• Journal of the Korea Institute of Information and Communication Engineering
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• v.26 no.6
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• pp.914-921
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• 2022

The International Maritime Organization (IMO) has set a goal of reducing ship's carbon dioxide emissions by 70% and greenhouse gas emissions by 50% by 2050 compared to 2008. Shipowners and shipyards are promoting various R&D activities such as LNG propulsion, ammonia propulsion, electric propulsion, CO₂ capture, and shaft generators as a way to satisfy this problem. The dual shaft generator has the advantage that it can be directly applied to an existing ship through remodeling. In this paper, the total fuel reduction rate that can be obtained by applying the shaft generator to the existing ship was verified through simulation. For this purpose, the size of the medium-sized ship was defined, and the governor, diesel engine, propeller, torque switch, generator for shaft generator, propulsion motor for shaft generator, and ship model were modeled and simulated.

• Journal of the Korean Society of Industry Convergence
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• v.25 no.3
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• pp.433-441
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• 2022

In general, in an emergency generator system for an electric facility including an induction motor load, an emergency power generation facility larger than the facility load capacity is built due to the initial starting current of the induction motor. In order to reduce this economic burden, various methods to reduce the inrush current of induction motors are applied to suppress the additional expansion of generators due to the reduction of power generation facilities and the increase in electrical facilities. Among these methods, when a system with a built-in soft start function of an induction motor using an inverter is built, it is the best way to reduce the inrush current of the induction motor to less than the rated current. However, in this case, the installation cost of the inverter to drive the induction motor increases. This paper proposes a soft start method of an induction motor by expanding the frequency and voltage control operation area of an emergency generator. In addition, proposed a speed calculation method based on power factor information, which is essential information for stable soft start of an induction motor, and a method for generating a speed command value of the governor for starting with maximum torque.

• Journal of architectural history
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• v.31 no.4
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• pp.7-16
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• 2022

Since the beginning of the second Sino-Japanese war in 1937, the entire Korean Peninsula has entered a full-fledged wartime system. Japan enacted laws that strongly regulate the distribution of various resources for war, and the same was implemented in Joseon. In particular, as iron, copper, lead, tin, and aluminum were mobilized as raw materials for military supplies such as weapons, private distribution decreased significantly, which had a great impact on the construction industry. As the use of metal such as steel as building materials requires permission from the provincial governor, it has become difficult to supply and demand except for some military facilities. In addition, the Japanese Ministry of Commerce and Industry encouraged research and development and manufacturing to promote the so-called "substitute goods industry" to make up for the shortage of supplies. Products with improved performance through chemical treatment by injecting only a small amount of the same raw material than before or using alternative raw materials have been developed. It was intended to overcome the limitations of lack of raw materials through the chemical industry. In terms of building materials, various substitutes were produced due to the incorporation of petrochemicals and the use of synthetic resins. This trend continued even after the end of the war and served as one of the backgrounds for R&D and production of new materials without returning to the "substitute goods."

• Journal of Korean Medical classics
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• v.36 no.3
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• pp.55-87
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• 2023

Objectives : To examine changes in Korean Medicine during Japanese occupation through major Joseoneo dictionaries. Methods : Based on the Keun Sajeon, published in 1957 by the Korean Language Society, the most recently published among the major dictionaries under Japanese occupation, key Korean Medical terminology in the Joseoneo Sajeon, published in 1920 by the governor-general of Joseon, and the Joseoneo Sajeon, published in 1938 by Mun Seyeong were analyzed. The differences among the dictionaries provided insight into the situation which Korean Medicine was in. Results : 1) There was a lack of consistency among Korean Medical terminology. 2) Changes in medical policies and legislation were reflected in the Korean Medical terminology without much delay. 3) Korean Medicine was distinguished as a separate category in the Keun Sajeon for the first time. 4) With the exception of Korean Medicine specific terminology, most were explained using 'modern' concepts and ontology. Conclusions : Modernization lead by the Japanese splintered many areas of Joseon society, and Korean Medicine was no exception. This transition period as reflected in the terminology within the Joseoneo dictionaries show that Korean Medicine went through a process of regulation by changes in medical policies and legislation, while new, modern studies brought in by the Japanese started replacing language and ontology of pre-occupation Joseon. A look into Korean Medicine during Japanese occupation through Joseoneo dictionaries allows us to examine the connection between Korean Medicine and the more broader historical context in which it was situated.

• Plant Journal
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• v.18 no.4
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• pp.66-72
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• 2023

In order to respond to the demand for flexible operation of thermal power generation, development of natural sliding pressure operation that minimizes throttle loss by opening the turbine control valve 100% and maximize power generation efficiency in conjunction with ESS in order to quickly respond to fluctuations in the system frequency is required. The logic development of natural sliding pressure operation with ESS was developed to modify the existing logic at the power plant's top-level control logic such as the unit master, the boiler master and the turbine master. Cooperative control algorithms that complement the advantages and disadvantages of ESS operation (quick response, limited capacity) and power plant operation (slow response, continuous operation) not only improve efficiency when applied to actual power plants, but also respond quickly and flexibly to load demands to ensure system stability.

• Journal of North-East Asian Cultures
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• v.28
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• pp.339-363
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• 2011

This thesis examines analyzing how historic knowledge was shaped in museum. Examining by Tokyo Imperial Museum, Government General Museum of Taiwan, Yi Wang Ga Museum, Government General Museum of Chosun, and NanTong Museum of late 19th and early 20th century, tried to find out similarities and differences. These museums are similar in that they adopt museums as modern system considering models of other countries(Europe or Japan) and exhibitions played important roles in gathering relics. Experts who leaded adoption of western civilization played an important role. These experts were conservatives who valued tradition and relics while they aimed for western civilization. It originated in the character of museum system. Historical Knowledge by museums was constituted with five combinations of conceptions which are nationality, locality, coloniality, and artistry. Every museum cannot help having modernity for museum itself is modern system. Modernity was symbolized by museum building of western style in Yi Wang Ga Museum, Government General Museum of Chosun. Tokyo Imperial Museum revealed nationality in that it tried building of imperial history which includes colonies. In early time, Tokyo Imperial Museum pursued modernity and artistry, however it concentrated on artistry than modernity later. We can find locality in that Tokyo Imperial Museum tried to find meaning about Japanese art by relating with natural characteristics. It is Taiwan Governor Museum that extremely expressed coloniality and artistry was not considered. Government General Museum of Chosun could not be exceptions of features of coloniality, but it need to recognize that artistry was focused all over the exhibitions. It was NanTong Museum that most directly expressed locality. Like these, Museums of East Asia established in around 1900 made different historical knowledge by varying weigh of five factors, nationality, locality, modernity, coloniality and artistry.

• Korean Journal of Heritage: History & Science
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• v.53 no.2
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• pp.156-179
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• 2020

The Preservation Decree (1933) is the basic law relevant to the conservation of cultural property of colonial Chosun, and invoked clauses from the Old History Preservation Act (1897), the Historic Scenic Sites Natural Monument Preservation Act (1919), and the National Treasure Preservation Act (1929), which were all forms of Japanese Modern Cultural Heritage Law, and actually used the corresponding legal text of those laws. Thus, the fact that the Preservation Decree transplanted or imitated the Japanese Modern Cultural Heritage Law in the composition of the constitution can be proved to some extent. The main features and characteristics of the Preservation Decree are summarized below. First, in terms of preservation of cultural property, the Preservation Decree strengthened and expanded preservation beyond the existing conservation rules. In the conservation rules, the categories of cultural properties were limited to historic sites and relics, while the Preservation Decree classifies cultural properties into four categories: treasures, historic sites, scenic spots, and natural monuments. In addition, the Preservation Decree is considered to have advanced cultural property preservation law by establishing the standard for conserving cultural property, expanding the scope of cultural property, introducing explicit provisions on the restriction of ownership and the designation system for cultural property, and defining the basis for supporting the natural treasury. Second, the Preservation Decree admittedly had limitations as a colonial cultural property law. Article 1 of the Preservation Decree sets the standard of "Historic Enhancement or Example of Art" as a criteria for designating treasures. With the perspective of Japanese imperialism, this acted as a criterion for catering to cultural assets based on the governor's assimilation policy, revealing its limitations as a standard for preserving cultural assets. In addition, the Japanese imperialists asserted that the cultural property law served to reduce cultural property robbery, but the robbery and exporting of cultural assets by such means as grave robbery, trafficking, and exportation to Japan did not cease even after the Preservation Decree came into effect. This is because governors and officials who had to obey and protect the law become parties to looting and extraction of property, or the plunder and release of cultural property by the Japanese continued with their acknowledgement,. This indicates that cultural property legislation at that time did not function properly, as the governor allowed or condoned such exporting and plundering. In this way, the cultural property laws of the Japanese colonial period constituted discriminative colonial legislation which was selected and applied from the perspective of the Japanese government-general in the designation and preservation of cultural property, and the cultural property policy of Japan focused on the use of cultural assets as a means of realizing their assimilation policy. Therefore, this suggests that the cultural property legislation during the Japanese colonial period was used as a mechanism to solidify the cultural colonial rules of Chosun and to realize the assimilation policy of the Japanese government-general.

• Korean Journal of Heritage: History & Science
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• v.39
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• pp.165-189
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• 2006

The purpose of this study is to examine process and organization of local government-managed construction by reviewing official documents and materials in regard to the official residences and castles officially constructed in Dongnae in the 19c Chosun Dynasty. Results of this study can be described as follows. 1) The construction of official residences requires exchanges of official documents among upper and lower governmental agencies concerned. Previously prepared for some 1 or 2 months, the construction was proceeded through proceeded from Paok to Gaegi, Ipju, Sangryang, Gaeok and to Iptaek. Such construction was carried out independently and concurrently Gijang and Yangsan neighboring Dongnae provided cooperation by way of supplying labor and timbers. 2) Dongnaebu castle was constructed under local autonomy system, like other government-oriented works, as governor of Dongnae became responsible for defending such establishment in 1739. The castle was built up in 1731 as an establishment with 6 gated and 15 forts. Directly controlled by governor of Dongnae, the castle continued to be partially repaired until the 19th century. Under the regime of Daewongun, the castle was enlarged and extended for military strengthening. Besides the gate having double-gated structure for the outside wall, the other five gates came to have bastions and 30 forts were additionally established, dramatically changing the structure of the castle as whole. 3) Government-managed construction was often implemented by an organization whose members included local government officials, lower administrative agencies and local influential persons. The construction of official residences was implemented by Gamyeokdogam which was headed by Jwasu of Hyangcheong. In the construction, chief of military officials became supervisor, who was responsibly supported by Saekri. The construction of castled were divided into several works, for example, establishments of fortress, tower gate and quarrying stone were implemented by the organization of Paejang, Gamkwan and Saekri. As a military official, Gamkwan supervised the construction. Saekri was in charge of related internal affairs. Paejang was an technical expert leading several workers. The construction of castles in 1870 were organized as a general rule having particularity of social conditions on Dongnae.

• The Korean Journal of Archival Studies
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• no.39
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• pp.281-318
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• 2014

This article aims to inquire into the decision making system and the sources of the original documents made by means of it in Imperial Japan, the colonial Chosun, GHQ, and the occupied Japan in terms of the post-war treatments of compensation on the Japanese colonial rules. It deals with them from 1910 to 1952 in the perspective of history and archivistics. This article attempts to establish the foundation on which the perception of the documents made in the Imperial Japan, its colony, and the occupied territory would be widened by placing the colonial rules and the compensation on them into a continuous line. The records of Japan's forced occupation of Korea during 1910-1945, and the original records documenting the decision making process of post-war compensation under GHQ, 1945-1952, have been dispersed in Korea, Japan and the United States. This dispersed preservation was mainly due to the complicated decision-making process among Governor-General of Chosun, the Japanese Imperial government, and the GHQ. It was the top-down styled, dual decision making system, in which the critical policies, personnel, and budget had been decided in Imperial homeland, while their implementations were made in the colonies. As a result, the records documenting the whole process of domination have been preserved dispersedly in Japan and its colonies. In particular, the accounts of not yet paid Korean workers that was forced to mobilize in Japan's colonial periods, which is emerging as the diplomatic conflict between Korea and Japan, had been dealt in the decrees of the Japanese government and policy-making of GHQ. It has already been changed to the problem as 'economic cooperation' from the 'debt'. Also, the critical records for post-war compensation were preserved dispersedly in the United States and Japan under the top-down decision making process of GHQ-Japan. Therefore, the dispersed records of 1910-1952 about the colonial rules by the Imperial Japan and the post-war compensation on them must be re-investigated for the adequate documentation in the context of time and space.

• Korean Journal of Oriental Medicine
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• v.13 no.2 s.20
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• pp.15-25
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• 2007

Neo-Confucianism(性理學) which provided an ideological base to found Chosun Dynasty which substituted for Koryu Dynasty, presented In-Cheong(仁政) as ideal statecraft. In-Cheong(仁政) is realizing spirit of In(仁) which means a forever creating power(生生之心), for that reason it was a natural result that the ruling class of Chosun Dynasty had interest in medical science. Therefore they remarked 'In-Cheong(仁政) has achieved' when medical books were published, also remarked Hwal-In-Seo(活人署） as an institute of realizing Wang-Cheong(王政) while Hwal-In-Seo(活人署) was placed in very low civil service grade, although the ruling class classified medical science as a Chap-Hak(雜學) which means not essential but necessary knowledge, and ranked it much lower than Confucianism. While had improved medical service system of Korea Dynasty, Chosun Dynasty had special interest in local medicine: expanding provincal medical centers, educating a medical student(醫生) in a medical school who was core human power in local medicine, etc. Nevertheless the local medicine was still depressed. The reasons are ; not providing enough medical center, not much fund to run each center and mobilizing a medical student(醫生) for miscellaneous labor. Depressed local medicine had changed when 士族 came to have an interest in medical science. 士族 had read a lots of medical books from the early Chosun Dynasty. 16th century they even wrote some books on medicine by themselves based on their experience as a provincial governor.　On the other hand Yi-Mun-Geon(李文楗) who wrote Muk-Jae Diary belongs to the latter. He did not use the art of acupucture. He was a civil official in Seoul, so he could get a lots of books and enough medical stuffs. After a while. he was exiled in Seong-Ju(星州) and took part in local medicine there. The local medicine was depressed in Seong-Ju(星州) at that time. Yi-Mun-Geon(李文楗) was a kind of medical consultant as well as a local doctor. Such medical doings by Sa-Jok(士族) may be a moment that provide power to local Sa-Jok(士族). Sa-Jok(士族) themselves were enthusiastic in treating their sick slaves because the slaves were financial foundation of Sa-Jok(士族). After 17th century, however, the relative importance which Sa-Jok(士族) in the country had held in 16th century had decreased gradually while professional doctors bad increased.