I am by now bored of self improvement.
Dawud is not.
Here is his strategy for improving his Ramadan learning.
I am by now bored of self improvement.
Dawud is not.
Here is his strategy for improving his Ramadan learning.
Becker-Becker-Schwarz say in the discussion of references to their chapter on flux compactifications:
Flux compactifications were introduced in Strominger (1986) and De Wit,
Smith and Hari Dass (1987) as a generalization of conventional Calabi–Yau
compactifications. Such compactifications include a warp factor, so that the
ten-dimensional metric is no longer a direct product of the external and in-
ternal space-time. No-go theorems implied that in most cases such theories
reduce to ordinary Calabi–Yau compactifications. However, with the devel-
opment of nonperturbative string theory and M-theory, it became evident
that the no-go theorems could be circumvented. Flux compactifications were
first studied in the context of M-theory in Becker and Becker (1996) and in
the context of F-theory in Dasgupta, Rajesh and Sethi (1999). Giddings,
Kachru and Polchinski (2002) explained how flux compactifications can give
a large hierarchy of scales. Grana ̃ (2006) reviews flux compactifications.
I have said a few words about Strominger (1986) earlier. Next I intend to take up De Wit, Smith and Hari Dass (1987).
A.Strominger, Superstrings with Torsion, Nucl.Phys. B274(1986)253
According to Becker-Becker-Schwarz above is one of the two papers that introduced flux compactifications.
In this note I would like to extract the relevant information from the original paper to this effect.
The beginning statement of their abstract is following.
"The conditions for spacetime supersymmetry of the heterotic superstring
in backgrounds with arbitrary metric, torsion, Yang-Mills and dilaton
expectation values are determined using the sigma model approach"
This tells a lot about their task. Then there is the next info: "The equations are shown to agree to leading order in perturbation theory with those derived in a field theory approach, provided one considers a more general ansatz than in previous analyses by allowing for a warp factor".
" Exact solutions with non-zero torsion are found, indicating a new class of finite sigma models".
"Brief comments are made on the implications for phenomenology".
The contents of the paper are as follows: 1. Introduction, 2. Supersymmetry in the Field Theory Approach, 3. Spacetime Supersymmetry in Sigma Model Approach, 4. Solutions, 4.1 Exact Solutions, 4.2 Orbifolds, 4.3 Perturbative Solutions, 4.4 Non-Kahler Manifolds and Flat Directions, 4.5 Discussion, 5. Conclusions
Which part and in what way is the introduction of flux compactifications is something that I shall point out later on.
This chimes with the spirit of the age after Mr. Erdogan framed the constitutional referendum in April as a struggle against enemies of the Turkish nation and domestic traitors.
The first season featured a Turkish campaign against Crusaders in Anatolia, the second season battles against the Mongols, the third season war with the Christian Byzantines.Not only the political temperature but national mood is captured by the shows.
It is difficult to change this presentation but one thing is sure that here the negotiating party is not being given the same legitimacy that is expected for open attitude talks.
What happened to previous Taliban hostages?
Afghanistan announces Taliban prisoner swap to free hostages12 November 2019
Jalaluddin Haqqani, founder of Afghan militant network, dies4 September 2018
Why is there a war in Afghanistan? The short, medium and long story8 September 2019
Trump cancels secret US meeting with Afghan Taliban8 September 2019
Afghanistan war: Taliban tell Trump their 'doors are open'18 September 2019
Afghanistan Taliban commanders freed 'in swap for Indian hostages'7 October 2019
Afghanistan war: What could peace look like?14 July 2019
"I don't hate them at all," he said. "And some of them I have great respect for, and great love for, almost. Some of them were so compassionate and such lovely, lovely people. And it really led me to think about... how did they end up like this?"Yet the BBC presentation on this news and the related items is completely different. The headline of the above report itself is:
It is not as positive as the sentiments expressed in the earlier quote. Indeed any captivity can not be anything but an ordeal yet the mood of the headline does not match the sentiments of the captive about the Taliban.Timothy Weeks recalls Taliban hostage ordeal - 'I never gave up hope'...