This study investigates the microstructural properties of CoCrFeMnNi high entropy alloy (HEA) oxynitride thin film. The HEA oxynitride thin film is grown by the magnetron sputtering method using nitrogen and oxygen gases. The grown CoCrFeMnNi HEA film shows a microstructure with nanocrystalline regions of 5~20 nm in the amorphous region, which is confirmed by high-resolution transmission electron microscopy (HR-TEM). From the TEM electron diffraction pattern analysis crystal structure is determined to be a face centered cubic (FCC) structure with a lattice constant of 0.491 nm, which is larger than that of CoCrFeMnNi HEA. The HEA oxynitride film shows a single phase in which constituting elements are distributed homogeneously as confirmed by element mapping using a Cs-corrected scanning TEM (STEM). Mechanical properties of the CoCrFeMnNi HEA oxynitride thin film are addressed by a nano indentation method, and a hardness of 8.13 GPa and a Young’s modulus of 157.3 GPa are obtained. The observed high hardness value is thought to be the result of hardening due to the nanocrystalline microstructure.

A Blast valve is the device that is used in the air intake and the exhaust vent of CBRN(Chemical, Biological, Radiological and Nuclear warfare) protection facility. The valve is automatically closed when explosion pressure is applied from the outside of equipment. This study is investigated on the structural design and the performance of blast valve. After modeling the entire of blast valve and spring assembly, the data for the spring parameter is obtained through the finite element method and the operating limits of the valve are derived. Also, a prototype is made to determine the relationship between the load and the opening closing amount of valve through the load cell test. The performance of prototype at analysis as blast valve is agreed well with that at experiment. It is verified that the blast valve proposed in this paper is designed with the structure to endure the explosion pressure.

The purpose of this study is to understand the architectural space of Donggung(東宮), the Prince's Palace, and Dongjo(東朝), the King's Mother and Queen's living space, in the early Joseon Dynasty. The Royal palace can be divided into three parts, political space for king, living space for king and his family and government office. So first, we should to understand the characteristics of each space in the Royal Palace. Up to now we have looked at the architectural space of Donggung(東宮) and Dongjo(東 朝) in Gyeongbokgung(景福宮), one of the Royal Palace, the result of this study is as followings. Donggung which was living space for Prince consisted of Jaseondang(資善堂), Seunwhadang(承華堂) and Kyejodang(繼照堂) in the era of King Sejong Kyejodang was demolished and Seunwhadang was destroyed by fire in King Jungjong era and was not rebuilded. This buildings The buildings consisted of Jeondang, Whudang, main gate, hapmun(閤門) and corridor or fence Donggung and Dongjo was separated wall Dong consisted of many buildings for Queen dowager, Queen and many royal concubines The arrangement of Donggung and Dongjo was assumed like as the Fig2.

The purpose of this study is to understand the architectural space of Chimjeon (寢殿), the King's Bedroom, and Backyard, in the early Joseon Dynasty. The Royal palace can be divided into three parts, political space for King, living space for King and his family and government office. So first, we should to understand the characteristics of each space in the Royal Palace. Up to now we have looked at the architectural space of the King's Bedroom in the central area and Backyard in Gyeongbokgung (景福宮), one of the Royal Palace, the result of this study is as followings. Cheonchujeon (千秋殿) and Manchunjeon (萬春殿) were not both sides of Sajeongjeon (思政殿), were on the north side of Gangnyeongjeon (康寧殿) Gangnyeongjeon was not a bedroom for the King and Queen, only for King. Bedroom for Queen was located another space in the Royal palace. There was Hamwonjeon on the west side of Koytaejeon. Jamidang and Cheongyeonroo were on the right side of Koytaejeon The Backyard on the north side of Gyeongbokgung had a wide area for horseback archery and the practice of battle formation The arrangement of the King's bedroom in the central area was assumed like as the Fig 7. and Fig 8.

The purpose of this study is to understand the architectural space of Gwolnaegaksa (闕 內各司), the Government office in the palace, in the early Joseon Dynasty. The Royal palace can be divided into three parts, political space for king, living space for king and his family and government office. So first, we should to understand the characteristics of each space in the Royal Palace. Up to now we have looked at the architectural space of Gwolnaegaksa in Gyeongbokgung (景福宮), one of the Royal Palace, the result of this study is as followings. There were not many Gwolnaegaksas in the early days in Gyeongbokgung. After King Sejong, some office buildings were established in that palace. King's closest guards, like as Seonjeonkwan (宣傳官), Gyumsabok (兼司僕), Naegeumwi (內禁衛) had been on duty in Sajeongjeon Haengrang (思政殿行廊), a kind of servants´ quarters. Bincheong (賓廳), a conference room of high-ranking government officials was situated in Geungjeon Haengrang (勤政殿行廊). There were also barracks of other palace guards in Geungjeon Haengrang. Gyeongyeoncheong (經筵廳), a place to prepare and wait, was built separately from Geungjeon Haengrang Layout drawings of Gyeongbokgung painted since the 18th century were different from document in some parts. The arrangement of the Gwolnaegaksa was assumed like as the Fig. 9.

The purpose of this study is to understand the architectural space of Seungjeongwon (承政院), the Royal Secretariat, in the early years of Joseon Dynasty. The Royal palace can be divided into three parts, political space, living space for king and his family and offices for government official in the palace. So first, we should to understand the characteristics of each space in the Royal Palace. The result of this study is following. Seungjeongwon of the Joseon Dynasty was where Seungji (承旨), Juseo (注書), Sagwan (史官), Seungjeonsaeg (承傳色), Seori (書吏) and Harye (下隷) worked together. The architectural space of Seungjeongwon was separated into Jeongwon-Cheong (政院廳) and Juseo-Cheong (注書廳). Jeongwon-Cheong was the office for Seungji, where Sagwan worked as well as Seungji and Juseo. The form of Jeongwon-Cheong (政院廳) in Kyung-bok Palace was similar to that depicted in Eundaegyecheop (銀臺契帖), which was painted the meeting of Seungjis. Juseo-Cheong was the office for Juseo and Sagwan and there was a break room. Apart from Jeongwon-Cheong there were rooms where Seungji could work or take a rest. As with the office of Seungji, the space for Juseo also had rooms for Juseo. There were also rooms for Seori and Abang (兒房) which were rooms for servants.

This study is to comprehend the interior space of the Royal Palace in the 15th Century, the early years of Joseon Dynasty. The subject of this study is limited to the center of the Royal Palace, that is Jeongjeon(正殿, the royal audience chamber) and Haengrang(行廊, which encloses Jeongjeon on four sides and has many rooms). It is very important to understand the usage of the interior space because the architectural space consists of the space unified by the organic function of the interior and the exterior space. But there are few studies on the interior space of Jeongjeon and Haengrang at the Royal Palace. Therefore, the purpose of this study is to understand the interior space of those buildings. The result of this study is following. Haengrang has several uses such as a night duty room, a storehouse, a government office or a banquet hall etc. So the interior spaces were finished with various methods that were suitable for the use of each room, and the material of the floor were the ground, Maru(the wooden floor) or Ondol(the Korean traditional heating system) There were held many kinds of ceremonies in Jeongjeon, and the government officials could not enter the inside of that building and took part in the ceremony on the front court of Jeongjeon, except the men performing the ceremony. But the high ranking officials could enter the inside when King gave a banquet and there, they prostrated themselves before King. They sat down with their legs crossed on the ground floor instead of sitting on a chair. When King held tea ceremony with Chinese envoys in Jeongjeon, they sat on Gyoui(交倚, a kind of armchair). Then, the government officials performing the ceremony in Jeongjeon prostrated himself around the King and the Chinese envoys and others stood around them.

The main buildings of the important Buddhist temples - the pagoda, the Buddhist sanctum, the lecture hall - was surrounded by the cloister until Koryo Dynasty. And the Buddhist sanctum was located the center. It meant hat the Buddhist sanctum was important building. It is very important thing that we understand the usage of the interior space because the architectural space consists of the unified space by the organic function of the interior space and the exterior space and the exterior space. But there is not so much the study on the interior space of the Buddhist sanctum. So, the purpose of this study is to understand of the interior space of the Buddhist sanctum in Ancient and Medieval Times. Till now, it was impossible that the buddhist monk or the General public entered the Buddhist sanctum in Ancient and Medieval Times because they regarded the Buddhist sanctum as the place of sacrosanctity and the floor was finished by brick. But, we saw that they could enter the Buddhist sanctum. Of course the floor of the Buddhist sanctum was finished by bricks, but they spread mats on the floor, took off his shoes in the interior space and used the furniture for sitting on. The plan of the Buddhist sanctum was designed by the process of the ceremony and the way of the enshrinement of the Buddhist statues because it is the place to enshrine the Buddhist statues. They performed the ceremony like as pray, worship, offer food to Buddha, HaengDo-an act to turn round as object of worship and so on in the interior space of the Buddhist sanctum.