neurofibromatosis is a benign neurogenic tumor, originatig from schwann cells of the nerve sheath. this tumor forms a round, white mass on the course of the involved nerve. it occurs sporadically or in association with von recklinghausen's disease. laryngeal involvement is a rare occasion that affects women more than men (f/m ratio 3:2). the most common symptoms are hoarseness, dyspnea and dysp...

Is the random walk appropriate for modeling and analyzing social processes? We argue that many interesting social phenomena, including epidemics and information diffusion, cannot be modeled as a random walk, but instead must be modeled as broadcast-based or non-conservative diffusion. To produce meaningful results, social network analysis algorithms have to take into account differences between...

The MIT Faculty has made this article openly available. Please share how this access benefits you. Your story matters. Abstract. Air pollution variability is strongly dependent on meteorology. However, quantifying the impacts of changes in regional climatology on pollution extremes can be difficult due to the many non-linear and competing meteorological influences on the production, transport, ...

ABSTRACT A program is developed that includes two hydrodynamic models, a 2D depth-averaged (2DH) and a Quasi-3D (Q3D), and a pollutant transport model that uses a 1 order upwinding and a 3 order QUICKEST numerical schemes. Several tests were performed in two test basins in order to examine the performance of the above models. The Q3D model is successfully applied to Lake Ontario, using a 4-km-s...

One potential problem of active database applications is the non-termination of rules. Although algorithms have been proposed to detect non-termination, almost all provide a conservative estimate; that is, the algorithms detect all the potential cases of non-termination. These algorithms then leave it to the database programmer to analyze each case to determine if indeed the rules are non-termi...

This paper investigates the characteristics of firms that adopt persistent conservative financial policies. We are mainly interested in the determinants of the likelihood of firms adopting the persistent policies of low-leverage and high-cash holdings simultaneously. In this paper, we classify firms as financially conservative if they adopt both low-leverage and high-cash policies at the same t...

We study the evolution of a conservative dynamical system with three degrees of freedom, where small non conservative terms are added. The conservative part is a Hamiltonian system, describing the motion of a planetary system consisting of a star, with a large mass, and of two planets, with small but not negligible masses, that interact gravitationally. This is a special case of the three body ...

In this paper, we study the problem of large-scale Kernel Logistic Regression (KLR). A straightforward approach is to apply stochastic approximation to KLR. We refer to this approach as non-conservative online learning algorithm because it updates the kernel classifier after every received training example, leading to a dense classifier. To improve the sparsity of the KLR classifier, we propose...

This paper presents a uni­ ed critical-point theory in non-smooth, non-convex and dissipative Hamilton systems. The canonical dual/polar transformation methods and the associated bi-duality and triality theories proposed recently in non-convex variational problems are generalized into fully nonlinear dissipative dynamical systems governed by non-smooth constitutive laws and boundary conditions....

this prospective study, conducted in 8 cities of iran from 1999 to 2000. out of total 16,573 trauma patients, 106 (0.63%) included in this study had renal injury. this study aimed at investigation of incidence, etiology and management of renal trauma patients in iran. they were 87 (82.1%) male and 19 (17.9%) female patients. renal trauma mechanism was mainly blunt injury (93.4%). road traffic c...