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Experimental and Computational Preference for Phosphine Regioselectivity and Stereoselective Tripodal Rotation in Hos₃(Co)₈(PPh₃)₂(μ-1,2-N,Cη-¹,ᴋ¹-C₇H₄NS)

Description: This article investigates the site preference for ligand substitution in the benzothiazolate-bridged cluster HOs₃(CO)₁₀(μ-1,2-N,Cη-¹,ᴋ¹-C₇H₄NS) using PPh₃.
Date: September 12, 2018
Creator: Begum, Shahin A.; Chowdhury, Md. Arshad H.; Ghosh, Shishir; Tocher, Derek A.; Richmond, Michael G.; Yang, Li et al.
Partner: UNT College of Arts and Sciences

Magnetic ordering in a vanadium-organic coordination polymer using a pyrrolo[2,3-d:5,4-d0] bis(thiazole)-based ligand

Description: This article presents the synthesis and characterization of a hybrid vanadium-organic coordination polymer with robust magnetic order, a Curie temperature TC of ~110 K, a coercive field of ~5 Oe at 5 K, and a maximum mass magnetization of about half that of the benchmark ferrimagnetic vanadium(tetracyanoethylene)~₂ (V·(TCNE)~₂).
Date: October 11, 2018
Creator: Getmanenko, Yulia A.; Mullins, Christopher S.; Nesterov, Vladimir N.; Lake, Stephanie; Risko, Chad & Johnston-Halperin, Ezekiel
Partner: UNT College of Arts and Sciences

The 2019 materials by design roadmap

Description: This roadmap article presents an overview of the current state of computational materials prediction, synthesis and characterization approaches, materials design needs for various technologies, and future challenges and opportunities that must be addressed.
Date: October 24, 2018
Creator: Albieri, Kirstin; Buongiorno Nardelli, Marco; Zakutayev, Andriy; Mitas, Lubos; Curtarolo, Stefano; Jain, Anubhav et al.
Partner: UNT College of Arts and Sciences

Bergson, Materialization, and the Peculiar Nature of Space

Description: This article shows how Bergson's notions of variable lived space and the dynamic character of physical matter could lead to theories of fractal dimension and theories of the creation and expansion of matter.
Date: 2018
Creator: Gunter, P. A. Y. (Pete Addison Y.), 1936-
Partner: UNT College of Arts and Sciences

Polarizable ab initio QM/MM Study of the Reaction Mechanism of N-tert-Butyloxycarbonylation of Aniline in [EMIm][BF4]

Description: This article presents the use of AMOEBA-based polarizable ab initio AM/MM simulations to investigate the reaction mechanism of the N-tert-butoxycarbonylation of aniline in a water/1-ethyl, 3-methyl imidazolium/tetrafluoroborate mixture.
Date: October 31, 2018
Creator: Vázquez-Montelongo, Erik Antonio; Vázquez-Cervantes, José Enrique & Cisneros, Gerardo Andrés
Partner: UNT College of Arts and Sciences

Serial Verbs and Complex Paths in Klallam

Description: This article describes and illustrates the construction of complex paths and discusses the place of Klallam in a typology of motion events.
Date: 2008
Creator: Montler, Timothy
Partner: UNT College of Arts and Sciences

Inclusive jet cross sections at the D{O} detector

Description: The D0 calorimeter gives uniform response, hermetic coverage and stable calibration for detection of jets produced in p{bar p} collisions out to a pseudo-rapidity {vert_bar}{eta}{vert_bar} = 4.1. Jet triggers are implemented for {vert_bar}{eta}{vert_bar}{le}3.2. We present preliminary distributions for inclusive jet production versus p{sub T}.
Date: November 1, 1992
Creator: Astur, R. V.
Partner: UNT Libraries Government Documents Department

The effects of aging on Boiling Water Reactor core isolation cooling system

Description: A study was performed to assess the effects of aging on the Reactor Core Isolation Cooling system in commercial Boiling Water Reactors. This study is part of the Nuclear Plant Aging Research program sponsored by the US Nuclear Regulatory Commission. The failure data, from national databases, as well as plant specific data were reviewed and analyzed to understand the effects of aging on the RCIC system. This analysis identified important components that should receive the highest priority in terms of aging management. The aging characterization provided information on the effects of aging on component failure frequency, failure modes, and failure causes.
Date: June 1, 1994
Creator: Lee, Bom Soon
Partner: UNT Libraries Government Documents Department

Local control stations

Description: This paper describes research concerning the effects of human engineering design at local control stations (i.e., operator interfaces located outside the control room) on human performance and plant safety. The research considered both multifunction panels (e.g. remote shutdown panels) as well as single-function interfaces (e.g., valves, breakers, gauges, etc.). Changes in performance shaping factors associated with variations in human engineering at LCSs were estimated based on expert opinion. By means of a scaling procedure, these estimates were used to modify the human error probabilities in a PRA model, which was then employed to generate estimates of plant risk and scoping-level value/impact ratios for various human engineering upgrades. Recent documentation of human engineering deficiencies at single-function LCSs was also reviewed, and an assessment of the current status of LCSs with respect to human engineering was conducted.
Date: May 1, 1993
Creator: Brown, W. S.; Higgins, J. C. & Wachtel, J. A.
Partner: UNT Libraries Government Documents Department

Commissioning status of the Continuous Wave Deuterium Demonstrator

Description: Grumman Aerospace Corporation, Argonne National Laboratory, and Culham Laboratory are commissioning the Continuous Wave Deuterium Demonstrator (CWDD) in a facility at Argonne National Laboratory. CWDD is a high-brightness, high-current, 7.5-MeV negative deuterium accelerator. The 352-MHz rf accelerating cavities are cryogenically cooled with supercritical neon to reduce the rf power requirements. Installation of the accelerator into the Argonne facility began in May 1991, and first beam from the injector was extracted in February 1992. The accelerator and facility are described, and current status and future plans are discussed.
Date: June 1, 1993
Creator: Hartog, P. D.; Dooling, J.; Lorello, M.; Rathke, J.; Carwardine, J.; Godden, D. et al.
Partner: UNT Libraries Government Documents Department

Application of network technology to Remote Monitoring System

Description: The Australian Safeguards Office (ASO) and the US Department of Energy (DOE) have sponsored work under a bilateral agreement to implement a Remote Monitoring System (RMS) at an Australian nuclear site operated by the Australian Nuclear Science and Technology Organization (ANSTO). The RMS, designed by Sandia National Laboratories (SNL), was installed in February 1994 at the Dry Spent Fuel Storage Facility (DSFSF) located at Lucas Heights, Australia. The RMS was designed to test a number of different concepts that would be useful for unattended remote monitoring activities. The DSFSF located in Building 27 is a very suitable test site for a RMS. The RMS uses a network of low cost nodes to collect data from a number of different sensors and security devices. Different sensors and detection devices have been installed to study how they can be used to complement each other for C/S applications. The data collected from the network will allow a comparison of how the various types of sensors perform under the same set of conditions. A video system using digital compression collects digital images and stores them on a hard drive and a digital optical disk. Data and images from the storage area are remotely monitored via telephone from Canberra, Australia and Albuquerque, NM, USA. These remote monitoring stations operated by ASO and SNL respectively, can retrieve data and images from the RMS computer at the DSFSF. The data and images are encrypted before transmission. The Remote Monitoring System field tests have been operational for six months with good test results. Sensors have performed well and the digital images have excellent resolution. The hardware and software have performed reliably without any major difficulties. This paper summarizes the highlights of the prototype system and the ongoing field tests.
Date: August 1, 1994
Creator: Johnson, C. S.; Sorokowski, D. L. & Veevers, K.
Partner: UNT Libraries Government Documents Department

Experimental investigations of superconductivity in quasi-two-dimensional epitaxial copper oxide superlattices and trilayers

Description: Epitaxial trilayer and superlattice structures grown by pulsed laser ablation have been used to study the superconducting-to-normal transition of ultrathin (one and two c-axis unit cells) YBa{sub 2}Cu{sub 3}O{sub 7{minus}x} layers. The normalized flux-flow resistances for several epitaxial structures containing two-cell-thick YBa{sub 2}Cu{sub 3}O{sub 7{minus}x} films collapse onto the ``universal`` curve of the Ginzburg-Landau Coulomb Gas (GLCG) model. Analysis of normalized resistance data for a series of superlattices containing one-cell-thick YBa{sub 2}Cu{sub 3}O{sub 7{minus}x} layers also is consistent with the behavior expected for quasi-two-dimensional layers in a highly anisotropic, layered three-dimensional superconductor. Current-voltage measurements for one of the trilayer structures also are consistent with the normalized resistance data, and with the GLCG model. Scanning tunneling microscopy, transmission electron microscopy, and electrical transport studies show that growth-related steps in ultrathin YBa{sub 2}Cu{sub 3}O{sub 7{minus}x} layers affect electrical continuity over macroscopic distances, acting as weak links. However , the perturbation of the superconducting order parameter can be minimized by utilizing hole-doped buffer and cap layers, on both sides of the YBa{sub 2}Cu{sub 3}O{sub 7{minus}x} layer, in trilayers and superlattices. These results demonstrate the usefulness of epitaxial trilayer and superlattice structures as tools for systematic, fundamental studies of high-temperature superconductivity.
Date: June 1, 1993
Creator: Lowndes, D. H. & Norton, D. P.
Partner: UNT Libraries Government Documents Department

Technology challenges: Open source information management and analyst efficiency tools

Description: The subject of detecting nuclear weapons fabrication and proliferation is discussed from the viewpoint of a large knowledge based information system. Utilizing technical information from personnel who have years of experience in the US nuclear weapons program is proposed.
Date: May 1, 1993
Creator: Fox, T. R.
Partner: UNT Libraries Government Documents Department