Manipulating and trapping light with photonic crystals from fundamental studies to practical applications

2016 ◽  
Vol 4 (47) ◽  
pp. 11032-11049 ◽  
Author(s):  
Eiichi Kuramochi
Keyword(s):  
Photonic Crystals ◽  
Power Consumption ◽  
Low Power ◽  
Cavity Qed ◽  
Photonic Devices ◽  
Low Power Consumption ◽  
Practical Applications ◽  
Recent Advances

This review summarizes recent advances in trapping and extracting light, cavity-QED studies, and low power consumption photonic devices by photonic crystals and nanostructures.

Improved Baugh Wooley Multiplier Using Cadence Register Transfer Level Logic for Power Consumption

2017 ◽  
Vol 14 (1) ◽  
pp. 277-283
Author(s):  
V Rajmohan ◽  
O. Uma Maheswari
Keyword(s):  
Power Consumption ◽  
Low Power ◽  
Vlsi Design ◽  
Register Transfer Level ◽  
Low Power Consumption ◽  
Power Efficient ◽  
Practical Applications ◽  
Efficient Process ◽  
Array Multiplier ◽  
Register Transfer

In modern days of VLSI design, speedy operations and low-power consumption is a key requirement for any circuits. When it comes to multipliers, the power efficient multiplier plays an important role. The main aim of this work is to develop the system with faster and less power multiplier for an efficient process by using Baugh-Wooley multipliers. The optimized Baugh-Wooley multiplier consumes least power, area and produces less delay. The proposed architecture is 193× times faster than Conventional array multiplier in the practical applications and 213× times faster than a conventional Baugh-Wooley multiplier. The Improved Baugh-Wooley multiplier consumes the power of 09.02 mW and area of 52426 μm2.

A Portable and High-Resolution System for Sleep Apnea Monitoring

2013 ◽  
Vol 753-755 ◽  
pp. 2369-2373
Author(s):  
Yu Xuan Hu ◽  
Yi Hu ◽  
Shu Ming Ye ◽  
Xiao Xiang Zheng
Keyword(s):  
Sleep Apnea ◽  
High Resolution ◽  
Power Consumption ◽  
Low Power ◽  
Monitoring System ◽  
Sleep Apnea Syndrome ◽  
Low Power Consumption ◽  
Practical Applications ◽  
Obstructive Sleep ◽  
Apnea Monitoring

As a major indicator of Obstructive Sleep Apnea Syndrome (OSAS) in clinical diagnosis, the monitoring of sleep apnea plays an important role in medical treatments of modern society. This paper proposes a portable sleep apnea monitoring system, which is of high-precision and low-power consumption, and capable of performing the long-term monitoring of OSAS patients multiple physiological parameters in clinical treatments. In the system, the AC modulated detection is adopted, and low amplification ratios are utilized in forestage and a high-resolution AD converter is designed in post-stages. Thus, it is able to acquire, analyze, and process physiological signals in real-time. In addition, ultralow-power chips are used in control system to save the power consumption. The experimental results show that our monitoring system has the strengths of high stability, low-power consumption (peak current90mA), and strong anti-interference ability, which demonstrates the potential in practical applications.

scholarly journals Development of a camera trap for perching dragonflies: a new tool for freshwater environmental assessment

PeerJ ◽  
2020 ◽  
Vol 8 ◽  
pp. e9681
Author(s):  
Akira Yoshioka ◽  
Akira Shimizu ◽  
Hiroyuki Oguma ◽  
Nao Kumada ◽  
Keita Fukasawa ◽  
...  
Keyword(s):  
Power Consumption ◽  
Low Power ◽  
Low Cost ◽  
Time Lapse ◽  
Camera Trap ◽  
Environmental Indicators ◽  
Low Power Consumption ◽  
Detection Accuracy ◽  
Practical Applications ◽  
Detection Frequency

Although dragonflies are excellent environmental indicators for monitoring terrestrial water ecosystems, automatic monitoring techniques using digital tools are limited. We designed a novel camera trapping system with an original dragonfly detector based on the hypothesis that perching dragonflies can be automatically detected using inexpensive and energy-saving photosensors built in a perch-like structure. A trial version of the camera trap was developed and evaluated in a case study targeting red dragonflies (Sympetrum spp.) in Japan. During an approximately 2-month period, the detector successfully detected Sympetrum dragonflies while using extremely low power consumption (less than 5 mW). Furthermore, a short-term field experiment using time-lapse cameras for validation at three locations indicated that the detection accuracy was sufficient for practical applications. The frequency of false positive detection ranged from 17 to 51 over an approximately 2-day period. The detection sensitivities were 0.67 and 1.0 at two locations, where a time-lapse camera confirmed that Sympetrum dragonflies perched on the trap more than once. However, the correspondence between the detection frequency by the camera trap and the abundance of Sympetrum dragonflies determined by field observations conducted in parallel was low when the dragonfly density was relatively high. Despite the potential for improvements in our camera trap and its application to the quantitative monitoring of dragonflies, the low cost and low power consumption of the detector make it a promising tool.

Semiconductor membrane photonic devices for ultra-low power consumption operation

2013 ◽  
Author(s):  
Shigehisa Arai ◽  
Nobuhiko Nishiyama ◽  
Tomohiro Amemiya ◽  
Takahiko Shindo ◽  
Jieun Lee ◽  
...  
Keyword(s):  
Power Consumption ◽  
Low Power ◽  
Photonic Devices ◽  
Low Power Consumption ◽  
Ultra Low Power ◽  
Semiconductor Membrane

Optimal design of a high homogeneous and small-size shim coil for atomic spin gyroscope based on 0-1 linear programming

2020 ◽  
Vol 64 (1-4) ◽  
pp. 165-172
Author(s):  
Dongge Deng ◽  
Mingzhi Zhu ◽  
Qiang Shu ◽  
Baoxu Wang ◽  
Fei Yang
Keyword(s):  
Linear Programming ◽  
Power Consumption ◽  
Low Power ◽  
Optimization Design ◽  
Structural Parameters ◽  
Axial Position ◽  
Low Power Consumption ◽  
Optimal Method ◽  
Atomic Spin ◽  
Shim Coil

It is necessary to develop a high homogeneous, low power consumption, high frequency and small-size shim coil for high precision and low-cost atomic spin gyroscope (ASG). To provide the shim coil, a multi-objective optimization design method is proposed. All structural parameters including the wire diameter are optimized. In addition to the homogeneity, the size of optimized coil, especially the axial position and winding number, is restricted to develop the small-size shim coil with low power consumption. The 0-1 linear programming is adopted in the optimal model to conveniently describe winding distributions. The branch and bound algorithm is used to solve this model. Theoretical optimization results show that the homogeneity of the optimized shim coil is several orders of magnitudes better than the same-size solenoid. A simulation experiment is also conducted. Experimental results show that optimization results are verified, and power consumption of the optimized coil is about half of the solenoid when providing the same uniform magnetic field. This indicates that the proposed optimal method is feasible to develop shim coil for ASG.

An Ultra-low Power Consumption MAC Protocol Complied with IEEE 802.15.4/4e for Wireless Smart Utility Networks

2016 ◽  
Vol 136 (11) ◽  
pp. 1555-1566 ◽  
Author(s):  
Jun Fujiwara ◽  
Hiroshi Harada ◽  
Takuya Kawata ◽  
Kentaro Sakamoto ◽  
Sota Tsuchiya ◽  
...  
Keyword(s):  
Power Consumption ◽  
Low Power ◽  
Ieee 802.15.4 ◽  
Mac Protocol ◽  
Low Power Consumption ◽  
Ultra Low Power

scholarly journals Ultra Low Power Consumption for Self-Oscillating Nanoelectromechanical Systems Constructed by Contacting Two Nanowires

Nano Letters ◽  
2013 ◽  
Vol 13 (4) ◽  
pp. 1451-1456 ◽  
Author(s):  
T. Barois ◽  
A. Ayari ◽  
P. Vincent ◽  
S. Perisanu ◽  
P. Poncharal ◽  
...  
Keyword(s):  
Power Consumption ◽  
Low Power ◽  
Nanoelectromechanical Systems ◽  
Low Power Consumption ◽  
Ultra Low Power
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