This mini-dissertation deals with the market demand for campus recreation at the North-West University’s (NWU) Potchefstroom Campus. The market demand refers to the proposed needs for recreation activities on-campus among fulltime undergraduate students studying at the Potchefstroom Campus. For the purpose of the study, undergraduate students (n = 327) were requested to complete a questionnaire containing questions related to reasons for recreational sport participation and constraints hindering participation, as identified by literature. The study was undertaken by using historic, fulltime first- to third-year students studying at the Potchefstroom Campus of the NWU. Participants consisted of a diverse group residing both on-campus and off-campus and also from different faculties, with the exclusion of the Faculties of Law and Theology. Data collected by means of questionnaires was organised and analysed by the Statistical Consultation Services of the NWU (Potchefstroom Campus). Descriptive statistics were used to determine frequencies. It was found that the majority of students participate in the seven major sport codes of the university, and in particular hockey and soccer, followed by tennis and athletics. Even though participation figures for rugby are lower than those for the other seven major sport codes, the participation frequencies by the students are the highest of the major sport codes. The highest additional sport codes that students participated in are cycling, squash, golf, swimming and table tennis. The additional sport codes are predominantly participated in either through hostel teams or with private clubs. It was found that there are five main reasons why students participate in recreational sport, namely for the purpose of challenge and enjoyment, for recognition and achievement, to socialise, for health and physical wellness and to relieve stress. From the mean scores, it appears that the students’ primary reasons for participating in recreational sports are recognition and achievement and to a lesser degree for health and wellness. The study found participation constraints, namely lack of knowledge, lack of interest, individual psychological aspects and accessibility or financial constraints. The constraint experienced most by the students, according to the mean scores, is lack of knowledge about recreational sport. Regarding the students’ recreational sport needs, hockey was mentioned the most, followed by netball, cycling, swimming, tennis and squash. Students prefer to participate in the above mentioned recreational sport activities with hostel teams, whereas very few students prefer to participate on their own. The first recommendation would be to include student development, health and wellness as key components in the current vision of NWU sport. It is also recommended that the NWU revise the information obtained from the Marketing Department regarding the recruitment of future students. Valuable knowledge could be obtained regarding which sports the students were exposed to during their school years and to adjust the additional sport codes accordingly. The third recommendation is the introduction of leisure education during the orientation programme for first-year students. Leisure education will provide the students with the skills to prepare for future events peculiar to campus life. Fourthly it is recommended that, due to the increase in demand for multi-gender sport, the university shall focus on marketing and public awareness of sports such as women’s cricket and rugby for women. The last recommendation refers to the need for more information regarding the management of facilities and grounds. The implementation of a web-based system could increase productivity and may decrease the pressure placed on the utilisation of facilities and grounds. / MBA, North-West University, Potchefstroom Campus, 2014

Master of Science / Department of Psychology / Richard J. Harris / Memory processes have undergone extensive investigation using various experimental methods. While working memory studies have profoundly influenced the development of new cognitive theories, including the Dual-Processing Theory (Mayer & Moreno, 1998), limited research has investigated the effects of subtitled messages on multimedia comprehension. Previous eye movement research has investigated the ability of observers to attend to the multiple sensory inputs associated with multimedia viewing (D’Ydewalle, Van Rensbergen & Pollet, 1987; D’Ydewalle & De Bruycker, 2007); however, eye movement research only scratches the surface of cognitive abilities associated with multimedia learning. In order to satisfy the need for more subtitling research two studies were performed to investigate the effects of subtitled movies on the comprehension of movie content. Both investigations involved the presentation of 10-minute movie clips from A Few Good Men and See No Evil, Hear No Evil. Participants completed three types of multiple-choice recognition questions for each movie, including: pictorial-only questions, verbal-only questions and combined-information questions. Experiment 1 was designed to investigate the difference between levels of comprehension, when verbal information was presented only in the participants’ native language (i.e. English soundtrack and/or subtitles). Results of Experiment 1 indicate that participants performed significantly better on verbal-only and combined-information questions when their native language was present in the subtitles as opposed to the soundtrack. These findings confirm previous findings that reading verbal information in subtitles is more efficient than listening to the soundtrack. Comparison of performance on the pictorial-only questions across presentation formats in Experiment 1 showed participants in the English soundtrack with no subtitles condition performed significantly better than all other conditions. Although Experiment 1 provides a basic understanding of how native language soundtracks and subtitles influence comprehension of movies, subtitled media are primarily used when viewing a movie with verbal information from a foreign language. Experiment 2 built on the results of Experiment 1 by incorporating an unfamiliar language (i.e. French). The question sets used in Experiment 1 were also used in Experiment 2; however, two French vocabulary tests were also used in Experiment 2 to measure incidental foreign language acquisition. Consistent with the results of Experiment 1, participants performed significantly better on verbal-only and combined-information questions when their native language was in the subtitles. This finding extended the conclusion that native language verbal information presented visually (i.e. subtitles) yields better performance on questions requiring verbal cues than native language verbal information presented orally (i.e. soundtrack) to foreign language material. Comparison of performance on the pictorial-only questions across presentation formats in Experiment 2 showed no significant differences. Comparison across the two experiments reflected a distraction effect associated with the presence of a foreign language. Performance on the French vocabulary tests was very poor across all conditions and yielded no significant differences, suggesting that the tasks may have been too difficult.

This mini-dissertation deals with the market demand for campus recreation at the North-West University’s (NWU) Potchefstroom Campus. The market demand refers to the proposed needs for recreation activities on-campus among fulltime undergraduate students studying at the Potchefstroom Campus. For the purpose of the study, undergraduate students (n = 327) were requested to complete a questionnaire containing questions related to reasons for recreational sport participation and constraints hindering participation, as identified by literature. The study was undertaken by using historic, fulltime first- to third-year students studying at the Potchefstroom Campus of the NWU. Participants consisted of a diverse group residing both on-campus and off-campus and also from different faculties, with the exclusion of the Faculties of Law and Theology. Data collected by means of questionnaires was organised and analysed by the Statistical Consultation Services of the NWU (Potchefstroom Campus). Descriptive statistics were used to determine frequencies. It was found that the majority of students participate in the seven major sport codes of the university, and in particular hockey and soccer, followed by tennis and athletics. Even though participation figures for rugby are lower than those for the other seven major sport codes, the participation frequencies by the students are the highest of the major sport codes. The highest additional sport codes that students participated in are cycling, squash, golf, swimming and table tennis. The additional sport codes are predominantly participated in either through hostel teams or with private clubs. It was found that there are five main reasons why students participate in recreational sport, namely for the purpose of challenge and enjoyment, for recognition and achievement, to socialise, for health and physical wellness and to relieve stress. From the mean scores, it appears that the students’ primary reasons for participating in recreational sports are recognition and achievement and to a lesser degree for health and wellness. The study found participation constraints, namely lack of knowledge, lack of interest, individual psychological aspects and accessibility or financial constraints. The constraint experienced most by the students, according to the mean scores, is lack of knowledge about recreational sport. Regarding the students’ recreational sport needs, hockey was mentioned the most, followed by netball, cycling, swimming, tennis and squash. Students prefer to participate in the above mentioned recreational sport activities with hostel teams, whereas very few students prefer to participate on their own. The first recommendation would be to include student development, health and wellness as key components in the current vision of NWU sport. It is also recommended that the NWU revise the information obtained from the Marketing Department regarding the recruitment of future students. Valuable knowledge could be obtained regarding which sports the students were exposed to during their school years and to adjust the additional sport codes accordingly. The third recommendation is the introduction of leisure education during the orientation programme for first-year students. Leisure education will provide the students with the skills to prepare for future events peculiar to campus life. Fourthly it is recommended that, due to the increase in demand for multi-gender sport, the university shall focus on marketing and public awareness of sports such as women’s cricket and rugby for women. The last recommendation refers to the need for more information regarding the management of facilities and grounds. The implementation of a web-based system could increase productivity and may decrease the pressure placed on the utilisation of facilities and grounds. / MBA, North-West University, Potchefstroom Campus, 2014

The important role played by tertiary institutions in South Africa with regard to the general development of the country, cannot be disputed. To ensure that tertiary institutions provide education of high quality, competent employees are needed. These employees however have to be paid competitive salary packages. Employee benefits, which form 40 percent of an employer's payroll costs, constitute an important cost component and need to be scrutinised more closely with the aim of managing it as efficiently and effectively as possible. To achieve this goal the primary purpose of this research is thus to determine to what extent the present employee benefits provided by tertiary institutions in South Africa, address the diverse needs of employees. From the empirical study it is clear that employees' awareness of benefits offered and their divergent preferences, necessitates a more flexible approach to the management of benefits. A flexible benefit system would thus be an option. / Human Resource Management / M. Comm. (Business Management)

Syftet med studien var att utifrån professionellas kunskaper och unga vuxnas upplevelser undersöka hur bestämmelsen i 4 kap 4 § SoL används i praktiken samt om den möjliggör chansen till självförsörjning. Detta gjordes genom kvalitativa intervjuer med försörjningsstödshandläggare, vägledare och unga vuxna med anknytningar till undersökningsområdet. Studien är induktiv med ett hermeneutiskt förhållningssätt och materialet har analyserats med hjälp av Maslows behovshierarki, empowerment teori samt tidigare forskning. Resultatet visade på att en kompetenshöjande insats i slutändan ska leda till självförsörjning, men även utvecklar deltagarnas psykiska välbefinnande. Även om deltagandet i den kompetenshöjande verksamheten är ett krav för att få försörjningsstöd, har de unga vuxna en positiv upplevelse av verksamheten och vägledarna i motsats till tidigare forskning. Anledningen till det positiva resultatet tycks bero på det individuella stödet och utformningen. / The purpose of the study was that based on professionals' knowledge and experiences of young adults explore how the provision in chapter 4 § 4 SoL used in practice and whether it allows the chance to self-sufficiency .This was done through qualitative interviews with welfare benefits administrators, counselor , and young adults with connections to the subject .The study is inductive with a hermeneutic approach and the material has been analyzed using Maslow's hierarchy of needs , empowerment theory and previous research. The result showed that a competence-raising effort will ultimately lead to self-sufficiency, but also develops the participants' psychological well-being. Although participation in skill-enhancing activity is a requirement to receive welfare benefits, the young adults have a positive experience of the activities and counselors in contrast to previous research. The reason for the positive outcome seems to depend on the individual aid and the design.

The energy consumption of communication networks is continuously growing. Many energy saving approaches have been proposed at the device, system, and network level. The most promising way to address this problem is to utilize photonic technologies as much as possible thanks to their low energy consumption per bit performance. Moreover, several approaches have been proposed to further reduce the energy consumption in optical networks. One popular technique exploits low power modes (e.g., sleep or doze mode) for devices that are not used. However, sleep mode based approaches may affect the way optical connections (i.e., lightpaths) are routed, or alter the characteristics of some devices. This in turn may have a detrimental impact on crucial network/device performance parameters. In other words a green approach may introduce additional delay, change the level of resource utilization in the network, or even impact the lifetime of a device, resulting in increased network operational cost. This thesis provides a study that carefully assesses, in both access and core networks, the trade-off between the benefits of sleep-based energy-efficient schemes and their possible side-effects. In fiber access networks putting a device into sleep mode and waking it up can introduce a significant energy overhead. Already proposed energy-efficient approaches reduce this overhead by aggregating as much as possible the traffic before a transmission. However, aggregating data may cause an additional delay that in some cases might not be acceptable. This thesis investigates the trade-off between energy saving and additional packet delay in the case of a LTE backhaul network based on wavelength division multiplexing passive optical network (WDM-PON). The thesis proposes a novel energy-efficient approach based on the dozing concept able to precisely control when a transmitter needs to wake up in order to maximize the time spent in sleep mode, while assuring that packet transmissions are completed before a given deadline. The proposed scheme is also able to exploit possibly diverse traffic delay requirements to further improve energy saving performance. In optical core networks, one way to decrease the energy consumption is to minimize the number of used active devices by aggregating the lightpaths on the lowest possible number of active fiber links. Routing strategies based on this intuition are beneficial in terms of energy saving, but on the other hand may impact the network performance (e.g., blocking probability) by affecting length of the lightpaths and link occupancy distribution. This trade-off is evaluated in the thesis with the help of a specially designed routing and wavelength assignment (RWA) strategy referred to as weighted power aware lightpath routing (WPA-LR). The WPA-LR strategy permits the fine tuning between the minimization of two objectives: energy consumption and network resource (i.e., wavelength) utilization. Evaluation results confirm that energy efficiency and network performance are conflicting objectives. However, the proposed WPA-LR strategy offers energy minimization with acceptable impact on the network performance. The thesis also investigates the impact that sleep-based energy-efficient strategies have on the lifetime of a number of optical network devices, in both access and core networks. In fact, utilizing a sleep mode functionality may change the operational conditions of the device which can impact the device lifetime. This is a crucial aspect to consider because it may directly affect the network operational cost related to fault management. The thesis provides a methodology to assess under which conditions and for which devices an energy-efficient scheme may lead to overall cost benefit vs. a (possible) increase of reparation cost. It was found that in access networks and with business customers a small lifetime variation in optical line terminals (OLTs) or in optical network units (ONUs) can lead to significant cost increase that cannot be covered by the profits coming from the energy saving. In core networks erbium doped fiber amplifiers (EDFAs) are the most vulnerable devices in terms of impact on their lifetime. For this reason it was found that the usage of green routing algorithms based on putting EDFAs into sleep mode may not always be economically beneficial. In conclusion this thesis provides a different perspective on sleep mode based energy-efficient algorithms where the potential benefit in terms of energy saving is weighted against the impact of a possible degradation of the network performance and devices lifetime. On the other hand these performance degradations can be controlled and limited by the proposed algorithms. / Energikonsumtionen av kommunikationsnätverk, växer kontinuerligt. Många energibesparande åtgärder har föreslagits, såväl på komponentnivå, systemnivå och nätverksnivå. Det mest lovande sättet att hantera energibehov i kommunikationsnätverk är att utnyttja optisk teknologi så mycket som möjligt då denna har potential att ge låg energiförbrukning per bit. Det finns också ett antal föreslagna metoder för att ytterligare reducera energibehovet i optiska nätverk. En av de mest använda teknikerna bygger på att låta enheter som ej används gå ner på låg effekt (”sovläge”). Om detta används i allt för hög utsträckning kan det dock påverka hur optiska förbindelser (sk lightpaths) sätts upp eller ge förändrade egenskaper hos de aktuella komponenterna. Detta kan i sin tur ha en skadlig inverkan på de centrala nätverks- och komponentegenskaper vilket påverkar prestandan. Med andra ord kan en sådan ”grön” ansats baserad på sovläge leda till ökad fördröjning, förändring av resursutnyttjandet i nätet och till och med påverka risken för att det uppstår fel i komponenterna vilket ökar driftskostnaden för nätet. Denna avhandling fokuserar på dessa aspekter och visar upp resultat som belyser avvägningen mellan sovlägesbaserade energieffektiva strategier och deras eventuella bieffekter. Att slå av och väcka upp komponenter i optiska access-nätverk kan vara förknippat med en signifikant extra energikostnad. Tidigare föreslagna energieffektiva strategier försöker reducera denna ökade energikostnad genom att samla så mycket trafik som möjligt innan överföringen sker. Dock kan detta leda till ökad fördröjning som i vissa lägen inte är acceptabel. I avhandlingen undersöker vi avvägningen mellan energibesparingar och ökad paketfördröjning i fallet med LTE distributionsnät baserade på våglängsmultiplexerade passiva optiska nätverk (WDM-PON). Vi föreslår en ny energieffektiv ansats baserad på att enheter försätts i ”slummer-läge”. Detta gör det möjligt att med god precision bestämma när en sändare behöver väckas upp i syfte att maximera tiden i sovläget och att försäkra sig om att paketen kommer fram inom avsedd tid. Strategin är även kapabel att utnyttja differentierad fördröjning för att ytterligare förbättra energibesparingen. Ett sätt att minska energikonsumtionen i optiska distributionsnät är att minimera antalet aktiva enheter genom att exempelvis samla optiska förbindelser till ett minimalt antal aktiva fiberlänkar. Routingstrategier som utgår från denna princip är fördelaktiga ur energisynpunkt men kan å andra sidan skada nätverksprestanda (exempelvis blockeringssannolikhet) genom påverkan på förbindelselängder och annorlunda belastning av länkarna. Denna avvägning utvärderas i avhandlingen med hjälp av en specifikt utformad strategi för routing och våglängstilldelning (RWA) som vi benämner ”viktad effektmedveten optisk förbindelserouting” (WPA-LR). Denna strategi möjliggör noggrann avvägning mellan minimeringen av två kriterier: å ena sidan energikonsumtion, å andra sidan utnyttjandet av nätverksresurser (speciellt väglängdsutnyttjandet). Vår utvärdering bekräftar att energieffektivitet och nätverksprestanda står i motsatsförhållande till varandra. Dock erbjuder WPA-LR strategin minimering av energin med en acceptabel påverkan på nätverksprestanda. Slutligen undersöks i avhandlingen den påverkan som sovlägesbaserade energieffektiva strategier har på livslängden för optiska nätverkskomponenter, både i access- och i distributionsnät. Användning av sovlägesfunktion kan påverka arbetsförhållandena för en komponent, något som i sin tur kan påverka livslängden. Detta är en kritisk aspekt att ta i beaktande då det direkt kan påverka driftskostnaden kopplad till nätunderhållet. En metod ges för att utvärdera under vilka förhållanden och för vilka enheter en energieffektiv strategi kan leda till en total kostnadsfördel jämfört med en (möjlig) ökning av reparationskostnaderna. Ett resultat är att, i accessnät och för företagsanvändare, så kan även en liten variation i feluppkomst i optiska linjeterminaler (OLTs) eller optiska nätverksenheter (ONUs) leda till signifikanta kostnadsförluster vilka inte kan kompenseras genom de vinster som kan åstadkommas med energibesparingar. I distributionsnät är erbium-dopade fiberförstärkare (EDFAs) de mest utsatta enheterna vad gäller inverkan på livslängd. Genom att studera routingstrategier (ex.vis WPA-LR) har vi funnit att användningen av ”gröna” routingalgoritmer baserade på att lägga EDFAs i sovläge inte alltid är ekonomiskt fördelaktigt. Denna avhandling ger ett perspektiv på sovlägesbaserade energieffektiviseringsalgoritmer där de potentiella fördelarna vad gäller minskade driftskostnader ställs mot möjliga försämringar av nätverksprestanda och komponenters livslängd. Å andra sidan kan dessa försämringar hållas under kontroll och begränsas av den föreslagna algoritmen. / La consommation d'énergie des réseaux de communication ne cesse de croître. Ce problème fait l’objet de nombreuses approches orientées vers les économies d'énergie (écoénergétiques) au niveau des appareils (équipements) des systèmes et des réseaux. La façon la plus prometteuse de limiter l’augmentation de consommation évoquée est d'utiliser autant que possible des technologies photoniques, vu leur faible consommation d'énergie par bit. Plusieurs autres approches ont été proposées pour réduire davantage encore la consommation d'énergie dans des réseaux optiques. Une technique populaire exploite les modes de faible puissance (par exemple le mode veille) pour les appareils qui ne sont pas utilisés. Cependant, les approches basées sur le mode de veille peuvent affecter la manière dont les liaisons optiques (circuits optiques) sont acheminées, ou modifier les caractéristiques de certains appareils. Cela peut avoir un impact négatif sur les paramètres de performance des réseaux/équipements cruciaux. En d'autres termes, une approche écoénergétique peut introduire un retard supplémentaire, changer le niveau d'utilisation des ressources dans le réseau, ou même avoir un impact sur le taux d'échec d'un équipement, entraînant une augmentation des coûts d'exploitation du réseau. Cette thèse évalue attentivement, à la fois dans le réseau d'accès mais aussi dans le cœur du réseau, le compromis entre les avantages des régimes économes en énergie utilisant le mode veille et leurs effets secondaires possibles. Dans les réseaux d'accès optiques, mettre un équipement en mode veille et le réactiver peut introduire une surcharge d'énergie significative. Les approches d'économie d'énergie déjà proposées réduisent cette surcharge en regroupant autant que possible le trafic avant sa transmission. Toutefois, les données d'agrégation peuvent provoquer un retard supplémentaire qui peut ne pas être acceptable dans certains cas. Cette thèse étudie le compromis entre les économies d'énergie et un retard supplémentaire des paquets dans le cas d'un réseau backhaul LTE basé sur réseau optique passif à multiplexage en longueur d'onde (WDM-PON). La thèse propose une nouvelle approche éco énergétique. Elle développe un concept au travers duquel il est possible de contrôler avec précision quand un émetteur doit se réactiver, afin de maximiser le temps passé en mode veille tout en veillant à ce que les transmissions de paquets soient terminées en temps voulu. Le schéma proposé est également capable d’exploiter les (éventuelles) exigences diverses de retard de trafic pour améliorer encore les économies d'énergie. Dans le cœur des réseaux optiques, on peut diminuer la consommation d'énergie en minimisant le nombre d’équipements actifs utilisés pour l’acheminement des circuits optiques et le nombre de liens actifs à fibres optiques. Les stratégies de routage basées sur ce principe sont bénéfiques en termes d'économie d'énergie, mais peuvent affecter les performances du réseau (par exemple, la probabilité de blocage) en affectant la longueur des circuits optiques et la distribution d’occupation des liens. Ce compromis est évalué dans la thèse avec l'aide d’une stratégie de routage et affectation de longueur d'onde (RWA) appelée routage des circuits optiques conscient de la puissance (WPA-LR). La stratégie WPA-LR permet le réglage fin entre deux objectifs: minimiser la consommation d'énergie et minimiser l’utilisation des ressources réseau (i.e. longueur d'onde). Les résultats de l'évaluation confirment que l'efficacité énergétique et les performances du réseau ont des objectifs contradictoires. Cependant, la stratégie WPA-LR proposée permet la minimisation de l'énergie avec un impact acceptable sur les performances du réseau. La thèse étudie également l'impact que les stratégies d’économie d’énergie basées sur le mode veille ont sur la durée de vie d'un certain nombre d’équipements de réseau optique, dans les deux réseaux d'accès et de base. L'utilisation du mode veille peut en effet modifier les conditions de fonctionnement de l’équipement, ce qui peut influer sur la durée de vie de l'appareil. Ceci est un aspect crucial à considérer, car il peut affecter directement le coût opérationnel du réseau lié à la gestion des pannes. La thèse propose une méthodologie pour évaluer dans quelles conditions et pour quels dispositifs un système économe en énergie peut conduire à des avantages de coûts globaux par rapport à une (possible) augmentation des coûts de maintenance. Dans les réseaux d'accès et auprès de clients commerciaux, il a été constaté qu’une petite variation de taux d'échec dans les terminaux de ligne optique (OLT) ou dans les unités de terminaison de réseau optique (ONUs) peut conduire à des pertes financières importantes qui ne peuvent être compensées par les bénéfices provenant des économies d'énergie. Dans les cœurs de réseaux les amplificateurs à fibre dopée en erbium (EDFA) sont les équipements les plus vulnérables en termes d'impact sur leur durée de vie. Pour cette raison, l'utilisation d'algorithmes de routage écoénergétiques basé sur la mise en mode veille des EDFA peut par conséquent n’être pas toujours économiquement avantageuse. En conclusion, cette thèse fournit une perspective différente sur des algorithmes économes en énergie basés sur l’utilisation du mode veille. Leur bénéfice potentiel en termes d'économie d'énergie est comparé à l'impact d'une éventuelle dégradation d’une part de la performance du réseau et d’autre part de la durée de vie des équipements. Ces dégradations de performances peuvent être contrôlées et limitées par les algorithmes proposés. / Zużycie energii elektrycznej w sieciach komunikacyjnych stale rośnie. Do tej pory zostało zaproponowanych wiele metod oszczędzania energii na poziomie urządzeń, systemów i sieci. Najbardziej obiecującym podejściem do tego problemu jest wykorzystanie technologii optycznych, z uwagi na ich niskie zużycie energii „per bit”. Ponadto wiele różnych metod przeznaczonych dla sieci optycznych zostało przedstawionych w literaturze. Jedna z popularnych technik wykorzystuje tryb niskiego poboru energii (uśpienia) w urządzeniach, które nie są używane. Jednakże techniki wykorzystujące tryb uśpienia mogą mieć wpływ na kierowanie optycznych połączeń sieciowych (lightpaths) lub zmieniać właściwości urządzeń. Natomiast to może mieć negatywny wpływ na kluczowe parametry wydajności sieci czy urządzeń sieciowych. Innymi słowy algorytmy oszczędzające energię mogą wprowadzić dodatkowe opóźnienia, zmienić wykorzystanie zasobów sieciowych, a nawet wpływać na awaryjność urządzeń zwiekszając tym samym koszt eksploatacji sieci. Praca ta przedstawia i analizuje kompromis pomiędzy korzyściami płynącymi z energooszczędnych algorytmów opartych na trybie uśpienia, a ich ewentualnymi skutkami ubocznymi, zarówno w sieciach dostępowych, jak i szkieletowych. W przypadku optycznych sieci dostępowych proces wprowadzenia urządzenia w tryb uśpienia i jego wybudzenia może spowodować znaczący narzut energetyczny. Proponowane sposoby zmniejszenia tego narzutu agregują ruch sieciowy przed jego transmisją, Jednakże taka agregacja powoduje dodatkowe opóźnienia transmisji, które w niektórych przypadkach mogą być niedopuszczalne. Praca ta analizuje kompromis pomiędzy oszczędzaniem energii, a dodatkowymi opóźnieniami transmisji w przypadku sieci LTE-backhaul, bazowanej na technologii pasywnych sieci optycznych, opartych na multipleksowaniu z podziałem długości fali WDM-PON (Wavelength Division Multiplexing Passive Optical Network). Niniejsza praca proponuje nowatorską metodę oszczędzania energii, opartą na koncepcji drzemki (dozing), która precyzyjnie kontroluje czas wybudzania nadajnika, tak aby zmaksymalizować czas spędzony w trybie drzemki, przy zapewnieniu, że transmisja danych zostanie zakończona przed upływem wymaganego czasu. Proponowana metoda wykorzystuje również zróżnicowane wymagania maksymalnych opóźnień transmitowanych danych do dalszej poprawy wydajności energetycznej. Jednym ze sposobów zmniejszania zużycia energii w światłowodowych sieciach szkieletowych jest zredukowanie liczby aktywnych urządzeń, poprzez umiejętne kierowanie optycznych połączeń sieciowych przy użyciu już aktywnych łączy światłowodowych. Kierowanie ruchu sieciowego oparte na tym pomyśle jest korzystne z punktu widzenia oszczędzania energii, choć z drugiej strony może mieć wpływ na parametry wydajnościowe sieci (np. zwiększenie prawdopodobieństwa blokady połączeń) poprzez oddziaływanie na długość połączeń, czy zajętość łączy. Przytoczony problem jest analizowany w tej pracy za pomocą specjalnie zaprojektowanego algorytmu routingu i przypisania długości fali RWA (Routing and Wavelength Assignement), nazwanego WPA-LR (Weighted Power Aware Lightpath Routing). Algorytm WPA-LR pozwala na precyzyjną regulację pomiędzy redukcją zużycia energii i optymalizacją wykorzystania zasobów sieciowych. Wyniki wykonanej analizy problemu potwierdzają, że efektywność energetyczna i wydajność sieci to cele ze sobą sprzeczne. Jednakże proponowana strategia (WPA-LR) umożliwia kontrolę i osiągnięcie kompromisu pomiędzy zmniejszeniem zużycia energii, a pogorszeniem wydajności sieci. Praca ta bada również wpływ energooszczędnych strategii, opartych o tryb uśpienia, na trwałość optycznych urządzeń sieciowych, zarówno w sieciach dostępowych, jak i szkieletowych. Używanie trybu uśpienia może zmienić warunki pracy urządzenia, które z kolei mogą mieć wpływ na jego trwałość. Natomiast zmniejszenie trwałości urządzenia może bezpośrednio oddziaływać na koszt eksploatacji sieci związany z zarządzaniem awariami. Niniejsza praca proponuje metodologię oceny, na jakich warunkach i w przypadku których urządzeń, używanie algorytmów oszczędzania energii może prowadzić do ogólnych korzyści finansowych lub strat związanych ze wzrostem kosztu eksploatacji sieci. W pracy stwierdzono, że w sieciach dostępowych, w szczególności obsługujących klientów biznesowych, mały wpływ na awaryjność optycznych terminali ONU (Optical Network Unit) lub optycznych urządzeń dystrybucyjnych OLT (Optical Line Terminal) może prowadzić do znacznego zwiększenia kosztów, które mogą przekroczyć zyski związane z oszczędzaniem energii. W sieciach szkieletowych wzmacniacze światłowodowe EDFA (Erbium Doped Fiber Amplifier) są najbardziej wrażliwymi urządzeniami pod względem wpływu na ich awaryjność. W pracy dowiedziono, że użycie energooszczędnych algorytmów kierowania połączeń światłowodowych, opartych na wprowadzaniu EDFA w tryb uśpienia, nie zawsze jest korzystne ekonomicznie. Niniejsza praca przedstawia nowatorskie spojrzenie na energooszczędne algorytmy oparte na wprowadzaniu urządzeń w tryb uśpienia, gdzie potencjalne korzyści w zakresie oszczędzania energii są porównane ze stratami związanymi z degradacją wydajności sieci lub żywotności urządzeń sieciowych. / <p>QC 20160509</p>

The present thesis aims to investigate students’ willingness to share customer data in the fashion e-commerce. Special attention is given to the way trust, benefits and law regulations are discussed in this context. An inductive approach was applied utilizing focus group discussions. The goal of the empirical study was to gain insights in the way students argue about customer data and which feelings are involved. The study highlights findings in the key areas trust, benefits and law regulations. A shift of customer trust from brands to recommendations could be observed. In terms of benefits, focus group participants tend to choose value exchange over traditional rewards. Findings regarding law regulations suggest that the General Data Protection Regulation of the European Union can provide control of customer data but no security. Furthermore, consumer behavior plays an important role when it comes to data sharing attitudes. The experiences and observations of the participants may not be applicable to other studies. Furthermore, the study findings are bounded to the European Union. The findings suggest that trust, benefits and law regulations can influence students’ willingness to share customer data in the fashion e-commerce. The study is unique of its kind as it investigates the willingness to share customer data with the focus on students and fashion e-commerce. Hence, this research paper fills a gap in scientific literature and is valuable for businesses operating in the fashion e-commerce.

This thesis investigates the Out-of-Box Experience (OoBE) of interactive consumer products for older adults, with a view to improve the User Experience (UX) of a product by manipulating factors of the OoBE. This research emerges in the context of current demographic trends, which see people living longer and in better health, and the increasing ubiquity of technology in modern life. The OoBE describes the very first stages of interaction with a new product, including acquisition, unpacking and setup. This crucial initial experience has the potential to influence product acceptance and therefore determine its future use. Creating a positive OoBE requires an empathic understanding of the intended users, as well as contextual knowledge about current practices. A review of the literature revealed that many of the difficulties older adults experience with technology concern elements of the OoBE, such as complicated documentation, technical jargon and inadequate support for inexperienced users. However, the absence of research on how to engage older adults during the OoBE of new technology reinforced the need for further research. To this end, two user studies were conducted with older people, followed by a design study with designers. The first study explored older adults relationship with technology and their current practices of the OoBE, using the Technology Biography method. The second study used cultural probes to investigate the social side of UX and its effect on personal feelings of independence. Data from these two studies were used to create four personas, which were used in the design study. This third and final study focused on whether the construct of social benefits could be operationalised within the OoBE of new technology. Collectively, the findings indicated that the involvement of other people during the OoBE can be a strong motivator for older people to take up and use technology. Far from impinging on individual perceptions of independence, some older people actively manipulate the OoBE in order to derive social benefits. This research thus contributes to the discussion of how Inclusive Design can evolve through the incorporation of social benefits, in order to generate desirable and successful future products.

The current application of logistics in the construction industry is relatively inefficient when compared with other industries such as retail and manufacturing. The factors attributed to this inefficiency include the fragmented and short-term nature of construction process and inadequate tracking facilities on site. The inefficiency of construction logistics creates inter alia loss of materials and equipment, waste, construction delay, excessive cost and collision accident on site. Meanwhile, several information and communication technologies (ICT) have been proposed and developed by researchers to improve logistics functions such as tracking and monitoring of resources through the supply chain to the construction site. Such technologies include global positioning system (GPS), radio frequency identification devices (RFID), wireless sensors network (WSN) and geographical information system (GIS). While considerable research has been undertaken to develop the aforementioned systems, limited work has so far been done on investment justification prior to implementation. In this research, a framework has been developed to assess the extent of construction logistics problems, measure the significances of the problems, match the problems with existing ICT-based solutions and develop a robust ready-to-use multi-criteria analysis tool that can quantify the costs and benefits of implementing several ICT-based construction logistics systems. The tool is an integrated platform of related evaluation techniques such as Fault Tree Analysis, Decision Tree Analysis, Life Cycle Cost Analysis and Multi-Attribute Utility Theory. Prior to the development of this tool, data was collected through questionnaire survey and analysed by means of statistical analysis in order to derive some foundational parameters of the tool. Quantitative research method was adopted for data collection because the processes of the tool for which the data was required are quantitative. The implementation of this tool is novel given the integration of the analytical techniques mentioned above and the application of the tool for selecting ICT-based construction logistics systems. The tool takes in data such as cost and quantities of materials for a building project and quantifies the cost and benefits of alternative ICT-based tracking systems that can improve the logistics functions of the project. The application of the tool will eliminate guesswork on the benefits of ICT-based tracking systems by providing an objective platform for the quantification of cost and benefits of the systems prior to implementation.

published_or_final_version / Business Administration / Master / Master of Business Administration