scholarly journals Dentin reactions to caries are misinterpreted by histological “gold standards”

F1000Research ◽  
2014 ◽  
Vol 3 ◽  
pp. 13 ◽  
Author(s):  
Priscila Florentino Silva ◽  
Danilo Augusto de Holanda Ferreira ◽  
Kássia Regina Simões Meira ◽  
Franklin Delano Soares Forte ◽  
Ana Maria Barros Chaves ◽  
...  
Keyword(s):  
Polarized Light ◽  
Occlusal Caries ◽  
Dentin Mineralization ◽  
The One ◽  
Relationship Of ◽  
The Relationship ◽  
Caries Lesions ◽  
Gold Standards

Dentin reactions to caries, crucial for pathogenesis and for the determination of the severity of caries lesions, are believed to be reasonably detected by stereomicroscopy (SM) and polarized light microscopy in quinoline (PLMQ), but accuracies are not available. Here, stereomicroscopy of wet (SW) and dry (SD) ground sections of natural occlusal caries lesions resulted in moderate (0.7, for normal dentin) and low accuracies (< 0.6, for carious and sclerotic dentin) as validated by contrast-corrected microradiography. Accuracies of PLMQ were moderate for both normal (0.71) and carious dentin (0.71). The hypothesis that detection of dentin reactions by SM and PLMQ would be influenced by the contrast quality of micrographic images was rejected. Dentin reactions were scored by SW, SD, PLMQ, and three types of microradiographic images with varying contrast qualities and each technique was compared against the one that resulted in the highest number of scores for each dentin reaction. Large differences resulted, mainly related to the detection of sclerotic dentin by both SW and SD, and normal and carious dentin by PLMQ. It is concluded that contrast-corrected microradiography should be preferred as the gold standard and SM and PLMQ should be avoided, but the relationship of PLMQ with dentin mineralization deserves further investigation.

III.—The Place in Nature of the Tasmanian Aboriginal as deduced from a Study of his Calvarium.—Part I. His Relations to the Anthropoid Apes, Pithecanthropus, Homo primigenius, Homo fossilis, and Homo sapiens

1912 ◽  
Vol 31 ◽  
pp. 41-69 ◽  
Author(s):  
Richard J. A. Berry ◽  
A. W. D. Robertson
Keyword(s):  
Royal Society ◽  
Homo Sapiens ◽  
The Other ◽  
Present Material ◽  
Australian Aboriginal ◽  
The World ◽  
The One ◽  
Relationship Of ◽  
The Relationship

IN our communication to the Royal Society of Victoria of the 11th March, 1909 (1), describing our recent discovery of forty-two Tasmanian crania hitherto quite unknown to the world of science, we stated that “one of the earliest purposes to which it is proposed to utilise the present material is the determination of the relationship of the Tasmanian to the anthropoids and primitive man on the one hand, and to the Australian aboriginal on the other hand. Schwalbe's study of Pithecanthropus erectus (2) may serve as a basis for the former purpose, and Klaatsch's recent work (3) for the latter, though it must be remembered that innumerable authors have contributed to both subjects.” The present work is the fulfilment of the first part of this undertaking, namely, the determination of the relationship of the Tasmanian to the anthropoids and primitive man.

Retreat from the Male: Catullus 62 and Sappho's Erotic Flowers

Ramus ◽  
1977 ◽  
Vol 6 (2) ◽  
pp. 83-102 ◽  
Author(s):  
Eva Stehle Stigers
Keyword(s):  
Sexual Intimacy ◽  
Short Life ◽  
Narcissistic Personality ◽  
The Stability ◽  
The One ◽  
Relationship Of ◽  
The Relationship ◽  
The Ideal

Catullus described a full emotional circle in his short life from delight in unconstrained aesthetic sensuality free of socially-defined patterns (cc. 5, 6, 13 for example) to longing for a stable bond in the relationship of man to woman. He pictured such a bond as placed within the traditional Roman frame of marriage and home, but cast in a personal mold; he wanted to preserve his aesthetic and sensual response to a woman while combining it somehow with the stability and intimacy appropriate to friendship (amare and bene velle). Poems 72 and 87, for instance, directly express the ideal in acknowledging its absence from Catullus' relations with Lesbia.Catullus liked to feel that the possibility of complete union was what he offered Lesbia. Perhaps it was his inability to fashion a compelling synthesis of sexual intimacy and friendship with her that led him to write a series of poems exploring attempts, mainly failures, at full reciprocal love. The successful attempts are idyllic or mythic (Septimius and Acme, Peleus and Thetis, neither unambiguously positive). The failures come, in Catullus' portrayal, when union founders on the obstacle of the narcissistic personality, the man or woman unable to forfeit autonomy, desirous of holding others in thrall without being himself held. Catullus' highly developed sensitivity to narcissism must be a reaction to its prominence in the character of a certain kind of sexually attractive individual, the one who is alluring but uncapturable, the kind of woman, like Lesbia, with whom Catullus sought union. Catullus conveys the quality of narcissism in such a character in part through the image of the flower (appropriately, considering the source of the modern name for it).

Test and Research to the Dank Ratio of Woven Filtering Fabric

2011 ◽  
Vol 332-334 ◽  
pp. 916-919
Author(s):  
Gui Fen Yao ◽  
Jian Hua Yin ◽  
Hai Wen Liu
Keyword(s):  
Water Permeability ◽  
Performance Indicator ◽  
Woven Fabrics ◽  
National Standards ◽  
Test Results ◽  
Quality Of Water ◽  
Relationship Of ◽  
The Relationship

No matter for clothes fabric or industry fabric, the water permeability is an important performance indicator. In order to explore relationship of the water permeability of woven filtering fabrics with the fabric structure parameters, we design sixteen fabric. According to the national standards of determination of water permeability of woven filtering fabric, we test the dank ratio of the design fabric. In this paper we analysis the water permeability and structure parameter of woven filtering fabric with test the quality of water on some time through woven fabrics. We calculated the dank ratio from the water permeable quality and other parameters. The results indicate that, the effect of fabric texture on the dank ratio of woven fabrics is that the dank ratio of the plain weave is the smallest and the satin weave is the biggest. In addition, the relationship between overall covering factor and water permeability showed that the water permeability decreases along with the overall covering factor increasing. A linear regression equation between dank ratio and overall covering factor is get from the test results. In order to get big dank ratio, we should produce fabric with satin weave and lower overall covering factor.

scholarly journals Establishing Relationship of Porosity and Strength of Fibre Reinforced Concrete

2019 ◽  
Vol 9 (2S2) ◽  
pp. 82-85
Keyword(s):  
Compressive Strength ◽  
Reinforced Concrete ◽  
Fibre Reinforced Concrete ◽  
Steel Fibres ◽  
The One ◽  
Strength And Durability ◽  
Relationship Of ◽  
The Relationship

There are numerous factors that affect the performance of concrete in terms of strength and durability aspects. Amongst, the pores in the concrete are the one which is playing a foremost role in deciding strength and durability characteristics. The presences of pores in the concrete are due to inferior quality of concrete ingredients, lack of w/c ratio, improper compaction, poor workmanship etc. Many past studies reveal that the presence of fillers materials may reduce the pores on the concrete. But at the same time, the strength and durability should improve a lot. Under these circumstances, the presence of steel fibres in the concrete will give a better solution to arrest the pores and furnish desired results in all aspects. This study is made an attempt to establish the relationship between porosity and compressive strength on the various proportions of steel fibres of M20 and M40 grade concrete

scholarly journals The impact of the institutional environment on the shadow economy

2018 ◽  
Vol 68 (1) ◽  
pp. 115-133 ◽  
Author(s):  
Tural Makhmudov ◽  
Maria Konovalova ◽  
Olga Kuzmina ◽  
Natalia Persteneva
Keyword(s):  
Shadow Economy ◽  
Institutional Environment ◽  
Tax Burden ◽  
Economic Policies ◽  
Development Levels ◽  
The One ◽  
Relationship Of ◽  
The Impact ◽  
The Relationship

This article aims to explore the relationship of the shadow economy with the institutional environment and develop practical recommendations for government policies around the world, and particularly in Russia. The urgency of the issue under research is caused by the existing need to study the shadow economy in order to find ways to reduce its scale and level out its negative externalities. Despite the fact that most of the papers focus on tax burden as a fundamental determinant of the shadow economy, the authors of this article believe that institutional tools can expand the boundaries of research on the content of the shadow economy as an economic category. Statistical analysis of 105 countries with different development levels revealed a stronger correlation between the quality of institutions and the size of the shadow economy than the one between total tax burden and the size of the shadow economy. The findings of this article can be useful in developing state strategies for combating the shadow economy and carrying out economic policies of the state as a whole.

Using the alveograph in developing requirements for the quality of flour for wafer sheet production

2020 ◽  
Vol 29 (12) ◽  
pp. 52-58
Author(s):  
E.P. Meleshkina ◽  
◽  
S.N. Kolomiets ◽  
A.S. Cheskidova ◽  
◽  
...  
Keyword(s):  
Rheological Properties ◽  
Quality Indicators ◽  
Wheat Flour ◽  
Mathematical Statistics ◽  
Intended Purpose ◽  
The Future ◽  
Relationship Of ◽  
The Relationship

Objectively and reliably determined indicators of rheological properties of the dough were identified using the alveograph device to create a system of classifications of wheat and flour from it for the intended purpose in the future. The analysis of the relationship of standardized quality indicators, as well as newly developed indicators for identifying them, differentiating the quality of wheat flour for the intended purpose, i.e. for finished products. To do this, we use mathematical statistics methods.

Management of Economics and State "Bottom"

2020 ◽  
Vol 17 (6) ◽  
pp. 76-91
Author(s):  
E. D. Solozhentsev
Keyword(s):  
Quality Of Life ◽  
Artificial Intelligence ◽  
Probabilistic Models ◽  
Human Life ◽  
Special Software ◽  
Human Quality ◽  
Relationship Of ◽  
The Relationship

The scientific problem of economics “Managing the quality of human life” is formulated on the basis of artificial intelligence, algebra of logic and logical-probabilistic calculus. Managing the quality of human life is represented by managing the processes of his treatment, training and decision making. Events in these processes and the corresponding logical variables relate to the behavior of a person, other persons and infrastructure. The processes of the quality of human life are modeled, analyzed and managed with the participation of the person himself. Scenarios and structural, logical and probabilistic models of managing the quality of human life are given. Special software for quality management is described. The relationship of human quality of life and the digital economy is examined. We consider the role of public opinion in the management of the “bottom” based on the synthesis of many studies on the management of the economics and the state. The bottom management is also feedback from the top management.

Calculating the aerodynamics of vertical axis wind turbines

2012 ◽  
Vol 34 (3) ◽  
pp. 169-184 ◽  
Author(s):  
Hoang Thi Bich Ngoc
Keyword(s):  
Wind Turbine ◽  
Incidence Angle ◽  
Vertical Axis ◽  
Rotor Blades ◽  
Vertical Axis Wind Turbine ◽  
Horizontal Axis Wind Turbine ◽  
Velocity Triangle ◽  
Relationship Of ◽  
The Relationship

Vertical axis wind turbine technology has been applied last years, very long after horizontal axis wind turbine technology. Aerodynamic problems of vertical axis wind machines are discussible. An important problem is the determination of the incidence law in the interaction between wind and rotor blades. The focus of the work is to establish equations of the incidence depending on the blade azimuth, and to solve them. From these results, aerodynamic torques and power can be calculated. The incidence angle is a parameter of velocity triangle, and both the factors depend not only on the blade azimuth but also on the ratio of rotational speed and horizontal speed. The built computational program allows theoretically selecting the relationship of geometric parameters of wind turbine in accordance with requirements on power, wind speed and installation conditions.

Tire Treadwear — A Comprehensive Evaluation of the Factors: Generic Type, Aspect Ratio, Tread Pattern, and Tread Composition Part I: Introduction and Details on the Organization of the Program

1986 ◽  
Vol 14 (4) ◽  
pp. 201-218 ◽  
Author(s):  
A. G. Veith
Keyword(s):  
Aspect Ratio ◽  
Comprehensive Evaluation ◽  
Test Method ◽  
Interactive Effects ◽  
Data Analyses ◽  
Main Effect ◽  
Systematic Determination ◽  
Relationship Of ◽  
The Relationship

Abstract This four-part series of papers addresses the problem of systematic determination of the influence of several tire factors on tire treadwear. Both the main effect of each factor and some of their interactive effects are included. The program was also structured to evaluate the influence of some external-to-tire conditions on the relationship of tire factors to treadwear. Part I describes the experimental design used to evaluate the effects on treadwear of generic tire type, aspect ratio, tread pattern (groove or void level), type of pattern (straight rib or block), and tread compound. Construction procedures and precautions used to obtain a valid and functional test method are included. Two guiding principles to be used in the data analyses of Parts II and III are discussed. These are the fractional groove and void concept, to characterize tread pattern geometry, and a demonstration of the equivalence of wear rate for identical compounds on whole tread or multi-section tread tires.

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