On the nonlinear dynamics of topological solitons in DNA

Dynamics of topological solitons describing open states in the DNA double helix are studied in the frameworks of the model which takes into account asymmetry of the helix. It is shown that three types of topological solitons can occur in the DNA double chain. Interaction between the solitons, their interactions with the chain inhomogeneities and stability of the solitons with respect to thermal oscillations are investigated.Comment: 16 pages, 16 figure

Hotel management contracts and deficiencies in owner-operator capital expenditure goal congruency

A review of the findings of prior empirical research concerning hotel management contracts between owners and operators is undertaken. It is noted that management contracts have become increasingly commonplace in the international hotel sector and that gross revenue and gross operating profit are the most extensively used determinants of operator incentive fee remuneration. These findings present a platform for examining how revenue and gross operating profit are deficient in promoting owner-operator goal congruency. In light of this, return on investment (ROI) and residual income (RI) are examined as potential alternative determinants of operator reimbursement. Although it is appears that both ROI and RI as determinants of hotel operator fees would represent an advance in promoting owner-operator goal congruency, a rationale outlining how RI is preferable to ROI is outlined. © 2010 International Council on Hotel, Restaurant and Institutional Education