Search Results (78)

Various factors such as natural disasters, vandalism, weather, and environmental conditions can affect the physical state of traffic signs. The proposed model aims to improve detection of traffic signs affected by partial occlusion as a result of overgrown vegetation, displaced signs (those knocked down, bent), perforated signs (those damaged with holes), faded signs (color degradation), rusted signs (corroded surface), and de-faced signs (placing graffiti, etc., by vandals). This research aims to improve the detection of bad traffic signs using three approaches. In the first approach, Spiral Pooling Pyramid-Fast (SPPF) and C3TR modules are introduced to the architecture of Yolov5 models. SPPF helps provide a multi-scale representation of the input feature map by pooling at different scales, which is useful in improving the quality of feature maps and detecting bad traffic signs of various sizes and perspectives. The C3TR module uses convolutional layers to enhance local feature extraction and transformers to boost understanding of the global context. Secondly, we use predictions of Yolov5 as base models to implement a mean ensemble to improve performance. Thirdly, test time augmentation (TTA) is applied at test time by using scaling and flipping to improve accuracy. Some signs are generated using stable diffusion techniques to augment certain classes. We test the proposed models on the CCTSDB2021, TT100K, GTSDB, and GTSRD datasets to ensure generalization and use k-fold cross-validation to further evaluate the performance of the models. The proposed models outperform other state-of-the-art models in comparison. Full article

The aim of this article is to assess which elements of street design impact subjective well-being in the central area of a city in southern Chile, based on residents’ perceptions. Fifty-six semi-structured walking interviews were conducted to obtain records of pedestrians’ self-reported perceptions of their environment. To categorize the emotions reported in the interviews, the Circumplex Model of Affect was used to organize and classify the declared emotions. The results revealed that street design elements such as heritage buildings with well-maintained facades with intense colors in their coatings, spacious front gardens, wooden facades, low fences, wide sidewalks, soft or rubberized floors, and trees with colorful fruits and leaves promote a greater dominance of high-intensity positive emotions such as enjoyment, joy, happiness, liking, and pleasure. In contrast, neglected or abandoned building facades, blind fronts with graffiti or murals, high fences, tall buildings, treeless or vegetation-free sidewalks, untrimmed bushes, and narrow and poorly maintained sidewalks promote negative emotions of both high and low activation such as fear, anger, dislike, rage, unsafety, discomfort, and stress. The article concludes with the development of an emotional map of momentary experiences, identifying places of well-being and discomfort in public spaces. The value of this map is discussed as a tool to inform urban design in the promotion of healthier pedestrian environments in Latin American cities. Full article

There is currently a certain pressure from various mnemonic communities, animated by vernacular interests, to canonize new saints within what is regarded as the flawed saints’ cultural-political movement. Among these new, uncanonized saints, whose memory is commemorated unofficially in various cultural-political registers, there is also the football star Diego Armando Maradona, called by his millions of fans “the Hand of God” (La Mano de Dios). The commemorative culture that thrived around Maradona’s persona—materialized in artefacts, shrines, icon-like paintings, prints, graffiti, stencils, and other memorabilia—do not fit the customary narratives of sainthood, nor to the display and content of the recently inaugurated (2023) memorial to the new martyrs of both the 20th and 21st centuries at Saint Bartholomew Basilica in Rome. The article argues that the commemoration of Maradona by his fans in Italy, Argentina, and worldwide is enacted in pop culture formats aimed at addressing different sets of contemporary mnemonic and spiritual needs. The aim is to offer a fresh conceptual engagement with the contemporary cultural-political phenomenon of “flawed saints” commemoration through the lens of contemporary popular culture, taking the culture of commemoration of Diego Maradona as a case study. Full article

Graffiti represents a multi-disciplinary social behavior. It is used to annotate urban landscapes under the assumption that building façades will constantly evolve and acquire modified skins. This study aimed to simulate the interaction between building façades and generative AI-based graffiti using Stable Diffusion^® (SD v 1.7.0). The context used for graffiti generation considered the graffiti as the third skin, the remodeled façade as the second skin, and the original façade as the first skin. Graffiti was created based on plain-text descriptions, representative images, renderings of scaled 3D prototype models, and characteristic façades obtained from various seed elaborations. It was then generated from either existing graffiti or the abovementioned context; overlaid upon a campus or city; and judged based on various criteria: style, area, altitude, orientation, distribution, and development. I found that rescaling and reinterpreting the context presented the most creative results: it allowed unexpected interactions between the urban fabric and the dynamics created to be foreseen by elaborating on the context and due to the divergent instrumentation used for the first, second, and third skins. With context awareness or homogeneous aggregation, graphic partitions can thus be merged into new topologically re-arranged polygons that enable a cross-gap creative layout. Almost all façades were found to be applicable. AI generation enhances awareness of the urban fabric and facilitates a review of both the human scale and buildings. AI-based virtual governance can use generative graffiti to facilitate the implementation of preventive measures in an urban context. Full article

The close conceptual links between symbolic death, rebirth, and pilgrimage are widely known to modern sociologists and anthropologists and can be observed in several modern pilgrimage traditions. This study argues that the same connections can already be detected in Aristides’ Hieroi Logoi, “the earliest detailed first-person account of pilgrimage that survives from antiquity”. In terms of methodology, this article follows recent scholarly work on ancient lived religion perspectives and religiously motivated mobility that favours a broader understanding of the notion of pilgrimage in the Greek-speaking world. Rutherford, in particular, has produced a plethora of pioneering studies on all aspects of ‘sacred tourism’ experience in various media including documentary papyri, inscriptions, and graffiti. This chapter builds further on Rutherford’s work and focuses on Aristides’ accounts of his visits to smaller, less-well known healing centres. The main aim is to demonstrate how Aristides’ pilgrimage experience to the healing temple of Asclepius at Poimanenos or Poimanenon (a town of ancient Mysia near Cyzicus) is wholly recast and presented in terms of travelling to the sacred site of Eleusis, one of the most important cultural and religious centres of the Roman Empire in the Antonine Era. Thus, Aristides’ pilgrimage experience to Poimanenos is successfully reframed as a mystic initiation that marks the death of the previous ill self and the birth of the new, enlightened, and healthy self. Full article

There is something queer about Symbolism. Art historians have long acknowledged the links between Symbolist aesthetics and contemporaneous ideas about human sexuality, and even a cursory examination of artworks by male Symbolist artists working across the continent reveals an eyebrow-raising number of muscled nudes, lithe ephebes, and intimate male couplings. The sensual male body could register the artist’s erotic desire, even as he put it forth as an idealized emblem of transcendental truth. But perhaps Symbolism’s queerness extended beyond subject matter. Scholars have argued that Symbolism was in part defined by a subversive approach to visual semiotics: a severing—we might say a queering—of the ties binding a sign to its established cultural meaning. Similarly, male homosexual subcultures were sustained by endowing established signs and pictures with a uniquely queer significance. This paper seeks to tease out the relationship between Symbolist aesthetics and male homosexuality in terms of a shared sensibility towards pictorial interpretation. Taking as a case study the work of the Swedish Symbolist artist Eugène Jansson, I argue that Symbolism held appeal for homosexual artists precisely because queer subcultures were primed to read subversive meaning into normative pictures. Offering a new reading of Symbolism’s sexual valences, I contextualize the movement’s attendant artworks within the broader cultural landscape of homosexual signs and symbols and articulate the parallels between Symbolist approaches to the image and queer modes of seeing in the late nineteenth century. Full article

Contemporary murals and street art play a critical role in urban culture, serving as platforms for social activism and reflecting the vibrancy of city life. This study within the SuperStaAr project framework examines the challenge of graffiti removal while safeguarding the original synthetic paint layers. Through a detailed investigation using Q-Switch and Long Q-Switch lasers (Nd:YAG), we evaluate the effectiveness and safety of laser cleaning techniques on both unaged and artificially aged mural mock-ups. The initial findings highlight the Q-Switch and Long Q-Switch lasers as promising for removing graffiti without compromising the paint integrity. Our assessment criteria—encompassing residue presence, surface roughness, color changes, cleaning effectiveness, and pigment pickup—were validated through empirical evaluation and supported by colorimetric, micro–ATR–FTIR, and Py–GC/MS analyses. Notably, the incorporation of a passive sampling system for Py–GC/MS analysis facilitates a deeper understanding of the ablated materials without direct sampling from the artwork. This research contributes a foundational framework for the evaluation of laser cleaning in mural conservation, emphasizing the importance of tailored strategies to enhance the sustainability of urban art conservation efforts. Full article

Unauthorised graffiti is a challenge in urban environments, affecting railway structures, stations, tracks, and vehicles. Inefficient cleaning methods increase the costs and downtime of railcars, limiting passenger transport. In turn, they are harmful to the operator’s health and the environment, due to the VOCs they release. This study focuses on the feasibility of dry-ice blasting, replacing carbon dioxide with ambient air as an innovative and sustainable solution to remove graffiti from rail vehicles. Experimental tests have been carried out with 13 different aerosols, controlling the temperature (<−80 °C), pressure (up to 3 bar), projection distance (0.5 cm) and exposure times (30″/1′/2′/4′/6′/8′/++). The results showed that ultra-freezing with ambient air preserved the integrity of the support materials and altered the topography, colourimetry and adhesion of the aerosols tested, achieving the total removal of one of the paints. Preliminary results suggest that ultra-freezing with ambient air could be a viable and sustainable solution for graffiti removal on railway structures, transferable to other urban environments. Full article

During the Holocaust, poets went to extraordinary lengths to write their poems and transmit them. Poems that were written during those years were often buried in the ground, stitched into clothing, smuggled out of prisons, or graffitied onto walls. These object documents carried more than facts about these events; they carried the feeling of living through these events. This research explores the last poems of four Holocaust poets, Władysław Szlengel, Selma Meerbaum-Eisinger, Hannah Szenes, and Abramek Koplowicz, investigating not only the poems but their object-ness and their stories of transference. These poems, like urgent postcards, deliver messages to a family, to a community, to the world. They ask―what does it mean to write a poem as a last will and testament? Full article

The aim of the work was to investigate the influence of the surface texture of composite based on PA6, intended for wet painting, on the stability of the colour and gloss parameters. The stability of the paint coating was required to be maintained despite exposure to mechanical stress resulting from attempts to manually remove graffiti stains. The study examined the influence of surface texture on the effectiveness of cleaning. In the case of painted surfaces from which graffiti stains were effectively removed, the roughness, colour parameters and gloss of the paint coating were measured. During the research, it was found that roughness after painting decreased to the value of Ra < 2.00 µm meets aesthetic expectations and at the same time ensures the effective removal of graffiti stains. For this surface, there were no negative effects of the mechanical impact on the textures or quality parameters of the coating as a result of manual graffiti removal. As a result of the conducted research, the recommended maximum values of roughness and textures of the surfaces to be painted were determined in order to ensure a sufficiently low amount of work necessary to effectively remove traces of graffiti. Full article

We tested predictions deriving from the “Pleasure-Interest Model of Aesthetic Liking” (PIA Model), whereby aesthetic preferences arise from two fluency-based processes: an initial automatic, percept-driven default process and a subsequent perceiver-driven reflective process. One key trigger for reflective processing is stimulus complexity. Moreover, if meaning can be derived from such complexity, then this can engender increased interest and elevated liking. Experiment 1 involved graffiti street-art images, pre-normed to elicit low, moderate and high levels of interest. Subjective reports indicated a predicted enhancement in liking across increasing interest levels. Electroencephalography (EEG) recordings during image viewing revealed different patterns of alpha power in temporal brain regions across interest levels. Experiment 2 enforced a brief initial image-viewing stage and a subsequent reflective image-viewing stage. Differences in alpha power arose in most EEG channels between the initial and deliberative viewing stages. A linear increase in aesthetic liking was again seen across interest levels, with different patterns of alpha activity in temporal and occipital regions across these levels. Overall, the phenomenological data support the PIA Model, while the physiological data suggest that enhanced aesthetic liking might be associated with “flow-feelings” indexed by alpha activity in brain regions linked to visual attention and reducing distraction. Full article

Fluorocarbon polyurethane amino baking paint for graffiti-resistant whiteboards was designed and prepared. Firstly, perfluorohexylethyl alcohol (TEOH6) and hexamethylene diisocyanate (HDI) were reacted under certain conditions to obtain fluorocarbon mono-isocyanate, then fluorocarbon diols were obtained by reacting with trimethylolpropane, and finally fluorocarbon polyurethane hydroxy resin was formed by reacting with hexamethylene diisocyanate (HDI) and polyester diols. The synthesized hydroxyl resin was used as the basis to configure fluorocarbon polyurethane amino baking paint for graffiti-resistant whiteboards and was upgraded by adding hydroxyl silicone oil. Secondly, a series of performance tests, such as hardness, adhesion, flexibility, and corrosion resistance, were conducted to verify that the baking paint possessed excellent properties for use on writing whiteboards. The graffiti resistance of each paint film was evaluated by different methods, and it was found that the graffiti resistance was mainly due to the excellent hydrophobicity and oleophobicity of the paint films after the enrichment of fluorocarbon chains on their surfaces, and the combined effect of low surface energy caused by hydroxyl silicone oil crosslinked with amino resin. This study provides a theoretical basis and technical support for the preparation of fluorocarbon polyurethane baking paint for graffiti-resistant whiteboards. Full article

Color data are often required for cultural heritage documentation. These data are typically acquired via standard digital cameras since they facilitate a quick and cost-effective way to extract RGB values from photos. However, cameras’ absolute sensor responses are device-dependent and thus not colorimetric. One way to still achieve relatively accurate color data is via camera characterization, a procedure which computes a bespoke RGB-to-XYZ matrix to transform camera-dependent RGB values into the device-independent CIE XYZ color space. This article applies and assesses camera characterization techniques in heritage documentation, particularly graffiti photographed in the academic project INDIGO. To this end, this paper presents COOLPI (COlor Operations Library for Processing Images), a novel Python-based toolbox for colorimetric and spectral work, including white-point-preserving camera characterization from photos captured under diverse, real-world lighting conditions. The results highlight the colorimetric accuracy achievable through COOLPI’s color-processing pipelines, affirming their suitability for heritage documentation. Full article

This manuscript investigates the cultural and educational dimensions of murals and graffiti in the ruins of the Aliko Hotel on Naxos Island. Moving beyond their aesthetic value, these artworks are examined as conduits for complex sociocultural and educational discourses. Employing semiotic analysis, particularly informed by Roland Barthes’ conceptual framework, the study offers a multi-layered interpretation of the significance of street art. A systematic approach guided the empirical data collection, entailing the careful selection and categorisation of 76 photographs, eventually honed down to 21 key images for detailed analysis. This set, comprising 6 murals and 15 graffiti pieces, was subjected to meticulous examination to discern both dominant themes and motifs (‘studium’) and the elements evoking personal connections (‘punktum’), thereby facilitating emotional and intellectual engagement. The methodology of the study is tailored to uncover the collective narratives encapsulated within these visual forms, as well as the individual responses they provoke. It probes how personal interpretations are influenced by the viewers’ beliefs and backgrounds, thereby expanding the semiotic analysis to encompass both shared and individual meanings. This balanced analytical approach deepens the understanding of visual expressions as dynamic interactions between the artwork and its audience. It underscores the transformative role of street art in urban environments and its contribution to public art discourse. The impending demolition of the Hotel Aliko ruins underscores the ephemeral nature of street art. The murals and graffiti, as transient custodians of cultural and social narratives, accentuate the fragile nature of this cultural heritage. This critical moment underscores the importance of documenting and preserving such art forms and the stories they encapsulate, highlighting their significant role in shaping community identity and cultural education. Full article

Historic graffiti offer new and interesting insights into late medieval and early modern English society. This paper will show the value of studying these inscriptions by discussing two churches constructed in the late medieval period in Suffolk, England, with drawings of two figures that potentially represent the Virgin Mary and the Christ Child. These drawings are similar and yet quite different in their quality and execution, and they possibly relate to lost medieval imagery within the building. These images may also have been created in response to various iconoclastic movements that occurred as part of the Reformation as well as after it. This paper seeks to encourage further study on the relationship between historic graffiti and local history by observing the connection between the late medieval parish churches of Lidgate and Stradishall and their respective figural drawings by suggesting that graffiti serve a larger purpose than idle drawing or doodling and instead are valuable pieces of evidence about parish life and values. Full article