Dissertations / Theses on the topic 'Walli'

Western researchers conducting studies with Somali refugee participants have identified Somali-specific idioms of psychological distress as well as high rates of Western psychological disorders such as depression and post-traumatic stress disorder (PTSD) in this refugee group. Methodological limitations of these previous studies, however, have limited the validity of the conclusions drawn. These limitations include the use of Western psychometric instruments and diagnostic nosologies, limited information about the methodological procedures undertaken, the apparently unqualified use of terms such as mental illness, madness and craziness in interview schedules, minimal exploration of psychosomatic idioms of distress, and limited applicability of some of the research findings to Somali women.. The current research primarily aimed to address these methodological short-comings and build on the findings of previous studies that have explored Somali conceptions of distress. Two additional objectives were to (i) identify protective and resilience factors which may decrease vulnerability to experiencing psychological distress in Somali women, (ii) gauge non-Somali health professionals' understanding of (a) the nature of distress and suffering experienced by Somali women, and (b) effective treatment modalities to ameliorate this distress. The analytical style employed in all three studies of this thesis was thematic. In the first study, ten Hamilton (New Zealand) based Somali women were interviewed. Particular areas of interest explored in the first study included psychological, physical and spiritual conceptions of distress, the symptoms of key idioms of distress, and the way in which these are managed/treated at the individual, community, and family levels. The findings of Study 1 identified spirit (jinn) possession as a form of distress known by at least some members of the local Somali community. Jinn appeared to be an explanation for both milder forms of distress akin to depression and anxiety, as well as more severe forms of distress similar to psychosis. Treatment for jinn possession tended to focus on Koran readings in conjunction with family and community-based support. Generally participants considered there was a very limited role for mental health professionals and Western psychiatric medication in the extraction of jinn. Faith was considered a key protective factor against experiencing non-spiritual forms of distress such as stress, worry, anxiety and depression. Although war trauma was acknowledged to have an adverse impact on the psychological functioning of Somali women it was not considered to impact on a woman's ability to manage her day-to-day responsibilities. The impact of having family in refugee camps in Africa was, however, identified as a common and very distressing issue impacting on many Somali women. The only way of alleviating the distress associated with this stressor, according to participants, was reunification. Interviewees stated that Western interventions for distress were rarely pursued by Somali as they were not considered efficacious. Given there is evidence that Somali communities residing in various cities in New Zealand are at various stages of acculturation, it was considered important to ascertain how valid the results from Study 1 were considered to be by women from other Somali communities. Six focus groups were conducted with a total of 27 Somali women recruited from three New Zealand cities. The findings of Study 2 identified numerous culturally specific forms of distress reported by participants. These states were qalbijab, boofis, murug, welwel and jinn. These Somali idioms of distress were akin to some Western psychological disorders, particularly the depression and anxiety spectrums. Treatment for Somali forms of suffering were reported to focus on Koran readings, in addition to family and community support. Generally, participants in Study 2 considered there was a very limited role for general practitioners (GPs) and mental health professionals in assisting Somali to deal with psychological and spiritual distress. Consistent with the findings of Study 1, faith was considered the most important protective factor, family separation was described as one of the most significant stressors, and war related trauma was suggested to cause significant distress only if the sufferer had family still in Africa. Study 3 explored non-Somali health practitioners' understanding of Somali idioms of distress, as well as their perspectives about how to best treat Somali presenting with psychological distress. A total of 18 mainstream mental health practitioners, general health practitioners (both GPs and primary care nurses), and specialist refugee mental health practitioners took part in this research. Few practitioners mentioned spirit possession as an aetiology for distress and none mentioned other Somali-specific forms of distress. The psychosocial stressors identified as contributing to the psychological distress of Somali women were relatively consistent across the three groups of practitioners and also consistent with the stressors identified by participants in Studies 1 and 2 (e.g., family separation, social isolation, financial concerns). Interviewees did not consider PTSD to be a common psychological disorder amongst Somali women living in New Zealand. Advocacy work and assistance with day-to-day concerns were suggested by many participants as more efficacious for the amelioration of psychosocial stressors than medication-based treatment. Generally, participants in Study 3 were supportive of traditional forms of healing being used as the treatment of choice by Somali clients. The findings of the current thesis suggest that there are clear parallels between Somali idioms of distress and those of Western cultures. However, the data indicate that equating Somali idioms with Western diagnostic labels would be rejected by Somali. Regardless of the similarity of symptom profile of some of the Somali states to Western states, the manner in which these states are conceptualised, understood and treated is markedly different. The findings of all three studies suggested that Somali tend to opt for their own traditional interventions to treat psychological and spiritual forms of distress rather than engage with Western mental health services. Numerous barriers including long waiting lists, mental health practitioners' apparent lack of knowledge/expertise working cross-culturally and poor treatment outcomes were provided for Somali not engaging with such services. The stigma attached to having a mental illness was also considered a barrier to engaging with mental health services. With respect to improving service provision for non-Western clients, an intermediate service that sits between primary and secondary health care agencies is recommended as an effective means of meeting the needs of non-Western clients experiencing psychosocial stressors and mild to moderate psychological distress. It is imperative, however, that any such service involves key stakeholders from the community groups it would serve, in the design, development, and implementation of interventions.

Abstract Aragonite is a minor secondary mineral in many limestone caves throughout the world. It has been claimed that it is the second-most common cave mineral after calcite (Hill & Forti 1997). Aragonite occurs as a secondary mineral in the vadose zone of some caves in New South Wales. Aragonite is unstable in fresh water and usually reverts to calcite, but it is actively depositing in some NSW caves. A review of current literature on the cave aragonite problem showed that chemical inhibitors to calcite deposition assist in the precipitation of calcium carbonate as aragonite instead of calcite. Chemical inhibitors work by physically blocking the positions on the calcite crystal lattice which would have otherwise allowed calcite to develop into a larger crystal. Often an inhibitor for calcite has no effect on the aragonite crystal lattice, thus aragonite may deposit where calcite deposition is inhibited. Another association with aragonite in some NSW caves appears to be high evaporation rates allowing calcite, aragonite and vaterite to deposit. Vaterite is another unstable polymorph of calcium carbonate, which reverts to aragonite and calcite over time. Vaterite, aragonite and calcite were found together in cave sediments in areas with low humidity in Wollondilly Cave, Wombeyan. Several factors were found to be associated with the deposition of aragonite instead of calcite speleothems in NSW caves. They included the presence of ferroan dolomite, calcite-inhibitors (in particular ions of magnesium, manganese, phosphate, sulfate and heavy metals), and both air movement and humidity. Aragonite deposits in several NSW caves were examined to determine whether the material is or is not aragonite. Substrates to the aragonite were examined, as was the nature of the bedrock. The work concentrated on Contact Cave and Wiburds Lake Cave at Jenolan, Sigma Cave, Wollondilly Cave and Cow Pit at Wombeyan and Piano Cave and Deep Hole (Cave) at Walli. Comparisons are made with other caves. The study sites are all located in Palaeozoic rocks within the Lachlan Fold Belt tectonic region. Two of the sites, Jenolan and Wombeyan, are close to the western edge of the Sydney Basin. The third site, Walli, is close to a warm spring. The physical, climatic, chemical and mineralogical influences on calcium carbonate deposition in the caves were investigated. Where cave maps were unavailable, they were prepared on site as part of the study. %At Jenolan Caves, Contact Cave and Wiburds Lake Cave were examined in detail, %and other sites were compared with these. Contact Cave is located near the eastern boundary of the Late Silurian Jenolan Caves Limestone, in an area of steeply bedded and partially dolomitised limestone very close to its eastern boundary with the Jenolan volcanics. Aragonite in Contact Cave is precipitated on the ceiling as anthodites, helictites and coatings. The substrate for the aragonite is porous, altered, dolomitised limestone which is wedged apart by aragonite crystals. Aragonite deposition in Contact Cave is associated with a concentration of calcite-inhibiting ions, mainly minerals containing ions of magnesium, manganese and to a lesser extent, phosphates. Aragonite, dolomite and rhodochrosite are being actively deposited where these minerals are present. Calcite is being deposited where minerals containing magnesium ions are not present. The inhibitors appear to be mobilised by fresh water entering the cave as seepage along the steep bedding and jointing. During winter, cold dry air pooling in the lower part of the cave may concentrate minerals by evaporation and is most likely associated with the ``popcorn line'' seen in the cave. Wiburds Lake Cave is located near the western boundary of the Jenolan Caves Limestone, very close to its faulted western boundary with Ordovician cherts. Aragonite at Wiburds Lake Cave is associated with weathered pyritic dolomitised limestone, an altered, dolomitised mafic dyke in a fault shear zone, and also with bat guano minerals. Aragonite speleothems include a spathite, cavity fills, vughs, surface coatings and anthodites. Calcite occurs in small quantities at the aragonite sites. Calcite-inhibitors associated with aragonite include ions of magnesium, manganese and sulfate. Phosphate is significant in some areas. Low humidity is significant in two areas. Other sites briefly examined at Jenolan include Glass Cave, Mammoth Cave, Spider Cave and the show caves. Aragonite in Glass Cave may be associated with both weathering of dolomitised limestone (resulting in anthodites) and with bat guano (resulting in small cryptic forms). Aragonite in the show caves, and possibly in Mammoth and Spider Cave is associated with weathering of pyritic dolomitised limestone. Wombeyan Caves are developed in saccharoidal marble, metamorphosed Silurian Wombeyan Caves Limestone. Three sites were examined in detail at Wombeyan Caves: Sigma Cave, Wollondilly Cave and Cow Pit (a steep sided doline with a dark zone). Sigma Cave is close to the south east boundary of the Wombeyan marble, close to its unconformable boundary with effusive hypersthene porphyry and intrusive gabbro, and contains some unmarmorised limestone. Aragonite occurs mainly in a canyon at the southern extremity of the cave and in some other sites. In Sigma Cave, aragonite deposition is mainly associated with minerals containing calcite-inhibitors, as well as some air movement in the cave. Calcite-inhibitors at Sigma Cave include ions of magnesium, manganese, sulfate and phosphate (possibly bat origin), partly from bedrock veins and partly from breakdown of minerals in sediments sourced from mafic igneous rocks. Substrates to aragonite speleothems include corroded speleothem, bedrock, ochres, mud and clastics. There is air movement at times in the canyon, it has higher levels of CO2 than other parts of the cave and humidity is high. Air movement may assist in the rapid exchange of CO2 at speleothem surfaces. Wollondilly Cave is located in the eastern part of the Wombeyan marble. At Wollondilly Cave, anthodites and helictites were seen in an inaccessible area of the cave. Paramorphs of calcite after aragonite were found at Jacobs Ladder and the Pantheon. Aragonite at Star Chamber is associated with huntite and hydromagnesite. In The Loft, speleothem corrosion is characteristic of bat guano deposits. Aragonite, vaterite and calcite were detected in surface coatings in this area. Air movement between the two entrances of this cave has a drying effect which may serve to concentrate minerals by evaporation in some parts of the cave. The presence of vaterite and aragonite in fluffy coatings infers that vaterite may be inverting to aragonite. Calcite-inhibitors in the sediments include ions of phosphate, sulphate, magnesium and manganese. Cave sediment includes material sourced from detrital mafic rocks. Cow Pit is located near Wollondilly Cave, and cave W43 is located near the northern boundary of the Wombeyan marble. At Cow Pit, paramorphs of calcite after aragonite occur in the walls as spheroids with minor huntite. Aragonite is a minor mineral in white wall coatings and red phosphatic sediments with minor hydromagnesite and huntite. At cave W43, aragonite was detected in the base of a coralloid speleothem. Paramorphs of calcite after aragonite were observed in the same speleothem. Dolomite in the bedrock may be a source of magnesium-rich minerals at cave W43. Walli Caves are developed in the massive Belubula Limestone of the Ordovician Cliefden Caves Limestone Subgroup (Barrajin Group). At the caves, the limestone is steeply bedded and contains chert nodules with dolomite inclusions. Gypsum and barite occur in veins in the limestone. At Walli Caves, Piano Cave and Deep Hole (Deep Cave) were examined for aragonite. Gypsum occurs both as a surface coating and as fine selenite needles on chert nodules in areas with low humidity in the caves. Aragonite at Walli caves was associated with vein minerals and coatings containing calcite-inhibitors and, in some areas, low humidity. Calcite-inhibitors include sulfate (mostly as gypsum), magnesium, manganese and barium. Other caves which contain aragonite are mentioned. Although these were not major study sites, sufficient information is available on them to make a preliminary assessment as to why they may contain aragonite. These other caves include Flying Fortress Cave and the B4-5 Extension at Bungonia near Goulburn, and Wyanbene Cave south of Braidwood. Aragonite deposition at Bungonia has some similarities with that at Jenolan in that dolomitisation of the bedrock has occurred, and the bedding or jointing is steep allowing seepage of water into the cave, with possible oxidation of pyrite. Aragonite is also associated with a mafic dyke. Wyanbene cave features some bedrock dolomitisation, and also features low grade ore bodies which include several known calcite-inhibitors. Aragonite appears to be associated with both features. Finally, brief notes are made of aragonite-like speleothems at Colong Caves (between Jenolan and Wombeyan), a cave at Jaunter (west of Jenolan) and Wellington (240\,km NW of Sydney).

This thesis is an investigation in taking the architectural element â wallâ and celebrating it in the design of a building.

Walls are necessary elements in the urban fabric, and as such, should be celebrated. They enrich the space that they surround and enrich that which surrounds them as part of the urban fabric.

The project involves first creating walls with presence, then enclosing them in a manner that reveres them, that preserves their significance and emphasizes their presence.
Master of Architecture

The origins of this project lie in a desire to understand the relationship that exists between light and architecture. Natural light has always played a role in the evolution of architecture, helping us make countless decisions about the things we build. From their siting to their plan, to the nature of their openings, our buildings have to a great extent been shaped by the sun and the moon. The project became a search for new ways for architecture to express the concious relationship that needs to exist among light, material, structure, and space....
Master of Architecture

The main objective of the study is to verify the accuracy of the approximate hand calculation method used extensively by the engineers for the calculation of the rigidity of shear walls with openings. Different types of shear walls are considered varying in the dimensions and positions of the opening, however, maintaining the same basic material properties. The results obtained by the hand calculation are compared to the finite element approach to check for the discrepancy. The finite element analysis software NISA/DISPLAY IV and SAP2000 is considered for the purpose.

In most design codes, infill walls are considered as non-structural elements and thus are typically neglected in the design process. The observations made after major earthquakes (Duzce 1999, L’Aquila 2009, Christchurch 2011) have shown that even though infill walls are considered to be non-structural elements, they interact with the structural system during seismic actions. In the case of heavy infill walls (i.e. clay brick infill walls), the whole behaviour of the structure may be affected by this interaction (i.e. local or global structural failures such as soft storey mechanism). In the case of light infill walls (i.e. non-structural drywalls), this may cause significant economical losses. To consider the interaction of the structural system with the ‘non-structural ’infill walls at design stage may not be a practical approach due to the complexity of the infill wall behaviour. Therefore, the purpose of the reported research is to develop innovative technological solutions and design recommendations for low damage non-structural wall systems for seismic actions by making use of alternative approaches. Light (steel/timber framed drywalls) and heavy (unreinforced clay brick) non-structural infill wall systems were studied by following an experimental/numerical research programme. Quasi-static reverse cyclic tests were carried out by utilizing a specially designed full scale reinforced concrete frame, which can be used as a re-usable bare frame. In this frame, two RC beams and two RC columns were connected by two un-bonded post tensioning bars, emulating a jointed ductile frame system (PRESSS technology). Due to the rocking behaviour at the beam-column joint interfaces, this frame was typically a low damage structural solution, with the post-tensioning guaranteeing a linear elastic behaviour. Therefore, this frame could be repeatedly used in all of the tests carried out by changing only the infill walls within this frame. Due to the linear elastic behaviour of this structural bare frame, it was possible to extract the exact behaviour of the infill walls from the global results. In other words, the only parameter that affected the global results was given by the infill walls. For the test specimens, the existing practice of construction (as built) for both light and heavy non-structural walls was implemented. In the light of the observations taken during these tests, modified low damage construction practices were proposed and tested. In total, seven tests were carried out: 1) Bare frame , in order to confirm its linear elastic behaviour. 2) As built steel framed drywall specimen FIF1-STFD (Light) 3) As built timber framed drywall specimen FIF2-TBFD (Light) 4) As built unreinforced clay brick infill wall specimen FIF3-UCBI (Heavy) 5) Low damage steel framed drywall specimen MIF1-STFD (Light) 6) Low damage timber framed drywall specimen MIF2-TBFD (Light) 7) Low damage unreinforced clay brick infill wall specimen MIF5-UCBI (Heavy) The tests of the as built practices showed that both drywalls and unreinforced clay brick infill walls have a low serviceability inter-storey drift limit (0.2-0.3%). Based on the observations, simple modifications and details were proposed for the low damage specimens. The details proved to be working effectively in lowering the damage and increasing the serviceability drift limits. For drywalls, the proposed low damage solutions do not introduce additional cost, material or labour and they are easily applicable in real buildings. For unreinforced clay brick infill walls, a light steel sub-frame system was suggested that divides the infill panel zone into smaller individual panels, which requires additional labour and some cost. However, both systems can be engineered for seismic actions and their behaviour can be controlled by implementing the proposed details. The performance of the developed details were also confirmed by the numerical case study analyses carried out using Ruaumoko 2D on a reinforced concrete building model designed according to the NZ codes/standards. The results have confirmed that the implementation of the proposed low damage solutions is expected to significantly reduce the non-structural infill wall damage throughout a building.

Plants colonised land 460 million years ago and charophytes represent the closest living relatives of land plants. The ability to live on land may depend on the presence of certain cell wall polysaccharides such as xyloglucan, a hemicellulose exclusively found in land plants (Popper and Fry, 2003). The cell walls of charophytes are poorly characterised. The aim of this project was to use biochemical techniques to characterise the cell wall polysaccharides of charophytic algae in relation to early land plant phylogeny. Hydrolysis of Coleochaete scutata and Chara vulgaris cell walls in 2 M trifluoroacetic acid yielded predominantly GalA, Gal, Glc and Man residues and also some Ara, Xyl and traces of Fuc and Rha. In addition, hydrolysis of Chara pectin revealed an abundance of an unusual monosaccharide, 3-O-methyl-D-galactose, which was structurally identified by a series of 1-D and 2D NMR spectroscopy by COSY, TOCSY, NOESY and HSQC. 3-O-Methyl-D-galactose is more commonly found in lycophyte cell walls where its presence has been suggested to be related to lycophytes’ evolutionarily isolated position (Popper et al., 2001). The newly discovered presence of 3-O-methyl-D-galactose in charophyte pectin suggests that this polymer may be more complex than previously thought. Coleochaete and Chara hemicellulose extracts were fractionated by anion-exchange chromatography into five classes. A strongly anionic fraction from Chara hemicellulose was found to be rich in Glc, Xyl, Gal and Fuc suggestive of a xyloglucan-like polysaccharide. However, XEG was unable to produce diagnostic xyloglucan oligosaccharides in either Coleochaete or Chara hemicelluloses. Xylanase and mannanase digestion of Coleochaete and Chara hemicelluloses gave xylan- and mannan-oligosaccharides. Furthermore, lichenase digestion of Coleochaete hemicellulose yielded an unusual octasaccharide composed of approximately equimolar xylose and glucose. My work has shown that charophyte cell walls are a source of undiscovered monosaccharides and potentially novel pectic and hemicellulosic domains which may have important functions in enabling the successful colonisation of land by plants.

This thesis looks at illegal public art produced on state built barrier walls. The focus is on the artist Ron English, and his artworks produced on the Berlin Wall, Israeli Barrier Wall, and Mexican Border Fence. I examine English’s works in their respective contexts of Cold War divisions, the Israeli/Palestinian conflict, and tensions at the border between United States and Mexico. I also situate English’s works in relation to other artworks produced on these barriers. I argue that English is doing something different from other barrier wall artists in his work in Palestine and Mexico, offering a framework for understanding the primary motivations and tactics behind barrier wall art and highlighting English’s unique contributions.

Granskande av ritningar, tidsplaner och kalkyler för referensprojektet Hus N i Växjö har hjälpt oss kartlägga skalväggars för- och nackdelar. Från intervjuer har vi sedan kunnat se liknelser och skillnader om vad olika yrkesfolk i samma bransch tycker, sedan därifrån dragit slutsatser. Det är inte alltid enkelt att avgöra vilken byggnadsmetod som är att föredra för att projektet ska vara kostnadseffektivt, prefabricerat eller platsbyggd. Faktorer som byggnadens konstruktion, årstid, arbetsmiljö, resurser, tid och kostnad ska ta hänsyns till.

Genom att planera bättre, öka förtillverkningen, skapa en bättre samverkan mellan byggherrar, konsulter, entreprenörer, underentreprenörer och materialleverantörer, så anser man allmänt att man kan öka industrialiseringen av byggandet. Då man kan få kortare byggtider och lägre totalkostnader.

 

Checking of blueprints, time plans and calculations for the reference project house-N in Växjö have helped us to map double walls' advantages and disadvantages. From interviews, we have seen similarities and difference what different people in same sector think, and how they make their conclusions. It is not always simple to decide the preferable building method in order to make the project cost-effective, prefabricated or suite-built. Factors such as the building's frame, season, work environment, resources, time and cost take considerations' to.

Through better planning, increase of prefabrication and achieving a better collaboration between developers, consultants, contractors, subcontractors and material suppliers, it is generally considered that it may increase the industrialization of the building. Then procurement of shorter construction times and lower overall costs can be achieved 

Thesis: Ph. D., Massachusetts Institute of Technology, Department of Materials Science and Engineering, 2017.
Cataloged from PDF version of thesis.
Includes bibliographical references (pages 155-168).
Magnetic based devices such as hard disk drives (HDDs) are widely used in the computer industry because of their high memory capacity, non-volatility and low cost compared to semiconductor-based solid state disk drives (SSDs). However, they also suffer from low energy efficiency and low speed, due to the requirement for mechanical motion in order to access the data. In my thesis, I will first give a brief introduction to the motivation and background in the study of magnetic domain walls (DWs), which have attracted great attention due to their ability to be moved by field and/or current and corresponding potential applications in high speed memory or logic devices. I will then discuss how to geometrically control the behaviors of DWs in a ferromagnetic nanowire. I will first discuss how natural geometry distortions such as edge tapering from sputtering on an undercut resist profile and wire width variation from the patterning process would affect DW behavior, including static configurations, stability and dynamics under current pulsing. I will then discuss how similar geometrical effects will affect the properties of materials with perpendicular magnetic anisotropy (PMA). The same geometry modulation will have different effects depending on the origin of the PMA. Such results are confirmed by observing the magnetic reversal process. Besides the study on 180DWs, we will then discuss the field and current effects on 360 degree DWs (360DWs), which have many unique properties compared to 180DWs and are an alternative candidate for DW based devices. I will then discuss control of 360DW behavior by designing a geometrical heterostructure. We have found that by utilizing the asymmetric Oersted field originated from the heterostructure, we are able to control the 360DWs depending on their chirality. The structure can function as a 360DW chirality filter, which provides extra freedom in DW-based applications. These studies were conducted by a combination of micromagnetic simulations and experimental implementations. Techniques being used including OOMMF micromagnetic simulations, Comsolfinite element simulations, electrical measurements, magnetic force microscopy and other characterization techniques.
by Jinshuo Zhang.
Ph. D.

The simplified wall design formulae specified in the Australian (AS3600) and American (ACI318) concrete standards are intended for the design of normal strength concrete load bearing walls supported at top and bottom only. These practical codes fail to recognise any contribution to load capacity from restraints on all four sides, and do not provide recommendations and design equations for walls with openings (window and door). Also the current code methods are not applicable to the design of walls with high strength concrete (f’c>65MPa) or high slenderness ratios (H/tw>30). In many practical situations wall panels are restrained on all four sides and have openings. In other cases, high strength concrete walls may have reduced their thickness leading to a high slenderness ratio. The recognition and inclusion of such factors lacking in the current codes would result in more reliable and applicable design methods. A total of forty-seven (47) reinforced concrete wall panels were tested in the laboratory in three stages. Seventeen (17) walls with one and two openings in one-way action were tested in Stage one and eighteen (18) identical walls in two-way action were tested in Stage two. In the first two stages, the test panels had slenderness ratios between 30 and 40 and were of higher concrete strengths from 50MPa to 100MPa, and were subjected to a uniformly distributed axial load with an eccentricity of tw/6. In addition to highlighting the experimental set-up, typical crack patterns, failure modes, load- deflection behaviour and ultimate loads were also reported in some detail. Finally twelve (12) wall panels were tested in Stage three to investigate the behaviour of concrete wall panels with various opening configurations including wide window and door type with asymmetric location. The test panels had a constant slenderness ratio of 30 and a concrete strength of 65MPa. The same eccentric loading was applied and the panels were tested in both one- and two-way action. Utilising these test results, an empirical formula predicting the ultimate load of walls with openings was proposed. A favourable comparison between the predicted results and the test data (including the present and other experimental test results) indicates that the proposed formula is accurate and reliable for use in design. A numerical study was also undertaken to verify the effectiveness of the Layered Finite Element Method (LFEM) in predicting the failure characteristics of reinforced concrete walls with openings. The LFEM was used to model, six (6) normal strength concrete walls tested by Saheb and Desayi and thirty-five (35) concrete wall panels with openings tested in this research. The ultimate loads, load-deflection responses up to failure, deflected shapes and crack patterns predicted by the LFEM were compared favourably to the experimental observations. The comparative study also confirmed that the LEFM is a reliable and effective numerical modelling technique for determining ultimate load capacity of high strength concrete walls with high slenderness ratio and various opening configurations. Upon verification, the LFEM was then used as an effective tool to undertake three parametric studies, on a wide range of opening configurations, slenderness ratios and concrete strengths. The purpose of these parametric studies was threefold: (1) to provide missing data that were not covered by the code methods and existing empirical formulae due to their limited scope; (2) to conduct LFEM simulations which helped to reduce the number of labour intensive and very costly laboratory tests; (3) to validate the performance of the proposed formula in predicting the load carrying capacity of wall panels with openings. In total, 20, 64 and 108 wall models were analysed respectively for three parametric studies. The study confirms the accuracy and reliability of both the LFEM and the proposed formula. To this end, both the LFEM and the proposed formula can be used as an effective tool for the analysis and design of normal and high strength concrete walls with openings and high slenderness ratios performing in both one-and two- way action.
Thesis (PhD Doctorate)
Doctor of Philosophy (PhD)
Griffith School of Engineering
Science, Environment, Engineering and Technology
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Domain walls may be treated as single entities that can be used to convey bits of information in potential magnetic memory devices such as magnetic logic and racetrack memory, which use controlled domain wall movement in complex magnetic nanowire networks. Greater understanding and control over certain aspects of their behaviour is required, however, before such devices can be realised. The structure of magnetic domain walls in ferromagnetic nanowires is both material and geometry dependent, thus providing an extremely large parameter space to explore. The structure and control of magnetic domain walls in permalloy nanostructures is investigated throughout this thesis using static and pulsed magnetic fields in combination with deliberately fabricated pinning features using Lorentz microscopy. The effect of an abrupt corner on the structure of domain walls is investigated with the use of a castellated wire geometry. Two different domain wall structures are observed at the corners of the wire, and a completely different domain wall is observed in a straight segment of the wire. Additionally, the reversal behaviour observed is entirely different depending on the direction of the applied field. Reproducibility experiments are also performed to asses the suitability of this geometry for potential use in magnetic memory applications. The ability to control the behaviour of both vortex and transverse domain walls in nanowires with deliberately fabricated defects is also explored, using a range of domain wall nucleation techniques. The magnetic spin structure of a vortex domain wall is completely different from a transverse domain wall and as a result their interaction with deliberately fabricated pinning sites differs greatly. Both domain wall types possess a chirality or sense of rotation. In wider wires however, transverse domain walls also possess an asymmetry which acts as an additional degree of freedom in the interaction with a trap. The result of both increasing and decreasing the wire width on a domain wall is investigated by patterning a single or double notch or anti-notch along a permalloy wire. The propagation of a magnetic domain wall along both a gently tapered and straight wire under the application of a pulsed magnetic field is also investigated, where a distorted vortex domain wall structure is observed to form. The distance a domain wall travels following the application of a short field pulse is measured and a lower limit of the velocity is calculated. Additionally, a domain wall is observed to undergo a number of changes in structure and chirality as it is moved along a wire under pulsed fields. The wire edge roughness also has a significant effect on the domain wall propagation velocity and focused ion beam irradiation is utilised to smooth the wire edges.

[Truncated abstract] The feasibility of using interlocked light gauge sheet piles to form a deep cross-sectional wall embedded in a residual slope or with a berm support is explored. This thesis compares the performance of a large section modulus sheet pile wall as an alternative to a concrete diaphragm wall, acting as an embedded cantilever wall on a slope (ECWS) by means of experimental centrifuge tests, numerical models and analytical methods. Abaqus (Hibbitt, Karlsson and Sorensen Inc, 1997) was used to conduct extensive numerical trials on the structural performance of the sheet pile wall model prior to the actual physical testing. The Abaqus results showed that the integrity of the interlock and reduced modulus action (RMA) due to slippage along the interlocked joint did not cause premature buckling of the thin wall even at the ultimate load. Further, a comparative study using centrifuge tests on 1:30 scaled models and Plaxis analysis demonstrated that under the worst condition with high water table, the rigid sheet pile wall of 1.32 m cross-sectional width carried a higher ultimate surcharge load with a much lower top of wall deflection, compared to a more flexible 0.6 m thick cracked concrete diaphragm wall. The analysis of the wall/soil/slope interactions for an ECWS involves many inter-dependent variables in addition to the complications of considering an adjacent slope or a berm support. It is difficult for existing analytical approaches to take all these factors into account, and some form of numerical analysis, calibrated through field data and results from centrifuge model tests is necessary. From the observations of the centrifuge tests and finite element analysis, major assumptions about the failure of a stiff ECWS in a rotational mode were deduced and adopted in the proposed limiting equilibrium method (Leq). The plane strain Leq ECWS Abstract ii analysis is based on the framework of minimum upper bound limiting equilibrium with planar failure planes and a Mohr-Coulomb soil model. As compared to the traditional limit equilibrium analysis, the Leq method is a fully coupled analysis using the shear strength reduction technique (SSR). New formulations are proposed for the development of horizontal active and passive pressure distributions based on the experimental and FE models. The proposed active pressure profile used is derived by combining the Coulomb and Krey method, and empirically back-figured to curve-fit the centrifuge tests by Morris (2005). The proposed passive pressure profile of a rigid rotational wall in failure is adjusted to allow for an adjacent slope or berm support through a presumed elasto-plastic deformation instead of a linear rigid translation of the passive wedge. ... A parametric study was later undertaken using the Leq method to develop a series of non-dimensionalised graphs to study and draw summarised conclusions on the behaviour of the ECWS. The final conclusions on the comparative study of the centrifuge tests, Plaxis and Leq analyses demonstrated that the alternative light gauge steel sheet pile performed very well as an ECWS. A key factor in the performance of the sheet pile wall was attributed to the large 1.32 m cross-sectional width of the interlocked sections. This provided high bending stiffness and high moment stability from shear stresses acting on the back and front faces of the wall.

This investigation utilized collaborative strategies to look at how a more social approach to teaching physics curriculum would affect students' interest, knowledge and self-efficacy towards the science of physics. Students went on field trips to meet physicists and worked together in the regular classroom on physics concept questions through Interactive Engagement teaching methods called the 'Collaborative Group Concept Conflict Process' and 'Physics by Inquiry'. The Force Concept Inventory was used as a formative and summative assessment tool and student percentiles ranked at the top of existing data that utilizes Normalized Gain as a formula for summative assessment. It was found that students gained curricular knowledge, interest and self-efficacy towards the field of physics.

Current design codes of Mechanically Stabilized Earth (MSE) Walls allow the use lower lateral earth pressure coefficient (K value) for designing geosynthetics walls than those used to design steel walls. The reason of this is because geosynthetics walls are less rigid permitting the wall to deform enough to work under active pressures instead of at rest pressures as in steel walls. A new concept of crimped steel bars was recently introduced. This new type of bar was tested for tension and pullout behavior. Results on tests made on crimped bars show that putting those crimps in the steel bar will give us a better pullout behavior and a more flexible tensile behavior. This new type of steel bar will behave more like geosynthetics, allowing the wall to deform sufficiently to reach the necessary deflection to reach the active condition. The use of steel by current design codes is pushing MSE walls to be designed with more steel than needed. Measurements of the force in different walls showed that the steel is not being used even close to the maximum stress allowed by the code which is 50%. The proposed design methodology using crimped bars will help us save around 52% of steel volume compared to the actual design procedures. This means a huge improvement in the usage of steel versus actual designs. This improvement is obtained because of the efficient behavior of rounded bars under corrosion and because of the flexibility in the bars obtained with the crimps that will allow us to reach the active condition.

"Edge. a. The line of intersection of two surfaces. b. A rim or brink. c. The point at which something is likely to begin. d. The area or part away from the middle; an extremity. e. A dividing line; a border." Edges are linear elements that create boundaries between two entities and linear breaks in continuity: shores, railroad cuts, walls. They act as lateral references rather that coordinate axes. "Those edges seem strongest which are not only visually prominent but also continuous in form and impenetrable to cross movement. An edge may be more than simply a dominant barrier if some visual or motion penetration is allowed through it then it becomes a seam rather than a barrier, a line of exchange along which two areas are sewn together." In our built environment an edge is defined and made permanent by the presence of a wall just as a line defines an edge on paper. Walls are the physical as well as the metaphorical representation of an edge. This thesis will examine the edge at the urban-suburban threshold of a city and private-public threshold of a neighborhood.
Master of Architecture

A higher level of complexity is possible by combining more than one idea as long as the order of the elements is readable in each built condition. Order is possible at any level of complexity. The more complex the greater the need of order. Order can be the relationship of a limited set of elements that inform and reform each other.
Master of Architecture

We are all influenced by memories when we pursue acts of creation. However, these reminiscences are often fleeting and elusive; they rarely are formalized, nor are they explicit in the final artifact. This work is based on a concrete representation of a childhood memory: the map of a city. The thesis explores ways to design and construct a place where others could, in turn, create their own memory. This place is located in Alexandria, VA, on South Fairfax Drive. It is an integrated mixed use program (Retails on the lower and ground levels, and residences on the 2 upper levels). This experimentation invites further questions. How strictly should the concrete representation of the memory guide the design? What are the qualities of the spaces resulting of such rules? How to engage in the tension between the explicit memory's realm and the contemporary world? How to express their respective materiality? |From| Memory of Walls |to| Walls of Memory
Master of Architecture

Previous studies on the typical Icelandic external wall have shown thatcondensation occurs at the interior surface of the concrete and field inspectionshave supported this conclusion. The primary objective ofthis study is to analyse the hygrothermal behaviour of the typical Icelandicwall and evaluate the mould risk at the interior surface of theconcrete.A comparative study is performed to compare the hygrothermalperformance and mould growth risk of two concrete outer wall structureswith interior and exterior insulation, by performing a parametricstudy using the simulation program WUFI® Pro.Additional parametric studies are performed in order to analyse theeffect of various material properties of the Icelandic building materialson the hygrothermal behaviour of the wall. This part also utilizedWUFI® Pro.To investigate the thermal bridge of the Icelandic wall, simulationswere conducted with the COMSOL Multiphysics software to evaluatethe linear thermal bridge and the risk of condensation at the joint.Lastly, an experiment was set up at the Innovation Center Iceland tomodel the interior insulated wall-slab section. The experimental setupwas completed during this time but the results will be analysedfurther after the thesis work.The results from this study indicate that the typical Icelandic wall ismore sensitive to rain than to interior moisture load and that no condensationoccurs within the wall structure. As concrete is inorganic,the risk of mould growth in the wall structure is limited, however,with increased driving rain load the mould risk increases. The resultsalso revealed that the moisture content of the interior insulated wallwas a great deal higher compared to the exterior insulated wall. Furthermore,the humidity level at the interior surface of the concrete inthe interior insulated wall exceeded the recommended critical humiditylevel based on general suggestions. Finally, results indicated thatusing a more dense concrete resulted in higher relative humidity at theinterior surface but a lower total water content of the wall.

Gypsum Plasterboard is « commonrliningimateriaL It is often used. with cold+ formed steel in wall, frame systems.'· It is used eitheD with lipped or- unlipped- (plain) C-· sections in the construction of both the load bearing and non-load bearing walls in residential, industrial and commercial buildings. This type of construction is common in Australia, the USA and Europe. In Australia plasterboard is commonly used in external walls with brick veneer as the outer skin of buildings. Plasterboard, however, is considered as a non-structural material and in the design of the studs in wall frames, the strengthening effects of the plasterboard in carrying axial (or other) loads is ignored. The Australian standard for cold-formed steel structures AS/NZS 4600 ( 1996) permits the use of lateral and rotational support to the steel studs in the plane of the wall provided by the lining material. However, it does not specify the magnitude of lateral or rotational support that can be used for the stud wall frames. Miller and Pekoz (1994a) have carried out experiments on studs subjected to axial compression loads and concluded that the experimental results contradict the shear diaphragm model assumed by American specification (AISI, ... , ,..,. .. 1986). A suitable design method to accurately predict the structural behaviour of studs under axial compression, bending and combined ·.axial compression and bending is required. As a first step in the development of the design methods, the axial compression loads must be studied. The objective of this research is therefore to determine a design model for the gypsum plasterboard lined cold-formed steel stud walls that can accurately represent their behaviour and to accurately predict the ultimate strength of the stud walls under axial compression. For this purpose, an extensive research project was undertaken using the following: 20 full scale tests on typical cold-formed steel stud wall frames (unlined, one side and both sides lined), 24 short stud column tests to study the effects of plasterboard lining on local buckling of flanges, fmite element analysis (FEA) of full scale cold- Y.K Telue: Behaviour and design of plasterboard lined cold-formed steel studwall·systems formed steel stud wall frames including validation with full scale test results and a detailed parametric study using FEA. It has been shown in this research that lining the plasterboard on one or both sides can increase the ultimate load of the' stud considerably. The Australian -and AISI specifications were found to be inadequate in predicting the ultimate loads and failure modes of the studs. This research has shown that by using appropriate effective length factors, the ultimate load and the failure modes of both the unlined and the. lined studs can be accurately .predicted using the provisions of AS/NZS 4600 (1996). In the case of lined studs, it has been shown that the effective length factors in the plane of the wall and· .for torsion can be related to the ratio of the fastener spacing to the total unbraced height' of the studs. The thesis also presents design rules that can accurately predict the ultimate load and the failure mode of slender web studs lined on one or both sides.

This is a story of a quest that begins on a wall of history at a cemetery where Steve Biko was buried. The main character is the writer, who is partly the author, partly a fictionalised everyman. He is on a journey of self-discovery, while at the same time questioning contemporary South Africa.

The photographer discusses work in “Hearing Through Walls”, a Masters of Fine Arts thesis exhibit held at downtown Tipton Gallery from February 19th through March 2nd, 2018. The exhibition consists of 15 archival inkjet prints and one two-channel video piece, representing the artists three-year exploration into narrative forms in image making. Using non-traditional approaches to photographic portraiture and experimental exhibition layout, the artist forms questions around themes of domesticity, lost youth, and American masculinity. Among these themes is an investigation into photographic issues, including the cultural role that photographs play in perpetuating, miming, and disrupting the facades of everyday life. Non-photographic influences are listed, including the paintings of Edward Hopper and the filmmaking of Paul Thomas Anderson. Historic and contemporary photographic influences included are Garry Winogrand, William Eggleston, Philip-Lorca Dicorcia, and Katy Grannan.

Bâtir de villes face à la surpopulation tout en prenant en compte les changements climatiques, demandera de faire appel à des solutions concrètes pour répondre aux besoins sanitaires, sécuritaires et biophiliques de leurs habitants. Le but de cette thèse est d'évaluer la possibilité d'avoir un système de mur vivant qui soit durable, écologiquement juste, non limité par la localisation et la typologie du bâtiment et plus abordable que les systèmes actuellement disponibles. L'hypothèse de cette thèse est le béton, en raison de sa durabilité, son coût et son ubiquité, a le potential pour être utilisé comme un moyen de croissance pour la vie végétale et qu'il s'agit actuellement du matériau le plus réaliste pour étendre la portée de la nature dans le milieu urbain.La thèse est pluridisciplinaire et il faudra combiner les connaissances des sciences de la botanique et des matériaux, connaissances qui seront appréhendées au travers d'un prisme architectural. Ce point de vue influencera la trajectoire de la conception future du système, par exemple pour déterminer si le système pourrait être structurel et utilisé pour l'intérieur et l'extérieur des bâtiments bas, moyens et hauts, ou encore quelles ambiance architecturales et urbaines il est susceptible de créer. Cette thèse de doctorat déterminera la faisabilité des systèmes de murs vivants en béton et, si elle est validée, fournira la base pour des solutions durables de murs vivants en béton
Cities facing overpopulation amid shifting climates will require practicable solutions to meet the biophilic, health, and safety needs of city dwellers. The goal of this thesis is to determine the possibility of having a living wall system which is durable, environmentally sustainable, unlimited by location and building typology, and more affordable than currently available systems. The hypothesis of this thesis is that concrete,due to its durability, cost, and ubiquity, is capable of being used as a growing medium for plant life and is currently the most realistic material choice to significantly extend nature’s reach into the urban milieu. The thesis is multi-disciplinary and combines botany and material science, but architecture is the lens throughwhich the inter-disciplinary work is validated. This architectural lens will influence the trajectory of future system design, e.g., in determining if the system would have the potential of being structural and used for the interiors and exteriors of low, mid, and high-rise buildings. This doctoral thesis would determine the feasibility of concrete living wall systems and if validated provide the foundation for sustainable concrete living wall solutions

The goal of this work was to apply an operable green façade wall system in order to analyze the benefits of vegetative surfaces in relation to hot arid urban climates. A second layer of information was also analyzed to provide an alternative to electricity. This method was used to actuate the operable green façade passively to enhance sustainable environmental strategies. Carbon emissions, temperature and relative humidity were evaluated in a hot arid climate on a kinetic green wall system physical scale model. Computer simulation provided insight to daylight, shading and solar irradiance within a mock up building. The results of these factors may be a useful tool to implement in building design for these climatic zones.

Greater attention is being directed towards incorporating greenery into the built environment as increasing global urbanisation drives the search for sustainable urbanism. This research takes a parametric approach to studying living wall dynamics using three methods to cover a diversity of design parameters and performance criteria. The findings led to a functional typology for living walls based on a range of design, context and performance parameters wider than previously identified. Such parametric studies offer valuable insights into 'transfunctional' living walls for homes, schools and public spaces.

My purpose has been to discover and present all that is known of Moses Wall (1606?-1664+). In approximately 62,000 words this study addresses the three main aspects of his work. 1 HOUSE OF LORDS DEPOSITIONS. These documents were officially destroyed but secretly copied. I found and examined them in the House of Lords archive. I present detailed considerations of the material and the implications of Moses Wall's close involvement with Sir Harry Vane, as messenger and as spy for the Independents. 2 TRANSLATION OF SPES ISRAELIS. As a scholar and millennial idealist Moses Wall was the anonymous translator for the first English edition of Spes Israelis by the Dutch Rabbi Menasseh ben Israel. Responding to MP Edward Spencer's reply, the second edition contained a cogent and well-argued Discourse by Wall, establishing a rational and religious case for readmitting the Jews as citizens of England. I establish the context and consequences of this work. 3 CORRESPONDENCE with SAMUEL HARTLIB and JOHN MILTON. Fourteen letters written by Moses Wall between 1652 and 1660 are available from the Hartlib archive. They offer political, personal and practical information, with rare insights into daily survival under the Commonwealth. In my work these letters are edited and examined as a body for the first time. Together with supporting detail from other sources I show how these offer a living record of the man Moses Wall and his achievement. I offer the possibility that these letters conveyed more than their immediate meaning. One single letter from Moses Wall to John Milton survives, well known and discussed by Milton scholars. In the context of other material here presented, this is perceived as a source of inspiration and influence from 1659 to1980.

Wall-Couture is a project within the textile design field, which aims to explore methods for surface design in digitally printed wallpaper. Through a practice based working method, textile after-treatment techniques have been used to manipulate digitally printed wallpaper with hand-painted motives. Practices borrowed from haute couture have influenced the working method. The result is a range of design examples displaying various expressions of the techniques. The project shows that several surface materials could be applied in ways that enhance tactility and visual depth to digitally printed wallpaper, and also that methods from craftsmanship could be use to design contemporary wallpaper. The combination of techniques increases the designer’s opportunities to design wallpaper by using alternative approaches to material and surfaces. The work also strives to higher the value of handicraft, decoration and ornamentation in the design field. Another value is to strengthen the position of digital printing in the textile industry; the work encourages technical progress for creating digital print in combination with surface treatments.

För vissa är graffiti konst, för andra är det ett tecken på förlorad kontroll. För mig är det ett redskap för att mötas.  Jag har delat in mitt examensarbete i två delar. Den första behandlar visionen jag baserat mitt arbete på. Den andra handlar om design och placering av de fysiska paviljongerna.  I den första delen har jag utgått ifrån ett scenario där den fysiska arkitekturen återspeglas i ett virtuellt gallerisystem jag get namnet Gallery Wall. Denna del finns bara på idébasis men har varit utgångspunkt då jag formgivit mina paviljonger.  Jag har skapat fem olika paviljongstyper som tillsammans på ett teoretiskt plan utgör en och samma virtuella huvudform. I, eller rättare sagt på, paviljongerna ges tillfälle för vem som helst att måla och presenteras sin gatukonst.  Min förhoppning är att mina paviljongtyper skall inspirera andra att bygga egna varianter som alla är del av Gallery Wall. Systemet är tänkt att vara open source.  Jag vill också med mitt arbete ifrågasätta och belysa vad som får visas upp och värdesätts inom konstvärlden och i samhället.  Mitt examensarbete är baserat på en dröm som förhoppningsvis i framtiden blir verklighet.

Incorporating Egyptian imagery in a Roman medium, Isiac Ritual Worship is a remarkable example of first-century CE Roman wall painting. Discovered in Herculaneum, it illustrates a ritual to the Egyptian goddess Isis. Discussions of Isiac Ritual Worship in modern scholarship position the wall painting as evidence of Isiac ritual practice in Roman Italy without conducting a close visual analysis and examining its combined use of Roman and Egyptian imagery. Therefore, in this thesis, I ask two pressing questions: How does Roman and Egyptian imagery coalesce in Isiac Ritual Worship? And why are the Roman and Egyptian motifs combined in certain ways in the wall painting? To answer these questions, I conduct a visual analysis of Isiac Ritual Worship, drawing upon ancient literary sources, Isiac and Egyptian imagery, and contemporaneous wall paintings.
2020-09-06

Wind loads acting on wooden building structures need to be dealt with adequately in order to ensure that neither the serviceability limit state nor the ultimate limit state is exceeded. For the structural designer of tall buildings, avoiding the possibly serious consequences of heavy wind loading while taking account at the same time of the effects of gravitation can be a real challenge. Wind loads are usually no major problem for low buildings, such as one- to two-storey timber structures involving ordinary walls made by nailing or screwing sheets of various types to the frame, but when taller structures are designed and built, serious problems may arise.

Since wind speed and thus wind pressure increases with height above the ground and the shear forces transmitted by the walls increase accordingly, storey by storey, considerable efforts can be needed to handle the strong horizontal shear forces that are exerted on the bottom floor in particular. The strong uplift forces that can develop on the wind side of a structure are yet another matter that can be critical. Accordingly, a structure needs to be anchored to the substrate or to the ground by connections that are properly designed. Since the calculated uplift forces depend very much upon the models employed, the choice of models and simplifications in the analysis that are undertaken also need to be considered carefully.

The present licentiate thesis addresses questions of how wind loads acting on multi-storey timber buildings can be best dealt with and calculated for in the structural design of such buildings. The conventional use of sheathing either nailed or screwed to a timber framework is considered, together with other methods of stabilizing timber structures. Alternative ways of using solid timber elements for stabilization are also of special interest.

The finite element method was employed in simulating the structural behaviour of stabilizing units. A study was carried out of walls in which sheathing was nailed onto a timber frame. Different structural levels were involved, extending from modelling the performance of a single fastener and of the connection of the sheathing to frame, to the use of models of this sort for studying the overall structural behaviour of wall elements that possess a stabilizing function. The results of models used for simulating different load cases for walls agreed reasonably well with experimental test results. The structural properties of the fasteners binding the sheathing to the frame, as well as of the connections between the members of the frame were shown to have a strong effect on the simulated behaviour of shear wall units.

Regarding solid wall panels, it was concluded that walls with a high level of both stiffness and strength can be produced by use of such panels, and also that the connections between the solid wall panels can be designed in such a way that the shear forces involved are effectively transmitted from one panel to the next.

Thesis (M.A.)--University of North Carolina at Chapel Hill, 2007.
Title from electronic title page (viewed Mar. 27, 2008). "... in partial fulfillment of the requirements for the degree of Master of Arts in the School of Journalism and Mass Communication." Discipline: Journalism and Mass Communication; Department/School: Journalism and Mass Communication, School of.