One of the factors limiting the performance of continuous-time sigma-delta modulators (CTSDM) is clock jitter. This jitter can be classified as synchronous and accumulated/longterm jitter. A clock that is derived from a phase-lock loop (PLL) contains both types of jitter. In this paper, we present a framework that can be used to obtain the output spectrum in the presence of jitter, either synch...

The Niger Delta region of Nigeria witnessed a remarkable upsurge in environmental resource crisis as a result of the presence of oil multinationals in the region. The mass media flash before the public a vivid and multi varied images of violent behaviour that characterized social interactions in the region. The youths in the Niger Delta whose occupational aspirations are blocked due to persiste...

Online education has provided good opportunities for educationally disadvantaged people. However, some traditional learning management systems (LMSs), the base systems of online education, had the limitations in offering standardized education for diversified learners with different skills, objectives, abilities, preferences, and backgrounds. In addition, the traditional LMSs, which required a ...

The mash-up remix rose to prominence in the early 2000s, spawning fans, amateur participants, and a small social movement. This paper culturally analyzes the influences on and implications of the mash-up phenomenon. By conducting a close reading of press articles and several interviews and textually analyzing some of the most popular and critically acclaimed tracks, I argue that the mash-up is ...

In this paper we propose a framework for stability analysis of EA modulators, and argue that limit cycles for constant inputs are natural objects to investigate in this context. We present a number of analytical and approximate techniques to aid the stability analysis of the double loop and interpolative modulators, and use these techniques to propose ways of improved design that explicitly tak...

In this paper we demonstrate the GrappleUser Modeling Framework (GUMF), which ex-ploits Semantic Web technologies and Web 2.0paradigms to model users across different appli-cations and domains. It introduces novel featuressuch as dataspaces, which logically bundle userdata, and user pipes, which allow to mash up userdata from different sources.

A total of 487samples (77 and 410 of poultry feed ingredients and poultry feed, respectively) received from various parts of the country were analysed for detection of Aflatoxin B1 (AFB1). Overall incidence of AFB1 in feed ingredients was 60 percent. The average contamination and maximum levels of AFB1 were 37.62 and 56 g/kg, respectively, whereas, the incidence in poultry feed samples was 44....

The WWW is currently experiencing a revolutionary growth due to numerous emerging tools, techniques and concepts. Digital journals thus need to transform themselves to cope with this evolution of the web. With their growing information size and access, conventional techniques for managing a journal and supporting authors and readers are becoming insufficient. Journals of the future need to prov...

An ideal radio communication receiver places the analog to digital conversion just after the antenna. It is an objective in a Òsoftware radioÓ perspective. The available silicon technologies do not provide the performance required by this application. We are able to evaluate the present limits and the gap between these limits and the ideal solution proposed. In this paper, we describe the prese...

Sigma-Delta modulation techniques have been applied to narrow-band passband signals [Jantzi93]. Recent technology improvement has allowed conversion of GSM channels [Ong97] and DECT channels[Bazarjiani97]. In this report, the main concept behind BandPass Sigma-Delta conversion is briefly explained together with its advantages and applications. The architecture choices for this design are then d...