5,421 research outputs found
An Evening with George Shearing and Mel Torme (CD)
No full textBrian Torff is a contributing artist (bassist) and responsible for one composition (Manhattan hoedown) on this CD.
Recorded live at The Peacock Court, Hotel Mark Hopkins, San Francisco, California, April 15, 1982.https://digitalcommons.fairfield.edu/visualandperformingarts-music/1032/thumbnail.jp
Enhanced heterogeneous nucleation on oxides in Al alloys by intensive melt shearing
No full textThis thesis was submitted for the degree of Doctor of Philosophy and awarded by Brunel University.Aluminium alloys, including both foundry and wrought alloys, have been extensively used for light-weight structural and functional applications. A grain refined as-cast microstructure is generally highly desirable for either subsequent processing ability or mechanical properties of the finished components. In this thesis, the grain refined microstructures in Al alloys have been achieved by intensive melt shearing using the melt conditioning by advanced shearing technology (MCAST) without deliberate grain refiner additions. Such grain refinement has been attributed to the enhanced heterogeneous nucleation on the dispersed oxide particles. It has been established that the naturally occurring oxides in molten Al alloys normally have a good crystallographic match with the a-Al phase, indicating the high potency of oxide particles as the nucleation sites of the a-Al phase. The governing factors for these oxide particles to be effective grain refiners in Al alloys have been proposed, including the achievement of good wetting between oxide particles and liquid aluminium, a sufficient number density and uniform spatial distribution of the dispersed oxide particles, and near equilibrium kinetic conditions in liquid alloys. In the present study, near equilibrium kinetic conditions can be achieved by intensive melt shearing using a twin screw mechanism, which has been confirmed by the observed equilibrium a-AlFeSi phase in a cast Al alloy and the transformation from g- to a-Al2O3 at 740±20oC under intensive shearing. For different alloy systems, depending on the alloy system, and melting conditions, due to the particular types of oxide formed and its crystallographic and chemical characteristics, the nucleation site of the nucleated phase is different. Specifically, MgAl2O4 relative to MgO, and a-Al2O3 relative to g-Al2O3, have higher potency as heterogeneous nucleation sites of a-Al phase in Al alloys. In future, the modification of the crystallographic match, and of the other surface characteristics related to the interfacial energy between the specific oxides and nucleated phase by trace alloying addition through segregation to the interface between oxides and nucleated phases combined with physical melt processing (such as intensive shearing in the present study) should be investigated in more detail.This study was funded by the EPSRC and Norton Aluminium Limited, UK
Blues Alley Jazz (CD)
No full textBrian Torff is the bassist and responsible for one composition (High and Inside) on this CD.
Recorded in performance at Blues Alley, Washington, D.C., Oct. 1979 ; previously issued in 1980 on LP, CD released November 29, 1989)https://digitalcommons.fairfield.edu/visualandperformingarts-music/1030/thumbnail.jp
On a Clear Day (CD)
No full textBrian Torff is the bassist and responsible for two compositions (Brasil 79’, Blue Island Blues) on this CD.
Recorded live at Concord Pavillion, Concord, CA, August 1980.https://digitalcommons.fairfield.edu/visualandperformingarts-music/1026/thumbnail.jp
Modern Private Security: Its Growth and Implications
No full textOn the North American continent, in Europe and elsewhere, the dramatic growth in private security in the past several decades has reshaped the structure and function of modem policing. The development of private security has been facilitated by fundamental shifts in the nature of property relations. These changes have encouraged the development of a preventative mode of policing consistent with the principles and hopes of nineteenth-century police reformers, but they also suggest that we are moving in the direction of a new disciplinary society and raise fundamental questions with respect to sovereignty, justice, and individual liberty now almost entirely unrecognized. In particular, the legal institutions regarding private property operate to enhance the potential threat to individual liberty posed by the development of modem private security.No Full Tex
Union (CD)
No full textBrian Torff plays the bass on this CD.
Recorded in the Frank Lloyd Wright designed Union Church in Hinsdale, Illinois, this aptly titled disc features a reunion of three incandescent talents: Laurence Hobgood, regarded as one of the most powerful and accomplished young pianists in American jazz; bassist Brian Torff, who was once summoned with George Shearing to perform specially for President Reagan at the White House; and Paul Wertico - the Pat Metheny Group stalwart who was voted the accolade Fusion Drummer of the Year and has contributed a dozen Grammy nominated recording projects.
Total Length: 1:01:04https://digitalcommons.fairfield.edu/visualandperformingarts-music/1009/thumbnail.jp
Lullaby of Birdland: Blues Alley Jazz/On a Clear Day (CDs)
No full textBrian Torff is a contributing artist (bassist) and responsible for three composition (High and Inside, Brasil \u2779, Blue Island Blues) on this CD.
Total Time: Disc One 45:45 on 9 Tracks & Disc Two 47:38 on 9 Trackshttps://digitalcommons.fairfield.edu/visualandperformingarts-music/1014/thumbnail.jp
Reforming Police: Opportunities, Drivers and Challenges
No full textA few years ago, David Bayley and Clifford Shearing (1996) argued that at the end of the 20th century we were witnessing a 'watershed' in policing, when transformations were occurring in the practices and sponsorship of policing on a scale unprecedented since the developments that heralded the creation of the 'New Police' in the 19th century. In this special issue of the journal, we and our fellow contributors turn our attention to a somewhat neglected aspect of this 'quiet revolution' in policing (Stenning & Shearing, 1980), namely the nature of the opportunities for, and challenges posed by, the reform of policing in different parts of the world at the beginning of the 21st century. Our attention in this issue is particularly focused on the opportunities, drivers and challenges in reforming public (state-sponsored) police institutions.Full Tex
Preparation of Peppermint Oil/β-CD Inclusion by High-speed Shearing with Process Optimization Using ResponseSurface Methodology
No full textObjective: To investigate the optimal process for preparing peppermint essential oil/β-cyclodextrin (β-CD) inclusion complex using high-speed shearing combined with freeze-drying. Methods: The effects of freeze-drying and vacuum drying, high-speed shearing, and stirring on the encapsulation process were compared. Based on single-factor experiments, the ratio of β-CD to essential oil, encapsulation temperature, and mass fraction of β-CD were considered as influencing factors. The comprehensive score of oil content and encapsulation efficiency was used as an evaluation index to investigate the Box-Behnken response surface method for optimizing the encapsulation process. The content of pulegone in the inclusion complex was measured by high-performance liquid chromatography (HPLC). Fourier transform infrared spectroscopy (FTIR) was used to characterize the inclusion complex. Results: The yield of inclusion complex prepared by freeze-drying was higher, with an average yield of 97.6%. The oil content and encapsulation efficiency by the high-speed shearing method were relatively high, being about 3% and 19% higher than those by the stirring method, respectively. The optimized conditions were as follows: The weight ratio of β-CD to volatile oil was 9:1 (g/mL), the encapsulation temperature was 55 ℃, and the mass fraction of β-CD was 17%. Under these conditions, the essential oil content was 10.9%, the encapsulation efficiency was 97.6%, the comprehensive score was 99.7, the RSD value was 1.59%, and the optimized process was stable and feasible. The content of pulegone in the inclusion complex was found to be 2.465 mg/g by HPLC. The formation of the peppermint oil/β-CD inclusion complex was confirmed by analysis using FTIR. Conclusion: The combination of high-speed shearing and freeze-drying for the preparation of peppermint essential oil inclusion complex had the advantages of high efficiency, simple process, and it improved theyield, would provide guidance for the production process
Effect of confining pressure on particle breakage during shearing stage in consolidated drained (CD) triaxial tests on sand
No full textThe effect of confining pressure on particle breakage during the shearing stage of quartz sand has been studied in Consolidated Drained (CD) triaxial tests. Experimental investigations have been carried out on saturated sand specimens using standard triaxial apparatus. Two series of triaxial tests were done, firstly without unloading during the shearing stage and second, with unloading at 1% axial strain during the shearing stage. CD triaxial tests have been performed at high and low confining pressures i.e. 50, 100, 150, 200, 300 and 400 kPa. The specimen size is 50 mm in diameter and 100 mm in height and compacted to equal density. On each specimen, the particle size distribution test was carried out before and after the triaxial test was completed to check the number of broken particles. The results show that no definitive peak point was observed in the stress-strain relationship even after 20% axial strain and this is suspected due to particle breakage. As the confining pressure increased, it was found that the maximum deviator stress also increased. This study has shown that the particle breakage is very small. The increment in % finer material (<0.6 mm) ranged from 0.13% to 0.22%. It was found that the particle breakage increased with increasing the confining pressure. The particle breakage was very important in considering the sand's strength and volume change
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