• Proceedings of the KIEE Conference
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• 2003.04a
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• pp.128-132
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• 2003

The increase of vehicles stagnations leads to the increasing attention to the way customers pay and a large number of projects on electronic cash system. Transport system is comprised of a number of advanced technologies, including information processing, communications, control, and electronics. Recently many research on a system which provides contact in order to protect driver's vehicle passage have been carried out. And some potential problems from that system are being reviewed by electronic cash system. In this papers, we suggest RF protocol developing technology using the concept of electronic cash. ATM electronic cash developing is consist of component of pre-developed coin throw, integration of component using its, and production of more requirement-satisfactory ITS solution. Result increase 15-40% pre-type vehicles stagnations. Especially, we expect this proposed concept would be well adapted to our national environments

• Journal of the Korea Computer Industry Society
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• v.4 no.10
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• pp.547-558
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• 2003

This paper is a parking management system which uses mobile terminal equipment by the client. From the Web server, the client will be served about the information concerned with the location o( parking lot, parking time, and payment after accessing the parking management web site. After the sensor which is set in the parking lot perceives the information about the client's car, it will inform the client of the parking place. This system is designed to control the large and complex parking lot and serves a very convenient interface to the user.

• Proceedings of the Korean Information Science Society Conference
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• 2002.10e
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• pp.286-288
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• 2002

최근 인터넷과 무선통신기술의 융합으로 인한 Mobile 서비스의 급격한 발전으로 인해 무선 인터넷 시장이 도입 및 성장단계에 이르렀다. 그러나 현재 무선 인터넷 환경은 음성 서비스 위주의 개인사용자 시장이 한계에 도달하면서 이동통신의 무선단말기를 통해 다양한 비즈니스를 벌일 수 있는 기업용 모바일 솔루션 시장이 크게 확대되고 있고 모바일데이터서비스 시장의 비중이 크게 늘어가고 있다. 이러한 데이터서비스 교환에 XML문서를 사용한다면 데이터의 상호 처리 능력을 향상시키고 데이터의 공용성과 프로그램의 유연성을 향상시키는데 필요한 비용과 노력을 훨씬 절감할 수 있다. 본 논문에서 제안된 시스템 설계를 통해 XML 문서를 데이터 교환에 사용하여 무선 장치의 CPU, 메모리, 네트워크 대역폭의 부하를 줄임으로써 무선 인터넷에서 보다 빠르고 효율적으로 문서를 주고받을 수 있도록 구현하였다.

• Proceedings of the Korea Multimedia Society Conference
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• 2002.05d
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• pp.690-694
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• 2002

무선 인터넷의 성장에 대한 높은 기대에도 불구하고 이를 위한 컨텐츠의 제공은 아직까지 부족한 상태로, 무선 인터넷 시장이 보다 활성화되기 위해서는 많은 양질의 컨텐츠가 제공되어야 한다. 이러한 많은 양질의 컨텐츠를 확보하기 위해서는 기존의 유선 인터넷 컨텐츠를 그대로 활용하면서 프리젠테이션 로직만을 분리하여 단말기에 탑재하는 방식이 유용하다. 또한, 분리된 프리젠테이션 로직과 기존의 유선 인터넷 측의 로직을 연결하기 위해서는 여러 단말기에서 지원되며 다양한 인터넷 접속 방식을 제공하는 Java 기술이 유리하다. 본 연구에서는 이러한 Java의 장점들을 활용하여 무선환경에서 작동하는 티켓 예약 응용시스템을 개발하였고, 이를 통해 효율적인 무선 응용 시스템 구축 방법의 모델을 제시하고자 한다. 본 연구에서 활용한 방식을 따르면 보다 효율적이고 마르게 무선 응용 시스템을 구축할 수 있으며, 기존의 유선 인터넷 컨텐츠를 활용함으로써 다양한 양질의 컨텐츠를 쉽게 확보할 수 있어, 무선 인터넷의 활성화에 도움이 될 수 있을 것으로 기대한다.

• Proceedings of the Korea Information Processing Society Conference
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• 2001.04b
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• pp.817-820
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• 2001

본 논문에서는 자바 모바일 플랫폼을 기반으로 하는 M-Commerce 보안 플랫폼을 검토하고, J2ME 기반 CLDC와 MIDP를 이용해서 M-Commerce 전자지불을 위한 휴대용 전자지갑 구현방안을 제시한다. 본 논문에서 제안한 방안은 무선 인터넷 환경에서 신용카드 결제 방식으로 지불할 경우 관련 중요 정보를 안전하게 전송하고, 대금 결제를 할 수 있도록 한다. 그리고, 무선인터넷 응용프로토콜 WAP 방식의 보안을 고려한 WTLS 보안 메커니즘을 이용하고, J2ME 기술을 기반으로 하기 때문에 향후 IMT2000에서도 사용 가능하다.

• Proceedings of the Korean Information Science Society Conference
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• 2006.10a
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• pp.404-408
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• 2006

최근 임베디드 디바이스에 여러 가지 장점을 제공하는 자바기술은 필수적인 요소가 되었다. 임베디드 디바이스에 적용되는 자바기술은 J2ME 플랫폼이며, 이는 K 가상 머신(K Virtual Machine)의 핵심인 CLDC(Connected Limited Device Configuration)와 그래픽 유저 인터페이스, 네트워크 API, 사운드 API 등을 명세하고 있는 MIDP(Mobile Information Device Profile)로 구성되어 있다. 이 중 그래픽 유저 인터페이스와 네트워크, 사운드 부분은 구현 시 시스템에 의존적인 부분을 따로 구현해야 하는데, 이는 네이티브(native)함수로 구현할 수 있다. 본 논문에서는 J2ME 플랫폼에서 정의된 사운드 API 의 기능들을 분석하여 임베디드 시스템에 적합한 사운드 API 의 네이티브 함수를 구현하였다.

• Journal of the Korean Society of Radiology
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• v.10 no.5
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• pp.337-341
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• 2016

We measured the neutron capture cross-section of natural Sm(n,${\gamma}$) reaction in the energy regions from 0.003 to 10 eV. The 46-MeV electron linear accelerator of Research Reactor Institute, Kyoto University was used for generating a continuous neutron source. The neutron time-of-flight method was adopted for energy measurement. An assembly of BGO($Bi_4Ge_3O_{12}$) scintillators composed of 12 pieces of BGO crystals measured prompt gamma rays from Sm(n,${\gamma}$) reaction. The BGO assembly was located at a distance of $12.7{\pm}0.02m$ from the neutron source. In order to determine the neutron flux impinging on the Sm, the $^{10}B(n,{\alpha}{\gamma})^7Li$ standard cross-section were used. Natural Sm(n,${\gamma}$) reaction measurement result of the neutron capture cross-section was compared with the results of evaluation of the BROND-2.2 and the previous experimental data of J. C. Chou and V. N. Kononov.

• Journal of the Korean Society of Food Science and Nutrition
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• v.37 no.9
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• pp.1136-1141
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• 2008

This study was to investigate antiwrinkle effect of mugwort (Artemisia vulgaris) methanol extract in hairless mouse skin induced by UVB-irradiation. Hairless mouse were topically treated with the basic lotion alone (control), ascorbic acid (AA-0.5%, AA-1.0%, AA-2.0%, and AA-5.0%) and mugwort extract (ME-0.5%, ME-1.0%, ME-2.0%, and ME-5.0%) dissolved in a basic lotion. After topical treatment of 30 minutes, the animals were irradiated with increasing doses of UVB radiation ($60{\sim}100\;mJ/cm^2$) for 4 weeks. In our experimental condition, skin thickness of hairless mouse was significantly decreased ($12.5{\sim}21.4%$) in all ME groups compared with control group. Ra value, that is surface roughness parameter induced by skin wrinkling, was significantly decreased ($23.7{\sim}31.1%$) in ME-1.0%, 2.0% and 5.0% group compared with control group. Furthermore, Rq, Rz and Rt value were significantly decreased to $11.2{\sim}21.2%$, $19.8%{\sim}24.5%$, and $14.2%{\sim}22.7%$, respectively. Wrinkle formation of ascorbic acid treatment group as reference group was inhibited, but its effect was less than ME treatment. Matrix metalloproteinase-1 activity was significantly inhibited ($19.7{\sim}22.6%$) compared with control group and collagen content was significantly increased (about 10%) when compared with control group. These results indicate that ME could protect skin aging and wrinkle formation in hairless mouse from photo-irradiation.

• Journal of Sensor Science and Technology
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• v.10 no.6
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• pp.328-337
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• 2001

The stochiometric mix of evaporating materials for the $CdGa_2Se_4$ single crystal thin films was prepared from horizontal furnace. To obtain the single crystal thin films, $CdGa_2Se_4$ mixed crystal was deposited on thoroughly etched semi-insulating GaAs(100) substrate by the Hot Wall Epitaxy (HWE) system. The source and substrate temperature were $630^{\circ}C$ and $420^{\circ}C$, respectively. The crystalline structure of single crystal thin films was investigated by the photoluminescence and double crystal X-ray diffraction (DCXD). The carrier density and mobility of $CdGa_2Se_4$ single crystal thin films measured from Hall effect by van der Pauw method are $8.27{\times}10^{17}cm^{-3}$, $345\;cm^2/V{\cdot}s$ at 293 K, respectively. From the photocurrent spectrum by illumination of perpendicular light on the c-axis of the $CuInSe_2$ single crystal thin film, we have found that the values of spin orbit splitting ${\Delta}So$ and the crystal field splitting ${\Delta}Cr$ were 106.5 meV and 418.9 meV at 10 K, respectively. From the photoluminescence measurement on $CdGa_2Se_4$ single crystal thin film, we observed free excition ($E_x$) existing only high quality crystal and neutral bound exiciton ($D^{\circ}$, X) having very strong peak intensity. Then, the full-width-at -half-maximum(FWHM) and binding energy of neutral donor bound excition were 8 meV and 13.7 meV, respectivity. By Haynes rule, an activation energy of impurity was 137 meV.

• Animal Bioscience
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• v.34 no.1
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• pp.109-118
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• 2021

Objective: The objective of this study was to determine net energy (NE) of expeller-press (EP-RSM) and solvent-extracted rapeseed meal (SE-RSM) and to establish equations for predicting the NE in rapeseed meal (RSM) fed to growing pigs. Methods: Thirty-six barrows (initial body weight [BW], 41.1±2.2 kg) were allotted into 6 diets comprising a corn-soybean meal basal diet and 5 diets containing 19.50% RSM added at the expense of corn and soybean meal. The experiment had 6 periods and 6 replicate pigs per diet. During each period, the pigs were individually housed in metabolism crates for 16 days which included 7 days for adaption to diets. On day 8, pigs were transferred to respiration chambers and fed their respective diet at 2,000 kJ metabolizable energy (ME)/kg BW0.6/d. Feces and urine were collected, and daily heat production was measured from day 9 to 13. On days 14 and 15, the pigs were fed at 890 kJ ME/kg BW0.6/d and fasted on day 16 for evaluation of fasting heat production (FHP). Results: The FHP of pigs averaged 790 kJ/kg BW0.6/d and was not affected by the diet composition. The NE values were 10.80 and 8.45 MJ/kg DM for EP-RSM and SE-RSM, respectively. The NE value was positively correlated with gross energy (GE), digestible energy (DE), ME, and ether extract (EE). The best fit equation for NE of RSM was NE (MJ/kg DM) = 1.14×DE (MJ/kg DM)+0.46×crude protein (% of DM)-25.24 (n = 8, R2 = 0.96, p<0.01). The equation NE (MJ/kg DM) = 0.22×EE (% of DM)-0.79×ash (% of DM)+14.36 (n = 8, R2 = 0.77, p = 0.018) may be utilized to quickly determine the NE in RSM when DE or ME values are unavailable. Conclusion: The NE values of EP-RSM and SE-RSM were 10.80 and 8.45 MJ/kg DM. The NE value of RSM can be well predicted based on energy content (GE, DE, and ME) and proximate analysis.