사용자 인식 스마트 홈 미러

최건영,고성화,김종옥,박은서,김완규,백경동,박동규 순천향대학교 부설 산업기술연구소 2021 순천향 산업기술연구소논문집 Vol.27 No.2

The Internet of Things, the core of the Fourth Industrial Revolution, is growing by incorporating various technologies into various fields. Among them, smart home systems that apply IoT technology to home environments are being actively studied. The home hub market, a means of communication for smart homes, is also developing at the same time. As the home hub market develops, security threats are also increasing accordingly. In this paper, 'Smart Home Mirror' is implemented by combining mirror and IoT technologies so that users can use them to communicate with smart home applications and other devices. To meet security issues, users in it are recognized by using face recognition technology and AES between all data communications in it is applied. The proposed device’s usefulness is approved by implementing it in smart home environments.

콩에서 발생하는 강낭콩일반모자이크바이러스(BCMV)와 땅콩위축바이러스(PSV)의 저항성 평가

이영훈, 윤영남, 강범규, 김현영, 최만수, 구성철, 김현태, 윤홍태, 이수헌, 백인열 忠北大學校 農業科學硏究所 2014 農業科學硏究 Vol.30 No.2

It has been reported several viral diseases in soybean. The occurrence of Bean common mosaic virus and Peanut stunt virus are able to induce severe problem because the main breeding target for viral disease was focused on Soybean mosaic virus. BCMV is a spcies of the genus Potyvirus of the family Potyviridae. BCMV reduces yield by as much as 80% and also adversely affects seed quality in common bean. BCMV has a worldwide distribution because of its high rates 35% of transmission via seeds produced by plants systemically infected prior to bloom. PSV is a species of the genus Cucumovirus of the family Bromoviridae. PSV has been reported to be economically damaging on beans worldwide. Although the virus is reportedly seed transmissible at very low rates, infected plants rarely produce pods with normal viable seeds. The most satisfactory management method of viral diseases such as BCMV and PSV is the use of resistant cultivars and healthy seed. For the overcome of genetic resistance by new virus such as BCMV and PSV, virus diseases monitoring and researches need to study deeply and continually. In this study, we conducted the resistance screen on BCMV and PSV for selection of resistance cultivars. We inoculated on 128 cultivars with PSV and BCMV respectively. These cultivars were classified through pathogenic response such as resistance, necrosis and susceptibility. In addition, 99 and 66 resistant cultivars were confirmed against PSV and BCMV respectively.

방광의 염증성 가종양 1례

정영봉,배준,권명훈,김상익,김경수 大韓泌尿器科學會 2001 Korean Journal of Urology Vol.42 No.3

연장된 연변절개를 이용한 코성형술

윤영석,장태영,김규성 대한이비인후과학회 1999 대한이비인후과학회지 두경부외과학 Vol.42 No.9

船舶所有者 有限責任制度의 個別化 現象

金永祥 又石大學校 1985 論文集 Vol.7 No.-

電解質 溶液의 脫收氣泡塔에서 物質傳達에 관한 硏究

咸榮敏,李相鳳 단국대학교 1984 論文集 Vol.18 No.-

Expermental data on the gas hold-up and oxygen mass transfer coefficient K_La in 5㎝ I.D. continuous countercurrent bubble column with porous gas distributor were obtained with various aqueous electrolyte solution in order to determine the effect of ionic strength on the objective parameters. The data were obtained in a countercurrent flow system in the ranges of gas velocity of 1.1㎝/sec to 5㎝/sec and liquid velocity of 0.3㎝/sec to 0.9㎝/sec. The electrolyte solutions were: K1, KBr, KCl, NaCl, MgCl_2, CaCl_2, MgSO_4, Na_2SO_4, FeCl_3, K_3PO_4. Desorption of oxygen was studied by measuring the concentration of oxygen in the liquid phase. The results showed a definite dependence of gas velocity, liquid flow rate and especially ionic strength on the gas hold-up and oxygen mass transfer in the range of dilute electrolyte solution (I<0.2). A correlation for ε_G and K_La was developed and was shown to correlate the experimental data with an average deviation of 5.3%, 6.7%, respectively.

치과용 자성 어태치먼트의 내구성에 관한 연구

이상훈,정재헌,고영무 대한치과기재학회 1997 대한치과재료학회지 Vol.24 No.1

The purpose of this study was to evaluate the compare the endurance of the commonly used dental magnetic attachments using potentiodynamic polarization method. For this study, 2 kinds of Sm-Co based; Magfit 600 and Magfit 400(G.C.) and 4 kinds of Nd-Fe-B based dental magnetic attachments ; Hicolex Super J(Morita Co.), Magfit EX 600(G.C.), Magfit EX 400(G.C.) and Neomagnet(Preat Corp.) were chosen as a specimen and performed electrochemical corrosion test in 4 electrolyte solutions ; 0.9% NaCl, 1% lactic acid, 0.05% HCI, modified Fusayama's artificial saliva solution. In 4 kinds of electrolyte solutions, the potential scanning was performed starting from -1000mV(SCE) to 1300mV and scan rate was 1.25mV/sec. From this study, we calculated the values of corrosion potential(Ecorr), corrosion rate, pitting potential(Epit), and passivation current density resulted from anodic polarization curves and then obtained physical properties such as changing rate of magnetic flux density, amount of metal ion released, mean average surface roughness values, the changing of surface microhardness values, weight loss of dental magnetic attachments and observed surface of dental magnetic attachments using metallurgical microscope after electrochemical corrosion test. The obtained results were as follows : 1. In potentiodynamic polarization curves, SNM showed the lowest values of pitting potential and the most fast corrosion rate. 2. The amount of released metal was reduced in the order of ME6, SNM, MG4, MG6, ME4 and HSJ and was the greatest in applying the 0.9% NaCl solution and was the least in applying the modified Fusayama's artificial saliva. 3. The order of magnetic flux density was HSJ, MG6, ME6, MG4, ME4, and SNM before corrosion. The decreasing rate of magnetic flux density was the least in case of MG4 and was the greatest in case of SNM after first and second corrosion. The decreasing rate of magnetic flux density of 6 kinds of all magnetic attachments was the least in applying the 1% lactic acid solution. 4. The order of average surface roughness values(Ra) was SNM, MG6, MG4, ME4, ME6 and HSJ before corrosion. Average surface roughness values(Ra) was the greatest in case of SNM and was the least in case of HSJ after first corrosion. ME6 and ME4 showed the greatest increasing rate of average surface roughness values(Ra). 5. The order of average surface microhardness values(V.H.N.) was the least in case of HSJ and was the greatest in case of SNM after first and second corrosion. The decreasing rate of average surface microhardness values of 6 kinds of all magnetic attachments was the least in applying the 1% lactic acid solution. 6. The decreasing rate of weight loss was reduced in the order of ME6, SNM and ME4 after first corrosion and was reduced in the order of ME4, SNM, ME6 after second corrosion. The decreasing rate of weight change showed the greatest in applying the 0.9% NaCl solution and the least in applying the 1% lactic acid after second corrosion. In conclusion, all 6 kinds of dental magnetic attachments showed great decreasing of endurance and much more corrosion resulted in increased the amount of metal ion released, decreased the magnetic flux density, increased the surface roughness values, and highly decreased surface microhardness values and increased the weight loss of dental magnetic attachments. it should be considered that the choice of the commercial dental magnetic attachments was needed properly because their endurance showed differences among each king of products.

거친 표면을 가진 흡수체와 버퍼의 측면에 의한 극자외선 산란효과

권영근,심상진,김종회,김옥경,오혜근 한양대학교 이학기술연구소 2003 이학기술연구지 Vol.6 No.-

마스크 상의 거친 표면을 정의하기 위해서 Monte-Carlo 방법이 적용되었다. 극자외선 마스크의 거친 표면 함수, 즉 power spectral density 에 의해 표현된 무작위적인 표면의 높이 변화는 상면에서의 전기장을 계산하기 위해서 재정의 되었다. Feynmann의 접근 방식과 유사한 산란에 대한 일반식을 유도하였고, 이는 결상과정에서 마스크의 단차상의 거친 측면에 의한 효과를 알아보기 위해서 적용되어졌다. 거친 표면과 완전히 편평한 표면에 대한 전기장의 위상과 진폭 변화 정도를 비교하기 위해서 다중 산람 문제 또한 여러 다른 패턴에 대하여 이 논문에서 다뤄졌다. The Monte-Carlo Method is adopted to define the roughness of the mask structure. A random surface height variation described by power spectral density for the rough surfaces of an estreme ultraviolet (EUV) mask is to be redefined to calculate the field in the image plane. A general explicit formula of the scattering, which is analogous to Feynman's approach, is derived, and it is adapted to the EUV mask structure to evaluate the effect of the surface roughness of the side wall of the mask topography on the image formation. The multiple random scattering problems are dealt with the different pattern types in order to compare field variations in phase and amplitude with the ideal flat surface.

權利濫用論

金永詳 又石大學校 1981 論文集 Vol.3 No.-

The abuse of rights looks like an exercise of rights generally, but it is meant that can not be regarded as an exercise of rights in concrete. The abuse of rights comes out as legal correction against the social evil practices which resulted in exercise of rights as social existence, In brief, it comes out as a relief means against the contradiction of absoluteness of private rights. The legal principles of abuse of rights come out also as a legal technique in the Continental System, and this was at first used as a theory for the adjustment, and balance of rights in opposition, but this had a function to control the private right in the exclusive steps of Captialism. And at first this principles was limitted only to the field of ownership but extended gradually as a principles of control to the whole fields of law. Nowadays, this principles occupies an important role in the legislative policies. In accordance with such a world law trends, our country's Civil Code sets forth in Item 2 of Art. 2 the following provisions that "The rights should not be abused." But nowadays we can see the case that they abuse Item 2 of Art. 2. I made a study of this field. I studied over the theoretical and historical processes for the abuse of rights in our country, too.

등가 Half-bridge모델 공진형 고주파 인버터

배영호,이현우,홍성태,서기영,차영문,권순걸 慶南大學校 附設 工業技術硏究所 1992 硏究論文集 Vol.10 No.-

이 논문은 MOSFET로 구성된 등가 Half-bridge형 고주파공진형 인버어터에 대해 기술하고 있다. 시분할 방식에 의한 게이트회로를 구성하여 구동함으로써 출력단에는 두개의 인버어터에서 동작되는 순시위상이 합성되어 있어 나타나므로 부하단 출력주파수는 소자의 수위칭주파수에 대해 두배가 되고 수위칭 손실이 경감되어 소자의 평균전류가 증가한다. This paper proposes a high frequency resonant inverter consisting of equivalent half bridge model using MOSFET. In this paper time-sharing control method is applied. as a result the output frequency is two times as high as switching frequency of device and average current of device is increased because of decreasing switching loss.