Migration = Cloning ; Aliasing (Preliminary Version)

Preliminary Version The Struggle over Migration Policy

In this paper we analyze the endogenous determination of migration quota viewing it as an outcome of a two-stage political struggle between two interest groups: those in favor and those against the proposed migration quota. We first compare the proposed policies of the two interest groups under random behavior of the government, with and without lobbying. The paper proceeds with the examination...

Aliasing Models for Object Migration

In Obliq, a lexically scoped, distributed, object-oriented programming language, object migration was suggested as the creation a copy of an object's state at the target site, followed by turning the object itself into an alias, also called surrogate, for the remote copy. We consider the creation of object surrogates as an abstraction of the above-mentioned style of migration. We introduce jebl...

Preliminary Version

The main theorem of this paper is that, for every real number < 1 (e.g., = 0:99), only a measure 0 subset of the languages decidable in exponential time are Pn tt-reducible to languages that are not exponentially dense. Thus every Pn tt-hard language for E is exponentially dense. This strengthens Watanabe's 1987 result, that every PO(logn) tt-hard language for E is exponentially dense. The comb...

Preliminary Version

PRELIMINARY VERSION – PRELIMINARY VERSION -PRELIMINA Modeling Tutoring Knowledge

This chapter introduces Part II on modeling tutoring knowledge in ITS research. Starting with its origin and with a characterization of tutoring, it proposes a general definition of tutoring, and a description of tutoring functions, variables, and interactions. The Interaction Hypothesis is presented and discussed, followed by the development of the tutorial component of ITSs, and their evaluat...