The relative volume growth of minimal submanifolds

2002 ◽  
Vol 79 (6) ◽  
pp. 507-514 ◽  
Author(s):  
Steen Markvorsen ◽  
Vicente Palmer
Keyword(s):  
Volume Growth ◽  
Minimal Submanifolds ◽  
Relative Volume

The relative volume growth of minimal submanifolds

2002 ◽  
Vol 79 (6) ◽  
pp. 507-514
Author(s):  
S. Markvorsen ◽  
V. Palmer
Keyword(s):  
Volume Growth ◽  
Minimal Submanifolds ◽  
Relative Volume

Calculation of Attachment Energies and Relative Volume Growth Rates As an Aid to Polymorph Prediction

2005 ◽  
Vol 5 (3) ◽  
pp. 879-885 ◽  
Author(s):  
David S. Coombes ◽  
C. Richard A. Catlow ◽  
Julian D. Gale ◽  
Andrew L. Rohl ◽  
Sarah L. Price
Keyword(s):  
Growth Rates ◽  
Volume Growth ◽  
Relative Volume

Distribution of relative growth rates and variation of cytohistological zonation in apical meristems of seedlings of two contrasting open-pollinated jack pine (Pinusbanksiana) families

1984 ◽  
Vol 14 (3) ◽  
pp. 297-310 ◽  
Author(s):  
Antoine Kremer
Keyword(s):  
Growth Rates ◽  
Apical Meristem ◽  
Volume Growth ◽  
Jack Pine ◽  
Relative Volume ◽  
Relative Growth ◽  
Relative Growth Rates ◽  
Apical Dome ◽  
Dome Growth ◽  
General Method

A general method is developed to obtain relative growth rates in different parts of an apical meristem, bare apical dome, internode, and whole apical dome. Expressions are given for transverse, longitudinal, and volume growth. It is shown that these growth rates depend on only four parameters, radius (Ro) and height (Ho) of the bare apical dome and transverse (r) and longitudinal (h) plastochron ratios. A method is described to obtain relative volumes of different zones in apices showing cytohistological zonation using relative area measurements on median longitudinal sections. Both methods are applied to a practical example, on ontogenetical variation of seedlings originating from two open-pollinated families of jack pine (Pinusbanksiana Lamb.) that exhibited a contrasting pattern of height growth in previous studies. Both families differ in their plastochron duration (PD) and this difference can be related to different distributions of growth rates in the apical meristem. PD values range, between 16–6 h in the first family, and between 12–4 h in the second one. Most family differences appear on bare apical dome growth rates and on allometric coefficients between bare apical dome growth and intermode growth. As an example, bare apical dome radial relative growth rates per PD varies during ontogeny from 0.004 to 0.008 and then decreases to −0.011 during the first 70 days after germination for the first family. Corresponding values for the second family are 0.001, 0.007, and −0.004. There are also ontogenetical variations in cytohistological zonation. Both families show an increase in the apical initial plus central mother cell zone relative volume following the decrease of plastochron duration. However, no significant differences between families are obtained for relative volumes of cytohistological zones. Relationships between distributions of growth rates and changes of cytohistological zonation are discussed.

Wood ash as a fertilizer on drained mires — growth and foliar nutrients of Scots pine

2005 ◽  
Vol 35 (11) ◽  
pp. 2734-2742 ◽  
Author(s):  
Mikko Moilanen ◽  
Klaus Silfverberg ◽  
Hannu Hökkä ◽  
Jorma Issakainen
Keyword(s):  
Scots Pine ◽  
Field Experiments ◽  
Volume Growth ◽  
Wood Ash ◽  
Relative Volume ◽  
Foliar Nutrients ◽  
Nutrient Concentrations ◽  
Anova Model ◽  
Foliar Nutrient ◽  
High Doses

The availability of phosphorus (P) and potassium (K) commonly limits tree growth on drained peatlands. The nutritional status and volume growth of Scots pine (Pinus sylvestris L.) after varying doses of wood ash fertilization were investigated in seven field experiments located on deep-peated sites in Finland between latitudes 63°N and 67°N. Needle samples were taken 14–20 years after fertilization and trees measured 15 years after fertilization. Annual growth rates and differences in foliar nutrients were analyzed with a two-way ANOVA model. A regression model was used in the analysis of periodic relative volume growth. High doses of wood ash (100–265 kg P·ha–1, 225–450 kg K·ha–1) resulted in greater changes in foliar nutrient concentrations and in a stronger growth response than low doses (5–50 kg P·ha–1, 14–210 kg K·ha–1). Significant increases in needle mass and concentrations of P, K, and B were observed in the ash-fertilized stands, with a good status for these elements 20 years after fertilization. Depending on the ash dose, the mean annual volume growth was 0.5–1.4 m3·ha–1 higher than in the control plots during the 15 year postfertilization period.

Relationship between Cross-Border Mergers and Acquisitions and International Trade: The Case of Russian Pharmaceutical Industry

2020 ◽  
pp. 81-94
Author(s):  
Alexandra V. Chugunova ◽  
Olga A. Klochko
Keyword(s):  
International Trade ◽  
Mergers And Acquisitions ◽  
Volume Growth ◽  
Pharmaceutical Products ◽  
Pharmaceutical Companies ◽  
Cross Border ◽  
Export Volume ◽  
Relationship Of ◽  
Geographical Diversification ◽  
The Relationship

This research studies the relationship of cross-border mergers and acquisitions to international trade through the lens of Russian pharmaceutical market. To this aim, the study analyses the woks of foreign economists dedicated to evaluating the link between foreign direct investment and international trade, and the influence of mergers and acquisitions on countries’ export and import flows. The research also presents a correlation analysis between the volume of Russian pharmaceutical exports and imports and cross-border deals performed by foreign pharmaceutical companies in Russia. We characterize these deals and conduct a comparative analysis of the regional structure of Russian pharmaceutical exports and imports as well as of the countries of origin of buyers in cross-border mergers and acquisitions. The results of the analysis indicate a positive relationship between cross-border mergers and acquisitions and Russian pharmaceutical exports, which is reflected in the export volume growth and its geographical diversification. However, it is outlined that particular problems of the industry hinder the amelioration of Russian positions in international exports. Similarly, the relationship between cross-border deals and Russian imports is positive: the major pharmaceutical products supply flow occurs from the countries of origin of buyers in cross-border mergers and acquisitions conducted in the Russian pharmaceutical sector.

Normal cerebral ventricular volume growth in childhood

2020 ◽  
Vol 26 (5) ◽  
pp. 517-524
Author(s):  
Noah S. Cutler ◽  
Sudharsan Srinivasan ◽  
Bryan L. Aaron ◽  
Sharath Kumar Anand ◽  
Michael S. Kang ◽  
...  
Keyword(s):  
Brain Mri ◽  
Volume Growth ◽  
Ventricular Volume ◽  
Growth Patterns ◽  
Diagnostic Process ◽  
Growth Charts ◽  
Normal Brain ◽  
Mr Images ◽  
Ventricular Volumes ◽  
Brain Mr Images

OBJECTIVENormal percentile growth charts for head circumference, length, and weight are well-established tools for clinicians to detect abnormal growth patterns. Currently, no standard exists for evaluating normal size or growth of cerebral ventricular volume. The current standard practice relies on clinical experience for a subjective assessment of cerebral ventricular size to determine whether a patient is outside the normal volume range. An improved definition of normal ventricular volumes would facilitate a more data-driven diagnostic process. The authors sought to develop a growth curve of cerebral ventricular volumes using a large number of normal pediatric brain MR images.METHODSThe authors performed a retrospective analysis of patients aged 0 to 18 years, who were evaluated at their institution between 2009 and 2016 with brain MRI performed for headaches, convulsions, or head injury. Patients were excluded for diagnoses of hydrocephalus, congenital brain malformations, intracranial hemorrhage, meningitis, or intracranial mass lesions established at any time during a 3- to 10-year follow-up. The volume of the cerebral ventricles for each T2-weighted MRI sequence was calculated with a custom semiautomated segmentation program written in MATLAB. Normal percentile curves were calculated using the lambda-mu-sigma smoothing method.RESULTSVentricular volume was calculated for 687 normal brain MR images obtained in 617 different patients. A chart with standardized growth curves was developed from this set of normal ventricular volumes representing the 5th, 10th, 25th, 50th, 75th, 90th, and 95th percentiles. The charted data were binned by age at scan date by 3-month intervals for ages 0–1 year, 6-month intervals for ages 1–3 years, and 12-month intervals for ages 3–18 years. Additional percentile values were calculated for boys only and girls only.CONCLUSIONSThe authors developed centile estimation growth charts of normal 3D ventricular volumes measured on brain MRI for pediatric patients. These charts may serve as a quantitative clinical reference to help discern normal variance from pathologic ventriculomegaly.

Wachstum und Wertleistung der Douglasie in Abhängigkeit von der Standraumgestaltung

2012 ◽  
Vol 163 (3) ◽  
pp. 96-104 ◽  
Author(s):  
Joachim Klädtke ◽  
Ulrich Kohnle ◽  
Edgar Kublin ◽  
Andreas Ehring ◽  
Hans Pretzsch ◽  
...  
Keyword(s):  
Wood Quality ◽  
Volume Growth ◽  
Static Stability ◽  
Douglas Fir ◽  
Breast Height ◽  
Monetary Analysis ◽  
Starting Conditions ◽  
Tree Number ◽  
Clear Differentiation ◽  
Further Development

Growth and value production of Douglas-fir under varying stand densities The investigation is focused on the effects of initial tree number and thinning on growth and value performance of Douglas-fir stands. Data base is a coordinated Douglas-fir spacing experiment in South Germany, started 40 years ago and comprising variants of tree numbers with 500, 1,000, 2,000 and 4,000 Douglas-firs per hectare. The treatment was performed according to a standardized experiment program. The results show that at low initial tree numbers, the diameter on breast height (DBH) of (pre)dominant trees at the beginning of the observations (with 12 m top height) is bigger than at higher initial plant numbers. Accordingly, the quotient of height (H) to DBH (as an indicator for tree's static stability) is lower. The further development of DBH and H/DBH quotient is decisively determined by stand treatment, which superimposes the effect of the initial tree number. The total volume growth shows a clear differentiation, too, the variants with initially high tree numbers appearing on top. In the monetary analysis, this ranking is reversed: despite a supposed inferior wood quality, the variants with lower initial tree numbers clearly outperform the ones with higher numbers in terms of value. From these results, the following silvicultural recommendations for Douglas-fir can be derived: the initial tree numbers should be in the range from 1,000 to 2,000 plants per hectare. On technically not accessible sites, even lower tree numbers may come into question. The strong influence of stand treatment on DBH and H/DBH development highlights the problem of postponed thinnings, for this causes growth and stability losses even under favorable starting conditions in terms of competition.

Software platform for automated preparation and analytical processing of heterogeneous datasets

2020 ◽  
pp. 15-20 ◽  
Author(s):  
E. D. Avedyan ◽  
I. V. Voronkov
Keyword(s):  
Data Processing ◽  
Analytical Data ◽  
Volume Growth ◽  
Software Platform ◽  
External Data ◽  
Heterogeneous Datasets ◽  
Data Volume ◽  
Processing Resources ◽  
Modular Platform ◽  
Network Technologies

Summary: the article proposes new software platform for automating the processes of preprocessing and marking up datasets with the aim of further solving analytical problems such as image classification and processing textual and parametric information using neural network technologies. The software platform uses modern technologies and combines a large number of methods in the form of a modular platform, which can be supplemented as the tasks of analytical data processing become more complicated. The need to develop such a software platform is dictated primarily by the fact that, given the current level of data volume growth, the actual transition to deep data analytics remains unattainable without such software platforms, since confidentiality, access to information and the use of external data processing resources are required.

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