... is the radius of the Earth From (6), when the f reaches near the fRcmR, the vRgmR approaches zero, and if the f is greater than the fRcmR, the vRgmR approaches to the speed of light When the ... boundaries of the EIWG with the incident angle θ (excepting the TEM mode), so the speed of energy propagation of each mode is smaller than the speed of light For the given mode (e.g TM mode), the group ... boundary contains the images of the ELF/VLF wave sources and the curves present the polarized wave The curves on the left side of the electric field lines represent the variations in the vertical
Ngày tải lên: 14/10/2022, 13:35
... visualizer: The integrated visualization component allows for the visualization of the topology and the exchanged messages of the simulated P2P system Dealing with the presenta-tion of the topology, the ... lack in the simula-tion of another efficient type of the structured overlays i.e tree based overlay networks Hence, we present a case study of the implementation of the binary and multiway tree ... networks as they reduce the search cost in terms of logarithmic to the base m, where m is fanout of the tree To the best of our knowledge, a detailed case study guiding about an applicability of a simulator
Ngày tải lên: 19/11/2022, 11:42
Báo cáo khoa học: "First observations on the root morphology and symbioses of 21 major tree species in the primary tropical rain forest of French Guyana" pps
... con-cerned the part of the stands above ground, and little attention has been paid to the inter-actions between trees within the soil This should be an important part of any modelling of the spatial ... extensively sampled at the seedling stage (> 100 individuals). Sampling was performed all year long, on either roots of mature trees (roots were traced from the base of the tree) or seedlings ... very rapidly after the apparition of the short root, close to the elongating tip of the long root The most spectacular diversity was found on Voua-capoua americana and on the 2 Eperua species
Ngày tải lên: 08/08/2014, 19:21
Báo cáo hóa học: " Atomic force microscopy investigation of the kinetic growth mechanisms of sputtered nanostructured Au film on mica: towards a nanoscale morphology control" pot
... optical devices The study of the morphology of such films with the variation of thickness and thermal processes gives an idea about the growth mechanism of these films [5-7] Study of morphology and ... V7.00 software: it is defined by 1 2 1 1 2 N / where N is the number of data points of the profile, yi are the data points that describe the relative vertical height of the surface, ... formation of the Au clusters, first of all, we analyzed the morphology of the starting Au film after the 573 K-900 s So, Figure 3a,b shows 20 μm × 20 μm and 10 μm × 10 μm AFM images of the Au film
Ngày tải lên: 21/06/2014, 05:20
Báo cáo sinh học: "Search for a ‘Tree of Life’ in the thicket of the phylogenetic forest" doc
... measure of how representative the topology of the given tree is of the entire forest of life (the IS is the fraction of the times the splits from a given tree are found in all trees of the forest) The ... observations that HGT spares F Similarity of the trees in the forest of life to the NUTs ((aa)) For each of the 102 NUTs, the breakdown of the rest of the trees in the forest by 0% 20% 40% 60% 80% 100% ... analysis of the entire set of 6,901 trees in the forest was beyond the capacity of the R software package used for this analysis; however, the set of COG trees included most of the trees with
Ngày tải lên: 06/08/2014, 19:20
Báo cáo lâm nghiệp: "Results of a phenological study of the tree layer of a mixed stand in the region of the Drahanská vrchovina Upland" ppt
... sum of effective temperatures before the onset of the monitored stage in the area of the Drahanská vrchovina Upland for the period 2004–2007 The onset and duration of phenological stages of plants ... occurred between the 127th day at the sum of temperatures 330.8°C (2000) and the 163rd day at the sum of temperatures 161.6°C in 1991 The period of the photosynthetic activity of a leaf area is ... tempera-tures in the period before the onset of the phenologi-cal stage REsULts AnD DiscUssion The aim of the paper was to evaluate phenological stages of a tree layer in a mixed stand in relation to the
Ngày tải lên: 07/08/2014, 03:22
Báo cáo lâm nghiệp: " Dynamics of tree species composition and characteristics of available space utilization in the natural forest of the National Nature Reserve Hrončokovský Grúň" pot
... defined as the average height of 10% of the thickest trees in the transect The formula for the calculation of utilization of Trunk volumes of individual tree species were ReSultS utilization of available ... the analysis of living trees, this procedure indirectly evaluates the variability of the dying-off of trees within individual developmental stages In the advanced phase of the growth stage, the ... relationships of tree species in the natural forest The volume growth of a tree is most influenced by the volume of the assimilatory apparatus – tree crown To assess the growing processes of individual tree
Ngày tải lên: 07/08/2014, 10:22
Báo cáo lâm nghiệp: "Variation of the tree form factor and taper in European larch of Polish provenances tested under conditions of the Beskid Sądecki mountain range (southern Poland)" docx
... 3The estimation of variation of the tree form factor for all data within individual provenances was done in several stages Since the values of the tree form factor most often depend on the tree ... analysis of variance Stand density is one of the hypothetic factors that may affect the stem form of trees This is why also the analyses determining the relationship between the variation of the stem ... On the basis of the analysis of variance, with the previous test of homogeneity of variance, it was found that the observed differences in the mean values of the breast height form factor of
Ngày tải lên: 07/08/2014, 10:22
Báo cáo toán học: "Maximum Multiplicity of a Root of the Matching Polynomial of a Tree and Minimum Path Cover" pdf
... different proofs can be illuminating For the sake of completeness, we include the proof in the next section Theorem 3.3 (The Stability Lemma for Trees) Let T be a tree and let θ be a root of µ(T, ... devoted to the proof of Theorem 3.3, which will follow from the following theorem Theorem 4.1 Let T be a tree and let θ be a root of µ(T, x) Then there exists a θ-eigenvector f of T such that f ... below) However, using the idea of the proof of Theorem 5.3 in [3], we shall prove the Stability Lemma for trees with any given root of its matching poynomial Note that the Stability Lemma is
Ngày tải lên: 07/08/2014, 21:21
Báo cáo khao học: "Heterogeneity and differentiation of the tree flora in three major land uses in Guangzhou City, China" pps
... park In the whole study area, of the top 25 species which collectively contribute 70% of the trees, 15 are exotic taking 39.7% of the trees The 10 principal natives are listed in table IV The common ... institutional trees were sampled, the latter tree population upon extrapola-tion could reach 61 172 trees, which makes it the most abundant group amongst the forest types The inclusion of extrapolation ... the most (46 spe-cies), and park (15) and roadside (17) much less The ubiquitous group collectively contributes 103 266 trees, that is 89.7% of the sampled trees in the study area (table V) The
Ngày tải lên: 08/08/2014, 14:20
Báo cáo toán học: "Preliminary measurement and simulation of the spatial distribution of the Morphogenetically Active Radiation (MAR) within an isolated tree canopy" docx
... from the bottom to the top of the tree crown Like in the PAR domain, the variability of the transmittance was more marked at the top and the bottom than in middle part of the tree crown The difference ... Incident radiation The spectral distribution of the incident radiation as used in the model is the global radiation and the propor-tion of diffuse above the canopy tree Spectra of incident global ... whereas the transmit-tance ranged between 0.03 and 0.16 around a mean value of 0.07 The variability of leaf transmittance was more marked at the top and the bottom than in the middle part of the tree
Ngày tải lên: 08/08/2014, 14:22
Báo cáo khoa học: "The effect of light acclimation of single leaves on whole tree growth and competition – an application of the tree growth model ALMIS" doc
... within their crowns increased more than in the crown of the shade type Therefore, the first leaf of the shade type still assimilated more carbon than the first leaves of either of the other types ... biomass increase of about 30% The effects of the variation of the initial slope of the photosynthetic light curve are therefore more pronounced (+28 and Table II Sensitivity of predicted tree growth ... growth of whole trees, either in isolation or in competition The study adresses the question whether the low competitive-ness of black alder trees could be attributed to the observed absence of leaf
Ngày tải lên: 08/08/2014, 14:22
Báo cáo khoa học: "yield of maritime pine (Pinus pinaster Ait): the average dominant tree of the stand" pps
... (N); - the dominant basal area go (cm ), ie, the aver-age tree basal area of the 100 thickest trees per ha.g was considered to represent the basal area of the average dominant tree - the dominant ... objective of this study was also to identify the competition type of the domi-nant average tree: does the density of the surrounding non-dominant stand have a negative influence on growth of the ... include these aspects in the model itself MATERIAL AND METHODS Variables assessed The following variables were assessed in exper-imental plots: - the age A of the stand (years); - the number of trees
Ngày tải lên: 08/08/2014, 23:22
Báo cáo y học: "Rooting the eutherian tree: the power and pitfalls of phylogenomics" potx
... monitored the BPs as well The shift of BPs for each tree was very similar Three phylogenetic hypotheses for the root of theeutherian tree Figure 1 Three phylogenetic hypotheses for the root of theeutherian ... and the differences in the log-likelihoods of alternative trees from that of the ML tree ± 1 standard error were estimated using the formula of Kishino and Hasegawa [28] Numbering of the trees ... the human data; search of the armadillo and elephant genomic data for homologs of the human exons; collection of the homologous exons from other mammalian genomic data; and alignment of all of
Ngày tải lên: 14/08/2014, 08:20
The composition and morphology of amphiboles from the rainy creek complex, near libby, montana
... the same analyses plotted with all Fe calculated as Fe3+. The Y-axis represents the amount of Na + K in the A-site of the amphibole structure, and the X-axis the amount of Na in the B-site. The ... of the textural characteristics of the amphiboles shows the material to include a complete range of morphologies from prismatic crystals to asbestiform fibers The morphology of the majority of ... of the amphibole from Vermiculite Mountain was done in the spring of 2000 with the purpose of collecting a representative suite of amphib-ole compositions contained within the mined area of the
Ngày tải lên: 14/02/2016, 08:55
DSpace at VNU: Controlling micro- and nanofibrillar morphology of polymer blends in low-speed melt spinning process. Part III: Fibrillation mechanism of PLA PVA blends along the spinline
... controlled by the changes in the spinning conditions The lengths and diameters of the PLA fibrils are caused not only by the deformation of their initial sizes but also by the combination of the deformation, ... similar to that of maximum ASR as discussed above This means that the higher the value of maximum ASR, the higher the value of tensile stress is The simultaneous increase of both the tensile stress ... that of other spin-ning conditions The mean diameters of the PLA fibrils d in these spinning conditions are larger than that of other spinning conditions (Table III, Figure 10) Furthermore, the
Ngày tải lên: 16/12/2017, 07:54
Circle life of the tree
... in the boxes Trang 12reading cornerTrang 13First, you plant a seedand it grows into a seedling Then the seedling turns into a small tree Next, the small tree grows into a tree After that, the tree ... tree grows flower Then the flower grows into fruit Final, the fruits give the seeds and the life cycle of an apple tree continues Trang 14Choose and write.Life cycle of an apple tree Trang 15practising ... cycle of a tree Trang 6The life circle of an apple treeTrang 7Work in groupTrang 8watching cornerreading corner practising corner Trang 9watching corner in the box. Trang 11Small treeWrite the
Ngày tải lên: 14/01/2018, 15:53
The biology and external morphology of bees
... the compound eyes do not nearly reach the upper margin of the sides of the head, whereas in the males of certain species of Boinbus and Apis (Fig 4) the compound eyes extend over the top of ... margins of the compound eyes This region of the head contains three ocelli of varying size (Fig 2a) They are usually arranged in the form of a broad triangle at the summit of the vertex, but their ... narrow in males of Apis to three times the width of the compound eyes in females of certain Osmia Between the lower margin of the compound eye and the base of the mandible is an area of variable
Ngày tải lên: 12/07/2018, 11:18
The biology and external morphology of bees
... the compound eyes do not nearly reach the upper margin of the sides of the head, whereas in the males of certain species of Boinbus and Apis (Fig 4) the compound eyes extend over the top of ... margins of the compound eyes This region of the head contains three ocelli of varying size (Fig 2a) They are usually arranged in the form of a broad triangle at the summit of the vertex, but their ... narrow in males of Apis to three times the width of the compound eyes in females of certain Osmia Between the lower margin of the compound eye and the base of the mandible is an area of variable
Ngày tải lên: 28/07/2018, 08:52
The biology and external morphology of bees
... the compound eyes do not nearly reach the upper margin of the sides of the head, whereas in the males of certain species of Boinbus and Apis (Fig 4) the compound eyes extend over the top of ... margins of the compound eyes This region of the head contains three ocelli of varying size (Fig 2a) They are usually arranged in the form of a broad triangle at the summit of the vertex, but their ... narrow in males of Apis to three times the width of the compound eyes in females of certain Osmia Between the lower margin of the compound eye and the base of the mandible is an area of variable
Ngày tải lên: 15/12/2018, 08:25
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