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2. Capturing Analytical Intents from Text

Author

Pons, Gerard, Dimic, Miona, Bilalli, Besim, Ghosh, Ashish, Editorial Board Member, Zhou, Lizhu, Editorial Board Member, Tekli, Joe, editor, Gamper, Johann, editor, Chbeir, Richard, editor, Manolopoulos, Yannis, editor, Sassi, Salma, editor, Ivanovic, Mirjana, editor, Vargas-Solar, Genoveva, editor, and Zumpano, Ester, editor

Published
2025
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9. Relation between bone mineral density and IL-17 serum levels in Serbian patients with early Rheumatoid arthritis

Author

Pavlovic Voja, Dimic Aleksandar, Milenkovic Sasa, Krtinic Dane, and Aleksic Ivana

Subjects
early rheumatoid arthritis, il-17a, il-4, inf-γ, bmd, Medicine
Abstract

Rheumatoid arthritis (RA) is a chronic inflammatory disease characterized by synovial inflammation and destruction of joint cartilage and bone. Different cytokines play important role in the processes that cause articular destruction and extra-articular manifestations in RA. The contribution of cytokines representing the Th1 (INF-γ), Th2 (IL-4) and IL-17A to the pathogenesis of early RA and bone mineral density (BMD) loss in still poorly understood. Serum samples of 38 early RA patients were evaluated for erythrocyte sedimentation rate (ESR), rheumatoid factor (RF), C-reactive protein (CRP), anti-cyclic citrullinated peptide antibodies (anti-CCP) and for the tested cytokines (IL-17A, IL-4 and INF-γ). BMD was evaluated by dualenergyX-ray absorptiometry (DXA). Disease activity score (DAS28) calculation was assessed for all patients. Control serum samples were obtained from 34 healthy volunteers. The levels of tested cytokines were significantly higher (IL-17A, p

Published
2014
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10. Perceptions of the impact of individual allergic rhinitis symptoms: A survey of ARIA clinical experts

Author

Asllani, Julijana, Douagui, Habib, Asayag, Estrella, Elizabeth, Castro Maria, Crisci, Carlos D., Gomez, René Maximiliano, Ivancevich, Juan Carlos, Jares, Edgardo, Máspero, Jorge Fernando, Moreno, Pablo, Neffen, Hugo Eduardo, Zernotti, Mario Emilio, Bosnic-Anticevich, Sinthia, Chahhoud Carson, Kristin, Cvetkovski, Biljana, Davies, Janet M., Kritikos, Vicky, O'Hehir, Robyn, Oliver, Brian, Tan, House Rachel, Tattersall, Jessica, Zubrinich, Celia, Aberer, Werner, Niederberger-Leppin, Verena, Pali-Schöll, Isabella, Doyen, Virginie, Ebo, Didier, Louis, Renaud, Rombaux, Philippe, Scheire, Sophie, Bennoor, Kazi, Barreto, Bruno A., Camargos, Paulo, Chong-Neto, Herberto Jose, Cruz, Alvaro A., da Silva, Jane, Marta, Guidacci, Rizzo, José Angelo, Rosario Filho, Nelson, Faradiba, Sarquis Serpa, Solé, Dirceu, Urrutia-Pereira, Marilyn, Christoff, George, Mariana, Mandazhieva-Pepelanova, Cvetanka, Odjakova, Popov, Todor A., Vicheva, Dilyana, Teixeira Maria, do Ceu, Bouchard, Jacques, Brozek, Jan, Chu, Derek K., Denburg, Judah, Eiwegger, Thomas, Keith, Paul K., To, Teresa, Waserman, Susan, Abusada, Nancy, Alvarez Cuesta, Emilio, Calvo-Gil, Mario A., Guzmán, Maria Antonieta, Pérez Gomez, Tamara, Wong Gary, Wing Kin, Zhang, Luo, Caraballo, Luis, Cepeda Sarabia, Alfonso, Nyembue, Dieudonné, Soto-Martinez, Manuel, Miculinic, Neven, Plavec, Davor, Pitsios, Constantinos, Yiallouros, Panayiotis, Panzner, Petr, Sova, Milan, Vachova, Martina, Bindslev-Jensen, Carsten, Dahl, Ronald, Malling, Hans-Jorgen, Münter, Lars, Poulsen, Lars K., Charlotte, Suppli Ulrik, Tannert, Line Kring, Mahboub, Bassam, Salameh, Laila, Cherrez-Ojeda, Ivan, Robles, de Guevara Karla, El-Owaidy, Rasha Hassan, El-Sayed, Zeinab A., El-Sayed, Shereen Saad, Hossny, Elham, Mostafa, Badr Eldin, Julge, Kaja, Billo, Nils Eric, Eklund, Patrik, Erhola, Marina, Haahtela, Tari, Karjalainen, Jussi, Makela, Mika, Toppila-Salmi, Sanna, Valovirta, Erkka, Vasankari, Tuula, Annesi-Maesano, Isabella, Bossé, Isabelle, Bourgoin-Heck, Melisande, Charpin, Denis, Coste, André, de Blay, Frédéric, Devillier, Philippe, Didier, Alain, Dinh-Xuan, Anh Tuan, Fontaine, Jean-François, Just, Jocelyne, Nadif, Rachel, Pham-Thi, Nhân, Pigearias, Bernard, Roche, Nicolas, Ganse Eric, Van, Chkhartishvili, Ekaterine, Gamkrelidze, Amiran, Gotua, Maia, Becker, Sven, Bergmann, Karl-Christian, Bieber, Thomas, Brehler, Randolf, Buhl, Roland, Chaker, Adam M., Darsow, Ulf, Hamelmann, Eckard, Heinrich, Joachim, Keil, Thomas, Klimek, Ludger, Kolkhir, Pavel, Lau, Susanne, Maurer, Marcus, Mösges, Ralph, Neou, Angelos, Pfaar, Oliver, Ring, Johannes, Wagenmann, Martin, Zuberbier, Torsten, Ramanauskaite, Aiste, Lingnau, Anja, Christou, Demetrios, Neisinger, Sophia, Aggelidis, Xenophon, Constantinidis, Jannis, Dimou, Maria, Grigoreas, Christos, Kapsali, Trisevgeni, Katotomichelakis, Michael, Loukides, Stelios, Makris, Michael, Manousakis, Emmanouil, Mikos, Nikolaos, Pagkalos, Aris, Papadopoulos, Nikolaos G., Papanikolaou, Vasileios, Paraskevopoulos, Giannis, Piskou, Konstantina, Prokopakis, Emmanuel, Psarros, Fotios, Samitas, Konstantinos, Stamataki, Sofia, Stefanaki Lina, Evangelia, Syrigou, Ekaterini, Tsiligianni, Ioanna, Vallianatou, Mina, Vourdas, Dimitrios, Xepapadaki, Paraskevi, Karavelia, Aspasia, Wai San Ko, Fanny, Wong, Gary, Hirschberg, Andor, Kraxner, Helga, Nekam, Kristof, Lane, Stephen, Rottem, Menachem, Artesani Maria, Cristina, Barbaglia, Simona, Beghé, Bianca, Bilo Maria, Beatrice, Boner, Attilio, Bonini, Matteo, Bonini, Sergio, Braido, Fulvio, Brussino, Luisa, Canonica, G Walter, Cecchi, Lorenzo, Ciprandi, Giorgio, Compalati, Enrico, D'Amato, Gennaro, De Feo, Giulia, Del Giacco, Stefano, Fiocchi, Alessandro, Heffler, Enrico, Lombardi, Carlo, Monti, Riccardo, Muraro, Antonella, Nettis, Eustachio, Nicola, Stefania, Passalacqua, Giovanni, Patella, Vincenzo, Puggioni, Francesca, Rolla, Giovanni, Romano, Antonino, Scichilone, Nicola, Triggiani, Massimo, Ventura Maria, Teresa, Viegi, Giovanni, Boccabella, Cristina, Giovannini, Mattia, Mahesh Padukudru, Anand, Iinuma, Tomohisa, Ohta, Ken, Okamoto, Yoshitaka, Okubo, Kimihiro, Pawankar, Ruby, Sakurai, Daiju, Suzukawa, Maho, Yamaguchi, Masao, Ispayeva, Zhanat, Chang, Yoon-Seok, Park, Hae-Sim, Al-Ahmad, Mona, Cirule, Ieva, Grisle, Ineta, Irani, Carla, Rouadi, Philip, Zaitoun, Fares, Dubakiene, Ruta, Emuzyte, Regina, Kvedariene, Violeta, Gradauskiene, Brigita, Valiulis, Arunas, Ollert, Markus, Hannachi, Farah, Dokic, Dejan, Abdul Latiff, Amir Hamzah, Abdullah, Baharudin, Palaniappan, S.P., Woo, Kent, Montefort, Stephen, Bedolla Barajas, Martín, Costa Domínguez, María del Carmen, Espinoza Contreras, Jesús Guillermo, Fuentes Pèrez, Jose Miguel, Gálvez Romero, José Luis, García Cruz, María de la Luz Hortensia, González Diaz, Sandra, Huerta Villalobos, Yunuen Rocío, Larenas-Linnemann, Désiree E., Luna-Pech, Jorge Agustin, Matta Campos, Juan José, Rivero Yeverino, Daniela, Rodríguez González, Mónica, Rodríguez Zagal, Eréndira, Lkhagvaa, Battur, Mavale-Manuel, Sandra, Nunes Elizabete, Abrantes, Chavannes, Niels, Fokkens, Wytske J., Koppelman, Gerard, Maitland-van der Zee, Anke-Hilse, Reitsma, Sietze, Chandrasekharan, Ramanathan, Yusuf, Osman, Repka-Ramirez, Maria Susana, Sisul, Juan Carlos, Gereda, José E., Recto, Marysia T., Bialek, Slawomir, Bialoszewski, Artur, Chelminska, Marta, Gawlik, Radoslaw, Jassem, Ewa, Jutel, Marek, Kuna, Piotr, Kupczyk, Maciej, Moniuszko, Marcin, Niedoszytko, Marek, Raciborski, Filip, Romantowski, Jan, Samolinski, Boleslaw, Specjalski, Krzysztof, Carreiro Martins, Pedro, Correia de Sousa, Jaime, Costa, Elisio, Fonseca, Joao A., Lourenço, Olga, Morais-Almeida, Mario, Pereira Ana, Margarida, Regateiro, Frederico, Robalo Cordeiro, Carlos, Rosado Pinto, Jose, Sousa-Pinto, Bernardo, Taborda Barata, Luis, Todo-Bom, Ana Maria, Vieira Rafael, José, Carvalho, Daniela, Al-Nesf, Maryam Ali, Agache, Ioana, Berghea Elena, Camelia, Bumbacea, Roxana, Deleanu, Diana, Mihaltan, Florin, Panaitescu Bunu, Carmen, Khaitov, Musa, Namazova-Baranova, Leyla, Vishneva, Elena, Alshaikh Nada, Ali, Dimic-Janjic, Sanja, Milenkovic, Branislava, Wang, De Yun, Hrubiško, Martin, Edelbaher, Natalija, Jošt, Maja, Kopac, Peter, Košnik, Mitja, Lalek, Nika, Poplas Susic, Antonija, Rozman Sinur, Irma, Soklic Košak, Tanja, Triller, Nadja, Triller, Katja, Urbancic, Jure, Zidarn, Mihaela, Levin, Michael, Potter, Paul, Zar, Heather, Alobid, Isam, Anto, Aram, Bartra, Joan, Bobolea, Irina, Campo, Paloma, Cardona, Vicky, Carriazo Ana, Maria, Castillo Vizuete, José Antonio, Chivato, Tomas, Davila Gonzalez, Ignacio Jesus, Mullol, Joaquim, Nieto Garcia, Antonio, Picado, César, Quirce, Santiago, Sastre, Joaquin, de las Vecillas, Leticia, Benson, Mikael, Kull, Inger, van Hage, Marianne, Wickman, Magnus, Khaltaev, Nikolai, Mohammad, Yousser, Tantilipikorn, Pongsakorn, Vichyanond, Pakit, Cingi, Cemal, Gemicioglu, Bilun, Goksel, Ozlem, Kalayci, Omer, Kalyoncu, Ali Fuat, Meço, Cem, Vardaloglu, Koyuncu Ilgim, Yorgancioglu, Arzu, Karabacak, Deniz Eyice, Kirenga, Bruce, Adcock, Ian Michael, Arshad, Hasan S., Bewick, Mike, Bond, Christine, Brightling, Christopher, Bush, Andrew, Calderon, Moïses, Chung, Kian Fan, Custovic, Adnan, Djukanovic, Ratko, Durham, Stephen, Farrell, John, Halpin, David, Hyland, Michael, Johnston, Sebastian, Lipworth, Brian, Nakonechna, Alla, Price, David, Roberts, Graham, Ryan, Dermot, Schwarze, Jürgen, Sheikh, Aziz, Shields, Mike, Walker, Samantha, Williams, Sian, Kaidashev, Igor, Kurchenko, Andrii Igorevich, Tsaryk, Vladyslav, Bernstein, David, Bernstein, Jonathan A., Casale, Thomas B., Chinthrajah, Sharon, Dykewicz, Mark, Marshall, Gailen D., Meltzer, Eli O., Naclerio, Robert M., Togias, Alkis, Toskala, Elina, Wallace, Dana, Williams, Dennis M., Yawn, Barbara, Caballero-Fonseca, Fernan, Le Thi Tuyet, Lan, Vu, Tran Thien Quan, Gil-Mata, Sara, Teixeira, Tatiana, Bedbrook, Anna, Bousquet, Jean, and Vieira, Rafael José

Published
2024
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14. Oil Price Uncertainty and IPOs

Author

Blomkvist, Magnus, Dimic, Nebojsa, and Vulanovic, Milos

Subjects
Going public (Securities), Natural gas, Petroleum industry, Commodity futures, Company public offering, Business, Economics, Petroleum, energy and mining industries
Abstract

We examine the impact of oil price uncertainty on IPO volume in the oil and gas sector. By using the implied volatility of oil options, a forward-looking uncertainty measure, we identify the effect of uncertainty on the going-public decision. Oil price uncertainty exhibits a strong negative relation to IPO volume. A one standard deviation decrease in the implied volatility results in a 29% increase in the number of quarterly IPOs. The effect is concentrated among the price-sensitive upstream producers. We further report that uncertainty positively impacts the IPO withdrawal decision and increases the value of postponing the offering. Keywords: Energy economics, IPOs, Implied crude oil volatility, Oil and gas sector, Oil price uncertainty, 1. INTRODUCTION Oil price uncertainty can affect both firms' investment and financing decisions. The impact of oil price uncertainty on investments in the oil and gas sector is well documented [...]

Published
2023
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19. Oil Price Uncertainty and M&A Activity

Author

Barrows, Samuel D., Blomkvist, Magnus, Dimic, Nebojsa, and Vulanovic, Milos

Subjects
Petroleum industry -- Industry forecasts, Petroleum -- Influence -- Prices and rates, Acquisitions and mergers -- Forecasts and trends, Market trend/market analysis, Company pricing policy, Business, Economics, Petroleum, energy and mining industries
Abstract

This study examines the impact of oil price uncertainty on mergers and acquisition (M&A) activity in the oil and gas sector. Analyzing this industry enables us to construct a natural forward-looking measure of oil price uncertainty, namely the implied crude oil volatility. Using a sample of U.S. firms in the oil and gas sector from 1994-2018 containing 4,323 announced transactions, we document that oil price uncertainty is negatively related to future M&A activity. Uncertainty is mainly a driver of horizontal and vertical M&A activity, where upstream firms are more affected by this uncertainty than downstream firms. Our results lend support to a real options explanation of investment under uncertainty where firms choose to defer investments as a response to increased uncertainty. Keywords: Energy economics, M&A, Corporate investment, Implied crude oil volatility, Oil and gas sector, Oil price uncertainty, 1. INTRODUCTION What is the impact of uncertainty on firms' investment activities, more specifically mergers and acquisitions (M&A)? Recent studies highlight the impact of political (Nguyen and Phan, 2017; Bonaime [...]

Published
2023
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23. Validation of the osteoporosis quality of life questionnaire QUALEFFO-41 for the Serbian population

Author

Tadic Ivana, Vujasinovic Stupar Nada, Tasic Ljiljana, Stevanovic Dejan, Dimic Aleksandar, Stamenkovic Bojana, Stojanovic Sonja, and Milenkovic Sasa

Subjects
Osteoporosis, Validation, Quality of life, Computer applications to medicine. Medical informatics, R858-859.7
Abstract

Abstract Background Vertebral fractures could lead to reduced physical, social and mental functioning, and loss of personal independence. Therefore, during the treatment of osteoporosis, it has become necessary to examine the changes in everyday functioning, well-being and health related quality of life (HRQOL). To that effect, this study aims to translate, culturally adapt, and validate the Serbian version of Quality of Life Questionnaire of the European Foundation for Osteoporosis (QUALEFFO-41) for patients with vertebral fractures. Methods Nine female patients with osteoporosis participated in the pre-validation study. A validation, case–control study included two groups of female patients: one that consisted of 50 female patients with osteoporosis, and with at least one vertebral fracture, and another one that consisted of 50 control patients with osteoporosis but without fractures. They completed the QUALEFFO-41 and the EuroQol group questionnaire with five dimensions (EQ-5D) twice within a month. The validation study examined internal consistency, concurrent validity, test-retest reliability, sensitivity and specificity. Results During the pre-validation study, three of the items in the QUALEFFO-41 were slightly changed. Afterwards, during the validation study, the statistically significant differences (adjusted for: age, duration of menopause, current employment and marital status) in the mean values of all domains and total scores between the groups were noted. For the case group, the internal consistency of the QUALEFFO-41 domains and of total questionnaire was above 0.70. The test-retest reliability was tested by the intraclass correlation coefficients (ICC) that were in range 0.87 – 0.96 for the case, and 0.15 – 0.83 for the control group. Correlations between the total scores of the QUALEFFO-41 and the EQ-5D health state value, for both groups were negative and statistically significant (r = -0.78, p Conclusions The Serbian QUALEFFO-41 version is reliable, valid, sensitive and predictive for examinations of HRQOL in patients with prevalent vertebral fractures and can be used in further studies.

Published
2012
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25. Bell's theorem for trajectories

Author

Gočanin, Dragoljub, Dimić, Aleksandra, Del Santo, Flavio, and Dakić, Borivoje

Subjects
Quantum Physics
Abstract

In classical theory, the trajectory of a particle is entirely predetermined by the complete set of initial conditions via dynamical laws. Based on this, we formulate a no-go theorem for the dynamics of classical particles, i.e., a Bell's inequality for trajectories, and discuss its possible violation in a quantum scenario. A trajectory, however, is not an outcome of a quantum measurement, in the sense that there is no observable associated with it, and thus there is no "direct" experimental test of the Bell's inequality for trajectories. Nevertheless, we show how to overcome this problem by considering a special case of our generic inequality that can be experimentally tested point-by-point in time. Such inequality is indeed violated by quantum mechanics, and the violation persists during an entire interval of time and not just at a particular singular instant. We interpret the violation to imply that trajectories (or at least pieces thereof) cannot exist predetermined, within a local-realistic theory., Comment: 5+5 pages, 3+2 figures (main text + supplemental material), typos corrected

Published
2020
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29. Configuring a Class of Machines Based on Reconfigurable 2DOF Planar Parallel Mechanism

Author

Vasilic, Goran, Zivanovic, Sasa, Kokotovic, Branko, Dimic, Zoran, Milutinovic, Milan, Kacprzyk, Janusz, Series Editor, Gomide, Fernando, Advisory Editor, Kaynak, Okyay, Advisory Editor, Liu, Derong, Advisory Editor, Pedrycz, Witold, Advisory Editor, Polycarpou, Marios M., Advisory Editor, Rudas, Imre J., Advisory Editor, Wang, Jun, Advisory Editor, Mitrovic, Nenad, editor, Mladenovic, Goran, editor, and Mitrovic, Aleksandra, editor

Published
2022
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34. Neural Network based classification of bone metastasis by primary cacinoma

Author

Prokopijević, Marija, Stančić, Aleksandar, Vasiljević, Jelena, Stojković, Željko, Dimić, Goran, Sopta, Jelena, Ristić, Dalibor, and Nagamalai, Dhinaharan

Subjects
Computer Science - Computer Vision and Pattern Recognition, Computer Science - Cryptography and Security
Abstract

Neural networks have been known for a long time as a tool for different types of classification, but only just in the last decade they have showed their entire power. Along with appearing of hardware that is capable to support demanding matrix operations and parallel algorithms, the neural network, as a universal function approximation framework, turns out to be the most successful classification method widely used in all fields of science. On the other side, multifractal (MF) approach is an efficient way for quantitative description of complex structures [1] such as metastatic carcinoma, which recommends this method as an accurate tool for medical diagnostics. The only part that is missing is classification method. The goal of this research is to describe and apply a feed-forward neural network as an auxiliary diagnostic method for classification of multifractal parameters in order to determine primary cancer., Comment: 13 pages, 9 figures

Published
2018
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35. Experimental few-copy multi-particle entanglement detection

Author

Saggio, Valeria, Dimić, Aleksandra, Greganti, Chiara, Rozema, Lee A., Walther, Philip, and Dakić, Borivoje

Subjects
Quantum Physics
Abstract

Quantum technologies lead to a variety of applications that outperform their classical counterparts. In order to build a quantum device it must be verified that it operates below some error threshold. Recently, because of technological developments which allow for the experimental realization of quantum states with increasing complexity, these tasks must be applied to large multi-qubit states. However, due to the exponentially-increasing system size, tasks like quantum entanglement verification become hard to carry out in such cases. Here we develop a generic framework to translate any entanglement witness into a resource-efficient probabilistic scheme. We show that the confidence to detect entanglement grows exponentially with the number of individual detection events. To benchmark our findings, we experimentally verify the presence of entanglement in a photonic six-qubit cluster state generated using three single-photon sources operating at telecommunication wavelengths. We find that its presence can be certified with at least 99.74% confidence by detecting 20 copies of the quantum state. Additionally, we show that genuine six-qubit entanglement is verified with at least 99% confidence by using 112 copies of the state. Our protocol can be carried out with a remarkably low number of copies, making it a practical and applicable method to verify large-scale quantum devices., Comment: 9 pages, 4 figures

Published
2018
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39. Effects of Hydroxyapatite Additions on Alginate Gelation Kinetics During Cross-Linking.

Author

Dimic-Misic, Katarina, Imani, Monir, and Gasik, Michael

Subjects
*CHEMICAL properties, *GELATION kinetics, *CALCIUM alginate, *BIOACTIVE compounds, *RHEOLOGY
Abstract

Alginate hydrogels have gathered significant attention in biomedical engineering due to their remarkable biocompatibility, biodegradability, and ability to encapsulate cells and bioactive molecules, but much less has been reported on the kinetics of gelation. Scarce experimental data are available on cross-linked alginates (AL) with bioactive components. The present study addressed a novel method for defining the crosslinking mechanism using rheological measurements for aqueous mixtures of AL and calcium chloride (CaCl2) with the presence of hydroxyapatite (HAp) as filler particles. The time-dependent crosslinking behaviour of these mixtures was exploited using a plate–plate rheometer, when crosslinking occurs due to calcium ions (Ca2+) binding to the guluronic acid blocks within the AL polymer, forming a stable "egg-box" structure. To reveal the influence of HAp particles as filler on crosslinked sample morphology, after rheological measurement and crosslinking, crosslinked samples were freeze-dried and their morphology was assessed using an optical microscope and SEM. It was found that the addition of HAp particles, which are known to enhance the mechanical properties and biocompatibility of crosslinked AL gels, significantly decreased (usually rapidly) the interaction between the Ca2+ and AL chains. In this research, the physical "shielding" effect of HAp particles on the crosslinking of AL with Ca2+ ions has been observed for the first time, and its crosslinking behaviour was defined using rheological methods. After crosslinking and rheometer measurements, the samples were further evaluated for morphological properties and the observations were correlated with their dewatering properties. While the presence of HAp particles led to a slower crosslinking process and a more uniform development of the rheological parameters, it also led to a more uniform porosity and improved dewatering properties. The observed effects allow for a better understanding of the crosslinking process kinetics, which directly affects the physical and chemical properties of the AL gels. The shielding behaviour (retardation) of filler particles occurs when they physically or chemically block certain components in a mixture, delaying their interaction with other reactants. In hydrogel formulations, filler particles like hydroxyapatite (HAp) can act as barriers, adsorbing onto reactive components or creating physical separation, which slows the reaction rate and allows for controlled gelation or delayed crosslinking. This delayed reactivity is beneficial for precise control over the reaction timing, enabling the better manipulation of material properties such as crosslinking distribution, pore structure, and mechanical stability. In this research, the physical shielding effect of HAp particles was observed through changes in rheological properties during crosslinking and was dependent on the HAp concentration. The addition of HAp also enabled more uniform porosity and improved dewatering properties. The observed effects allow for a better understanding of the crosslinking process kinetics, which directly affects the physical and chemical properties of the AL gels. [ABSTRACT FROM AUTHOR]

Published
2025
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40. Simulating indefinite causal order with Rindler observers

Author

Dimić, Aleksandra, Milivojević, Marko, Gočanin, Dragoljub, Móller, Natália S., and Brukner, Časlav

Subjects
Quantum Physics
Abstract

Realization of indefinite causal order (ICO), a theoretical possibility that even causal relations between physical events can be subjected to quantum superposition, apart from its general significance for the fundamental physics research, would also enable quantum information processing that outperforms protocols in which the underlying causal structure is definite. In this paper, we start with a proposition that an observer in a state of quantum superposition of being at two different relative distances from the event horizon of a black hole, effectively resides in ICO space-time generated by the black hole. By invoking the fact that the near-horizon geometry of a Schwarzschild black hole is that of a Rindler space-time, we propose a way to simulate an observer in ICO space-time by a Rindler observer in a state of superposition of having two different proper accelerations. By extension, a pair of Rindler observers with entangled proper accelerations simulates a pair of entangled ICO observers. Moreover, these Rindler-systems might have a plausible experimental realization by means of optomechanical resonators., Comment: 9 pages, 6 figures. Title is changed, major revision of the paper is done

Published
2017
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41. Single-copy entanglement detection

Author

Dimić, Aleksandra and Dakić, Borivoje

Subjects
Quantum Physics
Abstract

One of the main challenges of quantum information is the reliable verification of quantum entanglement. The conventional detection schemes require repeated measurement on a large number of identically prepared systems. This is hard to achieve in practice when dealing with large-scale entangled quantum systems. In this letter we develop a novel method by formulating verification as a decision procedure, i.e. entanglement is seen as the ability of quantum system to answer certain "yes-no questions". We show that for a variety of large quantum states even a single copy suffices to detect entanglement with a high probability by using local measurements. For example, a single copy of a $16$-qubit $k$-producible state or one copy of $24$-qubit linear cluster state suffices to verify entanglement with more than $95\%$ confidence. Our method is applicable to many important classes of states, such as cluster states or ground states of local Hamiltonians in general., Comment: published version

Published
2017
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42. Reconfigurable open architecture control system with integrated digital twin for 3-axis woodworking milling machine.

Author

Dimic, Zoran, Zivanovic, Sasa, Pavlovic, Dragan, Furtula, Mladen, Djurkovic, Marija, Rakic, Aleksandar, and Kokotovic, Branko

Subjects
DIGITAL control systems, VIRTUAL machine systems, AUTOMATION, DIGITAL twin, COMPUTER systems, MACHINE tools
Abstract

This study proposes a reconfigurable open architecture control system for the Computer Numerical Control (CNC) woodworking educational machine tool called "EMCO F1 CNC". On this machine physical hardware reconfiguration (spindle position can be vertical and horizontal) is possible. The idea was to develop a control system that would follow the configuration changes of the machine tool. The educational character of the machine and its reconfigurability demand possibilities for machining programme simulations in order to determine optimal workpiece position in the workspace and programme verification. Those are the reasons for developing a virtual machine tool integrated with the control system as a digital twin. The study presents a novel methodology for the development of control systems, merging the concept of "virtual commissioning" with iterative error-driven processes. The objective was to develop a dynamic control system capable of promptly adjusting to kinematics changes in real time. In a wood machining experiment, a test workpiece for machine tools for both machine configurations verified the operation of the developed control system. [ABSTRACT FROM AUTHOR]

Published
2024
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