Bibliographies thématiques / Harvesting methods

Littérature scientifique sur le sujet « Harvesting methods »

Auteur : Grafiati
Publié le 10 mars 2023

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Articles de revues sur le sujet "Harvesting methods"

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Perepravo, Nikolaj, Vladimir Zolotarev, Aleksej Ševcov, Jurij Ahlamov, Sergej Otroško, Nikolaj Šarikov, Vladimir Kosolapov, Andrzej Marczuk et Jacek Caban. « Improvement of Harvesting Methods of Perennial Seed Grass ». Agricultural Engineering 20, no 4 (1 décembre 2016) : 167–73. http://dx.doi.org/10.1515/agriceng-2016-0074.

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Abstract In case of traditional harvesting methods the losses of perennial grass seeds may reach 45-50% of the biological yield in unfavourable weather conditions. The paper presents the results of comparative assessment efficiency of various methods of harvesting of perennial seed grass. It was found that the use of special devices and structures in combine harvesters allows increase of yield of technological mixture to the combine tank, degree of seed threshing to 93% and limit the losses of crop to 20-29%. Harvesting of seeds in non-waste technology with harvesting of the entire yield with later transport, drying, threshing and seeds cleaning in stationary devices results in reduction of losses by 5 to 10% but it leads to the increase of energy inputs by 24-25% in comparison to traditional with threshing method. Harvesting with a combing method of plant seeds on a trunk in „Невейки” technology results in the increase of the seeds harvesting to 86-98% of a biological yield.
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Siira-Pietikäinen, Anne, Janna Pietikäinen, Hannu Fritze et Jari Haimi. « Short-term responses of soil decomposer communities to forest management : clear felling versus alternative forest harvesting methods ». Canadian Journal of Forest Research 31, no 1 (1 janvier 2001) : 88–99. http://dx.doi.org/10.1139/x00-148.

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We studied the short-term responses of decomposers to different forest harvesting methods in a boreal spruce forest (Picea abies (L.) Karst.). We hypothesised that the less intensive the forest harvesting method is, the fewer changes occur in the decomposer community. The treatments, in addition to untreated controls, were (1) selection felling (30% of the stand volume removed), (2) retention felling (tree patches retained), (3) clear felling, (4) gap felling without and (5) with harrowing. Microbial community structure (phospholipid fatty acids (PLFA) pattern) changed in the first year, microbial biomass and basal respiration decreased in the second year, and density of the enchytraeid worm Cognettia sphagnetorum (Vejd.) increased in the third year after the clear felling. The community of collembolans did not respond to forest harvestings. Although there were changes in the microbial community, the invertebrates at higher trophic levels did not parallelly respond to these changes. The selection felling had no influence on the decomposers, while the gap fellings induced an increase in the numbers of enchytraeids in harvested gaps. We conclude that the decomposers of the coniferous forest soils are well buffered against initial environmental changes resulting from forest harvesting, and also that the PLFA pattern is a sensitive indicator of changes in the microbial community induced by forest harvesting.
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SEKI, Masahiro, Naotaka HAYASHI et Shoji MORIIZUMI. « Study on Chinese yam harvesting works 1. Many kinds of harvesting methods. » Japanese Journal of Farm Work Research 29, no 1 (1994) : 28–37. http://dx.doi.org/10.4035/jsfwr.29.28.

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Byblyuk, N., O. Styranivsky, V. Korzhov et V. Kudra. « Timber harvesting in the ukrainian carpathians : Ecological problems and methods to solve them ». Journal of Forest Science 56, No. 7 (26 juillet 2010) : 333–40. http://dx.doi.org/10.17221/111/2009-jfs.

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The paper contains results of comparative investigations of crawler and wheeled skidders regarding their effect on soil surface, undergrowth and rut formation during mountain timber harvesting. It was shown that the extent of erosion resulting from damage to the soil surface depends on the steepness and length of slopes during both construction of skidding tracks and skidding by tractors. Considering the current condition of development of timber harvesting machinery, the use of crawler machines is the main method for transportation of cargos in regions with difficult access.
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Kluender, Richard A., et Bryce J. Stokes. « Productivity and Costs of Three Harvesting Methods ». Southern Journal of Applied Forestry 18, no 4 (1 novembre 1994) : 168–74. http://dx.doi.org/10.1093/sjaf/18.4.168.

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Abstract Three stands were harvested by either clearcut, shelterwood, or single-tree selection methods. The single-tree selection method consisted of a light thinning in an even-aged stand as the initial basal area reduction cut required to convert the stand to uneven-aged structure. The contractor used two skidders (one grapple, one choker) and production chain saws to harvest all three tracts. Harvested sites were all similar in slope (10-15%), average dbh (12-14 in.), and preharvest number of stems by dbh. In the felling study, fell, walk, and limb-top time were all greater for the single-tree selection method. Time to process a tree was lowest for the clearcut, intermediate for shelterwood, and highest for single-tree selection method. For skidding, bunch building time was highest for the single-tree selection and lowest for the clearcut method. Average volume per cycle was consistently higher for the grapple skidder than the choker skidder; volume per cycle was lowest for the single-tree selection and highest for the clearcut method for both skidders. Time per cycle was consistently lower for the grapple skidder than the cable skidder. Time per cycle was lowest for the clearcut and highest for the single-tree selection method. Factors that affected felling productivity (in decreasing order) were: dbh of harvested stems, intertree distance, and method of harvest. Factors that affected skidding productivity (in decreasing order) were: skidder type, pull distance, average volume per cycle, and the method of harvest. Costs of felling and skidding were highest on the single-selection stand and lowest on the clearcut stand. Total percentage of stand area trafficked was lowest for the single tree stand. However, the total area disturbed to meet a wood procurement budget was lowest for the clearcut and highest for the single-tree method. South. J. Appl. For. 18(4): 168-174.
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BOUMAIZ, Marwa, M. EL GHAZI, S. MAZER, M. FATTAH, A. BOUAYAD, M. EL BEKKALI et Y. BALBOUL. « Energy harvesting based WBANs : EH optimization methods ». Procedia Computer Science 151 (2019) : 1040–45. http://dx.doi.org/10.1016/j.procs.2019.04.147.

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Pirwitz, Kristin, Liisa Rihko-Struckmann et Kai Sundmacher. « Comparison of flocculation methods for harvesting Dunaliella ». Bioresource Technology 196 (novembre 2015) : 145–52. http://dx.doi.org/10.1016/j.biortech.2015.07.032.

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Griffin, S. M., D. Alderson et J. R. Farndon. « Comparison of harvesting methods for islet transplantation ». British Journal of Surgery 73, no 9 (septembre 1986) : 712–15. http://dx.doi.org/10.1002/bjs.1800730913.

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Wang, Guofu, Wei Zhang, Xingliang Diao, Min Ji, Benhua Fei et Hu Miao. « Analysis of Harvesting Methods of Moso Bamboo ». Buildings 13, no 2 (29 janvier 2023) : 365. http://dx.doi.org/10.3390/buildings13020365.

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Bamboo is widely used as an excellent engineering material in construction and furniture. The harvesting equipment and the bamboo application process need to be integrated better. According to the application requirements of the original bamboo structure building, the mechanism and practical experience of bamboo harvesting were analyzed using field experiments in bamboo forests and the finite element method. The operation stability and the side-face planeness of the saw were the direct factors affecting bamboo cutting quality. Further, the indirect factors were the clamp saw effect on the cutting surface, the hollow structure and diaphragm of bamboo, the density and moisture, and the swarf pocket.
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Ghaffariyan, Mohammad Reza, et Eloïse Dupuis. « Analysing the Impact of Harvesting Methods on the Quantity of Harvesting Residues : An Australian Case Study ». Forests 12, no 9 (6 septembre 2021) : 1212. http://dx.doi.org/10.3390/f12091212.

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Many parameters can influence the weight of harvesting residues per hectare that remain on plantation sites after extracting sawlogs and pulpwoods. This study aimed at quantifying the impact of the cut-to-length and whole-tree harvesting methods on the weight of harvesting residues using 26 case studies in Australian plantations. A database was created using case studies conducted in different plantations, to measure the weight of harvesting residues per hectare and the components of harvesting residues. An analysis of variance was applied to test the impact made by the harvesting methods. The results confirmed that the cut-to-length harvesting method produced a larger weight of residues (104.0 tonnes of wet matter per hectare (tWM/ha) without additional biomass recovery and 64.7 tWM/ha with additional biomass recovery after sawlog/pulpwood extraction) than the whole-tree harvesting method (12.5 tWM/ha). The fraction test showed that stem wood formed the largest proportion of the harvesting residues in cut-to-length sites and needles were the largest component of the pine harvesting residues in sites cleared by the whole-tree harvesting method. The outcomes of this study could assist plantation managers to set proper strategies for harvesting residues management. Future research could study the impact of product type, silvicultural regime, stand quality, age, equipment, etc., on the weight of harvesting residues.
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Thèses sur le sujet "Harvesting methods"

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JANA, SOURAV KANTI. « Light harvesting methods in photovoltaic devices with superficial treatments ». Doctoral thesis, Università degli Studi di Milano-Bicocca, 2012. http://hdl.handle.net/10281/28621.

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Photovoltaics is fast emerging as an attractive renewable energy technology due to concerns of global warming, pollution and scarcity of fossil fuels supplies. However to compete in the global energy market, solar cells need to be cheaper and more energy efficient. Silicon is the favourite semiconductor used in solar photovoltaic cells because of its abandoned in nature, well established technology and non toxicity. But due to its indirect band gap, silicon is poor absorber of light and theoretical limiting efficiency of single junction wafer based silicon solar cells is ~31% which is called Shockley Queisser limit. But up to now the maximum achievable efficiency in laboratory for single crystal single junction silicon solar cells is ~ 24.7%. So far the cost of the wafer based silicon photovoltaics is high. Also thin film cells play an important role in low cost photvoltaics, but efficiency of the cost reduced cells is lower compared to wafer based cells. So light trapping into photovoltaic cells is a great issue inorder to increase the carrier generation inside the active layer of both bulk as well as thin film cells with out disturbing their fabrication technology. There many light harvesting methods; among them Surface Plasmon method using metal nanoparticles and spectrum downshifting method using nanocrystals are discussed here. Metal nanoparticles support surface plamson when light is incident on them, which cause the scatter light into the underlying substrate. This process is realized on standard silicon solar cells. The feasible light scattering related enhancement was examined using spectral response and I-V measurements. Relative increases of the total delivered power under simulated solar irradiation were observed for cells both with and without antireflection coating using both silver and gold nanoparticles. The relative enhancement of External Quantum Efficiency derived from the spectral response measurements was observed for both the silicon cells. The better results obtained from both spectral response and I-V measurements were ascribed in the case of cells without antireflection coating. The results from I-V measurements under Air Mass 1.5 irradiation on the cells (without antireflection coating) correspond to a clear increase of the short circuit current due to both silver (relative increase of 7.5%) and gold (relative increase of 6.1%) nanoparticles. Also there is a relative enhancement (1.5%) of short circuit current was ascribed in the cells (with antireflection coating). Further realization of this method on copper indium gallium selenide based thin film solar cells attributed the enhancement of external quantum efficiency in the red wavelength region where these cells have already a poor spectral response. Spectral downshifting method by the nanocrystals was investigated on the silicon based solar cells. Down shifting of photons on the silicon solar cells is realized by the absorption and emission property of the manganese doped zinc sulfide nanocrystals. The variation of band gap and photoluminescence intensity of different nanocrystals due to different doping concentration was observed. Relative enhancement of External Quantum Efficiency has been attributed in UV region (where silicon solar cells have poor spectral response) due to lower concentration of nanocrystals. A strong concentration quenching effect which causes decrease of external quantum efficiency in both UV and visible region has been observed.
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Cerney, Dawna Lynn. « Two methods of harvesting native grass community seed ». Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape4/PQDD_0015/MQ48244.pdf.

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Blanchard, Jonathan Peter. « Rainwater Harvesting Storage Methods and Self Supply in Uganda ». Scholar Commons, 2012. http://scholarcommons.usf.edu/etd/3979.

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Self supply is an emerging approach to water supply which focuses on fostering household investment in incremental improvements to their water sources. When successful, it can lower costs and increase sustainability by offering users a larger share of ownership in their own supply, and harnessing the already existing strengths of a community rather than trying to impose an external perspective. In addition to well upgrading and source protection, one of the key self supply areas is rainwater harvesting. Uganda has a diverse selection of rainwater storage options, but many of them are scattered and disparate. The objective of this study was to create a comprehensive collection of well-established Ugandan rainwater storage options, and to demonstrate the geographical disparities in availability, particularly for Rakai District, where the author lived and worked as a Water and Sanitation Engineer for two years. Data was gathered by interviewing key stakeholders in rainwater harvesting at the national, regional, and district level in order to gather their collective knowledge in rainwater harvesting storage techniques. In order to understand the availability and pricing of manufactured products, a survey of Rakai District hardware stores determined the prices and range of volumes at which different manufactured products were available. The study found 11 distinct technologies widely used for rainwater storage: three informal or traditional, three manufactured, and five built-in-place by skilled artisans. The traditional/informal technologies consisted of clay pots, pots and basins, and brick mortar tanks. The manufactured products were plastic tanks ranging from 60 to 24,000 liters, corrugated iron tanks, and 55-gallon metal drums. The built-in-place tank technologies were mortar jars, tarpaulin tanks, ferrocement tanks, partially below ground ferrocement tanks, and interlocking stabilized soil brick tanks. The study also found that while the manufactured products are well distributed, built-in-place options have not spread beyond where they were originally introduced by NGO's trying to promote certain technologies. With regard to costs, tanks with storage volume less than 1,000 liters had costs that ranged from 182 to 724 UGX/liter, with small plastic tanks being least expensive. For volumes between 1,000 and 10,000 liters, costs ranged between 42 and 350 UGX/liter, with tarpaulin tanks providing the largest storage per unit cost. Above 10,000 liters of storage, tanks ranged from 35 to 341 UGX/liter, with tarpaulin tanks again ranking first by cost per unit volume. In order for self supply to flourish, these technologies need to be implemented in such a way that fosters a thriving private sector and independent uptake of rainwater harvesting. This research provides a starting point by laying out the technologies, costs, and volumes available.
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Lenhard, Allison N. « Review of energy harvesting methods for twin screw extruders ». Thesis, Massachusetts Institute of Technology, 2020. https://hdl.handle.net/1721.1/127922.

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Thesis: S.B., Massachusetts Institute of Technology, Department of Mechanical Engineering, May, 2020
Cataloged from the official PDF of thesis.
Includes bibliographical references (pages 44-48).
Energy harvesting is the process of accumulating and storing energy from residual sources for use in powering electronic devices. Low-power energy harvesting technologies typically utilize either mechanical, thermal, radiation, flow-based, or bio-chemical energy sources. Research in low-power energy harvesting technologies is motivated by an increased interest in the Internet of Things and the need to create isolated electronic systems, such as wireless sensor networks for system monitoring. Twin screw extruders are a type of extrusion processing machinery and could benefit from a condition monitoring system. Implementing a condition monitoring system for a twin screw extruder can prevent wasting materials, producing unusable products, and working extensively on machine maintenance. However, it becomes difficult to integrate a condition monitoring system into the machinery because of the lack of accessibility. Condition monitoring would have to occur in the process section of the twin screw extruder, but the nature of the process section makes it difficult to implement a traditionally wired and powered condition monitoring system. A condition monitoring system powered by energy harvesting techniques would be ideal for a twin screw extruder. The shaft mechanical vibrations, high temperature thermal dissipation, and polymer fluid dynamics present in a twin screw extruder can potentially be used in an energy harvesting system. After a literature review, mechanical vibrations and temperature gradients were regarded as the best potential energy harvesting drivers. Based on preliminary analysis of the system, vibrational energy harvesting is predicted to produce between 3.35-16.75 mW of power, while thermally driven energy harvesting is expected to produce between 8-15 mW of power. The estimated power output would be significant enough to power a low-power consumption strain sensor and has the potential to power other sensors as well.
by Allison N. Lenhard.
S.B.
S.B. Massachusetts Institute of Technology, Department of Mechanical Engineering
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Grozdanovski, Tatjana, et Tatjana grozdanovski@rmit edu au. « Multi-scaling methods applied to population models ». RMIT University. Mathematical and Geospatial Sciences, 2009. http://adt.lib.rmit.edu.au/adt/public/adt-VIT20091130.102832.

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This dissertation presents several applications of the multi-scaling (multi-timing) technique to the analysis of both single and two species population models where the defining parameters vary slowly with time. Although exact solutions in such cases would be preferred, they are almost always impossible to obtain when slow variation is involved. Numerical solutions can be obtained in these cases, however they are often time consuming and offer limited insight into what is causing the behaviour we see in the solution. Here an approximation method is chosen as it gives an explicit analytic approximate expression for the solutions of such population models. The multi-scaling method was chosen because the defining parameters are varying slowly compared to the response of the system. This technique is well-established in the physical and engineering sciences literature; however, it has rarely been applied in the area of population modelling. All single species differential equation population models incorporate parameters which define the model - for example, the growth rate r and the carrying capacity k, for the Logistic model. For constant parameter values an exact solution may be found, giving the population as a function of time. However, for arbitrary time-varying parameters, exact solutions are rarely possible, and numerical solution techniques must be employed. Here we will demonstrate that for a Logistic model where the growth rate and carrying capacity both vary slowly with time, an analysis with multiple time scales leads to approximate closed form solutions that are explicit. These solutions prove to be valid for a range of parameter values and compare favourably with numerically generated ones.
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Eriksson, Jesper, et Shwana Piroti. « Review of Methods for Energy Harvesting from a Vehicle Suspension System ». Thesis, KTH, Skolan för teknikvetenskap (SCI), 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-223215.

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With the increasing population the energy consumption has increased which makes the requirement for clean energy important, now more than ever. The transport sector is one of the biggest contributors to this consumption and should therefore be taken into consideration when looking for environmentally friendly solutions. The majority of fuel energy in road-bound vehicles of today is dissipated and is therefore never utilized. For a passenger car traveling at 13.4 m/s it is found that 200 W worth of energy is lost in the vehicles suspension system. The purpose of this work is to analyze and evaluate existing methods for energy regeneration from vehicle suspension systems in order to identify the most optimal solution. To end with, the report will propose mathematical models for simulations of the chosen system. This report examines electrostatic, piezoelectric and electromagnetic methods of energy regenera- tion and it is concluded that electromagnetic generators are the most viable when applied to vehicles. Furthermore, already existing ideas for regenerative suspension systems using electromagnetic generators are explained and compared. It is concluded that a suspension system using an electromagnetic generator coupled with a magneto-rheological (MR) damper is the most optimal when looking at e-ciency, cost, robustness and environmental impact. It can generate up to 90 W and is shown to be the most robust system because of its few moving parts. The working principle of the regenerative electromagnetic MR damper is explained and mathematical models describing the characteristics of the MR damper and the electromagnetic generator, based on previous work, are proposed. A simulation model using a quarter-car model is also proposed where dierent methods of road prole generation are suggested. The environmental aspects of the regenerative MR damper is conclusively discussed and evaluated so that the overall environmental performance of the system can be decided.
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Thiffault, Évelyne. « Biogeochemistry of forest harvesting methods in the boreal zone of Quebec ». Thesis, Université Laval, 2006. http://www.theses.ulaval.ca/2006/24124/24124.pdf.

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Singh, Raymond Charan. « Modeling Energy Harvesting From Membrane Vibrations using Multi-physics Modeling ». Thesis, Virginia Tech, 2012. http://hdl.handle.net/10919/76793.

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Given the ever-growing need for device autonomy and renewable sources of energy, energy harvesting has become an increasingly popular field of research. This research focuses on energy harvesting using the piezoelectric effect, from vibrating membrane structures by converting mechanical energy into electric energy. Specific applications of this research include powering components of bio-inspired micro air vehicles (MAVs), which require long range with as little regular maintenance as possible, and powering sensors for structural health monitoring on otherwise inaccessible locations (the roof of the Denver Int'l Airport is a good example). Coming up with an efficient, high-fidelity model of these systems allows for design optimization without the extensive use of experimental testing, as well as a deeper understanding of the physics involved. These are the twin goals of this research. This work describes a modeling algorithm using COMSOL, a multi-physics software, to predict the structural mechanics of and subsequent power harvested from a piezoelectric patch placed on a prestressed membrane structure. The model is verified by an FE comparison of the modeled system's dynamic response. For a 0.5 x 0.5 x 0.001 m nylon membrane with a 0.1 x 0.1 x 0.001 m piezoelectric patch placed on its corner, a maximum power output of ~10 microwatts was achieved, using a resistance of 100 Ohms and exciting the system around resonance. When the patch was placed on the side of the membrane, the power output was ~100 milliwatts. The ultimate goal is to estimate the energy harvested by a network of these piezoelectric patches and optimize the harvesting system based on the size, shape and location of the patches.
Master of Science
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Wang, Yafang [Verfasser], et Gerhard [Akademischer Betreuer] Weikum. « Methods and tools for temporal knowledge harvesting / Yafang Wang. Betreuer : Gerhard Weikum ». Saarbrücken : Saarländische Universitäts- und Landesbibliothek, 2013. http://d-nb.info/1052779883/34.

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Griffin, S. Michael. « Islet tissue autotransplantation - harvesting methods and long-term assessment of graft function ». Thesis, University of Newcastle Upon Tyne, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.329157.

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Livres sur le sujet "Harvesting methods"

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Elvin, Niell, et Alper Erturk, dir. Advances in Energy Harvesting Methods. New York, NY : Springer New York, 2013. http://dx.doi.org/10.1007/978-1-4614-5705-3.

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Elvin, Niell. Advances in Energy Harvesting Methods. New York, NY : Springer New York, 2013.

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Edwin, Smith. Methods of fruit picking and handling. Victoria, B.C : W.H. Cullin, 1997.

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P, Karrfalt Robert, et Mason Mary E, dir. Methods for collecting ash (Fraxinus spp.) seeds. Newtown Square, Pa : United States Department of Agriculture, Forest Service, Northern Research Station, 2010.

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Bjorkbom, John C. Allegheny hardwood regeneration reponse to even-age harvesting methods. [Broomall, Pa.] : U.S. Dept. of Agriculture, Forest Service, Northeastern Forest Experiment Station, 1986.

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Olsen, Eldon D. Statistical comparison of methods used in harvesting work studies. Corvallis, Or : College of Forestry, Forest Research Laboratory, Oregon State University, 1998.

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K, Crone Lisa, Alexander Susan 1956- et Pacific Northwest Research Station (Portland, Or.), dir. A U.S. Forest Service special forest products appraisal system : Background, methods, and assessment. Portland, OR : U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Research Station, 2010.

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Tomala, Kazimierz. Prognozowanie zdolności przechowalniczej i wyznaczanie terminu zbioru jabłek. Warszawa : Rozwój SGGW, 1995.

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Marx, Robert E. Atlas of oral and extraoral bone harvesting. Hanover Park, IL : Quintessence Pub., 2010.

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Marx, Robert E. Atlas of oral and extraoral bone harvesting. Hanover Park, IL : Quintessence Pub., 2010.

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Chapitres de livres sur le sujet "Harvesting methods"

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Condemine, Cyril, Jérôme Willemin, Guy Waltisperger et Jean-Frédéric Christmann. « Design Methods for Energy Harvesting ». Dans Design Technology for Heterogeneous Embedded Systems, 389–409. Dordrecht : Springer Netherlands, 2012. http://dx.doi.org/10.1007/978-94-007-1125-9_18.

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Pathomvanich, Damkerng. « Other Methods of Donor Harvesting ». Dans Hair Restoration Surgery in Asians, 117–20. Tokyo : Springer Japan, 2010. http://dx.doi.org/10.1007/978-4-431-99659-0_24.

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Haddad, N. I., A. B. Salkini, P. Jagatheeswaran et B. A. Snobar. « Methods of harvesting pulse crops ». Dans World crops : Cool season food legumes, 341–50. Dordrecht : Springer Netherlands, 1988. http://dx.doi.org/10.1007/978-94-009-2764-3_31.

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Tang, Lihua, Yaowen Yang et Chee Kiong Soh. « Broadband Vibration Energy Harvesting Techniques ». Dans Advances in Energy Harvesting Methods, 17–61. New York, NY : Springer New York, 2013. http://dx.doi.org/10.1007/978-1-4614-5705-3_2.

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Elvin, Niell, et Alper Erturk. « Introduction and Methods of Mechanical Energy Harvesting ». Dans Advances in Energy Harvesting Methods, 3–14. New York, NY : Springer New York, 2013. http://dx.doi.org/10.1007/978-1-4614-5705-3_1.

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Jenkins, Linda L., et Karen J. L. Burg. « Tissue Harvesting and Fixation ». Dans Handbook of Histology Methods for Bone and Cartilage, 143–57. Totowa, NJ : Humana Press, 2003. http://dx.doi.org/10.1007/978-1-59259-417-7_8.

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Akaydın, Hüseyin Doğuş, Niell Elvin et Yiannis Andreopoulos. « Flow-Induced Vibrations for Piezoelectric Energy Harvesting ». Dans Advances in Energy Harvesting Methods, 241–67. New York, NY : Springer New York, 2013. http://dx.doi.org/10.1007/978-1-4614-5705-3_10.

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De Marqui, Carlos, et Alper Erturk. « Airfoil-Based Linear and Nonlinear Electroaeroelastic Energy Harvesting ». Dans Advances in Energy Harvesting Methods, 269–94. New York, NY : Springer New York, 2013. http://dx.doi.org/10.1007/978-1-4614-5705-3_11.

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Wu, Liang-Yu, Lien-Wen Chen, I.-Ling Chang et Chun-Chih Wang. « Acoustic Energy Harvesting Using Sonic Crystals ». Dans Advances in Energy Harvesting Methods, 295–319. New York, NY : Springer New York, 2013. http://dx.doi.org/10.1007/978-1-4614-5705-3_12.

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Burrow, S. G., P. D. Mitcheson et B. H. Stark. « Power Conditioning Techniques for Energy Harvesting ». Dans Advances in Energy Harvesting Methods, 323–43. New York, NY : Springer New York, 2013. http://dx.doi.org/10.1007/978-1-4614-5705-3_13.

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Actes de conférences sur le sujet "Harvesting methods"

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Schlichting, Alexander, Rashi Tiwari et Ephrahim Garcia. « Combined AC and DC Energy Harvesting Methods ». Dans ASME 2010 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. ASMEDC, 2010. http://dx.doi.org/10.1115/smasis2010-3778.

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Much of the work on ambient energy harvesting currently focuses on maximizing the efficiency of the power extraction method or increasing the power output. However, an important goal is still out of reach: to produce sufficient and sustained power for wireless sensor nodes and their associated components. Achieving this goal will significantly impact the fields of structural health monitoring, secure location surveillance and a multitude of other pertinent applications. While many energy harvesters can power these electronics with a constant energy source, most ambient sources for desired wireless sensor networks only provide intermittent energy. One method for increasing the robustness and versatility of energy harvesting systems would utilize multiple energy sources simultaneously. In order to achieve this, the problem of effectively combining multiple energy harvesting sources, specifically an AC and a DC source, is thoroughly explored with the experimental analysis of proposed circuit configurations. Also, a multi-source energy harvesting circuit configuration is proposed.
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Clemente Conte, Ignacio, Juan José Ibáñez Estévez, Juan Francisco Gibaja Bao, Niccolò Mazzucco, Xavier Terradas, Millan Mozota Holgueras et Ferran Borrell. « Cereal Use-wear Traces and Harvesting Methods ». Dans SUBSISTENCE STRATEGIES IN THE STONE AGE, DIRECT AND INDIRECT EVIDENCE OF FISHING AND GATHERING. Institute for the History of Material Culture Russian Academy of Science, 2018. http://dx.doi.org/10.31600/978-5-907053-00-7-2018-192-194.

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Gieva, Elitsa Emilova, Krasimir Ivanov Nedelchev, Ivan Mladenov Kralov et Ivelina Nikolaeva Ruskova. « Analyses of Energy Harvesting Methods and Devices for Use in Transport Noise Harvesting ». Dans 2019 X National Conference with International Participation (ELECTRONICA). IEEE, 2019. http://dx.doi.org/10.1109/electronica.2019.8825649.

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Zhitomirsky, I. « New Methods for the Fabrication of Composites for Supercapacitor Electrodes with High Active Mass Loading ». Dans International Conference of Energy Harvesting, Storage, and Transfer. Avestia Publishing, 2018. http://dx.doi.org/10.11159/ehst18.1.

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Zolotarev, Vladimir. « BIOLOGICAL JUSTIFICATION OF METHODS FOR HARVESTING SEED GRASSES ». Dans Multifunctional adaptive feed production. ru : Federal Williams Research Center of Forage Production and Agroecology, 2020. http://dx.doi.org/10.33814/mak-2020-22-70-78-90.

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The analysis of the main reason for the loss of the birdsfoot trefoil seed yield — destruction of beans. It was found that the biological yield of seeds reached its maximum values in the range of 308–320 kg/ha when 69–93% of the beans were browned, or 35–50 days after the beginning of flowering. The optimal period of direct threshing with pre-desiccation of the herbage with Reglon Super at a dose of 4 l / ha is a period of Browning of about 70% of the beans. This ensures the highest actual seed harvest of 191–206 kg/ha.
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Podolskaya, E. E., I. S. Belimenko et V. O. Marchenko. « MECHANIZED HARVESTING OF FRUITS AND BERRIES : MACHINES AND TEST METHODS ». Dans STATE AND DEVELOPMENT PROSPECTS OF AGRIBUSINESS. DSTU-PRINT, 2020. http://dx.doi.org/10.23947/interagro.2020.1.718-722.

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The article analyzes the methods of harvesting fruits and berries, provides agrotechnical requirements and classification of the corresponding type of machines, and reflects the features of their application. The comparative characteristics of the most common machines for harvesting fruits and berries are given, and the current and developing regulatory documents for testing methods of this agricultural equipment are noted.
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Santos, Paulo Eugenio da Silva, et Reyolando Manoel Lopes Rebello da Fonseca Brasil. « Nonlinear dynamics of an energy harvesting on board pendulum ». Dans XXXVIII Iberian-Latin American Congress on Computational Methods in Engineering. Florianopolis, Brazil : ABMEC Brazilian Association of Computational Methods in Engineering, 2017. http://dx.doi.org/10.20906/cps/cilamce2017-0077.

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Pereira, Tiago, Aline De Paula, Adriano Fabro et Marcelo Savi. « ENERGY HARVESTING IN A NONLINEAR SYSTEM UNDER HARMONIC AND RANDOM EXCITATIONS ». Dans 6th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering Methods in Structural Dynamics and Earthquake Engineering. Athens : Institute of Structural Analysis and Antiseismic Research School of Civil Engineering National Technical University of Athens (NTUA) Greece, 2017. http://dx.doi.org/10.7712/120117.5432.17603.

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Inamdar, Sumedh, Krystian Zimowski, Richard Crawford, Kristin Wood et Dan Jensen. « Nondestructive methods of integrating energy harvesting systems with structures ». Dans SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, sous la direction de Andrew L. Gyekenyesi. SPIE, 2012. http://dx.doi.org/10.1117/12.915423.

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Mateu, L., J. Knauer, P. Spies et H. Zessin. « D7.3 - Autonomous Tuning Methods for Piezoelectric Energy Harvesting Generators ». Dans AMA Conferences 2017. AMA Service GmbH, Von-Münchhausen-Str. 49, 31515 Wunstorf, Germany, 2017. http://dx.doi.org/10.5162/sensor2017/d7.3.

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Rapports d'organisations sur le sujet "Harvesting methods"

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Bjorkbom, John C., Russell S. Walters et Russell S. Walters. Allegheny hardwood regeneration response to even-age harvesting methods. Broomall, PA : U.S. Department of Agriculture, Forest Service, Northeastern Forest Experimental Station, 1986. http://dx.doi.org/10.2737/ne-rp-581.

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Bjorkbom, John C., Russell S. Walters et Russell S. Walters. Allegheny hardwood regeneration response to even-age harvesting methods. Broomall, PA : U.S. Department of Agriculture, Forest Service, Northeastern Forest Experimental Station, 1986. http://dx.doi.org/10.2737/ne-rp-581.

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Darr, Matthew J., Stuart J. Birrell, Ajay Shah, Keith E. Webster et Curtis Peder Thoreson. Analysis of Corn Stover Harvesting Equipment and Corn Stover Storage Methods. Ames : Iowa State University, Digital Repository, 2010. http://dx.doi.org/10.31274/farmprogressreports-180814-1850.

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Satija, Samridhi, Katharina Domnanich et Gregory Severin. Closeout Report : Development of Solid Isotope Harvesting Methods in Preparation for FRIB. Office of Scientific and Technical Information (OSTI), février 2022. http://dx.doi.org/10.2172/1845878.

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Burks, Thomas F., Victor Alchanatis et Warren Dixon. Enhancement of Sensing Technologies for Selective Tree Fruit Identification and Targeting in Robotic Harvesting Systems. United States Department of Agriculture, octobre 2009. http://dx.doi.org/10.32747/2009.7591739.bard.

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The proposed project aims to enhance tree fruit identification and targeting for robotic harvesting through the selection of appropriate sensor technology, sensor fusion, and visual servo-control approaches. These technologies will be applicable for apple, orange and grapefruit harvest, although specific sensor wavelengths may vary. The primary challenges are fruit occlusion, light variability, peel color variation with maturity, range to target, and computational requirements of image processing algorithms. There are four major development tasks in original three-year proposed study. First, spectral characteristics in the VIS/NIR (0.4-1.0 micron) will be used in conjunction with thermal data to provide accurate and robust detection of fruit in the tree canopy. Hyper-spectral image pairs will be combined to provide automatic stereo matching for accurate 3D position. Secondly, VIS/NIR/FIR (0.4-15.0 micron) spectral sensor technology will be evaluated for potential in-field on-the-tree grading of surface defect, maturity and size for selective fruit harvest. Thirdly, new adaptive Lyapunov-basedHBVS (homography-based visual servo) methods to compensate for camera uncertainty, distortion effects, and provide range to target from a single camera will be developed, simulated, and implemented on a camera testbed to prove concept. HBVS methods coupled with imagespace navigation will be implemented to provide robust target tracking. And finally, harvesting test will be conducted on the developed technologies using the University of Florida harvesting manipulator test bed. During the course of the project it was determined that the second objective was overly ambitious for the project period and effort was directed toward the other objectives. The results reflect the synergistic efforts of the three principals. The USA team has focused on citrus based approaches while the Israeli counterpart has focused on apples. The USA team has improved visual servo control through the use of a statistical-based range estimate and homography. The results have been promising as long as the target is visible. In addition, the USA team has developed improved fruit detection algorithms that are robust under light variation and can localize fruit centers for partially occluded fruit. Additionally, algorithms have been developed to fuse thermal and visible spectrum image prior to segmentation in order to evaluate the potential improvements in fruit detection. Lastly, the USA team has developed a multispectral detection approach which demonstrated fruit detection levels above 90% of non-occluded fruit. The Israel team has focused on image registration and statistical based fruit detection with post-segmentation fusion. The results of all programs have shown significant progress with increased levels of fruit detection over prior art.
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Venäläinen, Ari, Sanna Luhtala, Mikko Laapas, Otto Hyvärinen, Hilppa Gregow, Mikko Strahlendorff, Mikko Peltoniemi et al. Sää- ja ilmastotiedot sekä uudet palvelut auttavat metsäbiotaloutta sopeutumaan ilmastonmuutokseen. Finnish Meteorological Institute, janvier 2021. http://dx.doi.org/10.35614/isbn.9789523361317.

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Climate change will increase weather induced risks to forests, and thus effective adaptation measures are needed. In Säätyö project funded by the Ministry of Agriculture and Forestry, we have summarized the data that facilitate adaptation measures, developed weather and climate services that benefit forestry, and mapped what kind of new weather and climate services are needed in forestry. In addition, we have recorded key further development needs to promote adaptation. The Säätyö project developed a service product describing the harvesting conditions of trees based on the soil moisture assessment. The output includes an analysis of the current situation and a 10-day forecast. In the project we also tested the usefulness of long forecasts beyond three months. The weather forecasting service is sidelined and supplemented by another co-operation project between the Finnish Meteorological Institute and Metsäteho called HarvesterSeasons (https://harvesterseasons.com/). The HarvesterSeasons service utilizes long-term forecasts of up to 6 months to assess terrain bearing conditions. A test version of a wind damage risk tool was developed in cooperation with the Department of Forest Sciences of the University of Eastern Finland and the Finnish Meteorological Institute. It can be used to calculate the wind speeds required in a forest area for wind damage (falling trees). It is currently only suitable for researcher use. In the Säätyö project the possibility of locating the most severe wind damage areas immediately after a storm was also tested. The method is based on the spatial interpolation of wind observations. The method was used to analyze storms that caused forest damages in the summer and fall of 2020. The produced maps were considered illustrative and useful to those responsible for compiling the situational picture. The accumulation of snow on tree branches, can be modeled using weather data such as rainfall, temperature, air humidity, and wind speed. In the Säätyö project, the snow damage risk assessment model was further developed in such a way that, in addition to the accumulated snow load amount, the characteristics of the stand and the variations in terrain height were also taken into account. According to the verification performed, the importance of abiotic factors increased under extreme snow load conditions (winter 2017-2018). In ordinary winters, the importance of biotic factors was emphasized. According to the comparison, the actual snow damage could be explained well with the tested model. In the interviews and workshop, the uses of information products, their benefits, the conditions for their introduction and development opportunities were mapped. According to the results, diverse uses and benefits of information products and services were seen. Information products would make it possible to develop proactive forest management, which would reduce the economic costs caused by wind and snow damages. A more up-to-date understanding of harvesting conditions, enabled by information products, would enhance the implementation of harvesting and harvesting operations and the management of timber stocks, as well as reduce terrain, trunk and root damage. According to the study, the introduction of information is particularly affected by the availability of timeliness. Although the interviewees were not currently willing to pay for the information products developed in the project, the interviews highlighted several suggestions for the development of information products, which could make it possible to commercialize them.
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Arnett, Clint, Justin Lange, Ashley Boyd, Martin Page et Donald Cropek. Expression and secretion of active Moringa oleifera coagulant protein in Bacillus subtilis. Engineer Research and Development Center (U.S.), août 2021. http://dx.doi.org/10.21079/11681/41546.

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Cationic polypeptide proteins found in the seeds of the tropical plant Moringa oleifera have coagulation efficiencies similar to aluminum and ferric sulfates without their recalcitrant nature. Although these proteins possess great potential to augment or replace traditional coagulants in water treatment, harvesting active protein from seeds is laborious and not cost-effective. Here, we describe an alternative method to express and secrete active M. oleifera coagulant protein (MO) in Bacillus subtilis. A plasmid library containing the MO gene and 173 different types of secretory signal peptides was created and cloned into B. subtilis strain RIK1285. Fourteen of 440 clones screened were capable of secreting MO with yields ranging from 55 to 122 mg/L of growth medium. The coagulant activity of the highest MO secreting clone was evaluated when grown on Luria broth, and cell-free medium from the culture was shown to reduce turbidity in a buffered kaolin suspension by approximately 90% compared with controls without the MO gene. The clone was also capable of secreting active MO when grown on a defined synthetic wastewater supplemented with 0.5% tryptone. Cell-free medium from the strain harboring the MO gene demonstrated more than a 2-fold reduction in turbidity compared with controls. Additionally, no significant amount of MO was observed without the addition of the synthetic wastewater, suggesting that it served as a source of nutrients for the effective expression and translocation of MO into the medium.
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