O objetivo do trabalho foi sensibilizar moradores e alunos de uma comunidade piloto quanto à correta separação, destinação e valorização dos resíduos sólidos, visando à melhoria nas condições de trabalho e de renda dos catadores de materiais recicláveis da central de triagem. A metodologia principal foi a pesquisa ação, que envolveu três etapas: fase exploratória, de ação e de avaliação. Para embasamento das ações de sensibilização, a fase exploratória contou, primeiramente, com o estudo da dinâmica de trabalho em uma central de triagem. Tal estudo se justifica pelo fato de que uma central de triagem é o elo principal entre a fonte geradora de resíduos sólidos e as indústrias recicladoras. Além disso, foi realizado diagnóstico da percepção de moradores e alunos sobre a separação e a valorização dos resíduos sólidos, em uma um bairro piloto, alvo das ações de sensibilização. Na fase de avaliação, novo estudo do entendimento da comunidade piloto foi feito para compreender se a sensibilização trouxe mudanças de percepção e se houve algum tipo de interferência nos gargalos diagnosticados na central de triagem. Os principais resultados apontaram as etapas de triagem e do rejeito como gargalos, as quais sofrem interferência da segregação nas fontes geradoras e da deficiência dos sistemas de logística reversa para escoamento dos resíduos. As ações de sensibilização com alunos e moradores resultaram em aprimoramento da percepção quanto à importância do envio de materiais limpos e secos à coleta seletiva; ao conhecimento de uma associação de catadores e à importância de destinar resíduos especiais, como lâmpadas fluorescentes, às revendas, diminuindo a recepção de resíduos perigosos na central de triagem. Os resultados servirão para embasar as discussões com a cadeia produtiva visando ao escoamento sustentável dos resíduos, e as ações já foram replicadas no município em toda a rede municipal e estadual de ensino, e em residências atendidas pelo programa das agentes comunitárias de saúde. / The objective of this work was to sensitize residents and students in a pilot community for proper separation, disposal and recovery of solid waste in order to improve working conditions and income of recyclable materials collectors from a sorting center. The main methodology was action research, which involved three stages: exploratory, action and evaluation. The working dynamics study in a sorting center based sensitization actions, in exploratory stage. The main link between the source of solid waste and recycling industries is a sorting center that is why this study is important. Moreover, perception diagnosis of separation and recycling of solid waste was made with residents and students in a pilot neighborhood. New study was done in the evaluation phase to find perception changes and to know if sensitization actions interfered in the sorting center bottlenecks diagnosed. The main results showed that steps of sorting and tailings are bottlenecks, suffering interference from domiciliary segregation and deficiency of reverse logistics systems for waste disposal. Sensitization actions with students and residents improved the perception of sending clean and dry recyclable materials to selective collection. Also improved the knowledge of an association of recyclable material collectors and the importance of devoting hazardous wastes such as fluorescent lamps, to resellers, decreasing the receipt of this kind of waste at the sorting center. The results will be used to support discussions with the producers chain toward sustainable waste disposal. Actions have already been replicated in the city throughout municipal and state schools, and homes served by the program of community health workers.

Summary in English, Afrikaans and Zulu / The natural environment is important for human existence and the ubiquity of Information Technology (IT) has negatively impacted on the natural environment. Green IT offers to address these negative effects. However, since Green IT practices are often not common knowledge, it is vital that they are taught to others. Teachers typically have the skills and opportunities to teach many people. The research problem was the lack of research focusing on the teaching of Green IT in the context of the urgent need for it and teachers’ limited knowledge and competencies relating to Green IT. The study employed a survey research strategy, involving exploratory factor analysis, ANOVA and structural equation modeling (SEM). The main findings indicate that allocating time and resources to improve student teachers’ level of awareness, perceived behavioural control and person-related beliefs would positively influence their intention to teach Green IT, and, in turn, their Green IT teaching. / Die natuurlike omgewing, wat so noodsaaklik is vir menslike voortbestaan, word negatief beïnvloed deur die alomteenwoordigheid van inligtingstegnologie. Groen IT-praktyke kan gebruik word om sodanige negatiewe effekte in te perk, maar aangesien die nodige kennis nie alombekend is nie, moet dit aan ander oorgedra word. Onderwysers het beide die vaardighede en die geleenthede om inligting aan groot groepe mense oor te dra. In dié geval was die navorsingsprobleem ‘n gebrek aan studies wat fokus op die dringende noodsaaklikheid van Groen IT-onderrig, asook onderwysers se beperkte verwante kennis en vaardighede. ‘n Opname is gebruik as navorsingstrategie, met eksploratiewe faktorontleding, variansie-ontleding (ANOVA) en strukturele vergelykingsmodellering (SVM). Ingevolge die hoofbevindinge sal die beskikbaarmaak van tyd en hulpbronne leerlingonderwysers se bewuswordingsvlakke verbeter, sowel as hul waarneembare gedragswetenskaplike beheer en hul persoonsverwante beskouinge, en ‘n positiewe uitwerking hê op hul voorneme om Groen IT te onderrig, wat weer op sy beurt hul Groen IT-onderrig sal bevoordeel. / Imvelo yemvelo ibalulekile ekubeni khona komuntu nokutholakala kobuchwepheshe bezokwazisa kuye kwaba nomthelela omubi emvelweni yemvelo. Ubuchwepheshe bezokwazisa obuluhlaza bunikeza izindlela zokubhekana nemiphumela emibi. Kodwa-ke, njengoba imikhuba yobuchwepheshe bezokwazisa obuluhlaza ayivamile ukuba ulwazi iv oluvamile, kubalulekile ukuthi ifundiswe kwabanye. Othisha sidalo sabo banawo amakhono namathuba ukufundisa abantu abaningi. Inkinga yocwaningo ukuntuleka kocwaningo okugxila ekufundiseni kobuchwepheshe bezokwazisa obuluhlaza esimweni sesidingo esiphuthumayo sabo, nolwazi olulinganiselwe lothisha kanye namakhono afanelekayo kubuchwepheshe bezokwazisa obuluhlaza. Isu lokucwaninga ucwaningo lwasetshenziswa, okubandakanya ukuhlaziywa kwesici sokuhlola, ANOVA kanye nokuhlelwa kwesifaniselo esiyisilinganiso (SEM). Ukutholwa okusemqoka kubonisa ukuthi ukwabela isikhathi kanye nezinsiza zokuthuthukisa abafundi othisha izinga lokuqwashisa, ukulawula kokuziphatha okubonwayo kanye nezinkolelo ezihlobene nomuntu zizoshukumisa kahle izinhloso zabo ukufundisa ubuchwepheshe bezokwazisa obuluhlaza futhi nemfundiso yabo yobuchwepheshe bezokwazisa obuluhlaza. / University of South Africa / School of Computing / M. Sc. (Computing)

Indiana University-Purdue University Indianapolis (IUPUI) / One of the most common goals of a wireless sensor network is to collect sensor data. The goal of this thesis is to provide an easy to use and energy-e fficient system for deploying data collection sensor networks. There are numerous challenges associated with deploying a wireless sensor network for collection of sensor data; among these challenges are reducing energy consumption and the fact that users interested in collecting data may not be familiar with software design. This thesis presents a complete system, comprised of the Compression Data-stream Protocol and a general gateway for data collection in wireless sensor networks, which attempts to provide an easy to use, energy efficient and complete system for data collection in sensor networks. The Compressed Data-stream Protocol is a transport layer compression protocol with a primary goal, in this work, to reduce energy consumption. Energy consumption of the radio in wireless sensor network nodes is expensive and the Com-pressed Data-stream Protocol has been shown in simulations to reduce energy used on transmission and reception by around 26%. The general gateway has been designed in such a way as to make customization simple without requiring vast knowledge of sensor networks and software development. This, along with the modular nature of the Compressed Data-stream Protocol, enables the creation of an easy to deploy and easy to configure sensor network for data collection. Findings show that individual components work well and that the system as a whole performs without errors. This system, the components of which will eventually be released as open source, provides a platform for researchers purely interested in the data gathered to deploy a sensor network without being restricted to specific vendors of hardware.

Abstracts in English, Afrikaans and Xhosa / Green information and communication technology (ICT) is viewed as a pioneering initiative that plays a key role in reducing the negative impact of ICT on the environment. The research problem of the study was the low green ICT adoption rate in South African small and medium enterprises (SMEs). The primary objective was to identify the most prominent barriers resulting in this low adoption rate. The first secondary objective was to determine the barrier with the strongest underlying correlation resulting in the low adoption rate of green ICT in South African SMEs. The second secondary objective was to recommend strategies on how to improve the adoption rate of green ICT. A self-administered questionnaire was used to collect data through electronic and paper-based surveys. A census study was conducted among owners and managers of high-technology-based SMEs located in Gauteng. An exploratory factor analysis was employed to identify the barriers resulting in the low adoption rate of green ICT. These barriers were found to be a lack of funding, awareness, legislation, skills, and knowledge based on complexity and uncertainty. A lack of funding was identified as the most prominent barrier to adopting low green ICT. Although five constructs were discussed in the literature, the overall results presented six components, with the construct of knowledge being made up of two parts – complexity and uncertainty. This study recommends that SMEs align green ICT initiatives with their strategic goals and that government consider more adequate support structures for SMEs. The study confirmed a low green ICT adoption rate in South African SMEs, and more research is required to explore the impact of each of the factors above on the environment. / Met groen inligting-en-kommunikasietegnologie (IKT) word baanbrekerswerk gedoen om die nadelige uitwerking wat IKT op die omgewing het, te verklein. Die trae tempo waarteen Suid-Afrikaanse klein en medium ondernemings (KMO’s) groen IKT aanneem was die navorsingsprobleem van hierdie studie. Die primêre oogmerk was om die grootste struikelblokke vir die aanneem van groen IKT aan te toon. Die eerste sekondêre oogmerk was om die struikelblok met die sterkste onderliggende korrelasie met die trae tempo waarteen Suid-Afrikaanse KMO’s groen IKT aanneem, te bepaal. Die tweede was om met strategieë te kom om die tempo te versnel waarteen groen ITK aangeneem word. Data is met ʼn selfvraelys deur elektroniese en papieropnames versamel. ʼn Sensusstudie is onder die eienaars en bestuurders van hoëtegnologie-KMO’s in Gauteng gedoen. Struikelblokke wat vir die trae aanneming van groen ITK verantwoordelik is, is met ʼn verkennende faktoranalise aangetoon. Daar is bevind dat gebrekkige befondsing en bewustheid, wetgewing, ʼn gebrek aan vaardighede en kennis weens die kompleksiteit en onsekerheid struikelblokke is. ʼn Gebrek aan befondsing was die grootste struikelblok vir die aanneem van groen IKT. Hoewel vyf konstrukte in die literatuur bespreek is, het die uitslag aangedui daar is ses. Die konstruk kennis is uit twee dele saamgestel: kompleksiteit en onsekerheid. Hierdie studie beveel aan dat KMO’s hulle groen IKT-inisiatiewe met hulle strategiese doelwitte in ooreenstemming bring, en dat die regering KMO’s beter ondersteun. Die studie bevestig die trae tempo waarteen Suid-Afrikaanse KMO’s groen ITK aanneem. Die invloed van elk van die bogenoemde faktore op die omgewing moet in verdere navorsing verken word. / Ulwazi lwezeMvelo kanye nobuchwepheshe bezokuxhumana (ICT) kuphawuleka njengemizamo yamaqhinga amasha adlala indima esemqoka ekunciphiseni umthelela omubi we-ICT kwezemvelo. Inkinga exazululwayo kucwaningo kwabe kuyizinga eliphansi lomthintela we-ICT kwezemvelo kumabhizinisi amancane nalawo asafufusa (SMEs) eNingizimu Afrika. Inhloso yokuqala kwabe kuwukuthola izikhinyabezo ezigqamile eziholela ekutheni kube nezinga eliphansi lokwamukela ezemvelo. Inhloso yokuqala esesigabeni sesibili kwabe kuwukuthola isikhinyabezo esinezimpawu ezihambisanayo kakhulu esidala izinga eliphansi lokwamukela ezemvelo kwi-ICT. Inhloso yesibili yesigaba sesibili kwabe kuwukuncoma amasu angasetshenziswa ukuthuthukisa izinga lokwamukelwa kwezemvelo kwi-ICT. Umbhalo wemibuzo ehlelwe wumcwaningi ngokwakhe wasetshenziswa ukuqoqa idatha ngohlelo lwesaveyi eyaqhutshwa ngekhomphyutha nangephepha. Ucwaningo lohlelo lokubalwa kwabantu/lwesensasi lwenziwa phakathi kwabanikazi kanye nabaphathi bamabhizinisi amancane nasafufusa esifundazweni saseGauteng, amabhizinisi encike kubuchwepheshe beqophelo eliphezulu. Uhlelo lokuhlaziya oluhlolayo lwasetshenziswa ngesizathu sokuthola izihibhe ezidala izinga eliphansi lokulandelwa kwezemvelo ku-ICT. Lezi zihibhe zatholakala ukuthi ukuswela uxhaso lwezimali, ukwexwayiswa, umthetho, izakhono zomsebenzi kanye nolwazi olwencike phezu kwesimo esixubene kanye nokungabi nesiqinisekiso. Ukuswela ukuxhaswa ngezimali kwabonakala njengesikhinyabezo esikhulu mayelana nokwamukelwa kwezinga eliphansi lwe-ICT yezemvelo. Yize kuye kwaxoxwa ngezakhiwo ezinhlanu kumbhalo wobuciko, yonke imiphumela iveze izigaba eziyisithupha, ngesakhiwo solwazi esahlukene izingcezu ezimbili – isimo esixubene kanye kanye nokungabi nasiqinisekiso. Ucwaningo luncoma ukuthi amabhizinisi amancane nasafufusa (SMEs) ahambisana nemizamo yohlelo lwe-ICT olulandela ezemvelo kanye nezimpokophelo zamasu kanye nokuthi uhulumeni ubhekelele ukuthi kube nezakhiwo eziningi nezanele zokuxhasa amabhizinisi amancane nasafufusa (SMEs). Ucwaningo luqinisekisile ukuthi kunezinga eliphansi lokubhekelelwa amabhizinisi amancane nasafufusa mayelana nezemvelo kwi-ICT eNingizimu Afrika, kanti kudingeka ucwaningo oluningi ukuhlola umthintela wazo zonke izinto ezingenhla mayelana nezemvelo. / Business Management / M. Com. (Business Management)