• Journal of Korean Neurosurgical Society
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• v.54 no.2
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• pp.142-144
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• 2013

A 49-year-old female with a history of several neurosurgical and otolaryngologic procedures for occipital meningioma and cerebrospinal fluid leaks was diagnosed with pneumocephalus after a one hour flight on a domestic jet airliner. Despite multiple operations, the air appeared to enter the cranium through a weak portion of the skull base due to the low atmospheric pressure in the cabin. The intracranial air was absorbed with conservative management. The patient was recommended not to fly before a definite diagnostic work up and a sealing procedure for the cerebrospinal fluid leak site had been performed. Recent advances in aviation technology have enabled many people to travel by air, including individuals with medical conditions. Low cabin pressure is not dangerous to healthy individuals; however, practicing consultant neurosurgeons should understand the cabin environment and prepare high risk patients for safe air travel.

• Proceedings of the Korea Concrete Institute Conference
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• 2003.05a
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• pp.35-40
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• 2003

Immense quantities of coal combustion by-products are produced every year, and only a small fraction of them are currently utilized. The purpose of this study is to investigate reused techniques of coal to highly economic growth and expansion of country base industry. So, in this study, artificial aggregate was developed to recycle coal ash by non-sintering technique and crush method. And characteristic of developed artificial aggregate was examined. Also, noise barriers using developed artificial aggregate was made by link of development of ECO-construction product and is preparing sound absorption and transmission loss experiment. Result of study was showed that artificial aggregate was more proper to use a noise barriers and this is expected to satisfy sound absorption standard in this study. So, if shape and color considering surround and design technology is studied continuously, it can be expected to make ECO-precast product as well as maximize waste recycling.

• The Plant Pathology Journal
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• v.17 no.3
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• pp.159-163
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• 2001

Influence of soil temperature [accumulated degree-day for the base temperature $5^{\circ}$($\textrm{DD}_5$)] on the development of Meloidogyne arenaria were studied in a winter grown oriental melon greenhouse in Seongju, Korea. Egg masses were first observed on roots at the accumulation of 565 $\textrm{DD}_5$(40 days after transplanting), suggesting that the nematode has completed the first generation in 40 days. Second-stage juveniles (J2) densities were lowest at 863 $\textrm{DD}_5$ in April, first increased at 1,334 $\textrm{DD}_5$ in May, peaked at 2,951 $\textrm{DD}_5$ in July, and decliner thereafter. Development of egg masses and J2 density in soil revealed that M. arenaria could develop in 7-8 generations in a year in the greenhouse. Degree-day monitoring, therefore, could aid to predict nematode development in soil and can be valuable tool a to develop root-knot nematode control strategies.

• Journal of Chest Surgery
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• v.26 no.12
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• pp.965-968
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• 1993

Primary benign tracheal tumors are exceedingly rare and leiomyoma has the least frequency among them. It is important to recognize early without misdiagnosis such as asthma because it is curable. A 41 year-old female was admitted for dyspnea and choking since November 1991. Under the impression of asthma, she received medication. Symptom was not improved and thus chest CT scan was performed. There was endotracheal tumor mass which was located just above the carina and arose from the right lateral tracheal wall with broad base. We successfully resected the tumor mass including trachea and the defected area of trachea was reconstructed with autologous graft using pericrdium & rib cartilage. During the follow up period, no complication was developed.

• Korean Journal of Veterinary Research
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• v.47 no.1
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• pp.99-102
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• 2007

A 3-year-old, intact female, Shih-tzu dog was presented with a 15-day history of vomiting,depression, and anorexia. On physical examination, systolic ejection murmurs with precordial thril atthe left heart base were detected. A diagnosis of congenital pulmonic stenosis (PS) was made mainlyfrom the thoracic radiography, electrocardiography, and echocardiography. On complete blood counts andconfirmed that main pulmonary artery was tremendously buldged and electrocardiography was suggestiveof severe right ventricular hypertrophy. Echocardiographic findings revealed the pulmonic valve stenosiscontaining valvular dysplasia and poststenotic dilation. On Doppler echocardiography, ejection velocityof the lesion accounted for 3.38 m/sec, meaning mild velocity through the stenotic area. The dog'sproblem and resulted in death. However, there has been no reliable relation between PS and CRF. Primarymalformation of pulmonic valve was confirmed at necropsy after death.

• Journal of the Korean Society for Aviation and Aeronautics
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• v.28 no.1
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• pp.66-74
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• 2020

With the development of the aviation industry in Korea, the number of aircrafts has increased every year. About 10 flight departments have been established at domestic universities, and flight training is conducted until the course of commercial pilot certificate. In addition, private aviation institutes using Muan airport as a base have also increased, and the number of training aircrafts in the eastern and western regions of Jeonnam region has increased dramatically. Along with an increase in the number of training aircrafts, aviation accidents have also increased. From April 2018 to September 2019, 11 accidents occurred at Muan airport and Yeosu airport. This study aims to develop a pre-flight safety protocol to promote flight training safety. Three aspects-including technical factors, human factors, and organizational factors-were considered in this study.

• Journal of Physiology & Pathology in Korean Medicine
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• v.21 no.2
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• pp.578-581
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• 2007

Moyamoya disease is characterized by the angiographic findings of bilateral occlusion of the distal portion of the internal carotid arteries with a vascular network at the base of the brain. The typical findings on conventional angiography and magnetic resonance imaging usually confirm the correct diagnosis of moyamoya disease. We experienced a 11-year-old girl with moyamoya disease showing repeated transient ischemic attacks and we report on this case with a review of the literature.

• Korean Journal of Veterinary Research
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• v.22 no.2
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• pp.247-251
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• 1982

A 6-year-old male German Shepherd was admitted to the Armed Forces Second Animal Clinic for clinical examination The symptoms were anorexia, dyspnea, emaciation and ascites. Treatment was given for a month but its condition did not improve, euthanasia was therefore performed and the dog was submitted for necropsy. A tumor was found at the base of the heart between the ascending aorta and the pulmonary artery It was diagnosed an aortic body tumor by clinical signs, gross lesions and histopathologic features.

• Korean Journal of Veterinary Research
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• v.32 no.4
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• pp.635-640
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• 1992

Two cases of lingual masses were observed among 500 Fischer 344 (F344) rats which were used as control and treated animals in a 2 year carcinogenicity study in Toxicology Research Center, Korea Research Institute of Chemical Technology. The masses grossly appeared as tan, pedunculated, fungiform on the dorsal aspect of the base of the tongues. They were approximately $1.5{\times}1.2{\times}0.3cm$ in size. The microscopic features consisted of acanthosis, hyperkeratosis, papillary projection with connective tissue cores and multifocal chronic active inflammation with hair shafts. The results observed support the epigenetic mechanism of tumorigenesis which is caused by Physical stimuli of foreign bodies. Both of the masses were diagnosed as papillomas with the incidence rate of 0.4%(1/250) in each sex on the basis of the gross and microscopic features.

• Proceedings of the KSR Conference
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• 2009.05a
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• pp.1139-1163
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• 2009

Since opening of the high speed railroad in Korea, service result of the last 5 years is commandable. About 236million passengers had taken KTX until February 2009, and number of trains in service per day during week-end increased from 128 to 181, meaning that it's grown about 40%. And MKBSF, one of indicators of the high speed railroad's reliability, registered 680,469Km at the end of the year 2008, witch is 6 times more than 121,000Km, contract base when KTX was introduced. With increasing number of trains in service, not only passengers use the high speed railroad more frequently, but also we assure its reliability through maintenance based on reliability. And actually we gather information concerning all kind of defects occurred during train circulation and then, analyse them, and eradicate their causes in order to improve the high speed railroad's reliability. This paper describes a verification test process to analyse causes of defective function about train's traction.