• Journal of the Korean Society of Fisheries and Ocean Technology
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• v.32 no.3
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• pp.217-222
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• 1996

The moving behaviour of anchovy schools(There were small schools of sardine and round-herring in this anchovy schools} in the bag - net of a large scale set - net was investigated using a scanning sonar, in the Kishihata set - net fishing ground located in Nanao city Ishigawa prefecture, Japan from Dec. 1st to Dec. 4th, 1992. The results obtained are summarized as follows ; 1. Moving behaviour of fish schools between two bag - nets was more in the daytime than in the nighttime. 2. The rate of entering fish schools from the first bag -- net to the second bag - net were 78% when the fish school in the second bag -- net existed. The result suggest that fish school existence in the second bag - net affected the rate of entering fish schools from the first bag - net to the second- bag - net. However, the time of stay of fish school that entered the second bag -- net was very short when the fish school in the second bag - net existed densely. The result suggest that a high fish density in the second bag - net might enlarge the escape rate 3. The majority of fish schools moved to the center and off shore side of the bag - net when fish schools entered the bag - net.

• Journal of the Korean Society of Fisheries and Ocean Technology
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• v.39 no.4
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• pp.337-346
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• 2003

This paper describes on the system and method for automatically tracking and real-time monitoring the position of target ships relative to the own ship using a PC based radar system that displays radar images and electronic charts together on a single PC screen. This system includes a simulator for generating the GGA and VTG information of target ships and a simulator for generating the TTM and OSD outputs from a ARPA radar and then host computer accepts NMEA0183 sentences on the maneuvering information of target ships from these simulators. The results obtained are summarized as follows；1. The system developed this study can be used as a range finder for measuring the distance between two ships and as a device for providing the maneuvering information such as distance and bearing to target ships from own ship on ECS screen. 2. From the result of position tracking for a selected target ship tracked with an update rate of 5 seconds using the $\alpha$-$\beta$ tracker, we concluded that the smoothing effect by the $\alpha$-$\beta$tracker was very effective and stable except in the time interval until about one minute after the target is detected. 3. From the fact that the real-time maneuvering information of tracked ship targets via a local area network (LAN) from a host computer installed a radar target extractor was successfully transferred to various monitoring computers of ship, we concluded that this system can be used as a sub-monitoring system of ARPA radar.

• Journal of the Korean Society of Fisheries and Ocean Technology
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• v.43 no.4
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• pp.281-290
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• 2007

This study was aimed not only to develop the gill net and trap made of biodegradable monofilaments in order to prevent a ghost fishing and to protect marine ecosystem, but also to analyze their spinning process and physical properties. Results showed that the spinning speed of biodegradable polybutylene succinate(PBS) monofilament was estimated to be approximately 100m/min when spinning temperature and cooling water temperature were adjusted at $180^{\circ}C$ and $3^{\circ}C$, respectively. The breaking loads of PBS monofilaments were estimated to be $35.3kg/mm^2$ at ${\phi}0.2mm$, $46.5kg/mm^2$ at ${\phi}0.3mm$, and $49.7kg/mm^2$ at ${\phi}0.4mm$ in the dry condition, respectively. However, its breaking loads in the wet condition were reduced by 2.4-5.5%, compared to those in the dry condition. The knotted strength of PBS monofilament at ${\phi}0.2mm$ was estimated to be 98.6% of PE in the dry condition. The breaking load of PBS monofilament at ${\phi}0.3mm$ was evaluated to be 81.8% of PA, and its softness showed 3 times less than that of PA in the wet condition. The breaking load of PBS monofilament at ${\phi}0.4mm$ was 95.3% of PA, and its softness showed 1.6 times less than that of PA in the wet state. However, the load elastic elongations of two kinds of monofilaments were estimated to be 1% higher than that of PA.

• Journal of the Korean Society for Marine Environment & Energy
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• v.10 no.3
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• pp.148-154
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• 2007

This study investigated the spatial distribution of the marine debris in Jinudo in the Nakdong river estuary. Types of marine debris in Jinudo are analyzed through sampling around some portion of its sandbar shoreline. The present study and its main results are summarized as follow: 1) Monitoring system, for evaluating the volume of marine debris, was established in the coastal region of $50\;m\;{\times}\;50\;m\;(=0.002\;km^2)$ over the southern part of Jinudo. All the marine debris of conceivable form are collected and their amount was also estimated. 2) During the $1^{st}$ collection in May 2007, the total weight of the marine debris was 1,110 kg in this site, which means the density of marine debris around the shoreline is $444\;ton/km^2$. After one month later, the collected marine debris was 23.75 kg and so we have the average density of $9.5\;ton/km^2$. From these results, it is suggested that the marine debris of 316.67kg was being accumulated per day over unit area($1\;km^2$). 3) The most frequent marine debris collected during monitoring campaigns was wooden material amounting to 85.86% of the whole collection; the rest were fishing gears such as nets and buoys(5.13%), household waste(2.34%), glass(0.94%) and metals(0.27%).

• Korean Journal of Ecology and Environment
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• v.43 no.1
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• pp.103-116
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• 2010

The key objective of this study was to analyze sampling efficiency of various fish sampling gears for a lentic ecosystem health assessment. This survey was conducted at twelve sampling locations of Jinyang Reservoir in November, 2008 and June, 2009. Sampling gears used in the field were fyke net (FN), gill net (GN), trammel net (TN), casting net (CN), minnow trap (MT), and kick net (KN). Fishes sampled in Jinyang Reservoir were 29 species, in which tolerant species, as a proportions of the total numbers, dominated the fish community compared to the sensitive species. Overall sampling indicated that 28 species (3,567 individuals) were sampled by the CN and 15 species (3,108 individuals) were sampled by the FN along with 14 species (577 individuals) by the TN, 7 species (107 individuals) by the GN, 6 species (59 individuals) by MT, and 5 species (95 individuals) by KN, respectively. Statistical analysis (MANOVA), based on CPUE of the fishing gears showed that fish species and numbers of the CN were significantly (p < 0.05) greater than those of any other sampling gears. In contrast, sampling gear of MT and KN showed the least efficiency in our survey. This survey is a preliminary results for the tests of sampling gear's efficiency in lentic ecosystems, thus further extensive studies are required for the verification.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.4 no.2
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• pp.55-60
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• 1971

There are a lot of kinds of shrimps for fishing baits, but Palaemon modestus is dominant species in the Karak River. The ecology in the natural environments was reported by the author (1970) and this work is an elemental task for the larval stage in shrimp farms. Shrimps were collected from the Karak River and carried to the laboratory. Hatched larvae were reared from June 6 to June 24, 1970 for pre-experiment, and main experiment was provided from August 10 to August 24, 1970. The following is a summary of the results: 1. Hatching period in the laboratory water tank was eight hours ($20^{\circ}C\~20.9^{\circ}C$). 2. The larvae died off from the sixth day after hatch without food. 3. Feeding begins on the third day after hatch. 4. The relationship between the density of food and the consumption was not concerned when the number of Artemia nauplii was 2 to 6 per ml of water. 5. The relationship between the day (X) and the food (Y) is: $$Y=6.49824X^{1.8384}$$ 6. The carapace growth curve is: $Y=1.1608X^{0.10024}$ 7. The relationship between the food (X) and the body length (Y) is: $$Y=2.8114X^{0.12767}$$ 8. The relationship between the carapace length and the body length(Y) is : Y= 3.7564X-0.4601

• Korean Journal of Health Education and Promotion
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• v.8 no.2
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• pp.34-51
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• 1991

In the research and analysis for survey practice on stability on the nutrition intake relities to an affect influence factor for variable reason to discovers dweller in cities area which is in order to prevent an unfortunately influence that thus obviously restricted by nutrition intake would be restoration. And then attempted to avhivement of stability fulfil to correct nutrition intake needed under the establish for effectiveness measured to provide the primary required resources be considerations must accomplish certain survey of goals. Therefore subject of criticism for survey was conducted during January 4 1990 to January 24 1990 through 20 days adapted place were Seoul, Taegu and Pohang cities dweller 1206 person be conducted under the expert survey personnel by directly the survey was conducted with the questional form has atapted for its survey conclusion of result be summarixed as bellow. 1) The subject of criticism for survey was ferformed to personnel adapted age group 40 to 49 were 24.9%, Age group 50 to 59 were 18.4% shows most adult group has significant higher value rate appearenced. In consideration the education level were evaluated the college grauated ; 48.8% and High School graduated: 30.1% shows that more educated level has significant higher rate value were appearenced. 2) On the subject of criticism to evaluation for adapted personnel by native place such as larger citypeople ; 29.6%, Farming and fishing village people were 28.4%, although the classfication of job analysis for estimation appearence rate were ; students 27.4%, Sales and service field personnel rate ; 15.1% and expert technique field personnel were ; 90% comprehensively appearenced. Although consideration for ecnomics situation review to the middle level shows of rate ; 61.7% and lower level was appearenced rate ; 23.9% of each others. 3) The people of resident in cities were appearenced nutrition intake has more than 2 weeks continuousely practiced by experiance rate shows ; 72% thus intake has experianced rate were 74.6% and female was 68.5% affact is comprehensively male has more many higher rate valued. In the classfication by age group 60 year old has 100% they have experiaced of nutrition intake and age group 50 to be appearenced its rate ; 76.4 % and age group 40 were 75.5% Thus result of survey for comparative rate shows in generally say more aged group has intake significant higher than younger age of group. Nevertheless, age group 10 years old be experienced of nutrition of intake rate ; 63.2% and age group 20 shows 73.9% was comparative more significant higher than age group 30 years old level adolescents.

• Culinary science and hospitality research
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• v.22 no.5
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• pp.200-213
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• 2016

This study is to compare the differences in food quality between traditional Korean restaurants and Western-style restaurants, and then to identify the shortcomings as traditional Korean food prefered than western food. The object of this study is not only to provide the basic data of the domestic food service industry to enable the traditional food ingredients but also increase the sales produced in the farm and fishing economy. Western-style and traditional Korean restaurant food quality were subjected to an IPA analysis to understand the importance and satisfaction with each of them. The IPA analysis of Western-style restaurants and traditional Korean restaurants showed that using regional specialties ingredients, healthy food, and the number of dishes in a set menu were commonly included in the first quadrant. Menu planners of Korean restaurants in should consider the need to develop traditional food using regional ingredients prepared by a reputable chef from the region, and develop delicious healthy food using local specialties without artificial flavors. In addition, considering the demographic characteristics, the ideal food should target visitors in their 40s who with 300~400,000 to spend with friends or colleagues.

• Journal of the Korean Institute of Traditional Landscape Architecture
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• v.38 no.1
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• pp.53-66
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• 2020

This study was attempted to seek the garden enjoyment of the Yang Un-geo etc., in the head house(宗宅) of Namwonyang's family and Jongho in Sunchang Gumiri through literature and field research. Admirers of Jongho were "six old Taoist hermit", including Cholo(楚老) Yang Un-geo(楊雲擧, 1613-1672) and Yangjindang Haman-ri, the author of Jongho-palgyeong, who was very close friends of Yang, as well as his son-in-law or out-law. Jonghojeong Pavilion, overland rock and nearby Takyeongjeong, which were built around a stone island shaped like a helmet, and a pool along the river, are known as 'Imcheonwonrim(林泉園林)' as the center of the custom that was conducted based on head house, which is up to 2km away from Jongho. Jongho-palgyeong is found to share the characteristics of Jeongja Palgyeong, which is based on Jonghoam, overland and Takyeongjeong, and the characteristics of the town's township of Namwonyang, Gumi-ri. The number of rock letters identified by the Mansutan members is a total of nine points, which clearly indicates that the scene was a scene where the custom of call to create poetry·fishing·playing musical instruments and drinking, as well as the scenery and landscape structure of the Jongho Palgyeong. Jongho Palgyeong, its customs and surrounding rock writing are highly suggestive and valid cultural views to remind or direct the old landscape of Mansutan Jongho and suggest to modern traditional landscapes as well as the "Noblesse oblige landscape enjoyment case."

• Korean Journal of Ichthyology
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• v.32 no.3
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• pp.148-159
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• 2020

This study investigated the seasonal and inter-annual changes in vertical distribution and size spectrum of walleye pollock, Gadus chalcogrammus inhabiting middle eastern coast of Korea (hear after pollock). Pollock was distributed between 50 m and 600 m depth range, and body size (total length) ranged from 16.6 cm to 81.5 cm. The trends of population body size were increased in autumn and winter and decreased in spring and summer. Vertical distribution of pollock showned depth-dependent patterns with distributing smaller individuals mainly in the upper layer (shallower depth), while larger fish in deeper habitats. Those patterns in vertical distribution of pollock population is probably due to be the results of energy-saving strategy, metabolic effects, and changes in prey selections according to pollock growth, derived from spatial and temporal changes in oceanic condition in habitat grounds. When water temperature in upper layer were increased and that of below thermocline depth became decreased in 2017, the ratio of smaller (<35 cm) and larger (≥35 cm) individuals was biased toward larger fishes, extending their distribution into shallow depth, and consequently main fishing ground was formed in far from coastal area. In addition, the ratio of smaller individual distributing between 100~300 m was increased with decreasing temperature gradient between below thermocline and bottom layer. Changes in spatial and temporal distributions of pollock population likely be related with vertical and horizontal changes in oceanic conditions and, consequently food supplies.