Large-scale Events Research Articles

Meteorological Characteristics of a Continuous Ice-Covered Event on Ultra-High Voltage Transmission Lines in Yunnan Region in 2021

Yunnan plays a pivotal role in transmitting electricity from west to east within China’s Southern Power Grid. During 7–13 January 2021, a large-scale continuous ice-covering event of ultra-high voltage (UHV) transmission lines occurred in the Qujing area of eastern Yunnan Province. Based on ERA5 reanalysis data and meteorological observation data of UHV transmission line icing in China’s Southern Power Grid, the synoptic causes of the icing are comprehensively analyzed from various perspectives, including weather situations, vertical stratification of temperature and humidity, local meteorological elements, and atmospheric circulation indices. The results indicate a strong East Asian trough and a blocking high directing northern airflow southward ahead of the ridge. Cold air enters the Qujing area and combines with warm and moist air from the subtropical high pressure of 50–110° E. As warm and cold air masses form a quasi-stationary front over the northern mountainous area of Qujing due to topographic uplift, the mechanism of “supercooling and warm rain” caused by the “warm–cold” temperature profile structure leads to freezing rain events. Large-scale circulation indices in the Siberian High, East Asian Trough, and 50–110° E Subtropical High regions provided clear precursor signals within 0–2 days before the icing events.

Abstract 409: Deciphering chromosomal instability in consensus molecular subtypes (CMS) in CRC: Insights from an integrative multi-omics approach

Abstract CRC is a heterogeneous disease with different molecular subtypes, which can have a profound impact on treatment response and patient outcomes. CMS classification based on gene expression profiles has been shown to differentiate patients into clinically relevant sub-groups. However, deep multi-omics characterization of the CMS classes based on high quality patient data is lacking. Through the integration of multi-omics data, we aim to enhance our understanding of CRC’s molecular heterogeneity and thereby facilitate the development of personalized therapeutic strategies. We performed a multi-omics analysis of CRC patients to identify potential new features of CMS groups. 890 fresh-frozen, surgically resected CRC tumor and adjacent normal samples were used to analyze whole genome and RNA sequencing data. DNA and RNA was prepared using Qiagen AllPrep Universal and KAPA Hyper Prep kit (DNA), as well as TruSeq Stranded Total mRNA kits and sequenced on a NovaSeq6000 system. We identified CMS subtypes based on RNA-Seq data and performed all statistical analyses using R. Our analysis revealed distinct molecular characteristics across the four CMS subtypes, including unique driver mutations, signaling cascades, and immune cell infiltration profiles. The poor prognosis associated with CMS4 patients was corroborated by our clinical data. Notably, we observed high global chromosomal instability (CIN) profiles for both CMS2 and CMS4 and identified recurrent global aneuploidy patterns within these subtypes that link alterations of known cancer genes to these large-scale structural events. We found higher levels of CIN in CMS2 compared to CMS4, which appears to be predominantly driven by numerical, rather than structural CIN. Specifically, in CMS2, SMAD2/4 is commonly impacted by deletion on chromosome arm 18q, while PLCG1 is more influenced by amplifications on 20q respectively, suggesting potential values as CRC CMS biomarkers. In conclusion, our integrative multi-omics analysis offers a comprehensive understanding of CRC molecular subtypes, which can inform personalized treatment strategies. Our findings underscore the importance of considering not only specific driver mutations but also large-scale structural rearrangements in the context of CMS subtypes. Citation Format: Julia Bischof, Jonathan Woodsmith, David Church. Deciphering chromosomal instability in consensus molecular subtypes (CMS) in CRC: Insights from an integrative multi-omics approach [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2024; Part 1 (Regular Abstracts); 2024 Apr 5-10; San Diego, CA. Philadelphia (PA): AACR; Cancer Res 2024;84(6_Suppl):Abstract nr 409.

Evidence of cross-channel dispersal into England of the forest pest Ips typographus

A breeding population of the tree-killing European spruce bark beetle Ips typographus was detected in England for the first time in 2018 and was initially assumed to have arrived with infested timber. To test the hypothesis that the beetles are dispersing naturally across the English channel, extensive trap networks were deployed in 2021 and 2022 to track the flight activity of the beetles from an outbreak hotspot in France and Belgium to southern England, including parallel ‘coastal’ traps on either side of the channel. Beetles were caught all along the transect, decreasing in abundance with distance from the outbreak area. Linear modelling indicates that beetles dispersed into England during 2021 and 2022, and that during a large-scale dispersal event in June 2021, beetles could have penetrated more than 160 km inland. The 2021 dispersal event initiated new incursions of the beetle in southeast England and demonstrates the extraordinary distance I. typographus may move under outbreak conditions. Our findings support the hypothesis of a damaging forest pest aerially dispersing across the barrier of the English channel and suggest that future incursions of this and other plant-associated pests may move via the same pathway.

Unsupervised representation learning for BGP anomaly detection using graph auto-encoders

The Border Gateway Protocol (BGP) is crucial for the communication routes of the Internet. Anomalies in BGP can pose a threat to the stability of the Internet. These anomalies, caused by a variety of factors, can be challenging to detect due to the massive and complex nature of BGP data traces. Various machine learning techniques have been employed to overcome this issue. The traditional approach involves the extraction of ad hoc features, which, although effective, results in a significant loss of information and may be biased towards a certain type of anomaly. A recent supervised machine learning pipeline learns representations from BGP graphs derived from BGP data traces. Although this solution achieves good anomaly detection results, the representations learned are specific to the types of anomalies within the training data. To overcome this limitation, in this paper, we propose to learn the representations of normal BGP behaviour in an unsupervised manner using a Graph Auto-Encoder (GAE). This approach ensures that the representations are not limited to the specific set of anomalies included in the training set. These representations associated with a Multi-Layer Perceptron (MLP)-based detector allowed to achieve an accuracy rate of 99% in detecting large-scale events, outperforming previous literature results.

A study on the sustainability of large sporting events and host cities-the Harbin Asian winter games as an example

This paper delves into the relationship among major sports events and urban sustainability. The paper takes case study of the Asian winter games in Harbin, China. This paper also explores the effects of support events and presents pragmatic policy options for those countries opting to host significant sporting events. Major sports events have a wider audiences, which offers huge potential for advancing sustainable development in urban societies. The key objectives of the paper is to find out the effects of major sporting events on urban sustainable development using the Asian winter games in Harbin as an example. Important insights explain the important of support events. It aims to enhance the city’s outlook. Moreover, it promote economic progress, and raise the standard of living for its people. This paper highlights the significant opportunity large-scale sports events present for urban sustainable development while underscoring the importance of planning, management, and evaluation. ‘The winter games of Asia presents important lessons for other cities to achieve sustainable development goals better, ensuring the success of hosting major sports events aligns with the city's sustainable development. The results of this paper provide helpful guidance for later similar paper and pragmatic utility.

Leveraging Major Sport Events’ Success Towards Positioning Qatar as a Sport Tourism Destination

Through substantial investments in the sports sector, Qatar has solidified its position as a prominent global sport events destination. Notably recognised for hosting the monumental 2006 Asian Games, this marked the inception of Qatar's evolution into a hub for sport tourism. Since then, Qatar has successfully hosted several large-scale international sporting events, culminating in the historic hosting of the 2022 FIFA World Cup. This trajectory continues with Qatar securing bids for forthcoming events such as the 2027 FIBA Basketball Cup and the 2030 Asian Games. Despite earlier unsuccessful bids for the Olympic and Paralympic Games in 2016 and 2020, Qatar remains committed to upholding its exceptional hosting legacy. This study seeks to discern the critical dimensions contributing to successful hosting and their broader impact on the host country. Drawing insights from a critical review of past events, including comparative analyses with FIFA World Cups from 2022, 2018, and 2014, this research aims to identify common key indicators and their influence on local communities. By discerning these elements, the study endeavours to craft a roadmap for hosting major sporting events, addressing challenges, and leveraging supporting factors. The outcomes will offer prospective agendas and recommendations intended to bolster Qatar's strategic positioning as a competitive international sport tourism destination. For aspiring nations like Qatar, these large-scale sporting events serve as catalysts for sustainable impacts that transcend the event itself.

Entangled Positionality: Researchers’ Everyday Practices Amidst Coronavirus, War, and Parenting

Reflecting on the researcher’s position is crucial for understanding how data are gathered, analyzed, and presented. However, researcher positionality is often reckoned through overly deterministic and rigid social statuses. This is problematic, as intertwined everyday practices of researchers’ living and doing fieldwork are diverse and messy. By reflecting on ethnographic research in Russia during the COVID-19 pandemic and in the wake of the Russo-Ukrainian war, we elaborate an alternative way to speak of and identify the researcher’s position. Using the concept of “entanglement,” we describe how researchers’ everyday practices together with large-scale events, researchers’ social statuses, personal lives, and mundane contingencies, co-produce researchers’ positionality at all stages of the research. We also provide recommendations on how to incorporate such an “entangled positionality” into methodological and epistemological aspects of social research.

Comparative Mitogenomics Analysis Revealed Evolutionary Divergence among Neopestalotiopsis Species Complex (Fungi: Xylariales).

The genus Neopestalotiopsis consists of obligate parasites that cause ring spot, scab, and leaf blight diseases in higher plant species. We assembled the three complete mitogenomes for the guava fruit ring spot pathogen, Neopestalotiopsis cubana. The mitogenomes are circular, with sizes of 38,666 bp, 33,846 bp, and 32,593 bp. The comparative analyses with Pestalotiopsis fici showed that N. cubana differs greatly from it in the length of the mitogenomes and the number of introns. Moreover, they showed significant differences in the gene content and tRNAs. The two genera showed little difference in gene skewness and codon preference for core protein-coding genes (PCGs). We compared gene sequencing in the mitogenomes of the order Xylariales and found large-scale gene rearrangement events, such as gene translocations and the duplication of tRNAs. N. cubana shows a unique evolutionary position in the phylum Ascomycota constructed in phylogenetic analyses. We also found a more concentrated distribution of evolutionary pressures on the PCGs of Neopestalotiopsis in the phylum Ascomycota and that they are under little selective pressure compared to other species and are subjected to purifying selection. This study explores the evolutionary dynamics of the mitogenomes of Neopestalotiopsis and provides important support for genetic and taxonomic studies.

Large-scale heavy precipitation over the Czech Republic and its link to atmospheric circulation in CORDEX regional climate models

The study evaluates ability of regional climate models (RCMs) to reproduce relationships between large-scale heavy precipitation events (LHPEs) over the Czech Republic and atmospheric circulation. We use an ensemble of 32 RCM simulations with the 0.11° resolution from the Euro-CORDEX project, and compare the historical simulations (1951–2005) against observations from the E-OBS data set. A novel selection criterion for LHPEs is proposed, defining these as days with at least 70% of all grid boxes over a given area with precipitation amounts exceeding the 90th grid-specific percentile of the seasonal distribution of daily amounts. The association with atmospheric circulation is investigated through circulation types derived from sea level pressure using airflow indices (direction, strength and vorticity). The majority of the RCMs capture that the frequency of days with LHPEs is higher in winter than summer, but almost all underestimate the occurrence of LHPEs in both seasons. In winter, the observed LHPEs are connected mainly with cyclonic types and westerly supertype; the role of nonwesterly and cyclonic-nonwesterly supertypes is significant only in the eastern part, where the Atlantic influence is weaker. In summer, the importance of cyclonic and nonwesterly types in producing LHPEs increases compared to winter. The RCMs reasonably well reproduce these links, including differences between seasons and regions, if their ensemble mean is evaluated, but large variations occur among individual simulations mainly in summer. The importance of cyclonic vorticity is overestimated in the RCMs, while westerly advection of moist air plays a smaller role in models than in observations.

Quantifying the global film festival circuit: Networks, diversity, and public value creation.

Film festivals are a key component in the global film industry in terms of trendsetting, publicity, trade, and collaboration. We present an unprecedented analysis of the international film festival circuit, which has so far remained relatively understudied quantitatively, partly due to the limited availability of suitable data sets. We use large-scale data from the Cinando platform of the Cannes Film Market, widely used by industry professionals. We explicitly model festival events as a global network connected by shared films and quantify festivals as aggregates of the metadata of their showcased films. Importantly, we argue against using simple count distributions for discrete labels such as language or production country, as such categories are typically not equidistant. Rather, we propose embedding them in continuous latent vector spaces. We demonstrate how these "festival embeddings" provide insight into changes in programmed content over time, predict festival connections, and can be used to measure diversity in film festival programming across various cultural, social, and geographical variables-which all constitute an aspect of public value creation by film festivals. Our results provide a novel mapping of the film festival circuit between 2009-2021 (616 festivals, 31,989 unique films), highlighting festival types that occupy specific niches, diverse series, and those that evolve over time. We also discuss how these quantitative findings fit into media studies and research on public value creation by cultural industries. With festivals occupying a central position in the film industry, investigations into the data they generate hold opportunities for researchers to better understand industry dynamics and cultural impact, and for organizers, policymakers, and industry actors to make more informed, data-driven decisions. We hope our proposed methodological approach to festival data paves way for more comprehensive film festival studies and large-scale quantitative cultural event analytics in general.

The complex basal morphology and ice dynamics of the Nansen Ice Shelf, East Antarctica

Abstract. Ice shelf dynamics and morphology play an important role in the stability of floating bodies of ice by driving fracturing that can lead to calving, in turn impacting the ability of the ice shelf to buttress upstream grounded ice. Following a 2016 calving event at the Nansen Ice Shelf (NIS), East Antarctica, we collected airborne and ground-based radar data to map ice thickness across the shelf. We combine these data with published satellite-derived data to examine the spatial variations in ice shelf draft, the cause and effects of ice shelf strain rates, and the possibility that a suture zone may be channelizing ocean water and altering patterns of sub-ice-shelf melt and freeze-on. We also use our datasets to assess limitations that may arise from relying on hydrostatic-balance equations applied to ice surface elevation to determine ice draft morphology. We find that the Nansen Ice Shelf has a highly variable basal morphology driven primarily by the formation of basal fractures near the onset of the ice shelf suture zone. This morphology is reflected in the ice shelf strain rates but not in the calculated hydrostatic-balance thickness, which underestimates the scale of variability at the ice shelf base. Enhanced melt rates near the ice shelf terminus and in steep regions of the channelized suture zone, along with relatively thin ice in the suture zone, appear to represent vulnerable areas in the NIS. This morphology, combined with ice dynamics, induce strain that has led to the formation of transverse fractures within the suture zone, resulting in large-scale calving events. Similar transverse fractures at other Antarctic ice shelves may also be driven by highly variable morphology, and predicting their formation and evolution could aid projections of ice shelf stability.

Sound and noise exposure dosimetry at large-scale music events and festivals

Regulations governing sound exposure at amplified-music events aim to protect the audience from hearing damage. However, current level monitoring practices often rely on a single measurement position that is considered representative of individual exposure, overlooking crucial variation. This study addresses this lacking insight by analyzing individual dosimeter-based sound-level exposure at music events and its relation to existing guidelines. Dosimeters secured to 42 individual participants (19 females, aged 18–25) recorded octave bands and A/C-weighted sound levels at six large-scale music events (+20.000 visitors). Individual exposure durations varied between 4.4 and 22 hours. Comparisons of exposure were made against local, German and WHO regulations. At four out of six events, individual doses surpassed the WHO’s 100 dBA recommendation, with most subjects also exceeding the ISO1999 occupational limit and the WHO’s 100 dBA-for-4-hours threshold (16Pa2h). Equivalent exposures ranged between [85.2,104.5] dBA (LA,eq) and [97.1,119.6] dBC (LC,eq) among participants. Additionally, LC,peak values fluctuated between [133.6,143.5] dBC. These findings highlight a discrepancy between the fixed-location noise exposure monitoring, as per country-specific legislation, and the actual individual exposure experienced by event attendees. Our results can inspire safe-listening guidelines for such music events, or help in deciding which single position measure is most representative. Work supported by UGent BOF-IOP EarDiMon and dBControl

Doomscrolling and mental well-being in social media users: A serial mediation through mindfulness and secondary traumatic stress.

Considering that large-scale events such as natural disasters, epidemics, and wars affect people all over the world through online news channels, it is inevitable to investigate the impact of following or avoiding negative news on well-being. This study investigated the effect of doomscrolling on mental well-being and the mediating role of mindfulness and secondary traumatic stress in social media users. A total of 400 Turkish adults completed scales to assess doomscrolling, mental well-being, mindfulness, and secondary traumatic stress. The average age of the participants was 29.42 (SD = 8.38; ranged = 18-65). Structural equation modeling was conducted to examine the mediating roles of mindfulness and secondary traumatic stress in the relationship between doomscrolling and mental well-being. Mindfulness and secondary traumatic stress fully mediated the relationship between doomscrolling and mental well-being. The results are discussed in light of existing knowledge of doomscrolling, mental well-being, mindfulness, and secondary traumatic stress. High levels of doomscrolling, which is related to an individual's mental well-being, can predict the individual's distraction from the here and now and fixation on negative news. This situation, in which mindfulness is low, is related to the individual's indirect traumatization and increased secondary traumatic stress symptoms in the face of the negative news he/she follows.

Implementation of positive psychology to surmount demoralization caused by a cataclysm in select works of Svetlana Alexievich.

Cataclysm refers to a large-scale and violent event involving disaster, catastrophe, calamity, and tragedy. The recent surge of a pandemic (coronavirus disease 2019 (COVID-19)), humanitarian crisis in Sudan, civil unrest, and war, such as the attacks in Syria and Ukraine, reiterate the need to address the trauma attached to such catastrophes. This study focuses on adapting positive psychology, one of the newest branches of psychology to emerge, to help human beings prosper and lead healthy, happy lives. It also explores post-traumatic stress disorder (PTSD) and means to overcome traumatizing psychological dejection caused by such mishaps. Demoralization is the immediate effect caused on victims and survivors of such devastations. A comprehensive study of cataclysm and demoralization is concomitant with the suffering produced by various factors pertaining to mass annihilation. A deductive methodology is incorporated into the qualitative data to analyze the oral testimonies of war and disaster survivors in Svetlana Alexievich's works titled Zinky Boys: Soviet Voices from the Afghanistan War, Second Hand Time, The Unwomanly Face of War and Chernobyl Prayer. Interpretation of the polyphonic voices in the oral sagas of interviewees in Alexievich's works reveals an increased level of anxiety, stress, and trauma post-catastrophic events. The implementation of positive psychology has been identified as an appropriate psychological intervention to address the issues related to psychological devastation.

Insights from Dikes for Multistage Granitic Magmatism in the Huayangchuan Uranium Polymetallic Deposit, Qinling Orogen

The Huayangchuan U-polymetallic deposit in the Qinling Orogen is a newly verified carbonatite-hosted deposit on the southern margin of the North China Craton (NCC) in Central China. Granitic magmatism is extensively developed in the Huayangchuan deposit area and is lacking analysis on the reasons for these situations; however, its ages, petrogenesis, and relationship with uranium mineralization are not well constrained. Zircon U–Pb ages for the hornblende-bearing granite porphyry and medium-fine-grained biotite granites in close proximity to carbonatite rocks are 229.8 ± 1.1 and 135.3 ± 0.6 Ma, respectively. High-K calc-alkaline series and weakly peraluminous Triassic hornblende-bearing granite porphyry are slightly enriched in light rare earth elements (LREE) with flat heavy rare earth element (HREE) patterns, enriched in Ba and Sr, and depleted in Nb, Ta, P, and Ti, i.e., geochemical characteristics similar to those of adakite-like rocks. The Early Cretaceous medium-fine-grained biotite granites are characterized by LREE enrichment and flat HREE patterns, which belong to high-K calc-alkaline series, and metaluminous belong to weakly peraluminous I-type granite, with U and large ion lithophile element (LILE) enrichment and high field strength element depletion. The high initial 87Sr/86Sr ratios and enriched Nd (εNd(t) = −10.7 to −9.5 and −19.9 to −18.9, respectively) and Hf (εHf(t) = −21.8 to −13.0 and −30.5 to −19.0, respectively) isotopes revealed that both granitic rocks from the Huayangchuan deposit mainly originated from lower crustal materials, generated by partial melting of the ancient basement materials of the Taihua Group. Triassic hornblende-bearing granite porphyry is significantly different from the mantle origin of the contemporaneous U-mineralization carbonatite. In combination with tectonic evolution, we argue that the Qinling Orogenic Belt was affected by the subduction of the North Mianlian Ocean during the Late Triassic. The ongoing northward subduction of the Yangtze Craton resulted in crustal thickening, forming large-scale Indosinian carbonatites, U-polymetallic mineralization, and contemporaneous intermediate-acid magmatism. Additionally, due to the tectonic system transformation caused by Paleo-Pacific Plate subduction, intracontinental lithosphere extension and lithospheric thinning occurred along the southern NCC margin in the Early Cretaceous. Intense magma underplating of the post-orogeny created a large number of magmatic rocks. The tremendous heat could have provided a thermal source and dynamic mechanism for the Yanshanian large-scale U-polymetallic mineralization events.

Petrogenesis of Late Mesozoic trachydacites in the Jiaolai Basin, Eastern China: Implications for the destruction of the North China Craton

The North China Craton has witnessed a large-scale lithospheric thinning event in the Mesozoic. The volcanic rocks of the Qingshan Group formed during the destruction of the North China Craton, therefore retaining important information to the deep processes in this region. Zircon U-Pb dating and geochemical analyses have been carried out on volcanic rocks of the Qingshan Group collected from southeastern margin of the Jiaolai Basin. In combination with previously published data on the volcanic rocks of the Qingshan Group, the newly acquired data show that: (1) the volcanic rocks of Qingshan Group in Mashan have SiO2 content of 62.82 ∼ 66.3 wt% and total alkali content (K2O + Na2O) of 7.64 ∼ 9.34 wt%. According to TAS diagram, they belong to trachydacite which experienced strong fractionation between LREEs and HREEs with depletion of HFSEs and enrichment of LILEs. (2) The crystallization age of trachydacite in Mashan is 116.4 ± 2.3 Ma (MSWD = 1.9, n = 9). The magma originated from the partial melting of the ancient lower crust and the enriched lithospheric mantle metasomatized by the fluids/melts released from the subducted slab of the Yangtze Craton. (3) The formation age of magmatic rocks in western Shandong is generally earlier than that in eastern Shandong, while the lower crust delamination in western Shandong preceded that in eastern Shandong. The occurrence of magmatism in eastern Shandong is probably attributed to the delamination process in western Shandong as well as the ongoing tectonic activities along the Tan-Lu fault zone. The lithospheric thinning of the North China Craton was mainly controlled by the change of the subduction angle of the Paleo-Pacific plate, and is probably influenced by the continuous activity of the Tan-Lu fault zone in eastern Shandong.

Preparing for 2024 Total Solar Eclipse: Mining Social Media Data to Understand Spectator Experience

This study analyzes visitor dynamics during the 2017 Total Solar Eclipse in Southern Illinois using data from X (formerly known as Twitter). Focusing on spatial and temporal patterns, we identified key visitor clusters and sentiments. The majority of visitors originated from Chicago, IL, Nashville, TN, and St. Louis, MO. Findings revealed concentrated activities in specific locations, with generally positive experiences shared on social media. Insights gained will aid in planning for the upcoming 2024 eclipse, enhancing visitor experiences and economic benefits for the region. This research underscores the value of social media data in understanding and managing large-scale events in rural areas.

Sports branding as an object of scientific analysis based on the study of publications in the international scientometric database Web of Science Core Collection

Sports branding is a systematic process of communication with a mass audience, aimed at creating a special sports culture: understanding the need to maintain a healthy lifestyle; maintaining interest in sports activities; formation of a positive image of the country through large-scale events, etc. Branding technologies are currently actively used not only by sports clubs, individual athletes, public authorities, but also by non-profit physical culture and sports organizations. The study is aimed at systematizing modern scientific ideas about sports branding. Sports branding literature included in the Web of Science Core Collection database for the period 2005 to 2023 was examined. Bibliometric methods of information processing were used in the context of sports branding. VOSviewer software was used for visual analysis in terms of publication, author, country, journals, citations and keywords with construction of bibliometric maps, visualization of cluster density, weight - citations. After screening, a total of 388 publications from the Web of Science database were included. The constructed bibliometric maps made it possible to determine the most popular areas of research to study the problem under study: sports branding as an effective tool for forming the country's image; branding of sports events; social media as a tool for sports branding; the importance of brands in the professional sports industry; athletes personal branding. The use of the VOSviewer program, version 1.6.18, made it possible to provide a comprehensive analysis of the problem, to identify priority research areas in this area: the principles of using sports branding as a mechanism for constructing a territorial brand, as well as technologies for promoting sports brands in social media.

The “sports wars”: A contest theory approach to cities hosting game

The competition among cities to host a sports team or a large-scale international sports event is modeled as a winner-pay contest with an entry fee. In the first stage, each contestant (city) decides whether to pay the entry fee (infrastructure required by the team, for example), which allows it to participate in the second stage, that is, the actual contest. We show that the contest organizer’s choice of the optimal entry fee does not depend on the number of contestants. Furthermore, in some cases, the result is a form of zero-sum game, in which the sports team or event organizer is the main beneficiary. The findings shed light on this type of competition and under what conditions on the entry fee a city might benefit from hosting a sports team or large-scale international sports event.

A Coupled SFM-ASCRIBE Model To Investigate the Influence of Emotions and Collective Behavior in Homogeneous and Heterogeneous Crowds

The understanding of crowd behavior dynamics holds immense significance in ensuring public safety across a range of situations, including emergency evacuations and large-scale events. Our research focuses on two primary objectives: investigating the impact of emotions on crowd movement and gaining valuable insights into collective behavior within crowds. To achieve this, we present a coupled model, incorporating an enhanced ASCRIBE model with an agent displacement model. We introduce heterogeneity into our model by incorporating specific mobility laws for different categories of panicked crowds, considering the influence of emotions on both speed and direction. Through numerical simulations, we analyze the model's parameters, observe the behavior of uniform crowds, and explore the collective dynamics within diverse crowds. By conducting comprehensive simulations and analyses, the findings from this study can contribute to the development of more effective crowd management strategies and emergency evacuation protocols.