Direct Write Techniques for Fabricating Unique Antennas

2000 ◽  
Vol 624 ◽  
Author(s):  
Robert M. Taylor ◽  
Kenneth H. Church ◽  
James Culver ◽  
Steve Eason
Keyword(s):  
Radio Frequency ◽  
Thick Film ◽  
High Performance ◽  
Three Dimensions ◽  
Receiver Design ◽  
Direct Write ◽  
Skill Levels ◽  
Radio Frequency Transmitter ◽  
Physical Dimensions

ABSTRACTThe current fabrication methods used to produce many antennas are limited by variances in the precision and skill levels of individual laborers. These variances slow production and often create inconsistent results. As radio-frequency transmitter and receiver design moves towards higher operating frequencies, the physical dimensions of the supporting antennas decrease. Smaller sizes add new complexities to the fabrication of these antennas. Several designs that may be considered high-performance antennas are difficult to reproduce; many times, they cannot be fabricated at all due to the sophisticated patterning and precision necessary for successful function. Direct-write technologies provide the tools necessary to fabricate unique patterns in two and three dimensions. A demonstration of a directly written antenna, constructed from a silver-based thick-film paste pen-deposited onto cylindrical alumina substrates, is presented for review

Sitsen: Passive sitting posture sensing based on wireless devices

2021 ◽  
Vol 17 (7) ◽  
pp. 155014772110248
Author(s):  
Miaoyu Li ◽  
Zhuohan Jiang ◽  
Yutong Liu ◽  
Shuheng Chen ◽  
Marcin Wozniak ◽  
...  
Keyword(s):  
Radio Frequency ◽  
Radio Frequency Identification ◽  
High Performance ◽  
Learning Algorithm ◽  
Low Cost ◽  
Recognition System ◽  
Sitting Posture ◽  
Average Accuracy ◽  
Phase Variations ◽  
Window Approach

Physical health diseases caused by wrong sitting postures are becoming increasingly serious and widespread, especially for sedentary students and workers. Existing video-based approaches and sensor-based approaches can achieve high accuracy, while they have limitations like breaching privacy and relying on specific sensor devices. In this work, we propose Sitsen, a non-contact wireless-based sitting posture recognition system, just using radio frequency signals alone, which neither compromises the privacy nor requires using various specific sensors. We demonstrate that Sitsen can successfully recognize five habitual sitting postures with just one lightweight and low-cost radio frequency identification tag. The intuition is that different postures induce different phase variations. Due to the received phase readings are corrupted by the environmental noise and hardware imperfection, we employ series of signal processing schemes to obtain clean phase readings. Using the sliding window approach to extract effective features of the measured phase sequences and employing an appropriate machine learning algorithm, Sitsen can achieve robust and high performance. Extensive experiments are conducted in an office with 10 volunteers. The result shows that our system can recognize different sitting postures with an average accuracy of 97.02%.

Growth of high-performance 4 5 m thick film REBCO tapes doped with hafnium using Advanced MOCVD

2021 ◽  
pp. 1-1
Author(s):  
Mahesh Paidpilli ◽  
Rudra Pratap ◽  
Mehdi Kochat ◽  
Eduard Galstyan ◽  
Chirag Goel ◽  
...  
Keyword(s):  
Thick Film ◽  
High Performance

Alliance portfolios and firm performance: the moderating role of environmental dynamics

2017 ◽  
Vol 117 (8) ◽  
pp. 1550-1566 ◽  
Author(s):  
Xiaoyan Wang ◽  
Haijun Bao
Keyword(s):  
Social Network ◽  
Network Theory ◽  
High Performance ◽  
Social Network Theory ◽  
Three Dimensions ◽  
Content Type ◽  
Negative Effect ◽  
Moderating Role ◽  
Alliance Portfolios

Purpose The purpose of this paper is to focus on the operation strategy of high-performance alliance portfolios by analyzing the effect of alliance portfolios on the performance of focal firms, using post-structuralism of social network theory and contingency theory. In detail, this paper refines alliance portfolios into three dimensions, and studies the moderating role of context on the relation between alliance portfolios and firm performance. Design/methodology/approach The empirical study was carried out with second-hand data gathered from Internal Revenue Service. In total, this paper gathered data from 506 focal firms in Zhejiang Province from 2001 to 2010 as the sample to test the hypotheses. Findings Based on the empirical results, the authors find the positive effect of relational dimension (weak alliance portfolios) and partner dimension (the diversity of partners) on performance. The effect of the former will become weaker with the increasing environmental dynamic, while the effect of the latter will become stronger. However, the structural dimension (alliance portfolios size) and relational dimension (new partners) have the negative effect on performance. And the negative effect will become stronger under high environmental dynamic. Moreover, the negative effect of non-local partners on performance becomes stronger when the environmental dynamic is high. Research limitations/implications The paper reveals that with the industry transformation caused by “internet +,” companies have been required go beyond traditional dyadic alliance management perspective. That is to say, individual alliance relationship should be seen as a part of a much broader picture of alliance portfolio. As such, the framework may help companies to manage their alliance portfolios by matching high-performance alliance portfolios to the external environment to produce a synergistic effect (Lea et al., 2006; Tritos et al., 2013; Keith et al., 2014) taking the characteristics of the configuration of alliance portfolios into consideration. Originality/value The paper presents a model that explains the effect of three dimensions of alliance portfolios on the performance of focal firms in different contexts through empirical study. This paper also integrates post-structuralism of social network theory and contingency theory to enable the understanding on the configuration of alliance portfolios.

scholarly journals High performance metal–insulator–graphene diodes for radio frequency power detection application

Nanoscale ◽  
2017 ◽  
Vol 9 (33) ◽  
pp. 11944-11950 ◽  
Author(s):  
Mehrdad Shaygan ◽  
Zhenxing Wang ◽  
Mohamed Saeed Elsayed ◽  
Martin Otto ◽  
Giuseppe Iannaccone ◽  
...  
Keyword(s):  
Radio Frequency ◽  
High Performance ◽  
Radio Frequency Power ◽  
Metal Insulator ◽  
Frequency Power

Metal–insulator–graphene diodes are proved to be able to deliver high performance, and meanwhile are suitable for radiofrequency power detection.

scholarly journals The Implementation of High Performance Work System in Public Organizations: Implication for Organizational Performance.

2015 ◽  
Vol 11 (28) ◽  
pp. 139
Author(s):  
Solomon Ozemoyah Ugheoke
Keyword(s):  
Organizational Performance ◽  
High Performance ◽  
Positive Relationship ◽  
Public Organizations ◽  
Training And Development ◽  
Three Dimensions ◽  
The Public ◽  
Work System ◽  
High Performance Work System ◽  
Individual Role

<p>Abstract</p> <p>A principal concern express among organizational researchers is to understand why some organizations irrespective of size, location and sector outperform others. High performance work system (HPWS) offers an explanation for this phenomenon. The implementation of unique practices leads some organizations to outperform others and give organizations the competitive advantage over others. While it has been well established that HPWS practices affect organizational performance within a large and complex organizations, less have been empirically established if they also create benefit for public organizations and this has generated concerns among researchers in the field of HPWS.  Following this argument, this study examines this theoretical gap with a survey data collected from employees in the public sector. Overall, three dimensions of HPWS were identified by the researchers and the level of awareness was assessed on a seven point Likert scale. We found that two out of the three dimensions of HPWS identified in this have a positive relationship with organizational performance.</p> <p>Keywords: HPWS, organizational performance, selective training and development, PMS, individual role.</p> <p> </p>

scholarly journals High-performance piezoelectric thick film based energy harvesting micro-generators for MEMS

2010 ◽  
Vol 5 ◽  
pp. 1164-1167 ◽  
Author(s):  
Tomasz Zawada ◽  
Karsten Hansen ◽  
Rasmus Lou-Moeller ◽  
Erling Ringgaard ◽  
Thomas Pedersen ◽  
...  
Keyword(s):  
Energy Harvesting ◽  
Thick Film ◽  
High Performance
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