Recent developments in the experimental investigations of relaxations in pharmaceuticals by dielectric techniques at ambient and elevated pressure

2016 ◽  
Vol 100 ◽  
pp. 158-182 ◽  
Author(s):  
Katarzyna Grzybowska ◽  
Simone Capaccioli ◽  
Marian Paluch
Keyword(s):  
Elevated Pressure ◽  
Experimental Investigations ◽  
Recent Developments

Laser Assisted Machining: An Overview

1997 ◽  
Vol 119 (4B) ◽  
pp. 766-769 ◽  
Author(s):  
G. Chryssolouris ◽  
N. Anifantis ◽  
S. Karagiannis
Keyword(s):  
Scientific Work ◽  
Research Trends ◽  
Experimental Investigations ◽  
Laser Machining ◽  
Relevant Research ◽  
Research Topics ◽  
Laser Technology ◽  
Laser Assisted Machining ◽  
Recent Developments ◽  
Potential Applications

Since laser technology has considerable synergy with machining technologies, Laser Machining (LM) and Laser Assisted Machining (LAM) are relevant research topics. This paper attempts to give an overview of recent developments and research trends. Although scientific work on this area has contributed to the understanding of the process, there are still unresolved problems regarding the limitations of the techniques, optimum machining conditions, etc. The outcome of experimental investigations on LAM shows potential applications for this process but there are several issues to be resolved.

A Review of the Metal Magnetic Memory Technique

2016 ◽  
Author(s):  
Sheng Bao ◽  
Meili Fu ◽  
Shengnan Hu ◽  
Yibin Gu ◽  
Huangjie Lou
Keyword(s):  
Experimental Investigations ◽  
Magnetic Memory ◽  
Metal Magnetic Memory ◽  
Non Destructive Testing ◽  
Early Failure ◽  
Destructive Testing ◽  
Damage State ◽  
Recent Developments ◽  
As Stress ◽  
Non Destructive

Metal magnetic memory (MMM) is a newly developed non-destructive testing (NDT) technique. It has potentials to detect early failure, such as stress concentration, micro-crack and fatigue damage of ferromagnetic components. This paper outlines the recent developments of the mechanism studies on the MMM technique. Several advances in experimental investigations on the MMM technique are also summarized, e.g. the factors which can influence the detection signals, the criteria for judging the damage state and the magnetic parameters which can be used to assess the testing results. Finally, some future development trends about this technique are suggested.

scholarly journals Recent Developments in Graphene-Based Toxic Gas Sensors: A Theoretical Overview

Sensors ◽  
2021 ◽  
Vol 21 (6) ◽  
pp. 1992
Author(s):  
Heriberto Cruz-Martínez ◽  
Hugo Rojas-Chávez ◽  
Fernando Montejo-Alvaro ◽  
Yesica A. Peña-Castañeda ◽  
Pastor T. Matadamas-Ortiz ◽  
...  
Keyword(s):  
Gas Sensors ◽  
High Performance ◽  
Experimental Investigations ◽  
Pristine Graphene ◽  
First Principle ◽  
Toxic Gases ◽  
Recent Developments ◽  
Doped Graphene ◽  
Toxic Gas ◽  
Theoretical Results

Detecting and monitoring air-polluting gases such as carbon monoxide (CO), nitrogen oxides (NOx), and sulfur oxides (SOx) are critical, as these gases are toxic and harm the ecosystem and the human health. Therefore, it is necessary to design high-performance gas sensors for toxic gas detection. In this sense, graphene-based materials are promising for use as toxic gas sensors. In addition to experimental investigations, first-principle methods have enabled graphene-based sensor design to progress by leaps and bounds. This review presents a detailed analysis of graphene-based toxic gas sensors by using first-principle methods. The modifications made to graphene, such as decorated, defective, and doped to improve the detection of NOx, SOx, and CO toxic gases are revised and analyzed. In general, graphene decorated with transition metals, defective graphene, and doped graphene have a higher sensibility toward the toxic gases than pristine graphene. This review shows the relevance of using first-principle studies for the design of novel and efficient toxic gas sensors. The theoretical results obtained to date can greatly help experimental groups to design novel and efficient graphene-based toxic gas sensors.

Recent advances and challenges in electroplastic manufacturing processing of metals

2010 ◽  
Vol 25 (7) ◽  
pp. 1215-1224 ◽  
Author(s):  
Lei Guan ◽  
Guoyi Tang ◽  
Paul K. Chu
Keyword(s):  
Microstructure Evolution ◽  
Metal Forming ◽  
Energy Efficient ◽  
Experimental Investigations ◽  
Forming Process ◽  
Electroplastic Effect ◽  
The Past ◽  
Current State ◽  
Recent Developments ◽  
Metal Forming Process

Electroplastic manufacturing processing (EPMP) is a relatively new metal-forming process that is energy efficient, environmentally friendly, and versatile. In particular, it can be used to manufacture metals or alloys that are difficult to process by conventional manufacturing protocols. There have been significant advances in EPMP in the past decade, and this review summarizes our current state of understanding and describes recent developments in EPMP. Particular emphasis is placed on describing the mechanisms responsible for the electroplastic effect and microstructure evolution as well as major advances in EPMP of metals. Challenges facing theoretical and experimental investigations are also discussed.

Lubrication Review: Developments in Bearings and Lubricants—a Digest of the Literature From 1962–1963

1964 ◽  
Vol 86 (4) ◽  
pp. 883-906
Author(s):  
D. F. Hays ◽  
J. D. McHugh ◽  
E. E. Klaus ◽  
W. J. Wojtowicz ◽  
H. A. Hartung ◽  
...  
Keyword(s):  
Boundary Lubrication ◽  
Friction And Wear ◽  
Essential Elements ◽  
Theory And Practice ◽  
Experimental Investigations ◽  
Rolling Element Bearings ◽  
Rolling Element ◽  
Recent Developments ◽  
Film Lubrication ◽  
Fluid Film Lubrication

The 1962–1963 Lubrication Review brings together information on publications relating to several aspects of the broad field of lubrication. Although it does not cover all of the significant domestic and foreign publications in this field, it does summarize many of the results of current theoretical and experimental investigations. It also indicates themes or patterns of current programs relating to lubrication. The review is more than a list of references since each reviewer has commented on the essential elements or results reported by the investigators. The areas reviewed include fluid-film lubrication, developments in lubricants, metalworking lubricants, automotive lubricants, gear lubrication, boundary lubrication, rolling element bearings, and friction and wear. It is hoped that those who are currently involved in these specific areas will find the review helpful in summarizing recent developments in these areas and that those who are interested in extending their knowledge of lubrication theory and practice might find the review to be a helpful guide.

Trends in Electron Energy Loss Spectroscopy

1977 ◽  
Vol 35 ◽  
pp. 228-229
Author(s):  
C. Colliex ◽  
P. Trebbia
Keyword(s):  
Energy Loss ◽  
Electron Energy ◽  
Electron Energy Loss Spectroscopy ◽  
Materials Science ◽  
Analytical Technique ◽  
Recent Developments ◽  
Quantitative Results ◽  
Electron Microscopes ◽  
Electron Energy Loss ◽  
Primary Electrons

The physical foundations for the use of electron energy loss spectroscopy towards analytical purposes, seem now rather well established and have been extensively discussed through recent publications. In this brief review we intend only to mention most recent developments in this field, which became available to our knowledge. We derive also some lines of discussion to define more clearly the limits of this analytical technique in materials science problems.The spectral information carried in both low ( 0<ΔE<100eV ) and high ( >100eV ) energy regions of the loss spectrum, is capable to provide quantitative results. Spectrometers have therefore been designed to work with all kinds of electron microscopes and to cover large energy ranges for the detection of inelastically scattered electrons (for instance the L-edge of molybdenum at 2500eV has been measured by van Zuylen with primary electrons of 80 kV). It is rather easy to fix a post-specimen magnetic optics on a STEM, but Crewe has recently underlined that great care should be devoted to optimize the collecting power and the energy resolution of the whole system.

Filaments and membranes in the mitotic apparatus

1983 ◽  
Vol 41 ◽  
pp. 544-547
Author(s):  
Kent McDonald
Keyword(s):  
Intermediate Filaments ◽  
Mitotic Spindle ◽  
Mitotic Apparatus ◽  
Light Microscope Level ◽  
Microtubule Associated Proteins ◽  
Recent Developments ◽  
Associated Proteins ◽  
Force Generator ◽  
Spindle Function ◽  
Antibody Technology

At the light microscope level the recent developments and interest in antibody technology have permitted the localization of certain non-microtubule proteins within the mitotic spindle, e.g., calmodulin, actin, intermediate filaments, protein kinases and various microtubule associated proteins. Also, the use of fluorescent probes like chlorotetracycline suggest the presence of membranes in the spindle. Localization of non-microtubule structures in the spindle at the EM level has been less rewarding. Some mitosis researchers, e.g., Rarer, have maintained that actin is involved in mitosis movements though the bulk of evidence argues against this interpretation. Others suggest that a microtrabecular network such as found in chromatophore granule movement might be a possible force generator but there is little evidence for or against this view. At the level of regulation of spindle function, Harris and more recently Hepler have argued for the importance of studying spindle membranes. Hepler also believes that membranes might play a structural or mechanical role in moving chromosomes.

Software pattern recognition applied to nanodiffraction patterns from a STEM instrument

1986 ◽  
Vol 44 ◽  
pp. 694-695
Author(s):  
G.Y. Fan ◽  
J.M. Cowley
Keyword(s):  
Image Processing ◽  
Pattern Recognition ◽  
Computer Software ◽  
Processing System ◽  
Light Level ◽  
Host Computer ◽  
Low Light ◽  
Image Processing System ◽  
Recent Developments ◽  
On Line

In recent developments, the ASU HB5 has been modified so that the timing, positioning, and scanning of the finely focused electron probe can be entirely controlled by a host computer. This made the asynchronized handshake possible between the HB5 STEM and the image processing system which consists of host computer (PDP 11/34), DeAnza image processor (IP 5000) which is interfaced with a low-light level TV camera, array processor (AP 400) and various peripheral devices. This greatly facilitates the pattern recognition technique initiated by Monosmith and Cowley. Software called NANHB5 is under development which, instead of employing a set of photo-diodes to detect strong spots on a TV screen, uses various software techniques including on-line fast Fourier transform (FFT) to recognize patterns of greater complexity, taking advantage of the sophistication of our image processing system and the flexibility of computer software.

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