Virtual currencies and mobile banking are technology advancements that are receiving increased attention in the global community because of their accessibility, convenience and speed. However, this popularity comes with growing security concerns, like increasing frequency of identity theft, leading to bigger problems which put user anonymity at risk. One possible solution for these problems is using cryptography to enhance security of Bitcoin or other decentralised digital currency systems and to decrease frequency of attacks on either communication channels or system storage. This report outlines various methods and solutions targeting these issues and aims to understand their effectiveness. It also describes Secure Bitcoin Wallet, standard Bitcoin transactions client, enhanced with various security features and services.

Online adolescent friendships and social networking among adolescents are current phenomena that have emerged, and exploded, as part of the digital age and the vast development of communication technologies. The primary aim of this study was to gain knowledge and understanding regarding the nature and quality of online friendships and social networking among adolescents. A sequential explanatory mixed method design, was put to use for the purpose of this study. The quantitative data was collected first in the form of a short survey, by utilising a self-developed questionnaire to obtain a general overview of the social network practices and the forming and maintaining of online friendships among adolescents. Twenty five participants took part in the survey. This study was followed by a qualitative study in the form of interviews, to clarify, elaborate and explain the quantitative findings. Five information rich participants were interviewed. The findings of the empirical investigation revealed that adolescents, being part of the Net Generation, base their concept of socialising with friends on digital and communication technology, especially cell phones. They are connected to their friends 24 hours a day. The sense of safety and support they experience through this constant connectedness strengthens their self-esteem, self-confidence and self-worth and contributes to their identity formation. It is therefore recommended that parents and educators should accept that adolescents live in a virtual world and their new way of socialising, needs to be acknowledged. Parents and educators should adjust accordingly, by getting educated in this field themselves. The Net Generation is a generation who focuses on relationships and collaboration through technology and this should be exploited by anybody who has contact or interacts with the adolescent of today. / Psychology of Education / M. Ed. (Guidance and Counselling)

How do young adult students communicate through their smartphones today? Which applications and features do they choose? What motivates their choices for the various possible situations? In this paper we investigate which communication channels young adult students in Sweden use for private message communication in their smartphones, in what way they use the channels and why they choose specific channels for different types of communication. In Sweden today, there are numerous of different ways of communicate through smartphones. We have interviewed ten Swedish young adult students regarding their use. The results speaks for that SMS has proven to still be used very frequently, even though it has existed for many years and that there are plenty of other ways to communicate through private messages today. Social media, primarily Facebook, also attracts users to communicate through private messages with their smartphones. SMS isn’t any longer the obvious method for sending a message. By presenting the result of our study, we hope to provide for future design resolutions and to give the next generation of smartphones communication tools that are as optimal as possible.

Online adolescent friendships and social networking among adolescents are current phenomena that have emerged, and exploded, as part of the digital age and the vast development of communication technologies. The primary aim of this study was to gain knowledge and understanding regarding the nature and quality of online friendships and social networking among adolescents. A sequential explanatory mixed method design, was put to use for the purpose of this study. The quantitative data was collected first in the form of a short survey, by utilising a self-developed questionnaire to obtain a general overview of the social network practices and the forming and maintaining of online friendships among adolescents. Twenty five participants took part in the survey. This study was followed by a qualitative study in the form of interviews, to clarify, elaborate and explain the quantitative findings. Five information rich participants were interviewed. The findings of the empirical investigation revealed that adolescents, being part of the Net Generation, base their concept of socialising with friends on digital and communication technology, especially cell phones. They are connected to their friends 24 hours a day. The sense of safety and support they experience through this constant connectedness strengthens their self-esteem, self-confidence and self-worth and contributes to their identity formation. It is therefore recommended that parents and educators should accept that adolescents live in a virtual world and their new way of socialising, needs to be acknowledged. Parents and educators should adjust accordingly, by getting educated in this field themselves. The Net Generation is a generation who focuses on relationships and collaboration through technology and this should be exploited by anybody who has contact or interacts with the adolescent of today. / Psychology of Education / M. Ed. (Guidance and Counselling)

Indiana University-Purdue University Indianapolis (IUPUI) / In today's internet world with such a high traffic, it becomes inevitable to have multiple servers representing a single logical server to share enormous load. A very common network configuration consists of multiple servers behind a load balancer. The load balancer determines which server would service a clients request or incoming load from the client. Such a hardware is expensive, runs a fixed policy or algorithm and is a single point of failure. In this paper, we will implement and analyze an alternative load balancing architecture using OpenFlow. This architecture acquires flexibility in policy, costs less and has the potential to be more robust. This paper also discusses potential usage of OpenFlow based load balancing for media gateway selection in SIP-PSTN networks to improve VoIP performance.

Gemeinsamer Workshop von Universitaetsrechenzentrum und Professur Rechnernetze und verteilte Systeme (Fakultaet fuer Informatik) der TU Chemnitz. Workshop-Thema: Infrastruktur der ¨Digitalen Universitaet¨

Gemeinsamer Workshop von Universitaetsrechenzentrum und Professur Rechnernetze und verteilte Systeme (Fakultaet fuer Informatik) der TU Chemnitz. Workshop-Thema: Infrastruktur der ¨Digitalen Universitaet¨

Abstracts in English, Zulu and Setswana / This study investigated the feasibility of using WhatsApp Messenger as a tool to enhance the professional identity and inquiry-based pedagogy through the professional development of university chemistry teachers. The epistemological interpretive paradigm was used to guide the study. The study assumed a naturalistic, exploratory investigation. The qualitative research methodology was used to conduct the study. Nine university teachers were purposively sampled from three universities (three teachers from each university) for the study. Data were collected through semi-structured interviews, participant observations, and focus group discussions. Data analysis was completed using the thematic networks analysis. Ethics considerations were observed by not disclosing personal information of the participants or information about the universities where they represented. This study was guided by four theoretical underpinnings: the connectivism theory, the transformative learning theory, the expectancy-value theory, and the dual systems theory. The primary research question guiding this study was: How does the professional identity of university chemistry teachers develop as they learn IBP through WhatsApp Messenger? A two-pronged approach was used in the research: (1) comparing the professional identity of the teachers before and after the course, and (2) observing and describing the professional identity process as the teachers undertook the course. The results from the interviews conducted before the teachers undertook the WhatsApp Messenger-based IBP course showed that most teachers had a negative professional identity. They had become teachers for a variety of reasons, but they did not consider themselves teachers and believed they would leave university teaching if opportunities arose in the industry. They had no formal qualifications in pedagogy, and they did not believe that such knowledge was necessary. The majority of these teachers used teacher-centred approaches. Results from participant observations during the WhatsApp Messenger-based IBP course showed that the course slowly imparted to the teachers the norms associated with not only IBP, but other teaching approaches as well. WhatsApp Messenger provided a flexible online platform where the teachers interacted and exchanged ideas without the need to meet in a physical space. The results from the interviews conducted after the teachers participated in the WhatsApp Messenger-based IBP course showed that the participants' professional identity had changed positively. They now recognised the importance of pedagogy in teaching, they positively identified with the teaching profession, and some were considering acquiring formal qualifications in pedagogy. / Lolu cwaningo beluphenya ithuba lokusetshenziswa kwangempela kwe-WhatsApp Messenger njengethuluzi lokuqinisa isithombe sesisebenzi kanye nohlelo lokufundisa olwencike phezu kophenyo lothisha besifundo seKhemistri (chemistry) enyuvesi, ngohlelo lokuthuthukisa abasebenzi. Uhlelo lwepharadayimu echazayo ye-ephistemoloji lwasetshenziswa ukuhlahla indlela yesifundo, okuyindlela enqume ukulandela indlela yemvelo, ephenyayo. Umethodoloji wocwaningo olwencike kuKhwalithi (Qualitative) lusetshenzisiwe ukwenza ucwaningo, ndawonye nothisha basemanyuvesi ayisishiyagalolunye abakhethwe ngenhloso kumanyuvesi amathathu (abathathu kwinyuvesi eyodwa). Idatha yaqoqwa ngokusebenzisa izinhlolovo ezimbaxambili (semi-structured interviews), ngokubheka izenzo zomdlalindima (participant observation) kanye nezingxoxo zeqembu eliqondiwe (focus group discussions), kanti ukuhlaziywa kwedatha kwenziwa kwaqedwa ngokusebenzisa uhlelo lokuhlaziya oluwuthungelelwano lwendikimba (thematic network analysis). Kubonakele ukulandelwa komgomo wokuziphatha ngokungadaluli ulwazi lomuntu ongumdlalindima noma ulwazi olumayelana namanyuvesi ababewameleyo. Ucwaningo beluholwa yizinhlaka ezine zethiyori: i-connectivism theory, i-transformative learning theory, i-expectancy-value theory kanye nama-dual systems theory. Umbuzo wokuqala wezocwaningo ohola ucwaningo bewuthi: Ngabe isithombe sobizo lobuthishela wekhemistri enyuvesi sithuthukiswa kanjani ngesikhathi befunda uhlelo lwemfundo eyencike ekuphenyeni (inquiry-based pedagogy (IBP) ngokusebenzisa i-WhatsApp Messenger? Indlela embaxambili iye yasetshenziswa: 1) ukuqhathanisa isithombe sobizo lobuthishela ngaphambi nangemuva kwesifundo,, kanye no-2) baqhathanisa isithombe sobizo lobuthishela sothisha ngaphambi nangemuva kwesifundo, kanye no 2) babheke futhi bachaza uhlelo lwezimpawu zokwakha isithombe sobizo lobuthishela njengoba othisha baye badlala indima kulesi sifundo. Imiphumela evela kwizinhlolovo ezenziwe ngaphambi kokuba othisha bahambele isifundo se-WhatsApp Messenger-based IBP, ikhombise ukuthi iningi lothisha libe nesithombe sobizo esibi. Baye bafundela ubuthishela ngezizathu ezahlukahlukile, kodwa abakaze bazibona bangothisha futhi baye bacabanga ukuyeka inyuvesi uma ngabe kuvela amathuba kwimboni. Abakaze babe neziqu zokufundisa, kanti abazange bakholwe ukuthi ulwazi olunjalo kwakunesidingo sokuba nalo, kanti iningi lothisha lwalandela indlela izindlela ezencike kuthisha. Imiphumela evela ekubukeni izenzo zothisha ngesikhathi sesifundo se-IBP ikhombise ukuthi isifundo kancane kancane sinikeze othisha izimfundiso ezithile, kanti futhi nezinye izindlela zokufundisa. Uhlelo lwe-WhatsApp Messenger lunikeze inkundla ye- inthanethi engenamngcele lapho othisha bebahlangana futhi baphakelane ngemibono nhlangothi zombili ngaphandle kwesidingo sokuhlangana endaweni ephathekayo. Ngemuva kwesifundo se-IBP abadlalindima baye babika ukuthi babone izithombe zobizo lwabo zizinhle kakhulu. Manje sebeyakwazi ukubaluleka kwendlela yephedagogi ekufundiseni, bazibona behambisane kahle kakhulu nobizo lobuthishela. Kanti abanye baze bacabanga ukuthola ezinye iziqu ezisemthethweni zobizo lobuthisha. / Thuto e, e dirile dipatlisiso tsa kgonagalo tsa go dirisa WhattsApp Messenger jaaka sediriso sa go tlotlomatsa tlhaolo ya borutegi le potsiso theo ya thuto ya sekolo ya barutabana ba Yunibesithi ba thuto ya khemise, ka tlhabololo ya borutegi. Go dirisitswe pharataeme ya phetolo ya episitemoloji go kaela thuto e e tsaletseng botlhagiso jwa tlhago le tlhotlhomiso. Thutatsela ya patlisiso e e boleng e ne ya dirisiwa go tsamaisa thuto, le barutabana ba ba robongwe ba diyunibesithi tse di neng di na le maikemisetso a bosupi go tswa mo diyunibesithi tse tharo (ba bararo go tswa mo go nngwe le nngwe ya tsona). Didatha di ne di kgobokantswe ka seka-popego sa dipuisano, kelotlhokomelo ya batsayakarolo le tsepamiso ya setlhopha sa dipuisano, fa tshekatsheko ya datha e feditswe ka go dirisa tshekatsheko ya kgokagano ya thitokgang. Kelotlhoko ya maitshwaro e ne e na le tlhokomelo ka go se senole tshedimosetso ya batsayakarolo kgotsa tshedimosetso ka diyunibesthi tse e leng baemedi ba tsona. Thuto e ne e kaelwa ke metheo e mene ya tiori: tiori ya kopano, tiori ya phetogo ya thuto, tiori ya boleng jo bo solofetsweng le tiori ya thulaganyo. Potso e kgolo ya patlisiso e e kaelang thuto e ne e le: tlhaolo ya borutegi e gola jaang mo barutabaneng ba yunibesithi ba thuto ya Khemise fa ba ithuta thuto ka theo-potsiso ya petakoji (IBP) ka WhatsApp Messenger? Go thapilwe tlhagiso e e tlhagelelang gabedi 1) go farologanya tlhaolo ya barutabana pele le morago ga khoso le 2) go ela tlhoko le go tlhalosa tshedimosetso ya tlhaolo ya borutegi jaaka barutabana ba batsayakarolo mo khosong. Dipholo tsa tsamaiso ya potsotherisano e e neng e le teng pele ga go tsena khoso ya WhatsApp Messenger-based IBP, di bontsha gore ba bantsi ba na le tlhaolo ya borutegi jo bo sa siamang. Ba ne ba nna barutabana ka mabaka a a rileng a a sa tshwaneng fela ba sa ipone sentle jaaka barutabana, ka megopolo ya go tlogela Yunibesithi fa ditšhono tsa intasetari di tlhagelela. Ba ne ba sena boatlhodi jwa semmuso ba petakoji, mme ba ne ba sa dumele gore kitso e jaana e a tlhokagala, ka bone bontsi bo ne bo tsaletswe ditlhagiso tsa go tsepama mo borutabaneng. Dipholo tsa kelotlhoko ya batsayakarolo mo nakong ya khoso ya IBP di bontsha gore khoso e e neetse barutabana ditlwaelo tse di rileng tse di sa tsamaisaneng fela le IBP gape le ditlhagiso tse dingwe tsa borutabana. WhatsApp Messenger e kgona go abelana mo polatefomong e e bonolo ya inthanete mo barutabaneng ba ba tlhaeletsanang le go abelana dikakanyo kwa ntle ga tlhokego ya go kopana mo lefelong ka sebele. Morago ga khoso ya IBP batsayakarolo ba begile gore ba leba ditlhaolo tsa bone tsa borutegi ka letshwao la koketso. Jaanong ba lemogile botlhokwa jwa petakoji mo go ruteng, se se tlhagisiwa ka letshwao la koketso mo boruteging jwa go ruta, ba bangwe ba ntse ba akanya go nna le boatlhodi jwa semmuso ka mo petakoji. / Curriculum and Instructional Studies / D. Phil. (Curriculum Studies)