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Discover the principles of wireless power transfer for unmanned aerial vehicles, from theoretical modelling to practical applications. This essential guide provides a complete technical perspective and hands-on experience. It combines in-depth theoretical models, such as T-models and M-models, with practical system design, including wireless charging system construction. It presents systematic solutions to real-world challenges in UAV wireless charging, such as mutual inductance disturbances and lightweight units. Providing the resources to tackle complex industry problems this book covers the latest technological insights including advanced control methods, such as PT-symmetric WPT system control schemes and charging range extension techniques. Ideal for professional engineers, designers, and researchers, it provides the tools needed to innovate in UAV technology and power systems. Whether you're developing new systems or optimizing existing ones, this comprehensive resource delivers the insights and techniques to drive progress in wireless power transfer for unmanned aircraft.
The International Monetary Fund (IMF) has emerged as a key player in climate policy. The organization introduced its Climate Strategy in 2021 and established the Resilience and Sustainability Facility in 2022 to provide financial support to countries facing adaptation and mitigation challenges. The IMF's closer engagement with the economic dimensions of climate change holds the promise of helping countries pre-empt large-scale economic dislocations from climate risks. But how much progress has the IMF made in supporting the green transition? What is the policy track record of the IMF's climate loans? How do regular IMF loans and mandated reforms encompass climate considerations? How have the IMF's economic surveillance activities considered climate risks? Based on new evidence, the findings in this Element point to the multifaceted, and at times contradictory, ways green transition objectives have become embedded within IMF activities. This title is also available as Open Access on Cambridge Core.
Erwin Schrödinger's What Is Life? is one of the most celebrated scientific works of the twentieth century. However, like most classics, it is far more often cited than read. Efforts to seriously engage with Schrödinger's arguments are rare. This Element explores how well his ideas have stood the test of time. It argues that Schrödinger's emphasis on the rigidity and specificity of the hereditary material (which stemmed from his attempt to explain biological order from physical principles) influenced how molecular biologists conceptualized macromolecules, resulting in a deterministic, engineering view of the cell that is still popular today—even if it is increasingly at odds with experimental findings. Drawing on archival sources, this Element also uncovers Schrödinger's motivations in writing What Is Life? and suggests that his biological proposals are best understood in the context of his longstanding dispute with other physicists regarding the interpretation and extension of quantum mechanics.
This Element examines China's evolving relations with the Bretton Woods institutions (BWIs), specifically the International Monetary Fund and the World Bank Group from the 1980s through 2025. Using a combination of new qualitative findings and quantitative datasets, the authors observe that China has taken an evolving approach to the BWIs in order to achieve its multiple agendas, acting largely as a 'rule-taker' during its first two decades as a member, but, over time, also becoming a 'rule-shaker' inside the BWIs, and ultimately a new 'rule-maker' outside of the BWIs. The analysis highlights China's exercise of 'two-way countervailing power' with one foot inside the BWIs, and another outside, and pushing for changes in both directions. China's interventions have resulted in BWs reforms and the gradual transformation of the global order, while also generating counter-reactions especially from the United States. This title is also available as Open Access on Cambridge Core.
Gerald Gardner (1884–1964) provided the central inspiration for Wicca, as a modern, revived, form of Pagan witchcraft. As such, his cultural and religious significance has grown exponentially over the 60 years since his death. 'A Rough Magic' re-evaluates the sources of Gardner's inspiration, redefines his early life within the context of colonial Malaya and the opium trade, and emphasises his vision and ability in fashioning an entirely new synthesis of magical beliefs drawn from both Eastern and Western traditions. In so doing, he stripped away the demonic elements of witchcraft and emphasised Wicca as a creative, mutable and undogmatic nature religion, serving as both fertility cult and a unique source of personal empowerment, that was capable of transforming the world.
The COVID-19 pandemic and associated lockdowns raised concerns about their impact on substance use among young people.
Objectives/Aims:
The aim of this study is to investigate the potential changes in alcohol and drug-related medical hospital admissions during the pandemic compared to pre and post pandemic years among individuals aged 15–24 in Ireland.
Methods:
Data from the Hospital Inpatient Enquiry (HIPE) database, covering emergency hospital admissions from 2017 to 2022, were analysed. Lockdown and control periods were identified, and admission rates for drug-related hospital admissions (DRHA) were calculated per population and per 100 all-cause admissions. The study also examined changes in alcohol-related hospital admissions (ARHA) and explored the contribution of different drug categories to DRHA during lockdowns.
Results:
We found that there was an increase in drug-related hospital admissions (DRHA) among individuals aged 15–24 years during the periods of hard lockdowns, comparing the three periods of hard lockdown from 2020 to 2021 with corresponding weeks in control years. The median rate of DRHA per million per week during the lockdowns was 23.8 (inter-quartile range [IQR] 19.0 – 29.9) while it was 18.2 (IQR 13.7–22.2) during the control weeks (p<0.001). DRHA accounted for a median 3.81% of admissions during lockdown weeks while they comprised 2.16% during the control weeks.
Conclusions:
Our findings suggest that an adverse effect of pandemic restrictions appears to be increased acute drug-related problems requiring medical management among youth aged 15–24 years.
Everyone is talking about bots. Much of the discussion has focused on downsides. It is too easy to use bots to cheat, but there are also many ways to use bots to improve your writing. Good writers use thesauruses. It is not cheating to use bots as a modern version of a thesaurus. It is also not cheating to use recommendation systems in a responsible way.
Theoretical perspectives propose that positive childhood experiences (PCEs) are associated with adult mental health symptoms. The aim of the current study was to conduct a meta-analysis to evaluate the correlations between PCEs and adult mental health symptoms. 41 unique studies (N = 74,492) were included. Significant, negative, medium-to-large, effects were observed between PCEs and each mental health symptom (medium-to-large for overall mental health: r = −.268; and depression: r = −.273; for anxiety: r = −.246; and PTSD: r = −.243), indicating that higher levels of PCEs are linked to fewer mental health difficulties in adulthood. Meta-regression analyses identified current age at the time of mental health assessment and adverse childhood experiences (ACEs) as significant moderators. Specifically, the promotive effects of PCEs were stronger among younger adults and weakened with higher ACEs exposure, particularly in relation to overall adult mental health symptoms, depression, PTSD, and anxiety. In contrast, no significant moderation effects were found for sex or the type of PCEs measurement tool used. Integrated prevention frameworks that combine ACEs prevention with PCEs promotion can enhance mental health across the lifespan by addressing both risk and promotive pathways and providing developmentally tailored support.
This article examines Conor Cruise O’Brien’s ideas about historical objectivity and the craft of the historian. Drawing on a mix of published material and unpublished manuscript sources, it charts the evolution of the thinking of a key Irish public intellectual about how historians should write history and how their work should relate to their contemporary world. It identifies several unacknowledged intellectual debts O’Brien owed to influential twentieth-century thinkers — namely, the philosophers Michael Oakeshott and Maurice Merleau-Ponty and the sociologist C. Wright Mills. The article challenges the claim that O’Brien’s view of historiography underwent significant changes in response to the outbreak of violence in Northern Ireland during the late 1960s. On the contrary, it is argued that O’Brien’s thinking on these themes remained fundamentally unchanged from the mid 1950s until the end of his long career as a public intellectual.
Community-acquired methicillin-resistant Staphylococcus aureus (CA-MRSA) is a significant public health concern, disproportionately affecting socioeconomically disadvantaged populations, including individuals experiencing poverty, homelessness, incarceration, and injection drug use. This scoping review synthesizes existing literature on factors influencing CA-MRSA occurrence and community transmission in these populations. A comprehensive search of PubMed, MEDLINE, and Scopus for studies published between January 2000 and February 2024 identified 3,223 articles, of which 40 met the inclusion criteria. Findings indicate that the CA-MRSA burden remains high, with community transmission influenced by factors, such as limited access to hygiene resources, structural barriers to care, and social network dynamics. Surveillance and intervention strategies remain largely healthcare-focused, with limited data on community-level transmission and risk. This review highlights the urgent need for targeted public health interventions and the adoption of expanded, innovative surveillance methods, such as genomic epidemiology, to better track and mitigate CA-MRSA transmission in vulnerable populations. As antibiotic resistance continues to rise, future research should prioritize longitudinal studies and community-based surveillance to develop effective, population-specific infection prevention, and control strategies.
To evaluate the impact of implementation of a conditional reflex urine culturing strategy on urine culture rates, antimicrobial use, and clinical outcomes in hospitalized adults.
Design:
Pre-post quasi-experimental study.
Setting:
Emergency departments and inpatient units within a large, integrated healthcare system in Northeast Ohio, comprising 10 medical centers.
Patients:
Adult patients with a urine culture ordered from June 1, 2018, to May 31, 2023.
Methods:
A system-wide intervention was implemented on June 1, 2020, requiring urinalysis (UA) with pyuria findings to trigger a urine culture order. We compared urine culture rates, antimicrobial use (measured by days of therapy [DOT] and days of antimicrobial spectrum coverage [DASC]), and clinical outcomes between pre-and post-intervention periods.
Results:
The intervention resulted in an 85.4% reduction in urine culture rates (0.54 vs 3.71 per 100 patient days). Antimicrobial use decreased, with DOT per 100 patient days dropping by 11.5% and DASC/DOT by 16.1%. No significant differences were observed in Clostridioides difficile infection rate, subsequent bloodstream infections with urinary pathogens, or mortality between pre- and post-intervention groups.
Conclusions:
A conditional reflex urine culturing strategy implemented as part of a diagnostic stewardship framework reduced urine culture and antimicrobial use without adverse clinical outcomes. This highlights the potential of diagnostic stewardship to optimize antimicrobial use in hospitalized adults.
Quarries are information-rich anthropic landscapes, but their unique characteristics often limit the effectiveness of traditional archaeological documentation strategies. Here, the authors present a novel interdisciplinary method for the documentation and analysis of these landscapes, focusing on two ancient marble quarries on the Mediterranean island of Naxos. The workflow, combining lidar, photogrammetry, sculptural and architectural study, geoscience, ecological study and archaeological survey, provides a means for the systematic documentation of quarry landscapes in the Mediterranean and beyond, and aims to promote an understanding of premodern extractive activities not as isolated occurrences but as important aspects of interconnected, evolving landscapes.
This study aims to assess the knowledge and determine the level of compliance with human immunodeficiency virus (HIV) post exposure management (PEM) among dentists.
Design:
A descriptive cross-sectional study was done among 114 dentists.
Setting:
Study was done among dentists in two Nigerian tertiary hospitals.
Participants:
All dentists available, who consented to the study during the period of data collection were included in the sample. Three cadres of dentists; house officers, residents and consultants, were involved in the study.
Methods:
Using self-administered questionnaires, information was sought on knowledge of managing exposures-first aid and prophylaxis as well as compliance when exposed. Data was analyzed using the SPSS statistical software.
Results:
Nearly all respondents, 111(97.4%), reported having heard about HIV PEM. Exposure incidents most frequently identified by respondents were needlestick injuries, 111(97.4%). Majority of the dentists recognized practices such as flushing exposed mucous membranes with water, 97(85.1%), and washing skin injuries with soap and water, 75(65.8%), as first aid for exposure incidents, while 20(17.5%) endorsed inappropriate measures like applying bleach to the wound. Seventy-one (62.3%) reported awareness of a HIV PEM protocol in their institution while 39(33.3%) were uncertain, with only 25(21.9%) reporting routine practice of the protocol. Fifty-six (49.1%) of the respondents had experienced an exposure of which only 30(53.6 %) reported and 32(57.1%) requested blood tests for the source patient(s).
Conclusion:
The level of compliance with post exposure management is inadequate, therefore there is a need to update the knowledge and device methods of encouraging compliance with HIV PEM protocol among dentists.
An I.R.B. supreme council member and the I.R.A. 2nd Northern Division commandant, Charlie Daly was executed at Drumboe on 14 March 1923. Daly’s case shows how, through I.R.B. auspices, Free State G.H.Q. planned a joint northern offensive with republicans to avert civil war, while deploying the resources of the new state (and false promises) to engineer the support or at least neutrality of the Northern I.R.A. Eoin O’Duffy and Richard Mulcahy connived to remove Daly from his command because of his opposition to the Treaty, with events coming to a head at the ‘Beggar’s Bush inquiry’ on 2 March 1922. In due course, the Free State elite killed every senior republican brother party to the northern intrigue, including Joe McKelvey and Daly, the latter of whom was shot alongside Seán Larkin from Derry — a witness to GHQ ‘crookedness’ the previous March.
We identify a parsimonious set of factors from a large pool of candidates for explaining hedge fund returns, ranging from equity market, anomaly, and trend-following factors to macroeconomic factors. The resulting 9-factor model, including five anomaly factors, outperforms existing hedge fund models both in sample and out of sample, with a significant reduction in alphas while showing substantial cross sectional performance heterogeneity. Further analysis based on fund holdings confirms the model’s ability to capture returns from arbitrage trading. Overall, the anomaly factors help quantify hedge fund strategies and risk exposures and improve fund performance evaluation.
Vibration control in structures is essential to mitigate undesired dynamic responses, thereby enhancing stability, safety, and performance under varying loading conditions. Mechanical metamaterials have emerged as effective solutions, enabling tailored dynamic properties for vibration attenuation. This study introduces a convolutional autoencoder framework for the inverse design of local resonators embedded in mechanical metamaterials. The model learns from the dynamic behaviour of primary structures coupled with ideal absorbers to predict the geometric parameters of resonators that achieve desired vibration control performance. Unlike conventional approaches requiring full numerical models, the proposed method operates as a data-driven tool, where the target frequency to be mitigated is provided as input, and the model directly outputs the resonator geometry. A large dataset, generated through physics-informed simulations of ideal absorber dynamics, supports training while incorporating both spectral and geometric variability. Within the architecture, the encoder maps input receptance spectra to resonator geometries, while the decoder reconstructs the target receptance response, ensuring dynamic consistency. Once trained, the framework predicts resonator configurations that satisfy predefined frequency targets with high accuracy, enabling efficient design of passive controllers of the syntonized mass type. This study specifically demonstrates the application of the methodology to resonators embedded in wind turbine metastructures, a critical context for mitigating structural vibrations and improving operational efficiency. Results confirm strong agreement between predicted and target responses, underscoring the potential of deep learning techniques to support on-demand inverse design of mechanical metamaterials for smart vibration control in wind energy and related engineering applications.
This forum contribution explores the strengths and limits of Noam Yuran’s innovative call for a new political economy of sex and desire. It has three prongs. First, I discuss Yuran’s compelling focus on the curious durability of monogamy as an institution. Second, I examine his analysis of thinkers such as Mandeville and Weber. Finally, I turn to the question of love. I suggest that Yuran’s approach opens a pathway to a more loving and more realistic political economy of intimacy and familial love, one that I suggest is missing in much critical theory today, particularly in the rhetoric of family abolitionists.
The Great Depression era provides a natural experiment to study the effects of employee stock ownership on productivity due to the unexpected nature of the stock market crash in 1929 and the predetermined expiration of employee stock offerings staggered throughout the 1930s. I collect information on employee stock ownership from reports by the National Industrial Conference Board, annual company reports and other primary sources, and then merge them with the US Census of Manufactures to form the main establishment-level dataset. The results indicate that companies with active programs had significantly lower establishment-level output growth and fewer hours worked per employee than firms with inactive ESOPs post-crash. These negative effects, however, can be mitigated in smaller firms where employees feel their effort level has non-negligible effects. To my knowledge, this is the first study to empirically investigate these early ESOPs as well as address how continuing an employee stock ownership program during a financial crisis affects productivity.