• Food Science of Animal Resources
• /
• v.25 no.2
• /
• pp.218-225
• /
• 2005

This study was performed to determine sequence variation and RFLP of the mt DNA D-loop region using Southern blot hybridization analysis and to develop mt DNA marker affecting milk production traits in Hanwoo cows. The PCR was used to amplify an 1142 bp fragment within the D-loop region of mt DNA using specific primers. Mt DNA were digested with seven restriction enzymes and hybridized using DIG-labeled D-loop probe. The mt DNA RFLP polymorphisms were observed in the four enzymes, BamHI, RsaI, XbaI and HpaII. Nucleotide substitutions were detected at positions 441 (G/C), 469 (T/C), 503 (C/T), 569 (G/A), 614 (C/A) and 644 (C/T) of the mt DNA D-loop region between two selected lines. Significant relationship between the XbaI RFLP type and breeding value was found(p<0.05). Cows with A type had higher estimated breeding values than those with B type (P<0.05) between high and low milk production lines. Therefore, the RFLP marker of mt DNA could be used as a selection assisted tool for individuals with high milk producing ability in Hanwoo.

• Analytical Science and Technology
• /
• v.11 no.4
• /
• pp.248-253
• /
• 1998

The adsorption and separation behaviors of alkali, alkaline earth and transition metal ions using a poly-dibenzo-18-crown-6 were investigated in aqueous solution. The adsorption degree(E) and distribution ratio(D) of alkali, alkaline earth metal ions were Li(I)$t_R$) of metal ions were affected by the adsorption degree(E) and distribution ratio(D). This results showed good separation efficiency of K(I), Sr(II), Ag(I) and Pb(II) from the mixed metal solution.

• Journal of Korea Multimedia Society
• /
• v.16 no.8
• /
• pp.994-1004
• /
• 2013

3D stereoscopic cinema emerged as a new dominant media format. In principle, the stereoscopic cinema imitate the vision of the human being has two eyes. The stereoscopic cinema is filmed with 2 connected cameras at the same time and projected these 2 different images. With the stereoscopic glasses, the human being can see the overlapped images as a single 3D stereoscopic image. To make 3D stereoscopic cinema, it is very important to systemize the process of the 3D stereoscopic cinema production and to use the principle of the 3D stereoscopic cinema. This paper investigates the possibilities of the using the 3D stereoscopic principles such as the I.O.D, convergence point, parallax and the 3D comfort zone. Using the principle of the 3D stereoscopic cinema can be the technique of directing the film. Using the example of 3D stereoscopic short film My Birthday, I investigate the main technique of the 3D stereoscopic cinema.

• 한국당과학회:학술대회논문집
• /
• 2006.11a
• /
• pp.52-52
• /
• 2006

• Bulletin of the Korean Mathematical Society
• /
• v.50 no.5
• /
• pp.1651-1657
• /
• 2013

Let R be a prime ring, I a nonzero ideal of R, $d$ a derivation of R, $m({\geq}1)$, $n({\geq}1)$ two fixed integers and $a{\in}R$. (i) If $a((d(x)y+xd(y)+d(y)x+yd(x))^n-(xy+yx))^m=0$ for all $x,y{\in}I$, then either $a=0$ or R is commutative; (ii) If $char(R){\neq}2$ and $a((d(x)y+xd(y)+d(y)x+yd(x))^n-(xy+yx)){\in}Z(R)$ for all $x,y{\in}I$, then either $a=0$ or R is commutative.

• Journal of the Korean Mathematical Society
• /
• v.46 no.5
• /
• pp.997-1005
• /
• 2009

Let R be a prime ring, I a nonzero ideal of R, d a derivation of R and n a fixed positive integer. (i) If (d(x)y+xd(y)+d(y)x+$yd(x))^n$ = xy + yx for all x, y $\in$ I, then R is commutative. (ii) If char R $\neq$ = 2 and (d(x)y + xd(y) + d(y)x + $yd(x))^n$ - (xy + yx) is central for all x, y $\in$ I, then R is commutative. We also examine the case where R is a semiprime ring.

• Journal of Acupuncture Research
• /
• v.20 no.2
• /
• pp.68-76
• /
• 2003

Objective : In the pain control, Bee Venom Acupuncture therapy is highly effective but cause allergic side-effects frequently. This study was performed to compare Bee Venom(BV) with BV Partner(BVP) in decreasing side-effects of BV. Methods : BV partner(BVP) which dilutes the Morus bombycis Koiduzumi Herbal Acupuncture was developed to decrease the side effects of the Bee Venom. We used D.I.T.I. to verify the effectiveness of BVP in decreasing side-effect of BV. We injected BV to Group I (n=18) at 4 points of body [Fengmen(風門 : B12), Feishu(肺兪 : B13), Fufen(附分 : B41), Pohu(魄戶 : B42)], and BVP to group II (N=18) at the same points. We observed the chages of temperature at beginning, 5 minutes, 1 hour, 1 day, 2days and 7days after injection. Results : The following results were obtained; 1. The difference of temperature had been continued until 2days in BV group, but 1day in BVP group. 2. The difference of temperature was significantly greater than time at 1hour in BV and at 5 minutes in BVP. 3. Other side-effects(the local pain, redness, angioedema and pruritus) were less appeared in BVP than BV group, too.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
• /
• 2007.11a
• /
• pp.149-150
• /
• 2007

ONO(Oxide-Nitride-Oxide)구조는 기억소자의 전하보유 능력을 향상시키기 위해 도입된 게이트 절연막이다. 본 연구에서는 ELA(Excimer Laser Annealing)방법으로 비정질 실리콘을 결정화 시켜서 그 위에 NVM(Nonvolatile Memory)소자를 만들어 전기적 특성을 측정하여 결과를 나타내었다. 실험 결과 같은 크기의 $V_D$에서 $V_G$를 조절함으로써 $I_D$의 크기를 조절할 수 있었다. $V_G-I_D$ Graph에서는 $I_{on}$과 $I_{off}$, 그리고 Threshold Voltage를 알 수 있었다. $I_{on}/I_{off}$ Ratio는 $10^3-10^4$이다. $V_G-I_D$ Graph에서는 게이트에 인가하는 Bias의 양을 통해서 Threshold Voltage의 크기를 조절할 수 있었다. 이는 Trap되는 Charge의 양을 임의로 조절할 수 있다는 것을 의미하며, 이러한 Programming과 Erasing의 특성을 이용하여 기억소자로서의 역할을 수행하게 된다.

• The Journal of Korean Institute of Communications and Information Sciences
• /
• v.25 no.3A
• /
• pp.353-361
• /
• 2000

The performance of a multi-carrier CDMA system is analyzed considering frequency selective multipath fading and Near/Far effects. The number of multicarrier, multiuser, and arms of RAKE receiver, and the decay ratio of frequency selective multipath fading are used as a parameter for the performance analysis. More over, the distribution and the strength of multiuser interference are also considered. To evaluated the Near/Far effects in a multi-carrier CDMA system, three distribution models are assumed. In the first model. interference to carrier Ratio, I/C, ranges form -4 dB to 4dB, and at each 2 dB interval 20 % of multiuser is assumed to be uniformly distributed. In the second one, I/C ranges from -2 dB to 2 dB, and 33.3% of multiuser is assumed to be equally dispersed at each 2dB interval. The third model is 0 dB of I/C, that is, with perfect power control, multiuser are assumed to be evenly located. In this paper, multi-carrier CDMA system adoption RAKE receiver is proposed to mitigate the frequency selective multipath fading. Form the results, the third model(i.e. perfect power control)shows the best performance, and the narrower range of I/C causes the less effects to the desired signal, which reads to the better performance.

• The Journal of Korean Institute of Electromagnetic Engineering and Science
• /
• v.19 no.4
• /
• pp.411-417
• /
• 2008

This paper presents the miniaturization of circularly polarized microstrip patch antenna for UHF-band RFID portable reader. The proposed antenna has a group of four I-slots on a conventional corner-truncated square microstrip patch and it is shown that the antenna size is reduced compared to the antenna without I-slots. A 76 mm by 76 mm small antenna with four I-slots is fabricated with 6.4 mm thick FR4 substrate and its 10 dB return loss bandwidth, the gain and the axial ratio are measured to be $938{\sim}975\;MHz$, $-0.88{\sim}-2\;dBi$, and $3.27{\sim}13.21\;dB$ within the 10 dB return loss bandwidth, respectively.