bluuebunny/crossref_metadata_2025_split huggingface dataset:
Robust trajectory tracking control for parameter perturbation power cable mobile operation robot system
Authors: Jiang Wei , Yan Yu , Yu Lianqing , Li Hong Jun , Du Lizhen , Chen Wei 
Published: November 2018

Purpose
In the high-altitude, high-voltage electromagnetic interference operation environment, due to the parameters perturbation for robot control model caused by uncertainties and disturbances, and with the poor effective of the conventional proportional–integral–derivative (PID) control to parameters perturbation system, the mathematical model of power cable live operation robot joint PID closed-loop control system is established.

Design/methodology/approach
The corresponding joint motion robust PID control method is also proposed based on Kharitonov theory, the system robust stability conditions including the sufficient and necessary conditions are deduced and obtained and the solving process of robust PID control parameters stability region is provided.

Findings
Finally, the simulation research on robot joint motion PID control system is also launched in MATLAB environment based on Kharitonov theory. The results show that the conventional PID control obtains better control effect only to nominal model but is ineffective to parameter perturbation system, while robust PID obtains sound control effect to parameter perturbation system. Compared with H8 robust PID, the Kharitonov robust PID has better control effect which meet the system design requirements of joint motor quickly response, high tracking accuracy and sound stability. Finally, the validity and engineering practicability are verified by 220-kV living replacing damper operation experiment.

Originality/value
This paper has described the development of a damper replacement power cable live maintenance robot experimental prototype, which greatly improves operation efficiency and deals with the safety problem of operation in a high-voltage environment. A general manipulator motion control model of the power cable robot is established; the Kharitonov theory-based parameter perturbation robust motion control method of damper replacement robot is also obtained. Through the simulation comparison, it is verified that the Kharitonov control has more superiority for dealing with the parameter perturbation systems under the premise of ensuring the stability motion. The field experiment has further confirmed the engineering practicability.
Speed dating or marriage? Brazilian business fairs according to a sample of metal/mechanic companies
Authors: Locatelli Débora Regina Schneider , Silveira Marco Antonio Pinheiro da , Mourão Paulo 
Published: November 2018

PurposeThis paper aims to focus on Brazilian business fairs primarily attended by metalworking companies.Design/methodology/approachUsing a qualitative and exploratory approach, data were collected through semi-structured interviews answered by exhibitor companies from two of the most relevant Brazilian states in this industrial sector: Santa Catarina and Rio Grande do Sul.FindingsThe results recognize the four pillars of the interorganizational relationship developed among exhibitors at business fairs and launch serious implications for the effective development of business fairs as spaces of interorganizational relationship and of value creation.Originality/valueThis is the first study discussing the trade fairs of the Brazilian emerging industry related to the metal-mechanic sector of two of the most significant states in the country: Rio Grande do Sul and Santa Catarina.
An investigation of magnet effect via overnight returns: the Malaysian case
Authors: Sifat Imtiaz , Mohamad Azhar , Hamid Zarinah 
Published: November 2018

Purpose
Magnet effect entails a hypothesis in market microstructure entailing a systemic likelihood of prices being sucked toward the theoretical threshold. The purpose of this paper is to investigate the existence of magnet effect in Bursa Malaysia via overnight returns.

Design/methodology/approach
This study investigates the existence of magnet effect via overnight returns in Bursa Malaysia by utilizing historical daily price data from 1994 to 2017 by probabilistic regression approaches. The authors divide the study period into three distinct regimes based on regulatory limit mechanisms.

Findings
Based on demarcated regimes, the authors find evidence of magnet effect in Bursa Malaysia throughout all regimes, with a heightened magnitude detected between 2002 and 2013. Moreover, upper limit scenarios exhibit a greater propensity for magnet effect. The authors end the paper with implications of the findings for portfolio managers, intraday traders, and policymakers.

Originality/value
The research is the first of its kind in attempting to measure the magnet effect in Malaysia via overnight jumps.
Selective crowdsourcing with various type task: models and analysis
Authors: Gou Qinglong , Deng Fangdi , He Yanyan 
Published: November 2018

PurposeSelective crowdsourcing is an important type of crowdsourcing which has been popularly used in practice. However, because selective crowdsourcing uses a winner-takes-all mechanism, implying that the efforts of most participants except the final winner will be just in vain. The purpose of this paper is to explore why this costly mechanism can become a popularity during the past decade and which type of tasks can fit this mechanism well.Design/methodology/approachThe authors propose a game model between a sponsor and N participants. The sponsor is to determine its reward and the participants are to optimize their effort-spending strategy. In this model, each participant's ability is the private information, and thus, all roles in the system face incomplete information.FindingsThe results of this paper demonstrate the following: whether the sponsor can obtain a positive expected payoff are determined by the type of tasks, while the complex tasks with a strong learning effect is more suitable to selective crowdsourcing, as for the other two types of task, the sponsor cannot obtain a positive payoff, or can just gain a rather low payoff; besides the task type, the sponsor's efficiency in using the solutions and the public's marginal cost also influence the result that whether the sponsor can obtain a positive surplus from the winner-takes-all mechanism.Originality/valueThe model presented in this paper is innovative by containing the following characteristics. First, each participant's ability is private information, and thus, all roles in the system face incomplete information. Second, the winner-takes-all mechanism is used, implying that the sponsor's reward will be entirely given to the participant with the highest quality solution. Third, the sponsor's utility from the solutions, as well as the public's cost to complete the task, are both assumed as functions just satisfying general properties.
Sustainability knowledge and training: outcomes and firm performance
Authors: Birou Laura M. , Green Kenneth W. , Inman R. Anthony 
Published: November 2018

PurposeThe purpose of this paper is to examine the impact of sustainability training and knowledge on sustainable supply chain practices (SSCP) and the resulting impact on sustainable supply chain outcomes (SSCO) and firm performance. It also provides a valid and reliable measure of SSCO.Design/methodology/approachData collected from 129 manufacturing managers are analyzed using a partial least squares structural equation modeling methodology. Manufacturing managers provide data reflecting the degree to which their organizations improved sustainability training and knowledge, utilize SSCP, the degree to which SSCO result, and the subsequent operational performance (OPP) and environmental economic performance (EEP).FindingsOrganizational sustainability training and knowledge positively impacts SSCP, and the utilization of SSCP results in SSCO which favorably impact OPP and EEP.Research limitations/implicationsThe study is limited to manufacturing organizations.Practical implicationsPractitioners are encouraged to improve organizational learning and training and are provided with a valid and reliable scale for measuring the outcomes of their sustainable practices. Combined with the work of others, this provides a framework for evaluating different aspects of sustainability with a firm.Social implicationsImproved green manufacturing practices improves the environment by eliminating all forms of waste and provides eco-friendly products and services.Originality/valueA sustainable supply chain training and knowledge model is proposed and empirically assessed. The results of this investigation support the proposition that sustainability training and knowledge support the implementation of sustainability supply chain practices which, in turn, improve sustainability outcomes and operational and EEP.
Institutional aspects of competence-based integration of retired military officers into the civilian labour market
Authors: Tūtlys Vidmantas , Winterton Jonathan , Liesionienė Odeta 
Published: November 2018

Purpose
The purpose of this paper is to highlight systemic factors of competence-based integration of retired military officers into the civilian labour market in terms of the perspective of the institutions and institutional settings of competence involved in the formation and deployment.

Design/methodology/approach
This study is based on semi-structured face-to-face interviews with 25 retired military officers in Lithuania.

Findings
The main institutional problems and challenges of the competence-based labour market integration of retired military officers involve are concentrated in the fields of deployment of skills in the military service, and as well as in the adjustment of acquired skills to the requirements of the civilian labour market.

Research limitations/implications
The main limitation of the research is the absence of perspectives and attitudes of other stakeholders such as policy makers, employers and providers of education and training.

Practical implications
Research identified expectations of retired military officers concerning improvement of training and labour market integration services.

Originality/value
The paper is focused on the institutional aspects of competence-based labour market integration of the retired military officers from their perspective.
Quantifying accuracy of a concept laser metal additive machine through the NIST test artifact
Authors: Weaver Jason M. , Barton T.J. , Linn John , Jenkins Derrik , Miles Michael P. , Smith Robert 
Published: November 2018

Purpose
The purpose of this paper is to describe the use of a test artifact proposed by NIST to quantify the dimensional accuracy of a metal additive manufacturing process. Insights from this paper are given concerning both the performance of the machine, a concept laser Mlab cusing machine, and the applicability of the NIST test artifact in characterizing accuracy. Recommendations are given for improving the artifact and standardizing a process for evaluating dimensional accuracy across the additive manufacturing industry.

Design/methodology/approach
Three builds of the NIST additive manufacturing test artifact were fabricated in 316 stainless steel on a concept laser Mlab cusing machine. The paper follows the procedure described by NIST for characterizing dimensional accuracy of the additive process. Features including pins, holes and staircase flats of various sizes were measured using an optical measurement system, a touch probe and a profilometer.

Findings
This paper describes the accuracy of printed features’ size and position on the test artifact, as well as surface finish on flat and inclined surfaces. Trends in variation of these dimensions are identified, along with possible root causes and remedies. This paper also describes several strengths and weaknesses in the design of the test artifact and the proposed measurement strategy, with recommendations on how to improve and standardize the process.

Originality/value
This paper reviews a previously proposed design and process for measuring the capabilities of additive manufacturing processes. It also suggests improvements that can be incorporated into future designs and standardized across the industry.
Environmental worldview beliefs and CSR advertising
Authors: Magee Robert G. 
Published: November 2018

PurposeThis paper aims to show how environment-related worldview beliefs, in addition to specific persuasion knowledge, can influence how a consumer responds to ads about corporate social responsibility (CSR) projects.Design/methodology/approachTwo experiments manipulated ad copy and consumers’ persuasion knowledge to examine the effects of consumers’ environmental worldview beliefs on their judgments of a firm’s CSR reforestation project.FindingsWhen an ad presented ambiguous information, both consumers’ persuasion knowledge and their environmental worldview influenced the attribution of the firm’s motives. When an ad presented environment-specific information, however, consumers’ worldview did not influence their attribution of motives. Attributions, in turn, predicted attitudes toward the ad and attitudes toward the brand and were associated with intentions for information-seeking and referral behavior.Research limitations/implicationsA consumer’s core beliefs can play an important role in understanding the application of persuasion knowledge, and the reinforcement-of-meaning principle expands the persuasion knowledge model’s explanatory power.Practical implicationsMarketing communications that involve social responsibility projects must take into account how core beliefs can influence the way consumers respond to projects.Social implicationsThis research demonstrates the importance of worldview beliefs in communication that takes place in the public sphere.Originality/valueThe experiments’ results contribute to a more robust understanding of the persuasion knowledge model, particularly as it applies to CSR messages and introduces the reinforcement-of-meaning principle.
Prognosis of metastatic head and neck squamous cell carcinoma over the last 30 years
Authors: Gnanasekaran Tharsiga , Low Hubert , Gupta Ruta , Gao Kan , Clark Jonathan 
Published: November 2018

BackgroundHead and neck cutaneous squamous cell carcinoma (HNcSCC) is one of the most common malignancies in Australia and consequently it is important to know whether patient outcomes have improved with time.MethodsAll patients with metastatic HNcSCC treated with curative intent were identified from the Sydney Head and Neck Cancer Institute database (1987–2016). Patients were grouped into 10‐year blocks from 1987, and disease‐specific survival (DSS) and overall survival were analysed. Estimated survivals were calculated using the Kaplan–Meier method and Cox regression.ResultsSince 1987, there has been an increase in the proportion of elderly patients (>75 years, P = 0.006) and the rate of adverse prognostic features including median node size (P = 0.047) and number of involved nodes (P < 0.001). Whereas the rate of adjuvant radiotherapy (RT) and comprehensive neck dissection has decreased (P = 0.014 and P < 0.001, respectively). Despite this, 5‐year DSS improved over the last 30 years from 57% during 1987–1996 to 88% during 2007–2016 (P < 0.001). This was particularly evident in patients treated with surgery followed by RT (P = 0.001), patients with extracapsular spread or soft tissue deposits (P < 0.001) and in patients with a single positive node (DSS, P = 0.007). On multivariable analysis, DSS has improved over time (hazard ratio 0.466 per 10 years bracket, 95% confidence interval 0.324–0.672, P < 0.001) after adjusting for the effect of age, presence of extracapsular spread or soft tissue deposits and adjuvant RT.ConclusionMedical advances have enabled us to treat older patients and more advanced metastatic HNcSCC and their prognosis appears to have improved over the past 30 years.
MKP‐1 promotes anti‐inflammatory M(IL‐4/IL‐13) macrophage phenotype and mediates the anti‐inflammatory effects of glucocorticoids
Authors: Pemmari Antti , Paukkeri Erja‐Leena , Hämäläinen Mari , Leppänen Tiina , Korhonen Riku , Moilanen Eeva 
Published: November 2018

AbstractMacrophage polarization refers to the ability of these cells to adopt different functional phenotypes according to their environment. Mitogen‐activated protein kinase phosphatase‐1 (MKP‐1) is known to regulate the classical lipopolysaccharide (LPS)‐induced pro‐inflammatory macrophage activation and the inflammatory response. Here, we investigated the effects of MKP‐1 on the anti‐inflammatory and healing‐promoting macrophage phenotype induced by cytokines IL‐4 and IL‐13 and examined the potential mediator role of MKP‐1 in glucocorticoid effects on the two macrophage phenotypes. In MKP‐1‐deficient macrophages treated with IL‐4 and IL‐13 to induce the anti‐inflammatory phenotype, the expression of phenotypic markers arginase 1, Ym‐1 and FGF2 was reduced as compared to wild‐type cells. In contrast, LPS‐induced expression of the pro‐inflammatory factors IL‐6 and iNOS was significantly higher in MKP‐1‐deficient macrophages. Dexamethasone suppressed the pro‐inflammatory phenotype and enhanced the anti‐inflammatory phenotype. Interestingly, both of these glucocorticoid effects were attenuated in macrophages from MKP‐1‐deficient mice. Accordingly, dexamethasone increased MKP‐1 expression in both LPS‐ and IL4+13‐treated wild‐type cells. In conclusion, the findings support MKP‐1 as an endogenous mechanism able to shift macrophage activation from the classical pro‐inflammatory state towards the anti‐inflammatory and healing‐promoting phenotype. In addition, MKP‐1 was found to mediate the anti‐inflammatory effects of dexamethasone in a dualistic manner: by suppressing the pro‐inflammatory macrophage activation and by enhancing the healing‐promoting macrophage phenotype.
Log-Ratio Lasso: Scalable, Sparse Estimation for Log-Ratio Models
Authors: Bates Stephen , Tibshirani Robert 
Published: November 2018

AbstractPositive-valued signal data is common in the biological and medical sciences, due to the prevalence of mass spectrometry other imaging techniques. With such data, only the relative intensities of the raw measurements are meaningful. It is desirable to consider models consisting of the log-ratios of all pairs of the raw features, since log-ratios are the simplest meaningful derived features. In this case, however, the dimensionality of the predictor space becomes large, and computationally efficient estimation procedures are required. In this work, we introduce an embedding of the log-ratio parameter space into a space of much lower dimension and use this representation to develop an efficient penalized fitting procedure. This procedure serves as the foundation for a two-step fitting procedure that combines a convex filtering step with a second non-convex pruning step to yield highly sparse solutions. On a cancer proteomics data set, the proposed method fits a highly sparse model consisting of features of known biological relevance while greatly improving upon the predictive accuracy of less interpretable methods.
Maternal Parenting Stress, Child Exuberance, and Preschoolers’ Behavior Problems
Authors: Tsotsi Stella , Broekman Birit F.P. , Shek Lynette P. , Tan Kok Hian , Chong Yap Seng , Chen Helen , Meaney Michael J. , Rifkin‐Graboi Anne E. 
Published: November 2018

This study investigated whether child exuberance, an aspect of temperament related to emotion regulation, moderates the well‐documented association between high parenting stress and increased risk for internalizing and externalizing problems during the preschool years. At 42 months of age child exuberance was observed in 256 children (47% girls) and maternal self‐reports on parenting stress were obtained. At 48 months internalizing and externalizing problems were assessed through reports from both parents. Indeed, higher maternal parenting stress increased the risk for internalizing problems, and this association was more pronounced among children with high levels of exuberance. Existent emotion regulation difficulties in highly exuberant children may further heighten the risk conveyed by an unfavorable caregiving environment for developing internalizing problems.
Temporal area approach for distributional data in biogeography
Authors: Dowding Elizabeth M. , Ebach Malte C. , Mavrodiev Evgeny V. 
Published: November 2018

AbstractA structural approach to temporality in distributional data for use in palaeobiogeography is described herein. Pre‐established areas in the distributional data matrix are split temporally, allowing a single geographical space to have multiple iterations [e.g. Area A (Lower Devonian), Area A (Middle Devonian)]. The resulting temporal matrix will allow the representation and capture of any differing relationships through time. Designed primarily for Parsimony Analysis of Endemicity (PAE) and biotic similarity analyses, this approach simply structures distributional data within a temporal partition, meaning that numerical methods can be used to assess relationships between areas to find a branching diagram. Created through the application of the temporal matrix to a given analysis, Temporal Area Approach (TAAp) is a structural approach that facilitates exploration of the data rather than being a hypothesis‐driven model following analysis. Understanding the behaviour of non‐phylogenetic palaeobiogeographical data and reducing the prevalence of temporal artefacts will lead to more robust area classifications.
Outcomes in human immunodeficiency virus‐infected recipients of heart transplants
Authors: Chen Chao , Wen Xuerong , Yadav Anju , Belviso Nicholas , Kogut Stephen , McCauley Jerry 
Published: November 2018

AbstractBackgroundWith the advent of combined antiretroviral therapy (cART), growing evidence has shown human immunodeficiency virus (HIV) may no longer be an absolute contraindication for solid organ transplantation. This study compares outcomes of heart transplantations between HIV‐positive and HIV‐negative recipients using SRTR transplant registry data.MethodsPatient survival, overall graft survival and death‐censored graft survival were compared between HIV‐positive and HIV‐negative recipients. Multivariate Cox regression and Cox regression with a disease risk score (DRS) methodology were used to estimate the adjusted hazard ratios among heart transplant recipients (HTRs).ResultsIn total, 35 HTRs with HIV+ status were identified. No significant differences were found in patient survival (88% vs 77%; P = 0.1493), overall graft survival (85% vs 76%; P = 0.2758), and death‐censored graft survival (91% vs 91%; P = 0.9871) between HIV‐positive and HIV‐negative HTRs in 5‐year follow‐up. No significant differences were found after adjusting for confounders.ConclusionsThis study supports the use of heart transplant procedures in selected HIV‐positive patients. This study suggests that HIV‐positive status is not a contraindication for life‐saving heart transplant as there were no differences in graft, patient survival.