XXVII.—The Dissipation of Energy in Torsionally Oscillating Wires of Brass and. other Materials, with the Effects produced on the Law of Torsional Oscillation by Change of Temperature, etc

1912 ◽  
Vol 31 ◽  
pp. 424-439
Author(s):  
J. B. Ritchie
Keyword(s):  
Initial Conditions ◽  
Torsional Oscillation ◽  
Previous Treatment ◽  
Torsional Oscillations ◽  
Iron Wire ◽  
Dissipation Of Energy ◽  
The Wire ◽  
The Law

In the determination of the law of decrease of torsional oscillations of an iron wire, when the range of oscillation is large in comparison with the palpable limits of elasticity, an equation of the formyn (x + a)= bhas been shown by Dr Peddie (Phil. Mag., July 1894) to give close representation of results where—y = the range of oscillation.x = the number of oscillations since the commencement of observations.n, a, b = quantities, constant for any one experiment, depending on the initial conditions of the experiment and the previous treatment of the wire.

XVIII.—On a Continued Investigation of the Application of the Law of Torsional Oscillation to Various Metals and Alloys

1914 ◽  
Vol 33 ◽  
pp. 183-193
Author(s):  
James B. Ritchie
Keyword(s):  
Empirical Equation ◽  
Large Range ◽  
Initial Conditions ◽  
Torsional Oscillation ◽  
Subsequent Treatment ◽  
Metals And Alloys ◽  
Torsional Oscillations ◽  
The Subject ◽  
The Law

This paper is a continuation of one already submitted to the Society, and published in their Proceedings.It showed that an equation of the form yn(x + a) = b could be applied to give close representation of results in the determination of the law of decrease of torsional oscillations of wires of different materials. This empirical equation, in which y represented the range of oscillation, x the number of oscillations since the commencement of observations, and n, a, and b constants for any one experiment, their numerical values depending upon the initial conditions of the wire and its subsequent treatment, was found to hold over a large range of oscillation for wires of many metals, and the present paper gives an account of further work on the subject.

scholarly journals XVIII.—On Torsional Oscillations of Wires

1897 ◽  
Vol 38 (3) ◽  
pp. 611-630
Author(s):  
W. Peddie
Keyword(s):  
Previous Treatment ◽  
Philosophical Magazine ◽  
Torsional Oscillations ◽  
The Wire ◽  
The Law ◽  
Image Position

About two years ago I communicated to this Society a paper on the above subject, which was printed in the Philosophical Magazine (1894). The object of the investigations therein discussed was the determination of the law of decrease of torsional oscillations when the range of oscillation was large in comparison with the palpable limits of elasticity. An equation of the formwhere y represents the range of oscillation, and x represents the number of oscillations which have taken place since the commencement of the observations in any one experiment, was found to give an exceedingly close representation of the results. The values of the quantities n, a, and b depend on the magnitude of the initial oscillation, and on the previous treatment of the wire. It was also found that, when the oscillations were allowed to die away to a sufficient extent, the value of n tended to diminish. The oscillations were practically isochronous.

XVII.—On a Fuller Test of the Law of Torsional Oscillation

1914 ◽  
Vol 33 ◽  
pp. 177-182
Author(s):  
James B. Ritchie
Keyword(s):  
Torsional Oscillation ◽  
Torsional Oscillations ◽  
The Law ◽  
Image Position

It has been shown in a former paper that an equation of the formcan be applied to give close representation of results in the determination of the law of decrease of torsional oscillations of wires of different materials, when the range of oscillation is large in comparison with the palpable limits of elasticity.

XXVIII.—An Apparatus for inducing Fatigue in Wires by means of repeated Extensional and Rotational Strains, with the Effects produced by such Fatigue in the Laws of Torsional Oscillation

1912 ◽  
Vol 31 ◽  
pp. 440-447
Author(s):  
J. B. Ritchie
Keyword(s):  
Empirical Equation ◽  
Initial Conditions ◽  
Torsional Oscillation ◽  
Preceding Paper ◽  
The Law

In the preceding paper the law of torsional oscillationyn(x + a) = b,where y = range of oscillation, x = number of oscillations since start of experiment, and n, a, b constants for any one experiment, is considered with reference to wires of various materials, together with the effects produced on the constants of that empirical equation, and in particular on the constant n, by altering the initial conditions of the experiment. The wires were subjected to changes of length, diameter, temperature, and rigidity, and the resultant changes in the values of n, a, and b were given in detail.

Pembagian Harta Waris dalam Tradisi Masyarakat Muslim di Gorontalo

2019 ◽  
Vol 13 (2) ◽  
pp. 187-202
Author(s):  
Hamid Pongoliu
Keyword(s):  
Islamic Law ◽  
Sharia Law ◽  
The Will ◽  
The Law

Gorontalo has a customary principle derived from sharia law, and the sharia law is sourced from the Qur'an, hadith, ijmak and qiyas (adati-hula'a to syara'a, syara'a hula'a to Kitabi), which should reflect the existence of the implementation of the distribution of inheritance in Islam in the Gorontalo community. This customary principle can be a source of law if it is a rational act, not immorality, done always repeatedly, does not bring harm and does not conflict with the law of sharak. But in reality there is the implementation of inheritance that violates Islamic law, namely the distribution by way of deliberation, the determination of the amount of heirs equally, the delay in the distribution of inheritance, wills with houses given to girls, wills not to distribute inheritance, distribution of assets it depends on the will of the heir and the delay in the distribution of inheritance on the grounds that one of the parents is still alive. The distribution by deliberation and determination of the amount of the portion for each heir are equally acceptable as long as they follow the guidelines of the Compilation of Islamic Law article 183 and the concept of takharruj which was previously preceded by the Shari'a division. After the heirs know the size of the portion, then they may agree to share it in their own way or leave the inheritance according to Shari'a and agree to give to each other with other heirs.

The Dudley Lee Case: A new approach to factual causation and its implications for transformative jurisprudence

2017 ◽  
Vol 30 (1) ◽  
pp. 273-289
Author(s):  
Anmari Meerkotter
Keyword(s):  
Case Note ◽  
Constitutional Court ◽  
Recent Contribution ◽  
New Approach ◽  
State Accountability ◽  
The Law ◽  
Transformative Impact ◽  
Constitutional Jurisprudence ◽  
Law Of Delict

The Constitutional Court (CC) judgment of Lee v Minister of Correction Services 2013 2SA 144 (CC) is a recent contribution to transformative constitutional jurisprudence in the field of the law of delict. This matter turned on the issue of factual causation in the context of wrongful and negligent systemic omissions by the state. In this case note, I explore the law relating to this element of delictual liability with specific regard to the traditional test for factual causation – the conditio sine qua non (‘but-for’) test. In particular, I note the problems occasioned by formalistic adherence to this test in the context of systemic state omissions as evidenced by the SCA judgment in the same matter. I also consider the manner in which English courts have addressed this problem. Thereafter, I analyse the CC’s broader approach to the determination of factual causation as one based on common sense and justice. I argue that this approach endorses a break from a formalistic application of the test and constitutes a step towards an approach which resonates with the foundational constitutional values of freedom, dignity and equality. Furthermore, it presents an appropriate solution to the problems associated with factual causation where systemic omissions are concerned. I then consider the transformative impact of the Lee judgment. In particular, I argue that the broader enquiry favoured by the CC facilitates the realisation of constitutionally guaranteed state accountability, and amounts to an extension of the existing norm of accountability jurisprudence. Hence, I contend that the judgment presents a further effort by the Constitutional Court to effect wholesale the constitutionalisation of the law of delict, as well as a vindicatory tool to be used by litigants who have been adversely affected by systemic state omissions.

The Comparative Study of Equisetum pratense, E. sylvaticum, E. telmateia: Accumulation of Silicon, Antioxidant and Antimicrobial Screening

2019 ◽  
Vol 70 (7) ◽  
pp. 2519-2523
Author(s):  
Denisa Batir Marin ◽  
Oana Cioanca ◽  
Mihai Apostu ◽  
Cristina Gabriela Tuchilus ◽  
Cornelia Mircea ◽  
...  
Keyword(s):  
Antimicrobial Activity ◽  
Methanol Extract ◽  
Previous Treatment ◽  
Total Phenolic ◽  
Quantitative Chemical Analysis ◽  
Qualitative And Quantitative ◽  
Antioxidant And Antimicrobial Activity ◽  
The Comparative Study

The objective of the current study is represented by the determination of silica and a phytochemical screening of phenolic derivates of some Equisetum species. The antioxidant and antimicrobial activity for Equisetum pratense Ehrh.,, Equisetum sylvaticum L. and Equisetum telmateia Ehrh. (sin. Equisetum maximum Lam.) were also investigated. The concentration of silicon (Si) in plants was determined by the spectrophotometric method using previous treatment with NaOH 50% both for the stem and the nodal branches [1]. Results obtained varied from 95.12 to 162.10 SiO2 mg/g dry plant which represents 4.44% to 7.58% Si/100g dry sample. Two types of total extracts were obtained using different solvents and were subjected to qualitative and quantitative chemical analysis considering total phenolic content [2]. The highest concentration of investigated compounds was found in the methanolic extract, E. sylvaticum, 196.5mg/g dry sample. Antioxidant activity was monitored spectrophotometrically and expressed in terms of IC50 (�g/mL) [3]. Values gathered ranged from 261.7 to 429.5 �g/mL. The highest capacity to neutralized DPPH radicals was found in E. sylvaticum. In vitro antimicrobial activity was determined using difusimetric method [4]. Testing was performed on four microorganisms: three strains of bacteria and one species of fungi. Different effects were noticed against the bacteria, furthermore the methanol extract appeared to be most efficient. All extracts showed significand antimicrobial activity against Staphylococcus aureus (ATCC 25923) and Candida albicans (ATCC 90028) and weak to no activity against Pseudomonas aeruginosa (ATCC 27853) and Escherichia coli (ATCC 25922).

Practical Application

2018 ◽  
Author(s):  
Kubo Mačák
Keyword(s):  
Armed Conflict ◽  
Armed Conflicts ◽  
Practical Application ◽  
Temporal Perspective ◽  
Applicable Law ◽  
The Law ◽  
Geographical Scope

This chapter analyses the practical application of the law of belligerent occupation in internationalized armed conflicts in its temporal, geographical, and personal dimensions. Firstly, from a temporal perspective, the law is shown to apply once one of the conflict parties consolidates its control over the enemy territory and substitutes its own authority for that of the displaced enemy. Secondly, the chapter assesses the geographical scope of the applicable law and draws specific guidelines for the determination of the territory subject to the law of occupation in various types of internationalized armed conflicts. Thirdly, the chapter endorses the allegiance-based approach to the designation of protected persons under the law of occupation and applies it to the reality of internationalized armed conflict. Overall, the chapter presents a workable toolkit for the application of the law of occupation to internationalized armed conflicts.

Reverberating the Glas: Towards a Deconstructive Account of Particularity in Hegel's Logic of the Concept

2020 ◽  
pp. 1-28
Author(s):  
Jakub Mácha
Keyword(s):  
Free Play ◽  
Subjective Perspective ◽  
The Law

Abstract Understanding Hegel's account of particularity has proven to be anything but straightforward. Two main accounts of particularity have been advanced: the particular as an example or instance and the particular as a subjective perspective on a universal concept. The problem with these accounts is that they reduce particularity either to singularity or to universality. As Derrida's analyses make apparent, the ‘structure of exemplarity’ in Hegel is quite intricate. Hegel uses ‘example’ in three senses: it means (1) ‘instance’, ‘illustration’, or (2) ‘model’, ‘exemplary individual’, ‘paradigm’, or (3) a by-play (a meaning derived from Hegel's neologism beiherspielen, in which Beispiel is understood quasi-etymologically as a ‘by-play’ of accidental moments). A Beispiel in the first sense can be replaced by another instance in a free play (by-play). This play of accidental moments, however, is not entirely free; it generates a series (of replacements) that ultimately leads to an example in the second sense, to an exemplary individual. I argue that particularity can be taken as exemplarity of this kind, oscillating between a singular example and a universal paradigm. Within this by-play, the universal concept, its law, is supposed to be mediated and determined. However, out of the differences between the examples the by-play induces another law, the law of non-mediation, which may, in Derrida's view, actually negate the dialectical movement towards universality. I argue, utilizing Malabou's concept of plasticity, that this disruption may be recovered. This implies that each individual example within a series is a particular determination of the universal. Hence, we can take literally Hegel's claim that the movement of the concept is play.

Finite element modeling of surge propagation and an application to the Hay River, N.W.T.

1992 ◽  
Vol 19 (3) ◽  
pp. 454-462 ◽  
Author(s):  
F. E. Hicks ◽  
P. M. Steffler ◽  
R. Gerard
Keyword(s):  
Finite Element ◽  
Channel Flow ◽  
Open Channel ◽  
Initial Conditions ◽  
Open Channel Flow ◽  
Kinematic Wave ◽  
Finite Element Scheme ◽  
Flow Problems ◽  
Ice Jam

This paper describes the application of the characteristic-dissipative-Galerkin method to steady and unsteady open channel flow problems. The robust performance of this new finite element scheme is demonstrated in modeling the propagation of ice jam release surges over a 500 km reach of the Hay River in Alberta and Northwest Territories. This demonstration includes the automatic determination of steady flow profiles through supercritical–subcritical transitions, establishing the initial conditions for the unsteady flow analyses. The ice jam releases create a dambreak type of problem which begins as a very dynamic situation then develops into an essentially kinematic wave problem as the disturbance propagated downstream. The characteristic-dissipative-Galerkin scheme provided stable solutions not only for the extremes of dynamic and kinematic wave conditions, but also through the transition between the two. Key words: open channel flow, finite element method, dam break, surge propagation.

Sign in / Sign up

Export Citation Format

Share Document