Earticle

We propose a chapter mark addition method for surgery video application that adopts cubic higher-order local auto-correlation (CHLAC) features. In our method, normal motions, which frequently occur in a scene, are statistically learnt by using CHLAC in combination with the subspace method. An anomalous motion exists far from the subspace of the frequently-observed motions and such motion is detected based on the deviation from the subspace, and a chapter mark is placed just before the position of the detected anomalous motion. We conducted preliminary experiments using surgery video data to confirm effectiveness of the proposed method. The results show that the proposed method can detect the motions not frequently-observed in a surgery operation and the chapters are effectively constructed.

Foveation principles suggested by natural vision systems enable the construction of a proper mask that may modulate the coefficients given by the Discrete Wavelet Transform of an ECG record. The mask is spatially selective and provides maximum accuracy around specific regions of interest. Subsequent denoising and coefficient quantization are further combined with efficient coding techniques such as SPIHT in order to provide high compression ratios at low reconstruction errors. Experimental results reported on a number of MIT-BIH records show improved performances over existing solutions

Middleware facilitates the development of distributed systems by accommodating heterogeneity, hiding distribution details and providing a set of common and domain specific services. It plays a central and essential role for developing distributed systems. However, middleware is considered a mean rather than core elements of development process in the existing distributed systems software process. This paper explains the concept of middleware by categorizes middleware and analysis the problems of current middleware architectures. It also extracts three essential non-functional requirements of middleware and proposes a middleware-based distributed systems software process. The proposed software process consists in five phases: requirements analysis, design, validation, development and testing. The characteristics of middleware are considered in the entire software process. Component- Based Software Engineering, Separation of Concerns, Model-Driven Architecture, formal methods and Aspect Oriented Programming are five active research areas that have been around for several years now. In this paper, we present how these five paradigms can be put together in the context of a new software development method and we show how they can complement each other at different stages in the development life-cycle of middlewaremediated applications.

Broad spectrum of optical wireless communication is available, which can fulfill the requirements of high speed wireless communication. This is the basic advantage of optical wireless communication over conventional wireless communication technologies. The other important thing is the day by day decreasing size of wireless sensors with the advent of advancement in device processing technologies like micro- and nano-electromechanical systems. This decrease in dimensions of sensors causes serious problem for battery storage capacity. We address this issue and propose a model of communication and recharging of Wireless Sensor Network (WSN) nodes simultaneously using passive optical communication. We propose both Line-of-Sight and Quasi-diffuse communication for this purpose. There are some situations where direct LOS is better option while at non-line-of-sight, the energy of a multi-spot Quasi-diffuse beam can be utilized. In our model we have used modified Corner Cube Retroreflector (CCR) and a newly proposed device Thinfilm Corner Cube Retroreflector (TCCR) for passive communication and recharging sensor nodes. These devices have large angle of diversity due to which they can provide communication facility to large areas. Our analysis shows that the proposed model could show better performance and significant increase in network life time.

The field of WLAN has grown significantly in the last three decades. An interesting usage of computer networks is in offices and educational institutes were increased to exchange streams of multimedia data. These privately-owned networks are known as Local Area Networks (LANs) which come under the category of small scale networks but researchers introduced the possible usage of wireless technologies for interconnection. This has resulted in the emergence of wireless LANs (WLANs). In the world of information system, performance is a very important subject. It consists of the work which the computer WLAN system is supposed to do, and how do we judge whether is being done well. To achieve performance in the field of WLAN, certain features must be available and operational in the design of the WLANs. Performance must also be considered when configuring and implementing the WLAN systems. The modeler of such WLAN systems must follow a systematic approach in evaluation, measurements, and analytical or simulation modeling of such WLAN system. This paper presents a comparison and an evaluation of transmitting multimedia streams over three different WLANs scenarios by using OPNET simulator

The purpose of this research is for the establishment of Ubiquitous learning (U-learning) based synchronous, asynchronous and hybrid mode. This paper proposed the implementation of learning between student and teacher of service provider in u-space, which is not limited to traditional e-learning system. Student-focused testing services include: excellent test paper creation/deletion/registration; 7 phase framework; database development; and PDA page design. This system allows students to be supported with an electronic input, authentication, distribution, monitor, gathering, grading and inquiring phase and supports learning session dependent multicasting. The devices used include PDAs, mobile phones, portable computers and tablet PDAs. This system is to become a more capable student learning environment so that student can get student’s learning done more efficiently. The development of a ubiquitous learning environment combines the advantages of an adaptive learning environment with the benefits of ubiquitous computing and the flexibility of mobile devices.