• Journal of the Korean Vacuum Society
• /
• v.17 no.5
• /
• pp.375-380
• /
• 2008

We have investigated the low-dimensional nanostructures produced by adsorption of triangular Co coplexed dipyrromethane(DPM-trimer, Fig. 1) on graphite surface by using scanning tunneling microscope. DPM-trimer deposition on the graphite surface leads to the formation of long 1-D molecular wires and 2-D hexagonal patterns. We analyzed the heights and structures of 1-D molecular wires and 2-D hexagonal patterns. The 1-D molecular wires were formed 'edge-on' alignments on graphite surface result of continuos $\pi-\pi$ stacking interactions. The other case of 2-D hexagonal patterns were formed 'face-on' alignments on graphite surface.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
• /
• 2015.10a
• /
• pp.296-299
• /
• 2015

Marine disaster, such as 'Dolphin Lake ship', "the Sewol ferry', on the ocean needs emergency communication with land post and Rescue services. It needs of emergency communication system has increased in Republic of Korea peninsula with the sea on three side. The system will be more fully equipped to deal with disasters linked to communication so alone sailing ship is at sea. Research is needed on communication links to submarines operated by submarine to sink a ship, as well as immersion in the sea with. And it is necessary in the study of the land in preparation for the emergency disaster ship and submarine communication links for offshore and subsea oil and associated communication systems. Will be studied in preparation for the communication protocols and emergency and disaster location and land the plane or for a career in the satellite systems are linked through this.

• Journal of fish pathology
• /
• v.26 no.3
• /
• pp.289-294
• /
• 2013

Enterococcus faecium was isolated from the internal organs of the rough-toothed dolphine, Steno bredanensis which was stranded at Jeju island. E. faecium were isolated from the liver, spleen, kidney, heart and lung up to $1.54{\times}10^6$ cfu/g. No significant differences of bacterial enzyme activities between E. faecium KCCM 12118 and the isolates were found. Biochemical constellation was the same or similar to that of E. faecium KCCM 12118 according to API20 strep. All isolates had the multi-drug resistance to 6 antibiotics by an agar disk diffusion method but these isolates didn't have resistance to chloramphenicol and vancomycin.

• The korean journal of orthodontics
• /
• v.49 no.2
• /
• pp.81-88
• /
• 2019

Objective: The aim was to assess the intraobserver and interobserver reliabilities of temporomandibular joint linear measurements and condylar shape classifications performed with cone-beam computed tomography (CBCT). Methods: CBCT images of 30 patients were measured at two different time points by two orthodontists using the Dolphin 3D program (n = 60). Anterior, posterior, and superior joint space measurements and sagittal joint morphology classification in the sagittal view and medial and lateral joint space and mediolateral width measurements and coronal joint morphology classification in the coronal view were recorded. Intraclass-interclass correlation coefficients (ICC) and kappa statistics were used to assess intraobserver and interobserver reliability for the measurements and morphology classifications, respectively. Results: The ICC values were good for measurements of the posterior joint space by observer I and for measurements of the posterior, medial, and lateral joint spaces by observer II, while the other intraobserver measurements were excellent. Only the mediolateral width measurements showed excellent interobserver ICC values, while the other measurements showed good interobserver ICC values. Intraobserver agreement for the sagittal morphology classifications was moderate (${\kappa}=0.479$) and almost perfect (${\kappa}=0.858$) for observers I and II, respectively, while the corresponding agreement for the coronal morphology classifications was substantial for both observers. The interobserver agreement values for sagittal and coronal morphology classifications were slight (${\kappa}=0.181$) and fair (${\kappa}=0.265$), respectively. Conclusions: Linear temporomandibular joint measurements were reproducible and reliable in both intraobserver and interobserver evaluations. However, interobserver agreement for assessments of condylar shape was low.

• The Journal of the Acoustical Society of Korea
• /
• v.41 no.2
• /
• pp.227-234
• /
• 2022

Covert Underwater Communication (CUC) signals should not be detected by other unintended users. Similar to the method used in Radio Frequency (RF), covert communication technique sending information underwater is designed in consideration of the characteristics of Low Probability of Detection (LPD) and Low Probability of Intercept (LPI). These conventional methods, however, are difficult to be used in the underwater communications because of the narrow frequency bandwidth. Unlike the conventional methods of reducing transmission power or increasing the modulation bandwidth, a method of mimicking the acoustic signal of an underwater mammal is being studied. The biomimetic underwater acoustic communication mainly mimics the click or whistle sound produced by dolphin or whale. This paper investigates biomimetic communication method and introduces research trends to understand the potential for the development of such biomimetic covert underwater acoustic communication and future research areas.

• Journal of Wellbeing Management and Applied Psychology
• /
• v.5 no.4
• /
• pp.39-50
• /
• 2022

Purpose: Odor generated in traditional markets causes discomfort, hindering the pleasant life of residents, and complaints of odors are steadily increasing every year. Odor is defined as a smell that stimulates a person's sense of smell by stimulating hydrogen sulfide, mercaptans, amines, and other irritating gaseous substances. Research design, data and methodology: It is not easy to grasp and manage the current status of the odor analysis of living odors such as traditional markets. Seongnam City has an advanced new town of Bundang and Pangyo, while old cities such as Sujeong-gu are relatively underdeveloped. Results: As a result, the gap between the old city center and the new city center widens, so it is urgent to develop a balanced development. Based on this, the market of Seongnam-si is divided into the old city center and the new city center, and the odor complaint in the traditional market is analyzed to find a solution. A survey was conducted to understand the current status of odor management in the Seongnam-si market and the odor felt by users. Moran Market, Seongnam Jungang Market, and Kumho Market and Dolphin Market, located in the new city center, were selected as targets. The items of the survey consisted of the frequency and cause of the odor, the current status of market management, matters that need improvement, and efforts to resolve the odor. Conclusions: Therefore, this study aims to help citizens feel better about odor environment in places where odor standards are exceeded or complaints occur frequently, and to help local governments and market merchants establish more efficient and useful development plans.

• Journal of the Korean Society of Fisheries and Ocean Technology
• /
• v.59 no.4
• /
• pp.399-406
• /
• 2023

This study presents an analysis of bycatch data concerning Pacific white-sided dolphins (Lagenorhynchus obliquidens) along the Korean coast from 2016 to 2021. A total of 503 bycatches were examined, encompassing data on year, month, body length, sex, latitude (N), longitude (E), and fishing gear. Bycatch was the most frequent in waters with a longitude of less than 130°E, particularly in the southern coastal region at a latitude of 35.5°N, with a higher likelihood of bycatch in lower latitudes. Since 2017, a decreasing trend in bycatches has been observed. The sex distribution of bycaught dolphins showed a predominance of males (40%), followed by females (31%), with an unclassified category at 29%, though no statistically significant differences were found (p > 0.05). Seasonal analysis indicated that bycatch predominantly occurred during the winter months, with significant monthly variations (p < 0.01). Pacific white-sided dolphins were primarily ensnared in gill nets and, to a lesser extent, in stationary nets. Statistical analysis by gear type revealed a significant preference for gill nets (p < 0.001). Considering body length composition in relation to latitude, it is suggested that Pacific white-sided dolphins may utilize the southern waters of the East Sea as a potential nursery ground, though this was not confirmed at a significant level, emphasizing the need for further in-depth monitoring and ecological investigations. Given that there are approximately 27 different types of gill nets associated with the majority of bycatches, more detailed research is warranted to divide these gear types into finer subcategories for estimating bycatch relationships, ultimately leading to the development of effective conservation and management strategies.

• Korean Journal of Human Ecology
• /
• v.7 no.1
• /
• pp.33-41
• /
• 2004

The purpose of the study was to analyze in process of circulation market boiled whale meat's rancidity. oxidative rancidity is oil or fat food depend on oxygen in air oxidative change in quality. boiled whale meat faty come to oxidative rancidity food stability and hygiene reasons for people health poisonous point out, however it is not indication study of support. Accordingly confirm lead into circulation process boiled whale meat's rancidity examination and microorganism examination boiled whale meat's stability whether or not. The result obtained were summarized as follows: 1. Proximate percentage of boiled whale meat(pectoral, pelvic, fin, flank) of moisture and crude lipid and crude protein from samples shown to be : moisture was pectoral 16.4%, pelvic 36.2%, fin 46.2%, flank 19.2%, crude lipid was pectoral 54.1%, pelvic 42.8%, fin 15.8%, flank 40.6%,crude protein was pectoral 29.4%, pelvic 20.5%, fin 29.5%, flank 28.6%. 2. The fatty acid composition of total lipid were composed of pectoral 27.2%, pelvic 28.9%, fin 33.3%, flank 23.4% of oleic acid and pectoral 12.7%, pelvic 11.1%, fin 11.3%, flank 14.0% of palmitic acid pectoral 10.8%, pelvic 7.9%, fin 7.6%, flank 2.1% of docosahexaenoic acid, pectoral 14.2%, pelvic 7.5%, fin 1.9%, flank 7.2% of eicosenoic acid, pectoral 5.1%, pelvic 5.7%, fin 4.4%, flank 5.7% of myristic acid, 16: 0 11∼14 % of high saturated fatty acid. generally most of 18: 1ω9 of boiled whale meat's each portion, 22:6 7∼12%, 20:5 1∼14% of polyenoic fatty acid. 18:3 showen to be 1% make an expection of pectoral and fin portion the total lipid were most of netural lipid's about 90%, monoenic fatty acid were most of 19∼22% of saturated fatty acid, 77∼80% of monoenic fatty acid level of 47∼56% of 18:1 16:1 was markelly high to those of total lipid. 3. The storage number days variation of oxidation were shown to be by stages process favorably the past days of boiled whale meat's acid value for 5days. pectoral the day 0.1, five days 1.3, pelvic the day 0.1, five days 1.6, fin the day 0.3, five days 0.7, flank the day 0.2, five days 0.4. 4. The sealer and wrapper the storage number days variation of boiled whale meat oxidation for 7days were shown to be a stage of sealing, the temperature of a room, pectoral the day 0.1 seven days 0.6, pelvic the day 0.1, seven days 1.3, fin.

• Ocean policy research
• /
• v.33 no.2
• /
• pp.183-204
• /
• 2018

Whaling has been banned in Republic of Korea after the declaration of the moratorium on the commercial whaling by the International Whaling Commission (IWC) since 1986. Korean government followed the moratorium immediately. However whale meat market has been kept by the bycaught whales and dolphins. So Korean government established a rule to control and trace whale meat in the market in 2011. The rule has some loopholes to allow illegally taken whale meat smuggle into the market. This study investigates the flaws in the current rule and recommend the way to overcome that defects. The first step is to prevent the entry of the illegal whale meat into the market. Minor change of the current law would be a solution. The next measure is to increase the sampling rate of the whale DNA that allowed to distribute in the market. The DNA database would be a powerful tools to identify illegal whale meat which is existing in the market. Korean government is operating three kind of food traceability systems. However, because of the legal limitations and the opposition of the non-governmental animal rights organizations, it is difficult to include whale meat to the existing systems. So the last step is to establish a new Traceability System with a state-of-the-art IT technology like as blockchain. The three measures mentioned above would increase the transparency in the whale meat market and prevent the entry of the illegal products.