• Structural Engineering and Mechanics
• /
• v.84 no.1
• /
• pp.63-76
• /
• 2022

Major engineering requirements and technological developments in the steel construction industry are discussed to support a new innovative system, namely corrugated web beams, for future structural projections. These new-generation steel beams, fabricated as welded plate girders with corrugated webs, are designed to combine large spans with very low weight. In the present study, the flexural capacity of optimally designed trapezoidal and sinusoidal corrugated web beams was aimed at. For this purpose, the new metaheuristic methods, specifically hunting search and firefly algorithms, were used for the minimum weight design of both beams according to the rules of Eurocode EN 1193 15 and DASt-Ri 015. In addition, the strengthening effects of the corrugation geometry at the web posts on the load capacity of fabricated steel beams were tested in a reaction frame. The experimental tests displayed that the lateral capacity of trapezoidal web beams is more durable under flexural loads compared to sinusoidal web beams. These thin-walled beams were also simulated using a 3-D finite element model with plane strain to validate test results and describe the effectiveness of the ABAQUS software.

• Proceedings of the National Institute of Ecology of the Republic of Korea
• /
• v.3 no.1
• /
• pp.1-6
• /
• 2022

Among the 13 species of otters in the world, only one Eurasian otter (Lutra lutra) is found in South Korea. In the Korean Peninsula, otter pelts were historically valuable and expensive commodities used for international trade, and otters have long been poached as hunting animals. Recent rapid economic development in South Korea has increased habitat fragmentation and loss, creating a continuing threat to the natural environment. Otters live only in the area of rivers and streams as a family group and are territorial (linear habitat). Due to these limited conditions of otter habitat, the population size of otter is lower than that of onshore mammals. According to recent research, DNA analyses using microsatellite markers have shown that only approximately 7-21 otter individuals inhabit river systems for a length of 50-230 km. Korea's urban streams are associated with many threats that hinder otters from inhabiting them. Many areas around the urban streams are surrounded by high concrete riverbanks, and the risk of roadkill is also high. Nevertheless, ecological restoration projects in the urban rivers will contribute greatly to the stable inhabitation of otters. Detailed otter conservation strategies, such as the elimination of threat factors, improvement of habitat environment, and restoration of food resources and shelter, will provide a positive restoration effect on otter and river ecosystems as well.

• Journal of Fashion Business
• /
• v.27 no.2
• /
• pp.1-25
• /
• 2023

Taq-i Bustan rock reliefs are relatively well preserved among Sassanid relics. They are considered concrete and empirically important materials for studying Sassanian culture. In these rock reliefs, inauguration of various kings and hunting scenes are depicted. Thus, kings' attire and life of the court could be discerned according to eras. The purpose of this study was to investigate Sassanian clothing styles of various social positions by analyzing their clothing depicted in rock reliefs and to improve comprehension of the culture of the Sassanian Dynasty. Methodically, literature studies and artifacts were analyzed in parallel. Data of these two insources were consolidated for comparison. Results of this study are as follows. Since the Sassanian Dynasty succeeded the Parthian Dynasty, the Parthian style of clothing pieces such as tunic and trousers appeared in their attire. Basic types of tunics and trousers did not vary according to social status or age. However, details showed differences in those aspects. In the early Sassanian Dynasty, the dressing style of Rome was adopted. Styles of tunic and trousers featured draperies with many wrinkles and shoes were worn instead of boots. Trousers were tied with laces at ankles and laces were decorated with round clasps, imitating the style used by Kushan kings to the east of Sasanians. External cultural elements were also present in costumes of the Sassanian Dynasty, which played a bridging role for cultural exchanges between Eastern and Western civilizations at the gateway of the Silk Road.

• Proceedings of the Korean Society of Computer Information Conference
• /
• 2022.01a
• /
• pp.9-10
• /
• 2022

본 논문에서는 딥러닝을 활용하여 취업준비생들의 데이터에 의하여 취업 가능 여부와 그에 따른 유용한 정보들을 얻기 위한 시스템을 제안한다. 취업 가능성이 성공적으로 평가된다면 예비 사회인, 취업준비생, 대학생들이 미리 취업 준비가 어느 정도 이루어졌는지 본인의 위치를 평가할 수 있으며 강점과 약점을 파악할 수 있을 것이다. 본 연구를 위해 취업생 및 취업준비생 데이터를 포함하는 CSV파일을 생성하였고, 딥러닝을 활용하여 유용한 정보들을 추출해내는데 성공했다. 이를 통해 취업 가능성 예측 프로그램은 취업준비생들과 기업의 인사관리자들에게 커다란 이점을 제공할 수 있을 것으로 보인다. 더 나아가 이 프로그램은 기업 구성원들의 업무능력을 평가할 수 있는 프로그램으로도 활용할 수 있을 것으로 사료된다.

• Journal of Navigation and Port Research
• /
• v.32 no.1
• /
• pp.89-95
• /
• 2008

Foreign maritime officers were employed in Korean flag ocean-going merchant ships since the year of 2005. And the number of foreign maritime officers in Korean ship has been rapidly increased, and it approaches 700 recently. The shortage of Korean maritime officers was mainly claimed the reason of employing foreign maritime officers in Korean flag ship. In this paper, we surveyed the number of newly supplied officers from every Korean training institution, the number of officers on-board, on-leave, on-job hunting, and the number of officers leaving their job every year. And then we analysed supply-demand situation of Korean maritime officers for Korean flag ocean-going ships for reasonable decision-making in relation with employing foreign maritime officers.

• The Research Journal of the Costume Culture
• /
• v.20 no.4
• /
• pp.560-572
• /
• 2012

This study examines the influence of fashion accessories on how men of different ages are perceived, as well as how the social values of the perceiver affect the image evaluation process. For the purpose of this study, men's accessories were limited to glasses, ties, and hats. A quasi-experiment was conducted in which 358 female university students in Seoul examined two men, one in his 30s and the other in his 60s. The social value included materialism and hedonism with higher and lower group. Factor analysis revealed three main factors with regard to men's image based on age and accessories: professionalism, morality, and preference. The findings indicated that wearing accessories can affect how men are perceived, and the perceivers' social values are at play throughout the process. Glasses enhanced a professional image in men, while ties amplified professionalism and morality. Morality and preference for the older man were heightened when he wore a fedora and a hunting cap. Taking social values into account, perceivers with a higher level of materialism associated a man with a navy blue tie more strongly with professionalism. Perceivers who possessed more hedonistic traits preferred a man wearing a cap. The subjects considered the man in his 60s as having a higher level of professionalism when he wore casual hats such as a cap or a cloche. The results of this study suggest that social values such as materialism and hedonism play a part in how people perceive men wearing accessories.

• Asian-Australasian Journal of Animal Sciences
• /
• v.12 no.5
• /
• pp.815-836
• /
• 1999

The role of animal agriculture for the quality of human life has always been emphasized during 20th century and it is expected to be even more important in terms of food supplies and in providing additional functions in the future. The world human population has almost tripled during a period of half century. The world population of animals has increased 2~3 times (6 times for chicken) during the last 60 years, and the total amount of livestock products has increased 5~6 times (more than 10 times in pork) with higher annual growth rate (9%) in developing countries. Increased personal income certainly encouraged demand for animal products over grains and lower animal production costs resulted from scientific and technological advances. Similarly the production of total grains has more than doubled owing to the advances in agricultural science during the later part of the 20th century. The average life span of world people in 1950s was only 46 years, which will be increased to almost 66 years in the year 2000. Present date clearly indicate that the life span of people is proportional to their income (GNP) and/or animal protein intake. Animals can provide other resources than foods. The increase of human population indicates that the number of animals as well as per capita consumption of animal products will be increased in the 21st century. The other resources we get from animals are drafts, packing, riding, hunting and herding. Guiding the blind, protection and companionship are also examples of what we can expect from animals. In the very near future, animals will become major donors of organs, skin and producers of drugs or special functional foods. It may be concluded that animals are very closely associated and related to the quality of human life, and they are expected to remain the same way in the 21st century.

• Journal of Environmental Health Sciences
• /
• v.31 no.3
• /
• pp.199-206
• /
• 2005

C. neoformans-associated cryptococcosis is primarily a disease of immunocompromised persons, has a world-wide distribution, and is often spread by pigeons in the urban environment. In contrast, C. gattii causes infection in normal hosts, has only been described in tropical and semi-tropical areas of the world, and has a unique niche in river gum Eucalyptus trees. Cryptococcosis is acquired through inhalation of the yeast propagules from the environment. C. gattii has been identified as the cause of an emerging infectious disease centered on Vancouver Island, British Columbia, Canada. No cases of C. gattii-disease were diagnosed prior to 1999; the current incidence rate is 36 cases per million population. A search was initiated in 2001 to find the ecological niche of this basidiomycetous yeast. C. gattii was found in the environment in treed areas of Vancouver Island. The highest percentage of colonized-tree clusters were found around central Vancouver Island, with decreasing rates of colonization to the north and south. Climate, soil and vegetation cover of this area, called the Coastal Douglas fir biogeoclimatic zone, is unique to British Columbia and Canada. The concentration of airborne C. gattii was highest in the dry summer months, and lowest during late fall, winter, and early spring, months which have heavy rainfall. The study of the emerging colonization of this organism and subsequent cases of environmentally acquired disease will be informative in planning public health management of new routes of exposure to exotic agents in areas impacted by changing climate and land use patterns.

• Journal of the Korean Society of Costume
• /
• v.60 no.7
• /
• pp.117-130
• /
• 2010

The four walls of mural paintings in Afrasiab, Samarkand, have discovered: the indian-concept east wall, the west with the paintings of envoys from a number of countries bringing in King's letters or gifts, the south describing traditional ceremony celebrating the new year, the north with a picture of a Chinese princess on board beside hunting scenes. Overall, Sogdians in Afrasiab mural paintings of 7th century had following costume codes: a very short haircut or the Turkic queue, a rather-narrow-sleeved caftan with round-neck, a belt and boots. The west wall showed various costume style of a set of envoys from countries. First, a Turkic envoy had 3-6 rows of long plaits, wearing a caftan with two lapels and a belt - interestingly, Sogdian and Turkic nobles didn't wear pochettes. Second, a Chaganiyan had a hairband on his short hair, and his colorful round-neck caftan is decorated with animal-patterned medallions and a golden belt. Third, a Chach wore a jewelled hairband, putting gaiters on his pants. Forth, a Chinese was in putou with a round-neck caftan, and with a belt and sword around his waist. Lastly, also appeared a Koguryo envoy in white putou with a double-bird-feathered crown on top, wearing a long-sleeved yellow v-neck top, a belt, narrow-cuffed pants and boots. Identical to the Sogdian statues excavated in various regions of China are the appearance of big eyes and nose -similar to the warrior stone in Korea- a hairband, and a pochette down from the waist line. During this period, white and red were considered as prevailing colors for clothing: red and yellow among Turks. The costumes of characters in Afrasiab mural paintings were preferably made with the animal-patterned, sophiscated samite Zandanachi of Sogdiana.

• Journal of Wetlands Research
• /
• v.10 no.2
• /
• pp.179-189
• /
• 2008

Fauna of Shinpo nuclear powerplant site were surveyed during Feb 27-Mar 4, 2003 as a part of ecological environmental survey. This area is well dominated by coniferous trees (Pinus densiflora) aging 15-50 years. In the shoreline black pine (P. thungergii) is the dominant species and was planted for wind protection. Around Shinpo areas inside 50 km in radius was found 170 bird species (18 orders, 40 families) were recorded. Natural monument in the areas were included white-stork(Cygonia boyciana) estimated 8 species of birds. Although the habitat of Shinpo area is deteriorated due to deforestation, illegal hunting, etc. the fauna seems to be rich in species. Despite the sudden halt of KEDO(Korea Peninsula Energy Development Organization) project the conservation efforts and continuous monitoring are required considering a continuation of the project.