Avhandlingen syftar till att undersöka folkhögskoledeltagares sociala representationer om högskola och universitet. Enligt teorin om sociala representationer är folkhögskoledeltagarnas sociala representationer om högskola och universitet något som skapas socialt och förändras beroende på deltagarnas erfarenheter av högskola och universitet. Avhandlingen syftar också till att undersöka dessa sociala representationers ursprung och framväxt, liksom om de har påverkats av andra sociala representationer exempelvis dem om folkhögskolans särart. För att identifiera folkhögskole­deltagarnas sociala identitet och sociala representationer har jag använt mig av empiriska data insamlat genom fria associationer och intervjuer med folkhögskoledeltagare och före detta folkhögskoledeltagare. För att undersöka representationernas ursprung har jag genomfört en dokument­studie på folkhögskolelärarnas tidskrift. Resultaten visar att folkhögskolans företrädare genom hela folkhögskolans historia har förhållit sig till två huvudidéer, den om folkhögskolans särart och den om att folkhögskolan är en institution som anpassar sig efter det omkringliggande samhället och dess krav. Dessa båda idéer förklarar varför olika sociala identiteter och olika sociala representa­tioner existerar bland folkhögskoledeltagarna. Grundidén att folkhögskolan har en särart leder till representationer om folkhögskolan som ett alternativ till annan utbildning och högskola och universitet som något som inte är likt folkhögskola. Den andra grundläggande idén om folkhögskolan som en institution som ständigt anpassar sig leder till representationer om folkhögskolan som en andra chans och högskolan som mål. / The thesis aims to investigate folk high school participants’ social representations of university. According to the theory of social representa­tions, folk high school participants’ social representations of university are created socially and change depending on their experiences of university. The thesis also aims to investigate the origins of these social representations and how they have developed over time, as well as whether and how these rep­resent­ations have been affected by other social representa­tions, such as those of the distinctive character of folk high school. In order to identify folk high schools participants’ social identities and social rep­resenta­tions, I have made use of empirical data collected through free associa­tions and interviews with folk high school participants and former folk high school participants. To discover the origin of the representations and how they developed over time, I conducted a document study of an important folk high school teacher magazine. The results show that throughout the history of folk high schools, the institution has remained true to two basic ideas. These two fundamental ideas explain why different social identities and different representa­tions exist among the participants. The idea of folk high school as something different and special, leads to representations of folk high school as an alternative to other forms of education and to representations of university as some­­thing unlike folk high school. The second idea – that folk high school must adapt to the surrounding community – leads to representations of folk high school as a second chance and social representations of university as a goal.

Avhandlingen syftar till att undersöka folkhögskoledeltagares sociala representationer om högskola och universitet. Enligt teorin om sociala representationer är folkhögskoledeltagarnas sociala representationer om högskola och universitet något som skapas socialt och förändras beroende på deltagarnas erfarenheter av högskola och universitet. Avhandlingen syftar också till att undersöka dessa sociala representationers ursprung och framväxt, liksom om de har påverkats av andra sociala representationer exempelvis dem om folkhögskolans särart. För att identifiera folkhögskole­deltagarnas sociala identitet och sociala representationer har jag använt mig av empiriska data insamlat genom fria associationer och intervjuer med folkhögskoledeltagare och före detta folkhögskoledeltagare. För att undersöka representationernas ursprung har jag genomfört en dokument­studie på folkhögskolelärarnas tidskrift. Resultaten visar att folkhögskolans företrädare genom hela folkhögskolans historia har förhållit sig till två huvudidéer, den om folkhögskolans särart och den om att folkhögskolan är en institution som anpassar sig efter det omkringliggande samhället och dess krav. Dessa båda idéer förklarar varför olika sociala identiteter och olika sociala representa­tioner existerar bland folkhögskoledeltagarna. Grundidén att folkhögskolan har en särart leder till representationer om folkhögskolan som ett alternativ till annan utbildning och högskola och universitet som något som inte är likt folkhögskola. Den andra grundläggande idén om folkhögskolan som en institution som ständigt anpassar sig leder till representationer om folkhögskolan som en andra chans och högskolan som mål. / The thesis aims to investigate folk high school participants’ social representations of university. According to the theory of social representa­tions, folk high school participants’ social representations of university are created socially and change depending on their experiences of university. The thesis also aims to investigate the origins of these social representations and how they have developed over time, as well as whether and how these rep­resent­ations have been affected by other social representa­tions, such as those of the distinctive character of folk high school. In order to identify folk high schools participants’ social identities and social rep­resenta­tions, I have made use of empirical data collected through free associa­tions and interviews with folk high school participants and former folk high school participants. To discover the origin of the representations and how they developed over time, I conducted a document study of an important folk high school teacher magazine. The results show that throughout the history of folk high schools, the institution has remained true to two basic ideas. These two fundamental ideas explain why different social identities and different representa­tions exist among the participants. The idea of folk high school as something different and special, leads to representations of folk high school as an alternative to other forms of education and to representations of university as some­­thing unlike folk high school. The second idea – that folk high school must adapt to the surrounding community – leads to representations of folk high school as a second chance and social representations of university as a goal.

Doctoral thesis in detail and comprehensively deals with mechanic of incipient bedload motion for gravel-bed rivers. This study based on theoretical knowledge, experimental researches, numerical models and field survey extends present knowledge concerning with incipient bedload motion and sediment transport at small relative height and hydraulically rough surface bed for turbulent unaerated free surface flow. Incipient bedload motion and sediment transport have been determined for homogeneous and inhomogeneous bed materials. For homogeneous bed material the velocity profiles have been described by different methods in near the bed. Further, hydraulic flow resistance has been evaluated. In the case of inhomogeneous bed material, static armouring and influence of surface layer sorting on hydraulic roughness have been investigated. The correctness of obtained knowledge has been confirmed on the object of nature-inspired river widening. Results shown, among others, that incipient bedload motion does not depend on relative height or final armouring of surface layer to what extend hydraulic roughness is influenced.

<p> In the study area, the South Saskatchewan River has a sandy bed (mean diameter .3mm) with irregularly-shaped braid bars termed sand flats. These range in length from 50 to 2000 m. The river has an average discharge of 220m^3/sec, with a mean annual flood of 1450 m^3/sec. The river has been dammed upstream of the study area since 1965, but little downcutting has occured. </p> <p> Ripples, sand waves and dunes are the equilibrium bedforms present . Ripples and dunes are well known , but sand waves are long , low bedforms with superimposed ripples, lack scour troughs, and occur at lower flow velocities than dunes . Foreset-type bars are also present , but are not equilibrium forms . They result from flow expansion around older topography. They occur at (1) channel junctions, (2) channel bends, (3) areas of channel widening, (4) places of vertical flow expansion . They deposit planar crossbeds. </p> <p> Large areas of the river have many sand flats with no major channels, and may even lack minor channels. These areas are termed sand flat complexes. Where a major channel curves around a sand flat complex, a large diagonal bar is deposited. It is mainly on the tops of these bars where new sand flats form. </p> <p> The major channels rarely exceed 5 m in depth, but may be 150m wide. They are floored by sinuous-crested dunes with sand waves and ripples along their margins. The dunes build up during floods (2 m maximum amplitude). Large dunes occur in the deeper channels. </p> <p> Three different morphologies of small sand flats, symmetric, asymmetric and side, have been recognized. Each type forms from a bar which becomes partly immobilized where it becomes emergent. The remainder of the bar front continues to advance around this emergent nucleus. The different morphologies result because of the control exerted by preexisting deposits on the shape of the initial bar. </p> <p> Larger sand flats lack these morphologies because they have been extensively modified. The major processes of modification are vertical, lateral, and upstream accretion by bars; linking of sand flats by bars; erosional action. The variable morphologies of larger sand flats reflect only their latest modification. The stratification of sand flats is mainly planar crossbed sets deposited by the bars. </p> <p> During the winter, a 60cm thick layer of ice covers the entire system. The sand flats are immobilized because their top layers of sediments are frozen. In some places, their surfaces are disrupted by fluid escape caused by high pore pressures generated by freezing. Flow proceeds down the channels under the ice. Rafting of cobbles and scouring around grounded ice blocks takes place at breakup. </p> <p> The facies sequences resulting from sedimentation in the river are mainly sandy. Those which are deposited by channels consist dominantly of trough crossbeds, but lone planar crossbed sets may be present, deposited by large bars. Facies sequences which include sand flat deposits have several sets of planar crossbeds stacked on top of one another. All sequences have a zone of small crossbeds and ripple cross-lamination near the tops, resulting from shallow water deposition. They are capped by one-half metre of muddy flood-plain deposits. </p> / Thesis / Doctor of Philosophy (PhD)

No description available.

With reference to the demands for innovation facing the systems of tertiary education internationally, the Department of Higher Education in South Africa has been revamped since the realization of the democratic Government. In recent years, the Technical and Vocational Education and Training (TVET) College institutions became the potential learning institutions of choice that could revitalize the economy. This resulted in merging the former 152 TVET Colleges into 50 with the intention to streamline access in order to accommodate a larger number of students for technical and vocational training. The purpose of this study was to determine how student retention and success in the TVET Colleges can be effectively managed. The study was mainly guided by the theoretical framework of Bronfenbrenner’s (1979, 1995) ecological systems theory that explains individuals’ relationships with their environments by means of interrelated ecological systems functioning. Secondly, applied to this study was the principles of systems theory which supplemented Bronfenbrenner’s ecological systems theory. A mixed-methods research approach was used in determining the perceptions of TVET College personnel from different levels of institutional functioning and from students from different years of registration to determine the main factors influencing student retention and success at TVET Colleges. The empirical investigation comprised of a quantitative research approach (as phase 1) using questionnaires administered to students which was followed by a qualitative research approach (as phase 2) entailing semi-structured individual interviews with TVET College employees. The researcher used the chi-square and analysis of variables tests as analysis techniques in analysing and presenting the results in in this study. The research findings indicated a strong need for relevant career guidance provided to prospective TVET College students from primary school onwards, and the establishment of a constructive student support unit at TVET Colleges to promote student retention and success. Factors that promote the management student retention and success were identified as relating to the image and reputation of TVET Colleges, sources of effective communication, and student support activities that initially and continuously motivate or hinder student retention and success in the TVET College institutions. / Na aanleiding van die oproepe om vernuwing wat tersiêre-onderwysstelsels op internasionale vlak in die gesig staar, het die Departement van Hoër Onderwys en Opleiding in Suid-Afrika sedert die instelling van 'n demokratiese regering verskeie verbeteringe ondergaan. In die afgelope aantal jare het instellings in die tegniese en beroepsonderwys- en opleidingsektor potensiële voorkeurleerinstellings geword wat die vermoë het om die ekonomie nuwe lewe te gee. Dit het gelei tot die samesmelting van die voormalige 152 kolleges in die sektor tot 50 kolleges, met die doel om toegang te vergemaklik sodat meer studente vir tegniese en beroepsopleiding ingeneem kan word. Die doel van hierdie studie was om te bepaal hoe faktore wat studentbehoud en -sukses beïnvloed, doeltreffend in die tegniese en beroepsonderwys- en opleidingskollegesektor bestuur kan word. Die studie is gerig deur die teoretiese raamwerk van Bronfenbrenner (1979, 1995) se ekologiese-stelselteorie. Hierdie teorie verklaar individue se verhoudings met hul omgewings met behulp van ekologiese stelsels wat in verhouding met mekaar funksioneer. Tweedens, aan die studie was beginsels van stelsels teorie toegevoeg wat Bronfenbrenner se ekologiese stelsels teorie aanvul. Die empiriese ondersoek het bestaan uit ʼn kwantitatiewe navorsingsbenadering waarby vraelyste aan studente uitgedeel is, gevolg deur ʼn kwalitatiewe navorsingsbenadering wat semi-gestruktureerde individuele onderhoude met werknemers by tegniese en beroepsonderwys- en opleidingskolleges behels het. Die navorsingsbevindinge het gedui op ʼn sterk behoefte aan die voorsiening van toepaslike beroepsvoorligting aan leerders op laerskool en verder wat voornemens is om aan tegniese en beroepsonderwys- en opleidingskolleges te studeer, asook die vestiging van ʼn konstruktiewe studentesteuneenheid by hierdie kolleges om studentebehoud en -sukses te bevorder. Faktore wat studentebehoud en -sukses bevorder is geïdentifiseer as dié wat verband hou met die beeld en reputasie van tegniese en beroepsonderwys- en opleidingskolleges, bronne van doeltreffende kommunikasie, en studentesteunaktiwiteite wat aanvanklik en deurlopend as motivering vir studentebehoud en -sukses in hierdie sektor dien of dit belemmer. / Mayelana na xilaveko xa vutumbuluxi lebyi mafambiselo ya swikolo le ya langutiseneke na wona misava hinkwayo, Ndzavisiso ya tidyondzo ta le henhla ya Afrika Dzongayi cincile ku sukela loko hi ri eka mfumo wa xidimokirasi, Eka masiku ya namuntlha, tikholichi ta Vuthikiniki na dyondzo na vuleteri (TVET) ti hundzukile swikolo leswi nga langiwaku ku pfuxelela ikhonomi. Leswi swi endlile leswaku ku katsiwa tikholichi to ringana 152 leswaku ti va 50 ku ri ku endlela leswaku ku tekiwa na ku leteriwa vana va ku tala. Xikongomelo a ku ri ku endlela leswaku machudeni va nga lawuriwa na ku humelerisiwa njhani eka ti kholichi ta ti TVET. Dyondzo leyi yi rhangeriwa hi mavonelo ya malavisiselo ya Bronfenbrenner’s (1979, 1995), mavonelo ya matshamelo na mahlamuselo ya vuxaka eka mpfanganyiso wa matirhiselo, xavumbirhi, Dyondzo leyi yi tirhisile milawu ya mafambiselo na mavonelo lama tatisaku maendleo ya matshamelo na mafambiselo ya Bronfenbrenner. Malaviseselo ya maendlelo yo pfanganana ya tirhisiwile eka mavonelo ya va tirhi ya tikholichi ta ti TVET ku suka eka matshamelo na matirhelo yaku hambana hambana ku sukela eka malembe ya ntsariso ku endlela ku kuma nsusumeto wa ku humelela ka machudeni etikholichi. Ndzavisiso lowu wu katsakanya maendlelo ya khwalithethivhi, eka xiyenge xo sungula hi ku tirhisa swivutiso leswi nga ta xiyisisiwa eka machudeni swi tlhela swilandelerisiwa hi maendlelo ya malavisiselo ya khwalithethivhi (eka xiyenge xa vumbirhi) hi ku kandzelerisiwa hi nwangulano wa xiphemu na vatirhi va ti kholichi ta ti TVET. Mulavisisi u tirhisile xikwere xa chi na ku xopaxopa swiphemu swa swikambelo leswi a swi xopa xopiwa loko ku bumabumeriwe / hlayiwe mbuyelo wa ndzavisiso. Mbuyelo wu kombisa swinene leswaku kuna ku yelana eka ndzetelo lowu nyikiwaku machudeni ya ti kholichi ta TVET ku suka eswikolweni swa le hansi ku ya ehenhla, na ku tumbuluxiwa ka xiyenge xa mpfuno wa machudeni etikholichini ta ti TVET ku tlakusa ku tiyisa na ku humelela ka machudeni. Swi nwana leswi susumetaku ku tlakusa na ku tiyisa vufambisi eku tlakuseni na ku humelerisa machudeni ya ti kholichi ta ti TVET swikombisa swi fananisiwa na xiyimo na xindzhuti xa swikolo leswi, swipfuno swa mavulavulelo, na swipfuno swa switirhisiwa swa mpfuno wa machudeni wa masungulo kumbe wa ku yisa nkucetelo kumbe xirhalanganyi xa ku tlakusa na ku pfuna ku humelela eka tikholichi ta ti TVET. MARITO NKULO / Educational Management and Leadership / D. Ed. (Education Management)