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Journal ArticleDOI

Phd by thesis

01 Apr 1988-Nature (Nature Publishing Group)-Vol. 332, Iss: 6166, pp 676-676
TL;DR: In this paper, a sedimentological core and petrographic characterisation of samples from eleven boreholes from the Lower Carboniferous of Bowland Basin (Northwest England) is presented.
Abstract: Deposits of clastic carbonate-dominated (calciclastic) sedimentary slope systems in the rock record have been identified mostly as linearly-consistent carbonate apron deposits, even though most ancient clastic carbonate slope deposits fit the submarine fan systems better. Calciclastic submarine fans are consequently rarely described and are poorly understood. Subsequently, very little is known especially in mud-dominated calciclastic submarine fan systems. Presented in this study are a sedimentological core and petrographic characterisation of samples from eleven boreholes from the Lower Carboniferous of Bowland Basin (Northwest England) that reveals a >250 m thick calciturbidite complex deposited in a calciclastic submarine fan setting. Seven facies are recognised from core and thin section characterisation and are grouped into three carbonate turbidite sequences. They include: 1) Calciturbidites, comprising mostly of highto low-density, wavy-laminated bioclast-rich facies; 2) low-density densite mudstones which are characterised by planar laminated and unlaminated muddominated facies; and 3) Calcidebrites which are muddy or hyper-concentrated debrisflow deposits occurring as poorly-sorted, chaotic, mud-supported floatstones. These

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Citations
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Journal ArticleDOI
TL;DR: In this paper, a simple effective model was employed to study the chiral dynamics of two flavors of quarks at finite temperature and density, and the phase diagram in the plane of temperature and baryon chemical potential as a function of the pion mass was determined.
Abstract: We employ a simple effective model to study the chiral dynamics of two flavors of quarks at finite temperature and density. In particular, we determine the phase diagram in the plane of temperature and baryon chemical potential as a function of the pion mass. An interesting phase structure occurs that results in zero, one, or two critical points depending on the value of the vacuum pion mass.

134 citations


Cites background from "Phd by thesis"

  • ...More details on the numerical solutions as well as results when the aforementioned parameters are varied will be presented elsewhere [21]....

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  • ...For more details on the mathematical derivations and numerical procedures see [21]....

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Journal ArticleDOI
TL;DR: In this paper, the authors analyzed various perspectives on the elliptic genus of non-compact supersymmetric coset conformal field theories with central charge larger than three and showed that the holomorphic part of the genus is directly related to an Appell-Lerch sum and behaves anomalously under modular transformations.
Abstract: We analyze various perspectives on the elliptic genus of non-compact supersymmetric coset conformal field theories with central charge larger than three We calculate the holomorphic part of the elliptic genus via a free field description of the model, and show that it agrees with algebraic expectations The holomorphic part of the elliptic genus is directly related to an Appell-Lerch sum and behaves anomalously under modular transformations We analyze the origin of the anomaly by calculating the elliptic genus through a path integral in a coset conformal field theory The path integral codes both the holomorphic part of the elliptic genus, and a non-holomorphic remainder that finds its origin in the continuous spectrum of the non-compact model The remainder term can be shown to agree with a function that mathematicians introduced to parameterize the difference between mock theta functions and Jacobi forms The holomorphic part of the elliptic genus thus has a path integral completion which renders it non-holomorphic and modular

134 citations


Cites background from "Phd by thesis"

  • ...Here we closely follow the presentation of [21] where the definition of the level l Appell-Lerch sums is taken to be:...

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  • ...It is now a matter of straightforward calculation to show that our remainder term χrem precisely agrees with the correction term of [21] when we evaluate the latter at l = 2k, a = z, b = q−kz2 and multiply by z−1iθ11/η3....

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  • ...We have the modular properties [21]: Âl(u + 1, v) = (−1)Âl(u, v) Âl(u, v + 1) = Âl(u, v) Âl(u+ τ, v) = (−1)lalb−1q l 2 Âl(u, v) Âl(u, v + τ) = a Âl(u, v) Âl(u, v; τ + 1) = Âl(u, v; τ) Âl( u τ , v τ ;− 1 τ ) = τeπi(2v−lu)u/τ Âl(u, v; τ)....

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  • ...Though it is known from the mathematics literature how to patch up this annoying feature of the holomorphic part of the elliptic genus [21, 22], the physical origin of the patchwork is obscure....

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Journal ArticleDOI
TL;DR: In this paper, the main properties (surface hardness, tensile, and compression strength, as well as fracture toughness) and their anisotropicand inhomogeneous nature are addressed.
Abstract: Additive manufacturing has multiple advantages over conventional fabricationtechniques, such as the geometrical freedom and, to a great extent, theomission of tooling equipment. Hence, futuristic designs and non-standardtopology-optimized structures can be fabricated without causing noteworthyextra cost, since the geometrical complexity is, exaggeratedly spoken, for free.The manufacturing time and the amount of required raw material are the keycriteria, which determine the expenses. What at first glance appears as anengineer’s dream, introduces its complexity in the description of thematerial’s characteristics and their volatility to the manufacturing conditions.Within this study, the main properties (i.e., surface hardness, tensile, andcompression strength, as well as fracture toughness) and their anisotropicand inhomogeneous nature are addressed. Detailed overviews of the progressto date for aluminum, iron, titanium, cobalt, and nickel based raw materialsare provided. Furthermore, an overview about the state-of-the-art in themedical sector is included, comprising the areas of utilization and severaltrail studies.

134 citations


Cites background from "Phd by thesis"

  • ...for military purposes, was the coupling of SLS and hot-isostaticpressing (HIP).([40,41]) From there on, improvements were made on both sides, that is, the raw material and the laser source, leading to metal powder mixtures with a low and high melting metal or alloy....

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Journal ArticleDOI
TL;DR: In this paper, the dielectric properties of polypyrrole-coated textiles in the frequency range 1-18 GHz were investigated using a non-contact, non-destructive free space technique.

134 citations


Cites background from "Phd by thesis"

  • ...Reflection, transmission, absorption and dielectric properties of polypyrrole films and powders have also been reported [40-43]....

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Journal ArticleDOI
TL;DR: In this article, the nucleation of Mo-rich Laves phase particles during aging and creep of 12.5% Cr tempered martensite ferritic steels (TMFS) was investigated.

134 citations


Additional excerpts

  • ...undergo coarsening through Ostwald ripening [17,28,45,46]....

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References
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Journal ArticleDOI
TL;DR: A new family of highly fluorescent indicators has been synthesized for biochemical studies of the physiological role of cytosolic free Ca2+ using an 8-coordinate tetracarboxylate chelating site with stilbene chromophores that offer up to 30-fold brighter fluorescence.

21,582 citations


"Phd by thesis" refers background in this paper

  • ...members of this group were produced by Tsien and colleagues [1, 10, 11]....

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  • ...The introduction of Ca 2+ -sensitive fluorescent dyes more than twenty years ago and their permanent improvement [10] enabled investigators to gain unprecedented insights into the mechanisms of cellular signalling....

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ReportDOI
01 Nov 1990
TL;DR: This report will establish methods for performing a domain analysis and describe the products of the domain analysis process to illustrate the application of domain analysis to a representative class of software systems.
Abstract: : Successful Software reuse requires the systematic discovery and exploitation of commonality across related software systems. By examining related software systems and the underlying theory of the class of systems they represent, domain analysis can provide a generic description of the requirements of that class of systems and a set of approaches for their implementation. This report will establish methods for performing a domain analysis and describe the products of the domain analysis process. To illustrate the application of domain analysis to a representative class of software systems, this report will provide a domain analysis of window management system software.

4,420 citations

Journal ArticleDOI
TL;DR: The straw person model (SPM) as mentioned in this paper has been proposed to explain the orientation effects of active galactic nuclei (AGN) and quasars in the line of sight (LOS) images.
Abstract: Because the critical central regions of Active Galactic Nuclei (AGN) and quasars are strongly nonspherical but spatially unresolved, orientation effects have been the source of much confusion. In fact, it now appears that much of the variety in AGN types is just the result of varying orientation relative to the line of sight. We can define an extreme hypothesis,, the straw person model (SPM), in which there are two basic types of AGN: the radio quiets and the radio louds. For each type there is a range in intrinsic luminosity, and the luminosity controls some properties such as the Fanaroff and Riley classes. However, at a given intrinsic luminosity, all other properties such as spectroscopic classification and VLBI component speeds are ascribed to orientation. This model is only a caricature of the unification idea, and is already ruled out on many grounds, but it will be useful for organizing the discussion. I’ll describe what I consider to be convincing evidence that orientation effects are important and widespread. The true situation may be in some sense half way between the SPM and the hypothesis that orientation doesn’t affect classification at aIl. To us optimists, the orienration cup is half full rather than half empty. Although it is too soon to say for sure, the hypothesis that most objects’ classifications would be different if seen from other directions is a tenable one today.

4,005 citations

Journal ArticleDOI
TL;DR: This Review assembles the current knowledge on the isolation of microfibrillated cellulose from wood and its application in nanocomposites; the preparation of nanocrystalline cellulose and its use as a reinforcing agent; and the biofabrication of bacterial nanocellulose, as well as its evaluation as a biomaterial for medical implants.
Abstract: Cellulose fibrils with widths in the nanometer range are nature-based materials with unique and potentially useful features. Most importantly, these novel nanocelluloses open up the strongly expanding fields of sustainable materials and nanocomposites, as well as medical and life-science devices, to the natural polymer cellulose. The nanodimensions of the structural elements result in a high surface area and hence the powerful interaction of these celluloses with surrounding species, such as water, organic and polymeric compounds, nanoparticles, and living cells. This Review assembles the current knowledge on the isolation of microfibrillated cellulose from wood and its application in nanocomposites; the preparation of nanocrystalline cellulose and its use as a reinforcing agent; and the biofabrication of bacterial nanocellulose, as well as its evaluation as a biomaterial for medical implants.

3,452 citations

Journal ArticleDOI
TL;DR: The solid electrolyte interphase (SEI) is a protecting layer formed on the negative electrode of Li-ion batteries as a result of electrolyte decomposition, mainly during the first cycle as discussed by the authors.

2,386 citations