Results 1 to 10 of about 1,716,518 (288)

Developmental stages and important periods of probability cognition in 6 to 14 year-old students [PDF]

open access: yesAvances de Investigación en Educación Matemática, 2017
This study chose 906 students of 6 to 14 years of age and focused on the developmental stages and important periods of probability cognition. The study shows that probability cognition of students aged 6-14 experiences the following 5 stages: slow ...
Zikun Gong, Shengqing He
doaj   +3 more sources

Assessment of Effective Factors on Duration of Rainfed Barley Phenological Stages in Semi-Arid Climate Using Principal Component Analysis [PDF]

open access: yesمدیریت بیابان, 2022
Due to the water shotages in arid and semi-arid climates, rainfed agriculture faces severe challenges. It is therefore essential to carry out specific studies on the efficiency factors of rain-fed crop growth.
Younes Khoshkhoo, Neshat Jahannemaei
doaj   +1 more source

Historical and local studies activity of Lugansk region studentship development stages in the Soviet and post-Soviet periods

open access: yesВестник Тамбовского университета. Серия: Гуманитарные науки, 2023
Importance. An important place in modern reform context of the Russian Federation higher school system is acquired by the process of organizing historical and local studies activities aimed at the development of citizenship and patriotism, socialization ...
T. Y. Anpilogova
doaj   +1 more source

Genetic architecture of rainbow trout survival from egg to adult [PDF]

open access: yes, 2010
Survival from birth to a reproductive adult is a challenge that only robust individuals resistant to a variety of mortality factors will overcome. To assess whether survival traits share genetic architecture throughout the life cycle, we estimated ...
Kause, A.   +5 more
core   +9 more sources

Understanding Phenological Stages of Pomegranates vis-à-vis Flowering and Fruiting Regulation

open access: yesJournal of Horticultural Research, 2021
A thorough understanding of plant behavior at different growth stages is of paramount importance for fruit quality improvement, the regulation of production periods, and reduced fruit production costs.
Kumar Raj   +4 more
doaj   +1 more source

Plasma levels of luteinizing hormone and prolactin in relation to double brooding in Great Tit (Parus major)

open access: yesAvian Research, 2022
The reproductive behaviors of birds are mainly controlled by the hypothalamus-pituitary-gonad axis. Many studies have shown that reproductive hormones are tightly linked to the breeding sub-stages.
Xudong Li   +4 more
doaj   +1 more source

Comparative life stages and behavioral characteristics of two Spilomelinae moths with overlapping feeding periods on Azolla spp., in the northern Iran [PDF]

open access: yesJournal of Crop Protection, 2023
Diasemiopsis ramburialis and Nomophila noctuella are moths from Spilomelinae (Lepidoptera: Crambidae) with an overlapping feeding period on Azolla spp. in northern Iran. Due to some morphological similarities, immature stages often lead to confusion.
Atousa Farahpour-Haghani, Mahdi Jalaeian
doaj   +1 more source

Shortened key growth periods of soybean observed in China under climate change

open access: yesScientific Reports, 2021
Phenology is an important indicator of global climate change. Revealing the spatiotemporal characteristics of crop phenology is vital for ameliorating the adverse effects of climate change and guiding regional agricultural production.
Qinghua Tan   +3 more
doaj   +1 more source

Effect of storage time on the chemical composition of whole and grainless corn plant silage harvested at different maturity stages [PDF]

open access: yesRevista Brasileira de Zootecnia, 2022
The objective of this study was to evaluate the effect of harvesting corn at different maturity stages for silage production combined with four storage periods, considering nutrient loss and the chemical composition of silage of the whole plant and also ...
André Martins de Souza   +6 more
doaj   +1 more source

Explicit modeling of multi-period setup times in proportional lot-sizing and scheduling problem with variable capacity [PDF]

open access: yesArchives of Control Sciences, 2021
Small bucket models with many short fictitious micro-periods ensure high-quality schedules in multi-level systems, i.e., with multiple stages or dependent demand. In such models, setup times longer than a single period are, however, more likely.
Waldemar Kaczmarczyk
doaj   +1 more source

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