Directed Energy Weapons - Are We There Yet? The Future of DEW Systems and Barriers to Success

2009 ◽  
Author(s):  
Elihu Zimet ◽  
Christopher Mann
Keyword(s):  
Barriers To Success ◽  
The Future ◽  
Directed Energy

Technological Change and Military Innovation

2021 ◽  
pp. 134-161
Author(s):  
Michael E. O’Hanlon
Keyword(s):  
Technological Change ◽  
Military Innovation ◽  
Military Technology ◽  
General Audience ◽  
The Core ◽  
Future Developments ◽  
Wide Range ◽  
Defense Technology ◽  
The Future ◽  
Directed Energy

This chapter examines various areas of defense technology, with a philosophy that might be described as “physics for poets.” The chapter provides information on the contemporary state of technology and projections for the future. It reviews broad trends across many areas of military technology, including cyber and artificial intelligence, as well as robotics, directed energy, and stealth. With a goal of making these important subjects accessible to a general audience, it suggests methods by which nonspecialists can make inroads into understanding them. The chapter surveys a wide range of military technologies, with a particular eye toward assessing whether collectively they can be used to revolutionize warfare in the coming years and decades. Ultimately, the chapter's category-by-category examination of military technology employs the same basic framework in the 2000 Technological Change and the Future of Warfare. The core of that book was an analysis of ongoing and likely future developments in various categories of military-related technologies.

scholarly journals Allied Maritime Forces Transformation: Towards a Defence Planning Process That Includes Adaptable Warships

2019 ◽  
Author(s):  
Richard Logtmeijer ◽  
David Manley ◽  
Gregory Condon ◽  
Joseph Cole ◽  
Jean-Denis Caron ◽  
...  
Keyword(s):  
New Technologies ◽  
Planning Process ◽  
Weapon Systems ◽  
Organic Systems ◽  
Operational Capabilities ◽  
The Future ◽  
Directed Energy ◽  
Mine Countermeasures ◽  
The Cold War ◽  
Short Time

Warships have long service lives. During the life of a warship the types of operations that will be assigned to the ship will change (this happened for example at the end of the Cold War), the technology behind the installed systems will advance (e.g., radar performance and miniaturisation) and new technologies will emerge. New technologies are likely to require changes in the way operations are presently conducted (e.g., off-board systems for conducting mine countermeasures operations) and can deliver new operational capabilities to the ship (e.g., directed-energy weapon systems). For these reasons, warships can only maintain maximum operational relevance through-life if their operational capabilities can be augmented and adapted to meet changing user requirements. NATO nations and partners, and also their peer competitors, are designing and building more adaptable warships. A common characteristic of these ships is that mission essential systems can be added to and removed from the ship in a relatively short time period. Warship roles can thus be reconfigured. The future of this trend is transforming the NATO defence planning process so that the future structure of the allied maritime forces will include an appropriate mix of adaptable warships and up-to-date mission packages that can respond to constantly changing operational tasking. The naval architect is already aware that traditional warship design features must be re-worked to accommodate modular, in addition to—or even to replace—organic systems. This paper considers the transformation from the engineering and management of mission packages, their deployment and integration into new warship designs towards a new maritime defence planning philosophy and process.

scholarly journals Feasibility Study on Topological Optimisation And Additive Manufacturing of An Electric Vehicle Battery Housing

2021 ◽  
Author(s):  
Wai Yee Yeong ◽  
Swee Leong Sing ◽  
Bashu Aman
Keyword(s):  
Additive Manufacturing ◽  
Electric Vehicle ◽  
Powder Bed ◽  
Freeform Fabrication ◽  
The Future ◽  
Battery Packs ◽  
Final Design ◽  
Electric Vehicle Battery ◽  
And Performance ◽  
Directed Energy

Abstract Electric vehicles (EVs) are in the incipient stage today and have the capacity to lead the automobile sector in the future. Battery packs of an electric vehicle are held by a large battery housing located at the bottom of the car body. The battery pack contributes significantly to the vehicle’s overall weight. Reduction of the overall weight of the future cars is a designer’s priority today. The aim to reduce weight can be achieved using topological optimisation. The optimised design is complex and therefore requires freeform fabrication. Additive manufacturing (AM) or 3D printing allows the fabrication of complex structures, hence, enables the fabrication of topological optimised parts without compromising on the part performance. In this paper, the topological optimisation of an electric vehicle battery housing is carried out to reduce the weight of the housing. Certain parts of the battery housing are removed and modified to get the final design. The physical, geometric, and performance aspects of the re-designed and original battery housing are compared. Additionally, the feasibility of the fabrication of the re-designed battery housing is discussed through support structures generation and feasibility index. Different AM methods such as powder bed fusion (PBF) and directed energy deposition (DED) are analysed on the basis of advantages and limitations. Finally, a suitable AM technique, selective laser melting (SLM), is chosen to fabricate the topological optimised battery housing.

International determination of the total motion of the pole

1961 ◽  
Vol 13 ◽  
pp. 29-41
Author(s):  
Wm. Markowitz
Keyword(s):  
Secular Motion ◽  
The Future

A symposium on the future of the International Latitude Service (I. L. S.) is to be held in Helsinki in July 1960. My report for the symposium consists of two parts. Part I, denoded (Mk I) was published [1] earlier in 1960 under the title “Latitude and Longitude, and the Secular Motion of the Pole”. Part II is the present paper, denoded (Mk II).

Status of the Lick Proper Motion Program

1978 ◽  
Vol 48 ◽  
pp. 387-388
Author(s):  
A. R. Klemola
Keyword(s):  
Proper Motion ◽  
The Future

Second-epoch photographs have now been obtained for nearly 850 of the 1246 fields of the proper motion program with centers at declination -20° and northwards. For the sky at 0° and northward only 130 fields remain to be taken in the next year or two. The 270 southern fields with centers at -5° to -20° remain for the future.

Some Structural Features of Metaphase Chromosomes of Mice and Men

1967 ◽  
Vol 25 ◽  
pp. 190-191
Author(s):  
Godfrey C. Hoskins ◽  
Betty B. Hoskins
Keyword(s):  
Electron Microscopy ◽  
Electron Micrographs ◽  
Structural Features ◽  
Metaphase Chromosomes ◽  
The Future ◽  
Of Mice And Men ◽  
Mouse Cells ◽  
Human And Mouse

Metaphase chromosomes from human and mouse cells in vitro are isolated by micrurgy, fixed, and placed on grids for electron microscopy. Interpretations of electron micrographs by current methods indicate the following structural features.Chromosomal spindle fibrils about 200Å thick form fascicles about 600Å thick, wrapped by dense spiraling fibrils (DSF) less than 100Å thick as they near the kinomere. Such a fascicle joins the future daughter kinomere of each metaphase chromatid with those of adjacent non-homologous chromatids to either side. Thus, four fascicles (SF, 1-4) attach to each metaphase kinomere (K). It is thought that fascicles extend from the kinomere poleward, fray out to let chromosomal fibrils act as traction fibrils against polar fibrils, then regroup to join the adjacent kinomere.

Freeze-fracture cytochemistry: A goal set by Russell Steere in 1957

1993 ◽  
Vol 51 ◽  
pp. 60-61
Author(s):  
Nicholas J Severs
Keyword(s):  
Chemical Nature ◽  
Biological Systems ◽  
Freeze Fracture ◽  
Structural Components ◽  
Major Goal ◽  
Membrane Biology ◽  
Routine Application ◽  
The Future ◽  
Freeze Etching

In his pioneering demonstration of the potential of freeze-etching in biological systems, Russell Steere assessed the future promise and limitations of the technique with remarkable foresight. Item 2 in his list of inherent difficulties as they then stood stated “The chemical nature of the objects seen in the replica cannot be determined”. This defined a major goal for practitioners of freeze-fracture which, for more than a decade, seemed unattainable. It was not until the introduction of the label-fracture-etch technique in the early 1970s that the mould was broken, and not until the following decade that the full scope of modern freeze-fracture cytochemistry took shape. The culmination of these developments in the 1990s now equips the researcher with a set of effective techniques for routine application in cell and membrane biology.Freeze-fracture cytochemical techniques are all designed to provide information on the chemical nature of structural components revealed by freeze-fracture, but differ in how this is achieved, in precisely what type of information is obtained, and in which types of specimen can be studied.

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