Information protection is a key issue for the acceptance and adoption of pervasive computing systems where various portable devices such as smart phones, Personal Digital Assistants (PDAs) and laptop computers are being used to share information and to access digital resources via wireless connection to the Internet. Because these are resources constrained devices and highly mobile, changes in the environmental context or device context can affect the security of the system a great deal. A proper security mechanism must be put in place which is able to cope with changing environmental and system context. Usage CONtrol (UCON) model is the latest major enhancement of the traditional access control models which enables mutability of subject and object attributes, and continuity of control on usage of resources. In UCON, access permission decision is based on three factors: authorisations, obligations and conditions. While authorisations and obligations are requirements that must be fulfilled by the subject and the object, conditions are subject and object independent requirements that must be satisfied by the environment. As a consequence, access permission may be revoked (and the access stopped) as a result of changes in the environment regardless of whether the authorisations and obligations requirements are met. This constitutes a major shortcoming of the UCON model in pervasive computing systems which constantly strive to adapt to environmental changes so as to minimise disruptions to the user. We propose a Context-Aware and Adaptive Usage Control (CA-UCON) model which extends the traditional UCON model to enable adaptation to environmental changes in the aim of preserving continuity of access. Indeed, when the authorisation and obligations requirements are fulfilled by the subject and object, and the conditions requirements fail due to changes in the environmental or the system context, our proposed model CA-UCON triggers specific actions in order to adapt to the new situation, so as to ensure continuity of usage. We then propose an architecture of CA-UCON model, presenting its various components. In this model, we integrated the adaptation decision with usage decision architecture, the comprehensive definition of each components and reveals the functions performed by each components in the architecture are presented. We also propose a novel computational model of our CA-UCON architecture. This model is formally specified as a finite state machine. It demonstrates how the access request of the subject is handled in CA-UCON model, including detail with regards to revoking of access and actions undertaken due to context changes. The extension of the original UCON architecture can be understood from this model. The formal specification of the CA-UCON is presented utilising the Calculus of Context-aware Ambients (CCA). This mathematical notation is considered suitable for modelling mobile and context-aware systems and has been preferred over alternatives for the following reasons: (i) Mobility and Context awareness are primitive constructs in CCA; (ii) A system's properties can be formally analysed; (iii) Most importantly, CCA specifications are executable allowing early validation of system properties and accelerated development of prototypes. For evaluation of CA-UCON model, a real-world case study of a ubiquitous learning (u-learning) system is selected. We propose a CA-UCON model for the u-learning system. This model is then formalised in CCA and the resultant specification is executed and analysed using an execution environment of CCA. Finally, we investigate the enforcement approaches for CA-UCON model. We present the CA-UCON reference monitor architecture with its components. We then proceed to demonstrate three types of enforcement architectures of the CA-UCON model: centralised architecture, distributed architecture and hybrid architecture. These are discussed in detail, including the analysis of their merits and drawbacks.

Encouraging the uptake of energy efficient vehicles (EEVs) is an aspiration of critical importance in a day and age in which we are confronted with the increasingly dire consequences of human behaviour on our planet, and on the planet for generations to come. The transport sector is one of the highest contributors of anthropogenic greenhouse gas emissions, whilst pollution from this sector is responsible for a large proportion of human deaths each and every year. Given the severity of these issues, it is more important than ever for policy-makers, and researchers alike, to encourage a transition within the community towards more sustainable lifestyles. Transportation is key to this change. As a service that every human being uses, almost every day of his or her life, the transport sector presents a unique opportunity for behavioural change. Through efficient and targeted policies, consumers can be incentivised to make more sustainable transport choices and to consider the consequences of their own actions. Foremost amongst these initiatives is that of encouraging a transition towards energy efficient vehicles. This thesis has been produced in order to shed further light on issues affecting this transition. In particular for policy-makers, this document includes a series of recommendations based on prevailing findings in the current literature, in addition to the novel and significant findings of this research effort. These include the various lessons learnt from government policies that have already been implemented in regions around the globe. As a thesis by publication, this document consists of four research articles that investigate factors affecting the EEV market, specifically in terms of: consumer demand, vehicle usage and product pricing. A number of other demographic and economic factors have also been examined, including the role of economies-of-scale. / Att uppmuntra ökad användningen av energieffektiva fordon (EEVs) är en strävan av avgörande betydelse i en tid då vi konfronteras med de allt mer ödesdigra konsekvenserna av människors påverkan på vår planet, i dag och för kommande generationer. Transportsektorn är en av de sektorer som bidrar mest till utsläppen av antropogena växthusgaser. Utsläpp från transportsektorn bidrar även till ett stort antal dödsfall varje år. Med tanke på vikten av dessa frågor är det viktigare än någonsin för beslutsfattare och forskare att bidra till en samhällsövergång mot mer hållbara livsstilar. Transporter är avgörande i denna omvandling. Eftersom transporter är en tjänst som alla människor utnyttjar i stort sett varje dag, erbjuder transportsektorn en unik möjlighet till beteendeförändringar. Genom effektiva och målinriktade åtgärder kan konsumenter ges incitament att göra mer hållbara transportval och överväga konsekvenserna av sina handlingar. Främst bland dessa initiativ är en uppmuntran till en övergång mot mer energieffektiva fordon. Denna avhandling har tagits fram i syfte att belysa frågeställningar som berör denna övergång. För framför allt beslutsfattare innehåller avhandlingen en rad rekommendationer baserade på såväl rådande forskningsresultat från aktuell forskningslitteratur som nya resultat från denna forskningsinsats. Dessa inkluderar erfarenheter från redan implementerade politiska åtgärder från regioner runt om i världen. Denna sammanläggningsavhandling består av fyra forskningsartiklar som undersöker faktorer som påverkar EEV-marknaden vad gäller konsumentefterfrågan, fordonsanvändning och produktprissättning. Utöver dessa har även ett antal andra demografiska och ekonomiska faktorer, inklusive betydelsen av stordriftsfördelar, undersökts. / <p>QC 20160503</p>

The aim of this study is to analyze the use of different media channels occurred within a natural disaster situation. This research focuses specifically on charting the factors that affect audiences in their choice of media channels and how these factors ultimately lead to the complimentarily use of sources. This study is based on channel complementarity theory and utilizes a qualitative method consisting of semi-structured interviews and has been complemented with a survey that respondents were required to complete prior to the interview. The twelve college students that made up the sample for this study were selected through convenient and purposive means and have personally been involved in natural disaster situations without exception. Final results and analysis suggest that individuals utilize several media channels combined, at different points in time or simultaneously, and in random order during a natural disaster. The analysis of the results also shows that individuals use this variety of media channels in order to obtain two different perspectives: broad and narrow. Traditional media channels such as radio and television are shown to be used in order to obtain the broader perspective during a natural disaster event. In contrast, social media like Instagram, Facebook, and Snapchat are used to gain the narrower perspective. The findings of this study also suggest that factors affecting media choices are accentuated by a crisis such as a natural disaster and are intrinsically connected to specific needs audiences have at one particular point in time. The most relevant factors contributing to the choice of media type and leading to channel complementarity found in this study are accessibility, compatibility of sources, tailorability, and humor appeal. Controversially, credibility appears to be disregarded as a key factor, even though it is still perceived as an influential characteristic.

Thesis (MA)--University of Stellenbosch, 2003. / ENGLISH ABSTRACT: This study aims to investigate the speech act of complimenting in Xhosa. The study constitutes of six chapters with respective to execute this aim. Chapter one provides special details regarding the aim of this study, the method that has been followed, and the organisational structure of the study. Chapter two focuses on both speech act and politeness theories. The central notion relates to (a) the acts of locution, (b) illocution and (c) perlocution. These elements of speech acts entail the notion that utterances that are produced by participants in a conversation comprises of (a) the actual sounds and words uttered, and those words and sounds (b) are intended towards the fulfilment of the force or intention behind them and (c) the effect of that force is intended to the hearer. Although there are other related elements, this notion is prominent in this chapter. Chapter three examines speech acts of complimenting in Xhosa along with their responses. This examination is informed by various ideas from respective researchers. For an effective and successful investigation of speech acts, a guideline which serves as a base follows a model of ethnography of communication. Almost all these researchers are putting emphasis on this view. This chapter takes this issue further by exploring the differences in compliments and responses with reference to gender, along with other qualities that have been mentioned. The elements of the responses the principles, their nature, structure and appearance in general conversations with specific reference to complimenting, are other key properties examined in this chapter. Chapter four focuses on the functions of the compliments. For example, almost all the researchers in the field are in agreement that compliments serve to revitalize, establish or create or encourage solidarity. Although there are other functions relating to this speech act, such as replacing other conversational formulas, e.g. greetings, softening criticism, the function of solidarity is perceived to be central. Another area which receives attention is the structural qualities of the compliment, along with syntactic and lexical features. This analysis explores the syntactic categories that relate to this work, together with the formulaic nature of this speech act. In addition, the status and gender of the participants in an interaction, as informed by situations or friends who like to be complimented, are all matters that receive scrutiny in this chapter. Chapter five constitute the central part of the study. The differences in compliments and responses receive attention with the aim of establishing possible difference between compliments given by males and females. Chapter six is the last chapter, it presents the findings and conclusion of the study. / AFRIKAANSE OPSOMMING: Hierdie studie het as doelstelling die ondersoek van die spraakhandeling van komplimentering in Xhosa. Die tesis beslaan ses hoofstukke wat gestruktureer is om uitvoering te gee aan hierdie doelstelling. Hoofstuk een gee spesifieke besonderhede betreffende die doelstelling van die studie, die metode wat gevolg word, en die organisasie van die studie. Hoofstuk twee fokus op spraakhandelingsteorie en hoflikheidsteorie. Die sentrale konsep hou verband met (a) die handelinge van lokusie, (b) ilokusie en (c) perlokusie. Hierdie elemente van spraakhandelinge behels die begrip dat die uitinge wat deur deelnemers in 'n gesprek geproduseer word bestaan uit (a) die werklike klanke en woorde wat geuiter word, en wat (b) die intensie het om uitdrukking te gee aan die fors daaragter, en (c) die effek is gerig op die hoorder. Hierdie oorweging is sentraal in die hoofstuk. Hoofstuk drie ondersoek die spraakhandeling van komplimentering in Xhosa tesame met die response daarop. Hierdie ondersoek word ingelig deur sieninge van verskillende navorsers. Vir die effektiewe ondersoek van spraakhandelinge, is 'n rigtinggewende basis vanuit die etnografie van kommunikasie nodig. Hierdie hoofstuk ondersoek die verskille in komplimente en die response daarop met betrekking tot gender en ander eienskappe. Die aspekte van die response, hulle beginsels, aard, en struktuur, en die gebruik daarvan in gesprekke wat komplimente bevat, word ondersoek. Hoofstuk vier fokus op die funksies van komplimente. Feitlik al die navorsers in die veld van komplimentering stem saam dat komplimente die doel het om solidariteit te skep of te versterk. Alhoewel daar ander funksies is van komplimentering, bv. die verplasing van gespreksformules, soos groet, kritiek, is die bevestiging van solidariteit sentraal. 'n Ander area wat aandag kry in die hoofstuk, is die strukturele kenmerke van komplimente, insluitende sintaktiese en leksikale kenmerke. Die analises behels 'n ondersoek na die sintaktiese kategorieë wat komplimente realiseer, tesame met die formule-agtige aard van komplimente as spraakhandelinge. Voorts word die status en gender van die gespreksgenote ondersoek. Hoofstuk vyf vorm die sentrale deel van die studie betreffende die bepaling van moontlike gender verskille in komplimente. Hoofstuk ses bied die samevatting en gevolgtrekkings van die studie. / ISISHWANKATHELO: Esi sifundo sikwiphulo lokuphanda ngezenzo zentetho zezincomo. Kuqulunqwe izahluko ezintandathu ezineenjongo ezahlukiyo ukufezekisa eli phulo. Isahluko sokuqala sinika umkhombandlela malunga nenjongo yesifundo, imethodi elandelweyo kananjalo nolwakhiwo zinikwa ingqwalasela. Isahluko sesibini sinika ingqwalasela kwithiyori yezenzo zentetho kananjalo neyentlonelo. Uluvo olungundoqo nolunika umdla kule ngxelo luqulathe izenzo ze (a) ilokhushini, (b) 1- ilokhushini ne (c) nephelokhushini. Ezi zenzo zixhibe ingcamango yokuba intetho eveliswa ngabo bathatha inxaxheba kunxibelelwano iqulathe (a) izandi zolwakhiwo Iwesigama, ukuze eso sigama (b) sijoliswe kwinjongo ethile ekuyimfuneko ukuba iphunyezwe ekugqibeleni (c) ifuthe laloo mpumelelo lingqale lowo kunxityelelwano naye okanye umphulaphuli. Nasekubeni ekhona namanye amasolotya axhagileyo, kodwa le ngcamango iphawuliweyo iphume izandla kwesi sahluko. Isahluko sesithathu siphonononga izenzo zeentetho zezincomo kananjalo neempendulo zazo. Olu phononongo lungqongwe zizimvo zeengcali eziphuma kwiinkalo ngeenkalo. Umkhombandlela osisikhokhelo kwiphulo lophando Iwezenzo zeentetho naziphi na, ukuze lube yimpumelelo kwaye lusulungeke kufuneka luiandeie imodeli okanye umgaqo weethinografi yonxibelelwano phantse bonke aba baphandi babeke umnwe kule ngcamango. Ngokunxusa oku, esi sahluko, xa sihlabela mgama, siphawula ngeyantlukwano yezincomo neempendulo zazo ngesini, nangezinye iimpawu ezikhankanyiweyo. Uqulunkqo Iwemigaqo yokuphendula, ubunjani, ubume nembonakalo yayo entethweni gabalala ngokunxulumene nezincomo ngamanye amasolotya abalulekileyo nanika umdla kwesi sahluko. Isahluko sesine sinika ingqwalaselo kwimisebenzi yesincomo. Umzekelo, phantse zonke ezi ngcali zikweli phulo ziyayingqina nento yokuba izincomo zivuselela , ziyila okanye zikhuthaza umanyano. Nangona ibonakala ikhona eminye imisebenzi ekhankanywayo engqonge esi senzo sentetho njengokuthabatha indawo yezinye zeefomuia zonxulumano, umz. imibulisi, ukuthomakalisa ugxeko-ncomo, olu luvo lomanyano lubonwa njengoluhamba phambili. Enye indima ephononongwayo ziimpawu zolwakhiwo Iwezincomo, kananjalo neempawu zesintaksi neleksikali. Olu hlalutyo lulo oludulisa izigaba zentetho ezibandakanyekayo kananjalo nobufomula besi senzo sentetho. Ukwaleka, iwonga nesini sabo bathabatha inxaxheba kolu nxibelelwano ngokulawulwa ziimeko okanye izihlobo ezikholisa ukunconywa, konke oku yimibandela efumana ukuphicothwa kwesi sahluko. Isahluko sesihlanu siqulathe umongo wesi sifundo. Uhlalutyo Iwezincomo neempendulo zazo lunikwa ingqwalasela ngamehlo abukhali; ngeenjongo zokufumanisa umahluko ongaba ukhona phakathi kwezincomo zamaduna namabhinqa. Isahluko sesithandathu nesokugqibela sinika iziphumo zophando nesiphelo sesi sifundo.

Thesis (MA)--Stellenbosch University, 2004. / ENGLISH ABSTRACT: This study focuses on a critical examination of the communication-theoretic properties of persuasive messages in the Volunteer campaign in South Africa. Five articles have been analysed according to two premises which form the theory of Larson (1975), entailing content premises and process premises. The content premise is used in the analysis of two articles of this study, namely: the first and the fifth article, and it concentrates solely on the theme on both articles. The theme concentrates on persuasive messages in the letsema/ilima volunteer campaign in South Africa. In the analysis of the content premises emphasis is put on the cause to effect reasoning. The other articles focus on the process premises only. The process premises focus on the three different types of processes, namely: the need, the attitude and consistency. As regard the need, the study puts emphasis on the esteem need. As regard attitude, emphasis is put on the evaluative responses. As regard the consistency, emphasis is put on the two types of consistency, namely: consonance and dissonance. In terms of consonance, emphasis is on the analysis of reassurance of security. In terms of dissonance, emphasis is on the analysis of sense of guilt. / AFRIKAANSE OPSOMMING: Hierdie studie fokus op 'n kritiese ondersoek van die kommunikasie-teoretiese eienskappe van oorredende boodskappe in die Vrywilligerveldog in Suid-Afrika. Vyf artikels word ontleed in die studie binne die raamwerk van twee premises van Larson (1975), nl. die inhoudpremis en die prosespremis. Die inhoudpremises word aangewend in die analise van twee artikels, nl. die eerste en die vyfde artikel, en daar word uitsluitlik gefokus op die tema van hierdie artikels. Die tema in hierdie artikels hou direk verband met oorredende boodskappe in die letsema/ilima vrywilligerveldtog. In die analise van die inhoudpremises word veral klem geplaas op die oorsaak-effek redenasie. Die analise van die ander drie artikels fokus op die prosespremise. Die prosespremise fokus op drie verskillende prosesse, naamlik die behoeftepremis, die houdingpremis, en die konsekwentheidpremis. Aangaande die behoeftepremis, word klem geplaas in die ondersoek op die waarde-behoefte. Ten opsigte van die houdingspremis, is die klem op die evaluatiewe response. Rakende die konsekwentheidspremis, beklemtoon die analise twee soorte konsekwentheid, naamlik konsonansie en dissonansie. Die ondersoek van konsonansie fokus op die versekering van sekureiteit, terwyl die analise van dissonansie, klem plaas op die analise van skuld. / ISIXHOSA ISISHWANKATHELO: Esi sifundo sijolise kwimiyalezo elukuhlayo ejolise kwilima eMzantsi Afrika. Ekwenzeni oku, kuhlalutywe amaphetshana amahlanu ngokwezindululo zesiseko ezibini ezize noLarson (1975) ezizezi: Isiqulatho sesindululo sesiseko nenkqubo yesindululo sesiseko. Isiqulatho sesindululo sesiseko sisetyenziswe kumaphetshana amabini angala: elokuqala nelesihlanu, kwaye siqwalasela umxholo kuwo omabini la maphetshana. Lo mxholo uqwalaselweyo ngulowo ujongene nemiyalezo yolukuhlo kwiphulo lokwenza ilima eMzantsi Afrika. Kwisiqulatho sesindululo sesiseko kugxininiswe kwingqiqo kanobangela ukuya kwisiphumo. Kwamanye amaphetshana kuqwalaselwe inkqubo yesindululo sesiseko kuphela. Inkqubo yesindululo sesiseko inike ingqwalasela kwiindidi ezintathu zeenkqubo ezizezi: Imfuno, isimilo nokungaguquguquki. Kwimfuno ingqwalasela ibekwe ibekwe kwimfuno yokuzingca. Kwisimilo ingqwalasela ibekwe kwiimpendulo zokuhlola. Kukungaguquguquki ingwalasela ibekwe kuzo zombini iindidi zokungaguquguquki ezizezi: Isivumelwano nokungavumelani. Kwisivumelwano kubekwe ingqwalasela ikakhulu kwisiqinisekiso sokhuseleko. Ekungavumelanini kugxininiswe kuhlobo Iwako olubizwa ngokuba luluvo lokuba netyala.

Thesis (MA)--Stellenbosch University, 2001. / ENGLISH ABSTRACT: This study investigates the speech act of complaining in Xhosa. It is organized into six chapters. Chapter 1 states the aim of the study. The method, design and the organization of the study are also presented. In Chapter 2 the speech acts and politeness theories are presented as the basic framework of this study. It is clear that people do not only produce utterances, which contain grammatical structures and words when attempting to express themselves, but they always perform actions via those utterances. The actions people perform via their utterances are done in accordance within a certain area of linguistic pragmatics. Chapter 3 deals with the speech act of complaining as discussed by various theorists. Chapter 4 is concerned with complaints strategies. Here it is revealed that one must be able to voice one's annoyance or anger while at the same time it is important to avoid embarrassment by creating a situation in which it becomes impossible for him/her to face the aversiveness of taking the blame. Chapter 5 deals with complaint situations in Xhosa. In order to make sense of what is said during an interaction, various factors have been examined, which relate to social distance and closeness. The relative status of the participants is based on social values. Complaint situations are divided into three social groups: power relations, friendship and strangers. Power relations involve people of superior and low status. This group is divided into two subgroups: people with superior status to people with low status and vice versa; those speakers with a lower status in a Xhosa speaking context tend to mark social distance between themselves and higher status speakers. Among friends, there is no social distance because people tend to treat one another as equals. The same is true of strangers, although they don't know each other; they tend to treat one another with mutual respect. Most of the time complaints in Xhosa express disapproval or negative feelings towards the source of the complaint. Complaints sometimes can be impolite. They can lead to conflict as they are sometimes very threatening, accusing and cursing. That is why a number of strategies have been introduced to a complainant who wants to avoid direct confrontation with the complainee. The indirect accusation strategy is the number one tool, which is always used by the complainers to avoid conflict, unlike annoyance, direct accusation and explicit blame of the accused's action or of the accused as a person. People who use indirect accusations do not want to run the risk of losing face, unlike the direct accusation, which is face-threatening. Responding to a complaint is also an important factor as it promotes further interaction. Response serves as a way of displaying interest in what the speaker is saying. It has been noticed that response gives the speakers the opportunity to voice their feelings. Finally, Chapter 6 presents the conclusions of the investigation and the main findings of the study are summarized. / AFRIKAANSE OPSOMMING: Hierdie studie ondersoek die spraakhandeling van klagte in Xhosa. Dit is georganiseer in ses hoofstukke. Hoofstuk 1 bied die doelstelling van die studie. Die metode, ontwerp en organisasie van die studie word ook bespreek. In Hoofstuk2 word die spraakhandelinge en beleefdheidsteorieë bespreek as die raamwerk van die studie. Dit word duidelik gemaak dat mense nie slegs uitinge produseer wat grammatikale strukture en woorde bevat nie, maar hulle voer altyd aksies uit via die uitinge. Hierdie aksies wat mense uitvoer via hulle uitinge word gedoen in ooreenstemming in bepaalde area van linguistiese pragmatiek. Hoofstuk 3 behandel in die besonder die spraakhandeling van klagte soos ondersoek deur verskillende navorsers. Hoofstuk 4 behandel klagte-strategieë. Hier word aangedui dat 'n spreker in staat moet wees om hy/sy se ontevredenheid of woede te lug terwyl dit terselfdertyd belangrik is om verleentheid te vermy deur die skep van 'n situasie waar dit vir hom/haar onmoontlik maak om te staan te kom voor die neem van die blaam. Hoofstuk 5 ondersoek klagte-situasies in Xhosa. Ten einde sin te maak oor wat gesê word en 'n interaksie, is verskeie faktore ondersoek wat verband hou met sosiale opstand en nabyheid. Die realtiewe status van die deelnemers word gebaseer op sosiale waardes. Klagte-situasies kan verdeel word in terme van drie sosiale groepe: magsverhoudinge, vriendskap en vreemdelingskap. Magsverhoudinge hou verband met die verhoudinge tussen mense met hoë en lae status. Hierdie groep word verdeel in twee sub-groepe: mense met superieuse status en mense met lae status en omgekeerd. Persone met 'n laer status in 'n Xhosasprekende konteks is geneig om sosiale afstand te markeer tussen hulleself en hoër status sprekers. Daar is geen sosiale opstand tussen vriende nie, omdat sulke persone geneig is om mekaar as gelykes te behandel. Dieselfde is waar van vreemdelinge, want alhoewel hulle mekaar nie ken nie, is hulle geneig om mekaar met respek te behandel. Die meeste van die klagtes oor tyd in Xhosa gee druk misnoeë of negatiewe gevoelens uit met betrekking tot die bron van die klagte. Klagtes kan soms onbeleefd wees. Hulle kan lei tot konflik, aangesien hulle soms baie bedreigend aantygend en beledigend kan wees. Daarom is 'n aantal strategieë beskikbaar vir 'n klaer wat direkte konfrontasie wil vermy teenoor die persoon waarteen gekla word. Die indirekte aantyging strategie is die voorkeur strategie wat deur die klaers gebruik word kom konflik te vermy, in teenstelling met kwaad word direkte aantyging en eksplisiete blaam van die aangetygde persoon se aksie of die persoon self. Persone wat indirekte aantygings gebruik, wil nie die risiko loop om "gesig" (face) te verloor nie, in teenstelling met die direkte aantyging, wat gesig-bedreiging is. Om te reageer op 'n klagte, is ook 'n belangrike faktor, aangesien dit verdere interaksie aanmoedig. Die gee van 'n reaksie is 'n wyse om aan te toon dat daar belangstelling is in wat die spreker sê. Daar is aangetoon dat 'n reaksie vir sprekers die geleentheid gee om hulle gevoelens te lug. Laastens, gee Hoofstuk 6 die gevolgtrekkings van die ondersoek, en die belangrikste bevindinge van die studie word opgesom.

ITC/USA 2011 Conference Proceedings / The Forty-Seventh Annual International Telemetering Conference and Technical Exhibition / October 24-27, 2011 / Bally's Las Vegas, Las Vegas, Nevada / Although the wireless data transmission technologies have evolved significantly, data recording devices are still being used because of the limitations of data rates and reliability issues over wireless environment in the avionics, military, space etc. Payload has limitation of weight. In addition, storage has limitation of capacity. So, we need to research about a data recording structure within a limited amount of memory. In this paper, we propose a new data recording structure through a condition necessary for efficient use of memory. The proposed structure has an equivalent function as other recording systems. But, it uses less memory than the other equivalent recording structures.

published_or_final_version / English Studies / Master / Master of Arts

This paper utilizes prior studies attempting to explain different possible phonological production errors among adults who learn American Sign Language (ASL) as a second language (L2). These studies have offered theoretical grounding to such production errors. One area of study in particular is further explored in this paper and that is how specific joints of the arm and hand are used in the production of signs (Mirus, et al., 2001, Meier, et al 2008). L2 learners of ASL are essentially learning a new language using a different modality and this new modality requires that they relearn how to use specific motor skills needed in order to produce sign vocabulary. To address this, an exploratory teaching module is proposed with the need for further action research to discuss its effectiveness. / text

With the emergence of the Internet and of the World Wide Web, the Web site has become a key communication channel in organizations. To satisfy the objectives of the Web site and of its target audience, adapting the Web site content to the users' expectations has become a major concern. In this context, Web usage mining, a relatively new research area, and Web analytics, a part of Web usage mining that has most emerged in the corporate world, offer many Web communication analysis techniques. These techniques include prediction of the user's behaviour within the site, comparison between expected and actual Web site usage, adjustment of the Web site with respect to the users' interests, and mining and analyzing Web usage data to discover interesting metrics and usage patterns. However, Web usage mining and Web analytics suffer from significant drawbacks when it comes to support the decision-making process at the higher levels in the organization. Indeed, according to organizations theory, the higher levels in the organizations need summarized and conceptual information to take fast, high-level, and effective decisions. For Web sites, these levels include the organization managers and the Web site chief editors. At these levels, the results produced by Web analytics tools are mostly useless. Indeed, most of these results target Web designers and Web developers. Summary reports like the number of visitors and the number of page views can be of some interest to the organization manager but these results are poor. Finally, page-group and directory hits give the Web site chief editor conceptual results, but these are limited by several problems like page synonymy (several pages contain the same topic), page polysemy (a page contains several topics), page temporality, and page volatility. Web usage mining research projects on their part have mostly left aside Web analytics and its limitations and have focused on other research paths. Examples of these paths are usage pattern analysis, personalization, system improvement, site structure modification, marketing business intelligence, and usage characterization. A potential contribution to Web analytics can be found in research about reverse clustering analysis, a technique based on self-organizing feature maps. This technique integrates Web usage mining and Web content mining in order to rank the Web site pages according to an original popularity score. However, the algorithm is not scalable and does not answer the page-polysemy, page-synonymy, page-temporality, and page-volatility problems. As a consequence, these approaches fail at delivering summarized and conceptual results. An interesting attempt to obtain such results has been the Information Scent algorithm, which produces a list of term vectors representing the visitors' needs. These vectors provide a semantic representation of the visitors' needs and can be easily interpreted. Unfortunately, the results suffer from term polysemy and term synonymy, are visit-centric rather than site-centric, and are not scalable to produce. Finally, according to a recent survey, no Web usage mining research project has proposed a satisfying solution to provide site-wide summarized and conceptual audience metrics. In this dissertation, we present our solution to answer the need for summarized and conceptual audience metrics in Web analytics. We first described several methods for mining the Web pages output by Web servers. These methods include content journaling, script parsing, server monitoring, network monitoring, and client-side mining. These techniques can be used alone or in combination to mine the Web pages output by any Web site. Then, the occurrences of taxonomy terms in these pages can be aggregated to provide concept-based audience metrics. To evaluate the results, we implement a prototype and run a number of test cases with real Web sites. According to the first experiments with our prototype and SQL Server OLAP Analysis Service, concept-based metrics prove extremely summarized and much more intuitive than page-based metrics. As a consequence, concept-based metrics can be exploited at higher levels in the organization. For example, organization managers can redefine the organization strategy according to the visitors' interests. Concept-based metrics also give an intuitive view of the messages delivered through the Web site and allow to adapt the Web site communication to the organization objectives. The Web site chief editor on his part can interpret the metrics to redefine the publishing orders and redefine the sub-editors' writing tasks. As decisions at higher levels in the organization should be more effective, concept-based metrics should significantly contribute to Web usage mining and Web analytics.