A syntactic two-component encoding model for the trajectories of human actions

Human actions have been widely studied for their potential application in various areas such as sports, pervasive patient monitoring, and rehabilitation. However, challenges still persist pertaining to determining the most useful ways to describe human actions at the sensor, then limb and complete action levels of representation and deriving important relations between these levels each involving their own atomic components. In this paper, we report on a motion encoder developed for the sensor level based on the need to distinguish between the shape of the sensor's trajectory and its temporal characteristics during execution. This distinction is critical as it provides a different encoding scheme than the usual velocity and acceleration measures which confound these two attributes of any motion. At the same time, we eliminate noise from sensors by comparing temporal and spatial indexing schemes and a number of optimal filtering models for robust encoding. Results demonstrate the benefits of spatial indexing and separating the shape and dynamics of a motion, as well as its ability to decompose complex motions into several atomic ones. Finally, we discuss how this specific type of sensor encoder bears on the derivation of limb and complete action descriptions.

The derivation of a conceptual model for outsourcing IT security

IT security outsourcing is the establishment of a contractual relationship with an outside vendor to assume responsibility for one or more security functions. Outsourcing in IS has had a variable history of success and the complexity of the decision making process leads to a substantial degree of uncertainty. This is especially so in the realm of IS security since the protection of both hardware and software systems in is placed in the hands of an external provider. This is the second paper discussing the improvement of the effectiveness of the decision making process by means of a conceptual model using Soft System Methodology techniques that integrates security benefits, costs and their respective performance measures. In this paper the methodology used to develop the model and its validation are discussed.

The derivation of a conceptual model for IT security outsourcing

IT security outsourcing is the establishment of a contractual relationship between an organization with an outside vendor which assumes responsibility for the organisation’s security functions. Outsourcing in IS has had a variable history of success and the complexity of the decision making process leads to a substantial degree of uncertainty. This is especially so in the realm of IS security since the protection of both hardware and software systems is placed in the hands of an external provider. This paper is a fuller and more comprehensive paper of a previous paper outlining the effectiveness of the decision making process by means of a conceptual model using Soft System Methodology techniques that integratessecurity benefits, costs and their respective performance measures. In this paper the methodology used to develop the model is discussed in detail.

A stochastic derivation of the ratio form of contest success functions

This note provides a distribution-based justification for the ratio form of contest success functions (CSFs), in which a player’s success depends positively on her effort relative to that of her opponents. I show that the inverse exponential distribution of the random shocks yields the ratio form. Extending this approach to asymmetric contests, I also derive an asymmetric ratio form of CSFs.

Evaluating and improving morpho-syntactic classification over multiple corpora using pre-trained, "off-the-shelf", parts-of-speech tagging tools

This paper evaluates six commonly available parts-of-speech tagging tools over corpora other than those upon which they were originally trained. In particular this investigation measures the performance of the selected tools over varying styles and genres of text without retraining, under the assumption that domain specific training data is not always available. An investigation is performed to determine whether improved results can be achieved by combining the set of tagging tools into ensembles that use voting schemes to determine the best tag for each word. It is found that while accuracy drops due to non-domain specific training, and tag-mapping between corpora, accuracy remains very high, with the support vector machine-based tagger, and the decision tree-based tagger performing best over different corpora. It is also found that an ensemble containing a support vector machine-based tagger, a probabilistic tagger, a decision-tree based tagger and a rule-based tagger produces the largest increase in accuracy and the largest reduction in error across different corpora, using the Precision-Recall voting scheme.

Evaluating and improving morpho-syntactic classification over multiple corpora using pre-trained, “off-the-shelf”, parts-of-speech tagging tools

his paper evaluates six commonly available parts-of-speech tagging tools over corpora other than those upon which they were originally trained. In particular this investigation measures the performance of the selected tools over varying styles and genres of text without retraining, under the assumption that domain specific training data is not always available. An investigation is performed to determine whether improved results can be achieved by combining the set of tagging tools into ensembles that use voting schemes to determine the best tag for each word. It is found that while accuracy drops due to non-domain specific training, and tag-mapping between corpora, accuracy remains very high, with the support vector machine-based tagger, and the decision tree-based tagger performing best over different corpora. It is also found that an ensemble containing a support vector machine-based tagger, a probabilistic tagger, a decision-tree based tagger and a rule-based tagger produces the largest increase in accuracy and the largest reduction in error across different corpora, using the Precision-Recall voting scheme.

The syntactic priority thesis and ontological disputes

The article focuses on the neo-Fregean's claim that syntactic priority thesis (SP) can constitute a decision-procedure in relation to substantive ontological disputes. It examines alternative interpretations of SP and demonstrates why SP cannot settle disputes about the existence of numbers or deliver on the stronger meta-ontological claims made on behalf it. Problems associated with the attempt to establish ontological theses through logical and linguistic analysis are tackled.

Lexical and syntactic transfer in writing: a pilot study of two Chilean learners of EFL

Transfer is crucial during the learning and acquisition of a Second Language (L2) and can affect learners' production and reception at all stages of learning. The ·process of transfer can be explained as the use of structures or lexical items which are concurrent with or deviant from the target language, but which are in fact copies of structures or lexical items from the learner's First Language (L1) (Larranaga, Treffers-Daller, Tidball & Ortega, 2011). Transfer is a common occurrence and as such, it' is crucial to acknowledge its use and utility by learners during the process of second language learning and acquisition. Transfer is not always negative; structures and lexical items from a learner's L1 may transfer into their L2 with accuracy and naturalness. This may be particularly the case where a learner is acquiring a language which is cognate with their L1 and as such has a high degree of reciprocity or overlap. However, even cognate languages contain distinctive structures and words which L2 learners must identify as reciprocal or non-reciprocal in order to improve their writing by avoiding negative transfer. Transfer often occurs via translation, particularly for lexical items. Adult L2 learners rely on L1 translation particularly for lexical processing and production; learners' knowledge of L1 informs their use of L2 vocabulary to varying degrees depending on their proficiency (Jiang, 2004).

Derivation of turbulent energy of fiber suspensions

The energy equation for turbulent flow of fiber suspensions was derived in terms of second order correlation tensors. Fiber motion of turbulent energy including the correlation between pressure fluctuations and velocity fluctuations was discussed at two points of flow field, at which the correlation tensors were the functions of space coordinates, distance between two points, and time.

Derivation of dynamic material properties of steel-fibre-reinforced concrete using kernel regression

The reliable and efficient design of steel-fibre-reinforced concrete (SFRC) structures requires clear knowledge of material properties. Since the locations and orientations of aggregates and fibres in concrete are intrinsically random, testing results from different specimens vary, and it needs hundreds or even thousands of specimens and tests to derive the unbiased statistical distributions of material properties by using traditional statistical techniques. Therefore, few statistical studies on the SFRC material properties can be found in literature. In this study, high-rate impact test results on SFRC using split Hopkinson pressure bar are further analysed. The influences of different strain rates and various volume fractions of fibres on compressive strength of SFRC specimens under dynamic loadings will be quantified, by using kernel regression, a kernel-based nonparametric statistical method. Several kernel estimators and functions will be compared. This technique allows one to derive an unbiased statistical estimation from limited testing data. Therefore it is especially useful when the testing data is limited.

Feudal tenure and native title: revising an enduring fiction

This article argues that the feudal doctrine of tenure continues to endure as the foundation for Australian land law despite its obvious social and historical irrelevance. The doctrine of tenure is a derivation of feudal history. The article examines some of its historical foundations with the aim of highlighting the disparity between the fiction of this inherited form and the reality of a colonial Australian landscape. Particular attention is given to the fact that Australian feudal tenure was always a passive framework. It was disconnected with the landscape and therefore incapable of responding to the needs of colonial expansion. This resulted in a clear disparity between feudal form and the reality of a land system populated by statutory grants. The article argues that feudal tenure was never truly devised as a responsive land system but rather, adopted as a sovereignty device. In this sense, legal history was utilised with the aim of promoting imperial objectives within colonial Australia. Tenure was equated with absolute Crown ownership over all Australian territory despite the fact that this was inconsistent with the orthodox tenets of feudal tenure.
The article argues that the consequence of adopting feudal tenure and absolute Crown ownership has been the estrangement of indigenous rights, title and culture. The creation and legitimisation of a land framework with a fundamentally Eurocentric perspective completely destroyed indigenous interests during the settlement and colonial era. It created an imperial ideology where colonists silently accepted the denial of indigenous identity. The decision of the Mabo High Court to reassess this historical perspective and accept the validity of proven native title claims clearly disturbed tenurial assumptions. However, the High Courts' reification of the feudal form created a fundamental paradox: indigenous title was accepted as a proprietary right within a framework incapable of and unequipped to recognise the fundamentally different cultural perspectives of customary ownership. The article argues that native title cannot evolve within a common law framework that regards ownership as a derivation of the English Crown. It is suggested that ultimately, a pluralist property culture, where indigenous and non-indigenous title exist as equalised entities, can only be properly nurtured with the full and absolute abolition of the feudal doctrine of tenure.

The effect of focus on form in the written work of adult learners of Arabic

One of the key debates within SLA research circles concerns grammar
- whether and hov to include it in second language (L2) instruction. 'Noninterventionist' approaches to language leaching, which centre on focus on meaning (FonM) , have been found to be neither economical nor expedient in terms of use of learners' classtime (Long & Robinson, 1998). This paper is a study of the effects oj direct grammatical instruction within a communicative context (Focus on Form - FonF) on the accuracy rate of the use of noun-adjective agreement in the written work of adult learners of Arabic. Learning the systems oj noun/adjective agreement in Arabic presents problems for beginners since. unlike languages such as English. Arabic needs to be modified for gender, number. definiteness and case. Through teaching material and methods, first-year university English speaking students of Arabic were directly exposed to morpho-syntactic inflections relevant to noun-adjective agreement. In post-tests over an extended period. instructed students showed a higher accuracy rate of some forms than their uninstructed colleagues. suggesting focusing on form is beneficial to the Arabic learner and does not need to interrupt the communicative flow in the classroom (Ellis et al. 2001).

A practical condition for migration dynamic recrystallization

A readily evaluated condition for migration dynamic recrystallization is developed. It is based on the postulate that “the distance traversed by the boundary of a hypothetical growing grain in the time taken for the attainment of a recovery steady state must exceed the size of a critical nucleus”. A method for estimating the boundary mobility based on the kinetics of static recrystallization is also developed to facilitate evaluation of the condition. The derivation focuses first on developing an upper limit for the dynamically recrystallized grain size. This upper limit is only slightly higher than experimental values. The critical condition also agrees well with a limited set of experimental data. These data include the occurrence (and, in two cases, suppression) of dynamic recrystallization in Cu, Ni, Mg, α-Fe, γ-Fe and Al.