• Journal of Trauma and Injury
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• v.33 no.1
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• pp.61-62
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• 2020

• Geophysics and Geophysical Exploration
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• v.14 no.1
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• pp.123-126
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• 2011

• Journal of Periodontal and Implant Science
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• v.43 no.3
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• pp.143-143
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• 2013

• Kidney Research and Clinical Practice
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• v.37 no.4
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• pp.421-422
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• 2018

• The Korean Journal of Pain
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• v.32 no.4
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• pp.314-315
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• 2019

• Tuberculosis and Respiratory Diseases
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• v.85 no.1
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• pp.98-99
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• 2022

• The Korean Journal of Pain
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• v.36 no.4
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• pp.476-477
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• 2023

• Convergence Security Journal
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• v.14 no.2
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• pp.57-63
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• 2014

Internet users drastically increases, also through the Internet to buy various intrusion significantly increased. These various methods of intrusion defense thinking hacker attempting to hack the actual position of the real-time tracking of the intruder backtracking technique for research have been actively carried out. In this paper, a technique used in TCP Connection trace-back System in one packet trace-back technique watermarking technique using TCP Hijacking Connection Reply packets how to solve the difficulties of maintaining presented.

• Journal of information and communication convergence engineering
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• v.5 no.3
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• pp.181-184
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• 2007

In this paper, a CSSMA/AI MAC protocol in packet CDMA network is presented. The main features of this protocol are the code status sensing and reservation for reducing the packet collision. The base station broadcasts the code status on a frame-by-frame basis just before the beginning of each preamble transmission, and the mobile station transmits a preamble for reserving a code based on the received code status. After having transmitted the preamble, the mobile station listens to the downlink of the selected code and waits the base station reply. If this reply indicates that the code has been correctly acquired, it continues the packet transmission for the rest of the frame. If there are other packets waiting for transmission, the base station broadcasts the status of the code as reserved, and the mobile station transmits a packet on a reserved code for the successive frames.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2014.11a
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• pp.210-211
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• 2014

This study was conducted to present the improvement in professional perception among construction workers engaged in domestic construction sites by analyzing the reality of their professional perception. The results are as follows: First, with regard to professional perception of the construction industry, managerial workers made their positive reply to items regarding construction and construction workers but had their negative attitude towards construction as a job and as a recommendable job for others; whereas production workers showed their negative reply to all the items. Second, with respect to factors for construction being firmly regarded as an 3D industry, managerial workers selected 'long working hours' and production workers replied with 'low wages and income insecurity.' Third, as for improvement activities for professional perception of construction, most of construction workers simply knew about activities being performed but expressed their intention to participate in the activities.