scholarly journals NONUNIFORM COURSE OF ACUTE PERIOD OF HEMORRHAGIC STROKE: ANALYSIS USING METHODS OF MULTIVARIATE STATISTICS

2021 ◽  
Vol 9 (1) ◽  
pp. 59-67
Author(s):  
I.S. Kurepina ◽  
◽  
R.A. Zorin ◽  
V.A. Zhadnov ◽  
O.A. Sorokin ◽  
...  
Keyword(s):  
Hemorrhagic Stroke ◽  
Dimensional Space ◽  
Expert Assessment ◽  
Multivariate Statistical ◽  
Acute Period ◽  
Canonical Correlations ◽  
Satisfactory Condition ◽  
Selection Of Variables ◽  
Expert Assessments ◽  
Selection Of

Background. Hemorrhagic stroke is an important medical and social problem both in the world and in the Russian Federation due to high parameters of morbidity, mortality and disability. Aim. To compare expert assessments and formalized multivariate statistical procedures in analysis of clinical inhomogeneity of patients with intracranial hematoma of supratentorial location. Materials and Methods. 75 Patients who took treatment in the neurovascular department of Ryazan Regional Clinical Hospital with the diagnosis of hemorrhagic stroke, were examined. Of them, there were 40 men and 35 women with the mean age 68.1 years. Results. Primarily, on the basis of expert assessments, the patients were divided to 2 groups: with unfavorable course and with relatively favorable course – satisfactory condition, regress of symptoms, recovery of the level of consciousness. In the first stage, in result of the primary expert assessment, the patients were divided to subgroups with favorable and unfavorable course. After that, significant for selection of groups variables were used in selection of clusters: method of hierarchial tree for determination of the number of groups; k-means method for identification of their elements. Discrimination analysis was used for selection of variables in NIHSS and GCS, and also for assessment of canonical correlations. After that, cluster analysis of NIHSS and GCS dynamics was conducted on the 1st, 3rd, 21st day for selection of groups in high-dimensional space of signs with exclusion of subjective expert assessments. Three main groups of patients were selected. In the second stage, in accordance with the number of groups, patients belonging to the corresponding clusters were identified using the k-means method. Cluster 1 included patients with a poor prognosis, clusters 2 and 3 suggested a more favorable course of the acute period with worse parameters in cluster 2. Conclusions. Use of discriminant functions confirms the role of severity of depression of consciousness and of the volume of hematoma in the unfavorable course.

scholarly journals A comparison of demographic behaviour between the CR regions using multivariate statistical methods

2008 ◽  
Vol 56 (6) ◽  
pp. 103-112
Author(s):  
Marie Prášilová ◽  
Jan Grosz ◽  
Pavla Hošková
Keyword(s):  
Human Reproduction ◽  
Agglomerative Clustering ◽  
Biological Structure ◽  
Multivariate Statistical Methods ◽  
Multivariate Statistical ◽  
Selection Of Variables ◽  
Solution Selection ◽  
And Migration ◽  
Demographic Behaviour ◽  
Selection Of

The inhabitants of separate CR regions show varying demographic behaviour that presents itself in the demographic measures´ values. The paper offers a comparison of the development of selected measures of size and movement of the population in the regions of CR in 1993 and 2006 years. Attention is paid to the changes in measures of economic and biological structure, life expectancy and some of the measures of human reproduction, patterns of growth and migration. Multivariate analysis methods have been employed for the solution. Selection of variables has been carried out in each year using factor analysis and similarity of the regions has been described by the hierarchic agglomerative clustering method. During the thirteen years, changes occurred in demographic behaviour of the regions. Currently the Capital Prague and the Středočeský Region differ significantly. All the regions remaining have been stabilized as concerns the demographic measures and they show homogeneity.

scholarly journals Expert assessment method in foresight studies

2019 ◽  
Vol 16 (4) ◽  
pp. 4-13
Author(s):  
O. I. Karasev ◽  
E. I. Mukanina
Keyword(s):  
Delphi Method ◽  
Research Work ◽  
Assessment Method ◽  
Theoretical Research ◽  
Expert Assessment ◽  
Advantages And Disadvantages ◽  
Expert Model ◽  
Expert Assessments ◽  
Necessary And Sufficient ◽  
Selection Of

Purpose of the study. The main goal of this research is to identify key aspects of expert assessments and offer high-quality recommendations for their improvement.Materials and methods. Foresight is built on the basis of expert assessment method, includes: active formation of the image of the future instead of its probabilistic prediction, focus on identifying key development priorities, participation in the study of key stakeholders, the relationship with the management decision-making process. The methods of analysis used in the work suggest methods of theoretical research in the form of analysis and modeling. In the course of the research, the following tasks were solved: firstly, the Expert model was formed based on the necessary and sufficient criteria for selecting respondents to the foresight study; secondly, the main characteristics of the Delphi method for consensus decisions in expert groups were identified. The research work considers various sources of information, which became the basis for the further development of the Expert model, based on an integrated approach based on the statistical, sociological and economic fields of science.Results. On the basis of bibliometric analysis, important criteria for the selection of experts were highlighted: a practical component, a theoretical component, a creative component, an assessment of belonging to a field of study, an assessment of work in a study, an adjustment of results. The relevance of the selection of an expert greatly influences the result of the foresight, therefore, there is a need for a balanced selection of respondents to the study. Foresight studies have a distinctive feature from other areas in that the result is the achievement of consensus between experts in the subject area. Decision makers are drawn from three areas of activity business, government, science. In this regard, criteria for the selection of respondents were formed, which imply the necessary and sufficient conditions. The necessary criteria are understood as such parameters, without which the characteristics of the expert do not allow the respondent to be an expert for this study. A sufficient condition for the participation of the decision maker in the foresight analysis implies such selection criteria, which are complementary characteristics of the expert, which do not need to prove that the expert is a suitable expert for a specific study. As a result, four necessary criteria for the selection of experts for groups were identified, as well as individual sufficient criteria for each group. The process of carrying out the Delphi method is considered, the advantages and disadvantages are determined, on the basis of which the resulting indicator is proposed the foresight research reliability index.Conclusion. The method of selection of experts allows a comprehensive approach to the problem in the field of formation of expert groups based on the introduction of digital technologies that improves the qualitative characteristics of foresight research. The confidence index, as a result indicator, determines the objectivity of the study based on expert assessments.

scholarly journals State of the art in selection of variables and functional forms in multivariable analysis—outstanding issues

2020 ◽  
Vol 4 (1) ◽  
Author(s):  
Willi Sauerbrei ◽  
◽  
Aris Perperoglou ◽  
Matthias Schmid ◽  
Michal Abrahamowicz ◽  
...  
Keyword(s):  
State Of The Art ◽  
Multivariable Analysis ◽  
Selection Of Variables ◽  
Functional Forms ◽  
Selection Of

scholarly journals Decision Making Methods in Comparative Studies of Complex Economic Processes Management

2020 ◽  
pp. 652-664
Author(s):  
Kesra Nermend ◽  
Mateusz Piwowarski ◽  
Mariusz Borawski
Keyword(s):  
Decision Making ◽  
Comparative Analysis ◽  
Decision Analysis ◽  
Expert Assessment ◽  
Demographic Situation ◽  
Multi Criteria Decision Analysis ◽  
Economic Process ◽  
Methodological Approaches ◽  
Support Methods ◽  
Selection Of

In this study different methodological approaches are used and described by many features (indicators) of complex socio-economic process. Outcome of analysis has the most reliable and acceptable representation of the studied process specific to chosen case. In order to solve problems in this area (depending on the situation, case under consideration), methods from two groups are most often used: multidimensional comparative analysis and multi-criteria decision analysis. The first of these cases concern problems at the macro level (socio-economic development, demographic situation, population's living standards, etc.), in which the decisionmaker's participation is relatively small (eg the selection of diagnostic variables or expert assessment). The second of these groups include issues in which the decisionmaker's participation is significant which are subjective to the decisions taken and reflects his or her preferences. Among the decision support methods, one can also distinguish those that have both the characteristics of methods from the area of multidimensional comparative analysis and multi-criteria decision analysis. The article presents the combination of both trends exposing maximum possibilities of using selected methods used in the decision making by Polish schools. The general methodological assumptions, advantages of having approaches discussed (in relation to other known methods) as well as the applied aspects (exemplary applications) also presented.

scholarly journals Selection of optimal thickness of thermal insulation of modular buildings on the basis of multicriterial analysis

2020 ◽  
pp. 82-91
Author(s):  
V. Zhelykh ◽  
◽  
Yu. Furdas ◽  
S. Shapoval ◽  
M. Rebman ◽  
...  
Keyword(s):  
Thermal Insulation ◽  
Multicriteria Analysis ◽  
Theoretical Research ◽  
Expert Assessment ◽  
Insulation Material ◽  
Modular Construction ◽  
Optimal Thickness ◽  
Short Period ◽  
Modular Buildings ◽  
Selection Of

Today modular construction is gaining popularity in the arrangement of production facilities. The purpose of the research is the theoretical substantiation of the choice of the optimal thickness of thermal insulation for external protections of modular buildings taking into account the evaluation criteria based on the method of hierarchy analysis. The article reflects the possibility of using modular buildings for residential and public needs. Given the peculiarities of the use of thermal insulation materials, such structures are erected in a short period of time due to the use of ready-made modules. It is also proposed to use multicriteria analysis to compare different thicknesses of thermal insulation of a modular building. The obtained results are presented in the form of petal diagrams and diagrams of global priorities, which made it possible to make an in-depth assessment of several thicknesses of thermal insulation. When conducting theoretical research, it should be noted that the importance of each of the criteria was taken into account for the selection of thermal insulation. An expert assessment was performed to determine the thickness of thermal insulation, which can be used for lightweight prefabricated structures of modular buildings. As a result of research, it was found that the most suitable thermal insulation material is polyurethane.

scholarly journals Investigating Investment, Inflation, Trade-Openness and Economic Progress Nexus for Pakistan

2020 ◽  
Vol V (IV) ◽  
pp. 1-9
Author(s):  
Aftab Anwar ◽  
Muhammad Masood Anwar ◽  
Ghulam Yahya Khan
Keyword(s):  
Economic Growth ◽  
Economic Performance ◽  
Trade Openness ◽  
Short Term ◽  
Economic Progress ◽  
Critical Measure ◽  
Selection Of Variables ◽  
Guide Lines ◽  
Selection Of

Since inflation and trade openness rate are considered as critical measure of an economy's health. This article analyze the relation of Economic growth with Investment, Inflation and Trade Openness of Pakistan for 1970- 2019. The policy guide lines from analysis include promotion of policies to increase Investment and Trade-openness in short and long-terms. The study used ARDL bound-testing for long-term and Un-Restricted-Error Correction techniques to discover short-term interrelation amongst a selection of variables. Results of study revealed inflation negatively related to economic performance and positively linked to Investment and Trade-Openness. Findings of enquiry suggested government should focus more on investment friendly policies in the country.

scholarly journals Integral approach of assessment of interaction level of stakeholders of construction enterprises

2021 ◽  
Vol 8 (11) ◽  
pp. 44-49
Author(s):  
Marusheva et al. ◽  
Keyword(s):  
Integrated System ◽  
Integral Approach ◽  
Direct Selection ◽  
Expert Assessment ◽  
Monitoring And Control ◽  
Construction Enterprise ◽  
Construction Enterprises ◽  
Integral Assessment ◽  
And Control ◽  
Selection Of

This article is devoted to issues of interaction of stakeholders of construction enterprises. First of all, the peculiarities of the construction industry are defined, which form additional requirements for the development of an integrated system for assessing interaction with stakeholders. Second, approaches to the formation of a register of potential stakeholders have been identified. A template for analysis has been developed, and individual examples are grouped by interaction directions. The methodology of identifying potential stakeholders by means of a three-level process of applying different versions of expert assessment methods in order to minimize their negative factor – subjectivity, is proposed. Methods of direct selection of experts and algorithms of their assessment are defined. Proposals to rank stakeholders according to their priority and potential result from their interaction with the construction enterprise have been developed. According to the integral assessment, ways of controlling the processes of interaction with stakeholders of different ranking levels are proposed, recommendations for building a further strategy for managing these processes are given. A system of modeling interaction between construction enterprises and stakeholders to ensure planning, organization, monitoring, and control processes in optimistic, realistic, and pessimistic scenarios has been created. Recommendations for further use of the methodology of integral assessment of the interaction of stakeholders of construction enterprises in practice are given.

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