19684 research outputs found
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Decoding mobility hubs:Opportunities and risks underpinning their introduction for the contexts of transport and the wider society
No full textIn an era, where, on the one hand, climate change constitutes a planet-defining threat but, on the other, technology provides unprecedented opportunities for connectivity, sharing and intelligence in transport, mobility hubs have emerged as a potential cornerstone for less car-dominated societies. Still in their infancy as a brand, mobility hubs promise to be visible, accessible, and integration-enabling spaces, where public transit, shared mobility, micromobility and active travel modes co-exist harmoniously alongside infrastructure facilities like charging and sharing stations. Yet, there are still genuine question marks around their implementation, functionality, urban fit and use. Can mobility hubs create opportunities to address effectively transport and even wider societal challenges? Are there any risks or potential side-effects when adopting them? This paper attempts to provide answers by critically reviewing the existing literature and conducting a thematic narrative analysis, identifying and contextualising the opportunities and risks behind mobility hubs' introduction, adoption and travel behaviour impact. According to our research mobility hubs, if designed appropriately, can assume positive roles becoming: an opponent for private car, a solution for any geography, a MaaS companion, a place of social abundance and a supporter of wider economy. If they are not, though, mobility hubs may be instead responsible for: environmental burdens, public indifference, discomfort by default, abuse of space and inequity problems. Our work provides a genuine platform for decoding the potential of mobility hubs exploring the often-neglected grey sides of this shared transport phenomenon by focusing not only in new, niche, shared micromobility-centric investments but also looking at rebranded transit-based mechanisms. If these opportunities are seized and side-effects avoided, then there could be a powerful business case for mobility hubs we argue.</p
High Blues Fidelity:The Fragmentary Autobiography of 'Queen' Victoria Spivey (1906-1976)
No full textOn 29 September 1963, blues singer Victoria Spivey took to the stage for her final number at the Kurhaus in Baden-Baden, West Germany. It was the opening night of the second American Folk Blues Festival (hereafter AFBF), an all-star tour that would bring African American blues musicians to new audiences across Europe. Spivey had already appeared on stage twice that evening to sing two songs that she had recorded as a 1920s ‘race’ records star: the alluring, innuendo-laden ‘Black Snake Moan’ and her tragic ‘T. B. Blues’. Her final number, in contrast, was a new composition: ‘Grant Spivey’ (Spivey 1963), a slow, reflective blues telling the story of her father, a stevedore at the port of Galveston, Texas. The song explains how her family had fled to Houston to escape racial persecution prompted by the 1900 Galveston Hurricane and memorializes her father’s untimely death in 1913. The song lyric closes with Spivey responding to her grief by moving to New York to begin her blues career...
Investigation into the tribo-dynamics of spur gear pairs considering pitch deviations and lubrication
No full textPitch deviation, one of the long-wave deviations, has been demonstrated to be a significant contributor to noise generation in the drive train of motor vehicles operating at higher speeds. Until now, numerous studies have been conducted to investigate the effects of pitch deviation on the dynamic characteristics of gear systems. However, these models often exhibit inconsistencies with real-world observations due to the simplification of the contact between teeth pairs. This simplification ignores clearance compensation and damping of the oil film. To fill this gap, a new numerical model of spur gear systems with pitch deviation considering lubrication is proposed. An analytical model of time-varying mesh stiffness (TVMS) and meshing impact force for spur gear pairs is proposed, in which the geometric relationship and iterative solution process have been investigated. An improved tribo-dynamic model is established to investigate the excitation behavior of gear pairs with pitch deviation under lubrication. The accuracy of the proposed model is verified through comparisons with references and experimental results. Results show that the random impact phenomenon of TVMS is significantly suppressed by oil film, and the meshing impact force is also reduced. The transmission stability of spur gear pairs with tooth pitch deviation is improved under lubrication. The research results provide theoretical support for accurately predicting the dynamic responses of spur gear pairs with different precision levels considering lubrication
Systematic Review and Meta-Analysis Protocol:Global Prevalence of Chronic Venous Disorders (CVDs)
No full textImproved Transfer Path Effect Model Considering Frequency Attenuation for Planetary Gear Train With Sun Gear Fault
No full textIn the vibration signal model of a planetary gear train (PGT), the transmission path effect is a crucial factor for the interpretation and understanding of its modulation mechanisms. Due to the unique structure of the PGT, it has multiple transmission paths, whose length changes over one rotation cycle, making the modulation even more complicated. Previous models have included the time-variant transmission path influence but ignored the fact that different frequencies of the vibration signal attenuate differently. Therefore, this paper constructs a novel transmission path effect function that takes into account the lengths of the signal transmission path, as well as the influence of frequency attenuation on the signal transmission. Moreover, an excitation force function incorporating rotational speed fluctuations was derived by employing Fourier series to simulate rotational speed fluctuations. Simulation studies are carried out to compare the improved vibration model with previous ones, showing that the proposed model not only reflects the meshing frequency and its sidebands but also reveals the fault characteristic frequencies and its sidebands. Finally, experimental results show that the spectrum distribution pattern of the proposed model corresponds more closely to that of the experimental signal, further confirming the validity of the proposed model.</p
Freedom to Move
No full textFREEDOM TO MOVE offers an intimate observation of Rainbow Mbuangi, a key player for Merseyside Blind Football Club. The film embeds itself within Mbuangi's daily life, documenting the structured routines, intensive training, and social world that orbit his athletic pursuits. Through a rigorous focus on sound - both the necessities of his off-field navigational aids and the specialised, rattling 'soundball' used in the game - the documentary explores the complex relationship between dependence and autonomy. On the pitch, where he is fully reliant on auditory cues, Mbuangi challenges conventional notions of athletic space and visual interpretation
Automated Logistics in the B5G/6G Era
No full textLogistics is the backbone of the global economy connecting businesses, consumers and nations through efficient movement and distribution of goods and services. This implicates for immense business opportunities and options for financial and economic growth. The challenge becomes greater via advancements in information technology, vehicle autonomy and connectivity, allowing the creation of new types of services as well as reshaping existing ones. 5G in logistics can make the movement of products easier and more accurate. 5G not only enables a multiplicity of smart devices to communicate in speeds close to real-time, but it also supports inclusion of novel applications based on Artificial Intelligence, being able to radically transform the supply chain. Most of actions within modern warehouses are performed by Automated Guided Vehicles (AGVs), allowing for many benefits such as increased safety and accuracy, reduced error rate, scalability, reduced labor cost and many more. B5G technology holds immense potential in revolutionizing logistics by enhancing connectivity, automation and efficiency. With ultra-fast data transmission speeds, embedded local AI and ultra-low latency, B5G/6G networks can facilitate real-time tracking of goods, enabling precise inventory management and supply chain optimization. This will create new business models, service opportunities and product categories. In the present work we also discuss an automated logistics use case originating from the framework of the on-going 6G-PATH EU-funded project. We discuss its context by focusing on innovative features, KPIs and KVIs and we present the corresponding testbed for the intended trials.</p
Physicochemical Properties and Angiogenic Potential of Whey Protein Isolate Hydrogels Modified with Heparin or Tinzaparin
No full textA key challenge in tissue engineering is developing functional tissues that can effectively mimic the structure and function of natural tissues. This involves creating scaffolds that support cell proliferation, and differentiation. This research aimed to develop hydrogels as scaffolds that could be utilised in tissue engineering, particularly in applications that require angiogenesis. Whey protein isolate (WPI) has been employed as the main hydrogel component, as WPI hydrogels have been investigated for possible applications in bone tissue engineering. Heparin (HP) and tinzaparin (TP) were selected as additives, as they enhance cellular growth and exhibit anti-inflammatory properties. Nine different compositions were created, each with varying percentages of the additives, a control sample containing pure WPI, and samples with HP or TP at 2.5%, 5%, 7.5%, and 10% concentrations. The mechanical tests showed compressive moduli in the range of 430–620 kPa for the modified hydrogels and indicated that a 5% content of HP or TP is optimal in terms of mechanical characteristics. The highest swelling ratios of approximately 13% and 16%, respectively were noted in both modified groups (TP and HP) at the 7.5% concentration. HP 2.5% demonstrated the highest cytocompatibility among all HP concentrations, including the WPI control, while TP 10% exhibited greater cytocompatibility than other TP concentrations, also surpassing the WPI control. All hydrogels with additives enhanced cell attachment compared to the WPI control, indicating better cytocompatibility. The morphology visualization of DPSCs indicated no significant differences between the four HP or TP concentrations. TP 10% showed the most promising results in angiogenic differentiation potential tests in vitro, suggesting this composition should be studied further
Heaviness in Metal Music Production:A Practical Guide
No full textHeaviness in Metal Music Production: A Practical Guide translates the 'Heaviness in Metal Music Production' (HiMMP) research project into an applied resource for practitioners. Based on a comparative study of eight internationally recognised metal producers working from the same multitrack session, it organises insights on heaviness around core production decisions: philosophy (Naturalistic vs Hyperreal), arrangement and performance, drum and guitar engineering, spatial design, and loudness and dynamics.The guide is aimed at metal producers, mix engineers, and advanced home recordists who want to refine their understanding of heaviness in contemporary metal mixes. It is designed for use in the studio, in teaching, and in self-directed learning, and can be read on its own or in conjunction with the project’s dataset, videos, and academic publications at www.himmp.net.As an interactive eBook that contains audio players and other media, open the guide (index.html) in a web browser to read and listen
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