No description available.

Our focus, in this thesis, is on zeros of hypergeometric polynomials. Several problems in various areas of science can be seen in terms of the search of zeros of functions; and this search can be reduced to finding the zeros of approximating polynomials, since under some conditions, functions can be approximated by polynomials. In this thesis, we consider the zeros of a specific polynomial, namely the hypergeometric polynomial. We review some work done on the zero location and the asymptotic zero distribution of Gauss hypergeometric polynomials with real parameters. We extend some contiguous relations of 2F1 functions, and then we deduce the zero location for some classes of Gauss polynomials with non-real parameters. We study the asymptotic zero distribution of some classes of 3F2polynomials that extend results in the literature. / Dissertation (MSc (Applied Mathematics))--University of Pretoria, 2007. / Mathematics and Applied Mathematics / MSc / unrestricted

Magistrinio darbo tikslas – įvertinti konstrukciją veikiančias apkrovas, apskaičiuoti konstrukcijos pamatų matmenis, apskaičiuoti pastato atskirų pamatų nuosėdžius, palyginti nuosėdžių reikšmes tarpusavyje, rasti santykinių nuosėdžių reikšmes ir įvertinti gretimų pamatų ir geologinių sąlygų nevienodumo įtaką šalia esantiems pamatams; įvertinti skirtingų smėlio frakcijų suspaudžiamumo savybes ir išskirti staigiųjų nuosėdžių dalį, atsirandančių smėliniuose gruntuose apkrovimo metu; pateikti išvadas bei pasiūlymus. Šiame darbe naudojami metodai, sprendiniai ir programos: sumavimo metodas, Businesko sprendinys, programos „STAAD.Pro“; „SCAD“, „MathCad“, „AutoCad“, „Exel“. Magistrinio darbo praktinė reikšmė – praplėsti supratimą apie konstrukcijas veikiančius faktorius, kurie gali labai skirtingai nulemti pagrindo ir pastato tarpusavio sąveiką. Pamatų nuosėdžių skaičiavimai parodė, kad atskirų pamatų nuosėdžiai bei santykiniai nuosėdžiai neviršija leistinų ribų, o gretimų pamatų įtaka gali būti nevertinama, kai atstumas tarp pamatų yra didesnis kaip 7,00 m. Smėlinių gruntų spūdumo savybių, dalelių formos įtakos, smėlinių gruntų elgsenos tyrimai parodė, kad smėliniuose gruntuose staigiosios deformacijos pasireiškia per pirmas 5 s, todėl galima teigti, kad statant statinius ant smėlinio grunto prognozuojami nuosėdžiai įvyksta statybos laikotarpiu. / This masters work purpose is to estimate loadings in construction; calculate foundations dimensions; calculate separate foundations displacements; compare separate foundations displacements between themselves; find relative displacements values and estimate contiguous foundations via geological difference; estimate sand different partical size compression and find primary compression limits when soil is under load; present a report of calculations and laboratory investigations. In this final work was used Businesque problem, summing method and programs: “STAAD.Pro”, “MathCad”, “SCAD”, “AutoCad”, “Exel”. From practical view this work importance is to increase understanding of construction loadings and and factors influence on soil – structure interaction. Calculations of foundations displacements showed that separate foundations and contiguous foundations displacements did not reached their critical magnitudes. Contiguous foundations evaluation to each over could not be accounted then betweeen each over foundation is more than 7,00 m. Sand compression characteristics and sand fraction shape investigation showed that primary compression appears only in first 5 seconds. Because of primary compression all prognosis about total foundation displacement in sand soil estimates when construction is in building period.

No description available.

No description available.

A large proportion of movement in urban area is constrained to a road network such as pedestrian, bicycle and vehicle. That movement information is commonly collected by Global Positioning System (GPS) sensor, which has generated large collections of trajectories. A contiguous sequential pattern (CSP) in these trajectories represents a certain number of objects traversing a sequence of spatially contiguous edges in the network, which is an intuitive way to study regularities in network-constrained movement. CSPs are closely related to route choices and traffic flows and can be useful in travel demand modeling and transportation planning. However, the efficient and scalable extraction of CSPs and effective visualization of the heavily overlapping CSPs are remaining challenges. To address these challenges, the thesis develops two algorithms and a visual analytics system. Firstly, a fast map matching (FMM) algorithm is designed for matching a noisy trajectory to a sequence of edges traversed by the object with a high performance. Secondly, an algorithm called bidirectional pruning based closed contiguous sequential pattern mining (BP-CCSM) is developed to extract sequential patterns with closeness and contiguity constraint from the map matched trajectories. Finally, a visual analytics system called sequential pattern explorer for trajectories (SPET) is designed for interactive mining and visualization of CSPs in a large collection of trajectories. Extensive experiments are performed on a real-world taxi trip GPS dataset to evaluate the algorithms and visual analytics system. The results demonstrate that FMM achieves a superior performance by replacing repeated routing queries with hash table lookups. BP-CCSM considerably outperforms three state-of-the-art algorithms in terms of running time and memory consumption. SPET enables the user to efficiently and conveniently explore spatial and temporal variations of CSPs in network-constrained movement. / <p>QC 20171122</p>

L'information occupe désormais une place centrale dans notre vie quotidienne, elle est à la fois omniprésente et facile d'accès. Pourtant, l'extraction de l'information à partir des données est un processus souvent inaccessible. En effet, même si les méthodes de fouilles de données sont maintenant accessibles à tous, les résultats de ces fouilles sont souvent complexes à obtenir et à exploiter pour l'utilisateur. La fouille de motifs combinée à l'utilisation de contraintes est une direction très prometteuse de la littérature pour à la fois améliorer l'efficience de la fouille et rendre ses résultats plus appréhendables par l'utilisateur. Cependant, la combinaison de contraintes désirée par l'utilisateur est souvent problématique car, elle n'est pas toujours adaptable aux caractéristiques des données fouillées tel que le bruit. Dans cette thèse, nous proposons deux nouvelles contraintes et un algorithme pour pallier ce problème. La contrainte de robustesse permet de fouiller des données bruitées en conservant la valeur ajoutée de la contrainte de contiguïté. La contrainte de clôture allégée améliore l'appréhendabilité de la fouille de motifs tout en étant plus résistante au bruit que la contrainte de clôture classique. L'algorithme C3Ro est un algorithme générique de fouille de motifs séquentiels intégrant de nombreuses contraintes, notamment les deux nouvelles contraintes que nous avons introduites, afin de proposer à l'utilisateur la fouille la plus efficiente possible tout en réduisant au maximum la taille de l'ensemble des motifs extraits. C3Ro rivalise avec les meilleurs algorithmes de fouille de motifs de la littérature en termes de temps d'exécution tout en consommant significativement moins de mémoire. C3Ro a été expérimenté dans le cadre de l’extraction de compétences présentes dans les offres d'emploi sur le Web / Information now occupies a central place in our daily lives, it is both ubiquitous and easy to access. Yet extracting information from data is often an inaccessible process. Indeed, even though data mining methods are now accessible to all, the results of these mining are often complex to obtain and exploit for the user. Pattern mining combined with the use of constraints is a very promising direction of the literature to both improve the efficiency of the mining and make its results more apprehensible to the user. However, the combination of constraints desired by the user is often problematic because it does not always fit with the characteristics of the searched data such as noise. In this thesis, we propose two new constraints and an algorithm to overcome this issue. The robustness constraint allows to mine noisy data while preserving the added value of the contiguity constraint. The extended closedness constraint improves the apprehensibility of the set of extracted patterns while being more noise-resistant than the conventional closedness constraint. The C3Ro algorithm is a generic sequential pattern mining algorithm that integrates many constraints, including the two new constraints that we have introduced, to provide the user the most efficient mining possible while reducing the size of the set of extracted patterns. C3Ro competes with the best pattern mining algorithms in the literature in terms of execution time while consuming significantly less memory. C3Ro has been experienced in extracting competencies from web-based job postings

This research study examines the relationship between conjunctive cohesion and relational coherence in students' narrative and expository compositions and writing quality (here defined in terms of teachers' ratings). Altogether 64 compositions were analysed using Halliday and Hasan's (1976) cohesion theory and Crombie's (1985) set of interpropositional relations. The results of the study show that both conjunctive cohesion density and relational coherence, as defined by the density of contiguous functional relations, affect perceptions of writing quality. Writers of low-rated narrative and low-rated expository compositions not only used a more limited range of conjunctives but their compositions manifested less cohesion density and contiguous relation density than writers of high-rated narrative and expository compositions did. / Linguistics / M. A. (Applied Linguistics)

This research study examines the relationship between conjunctive cohesion and relational coherence in students' narrative and expository compositions and writing quality (here defined in terms of teachers' ratings). Altogether 64 compositions were analysed using Halliday and Hasan's (1976) cohesion theory and Crombie's (1985) set of interpropositional relations. The results of the study show that both conjunctive cohesion density and relational coherence, as defined by the density of contiguous functional relations, affect perceptions of writing quality. Writers of low-rated narrative and low-rated expository compositions not only used a more limited range of conjunctives but their compositions manifested less cohesion density and contiguous relation density than writers of high-rated narrative and expository compositions did. / Linguistics and Modern Languages / M. A. (Applied Linguistics)

The development of new high throughput technologies able to multiplex disease biomarkers as well as advances in medical treatments has lead to the recent expansion of the newborn screening panel to include DNA-based targets. Four rare disorders; deletion 22q11.2 syndrome and Spinal Muscular Atrophy (SMA), Severe Combined Immunodeficiency (SCID) and Congenital Cytomegalovirus (CMV), are potential candidates for inclusion to the newborn screening panel within the next few years. The major focus of this study was to determine whether 5’-hydrolysis assays developed for the four distinct disorders with specific detection needs and analytical ranges could be combined on the OpenArray system and in multiplexed qPCR reactions. SNP detection of homozygous SMN1 deletions in SMA, CNV detection in the 22q11.2 critical region, and quantification of the SCID biomarker, T-cell receptor excision circles (TRECs) and CMV were all required for disease confirmation. SMA and 22q11.2 gene deletions were accurately detected using the OpenArray system, a first for the technology. The medium density deletion 22q11.2 multiplex successfully identified deletion carriers having either the larger 3 Mb deletion or the smaller 1.5 Mb deletions. Both TREC and CMV targets were detected but with a decrease in sensitivity when compared to their singleplex counterparts. Lastly, copy number detection of the TBX1 was performed when multiplexed with the TREC assay, without a decrease in detection limit of either assay. Here, we provide proof of principal that qPCR multiplexing technologies are amenable to implementation with a newborn screening laboratory.