• 한국전기전자재료학회논문지
• /
• 제17권9호
• /
• pp.979-982
• /
• 2004

The ZnO thin films were prepared by the FTS (facing target sputtering) system, which enables to provide high density plasma and a high deposition rate at a low working gas pressure. We introduced the AZO thin film in order to improve the crystallographic properties of ZnO thin film because of the AZO(ZnO:Al) thin film has an equal crystal structure to the ZnO thin film. ZnO/AZO thin films were deposited at a different oxygen gas flow ratio, R.T. 2mTorr working pressure and a 0.8A sputtering current. The film thickness and c-axis preferred orientation of ZnO/AZO/glass thin films were measured by ${\alpha}$-step and an x-ray diffraction (XRD) instrument. In the results, we could prepare the ZnO thin film with c-axis preferred orientation of about 6$^{\circ}$ on substrate temperature R.T. at O$_2$ gas flo rate 0.5.

• 대한전기학회:학술대회논문집
• /
• 대한전기학회 2006년도 제37회 하계학술대회 논문집 C
• /
• pp.1523-1524
• /
• 2006

There arc several important issues in AC PDP researches such as cost reduction, reliability, and good image quality. The properties of MgO layer is thought to be one of the most important (actors that affects the panel reliability through the firing voltage variation. The MgO thin film mainly has (111), (200) and (220) crystal orientation. It is reported that (111)-oriented film helps decreasing the discharge voltage, and (200)-oriented film improves the misfiring on high temperature and the image sticking. In this study, we investigated the relations between the crystal orientation and e-beam evaporation process parameters such asdeposition rate, temperature of substrate, and distance between the target(MgO tablet) and the substrate.

• KSII Transactions on Internet and Information Systems (TIIS)
• /
• 제9권10호
• /
• pp.4126-4142
• /
• 2015

Finger vein recognition is a biometric technology using finger veins to authenticate a person, and due to its high degree of uniqueness, liveness, and safety, it is widely used. The traditional Symmetric Local Graph Structure (SLGS) method only considers the relationship between the image pixels as a dominating set, and uses the relevant theories to tap image features. In order to better extract finger vein features, taking into account location information and direction information between the pixels of the image, this paper presents a novel finger vein feature extraction method, Multi-Orientation Weighted Symmetric Local Graph Structure (MOW-SLGS), which assigns weight to each edge according to the positional relationship between the edge and the target pixel. In addition, we use the Extreme Learning Machine (ELM) classifier to train and classify the vein feature extracted by the MOW-SLGS method. Experiments show that the proposed method has better performance than traditional methods.

• 대한전기학회:학술대회논문집
• /
• 대한전기학회 1995년도 하계학술대회 논문집 C
• /
• pp.1245-1247
• /
• 1995

In this paper, Analyzed structual property using SEM and XRD. The longer distance between substrate and target enhance crystalographic orientation of (110)plane, but inhibit growth of (002)plane. Also, deposited ZnO thin film on electrode layer inhibit crystalographic orientation of (002)plane, expecially Al electrode inhibit stronger than Pt layer. And using fabricated transducer, analyzed eletric and frequency characteristics.

• 한국세라믹학회지
• /
• 제33권4호
• /
• pp.441-447
• /
• 1996

Sb doped SnO2(ATO:Antinomy doped Tin Oxide) thin films were prepared by a DC magnetron spttuering method using oxide target and the deposition characteristics were investigated. The experimental conditions are as follows :Ar flow rate : 100 sccm oxygen flow rates ; 0-100 sccm deposition temperature ; 250 -40$0^{\circ}C$ DC sputter powder ; 150~550 W and sputtering pressure ; ; 2~7 mTorr. Deposition rate greatly depends not on the deposition temperature but on the reaction pressure oxygen flow rate and sputter power,. when the sputter powder is low ATO thin films with (110) preferred orientation are deposited. And when the sputter power is high (110) prefered orientation appeares with decreasing of oxygen flow rate and increasing of suputte-ring pressure.

• 로봇학회논문지
• /
• 제15권2호
• /
• pp.131-138
• /
• 2020

This paper proposes a low-cost robotic surgery system composed of a general purpose robotic arm, an interface for daVinci surgical robot tools and a modular haptic controller utilizing smart actuators. The 7 degree of freedom (DOF) haptic controller is suspended in the air using the gravity compensation, and the 3D position and orientation of the controller endpoint is calculated from the joint readings and the forward kinematics of the haptic controller. Then the joint angles for a general purpose robotic arm is calculated using the analytic inverse kinematics so that that the tooltip reaches the target position through a small incision. Finally, the surgical tool wrist joints angles are calculated to make the tooltip correctly face the desired orientation. The suggested system is implemented and validated using the physical UR5e robotic arm.

• 대한전기학회:학술대회논문집
• /
• 대한전기학회 1998년도 추계학술대회 논문집 학회본부 C
• /
• pp.761-763
• /
• 1998

In this paper, Co-Cr thin films which are known for a excellent perpendicular magnetic recording media were prepared. Changing target- substrate distance, Ar gas pressure and arriving atoms, the incident angle and c-axis orientation properties by using the facing targets sputtering system. We evaluated the c-axis dispersion angle by measu ring half-height width with Micro area X-Ray Diffractometer, measured the thickness of thin film with Ellipsometer. The magnetic properties were compared measuring in-plane squareness and perpendicular coercivity with vibrating sample Magnetometer.

• 제어로봇시스템학회논문지
• /
• 제15권8호
• /
• pp.851-858
• /
• 2009

In this study, we propose a new input device using vision technology for positioning of multiple DOFs. The input device is composed of multiple Tags on a transparent table and a vision camera below the table. Vision camera detects LEDs at the bottom of each Tag to derive information of the ID, position and orientation. The information are used to determine position and orientation of remote target DOFs. Our developed approach is very reliable and effective, especially when the corresponding DOFs are from many independent individuals. We show an application example with a SCARA robot to prove the flexibility and extendability.

• The International Journal of Costume Culture
• /
• 제3권3호
• /
• pp.193-200
• /
• 2000

Recently Korean firms are increasingly interested in Internet business while the number of Internet users reaches more than 10 million in Korea. As e-commerce develops rapidly, customer-oriented marketing for online business becomes very important. The issue of how to achieve customer satisfaction in Internet business and how to plan a marketing strategy for online business faced managers of Internet business. Customer-satisfaction is much more important for Internet businesses than for traditional offline 'brick and mortars'. Marketing activities need to be carried out on customer-orientation to achieve high level of customer satisfaction. This paper will discuss how to develop customer-oriented marketing for online business. It will specifically study the characteristics and success factors of Internet business, differences between online marketing and traditional marketing, selection of target market, and online marketing-mix strategy for e-business in view of customer-orientation. Finally it will suggest a future direction for online fashion business by applying the customer-oriented marketing of Internet business to the fashion business.

• 대한공간정보학회지
• /
• 제11권3호
• /
• pp.3-11
• /
• 2003

본 연구는 측량용 디지털 카메라인 Rollei d7 metric과 d7 $metric^{5}$를 이용하여 촬영거리, 수렴각, 촬영방향을 변화시켜가면서 촬영을 실시하였으며, 표정 시 발생하는 오차를 최소화하기 위해 프로그램 상에서 자동적으로 상호표정 되는 원형표지를 이용하였다. 그리고 자료처리체계로는 해석적 방법 중에서 현재 가장 좋은 정도를 얻을 수 있는 광속조정법(bundle adjustment)를 이용하였다. 이러한 연구는 차후 현장에서 요구하는 정도의 사진촬영과 예상되는 정도를 판단하는데 중요한 자료로 이용될 것으로 판단된다.