bluuebunny/crossref_metadata_2025_split huggingface dataset:
Automated Candidate Detection for Additive Manufacturing: A Framework Proposal
Authors: Page Thomas Daniel , Yang Sheng , Zhao Yaoyao Fiona 
Published: July 2019

AbstractAs additive manufacturing (AM) continues to grow in its abilities, so does the need for a quick and effective method of determining how it should be applied. Over time, these methods are naturally developed and passed on as tacit knowledge. However, with the rapid advancement of AM technologies, identifying parts which are eligible for AM as well as gaining insight on what value it may add to a product needs to be modelled in an objective and transferrable way. This paper presents a framework for determining the candidacy of a part or assembly for AM, represented by its economic feasibility and potential for AM-specific benefits. A set of selection criteria is developed with the goal of fast-screening in mind; that is specific data which can be automatically extracted from CAD models and resource planning databases. A case study is performed to validate the criteria and decision model chosen, as well as gain insight to the potential for a more widespread application. The decision model successfully identified economic feasibility and AM potentials, which suggests the results of the case study show promise for a semi-automatic decision support system for identifying AM candidates.
Conception of Design Principles for Additive Manufacturing
Authors: Valjak Filip , Bojčetić Nenad 
Published: July 2019

AbstractAdditive Manufacturing (AM) brought new design freedom and possibilities that enable design and manufacturing of products with new forms and functionalities. To utilise these possibilities a new design approach emerged, Design for Additive Manufacturing (DfAM), that contains methods and tools for supporting AM oriented design process. Designers working with AM are aware of the need to apply DfAM and AM possibilities in conceptual design phase where they have the most significant influence on product architecture and form but are facing a lack of suitable DfAM approaches for early design phases. Therefore, the presented research is investigating possibilities of storing and representing AM knowledge in the form of design principles to be used in the conceptual design phase. The paper proposes conceiving of Design Principles for Additive Manufacturing repository where formalised AM knowledge is stored in the form of design principles and structured based on function criteria. In the paper, various elements of design principle representation are discussed, as well as their role in the conceptual design process.
Design of a Custom-Made Cranial Implant in Patients Suffering from Apert Syndrome
Authors: Mandolini Marco , Brunzini Agnese , Brandoni Serrani Eleonora , Pagnoni Mario , Mazzoli Alida , Germani Michele 
Published: July 2019

AbstractThis study defines a methodological procedure for the design and manufacturing of a prosthetic implant for the reconstruction of a midsagittal bony-deficiency of the skull due to the Apert congenital disorder. Conventional techniques for craniofacial defects reconstruction rely on the mirrored-image technique. When the cranial lesion extends over the midline or in case of bilateral defects, other approaches based on thin plate spline interpolation or constrained anatomical deformation are applied.The proposed method uses the anthropometric theory of cranial landmarks identification for the retrieval of a template healthy skull, useful as a guide in the successive implant design. Then, anatomical deformation of the region of interest and free-form modelling allow to get the customized shape of the implant. A full bulk and a porous implant have been provided according to the surgeon advises.The models have been 3D printed for a pre-surgical analysis and further treatment plan. They fulfilled the expectancies of the surgeon thus positive results are predictable.This methodology results to be reproducible to any other craniofacial defect spanning over the entire skull.
Design of Shoe Soles Using Lattice Structures Fabricated by Additive Manufacturing
Authors: Dong Guoying , Tessier Daniel , Zhao Yaoyao Fiona 
Published: July 2019

AbstractAdditive manufacturing (AM) has enabled great application potential in several major industries. The footwear industry can customize shoe soles fabricated by AM. In this paper, lattice structures are discussed. They are used to design functional shoe soles that can have controllable stiffness. Different topologies such as Diamond, Grid, X shape, and Vintiles are used to generate conformal lattice structures that can fit the curved surface of the shoe sole. Finite element analysis is conducted to investigate stress distribution in different designs. The fused deposition modeling process is used to fabricate the designed shoe soles. Finally, compression tests compare the stiffness of shoe soles with different lattice topologies. It is found that the plantar stress is highly influenced by the lattice topology. From preliminary calculations, it has been found that the shoe sole designed with the Diamond topology can reduce the maximum stress on the foot. The Vintiles lattice structure and the X shape lattice structure are stiffer than the Diamond lattice. The Grid lattice structure buckles in the experiment and is not suitable for the design.
Methods and Principles of Product Design for Small-Scale Production Based on 3D Printing
Authors: Salobir Jure , Duhovnik Jože , Tavčar Jože 
Published: July 2019

AbstractTechnology of 3D printing is opening the possibility for small-scale production in quantities between ten and several hundred pieces. The technology of adding material enables the production of complex and integrated functional concepts in a single-pass process, which consequently potentially reduces the need for assembly operations. Design approaches and manufacturing processing are not mastered well because of a constant stream of new materials and manufacturing options. Well-designed products need to consider attributes of 3D printing as early as the conceptual phase. The cost of the product can be reduced with a systematic research and considering principles for small-scale production. In a cheaper, alternative production process the quality range of products is often lower. It has to be compensated with appropriate construction solutions which are less tolerance-sensitive. Therefore, in order to support the designer, to reduce the costs and design time of the product, a computer program was created to provide the user with an insight into the appropriate 3D printing technology. For simplifying the use, the program is also integrated into the product development process.
Model for Evaluating Additive Manufacturing Feasibility in End-Use Production
Authors: Ahtiluoto Matti , Ellman Asko Uolevi , Coatanea Eric 
Published: July 2019

AbstractIn practical design work, a designer needs to consider the feasibility of a part for a manufacturing using additive manufacturing (AM) instead of conventional manufacturing (CM) technology. Traditionally and by default parts are assumed to be manufactured using CM and using AM as an alternative need to be justified. AM is currently often a more expensive manufacturing method than CM, but its employment can be justified due to number of reasons: improved part features, faster manufacturing time and lower cost. Improved part features means usually reduced mass or complex shape. However, in low volume production lower manufacturing time and lower part cost may rise to the most important characteristics.In this paper, we present a practical feasibility model, which analyses the added value of using AM for manufacturing. The approach is demonstrated in the paper on four specific parts. They represent real industrial design tasks that are ordered from an engineering office company. These parts were manufactured by Selective Laser Meting (SLM) technology and the original design done for conventional manufacturing is also presented and used for comparison purpose.
Collaborative and Participatory Design: Assignment of Team Members to Engineering Projects with the Consideration of Designer’s Expectations
Authors: Jin Guangying , Sperandio Séverine , Girard Philippe 
Published: July 2019

AbstractWith the trend of global collaboration and development of Internet of Things in industry 4.0, the collaboration relationships between designers is getting more close and important than before. Therefore, when project manager assign designers to design projects, it is very important for them to select design projects with the consider about the expectations of the designers regarding the different projects and collaboration ability for the designers in the projects while it is very important to identify the projects with the consideration of skills, experiences, availabilities and so on. Even though, there are various methods for selecting projects, most of these methods not consider about the expectations of designer and the collaboration ability. Therefore, in this paper, we propose a project selection methodology, which consider about the designers’ expectations to the candidate multi-project and collaboration ability in the candidate multi-project. The main objective of our research is to help project manager to find an adaptable and comfortable multi- project to the designer.
Automotive IVHM: Towards Intelligent Personalised Systems Healthcare
Authors: Campean Felician , Neagu Daniel , Doikin Aleksandr , Soleimani Morteza , Byrne Thomas , Sherratt Andrew 
Published: July 2019

AbstractUnderpinned by a contemporary view of automotive systems as cyber-physical systems, characterised by progressively open architectures increasingly defined by their interaction with the users and the smart environment, this paper provides a critical and up-to-date review of automotive Integrated Vehicle Health Management (IVHM) systems. The paper discusses the challenges with prognostics and intelligent health management of automotive systems, and proposes a high-level framework, referred to as the Automotive Healthcare Analytic Factory, to systematically collect and process heterogeneous data from across the product lifecycle, towards actionable insight for personalised healthcare of systems.
Design Principles to Increase the Patient Specificity of High Tibial Osteotomy Fixation Devices
Authors: Kanagalingam Sanjeevan , Shepherd Duncan , Fernandez-Vicente Miguel , Wimpenny David , Thomas-Seale Lauren 
Published: July 2019

AbstractHigh stiffness fracture fixation devices inducing absolute stability, activate inefficient primary healing and stress shielding. Taking High Tibial Osteotomy as a representative example, review of the clinical literature and mapping the fracture healing process revealed two physically contradicting requirements, which are only partially met by current techniques. Stiffness of the fixation is required immediately after fracture, however in the remodelling phase this can cause stress shielding. Stability is required immediately after fracture, however in the ossification phase less stability is required to stimulate secondary (and more efficient) healing. This study evaluates the use of the TRIZ Inventive Design Principles to overcome these physical contradictions. Six designs concepts were evaluated, of which the Macro-Geometry stiffness modulated design was ranked the highest. This was achieved through spatial decomposition of the problem utilising the Inventive Principles of Asymmetry, Extraction and Local Quality. This study offer perspectives on how to increase the patient specificity of fixation utilising the increased topology freedom of design for additive manufacture (AM).
Reduced isolation room turnover time using Lean methodology
Authors: Ankrum Andrea L. , Neogi Smriti , Morckel Molynda A. , Wilhite Adam W. , Li Zhaoyan , Schaffzin Joshua K. 
Published: July 2019

AbstractObjective:To prevent environmental transmission of pathogens, hospital rooms housing patients on transmission-based precautions are cleaned extensively and disinfected with ultraviolet (UV) light. To do so consistently requires time and coordination, and these procedures must avoid patient flow delays and associated safety risks. We sought to improve room turnover efficiency to allow for UV disinfection.Design:A 60-day quality improvement and implementation project.Setting:A quaternary academic pediatric referral facility.Interventions:A multidisciplinary healthcare team participated in a 60-day before-and-after trial that followed the Toyota Production System Lean methodology. We used value-stream mapping and manual time studies to identify areas for improvement. Areas addressed included room breakdown, room cleaning, and wait time between cleaning and disinfection. Room turnover was measured as the time in minutes from a discharged patient exiting an isolation room to UV disinfection completion. Impact was measured using postintervention manual time studies.Results:Median room turnover decreased from 130 minutes (range, 93–294 minutes) to 65 minutes (range, 48–95 minutes;P< .0001). Other outcomes included decreased median time between room breakdown to cleaning start time (from 10 to 3 minutes;P= .004), room cleaning complete to UV disinfection start (from 36 to 8 minutes;P< .0001), and the duration of room cleaning and curtain changing (from 57 to 37 minutes;P< .0001).Conclusion:We decreased room turnover time by half in 60 days by decreasing times between and during routine tasks. Utilizing Lean methodology and manual time study can help teams understand and improve hospital processes and systems.
“Communis Hostis Omnium”: The Smerwick Massacre (1580) and the Law of Nations
Authors: Orr D. Alan 
Published: July 2019

AbstractThis article examines the brutal massacre of up to six hundred Spanish and Italian papal troops on the order of the English Lord Deputy Arthur Grey, 14th Baron de Wilton (1536–1593), at Dún An Óir (Forto del Oro), Smerwick, County Kerry, on 10 November 1580. The article investigates the relationship between the religious and juridical rationales for the massacre, shedding new light on the broader relationship between the early modern law of nations, Protestantism, and what Brendan Bradshaw has characterized as “catastrophic violence” in the Elizabethan military conquest of Ireland. While Vincent Carey has emphasized the virulently anti-Catholic character of Grey's rationales for the massacre, my argument instead emphasizes the role of the received laws of nations and of war in justifying Grey's actions both to Queen Elizabeth I (1533–1603) and to the English public, from the period immediately following the massacre until the writing of Edmund Spenser's pro-Grey apologetic,A View of the Present State of Ireland(ca. 1596). On this view, the papal troops at Smerwick were considered brigands, pirates, or, in Marcus Tullius Cicero's words, “communis hostis omnium”—a common enemy to all—and enjoyed no standing as lawful enemies under the law of nations. In the sixteenth century, the established law of nations was hardly a seamless web but manifested significant cleavages and fissures allowing for the construction of localized spheres of legal exception in which the ordinary rules of warfare did not apply, thus providing a convenient juridical rationale for atrocity.
Wake behind a three-dimensional dry transom stern. Part 2. Analysis and modelling of incompressible highly variable density turbulence
Authors: Hendrickson Kelli , Yue Dick K.-P. 
Published: July 2019

We analyse the turbulence characteristics and consider the closure modelling of the air entraining flow in the wake of three-dimensional, rectangular dry transom sterns obtained using high-resolution implicit large eddy simulations (iLES) (Hendricksonet al.,J. Fluid Mech., vol. 875, 2019, pp. 854–883). Our focus is the incompressible highly variable density turbulence (IHVDT) in the near surface mixed-phase region${\mathcal{R}}$behind the stern. We characterize the turbulence statistics in${\mathcal{R}}$and determine it to be highly anisotropic due to quasi-steady wave breaking. Using unconditioned Reynolds decomposition for our analysis, we show that the turbulent mass flux (TMF) is important in IHVDT for the production of turbulent kinetic energy and is as relevant to the mean momentum equations as the Reynolds stresses. We develop a simple, regional explicit algebraic closure model for the TMF based on a functional relationship between the fluxes and tensor flow quantities.A prioritests of the model show mean density gradients and buoyancy effects are the main driving parameters for predicting the turbulent mass flux and the model is capable of capturing the highly localized nature of the TMF in${\mathcal{R}}$.
A direct numerical investigation of two-way interactions in a particle-laden turbulent channel flow
Authors: Peng Cheng , Ayala Orlando M. , Wang Lian-Ping 
Published: July 2019

Understanding the two-way interactions between finite-size solid particles and a wall-bounded turbulent flow is crucial in a variety of natural and engineering applications. Previous experimental measurements and particle-resolved direct numerical simulations revealed some interesting phenomena related to particle distribution and turbulence modulation, but their in-depth analyses are largely missing. In this study, turbulent channel flows laden with neutrally buoyant finite-size spherical particles are simulated using the lattice Boltzmann method. Two particle sizes are considered, with diameters equal to 14.45 and 28.9 wall units. To understand the roles played by the particle rotation, two additional simulations with the same particle sizes but no particle rotation are also presented for comparison. Particles of both sizes are found to form clusters. Under the Stokes lubrication corrections, small particles are found to have a stronger preference to form clusters, and their clusters orientate more in the streamwise direction. As a result, small particles reduce the mean flow velocity less than large particles. Particles are also found to result in a more homogeneous distribution of turbulent kinetic energy (TKE) in the wall-normal direction, as well as a more isotropic distribution of TKE among different spatial directions. To understand these turbulence modulation phenomena, we analyse in detail the total and component-wise volume-averaged budget equations of TKE with the simulation data. This budget analysis reveals several mechanisms through which the particles modulate local and global TKE in the particle-laden turbulent channel flow.
Interaction of linear modulated waves and unsteady dispersive hydrodynamic states with application to shallow water waves
Authors: Congy T. , El G. A. , Hoefer M. A. 
Published: July 2019

A new type of wave–mean flow interaction is identified and studied in which a small-amplitude, linear, dispersive modulated wave propagates through an evolving, nonlinear, large-scale fluid state such as an expansion (rarefaction) wave or a dispersive shock wave (undular bore). The Korteweg–de Vries (KdV) equation is considered as a prototypical example of dynamic wavepacket–mean flow interaction. Modulation equations are derived for the coupling between linear wave modulations and a nonlinear mean flow. These equations admit a particular class of solutions that describe the transmission or trapping of a linear wavepacket by an unsteady hydrodynamic state. Two adiabatic invariants of motion are identified that determine the transmission, trapping conditions and show that wavepackets incident upon smooth expansion waves or compressive, rapidly oscillating dispersive shock waves exhibit so-called hydrodynamic reciprocity recently described in Maiden et al. (Phys. Rev. Lett., vol. 120, 2018, 144101) in the context of hydrodynamic soliton tunnelling. The modulation theory results are in excellent agreement with direct numerical simulations of full KdV dynamics. The integrability of the KdV equation is not invoked so these results can be extended to other nonlinear dispersive fluid mechanic models.
Openness to experience predicts dopamine effects on divergent thinking
Authors: Käckenmester Wiebke , Bott Antonia , Wacker Jan 
Published: July 2019

Abstract
Individual differences in trait levels of openness to experience and creativity have been theoretically linked to dopamine function. However, empirical evidence for this assumption is scarce, especially for causal connections. The present study aims to directly assess the influence of dopamine activity on the established association between openness to experience and divergent thinking (i.e., an index of creativity). We hypothesized that manipulating dopamine activity alters the relationship between self-reported openness to experience and ideational fluency and flexibility. In a placebo-controlled between-subjects design, 193 healthy male volunteers completed four divergent thinking tasks after they received either the dopamine-receptor blocker sulpiride (200 mg) or a placebo. The data revealed an interaction such that openness to experience was more positively associated with divergent thinking in the dopamine blocker group (r = 0.304) than in the placebo group (r = −0.002). Specifically, highly open individuals in the dopamine blocker group reached the highest divergent thinking scores. Thus, sulpiride administration selectively affected divergent thinking as a function of trait levels of openness to experience. Although somewhat limited by the unexpected absence of the association between openness to experience and divergent thinking in the placebo group, the present study provides novel evidence for an association between dopamine activity and both openness to experience and divergent thinking.
Multilingualism in older age: A research agenda from the cognitive perspective
Authors: Cox Jessica G. 
Published: July 2019

AbstractCalls to diversify second language acquisition (SLA) (e.g., Ortega, 2013) have led to increased interest in multilingualism and inclusion of groups less represented in samples of university students, such as individuals at older ages. Nevertheless, we still have more questions than we do answers. This article outlines a research agenda targeting older adult language learning and multilinguals at older ages, both in and beyond the classroom. Since a key difference between young and older adults is cognitive aging, I follow a cognitive approach, focusing on how individual differences in cognition may affect language and vice versa, and how relevant sociocultural factors add to the interplay between language and cognition. Notably, this is not always a story of decline and deficits, but instead of both strengths and weaknesses that differ from those of young adults.
Unified Virtual Guides Framework for Path Tracking Tasks
Authors: Žlajpah Leon , Petrič Tadej 
Published: July 2019

SUMMARYIn this paper, we propose a novel unified framework for virtual guides. The human–robot interaction is based on a virtual robot, which is controlled by the admittance control. The unified framework combines virtual guides, control of the dynamic behavior, and path tracking. Different virtual guides and active constraints can be realized by using dead-zones in the position part of the admittance controller. The proposed algorithm can act in a changing task space and allows selection of the tasks-space and redundant degrees-of-freedom during the task execution. The admittance control algorithm can be implemented either on a velocity or on acceleration level. The proposed framework has been validated by an experiment on a KUKA LWR robot performing the Buzz-Wire task.