Stable Property Clusters and Their Grounds

2017 ◽  
Vol 84 (5) ◽  
pp. 944-955 ◽  
Author(s):  
Eduardo J. Martinez
Keyword(s):  
Stable Property

The Myth of Rigorous Accounting Research

2014 ◽  
Vol 28 (4) ◽  
pp. 869-887 ◽  
Author(s):  
Paul F. Williams
Keyword(s):  
Statistical Models ◽  
Policy Recommendations ◽  
Stable Property ◽  
Accounting Research

SYNOPSIS In this brief paper, I provide an argument that the rigor that allegedly characterizes contemporary mainstream accounting research is a myth. Expanding on arguments provided by West (2003), Gillies (2004), and Williams (1989), I show that the numbers utilized extensively to construct the statistical models that are the central defining feature of rigorous accounting research are, in many cases, not adequate to the task. These numbers are operational numbers that cannot be construed as measures or quantities of any kind of stable property. Constructing elaborate calculative models using operational numbers leads to equations whose results are not clearly decipherable. The rigorous nature of certain preferred forms of accounting research is, thus, largely a matter of appearance and not a substantive quality of the research mode that we habitually label “rigorous.” Thus, the policy recommendations implied by the results of rigorous accounting research may be viewed with considerable skepticism.

On Lipschitz behaviour of some generalized derivatives

2013 ◽  
Vol 63 (3) ◽  
Author(s):  
Dušan Bednařík ◽  
Karel Pastor
Keyword(s):  
Reference Point ◽  
Clarke Subdifferential ◽  
Generalized Derivatives ◽  
Lipschitz Property ◽  
Dini Derivative ◽  
Stable Property ◽  
Nonsmooth Functions ◽  
Clarke Derivative

AbstractThe aim of the present paper is to compare various forms of stable properties of nonsmooth functions at some points. By stable property we mean the Lipschitz property of some generalized derivatives related only to the reference point. Namely we compare Lipschitz behaviour of lower Clarke derivative, lower Dini derivative and calmness of Clarke subdifferential. In this way, we continue our study of λ-stable functions.

scholarly journals Comparison of four methods of differential typing of isolates ofShigella sonnei

1981 ◽  
Vol 87 (3) ◽  
pp. 339-355 ◽  
Author(s):  
S. Helgason ◽  
D. C. Old
Keyword(s):  
Antibiotic Sensitivity ◽  
The Other ◽  
Drug Resistant ◽  
Typing Method ◽  
Stable Property ◽  
Discriminating Power ◽  
Sensitivity Tests ◽  
The Stability

SummaryAn epidemiological study of Sonne dysentery in Dundee during the years 1971–6 was made by examining, in respect of 1420 isolates ofShigella sonnei, the discriminating power of colicine typing, antibiogram testing, biotyping and resistotyping and the stability of the markers they provided.Colicine typing identified nine colicine types, including four not previously described. However, because types 4 and 4 var., determined bycolIb, and type U, producing no colicines, accounted for 96 % of the isolates, discrimination with colicine typing was poor. In antibiotic sensitivity tests, 13 different antibiogram patterns were noted. Less than 1 % of the isolates were sensitive to all of the eight antibiotics tested; most were multiply drug-resistant. Resistance to kanamycin, neomycin and paromomycin (KNP) was apparently due to a single resistance determinant, widely distributed in a majority (53%) of the isolates. When definitive times were chosen for reading each biotyping test, only maltose and rhamnose of the 13 ‘sugars’ tested differentiated isolates into prompt- and late-fermenting types. Though the ability to ferment rhamnose was a stable property, it discriminated only 1·5% of the minority, late-fermenting type. Resistotyping with six chemicals discriminated eight epidemiologically valid resistotypes, including three new types. However, 93 % of the isolates belonged to only three resistotypes.Analysis of the data for isolates from 286 epidemiologically distinct episodes showed that the variability of colicine and antibiogram characters, found among isolates within, respectively, 40 and 28 % of the episodes, was generally associated with loss or gain of a plasmid (‘colIb-KNP’) which determined production of colicine Ib and KNP resistance. These characters varied bothin vivoandin vitro. Variability of resistotype characters, on the other hand, was observed in only 28 (9%) episodes, 14 of which possibly represented examples of mixed or sequential infections.For accurate epidemiological tracing of strains ofSh. sonneiin a community, resistotyping, the technique showing the greatest discrimination and least variability of the four tested, should be included as the principal typing method.

scholarly journals The stable property of projective dimension

2019 ◽  
Vol 18 (12) ◽  
pp. 1950224
Author(s):  
Somayeh Bandari ◽  
Raheleh Jafari
Keyword(s):  
Projective Dimension ◽  
Monomial Ideals ◽  
Prime Ideals ◽  
Stable Property ◽  
Polymatroidal Ideals

We introduce the concept of monomial ideals with stable projective dimension, as a generalization of the Cohen–Macaulay property. Indeed, we study the class of monomial ideals [Formula: see text], whose projective dimension is stable under monomial localizations at monomial prime ideals [Formula: see text], with [Formula: see text]. We study the relations between this property and other sorts of Cohen–Macaulayness. Finally, we characterize some classes of polymatroidal ideals with stable projective dimension.

Photophysical Property Investigation of Nanometer Porphyrin Oligomer

2011 ◽  
Vol 335-336 ◽  
pp. 1103-1106
Author(s):  
Ying Yan Shi
Keyword(s):  
Molecular Structure ◽  
Elemental Analysis ◽  
Photophysical Property ◽  
Fluorescence Property ◽  
Stable Property ◽  
H Nmr ◽  
Oligomer Formation ◽  
Heat Stable ◽  
The Matrix

In this paper, ω-bromopropylporphyrin ether was firstly synthesized using 1,3-dibromopropane as bridge-linked group and 5-(4-hydroxyphenyl)-10,15,20-triphenylporphyrin (H2MHTPP) as the matrix. The resulting compound was then reacted with 5,15-di(4- hydroxyphenyl)-10,20-diphenyl porphyrin (trans-H2DHDPP) to give a new title nanometer porphyrin oligomer. Characterization were made by the methods of elemental analysis, UV-vis, IR, 1H NMR and XRD. Has studied the crystalline ,the fluorescence property and the heat-stable property of porphyrin monomer and porphyrin oligomer. The research discovered that the crystalline,the fluorescence property and the heat-stable property can have the very big change along with the porphyrin peripheral substitution groups as well as the oligomer formation. And the function of difference kinds of solvent and the porphyrin molecular structure symmetry also can have the very tremendous influence to the crystalline,the fluorescence property and the heat-stable property.

scholarly journals $S$-regularity and the corona factorization property

2006 ◽  
Vol 99 (2) ◽  
pp. 204 ◽  
Author(s):  
D. Kucerovsky ◽  
P. W. Ng
Keyword(s):  
Fundamental Property ◽  
Sufficient Condition ◽  
Factorization Property ◽  
Stable Property ◽  
C Algebra ◽  
C Algebras ◽  
The Third ◽  
Explicit Reference ◽  
Stable Algebra ◽  
Extension Algebra

Stability is an important and fundamental property of $C^{*}$-algebras. Given a short exact sequence of $C^{*}$-algebras $0\longrightarrow B\longrightarrow E\longrightarrow A\longrightarrow 0$ where the ends are stable, the middle algebra may or may not be stable. We say that the first algebra, $B$, is $S$-regular if every extension of $B$ by a stable algebra $A$ has a stable extension algebra, $E$. Rördam has given a sufficient condition for $S$-regularity. We define a new condition, weaker than Rördam's, which we call the corona factorization property, and we show that the corona factorization property implies $S$-regularity. The corona factorization property originated in a study of the Kasparov $KK^1(A,B)$ group of extensions, however, we obtain our results without explicit reference to $KK$-theory. Our main result is that for a separable stable $C^{*}$-algebra $B$ the first two of the following properties (which we define later) are equivalent, and both imply the third. With additional hypotheses on the $C^{*}$-algebra, all three properties are equivalent. $B$ has the corona factorization property. Stability is a stable property for full hereditary subalgebras of $B$. $B$ is $S$-regular. We also show that extensions of separable stable $C^{*}$-algebras with the corona factorization property give extension algebras with the corona factorization property, extending the results of [9].

Cancer

2018 ◽  
Author(s):  
Anya Plutynski
Keyword(s):  
Cancer Research ◽  
Natural Kind ◽  
Natural Kinds ◽  
Molecular Subtyping ◽  
Stable Property ◽  
Scientific Kinds ◽  
False Assumption ◽  
Homeostatic Property Cluster ◽  
Cluster View

Is cancer one or many? If many, how many diseases is cancer, exactly? I argue that this question makes a false assumption; there is no single “natural” classificatory scheme for cancer. Rather, there are many ways to classify cancers, which serve different predictive and explanatory goals. I consider two philosophers’ views concerning whether cancer is a natural kind, that of Khalidi, who argues that cancer is the closest any scientific kind comes to a homeostatic property cluster kind, and that of Lange, whose conclusion is the opposite of Khalidi’s; he argues that cancer is at best a “kludge” and that advances in molecular subtyping of cancer hail the “end of diseases” as natural kinds. I consider several alternative accounts of natural or “scientific” kinds, the “simple causal view,” the “stable property cluster” view, and “scientific kinds,” and argue that the diverse aims of cancer research require us to embrace a much more pluralistic view.

Analytical versus numerical solutions of the nonlinear fractional time–space telegraph equation

2021 ◽  
pp. 2150324
Author(s):  
Mostafa M. A. Khater ◽  
Dianchen Lu
Keyword(s):  
Analytical Solutions ◽  
Electromagnetic Waves ◽  
Numerical Scheme ◽  
Numerical Solutions ◽  
Telegraph Equation ◽  
Scatter Matrix ◽  
B Spline ◽  
Stable Property ◽  
Time Space ◽  
Matrix Distribution

In this paper, the stable analytical solutions’ accuracy of the nonlinear fractional nonlinear time–space telegraph (FNLTST) equation is investigated along with applying the trigonometric-quantic-B-spline (TQBS) method. This investigation depends on using the obtained analytical solutions to get the initial and boundary conditions that allow applying the numerical scheme in an easy and smooth way. Additionally, this paper aims to investigate the accuracy of the obtained analytical solutions after checking their stable property through using the properties of the Hamiltonian system. The considered model for this study is formulated by Oliver Heaviside in 1880 to define the advanced or voltage spectrum of electrified transmission, with day-to-day distances from the electrified communication or the application of electromagnetic waves. The matching between the analytical and numerical solutions is explained by some distinct sketches such as two-dimensional, scatter matrix, distribution, spline connected, bar normal, filling with two colors plots.

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