Our main observation concerns closed geodesics on surfaces M with a smooth Finsler metric, i.e. a function F : TM → [0,∞) which is a norm on each tangent space TpM , p ∈ M , which is smooth outside of the zero section in TM , and which is strictly convex in the sense that Hess(F ) is positive definite on TpM \ {0}. One calls a Finsler metric F symmetric if F (p,−v) = F (p, v) for all v ∈ TpM . ...

In this paper, a valuation method for multi-energy generation plants is presented. The operational flexibility of such plants is modeled using the Energy Hub concept a modeling approach that has been developed in the ”Vision of Future Energy Networks”project at ETH Zurich. The economic value of an Energy Hub including its flexibility is calculated by means of a Monte Carlo simulation method tha...

In functional genomics, the high-throughput methods such as microarrays 1) allow analysis of the relationships between genes considering them as elements of a network and 2) lead to biological interpretations thanks to Gene Ontology. But up to now it has not been possible to find relationships between the functions and the connectivity of the genes in coexpression networks. To achieve this aim,...

We examine two factors that might explain the extent of air traffic delays in the United States: network benefits due to hubbing and congestion externalities. Airline hubs enable passengers to cross-connect to many destinations, thus creating network benefits that increase in the number of markets served from the hub. Delays are the equilibrium outcome of a hub airline equating high marginal be...

Mehrdad Mohammadi is a master student in Department of Industrial Engineering, College of Engineering, University of Tehran, Iran. Reza Tavakkoli-Moghaddam is a professor in Department of Industrial Engineering, College of Engineering, University of Tehran, Iran. Ali Ghodratnama is a Ph.D. student in Department of Industrial Engineering, College of Engineering, University of Tehran, Iran. Hamid...

We consider the problem of recovering the graph structure of a “hub-networked” Ising model given i.i.d. samples, under high-dimensional settings, where number of nodes p could be potentially larger than the number of samples n. By a “hub-networked” graph, we mean a graph with a few “hub nodes” with very large degrees. State of the art estimators for Ising models have a sample complexity that sc...

This study analyzed the fundamental geometric and kinematic characteristics of the swing hub path of the golf shot for four diverse subjects. In addition, the role of the hub path geometry in transferring the kinetic quantities from the golfer to the club were investigated. The hub path was found to have a complex geometry with significantly changing radii, and a constantly moving center-of-cur...

BACKGROUND Current WHO best infection control practices for injections do not address the use of hub cutters due to insufficient evidence on safety and efficacy. OBJECTIVE To assess the impact of the use of hub cutters on 1) the frequency of needle-stick injuries (NSIs) and other blood exposures among workers and 2) the volume of sharps waste in a mass vaccination campaign setting. METHODS ...