
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• 1984

This study aims at obtaining the basic data for the development of pen shell culture at Yoja Bay, the southwest coast of Korea. The authors dealt with the annual gonadal changes of the pen shell, Atrina pectinata japonica, to find out the gametogenesis, reproductive cycle and spawning season, and to investigate the fluctuation in the larval occurence in Yoja Bay. From July 1983 to June 1984, an average of 20 individuals as specimens were monthly collected by commercial fishing dredge near Manwol island located at the mouth of Yoja Bay. The degree of gonadal development was determined by the histological observations as resting spent stage, early developmental stage, after developmental stage, early spawning stage, after spawning stage and degenerative stage. According to these degrees of gonadal development, annual reproductive cycle of the pen shell population was determined. From July to August, the gonads were changed through degenerative into resting stage and, in September and October, they became entirely empty gonads. From November they showed the first sign of gametogenesis developing very slowly. Nevertheless, the developing gametes did not increase in number probably owing to a phagocytic phenomenon by phagocytes which appeared in the gonad during this stage. Some individuals started spawning in April and in May majarity of individuals were in spawning stage. In June, majority of the individuals showed signs of degenerative stage. Therefore, the authors came to a conclusion that the pen shells in Yoja Bay spawn chiefly in May. And this is also supported by the result of the survey on the planktonic occurrences of the pen shell larvae. Namely, there were no larvae at all in April, only a few in May and many in June by vertical water sampling.

• The Journal of the Korea Contents Association
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• v.18 no.8
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• pp.36-50
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• 2018

The subjects of this study are three visually-impaired undergraduates currently considering if they should take a leave of absence after finishing the first year in S University located in Busan City. From March to July, 2018, this researcher explored the meaning of their university entrance and the essential meaning and structure of their school life experiences by using Giorgi's phenomenological methodology. According to the results, this author drew 32 meaningful statements and also 10 main themes, "the excitement of campus life and the name of being an undergraduate", "parents' suggestion", "something other than being a massager", "Is it a place that anyone can enter? Or, is it a special place?", "loneliness within the public", "Everything is an obstacle.", "It's not giving up, but still I am in a vague moment.", "the beginning of another conflict", and "studying in a university is not for the present but for the future". They were categorized into being a university student and the meaning of it (category1), adaptation to university life and reality (category 2), and one year after the entrance: the meaning of being a university student (category 3). Based on the above results, this author intends to provide foundational material about what universities can do for visually-impaired students to adapt to university life in the initial steps properly.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.19 no.1
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• pp.355-367
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• 2018

The purpose of this study was to identify the predictors of the quality of life in community dwelling vulnerable older women with chronic joint pain. A cross-sectional study was conducted on 234 participants registered at a visiting health care service in the public health center of C-city. The structured questionnaire were used to collect data on the general characteristics, pain rating index, pain intensity, perceived health status, functional independence, sleep pattern, depression, and quality of life from February 16 to March 13, 2017. The data were analyzed using a t-test, ANOVA, Pearson's correlation coefficients, and hierarchical multiple regression analysis. The significant factors of the quality of life including general characteristics were depression (${\beta}=-.60$, p<.001), pain intensity scale (${\beta}=-.15$, p=.007), health insurance type (${\beta}=.15$, p=.001), perceived health status (${\beta}=.14$, p=.007), duration of pain (${\beta}=-.10$, p=.019), marital status (${\beta}=.10$, p=.024), and functional independence (${\beta}=.09$, p=.036). These factors accounted for 63.1% of the total variance in the quality of life. The findings suggest that a public healthcare program on managing depression is effective in improving the quality of life in community dwelling older women with chronic joint pain. Public health nurses should intervene in nursing care for economically vulnerable aged and pain management based on a precise assessment from the beginning of pain.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.12 no.6
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• pp.2575-2587
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• 2011

Whereas the early financial information technology invested a large amount of investment on developing and adopting its own new systems. it is now focusing on reducing expenses and improving internal efficiency but applied for securing a company's competitive advantage considering the long term strategic level. As relevant researches, studies on information system quality and performance are actively going on. In previous research, the relations of the influence on the financial performance by information system quality or absorption capacity have been reviewed. In other words, the information system quality and absorptive capacity, respectively, in the position of the independent variables have been studied as a factor to have a significant effect on financial performance while the research on the relationship between these two variables is lacking. Thus, in this researches, quality of financial information systems and the absorptive capacity, respectively, as independent variables and parameters on the mediating effect on the financial performance were researches. As a result, quality of financial information systems showed a positive effect on the performance of company, the absorption capacity was perfect to play the role of mediating one. However, absorptive capacity as an independent variable has a positive impact on financial performance, but the quality of financial information systems as a parameter was not affected in any manner.