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Showing 1 to 20 of 32 for “"DMAC"”.
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Verification of DMAC Device Driver Operations in HOL4
… such as stand-alone DMA Controllers (DMACs), to read and write memory without CPU intervention. However, DMA introduces security problems in which attackers are able to leak data and overwrite critical system components by bypassing typical operating system security mechanisms. This …
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Flexible machine tool control for direct, in-process dimensional part inspection
… The research in direct machining and control (DMAC) at BYU has identified a potential application of CMM technologies on existing machine tools. To prove that a machine tool can be controlled as a CMM with the DMAC controller, this research will integrate the software package PC-DMIS provided …
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A Geometry-Based Motion Planner for Direct Machining and Control
Direct Machining And Control (DMAC) is a new method of controlling machine tools directly from process planning software. A motion planning module is developed for the DMAC system that operates directly off path geometry without pre-tessellation. The motion planner is developed with the intent to …
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INVESTIGATING PAIR-RULE GENE ORTHOLOGS IN AN INTERMEDIATE GERM BEETLE, DERMESTES MACULATUS
… uncover defects with different severities. Both Dmac-prd and -slp knockdown resulted in typical PR defects, suggesting that they are “core” PR genes. Dmac-eve, -run and -odd have dual roles in germ band elongation and in PR segmentation, as severe knockdown caused anterior-only, asegmental …
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Electronic Multi-agency Collaboration. A Model for Sharing Children¿s Personal Information Among Organisations.
… introduces Dynamic Multi-Agency Collaboration (DMAC), a theoretical model of effective information sharing using a limited-life dataset. The limited life of the DMAC dataset gives more control to information providers, encouraging effective information sharing within the parameters of the Data …
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Cellulose-based fibers from liquid crystalline solutions
… different concentrations in dimethylacetamide (DMAc) and with different types of substituents were studied in relation to their liquid crystalline (LC) solution behavior. Classical LC behavior was revealed for all solutions. Critical polymer concentration (V<sub>p</sub><sup>c</sup>) is highest …
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Separation of various organic-organic and aqueous-organic solutions via pervaporation
… (DMF)-water, N,N-dimethylacetamide (DMAc)-water and N,N-dimethylsulfoxide (DMSO)-water are explored using a 25 um thick PDD-TFE membrane at various temperatures and feed compositions. Depending on the system, a wide range of separation factors ([alpha]_{ij}) are achieved. The highest …
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A Performance Comparison Of Clustering Algorithms In Ad Hocnetworks
… protocols: Dynamic Mobile Adaptive Clustering (DMAC), Highest-Degree and Lowest-ID algorithms, and Weighted Clustering Algorithm (WCA). Yet Another Extensible Simulation (YAES) was used as the simulator to carry out the simulations.
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Crystallization and melting behavior of an aromatic semicrystalline polyimide, LaRC CPI-2
… in different solvents, dimethylacetamide (DMAc) and m-cresol present with dramatically different melting, melt stability and crystallization properties. Though the chemical architecture and crystal lattice structure are the same, the powders synthesized in DMAc display dual melting …
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Discovery and dissemination of new knowledge in food science: Analytical methods for quantification of polyphenols and amino acids in fruits and the use of mobile phone-based instructional technology in food science education
… (L-P), 4-dimethylaminocinnamaldehyde (DMAC) and the bovine serum albumin (BSA) precipitation methods, was conducted using analytical method validation procedures. The F-C method was not specific to polyphenols, and the L-P method had the widest working range but lacked accuracy. The …
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Synthesis and characterization of polydimethylsiloxane-urea segmented copolymers
… techniques in the presence of cosolvents such as DMAC or NMP, only resulted in low molecular weight products due to the premature precipitation of the polymer. A polyurethane prepolymer formation study done in either DMAC or o-butyrolactone (BLO) at about 105°C, showed BLO to be the better …
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Novel cellulose esters
… other products. Novel cellulose solvent systems (DMAc/LiCl) introduced within the last twenty years have allowed the use of several esterification techniques that could not be used effectively in the past. The combination of the new cellulose solvent systems and esterification chemistry has …
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Synthesis and Characterization of New Aryl Phosphine Oxide and Ketone Containing Poly(arylene Sulfide Sulfone)s
… oxide, and 4,4'-difluorobenzophenone in DMAc in the presence of K2CO3 at 160°C. The new phosphine oxide containing PPSS copolymers were completely amorphous, showed improved solubility in common organic solvents and exhibited very high char yields in air at 750°C. Surface (XPS) analysis …
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Novel Carbazole Based Methacrylates, Acrylates, and Dimethacrylates to Produce High Refractive Index Polymers
… reaction to be completed within 40 minutes in DMAC at 90°C. Photo-DSC was used to determine the heat of polymerization (DHp) for the carbazole-phenoxy based methacrylate, which was found to be -39.4 kJ/mole. One and two dimensional 1H NMR was used to characterize the molecular structure of the …
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Hybride amphiphiler hyperverzweigter Polyglycerine mit Metallnanopartikeln und ihre katalytischen Eigenschaften
… wird zur Zeit kontrovers diskutiert. In DMAc lösliche Palladiumkolloide waren in der Heck-Reaktion aktiv. Durch eine Ultrafiltration der Kolloide vor der Heck-Reaktion zeigte sich, dass die Kolloide geringe Mengen katalytisch hochaktiver Palladiumspezies enthielten, die vom Kolloid …
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Structure-property relationships of novel cellulose esters
… and acetic acids were synthesized in homogeneous DMAc/LiCl solution. Degree of substitution (DS) was conveniently controlled via stoichiometry, and fully-substituted cellulose derivatives were produced with little depolymerization. Thermal analysis of the C₁₂ - C₁₄ waxy tri-esters revealed …
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Modeling and Synthesis of Linux DMA Device Drivers using HOL4
… Ethernet Controller, MPC 5200 SoC, and STM32 DMAC.
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The synthesis and development of novel, easily processable poly (n-isopropylacrylamide)-based hyrdogels.
… relatively polar comonomer dimethylacrylamide (DMAc), and non-polar comonomer glycedyl methacrylate (GMAc) which respectively increased and decreased the PTTNAG and lower-critical solution temperature (LCST) of the resulting gels. Crucially, it was found that the PTTNAG temperature can be …
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Dynamic Reconfigurable Machine Tool Controller
… based on the Direct Machining And Control (DMAC) research at Brigham Young University. A reconfigurable framework is proposed which will allow a machine tool to be controlled by a variety of applications and control laws. This Reconfigurable Mechanism for Application Control (RMAC) paradigm …
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