In RFID systems, the performance of each reader such as interrogation range and tag recognition rate may suffer from interferences from other readers. Since the reader interference can be mitigated by output signal power control, spectral and/or temporal separation among readers, the system performance depends on how to adapt the various reader arbitration metrics such as time, frequency, and o...

IEEE 802.15.4a impulse radio-time hopping ultra wide band (IR-TH UWB) physical layer, due to small duty cycle and very short pulse widths is robust against multipath propagation. However, scattering and reflections with the large number of obstacles in indoor channel environments, give rise to dense multipath fading. It imposes serious problem to optimum Rake receiver architectures, for which v...

Purpose – This study seeks to evaluate a selection of second-generation ebook readers in order to determine which devices deliver the best experience for the user, in terms of functionality and overall experience. The technical and physical elements of the devices are also compared. Design/methodology/approach – This paper starts with a brief discussion of the current ebook marketplace, and pre...

Most of existing RFID indoor localization algorithm is based on the signal strength values, reference tags and ranging location. After these algorithms are applied to the occasions of large space and complex environment such as exhibition hall, hospitals and prisons they are facing some problems such as high system cost, deploying difficulties and detecting difficulties of working state of read...

Applied Literature, however, does not have literature at its centre. Literature in this domain is a tool to solve problems and achieve goals. Using literature to teach and learn languages, the application of literature to language education, is a very handy example. Health Humanities (by Crawford, et al. and reviewed by A. Ramazani in our Journal's previous issue) comprises chapters on how lite...

This study investigates blind users’ mental models of Windows environment and their strategies in coping with new desktops and applications. The relationship between users’ mental model and their perceived usability problems when using an unfamiliar screen reader is also reported. Blind users in this study possess a functional or structural mental model or a combination of thereof. They also ha...

It has been observed many times, both in the Monthly and elsewhere, that the set of all quotients of prime numbers is dense in the positive real numbers. In this short note we answer the related question: “Is the set of all quotients of Gaussian primes dense in the complex plane?” Quotient sets {s/t : s, t ∈ S} corresponding to subsets S of the natural numbers have been intensely studied in the...

the reader as one of the three angles of literary criticism triangle besides its two other angles i.e. the writer and literary work is considered as one of the effective factors in studying a  literary work in critical circles. some critics call him consumer on the one hand and producer on the other hand because of his interpretations and perceptions. accordingly, literary works are divided int...