Design of solar powered energizer and on-line monitoring of electric fencing system

Author(s):  
M. Anantha Kumar
Author(s):  
Marybeth Lorbiecki

The farm lies about two hours away from the Shack but only historic inches away in concept. In the Driftless region of southwest Wisconsin, it bears upon it some of the beautiful contoured crop swirls of Coon Valley, telltale marks of Leopold’s influence. New Forest Farm, started by Mark and Jen Shepard, is restoration agriculture in action. The farm asks the land to do what it is tailored by nature to do best and then trains it artfully, holistically, and prodigiously for personal, natural, and commercial use. From the sky, it looks like a child’s fingerpainting in green, with curlycues and waves of varying shades, dotted with treetop spheres, winding around ridges and swells. Lovely, biologically diverse, and drought resistant. It has pocket ponds with connective rain-irrigation swales cut into the contours following gradual lines of gravity to disperse captured moisture into the roots and soil for storage. In the face of the worst drought since 1933, this farm stood out lush and lively, though the chestnuts, hazelnuts, and fruit trees produced a reduced harvest, saving their energies for survival. On the spring day we visited, three new shaggy, fawn-colored Highland cattle had just arrived—a mother, son, and calf—along with some new solar-powered electric fencing for pasturing paddocks. “The animals get to know the whole thing,” says Peter Allen, the land manager in his early thirties who expounds on the sequential grazing of the cattle, pigs, sheep, chickens, and turkeys. “They stay for a day in the paddock, and they’re ready to move on to the next when we open the gates.” A PhD student from UW-Madison’s Nelson Institute for Environmental Studies, Allen is applying precepts of wildlife and land ecology to the emerging field of restoration agriculture. He’s also a warm host and knowledgeable tour guide, handing out exciting details like the intoxicating cider made here.


IEEE Access ◽  
2019 ◽  
Vol 7 ◽  
pp. 86168-86176 ◽  
Author(s):  
Luqiang Shi ◽  
Yigang He ◽  
Bing Li ◽  
Tongtong Cheng ◽  
Yuan Huang ◽  
...  

1980 ◽  
Vol 26 (94) ◽  
pp. 65-74 ◽  
Author(s):  
H. Gubler

AbstractStability indices at different slope aspects and characteristic parameters describing the snow cover and the weather conditions are recorded simultaneously and automatically in potential fracture zones of avalanches during the whole winter season. A remote, solar-powered system including measurements of snow depth, mass flux of wind-blown snow and of the snow temperature profile as well as on-line and off-line data processing has been developed and tested. The results show that this type of data-recording and processing system makes quantitative case studies of natural stability variations possible.


2021 ◽  
Vol 2 (1) ◽  
pp. 80
Author(s):  
Wegig Murwonugroho ◽  
Setia Gunawan ◽  
Astri Rinanti

<p>The problems generally faced by farmers are that vegetables easily rotting due to delayed selling time and higher hygienic standard of vegetables. Based on an interview, we acknowledge that the farmers are unable to understand the utilization of ultraviolet irradiation technology. UV irradiation facilities - which help kills various types of bacteria, spores, protozoan viruses and algae - should be placed near vegetable harvest location. The physical part of vegetables requires special attention and they should not be moved on a regular basis to prevent damages. However, the harvest location is quite distant from electricity sources. As a solution to overcome this problem, a solar powered UV irrayer facility equipped with a portable bag is required. Besides that, the tool should be fitted with branded plastic casings to hold the vegetable to improve selling value, safety, and readiness of the vegetables. The objective of the utilization of this appropriate technology is to improve the quality of the harvested crops. Vegetables will be free from bacteria and risks of Covid-19 exposures. The target of this program is to improve vegetable selling sales rate and to improve the prosperity of the farmers better, or at least as high as pre-pandemic era. The method used to procure this appropriate technology is a design thinking method that covers empathy, define, ideate, prototype, and testing. The implementation of the counseling and training activities were conducted on-line and off-line whilst also applying a strict health protocol. The activity was conducted for 4 months.</p>


1980 ◽  
Vol 26 (94) ◽  
pp. 65-74 ◽  
Author(s):  
H. Gubler

AbstractStability indices at different slope aspects and characteristic parameters describing the snow cover and the weather conditions are recorded simultaneously and automatically in potential fracture zones of avalanches during the whole winter season. A remote, solar-powered system including measurements of snow depth, mass flux of wind-blown snow and of the snow temperature profile as well as on-line and off-line data processing has been developed and tested. The results show that this type of data-recording and processing system makes quantitative case studies of natural stability variations possible.


2017 ◽  
Vol 140 (3) ◽  
Author(s):  
Pulkit Shamshery ◽  
Amos G. Winter

This study presents the design and validation of on-line pressure-compensating (PC) drip irrigation emitters with a substantially lower minimum compensating inlet pressure (MCIP) than commercially available products. A reduced MCIP, or activation pressure, results in a drip irrigation system that can operate at a reduced pumping pressure, has lower power and energy requirements, requires a lower initial capital cost, and facilitates solar-powered irrigation systems. The technology presented herein can help spread drip irrigation to remote regions and contribute to reducing poverty, particularly in developing countries. The activation pressures of drip emitters at three flow rates were minimized using a genetic algorithm (GA)-based optimization method coupled with a recently published fluid–structure interaction analytical model of on-line PC drip emitter performance. The optimization took into account manufacturing constraints and the need to economically retrofit existing machines to manufacture new emitters. Optimized PC drip emitter designs with flow rates of 3.3, 4.2, and 8.2 lph were validated using precision machined prototype emitters. The activation pressure for all was ≤0.2 bar, which is as low as 16.7% that of commercial products. A limited production run of injection molded 8.2 lph dripper prototypes demonstrated they could be made with conventional manufacturing techniques. These drippers had an activation pressure of 0.15 bar. A cost analysis showed that low MCIP drip emitters can reduce the cost of solar-powered drip irrigation systems by up to 40%.


Author(s):  
William Krakow

In the past few years on-line digital television frame store devices coupled to computers have been employed to attempt to measure the microscope parameters of defocus and astigmatism. The ultimate goal of such tasks is to fully adjust the operating parameters of the microscope and obtain an optimum image for viewing in terms of its information content. The initial approach to this problem, for high resolution TEM imaging, was to obtain the power spectrum from the Fourier transform of an image, find the contrast transfer function oscillation maxima, and subsequently correct the image. This technique requires a fast computer, a direct memory access device and even an array processor to accomplish these tasks on limited size arrays in a few seconds per image. It is not clear that the power spectrum could be used for more than defocus correction since the correction of astigmatism is a formidable problem of pattern recognition.


Author(s):  
A.M.H. Schepman ◽  
J.A.P. van der Voort ◽  
J.E. Mellema

A Scanning Transmission Electron Microscope (STEM) was coupled to a small computer. The system (see Fig. 1) has been built using a Philips EM400, equipped with a scanning attachment and a DEC PDP11/34 computer with 34K memory. The gun (Fig. 2) consists of a continuously renewed tip of radius 0.2 to 0.4 μm of a tungsten wire heated just below its melting point by a focussed laser beam (1). On-line operation procedures were developped aiming at the reduction of the amount of radiation of the specimen area of interest, while selecting the various imaging parameters and upon registration of the information content. Whereas the theoretical limiting spot size is 0.75 nm (2), routine resolution checks showed minimum distances in the order 1.2 to 1.5 nm between corresponding intensity maxima in successive scans. This value is sufficient for structural studies of regular biological material to test the performance of STEM over high resolution CTEM.


Author(s):  
Neil Rowlands ◽  
Jeff Price ◽  
Michael Kersker ◽  
Seichi Suzuki ◽  
Steve Young ◽  
...  

Three-dimensional (3D) microstructure visualization on the electron microscope requires that the sample be tilted to different positions to collect a series of projections. This tilting should be performed rapidly for on-line stereo viewing and precisely for off-line tomographic reconstruction. Usually a projection series is collected using mechanical stage tilt alone. The stereo pairs must be viewed off-line and the 60 to 120 tomographic projections must be aligned with fiduciary markers or digital correlation methods. The delay in viewing stereo pairs and the alignment problems in tomographic reconstruction could be eliminated or improved by tilting the beam if such tilt could be accomplished without image translation.A microscope capable of beam tilt with simultaneous image shift to eliminate tilt-induced translation has been investigated for 3D imaging of thick (1 μm) biologic specimens. By tilting the beam above and through the specimen and bringing it back below the specimen, a brightfield image with a projection angle corresponding to the beam tilt angle can be recorded (Fig. 1a).


Author(s):  
G.Y. Fan ◽  
J.M. Cowley

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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