Exceptional solutions to the eight-vertex model and integrability of anisotropic extensions of massive fermionic models

We consider several anisotropic extensions of the Belavin model, and show that integrability holds also for the massive case for some specific relations between the coupling constants. This is done by relating the S-matrix factorization property to the exceptional solutions of the eight-vertex model. The relation of exceptional solutions to the XXZ and six-vertex models is also shown

CROSSING THE NEXT MERIDIAN: THE ECONOMICS OF RURAL-URBAN INTERDEPENDENCE, INSTITUTIONS AND INCOME DISTRIBUTION IN THE AMERICAN WEST

This paper explores and develops three ideas: (1) that the aridity of western North America and its attendant characteristics have fundamentally shaped the work of western agricultural economists and encouraged some distinctive western contributions to the study of economics; (2) that, in order to understand economic relationships that are critical to rural western economic development, economists need to move beyond the standard equilibrium economic models and explore some emerging models of spatial development and institutional change in which the concept of "increasing returns" plays a key role; (3) that the West provides a fine laboratory for testing these frameworks.Institutional and Behavioral Economics,

The influence of the scene on linguistic expectations: Evidence from cross-model priming in visual worlds

- Numerous studies of utterance mediated gaze in visual scenes have demonstrated that sentence processing is not only incremental but also eager: During processing, listeners form expectations about upcoming arguments and make anticipatory eye movements to relevant displayed objects. - In particular, selectional information from verbs has been shown to guide visual attention to appropriate objects; upon hearing “the boy will eat”, listeners start looking at edible objects even before they are mentioned [1, 2]. - While these studies provide valuable insights into semantic processing, it is not clear whether anticipatory eye movements indeed reflect the purely linguistic activation of likely arguments or whether these anticipatory processes are influenced by the circumscribed visual context. - We present a German cross-modal priming experiment in which we examined listeners sensitivity to selectional restrictions between verbs and their object arguments

CROSSING THE NEXT MERIDIAN: THE ECONOMICS OF RURAL-URBAN INTERDEPENDENCE, INSTITUTIONS, AND INCOME DISTRIBUTION IN THE AMERICAN WEST

This article explores and develops three ideas: (a) that the aridity of western North America and its attendant characteristics have fundamentally shaped the work of western agricultural economists and encouraged some distinctive western contributions to the study of economics; (b) that in order to understand economic relationships that are critical to rural western economic development, economists need to move beyond the standard equilibrium economic models and explore some emerging models of spatial development and institutional change in which the concept of “"increasing returns”" plays a key role; and (c) that the West provides a fine laboratory for testing these frameworks.Community/Rural/Urban Development,

Sources of Purchasing Power Disparities Between the G3-Economies

Recent theoretical and empirical research in international macroeconomics has rediscovered the problem of purchasing power parity (PPP). Empirically, PPP is a bad approximation of both the short-term and medium-term properties of the data. Economists have had difficulties in explaining the persistent misalignments of real exchange rates, but new empirical research by Clarida and Galí (1995) suggests that much of these real exchange rate movements are due to relative demand shocks. The present paper challenges this view by using an extended version of their structural vector autoregressive (SVAR) model in order to identify a larger number of real shocks (labour supply, productivity and aggregate demand) and nominal shocks (money demand and money supply). It is found that whilst some of their results go through in our extended framework, there is serious doubt with respect to the appropriateness of labelling those shocks which drive real exchange rates as aggregate demand disturbances.purchasing power parity, real exchange rates, shocks, structural vector autoregression, impulse response functions, variance decompositions

Nonenzymatic formation of energy-rich lactoyl and glyceroyl thioesters from glyceraldehyde and a thiol

The energy rich thioester, N-acetyl-S-lactoylcysteine, is formed under anaerobic conditions from glyceraldehyde and N-acetylcysteine at ambient temperature in aqueous solutions of sodium phosphate (pH 7.0). The conversion occurs at a rate of about 0.4% per day in reactions with 10 millimoles (mM) glyceraldehyde, 10 mM thiol, and 500 mM sodium phosphate (pH 7.0). Thioester formation proceeds at an estimated efficiency of 76%. The formation of lactoyl thioester most likely occurs by the phosphate catalyzed dehydration of glyceraldehyde to give pyruvaldehyde, which combines with thiol to form a hemithioacetal that rearranges to the thioester. A second energy rich thioester, N-acetyl-S-glyceroylcysteine, is also produced from glyceraldehyde when these reactions are carried out in the presence of oxygen and to a limited extent in the absence of oxygen. In the presence of oxygen the formation of glyceroyl thioester continues until the thiol disappears completely by oxidation. The significance of these reactions to the energetics of the origin of life is discussed