102,439 research outputs found
Tacoma Hotel, rear view, Tacoma, Washington, approximately 1888
No full textPhotograph of a drawing.
PH Coll 332.72To order a reproduction, inquire about permissions, or for information about prices see: http://www.lib.washington.edu/specialcollections/services/reproduction/reproduction Please cite the Order NumberScanned from a photographic print using a Microtek Scanmaker 9600XL at 100 dpi in JPEG format at compression rate 3 and resized to 768x512 ppi. 1999
Rev. Myron Eels, approximately 1880s
No full textPH Coll 332.80Myron Eels was born to pioneer missionaries Cushing and Myra Eels in 1843 in Spokane, Washington. Myron Eels father, Cushing Eels worked to create Whitman College in 1859. In 1871 Myron attended Hartford Theological Seminary in Connecticut and by 1874 he was working as a missionary on the Skokomish Reservation. He is known for his extensive research into the histories of the Pacific Northwest and its peoples.To order a reproduction, inquire about permissions, or for information about prices see: http://www.lib.washington.edu/specialcollections/services/reproduction/reproduction Please cite the Order Numbe
Tacoma Hotel, Tacoma, Washington, approximately 1888
No full textPhotograph of a drawing.
On verso of image: The Tacoma
PH Coll 332.71To order a reproduction, inquire about permissions, or for information about prices see:
http://www.lib.washington.edu/specialcollections/services/reproduction/reproduction
Please cite the Order NumberScanned from a photographic print using a Microtek Scanmaker 9600XL at 100 dpi in JPEG format at compression rate 3 and resized to 768x512 ppi. 1999
On the Parameterized Complexity of Biclique Cover and Partition
No full textGiven a bipartite graph G, we consider the decision problem called BicliqueCover for a fixed positive integer parameter k where we are asked whether the edges of G can be covered with at most k complete bipartite subgraphs (a.k.a. bicliques). In the BicliquePartition problem, we have the additional constraint that each edge should appear in exactly one of the k bicliques. These problems are both known to be NP-complete but fixed parameter tractable. However, the known FPT algorithms have a running time that is doubly exponential in k, and the best known kernel for both problems is exponential in k. We build on this kernel and improve the running time for BicliquePartition to O*(2^{2k^2+k*log(k)+k}) by exploiting a linear algebraic view on this problem. On the other hand, we show that no such improvement is possible for BicliqueCover unless the Exponential Time Hypothesis (ETH) is false by proving a doubly exponential lower bound on the running time. We achieve this by giving a reduction from 3SAT on n variables to an instance of BicliqueCover with k=O(log(n)). As a further consequence of this reduction, we show that there is no subexponential kernel for BicliqueCover unless P=NP. Finally, we point out the significance of the exponential kernel mentioned above for the design of polynomial-time approximation algorithms for the optimization versions of both problems. That is, we show that it is possible to obtain approximation factors of n/log(n) for both problems, whereas the previous best approximation factor was n/sqrt(log(n))
Bibliographie Hilarion G. Petzold 1958 – 2009 mit Anhang als Einführung
No full textDieses Archiv enthält die Gesamtbibliographie der Werke des Autors nebst einiger Texte „Über H. G. Petzold“ im Schlussteil der Bibliographie sowie einen Anhang mit einer Einführung in die Architektur des Werkes in seinem wissenslogischen Aufbau als Ausarbeitung seines „Tree of Science Modells“ (2007).This archive contains the complete bibliography of the author and some texts about H. G. Petzold, moreover an epilogue with an introduction to the architecture of the works in its epistemological structure and composition and as an elaborations of Petzold’s „Tree of Science Modell (2007).https://www.fpi-publikation.de/polyloge/01-2009-petzold-h-g-gesamtbibliographie-h-g-petzold-1958-2009-updating-november2009/peerReviewedpublishedVersio
Dispelling the Myths Behind First-author Citation Counts
No full textWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
The effect of crack-tip interactions on the curve-fitting of mixed-mode isopachics
No full textThermoelastic Stress Analysis (TSA) is a full-field technique for experimental stress analysis that has proved to be extremely effective for studying stress fields in the vicinity of crack-tips. An understanding of such fields is vital to the development of effective diagnosis and prognosis algorithms for Non-Destructive Testing (NDT) and Structural Health Monitoring (SHM). The key to crack-tip studies using TSA is the observation that the stress-sum contours (isopachics) in the vicinity of the tip take the form of a simple curve – the cardioid. This was exploited in [1] in order to estimate the Stress Intensity Factors (SIFs) for crack-tips in mode 1 and mixed-mode opening. The analysis [1] made use of the cardioid nature of the isopachics by deriving expressions for the SIFs in terms of the cardioid area and the positions of certain tangents to the curve.Recent work by the authors has allowed the estimation of crack-tip Stress Intensity Factors (SIFs) by curve-fitting a cardioid form to measured isopachics from Thermoelastic Stress Analysis (TSA). Both Genetic Algorithms (GAs) [2] and Differential Evolution (DE) [3] proved successful for the actual parameter estimation, but some of the curve-fits indicated that the cardioid form was inappropriate for the base model. A possible explanation for the poor curve-fit is that the cardioid form is only theoretically suitable for an isolated crack-tip stress field, as derived from the Westergaard equations. The effect of the other crack-tip in a central crack hac been neglected from previous analyses. Further work has [4] considered a mode 1 central crack, placed in a plate, which therefore had two interacting crack-tips. Figure 1 shows the analytically derived stress sum field around both an isolated mode 1 crack and a twin crack-tip. The curves for an isolated crack-tip are shown as solid lines – these curves are true cardioids. The curves for the twin crack-tip case are shown as dashed lines. It is clear that these curves are not cardioids, although the level of distortion is quite small for the inner curves. The object of the current paper is to determine numerically, the stress field for a mixed-mode crack system and to quantify the effect of any interactions on the curve-fitting procedure and compare with experimental data for a 30o crack
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3346: Samuel G. Freedman, author, 2013
No full textPhotograph of author Samuel G. Freedman, at NT Daily Slash meeting in the Mayborn School of Journalism at UNT
Electrochemical properties of BiFeO 3 nanoparticles: Anode material for sodium-ion battery application
No full textWe report on synthesis and possibilities of utilizing BiFeO3 (BFO) nanoparticles and bulk materials as an anode component for sodium (Na) ion batteries. XRD and Raman spectroscopy measurements shows that as synthesized BFO exhibits rhombohedrally distorted perovskite structure. Cyclic voltammetry (CV) reveals that conversion redox mechanism takes place at first discharge and subsequently two alloying process. The specific capacity of BFO bulk material is seen to be 650 mAh/g at first cycle and gradually decreases to 250 mAh/g after 30 cycles (0.1 C rate). After 30 cycles, capacity fading takes place very slowly and is observed to be 180 mAh/g at 100th cycle. The discharge capacity of BFO material at different current rates is carried out and the better performance is seen at the current rates of 25 mA/g. The conversion reaction mechanism during the electrochemical reaction in BiFeO3 is probed by combining ex-situ XRD and XPS measurements after electrochemical cycling. CV of BFO nanoparticles exhibit very stable performance. Whereas, the charge discharge curve shows similar capacity fading as the bulk BFO. High initial capacity of BiFeO3 gives an indication that it can be utilized as an anode component for Na ion batteries after stabilizing the capacity fading.
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