Literatura académica sobre el tema "Height growth strategy"
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Artículos de revistas sobre el tema "Height growth strategy"
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Arney, James D. "A modeling strategy for the growth projection of managed stands". Canadian Journal of Forest Research 15, n.º 3 (1 de junio de 1985): 511–18. http://dx.doi.org/10.1139/x85-084.
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Using a large data base of permanent research plots in coastal Douglas-fir, a growth projection strategy is developed. The emphasis is on stratifying growth influences into potential and modifier functions for components of diameter and height growth within a stand table. Growth periods are defined as equal increments of top height through time. The model developed is an individual-tree, distance-independent, stand-projection model.
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Robinson, Andrew P. y William R. Wykoff. "Imputing missing height measures using a mixed-effects modeling strategy". Canadian Journal of Forest Research 34, n.º 12 (1 de diciembre de 2004): 2492–500. http://dx.doi.org/10.1139/x04-137.
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This paper proposes a method whereby heightdiameter regression from an inventory can be incorporated into a height imputation algorithm. Point-level subsampling is often employed in forest inventory for efficiency. Some trees will be measured for diameter and species, while others will be measured for height and 10-year increment. Predictions of these missing measures would be useful for estimating volume and growth, respectively, so they are often imputed. We present and compare three imputation strategies: using a published model, using a localized version of a published model, and using best linear unbiased predictions from a mixed-effects model. The bases of our comparison are four-fold: minimum fitted root mean squared error and minimum predicted root mean squared error under a 2000-fold cross-validation for tree-level height and volume imputations. In each case the mixed-effects model proved superior. This result implies that substantial environmental variation existed in the heightdiameter relationship for our data and that its representation in the model by means of random effects was profitable.
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Deng, Yun, Xiaobao Deng, Jinlong Dong, Wenfu Zhang, Tao Hu, Akihiro Nakamura, Xiaoyang Song, Peili Fu y Min Cao. "Detecting Growth Phase Shifts Based on Leaf Trait Variation of a Canopy Dipterocarp Tree Species (Parashorea chinensis)". Forests 11, n.º 11 (29 de octubre de 2020): 1145. http://dx.doi.org/10.3390/f11111145.
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Canopy species need to shift their adaptive strategy to acclimate to very different light environments as they grow from seedlings in the understory to adult trees in the canopy. However, research on how to quantitively detect ecological strategy shifts in plant ontogeny is scarce. In this study, we hypothesize that changes in light and tree height levels induce transitions in ecological strategies, and growth phases representing different adaptive strategies can be classified by leaf trait variation. We examined variations in leaf morphological and physiological traits across a vertical ambient light (represented by the transmittance of diffuse light, %TRANS) and tree height gradient in Parashorea chinensis, a large canopy tree species in tropical seasonal rainforest in Southwestern China. Multivariate regression trees (MRTs) were used to detect the split points in light and height gradients and classify ontogenetic phases. Linear piecewise regression and quadratic regression were used to detect the transition point in leaf trait responses to environmental variation and explain the shifts in growth phases and adaptive strategies. Five growth phases of P. chinensis were identified based on MRT results: (i) the vulnerable phase, with tree height at less than 8.3 m; (ii) the suppressed phase, with tree height between 8.3 and 14.9 m; (iii) the growth release phase, with tree height between 14.9 and 24.3 m; (iv) the canopy phase, with tree height between 24.3 and 60.9 m; and (v) the emergent phase, with tree height above 60.9 m. The suppressed phase and canopy phase represent “stress-tolerant” and “competitive” strategies, respectively. Light conditions drive the shift from the “stress-tolerant” to the “competitive” strategy. These findings help us to better understand the regeneration mechanisms of canopy species in forests.
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Carvalho, Marcia Eugenia Amaral, Paulo Roberto de Camargo e. Castro, Marcos Vinicius de Castro Ferraz Junior y Ana Carolina Cabrera Machado Mendes. "Are plant growth retardants a strategy to decrease lodging and increase yield of sunflower?" Comunicata Scientiae 7, n.º 1 (10 de mayo de 2016): 154. http://dx.doi.org/10.14295/cs.v7i1.1286.
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One of the major disadvantages of sunflower cultivation is the increased plant height, making it prone to the lodging. The use of plant growth retardants can be an alternative strategy to reduce plant height; however, these compounds may affect productivity. The aim of this study was to evaluate the effects of plant growth retardants on sunflower development and yield. Four treatments were studied: 1- control; 2- gibberellic acid (GA) 10 mg L−1; 3- trinexapac-ethyl (TE) 5 mL L−1, and 4- maleic hidrazide (MH) 8 mL L−1. TE and MH decreased plant height (16.9 and 35.9%, respectively); however, only TE positively influenced capitulim diameter and dry mass (46.7 and 311%, when compared to control) at 60 days after planting (DAP). At 81 DAP, dry mass of capitulum did not differ among control and TE-treated plants. On the other hand, MH impaired diameter and dry mass of capitulum (92.9 and 74.7%, respectively). It can be concluded that the application of TE is a potential strategy to decrease lodging probability without affecting sunflower yield. Furthermore, although MH negatively affected sunflower development, its use on the crop cannot be excluded since other doses, frequencies and moment of application can be studied.
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Windyarini, Eritrina y Tri Maria Hasnah. "Identification and Seedlings Growth Evaluation of Shorea Species-Producing Tengkawang". Jurnal Wasian 2, n.º 1 (15 de marzo de 2015): 33. http://dx.doi.org/10.20886/jwas.v2i1.868.
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Most of non timber forest product (NTFP) utilization taken from natural forests which decrease on productivity annually, including tengkawang producer species which taken from West Kalimantan natural forests. This condition needs an effort to preserve those species from natural population utilization through plantation forest development that require spesific strategy. This study was part of breeding strategy of shorea species producing tengkawang which aimed to species identify and seedling growth evaluation used genetic material from 2 (two) population from West Kalimantan. The research was arranged in 2 (two) steps, i.e.1) species identification used morphology characteristic difference, and 2) seedling growth evaluation (height,diameter,sturdiness). Seedling growth evaluation was arranged in RCBD, with 5 plot (combination of species and source population), contained 25 seedlings and 4 replications (blocks). The result showed that seedlings of shorea species producing tengkawang, i.e. S.stenoptera, S.macrophylla, and S.gysbertsiana can be different from its stipulae morphology characteristic. Growth of 10 months shorea species producing tengkawang seedlings were significantly different on height and sturdiness. Seedlings height were 67,19 – 88,79 cm, seedlings diameter 9,65 – 10,33 mm and sturdiness 7 – 9,21 in range. The best seedling growth was S.stenoptera and S.macrophylla from Gunung Bunga, West Kalimantan.
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da Silva, Gilson Fernandes, Salvador Alejandro Gezan, Carlos Pedro Boechat Soares y Luciano Zumerle Zaneti. "Modeling Growth and Yield ofSchizolobium amazonicumunder Different Spacings". International Journal of Forestry Research 2013 (2013): 1–10. http://dx.doi.org/10.1155/2013/675137.
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This study aimed to present an approach to model the growth and yield of the speciesSchizolobium amazonicum(Paricá) based on a study of different spacings located in Pará, Brazil. Whole-stand models were employed, and two modeling strategies (Strategies A and B) were tested. Moreover, the following three scenarios were evaluated to assess the accuracy of the model in estimating total and commercial volumes at five years of age: complete absence of data (S1); available information about the variables basal area, site index, dominant height, and number of trees at two years of age (S2); and this information available at five years of age (S3). The results indicated that the 3 × 2 spacing has a higher mortality rate than normal, and, in general, greater spacing corresponds to larger diameter and average height and smaller basal area and volume per hectare. In estimating the total and commercial volumes for the three scenarios tested, Strategy B seems to be the most appropriate method to estimate the growth and yield of Paricá plantations in the study region, particularly because Strategy A showed a significant bias in its estimates.
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Strefeler, Mark S. "Growth Response of 20 Seed Geranium Cultivars to Three Day–Night Temperature Regimes". HortScience 30, n.º 7 (diciembre de 1995): 1465–66. http://dx.doi.org/10.21273/hortsci.30.7.1465.
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The influence of temperature and genotype on plant height, internode length, and morphological development of 20 cultivars of Pelargonium ×hortorum Bailey were determined by growing plants under one of three day–night temperature regimes (18/18C, 18/24C, and 24/18C). Temperature regime influenced internode length and plant height regardless of plant genotype. Internode length and plant height increased as the day–night temperature differential (DIF) increased from –6 to 6C. Average internode length increased from 5.3 ± 0.2 mm for –6C DIF to 6.3 ± 0.2 mm for +6C DIF. Genotypes differed for average internode length (4.2 to 8.7 mm) and plant height (54 to 95 mm). Node count increased as average daily temperature (ADT) increased. Node counts were 11.2 at 18/18C (ADT = 18), 11.9 at 24/18C (ADT = 20.3), and 12.1 at 18/24C (ADT = 21.8). Genotype × temperature interactions were not significant for the recorded traits. This study demonstrates that DIF is an effective height control strategy, regardless of geranium genotype, and that DIF combined with the selection of genetically short cultivars may eliminate the need for chemical height control in the commercial production of geraniums.
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Zaitsev, Gleb, Alexander Davydychev, Alexey Kulagin, Rafak Giniyatullin, Ruslan Suleymanov, Andrey Kulagin, Natalya Egorova, Mikhail Komissarov, Ruslan Urazgildin y Olesya Tagirova. "Suppressed Undergrowth of Siberian Spruce (Picea obovata Ledeb.) in Early Ontogeny: One-Way Ticket or Survival Strategy?" Forests 12, n.º 7 (28 de junio de 2021): 851. http://dx.doi.org/10.3390/f12070851.
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The study examined the growth characteristics of the Siberian spruce (Picea obovata Ledeb.) under the canopy of coniferous forests in early ontogeny. We revealed that spruce undergrowth in adverse conditions is suppressed, is slow to grow and has xylorhizomes. The result is a significant difference in height, age and stage of ontogeny that affects the forest’s growth dynamics. The formation of xylorhizomes changes the relative dimensions of the above-ground part and the plant’s absolute height from 42 to 75%, depending on age. We identified two periods of growth intensity (slow and stable) and the critical age for spruce undergrowth to move from one stage of ontogeny to the next. If it does not make the transition, it will die. There are two strategies for developing spruce undergrowth: a “direct” path during rapid growth and a “waiting” path when the plants are suppressed. Such growth pathways in the pre-generative stage of the Siberian spruce’s ontogeny allow the undergrowth, even in a suppressed state, to survive in an adverse environment under the forest canopy.
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Mendley, Susan R., Fotios Spyropoulos y Debra R. Counts. "Short Stature in Chronic Kidney Disease Treated with Growth Hormone and an Aromatase Inhibitor". Case Reports in Pediatrics 2015 (2015): 1–4. http://dx.doi.org/10.1155/2015/738571.
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We describe an alternative strategy for management of severe growth failure in a 14-year-old child who presented with advanced chronic kidney disease close to puberty. The patient was initially treated with growth hormone for a year until kidney transplantation, followed immediately by a year-long course of an aromatase inhibitor, anastrozole, to prevent epiphyseal fusion and prolong the period of linear growth. Outcome was excellent, with successful transplant and anticipated complete correction of height deficit. This strategy may be appropriate for children with chronic kidney disease and short stature who are in puberty.
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Weber, John C., Carmen Sotelo Montes, Julio Ugarte y Tony Simons. "Phenotypic Selection of Calycophyllum spruceanum on Farms in the Peruvian Amazon: Evaluating a Low-Intensity Selection Strategy". Silvae Genetica 58, n.º 1-6 (1 de diciembre de 2009): 172–79. http://dx.doi.org/10.1515/sg-2009-0023.
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AbstractA low-intensity selection strategy was recommended for timber trees in the Peruvian Amazon to maintain genetic variation on farms and produce modest gains in tree growth. The effectiveness of this strategy was evaluated using Calycophyllum spruceanum. Farmers selected 66 mother trees of different ages on farms in seven locations (~20% of all trees in the locations) in one watershed, based on a visual assessment of growth, form and external disease symptoms. Another 66 mother trees were chosen at random. Tree height, stem diameter, stem bifurcations and mortality of progeny of the selected and random groups of mother trees were evaluated at 15, 26 and 38 months in a provenance/progeny test located on farms in the same watershed. Height was significantly greater (10%) in the selected group at 15 months, but it did not differ significantly between the selected and random groups at 26 and 38 months. There were no significant differences in diameter, bifurcations and mortality between the groups. There was significant variation in height and diameter at all measurement ages due to families, and results suggested that variation in bifurcations and mortality due to families was also significant. Based on approximate 95% confidenceintervals, family variances in height and diameter did not differ significantly between the selected and random groups at any measurement age, but evaluations should continue to confirm these tentative conclusions. Some practical implications for tree improvement programs are discussed.
Tesis sobre el tema "Height growth strategy"
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Guillon, Thomas. "Modélisation mathématique, simulation numérique et contrôle optimal des rétroactions entre biomécanique et croissance de l'arbre". Thesis, Montpellier 2, 2011. http://www.theses.fr/2011MON20142/document.
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La hauteur des arbres est un trait écologique majeur représentant l'intensité de la compétition pour la lumière. De plus, la croissance des arbres est le résultat de multiples compromis afin de maintenir leur orientation verticale et leur stabilité mécanique tout en assurant les autres fonctions écophysiologiques. Le contrôle de l'orientation de la croissance est réalisé par deux mécanismes: la croissance différentielle au niveau du méristème apical et la formation de bois de réaction au cours de la croissance secondaire. Cependant, la modélisation simultanée de la croissance et des rétroactions biomécaniques dépasse le cadre classique de la mécanique des structures. En effet, le concept de configuration de référence devient imprécis dû à l'apparition de nouveaux points matériels libres de contraintes sur une surface déformée au cours de la croissance. Dans cette thèse, un nouveau formalisme mathématique est proposé à partir de la théorie des poutres et modélise simultanément les effets de la croissance et de la biomécanique de l'arbre. Afin de résoudre le système d'équations aux dérivées partielles, de nouvelles méthodes numériques sont développées et tiennent compte de la dépendance entre l'espace et le temps. Enfin, deux problèmes de contrôle optimal sont analysés, modélisant les stratégies d'allocation dynamique de la biomasse pour la croissance primaire et secondaire, en fonction de différents contextes écologiques. Ce travail offre de nouvelles perspectives sur les mathématiques de la mécanique de la croissance et ses applications en biologieHeight is a major ecological trait for growing trees, representing the intensity for light competition. Moreover, tree height results from a trade-off between different functions, including tree mechanical stability. Trees develop growth strategies to maintain their vertical orientation and mechanical stability, in addition to other ecophysiological functions, through differential primary growth near the shoot apical meristem and formation of reaction wood during secondary growth. However, this coupling is a problematic issue since the progressive addition of new material on an existing deformed body makes the definition of a reference configuration unclear. This thesis presents a new mathematical framework for rod theory modelling simultaneously the interactions between the growth process and tree biomechanics. In order to solve the obtained system of partial differential equations, new numerical methods are developed and take into account the dependence between space and time, which is a specific feature of surface growth problems. Finally, the present work addresses the mathematical formulation of two optimal control problems characterising tree's growth strategies. Growth strategies are analysed with respect to the ecological context, through two variables, which are the ratio of biomass allocated to primary growth and the distribution of biomass allocated to secondary growth along the growing stem. This work gives new insights to the mathematical framework of surface growth mechanics and its applications in biology
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Landry, Drew R. "Developing a vision based ministry strategy for Trinity Heights Baptist Church Shreveport, Louisiana". Theological Research Exchange Network (TREN), 1997. http://www.tren.com.
Texto completoLibros sobre el tema "Height growth strategy"
Capítulos de libros sobre el tema "Height growth strategy"
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Kim, Hayin. "Managing the Growth of Community Schools". En Community Schools in Action. Oxford University Press, 2005. http://dx.doi.org/10.1093/oso/9780195169591.003.0023.
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Essential to a community school’s success is a committed partnership among the school and school district, community organizations, and parents—a partnership that makes students’ academic success a shared responsibility and a shared goal. These partners come together to provide three key sets of supports and opportunities: (1) a strong, coherent core instructional program during the regular school day; (2) supports and services that address and seek to remove barriers to learning; and (3) enrichment opportunities during nonschool hours that build students’ motivation and capacity to succeed in school. Table 11.1 illustrates this concept through a graphic representation of supports and opportunities offered by New York community schools. After the early success of the work at Intermediate School (IS) 218 and Primary School (PS) 5 in Washington Heights, The Children’s Aid Society (CAS) received scores of requests from principals around New York City who wanted their schools to become CAS community schools. Deciding how to respond to these requests became a major issue for CAS, because our intention from the beginning was to enter into a long-term partnership with each school—which meant that the agency was committing itself to sustaining each partnership for multiple years, if not forever. The financial implications of each decision were clear: we needed to build slowly and carefully, with a view toward long-term sustainability. In our strategic plans and discussions with CAS trustees and funders, managing the growth of community schools was an explicit goal. Furthermore, we recognized that implementation of the CAS community school model must focus on adaptation, not replication. This meant that, as we added schools (at the rate of roughly one per year), we would conduct a local needs and resource assessment and make a plan that was responsive to the unique assets and needs of each school and its surrounding community. From March 1992 through June 2003, CAS worked in close partnership with the New York City public schools to develop ten community schools—five in the Washington Heights neighborhood of northern Manhattan, two in East Harlem (also in Manhattan), and three in the South Bronx.
Actas de conferencias sobre el tema "Height growth strategy"
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Mombourquette, Cole, Dave Erickson, Tim Geldreich, Mark Ross, Eric Hudson y Dan Cammaert. "Breaking Through the Boundary: Are HVFR and Landing Target The Solution? A Charlie Lake Exploitation Strategy". En SPE Annual Technical Conference and Exhibition. SPE, 2021. http://dx.doi.org/10.2118/206094-ms.
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Abstract The objective of this exploitation strategy was to evaluate fracture-driven interactions (FDI) between intervals within the Braeburn members of the Lower Charlie Lake formation. With the primary goal to determine if a single well can be drilled in the Middle Braeburn and effectively drain reserves from two previously distinct producing intervals. The target intervals in this study were separated by a boundary layer composed of interbedded anhydrite, siltstone, and dolomite layers. Wells were completed in sequence using cemented ball-drop fracturing, and high-viscosity friction reducer (HVFR) fluid systems. Diagnostics including pressure monitoring, fracture modelling, and tracers were employed to evaluate stimulation response between wells. Realtime downhole pressure monitors observed the non-producing upper wellbore, while the lower well produced. Fluid rheology determined viscosity changes for different HVFR loadings, and fracture modelling assessed the impact of anhydrite on fracture height at different fluid viscosities. Proppant tracers injected in the lower well were logged in both wellbores observing propped communication between layers. Fluid and pressure diagnostics were used to monitor effective drainage between wells over time. During completion of the lower well, two (2) notable pressure communication events were observed in the offsetting upper well. Following the logging applications performed on both wellbores the results displayed three (3) localized points along the offsetting lateral. At which, a propped communication event was observed within a one (1) meter radius of investigation from the offsetting wellbore. The heel-most propped communication event in the offsetting wellbore was correlated to one of two (2) observed pressure communication events. The two (2) other instances of propped communication did not correspond with an observed pressure event. Following the logging application, the lower well was flowed back and put onto production. During this production period, the upper well remained shut in. Subsequent fluid diagnostic responses have indicated an increasing FDI response, facilitating the flow of hydrocarbon from the upper to the lower wellbore. This communication was primarily observed near the heel of both wellbores. Based on the results of the diagnostic tracers, the fracture model was updated to provide a development tool that would be more predictive for fracture height growth around thin anhydrites in the Charlie Lake formation. The technique of fracture stimulation through the anhydrite layer can be used to reduce the total number of wells required to effectively drain the formation.
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Chen, Le. "A FRAME OF REFERENCE FOR RESEARCH OF A BLOCKCHAIN-BASED SOLUTION TO CORPORATE GRC-MANAGEMENT". En Fourth International Scientific Conference ITEMA Recent Advances in Information Technology, Tourism, Economics, Management and Agriculture. Association of Economists and Managers of the Balkans, Belgrade, Serbia, 2020. http://dx.doi.org/10.31410/itema.2020.31.
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This society has faced many sorts of global challenges, especially the world of business and technological innovation, there's no greater aroused general argument nowadays than digital transformation (DT). Among production-oriented Corporates which many of them have begun to integrate digital technology into most areas of their business. How to well fulfill Corporate Governance, Risk and Compliance (GRC) while expanding existing businesses in the dramatic growth in DT environment has become a major challenge for all Corporates. Through a review of previous studying works and based on existing gaps the author evaluated whether there could be the feasibility of a blockchain-based technology being integrated as a solution to Corporate GRC-Management together with the theory of entire personnel's GRC responsibility system which would be parts of an agenda for the future research on this field and also contribute to Corporates in an overall strategic height level to embrace the coming of DT.
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Mulay, Veerendra, Saket Karajgikar, Dereje Agonafer, Roger Schmidt, Madshusudan Iyengar y Jay Nigen. "Computational Study of Hybrid Cooling Solution for Thermal Management of Data Centers". En ASME 2007 InterPACK Conference collocated with the ASME/JSME 2007 Thermal Engineering Heat Transfer Summer Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/ipack2007-33000.
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The power trend for server systems continues to grow thereby making thermal management of data centers a very challenging task. Although various configurations exist, the raised floor plenum with Computer Room Air Conditioners (CRACs) providing cold air is a popular operating strategy. In prior work, numerous data center layouts employing raised floor plenum and the impact of design parameters such as plenum depth, ceiling height, cold isle location, tile openings and others on thermal performance of data center were presented. The air cooling of data center however, may not address the situation where more energy is expended in cooling infrastructure than the thermal load of data center. Revised power trend projections by ASHRAE TC 9.9 predict heat loads as high as 5000W per square feet of compute servers’ equipment footprint by year 2010. These trend charts also indicate that heat load per product footprint has doubled for storage servers during 2000–2004. For the same period, heat load per product footprint for compute servers has tripled. Amongst the systems that are currently available and being shipped, many racks exceed 20kW. Such high heat loads have raised concerns over air cooling limits of data centers similar to that of microprocessors. A hybrid cooling strategy that incorporates liquid cooling along with air cooling can be very efficient in such situations. The impact of such an operating strategy on thermal management of data center is discussed in this paper. A representative data center is modeled using commercially available CFD code. The change in rack temperature gradients, recirculation cells and CRAC demand due to use of hybrid cooling is presented in a detailed parametric study. It is shown that the hybrid cooling strategy improves the cooling of data center which may enable full population of rack and better management of system infrastructure.