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To investigate the role of newly synthesized apocytochrome P450 (P450) in the regulation of 5-aminolevulinate synthase (ALAS), we overexpressed P450 in primary cultures of chick embryo hepatocytes and measured the subsequent effects on ALAS mRNA by semiquantitative RT-PCR. Hepatocytes were co-transfected with a vector for expression of P450 cDNAs (CYP3A4 or(More)
Femtocell networks, consisting of a conventional macro cellular deployment and overlaying femtocells, forming a hierarchical cell structure, constitute an attractive solution to improving the macrocell capacity and coverage. However, the inter-and intra-tier interferences in such systems can significantly reduce the capacity and cause an unacceptably high(More)
Heme is not only a very important prosthetic group that modulates the structure and activity of heme proteins but also a regulatory molecule that controls metabolic pathways and the biosynthesis of various proteins. However, investigation into heme regulatory effects in higher vertebrates has been hampered by the lack of a suitable animal model. A knockout(More)
—Modern LTE (Long Term Evolution) cellular networks provide advanced services for billions of users that go beyond traditional voice and short messaging traffic. The recent trend of Distributed Denial of Service (DDoS) attacks impacting the availability of communication systems illustrate the importance of strengthening the resiliency of mobility networks(More)
Voice traffic termination fraud, often referred to as Subscriber Identity Module box (SIMbox) fraud, is a common illegal practice on mobile networks. As a result, cellular operators around the globe lose billions annually. Moreover, SIMboxes compromise the cellular network infrastructure by overloading local base stations serving these devices. This paper(More)
The Short Messaging Service (SMS), one of the most successful cellular services, generates millions of dollars in revenue for mobile operators. Estimates indicate that billions of text messages are traveling the airwaves daily. Nevertheless, text messaging is becoming a source of customer dissatisfaction due to the rapid surge of messaging abuse activities.(More)
The emergence of the Internet of Things (IoT) introduces a vast ecosystem of new network-enabled objects. Although most current cellular IoT services run over 2G and 3G cellular networks, the Long Term Evolution (LTE) is expected to be one of the main platforms for the emergence of new Machine to Machine (M2M) communication systems. Cellular communication(More)
The Long Term Evolution (LTE) is the newly adopted technology to offer enhanced capacity and coverage for current mobility networks, which experience a constant traffic increase and skyrocketing bandwidth demands. This new cellular communication system, built upon a redesigned physical layer and based on an Orthogonal Frequency Division Multiple Access(More)