Crystal growth by oriented attachment: kinetic models and control factors

CrystEngComm ◽  
2014 ◽  
Vol 16 (8) ◽  
pp. 1419 ◽  
Author(s):  
Xiaogang Xue ◽  
R. Lee Penn ◽  
Edson Roberto Leite ◽  
Feng Huang ◽  
Zhang Lin
Keyword(s):  
Crystal Growth ◽  
Kinetic Models ◽  
Oriented Attachment ◽  
Control Factors ◽  
And Control

MODEL OF SOCIAL POTENTIAL OF CHILDHOOD IN THE RUSSIAN REGIONS: THE RESULTS OF EXPERIMENTS

2019 ◽  
pp. 152-162
Author(s):  
A.G. Filipova ◽  
A.V. Vysotskaya
Keyword(s):  
Third Wave ◽  
Russian Regions ◽  
The Third ◽  
Control Factors ◽  
Social Potential ◽  
System Input ◽  
Optimal Values ◽  
Fixed Ideal ◽  
And Control ◽  
Selection Of

The article presents the results of mathematical experiments with the system «Social potential of childhood in the Russian regions». In the structure of system divided into three subsystems – the «Reproduction of children in the region», «Children’s health» and «Education of children», for each defined its target factor (output parameter). The groups of infrastructure factors (education, health, culture and sport, transport), socio-economic, territorial-settlement, demographic and en-vironmental factors are designated as the factors that control the system (input parameters). The aim of the study is to build a model îf «Social potential of childhood in the Russian regions», as well as to conduct experiments to find the optimal ratio of the values of target and control factors. Three waves of experiments were conducted. The first wave is related to the analysis of the dynam-ics of indicators for 6 years. The second – with the selection of optimal values of control factors at fixed ideal values of target factors. The third wave allowed us to calculate the values of the target factors based on the selected optimal values of the control factors of the previous wave.

Protein synthesis is required for rapid degradation of tubulin mRNA and other deflagellation-induced RNAs in Chlamydomonas reinhardi

1986 ◽  
Vol 6 (1) ◽  
pp. 54-61
Author(s):  
E J Baker ◽  
L R Keller ◽  
J A Schloss ◽  
J L Rosenbaum
Keyword(s):  
Protein Synthesis ◽  
Transcriptional Control ◽  
Protein S ◽  
Protein Synthesis Inhibitors ◽  
Control Factors ◽  
Flagellar Proteins ◽  
The Stability ◽  
And Control

After flagellar detachment in Chlamydomonas reinhardi, there is a rapid synthesis and accumulation of mRNAs for tubulin and other flagellar proteins. Maximum levels of these mRNAs (flagellar RNAs) are reached within 1 h after deflagellation, after which they are rapidly degraded to their predeflagellation levels. The degradation of alpha- and beta-tubulin RNAs was shown to be due to the shortening of their half-lives after accumulation (Baker et al., J. Cell Biol. 99:2074-2081, 1984). Deflagellation in the presence of protein synthesis inhibitors results in the accumulation of tubulin and other flagellar mRNAs by kinetics similar to those of controls. However, unlike controls, in which the accumulated mRNAs are rapidly degraded, these mRNAs are stabilized in cycloheximide. The stabilization by cycloheximide is specific for the flagellar mRNAs accumulated after deflagellation, since there is no change in the levels of flagellar mRNAs in nondeflagellated (uninduced) cells in the presence of cycloheximide. The kinetics of flagellar mRNA synthesis after deflagellation are shown to be the same in cycloheximide-treated and control cells by in vivo labeling and in vitro nuclear runoff experiments. These results show that protein synthesis is not required for the induced synthesis of flagellar mRNAs, and that all necessary transcriptional control factors are present in the cell before deflagellation, but that protein synthesis is required for the accelerated degradation of the accumulated flagellar mRNAs. Since cycloheximide prevents the induced synthesis and accumulation of flagellar proteins, it is possible that the product(s) of protein synthesis required for the accelerated decay of these mRNAs is a flagellar protein(s). The possibility that one or more flagellar proteins autoregulate the stability of the flagellar mRNAs is discussed.

Wheat Straw Decomposition Patterns and Control Factors Under Nitrogen Fertilization

2021 ◽  
Author(s):  
Jin Liu ◽  
Yangquanwei Zhong ◽  
Xiaoyu Jia ◽  
Weiming Yan ◽  
Jia Cao ◽  
...  
Keyword(s):  
Wheat Straw ◽  
Nitrogen Fertilization ◽  
Straw Decomposition ◽  
Control Factors ◽  
And Control

Preferences, Utility Function, and Control Design of Complex Cultivation Process

2013 ◽  
pp. 174-198
Keyword(s):  
Optimal Control ◽  
Utility Function ◽  
Kinetic Models ◽  
Control Design ◽  
Monod Kinetics ◽  
Cultivation Process ◽  
Monod Kinetic ◽  
And Control

In the control design are overcome restrictions connected with the observability of the Monod kinetics and with the singularities of the optimal control of Monod kinetic models.

scholarly journals Cooling effect and control factors of common shrubs on the urban heat island effect in a southern city in China

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Rongfei Zhang
Keyword(s):  
Surface Temperature ◽  
Southern China ◽  
Cooling Effect ◽  
Heat Island ◽  
Urban Green ◽  
Maximum Surface ◽  
Control Factors ◽  
Island Effect ◽  
Murraya Exotica ◽  
And Control

Abstract Because the heat island effect can make cities warmer than their surroundings, it can make urban dwellers uncomfortable and even affect their health, which is particularly pronounced in developed cities in southern China. To reduce the heat island effect and improve the environment, various types of vegetation have been planted in the urban green belt. Though previous studies have been conducted on the beauty, air purification functions and cooling effect of vegetation, little is concentrated on the different cooling effects and control factors of various common shrubs on the heat island effect in cities. In this study, five of the most regionally common shrubs were selected to study the cooling effect in Guangzhou, southern China. The maximum surface temperatures of five shrubs and pavement were compared using infrared temperature sensors from April 1st 2019 to October 31st 2019. Results show that (1) All five shrubs showed noticeable seasonal variation, and the average surface temperatures of the five shrubs were between 38.0 and 42.2 °C during May–August and 30.7–34.1 °C during the other seasons (April, September and October);. (2) Murraya exotica L. exhibited the best cooling effect on the maximum surface temperature. Its value was 44.7 °C, and the absolute difference values of Murraya exotica L. (10.3 ± 1.7 °C) were higher than any other shrub during the study period; (3) Both the LAI (R2 = 0.57, p < 0.01) and plant height (R2 = 0.13, p < 0.01) are control factors of the cooling effect on vegetation surface temperature for the five shrubs. This study revealed the differences in the cooling effect and influencing factors of five regionally common shrubs on the heat island effect. Research on the functional characteristics of plants and plant selection in urban green belts has both theoretical and practical significance.

scholarly journals Young people and sun safety: the role of attitudes, norms and control factors

2008 ◽  
Vol 19 (1) ◽  
pp. 45-45 ◽  
Author(s):  
Natalie G. Robinson ◽  
Katherine M. White ◽  
Ross McD. Young ◽  
Peter J. Anderson ◽  
Melissa K. Hyde ◽  
...  
Keyword(s):  
Young People ◽  
Sun Safety ◽  
Control Factors ◽  
And Control

scholarly journals Distribution of potential geological hazards and control factors in Qingdao offshore, China

China Geology ◽  
2019 ◽  
Vol 2 (1) ◽  
pp. 40-48
Author(s):  
Ze Ning ◽  
◽  
Man-man Lin ◽  
Yong Zhang ◽  
Xiao-bo Zhang ◽  
...  
Keyword(s):  
Geological Hazards ◽  
Control Factors ◽  
And Control

Key Issues Influencing the Performance of Near-Field Barriers

1992 ◽  
Vol 294 ◽  
Author(s):  
P.W. Tasker ◽  
S.J. Wisbey ◽  
C.B. Boyle
Keyword(s):  
Near Field ◽  
Performance Assessments ◽  
Gas Generation ◽  
Human Environment ◽  
Factors Affecting ◽  
Control Factors ◽  
Natural Analogues ◽  
Physical Barriers ◽  
Key Issues ◽  
And Control

ABSTRACTIn developing a national strategy for the disposal of radioactive wastes, each country will consider isolation options that are appropriate to the types of waste that are produced. The options are developed in response to specific national regulatory requirements, and thus will focus on different aspects of performance. However, there are a number of technical concerns that are common to all programmes. The major issues concerning the behaviour of the chemical and physical barriers in the near field of a radioactive waste repository are discussed in this paper.The description of key issues has been divided into the following categories: barrier design, barrier evolution, scientific understanding through modelling, and validation of performance. The near-field barriers are selected and designed to provide appropriate radionuclide containment and control. Factors affecting the evolution of these barriers, such as container degradation and gas generation, determine the subsequent release of radionuclides to the human environment. Modelling repository evolution is therefore an integral feature of performance assessments, and issues such as the treatment of inhomogeneities and non-equilibrium chemistry may need to be addressed. However, the use of mathematical and computer models implies a requirement for validation. The use of demonstration experiments and natural analogues builds confidence in the predictions of repository performance models, and provides a degree of validation for otherwise inaccessible timescales.

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