ANTIREALISM AND CONSTRUCTIVISM: BROUWER’S WEAK COUNTEREXAMPLES

2012 ◽  
Vol 6 (1) ◽  
pp. 147-159
Author(s):  
CHARLES McCARTY

AbstractStrictly intuitionistic inferences are employed to demonstrate that three conditions—the existence of Brouwerian weak counterexamples to Test, the recognition condition, and the BHK interpretation of the logical signs—are together inconsistent. Therefore, if the logical signs in mathematical statements governed by the recognition condition are constructive in that they satisfy the clauses of the BHK, then every relevant instance of the classical principle Test is true intuitionistically, and the antirealistic critique of conventional logic, once thought to yield such weak counterexamples, is seen, in this instance, to fail.

1987 ◽  
Vol 24 (3) ◽  
pp. 231-240 ◽  
Author(s):  
Mark Byrd

The present experiment was designed to examine how the semantic memory store of previously acquired knowledge affects the ability of young and old adults to retain textual information. The participants were presented with a series of biographical passages and were told they concerned either a famous historical character or a fictitious character. In an immediate recognition test, both young and old adults were able to discriminate between test and distractor sentences. However, in the delayed recognition condition, older adults had considerable difficulty in differentiating between target and distractor sentences, particularly in the famous character story condition. It was thought that as the older adults' episodic memory for the story deteriorated, they were unable to discriminate successfully between their store of previously acquired knowledge and the recently learned textual information.


2014 ◽  
Vol 26 (4) ◽  
pp. 253-259 ◽  
Author(s):  
Linette Lawlor-Savage ◽  
Scott R. Sponheim ◽  
Vina M. Goghari

BackgroundThe ability to accurately judge facial expressions is important in social interactions. Individuals with bipolar disorder have been found to be impaired in emotion recognition; however, the specifics of the impairment are unclear. This study investigated whether facial emotion recognition difficulties in bipolar disorder reflect general cognitive, or emotion-specific, impairments. Impairment in the recognition of particular emotions and the role of processing speed in facial emotion recognition were also investigated.MethodsClinically stable bipolar patients (n = 17) and healthy controls (n = 50) judged five facial expressions in two presentation types, time-limited and self-paced. An age recognition condition was used as an experimental control.ResultsBipolar patients’ overall facial recognition ability was unimpaired. However, patients’ specific ability to judge happy expressions under time constraints was impaired.ConclusionsFindings suggest a deficit in happy emotion recognition impacted by processing speed. Given the limited sample size, further investigation with a larger patient sample is warranted.


1982 ◽  
Vol 37 (9) ◽  
pp. 1205-1215 ◽  
Author(s):  
C. Jochum ◽  
J. Gasteiger ◽  
I. Ugi

AbstractThe principle of minimum chemical distance (PMCD) is derived from the general theory of the BE- and R-matrices, and makes precise the vague classical “principle of minimum structure change”. In fact, the PMCD may be seen as the principle of minimum structure change in mathematical terms. It provides a quantitative measure of chemical similarity of isomeric molecular systems. Its applications lie in the fields of correlations of substructures, elucidation of reaction mechanisms, and evaluation of synthetic pathways as is illustrated by examples. The mathematical foundations of the computer assisted application of the PMCD are presented.


1997 ◽  
Vol 4 (3) ◽  
pp. 154-159 ◽  
Author(s):  
Karen B. Spangenberg ◽  
Scott Henderson ◽  
Mark T. Wagner

2006 ◽  
Vol 6 (2) ◽  
Author(s):  
Roberto Giambò ◽  
Fabio Giannoni ◽  
Paolo Piccione

AbstractWe review the classical Principle of the Least Action in a general context where the Hamilton functionH is possibly non-convex. We show how the van Groesen [6] principle follows as a particular case where H is hyperregular and of homogeneous type. Homogeneous scalar field spacetimes in spherical symmetry are derived as an application.


2018 ◽  
Vol 3 (2) ◽  
pp. 104-111
Author(s):  
Astiandini Hidayatullah ◽  
Sri Surjani Tjahjawati

This research was conducted to find out how the process of implementation of safety and health program in the production director detail part manufacturing division   PT Dirgantara Indonesia, this research also can be known about work productivity at PT Dirgantara Indonesia.  This research was conducted on 117  respondents who are employees of the production director detail part manufacturing division PT Dirgantara Indonesia. This study used primary data by using questionnaires and interviews also using secondary data obtained from books and journals. The classical principle test used for this research is normality test, heteroscedasticity test, and linearity test. The result is employee productivity in productivity direktorat production detail part manufacturing division PT Dirgantara Indonesia of 27.1% made by the implementation of health and safety programs as much as 72.9%. The result of hypothesis test shows that there is significant influence between the implementation of work safety program to the work productivity of the employees of the production directorate part manufacturing PT Dirgantara Indonesia.


The overall mechanical properties of a power-law viscous material, as weakened by an isotropic distribution of voids, or reinforced by rigid particles, are investigated; the overall stress potential being estimated from a variational principle recently developed by Talbot & Willis ( IMA J. appl. Math. 35, 39 (1985)). ‘Self-consistent’ estimates are generated by two alternative conditions which coincide for linear behaviour; the general superiority of one is demonstrated. A rigorous upper bound for the stress potential of the voided material is established, which reduces to the classical Hashin–Shtrikman bound in the particular case of linear constitutive behaviour. It always lies below the elementary ‘Voigt’ bound, which is obtained from the classical principle of minimum energy. Dual results, based on the strain-rate potential, are also obtained and discussed. Comparisons are made between previous estimates of overall properties and those obtained in this work.


1977 ◽  
Vol 7 (4) ◽  
pp. 745-754 ◽  
Author(s):  
Bill Anglin

On an act utilitarian view it is morally permissible if not obligatory to choose to perform an action which contributes as much as any other action to the total happiness (utility) of all those capable of enjoying happiness. As the view has just been stated, however, there is some question of how we are to understand the phrase “all those capable of enjoying happiness”. For even leaving aside the possibility that animals or spirits might be included, there is still the matter of the size of the population of humans “capable of enjoying happiness”. Furthermore, among our ethical decisions themselves are decisions which would cause a decrease or increase in population and which in perhaps even more specific ways determine the applicability of this phrase “all those capable of enjoying happiness”. According to the socalled classical or total utilitarian principle, the phrase in question is understood as describing some population whose existence will enable one to maximize the net amount of happiness. For on the classical principle what one is obligated to do is simply to maximize net happiness.


2021 ◽  
Vol 13 (6) ◽  
pp. 1201
Author(s):  
Wei Hua ◽  
Miaole Hou ◽  
Yunfei Qiao ◽  
Xuesheng Zhao ◽  
Shishuo Xu ◽  
...  

Grottoes, with caves and statues, are an important part of immovable heritage. Statues in a particular grotto setting are often similar in geometric form and artistic style, and identifying the similarity between these statues can help provide important references for value recognition, condition assessment, repair, and the virtual restoration of statues. Traditionally, such reference information mainly depended on expert empirical judgment, which is highly subjective, lacks quantitative analysis, and cannot provide effective scientific support for the virtual restoration of grotto statues. This paper presents a similarity index based approach for identifying similarities between grotto statues by studying 11 small Buddhist statues carved on the 18th cave in the Yungang Grottoes, located in Datong, China. The similarity index is determined according to the hash values calculated based on the pHash method using the orthophoto images of Buddhist statues to identify similar statues. Similar feature points between the identified statues are then matched using the Scale Invariant Feature Transform (SIFT) operator to support the repair and reconstruction of damaged statues. The experimental results show that the variation of similarity index values confirms the visual inspection of the statues’ appearance in the orthophotos. The additional analysis of three-dimensional (3D) point clouds also confirms that the similarity index based approach is accurate in the initial screening of similar grotto statues.


2021 ◽  
Vol 2131 (3) ◽  
pp. 032074
Author(s):  
A Korepanov ◽  
E Ronnov

Abstract The aim of the work is to develop a method for finding the resistance of a trimaran ship at the initial stages of design, depending on the geometric characteristics of the central hull, outriggers and their mutual position. The program of model tests in the experimental tank is characterized. Based on the analysis of the experimentally obtained data, the graphs of the resistance dependence on the Froude number for the trimaran ship model with the fore, central and stern arrangement of outriggers are presented. A graph of the outriggers’ location influence along the vessel length on its hydrodynamic resistance is also shown. A method for calculating the hydrodynamic resistance for a trimaran vessel at the stages of research design is proposed, which is an adjustment of a single-hull vessel model tests’ recalculation classical principle. One of the developed graphs of the residual drag coefficient dependence on the relative speed according to the Froude number for various central hull geometric characteristics of the vessel, outriggers and their relative position is presented. The analysis of serial model tests made it possible to establish the dependence of the trimaran ship resistance on the geometric characteristics of the central hull and outriggers, and their relative position relative to each other in this study. The method proposed in this work will make it possible to substantiate the best layout of outriggers when solving the problem of optimizing the design elements and characteristics of a trimaran at the research design stage.


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