• Archives of Pharmacal Research
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• 제28권6호
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• pp.680-684
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• 2005

Ginseng, the root of Panax ginseng CA Meyer, is well known as a tonic medicine for restoring and enhancing human health. In traditional medicine, ginseng is utilized for the alleviation of emesis, which includes nausea and vomiting. However, it has not yet been demonstrated whether ginseng exhibits in vivo anti-nausea and anti-vomiting properties. In this study, we examined the anti-emetic effect of Korean red ginseng total extract (KRGE) on cisplatin-induced nausea and vomiting using ferrets. Intraperitoneal administration (i.p.) of cisplatin (7.5 mg/kg) induced both nausea and vomiting with one-hour latency. The episodes of nausea and vomiting reached a peak after 1.5 h and persisted for 3 h. Treatment with KRGE via oral route significantly reduced the cisplatin-induced nausea and vomiting in a dose-dependent manner. The anti-emetic effect was 12.7 $\pm$ 8.6, 31.8 $\pm$ 6.9, and 67.6 $\pm$ 4.0$\%$ with doses of 0.3, 1.0, and 3.0 g/kg of KRGE, respectively. Pretreatment with KRGE via oral route 1 and 2 h before cisplatin administration also significantly attenuated the cisplatin-induced nausea and vomiting. However this did not occur with a pretreatment 4 h before cisplatin administration. These results are supportive of KRGE being utilized as an anti-emetic agent against nausea and vomiting caused by chemotherapy (i.e. cisplatin).

• Investigative Magnetic Resonance Imaging
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• 제22권2호
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• pp.94-101
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• 2018

Purpose: To determine the value of the appearance of the high signal intensity halo sign for detecting carotid intraplaque hemorrhage (IPH) on maximum intensity projection (MIP) of time-of-flight (TOF) MR angiography (MRA), based on high signal intensity on magnetization-prepared rapid acquisition with gradient-echo (MPRAGE) sequencing. Materials and Methods: A total of 78 carotid arteries in 65 patients with magnetization-prepared rapid acquisition gradient-echo (MPRAGE) positive on carotid plaque MR imaging were included in this study. High-resolution MR imaging was performed on a 3.0-T scanner prior to carotid endarterectomy or carotid artery stenting. Fast spin-echo T1- and T2-weighted axial imaging, TOF, and MPRAGE sequences were obtained. Carotid plaques with high signal intensity on MPRAGE > 200% that of adjacent muscle on at least two consecutive slices were defined as showing IPH. Halo sign of high signal intensity around the carotid artery was found on MIP from TOF MRA. Continuous and categorical variables were compared among groups using the Mann-Whitney test and Fisher's exact tests. Results: Of these 78 carotid arteries, 53 appeared as a halo sign on the TOF MRA. The total IPH volume of patients with a positive halo sign was significantly higher than that of patients without a halo sign ($75.0{\pm}86.8$ vs. $16.3{\pm}18.2$, P = 0.001). The maximum IPH axial wall area in patients with a positive halo sign was significantly higher than that of patients without a halo sign ($11.3{\pm}9.9$ vs. $3.7{\pm}3.6$, P = 0.000). Conclusion: High signal intensity halo of IPH on MIP of TOF MRA is associated with total volume and maximal axial wall area of IPH.

• International journal of advanced smart convergence
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• 제4권1호
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• pp.35-39
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• 2015

This study was presented the small action by the budge sonance function. An estimation of budge sonance function was acquired displacements across all condition with a variation of small action. The budge sonance function was to be indicated to express the flow rate of body motion. Their function was suggested an issue of the action condition by budge sonance. This system was proposed a combination of the body motion and small action. The acquired sonance signal was to render the small action of body motion with budge sonance function. The analysis of budge function was generally realized a variation from displacements on the fast body motion. Budge sonance signal of action that vision condition was acquired to a variation of the $Vi-{\beta}_{AVG}$ with $(-4.954){\pm}(-5.42)$ units, that vestibular condition was acquired to a variation for the $Ve-{\beta}_{AVG}$ with $(-2.288){\pm}0.212$ units, that somatosensory condition was acquired to a variation for the $So-{\beta}_{AVG}$ with $(-0.47){\pm}0.511$ units, that CNS condition was acquired to a variation for the $C-{\beta}_{AVG}$ with $(-0.171){\pm}(-0.012)$ units. Budge sonance function was proposed the small action from axial action on body control. We know a body motion response from axial action was not only variation of budge sonance, but also body motion of fast body motion.

• 한국전자통신학회논문지
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• 제8권4호
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• pp.541-547
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• 2013

레이더에서 거리분해능은 정확한 목표물 구분을 위해 판단하는 중요한 성능 파라미터이다. 기존의 아날로그 방식의 레이더시스템의 한계를 극복하기 위해, 현대 레이더 시스템 설계 목표는 적은 전송전력으로 거리분해능을 향상시키는 것으로 펄스압축기술에 대한 연구가 활발히 이루어지고 있다. 수신단에서 목표물 구분을 위해 펄스압축기술에 사용되는 송신신호의 변조방식은 크게 FM방식과 PM방식으로 나뉠 수 있다. 본 논문에서는 PM방식인 Barker Code를 이용하여 펄스압축 신호처리모듈을 구현하고 분석하였다.

• 한국컴퓨터정보학회논문지
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• 제3권2호
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• pp.77-84
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• 1998

요즈음 CMOS 기술의 발전에 의해서 연속시간 신호시스템이 매우 각광을 받고 있다. 따라서 이 논문에서는 음성신호 처리영역에서 동작하는 CMOS floating 저항을 이용한저역통과 필터를 설계하였다. 특히 이 논문에서는 포화영역에서 동작하는 all CMOS floating 저항을 설계하였으며, $\pm$1V 영역에서 $\pm$0.04%의 선형성이 얻어졌다. 주파수 응답은10MHz를 초과하였으며 능동 RC회로의 집적화에 매우 유용할것으로 생각한다. 이 방법에 의해 설계도니 저역통과필터는 SC 필터보다 그 구조가 간단하므로 IC의 형태로 만들 때 칩 면적을 많이 줄일 수 있다. 설계된 필터의 특성은 pspice에 의해 시뮬레이션 하였으며, 그 특성이 우수함이 입증되었다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제11권11호
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• pp.5610-5624
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• 2017

A novel scheme based on polarization modulation and the weighted fractional Fourier transform (PM-WFRFT) is proposed in this paper to enhance the physical layer security of dual-polarized satellite systems. This scheme utilizes the amplitude and phase of the carrier as information-bearing parameters to transmit the normal signal and conceals the confidential information in the carrier's polarization state (PS). After being processed by WFRFT, the characteristics of the transmit signal (including amplitude, phase and polarization state) vary randomly and in nearly Gaussian distribution. This makes the signal very difficult for an eavesdropper to recognize or capture. The WFRFT parameter is also encrypted by a pseudo-random sequence and updated in real time, which enhances its anti-interception performance. Furthermore, to prevent the polarization-based impairment to PM-WFRFT caused by depolarization in the wireless channel, two components of the polarized signal are transmitted respectively in two symbol periods; this prevents any mutual interference between the two orthogonally polarized components. Demodulation performance in the system was also assessed, then the proposed scheme was validated with a simulated dual-polarized satellite system.

• 대한전기학회논문지
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• 제40권4호
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• pp.382-393
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• 1991

A DPCM system employing a median predictor, which is called the predictive median-DPCM(PM-DPCM), is proposed. An interesting observation that in PM-DPCM transmission errors are often isolated and not propagated over the reconstructed signal is made, and is analyzed deterministically and statistically. In addition, it is shown that the decoder of the PM-DPCM is always a stable system. In addition, it is shown that the decoder of the PM-DPCM is always a stable system. In order to examine the performance characteristics of PM-DPCM, it is applied to real images. The results indicate that reconstructed images through the PM-DPCM can be better than those through thestandadrd DPCM when transmission errors occur, and that under noise-free conditions the PM-DPCM performs like the standard DPCM.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 1998년도 추계종합학술대회 논문집
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• pp.211-214
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• 1998

The high power amplifier (HPA) for broadcasting transmitter systems has nonlinear property in terms of input signal power. Hence, it produces AM/AM and AM/PM modulation to the modulated signal. Therefore, the non-linearity results in bandwidth expansion and nonlinear distortion to in-band signal. In this paper, we propose a simple sain-based predistorter that requires less computational burden and less time for the full initialization of the pre-distorter ROM table.

• 대한의용생체공학회:의공학회지
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• 제10권3호
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• pp.285-288
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• 1989

A characteristic proton NMR signal is found in human cancer serums. The signal is given by $6.43{\pm}0.06$ ppm on average. An attempt is made to find a certain correlation between the appearance of the signal and the amounts of CEA and AFP in the serums.

• 한국식품위생안전성학회지
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• 제15권3호
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• pp.248-251
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• 2000

본 연구는 ESR spectroscopy를 이용하여 계란의 방사선 조사여부와 조사선량에 따른 ESR신호의 크기 및 신호의 안정성을 알아보았다. 신선한 계란을 0, 0.5, 1, 2, 3그리고 5 kGy로 방사선을 조사한 후, 난백과 난황 및 내막을 제거한 겉껍질만을 이용하여 신호의 특성을 알아보았다. 실험결과 방사선 조사된 계란은 g$_1$=2.0023$\pm$0.00004, g$_2$=1.9979$\pm$0.00005에서 특유의 비대칭적인 ESR신호를 나타내어 비조사 시료와 확실하게 구별되었으며, 조사선량의 증가에 따른 ESR신호에 대한 회귀식은 y=2.23$\times$10${^7}$x (r${^2}$=0.9661)로서 조사선량에 따라 ESR신호의 크기는 비례적으로 증가하였다. 또한 이들 신호의 크기는 상온과 5$^{\circ}C$이하에서 77일간의 저장기간 후에도 안정하게 남아있어 방사선 조사여부의 판별은 장기간의 저장에서도 가능하였다. 따라서 ESR spectroscopy를 이용한 방사선 조사 계란의 검지방법은 빠르고 확실하며 정량적인 방법으로써 유용한 검지기술임을 알 수 있었다.