672 research outputs found
MEREDITH HARRIS Viola MASTER'S RECITAL Wednesday, April 27, 2005 8:00 p.m. Lillian H. Duncan Recital Hall
No full textPlaylist: Suite in G Major, BWV1007 / Johann Sebastian Bach (1685-1750) -- Fantastic Variations on a Theme from "Tristan" / William Bergsma (1921-1994) -- Sonata No. I in F Minor, Op.120 / Johannes Brahms (1833-1897).This recital is given in partial fulfillment of the requirements for Master of Music degree
Op weg naar een nieuw cultuurpatroon : studie van de reactie op het moderne cultuurpatroon in de Dokkumer wouden
No full textBergsma made a sociological inquiry into the nature of the many rural changes and the factors promoting or retarding them. Rural culture in the Dokkumer Wouden did not change fragmentarily but the social changes formed a pattern. Multivariate analysis yielded a measure of the acceptance of the modern pattern of culture. On this basis important factors which influenced progressiveness, were age, farm size, the influence of local and religious groups, and the role of local leaders. The author examined the interrelations of these five factors
An Analysis of Selected Piano Solo Works Inspired by Biblical References: William Bergsma and Louis Weingarden
No full textabstract: Biblical references play an important role in traditional programmatic music. Composers such as Kuhnau, Haydn, Liszt, Messiaen, and Bolcom produced considerable amounts of piano repertoire with biblical allusions: Musical Presentations of Some Biblical Stories in 6 Sonatas (1700) by Kuhnau, The Seven Last Words from Our Saviour on the Cross (1787) by Haydn, The Way of Cross (1878-1879) by Liszt, Twenty Contemplations on the Infant Jesus (1944) by Messiaen, and The Garden of Eden: Four Rags for Piano (1969) by Bolcom. The twentieth century American composers William Bergsma and Louis Weingarden participated in this tradition by producing piano pieces that contain direct biblical quotations. These works, which have received little attention, include two movements from Tangents (1951) by Bergsma and Triptych: Three Pieces for Piano (1969) by Weingarden.
This paper provides a comprehensive analysis of these piano works, considering structural, rhythmic, harmonic, and melodic elements. In particular, the paper examines Bergsma and Weingarden’s work through the technique of word painting in order to illuminate the relationship between the biblical text and music. Key findings include that Bergsma’s Tangents contains dissonant harmonies and irregular rhythms to reflect the agony of people on the biblical Judgement day, while the use of tonality reflects God’s love in other parts. Similarly, Weingarden uses an illustrative style of word painting in Triptych to closely reflect this biblical narrative and scene through the combination of some twelve-tone techniques with chromaticism. These works present a high degree of pianistic and musical elaboration that incorporates twentieth-century compositional techniques, and this paper argues that they merit more attention for recitals by college-level and professional pianists. This paper begins with an introduction which provides the methodological approach used in the paper and a biography of each composer. It then progresses to an analysis of Bergsma’s Tangents, followed by an analysis of Weingarden’s Triptych.Dissertation/ThesisDoctoral Dissertation Music 201
Turbulence in shallow jet flows
No full textThe general flow pattern of an open channel flow, downstream of a width restriction by two artificial dams, is analysed. A physical Froude-scaled model, under hydraulic rough conditions, with a significant large Reynolds number is used to ensure turbulent flow. Upstream of the dams the flow is uniform in transverse direction, in between and downstream of the narrow part a jet is formed. On both sides of the jet large eddies are formed bounded by the wall, the jet and the dams. Due to the large velocity gradient in transverse direction a mixing layer develops at both sides of the jet. The width of the mixing layer, as expected, grows with the downstream distance and exceeds the water depth. 2D structures are clearly visible by injecting dye. In the mixing layer besides the macro time and spatial scales, the small Taylor and Kolmogorov scales are present. Whereas the macro scales are well represented in the measured data, the small scales are impossible to mark due to limitations of the Doppler device. When there is initial no net momentum in transverse direction present the jet is expected to appear symmetrical. However the jet is aligned to one of the sides every time the model starts to run. The preference for one or the other side seems to be random and cannot be related to momentum in transverse direction in between the dams. During measurements the position of the jet is stationary. The fixed position of the jet during measurements can be related to the Coand? effect. When the flow is disturbed and transverse momentum is added to the upstream flow, the jet can be deflected. The position of the jet and the evolving mixing layers can be related very well to the measured velocities upstream. Due to the limitations of the used momentum balance equation and use of the mean velocity in the bottom friction calculation the measured head loss is large compared to the calculated dissipative terms (bottom friction and Carnot loss).Additional ThesisEnvironmental Fluid MechanicsCivil Engineering and Geoscience
Research on the combination of translucent Glass Fiber Reinforced Polymers (G.F.R.P.) and Phase Change Materials (P.C.M.), for applications in architecture
No full textThis thesis is a scouting on the possibilities of combining P.C.M.s and G.F.R.P.s into one transparent element, which could upgrade the aesthetical values of a non-transparent P.C.M.-G.F.R.P. system. The contribution of this research is twofold, providing: 1) An analysis framework for further exploration on the combination of a P.C.M. and a G.F.R.P., in respect to their basic properties and focusing on their optical properties. The framework occurs from the qualitative and quantitative findings collected via literature study, calculations and experimentation. 2) A guideline and recommendations for synthesizing the above findings into design parameters and typologies for potential architectural applications.Facade DesignBuilding TechnologyArchitectur
COMPARISON OF FIELD CALCULATIONS AND MEASUREMENTS OF A SPECTROMETER MAGNET
No full textThe magnetic spectrometer of the CERN experiment NA48 uses a conventional dipole magnet with a gap of 2.40 m and a field integral of 0.83 Tm, equivalent to a transverse momentum change of charged particles of 250 MeV/c. This paper introduces the magnet and compares three-dimensional calculations of the magnetic field with the measured field map
Effect of selection for residual feed intake during the grow/finish phase of production on sow reproductive performance and lactation efficiency
No full textAs feed costs continue to rise and efficiency during finishing is emphasized, the impact of selecting for more efficient grow/finish pigs on reproductive performance and feed efficiency of sows must be evaluated. Therefore, the objectives of this study were to evaluate correlated responses for sow reproductive performance and lactation feed efficiency to selection for residual feed intake (RFI) during the grow/finish phase of production (RFIG/F) in 2 selection lines of pigs developed at Iowa State University (Ames, IA) and to estimate heritabilities of these traits. One line was selected over 7 generations for decreased RFIG/F (low RFI [LRFI] line) and the other line was randomly selected for 5 generations and then selected for increased RFIG/F (high RFI [HRFI] line). After 7 generations of selection, LRFI sows had 1.0 more piglets farrowed (P = 0.11) compared with HRFI sows, 1.3 more pigs born alive (P P P P P P P P = 0.47) than HRFI sows. Heritabilities for sow weights, sow body composition, sow maintenance requirements (estimated from BW), and piglet birth weight were high (h2 > 0.4, SE h2 G/F has favorably affected piglet performance and lactation efficiency but has unfavorably affected sow body condition loss and energy balance during lactation. These results indicate that pigs selected for increased efficiency during grow–finish are better able to direct resources where needed during other life history phases, that is, reproduction and lactation.This is a manuscript of an article published as Young, J. M., R. Bergsma, E. F. Knol, J. F. Patience, and J. C. M. Dekkers. "Effect of selection for residual feed intake during the grow/finish phase of production on sow reproductive performance and lactation efficiency." Journal of animal science 94, no. 10 (2016): 4120-4132. doi:10.2527/jas.2015-0130. Posted with permission.</p
Drawing behavior of UHMWPE films made from solution casting: Influence of solvent quality
No full textUltra-High Molecular Weight Polyethylene (UHMwPE) fibers are well known for their very high specific mechanical properties such as tensile strength and Young’s modulus. The solution spinning/solid state drawing process invented in the late 70s at DSM enables the production of these UHMwPE fibers with outstanding mechanical properties. The achievable maximum draw ratio of the UHMwPE fibers dictates their mechanical properties. One of the possible ways to improve this maximum draw ratio (λmax) is by decreasing the quality of the solvent used for its production. Modifying the solvent in the production of UHMwPE fibers might be a way to achieve higher properties. The focus of this project is mainly to study the influence of different solvents on the production of high strength UHMwPE films/fibers. Various ways were used to decrease the quality of the solvent to gel cast UHMwPE films and then the effect of this solvent quality on the drawing properties was determined. Subsequently, the molecular between the entanglements (Me) of polyethylene chains in different solvents was investigated using shear rheology. Morphological analysis (SEM, XRD) was performed to understand the topology, crystallinity, crystal thickness of the films made in different solvents. It was found that solvent quality has a significant effect on the maximum attainable draw ratio. SEM analysis was able to distinguish between drawable and undrawable UHMwPE films. However, from XRD analysis it was found that the crystal thickness is not the controlling factor for the improvement in drawability. The required difference Me of polyethylene chains in different solvents was found but it was within the experimental accuracy which made it difficult to conclude. Furthermore, preliminary study of some of the selected solvents on the production of UHMwPE fibers was performed. The drawing results proved that one to one translation from gel casting (films) to solution spinning (fibers) process is not straightforward. And also suggested that optimization of the drawing conditions of fibers can possibly lead to achieve expected maximum draw ratios.Aerospace EngineeringAerospace Structures and Material
Bonding Thermoplastic Polymers on Preconsolidated Thermoplastic Laminates by Additive Manufacturing
No full textBy 2050 Airbus has the ambition to fly an aircraft made mainly from additive manufactured parts. In order to reach this goal by 2050 different parts are being designed for additive manufacturing production processes. For example fuel engine nozzles, door hinges and seat belts. Fokker Aero Structures, Materialise NV and the faculty of Aerospace Engineering want to take a next step by developing a 3D spoiler demonstrator representing a group of aircraft spoilers, ailerons and flaps. The 3D spoiler demonstrator consists of a pre-consolidated CF laminate skin with an additive manufactured rear structure fitting in the wing of the aircraft. The rear structure is additive manufactured using the fused deposition modelling, abbreviated as FDM, technology and bonds to the pre-consolidated CF laminate skin by the principle of autohesion during additive manufacturing of the rear structure. Autohesion between the two polymers is dominated by pressure, temperature and time. Obtaining good shear strength at the interface, between the pre-consolidated CF laminate skin and the additive manufactured rear structure, is the first step in the design of the 3D spoiler demonstrator. By using an experimental additive manufacturing set-up the influence of the joint surface temperature, influenced by FDM working parameters, on the shear strength is investigated.Aerospace EngineeringAerospace Structures & MaterialsStructural Integrity & Composite
- …
