• Journal of Korean Society of Transportation
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• v.32 no.5
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• pp.531-543
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• 2014

Research on activity-based travel demand forecasting and activity-travel simulator has received an international attention for the last two decades. Ways to develop the activity-based simulator may be manifold. It is obvious that importing an existing simulator that has been proven internationally likely reduces the development cost and the risk of failure. By definition of the activity-based approach, however, the details of an activity-based simulator inevitably relies on particular social, economic and cultural characteristics of the society where the simulator is developed. When importing such a simulator from overseas, the researcher should be aware of the importance of tuning the system for the society to which the imported system is applied. There are many potential works on this, including for example the tuning of data structure that is likely different form of the original system. The authors are yet aware of certain research on those. The current paper aims to report the result of transforming the input data for applying the existing activity-travel simulator to Seoul. The paper first introduces FEATHERS that was developed in Belgium having Albatross which is the core of system. FEATHERS Seoul that is under development and modified version of the original FEATHERS is briefly described and the related problems are discussed. The paper then explored to resolve and to alleviate such problems.

• The Bulletin of The Korean Astronomical Society
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• v.46 no.1
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• pp.51.1-51.1
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• 2021

Spiral arms greatly affect gas flows and star formation in disk galaxies. We use local 3D simulations of vertically-stratified, self-gravitating, gaseous disks under a stellar spiral potential to study the effects of spiral arms on galactic star formation as well as formation of gaseous spurs/feathers. We adopt the TIGRESS framework to handle radiative heating and cooling, star formation, and ensuing supernova (SN) feedback. We find that more than 90% of star formation takes place inside spiral arms. The global star formation rate (SFR) in models with spiral arms is enhanced by less than a factor of 2 compared to the no-arm counterpart. This supports the picture that spiral arms do not trigger star formation but rather redistribute star-forming regions. Correlated SN feedback produces interarm feathers in both magnetized and unmagnetized models. These feathers live short, have parallel magnetic fields along their length, and are bounded by SN feedback in the lateral direction, in contrast to instability-induced feathers formed in our previous isothermal simulations.

• Korean Journal of Environment and Ecology
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• v.16 no.3
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• pp.233-238
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• 2002

In this study, we investigated the lead exposure conditions using feathers of pigeons as a monitor for lead pollution from rural (Duckjeok Island), central urban (Seoul), and industrial complex areas (Yochon, Ansan, Ulsan, and Busan) in Korea. The feathers were taken from breast body parts and their lead analysis was performed without washing the feathers to reflect lead particles attached to the surface. The tissue lead concentrations were also compared with levels of atmospheric concentrations. The lead levels in the feathers were increased when the atmospheric lead levels were higher, so that the lead levels in the feathers of the pigeons from the industrial complex area with highest atmospheric lead levels were about four times greater than those of the rural areas. A positive correlation was found between the lead concentration of the pigeon's livers and feathers in rural, and the Yochon industrial complex area with the lowest lead levels. This result means that most of lead in feathers is transported from body tissues during the molting period without attached atmospheric lead. Thus, the feather lead concentrations could be discussed in the light of the metabolism known to occur between the liver and feathers. However, there were not significant correlations in the other areas with higher atmospheric lead levels, and observed relatively higher lead accumulation ratio in feathers than in livers compared with rural and the Yochon industrial complex areas. It is therefore suggested that the former was more exposure conditions and mainly influenced by outer pollutant sources than by the metabolism as the latter.

• The Korean Journal of Ecology
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• v.26 no.3
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• pp.91-96
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• 2003

To monitor the heavy metal exposure conditions of Feral Pigeons Columba livia, we collected them at commercial area, industrial area, park area and resident area in Seoul. In feathers, iron concentrations were significantly different among habitats(ANOVA, p<0.05), and were the highest at park area. Manganese concentrations were relatively higher at industrial and park area than other areas(ANOVA, p<0.05). In case of copper levels were the significantly highest at park area(ANOVA, p<0.05). Zinc, lead and cadmium had no difference among habitats. Correlation between livers and feathers concentrations were highly significant to copper(r²=0.983, p<0.01) and cadmium(r²=0.632, p<0.01), but iron, zinc, manganese and lead were not significantly different.

• Journal of Veterinary Clinics
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• v.34 no.5
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• pp.396-399
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• 2017

This is a case report of a northern goshawk (Accipiter gentilis), admitted to the wildlife rescue center with right coracoid and scapular fracture which received conservative treatment and was soft-released successfully. At the admission, the goshawk had callus formed on the fractured bones, scars on eyebrows and severely damaged tail feathers with inability to fly. Cage rest was indicated to prevent further occurrence of fracture and to promote reunion of the fracture surface. The bird went through a rehabilitation process with appropriate physical training in flying cage to recover its fitness and flying ability. Complete molting of flight feathers with damaged rectrices was achieved during the rehabilitation period and its flight ability was recovered favorably. It was released into a proper habitat for northern goshawks, but the bird was found near the aviary where its last phase of rehabilitation was performed. A soft-release program was applied and finally the bird returned to near the first rescue location 235 km away from the release site.

• Korean Journal of Veterinary Research
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• v.48 no.2
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• pp.161-165
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• 2008

Many neurotoxigenic clostridia are found in soil. Among animals, birds are especially susceptible to botulism, perhaps because they feed on insects, invertebrate carcasses, and decayed feeds contaminated with spores of Clostridium (C.) botulinum. C. botulinum type C is mainly involved in avian botulism. In the summer of 2005, death of a mute swan (cygnus olor) living in the pond of large bird cage was found in Seoul Grand Park Zoo. The birds presented presumptive clinical signs of botulism, such as ruffled hackle feathers, abnormal posture of the head, weakness, and flaccid paralysis. At that time, pond water in the breeding facilities was drained for 7 days, but there were still remained water containing sediment of feed and feces. Therefore, botulism was suspected and an experimentation were made to detect C. botulinum in the dead mute swan. Gross post-mortem findings of a mute swan showed jelly-like hemorrhagic contents in the intestine, sands and vegetations in the stomach. C. botulinum was isolated from the liver, small intestine and large intestine samples. Botulism was also confirmed by mouse inoculation test with the organ samples. With PCR, a gene encoding C. botulinum type C toxin was detected for the several organs of the mute swan died. These results suggested that death of mute swan was caused by C. botulinum type C.

• Journal of the Korean Society of Costume
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• v.58 no.3
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• pp.105-115
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• 2008

A Go-go-kwan is a particular hat which has worn by married woman in Mongol and Yuan dynasty in China. It is also widely called as a Boktak in Mongol. The Go-go-kwan, recorded in jip-sa and in the miniature painting of 14th century is the early type of go-go-kwan. Later type can be seen from the relic collections of Gyeonggi Provincial Museum in Korea. The Go-go-kwan is composed with three parts ; feather part, tube part and hat part. Among the feathers, the largest one is as long as four times of the length of the tube and the shortest one is half the length of the tube. The tube is made of light weight wood such as white birch or bamboo, and covered with silk. Some of the hats were made exactly to fit on the head whereas others were designed to wear on the head as like jobawi.

• Journal of Veterinary Clinics
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• v.18 no.1
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• pp.65-66
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• 2001

A 900 g seven-month-old female scarlet macaw was referred to Seoul National University Veterinary Medical Teaching Hospital with history of rupture of a crop. Formula leaking from the crop fistula onto the chest feathers was found. According to history taking, and physical examination, the avian was diagnosed as the burns on both right and left surface of the crop. After anesthetizing it with ketamine(50 mg/kg, IV), necrotic tissue of the skin and crop was excised. The crop wall and skin were closed in layer by layer. Metronidazole (50 mg/kg, sid, PO) was administered for 5 days postoperatively. The meal was given frequently with smaller amount. There has not been any digestive problem for 2 months after treatment.

• Journal of the Korean Home Economics Association
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• v.44 no.1 s.215
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• pp.151-157
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• 2006

Ten types of male headgear-Kwonwoonkwan, crown-like headgear, hats with a square flap, hats with feathers, crowns with plumes, Ballip, hats with flat crowns, Somo, turban, and fur hats-were described in Jip-Sah, which was published in the 14th century. Mongolian people used summer headgear, winter hats, and crown ornaments, which had been used until the Ch'ing dynasty of China. From the late 12th century to 1304, the headgear styles remained the same, suggesting that the Mongolian people kept their tradition. Kwonwoonkwan, crown-like headgear, and Somo, presented in Jip-Sah, were also described in U. Yadamsuren's album, a pictorial depiction of the 20th century Mongolian headgear.

• The Bulletin of The Korean Astronomical Society
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• v.40 no.1
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• pp.48.4-49
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• 2015

Stellar spiral arms and magnetic fields in disk galaxies are important in the formation of gaseous structures such as spurs/feathers and wiggles as well as in angular momentum transport between stars and gas. We present our recent results of global magnetohydrodynamic simulations to study nonlinear responses of self-gravitating and magnetized gas to an imposed stellar spiral potential. We vary the arm strength, the arm pattern speed, and magnetic field strength to explore various galactic situations. Magnetic fields not only reduce the peak density of galactic spiral shocks but also make angular momentum transport more efficient via magnetic pressure and tension forces. The extent and shapes of gaseous arms as well as the radial mass drift rate depend rather sensitively on the magnetic field strength. The wiggle instability apparent in unmagnetized models is suppressed with increasing magnetic field strength, while magnetic fields promote the development of magneto-Jeans instability of the arms and magnetic islands in between arms. We quantify the angular momentum transport by spiral shocks, focusing on the effects of magnetic fields. We also present physical interpretations of our numerical results and discuss astronomical implications of our findings.