2,578 research outputs found
BENNETT, TD Inventory of documents
No full textCOVERAGE 2 photosSA Police since 1920; Woolf Engineering (1937-1944); Oldfields Ltd. (1944-1956); Reserve Bank (1956-1970); Photographs related to Rand Strike of 192
Development of TD Website and Repository
Get PDFSEAFDEC, an Inter-Governmental Organization plays an important role in promotion of sustainable development of fisheries and aquaculture in the Southeast Asian Region for more than four decades. Cooperation with other regional and international organizations have been recognized through several important events such as Millennium Conference in 2001 and ASEAN-SEAFDEC Conference in 2011. Since 1990s, internet have been introduced worldwide, where information technology becomes important as a part of human life including education, economic, social and politicsand so on. Development of high speed internet creates a new communication system and support living style including works and activities such as public relations, multi-media production, publication etc., especially information dissemination and website which are technologies for communication between internal and external organization as well as in developing management system for efficiencies. The objective of this paper is to enhance SEAFDEC visibility by developing the information and dissemination system which developed new TD website in 2017.
In this regards, TD established Southeast Asian Fisheries Development Center, Training Department Institutional Repository (STIR), which is the official digital repository of scholarly, research and technical information of the Department to download all information materials using open source software named the DSpace.
In this paper, author considers the importance of information technology for introducing SEAFDEC/TD activities and improving access to SEAFDEC/TD technical/scientific articles was expressed via the website. In this regards, the author introduced for developing of the TD website and Repository to increase public relation and increase TD’s visibility as well as point out constrains of its development that requires the strengthening and cooperation within the Training Department of SEAFDEC
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Optical CDMA (O-CDMA) Technology Demonstrator (TD) for 2D Codes
No full textA TD based on wavelength/time codes, configured to multiplex and transmit 32 asynchronous Gigabit Ethernet data flows (GbE over O-CDMA), is described. The TD is user and data rate scalable
Electron Backscatter Diffraction Patterns from Titanium-added Interstitial-free Steel Containing Subgrains
No full text<h3><strong>Associated Publications</strong></h3>
<ol>
<li>Bennett IV, T.J. and Taleff, E.M. Dynamic Grain Growth Driven by Subgrain Boundaries in an Interstitial-Free Steel During Deformation at 850 °C. <em>Metall Mater Trans A</em> 55, 429–446 (2024). <a href="https://doi.org/10.1007/s11661-023-07256-w">https://doi.org/10.1007/s11661-023-07256-w</a>.</li>
<li>Bennett IV, T.J. and Taleff, E.M. Imaging and Segmenting Grains and Subgrains using Backscattered Electron Techniques. Under review (2024).</li>
</ol>
<h3><strong>Data Description</strong></h3>
<p>These data were collected by Thomas J. Bennett IV on July 28, 2022.</p>
<p>The electron backscatter diffraction (EBSD) data and associated electron backscatter diffraction patterns (EBSPs) contained herein were acquired from a titanium-added interstitial-free (Ti-IF) steel sheet material containing numerous subgrains. The Ti-IF steel specimen that provided these data was ramped to 850 degrees Celsius over 30 minutes, held at this temperature for one hour, and then deformed at a constant true-strain rate of 10^-4 s^-1. Upon reaching a final true strain of 0.225, the specimen was air quenched while maintaining a constant stress to preserve subgrains formed during high-temperature deformation. The tensile specimen was cut from a Ti-IF steel sheet received in a hard as-rolled condition with the tensile axis parallel to the sheet rolling direction. EBSPs were acquired from a section cut from the center of the deformed gage region using a JEOL JSM-IT300HR SEM equipped with an EDAX Velodity EBSD camera at the Center for Integrated Nanotechnologies.</p>
<p>The following conditions were used for EBSD data acquisition:</p>
<table>
<tbody>
<tr>
<td>Accelerating Voltage:</td>
<td>20 kV</td>
</tr>
<tr>
<td>Beam Current:</td>
<td>80%</td>
</tr>
<tr>
<td>Working Distance:</td>
<td>20.0 mm</td>
</tr>
<tr>
<td>Magnification:</td>
<td>200×</td>
</tr>
<tr>
<td>Dynamic Focus:</td>
<td>44 (out of 255, arbitrary units)</td>
</tr>
<tr>
<td>Specimen Tilt:</td>
<td>70 degrees</td>
</tr>
<tr>
<td>Scanning Grid Type:</td>
<td>Square</td>
</tr>
<tr>
<td>Step Size (x and y):</td>
<td>0.5 μm</td>
</tr>
<tr>
<td>Scan Size:</td>
<td>520 (across) × 340 (down) pixels</td>
</tr>
<tr>
<td>EBSD Camera Resolution:</td>
<td>446 × 446 pixels</td>
</tr>
<tr>
<td>EBSD Camera Binning:</td>
<td>1 × 1</td>
</tr>
<tr>
<td>EBSD Camera Exposure Time:</td>
<td>10 ms</td>
</tr>
<tr>
<td>Frame Averaging:</td>
<td>None</td>
</tr>
<tr>
<td>Specimen Tensile Direction:</td>
<td>Horizontal</td>
</tr>
<tr>
<td>Specimen Rolling Direction:</td>
<td>Horizontal</td>
</tr>
<tr>
<td>Specimen Long Transverse Direction:</td>
<td>Vertical</td>
</tr>
<tr>
<td>Specimen Short Transverse Direction:</td>
<td>Normal to plane</td>
</tr>
<tr>
<td>Pattern Center (EMSphInx Convention):</td>
<td>(x_pc, y_pc, L) = (-0.2 pixels, 112.76 pixels, 21736.4 μm)</td>
</tr>
<tr>
<td>EBSD Camera Elevation Angle:</td>
<td>3 degrees</td>
</tr>
<tr>
<td>EBSD Camera Screen Width:</td>
<td>32 mm</td>
</tr>
<tr>
<td>Pixel size on EBSD Camera Screen:</td>
<td>71.749 μm/pixel ( = 32000 μm / 446 pixels)</td>
</tr>
</tbody>
</table>
<p> </p>
<p><em>Note:</em> Conversions between different pattern center conventions may be found in the journal article below or at the following link: <a href="https://github.com/EMsoft-org/EMsoft/wiki/DItutorial">https://github.com/EMsoft-org/EMsoft/wiki/DItutorial</a>.</p>
<ul>
<li>Jackson, M.A., Pascal, E., and De Graef, M. Dictionary Indexing of Electron Back-Scatter Diffraction Patterns: a Hands-On Tutorial. <em>Integr Mater Manuf Innov</em> 8, 226–246 (2019). <a href="https://doi.org/10.1007/s40192-019-00137-4">https://doi.org/10.1007/s40192-019-00137-4</a>.</li>
</ul>
<h3><strong>File Descriptions</strong></h3>
<ul>
<li>Specimen_orientation.pdf - A schematic showing specimen reference directions and the orientation used for EBSD data acquisition.</li>
<li>Patterns.zip - A compressed archive containing Patterns.up2. This file contains 16-bit EBSPs and is 70,336,697,616 bytes (70.3 GB) uncompressed.</li>
<li>SHT_Indexed.ang - A file containing orientation data produced by indexing Patterns.up2 using EMSphInx. Orientations are represented by Euler angles (Bunge convention) and are to be interpreted using the EDAX Setting 2 convention (see MTEX documentation at <a href="https://mtex-toolbox.github.io/EBSDReferenceFrame.html">https://mtex-toolbox.github.io/EBSDReferenceFrame.html</a>).</li>
<li>SHT_Indexed.h5 - A file in HDF5 format containing orientation data and other relevant information produced by indexing Patterns.up2 using EMSphInx.</li>
<li>SHT_Indexed_IPFmap.png - An image of an inverse pole figure map colored with respect to the short transverse direction showing the data from SHT_Indexed.ang.</li>
</ul>
<p><em>Note:</em> The basic format of "up2" files is the following. The first 4 bytes provide the version number. The second 4 bytes are the width of the patterns. The third 4 bytes are the height of the patterns. The fourth 4 bytes are the starting position of the pattern image data.</p>
<h3><strong>Acknowledgments</strong></h3>
<p>The authors gratefully acknowledge support from the National Science Foundation under Grant DMR-2003312 and instrumentation under Grant DMR-9974476. The authors also gratefully acknowledge support from the U.S. Department of Energy, Office of High Energy Physics under Grant DE-SC0009960. This work was performed, in part, at the Center for Integrated Nanotechnologies, an Office of Science User Facility operated for the U.S. Department of Energy (DOE) Office of Science by Los Alamos National Laboratory (Contract 89233218CNA000001) and Sandia National Laboratories (Contract DE-NA-0003525). The authors thank Mr. Thomas Cayia (Arcelor Mittal) for providing the interstitial-free steel material used for this study.</p>
On Rota-Baxter Nijenhuis TD algebra
No full textThere was a long standing problem of G. C. Rota regarding the classi- fication of all linear operators on associative algebras that satisfy algebraic identities. Initially, only very few of such operators were known, for example, the derivative operator, average operator, difference operator and Rota-Baxter operator. Recently, in a paper by L. Guo, W. Sit and R. Zhang, the authors revisited Rota’s problem by concentrating on two classes of operators; differ- ential type operators and Rota-Baxter type operators. One of the Rota-Baxter type operators they found is the Rota-Baxter Nijenhuis TD (RBNTD) oper- ator which puts together the terms of the well-known Rota-Baxter operator, Nijenhuis operator and Leroux’ TD operator. In this dissertation, we initiate a systematic study of the RBNTD operator, extending the previous works on the Rota-Baxter, Nijenhuis and TD operators. After giving basic properties and examples, we construct free commutative and then free (non-commutative) RBNTD algebras. We then use free RBNTD algebras to obtain an extension of the renowned dendriform algebra with five binary operations.Ph. D.Includes bibliographical referencesMonica AggarwalVita
Large Time Step and DC Stable TD-EFIE Discretized with Implicit Runge-Kutta Methods
Get PDFThe time domain-electric field integral equation (TD-EFIE) and its differentiated version are widely used to simulate the transient scattering of a time dependent electromagnetic field by a perfect electric conductor (PEC). The time discretization of the TD-EFIE can be achieved by a space-time Galerkin approach or, as it is considered in this contribution, by a convolution quadrature using implicit Runge-Kutta methods. The solution is then computed using the marching-on-in-time (MOT) algorithm. The differentiated TD-EFIE has two problems: 1) the system matrix suffers from ill-conditioning when the time step increases (low frequency breakdown) and 2) it suffers from the DC instability, i.e., the formulation allows for the existence of spurious solenoidal currents that grow slowly in the solution. In this article, we show that 1) and 2) can be alleviated by leveraging quasi-Helmholtz projectors to separate the Helmholtz components of the induced current and rescale them independently. The efficacy of the approach is demonstrated by numerical examples including benchmarks and real-life applications.Numerical Analysi
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Bit-Error-Rate Performance of a Gigabit Ethernet O-CDMA Technology Demonstrator (TD)
No full textAn O-CDMA TD based on 2-D (wavelength/time) codes is described, with bit-error-rate (BER) and eye-diagram measurements given for eight users. Simulations indicate that the TD can support 32 asynchronous users
“Dear Author": A Transparent SoTL Peer Review
Get PDFThis epistolary article is written as an extended SoTL peer review. It contains two sections: my preparatory work as peer reviewer and my actual review. In the first section, I remind myself of the function and processes of the SoTL peer review, what the author expects from a SoTL peer reviewer, and how I see my role as a peer reviewer in SoTL. In the second section, I write my review, focusing on three common feedback areas in SoTL: how the author brings in existing scholarship, how the author describes their SoTL project, and how the author demonstrates its importance. My review concludes with some advice for navigating the potentially conflicting reviews that are not unusual in SoTL
Performance of TD-DFT for Excited States of Open-Shell Transition Metal Compounds
No full textTime-dependent density functional theory (TD-DFT) has been very successful in accessing low-lying excited states of closed-shell systems. However, it is much less so for excited states of open-shell systems: unrestricted Kohn-Sham based TD-DFT (U-TD-DFT) often produces physically meaningless excited states due to heavy spin contaminations, whereas restricted Kohn-Sham based TD-DFT often misses those states of lower energies. A much better variant is the explicitly spin-adapted TD-DFT (X-TD-DFT) [J. Chem. Phys. 2011, 135, 194106] that can capture all the spin-adapted singly excited states yet without computational overhead over U-TD-DFT. While the superiority of X-TD-DFT over U-TD-DFT has been demonstrated for open-shell systems of main group elements, it remains to be seen if this is also the case for open-shell transition metal compounds. Taking as benchmark the results by MS-CASPT2 (multistate complete active space second-order perturbation theory) and ic-MRCISD (internally contracted multireference configuration interaction with singles and doubles), it is shown that X-TD-DFT is indeed superior to U-TD-DFT for the vertical excitation energies of ZnH, CdH, ScH2, YH2, YO, and NbO2. Admittedly, there exist a few cases where U-TD-DFT appears to be better than X-TD-DFT. However, this is due to a wrong reason: the underestimation (due to spin contamination) and the overestimation (due to either the exchange-correlation functional itself or the adiabatic approximation to the exchange-correlation kernel) happen to be compensated in the case of U-TD-DFT. As for [Cu(C6H6)(2)](2+), which goes beyond the capability of both MS-CASPT2 and ic-MRCISD, X-TD-DFT revises the U-TD-DFT assignment of the experimental spectrum.National Natural Science Foundation of China [21603134, 21673174, 21273011, 21290192]; Double First-class University Construction Project of Northwest UniversitySCI(E)ARTICLE203929-394212
Developing countries and the Uruguay Round : negotiations on services
Get PDFIn the late 1980s many developing countries experienced something of a pardigm shift: governments began to pursue more market-oriented domestic policies. There was an increasing perception that liberalizing access to service markets was a potentially low-cost, effective method for improving the quality and efficiency of domestic service sectors. These unilateral policy developments increased the incentives for developing countries as a group to participate in a multilateral agreement to liberalize trade in services. The author explores the extent to which the initial negotiating positions of developing countries are reflected in the draft General Agreement on Trade in Services (GATS) that has emerged from the Uruguay Round negotiations. He investigates whether the unilateral policy changes implemented by many developing countries in the late 1980s had a discernible impact on the draft GATS for developing countries. Many developing countries are pursuing regulatory reform and liberalization. To what extent will signing the GATS help governments trying to make their service sectors more efficient? Is the result of the defensive negotiating strategy that was pursued consistent with the shift toward a policy of liberalizing service markets? This issue is of particular relevance insofar as recent liberalization-plus-privatization programs in developing countries were driven by external forces rather than domestic pressure (industry) groups - which might reduce the credibility of liberalization policies. Membership in a binding multilateral agreement could help bolster reform efforts by increasing the costs of backsliding.Trade and Services,Poverty Assessment,TF054105-DONOR FUNDED OPERATION ADMINISTRATION FEE INCOME AND EXPENSE ACCOUNT,Governance Indicators,Rules of Origin
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