scholarly journals Jeans analysis in energy–momentum-squared gravity

2020 ◽  
Vol 80 (2) ◽  
Author(s):  
Ali Kazemi ◽  
Mahmood Roshan ◽  
Ivan De Martino ◽  
Mariafelicia De Laurentis
Keyword(s):  
Mass Scale ◽  
Observational Evidence ◽  
Point Of View ◽  
The Other ◽  
Physical Point ◽  
Local Perturbations ◽  
Wide Range ◽  
Massive Neutron Star ◽  
Gravitational Stability ◽  
Thin Disks

Abstract In this paper, we study the Jeans analysis in the context of energy–momentum-squared gravity (EMSG). More specifically we find the new Jeans mass for non-rotating infinite mediums as the smallest mass scale for local perturbations that can be stable against its own gravity. Furthermore, for rotating mediums, specifically for rotating thin disks in the context of EMSG, we find a new Toomre-like criterion for the local gravitational stability. Finally, the results are applied to a hyper-massive neutron star, as an astrophysical system. Using a simplified toy model we have shown that, for a positive (negative) value of the EMSG parameter $$\alpha $$α, the system is stable (unstable) in a wide range of $$\alpha $$α. On the other hand, no observational evidence has been reported on the existence of local fragmentation in HMNS. Naturally, this means that EMSG with positive $$\alpha $$α is more acceptable from the physical point of view.

RHYNCHOLITES AND THE PROBLEM OF NARROW AND BROAD CONCEPTION OF TAXONS

2018 ◽  
pp. 12-17 ◽  
Author(s):  
I. R. Khuzina ◽  
V. N. Komarov
Keyword(s):  
Sexual Dimorphism ◽  
Morphological Characteristics ◽  
Mass Scale ◽  
Individual Variability ◽  
Point Of View ◽  
The Other ◽  
New Taxon ◽  
Artificial System ◽  
Broad Understanding

The paper considers a point of view, based on the conception of the broad understanding of taxons. According to this point of view, rhyncholites of the subgenus Dentatobeccus and Microbeccus are accepted to be synonymous with the genus Rhynchoteuthis, and subgenus Romanovichella is considered to be synonymous with the genus Palaeoteuthis. The criteria, exercising influence on the different approaches to the classification of rhyncholites, have been analyzed (such as age and individual variability, sexual dimorphism, pathological and teratological features, degree of disintegration of material), underestimation of which can lead to inaccuracy. Divestment of the subgenuses Dentatobeccus, Microbeccus and Romanovichella, possessing very bright morphological characteristics, to have an independent status and denomination to their synonyms, has been noted to be unjustified. An artificial system (any suggested variant) with all its minuses is a single probable system for rhyncholites. The main criteria, minimizing its negative sides and proving the separation of the new taxon, is an available mass-scale material. The narrow understanding of the genus, used in sensible limits, has been underlined to simplify the problem of the passing the view about the genus to the other investigators and recognition of rhyncholites for the practical tasks.

Combining Forms and Affixoids in Morphology

2020 ◽  
Author(s):  
Dany Amiot ◽  
Edwige Dugas
Keyword(s):  
Major Part ◽  
Word Formation ◽  
Point Of View ◽  
The Other ◽  
Formation Processes ◽  
Good Criterion ◽  
Part Of Speech ◽  
Starting Point ◽  
Wide Range ◽  
The One

Word-formation encompasses a wide range of processes, among which we find derivation and compounding, two processes yielding productive patterns which enable the speaker to understand and to coin new lexemes. This article draws a distinction between two types of constituents (suffixes, combining forms, splinters, affixoids, etc.) on the one hand and word-formation processes (derivation, compounding, blending, etc.) on the other hand but also shows that a given constituent can appear in different word-formation processes. First, it describes prototypical derivation and compounding in terms of word-formation processes and of their constituents: Prototypical derivation involves a base lexeme, that is, a free lexical elements belonging to a major part-of-speech category (noun, verb, or adjective) and, very often, an affix (e.g., Fr. laverV ‘to wash’ > lavableA ‘washable’), while prototypical compounding involves two lexemes (e.g., Eng. rainN + fallV > rainfallN). The description of these prototypical phenomena provides a starting point for the description of other types of constituents and word-formation processes. There are indeed at least two phenomena which do not meet this description, namely, combining forms (henceforth CFs) and affixoids, and which therefore pose an interesting challenge to linguistic description, be it synchronic or diachronic. The distinction between combining forms and affixoids is not easy to establish and the definitions are often confusing, but productivity is a good criterion to distinguish them from each other, even if it does not answer all the questions raised by bound forms. In the literature, the notions of CF and affixoid are not unanimously agreed upon, especially that of affixoid. Yet this article stresses that they enable us to highlight, and even conceptualize, the gradual nature of linguistic phenomena, whether from a synchronic or a diachronic point of view.

Neville's and Romberg's processes: a fresh appraisal with extensions

1968 ◽  
Vol 263 (1144) ◽  
pp. 525-562 ◽  
Keyword(s):  
Power Series ◽  
Truncation Error ◽  
Point Of View ◽  
The Other ◽  
Matrix Formulation ◽  
Rounding Errors ◽  
Numerical Examples ◽  
Truncation Errors ◽  
Wide Range ◽  
Romberg Integration

In this paper Neville’s process for the repetitive linear combination of numerical estimates is re-examined and exhibited as a process for term-by-term elimination of error, expressed as a power series; this point of view immediately suggests a wide range of applications—other than interpolation, for which the process was originally developed, and which is barely mentioned in this paper—for example, to the evaluation of finite or infinite integrals in one or more variables, to the evaluation of sums, etc. A matrix formulation is also developed, suggesting further extensions, for example, to the evaluation of limits, derivatives, sums of series with alternating signs, and so on. It is seen also that Neville’s process may be readily applied in Romberg Integration; each suggests extensions of the other. Several numerical examples exhibit various applications, and are accompanied by comments on the behaviour of truncation and rounding errors as exhibited in each Neville tableau, to show how these provide evidence of progress in the improvement of the approximation, and internal numerical evidence of the nature of the truncation error. A fuller and more connected account of the behaviour of truncation errors and rounding errors is given in a later section, and suggestions are also made for choosing suitable specific original estimates, i.e. for choosing suitable tabular arguments in the elimination variable, in order to produce results as precise and accurate as possible.

Software Measurement

2011 ◽  
pp. 191-223
Author(s):  
Fabrizio Fioravanti
Keyword(s):  
Software Engineering ◽  
Software Metrics ◽  
Point Of View ◽  
The Other ◽  
Effort Estimation ◽  
Physical Point ◽  
Software Complexity ◽  
Engineering Measure ◽  
Qualitative Characteristics ◽  
Quality In Use

The problem of measurement in software engineering has been addressed by many authors, and one of the most common questions is, “Can we learn from measurement in physics and can we transform this to software engineering measurement?” (Zuse, 1997, 1998). An engineering measure, from the physical point of view, is relevant if it can quantify the object under measurement, since qualitative measures usually are considered too coarse. The problem arises when we shift this concept in software engineering, where nearly all the possible measurements are qualitative ones. All of the characteristics defined by ISO9126 (1991) are qualitative and not directly related to precise physical or tangible phenomena. On the other hand, a wide skepticism of using numerical values is diffused, because it can be hard to give the requested semantic to the number. Metrics, that are the measures performed on code, can be split into two categories: metrics for software complexity/size measurement and effort estimation, and metrics for qualitative characteristics evaluation. In the first part of the chapter, the former type of metrics is discussed, while in the second part, a general overview of quality in use by metrics will be performed. Apart from this general distinction, a more accurate taxonomy of the software metrics is reported in order to classify them on the basis of the applicability field in which they can be adopted.

The Nature of Theatre Dialogue

1986 ◽  
Vol 2 (8) ◽  
pp. 364-368
Author(s):  
Arnold Wesker
Keyword(s):  
International Association ◽  
Point Of View ◽  
The Other ◽  
Original Series ◽  
Biennial Conference ◽  
British Drama ◽  
Wide Range ◽  
Conscious Process ◽  
Critical Theorist ◽  
Constituent Elements

‘What makes one sentence into a line of poetry and another sentence dull and lifeless?’ This was one of the questions Arnold Wesker set out to answer from the point-of-view of the practising playwright rather than the critical theorist, when he delivered the following pape; to the biennial conference of the International Association of Theatre Critics in Rome in 1985. He examines the constituent elements of stage dialogue in supposdly ‘raistic’ drama and th rigorous if not always conscious process of artistic selection and shaping diotated, in his own practice, by the natur of the originating experence. He illustrates his argument with extracts from his own works. including his most recently staged play in London, Annie Wobbler – the first in a now-completed cycle of four plays for on woman of which Four Portraits, Yardsal, and Whatever Happened to Betty Lemon? are the other parts. A frequent contributor to the original series of Theatre Quarterly, Arnold Wesker's earliest works, the plays of the ‘Wesker Trilogy’ and The kitchen, were milestones in the creatior of the ‘now British drama’ of the late fifties, and he has continuec to write for the theatre in a wide range of styles – which have been known to disturb the ‘expectations of realism’ of some of the critics he was here addressing…

Can the Academic Self-Concept be Positive and Realistic?

2005 ◽  
Vol 19 (3) ◽  
pp. 129-132 ◽  
Author(s):  
Reimer Kornmann
Keyword(s):  
Academic Performance ◽  
Opposite Effect ◽  
Self Esteem ◽  
Point Of View ◽  
The Other ◽  
Self Concept ◽  
High Ability ◽  
Self Image ◽  
Other Hand

Summary: My comment is basically restricted to the situation in which less-able students find themselves and refers only to literature in German. From this point of view I am basically able to confirm Marsh's results. It must, however, be said that with less-able pupils the opposite effect can be found: Levels of self-esteem in these pupils are raised, at least temporarily, by separate instruction, academic performance however drops; combined instruction, on the other hand, leads to improved academic performance, while levels of self-esteem drop. Apparently, the positive self-image of less-able pupils who receive separate instruction does not bring about the potential enhancement of academic performance one might expect from high-ability pupils receiving separate instruction. To resolve the dilemma, it is proposed that individual progress in learning be accentuated, and that comparisons with others be dispensed with. This fosters a self-image that can in equal measure be realistic and optimistic.

Colorimetric research of self-luminous objects in software and hardware environments by the method of multidimensional scales implementation

2020 ◽  
pp. 43-50
Author(s):  
Yauheniya N. Saukova
Keyword(s):  
Metrological Traceability ◽  
Point Of View ◽  
Intermediate Precision ◽  
Technical Vision ◽  
Wide Range ◽  
Chromaticity Coordinates ◽  
Unity Of Measurements ◽  
Software And Hardware ◽  
Luminous Objects ◽  
Reference Samples

It is shown that the issues of metrological traceability for extended self-luminous objects with a wide range of brightness have not yet been resolved, since the rank scales of embedded systems are used for processing digital images. For such scales, there is no “fixed” unit, which does not allow you to get reliable results and ensure the unity of measurements. An experiment is described to evaluate the accuracy of determining the intensity (coordinates) of the color of self-luminous objects. In terms of repeatability and intermediate precision compared to the reference measurement method, the color and chromaticity coordinates of self-luminous objects (reference samples) were determined by their multiple digital registration using technical vision systems. The possibilities of the developed methodology for colorimetric studies in hardware and software environments from the point of view of constructing a multidimensional conditional scale are determined.

2D Color-Intensity Representation of Ultrasonic Thickness Gauge Measurements

2020 ◽  
pp. 1192-1198
Author(s):  
M.S. Mohammad ◽  
Tibebe Tesfaye ◽  
Kim Ki-Seong
Keyword(s):  
Cost Effective ◽  
The Other ◽  
Thickness Gauge ◽  
Color Intensity ◽  
Digital Readout ◽  
Flat Surfaces ◽  
Video Cameras ◽  
Wide Range ◽  
Cost Effective Alternative ◽  
Ultrasonic Thickness

Ultrasonic thickness gauges are easy to operate and reliable, and can be used to measure a wide range of thicknesses and inspect all engineering materials. Supplementing the simple ultrasonic thickness gauges that present results in either a digital readout or as an A-scan with systems that enable correlating the measured values to their positions on the inspected surface to produce a two-dimensional (2D) thickness representation can extend their benefits and provide a cost-effective alternative to expensive advanced C-scan machines. In previous work, the authors introduced a system for the positioning and mapping of the values measured by the ultrasonic thickness gauges and flaw detectors (Tesfaye et al. 2019). The system is an alternative to the systems that use mechanical scanners, encoders, and sophisticated UT machines. It used a camera to record the probe’s movement and a projected laser grid obtained by a laser pattern generator to locate the probe on the inspected surface. In this paper, a novel system is proposed to be applied to flat surfaces, in addition to overcoming the other limitations posed due to the use of the laser projection. The proposed system uses two video cameras, one to monitor the probe’s movement on the inspected surface and the other to capture the corresponding digital readout of the thickness gauge. The acquired images of the probe’s position and thickness gauge readout are processed to plot the measured data in a 2D color-coded map. The system is meant to be simpler and more effective than the previous development.

Birlikte Yaşama Kültürü Çerçevesinde Avrupa Birliği ve Türkiye Politikaları: Suriyelilere Yönelik Tutumun Sultanbeyli Örneği Üzerinden Değerlendirilmesi

2017 ◽  
Vol 4 (1) ◽  
pp. 41-61
Author(s):  
Pelin Sönmez ◽  
Abulfaz Süleymanov
Keyword(s):  
Civil Wars ◽  
Large Scale ◽  
Social Acceptance ◽  
Point Of View ◽  
The Other ◽  
Syrian Refugees ◽  
The European Union ◽  
International Protection ◽  
Legal Structure ◽  
Turkish People

Türkiye, Cumhuriyet tarihinin en yoğun zorunlu göç dalgasını 2011 yılından bu yana süren Suriye Savaşı ile yaşamaktadır. Suriye vatandaşlarının geçici koruma statüsü altında Türkiye toplumuna her açıdan entegrasyonları günümüzün ve geleceğin politika öncelikleri arasında düşünülmelidir. Öte yandan ülkeye kabul edilen sığınmacıların kendi kültürel kimliğini kaybetmeden içinde yaşadığı ev sahibi topluma uyumu, ortak yaşam kültürünün gelişmesi açısından önem arz etmektedir. Bu makalede, "misafir" olarak kabul edilen Suriyeli vatandaşların Türk toplumunca kabul edilmeleri ve dışlanma risklerinin azaltılmasına yönelik devlet politikaları ortaya konularak, üye ve aday ülkelere göçmenlerin dışlanmasını önlemek için Avrupa Birliği (AB) tarafından sunulan hukuki yapı ve kamu hizmeti inisiyatifleri incelenmekte, birlikte yaşam kültürü çerçevesinde Suriyeli vatandaşlara yönelik  toplumsal kabul düzeyleri ele alınmaktadır. Çalışma iki ana bölümden oluşmaktadır: göçmen ve sığınmacılara karşı toplumsal dışlanmayı engellemek için benimsenen yasa ve uygulamaların etkisi ve İstanbul-Sultanbeyli bölgesinde Suriyeli sığınmacılarla ilgili toplumsal algı çalışmasının sonuçları. Bölgede ikamet eden Suriyelilere yönelik toplumsal kabul düzeyinin yüksek olduğu görülürken, halkın Suriyelileri kendilerine  kültürel ve dini olarak yakın hissetmesi toplumsal kabul düzeyini olumlu etkilemektedir. ABSTRACT IN ENGLISHAn evaluation of the European Union and Turkish policies regarding the culture of living togetherThis article aims to determine the level of social acceptance towards Syrians within the context of cohabitation culture by evaluating EU’s legal structure and public service initiatives in order to prevent Syrian refugees from being excluded in member and candidate countries and by revealing government policies on acceptance of Syrians as “guest” by Turkish society and minimizing the exclusion risks of them. This article consists of two main parts, one of which is based on the effects of law and practices preventing refugees and asylum seekers from social exclusion, and the other is on the results of social perception on Syrians in Sultanbeyli district of Istanbul. At the end of 5-years taking in Syrian War, it is obvious that most of more than 3 million Syrian with unregistered ones in Turkey are “here to stay”. From this point of view, the primary scope of policies should be specified in order to remove side effects of refugee phenomenon seen as weighty matter by bottoming out the exclusion towards those people. To avoid possible large-scale conflicts or civil wars in the future, the struggle with exclusion phenomenon plays a crucial role regarding Turkey’s sociological situation and developing policies. In the meaning of forming a model for Turkey, a subtitle in this article is about public services for European-wide legal acquis and practices carried out since 1970s in order to prevent any exclusion from the society. On the other hand, other subtitles are about legal infrastructure and practices like Common European Asylum and Immigration Policies presented in 2005, and Law on Foreigners and International Protection introduced in 2013. In the last part of the article, the results of a field survey carried out in a district of Istanbul were used to analyze the exclusion towards refugees in Turkey. A face-to-face survey was randomly conducted with 200 settled refugees in Sultanbeyli district of Istanbul, and their perceptions towards Syrian people under temporary protection were evaluated. According to the results, the level of acceptance for Syrians living in this district seems relatively high. The fact that Turkish people living in the same district feel close to Syrian refugees culturally and religiously affect their perception in a positive way: however, it is strikingly seen and understood that local residents cop an attitude on the refugees’ becoming Turkish citizens.

COMBINATORIAL POLYNOMIALLY COMPUTABLE CHARACTERISTICS OF SUBSTITUTIONS AND THEIR PROPERTIES

2020 ◽  
Vol 7 (2) ◽  
pp. 34-41
Author(s):  
VLADIMIR NIKONOV ◽  
◽  
ANTON ZOBOV ◽  
Keyword(s):  
Mathematical Expectation ◽  
Point Of View ◽  
Small Range ◽  
Computational Point ◽  
Wide Range ◽  
Bijective Function ◽  
The Difference ◽  
Element Base ◽  
Selection Of

The construction and selection of a suitable bijective function, that is, substitution, is now becoming an important applied task, particularly for building block encryption systems. Many articles have suggested using different approaches to determining the quality of substitution, but most of them are highly computationally complex. The solution of this problem will significantly expand the range of methods for constructing and analyzing scheme in information protection systems. The purpose of research is to find easily measurable characteristics of substitutions, allowing to evaluate their quality, and also measures of the proximity of a particular substitutions to a random one, or its distance from it. For this purpose, several characteristics were proposed in this work: difference and polynomial, and their mathematical expectation was found, as well as variance for the difference characteristic. This allows us to make a conclusion about its quality by comparing the result of calculating the characteristic for a particular substitution with the calculated mathematical expectation. From a computational point of view, the thesises of the article are of exceptional interest due to the simplicity of the algorithm for quantifying the quality of bijective function substitutions. By its nature, the operation of calculating the difference characteristic carries out a simple summation of integer terms in a fixed and small range. Such an operation, both in the modern and in the prospective element base, is embedded in the logic of a wide range of functional elements, especially when implementing computational actions in the optical range, or on other carriers related to the field of nanotechnology.

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