bluuebunny/crossref_metadata_2025_split huggingface dataset:
Knowledge mapping analysis of the track and hotspot of water lubrication: A scientometrics review
Authors: Xu Runzhou , Wu Defa , Wang Zhenyao , Deng Yipan , Cheng Qian , Pang Hao , Wei Wenshu , Liu Yinshui 
Published: March 2023

AbstractWith the enhancement of environmental protection awareness of the international community and the continuous promotion of green and sustainable development of manufacturing industry, water lubrication instead of mineral oil has become the future development trend due to its green, pollution-free, clean, safe, and sustainable advantages especially in ships, marine, coal mining, and other fields. In recent years, with the rapid development of water lubrication research, significant progress has been made in related research knowledge domain and discipline. A systematic and extensive assessment of water lubrication research has become increasingly important. The objective of this research is to reveal the research status, research hotspots, and development trends in the field of water lubrication. Therefore, CiteSpace was used to conduct a systematic bibliometric and scientometrical analysis of 1,792 publications from Web of Science core collection database (1997–2021). The results show that China and USA are the most productive countries in the field of water lubrication and have made outstanding contributions. Through the analysis of hot key words and co-citation references, this paper reviews the research status of water lubrication in three aspects: (1) lubricating medium modification; (2) material preparation; (3) surface optimization. It has become a research hotspot to promote the superlubricity contact interface and the application of nanotechnology. The results of this study can make a significant contribution to the development of water lubrication by providing a comprehensive understanding of the research status and research hotspots in this field. Personal understanding and discussion of research hotspots and research status are expected to provide insights into future research trends. In addition, this study will provide valuable references and guidelines for researchers who are interested in this field.
Current-carrying friction in carbon coated ball bearing
Authors: Xue Peidong , Chen Cheng , Fan Xue , Diao Dongfeng 
Published: March 2023

AbstractIn this work, we proposed a method for coating the whole surfaces of bearing balls uniformly by carbon film with a rotatable ball clamp. We studied the carbon/carbon friction with a self-designed current-carrying ball bearing friction test system. A notable and instant friction force drop of 28% and significant carbon film wear alleviation were found when currents were applied. By using TEM-, SEM-, and EDS-analysis, special carbon stacks with a mixture of large wear particles and oxide were found in the wear areas under current applied condition. We elucidated the current-carrying friction mechanisms as follows: (1) wear particles formation; (2) wear particles charged by tribomicroplasma; (3) formation of surface passivated carbon stacks under electric force; (4) sliding between passivated carbon surfaces. This work may facilitate the development of novel solid-lubricated ball bearings and lay some foundations for current-carrying rolling friction.
Transient temperature characteristics of friction clutch disc considering thermal contact conductance under sliding conditions
Authors: Liu Yuwei , Sun Yuanzhi , Gao Ziyin , Ye Fuhao , Tang Pei 
Published: March 2023

AbstractHigh temperatures are generated due to the sliding contacts between the rubbing surfaces of the friction clutch system. In this work, by considering the effective thermal contact conductance under sliding conditions, a simulation model of a two-dimensional transient temperature field of the clutch disc was developed. A numerical solution to obtain the surface temperature at different radii was presented based on the finite difference method. Compared with the experimental data, the proposed model for estimating the surface temperature is more accurate than the conventional prediction method. The results showed that the errors of the calculated temperatures at radii of 114 and 106 mm have obviously reduced by 12.98% and 12.60%, respectively. In addition, the influences of pressure and relative speed on the surface temperature were investigated. The temperature increases with the increase of the relative speed and pressure during the sliding period, and there is an interaction effect between pressure and speed on the surface temperature rise.
Deformation- and rupture-controlled friction between PDMS and a nanometer-scale SiOx single-asperity
Authors: Caron Arnaud 
Published: March 2023

AbstractThis work investigates the friction between polydimethylsiloxane (PDMS) and silicon oxide (SiOx) in single asperity sliding contact by atomic force microscopy (AFM). Two friction dependences on the normal force are identified: a tensile regime and a compressive regime of normal forces. In the compressive regime, friction is governed by the shear deformation and rupture of junctions between PDMS and SiOx. In this case, the shear strength τ ≈ 10 MPa is comparable with the cohesive strength of PDMS under compressive loading. In contrast, friction in the tensile regime is also affected by the elongation of the junctions. The single SiOx-asperity follows a stick-slip motion on PDMS in both normal force regimes. Statistical analysis of stick-slip as a function of the normal force allows determining the necessary amount of energy to break a SiOx/PDMS junction. Friction between a SiOx-asperity and a PDMS surface can be rationalized based on an energy criterion for the deformation and slippage of nanometer-scale junctions.
Cognitive and Psychological Impacts of Congenital Corpus Callosum Disorders in Adults: A Scoping Review
Authors: Maxfield Maree , McVilly Keith , Devine Alexandra , Jordan Helen 
Published: March 2023

Abstract
Objectives
Support for adults with congenital corpus callosum disorders (CCDs) is impeded by poor understanding of the impacts of a CCD on day-to-day functioning and quality of life. This scoping review examines existing literature to establish the evidence-based impacts of congenital CCDs in adults and identify gaps to inform future research, policy development, and service delivery.

Methods
We conducted searches in Scopus, Medline Ovid, PsycInfo, Discovery, and ERIC. Studies meeting selection criteria were peer-reviewed, in English, published from 1980 to 2021, reported predominantly on participants 16 years or older who were diagnosed with a CCD by magnetic resonance imaging (MRI).

Results
The thirty-eight included articles comprised 14 single/dual participant case studies and 24 group studies, comparing adults with a CCD with normative data or matched controls. Although most participants were of average IQ, CCDs affected day-to-day executive functioning, social interaction, and meeting expectations of adulthood. Cognitive impacts included difficulties with learning and memory, linguistic and emotional processing, and complex reasoning, with functional capacity typically decreasing as tasks and situations increased in complexity. Psychological impacts pertaining to feelings, emotions, and social awareness were reported in addition to associated mental health, psychiatric mood, and developmental and psychotic disorders including autism, anxiety, depression, and schizophrenia.

Conclusions
Impacts were extremely heterogenous, presenting interwoven challenges to learning, executive functioning, social interaction, and mental health. Knowledge of these circumstances is vital for adults with CCDs, professionals, and family members to ensure appropriate services and support are available to promote good quality, inclusive lives for all adults with a CCD.
Albert algebras over and other rings
Authors: Garibaldi Skip , Petersson Holger P. , Racine Michel L. 
Published: March 2023

AbstractAlbert algebras, a specific kind of Jordan algebra, are naturally distinguished objects among commutative nonassociative algebras and also arise naturally in the context of simple affine group schemes of type$\mathsf {F}_4$,$\mathsf {E}_6$, or$\mathsf {E}_7$. We study these objects over an arbitrary base ringR, with particular attention to the case$R = \mathbb {Z}$. We prove in this generality results previously in the literature in the special case whereRis a field of characteristic different from 2 and 3.
Infection prevention and antibiotic stewardship program needs and practices in 2021: A survey of the Society for Healthcare Epidemiology of America Research Network
Authors: Coffey KC , Keller Sara C. , Anderson Deverick J. , Deloney Valerie M. , Harris Anthony D. , Henderson David , Milstone Aaron M. , Morgan Daniel J. , Rock Clare , Schweizer Marin , Chiotos Kathleen 
Published: March 2023

AbstractIn total, 50 healthcare facilities completed a survey in 2021 to characterize changes in infection prevention and control and antibiotic stewardship practices. Notable findings include sustained surveillance for multidrug-resistant organisms but decreased use of human resource-intensive interventions compared to previous surveys in 2013 and 2018 conducted prior to the COVID-19 pandemic.
Observing tidal effects on the dynamics of the Ekström Ice Shelf with focus on quarterdiurnal and terdiurnal periods
Authors: Fromm Tanja , Schlindwein Vera , Helm Veit , Fofonova Vera 
Published: March 2023

AbstractAntarctica's ice shelves stabilize the ice sheet and, therefore, understanding processes affecting the mass budgets of ice shelves is important for estimating grounded ice loss. To study the ice shelf dynamics, we analyzed seismological and GNSS data from the Ekström Ice Shelf in Dronning Maud Land. We extracted probabilistic power spectral densities (PPSD) in the frequency band 3.4–6.8 Hz, typical of icequakes, from seismological data and observed pronounced signals in the PPSD with near 3 and 4 cycles per day (cpd) corresponding to tidal overharmonics, in addition to the main tidal constituents near 1 and 2 cpd. GNSS data reveal the same components in ice flow speed but not in vertical displacements. Generally, tide-induced grounding line migration modulates the flow velocity of an entire ice shelf. We find that this velocity modulation causes the increased icequake activity in the tidal overharmonics with 3 and 4 cpd in an ice shear zone where the flow velocity drops to nearly zero.
Numerical solutions of the Euler equations governing axisymmetric and three-dimensional transonic flow
Authors: Causon D. M. , Ford P. J. 
Published: March 2023

SummaryA computational method is presented for solving numerically the three dimensional Euler equations for transonic flow around practical aircraft forebodies. The Euler solver is pseudo-time dependent, split and cast in finite volume form. Shock waves are captured crisply without the need for additional smoothing by means of an operator-switching facility which more accurately reflects the direction of propagation of signals.The method is illustrated by examples of computed external, axisymmetric flows and some, simulated, realistic aircraft fore-bodies. The computational meshes employed in the three dimensional cases are essentially of cylindrical polar, flow conforming, type and relatively coarse. Closer attention to the mesh generation is expected to refine the results presented here. The method is versatile, robust, and holds promise for treating complex three dimensional geometries within economically viable run times.
Effects of mixed elastic rotational edge restraints on the vibration, buckling and bending of circular plates
Authors: Gunaratnam David J. , Bhattacharya A. P. 
Published: March 2023

SummaryA general formulation based on a variational approach is used to study the static bending, vibration and stability of circular plates having mixed elastic rotational constraints at the boundary. A single displacement function suitable for these three classes of problems is used in a Ritz scheme to obtain static bending solutions and eigenvalues for various combinations of boundary parameters that exhibit symmetry about two axes. Results obtained are generally in good agreement with those available in the literature and in some cases represent an improvement on those previously reported. The lowest eigenvalues for the stability problem are presented for the first time.
Hardware integrity
Authors: Cullyer W. J. 
Published: March 2023

SummaryResearch at RSRE has revealed significant problems in the use of commercial microprocessors in safety critical equipment. The difficulties arise from the imprecise documentation of the instruction sets by the microprocessor manufacturers and changes in internal design and external functionality during the years a popular device is marketed. To meet certain defence needs, RSRE is conducting research on formal methods of design and implementation of VLSI chips which provide simple processing capability and can be proved to be functionally correct. The first product of this research is a new 32-bit microprocessor architecture, called VIPER, which is described in outline in this paper. Although the primary application of such high integrity devices is in the defence field it is believed that they would be of great value in civil aviation, both in fast control loops in aircraft and in the control of critical DVOR/ DME, ILS and MLS transmitters on the ground.
Frequency-domain application of Gauss-Newton method to extract aircraft longitudinal parameters
Authors: Raisinghani S. C. , Goelt A. K. 
Published: March 2023

SummaryA simplified output error method based on the Gauss-Newton minimisation technique is formulated in the frequency-domain and its application demonstrated for extraction of aircraft longitudinal parameters from simulated flight data. A study is carried out to show the effects on the accuracy of estimated parameters due to use of different input forms to generate the flight data, using different initial values to start the algorithm, presence of measurment noise in the flight data and fixing some weak parameters at a priori values. It is shown that the use of Packing Theorem to increase the sparsely sampled frequency data does not lead to better accuracy by the proposed method, as has been reported for the maximum likelihood method in the literature. Finally, relative advantages of the frequency-domain approach as against the time-domain approach are pointed out by analysing the same flight data in these two domains. It is shown that frequency-domain approach is better equipped to analyse noisy-data and can yield better estimates at reduced computational time.
The assessment of boundary layer two-dimensionality
Authors: Fraser C. J. 
Published: March 2023

SummaryThe results of an experimental evaluation of three assessment criteria for boundary layer two-dimensionality are presented. The criteria include the so-called ‘two pin test', the momentum balance principle and the cross-stream variation in local skin friction coefficient. Extensive spanwise measurements in the flows investigated highlight the relative merits and limitations of the criteria imposed.The momentum balance method is found to be the most informative technique, with the proviso that the test data must be interpreted with some care if measurements are restricted along a single streamwise axis.The two pin test is found to provide a worthwhile complimentary addition to momentum balance data, whereas the spanwise variation in local skin friction coefficient is less conclusive as regards flow two-dimensionality.Excepting the case of adverse pressure gradient flows, the momentum balance equation is seen as a viable experimental means of estimating the local skin friction coefficient in boundary layers where measurement is problematical, as in the case of transitional boundary layers. In such cases, the two pin test could be used as the sole means of confirming the flow two-dimensionality.
A conic-cubic method for curve fitting and function interpolation
Authors: Skrobański J. J. , Lovell D. A. 
Published: March 2023

SummaryThis paper describes a simple method for smooth curve fitting or function interpolation. Where possible, the method uses continuous piece-wise conies in preference to cubics so as to prevent the occurrence of extraneous inflection points. The method is ideal for single-valued functions with sharply changing gradients such as occur in pressure distributions, containing shock waves. A version that is valid for multivalued functions is also described.
The lateral dynamic stability and control of a large receiver aircraft during air-to-air refuelling
Authors: Bloy A. W. , Lamont P. J. , Abu-Assaf H. A. , Ali K. A. M. 
Published: March 2023

SummaryThe lateral dynamic stability and control of a large receiver aircraft was considered during air-to-air refuelling. A simple aerodynamic model was developed in order to determine the aerodynamic forces and moments acting on the receiver aircraft due to the tanker aircraft's vortex field. These forces and moments were then expressed in derivative form and included in the linearised equations of motion. Solution of these equations revealed a divergent oscillation, characteristic of air-to-air refuelling and consisting mainly of bank and sideways displacements. An approximation to this mode, which highlights two important aerodynamic derivatives was made. The values of these derivatives depend mainly on the vertical separation between the tanker and receiver aircraft and the ratio of the tanker-to-receiver aircraft wing spans. In flight, it appears that the pilot controls the divergent mode by frequent alternate movements of the ailerons.
Pressure fluctuations caused by transonic
shock/boundary-layer interaction
Authors: Mundell A. R. G. , Mabey D. G. 
Published: March 2023

SummaryAn analysis of an extensive series of unsteady and steady pressure measurements at transonic speeds on a rigid 12% thick NACA 16 series aerofoil reveals a useful classification of the type of excitation characteristics of particular flow regions.The pressure fluctuation measurements suggest that when the shock from the aerofoil reaches the tunnel roof, serious interference (both dynamic and static) occurs.The RAE 2 ft × 1½ ft Transonic Tunnel used for the tests has low levels of flow unsteadiness at low frequencies, making it a useful facility for basic research in time-dependent aerodynamics.
What are we in business for? (An engineering approach to project finance)
Authors: Young Pierre 
Published: March 2023

SummaryIt is shown, fairly rigorously, that large aerospace projects, with typical periods of 15 years to break even, are unlikely to provide a commercial rate of return on a ‘risk’ investment. However, they can generate enough surplus to meet an alternative criterion, the ‘self-financing ratio’, which emphasises the contribution made by the Project to the future self-financing capability of the company. Until this blessed state is achieved, the industry needs ‘cheap money’ whose main source can only be the taxpayer. The role of the taxpayer as investor is examined with the help of an elementary econometric model. A form of ‘Prospectus to the Taxpayer’ is developed which summarises the quantifiable benefits to the national economy arising from the launch of a project. The same methods are also applied to the formulation of a ‘Home-Purchase Discount’, intended as an aid to government procurement decisions. The concluding remarks emphasise that the paper is relevant primarily to the ‘large scale high R&D sector’ of industry, of which aerospace is a prominent component.Finally, the views expressed in this paper are my own and emphatically do not reflect those of the Company I have the honour to serve in other fields
Two-dimensional flow past bluff flexible membranes of low porosity
Authors: Low H. T. , Newman B. G. 
Published: March 2023

SummaryThis paper considers two-dimensional flow past flexible membranes whose supports are aligned at right angles to the flow. Unlike a previous study of bluff impervious membranes, the present membranes are slightly porous having a porosity similar to that of parachutes. The drag and base pressure have been measured for various lengths and for a variety of fabrics. The results have been correlated by two theories which are extensions of those already published. When the porosity is not too small the results are shown to depend only on the total volume flow through the membrane. The tendency for the membrane to oscillate in harmony with regular vortex shedding is reduced by the porosity and increased by the length of the membrane. Above a certain porosity oscillation is inhibited for all membrane lengths.
Some examples of the application of the Beecham-Titchener-Simpson (BTS) method to autonomous systems
Authors: Christopher P. A. T. , Thorne R. 
Published: March 2023

SummaryIt is noted that the averaging technique of Beecham and Titchener, for obtaining approximate solutions to nonlinear, ordinary, differential equations, is not widely known or used. In its extended form, as given by Simpson and Ross it appears to offer a unified and useful approach to the solution of many dynamical and other problems. The present paper sets out to describe and discuss, through the medium of a collection of examples, the Beecham-Titchener-Simpson (BTS) method in an effort to encourage its more widespread use.
BLOOD ON HIS WORDS, BARLEY ON HIS MIND. TRUE NAMES IN CAESAR'S SPEECH FOR THE LEGENDARY ‘BARLEY-MUNCHER’ (BGALL.7.77)
Authors: Krebs Christopher B. 
Published: March 2023

AbstractCritognatus’ speech has long been recognized as heavily by Caesar's hand, although few have questioned whether any speech was delivered by the Arvernian noble at all; and it has long puzzled readers with its contradictory manner and fierce criticism of Rome. But the etymologizing wordplay across several languages demonstrated below (along with other distinctly comical elements) renders it more than likely that both the speech and the speaker are products of the author's imagination. In its Nabokovian mode, it offers a glimpse of Caesar the linguist and introduces a playfulness into the dire situation before Alesia that suggests that the ‘Barley-Muncher’ and his speech should be reconsidered in a different, more humorous light.
Stochastic linearized generalized alternating direction method of multipliers: Expected convergence rates and large deviation properties
Authors: Hu Jia , Guo Tiande , Han Congying 
Published: March 2023

AbstractAlternating direction method of multipliers (ADMM) receives much attention in the field of optimization and computer science, etc. The generalized ADMM (G-ADMM) proposed by Eckstein and Bertsekas incorporates an acceleration factor and is more efficient than the original ADMM. However, G-ADMM is not applicable in some models where the objective function value (or its gradient) is computationally costly or even impossible to compute. In this paper, we consider the two-block separable convex optimization problem with linear constraints, where only noisy estimations of the gradient of the objective function are accessible. Under this setting, we propose a stochastic linearized generalized ADMM (called SLG-ADMM) where two subproblems are approximated by some linearization strategies. And in theory, we analyze the expected convergence rates and large deviation properties of SLG-ADMM. In particular, we show that the worst-case expected convergence rates of SLG-ADMM are
$\mathcal{O}\left( {{N}^{-1/2}}\right)$
and
$\mathcal{O}\left({\ln N} \cdot {N}^{-1}\right)$
for solving general convex and strongly convex problems, respectively, where N is the iteration number, similarly hereinafter, and with high probability, SLG-ADMM has
$\mathcal{O}\left ( \ln N \cdot N^{-1/2} \right ) $
and
$\mathcal{O}\left ( \left ( \ln N \right )^{2} \cdot N^{-1} \right ) $
constraint violation bounds and objective error bounds for general convex and strongly convex problems, respectively.