434 research outputs found
Flexible superconducting ceramic polymer composites and method of making same, U.S. Patent 5,108,981
No full textSuperconducting ceramic material is woven into an interconnected structure and embedded in a polymer to produce a flexible, superconducting ceramic material. The polymer also provides protection from moisture. The ceramic polymer composite is fabricated by soaking a carbon fabric in a solution of metal nitrates, ethylene glycol and citric acid to yield a nominal composition of, for example, YBa2Cu3O7-x. Heat treatment results in the decomposition of the nitrates, organics and carbon fabric to produce an interconnected structure of the superconducting ceramic material which takes the shape of the original carbon fabric on a reduced scale. In addition, the processing conditions yield significant grain orientation. The superconducting grains of the ceramic material align along the direction of the original fabric weave which provides an improvement of the critical current densities
Perforated PZT polymer composites, U.S. Patent 4,422,003
No full textComposites of lead zirconate titanate (PZT) and inactive polymers with 3-1 and 3-2 patterns and a method of fabrication thereof are described. Fabrication is accomplished by drilling holes in sintered PZT blocks and filling the holes with epoxy or some other inactive polymer. The influence of hole size and volume fraction PZT on the hydrostatic properties of the composite is evaluated. By decoupling the piezoelectric coefficients d33 and d21 in the composite, the hydrostatic coefficients are greatly enhanced
Windows Vista inside out / Ed Bott, Carl Siechert, Craig Stinson.
No full textIncludes index.Electronic reproduction. Boston, Mass. : Safari Books Online 2006. Mode of access: World Wide Web. Available to subscribing institutions. s2006 maun s.xxviii,1101 pages
Methods for producing novel ceramic composites, U.S. Patent 6,004,500
No full textA process for making ceramic composites includes the steps of: a) forming a polymer composition into a three-dimensional mold; b) filling said three-dimensional mold with one or more ceramic containing compositions; c) heating said filled mold to dry and sinter the ceramic; d) removing at least a portion of said three-dimensional mold thereby forming voids; and e) filling the voids with a second composition which has a piezoelectric coefficient which is substantially different from the piezoelectric coefficient of said ceramic structure. Steps a through e yield a controlled, non-random piezoelectric ceramic composite having 2-3, 3-2 or 3--3 connectivity with respect to the sintered ceramic and the second composition throughout the composite
Noise Measurements of a Low-Noise Amplifier in the FDM Readout System for SAFARI
No full textThe SPICA-SAFARI instrument requires extremely sensitive transition edge sensor (TES) arrays with a noise equivalent power of 2×10-19W/Hz and a readout system with an output noise that is dominated by the detector noise. It is essential to ensure the frequency domain multiplexing (FDM) readout system in SAFARI meets the noise requirement. The FDM system in SAFARI consists essentially of LC filters, a superconducting quantum interference device, a room-temperature low-noise amplifier (LNA), and a demultiplexer. Here we present a noise study of the LNA from a laboratory amplifier chain. We found the equivalent current and voltage noise of the LNA to be 5.4pA/Hz and 315pV/Hz, respectively, which are low enough to read out SAFARI’s TES arrays.QN/Gao La
Sustainable Water management scheme for the Negin Safari Park
No full textThough the perils of climate change on our environment are common knowledge its mitigation through informed planning is widely absent. This research project aims to aid the architect in developing a design which has a comparatively lower ecological footprint and focuses on opportunistic utilization of renewable resources readily available in the context. Within the preview of this thesis the potential of developing a sustainable water management scheme for the Negin safari park located in the Fars province of Iran is studied.Iran is facing a situation of drought for the past few years which has had an adverse impact on the region. One of the communities to have been affected by this are the Qashqai nomads of Iran, who have been threatened with deprivation of their freedom due to the economic woes brought by drought. The Negin safari park being developed in the region aims to uplift this community and provide a platform for them to be able to share their work and culture. However, the influx of tourists due to the development of a Safari park further increases the stress on the depleting water resources in the region. In turn development of water technologies facilitating the reclamation of waste water, conservation of water and mitigation of extreme withdrawal of resources needs to be studied and implemented. In order to create a design which consciously uses the water resources and facilitates re-use of waste water, different water technologies have been identified and studied to understand its feasibility for installation in Iran. Once the ideal technologies were identified, a water management scheme was developed which facilitated water autarky in the park. Further on the relation of the built form with the technology was explored. The technologies which were shortlisted entailed requirements which had a direct impact on the design of the built form and its spatial organization. The final product of this thesis entails a customized set of design guidelines for the development of a Safari park in Iran. These guidelines have stemmed from the optimization strategy used in designing the Negin safari park with the intended water technologies. Adhering to the concept of developing the park as an eco-tourist destination attention has been placed to propose sustainable technologies with lower energy requirement and maintenance. It is believed that through implementation of these technologies the added stress on water demand caused by the erection of a Negin safari park in a drought hit region can be reduced. The implementation of these technologies can also further help in educating the local community and lead to encouragement of widespread implementation of these systems. This graduation project is an attempt to develop an informed relation between resource flows and spatial design in order to enable an uninterrupted functioning of the Safari park leading to prosperity of the region and its people. Architecture, Urbanism and Building Science
Performance of a low-noise test facility for the SAFARI TES bolometer arrays
No full textWe have constructed a test facility for characterizing the focal plane arrays of SAFARI, the far-infrared imaging spectrometer for the SPICA satellite. SAFARI’s three bolometer arrays are populated with extremely sensitive (NEP ? 2 × 10?19 W/? Hz) transition edge sensors with a transition temperature close to 100 mK. The extreme sensitivity and low saturation power (?4 fW) of SAFARI’s detectors present challenges to characterizing them. In optimizing the SAFARI Detector System Test Facility we have paid careful attention to stray-light exclusion as well as electrical, magnetic, and mechanical isolation.We present measurements verifying the facility’s performance and analyze them in terms of a two-fluid model of the TES current on the transition to investigate the background power level. We have measured a detector NEP of (5.1 ± 0.4) × 10?19 WHz?1/2, showing that the facility is ready to test the SAFARI prototype arrays and is approaching the performance needed for testing the flight arrays.Kavli Institute of NanoScienceApplied Science
Safari: a great adventure
No full textThis thesis explores the cultural history of Jungle Habitat, a drive-through safari park in West Milford, NJ, that was owned and operated by Warner Bros. from 1972 to 1976. Working back from its dates of operation, this thesis explores three chronologies that provide insight into Jungle Habitat’s existence as a strange confluence of wild animals, animal shows/rides, Looney Tunes shows and African dance performances. These chronologies, stemming from the late nineteenth and early twentieth centuries, are: (1) American safari expeditions to Africa to collect animal specimens; (2) the rise of hyper-realistic taxidermy dioramas in natural history museums; and (3) the capture of the non-human world using motion picture technology. Ideas from Donna Haraway’s feminist piece, “Teddy Bear Patriarchy: Taxidermy in the Garden of Eden, New York City, 1908-1936” and John Berger’s essay, “Why Look at Animals?” position these chronologies within the capitalist and colonialist legacy of wildlife conservation in the United States and as imaginaries for human behavior. The actions of President Theodore Roosevelt and taxidermist Carl Akeley figure prominently in this discussion. A visual synthesis consisting of archival photographs, custom View-Master reels, a site map, timelines, and artists’ books ties these threads of history and social criticism together.M.L.A.Includes bibliographical reference
Design Off-Grid Negin Safari Park: Passive Techniques to Reduce the Energy Demand
No full textThis research will examine a design for an off-grid safari park in Iran. During this research different passive techniques from the vernacular architecture will be discussed. These principles will be used to reduce the energy demand of the safari park, since it should be an off-grid park, in order to deliver a design proposal with an achievable energy balance. One of the buildings, the entrance building, will be used as a case study to test the design principles. The courtyard, the increase of mass and the windcatcher are the most important principles to be implemented in the building. The energy reduction achievable with these techniques is weighted against the increase in cost of the building. In the design of the entrance building, a combination of windcatchers and underground ducts is used to cool the building, reducing the energy demand for cooling with 90%. Other principles, like an increase in mass and a courtyard also reduce the energy demand of the building significantly. The use of vernacular principles in the design will increase the cost of the building. However, it will decrease the cost needed for generating energy on site and, therefore, it is still beneficial. Future research, should focus on the exact amount of energy needed compared to the additional cost for the construction of the buildings. However, this research concludes that the use of vernacular principles in the park is beneficial.Negin Safari ParkArchitecture, Urbanism and Building Sciences | Building Technolog
Theoretical and Textual Approaches to Contemporary Humanitarian Narrative: The Cases of Roberto Saviano’s Gomorra, Aung San Suu Kyi’s Letters from Burma, Jerry Piasecki’s Marie in the Shadow of the Lion and Nadine Gordimer’s The Ultimate Safari
No full textThe purpose of this thesis is to describe how some forms of fictional and non-fictional texts can be configured as and within the framework of humanitarian practices. In exploring the definitions and features of humanitarianism and humanitarian literature, the thesis attempts to answer the question of what purpose these texts try to serve. In examining the works Marie in the Shadow of the Lion (2000) by Jerry Piasecki, The Ultimate Safari (1989) by Nadine Gordimer, Gomorra (2006) by Roberto Saviano and Letters from Burma (1996) by Aung San Suu Kyi, we will argue that the scope of these books can be located by analogy to social and political humanitarian practices. Beyond their differences in genre, style and subject matter, these texts share a common feature: they are performative, namely they strive to do things with words. The humanitarian texts discussed in this thesis can be shown to act in the world in order to implement the values proclaimed in the Universal Declaration of Human Rights
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