1,310 research outputs found

    Uncooled Infrared Detector Featuring Silicon based Nanoscale Thermocouple

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    The main focus of this dissertation is to improve the performance of thermoelectric (TE) infrared (IR) detectors. TE IR detectors are part of uncooled detectors that can operate at room temperature. These detectors have been around for many years, however, their performance has been lower than their contesting technologies. A novel high-responsivity uncooled thermoelectric infrared detector is designed, fabricated, and characterized. This detector features a single standalone polysilicon-based thermocouple (without a supporting membrane) covered by an umbrellalike optical-cavity IR absorber. It is proved that the highest responsivity in the developed detectors can be achieved with only one thermocouple. Since the sub-micrometer polysilicon TE wires are the only heat path from the hot junction to the substrate, a superior thermal isolation is achieved. A responsivity of 1800 V/W and a detectivity of 2 ? 10^8 (cm. sqrt(Hz)W^?1) are measured from a 20?m x 20?m detector comparable to the performance of detectors used in commercial focal planar arrays. This performance in a compact and manufacturable design elevates the position of thermoelectric IR sensors as a candidate for low-power, high performance, and inexpensive focal planar arrays. The improvement in performance is mostly due to low thermal conductivity of thin polysilicon wires. A feature is designed and fabricated to characterize the thermal conductivity of such a wire and it is shown for the first time that the thermal conductivity of thin polysilicon films can be much lower than that of the bulk. Thermal conductivity of ~110nm LPCVD polysilicon deposited at 620C is measured to be ~3.5W/m.K

    The Relationship between Organizational Intelligence and Organizational Agility in Teaching Hospitals of Yazd Shahid Sadoughi University of Medical Sciences

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    The Relationship between Organizational Intelligence and Organizational Agility in Teaching Hospitals of Yazd Shahid Sadoughi University of Medical Sciences Kiani MohammadMehdi1, Bahrami Mohammad Amin2*, Montazeralfaraj Raziyeh3, Falah Zadeh Hossein4, Mohammad Zadeh Morteza5 Introduction: Hospitals are the most important organizations in the field of healthcare services that require skilled personnel, necessary equipment, and suitable facilities; therefore, special attention to new and intelligent methods and also maximum use of intellectual abilities of individuals and organizations to increase hospitals agility seem to be necessary. The aim of this study was to examine the relationship between organizational intelligence and organizational agility in teaching hospitals of Yazd Shahid Sadoughi University of Medical Sciences. Methods: In this analytical cross-sectional study, a total of 370 administrative and medical staff were included using stratified-random sampling. The required data were collected using Albrecht organizational intelligence questionnaire and organizational agility questionnaire. Results: The results showed that organizational intelligence had effect on organizational agility (path coefficient=0.537). Mean scores of organizational intelligence and organizational agility of the hospitals were 2.29±0.66 and 2.29±0.37, respectively. Age had effect on both organizational intelligence (path coefficient=0.693) and organizational agility (path coefficient= 0.55). Conclusion: The findings showed that increasing the organizational intelligence of the organization provides the context for having an agile organization and the organization will reach its organizational goals faster. KeyÂŹwords: Organizational Intelligence, Organizational Agility, Teaching Hospitals, Administrative Staff, Medical Staff. ÂŹCitation: Kiani MM, Bahrami MA, Montazeralfaraj R, Falah Zadeh H, Mohammad Zadeh M. The Relationship between Organizational Intelligence and Organizational Agility in Teaching Hospitals of Yazd Shahid Sadoughi University of Medical Sciences. Journal of Health Based Research 2016; 2(2): 105-117. 1. PhD Student, Department of Management and Health Economics, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran 2. Associate Professor, Hospital Management Research Center, Shahid Sadoughi University of Medical Sciences and Health Services, Yazd, Iran, 3. Assistant Professor, Hospital Management Research Center, Shahid Sadoughi University of Medical Sciences and Health Services, Yazd, Iran 4. Professor, Department of Biostatistics and Epidemiology, Shahid Sadoughi University of Medical Sciences and Health Services, Yazd, Iran 5. PhD Student, Department of Biostatistics, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran *Correspondence: Department of Healthcare Management, School of Public Health, Campus of Shahid Sadoughi University, Yazd. Tel: 035-31492208 Email: [email protected]

    Urban Morphology, Environmental Performances & Energy Use: A Holistic Transformation Approach Applied to Block 39 in Belgrade (Serbia) Via IMM.

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    Cities are responsible up to 75% of energy consumptions and 80% of CO2 emissions and due to the fact that the correlation between urban morphology and environmental stewardship has become crystal clear.In this scenario is framed the case study of block 39 in Belgrade in which an innovative methodology, IMM (Integrated Modification Methodology), has been applied in order to transform an existing urban context into a more efficient and sustainable one. The presented case study in Belgrade aims to became a more general paradigm for similar condition in East Europe, defining integrated new strategies based on IMM methodology to retrofit and transform the energy dissipative existing neighborhood in more efficient, liveable and integrated urban system.The city is considered as a single complex entity composed by heterogeneous components connected each other. A strictly sectorial approach could result in neglecting mutual dependencies of these demands. Conversely, an integrated approach can help to sharpen a better comprehension of the different performances of different urban assessment. IMM methodology through Phasing Process shows how incorporating a wide range of issues makes it possible to improve the metabolism of the city as well as its energy performance

    On special subgroups of fundamental group

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    Suppose α\alpha is a nonzero cardinal number, I\mathcal I is an ideal on arc connected topological space XX, and PIα(X){\mathfrak P}_{\mathcal I}^\alpha(X) is the subgroup of π1(X)\pi_1(X) (the first fundamental group of XX) generated by homotopy classes of αI\alpha\frac{\mathcal I}{}loops. The main aim of this text is to study PIα(X){\mathfrak P}_{\mathcal I}^\alpha(X)s and compare them. Most interest is in α∈{ω,c}\alpha\in\{\omega,c\} and I∈{Pfin(X),{∅}}\mathcal I\in\{\mathcal P_{fin}(X),\{\varnothing\}\}, where Pfin(X)\mathcal P_{fin}(X) denotes the collection of all finite subsets of XX. We denote P{∅}α(X){\mathfrak P}_{\{\varnothing\}}^\alpha(X) with Pα(X){\mathfrak P}^\alpha(X). We prove the following statements: ∙\bullet for arc connected topological spaces XX and YY if Pα(X){\mathfrak P}^\alpha(X) is isomorphic to Pα(Y){\mathfrak P}^\alpha(Y) for all infinite cardinal number α\alpha, then π1(X)\pi_1(X) is isomorphic to π1(Y)\pi_1(Y); ∙\bullet there are arc connected topological spaces XX and YY such that π1(X)\pi_1(X) is isomorphic to π1(Y)\pi_1(Y) but Pω(X){\mathfrak P}^\omega(X) is not isomorphic to Pω(Y){\mathfrak P}^\omega(Y); ∙\bullet for arc connected topological space XX we have Pω(X)⊆Pc(X)⊆π1(X){\mathfrak P}^\omega(X)\subseteq{\mathfrak P}^c(X) \subseteq\pi_1(X); ∙\bullet for Hawaiian earring X\mathcal X, the sets Pω(X){\mathfrak P}^\omega({\mathcal X}), Pc(X){\mathfrak P}^c({\mathcal X}), and π1(X)\pi_1({\mathcal X}) are pairwise distinct. So Pα(X){\mathfrak P}^\alpha(X)s and PIα(X){\mathfrak P}_{\mathcal I}^\alpha(X)s will help us to classify the class of all arc connected topological spaces with isomorphic fundamental groups.Comment: 29 page

    A Reading of Joseph Conrad's The Tale

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    The Tale is a short story by Joseph Conrad. Typical of a Conrad story it is set at sea. The sea is symbolic of the unconscious and this story may be read as a story of the unconscious. On the outside, it seems simple; a man tells a woman a tale of the commanding officer of a patrol ship who gives false directions to another ship and sends it to its doom. In between the lines of the seemingly simple plot, however, can be read another tale; one which speaks of a human sea deeper than the sea of water; deeper, darker, and infinitely more mysterious. Man has navigated the sea of water but the unfathomed sea of his own being remains, for the most part, undiscovered. This is a sea different from the sea of this world and Conrad sets sail on it by telling a tale from another world. Sailing with Conrad, the reader can look out on the infinite vastness and try to form a picture of the infinite depth of a sea which is not visible to the human eye

    A Reading of Flannery O’Connors “Everything that Rises Must Converge”

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    Everything that rises must converge is a short story which, without the aid of suspense that is often provoked in fiction by actions hanging on a bare thread in a whirling plot of intertwining – and perhaps incredible – events, catches the reader‟s attention until the very last word. The plot of the story could not be any simpler; a young bachelor takes his overweight mother by bus to a „reducing class‟ but before they reach the place the mother changes her mind, heads back home, has a stroke and is left by her helpless son dying or maybe dead as he goes to seek help. But parallel to the plot of events is a “plot" of revelation; as the insignificantly banal happenings take place, an unfolding of character slowly emerges before the reader‟s eyes

    Images of the Female Countenance in Renaissance Literature

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    In her article "The politics of gender" Elaine Hobby gives a clear image of the confusion evoked in modern mentality by the juxtaposition of Renaissance literature and history. The romantic scenes portrayed in the wonderland of Renaissance poetry seem uncompromisable with the bare facts of historical record. As we contemplate the shadows obscuring the male permeated poetic language of the age however, we do discern spots of light illuminating the overall picture. The age has its own logic and its own language and although neither may be wholly appealing to the modern palate, both are, within their own historical framework, unequivocal and self-consciously assertive
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