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This paper proposes a geometric shape recognition method for a cuboid-shaped indoor space from a point cloud. We first acquire a point cloud using Visual SLAM for a spherical video. Then, we obtain a geometric model for the indoor space by finding a best-fit cuboid from the point cloud and adjusting it to the real-world environment. The geometric model for the indoor space is updated using the recognized cuboid data. We implemented the proposed method and built a prototype application, which is a simple FPS AR game. Our experiments show that the proposed method provides accurate geometric estimation even when there are a lot of noisy map points in the point cloud.

Sensor Nodes in Ubiquitous Sensor Network (USN) environments are composed of many sensors and hardware components for various purposes and applications, such as service in the industrial field, the public administration sector, and in life services. A middleware is required for wireless sensors to treat a huge amount of information from sensor nodes. However, the use of a middleware and specialized application services could be a big obstacle for the portability of heterogeneous hardware, software platforms, and various methods of information consumption. These problems can be solved by providing an HTTP interface gateway based on a standardized web platform. The web is an open standard that can perform a connecting role for different types of equipment. This article proposes a sensor node middleware to support web-based applications over a Wireless Sensor Network (WSN). We expend a WSN middleware to the web platform by providing an HTTP interface gateway. The gateway makes full duplex possible between sensor nodes and client modules. The processing results of sensor data are then presented to clients by using RIA. Our proposed middleware makes full use of the web platform's advantages and supports a wide range of various applications. The experimental results showed that the proposed middleware efficiently manages sensor nodes, and the response time for collecting sensor data is significantly reduced.

This paper describes on the indirect interface system in which general users assign computer instructions just through the gaze tracing, without mouse or keyboard. We use the web camera to replace the computer-input system. The face region and the eye region was extracted based on Haar classifier implemented on Open source Computer Vision Library (OpenCV). It controls mouse-moving by automatically affecting the position where eyesight focuses on, and simulates mouse-click by affecting blinking action. We use the virtual keyboard displayed on monitor to simulate the keyboard entry. As a result, more than 95% of the tracing accuracy was achieved when the size of a single key is larger than 25 pixels.

Mobile RFID Services will make us recognize the identification code of all kinds of items in which people are interested with the RFID Reader built into a cellular phone. They will also make us search for more detailed information through the mobile internet network.Recently, in Korea, a variety of mobile RFID services are being piloted, and their commercial roll-out is likely to be imminent. The goal of this study is to propose, ahead of the commercial launch of mobile RFID services, a customer satisfaction index model for this service category, and measure customer satisfaction index, so as to derive practical implications for their providers, and pointers related to service improvement. A web survey was conducted on Korean mobile phone subscribers having participated in a mobile RFID pilot program. Using the results of this survey, we tested the customer satisfaction index model we proposed and its hypotheses, by employing a PLS (Partial Least Squares)-based on structural equation modeling technique, and calculated the index. We further conducted an Importance-Performance analysis, to provide implications that may be useful for improving the quality of mobile RFID services.

Korea has studied convergence technology to mount the miniature RFID reader on cellular phone through the mobile RFID forum established in February, 2005 by MIC(Ministry of Information and Communication Republic of Korea) and the relevant organizations. Mobile RFID services will make us recognize the identification code of all kinds of items in which people are interested with the RFID reader built into a cellular phone. They will also allow us to search for more detailed information through the mobile Internet network. Recently, the leading providers of mobile telecommunications in Korea, SKT and KTF, have been providing this as a trial service, and as a result, the commercialization of mobile RFID services will soon be launched. The purpose of this paper is to evaluate the business value for the mobile telecommunications service providers by measuring and forecasting the market value of mobile RFID services with CVM(Contingent Valuation Method), which uses the WTP(Willingness to Pay) of the customer. In Korea, this trial services are as followers: Genuine ginseng verification, U-Portal service, Genuine drug verification, Safe taxi service, Food history service, Korean premium beef verification, Touch book service, McDonaldpsilas touch order service, U-Museum service and so on.

An all-optical frequency up-converter utilizing a four-wave mixing effect in a semiconductor optical amplifier is experimentally demonstrated. In order to characterize a spurious free dynamic range, the third-order inter-modulation distortion signal power is measured by a two-tone test. The spurious free dynamic range of the photonic frequency up-converter is 81 dB-Hz2/3 for the optical LO power of -10 dBm and the optical IF power of -16 dBm. The scheme shows a positive conversion efficiency of 5.77 dB for the optical IF power of -22 dBm and the optical LO power of-13 dBm.

Characteristics of 0.2 mum depletion mode (D) and quasi-enhancement mode (QE) capless InAlAs/InGaAs p-HEMTs having a self-aligned gate (SAG) are reported. The QE SAG capless p-HEMT showed improved output conductance and subthreshold characteristics due to the increased gate-to-channel aspect ratio implemented by using a buried Pt technology. The maximum gm, ION/IOFF, sub-threshold slope, ftau, and fmax of the QE SAG capless p-HEMT were 1.22 S/mm, 2.11 times 105, 65 mV/dec, 210 GHz, and 250 GHz and those of the D SAG capless p-HEMT were 1.12 S/mm, 1.27 times 104, 78 mV/dec, 185 GHz, and 225 GHz, respectively. The QE SAG capless p-HEMT also exhibited a shorter drain delay time than the D SAG capless p-HEMT by about 46%.

Many researches about Binding between Mobile IPv6 techniques and Wireless MAC are ongoing. But, Studies related to security hardly ever are conducted. In paper last time, we proposed Optimized Cryptographic Binding Protocol (OCBP)[2]. OCBP that bind between IEEE 802.16e Security Protocol (PKMv2 EAP method) [1] and MIPv6 AAA bootstrapping authentication procedure [15][17] supports more efficient authentication/Key distribution than non-binding case. We propose on "Extended OCBP scheme" for becoming higher than basic OCBP security level.

In the mobile telecommunication network, the expansion in Internet traffic will cause the demand for IP addresses. Further WiBro will also stimulate the interworking for IP addresses. In fact, many working groups are designing an adaptation mechanism between WiBro and IPv6/MIPv6. Accordingly, from the viewpoint of security, interworking between 802.16e and MIPv6 is essential. In this paper, we propose a secure and efficient OCBP(Optimized Cryptographic Binding Protocol) between Layer 2 and Layer 3 of WiBro system.

The transmission laser bonding (TLB) technique can not only satisfy wafer level bonding requirements but also be directly implemented into the existing semiconductor production line. Using a nanosecond pulsed Nd:YAG laser, Pyrex glass-to-silicon wafers were successfully bonded by uniformly spaced individually bonded spots. The bond strength resulting from use of the TLB technique is comparable to the strength of the bond produced by bonding techniques currently used in microsystem or micro-electro-mechanical system (MEMS) packaging. In addition to packaging, the TLB technique can also be used to conveniently assemble and encapsulate miniature devices with selective bonding areas. In this paper, the continuous line bonding produced by the TLB technique has been implemented and characterized using various sets of bonding conditions. In this paper, TLB is used to make continuous line bonding of Pyrex and silicon wafers. Continuous line bonds are typically generated by overlapping single bond spots, in which the overlapping is achieved by varying the laser scanning speed as it pastel across the wafers. This results in a wide range of laser energy density (absorbed laser fluence). The specific effects of laser energy are examined and evaluated in order to define the laser operation window which provides the optimal conditions for reliable line bonding. In addition to the bond strength evaluation, the bonded interface is analyzed by Auger electron spectroscopy (AES) and x-ray photoelectron spectroscopy (XPS) to quantify the drifting or diffusion of atoms that occurs between glass and silicon wafers during the bonding process

A dynamical feedback controller which can provide robustness to PBC (passivity based control) using SMC (sliding mode control) is proposed for DC-to-DC power converters. The properties of PBC are kept through the integral sliding mode control and the feedback linearization which has dynamics

Fully embedded structures of spiral inductors in a low loss dielectric multi-layer have been designed and fabricated using a low temperature co-fired ceramics (LTCC) technology for three-dimensional RF module integrations. The line width/space and the number of spiral layers of the embedded inductors were optimized for high Q-factor, high self-resonant frequency (SRF), process easiness, and compact size. With a same dimension and number of turns, embedded multi-layer spiral inductors reveal better performance in terms of Q-factor, SRF and the effective inductance than embedded planar spiral inductors. The optimized multi-layer spiral inductor shows maximum Q-factor of 56 and SRF of 3.6 GHz for 6.6 nH effective inductance at Q/sub max/, while planar spiral inductors have maximum Q-factor of 49 and SRF of 3.0 GHz even for 5.8 nH.

This paper presents a new predistorter design technique for combating the nonlinear distortion of orthogonal frequency division multiplexing (OFDM) signals in the presence of a nonlinear high power amplifier (HPA). The performance of the predistorted OFDM system is demonstrated via bit error rate, output power back off and total degradation. It is shown that the performance of the OFDM system linearized by the proposed predistorter is significantly better than that without the predistorter, and the performance approaches that of the OFDM system linearized by an ideal predistorter.

The forces exerted on an object by the each end-effector of multimanipulators are decomposed into the motion-inducing force and the internal force. Motion-inducing force contributes to the motion of an object and internal force can not do it. The motion of an object can't track exactly the desired motion because of internal force component, therefore internal force component must be considered. In this paper, using the resolved acceleration control method and the fact that internal force lies in the null space of Jacobian matrix, we construct independently the position, motion-inducing force and internal force controller. Secondly we construct the robust controller to preserve the robustness with respect to the uncertainty of manipulator parameters.

This paper presents a parallel adaptive predistorter design technique for RF power amplifier linearization, based on the indirect learning architecture. The predistortion is accomplished by inverse modeling of the AM/AM response and modeling of the AM/PM response of a high power amplifier. In order to implement the predistortion adaptively, the coefficient vectors for the amplitude inverse and for the phase modeling are updated in parallel, from the amplitude response and phase response of the amplifier output, respectively. The performance of the proposed parallel adaptive predistortion linearizer (PAP-LZR) is illustrated by linearizing traveling wave tube (TWT) nonlinear amplitude and phase characteristics, suppression of intermodulation products, and adapting to a change in TWT parameters.

Plasma charge-induced damage has been investigated during metal interconnection in SrBi/sub 2/Ta/sub 2/O/sub 9/(SBT)-FeRAM device. The degradation of the ferroelectric characteristics, such as coercive voltage shift, was predominantly attributed to the metal etching that would inject electrons through the metal antenna and contacts. We also found that the degradation was not caused by a sputtering process in deposition of metal films or mechanical stress of patterned metal pads. To recover the plasma charge-induced damage, we suggest that a soft plasma treatment after metal plasma etching can neutralize charge-up of the electrons so that the degradation of electric properties is minimized.