Results 21 to 30 of about 3,736,035 (302)

Rate of Relative Growth of Orthogonal Polynomials

open access: yesJournal of Mathematical Analysis and Applications, 1993
Suppose \(p_ n(x)\) \((n=0,1,2,\dots)\) is a sequence of polynomials in the variable \(x\) defined by the recurrence \[ xp_ n(x)=a_{n+1}p_{n+1}(x)+b_ np_ n(x)+a_ np_{n-1}(x), \] with \(p_ 0\) a positive constant and \(p_{-1}=0\). A uniform upper bound is obtained for \[ {| p_ n(x)|^ p\over\sum_{k=0}^ n| p_ k(x)|^ p} \] for \(x\in[b-a,b+a]\) in case the
Nevai, P., Zhang, J.
openaire   +2 more sources

The Determination of Relative Elemental Growth Rate Profiles from Segmental Growth Rates (A Methodological Evaluation) [PDF]

open access: yesPlant Physiology, 1997
Abstract Relative elemental growth rate (REGR) profiles describe spatial patterns of growth intensity; they are indispensable for causal growth analyses. Published methods of REGR profile determination from marking experiments fall in two classes: the profile is either described by a series of segmental growth rates, or calculated as the
W. S., Peters, N., Bernstein
openaire   +2 more sources

BIRTH AND DEATH RATES, NATIONAL POPULATION FORECAST AND POPULATION POLICIES [PDF]

open access: yesIranian Journal of Public Health, 1971
This study is analyses of national population estimates and aims for the next 20 to 50 years. Calculations are based on the population of 32 million in 1973 with the relative growth rate of 32 in 1000 and death rate of 16 in 1000.Considering various aims,
K Merat
doaj   +2 more sources

Yield and Growth Indices of Hybrid Maize (Zea mays L.) as Influenced by Inter and Intra Row Spacing

open access: yesZanco Journal of Pure and Applied Sciences, 2022
To study the yield and physiological growth indices of hybrid maize a field experiment was conducted during the main cropping season under rain-fed conditions in 2020 and 2021 at Ankawa Research Center and Qushtapa zones of northern Iraq to determine ...
Alan Khasro Jawhar, Aryan S. A. Dizayee
doaj   +1 more source

Growth analysis of an aged Turkey oak coppice under conversion into high forest

open access: yesAnnals of Silvicultural Research, 2020
Most Italian research concerning the conversion of coppices analyse growth response at the stand level and adopt absolute growth as reference metric. Nonetheless, inter-individual interactions are lost when averaging tree level information at the stand ...
Monica Notarangelo, Orazio La Marca
doaj   +1 more source

Response of vegetative and morphological characteristics of common mesquite (Prosopis juliflora (Swartz) DC.) seedling, under different humidity and light factors [PDF]

open access: yesتحقیقات جنگل و صنوبر ایران, 2015
Light and moisture are two important environmental factors that influence seedling growth, therefore the choice of appropriate combinations of these factors is important for afforestation projects.
Babak Pilevar   +2 more
doaj   +1 more source

Unexpected Intraspecific Variability of Perennial Ryegrass (Lolium perenne L.) in Response to Constant Temperature During Germination and Initial Heterotrophic Growth

open access: yesFrontiers in Plant Science, 2022
Lolium perenne (L.) is one of the most important species in temperate grasslands. Temperature is a major factor controlling plant development. Breeding L. perenne cultivars adapted to new ranges of temperature could be necessary under most climate change
Lina Q. Ahmed   +1 more
doaj   +1 more source

A Sceptics View: “Kleiber’s Law” or the “3/4 Rule” is neither a Law nor a Rule but Rather an Empirical Approximation

open access: yesSystems, 2014
Early studies showed the metabolic rate (MR) of different-sized animals was not directly related to body mass. The initial explanation of this difference, the “surface law”, was replaced by the suggestion that MR be expressed relative to massn, where the
A. J. Hulbert
doaj   +1 more source

Yield Comparison of Sesame Cultivars and Their Physiological Growth Indices Under Chemical and Biological Potassium Fertilizer Applications [PDF]

open access: yesIkufīziyuluzhī-i Giyāhān-i Zirā̒ī, 2018
To compare the yield and physiological growth indices of three Iranian sesame cultivars under the application of chemical and biological potassium fertilizers a pot experiment was conducted in the summer of 2015 in greenhouse. This study was performed as
Hamid Madani   +2 more
doaj  

RELATIVE GROWTH RATE: THE TWO-PHASE CURVE [PDF]

open access: yesHortScience, 1990
The growth and development patterns of fruit have been studied for many years and it has become traditional to think of peaches as having a double sigmoid pattern with three main stages fruit growth. This concept is primarily based on analyses of fruit absolute growth rates An alternative approach is to express growth on a relative growth rate (RGR ...
openaire   +1 more source

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