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박대영 한국통신학회 2008 정보와 통신 Vol.25 No.5
기지국이 셀 내에 있는 여러 사용자에게 신호를 전송하는 하향링크에서 셀 전체 채널 용량을 달성하기 위해서는 채널 상태가 가장 좋은 사용자에게만 전송해야 한다. 무선 페이딩 채널에서 여러 사용자 중에 채널이 좋은 사용자를 선택하면, 다중 사용자 다이버시티 이득을 얻을 수 있다. 본고에서는 이런 다중 사용자 다이버시티를 얻으면서도 사용자 간에 공평하게 자원을 할당하는 여러 방식에 대해서 알아본다.
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박대영 한국고고학회 2025 한국고고학보 Vol.- No.134
This study undertakes an analysis of iron weapons, which are believed to have been the main weapons of the time, and compares them against supplementary sources such as ethnographies, paintings, and literature to obtain a more concrete understanding of ‘war’, which was an important event in the process of political reorganization in Jinhan (辰韓). In Stage I, the emergence period, iron weapons were produced mainly in the Daegu region. However, the insufficient nature of archaeological data indicating tension and conflict among communities makes it difficult to ascertain the specific war methods that would have been employed. Nevertheless, it is plausible that ‘ritual war’ or ‘symbolic war’, as evidenced in ethnographic examples, may have taken place. In Stage II, the proliferation period, iron weapons were buried in various locations, and personal armaments reached a point where it was feasible for individuals to arm themselves. Furthermore, a weapons system centered on iron spears was established. Consequently, military units composed of spearmen were organized, and close combat, such as that depicted on the bronze wares of the Warring States Period, transformed into ‘war’. In Stage III, the period of diversification, there was a notable increase in the concentration of iron weapons on the southeastern coast. Additionally, the practice of burying iron arrowheads in bundles reached a point where it could be considered a form of mass armament. As weapons were improved and developed, the scale of ‘war’ increased, and the aspects of close combat intensified. In responseto this growing complexity of ‘war’, communities that recognized the importance of pre-emptive strikes may have developed archers into organized units and employed shooting tactics, as evidenced by the relief sculptures of the Han Dynasty. These changes are also reflected in Sanguozhi (三國志) and Samguk sagi (三國史記). The advanced artifacts and war systems brought by the immigrantsof Qin (秦) and Han (漢) were an important trigger for the changes to ‘war’. The articles relating to the subjugation of smaller polities by Saro-guk (斯盧國) indicate that aspects of war had become more intense.
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Analysis of Using Calcium Hydroxide to Disinfect Animal Farm and Eradicate Harmful Pathogens
박대영,김종천,김동현,최원식 사단법인 미래융합기술연구학회 2020 아시아태평양융합연구교류논문지 Vol.6 No.5
In intensive animal farming, which is preferred for economic reasons, a single case of infection of contagious diseases like swine fever requires massive culling of livestock on the farm or on the premises and distant farms as well. This study aimed to disinfect organic pathogens and harmful bacteria on the farm and to prevent seasonal contagious diseases. It also analyzed harmful pathogens that arose from corrosion in groundwater supply in order to boost immune system of animals. Based on the findings, disinfection of harmful pathogens on the farm decreased the resistance of microorganisms. This study drew the result of creating prevention for contagious diseases like swine fever just in short time by improving the immune system of the livestock to the harmful pathogen and bacteria through sterilizing the animal farm with calcium hydroxide.
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香砂平胃散 및 當歸活血湯이 膽道結紮과 Dimethylnitrosamine으로 誘發된 白鼠의 肝硬變症에 미치는 影響
박대영,姜秉淇 圓光大學校 韓醫學硏究所 1995 원광한의학 Vol.5 No.1
This study was to investigate the protective and anticirrhotic effects of Hyangsapyungwuisan and Dangguishalheoltang on the liver cirrhosis or fibrosis induced by prolonged bile duct ligation; a new experimental model for cirrhosis and the intraperitoneal injection of dimethylnitrosamine in the rat. The development of fibrosis or cirrhosis and its inhibition by the two prescriptions were examined by the chemical analysis of AST, ALT, and hydroxyproline, and histological and immunohistochemical observations. The results obtained were as follows. 1. The increase of serum asparate aminotransferase induced by bile duct ligation was inhibited by the administration of Hyangsapyungwuisan and Dnagguiwhalheoltang, especially markedly inhibited in the group of Dangguiwhalheoltang administration. 2. The increase of serum alanine aminotransferase induced by bile duct ligation in rats was inhibited by the administration of Hyangsapyungwuisan and Dangguiwhalheoltang, especially markedly inhibited in the group of Dangguiwhalheoltang administration. In conclusion, the increass of AST, ALT induced by bile duct ligation was efficiently decreased by the administration of Dangguiwhalheoltang extract. 3. The increased level of serum AST and ALT induced by the intraperitoneal injection of dimethylnitrosamine was inhibited by the administration of Hyangsapyungwuisan and Dangguiwhalheoltang extract. But there was no significant differences in the inhibition rate. 4. The incerasing level of hydroxyproline volume in the damaged lever tissues in rat were decreased by the oral administgration of Hyangsapyungwuisan and Dangguiwhalheoltang extract. But there was no significant differences in the inhibition rate between the two experimental groups. 5. The histological observation the damaged liver tissue and immunohistochemical observation of bromodeoxyuridine in the liver tissue of rats showed the significantly hepatoprotective effects of Hyangsapyungwuisan and Dangguiwhalheoltang extract, and resealed the regenerative effects of Hyangsapyungwuisan and Danggui- whalhioltang etract on the damaged liver induced by bile duct ligation and the i.p.injection of dimethylnitrosamine.
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초음파진행 시간차에 의한 STUD[BOLT] 나사산의 미세한 결함검출
서동만,김종교,박대영 한국비파괴검사학회 1990 한국비파괴검사학회지 Vol.10 No.1
It is difficult to detect such flaws as stress-corrosion cracking or corrosion wastage(loss of bolt diameter) in the threads. In many cases the critical size of a flaw is very small(1-2 mm order). This paper describes how it is possible to discriminate small flaw indications in threads using the time difference of thread signals[TDTS] by a signal-conditioning technique.
ScienceON
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