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  1. 141
    por Li, Xiao, Chen, Jun, Lin, Zhifang, Ng, Jack
    Publicado 2019
    “…Optical tractor beams, proposed in 2011 and experimentally demonstrated soon after, offer the ability to pull particles against light propagation. …”
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    Optical pulling at macroscopic distances
  2. 142
    “…Field tests were carried out with a lateral tractor-drawn canopy shaker on four commercial plots of sweet oranges. …”
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    Vibration Monitoring of the Mechanical Harvesting of Citrus to Improve Fruit Detachment Efficiency
  3. 143
    por Erenler, Ali Kemal, Gümüş, Burak
    Publicado 2019
    “…Additionally, educational efforts must focus on two-wheelers and tractor drivers, particularly in developing countries.…”
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    Analysis of Road Traffic Accidents in Turkey between 2013 and 2017
  4. 144
    “…This paper analyzes smallholder farmers' willingness to pay (WTP) for the purchase of scale-appropriate farm mechanization in the hill ecologies of Nepal using the case of mini-tiller technology: a small, 5–7 horsepower two-wheel tractor primarily used for agricultural land preparation. …”
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    Smallholder farmers' willingness to pay for scale-appropriate farm mechanization: Evidence from the mid-hills of Nepal
  5. 145
    por Kumar, Deepak, Sodavarapu, Praveen
    Publicado 2020
    “…We reported a 24-year-old female with a right-sided closed complete rupture of the superficial femoral artery without any bone injury and contralateral femoral shaft fracture following riding a bike and hitting by a tractor over both lower limbs. The right thigh and knee were swollen and tender with absent distal pulses without any knee instability. …”
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    Isolated, Closed Superficial Femoral Artery Rupture without Fracture Following Blunt Trauma; A Case Report and Literature Review
  6. 146
    “…However, organic and biodynamic farming showed an accumulation of copper in the under-vine area and in the tractor track, which is problematic for soil fertility in the long-term. …”
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    Spatial Differentiation of Physical and Chemical Soil Parameters under Integrated, Organic, and Biodynamic Viticulture
  7. 147
    “…Finally, farmers who receive more help from family members and own a tractor tend to grow more than one variety in the same production cycle. …”
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    The determinants of common bean variety selection and diversification in Colombia
  8. 148
    “…We found woodland and Organic systems typically perform better than those with no labelling and Red tractor labelling, and that outdoor-bred and outdoor-finished systems perform better than indoor-bred and slatted-finished systems, respectively. …”
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    Advancing the quantitative characterization of farm animal welfare
  9. 149
    por Tekin, Yücel, Kul, Basri, Okursoy, Rasim
    Publicado 2008
    “…To do so, a soil penetrometer was designed, which was mounted on the three-point hitch of an agricultural tractor, consisting of a mechanical system, data acquisition system (DAS), and 2D/3D imaging and analysis software. …”
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    Sensing and 3D Mapping of Soil Compaction
  10. 150
    “…The latter imply CO(2) emissions from diesel fuel and potential soil compaction from tractor journeys. Great progress has been made in the past 25 years in our understanding of the molecular basis of plant disease resistance mechanisms, and of how pathogens circumvent them. …”
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    Elevating crop disease resistance with cloned genes
  11. 151
    “…The architecture presented in this paper is being successfully applied in the RHEA fleet, which comprises three ground mobile units based on a commercial tractor chassis.…”
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    New Trends in Robotics for Agriculture: Integration and Assessment of a Real Fleet of Robots
  12. 152
    “…Acoustic structures shaped as tweezers, twisters or bottles emerge as the optimum mechanisms for tractor beams or containerless transportation. Single-beam levitation could manipulate particles inside our body for applications in targeted drug delivery or acoustically controlled micro-machines that do not interfere with magnetic resonance imaging.…”
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    Holographic acoustic elements for manipulation of levitated objects
  13. 153
    “…We apply this methodology to show experimental examples of acoustic focusing, steering and, after stacking single meta-surfaces into layers, the more complex field of an acoustic tractor beam. We demonstrate experimentally single-sided air-borne acoustic levitation using meta-layers at various bit-rates: from a 4-bit uniform to 3-bit non-uniform quantization in phase. …”
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    Metamaterial bricks and quantization of meta-surfaces
  14. 154
    “…This demonstration highlights a hitherto unnoticed property of classical entanglement and simultaneously offers a device for the on-demand delivery of vector states to targets, for example, for dynamic laser materials processing, switchable resolution within stimulated emission depletion (STED) systems, and a tractor beam for entanglement.…”
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    Entanglement beating in free space through spin–orbit coupling
  15. 155
    “…Both the linear and angular momenta of light can be exploited to produce optical tractor beams, tweezers and optical torque from the microscale to the nanoscale. …”
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    Optical manipulation from the microscale to the nanoscale: fundamentals, advances and prospects
  16. 156
    “…We found that infrastructural work for the Olympic Games in Turin affected NO(2) and PM(10) atmospheric concentrations, determining a peak in the average values during the in-operam period (probably due to caterpillar tractor emissions and excavation). This pattern did not emerge from the Milan data, where a decreasing trend can be seen between the ante-operam and the post-operam periods. …”
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    Preliminary analysis of effects of the 2006 Turin Winter Olympic Games on air quality
  17. 157
    por Klesius, L., Schroeder, K.
    Publicado 2019
    “…We describe a case of bilateral ESP catheters placed intraoperatively after spinal instrumentation in a patient with bilateral rib and spine fractures sustained in a tractor rollover crash. Prior to surgery, the patient had inadequate pain control and poor respiratory function despite multimodal analgesia. …”
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    Effective Analgesia with Bilateral Erector Spinae Plane Catheters for a Patient with Traumatic Rib and Spine Fractures
  18. 158
    “…The ‘high speed’ rotavator is used for shallow tillage to create a fine tilth and incorporate crop residues, often with a single tractor pass. Rotavator tillage has spread quickly in many parts of South Asia, despite short‐term experimental trials suggesting deteriorating soil quality and crop yield penalties. …”
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    Apparent Gains, Hidden Costs: Examining Adoption Drivers, Yield, and Profitability Outcomes of Rotavator Tillage in Wheat Systems in Nepal
  19. 159
    “…We present the case of a 26-year-old man with traumatic degloving of penile and scrotal skin and exposed spongy body, cavernous bodies, and testicles caused by an accident on a farm tractor. The patient was presented to our emergency department 14 hours after his pants getting caught in the rotating driveshaft, which subsequently pulled him at the groin level, whereby the machine grasped the redundant skin of the penis and scrotum. …”
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    Traumatic Degloving Injury of Penile and Scrotal Skin: A Case Report
  20. 160
    por Keller, Thomas, Or, Dani
    Publicado 2022
    “…We developed a global map for delineating subsoil compaction susceptibility based on estimates of mechanization level, mean tractor size, soil texture, and climatic conditions. …”
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    Farm vehicles approaching weights of sauropods exceed safe mechanical limits for soil functioning
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