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This much revised and expanded textbook offers readers a coherent, thorough understanding of midlatitude atmospheric dynamics. It is invaluable for advanced students and researchers in dynamical meteorology, geophysical fluid dynamics, and applied mathematics. The authors are some of the central players in the development of state-of-the-art research. This new edition links theory with observation using examples of real weather systems, informed by modern global data. It is structured around three themes which gradually build upon each other, so will appeal to both advanced readers and those with little prior knowledge. The first theme introduces the basics of fluid dynamics and thermodynamics; the second discusses the importance of rotation in the atmosphere; and the third explores the concept of balance to expand the discussion to more elaborate weather systems, using the 'PV thinking' conceptual framework. Sets of exercises accompany each chapter, with solutions available online.
This paper explores the historical development of management thought around the cost of public infrastructure. We argue that swings between ex post pricing and ex ante discounting as temporal frameworks within which the public, managers, politicians, and the media appraised major transport infrastructure projects constitute a dominant but unrecognized narrative. We use London in the twentieth century as a case study, identifying major changes in the 1920s and again in the 1960s which decisively rebalanced how projects were evaluated. We conclude that the current cost-benefit and ex ante discounting framework arose out of the adoption of American concepts and processes from the early 1960s onward. We think that this approach fostered rent-seeking activity and principal-agent problems, but that the empirical costs and timeframes for completing transport infrastructure have changed much less than is commonly believed in over a century.
Understanding Modern Warfare has established itself as a leading text in professional military education and undergraduate teaching. This third edition has been revised throughout to reflect dramatic changes during the past decade. Introducing three brand new chapters, this updated volume provides in-depth analysis of the most pertinent issues of the 2020s and beyond, including cyber warfare, information activities, hybrid and grey zone warfare, multi-domain operations and recent conflicts in Ukraine, Gaza, and Syria. It also includes a range of features to maximise its value as a learning tool: a structure designed to guide students through key strategic principles; key questions and annotated reading guides for deeper understanding; text boxes highlighting critical thinkers and operational concepts; and a glossary explaining key terms. Providing debate driven analysis that encourages students to develop a balanced perspective, Understanding Modern Warfare remains essential reading both for officers and for students of international relations more broadly.
This study aimed to compare Merocel and Surgicel nasal packing following inferior turbinoplasty, focusing on post-operative bleeding, pain, discomfort and nasal obstruction.
Methods
A randomised controlled trial (2017–2021) was conducted in the Department of Otolaryngology, Changi General Hospital, Singapore. Sixty adults undergoing inferior turbinoplasty and/or septoplasty were randomised to receive Merocel or Surgicel packing. Standardised surgical and post-operative protocols were used. Outcomes—bleeding, pain, discomfort and nasal obstruction—were assessed on post-operative day 1 and post-operative days 5–7 using validated scales.
Results
Fifty-eight patients completed the study (Merocel = 30; Surgicel = 28). On post-operative day 1, Surgicel had significantly lower nasal obstruction scores (1.57 ± 0.74 vs 2.10 ± 0.71; p = 0.008). By post-operative days 5–7, Merocel showed significantly less bleeding (0.77 ± 0.63 vs 1.18 ± 0.86; p = 0.044). Pain and discomfort were comparable.
Conclusion
Merocel provided superior sustained haemostasis, while Surgicel offered better early comfort. Both materials have comparable outcomes.
Emergency Department (ED) attendances have been growing worldwide for decades, the rationale for this is societal, cultural, and geographically dependent, but has not been described in detail. Increased access to primary care has been postulated as a solution; however, as the number of General Practitioners (GPs) and GP training posts has increased over the last decade in Ireland, so too has the rise in ED attendances. Detailed analysis is required on an ongoing basis to predict the Staff, staff, and space required to appropriately manage the growing cohort of attendances.
Methods:
Trend analysis of system-generated attendance reports to evaluate 10 years of attendance patterns (2014-2024) and predict potential future pinch points. Data examined in Excel.
Results:
Monthly attendances ranged from a low of 540 to a high of 5028. Average monthly attendance increased from 2657 in 2014 to 4744 in 2024. First month > 3,000 was June 2015, first month > 4,000 June 2021, and first > 5,000 attendances was May 2024.
Conclusion:
COVID lockdowns in 2020 and 2021 negatively affected attendance, as did a fire resulting in a hospital evacuation in March 2023. Determining trends in presentations and future predictions is important to ensure that staffing levels match predicted attendances and thus avoid “black escalation” and offload delay. The first time attendances exceeded 3000/month was June 2015, th years later in 2018, every month exceeded 3,000 attendances, and have done so almost every month since, apart from COVID lockdowns, and during fire restricted attendance months in 2023. First month > 4,000 attendances June 2021, and since August 2023, 2 years later, every month has exceeded 4,000 attendances. In May 2024, the first month,> 5,000 attendances occurred. IF predictive models hold in 22 months, every month will be > 5,000 attendances with implications for admissions, bed capacity, ambulance turnover, and more importantly, ED staffing.
World Health Organization data suggests the Western population is aging and living longer with multiple medical co-morbidities. Octogenarians and nonagenarians have been shown to have longer patient experience times (PET) and longer boarding times in Emergency Departments (ED) than younger patients.
Methods:
Automatic system-generated monthly and annual reports were examined from 2014 to 2024 to determine the frequency of attendance of patients in age groups greater than 80 years on a year-by-year basis. Data was examined using Microsoft Excel to determine trends.
Results:
ED attendances overall grew from 29,239 in 2014 to 49,560 in 2024 year to date. This represents a 41% rise in overall attendance. 2014 Raw data reveals a total of 2,194 attendances in the over 80 years of age cohort, or 7.50% of overall attendances. This increased to a full year maximum of 4,705 attendances in 2022, comprising 9.78% of all attendances. Year to date, 2024 looks to exceed that figure with 4,610 attendances to November 5th, comprising 9.30% of all attendances. Growth in attendance by over-80-year-old attendees was 52.41%. Over 90- year-old presentations increased from 365 (1.25%) in 2014 to 895 (1.81%) year to date 2024.
Conclusion:
ED attendances in general rose over the 11 years examined (41.00%); however, the rise in over-80s attendances greatly exceeded this (52.41%). This cohort of patients is more likely to require additional services such as frailty team, occupational therapy, semi-urgent primary care follow up and transport away from the ED when discharged. A larger proportion of this cohort will also require admission, indicating a growing trend in admissions, also of a cohort likely to have a longer length of stay, with implications for acute bed capacity at a time when capacity overall is constrained.
Medicine is undoubtedly advancing worldwide. New life-saving and life-prolonging interventions improve life expectancy, and population aging continues. World Health Organisation (WHO) data suggests 1 in 6 people will be aged 60 years or older by 2030. A predicted cohort population increase from 12% in 2015 to 22% by 2050. It’s unreasonable to assume everyone in this group has the same physical and mental capacity. Scientifically prolonged life increases the potential for health decline. An aging population requires greater resources overall. Ireland’s centenarian population increased from 386 in 2016 to 738 in 2023. We aimed to determine trends for presentations aged above 65 to an Irish rural emergency department over 11 years by examining absolute numbers and percentage of overall presentations.
Methods:
A retrospective analysis of automated monthly and annual reports from the electronic system initiation in 2014 to September 2024. Data analyzed in Excel.
Results:
Total presentations aged >65 increased annually from 6067 in 2014 to 11849 in 2024. This group was 20.75 % of total attendances in 2014 (lowest), 26.29% in 2020 (highest) (COVID YEAR), and 23.91% in 2024. Although several presentations in 2024 thus far exceed numbers seen at the same time in previous years, the total number of attendees has also risen.
A noted annual increase is present in each decade group above age 65. Nonagenarian presentations were 359 in 2014 (lowest) and 870 in 2024 (highest). Centenarian presentations were 1 in 2015 (lowest) and 25 in 2024 (highest).
Conclusion:
The results show presentations aged 65 and older are increasing annually. It is notable that the percentage of total attendances associated with this group is rising, specifically nonagenarians and centenarians. At this trajectory in population demographics, significant planning and resource management will be required to safely and appropriately manage these patients.
This chapter examines the forms of naval warfare and the roles for naval forces today and into the future. It identifies that navies are likely to continue to be called on to operate within a complex and often contested security environment and that navies and other maritime agencies will fulfil military, diplomatic and constabulary roles, sometimes in cooperation with others and sometimes in competition. The chapter explores the impact of new technology and new techniques in the light of recent conflict and examines the impact of growing Sino–US naval rivalry. The chapter concludes by arguing that naval policy is best understood within a wider maritime context that reflects national priorities, meaning that there is no fixed template that dictates the naval policy of a particular state.
This chapter explores and explains the evolution of naval warfare from the age of sail through to the present day. It examines how tactics and technology have changed over time and discusses the impact this has had on wider maritime strategy. The chapter argues that, despite the very many changes that have occurred in the conduct of naval warfare, key continuities remain and these can best be understood with reference to the ideas and concepts introduced in Chapter 7. A variety of conflicts and engagements are discussed to illustrate the key developments from the Battle of Trafalgar through to the nuclear age.
This chapter surveys almost 170 years of historical practice of and writings on irregular warfare to stress several points. It provides an empirical basis for assessing current and future irregular warfare based on codified doctrine, including best practices and observations. From the American Revolutionary War to the Second World War, several key themes emerge, including the necessity of force, the counterproductive nature of brute force and the value of objective as opposed to subjective assessments of contextual conditions. In doing so, this chapter seeks to deflate some of the influence of ‘presentism’, a bias that suggests recent experiences are unique and indicative of the future of irregular warfare. In stressing historical continuity, it acknowledges continuous elements in irregular warfare while recognising context differences.
Despite debates on the revolutionary impact of such concepts as blitzkrieg, modern land warfare has had a strong evolutionary dynamic. This chapter argues that modern tactics emerged during the First World War as a result of the need to cope with significant increases in firepower. Further, building on theories developed during the inter-war period, the concept of operational art emerged in practice during the Second World War as a means of connecting tactics to strategy. Modern system tactics and operational art remain at the heart of modern land warfare, although the latter, especially in terms of the idea of a distinct operational level of warfare, remains controversial.
This chapter examines the employment of air and space power in the twenty-first century, considering possible future developments in air and space power out until the year 2040. It notes the growing role of commercialisation in the delivery of air and space power and how businesses such as SpaceX have become a part of military operations through contractorisation. The chapter notes how Western air power advantages have been eroded by developments in Chinese aerospace and the proliferation of increasingly sophisticated missile systems. The rise of drone warfare is covered, along with the procurement of a range of drone and missile systems by non-state actors such as Hamas and Hezbollah; the chapter concludes with considerations of the ways in which this presents challenges going forward and a repudiation of the suggestion, presented by commentators such as Van Creveld, that the ’age of air power’ had drawn to a close.
This chapter develops the argument that land, in the form of the ground that warfare is fought on, gives land warfare certain unique characteristics, including its political significance, variability and resistant nature as a medium. These characteristics in turn shape the nature of the forces that fight upon land, making them complex, human-centric and persistent, and giving them the potential for the power of decision. Land warfare is complex: its prosecution requires navigating a wide array of competing trade-offs including those between manoeuvre and attrition, centralisation and decentralisation, and attack and defence. Land power, however, is composed of much more than land warfare, and joint and multi-domain capabilities make a vital contribution.
This chapter examines concepts and theories associated with naval warfare and maritime strategy. It begins with a discussion of the unique nature of the maritime operating environment before exploring the idea that navies have particular attributes or characteristics. It introduces the key principles of classic maritime strategy before exploring alternative approaches often employed by those facing an enemy stronger at sea. Concepts addressed include command of the sea, sea control and denial, fleet-in-being, blockade and guerre de course. These are explored with reference to relevant theories, to contemporary commentators and to current naval doctrine and maritime strategy.
This chapter explores the different forms strategy can take in practice. This involves, in the first instance, looking at offence, defence, deterrence, compellence, offence, and the miscellaneous uses of force. From this conceptual basis, the chapter ends with an examination of strategy in the contemporary setting. This includes a synopsis of the current state of the strategic landscape, identifying the most important trends and challenges extant in strategy. The four areas covered are the Ukraine War, technology (cyber power and unmanned systems/AI), nuclear weapons and strategic ethics.