Reductive 13C-methylation of proteins has been used as an isotope labeling strategy to study protein structure, function, and dynamics by nuclear magnetic resonance (NMR) spectroscopy. However, assigning the resulting 13C-dimethylamine peaks in a 1H-13C NMR spectrum has proved to be difficult, but it is important to expand the scope of the method. The assignment strategy presented here utilizes...

This paper focuses on a narrow band technical solution that uses decentralized spectrum sharing to facilitate open access among competing Personal Communications Services (PCS) operators. Existing policies that apportion spectrum by Fixed Channel Assignment (FCA) involve inefficiencies resulting from fragmentation of the available resource into mutually exclusive frequency blocks. Dynamic Chann...

Synopsis A calculation has been done of the circular dichroism (CD) spectrum of an unordered polypeptide chain. This has been based on a Boltzmann averaging over a dipeptide conformational CD map. This is shown to be valid by comparing the CD spectra of 28-mer oligopeptides with those generated by summing dipeptide CD spectra. The calculated CD spectrum of an unordered polypeptide chain is foun...

What is spectrum sharing ? The traditional way of handling spectrum for cellular wireless wide area networks is illustrated in Figure 1-a, where two operators own certain parts of the spectrum which is again subdivided into three smaller frequency bands each assigned to one Radio Access Technology (RAT). A trend of more flexible use of spectrum is supported by novel developments in radio techno...

In this paper, we consider the coordinated spectrum access problem in a multiuser single-transceiver cognitive radio network (CRN). Our objective is to maximize the sum-rate achieved by all contending CR users with respect to both spectrum assignment and transmission rate. The problem is posed as a utility maximization problem subject to hardware and interference constraints. Specifically, we s...

If the narrow exotic baryon resonances Θ+(1540) and Ξ 3 2 (1862) are members of the JP = 12 + antidecuplet with N∗(1710), the octet-antidecuplet mixing is required not only by the mass spectrum but also by the decay pattern of N∗(1710). This casts doubt on validity of the Θ+ mass prediction by the chiral soliton model. While all pieces of the existing experimental information point to a small o...

In a telecommunication network, Routing and Wavelength Assignment (RWA) is the problem of finding lightpaths for incoming connection requests. When facing dynamic traffic, greedy assignment to requests based on predefined deterministic policies leads fragmented network that cannot make use its full capacity due stranded bandwidth. At this point service providers try recover via defragmentation ...

VUV photoionization dynamics of the S2 molecule were re-investigated from threshold up to 15.0 eV, using synchrotron radiation coupled with double imaging photoelectron/photoion coincidence featuring high resolution capabilities. We measured first photoelectron spectrum achieving higher than previous literature derive accurate spectroscopic constants for a few electronic states cation including...

For efficient spectrum utilization in cognitive radio networks it requires appropriate allocation of idle frequency spectrum among coexisting cognitive radios while maximizing total bandwidth utilization and minimizing interference. The fixed spectrum allocation scheme leads to low spectrum utilization across the whole spectrum. This paper is an attempt to overcome the problem in such wireless ...

The paper deals with a novel method of control system design which applies meromorphic transfer functions as models for retarded linear time delay systems. After introducing an auxiliary state model a finite-spectrum observer is designed to close a stabilizing state feedback. The observer finite spectrum is the key to implement a state feedback stabilization scheme and to apply the affine param...