• The Journal of Korean Institute of Communications and Information Sciences
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• v.36 no.7A
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• pp.662-668
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• 2011

This paper analyzes the performance of the Ad hoc On-demand Distance Vector (AODV) routing protocol and Optimized Link State Routing (OLSR) for Mobile Ad hoc Networks (MANETs) using node mobility models. Mobility affects the performance of a routing protocol as it causes changes to network topology. Thus, evaluating the performance of a MANET routing protocol requires mobility models that can accurately represent the movements of mobile nodes. Therefore, this paper evaluates the performance of the AODV and OLSR routing protocols using the random way point model and the Levy walk model by the ns-2 simulations.

• Bulletin of the Korean Space Science Society
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• 1994.04a
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• pp.7-7
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• 1994

No Abstract. See Full-text

• Journal of the Korean Mathematical Society
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• v.27 no.2
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• pp.255-280
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• 1990

• Journal of the Korean Mathematical Society
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• v.22 no.2
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• pp.199-210
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• 1985

• Honam Mathematical Journal
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• v.12 no.1
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• pp.113-123
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• 1990

• The Bulletin of The Korean Astronomical Society
• /
• v.21
• /
• pp.9.1-9.1
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• 1996

• The Mathematical Education
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• v.16 no.1
• /
• pp.47-49
• /
• 1977

• 한국사회복지학회:학술대회논문집
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• 2007.10a
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• pp.184-200
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• 2007

• Journal of Labour Economics
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• v.35 no.1
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• pp.21-54
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• 2012

This paper investigates how technological change and the consequential occupational choices do influence the recent Korea labor market. Following Autor, Levy and Murnane (2003) and Autor, Katz and Kearney (2006), it shows that decreasing price of computer assets raises relative wages for nonroutine tasks and the self-selected occupational choices with increasing demands for computerization in routine tasks would be a main cause for the job polarization in the labor market.

• Publications of The Korean Astronomical Society
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• v.10 no.1
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• pp.1-14
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• 1995

We observed impact spots on Jupiter which were formed by the collision with fragments of Shoemaker-Levy 9 comet during the period from 17 July to 13 August, by using the SNU 61cm reflector combined with CCD camera and DBVRI filters. In order to get more clear image of impact spots, the observed data were processed by the unsharp masking method, high-pass filtering method and Richardson-Lucy algorithm after the basic processing through IRAF package. The sizes of impact spots range from 2000km to 1000km, and from this size, the original size of comet fragments before collision with Jupiter is estimated to be less than ${\sim}3km$. From the observed rotating rate of impact spots, the rotational period of Jupiter is determined as $9^h$ $56^m$ $32^s$ at the southern latitude of $47^{\circ}{\sim}49^{\circ}$.