Perfect Simulation for Length-interacting Polygonal Markov Fields in the Plane

Abstract.  The purpose of this paper was to construct perfect samplers for length-interacting Arak–Clifford–Surgailis polygonal Markov fields in the plane with nodes of order 2 ( V -shaped nodes). This is achieved by providing for the polygonal fields a hard core marked point process representation with individual points carrying polygonal loops as their marks, so that the coupling from the past and clan of ancestors routines can be adopted.     

Class awareness and class voting in Canada: a reconsideration of the Ogmundson thesis

The argument that class voting in Canada would be noticeably higher if one of the two dominant parties were to offer the electorate a 'for-the-working-class' choice (1) does not explain the continuing minority status of the ndp, and (2) neglects to consider low working-class awareness and the absence of class-related opinions on economic issues. The present account argues that the two dominant parties fail to differentiate themselves in class terms because they are responding to the preferences of the modal Canadian voter.
La thése que I'habitude de vote déterminé par la classe au Canada serait plus forte d'une façon perceptible si I'un des deux partis dominants offrait aux électeurs un choix 'pour la classe ouvrière' ni explique pourquoi le pnd reste en minorité constante, ni considère la conscience faible de class ouvrière ou I'absence d'opinions fondées sur la classe quant aux questions d'économie. Dans cette étude on soutient que le défaut des deux parties dominants de se différencier en tant que classes constitue une adaptation rationnelle aux préférences de l'électeur canadien typique.     

Education and Change in American Opinions on a Woman for President

Abstract During the early 1970s, the increase in willingnessof Americans to vote for a woman for president was directlyrelated to education and contrasts with the inverse relationshipbetween education and increasesin willingness to vote for ablackforpresident.The contrast indicates that on some issues, the relationshipbetween education and "enlightened" opinions is variable andcharacterizes mainly the middle stages of such issues' lifehistories.     

Disagreement Loop and Path Creation/Annihilation Algorithms for Binary Planar Markov Fields with Applications to Image Segmentation

Abstract. We introduce a class of Gibbs–Markov random fields built on regular tessellations that can be understood as discrete counterparts of Arak–Surgailis polygonal fields. We focus first on consistent polygonal fields, for which we show consistency, Markovianity and solvability by means of dynamic representations. Next, we develop disagreement loop as well as path creation and annihilation dynamics for their general Gibbsian modifications, which cover most lattice‐based Gibbs–Markov random fields subject to certain mild conditions. Applications to foreground–background image segmentation problems are discussed.     

DIRTY DATA IN BRITAIN AND THE USA: THE RELIABILITY OF "INVARIANT" CHARACTERISTICS REPORTED IN SURVEYS

This section of the Quarterly is reserved for brief reportsof research in progress, discussions of unsolved problems, methodologicalstudies, and public opinion data not extensively analyzed orinterpreted. Succinct case histories are welcomed, as well ashypotheses and insights that may be useful to other studentsof public opinion. Usually, material in this section will beshorter, more informal, and more tentative than in precedingpages of the Quarterly