Long-range nature of Feshbach molecules in Bose-Einstein condensates

We discuss the long-range nature of the molecules produced in recent experiments on molecular Bose-Einstein condensation. The properties of these molecules depend on the full two-body Hamiltonian and not just on the states of the system in the absence of interchannel couplings. The very long-range nature of the state is crucial to the efficiency of production in the experiments. Our many-body treatment of the gas accounts for the full binary physics and describes properly how these molecular condensates can be directly probed

Readdressing the trade effect of the Euro: Allowing for currency misalignment

We know that euro-area member countries have absorbed asymmetric shocks in ways that are inconsistent with a common nominal anchor. Based on a reformulation of the gravity model that allows for such bilateral misalignment, we disentangle the conventional trade cost channel and trade effects deriving from 'implicit currency misalignment'. Econometric estimation reveals that the currency misalignment channel exerts a significant trade effect on bilateral exports. We retrieve country specific estimates of the euro effect on trade based on misalignment. This reveals asymmetric trade effects and heterogeneous outlooks across countries for the costs and benefits from adopting the euro. --Euro,gravity model,exchange rates,purchasing power parity,trade imbalances

How Robust are Sign and Rank Order Tests of the Heckscher-Ohlin-Vanek Theorem?

The present paper will concentrate on four different rank order and two different sign propositions of the HOV model, which have, at various times, all been the subject of empirical analysis in the literature, and it will establish conditions, under which a given data set will support one (rank order or sign) hypothesis while at the same time rejecting another. This will shed some light on the circumstances influencing the likelihood of such non-robust test results. The paper will also examine the empirical relevance of this phenomenon of non-robustness using the multi-country data set published in Bowen et al.Research Seminar in International Economics, Department of Economics, University of Michiganhttp://deepblue.lib.umich.edu/bitstream/2027.42/100819/1/ECON278.pd

Modeling Heckscher-Ohlin Comparative Advantage in Regression Equations: A Critical Survey

This paper explores the possible links that one can find between rigorous formulations of the factor proporations theory and its empirical examination in a regression framework. The paper tries to bring together in a systematic way, and to evaluate the various ways that can be pursued to narrow the above mentioned gap in the theoretical justification of regression tests of the factor proportions theory.Research Seminar in International Economics, Department of Economics, University of Michiganhttp://deepblue.lib.umich.edu/bitstream/2027.42/100822/1/ECON280.pd

Income Distribution and Labor Market Effects of Austrian pre- and post-Tokyo Round Tariff Protection

This paper argues that focusing on short-run income distribution effects of tariffs within a specific factors model provides a much better rationale for the calculation of effective rates of protexction than does the traditional focus on long-run resource reallocation. It shows how factor price and labor market effects can be calculated from effective rates of protection, if factor specificity is introduced. Along these lines, the paper also presents some empirical results for Austrian pre- and post-Tokyo-round tariff protection.Research Seminar in International Economics, Department of Economics, University of Michiganhttp://deepblue.lib.umich.edu/bitstream/2027.42/100821/1/ECON279.pd

Importance of Atomic Charge Concepts in Empirical Force Fields: The SCALCHA Approach to Obtaining Atomic Charges

A general, exactly defined and simple method to obtain the parameters for empirical force fields, as applied in molecular dynamics simulations, is of great interest today. Electrostatic interactions play a very important role in molecular structures. Therefore, there is a need for a method to determine atomic charges for all molecules of biological relevance that can be used in the current monopole approach. We introduce a general, determined and simple method to project atomic charges, for example from quantum mechanical calculations, onto the existing empirical force fields

Perioperative infection prophylaxis and risk factor impact in colon surgery

Background: A prospective observational study was undertaken in 2,481 patients undergoing elective colon resection in 114 German centers to identify optimal drug and dosing modalities and risk factors for postoperative infection. Methods: Patients were pair matched using six risk factors and divided into 672 pairs (ceftriaxone vs, other cephalosporins, group A) and 400 pairs (ceftriaxone vs. penicillins, group B). End points were local and systemic postoperative infection and cost effectiveness. Results: Local infection rates were 6.0 versus 6.5% (group A) and 4.0 versus 10.5% (group B); systemic infection rates in groups A and B were 4.9 versus 6.3% and 3.3 versus 10.5%, respectively. Ceftriaxone was more effective than penicillins overall (6.8 vs. 17.8%, p < 0.001). Length of postoperative hospital stay was 16.2 versus 16.9 days (group A) and 15.8 versus 17.6 days (group B). Of the six risk factors, age and concomitant disease were significant for systemic infection, and blood loss, rectum resection and immunosuppressive therapy were significant for local infection. Penicillin was a risk factor compared to ceftriaxone (p < 0.0001). Ceftriaxone saved Q160.7 versus other cephalosporins and O416.2 versus penicillins. Conclusion: Clinical and microbiological efficacy are responsible for the cost effectiveness of ceftriaxone for perioperative prophylaxis in colorectal surgery. Copyright (C) 2000 S. Karger AG, Basel

A comparison of the fluency of oral, written and multiple-choice recall after silent reading of five grade levels

Thesis (Ed.M.)--Boston Universit