University of Sarajevo
  • Sarajevo, Bosnia and Herzegovina
Recent publications
The paper presents a phasor estimator combining Prony’s method and discrete analytic signal generation for use in impedance-based fault location. The precision of impedance-based fault location hinges on accurately extracting the fundamental component in the presence of transient components, including inter-harmonics, which compromises the accuracy of the industry-adopted full-cycle Discrete Fourier Transform (DFT) method. The analytic signal gives rise to half the model order, excluding the purely damped exponential, thus producing more accurate results from Prony’s process while also contributing to its speedup. The discrete analytic signal is generated so that its length is half of the original signal, meaning its sampling frequency is effectively halved, yielding better numerical conditioning and faster processing in Prony’s method. The proposal does not trade accuracy for speed, yet the speed up makes fault location closer to the vision of installing its software module on protection devices. The proposed Prony’s method with discrete-time analytic signals is compared with the classical Prony’s method applied to discrete-time real-valued signals, the full-cycle DFT with special provisions for eliminating the decaying DC component, and Kung’s method. The results obtained by the different approaches show the superiority of Prony’s method when combined with analytic signal generation.
Purpose Ever since Leo Kanner first described autism in 1943, the research in this field has grown immensely. In 2021 alone, 5837 SCOPUS indexed documents were published with a title that contained the words: “autism”, “autistic”, or“ASD”. The purpose of this study was to examine the most common topics of autism research in 2021 and present a geographical contribution to this research. Methods We performed a content analysis of 1102 abstracts from the articles published in 11 Autism journals in 2021. The following journals, indexed by the SCOPUS database, were included: Autism, Autism Research, Molecular Autism, Journal of Autism and Developmental Disorders, Research in Autism Spectrum Disorders, Focus on Autism and Other Developmental Disabilities, Education and Training in Autism and Developmental Disabilities, Review Journal of Autism and Developmental Disorders, Advances in Autism, Autism and Developmental Language Impairments, and Autism in Adulthood. Results According to the analysis, the main research topics were: mental health, social communication, social skills, quality of life, parenting stress, ADHD, Covid-19, self-efficacy, special education, and theory of mind. In relation to geographic distribution, most studies came from the USA, followed by the UK, Australia, and Canada. Conclusion Research topics were aligned with the priorities set by stakeholders in autism, most notably persons with autism themselves and their family members. There is a big gap in research production between developed countries and developing countries.
In this paper we studied the diet in four allopatric populations of alpine salamanders in the Dinarides ( Salamandra atra prenjensis ). Food consumption was assessed by stomach flushing while food availability by pitfall traps and netting. We aimed to: (i) assess the realized dietary niche, (ii) investigate prey preferences, (ii) explore individual specialization, clustering and nestedness. All populations have an equally wide dietary span that is among the largest reported for terrestrial salamanders. On the other hand, the amount of ingested prey is rather low compared to other salamander species; the quantity of consumed prey did not differ among populations but younger individuals fed more than adults. Food composition somewhat differed among populations but not among sex/age classes. In all four populations, the bulk of diet consisted of beetles, spiders, snails and millipedes; except for beetles, such prey was also preffered together with centipedes and isopods. For most of the prey categories, the direction of the electivity indices was the same across populations. In none of the populations a nested pattern in the interindividual subdivision of dietary resources was registered. However, indications for individual specialization and modularity were observed disclosing that the broad niche of populations is composed of smaller individual niches that cluster along the dietary axis. Overall, the four populations have very similar structural characteristics of the dietary niche and there is little evidence for local dietary differentiation probably due to the absence of drivers for change.
Air pollution, recognized as a human carcinogen, is a significant cause of death in industrial and developing countries, and Bosnia and Herzegovina (B&H) is one of the leading countries for air pollution—caused death rate and has the poorest urban air quality in Europe. Despite a population decrease, urban air pollution in B&H has increased due to traffic pollution and still intensive use of solid fuel for heating and cooking. Human biomonitoring studies, regarding the described air pollution, have not been conducted before, and particularly have not been conducted in the region of Sarajevo. Good health, well-being, and environmental protection are part of the 17 defined Sustainable Development Global Goals. Accordingly, this study aimed to determine baseline levels of DNA damage in a group of Sarajevo citizens and to compare seasonal variations in DNA damage in relation to the reported levels of air pollution. From 33 individuals included in the study, samples were collected in the summer and winter seasons. The buccal micronucleus cytome (BMCyt) assay and comet assay in leucocytes isolated from saliva were performed. Mean values and standard deviations of log-transformed tail intensity (%), tail length (µm), and tail moment results in winter were 1.14 ± 0.23, 2.20 ± 0.14, and 1.03 ± 0.29, respectively, while in the summer season those values were 1.19 ± 0.19, 2.25 ± 0.17, and 1.07 ± 0.25, respectively. No significant differences were found for the comet assay parameters. Nevertheless, BMCyt results showed significant increases in micronuclei (P = .008), binuclear cells (P = .04), karyolysis (P = .0003), condensed chromatin (P = .03), and pyknosis (P = .002) in winter. Although the results of comet and BMCyt assays are not in accordance, this study contributes to the human air pollution biomonitoring in Sarajevo, B&H, and based on the genotoxic effects of air pollution evidenced by the BMCyt biomarker further studies of this kind are necessary.
Background: As the pandemic time went by in Bosnia and Herzegovina (B&H), various patterns toward COVID-19 itself and its impacts, implementation of prescribed preventive measures among the team members, and those of their patients, including immunization process, have been revealed. These patterns were of both empirical and evidence-based kind and consequently formed dental personnel behavior. The aim was to evaluate and compare the COVID-19 status of dentists in B&H, implementation of prescribed preventive measures, and usage of various kinds of PPE, at the beginning of the pandemics and now, 2.5 years later, including dentists' current vaccination status, and their opinions and attitudes toward the national COVID-19 economic impact on dental practice. Methodology: Study research was in a form of a cross-sectional longitudinally designed online survey and was conducted in two parts. Results and conclusions: Dental professionals in B&H had a high frequency of COVID-19 symptoms in the second pandemic year. The vaccination status of dentists in B&H was in line with the global average values of vaccinated professionals. Dentists used patient management preventive measures and PPE recommended by WHO, but some preventive measures have been changed and prioritized recently. The economic impact of pandemics on dentistry was predominantly negative.
The SARS-CoV-2 infection causes COVID-19, which has affected approximately six hundred million people globally as of August 2022. Organs and cells harboring angiotensin-converting enzyme 2 (ACE2) surface receptors are the primary targets of the virus. However, once it enters the body through the respiratory system, the virus can spread hematogenously to infect other body organs. Therefore, COVID-19 affects many organs, causing severe and long-term complications, even after the disease has ended, thus worsening the quality of life. Although it is known that the respiratory system is most affected by the SARS-CoV-2 infection, many organs/systems are affected in the short and long term. Since the COVID-19 disease simultaneously affects many organs, redesigning diagnostic and therapy policies to fit the damaged organs is strongly recommended. Even though the pathophysiology of many problems the infection causes is unknown, the frequency of COVID-19 cases rises with age and the existence of preexisting symptoms. This study aims to update our knowledge of SARS-CoV-2 infection and multi-organ dysfunction interaction based on clinical and theoretical evidence. For this purpose, the study comprehensively elucidates the most recent studies on the effects of SARS-CoV-2 infection on multiple organs and systems, including respiratory, cardiovascular, gastrointestinal, renal, nervous, endocrine, reproductive, immune, and parts of the integumentary system. Understanding the range of atypical COVID-19 symptoms could improve disease surveillance, limit transmission, and avoid additional multi-organ-system problems.
Because quantum key distribution is a technology for establishing keys for symmetric encryption (preferably one-time pads, but more practically keys for AES or other conventional symmetric cryptography), end-to-end confidentiality or authentication requires a deeper look into network structure and comes with additional assumptions.
Establishing secure cryptographic keys through an untrusted network is a fundamental cryptographic task. While the use of public key infrastructure based on computational intractability assumptions prevail, these solutions remain theoretically breakable. They are under constant threat as computational power continues to increase, new algorithms are discovered and new computing architectures become available.
The basis of all modern networks is device which is able to manage and control network traffic. The fundamental network device is a router that connects at least two networks and has traffic directing functions. From a logical point of view, a router is the intersection of links forming a network. Its task is to accept incoming packets, analyze destination addresses, consult with its internal information how to process packets, and apply specified actions (discard it or eventually direct it to outgoing link).
We review the latest developments in Fiber-optic Telecommunications and Networks presented at OFC 2022 and compare the progress accomplished since the previous year conference, OFC 2021. In particular, we note this year’s emphasis on the application of Neural Networks (NN) as part of Artificial Intelligence (AI) and Machine Learning (ML), as well as continued research in quantum communications and key distribution. We also expect future conferences to include papers about optical variants of quantum computers, a field of great interest that can exploit many quantum systems, as well as papers on continuing developments in High-Speed Communications beyond 800 Gb/s, and increased use of coherent modulation and detection in Data Centers Interconnect, Cloud and Edge computing, the latter in support of 5 G Internet Of Things (IOT).
It is very complicated to give correct answer to the question “How to define human life?” Nowadays dilemmas consider the respect of human life from the birth to death involve not just biology but also other sciences like philosophy, theology, sociology, psychology, law and politics. These sciences evaluate the topic from different points of view. Integration of all of these perspectives could result with a proper definition. The principal purpose of this paper is to try to determine when a human individual begins. If this proves to be too difficult, we might have to settle for a specific stage in the reproductive process before which it would be impossible to say with any plausibility that a human individual exists. It is necessary to return the moral dimension of observation to the science of life. The point is to reconcile the universal ethical principles concerning the absolute value of life with the everyday challenges and dilemmas. It is our deepest conviction that life has an absolute value and that there always remains something indestructible and substantial in life, which may neither be evaluated by anything final, nor completely reduced to the material biological equivalent and the genetic substratum.
Moralni zakon je čisti postojeći fakat našeg uma i njega ništa izvanjsko ne uvjetuje, ne uslovljava. Taj univerzalni zakon kad se naredi i kad se primijeni je nadređen našoj ‘sreći’ ili ‘nesreći’, daleko od današnje pragmatske forme moraliziranja i njegova relativiziranja kako svako ponaosob ima svoj osobni, lični, ego-moral koji se ne osvrće ni na koji univerzalni princip. Da bi mogli osjetiti takav čisti unutarnji moralni zakon kao ljudska bića moramo biti slobodna bića i bića koja vjeruju u svoju besmrtnost, duše kao takve. Današnje doba nikad snažnije nije opovrgavalo ovo čisto kantovsko utemeljenje Sulejmanpašićeva rezona da bi se istinski začudio da se odnekud pojavi i ugleda projekte u društvu medija koji zagovaraju i ‘prave’ tehničku besmrtnost za postojećeg materijalnog čovjeka…
This article examines the long-term effects of war exposure on generalized trust and risk attitudes 20 years after the conflict in Bosnia and Herzegovina. Our study goes beyond the destruction of physical and human capital and investigates the effects of war exposure on psychological preferences and beliefs, as well as their mutual relationship and determinants. Our empirical strategy employs a nationally representative survey and an endogenous Seemingly Unrelated Model. We discover that individuals living in municipalities with greater war fatalities report significantly higher distrust in people and simultaneously express greater risk aversion. Moreover, there is a mutually endogenous and strong positive relationship between the two dependent variables, whereby greater trust is associated with greater risk-seeking. Consequently, our results demonstrate that the tragic consequences of war are not only confined to negative socio-economic outcomes but also leave a lasting impact on the psychological preferences of people that experienced it.
We consider the percolation model with nucleation and simultaneous growth of multiple finite clusters, taking the initial seed concentration ρ as a tunable parameter. Growing objects expand with constant speed, filling the nodes of the triangular lattice according to rules that control their shape. As growing objects of predefined shape, we consider needle-like objects and “wrapping” objects whose size is gradually increased by wrapping the walks in several different ways, making triangles, rhombuses, and hexagons. Growing random walk chains are also analyzed as an example of objects whose shape is formed randomly during the growth. We compare the percolation properties and jamming densities of the systems of various growing shapes for a wide range of initial seed densities ρ<0.5. To gain a basic insight into the structure of the jammed states, we consider the size distribution of deposited growing objects. The presence of the most numerous and the largest growing objects is recorded for the system in the jamming state. Our results suggest that at sufficiently low seed densities ρ, the way of the object growth has a substantial influence on the percolation threshold. This influence weakens with increasing ρ and ceases near the value of the site percolation threshold for monomers on the triangular lattice, ρp∗=0.5.
This paper examines the local syntax in 65 articles from the British mid-market tabloids, the Daily Mail and the Daily Express , covering the pre-Brexit vote period (February-June 2016). The paper focuses on the passive constructions in the chosen corpus and the main objective is to examine their role and function in a traditionally conservative and anti-EU discourse through an analysis of the sampled data set within the qualitative theoretical and methodological framework of CDA. The results point at an intricate network of both agentless and passives with agents contributing to both positive self-presentation and negative other-presentation as the dominant strategies of manipulation in the examined discourse. This paper is part of the AILA Europe special issue.
We investigated the production conditions and optoelectrical properties of thin film material consisting of regularly ordered core/shell Ge/Al and Ge/Si3N4/Al quantum dots (QDs) in an alumina matrix. The materials were produced by self–assembled growth achieved by means of multilayer magnetron sputtering deposition. We demonstrated the successful fabrication of well-ordered 3D lattices of Ge/Al and Ge/Si3N4/Al core/shell quantum dots with a body-centred tetragonal arrangement within the Al2O3 matrix. The addition of shells to the Ge core enables a strong tuning of the optical and electrical properties of the material. An Al shell induces a bandgap shift toward smaller energies, and, in addition, it prevents Ge oxidation. The addition of a thin Si3N4 shell induces huge changes in the material spectral response, i.e., in the number of extracted excitons produced by a single photon. It increases both the absolute value and the width of the spectral response. For the best sample, we achieved an enhancement of over 250% of the produced number of excitons in the measured energy range. The observed changes are, as it seems, the consequence of the large tensile strain in Ge QDs which is induced by the Si3N4 shell addition and which is measured to be about 3% for the most strained QDs. The tensile strain causes activation of the direct bandgap of germanium, which has a very strong effect on the spectral response of the material.
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2,706 members
Ahmed Novo
  • Medical Informatics
Jasmin Terzic
  • Faculty of Mechanical Engineering, Defense Technologies Department
Suvad Lelo
  • Faculty of Mathematics and Natural Sciences
Irzada Taljic
  • Faculty of Agriculture and Food Science
J. Jurkovic
  • Faculty of Agriculture and Food Science
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Obala Kulina Bana br 7/II , 71 000 , Sarajevo, Bosnia and Herzegovina
Head of institution
Prof. Dr. Rifat Škrijelj-RECTOR
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www.unsa.ba
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+387 33 56 51 08
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