3,031 research outputs found
Letter from Cy Donner to Michi Weglyn, June 2, 1967
No full textA letter from Cy Donner to Michi Weglyn encouraging her to come out to California to talk to producers about two shows called "Youthquake" and "Pretty Talk".These materials are from box 73 and 74 of the Frank Chin Papers. The Frank Chin Papers contain personal and professional correspondence between Frank Chin and Michi Weglyn relating to particular projects on which either author was working as well as files related to the Day of Remembrance Tribute to Michi Weglyn
THE DAMPING OF INTERPLANETARY ALFVENIC FLUCTUATIONS AND THE HEATING OF THE SOLAR-WIND
No full textAstronomy & AstrophysicsSCI(E)140ARTICLEA17-209
Outcome of medium-dose VP-16/CY/TBI superior to CY/TBI as a conditioning regimen for allogeneic stem cell transplantation in adult patients with acute lymphoblastic leukemia
Get PDFThe choice of conditioning regimen before allogeneic stem cell transplantation (SCT) in patients with acute lymphoblastic leukemia (ALL) is important. We retrospectively compared outcomes of medium-dose VP-16/cyclophosphamide/total body irradiation (VP/CY/TBI) regimen and CY/TBI. Five hundred and twenty-nine patients (VP/CY/TBI: n = 35, CY/TBI: n = 494) who met all of the following criteria were compared: first time for SCT, aged 15-59 years; first or second complete remission at SCT; bone marrow or peripheral blood as stem cell source; and HLA phenotypically matched donor. Median age of the patients was 34 years, and patients who received VP/CY/TBI were younger (28 years vs. 34 years, P = 0.02). Cumulative incidences of relapse and non-relapse mortality (NRM) were higher for patients who received CY/TBI (P = 0.01 for relapse, P < 0.01 for NRM). After a median follow-up period of 36.9 months, 5-year overall survival (OS) rates were 82.2% in the VP/CY/TBI group and 55.2% in the CY/TBI group. OS, and disease-free survival (DFS) in the VP/CY/TBI group were shown to be significantly better by multivariate analysis [hazard ratio: 0.21 (95% confidence interval: 0.06-0.49) for DFS, hazard ratio: 0.25 (95% confidence interval: 0.08-0.59) for OS]. VP/CY/TBI was associated with a lower relapse rate and no increase in NRM, resulting in better survival than that in CY/TBI for adult ALL patients
Two-fluid model for heating of the solar corona and acceleration of the solar wind by high-frequency Alfven waves
No full textA model of the solar corona and wind is developed which includes for the first time the heating and acceleration effects of high-frequency Alfven waves in the frequency range between 1 Hz and 1 kHz. The waves are assumed to be generated by the small-scale magnetic activity in the chromospheric network, The wave dissipation near the gyro-frequency, which decreases with increasing solar distance, leads to strong coronal heating. The resulting heating function is different from other artificial hearing functions used in previous model calculations. The associated thermal pressure-gradient force and wave pressure-gradient force together can accelerate the wind to high velocities, such as those observed by Helios and Ulysses. Classical Coulomb heat conduction is also considered and turns out to play a role in shaping the temperature profiles of the heated protons. The time-dependent two-fluid (electrons and protons) model equations and the time-dependent wave-spectrum equation are numerically integrated versus solar distance out to about 0.3 AU. The solutions finally converge and settle on time-stationary profiles which are discussed in detail. The model computations can be made to fit the observed density profiles of a polar coronal hole and polar plume with the sonic point occurring at 2.4 R. and 3.2 R., respectively. The solar wind speeds obtained at 63 R. are 740 km s(-1) and 540 km s(-1); the mass flux is 2.1 and 2.2 x 10(8) cm(-2) s (normalized to 1 AU), respectively. The proton temperature increases from a value of 4 x 10(5) K at the lower boundary to 2 x 10(6) K in the corona near 2 R..Astronomy & AstrophysicsSCI(E)0ARTICLE2363-39117
ON THE NATURE OF COMPRESSIVE FLUCTUATIONS IN THE SOLAR-WIND
No full textA statistical analysis of the amplitudes of the thermal pressure and total pressure of the solar wind and of several related cross correlations between different compressive parameters has been performed with the plasma and magnetic field data obtained by Hellos 1 and 2 in their primary missions. The statistical analysis is based on small-band averages of the relevant spectra over the frequency range (2-5) x 10(-4) Hz, corresponding to hourly timescales. The analysis shows that the theoretical values, given by the relation between the fluctuation of total pressure and density for perpendicular fast magnetoacoustic waves, present an upper limit for the observed amplitudes of the normalized total pressure fluctuations. With decreasing ratio between the fluctuation amplitudes of the total pressure and the density, we found a systematical decrease of the correlation coefficient between density and total pressure and of the correlation coefficient between density and magnetic field magnitude. Decreases of the correlation coefficients between temperature and density and between thermal and magnetic pressure are also found with decreasing ratio of the normalized amplitudes of the fluctuations of the thermal pressure and the temperature. For high-speed wind data the pattern of the data distribution in plots of one correlation coefficient versus the other correlation coefficient skews some systematical changes. Most of these results can be explained qualitatively by a model based on a superposition of small-amplitude perpendicular fast magnetosonic waves and small-amplitude pressure-balanced structures. We have found a class of data points which seem to represent fluctuations dominated by fast magnetosonic waves. In many cases in low-speed wind the correlations between density and total pressure and between temperature and density are both negative, while the correlation between temperature and magnetic magnitude is about zero. The nature of this phenomenon has not yet been clearified. Some possible explanations are suggested. The applicability and relevance of the nearly incompressible magnetohydrodynamics theory for the compressive fluctuations in the inner heliosphere are also discussed.http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:A1994PP43300027&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701Astronomy & AstrophysicsSCI(E)70ARTICLEA1121481-215099
A Recessive Lethal Gene, l-Cy, concealed in the Second Chromosome Balancer of Drosophila Melanogaster
Get PDFThe second chromosome balancer, SM 5[In(2(LR)SM 5)]Cy, has been used as a most useful tool to study the genetic variations in natural populations of Drosophila. melanogaster. The balancer suppresses recombination in almost whole region of the second chromosome since it has complicated inversions both in the right and left arms. It is lethal in the homozygous condition and it also has a dominant mutant, Cy, and several recessive mutations.Homozygous lethality has been explained by the presence of In(2 LR) or Cy itself. However, the cause of lethality is not necessarily clear. Recently, the author has found a recessive lethal gene in a natural population, which is allelic to these balancer chromosomes. In this short communication the author reports that the lethality of SM 5 chromosome in the homozygous condition is due to a recessive lethal gene, l-Cy (lethal Cy)
A Poetics of becoming: the mythography of Cy Twombly
No full textA Poetics of Becoming: The Mythography of Cy Twombly, centres upon Proteus, a painting made by the artist Cy Twombly in 1984. The chapter uses this particular work as a means of unpacking the artist's complex and manifold relationship with mythology. With regards to both the facture and the matiere of Proteus, the author argues that the visual poetics of the artist's work results from what is claimed to be the painting's "becoming
MHD structures, waves and turbulence in the solar wind: observations and theories
No full textA comprehensive overview is presented of recent observational and theoretical results on solar wind structures and fluctuations and magnetohydrodynamic waves and turbulence, with preference given to phenomena in the inner heliosphere. Emphasis is placed on the progress made in the past decade in the understanding of the nature and origin of especially small-scale, compressible and incompressible fluctuations. Turbulence models to describe the spatial transport and spectral transfer of the fluctuations in the inner heliosphere are discussed, and results from direct numerical simulations are dealt with. Intermittency of solar wind fluctuations and their statistical distributions are briefly investigated. Studies of the heating and acceleration effects of the turbulence on the background wind are critically surveyed. Finally, open questions concerning the origin, nature and evolution of the fluctuations are listed, and possible avenues and perspectives for future research are outlined.Astronomy & AstrophysicsSCI(E)503REVIEW1-21-2107
On cyclotron wave heating and acceleration of solar wind ions in the outer corona.
No full textThe preferential heating and acceleration of O+5 ions, as observed by Ultraviolet Coronagraph Spectrometer (UVCS) on Solar and Heliospheric Observatory (SOHO) [Kohl et al., 1998] in the solar coronal holes have been interpreted and modeled by invoking wave-particle cyclotron resonance [Cranmer et al., 1999a, 1999b], However, in the model of Cranmer et al. [1999a, 1999b] and in other subsequent models the assumption of a rigid slope of the wave spectrum was made in calculating the wave energy absortion by the different ion species. In the present paper it is shown that a self-consistent treatment of the wave damping and absorption is necessary and leads to substantially different results. On the basis of quasi-linear theory, the interaction between the ions and the ion-cyclotron waves [Marsch et al.: 1982a; Marsch, 1998] is studied. The total energy conservation equation, including the kinetic energy of the resonant particles and the wave energy, is derived and discussed in detail. The spectral evolution equation for cyclotron waves, when being controlled by the wave growth/damping rate and WI(B effects, is solved self-consistently together with the full set of anisotropic multifluid equations for the ions including the cyclotron-resonance wave heating and acceleration rates. From the numerical results we reach the following conclusions: (1) It is physically questionable to use a spectrum with a fixed spectral slope near the cyclotron resonance when one calculates the partition of wave energy among the different ionic species and the kinetic degrees of freedom parallel and perpendicular to the magnetic field. This assumption neglects the important effects of wave absorption and the concurrent reshaping of the wave spectrum, and thus leads in the dissipation domain to extremely low amplitudes of the waves and to difficulties in supplying enough energy to balance the wave absorption at the cyclotron resonances. (2) If the spectrum is allowed to evolve self-consistently and concurrently with the particles' heating and acceleration through wave absorption, such a high perpendicular temperature and corresponding large temperature anisotropy as observed by UVCS do not occur or cannot be maintained. We conclude that the UVCS oxygen ion observations have not yet been explained satisfactorily by the cyclotron-resonance theory.Astronomy & AstrophysicsSCI(E)98ARTICLEA58233-825210
CY Students: Economic Desparity in the Formation of Racial Identity
No full textSubmitted by Tim McDonough ([email protected]) on 2008-06-04T19:31:37Z
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ResearchProcess.doc: 60416 bytes, checksum: f98f8ef8abb0cbe4ec2582240eee44d0 (MD5)This project investigates whether racial identity within the Korean international student community is influenced by factors that had lead them to study in the United States. The aspect of racial identity being investigated focuses on individual’s perception of acceptance into various social networks on the University of Illinois campus. The author seeks to answer the following questions: How do people define their identity? How does appearance, nationality, ethnicity, and environment affect identity? Why do some CY students socialize only with the CY social networks while other CY students extend into main stream American social networks? How does economics factor into racial identity and does the “Push-Pull theory of migration” influence identity?Made available in DSpace on 2008-06-04T19:31:37Z (GMT). No. of bitstreams: 1
ResearchProcess.doc: 60416 bytes, checksum: f98f8ef8abb0cbe4ec2582240eee44d0 (MD5)
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