The first principle of thermodynamics as applied to the analysis of processes in piston engines

2020 ◽  
pp. 7-10
Author(s):  
A.F. Dorohov ◽  
P.A. Dorohov

The discrepancy between the classical interpretation of the first law of thermodynamics and the real working process in piston ICEs is considered. A new representation of the law and its graphic interpretation are proposed. Keywords thermodynamics, first principle, internal energy, heat, work against external forces. [email protected]

Author(s):  
Sergey Aleksandrovich Kargin ◽  
Alexander Fedorovich Dorokhov ◽  
Nikolay Frolovich Popov

The article analyzes the first law of thermodynamics in terms of the classical law of energy conservation for thermodynamic systems formulated by J. R. Mayer, J. P. Joule and L. Helmholtz, as applied to contemporary piston engines with compression mixture in diesels. The prevailing factor in the system functioning (diesel engine) is the internal energy of a working mixture, rather than the heat input, as it was in the classical treatment of the first thermodynamic law. That is why, the wording of the law should be usefully changed from “heat delivered to the thermodynamic system is used for changing its internal energy and doing work against external forces” to “internal energy of a thermodynamic system determines the amount of heat given off inside the system and amount of work against external forces”. The mathematical form of the law and graphical interpretation of the theoretical thermodynamic Trinkler-Sabathe cycle are modified, accordingly. It has been stated that in practice the achievement of high technical and economic indices is provided by increasing the quality of working mixture: complete fuel evaporation in hot and moving medium, air/fuel ratio in the mixture in line with adopted standards of air/fuel proportion, high level of mixture homogeneity. The initial index to ensure highly efficient operation for reciprocating internal-combustion engines will be the internal energy of the working mixture which will determine the amount of heat emitted in the cylinder during mixture combustion and the amount of completed work against external forces.


2020 ◽  
Vol 28 (2) ◽  
pp. 449-479
Author(s):  
Sridevi Thambapillay

The Law Reform (Marriage and Divorce) Act 1976 (LRA) which was passed in 1976 and came into force on 1st March 1982, standardized the laws concerning non-Muslim family matters. Many family issues concerning non-Muslim have emerged ever since, the most important being the effects of unilateral conversion to Islam by one of the parties to the marriage. There has been a lot of public hue and cry for amendments to be made to the LRA. After much deliberation, the Malaysian Parliament finally passed the amendments to the LRA in October 2017, which came into force in December 2018. Although the amendments have addressed selected family law issues, the most important amendment on child custody in a unilateral conversion to Islam was dropped from the Bill at the last minute. Howsoever, at the end of the day, the real question that needs to be addressed is whether the amendments have resolved the major issues that have arisen over the past four decades? Hence, the purpose of this article is as follows: first, to examine the brief background to the passing of the LRA, secondly, to analyse the 2017 amendments, thirdly, to identify the weaknesses that still exist in the LRA, and finally, to suggest recommendations to overcome these weaknesses by comparing the Malaysian position with the Singaporean position. In conclusion, it is submitted that despite the recent amendments to the LRA, much needs to be done to overcome all the remaining issues that have still not been addressed.


Akustika ◽  
2021 ◽  
pp. 70-75
Author(s):  
Vladimir Pinchuk ◽  
Anton Pinchuk

Within the framework of the conceptual approach, taking into account the previously unknown, first identified by the authors features of the conditions of the internal energy equilibrium of material media (between their different physical nature energy states), the real contribution of acoustic disturbances experienced by media in the conditions of existence into ensuring of their and of the material world as a whole mutational and evolutionary transformations is taken into account and confirmed.


2021 ◽  
Vol 3 (1) ◽  
pp. 139-154
Author(s):  
Edi Tuahta Putra Saragih ◽  
Muhammad Citra Ramadhan ◽  
Isnaini Isnaini

This research aimed to: (a) obtain the forms of copyright infringement of songs and/or music (with or without lyrics); (b) understand the role of the police, in this case the Police Precinct, in the law enforcement; (c) identify the factors that influenced the law enforcement. The research method used the normative-empirical legal research, with the initial stages of specifying norms in order to get the proper picture, and then specifying empirical events in order to get the real picture. The research results showed several matters: 1) The forms of copyright infringement of songs and/or music (with or without lyrics) found included: the distribution of the works or the copies, the performances of the works, and the announcements of the works; 2) Police Precinct did notultimately carry out their role as a law enforcer for the copyright infringement of songs and/or music (with or without lyrics); and 3) The factors that influenced the law enforcement on the copyright infringement of songs and/or music (with or without lyrics), namely: legislation factor, in the matter of complaint offenses; law enforcement factor, in terms of the capacity of members; less supportive factor of facilities and infrastructure; legal awareness factor, in the problem of the lack of legal counseling; and cultural factor, related to the differences in norms in the copyright law between those in society and those in regulations. 


1887 ◽  
Vol 32 (140) ◽  
pp. 526-529

We venture to think that there was recently a considerable rapprochement between the judicial and the medical mode of viewing certain criminal acts. Friendly intercourse between judges and mental physicians has had the beneficial effect of opening the eyes of some of the former to the real nature of crimes committed by the insane, while very possibly the latter have derived benefit from the free intercommunication of ideas in regard to a just judgment of matters upon which lawyers and physicians must at bottom have a common object—simple justice. We are sure that no judge really wishes an irresponsible man to be punished, and it is very certain no medical man wishes the guilty criminal to escape the penalties of the law. There are occasions, however, when we think that judges are somewhat unduly disposed to set aside the evidence of medical men, and not only to lay down the law, but to go out of their way to influence the jury in a direction contrary to that of the medical opinion given in evidence. As an example of judicial discourtesy we might instance the petulant language of Baron Huddleston in the course of a trial at the Devon and Cornwall Assizes last November, in which he seemed to us to forget the golden rule in his brusque treatment of a medical witness. And, again, the same judge more recently acted in a way which has somewhat rudely shaken the hope and belief above expressed, and made us fear that our judges may sometimes “indifferently minister justice” in the least favourable construction of that phrase. At the Winchester assizes, in November, a young man (Russell) was charged before Baron Huddleston with murdering his grandmother. Among other witnesses, Dr. J. G. Symes, for thirty years Superintendent of the Dorset County Asylum, who had examined the prisoner by desire of the Home Office, alleged that he was of low intellect, from his mode of answering questions and his general appearance. He appeared indifferent to his position and to the act he had committed. He did not display any excitement or delusions during the interview, and appeared to know right from wrong, but, in his report to the Treasury, Dr. Symes stated that at the time of the murder he was, in his belief, of unsound mind, an opinion the judge would not allow him to express in Court. The prisoner had had fits. In his summing up, the judge animadverted upon the evidence of medical men, and he thought it proper to assert that they usurped the functions of a jury in getting into the witness-box to show their knowledge and ventilate their own fancies and theories without being able to give the reasons on which they based their conclusions. Happily, the jury, while finding the prisoner guilty of murder, strongly recommended him to mercy on account of weak intellect, and he has heen reprieved.


2015 ◽  

Understanding of the philosophy and theory behind the law is significance to law makers, legal practitioners, academicians and laymen. The rationales are to have some understanding of public policy and the real aim of the laws that made up particular practices or the root of practices. Therefore, this book highlight selected philosophy and theory of laws in the area of commercial, financial and corporate law; medical law; constitutional and administrative law and lastly human resource law. The massive information and knowledge in this book will benefits law makers, legal practitioners, academicians, universities students in understanding the philosophy and theory of the law first, before appreciating and applying the substantive law in their profession and life.


1963 ◽  
Vol 6 (2) ◽  
pp. 239-255
Author(s):  
Stanton M. Trott

The model of the real numbers described below was suggested by the fact that each irrational number ρ determines a linear ordering of J2, the additive group of ordered pairs of integers. To obtain the ordering, we define (m, n) ≤ (m', n') to mean that (m'- m)ρ ≤ n' - n. This order is invariant with group translations, and hence is called a "group linear ordering". It is completely determined by the set of its "positive" elements, in this case, by the set of integer pairs (m, n) such that (0, 0) ≤ (m, n), or, equivalently, mρ < n. The law of trichotomy for linear orderings dictates that only the zero of an ordered group can be both positive and negative.


2019 ◽  
Vol 22 (3) ◽  
pp. 417-438
Author(s):  
Jaemin Lee

ABSTRACT Fisheries subsidies norms and discussions at present are based on the subsidy framework under the Agreement on Subsidies and Countervailing Measures. This approach is pertinent vis-à-vis various types of governmental subsidies provided to fisheries industries. It, however, fails to tackle illegal, unreported and unregulated (IUU) fishing, one of the core targets of the fisheries subsidies norms, because few governments ‘subsidize’ illegal activities such as IUU. As far as IUU fishing is concerned, the real challenge is not about subsidies but about how to enforce domestic laws and regulations to punish owners, operators, and fishermen engaged in such illegal activities. Future discussion of fisheries subsidies norms regarding IUU should reflect the law enforcement aspect in addition to the present subsidy aspect.


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