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A secure e-auction scheme based on group signatures

Information systems Frontiers 2009年第3期11卷 335-343页

作者： Lee, Cheng-Chi Ho, Pi-Fang Hwang, Min-Shiang Department of Computer and Communication Engineering Asia University Lioufeng Raod Wufeng Shiang Taichung Taiwan Graduate Institute of Networking and Communication Engineering Chaoyang University of Technology 168 Gifeng E Rd. Wufeng Taichung Country 413 Taiwan Department of Management Information System National Chung Hsing University 250 Kuo Kuang Road Taichung 402 Taiwan

Recently, electronic auctions have been receiving more and more attention in the world of electronic commerce. The security and efficiency of electronic auctions are becoming important. We shall propose a securely sealed-bid auction scheme that uses our group signature scheme with the function of authenticated encryption. It can achieve the following goals: secrecy of bidding price, anonymity, verifiability, non-repudiation, and better performance. © 2008 Springer Science+Business Media, LLC.

关键词： Electronic commerce

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Current-mode approach for a variable-gain Low-Noise Amplifier (LNA)

Current-mode approach for a variable-gain Low-Noise Amplifie...

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2005 13th IEEE International Conference on Networks jointly held with the 2005 7th IEEE Malaysia International Conference on communications

作者： Lee, Lini Jamuar, S.S. Sidek, Roslina Mohd Khatun, Sabira Department of Electrical and Electronic Engineering Faculty of Engineering Universiti Putra Malaysia 43400 UPM Serdang Malaysia Department of Computer System and Communication Engineering Faculty of Engineering Universiti Putra Malaysia 43400 UPM Serdang Malaysia

ISBN: (纸本)1424400007

This paper presents a technique using current-mode approach for a CMOS variable-gain low noise amplifier, emphasizing on low power consumption and low noise factor at 1.8 GHz using standard 0.18 μm CMOS process. Rivaling classical designs in performance, this design has controllable gain range from 12.85 dB to 8.26 dB by varying current without changes in supply, Vdd as well as keeping noise factor minimum by introducing an additional capacitance. As a result, very low noise factor become possible at very low power consumption level through current-mode approach. © 2005 IEEE.

关键词： CMOS integrated circuits

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Functionalised AFM probes for the investigation of integrin distribution on the surface of osteosarcoma-derived osteoblasts

Functionalised AFM probes for the investigation of integrin ...

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2008 8th IEEE Conference on Nanotechnology, IEEE-NANO

作者： Soumetz, Federico Caneva Pastorino, Laura Raiteri, Roberto Ruggiero, Carmelina Biophysical and Electronic Engineering Department Via All'Opera Pia 11a 16145 Genova Italy Department of Communication Computer and System Sciences University of Genova Italy

ISBN: (纸本)9781424421046

Integrins are transmembrane glycoproteins made of non-covalently bonded α and β chains involved in fundamental biological processes such as cell growth, tissue development and wound repair. The expression of proper cell surface receptors plays a pivotal role to promote such phenomena. To this regard the possibility to investigate cell membrane at the single molecule level is of high potential in the field of cell biology and tissue engineering to gain insights into molecular mechanisms governing cell functions and tissue regeneration. In this work functionalised Atomic Force Microscopy (AFM) probes have been successfully developed and tested for the detection of integrins expressed on the surface of a line of osteosarcoma-derived osteoblasts named MG-63. The obtained results demonstrate the high potential of the AFM technique for the investigation of cell surface functional molecules at the nanoscale. © 2008 IEEE.

关键词： Atomic force microscopy

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Leveraging Data Analytics to Enhance Smart Home Efficiency and Security 2

Leveraging Data Analytics to Enhance Smart Home Efficiency a...

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2nd IEEE International Conference on Emerging Research in Computational Science, ICERCS 2024

作者： Vivekanandan, Karthi Kaleeswari, B. Natchiammai, P.L. Anthonisamy, Arun Vijayabharathi, R. Alagarsamy, Manjunathan Builders Engineering College Department of Electrical and Electronics Engineering Tirupur India Department of Electronics and Communication Engineering Chennai India Mookambigai College of Engineering Department of Electronics and Communication Engineering Pudukkottai India Panimalar Engineering College Department of Computer Science and Business System Chennai India Vel Tech Rangarajan Dr. Sagunthala R&D Institute of Science and Technology Department of Computer Science and Engineering Chennai India K. Ramakrishnan College of Technology Department of Electronics and Communication Engineering Trichy India

ISBN: (纸本)9798331534950

Smart home technology has made daily life easier, automated, and managed. IoT devices like smart speakers, cameras, thermostats, and security systems are increasingly integrated, raising security and privacy concerns. This study examines smart home devices' energy consumption, use trends, device failures, and system efficiency. This research uses smart home devices to identify consumption trends and risks. To better understand smart home ecosystems, the study will evaluate energy consumption, device usage hours, and malfunctions that can affect functionality and security. Using predictive analytics and machine learning, the researchers predict excessive energy usage and device problems. These methods identify trends and irregularities in smart home device operation to improve performance, efficiency, and security. This study investigates how user decisions, usage hours, and device age affect energy consumption, as well as how to identify optimization opportunities. The data analysis study contains statistical summaries and visualisations of device type, usage hours, energy consumption, user preferences, malfunction incidents, and device age. Machine learning algorithms such as linear regression and anomaly detection predict energy usage and locate anomalies. The data illustrate energy and device efficiency trends and recommend improvements to smart home security and effectiveness. This study addresses smart home device vulnerabilities and inefficiencies to improve smart home system optimization. The results offer smart home technology manufacturers and customers ways to improve energy efficiency, device performance, and system security. © 2024 IEEE.

关键词： Smart manufacturing

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Sensor and vision based autonomous AGRIBOT for sowing seeds

Sensor and vision based autonomous AGRIBOT for sowing seeds

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2017 International Conference on Energy, communication, Data Analytics and Soft Computing, ICECDS 2017

作者： Santhi, Palepu V. Kapileswar, Nellore Chenchela, Vijay K. R. Prasad, C H Venkata Siva Department of Electrical Electronic and Computer Engineering University of Pretoria South Africa Department of Electronics and Communication System Dr. M.G.R Univesity India

ISBN: (纸本)9781538618868

Autonomous agriculture robot is one of the promising solutions for precision agriculture. This paper presents the proposed sensor and vision based agricultural robot for sowing seeds. This prototype can navigate it on any agricultural land and perform seed sowing operation simultaneously. The onboard sensors along with vision system and vision based approaches achieves the navigation and localization tasks. Self-awareness of the robot's position is determined by the global and local maps generated from Global Positioning system (GPS) and on-board vision system paired with a personal computer. This paper also presents the proposed sensor based precision seed metering and sowing mechanism. The proposed robot is a micro planter whose primary task would be to sow seeds at prefixed seeding intervals in the field. The dimensions of the proposed robot are 26.5 × 18.5 × 19.65 mm as L × B × H respectively. A suspension system has been used to maintain the stability of the vehicle and prevent it from toppling in motion. © 2017 IEEE.

关键词： Global positioning system

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A study of antenna array based multipath propagation phenomenon in LAS-CDMA standard

A study of antenna array based multipath propagation phenome...

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2004 RF and Microwave Conference, RFM 2004

作者： Ng, Chee Kyun Khatun, Sabira Ali, Borhanuddin Mohd Jamuar, Sudhanshu Shekhar Ismail, Mahamod Department of Computer and Communication Systems Engineering Faculty of Engineering Universiti Putra Malaysia Malaysia Department of Electrical and Electronic Engineering Faculty of Engineering Universiti Putra Malaysia Malaysia Department of Electrical Electronic and System Engineering Faculty of Engineering Universiti Kebangsaan Malaysia Malaysia

ISBN: (纸本)078038671X

Throughout the history of wireless communications, spatially diversity's antenna array system has being important in improving the radio link between wireless users. Moreover, this system are proposed to reduce the multipath fading through its directivity narrowly radiation beam. The introduction of interference free window in delay domain from newly LAS-CDMA standard has received many attentions for furthering research on multipath delay spread. In this paper, we studied the effect of angular spread on maximum excess delay in multipath propagation environments. Then, we examined the application of antenna array in LAS-CDMA standard to overcome this multipath phenomenon. First of all, the multipath propagation literatures are reviewed, followed by the explanation of maximum angular spread in a simple discrete ring of scatterers model. Comparison analyses are made between conventional omnidirectional antenna and narrow beam antenna array. Finally, the analytical performances in term of power delay profile are presented. © 2004 IEEE.

关键词： Code division multiple access

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Photorefractive bi-directional connection module with mutual-pumped phase conjugate mirror

Photorefractive bi-directional connection module with mutual...

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Information Optics and Photonics Technology

作者： Kori, Kazumasa Okamoto, Atsushi Takayama, Yoshihisa Bunsen, Masatoshi Funakoshi, Hisatoshi Ito, Terumasa Research Group of Computer and Communication System Graduate School of Engineering Hokkaido University Wireless Communications Department National Institute of Information and Communications Technology Research Group of Computer and Communication System Graduate School of Engineering Hokkaido University Kita13-Nishi8 Kita-ku Sapporo 060-8628 Japan

The purpose of this study is to apply a free-space optical interconnection to a reconfigurable board-to-board connection where the wiring patterns connecting boards are optically formed without electrical-optical conversion. We regard a photorefractive bi-directional connection module (PBCM) based on a mutually pumped phase conjugate mirror as a key device to construct such a connection network and employ PBCMs at input/output interfaces of each board. Although optical behaviors of PBCM are influenced by the exposure conditions, we especially focus on the diameter of beams illuminating photorefractive media placed inside PBCM so as to find some geometrical restrictions hi a design of networking system. Through numerical analyses, we show a sample configuration of PBCM for the board-to-board interconnection and present a conceptual design of input/output interface.

关键词： Optical interconnects

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Smart antenna system with orthogonal codes

Smart antenna system with orthogonal codes

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Proceedings of the IEEE 6th Circuits and systems Symposium on Emerging Technologies: Frontiers of Mobile and Wireless communication

作者： Ng, Chee Kyun Mohd Ali, Borhanuddin Jamuar, Sudhanshu Shekhar Ismail, Mahamod Department of Computer and Communication Systems Engineering Faculty of Engineering Universiti Putra Malaysia Malaysia Department of Electrical and Electronic Engineering Faculty of Engineering Universiti Putra Malaysia Malaysia Department of Electrical Electronic and System Engineering Faculty of Engineering Universiti Kebangsaan Malaysia Malaysia

ISBN: (纸本)0780379381

Smart antenna, which improves the performance of wireless systems, suppress all interfering signals, and increase the system capacity. The objective of this paper is to provide an analysis of system capacity when using smart antenna with the orthogonal code. A new technique which use orthogonal codes in multiple beams to distinguish multi-user is introduced. The properties of LinkAir communications' large area synchronous (LAS) or smart codes, which are claimed to be fully orthogonal code and are used to combat major interferences, are studied. The effect of spatial multiple beams in an area where density of users is very condense in a cell is also examined. Finally, the system performance in term of system capacity is presented.

关键词： Mobile telecommunication systems

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Optimization on the preparation of microfluidic channel using dry film resist 1

Optimization on the preparation of microfluidic channel usin...

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1st IEEE International Conference on Smart Sensors and Application, ICSSA 2015

作者： Kamuri, Firdaus Abidin, Zurina Zainal Md Yunus, Nurul Amziah Hamidon, Mohd Nizar Yaacob, Mohd Hanif Kamarudin, Suryani Zhukhi, Siti Zalikha Department of Chemical and Environmental Engineering Universiti Putra Malaysia Selangor Malaysia Department of Electrical and Electronic Engineering Universiti Putra Malaysia Selangor Malaysia Department of Computer and Communication System Engineering Universiti Putra Malaysia Selangor Malaysia

ISBN: (纸本)9781479973644

In this work, microfluidic channel was explored using dry film resist (DFR) method. Many of previous studies used SU-8 and PDMS as the medium to fabricate microfluidic channel for making a microfluidic chamber. Microscope slides were used as the substrate for the applications with bio components since it is inert and stable. The DFR serves to be the spacer to form the channel. Several processes which include cleaning, drying, prebaking, laminating, UV exposure and finally post-baking were involved in channel making. These processes need to be optimized in order to obtain a good chamber. Silicon rubber and UV glue were used to seal the chamber system to prevent any leakages. © 2015 IEEE.

关键词： Film preparation

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Impact of inter-cell interference on capacity in the joint multiple access (CDMA and SDMA) system

Impact of inter-cell interference on capacity in the joint m...

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2005 Asia-Pacific Conference on communications

作者： Ng, Chee Kyun Ismail, Mahamod Ali, Borhanuddin Mohd Khatun, Sabira Jamuar, Sudhanshu Shekhar Department of Computer and Communication Systems Engineering Faculty of Engineering Universiti Putra Malaysia Malaysia Department of Electrical and Electronic Engineering Faculty of Engineering Universiti Putra Malaysia Malaysia Department of Electrical Electronic and System Engineering Faculty of Engineering Universiti Kebangsaan Malaysia Malaysia

ISBN: (纸本)0780391322

Spatial filtering using smart antenna has emerged as a promising technique to improve the performance of cellular systems. Cell splitting and sectorisation in CDMA systems could result in an increase in system capacity. In this paper, we investigate the impact of inter-cell interference on reverse link capacity in a joint multiple access system arising from the combination of CDMA and SDMA systems. The system capacity of CDMA and SDMA systems is reviewed individually. The co-channel and antenna side-lobes interferences in SDMA systems due to the randomly located mobile users in a non-uniform traffic cell are studied. Therefore, the most realistic reverse link capacity improvement of the joint multiple access system is presented here by taking into consideration both intra-sector and inter-sector interferences. The results are based on the system parameters of CDMA and SDMA systems. © 2005 IEEE.

关键词： Code division multiple access

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