Submillimetre waves: A survey of the ‘state of the art’ and some recent developments in research

1976 ◽  
Vol 46 (8-9) ◽  
pp. 379 ◽  
Author(s):  
R.J. Batt ◽  
D.J. Harris
1984 ◽  
Vol 79 ◽  
pp. 607-616
Author(s):  
R. R. Shannon

The requirements on gratings and coatings for astronomical use differ from the general industrial requirements primarily in the scale of the components to be fabricated. Telescopes have large primary mirrors which require large coating plants to handle the components. Dispersive elements are driven by the requirement to be efficient in the presence of large working apertures, and usually optimize to large size in order to efficiently use the incoming radiation. Beyond this, there is a “new” technology of direct electronic sensors that places specific limits upon the image scale that can be used at the output of a telescope system, whether direct imagery or spectrally divided imagery is to be examined. This paper will examine the state of the art in these areas and suggest some actions and decisions that will be required in order to apply current technology to the predicted range of large new telescopes.


2019 ◽  
Vol 7 (12) ◽  
pp. 1974-1985 ◽  
Author(s):  
Mirta Jiménez ◽  
Cristina Abradelo ◽  
Julio San Román ◽  
Luis Rojo

This review brings up to date the state of the art of strontium and zinc based regenerative therapies, both having a promoting effect on tissue formation and a role inhibiting resorption in musculoskeletal disorders.


2015 ◽  
Vol 825-826 ◽  
pp. 597-604 ◽  
Author(s):  
Arno Köpf ◽  
Jozef Keckes ◽  
Juraj Todt ◽  
Reinhard Pitonak ◽  
Ronald Weissenbacher

In this contribution the authors will present a short summit of the state of the art in the field of nanostructured coatings and will then emphasise on the most recent developments concerning the possible changes in the coating architecture of CVD AlTiN, which can be achieved by changing some of the process parameters


Sensor Review ◽  
2014 ◽  
Vol 34 (1) ◽  
pp. 24-35 ◽  
Author(s):  
Sari Lakkis ◽  
Rafic Younes ◽  
Yasser Alayli ◽  
Mohamad Sawan

Purpose – This paper aims to give an overview about the state of the art and novel technologies used in gas sensing. It also discusses the miniaturization potential of some of these technologies in a comparative way. Design/methodology/approach – In this article, the authors state the most of the methods used in gas sensing discuss their advantages and disadvantages and at last the authors discuss the ability of their miniaturization comparing between them in terms of their sensing parameters like sensitivity, selectivity and cost. Findings – In this article, the authors will try to cover most of the important methods used in gas sensing and their recent developments. The authors will also discuss their miniaturization potential trying to find the best candidate among the different types for the aim of miniaturization. Originality/value – In this article, the authors will review most of the methods used in gas sensing and discuss their miniaturization potential delimiting the research to a certain type of technology or application.


Data ◽  
2021 ◽  
Vol 6 (8) ◽  
pp. 86
Author(s):  
Wullianallur Raghupathi ◽  
Viju Raghupathi

We examine the state-of-the-art of the business analytics field by identifying and describing the four types of analytics and the three pillars of modeling. Further, we offer a framework of the interplay between the types of analytics and those pillars of modeling. The article describes the architectural framework and outlines an analytics methodology life cycle. Additionally, key contemporary design issues and challenges are highlighted. In this paper, we offer researchers and practitioners a contemporary overview of business analytics. As business analytics has emerged as a distinct discipline with the key objective to gain insight to make informed decisions, this state-of-the art survey sheds light on recent developments in the business analytics discipline.


2011 ◽  
Vol 2011 ◽  
pp. 1-15 ◽  
Author(s):  
Vivek Jain ◽  
Apurbba Kumar Sharma ◽  
Pradeep Kumar

Demand for micromachining has been on the rise in recent years owing to increasing miniaturization. Production of parts in microscale, especially with brittle materials, is challenging. Ultrasonic micromachining has been gaining popularity as a new alternative in fabrication of such parts. The process gives a machining option for geometrically challenging and/or brittle material parts that are difficult to machine by conventional processes. In the recent years, possibilities have been explored to improve the “Unit Removal” in microultrasonic machining (micro-USM). However, the research in the area is yet to attain momentum. The present paper is an attempt to present the state of the art in the area of micro-USM based on the literature. Developments in the critical areas of the process like machine tool technology, machining tool head, transducers, and precision attainable in the process with challenges have been discussed. Potential research issues have been explored for future work. Possible application areas have been identified.


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