Recent Advances in Ideas on the Origin of the Igneous Rocks of the Tertiary Igneous Province—Introduction

1984 ◽  
Vol 48 (348) ◽  
pp. 309-310
Author(s):  
J. N. Walsh
Keyword(s):  
Igneous Rocks ◽  
Common Theme ◽  
Research Activity ◽  
Igneous Petrology ◽  
Recent Advances ◽  
Igneous Province ◽  
Current Research Activity ◽  
Petrology And Geochemistry ◽  
Work Done

The first five papers of this issue of the Mineralogical Magazine have as a common theme Tertiary Igneous Geology. In May 1983 the Society held a thematic meeting on the igneous rocks of the Tertiary Province and from this has followed a collection of papers, grouped here together for convenience. The range of topics covered is broadly based and the papers demonstrate the extent of current research activity in the area. All readers of the Magazine will be aware of the extent of the contribution made to igneous petrology and geochemistry by work done on the Tertiary Igneous Province. The Tertiary age of the igneous rocks had been recognized from work during the last century by Sir Archibald Geike and Professor J. W. Judd.

Applied Mechanics Problems in the Oil and Gas Industry

1986 ◽  
Vol 39 (11) ◽  
pp. 1687-1696 ◽  
Author(s):  
Jean-Claude Roegiers
Keyword(s):  
Oil And Gas ◽  
Petroleum Industry ◽  
Oil Industry ◽  
Oil And Gas Industry ◽  
Production Equipment ◽  
Paper Briefly ◽  
Research Activity ◽  
Gas Industry ◽  
Well Production ◽  
Current Research Activity

The petroleum industry offers a broad spectrum of problems that falls within the domain of expertise of mechanical engineers. These problems range from the design of well production equipment to the evaluation of formation responses to production and stimulation. This paper briefly describes various aspects and related difficulties with which the oil industry has to deal, from the time the well is spudded until the field is abandoned. It attempts to delineate the problems, to outline the approaches presently used, and to discuss areas where additional research is needed. Areas of current research activity also are described; whenever appropriate, typical or pertinent case histories are used to illustrate a point.

A Dynamic-Programming-Styled Algorithm for a Class of Multi-Agent Optimal Task Assignment

2001 ◽  
Author(s):  
Guang Yang ◽  
Vikram Kapila ◽  
Ravi Vaidyanathan
Keyword(s):  
Dynamic Programming ◽  
Task Assignment ◽  
Research Activity ◽  
Spacecraft Formation ◽  
Assignment Algorithm ◽  
Decentralized Decision Making ◽  
Current Research Activity ◽  
Multi Agent ◽  
Global Optimal ◽  
Multiple Spacecraft

Abstract In this paper, we use a dynamic programming formulation to address a class of multi-agent task assignment problems that arise in the study of fuel optimal control of multiple agents. The fuel optimal multi-agent control is highly relevant to multiple spacecraft formation reconfiguration, an area of intense current research activity. Based on the recurrence relation derived from the celebrated principle of optimality, we develop an algorithm with a distributed computational architecture for the global optimal task assignment. In addition, we propose a communication protocol to facilitate decentralized decision making among agents. Illustrative studies are included to demonstrate the efficacy of the proposed multi-agent optimal task assignment algorithm.

Software Agent Technology

2008 ◽  
pp. 1-24 ◽  
Author(s):  
Chrysanthi E. Georgakarakou ◽  
Anastasios A. Economides
Keyword(s):  
Reference Point ◽  
Software Agents ◽  
Large Body ◽  
Software Agent ◽  
Agent Technology ◽  
Virtual Enterprises ◽  
Research Activity ◽  
Depth Analysis ◽  
Current Research Activity ◽  
Key Issues

This chapter provides an overview of the rapidly evolving area of software agents and presents the basic aspects of applying the agent technology to virtual enterprises (VE). As the field of software agents can appear chaotic, this chapter briefly introduces the key issues rather than present an in-depth analysis and critique of the field. In addition to, this chapter investigates the application of agent technology to virtual enterprises and presents current research activity that focuses on this field serving as an introductory step. Furthermore, this chapter makes a list of the most important themes concerning software agents and the application of agent technology to virtual enterprises apposing some order and consistency and serve as a reference point to a large body of literature.

Charles Darwin on the Origin and Diversity of Igneous Rocks

1996 ◽  
Vol 15 (1) ◽  
pp. 49-67 ◽  
Author(s):  
Paul Pearson
Keyword(s):  
Charles Darwin ◽  
Modern Science ◽  
Igneous Rocks ◽  
Melting Points ◽  
Granitic Gneiss ◽  
Igneous Petrology ◽  
Physical Separation ◽  
Basaltic Melts ◽  
Sinking And Floating ◽  
Beagle Voyage

Charles Darwin provided one of the first detailed explanations for the diversity of igneous rocks. Building on many observations made during the Beagle voyage, Darwin hypothesized that density differences among crystals within a mass of partially molten rock would result in their physical separation by sinking and floating. Such a process, he proposed, could be responsible for the separation of compositionally distinct lavas from a single source. This idea, in modified form, lies at the heart of the modern science of igneous petrology. Darwin also speculated that partial melting of rocks in the deeper regions of the Earth's crust could produce basaltic melts. However, due to his lack of knowledge of the melting points of the silicate minerals, and his misinterpretation of a puzzling field locality at Bahia in Brazil, he wrongly believed granitic gneiss to be the progenitor of these basalts. Despite this error, Darwin's igneous speculations show a characteristic blend of detailed observation and broader theorizing. Most interesting of all, striking analogies can be found between Darwin's igneous work and his theory of natural selection, which he developed at about the same time.

Current Status and Research Activity of Selected Oral Biomaterials

1987 ◽  
Vol 110 ◽  
Author(s):  
Susan E. Brackett ◽  
Manville G. Duncanson
Keyword(s):  
Current Status ◽  
Future Research ◽  
Research Activity ◽  
Bonding Agents ◽  
Challenging Research ◽  
Current Research Activity ◽  
Research Problems ◽  
Resin Bonding

AbstractA brief review of the present consensus of the efficacy of two increasingly used oral biomaterials: castable ceramics and resin bonding agents is presented. The most challenging research problems will be discussed and current progress of the research in the areas reviewed. Some goals for future research will be suggested in light of the current research activity.

Two centuries after Hutton's ‘Theory of the Earth’: the status of granite science

1996 ◽  
Vol 87 (1-2) ◽  
pp. 353-359 ◽  
Author(s):  
D. Barrie Clarke
Keyword(s):  
Financial Support ◽  
Foreseeable Future ◽  
Research Activity ◽  
Relative Growth ◽  
Origin And Evolution ◽  
The Earth ◽  
Current Research Activity ◽  
The Status ◽  
Granitoid Rocks ◽  
Physical And Chemical

ABSTRACT:Granite is the final product of the high-temperature, magmatic, predominantly endogenic, chemical differentiation of the earth. Our understanding of the origin and evolution of granitoid rocks comes from a combination of direct observation, analogue experimentation and numerical modelling. A brief historical overview shows an exceptional level of such research activity over the last 50 years. The number and complexity of questions have resulted in both an absolute and a relative growth of the science since the plate tectonic revolution, largely consisting of refining the current magmatic paradigm within its overarching context. Current research activity involves large components of mineralogical–petrological–geochemical and structural–tectonic work, with much lower levels of experimental, geophysical and geochronological investigations. Many important questions concerning the thermal, physical and chemical aspects of the origin and evolution of granites remain. In keeping with the general progress of science, the complexity of the questions, the declining financial support and the revolution in information technology, directions of granite research in the foreseeable future will change from concrete and qualitative to abstract and quantitative, from expensive and active to cheap and armchair, from reductionist to holistic, and from periodic communication to continuous communication.

A preliminary study of methane inclusions in alkaline igneous rocks of the Kola igneous province, Russia: implications for the origin of methane in igneous rocks

1998 ◽  
Vol 10 (6) ◽  
pp. 1167-1180 ◽  
Author(s):  
Joanna Potter ◽  
Andrew H. Rankin ◽  
Peter J. Treloar ◽  
Valentin A. Nivin ◽  
Wupao Ting ◽  
...  
Keyword(s):  
Igneous Rocks ◽  
Igneous Province ◽  
Preliminary Study
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