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K. Grady, M. Markus, Shu Wu, Fuyao Wang, S. Koric

In hydrology, projected climate change impact assessment studies typically rely on ensembles of downscaled climate model outputs. Due to large modeling uncertainties, the ensembles are often averaged to provide a basis for studying the effects of climate change. A key issue when analyzing averages of a climate model ensemble is whether to weight all models in the ensemble equally, often referred to as the equal‐weights or unweighted approach, or to use a weighted approach, where, in general, each model would have a different weight. Many studies have advocated for the latter, based on the assumption that models that are better at simulating the past, that is, the models with higher hindcast accuracy, will give more accurate forecasts for the future and thus should receive higher weights. To examine this issue, observed and modeled daily precipitation frequency (PF) estimates for three urban areas in the United States, namely Boston, Massachusetts; Houston, Texas; and Chicago, Illinois, were analyzed. The comparison used the raw output of 24 Coupled Model Intercomparison Project Phase 5 (CMIP5) models. The PFs from these models were compared with the observed PFs for a specific historical training period to determine model weights for each area. The unweighted and weighted averaged model PFs from a more recent testing period were then compared with their corresponding observed PFs to determine if weights improved the estimates. These comparisons indeed showed that the weighted averages were closer to the observed values than the unweighted averages in nearly all cases. The study also demonstrated how weights can help reduce model spread in future climate projections by comparing the unweighted and weighted ensemble standard deviations in these projections. In all studied scenarios, the weights actually reduced the standard deviations compared to the equal‐weights approach. Finally, an analysis of the results' sensitivity to the areal reduction factor used to allow comparisons between point station measurements and grid‐box averages is provided.

A. Džurlić, I. Omerhodžić, B. Rovčanin, F. Alagić, A. Ahmetspahić, S. Zahirović, E. Mehmedika-Suljić

BACKGROUND: Tumors of the central nervous system comprise a wide range of over 100 histological distinct subtypes with different descriptive epidemiology, clinical features, treatments, and outcomes. The presence of isocitrate dehydrogenase gene mutation 1 (IDH1) has become one of the most critical biomarkers for molecular classification and prognosis in adult diffuse gliomas. About 65–90% of patients with adult diffuse gliomas have seizures as their initial symptoms. AIM: The objective of this study was to determine the association between IDH1 mutations in adult diffuse gliomas with an incidence of symptomatic epilepsy. METHODS: The study was conducted as an observational, cross-sectional, and prospective clinically controlled study at the Clinic of Neurosurgery of the Clinical Center of the University of Sarajevo. The research included a total of 100 patients treated at the Clinic of Neurosurgery, with pathohistological confirmation of glioma Grades II–IV who were stratified by groups according to tumor grade. Data were collected on tumor localization and grade, the presence of IDH mutations, and the presence of epileptic seizures as the first symptom of the glioma. RESULTS: Out of a total of 100 patients, 39 had IDH 1 mutations, while 61 patients were without them: Of these, diffuse astrocytoma Grade II 30 cases (30%), Grade III 5 (5%), and Grade IV 7 (7%), and the number of patients with glioblastoma was 58 (58%). In the group of patients with IDH 1 mutations, epileptic seizures were present in 87.2% compared to the group of patients without IDH 1 mutations (wild type) in which epileptic seizures were present in 16.4% of cases. Statistical analysis showed that the positive mutated IDH-type carries an almost 70% increase in the likelihood of epileptic seizures (χ2 = 8.378; p = 0.0001). If we separate the group of diffuse astrocytomas in the IDH 1-positive subgroup, 34 patients (85.81%) had epileptic seizures, while in the IDH 1-negative subgroup, there were no patients with epileptic seizures, which carries a statistically significant difference in frequency in favor of IDH 1-positive tumors (p ≤ 0.001). CONCLUSION: There is a clear connection between the presence of IDH1 mutations and the occurrence of epileptic seizures in the clinical picture of patients with diffuse adult glioma.

Cilj. Cilj ovog teorijskog istraživanja jest kritički prikazati suvremene oblike pisme- nosti 21. stoljeća, specifičnosti po kojima su slični ili se razlikuju, s posebnim fokusom na medijsku pismenost kao element medijskog obrazovanja kako bi se pridonijelo stvaranju pretpostavki za oblikovanje koncepta kritičke autonomije. Komplementarnost i sinergija tih pojmova prepoznati su kao ključni čimbenici za uspješan razvoj i obrazovanje svakog pojedinca. Metodologija. U istraživanju se polazi od pretpostavke da je unaprjeđenje suvremenih oblika pismenosti ključno za razvoj društva te zahtijeva od pojedinca sustavno i organizirano stjecanje raznovrsnih kompetencija s ciljem unaprjeđenja veće razine zna- nja i obrazovanja. Stoga se istraživačko pitanje odnosi na koherentnost tih pojmova. Suvremeni oblici pismenosti trebali bi se tretirati kao srodni, komplementarni pojmovi (nikako konkurentni/suparnički), koji se sjedinjuju i nadopunjuju jedni na druge čineći tako sinergiju i zajedničko djelovanje koje za cilj ima prikupljanje novih znanja i stjecanje kompetencija u suvremenom svijetu medija, informacija i obrazovanja. Postdigitalni izazov opisuje odnos pojedinca i tehnologije, ali (bi) treba(o) uključiti i odnos etike, estetike i emocije. Za pripremu i teorijsku analizu u radu korištena je relevantna znanstvena i stručna literaturna građa, s ciljem tumačenja aktualnih suvremenih oblika pismenosti, s posebnim osvrtom na medijsku pismenost u 21. stoljeću i ukazivanja na usklađenost sadržaja i teme istraživanja. Rezultati. Rad donosi kritičku analizu suvremenih oblika pismenosti i to, u metodološkom smislu, pozicioniranih u kontekstu UNESCO-vih definicija pismenosti kao vještina koje u 21. stoljeću predstavljaju uvjet za kvalitetnije obrazovanje. Sukladno definiranim ciljevima, ovaj rad opisuje aktualne suvremene oblike pismenosti prikazujući ih kroz elementarnu, sekundarnu i tercijarnu pismenost. Predstavljena su različita tumačenja suvremenih oblika pismenosti, ističući njihove specifičnosti, s posebnim fokusom na UNESCO-vu strategiju za pismenost mladih i odraslih. Posljednji dio rada fokusiran je na ulogu medijske pismenosti kao elementa medijskog obrazovanja s ciljem da se pridonese kreiranju koncepta kritičke autonomije. U radu se zaključuje da, uz ostale suvremene oblike pismenosti, medijsko opismenjavanje nudi najbolje rezultate ako se odvija u sinergiji s drugim suvremenim i komplementarnim pismenostima 21. stoljeća. Ograničenja. Informacijsko okruženje sa sobom nosi značajne mogućnosti otkri- vanja novih kreativnih potencijala, najčešće u kontekstu razvijanja tehnologije, sociokulturnog prilagođavanja pojedinca društvu i unaprjeđenja društvenog razvoja. U isto vrijeme mnogi brzomijenjajući obrasci društvenog života, prije svega tehnološke inovacije i tržišna konkurentnost, predstavljaju izazove za društvo i pojedinca. Koncept suvremenih pismenosti, s posebnim fokusom na medijsku pismenost, prema tome, predstavlja dinamičnu i promjenjivu komponentu. Medijska pismenost proučava se kao dio procesa cjeloživotnog učenja (odnosi se na svaku aktivnost učenja tijekom cijelog života) te su vještine i kompetencije koje pojedinac stječe podložne promjenama    i uvjetovane su tehnološkim inovacijama koje uključuju nove pristupe informacijama, prijenos informacija, poruka i znanja. Iz tog razloga obrazovanje za suvremene oblike pismenosti predstavlja stalan i promjenjiv proces koji zahtijeva kontinuiranu kritičku evaluaciju tehnologije i medija, kontinuirano stjecanje novih vještina i kompetencija, ali i stvara okruženje za kreiranje novih kreativnih obrazovnih i odgojnih strategija za razumijevanje i korištenje suvremenih tehnologija i medija. Društvena vrijednost. Rad je usmjeren na kritičku analizu suvremenih oblika pismenosti i to, u metodološkom smislu, pozicioniranih u kontekstu UNESCO-ovih de- finicija pismenosti kao vještina koje u 21. stoljeću predstavljaju uvjet za opstanak i kvalitetniju čovjekovu egzistenciju. Poseban osvrt je na medijskoj pismenosti jer ta komponenta, onima koji je posjeduju, omogućuje uspješniju zaštitu njihovih zakonskih prava, sloboda i razumijevanja funkcije medija. Ako je funkcija medija i način na koji mediji stvaraju utjecaj na ljude jasnija, time se konstantno stječe veća kontrola nad tim procesom i ne dopušta se medijima da od svojih korisnika stvaraju pasivne medijske recipijente. Pri tome se ne misli da je pojedinac medijski pismen ako je sposoban primati medijske poruke jer to nužno ne znači da ih je u stanju kritički procjenjivati. Originalnost/vrijednost. Znanstveni doprinos utemeljen je na istraživanju i analizi relevantne znanstvene i stručne literature s ciljem tumačenja aktualnih suvremenih oblika pismenosti s posebnim osvrtom na medijsku pismenost. S obzirom na provedeno istraživanje i analizu, predstavljeni su relevantni čimbenici koji upućuju na to da je sinergija i komplementarnost suvremenih oblika pismenosti ključan element za unaprjeđenje obrazovanja svakog pojedinca.

Tirdad Seifi Ala, E. Alickovic, A. F. Cabrera, W. Whitmer, Lauren V. Hadley, M. Rank, T. Lunner, C. Graversen

Objective: The purpose of this study was to investigate alpha power as an objective measure of effortful listening in continuous speech with scalp and ear-EEG. Methods: Scalp and ear-EEG were recorded simultaneously during presentation of a 33-s news clip in the presence of 16-talker babble noise. Four different signal-to-noise ratios (SNRs) were used to manipulate task demand. The effects of changes in SNR were investigated on alpha event-related synchronization (ERS) and desynchronization (ERD). Alpha activity was extracted from scalp EEG using different referencing methods (common average and symmetrical bi-polar) in different regions of the brain (parietal and temporal) and ear-EEG. Results: Alpha ERS decreased with decreasing SNR (i.e., increasing task demand) in both scalp and ear-EEG. Alpha ERS was also positively correlated to behavioural performance which was based on the questions regarding the contents of the speech. Conclusion: Alpha ERS/ERD is better suited to track performance of a continuous speech than listening effort. Significance: EEG alpha power in continuous speech may indicate of how well the speech was perceived and it can be measured with both scalp and Ear-EEG.

Sifeddine Benahmed, R. Postoyan, Mathieu Granzotto, L. Buşoniu, J. Daafouz, D. Nešić

We present stability conditions for deterministic time-varying nonlinear discrete-time systems whose inputs aim to minimize an infinite-horizon time-dependent cost. Global asymptotic and exponential stability properties for general attractors are established. This work covers and generalizes the related results on discounted optimal control problems to more general systems and cost functions.

Florian Teichmann, A. Horváth, M. Luisser, A. Korjenic

Strategies to mitigate urban heat islands are a recent issue in the Austrian capital, Vienna. In this study, the uhiSolver-v2106-0.21 software was used to evaluate the summer cooling effects and humidity production of small-scale facade greening and a green pergola located in two schools within the city. Based on on-site measurement data, the study revealed that small-scale greening measures are not able to substantially reduce ambient air temperature. On a hot summer day, at 3 p.m. local time (CEST), the maximum decrease amounted to 0.3 °C at 0.1 m from the facade greening as well as inside the green pergola. As for the apparent (perceived) temperature, a reduction of up to 4 °C was observed under the green pergola compared to the unshaded roof terrace. Hence, the simulation results show that, within urban areas, a significant improvement of thermal comfort in summer can only be achieved through large-scale greenery that provides shade for pedestrians.

Davor Radivojević, Jefto Džino, Mladen Radivojević, Stefan Džino

The subject of the research is the analysis of services that should be offered by public administration toward legal entities and natural persons. We will suggest that it uses real-time intelligent IT systems based on data storage based on the data warehouse. Our opinion is that such systems implemented in the public administration of Bosnia and Herzegovina could offer an appropriate service to each user at a time when they need the service in a form that suits them, on the spot where he is in the moment of delivery and in the quantity that he needs. In order for a public administration to be able to offer an appropriate service, it must know its users much better and know which service they need at what time. In this paper, we analyze self-service as well as the necessary activities for all that. These are all activities that should be carried out in the future, and this work could contribute to the implementation of these processes.

R. Pavlović, Zhanneta Kozina

Endurance-type disciplines (running, cycling, biathlon) define the cyclic structure of an athlete's movements, which, in addition to functional parameters, also includes an adequate morphological profile and body composition. Based on the detection, analysis and evaluation of these parameters, it is possible to define the body composition of the competitors as well as possible mutual differences even though it is endurance sports. The results are all the more relevant if the profile of top athletes with notable results is being evaluated. The current case study analyzes the morphological dimensions and body composition of competitors of three different disciplines (middle and long distances, cycling, biathlon) of top-level competitors, members of national teams. The study was conducted: Uroš Gutić (UG) - runner middle and long distances, member of AK "Sarajevo" and the BIH athletic national team; Milan Milivojević (MM) – cyclist, member of Cycling club "Borac" Čačak (Serbia), and the member Serbian national team; Stefan Lopatić (SL) – biathlete, member SK "Romanija" Pale, and BIH national team.

Haris Alibašić, Christopher L. Atkinson

The individual interpretations of purchasing policies weaken fair government purchasing practices. However, this does not fully account for the nature of the media’s coverage of government contracting, taken as a whole. The authors seek to understand better framing in newspaper stories on government procurement, with the government as a force that creates opportunity and fraud. The paper focuses on an area of cognitive uncertainty in understanding portrayals of public procurement in newspaper articles as positive or negative, and, assuming a lack of balance, what interest or group do articles favor in their portrayal of this public function? Sentiment analysis of a corpus of newspaper articles focusing on government contracting was conducted. This analysis suggests that the negative perception of government contracting is reinforced and exacerbated by sensationalized media coverage, a negative impact on the policymaking process and public discourse, and public trust in government results.

Eldar Kurtic, Dan Alistarh

We revisit the performance of the classic gradual magnitude pruning (GMP) baseline for large language models, focusing on the classic BERT benchmark on various popular tasks. Despite existing evidence in the literature that GMP performs poorly, we show that a simple and general variant, which we call GMP*, can match and sometimes outperform more complex state-of-the-art methods. Our results provide a simple yet strong baseline for future work, highlight the importance of parameter tuning for baselines, and even improve the performance of the state-of-the-art second-order pruning method in this setting.

Nenad Stojanović, Boban P. Bondzulic, B. Pavlović, V. Ristić

The paper proposes an objective image quality assessment measure with full referencing. The measure is based on a comparison of the contrast of the original image and the image with the degradation. Discrete cosine transform coefficients are used for contrast estimation. By applying the measure, a scalar value is obtained that reflects the quality of the test (degraded) image. The proposed measure is tested on an infrared image dataset developed by the Military Academy in Belgrade, Serbia. The performance of the measure was compared with other well-known objective full-reference image quality assessment metrics, which were developed for the images in visible domain. It was shown that measure performance can be improved with the adequate selections of the block dimensions and the number of discrete cosine transform coefficients during the calculation of image quality value. The proposed measure obtained a correlation with the subjective scores near 82%, which puts the measure into the top three of all tested image quality assessment measures. The proposed measure showed the best performance on the images distorted by Gaussian blurring, where the level of agreement with the subjective scores is over 97%, according to which the measure stands out as the best compared to other tested measures.

Marina Marić, Dinko Radić, J. Dumančić, M. Vodanović, M. Birimiša, Davorka Radovčić, H. Brkić

This paper presents the changes caused by macroabrasion of teeth on skeletal remains found in tomb No 4 in the west necropolis of the archeological site Kopila near Blato on the island of Korčula. The site archeologically dates back to the Late Iron Age, when the island was inhabited by the Illyrians. The aim of this study was to assess the dental age of the buried individuals at death and determine the type of their diet, which could give us a preliminary insight into the socio-economic standard of the inhabitants of the settlement. The analyzed sample is part of the collection of excavated skeletal remains kept in the Vela Luka Cultural Center on the island of Korčula. 284 permanent teeth, 19 fragments of the maxilla and 20 fragments of the mandible were found in the tomb, which were classified into 32 individuals and by sex. Teeth were analyzed by metric and non-metric methods of determining dental status in order to assess the dental age at the time of death and the diet of the inhabitants. The dental age of individuals was determined by the Lovejoy method and the degree of tooth wear by the Smith-Knight method. The analysis of the stable isotope 14C determined the exact time of death of the analyzed individuals. The tooth wear changes were very pronounced and present on 92.9% of teeth, equally on incisors and molars (p = 0.236). There is no significant gender difference (p > 0.05 for all teeth and jaw parts). There was no difference in the degree of tooth wear of the teeth of the mandible and maxilla (t = -0.266, p = 0.791), nor in the degree of tooth wear of the teeth of the maxilla right and left (t = -0.392, p = 0.702) or in the degree of tooth wear of the teeth of the mandible right and left (t = -0.889, p = 0.390). The average age of the analyzed population sample was 35.6 (±3.1) years. They were buried between 360-40 BC. Tooth wear changes observed on the analyzed teeth indicate a diet rich in hard, weakly cariogenic food with particles that were probably of inorganic origin, which caused an increased wear of tooth structures. The population was sedentary, agricultural type and the life expectancy was normal for the Late Iron Age. Besides, their socio-economic status was good. The age at the time of their death was between 30 and 40 years. Further studies should include more accurate and standardized methods for assessing the condition.

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