9,852 research outputs found
aE Journal 2015/2016: aE/INTECTURE innovating architecture
No full textThe graduation studio of Architectural Engineering focuses on the integration of (new) technology in architecture. For this purpose, the name aE/ INTECTURE® was devised, which will be developed further as a brand in the coming years. Students start with a technical fascination and translate this into an architectural concept, finally being able to implement this within the environment in a responsible way. ‘If technology is the answer, what is the question?‘ Under the guidance of a team of enthusiastic (guest) lecturers, students search for the dot on the horizon that is necessary for coming up with solutions that improve the quality of the built environment and make it more sustainable. In addition, either the ‘making‘ (make) or ‘the energy and material flow’ (flow) is used and applied as a basis in different contexts.Architectural Engineerin
Black violence and the politics of representation: selected readings in the twentieth century American novel
No full textPhDThis thesis argues that the representation of black violence in the twentieth
century American novel is shaped by two principal rhetorical strategies, which I term
denial and demonisation. Denial refers to modes of literary discourse which seek to refute
the possibility of black violence, or to circumscribe it as an exclusively intraracial
phenomenon. Demonisation denotes textual strategies which figure a racially determined
form of violence as a natural element of black character. These strategies may appear
antithetical, but they are rarely deployed in isolation. Rather, they appear in complex
combinations in most representations of black violence in American literature, as I
demonstrate using a range of novels by black and white authors which span the twentieth
century. These strategies have their roots in racist ideologies which seek to obliterate any
connection between the impact of racism upon African Americans and black violence.
Hence they are most noticeable in literary texts which reflect and contribute to racist
ideology. However, texts which seek to expose social and cultural causes of black
violence are also unavoidably influenced by these modes of literary discourse, and this
includes the work of African American authors. They have to negotiate the racist tropes
and assumptions encoded within the language and literary forms of hegemonic American
culture, because they have no alternative, completely separate resources for cultural
production. External pressures experienced by any author representing black violence
compound these difficulties. These include the demands of black community leaders and
white liberals not to represent African Americans in ways which may hinder the cause of
racial equality, and the demands of publishers to represent black violence in ways with
proven commercial potential. Furthermore, despite the retreat of racism in modern
America, certain images and fantasies of blackness retain a hold over the American
cultural imaginary, and continue to influence literary discourse. As my thesis
demonstrates, this ensures that denial and demonisation can still be detected in
contemporary American novels
On optical appearance of Einstein-Maxwell-{\AE}ther black holes surrounded by various accretions
No full textIn this paper, we investigate the effects of the {\ae}ther field and the
electric charge on the observed shadow of two types of charged black holes in
the Einstein-Maxwell-{\AE}ther theory. By considering that the
Einstein-Maxwell-{\AE}ther black holes surrounded by the static/infalling
spherical accretion flows, as well as an optically and geometrically thin disk
accretion flow, we study the shadow luminosities and the observed specific
intensity of the image for these various profiles of accretion flows. We find
that in the thin disk accretion model the location and the emitted model of the
accretion gas affect on the optical appearance of charged Einstein-{\AE}ther
black holes in contrast to the spherical accretion flows. For a thin disk
profile, we show that the observer will receive more intensity for an emitted
model as Gaussian function when the innermost radiation radius lies in the
innermost stable circular orbit. Finally, comparing the results of the charged
Einstein-{\AE}ther black holes with neutral Einstein-{\AE}ther black holes, we
show that the charged Einstein-{\AE}ther black holes have smaller dark area,
whereas wider lensed ring and photon ring. Comparing the charged
Einstein-{\AE}ther black holes with Reissner-Nordstrom black hole gives a
reverse effect.Comment: 21 pages, 13 figure
Context and Implications Document for: Future secondary schools for diversity: where are we now and were could we be?
No full textThis is the author accepted manuscript. The final version is available from Wiley via the DOI in this recordThe article which this guide accompanies is in ORE at: http://hdl.handle.net/10871/33928This guide accompanies the following article: Black, A., Future secondary schools for diversity: Where are we now and were could we be? Review of Education, https://doi.org/10.1002/rev3.312
Kerr Black Hole in Einstein--\AE{}ther Gravity
No full textWhile non-rotating black-hole solutions are well known in Einstein--\ae{}ther
gravity, no axisymmetric solutions endowed with Killing horizons have been so
far found outside of the slowly rotating limit. Here we show that the Kerr
spacetime is also an exact vacuum solution of Einstein--\ae{}ther gravity in a
phenomenologically viable corner of the parameter space; the corresponding
\ae{}ther flow is characterised by a vanishing expansion. Such solution
displays all the characteristic features of the Kerr metric (inner and outer
horizons, ergoregion, etc.) with the remarkable exception of the
causality-violating region in proximity of the ring singularity. However, due
to the associated \ae{}ther flow, it is endowed with a special surface, inside
the Killing horizon, which exhibits many features normally related to the
universal horizon of the non-rotating solutions -- to which it tends in the
limit of zero angular momentum. Hence, these Kerr black holes are very good
mimickers of their general relativity counterparts while sporting important
differences and specific structures. As such, they appear particularly
well-suited candidates for future phenomenological studies.Comment: 9 pages, 3 figures. (v2) Discussion on closed timelike curves
expanded, some minor changes and corrections, two references added, title
(slightly) changed; conclusions unchanged, matches published versio
Individual cross-reactivity IgG response between <i>Ae. albopictus</i> and <i>Ae. aegypti</i> SGE.
No full text<p>Correlations between IgG against <i>Ae. albopictus</i> SGE and <i>Ae. aegypti</i> SGE in Reunion Island (black circle) and Bolivia (white circle). The coefficient of correlation (r) and significance are indicated for each species SGE, black lines represent linear Spearman correlation.</p
Optical appearance of Einstein-{\AE}ther black hole surrounded by thin disk
No full textIn Einstein-{\AE}ther theory, the Lorentz symmetry is locally broken in the
high-energy regime due to the presence of the{\AE}ther field. This shall leave
significant imprint on astronomical observation. In this paper, we investigate
the optical appearance of two types of the static and spherically symmetric
black holes in Einstein-{\AE}ther theory. Via Euler-Lagrange equation, we
obtain the equations of motion of the photon and calculate the total deflection
angle of the photon trajectory around the black hole. By classifying the light
rays with the total number of orbits, we study the effects of coupling
constants on the direct image, lensing ring, and photon ring. The features of
the light trajectories are also investigated by comparing with the
Einstein-{\AE}ther theory and general relativity. Moreover, we also show the
explicit optical appearance of black holes surrounded by thin disk emissions
with three characteristic emitted models. The results indicate that the direct
image gives the main contribution to the total flux, and the lensing ring just
gives a very small contribution, whereas the role of the photon ring is
negligible. The optical appearances are also found to significantly rely on
these coupling constants.Comment: 19 pages, 6 figure
aE Journal 2017/2018: aE/Intecture innovating architecture
No full textDriven by the need to think differently about resources, energy, power generation, the choice of materials, and user involvement, we see the built environment in a new perspective. The program, Architectural Engineering, seeks for innovative and inspiring architectural solutions for social and environmental issues throughout all scales.To achieve this, innovation of the architectural challenge is high on our agenda. Innovation is more than just a technical improvement. How do you implement new current issues in modern architecture? We anticipate new energy, materials, and circularity. We also use the current environment of the metropolis and the countryside. We add new buildings, strengthen existing stock, and work on new components of buildings. From high to low tech. From digital to traditional, looking carefully to the context.Architectural Engineerin
Why Are There So Few Black Entrepreneurs?
No full textBlack entrepreneurship has been unsuccessful in the U.S. The fraction of employed blacks that work in their own businesses is about one-third that of whites. Other measures of success such as net income, number of employees, and form of organization show large differences between blacks and whites. This paper examines explanations for these differences, particularly focusing on the frequently cited economic explanations of liquidity constraints and consumer discrimination. Liquidity constraints are examined by estimating logit equations for who is self-employed in a cross-section and who becomes self-employed in a panel. These estimates suggest that net worth is not an important determinant of the racial differences in self-employment. An examination of small business starting capital indicates that little capital is needed to start most business and beginning entrepreneurs do not usually borrow. Examining the industrial distribution of black and white businesses, I do not find a greater relative representation of blacks in industries requiring less starting capital. I also examine if black businesses are relatively more common in industries where white customers more frequently patronize black businesses. Little support is found for this hypothesis. I conclude that cultural differences may explain black/white differences in self-employment, but this explanation requires further study.
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