The Application of Latex to Highway and Floor Surfacing

1940 ◽  
Vol 13 (4) ◽  
pp. 979-988
Author(s):  
W. G. Wren

Abstract Investigations on the development of latex mixtures for roadways were carried out in Malaya by Hastings during the period 1931 to 1933. Of the different mixtures tried, those containing aluminous cement gave the most promising results. Considerable progress of a practical character in working out the details of a suitable cement-latex mixture was then made, culminating in the laying in 1933 of an experimental section of road 4.5 miles from Kuala Lumpur on the Kuala Lumpur—Port Swettenham Road, where the traffic is fast and fairly heavy. In view of the promising results obtained in these experiments, it was agreed that the subject should be studied further in London, and that particular attention should be given to obtaining a better understanding of the fundamental principles involved in the preparation of latex mixtures for road and floor surfacing. As the economic factors are less exacting for flooring than for highways, it was decided that the application of latex mixtures to flooring should receive prior attention. The main purpose of the investigation has now been fulfilled, and this paper presents a summary of the work carried out and the results obtained. Mixtures of aluminous cement and latex have been in use for some time, both for flooring and other purposes; as early as 1923–4 patents were obtained for mixing cement with specially treated latex. The theory underlying this process is that the cement combines with the water of the latex and becomes hydrated, the latex losing its water and coagulating. How far this occurs in practice was not established at the outset of the work in London, and attempts were made to determine the extent of hydration of the cement and to examine the microstructure of the mixtures. During the course of this work it became apparent that the structure and physical characteristics of the products were largely dependent on the materials used in compounding and especially on the latex stabilizer. A systematic study of the principles underlying the compounding of the mixtures was then undertaken, and the relationship between compounding and physical properties determined. It thus became necessary to develop a series of tests to measure the physical properties, as no suitable methods were available. As a result of these experiments, a number of cement-latex compositions were developed and the most suitable selected for small scale trials. A summary of the work carried out and the conclusions reached are given in the following sections.

2021 ◽  
Vol 3 (1) ◽  
pp. 1-41
Author(s):  
Oluwatoyin Vincent Adepoju

 One may compose an essay on another essay, and possibly an even longer one than the essay being studied, long as that one is, when one is confronted with one of those things one has to say something about after encountering them. “Ritual Archives”, the climatic conclusion of the account in The Toyin Falola Reader ( Austin: Pan African University, 2018), of the efforts of Africa and its Americas Diaspora to achieve political, economic, intellectual and cultural individuality, is a deeply intriguing, ideationally, structurally and stylistically powerful and inspiring work, rich with ideas and arresting verbal and visual images. His focus is Africa and its Diaspora, but his thought resonates with implications far beyond Africa, into contexts of struggle for plurality of vision outside and even within the West, the global dominance of whose central theoretical constructs inspires Falola’s essay. “Ritual Archives”, oscillates between the analytical and the poetic, the ruminative and the architectonic, expressive styles pouring out a wealth of ideas, which, even though adequately integrated, are not always adequately elaborated on. This essay responds to the resonance of those ideas, further illuminating their intrinsic semantic values and demonstrating my perception of the intersections of the concerns they express with issues beyond the African referent of “Ritual Archives”. This response is organized in five parts, representing my understanding of the five major thematic strategies through which the central idea is laid out and expanded. 316 Oluwatoyin Vincent Adepoju The first section, “Developing Classical African Expressions as Sources of Locally and Universally Valid Theory” explores Falola’s advocacy for an expanded cultivation of theory from Africa created and Africa inspired expressive forms. “Epistemic and Metaphysical Integrity in Ifá”, the second part, examines his argument for a re-centering of studies in classical African thought within the epistemic and metaphysical frames of those bodies of knowledge, using the Yoruba origin Ifá system of knowledge, spiritual development and divination as an example, an illustration I analyze through my own understanding of the cognitive and metaphysical framework of Ifá. The third unit, “Falola’s Image Theory and Praxis, Image as Archive, Image as Initiator”, demonstrates Falola’s dramatization of the cognitive possibilities of works of art as inspirers of theory, exemplified by a figurine of the Yoruba origin òrìṣà cosmology, the deity Esu. This is the most poetic and one of the most imaginatively, ideationally evocative and yet tantalizingly inadequately elaborated sections of “Ritual Archives”, evoking continuities between Yoruba philosophy, òrìṣà cosmology and various bodies of knowledge across art and image theory and history, without expanding on the ideas or building them into a structure adequately responsive to the promise of the ideas projected, a foundation I contribute to developing by elucidating my understanding of the significance of the ideas and their consonance with related conceptions and issues from Asian, Western and African cultures. I also demonstrate how this section may contribute to clarification of the nature of Yoruba philosophy understood as a body of ideas on the scope of human intelligibility and the relationship between that philosophy and òrìṣà cosmology, an expansive view of the cosmos developed in relation to the philosophy. This is a heuristic rather than an attempt at a definitive distinction and is derived from the relationship between my practical and theoretical investigation of Yoruba epistemology and Falola’s exploration, in “Ritual Archives”, of a particularly strategic aspect of òrìṣà cosmology represented by Esu. The distinction I advance between Yoruba philosophy and òrìṣà cosmology and the effort to map their interrelations is useful in categorizing and critically analyzing various postulates that constitute classical Yoruba thought. This mapping of convergence and divergence contributes to working out the continuum in Yoruba thought between a critical and experiential configuration and a belief system. The fourth section, “The Institutional Imperative”, discusses Falola’s careful working out of the institutional implications of the approach he advocates of developing locally and universally illuminating theory out of endogenous African cultural forms. The fifth part, “Imagistic Resonance”, presents Falola’s effort to make the Toyin Falola Reader into a ritual archive, illustrating his vision for African art as an inspirer of theory, by spacing powerful black and white pictures of forms of this art, mainly sculptural but also forms of Epistemic Roots, Universal Routes and Ontological Roofs 317 clothing, largely Yoruba but also including examples from other African cultures, throughout the book. Except for the set of images in the appendix, these artistic works are not identified, nor does the identification of those in the appendix go beyond naming them, exclusions perhaps motivated by the need to avoid expanding an already unusually big book of about 1,032 pages of central text. I reproduce and identify a number of these artistic forms and briefly elaborate on their aesthetic force and ideational power, clarifying the theoretical formations in which they are embedded and exploring the insights they could contribute to theory beyond their originating cultures. “Ritual Archives” is particularly important for me because it elucidates views strategic to my own cognitive explorations and way of life but which I have not been able to articulate with the ideational comprehensiveness and analytical penetration Falola brings to the subject of developing theory from endogenous African cultural expressions, exemplified by Ifá and art, two of my favorite subjects


2021 ◽  
Vol 2 ◽  
pp. 86-91
Author(s):  
E.V. Hristinina ◽  

The article analyzes the criminal-legal aspects of the subject of bribery, the problems of legal regulation of responsibility for receiving bribes and petty bribery committed in the field of education. The article considers scientific points of view regarding certain features of the qualification of receiving bribes and small-scale bribery committed in the field of education. The practice of determining the minimum amount of a pre-determined bribe is subject to critical reflection. The concept of a gift is distinguished from the criminally punishable receipt of a bribe. The article sub-stantiates the relationship of the subject of the bribe with the situation and method of committing the crime and the identity of the criminal.


2021 ◽  
Vol 10 (6) ◽  
pp. e22210615584
Author(s):  
Mácio Emílio Caldeira da Silva ◽  
Dilceu Silveira Tolentino Júnior

In various situations in the day-to-day of the endodontic clinic, the professional is faced with the need to carry out the work in more than one session. Therefore, it is imperative to select the appropriate temporary restorative material, which does not allow marginal percolation and prevents contamination of the root canal system. Microleakage consists of the passage of fluids from one place to another, and in the oral cavity, it can occur towards the inside of the tooth via the material-tooth interface, taking microorganisms, toxins and chemical substances into the root canal, which would promote the treatment failure. For this, it is necessary to maintain the aseptic chain, through chemical-mechanical preparation and, if there is a need to use a temporary restorative material to seal the endodontic access cavity, it should act as a real barrier to marginal infiltrations. Temporary restorative materials are used in Endodontics to ensure efficient sealing between treatment sessions, as well as after the end of treatment, until the tooth is definitively restored. Several researches are carried out in search of an ideal restorative material. Various materials have been the subject of research and investigation. However, it is essential to perform a temporary restoration in endodontic procedures of multiple consultations, preventing contamination of the root canal system. This article consists of a literature review that addresses the relationship between coronary microleakage and the performance of temporary restorative materials, widely used between endodontic treatment sessions.


The Geologist ◽  
1860 ◽  
Vol 3 (9) ◽  
pp. 339-340
Author(s):  
T. Rupert Jones

Having at times been asked questions about the “Fossiliferous Ironsands” of the North Downs, which Mr. Prestwich described in the Journal of the Geological Society in 1858, vol. xiv., p. 322, &c., I find that some little diagram appears to be wanted by amateur geologists and general readers for the clearer demonstration of these strata and their relations to the Chalk and the Drift.I beg, therefore, to offer you the accompanying diagram, illustrative of the relationship of the so-called “Kentish Crag,” agreeable, I believe, to Mr. Prestwich's views of the subject, as given in his elaborate paper before mentioned. Having seen the ground at Lenham and Charing, to which Mr. Prestwich refers, and at the latter of which places my friend Mr. W. Harris, F.G.S., had some sections specially made, I feel the greater satisfaction in bearing testimony to Mr. Prestwich's careful working out of the whole question.


Paleobiology ◽  
1980 ◽  
Vol 6 (02) ◽  
pp. 146-160 ◽  
Author(s):  
William A. Oliver

The Mesozoic-Cenozoic coral Order Scleractinia has been suggested to have originated or evolved (1) by direct descent from the Paleozoic Order Rugosa or (2) by the development of a skeleton in members of one of the anemone groups that probably have existed throughout Phanerozoic time. In spite of much work on the subject, advocates of the direct descent hypothesis have failed to find convincing evidence of this relationship. Critical points are:(1) Rugosan septal insertion is serial; Scleractinian insertion is cyclic; no intermediate stages have been demonstrated. Apparent intermediates are Scleractinia having bilateral cyclic insertion or teratological Rugosa.(2) There is convincing evidence that the skeletons of many Rugosa were calcitic and none are known to be or to have been aragonitic. In contrast, the skeletons of all living Scleractinia are aragonitic and there is evidence that fossil Scleractinia were aragonitic also. The mineralogic difference is almost certainly due to intrinsic biologic factors.(3) No early Triassic corals of either group are known. This fact is not compelling (by itself) but is important in connection with points 1 and 2, because, given direct descent, both changes took place during this only stage in the history of the two groups in which there are no known corals.


2020 ◽  
Vol 1 (01) ◽  
pp. 13-20
Author(s):  
Dian Saputra

This study aims to find out the relationship between learning style and students’ knowledge aspect on Computer System Subject at SMK IT Rahmatan Karimah of  Central Bengkulu, the type of research is quantitative and the subject of research is grade X in SMK IT Rahmatan Karimah of  Central Bengkulu. Data collection techniques using observation, Questionnaire and documentation. Data analysis techniques used were Descriptive Analysis, and inferential Statistical Analysis. The results of visual learning style post-test were 11 people with a mean of 76.36, an auditory learning style of 8 people at a mean of 62.14, a kinesthetic learning style of 3 people at a mean of 50.33, apart from that (r x y = 2.35) and the magnitude of r is reflected in the table (r table = 0.4132). Then rxy > r table ie = 2.35> 0.4132. In other words, Ho is rejected and Ha is accepted. It has a significant relationship between the learning styles of students and students’ knowledge aspect on Computer System Subject of grade X TKJ in SMK IT Rahmatan Karimah of  Central Bengkulu


2006 ◽  
Vol 2 (1) ◽  
pp. 70-79 ◽  
Author(s):  
Ben Highmore

From a remarkably innovative point of departure, Ben Highmore (University of Sussex) suggests that modernist literature and art were not the only cultural practices concerned with reclaiming the everyday and imbuing it with significance. At the same time, Roger Caillois was studying the spontaneous interactions involved in games such as hopscotch, while other small scale institutions such as the Pioneer Health Centre in Peckham, London attempted to reconcile systematic study and knowledge with the non-systematic exchanges in games and play. Highmore suggests that such experiments comprise a less-often recognised ‘modernist heritage’, and argues powerfully for their importance within early-twentieth century anthropology and the newly-emerged field of cultural studies.


2018 ◽  
Vol 97 (1) ◽  
pp. 1-11 ◽  
Author(s):  
SangDong Lee

Queen Margaret (1070–93) has been the subject of much historical research. Previous studies of the queen and later saint have been undertaken from several different perspectives, including the biographical, institutional and hagiographical. In addition, some scholars have focused on her piety and later cult. Although a saint's miracles were one of the significant elements affecting the development of a cult, far less interest has been shown in the geopolitical importance of the miracles attributed to St Margaret and the relationship between the miracles and the saint's cult. The intention of this paper is to examine the miracles attributed to St Margaret and to identify their characteristics within the context of their contribution to, and influence in, the development of her cult.


Author(s):  
Jack Knight ◽  
James Johnson

Pragmatism and its consequences are central issues in American politics today, yet scholars rarely examine in detail the relationship between pragmatism and politics. This book systematically explores the subject and makes a strong case for adopting a pragmatist approach to democratic politics—and for giving priority to democracy in the process of selecting and reforming political institutions. What is the primary value of democracy? When should we make decisions democratically and when should we rely on markets? And when should we accept the decisions of unelected officials, such as judges or bureaucrats? This book explores how a commitment to pragmatism should affect our answers to such important questions. It concludes that democracy is a good way of determining how these kinds of decisions should be made—even if what the democratic process determines is that not all decisions should be made democratically. So, for example, the democratically elected U.S. Congress may legitimately remove monetary policy from democratic decision-making by putting it under the control of the Federal Reserve. This book argues that pragmatism offers an original and compelling justification of democracy in terms of the unique contributions democratic institutions can make to processes of institutional choice. This focus highlights the important role that democracy plays, not in achieving consensus or commonality, but rather in addressing conflicts. Indeed, the book suggest that democratic politics is perhaps best seen less as a way of reaching consensus or agreement than as a way of structuring the terms of persistent disagreement.


2020 ◽  
Vol 9 (1) ◽  
Author(s):  
Muhammad Faizal Samat ◽  
Muhammad Najmuddin Hamid ◽  
Muhammad Ameer Shafiq Awang@Ali ◽  
Wan Muhammad Iqmal Fazri Wan Juahari ◽  
Khairul Asraf Ghazali ◽  
...  

Malaysia has recorded the second highest involuntary turnover rate at 6% and third highest voluntary rate at 6.5% in South East Asia. Employee loyalty becomes critical towards employer. Thus, the purpose of this study was to examine the relationship between career development, compensation, job security, work environment and employee loyalty. In conducting this study, convenience sampling technique has been employed and respondents have been chosen in the area of Kuala Lumpur. Hypothesis were tested using regression analysis by using Smart-PLS. Based on the result, career development, compensation and job security were found to be significant with employee loyalty. However, work environment was found to be not significant with employee loyalty. It is suggested for future research to explore other variables in order to find the factors contributed in employee loyalty. Keywords: Career Development, Compensation, Job Security, Work Environment, Employee Loyalty


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