Faculty Of Technical Sciences Research Articles

Osobine ličnosti, samopoštovanje i menstrualni ciklus kao korelati impulsivnosti potrošača i žaljenja

The paper examines consumer impulsiveness and post-purchase dissonance among female students as well as their relationship with personality traits, self-esteem and menstrual cycle. The study involved 253 female students pursuing Bachelor's, Master's and PhD degrees at the Faculty of Economics, Faculty of Medicine, Faculty of Law, Faculty of Philosophy, Faculty of Technical Sciences and Faculty of Arts of the University of Priština in Kosovska Mitrovica. The instruments used in the study were the impulsiveness scale, the consumer regret scale, and the self-esteem scale. The analysis indicated that these are highly reliable instruments whose items can be regarded as homogeneous and representative. The results obtained show that consumer impulsiveness among the female students is at an average level, whereas the post-purchase regret is at a lower level compared to the theoretical average. In addition, a positive correlation was found between consumer impulsiveness and neuroticism, while self-esteem has a negative correlation with consumer impulsiveness and is its significant predictor. On the other hand, there is a negative relationship between post-purchase regret and cooperativeness, conscientiousness, openness to experience, and self-esteem. Conscientiousness and self-esteem can also be identified as predictors of post-purchase regret among female students, with self-esteem having a greater independent contribution.

The Extended Information Systems Success Measurement Model: e-Learning Perspective

This study investigated the crucial factors for measuring the success of the information system used in the e-learning process, considering the transformations in the work environment. This study was motivated by the changes caused by COVID-19 witnessed after the shift to fully online learning environments supported by e-learning systems, i.e., learning emphasized with information systems. Empirical research was conducted on a sample comprising teaching staff from two European universities: the University of Novi Sad, Faculty of Technical Sciences in Serbia and the Polytechnic Institute of Castelo Branco in Portugal. By synthesizing knowledge from review of the prior literature, supported by the findings of this study, the authors propose an Extended Information System Success Measurement Model—EISSMM. EISSMM underlines the importance of workforce agility, which includes the factors of proactivity, adaptability, and resistance to change, in the information system performance measurement model. The results of our research provide more extensive evidence and findings for scholars and practitioners that could support measuring information system success primarily in e-learning and other various contextual settings, highlighting the importance of people’s responses to work environment changes.

IEEE IAS/IES/PELS Serbia Joint Chapter Organizes Ph.D. Students Workshop

On 16 December 2022, the IEEE Industry Applications Society (IAS)/Industrial Electronics Society (IES)/Power Electronics Society (PELS) Serbia Joint Chapter organized and hosted the first Ph.D. students workshop with the topic “Research Trends in Power Engineering, Power Electronics, and Applied Computing at the Faculty of Technical Sciences” and consisted of short presentations and extensive discussions. The goal was to bring doctoral students together and to show the latest directions for their research.

Jezik diskusionih foruma na relacijama student-student i student-sadržaj

Discussion forums, as a form of asynchronous communication, represent an auxiliary tool in teaching that helps students to be involved in a discussion on a given topic, regardless their obligations, level of knowledge of a foreign language, or inhibitions when expressing themselves in a foreign language. The aim of the paper is to analyze two relationships in asynchronous communication: student-student (interpersonal register) and student-content (subject register), as well as the linguistic characteristics of discussion forums (media register). The paper will analyze the frequency of personal forms (first and second person singular and plural), shorter forms of auxiliary verbs and negation, passive, nominalization, as well as the sentence structure complexity in discussion forums created during the course in English for Professional Purposes, in the field of computing, at the Faculty of Technical Sciences in Novi Sad. Additionally, the analysis will be supplemented by the analysis of emoticons and abbreviations, since they form an indispensable part of the Internet language. All analyzed elements were present in two analyzed corpora, although with significant differences in frequency. In the corpus related to the student-student relationship, a greater use of personal forms, a greater degree of interactivity in the text, a large representation of shorter forms of auxiliary verbs and negation, a simpler sentence structure, as well as a greater use of abbreviations and emoticons were observed. It can be concluded that the analyzed corpus in the student-student relationship is more similar to oral discourse - it has the characteristics of everyday speech. In the student-content corpus, on the other hand, the sentences are longer and more complex with a large number of nominalizations and a smaller number of personal forms, while the use of the passive voice is very frequent, which indicates a focus on the text, but also distancing from the text and the object of communication. These features make the analyzed corpus in the student-content relationship more similar to a written discourse, i.e., a more scientific text. Finally, the paper concludes that the language of discussion forums depends on the very context in which communication takes place.

ANALYSIS AND MONITORING THE NETWORK TRAFFIC IN THE PROCESS OF CONNECTING TO INDUSTRIAL SIEMENS CONTROLLERS

In this paper analysis and monitoring of network traffic in the process of connecting to industrial Siemens controllers in the Faculty of Technical Sciences is made.

Symmetry in Shape and Symmetry in Motion of Digital 3D Characters

This paper presents some examples of symmetry and asymmetry in the geometry of 3D digital character, as well as in its movement. This is one of the topics studied in the Computer Graphics studies, which have existed for 11 years at the Faculty of Technical Sciences at the Uni- versity in Novi Sad. The first goal of this paper is to show how to create a 3D digital character, which consists of a surface called Mesh that connects to a system that allows the movement of that character, and that the system consists of a bone system with associated controls and is called a rig. The character is most often created using symmetry, namely, a mesh of one half of the character is created and then the other half of the character is obtained by creating a symmetrical half, and the plane of symmetry is a vertical plane that halves the character. The second goal is to show that the 3D character created in this way can be geometrically symmetric or asymmetric. The next goal is to show how symmetric or asymmetric character creates body movement or facial expression. The main goal is to emphasize the need to use asymmetric characters in 3D animation, as well as the motive for this, which emphasizes the fact that ideal symmetry in humans does not actually exist. Also, asymmetry gives us far more opportunities to create interesting differences in 3D characters.

Non-ICT Students’ Familiarity with Basic Internet Services and Tools at the Faculty of Philosophy at the University in Novi Sad

The aim of this study was to collect and analyse data about the prior knowledge that freshmen at the Faculty of Philosophy at the University of Novi Sad, Serbia, have about basic concepts in computer and information literacy. The results can be used for a better adaptation of teaching to take into account the knowledge that students have accumulated during their primary and secondary education. The study relied on an anonymous testing of respondents’ knowledge. The questions encompassed two base ECDL modules: the essentials of computer and Internet use. The test was completed by more than 500 students from 13 departments at the Faculty of Philosophy, one group from the Faculty of Management and one group from the Faculty of Technical Sciences. This paper analyses the students’ answers to the questions regarding their knowledge of Internet services and tools. The results reveal significant deficiencies in their knowledge in this area.

USING VMWARE VSPHERE HYPERVISOR ESXI 6.5.0 FOR VIRTUALIZATION OF THE OPERATING SYSTEM KALI LINUX (64- BIT) FOR EDUCATIONAL PURPOSES IN THE FACULTY OF TECHNICAL SCIENCES

In this paper using VMware vSphere hypervisor ESXi 6.5.0 for virtualization of the operating system Kali Linux (64-bit) for educational purposes in the Faculty of Technical Sciences is made.

VIRTUALIZATION OF THE OPERATING SYSTEM MICROSOFT WINDOWS 10 (64-BIT) VIA VMWARE VSPHERE HYPERVISOR ESXI 6.5.0 FOR EDUCATIONAL PURPOSES IN THE FACULTY OF TECHNICAL SCIENCES

In this paper virtualization of the operating system Microsoft Windows 10 (64-bit) via VMware vSphere Hypervisor ESXi 6.5.0 for educational purposes in well-equipped laboratories at the Faculty of Technical Sciences at the Konstantin Preslavsky University of Shumen is made.

Alternative concept in structural analysis education-AxisVM® X6 FEM software

One short review on the preferable concept in Structural Analysis education by use of finite element method (FEM) software is given. It is generally accepted that good “educationally aided” FEM software includes a pre-processor with intuitive graphically user interface that enable simple and efficient geometrical modelling of structural topology, powerful solverprocessor with sophisticated numerical modelling possibilities, post-processor with various types of analysis results presentation, as well as benefit of fast, easy training and satisfaction of use.Hungarian software company “InterCAD” developed FEM software AxsVM® that satisfies mentioned conditions and much more performances in professional and scientific area. Therefore AxisVM® is embedded in a curriculum of subject “FEM Modelling in Structural Analysis” on Department of Civil Engineering and Geodesy, Faculty of Technical Sciences, University in Novi Sad, Serbia.

Building engineering issues in Architectural education in Poland, in context of actual Ministry of Science and Higher Education Regulations

The article presents the curriculum for architectural studies in the context of technical courses, such as building engineering, structures, materials science and building physics. The authors of the publication compare the method of conducting these courses and their participation in the entire study program on the example of selected Polish universities (Faculty of Architecture of the Wrocław University of Science and Technology, Faculty of Architecture and Building Engineering of the Lublin University of Technology and the Faculty of Technical Sciences, University of Applied Sciences in Nysa). Authors of the article present changes that have occurred in the curriculum of these courses before and after the reform of higher education from 2019, what impact it has on the education of future architects, and what new opportunities these changes offer will be analyzed.

Artificial Neural Network Model for Prediction of Students’ Success in Learning Programming

This paper presents the model for predicting students’ success in acquiring programming knowledge and skills. In order to collect the data needed for development of the model, 159 undergraduate IT students from Faculty of Technical Sciences in Čačak were tested. Other relevant data were also gathered for each student: high school, the subject he/she took at the entrance exam, size of student’s birthplace, average high school grade, points from high school, gender, previous education, existence of IT educational profile in high school, study year, percentage of attendance on classes, reason for enrolment, subjective assessment of preparedness for programming, solving sequential tasks, type of programming student prefers, subjective assessment of preparedness for working in industry, solving tasks with branching and cycle, solving complex tasks, knowledge level, formal education, informal education, Kolb's learning style. Based on the results about the relevance of the parameters, the model reached an accuracy of 92.3%. In order to facilitate the use of the created model, a Web-based application for displaying the results were created. The application was primarily created for teachers with no experience in working with neural networks, who can use it for planning the teaching process based on prediction of students’ performance.

Direktne metode za određivanje čvrstoće ljuske jaja

During the manipulation of hen eggs from the farm to the consumer due to action of external forces and weak mechanical strength of shell, the eggs break. The goal of egg producers is to reduce losses when breaking eggs during the production and placement, and thus increase revenues. Each egg can be damaged by external forces whose values are greater than maximum strength of the egg shell. Direct and indirect methods are used to determine the quality of eggs and shell strength. By direct methods, strength of the shell can be determined on the basis of puncture force measurements, impact forces, quasi-static compression forces and free fall forces on a known surface. In our research, a device was constructed for the realization of experiment and a direct method for determining strength of eggs was applied on the basis of measured breaking force of the shell. The device for measuring strength of eggs by the direct method of puncture eggshell was constructed and applied at the Faculty of Technical Sciences and the Faculty of Agronomy in Čačak. Class "M" hen eggs produced on the "Grbović" farm in the vicinity of Čačak were used in the research. The laying hens are a 41-week-old Isa Brown hybrid. During the research, physical characteristics of hen eggs were determined: length, width, index of shape and weight of eggs, as well as weight of the shell, share of the shell in the total mass of eggs, thickness and puncture force of the shell. The results of research show that the length of egg is 57.00 mm, width 44.59 mm with a coefficient of variation from 2.7 to 1.4%. The thickness of egg shell is on average 0.39 mm, in range from 0.377 to 0.416 mm. The share of shell is 10.54% of average weight of eggs (62.43 g). The quality of the tested eggs was quite uniform because the puncture force of egg shell ranged from 20.35 to 23.97 N. The research results are important for cage construction, design of egg collection equipment, design of egg packaging, and applicable in selection for obtaining new genotypes of laying hens with increased resistance to egg breaking.

Nova udobnost - ka životu nakon pandemije

Recent periods in global history have put some heavy strains on the human condition. Changes in living have subsequently led to spontaneous bottom-up adjustments of housing units. During 2020 and 2021 the definition of spatial features of these changes has been the main objective of three Master's course workshops at the Department of Architecture and Urban Planning, Faculty of Technical Sciences, Novi Sad. Results of those workshops served as a pool of solutions for the research that followed. Using obtained data, abstract diagrams of architectural functionality are transcribed. They are applied to an algorithm and computer software that implements the algorithm, which has produced a wide range of spatial solutions. Both analytical and numerical approaches to the produced solutions, with additional criteria that have been applied and tested against some well-known theoretical thoughts from recent history, provide an insight into the possible future of multifamily housing.

Prilog inovacijama u oblasti mikroprocesorskih sistema - evaluacija upotrebe SIMRA simulatora u nastavi

This paper describes and evaluates an application which provides the simulation of the functioning of the central processor (CPU). The simulation provides visual representation of anything occurring both at the level of arithmetic logic units (ALU) for different arithmetic and logical operations and at the level of bits. The evaluation of the application of this simulator in teaching was also conducted. The sample included 95 students from the Faculty of Technical Sciences in Čačak, study program - Information Technologies. The method with parallel groups was applied in this research. One group of students mastered the contents of the ALU in traditional way of teaching, while the other group used the simulator. Their advancement in ALU knowledge was measured by knowledge test specially designed for this research. In the end, the students of both groups evaluated the use of the simulator in teaching. The results of the research showed that students who studied with simulators were more motivated and achieved better results than students who learned the same content in a traditional way.

A Long-Term Condition Monitoring and Performance Assessment of Grid Connected PV Power Plant with High Power Sizing Factor under Partial Shading Conditions

Partial shading conditions of photovoltaic (PV) modules often occurs in urban areas leading to losses in electricity power generation of the PV power plant. The purpose of this study is to present how the PV power plant with high value of inverter power sizing factor (Kinv) can achieve high performance and power production under partial shading conditions with high shading losses. In this paper the results of long-term monitoring, performance analysis and experimental results are presented, while the results are compared to the estimated values calculated using PVsyst software. The study focused on the PV power plant at the Faculty of Technical Sciences (FTS) in Novi Sad, Republic of Serbia, for the period between the years 2012 and 2019. It has been shown that the values of PV power plant performance parameters are better than expected (very high), and resemble the power plants operating without shading. The high value of the inverter power sizing factor may lead to occasional saturation of the inverter when certain conditions are met, but most of the times it allows the inverter to operate at a more optimal power level. PV module soiling and power degradation is within the limits mentioned in the literature. The increase in Kinv in the partial shading conditions favorably affects the performance, does not degrade the efficiency of the inverter at saturation, reduces the effect of soiling and aging of PV modules, leading to higher power production.

Pedestrian Throw Distance Prediction from Vehicle Damage Intensity

One of the main points to be addressed when analysing vehicle-pedestrian collisions is the vehicle impact speed. If the traffic accident is not recorded on camera, and there are no skid marks nor tachograph in the vehicle, the parameter is determined on the basis of empirical models. All empirical models for ascertaining vehicle speed are based on the pedestrian throw distance, which is not always known because of an unidentified vehicle-pedestrian collision point or the final rest position of the pedestrian after collision. This paper shows a description of a vehicle damage recorded in an ordinal scale and determines the pedestrian throw distance prediction model from the vehicle damage established in such a way. If the accident scene is documented by photographs, the damage can be classified, and by applying a validated model, the pedestrian throw distance envisaged. Then, by applying an empirical model, one can determine the speed of the vehicle at the time of collision with a pedestrian. Two databases were formed during the research. The first is based on real-life traffic accidents (expert witnessing of the professors from the Faculty of Technical Sciences). The second is based on traffic accident simulations as part of PC Crash software package.

Aspect-based sentiment analysis of reviews in the domain of higher education

PurposeStudent recruitment and retention are important issues for all higher education institutions. Constant monitoring of student satisfaction levels is therefore crucial. Traditionally, students voice their opinions through official surveys organized by the universities. In addition to that, nowadays, social media and review websites such as “Rate my professors” are rich sources of opinions that should not be ignored. Automated mining of students’ opinions can be realized via aspect-based sentiment analysis (ABSA). ABSA s is a sub-discipline of natural language processing (NLP) that focusses on the identification of sentiments (negative, neutral, positive) and aspects (sentiment targets) in a sentence. The purpose of this paper is to introduce a system for ABSA of free text reviews expressed in student opinion surveys in the Serbian language. Sentiment analysis was carried out at the finest level of text granularity – the level of sentence segment (phrase and clause).Design/methodology/approachThe presented system relies on NLP techniques, machine learning models, rules and dictionaries. The corpora collected and annotated for system development and evaluation comprise students’ reviews of teaching staff at the Faculty of Technical Sciences, University of Novi Sad, Serbia, and a corpus of publicly available reviews from the Serbian equivalent of the “Rate my professors” website.FindingsThe research results indicate that positive sentiment can successfully be identified with the F-measure of 0.83, while negative sentiment can be detected with the F-measure of 0.94. While the F-measure for the aspect’s range is between 0.49 and 0.89, depending on their frequency in the corpus. Furthermore, the authors have concluded that the quality of ABSA depends on the source of the reviews (official students’ surveys vs review websites).Practical implicationsThe system for ABSA presented in this paper could improve the quality of service provided by the Serbian higher education institutions through a more effective search and summary of students’ opinions. For example, a particular educational institution could very easily find out which aspects of their service the students are not satisfied with and to which aspects of their service more attention should be directed.Originality/valueTo the best of the authors’ knowledge, this is the first study of ABSA carried out at the level of sentence segment for the Serbian language. The methodology and findings presented in this paper provide a much-needed bases for further work on sentiment analysis for the Serbian language that is well under-resourced and under-researched in this area.

Student Performance on an E-Learning Platform: Mixed Method Approach

E-learning is considered a leading application of digital technologies in educational systems. The aim of the paper is to explore the utilization and impact of digital technologies on an e-learning platform. For this purpose, research was conducted at the Moodle learning management system. Data from the e-learning platform were empirically evaluated in order to find key indicators of student performance in different courses. Student success with the e-learning system was evaluated using a mixed-method: Social Network Analysis, K-Means Clustering, and Multiple Linear Regression. The research was conducted at the University of Novi Sad, Faculty of Technical Sciences, Serbia. The results indicate a significant relationship between the performance of students and the use of digital educational resources from the e-learning platform.

Šezdeset godina školovanja mašinskih inženjerki u Vojvodini

This paper aims to analyze the participation of the female population in mechanical engineering, to study the motives for their commitment to these studies, their status with respect to the majority male population, and the fulfillment of expectations by the profession. The number of candidates who defended their doctoral dissertations at the Faculty of Technical Sciences in Novi Sad from the date of its establishment to the present (60 years in total) was examined. Special attention was paid to the problem of female professors working in education of the mechanical engineers. The numerical indicator of the participation of the female population of mechanical engineers in relation to the male mechanical engineers at the Faculty of Technical Sciences is devastating, and it is concluded that appropriate action must be taken. Measures that are thought to contribute to the increase in the number of women mechanical engineers in Vojvodina and throughout Serbia are proposed.