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DETAILS have recently been published of work undertaken at the Aeronautical Engineering School in Rome in connexion with stratospheric aero‐engines, started just before…
DETAILS have recently been published of work undertaken at the Aeronautical Engineering School in Rome in connexion with stratospheric aero‐engines, started just before the war, and more particularly on the exothermic decomposition of nitromethane as a possible fuel in such engines. (La Chim. e l'Ind. 1949, XXXI (12) pp. 436–439.) The author is R. M. Corelli of the Institute of Aeronautical Material Technology, University of Rome, who was mainly responsible for the chemical side of the research. He worked in close collaboration with Professor Gen. G. A. Crocco and Professor Ing. Luigi Crocco. The first results on a large scale were unsuccessful.
One of the main objects in Russian economy for some years has been the development of new sources of raw materials and the effective use and conservation of existing supplies. This aim is probably more intensive and important in regard to metals than anything else, and for this reason the fight against corrosion takes a leading place in research. The amount of work, indeed, directed to this end has reached enormous proportions, with a corresponding and impressive array of literature, in books, articles and proceedings.
IN RUSSIA, as elsewhere, work has been undertaken for many years on the alloying of steel surfaces by ‘saturation’ with other metallic elements, with a view to increasing…
IN RUSSIA, as elsewhere, work has been undertaken for many years on the alloying of steel surfaces by ‘saturation’ with other metallic elements, with a view to increasing resistance to corrosion at high temperatures. Among the latest contributions on the subject is that of G. N. Dubinin (Vestnik Mashin, 1953, 33 (8), 74–79).
DR. S. C. ROBERT'S Presidential Address which is printed in the L.A. Record for May and reprinted in the usual separate Proceedings, will be read by all manner of librarians not only for its individual charm but also for a suggestion here and there which may have lasting effects. His major conclusion is that “the spiritual harmony and the intellectual Stability of mankind will Still be largely determined by the reading and writing of books,” whatever may be the triumphs of cinema, wireless and television. This was well worth repeating at a time when we are occupied by visual methods, quite justly, indeed ; if only again to Stress that these must not become an obsession which prevents our seeing that our real purpose is the book. So, too, we may ponder his gentle caveat: “in our laudable efforts towards a perfection of order and classification, there is inevitably a tendency to mistake means for ends, to make our systems our masters rather than our servants.” We know that there is a growing revolt against the intricate simplicities that are being introduced in cataloguing and classification; so intricate, indeed, that except to those who have done careful preparatory reading, writers upon them are completely unreadable. Not the least interesting part of Dr. Roberts's address was his account of early encounters with a library indicator and its attendant difficulties. These may be read as a warning, seeing that most of us have never seen an indicator, and some, because of the losses open access involves, would like to return to what is stupidly called “closed‐access,” a term as sensible as hot ice or dry wet.
Instead of enumerating the various scientific journals of the Soviet Union, this paper will discuss the special circumstances of present‐day Russian scientific publication, since it is the differences from normal British practice which raise difficulties for the inquirer.
The essence of a successful weld is that the joint should possess similar properties to the parent material. In the welding of stainless materials it is essential that the…
The essence of a successful weld is that the joint should possess similar properties to the parent material. In the welding of stainless materials it is essential that the corrosion resistance be preserved in the weld metal and adjacent areas. In this article the author discusses the difficulties involved and the means whereby corrosion resistance is maintained.
This paper provides a political analysis of legal pluralism from a “new institutionalist” perspective. In response to question of why states recognize and incorporate…
This paper provides a political analysis of legal pluralism from a “new institutionalist” perspective. In response to question of why states recognize and incorporate non-state normative orderings into their legal systems, it is hypothesized that the decision of incorporation is made to enhance the capacities of postcolonial states with “rational” calculations. In this respect, two new categories of legal pluralism are introduced: capacity-enhancing recognition and capacity-diminishing recognition. The paper lastly assesses the implications of legal pluralism upon the state-society relations and individual rights and liberties of citizens in the case of Israel.
We extend the literature on network perception by introducing a novel view of how this perception is structured. We propose the concept of Cognitive Aggregated Social…
We extend the literature on network perception by introducing a novel view of how this perception is structured. We propose the concept of Cognitive Aggregated Social Structures (CASS) as a framework to capture perceptions of opaque networks – that is, networks where relations are difficult to observe due to their features, their members, and the characteristics of the environment in which they operate. We argue that actors simplify their perception of opaque network structures via “chunking,” that is, by cognitively representing network ties as between categories of actors rather than between specific network members. We test the validity of the CASS construct and its predictive power by showing how these representations affect actors’ perceptions of relevant network outcomes. Using data from a major inter-organizational technology consortium, we show that perceived density among “chunks” in the knowledge transfer network is positively related to perceived consortium performance. Finally, we discuss the implications of our findings for the strategic management literature, highlighting potential contributions to strategic formulation and implementation, category emergence, industry evolution, and cognitive barriers to entry.
In the last decade, web services have become a major technology to implement loosely coupled business processes and perform application integration. Through the use of context, a new generation of web services, namely context‐aware web services (CASs), is currently emerging as an important technology for building innovative context‐aware applications. Unfortunately, CASs are still difficult to build. Issues like lack of context provisioning management approach and lack of generic approach for formalizing the development process need to be solved in the first place for easy and effective development of CASs. The purpose of this paper is to investigate the techniques on developing CASs.
The paper focuses on introducing a model‐driven platform, called ContextServ, and showcasing how to use this platform to rapidly develop a context‐aware web application, Smart Adelaide Guide. ContextServ adopts a model‐driven development (MDD) approach where a Unified Modeling Language (UML)‐based modeling language – ContextUML – is used to model web services and its context‐awareness features.
The paper presents novel techniques for efficient and effective development of CASs using a MDD approach. The ContextServ platform is the only one that provides a comprehensive software toolset that supports graphical modeling and automatic model transformation of CASs.
The proposed approach has been validated in practice by developing various CASs. The experimental study demonstrates the efficiency and effectiveness of the approach.
The paper presents a novel platform called ContextServ, which offers a set of visual editing and automation tools for easy and fast generating and deploying CASs.
The system of government-run poor relief in England, dating from the sixteenth century, was not replicated in Europe until the mid- to late 1800s. In order to understand…
The system of government-run poor relief in England, dating from the sixteenth century, was not replicated in Europe until the mid- to late 1800s. In order to understand why, poor relief must be placed within the socio-economic framework of capitalism, a system of surplus appropriation which originated in the novel class relations of English agriculture. The English way of dealing with poverty was distinctive and this distinctiveness was rooted in the unparalleled expansion of capitalism in that country in the early modern era. Assistance to the poor in England emerged alongside a qualitative social change, wherein an economy rooted in custom was transformed into one based on the competitive social relations of capitalism. The main conclusion of this article is that the welfare state was not a product of industrialization but of the class structure of agrarian capitalism.