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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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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


Cites methods from "Phd by thesis"

  • ...Kay (1990) and Tran et al (1992) have fo und more Seyfert 2s with broad permitted lines in the polarized fl ux, but the FC polarizations are generally much less than that of NGC 1068....

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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


Cites background or methods from "Phd by thesis"

  • ...b) Spheres formed by agitated cultivation with a shaking rate of 80–100 rpm; diameter: 2–3 mm, smooth surface.([181]) c) Tubes...

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  • ...a) Film prepared in a PP container under static conditions; dimensions: 25 25 cm(2), thickness: 200 mm.([181]) b) Spheres formed by agitated cultivation with a shaking rate of 80–100 rpm; diameter: 2–3 mm, smooth surface....

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Journal ArticleDOI
TL;DR: The Arcade Learning Environment (ALE) as discussed by the authors is a platform for evaluating the development of general, domain-independent AI technology, which provides an interface to hundreds of Atari 2600 game environments, each one different, interesting, and designed to be a challenge for human players.
Abstract: In this article we introduce the Arcade Learning Environment (ALE): both a challenge problem and a platform and methodology for evaluating the development of general, domain-independent AI technology. ALE provides an interface to hundreds of Atari 2600 game environments, each one different, interesting, and designed to be a challenge for human players. ALE presents significant research challenges for reinforcement learning, model learning, model-based planning, imitation learning, transfer learning, and intrinsic motivation. Most importantly, it provides a rigorous testbed for evaluating and comparing approaches to these problems. We illustrate the promise of ALE by developing and benchmarking domain-independent agents designed using well-established AI techniques for both reinforcement learning and planning. In doing so, we also propose an evaluation methodology made possible by ALE, reporting empirical results on over 55 different games. All of the software, including the benchmark agents, is publicly available.

2,429 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

References
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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

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

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

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

Journal ArticleDOI
TL;DR: The immobilisation of P450 BM-3 (CYP 102A1) from Bacillus megaterium in a sol-gel matrix was combined with a cofactor recycling system based on NADPƒy-dependent formate dehydrogenase (EC 1.2.1.2) to render these catalysts more suitable for industrial biocatalysis.
Abstract: Cytochrome P450 monooxygenases are potentially a very useful class of hydroxylation catalysts; they are able to introduce oxygen at activated and non-activated carbon-hydrogen bonds and thus lead to regio- and/or stereochemically pure compounds However, this potential is lowered by their intrinsic low activity and inherent instability P450-catalysed biotransformations require a constant supply of NAD(P)H, making the process an expensive one To render these catalysts more suitable for industrial biocatalysis, the immobilisation of P450 BM-3 (CYP 102A1) from Bacillus megaterium in a sol-gel matrix was combined with a cofactor recycling system based on NADPƒy-dependent formate dehydrogenase (EC 1212) from Pseudomonas sp 101 and tested for practical applicability This approach was used for the conversion of £]-ionone, octane and naphthalene to the respective hydroxy-compounds with DMSO as cosolvent using sol-gel immobilised P450 BM-3 mutants

134 citations