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Maritime navigation in low visibility presents a significant challenge, jeopardising seafarers’ situational awareness and escalating collision risks. This study introduces a maritime head-up display (mHUD) to address this issue. The mHUD, a 2-m diameter aluminium ring with dual rows of LEDs, enhances visibility for autonomous ships in adverse conditions on ship bridges and remote operating centres (ROCs). Displaying various modes such as shallow waters, land, lighthouses, beacons, buoys and maritime traffic, the mHUD was evaluated in a ship bridge simulator by 12 navigation students. Results revealed that the mHUD substantially improved situational awareness, proving more efficient and effective than navigating without it in poor visibility conditions. Participants found the mHUD easy to learn and expressed willingness to use it in real-world situations. The study highlights the mHUD’s potential to enhance situational awareness on ship bridges and ROCs for autonomous ships, while suggesting potential enhancements to increase usability and user satisfaction.
Accurate typhoon track nowcasting is vital for navigation and coastal disaster prevention. This research integrates a Large Language Model (LLM) with Retrieval-Augmented Generation (RAG) technology for typhoon path prediction. Leveraging LLMs as the predictive foundation, the approach tailors forecasts to individual typhoon characteristics. The methodology involves collecting satellite imagery, standardizing data, and employing optical flow methods to track typhoons and derive path coordinates. These coordinates are preprocessed and embedded into the LLM. RAG enhances the LLM’s predictive performance, enabling effective forecasting. Increasing typhoon-specific embedded data further improves accuracy. Using the FY-4 dataset, the method achieved an average absolute error of 10.78 km in 12-hour predictions. The study demonstrates that LLM-RAG integration excels in nowcasting.
Global Navigation Satellite System (GNSS) positioning accuracy is challenged due to abnormal signals in harsh environments. This study proposes an approach for multiple and mixed abnormal measurement processing in multi-GNSS positioning and navigation based on the resilient a priori innovation and posterior residual (PR) for harsh environments. Specifically, first, both static and kinematic processing modes are considered when calculating the innovation vector (IV). Second, observations are classified and abnormal measurements are eliminated based on the different observation accuracies of different GNSS systems within the resilient IV method. Finally, the resilient PR method considers the total number of redundant observations. Compared with the traditional IV and PR method, the RIP method improves the positioning accuracy by approximately 30.2% and 58.0% in static experimental datasets No. 1 and No. 2, respectively. In the kinematic experiment, it improves the ambiguity success rate and positioning accuracy by approximately 41.5% and 86.7%, respectively.
Analog and digital electronics are an important part of most modern courses in physics. Closely mapped to the current UGC CBCS syllabus, this comprehensive textbook will be a vital resource for undergraduate students of physics and electronics. The content is structured to emphasize fundamental concepts and applications of various circuits and instruments. A wide range of topics like semiconductor physics, diodes, transistors, amplifiers, Boolean algebra, combinational and sequential logic circuits, and microprocessors are covered in lucid language and illustrated with many diagrams and examples for easy understanding. A diverse set of questions in each chapter, including multiple-choice, reasoning, numerical, and practice problems, will help students consolidate the knowledge gained. Finally, computer simulations and project ideas for projects will help readers apply the theoretical concepts and encourage experiential learning.
The Harms of Beauty has offered an insight into the wider life-worlds of consumers and sellers, following them not only as they engage with licit and illicit beauty markets, but also through their attempts to navigate a society characterized by hyper-comparison, hyper-consumption and competitive individualism. Recognizing the importance of online commerce and the internet, the empirical evidence from observations and interviews within online spaces (for example, social media sites, Facebook, Instagram and YouTube) has provided an understanding of the relationship between digital technologies, criminological activity, harm and the beauty industry. The concluding chapter will tie together the book's empirical findings with the theoretical context of this study. In doing so, it will answer the fundamental questions of why these young people use and sell counterfeit and illicit beauty products, and how they engaged with these products, before offering some recommendations to address these problems.
Aims of the book
This book set out to address the significant gap in knowledge regarding the broad range of harms related to the licit, illicit and counterfeit beauty industry and the willingness of individuals to self-harm and inflict harm on others and the environment in the pursuit of self-interest and ‘ideal’ perfection. Using life testimonies of young people, including numerous observations, informal conversations and interviews, I have tried to offer an alternative understanding of young people's involvement in illicit markets. In forging strong theoretical connections between harmful actions and the wider economic, social and cultural forces, structures and processes, this book offers a vital contribution to the criminological literature on counterfeits, crime and harm.
Measurements in high-speed flows are difficult to acquire. To maximise their utility, it is important to quantify the preceding events that can influence a sensor signal. Flow perturbations that are invisible to a sensor may prevent the detection of key physics. Conversely, perturbations that originate away from a sensor may impact its signal at the measurement time. The collection of the latter perturbations defines the domain of dependence (DOD) of the sensor, which can be evaluated efficiently using adjoint-variational methods. For Mach 4.5 transitional flat-plate boundary layers, we consider the DOD of an instantaneous and localised wall-pressure observation, akin to that by a piezoelectric probe. At progressively earlier times prior to the measurement, the DOD retreats upstream from the probe, and the sensitivity to flow perturbations expands spatially and is amplified. The expansion corresponds to a wider region where initial disturbances can influence the measurement, and the amplification is because these perturbations grow during their forward evolution before reaching the probe. The sensitivity has a wavepacket structure concentrated near the boundary-layer edge, and a portion that radiates into the free stream. The DOD is further interpreted as the optimal initial perturbation with unit energy that maximises the norm of the measurement, establishing a link to transient-growth analysis. We test this formulation for a laminar condition and contrast the sensor dependence on different components of the state vector. When the boundary layer is transitional, we adopt the general formulation to assess the impact of sensor placement within the transition and turbulent zones on the DOD, and we characterise the flow disturbances that most effectively influence the measurement in each regime.
It is a great pleasure being given the opportunity to introduce Sam Barnes’ first book to readers. As one of Barnes’ supervisors of her PhD thesis, which this book is based upon, I was able to personally witness her systematic approach, hard work and resourcefulness in the field, which the end-product is a testament to. The Harms of Beauty is an original work, which fully does what it promises: ‘it explores the wide array of harms associated with legal, illegal and counterfeit markets within the beauty industry to develop an understanding of supply and demand beyond a traditional criminological framework’. Written with the crispness that is the result of state-of-the-art knowledge, this impeccably organized book is based on eight chapters that seamlessly link to one another, covering both the demand and the supply side of an industry with an overlooked sinister side.
Drawing upon advances in ultra-realism, zemiology and deviant leisure (see Hall and Winlow, 2015; Raymen and Smith, 2019), Barnes theorizes on the changing nature of identity, leisure and consumption in late capitalism (see also Hall, 2019). The work is based on a remarkable methodological effort: an ethnographic, ‘offline’ study in a town in the southeast of England, which Barnes refers to as ‘Beaufort’, as well as observations and interviews carried out in relevant settings in East London, neighbouring towns to ‘Beaufort’ and in online spaces.
Barnes offers an extremely rich account on the changing nature of beauty and fashion, and shows how within this context, harmful practices are not only accepted but also widely celebrated.
The attachment-line boundary layer is critical in hypersonic flows because of its significant impact on heat transfer and aerodynamic performance. In this study, high-fidelity numerical simulations are conducted to analyse the subcritical roughness-induced laminar–turbulent transition at the leading-edge attachment-line boundary layer of a blunt swept body under hypersonic conditions. This simulation represents a significant advancement by successfully reproducing the complete leading-edge contamination process induced by a surface roughness element in a realistic configuration, thereby providing previously unattainable insights. Two roughness elements of different heights are examined. For the lower-height roughness element, additional unsteady perturbations are required to trigger a transition in the wake, suggesting that the flow field around the roughness element acts as a perturbation amplifier for upstream perturbations. Conversely, a higher roughness element can independently induce the transition. A low-frequency absolute instability is detected behind the roughness, leading to the formation of streaks. The secondary instabilities of these streaks are identified as the direct cause of the final transition.
Having introduced the theoretical frameworks of this book, the following chapter provides a theorization of the changing nature of beauty, style and fashion. Various historical and contemporary normalized, accepted and culturally celebrated harmful and harming practices will be explored, emphasizing how fashion and style have long shown a connection with harmful and harming practices. Following this, an examination of how late modernity has accelerated and amplified the harmful and harming practices and processes related to the use and supply of beauty and fashion will be unpacked, highlighting the extent to which potential harms exist on a larger scale than previously recognized. As such, this chapter continues to explore the hyper-connectedness of consumers and sellers and the online and offline.
A history of fashion trends and harmful practices
Fashion before neoliberalism
Fashion and style have been an integral part of human culture for centuries. While trends are constantly changing and vary across cultures, the extent to which individuals will go to stay abreast with new styles has been consistent throughout history and dates back to periods preceding the dominance of neoliberal ideology (David, 2015). From fashionable clothing that has led to mechanical alterations and modifications of the natural body, to extreme dieting to achieve a certain body shape, individuals have long engaged in practices that can cause significant harm to the self and the broader societal and environmental landscapes.
Fashion trends have traditionally been heavily gendered, with certain styles and body shapes associated with masculinity and femininity (Grogan, 2022).
In this chapter the ontological and epistemic underpinning of this book will be explored. Ultra-realist criminology and its transcendental materialist roots of subjectivity and zemiology will be introduced to provide a framework for understanding the multi-faceted cultural and corporeal motivations for buying, selling and using counterfeit illicit beauty products and services. Raymen and Smith's (2019) deviant leisure perspective that follows ultra-realism's ontological roots will also be outlined and its relevance to assess harms arising from the industry will be made clear. By drawing on these theoretical frameworks, the pernicious interconnection between the increasingly unstable and fluid job market, a culture of hyper-competitive consumer capitalism and hyper-comparison will be unpacked to better understand the research participants’ involvement in illicit markets.
Ultra-realism, subjectivity and motivation
Liberal capitalism often leads us to believe that we are self-aware, logical and autonomous individuals who freely choose to act in our best self-interest without regard for others. Such a conceptualization of the individual as having pure agency and consciously entering the nexus of social, economic and political relationships comprising ‘society’ fails to engage with the complexity of human subjectivity and the unequal distribution of resource and opportunity. In failing to consider this complexity it is impossible to fully grasp how and why individuals continually and knowingly engage with a consumer culture that perpetuates harm for themselves, for others and for our shared environment.
This book explores the wide array of harms associated with legal, illegal and counterfeit markets within the beauty industry to develop an understanding of supply and demand beyond a traditional criminological framework. Drawing upon data from a detailed ethnographic study, this book examines a small population of beauty-dependent consumers attempting to navigate a society characterized by hyper-comparison, hyper-consumption and competitive individualism. More specifically, it looks at the day-to-day struggles and challenges of young people in contemporary society as they attempt to keep up with the rising beauty standards and expectations of what is considered ‘normal’. I write this book to highlight the toxicity of the consumer culture that is driving individuals’ willingness to harm themselves, others and the environment in their pursuit of image and body perfection. The latter part of this chapter gives a more comprehensive breakdown of the book's structure, but, for now, I aim to provide insight into the ongoing expansion of the beauty industry and where the idea for this project stemmed from.
The beauty industry
The global beauty industry has seen substantial growth in recent years. In 2023 the personal care and beauty industry contributed a total of £27.2 billion to the UK's economy, an 11 per cent increase from 2022 (British Beauty Council, 2024). From skincare, haircare and make-up products to cosmetic injectables, weight management and fitness products and services, consumers today invest significant time and money to enhance their appearance. The consumption of beauty has extended beyond the everyday use and application of products to include a range of procedures, services and lifestyle choices focused on self-care, nutrition, fitness and overall wellness (Cederström and Spicer, 2015). Alongside the surging popularity of legal beauty products and services, there has been an increase in the usage of lifestyle drugs more generally (Hall, 2019; Gibbs, 2023).
Having explored the instrumental motivations of (counterfeit) beauty consumption, this chapter sets out to examine the role of hyper-comparison in online spaces and real life, including the impact it has upon human subjectivities and young people's willingness to engage in harmful acts. The use of social media has distorted ideas and views on what is natural, unnatural, realistic and unrealistic. Indeed, the development of this form of hyper-comparison is inextricably bound up with the cultural changes and technological advances taking place across the landscape of late capitalism, which have placed notions of narcissism, competitive individualism and profound insecurity at the centre of contemporary existence (Hall et al, 2008; Ayres, 2020). This chapter will paint a picture of what has driven the research participants to have these distorted views and the impact this is having on their lives.
Distorted views: young people's objective reality
The proliferation of social media has facilitated and enabled a global, real-time connectivity and engagement with friends and peers that would have been hard to imagine at the turn of the twenty-first century. This ever-present digital connectivity through networked devices has radically changed the nature of social interactions and the ways in which people spend their everyday lives. Besides David, all the participants were active on social media throughout the fieldwork and spent numerous hours a day on social media platforms. They would often sit next to their friends, endlessly scrolling through their social media newsfeeds, replying to messages and liking photos. They were interacting all day, but almost entirely through a screen. This undeniably impacted the ways in which they viewed the world.
We perform direct numerical simulations of sub-Kolmogorov, inertial spheroids settling under gravity in homogeneous, isotropic turbulence, and find that small-scale clustering, measured via the correlation dimension, depends sensitively on the spheroid aspect ratio. In particular, such spheroids are shown to cluster more as their anisotropy increases. Further, the approach rate for pairs of spheroids is calculated and found to deviate significantly from the spherical-particle limit. Our study, spanning a range of Stokes numbers and aspect ratios, provides critical inputs for developing collision models to understand the dynamics of sedimenting, anisotropic particles in general, and ice crystals in clouds in particular.
Following discussions in Chapter 2 of the paradigmatic explanatory frameworks for selling counterfeits, this chapter examines the supply-side of the online and localized offline market in Beaufort. This includes offline distribution avenues to online sellers, and the role of the internet in the local trade of beauty counterfeits. The offline distribution networks, the gym and the salon, are explored using observations and participant accounts of their legitimate and illicit working practices and the skills required for both. The online environment of illicit supply will then be unpacked, including how offline sellers procure stock from online sources, use social media platforms to learn how to ‘safely’ inject cosmetic enhancements and the role of the internet in selling and advertising illicit beauty products and services. The final section brings the first two sections together to address how backgrounds and experiences shape young people's willingness to engage in selling practices, and their positions as consumers focused on improving their identity and appearance. This chapter advances the argument that these young people's selling practices do not fit into many of the traditional explanatory frameworks for selling counterfeits, which tend to dominate criminology's theoretical repertoire.
The offline beauty marketplace
The intertwinement of licit and illicit business
Common assumptions associated with the supplying of counterfeits maintain that the sale of counterfeits is linked to organized criminal enterprise such as trafficking, terrorist funding, sexual exploitation and violent activities (Naylor, 2002; Lowe, 2006; Home Office, 2022).