Directional drilling systems generate complex curved boreholes in the earth’s crust for the exploration and harvesting of oil, gas and geothermal energy. In practice, boreholes drilled with such systems often show instability-induced borehole spiraling, which negatively affects the borehole quality and increases drag losses while drilling. This paper presents a dynamic state-feedback controller...

Dielectric elastomer generators (DEGs) for harvesting electrical energy from mechanical work have been demonstrated but the energy densities achieved are still small compared with theoretical predictions. In this study, signifi cant improvements in energy density (560 J/kg with a power density of 280 W/ kg and an effi ciency of 27%) are achieved using equi-biaxial stretching, a mechanical loadi...

The main purpose of this study is measuring and comparing of peanut harvesting loss in manual and mechanical methods in addition to economic analysis of them. Hence, a field was selected in Astaneh-Ashrafiyeh and divided to three different plots. Two plots were applied to measure mechanical harvesting loss and third one was applied for manual harvesting loss. According to test results, the lowe...

Conflicts for time and machinery can postpone harvests beyond the initial time when optimum conditions exist. This study was conduced to determine the effects of delaying soybean [Glycine max (L.) Merr.] harvests on grain losses in the field. Field studies were conducted each year from 1983 to 1986 at Arlington, WI. Two cultivars from each of maturity groups (MG) 0, I, and II, one more suscepti...

shipped long distances and supply was dependent on local production areas. Demand for year-round, inexpensive produce has led to consolidation of production where temperatures are warm, sunshine is plentiful, and labor is cheap. In most cases, produce is now shipped long distances before being consumed. Tomatoes grown in Mexico are trucked 3,500 miles, bananas grown in Ecuador travel 6,000 mile...

This paper describes a multi-modal video sensor node designed for low-power and low-cost video surveillance systems, traffic control and people or object tracking based on wireless sensor networks. It is equipped with a solar energy harvesting module which extends the autonomy of the nodes considerably using a solar cell of 70 cm. The developed prototype mounts a CMOS video camera and Pyroelect...

Abstract Forest products and timber harvesting businesses were severely affected by the COVID-19 pandemic. This article describes how forest companies used Paycheck Protection Program (PPP) loans to keep over 487,000 workers in industry on payroll through also summarizes Pandemic Assistance for Timber Harvesters Haulers (PATHH) program, payments provided hauling that experienced losses revenue ...

A total of 1,159 Tiris half-duplex passive injectable transponders (PIT) of 32-mm length were used to study the electronic identification of 618 fattening lambs of two breeds used for different production purposes (Ripollesa, meat breed, n = 271, and Manchega, dairy breed, n = 347). The lambs were s.c. injected in the armpit and the retro-auricular positions at 2, 15, and 30 d of age. All lambs...