Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 58 for “"Tractors"”.
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A gear selection aid for agricultural tractors
Call number: LD2668 .T4 ME 1987 M37
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Transient Motion of Tractors on Side Slopes
Made available in DSpace on 2014-12-09T20:03:05Z (GMT). No. of bitstreams: 1 6706696.pdf: 4906611 bytes, checksum: 40adbcb101882ff2487c6f4e13f30c36 (MD5) Previous issue date: 1966
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Variations in the Forward Motion of Farm Tractors
Made available in DSpace on 2015-05-12T22:38:12Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 7500435.PDF: 7784858 bytes, checksum: fbd814b38c3f7635f77b9747d2e24f60 (MD5) Previous issue date: 1974
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Aspects of twistors and tractors in field theory
This thesis is divided into three sections. The first begins with a review of the Fefferman-Graham embedding space construction and the closely-related tractor calculus, which provides a simple way to catalogue and invent conformally invariant operators. In particular, the conformal wave operator …
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The social construction of compatibility: setting voluntary safety standards for agricultural tractors
… of a family of safety standards for agricultural tractors. The study shows that, in setting these standards, participants sought and achieved ways of making their proposed changes in product design more compatible with a changing legal order. The study also shows, however, that collective action …
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Against all odds--successful cases of collective use of tractors in rural Ceará, Brazil
Thesis (M.C.P.)--Massachusetts Institute of Technology, Dept. of Urban Studies and Planning, 1996.
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SUSTAINABILITY OF AGRICULTURAL TRACTORS USAGE IN OPEN FIELD AND IN SPECIALIZED CROPS, FROM THE PERFORMANCE AND ENVIRONMENTAL STANDPOINTS
Nel contesto globale attuale, le problematiche ambientali stanno richiamando sempre più attenzione sugli effetti negativi causati dai veicoli alimentati con combustibili fossili. Tra questi, le macchine agricole semoventi – cioè i veicoli agricoli con motori diesel – hanno un impatto rilevante. …
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Finite element analysis of pre-ROPS tractor axle housing strength
… people from serious injury or death when tractors overturn. Extension agricultural engineers and safety specialists are promoting the retrofitting of ROPS on pre-ROPS tractors. ROPS, meeting to ASAE standards, are available for these older tractors. However, effective protection not only …
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Farm safety and health needs among limited resource farmersin selected counties of North Carolina
… farmers and their workers, such as use of tractors, machinery, and farm chemicals are very high. 2. Farmers between the ages of 36-50 have higher expected injuries compared to other age groups. 3. Training associated with the use of farm tractors, machinery, and personal protective …
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Front underride protection devices: methods for design and testing
… America. North America‟s use of Conventional Tractors also presents a variation to Cab-over Engine Tractors popular in Europe. The distinction presents variations to FUPD design boundary conditions. A three tier design strategy is proposed and implemented in an effort to guide development of …
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Advanced generation NIOSH automatically deployable rollover protective structure (AutoROPS)
… Virginia University. Unfortunately, numerous tractors' operators have removed the factory ROPS from the Tractors because of the lack of housing area on the tractor, which may result in frequent collision between the ROPS and low-hanging tree branches.;One main purpose of this work was to study …
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Starting Ireland on the Road to Industry: Henry Ford in Cork
… though originally designed to manufacture tractors in support of Britain’s war-time food needs, did not commence production until mid-1919, by which time the required tractors had been supplied from the United States. Subsequently, Ford of Cork produced tractors for Britain and Europe until …
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Effects of Heat Addition After the Exhaust Valve on a Small Turbocharged Diesel Engine
… for ways to make everything from cars to road tractors to farm tractors lighter and thereby more efficient. In addition, in many cases these vehicles only need the maximum power that an engine can produce for a small amount of time. What is needed is a small, lightweight engine with the ability …
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Front underride protection devices: design methodology for heavy vehicle crashworthiness
… regulations conform to European Cab-over Engine Tractors designs. Implementation of current regulations in North American conflicts with the widely driven Conventional Style Tractor due to the different design space for a FUPDs. This study builds on developing regulations for North America, and …
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Productivity analysis of private and socialized agriculture in Ethiopia
… labor, land, oxen, traditional farm implements, tractors, machinery services, modern yield·increasing inputs, livestock, education and rainfall over 77 awrajjas for the 1980-1986 production period. A covariance regression model was applied with these data to determine an appropriate functional …
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The role of salience on crowding and visual search in the context of synaesthesia
… colour, or temporal frequency relative to dis tractors. Salience was also measured independently of crowding using the pop out paradigm in visual search. Results showed that stimuli independently defined as salient did escape, in part, from crowding. A following experiment attempted to see …
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Use of transportation relays to improve private fleet management
… private fleet through the purchase of addition tractors and trailers.
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A methodology for turbocharging single cylinder four stroke internal combustion engines
… world off grid power applications such as tractors, generators, and water pumps due to their low cost. Turbocharging these engines could give users a lower cost and more fuel efficient engine. The proposed solution is to add an air capacitor, in the form of a large volume intake manifold, …
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Optimization of a roll over protective structure (ROPS) using nonlinear finite element analysis
… Roll Over Protective Structure CROPS) on farm tractors over the years has saved numerous lives and prevented countless injuries. By removing the ROPS, the tractor operators place themselves in unwarranted danger.;This led the National Institute for Occupational Safety and Health (NIOSH) and …
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Optimization models and algorithms for large-scale, capacity constrained pick-up and delivery problems with time windows
… ranging from custom- built package cars to large tractors and trailers. A crucial point for the profitability of these companies is, for a given level of service, to be able to run their operations at the lowest possible cost. In this thesis, we will contemplate the problem of the scheduling and …
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