bluuebunny/crossref_metadata_2025_split huggingface dataset:
Intellectual Synthesis in Mentorship Determines Success in Academic Careers
Authors: Liénard Jean F. , Achakulvisut Titipat , Acuna Daniel E. , David Stephen V. 
Published: March 2018

AbstractAs academic careers become more competitive, junior scientists need to understand the value that mentorship brings to their success in academia. Previous research has found that, unsurprisingly, successful mentors tend to train successful students. But what characteristics of this relationship predict success, and how? We analyzed an open-access database of about 20,000 researchers who have undergone both graduate and postdoctoral training, compiled across several fields of biomedical science. Our results show that postdoctoral mentors were more instrumental to trainees’ success compared to graduate mentors. A trainee’s success in academia was predicted by the degree of intellectual synthesis with their mentors, resulting from fusing the influence of disparate advisors. This suggests that junior scientists should have increased chances of success by training with and linking the ideas of mentors from different fields. We discuss the implications of these results for choosing mentors and determining the duration of postdoctoral training.
Construction of poly-ellipsoidal grain shapes from SMT imaging on sand, and the development of a new DEM contact detection algorithm
Authors: Zhang Boning , Regueiro Richard , Druckrey Andrew , Alshibli Khalid 
Published: March 2018

PurposeThis paper aims to construct smooth poly-ellipsoid shapes from synchrotron microcomputed tomography (SMT) images on sand and to develop a new discrete element method (DEM) contact detection algorithm.Design/methodology/approachVoxelated images generated by SMT on Colorado Mason sand are processed to construct smooth poly-ellipsoidal particle approximations. For DEM contact detection, cuboidal shape approximations to the poly-ellipsoids are used to speed up contact detection.FindingsThe poly-ellipsoid particle shape approximation to Colorado Mason sand grains is better than a simpler ellipsoidal approximation. The new DEM contact algorithm leads to significant speedup and accuracy is maintained.Research limitations/implicationsThe paper limits particle shape approximation to smooth poly-ellipsoids.Practical implicationsPoly-ellipsoids provide asymmetry of particle shapes as compared to ellipsoids, thus allowing closer representation of real sand grain shapes that may be angular and unsymmetric. When incorporated in a DEM for computation, the poly-ellipsoids allow better representation of particle rolling, sliding and interlocking phenomena.Originality/valueMethod to construct poly-ellipsoid particle shapes from SMT data on real sands and computationally efficient DEM contact detection algorithm for poly-ellipsoids.
Uncertain dynamic responses of imprecisely defined arbitrary order fractionally damped beam subject to various loads
Authors: Behera Diptiranjan , Huang Hong-Zhong , Tapaswini Smita 
Published: March 2018

PurposeRecently, fractional differential equations have been used to model various physical and engineering problems. One may need a reliable and efficient numerical technique for the solution of these types of differential equations, as sometimes it is not easy to get the analytical solution. However, in general, in the existing investigations, involved parameters and variables are defined exactly, whereas in actual practice it may contain uncertainty because of error in observations, maintenance induced error, etc. Therefore, the purpose of this paper is to find the dynamic response of fractionally damped beam approximately under fuzzy and interval uncertainty.Design/methodology/approachHere, a semi analytical approach, variational iteration method (VIM), has been considered for the solution. A newly developed form of fuzzy numbers known as double parametric form has been applied to model the uncertainty involved in the system parameters and variables.FindingsVIM has been successfully implemented along with double parametric form of fuzzy number to find the uncertain dynamic responses of the fractionally damped beam. The advantage of this approach is that the solution can be written in power series or compact form. Also, this method converges rapidly to have the accurate solution. The uncertain responses subject to impulse and step loads have also been computed and the behaviours of the responses are analysed. Applying the double parametric form, it reduces the computational cost without separating the fuzzy equation into coupled differential equations as done in traditional approaches.Originality/valueUncertain dynamic responses of fuzzy fractionally damped beam using the newly developed double parametric form of fuzzy numbers subject to unit step and impulse loads have been obtained. Gaussian fuzzy numbers are used to model the uncertainties. In the methodology using the alpha cut form, corresponding beam equation is first converted to an interval-based fuzzy equation. Next, it has been transformed to crisp form by applying double parametric form of fuzzy numbers. Finally, VIM has been applied to solve the same for the general fuzzy responses. Various numerical examples have been taken in to consideration.
A new sequential sampling method for constructing the high-order polynomial surrogate models
Authors: Wu Jinglai , Luo Zhen , Zhang Nong , Gao Wei 
Published: March 2018

Purpose
This paper aims to study the sampling methods (or design of experiments) which have a large influence on the performance of the surrogate model. To improve the adaptability of modelling, a new sequential sampling method termed as sequential Chebyshev sampling method (SCSM) is proposed in this study.

Design/methodology/approach
The high-order polynomials are used to construct the global surrogated model, which retains the advantages of the traditional low-order polynomial models while overcoming their disadvantage in accuracy. First, the zeros of Chebyshev polynomials with the highest allowable order will be used as sampling candidates to improve the stability and accuracy of the high-order polynomial model. In the second step, some initial sampling points will be selected from the candidates by using a coordinate alternation algorithm, which keeps the initial sampling set uniformly distributed. Third, a fast sequential sampling scheme based on the space-filling principle is developed to collect more samples from the candidates, and the order of polynomial model is also updated in this procedure. The final surrogate model will be determined as the polynomial that has the largest adjusted R-square after the sequential sampling is terminated.

Findings
The SCSM has better performance in efficiency, accuracy and stability compared with several popular sequential sampling methods, e.g. LOLA-Voronoi algorithm and global Monte Carlo method from the SED toolbox, and the Halton sequence.

Originality/value
The SCSM has good performance in building the high-order surrogate model, including the high stability and accuracy, which may save a large amount of cost in solving complicated engineering design or optimisation problems.
Robust topology optimization for continuum structures with random loads
Authors: Liu Jie , Wen Guilin , Qing Qixiang , Li Fangyi , Xie Yi Min 
Published: March 2018

Purpose
This paper aims to tackle the challenge topic of continuum structural layout in the presence of random loads and to develop an efficient robust method.

Design/methodology/approach
An innovative robust topology optimization approach for continuum structures with random applied loads is reported. Simultaneous minimization of the expectation and the variance of the structural compliance is performed. Uncertain load vectors are dealt with by using additional uncertain pseudo random load vectors. The sensitivity information of the robust objective function is obtained approximately by using the Taylor expansion technique. The design problem is solved using bi-directional evolutionary structural optimization method with the derived sensitivity numbers.

Findings
The numerical examples show the significant topological changes of the robust solutions compared with the equivalent deterministic solutions.

Originality/value
A simple yet efficient robust topology optimization approach for continuum structures with random applied loads is developed. The computational time scales linearly with the number of applied loads with uncertainty, which is very efficient when compared with Monte Carlo-based optimization method.
Older and Wiser: How CEOs’ Time Perspective Influences Long‐Term Investments in Environmentally Responsible Technologies
Authors: Ortiz‐de‐Mandojana Natalia , Bansal Pratima , Aragón‐Correa J. Alberto 
Published: March 2018

AbstractMost theories of corporate governance argue that chief executive officers (CEOs) take less risk as they near the end of their career, and therefore are less likely to make major investments. This prediction is based on decisions related to firm‐specific benefits; however, it may not be generalizable to decisions that involve broad societal goals. In terms of societal investments, CEOs with a longer time perspective may be more likely, rather than less likely, to invest. In this paper, we argue that a CEO's future time perspective is fostered by shorter career horizons, longer tenures, higher organizational ownership and less short‐term compensation. We test these hypotheses on 150 observations from the US investor‐owned electric power generation sector over a three‐year unbalanced sample (64.3% of the population). We applied random‐effects generalized least squares (GLS) estimations to test our hypotheses, and found support for three out of four hypothesized relationships.
International Evidence on the Determinants of Organizational Ethical Vulnerability
Authors: Ullah Subhan , Ahmad Sardar , Akbar Saeed , Kodwani Devendra 
Published: March 2018

AbstractThis paper proposes a model to explain what makes organizations ethically vulnerable. Drawing upon legitimacy, institutional, agency and individual moral reasoning theories we consider three sets of explanatory factors and examine their association with organizational ethical vulnerability. The three sets comprise external institutional context, internal corporate governance mechanisms and organizational ethical infrastructure. We combine these three sets of factors and develop an analytical framework for classifying ethical issues and propose a new model of organizational ethical vulnerability. We test our model on a sample of 253 firms that were involved in ethical misconduct and compare them with a matched sample of the same number of firms from 28 different countries. The results suggest that weak regulatory environment and internal corporate governance, combined with profitability warnings or losses in the preceding year, increase organizational ethical vulnerability. We find counterintuitive evidence suggesting that firms’ involvement in bribery and corruption prevention training programmes is positively associated with the likelihood of ethical vulnerability. By synthesizing insights about individual and corporate behaviour from multiple theories, this study extends existing analytical literature on business ethics. Our findings have implications for firms’ external regulatory settings, corporate governance mechanisms and organizational ethical infrastructure.
From waste product to blood, brains and narratives: developing a pluralist sociology of contributions to health research
Authors: Boylan Anne‐Marie R. , Locock Louise , Machin Laura 
Published: March 2018

AbstractThe aim of this paper is to examine the meaning of the concept of donation in health research. Drawing on a set of narrative interviews with people invited to donate biosamples for research and a range of other studies, we identify several conceptual themes that speak to the complexity of the current landscape of critical thinking about donation. These conceptual themes are: the language of ‘donation’; a hierarchy of biosamples; alternative informational value; narratives as donation; coincidental donation, convenience and degree of invasiveness; and rights, consent and benefits of research participation. We call for a reconceptualisation of research donation to encompass not only the numerous types of sample readily classed as donations, but also other types of data and contributions, including narrative interviews, psychometric data, patient‐reported outcome measures, record‐linkage, and time and effort. We argue for the development of a pluralist sociology of research donations, and suggest that a ‘sociology of research contributions’ might better capture this complexity.
Sex Work, Sensory Urbanism and Visual Criminology: Exploring the Role of the Senses in Shaping Residential Perceptions of Brothels in Blackpool
Authors: Cooper Emily , Cook Ian R. , Bilby Charlotte 
Published: March 2018

AbstractUrban studies and criminology have much to offer each other, but the links between the two have so far been underexplored. This article is an illustration of how aspects of both can, and should, be brought into conversation: namely the literatures on sensory urbanism (in urban studies) and visual criminology. The benefits of doing so are evidenced by a case study exploring the ways in which the senses shape residents’ perceptions of brothels in Blackpool. Three key findings emerge from the case study. First, the residents interviewed tended to focus on the visual aspects of brothels rather than other sensory aspects. Nevertheless, touch and smell (and their interaction with the visual) also played small but important roles in shaping residential perceptions. Second, residential perceptions of sex work and brothels are linked to, and encompass, a plurality of emotional responses. Third, while the residents could see or hear little of what was happening inside the brothels, they often sought out sensory clues from outside, typically drawn from the architectural features of the brothels. Such insights, we argue, are made possible by, and highlight the possibilities of, the bringing together of urban studies and criminology.
Drug Contamination of U.S. Paper Currency and Forensic Relevance of Canine Alert to Paper Currency: A Critical Review of the Scientific Literature
Authors: Poupko Jay M. , Hearn William Lee , Rossano Federico 
Published: March 2018

AbstractSeveral studies have reported on wide‐spread contamination of U.S. paper currency with cocaine and to a lesser extent other illicit drugs. Canines are trained and employed to search for and alert to drugs. Canine alert to currency has been used as evidence that currency has been directly involved in illicit drug trafficking to justify currency seizure and forfeiture. This assertion, particularly when the only evidence is based upon canine alert, has been challenged in the courts considering that most currency in circulation is contaminated with cocaine. Comprehensive review of the scientific literature establishes that (i) 67–100% of circulated U.S. currency is contaminated with cocaine ranging from a few nanograms to over one milligram/bill (ii) various biological and environmental parameters impact canine alert to drugs. It is concluded that canine alert to U.S. currency is not sufficiently reliable to determine that currency was directly used in an illicit drug transaction.
Massively Parallel Sequencing of Forensic STRs Using the Ion Chef™ and the Ion S5™ XL Systems,
Authors: Wang Le , Chen Man , Wu Bo , Liu Yi‐Cheng , Zhang Guang‐Feng , Jiang Li , Xu Xiu‐Lan , Zhao Xing‐Chun , Ji An‐Quan , Ye Jian 
Published: March 2018

AbstractNext‐generation sequencing (NGS) has been used to genotype forensic short tandem repeat (STR) markers for individual identification and kinship analysis. STR data from several NGS platforms have been published, but forensic application trials using the Ion S5™ XL system have not been reported. In this work, we report sensitivity, reproducibility, mixture, simulated degradation, and casework sample data on the Ion Chef™ and S5™ XL systems using an early access 25‐plex panel. Sensitivity experiments showed that over 97% of the alleles were detectable with down to 62 pg input of genomic DNA. In mixture studies, alleles from minor contributors were correctly assigned at 1:9 and 9:1 ratios. NGS successfully gave 12 full genotype results from 13 challenging casework samples, compared with five full results using the CE platform. In conclusion, the Ion Chef™ and the Ion S5™ XL systems provided an alternative and promising approach for forensic STR genotyping.
Growth Patterns and Individual Variation in Mid‐sagittal Facial Soft Tissue Depth from Childhood to Adulthood
Authors: McKinnon Meghan R. , Simpson Ellie K. , Henneberg Maciej 
Published: March 2018

AbstractPrevious studies have used longitudinal samples to investigate growth of the skeletal aspects of the face, although far less has been done on facial soft tissue. This study uses a larger sample than previous studies on the same data (Denver and Fels growth series) to explore covariation of bony and soft facial dimensions comprehensively from childhood to adulthood. A total of 1036 lateral cephalometric radiographs were digitized from 60 individuals, and distances between facial landmarks were measured using ImageJ. Multivariate analysis of variance (MANOVA) showed all bony facial landmark distances were significantly different (p > 0.05) between age groups; however, only half were significantly different between sexes. Further analysis showed the effect of age (calculated as eta‐squared) explained a greater percentage of total variation (20%) than sex (15%). Overall, soft tissue changes between 0 and 19 years of age were small (<3 mm) and only some were correlated to underlying facial skeleton dimensions.
Influence Factors Regarding the Effectiveness of Automated Ballistic Comparison on 0.38 Special Caliber Bullets and Cartridge Cases
Authors: dos Santos Lehi Sudy , Vieira Muterlle Palloma 
Published: March 2018

AbstractFactors influencing effectiveness of automated comparisons, test‐fired bullets, and cartridge cases from 0.38 Special revolvers were logged into the Evofinder® Ballistic ID System. Tests were performed as follows: First test correlated test‐fires of the same type, second test compared different types of ammunition components, third test replicated the second test in a larger database, and fourth test replicated the third test with students having no previous firearm identification experience. System effectiveness with projectiles in the first test was 0.89. With cartridge cases, effectiveness was 0.79 with combined results, but analysis of separate results by breech face and firing pin revealed low effectiveness by breech face (0.40). In the second, third, and fourth tests, effectiveness with projectiles were 0.61, 0.51, and 0.44. In addition, these tests had effectiveness with cartridge cases equivalent to 0.55, 0.43, and 0.44. Results are useful to establish routine protocols, system improvements, or comparative assessment of other electronic systems.
Featured Collection Introduction: Connectivity of Streams and Wetlands to Downstream Waters
Authors: Alexander Laurie C. , Fritz Ken M. , Schofield Kate A. , Autrey Bradley C. , DeMeester Julie E. , Golden Heather E. , Goodrich David C. , Kepner William G. , Kiperwas Hadas R. , Lane Charles R. , LeDuc Stephen D. , Leibowitz Scott G. , McManus Michael G. , Pollard Amina I. , Ridley Caroline E. , Vanderhoof Melanie K. , Wigington Parker J. 
Published: March 2018

AbstractConnectivity is a fundamental but highly dynamic property of watersheds. Variability in the types and degrees of aquatic ecosystem connectivity presents challenges for researchers and managers seeking to accurately quantify its effects on critical hydrologic, biogeochemical, and biological processes. However, protecting natural gradients of connectivity is key to protecting the range of ecosystem services that aquatic ecosystems provide. In this featured collection, we review the available evidence on connections and functions by which streams and wetlands affect the integrity of downstream waters such as large rivers, lakes, reservoirs, and estuaries. The reviews in this collection focus on the types of waters whose protections under the U.S. Clean Water Act have been called into question by U.S. Supreme Court cases. We synthesize 40+ years of research on longitudinal, lateral, and vertical fluxes of energy, material, and biota between aquatic ecosystems included within the Act's frame of reference. Many questions about the roles of streams and wetlands in sustaining downstream water integrity can be answered from currently available literature, and emerging research is rapidly closing data gaps with exciting new insights into aquatic connectivity and function at local, watershed, and regional scales. Synthesis of foundational and emerging research is needed to support science‐based efforts to provide safe, reliable sources of fresh water for present and future generations.
Physical and Chemical Connectivity of Streams and Riparian Wetlands to Downstream Waters: A Synthesis
Authors: Fritz Ken M. , Schofield Kate A. , Alexander Laurie C. , McManus Michael G. , Golden Heather E. , Lane Charles R. , Kepner William G. , LeDuc Stephen D. , DeMeester Julie E. , Pollard Amina I. 
Published: March 2018

AbstractStreams, riparian areas, floodplains, alluvial aquifers, and downstream waters (e.g., large rivers, lakes, and oceans) are interconnected by longitudinal, lateral, and vertical fluxes of water, other materials, and energy. Collectively, these interconnected waters are called fluvial hydrosystems. Physical and chemical connectivity within fluvial hydrosystems is created by the transport of nonliving materials (e.g., water, sediment, nutrients, and contaminants) which either do or do not chemically change (chemical and physical connections, respectively). A substantial body of evidence unequivocally demonstrates physical and chemical connectivity between streams and riparian wetlands and downstream waters. Streams and riparian wetlands are structurally connected to downstream waters through the network of continuous channels and floodplain form that make these systems physically contiguous, and the very existence of these structures provides strong geomorphologic evidence for connectivity. Functional connections between streams and riparian wetlands and their downstream waters vary geographically and over time, based on proximity, relative size, environmental setting, material disparity, and intervening units. Because of the complexity and dynamic nature of connections among fluvial hydrosystem units, a complete accounting of the physical and chemical connections and their consequences to downstream waters should aggregate over multiple years to decades.