197 research outputs found

    Was Aristotle a Naive Realist?

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    Honors (Bachelor's)PhilosophyUniversity of Michiganhttp://deepblue.lib.umich.edu/bitstream/2027.42/134724/1/makledmi.pd

    Hierarchical fault tolerance in wireless networked control systems

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    Wireless Networked Control Systems (WNCS) have recently emerged as a replacement for wired control networks. Wireless networked control systems are more suitable for environments that require higher flexibility and robustness. In previous literature a wireless manufacturing line was proposed. The work-cells communication was through IEEE 802.11 technologies and a switched Ethernet backbone. This thesis is aiming to improve the current solution by adding a supervisor to the existing system. The supervisor could be either in passive or active mode. Passive supervisor would intervene when all controllers in the network fail, while active supervisor would act once any controller on the line fail. The system was simulated using OPNET software with 95% confidence analysis. The ability of the system to withstand external interference was assessed through adding a single band jammer to the OPNET simulation. The system was able to hold up to 8KB interfering file sent from a single band jammer affecting the full Wi-Fi spectrum. All results were subjected to a 95% confidence analysis The performability of passive and active supervisor systems was compared. A Markov model of both systems was built. It was shown that by time, the performability of a passive supervisor system is enhanced while that of an active supervisor system degraded. However, the active supervisor showed a better performability in all cases

    The visual richness of rhythmic systems in fish and marine organisms as a source of inspiration and the development of innovative thinking for Wood Works students

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    The research deals with the aesthetics of visual richness resulting from the diversity of rhythmic systems in fish and marine organisms and their use as a starting point for the development of innovative thinking of woodwork students in the fourth division of the Department of Technical Education at the Faculty of Quality Education University of Fayoum, and the researcher aims in this research to benefit from the visual richness of rhythmic systems in fish and marine organisms as an innovative design starting point to draw inspiration from them with the aim of developing the innovative thinking of students in the field of woodwork arts, and enriching the building of wood-filled buildings with many aesthetic values and systems Rhythmic systems in fish and marine organisms vary into a range of species (formal rhythmic systems, linear rhythmic systems, color rhythm systems, touch rhythm systems, repetitive rhythmic systems, dynamic rhythmic systems resulting from the struggle of volumes, blocks and vacuums), The research also addressed the rhythmic systems in fish and marine organisms in nature, the most important types of fish and marine organisms and their use as a source of inspiration to enrich the building of woodwork, as well as innovative thinking and benefit from it in the field of woodwork arts, and the researcher drew the most important aesthetics of visual richness resulting from the diversity of rhythmic systems in fish and marine organisms and to use them as a springboard for the development of innovative thinking for students in the field of woodwork arts by drawing inspiration from them in order to reach technical formulations and solutions Composition and technique that can help enrich the construction of woodwork and include it in many aesthetic values and various rhythmic systems, The researcher classified the woodworks as the result of the student experiment into eight entries based on inspiration from the aesthetics of visual richness resulting from the diversity of rhythmic systems in fish and marine organisms: the first entrance: wooden works dealing with "fish of all kinds", second entrance: wooden works dealt with "fish and coral reefs", third entrance: wooden busyes dealing with "superstitious organisms and mermaids", fourth entrance: Wooden work on "sea octopus", entrance 5: wooden busyes dealt with "seahorse or seahorse", entrance 6: wooden busyes dealt with "fish and caporia", entrance 7: wooden busyes dealing with "fish, shells and sea snails", entrance 8: wooden busyes dealt with "starfish"

    The plastic entries of compositional structure in the work of artist "John Morris" and its aesthetic influence on the wooden work of the students of the Faculty of Specific Education, Fayoum University

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    The research deals with the analytical study of the intellectual and aesthetic approaches to structural constructivism in the works of the Australian artist "John Morris", who gained international fame due to his artistic success, which is due to his creative ideas that are characterized by strangeness and innovation and his artistic vision that distinguishes him from other artists, and which distinguishes his artwork and woodwork from others. Because of its various plastic and technical features and innovative and unconventional vocabulary, Morris relied, in formulating his artwork, on the method of dissection and fragmentation of the mechanics of the human body organs, such as skeletons, muscular anatomy and prosthetic limbs, especially in the mirror, depending on the element of excitement, and also the expression of winged characters that She took a surreal aspect by adding some wings of butterflies and birds to the various human figures by disintegrating, disassembling, reassembling and reassembling the disassembled elements with an updated vision and conscious thought. The first approaches: Wooden crafts dealing with the characters - Figures The second approaches: Wooden crafts dealing with winged figures - Winged Figures. The third approaches: Wooden artifacts that dealt with faces and heads - Heads and Faces. The Fourth approaches: For the Fourth Entrance: Wooden artifacts that dealt with birds and animals - Birds and Animals . The Fifth approaches: Wooden artifacts that dealt with drawing, painting and collage - Drawing and Painting and Collage.The researcher extracted the most important intellectual and aesthetic approaches to structural constructivism in the works of the artist “John Morris” and benefited from them in teaching the woodworks course to students of the fourth year at the Department of Art Education at Fayoum University by drawing inspiration from them and reaching artistic formulations and plastic and technical solutions that can help enrich the woodwork and include it with strangeness and innovation. Thus enriching the field of woodworking arts

    An Investigation into the Effects of Teacher Involvement and Influence on the Creativity of Children in the Classroom

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    Children have potential for demonstrating increased creativity where certain negative influences are removed during the creative process. These negative influences include the involvement of the teacher in the art and design class at school. This study establishes through primary and secondary research the different ways that teachers engage with children as potential influences that are tested through experimentation. The study was concerned with revealing levels of creativity in designs as well as signs of adult influence. The results revealed that different types of involvement do have a negative impact on creativity, especially giving children instructions

    Electrical conduction and dielectric relaxation in p-type PVA/CuI polymer composite

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    AbstractPVA/CuI polymer composite samples have been prepared and subjected to characterizations using FT-IR spectroscopy, DSC analysis, ac spectroscopy and dc conduction. The FT-IR spectral analysis shows remarkable variation of the absorption peak positions whereas DSC illustrates a little decrease of both glass transition temperature, Tg, and crystallization fraction, χ, with increasing CuI concentration. An increase of dc conductivity for PVA/CuI nano composite by increasing CuI concentration is recoded up to 15wt%, besides it obeys Arhenuis plot with an activation energy in the range 0.54–1.32eV. The frequency dependence of ac conductivity showed power law with an exponent 0.33<s<0.69 which predicts hopping conduction mechanism. The frequency dependence of both dielectric permittivity and dielectric loss obeys Debye dispersion relations in wide range of temperatures and frequency. Significant values of dipole relaxation time obtained which are thermally activated with activation energies in the range 0.33–0.87eV. A significant value of hopping distance in the range 3.4–1.2nm is estimated in agreement with the value of Bohr radius of the exciton

    Al Sheikh Abdul Hakim Zuein, Imam and the third preacher of the Great Mosque of Fallujah: A Study of his Life

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    This paper deals with an under-researched figure who preached across Iraq, particularly in Fallujah. He lived during the Ottoman and royal eras and worked as an imam and preacher in their army. Sheikh Abdul Hakim Zuein was a veteran, serving as an imam and preacher at the Great Mosque of Fallujah from 1928 to 1930. He passed away in 1947 and was buried in Baghdad

    Evaluation of Suitability of Rapid Prototyping Techniques for Use by Children

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    This is a paper produced by Rafat Madani as part of his PhD research, under the supervision of Dr Adam Moroz and Dr Emily Baines (both at De Montfort University), with some specialist advice from Belal Makled.Technology that facilitates rapid prototyping and rapid manufacturing has become increasingly available to the ordinary user in the home, the office, or at school. These rapid prototyping technologies should make it possible to offer school children the opportunity to design and then realise three dimensional (3D) objects. One of the perceived benefits of this is that children can become more involved in the process of producing 3D objects. Unfortunately, because of the nature of the available of the technology, and the issues associated with access to materials, adult help, supervision and assistance are often required, depriving children of the opportunity to create and produce freely, taking ownership of the process. This study evaluates the different techniques and materials available to children, highlighting their benefits and limitations, and reaching a conclusion about which materials and techniques are the most suitable for achieving a child-led approach to production. The study concludes that Cubify Cube is the most appropriate solution in terms of ease of use, not requiring adult assistance or supervision or the realisation of designs

    Towards a Circular Plastics Economy: Policy Solutions for Closing the Loop on Plastic

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    Over the past 50 years, plastic has emerged as one of the most ubiquitous materials in modern society. In the form of packaging, plastic has provided us with immense convenience and utility, particularly with regards to food preservation, safety, and environmental impacts, compared to alternative materials. Against this backdrop, the combination of single-use plastic packaging and low recycling rates has led to a global plastic pollution crisis, yielding more intense public and governmental scrutiny towards plastics than ever before. Simultaneously, China’s National Sword policy, which imposes strict contamination limits on imported recyclables and outright bans many popular plastic packaging types, has catalyzed immense disruption within the recycling ecosystem. Collectively, these disruptions have sharply reduced the availability of viable end markets for recycled plastic, ultimately leaving recyclers and governments around the world with nowhere to sell their plastic recyclables. Given this confluence of events, plastic packaging stakeholders face a critical juncture in determining plastic’s role within our society. Specifically, how can we sustainably produce, consume and dispose of plastic packaging in a manner that allows us to realize the material’s vital value? In other words, how can the plastic packaging industry, policymakers, NGOs, and other involved stakeholders design and advocate for a more circular plastics economy? This research seeks to answer this question based on the hypothesis that the use of public policies that facilitate the recovery and recyclability of plastics worldwide is critical for achieving the systemic changes required for the transition to a circular economy. As such, this research examines a wide array of policy tools around the world that have been implemented to reduce plastic pollution and increase plastic recycling rates, with the goal of providing the packaging industry and other stakeholders with insights and recommendations regarding the advantages and disadvantages of different policy options.Master of ScienceSchool for Environment and SustainabilityUniversity of Michiganhttps://deepblue.lib.umich.edu/bitstream/2027.42/148831/1/Towards a Circular Plastics Economy - Policy Solutions for Closing the Loop on Plastics_01.pd

    New observations on test architecture and construction of Jullienella foetida Schlumberger, 1890, the largest shallow-water agglutinated foraminifer in modern oceans

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    We present new observations on Jullienella foetida Schlumberger, 1890, a giant agglutinated foraminifer with a leaf- or fan-like test reaching a maximum dimension of 14 cm, that is common on some parts of the west African continental shelf. The test wall comprises a smooth, outer veneer of small (7.0 g wet weight m−2 for the seafloor biomass of J. foetida in areas where it is particularly abundant. The relatively restricted distribution of this species off the north-west African coast at depths above 100 m is probably related to the elevated, upwelling-related surface productivity along this margin, which provides enough food to sustain this high biomass. This remarkable species appears to play an important, perhaps keystone, role in benthic ecosystems where it is abundant, providing the only common hard substrate on which sessile organisms can settle
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