High energy-efficient B+R LED beam shaping with micro-lens diffuser for agricultural lighting

2011 ◽  
Author(s):  
Yu-Yu Chang ◽  
Xuan-Hao Lee ◽  
Ching-Cherng Sun
Keyword(s):  
Energy Efficient ◽  
High Energy ◽  
Beam Shaping ◽  
Micro Lens

Enhanced Adaptive Distributed Energy-Efficient Clustering (EADEEC) for Wireless Sensor Networks

2020 ◽  
Vol 13 (2) ◽  
pp. 168-172
Author(s):  
Ravi Kumar Poluru ◽  
M. Praveen Kumar Reddy ◽  
Syed Muzamil Basha ◽  
Rizwan Patan ◽  
Suresh Kallam
Keyword(s):  
Network Lifetime ◽  
Routing Protocols ◽  
Energy Efficient ◽  
High Energy ◽  
Base Station ◽  
Sensor Nodes ◽  
Wireless Sensor ◽  
Distributed Energy ◽  
Stability Period ◽  
Energy Efficient Clustering

Background:Recently Wireless Sensor Network (WSN) is a composed of a full number of arbitrarily dispensed energy-constrained sensor nodes. The sensor nodes help in sensing the data and then it will transmit it to sink. The Base station will produce a significant amount of energy while accessing the sensing data and transmitting data. High energy is required to move towards base station when sensing and transmitting data. WSN possesses significant challenges like saving energy and extending network lifetime. In WSN the most research goals in routing protocols such as robustness, energy efficiency, high reliability, network lifetime, fault tolerance, deployment of nodes and latency. Most of the routing protocols are based upon clustering has been proposed using heterogeneity. For optimizing energy consumption in WSN, a vital technique referred to as clustering.Methods:To improve the lifetime of network and stability we have proposed an Enhanced Adaptive Distributed Energy-Efficient Clustering (EADEEC).Results:In simulation results describes the protocol performs better regarding network lifetime and packet delivery capacity compared to EEDEC and DEEC algorithm. Stability period and network lifetime are improved in EADEEC compare to DEEC and EDEEC.Conclusion:The EADEEC is overall Lifetime of a cluster is improved to perform the network operation: Data transfer, Node Lifetime and stability period of the cluster. EADEEC protocol evidently tells that it improved the throughput, extended the lifetime of network, longevity, and stability compared with DEEC and EDEEC.

scholarly journals Enabling holistic design for high energy efficient office buildings through the use of subjective occupant feedback

2021 ◽  
pp. 102867
Author(s):  
Niels Lassen ◽  
Tine Hegli ◽  
Tor Helge Dokka ◽  
Terje Løvold ◽  
Kristian Edwards ◽  
...  
Keyword(s):  
Energy Efficient ◽  
High Energy ◽  
Office Buildings ◽  
Occupant Feedback ◽  
Holistic Design

The elliptical micro-lens array in the application of the LDA beam shaping

Optik ◽  
2014 ◽  
Vol 125 (24) ◽  
pp. 7149-7153 ◽  
Author(s):  
Bo Qiao ◽  
Ping Jiang ◽  
Huajun Yang ◽  
Xinwu Ma ◽  
Ming Xu
Keyword(s):  
Beam Shaping ◽  
Lens Array ◽  
Micro Lens Array ◽  
Micro Lens

Beam shaping of edge-emitting diode lasers using a single double-axial hyperboloidal micro-lens

2013 ◽  
Vol 38 (24) ◽  
pp. 5414 ◽  
Author(s):  
Zhen-Nan Tian ◽  
Li-Jie Wang ◽  
Qi-Dai Chen ◽  
Tong Jiang ◽  
Li Qin ◽  
...  
Keyword(s):  
Diode Lasers ◽  
Beam Shaping ◽  
Micro Lens

A Review of Switched Inertance Hydraulic Converter Technology

2018 ◽  
Author(s):  
Chenggang Yuan ◽  
Min Pan ◽  
Andrew Plummer
Keyword(s):  
Power Management ◽  
Energy Efficient ◽  
Control Strategies ◽  
New Technology ◽  
High Energy ◽  
Management Systems ◽  
Hydraulic Power ◽  
Controlled Systems ◽  
Hydraulic Machines ◽  
And Control

Digital hydraulics is a new technology providing an alternative to conventional proportional or servovalve-controlled systems in the area of fluid power. Research is driven by the need for highly energy efficient hydraulic machines but is relatively immature compared to other energy-saving technologies. Digital hydraulic applications, such as digital pumps, digital valves and actuators, switched inertance hydraulic converters (SIHCs) and digital hydraulic power management systems, all promise high energy efficiency. This review introduces the development of SIHCs and evaluates the device configurations, performance and control strategies that are found in current SIHC research, particularly focusing on the work being undertaken in last 15 years. The designs for highspeed switching valves are evaluated, and their advantages and limitations are discussed. This article concludes with some suggestions for the future development of SIHCs.

scholarly journals High energy efficient and thermally stable solar selective absorber constructed with TiNxOy based multilayers

2020 ◽  
Vol 10 (3) ◽  
pp. 733 ◽  
Author(s):  
Zhiyong Wu ◽  
Feiliang Chen ◽  
Zhiyi Xuan ◽  
Yuwei Chen ◽  
Wangzhou Shi ◽  
...  
Keyword(s):  
Energy Efficient ◽  
High Energy ◽  
Thermally Stable

scholarly journals Office Interior: The Influence of Office Environmental Factors towards Task Performance

2018 ◽  
Vol 7 (3.32) ◽  
pp. 116
Author(s):  
Arita Hanim Awang ◽  
Zuraini Denan ◽  
Noor Hanita Abdul Majid
Keyword(s):  
Task Performance ◽  
Energy Efficient ◽  
High Energy ◽  
Office Workers ◽  
Related Field ◽  
Second Home ◽  
Environmental Setting ◽  
Environmental Air ◽  
Energy Efficient Building ◽  
High Energy Consumption

Office environment has become crucial in providing comfort for the workers and in maintaining the sustainability of an office.  Office environmental comfort is significant to office workers life as the office has become their second home. Almost half of the five working days were spend in the office.  Air conditioning and lighting are among the most significant contributors to high energy consumption in office building in Malaysia. In promoting an energy efficient building, consumption of electrical lighting and air condition in office from morning till evening requires an investigation. The aim of the research is to explore the environmental condition of office which occupied by design related field employees. The environmental air condition and lighting preference are among the significant variables tested.  A controlled experiment of a mock-up office with combination of those variables was conducted. The findings indicate that the office workers can still perform their task in extreme conditions which are low level of lighting below 200 lux with highest or lowest temperature between 16 to 32 Degree Celsius, however, the percentage of completion (POC) of the AutoCAD drafting task relatively decreasing. This scenarios show that the designers’ office environmental conditions have significant impact towards task performance. The optimum office environmental setting is needed in order to increase employee’s task performance.  

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