CE형 원전의 격납건물내 중성자선량 평가

김태욱,한재문,김경덕,윤철환,서장수,김영재,Kim Tae Wook,Han Jae Mun,Kim Kyung Doek,Yun Cheol Whan,Suh Jang Soo,Kim Young Jae 한국방사성폐기물학회 2005 방사성폐기물학회지 Vol.3 No.1

From measured results of the neutron fields at some principal places within the containment building in a CE type nuclear power plant in operation, the radiation exposure of a worker to the neutron at there was evaluated and the equivalent dose reflecting new recommendation (ICRP 60) was compared with that doing the old one (ICRP 26). The measured neutron field was also compared with calibration neutron field. From the analysis, the following conclusion was obtained: the average neutron radiation weighting factor according to new recommendation is 2.41 to 2.71 times higher than the old one. The average neutorn radiation weighting factor at the measured place was similar to that at calibration neutron field. The average neutron energy at measured place was between 42 and 158 keV and higher than that of calibration field of 500 keV. So, the measured equivalent dose in nuclear power plant could be overestimated compared to the real equivalent dose.

환경오염에 의한 위산지역의 삼림생태학적 변화에 관한 연구

김태욱,박인협,이경재 ( Tae Wook Kim,In Hyeop Park,Kyong Jae Lee ) 한국산림과학회 1982 한국산림과학회지 Vol.58 No.1

According to the distance from the industrial complex 5 sample plots were selected to study the changes of vegetational composition of the forest community caused by air pollution in Ulsan. Then 5 subplots were set within a plot. We considered that this gradient analysis by distance could be coincided with the gradual transition of plant succession. Number of species, number of individuals, species diversity, evenness increased and similarity index decreased with increasing distance from the industrial complex. Robinia pseudoacacia, Smilax china appeared to be tolerant to air pollution whereas Quercus variabilis, Q-aliena, Q. dentata and Albizzia julibrissin to be sensitive.

환경오염이 오동나무인공림의 물질생산에 미치는 영향에 관한 연구

김태욱,이경재,박인협 ( Tae Wook Kim,Kyong Jae Lee,In Hyeop Park ) 한국산림과학회 1982 한국산림과학회지 Vol.58 No.1

To study the comparison of aboveground biomass of paulownia coreana Uyeki of 6-year-old, located in Seongju of non-attacked forest and Ulsan of damaged forest by the air pollution were selected. Ten sample trees in Seongju district and seven trees in Ulsan selected taking account of DBH were measured for 16 trees in total within a 10 ×10m experimental plot. The diagram of oven-dry weight distribution of stem, branch and needle for each 1m segment was constructed. The logarithmic regression equations between dry weight of each component and the two-variables, DBH and tree height, combined term were presented. IF the estimations are extended to a hectare area stand, it contains 47.49 tons of aboveground biomass in Seongju district and 2.56 tons of it in Ulsan. The net assimilation was 4.73kg/kg/yr in Seongju and 2.29kg/kg/yr in Ulsan and the efficiency of leaf to produce stem was 2.99kg/kg/yr in Seongju and 0.83kg/kg/yr in Ulsan

무인 파라포일 시스템을 위한 바람 추정 기법 연구

김태욱,송용규,Kim, Tae-Wook,Song, Yong-Kyu 한국항공운항학회 2015 한국항공운항학회지 Vol.23 No.1

In this paper, a simple algorithm is proposed to estimate wind speed and direction which can significantly improve the landing performance of an unmanned parafoil. The proposed algorithm is applied to flight test data along with other known algorithms and the results are compared and discussed. The proposed algorithm shows comparable performance while it can still be applied to the parafoil under control.

사대공단 주변의 식생에 대한 연구

김태욱,김수인 ( Tae Wook Kim,Su In Kim ) 한국산림과학회 1982 한국산림과학회지 Vol.57 No.1

The present study was conducted during the period July 18-August 11, 1981, at the four industrial complexes(Pohangm Ulsan, Onsan, and Yeochon) using the naked eye method. The styd included the survey of plant species growing within a 2km from the area of pollution source, selection of plants tolerant to air pollution and effects of pollution on their growth. The results obtained are as follows; 1) Vascular plants surveyed as to industrial complexes consist of 90 families, 6 subfamilies, 213 genera and 290 species. Major plant families and species for each area are as follows: 1) Pohang area: 54 families, 102 genera and 126 species Leguminosae(12) Graminae(11), Compositae(9) Rosaceas(9) 2) Ulsan area : 61 families, 131 genera, and 158 species compositae(17) gramineae(16) Leguminosae(15) Rosaceae(9) Polygonaceae(9) Solanaceae(6) 3) Onsan area : 46 families, 98 genera, and 158 species compositae(12) Gramineae(12), Leguminosae)12) Rosaceae(6) Polygonaceae(6) 4) Yeochon: 71 families, 150 genera, and 188 speices Rosaceae(15) Leguminosae(15) compositae(14) graminese(14) Polygonaceae(8) Salicaceae(6), 2. Table 1 shows tolerant plants to air pollution in this study. 3. The following plants may be recommended as planting species at the industrial comples area Leguminosae: Amorpha fruticosa L. Lespedeza bicolor Turcz. Lespedeza maximowiczii Schneider Robinia pseudoacacia L. Sophora japonica L Fagaceae: Quercus acutissima Carr. Quercus serrata Thunb. Quercus variabilis Bl. Salicaceae: Populus tomentiglandulosa T. Lee Salix Pseudo-lasiogyne Leveille Oleaceae : Ligustrum Japonicum Thunb. Ligustrum Obtusifolumn S. et Z. Betulaceae: Alnus hirsuta (Space) Ruprecht Celastraceae: Euonymus japonicus thunb. Cparifolicceae: Viburnum awabucki K. Koch. Pinaceae: Cedrus deodara Loundon

양측성 성대 마비의 치료 원칙

김태욱,손영익,Kim, Tae-Wook,Son, Young-Ik 대한후두음성언어의학회 2009 대한후두음성언어의학회지 Vol.20 No.2

Bilateral vocal fold immobility (BVFI) is a challenging condition which may result from diverse etiologies including vocal fold paralysis, synkinesis, cricoarytenoid joint fixation, and interarytenoid scar. Most patients present with dyspnea and stridor, but sometimes with a breathy dysphonia. Careful history taking, laryngoscopic evaluation under general anesthesia or awaken status, laryngeal EMG, and imaging studies with CT and/or MRI are helpful for providing a precise diagnosis and planning appropriate managements. In children, congenital neurological disorder is one of the most common etiologies, and spontaneous recovery has been reported in more than 50% of cases. Therefore, observation for more than 6 months while securing the upper airway with tracheostomy if needed is a generally accepted rule before deciding any destructive procedure to be undertaken. In children with advanced posterior glottic stenosis, laryngotracheal reconstruction with rib cartilage graft should be considered. In contrast to children, BVFI most commonly occurs as sequalae of surgical complication in adults. Diverse static or dynamic procedures can be applied; posterior cordotomy, vocal fold lateralization, endoscopic or open arytenoidectomy, arytenoid abduction, and reinnervation, electrical laryngeal pacing, which need to be carefully selected according to each patient's needs and pathophysiology of BVFI.

불완전 성대 마비: 논란과 합의

김태욱,손영익,Kim, Tae-Wook,Son, Young-Ik 대한후두음성언어의학회 2010 대한후두음성언어의학회지 Vol.21 No.1

Mild vocal fold hypomobility is a common finding of which clinical significance is incompletely understood. Recently, electrophysiologic investigations have shown that vocal fold hypomobility is a continuum of neurogenic dysfunction ; partial denervation (paresis), complete denervation (paralysis), and variable degrees and patterns of reinnervation. Despite a sound pathophysiological basis for its existence, interest in and acceptance of the diagnosis of vocal fold paresis is relatively recent. Vocal fold paresis may be a relatively common and often overlooked condition that can be difficult to diagnose since laryngoscopy does not reliably distinguish innocent laryngeal asymmetry from hypomobility caused by paresis. Although not entirely free from error, laryngeal electromyography seems to hold more promise as a means of reliable diagnosis than laryngoscopy, and should be employed systematically in the evaluation of suspected paresis. The means to help most patients with paresis already exists in the repertoire of interventions developed to treat paralysis. However, since the vocal fold retains substantial movement, more conservative treatment strategy is recommended as a first line of treatment. The authors reviewed the representative reports of vocal fold paresis and summarized the controversies and consensus regarding the vocal fold paresis.

효율적인 전자문서 관리를 위한 난수 재배열 기반의 키 관리 방법을 이용한 암호화 기법에 관한 연구

김태욱,성경상,김정재,민병묵,오해석,Kim, Tae-Wook,Sung, Kyung-Sang,Kim, Jung-Jae,Min, Byoung-Muk,Oh, Hae-Seok 한국정보처리학회 2009 정보처리학회논문지 C : 정보통신,정보보안 Vol.16 No.5

전자문서의 많은 이점이 있음에도 불구하고 무단 유출, 파괴, 분실, 훼손의 위험이 상존하고 있다. 불법위조, 변조, 멸실로 부터 전자문서를 보호하기 위한 기술들이 절실히 요구되고 있다. 전자문서를 대상으로 하는 다양한 보안 기술들이 개발되어 있으나, 대부분 위 변조 및 부인 방지에 치중되어 있다. 본 논문에서는 기존 전자문서 관리시스템에 적용하고 있는 암호화 기술의 문제점을 제시하고, 전자문서 보호를 위한 암호화 알고리즘의 효율적 적용 방안을 통해 문제를 개선하고자 한다. 논문에서 제안하는 난수 재배열 방법을 이용한 키 관리 방안을 적용한 암호화 방식과 기존 전자문서 암호화 시스템과의 비교법에 의한 성능평가를 위해 중요 요소들을 비교 평가 수행하였으며, 안정성과 효율성 두 가지 측면에서 개선된 결과를 얻을 수 있었다. With all merits of electronic documents, there exist threats to the security such as illegal outflow, destroying, loss, distortion, etc. The techniques to protect the electronic documents against illegal forgery, alteration, removal are strongly requested. Even though various security technologies have been developed for electronic documents, most of them are emphasized to prevention of forgery or repudiation. This paper presents some problems in cryptography technologies currently used in the existing electronic document systems, and offer efficient methods to adopt cryptography algorithms to improve and secure the electronic document systems. To validate performance of the proposed random rearrangement method comparing with the existing cryptographies, basic elements have been compared, and it has been proved that the proposed method gives better results both in security and efficiency.

섬유다발의 수지의 함침에 있어서의 압력의 영향에 관한 연구

김태욱,전의진,엄문광,이우일 ( Tae Wook Kim,Eui Jin Jun,Moon Kwang Um,Woo Il Lee ) 한국복합재료학회 1988 Composites research Vol.1 No.1

대기오염이 곰솔림의 (林) 물질생산에 미치는 영향

김태욱,이경재,박인협 ( Tae Wook Kim,Kyong Jae Lee,In Hyeop Park ) 한국산림과학회 1985 한국산림과학회지 Vol.71 No.1

This study was performed to investigate the damage to the primary production of Pinus thunbergii forest from air pollution around the Yeochon Industrial Estate. The data were observed at 6 sites in the vicinity of the above area. The vitality of pine trees and the accumulation of the soluable sulfur and the fluorine were analyzed. Their value was generally increased near the source of air pollutants. The biomass density and annual net production were 1.01 ㎏/㎥, 5.90 t/㏊/yr in the stand 4 respectively and 0.66 ㎏/㎥ , 0.32t/hr/hr in the stand 3 respectively. The net assimilation rate was 0.4 - 1.6 ㎏/㎏/yr and the efficiency of leaf to produce stem was 0.3 - 1.3 ㎏/㎏/yr. The annual growth percentage of volume was 16.0% at the slightly damaged area and 4.0% at the Beverly damaged area. The maximum mean annual increment per tree was 0.0040㎥ and 0.0008㎥ in same order.