This editorial provides a subject index from published articles, active researchers, and published papers in the field of carbon balance and management. Background Developing a policy relevant understanding of the global carbon cycle requires a high degree of interdisciplinarity. Therefore, research published in Carbon Balance and Management involves cutting across disciplines and consulting wi...

The problem is considered of the estimation of a polygonal region in two dimensions from data approximately marking the outline of the region. A solution is sought by formulating and solving a nonlinear least squares problem. A Levenberg–Marquardt method is developed for this problem, with an implementation which exploits the special structure so that the Levenberg–Marquardt step can be compute...

OBJECTIVE The purpose of this study was to evaluate the effectiveness of contrast-enhanced ultrasound with a second-generation contrast agent in distinguishing between occlusion and pseudo-occlusion of the cervical internal carotid artery, comparing it with that of conventional Doppler ultrasound and the gold standard, computed tomography angiography. METHOD Between June 2006 and June 2012, w...

the unitary cayley graph xn has vertex set zn = {0, 1,…, n-1} and vertices u and v areadjacent, if gcd(uv, n) = 1. in [a. ilić, the energy of unitary cayley graphs, linear algebraappl. 431 (2009) 1881–1889], the energy of unitary cayley graphs is computed. in this paperthe wiener and hyperwiener index of xn is computed.

published online Jan 4, 2006; J. Am. Coll. Cardiol. John A. Rumberger "Edge" and Noninvasive Segmental Coronary Plaque Quantification: Pushing the The Promise of Quantitative Computed Tomography Coronary Angiography This information is current as of April 10, 2008 http://content.onlinejacc.org/cgi/content/full/j.jacc.2005.12.014v1 located on the World Wide Web at: The online version of this art...

objectives: bone quality and quantity assessment is one of the most important steps in implant treatment planning. different methods such as computed tomography (ct) and recently suggested cone beam computed tomography (cbct) with lower radiation dose and less time and cost are used for bone density assessment. this in vitro study aimed to compare the tissue density values in hounsfield units (...

background and aims. cone-beam computed tomography (cbct) is an imaging system which has many advantages over computed tomography (ct). in ct scan, hounsfield unit (hu) is proportional to the degree of x-ray attenuation by the tissue. in cbct, the degree of x-ray attenuation is shown by gray scale (voxel value). the aim of the present study was to investigate the relationship between gray scale...