Importance Sampling for multi-constraints rare event probability

Improving Importance Sampling estimators for rare event probabilities requires sharp approx- imations of the optimal density leading to a nearly zero-variance estimator. This paper presents a new way to handle the estimation of the probability of a rare event defined as a finite intersection of subset. We provide a sharp approximation of the density of long runs of a random walk condi- tioned by multiples constraints, each of them defined by an average of a function of its summands as their number tends to infinity.Comment: Conference pape

Freight Mobility Supports Economic Development

This presentation starts with an overview of freight planning and implementation strategies then moves on to a conversation about the role of freight in driving Indiana’s economic development. To round out the session, we will discuss Whitestown as a case study on how communities can leverage freight to their advantage

Max Markov Chain

In this paper, we introduce Max Markov Chain (MMC), a novel representation for a useful subset of High-order Markov Chains (HMCs) with sparse correlations among the states. MMC is parsimony while retaining the expressiveness of HMCs. Even though parameter optimization is generally intractable as with HMC approximate models, it has an analytical solution, better sample efficiency, and the desired spatial and computational advantages over HMCs and approximate HMCs. Simultaneously, efficient approximate solutions exist for this type of chains as we show empirically, which allow MMCs to scale to large domains where HMCs and approximate HMCs would struggle to perform. We compare MMC with HMC, first-order Markov chain, and an approximate HMC model in synthetic domains with various data types to demonstrate that MMC is a valuable alternative for modeling stochastic processes and has many potential applications

RAIL: Yesterday, Today, and Tomorrow in Indiana, Indiana State Rail Plan

The Indiana State Rail Plan is focused on improving the mobility, safety, economic development, and environmental stewardship of the state’s multimodal freight system. As the Crossroads of America, Indiana is home to 50 railroads, which deliver freight and Hoosiers to their destinations daily. This session focuses on the development of Indiana’s State Rail Plan and strategies to balance rail, trucking, and inland waterways as complementary modes that together represent the future of cost-efficient freight transportation

Application of importance sampling to the computation of large deviations in non-equilibrium processes

We present an algorithm for finding the probabilities of rare events in nonequilibrium processes. The algorithm consists of evolving the system with a modified dynamics for which the required event occurs more frequently. By keeping track of the relative weight of phase-space trajectories generated by the modified and the original dynamics one can obtain the required probabilities. The algorithm is tested on two model systems of steady-state particle and heat transport where we find a huge improvement from direct simulation methods.Comment: 5 pages, 4 figures; some modification

Academic Collective Bargaining: Patterns and Trends

Educational services, particularly higher education, has slowly and methodically become one of the most heavily unionized segments, with much greater representation than traditional labor segments. Despite these changes, the increase in academic collective bargaining has not been well documented. Consequently, the purpose of the current paper is to examine recent trends in academic collective bargaining and to compare these trends with the current unionization and collective bargaining situation in other major industries in the United States. We begin with a comparative analysis of unionization in the United States by industry. The summary data we present indicate that the educational services industry is the third largest industry category in the United States and is the most highly unionized industry in the nation. Next, we tighten our focus to examine recent patterns and trends in academic collective bargaining. The data suggest that colleges and universities are a major sector in the overall employment landscape of the United States with academic collective bargaining representing one of the most important growth segments within the U.S. labor movement. In short, higher education unionization is expanding at a faster rate than overall union growth with the expansion of graduate student employee unionization as an area of special interest

Academic Collective Bargaining: Patterns and Trends

Educational services, particularly higher education, has slowly and methodically become one of the most heavily unionized segments, with much greater representation than traditional labor segments. Despite these changes, the increase in academic collective bargaining has not been well documented. Consequently, the purpose of the current paper is to examine recent trends in academic collective bargaining and to compare these trends with the current unionization and collective bargaining situation in other major industries in the United States. We begin with a comparative analysis of unionization in the United States by industry. The summary data we present indicate that the educational services industry is the third largest industry category in the United States and is the most highly unionized industry in the nation. Next, we tighten our focus to examine recent patterns and trends in academic collective bargaining. The data suggest that colleges and universities are a major sector in the overall employment landscape of the United States with academic collective bargaining representing one of the most important growth segments within the U.S. labor movement. In short, higher education unionization is expanding at a faster rate than overall union growth with the expansion of graduate student employee unionization as an area of special interest

A realistic double many-body expansion potential energy surface for from a multiproperty fit to accurate ab initio energies and vibrational levels

A single-valued double many-body expansion potential energy surface (DMBE I) recently obtained for the ground electronic state of the sulfur dioxide molecule by fitting correlated ab initio energies suitably corrected by scaling the dynamical correlation energy is now refined by fitting simultaneously available spectroscopic levels up to 6886 cm-1 above the minimum. The topographical features of the novel potential energy surface (DMBE II) are examined in detail, and the method is emphasized as a robust route to fit together state-of-the-art theoretical calculations and spectroscopic measurements using a single fully dimensional potential form.http://www.sciencedirect.com/science/article/B6VNG-44JJ0TT-5/1/c39f816ff06826dc517ad62441e91b5