• Proceedings of the KIEE Conference
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• 2006.07b
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• pp.843-844
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• 2006

자기 기록 시스템이 더 높은 기록 밀도를 가지려면 기록 미디어에 더 작은 공간을 가지는 비트를 기록할 수 있어야 한다. 이를 가능하게 하기 위해서는 더 작은 비트를 보존 할 수 있는 고 보자력 기록 미디어와 이를 기록할 수 있는 자기 기록 헤드가 있어야 한다. 자기 기록 시스템에서 기록 밀도와 함께 중요시 되는 것이 바로 기록 속도이다. 시스템이 발전 할 수록 요구되는 속도 또한 높아지고 있다. 기록 속도가 빨라지려면 기록 주파수가 높아지고 기록 미디어의 회전 속도가 빨라져야 한다. 자기 기록 헤드는 자화되어 있는 고 보자력 기록 미디어 위를 빠른 속도로 직선 운동하고 있는 형태가 되고 이로 인하여 자기 기록 헤드에 와전류가 발생하게 된다. 발생되는 와전류의 형태는 기록 미디어에 자화된 형태에 따라 달라질 것이고 또한 자기 기록 미디어의 회전 속도와 와전류가 발생되는 기록 헤드의 전기전도도에 따라 변화 된다. 본 연구는 이렇게 발생된 와전류를 3차원 유한요소법을 이용하여 분석한 수 이 와전류가 기록 필드에 미치는 영향을 분석하여 제시 하였다.

• Journal of the Korean Magnetics Society
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• v.16 no.2
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• pp.149-156
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• 2006

The frequency of the recording current and the rotating speed of the recording media are Increase for the high densities in perpendicular magnetic recording system with high conductive pole tip head and soft magnetic under-layer. In the paper, the frequency Induced eddy current and velocity induced eddy currents are analyzed by non-linear 3-dimensional finite element analysis. It it turned out that the frequency induced eddy current decreases the amplitude of the recording fields, whereas the velocity induced eddy current only distorts the distribution of the recording fields in the recording media.

• Journal of Korean Society of Archives and Records Management
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• v.22 no.3
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• pp.143-150
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• 2022

With the enactment of the "Public Records Management Act" in 1999 and its revision in 2020, a records management system was established in the domestic public institutions. However, as the focus is on the management of public records, there are difficulties in managing the historical records of the university archives controlled by the nonelectronic records management system. To overcome these difficulties, this study looked at the case of Pusan National University Archives, which attempted to improve the function of the nonelectronic records management system using the "University Innovation Support Project." In particular, it is a case in which the function of the nonelectronic records management system was improved, catalogs reflecting the characteristics of resources were produced, and then the shelves were organized. It is hoped that the improvement of the nonelectronic records management system in Busan National University Archives will provide a positive direction for related organizations facing similar difficulties in the future.

• Journal of Korean Society of Archives and Records Management
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• v.16 no.4
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• pp.55-77
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• 2016

Recently, a number of record centers have reviewed the introduction of an RFID system for repository management. However, the RFID system currently in use by records management institutions is implemented with only a few functions for repository management. As such, a more efficient nonelectronic records management is required by improving the functions of the current RFID system. In this paper, the researchers proposed a method to improve its functions through an analysis of the RFID system being introduced for the management of nonelectronic records. To analyze the status of nonelectronic records management of records management institutions, the researchers investigated cases of the National Archives of Korea where RFID was introduced in 2007 and the records management institutions of local governments where RFID was introduced in 2016.

• The Korean Journal of Archival Studies
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• no.66
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• pp.69-104
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• 2020

The Records Centers' key institution is that ensure the continuity of custodys until records produced by the Office are transferred to the Archives. The transfer of records is the main works that the records center carries out annually. The introduction of the business management system in 2008 established electronic prodcuction and management of records. And Non-digital records have been registered and managed electronicallly on the system. This study analyzed the transfer procedure of non-digital records and the Transfer List between 2017 and 2019 by the Hamyang Office of Education Records Center. This study proposed improvement of transfer works by idnetifing and measuring the status of electronic management of non-digital records.

• Journal of Korean Society of Archives and Records Management
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• v.20 no.2
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• pp.107-113
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• 2020

This case focuses on the Seoul Credit Guarantee Foundation, which applied RFID technology as a record management system for efficient record management by identifying the characteristics of the agency's work that requires the management of large and similar nonelectronic records. When issuing RFID tags in conjunction with the business system, the records management system automatically obtains metadata from the system and secures it as a list, and records management personnel actively use it as the basis for overall records management tasks. To that end, the company reorganized its business processes, designed functions that reflect its unique business, and established infrastructure. These resulted in easier identification of the output and holding volume of accurate records, and work efficiency. Finally, people in charge of the work increased their awareness of records management.

• Proceedings of the KSME Conference
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• 2008.11a
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• pp.618-621
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• 2008

The magnetic recording system shows the difference of the magnetic recording density according to the direction of the magnetic field. The yoke shape of the recording system affects the magnetic field direction; therefore, the recording density may be raised by changing the shape. This paper intends not only to increase the magnetic flux density of the record region but also to reduce the recording loss of a specific region through the simultaneous design of the yoke and the magnet. The recording loss can be reduced by minimizing the magnetic flux of the adjacent area to the recording region. The topology optimization method is used to obtain the optimal shape both of the yoke and the magnet. And the commercial package, Maxwell is used to verify the result.

• Journal of Korean Electronics
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• v.5 no.8
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• pp.79-87
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• 1985

• Journal of the Korean Magnetics Society
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• v.14 no.2
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• pp.65-70
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• 2004

Read out signal and temperature distribution of magnetic amplifying magnetooptical disk were studied. Temperature distribution of recording layer and adjacent layers were calculated when the disk was at rest. Mark size, length and location were simulated from a chain of recording beam pulses. In addition, signal amplitude depending on the shape of the marks, readout signals from the recording layer and amplified marks of the readout layer, were simulated. Simplified thermal conduction model was used to calculate the temperature distribution of recording and adjacent layers as a function of time as well as to calculate the mark size, length and location. Readout signal was calculated by the convolution of the disk reflectivity and the Gaussian beam intensity. Readout signal from the mark in the readout layer amplified to the size of the laser beam fumed out to be twice as large as the signal from the crescent shaped mark in the recording layer.

• Journal of Korean Society of Archives and Records Management
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• v.21 no.1
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• pp.75-95
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• 2021

In this study, we focused on creating plans to manage the administrative information dataset of public records in closed universities. In particular, according to various reference materials and internal materials of the institution, we studied the theoretical discussion about the dataset and figured out the management status of the closed university's dataset. Therefore, as a measure for the data management of the Comprehensive Information Management System, recording targets are selected, retention periods are determined, administrative information dataset management standards are prepared, administrative information dataset evaluation and deletion are implemented, and comprehensive management systems of closed universities are established.