scholarly journals The rich frequency spectrum of the triple-mode variable AC And

2013 ◽  
Vol 9 (S301) ◽  
pp. 443-444
Author(s):  
Géza Kovács ◽  
Gáspár A. Bakos ◽  
Joel D. Hartman
Keyword(s):  
Fourier Analysis ◽  
Light Curve ◽  
Frequency Spectrum ◽  
Linear Combinations ◽  
Period Increase ◽  
Frequency Structure ◽  
The Rich ◽  
Triple Mode ◽  
Three Components

AbstractFourier analysis of the light curve of AC And from the HATNet database reveals the rich frequency structure of this object. Above 30 components are found down to the amplitude of 3 mmag. Several of these frequencies are not the linear combinations of the three basic components. We detect period increase in all three components that may lend support to the Population I classification of this variable.

scholarly journals THE PROBLEM OF TYPOLOGY IN CHINESE ARCHAEOLOGY

Early China ◽  
2016 ◽  
Vol 39 ◽  
pp. 21-52 ◽  
Author(s):  
Anke Hein
Keyword(s):  
English Language ◽  
Archaeological Research ◽  
Future Directions ◽  
Chinese Archaeology ◽  
Archaeological Method And Theory ◽  
Archaeological Work ◽  
History Of ◽  
Archaeological Method ◽  
The Rich

AbstractChinese and Western archaeologists (especially those of the anthropologically-oriented tradition) often seem to be talking past each other, not only because they are publishing in different languages, but also because of differences in theory and method. While most of the major theoretical works in Western languages are by now available in Chinese translations, hardly any English-language publications exist that explain Chinese approaches to archaeological method and theory. This article helps to bridge the gap by introducing the history of debates on archaeological method in China to a Western audience, focusing particularly on issues of typology and classification. Discussing in detail the merits—and issues—of approaches suggested by four of the most influential Chinese archaeologists (Li Chi, Xia Nai, Su Bingqi, and K. C. Chang), this article provides a deeper understanding of the preconditions of archaeological research in China. It also suggests future directions for archaeological work by local and foreign archaeologists, including but also going beyond the classification of the rich body of artifacts coming to light in Chinese excavations.

scholarly journals Mushroom Biomass: Some Clinical Implications of β-Glucans and Enzymes

2016 ◽  
Vol 4 (Special-Issue-October) ◽  
pp. 37-47
Author(s):  
Ana Barros ◽  
Vitoria Bell ◽  
Jorge Ferrão ◽  
Vittorio Calabrese ◽  
Tito Fernandes
Keyword(s):  
Secondary Metabolites ◽  
Dietary Supplement ◽  
Biological Response ◽  
Cellular Growth ◽  
Health Promoting ◽  
The Rich ◽  
The Difference ◽  
Cytochrome P 450

Mushrooms have attracted market attention because they are a potential source of bioactive compounds able to perform several functions in organisms with benefits for the health of the consumer. Cultivation processes vary according a) industrial fermentation - in large vats to produce extracted form of mushrooms or b) closed cultivation system - individually grown in jars on an aseptic “substrate” with controlled lighting and irrigation to produce a biomass form of mushrooms. Biomass is the mycelium with primordia (young fruiting body - before the mushroom blooms) containing all the nutrients and active compounds, including β-glucans, enzymes and secondary metabolites. The classification of mushroom biomass varies according to the presentation; the biomass can be classified as a “food” if in powder form or, classified as a “dietary supplement” in tablet form. While tablet mushroom biomass is considered a dietary supplement, mushroom extracts are designated pharmaceutical compounds, pharmanutrients or nutraceuticals. Here we illustrate the difference between mushrooms in the biomass and extract forms, the similarities and differences on its content on enzymes, secondary metabolites and on β-glucans, as a soluble and fermentable fibre. Of particular note is the rich enzyme activity in the biomass form of mushrooms. Such activity includes enzymes that prevent oxidative stress (superoxide dismutase), enzymes that prevent cellular growth (protease, glucoamylase) and enzymes that promote detoxification (cytochrome P-450, peroxidase, glucose-2-oxidase). β-glucans have been proposed to act as “biological response modifiers” based on their effects on the immune system, and its role in the prevention and treatment of various metabolic syndrome-linked diseases. This review focuses also on some described health-promoting potential of mushroom biomass, all through immunomodulation. The role of intestinal microbiota is enhanced.

scholarly journals FAST REGISTRATION OF TERRESTRIAL LIDAR POINT CLOUD AND SEQUENCE IMAGES

2017 ◽  
Vol XLII-2/W7 ◽  
pp. 875-879
Author(s):  
J. Shao ◽  
W. Zhang ◽  
Y. Zhu ◽  
A. Shen
Keyword(s):  
Point Cloud ◽  
Engineering Application ◽  
Image Point ◽  
Color Information ◽  
Registration Accuracy ◽  
Registration Method ◽  
Terrestrial Lidar ◽  
The Rich ◽  
Ground Based Lidar

Image has rich color information, and it can help to promote recognition and classification of point cloud. The registration is an important step in the application of image and point cloud. In order to give the rich texture and color information for LiDAR point cloud, the paper researched a fast registration method of point cloud and sequence images based on the ground-based LiDAR system. First, calculating transformation matrix of one of sequence images based on 2D image and LiDAR point cloud; second, using the relationships of position and attitude information among multi-angle sequence images to calculate all transformation matrixes in the horizontal direction; last, completing the registration of point cloud and sequence images based on the collinear condition of image point, projective center and LiDAR point. The experimental results show that the method is simple and fast, and the stitching error between adjacent images is litter; meanwhile, the overall registration accuracy is high, and the method can be used in engineering application.

scholarly journals Geoheritage in Deltaic Environments: Classification Notes, Case Example, and Geopark Implication

Environments ◽  
2019 ◽  
Vol 6 (2) ◽  
pp. 18 ◽  
Author(s):  
Anna Mikhailenko ◽  
Dmitry Ruban
Keyword(s):  
River Delta ◽  
Anthropogenic Sources ◽  
Full Spectrum ◽  
River Deltas ◽  
Geological Features ◽  
Don River ◽  
The Rich ◽  
Ecosystem Interactions ◽  
Geological Phenomenon

River deltas boast ecosystem richness, but their efficient conservation and management require consideration of the full spectrum of natural phenomena, including those which are geological. Few specialists have explored the issue of deltaic geological heritage (geoheritage), and the relevant knowledge remains scarce and non-systematised. This paper proposes the first classification of this geoheritage. Five categories are distinguished: entire-delta geological phenomenon, delta-associated “purely” geological features, delta-associated features resulting from geology–ecosystem interactions, geological features occasional to deltas, and geoarchaeological localities in deltas. Chosen as a case example, the Don River delta in the southwestern part of Russia possesses geoheritage of these categories, except for the latter. The relevant unique geological features differ by their types and ranks. Of particular interest is the phenomenon of a self-cleaning environment which prevents mercury concentration in the soil despite pollution from natural and anthropogenic sources. The complexity of the deltaic geoheritage, its co-existence with the rich biodiversity, and the aesthetical issues make geopark creation in river deltas a sensible venture. Relevant proposals have been made for Malaysia and the Netherlands–Belgium border, and the Don River delta in Russia also presents an appropriate location for geopark creation.

scholarly journals Comparison of Mean Light Curve Parameters of M, S and C Mira and Semi-Regular Variable Stars Using 75 Years of AAVSO Data

2000 ◽  
Vol 177 ◽  
pp. 165-170
Author(s):  
Marie-Odile Mennessier ◽  
Hichame Boughaleb ◽  
Janet A. Mattei
Keyword(s):  
Light Curve ◽  
Variable Stars ◽  
Light Curves ◽  
Long Period ◽  
Regular Variable

Using 75 years of AAVSO data, mean light curve parameters of a sample of 350 long-period M, S and C Mira and semi-regular variable stars have been investigated. We compare M, S and C Mira and semi-regular stars, present a classification of the light curves of LPVs and give discriminant parameters.

VII.—Graphical Classification of Carbonaceous Minerals: the Place of the Constituents of Common Coal

1933 ◽  
Vol 52 ◽  
pp. 195-199 ◽  
Author(s):  
Henry Briggs
Keyword(s):  
Coal Seam ◽  
Royal Society ◽  
Close Study ◽  
Three Components

This communication extends the method of classifying carbonaceous minerals already introduced in order to include the three components of common coal. The existence of the three constituents has long been recognised, but their close study, and the nomenclature now generally accepted, date from 1919, when Dr M. C. Stopes described their salient characteristics in a paper to the Royal Society. In that paper she gave the name durain to the hard, lustreless constituent, that of vitrain to the lustrous part, and borrowed the French miner's name fusain for the charcoal-like material commonly found between the bands of a coal seam. A bright variety, called clarain by Dr Stopes, is now usually regarded as a blend rather than as a separate substance, and may be disregarded in a classification such as this.

scholarly journals KIC 10486425: A Kepler eclipsing binary system with a pulsating component

2013 ◽  
Vol 9 (S301) ◽  
pp. 433-434 ◽  
Author(s):  
Filiz Kahraman Aliçavuş ◽  
Esin Soydugan
Keyword(s):  
Binary System ◽  
Fourier Analysis ◽  
Light Curve ◽  
Frequency Analysis ◽  
Dominant Frequency ◽  
Eclipsing Binary

AbstractWe present frequency analysis of the Kepler light curve of KIC 10486425, an eclipsing binary system with a pulsating component. The parameters of the binary were obtained by modelling the light curve with the Wilson-Devinney program. The residuals from this modelling were subject to Fourier analysis which allowed us to detect 120 periodic terms characteristic for γ Dor-type pulsations. The dominant frequency of these changes amounts to 1.3189 d−1.

The rich but confusing terminology of biological nomenclature: a first step towards a comprehensive glossary

Bionomina ◽  
2011 ◽  
Vol 3 (1) ◽  
pp. 63-70
Author(s):  
Alain DUBOIS
Keyword(s):  
Scientific Discipline ◽  
Human Needs ◽  
Higher Taxa ◽  
Unique System ◽  
Basic Need ◽  
The Rich ◽  
Living Organisms ◽  
Protect Study

Biology deals with billions of living organisms, which display a great diversity but also share many characters, being the result of an evolution. Designating these organisms in a universal and unambiguous way is a basic need for communication, not only among taxonomists or even biologists, but with society as a whole. It is indispensable to have a unique system for distinguishing and naming the organisms that may be used for alimentary, agronomical, veterinary or medical purposes or for any other human needs, that may be responsible for diseases, pollutions, biotic invasions, that we may wish to protect, study or admire, etc. For all these purposes, we need a scientific discipline, taxonomy, dealing not only with the classification of living organisms into millions of classificatory units, the taxa, but also with the designation and indexation of these taxa (nomenclature). Biological nomenclature has to care for the scientific naming of millions of taxa (species and higher taxa like genera or families), the inventory of which is still very far from being finished.

scholarly journals Classification of ASKAP VAST Radio Light Curves

2011 ◽  
Vol 7 (S285) ◽  
pp. 397-399 ◽  
Author(s):  
Umaa Rebbapragada ◽  
Kitty Lo ◽  
Kiri L. Wagstaff ◽  
Colorado Reed ◽  
Tara Murphy ◽  
...  
Keyword(s):  
Best Practices ◽  
Light Curve ◽  
Field Survey ◽  
Classification Performance ◽  
Light Curves ◽  
Classification Algorithms ◽  
Wide Field ◽  
Radio Transients ◽  
Instrument Sensitivity

AbstractThe VAST survey is a wide-field survey that observes with unprecedented instrument sensitivity (0.5 mJy or lower) and repeat cadence (a goal of 5 seconds) that will enable novel scientific discoveries related to known and unknown classes of radio transients and variables. Given the unprecedented observing characteristics of VAST, it is important to estimate source classification performance, and determine best practices prior to the launch of ASKAP's BETA in 2012. The goal of this study is to identify light-curve characterization and classification algorithms that are best suited for archival VAST light-curve classification. We perform our experiments on light-curve simulations of eight source types and achieve best-case performance of approximately 90% accuracy. We note that classification performance is most influenced by light-curve characterization rather than classifier algorithm.

scholarly journals CLASSIFICATION OF BIFURCATIONS AND ROUTES TO CHAOS IN A VARIANT OF MURALI–LAKSHMANAN–CHUA CIRCUIT

2002 ◽  
Vol 12 (04) ◽  
pp. 783-813 ◽  
Author(s):  
K. THAMILMARAN ◽  
M. LAKSHMANAN
Keyword(s):  
Period Doubling ◽  
Routes To Chaos ◽  
Rich Variety ◽  
Chua Circuit ◽  
Bifurcation Phenomena ◽  
Simulation Results ◽  
The Rich ◽  
Doubling Sequence ◽  
Two Parameter

We present a detailed investigation of the rich variety of bifurcations and chaos associated with a very simple nonlinear parallel nonautonomous LCR circuit with Chua's diode as its only nonlinear element as briefly reported recently [Thamilmaran et al., 2000]. It is proposed as a variant of the simplest nonlinear nonautonomous circuit introduced by Murali, Lakshmanan and Chua (MLC) [Murali et al., 1994]. In our study we have constructed two-parameter phase diagrams in the forcing amplitude-frequency plane, both numerically and experimentally. We point out that under the influence of a periodic excitation a rich variety of bifurcation phenomena, including the familiar period-doubling sequence, intermittent and quasiperiodic routes to chaos as well as period-adding sequences, occur. In addition, we have also observed that the periods of many windows satisfy the familiar Farey sequence. Further, reverse bifurcations, antimonotonicity, remerging chaotic band attractors, and so on, also occur in this system. Numerical simulation results using Poincaré section, Lyapunov exponents, bifurcation diagrams and phase trajectories are found to be in agreement with experimental observations. The chaotic dynamics of this circuit is observed experimentally and confirmed both by numerical and analytical studies as well PSPICE simulation results. The results are also compared with the dynamics of the original MLC circuit with reference to the two-parameter space to show the richness of the present circuit.

Sign in / Sign up

Export Citation Format

Share Document