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김영식,주영승,Kim, Young-Sik,Ju, Young-Sung 대한본초학회 2016 大韓本草學會誌 Vol.31 No.4
Objectives : This study is to propose discriminative keys with stereoscope for minute seed herbs easily mixed up, but hard to discriminate by naked eyes: Alli Tuberosi Semen(ATS)?Alli Fistulosi Semen(AFS), Malvae Semen(MS)? Abutili Semen(AS), Plantaginis Semen(PS)?Schizonepetae Semen(SS).Objectives : We reviewed the description of original plants and medicinal herbs from literature. The specimen of original plant were collected, determinated and compared to samples in the market. Primary classification was performed with naked eyes. and we found out other discrimination keys for non-distinctive herbs with stereoscope. Discrimination keys were set as the morphological criteria of authentic herbs, percentage of adulteration, and standards for discriminating genuine herbs from adulteration.Results : 1) ATS is bigger, has reticulate pattern on protuberant side and unique garlic chives taste. AFS which is usually mixed up, is smaller, has 1~2 ridges and unique welsh onion taste. 2) MS is smaller, has no villus, but its length of bumps are similar. AS easily mixed up, is bigger and has white villus. Its upper side bump is longer and more sharp. 3) PS has dent at middle of the back side. It becomes very sticky when it is put or boiled in water. SS which can be mixed up has no dent and low viscosity compared to PS.Conclusions : With this result, we propose discriminative keys which can identify the original plants and processed herbal state of six herbs. Because minute medicinal herbs are hardly distinguishable by sensory test, It is essential to differentiate by using stereoscope.
김영식,정정수,노종선,정하봉,김경아,Kim Young-Sik,Chung Jung-Soo,No Jong-Seon,Chung Habong,Kim Kyung-ah 한국통신학회 2005 韓國通信學會論文誌 Vol.30 No.8C
이 논문에서는 Sidel`nikoc 수열의 자기상관 분포, 다시 말해 자기상관 함수 각각의 값들의 발생 회수를 유도하였다. M-진 Sidel`nikov 수열의 각각의 상관 값들의 발생 회수는 M차의 원분수를 이용하서 표현된다. 또한 서로 다른 자기 상관 값들의 총 개수는 알파벳 크기 M뿐만 아니라 수열의 주기에도 의존하지만 언제나 ($\frac{M}{2}$)+1보다 작거나 같다는 사실을 보였다. In this paper, we derived the autocorrelation distributions, i.e., the values and the number of occurrences of each value of the autocorrelation function of Sidel'nikov sequences. The frequency of each autocorrelation value of an M-ary Sidel'nikov sequence is expressed in terms of the cyclotomic numbers of order M. It is also pointed out that the total number of distinct autocorrelation values is dependent not oかy on M but also on the sequence, but always less than or equal to ($\frac{M}{2}$)+1.
Ni 계 초내열합금의 PTA 오버레이 층 특성에 관한 연구
김영식,최영국,이광렬,Kim Young-Sik,Choi Young-Goog,Lee Kwang-Ryeol 대한용접접합학회 2006 대한용접·접합학회지 Vol.24 No.3
The Plasma Transferred Arc (PTA) overlaying method is lately introduced as one of the most useful surface modification method of the engine component. In this paper, the characteristics of the Co-base and Ni-base super alloy overlay layers by PTA method were investigated through the metallurgical, abrasive and cavitation erosion test. Experimental results showed that the abrasive wear resistance of the Co-base Stellite 6 overlayer was the most superior and followed in order of Nimonic 80A, Inconel 625 and Inconel 718. However, the cavitation erosion characteristic of the Stellite 6 overlayer was the most inferior and it was better in order of Inconel 625, Inconel 718 and Nimonic 80A.
김영식,장성수,이선영,진원혁,조일주,남효진,부종욱,Kim Young-Sik,Jang Seong-Soo,Lee Caroline Sun-Young,Jin Won-Hyeog,Cho Il-Joo,Nam Hyo-Jin,Bu Jong-Uk 정보저장시스템학회 2006 정보저장시스템학회논문집 Vol.2 No.2
In this research, a wafer-level transfer method of cantilever away on a conventional CMOS circuit has been developed for high density probe-based data storage. The transferred cantilevers were silicon nitride ($Si_3N_4$) cantilevers integrated with poly silicon heaters and piezoelectric sensors, called thermo-piezoelectric $Si_3N_4$ cantilevers. In this process, we did not use a SOI wafer but a conventional p-type wafer for the fabrication of the thermo-piezoelectric $Si_3N_4$ cantilever arrays. Furthermore, we have developed a very simple transfer process, requiring only one step of cantilever transfer process for the integration of the CMOS wafer and cantilevers. Using this process, we have fabricated a single thermo-piezoelectric $Si_3N_4$ cantilever, and recorded 65nm data bits on a PMMA film and confirmed a charge signal at 5nm of cantilever deflection. And we have successfully applied this method to transfer 34 by 34 thermo-piezoelectric $Si_3N_4$ cantilever arrays on a CMOS wafer. We obtained reading signals from one of the cantilevers.
김영식 대구보건대학 1996 대구보건대학 論文集 Vol.16 No.-
앞으로 정보화사회는 기존의 매체에 다른 매체들과 통신이 어우러진 복합적인 양상을 보이고 있고 수용자도 수동적인 매체접촉형태에서 능동적이고 적극적인 접촉형태를 보여주고 있다. 특히 정보화시대에 주목받는 뉴미디어 중에서 케이블 텔레비전은 수용자의 폭넓은 채널선택과 지방자치시대에 지역성을 실현할 수 있는 매체로 손꼽고 있다. 따라서 정보화시대에 케이블 텔레비전의 역할과 정보화 사회로 인한 사회변화를 살펴보고자 한다.
초내열합금분말에 의한 PTA 오버레이부의 연삭 마모 특성 연구
김영식,최영국,임창훈,김종도,Kim, Young-Sik,Choi, Young-Gook,Lim, Chang-Hoon,Kim, Jong-Do 대한용접접합학회 2009 대한용접·접합학회지 Vol.27 No.3
The Plasma Transferred Arc (PTA) overlay welding method is lately introduced as one of the most useful surface overlay method of the engine component. In this paper, the overlay welding on the SNCrW heat resisting alloy was conducted by the PTA overlay welding process using the super alloy powder. The characteristics of the overlay layers were investigated through the metallurgical and abrasive test. Experimental results showed that the overlay on the SNCrW heat resisting alloy surface was successfully made without hot cracking. The friction wear characteristics of the Co-base Stellite 6 overlayer were most superior. However the abrasive wear characteristics were most inferior in the Co-base Stellite 6 overlayer.
On the Rotational Barrier of Organic Molecules (I). Role of Axial Carbon in Ethane
김영식,김호징,Young Sik Kim,Hojing Kim Korean Chemical Society 1982 대한화학회지 Vol.26 No.3
에탄의 회전 장벽에 미치는 두개의 탄소 원자의 영향을 알아보기 위해 6개의 수소만으로 이루어진 탄소가 없는 에탄올 모델로 택하여 이 모델 분자의 Staggered 및 eclipsed꼴의 에너지를 McWeeny의 open-shell RHF-SCF방법으로 계산하고,staggred에서 eclipsed로 꼴이 변할때의 천이밀도를 조사 하였다. 예상대로 모델 분자에서는 ecliped꼴이 staggered꼴보다 안정하였다. 이 탄소없는 에탄의 천이 밀도와 실제 에탄의 천이 밀도를 비교 분석하여, 에탄의 회전 장벽은 중심축 위치에 있는 두개의 탄소 원자로 인해 staggered에서 eclipsed꼴로 변함에 따라 수소 원자 주위의 전자 밀도가 희석되고, 탄소 원자 주위와 탄소-탄소 결합 공간으로 끌리므로 해서, 전자 에너지 감소가 핵간 반발 에너지의 증가를 상쇄하지 못하는데 기인한다는 것을 알게 되었다. In order to analyze the role of axial carbon atoms in rotational barrier of ethane, we take the carbonless ethane, as a model, which is made of six hydrogens in coordinates of ethane. The energy of the system is calculated by McWeeny's open-shell restricted Hartree-Foch selfconsistent-field (RHF-SCF) method, and the transition density on the staggered-to-eclipsed rotation is examined. As being expected, the eclipsed form of the model is more stable than the staggered one. Through the transition density comparison of this model and real ethane, it is found that the existence of the axial carbon atoms induces the electronic density to be diluted in the vicinity of protonic sites and to be attracted to the region of carbon atoms or further to C-C bond region as the barrier is traversed. This migration of electronic charge tell us that the barrier to the internal rotation of ethane originates from the fact that the magnitude of electronic energy depression is not large enough to offset the increased nuclear-nuclear repulsion on the staggered-to-eclipsed rotation.