bluuebunny/crossref_metadata_2025_split huggingface dataset:
Behavioral flexibility in an OCD mouse model: Impaired Pavlovian reversal learning in SAPAP3 mutants
Authors: van den Boom Bastijn J. G. , Mooij Adriana H. , Misevičiūtė Ieva , Denys Damiaan , Willuhn Ingo 
Published: October 2018

ABSTRACTObsessive-compulsive disorder (OCD) is characterized by obsessive thinking, compulsive behavior, and anxiety, and is often accompanied by cognitive deficits. The neuropathology of OCD involves dysregulation of cortical-striatal circuits. Similar to OCD patients, SAPAP3 knockout mice 3 (SAPAP3−/−) exhibit compulsive behavior (grooming), anxiety, and dysregulated cortical-striatal function. However, it is unknown whether SAPAP3−/− display cognitive deficits and how these different behavioral traits relate to one another. SAPAP3−/− and wild-type littermates (WT) were trained in a Pavlovian conditioning task pairing the delivery of visual cues with that of sucrose solution. After mice learned to discriminate between a reward-predicting conditioned stimulus (CS+) and a non-reward stimulus (CS−), contingencies were reversed (CS+ became CS− and vice versa). Additionally, we assessed grooming, anxiety, and general activity. SAPAP3−/− acquired Pavlovian approach behavior similarly to WT, albeit less vigorously and with a different strategy. However, unlike WT, SAPAP3−/− were unable to adapt their behavior after contingency reversal, exemplified by a lack of re-establishing CS+ approach behavior (sign tracking). Surprisingly, such behavioral inflexibility, decreased vigor, compulsive grooming, and anxiety were unrelated. This study demonstrates that SAPAP3−/− are capable of Pavlovian learning, but lack flexibility to adapt associated conditioned approach behavior. Thus, SAPAP3−/− do not only display compulsive-like behavior and anxiety, but also cognitive deficits, confirming and extending the validity of SAPAP3−/− as a suitable model for OCD. The observation that compulsive-like behavior, anxiety, and behavioral inflexibility were unrelated suggests a non-causal relationship between these traits and may be of clinical relevance for OCD patients.
Non-fragile consensus control of networked robotic manipulators with topology-dependent memory
Authors: Ma Chao , Li Rui , Qiao Hong 
Published: October 2018

Purpose
The purpose of this paper is to solve the non-fragile consensus problem of networked robotic manipulators over communication networks by using information from topology-dependent memory.

Design/methodology/approach
This paper proposes a topology-dependent memory protocol with distributed consensus controllers for multiple networked robotic manipulators.

Findings
The distributed controller gain fluctuations are taken into account with sampled data information exchanges. By the derived results of model transformation, the topology-dependent memory protocol is investigated using sufficient consensus criteria in the form of linear matrix inequalities.

Originality/value
A novel consensus protocol with topology-dependent memory is designed, which can potentially improve consensus performance and deal with the controller gain fluctuations of the robotic manipulators in practical applications.
The learning-based optimization algorithm for robotic dual peg-in-hole assembly
Authors: Hou Zhimin , Philipp Markus , Zhang Kuangen , Guan Yong , Chen Ken , Xu Jing 
Published: October 2018

Purpose
This paper aims to present an optimization algorithm combined with the impedance control strategy to optimize the robotic dual peg-in-hole assembly task, and to reduce the assembly time and smooth the contact forces during assembly process with a small number of experiments.

Design/methodology/approach
Support vector regression is used to predict the fitness of genes in evolutionary algorithm, which can reduce the number of real-world experiments. The control parameters of the impedance control strategy are defined as genes, and the assembly time is defined as the fitness of genes to evaluate the performance of the selected parameters.

Findings
The learning-based evolutionary algorithm is proposed to optimize the dual peg-in-hole assembly process only requiring little prior knowledge instead of modeling for the complex contact states. A virtual simulation and real-world experiments are implemented to demonstrate the effectiveness of the proposed algorithm.

Practical implications
The proposed algorithm is quite useful for the real-world industrial applications, especially the scenarios only allowing a small number of trials.

Originality/value
The paper provides a new solution for applying optimization techniques in real-world tasks. The learning component can solve the data efficiency of the model-free optimization algorithms.
Medical undergraduate students’ perception towards the use and non-use of e-books: a case from Pakistan
Authors: Rafiq Sadaf , Warraich Nosheen Fatima 
Published: October 2018

PurposeThe purpose of this study is to explore the perception of medical undergraduate students regarding their behavior towards use and non-use of e-books. It also elucidates their preferences between print and electronic book format.Design/methodology/approachIt is a quantitative study based on survey method. A semi-structured questionnaire was used to collect the data from final year medical students of three medical colleges of Lahore, Pakistan. Statistical package for social sciences (SPSS) was used to analyse 232 useable questionnaires.FindingsThe findings indicate that the use and non-use of e-books is almost equal among students. The students who use e-books mostly access them through Google books, and they used e-books for academic purpose. Users were convinced about the benefits of e-books such as easy access, 24/7 availability and up-to-date information. However, users and non-users of e-books preferred to use printed version of books. Non-users identified that e-books often distract them because of different links on the website, and they do not want to change their habit of reading printed books. Moreover, they are satisfied with printed books available in their libraries and hesitant to read on screen.Research limitations/implicationsThe present study is limited to the medical sciences; its results cannot be generalizing to other academic disciplines.Practical implicationsThe findings of the study will assist the medical libraries to improve their e-books collection and also negotiate the publishers for its licence issues. The study will also encourage the librarians to acquire handheld devices and load them with e-books for their users.Originality/valueThis is believed to be the first study on the use of e-books in the perspective of medical students in Pakistan.
Twenty years of S&T priority setting in Russia: lessons learned
Authors: Sokolova Anna , Grebenyuk Anna , Sokolov Alexander 
Published: October 2018

Purpose
This paper aims to present a retrospective analysis of the experience gained in the course of 20 years’ history of S&T priority setting and critical technologies’ identification, in terms of expected and actually achieved effects and lessons learned.

Design/methodology/approach
The methodology is based on analysing project documentation and reports, as well as on interviewing project team members. Each project’s effects are evaluated in terms of the six key foresight functions.

Findings
The key factors affecting success of priority S&T areas and critical technologies’ selection and implementation have been identified. They include focusing on practical implementation, linking S&T with socio-economic goals, combining thematic priorities with infrastructural and functional ones, as well as integrating priority selection in the S&T policy process.

Research limitations implications
The task of evaluating priority setting exercises over a long period requires a substantial information base to provide a comprehensive comparative analysis. The projects considered in the paper also need to be analysed in a context of socio-economic development.

Practical implications
The lessons learned presented in the paper could contribute to further development of approaches to selecting science and technology priorities and critical technologies, and their more efficient implementation.

Originality value
Priority setting has significant influence on policymaking and decision-making at the national and industry level. The evaluation of a unique 20-year experience provides substantial information and practical hints for further increasing efficacy of this instrument.
Effect of roller dynamic unbalance on cage stress of high-speed cylindrical roller bearing
Authors: Cui Yongcun , Deng Sier , Ni Yanguang , Chen Guoding 
Published: October 2018

Purpose
The purpose of this study is to investigate the effect of roller dynamic unbalance on cage stress.

Design/methodology/approach
Considering the impact of roller dynamic unbalance, the dynamic analysis model of high-speed cylindrical roller bearing is established. And then the results of dynamic model are used as the boundary conditions for the finite element analysis model of roller and cage to obtain the cage stress.

Findings
Roller dynamic unbalance affects the contact status between roller and cage pocket and causes the overall increase in cage stress. The most significant impact on cage stress is roller dynamic unbalance in angular direction of roller axis, followed by radial and axial directions. Smaller radial clearance of bearing and a reasonable range of pocket clearance are beneficial to reduce the impact of roller dynamic unbalance on cage stress; the larger cage guide clearance is a disadvantage to decrease cage stress. The impact of roller dynamic unbalance on cage stress under high-speed condition is greater than that in low-speed conditions.

Originality/value
The research can provide some theoretical guidance for the design and manufacture of bearing in high-speed cylindrical roller bearing.
Analysis of dynamic characteristics of spiral groove liquid film seal considering cavitation
Authors: Hao Mu-ming , Yang Wen-jing , Cao Heng-chao , Xu Lu-shuai , Wang Yun-lei , Li Yong-fan 
Published: October 2018

Purpose
The purpose of this paper is to investigate the dynamic characteristics of a spiral groove liquid film seal considering the effect of cavitation.

Design/methodology/approach
A mathematical model of a spiral groove liquid film seal was established based on the mass-conserving Jakobsson–Floberg–Olsson cavitation boundary condition. The film rupture and film reformation boundaries were assumed to be unchanged under infinitesimal perturbation conditions. Governing equations under steady and perturbed states were solved by the finite element method, and then the dynamic characteristics of the spiral groove liquid film seal were theoretically investigated considering the effect of cavitation.

Findings
The results indicate that dynamic coefficients considering cavitation are smaller than those neglecting cavitation. The difference value is consistent with the change in cavitation area. The liquid film seal does not suffer axial instability whether considering cavitation, but its angular instability is more likely to occur when cavitation is considered.

Originality/value
For liquid lubricated non-contacting mechanical seals, the dynamic characteristics considering cavitation are investigated. The results are expected to provide a theoretical basis for improving the design method of liquid film seals.
Impacts of classic transaction cost-related factors on partner’s cooperative and opportunistic behaviour in joint ventures
Authors: Xue Jinjie , Yuan Hongping , Geng Zizhen 
Published: October 2018

PurposeThis study aims to investigate impacts of classic transaction cost-related factors (i.e. partner selection cost, specific asset investment and extorting rent cost) on joint venture (JV) partner’s cooperative and opportunistic behaviour, from the perspective of transaction cost economics.Design/methodology/approachItem measurements, based on which the questionnaire was developed, were derived according to a thorough search and review of related literature. In all, 226 valid responses from manufacturing enterprises in China were collected. A structural equation modelling approach was used to analyse the data and examine the fitness of the proposed model.FindingsThis study shows that partner selection cost, specific asset investment and extorting rent cost are positively related to a JV partner’s cooperative behaviour. Specific asset investment exerts the most significant influence on partner’s cooperative behaviour. The results also reveal that partner’s opportunistic behaviour is not significantly affected by specific asset investment but is negatively influenced by extorting rent cost. Both partner selection cost and extorting rent cost show positive impacts on specific asset investment.Research limitations/implicationsThe investigation focused on only manufacturing enterprises in one country. Future research could be directed to investigating other countries to increase the generalizability of the findings.Practical implicationsThe findings suggest that increasing the extorting rent cost to promote the probability of specific asset investment is a core element to enhance JV partner cooperation.Originality/valueThe study not only empirically investigates the relative importance of classic transaction cost-related factors on JV partner opportunism and cooperation, but also enables a deeper understanding of the interrelationship among the classic transaction cost-related factors and their influences on partner cooperation and opportunism.
Factors influencing the quality of life among Indonesian elderly
Authors: Pramesona Bayu Anggileo , Taneepanichskul Surasak 
Published: October 2018

Purpose
In spite of being a significant public health concern, quality of life (QoL) amongst elderly in nursing home (NH) settings is rarely analyzed. The purpose of this paper is to examine the level of QoL and factors influencing QoL amongst elderly NH residents in Indonesia.

Design/methodology/approach
A survey was conducted amongst 181 elderly at three NHs in three districts in Yogyakarta province, Indonesia. Purposive sampling was used for the study site and sample collection. Face-to-face interviews were performed using the WHO Quality of Life BREF Indonesian version questionnaire to assess elderly QoL. Multivariate linear regression was performed to determine the factors influencing the QoL amongst elderly NH residents.

Findings
The response rate was 66.3 percent. A total of 64.1 percent of elderly had a fair level of QoL, whereas 16.6 percent still had a poor level of QoL. A total of 86.7 percent of elderly lived in an NH due to compulsion, and more than half (53.6 percent) perceived inadequacy of care. The QoL was significantly low amongst those who live in NHs due to compulsion, no social support resources, not receiving any kind of support, having three chronic diseases and perceived inadequacy of care (p<0.05). Multivariate analysis revealed that perceived adequacy of care reasons for living in NH was associated with QoL (p<0.001).

Originality/value
Perceived adequacy of care and reason for living in an NH were highlighted as predictors of QoL amongst elderly NH residents. Improving adequate healthcare services and developing treatment strategies to enforce the adaptation process is required in order to maintain the QoL in elderly NH residents.
A Bi-objective Covering Location Problem
Authors: El Itani Bilal , Ben Abdelaziz Fouad , Masri Hatem 
Published: October 2018

PurposeAmbulance response time is an important factor in saving lives and is highly linked with the ambulance location problem. The Maximum Expected Covering Location Problem (MEXCLP), introduced by Daskin (1983), is one of the most used ambulance location models that maximize the probability of stratifying demands for emergency medical service (EMS) centers. Due to huge increase in the operational costs of EMS centers, ambulance location models must consider the cost of coverage and the opportunity to use other companies’ private ambulances to answer emergency calls. The paper aims to discuss these issues.Design/methodology/approachIn this paper, the authors propose to extend the MEXCLP to a bi-objective optimization problem where the cost of satisfying emergency calls is minimized.FindingsThe proposed model is tested using data retrieved from the Lebanese Red Cross (LRC) in Beirut capital of Lebanon. The reported findings show significant enhancements in the results where the LRC can fully satisfy the perceived demands from all areas in Beirut within 9 min with an affordable cost.Originality/valueThe model is a first attempt to reduce operational costs of EMS centers while constraining the response time to satisfy emergency calls at an acceptable rate.
Intangibles and performance in oil and gas industry
Authors: Dženopoljac Vladimir , Muhammed Shahnawaz , Janošević Stevo 
Published: October 2018

Purpose
The purpose of this paper is to assess the extent to which financial and market performance of companies in the oil and gas sector can be attributed to the value of their intangibles.

Design/methodology/approach
The research utilized publicly available data on global oil and gas companies from 2000 to 2015. Panel data analysis was used to assess the relationship between intangibles (measured by Calculated Intangible Value (CIV)) and financial and market performance of these companies.

Findings
Results show that intangibles had a significant impact on firm performance in multiple financial measures. Firms’ intangibles also influence their market capitalization, indicating that the financial markets discount such information in their pricing.

Research limitations/implications
Although the impact of intangibles on corporate performance is found to be significant, the size of that impact is small, suggesting that significant increase in the size of intangibles would only lead to a modest increase in corporate performance. Additionally, the research sample was limited to the top oil and gas firms listed in the Fortune 2000 global list and limits the generalization of the findings. Despite these limitations, the research provides greater confidence in using CIV to assess intangibles in organizations.

Practical implications
This research highlights the importance and ways of measurement of intangibles for managers in oil and gas companies and its significance for their firms’ performance.

Originality/value
The paper fills the gap in the literature in the assessment of intangibles in the oil and gas sector, as well as in the assessment of using CIV to measure the impact of intangibles on company performance.
Coordination, control, or charade? The role of board interlocks among business group members
Authors: Zona Fabio , Boyd Brian Keane , Takacs Haynes Katalin 
Published: October 2018

PurposeHow do business groups manage their internal processes? The purpose of this paper is to explore how board interlocks between members serve as control and coordination mechanisms within business groups. The authors propose that centrality of groups’ affiliates in the group network of interlocking directorates is shaped by agency and resource dependence forces. In particular, the authors examine the role of international board ties as a resource and information conduit.Design/methodology/approachThis study leverages proprietary information on firm-to-firm transaction ties among all 155 affiliates belonging to a large Italian business group. The authors use network analysis to develop multiple measures of the centrality of each group member, and link these to resource transactions, ownership patterns and geographic distributions. The authors test the hypotheses in a structural equation model using LISREL.FindingsThe results demonstrate that both resource exchanges and the presence of cross-national relations increase an affiliate’s central position in the group’s network of board ties. In contrast, ownership ties between members were unrelated to affiliate centrality.Originality/valueInternal governance mechanisms of business groups are rarely studied. While groups are often portrayed as inefficient or value-destroying, the analysis of proprietary firm data suggests a very different scenario: inter-unit ties are much more supportive of a model of business groups as strategic portfolios, using internal ties to share information and resources.
Continuous linear multistep method for the general solution of first order initial value problems for Volterra integro-differential equations
Authors: Kamoh Nathaniel Mahwash , Aboiyar Terhemen 
Published: October 2018

Purpose
The purpose of this paper is to develop a block method of order five for the general solution of the first-order initial value problems for Volterra integro-differential equations (VIDEs).

Design/methodology/approach
A collocation approximation method is adopted using the shifted Legendre polynomial as the basis function, and the developed method is applied as simultaneous integrators on the first-order VIDEs.

Findings
The new block method possessed the desirable feature of the Runge–Kutta method of being self-starting, hence eliminating the use of predictors.

Originality/value
In this paper, some information about solving VIDEs is provided. The authors have presented and illustrated the collocation approximation method using the shifted Legendre polynomial as the basis function to investigate solving an initial value problem in the class of VIDEs, which are very difficult, if not impossible, to solve analytically. With the block approach, the non-self-starting nature associated with the predictor corrector method has been eliminated. Unlike the approach in the predictor corrector method where additional equations are supplied from a different formulation, all the additional equations are from the same continuous formulation which shows the beauty of the method. However, the absolute stability region showed that the method is A-stable, and the application of this method to practical problems revealed that the method is more accurate than earlier methods.
The British financial revolution and the empire of credit in St. Kitts and Nevis, 1706–21*
Authors: Graham Aaron 
Published: October 2018

Abstract
The British ‘financial revolution’ was a colonial as well as a metropolitan phenomenon. Yet the structures used by colonists to participate in it have rarely been studied in their own right. A close examination of the islands of St. Kitts and Nevis, which received almost £100,000 in government debentures between 1706 and 1721, confirms that they used the same types of networks and agents as their counterparts in Britain and Ireland to overcome the problems of distance and to manage their investments. In functional terms, the new ‘empire of credit’ was therefore merely an extension of the British financial revolution.