8,635 research outputs found

    Retreat

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    Over one million copies have been sold of the self-help and awareness books Looking Out For Number One and Pulling Your Own Strings. Last year, 2.5 million people voluntarily underwent psychoanalysis for anxiety disorders. In the last thirty years, hundreds of religions have formed in the United States alone. This is the problem, and the concern of this thesis, that modern man is desperately searching many possibilities for a renewal of contact with his self, with meaning in his life. So this study will concentrate on the architectural design of still another potential avenue in this search; the retreat, the getaway wherein modern man seeks some reassuring collection of answers to the outrageous demands of an overwhelming society. The method of this thesis, then, will be to first address these elusive answers with some appropriate questions. What is wrong with our society that man often feels this struggle of self? What can we learn from what has been done and is being done to reconcile meaning in life with everyday existence? Then, how must an architecture address this required fullness of experience in terms of a retreat center? And finally, how does this all translate into an actual design process, and beyond to an architectural statement? The following sections of text relate directly to this sequence of questions. Now, to the conclusions of the design, it is hoped that through a marriage of architectural, philosophic, and humanist viewpoints, both in subject matter and in the actual design approach - that through these means the end will emerge as a more aware, socially topical architectural work as a statement of my own design concerns. Beyond this, I leave the manuscript to the reader\u27s own conclusions

    Fabrication of Infrared Photodetectors Utilizing Lead Selenide Nanocrystals

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    Colloidal lead selenide and lead selenide / lead sulfide core/shell nanocrystals were grown using a wet chemical synthesis procedure. Absorbance and photoluminescence measurements were made to verify the quality of the produced nanocrystals. Absorbance spectra were measured at room temperature, while photoluminescence spectra were measured at 77 K. Organic ligands were exchanged for shorter ligands in order to increase the conductivity of the nanocrystals. Absorption and PL spectra for both core and core/shell nanocrystals were compared. Interdigital photodetector devices with varying channel widths were fabricated by depositing gold onto a glass substrate. Lead selenide nanocrystals were deposited onto these metallic structures using drop casting. Current-voltage characterization was performed on these devices and showed approximately one order of magnitude enhancement in the photocurrent. The detectivity and responsivity were extracted from the current-voltage characterization

    Augmentation of Electrical Power Laboratory Students Learning Experience Through Simulations Software Enhancements During COVID-19

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    The quest for experienced Electrical Power Engineers in today\u27s workforce is increasing as Supervision Control and Data Acquisition-Internet of Things (SCADA- IOT) systems continue to be integrated into the power grid, thus making the grid smarter. The overall electric power network is undergoing changes due to the industrial use of smart machines incorporating power electronics devices and the deployment of renewable energy resources such as photo-voltaic and wind power generators. The challenges that have been generated as a result of this power grid modernization require universities and technical education institutions to modify their power engineering curriculum to include more of engineering students\u27 hands-on practical laboratory experience. Additionally, the onset of the COVID-19 pandemic at the beginning of the year 2020 has created the awareness of the importance of necessary changes in the way laboratory classes are taught to improve student\u27s learning experience as well as achieve the desired learning objectives before the students graduate into the industry. Face-to-face laboratory courses need to be modified to satisfy mandated COVID 19 social distancing and other requirements. While the quest for experienced Electrical Power Engineers in today\u27s workforce is increasing as Supervision Control and Data Acquisition-Internet of Things (SCADA- IOT) systems continue to be integrated into the power grid. The grid smarter recent COVID-19 based limitations imposed on face-to-face teaching is most likely to adversely affect adequate delivery of laboratory instructions to engineering students. This study focuses on an electrical power laboratory course conducted in the wake of the COVID-19 pandemic using Electro-Mechanical System (EMS), where experiments with simulations, practical modules implementation and Data Acquisition and Control Interface (DACI) method are utilized to enhance the Laboratory experience. Electromechanical Systems Simulation Software, a web-browser based application, is used in the EMS simulations. The study examines the effectiveness of the simulations method together with remote practical demonstrations of power laboratory experiments. Every experiment conducted remotely to familiarize students with the operation of the power industry is accompanied by students\u27 computer simulations. The laboratory reports submitted by students are used to assess the result of the remote course delivery which is found to be satisfactory and more engaging to students than the traditional face-to-face teaching method

    Selenoxopropadienylidene (CCCSe) as a bridging ligand

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    The reaction of [W(≡CC≡CSiMe3)(CO)2(Tp*)] (Tp* = hydrotris(3,5-dimethylpyrazol-1-yl)borate) with [nBu4N]F and selenium in the presence of [RuCl(PPh3)2(η-C5H5)] affords a mixture of the tricarbido complex [WRu(μ-CCC)(CO)2(PPh3)2(η-C5H5)(Tp*)] and the selenoxopropadienylidene (C3Se) complex [WRu(μ-CCCSe)(CO)2(PPh3)2(η-C5H5)(Tp*)], both of which were structurally characterized. The formation of the bimetallic C3Se complex is consistent with the intermediacy of the salt [nBu4N] [W(≡CC≡CSe)(CO)2(Tp*)], which could be observed spectroscopically and computationally interrogated, but not yet isolated.This work was supported by the Australian Research Council (DP130102598 and DP110101611)

    The new merger: combining third sector and market-based approaches to tackling inequalities

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    In this paper we discuss the challenge posed by growing inequalities, specifically health inequalities, which have grown increasingly wider in recent decades. Rather than arguing for a wholesale return to state intervention to curb the worst excesses of the market, we put forward a less obvious potential solution, arguing for a greater role - and greater recognition - for the 'social economy': the part of the third or non-profit sector concerned with trading in the market rather than relying upon public funds or charitable donations to stay in business. We present three examples of such organisations, drawn from the UK, and discuss how doing business in such a way presents obvious benefits for, but challenges to, existing thinking, particularly in relation to how 'success' should be measured

    Novel carbon monochalcogenide coordination mode: [Rh2{μ-SeCMo(CO)2(Tp*)}2(η4-cod)2] (Tp* = hydrotris(3,5-dimethylpyrazol-1-yl)borate; cod = cyclo-octa-1,5-diene)

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    The reaction of [Et4N][Mo(CSe)(CO)2(Tp*)] (Tp* = hydrotris(3,5-dimethylpyrazol-1-yl)borate) with [Rh2(μ-Cl)2(η4-cod)2] (cod = cyclo-octa-1,5-diene) results in the formation of the tetrametallic complex [Rh2{SeCMo(CO)2(Tp*)}2(η4- cod)2] in which the CS

    Halogenation of A-frame µ-carbido complexes: synthesis of µ₂-halocarbynes

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    The reaction of [Rh2(μ-C)Cl2(PPh3)4] with bis(diphenylphosphino)methane (dppm) affords the A-frame μ-carbido complex [Rh2(μ-C)Cl2(μ-dppm)2], halide metathesis of which provides [Rh2(μ-C)Br2(μ-dppm)2]. The reactions of the former with PhICl2 or the latter with [pyH][Br3] provide rare examples of μ2-halocarbyne ligands in the complexes [Rh2(μ-CX)(μ-X)X4(μ-dppm)2] (X = Cl, Br). Graphical abstract: Halogenation of A-frame μ-carbido complexes: synthesis of μ2-halocarbynes Linear bimetallic μ-carbido complexes may be described by one of three distinct bonding modes (Chart 1) depending on the effective atomic number requirements of the metal termini. The simplest and oldest1 involve identical metal termini and are best described as dimetallacumulenic in nature (Class A, Chart 1) with two formal M[double bond, length as m-dash]C double bonds.We gratefully acknowledge the Australian Research Council (DP170102695 and DP190100723) for funding

    Towards a framework for the evaluation of efficient provisioning in opportunistic ad-hoc networks

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    In wireless ad-hoc networks where there is no continuous end-to-end path we move into the area of opportunistic networks. Forwarding messages via any encountered nodes, such as the mobile devices that many users already carry. Normally we are looking for the most efficient method of passing these messages across the network, but how do we evaluate the different methods. We propose to develop a framework that will allow us to evaluate how efficiently provisioning has been performed. This has been explored with the use of a case study and two benchmark protocols, Epidemic and PRoPHET. We present the results of this analysis and describe an approach to the validation of this through simulation

    Methimazolyl based diptych bicyclo-[3.3.0]-ruthenaboratranes

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    The reactions of [RuCl(R)(CO)(PPh3)2] (R = CH[double bond, length as m-dash]CHPh, Ph) with Na[H2B(mt)2] (mt = N-methyl-2-mercaptoimidazolyl) transiently provide [Ru(R)(CO)(PPh3){κ3-H,S,S′-H2B(mt)2}] which each evolve to the ruthenaboratrane [Ru(CO)(PPh3)2{κ3-B,S,S′-BH(mt)2}](Ru→B)8. The phosphine ligands may be selectively replaced to provide the complexes [Ru(CO)(L)(PPh3){κ3-B,S,S′-BH(mt)2}] (L = CO, PMe2Ph) and [Ru(CO)L2{κ3-B,S,S′-BH(mt)2}] (L = PMe2Ph, P(OMe)3, L2 = Z-Ph2PCH[double bond, length as m-dash]CHPPh2) with, in each case, retention of the ruthenium–boron dative bond.This work was supported by the Australian Research Council (DP170102695)

    Equations of Electrogasdynamics and Applications

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    This report presents in summary work done in the period from 1959 to 1963 at the Hypersonic Research Project, Graduate Aeronautical Laboratories California Institute of Technology, on some theoretical aspects of the dynamics of ionized gases. The objective of this work was to set up a system of conservation equations when no magnetic field or complicated chemical effects are present. Emphasis is placed on the gross exchange processes among species at a point, rather than the gradient transport mechanisms (e. g. , viscosity and heat conduction); in the past this point of view was often called "Gaseous Electronics". In subordinatipg the magnetic field and the chemistry to the dynamics it has been possible to explain a gratifying number of commonplace physical phenomena from first principles and to demonstrate the intimate connection between gaseous electronics and aerodynamics. The conservation equations needed for a neutral-ion-electron mixture were derived with the aid of the elementary integral transport (Maxwell-Chapman) theory exactly as used for any ternary mixture. Departures made necessary because of the ionization include (a) the collisionless ("Vlasov") approximation, (b) a reformulation of the Chapman-Enskog prosedure to include electric forces and (c) a convenient recourse to the inverse-fifth-power interparticle force law. Even so the resulting equations are merely a re-statement of the formidable problem of plasma physics. "Inviscid" equations are therefore written as counterparts of the inviscid (ideal) equations of aerodynamics. To illustrate where mathematical difficulties first appear, practical problems are solved with the aid of further approximations. These problems, as well as the physical departures mentioned above, are relegated to Appendices
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