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1
Mäs, Stephan, Christin Henzen, and Lars Bernard. "GLUES GDI – eine Austauschplattform für Forschungsdaten zum nachhaltigen Landmanagement." Rhombos-Verlag, 2016. https://slub.qucosa.de/id/qucosa%3A16733.
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Die Veröffentlichung wissenschaftlicher Daten als zusätzlicher Output neben den wissenschaftlichen Publikationen hat in den letzten Jahren immer mehr an Bedeutung gewonnen. Mittlerweile wird die Publikation der erstellten Daten sogar häufig als Bedingung an die Förderung wissenschaftlicher Projekte gestellt und die dafür benötigten Forschungsdateninfrastrukturen sind selbst Gegenstand der Forschung geworden (Kindling, Schirmbacher 2013; Bernard et al. 2013; Bill 2014). In der Fördermaßnahme „Nachhaltiges Landmanagement“ des Bundesministeriums für Bildung und Forschung (BMBF) wurde hierfür im Rahmen des Koordinationsprojektes GLUES (Global Assessment of Land Use Dynamics, Greenhouse Gas Emissions and Ecosystem Services) eine wissenschaftliche Geodateninfrastruktur (GDI) für den Austausch der wissenschaftlichen Daten aus Modellrechnungen und Simulationen aufgebaut. Im Beitrag werden die spezifischen Anforderungen einer solchen wissenschaftlichen GDI adressiert und entsprechende Lösungen gezeigt. Dies betrifft unter anderem die Inhalte der Metadaten für die Simulationsergebnisse und deren übersichtliche Repräsentation im Netz, die Beschreibung und Visualisierung der Entstehungsgeschichte von Modelldaten sowie webbasierte Recherche-, Analyse- und Visualisierungswerkzeuge.
2
Hodgins, Gregory W. L. "Investigating methods of identifying pre-Renaissance artists' paints and glues." Thesis, University of Oxford, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.310530.
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Weatherell, Carl J. (Carl John) Carleton University Dissertation Chemistry. "The size exclusion chromatography of animal glues in zinc electrolytes." Ottawa, 1994.
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4
Li, Yongjiang. "In vitro characterization of cyanoacrylate embolic glues used for vascular embolization." Thesis, Compiègne, 2017. http://www.theses.fr/2017COMP2351/document.
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L’embolisation vasculaire est un traitement peu invasif utilisé pour éliminer ou interrompre de façon sélective les apports vasculaires à des régions spécifiques du corps. Une technique consiste en l’introduction d’un microcathéter dans le vaisseau sanguin cible et à administrer un agent embolique qui réagit au contact du sang. Les colles emboliques à base de cyanoacrylate sont les principaux agents liquides utilisés pour l’embolisation à cause de leur faible viscosité, leur bonne capacité de pénétration et leur faible toxicité tissulaire. Pour permettre sa détection après injection, la colle est mélangée à un agent de contraste radio-opaque telle que l’huile iodée Lipiodol®. Bien que la technique soit couramment utilisée, il existe peu de données sur la dynamique du processus d’injection au sein de flux sanguins complexes ou sur la cinétique de polymérisation du mélange colle-Lipiodol. Par conséquent, une occlusion sans danger est difficile à réaliser, même entre les mains de radiologues expérimentés. Le principal objectif de la thèse est d’étudier de façon quantitative les propriétés physiques et la cinétique de polymérisation des colles cyanoacrylates mélangées au Lipiodol dans différentes proportions. Nous avons conçu un nouveau dispositif expérimental pour caractériser le processus de polymérisation d’un mélange colle/Lipiodol en contact avec une solution ionique ou protéinée. Les résultats montrent un processus de polymérisation rapide à l’interface entre la colle et le substrat, suivi par la proagation d’un front de polymérisation dans le volume de préparation de colle. Les constantes de temps des processus dépendent des compositions de la solution et du mélange de colle. Un autre objectif est d’analyser le processus d’embolisation dynamique. Un modèle in vitro du processus d’injection est utilisé pour étudier en premier lieu la formation de goutte entre deux flux immiscibles et qui ne réagissent pas entre eux. L’injection d’une préparation de colle dans une solution ionique en écoulement est ensuite réalisée pour montrer l’influence conjointe de la polymérisation et de l’hydrodynamique. C’est la première fois qu’une telle caractérisation exhaustive de colles emboliques à base de cyanoacrylate est obtenue. Les résultats peuvent apporter des informations cruciales aux radiologues interventionnels, ce qui les aidera à comprendre et contrôler le comportement de la colle après injection afin d’accomplir une oblitération permanente des vaisseaux en toute sécuritéVascular embolization is a minimally invasive treatment used to selectively eliminate or stop the vascular supply to specific body areas. One technique consists of navigating a microcatheter into the targeted blood vessel and injecting an embolic agent which reacts in contact with blood. Cyanoacrylate-based embolic glues are the main liquid adhesives used for vascular embolization owing to their low viscosity, good penetration ability and low tissue toxicity. To enable its detection once injected, the glue is mixed with a radio-opaque contrast agent such as the Lipiodol iodized oil. Although the technique is commonly used, there is very little information on the dynamics of the injection process in complex blood flows or on the polymerization kinetics of the glue-Lipiodol mixture. Consequently, safe occlusion is difficult to achieve, even in the hands of experienced radiologists. The main objective of the thesis is to quantitatively investigate the physical properties and polymerization kinetics of cyanoacrylate glues mixed with Lipiodol in different proportions. We have designed a new experimental setup to characterize the polymerization process of a glue/Lipiodol mixture on contact with an ionic or proteinaceous solution. We find that there is a fast polymerization process at the interface between the glue and the substrate, followed by the propagation of a polymerization front in the glue mixture volume. The time constants of the processes depend on the solution and glue mixture compositions. Another objective is to analyze the dynamic embolization process. An in vitro model of the injection process is used to first investigate the drop formation between two non-reacting immiscible flows. The injection of a glue mixture into a flowing ionic solution is then performed to show the joint influence of polymerization and hydrodynamics. It is the first time that such comprehensive characterization of cyanoacrylate-based embolic glues is acquired. The results can provide crucial information to interventional radiologists, that will help them understand and control the glue behavior after injection to achieve a safe and permanent obliteration of the vessels
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Mandley, David John. "Laser activated tissue glues for use in laser assisted vascular anastomosis." Thesis, Loughborough University, 1995. https://dspace.lboro.ac.uk/2134/11867.
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Laser assisted vascular anastomosis has been reported to have potential advantages over sutured anastomosis, such as reduced operating time, reduced foreign body reactions and lower potential for vessel constriction. The anastomosis of graft material during coronary bypass surgery is one possible use of laser anastomosis. Although laser anastomosis has achieved some success, a major limitation of the approach has been the lack of knowledge regarding the optimal laser exposure necessary to produce a consistent weld. The first section of this thesis describes an investigation into the interaction of light within vascular tissue. Utilising the conventional kubelka-Munk treatment of reflectance and transmission measurements, values of the absorption and scattering coefficients were obtained. Additionally, spatially resolved reflection measurements, (typically used for determining the optical properties of highly scattering homogenious samples such as silica and aluminium oxide), were performed on sections of porcine aorta to determine absorption, scattering and anisotropy coefficients. The suitability of a series of chromophores to ·enhance the absorption of laser radiation at the site of anastomosis have been assessed from the aspect of spectral profile, temperature generating ability, and determination of the fluorescence quantum yield. The second section introduces the use of the Argon ion laser for tissue bonding. A range of in vitro experiments are detailed involving the repair of longitudinal arteriotomies and end-to-end anastomoses in porcine splenic arteries. These vessels have a similar wall thickness and diameter to human coronary arteries, furthermore, they have fewer side branches. An Argon laser was used with and without a range of chromophores and various protein additives. The use of a suitably absorbing chromophore and a reinforcing protein coagulant significantly increased the strength of blood vessel repair. Histological examination of the anastomotic sites, and the results of bursting pressure tests on end-toend anastomoses are detailed. The final section involved the development of chromophores whose absorption characteristics could be altered by irradiation . Steady state irradiation of various compositions of dye/reducing agent has allowed detennination of the quantum yields of photobleaching. Used in conjunction with a results of bursting pressure experiments, where the optimum irradiating conditions for successful bonding were detennined, a system has been created whereby over-irradiation of blood vessels during anastomosis can be eradicated. The assessment of this system is presented. Histological examination and bursting pressure tests performed on end-to-end anastomoses of porcine splenic arteries are detailed. Nanosecond laser flash photolysis studies have been used to investigate the process of dye photobleaching. These studies have shown that the process of photofading is somewhat complicated, however, a mechanism involving the triplet excited state of the Eosin Y dimer has been proposed.
6
Haghighi, Zahra. "Molecular characterization of animal glues for the purpose of restoration treatments." Master's thesis, Universidade de Évora, 2019. http://hdl.handle.net/10174/27680.
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Abstract:
Several thousand years ago, mankind perceived the gap and the need for an
adhesive in order to make complicated objects consisting of two or more different or even
same materials. Among all the materials that have been used throughout history, animal
glue has been employed as an adhesive for several various tasks and still has kept its
application. Animal glue has been used in book binding, painting binders, furniture
manufacturing, to name but a few. Today, in cultural heritage field, it is being used as
adhesive in restoration treatments. It is of great importance for conservators to be
confident in their knowledge of the original materials they are using and introducing to
the ‘matrix’ of cultural heritage objects in order to make proper decision in the process
of restoration. Animal glues, however, are intrinsically challenging materials due to the
fact that different animals’ collagen proteins exhibit different behaviors or performances
due to their different origin or preparation processes. Accordingly, different animal glues
are used for different tasks. Therefore, it is critical for conservators to know the
composing materials of animal glues they employ.
In this thesis, collagen proteins of several samples of animal glue which have been
provided by restoration laboratories of both S. Orsola Benincasa, Naples, Italy and Museo
del Prado, Madrid, Spain were identified by MALDI-TOF and LC-MS/MS coupled with
Mascot bioinformatic tool with the goal of protein identification. Samples of S. Orsola
Benincasa were analyzed by LC-MS/MS and Mascot in order to identify the specie(s)
and tissue(s) they have been made of. Out of 8 samples, only one of them was made of
what the label claimed to be. These results showed the importance of these experiments
for the art conservation community as using known and standard materials forms a great
part of their actions toward restoration of cultural heritage objects. Additionally, one of
the samples, rabbit glue totten sixties, were chosen to demonstrate, in a preliminary
manner, the capabilities of proteomics in the evaluation of degradation phenomenon.
Samples of Museo del Prado were analyzed by MALDI-TOF in order to
demonstrate differences between the amount of information one can gain from MALDITOF
in comparison with LC-MS/MS. Finally, one of the samples of Museo del Prado
was used to improve the sample preparation protocol, by examining the hypothesis of
whether or not combining two protocols could yield higher sequence coverage and betterquality
spectra. Results of the series of experiments showed that adding ZipTip clean-up
step after StageTip protocol increases the number of peptides in respect to what can be
obtained by using a single chromatographic step.
7
Carter, David Gerald. "Insect egg glue : an investigation of the nature and secretion of insect egg glues, with special reference to the human louse, Pediculus humanus and the cabbage white butterfly, Pieris brassicae." Thesis, University of Cambridge, 1990. https://www.repository.cam.ac.uk/handle/1810/250982.
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The primary aim of the thesis was to investigate the nature and secretion of insect egg glues. Very little work has been done on this group of secretions, even though they are essential to the survival of a wide range of insect pest species. Knowledge of how they work could lead to the production of repellants or solvents which could be used as non-toxic means of control. Initial studies were performed on the cabbage white butterfly. Histological and histochemical techniques were employed to examine the structure and composition of the glue and glue glands. Separated glue was chemically analysed, and the amino acid composition of major protein components was determined. Butterflies were induced to lay eggs on a variety of surfaces, and the tensile strength of glue deposited in different chemical environments was investigated. The physical structure of the glue was examined. A treatment which destroyed the strength of butterfly glue was identified. Techniques perfected on the butterfly were then applied to the human clothing louse. A detailed examination of the louse reproductive system was carried out, using a combination of dissection, histology, and electron microscopy. The egg laying behaviour of head lice and clothing lice was compared with that reported in other species. The physical structure of the glue was investigated using polarised light and electron microscopy. The structure and formation of louse eggs was examined, including a study of the transmission of symbiotic organisms into developing oocytes. Development of embryos inside the body of the female was observed in some cases, and these were successfully cultured in vitro until they hatched. The respiratory openings of the louse egg were positively identified. The preference of lice for laying eggs on different fabrics was studied. An attempt was made to discourage lice from laying eggs on hair by coating it with Prolong. The possibility of using Prolong as a control method for developing eggs and active stages was assessed. Use of Prolong in combination with wetting agents was also investigated.
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Ševčík, Jan. "Lepené hybridní spoje v automobilovém průmyslu." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2018. http://www.nusl.cz/ntk/nusl-382110.
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This diploma thesis deals with bonded hybrid joints which are used for connecting parts of modern coachwork. Firstly, the thesis describes in general the process of production of the whole coachwork, from cutting of the blanks to the surface treatment including the analysis of the used materials. Subsequently, the problem of joining body parts through adhesives, but also by welding, soldering or other methods is discussed. Another part of this thesis is dedicated to an experiment in which the qualities of bonded hybrid joints were determined. Different ways of realizing the joint have been made which differed in the size of the glued surface, in the welding methods and in the process of their creation. The produced joints were tested for their strength and quality.
9
Williams, Walter Ray. "Stress analysis of a glued timber beam." Master's thesis, Mississippi State : Mississippi State University, 2009. http://library.msstate.edu/etd/show.asp?etd=etd-04032009-085801.
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Sterley, Magdalena. "Characterisation of green-glued wood adhesive bonds." Doctoral thesis, Linnéuniversitetet, Institutionen för teknik, TEK, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-18606.
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The gluing of unseasoned wood, called green gluing, is a relatively new sawmill process, implying a radically changed order of material flow in the production of value-added wood-based products. It facilitates the enhancement of raw material recovery and value yield by integrating defect elimination and gluing already before kiln drying. The present study evaluates green glued adhesive bonds in flatwise glued beams and finger joints. The main part of this work deals with green gluing using a moisture curing polyurethane adhesive (PUR). Standardised test methods and specially designed, small scale, specimens were used for the determination of the strength, fracture energy and the ductility of both dry- and green glued bonds in tension and in shear. Using the small scale specimens it was possible to capture the complete stress versus deformation curves, including also their unloading part. An optical system for deformation measurement was used for the analysis of bond behaviour. The influence of moisture content during curing and temperature after curing on the adhesive chemical composition and on the mechanical properties was investigated. Furthermore, the moisture transport through the adhesive bond during curing was tested. Finally, microscopy studies were performed for analysis of bond morphology and fracture. The results show that two significant factors influence the shear strength of green glued bonds: wood density and adhesive spread rate. Bonds which fulfil the requirements according to EN 386 could be obtained within a wide range of process parameters. The small specimen tests showed that green glued PUR bonds can reach the same strength and fracture energy, both in shear and in tension, as dry glued bonds with the same adhesive amount. The local material properties of the bonds could be determined, thanks to the failure in the tests taking place within the adhesive bond itself and not in the wood. Following process factors were shown to cause lower bond strength: a) a low adhesive spread rate, b) high pressure and c) short pressing time in combination with low wood density and high moisture content. Moreover, the heat treatment of the cured PUR adhesive during drying influenced the chemical composition of the adhesive, providing for higher strength, stiffness and Tg of the adhesive, caused by an increased amount of highly ordered bidentate urea.
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Le, Meur Karim. "Interactions neurones-glies dans l’hippocampe de rat." Paris 6, 2008. http://www.theses.fr/2008PA066179.
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Les astrocytes assurent l’apport de métabolites, la capture et le recyclage des neurotransmetteurs libérés synaptiquement. Ils influencent aussi la transmission synaptique et l’activité des réseaux de neurones en libérant des transmetteurs qui activent des récepteurs neuronaux. Ce travail a caractérisé une conductance tonique excitatrice dans les neurones de l’hippocampe impliquant des récepteurs NMDA extrasynaptiques activés par du glutamate d'origine gliale (Le Meur, 2007). Il décrit aussi des influences transitoires excitatrices et inhibitrices dues à l’activation de récepteurs NMDA et GABAA par du glutamate et du GABA ou de la taurine libérés par les astrocytes dans l’hippocampe (Le Meur et Audinat, soumis). Ces travaux montrent que les astrocytes peuvent exercer des influences excitatrices et inhibitrices sur l’activité des neurones en libérant différents gliotransmetteurs, et qu’ils ont la capacité de moduler l’excitabilité neuronale de façon transitoire et tonique
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Parr, Stephen J. "Data Transport Subsystem: The SFOC Glue." International Foundation for Telemetering, 1988. http://hdl.handle.net/10150/615255.
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International Telemetering Conference Proceedings / October 17-20, 1988 / Riviera Hotel, Las Vegas, NevadaThe Data Transport Subsystem (DTS) is a core subsystem of SFOC which holds together the GIFs, TISes, DMDs, DTVs and other SFOC application subsystems allowing them to operate in a distributed LAN based workstation environment. DTS does this by providing two primary features. The first feature is transparent local and remote interprocess communication. The communications interface is identical between two application subsystem processes whether they're running in the same machine or different machines. The second feature is the Logical Name Server, which makes connections on a name basis without regard to location or network topology. With these two features SFOC becomes a distributed system. Processes within a subsystem can even be distributed to perform load leveling and enhance system performance. Distribution fosters the use of redundancy and hot backups by allowing nodes to serve multiple purposes. Distribution allows isolation of mission telemetry while providing shared use of a common database. It supports the SFOC goal of off-the-shelf hardware expansion and upgrade. DTS provides an open-close-send-receive model of interprocess communication. It offers three types of service: virtual circuit, datagram and broadcast. The virtual circuit service supplies a full duplex path between communication endpoints and guarantees data integrity. The datagram service allows many communications endpoints to send to one endpoint. This is useful for sending status to a central process. The broadcast service allows a process to send to many receiver endpoints. This can be used for continuous monitoring of telemetry streams by multiple processes.
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Oh, Jiyoon. "Timber moment connections using glued-in steel rods." Thesis, University of British Columbia, 2016. http://hdl.handle.net/2429/57566.
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The experimental study completed in this thesis focused on timber-steel hybrid moment connections using d=12.7mm diameter mild steel threaded rods glued into Douglas-Fir glulam with polyurethane based adhesive. Two phases of experiments were conducted: the first to determine the minimum design parameter values that result in a ductile tensile failure of the glued-in steel rod, instead of a brittle timber or pull-out failure; and the second, to determine a relationship between the different design parameters and the moment capacity of the connection.
The work established that the moment connection fails in a ductile manner due to rod yielding and plasticizing, when the shear force induced into the system was less than 25% of the maximum axial capacity of the steel rods. Then, ductile failure occurred even when the edge distances of the steel rods were below the recommendation of a minimum 2.5d to prevent splitting of the wood. Rod pull-out failure was prevented by having a glued-in embedment length of the rods equal to or greater than 15d. In addition, ductility and equivalent viscous damping ratio were found to decrease as the moment capacity of the connection increased.
The theoretical yield moment was calculated based on the assumption that the compression and tension members are timber and steel, respectively, and by applying the concept that plane-sections remain plane and the traditional elastic transform theory. The experimentally determined yield moments were established to be a close match. The results of the research provide guidance to practicing engineers to design moment connections with glued-in steel rods.Applied Science, Faculty of
Civil Engineering, Department of
Graduate
14
Aslan, Jiyan, and Marcus Asp. "Jointed timber column with glue or nails." Thesis, Linköpings universitet, Kommunikations- och transportsystem, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-131980.
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På en byggarbetsplats kan man ibland behöva sammansätta två eller flera träkomponenter till en träkomponent med rätt dimension. Det sker oftast genom spikning men det finns också möjlighet att limma ihop träkomponenter ute på en byggarbetsplats. Limning är inte alls lika förekommande på grund av de krav som ställs på limning av bärande konstruktioner och kringliggande miljö varför limning i princip endast sker i fabriksmiljö. I denna studie utförs en jämförelse mellan sammansättning av träreglar till en träpelare med avseende på hållfasthet och ekonomi. Detta jämförs dessutom med att köpa in pelare av trä med rätt dimension. I studien behandlas dessutom möjligheten att limma ute på en byggarbetsplats och hur limningen ska utföras på ett korrekt sätt. Studien har genomförts med hjälp av de standarder som finns för beräkningsregler för dimensionering av bärverk, eurokoder. Kostnadsberäkningar har genomförts för material och utförandearbete med hjälp av marknadspriser för material och enkla beräkningar för utförandearbete. En intervju har genomförts för att besvara möjligheten att limma ute på en byggarbetsplats med lim för bärande konstruktioner. I studien har beräkningar utförts för två samt tre sammansatta träreglar och jämförts med enkla pelare i liknande dimensioner. Spikad pelare har en avsevärt lägre bärförmåga än limmad pelare som är utförd korrekt. Spikad pelare har beräknats med olika avstånd mellan spikar och limmad pelare är beräknad med två olika lim. Kostnaderna för material och utförandearbete är ganska generella men är bara en liten del av de totala kostnaderna. Vart byggarbetsplatsen är placerad, vilka verktyg och material som finns på plats och vilka förutsättningar för att utföra limningen korrekt är faktorer som är avgörande för den totala kostnaden. Ett limförband är känslig och viktigast är att applicera rätt mängd och jämnt utbrett över träytorna. Vad som dessutom ska tas till hänsyn är kringliggande miljö såsom smuts, damm, temperatur och fuktighet. För att uppfylla dessa krav ute på en byggarbetsplats måste en fabriksmiljö skapas i form av väderskydd, tält, arbetsbod eller liknande.
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Berg, Kyle. "Spider Aggregate Glue Sequence Characterization and Expression." DigitalCommons@USU, 2016. https://digitalcommons.usu.edu/etd/5022.
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Spider aggregate glue is secreted on to the webs of many spiders in the superfamily Araneoidea. Aggregate glue is sticky when wet and has a unique stress strain curve that varies depending on the relative humidity and speed of probe retraction. These features make it an attractive target for applications such as underwater adhesives or surgical glues. However, little is known about the genetic sequence of the glue protein itself. In this work, a method is identified to isolate the remainder of the aggregate gene sequence, and genetic constructs glue are created using known aggregate gene sequence. One construct is expressed in E. coli BL21 cells and the protein is tested for its adhesive properties.
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Madhoushi, Mehrab. "Fatigue of glued-in pultruded connections for structural timber." Thesis, University of Bath, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.269838.
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Muraleedharan, Aishwarya, and Reiterer Stefan Markus. "Combined glued laminated timber using hardwood and softwood lamellas." Thesis, Linnéuniversitetet, Institutionen för byggteknik (BY), 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-58628.
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In this thesis, the behaviour of glued laminated timber combined with hardwood and softwood lamallae is investigated. The influence of hardwood in the tension and compression zone, in terms of strength and stiffness is evaluated.The basis of evaluation consists of determining the behaviour of beams with various combinations of hardwood solely in the tension zone along with beams with hardwood in the tension and compression zone. The influence of different amount of hardwood for both cases is studied my means of experimental and analytical methods.Experimental data attained by performing bending tests are evaluated for different combinations made from spruce and oak. By comparing the experimental and analytical data an increase in the strength and stiffness in various combinations is observed and potrayed which varies based on different wood species.
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May, Jeremy James. "Live load distribution factors for glued-laminated timber bridges." [Ames, Iowa : Iowa State University], 2008.
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Clarici, Marco. "Design of a large glued-laminated timber arched roof." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2012. http://amslaurea.unibo.it/3984/.
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Karlsson, Fredrik, Zlatan Ramic, and Karl Tartes. "Increasing Damping Capacity of Shear Walls with Glued-Nail Joints." Thesis, Linnéuniversitetet, Institutionen för teknik, TEK, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-19271.
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The purpose of this master thesis has been to investigate the possibility to increase the damping capacity of shear walls with the use of glue in combination with nails. It has been done with experiment and with FE-simulations. The first experimental part is tensile tests of four different glue types which have been analyzed to get material data. The second experimental part is analysis of glued-nail joint in shear test. FE-simulations of glued-nail joints are finally done in Abaqus/CAE. The experiments in shear tests of glued-nail joints showed that two glues failed and could not be used for further analysis. The two other glues had an increase in damping capacity compared with results from nail joint. Further FE-simulations of glued-nailed joints have to be done in order to calibrate the FE-model with the results of glued-nailed joints in shear tests. The uncertainty is found in the material properties of the glue, experimental test data was not adequate. The conclusion is that glued-nail joints can increase the damping capacity in shear walls.Damping capacity, shear wall, hysteresis, shear test, finite element method, Abaqus/CAE
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Hardin, John Melvin. "Upgrading particle identification and searching for leptophobic bosons at GlueX." Thesis, Massachusetts Institute of Technology, 2018. http://hdl.handle.net/1721.1/119104.
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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Physics, 2018.Cataloged from PDF version of thesis.
Includes bibliographical references (pages 137-140).
MIT's contribution to the GLUEX project was the design and implementation of upgraded particle identification (PID) for the GLUEX strangeness program. The development of a Cherenkov detector known as a DIRC (Detection of Internally Reflected Cherenkov light) is presented. The design begins with a DIRC configuration implemented as a prototype for the SuperB experiment, and modifications to this design are made based on simulations and tests of components. A novel method of reconstructing DIRC patterns is presented. In addition to detector design, a search for a leptophobic boson using GLUEX data is also presented. The process of preparing for a general 3[pi] and [pi]⁰[gamma] bump hunt is discussed along with the expected sensitivity of this search to the specific model of a B boson, which is a proposed particle generated by a U(1) gauge symmetry associated with baryon number. This preparation includes the data-driven determination of GLUEX properties such as reconstruction efficiencies and invariant mass resolution. A paper containing these results is expected to go into GLUEX review this summer.
by John Melvin Hardin.
Ph. D.
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Tapia, Camú Cristóbal Arnoldo. "Internal and external reinforcements for holes in glued laminated beams." Tesis, Universidad de Chile, 2015. http://repositorio.uchile.cl/handle/2250/133158.
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Ingeniero CivilEl uso de vigas laminadas encoladas requiere con frecuencia la inclusión de aperturas, con el fin de cumplir con especificaciones arquitectónicas, tales como ductos de ventilación o instalaciones sanitarias, entre otros. La perforación produce concentraciones de esfuerzos de tracción perpendiculares a la dirección de las fibras en la región que bordea la apertura, promoviendo el inicio de una grieta. El Anexo Nacional Alemán (NA) para la norma Europea de diseño de estructuras de madera EN 1995-1-1 provee reglas de diseño para esta situación, incluyéndose aperturas sin reforzar, así como también el uso de uno de entre dos tipos de refuerzos: internos (tipo barra) o externos (tipo placa). Esta tesis analiza diferentes modelos de elementos finitos (EF) para describir la influencia de refuerzos internos dentro de un elemento de madera laminada encolada. Se observa que modelos 2D tienden a sobrestimar la influencia de los refuerzos internos, mientras que el uso de elementos unidimensionales (lineas), para representar los refuerzos internos dentro de un modelo 3D de la madera laminada encolada, resulta en una clara subestimación de dicha influencia. En otro punto, la posición de los refuerzos internos relativos al punto medio de la sección transversal, influye en la cantidad de fuerza vertical que el refuerzo es capaz de transferir. Esto se debe a la anisotropía cilíndrica que caracteriza a las laminas individuales, lo cual gobierna el comportamiento constitutivo de la madera laminada encolada como material. Las ecuaciones de diseño contenidas en DIN EN 1995-1-1/NA son revisadas y comparadas contra resultados de EF, donde ciertas discrepancias son encontradas y presentadas. Con base en estos resultados, nuevas ecuaciones son desarrolladas, las cuales contienen coeficientes que son posteriormente calibrados haciendo uso de los datos obtenidos de los modelos de EF. Una relación de dependencia con el tamaño para las concentraciones de esfuerzos es encontrada en las ecuaciones aquí derivadas, esto debido al uso de un radio constante en las esquinas de las aperturas rectangulares, lo cual obedece a una práctica común en la manufactura de las mencionadas perforaciones. Un radio de esquina dependiente de la geometría de la viga resolvería parte de este problema. Finalmente, una serie de test relativamente grande ---la cual incluye algunas vigas de pino Radiata de Chile--- es llevada a cabo, con el fin de evaluar la efectividad de cada tipo de refuerzo, así como para validar los modelos de EF utilizados en las etapas anteriores. En general se obtiene una concordancia satisfactoria entre los experimentos y los resultados de las simulaciones.
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Dbeyssi, Alaa. "Study of the internal structure of the proton with the PANDA experiment at FAIR." Phd thesis, Université Paris Sud - Paris XI, 2013. http://tel.archives-ouvertes.fr/tel-00906761.
Full textAbstract:
The proton is a bound state of quarks which are held together by the strong force, mediated by gluons. The understanding of the proton structure is presently one of the central issues in hadron physics. The present work reports on phenomenological and experimental studies related to the possibilities offered by the future antiproton beam at the FAIR facility at Darmstadt, in the momentum range between 1.5 and 15 GeV/c. After a classification of the reaction channels which are accessible in antiproton-proton annihilation, the main features of the PANDA detector are described. A chapter of this thesis is dedicated to the study of the optical coupling between crystals and photodiodes in the electromagnetic calorimeter, which will be operated at low temperature (-25° C). Mechanical, thermal, optical properties and radiation hardness of two commercial glues are quantified.Feasibility studies of the reaction barp → e+e− for the Time-Like proton form factor measurements at PANDA are presented. The electromagnetic structure of the proton is parametrized in terms of electric GE and magnetic GM form factors. The electromagnetic interaction is well described by the theory of quantum electrodynamics. The traditional tool to determine proton electromagnetic form factors is polarized and unpolarized electron-proton elastic scattering, assuming that the interaction occurs through the exchange of one virtual photon. The crossed symmetry channels pbarp ↔ e+e− allowto access the Time-Like region. The background reactions are also studied, in particular the pbarp → π+π− channel. The results obtained from a realistic Monte Carlo simulation using PANDARoot show that the proton form factor ratio can be measured at PANDA with unprecedented accuracy. The effects of radiative corrections due to real and virtual photon emission are considered.Based on a model independent formalism, the calculation of the experimental observables for the pbarp → e+e− reaction is extended to the annihilation into a heavy lepton pair which carries the same physical information on the proton structure as the electrons. In this case, the lepton mass can not be neglected. The same formalism is also applied in Space-Like region to the elastic scattering of protons from electrons at rest (pe-inverse kinematics). We suggest that the elastic pe scattering can be used to polarize and/or to measure the polarization of high energy proton (antiproton) beams, and allows a precise measurement of the proton charge radius.
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Persson, Emilie. "Hållbar stadsutveckling : I gränslandet melllan kompakt och gles bebyggelsestruktur." Thesis, Stockholm University, Department of Human Geography, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-28100.
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Jagger, Elizabeth A. S. M. "The production and functioning of knowledge about 'glue sniffing'." Thesis, University of Glasgow, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.334668.
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Richie, Matthew. "Fatigue Behavior of FRP-Reinforced Douglas-Fir Glued Laminated Bridge Girders." Fogler Library, University of Maine, 2003. http://www.library.umaine.edu/theses/pdf/RichieMC2003.pdf.
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Lu, Qiang. "A Real-Time System for Color Sorting Edge-Glued Panel Parts." Thesis, Virginia Tech, 1994. http://hdl.handle.net/10919/35881.
Full textAbstract:
This thesis describes the development of a software system for
color sorting hardwood edge-glued panel parts. Conceptually, this
system can be broken down into three separate processing steps. The
first step is to segment color images of each of the two part faces
into background and part. The second step involves
extracting color information from each region labeled part
and using this information to classify each part face as one of a
pre-selected number of color classes plus an out class. The
third step involves using the two face labels and some distance
information to determine which part face is the better to use in
the face of an edge-glued panel. Since a part face is illuminated while
the background is not, the segmentation into background and part
can be done using very simple computational methods.
The color classification component of this system is based on the
Trichromatic Color Theory. It uses an estimate of a part's
3-dimension (3-D) color probability function, P, to characterize
the surface color of the part. Each color class is also
represented by an estimate of the 3-D color probability function
that describes the permissible distribution of colors within this
color class. Let P_omega_i denote the estimated probability
function for color class omega_i. Classification is
accomplished by finding the color difference between the estimated
color probability function for the part and each of the estimated
3-D color probability functions that represent the color classes.
The distance function used is the sum of the absolute values of the
differences between the elements of the estimated probability
function for a class and the estimated probability function of the
part. The sample is given the label of the color class to which it
is closest if this distance is less than some class specific
threshold for that class. If the distance to the class to which the
part is closest is larger than the threshold for that class, the
part is called an out. This supervised classification
procedure first requires one to select training samples from each
of the color classes to be considered. These training samples are
used to generate P_omega_i for each color class omega_i
and to establish the value of the threshold T_i that is used to
determine when a part is an out. To aid in determining which
part face is better to use in making a panel, the system allows one
to prioritize the various color classes so that one or more color
classes can have the same priority. Using these priorities, labels
for each of the part faces, and the distance from each of the part
faces' estimated probability functions to the estimated probability
function of the class to which each face was assigned, the decision
logic selects which is the ``better'' face. If the two part faces
are assigned to color classes that have different priorities, the
part face assigned to the color class with higher priority is
chosen as the better face. If the two part faces have been
assigned to the same color class or to two different classes having
the same priority, the part face that is closest to the estimated
probability function of the color class to which it has been
assigned is chosen to be the better face. Finally, if both faces
are labeled out, the part becomes an out part. This
software system has been implemented on a prototype machine vision
system that has undergone several months of in-plant testing. To
date the system has only been tested on one type of material,
southern red oak, with which it has proven itself capable of
significantly out performing humans in creating high-quality
edge-glued panels. Since southern red oak has significantly more
color variation than any other hardwood type or species, it is
believed that this system will work very well on any hardwood
material.Master of Science
28
Anshari, Buan. "Structural behaviour of glued laminated timber beams reinforced by compressed wood." Thesis, University of Liverpool, 2012. http://livrepository.liverpool.ac.uk/9115/.
Full textAbstract:
As an engineered wood product, glued laminated timber (Glulam) is produced to minimise several natural weaknesses such as knots and non-uniform strength in order to enhance its stiffness and load carrying capacity. Many reinforcement methods have been tested, with promising results in increasing the strength and stiffness of beam. Recently, with increasing concern on environmental protection there is a growing trend in construction to use as many natural materials as possible. Therefore, conventional types of reinforcement using metals and/or synthetic materials do not fit well with this trend. A new approach to strengthen Glulam beams using pure natural materials has been established through this research. Glulam beams were strengthened by inserting compressed wood (CW) blocks into the pre-cut rectangular holes on the top of the beams. This practice was to make use of moisture-dependent swelling nature of the compressed wood. As a result, a pre-camber was produced in the mid-span of the beam reinforced. Significant initial tensile and compressive stresses were generated at both the top and the bottom extreme fibres of the beam, respectively. Material tests have been done to investigate material properties of compressed Japanese cedar with different compression ratios. Structural tests were undertaken for short and long Glulam beams strengthened by CW blocks after gained the pre-camber. 3-D finite element models have also been developed by using commercial code ABAQUS to simulate the pre-stressing behaviour of Glulam beams reinforced using compressed wood blocks. The finite element models were used to simulate the structural behaviour of the pre-stressed beams subjected to subsequent destructive bending tests. All computer models developed were validated against corresponding experimental results of the free moisture-dependent swelling, pre-stressing processes and the destructive tests for both the short and long beams. Reasonably good correlation was obtained in terms of the free swelling, the pre-camber, initial stress state of the Glulam beams reinforced and load-deflection relationships. Using validated computer models, parametric studies were further carried out to provide design information for such a reinforcing technique. The results have indicated that the reinforcing techniques using compressed wood blocks are very effective means to enhance the initial stiffness, bending strength and load carrying capacity of Glulam beams. The technology is ready to be applied in practice.
29
Bucci, Diego <1981>. "Detection and localization of GLUTs in spermatozoa from different domestic species." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2010. http://amsdottorato.unibo.it/2353/1/Bucci_Diego_tesi.pdf.
Full textAbstract:
Sperm cells need hexoses as a substrate for their function, for both the maintenance of membrane homeostasis and the movement of the tail. These cells have a peculiar metabolism that has not yet been fully understood, but it is clear that they obtain energy from hexoses through glycolisis and/or oxidative phosphorylation.
Spermatozoa are in contact with different external environments, beginning from the testicular and epididymal fluid, passing to the seminal plasma and finally to the female genital tract fluids; in addition, with the spread of reproductive biotechnologies, sperm cells are diluted and stored in various media, containing different energetic substrates. To utilize these energetic sources, sperm cells, as other eukaryotic cells, have a well-constructed protein system, that is mainly represented by the GLUT family proteins. These transporters have a membrane-spanning α-helix structure and work as an enzymatic pump that permit a fast gradient dependent passage of sugar molecules through the lipidic bilayer of sperm membrane.
Many GLUTs have been studied in man, bull and rat spermatozoa; the presence of some GLUTs has been also demonstrated in boar and dog spermatozoa.
The aims of the present study were
- to determine the presence of GLUTs 1, 2, 3, 4 and 5 in boar, horse, dog and donkey spermatozoa and to describe their localization;
- to study eventual changes in GLUTs location after capacitation and acrosome reaction in boar, stallion and dog spermatozoa;
- to determine possible changes in GLUTs localization after capacitation induced by insulin and IGF stimulation in boar spermatozoa;
- to evaluate changes in GLUTs localization after flow-cytometric sex sorting in boar sperm cells.
GLUTs 1, 2, 3 and 5 presence and localization have been demonstrated in boar, stallion, dog and donkey spermatozoa by western blotting and immunofluorescence analysis; a relocation in GLUTs after capacitation has been observed only in dog sperm cells, while no changes have been observed in the other species examined. As for boar, the stimulation of the capacitation with insulin and IGF didn’t cause any change in GLUTs localization, as well as for the flow cytometric sorting procedure.
In conclusion, this study confirms the presence of GLUTs 1, 2 ,3 and 5 in boar, dog, stallion and donkey spermatozoa, while GLUT 4 seems to be absent, as a confirmation of other studies. Only in dog sperm cells capacitating conditions induce a change in GLUTs distribution, even if the physiological role of these changes should be deepened.Gli spermatozoi di mammifero necessitano di zuccheri per espletare le loro funzioni, come il mantenimento dell’omeostasi membranale ed il movimento. Queste cellule hanno un metabolismo particolare, che non è ancora stato del tutto compreso, anche se è chiaro che ottengano energia da esosi tramite il processo glicolitico e la fosforilazione ossidativa. Gli spermatozoi sono a contatto con ambienti esterni molto diversi: dai fluidi testicolare ed epididimale, per passare al plasma seminale ed infine alle secrezioni dell’apparato genitale femminile. Inoltre, con la diffusione delle biotecnologie riproduttive, il liquido seminale è diluito e conservato in svariati media contenenti diversi substrati energetici. Per sfruttare queste fonti energetiche gli spermatozoi, come le altre cellule eucariotiche, hanno un sistema proteico di membrana ben definito, rappresentato principalmente dalla famiglia dei GLUT. Queste proteine hanno una struttura transmembranale ad alfa elica e funzionano come una pompa enzimatica che permette un trasporto passivo veloce e secondo gradiente di concentrazione delle molecole di zucchero attraverso lo strato lipidico. Alcuni GLUT sono stati studiati negli spermatozoi di uomo, ratto e toro e la presenza di alcuni altri è stata dimostrata in cane e maiale. Gli scopi di questo studio sono stati: • determinare la presenza dei GLUT 1, 2, 3, 4 e 5 in spermatozoi di maiale, cane , stallone e asino e descrivere la loro localizzazione; • studiare eventuali cambi di localizzazione dovuti alla capacitazione o alla reazione acrosomiale in spermatozoi di maiale, cane e stallone; • valutare cambiamenti nella disposizione dei GLUT negli spermatozoi di maiale in seguito a capacitazione stimolata con insulina ed IGF; • valutare possibili cambiamenti di localizzazione dei GLUT a seguito del processo di “sessaggio” mediante citofluorimetro sorter. La presenza e la localizzazione dei GLUT 1, 2, 3 e 5 sono state dimostrate negli spermatozoi di maiale, asino, cavallo e cane mediante le tecniche di western blotting ed immunofluorescenza indiretta; una rilocalizzazione delle proteine dopo capacitazione è stata osservata solo negli spermatozoi di cane e nessun cambiamento è stato registrato nelle altre specie. Per quanto riguarda il maiale, non si sono rilevate rilocalizzazioni dei GLUT a seguito della capacitazione con stimolazione con insulina ed IGF e nemmeno a seguito del processo di “sex sorting”. Concludendo, questo studio conferma la presenza dei GLUT 1, 2, 3 e 5 negli spermatozoi di maiale, cane stallone e asino, mentre il GLUT 4 sembra essere assente, a conferma di alcuni studi precedenti. Solo negli spermatozoi di cane le condizioni capacitanti inducono un cambiamento nella distribuzione dei GLUT, anche se il ruolo fisiologico di questi cambiamenti deve essere ancora approfondito.
30
Bucci, Diego <1981>. "Detection and localization of GLUTs in spermatozoa from different domestic species." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2010. http://amsdottorato.unibo.it/2353/.
Full textAbstract:
Sperm cells need hexoses as a substrate for their function, for both the maintenance of membrane homeostasis and the movement of the tail. These cells have a peculiar metabolism that has not yet been fully understood, but it is clear that they obtain energy from hexoses through glycolisis and/or oxidative phosphorylation.
Spermatozoa are in contact with different external environments, beginning from the testicular and epididymal fluid, passing to the seminal plasma and finally to the female genital tract fluids; in addition, with the spread of reproductive biotechnologies, sperm cells are diluted and stored in various media, containing different energetic substrates. To utilize these energetic sources, sperm cells, as other eukaryotic cells, have a well-constructed protein system, that is mainly represented by the GLUT family proteins. These transporters have a membrane-spanning α-helix structure and work as an enzymatic pump that permit a fast gradient dependent passage of sugar molecules through the lipidic bilayer of sperm membrane.
Many GLUTs have been studied in man, bull and rat spermatozoa; the presence of some GLUTs has been also demonstrated in boar and dog spermatozoa.
The aims of the present study were
- to determine the presence of GLUTs 1, 2, 3, 4 and 5 in boar, horse, dog and donkey spermatozoa and to describe their localization;
- to study eventual changes in GLUTs location after capacitation and acrosome reaction in boar, stallion and dog spermatozoa;
- to determine possible changes in GLUTs localization after capacitation induced by insulin and IGF stimulation in boar spermatozoa;
- to evaluate changes in GLUTs localization after flow-cytometric sex sorting in boar sperm cells.
GLUTs 1, 2, 3 and 5 presence and localization have been demonstrated in boar, stallion, dog and donkey spermatozoa by western blotting and immunofluorescence analysis; a relocation in GLUTs after capacitation has been observed only in dog sperm cells, while no changes have been observed in the other species examined. As for boar, the stimulation of the capacitation with insulin and IGF didn’t cause any change in GLUTs localization, as well as for the flow cytometric sorting procedure.
In conclusion, this study confirms the presence of GLUTs 1, 2 ,3 and 5 in boar, dog, stallion and donkey spermatozoa, while GLUT 4 seems to be absent, as a confirmation of other studies. Only in dog sperm cells capacitating conditions induce a change in GLUTs distribution, even if the physiological role of these changes should be deepened.Gli spermatozoi di mammifero necessitano di zuccheri per espletare le loro funzioni, come il mantenimento dell’omeostasi membranale ed il movimento. Queste cellule hanno un metabolismo particolare, che non è ancora stato del tutto compreso, anche se è chiaro che ottengano energia da esosi tramite il processo glicolitico e la fosforilazione ossidativa. Gli spermatozoi sono a contatto con ambienti esterni molto diversi: dai fluidi testicolare ed epididimale, per passare al plasma seminale ed infine alle secrezioni dell’apparato genitale femminile. Inoltre, con la diffusione delle biotecnologie riproduttive, il liquido seminale è diluito e conservato in svariati media contenenti diversi substrati energetici. Per sfruttare queste fonti energetiche gli spermatozoi, come le altre cellule eucariotiche, hanno un sistema proteico di membrana ben definito, rappresentato principalmente dalla famiglia dei GLUT. Queste proteine hanno una struttura transmembranale ad alfa elica e funzionano come una pompa enzimatica che permette un trasporto passivo veloce e secondo gradiente di concentrazione delle molecole di zucchero attraverso lo strato lipidico. Alcuni GLUT sono stati studiati negli spermatozoi di uomo, ratto e toro e la presenza di alcuni altri è stata dimostrata in cane e maiale. Gli scopi di questo studio sono stati: • determinare la presenza dei GLUT 1, 2, 3, 4 e 5 in spermatozoi di maiale, cane , stallone e asino e descrivere la loro localizzazione; • studiare eventuali cambi di localizzazione dovuti alla capacitazione o alla reazione acrosomiale in spermatozoi di maiale, cane e stallone; • valutare cambiamenti nella disposizione dei GLUT negli spermatozoi di maiale in seguito a capacitazione stimolata con insulina ed IGF; • valutare possibili cambiamenti di localizzazione dei GLUT a seguito del processo di “sessaggio” mediante citofluorimetro sorter. La presenza e la localizzazione dei GLUT 1, 2, 3 e 5 sono state dimostrate negli spermatozoi di maiale, asino, cavallo e cane mediante le tecniche di western blotting ed immunofluorescenza indiretta; una rilocalizzazione delle proteine dopo capacitazione è stata osservata solo negli spermatozoi di cane e nessun cambiamento è stato registrato nelle altre specie. Per quanto riguarda il maiale, non si sono rilevate rilocalizzazioni dei GLUT a seguito della capacitazione con stimolazione con insulina ed IGF e nemmeno a seguito del processo di “sex sorting”. Concludendo, questo studio conferma la presenza dei GLUT 1, 2, 3 e 5 negli spermatozoi di maiale, cane stallone e asino, mentre il GLUT 4 sembra essere assente, a conferma di alcuni studi precedenti. Solo negli spermatozoi di cane le condizioni capacitanti inducono un cambiamento nella distribuzione dei GLUT, anche se il ruolo fisiologico di questi cambiamenti deve essere ancora approfondito.
31
Berglind, Henrik Oförstörande provning. "Nondestructive detection of glue deficiency in laminated wood using thermography /." Luleå, 2003. http://epubl.luth.se/1402-1544/2003/02.
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Deng, James X. "Strength of Epoxy Bonded Steel Connections in Glue Laminated Timber." University of Canterbury. Civil Engineering, 1997. http://hdl.handle.net/10092/8262.
Full textAbstract:
In New Zealand, there has been little use of epoxy bonded steel connections in the timber construction industry due to the lack of knowledge and experiences about the performance. A research was carried out both experimentally and theoretically to study the epoxy bonded steel connections in glue laminated timber. This research provides a better understanding of the mechanical and physical properties of such connections in tension, subjected to short and long duration load, with variables of embedment length, bar diameter, edge distance, hole diameter, moisture content, steel bar type and epoxy type.
In the study, five different failure modes were identified. A theoretical three dimensional model was established using a finite element method. The characteristics of the connection, the three dimensional stress distributions and the effect of the variables in the connections were studied using this model. The study shows that there is a strong correlation between the failure modes and the stress concentrations. It is possible to optimise the design of the connections by developing a better geometry.
The study also shows that the connections can be used safely in timber structures provided the moisture content of wood does not exceeding 22%.
Empirical equations were developed to predict the axial capacity of the connection in tension or compression.
33
O'Connor, D. J. "Glue sniffing and volatile solvent abuse by schoolchildren and adolescents." Thesis, University of Newcastle Upon Tyne, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.378847.
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Sousa, Liza Margareth Medeiros de Carvalho. "Hipóxia e luteólise em cadelas não prenhes." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/10/10132/tde-06082013-140336/.
Full textAbstract:
Com o intuito de investigar se a hipóxia representa um dos desencadeadores da regressão luteínica em cadelas não prenhes, o presente estudo foi delineado para analisar a expressão do fator transcricional indutível por hipóxia HIF1A e a de seus genes-alvo relacionados à angiogênese, como o fator de crescimento endotelial vascular (VEGFA) e à captação de glicose, como as proteínas transportadoras facilitadoras GLUT1/SLC2A1 e GLUT4/SLC2A4 no corpo lúteo canino ao longo do diestro (dias 10 a 70 após a ovulação). Para tal, utilizou-se imuno-histoquímica e western blotting para localizar e quantificar as proteínas do HIF1A, GLUT1 e GLUT4 e PCR em tempo real para quantificar a expressão do RNAm de HIF1A, SLC2A1, SLC2A4, VEGFA, FLT1 e KDR. Além disso, células luteínicas nas fases inicial (dia 10), média (dia 30) e final (dia 60) foram submetidas ao tratamento com cloreto de cobalto (CoCl2) a 500 µM para avaliar os efeitos da hipóxia sobre a expressão gênica dos fatores acima citados, bem como sobre a produção de progesterona e 17β-estradiol. Nossos resultados demonstraram que o HIF1A é expresso pelo corpo lúteo canino de maneira tempo-dependente ao longo do diestro, e que a expressão de seu RNAm está diretamente correlacionada a expressão gênica de SLC2A1, SLC2A4, VEGFA, FLT1 e KDR e com as concentrações de progesterona periférica. No cultivo primário de células luteínicas, a hipóxia induzida pelo CoCl2 diminuiu a produção de progesterona e de 17β-estradiol e estimulou significativamente a expressão de HIF1A, SLC2A1, SLC2A4 e VEGFA. Esses resultados sugerem que o HIF1A constitui um dos fatores regulatórios da função do corpo lúteo canino participando da modulação de processos como esteroidogêne, angiogênese e da captação de glicose, atuando como fator luteolítico.This study was designed to investigate if hypoxia is one of the triggers of luteal regression in non-pregnant bitches. For that, we analyzed the hypoxia- inducible factor (HIF1A) expression as well as the expression of its target genes related to angiogenesis (vascular endothelial growth factor VEGFA) and to glucose uptake (glucose transporters GLUT/SLC2A 1 and 4) in canine corpus luteum throughout diestrus (days 10 to 70 after ovulation). We used immunohistochemistry and western blotting to localize and quantify the protein expression of HIF1A, GLUT1 and GLUT4, respectively, and real time PCR to analyze HIF1A, SLC2A1, SLC2A4, VEGFA, FLT1 and KDR gene expression. Moreover, luteal cells from early (day 10), mid (day 30) and late luteal phase (day 60) were submitted to 500 µM cobalt chloride (CoCl2) treatment to verify hypoxia effects on gene expression of the above cited genes and on progesterone and 17β-estradiol production. Our results showed that luteal cells expressed HIF1A in a time-dependent manner over diestrus and that its expression was directly correlated to both SLC2A1, SLC2A4, VEGFA, FLT1 and KDR gene expression and progesterone production. The protein expression of the studied genes also changed over diestrus and was correlated with the respective gene expression. In primary luteal cells culture, cobalt chloride-induced hypoxia downregulated progesterone and 17β-estradiol production, but upregulated HIF1A, SLC2A1, SLC2A4 and VEGFA gene expression. These findings suggest that HIF1A is one of the factors regulating canine luteal function by modulating important process as steroidogenesis, angiogenesis and glucose uptake, acting as a pro-survival factor.
35
Baskota, Karki Subheksha, and Hans Freij. "New fast connection for a building system based on green-glued boards." Thesis, Linnéuniversitetet, Institutionen för teknik, TEK, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:vxu:diva-5472.
Full textAbstract:
Växjö university has together with Södra developed a new green-glued laminated beam, which to be used in a building system. To make a product of the beam it is desired to also develop a building system based on the beam. An important part of such a building system is the connections. The main aim of the thesis was to design a new beam-to-beam connection in for the new green-glued laminated boards. This thesis is about to develop and test a new connection for a beam-to-beam connection in the building system. The requirements set on the connection was that it should be used in an office building with a beam length of 6 m, the connection should be fast to assemble and invisible. The report thoroughly describes the conceptual design, the development and test of the connection. Five different types of connections were designed in the conceptual design phase. One of these connections fulfilled the requirements and was taken to the development and testing phase. Three versions of the connection were tested. The report describes how the green-glued laminated beams with the connections were tested in a testing machine until the failure occurs. The developed connection could fulfil the requirements set on the connection. One version of the connection was even stronger than the green-glued laminated beams.
36
HEIDINGER, VALERIE. "Excitotoxicite retinienne : reponses cellulaires et implication des interactions neurones-glies (doctorat : sciences)." Strasbourg 1, 1998. http://www.theses.fr/1998STR15040.
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Al-Djaber, Jafar. "Prestressed glue laminated beams reinforced with steel plates : Comparison between prestressed, reinforced and non-reinforced glue laminated beams according to the Eurocode and the Swedish annex." Thesis, KTH, Bro- och stålbyggnad, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-236059.
Full textAbstract:
The paper presents details of a numerical analysis and simplified construction of strengthened glue laminated beams. Glue laminated beams are strengthened through the use of steel reinforcements embedded between the lamellas of the beams. The study compares the numerical results from reinforced and prestressed beams, simply reinforced beams and non-modified beams. Parametric studies were undertaken to evaluate the effects on reinforcement thickness, beam span, prestressing force and prestressing loss. Modified and prestressed beams with wide spans and large dimensions had a significantly higher design load compared to non-modified beams with similar geometry and span. In the most beneficial cases, a load increase of 438% was observed for point load at midspan and 346% for uniformly distributed load.
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Bjurman, Therese. "Waste from glued wood - A base for new products and/or bio-fuel?" Thesis, Linköping University, Linköping University, Energy Systems, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-17426.
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The Swedwood Company is a supplier to IKEA of wood furniture. They have grown larger concurrently with IKEA and at present they have 47 production units spread over twelve countries of which most are located in Eastern Europe.
One of the factories is Zbaszynek which is located in Poland. They manufacture so called board-on-frame furniture. A board-on-frame is basically made out of particle board frames which are filled with special design paper that enfolds air. The frames are then covered with their skin; thinner particle boards, so called High Density Fibre (HDF) boards, and then edge banded with plastic stripes and painted and lacquered into desired design.
This production generates not only furniture, last financial year Zbaszynek generated about 61 000 tons wood waste too. It can be compared to their total production of furniture which reached 439 000 tons during the same period of time. This generation of wood waste has caused a problem for Swedwood in general. A project called IKEA Goes Renewable (IGR) has started within IKEA with the aim to reduce the electric- and heat energy consumption and increase the use of renewable energy sources. But to be able to reduce the heat energy at a board-on-frame factory, such as Zbaszynek, there has to be an economic incentive to do so. But the wood waste is contaminated in comparison with waste from pure wood (free from adhesives, plastics etc.) so purchasers have been hard to find. And since the wood waste is used to generate the heat at the factories, the economic value has become relative low. Zbaszynek earn 1.4 €/MWh for their wood waste at present (energy value of 5.1 MWh/ton), while for example recycled contaminated wood chippings (RT-chippings) are worth about 7.3 €/MWh in Sweden (energy value of 4.4-5.1 MWh/ton). RT-chippings in Sweden are even allowed to contain more contaminations to receive that price, as long as it is not pressure creosoted. 1.4 €/MWh can also be compared to the economic value of coal which is about 13.7 €/MWh, and for district heating to households in Sweden was the average price about 68 €/MWh during 2007 (Energimarknadsinspektionen, 2007).Therefore, the main task of this thesis has been to investigate if there are any possible solutions to increase the economic value of the wood waste in Zbaszynek. There are more board-on-frame factories within Swedwood with the same problem, but Zbaszynek has been the pilot factory during this research.
The first thing which should be considered in Zbaszynek is to keep the amount of waste as low as possible. The main task should be to reduce the amounts of wood waste; in the end it is a furniture factory and not a waste producer, which should be concerned before taking any further action. It is assumed though that this has already been thought through in Zbaszynek and further investigation of the waste has taken place.The wood waste has been sent to the Eurofins laboratory in Sweden for an analysis and the test results were then compared to wood waste of pure wood. The comparison indicates the nitrogen content being the main difference between Zbaszynek's wood waste and pure wood. Nitrogen compounds, often referred to as NOx can cause severe damage to the environment and foremost lead to increased eutrophication (= Eutrofizacja (Polish) / Övergödning (Swedish)) when it is emitted to the air. Apart from the nitrogen contamination, other significant differences have not been found. The energy content of the wood waste has even revealed it would suit well as bio-fuel, on the condition that proper equipment to reduce the NOx emissions is present. It has been calculated that the energy content, of the generated wood waste in Zbaszynek during Financial Year 2008, reached 310 GWh. Which can be compared to the electricity consumption of 78 GWh as was bought during the same time of period.
Four main possibilities have been investigated in this report and they are:
- Selling the waste to cement producers as alternative fuel
- Make new products and use for furniture production again
- Make briquettes or pellets and sell as fuel
- Start up a Combined Heat and Power plant and produce electricity
All these alternatives have their advantages and disadvantages but they all seem to be realistic solutions, on a few conditions.
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Pooser, Eric J. "The GlueX Start Counter & Beam Asymmetry $\Sigma$ in Single $\pi^{0}$ Photoproduction." FIU Digital Commons, 2016. http://digitalcommons.fiu.edu/etd/2450.
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The GlueX experiment aims to study meson photoproduction while utilizing the coherent bremsstrahlung technique to produce a 9 GeV linearly polarized photon beam incident on a liquid $\mathrm{H_{2}}$ target. A Start Counter detector was fabricated to properly identify the accelerator electron beam buckets and to provide accurate timing information. The Start Counter detector was designed to operate at photon intensities of up to $\mathrm{10^{8}\gamma/s}$ in the coherent peak and provides a timing resolution $\mathrm{\sim 300\ ps}$ so as to provide successful identification of the electron beam buckets to within 99\% accuracy. Furthermore, the Start Counter detector provides excellent solid angle coverage, $\sim 90 \%\ \mathrm{of}\ 4 \pi\ \mathrm{hermeticity}$, and a high degree of segmentation for background rejection. It consists of a cylindrical array of 30 scintillators with pointed ends that bend towards the beam at the downstream end. Magnetic field insensitive silicon photomultiplier detectors were selected as the readout system.
An initial measurement of the beam asymmetry $\Sigma$ in the exclusive reaction $\vec{\gamma}p \rightarrow \pi^{0}p$, where $\pi^{0} \rightarrow \gamma \gamma$ has been carried out utilizing the GlueX spectrometer during the Spring 2015 commissioning run. The tagged photon energies ranged from $2.5 \leq E_{\gamma} \leq 3.0\ \mathrm{GeV}$ in the coherent peak. These measurements were then compared to the world data set and show remarkable agreement with only two hours of physics production running.
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González, Barillas Enrique. "Performance of timber connections with single and multiple glued-in threaded steel rods." Thesis, University of British Columbia, 2015. http://hdl.handle.net/2429/54217.
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The experimental research conducted within this thesis project focused on joints composed of softwood glulam members and mild steel glued-in threaded rods. In a first phase, the influence of the embedment length and the rod diameter using three different adhesives was studied to establish performance benchmarks. In the second phase, the investigation focused on the influence of manufacturing defects on the capacity of timber joints with glued-in steel rods. For this purpose, timber joints were manufactured with two different types of defects likely to be encountered during their manufacturing on-site: i) rods placed at an angle to the drill hole instead of being in the joint axis, and ii) rod placed at the edge of the drill hole instead of fully centred. Finally, in the third phase, joints with multiple rods (two, three and four rods) were manufactured and tested. The adhesive type and rod diameter were kept constant and the embedment length and the spacing between rods were varied during this phase. In all phases of this experimental campaign, specimens were tested under uniaxial quasi-static tension loading. The results showed that, for single glued-in rod joints using mild steel threaded rods, a ductile-type of failure can be consistently attained if the embedment length of the rod is long enough (>10d). Furthermore, the results for specimens with bonding defects considered in this study had no significant negative impact on the capacity of the joints if compared to the results obtained in the first experimental phase. Finally, a spacing between rods greater than four times the rod diameter demonstrated to be sufficient to facilitate a ductile steel yielding failure as long as the joints were manufactured with sufficient embedment length (>10d). The results from this study can contribute towards better understanding of the influence that the parameters under investigation have on the performance on timber joints with glued-in rods, as well as to translate this information to promote the development of more studies on further applications such as moment resisting connections.Applied Science, Faculty of
Civil Engineering, Department of
Graduate
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Xiong, Pingbo. "Modelling strength and stiffness of glued-laminated timber using machine stress rated lumber." Thesis, University of British Columbia, 1991. http://hdl.handle.net/2429/29824.
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A localized E-simulation model and a strength simulation model, which are based on the theories of stationary random process and the bivariate standard normal distribution, have been developed.
A group of 2x6 2100f-1.8E SPF MSR lumber have been tested to obtain the within-board compressive strengths. The test E-profiles and compressive strength data was used to provide the statistical information for E-simulation model and σ-simulation model.
The comparison between the within-board compressive strength test data and the simulation results shows that the E-simulation approach and the σ-simulation approach can model the localized stiffness and strength behaviours satisfactorily.
Using E-simulation model and σ-simulation model three grades of MSR lumber have been generated with localized MOE, tension strength and compression strength profiles on each board. With these generated MSR lumbers, different sizes and layups of glulam beams have been built and the effect of beam sizes and layups on the strength of glulam beams has been simulated.
The results obtained from glulam beam simulation showed that the beam sizes and layups did have significant effect on the beam strength properties. With one or two layers of higher grade lamination on the outer layer of the beam and lower grade laminations in the rest of inner layers of the beam, the glulam beam bending strength could be improved significantly.Forestry, Faculty of
Graduate
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Lamann-Glees, Alexandra Rebecca [Verfasser]. "Strukturelle und spektroskopische Untersuchungen an Koordinationspolymeren mit para-Aminobenzonitril / Alexandra Rebecca Lamann-Glees." München : Verlag Dr. Hut, 2012. http://d-nb.info/1023435233/34.
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Davalos, Julio F. "Background for finite element analysis and experimental testing of glued-laminated space beams." Thesis, Virginia Polytechnic Institute and State University, 1987. http://hdl.handle.net/10919/101180.
Full textAbstract:
Two straight and one curved Southern Pine glued-laminated beams are subjected to bending, bending and compression, and biaxial bending. The beams are tested at service loads and only one beam is loaded to failure. The analysis is performed by using the finite element program ABAQUS.
The 3-D beam finite element model used is formulated on engineering theory and includes shear deformations. The engineering elastic constants needed to specify the constitutive matrix of the beam element are obtained experimentally.
Strain measurements in wood with small bonded strain gages are not accurate. A simple clip-type transducer is fabricated and used to measure the strains in the test glulam beams.
The distribution of normal stresses is investigated for symmetrically applied concentrated loads. Experimental and analytical values agree very well.M.S.
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Deng, Xixian. "Strength of the epoxy bonded steel connection in glue laminated timber." Thesis, University of Canterbury. Civil Engineering, 1996. http://hdl.handle.net/10092/7510.
Full textAbstract:
In New Zealand, there has been little use of epoxy bonded steel connections in the timber construction industry due to the lack of knowledge and experiences about the performance. A research was carried out both experimentally and theoretically to study the epoxy bonded steel connections in glue laminated timber. This research provides a better understanding of the mechanical and physical properties of such connections in tension, subjected to short and long duration load, with variables of embedment length, bar diameter, edge distance, hole diameter, moisture content, steel bar type and epoxy type.
In the study, five different failure modes were identified. A theoretical three dimensional model was established using a finite element method. The characteristics of the connection, the three dimensional stress distributions and the effect of the variables in the connections were studied using this model. The study shows that there is a strong correlation between the failure modes and the stress concentrations. It is possible to optimise the design of the connections by developing a better geometry.
The study also shows that the connections can be used safely in timber structures provided the moisture content of wood does not exceeding 22%.
Empirical equations were developed to predict the axial capacity of the connection in tension or compression.
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Tan, Yu-Eng. "Critical parameters affecting the use of Chengal for structural glue-lamination." Thesis, University of Brighton, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.387814.
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Ong, Chee Beng. "Performance of glue-laminated beams from Malaysian Dark Red Meranti timber." Thesis, University of Bath, 2018. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.760973.
Full textAbstract:
In this study, Malaysian Dark Red Meranti (DRM) was used to manufacture glulam beams, following closely the requirements of BS EN 14080:2013 so as to emulate commercial production. Phenol resorcinol formaldehyde (PRF), commonly used in structural glulam production, was used in the fabrication of finger joints and laminations of the glulam beams. Factors influencing the mechanical properties of finger joints and bonding performance of laminations were investigated. Full size glulam beams were manufactured and tested in bending with partial and complete carbon fibre reinforced polymer (CFRP) reinforcement on the tension face and compared with the performance of unreinforced beams. A bench-scale fire test was proposed to describe the behaviour of DRM finger joints in tension under fire condition, in order to simulate the failure of finger joints on the tension side of a glulam beam in a standard fire test. Overall, DRM finger joints exhibited better bending strength than Spruce finger joints which represented softwood used in European glulam. Wood density and end pressure were shown to affect the strength properties of the finger joints. Higher cramping pressure was needed to produce DRM laminations with higher shear strength. The glulam beam with CFRP reinforcement had a higher bending strength than the unreinforced glulam beams but partial reinforcement had an adverse effect on beam strength. In the bench-scale fire test, DRM finger-jointed specimens exhibited lower charring rate than Spruce. Furthermore, PRF finger-jointed specimens showed better fire performance than finger-jointed specimens bonded with polyurethane (PUR) adhesive. In conclusion, it is hoped that results from this research will motivate engineers and architects in Malaysia to design and build structures from less-utilised local timber, specifically in the form of glulam, encouraging the timber industry in Malaysia to produce them commercially.
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Hakariya, Hayase. "Non-Genetic Cell-Surface Modification with a Self-Assembling Molecular Glue." Doctoral thesis, Kyoto University, 2021. http://hdl.handle.net/2433/263577.
Full textAbstract:
付記する学位プログラム名: 充実した健康長寿社会を築く総合医療開発リーダー育成プログラム京都大学
新制・課程博士
博士(医科学)
甲第23116号
医科博第127号
京都大学大学院医学研究科医科学専攻
(主査)教授 藤田 恭之, 教授 渡邊 直樹, 教授 岩田 想
学位規則第4条第1項該当
Doctor of Medical Science
Kyoto University
DFAM
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Seele, Joseph. "Constraining the polarization of the proton's glue with the eta meson." Connect to online resource, 2008. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3337153.
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Seibt, Ana Carolina. "Modelagem hidrológica da bacia hidrográfica do Córrego Botafogo – Goiânia – Go." Universidade Federal de Goiás, 2013. http://repositorio.bc.ufg.br/tede/handle/tede/3221.
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Conselho Nacional de Pesquisa e Desenvolvimento Científico e Tecnológico - CNPq
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES
The numerous problems arising from the increased amount of impermeable areas and drainage system of rainwater lagged consist of a hard challenge for public administrations. The hydrological modeling appears as a strong support engineering, however, is subject to a distinct set of constraints rarely explicitly considered by analysis of uncertainty to the results. The present study aims to highlight the role of hydrological modeling through a model transformation process for rainfall-runoff watershed stream Botafogo (Goiania - GO), called UFGModel1.0 and ascertain the uncertainty analysis applied in simulation flows. To achieve the goal, after exposure of the problem, we propose a methodology for uncertainty analysis using the Monte Carlo method, based on the method of estimation uncertainty GLUE. We stress the importance given in consideration of the precipitation fields, and the effect of simplifying the response of a model of a precipitation-runoff. The results demonstrate that multiple sets of parameters were considered excellent high efficiency enabling a model for events intense precipitation. Parameters studied concluded that the sealed area holds great sensitivity, significantly altering the design flow.
Os inúmeros problemas advindos do aumento da quantidade das áreas impermeabilizadas e do sistema de drenagem das águas pluviais defasado consistem em um árduo desafio para as gestões públicas. A modelagem hidrológica aparece como um forte suporte da engenharia, porém, está sujeita a um conjunto de restrições distintas, raramente consideradas explicitamente através da análise de incerteza associada aos resultados obtidos. O presente trabalho propõe-se a ressaltar o papel desempenhado pela modelagem hidrológica através de um modelo de transformação do processo precipitação-vazão para bacia hidrográfica do córrego Botafogo (Goiânia – GO), denominado de UFGModel1.0 e averiguar a análise de incerteza aplicada na simulação de vazões. Para o cumprimento do objetivo, após a exposição do problema, propõe-se uma metodologia de análise da incerteza através do método de Monte Carlo, baseada no método de estimação de incerteza GLUE. Ressalta-se a importância dada em consideração aos campos de precipitação, e ao efeito de sua simplificação na resposta de um modelo do tipo precipitação-vazão. Os resultados obtidos demonstram que vários conjuntos de parâmetros foram considerados ótimos possibilitando uma alta eficiência do modelo para eventos intensos de precipitação. O modelo apresentou maior sensibilidade ao parâmetro de área impermeabilizada e Manning do plano.
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Patrick, G. "The structural performance of FRP reinforced glued laminated beams made from homegrown Sitka spruce." Thesis, Queen's University Belfast, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.403485.
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