scholarly journals New methods for reconstructing geographical effects on dispersal rates and routes from large-scale radiocarbon databases

2014 ◽  
Vol 52 ◽  
pp. 609-620 ◽  
Author(s):  
Fabio Silva ◽  
James Steele
Keyword(s):  
Large Scale ◽  
New Methods

New methods of metaphor identification in various types of discourse (Review of publications)

2021 ◽  
Vol 1 (6) ◽  
pp. 19-31
Author(s):  
Peter M. Shitikov ◽  
◽  
Svetlana V. Vershinina
Keyword(s):  
Corpus Linguistics ◽  
Large Scale ◽  
Historical Background ◽  
Great Success ◽  
Research Groups ◽  
Identification Procedure ◽  
New Methods ◽  
Starting Point ◽  
Different Types ◽  
Theoretical Foundations

This article presents a review of the latest procedures for identifying metaphor in multilingual texts and different types of discourse. The choice of methods for identifying and decoding metaphorical expressions is the starting point of any research in the field of metaphorology. With the development of corpus linguistics methods, the volume of analyzed material has grown thousands of times. So, the identification of linguistic expressions in discourse that realize conceptual metaphors has become one of the most challenging issues of modern metaphorology. The paper describes theoretical foundations and historical background for the solution of this issue. It is shown that it is impossible to verify this or that method without a large-scale approbation; in this connection, the developments of research groups (PALASIGMET, PRAGGLEJAZ) proved to be the most perspective. The MIP (metaphor identification procedure) was finalized in the metaphor laboratory of the Free University of Amsterdam with the name MIPVU. This methodology was a great success all over the world, however, in Russia only a few articles of introductory character have appeared. This article summarizes the experience of applying the procedures of metaphor identification in different languages and types of discourse.

Ensemble Methods for Improving Classification of Data Produced by Latent Dirichlet Allocation

2019 ◽  
Vol 0 (8/2018) ◽  
pp. 17-28
Author(s):  
Maciej Jankowski
Keyword(s):  
Text Analysis ◽  
Large Scale ◽  
Latent Dirichlet Allocation ◽  
Previous Analysis ◽  
Ensemble Methods ◽  
Topic Modelling ◽  
New Methods ◽  
Data Scientist ◽  
Dirichlet Allocation

Topic models are very popular methods of text analysis. The most popular algorithm for topic modelling is LDA (Latent Dirichlet Allocation). Recently, many new methods were proposed, that enable the usage of this model in large scale processing. One of the problem is, that a data scientist has to choose the number of topics manually. This step, requires some previous analysis. A few methods were proposed to automatize this step, but none of them works very well if LDA is used as a preprocessing for further classification. In this paper, we propose an ensemble approach which allows us to use more than one model at prediction phase, at the same time, reducing the need of finding a single best number of topics. We have also analyzed a few methods of estimating topic number.

Options and Prospects of Conceptual Approach Development for Managing Integrated Business Structures

Upravlenie ◽  
10.12737/2819 ◽  
2014 ◽  
Vol 2 (1) ◽  
pp. 57-60
Author(s):  
Мальчевский ◽  
A. Malchevskiy ◽  
Афанасьев ◽  
Valentin Afanasev
Keyword(s):  
Large Scale ◽  
Conceptual Approach ◽  
Bank Holding Company ◽  
Holding Company ◽  
Solid Ground ◽  
New Methods ◽  
New Approaches ◽  
Business Structures ◽  
Integrated Structures

Application of new methods for managing large-scale integrated structures are considered as exemplified by the bank holding company. The factors urging the use of new approaches are highlighted. The author gives solid ground for options and prospects for development of conceptual approach, ensuring consistency of goals and enhancing integration of a holding company’s components.

Data “big” and “small” – Examples from the Australian lexical database

2015 ◽  
Vol 1 (1) ◽  
Author(s):  
Claire Bowern
Keyword(s):  
Big Data ◽  
Large Scale ◽  
Qualitative Data ◽  
Language Change ◽  
First Century ◽  
Lexical Database ◽  
Traditional Methods ◽  
New Methods ◽  
Statistical Approaches ◽  
Insight Into

AbstractThe twenty-first Century has been billed the era of “big data”, and linguists are participating in this trend. We are seeing an increased reliance on statistical and quantitative arguments in most fields of linguistics, including the oldest parts of the field, such as the study of language change. The increased use of statistical methods changes the types of questions we can ask of our data, as well as how we evaluate the answers. But this all has the prerequisite of certain types of data, coded in certain ways. We cannot make powerful statistical arguments from the qualitative data that historical linguists are used to working with. In this paper I survey a few types of work based on a lexical database of Pama-Nyungan languages, the largest family in Aboriginal Australia. I highlight the flexibility with which large-scale databases can be deployed, especially when combined with traditional methods. “Big” data may require new methods, but the combination of statistical approaches and traditional methods is necessary for us to gain new insight into old problems.

scholarly journals WAVE-GENERATED FLOWS ON THE WATER SURFACE

2016 ◽  
Vol 42 ◽  
pp. 1660179
Author(s):  
MICHAEL SHATS ◽  
HORST PUNZMANN ◽  
NICOLAS FRANCOIS ◽  
HUA XIA
Keyword(s):  
Water Surface ◽  
Large Scale ◽  
Three Dimensional ◽  
Surface Flow ◽  
Theoretical Problem ◽  
Complex Flows ◽  
Localized Source ◽  
New Methods ◽  
Flow Generation ◽  
Surface Jets

Predicting trajectories of fluid parcels on the water surface perturbed by waves is a difficult mathematical and theoretical problem. It is even harder to model flows generated on the water surface due to complex three-dimensional wave fields, which commonly result from the modulation instability of planar waves. We have recently shown that quasi-standing, or Faraday, waves are capable of generating horizontal fluid motions on the water surface whose statistical properties are very close to those in two-dimensional turbulence. This occurs due to the generation of horizontal vortices. Here we show that progressing waves generated by a localized source are also capable of creating horizontal vortices. The interaction between such vortices can be controlled and used to create stationary surface flows of desired topology. These results offer new methods of surface flow generation, which allow engineering inward and outward surface jets, large-scale vortices and other complex flows. The new principles can be also be used to manipulate floaters on the water surface and to form well-controlled Lagrangian coherent structures on the surface. The resulting flows are localized in a narrow layer near the surface, whose thickness is less than one wavelength.

scholarly journals THE LARGE-SCALE SEPARATION OF PEROXISOMES, MITOCHONDRIA, AND LYSOSOMES FROM THE LIVERS OF RATS INJECTED WITH TRITON WR-1339

1968 ◽  
Vol 37 (2) ◽  
pp. 482-513 ◽  
Author(s):  
Federico Leighton ◽  
Brian Poole ◽  
Henri Beaufay ◽  
Pierre Baudhuin ◽  
John W. Coffey ◽  
...  
Keyword(s):  
Large Scale ◽  
Morphological Properties ◽  
Enzyme Assays ◽  
Acid Oxidase ◽  
Scale Separation ◽  
New Methods ◽  
Cytoplasmic Dna ◽  
Direct Measurements ◽  
Triton Wr 1339 ◽  
Automated Methods

Improved, largely automated methods are described for the purification and analysis o peroxisomes, lysosomes, and mitochondria from the livers of rats injected with Triton WR-1339. With these new methods, it has become possible to obtain, in less than 6 hr and with reliable reproducibility, mitochondria practically free of contaminants, as well as the rarer cytoplasmic particles in amounts (about 100 mg of protein) and in a state of purity (95%) that make them suitable for detailed biochemical studies. The results obtained so far on these preparations have made more conclusive and precise previous estimates of the biochemical and morphological properties of the three groups of cytoplasmic particles. In addition, peroxisomes were found to contain essentially all the L-α-hydroxy acid oxidase of the liver, as well as a small, but significant fraction of its NADP-linked isocitrate dehydrogenase activity. Another small fraction of the latter enzyme is present in the mitochondria, the remainder being associated with the cell sap. The mitochondrial localization of the metabolically active cytoplasmic DNA could be verified. The relative content of the fractions in mitochondria, whole peroxisomes, peroxisome cores, lysosomes, and endoplasmic reticulum was estimated independently by direct measurements on electron micrographs, and by linear programming (based on the assumption that the particles are biochemically homogeneous) of the results of enzyme assays. The two types of estimates agreed very well, except for one fraction in which low cytochrome oxidase activity was associated with mitochondrial damage.

Processing of Titanates and Zeolites and use of a Cartridge System for ’Reactor‘ Wastes

1981 ◽  
Vol 6 ◽  
Author(s):  
S. Forberg ◽  
T. Westermark ◽  
K. Svärdströbm ◽  
L. FÄlth
Keyword(s):  
Large Scale ◽  
Hot Isostatic Pressing ◽  
Sodium Titanate ◽  
Coarse Grain ◽  
Inorganic Ion Exchangers ◽  
New Methods ◽  
Inorganic Ion ◽  
Composite Ion Exchanger ◽  
Practical Experiences ◽  
Radioactive Species

ABSTRACTNew methods were introduced in order to facilitate the production of i) very coarse-grain pure mordenite at a large scale ii) mono-disperse sodium titanate of a low price also at small volumes, and iii) a composite ion exchanger with up to 20 W-% of mordenite in beads of sodium titanate.Zeolites and titanates were converted to ceramic bodies by hot isostatic pressing at 1 300°C or by cold pressing followed by sintering at temperatures up to 1 300° C. Processed materials were zeolites, titanates and mixtures of them. The mechanical properties of sintered titanates were inferior to the hot pressed ones. Diffraction studies, static leaching at 40°C and Soxhlet leach tests were performed. The leach rates were much higher for mixed materials than for pure ones.For the handling of inorganic ion exchangers through all processes from packing of inactive beds and immobilization of radioactive species to the sintering or hot pressing for final disposal a system of cartridges is suggested. A lay-out of the system is presented together with some special arguments and some practical experiences. Simple, safe and hygienic operations with an optimal use of the inorganic sorbents are expected to result from this system.

A Class of Preconditioned TGHSS-Based Iteration Methods for Weakly Nonlinear Systems

2016 ◽  
Vol 6 (4) ◽  
pp. 367-383 ◽  
Author(s):  
Min-Li Zeng ◽  
Guo-Feng Zhang
Keyword(s):  
Nonlinear Systems ◽  
Iteration Method ◽  
Large Scale ◽  
Positive Definite ◽  
Weakly Nonlinear ◽  
Large Scale Systems ◽  
New Methods ◽  
Iteration Methods ◽  
Optimal Iterative Parameters ◽  
Two Parameter

AbstractIn this paper, we first construct a preconditioned two-parameter generalized Hermitian and skew-Hermitian splitting (PTGHSS) iteration method based on the two-parameter generalized Hermitian and skew-Hermitian splitting (TGHSS) iteration method for non-Hermitian positive definite linear systems. Then a class of PTGHSS-based iteration methods are proposed for solving weakly nonlinear systems based on separable property of the linear and nonlinear terms. The conditions for guaranteeing the local convergence are studied and the quasi-optimal iterative parameters are derived. Numerical experiments are implemented to show that the new methods are feasible and effective for large scale systems of weakly nonlinear systems.

scholarly journals Not restricted to selection research: Accounting for indirect range restriction in organizational research

2019 ◽  
Author(s):  
Jeffrey Alan Dahlke ◽  
Brenton M. Wiernik
Keyword(s):  
Large Scale ◽  
Meta Analysis ◽  
Predictor Variables ◽  
Sampling Variance ◽  
Range Restriction ◽  
Organizational Research ◽  
New Methods ◽  
Selection Research ◽  
Meta Analyses ◽  
Statistical Artifact

Range restriction is a common problem in organizational research and is an important statistical artifact to correct for in meta-analysis. Historically, researchers have had to rely on range-restriction correc-tions that only make use of range-restriction information for one variable, but it is not uncommon for researchers to have such information for both variables in a correlation (e.g., when studying the cor-relation between two predictor variables). However, existing meta-analytic methods incorporating these corrections overlook their unique implications for estimating the sampling variance of corrected correlations and for accurately assigning weights to studies in individual-correction meta-analyses. We introduce new methods for computing individual-correction and artifact-distribution meta-analyses us-ing the bivariate indirect range-restriction (BVIRR; “Case V”) correction and describe improved meth-ods for applying BVIRR corrections that substantially reduce bias in parameter estimation. We illustrate the effectiveness of these methods in a large-scale simulation and in meta-analyses of expatriate data. We provide R code to implement the methods described in this article; more comprehensive and robust functions for applying these methods are available in the psychmeta package for R (Dahlke & Wiernik, 2018, 2017/2019).

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