Aleksandar Djordjevic

Aleksandar Djordjevic
University of Kragujevac · Faculty of Engineering

Doctor of Philosophy

About

41
Publications
11,370
Reads
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236
Citations
Additional affiliations
March 2012 - April 2016
University of Kragujevac
Position
  • Research Assistant

Publications

Publications (41)
Article
Full-text available
Enterprise sustainability is a key aim in the fourth industrial revolution era, requiring a new approach based on intelligent technologies that considers the new roles of leadership and sustainability as well as the new trends in emerging smart technologies, with a new focus on Society 5.0. Smart parking has a significant role in fostering the dete...
Article
Full-text available
In order to adapt to ever-changing customer needs and satisfy them, good Business Process Management (BPM) in Small and Medium-sized Enterprises (SMEs) is crucial. The target group of this research is production SMEs whose BPM can be monitored respecting the values of key performance indicators (KPIs). This paper shows how improving the performance...
Article
Full-text available
The primary purpose of this paper is to present a system intended for student education based on a microcontroller platform and a cloud system where data will be stored. Obtained research results will be based on the application of The NodeMcu platform for data collection with sensor systems. MatLab, ThingSpeak cloud system and the Virtuino platfor...
Article
Full-text available
The problem of sustainable business excellence has been investigated according to different aspects in different fields. For a more detailed analysis, it is necessary to develop an integrative sustainable business excellence model, respecting the baseline model of business excellence according to the European Foundation of Quality Management, with...
Article
Full-text available
The development of today's economies is inconceivable without energy. However, fossil fuel reserves are declining, climate change is accelerating and some changes in the energy sector are needed. Renewable energy sources are a potential solution for many scientists and practitioners. However, the planning and implementation of renewable energy proj...
Article
Full-text available
This paper aims to propose a quality assessment model for higher education institutions in the technical-technological field and a system for decision support and optimal management strategies for quality improvement. Obtaining research results is based on surveying stakeholders in higher education and obtaining quantitative data regarding key perf...
Preprint
Full-text available
Nonconformity detection and reporting are evergoing issues in quality management practice and theory. Throughout industrialisation, and consequently, in the Industry 4.0 period, manufacturing organisations strived to reduce nonconformities to the minimum level and reach zero-defect production. Nowadays, it is feasible to overcome this issue by inco...
Article
Full-text available
End-of-life vehicle (ELV) recycling is a process that spends energy and could be an energy source as well. This part of energy recovering depends on many different factors related to the broad and local aspects of ELV recycling. The ELV recycling process is consuming energy from different energy sources (electrical, fossil), however, this consumpti...
Article
The Industry 4.0 has become an important concept as well as direction in the industrial and social development. In the core of this new shift is implementation of new technologies that open a number of important issues, starting from managing complexity of the systems, up to new educational and training needs for students and employees. In this pap...
Article
Full-text available
This paper describes the nanomechanical characteristics of Zirconium (IPS e.max ZirCAD, Ivoclar Vivadent) treated with three different surface finishing techniques: polishing, glazing and grinding, using the Anton Paar nanoindentation. The hardness (HV) and Elastic modulus (E) of the surface structure were presented as results of nanoindentation me...
Article
Full-text available
The issues of operational, organisational and process risk assessment in supply chains (SCs) are the most usually analysed, while other risk groups (like economic and social risks) are not taken into account, even though they have a critical effect on the competitive advantage and SCs sustainability over long time periods. The determination of risk...
Article
Full-text available
A tribological system is a complex non-linear system composed of the elements that are connected structurally and functionally. The aim of this paper is to present an overview of artificial neural networks, its development and applications of neural networks in the prediction of tribological properties of dental glass ceramic using a newly measured...
Article
Full-text available
In a modern era of information technologies, everyday changes are more numerous and various. One of those changes is related to the greater use of mobile devices in a decision making processes. They may be used in the field of automation and improvement of production processes. Their main purpose may be seen as the achievement of optimal production...
Conference Paper
Full-text available
Goal of this paper is to present current energy situation of the municipality of Štrpce and to define potential measures for its improvement. A total of 5 measures have been proposed to improve quality of supply. Future research should elaborate the proposed measures in detail and define concrete projects for improving the energy situation in Štrpc...
Article
In the sense of contemporary industrial challenges, it may be said that many issues in the field of recycling may be analysed. In this paper, the model for choosing locations for construction of recycling centres equipped with new technology is proposed. The considered problem may be stated as a two-objective optimization problem, if the optimizati...
Article
Full-text available
In this paper Artificial Neural Network (ANN) model was developed for prediction of kerf width in plasma jet metal cutting process. Process parameters whose influence was analyzed are cutting height, cutting speed and arc current. An L18 (21x37) Taguchi orthogonal array experiment was conducted on aluminium sheet thickness of 3 mm. Using the experi...
Article
The problem of assessment, selection and improvement of key performance indicators in the New Service Development process is one of the most important tasks of process managers, and it has a critical effect on the considered process effectiveness which is further propagated on the competitive advantage of each service small and medium enterprises....
Article
Full-text available
The problem of classification of risk factors in an uncertain environment is part of the risk management problem, which has a critical effect on the competitive advantage of production supply chain. The severities of consequences, their relative importance, and the frequency of occurrence of risk factors are defined by risk management team, dependi...
Conference Paper
Full-text available
Plasma Jet Cutting process is one of the most important nonconventional machining methods that uses a thermal energy of highly ionized gas to cut specified material. Its optimal combination of cut quality, productivity and costs in cutting various types of materials increase its demand in the market and usually position it in front of the other cut...
Chapter
Full-text available
Abstract: In digital era knowledge gains one of a key roles for sustainable success. For regional sustainability profile of knowledge traits are different than in a previous period. Knowledge has to be more appropriate for digitalisation and digital transformation with new traits of leaders for leading digital change in more complex and competitive...
Article
Full-text available
Today highly competitive market and demands for obtain high surface finish and machining of complex shape geometries replace conventional machining processes with non-conventional. Plasma jet cutting is one of these non-conventional processes that primary uses a thermal energy of highly ionized gas to cut specified material and blow molten metal aw...
Article
Full-text available
The difference between the production cost and selling price of the products may be viewed as a criterion that determines an organization’s competitiveness and market success. In such circumstances, it is necessary to impact these criteria in order to maximize this difference. The selling products’ price, in modern market conditions, is a category...
Article
Full-text available
In information technologies, in the last few years, the changes are numerous and dynamic, and one of those changes is the massive use of mobile devices. They are not only used for communication, but also for access to applications and data in databases. Interactive processing of data from social networks, which is a priority for the mobile device,...
Article
Full-text available
The diversity of business processes is very large, and in addition to this diversity between processes there are a number of tools, methods and techniques, especially from the perspective of business intelligence with prominent aspects of their development, the aspect of measurement and analysis of process performance. The purpose of this paper is...
Article
Full-text available
The business environment is rapidly changing and puts pressure on enterprises to find effective ways to survive and develop. Since it is almost impossible to identify the multitude of complex conditions and business risks, an organization has to build its resilience in order to be able to overcome issues and achieve long term sustainability. This p...
Article
Full-text available
In this paper, an extended multi-regression model for determining strength relation among dimensions of sustainable development and quality of life in section of communal services in urban areas is developed. The relative importance of dimensions of sustainable development is stated by pairwise comparison matrix. The values of dimensions of sustain...
Article
Full-text available
The performance evaluation of business processes in uncertain environments has important consequences for investors, stakeholders and has critical importance for the improvement of business processes, which is one of the requirements of ISO 9001. In this paper, a new fuzzy model is proposed for evaluation and improvement of process quality. The fuz...
Article
Full-text available
In this article, a novel approach for assessment and ranking of maintenance process indicators as well as maintenance cost indicators and maintenance equipment indicators using the fuzzy sets approach and genetic algorithms is presented. Weight values of these indicators are defined using the experience of decision makers from analyzed small and me...
Article
In this paper, the production process is decomposed for typical manufacturing small and medium sized enterprises (SMEs) and the metrics of the defined sub processes, based on the requirements of ISO 9001:2008, are developed. The weight values of production process performance indicators are defined, using the experience of decision makers from the...
Article
Full-text available
The aim of this study is to propose a fuzzy multi-criteria decision-making approach (MCDM) to evaluate the artificial hip prosthesis suppliers with respect to numerous criteria, simultaneously, taking into account the type of each criteria and its relative importance. The fuzzy of the Technique for Order Preference by Similarity to Ideal Solution (...
Article
Full-text available
In order to improve the quality of their processes companies usually rely on quality management systems and the requirements of ISO 9001:2008. The small and medium-sized companies are faced with a series of challenges in objectification, evaluation and assessment of the quality of processes. In this paper, the strategy process is decomposed for one...
Article
The concept of web laboratories with remotely controlled laboratory set ups or virtual laboratories with different simulations have an important role in engineering education and training. This paper presents an evaluation of the fundamental objectives of laboratories for distance education, comparing the effectiveness of a remotely controlled appr...
Conference Paper
Full-text available
In this paper, we will present an approach for assessment and ranking of maintenance process performance indicators using the fuzzy set approach and genetic algorithms. Weight values of maintenance process indicators are defined using the experience of decision makers from analysed SMEs and calculated using the fuzzy set approach. In the second ste...
Conference Paper
Full-text available
Each portfolio technology is changing with including new, exit old and changing the share according new needs and its satisfying. Recycling technologies have the some basic logic but some differences, depend on object (group of products), initial state of in into production and rate of expanding the needs and requests. It needs to develop appropri...

Questions

Questions (2)
Question
Hello,
I have used NNA toolbox in MatLab and created neural network with two layers. First layer (with three neurons) uses tansig, and secon layer (with one neuorn) pureline transfer function. So, my transfer equation for the complete NN should look like this:
O=pureline(W2*tansig(W1i*Xi+B1)+B2)
Where O - represents the output, W2-weight vector of the second layer neuron, B2 - bias of the second layer neuron, W1i-weight vector of the first layer neuron, B1 - bias of the first layer neuron, and Xi - input values vector for the first layer neurons.
But when I want to use this equation, I do not get the same results as the NN outputs. Also, I have used normalized and non-normalized input values in the equation, and obtained results are not same as NN outputs in both cases.
My question is whether the equation is correct or whether it is missing something?
Question
What is the most simple explanation to determine the difference between taxon and its opposite?

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Projects

Projects (6)
Project
The development of a smart pet toothbrush with a unique set of features (variable heads, bristles with different flavours, NFC communication), and a complimentary mobile app that connects users and veterinarians. The practical, cost-efficient and eco-friendly solution, backed up by research studies, with distinctive technology that reduces plaque accumulation, and bad breath in dogs, as an alternative to expensive veterinary procedures.
Project
Overall objective: Strengthening the sustainability and competitiveness of SMEs through interventions contributing to improvement of processes and quality of products and/or services. Specific objective(s): To increase sustainability and competitiveness of SMEs in Central Serbia and implement relevant quality control systems through pilot support program provisioned by BIC Kragujevac and partners