Morphology and syntax have both received attention in statistical machine translation research, but they are usually treated independently and the historical emphasis on translation into English has meant that many morphosyntactic issues remain under-researched. Languages with richer morphologies pose additional problems and conventional approaches tend to perform poorly when either source or target language has rich morphology. In both computational and theoretical linguistics, feature structures together with the associated operation of unification have proven a powerful tool for modelling many morphosyntactic aspects of natural language. In this thesis, we propose a framework that extends a state-of-the-art syntax-based model with a feature structure lexicon and unification-based constraints on the target-side of the synchronous grammar. Whilst our framework is language-independent, we focus on problems in the translation of English to German, a language pair that has a high degree of syntactic reordering and rich target-side morphology. We first apply our approach to modelling agreement and case government phenomena. We use the lexicon to link surface form words with grammatical feature values, such as case, gender, and number, and we use constraints to enforce feature value identity for the words in agreement and government relations. We demonstrate improvements in translation quality of up to 0.5 BLEU over a strong baseline model. We then examine verbal complex production, another aspect of translation that requires the coordination of linguistic features over multiple words, often with long-range discontinuities. We develop a feature structure representation of verbal complex types, using constraint failure as an indicator of translation error and use this to automatically identify and quantify errors that occur in our baseline system. A manual analysis and classification of errors informs an extended version of the model that incorporates information derived from a parse of the source. We identify clause spans and use model features to encourage the generation of complete verbal complex types. We are able to improve accuracy as measured using precision and recall against values extracted from the reference test sets. Our framework allows for the incorporation of rich linguistic information and we present sketches of further applications that could be explored in future work.

This thesis is about how our syntactic choice changes with linguistic experience. Studies on syntactic priming show that our decisions are influenced by sentences that we have recently heard or recently spoken. They also show that not all sentences have an equal amount of influence; that repetition of verbs increases priming (the lexical-boost effect) and that some verbs are more susceptible to priming than others. This thesis explores how and why syntactic decisions change with time and what these observations tell us about the cognitive mechanism of speaking. Specifically, we set out to develop a theoretical account of syntactic priming. Theoretical accounts require mathematical models and this thesis develops a sequence of mathematical models for understanding various aspects of syntactic priming. Cognitive processes are modelled as dynamical systems that can change their behaviour when they process information. We use these dynamical systems to investigate how each episode of language comprehension or production affects syntactic decisions. We also use these systems to investigate how long priming persists, how groups of consecutive sentences affect structural decisions, why repeating words leads to greater syntactic priming and what this tells us about how words, concepts and syntax are cognitively represented. We obtain two kinds of results by simulating these mathematical models. The first kind of results reveal how syntactic priming evolves over time. We find that structural priming itself shows a gradual decay with time but the lexical enhancement of priming decays catastrophically – a result consistent with experimental observations. We also find that consecutive episodes of language processing add up nonlinearly in memory, which challenges the design of some existing psycholinguistic experiments. The second kind of results reveal how our syntax module might be connected to other cognitive modules. We find that the lexical enhancement of syntactic priming might be a consequence of how the modules of attention and working memory influence syntactic decisions. These models suggest a mechanism of priming that is in contrast to a previous prediction-based account. This prediction-based account proposes that we actively predict what we hear and structural priming is due to error-correction whenever our predictions do not match the stimuli. In contrast, our account embodies syntactic priming in cognitive processes of attention, working memory and long-term memory. It asserts that our linguistic decisions are not based solely on abstract rules but also depend on the cognitive implementation of each module. Our investigations also contribute a novel theoretical framework for studying syntactic priming. Previous studies analyse priming using error-correction or Hebbian learning algorithms. We introduce the formalism of dynamical systems. This formalism allows us to trace the effect of information processing through time. It explains how residual activation from a previous episode might play a role in structural decisions, thereby enriching our understanding of syntactic priming. Since these dynamical systems are also used to model neural processes, this theoretical framework brings our understanding of priming one step closer to its biological implementation, bridging the gap between neural processes and abstract thoughts.

Mimetics in Japanese comprise both onomatopoeic expressions (phonomimes) and other ideophones (phenomimes; psychomimes), which do not imitate acoustic phenomena. They can appear in various syntactic positions and adopt the syntactic functions of nouns in a referential phrase, predicates, attributes in a noun phrase and adverbs, with the latter being the most common usage. Since the stem of mimetic expressions such as SUTON ("thump"), KIRARI ("flash"), KYAAA ("Aaaah!") or GAN-GAN ("pounding") cannot be altered and common suffixes such as /N/, /RI/ and /Q/ (glottal stop) cannot be inflected, the syntactic function of mimetics in Japanese is determined by their position in the sentence and the particles (postpositions) used to indicate their function within a larger constituent. In colloquial speech, these particles may also be omitted, which sometimes results in the syntactic position being the only indicator of the syntactic function. However, when contrasting the grammatical usage of mimetics in data sources from various speech registers, it becomes apparent that not all mimetics are used with all particles and in all syntactic positions. Moreover, some mimetics may be combined with certain particles in idiomatic contexts, but would be used differently in spontaneous speech. For this reason, it is not surprising that opinions vary greatly when it comes to determining the distribution of individual mimetics, and mimetics as a class. This often results in L2 learners of Japanese being confused by contradictory statements in dictionaries and textbooks, which may not necessarily reflect the actual usage of mimetics in spoken Japanese and thus constitute an obstacle to effective language learning. The focus of this thesis is a description of the variable use of selected mimetics in attributive contexts, to shed light on the factors underlying the variation, and to establish whether a language change has been taking place in recent years. Empirical data collected from dictionaries, corpora, surveys and interviews shows that sociolinguistic factors such as gender, age and media exposure may influence the grammatical preferences of native speakers and their perception of mimetics. For this reason, both linguistic and extra-linguistic factors have to be taken into account in order to establish a grammatical framework for mimetics in Japanese.

Previous work on Chinese idioms has made significant on both meaning derivation process as well as internal combination patterns. As for teaching idioms at junior high schools, recent textbooks encounter three problems: first, there is no appropriate idiom lists; second, teachers rarely mention their syntactic functions and collocational relations; third, students often use idioms in the wrong way. This study aims to investigate syntactic functions of idioms, by examing the learners¡¦ errors. Chap1 clarifies the definition and the characteristics of idioms. Chap2 prosecutes error analysis. Three types of error are identified: semantic errors, grammar errors and semantic restriction errors which are the most frequent type. With regard to the influence of the familiarity and transparency of idioms, idioms that are low familiar and opaque make learning more difficult. After understanding the learning difficulties, chap4 studies syntactic functions and internal construction of idioms. The main construction type is subject-predicate and the most popular function is predicate. We cannot predict the function of an idiom by its construction, and the argument of an idiom doesn¡¦t affect its function neither. However, the core elements of an idiom is correlate with its function. Chap5 explains learners¡¦ difficulties and designs teaching strategies, such as teaching collocation. Moreover, this paper provides two idiom lists, one for junior high school students, the other for advanced learners.

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Syntactic foams-composite materials consisting of hollow particles embedded in a host matrix-have many applications for manufactured products, including weight reduction, thermal insulation, and noise reduction. In this thesis, a certain variety of syntactic foam is investigated with regards to reducing fluid borne noise in hydraulic systems. Such a foam maintains stiffness at low hydrostatic pressures and becomes compressible as pressure increases. With this compressibility, the foam is potentially useful as a liner for a reactive noise control device, much like compressed gas style devices currently in use; but the syntactic foam additionally adds significant damping to the system. In order to predict device performance, a linear multimodal model is developed of a hydraulic suppressor, constructed as an expansion chamber lined with a syntactic foam insert. Material models are developed for various compositions of the foam liners, based on an inverse analysis matching the model to experimental results. Two model simplifications are considered, and it is found that a simplified bulk modulus model gives sufficiently accurate results to make approximate predictions of suppressor performance. Several optimizations are performed to predict the optimal material composition for hydraulic excavator work cycles. To help compare the prototype suppressor against commercially available bladder style suppressors, a model is developed for the bladder style silencer and is validated experimentally. Overall, this work both demonstrates the current and potential utility of syntactic foam as a device lining material, and contributes new models to the hydraulics noise control community.

abstract: This study examines the effect that the modality (volition, doubt, emotion, belief, knowledge, etc.) of matrix noun clauses has on the ability of intermediate (second-year) Spanish L2 students (n=56) to properly produce the subjunctive and indicative moods, the relative order in which students tend to most accurately produce the subjunctive in response to the modalities of volition, doubt, and emotion, and students' level of syntactic ability and mood development. Each participant took a test consisting of twenty questions containing various modalities intended to elicit either the subjunctive or indicative mood. Participants also filled out a questionnaire that was designed to ascertain the participants' level of formal and informal experience with Spanish. The results of this study show that a) when the subjunctive was the target response most participants favored the unmarked indicative mood significantly more than the marked subjunctive mood, b) students most accurately produced the subjunctive to the modality of volition (VL), followed by doubt (DT), and emotion (EM), which is consistent with Collentine's study, and c) students were able to process complex syntax when producing the unmarked indicative mood but not when they were prompted to produce the marked subjunctive mood. The results of this study show that pedagogical expectations regarding the acquisition of the subjunctive mood by second-year Spanish students may be unrealistic as these students were operating somewhere between the pre-syntactic and syntactic stages. / Dissertation/Thesis / M.A. Applied Linguistics 2011

Recently, researchers have begun to use syntactic priming to investigate the mental representation of the two languages of bilinguals and their accessibility during comprehension and production (e.g. Bernolet, et al, 2007). In the syntactic priming technique, a priming sentence is presented to elicit a structurally similar target response, when an alternative structure is also available. Previous studies, which focused mainly on the L2 syntactic priming effects of dative structures, found priming effects when the target L2 structure is similar to the L1 but not when they are dissimilar (e.g. Branigan, 2007). The present study investigated priming effects on the English L2 production of relative clauses by 18 Advanced adult Japanese-English bilingual speakers, using a modified version of Bock's (1986) sentence-repetition and picture-description task. It was predicted that the cross-linguistic differences between Japanese and English could potentially influence their L2 production. Experiment 1 comprised three prime-types (Full-relatives, Reduced-relatives, and simple actives) in English. Experiment 2 contained two Prime-types (Full-relatives and simple actives) in Japanese. In both experiments, the target responses were in English. Repeated-measures two-factor ANOVAs was used to test for Main and Interaction effects of Prime Type and Response Type on the mean proportion of responses in each Response Type category. The results of both Experiment 1 (L2-to-L2) and Experiment 2 (L1-to-L2) indicated a significant main effect of Response Type; in both experiments, the participants preferred Simple Actives for picture-description regardless of Prime type. As for the interaction between Prime Type and Response Type, significant results were obtained only in the case of Experiment 1, where the directionality was from L2 prime to L2 response, but not in the case of Experiment 2 (Japanese-to-English). Specifically, in Experiment 1, the participants used Reduced-Relatives more often in the Reduced-Relative clause priming conditions than in the Full-Relatives and the Simple Active condition. The findings bolster the position that the L1 mental representation and the L2 mental representation of complex structures are separate, particularly when a bilingual speaker's two languages are typologically different, as in the case of Japanese and English. The findings also indicate that the L1 mental representation is not accessed during L2 production.

This thesis studies the particle ne in Standard French as it appears in the ne...pas/personne/rien and the ne...queXP structures. Based on the assumptions of a syntactic theory as developed in the Principles and Parameters, the thesis makes the following main claims: 1. Ne is an expletive. Its function is to satisfy a structural requirement on both the expression of sentence negation and association with focus. It is semantically defective, but it constrains the interpretation of the associate term it combines with (scope-marker function). 2. Some cross linguistic variations in the expression of sentence negation subsumed under a negative concord account are due to the special status of m as an expletive together with the requirement that each object must receive an independent interpretation at the interface with the Conceptual-Intentional system. 3. In the association with focus structure ne.queXP, the meaning of ne...que which is equivalent to [[only]] is not syntactically derived by combining a negative operator and an operator with the meaning of [[other than]], but built in the lexical element que. The unified account of ne in both the sentence negation and association with focus structures makes various empirical predictions. Ne, as a semantically defective element, cannot be free standing combining instead with a denotating element like pas or que, nor can it rescue a negative phrase inside an island although the ne...pas/personne/rien complex does. Ne, as a (clausal) scope marker, precludes local scope interpretations of its negative associates and the element que. Consequently, constituent negation is expressed by pas/personne/rien alone. The que element which combines with ne is excluded from positions where focus particles typically have local scope. In conclusion, cross linguistic variations cannot be reduced to structural constraints, interpretive requirements must also be taken into consideration.

abstract: Due to increasing integration of renewable resources in the power grid, an efficient high power transmission system is needed in the near future to transfer energy from remote locations to the load centers. Gas Insulated Transmission Line (GIL) is a specialized high power transmission system, designed by Siemens, for applications requiring direct burial or vertical installation of the transmission line. GIL uses SF6 as an insulating medium. Due to unavoidable gas leakages and high global warming potential of SF6, there is a need to replace this insulating gas by some other possible alternative. Insulating foam materials are characterized by excellent dielectric properties as well as their reduced weight. These materials can find their application in GIL as high voltage insulators. Syntactic foam is a polymer based insulating foam. It consists of a large number of microspheres embedded in a polymer matrix. The work in this thesis deals with the development of the selection proce-dure for an insulating foam for its application in GIL. All the steps in the process are demonstrated considering syntactic foam as an insulator. As the first step of the procedure, a small representative model of the insulating foam is built in COMSOL Multiphysics software with the help of AutoCAD and Excel VBA to analyze electric field distribution for the application of GIL. The effect of the presence of metal particles on the electric field distribution is also observed. The AC voltage withstand test is performed on the insulating foam samples according to the IEEE standards. The effect of the insulating foam on electrical parameters as well as transmission characteristics of the line is analyzed as the last part of the thesis. The results from all the simulations and AC voltage withstand test are ob-served to predict the suitability of the syntactic foam as an insulator in GIL. / Dissertation/Thesis / Masters Thesis Electrical Engineering 2014