scholarly journals CHARACTERISTICS OF SHINGLE BEACHES WITH REFERENCE TO CHRISTCHURCH BAY, S. ENGLAND

1988 ◽  
Vol 1 (21) ◽  
pp. 142 ◽  
Author(s):  
Robert Nicholls ◽  
Norman Webber
Keyword(s):  
High Energy ◽  
Sand Fraction ◽  
Distinctive Character ◽  
Long Period ◽  
Seepage Characteristics ◽  
Run Up ◽  
The Stability ◽  
Natural Laboratory

The rapid recession of the shingle bank of Hurst Beach (up to 3.5m/yr) makes it an excellent natural laboratory for the study of the factors which influence the stability of shingle beaches. Studies have included: the significance of long period, high energy, swell waves - the classification and quantification of overwash processes - run-up and seepage characteristics - the effect of settlement of the underlying strata - and the implications for practices in shingle nourishment. The studies have revealed the distinctive character of shingle beaches as compared with the more fully researched sand beaches. More detailed research on shingle beaches is justified particularly in relation to (i) the run-up characteristics including its interaction with swash cusps and (ii) the influence of the subsidiary sand fraction on the beach characteristics.

TEM Analysis of Long-Period Polytypes in SiC—S

1976 ◽  
Vol 34 ◽  
pp. 630-631
Author(s):  
S. Shinozaki ◽  
J. W. Sprys
Keyword(s):  
Electron Diffraction ◽  
Isothermal Annealing ◽  
Tem Analysis ◽  
Long Period ◽  
Transmission Electron ◽  
Average Grain Size ◽  
High Resolution Tem ◽  
Structural Lattice ◽  
The Stability ◽  
Continuous Curves

In reaction sintered SiC (∽ 5um average grain size), about 15% of the grains were found to have long-period structures, which were identifiable by transmission electron microscopy (TEM). In order to investigate the stability of the long-period polytypes at high temperature, crystal structures as well as microstructural changes in the long-period polytypes were analyzed as a function of time in isothermal annealing.Each polytype was analyzed by two methods: (1) Electron diffraction, and (2) Electron micrograph analysis. Fig. 1 shows microdensitometer traces of ED patterns (continuous curves) and calculated intensities (vertical lines) along 10.l row for 6H and 84R (Ramsdell notation). Intensity distributions were calculated based on the Zhdanov notation of (33) for 6H and [ (33)3 (32)2 ]3 for 84R. Because of the dynamical effect in electron diffraction, the observed intensities do not exactly coincide with those intensities obtained by structure factor calculations. Fig. 2 shows the high resolution TEM micrographs, where the striped patterns correspond to direct resolution of the structural lattice periodicities of 6H and 84R structures and the spacings shown in the figures are as expected for those structures.

Long Period Gratings in Multimode Fiber Fabricated with High-Energy Ion Implantation

2003 ◽  
Vol 22 (4) ◽  
pp. 225-237
Author(s):  
K. J. GRANT ◽  
ROBERTS A. ◽  
D. N. JAMIESON ◽  
B. ROUT ◽  
C. CHER
Keyword(s):  
Ion Implantation ◽  
High Energy ◽  
Multimode Fiber ◽  
Long Period ◽  
Long Period Gratings

scholarly journals Carbon Substitution on N24Cages: Crossover between Triangular and Hexagonal Structures

2013 ◽  
Vol 2013 ◽  
pp. 1-6
Author(s):  
Carrie Sanders ◽  
Douglas L. Strout
Keyword(s):  
Theoretical Calculations ◽  
High Energy ◽  
Energy Materials ◽  
Cylindrical Structures ◽  
High Energy Materials ◽  
Energy Applications ◽  
Carbon Substitution ◽  
Complex Forms ◽  
The Stability ◽  
Carbon Inclusion

Complex forms of nitrogen are of interest for their potential as high-energy materials, but many all-nitrogen systems lack the stability for practical high-energy applications. Inclusion of carbon atoms in an otherwise all-nitrogen structure can increase stability. Nitrogen cages are known for energetically preferring cylindrical structures with triangular endcaps, but carbon cages prefer the pentagon-hexagon structure of the fullerenes. Previous calculations on N22C2have shown that carbon inclusion narrows the gap between triangular and fullerene-like structures. In the current study, three isomers of N24are used as frameworks for carbon substitution. Theoretical calculations are carried out on isomers of N20C4, N18C6, and N16C8, with the goal of determining what level of carbon substitution causes the carbon fullerene-like structures to become energetically preferred.

Electrochemical lithium recovery with lithium iron phosphate: What causes performance degradation and how can we improve the stability?

2021 ◽  
Author(s):  
Lei Wang ◽  
Kathleen C Frisella ◽  
Pattarachai Srimuk ◽  
Oliver Janka ◽  
Guido Kickelbick ◽  
...  
Keyword(s):  
Energy Efficiency ◽  
Manganese Oxide ◽  
Lithium Iron Phosphate ◽  
Iron Phosphate ◽  
High Energy ◽  
Performance Degradation ◽  
Electrochemical Processes ◽  
High Energy Efficiency ◽  
The Stability

Electrochemical processes enable fast lithium extraction, for example, from brines, with high energy efficiency and stability. Lithium iron phosphate (LiFePO4) and manganese oxide (λ-MnO2) have usually been employed as the...

scholarly journals MICROMORPHOLOGICAL DIAGNOSIS OF THE STABILITY OF CHERNOZEMS UNDER IRRIGATION

2014 ◽  
pp. 52-73 ◽  
Author(s):  
T. V. Tursina
Keyword(s):  
Irrigation Water ◽  
Ionic Composition ◽  
Soil Porosity ◽  
Long Period ◽  
The Stability ◽  
Anthropogenic Evolution

Chernozems under irrigation for a long period of time have been studied using the micromorphological methods. The soil porosity, the amount of microaggregates, biogeneity, humus microforms and the presence or formation of optically oriented clay were taken as the basic indices for estimating the stability of chernozems to irrigation during 30-50 years. The different ionic composition of the irrigation water serves as evidence of varying anthropogenic evolution of chernozems.

Scanning system for high-energy electron diffractometry

1999 ◽  
Vol 32 (6) ◽  
pp. 1033-1038 ◽  
Author(s):  
A. S. Avilov ◽  
A. K. Kuligin ◽  
U. Pietsch ◽  
J. C. H. Spence ◽  
V. G. Tsirelson ◽  
...  
Keyword(s):  
High Energy ◽  
Scanning System ◽  
Registration System ◽  
Hartree Fock ◽  
Intensity Measurements ◽  
Structure Factors ◽  
Additional Control ◽  
Thin Polycrystalline ◽  
The Stability ◽  
Electron Diffractometry

A new electron diffractometer with a diffraction-pattern scanning system in front of a fixed counter has been developed. Significant improvement was achieved in the measured diffraction intensities by using fast electronics and additional control of the stability of the electron beam. The measurement of and accounting for the gear-frequency characteristic of the registration system was performed, and the signal accumulation mode for intensity measurements together with advanced statistical data processing were employed. Good agreement between the experimental and Hartree–Fock structure factors for LiF, NaF and MgO was achieved (to avoid strong extinction effects, rather thin polycrystalline films were used as samples).

Mössbauer analysis of high-energy mechanical-milled sand fraction of a magnetic soil developing on basalt

LACAME 2010 ◽  
2011 ◽  
pp. 167-173
Author(s):  
José Flávio Marcelino Borges ◽  
Marlon Luiz Hneda ◽  
André Maurício Brinatti ◽  
João Batista Marimon da Cunha ◽  
Jadir Aparecido Rosa ◽  
...  
Keyword(s):  
High Energy ◽  
Sand Fraction ◽  
Magnetic Soil ◽  
Mössbauer Analysis

Governing by Rules and Ruling by Numbers in the Eurozone Crisis

2020 ◽  
pp. 87-116
Author(s):  
Vivien A. Schmidt
Keyword(s):  
European Monetary Union ◽  
Political Legitimacy ◽  
Monetary Integration ◽  
Banking Union ◽  
Eurozone Crisis ◽  
Policy Responses ◽  
Growth Pact ◽  
History Of ◽  
Run Up ◽  
The Stability

Chapter 4 provides an overview of the Eurozone crisis, to serve as a background for the subsequent four chapters which discuss in turn each of the four EU actors’ particular pathways to legitimacy, including their sources of power and grounds for throughput legitimacy, along with the Janus-faced public perceptions of their Eurozone governance. The chapter begins with a brief review of the history of European Monetary Union (EMU), describing the trials and tribulations in the run-up to the Maastricht Treaty and member states’ very different ideas and discourse related to monetary integration, as illustrated by the differences in German, French, and Italian views. It then considers what happened at the time of the introduction of the single currency. The chapter follows with the initial responses to the Eurozone crisis during its fast-burning phase, characterized by a doubling down on the rules of the Stability and Growth Pact. It elaborates on the trials and tribulations at the inception of the crisis, on EU actors’ initial actions and reactions, and on institutional innovations such as banking union. It also provides further details on legislation and treaty agreements, as well as on the ideas underpinning the policy responses. The chapter ends by considering the benefits and drawbacks of EU actors’ subsequent reinterpretation of the rules by stealth during the Eurozone crisis’ slow-burning phase, arguing that although rules reinterpretation may have improved policy responses (output), not admitting this raised questions of accountability and transparency (throughput), while failing to address problems of political legitimacy (input).

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