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41,673 Matching Results
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The Controlled Substances Act: Regulatory Requirements
This report highlights certain non-criminal regulatory requirements of the Controlled Substances Act(CSA).
Date:
December 13, 2012
Creator:
Yeh, Brian T.
Object Type:
Report
System:
The UNT Digital Library
A REMOTELY CONTROLLED METALLOGRAPH. PART II
A Bausch and Lomb metallograph that had been adapted so that it could be operated remotely was modified further to facilitate its operation. The instrument has performed satisfactorily in the examination of highly radioactive materials behind the heavy shielding of a high level cell. (auth)
Date:
December 1, 1959
Creator:
Leith, W.H.
Object Type:
Report
System:
The UNT Digital Library
The List
The List is a collection of short stories focusing on the inability to adapt, or learn from self-destructive patterns, and the bizarre ways people reach out for one another when they don't know what else to do.
Date:
December 2009
Creator:
O'Brien, Tanner Chase
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Optimally Controlled Flexible Fuel Powertrain System
The primary objective of this project was to develop a true Flex Fuel Vehicle capable of running on any blend of ethanol from 0 to 85% with reduced penalty in usable vehicle range. A research and development program, targeting 10% improvement in fuel economy using a direct injection (DI) turbocharged spark ignition engine was conducted. In this project a gasoline-optimized high-technology engine was considered and the hardware and configuration modifications were defined for the engine, fueling system, and air path. Combined with a novel engine control strategy, control software, and calibration this resulted in a highly efficient and clean FFV concept. It was also intended to develop robust detection schemes of the ethanol content in the fuel integrated with adaptive control algorithms for optimized turbocharged direct injection engine combustion. The approach relies heavily on software-based adaptation and optimization striving for minimal modifications to the gasoline-optimized engine hardware system. Our ultimate objective was to develop a compact control methodology that takes advantage of any ethanol-based fuel mixture and not compromise the engine performance under gasoline operation.
Date:
December 31, 2010
Creator:
Yilmaz, Hakan; Christie, Mark & Stefanopoulou, Anna
Object Type:
Report
System:
The UNT Digital Library
International lighting in controlled environments workshop: Proceedings
Lighting is a central and critical aspect of control in environmental research for plant research and is gaining recognition as a significant factor to control carefully for animal and human research. Thus this workshop was convened to reevaluate the technology that is available today and to work toward developing guidelines for the most effective use of lighting in controlled environments with emphasis on lighting for plants but also to initiate interest in the development of improved guidelines for human and animal research. There are a number of established guidelines for lighting in human and animal environments. Development of new lighting guidelines is necessary for three reasons: (1) recent scientific discoveries show that in addition to supporting the sensation of vision, light has profound nonvisual biological and behavioral effects in both animals and humans; (2) federal regulations (EPACT 1992) are requiring all indoor environments to become more energy efficient with a specific emphasis on energy conservation in lighting; (3) lighting engineers and manufacturers have developed a wealth of new light sources and lighting products that can be applied in animal and human environments. The workshop was aimed at bringing together plant scientists and physical scientists to interact in the discussions. It …
Date:
December 31, 1994
Creator:
unknown
Object Type:
Article
System:
The UNT Digital Library
Dynamic Resource Management in RSVP- Controlled Unicast Networks
Resources are said to be fragmented in the network when they are available in non-contiguous blocks, and calls are dropped as they may not end sufficient resources. Hence, available resources may remain unutilized. In this thesis, the effect of resource fragmentation (RF) on RSVP-controlled networks was studied and new algorithms were proposed to reduce the effect of RF. In order to minimize the effect of RF, resources in the network are dynamically redistributed on different paths to make them available in contiguous blocks. Extra protocol messages are introduced to facilitate resource redistribution in the network. The Dynamic Resource Redistribution (DRR) algorithm when used in conjunction with RSVP, not only increased the number of calls accommodated into the network but also increased the overall resource utilization of the network. Issues such as how many resources need to be redistributed and of which call(s), and how these choices affect the redistribution process were investigated. Further, various simulation experiments were conducted to study the performance of the DRR algorithm on different network topologies with varying traffic characteristics.
Date:
December 2001
Creator:
Iyengar Prasanna, Venkatesan
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Meso-scale controlled motion for a microfluidic drop ejector.
The objective of this LDRD was to develop a uniquely capable, novel droplet solution based manufacturing system built around a new MEMS drop ejector. The development all the working subsystems required was completed, leaving the integration of these subsystems into a working prototype still left to accomplish. This LDRD report will focus on the three main subsystems: (1) MEMS drop ejector--the MEMS ''sideshooter'' effectively ejected 0.25 pl drops at 10 m/s, (2) packaging--a compact ejector package based on a modified EMDIP (Electro-Microfluidic Dual In-line Package--SAND2002-1941) was fabricated, and (3) a vision/stage system allowing precise ejector package positioning in 3 dimensions above a target was developed.
Date:
December 1, 2004
Creator:
Galambos, Paul C.; Givler, Richard C.; Pohl, Kenneth Roy; Czaplewski, David A.; Luck, David L.; Braithwaite, Mark J. et al.
Object Type:
Report
System:
The UNT Digital Library
Pressure Controlled Topochemical Polymerization in Two-Dimensional Hybrid Perovskite
Mechanical pressure offers unique control over the energy landscape of chemical reactions, opening up pathways that are inaccessible through conventional thermochemistry. We hypothesize that the reduced dimensionality defines the conformational space of the high-pressure reaction, giving rise to new selectivity that is unavailable in 3D systems. Here, we demonstrate this concept through the pressure-controlled topochemical polymerization of the diacetylene molecule deca‐3,5‐diyn‐1‐amine (DDA) incorporated in the two-dimensional (2D) perovskite [DDA]2PbBr4. Compression at 3 GPa drives the first topochemical polymerization through 1,2 addition, forming a polyene product at room temperature. The reaction is initiated by the mechanical bending of the linear DDA molecule, a mechanism fundamentally different from the 1,4-addition in 3D solids. Importantly, pressure hinders the second 1,2-addition by disfavoring the gauche conformation between the remaining acetylene groups, allowing for the selective formation of polyene versus polyacene products. We characterize the reaction mechanisms and products using spectroscopies (Raman, X-ray photoelectron, ultraviolet-visible), X-ray diffraction and density-functional theory simulations. These results highlight the important role of dimensionality in high-pressure chemistry, and offers a new paradigm for creating low-dimensional functional materials.
Date:
December 2021
Creator:
Abu-Amara, Lama Marwan
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
A PROPOSAL FOR THE CONTROLLED RELEASE OF STORED ENERGY IN THE MTR REFLECTOR GRAPHITE
A study of the stored energy buildup in the MTR reflector graphite and a program of controlled energy release is presented. Calculations, based on measurements of samples from the pebble zone show that an inadvertent spontaneous stored energy release would cause a temperature rise of 90 deg F in the pebble zone. The maximum transient structure temperatures resulting from a worst credible accidental release of energy would be less than allowable at present (except for possible damage to neutron detector chambers) but could exceed this value in five years. It is proposed that the stored energy be released by thermal annealing. The reflector graphite is heated by reducing the air flow and operating the reactor at low power until a temperature of 500 deg F is reached, at which point the reactor is scrammed. Normal cooling is provlded after 15 minutes at peak anneal temperature or if the temperature rises to 600 deg F. Health physics monitoring includes continuous measurement of particulate and of Ci/sup 4/ activity. Sustained oxidatlon, if it occurs, wlll be detected with a C0/sub 2/ monitor and controlled by smothering. An estimated 2 or 3 days of MTR operating time will be needed of which the …
Date:
December 9, 1959
Creator:
Fast, E.; Smith, E.O. & Ford, J.D.
Object Type:
Report
System:
The UNT Digital Library
Pediatric Feeding Disorders: A Controlled Comparison of Multidisciplinary Inpatient and Outpatient Treatment of Gastrostomy Tube Dependent Children
The efficacy of multidisciplinary inpatient and outpatient treatment for transitioning children with severe pediatric feeding disorders from gastrostomy tube dependency to oral nutrition was investigated utilizing caloric and fluid intakes as an outcome measure. The study involved 29 children ages 12 months to 5 years of age with gastrostomy tube dependency. Treatments were provided by speech therapists, occupational therapist, dietician and psychologist for a 30 day period. Four treatment groups were evaluated and average intakes compared at 4 observation periods including pretreatment, initiation of treatment, completion of treatment at 30 days and 4 month follow-up. Children receiving inpatient treatment for feeding disorders evidenced significant differences in oral caloric intake from pretreatment to discharge than outpatient treatment (p < .01) and wait list control group (p = .04). Oral caloric intake from discharge to 4 month follow up yielded no significant differences indicating treatment gains were maintained. Change in environment and caretaker showed a significant effect for the inpatient group (d = 1.89). Effects of treatment by age and weight at 4 month follow up were also analyzed.
Date:
December 2010
Creator:
Cornwell, Sonya L.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Computer-controlled neutron time-of-flight spectrometer. Part II
A time-of-flight spectrometer for neutron inelastic scattering research has been interfaced to a PDP-15/30 computer. The computer is used for experimental data acquisition and analysis and for apparatus control. This report was prepared to summarize the functions of the computer and to act as a users' guide to the software system.
Date:
December 1, 1979
Creator:
Merriman, S.H.
Object Type:
Report
System:
The UNT Digital Library
The Feasibility of Casting Aluminum Relief Sculptures with Controlled, Diversified Textual Properties
The problem of this study is twofold: casting aluminum relief sculptures which have controlled diversified textural properties, and the development of a technical teaching process in the form of a pictorial documentation.
Date:
December 1973
Creator:
Williams, Glenn Bill
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Network congestion can be controlled: Routing algorithms in optical networks and Ethernets
Congestion and contention can greatly reduce the effective performance of an interconnection network. This report gathers together research done under a Laboratory Research and Development Program (LDRD) project at Sandia National Laboratories. The goal of the project was to explore the contention properties of novel optical interconnects. In the process of exploring optical interconnects the project also gained new insights into the use of backoff protocols in the current dominant interconnect technology, Ethernet.
Date:
December 1, 1997
Creator:
Goldberg, L.A.; MacKenzie, P.D. & Greenberg, D.S.
Object Type:
Report
System:
The UNT Digital Library
Mass transfer controlled reactions in packed beds at low Reynolds numbers
The a priori prediction and correlation of mass-transfer rates in transport limited, packed-bed reactors at low Reynolds numbers is examined. The solutions to the governing equations for a flow-through porous electrode reactor indicate that these devices must operate at a low space velocity to suppress a large ohmic potential drop. Packed-bed data for the mass-transfer rate at such low Reynolds numbers were examined and found to be sparse, especially in liquid systems. Prior models to simulate the solid-void structure in a bed are reviewed. Here the bed was envisioned as an array of sinusoidal periodically constricted tubes (PCT). Use of this model has not appeared in the literature. The velocity field in such a tube should be a good approximation to the converging-diverging character of the velocity field in an actual bed. The creeping flow velocity profiles were calculated. These results were used in the convective-diffusion equation to find mass transfer rates at high Peclet number for both deep and shallow beds, for low Peclet numbers in a deep bed. All calculations assumed that the reactant concentration at the tube surface is zero. Mass-transfer data were experimentally taken in a transport controlled, flow-through porous electrode to test the theoretical calculations …
Date:
December 1, 1978
Creator:
Fedkiw, P.S.
Object Type:
Report
System:
The UNT Digital Library
North Korea: Terrorism List Removal?
None
Date:
December 11, 2007
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
A Study to Develop a Curriculum Guide for Use in Teaching Numerically Controlled Drafting Courses
The problem with which this study is concerned is that of developing a curriculum guide educators can use in planning and organizing a course of study involving computer drafting at the junior college and technical vocational school levels. This study is also concerned with the impact of computer drafting on the present drafting curriculum.
Date:
December 1970
Creator:
Driskell, Hollis E.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Remotely Controlled Magneto-Phononic Devices Achieving Nonreciprocity and Anderson Localization in Ferrofluid
Motivated by previous relevant research on phononics including both active and passive phononics, the interest of faster turnability and more functions of the active phononics of further study led to this proposing research topic: magnetic field tunable active functional phononics. The first design of magnetic field tunable reciprocal--non-reciprocal transmission acoustic device was established, material was characterized, and numerical simulation has been performed. The simulation results show clear T-symmetric breaking non-reciprocity due to energy level splitting effect with Doppler effect – an acoustic Zeeman effect. Inspired by this preliminary work, further experiments were planned to demonstrate this effective Zeeman effect in phononics and effectively charged phonons in water based ferro-fluid. The objectives of this work as the next series of tasks were to illustrate acoustic Zeeman effect and acoustic Landau levels in various strength of magnetic field to investigate a design non-reciprocal sound device with magnetic field switching, which could be controlled on the amount of non-reciprocity with the strength of magnetic field. Once this new field first discovered by the proposed study tasks, more active tunable magnetic field phononics devices could be designed and exemplified in terms of both simulations and experiments. Faster and more controllable active phononic devices could …
Date:
December 2021
Creator:
Jin, Yuqi
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Summary of Previous Chamber or Controlled Anthrax Studies and Recommendations for Possible Additional Studies
This report and an associated Excel file(a) summarizes the investigations and results of previous chamber and controlled studies(b) to characterize the performance of methods for collecting, storing and/or transporting, extracting, and analyzing samples from surfaces contaminated by Bacillus anthracis (BA) or related simulants. This report and the Excel are the joint work of the Pacific Northwest National Laboratory (PNNL) and the National Institute of Standards and Technology (NIST) for the Department of Homeland Security, Science and Technology Directorate. The report was originally released as PNNL-SA-69338, Rev. 0 in November 2009 with limited distribution, but was subsequently cleared for release with unlimited distribution in this Rev. 1. Only minor changes were made to Rev. 0 to yield Rev. 1. A more substantial update (including summarizing data from other studies and more condensed summary tables of data) is underway
Date:
December 29, 2010
Creator:
Piepel, Gregory F.; Amidan, Brett G. & Morrow, Jayne B.
Object Type:
Report
System:
The UNT Digital Library
Utilization of SRS pond ash in controlled low strength material. Technical report
Design mixes for Controlled Low Strength Material (CLSM) were developed which incorporate pond ashes (fly ashes) from the A-Area Ash Pile, the old F-Area Ash Basin and the D-Area Ash Basin. CLSM is a pumpable, flowable, excavatable backfill used in a variety of construction applications at SRS. Results indicate that CLSM which meets all of the SRS design specifications for backfill, can be made with the A-, D-, and F-Area pond ashes. Formulations for the design mixes are provided in this report. Use of the pond ashes may result in a cost savings for CLSM used at SRS and will utilize a by-product waste material, thereby decreasing the amount of material requiring disposal.
Date:
December 1, 1995
Creator:
Langton, C. A. & Rajendran, N.
Object Type:
Report
System:
The UNT Digital Library
Final Technical Report: Controlled Hydrogen Fleet and Infrastructure Demonstration and Validation Project
This report summarizes the work conducted under U.S. Department of Energy (DOE) under contract DE-FC36-04GO14285 by Mercedes-Benz & Research Development, North America (MBRDNA), Chrysler, Daimler, Mercedes Benz USA (MBUSA), BP, DTE Energy and NextEnergy to validate fuel cell technologies for infrastructure, transportation as well as assess technology and commercial readiness for the market. The Mercedes Team, together with its partners, tested the technology by operating and fueling hydrogen fuel cell vehicles under real world conditions in varying climate, terrain and driving conditions. Vehicle and infrastructure data was collected to monitor the progress toward the hydrogen vehicle and infrastructure performance targets of $2.00 to 3.00/gge hydrogen production cost and 2,000-hour fuel cell durability. Finally, to prepare the public for a hydrogen economy, outreach activities were designed to promote awareness and acceptance of hydrogen technology. DTE, BP and NextEnergy established hydrogen filling stations using multiple technologies for on-site hydrogen generation, storage and dispensing. DTE established a hydrogen station in Southfield, Michigan while NextEnergy and BP worked together to construct one hydrogen station in Detroit. BP constructed another fueling station in Burbank, California and provided a full-time hydrogen trailer at San Francisco, California and a hydrogen station located at Los Angeles International Airport …
Date:
December 31, 2011
Creator:
Grasman, Ronald
Object Type:
Report
System:
The UNT Digital Library
LASL Controlled Thermonuclear Research program. Progress report, January--December 1975
Separate abstracts were prepared for each of the 13 included sections. (MOW)
Date:
December 1, 1976
Creator:
Sawyer, G. A. (comp.)
Object Type:
Report
System:
The UNT Digital Library
Geothermal publications list for Geopowering the West States
A list of geothermal publications is provided for each of the states under the ''GeoPowering the West'' program. They are provided to assist the various states in developing their geothermal resources for direct-use and electric power applications. Each state publication list includes the following: (1) General papers on various direct-uses and electric power generation available from the Geo-Heat Center either by mail or on-line at: http://geoheat.oit.edu. (2) General Geo-Heat Center Quarterly Bulletin articles related to various geothermal uses--also available either by mail or on-line; (3) Publications from other web sites such as: Geothermal-Biz.com; NREL, EGI, GEO and others ; and (4) Geothermal Resources Council citations, which are available from their web site: www.geothermal.org.
Date:
December 1, 2004
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Mass Spectrometry Guided Development of a Controlled Release Nanotransfersome Transdermal Drug Delivery System
Poor medical adherence attributed to patient compliance has impacted the medical community, at times, in a deleterious fashion. To combat this, the medical community has attempted to provide therapeutics in the form of absorption enhancing techniques. To improve the absorption rate techniques such as drug encapsulation using proteins, liposomes, or nanotransfersomes have been developed using mass spectrometry. These techniques, have aided in the enhanced absorption of analytes with low bioavailability, including curcumin, simvastatin, and lysozyme. Specifically, mass spectrometry allows for the development and monitoring of nanotransfersome encapsulated analytes and the permeation across the dermal membrane. This transdermal delivery would eliminate the problems encountered during first pass metabolism, while allowing for higher concentrations of analyte to be maintained in the blood serum. This can be coupled to a thermosensitive gelatin that provides for a dose control mechanism to be accomplished, allowing multiple doses to be delivered using one transdermal patch system. The novel delivery system developed using mass spectrometry, allows the analyte to be delivered into the circulatory system at a controlled dosage, via transdermal absorption. This system will aid in eliminating problems associated with patient compliance, as the patient is no longer reliant on memory to self-dose. Further, this system …
Date:
December 2020
Creator:
Kiselak, Thomas Dieter
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Environmental assessment for the offsite commercial cleaning of controlled and routine laundry from the Savannah River Site
This Environmental Assessment (EA) has been prepared by the U. S. Department of Energy (DOE) to assess the potential environmental impacts associated with the offsite commercial cleaning of controlled and routine laundry from the Savannah River Site (SRS) near Aiken, South Carolina. Controlled laundry consists of protective clothing and respirator equipment potentially containing radioactive contamination resulting from activities at SRS facilities. Routine laundry includes uncontaminated protective clothing. The aging onsite SRS laundry facility does not comply with current low hazard nuclear facility standards in DOE Order 6430.1. Constructing a new facility on site or upgrading the existing facility have prohibitive costs. The option to seek a commercial offsite vendor was selected as a viable alternative.
Date:
December 1, 1994
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library