Constraints to the modelling of diet selection and intake in the grazing ruminant

1996 ◽  
Vol 47 (2) ◽  
pp. 257 ◽  
Author(s):  
H Dove

The interaction of grazing animals and their pasture generates substantial income for Australia, so that an interest in modelling the processes involved can be justified readily. Based on a brief review of the factors influencing diet selection, it is suggested that, from the point of view of modelling the process, a major constraint has been the availability of accurate and convenient methods for estimating the botanical composition of the consumed diet. It is also suggested that there is a need in future work to define more adequately the available herbage in botanical, physical, chemical and spatial terms, and to conduct experiments in which factors influencing selection are examined in an unconfounded way. It is further suggested that, while the idea of fixed preference or selection coefficients for particular species is attractive from a modelling standpoint, available evidence does not support the concept. Factors influencing herbage intake are then discussed, particularly in relation to the interaction between the degree of rumen fill and the animal's capacity to use energy. The manner in which this interaction has been used in the modelling of intake is then described briefly and the modeling of diet selection and intake within the decision-support system GrazFeed is presented by way of example. Finally, the constraints associated with model validation are discussed briefly, especially in relation to the need in future work to define more adequately the characteristics of the pasture on offer.

2020 ◽  
Vol 24 (4) ◽  
pp. 237-250 ◽  
Author(s):  
Joana S. R. Correia ◽  
Fernando A. F. Ferreira ◽  
Ieva Meidutė-Kavaliauskienė ◽  
Leandro F. Pereira Pereira ◽  
Constantin Zopounidis ◽  
...  

The increasing concentration of populations in urban areas in recent decades has strengthened the interest in – and the importance given to – these zones. Cities have become quite attractive from investors’ point of view because of the wide array of opportunities and growing need for investment in urban areas. Thus, city strategic planning quite often requires an understanding of the determinants that attract investment to urban zones. This study sought to identify the factors that strengthen urban investment based on the knowledge of a panel of experts. Fuzzy cognitive mapping techniques were applied to understand the concepts and decision criteria included in the decision-support model and their cause-and-effect relationships. The results provide insights into which determinants most strongly influence urban investment, namely, infrastructure, supporting services, and political-administrative factors. Diverse scenarios at the intra- and inter-cluster levels were created to clarify the impacts of variable changes on the model developed. The findings were validated by both the expert panel members and the vice-president of the Portuguese Association of Real Estate Developers and Investors. Advantages and limitations of the proposed framework are presented, as well as recommendations for future research.


Author(s):  
А. Karam

In the article it is revealed the essence of interpretation of the phenomenon of «aesthetic competence» from the point of view of philosophy, psychology, pedagogy, sociology, and cultural studies. Emphasis is placed on the interconnection of synonymous terms «readiness» and «preparedness»: «readiness» is a concept broader than competence and preparedness, which may be single, fragmented, that is, not to provide the full capacity to perform the functions of an activity. The essence of the outlined phenomenon is analyzed through its separate concepts, taking into account their relation: «aesthetic competence» with the concepts «competence», aesthetics «. Artistic and aesthetic competence is defined as a system of internal means of regulation of artistic and aesthetic actions, which includes artistic and aesthetic knowledge, social guidelines, skills and experience, aesthetic orientation, based on knowledge and sensory experience, free possession of artistic and aesthetic means and perception of artistic and aesthetic situation. The essence and features of aesthetic competence are revealed. The modern approaches to defining the concept of «aesthetic competence» are highlighted. The components of aesthetic competence are revealed. Specific features and factors influencing the development of aesthetic competence are highlighted. In conclusion, it is noted that the concept under study, aesthetic competence, should be differentiated into such varieties as aesthetic and artistic competence, while each of them, for a particular artistic profession, will at the same time have a general and specific meaning.


1970 ◽  
Vol 1 (3) ◽  
pp. 181-205 ◽  
Author(s):  
ERIK ERIKSSON

The term “stochastic hydrology” implies a statistical approach to hydrologic problems as opposed to classic hydrology which can be considered deterministic in its approach. During the International Hydrology Symposium, held 6-8 September 1967 at Fort Collins, a number of hydrology papers were presented consisting to a large extent of studies on long records of hydrological elements such as river run-off, these being treated as time series in the statistical sense. This approach is, no doubt, of importance for future work especially in relation to prediction problems, and there seems to be no fundamental difficulty for introducing the stochastic concepts into various hydrologic models. There is, however, some developmental work required – not to speak of educational in respect to hydrologists – before the full benefit of the technique is obtained. The present paper is to some extent an exercise in the statistical study of hydrological time series – far from complete – and to some extent an effort to interpret certain features of such time series from a physical point of view. The material used is 30 years of groundwater level observations in an esker south of Uppsala, the observations being discussed recently by Hallgren & Sands-borg (1968).


2021 ◽  
Vol 3 (1) ◽  
pp. 92
Author(s):  
Refika Mastanora ◽  
Rudi Pranata ◽  
Oktri Permata Lani

Social attribution can appear spontaneously or through long considerations and thinking process. Factors influencing attribution is the attribution style; planned and unplanned attribution. This kind of behavior can arise due to emotional factors. Meanwhile, children's social attributions arise because of stereotypes or labeling that have been attached to society, thus it has an impact on children's understanding of gender since they were born. The existence of social construction regarding gender roles cannot be separated from how the paradigm views the labeling of the characteristics of women and men is. In children, this social attribution usually occurs because of the stereotype of gender roles taught to children. This stereotype is a labeling that begins based on the perception or point of view of a person. While gender role stereotypes are part of the discussion about gender "sex", namely social expectations that define how men and women think, feel, and act, which are part of the product of the stereotype itself.


2021 ◽  
Vol 03 (01) ◽  
pp. 40-46
Author(s):  
Hasil Cəmil oğlu Bağırov ◽  
◽  
Vüqar İmanəli oğlu Cəfərov ◽  
Arzu Vidadi qızı Həşimova ◽  
Rəşidə Elşən qızı Şükürova ◽  
...  

Without knowing the main quality indicators of agricultural products, it is impossible to draw conclusions about the effectiveness of this or that agro-technical measure. One of the factors influencing the quality of sugar beet and watermelon is the effective application of fertilizers. Fertilizers increase the quality indicators of the product along with its expansion. From this point of view, the effect of organic and mineral fertilizers on the quality indicators of sugar beet and watermelon product in the meadow-gray soils of Mugan-Salyan region was studied. The combined application of organic and mineral fertilizers had a positive effect on the quality indicators of sugar beet and watermelon. Key words: organic and mineral fertilizers, sugar beet, watermelon, phosphorus, potassium, productivity, soil, quality


Author(s):  
B. K. Tripathy

Several models have been introduced to capture impreciseness in data. Fuzzy sets introduced by Zadeh and Rough sets introduced by Pawlak are two of the most popular such models. In addition, the notion of intuitionistic fuzzy sets introduced by Atanassov and the hybrid models obtained thereof have been very fruitful from the application point of view. The introduction of fuzzy logic and the approximate reasoning obtained through it are more realistic as they are closer to human reasoning. Equality of sets in crisp mathematics is too restricted from the application point of view. Therefore, extending these concepts, three types of approximate equalities were introduced by Novotny and Pawlak using rough sets. These notions were found to be restrictive in the sense that they again boil down to equality of sets and also the lower approximate equality is artificial. Keeping these points in view, three other types of approximate equalities were introduced by Tripathy in several papers. These approximate equalities were further generalised to cover the approximate equalities of fuzzy sets and intuitionistic fuzzy sets by him. In addition, considering the generalisations of basic rough sets like the covering-based rough sets and multigranular rough sets, the study has been carried out further. In this chapter, the authors provide a comprehensive study of all these forms of approximate equalities and illustrate their applicability through several examples. In addition, they provide some problems for future work.


Author(s):  
Ming-Chien Shan

This paper highlights all the relevant issues and required features from a business operation point of view. It presents an overall intelligent business operation scenario to highlight the required tasks and relevant issues to meet the needs of business managers and business operators. It then outlines the approaches and design to deal with these issues and provides the needed functionality. Finally, it summarizes the study and discusses future work.


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