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정명덕,김민호,변건식 동아대학교 공과대학 부설 한국자원개발연구소 1995 硏究報告 Vol.19 No.1
For FH-SS communication, We discussed the method of indirect synthesizer in several methods. The problem of single frequency synthesizer using with PLL is a varied coefficient value of damping factor in frequency hopping time, which is caused unstable frequency. So, for stable frequency synthesizer, a coefficient of damping factor must be optimized and synthesized to be removed excessive response time. In this paper, we studied FH using with 2 loop frequency synthesizer which takes stable frequency, we made up simulator and had a good performance(real time speed).
유은정,김종덕,송상호,임현수,최명락,정규화 여수대학교 1997 論文集 Vol.11 No.2
The purpose of this investigation was to develop a new carrier using chitin and glucan as the model for Aspergillus oryzae cell wall. In case of the ratio of chitin and glucan(3/1), the activity of the immobilized protease had higher than that of model(chitin/glucan=1/3) and carriers were formed gel. In case of soluble chitin and glucan treated with calcium carbonate, there were a 1.8-fold increase in activity of immobilized protease compared with untreated chitin. The scanning electron microscope image showed that a pore size of this carrier had a homogenized pore size and a smooth surface.
김성곤,최희주,정명덕,변건식 東亞大學校 附設 情報通信硏究所 1998 情報通信硏究所論文誌 Vol.6 No.1
A synchronization is important element not only wire communication but also wireless communication. Especially, In SS(Spread Spectrum) communication method used GPS(Global Positioning System) synchronization is more important. A synchronous oscillator(SO) is a network which synchronizes, tracks, filter, amplifies and divides (if necessary) in a single process. Without an input signal, the SO is a free-running oscillator, oscillating at a frequency w??, but phase changes 180。 within tracking range of SO. Therefore CPSO was used for this problem. The coherent phase synchronous oscillator(CPSO) is created by adding two external loops to the SO and has a wider tracking bandwidth and a zero-offset phase response (coherent) while maintaining the SO properties of high signal-to-rejection and fast frequency acquisition times. Therefore phase between input signal and output signal is synchronized. In this paper, GPS data recovery circuit has applied CPSO using front reference characters and has certified and excellent data recovery capability.
Seo, Myeong Deok,Kim, Aran,Jung, Hyun Elsevier 2019 Journal of solid state chemistry Vol.269 No.-
<P><B>Abstract</B></P> <P>Co metal nanoparticle incorporated graphene nanohybrids were successfully synthesized <I>via</I> a simple decomposition reaction of the metal precursor, dicobalt octacarbonyl (Co<SUB>2</SUB>(CO)<SUB>8</SUB>), in the presence of the mesoporous graphene (MG) for enhanced hydrogen storage performance. As a host material, MG, which has a three-dimensional interconnected pore structure (S<SUB>BET</SUB> of 860 m<SUP>2</SUP> g<SUP>−1</SUP>, pore size of 6.3 nm), can provide a facile diffusion pathway to electroactive species, along with an appropriate pore size for immobilizing Co metal nanoparticles. According to the XRD and TEM analyses, after hybridization, the cubic phased Co metal nanoparticles were homogeneously dispersed and stabilized on the surface of the host MG with sizes of 5.3 nm. According to the measurement of the electrochemical hydrogen storage, the discharge capacity of the obtained sample exhibited 250 mAh g<SUP>−1</SUP> with good cyclic stability, caused by the synergetic effect of the MG and Co metal nanoparticles.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Cobalt incorporated mesoporous graphene nanohybrids (Co-MGs) are synthesized. </LI> <LI> The amount of Co<SUB>2</SUB>(CO)<SUB>8</SUB> is controlled to find optimal condition for hydrogen storage. </LI> <LI> Nanohybrids show synergetic effect for electrochemical hydrogen storage. </LI> <LI> Optimal material of Co-MG-45 have high discharge capacity and good cycle stability. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>Cobalt metal nanoparticles incorporated mesoporous graphene nanohybrids were successfully synthesized. Co metal nanoparticles were homogeneously dispersed and immobilized on the surface of the host MG with sizes of 5 nm. The optimal condition for hydrogen storage material is Co-MG-45, which has both high discharge capacity (250 mAh g<SUP>−1</SUP>) and good cycle stability (80% after 20 cycle), caused by the synergetic effect of the MG and Co metal nanoparticles.</P> <P>[DISPLAY OMISSION]</P>
스마트 거울의 제작을 통해 이루어진 공학 교육 실천 방법론에 관한 연구
서명덕 ( Myeong-deok Seo ),권지영 ( Ji-young Kwon ),장은영 ( Eun-young Chang ) 한국실천공학교육학회 2018 실천공학교육논문지 Vol.10 No.1
음성 인식 기반 API를 이용하여 디지털 사이니지(Digital Signage)를 구성하고, 상용화된 다른 제품들과 차별되도록 사용자의 음성 명령으로 날씨, 지도, 운동 정보, 일정, 영상 등의 정보를 얻는 VRSM(Voice Recognition Smart Mirror)을 제안하여, 독자적인 졸업인증제의 결과물로 평가받는 과정을 통해, 공학교육의 효과적인 실천 방안을 제시한다. 전공에서 2인 1조로 3학기동안 진행되는 작품 설계 및 제작 기회를 경험하였다. 종합설계를 통해 공학적 접근 방법과 창의적 사고 기회를 경험하였으며, 그 중간 결과에 대해 본 학회의 학술대회에 참가하여 우수 학술상을 수상하였고, 기타 학회의 논문 경진대회에서도 입상의 결과를 얻었다. 이 과정을 통해 얻어진 실무 능력의 향상이 자신감과 취업 기회 획득에 유리함을 실제 취업들을 통해 입증하였다. A digital signage is constructed using a speech recognition based API, and VRSM (Voice Recognition Smart Mirror) that obtains information such as weather, map, exercise information, schedule, and image by user’s voice command so as to be different from other commercialized products is proposed. This course provides an effective method of engineering education through the process of being evaluated as the result of independent graduation certification system, and also it had been the opportunity to design and produce works for 3 semesters by 2 students one group in the majors. Through the comprehensive capstone design, it has experienced engineering approach and creative thinking opportunity. We have won the best academic prize by participating in the academic conferences of the institute about the interim result, and obtained the results of the prize contest in other academic conferences. The improvement in practical skills obtained through this process proved to be beneficial for self-confidence and job-seeking opportunities through actual employment.
악성 질 흑색종 광범위 국소 질 및 직장 절제술의 시도
서명덕(Myeong Deok Seo),이영희(Young Hee Lee),정소용(So Yong Jung),이종민(Jong Min Lee),박찬용(Chan Yong Park),최유덕(Yu Duk Choi),조현이(Hyun I Cho) 대한산부인과학회 1999 Obstetrics & Gynecology Science Vol.42 No.8
Primary malignant melanoma of the vagina is an exceedingly rare entity, accounting for about 3% of all primary vagina1 malignant tumors and 0.3% of all melanoma. The overall 5-year survival in patients with primary vaginal melanoma is notoriously poor, estimated to be between 13% and 19%. A case of primary malignant melanoma of the vagina treated with the wide local excision of vagina and rectum was presented with a brief review of literature.
안명덕 ( Myeong Deok An ) 21세기영어영문학회 2016 영어영문학21 Vol.29 No.2
Philip Larkin says “I write poems to preserve things I have seen/thought/felt both for myself and for others [. . .].” He wants to provide British people who are losing their sense of self with an opportunity to experience Britishness through his poetry. To Larkin, Britishness is not related to laws and institutions, but to the life, identity, history and culture of the British. Thus, for Larkin, an experience is a journey to find out the meaning of Britishness. His poetry, expressed through everyday language, makes readers naturally experience and sympathize with Britishness. “Church Going”, one of his poems, shows one speaker’s journey in search of answers from a church that still gets people to visit, even though it has lost its religious meaning. The speaker leads readers into the poem, visits a church with them and thinks of the meaning and value of the church. Although the church has lost its meaning as a space of religion, the place still has value as a root for Britishness by preserving British people’s lives and history. On this account, British people will go to church as a place to confirm their identities, and consequently, churches will also maintain their value to exist.
증례보고 : 어려운 기도에서 굴곡성 기관지경을 사용한 경비 기관내삽관 시 효과적인 비출혈 제거
김명환 ( Myeong Hwan Kim ),손지선 ( Ji Seon Son ),임형선 ( Hyung Sun Lim ),김덕규 ( Deok Kyu Kim ),김동찬 ( Dong Chan Kim ) 대한마취과학회 2008 Korean Journal of Anesthesiology Vol.55 No.5
Nasal bleeding related to nasal trauma is the most common complication of nasotracheal intubation with a fiberoptic scope. When nasotracheal intubation with a fiberoptic scope is performed, profuse bleeding from the nasal cavity makes it difficult to handle a fiberoptic scope and may cause a hypoxemia. So when nasal bleeding occurs, it is important to suction the nasal cavity for easy handling of a fiberoptic scope. But, it may be difficult to suction in a nasal cavity with a fiberoptic suction port only. We report a patient with nasal bleeding following nasotracheal intubation with a fiberoptic scope because of articular trismus, and successful nasotracheal intubation utilizing a fiberoptic scope by suctioning with an extra suction apparatus. (Korean J Anesthesiol 2008;55:618~20)