Clustering algorithms are used prominently in co-citation analysis by analysts aiming to reveal research streams within a
field. However, clustering of widely cited articles is not robust to small variations in citation patterns. We propose an
alternative algorithm, dense network sub-grouping, which identifies dense groups of co-cited references. We demonstrate the algorithm using a data set from the field of family
business research and compare it to two alternative methods, multidimensional scaling and clustering. We also introduce a
free software tool, Sitkis, that implements the algorithm and other common bibliometric methods. The software identifies journal-,
country- and university-specific citation patterns and co-citation groups, enabling the identification of “invisible colleges.”
Definition of types, amount and positions of cranes in construction site planning has a big impact on the overall productivity and cost effectiveness of a construction project. It is not rare, that engineers during preparation phase of construction fault in crane selection. It implies big financial losses for the company because of wrong crane rent. In visualisation of mobile crane operation in 3D is noticeable that working radius of the crane is considerably less then number listed in crane technical documentation (capacity chart). The built construction itself can reduce the crane radius when the crane boom snags the built object edge. Several computer applications were developed in order to help practitioners in selecting and using of cranes. In the paper is presented one version of non-commercial software tool (Mobile Crane Simulator) useful in construction preparation as a tool for selecting and locating of the mobile crane at construction sites. The tool was developed by authours of the paper. The principles of the tool creation are also explained.
The paper presents simulation results of a two-dimensional permanent magnet synchronous motor, which were calculated by the help of the Infolytica MotorSolve and of the COMSOL Multiphysics, as well. The simulation results were compared with each other focusing on the torque, the magnetic flux density and the magnetic potential of the permanent magnet synchronous motor.
invaluable technique of microarray. Therefore, in 1985, microarray was funded and has progressed by the time. Because of the establishment of a diversity of online and offline software, tools, and databases, the molecular nucleic acid-based technologies have
There are several outdoor microclimatic simulation software tools in use. The current research aims to identify some of the most prominent computer-based tools based on their capacity of predicting a significant number of variables and compare them in order to establish their differences. This article provides an overview of the applications of computational fluid dynamics in outdoor performance simulation, focused on three topics: general criteria, specific outputs, strategies, and elements can be investigated by the tool. The results have shown that ENVI-met tool is capable of predicting and simulating the set microclimate variables.
The paper describes efficient methods to post-process results from the finite element analysis. Amount of data produced by the complex analysis is enormous. However, computer performance and memory are limited and commonly-used software tools do not provide ways to post-process data easily. Therefore, some sort of simplification of data has to be used to lower memory consumption and accelerate data loading. This article describes a procedure that replaces discrete values with a set of continuous functions. Each approximation function can be represented by a small number of parameters that are able to describe the character of resulting data closely enough.
Double skin façades are façade technologies that have the perspective of reducing energy use and improving comfort in buildings due to their adaptable nature. Exhaust-air façades offer the possibility to utilize solar energy by recovering heat from the façade cavity. However, the cavity overheating can be detrimental on the summer performance. Predicting performance and optimizing the system during the design phase is a challenge, especially when the cavity-air is integrated into the HVAC system. Whole-building energy simulation (BES) software tools are an adequate tool for calculating whole building performance, although these can have limitations in the accurate replication of complex building elements. The paper analyses the available and applied modelling approaches within a BES tool, and compares the outputs in terms of cavity temperature, horizontal and vertical temperature profiles, and heat flux through the façade. The sensitivity of the results on the modelling approach is evaluated. Results can serve as a guide for practitioners on the selection of the modelling approach for a given task.
Authors:Věra Jedináková-Křížová, Josef Zeman, Hana Vinšová, and Eduard Hanslík
The contribution is focused on chemical, geochemical and mineralogical research of bentonite stability with the aim to determine
the effect of saturation medium composition and loading by heat on bentonite stability. The main part of the research is directed
to the experimental results of bentonite and bentonite leachate samples obtained for the bentonite interaction under laboratory
experiments. Computer-modeling methods were used to calculate equilibrium thermodynamic principles, the distributions of predominant
aqueous species, and potential solubility controls for the environmentally important oxidation states of each investigated
radioactive contaminants. The Eh–pH diagrams of individual chemical species of the tested radionuclides were calculated by
the geochemical software tool Geochemist’s Workbench that included the actual chemical compositions of the solid–liquid systems
under the given experimental conditions. It was confirmed that smectites are transformed to more stable silicate phases, such
as illite/smectite mixed layers, illite. The data obtained from the model calculations conform with experimental results.
The effect of the variable aqueous phase composition on bentonite stability using Ca–Mg and Na–Ca bentonites for the experiments
was studied. The synthetic granitic waters with the higher concentration of the K+ and Mg2+ cations were applied for the study of bentonite stability.
Authors:Cesar Macías-Chapula and Acacia Mijangos-Nolasco
The purpose of this paper is to present the preliminary results of a bibliometric analysis of AIDS documents as produced on
Sub-Saharan Africa. AIDSLINE 1980-2000 was used to conduct the literature search. In this paper, an analysis was made only
of the records retrieved under "Central Africa". Bibexcel (version 2001) and Microsoft Excel (2000) were used as software
tools to conduct the analysis of the records. Seven countries and 1052 records were identified. Main participating countries
were Democratic Republic of the Congo (527 documents), and Cameroon (271). Results indicated a high pattern of collaboration
through multiple authorship. Most documents were published in English (84.50%) and French (14.73%). Over 57% corresponded
to journal articles. The subject content of the documents was mainly focused on epidemiological, complications, and prevention
& control issues on ‘HIV Infections’ and ‘Acquired Immunodeficiency Syndrome’. Countries behind this productivity were Cameroon,
USA, Democratic Republic of the Congo, France, and Belgium. Comparison of results among Central African countries and among
other developing countries is made by the authors.