Arts in Development of Tourist Experiences

The paper presents theoretical and practical aspects of the impact of arts on tourist experiences. The paper will analyse both theoretical and practical aspects of experience marketing of art\u27s events on tourist experiences.  In empirical research, the paper will present results about the segmentation of target groups of tourists who choose a tourist destination on the basis of arts events, as well as their satisfaction with arts events, exhibitions, concerts, theatres events, literary events at the time happened in the chosen destination. Results of research about tourist\u27s satisfaction would be important for further research on the development of a tourist destination as a brand. Social media, blog, post have an impact on the development of tourist experiences, based on art experiences.  This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.</p

Querying Geometric Figures Using a Controlled Language, Ontological Graphs and Dependency Lattices

Dynamic geometry systems (DGS) have become basic tools in many areas of geometry as, for example, in education. Geometry Automated Theorem Provers (GATP) are an active area of research and are considered as being basic tools in future enhanced educational software as well as in a next generation of mechanized mathematics assistants. Recently emerged Web repositories of geometric knowledge, like TGTP and Intergeo, are an attempt to make the already vast data set of geometric knowledge widely available. Considering the large amount of geometric information already available, we face the need of a query mechanism for descriptions of geometric constructions. In this paper we discuss two approaches for describing geometric figures (declarative and procedural), and present algorithms for querying geometric figures in declaratively and procedurally described corpora, by using a DGS or a dedicated controlled natural language for queries.Comment: 14 pages, 5 figures, accepted at CICM 201

Computer-Assisted Proving of Combinatorial Conjectures Over Finite Domains: A Case Study of a Chess Conjecture

There are several approaches for using computers in deriving mathematical proofs. For their illustration, we provide an in-depth study of using computer support for proving one complex combinatorial conjecture -- correctness of a strategy for the chess KRK endgame. The final, machine verifiable, result presented in this paper is that there is a winning strategy for white in the KRK endgame generalized to $n \times n$ board (for natural $n$ greater than $3$). We demonstrate that different approaches for computer-based theorem proving work best together and in synergy and that the technology currently available is powerful enough for providing significant help to humans deriving complex proofs

Computer-Assisted Proving of Combinatorial Conjectures Over Finite Domains: A Case Study of a Chess Conjecture

There are several approaches for using computers in deriving mathematical proofs. For their illustration, we provide an in-depth study of using computer support for proving one complex combinatorial conjecture -- correctness of a strategy for the chess KRK endgame. The final, machine verifiable, result presented in this paper is that there is a winning strategy for white in the KRK endgame generalized to $n \times n$ board (for natural $n$ greater than $3$). We demonstrate that different approaches for computer-based theorem proving work best together and in synergy and that the technology currently available is powerful enough for providing significant help to humans deriving complex proofs

Automated Completion of Statements and Proofs in Synthetic Geometry: an Approach based on Constraint Solving

Conjecturing and theorem proving are activities at the center of mathematical practice and are difficult to separate. In this paper, we propose a framework for completing incomplete conjectures and incomplete proofs. The framework can turn a conjecture with missing assumptions and with an under-specified goal into a proper theorem. Also, the proposed framework can help in completing a proof sketch into a human-readable and machine-checkable proof. Our approach is focused on synthetic geometry, and uses coherent logic and constraint solving. The proposed approach is uniform for all three kinds of tasks, flexible and, to our knowledge, unique such approach.Comment: In Proceedings ADG 2023, arXiv:2401.1072

Funkcije (ilegalnih) noćnih izlazaka za mlade tokom pandemije: između neoliberalizma i neotribalizma

Pandemija kovid-19 ostavila je značajne posledice po živote mladih, dra-matično preoblikujući njihove društvene živote usled zabrane okupljanja. Pored toga, neki od njih se nisu pridržavali zaštitnih mera, što je vidljivo na primerima posećivanja ilegalnih žurki. U ovoj studiji istražile smo funkcije koje noćni izlasci mogu imati za mlade, kao i njihovu motivaciju za kršenje zabrane okupljanja. Sprovele smo dubinske intervjue sa 13 mladih osoba (7 muškaraca, uzrasta 18–29 godina), a podatke smo ana-lizirale pomoću refleksivne tematske analize. Većina učesnika se ustručavala od noćnih izlazaka, gubeći vredan resurs za povezivanje sa drugima i prevladavanje stresa. Uče-snici koji su nastavili da posećuju žurke koristili su ih kao resurs za prevladavanje stresa vezanog za pandemiju, takođe ističući veći osećaj povezanosti na ilegalnim žurkama u poređenju s izlascima pre pandemije. Nalaze koji se tiču društvenih funkcija žurki za mlade tumačile smo kroz prizmu teorija neoliberalizma i neot ribalizma. Zaključujemo da žurke imaju primarno individualističke funkcije za mlade, s upečatljivim „džepovi-ma” kolektivizma.The COVID-19 pandemic has had a great effect on young people, with their social lives being particularly impacted by the restrictions on social gatherings. Some of them, nevertheless, did not adhere to restrictions, and participated in illegal parties. In this study, we explored the functions of (illegal) nightlife for youth, as well as their motives for noncompliance with restrictions on social gatherings. We conducted in-depth semi-structured interviews with thirteen young people (seven male, aged 18–29) and the data was analyzed using reflex-ive thematic analysis. Restrictions on public gatherings revealed the multiple functions parties had for youth as a unique multimodal experience that can’t be easily substituted. Parties were described as unique experiences in particu-lar because they facilitated the loss of individuality and coalescence with the collective. Some participants tried to make up for the loss of this resource by simulating parties in their own home, which proved to be unsatisfactory. Most participants refrained from going out, reporting a loss of a valuable resource for connecting with others and managing stress. In refraining from partying, some participants felt as though they lost a part of themselves. This highlighted the importance of the clubbing culture for defining one’s identity. Participants that continued to attend parties used them as a resource for managing stress relat-ed to the pandemic. Participants who attended illegal parties employed various strategies in order to relativize the seriousness of the pandemic. Nevertheless, most of them experienced a tension between their fear of the coronavirus and the need to feel carefree. Illegal partygoers also emphasized a greater sense of connectedness with other attendees than at pre-pandemic parties. Findings related to the social functions of parties for young people are interpreted from the perspective of theories of neoliberalism and neotribalism. We conclude that parties have primarily individualistic functions for young people, with distinct ‘patches’ of collectivism.La pandémie du covid-19 a laissé des conséquences considérables sur la vie des jeunes, en refaçonnant de manière dramatique leur vie sociale en raison de l'interdiction de rassemblement. En outre, certains d'entre eux ne respectaient pas les mesures de protection, ce qui est notamment visible dans le cas des so-irées illégales. Dans cette étude nous avons exploré les fonctions que les fêtes nocturnes peuvent avoir sur les jeunes, ainsi que leur motivation pour transgres-ser l'interdiction de rassemblement. Nous avons mené des entretiens en profon-deur avec 13 jeunes personnes (dont 7 hommes de l'âge de 18–29 ans), et avons analysé les données à l'aide d'une analyse thématique réflexive. La plupart des interrogés se privaient des fêtes nocturnes, perdant un moyen précieux pour se rapprocher des autres et évacuer le stress. Les interrogés qui ont continué à se rendre à des soirées les utilisaient comme un moyen pour gérer le stress lié à la pandémie, soulignant aussi un sentiment plus grand d'intimité dans des soirées illégales que dans des soirées avant la pandémie. Nous avons interprété les résultats qui concernent les fonctions sociales des soirées pour les jeunes à travers le prisme des théories du néolibéralisme et du néotribalisme. Nous concluons que les soirées ont principalement des fonctions individualistes pour les jeunes avec de remarquables « poches » du collectivisme

Automated generation and checking of verification conditions

LAV is a system for statically verifying program assertions and locating bugs such as buffer overflows, pointer errors and division by zero. LAV is primarily aimed at analyzing programs written in the programming language C. Since LAV uses the popular LLVM intermediate code representation, it can also analyze programs written in other procedural languages. Also, the proposed approach can be used with any other similar intermediate low level code representation. System combines symbolic execution, SAT encoding of program’s control-flow, and elements of bounded model checking. LAV represents the program meaning using first-order logic (FOL) formulas and generates final verification conditions as FOL formulas. Each block of the code (blocks have no internal branchings and no loops) is represented by a FOL formula obtained through symbolic execution. Symbolic execution, however, is not performed between different blocks. Instead, relationships between blocks are modeled by propositional variables encoding transitions between blocks. LAV constructs formulas that encode block semantics once for each block. Then, it combines these formulas with propositional formulas encoding the transitions between the blocks. The resulting compound FOL formulas describe correctness and incorrectness conditions of individual instructions. These formulas are checked by an SMT solver which covers suitable combination of theories. Theories that can be used for modeling correctness conditions are: theory of linear arithmetic, theory of bit-vectors, theory of uninterpreted functions, and theory of arrays. Based on the results obtained from the solver, the analyzed command may be given the status safe (the command does not lead to an error), flawed (the command always leads to an error), unsafe (the command may lead to an error) or unreachable (the command will never be executed). If a command cannot be proved to be safe, LAV translates a potential counterexample from the solver into a program trace that exhibits this error. It also extracts the values of relevant program variables along this trace. The proposed system is implemented in the programming language C++, as a publicly available and open source tool named LAV. LAV has support for several SMT solvers (Boolector, MathSAT, Yices, and Z3). Experimental evaluation on a corpus of C programs, which are designed to demonstrate areas of strengths and weaknesses of different verification techniques, suggests that LAV is competitive with related tools. Also, experimental results show a big advantage of the proposed system compared to symbolic execution applied to programs containing a big number of possible execution paths. The proposed approach allows determining status of commands in programs which are beyond the scope of analysis that can be done by symbolic execution tools. LAV is successfully applied in educational context where it was used for finding bugs in programs written by students at introductory programming course. This application showed that in these programs there is a large number of bugs that a verification tool can efficiently find. Experimental results on a corpus of students’ programs showed that LAV can find bugs that cannot be found by commonly used automated testing techniques. Also, it is shown that LAV can improve evaluation of students’s assignments: (i) by providing useful and helpful feedback to students, which is important in the learning process, and (ii) by improving automated grading process, which is especially important to teachers.LAV je sistem za automatsko generisanje i proveravanje uslova ispravnosti programa. Sistem je namenjen prvenstveno analizi programa napisanih u programskom jeziku S, ali, pošto koristi LLVM međujezik, može se primeniti i za analizu programa napisanih u drugim proceduralnim programskim jezicima. Sistem kombinuje simboličko izvršavanje, opisivanje ponašanja programa iskaznim promenljivama i proveravanje ograničenih modela. Individualni blokovi LLVM međukoda modeluju se formulama logike prvog reda koje se konstruišu simboličkim izvršavanjem. Relacije između blokova se modeluju iskaznim promenljivama. Formule, koje opisuju ponašanja blokova koda zajedno sa relacijama između blokova, kombinuju se i na osnovu njih prave se formule koje opisuju ponašanje programa. Te formule koriste se za formiranje uslova ispravnosti pojedinačnih komandi programa. Uslovi ispravnosti šalju se na proveru SMT rešavaču koji pokriva odgovarajuću kombinaciju teorija. Podržane teorije, u kojima je moguće modelovati uslove ispravnosti programa, su teorija linearne aritmetike, teorija bit vektora, teorija neinterpretiranih funkcija i teorija nizova. Komanda može imati status bezbedne (izvršavanje komande ne dovodi do greške), neispravne (izvršavanje komande sigurno dovodi do greške), nebezbedne (izvršavanje komande može da dovede do greške) i nedostižne (do izvršavanja komande nikada neće doći). Predloženi sistem je implementiran u programskom jeziku C++ kao alat LAV koji je javno dostupan i otvorenog koda. U okviru alata postoji podrška za rad sa nekoliko SMT rešavača (Boolector, MathSAT, Yices i Z3). Eksperimentalni rezultati na korpusu S programa, koji služe za utvrđivanje mogućnosti verifikacijskih alata, pokazuju da je predstavljen pristup uporediv sa postojećim srodnim alatima. Takođe, eksperimentalni rezultati pokazuju prednost predloženog sistema u odnosu na simboličko izvršavanje u programima u kojima postoji veliki broj mogućih putanja. Kompaktno modelovanje mogućih putanja kroz program omogućava utvrđivanje ispravnosti komandi u programima koji su van domašaja alata za simboličko izvršavanje. LAV je uspešno primenjen i u kontekstu obrazovanja gde je korišćen za otkrivanje grešaka u studentskim radovima. Ovom primenom pokazano je da u studentskim radovima uvodnog kursa programiranja postoji veliki broj grešaka koje verifikacijski alat može efikasno da pronađe. Eksperimentalni rezultati pokazali su da je verifikacija efikasnija od trenutno dominantno korišćenih tehnika automatskog testiranja jer može da otkrije greške u studentskim programima koje su van domašaja ovih tehnika. Takođe, pokazano je kako LAV može da unapredi automatsku evaluaciju studentskih radova na polju generisanja kvalitetnih, razumljivih i pouzdanih podataka o rezultatima rada studenta, kao i na polju automatskog ocenjivanja

Isolated eyeball metastasis of non-seminomatous germ cell testicular tumor

Introduction. Testicular tumors most frequently metastasize to regional lymph nodes. Non-seminomatous tumor metastasis of testicle (NSGCTT) to the eyeball is rare. Case report. We presented a 24-year old man, referred to the ophthalmologist due to acute pain and abrupt loss of sight in the left eye accompanied by its enlargement. Orbital and endocranial computerized tomography (CT) was carried out, indicating the tumor in the left eye. His previous medical history provided the information that the right testicle was painlessly enlarged for 8 months. Ultrasonography showed a completely tumorously altered testis. Abdominal and chest CT failed to reveal any secondary deposits in visceral organs and lymph glands. Tumor markers (AFP - alpha-fetoproteins, beta hCG - human choronic gonadotropin beta) were elevated. Right radical orchiactomy was performed (showed NSGCTT), followed by polychemotherapy with cisplatinum 100 mg/m2, etoposide 120 mg/m2, bleomycin 15 mg/m2 (PEB ´ 4), resulting in normalization of tumor marker values and significant regression of the left eyeball. Next, the left eye enucleation and ocular prosthesis implantation was carried out. Pathohistological evaluation indicated fibrosis and necrosis only. In a 5-year follow-up period, the patient was free of recurrence. Conclusion. Isolated hematogenous metastasis of the NSGCTT to the eye is rare. In our case, the left eye was the only metastatic localization. After chemotherapy and eye enucleation the patient was in a 4- year follow-up period free of the recurrence

Socijalni marketing u strategiji digitalizacije edukacije

U radu je predstavljen teorijski i praktični aspekt socijalnog marketinga u strategiji digitalizacije edukacije. U prvom delu rada, analizirane su teorijske osnove socijalnog marketinga. U drugom delu rada, urađeno je istraživanje primene socijalnog marketinga u strategiji digitalizacije edukacije. Naglašeno je da bi strategije socijalnog marketinga trebalo adaptirati za implementaciju u digitalnom okruženju. Cilj rada je da se definišu moderni pristupi socijalnog marketinga u povećanju svesti o važnosti edukacije, a potom o mogućnostima edukacije u digitalnom okruženju. Posebna pažnja posvećena je kontinuiranoj edukaciji za sve ciljne grupe, osnovaca, srednjoškolaca, studenata, poslediplomaca, kao i ljudi koji streme unapređenju znanja i saznanja u toku celog života. U radu je istaknuto da novi modeli socijalnog marketinga u fokus stavljaju korisnike edukativnih usluga, proces edukacije i edukatore koji učestvuju u procesu edukacije. U radu je prepoznat trend povećane potražnje za edukativnih programima, kao i želja za jasnom komunikacijom prilikom edukativnog procesa. Posebna pažnja posvećena je strategijama socijalnog marketinga, zasnovanog na analizi, implementaciji i kontroli. Edukacija u digitalnom okruženju zahteva sinergiju marketinških pristupa, jasnu komunikaciju sa ciljnim javnostima i kombinaciju strategija socijalnog marketinga. Poseban akcenat u radu stavljen je na inkluziju X generacije u procesu edukacije i saradnje sa Z generacijom koja je usklađena sa tehnološkim razvojem

Holistic marketing in development of arts and cultural institutions in digital environment

The paper present theoretical and practical approach of holistic marketing implementation in development of arts and cultural institutions in digital environment. In the paper is analyzed all parts of holistic marketing, internal marketing, integrated marketing, social responsible approach and relationship marketing. Internal marketing present organizational culture that send messages to public audience about arts and cultural institutions. Integrated marketing have to send consistent messages to target groups about artistic and cultural events. Social responsible approach is base in working of arts and cultural institutions. Arts and culture open thoughts, ideas, value that otherwise could be unnoticed. Through arts, social problems could be solved, by raising awareness about that problems. Relationship marketing give opportunity for communication with public audience. Social media are platform for relationship communications. Arts and culture improve values and ideas in digital environment, Arts and cultural institutions accepted digital environment and try to be convenience for public