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Artículos de revistas sobre el tema "Tree"

Autor: Grafiati

Publicado: 4 de junio de 2021

Última modificación: 25 de julio de 2025

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1

Kim, Ju-Chul, and Sang-Joong Lee. "A Lecture Note for Introduction of Steiner (Fermat) Tree to Electrical Engineering Education - Comparison of Path Lengths of Minimum Spanning Tree and Steiner Tree." Journal of the Korean Institute of Illuminating and Electrical Installation Engineers 33, no. 6 (2019): 9–18. http://dx.doi.org/10.5207/jieie.2019.33.6.009.

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2

Schaar, Günter, and Zdzisław Skupień. "Pairs of trees in tree–tree triangulations." Discrete Mathematics 307, no. 11-12 (2007): 1499–505. http://dx.doi.org/10.1016/j.disc.2005.11.087.

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3

Jasmine, Jasmine, Pankaj Bhambri, and Dr O. P. Gupta Dr. O.P. Gupta. "Analyzing the Phylogenetic Trees with Tree- building Methods." Indian Journal of Applied Research 1, no. 7 (2011): 83–85. http://dx.doi.org/10.15373/2249555x/apr2012/25.

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4

Williams, Roger A. "Use of Randomized Branch and Importance Sampling to Estimate Loblolly Pine Biomass." Southern Journal of Applied Forestry 13, no. 4 (1989): 181–84. http://dx.doi.org/10.1093/sjaf/13.4.181.

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Abstract A previously developed sampling method utilizing randomized branch and importance sampling for the purpose of quickly estimating tree biomass was tested on five loblolly pine (Pinus taeda L.) trees. Results show a wide range of per-tree sampling error, ranging from 5.3 to 28.9%. Largevariation in foliage content among selected branches per treee may be a major source of error. However, the sampling error for the total biomass of the five trees tested was only 3.3%. This sampling method appears to be reliable and efficient in obtaining precise estimates of the total biomassof a populat

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5

Freilicher, Mollie. "Tree by Tree, Yard by Yard: Replanting Worcester's Trees." Arnoldia 69, no. 1 (2011): 2–13. http://dx.doi.org/10.5962/p.258693.

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6

Ko, Sang-Ki, Ha-Rim Lee, and Yo-Sub Han. "State Complexity of Regular Tree Languages for Tree Matching." International Journal of Foundations of Computer Science 27, no. 08 (2016): 965–79. http://dx.doi.org/10.1142/s0129054116500398.

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We study the state complexity of regular tree languages for tree matching problem. Given a tree t and a set of pattern trees L, we can decide whether or not there exists a subtree occurrence of trees in L from the tree t by considering the new language L′ which accepts all trees containing trees in L as subtrees. We consider the case when we are given a set of pattern trees as a regular tree language and investigate the state complexity. Based on the sequential and parallel tree concatenation, we define three types of tree languages for deciding the existence of different types of subtree occu

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7

S Shevtekar, Sumit, Sayeed Khan, Sanket Jhavar, and Harsh Dhawale. "Bo-Tree: An Efficient Search Tree." International Journal of Science and Research (IJSR) 11, no. 12 (2022): 273–77. http://dx.doi.org/10.21275/sr221202123124.

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8

Carmesin, Johannes, Matthias Hamann, and Babak Miraftab. "Canonical trees of tree-decompositions." Journal of Combinatorial Theory, Series B 152 (January 2022): 1–26. http://dx.doi.org/10.1016/j.jctb.2021.08.004.

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9

Kao, Ming-Yang. "Tree Contractions and Evolutionary Trees." SIAM Journal on Computing 27, no. 6 (1998): 1592–616. http://dx.doi.org/10.1137/s0097539795283504.

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10

Bille, Philip, Inge Li Gørtz, Gad M. Landau, and Oren Weimann. "Tree compression with top trees." Information and Computation 243 (August 2015): 166–77. http://dx.doi.org/10.1016/j.ic.2014.12.012.

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11

Margot, F., A. Prodon, and Th M. Liebling. "Tree polytope on 2-trees." Mathematical Programming 63, no. 1-3 (1994): 183–91. http://dx.doi.org/10.1007/bf01582065.

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12

Zhai, Feifei, Jiajun Zhang, Yu Zhou, and Chengqing Zong. "Unsupervised Tree Induction for Tree-based Translation." Transactions of the Association for Computational Linguistics 1 (December 2013): 243–54. http://dx.doi.org/10.1162/tacl_a_00224.

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In current research, most tree-based translation models are built directly from parse trees. In this study, we go in another direction and build a translation model with an unsupervised tree structure derived from a novel non-parametric Bayesian model. In the model, we utilize synchronous tree substitution grammars (STSG) to capture the bilingual mapping between language pairs. To train the model efficiently, we develop a Gibbs sampler with three novel Gibbs operators. The sampler is capable of exploring the infinite space of tree structures by performing local changes on the tree nodes. Exper

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13

Teng, Zhiyang, and Yue Zhang. "Head-Lexicalized Bidirectional Tree LSTMs." Transactions of the Association for Computational Linguistics 5 (December 2017): 163–77. http://dx.doi.org/10.1162/tacl_a_00053.

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Sequential LSTMs have been extended to model tree structures, giving competitive results for a number of tasks. Existing methods model constituent trees by bottom-up combinations of constituent nodes, making direct use of input word information only for leaf nodes. This is different from sequential LSTMs, which contain references to input words for each node. In this paper, we propose a method for automatic head-lexicalization for tree-structure LSTMs, propagating head words from leaf nodes to every constituent node. In addition, enabled by head lexicalization, we build a tree LSTM in the top-

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14

Hasibuan, Moses, Indriyanto ., and Melya Riniarti. "Inventarisasi Pohon Plus Dalam Blok Koleksi Di Taman Hutan Raya Wan Abdul Rachman." Jurnal Sylva Lestari 1, no. 1 (2019): 9. http://dx.doi.org/10.23960/jsl119-16.

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Plus tree inventory was an activity for collecting and compiling data.Collection block was an area within Great Forest Park region that contains different types of plant, either endemic or non-endemic plants, which serves for protection and preservation, research, science, education, support the cultivation, culture, tourism and recreation.The information about the existence of plus trees on the collection block still rare.So, plus tree inventory still necessary to fulfill the data.This research was held in Wan Abdul Rachman Great Forest Park Collection Block at February to March 2012.The aim

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15

Arlander, Annette. "Becoming a tree with a tree." Journal of Dance & Somatic Practices 14, no. 2 (2022): 231–48. http://dx.doi.org/10.1386/jdsp_00081_1.

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This text reflects on an artistic practice based on repeated visits to chosen trees, performing for camera with them in the context of the project ‘Meetings with Remarkable and Unremarkable Trees’. The individual daily practice of becoming a tree, based on a yoga exercise, together with a variety of trees, is complemented with a collective online performance, the ‘Be-coming Tree’ event. The daily practice brought to the fore the tension between a heightened perceptual awareness of the bodymind while balancing and the awareness of the tree and the broader environment. Noticing the tension betwe

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16

Zhang, Yaoqi, Bin Zheng, Brenda Allen, Neil Letson, and Jeff Sibley. "Tree Ordinances as Public Policy and Participation Tools: Development in Alabama." Arboriculture & Urban Forestry 35, no. 3 (2009): 165–71. http://dx.doi.org/10.48044/jauf.2009.029.

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Following a brief overview of the historical evolution of tree ordinances in the United States, this paper focuses on the development of tree ordinances in the state of Alabama to demonstrate how the tree ordinances evolve into law and the role such ordinances have on urban trees. Even though tree ordinances have a long history in the United States, they have been rapidly developing since the 1970s. Among the 100 municipalities that have some type of tree ordinance in Alabama, based on this investigation, the major responsibilities of tree ordinances include: having a tree commission (board),

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17

Hanberry, Brice B., Jacob M. Seidel, and Phillip DeLeon. "Exploring Tree Density Increases after Fire Exclusion in the Northern Front Range and Great Plains, Colorado, USA." Fire 7, no. 4 (2024): 103. http://dx.doi.org/10.3390/fire7040103.

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Since Euro-American settlement and associated fire exclusion, grasslands and open forests have converted to forests throughout the United States. Contributing to the weight of evidence, we determined if forestation also occurred in forests and grasslands of Colorado. Our study extent encompassed landscapes of the 0.5 million ha Arapaho and Roosevelt National Forests in the northern Front Range (eastern side) of the southern Rocky Mountains and the 1 million ha Weld County, which contains Pawnee National Grassland, in the Great Plains grasslands. We quantified tree composition, cover, and densi

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18

Park, Minhyuk, Paul Zaharias, and Tandy Warnow. "Disjoint Tree Mergers for Large-Scale Maximum Likelihood Tree Estimation." Algorithms 14, no. 5 (2021): 148. http://dx.doi.org/10.3390/a14050148.

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The estimation of phylogenetic trees for individual genes or multi-locus datasets is a basic part of considerable biological research. In order to enable large trees to be computed, Disjoint Tree Mergers (DTMs) have been developed; these methods operate by dividing the input sequence dataset into disjoint sets, constructing trees on each subset, and then combining the subset trees (using auxiliary information) into a tree on the full dataset. DTMs have been used to advantage for multi-locus species tree estimation, enabling highly accurate species trees at reduced computational effort, compare

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19

Michalczuk, Jerzy. "The importance of non-forest tree stand features for protection of the Syrian Woodpecker Dendrocopos syriacus in agricultural landscape: a case study from South-Eastern Poland." Agroforestry Systems 94, no. 5 (2020): 1825–35. http://dx.doi.org/10.1007/s10457-020-00498-2.

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Abstract Non-forest tree stands are important habitats for many species of birds in the agricultural landscape. They are also the main habitat of the Syrian Woodpecker Dendrocopos syriacus, whose numbers have been decreasing in recent years in some parts of Europe. Recognition of the habitat requirements of this species may help better planning of its protection in the context of the treed agricultural landscapes. During this study, the habitat preferences of the Syrian Woodpecker were determined in the agricultural landscape of South-Eastern Poland. A set of 12 habitat parameters of tree stan

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20

Beasley, LeRoy B. "Tree Covers of Graphs and their Linear Preservers." Journal of Combinatorial Mathematics and Combinatorial Computing 122, no. 1 (2024): 149–55. http://dx.doi.org/10.61091/jcmcc122-12.

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Let G be an undirected graph. A \textit{vertex tree cover} of G is a collection of trees such that every vertex of G is incident with at least one tree. Similarly, an edge tree cover is a collection of trees such that every edge of G is contained in at least one tree. The tree cover number is defined as the minimum number of trees required in such a cover. In this paper, we demonstrate that when considering specific types of tree covers, only vertex permutations act as linear operators that preserve the tree cover number of G .

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21

Eastham, J., and CW Rose. "Tree pasture interactions at a range of tree densities in an agroforestry experiment. I. Rooting patterns." Australian Journal of Agricultural Research 41, no. 4 (1990): 683. http://dx.doi.org/10.1071/ar9900683.

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The effects of tree density on the distribution of tree and pasture roots under an agroforestry experiment were investigated. Trees were planted in a Nelder fan design, and three planting densities of 2150,304 and 82 stems per hectare were chosen for this study. Proximity to trees and increase in tree density reduced pasture root growth, with lowest concentrations of pasture roots occurring under the highest tree density. Tree root systems were deeper and denser at high tree densities, although total length and mass of roots produced per tree decreased with increasing tree density. Tree root:s

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22

Fu, Qingcheng, Erfa Qiu, Yuan Zhang, Lanhong Huang, Huichao Wang, and Shasha Jiang. "Discussion of the Distribution Pattern and Driving Factors of 2 Large Old Tree Resources in Beijing." Forests 13, no. 9 (2022): 1500. http://dx.doi.org/10.3390/f13091500.

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Known as “living fossils”, large old trees play an important role in ecology, landscape, and culture and are an important part of ecosystems and human settlements. The aim of this paper is to provide suggestions for the protection of urban large old tree resources and the selection of large old tree backup resources. First, we conducted a statistical analysis on the composition, distribution, and important values of large old tree species in Beijing and used Downtrend correspondence analysis (DCA) to analyze the composition of different types of habitat tree species. Second, we created a 3 km

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23

Li, Tie Hua, Shi Zhi Wen, Gong Xiu He, Liang Chen, and Shi Jia Huang. "Study on Superior Tree Selection Methods of Phoebe Hui in Hunan." Advanced Materials Research 1010-1012 (August 2014): 1198–201. http://dx.doi.org/10.4028/www.scientific.net/amr.1010-1012.1198.

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Phoebe hui is a precious timber tree species. In order to get excellent seedlings and stands with good genes and develop Phoebe hui better, it is necessary to select superior trees. The dominant trees comparative method and small sample plot method were used to evaluate and select Phoebe hui superior trees in Longshan county, Hunan province, and the evaluation factors included diameter at breast height (DBH), tree height, timber volume and other quality factors. The results showed that, using the dominant trees comparative method, the DBH, tree height and timber volume values of the superior t

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24

KUMAR, Dr D. SURESH. "THE BAOBAB TREE." Hygeia J. D.Med.10 (1) August 2018 - January 2019 10, no. 1 (2018): 1–2. http://dx.doi.org/10.15254/h.j.d.med.10.2018.16.

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Trees are known to live for many years. Gautama Buddha attained enlightenment while meditating underneath a peepal tree (Ficus religiosa). A branch of the original tree was rooted in Anuradhapura, Sri Lanka in 288 B.C. and is known as Jaya Sri Maha Bodhi. It is the oldest plant in the world. Long-living plants are found in many parts of the world. The Baobab tree is one among them. Baobab is the common name of a genus of trees (Adansonia) distributed in Madagascar, Africa, Australia and India. The Baobab is the national tree of Madagascar. The Baobab is also known as “bottle tree”, “the tree o

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25

Wang, J., and R. Lindenbergh. "VALIDATING A WORKFLOW FOR TREE INVENTORY UPDATING WITH 3D POINT CLOUDS OBTAINED BY MOBILE LASER SCANNING." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLII-2 (May 30, 2018): 1163–68. http://dx.doi.org/10.5194/isprs-archives-xlii-2-1163-2018.

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Urban trees are an important component of our environment and ecosystem. Trees are able to combat climate change, clean the air and cool the streets and city. Tree inventory and monitoring are of great interest for biomass estimation and change monitoring. Conventionally, parameters of trees are manually measured and documented in situ, which is not efficient regarding labour and costs. Light Detection And Ranging (LiDAR) has become a well-established surveying technique for the acquisition of geo-spatial information. Combined with automatic point cloud processing techniques, this in principle

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26

Evert, Dean R., and Paul F. Bertrand. "Survival and Growth of Peach Trees Planted in Killed Bahiagrass at an Old Orchard Site." HortScience 28, no. 1 (1993): 26–28. http://dx.doi.org/10.21273/hortsci.28.1.26.

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More peach [Prunus persica (L.) Batsch.] trees survived when planted in killed bahiagrass (Paspalum notatum Flugge `Paraguayan-22') sod growing between previous orchard tree rows (98%) than when planted in previous tree sites (81%) or in previous tree rows, but halfway between previous tree sites (79%). The previous orchard was removed Nov. 1986, and new trees were planted Feb. 1987. Surviving trees in the killed sod grew better than trees at the other two sites. Tilling the sites before planting did not affect nematode populations or tree survival and growth. Soaking the tree roots in a fenam

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27

Zhou, Qianyi, Zhaohong Jiang, Xin Zhang, et al. "Tree age did not affect the leaf anatomical structure or ultrastructure of Platycladus orientalis L. (Cupressaceae)." PeerJ 7 (October 29, 2019): e7938. http://dx.doi.org/10.7717/peerj.7938.

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Tree aging is a new research area and has attracted research interest in recent years. Trees show extraordinary longevity; Platycladus orientalis L. (Cupressaceae) has a lifespan of thousands of years. Ancient trees are precious historical heritage and scientific research materials. However, tree aging and tree senescence have different definitions and are poorly understood. Since leaves are the most sensitive organ of a tree, we studied the structural response of leaves to tree age. Experiments investigating the leaf morphological structure, anatomical structure and ultrastructure were conduc

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28

Anggun Febriani, Andi Irmayanti Idris, and Rusmidin. "Hubungan Diameter dan Jumlah Koakan Terhadap Produksi Getah Pinus di Desa Sasakan Kecamatan Sumarorong Kabupaten Mamasa." Pangale: Journal of Forestry and Environment 3, no. 2 (2024): 21–27. https://doi.org/10.31605/pangale.v3i2.3864.

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The relationship between diameter and number of cocoons in pine trees has significant relevance in the context of sap production. Tree diameter is often considered an indicator of tree size and health, while the number of cocoons, which are holes where sap is harvested, can directly influence sap production. We can see this from the diameter of the pine trees in Sasakan Village, namely 42.68 cm, which can produce 345 grams/tree. Likewise, the number of koakans on pine trees greatly influences the yield of pine sap, where there are 7 koakans/tree which can produce 448 g/tree. The number of pine

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29

Zaman, Q. U., A. W. Schumann, and H. K. Hostler. "Rapid Estimation of Citrus Tree Damage from Hurricanes in Florida Using an Ultrasonic Tree Measurement System." HortTechnology 16, no. 2 (2006): 339–44. http://dx.doi.org/10.21273/horttech.16.2.0339.

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Many citrus groves in Florida were affected by hurricanes in Summer 2004. A commercial 42-acre `Valencia' sweet orange (Citrus sinensis) grove of 2980 trees was routinely scanned with an automated ultrasonic system to measure and map tree canopy volumes. We estimated tree damage by comparing canopy volumes measured before and after the hurricanes of 2004. Ultrasonically sensed tree canopy volume was mapped and the relative tree canopy volume loss percentage (TCVL%) for each tree was calculated and classified into six categories [≤0 (no damage), 1% to 24%, 25% to 49%, 50% to 74%, 75% to 99%, an

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30

Marini, Richard P. "618 Tree Form and Tree Density Affect Peach Tree Cropping and Profitability." HortScience 34, no. 3 (1999): 554B—554. http://dx.doi.org/10.21273/hortsci.34.3.554b.

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`Norman' peach trees were trained to the central-leader or open-vase form and were planted at high (740 trees/ha) or low (370 trees/ha) density. A third density treatment was a high/low density, where alternate trees in high-density plots were removed after 6 years to produce a low-density treatment. Annual yield per hectare was ≈15% to 40% greater for high-density treatments than for low-density treatments, but tree form had little influence on yield. Fruit size tended to be greater for low-density than for high-density treatments, but cumulative marketable yield was greatest for high-density

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31

Gong, Haoyu, Qian Sun, Chenrong Fang, Le Sun, and Ran Su. "TreeDetector: Using Deep Learning for the Localization and Reconstruction of Urban Trees from High-Resolution Remote Sensing Images." Remote Sensing 16, no. 3 (2024): 524. http://dx.doi.org/10.3390/rs16030524.

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There have been considerable efforts in generating tree crown maps from satellite images. However, tree localization in urban environments using satellite imagery remains a challenging task. One of the difficulties in complex urban tree detection tasks lies in the segmentation of dense tree crowns. Currently, methods based on semantic segmentation algorithms have made significant progress. We propose to split the tree localization problem into two parts, dense clusters and single trees, and combine the target detection method with a procedural generation method based on planting rules for the

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32

Yang, Zi, Ka Wai Hui, Sawaid Abbas, et al. "A Review of Dynamic Tree Behaviors: Measurement Methods on Tree Sway, Tree Tilt, and Root–Plate Movement." Forests 12, no. 3 (2021): 379. http://dx.doi.org/10.3390/f12030379.

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Urban forest ecosystems are being developed to provide various environmental services (e.g., the preservation of urban trees) to urban inhabitants. However, some trees are deteriorated asymptomatically without exhibiting an early sign of tree displacement, which results in a higher vulnerability under dynamic wind loads, especially during typhoon seasons, in the subtropical and tropical regions. As such, it is important to understand the tilt and sway behaviors of trees to cope up with the probability of tree failure and to improve the efficacy of tree management. Tree behaviors under wind loa

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33

Tan, Xiaoyang, Satoshi Hirabayashi, and Shozo Shibata. "Estimation of Ecosystem Services Provided by Street Trees in Kyoto, Japan." Forests 12, no. 3 (2021): 311. http://dx.doi.org/10.3390/f12030311.

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Street trees are integral components of urban green infrastructure. The importance of benefits provided by street trees has motivated the development of various tools to quantify the value of ecosystem services. The i-Tree Eco is a widely applied method for quantifying urban forest structure, ecosystem services, and values. Since its first release in 2006, i-Tree Eco has been successfully utilized in over 100 countries around the world. This study described one of the first applications of the i-Tree Eco international project in Kyoto, Japan, by customizing the models and parameters to enhance

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34

Okonkwo, H. O., R. E. Ubaekwe, A. N. Okeke, and L. C. Malizu. "Phenotypic (Fruit and Seed Characters) Selection of Dacryodes edulis (Don. G. Lam H. J.) Tree for Vegetative Propagation." Nigerian Journal of Environmental Sciences and Technology 5, no. 2 (2021): 347–53. http://dx.doi.org/10.36263/nijest.2021.02.0280.

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The study was conducted to identify superior D. edulis trees using phenotypic characters (fruit and seed size) as the criteria to select candidate trees for subsequent multiplication through vegetative propagation. Five D. edulis compound trees were randomly selected within Onne community in Eleme LGA Rivers state in a preliminary effort to assist households in the selection and multiplication of desirable tree phenotypes. Seeds were extracted by softening fruit with warm water at 57oC. Fruit and seed length (mm), breadth (mm), and thickness (mm) were taken using veneer caliper. Size of fruit

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35

Weinbaum, S. A., F. J. A. Niederholzer, S. Ponchner, et al. "Nutrient Uptake by Cropping and Defruited Field-grown `French' Prune Trees." Journal of the American Society for Horticultural Science 119, no. 5 (1994): 925–30. http://dx.doi.org/10.21273/jashs.119.5.925.

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Four adjacent heavily cropping 12-year-old `Petite d'Agen' prune (Prunus domestica L.) trees were selected, and two of the trees were defruited in late spring (28 May) after the spring growth flush and full leaf expansion. Trees received K daily through the drip-irrigation system, and 15N-depleted (NH4)2SO4 was applied twice between the dates of defruiting and fruit maturation. Trees were excavated at the time of fruit maturity (28 July) and fractionated into their component parts. The following determinations were made after tree excavation and sample processing: tree dry weight, dry weight d

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36

Doccola, Joseph, Sheri Smith, Joseph Fischer, and Brian Strom. "Evaluation of Stem-Injected TREE-äge® (4% Emamectin Benzoate) for Protecting Western White Pines (Pinus monticola) from Mountain Pine Beetle (Dendroctonus ponderosae Hopkins)(Coleoptera: Curculionidae: Scolytinae)." Arboriculture & Urban Forestry 46, no. 5 (2020): 333–46. http://dx.doi.org/10.48044/jauf.2020.024.

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The protection of high-value trees against bark beetles and the development of alternatives to bole sprays is a priority for the tree manager. The objective of this study was to evaluate stem-injected TREE-äge® (emamectin benzoate [EB]) as a protective treatment for western white pines (Pinus monticola Dougl. ex D. Don) against mountain pine beetle (MPB, Dendroctonus ponderosae Hopkins). Treatment efficacy was based solely on tree mortality as per Shea protocols (i.e., ≥ 60% check vs. ≤ 20% treated tree mortality). Our first experiment was installed in 2007 and included trees stem-injected wit

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37

Harman, Dan M., Anne Bourne, and Amy L. Harman. "LOCUST BORER (COLEOPTERA: CERAMBYCIDAE) ATTACK IN RELATION TO PULSED ELECTRIC CURRENT IN BLACK LOCUST TREES." Journal of Entomological Science 24, no. 1 (1989): 124–32. http://dx.doi.org/10.18474/0749-8004-24.1.124.

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Resistance to pulsed electric current (ER) applied to the cambium layer was studied in black locust trees, Robinia pseudoacacia L., in relation to tree thrift indices, and particularly to intensity of current-season attacks by the locust borer Megacyllene robinia. A total of 415 borer attacks were sustained by 241 trees, with a maximum of 20 attacks per tree. Although variation in the data was high both within and among study sites, ER was positively correlated with borer mines per tree and with increased degrees of tree suppression, represented by dominance classes. ER ranged from 2 to 32 koh

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38

Ngetich, Samuel Kiplangat. "Effect of Tapping on Gum and Incense Yield of Selected Trees Species in Elwaye and Dhas Districts, Borana Zone, Southern Oromia." East African Journal of Forestry and Agroforestry 6, no. 1 (2023): 211–26. http://dx.doi.org/10.37284/eajfa.6.1.1334.

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Ethiopia is one of the Gum and Resin producing countries with a large potential. Borana pastoralists particularly utilised these resources as a source of revenue. The majority of Ethiopia’s gum-resin products are collected from natural oozing. In southern Ethiopia, improved tapping mechanisms are uncommon. This study was conducted to determine the effect of different tapping machines and tapping at different tree diameter classes on the gum and incense yields of selected tree species. Commiphora corrugata, Boswellia microphylla, and Boswellia neglecta tree species were selected for their poten

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Abimanyu, Bondan, Rahmat Safe’i, and Wahyu Hidayat. "Application of Forest Health Monitoring Method in Assessing Tree Damage in Metro Urban Forests." Jurnal Sylva Lestari 7, no. 3 (2019): 289. http://dx.doi.org/10.23960/jsl37289-298.

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The assessment of tree condition is very important to ensure visitor safety and to maintain the sustainability of Metro Urban Forest. However, data and information on the condition of trees in six locations of Metro Urban Forest are not yet available. Therefore, this study was conducted to assess tree damage in each Metro Urban Forest. Evaluation of tree damage such as location, type, and level of tree damage was conducted for each tree in accordance with the damage criteria of the Forest Health Monitoring method. Data were then analyzed by calculating the damage index and tree damage level in

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40

Reid, M. L., and S. S. Glubish. "Tree size and growth history predict breeding densities of Douglas-fir beetles in fallen trees." Canadian Entomologist 133, no. 5 (2001): 697–704. http://dx.doi.org/10.4039/ent133697-5.

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AbstractFor bark beetles (Coleoptera: Scolytidae) breeding in fallen trees, the tree characteristics that are associated with higher breeding densities are poorly known. The breeding densities of Douglas-fir beetles, Dendroctonus pseudotsugae Hopkins, in freshly felled Douglas-fir, Pseudotsugae menziesii (Mirb.) Franco, were examined with respect to tree diameter, phloem thickness, and several measures of tree growth rate over the past year to 10 years prior to tree death. Trees were felled in 8 decks of 3–12 trees to provide a range of tree qualities in a given location. Stepwise regression r

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Li, Jian Ke, Jing Hui Yang, Yan Jun Liu, et al. "Growth and Development of Feijoa with Different Plant Shape and in Greenhouses Environment." Advanced Materials Research 886 (January 2014): 294–98. http://dx.doi.org/10.4028/www.scientific.net/amr.886.294.

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In order to explore the relation between tree crown shape and growth development and age of tree, flowering plants, fruiting plants, bearing plants, bearing branch and floweret, length of bearing branch were studied in greenhouse environments after tree corm shape were divided into three groups by live crown ratio of crown width to height and angle from the central leader to first scaffold branch. The result showed that the plants of upright crown shape were 83% at age one year among all plants, 45% at age two years and tree crown shapes, open tree increased to 25% at age of three years. The f

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Hanum, S. F., A. Rahayu, R. Iryadi, and D. P. Darma. "Tree Architecture Model and Tree Health Assessment Using Sonic 3D Tomograph Relationship in Bali Botanical Garden." Jurnal Manajemen Hutan Tropika (Journal of Tropical Forest Management) 29, no. 1 (2023): 99–108. http://dx.doi.org/10.7226/jtfm.29.1.99.

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The incident of fallen trees or broken branches is dangerous for tourists visiting Bali Botanical Garden. Tree health monitoring in locations with high human activity and near valuable properties is mandatory to minimize the potency of tree failure. Since the stand stability is influenced by biological and physical factors, multiple variables consisting of species characteristics (stem form), tree dimensions (height, diameter, and slenderness coefficient), and tree health were used as parameters of tree health. The aim of this study is to examine the health condition of trees located in XIV.G

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43

Rowston, C. "Nest- and refuge-tree usage by squirrel gliders, Petaurus norfolcensis, in south-east Queensland." Wildlife Research 25, no. 2 (1998): 157. http://dx.doi.org/10.1071/wr96065.

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The types of nest trees used by squirrel gliders and the tree types available in the environment were compared. Non-eucalypt trees and smooth-barked eucalypts were significantly under-utilised as nest trees, and iron-barked eucalypts and stags were used as nest trees to a greater degree than would be expected from their availability in the environment. Stags used as nest trees could be of a significantly smaller tree diameter than other tree types, whereas smooth-barked trees used as nest trees were of a significantly larger diameter than all other tree types.

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44

Sarathi, Ramanujam, Arya Nandini, and Michael Danikas. "Understanding Electrical Treeing Phenomena in XLPE Cable Insulation Adopting UHF Technique." Journal of Electrical Engineering 62, no. 2 (2011): 73–79. http://dx.doi.org/10.2478/v10187-011-0012-4.

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Understanding Electrical Treeing Phenomena in XLPE Cable Insulation Adopting UHF TechniqueA major cause for failure of underground cables is due to formation of electrical trees in the cable insulation. A variety of tree structure can form from a defect site in cable insulationvizbush-type trees, tree-like trees, fibrillar type trees, intrinsic type, depending on the applied voltage. Weibull studies indicate that a higher applied voltage enhances the rate of tree propagation thereby reducing the life of cable insulation. Measurements of injected current during tree propagation indicates that t

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Kim, Anastasiia, Noah A. Rosenberg, and James H. Degnan. "Probabilities of Unranked and Ranked Anomaly Zones under Birth–Death Models." Molecular Biology and Evolution 37, no. 5 (2019): 1480–94. http://dx.doi.org/10.1093/molbev/msz305.

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Abstract A labeled gene tree topology that is more probable than the labeled gene tree topology matching a species tree is called “anomalous.” Species trees that can generate such anomalous gene trees are said to be in the “anomaly zone.” Here, probabilities of “unranked” and “ranked” gene tree topologies under the multispecies coalescent are considered. A ranked tree depicts not only the topological relationship among gene lineages, as an unranked tree does, but also the sequence in which the lineages coalesce. In this article, we study how the parameters of a species tree simulated under a c

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Li, Haibin, Xiaowei Zhang, Zeqing Li, Jian Wen, and Xu Tan. "A Review of Research on Tree Risk Assessment Methods." Forests 13, no. 10 (2022): 1556. http://dx.doi.org/10.3390/f13101556.

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As an important part of the urban environment, trees have certain risks while living in harmony with humans. For example, the failure of trees in extreme weather may cause casualties and damage to public and private; the decline and death of old and valuable trees can have an impact on the diversity and cultural value of trees. This paper outlines the theories related to tree risk and the development of tree risk assessment, evaluates the advantages and disadvantages of various tree risk assessment methods in existing studies, and explains some factors affecting the bearing capacity and relate

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Marini, Richard P., and Donald S. Sowers. "Peach Tree Growth, Yield, and Profitability as Influenced by Tree Form and Tree Density." HortScience 35, no. 5 (2000): 837–42. http://dx.doi.org/10.21273/hortsci.35.5.837.

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`Norman' peach [Prunus persica (L.) Batsch] trees were trained to the central-leader or open-vase form and were planted at high (740 trees/ha), or low (370 trees/ha) density. A third density treatment was a HIGH → LOW density, where alternate trees in high-density plots were removed after 6 years to produce a low-density treatment. From 3 to 5 years after planting, trunk cross-sectional areas (TCA) increased most for low-density trees. After 9 years, TCA was greatest for low-density and least for high-density trees. Because of differences in tree training, central-leader trees were taller than

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Wang, Yunhan, Youlv Wu, Qianting Sun, et al. "Tree Failure Assessment of London Plane (Platanus × acerifolia (Aiton) Willd.) Street Trees in Nanjing City." Forests 14, no. 9 (2023): 1696. http://dx.doi.org/10.3390/f14091696.

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The London plane (Platanus × acerifolia (Aiton) Willd.) street tree is a symbolic tree species in Nanjing City, which is known as the “city card”. However, accidents such as street trees falling over cars, affecting traffic, and hurting people have seriously affected the daily lives of citizens. Thus, it is of vital significance to accurately assess the potential for tree failure in London plane street trees in Nanjing City. This study comprehensively considers the growth condition of London plane street trees and their impact on traffic, establishes a scientific street tree failure assessment

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Bakken, Stephen. "Group-Tree Hazard Analysis." Arboriculture & Urban Forestry 21, no. 3 (1995): 150–55. http://dx.doi.org/10.48044/jauf.1995.025.

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Tree hazard control programs focus on individual tree risk analysis. Although microsite conditions are often evaluated, whole forests or groups of trees are rarely considered. A tree hazard program was initiated at a northern California state park in 1969. Since then, hundreds of trees have been removed from the campground to reduce the agency's liability. Nevertheless, hundreds more trees have failed, causing injury and property damage. Traditional single tree risk assessment proved to be inadequate to stabilize this forest. Consequently, the environmental dynamics of the entire forest were a

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Attis Beltrán, H., G. Martínez Pastur, H. Ivancich, M. V. Lencinas, and L. M. Chauchard. "Tree health influences diameter growth along site quality, crown class and age gradients in Nothofagus forests of southern Patagonia." Journal of Forest Science 59, No. 8 (2013): 328–36. http://dx.doi.org/10.17221/30/2013-jfs.

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We examined the influence of tree health on annual diameter increment of trees along gradients in stand site quality, crown classes and tree age in Nothofagus pumilio forests of Southern Patagonia. Healthy trees had higher annual diameter increment than unhealthy trees along all gradients (site quality, crown class, tree age). We argue that tree health could be employed as a qualitative variable in models of tree growth to estimate aboveground biomass and carbon stocks in this forest system. &nbsp;

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