• Bulletin of the Korean Chemical Society
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• 제25권5호
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• pp.673-675
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• 2004

The tetranuclear copper(II) cluster compound $[Cu_4OCl_6(C_{14}H_{12}N_2)_4]$ has been synthesized by hydrothermal reaction and studied by X-ray diffraction. The four copper(II) atoms locate four capsheaves of a tetrahedral skeletal structure and a oxygen atom as interstitial atom occupies the center position of the same tetrahedron, and each edge of the Cu-Cu tetrahedron is bridged by one ${\mu}_2$-Cl anion. The copper atom possesses slightly distorted trigonal bipyramidal geometry with three ${\mu}_2$-Cl atoms in equatorial position and the interstitial O atom and one N atom from 3-benzyl-benzimidazole ligand occupying axial position. The Cu-Cu distances are in the range of 3.0986-3.1162 ${\AA}$. The EPR spectrum suggested that the copper(II) ground state $d_{x2-y2}$ and the coordination geometry was trigonal bipyramidal.

• Journal of Microbiology and Biotechnology
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• 제27권11호
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• pp.1897-1906
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• 2017

Swainsonine (SW) is the principal toxic ingredient of locoweed plants that causes locoism characterized by a disorder of the nervous system. It has also received widespread attention in the medical field for its beneficial anticancer and antitumor activities. Endophytic fungi, Alternaria sect. Undifilum oxytropis isolated from locoweeds, the plant pathogen Slafractonia leguminicola, and the insect pathogen Metarhizium anisopliae, produce swainsonine. Acquired SW by biofermentation has a certain foreground and research value. This paper mainly summarizes the local and foreign literature published thus far on the swainsonine biosynthesis pathway, and speculates on the possible regulatory enzymes involved in the synthesis pathway within these three fungi in order to provide a new reference for research on swainsonine biosynthesis by endophytic fungi.

• Smart Structures and Systems
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• 제18권1호
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• pp.93-115
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• 2016

A particle tuned mass damper (PTMD) system is the combination of a traditional tuned mass damper (TMD) and a particle damper (PD). This paper presents the results of an experimental and analytical study of the damping performance of a PTMD attached to the top of a benchmark model under wind load excitation. The length ratio of the test model is 1:200. The vibration reduction laws of the system were explored by changing some system parameters (including the particle material, total auxiliary mass ratio, the mass ratio between container and particles, the suspending length, and wind velocity). An appropriate analytical solution based on the concept of an equivalent single-unit impact damper is presented. Comparison between the experimental and analytical results shows that, with the proper use of the equivalent method, reasonably accurate estimates of the dynamic response of a primary system under wind load excitation can be obtained. The experimental and simulation results show the robustness of the new damper and indicate that the damping performance can be improved by controlling the particle density, increasing the amount of particles, and aggravating the impact of particles etc.

• 대한한방부인과학회지
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• 제28권4호
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• pp.57-64
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• 2015

Objectives : To study correlation between Digital Infrared Thermal Imaging, Kupperman’s Index (KI) and Menopause Rating Scale (MRS) of Postmenopausal Women Methods : We analyzed 114 patients visiting Pohang Oriental Hospital from 1 ^st January 2014 to 30 ^th September 2015. The evaluating indexed of this trial were Age, DITI, KI, MRS. Temperature and different of temperature, such as In-dang (HN3), dan-Jung (CV17), gwan-won (CV4), hyup-back (LU4), no-gung (PC8), bock-to (ST31), and tae-chung (LR3). Results : Age was no correlation with DITI, KI, and MRS. There were positive correlation with KI and MRS significantly. DITI was not correlated with Age, KI and MRS, while ⊿T1 (LU4-PC8) was correlated with ⊿T2 (ST31-LR3) and ⊿T3 (CV17-CV4). Conclusions : There were non-significant correlation between DITI and Menopausal scale, but significant correlation in DITI themselves, Menopausal themselves. The More studies ar needed for the more accurate oriental medical diagnosis

• 산업진흥연구
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• 제3권1호
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• pp.73-77
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• 2018

This paper written by Choi Bu based on "Piaohailu". This book consists of 3 volumes and it is his travelogue; Choi Bu has departed from Jeju Island to Naju, Jeolla province in the end of 1487, but it drifted on his way, so arrived to Zhejiang Province, China(Mid-Ming Dynasty) in early 1488. In this place, he interrogated with a reason for Japan pirates, but he released soon. And his waterway journey from Hangzhou to Beijing, he had received the award in Beijing which is the grace of the Emperor;and his land route journey from Beijing through Liaodong to Uiju, Pingan Province. Afterwards, this book had been translated in Japanese, English etc; and it had been awarded an alias of 'Chaoxian's Marco Polo'.From the description of the characters in the Mid-Ming Dynasty in the work of Pyohae-rok, the essay makes a study on the knowledge of ancient Korean scholars to China, and looks at the different social and political aspects and characteristics of the Ming Dynasty from the eyes of Korean scholars. It summarizes that when we face history squarely, it is important to refer to and draw on the foreign works recorded by ancient Korean scholars.

• Bulletin of the Korean Chemical Society
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• 제30권8호
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• pp.1783-1792
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• 2009

Although overlapping resonances have been studied extensively in conventional resonance theories, there have not been many studies on them in multichannel quantum defect theories (MQDT). In MQDT, overlapping resonances occur between the channels instead of states, which pose far greater difficulty. Their systematic treatment was obtained for cases involving degenerate closed channels by applying our previous theory, which decouples background scattering from the resonance scattering in the MQDT formulation. The use of mathematical theory on con-diagonalization and con-similarity was essential for handling the non-Hermitian symmetric complex matrix. Overlapping resonances in rare gas spectra of Ar, Kr and Xe were analyzed using this theory and the results were compared with the ones of the previous alternative parameterizations of MQDT which make the open-open part $K^{oo}$ and closed-closed part $K^{cc}$ of reactance submatrices zero. The comparison revealed that separation of background and resonance scatterings achieved in our formulation in a systematic way was not achieved in the representation of $K^{oo}\;=\;0\;and\;K^{cc}$ = 0 when overlapping resonances are present.

• Journal of Power Electronics
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• 제16권3호
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• pp.872-882
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• 2016

A novel pseudo-continuous conduction mode (PCCM) voltage-fed single-stage power factor correction (PFC) full-bridge battery charger is proposed in this paper. By connecting a freewheeling transistor in parallel with an input inductor, the PFC cell can operate in the PCCM with a constant duty ratio. Thus, the dc/dc stage can be designed using this constant duty ratio and the restriction on the duty ratio of the PFC cell is eliminated. As a result, the input current distortion is less and the dc bus voltage becomes controllable over the wide output power range of the battery charger. Moreover, the operation principle of the dc/dc stage is designed to be similar to that of a conventional phase-shifted full-bridge converter. Therefore, it is easy to implement. In this paper, the operation of the new converter is explained, and the design considerations of the controller and key parameters are presented. Simulation and experimental results obtained from a 1 kW prototype are given to confirm the operation of the proposed converter.

• Bulletin of the Korean Chemical Society
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• 제33권7호
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• pp.2255-2259
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• 2012

Aggregation of titania nanotubes (TNTs) fabricated by hydrothermal method were calcined in air and dry nitrogen; Changes in morphology and crystallinity of the nanotubes were studied by means of TEM, EDX, and XPS. EDX patterns and XPS spectra proved that there were a certain densities of oxygen vacancies in TNTs annealed in $N_2$. The photocatalysis experiments revealed TNTs/$N_2$ possesses significantly higher photocatalytic efficiency than TNTs annealed in dry air to degrade methylene blue. The correlation between oxygen vacancies and photocatalytic property may be attributed to: 1) oxygen vacancies might have affected results on water molecules adsorption and increase of the hydroxyl concentration; and 2) oxygen vacancies resulted in some changes in electronic structure of TNTs/$N_2$ aggregation and Fermi level extends into the conducting band.

• Experimental and Molecular Medicine
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• 제50권11호
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• pp.11.1-11.12
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• 2018

USP15 has been shown to stabilize transcription factors, to be amplified in many cancers and to mediate cancer cell survival. However, the underlying mechanism by which USP15 regulates multiple myeloma (MM) cell proliferation and apoptosis has not been established. Here, our results showed that USP15 mRNA expression was upregulated in MM patients. USP15 silencing induced MM cell proliferation inhibition, apoptosis, and the expression of nuclear and cytoplasmic NF-${\kappa}Bp65$, while USP15 overexpression exhibited an inverse effect. Moreover, in vivo experiments indicated that USP15 silencing inhibited MM tumor growth and NF-${\kappa}Bp65$ expression. PDTC treatment significantly inhibited USP15 overexpression-induced cell proliferation, apoptosis inhibition, and NF-${\kappa}Bp65$ expression. USP15 overexpression promoted NF-${\kappa}Bp65$ expression through inhibition of its ubiquitination, whereas NF-${\kappa}Bp65$ promoted USP15 expression as a positive regulator. Taken together, the USP15-NF-${\kappa}Bp65$ loop is involved in MM tumorigenesis and may be a potential therapeutic target for MM.

• 한국정보전자통신기술학회논문지
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• 제12권1호
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• pp.92-98
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• 2019

본 논문에서는 몰포러지 연산을 기본으로 하는 몰포러지 신경망(MNN: Morphological Neural Network) 기반 딥러닝 시스템을 제안하였다. 딥러닝에 사용되는 레이어는 몰포러지 레이어, 풀링 레이어, ReLU 레이어, Fully connected 레이어 등이다. 몰포러지 레이어에서 사용되는 연산은 에로전, 다이레이션, 에지검출 등이다. 본 논문에서 새롭게 제안한 MNN은 기존의 CNN(Convolutional Neural Network)을 이용한 딥러닝 시스템과는 달리 히든 레이어의 수와 각 레이어에 적용되는 커널 수가 제한적이다. 레이어 단위 처리시간이 감소하고, VLSI 칩 설계가 용이하다는 장점이 있으므로 모바일 임베디드 시스템에 딥러닝을 다양하게 적용할 수 있다. MNN에서는 제한된 수의 커널로 에지와 형상검출 등의 연산을 수행하기 때문이다. 데이터베이스 영상을 대상으로 행한 실험을 통해 MNN의 성능 및 딥러닝 시스템으로의 활용 가능성을 확인하였다.