bluuebunny/crossref_metadata_2025_split huggingface dataset:
Evaluation of water quality of Angereb reservoir: a chemometrics approach
Authors: Gobeze Ageritu , Kaba Tassisa , Tefera Molla , Lijalem Tsegu , Legesse Mulugeta , Engdaw Flipos , Mulu Mengistu , Wubet Walelign , Adugna Ayal , Guadie Atnafu 
Published: March 2023

AbstractDeterioration of water quality of lakes and reservoirs has become major global concerns that impose serious environmental impacts for both aquatic and terrestrial environments. In the current study, many parameters like temperature (Temp), electric conductivity (EC), dissolved oxygen (DO), turbidity (TU), pH, biological oxygen demand (BOD), chemical oxygen demand (COD), total alkalinity (TA), total dissolved solids (TDS), total organic carbon (TOC), nitrate(NO3−), phosphate (PO43−) and chlorophyll a (chl-a) were determined. The study covered the Angereb reservoir and its tributaries on a monthly basis from January to March 2019 at five sampling stations in accordance with APHA 2017 guide lines for physicochemical analysis. The values of all the investigated parameters, except DO (at AU, AD, KU and KD), COD and TU, were below the maximum permissible limits set by WHO. Thus, the findings for DO, TU and COD demonstrated that remedial actions should be taken to improve the quality of the water in the reservoir and its tributaries. Multivariate statistical methods (PCA and CA) were applied to detect spatial and temporal variations of water quality parameter. The first three principal components were enough to develop the PCA score plot which explained about 71.32% of the total variance in the dataset. The PCA and CA have provided similar information; grouped the 24 samples into 3 significant clusters showing spatial variations but minimal temporal variations were observed within the samples collected in the period of January in the reservoir site. The water quality parameters, TU and BOD, were moderately positively loaded on the space of the first principal component and were found to be associated with each other, whereas the EC and TDS have shown moderate negative loading and positively associated with each other. This study suggested PCA and CA methods found to be useful tools for monitoring and controlling water quality parameters for selected sampling stations of surface water.
Stratification of stakeholders for participation in the governance of coastal social-ecological systems
Authors: Celliers Louis , Rölfer Lena , Rivers Nina , Rosendo Sérgio , Fernandes Meredith , Snow Bernadette , Costa María Mãnez 
Published: March 2023

AbstractKnowledge co-production has become part of an evolution of participatory and transdisciplinary research approaches that are increasingly important for achieving sustainability. To effectively involve the most appropriate stakeholders there is a need for engagement and increasing prominence of stakeholders in environmental management and governance processes. The paper aims at developing and testing a methodology for stratifying stakeholders by (i) classifying organisations involved in coastal and ocean governance by their agency, and (ii) grouping them into organisational archetypes for representation and selection in research processes. Agency was measured by the three dimensions of scale, resources, and power. Each dimension was further elaborated as a set of indicators. The methodology is applied in the context of a research project set in Algoa Bay, South Africa. The stratification of organisations enabled the research team to gain a better understanding of the stakeholder landscape of organisational agency, and thus identify the most relevant stakeholder with which to engage. The use of a hierarchical cluster analysis identified five organisational archetypes in relation to ocean and coastal governance in Algoa Bay. The methodology used in this study proposes an informed and intentional approach to create the conditions under which the co-production of and participation in research processes can take place.
The Godless Crusade
Authors: Cremer Tobias 
Published: March 2023

This book postulates that the rise of right-wing populism in the West and its references to religion are less driven by a resurgence of religious fervour, than by the emergence of a new secular identity politics. Based on exclusive interviews with 116 populist leaders, key policy makers and faith leaders in the USA, Germany, and France, it shows how right-wing populists use Christianity as a cultural identity marker of the 'pure people' against external 'others' while often remaining disconnected from Christian values, beliefs, and institutions. However, right-wing populists' willingness and ability to employ religion in this way critically depends on the actions of mainstream party politicians and faith leaders. They can either legitimise right-wing populists' identitarian use of religion or challenge it, thereby cultivating 'religious immunity' against populist appeals. As the populist wave breaks across the West, a new debate about the role of religion in society has begun.
Snow spikes (penitentes) in the dry Andes, but not on Europa: a defense of Lliboutry's classic paper
Authors: Warren Stephen G. 
Published: March 2023

AbstractTall, spiky snow structures (penitentes) occur high in subtropical mountains, in the form of blades oriented east-west and tilted toward the noontime sun. By trapping sunlight, they cause a reduction of albedo by ~0.3 relative to flat snow. The formation of penitentes, explained by Lliboutry in 1954, requires weather conditions allowing the troughs to deepen rapidly by melting while the peaks remain dry and cold by sublimation, losing little mass, because of the 8.5-fold difference in latent heats. Lliboutry's explanation has been misrepresented in some recent publications. A concern has been raised that in the low latitudes of Jupiter's moon Europa, the ice surface may have developed penitentes, which would pose a hazard to a lander. They would require a different mechanism of formation, because Europa is too cold for melting to occur. If penitentes are present on Europa, they cannot be resolved by the coarse-resolution satellite images available now, but the high albedo of Europa (~0.7 at visible wavelengths) argues against the existence of such extreme roughness.
Clinician experiences with using assistive technology in brain injury rehabilitation: a survey of clinician capability, attitudes, and barriers
Authors: Pilli Kavya , Worne Brendan , Simpson Grahame 
Published: March 2023

AbstractBackground:The rise in assistive technology (AT) solutions to support people with an acquired brain injury (ABI) has warranted clinicians to build capability in assisting clients to select goal-centred AT. The study explored, amongst ABI clinicians, (a) capability, attitudes, and barriers with AT implementation, (b) age-related differences in technology self-efficacy and capability (c) strategies to support AT use in rehabilitation and (d) thematic analysis of AT-related experiences.Method:Mixed methods design. Online survey circulated to ABI clinicians across New South Wales, Australia, comprising purpose-designed items as well as the Modified Computer Self-Efficacy Scale (MCSES; range 0–100)Results:Clinicians (n = 123) were evenly distributed across decadal age groups. The majority were female (90%, n = 111) and one-third were occupational therapists.Clinicians scored strongly on the MCSES (Mdn = 76, IQR = 19), with younger age groups significantly associated with higher scores (H[3] = 9.667, p = .022). Most clinicians (92%) were knowledgeable of mainstream technology for personal use, but over half (65%) reported insufficient knowledge of suitable AT for clients. Clinicians reported positive attitudes towards AT, however, time to research and develop proficiency with a range of AT was the primary barrier (81%).Thematic analysis suggested that whilst the ideal AT experience is client-motivated requiring multidisciplinary guidance, the clinician role and experience with AT is evolving, influenced by rapid technological advancement and extrinsic opportunities to access AT.Conclusions:Whilst clinicians have positive attitudes towards AT, there is a gap in clinician implementation. There is need to support further resources to build clinician capability and access to AT.
Clinician perspectives of ABI vocational rehabilitation in Queensland
Authors: Watter Kerrin , Murray Alena , McLennan Vanette , Vogler Jessica , Ehlers Shelley , Jeffery Sarah , Nielsen Mandy , Kennedy Areti 
Published: March 2023

AbstractIntroduction:Services to support adults with acquired brain injury (ABI) and return to work goals are varied. In Queensland, Australia, return to work goals may be addressed through private or publicly funded rehabilitation services or through publicly funded employment programs. No set frameworks or processes are in place to guide clinicians in providing vocational rehabilitation to adults with ABI, and the extent to which services address clients’ vocational goals and/or provide vocational rehabilitation is unknown.Method:This qualitative study investigated the clinical practice and experiences of allied health rehabilitation clinicians (n = 34) to identify current practice in providing vocational rehabilitation to adults with ABI, including pathways and services; models, frameworks and tools; and recommendations for ideal services. Focus groups and online surveys were conducted, with data analysed via content analysis.Results:ABI vocational rehabilitation was inconsistently delivered within and across services in Queensland, with differences in access to services, aspects of vocational rehabilitation provided and timeframes for rehabilitation. Five key themes were identified regarding ABI vocational rehabilitation and service delivery in Queensland: Factors influencing ABI and return to work; Service provision; ABI vocational rehabilitation processes (including assessment tools and interventions); Service gaps; and Ideal ABI vocational rehabilitation services.Discussion:These findings can inform clinical practice and development, and current and future service delivery models for ABI vocational rehabilitation.
Exeporfinium chloride (XF-73) nasal gel dosed over 24 hours prior to surgery significantly reduced Staphylococcus aureus nasal carriage in cardiac surgery patients: Safety and efficacy results from a randomized placebo-controlled phase 2 study
Authors: Mangino Julie E. , Firstenberg Michael S. , Milewski Rita K.C. , Rhys-Williams William , Lees James P. , Dane Aaron , Love William G. , Gonzalez Moreno Jesus 
Published: March 2023

AbstractWe studied 83 cardiac-surgery patients with nasal S. aureus carriage who received 4 intranasal administrations of XF-73 nasal gel or placebo <24 hours before surgery. One hour before surgery, patients exhibited a S. aureus nasal carriage reduction of 2.5 log10 with XF-73 compared to 0.4 log10 CFU/mL for those who received placebo (95% CI, −2.7 to −1.5; P < .0001).
Hydrodynamics of finite-length pipes at intermediate Reynolds numbers
Authors: Pomerenk Olivia , Carrillo Segura Simon , Cao Fangning , Wu Jiajie , Ristroph Leif 
Published: March 2023

Extensive studies of the hydraulics of pipes have focused on limiting cases, such as fully-developed laminar or turbulent flow through long conduits and the accelerating flow through an orifice, for which there exist laws relating pressure drop and flow rate. We carry out experiments on smooth, circular pipes for dimensions and flow rates that interrogate intermediate conditions between the well-studied limits. Organizing this information in terms of dimensionless friction factor, Reynolds number and pipe aspect ratio yields a surface$f_D(Re,\alpha )$that is shown to match the three laws associated with developed laminar, developed turbulent, and orifice flows. While each law fails outside its applicable range of$(Re,\alpha )$, we present a hybrid theoretical–empirical model that includes inlet, development and transition effects, and that proves accurate to approximately 10 % over wide ranges of$Re$and$\alpha$. We also present simple formulas for the boundaries between the three hydraulic regimes, which intersect at a triple point. Measurements show that sipping through a straw is an everyday example of such intermediate conditions not accounted for by existing laws but described accurately by our model. More generally, our findings provide formulas for predicting frictional resistance for intermediate-$Re$flows through finite-length pipes.
Engines for agricultural aircraft
Authors: Harker R. W. 
Published: March 2023

This paper has been written at rather short notice, which has prevented me from going into statistics and detailed figures, as I would have wished. It is therefore given fairly broad brush treatment and concentrates mainly on the larger types of crop-spraying aircraft in the category of around 6/7000 lb all up weight. This is where the engine situation is most critical and the need for a satisfactory powerplant which the operator can afford is most needed.My only claim to be able to offer ideas or suggestions and perhaps some prognostications for the future is by associating with a number of Ag operators over the last four years, mainly in the States and particularly at the last four National Agricultural Aircraft Conventions in Florida and at Las Vegas; I have therefore no intention of being pontifical. Another reason for caution is because most of my past experience with engine installations has been with sophisticated aircraft, such as jet fighters, where I have had the good fortune to be supported by a team of technical experts and colleagues.
Legal aspects of mandatory occurrence reporting and CAA powers and duties in the context of pilot licensing
Authors: White G. M. E. 
Published: March 2023

Section 8(2)(h) of the Civil Aviation Act 1949 gives power to make provision in the Air Navigation Order ‘generally for securing the safety, efficiency and regularity of air navigation and the safety of aircraft and of persons or property carried therein’. When it was decided to institute a Mandatory Occurrence Reporting system, there was therefore no problem about including a requirement for reporting in the Air Navigation Order, since the whole purpose of the system is to secure the safety of air navigation.Provision for Mandatory Occurrence Reporting was first made in the summer of 1974 by the Air Navigation (Amendment) Order 1974 which added to the Order a new article, Article 80(A), which specified classes of persons required to report to the Civil Aviation Authority ‘any reportable occurrence … which is of such a description as may be prescribed’. ‘Prescribed’ in the Air Navigation Order means prescribed in regulations (in this context the Air Navigation (General) Regulations) and Article 80(A) did not in fact bite until regulations had been made.
Air transport demand 2000—through a glass darkly
Authors: Wheatcroft Stephen F. 
Published: March 2023

One of my US friends in the forecasting fraternity wrote a paper some years ago which he called ‘The Perils of Prediction'. He concluded, on the evidence of successes and failures, that all air traffic forecasters needed to have their heads examined for staying in the business. So why am I here today to talk about air transport demand in the next quarter of a century? Only because I am totally persuaded that the industry cannot do without forecasts —and, moreover, very long term forecasts—of the future volume and nature of demand. I shall examine this proposition in detail shortly. But, in spite of this conviction, you will note that I have added the words ‘through a glass darkly’ to my title. Those of you familiar with St. Paul's Epistle to the Corinthians will remember the words:'When I was a child, I spoke as a child, I understood as a child, I thought as a child, but when I became a man I put away childish things for now we see through a glass darkly, but then face to face'.
The air defence of the West—a view from NATO's Central Region
Authors: Ellis Richard H. 
Published: March 2023

Considerable public debate has arisen recently over the Warsaw Pact's increasing military capability both in quantity and quality of land, sea and air weapons systems. The Soviet military potential has moved from mainly defensive to increased offensive power and a considerable proportion of Soviet resources is going into military research and development. These developments and trends are of increasing concern to the Western democracies particularly in the light of Soviet communism's constant aims and ambitions.Professional military correspondents and commentators have been warning us on these trends in Soviet military power for a decade or more but a more public and general concern has arisen only in the last year or two, inspired in part perhaps by the lack of progress in SALT and MBFR negotiations as well as the disappointments arising out of the Helsinki agreements.
Aero engine development costing
Authors: Fitzgerald R. M. 
Published: March 2023

Rolls-Royce develops engines for both commercial and military purposes. The majority of the military business is through the Procurement Executive branch of the Ministry of Defence. It is not the purpose of this paper to describe the cost estimating and control of contracts with HMG, but to discuss our procedures for commercial engines.Expressing a programme in figures of £'s sterling is a convenient way of aggregating many dis-similar resources.
Thick, two-dimensional wake roll-up behind a wing of finite span—extended calculations
Authors: Portnoy H. 
Published: March 2023

Reference 1 describes a numerical procedure for calculating the roll-up of the wake behind a wing of finite span, when the wake vorticity is assumed to occur within a layer of finite thickness with thin elliptic cross-section normal to the stream. The vorticity is assumed to be a function of spanwise position only (corresponding to a linear transverse velocity profile when the wake is thin), the process is treated as a two-dimensional unsteady one, as in the work of Westwater, Moore and others, and viscous and turbulence effects are ignored.In Ref. 1 the technique was applied to the classical elliptic loading, to calculate the very early stages of the roll-up. In the present paper these calculations are extended to larger values of the dimensionless time t* and the results are seen to tally fairly well with those of Moore, which were obtained by using a point-vortex model. Similar calculations have also been carried out for a particular non-elliptic loading which was dealt with by Clements and Maull by a two-dimensional, point-vortex method. They gave this loading as an example of a distribution which produces two roll-up cores on each half span, with an induced drag only 10% greater than that of the elliptic loading having the same Ch. The results of the new calculations are presented here, and are seen to be similar to those of Ref. 4 in a general way, both qualitatively and quantitatively.
The Government's White Paper on Future Airport Policy
Authors: Clinton Davis S. 
Published: March 2023

Since the White Paper appeared three weeks ago, there has been both the opportunity for an initial reaction to emerge and sufficient time for a more mature consideration of the policy conclusions and their implications. The symposium today provides the first occasion open to the Government to explain the policy to a wider audience—outside the House of Commons and the meetings which I have been holding up and down the country at particular airports—to comment on the principal views which have been expressed so far; and to receive a reaction to the White Paper and its recommendations from influential opinion within the airlines, airport authorities, local authorities, amenity organisations and airport users.It is not my intention to comment on the detailed conclusions of the White Paper, which Neville Ledsome will be covering shortly. But I would like to refer briefly to the Government's overall approach; to the immediate reaction to the White Paper; and to the next steps in the development of airports policy, for which the White Paper marks a beginning rather than an end.
Ground access for airports
Authors: Quarmby David 
Published: March 2023

First some independent comments about the access issues raised in the consultation document originally and in the White Paper most recently, and I can do so with a fair degree of independence because now having got the Heathrow Underground link all we have to do is to run it properly and some of the current problems will look after themselvesPerhaps I can give a somewhat independent view on the access issues for airports generally. Just for the record we are interested in access not only for air passengers but also for airport workers who are almost as numerous in their movements as the air passengers are, and those doing business at the airports, particularly those involved in the movement of commercial vehicles. Access is important because, first of all, it can consume a good deal of time and effort on the part of a passenger as part of his total journey.
Air-to-air combat simulation
Authors: Barnes A. G. , Houghton E. A. 
Published: March 2023

The Flight Simulation Facility at the Warton Division of British Aerospace provides support for the design and development of advanced military aircraft. In fulfilling this rôle, opportunities often arise for innovation in the required flight simulation equipment. The combat simulator which we will describe is a good example of such an opportunity.The practice of using flight simulators for research and development is well established, and the range of problems which are solved by this means is continually growing. Computers, which are at the heart of all simulators, are being improved at a remarkable rate, and improvements in other areas—electronic, hydraulic and mechanical, all contribute to more effective simulators. At the same time, the demand for simulation increases because the cost saving trade-off improves as the cost of flight testing to the ever-more-stringent design goals increases.
Pitot-tubes at 90 and 180 degrees of yaw
Authors: Mojola O. O. 
Published: March 2023

As a total pressure sensor in laminar or turbulent flows, the conventional, circular, pitot-tube, with a sharp plane mouth and diameter ratio of about 0.6, has long been known to be insensitive to yaw within about ±10°, relative to the incident stream direction, and, apart from a few isolated attempts to design special pitot-probes having a flat yaw response of over ±45° or thereabouts, information on pitot-tube response at very large yaw angles (>45°, say) is virtually non-existent, even though such information might be sometimes useful.In this brief note is presented some exploratory measurements of pitot-tube response in a uniform stream at two particular yaw angles, namely 90° and 180°. While the 90° angle was chosen largely out of pure curiosity, the choice of 180° yaw has been motivated by some questions raised in a study on pressure-probe interference in a vortex flow. Included is a brief discussion of the effects of shear on the pitot-tube response.
De Havilland engines—some recollections
Authors: Moult E. S. 
Published: March 2023

Before we begin, let me say that this paper is not a catalogue of engines, their bores and strokes, their output and weight. These aspects have been well covered before and are well recorded.However, engines will figure prominently because that was the business of de Havilland Engines and our fortunes or misfortunes followed their pattern. However, instead of rigorously following the historic trail I prefer to pick out some of the landmarks and to outline some of the problems we met on the way. There may be a few anecdotes and something about the people who took part.To begin at the beginning, we must start with Geoffrey de Havilland, who wanted to fly.