Recent Patents on Computer Science - Volume 5, Issue 2, 2012

In this paper, we review some of the recent patents on spectrum sensing techniques for cognitive radio (CR) applications. The presented patents are categorized under: 1) spectrum sensing algorithms and architectures, 2) spectrum sensing and data communication and 3) cooperative spectrum sensing. The presented patents include special sensing algorithms that are based on the multi-resolution spectrum sensing (M Read More

Driven by the increasing demand for radio spectrum bands, it is now becoming extremely hard to find vacant bands to deploy new value added services. Spectrum shortage results from the spectrum management policy rather than from the physical scarcity of usable frequencies. Dynamic Spectrum Access (DSA) is proposed as an emerging solution to optimally use the radio resources. DSA allows secondary (unlicensed) Co Read More

As the proliferation of wireless handheld devices such as laptops, smart phones, tablets grows exponentially, new technologies have to be adopted to efficiently use the Radio Frequency Spectrum. Opportunistic Spectrum Access (OSA) network offers a promising solution to improve spectrum utilization and efficiency by harnessing the available spectrum resources in real-time. However, participants in the OSA network can co Read More

Opportunistic Spectrum Access (OSA) is a promising solution to increase spectral efficiency in Cognitive Radio (CR) networks. According to this paradigm, unlicensed secondary CR users can access the spectrum licensed to primary users, provided that harmful interference is avoided. However, in OSA networks secondary users need a Common Control Channel (CCC) to identify the spectrum opportunities, i.e., common Read More

A critical aspect in the analysis, design and implementation of wireless communication systems and networks is the thorough understanding of the nature and characteristics of the propagation medium. Its study has been a key research topic from the very beginning of wireless communications but it has proliferated in the last two decades due to the extreme growth of wireless technologies and the increasing demand of wireless Read More

The content and quality of teaching were already subjected to many theoretical researches. There is a constant need to improve the quality of education, which means better learning and teaching experience for both students and teachers. The purpose of this paper is to give basic information, and applicable examples, about methods used in communicative approach to teaching, while teaching programming. One Read More

Word of mouth (WOM) with good information quality has a significant influence on consumer behaviors. A WOM document containing an evident sentimental orientation is one of the most important features of information quality. Although a high coverage sentimental WordNet lexicon, i.e. SentiWordNet, has been developed, its performance when applying it to WOM quality classification for WOM is not yet known. This resea Read More

In this patent paper, a proxy blind signature scheme typed bilinear pairings is suggested. The proxy blind signature scheme is demonstrated as secure under discrete logarithm problem, decision bilinear Diffie-Hellman scheme and the chosen-target computational Diffie-Hellman in the random oracle model. In reality, users can withdraw and deposit funds from all levels of banks. In this patent we introduced a new e-pay Read More

The Patent s annotated in this section have been selected from various Patent databases. These recent Patent s are relevant to the articles published in this journal issue, categorized by different computation methods, bioinformatics, medical informatics, computer graphics, artificial intelligence, cybernetics, hardware architectures, software, theory and methods involved and related to computer science....