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Probrano po
3.632 (11-20)
NaslovEvaluation of the effective factors on social interactions in the design of public libraries / Reza Askarizad.
Materijalni opisIlustr. ; graf. prikazi.
Način izrade datotekeizvorno digitalna građa
Vrstačlanak
OpisNowadays, the interaction of people in the world is deemed a controversial topic and consequently, the creation of an appropriate context for interacting with individuals is one of the issues that is considered by architects in many designs. In this research, it has been endeavored to consider the factors affecting social interactions in the design of public libraries through the descriptive-inferential analysis. The results of this research reveal that in the architectural spaces that have been designed with open-configured plans, spatial integrity and sociability will increase. On the other hand, the factors such as depth and the level of privacy are also reduced. Therefore, in designing a public library with an approach toward social interaction, there should be a variety of open and closed-configured spaces in the plan that allow users to choose the space they optionally want and in which they would enjoy in their own presence by choosing their own activities.
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11
NaslovReference breast phantoms for low-cost microwave imaging / Emine Avşar Aydin, Selin Yabaci Karaoğlan.
Materijalni opisIlustr.
Način izrade datotekeizvorno digitalna građa
Vrstačlanak
OpisMicrowave imaging provides an alternative method for breast cancer screening and the diagnosis of cerebrovascular accidents. Before a surgical operation, the performance of microwave imaging systems should be evaluated on anatomically detailed anthropomorphic phantoms. This paper puts forward the advances in the development of breast phantoms based on 3D printing structures filled with liquid solutions that mimic biological tissues in terms of complex permittivity in a wide microwave frequency band. In this paper; four different experimental scenarios were created, and measurements were performed, and although there are many vector network analyzers on the market, the miniVNA used in this study has been shown to have potential in many biomedical applications such as portable computer-based breast cancer detection studies. We especially investigated the reproducibility of a particular mixture and the ability of some mixes to mimic various breast tissues. Afterwards, the images similar to the experimentally created scenarios were obtained by implementing the inverse radon transform to the obtained data.
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12
NaslovA strategic service management model in national gas distribution projects / Fereidoun Esmaeilzadeh, Kazem Askarifar, Pegah Alamdari.
Materijalni opisGraf. prikazi.
Način izrade datotekeizvorno digitalna građa
Vrstačlanak
OpisThe main purpose of this research was to develop a model regarding strategic service management in order to improve the performance of projects related to the oil and gas industry. To this end, this study was conducted in two steps. Firstly, the main practices of SSM were defined by a systematic review and completed by experts’ interviews, and the data onto the expected and perceived about each practice were collected by using a questionnaire answered by the managers and direct experts of the Fars Gas Company, Iran, and its contractors in a five-year period. Finally, the SSM model was determined in a focus group. All participants were selected judgmentally and purposefully based on theoretical saturation. The findings show that the employer expects the contractor to improve the communication skills and the grooming and professional appearance of its staff and that they spend enough time processing the employer requests. As a result, the SSM model was developed based on four strategic cornerstones, including managerial attitude improvement, managing communications, improving business processes, and strengthening internal controls.
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13
NaslovThe effect of the holding pressure profile on the metal injection molded component dimensions after sintering / Emir Šarić, Samir Butković, Muhamed Mehmedović.
Materijalni opisIlustr.
Način izrade datotekeizvorno digitalna građa
Vrstačlanak
OpisThe volumetric flow rate (injection velocity) and the holding pressure are metal injection molding (MIM) parameters that have a strong influence on the green parts density and density homogeneity, but their effect on sintered dimensions after sintering is still to a large extent unexplored. To reveal the relationship between the injection molding parameters and sintered dimensions, ring-shaped components were injection molded by using different values of injection velocities in combination with a rump-down and rumpup holding pressure profile. Afterwards, the green components were catalytically debound and sintered in the nitrogen (N2) atmosphere. Finally, the component dimensions: the height, inner and outer diameter were measured by using a coordinate measuring machine. The ready-to-mold granules Catamold 310N made of heat resistant stainless steel X40CrNiSi 25-20 (according to the EN standard) powder and polyacetal based binder were used. The results showed that the interaction between the injection velocity and the holding pressure profile can be used to systematically adjust shrinkage after sintering. This approach is based on the dependence of the binder crystallization temperature on pressure, when the powder/binder proportion changes with the injection velocity.
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14
NaslovInfluence of the varnishing "surface" coverage on optical print characteristics / Tomislav Hudika, Igor Majnarić, Tomislav Cigula.
Materijalni opisIlustr.
Način izrade datotekeizvorno digitalna građa
Vrstačlanak
OpisVarnishing is often used to protect or decorate the print, but it can also influence the print’s colour appearance. Therefore, varnishing should enhance the print role, while colour change should be kept as low as possible. The aim of this paper is to evaluate inkjet UV LED varnishing by estimating optical print characteristics. Prepared offset prints were UV LED varnished in different surface coverage values (SCV) with a matte and gloss finish. The prints were evaluated by measuring gloss and colour coordinates. Secondly, varnishing was performed in a different SCV, which enabled assessing the optimal SCV, i.e. the most cost-efficient varnishing. The printing process was conducted in a standardized and controlled laboratory environment, regulated via the ISO 12647-2:2013 norm to ensure that the black colour was reproduced in the standard tolerance. The results showed that the colour difference is negligible (stays in the ISO tolerances), regardless of the varnishing SCV. On the other hand, the optimal printing gloss is at the SCV of 100%.
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15
NaslovImage artefacts in industrial computed tomography / Amalija Horvatić Novak, Biserka Runje, Zdenka Keran, Marko Orošnjak.
Materijalni opisIlustr.
Način izrade datotekeizvorno digitalna građa
Vrstačlanak
OpisComputed tomography is a method that has been used for many years in medicine and material analysis, and recently it has also been introduced in dimensional measurements. The method has a lot of advantages compared to other 3D measurement methods, with the largest one being the possibility to perform a non-destructive measurement of an object’s inner geometry. However, it is a complex method with a large number of parameters that influence measurement results. Some of these parameters are image artefacts that occur in the scanning and reconstruction process. An artefact is any artificial feature which appears on the CT image, but does not correspond to the physical feature of an object. In order to achieve metrological traceability, it is necessary to eliminate and minimize the influence of image artefacts on measurement results. This paper presents and explains image artefacts in industrial computed tomography as the consequences of different influence parameters in the CT system.
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16
NaslovDesigning an integrated model of oil and gas management with a SWOT approach : the case of NIOC / Seyed Emad Hosseini, Amir Naser Akhavan, Mohsen Bahrami.
Materijalni opisGraf. prikazi.
Način izrade datotekeizvorno digitalna građa
Vrstačlanak
OpisIn the recent years, the growing demand for energy on the one hand and the reduction of conventional hydrocarbon reserves on the other hand have made the proper extraction of oil and gas reserves, i.e. reservoir management issues, more important and hence proper management of these reserves is inevitable. Although renewable energies currently provide the bulk of the world’s energy needs, hydrocarbon fuels remain the main source of energy until 2035.Despite the growing importance of the Integrated Reservoir Management Model (IRMI), as a rational solution to maximize economic production from oil and gas reservoirs, a comprehensive model that can cover all reservoir management modules has not yet been proposed. In this paper, by examining the current condition of reservoir management in one of the subsidiaries of the National Iranian Oil company and analyzing the obtained results, we offer some solutions to improve the condition and finally, we present a comprehensive model for reservoir management in this company.
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17
NaslovAccuracy analysis of point velocities determined by different software packages and GNSS measurement processing methods / Margareta Premužić, Almin Đapo, Željko Bačić, Boško Pribičević.
Materijalni opisGraf. prikazi.
Način izrade datotekeizvorno digitalna građa
Vrstačlanak
OpisThe paper analyzes the geodynamic network of the City of Zagreb for periodic campaigns carried out from 2006 to 2009 which were processed by different software packages. The first computations and processing results were obtained by using the scientific software Gamit/Globk and indicate the ongoing tectonic activity of the area. In this paper, all calculations were performed by using the scientific software Bernese. Processing strategies and applied error models in the Gamit and Bernese solution are analyzed. The results of the previous analyses show the need to perform GNSS measurements at intervals of up to one year, which is necessary for understanding the mechanism of the structural frame of the wider Zagreb area. The research and analysis performed in this paper indicate certain uncertainties in determining the velocities from periodic one-year GNSS measurements. When periodic GNSS observations are analyzed at time intervals shorter than 2.5 years, annual signals can cause significant errors in determining point velocities. The accuracy of determining velocities between annual time intervals depends on a number of factors: noise level in GNSS measurements, measurement sessions quantity and applied computation strategies. Previously, the time series analysis of observations was a key procedure in the context of geodynamic and geokinematic research and the FODITS algorithm was used for the analysis. A noise analysis on the daily time series of coordinates was performed for the purpose of understanding all influences on geodynamic points. Moreover, a correlation between the time series of observations was determined in order to estimate the final velocity uncertainty error.
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NaslovStatistical methods in building industry to determine prices indices / Helena Ellingerová, Zora Petráková, Ingrida Skalíková.
Materijalni opisGraf. prikazi.
Način izrade datotekeizvorno digitalna građa
Vrstačlanak
OpisTender price is often affected by the location of the construction, which is usually determined by the investor, and it has an impact on the traffic in the particular location. Individual time of supply and the method of realization play an important role as well. They both are determined by the investor along with the designer of the particular construction. Contractors often complain about the lack of time needed for the preparation of their tender prices. Therefore, it is necessary to look for the possibilities how to reliably speed up this process at the same time taking into account all of the specific features of a structure. This article deals with the application of two statistical methods. The Pareto analysis, which can be used during the design of the tender price, and the extrapolation method, which can be used for the estimation of the price development, based on the regression analysis of the time series. The results of the article particularly serve to contractors in the building industry to better prepare their price offers in tenders. The findings of this document may also be applicable in other countries which have a similar economic profile as Slovakia.
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19
NaslovResearch of the residual bearing capacity and the work of damaged reinforced concrete beams' inclined sections / Zeljko Kos, Yevhenii Klymenko, Kostiantyn Polianskyi, Andjelko Crnoja.
Materijalni opisGraf. prikazi.
Način izrade datotekeizvorno digitalna građa
Vrstačlanak
OpisThe article is devoted to studies about the stress-strain state and the residual bearing capacity of inclined sections of reinforced concrete beams with concrete damages in the compressed zone near support areas. The developed method of calculating the bearing capacity of the inclined sections of damaged beams is described. The numerical test of prototypes was performed in the LIRA-CAD 2017 software complex. A comparison of the results of laboratory tests, a numerical experiment and calculation results by the proposed method is shown. It is stressed that with an increase in the area of damage, the bearing capacity decreases. The nature of the change in the stress-strain state under the presence of damage is described. It is pointed out that in the damaged samples, there is an inclination of the neutral axis in the cross section of the element – it tilts, the neutral axis becomes, almost, parallel to the front of the damage.
rrep
20
3.632 (11-20)