scholarly journals Integral Assessment of Risk Level in Libraries using the Grey Clustering Method

2019 ◽  
Vol 8 (3) ◽  
pp. 6644-6650
Keyword(s):  
Real Data ◽  
Environmental Engineering ◽  
The Other ◽  
Risk Level ◽  
Clustering Method ◽  
Standard Data ◽  
Minimum Standards ◽  
Grey Clustering ◽  
National University ◽  
Integral Assessment

The purpose of this study is to simultaneously analyze the different risk factors (lighting, noise, and ergonomics), obtain an overall assessment of the risk of these factors and classify them in scales of levels of: Very poor, poor, good and very good, from three libraries of the National University of Engineering. In order to classify them, the grey clustering method was used, which establishes two types of data: Standard data and sampling data, the first one refers to the minimum standards required to be met by a library according to each criterion (lighting, noise, ergonomics). The second one refers to the real data obtained in the field. Both data are evaluated in the indicated methodology and the clustering vector is constructed, which will allow to classify the libraries in the scales of established levels. According to the results obtained, it was determined that the lowest noise levels were obtained in the library of the Faculty of Environmental Engineering; nevertheless, these levels are not within the minimum standards of noise for libraries; in addition, it was determined that the lowest values obtained in illumination of each library correspond to the library of the Faculty of Environmental Engineering, since it is in levels of illumination significantly below what is required according to the minimum standards. On the other hand, adequate lighting levels were obtained in the library of the Faculty of Sciences, and it was determined that the best ergonomic comfort was obtained in the Central Library. According to the overall assessment of each of the libraries under study, according to the scale of levels established, it is concluded that the library of the Faculty of Environmental Engineering is at a poor level with respect to the other libraries (good level).

Grey Clustering Model of Coating Erosion Resistance Evaluation

2012 ◽  
Vol 602-604 ◽  
pp. 2263-2266
Author(s):  
Bao Ping Chen
Keyword(s):  
Erosion Resistance ◽  
Evaluation Process ◽  
Comparison Method ◽  
The Other ◽  
Clustering Method ◽  
Resistance Evaluation ◽  
Accurate Evaluation ◽  
Clustering Model ◽  
Grey Clustering ◽  
Data Volume

The erosion resistance evaluation of coating has important academic significance as well as project application value. Being the traditional way, the direct comparison method requires large amount of trivial work. By taking different coatings as clustering objects and data obtained from coating in erosion experiments as clustering index, this paper, on the other hand, defines the whitenization weight function of the index with grey clustering method, and has in this way built the grey clustering mathematical model of coating erosion resistance evaluation. As is proved in practice that the model makes it possible to evaluate the erosion resistance of coating scientifically, making the evaluation more reasonable and objective. At the same time, due to the accurate evaluation results, it avoids the subjectivity and one-sidedness otherwise being unavoidable for judging by experience. The coating erosion resistance experiments do not have strict demands for data volume, which makes the evaluation process both simple and scientific.

scholarly journals Theory and Applications of the Unit Gamma/Gompertz Distribution

Mathematics ◽  
2021 ◽  
Vol 9 (16) ◽  
pp. 1850
Author(s):  
Rashad A. R. Bantan ◽  
Farrukh Jamal ◽  
Christophe Chesneau ◽  
Mohammed Elgarhy
Keyword(s):  
Stochastic Ordering ◽  
Real Data ◽  
Rate Function ◽  
The Other ◽  
Likelihood Method ◽  
Model Parameters ◽  
Data Sets ◽  
Gompertz Distribution ◽  
Probability And Statistics ◽  
Analytical Behavior

Unit distributions are commonly used in probability and statistics to describe useful quantities with values between 0 and 1, such as proportions, probabilities, and percentages. Some unit distributions are defined in a natural analytical manner, and the others are derived through the transformation of an existing distribution defined in a greater domain. In this article, we introduce the unit gamma/Gompertz distribution, founded on the inverse-exponential scheme and the gamma/Gompertz distribution. The gamma/Gompertz distribution is known to be a very flexible three-parameter lifetime distribution, and we aim to transpose this flexibility to the unit interval. First, we check this aspect with the analytical behavior of the primary functions. It is shown that the probability density function can be increasing, decreasing, “increasing-decreasing” and “decreasing-increasing”, with pliant asymmetric properties. On the other hand, the hazard rate function has monotonically increasing, decreasing, or constant shapes. We complete the theoretical part with some propositions on stochastic ordering, moments, quantiles, and the reliability coefficient. Practically, to estimate the model parameters from unit data, the maximum likelihood method is used. We present some simulation results to evaluate this method. Two applications using real data sets, one on trade shares and the other on flood levels, demonstrate the importance of the new model when compared to other unit models.

Hands Stencils in El Castillo Cave (Puente Viesgo, Cantabria, Spain). An Interdisciplinary Study

2021 ◽  
pp. 1-21
Author(s):  
Sergio Ripoll ◽  
Vicente Bayarri ◽  
Francisco J. Muñoz ◽  
Ricardo Ortega ◽  
Elena Castillo ◽  
...  
Keyword(s):  
High Resolution ◽  
Real Data ◽  
Digital Processing ◽  
The Other ◽  
Major Step ◽  
The People ◽  
High Resolution Images ◽  
Real Picture ◽  
Interdisciplinary Study ◽  
Very High

Our Palaeolithic ancestors did not make good representations of themselves on the rocky surfaces of caves and barring certain exceptions – such as the case of La Marche (found on small slabs of stone or plaquettes) or the Cueva de Ambrosio – the few known examples can only be referred to as anthropomorphs. As such, only hand stencils give us a real picture of the people who came before us. Hand stencils and imprints provide us with a large amount of information that allows us to approach not only their physical appearance but also to infer less tangible details, such as the preferential use of one hand over the other (i.e., handedness). Both new and/or mature technologies as well as digital processing of images, computers with the ability to process very high resolution images, and a more extensive knowledge of the Palaeolithic figures all help us to analyse thoroughly the hands in El Castillo cave. The interdisciplinary study presented here contributes many novel developments based on real data, representing a major step forward in knowledge about our predecessors.

scholarly journals Applicability of the Moyers' Probability Tables in Adolescents with Different Facial Biotypes

2017 ◽  
Vol 11 (1) ◽  
pp. 213-220
Author(s):  
Jorge J. Pavani Carrillo ◽  
Maria C. Rubial ◽  
Cristina Albornoz ◽  
Silvina Villalba ◽  
Patricia Damiani ◽  
...  
Keyword(s):  
The Other ◽  
Mixed Dentition ◽  
Lower Range ◽  
Other Hand ◽  
National University ◽  
Probability Table ◽  
Correct Location ◽  
The City ◽  
Mixed Dentition Analysis ◽  
Lower Incisors

Introduction: The Moyers’ probability tables are used in mixed dentition analysis to estimate the extent of space required for the alignment of canines and premolars, by correlating the mesiodistal size of lower incisors with the size of permanent canines and premolars. Objective: This study intended to evaluate the applicability of the Moyer's probability tables for predicting the mesiodistal space needed for the correct location of premolars and permanent canines non-erupted, in adolescents of the city of Cordoba, Argentina, who show different facial biotypes. Materials and Methods: Models and tele-radiographies of 478 adolescents of both genders from 10 to 15 years of age were analyzed. The tele-radiographies were measured manually in order to determine the facial biotype. The models were scanned with a gauged scanner (HP 3670) and measured by using Image Pro Plus 4.5 software. Results: According to this study, the comparison between the Moyer´s probability table, and the table created at the National University of Córdoba (UNC) (at 95%, 75%, and 50%) shows that, in both tables, a higher value of mesiodistal width of lower incisors corresponds to a bigger difference in the space needed for permanent canines and premolars; being the need for space for permanents canines and premolars bigger in the UNC´s table. On the other hand, when contrasting the values of mesiodistal space for permanent canines and premolars associated with each facial biotype, the discrepancies between groups were not statistically significant (P >0.05). However, we found differences in the size of the space required according to the mesiodistal width range of the lower incisors for each biotype: a) The comparison of lower-range values, with a mesialdistal width of lower incisors less than 22 mm, the space required for permanent canines and premolars resulted smaller in patients with dolichofacial biotype than in patients with mesofacial and braquifacial biotypes. The latter biotypes have meager differences between them. b) The comparison of mid-range values, with a mesialdistal width of lower incisors from 22 to 25 millimeters, shows that the values of required alignment space are similar in the three facial biotypes. c) Finally, the comparison of upper range values, with a mesialdistal width of lower incisors greater than 25 millimeters, indicates that the space required for dolichofacial biotypes tends to be higher than in mesofacial and brachyfacial biotypes. Conclusion: The Moyer´s probability tables should be created to meet the needs of the population under study, with no consideration of patients’ facial biotypes.

scholarly journals FRACTAL * MODEL OF CONSERVATIVE DEVELOPMENT (an example of trust algebra, that is, state building with a trust operation)

2019 ◽  
pp. 44-53
Author(s):  
Vadim Chuiko ◽  
Valery Atamanchuk-Angel
Keyword(s):  
Social Relations ◽  
Social Systems ◽  
A Priori ◽  
Full Range ◽  
Time Frame ◽  
Fractal Model ◽  
The Other ◽  
National University ◽  
Philosophy Professor ◽  
Methodological Guidelines

In this article of the Doctor of Philosophy, professor of Taras Shevchenko Kyiv National University, Chuiko Vadim Leonidovich and Atamanchuk-Angel Valerii Ivanovich is applied the principle of «first philosophy» as the foundation of the a priori prerequisites of possible cognition, which define an existence in general rather than its individual parts. This application of metaphysics made it possible to introduce methods of «universal algebra» for the implementation of humanitarian research using algebraic description with the help of three notion: plural, operations, relation. This methodological novation makes it possible to create demonstrative models of social systems, not their constructions, because constructionsare traditionally makeby using binary description that use only two notions, categories. Question: How to fill the notion of «public agreement» with the actual content? How to make all generations participate in the adoption of a social contract? How to create a new one, without destroying it entirely, maintaining stability? How to ensure a high degree of mutation — rebuilding, rebuilding and construction? Introduced in the algebraic sense, the notion of «trust» as a definition of what is necessary for the existence of a society of being as such, forms an algebra that models social relations by the operation of trust, not violence. Based on the above, we can talk about creating a mathematical politics. Matpoliticsdeal with ideal political objects. Matpolitics is the activity of a summation of algebras. These algebras differ from each other by the choice of operations. Plurals that consist of different algebras can be the carrier of the algebra. In this case, we are talking about the algebra of trust / credo, whose signature consists of the following operations: sovereignty, trust / credit, understanding of need for the Other, agreement and recursive procedures. The result of the implementation of these methodological guidelines are the answers to the following questions: How to make the concept of «social agreement» really meaningful? How can all generations (and the unborn, too) be involved in the social agreement? How to create a new one, without destroying the foundations of the existing one, to realize the idea of conservative development: restructuring and building a new one? Based on the provisions of the algebra of trust, society appears as a plurality of sovereigns — C, possessing the full range of rights to identify trust / distrust — Di, creating agreements — Yn, and for their completeness they have and understand the need for the other — Ik. The model presented is a system of treaties that are not an abstract concept of the state, but an agreement with specific elected people who have gained the trust of those to whom they temporarily render their services. Agreements are urgent, limited by time frame, with obligatory full responsibility of the parties.

Long-Lasting Legacy of Rent Controls: Perspectives on the Private Rental Market in Malta within the Context of a Dual Market

2021 ◽  
Vol 15 (2) ◽  
pp. 43-54
Author(s):  
Brian Micallef
Keyword(s):  
Data Collection ◽  
Housing Market ◽  
The Other ◽  
Data Sources ◽  
Historical Background ◽  
Alternative Source ◽  
Rental Market ◽  
Minimum Standards ◽  
Recent Developments ◽  
Source Of Information

Up to a few years ago, the private rental market in Malta was a classic example of the dysfunction created by two diametrically opposed regimes – a rigidly-controlled one and a completely liberal one – co-existing side by side. Two recent reforms have sought to address this situation. The objective of this paper is to describe the state-of-play in the private rental market in Malta by providing a historical background to these recent developments. In addition to the distortions in the housing market that rent controls introduce, controls also contributed to the deterioration of the statistical infrastructure to collect data on this sector. From this perspective, the introduction of the 2020 rent reform for the post-1995 sector, in addition to providing a set of minimum standards to professionalize the market, also facilitated data collection efforts through the introduction of a rent register. This information provided an alternative source of information to complement the other data sources, which tend to be outdated, inadequate, or focus solely on specific segments of the market, thus allowing for a more detailed and complete view of the private rental market in Malta.

Spreading Activation Connectivity Based Approach to Network Clustering

2018 ◽  
pp. 207-219
Author(s):  
Alexander Troussov ◽  
Sergey Maruev ◽  
Sergey Vinogradov ◽  
Mikhail Zhizhin
Keyword(s):  
Big Data ◽  
Social Network ◽  
Social Systems ◽  
Network Models ◽  
Real Data ◽  
Spreading Activation ◽  
Network Clustering ◽  
Clustering Method ◽  
Network Characteristics ◽  
Structure Detection

Techno-social systems generate data, which are rather different, than data, traditionally studied in social network analysis and other fields. In massive social networks agents simultaneously participate in several contexts, in different communities. Network models of many real data from techno-social systems reflect various dimensionalities and rationales of actor's actions and interactions. The data are inherently multidimensional, where “everything is deeply intertwingled”. The multidimensional nature of Big Data and the emergence of typical network characteristics in Big Data, makes it reasonable to address the challenges of structure detection in network models, including a) development of novel methods for local overlapping clustering with outliers, b) with near linear performance, c) preferably combined with the computation of the structural importance of nodes. In this chapter the spreading connectivity based clustering method is introduced. The viability of the approach and its advantages are demonstrated on the data from the largest European social network VK.

Comparing Oculometer and Head-Fixed Reticle with Voice or Switch for Tactical Display Interaction

1988 ◽  
Vol 32 (2) ◽  
pp. 116-120
Author(s):  
Christopher C. Smyth ◽  
Mary E. Dominessy
Keyword(s):  
Statistical Analysis ◽  
Data Entry ◽  
The Other ◽  
Spatial Accuracy ◽  
Touch Panel ◽  
Standard Data ◽  
Significant Difference ◽  
Air Combat

An experiment with 15 U.S. Army enlisted military subjects was conducted to compare the performance of an oculometer, head-fixed reticle, and touch panel for data entry on a generic tactical air combat display. The subjects used voice or switch to designate data items on the display that were selected with the oculometer or fixed reticle. The touch panel was included as a standard data entry device. Statistical analysis showed a significant difference in performance for the five configurations at the .0001 level. The reticle/switch, oculometer/switch, and touch panel are significantly faster than the reticle/voice, which in turn is significantly faster than the oculometer/voice. The reticle methods are faster than the oculometer methods. The switch action is faster than voice entry. The touch panel is twice as accurate as the other methods, all of which have about the same spatial accuracy whether oculometer or reticle, voice or switch. However, the oculometer/voice has nearly twice as many selection errors as the other methods.

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