bluuebunny/crossref_metadata_2025_split huggingface dataset:
Cooperative control of dual-arm robots in different human-robot collaborative tasks
Authors: Yu Xinbo , Zhang Shuang , Sun Liang , Wang Yu , Xue Chengqian , Li Bin 
Published: July 2019

Purpose
This paper aims to propose cooperative control strategies for dual-arm robots in different human–robot collaborative tasks in assembly processes. The authors set three different regions where robot performs different collaborative ways: “teleoperate” region, “co-carry” region and “assembly” region. Human holds the “master” arm of dual-arm robot to operate the other “follower” arm by our proposed controller in “teleoperation” region. Limited by the human arm length, “follower” arm is teleoperated by human to carry the distant object. In the “co-carry” region, “master” arm and “follower” arm cooperatively carry the object to the region close to the human. In “assembly” region, “follower” arm is used for fixing the object and “master” arm coupled with human is used for assembly.

Design/methodology/approach
A human moving target estimated method is proposed for decreasing efforts for human to move “master” arm, radial basis functions neural networks are used to compensate for uncertainties in dynamics of both arms. Force feedback is designed in “master” arm controller for human to perceive the movement of “follower” arm. Experimental results on Baxter robot platform show the effectiveness of this proposed method.

Findings
Experimental results on Baxter robot platform show the effectiveness of our proposed methods. Different human-robot collaborative tasks in assembly processes are performed successfully under our cooperative control strategies for dual-arm robots.

Originality/value
In this paper, cooperative control strategies for dual-arm robots have been proposed in different human–robot collaborative tasks in assembly processes. Three different regions where robot performs different collaborative ways are set: “teleoperation” region, “co-carry” region and “assembly” region.
The impact of monetary policy on option-implied stock market expectations
Authors: Wang Xiaoyu , Zhai Jia , Xie Dejun , Jiang Jingjing 
Published: July 2019

Purpose
The purpose of this paper is to investigate the impact of Federal Open Market Committee (FOMC) meetings and the changes of the target rates on stock market uncertainty.

Design/methodology/approach
Multivariate regression analysis is applied to the historical data of VIX, FOMC meetings and target rates. Subtle relations are revealed by further categorizing the FOMC meetings into being scheduled and unscheduled and distinguishing the signs of the changes in VIX and target rates. CPI and the prime rate are used for robustness test.

Findings
The authors first examine the relation between FOMC meetings and target surprises; the results indicate that unscheduled FOMC meetings heavily impact the target surprises. Then, the authors investigate the relation between FOMC meetings and VIX changes; the results show that both unscheduled and scheduled FOMC meetings impact VIX, where the impacts of scheduled FOMC meetings are more substantial. The authors also analyze the responses of VIX to the target surprises, and the results reveal that there is an asymmetric effect of target surprises on VIX, where the influences of the scheduled positive target surprises are more significant. Finally, by examining the relation between the FOMC meeting and the risk-neutral density of the VIX option, the authors conclude that both KURT and SKEW are more affected by unscheduled FOMC meetings.

Originality/value
Deeper dimensions of the relations between VIX, FOMC meetings and target rates are analyzed and more insightful understandings of such relations are gained.
Effects of hydrogen relative humidity on the performance of an air-breathing PEM fuel cell
Authors: Chen Zhenxiao , Ingham Derek , Ismail Mohammed , Ma Lin , Hughes Kevin J. , Pourkashanian Mohamed 
Published: July 2019

Purpose
The purpose of this paper is to investigate the effects of hydrogen humidity on the performance of air-breathing proton exchange membrane (PEM) fuel cells.

Design/methodology/approach
An efficient mathematical model for air-breathing PEM fuel cells has been built in MATLAB. The sensitivity of the fuel cell performance to the heat transfer coefficient is investigated first. The effect of hydrogen humidity is also studied. In addition, under different hydrogen humidities, the most appropriate thickness of the gas diffusion layer (GDL) is investigated.

Findings
The heat transfer coefficient dictates the performance limiting mode of the air-breathing PEM fuel cell, the modelled air-breathing fuel cell is limited by the dry-out of the membrane at high current densities. The performance of the fuel cell is mainly influenced by the hydrogen humidity. Besides, an optimal cathode GDL and relatively thinner anode GDL are favoured to achieve a good performance of the fuel cell.

Practical implications
The current study improves the understanding of the effect of the hydrogen humidity in air-breathing fuel cells and this new model can be used to investigate different component properties in real designs.

Originality/value
The hydrogen relative humidity and the GDL thickness can be controlled to improve the performance of air-breathing fuel cells.
Examining the role of narratives in civic crowdfunding: linguistic style and message substance
Authors: Lee Chang Heon , Bian Yiyang , Karaouzene Rajaa , Suleiman Nasreen 
Published: July 2019

PurposeThe purpose of this paper is to explore how linguistic style and message substance influence persuasion in civic crowdfunding marketplaces in which written narrative pitch become a vital communication to attract private contributions to public goods and services. Drawing on the elaboration likelihood model (ELM), the authors operationalize the linguistic style of the narrative pitch as language power and message substance as issue-relevant argument quality. In this paper, the authors examine how characteristics of both style and message are related to the outcome of civic crowdfunded projects.Design/methodology/approachThe data on civic crowdfunding projects were retrieved from Spacehive, the platform that dedicated mainly to civic projects ranging from community programs, social-oriented enterprises, to infrastructure or facility development. Each of the narrative samples is analyzed using a computerized text analysis package called the Linguistic Inquiry and Word Count to extract the features of the linguistic style and message substance in the narratives. The logistic regression models are estimated to assess the impact of both linguistic style and message substance on crowdfunding decisions.FindingsThe results show that funding outcomes can be improved with psychological language dimensions (i.e. positive affective and perceptual language). However, extensive use of social language does not help project creators to increase their chance of funding performance; but instead, such language reduces the likelihood of project success. Additionally, message substance or issue-relevant information such as money and risk language influences funding outcome.Originality/valueVery few empirical studies investigated the differential effects of language style and message substance on funding performance of crowdfunding campaigns. The authors draw upon the dual process of persuasion as a theoretical base to identify a comprehensive set of linguistic style and message substance and to examine the role of such features in an emerging civic crowdfunding market. This study advances the application of the dual process in ELM by identifying and examining distinct persuasive cues originating from linguistics styles and message contents.
Towards a diversified knowledge organization system
Authors: Zhitomirsky-Geffet Maayan 
Published: July 2019

PurposeThe need for inclusive and logically consistent representation of diverse and even confronting viewpoints on the domain knowledge has been widely discussed in the literature in the past decade. The purpose of this paper is to propose a generic model for building an open coherent diversified knowledge organization system (KOS).Design/methodology/approachThe proposed model incorporates a generic epistemological component, the validity scope type, assigned to each statement in the constructed KOS. Statements are clustered by their association with various validity scope types into internally coherent subsystems. These subsystems form a knowledge organization network connected through the universal (consensual) subsystems with more than one validity scope type. The model extends the Galili’s Cultural Content Representation paradigm, which divides the knowledge content of a scientific theory into two confronting parts: body and periphery.FindingsThe knowledge organization network model makes it possible to comparatively examine similarities and differences among various viewpoints and theories on the domain knowledge. The presented approach conforms with the principle of Open Knowledge Network initiative for creation of open accessible knowledge.Practical implicationsThe proposed model can be used for ontological reasoning by a variety of information services, such as ontology-based decision-support and learning systems, diversified search and customer management applications.Social implicationsThe model enables explicit representation of social and cultural minority voices and historical knowledge in the KOS.Originality/valueThe main contribution of the proposed model is that it generalizes and enhances various previously proposed representations of epistemological aspects of KOS and allows for multiple inter-linked subsystems to coherently co-exist as part of the extensible network.
Infliximab reduces activated myeloid dendritic cells, different macrophage subsets and CXCR3‐positive cells in granuloma annulare
Authors: Bürgler Christina , Vinay Keshavamurthy , Häfliger Stefanie , Klötgen Hans‐Wilhelm , Yawalkar Nikhil 
Published: July 2019

AbstractDisseminated granuloma annulare (GA) is a rare granulomatous dermatitis of unknown etiology. Treatment is often challenging and lack of a uniformly effective treatment, adds to the disease morbidity. Tumor necrosis factor (TNF)‐α is an important cytokine in granuloma formation and previous reports have shown improvement of disseminated GA with anti‐TNF‐α therapy. Nevertheless, the underlying mechanism of actions of TNF‐α inhibitors in GA remains unclear. Our aim was to evaluate alterations in the inflammatory infiltrate in a patient who experienced complete clearance of GA after treatment with infliximab. A skin biopsy was obtained before and 24 weeks after treatment with infliximab 5 mg/kg at weeks 0, 2, 6, 14 and 24. Immunohistochemical stains were performed in pre‐ and post‐treatment biopsy specimens using CD1a, CD4, CD8, CD11c, CD32, CD68, CD69, CD163, CD183 and human leukocyte antigen (HLA)‐DR to characterize alterations of the infiltrates. Parallel with clinical improvement, we observed a marked decrease in myeloid (CD11c) dendritic cells, different macrophage subsets (CD68, CD32, CD163) and T cells. In addition, a marked reduction of activation markers (HLA‐DR, CD69) and CD183+ (CXCR3) cells was observed in post‐treatment biopsy specimens. In conclusion, the clinical improvement of disseminated GA by infliximab is paralleled by inhibition of activated myeloid dendritic cells, different macrophage subsets and type 1 T cells.
The tropical backyard: performing environmental difference
Authors: Law Lisa 
Published: July 2019

AbstractThis paper extends debates investigating the importance of domestic yards and gardens in shaping identities and the everyday practices and performances of human–nature interaction in a tropical city. It presents findings from a pilot study investigating backyards in a small but ethnically diverse neighbourhood in Cairns, Australia—a site that raises questions about the normative constructions of “nature” in much of the literature. The paper explores how Cairns residents make sense of their backyards, especially in terms of how they relate to them as “tropical”. Living in Cairns means managing excess water during the rainy season, dealing with new kinds of pests, and being critically conscious of the temperate bias of Australian garden retailers and house/garden magazines. The paper frames these experiences within a longer tradition of tropicality or a (western) way of making sense of/imagining tropical regions and environmental difference. In so doing, it opens up a new cultural geography of the suburbs, displaces normative constructions of “nature” and shows how the legacies of European colonialism still play out in a dominant Australian culture.
Valuing product innovation: genetically engineered varieties in US corn and soybeans
Authors: Ciliberto Federico , Moschini GianCarlo , Perry Edward D. 
Published: July 2019

AbstractWe develop a discrete‐choice model of differentiated products for US corn and soybean seed demand to study the welfare impact of genetically engineered (GE) crop varieties. Using a unique data set spanning the period 1996–2011, we find that the welfare impact of the GE innovation is significant. In the last five years of the period analyzed, our preferred counterfactual indicates that total surplus due to GE traits was $5.18 billion per year, with seed manufacturers appropriating 56% of this surplus. The seed industry obtained more surplus from GE corn, whereas farmers received more surplus from GE soybeans.
Detection, molecular characterisation and aspects involving the transmission of tomato chlorotic dwarf viroid in eggplant
Authors: Gramazio Pietro , Lerma María D. , Villanueva Gloria , Vilanova Santiago , García‐Fortea Edgar , Mangino Giulio , Figàs Maria R. , Arrones Andrea , Alonso David , San Bautista Alberto , Soler Salvador , Prohens Jaime , Plazas Mariola 
Published: July 2019

AbstractTomato chlorotic dwarf viroid (TCDVd) is a pospiviroid that causes severe disease symptoms in tomato. TCDVd is also naturally found in other crops and plants, in most occasions being asymptomatic. Apart from the natural hosts reported up to now, artificial inoculations have revealed that TCDVd can infect other plants, including eggplant (Solanum melongena). In a screening of seedlings of eggplant from a breeding programme we detected a pospiviroid, which we identified as TCDVd, representing the first report of natural infection of eggplant by TCDVd. The new TCDVd isolate of eggplant was detected by reverse transcription polymerase chain reaction (RT‐PCR) using primers TG21/CT20, initially designed to detect potato spindle tuber viroid. The new isolate sequence is close to a Brugmansia sanguinea isolate of TCDVd from the Netherlands, and most of the nucleotidic changes with respect to this isolate and to the reference genome sequence of TCDVd are found in the TR region. Naturally infected plants of eggplant with this TCDVd isolate did not display any disease symptoms. We demonstrated that in eggplant TCDVd is mechanically transmitted with low to moderate efficiency with cultivation practices, but not by plant‐to‐plant contact. Tomato plants artificially inoculated with the eggplant isolate of TCDVd tested positive for the presence of the viroid at 50 days after inoculation, but did not display any disease symptoms. Seed transmission to germinated seedlings of eggplant was variable among progenies from infected plants, ranging from 7.7% to 100.0%. Disinfection of seeds with chemical treatments with sodium hypochlorite and trisodium phosphate solutions plus thermotherapy at 80°C for 24 hr or 90°C for 6 hr was ineffective in reducing the rate of transmission by seed. We did not find evidence of horizontal transmission of TCDVd by pollen, but vertical transmission was highly efficient when healthy eggplant plants were pollinated with infected pollen. Our results indicate that asymptomatic infection of eggplant by TCDVd and high seed and pollen transmission rates may contribute to the spread of this viroid. The information we obtained is useful in order to implement measures for the prevention, control and eradication of TCDVd in eggplant crops, as well as to avoid their transmission to other hosts.
Risk Factors for Overdose in Young People Who Received Substance Use Disorder Treatment
Authors: Yule Amy M. , Carrellas Nicholas W. , DiSalvo Maura , Lyons Rachael M. , McKowen James W. , Nargiso Jessica E. , Bergman Brandon G. , Kelly John F. , Wilens Timothy E. 
Published: July 2019

Background and ObjectivesTo identify substance and psychiatric predictors of overdose (OD) in young people with substance use disorders (SUDs) who received treatment.MethodsWe conducted a retrospective review of consecutive medical records of young people who were evaluated in a SUD program between 2012 and 2013 and received treatment. An independent group of patients from the same program who received treatment and had a fatal OD were also included in the sample. OD was defined as substance use associated with a significant impairment in level of consciousness without intention of self‐harm, or an ingestion of a substance that was reported as a suicide attempt. t Tests, Pearson's χ2, and Fisher's exact tests were performed to identify predictors of OD after receiving treatment.ResultsAfter initial evaluation, 127 out of 200 patients followed up for treatment and were included in the sample. Ten (8%) of these patients had a nonfatal OD. Nine patients who received treatment and had a fatal OD were also identified. The sample's mean age was 20.2 ± 2.8 years. Compared with those without OD, those with OD were more likely to have a history of intravenous drug use (odds ratio [OR]: 36.5, P < .001) and mood disorder not otherwise specified (OR: 4.51, P = .01).Discussion and ConclusionsIntravenous drug use and mood dysregulation increased risk for OD in young people who received SUD treatment.Scientific SignificanceIt is important to identify clinically relevant risk factors for OD specific to young people in SUD treatment due to the risk for death associated with OD. (Am J Addict 2019;28:382–389)
The efficacy of HBOC‐201 in ex situ gradual rewarming kidney perfusion in a rat model
Authors: Mahboub Paria , Aburawi Mohamed , Karimian Negin , Lin Florence , Karabacak Murat , Fontan Fermin , Tessier Shannon N. , Markmann James , Yeh Heidi , Uygun Korkut 
Published: July 2019

AbstractGradual rewarming from hypothermic to normothermic is a novel perfusion modality with superior outcome to sudden rewarming to normothermic. However, the identification of an oxygen carrier that could function at a temperature range from 4 to 7°C or whether it is necessary to use oxygen carrier during kidney rewarming, remains unresolved. This study was designed to test the use of a hemoglobin‐based oxygen carrier (HBOC) during gradual kidney rewarming as an alternative to simple dissolved oxygen. In this study, 10 rat kidneys were randomly divided into the control and the HBOC group. In the control group, no oxygen carrier was used during rewarming perfusion and the perfusion solution was oxygenated only by applying diffused carbogen flow. The protocol mimicked a donor after circulatory death (DCD) kidney transplantation, where after 30 minutes warm ischemia and 120 minutes cold storage in University of Wisconsin solution, the DCD kidneys underwent gradual rewarming from 10 to 37°C during 90 minutes with or without HBOC. This was followed by 30 minutes of warm ischemia in room temperature to mimic the anastomosis time and 120 minutes of reperfusion at 37°C to mimic the early post‐transplant state of the graft. The HBOC group demonstrated superior kidney function which was highlighted by higher ultrafiltrate production, better glomerular filtration rate and improved sodium reabsorption. There was no significant difference between the 2 groups regarding the hemodynamics, tissue injury, and adenosine triphosphate levels. In conclusion, this study suggests better renal function recovery in DCD kidneys after rewarming with HBOC compared to rewarming without an oxygen carrier.
The effect of gastrectomy on regorafenib exposure and progression‐free survival in patients with advanced gastrointestinal stromal tumours
Authors: Lubberman Floor J.E. , van der Graaf Winette T.A. , Xu Lei , Cleton Adriaan , Demetri George D. , Gelderblom Hans , van Erp Nielka P. 
Published: July 2019

AimsWe investigated whether major gastrectomy influences the plasma exposure of regorafenib and treatment outcome.MethodsEfficacy and pharmacokinetic data from 133 gastrointestinal stromal tumour patients included in a phase III trial were analysed. Patients were subdivided into 2 groups according to the extent of the gastrectomy (no/nonsignificant gastrectomy and major gastrectomy). Progression‐free survival (PFS) on regorafenib was measured and regorafenib and its pharmacological active metabolites plasma exposure were measured.ResultsA total of 133 patient were included, of whom 27 underwent major gastrectomy. In patients with no/nonsignificant gastrectomy the median PFS was 145 (interquartile range 43–281) days. The PFS in patients with a major gastrectomy was 172 (interquartile range 57–280) days. Regorafenib pharmacokinetic samples were collected in 80 patients of which 19 patients with a major gastrectomy and 61 patients with no/nonsignificant gastric surgery. The average ± standard deviation total concentration of regorafenib including the metabolites M‐2 and M‐5 was 6.9 ± 1.53 μmol/L and 6.7 ± 1.56 μmol/L in patient with major gastrectomy and no/nonsignificant gastrectomy respectively.ConclusionOur study shows that major gastrectomy did not influence plasma exposure of regorafenib and metabolites. In addition, no difference in PFS between the subgroups was seen.
Toward Understanding Representation Methods in Visualization Recommendations through Scatterplot Construction Tasks
Authors: L'Yi Sehi , Chang Youli , Shin DongHwa , Seo Jinwook 
Published: July 2019

AbstractMost visualization recommendation systems predominantly rely on graphical previews to describe alternative visual encodings. However, since InfoVis novices are not familiar with visual representations (e.g., interpretation barriers [GTS10]), novices might have difficulty understanding and choosing recommended visual encodings. As an initial step toward understanding effective representation methods for visualization recommendations, we investigate the effectiveness of three representation methods (i.e., previews, animated transitions, and textual descriptions) under scatterplot construction tasks. Our results show how different representations individually and cooperatively help users understand and choose recommended visualizations, for example, by supporting their expect‐and‐confirm process. Based on our study results, we discuss design implications for visualization recommendation interfaces.
Visualizing for the Non‐Visual: Enabling the Visually Impaired to Use Visualization
Authors: Choi Jinho , Jung Sanghun , Park Deok Gun , Choo Jaegul , Elmqvist Niklas 
Published: July 2019

AbstractThe majority of visualizations on the web are still stored as raster images, making them inaccessible to visually impaired users. We propose a deep‐neural‐network‐based approach that automatically recognizes key elements in a visualization, including a visualization type, graphical elements, labels, legends, and most importantly, the original data conveyed in the visualization. We leverage such extracted information to provide visually impaired people with the reading of the extracted information. Based on interviews with visually impaired users, we built a Google Chrome extension designed to work with screen reader software to automatically decode charts on a webpage using our pipeline. We compared the performance of the back‐end algorithm with existing methods and evaluated the utility using qualitative feedback from visually impaired users.