Recent interest in three-dimensional (3-D) stereoscopic displays has prompted the need to assess the efficacy of retinal disparity depth cues. Accordingly, this study analyzed performance on two 3-D tasks under three levels of signal-to-clutter ratio as participants viewed three display formats portrayed with or without retinal disparity depth cues. Display formats included a plan view and two types of perspective formats. The two tasks assessed viewer ability to compare inter-object distances and extrapolate object positions given a known vector within a 3-D volume. Results indicate that retinal disparity depth cues reduce the number and magnitude of errors within a course prediction task, but did not affect search times or ratings of viewer confidence. Display format affected search times as follows. In a relative distance task, search times for the perspective format are lower than for either the plan view or enhanced perspective formats. In a course prediction task, search times for the plan view and perspective formats are lower than for the enhanced perspective format. Display format does not affect error rate, error magnitude, or ratings of viewer confidence. No interaction between depth cues and display format was observed. The inclusion of retinal disparity depth cues in a visual display system are suggested when the viewer task involves predictions of object position in a 3-D volume and when reducing the number and magnitude of errors is important. Perspective display formats are suggested when fast search times are important. / Master of Science

Inspired by writings on creativity and by Howard Gardner's theory of multiple intelligences, I conducted a series of ten "exercises" -- each of them a guided visualization followed by an opportunity to produce -- with nine- and ten-year-old students. The visualizations, which were designed to encourage the students to explore some of the many ways our minds have of knowing and learning, began with a simple relaxation exercise and proceeded to more challenging exercises involving, for instance, kinesthetic learning, sensory awareness, the logical and linguistic mind versus the spatial mind, and intra- and interpersonal intelligence. Following each visualization the students discussed what they had experienced (transcripts of the visualizations and the discussions are included in the thesis). The students responded in visual terms as well: after each visualization, each student created a two- or three-dimensional piece of art from materials such as matboard, construction and origami paper, glue, felt-tip pens, pipe cleaners, and plastic-coated wire. These visual responses have been photographed, described, and scored according to the number of materials used, the number of colors used, and the dimensionality of the piece (photos, descriptions, and scores are included in the "Gallery". I found, surprisingly, that the visualizations in which the students were the most imaginatively engaged did not always produce the most interesting art, and that girls were much less likely than boys to create three-dimensional pieces, although girls tended to use more colors and occasionally used relief on otherwise two-dimensional pieces. / Master of Architecture

Considerable research has centered around the issue of whether stereoscopic (3D) viewing allows improved viewer performance for tasks that involve three-dimensional information. Taken as a whole, such previous research indicates that the potential stereoscopic advantage may be dependent on the nature of the task being examined. This task dependency makes it difficult to predict whether stereoscopic viewing will improve viewer performance for a given untested task. By measuring performance over a variety of component tasks, this research examined the potential task-dependent nature of the stereoscopic advantage. In addition, a method was proposed to employ such component-task data for predicting the stereoscopic advantage within future unknown tasks. A set of 12 component tasks (in six task groups, each with two representative tasks) was developed to represent the various task demands of processing 3D visual information. Participants performed each of the 12 component tasks in both a monoscopic (2D) and a stereoscopic (3D) viewing condition. Performance was measured in terms of viewing time, percent accuracy, and a generic mental effort rating. Results indicate that when certain display guidelines are not violated, stereoscopic display improves or at least maintains the overall level of viewer performance for most tasks. Furthermore, the results clearly indicate that the stereoscopic advantage is dependent on the nature of the task. Although further refinement to the set of component tasks is necessary before the precise nature of the task dependency can be determined, the component task method displays considerable promise for being able to predict the stereoscopic advantage for any number of complex 3D tasks. / Ph. D.

My work presents a novel approach to fabricate binder free three-dimensional carbon nanotubes/sulfur (3DCNTs/S) hybrid composite by a facile and scalable method increasing the loading amount from 1.86 to 8.33 mg/cm2 highest reported to date with excellent electrochemical performance exhibiting maximum specific energy of ~1233Wh/kg and specific power of ~476W/kg, with respect to the mass of the cathode. Such an excellent performance is attributed to the fact that 3DCNTs offers higher loading amount of sulfur, and confine polysulfide within the structure. In second part of the thesis, molybdenum disulfide (MoS2) is typically studied for three electrochemical energy storage devices including supercapacitors, Li-ion batteries, and hybrid Li-ion capacitors. The intrinsic sheet like morphology of MoS2 provides high surface area for double layer charge storage and a layered structure for efficient intercalation of H+/ Li+ ions. My work demonstrates the electrochemical analysis of MoS2 grown on different substrates including copper (conducting), and carbon nanotubes. MoS2 film on copper was investigated as a supercapacitor electrode in three electrode system exhibiting excellent volumetric capacitance of ~330F/cm3 along with high volumetric power and energy density in the range of 40-80 W/cm3 and 1.6-2.4 mWh/cm3, respectively. Furthermore, we have developed novel binder-free 3DCNTs/ MoS2 as an anode materials in half cell Li-ion batteries. The vertically oriented morphology of MoS2 offers high surface area and active electrochemical sites for efficient intercalation of Li+ ions and demonstrating excellent electrochemical performance with high specific capacity and cycling stability. This 3DCNTs/ MoS2 anode was coupled with high surface area southern yellow pine derived activated carbon (SYAC) cathode to obtain hybrid 3DCNTs/ MoS2 || SYAC Li-ion capacitor (LIC), which delivers large operating voltage window of 1-4.0V with excellent cycling stability exhibiting capacitance retention of ~80% after 5000 cycles.

A two-dimensional structural analysis design approach has been the universally accepted method for a small structural engineering design firm. The tools to perform the analysis have been paper and pencil, calculators and more recently personal computers with two-dimensional software. With the introduction of three-dimensional software, a major shift is occurring on how small structural engineering firms approach analysis and design. This thesis research reviews the analysis of an existing building utilizing the standard two-dimensional approach, including horizontal diaphragm-action within wood floors. This study also reviews the research performed on horizontal diaphragms and investigates the use of three-dimensional, finite element modeling (RISA-3D) for the analysis of horizontal diaphragms. It is shown that the three-dimensional model can provide results similar to the two-dimensional hand calculations. However, the thickness of the diaphragm elements has to be significantly modified for flexible diaphragm action. The experience described herein is useful for structural engineer interfacing within three-dimensional CAD systems. The thesis concludes with a discussion on the challenges facing small structural engineering firms, including computer based technologies, engineering expertise to develop contract documents and review shop drawings, and outsourcing of design services.

Thesis (M.S. in Computer Science)--Naval Postgraduate School, September 2003. / Thesis advisor(s): Don Brutzman, Curtis Blais. Includes bibliographical references (p. 103-104). Also available online.

Orientadores: Inacio Maria Dal Fabbro, Adilson Machado Enes / Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Agrícola / Made available in DSpace on 2018-08-24T11:36:45Z (GMT). No. of bitstreams: 1 Fracarolli_JulianaAparecida_D.pdf: 5319280 bytes, checksum: 4488936faca98d4c091c7703b2fd0ca0 (MD5) Previous issue date: 2014 / Resumo: Técnicas ópticas vêm sendo utilizadas para diversas finalidades técnicas e científicas. Algumas técnicas ópticas se caracterizam como métodos robustos, de baixo custo, não invasivos e não destrutivos para avaliação de materiais diversos, como produtos agrícolas, havendo aplicações desde a engenharia até a área da saúde humana e animal. Neste trabalho propõem-se a avaliação de frutos através da combinação de duas técnicas ópticas cujos estudos vêm comprovando suas aplicabilidades como métodos alternativos e inovadores, os quais empregam equipamentos de baixo custo na aquisição dos dados, permitindo automação de processos de seleção e classificação de produtos. Uma dessas técnicas é conhecida como Biospeckle, a qual fornece informações referentes à qualidade do material biológico em nível de estruturas celulares e a outra é o escaneamento com linha laser, que permite a obtenção de geometria do objeto nos eixos Xi (i = 1,2,3). O objetivo é proceder a um levantamento topográfico digital de materiais biológicos combinando o posicionamento geométrico dos pontos da imagem com informações referentes à atividade biológica. Foi realizada ainda a diferenciação entre frutos de formato variado, a classificação de frutos por formato, classe, coloração e defeitos por meio de processamento de imagens. Dessa forma é possível observar frutos com irregularidades superficiais, maturidade, danos mecânicos e latentes, entre outros. Esta pode se tornar a base para a seleção automática de produtos agrícolas. Foram utilizados um emissor de linha laser de diodo com 632 nm de comprimento de onda, luz branca difusa, câmera CCD, computador, mesa óptica, mamões, peras, tomates e esferas de isopor, bem como softwares ImageJ, Octave, Matlab. Foram desenvolvidos cinco programas computacionais para processamento das imagens. Foram realizados cinco experimentos, a saber: (1) Avaliação da Maturidade de Frutos; (2) Reconstrução Tridimensional e Mapeamento da Bioatividade; (3) Detecção de Formato Variado; (4) Mapeamento por Formato, Classe e Coloração; (5) Detecção de Defeitos. Na Avaliação da Maturidade foram correlacionados índices de maturidade tradicionais (parâmetros de Hunter L a b, pH, Sólidos Solúveis Totais (SST), a relação Sólidos Solúveis Totais e Acidez Total Titulável (SST/ATT), Módulo de Elasticidade, massa e diâmetro) e a técnica óptica Biospeckle, pelo cálculo do Momento de Inércia (MI). Para a Reconstrução Tridimensional os frutos foram rotacionados através de um motor de passo. A cada passo do motor, o fruto foi iluminado pela linha laser projetada e fotografado para obtenção dos dados de geometria e Biospeckle pelo método LASCA (Laser Speckle Contrast Analysis). Foi analisada a correlação entre os índices de maturidade tradicionais e os valores de MI na avaliação da maturidade. Esta tese mostra que é possível avaliar a maturidade dos frutos através do Biospeckle. Obteve-se um mapa tridimensional que integra as informações de topografia e bioatividade do fruto. Obteve-se, ainda, a detecção de formato variado, a classificação de frutos por mapeamento por formato, classe e coloração e detecção de defeitos através de software / Abstract: Optical techniques have been used for both technical and scientific purposes. Optical techniques are usually characterized as being robust, inexpensive, non-invasive and non-destructive methods in to evaluate a diversity of materials which include agricultural derived products. It also shows applications ranging from engineering to human and animal health. In this doctoral dissertation, a new technique to evaluate some fruit properties is proposed. It combines two optical techniques (i.e. Biospeckle and Scan-line laser) whose applicability has been demonstrated as being alternative and innovative. The new proposed technique allows low-cost data acquisition, automation of the entire process, and a proper selection and classification method of vegetable bodies (e.g. fruits). Biospeckle allows obtaining information regarding the quality level of biological material into cellular structures. Scan-line laser enables the attainment of the object geometry on the axes Xi (i=1,2,3). The main purpose of this doctoral dissertation is to obtain a digital survey of biological materials (i.e. papaya, pear and tomato) integrating both geometric positioning and information concerning to its biological activity. The differentiation between different fruit shapes, fruit sorting by size, class, color and defects through image processing was also carried out. Thus it was also possible to observe fruits with surface irregularities, maturity, and mechanical damage, among others. This is the basis proposed for the automatic selection of agricultural products. The following materials were employed in the tests: a line-emitting diode laser with a wavelength of 632 nm, diffuse white light, CCD camera, computer, optical table, papaya, pear and tomato fruits and polystyrene spheres. The softwares utilized were: ImageJ, Octave, Matlab. A total of five computer programs were developed for the image processing procedures. Five experiments were performed: (1) Maturity Assessment of Fruits; (2) Three Dimensional Reconstruction and Mapping of Bioactivity; (3) Miscellaneous Format Detection; (4) Mapping Format, Class and Coloration; (5) Defect Detection. In Maturity Assessment there were correlated traditional methods to verify the maturity (the Hunter parameters L a b, pH, Total Soluble Solids (TSS), the relationship between Total Soluble Solids and Titratable Acidity (TSS/TA), Modulus of Elasticity, weight and diameter) and the optical technique Biospeckle by calculating the Moment of Inertia (MI). For the Three Dimensional Reconstruction the fruits were rotated by a stepper motor. At every step of the motor, the fruit was illuminated by the projected laser line and photographed in order to obtain both geometric and biospeckle data by the LASCA (Laser Speckle Contrast Analysis) method. The correlation between traditional methods for the maturity assessment and values of MI was analyzed. This doctoral dissertation shows that it is possible to evaluate the maturity of fruits through Biospeckle. A three-dimensional map that includes topographical information and bioactivity of the fruit was generated. Also a software can now detect variations in size, classify fruit shapes, color and class as well as defect detection efficiently. / Doutorado / Maquinas Agricolas / Doutora em Engenharia Agrícola

Uppsatsen behandlar skillnader i lagstiftning om tredimensionell fastighetsbildning i Sverige och Finland. Först sker en generell beskrivning av olika sorters tredimensionell fastighetsindelning för att sedan gå över till bildandeprocessen i Sverige samt i Finland. Uppsatsen har utförts som fallstudie där en litteraturstudie gjorts genom att studera lagstiftning och propositioner i länderna. Tredimensionell fastighetsindelning infördes i Sverige 2004. Då infördes även specifik lagstiftning kring bildandeprocessen av tredimensionella fastigheter. Denna lagstiftning går att finna i 3 kap. fastighetsbildningslag (1970:998). Alla typer av fastigheter ska, enligt 3 kap 1 § bildas så att de är varaktigt lämpade för sitt ändamål, har en lämplig utformning, tillgång till vägar samt att det finns godtagbara anordningar för vatten och avlopp om fastigheten är avsedd för bebyggelse. Fastighetsbildning får endast ske om fastigheten kan anses ha varaktig användning för ändamålet inom överskådlig tid och om ändamålet inte kan tillgodoses på något annat sätt än fastighetsbildning. Specifikt för tredimensionella fastigheter gäller även att den åtgärden ska anses lämpligare än andra åtgärder för att tillgodose ändamålet. Krav på tredimensionell fastighetsbildning beskrivs vidare i 3 kap. 1 a § FBL. I Sverige finns också möjlighet att bilda tredimensionella fastigheter avsedda för bostadsändamål, så kallade ägarlägenheter. Dessa kan endast bildas i ny bebyggelse eller fastigheter som inte varit bostäder de senaste åtta åren samt endast bildas i enheter om minst tre lägenheter. Finland införde tredimensionell fastighetsbildning 2018. I Finland finns krav på att tredimensionell fastighetsbildning endast får ske inom detaljplanelagt område samt med en bindande tomtindelning. Tredimensionell fastighetsbildning sker i Finland främst genom avstyckning. I båda länderna krävs en fastighetsförrättning för att få bilda fastigheter av alla slag. Ägarlägenhetsfastigheter har inte införts som ett alternativ i Finland. Den största skillnaden mellan lagstiftningen om tredimensionella fastigheter i Sverige och Finland är möjligheten att bilda tredimensionella fastigheter inom detaljplaneområde. Finland har inte heller någon lagstiftning gällande ägarlägenheter. / The thesis discusses differences in legislation about three-dimensional property in Sweden and Finland. The structure of the thesis follows a more general description of different types of three-dimensional property rights to in the next chapter be narrowed down to three-dimensional property formation in Sweden and Finland. The thesis has been written by studying Swedish and Finnish legislation and propositions and by studying literature on the subject. Sweden introduced independent three-dimensional property in 2004 and with it came new legislation that can be found in the third chapter of the Real Property Formation Act (1970:998). According to the legislation, all property, two- and three-dimensional, should be formed so that their purpose is long-lasting, has an appropriate shape, access to road and has proper sewage and water systems if the property is to be settlements. Property formation can only happen if the purpose of the formation cannot be fulfilled any other way. For three-dimensional property there is, as mentioned, specific regulations. For a three-dimensional property to be formed the measure needs to be the most appropriate to fulfil the purpose. Other legislation is further described in the third chapter 1 a § FBL. Sweden also has special legislation regarding condominiums, they can only be formed in pairs of three and only in buildings that has not been used for living purposes the last eight years. Finland introduced independent three-dimensional property in 2018 which also brought new legislation. In Finland is it only possible to form independent three-dimensional property within a detailed development plan and with a binding site layout plan. The formation of three-dimensional property is often done with subdivision. Finland has not passed legislation regarding condominiums. In both countries one must carry out a property formation procedure that looks very much alike in both countries. The biggest difference between the legislation regarding forming three-dimensional property of Finland and Sweden is the possibility to form three-dimensional property within an area with a detailed development plan. Another big difference is that Sweden has condominiums and Finland do not. Despite some differences in the legislation both countries end up with the same results, forming independent three-dimensional property.

D. Tech. (Department of Electronic Engineering, Faculty of Engineering and Technology) --Vaal University of Technology / Opening up local markets for worldwide competition has led to the fundamental change in the development of new products. In order for the manufacturers to stay globally competitive, they should be able to attain and sustain themselves as ‘World Class Manufacturers’. These ‘World Class Manufacturers’ should be able to:  Deliver products in fulfilling the total satisfaction of customers.  Provide high quality products.  Offer short delivery time.  Charge reasonable cost.  Comply with all environmental concern and safety requirements. When a design is created for a new product there is great uncertainty as to whether the new design will actually do what it is desired for. New designs often have unexpected problems, hence prototypes are part of the designing process. The prototype enables the engineers and designers to explore design alternatives, test theories and confirm performance prior to standing production of new products. Additive Manufacturing (AM) technologies enable the manufacturers to produce prototypes and products which meet the requirements mentioned above. However the disadvantage of AM technologies, is that the printing material which is required is limited to that of the supplier. When uncommon printing materials must be used to manufacture a prototype or product, the 3D printing process stood out above the rest owing to its printing method. However the printing heads used in current commercially available 3D printers are limited to specific fluid properties, which limits new and unique powder binder combinations. Owing to the problem mentioned, the need arose to develop a more ‘rugged’ printing head (RPH) which will be able to print with different fluid properties. The RPH could then be used to print using unique and new powderbinder combinations. The RPH was designed and constructed using the solenoid inkjet technology as reference. In order to determine the effect which the fluid properties have on the droplet formation, fourteen different glycerol-water test solutions were prepared. The fluid properties were different for each of the glycerol-water solutions. The fluid properties included the viscosity, density and surface tension of the solution. The control parameters of the RPH were theoretically calculated for each of the glycerol-water solutions and nozzle orifice diameter sizes. The control parameters of the RPH included the critical pressure and time. Using an experimental setup, droplets ejected from the RPH could be photographed in order to be analysed. It was determined that the theoretically calculated critical times could not be used in the RPH, as the pulse widths were much lower than the recommended minimum valve pulse width of the solenoid valve used. The control parameters were then determined practically for each of the different glycerol-water solutions as well as for each nozzle orifice diameter size. The practically determined control parameters were also compared to that of the theoretically determined parameters. A mathematical model was formulated for each of the practically determined critical pressure and time parameters. Non-glycerol-water solutions were also prepared in order to determine whether the control parameters could be calculated using the practically determined mathematical models. It was found that the practically determined mathematical models, used to calculate the control parameters, could not be used with non-glycerol-water solutions. Using the practically determined mathematical models, the drop formation process of the non-glycerol-water solutions was not optimized and satellite droplets occurred. Although the practically determined models did not work for non-glycerol-water solutions, the methods used to determine the control parameters for the glycerol-water solutions could still be used to determine the practical critical pressure and time for Newtonian solutions.

Visualisation, the representation of data in visual form, is at the core of our ability to communicate information. Without clear representation, data would remain in its raw form thus greatly hindering the communication process. This is especially the case when the data source is large, complex and subject to change. One such area is related to the use of computer based simulation tools for thermal analysis. This research investigates the potential of visualisation to improve the ways in which thermal analysis data are presented to building services engineers, with a view to increasing the accuracy and efficiency of its interpretation. The approach taken throughout followed a pattern of research, development, demonstration and evaluation. The research phase included a detailed review of existing visualisation theory and an extensive user requirement survey. The development phase produced three working visualisation software prototypes, each of which was demonstrated or evaluated within the sponsoring company. Whilst the initial emphasis of the research was advanced Three-Dimensional (3D) visualisation, extensive user requirement analysis indicated that comparing multiple datasets in an intuitive manner was more important. In response, the research focused on combining techniques in ways which supported the rapid comparison of multiple files and the data contained within. The final prototype combines techniques for data storage and manipulation with information visualisation techniques and advanced 3D graphics. These elements are tightly integrated within a single application that facilitates the management and interpretation of data from multiple analysis models. Evaluation of the prototype showed high levels of user satisfaction and improvements in the accuracy and efficiency of data interpretation. The techniques demonstrated by the prototype were also understood and liked by the users of thermal analysis tools. Several of the techniques, such as the new Force Directed Difference Diagrams, have potential applications outside of building services engineering. The research has demonstrated it is possible to improve the representation and interpretation of building performance data using visualisation techniques.