Classification of Project Management Mathematical Models

Author(s):  
������� ◽  
Igor Tsarkov

Mathematical models in Project Management became one of the key elements that in the 50th of the past century had formed a new branch of science � Project management. Since then there have been developed a large number of mathematical models adapted for solving partial problems. Unfortunately no universal practical models, which allow managing projects in conditions of resource or budget restriction, have been invented. Therefore the classification of different mathematical models is the pressing problem which could bring to order all these models from the one hand and reveal the most perspective directions of further research. In this paper existing classifications are analyzed and a new classification is proposed.

2020 ◽  
Vol 36 (4) ◽  
pp. 249-255 ◽  
Author(s):  
Carlos Walter Sobrado Júnior ◽  
Carlos de Almeida Obregon ◽  
Afonso Henrique da Silva e Sousa Júnior ◽  
Lucas Faraco Sobrado ◽  
Sérgio Carlos Nahas ◽  
...  

Purpose: Present an updated classification for symptomatic hemorrhoids, which not only guides the treatment of internal hemorrhoids but also the treatment of external components. In addition, this new classification includes new treatment alternatives created over the last few years.Methods: Throughout the past 7 years, the authors developed a method to classify patients with symptomatic hemorrhoids. This study, besides presenting this classification proposal, also retrospectively analyzed 149 consecutive patients treated between March 2011 and November 2013 and aimed to evaluate the association between the management adopted with Goligher classification and our proposed BPRST classification.Results: Both classifications had a statistically significant association with the adopted management strategies. However, the BPRST classification tended to have fewer management discrepancies when each stage of disease was individually analyzed.Conclusion: Although there is much disagreement about how the classification of hemorrhoidal disease should be updated, it is accepted that some kind of revision is needed. The BPRST method showed a strong association with the management that should be adopted for each stage of the disease. Further studies are needed for its validation, but the current results are encouraging.


Author(s):  
Vanessa Lopes Lourenço Hanes

Given the massive changes that Brazil has undergone in the past century, particularly in distancing itself linguistically from its former colonizer, this study is an attempt to determine the role of translation in the country's cultural evolution. Translational approaches have developed along opposing poles: on the one hand, a strong resistance to incorporating orally-driven alterations in the written language, while on the other, a slow, halting movement toward convergence of the two, and both approaches are charged with political and ideological intentionality. Publishing houses, editors and translators are gatekeepers and agents whose activities provide a glimpse into the mechanism of national linguistic identity, either contributing to or resisting the myth of a homogenized Portuguese language.


2009 ◽  
Vol 17 (1) ◽  
pp. 146-175 ◽  
Author(s):  
Monika Bednarek

In the past two decades or so, a number of researchers from various fields within linguistics have turned their attention to interpersonal phenomena, such as the linguistic expression of speaker opinion or evaluation (also called stance or appraisal), or the encoding of subjectivity in language and its diachronic development (subjectification/subjectivization). Many linguists have offered categorizations of evaluative meaning, based on authentic discourse data, but no connection has been made with cognitive approaches to appraisal processes. This paper offers a first meta-theoretical exploration of such issues. It compares dimensions of evaluation that have been identified in linguistic and cognitive studies, and also examines how psychological research into basic emotions can be related to linguistic research on affect. On the basis of these comparisons a proposal for a new classification of evaluative meanings is made. The focus of this paper is on only one aspect of the highly complex phenomenon of evaluation, namely potential evaluative dimensions, although other relevant issues will also be touched upon, including the pragmatics of evaluation (evaluation and context).


2016 ◽  
Vol 30 (3) ◽  
pp. 187 ◽  
Author(s):  
Marcel G. Hermes ◽  
Letícia A. de Oliveira

The generic classification of Neotropical Eumeninae has been termed chaotic, and synonymisation of taxa has become constant in recent years. Recognition of some generic limits are problematic due to features showing a great deal of variation, such as the length of the first metasomal tergum. This applies to the Neotropical Alphamenes van der Vecht, Minixi Giordani Soika and Pachyminixi Giordani Soika. Minixi has already been demonstrated to be paraphyletic in regards to Pachyminixi. These taxa are the focus of the present study, which used morphological data to infer the phylogenetic relationships among their constituent species. A total of 14 taxa and 34 characters were subjected to cladistic analysis under implied weighting. A single most-parsimonious cladogram was obtained, recovering Pachyminixi as monophyletic. Minixi, however, was paraphyletic relative to Pachyminixi and they are thus synonymised, with the former name having priority. A new species from Mexico, Minixi mariachii, sp. nov., is described. Minixi joergenseni bicingulatus (Zavattari, 1912) is synonymised under M. joergenseni (Schrottky, 1909), comb. nov. Additional new combinations are: Minixi arechavaletae (Brèthes, 1903), comb. nov., M. bifasciatum (von Schulthess, 1904), comb. nov., M. brethesi (Bertoni, 1927), comb. nov., M. sumichrasti (de Saussure, 1875), comb. nov., and M. uruguyense (de Saussure, 1855), comb. nov. Illustrations and a new key to species of Minixi are provided. The present study enhances our knowledge on Neotropical potter wasp systematics, providing one further step into a natural classification for a group whose taxonomy has suffered from irrational splitting of genera in the past century.


2006 ◽  
Vol 3 (3) ◽  
pp. 495-521 ◽  
Author(s):  
JAMES T. KLOPPENBERG

In December of 1850, exhausted by his role in French politics and recuperating from tuberculosis, Alexis de Tocqueville retreated to the Amalfi coast to think, write, and recover. To his best friend Louis de Kergolay, Tocqueville wrote about completing his memoir on the 1848 revolution and his plans to undertake a comprehensive account of French history that would explain the turmoil of the past century. The appeal was powerful, he explained to Kergolay, but “the difficulties are immense. The one that most troubles my mind comes from the mixture of history properly so called with historical philosophy. I still do not see how to mix these two things,” he conceded, “and yet, they must be mixed, for one could say that the first is the canvas and the second the color, and that it is necessary to have both at the same time in order to do the picture.” Tocqueville feared “that the one is harmful to the other, and that I lack the infinite art that would be necessary in order to choose properly the facts that must, so to speak, support the ideas.


Author(s):  
Benita Stavre ◽  
Erinda Papa

During the early twentieth century, Albania was visited by various British and American people who were eager to know about the curious features of this little country’s particular life. They had heard of it in their homeland and chose to trace a reality that was much different from the one they were used to. The materials they wrote and published, constitute a reliable source of information, whose analysis from the modern perception draws a picture of the life almost a century ago. This paper aims to describe the particular context of the relation that Albanian people had created with God and the way the religious life was shaped through the traditional rituals of the country. A few of the arguments that will be analyzed are: the way the religious faith was integrated in the daily activities, the religious tolerance in the state policies and the way it was reflected in the life context, religious attitudes due to the historical development of the past centuries, the influence of the new entries of the ‘30s, the restricted intercourse of the northern Albanians due to their geographical isolation and the pagan rituals and symbols of the traditional ceremonies. The Albanian way of worshiping seems to have been shaped by life pragmatism, social equilibrium and personal honesty. Nothing can describe it better than the people who lived with it for some time and were able to define it from a different mental perception. The description may supply modern insight of the particular attitude that this country reflected in early in the past century.


2017 ◽  
Vol 1 (1) ◽  
pp. 2514183X1771411
Author(s):  
Maurice Campagna

In terms of fundamental, universal scientific progress in the area of “hard sciences,” the past century was the one of relativity, quantum mechanics, and solid state/surface physics, whereas the 21st century prospects a focus on genomics/life/brain sciences, computer sciences/artificial intelligence, climate, and extraplanetary research. Among these, neurosciences represent a meta-plane, where new tools and insights provide key contributions to revolutionizing our current understandings. Increasingly, we move toward a quantitative description of various neural phenomena as well as to a new understanding of the nervous system and brain organization/functioning in particular. All this is strongly influencing the way we see the world. From this process, finally yet importantly, we derive large benefits for the cure of diseases as well as the management of an aging society.


CFD Letters ◽  
2021 ◽  
Vol 13 (12) ◽  
pp. 133-149
Author(s):  
Hidayatullah Mohammad Ali ◽  
Azmin Shakrine Mohd Rafie ◽  
Syaril Azrad Md Ali ◽  
Ezanee Gires

The Magnus effect and its evolution have greatly affected the aerospace industry over the past century to date. Nevertheless, cylinder embedment onto a flat plate offers a new discovery that is yet to be investigated, specifically whether the concept could enhance the aerodynamic properties of the flat plate following the Magnus effect momentum injection. Over the past decade, the use of a rotating cylinder on an aerofoil has existed from past researches studies where the embedment has significantly increased in its aerodynamic performance better than the one without Magnus application. However, it would be hard to achieve experimental-wise as an accurate measurement and fabrication would be needed to have the same resulting effects. Here, most of the researchers would not focus deeply on the placement of the cylinder as this may increase their fabrication and testing complications. Therefore, the current study delineates the use of flat plate as the foundation design to encounter the arise matter by reducing its complication yet easy to manufacture experimentally. In this work, the model output was evaluated by using ANSYS WORKBENCH 2019 software to simulate two-dimensional flow analysis for the rotational velocities of 500 RPM and 1000 RPM, respectively. This was done for different Reynolds numbers ranging from 4.56E+05 to 2.74E+06 which implicitly implied with free stream velocities varying from 5 m/s to 30 m/s for different angles of attack between 0 to 20 degrees. Prior to developing the best model embedment, the mesh independency test was validated with an error of less than 1%. The study resulted in a remarkable trend that was noticeably up to 32% (500 RPM) and 76% (1000 RPM) better in compared to the one without momentum injection. Similarly, the high recovery led to a tremendously lower of 51% (500 RPM) and 99% (1000 RPM), respectively. In sum, these findings generated a stall angle delay of up to 26% (500 RPM) and 78% (1000 RPM) accordingly.


2021 ◽  
Vol XII (2) ◽  
pp. 142-196
Author(s):  
V. V. Chirkovsky
Keyword(s):  
The Past ◽  
To Come ◽  

Any researcher on the question of the innervation of the movements of the iris is involuntarily amazed, on the one hand, by the amazing abundance of works on this branch of physiology and, at the same time, solid works, produced by outstanding scientists, and on the other, not less than the amazing diversity of the prevailing views, even prevailing in the foundations of the study of pupillary movements. The last ten years of the past century have been the period of especially lively debates in literature on the most significant issues of this department and, it seems, will not be exaggerated, if we say that not one side of the question about the innervations of the movements of the pupil has not been left again. But from the review of these numerous works, it is difficult to come to no less than a definite, immutable conclusion on any issue.


2015 ◽  
Vol 34 (3) ◽  
pp. 249-259 ◽  
Author(s):  
Ivana Haladová ◽  
František Petrovič

Abstract This paper deals with the new classification of land use changes. We chose Nitra town in Slovakia as a model area. We examined changes of land use for the period 2003-2013. The main result of this work is a table for types of land use changes and a map that shows the location of these changes in Nitra town. Nitra is constantly expanding its area and it is also significantly changing within its borders. Agriculturally used surroundings of the town are being transformed into build-up areas and industrial parks. This transformation causes a loss of agricultural land and vegetation, in general. Agriculture in this region has been gradually declining and disappearing in the past years. On the other side, urbanisation, technicisation and industrialisation are highly supported


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