Search Results (44)

This research introduces an automated 3D virtual reconstruction system tailored for architectural heritage (AH) applications, contributing to the ongoing paradigm shift from traditional CAD-based workflows to artificial intelligence-driven methodologies. It reviews recent advancements in machine learning and deep learning—particularly neural radiance fields (NeRFs) and its successor, Gaussian splatting (GS)—as state-of-the-art techniques in the domain. The study advocates for replacing point cloud data in heritage building information modeling workflows with image-based inputs, proposing a novel “photo-to-BIM” pipeline. A proof-of-concept system is presented, capable of processing photographs or video footage of ancient ruins—specifically, Romanesque–Mudéjar churches—to automatically generate 3D mesh reconstructions. The system’s performance is assessed using both objective metrics and subjective evaluations of mesh quality. The results confirm the feasibility and promise of image-based reconstruction as a viable alternative to conventional methods. The study successfully developed a system for automated 3D mesh reconstruction of AH from images. It applied GS and Mip-splatting for NeRFs, proving superior in noise reduction for subsequent mesh extraction via surface-aligned Gaussian splatting for efficient 3D mesh reconstruction. This photo-to-mesh pipeline signifies a viable step towards HBIM. Full article

This study focuses on the formal verification of a parallel version of the minimax algorithm using the mCRL2 modeling language, applied to the game of Connect 4. The research aims to ensure that the algorithm behaves correctly in concurrent execution environments by providing a formal model and conducting rigorous verification. The parallel version of minimax distributes computations across multiple threads, with each thread evaluating different successor states concurrently. Using mCRL2, we specify the algorithm’s behavior, generate Labeled Transition Systems (LTSs), and verify critical properties such as the absence of deadlocks, liveness, and correctness of state transitions. The formal verification process demonstrates that the proposed model accurately represents the parallel minimax algorithm and ensures its reliability by verifying properties that guarantee unique and non-redundant actions throughout the execution. The findings highlight the value of formal methods in validating the correctness of parallel artificial intelligence algorithms, laying the foundation for future optimizations that focus on performance. Full article

This article explores the official exhibition of Austrian art held in May 1930 at The Society for the Encouragement of the Fine Arts in Warsaw. Showcasing 474 artworks by 100 artists, the exhibition spanned the years 1918–1930, a period marked by Austria’s efforts to overcome post-war political isolation. The article examines the exhibition’s rhetoric and its critical reception in Warsaw within the broader context of Polish–Austrian diplomatic relations, influenced by Austria’s challenging political and economic situation and the priorities of the Second Polish Republic. The introductory essay in the exhibition catalogue, authored by Hans Tietze, emphasized Vienna’s seminal role as a cultural center at the crossroads of European artistic trends. This approach aligned with the cultural diplomacy of Johannes Schober’s government, which aimed to underscore a rhetoric of openness to the cultures of other nations, particularly the successors of the Habsburg Empire. This contrasted with the later identity policy of the Bundesstaat Österreich, which elevated Tyrol as emblematic of the core German–Austrian identity constructed in the new state. The analysis reveals that the exhibition represented the peak of Polish–Austrian cultural relations during the interwar years, suggesting the potential for broader engagement. However, this potential was short-lived, ultimately thwarted by the Anschluss of Austria to Germany in 1938. Full article

In ecological modeling, symmetry can manifest in multiple ways, significantly contributing to our understanding of ecosystem stability, species interactions, and ecological balance. Considering the bloom phenomenon caused by excessive algae in ponds and its impact on aquaculture, we establish a class of algae–fish ecological models with two state-dependent impulse controls. In this paper, we first discuss the existence of positive equilibria in the system without impulses. Second, the existence and asymptotic stability of the order-1 and order-2 periodic solutions are analyzed by applying successor functions and a Similar Poincare Criterion. Finally, numerical simulations demonstrate that the model exhibits order-1 and order-2 periodic solutions, clarifying that the system with two impulses can address the problem more effectively. Full article

This article examines church–state relations in the early period of the People’s Republic of China (PRC) by scrutinising the thoughts and the administration of Chao Tzu-chen—a prominent Chinese Christian leader—at Yenching University’s School of Religion and its successor organisation. This article largely relies on the archives of the Hong Kong Sheng Kung Hui, delving into Chao’s psychological conflicts and the role of the Anglican churches in Chao’s plan for the separation of the School of Religion from the university. It argues that Chao Tzu-chen’s self-contradictions in his public versus private expressions after 1949 signify his disillusionment in fostering the convergence between Christianity and Communism, as demonstrated in his dilemma regarding church–state relations. Although Chao tried to adapt to the new political order by urging Chinese churches to offer practical and concrete social services, he continued his independent, critical theological reflections on the indigenisation of Christianity, as reflected in his private portrayal of the incompatibility between Christianity and Communism, and in his close connection with foreign churches in his fund-raising campaign. Moreover, apart from highlighting the importance of the Hong Kong Anglican church in financially supporting the Yenching School of Religion, this article seeks to contribute to academic research of Chinese higher education in the 1950s through examining how the Chinese Communist Party’s remolding of the School put an end to the emerging public sphere of a civil society. It reveals that this liberal Christian institute, which lost its control over curriculum design and the right to accept foreign funds, was quickly converted into a government-funded, socialist theological college in service of two masters: the Party and the Church. Full article

Mammography can reduce breast cancer incidence and mortality. Studies on the utilization of mammography among migrant and non-migrant women are inconsistent. Many of these studies do not take the heterogeneity of migrants in terms of ethnicity and country of origin into account. The aim of the present study was to examine disparities in the use of mammography between non-migrant women and the five largest migrant groups in Austria. The study used data from a nationwide population-based survey of 5118 women aged 45 years and older and analyzed the participation in mammography as a dependent variable. Multivariable logistic regression was used to compare mammography uptake between the aforementioned groups of women, while adjusting for socioeconomic and health variables. The study shows that all migrant groups involved tended to use mammography less frequently than non-migrant women; statistically significant differences, however, were only observed for Hungarian migrant women (adjusted OR = 0.36; 95%-CI: 0.13, 0.95; p = 0.038) and women from a Yugoslavian successor state (adjusted OR = 0.55; 95%-CI: 0.31, 0.99; p = 0.044). These findings are consistent with other studies in Europe and beyond, highlighting the heterogeneity of migrant populations and emphasizing the need for a diversity-sensitive approach to health care. Full article

The human Vitamin K Epoxide Reductase Complex (hVKORC1), a key enzyme that converts vitamin K into the form necessary for blood clotting, requires for its activation the reducing equivalents supplied by its redox partner through thiol–disulphide exchange reactions. The functionally related molecular complexes assembled during this process have never been described, except for a proposed de novo model of a ‘precursor’ complex of hVKORC1 associated with protein disulphide isomerase (PDI). Using numerical approaches (in silico modelling and molecular dynamics simulation), we generated alternative 3D models for each molecular complex bonded either covalently or non-covalently. These models differ in the orientation of the PDI relative to hVKORC1 and in the cysteine residue involved in forming protein–protein disulphide bonds. Based on a comparative analysis of these models’ shape, folding, and conformational dynamics, the most probable putative complexes, mimicking the ‘precursor’, ‘intermediate’, and ‘successor’ states, were suggested. In addition, we propose using these complexes to develop the ‘allo-network drugs’ necessary for treating blood diseases. Full article

Quarkonia represent one of the most valuable probes of the deconfined quark–gluon hot medium since the very first experimental studies with ultrarelativistic heavy-ion collisions. A significant step forward in characterizing the QCD matter via systematic studies of quarkonia production will be performed by the next-generation heavy-ion experiment ALICE 3, a successor of the ongoing ALICE experiment at the Large Hadron Collider. The new advanced detector of ALICE 3 will allow for exploring the production of S- and P-state quarkonia at high statistics, at low and moderate transverse momenta ranges. The performance of ALICE 3 for quarkonia measurements and the requirements for the detectors are discussed. Full article

In all regions of the world, musculoskeletal disorders are a significant contributor to the burden of chronic illnesses. The effectiveness of treatments, such as rehabilitation, may vary intersectionally across demographic and other categories. The present study examines this intersectionality with respect to a lack of improvement in health conditions after rehabilitation of patients in Germany. Routine data from 298,617 patients aged 18–65 years residing in Germany who received rehabilitation because of arthropathies, dorsopathies, or soft tissue disorders during 2006–2016 were included in the analysis. Odds of the outcome were compared across demographic groups and across diagnostic sub-groups by means of multivariable logistic regression. Interaction terms were included to examine intersectional differences across these groups and over time. Women were more likely than men to have an impairment despite treatment (adjusted odds ratio [aOR] = 1.11; 95%-CI = 1.08, 1.13). In addition, patients in semi-skilled/unskilled employment were at higher odds of a poor outcome compared to patients in skilled positions (aOR = 1.13; 95%-CI = 1.10–1.17). Nationality also affected health care outcomes, with Turkish nationals and nationals from a Yugoslav successor state having higher odds of a poor outcome than Germans (aOR = 1.56; 95%-CI = 1.45–1.67 and aOR = 1.52; 95%-CI = 1.41–1.65, respectively). The findings highlight the importance of an intersectional perspective in health research and practice and can support the development of strategies and measures that aim to reduce disparities in health care. Full article

Recent R&D activities in nuclear fusion have identified the DEMO reactor as the ITER successor, aiming at demonstrating the technical feasibility of fusion plants, along with their commercial exploitation. However, the pulsed operation of the machine causes an “unconventional” operation of the system, posing unique challenges to the functional feasibility of the steam generator, for which it is necessary to define and qualify a reference configuration for DEMO. In order to facilitate the transitions between different operational regimes, the Once Through Steam Generator (OTSG) is considered to be a suitable choice for the DEMO primary heat transfer systems, being characterized by lower thermal inertia with respect to the most common U-tube steam generators. In this framework, the ENEA has undertaken construction of the STEAM facility at Brasimone R.C., aiming at characterizing the behavior of the DEMO OTSG and related water coolant systems in steady-state and transient conditions. A dedicated OTSG mock-up has been conceived and designed, adopting a scaling procedure, keeping the height 1:1 of the DEMO OTSGs. The conceptual design has been supported by RELAP5/Mod3.3 thermal-hydraulic calculations. CFD and FEM codes have been used for fluid-dynamic analyses and mechanical stress analyses, respectively, in specific parts of the component. Full article

Wireless underwater sensor networks have various applications—such as ocean exploration and deep-sea disaster monitoring—making them a hot topic in the research field. To cover a larger area and gather more-precise information, building large-scale underwater sensor networks has become a trend. In such networks, acoustic signals are used to transmit messages in an underwater environment. Their features of low speed and narrow bandwidth make media access control (MAC) protocols unsuitable for radio communications. Furthermore, a network consists of a large number of randomly deployed nodes, making it impossible to pre-define an optimized routing table or assign a central controller to coordinate the message propagation process. Thus, optimized routing should emerge via interaction among individual nodes in the network. To address these challenges, in this paper we propose a communication coordinator under the time division multiple access (TDMA) framework. Each node in the network is equipped with such a coordinator so that messages in the network can be sent following the shortest path in a self-organized way. The coordinator consists of a slot distributor and a forwarding guide. With the slot distributor, nodes in the sensor network occupy proper communication slots and the network finally converges to the state without communication collision. This is achieved with a set of ecological niche- and pheromone-inspired laws, which encourage nodes to occupy slots that can decrease the waiting time for a node to send a message packet while weakening the enthusiasm for a node to occupy the slots that it fails to occupy several times. With the forwarding guide, a node can send the message packet to the best successor node so that the message packet can be sent to the base station along the shortest path. It has been proven that the laws in the forwarding guide are equivalent to the Dijkstra Algorithm. Simulation experiment results indicate that with our coordinator, the network can converge to the state without collision using fewer coordination messages. In addition, the time needed to send a message to the destination is shorter than that of the classical Aloha protocol. Full article

Many European studies report lower participation in colorectal cancer screening among migrants than non-migrants. A major limitation of these studies is that usually, the heterogeneity of migrants cannot be accounted for. The aim of this investigation was to examine differences in the utilization of fecal occult blood testing and colonoscopy between non-migrants and the five largest migrant groups residing in Austria using data from the Austrian Health Interview Survey 2019. The two outcomes were compared between non-migrants and migrants using multivariable logistic regression adjusted for socioeconomic and health variables. Migrants from a Yugoslav successor state (OR = 0.61; 95%-CI: 0.44–0.83), Turkish (OR = 0.35; 95%-CI: 0.22–0.55), Hungarian (OR = 0.37; 95%-CI: 0.16–0.82) and German migrants (OR = 0.70; 95%-CI: 0.51–0.98) were less likely to have used a fecal occult blood test compared to non-migrants. Participation in colonoscopy was lower among Turkish migrants (OR = 0.42; 95%-CI: 0.27–0.67) and migrants from a Yugoslav successor state (OR = 0.56; 95%-CI: 0.42–0.75) than among non-migrants. The findings are consistent with studies from other countries and highlight barriers migrants face in accessing the health care system. To address these barriers, the heterogeneity of the population must be taken into account when developing educational materials in order to promote informed decisions about whether or not to participate in colorectal cancer screening. Full article

Śrī Nāth is one of the most important images of Krishna being worshipped at the temple of Nathdwara in Rajasthan. His devotees consider him to be a living god, he appears in their dreams, and according to their sayings they are in direct contact with him. Śrī Nāth, originally a local deity, is equated with the major Hindu god Krishna. However, while Krishna may be one of the most important gods in India, he is also ambiguous through his acts and words, if not bluntly unreliable. This double nature of Krishna is reflected in the cult of Śrī Nāth. There is an interesting interaction between Śrī Nāth (implying Krishna himself), the main gurus of his cult, i.e., Vallabha (Vallabhācārya) and the latter’s son and main successor Viṭṭhalnāth and his devoted disciples. At times, Śrī Nāth feels the need to stick to the official Brahmanical cult of the temple rituals, on other occasions, there is no problem in transgressing any given official rule. The same is true for the primary teachers, who are often put on par with Krishna himself or one of the celestials closely connected to him. Additionally, the disciples can apparently do anything in their frenzies. All of this reinforces the idea that this entire cult belongs to another world (alaukik). It is part of the everyday world (laukik) of Hindu India, but meanwhile, each and every rule can be ignored if the supernatural breaks through. Even the distinction between Hinduism and Islam at times simply does not seem to be of importance anymore. Muslims can become addicted to the passionate love for Krishna through the form of Śrī Nāth, so it is sometimes stated. Each and every partaker in the cult may share the visions of the initiated devotee, at times even without proper initiation. This all adds to the experience of the supermundane and supernatural in this particular cult. Full article

Intelligent reconfigurable surfaces (IRSs) have gained much attention due to their passive behavior that can be a successor to relays in many applications. However, traditional relay systems might still be a perfect choice when reliability and throughput are the main concerns in a communication system. In this work, we use an IRS along with a decode-and-forward relay to provide a possible solution to address one of the main challenges of future wireless networks which is providing reliability. We investigate a robust transceiver design against the residual self-interference (RSI), which maximizes the throughput rate under self-interference channel uncertainty-bound constraints. The yielded problem turns out to be a non-convex optimization problem, where the non-convex objective is optimized over the cone of semidefinite matrices. We propose a novel mathematical method to find a lower bound on the performance of the IRS that can be used as a benchmark. Eventually, we show an important result in which, for the worst-case scenario, IRS can be helpful only if the number of IRS elements are at least as large as the size of the interference channel. Moreover, a novel method based on majorization theory and singular value decomposition (SVD) is proposed to find the best response of the transmitters and relay against worst-case RSI. Furthermore, we propose a multi-level water-filling algorithm to obtain a locally optimal solution iteratively. We show that our algorithm performs better that the state of the art in terms of time complexity as well as robustness. For instance, our numerical results show that the acheivable rate can be increased twofold and almost sixfold, respectively, for the case of small and large antenna array at transceivers. Full article

Treaties and covenants have been the most important instruments of international relations in both ancient and modem times, playing a significant role in the promotion of religious freedom, peaceful coexistence, and interfaith harmony. The rapid spread and broad appeal of early Islam brought matters of international relations and cosmopolitan state governance to a cadre of Muslim leaders whose main political experience had been with parochial Arabian tribalism. The foremost issue was the position, rights, and responsibilities of non-Muslim religious communities within the Arab-Islamic empire. Consequently, numerous covenants and treaties were devised with subjects and with foreign states during the expansion of the Muslim world. This study examines the protection of non-Muslim places of worship under the rule of the Prophet Muḥammad ﷺ and his successors, including future caliphs and generals. It explores the practical application of the covenants by the successors of the Prophet Muḥammad ﷺ during early Islamic history, exploring the extent to which these covenants and treaties were effective in maintaining peaceful co-existence in a multi-faith society. In sum, for the sake of concision, only specific segments of the covenants and treaties are examined, which were devised with the non-Muslims for the protection of their worship places during the early Muslim Conquests. Full article