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En av de stora uppgifterna med en verksamhet är att anpassa sig efter omgivningen för att leverera den efterfrågade produkten eller tjänsten. Därmed finner verksamheter behovet av att anpassa arbetssättet internt för att öka konkurrenskraften samt hitta lösningar till problem som uppstår i samband med marknadsförändringar. Begreppet agilitet skapades i början av 2000-talet i samband med det teknologiska genombrottet och syftar till att organisera samt strukturera arbetssättet inom verksamheter. För att finna en djupare mening i fenomenet handlar denna uppsats om hur agila verksamheter inför agila arbetsmetoder och hur dessa arbetsmetoder fungerar i praktiken. Undersökningen baseras på datainsamling i form av djupintervjuer samt vetenskapliga artiklar och de framtagna teoretiska ramverken. Studien innehåller även en tydlig koppling till IT-baserade arbetssystem inom verksamheter, vilket är den viktigaste förutsättningen för verksamheter i dagens samhälle. Studien bidrar med ett resultat där anställda upplever olika förändringar i utförandet av arbetet genom att verksamheten inför agila arbetsmetoder. / One of the primary purposes of an organization is to adapt to its environment in order to deliver the demanded product or service. Consequently, organizations find the need to adapt their internal processes to increase competitiveness and find solutions to problems arising from market changes. The concept of agility emerged in the early 2000s in conjunction with the technological boom and aims to organize and structure work methods within organizations. To delve deeper into this phenomenon, this essay explores how agile organizations adopt agile work methods and how these methods function in practice. The research is based on data collection through in-depth interviews and scientific articles, within a theoretical framework. The study also includes a clear connection to information systems within the organization, which are crucial prerequisites for businesses in today's society and organization. The study contributes with a result where employees experience different changes in the performance of the work through the introduction of agile working methods.

Bats are some of the most agile flyers in nature. Their wings are highly articulated which affords them very fine control over shape and form. This thesis investigates the flight of Hipposideros Pratti. The flight pattern studied is nominally level and straight. Measured wing kinematics are used to describe the wing motion. It is shown that Proper Orthogonal Decomposition (POD) can be used to effectively to filter the measured kinematics to eliminate outliers which usually manifest as low energy higher POD modes, but which can impact the stability of aerodynamic simulations. Through aerodynamic simulations it is established that the first two modes from the POD analysis recover 62% of the lift, and reflect a drag force instead of thrust, whereas the first three modes recover 77% of the thrust and even more lift than the native kinematics. This demonstrates that mode 2, which features a combination of spanwise twisting (pitching) and chordwise cambering, is critical for the generation of lift, and more so for thrust. Based on these inferences, it is concluded that the first 7 modes are sufficient to represent the full native kinematics. The aerodynamic simulations are conducted using the immersed boundary method on 128 processors. They utilize a grid of 31 million cells and the bat wing is represented by about 50000 surface elements. The movement of the immersed wing surface is defined by piecewise cubic splines that describe the time evolution of each control point on the wing. The major contribution of this work is the decomposition of the native kinematics into canonical flapping wing physical descriptors comprising of the flapping motion, stroke-plane deviation, pitching motion, chordwise, and spanwise cambering. It is shown that the pitching mode harvests a Leading Edge Vortex (LEV) during the upstroke to produce thrust. It also stabilizes the LEV during downstroke, as a result, larger lift and thrust production is observed. Chordwise cambering mode allows the LEV to glide over and cover a large portion of the wing thus contributing to more lift while the spanwise cambering mode mitigates the intensification of LEV during the upstroke by relative rotation of outer part of the wing ( hand wing ) with respect to the inner part of the wing ( arm wing). While this thesis concerns itself with near straight-level flight, the proposed decomposition can be applied to any complex flight maneuver and provide a basis for unified comparison not only over different bat flight regimes but also across other flying insects and birds. / MS / Bats are some of the most agile flyers in nature. Their wings are highly articulated which affords them very fine control over shape and form. This thesis investigates the flight of Hipposideros Pratti. The flight pattern studied is nominally level and straight. Measured wing kinematics are used to describe the wing motion. The central motivation of the thesis is to characterize how the bat uses its wings to generate lift to counter gravity and thrust to move forward against drag forces. A mathematical filter based on Proper Orthogonal Decomposition (POD) is used to filter the measured wing motion to eliminate high frequency noise in the data but at the same time including including the important motions which produce lift and thrust. The filtered native kinematics is decomposed into flapping wing motions comprising of flapping mode, stroke-plane deviation, pitching motion, chordwise, and spanwise cambering. It is shown that the pitching mode harvests the low pressure region created by the Leading Edge Vortex (LEV) during the upstroke to produce thrust. It also stabilizes the LEV during the downstroke, as a result, larger lift and thrust production is observed. Chordwise cambering mode allows the LEV to glide over and cover a large portion of the wing thus contributing to more lift, while the spanwise cambering mode mitigates the intensification of LEV during the upstroke by relative rotation of the outer part of the wing (hand wing) with respect to the inner part of the wing (arm wing). While this thesis concerns itself with near straight-level flight, the proposed decomposition can be applied to any complex flight maneuver and provide a basis for unified comparison not only over different bat flight regimes but also across other flying insects and birds.

The aim of the study was to investigate the changing role of the secondary school principal in building sustainable communities. It is supposed that communities that are not sustainable affect secondary schools. The focus is on how the secondary school principal should go about building, sustaining and uplifting the school community. The direct and indirect involvement of secondary school principals in community issues, could contribute to sustainability within the community, which gradually becomes a reality. The task of the secondary school principal is realised through the results of effective educative teaching and learning practices. Through literature study it was found that the role of the secondary school principal in enhancing sustainable communities would contribute to the upliftment of communities. The qualitative approach was successful in obtaining information about how the changing role of the secondary school principal in building sustainable communities is viewed. Recommendations were made concerning research findings for stakeholders and officials to note. / Educational Studies / M.Ed(Education Management))

This research project focuses on conversions from Islam to Christianity in the Sudan. It first gives a biblical and theological understanding of conversion and then introduces the sociological and psychological understanding of such a change in religious affiliation. It discusses conversion as a spiritual decision process and develops a spiritual decision matrix for evaluating conversion processes of Muslims. The heart of the study is an analysis of the conversion processes of six converts with a Northern Sudanese background from different Muslim tribes. The interviews that were conducted with these converts are analysed in terms of five parameters: reasons for conversion; factors that led to conversion; stages in the conversion processes; problems encountered during the conversion processes; and results of the conversion. These parameters are compared with existing data from six studies of Muslims in other geographical areas who also converted to the Christian faith. / Christian Spirituality Church History and Missiology / M.Th. (Missiology)

This study explores the topic of music theory pedagogy in conjunction with the Kodály concept of music education and its North-American adaptation by Lois Choksy. It investigates the compatibility of the Kodály Method with post-secondary instruction in tonal harmony, using a theoretical framework derived from Kodály’s methodology and implemented as a teaching strategy for the dominant-seventh chord. The customary presentation of this concept is authenticated with an empirical case study involving four university professors. Subsequently, Kodály’s four-step instructional process informs a comparative analysis of five university-level textbooks that evaluates the sequential placement of V7, examines the procedure by which it is presented, and considers the inclusion of correlated musical excerpts. Although divergent from traditional approaches to tonal harmony, Kodály’s principles and practices are pedagogically effective. By progressing from concrete to abstract, preceding symbolization with extensive musical experience, conceptual understandings are not only intellectualized, but are developed and internalized.

Construit en multiréférentialité, sur les postulats de la psychologie socioculturelle de Vygotski, de l’analyse clinique de l’activité (Y. Clot), de l’ergonomie de l’activité, cette étude a pour finalité de construire une intelligibilité des pratiques, habitus et singularité entremêlés, dans une approche compréhensive et développementale des actions de préparation, comme « une présence au futur » .Quel(s) liens font les enseignants entre le sens, la forme et les modalités de leur action anticipatrice de préparation et le cours d’action de leur conduite effective de la classe, leur pilotage des tâches, dans la complexité d’une situation d’enseignement-apprentissage, à l’école élémentaire au cours d’une expérimentation de terrain en autoconfrontation croisée ?Cette PROBLEMATIQUE s’organise dans une démarche descriptive et compréhensive autour de trois HYPOTHESES : L’hypothèse 1, sur la nature de la pratique - chaque professionnel interprète différemment la préparation. L’hypothèse 2, entre ce sur quoi porte l’anticipation de la séance (facilitant ou non la gestion de l’imprévu) et son pilotage effectif. L’hypothèse 3, sur les prolongements possibles en formation.La METHODE, une « quasi-expérimentation », permet l’accès à la réalité quotidienne des pratiques, dans un espace de co-construction praticiens / chercheur, en appui de l’autoconfrontation qui permet de «faire vivre la conscience pour l’étudier» (Vygotski), lorsque celle-ci est mise à disposition d’un collectif professionnel, constituant le corpus, arrêté, in fine, sur cinq acteurs singuliers, pour une recherche de typicalité de cas d’enseignants.Les INDICATEURS d’analyse, organisés autour des traces et des conceptions de la préparation, permettent d’éclairer le paradigme d’anticipation et la préparation :- Il existe plusieurs configurations déterminées par le rapport au support-outil et la gestion des interactions langagières.- Le déroulement effectif de la classe est le résultat d’un système d’interactions entre le pilotage à partir de la préparation et les interprétations, incertitudes majeures, que les élèves font des tâches. - En anticipant avec le cadre linéaire de la préparation « canonique » l’enseignant pilote du linéaire, a contrario de l’apprentissage et n’intègre pas de possibilité d’improvisation . Ce n’est pas un outil suffisant du métier, il permet d’établir des relations de détermination, mais peu de relations de signification : l’interprétation reste donc en tension. Pour résoudre cette tension, on peut envisager une voie complémentaire, au croisement d’une clinique de la relation éducative et d’une clinique de l’activité : une post-paration individuelle et collective. Cette POST-PARATION – qui permet de problématiser, d’introduire quelque chose qui n’est pas dans le constat de situation et de se positionner dans cette présence au futur pour permettre l’ajustement de l’action - corrélée avec le style professionnel, en lien avec le genre est constitutive d’un capital de mise en mots et d’un répertoire de mise en actes, qui sont des ressources pour préfigurer l’action. / Built in multireferentiality, on the postulates of the sociocultural psychology of Vygotski, of the clinical analysis of activity (Y. Clot), of the ergonomics of the activity, the finality of this study is to build an intelligibility of the practices, habitus and singularity intermingled, in an understanding and développementale approach of the actions of preparation, like “a presence with the future” .Which bonds make the teachers between the direction, the form and the methods of their anticipatrice action of preparation and the action in progress of their effective control of the class, their leading (piloting) of the tasks, with the complexity of a situation of teaching-training, at the elementary school during an experimentation of ground in cross autoconfrontation?This PROBLEMATIC is organized in a descriptive and understanding step around three ASSUMPTIONS: Assumption 1, about the nature of the practice - each professional interprets the preparation differently. Assumption 2, between it to what the anticipation of the meeting relates (facilitating or not the management of unforeseen) and its effective piloting. Assumption 3, on the possible prolongations in formation.The METHOD, a “quasi-experimentation”, the access to the daily reality of the practices allows, in an enquiring space of co-construction experts / researcher, in support of the autoconfrontation which makes it possible “to make live the conscience to study it” (Vygotski), when this one is placed at the group of professional’s disposal, constituting the corpus, decree, in fine, on five singular actors, for a search for typicality of case of teachers.The INDICATORS of analysis, organized around the traces and of the designs of the preparation, make it possible to clarify the paradigm of anticipation and the preparation:- There are several configurations determined by the report with the support-tool and the management of the linguistic interactions.- The progress of the real enfolding class is the result of a system of interactions between piloting starting from the preparation and interpretations, major uncertainties, that the pupils make with the tasks. - While anticipating with the linear framework of the “canonical” preparation the teacher controls the linear one, on the opposite of the training and does not integrate a possibility of improvisation . It is not a sufficient tool of the trade, it makes it possible to establish relations of determination, but few relations of significance: interpretation thus remains in tension.To solve this tension, one can plan a complementary way, with the crossing of a private clinic of the educational relation and a private clinic of the activity: an individual and collective post-paration. This POST-PARATION - which allows problématiser, to introduce something which is not in the report of situation and to be in this presence with the future to allow the adjustment of the action - correlated with the professional style, in bond with the kind is constitutive of a capital of setting in words and of a repertory of acting out, which is resources to precede the action.

The Counter-Rotating Open Rotors (CROR) are identified as a possible alternative to turbofan engines for middle-range aircrafts. Providing significant fuel savings and reducing the green-house gas emissions, they may lead however to an increased noise radiation due to the absence of nacelle shielding. To properly predict the acoustic radiation of such systems is then mandatory both to reduce the source mechanisms of the isolated engine and to offer an optimal noise installation solution. Such an objective is tackled in the present thesis in two steps. In a first part, the research aims at predicting the tonal noise radiated from the first propeller of CROR mounted on the rear fuselage by means of a pylon (pusher configuration), considering both the pylon-wake and the uniform ow effects. From the Ffowcs Williams & Hawkings' formalism, three noise sources are identified. First the unsteady loading is computed using a similar procedure to the one used for the rotor-rotor wake interaction noise prediction. The velocity deficit in the pylon wake is locally expanded in two-dimensional Fourier gusts in a reference frame attached to the front rotor. The unsteady lift induced by each gust on a blade segment is calculated using a linearized analytical response function that accounts for a realistic geometry. The steady loading is the second source contribution and is evaluated using both a software based on the lifting-line theory and some numerical simulations for different reference source surfaces. Finally the thickness noise due to the blade volume displacement is included in the analysis using Isom's formulation. From the linear acoustic assumptions, all these sources modelled as equivalent acoustic dipoles rotating in a uniformly moving atmosphere are then summed to calculate the far-field noise. The whole methodology is assessed against wind-tunnel test data and reference software predictions. A parametric study considering several pylon positionings and pylon-wake configurations with blowing is performed in order to emphasize the relative contribution of the three noise sources. Secondly, the rotor- rotor wake interaction noise being recognized as the most significant contribution in isolated configuration, its modelling is completed by introducing the dynamics of the vortex occurring near the rear-rotor leading edge. A semi-analytical methodology is developed to determine a vortex attached over a at plate embedded in a uniform ow with incidence. Applied to the case of a rear blade going through a front-rotor wake, it provides a first estimate of the noise contribution of the vortex. / Les hélices contrarotatives constituent une alternative possible aux turboréacteurs pour les avions moyens- courriers. Réduisant significativement la consommation de carburant et les émissions de gaz à effet de serre, ils peuvent néanmoins conduire à un rayonnement sonore accru de par l'absence de carénage. Prédire correctement le rayonnement sonore de telles motorisations est donc indispensable pour réduire les mécanismes sources propres au moteur isolé ou assurer une solution d'installation acoustique optimale. Un tel objectif est abordé dans cette thèse en deux temps. Dans un premier temps, l’étude vise à prédire le bruit tonal rayonné par la première hélice d'un moteur monté à l'arrière du fuselage (configuration dite en pousseur), en considérant les effets du sillage du pylône supportant le moteur et de l'écoulement moyen. Partant du formalisme de Ffowcs Williams & Hawkings, trois sources sonores sont identifiées à cet effet. La charge instationnaire, tout d'abord, est calculée en s'appuyant sur une méthodologie similaire à celle utilisée pour la prédiction du bruit d'interaction de sillages entre les deux rotors. Le déficit de vitesse dans le sillage du mât est décomposé localement en rafales bidimensionnelles dans un repère attaché au rotor amont. La portance instationnaire induite par chaque rafale sur un segment de pale est calculée en utilisant une fonction de réponse analytique linéarisée considérant une géométrie réaliste. Deuxième contribution, la charge stationnaire est évaluée au moyen d'un logiciel s'appuyant sur la théorie de la ligne portante mais également via des simulations numériques pour différentes surfaces sources de référence. Enfin, le bruit d'épaisseur associé au déplacement du volume de la pale est inclus dans l'analyse à partir de la formulation d'Isom. D'après les hypothèses de l'acoustique linéaire, toutes ces sources modélisées comme des dipôles acoustiques tournant dans une atmosphère uniforme en mouvement sont ensuite sommées pour calculer le bruit en champ lointain. L'ensemble de la méthodologie est comparé à des données d'essai et des prédictions d'un logiciel de référence. Une étude paramétrique considérant plusieurs positionnements du pylône et des configurations avec soufflage est effectuée afin de bien mettre en évidence les contributions relatives des trois sources sonores. Dans un deuxième temps, le bruit d'interaction de sillages étant reconnu comme la contribution majoritaire en configuration isolée, sa modélisation est complétée en introduisant la dynamique du tourbillon se développant au voisinage du bord d'attaque du rotor aval. Une méthodologie semi-analytique est développée pour déterminer un tourbillon attaché au-dessus d'une plaque plane plongée dans un écoulement uniforme avec incidence. Appliquée au cas d'une pale aval traversant le sillage du rotor amont, elle fournit une première estimation de la contribution sonore du tourbillon.

This study explores the topic of music theory pedagogy in conjunction with the Kodály concept of music education and its North-American adaptation by Lois Choksy. It investigates the compatibility of the Kodály Method with post-secondary instruction in tonal harmony, using a theoretical framework derived from Kodály’s methodology and implemented as a teaching strategy for the dominant-seventh chord. The customary presentation of this concept is authenticated with an empirical case study involving four university professors. Subsequently, Kodály’s four-step instructional process informs a comparative analysis of five university-level textbooks that evaluates the sequential placement of V7, examines the procedure by which it is presented, and considers the inclusion of correlated musical excerpts. Although divergent from traditional approaches to tonal harmony, Kodály’s principles and practices are pedagogically effective. By progressing from concrete to abstract, preceding symbolization with extensive musical experience, conceptual understandings are not only intellectualized, but are developed and internalized.

This thesis presents a study of the work of understanding one’s life. The work of understanding one’s life is what I call the work that pupils in special school and special school for adults (education for pupils, children as well as adults with intellectual challenges) themselves initiate. It is a “real” job, based on the pupils’ conditions where the purpose is to understand his or her self and learn to live in a world that is or can be experienced as unreliable. In special school the teacher has very obviously the pupil’s life in his or her hand and the way of approach that the teacher chooses is of great importance for the possibility for the pupil to work with his or her understanding of life. Analyses of concepts from existential philosophers with interdependence in focus have the purpose of understanding the work of understanding one’s life. For example K.E. Løgstrup’s philosophy on the ethical demand is discussed, as also spontaneous and revolving life expressions, Karl Jaspers’ border situations, Paul Tillich’s the courage to be and Henry Cöster’s work on ethics and social care. The discussion is put in relation to two different ways of approach that the pedagogue can choose. I call them following and leading approach. The analyses are illustrated with drawings from pupils’ and stories based on my experience of many years’ work in special school. The method, to see the alternative with distinctions, has been inspired by K.E. Løgstrup’s phenomenological interpretation of everyday reality. The result – a theory on what the work of understanding one’s life is about – is based on the discussion of the different concepts of the analysis in combination. The theory makes it possible to both speak about and relate to the work of understanding one’s life. Finally examples are given of areas, activities and situations where knowledge about the importance of the work of understanding one’s life is important for people’s possibility of taking part in community of society.