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Academic literature on the topic 'Thinning regimes'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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Journal articles on the topic "Thinning regimes"

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David, Hassan Camil, Julio Eduardo Arce, Edilson Batista de Oliveira, Sylvio Péllico Netto, Rodrigo Otávio Veiga de Miranda, and Ângelo Augusto Ebling. "Economic analysis and revenue optimization in management regimes of Pinus taeda." Revista Ceres 64, no. 3 (2017): 222–31. http://dx.doi.org/10.1590/0034-737x201764030002.

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ABSTRACT The objective of this work was to select, using operational research techniques, management regimes of Pinus taeda L. that maximize the revenue generated by the wood, considering different attractiveness rates. The OpTimber-LP® software, which performs the simulations using SisPinus® software, was used for forest optimization. The regimes consisted of different combinations of forest sites, planting densities, thinning regimes and clearcutting ages, totaling 17,760 regimes per site. Wood production was quantified and evaluated by assortment classes. Planting, thinning and harvesting c

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Haight, Robert G. "Optimal management of loblolly pine plantations with stochastic price trends." Canadian Journal of Forest Research 23, no. 1 (1993): 41–48. http://dx.doi.org/10.1139/x93-007.

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An economic analysis of loblolly pine (Pinustaeda L.) plantation management options with stochastic sawtimber and pulpwood stumpage price trends is conducted using the North Carolina State University Plantation Management Simulator, a widely used model in the southeastern United States. Results for stands with a range of site indices suggest that regimes with high planting densities combined with commercial thinning options have higher expected present values than do regimes without thinning options, especially in plantations with hardwood competition. Such regimes are superior because high pl

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Rimal, Simant, Marc Djahangard, and Rasoul Yousefpour. "Forest Management under Climate Change: A Decision Analysis of Thinning Interventions for Water Services and Biomass in a Norway Spruce Stand in South Germany." Land 11, no. 3 (2022): 446. http://dx.doi.org/10.3390/land11030446.

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Climate change is producing threats to forests’ capacity of regulating water regimes. Therefore, thinning strategies can be applied to mitigate climate change impacts more efficiently by providing more spaces for trees to utilize resources e.g., water and nutrients. This study examined the effects of different thinning intensities and intervals on water characteristics and biomass growth of a 75-year-old Norway spruce (Picea abies) stand in the Black Forest, Germany. Here we used a water and management sensitive update of the process-based forest growth model 3PG, 3PG-Hydro. We applied light (

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Karlsson, Kjell, and Lennart Norell. "Modelling survival probability of individual trees in Norway spruce stands under different thinning regimes." Canadian Journal of Forest Research 35, no. 1 (2005): 113–21. http://dx.doi.org/10.1139/x04-161.

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The probability that an individual tree will remain in even-aged Norway spruce (Picea abies (L.) Karst.) stands subjected to different thinning programmes was modelled, using data from a thinning experiment established in 25 localities in southern Sweden. A logistic regression approach was used to predict the probability and the HosmerLemeshow goodness-of-fit test to evaluate the fit. Diameter at breast height (DBH), quadratic mean DBH, thinning intensity, thinning quotient, basal area, number of stems per hectare, stand age, number of thinnings, and site index were used as explanatory variab

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Anyango, Emma, Joyce A. Obuoyo, and Boniface O. Oindo. "Influence of Thinning Regime on Woody Species Density and Abundance in Kimondi Forest, Nandi County, Kenya." East African Journal of Forestry and Agroforestry 8, no. 1 (2025): 324–35. https://doi.org/10.37284/eajfa.8.1.3330.

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A silvicultural regime refers to the planned sequence of treatments applied to a forest stand, which mainly includes pruning and thinning regimes. The latter is a silvicultural practice that is important for the management of forest growth, composition, structure, and health. Despite the ecological and silvicultural importance of thinning, its limited application in plantation forests has constrained the effective management of woody species density and abundance. Thus, the aim of this research was to assess the influence of the thinning regime on woody species density and abundance. This stud

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Igor, Štefančík. "Crown development of beech crop trees under different thinning regimes." Journal of Forest Science 63, No. 4 (2017): 173–81. http://dx.doi.org/10.17221/117/2016-jfs.

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Crop trees are the main bearers of qualitative and value production of the stands. Although the number and production of the mentioned trees are affected by various factors, crown development by means of the thinning regime can be considered as very significant. The paper aims at the comparison of crop trees in homogeneous beech (Fagus sylvatica Linnaeus) stands, which were managed by three different management or thinning regimes for a long period (ca. 50 years): (i) heavy thinning from below (C grade according to the German forest research institutes released in 1902), (ii) Štefančík’s free

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Reisinger, Thomas W. "A Simulation-Based Approach to Evaluating Commercial Thinning Decisions in Loblolly Pine Plantations." Southern Journal of Applied Forestry 9, no. 4 (1985): 211–16. http://dx.doi.org/10.1093/sjaf/9.4.211.

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Abstract Computer simulation techniques are described which evaluate the impact of various stand conditions, management regimes, harvesting systems, and future market scenarios on current thinning decisions in pine plantations. Four simulation programs (PTAEDAR, PTAEDA, GENMAC, and HSS) were linked to predict tree growth/stand development and to model mechanized thinnings and final harvests. Simulation results were then combined with an investment analysis program to calculate the net present value of each strategy. An example analysis for a "typical" loblolly pine (Pinus taeda) plantation is

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Slodičák, M., and J. Novák. "Norway spruce thinning experiment Polom (Eastern Bohemia) after 22 years of observation." Journal of Forest Science 50, No. 1 (2012): 1–10. http://dx.doi.org/10.17221/4594-jfs.

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Effects of thinning were studied in an air-polluted young stand of Norway spruce on Polom series in the Orlick&eacute; hory Mts. (North-Eastern part of the Czech Republic) founded in 1980 in 15 years old spruce stand established by planting with density of 3,500&ndash;4,000 trees per hectare in 1965. The stand lies at an elevation of 800&nbsp;m in the 6<sup>th</sup> beech with spruce forest vegetation zone. The expected survival of the experimental stand at the beginning of experiments was 40 years (air pollution danger zone B). The thinning experiment is based on a cla

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Resquin, Fernando, Karen Baez, Sofia de Freitas, Diego Passarella, Ana Paula Coelho-Duarte, and Cecilia Rachid-Casnati. "Impact of Thinning on the Yield and Quality of Eucalyptus grandis Wood at Harvest Time in Uruguay." Forests 15, no. 5 (2024): 810. http://dx.doi.org/10.3390/f15050810.

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Understanding how thinning strategies impact wood quality and quantity for different purposes is of interest, given that plantation management is often based on parameters that require validation under varying growth conditions. Planted forests for solid purposes in the northern region of Urugay, western Argentina and South of Brazil are usually managed in initial stockings ranging from 800 to 1200 trees·ha−1 depending on the use of clones or seeds. Subsequent thinnings are applied (at plantation ages varying from 3 to 11 years) up to final stockings of around 200 trees·ha−1. This study evalua

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Franklin, Carlyle, Dennis W. Hazel, Randal R. Rucker, and Gary D. Kronrad. "Thinning and Harvesting Regimes for Yellow-Poplar." Southern Journal of Applied Forestry 14, no. 3 (1990): 101–3. http://dx.doi.org/10.1093/sjaf/14.3.101.

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Abstract Grade 1 yellow-poplar logs were recently selling for $150/mbf, three times the price for grade 2 logs in North Carolina. A computerized stand development model was used to examine the profitability of thinning and holding yellow-poplar stands for increased diameter and grade. Analyses were done over wide ranges in stand age, site quality, and stocking, at 5% and 10% discount rates. At a 5% discount rate, the maximum net present stumpage value was obtained by thinning in most regimes. Lower stand age, higher initial stocking, and higher site indices favored thin-clearcut regimes over r

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Dissertations / Theses on the topic "Thinning regimes"

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Karlsson, Kjell. "Growth allocation and stand structure in Norway spruce stands : expected taper and diameter distribution in stands subjected to different thinning regimes /." Uppsala : Dept. of Bioenergy, Swedish University of Agricultural Sciences, 2005. http://epsilon.slu.se/200575.pdf.

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McCament, Corinne Louise. "SURVIVAL AND GROWTH OF AMERICAN CHESTNUT (Castanea dentata (Marsh.) Borkh.) SEEDLINGS UNDER VARIOUS SILVICULTURAL REGIMES IN A MIXED OAK FOREST ECOSYSTEM." Ohio University / OhioLINK, 2004. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1088186523.

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Vieira, Bruno Hebling. "Brain functional connectivity in regions that exhibit age-related cortical thinning." Universidade de São Paulo, 2018. http://www.teses.usp.br/teses/disponiveis/59/59135/tde-17042018-130342/.

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The brain ages, and with it come alterations in its micro- and macro-structure which reflect in its morphology and functioning. Changes in the brain structure and functional coupling between regions can be assessed with neuroimaging, and, more specifically, magnetic resonance imaging (MRI). Using MRI data from two stages (Pilot and Enhanced) of the Nathan Kline Institute Rockland Sample (NKI-RS), totalling 613, free of neurodegenerative diseases, and right-handed, participants aged 18 to 85 years old, we measured gray-matter parameters such as cortical volume, cortical thickness, and cortical

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Marangon, Gabriel Paes. "OTIMIZAÇÃO BIOECONÔMICA DO REGIME DE MANEJO PARA Eucalyptus grandis W. Hill NO ESTADO DO RIO GRANDE DO SUL." Universidade Federal de Santa Maria, 2015. http://repositorio.ufsm.br/handle/1/3780.

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Conselho Nacional de Desenvolvimento Científico e Tecnológico<br>The goal of this study is to develop Density Management Diagrams for Eucalyptus grandis W. Hill, which will serve as auxiliary models to establish the variation of appropriate density, and the management group, to conduct settlements with the economic evaluation of management employees schemes. To study area were used stands in full density in reduced spacing, located in Rio-grandense Eastern center and Porto Alegre metropolitan in Rio Grande do Su states mesoregions. Of the density models tested, Tang showed good accuracy, with

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Souza, Franciny Lieny. "Densidade de estradas em povoamentos de Pinus taeda l. em regime de desbastes e corte raso." Universidade do Estado de Santa Catarina, 2016. http://tede.udesc.br/handle/handle/2337.

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Submitted by Claudia Rocha (claudia.rocha@udesc.br) on 2017-12-12T13:30:05Z No. of bitstreams: 1 PGEF16MA073.pdf: 1558252 bytes, checksum: 078f732c32622d0875732cff37fb28d7 (MD5)<br>Made available in DSpace on 2017-12-12T13:30:05Z (GMT). No. of bitstreams: 1 PGEF16MA073.pdf: 1558252 bytes, checksum: 078f732c32622d0875732cff37fb28d7 (MD5) Previous issue date: 2016-12-06<br>The objective of the present research was to analyze timber extraction operations and determining economically optimal density of forest roads in thinnings and clear cut for Pinus stands managed for multiple use, subsidizing

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Schneider, Paulo Sérgio Pigatto. "Estrutura bioeconômica da produção no manejo da densidade de Pinus taeda L. na região do planalto Catarinense, Brasil." Universidade Federal de Santa Maria, 2012. http://repositorio.ufsm.br/handle/1/3750.

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Conselho Nacional de Desenvolvimento Científico e Tecnológico<br>This work was developed with the aim of studying the efficiency of the models that express the relationship of density and diameter in evenaged stands of Pinus taeda L., managed in full density and highly stocked for a bioeconomic model of production. For this, were tested density and diameter models, using data derived from 50 permanent plots, measured annually until 18 age, allocated to settlements established in the spacing of 1.5x1.0 m, 2.5x 1.0 m, 1.5x2.0 m, 2.0x2.0 m, 1.5x3.0 m, 2.5x2.0 m, 2.0x3.0 m and 2.5x3.0 m, kept

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Horn, Hendrik. "Waldwachstumskundliche Untersuchungen zur Steigerung der Dendromasseproduktion im Spannungsfeld zwischen Plantage und Hochwald." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2018. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-233689.

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Durch das Ansteigen der Weltbevölkerung und das wirtschaftliche Aufstreben insbesondere der Entwicklungs- und Schwellenländer wird die Nachfrage nach dem Rohstoff Holz beträchtlich wachsen. Gleichzeitig ist die Entwicklung der weltweiten Waldfläche rückläufig. Eine wesentliche Frage für die nationalen Volkswirtschaften wird in der Zukunft sein, den bereits jetzt knapp werdenden Rohstoff Holz in ausreichendem Maße zur Verfügung zu stellen. Vor diesem Hintergrund beschäftigt sich die vorliegende Arbeit mit ertragskundlicher Analyse von Gehölzsystemen und den Möglichkeiten der Ertragssteigerung a

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Hughes, Kevin Lewis William. "Optimisation of methane production from anaerobically digested cow slurry using mixing regime and hydraulic retention time." Thesis, University of Exeter, 2015. http://hdl.handle.net/10871/18869.

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AD is regarded as a sustainable technology that could assist the UK Government meet internationally agreed GHG emission targets by 2050. However, the mature status of the technology is based on expensive systems that rely on high energy feedstock to be profitable. Meanwhile, the natural biodegradation of cow slurry is a recognised contributor to climate change despite having a relatively low CH4 potential because of the large volumes produced. Economic mixing is essential to the cost-effectiveness of farm AD but techniques applied are not always appropriate as slurry is a shear thinning thixot

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Yang, Sheng-I. "Estimation and Determination of Carrying Capacity in Loblolly Pine." Thesis, Virginia Tech, 2016. http://hdl.handle.net/10919/80442.

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Stand carrying capacity is the maximum size of population for a species under given environmental conditions. Site resources limit the maximum volume or biomass that can be sustained in forest stands. This study was aimed at estimating and determining the carrying capacity in loblolly pine. Maximum stand basal area (BA) that can be sustained over a long period of time can be regarded as a measure of carrying capacity. To quantify and project stand BA carrying capacity, one approach is to use the estimate from a fitted cumulative BA-age equation; another approach is to obtain BA estimates impli

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Lin, Ying-Hsiu, and 林盈秀. "Effects of Thinning Regimes on Stand Structure Complexity." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/62556003587268192054.

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碩士<br>國立臺灣大學<br>森林環境暨資源學研究所<br>96<br>Nowadays, an important objective in managing plantation forests is the maintenance of biodiversity. As it is believed that a structurally more complex stand will harbor more diverse habitats, which in turn will promote species diversity, creating structural complexity is central to the management of plantation forests, and thinning is considered as one of the best methods to achieve that objective. Using a 10-ha sugi (Cryptomeria japonica) plantation located in central Taiwan as an example, this study intended to answer which thinning regime would create th

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Books on the topic "Thinning regimes"

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Harry, Eriksson, ed. Effects of different thinning and fertilization regimes on the development of Scots pine (Pinus sylvestris (L.) and Norway spruce (Picea abies (L.) Karst.) stands in long-term silvicultural trials in Sweden. Swedish University of Agricultural Sciences, Inst. of Forest Yield Research, 1997.

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Yoshimoto, Atsushi. An efficient optimizing model for determining thinning regime and rotation age using the stand projection system growth simulator. 1987.

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Furst, Eric M., and Todd M. Squires. Magnetic bead microrheology. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780199655205.003.0008.

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Magnetism is a convenient force for actively pulling colloidal particles in a material. Many materials of interest in a microrheology experiment have a negligible magnetic susceptibility, and so embedded magnetic particles can be subject to relatively strong forces by fields imposed from outside of the sample. These are usually generated by electromagnets, but can also include the use of permanent magnets, or a combination of both. Such “magnetic tweezers” are used as sensitive force probes, capable of generating forces ranging from femtonewtons to nanonewtons. Magnetic forces and magnetic mat

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Furst, Eric M., and Todd M. Squires. Laser tweezer microrheology. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780199655205.003.0009.

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To many, the idea that light can be used to hold and manipulate matter is probably quite foreign. The photon is a seemingly evanescent particle; its interactions with matter are weak. But while it has no rest mass, a photon carries momentum. Optical traps have become important tools used to measure forces on nanometer to micrometer length scale. Laser tweezers can be used to drive (or hold) microrheological probes. Optical trapping forces are reviewed and optical trap designs discussed, incluing the use of fixed and moving reference frame optical traps. Proper calibration of optical traps espe

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Book chapters on the topic "Thinning regimes"

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D’Amato, Anthony W., Brian J. Palik, Patricia Raymond, Klaus J. Puettmann, and Miguel Montoro Girona. "Building a Framework for Adaptive Silviculture Under Global Change." In Advances in Global Change Research. Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-15988-6_13.

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AbstractUncertainty surrounding global change impacts on future forest conditions has motivated the development of silviculture strategies and frameworks focused on enhancing potential adaptation to changing climate and disturbance regimes. This includes applying current silvicultural practices, such as thinning and mixed-species and multicohort systems, and novel experimental approaches, including the deployment of future-adapted species and genotypes, to make forests more resilient to future changes. In this chapter, we summarize the general paradigms and approaches associated with adaptatio

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Yamazaki, Y., A. Holz, S. F. Edwards, and H. Fujishiro. "Theory of Shear Thinning in Liquid Crystal Polymers, for the Lower Shear Rate Regime." In Springer Proceedings in Physics. Springer Berlin Heidelberg, 1990. http://dx.doi.org/10.1007/978-3-642-76008-2_15.

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Savill, Peter, Julian Evans, Daniel Auclair, and Jan Falck. "Spacing, thinning, pruning, and rotation length." In Plantation Silviculture in Europe. Oxford University PressOxford, 1997. http://dx.doi.org/10.1093/oso/9780198549093.003.0010.

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Abstract The spacing between trees or stocking at which a crop grows affects the degree of competition in the stand. This influences mortality, total production per unit area, the size to which individual trees will grow, several aspects of wood quality, and sometimes susceptibility to pests and diseases. The value of timber and costs of management practices are both affected by spacing. A clear understanding of the effects of possible spacing and thinning regimes on production is one of the most important aspects of silviculture since they influence the end use of the timber and its profitabi

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Young, Oran R. "Determinants of Effective Problem-Solving." In Governing Complex Systems. The MIT Press, 2017. http://dx.doi.org/10.7551/mitpress/9780262035934.003.0003.

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Adopting a problem-solving perspective on governance leads to a focus on the determinants of success or failure in efforts to solve specific problems like the thinning of the stratospheric ozone layer or the onset of climate change. In this regard, it is helpful to begin by distinguishing among outputs, outcomes, and impacts. Outputs are the administrative apparatus and compliance mechanisms created to move governance systems from paper to practice. Outcomes are the behavioral changes brought about by the operation of governance systems. Impacts are the effects of such systems on the alleviati

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Koester, Alexandria J., Jeremy D. Shakun, Paul R. Bierman, et al. "Laurentide ice sheet thinning and erosive regimes at Mount Washington, New Hampshire, inferred from multiple cosmogenic nuclides." In Untangling the Quaternary Period—A Legacy of Stephen C. Porter. Geological Society of America, 2020. http://dx.doi.org/10.1130/2020.2548(15).

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Greene, Deanna J., Soyoung Kim, Kevin J. Black, and Bradley L. Schlaggar. "Neurobiology and Functional Anatomy of Tic Disorders." In Tourette Syndrome, 2nd ed., edited by Liana Fasching, Melanie Brady, and Flora M. Vaccarino. Oxford University Press, 2022. http://dx.doi.org/10.1093/med/9780197543214.003.0014.

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Abstract This chapter summarizes the highly valuable contribution of magnetic resonance imaging (MRI) to the understanding of the functional anatomy of tics and related disorders. Structural MRI studies have revealed altered striatal volumes in children and adults with Tourette syndrome (TS), although results are inconsistent. Cortical thinning in sensorimotor regions has been detected in children and adults with TS, with correspondence between cortical region and types of tics. Whereas adults with TS show cortical thinning and reduced gray matter volume in prefrontal regions, suggesting a fai

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DIMAURO, G., S. IMPEDOVO, and G. PIRLO. "A NEW THINNING ALGORITHM BASED ON CONTROLLED DELETION OF EDGE REGIONS." In Series in Machine Perception and Artificial Intelligence. WORLD SCIENTIFIC, 1994. http://dx.doi.org/10.1142/9789812797858_0002.

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Redlich, A. C., D. Bartel, H. Schorr, and L. Deters. "A Deterministic EHL Model for Point Contacts in Mixed Lubrication Regime." In Thinning Films and Tribological Interfaces, Proceedings of the 26th Leeds-Lyon Symposium on Tribology. Elsevier, 2000. http://dx.doi.org/10.1016/s0167-8922(00)80114-5.

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Slodičák, M. "Thinning regime in stands of Norway spruce subjected to snow and wind damage." In Wind and Trees. Cambridge University Press, 1995. http://dx.doi.org/10.1017/cbo9780511600425.025.

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Konstantinou, Alexandros. "The “death” of the Sevier-Laramide orogen: Gravitational collapse of the crust or something else?" In Tectonic Evolution of the Sevier-Laramide Hinterland, Thrust Belt, and Foreland, and Postorogenic Slab Rollback (180–20 Ma). Geological Society of America, 2022. http://dx.doi.org/10.1130/2021.2555(15).

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ABSTRACT The Basin and Range Province is considered to be one of the most iconic continental rift provinces that postdates a prolonged orogeny. Here, I present evidence that challenges all the assumptions that lead to the long-held notion that gravitational collapse of thickened (55–65-km-thick) continental crust was a major driver of Basin and Range extension. This study focused on integrating the regional tectonic and magmatic history of the northeastern region of the Basin and Range (centered on the Albion–Raft River–Grouse Creek metamorphic core complex) and combines insights from a compil

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Conference papers on the topic "Thinning regimes"

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Suryani, Suryani, Rudi Rinaldi, and Winner Tarigan. "Dealing with Unexpected "Synergy" from Bacteria & Sand in Condensate Pipeline." In CONFERENCE 2025. AMPP, 2025. https://doi.org/10.5006/c2025-00239.

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MIC (Microbiologically Influenced Corrosion) is a well-known source of corrosion which could lead to failure in oil and gas facilities. Common mitigation to control the corrosion due to bacteria shares many success stories, however, a 51 km of 14” condensate line was found severely suffering from MIC, despite the implementation of the mitigation in place. A thorough review of the operating condition, fluid sources, pipeline profile, flow regime and applied mitigation - including sand production trending - was done with the main findings indicating that a combination of the above situation trig

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Standlee, Sarah, K. Daniel Efird, and Derek Spiller. "Under Deposit Corrosion from Iron Sulfide." In CORROSION 2011. NACE International, 2011. https://doi.org/10.5006/c2011-11266.

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Abstract Deposits can play an important role in the corrosion rate and morphology of carbon steel in a production environment as well as affect the efficacy of an inhibitor. A test method has been developed to investigate the corrosion characteristics of carbon steel in a stratified flow regime where deposits of solids accumulate in the bottom of a pipeline. This test method is used to investigate the difference in under deposit corrosion of API X-65 carbon steel when the deposit consists of either sand or iron sulfide (FeS) with and without the presence of mill scale on the steel. In the case

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Niemeläinen, Pasi, Martti Pulliainen, Jarmo Kahala, and Sampo Luukkainen. "Corrosion Monitoring and Root Cause Identification in High Solids Concentrators." In CORROSION 2014. NACE International, 2014. https://doi.org/10.5006/c2014-4395.

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Abstract Black liquor high solids (about 80%) concentrators have often been found to suffer from aggressive corrosion. Especially the 1st and 2nd effect bodies are susceptible to corrosion attacks resulting in tube leaks and wall thinning, limiting the availability and lifetime of evaporator lines. Corrosion dynamics and utilized construction materials have been studied extensively within the pulp and paper industry in order to understand the corrosion process. However, it has been challenging to identify root causes for corrosion, which has limited pro-active measures in minimizing corrosion

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Rose, J. L., D. Jiao, S. P. Pelts, J. N. Barshinger, and M. J. Quarry. "Hidden Corrosion Detection with Guided Waves." In CORROSION 1997. NACE International, 1997. https://doi.org/10.5006/c1997-97292.

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Abstract A corrosion detection feasibility study with ultrasonic guided waves is presented. Rather than use normal beam ultrasonic techniques that move point by point over the structure being examined, guided waves are more global in nature allowing examination of regions over 2-3 cm on up to 4-5m with reasonable efficiency in corrosion detection and in estimating average wall thickness between the two transducers. A sample problem in aging aircraft inspection for fuselage thinning is studied and used to illustrate the guided wave inspection procedure and potential for classification and sizin

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Metwally, Hossam M., and Raj M. Manglik. "A Computational Study of Enhanced Heat Transfer in Laminar Flows of Non-Newtonian Fluids in Corrugated-Plate Channels." In ASME 2000 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2000. http://dx.doi.org/10.1115/imece2000-1277.

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Abstract The enhanced heat transfer behavior of laminar shear-thinning, power-law fluid flows in sinusoidal corrugated-plate channels is investigated. With duct plates at uniform wall temperature, periodically developed flows are considered for a wide range of channel corrugation aspect ratio (0 ≤ γ ≤ 1), flow rates (10 ≤ Reg ≤ 1500), and pseudo-plastic flow behavior indices (n = 0.5, 0.8, and 1.0). Typical velocity and temperature distributions, along with extended results for isothermal friction factor f and Collburn factor j are presented. The enhanced forced convection is found to be stron

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Ben Rajeb, Faraj, Syed Imtiaz, Yan Zhang, Amer Aborig, Mohamed M. Awad, and Mohammad Azizur Rahman. "Void Fraction, Pressure Drop, and Flow Pattern Behavior for Two-Phase Non-Newtonian Slug Flow." In ASME 2021 40th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/omae2021-62513.

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Abstract Slug flow is one of the most common flow patterns in non-Newtonian two-phase flow in pipes. It is a very common occurrence in gas-liquid two-phase flow in the pipe. Usually, it is an unfavorable flow pattern due to its unsteady nature, intermittency as well as high pressure drop. The differences between slug flow and elongated bubble flow are not clear because usually these two types of flow combined under one flow category. In general, these two-phase flow regimes are commonly defined as intermittent flow. In the present study, pressure gradient, and wave behavior in slug flow have b

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Kumar, Purushotam, Kai Jin, and Surya Pratap Vanka. "Numerical Simulation of a Gas Bubble Rising in Power-Law Fluids Using a Sharp Surface Force Implementation." In ASME-JSME-KSME 2019 8th Joint Fluids Engineering Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/ajkfluids2019-4769.

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Abstract In this paper, we have applied a recently-developed numerical technique to study the three-dimensional dynamics of a confined air bubble rising in shear thinning and shear-thickening power-law fluids. The method is a blend of Volume of Fluid and Level Set methods and incorporates a Sharp Surface Force Method (SSF) for surface tension forces by solving a second Pressure Poisson Equation (PPE). The gas-liquid interface is captured by an equation for the liquid volume fraction and advected using the geometry reconstruction method. The interface normal and curvature are computed using lev

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Stefanitsis, Dionisis, Ilias Malgarinos, George Strotos, Nikolaos Nikolopoulos, Emmanouil Kakaras, and Manolis Gavaises. "Numerical investigation of the aerodynamic breakup of diesel droplets under various gas pressures." In ILASS2017 - 28th European Conference on Liquid Atomization and Spray Systems. Universitat Politècnica València, 2017. http://dx.doi.org/10.4995/ilass2017.2017.4690.

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The present study investigates numerically the aerodynamic breakup of Diesel droplets for a wide range of ambient pressures encountered in engineering applications relevant to oil burners and internal combustion engines. The numerical model solves the Navier-Stokes equations coupled with the Volume of Fluid (VOF) methodology utilized for capturing the interface between the liquid and the surrounding gas. An adaptive local grid refinement technique is used to increase the accuracy of the numerical results around the interface. The Weber (We) numbers examined are in the range of 14 to 279 which

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Hammad, Khaled J., M. Volkan Otugen, George C. Vradis, and Engin B. Arik. "Laminar Axisymmetric Recirculating Flow of a Nonlinear Viscoplastic Fluid." In ASME 1996 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 1996. http://dx.doi.org/10.1115/imece1996-0224.

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Abstract The laminar flow of a nonlinear viscoplastic fluid through an annular sudden expansion was investigated experimentally. In addition to a yield-stress shear-thinning fluid, the flow of a Newtonian fluid through the same expansion was also studied to form a baseline for comparison. Velocity vectors were measured on the vertical center plane using digital particle image velocimetry (PIV). From these measurements, two-dimensional contours of axial and radial velocity as well as the stream function were calculated covering the separated, reattached and redeveloping flow regions. The Reynol

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Bertocchi, Luca, Matteo Giacopini, and Daniele Dini. "Analysis of the Lubrication Regimes at the Small End and Big End of a Connecting Rod of a High Performance Motorbike Engine." In ASME/STLE 2012 International Joint Tribology Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/ijtc2012-61087.

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In the present paper, the algorithm proposed by Giacopini et. al. [1], based on a mass-conserving formulation of the Reynolds equation using the concept of complementarity is suitably extended to include the effects of compressibility, piezoviscosity and shear-thinning on the lubricant properties. This improved algorithm is employed to analyse the performance of the lubricated small end and big end bearings of a connecting rod of a high performance motorbike engine. The application of the algorithm proposed to both the small end and the big end of a con-rod is challenging because of the differ

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