scholarly journals Theoretical basis and significance of the variance of discharge as a bidimensional variable for the design of lateral lines of micro-irrigation

2009 ◽  
Vol 66 (4) ◽  
pp. 563-569
Author(s):  
Euro Roberto Detomini ◽  
Brendan Power ◽  
José Antônio Frizzone
Keyword(s):  
Independent Random Variable ◽  
Theoretical Basis ◽  
Systems Design ◽  
Statistical Design ◽  
Random Variable ◽  
Point Of View ◽  
Soil Slope ◽  
Irrigation Systems ◽  
Lateral Lines ◽  
Micro Irrigation

In order to support the theoretical basis and contribute to the improvement of educational capability issues relating to irrigation systems design, this point of view presents an alternative deduction of the variance of the discharge as a bidimensional and independent random variable. Then a subsequent brief application of an existing model is applied for statistical design of laterals in micro-irrigation. The better manufacturing precision of emitters allows lengthening a lateral for a given soil slope, although this does not necessarily mean that the statistical uniformity throughout the lateral will be more homogenous.

Rheology of hydrocarbon gels

1950 ◽  
Vol 200 (1061) ◽  
pp. 183-188 ◽  
Keyword(s):  
Mechanical Properties ◽  
Experimental Measurement ◽  
Theoretical Basis ◽  
Continuous Media ◽  
Point Of View ◽  
Coarse Grained ◽  
Testing Instrument ◽  
Fine Grained ◽  
Mineral Oils ◽  
Space And Time

Hydrocarbon gels contain a number of materials, such as rubber, greases, saponified mineral oils, etc., of great interest for various engineering purposes. Specific requirements in mechanical properties have been met by producing gels in appropriately chosen patterns of constituent components of visible, colloidal, molecular and atomic sizes, ranging from coarse-grained aggregates, represented by sponges, foams, emulsions, etc.; to fine-grained and apparently homogeneous ones, represented by optically clear compounds. The engineer who has to deal with the whole range of such materials will adopt a macroscopic point of view, based on an apparent continuity of all the material structures and of the distributions in space and time of the displacements and forces occurring under mechanical actions. It has been possible to determine these distributions in the framework of a comprehensive scheme in which the fundamental principles of the mechanics of continuous media provide the theoretical basis, and a testing instrument of new design, termed Rheogoniometer, the means of experimental measurement (Weissenberg 1931, 1934, 1946, 1947, 1948).

scholarly journals Some Remarks on a Recent Paper by Borch

1961 ◽  
Vol 1 (5) ◽  
pp. 265-272 ◽  
Author(s):  
Paul Markham Kahn
Keyword(s):  
Distribution Function ◽  
Random Variable ◽  
Fixed Number ◽  
Point Of View ◽  
Optimum Amount ◽  
Measurable Transformation ◽  
The Difference ◽  
Image Position ◽  
Stop Loss ◽  
Condition B

In his recent paper, “An Attempt to Determine the Optimum Amount of Stop Loss Reinsurance”, presented to the XVIth International Congress of Actuaries, Dr. Karl Borch considers the problem of minimizing the variance of the total claims borne by the ceding insurer. Adopting this variance as a measure of risk, he considers as the most efficient reinsurance scheme that one which serves to minimize this variance. If x represents the amount of total claims with distribution function F (x), he considers a reinsurance scheme as a transformation of F (x). Attacking his problem from a different point of view, we restate and prove it for a set of transformations apparently wider than that which he allows.The process of reinsurance substitutes for the amount of total claims x a transformed value Tx as the liability of the ceding insurer, and hence a reinsurance scheme may be described by the associated transformation T of the random variable x representing the amount of total claims, rather than by a transformation of its distribution as discussed by Borch. Let us define an admissible transformation as a Lebesgue-measurable transformation T such thatwhere c is a fixed number between o and m = E (x). Condition (a) implies that the insurer will never bear an amount greater than the actual total claims. In condition (b), c represents the reinsurance premium, assumed fixed, and is equal to the expected value of the difference between the total amount of claims x and the total retained amount of claims Tx borne by the insurer.

scholarly journals Concept and Essence of the Forensic Study of Personality

2018 ◽  
pp. 186-192
Author(s):  
D. V. Isyutin-Fedotkov
Keyword(s):  
Theoretical Basis ◽  
Academic Discipline ◽  
Russian Language ◽  
Point Of View ◽  
Process Theory ◽  
Term Study ◽  
Approaches To Studying ◽  
The Subject ◽  
Definition Of ◽  
The Russian Language

The article considers and analyzes various opinions on the category "forensic study of personality". From the point of view of the Russian language, the various meanings of the term "study" fully and in a multifaceted way reflect the activities of the investigator in the study of the person in the course of sufficient disclosure and investigation of crimes. It is concluded that forensic study of personality can be considered as a process, theory (doctrine) and part of criminalistics (educational discipline, special course). In this connection, the definition of the term "forensic study of personality" depends on understanding of its essence. Forensic study of personality as a process for the study of personality is associated with activity. Forensic study of the personality as a theory (doctrine) is associated with the objective laws that constitute the subject of criminalistics. Forensic study of the personality as a section of criminalistics (academic discipline, special course) is based on a theoretical basis, on the basis of which methods, approaches to studying personality are considered. The ultimate goal of forensic study of personality is solving the problems of disclosure and investigation of crimes. Author's definitions of the term "forensic study of personality" are proposed.

scholarly journals On the Treatment of Kidney Fibrosis from the Theory of Internal Deficiency of Qi and the Coexistence of Phlegm and Blood Stasis

2021 ◽  
Vol 5 (1) ◽  
Author(s):  
Liu Min ◽  
Leng Wei
Keyword(s):  
Chinese Medicine ◽  
Traditional Chinese Medicine ◽  
Theoretical Basis ◽  
Renal Fibrosis ◽  
Blood Stasis ◽  
Point Of View ◽  
Kidney Fibrosis ◽  
Cause And Effect ◽  
Pathological Characteristics ◽  
Chinese Medicine Treatment

Traditional Chinese medicine believes that the etiology and pathogenesis of renal fibrosis are characterized by deficiency of the lung, spleen and kidney, and phlegm, blood stasis, dampness and poison. The positive and the evil can influence each other and cause and effect each other, forming the pathological characteristics of the deficiency, the deficiency, the deficiency and the reality. Chinese medicine treatment of the disease has its unique advantages, external and internal injury equal emphasis, correction and dispelling evil and regulation. From the point of view of "deficiency of qi and coexistence of phlegm and blood stasis", the treatment of renal fibrosis can provide theoretical basis for the treatment of the disease.

scholarly journals Islam and the Other: A Study on the Image of The Other in Early Muslim Societies

2021 ◽  
Vol 7 (2) ◽  
pp. 239-292
Author(s):  
Cemal Özel
Keyword(s):  
Family Life ◽  
Social Life ◽  
Theoretical Basis ◽  
Point Of View ◽  
The Other ◽  
Literary Texts ◽  
Muslim Identity ◽  
Historical Process ◽  
Science Philosophy ◽  
Over Time

In this study, the Byzantine image in the religious and literary texts produced by Muslim societies in the first four centuries of the Hijra has been examined in terms of historical process. To this end, first, a theoretical basis has been established within the framework of the concepts of identity, difference, other, and othering. Then, the imagery of Byzantium is analyzed through the interpretation of the first five verses of the Surah Rûm, with regards to naming, politics, religion, culture, science, philosophy, art and women's descriptions. The main argument of the study is that the Byzantine image of Muslims cannot be addressed independent of the relationships established with Byzantium. From a historical point of view, it is seen that the image of Byzantium, which was initially positive, turned into negative depending on the course of relations and was balanced over time in terms of change, while the style and content of political and political imagery varied, there is very little variation in descriptions of social life with regards to Constantinople, Byzantine craftsmanship, family life and women. While the Qur'an and the Sunnah culture formed the basis of the Byzantine perception in the early days, political developments became dominant over time. On the other hand, Muslims did not deal with Byzantium in a monolithic, shallow and reductive way, but they used the distinction between “us” and “them” to improve the image of Islam and reinforce Muslim identity.

scholarly journals Prototyping Revisited: - design with users in a cooperative setting

1987 ◽  
Vol 16 (233) ◽  
Author(s):  
Susanne Bødker
Keyword(s):  
Design Process ◽  
Systems Design ◽  
User Participation ◽  
Point Of View ◽  
Computer Application ◽  
Mutual Learning ◽  
Active User ◽  
Hands On ◽  
Paper Prototyping

In this paper, prototyping will be discussed from the point-of-view of user/designer cooperation in design. Active user participation in systems design is a way of improving the quality of the design process as well as the product - a computer application in use. To participate actively in design, users must be allowed to experience the future use situation in the design process. Various prototyping methods seem to offer valuable help in this process. Cooperation between users and designers, the mutual learning process, and hands-on experiences to reveal the triggering of proper operations is, however, only one side of the epistemological interests behind prototyping. At the same time, the practical solutions of different approaches are to some extent applicable but it is perhaps a good idea to reconsider the concept from the perspective of cooperation between users and professional designers.

Sustainable urban land use: Definition, theoretical basis and review of morphology aspect concepts

2009 ◽  
Vol 1 (2) ◽  
pp. 153-170
Author(s):  
Ranka Gajić
Keyword(s):  
Land Use ◽  
Theoretical Basis ◽  
Urban Land ◽  
Urban Land Use ◽  
Point Of View ◽  
Theory And Practice ◽  
Urban Planner ◽  
Starting Point ◽  
Definition Of ◽  
Spatial Entities

The topic of sustainable urban land use compared to the world theory and practice has almost not been elaborated by the professionals in Serbia. This paper's starting point is that it is important to analyze and apply this topic, not only for the master plan level but also for the more detailed levels of planning and for smaller spatial entities/complexes in the cities, focusing on the morphological implications of sustainable urban land use as the topic relevant from the architect/urban planner point of view. After the definition of the notion of sustainable urban land use and the theoretical basis has been defined in the introductory explications, followed by a brief review of that topic's presence in Serbia, the point of view has been explained - namely, focusing on one single aspect (morphology) followed by a review of relevant criteria of other aspects of sustainable urban land use (economical, ecological and social aspects). The conclusion derived by synthesis represents the recommendation for a possible practice/methodology for planner's approach to the sustainable urban land use from the viewpoint of the morphology aspect.

Reframing Information System Design as Learning Across Communities of Practice

2009 ◽  
pp. 2052-2070
Author(s):  
Kevin Gallagher ◽  
Robert M. Mason
Keyword(s):  
Knowledge Transfer ◽  
Communities Of Practice ◽  
Theoretical Basis ◽  
Systems Design ◽  
Past Research ◽  
Three Dimensions ◽  
Information System Design ◽  
Requirements Definition ◽  
Practical Guidance ◽  
Definition Phase

This article frames the requirements definition phase of systems design as a problem of knowledge transfer and learning between two communities of practice: IS designers and system users. The theoretical basis for the proposed approach is Wenger’s (1998) framework for social learning, which involves three dimensions: alignment, imagination, and engagement. The article treats the requirements definition task in systems design as a set of activities involving mutual learning and knowledge transfer between two communities of practice (CoP) along these three dimensions. In taking this approach, the article maps the results of past research on the systems design process onto this CoP framework and illustrates that the proposed framework encompasses the same activities used by traditional methods of requirements definition. However, this approach focuses attention on the learning that must take place between the two CoPs and thereby helps resolve some of the inherent shortcomings of prior efforts and approaches. The framework provides both a more encompassing conceptual lens for research on improving the requirements definition task and practical guidance for managers who are charged with a systems design project.

Scandinavian Design: On Participation and Skill

1993 ◽  
Author(s):  
Pelle Ehn
Keyword(s):  
Product Quality ◽  
Trade Unions ◽  
Participatory Design ◽  
Systems Design ◽  
The United States ◽  
User Participation ◽  
Point Of View ◽  
Controversial Issue ◽  
Design Strategies ◽  
And Control

In Scandinavia we have for two decades been concerned with participation and skill in the design and use of computer-based systems. Collaboration between researchers and trade unions on this theme, starting with the pioneering work of Kristen Nygaard and the Norwegian Metal Workers’ Union, and including leading projects like DEMOS and UTOPIA, has been based on a strong commitment to the idea of industrial democracy. This kind of politically significant, interdisciplinary, and action-oriented research on resources and control in the processes of design and use has contributed to what is often viewed abroad as a distinctively Scandinavian approach to systems design. This Scandinavian approach might be called a work-oriented design approach. Democratic participation and skill enhancement, and not only productivity and product quality, are themselves considered objective of design. [Based on the two research projects, DEMOS and UTOPIA, I have elaborated this approach in detail in Work-Oriented Design of Computer Artifacts (1989). This paper is based on that work.] Two important features of participatory design shape its trajectory as a design strategy. The political one is obvious. Participatory design raises questions of democracy, power, and control in the workplace. In this sense it is a deeply controversial issue, especially from a management point of view. The other major feature is technical—its promise that the participation of skilled users in the design process can contribute importantly to successful design and high-quality products. Some experiences, perhaps most developed in Scandinavia, support this prediction and contribute to the growing interest in participatory design in the United States and other countries; by contrast, “expert” design strategies have too often turned out to be failures in terms of the usability of the resulting systems. These two features together suggest that there should be a strong link between the skill and product quality aspect of user participation and the democracy and control aspect, or else participatory design will be a deeply controversial issue from the point of view of the employees and trade unions. The trade-union-oriented democracy aspect of skill and participation in design is discussed in the first part of the chapter.

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