35,472 research outputs found
Dig for the digger [music] /
No full textFor voice and piano.; Caption title.; "Dedicated to the Women's Peace Loan Committee by the author, John K. Wells"--Cover.; Also available online http://nla.gov.au/nla.mus-vn3291520
Michael K. Wells' Graduate Performances
No full textOriginal Format: CassetteComposers in the graduate recital: Sergei Rachmaninoff; Clifton Williams; Morton Gould; Robert KurkaRecital: Conducto
Application of abandoned wells integrated with renewables
No full textThe large thermal potentials with geothermal gradient of abandoned wells provide the possibility and opportunity for carbon-neutrality transition of district heating systems, whereas energy harvesting from abandoned geothermal wells is full of challenges, due to the considerable initial investment in economic cost, system performance degradation, and so on. In this chapter, a systematic and comprehensive review on the application techniques of abandoned wells is presented, in terms of advanced thermal/power conversions, renewable integrations for district heating, and strategies for performance enhancement. Discussions on real applications have been conducted and future prospects presented, from perspectives of lifetime system performance, techno-economic feasibility analysis, and potential assessment of abandoned wells for carbon-neutrality transition. The results of this chapter can provide preliminary knowledge and cutting-edge technologies on renewable integrations with abandoned wells, so as to demonstrate techno-economic-environmental potentials of abandoned wells and contributions toward carbon-neutrality transition.Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Design & Construction Managemen
Professor Wells: the Educational Purposes of H.G. Wells’ Works
No full textreservedThis dissertation analyses the educational purposes of H.G. Wells’ works. Wells is
known as one of the fathers of science fiction, and as one of the most influential writers of the late
nineteenth century. However, I will not focus on H.G. Wells as an author. I will focus on H.G. Wells
as a teacher. Education played a key role in the life of this remarkable author. He not only spent some
of his early years working as a teacher, but he also wrote a textbook meant for biology students.
Furthermore, in the later stages of his life Wells actively advocated for the need to reform the British
school system, introducing scientific subjects in the school curricula. He also dedicated himself to
writing popularizing articles about scientific topic. The strong connection between Herbert George
Wells and education is, to me, quite evident. Every chapter of this work will focus on a different work
written by Wells. I chose to follow on some of his most famous works: The Island of Doctor Moreau
(1896), The Time Machine (1895), and The World of the Worlds (1898). Here, I will analyse the
content of each work, trying to point out the educational narrative proposed by Wells. I am not
proposing anything new as far as the interpretation of these works is concerned. In order to carry out
my researches for the dissertation, I attentively read many essays and articles that proposed an
interpretation of Wells’ texts. Among the authors I refer to, there are authoritative Wells’ scholars
such as Patrick Parrinder. The purpose of the work is not providing a new interpretation of the themes
and motifs behind H.G. Wells’ works, but demonstrating that these books had been written in order
to teach something to their reading public.
The last chapter focuses on Wells’ utopian novel A Modern Utopia (1905). It is different from
the others because I will not limit myself to describing the educational purposes of the book. A
Modern Utopia is a programmatic text, and this gave me the possibility to have a closer look at Wells’
beliefs and plans for society. As I propose in the fifth chapter, some of his views would be considered
completely unacceptable by modern-day readers. I focus on two specific topics. First, I will take into
exam the treatment received by criminals, feeble-minded, drunkards, and other sorts of people
considered “undesirable” by the Victorians. And then I focus on the role of the woman in the utopian
state imagined by Wells. As I will discuss, Wells’ ideas were far from progressive as far as these
topics were concerned. Or, at least, they could not be considered progressive nowadays. The final
chapter is not a way to stigmatise Wells. Rather, it is a way to contextualise both the man and his
works. As I propose, contextualising Wells is the only way to truly appreciate the innovative
contributions of his works.This dissertation analyses the educational purposes of H.G. Wells’ works. Wells is
known as one of the fathers of science fiction, and as one of the most influential writers of the late
nineteenth century. However, I will not focus on H.G. Wells as an author. I will focus on H.G. Wells
as a teacher. Education played a key role in the life of this remarkable author. He not only spent some
of his early years working as a teacher, but he also wrote a textbook meant for biology students.
Furthermore, in the later stages of his life Wells actively advocated for the need to reform the British
school system, introducing scientific subjects in the school curricula. He also dedicated himself to
writing popularizing articles about scientific topic. The strong connection between Herbert George
Wells and education is, to me, quite evident. Every chapter of this work will focus on a different work
written by Wells. I chose to follow on some of his most famous works: The Island of Doctor Moreau
(1896), The Time Machine (1895), and The World of the Worlds (1898). Here, I will analyse the
content of each work, trying to point out the educational narrative proposed by Wells. I am not
proposing anything new as far as the interpretation of these works is concerned. In order to carry out
my researches for the dissertation, I attentively read many essays and articles that proposed an
interpretation of Wells’ texts. Among the authors I refer to, there are authoritative Wells’ scholars
such as Patrick Parrinder. The purpose of the work is not providing a new interpretation of the themes
and motifs behind H.G. Wells’ works, but demonstrating that these books had been written in order
to teach something to their reading public.
The last chapter focuses on Wells’ utopian novel A Modern Utopia (1905). It is different from
the others because I will not limit myself to describing the educational purposes of the book. A
Modern Utopia is a programmatic text, and this gave me the possibility to have a closer look at Wells’
beliefs and plans for society. As I propose in the fifth chapter, some of his views would be considered
completely unacceptable by modern-day readers. I focus on two specific topics. First, I will take into
exam the treatment received by criminals, feeble-minded, drunkards, and other sorts of people
considered “undesirable” by the Victorians. And then I focus on the role of the woman in the utopian
state imagined by Wells. As I will discuss, Wells’ ideas were far from progressive as far as these
topics were concerned. Or, at least, they could not be considered progressive nowadays. The final
chapter is not a way to stigmatise Wells. Rather, it is a way to contextualise both the man and his
works. As I propose, contextualising Wells is the only way to truly appreciate the innovative
contributions of his works
Wells futurologo
No full textUna lettura critica del saggio di H.G Wells "La scoperta del futuro" con cui l'autore di letteratura di fantascienza definisce i caratteri di una nuova disciplina che alcuni decenni più tardi si sarebbe chiamata Futurologia.A critical reading of the essay by H.G Wells "The discovery of the future" with which the author of science fiction literature defines the characteristics of a new discipline that a few decades later would be called Futurology
Spin relaxation and carrier recombination in GaInNAs multiple quantum wells
No full textElectron spin relaxation and carrier recombination were investigated in gallium indium nitride arsenide (GaInNAs) multiple quantum wells, using picosecond optical pulses. Pump-probe experiments were carried out at room temperature, using pulses produced by a Ti:sapphire pumped optical parametric oscillator.
The peak wavelengths of the excitonic resonances for the quantum well samples were
identified using linear absorption measurements, and were found to be in the range 1.25µm-1.29µm.
Carrier recombination times were measured for three samples of varying nitrogen content, and were observed to decrease from 548 to 180ps as nitrogen molar fractions were
increased in the range 0.45-1.24%. Carrier recombination times were also measured
for samples which had undergone a post-growth annealing process, and were found to be
signicantly shorter compared to times measured for as-grown samples.
Electron spin relaxation time was investigated for samples with quantum well widths in the range 5.8-8nm, and was found to increase with increasing well width, (i.e. decreasing quantum confinement energy), a trend predicted by both D'Yakonov-Kachorovskii and
Elliott-Yafet models of spin relaxation in quantum wells. In a further study, longer spin relaxation times were exhibited by samples containing higher molar fractions of nitrogen, but having nominally constant quantum well width. Spin relaxation times increased from 47ps to 115ps for samples containing nitrogen concentrations in the range 0.45-1.24%. Decreases in spin relaxation time were observed in the case of those samples which had been annealed post-growth, compared to as-grown samples.
Finally, all-optical polarisation switching based on spin relaxation of optically generated carriers in GaInNAs multiple quantum wells was demonstrated
Dr. Carter's K & B Tea
No full textTrade card/postcard advertising Dr. Carter's K & B Tea and other remedies prepared by S.C. Wells & Co., Leroy, N.Y
Nonlinear Rashba model and spin relaxation in quantum wells
No full textWe find that the Rashba spin splitting is intrinsically a nonlinear function of the momentum, and the linear Rashba model may overestimate it significantly, especially in narrow-gap semiconductors. A nonlinear Rashba model is proposed, which is in good agreement with the numerical results from the eight-band k center dot p theory. Using this model, we find pronounced suppression of the D'yakonov-Perel' spin relaxation rate at large electron densities, and a nonmonotonic dependence of the resonance peak position of the electron spin lifetime on the electron density in [111]-oriented quantum wells, both in qualitative disagreement with the predictions of the linear Rashba model
Slat aerodynamics and aeroacoustics with flow control
No full textThis study primarily investigated the flow and aeroacoustics associated with the slat of a three-element aerofoil in approach conditions. The study assessed importance of several factors and examined their aerodynamic impacts. The factors investigated were aerofoil incidence, slat angle, slat cusp geometry, fixing transition and blowing in the slat cove.
A combination of experimental and computational techniques investigated the factors selected. The experimental work employed PIV, pressure tap, a force balance, flush mounted microphones and an acoustic array. The computational work used DES along with the FW-H acoustic analogy to obtain the far-field directivity.
Tonal features occurred at high incidence and originated at the slat trailing edge, due to the blunt trailing edge and gap, and at the reattachment point. Fixing transition removes the tone at the reattachment point and reduces the slat gap tone at the trailing edge but does not remove the tone generated by the blunt trailing edge. All of the tones found, only occurred at certain slat and wing settings.
Broadband sound was present in all conditions but had a strong dependence on the incidence of the wing. The sound was loudest with the wing at ? = 5o with a reduction as the wing incidence was increased. The broadband sound also reduced as the slat angel decreased from ?S = 23o. The shear incidence angle was a good indicator of the impact of these two factors on the sound generated. Extending the slat cusp reduced the broadband sound at low aerofoil incidence. However, for ? ? 10o the extension led to increased broadband sound. Neither blowing nor fixing transition had a significant impact on the broadband sound generated by the slat system.
The aerodynamic loads generated by the wing were mainly dependent on the aerofoil incidence. However, other factors did influence the forces generated. Reducing the slat angle increased the lift generated by the wing especially at low aerofoil incidence but the lift to drag ratio was unaltered. At high aerofoil incidence, extending the slat cusp reduced the lift generated. Blowing and fixing transition did not significantly alter the forces generated by the wing
Rashba spin splitting in biased semiconductor quantum wells
No full textRashba spin splitting (RSS) in biased semiconductor quantum wells is investigated theoretically based on eight-band k center dot p theory. We find that at large wave vectors, RSS is both nonmonotonic and anisotropic as a function of in-plane wave vector, in contrast to the widely used isotropic linear model. We derive an analytical expression for RSS, which can qualitatively reproduce such nonmonotonic behavior at large wave vectors. We also investigate numerically the dependence of RSS on the various band parameters and find that RSS increases with decreasing band gap and subband index, increasing valence band offset, external electric field, and well width. All these dependences can be qualitatively described by our analytical model
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