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  • Articles  (1,826)
  • Blackwell Publishing Ltd  (1,826)
  • 1990-1994  (1,826)
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  • Computer Science  (389)
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  • Articles  (1,826)
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  • 101
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    Oxford, UK : Blackwell Publishing Ltd
    Computational intelligence 10 (1994), S. 0 
    ISSN: 1467-8640
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Computer Science
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  • 102
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    Computational intelligence 10 (1994), S. 0 
    ISSN: 1467-8640
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Computer Science
    Notes: In many head-final languages such as German, Hindi, Japanese, and Korean, but also in some other languages such as Russian, arguments of a verb can occur in any order. Furthermore, arguments can occur outside of their clause (“long-distance scrambling”). Long-distance scrambling presents a challenge both to linguistic theory and to formal frameworks for linguistic description because it is very unconstrained: in a given sentence, there is no bound on the number of elements that can be scrambled nor on the distance over which each element can scramble. We discuss two formal frameworks related to tree-adjoining grammar. First, we show how scrambling facts from Korean can be handled by nonlocal multicomponent TAG (MC-TAG). Then, we argue that overt vWt-movement in German makes this analysis unattractive, and suggest a new version of MC-TAG, called V-TAG, which can handle both Korean and German word order variation. Interestingly, this new version has more attractive computational properties than nonlocal MC-TAG. We conclude that this formalism is an attractive basis for the development of psycholinguistic processing models and practical parsers alike.
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  • 103
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    Oxford, UK : Blackwell Publishing Ltd
    Computational intelligence 10 (1994), S. 0 
    ISSN: 1467-8640
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Computer Science
    Notes: In this paper, we introduce and define a new class of automata (pushdown automata with n stacks, abbreviated as n-SA). The ultimate aim is to give a new characterization of LCRFL, the class of languages accepted by a linear context-free rewriting system (LCFRS). In particular, we introduce 2-SA as a new automaton model for tree-adjoining grammars (TAG). In the simplest cases (0-SA and 1-SA), the languages that are accepted by the automata are the regular and context-free languages respectively. A more complex case is the case of a 2-SA which accepts TALs. The n-SA creates an infinite hierarchy of languages and it seems that this hierarchy corresponds to others in the class LCFRL. The 2-SA corresponds closely to the EPDA (embedded pushdown automaton, an automaton model equivalent to TAGs). Unlike the EPDA, which allows push operations “below the top stack,” an n-SA allows push and pop operations only on the top of their (multiple) stacks. So n-SA trade simpler operations against an also simpler but expanded storage structure.
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  • 104
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    Oxford, UK : Blackwell Publishing Ltd
    Computational intelligence 10 (1994), S. 0 
    ISSN: 1467-8640
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Computer Science
    Notes: This paper discusses variants of nondeterministic one-way S-automata and context-free S-grammars where S is a storage type. The framework that these systems provide can be used to give alternative formulations of embedded pushdown automata and linear indexed grammars. The embedded pushdown automata is obtained by means of a linear version of a class of storage types called iterated pushdowns. Linear indexed grammar is obtained by using the pushdown storage type and restricting the way in which the grammar uses its storage.
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  • 105
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    Oxford, UK : Blackwell Publishing Ltd
    Computational intelligence 10 (1994), S. 0 
    ISSN: 1467-8640
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Computer Science
    Notes: The work presented here attempts to bring out some fundamental concepts that underlie some known parsing algorithms, usually called chart or dynamic programming parsers, in the hope of guiding the design of similar algorithms for other formalisms that could be considered for describing the “surface” syntax of languages. The key idea is that chart parsing is essentially equivalent to a simple construction of the intersection of the language (represented by its grammar) with a regular set containing only the input sentence to be parsed (represented by a finite state machine). The resulting grammar for that intersection is precisely what is usually called a shared forest: it represents all parses of a syntactically ambiguous sentence. Since most techniques for processing ill-formed input can be modeled by considering a nonsingleton regular set of input sentences, we can expect to generalize these ill-formed input processing techniques to all parsers describable with our approach.
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  • 106
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    Oxford, UK : Blackwell Publishing Ltd
    Computational intelligence 10 (1994), S. 0 
    ISSN: 1467-8640
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Computer Science
    Notes: This paper describes a bidirectional head-corner parser for (unification-based versions of) lexicalized tree-adjoining grammars.
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  • 107
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    Oxford, UK : Blackwell Publishing Ltd
    Computational intelligence 10 (1994), S. 0 
    ISSN: 1467-8640
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Computer Science
    Notes: A main purpose of natural language systems (NL-systems) is the simulation of human speech behavior, which divides into generation and analysis, in all kinds of situations. Humans process natural language in an incremental style, which means that sentences are generated or analyzed in a piecemeal fashion. Observations show that there are bidirectional dependencies between these processes. During parsing, hypotheses for the continuation of an utterance may be generated. During generation, the output may be parsed in order to detect ambiguities. This paper presents a two-level incremental parsing algorithm for LD/TLP-TAGs on the basis of Earley's context-free parser. LD/TLP-TAG is a new extension for TAG that increases the descriptive power of the formalism without changing its generative power. Elementary rules are split into local dominance description (LD) and linear precedence rules (TLP) allowing for generalizations of ordering constraints. The presented algorithm is used within an anticipation feedback loop for the incremental syntactic generator TAG-GEN.
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  • 108
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    Oxford, UK : Blackwell Publishing Ltd
    Computational intelligence 10 (1994), S. 0 
    ISSN: 1467-8640
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Computer Science
    Notes: This paper extends the “parsing as deduction” approach to tree-adjoining grammars by showing how a TAG recognition problem can be reduced to a Datalog deduction problem, and presents an SLD selection rule that makes the proof search correspond to a top-down parse using the original grammar. Just as in the DCG extension of context-free grammars, this approach permits nodes to be labeled with firsl-order terms (rather than only atomic symbols). Finally the paper discusses implementation matters, and describes how the control rule can be efficiently implemented in Prolog.
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  • 109
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    Computational intelligence 10 (1994), S. 0 
    ISSN: 1467-8640
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Computer Science
    Notes: It is possible within tree-adjoining grammar to reproduce many of the syntactic analyses originally formulated by linguists in transformational terms. To the extent that these analyses are well motivated empirically, this fact makes TAG interesting for use in developing computational learning and processing models (Joshi 1990; Frank 1992; Rambow 1994), since the use of other nontransformational formalisms sometimes forces choices of linguistic description different from those ordinarily made by descriptive syntacticians. Thus, using TAG, one can take advantage in the construction of parsers and learners of the computational tractability of a mathematically restrictive formalism without having to reinvent empirical syntax in order to do so. At the same time, TAG analyses are not identical in every detail to their transformational counterparts; and it is interesting to compare them where they diverge. The differences arise because of a fundamental difference in the way that syntactic recursion is treated in the two frameworks. In TAG, recursive structures are generated by composing elementary syntactic objects, with the result that recursion is factored apart from the representation of local syntactic dependencies. By contrast, in transformational grammar, as in many other frameworks, recursive structure and local dependencies are represented together in a single, full representation of a complex sentence. Because of this difference in the treatment of recursion, it often turns out, when TAG is used to emulate a transformational analysis, that the TAG version has advantages, of both elegance and empirical coverage, over the original. This paper is a demonstration in a new empirical domain, that of nominal constructions, of the advantages of TAG-based syntax. By presenting a linguistically detailed account of these constructions and showing the advantages of using TAG to analyze them, we strengthen the case for the use of mathematically constrained and computationally tractable representational systems in competence-based as well as in computational linguistics.
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  • 110
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    Computational intelligence 10 (1994), S. 0 
    ISSN: 1467-8640
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Computer Science
    Notes: This paper presents an algorithm (a parser) for analyzing sentences according to grammatical constraints expressed in the framework of lexicalized tree-adjoining grammar. For the current grammars of English, the algorithm behaves much better and requires much less time than its worst-case complexity. The main objective of this work is to design a practical parser whose average-case complexity is much superior to its worst case. Most of the previous methods always required the worst-case complexity. The algorithm can be used in two modes. As a recognizer it outputs whether the input sentence is grammatically correct or not. As a parser it outputs a detailed analysis of the grammatically correct sentences. As sentences are read from left to right, information about possible continuations of the sentence is computed. In this sense, the algorithm is called a predictive left to right parser. This feature reduces the average time required to process a given sentence. In the worst case, the parser requires an amount of time proportional to G2n6 for a sentence of n words and for a lexicalized tree-adjoining grammar of size G. The worst-case complexity is only reached with pathological (not naturally occurring) grammars and inputs.
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  • 111
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    Computational intelligence 10 (1994), S. 0 
    ISSN: 1467-8640
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Computer Science
    Notes: Coupled-context-free grammars are a natural generalization of context-free grammars obtained by combining nonterminals to corresponding parentheses which can only be substituted simultaneously. Refering to the generative capacity of the grammars we obtain an infinite hierarchy of languages that comprises the context-free languages as the first and all the languages generated by TAGs as the second element. Here, we present a generalization of the context-free LL(k)-notion onto coupled-context-free grammars, which leads to a characterization of subclasses of coupled-context-free grammars–and in this way of TAGs as well–which can be parsed in linear time. The parsing procedure described works incrementally so that it can be used for on-line parsing of natural language. Examples show that important elements of the tree-adjoining languages can be generated by LL(k)-coupled-context-free grammars.
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  • 112
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    Computational intelligence 10 (1994), S. 0 
    ISSN: 1467-8640
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Computer Science
    Notes: This paper describes a natural language generation system developed for a spoken language translation system. Our system employs Feature-structure-based Tree Adjoining Grammar (FTAG) for generation knowledge representation. Each elementary tree of our grammar is paired with a semantic feature structure which is consistent with semantics defined in Head-driven Phrase Structure Grammar. Feature structures attached to nodes of elementary trees are unrestricted. Thus our formalism allows HPSG style phrase structure description as well as TAG style description. The advantage of our generation knowledge representation is the ability of incorporating HPSG style “core” grammar and TAG style case-based grammar.The system generates a syntactic tree by combining elementary trees so as to satisfy an input semantic structure. The generation algorithm is an application of a semantic head-driven generation. To carry out an adjoining operation. an elementary tree with an adjunction node is dynamically split at the adjunction node during generation.
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  • 113
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    Computational intelligence 10 (1994), S. 0 
    ISSN: 1467-8640
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Computer Science
    Notes: This paper presents a knowledge-based learning method and reports on case studies in different domains. The method integrates abduction and explanation-based learning. Abduction provides an improved method for constructing explanations. The improvement enlarges the set of examples that can be explained so that one can learn from additional examples using traditional explanation-based macro learning. Abduction also provides a form of knowledge level learning. Descriptions of case studies show how to set up abduction engines for tasks in particular domains. The case studies involve over a hundred examples taken from diverse domains requiring logical, physical, and psychological knowledge and reasoning. The case studies are relevant to a wide range of practical tasks including natural language understanding and plan recognition; qualitative physical reasoning and postdiction; diagnosis and signal interpretation; and decision making under uncertainty. The descriptions of the case studies include an example, its explanation, and discussions of what is learned by macro-learning and by abductive inference. The paper discusses how to provide and represent the domain knowledge and meta-knowledge needed for abduction and search control. The main conclusion is that abductive inference is important for learning. Abduction and macro-learning are complementary and synergistic.
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  • 114
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    Computational intelligence 10 (1994), S. 0 
    ISSN: 1467-8640
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Computer Science
    Notes: The frequent and conventional use of nonliteral language has been a major stumbling block for natural language processing systems since the early machine translation efforts. Metaphor, metonymy, and indirect speech acts are among the most troublesome phenomena. Recent computational efforts addressing these problems have taken an approach that emphasizes the use of systematic knowledge about nonliteral language conventions. We are currently engaged in an effort to supply this knowledge in the case of conventional metaphor. We are constructing MetaBank: an empirically derived and theoretically motivated knowledge-base of English metaphorical conventions. This article describes our three-part approach to the construction of MetaBank: the collection of on-line textual resources and databases of linguistic generalizations, the development of a methodology for analyzing these resources, and the construction of a knowledge-base based on the preceding analyses.
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  • 115
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    Computational intelligence 10 (1994), S. 0 
    ISSN: 1467-8640
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Computer Science
    Notes: This paper explores the application of a rich model of pragmatic context to the problem of identifying and correcting real-word spelling errors. Results suggest that such a model can be useful for generating and ranking a list of possible corrections according to their contextual relevance. In the domain of expert consultation discourse, a mode! of pragmatic context must represent not only the user's domain plans, but also the problem-solving processes that explore alternative plans, refining and instantiating the intended plan, and the connections between those problem-solving moves and their resulting discourse manifestations. In the model presented, metaplans are used to represent these problem-solving and discourse levels, while heuristics that take into account the user's problem-solving strategies and world knowledge serve to rank the relative likelihood of different possible next queries. An implementation of this model has been used to suggest pragmatically coherent interpretations that can be matched against a partial parse of the input in order to generate possible corrections for real-word spelling errors.
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  • 116
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    Computational intelligence 10 (1994), S. 0 
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    Topics: Computer Science
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  • 117
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    Computational intelligence 10 (1994), S. 0 
    ISSN: 1467-8640
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Computer Science
    Notes: A number of grammatical formalisms have been proposed to describe the syntax of natural languages, and the universal recognition problems for some of those classes of grammars have been studied. A universal recognition problem for a class Q of grammars is the one to decide, taking a grammar G ∈ G and a string ui as an input, whether G can generate w or not. In this paper, the computational complexities of the universal recognition problems for parallel multiple context-free grammars, multiple context-free grammars, and their subclasses are discussed.
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  • 118
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    Computational intelligence 10 (1994), S. 0 
    ISSN: 1467-8640
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Computer Science
    Notes: We show how multicomponent TAGs, although in their “local” version equivalent to “simple” TAGs, enable one to associate the derived structures with a richer set of derivations. This is especially useful for representing some nonlocal dependencies such as wh-extraction out of NP or extraposition, as soon as one interprets the derivation structures as representing the predicate-argument dependencies. However, there is a formal alternative in the formalism of synchronous TAGs that achieves a similar result, namely, that associates standard syntactic derivations with nonisomorphic semantic derivations, and relies on the latter to represent the dependency relations. We show that the latter treatment accounts for a different range of extraposition facts in French, where the relationship between the head noun and its extraposed dependent is a semantic one.Nous montrons comment les TAGs ensemblistes “locales” (MCTAGs), qui sont équivalentes aux TAGs simples, permettent ?associer aux structures syntaxiques dérivées un ensemble plus large de structures dérivationnelles. Cela est particulièrement utile pour la représentation des dépendances non locales qu'on observe dans les extractions hors du groupe nominal et les extrapositions, à partirdu moment oùľon interprète les arbres de dérivation comme représentant les relations de dépendance. II existe toutefois une autre possibilityé dans le cadre des TAGs synchrones qui associe aux dérivations syntaxiques standard des dérivations sémantiques non isomorphes et interprète les relations de dépendance en se basant sur ces dernières. Nous montrons que cette deuxième possibilityé est mieux adaptée pour des cas ?extraposition en français où la relation de dépendance entre le nom těte et ľélément extraposé est ?ordre sémantique.
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  • 119
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    Computational intelligence 10 (1994), S. 0 
    ISSN: 1467-8640
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Computer Science
    Notes: By means of a factorization of linear precedence (LP) information in tree-adjoining grammar (TAG), the possibility to capture syntactic generalizations can be enhanced, especially with respect to languages which exhibit relative free word-order. In TAG(LD/LP) LP-information is factorized in a way reminiscent of the ID/LP format of CFGs. However, in contrast to its context-free counterpart, in TAG(LD/LP) entanglement of constituents is allowed by admitting not only the permutation of sister nodes, but also of non-sister nodes in a structural description. In this paper a generalization of the predictive left-to-right parser for TAG is presented which is able to handle a restricted variant of TAG(LD/LP), which allows the permutation of sister nodes and non-sister nodes within elementary structures, the basic building blocks of TAG(LD/LP).
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  • 120
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    Computational intelligence 10 (1994), S. 0 
    ISSN: 1467-8640
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Computer Science
    Notes: Natural-language generation has gained importance since AI systems have become more sophisticated and canned text can no longer serve the elaborate communicative tasks in such a system. In this paper, suggestions are presented to apply uniformly the formalism of tree-adjoining grammar (TAG) for all tasks of natural-language generation. Up to now plan-based systems have been preferred for most of the processing during generation. Since the individual tasks of natural-language generation are very different and complex; for example, the determination of the propositional structure of a text is described using the TAG formalism–extended by constraints and feature descriptions (UCTAC). Nevertheless, this paper proposes basic ideas for the generalization of applying a grammar formalism to natural-language generation in order to build an overall integrated system for natural-language generation. Finally, advantages of such a uniform model are discussed.
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  • 121
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    Computational intelligence 10 (1994), S. 0 
    ISSN: 1467-8640
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    Topics: Computer Science
    Notes: This paper presents an evaluation of a heuristic for partial-order planning, known as temporal coherence. The temporal coherence heuristic was proposed by Drummond and Currie as a method to improve the efficiency of partial-order planning without losing the ability to find a solution (i.e., completeness). It works by using a set of domain constraints to prune away plans that do not “make sense,” or are temporally incoherent. Our analysis shows that, while intuitively appealing, temporal coherence can only be applied to a very specific implementation of a partial-order planner and still maintain completeness. Furthermore, the heuristic does not always improve planning efficiency; in some cases, its application can actually degrade the efficiency of planning dramatically. To understand when the heuristic will work well, we conducted complexity analysis and empirical tests. Our results show that temporal coherence works well when strong domain constraints exist that significantly reduce the search space, when the number of subgoals is small, when the plan size is not too large, and when it is inexpensive to check each domain constraint.
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  • 122
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    Computational intelligence 10 (1994), S. 0 
    ISSN: 1467-8640
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    Topics: Computer Science
    Notes: Default logic has been introduced for handling reasoning with incomplete knowledge. It has been widely studied, and various definitions have been proposed for it. Most of the variants have been defined by means of fixed points of some operator. We propose here another approach, which is based on a study of the way in which general rules with exceptions, used in a default reasoning process, can contradict one another. We then isolate sets of noncontradicting rules, as large as possible in order to exploit as much information as possible, and construct, for each of these sets of rules, the set of conclusions that can be deduced from it. We show that our framework encompasses most of the existing variants of default logic, allowing those variants to be compared from a knowledge representation point of view. Our approach also enables us to provide an operational definition of extensions in some interesting cases. Proof-theoretical and semantical aspects are investigated.
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  • 123
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  • 124
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    Computational intelligence 10 (1994), S. 0 
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  • 125
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    Computational intelligence 10 (1994), S. 0 
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    Topics: Computer Science
    Notes: Exploiting an incremental and parallel processing scheme is useful to improve the performance of natural language generation systems. TAG-GEN is a TAG-based syntactic generator that realizes both principles. It is shown how the demands of incremental and parallel generation influence the definition, the design, and the processing of syntactic rules on the basis of tree-adjoining grammars.
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  • 126
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    Notes: A new approach for learning Bayesian belief networks from raw data is presented. The approach is based on Rissanen's minimal description length (MDL) principle, which is particularly well suited for this task. Our approach does not require any prior assumptions about the distribution being learned. In particular, our method can learn unrestricted multiply-connected belief networks. Furthermore, unlike other approaches our method allows us to trade off accuracy and complexity in the learned model. This is important since if the learned model is very complex (highly connected) it can be conceptually and computationally intractable. In such a case it would be preferable to use a simpler model even if it is less accurate. The MDL principle offers a reasoned method for making this trade-off. We also show that our method generalizes previous approaches based on Kullback cross-entropy. Experiments have been conducted to demonstrate the feasibility of the approach.
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  • 127
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    Topics: Computer Science
    Notes: Dimensional analysis, traditionally used in physics and engineering to identify quantitative relationships, has recently been applied to qualitative reasoning of physical systems. We illustrate some problems of this approach. In the light of this, we reexamine the fundamentals of dimensional analysis in order to more precisely characterize its scope and limitations as a tool in qualitative reasoning. We also explore its relationship to state equation representations of physical systems. In particular, we describe its value in providing a set of constraints to reduce the ambiguity that bedevils qualitative reasoning schemes. We argue that dimensional analysis should not be seen as a substitute for knowledge about the physics but rather a supplement to other sources of knowledge.
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  • 128
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    Notes: We address the problem of reasoning in cases when knowledge bases containing background knowledge are understood not as sets of formulas (rules and facts) but as collections of partially ordered theories. In our system, the usual, two-part logical structures, consisting of a metalevel and an object level, are augmented by a third level–a referential level. The referential level is a partially ordered collection of theories; it encodes background knowledge. As usual, current situations are described on the object level, and the metalevel is a place for rules that can eliminate some of the models permitted by the object level and the referential level. As a logic of reasoning the system generalizes the standard model of a rational agent: deducing actions and deriving new information about the world from a logical theory–its knowledge base. It is a natural logical system in which priorities on the possible readings of predicates, not special rules of inference, are the main source of nonmonotonicity. We introduce a theory forming operator PT(x) to exploit the priorities, and we investigate its basic logical properties. Then we show how such a system can be augmented by metarules. Although this paper concentrates on basic logical properties of the new theory, this formalism has already been applied to model a number of natural language phenomena such as the notion of text coherence, Gricean maxims, vagueness, and a few others. The paper also briefly compares it with the model of background knowledge of CYC, as proposed by Lenat and Guha.
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  • 129
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  • 130
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  • 131
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    Singapore journal of tropical geography 15 (1994), S. 0 
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    Topics: Geography
    Notes: Evaporation-elevation relationships for many areas of the tropics and subtropics are reviewed in an attempt to define general relationships and are discussed with respect to atmospheric profiles of temperature and humidity. At least three characteristic profiles can be identified: (i) a general decline in evaporation with elevation for most mountainous areas, (ii) a decrease in evaporation with elevation to a minimum (near 1,200 m in Hawai'i) and then a continual increase above that level for trade wind islands and possibly the subtropical Andes, and (iii) an increase in evaporation with elevation in a shallow layer (750 m in southern California) near sea level and a continual decrease above that level for dry, coastal, subtropical west coasts.
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    Notes: The Kaonde inhabit the savanna woodland plateaus of the Northwestern Province of Zambia. Primarily subsistence farmers, they have developed an agricultural system that consists of a chitemene form of long fallow cultivation and various forms of continuous cultivation. The different cultivation systems involve the exploitation of different environmental locations, where they are characterised by different agricultural practices and crop assemblages. Spatial variations in agricultural land use reflect locally varying environmental conditions. Given the prevalence of the tsetse fly, the Kaonde do not raise livestock, but over the last two decades some Kaonde farmers have engaged in fish-farming as a dietary supplement and cash crop.The Northwestern Province is the least populated, least developed, and most rural province in Zambia, yet recent population growth, notably in the close-settled zone around Solwezi Township (the provincial capital), has led to changes in the Kaonde agriculture system. Population pressure has led to the shortening of the fallows associated with long fallow cultivation, and an increased emphasis on existing forms of continuous cultivation. In a modified fashion, changes in Kaonde agricultural practices support the main contention of the Boserup theory that increases in population lead to the intensification of agriculture.
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    Notes: International commodity trading forms one of the three main activities attracted to international financial centres. A profile of international commodity exchange in Singapore is presented based partly on a survey of international traders approved under two government incentives (the approved international trader and approved oil trader schemes). The types of trading organisation, their activity, location decisions and evaluation of Singapore as a trading centre are discussed. Three office types are identified — the staging post, the regional mandate and the risk balancer. The regional mandate is the dominant model and is one aspect of a high level of regional containment to commodity trading. This finding is contrasted with the expectations of world city theory and its emphasis on the integration of financial centre activities into global markets.
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    Notes: The Pacific Islands present a different context for the study of human geography in the Third World. Though marked by much diversity in terms of culture, environment and history, there are key features which distinguish the region. Compared to elsewhere and with the notable exception of Papua New Guinea, they are small in terms of population, land area and resource base, yet many have attained independent nationhood. Island states are frequently fragmented so that small islands with small populations may be spread over vast expanses of ocean, creating particular problems of communication and integration. Moreover, the region is isolated. Although major trade routes cut across the Pacific, in practice, local economies are not well linked and outlying islands face high transport costs and infrequent services. Such features, largely peculiar to the Pacific, together with more universal themes of economic, cultural, political and social transformation have occupied the attention of human geographers in the past 40 years. Most early work was done by researchers from Australia, New Zealand and France but in the past two decades, the growth of regional tertiary institutions has led to a major growth of more locally-based work, much by Pacific Islanders themselves. Such a change has mirrored some major paradigmatic shifts, particularly from modernization theory through neo-Marxism to present interests in development from below and sustainability. Thus, despite the relative smallness of Pacific Island states, they have attracted much attention, both contributing to wider debates and adding new issues and perspectives on the processes of transformation of the geography of the Third World.
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    Notes: This overview of human geographic studies of sub Saharan Africa begins with the contributions made by West European geographers to the colonial service, and the growing interest in post-war ‘development’ and to the anti-imperial movements in the late colonial period (1945–60). The paper provides an intellectual map of the contributions by European and African geographers to the broad array of development problems which emerged after 1960. North American geographers made significant contributions to the debate somewhat later, particularly in association with the growing involvement of U.S. development agencies in the 1970s. Particular emphasis is given to geographic studies in fields such as agrarian change, ecological degradation, industrialization, human mobility and patterns of urbanization and settlement.
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    Notes: This paper reviews the directional shifts in human geographical research on Southeast Asia from 1945 to the present. It first begins with an overview of the identity of the region as conceived in various cultural traditions, such as the Greek, Arabic and Indian traditions. This is followed by an evaluation of regional geographies of Southeast Asia in the post-war period, highlighting the pre-eminence of the geostrategic definition of the region and the failure to come to grips with its rich cultural-historical identity. The paper then goes on to show that, arising from the changes in conceptual developments and methodologies in geography, the early regional emphasis then shifted to systematic concerns, with a movement away from ‘encyclopaedic’ to ‘adjectival’ geography (economic, urban, population, political, cultural and historical) and a greater emphasis on issues concerning national development. Since the 1980s, there have also been fewer regional works on Southeast Asia and though there are now many more indigenous geographers within the region, much of their research is based on their own national or provincial areas. However, this may shift again, given that rapid economic growth has now given the region prominence. Certainly, there is renewed multi-disciplinary interest in Southeast Asia.
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    Notes: Up to June 1993, 207 articles on physical geography have been published in the Malayan Journal of Tropical Geography (MJTG) (1953–57), Journal of Tropical Geography (JTG) (1958–79) and the Singapore Journal of Tropical Geography (SJTG) (1980–93). These articles are examined initially in terms of their sub-fields (Biogeography, Climatology, Geomorphology, Hydrology, and Soils), area of focus (the tropics, Africa, America, East Asia, South Asia, Southeast Asia excluding Malaysia and Singapore, Malaysia, Singapore, and Southwest Pacific) and the area of origin of the authors. The more significant papers in the sub-fields are indicated. Various factors influencing the contributions to the Journal and some insights on the contributions of local staff (Singapore and Malaysia) are also given. The significance of the Journal as an avenue for local and foreign authors and for papers on physical geography in the tropics is briefly evaluated.
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    Notes: Book Reviewed in this article: Joe Doherty, Elspeth Graham and Mo Malek (eds.) Postmodernism and the Social Sciences. Paul Cloke (ed.) Policy and Change in Thatcher's Britain. Ludwik Mazurkiewicz Human Geography in Eastern Europe and the Former Soviet Union. J. W. R. Whitehand and P. J. Larkham (eds.) Urban Landscapes: International Perspectives. Bernard Woods. Communication, Technology and the Development of People.
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    Notes: A number of geographers have recently championed the struggle against Eurocentric theoretical categorizations in geographical research on African cities. At the same time, many whose work has concentrated on African urban geography have felt left out in the more abstract theoretical debates of their colleagues based in the West. I argue for the possibility of confronting Western bias and contributing to broader theoretical debates by creating theoretical constructs derived from the African experience. I develop my argument through an analysis of urban development in Ng'ambo, the African “Other Side” of Zanzibar city, and work toward the creation of meso-level conceptual guides for understanding Ng'ambo's development derived from the ideas of Ng'ambo residents themselves.
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    Notes: Robert Brenner is a follower of one tradition in Marxism that is as diffusionist, as Eurocentric, as any conservative position. Within one of the most egalitarian of all socio-political doctrines, this is a tradition that believes in the historical superiority of Europeans over non-Europeans. Eurocentric Marxists are not racist, nor even prejudiced, but most of them believe that Europe is the fountainhead of civilization, the permanent source of innovative social change.
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    Notes: Spatial language and constructs are deployed systematically in the writing of many contemporary feminists. Disempowerment is couched in negative spatial terms: as “displacement,” having space denied, or as a negative or non-space. Empowerment, on the other hand, is written as an appropriation of the spatial: creating new spaces, occupying existing spaces, or revalorizing negatively labeled spaces. Furthermore, the map emerges as a common trope in this writing. Rather than transparently communicating the totality of what exists, however, their maps become rhetorical guides to possible worlds. The spatial provides a textual tool with which many contemporary feminists contest existing power relations. Space is viewed as liberating, empowering, and political. Their use of the spatial contrasts with the apolitical (and, not inconsequentially, gendered) conceptualization of space in some postmodern writing. This divergent deployment of spatial textual devices in the writing of some contemporary feminists and that of some postmodernists opens up another window on the knotty nexus of feminist and postmodern thought in geography.
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    Notes: First, this paper establishes a ground from which to question not only the relationship between power and knowledge in the construction of geographical knowledge, but also the gendering of this relationship. From this starting position, second, it is argued that dualisms permit the gendering of particular binary opposites. The argument is not that certain dualistic categories - such as Reason and Emotion or Time and Space - are inherently wrong or to deny that western societies are organized through them, at least in part. Instead, dualisms are shown - at particular times and in particular places - to mark and help police supposedly fixed, natural divisions between the powerful and the disempowered (as in the masculine versus the feminine). In assuming away dualistic economies of meaning, the danger is that this helps to maintain the reproduction of the power-ridden values which dualisms help to sustain. Indeed, it is because dualist architectures are not as fixed, stable or natural as they are meant to be (i.e., precisely because they need to be policed) that it is possible to refuse them. Finally, this paper describes one alternative episte-mology which draws on the notion of a third space. The idea of third spaces uses a spatial metaphor to suggest an alternative radical geography which mobilizes place, politics and hybrid identities. One such third space is illustrated by an empirical example.
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    Notes: Book Reviewed in this article: Robert Beauregard (Ed.) Atop the Urban Hierarchy. G. Cook (Ed.) The Future of Antarctica: Exploitation versus Preservation. K. Suter Antarctica: Private Property or Public Heritage. P. Simpson-Housley Antarctica: Exploration Perception and Metaphor. Dharam Ghai and Jessica M. Vivian (Eds.) Grassroots Environmental Action: People's Participation in Sustainable Development. A. Parker, M. Russo, D. Sommer and P. Yaeger (Eds.) Nationalisms and Sexualities. and Richard WalkerThe New Social Economy, Reworking the Division of Labor. Andrew Sayer and Richard WalkerThe New Social Economy, Reworking the Division of Labor.
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    Notes: Temporary work provides a prism that separates out and thereby makes manifest some of the displacing effects of today's most diversified and expanded divisions of capitalist labor. The chaotic conceptions of statistics agencies and business commentators fail to come to terms with this displacement, while transaction cost theories of flexibility fare little better. By contrast, a Marxist attention to displacements in the chain of value can adequately theorize and explain the capitalist roots of alienation in temping. A Marxist account is also better placed to analyze the spatial and institutional displacement of the labor process through temping. Finally, when sensitized to its own economic limits, a Marxist reading of value formation can also open the door to analyzing other, non-economic, codings of workers' value.
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    Notes: Long considered a safe and tolerant city, Toronto has been shaken during the last ten years by a series of incidents involving the police and black people which has led to a serious deterioration in police-community relations. Drawing on evidence submitted to the 1989 Ontario Task Force on Race Relations and Policing, on newspaper reports and local interviews, this paper criticizes some commonsense constructions of the relationship between “race”, crime and policing. Rejecting conventional explanations of “ethnic criminality” and personal prejudice, the paper focuses on the question of institutional racism within the police force.
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    Notes: Book Reviewed in this article: Rob Shields Places on the Margin: Alternative geographies of modernity. M. Storper and A. J. Scott (Eds.) Pathways to Industrialization and Regional Development. Jean-François Bayart The State in Africa: The Politics of the Belly. Jonathan Crush and Charles Ambler (Eds.) Liquor and Labor In South Africa. Robert Bullard, (Ed.) Confronting Environmental Racism: Voices from the Grassroots. Martin W. Lewis, Green Delusions: An Environmentalist Critique of Radical Environmentalism. Andrew Gilg (Ed.) Restructuring The Countryside: Environmental Policy in Practice
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    Notes: This paper reconstructs a view of armed violence from the personal testimony of civilians who survived massive bombing of their neighborhoods. A majority of raid victims are “ordinary” civilians, primarily women, children, and the elderly. In World War II the most destructive city-wrecking campaigns were directed against the “morale” of these civilians. Their concerns and experience receive little consideration in the literature of air war, yet huge wartime and postwar surveys recorded first hand testimonies of those in heavily bombed cities in Germany, Japan and England. Women's words are given priority: they represent the majority of able-bodied persons under the bombs, and bear witness to the human ecology of violent experience: the disruptions of everyday life; the worlds of blackout and underground; the losses of home places and urban culture. They testify as well to the uneven social and spatial distribution of harm within cities, where death, damage and homelessness overwhelmingly affected working class and inner city areas. The paper also suggests that personal testimony should be recovered and incorporated into studies of neglected and disadvantaged people in “oral geography.” Some of the radical departures and methodological rethinking involved are considered in a final section.
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    Notes: Book Reviewed in this article:S. Chant (ed.) Gender and Migration in Developing CountriesC. Philo (compiler) New Words, New Worlds: Reconceptualising Social and Cultural Geography. Conference Proceedings.Beatriz Colomina (ed.) Sexuality and Space.T. J. Barnes and J. S. Duncan (Eds.) Writing Worlds: Discourse, Text and Metaphor in the Representation of Landscape.
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    Notes: In this paper I examine reactions to the Greenham Common Women's Peace Camp. I argue that the media, local and government responses to the Greenham women reveal geographical assumptions about “normality.” The peace women, by living away from home, on the edge of a military (and therefore masculine) establishment challenged accepted patriarchal understandings of “women's place” and were thus described as “out of place.” More specifically, the women were referred to in terms of hygiene, inadequate culinary ability, sexuality and hysteria. Each of these implies a gendered form of disorder in which social, cultural and geographical boundaries have been transgressed. These reactions are placed within the context of Bakhtin's formulations of the carnivalesque and grotesque realism. I suggest that the women, through their highly visible opposition to a patriarchal military establishment, represent a threat to neatly bounded official culture which finds its geographical expression in the formal territories of the courtroom and the air base. In conclusion this illustration is placed in the wider context of cultural/political protest. I argue that transgression, while serving to reveal normally assumed hegemonic landscapes, is restrained by already existing boundaries.
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    Notes: This article analyzes the relationship between violence and the racial city. It examines Durban's construction and disintegration in the context of unsuccessful apartheid reform, and traces corresponding distinct but overlapping stages of violence. Internecine violence of the latter 1980s constituted a racially displaced confrontation over political control and resources of the society transformed into internecine conflict within black residential areas, especially the urban peripheries. The violence was rooted in spatial and material differentiation reinforced by township and shantytown power structures, which clandestine state intervention accentuated. The article concludes by analyzing the new spatial and racial city forms, suggesting alternative urban reconstruction paths to redress the deeper causes of violence.
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    Antipode 26 (1994), S. 0 
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    Topics: Geography
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    Antipode 26 (1994), S. 0 
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  • 179
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    Antipode 26 (1994), S. 0 
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    Computational intelligence 10 (1994), S. 0 
    ISSN: 1467-8640
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    Topics: Computer Science
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    Computational intelligence 10 (1994), S. 0 
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    Topics: Computer Science
    Notes: The formalism of synchronous tree-adjoining grammars, a variant of standard tree-adjoining grammars (TAG), was intended to allow the use of TAGs for language transduction in addition to language specification. In previous work, the definition of the transduction relation defined by a synchronous TAG was given by appeal to an iterative rewriting process. The rewriting definition of derivation is problematic in that it greatly extends the expressivity of the formalism and makes the design of parsing algorithms difficult if not impossible. We introduce a simple, natural definition of synchronous tree-adjoining derivation, based on isomorphisms between standard tree-adjoining derivations, that avoids the expressivity and implementability problems of the original rewriting definition. The decrease in expressivity, which would otherwise make the method unusable, is offset by the incorporation of an alternative definition of standard tree-adjoining derivation, previously proposed for completely separate reasons, thereby making it practical to entertain using the natural definition of synchronous derivation. Nonetheless, some remaining problematic cases call for yel more flexibility in the definition; the isomorphism requirement may have to be relaxed. It remains for future research to rune the exact requirements on the allowable mappings.
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  • 182
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    Computational intelligence 10 (1994), S. 0 
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    Topics: Computer Science
    Notes: Partial descriptions are sets of constraints which do not necessarily determine a unique object. Two related issues arise when objects arc specified by partial descriptions. The first asks whether a given partial description is satisfied by any object. The second seeks to produce, from a satisfiable description, an appropriate representative of those objects which satisfy it (where the notion of appropriate is defined by the circumstances in which the partial descriptions are employed). We explore these issues in the context of two recent proposals utilizing partial descriptions of trees in the area of tree-adjoining grammars. One involves the use of descriptions of trees in reinterpreting TAGs as a constraint-based formalism. In the other these descriptions are the basis of a compact representation of lexicalized TAG grammars. In this context, what counts as an appropriate representative of the set of trees which satisfy a description is a tree in that set which is minimal in the sense that every other tree in the set can be derived from it by adjunction. A partial description for which there is a unique such minimal tree will be called a quasi-tree. Our work provides precise foundations for the use of descriptions of trees in these proposals. We formalize the notions of partial descriptions of trees and of quasi-trees, and using this, provide a mechanism which derives, from an arbitrary description, an equivalent set of quasi-trees. The description is satisfiable iff that set of quasi-trees is nonempty. We then provide a second mechanism which constructs the unique minimal trees satisfying these quasi-trees. Thus these mechanisms decide our issues in a strong way–they resolve any description into an equivalent set of descriptions which have unambiguous representative trees, and produce, from that set of descriptions, those representative trees. Such mechanisms are presupposed by the LTAG proposal, but are provided in a complete form for the first time here.
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  • 183
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    Singapore journal of tropical geography 15 (1994), S. 0 
    ISSN: 1467-9493
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    Topics: Geography
    Notes: This paper examines the usefulness of a systematic typology of agricultural activities. Characteristics of both traditional and modem systems are analysed and the physical and human environmental relationships of the changing agricultural dynamics examined. Altitudinal zonation of the study site offers a diverse agro-ecological physical environment appropriate for the cultivation of subtropical plants, especially fruit. Field work, interview results, air photo analysis and land use mapping combine with a systematic descriptive matrix analysis, to show that in response to the environment and changing market conditions, mixed systems have evolved, often including commercial poultry and egg production. Increasing systematic heterogeneity such as the association of commercial fruticulture with intensive animal husbandry and the association of commercial fruticulture with subsistence and semi-commercial agriculture using animal force, poses problems to the method. The potential for use at other study sites and the limitations of the technique are discussed.
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    Singapore journal of tropical geography 14 (1994), S. 0 
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    Topics: Geography
    Notes: For the past 40 years, studies of physical geography in tropical Latin America have concentrated on the spatial and temporal diversity of biophysical environments and biota. Environmental heterogeneity arises from historical and present-day interaction between climatic, geomorphologic, edaphic, and biogeographic systems. Recent research emphasizes three major themes involving these systems: Quaternary climate change; human-altered biophysical environments; and geomorphologic activity. Findings on these themes are evaluated with respect to the tropical highlands, the tropical lowlands and related extra-tropical areas. Research on physical geography in Latin America promises numerous contributions toward a better understanding of environmental conservation.
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  • 185
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    Singapore journal of tropical geography 14 (1994), S. 0 
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    Topics: Geography
    Notes: For a decade or so after World War II, human geographers working in the American tropics found socio-political conditions and resultant research topics little changed from those before the war. This was in contrast to the Old World tropics where decolonization processes and the demands of economic development and new nation building produced divergent research currents, For the first half of the period under review, the American tropics continued to be the province largely of geographers with culturalhistorical questions grounded in natural historical bases. The legacy is Humboldt's; the practitioners most notably students of Carl Sauer or German counterparts such as Carl Troll. French and British regionalist approaches, strong in the region before World War II, survived less successfully. By the 1980s, however, broad pan-tropical currents of geographic discourse and debate had become established. New practices and theories were formulated and tested as North Atlantic geographers borrowed from antipodean innovators and others working in the Asian and African tropics. Since the 1980s, there have been greater efforts at dialogue and collaboration with host country colleagues. As might be expected in this era of ‘globalization’, national research styles and agendas have become less evident.This paper offers a highly selective map of research nodes within tropical Americanist geography since the early 1950s. The selection of examples includes qualitative criteria, but more importantly, research that signify stasis or intensification as well as turning points and departures in the overall development of this literature. The contours of this history suggest some highly evolved, even idiosyncratic enterprises, but in the main, it is an unfolding that suggests broad congruencies with human geographic work elsewhere in the tropics.
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    Singapore journal of tropical geography 14 (1994), S. 0 
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    Topics: Geography
    Notes: Of the various aspects of physical geography on tropical Africa, geomorphology appears to have received the greatest attention both in depth and spread of research efforts. Several themes have been developed, among which are individual landform studies with emphasis on the description and explanation of the origin of several landforms, the most important being inselbergs. Applied geomorphology with emphasis on accelerated soil erosion is also an important theme. Up to the 1960s research was generally descriptive and speculative, but with the advances in soil erosion studies in the USA and South Africa, researchers have embarked on programmes involving the measurement of runoff, soil loss, and the determination of several indices of rainfall erosivity and soil erodibility. Coastal studies have also received considerable attention. While earlier studies were largely descriptive, recent studies involve the application of sedimentological principles. Wave parameters and beach profiles are being quantified to facilitate the quantitative study of coastal processes. Palaeogeomorphology was largely focused on the study of the morphology of old sand dunes in the current Sahel zone, on past lake levels and on the formation of stonelines. However, current efforts have moved on to the significance of palaeo deposits for purposes of mineral exploitation. Possibly the most significant new theme relates to hydrology and fluvial studies. Current research efforts in these areas include detailed morphometric analyses of small drainage basins, instrumentation and measurement of stream and sediment discharge, and detailed studies of basin topographic attributes. The paper concludes that future efforts should focus more on empirical studies so that physical geographers can make a fundamental impact on the development of the discipline in tropical Africa.
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    Papers in regional science 73 (1994), S. 0 
    ISSN: 1435-5957
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    Topics: Geography , Economics
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    Papers in regional science 73 (1994), S. 0 
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    Topics: Geography , Economics
    Notes: Household travel behaviour entails interdependent deliberate decisions, as well as the execution of routines not preceded by deliberate decisions. Furthermore, travel decisions are dependent on choices to participate in activities. Because of the complexity of the decision making process in which individuals are engaged, computational process models (CPMs) are promising means of implementing behavioral principles, which, unlike other disaggregate modeling approaches do not rely on a utility maximizing framework. A conceptual framework is proposed as the basis of a CPM interfaced with the geographical information system Arc/Info. How to model household' travel behaviour is illustrated in a case study of a single household in which one member started telecommuting.
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    Papers in regional science 73 (1994), S. 0 
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    Topics: Geography , Economics
    Notes: In this paper, an empirical model of intrametropolitan population and employment growth is developed and estimated. The empirical model is derived from equilibrium relationships that describe intrametropolitan population mid employment levels. The equilibrium relationships are related to the dynamic process of population and employment growth through the use of a lagged adjustment model. The empirical implementation of the model uses data on 365 municipalities in northern New Jersey. The use of observations that the geographically proximate necessitates that the spatial structure of the model he handled explicitly. A simultaneous system with spatial autocorrelation in the dependent variables is estimated. The results generally agree well with theory.
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    Papers in regional science 73 (1994), S. 0 
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    Topics: Geography , Economics
    Notes: This paper reports on an attempt to use a simulated annealing algorithm to solve a discrete equilibrium network design model for planning one way streets in urban areas. There has been little research on applying network design techniques to the widely used traffic management strategy of one way streets, and there has been an interest in applying global search methods to large scale and difficult problems The paper explains how to develop an algorithm by following the general framework of simulated annealing for a discrete network in which a heuristic and a simulated annealing algorithm may be a useful addition to the arsenal of techniques for researchers and practitioners who wish to tackle discrete equilibrium network design problems.
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    Papers in regional science 73 (1994), S. 0 
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    Topics: Geography , Economics
    Notes: In this paper we analyze regional developments in unemployment and vacancies in the Netherlands during the 1980s. Our purpose is to establish to what extent the differences in unemployment and vacancy rates are due to difference in regional labor market performance. The analysis is carried out by considering labor market dynamics using the concept of the matching function. We find a constant returns to scale matching function with coefficients of 0.25 for unemployment and 0.75 for vacancies. Efficiency rises substantially during the recession in the beginning of the 1980s. Regional differences in efficiency appear to be small for most regions, suggesting that a reduction in regional unemployment should by stimulating regional labor demand.
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    Papers in regional science 73 (1994), S. 0 
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    Topics: Geography , Economics
    Notes: A model based on a regional property rights framework is specified and lyze the behaviour of regional governments in China. It is able to explain the phenomena, often observed in China, of local protectionism, inefficient output and input mix and tendency towards macroeconomic instability. The analysis suggests that given existing economic institutions, tax instruments on their own are unlikely to be effective in controlling the general level of economic activity and/or influencing the structure of the economy.
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    Papers in regional science 73 (1994), S. 0 
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    Topics: Geography , Economics
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    Papers in regional science 73 (1994), S. 0 
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    Topics: Geography , Economics
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    Papers in regional science 73 (1994), S. 0 
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    Topics: Geography , Economics
    Notes: Immigrants' attachments to home and their assimilation into the host society have been identified as major factors influencing international return migration. This paper provides an empirical analysis of the determinants of attachment and assimilation, with a special focus on the impact of duration of stay. Using survey data on guestworkers in West Germany in 1984 and 1989, the study finds that assimilation increases at a decreasing rate as the duration of stay is extended. The relationship between attachment and length of stay is less strong but shows a general trend of decreasing attachment levels as guestworkers prolong their stay in Germany. The resulting trends for return migration are characterized by an overall decline in the propensity to return as the duration of nationality. Overall, the results allude to the importance of distinguishing between short term and long term immigrants.
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    Papers in regional science 73 (1994), S. 0 
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    Topics: Geography , Economics
    Notes: This study investigates the impale of climate on metropolitan elderly migration rates. Factor analyses is used to identify six factors within a set of forty climatic variables. These six factors, along with eleveit nonclimatic variables, are used to predict elderly in and outmigration rates. Metropolitan areas with muld winters and low average incomes are alterative to elderly immigrants, while those with high rents and cleat dry summers ate likely to lose older residents through outmigration. These findings are consistent with the life course model of mobility, and with the destruction between conservative and innovating migrants.
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    Papers in regional science 73 (1994), S. 0 
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    Topics: Geography , Economics
    Notes: The linkage between migration and sector characteristics is the subject of the paper. We analyze the impact of a tax rate change on a location's population and the accompanying, dynamic that occurs in the local labor market and public sector. Local labor market characteristics, tax price effects, and scale economics in consumption of a public good are found to influence the local population equilibrium.
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    Papers in regional science 73 (1994), S. 0 
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    Topics: Geography , Economics
    Notes: This paper focuses on the idea that new telecommunication technologies are “enabling technologies” for processes of industrial and spatial restructuring. How-ever, they remain only a necessary and not a sufficient condition to generate processes of decentralization of industrial activities and local development. A vast literature on the effects of now information technologies ou industrial restructuring and regional development has been reviewed, with the aim of focusing on the linkages between new telecommunication technologies and the economic characteristics of new industrial and spatial systems. The paper is divided into two parts. The first part analyzes in depth the nature of the new technologies in order to understand their real capacity and potential to reshape industrial and spatial systems. An interpretation on the technological, organizational and economic features of adoption processes is crucial Id understand the real capabilities of these technologies. The second part is focused on an empirical investigation of the effects of these new technologies on the location of industrial activities, and, conse quently, on local development, for a sample of firms located in Italy.
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    Topics: Geography , Economics
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