42,405 research outputs found
Mariner Mars absorptivity standard
Mariner 4 space probe absorptivity standard used to measure solar absorptance of temperature control surface
Aerodynamic performance of 0.5 meter-diameter, 337 meter-per-second tip speed, 1.5 pressure-ratio, single-stage fan designed for low noise aircraft engines
Overall and blade-element aerodynamic performance of a 0.271-scale model of QF-1 are presented, examined, and then compared and evaluated with that from similar low noise fan stage designs. The tests cover a wide range of speeds and weight flows along with variations in stator setting angle and stator axial spacing from the rotor. At design speed with stator at design setting angle and a fixed distance between stage measuring stations, there were no significant effects of increasing the axial spacing between rotor stator from 1.0 to 3.5 rotor chords on stage overall pressure ratio, efficiency or stall margin
Evaluation of an automatic aerosol particle counter for measuring the airborne contamination level in a controlled environment
Automatic aerosol particle counter for measuring airborne contamination level in controlled environmen
Constraining the time variation of the coupling constants from cosmic microwave background: effect of \Lambda_{QCD}
We investigate constraints on the time variation of the fine structure
constant between the recombination epoch and the present epoch,
\Delta\alpha/\alpha \equiv (\alpha_{rec} - \alpha_{now})/\alpha_{now}, from
cosmic microwave background (CMB) taking into account simultaneous variation of
other physical constants, namely the electron mass m_{e} and the proton mass
m_{p}. In other words, we consider the variation of Yukawa coupling and the QCD
scale \Lambda_{QCD} in addition to the electromagnetic coupling. We clarify
which parameters can be determined from CMB temperature anisotropy in terms of
singular value decomposition. Assuming a relation among variations of coupling
constants governed by a single scalar field (the dilaton), the 95% confidence
level (C.L.) constraint on \Delta\alpha/\alpha is found to be -8.28 \times
10^{-3} < \Delta\alpha/\alpha < 1.81 \times 10^{-3}, which is tighter than the
one obtained by considering only the change of \alpha and m_{e}. We also obtain
the constraint on the time variation of the proton-to-electron mass ratio \mu
\equiv m_{p}/m_{e} to be -0.52 < \Delta\mu/\mu < 0.17 (95% C.L.) under the same
assumption. Finally, we also implement a forecast for constraints from the
PLANCK survey.Comment: 25 pages, 4 figures; references adde
Lifestyling Asia? Shaping modernity and selfhood on life advice programming
This article discusses the early findings of a research project examining the role of lifestyle television in Asia. Life-advice programming in East Asia includes a range of 'popular factual' formats from cooking and health shows to makeover and consumer advice shows. A growing body of AngloAmerican scholarship emphasizes the cultural importance of lifestyle programming, suggesting that the explosion of lifestyle formats at this particular cultural-historical moment connects to broader transformations in western neoliberal states, especially the rise of individualized, consumer-based models of identity and citizenship. Focusing on Singapore, China and Taiwan, this article offers a discussion of the potential of such arguments in these contexts, in light of our findings about the forms of life-advice programming prevalent in these three television industries. In particular, it explores the relevance (or not) of Anglo-American theories of neoliberal selfhood in these sites as read through the lens of lifestyle television
The Role of Mentors/Advisors in the Doctoral Training of African American Students at Predominately White Universities: Implications for Doctoral Training
The purpose of this study is to examine the relationship and the importance of connecting the African American doctoral students and their advisors in the mentor roles. More specifically, this study brings to the forefront the importance as well as the impact of mentors/advisors and their roles in facilitating academic success for African American doctoral students. Many African American doctoral students are typically misunderstood and misdirected in the types of support that they may need to succeed in graduate school (Gallien & Peterson, 2005). Mentors/advisors and the roles that they have are essential to the success of African American doctoral students. The support structures surrounding the mentor/advisor relationship in this research are essential to how it relates to the needs of the African American doctoral student on a predominately White campus. Given the findings, recommendations are provided for future research and for administrators at predominately White Institutions
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