• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2001.07a
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• pp.620-623
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• 2001

The peculiarities of using Self-propagating High-temperature Synthesis (SHS) and solid state phase synthesis for production of high temperature superconductor materials are discussed. Oxide superconductors with general formula $ReBa_2$$Cu_3$$O_{7-x}$ (Re= Y, Yb, Sm, Nd) have been made with using barium oxide initial powder instead of traditional barium carbonate. X-ray powder diffraction showed a single phase orthorhombic perovskite structure was produced in all reactions. Phenomena observed during the grinding of the reactant mixture are presented. Mechano-chemical activation - as a pretreatment of the reactant mixture - strongly influences the kinetic parameters, the reaction mechanism, and the composition and structure of the final product.

• The Korean Journal of Archival Studies
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• no.61
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• pp.5-29
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• 2019

The presidential archives of Participating Government were left as a result of record production innovation. The record proves the whole process of decision making and serves as a means of enhancing transparency and accountability. This article analyzed the existence form of records and asserted the necessity of reorganization. In the direction of the re-organization of records, we proposed a redesign of the record classification system, logical re-registration of records, and description of record detail information. In order to facilitate the use of the archives, the Presidential Archives should proceed with these tasks at the earliest opportunity.

• Asian-Australasian Journal of Animal Sciences
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• v.19 no.5
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• pp.756-762
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• 2006

The objective of this study was to define the effects of various cooking and re-heating methods (pan roasting, steaming, oven grilling and micro-waving) on the cholesterol and formation of cholesterol oxidation products in beef loin during storage at $4^{\circ}C$. Raw samples showed lower total cholesterol content than cooked products sampled during storage for 6 d. The following cholesterol oxidation products (COPs) were separated by gas chromatography: $7{\beta}$-hydroxy cholesterol, $20{\alpha}$-hydroxy cholesterol, 25-hydroxy cholesterol, cholestane-$3{\beta}$, $5{\alpha}$, $6{\beta}$ triol (triol), ${\alpha}$-epoxide and 7-ketocholesterol. Total amounts of COPs/cholesterol at 0 d were 0.74, 0.63, 0.76, 1.23 and 0.83% for the raw sample, pan roasting, steaming, oven grilling and micro waving methods, respectively. After 6 d storage almost of the samples had higher content of total COPs than at 0 and 3 d; the lowest (0.55%) COPs was found in the steaming cooking and re-heating method. The highest (5.96%) of COPs was found in the pan roasting cooking and re-heating method after 6 d storage. In conclusion, the concentration of total cholesterol and cholesterol oxidation of beef loin were increased as a consequence of cooking and re-heating methods. Steaming and micro-waving methods showed the lowest of cholesterol oxidation products under refrigerated storage for 6 d. However, each cooking and re-heating method had its own distinctive cooking effects.

• Journal of the Korean Society of Industry Convergence
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• v.25 no.6_2
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• pp.1097-1102
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• 2022

With the continuous development of the current industry, the current global environment is in a very serious situation, with resource supply and demand dependent on imports and huge costs for waste disposal due to the depletion of resources and mass generation of industrial waste. Its limitations have already been revealed in many fields, and the importance of re-manufacturing is drawing attention as a countermeasure to these problems. Re-manufacturing aims to recover products that are in the aging and disposal stages, recover to performance close to new products, and re-commercialize them. Among them, most of the machine tools are made of materials such as steel and cast iron with large structures, and raw materials are widely used when producing new products. In addition, since a lot of carbon is generated due to production, it is an object that can obtain a great re-manufacturing effect. Planner millers belonging to large machine tools are one of the machine tool equipment that can greatly reduce resources and energy through re-manufacturing because the structure is very large and the casting is several to tens of tons. Through this machine tool, performance tests and results are derived on the development of re-manufacturing source technology and domestic servo motor and CNC control device.

• Proceedings of the Korean Magnestics Society Conference
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• 2013.12a
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• pp.93-93
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• 2013

In the talk, the present research and production status of NdFeB magnets in China is outlined. The main research on NdFeB magnets at Zhejiang University is presented. The microstructural restructuring of grain boundaries of sintered NdFeB is focused. Through microstructural restructuring, the corrosion resistance of sintered NdFeB can be effectively improved, and NdFeB magnets with high coercivity and low heavy RE contents can be fabricated.

• International Journal of Internet, Broadcasting and Communication
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• v.16 no.3
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• pp.1-15
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• 2024

Under the new media era, the film and television post-production technology is changing day by day, in order to explore how to utilize the powerful functions of the Unreal Engine for the production of mythological themes in film and television. This paper in-depth study of the specific functions of the unreal engine on the film and television creation of help, analyze the evolution and development of the creation of mythological themes, put forward the problems it faces. Based on the creation needs of unreal engine and mythological works, this paper uses unreal engine to adapt Lu pan from Liaozai to explore its complete production process, and the production results show that unreal engine greatly improves the quality of the screen and the presentation effect, reduces the cost of the film's production, and improves the collaborative ability of the production team and the ability of creativity. However, the production process still requires high hardware equipment and paid plug-ins for Unreal Engine. We provide the establishment of the process for the combination of Unreal Engine movie and television production and mythological theme re-creation, supplements the production details, and provides suggestions for its further improvement.

• Proceedings of the Korean Society of Machine Tool Engineers Conference
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• 2000.04a
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• pp.224-228
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• 2000

The piercing and blanking of thin sheet metal working is specified division in press die design and making. In order to prevent the detects, the optimum design of the production part, strip process layout, die design, die making and try out etc. re necessary the analysis of effective factors. For example, theory and practice of metal shearing process and its phenomena, die structure, machine tool working for die making, die materials and its heat treatment, metal working in industrial and its know how etc. In this study, we analyzed whole of data base, theoretical back ground of metal working process, and then performed the progressive die tryout with the screw press. This study regards to the aim of small quantity of production part's press working. Part 1 of this study reveals with production part and strip process layout design.

• Journal of the Korean Society of Costume
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• v.65 no.3
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• pp.15-27
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• 2015

This study is the first research that examines the fashion manufacturers and merchants of the late 18th century France. Fashion specialists, (known as) Marchande de modes, started to appear in literature in the mid 18thcenturyandthe profession was officially recognized by the guild system in 1776. Rose Bertin was elected as the first representative. At the same time, there were two types of fashion specialists, tailleur and couturi${\grave{e}}$re. Tailleur had monopolized the production of the bodice and the skirt, which were the most important female dress parts. On the contrary, couturi${\grave{e}}$re only had the right to make petticoats, but they were not allowed to decorate it. In 1781, the couturi${\grave{e}}$re obtained the right to make and decorate the other parts of the dress, and this resulted in the two groups fighting over the rights to make dresses. And during this struggle, the Marchand de modes started to appear as a new occupation. Marchande de modes were privileged fashion merchants making or selling trimmings for dress and coiffure, and had authority to make capes and bonnets. Contemporary critics praised their talents for creating innovative and beautiful fashion styles, while some criticized them as women who just made luxury items. These records revealed how marchande de modes were viewed during that time.

• Journal of the Korean Society of Manufacturing Process Engineers
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• v.13 no.5
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• pp.21-27
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• 2014

Currently, wind power has become a major research field in the area of sustainable development. As one important component of a wind turbine transmission system, most instances of downtime due to a gearbox failure are caused by bearing failures. Gearboxes for wind turbines must have the highest levels of reliability over a period of approximately 20 years, withstanding high dynamic loads. At the same time, a lightweight design and cost minimization efforts are required. These demands can only be met with a well-thought-out design, high-quality materials, a high production quality and proper maintenance. In order to design a reliable and lightweight gearbox, it is necessary to analyze methods pertaining to the bearing rating lifetimes of the standard and of different companies, also including calculation methods for modification factors. This can determine the influence of the bearing lifetime.

• Korean Journal of Organic Agriculture
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• v.28 no.1
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• pp.1-30
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• 2020

This study argues that expanding the multifunctionality of agriculture (MFA) may mitigate existing agricultural problems. To do that this study redefines the concept and scope of the MFA and presents practical tasks to achieve it. Theorizing the MFA begins with the theory of sustainability and first identifies the link between sustainability and MFA. Later, considering the limitations of the existing sustainability theories, we examined where the false linkages leading to the destruction of environmental and social relations originated, and employed the (Re)productivity [(Re)produktivitat] theory in order to obtain alternatives. Research shows that welfare effects of the MFA on humans and the environment are not less than those derived from the agricultural products supplied to the real market, but the values are not recognized. The absence of proper care and compensation is the basis of agricultural problems in Korea. Therefore, this study acknowledges that the MFA is as much worthy as real agricultural production, and insists that appropriate compensation and care should be given to humans (farmers) and nature (agricultural ecosystem) in order to maintain and expand the MFA. In other words, a virtuous cycle between sustainability and the MFA means that the process spreads sustainable farming methods to expand the MFA, forms social consensus on it, and pays fair remuneration for agriculture from the public sector. Transition to such a virtuous cycle requires re-establishing the definition and scope of the MFA, implementing targeting policy, motivating policy targets, strengthening human capacity, and arranging maturity time.