scholarly journals Folding a focalized acoustical vortex on a flat holographic transducer: Miniaturized selective acoustical tweezers

2019 ◽  
Vol 5 (4) ◽  
pp. eaav1967 ◽  
Author(s):  
Michael Baudoin ◽  
Jean-Claude Gerbedoen ◽  
Antoine Riaud ◽  
Olivier Bou Matar ◽  
Nikolay Smagin ◽  
...  
Keyword(s):  
Trapping Force ◽  
Current Systems ◽  
Widespread Dissemination ◽  
Piezoelectric Substrate ◽  
Acoustical Tweezers

Acoustical tweezers based on focalized acoustical vortices hold the promise of precise contactless manipulation of millimeter down to submicrometer particles, microorganisms, and cells with unprecedented combined selectivity and trapping force. Yet, the widespread dissemination of this technology has been hindered by severe limitations of current systems in terms of performance and/or miniaturization and integrability. Here, we unleash the potential of focalized acoustical vortices by developing the first flat, compact, paired single electrode focalized acoustical tweezers. These tweezers rely on spiraling transducers obtained by folding a spherical acoustical vortex on a flat piezoelectric substrate. We demonstrate the ability of these tweezers to grab and displace micrometric objects in a standard microfluidic environment with unique selectivity. The simplicity of this system and its scalability to higher frequencies open tremendous perspectives in microbiology, microrobotics, and microscopy.

Patient Scheduling — (Bibliography)

1977 ◽  
Vol 16 (02) ◽  
pp. 112-115 ◽  
Author(s):  
C. O. Köhler ◽  
G. Wagner ◽  
U. Wolber
Keyword(s):  
Information Processing ◽  
Medical Care ◽  
Medical Informatics ◽  
Relevant Literature ◽  
Patient Scheduling ◽  
Individual Scientist ◽  
Set Up ◽  
The Individual ◽  
New Literature ◽  
Current Systems

The entire field of information processing in medicine is today already spread out and branched to such an extent that it is no longer possible to set up a survey on relevant literature as a whole. But even in narrow parts of medical informatics it is hardly possible for the individual scientist to keep up to date with new literature. Strictly defined special bibliographies on certain topics are most helpful.In our days, problems of optimal patient scheduling and exploitation of resources are gaining more and more importance. Scientists are working on the solution of these problems in many places.The bibliography on »Patient Scheduling« presented here contains but a few basic theoretical papers on the problem of waiting queues which are of importance in the area of medical care. Most of the papers cited are concerned with practical approaches to a solution and describe current systems in medicine.In listing the literature, we were assisted by Mrs. Wieland, Mr. Dusberger and Mr. Henn, in data acquisition and computer handling by Mrs. Gieß and Mr. Schlaefer. We wish to thank all those mentioned for their assistance.

Steel Corrosion Characterization Using Pulsed Eddy Current Systems

2012 ◽  
Vol 12 (6) ◽  
pp. 2113-2120 ◽  
Author(s):  
Yunze He ◽  
Guiyun Tian ◽  
Hong Zhang ◽  
Mohammed Alamin ◽  
Anthony Simm ◽  
...  
Keyword(s):  
Eddy Current ◽  
Steel Corrosion ◽  
Pulsed Eddy Current ◽  
Current Systems

scholarly journals Telemanipulation of an Articulated Robotic Arm using a Commercial Virtual Reality Controller

2020 ◽  
Vol 6 (3) ◽  
pp. 127-130
Author(s):  
Max B. Schäfer ◽  
Kent W. Stewart ◽  
Nico Lösch ◽  
Peter P. Pott
Keyword(s):  
Virtual Reality ◽  
Real Time ◽  
Robotic Arm ◽  
Input Device ◽  
Robot Assisted ◽  
Promising Alternative ◽  
Input Devices ◽  
Current Input ◽  
Current Systems ◽  
Robot Assisted Surgery

AbstractAccess to systems for robot-assisted surgery is limited due to high costs. To enable widespread use, numerous issues have to be addressed to improve and/or simplify their components. Current systems commonly use universal linkage-based input devices, and only a few applicationoriented and specialized designs are used. A versatile virtual reality controller is proposed as an alternative input device for the control of a seven degree of freedom articulated robotic arm. The real-time capabilities of the setup, replicating a system for robot-assisted teleoperated surgery, are investigated to assess suitability. Image-based assessment showed a considerable system latency of 81.7 ± 27.7 ms. However, due to its versatility, the virtual reality controller is a promising alternative to current input devices for research around medical telemanipulation systems.

scholarly journals Selective Harvesting Robotics: Current Research, Trends, and Future Directions

2021 ◽  
Author(s):  
Gert Kootstra ◽  
Xin Wang ◽  
Pieter M. Blok ◽  
Jochen Hemming ◽  
Eldert van Henten
Keyword(s):  
Review Paper ◽  
Production Systems ◽  
Future Research ◽  
Limiting Factor ◽  
Future Directions ◽  
Research Directions ◽  
Selective Harvesting ◽  
Important Solution ◽  
Future Research Directions ◽  
Current Systems

Abstract Purpose of Review The world-wide demand for agricultural products is rapidly growing. However, despite the growing population, labor shortage becomes a limiting factor for agricultural production. Further automation of agriculture is an important solution to tackle these challenges. Recent Findings Selective harvesting of high-value crops, such as apples, tomatoes, and broccoli, is currently mainly performed by humans, rendering it one of the most labor-intensive and expensive agricultural tasks. This explains the large interest in the development of selective harvesting robots. Selective harvesting, however, is a challenging task for a robot, due to the high levels of variation and incomplete information, as well as safety. Summary This review paper provides an overview of the state of the art in selective harvesting robotics in three different production systems; greenhouse, orchard, and open field. The limitations of current systems are discussed, and future research directions are proposed.

Everything old is old again

2021 ◽  
pp. 014473942110173
Author(s):  
John J Carroll
Keyword(s):  
Public Administration ◽  
The Public ◽  
The World ◽  
Course Offerings ◽  
Entrepreneurial Activities ◽  
Core Course ◽  
Widespread Dissemination ◽  
Master Of Public Administration

A purpose of the Master of Public Administration (MPA) program is to translate theory into practical concepts to prepare leaders of the public and nonprofit sectors. The practice continues to employ entrepreneurial activities throughout the world. The academy has researched, written, and published extensively about entrepreneurship to build knowledge. The author pulled together aspects of the research to build an applicable framework for entrepreneurship—presenting, publishing, and designing an MPA course. This paper discusses that journey. The author sought to find the extent of similar courses in other accredited programs. The findings did not reveal widespread dissemination of entrepreneurship courses. An unintended finding shows that core course offerings appeared to be largely unchanged for decades. Is it time to “reinvent” the MPA program?

Current Systems in the Atlantic Ocean

2019 ◽  
pp. 204-211
Author(s):  
Inga M. Koszalka ◽  
Lothar Stramma
Keyword(s):  
Atlantic Ocean ◽  
Current Systems
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