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Silén, Lars. "FLEXIBLA ARBETSTIDER : UPPLEVELSER BLAND PERSONAL ANSTÄLLDA VID EN NORRLANDSKOMMUN." Thesis, Umeå universitet, Institutionen för psykologi, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-105527.
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Denna undersökning som genomförts i en norrlandskommun belyser en grupp av femton kommunanställdas upplevelser av arbetstider vars schemaläggning förläggdes med hjälp av time-caresystemet i jämförelse med en grupp av sjutton kommunanställda som hade fast schema och heroma-önskeschemasystemet. Undersökningen som genomförts med kvantitativ metod syftade till att i ett urval av anställda i en norrlandskommun se upplevelser av arbetstider förlagda med och utan time-care avseende variabilitet (arbetsgivarens schemastyrning) och/eller flexibilitet (individens handlingsfrihet och självständighet). Trettiotvå respondenter besvarade frågeformulären. Resultatet visade signifikant att respondenterna med time-care upplevde mer överåtagande, mindre möjligheter till förutsägbarhet över en månad, mindre rättvist ledarskap och att arbetet mer påverkar deras fritid än respondenterna som hade fast schema och heroma-önskeschemasystemet. Resultatet visade även att fast/heroma-önskeschemagruppen upplevde mindre överåtaganden, mer kontroll av arbetstakt, samt en högre grad av förutsägbarhet och att de upplevde mer rättvist ledarskap än en normgrupp vilket kan belysa fördelarna med önskeschema. Nyckelord: oregelbundna arbetstider, flexibelt arbete, flexibel arbetstid, psykosocialThis study carried out in a northern municipality highlights a group of fifteen municipal employees' experiences of working hours whose scheduling was carried out using time-care system in comparison with a group of seventeen municipal employees who had fixed schedule and the heroma-wishful scheduling system. The survey conducted by quantitative method aimed at a sample of employees in a northern municipality see experiences of working placement with and without time care regarding variability (employer's schedule control) and / or flexibility (the individual's freedom and independence). Thirtytwo respondents answered the questionnaires. The results showed significant that respondents with time-care experienced more of overcommitment, less potential for predictability over a month, less fair leadership and to work more affecting their leisure time than respondents with fixed schedule and the heroma-wishful scheduling system. The results also showed that the staff with fixed/heroma-wishful scheduling system experiences less of overcommitments, more in control of the pace of work, and a higher degree of predictability and that they experienced more equitable leadership than a norm group which can highlight the benefits of wishful schedule. Keywords: irregular working hours, flexible work, flexible working, psychosocial
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Wessels, Paul Petrus Franciscus. "Flexible theories for flexible molecules." [S.l. : Amsterdam : s.n.] ; Universiteit van Amsterdam [Host], 2002. http://dare.uva.nl/document/62873.
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Leung, Cefee Siu-Kuen Carleton University Dissertation Computer Science. "Towards flexible user interfaces: flexible menus." Ottawa, 1989.
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Andersson, Gabriel. "Det flexibla klassrummet, ett hjälpmedel för pedagoger. : En förbättrad klassrumsmiljö som underlättar kommunikationen mellan pedagoger och studenter." Thesis, Mälardalens högskola, Akademin för innovation, design och teknik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-32104.
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Detta examensarbete är en studie i hur man kan utforma ett flexibelt klassrum med fokus på att underlätta och förändra arbetssättet för pedagoger och inlärningsmiljön för studenter. Syftet är att förbättra klassrumsmiljön, detta för att skapa ett klassrum som är välkomnande och utformad för att förbättra kommunikationen mellan pedagoger och studenter. Arbetet har utgått från CFF (Centrum för flerspråkigheter), en mottagnings- och utbildningsenhet på Brinellskolan i Fagersta för personer mellan 16 och 65 år som har till syfte att lära sig svenska. CFF lokaler är i nuläget inte anpassat för den undervisning som bedrivs där. CFF har ett behov av att anpassa klassrummens fysiska element såsom förvaring, ljudabsorbenter, whiteboardtavla och projektor. Eftersom CFF inte använder sig av hemklassrum blir det viktigt att klassrummet är utformat efter skolans aktiviteter och användare. Studien har baserats på teorier kring undervisningsprocesser, form och funktion, ljud, färg, ljus och gestaltslagar. Metoder som har tillämpats är rumsanalys, intervjuer och utvärderingsintervjuer. Utifrån detta har ett gestaltningsförslag utformats. Målsättningen med gestaltningsförslaget har varit att skapa ett flexibelt, funktionellt, estetiskt och tilltalande klassrum som är anpassade efter klassrummets olika aktiviteter. Denna studie är avsedd till att vara intressant för pedagoger, designers eller forskare inom design och pedagogik.This thesis is a study in how to design a flexible classroom environment with a focus on facilitating and supporting teachers’ and students’ working and learning. The goal is to design a classroom environment that is welcoming while also designed to improve communication between teachers and students. The work is based on the Centre for Multilingualism, an education unit that is a part of Brinellskolan in Fagersta for people between 16 and 65 years who intend to learn the Swedish language and culture. The Centre for Multilingualism’s facilities are currently not well suited to the education that is provided there. The classroom at the centre needs to be better adapted, particularly with regards to physical elements such as storage and acoustics, and display elements such as whiteboards and projectors. At the Centre for Multilingualism the students do not have their own classroom or home-room, so it is important that the classroom they use is flexible and is designed to accommodate many different activities and users at different times. This study is based on theories of spatial design such as form, function, acoustics, colouring and lighting, it also includes some cognitive theories of design. The methods that have been applied in this thesis are spatial analysis, interviews and reference objects. Based on the results of these applied theories and methods a design proposal has been created. The goal of the design proposal was to create design for a flexible, functional, and aesthetically pleasing classroom adaptable to suit a variety of educational activities and also different teachers and students with differing needs. This study is intended to be of interest to educators, designers or researchers in design and teaching methods.
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Scott, Wesley Dane. "A flexible control system for flexible manufacturing systems." Diss., Texas A&M University, 2003. http://hdl.handle.net/1969.1/158.
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A flexible workcell controller has been developed using a three level control hierarchy (workcell, workstation, equipment). The cell controller is automatically generated from a model input by the user. The model consists of three sets of graphs. One set of graphs describes the process plans of the parts produced by the manufacturing system, one set describes movements into, out of and within workstations, and the third set describes movements of parts/transporters between workstations. The controller uses an event driven Petri net to maintain state information and to communicate with lower level controllers. The control logic is contained in an artificial neural network. The Petri net state information is used as the input to the neural net and messages that are Petri net events are output from the neural net. A genetic algorithm was used to search over alternative operation choices to find a "good" solution. The system was fully implemented and several test cases are described.
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Wescott, James Terence. "The influence of flexible branches in flexible polymers." Thesis, University of Bristol, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.297924.
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Faye, Adrien. "Copolyéthersulfones rigides-flexibles : modulation des propriétés par modification du segment flexible." Doctoral thesis, Université Laval, 2016. http://hdl.handle.net/20.500.11794/26777.
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La présente thèse traite trois thèmes principaux. Le premier volet concerne le contrôle de la cristallinité et la synthèse des polyéthersulfones avec incorporation de doubles liaisons comme espaceurs dans les chaînes du polymère en utilisant deux approches différentes : la polymérisation par métathèse des diènes acycliques (ADMET) et la polycondensation. L’ADMET a permis d’obtenir des copolymères de faibles polydispersités avec des doubles liaisons régulièrement réparties le long des chaînes du polymère. La polycondensation a permis d’obtenir des copolymères de configuration cis ou trans avec incorporation régulière ou aléatoire des doubles liaisons. Pour la synthèse par ADMET, un bloc rigide, terminé par des groupements allyliques, est polymérisé dans le dichlorométhane à l’aide de l’un des catalyseurs de Grubbs : Grubbs deuxième génération (G2) ou Hoveyda-Grubbs (HG). Concernant la polycondensation, on fait réagir un bloc rigide avec un segment flexible de configuration cis ou trans pour obtenir respectivement le copolymère cis ou trans. La diffraction des rayons X et l’analyse enthalpique différentielle (DSC) ont montré que l’isomère cis inhibe complètement la cristallinité alors que la forme trans la favorise. Le deuxième volet de ce travail repose principalement sur la polycondensation en un seul pot « one pot en anglais» qui a permis de contrôler les températures de transition vitreuse. La spectrométrie de masse MALDI-TOF a permis de démontrer que les copolymères obtenus avec variation du ratio bloc rigide/segment flexible sont de nature aléatoire et non des copolymères blocs. Le troisième et dernier thème de ce document concerne principalement le contrôle de l’hydrophilicité par une post-fonctionnalisation des copolymères à travers les doubles liaisons incorporées en utilisant les réactions thiol-ène clic. Le but étant de moduler les propriétés des copolymères pour les adapter à des applications bien définies. Pour une application dans la filtration membranaire par exemple, des chaînes hydrophiles ont été greffées à travers ces doubles liaisons pour augmenter l’hydrophilicité des copolymères.This thesis deals with three main themes. The first component relates to the control of the crystallinity and the synthesis of polyethersulfones with incorporation of double bonds as a spacer in the polymer chains using two different approaches: ADMET (Acyclic Diene Metathesis Polymerization) and polycondensation reactions. ADMET leads to copolymers with low polydispersity index and double bonds regularly distributed along the polymer chains. Polycondensation allows obtaining directly cis or trans configuration copolymers with regular or random incorporation of the double bonds. For the synthesis by ADMET, a rigid block terminated by allyl groups is dissolved in dichloromethane and then polymerized using second generation Grubbs catalyst (G2) and Hoveyda-Grubbs catalyst (HG). Concerning the polycondensation reaction, a rigid block reacts with a flexible segment of cis or trans configuration to respectively give the cis or trans copolymer. X-ray diffraction and differential scanning calorimetry (DSC) showed that the cis isomer inhibits crystallization while the trans form favors it. The second part of this work is mainly based on the one-pot polycondensation reaction which allowed control the glass transition. MALDI-TOF mass spectrometry was used to show that copolymers obtained by the variation of the rigid bloc/flexible segment ratio are random and not block copolymers. The third subject of this document mainly concerns the control of the hydrophilicity by post-functionalization of copolymers through the double bonds incorporated using thiol-ene click reactions. The main goal is to modulate the properties of copolymers to suit well-defined applications. For example, for applications in membrane filtration, hydrophilic chains were grafted through double bonds to increase the copolymer hydrophilicity.
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Isdalen, Olga, and Hamsa Taufik. "Flexible building." Thesis, Linköpings universitet, Kommunikations- och transportsystem, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-144839.
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Städer i Sverige växer ständigt. Folk flyttar från ett område till ett annat område och detta leder till att byggnader i vissa distrikt börjar sakna sin betydelse. Till exempel om en räjong i staden bosätt med många barnfamiljer finns det behov för stort antal förskoleplatser och i sin tur byggnader som är anpassad för förskoleverksamhet. När räjongens befolkning mognar och barnen flyttar ut så minskar behovet av förskoleplatser och omvandlas istället till ett behov av stort antal lägenhetshus i området. Detta examensarbete har syftet att utreda möjligheten att konvertera bostadshus till förskolor i samband med den ökande befolkningsmängden och vice versa, d.v.s. att konvertera en förskola till ett lägenhetshus. Arbete berör både sociala aspekter vad gäller förskolan samt arkitektoniska perspektivet och lösningar angående hur ett flexibelt hus kan designas. Enkätundersökningen och litteraturstudier är metoder för att få fram resultatet av detta arbete. Resultatet visas i form av skisser, diagram, ritningar och renderingar.
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Anandam, Anahita. "Flexible urbanism." Thesis, Massachusetts Institute of Technology, 2006. http://hdl.handle.net/1721.1/36910.
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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Architecture, 2006.This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.
Includes bibliographical references (leaves 95-96).
This thesis seeks to find a new approach/method towards urbanization in existing low density neighborhoods in major metropolitan cities in the United States. The near South side of the city of Chicago (a city that carries a history as the most modern city in the world in the late nineteenth and early twentieth century) will be taken as a site for development. The site of the Illinois Institute of Technology has an associated history dating back to the nineteenth century as well as an extensive housing development built as a post world war two response to a lack of housing in major metropolitan cities. Today, the area stands deserted, with a few housing tower blocks that remain occupied. The idea of flexible urbanism that would benefit the Chicago neighborhood can be traced back in history to the eighteenth century, a period during which rationality created a new type of society. Rationality is fundamental to this thesis, taken to its hilt with the idea that extreme rationality could lead to a sense of madness and diversity in options and ways of living in order to organize society today.
(cont.) The idea of extreme rationality can be seen through history with the development of the prisons and asylums in the eighteenth and nineteenth century, and later in the design of the microraion, the unit of neighborhood development in the Constructivist period of the Soviet Planning process. During that period the garden city movement grew in the United Kingdom propagating the return of nature in the design of cities. A comparison to the garden city would be another new Town in England: Milton Keynes, a city where land was distinguished as separately zoned areas. These ideas of rationality and rule based zoning systems are fundamental to this thesis, and taken to its extreme to understand the city parametrically, in three dimensions. Finally, the application of this new approach towards densification shows that this strategy is one that can be used universally to revitalize, reinvigorate, and re-emphasize the use of extreme rationality in order to create vitality in cities, and diversity in use.
by Anahita Anandam.
S.M.
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Romashka, Ivan Dmitrievich. "Flexible Storylines." BYU ScholarsArchive, 2011. https://scholarsarchive.byu.edu/etd/2731.
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A long-standing goal of computer-based entertainment is the creation of a story where a user is in control of portions of the storyline. These non-linear stories give a user an opportunity to adapt the story to his or her interests, schedule and needs. The Internet has made non-linear video a reality. Different approaches have been taken to create and play non-linear video stories. They suffer from lack of simplicity, smoothness, and television-like experience in story creation and presentation. Flexible Storylines provide a way to easily create and present non-linear video stories. The creation of these stories is done using a time-line based editor that mimics the way video stories are composed by film makers. The viewing experience of flexible stories is very similar to viewing a normal video with an introduction of the choice to see more or less of the current topic. This provides a highly variable experience with a simple, smooth and non-intrusive form of user interaction. We also provide a mechanism that lets a story flow smoothly despite the introduction of user interaction.
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DAGNINO, FRANCESCO. "Flexible Coinduction." Doctoral thesis, Università degli studi di Genova, 2021. http://hdl.handle.net/11567/1035050.
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Recursive definitions of predicates by means of inference rules are ubiquitous in computer science. They are usually interpreted inductively or coinductively, however there are situations where none of these two options provides the expected meaning. In the thesis we propose a flexible form of coinductive interpretation, based on the notion of corules, able to deal with such situations.
In the first part, we define such flexible coinductive interpretation as a fixed point of the standard inference operator lying between the least and the greatest one, and we provide several equivalent proof-theoretic semantics, combining well-founded and non-well-founded derivations. This flexible interpretation nicely subsumes standard inductive and coinductive ones and is naturally associated with a proof principle, which smoothly extends the usual coinduction principle.
In the second part, we focus on the problem of modelling infinite behaviour by a big-step operational semantics, which is a paradigmatic example where neither induction nor coinduction provide the desired interpretation. In order to be independent from specific examples, we provide a general, but simple, definition of what a big-step semantics is. Then, we extend it to include also observations, describing the interaction with the environment, thus providing a richer description of the behaviour of programs. In both settings, we show how corules can be successfully adopted to model infinite behaviour, by providing a construction extending a big-step semantics, which as usual only describes finite computations, to a richer one including infinite computations as well. Finally, relying on these constructions, we provide a proof technique to show soundness of a predicate with respect to a big-step semantics.
In the third part, we ez face eez the problem of providing an algorithmic support to corules. To this end, we consider the restriction of the flexible coinductive interpretation to regular derivations, analysing again both proof-theoretic and fixed point semantics and developing proof techniques. Furthermore, we show that this flexible regular interpretation can be equivalently characterised inductively by a cycle detection mechanism, thus obtaining a sound and complete (abstract) (semi-)algorithm to check whether a judgement is derivable. Finally, we apply such results to extend logic programming by coclauses, the analogous of corules, defining declarative and operational semantics and proving ez that eez the latter is sound and complete with respect to the regular declarative model, thus obtaining a concrete support to flexible coinduction.
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Jouy, Franck. "Contribution à la modélisation et à l'identification des défauts géométriques des machines à coordonnées : application au contrôle intégré en atelier flexible." Châtenay-Malabry, Ecole centrale de Paris, 1987. http://www.theses.fr/1987ECAP0031.
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Présentation du contrôle dimensionnel dans les ateliers flexibles. Proposition d'une méthode théorique permettant l'identification de défauts géométriques par la machine elle-même sans intervention d'autres instruments de mesure
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Nylén, Martin, and Daniel Andersson. "En yteffektiv och flexibel kontorsbyggnad : A space saving and flexible office building." Thesis, Linnéuniversitetet, Institutionen för teknik, TEK, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-12668.
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Det kommunalägda fastighetsbolaget Videum AB som hyr ut och förvaltar lokaler på campus i Växjö ska uppföra en ny byggnad med totalytan 5000m2. För att underlätta i projekterandet åt Videum AB har en förfrågan av vilken form på byggnaden som är den mest vinstgivande för företaget undersökts i den här rapporten. I byggnaden ska det finnas kontorslokaler som Videum AB kan hyra ut till andra företag. Kravet är att planlösningen ska vara flexibel och kreativ. Uthyrningsprocenten ska vara högsta möjliga vilket undersöks med hjälp av utvalda nyckeltal. Resultaten från nyckeltalen för varje uppritad byggnadsform jämförs vilket leder till ett slutgiltigt resultat.The communal owned real-estate corporation Videum AB which leases and administrate premises at campus in Växjö shall construct a new building with a surface of 5000m2. A request from Videum AB has been given to us to investigate, in this report, what shape of the building will be the most profitable for the company. The building will be office spaces that Videum AB will rent out to other companies. Requirements are that the planning should be flexible and creative. Renting percentage should be the highest possible, which are examined by selected key figures. The results of the ratios plotted for each building form are compared, leading to a final result.
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Öhman, Tanja. "Flexible touch screen for Rear Seat Entertainment." Thesis, Högskolan i Skövde, Institutionen för teknik och samhälle, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-5328.
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Rapporten beskriver förslag på framtidens ”Rear Seat Entertainment” som baseras på användning av pekskärm, istället för de DVD-baserade TV-skärmar som finns i t ex Volvo S80 i dagsläget. Projektet utfördes som ett examensarbete inom integrerad produktutveckling vid Högskolan i Skövde. Syftet med arbetet var att hitta lösningar som möjliggör användning av ”touchteknik” som kräver armavstånd till displayen. Arbetet delades upp i tre delar där val av pekskärmsenhet (inbyggd eller mobil), positionering av pekskärmen i bilen enligt ergonomiska rekommendationer, samt anpassning för olika stora personer inkluderade barn och utformning av infästningselement har utvecklats. Arbete inleddes med litteraturstudier om interaktion av pekbaserade interface, målgruppsundersökningar, sammanställning av marknadsundersökningar, trendanalyser samt ergonomiska förutsättningar och miljöutvärderingar. För idégenereringen användes kreativa och systematiserade metoder. Urval av idéer skedde i samråd med Volvo och med hjälp av en konceptvalsmatris. Det slutliga konceptet baseras på användningen av mobila pekskärmsenheter. Dessa motsvarar bäst de i dagsläget ställda kriterierna på användning, ekonomi, miljö och flexibilitet. Dessutom erhålls en enklare mjuk- och hårdvaruuppdatering. Positionering av pekskärmar i bilens baksäte gjordes med hjälp av ergonomiska rekommendationer samt databaserade beräkningar och simuleringar. Utformning av infästningselementen anpassades till kravspecifikationen och resulterade i ett fäste som håller fast enheten med hjälp av permanentmagneter som byggs in i ett infästningselement på stolens baksida och ett i fodralet för surfplattan. Arbetet har lett till skärmar som enkelt kan fästas med magnetkrafter.
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Ahlström, Philip, and Olsson Max Bolin. "Flexible Snowboard System." Thesis, Halmstad University, School of Business and Engineering (SET), 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-1692.
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The project, Flexible Snowboard System, has been carried out by the project group independently and is a module developed for snowboarders, ski rentals and ski schools. The problems of today’s solutions are that they cause the user an inconvenient standing position when riding the ski lift or skating the transportation slope, also mounting, adjustments and disassembling of the bindings are time consuming and brings undesired wear to the screws and screw holes. In addition any adjustments require that the user steps out of the bindings and have tools at hand.
Flexible Snowboard System is a universal module which means that it can be assembled with all of today’s snowboards and bindings. The module enables the user to do standing position adjustments with 360 degrees rotation within a 10 centimeters long interval along the snowboard’s length direction and saves time and wear when assembling/disassembling. Flexible Snowboard System includes few components which makes manufacturing and assembling easy and inexpensive. By an easy maneuver the user can adjust the standing position as he or she prefer.
The result of this project is a prototype which firstly eases the snowboard session for the user when the module enables different standing options optimized for conditions like powder, park or piste. Flexible Snowboard System offers a great opportunity for ski rentals and ski schools to increase customer values on account of minimized idle time. The implementation of our product would bring low investment costs because it’s universal and fit the equipment they use today, easy to manufacture and assembly.
The carry through of project Flexible Snowboard Binding has been according to dynamic product development and the project group has had great use of the different methods and tools such as idea generating, model making, evaluation matrixes and testing.
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Asteborg, Marcus. "Flexible Audio Coder." Thesis, KTH, Ljud- och bildbehandling, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-55344.
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As modern communications networks are heterogeneous and, therefore, highly variable, the design of source coders should reflect this network variability. It is desired that source coders are able to adapt instantly to any bit-rate constraint. Source coders that possess this property offer coding flexibility that facilitates optimal utilization of the available communication channel within a heterogeneous network. Flexible coders are able to utilize feedback information and therefore perform an instant re-optimization. This property implies that flexible audio coders are better suited for networks with high variability due to the fact a single configuration of the flexible coder can operate at continuum of bit-rates. The aim of the thesis is to implement a flexible audio coder in a real-time demonstrator (VoIP application) that facilitates instant re-optimization of the flexible coding scheme. The demonstrator provides real-time full-duplex communications over a packet network and the operating bit-rate may be adjusted on the fly. The coding performance of the flexible audio coding scheme should remain comparable to non-flexible schemes optimized at their operating bitrates. The report provides a background for the thesis work and describes the real-time implementation of the demonstrator. Finally, test results are provided. The coder is evaluated by means of a subjective MUSHRA test. The performance of the flexible audio coder is compared to relevant state-of-the-art codecs.
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Zeng, Binqi. "Flexible ditopic receptors." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape16/PQDD_0007/NQ32775.pdf.
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Villar, Nicolas. "Flexible physical interfaces." Thesis, Lancaster University, 2007. http://eprints.lancs.ac.uk/42425/.
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Human-computer interface devices are rigid, and afford little or no opportunity for end-user adaptation. This thesis proposes that valuable new interaction possibilities can be generated through the development of user interface hardware that is increasingly flexible, and allows end-users to physically shape, construct and modify physical interfaces for interactive systems. The work is centred around the development of a novel platform for flexible user interfaces (called VoodooIO) that allows end-users to compose and adapt physical control structures in a manner that is both versatile and simple to use. VoodooIO has two main physical elements: a pliable material (called the substrate), and a set of physical user interface controls, which can be arranged on the surface of the substrate.The substrate can be shaped, applied to existing surfaces, attached to objects and placed on walls and furniture to designate interface areas on which users can spatially lay out controls. From a technical perspective, the design of VoodooIO is based on a novel architecture for user interfaces as networks of controls, where each control is implemented as a network node with physical input and output capabilities. The architecture overcomes the inflexibility that is usually imposed by hard-wired circuitry in traditional interface devices, by enabling individual control elements that can be connected and disconnected ad hoc from a shared network bus. The architecture includes support for a wide and extensible range of control types; fast control identification and presence detection, and an application-level interface that abstracts from low level implementation details and network management processes. The concrete contributions to the field of human-computer interaction include a motivation for the development of flexible physical interfaces, a fully working example of such a technology, and insights gathered from its application and study.
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Glover, Steven James. "Inherently flexible software." Thesis, Durham University, 2000. http://etheses.dur.ac.uk/4531/.
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Software evolution is an important and expensive consequence of software. As Lehman's First Law of Program Evolution states, software must be changed to satisfy new user requirements or become progressively less useful to the stakeholders of the software. Software evolution is difficult for a multitude of different reasons, most notably because of an inherent lack of evolveability of software, design decisions and existing requirements which are difficult to change and conflicts between new requirements and existing assumptions and requirements. Software engineering has traditionally focussed on improvements in software development techniques, with little conscious regard for their effects on software evolution. The thesis emphasises design for change, a philosophy that stems from ideas in preventive maintenance and places the ease of software evolution more at the centre of the design of software systems than it is at present. The approach involves exploring issues of evolveability, such as adaptability, flexibility and extensibility with respect to existing software languages, models and architectures. A software model, SEvEn, is proposed which improves on the evolveability of these existing software models by improving on their adaptability, flexibility and extensibility, and provides a way to determine the ripple effects of changes by providing a reflective model of a software system. The main conclusion is that, whilst software evolveability can be improved, complete adaptability, flexibility and extensibility of a software system is not possible, hi addition, ripple effects can't be completely eradicated because assumptions will always persist in a software system and new requirements may conflict with existing requirements. However, the proposed reflective model of software (which consists of a set of software entities, or abstractions, with the characteristic of increased evolveability) provides trace-ability of ripple effects because it explicitly models the dependencies that exist between software entities, determines how software entities can change, ascertains the adaptability of software entities to changes in other software entities on which they depend and determines how changes to software entities affect those software entities that depend on them.
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VIEIRA, TATIANA ALMEIDA SOUZA COELHO. "FLEXIBLE WORKFLOW EXECUTION." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2005. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=7738@1.
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CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICOSistemas de gerência de workflow geralmente interpretam rigidamente a definição um workflow, não permitindo qualquer tipo de desvio durante a execução. No entanto, existem situaçãoes reais em que usuários devem poder desviar do fluxo pré-definido por diversas razãoes, incluindo falta de informação do valor de um parâmetro e indisponibilidade de recursos necessários á execução. Para alcançar execução flexível, esta tese propõe um mecanismo de tratamento de exceções, voltado para flexibilização, que permite a continuação da execução de uma instância quando antes ela deveria ser momentaneamente interrompida. A proposta concretiza-se como um conjunto de extensões a OWL-S, a linguagem adotada para a definição de workflows, e baseia-se em ontologias de processos e recursos, que oferecem a informação semântica necessária para o funcionamento do mecanismo. A tese apresenta ainda uma semântica operacional para um fragmento de OWL-S e para as extensões propostas, bem como uma arquitetura distribuída para um sistema de gerência de workflows. Em particular, a semântica proporciona uma forma de comportamento transacional para a execução de uma instância de workflow, no sentido de garantir que ou todas as ações da instância terminam corretamente, ou todas são abandonadas.
Workflow management systems usually interpret a workflow definition rigidly, allowing no deviations during execution. However, there are real life situations where users should be allowed to deviate from the prescribed static workflow definition for various reasons, including lack of information about parameter values and unavailability of the required resources. To flexibilize workflow execution, this thesis proposes an exception handling mechanism that allows the execution to proceed when otherwise it would have been stopped. The proposal is introduced as a set of extensions to OWL-S, the language adopted to define workflows, and is based on process and resource ontologies that capture the semantic information needed for the flexibilization mechanism. The thesis also defines an operational semantics for a fragment of OWL-S and the proposed extensions, as well as a distributed architecture for a workflow management system. In particular, the semantics define a form of transactional behavior for the execution of a workflow instance, in the sense that it guarantees that either all actions executed by the instance terminate correctly or they are all abandoned.
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Suh, Eun Suk. "Flexible product platforms." Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/33727.
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Thesis (Ph. D.)--Massachusetts Institute of Technology, Engineering Systems Division, 2005.Includes bibliographical references (leaves 155-162).
The research contributes to the uncertainty management of engineering systems by proposing and demonstrating a way to implement flexible platform strategy to respond to future uncertainties. In today's competitive market, where market segments are becoming more fragmented, pressure to develop and market diverse sets of products is increasing. To meet such market needs and reduce production cost at the same time, product platform strategy has been implemented in several different industries. Using a core set of common platform elements and variant-specific unique elements, a family of products can be produced to satisfy various market segments. However, the growing cost of platform development and undesired side effects of the strategy (e.g. performance tradeoff, cannibalization) is forcing companies to design their platforms with flexibility, so they can accommodate product variants, differentiate these variants, and be economically flexible to respond to specified future uncertainties. This thesis introduces a design process to architect flexible product platforms. The proposed process is demonstrated in two automotive application case studies.
(cont.) In the first case study, a vehicle floor pan is designed to satisfy two different length requirements, while being economically robust to future specification change and component demand. The second case study investigates a vehicle platform, where the flexible body in white (BIW) platform is designed for a family of three vehicle variants through identification of critical elements subset. Results showed that the flexible BIW platform is less profitable than the inflexible BIW platform, but when the degree of future uncertainty increases, the flexible design eventually becomes more profitable. This research provides additional examples that yet again confirms the general proposition "flexibility gains value as the degree of uncertainty increases."
by Eun Suk Suh.
Ph.D.
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Music, Omer. "Flexible asymmetric spinning." Thesis, University of Cambridge, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.609554.
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Barker, Adam. "Flexible service choreography." Thesis, University of Edinburgh, 2007. http://hdl.handle.net/1842/8980.
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Service-oriented architectures are a popular architectural paradigm for building software applications from a number of loosely coupled, distributed services. Through a set of procedural rules, workflow technologies define how groups of services coordinate with one another to achieve a shared task. A problem with workflow specifications is that often the patterns of interaction between the distributed services are too complicated to predict and analyse at design-time. In certain cases, the exact patterns of message exchange and the concrete services to call cannot be predicted in advance, due to factors such as fluctuating network load or the availability of services. It is a more realistic assumption to endow software components with the ability to make decisions about the nature and scope of their interactions at runtime. Multiagent systems offer a complementary paradigm: building software applications from a number of self interested, autonomous agents. This thesis presents an investigation into fusing the agency and service-oriented architecture paradigms, in order to facilitate flexible, workflow composition. Our approach offers an agent-based solution to service choreography and is founded on the concept of shared interaction protocols. By adopting an agent-based approach to service choreography, active autonomous agents can utilise the typically passive service-oriented architectures, found in Internet and Grid systems. In contrast with statically defined, centralised service orchestrations, decentralised agents can perform service choreography at runtime, allowing them to operate in scenarios where it is not possible to define the pattern of interaction in advance. Application to real scenarios is a driving factor behind this research. By working closely with a number of active Grid projects, namely AstroGrid and the Large-Synoptic Survey Telescope (LSST), a concrete set of requirements for scientific workflow have been derived, based on realistic science problems. This research has resulted in the MultiAgent Service Choreography (MASC) language to express scientific workflow, methodology for system building and a software framework which performs agent based Web service choreography, in order to enact distributed e-Science experiments. Evaluation of this thesis is conducted through case study, applying the language, methodology and software framework to solve a motivating set of workflow scenarios.
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Загулов, Станіслав Русланович. "Flexible integrated circuits." Thesis, Київський національний університет технологій та дизайну, 2020. https://er.knutd.edu.ua/handle/123456789/15297.
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Cesario, Wander Oliveira. "Synthèse architecturale flexible." Grenoble INPG, 1999. http://www.theses.fr/1999INPG0116.
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Le sujet de cette these est le developpement d'une nouvelle methodologie de synthese basee sur une approche interactive et flexible concue pour l'exploration de l'espace des solutions. C'est le concepteur qui est au centre du processus de creation, il a la possibilite d'adapter les techniques et les methodes de conception a l'application et il est guide par des estimations de haute fidelite pour prendre des decisions pendant la phase de synthese. La flexibilite concerne l'architecture cible et le flot de conception. La flexibilite de l'architecture cible offre la possibilite de choisir le style des interconnexions selon le facteur de partage des ressources de chaque destination de donnees. De nouvelles techniques pour l'allocation et l'affectation des interconnexions ont ete employees. Elles utilisent des directives d'optimisation visant a reduire le nombre de cellules. L'existence d'un chevauchement de fonctionnalite entre la synthese comportementale et la synthese rtl a permis de nouvelles formes d'integration entre les deux etapes. Un flot de synthese qui profite de ce chevauchement est presente. Les concepteurs peuvent ainsi eviter des etapes de synthese inutiles ou non-optimales en fonction de l'application et les criteres d'optimisation. Une nouvelle methodologie pour l'evaluation de performance a partir d'une description de niveau systeme est aussi presentee. Cette methodologie est basee sur un modele de performance executable decrit dans un langage de specification au niveau systeme. Le modele tient compte du partitionnement logiciel/materiel, des affectations des multiprocesseurs et du choix des protocoles de communication. Les resultats preliminaires montrent que ce modele peut atteindre une bonne precision et une bonne fidelite. Toutes ces methodologies et techniques de conception ont ete developpes dans le cadre de l'environnement de conception conjointe appele music.
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Sänger, Nicolas [Verfasser]. "Elemente für die Dynamik flexibler Mehrkörpersysteme. Elements for flexible multibody dynamics / Nicolas Sänger." Siegen : Universitätsbibliothek Siegen, 2011. http://d-nb.info/1017180997/34.
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Campeau, Oliver. "Flexibla affärssystem via Contextual Design En fallstudie : Flexible business systems using Contextual Design." Thesis, Uppsala universitet, Institutionen för informationsteknologi, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-364414.
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In current administrative support systems, the primary focus is to create products and work flows that automate as much of the work loadas possible. This usually results in systems that enable fast and effective work flows to manage most situations, but have a side effect of lacking flexibility to manage the remainder of thesituations in an efficient way. The purpose is to examine if the method Contextual Design can be used to create a highly useful systemwith a collaboration between automated and manual work flows to beable to tend to all situations. This was examined by using Contextual Design inquiry on a case study where all the subjects of the organization studied were interviewed at their physical workplace. The result of the interviews was used to redesign the work flows of the company, where some processes were fully automated, for example the organizations invoicing function. Other work flows now have some automation, for example the organizations ordering function, where the system now assists with a number of steps during the process and where the remainder is handled manually by the staff. Contextual Design works well for the purpose of creating a system of this kind,mostly due to the impact the users input and needs have on the end system. However, the method has high demands on resources and is expected to work better in smaller organizations.
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Solatges, Thomas. "Modélisation, conception et commande de robots manipulateurs flexibles. Application au lancement et à la récupération de drones à voilure fixe depuis un navire faisant route." Thesis, Toulouse, ISAE, 2018. http://www.theses.fr/2018ESAE0012/document.
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Les robots manipulateurs sont généralement des machines rigides, conçues pour que leurflexibilité ne perturbe pas leurs mouvements. En effet, des flexibilités mécaniques importantesdans la structure d’un système introduisent des degrés de liberté supplémentaires dont le comportementest complexe et difficile à maîtriser. Cependant, la réduction de la masse d’un systèmeest bénéfique du point de vue des coûts, de la performance énergétique, de la sécurité et des performancesdynamiques. Afin de faciliter l’accès aux nombreux avantages d’une structure légèremalgré la présence de fortes flexibilités, cette thèse porte sur la modélisation, la conception et lacommande de robots manipulateurs flexibles. Elle est motivée par le projet YAKA, dont l’applicationest le lancement et la récupération de drones à voilure fixe depuis un navire faisant route.Cette application nécessite une importante dynamique sur un vaste espace de travail, bien au-delàdes spécifications des robots rigides classiques. Les outils de modélisation, de conception et decommande proposés prennent en compte la flexibilité des segments et des articulations, pour unnombre quelconque de degrés de liberté et de segments flexibles. Le modèle dynamique flexibleest obtenu par le formalisme de Lagrange, les poutres flexibles sont représentées par le modèled’Euler-Bernoulli. Le schéma de commande proposé se décompose en une inversion de modèledynamique rigide et un bloc de précommande par Input Shaping adapté aux robots manipulateursflexibles. Les outils de conception proposés permettent de baser le processus de conceptionsur des performances prédites du système complet muni de ses actionneurs et de son contrôleuravec une simulation réaliste. Les validations expérimentales effectuées sur le robot YAKA permettentde valider la pertinence de la démarche suivie. Les résultats du projet YAKA confirment lafaisabilité de la mise en oeuvre d’un robot flexible de grande envergure et à forte dynamique dansun contexte industriel, en particulier pour le lancement et la récupération d’un drone à voilurefixe depuis un navire faisant routeRobot manipulators are generally stiff machines, designed in a way that flexibility does not affecttheir movements. Indeed, significant flexibility introduces additional degrees of freedom witha complex behavior. However, reducing the mass of a system allows for costs, performance, andsafety improvements. In order to allow those benefits despite important flexibility, this thesis focuseson modeling, design and control of flexible robot manipulators. It is motivated by the YAKAproject, which aims at developing a robot to launch and recover fixed wing UAVs from a movingship. It implies reaching very high dynamics on a large workspace, way beyond the specificationsof common rigid robots. The proposed tools for modeling, design and control allow for taking intoaccount both joint and link flexibility, for any number of degrees of freedom and flexible links.The elastodynamic model is obtained with Lagrange principle, each flexible link being representedwith one ormany Euler-Bernouilli beams. The proposed control scheme uses a nonlinear rigiddynamic inversion and extends classical Input Shaping techniques to flexible robot manipulators.The proposed design tools allow for performance prediction of the system including its actuatorsand controllers thanks to a realistic simulation. Experiments conducted with the YAKA robot validatedthe proposed approach. The results of the YAKA project confirmed the feasibility of usinga large scale, highly dynamic flexible robot in an industrial context, in particular for UAVs launchand recovery operations from amoving ship
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Gueye, Mouhamadou. "Magnetic thin films on flexible substrates : magnetomechanical study by ferromagnetic resonance." Thesis, Sorbonne Paris Cité, 2017. http://www.theses.fr/2017USPCD007/document.
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Les films minces déposés sur des substrats flexibles ont été intensivement étudiés ces dernières années en raison de leur nombreuses applications en électronique flexible. Depuis peu, l'électronique flexible est étendu aux matériaux magnétiques conduisant ainsi au domaine émergeant de la magnéto-électronique flexible actuellement à l'avant garde des sujets de recherche de la spintronique. Ce travail de thèse est dédié à l'étude des propriétés magnéto-mécaniques de films minces magnétiques (Ni, NiFe, Co2FeAl, CoFeB, FeCuNbSi) sur des substrats flexibles. Les analyses structurales ont montré que les films de Ni et de CFA sont polycristallins non-texturés ; le CFB est amorphe. Par conséquent, les propriétés élastiques et magnéto-élastiques de ces films sont considérées comme étant isotropes. Une technique basée sur une utilisation conjointe d'essai mécanique, la résonance ferromagnétique (FMR) et la corrélation d'images numériques (CIN) a été développée pour étudier les propriétés magnéto-mécaniques de films minces sur substrats flexibles. A l'aide de cette méthode, il est possible de suivre l'évolution de l'anisotropie résiduelle omniprésente dans les films magnétiques sur substrats flexibles. Cette anisotropie est liée aux propriétés mécaniques contrastées lorsqu'on dépose un film mince rigide (grand module d'Young) sur un substrat flexible (petit module d'Young). L'effet du recuit sur les propriétés élastiques et magnéto-élastiques a été soigneusement étudié dans le film CFB validant ainsi l'intérêt porté à ses alliages pour des applications en spintronique. Enfin, la résonance ferromagnétique est employé en balayage en fréquence pour suivre la variation de la direction de l'aimantation en fonction des déformations induites par l'application de tension électrique sur l'actionneur piézoélectrique. Un retournement de 90° de la direction de l'aimantation dans le film Co2FeAl sur substrat flexible de Kapton® est observéThin films deposited on flexible substrates have been widely studied in the last decades due to the numerous applications in flexible electronics. Recently, flexible electronics have been extended to magnetic materials leading to the so-called emerging feld of flexible magnetoelectronics which is actually at the cutting-edge of spintronics research topics.This thesis is devoted to the study magnetomechanical properties of magnetic thin films (Ni, NiFe, Co2FeAl, CoFeB, FeCuNbSi) on flexible substrates. Structural analysis have 130 Abstracts hown that the Ni and CFA films are found to be polycrystalline with no strong preferred orientations ; the CFB film is amorphous. Consequently, the elastic and magnetoelastic properties are isotropic. For the study of the magnetomechanical properties, a set-up based on a jointly use of deformation test (bending or piezoactuation), ferromagnetic resonance (FMR) and digital image correlation (DIC) have been developped. Thanks to this method, it is possible to follow the evolution of the inescapable residual anisotropy encountered in magnetic thin films on flexible substrates under deformation and to determine the effective coefficient of magnetostriction of the films (sometimes unknown).This residual anisotropy is ascribed to contrasted mechanical strength when a sti thin film is deposited on a compliant substrate. The effect of the annealing temperature on the elastic and magnetoelastic have been studied carefully in CFB validating then theinterest on such alloys for spintronics applications. Finally, we have employed FMR inits sweep frequency mode to study the effective evolution of magnetization direction as function of the voltage-induced strains. A 90-degree magnetization rotation in Co2FeAl thin film on Kapton® polyimide substrate is observed
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Zuther, Magnus. "Flexible Konfiguration von Betreibernetzwerken /." Aachen : Shaker, 2002. http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&doc_number=010233886&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA.
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Conrad, Jan. "Flexible User Interface - FLUSI." Thesis, Växjö University, Faculty of Mathematics/Science/Technology, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:vxu:diva-410.
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The cellular phone network has been increasing rapidly during the last years. For many people the mobile phone has become an every day gadget with a wide performance and functional range. The usage of technologies like GPRS, HSCSD, EDGE and UMTS as well as the bandwidth of networks and consequently the connectivity of the phones has also increased persistently. Coming along with that, three technologies, which are ubiquitous or pervasive computing, mobile and wireless networks and location-based technologies, are making rapid progress.
The aim of this thesis is to offer an architecture for a location-based user interface in the intersection of the three technologies mentioned above. The system should work with a minimum of special hardware requirement. Not to overload the user with information, the user interface should be adaptable, context-aware and location-based. The context-data should remain extendible and adaptable.
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Obidzinski, Marie. "Economie d'un droit flexible." Phd thesis, Université Nancy II, 2006. http://tel.archives-ouvertes.fr/tel-00130956.
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Un droit flexible est un droit qui laisse une marge de discrétion au juge. Il est caractérisé par des règles générales, ou “incomplètes”. Cette marge de discrétion a un coût : la diminution de l'information donnée par le droit aux agents. Dans un contexte où la complexité du droit augmente de manière exponentielle, la question de la rationalité d'un droit flexible se pose. Autrement dit, les règles de droit doivent-elles être incomplètes, c'est-à-dire ambiguës, ou doivent-elles spécifier l'ensemble des contingences ?Cette thèse s'insère dans la littérature de l'analyse économique des caractéristiques des règles en analysant le problème sous l'angle de la production du droit.
Tout d'abord, un traitement théorique de la formulation des règles à l'aide de la théorie des options réelles est présenté dans le but de participer à la compréhension de l'existence de règles incomplètes dans des environnements complexes et innovants.
La question du fondement de l'intervention de l'autorité publique est ensuite posée. Le choix entre un régime flexible, fondé sur l'occurrence du préjudice, et un régime rigide, fondé sur la détection de l'activité, dépend de l'information du législateur et des agents sur le risque.
L'influence du degré de précision des règles sur la résolution à l'amiable des litiges est analysée. Cette étude nous permet de justifier en partie la production de droit soft par les parties privées. Un droit précis facilite la résolution des litiges.
Finalement, la notion de flexibilité est appliquée à la controverse sur l'efficacité de l'harmonisation du droit comme solution à la concurrence des juridictions. Le problème du droit d'asile est considéré. La production d'un droit d'asile européen flexible apparaît comme une solution préférable pour les réfugiés. Elle permet de limiter l'effet d'externalité tout en laissant une marge de manoeuvre aux Etats : une partie de la production du droit est décentralisée. Dans ce cadre, la justification de l'incomplétude des règles provient des disparités entre les Etats. Cette disparité crée une demande pour un droit flexible.
La conclusion est nuancée ; l'incomplétude des règles de droit se justifie lorsque les circonstances varient fortement et lorsque le domaine est innovant. Autrement, la précision des règles informe les agents : elle est donc nécessaire dans un contexte de sous ou sur estimation du risque et comme aide à la résolution des litiges.
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Scholz, Torsten. "Flexible Modellierung kategorialer Responsevariablen." Diss., lmu, 2004. http://nbn-resolving.de/urn:nbn:de:bvb:19-20585.
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Montgomery, Darcy Thomas. "Milling of flexible structures." Thesis, University of British Columbia, 1990. http://hdl.handle.net/2429/29689.
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Current manufacturing research aims at increasing productivity by optimal selection of process parameters. This is accomplished by understanding the fundamental physics of individual manufacturing processes.
In this thesis, peripheral milling of very flexible cantilevered plates is studied. The static and dynamic deflections of the plate under periodic milling forces are modelled. A new dynamic cutting force model is developed which considers five discrete zones of relative motion between the tool and the workpiece. The kinematics of both milling and vibratory motions are modelled, which is an original research contribution in this area. It is shown that the penetration of the tool into the workpiece during vibratory cutting has a strong influence on the damping and stiffness characteristics of the milling process.
A structural model of a discontinuous cantilevered plate is determined using the finite element method. A reduced order structural model at the tool-workpiece contact zone is implemented for discrete time response analysis of the plate under cutting force excitations during milling. The closed loop dynamic behaviour of the system is modelled and taken into account in the analysis. Simulations of plate machining are compared with experimental results. A model of the surface finish generation mechanism is deduced from the analysis and experimental results.
Applications of this research include peripheral milling of integral jet engine impellers, computer disk drives and other flexible mechanical components.Applied Science, Faculty of
Mechanical Engineering, Department of
Graduate
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Jong, Hayco Alexander de. "Flexible heterogeneous software systems." [S.l : Amsterdam : s.n.] ; Universiteit van Amsterdam [Host], 2007. http://dare.uva.nl/document/39606.
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Vafin, Renat. "Towards flexible audio coding /." Stockholm, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-71.
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Schweiger, Daniel L. "Instrumentation of flexible pavement." Ohio : Ohio University, 1995. http://www.ohiolink.edu/etd/view.cgi?ohiou1178911279.
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Xu, Hua. "Scheduling with flexible parallelism." Diss., Georgia Institute of Technology, 1992. http://hdl.handle.net/1853/23388.
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Seng, Shay Ping. "Adaptive flexible instruction processors." Thesis, Imperial College London, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.406853.
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McLachlan, Donald Stuart. "Flexible assembly cell manipulator." Thesis, University of Hull, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.296278.
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Schneemann, Andreas, Volodymyr Bon, Inke Schwedler, Irena Senkovska, Stefan Kaskel, and Roland A. Fischer. "Flexible metal–organic frameworks." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2014. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-149990.
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Advances in flexible and functional metal–organic frameworks (MOFs), also called soft porous crystals, are reviewed by covering the literature of the five years period 2009–2013 with reference to the early pertinent work since the late 1990s. Flexible MOFs combine the crystalline order of the underlying coordination network with cooperative structural transformability. These materials can respond to physical and chemical stimuli of various kinds in a tunable fashion by molecular design, which does not exist for other known solid-state materials. Among the fascinating properties are so-called breathing and swelling phenomena as a function of host–guest interactions. Phase transitions are triggered by guest adsorption/desorption, photochemical, thermal, and mechanical stimuli. Other important flexible properties of MOFs, such as linker rotation and sub-net sliding, which are not necessarily accompanied by crystallographic phase transitions, are briefly mentioned as well. Emphasis is given on reviewing the recent progress in application of in situ characterization techniques and the results of theoretical approaches to characterize and understand the breathing mechanisms and phase transitions. The flexible MOF systems, which are discussed, are categorized by the type of metal-nodes involved and how their coordination chemistry with the linker molecules controls the framework dynamics. Aspects of tailoring the flexible and responsive properties by the mixed component solid-solution concept are included, and as well examples of possible applications of flexible metal–organic frameworks for separation, catalysis, sensing, and biomedicine.
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Rojratsirikul, Pinunta. "Aerodynamics of flexible membranes." Thesis, University of Bath, 2010. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.527135.
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Membrane wings are used both in nature and small aircraft as lifting surfaces. For these low Reynolds number applications, separated flows are common and are the main sources of unsteadiness. Adaptability of the membrane wing is known to improve the vehicle performance; and membrane compliancy in animal wings such as bats contributes significantly to their astonishing flights. Yet, the aerodynamic characteristics of the membranes are still largely unknown. An experimental study of flexible membranes at low Reynolds numbers was undertaken. Two-dimensional membrane aerofoils were investigated, with particular focus on the unsteady aspects. Membrane deformation, flow fields and fluid-structure interaction were examined over a range of angles of attack and freestream velocities. A comprehensive study of the effect of membrane pre-strain and excess length was carried out. Low aspect ratio membrane wings were investigated for rectangular and nonslender delta wings. The amplitude and mode of membrane vibration are found to be dependent mainly on the location and the unsteadiness level of the shear layer. The results indicate a strong coupling of unsteady flow with the membrane oscillation. With increasing Reynolds number, the separated shear layer becomes more energetic and closer to the surface. The membrane not only has smaller size of the separation region compared to a rigid aerofoil, but also excites the roll-up of large vortices which might lead to delayed stall. The membrane aerofoils with excess length exhibit higher vibration modes, earlier roll-up and smaller separated region, compared to the ones with pre-strain. This smaller separated region delays the onset of membrane vibrations to a larger incidence. For the low aspect ratio membrane wings, the combination of tip vortices and leading-edge vortex shedding results in a mixture of streamwise and spanwise vibrational modes. The flexibility benefits the rectangular wing more than the delta wing by increasing the maximum normal force and the force slope by a larger amount. Similar to the two-dimensional membrane aerofoils, the Strouhal numbers of the oscillations are on the order of unity, and there is a coupling with the wake instabilities in the post-stall region. Stronger tip vortices on membrane wings contribute significantly to total lift enhancement.
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Fahey, Nicholas J. S. B. Massachusetts Institute of Technology. "A flexible crampon design." Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/32975.
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Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2005.Includes bibliographical references (leaf 16).
The design of crampons is studied and a new, more comfortable, flexible crampon design is proposed. A brief history of crampons is provided and then the current state of crampon design is discussed. Two major problems in modern crampons were identified. The first big problem was that the crampons are extremely hard to use and adjust especially in cold, wet conditions. The second problem was the comfort of the crampons on the hikers feet. While this issue may seem somewhat trivial, when hikers are on a multi-day expedition they need to keep their feet in the best possible condition. Therefore, a crampon design that makes use of larger safety straps operable by a person wearing gloves is proposed. The center of the crampon itself is flexible, being made from spring steel. This allows the crampon to flex with a hiker's foot, thereby improving walking comfort.
by Nicholas Fahey.
S.B.
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Pruessner, L. D. "Waves on flexible surfaces." Thesis, University College London (University of London), 2013. http://discovery.ucl.ac.uk/1385152/.
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The overall concern of the thesis is with fluid-body interaction in the sense of the fluid dynamics of external ow past a bluff body or other bounding surface whose shape responds to the flow properties. The work is motivated for the most part by industrial connections. Neither the flow nor the body shape is known at the outset. Indeed the major task described in the thesis is to predict the flow and the shape with a special emphasis being on the interactive behaviour inferred at relatively large flow rates. Allied with the above is the application of novel mathematical modelling, analysis and computation. The thesis addresses in turn some of the detail in the motivation for the work, the focus of the study, the most relevant background literature, the aim of the investigations and then the rest of the thesis. The latter part centres on triple-deck theory and related theory, linear and nonlinear phenomena, two-dimensional and three-dimensional responses, steady and unsteady interactions, and new kinds of resonances that are found, accompanied by typical real-world values of the parameters involved in the controlling systems.
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Seger, Mario. "Alternierende Telearbeit - Flexible Grenzen." Phd thesis, [S.l. : s.n.], 2005. https://tuprints.ulb.tu-darmstadt.de/535/1/ATFG2005.pdf.
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Alternierende Telearbeit ist insbesondere in Deutschland und Europa eine noch junge Form der Arbeits(zeit)organisation. Neben entsprechenden empirischen Befunden – 58,1% der Erwerbstätigen äußern Interesse an der Organisationsform der alternierenden Telearbeit – deuten aber auch eine Vielzahl miteinander verknüpfter individueller, sozialer, gesellschaftlicher, ökonomischer sowie technologischer Faktoren und Trends auf eine Chance der Etablierung dieses Arbeits(zeit)modells hin: · Ansteigendes Bildungsniveau · Steigender Bedarf an qualifizierten Fachkräften · Permanente Zuwächse bei der außerhäuslichen Erwerbstätigkeit von Frauen · Diversifizierungstendenzen der weiblichen und männlichen Rollen · Überalterung der Gesellschaft und die Notwendigkeit einer steigenden Erwerbsquote · Wieder zu erwartender und sozialpolitisch erforderlicher Anstieg der Geburtenraten · Wohlstandssättigung und zunehmende Bedeutung immaterieller Anreizstrukturen · Weiterhin wachsender Bedarf der beruflichen und privaten Mobilität · Stetige Ausbreitung von vernetzungsfähiger Informations- und Kommunikationstechnologie · Etc. Ganz im Gegensatz zu der zu erwartenden Bedeutung der alternierenden Telearbeit ist das momentane Ausmaß der wissenschaftlichen Beschäftigung mit der Telearbeit, insbesondere mit der alternierenden Telearbeit, als in den Anfängen zu bezeichnen. Das gilt besonders für den Bereich der empirischen Untersuchungen zu diesem Arbeits(zeit)modell, die sich mehr oder weniger auf eine handvoll Studien beschränken. Darüber hinaus weisen bisherige Studien nur selten höhere Fallzahlen auf und beschränken sich in ihrer Perspektive praktisch ausschließlich auf die alternierend Beschäftigten. Dem gegenüber erwies sich die Möglichkeit der wissenschaftlichen Begleitung des Modellversuchs „Verbesserung der Vereinbarkeit von Beruf und Familie für Frauen und Männer durch alternierende Telearbeit“ in der Hessischen Landesverwaltung in quantitativer wie auch in qualitativer Hinsicht als äußerst fruchtbar. Neben 141 alternierend Beschäftigten konnten 21 konventionell beschäftigte Kolleginnen und Kollegen der Alternierenden, 65 Vorgesetzte der Alternierenden und 35 Beschäftigtenvertreter/innen der Alternierenden in die Analyse dieses Modellversuches einbezogen werden. Inhaltlich erstreckte sich die Untersuchung des hessischen Modellversuches auf dieser Basis über das ganze Spektrum der Bedingungen und Auswirkungen von alternierender Telearbeit. Im Mittelpunkt des Interesses stand die Wirkung dieses Arbeits(zeit)modells auf die einzelnen davon betroffenen Individuen, der Einfluss auf die Beziehungen zwischen den involvierten Personen und auch die Auswirkungen auf die Organisation im Ganzen. Aus diesen ganzheitlichen Zusammenhängen und aus dieser Qualität der zu erlangenden Erkenntnisinteressen ergab sich letztlich die Gelegenheit einer mikro- und makrosoziologischen Betrachtungsperspektive der Chancen und Risiken dieses Arbeits(zeit)modells. Im organisationsinternen Bereich, d. h. innerhalb der Hessischen Landesverwaltung und der konkreten Ausgestaltung der beruflichen und familiären Beziehungen, lag der Schwerpunkt des Interesses auf folgenden Aspekten: · Vereinbarkeit von Beruf und Familie für Frauen und Männer, insbesondere Kinderbetreuung / Konsequenzen im privaten Umfeld · Funktionsübergreifende Zusammenarbeit, Effizienzsteigerung und Kostenreduktion · Arbeitszufriedenheit am Modellprojekt teilnehmender Beschäftigter und arbeitspsychologische Auswirkungen im Arbeitsumfeld · Arbeitsplatzausstattung unter technischen, räumlichen und Kostenaspekten · Entwicklung von Kommunikationsbeziehungen · Neue Formen der Arbeitszeitgestaltung und ihre Eignung für die Förderung von Teilzeitarbeit / Telearbeit · Weiterbildungsmöglichkeiten, zukunfts- und auf alternierende Telearbeit bezogen · Zuschnitt von Arbeitsplätzen, insbesondere Mischarbeitsplätzen, hinsichtlich Telearbeit · Vorgesetztenverhalten im Zusammenhang mit alternierender Telearbeit sowie Zielvereinbarung und neue Formen der Ergebniskontrolle Zusammengefasst bestand das Forschungsziel darin, herauszufinden, ob alternierende Telearbeit für Frauen und Männer eine Verbesserung der Vereinbarkeit von Beruf und Familie mit sich bringt, ob dieses Arbeits(zeit)modell für die insgesamt involvierten Personen und die Hessische Landesverwaltung als Arbeitgeberin in irgend einer Form Nachteile hat und in welcher Weise das berufliche wie private Umfeld gestaltet sein sollte, um erfolgreich alternierende Telearbeit praktizieren zu können. Die ökonomischen sowie gesellschafts- und geschlechterpolitischen Potentiale der alternierenden Telearbeit, die sich im Rahmen der fortschreitenden Umsetzung und Untersuchung des hessischen Modellversuches herausstellten, führten schließlich zu einer Erweiterung der Perspektive in Richtung der o. g. makrosoziologischen Betrachtung. Im Mittelpunkt dieser Analyse standen drei Themen. Zum Ersten ist das, in der Auseinandersetzung mit der Theorie der „kulturellen Modernisierungspfade von Geschlechter-Arrangements“ und dem Potential der alternierenden Telearbeit für eine Verbesserung der Vereinbarkeit von Beruf und Familie, die Frage nach dem Beitrag des Arbeits(zeit)modells zu der Re-Konstruktion gleichwertiger kultureller Geschlechter. Zum Zweiten ist zu diskutieren, inwiefern die ökonomischen, organisatorischen und arbeitspsychologischen Potentiale der alternierenden Telearbeit im Zusammenhang mit der Erörterung von Reengineering-Ansätzen und dem Organisationsentwicklungskonzept eine neue Option im Feld der Organisationsentwicklungsstrategien eröffnen. Der Dritte in die Betrachtung einbezogene makrosoziologische Aspekt bezieht sich auf das, je nach Gewichtung, mehr oder weniger starke Einflusspotential der ökonomischen und sozialen Wirkungen von alternierender Telearbeit auf die gesellschaftliche Entwicklung. Unter diesem Gesichtspunkt stellt sich letztlich die Frage, ob die alternierende Telearbeit lediglich als konsequente Weiterentwicklung des informationalisierten industriellen Kapitalismus zu begreifen ist oder ob sich durch dieses Arbeits(zeit)modell, im Hinblick auf die zukünftigen Herausforderungen der gesellschaftlichen Entwicklung, auch die Möglichkeit eröffnet, den informationalisierten industriellen Kapitalismus für eine Humanisierung der Arbeits- und Lebenswelt auf der Basis gleichwertiger kultureller Geschlechter zu instrumentalisieren. Die Annäherung an das Thema alternierende Telearbeit und die aufgezeigten Forschungsfragen erfolgt zunächst über die Erläuterung der Definitionen von Telearbeit sowie ihrer historischen und gegenwärtig quantitativen Entwicklung. Bevor dann der Charakter, die Konditionen und die Effekte dieses Arbeits(zeit)modells am Beispiel des Modellversuchs der Hessischen Landesverwaltung analysiert werden, ist zunächst noch auf die Kongruenzen und Differenzen zwischen alternierender Telearbeit und Reengineering sowie auf den Einfluss von Technik und Kultur in Bezug auf die Destruktion und Re-Konstruktion der Vereinbarkeit von Beruf und Familie einzugehen. Den Abschluss der Untersuchung der alternierenden Telearbeit bilden schließlich die zusammenfassenden Betrachtungen der Auswirkungen dieses Arbeits(zeit)modells auf die Zusammenhänge zwischen Arbeit und Familie, Arbeit und beruflichem Umfeld und auch Arbeit und Gesellschaft.
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Schweiger, Daniel J. "Instrumentation of flexible pavement." Ohio University / OhioLINK, 1995. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1178911279.
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Villarreal, Seth. "EXAMINING FLEXIBLE BIOLOGICAL STRUCTURES." Case Western Reserve University School of Graduate Studies / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=case1414772850.
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Sobani, Masoud. "Smart Flexible Anticorrosion Coating." University of Akron / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=akron1541778536930059.
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Rosa, Tiago Miguel Simões. "Flexible LTE user equipment." Master's thesis, Universidade de Aveiro, 2017. http://hdl.handle.net/10773/23753.
Full textAbstract:
Mstrado em Engenharia Eletrónica e TelecomunicaçõesAs redes móveis estão em constante evolução. A geração atual (4G) de redes celulares de banda larga e representada pelo standard Long Term Evolution (LTE), definido pela 3rd Generation Partnership Project (3GPP). Existe uma elevada procura/uso da rede LTE, com um aumento exponencial do número de dispositivos móveis a requerer uma ligação à Internet de alto débito. Isto pode conduzir à sobrelotação do espetro, levando a que o sinal tenha que ser reforçado e a cobertura melhorada em locais específicos, tal como em grandes conferências, festivais e eventos desportivos. Por outro lado, seria uma vantagem importante se os utilizadores pudessem continuar a usar os seus equipamentos e terminais em situações onde o acesso a redes 4G é inexistente, tais como a bordo de um navio, eventos esporádicos em localizações remotas ou em cenários de catástrofe, em que as infraestruturas que permitem as telecomunicações foram danificadas e a cobertura temporária de rede pode ser decisiva em processos de salvamento. Assim sendo, existe uma motivação clara por trás do desenvolvimento de uma infraestrutura celular totalmente reconfigurável e que preencha as características mencionadas anteriormente. Uma possível abordagem consiste numa plataforma de rádio definido por software (SDR), de código aberto, que implementa o standard LTE e corre em processadores de uso geral (GPPs), tornando possível construir uma rede completa investindo somente em hardware - computadores e front-ends de radiofrequência (RF). Após comparação e análise de várias plataformas LTE de código aberto foi selecionado o OpenAirInterface (OAI) da EURECOM, que disponibiliza uma implementação compatível com a Release 8.6 da 3GPP (com parte das funcionalidades da Release 10). O principal objectivo desta dissertação é a implementação de um User Equipment (UE) flexível, usando plataformas SDR de código aberto que corram num computador de placa única (SBC) compacto e de baixa potência, integrado com um front-end de RF - Universal Software Radio Peripheral (USRP). A transmissão de dados em tempo real usando os modos de duplexagem Time Division Duplex (TDD) e Frequency Division Duplex (FDD) é suportada e a reconfiguração de certos parâmetros é permitida, nomeadamente a frequência portadora, a largura de banda e o número de Resource Blocks (RBs) usados. Além disso, é possível partilhar os dados móveis LTE com utilizadores que estejam próximos, semelhante ao que acontece com um hotspot de Wi-Fi. O processo de implementação é descrito, incluindo todos os passos necessários para o seu desenvolvimento, englobando o port do UE de um computador para um SBC. Finalmente, a performance da rede é analisada, discutindo os valores de débitos obtidos.
Mobile networks are constantly evolving. 4G is the current generation of broadband cellular network technology and is represented by the Long Term Evolution (LTE) standard, de ned by 3rd Generation Partnership Project (3GPP). There's a high demand for LTE at the moment, with the number of mobile devices requiring an high-speed Internet connection increasing exponentially. This may overcrowd the spectrum on the existing deployments and the signal needs to be reinforced and coverage improved in speci c sites, such as large conferences, festivals and sport events. On the other hand, it would be an important advantage if users could continue to use their equipment and terminals in situations where cellular networks aren't usually available, such as on board of a cruise ship, sporadic events in remote locations, or in catastrophe scenarios in which the telecommunication infrastructure was damaged and the rapid deployment of a temporary network can save lives. In all of these situations, the availability of exible and easily deployable cellular base stations and user terminals operating on standard or custom bands would be very desirable. Thus, there is a clear motivation for the development of a fully recon gurable cellular infrastructure solution that ful lls these requirements. A possible approach is an open-source, low-cost and low maintenance Software-De ned Radio (SDR) software platform that implements the LTE standard and runs on General Purpose Processors (GPPs), making it possible to build an entire network while only spending money on the hardware itself - computers and Radio-Frequency (RF) front-ends. After comparison and analysis of several open-source LTE SDR platforms, the EURECOM's OpenAirInterface (OAI) was chosen, providing a 3GPP standard-compliant implementation of Release 8.6 (with a subset of Release 10 functionalities). The main goal of this dissertation is the implementation of a exible opensource LTE User Equipment (UE) software radio platform on a compact and low-power Single Board Computer (SBC) device, integrated with an RF hardware front-end - Universal Software Radio Peripheral (USRP). It supports real-time Time Division Duplex (TDD) and Frequency Division Duplex (FDD) LTE modes and the recon guration of several parameters, namely the carrier frequency, bandwidth and the number of LTE Resource Blocks (RB) used. It can also share its LTE mobile data with nearby users, similarly to a Wi-Fi hotspot. The implementation is described through its several developing steps, including the porting of the UE from a regular computer to a SBC. The performance of the network is then analysed based on measured results of throughput.
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Ge, He. "Flexible Digital Authentication Techniques." Thesis, University of North Texas, 2006. https://digital.library.unt.edu/ark:/67531/metadc5277/.
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Abstract This dissertation investigates authentication techniques in some emerging areas. Specifically, authentication schemes have been proposed that are well-suited for embedded systems, and privacy-respecting pay Web sites. With embedded systems, a person could own several devices which are capable of communication and interaction, but these devices use embedded processors whose computational capabilities are limited as compared to desktop computers. Examples of this scenario include entertainment devices or appliances owned by a consumer, multiple control and sensor systems in an automobile or airplane, and environmental controls in a building. An efficient public key cryptosystem has been devised, which provides a complete solution to an embedded system, including protocols for authentication, authenticated key exchange, encryption, and revocation. The new construction is especially suitable for the devices with constrained computing capabilities and resources. Compared with other available authentication schemes, such as X.509, identity-based encryption, etc, the new construction provides unique features such as simplicity, efficiency, forward secrecy, and an efficient re-keying mechanism. In the application scenario for a pay Web site, users may be sensitive about their privacy, and do not wish their behaviors to be tracked by Web sites. Thus, an anonymous authentication scheme is desirable in this case. That is, a user can prove his/her authenticity without revealing his/her identity. On the other hand, the Web site owner would like to prevent a bunch of users from sharing a single subscription while hiding behind user anonymity. The Web site should be able to detect these possible malicious behaviors, and exclude corrupted users from future service. This dissertation extensively discusses anonymous authentication techniques, such as group signature, direct anonymous attestation, and traceable signature. Three anonymous authentication schemes have been proposed, which include a group signature scheme with signature claiming and variable linkability, a scheme for direct anonymous attestation in trusted computing platforms with sign and verify protocols nearly seven times more efficient than the current solution, and a state-of-the-art traceable signature scheme with support for variable anonymity. These three schemes greatly advance research in the area of anonymous authentication. The authentication techniques presented in this dissertation are based on common mathematical and cryptographical foundations, sharing similar security assumptions. We call them flexible digital authentication schemes.