bluuebunny/crossref_metadata_2025_split huggingface dataset:
Deep reinforcement learning-based attitude motion control for humanoid robots with stability constraints
Authors: Shi Qun , Ying Wangda , Lv Lei , Xie Jiajun 
Published: April 2020

Purpose
This paper aims to present an intelligent motion attitude control algorithm, which is used to solve the poor precision problems of motion-manipulation control and the problems of motion balance of humanoid robots. Aiming at the problems of a few physical training samples and low efficiency, this paper proposes an offline pre-training of the attitude controller using the identification model as a priori knowledge of online training in the real physical environment.

Design/methodology/approach
The deep reinforcement learning (DRL) of continuous motion and continuous state space is applied to motion attitude control of humanoid robots and the robot motion intelligent attitude controller is constructed. Combined with the stability analysis of the training process and control process, the stability constraints of the training process and control process are established and the correctness of the constraints is demonstrated in the experiment.

Findings
Comparing with the proportion integration differentiation (PID) controller, PID + MPC controller and MPC + DOB controller in the humanoid robots environment transition walking experiment, the standard deviation of the tracking error of robots’ upper body pitch attitude trajectory under the control of the intelligent attitude controller is reduced by 60.37 per cent, 44.17 per cent and 26.58 per cent.

Originality/value
Using an intelligent motion attitude control algorithm to deal with the strong coupling nonlinear problem in biped robots walking can simplify the control process. The offline pre-training of the attitude controller using the identification model as a priori knowledge of online training in the real physical environment makes up the problems of a few physical training samples and low efficiency. The result of using the theory described in this paper shows the performance of the motion-manipulation control precision and motion balance of humanoid robots and provides some inspiration for the application of using DRL in biped robots walking attitude control.
Socioeconomic determinants of property crime offending in Ethiopia:
Authors: Wassie Nigatu , Melese Bekele , Eyasu Nahom 
Published: April 2020

Purpose
The purpose of this study is to investigate the socioeconomic determinants of property crimes on convicted offenders in the Chilga district correctional institution (CDCI).

Design/methodology/approach
This study conducted a socioeconomic determinant of property crimes on convicted offenders using quantitative research. Respondents consisted of a random sample of 170 convicted offenders in CDCI. This study used descriptive statistics, logistic regression and Pearson correlations for analyzing the quantitative data in CDCI.

Findings
The results of the study showed that the age at first engagement, educational status, offender’s immediate economic situation and previous experience of the offender were the perceived reasons in one’s major property crime offending. However, average monthly income, peer effect and family structure (grown up with) were found to be non-perceived reasons. Youths who are unmarried, illiterate and unemployed offenders had over three times more probabilities of committing theft than robbery and burglary in the winter season, especially in February, because of the determinants of illiteracy and unemployment such as negligence for the future life. Furthermore, the convicted offenders who were illiterate, unemployed and raised by single parents have engaged in theft for the first time, but burglary and robbery by employed and literate offenders in more probable.

Originality/value
This paper takes a fresh perspective on knowledge about property crime and economic as well as criminological theories using various bodies of academic research. This paper’s insight will be helpful to fill the literature gaps; there are lot research studies with little investigations addressing to the issue of the determinants of property crime. It will also be useful for policymakers to mitigate the determinant of property crime.
The impact of the implementation of management system on the perception of role and tasks of maintenance services and effectiveness of their functioning
Authors: Drożyner Przemysław 
Published: April 2020

PurposeThe first goal of the article was to examine how the perception of the role and scope of operation of maintenance services in the enterprise changes, depending on whether the company has an integrated management system (IMS), only a quality management system implemented in accordance with ISO 9001 and in the absence of a formal, certified management system. The second goal was to propose a model for assessing the quality of maintenance service functioning in enterprise with IMS implemented.Design/methodology/approachThe author's experience of over 1,000 audits in enterprises in various industries: food, automotive, construction, petrochemical, electronic and so on was used in the work. The audits were carried out in three types of companies: which had IMSs (800 audits), which only had a system implementation certificate ISO 9001 (140 audits) and without any standardized management system implemented (so-called second-party audits, commissioned by the client of the audited company.FindingsThe most important conclusion is – the role of UR services in enterprises with the implemented IMS is much broader and goes beyond the classic framework for planning, implementation and settlement of maintenance and repair work. Maintenance is understood more broadly and includes in its scope also the safety of people and the environment, the efficiency of production and consumption of utilities as well as the quality of products and services. Maintenance issues include not only strictly technical aspects but also economic, logistic, legal and organizational and management aspects.Practical implicationsResearch shows that enterprises, especially those with high technical and organizational culture, should not treat management systems as costs, but as a driving force for the implementation of new technologies, new organizational solutions and the development of employees' competences.Social implicationsBroad views on stakeholders of maintenance services (including employees, their families, control institutions) and their requirements make enterprises begin to see the need to maintain the so-called lifetime balance, as well as the safety and comfort of work of employees of these services.Originality/valueThe author did not find in literature any reports on studies of the impact of formal, certified management systems on the quality of maintenance services; this article shows that this impact is large and, above all, positive; with such a broad understanding of the role of maintenance, there is a need to develop a common platform for such seemingly distant concepts as machine technical condition or fatigue life versus cost accounting and quality management.
Mathematics and STEM teacher development for flipped education
Authors: Weinhandl Robert , Lavicza Zsolt , Houghton Tony 
Published: April 2020

PurposeFlipped classroom approaches (FCA) are an educational innovation that could increase students' learning outcomes in, and their enjoyment of, mathematics or STEM education. To integrate FCA into education sustainably, professional teacher development (PTD) is a promising tool. The research aim is to explore which aspects should be considered when developing and implementing professional mathematics or STEM teacher development for flipped approaches.Design/methodology/approachA total of 20 expert interviews were conducted and analysed according to a synthesis of grounded theory approaches and qualitative interview study principles.FindingsEvaluating the interview data indicates that the characteristics of different teacher types in PTD, learning activities in PTD and the DSE model derived in this study could be vital elements in professional mathematics or STEM teacher development for flipped approaches.Originality/valueEvaluating the interview data indicates that the characteristics of different teacher types in PTD, learning activities in PTD and the DSE model derived in this study could be vital elements in professional mathematics or STEM teacher development for flipped approaches.
Beyond smart tourism cities – towards a new generation of “wise” tourism destinations
Authors: Coca-Stefaniak J. Andres 
Published: April 2020

Purpose
The purpose of this trends paper is to offer insights into the technological changes affecting our cities and urban tourism destinations, and to explore avenues for further research and practice in the context of smart tourism destinations.

Design/methodology/approach
The literature on smart cities and smart tourism destinations is analysed in view of delivering a research agenda for a new generation of “post-smart” tourism destinations, beyond existing paradigms in this field.

Findings
Smart tourism research to date is found to be lacking in terms of addressing emerging (“post-smart”) social issues increasingly faced by global tourism cities, such as growing inequalities between host communities and visitors, wellness (e.g. slow tourism and slow cities) and resilience and mental health (e.g. digital detox), among others.

Practical implications
A post-smart approach to tourism city management and marketing calls for rethinking of existing tourism and urban policies that address wider sustainability issues exemplified by the urban transitions debate as well as adopting a more holistic networked approach to smartness involving entire regions. This also calls for the development of a new research agenda in urban tourism through a new prism – the post-smart “wise” tourism destination.

Originality/value
A new tourism futures construct – the “wise” tourism destination – is posited. This is done within the context of a new (“post-smart”) generation of tourism cities. It is argued that “wise” tourism cities will require novel attributes and adopt a visionary strategic positioning well beyond today’s smart tourism destination paradigms. Additionally, a tentative research agenda for “wise” tourism cities is discussed.
Microdivisionalization as a way toward dynamic capability
Authors: Chen Roger (Rongxin) , Wang Liang , Li Eric Ping Hung , Hu Guodong 
Published: April 2020

PurposeAs entrepreneurial top management teams in multidivisional forms are typically treated in pertinent literature as the default organizational solutions for developing dynamic capabilities, the emerging innovative organizational forms tend to be overlooked, even though they could be a viable means of transforming established enterprises. The present case study examines how Haier's microenterprise and platforms influenced the firm's dynamic capabilities development.Design/methodology/approachThe paper presents a qualitative case study of Haier Group Corporation in China.FindingsThe findings indicate that Haier employed a loosely coupled relationship between its headquarters and the microenterprises, developed quasi market-based exchange relationships and established peer-to-peer learning opportunities and coordination among its microenterprises. Data analyses further revealed that Haier has adopted three-step routines to capture market opportunities and enhance operational efficiency. This research extends the sensing-seizing-reconfiguration model typically recommended in the existing literature. It also demonstrates that organizational configuration is an important aspect of dynamic innovation. In summary, the study results showcase microdivisionalization as a new way for developing dynamic capabilities to better adapt to the ever-changing market environments.Originality/valueIn summary, our study showcased microdivisionalization as a new way for firms to change the organization structure and business strategies to better adapt to the ever-changing market environments.
Employer image, corporate image and organizational attractiveness: the moderating role of social identity consciousness
Authors: Younis Raghda Abulsaoud Ahmed , Hammad Rasha 
Published: April 2020

PurposeAlthough researchers agreed that corporate image and employer image are important factors affecting organizational attractiveness, understanding the role of social identity within the attracting process, in addition to exploring the relationship between corporate image and employer image, is still a research gap. Therefore, this study aims to investigate the effect of corporate and employer image on organizational attractiveness in addition to understanding the moderating role of social identity on the relationship between corporate image and employer brand and organizational attractiveness.Design/methodology/approachThe study used a survey method for data collection from fourth year students.FindingsThe findings show that both employer image and corporate image have a significant positive effect on organizational attractiveness . In addition, it has showed that social identity consciousness plays partial role as a moderator in the model.Originality/valueThis paper is one of the first papers that include corporate image, employer image, social identity consciousness and organizational attractiveness in the same model . In addition, it is one of the limited papers that considered both signal and social identity theory in attraction process.
Contrasting floral biology of Artabotrys species (Annonaceae): Implications for the evolution of pollinator trapping
Authors: Chen Junhao , Liu Ming‐Fai , Saunders Richard M. K. 
Published: April 2020

AbstractArtabotrys comprises a species‐poor early divergent grade (EDG) and a main species‐rich clade (“main Artabotrys clade,” MAC). All members of the MAC exhibit a remarkably well‐conserved floral Bauplan characterized by a tightly enclosed floral chamber with an elaborate rim between the inner petal blade and claw. Conversely, EDG resembles the sister genus Xylopia in lacking the inner petal rim, with one species (Artabotrys brachypetalus) bearing petals that lack the distinction between blade and claw altogether. The floral phenology and pollination ecology of two exemplar species—Artabotrys brachypetalus from the EDG and Artabotrys blumei from the MAC—are compared, including assessment of effective pollinators and their activity patterns, scent chemistry and thermogenesis. Our study revealed that Artabotrys blumei exhibits abbreviated anthesis (c. 27 hr), with a floral phenology and morphology that are clearly consistent with pollinator trapping, and may be pollinated by small beetles. Artabotrys brachypetalus has a typical anthetic duration (c. 45 hr), lacks a pollinator trapping mechanism, and is pollinated by honey bees and curculionid beetles. The “xylopioid” traits of the EDG are likely to be plesiomorphic, whereas the tightly enclosed floral chamber is likely to be apomorphic for the MAC and functionally significant in trapping pollinators.
Walking in Jozi: Guided Tours, Insecurity and Urban Regeneration in Inner City Johannesburg
Authors: Opfermann Lena S. 
Published: April 2020

AbstractThis article explores how the emerging tourism sector in Johannesburg is intertwined with current processes of urban regeneration and development. Using walking tours as a case study, I illustrate how tour operators navigate insecure urban spaces and contribute to their (re‐)development by performing (in)security, by offering ‘authentic’ experiences and by actively engaging in social and economic activities. I argue that walking tours promote a particular kind of urban development that aims to appeal to a new urban middle class and is in line with the vision pursued by big private investors and new urban entrepreneurs. Similar to other global gentrification processes, this vision draws on Western notions of hip urban lifestyles and aesthetics in order to foster an image of the city as pan‐African and cool. While making new spaces accessible, this approach to urban development also affects and threatens other inner city users, including African migrants living or working in precarious conditions. I contend that these side effects of the currently promoted urban regeneration have so far been overlooked. In order to create a social and sustainable urban development that supersedes apartheid‐era spatial segregation, these effects should be taken into account by the tourism sector, by private investors and policy makers alike.
Adaptive niche‐based sampling to improve ability to find rare and elusive species: Simulations and field tests
Authors: Chiffard Jules , Marciau Coline , Yoccoz Nigel Gilles , Mouillot Florent , Duchateau Stéphane , Nadeau Iris , Fontanilles Philippe , Besnard Aurélien 
Published: April 2020

Abstract

Sampling efficiency is crucial to overcome the data crisis in biodiversity and to understand what drives the distribution of rare species.

Adaptive niche‐based sampling (ANBS) is an iterative sampling strategy that relies on the predictions of species distribution models (SDMs). By predicting highly suitable areas to guide prospection, ANBS could improve the efficiency of sampling effort in terms of finding new locations for rare species. Its iterative quality could potentially mitigate the effect of small and initially biased samples on SDMs.

In this study, we compared ANBS with random sampling by assessing the gain in terms of new locations found per unit of effort. The comparison was based on both simulations and two field surveys of mountain birds.

We found an increasing probability of contacting the species through iterations if the focal species showed specialization in the environmental gradients used for modelling. We also identified a gain when using pseudo‐absences during first iterations, and a general tendency of ANBS to increase the omission rate in the spatial prediction of the species' niche or habitat.

Overall, ANBS is an effective and flexible strategy that can contribute to a better understanding of distribution drivers in rare species.
A Pilot Randomized Controlled Trial of the PTSD Coach App Following Motor Vehicle Crash–related Injury
Authors: Pacella‐LaBarbara Maria L. , Suffoletto Brian P. , Kuhn Eric , Germain Anne , Jaramillo Stephany , Repine Melissa , Callaway Clifton W. 
Published: April 2020

AbstractObjectivePosttraumatic stress disorder (PTSD) symptoms (PTSS) are common after minor injuries and can impair recovery. We sought to understand whether an evidence‐based mobile phone application with self‐help tools (PTSD Coach) could be useful to improve recovery after acute trauma among injured emergency department (ED) patients. This pilot study examined the feasibility, acceptability, and potential benefit of using PTSD Coach among acutely injured motor vehicle crash (MVC) patients.MethodsFrom September 2017 to September 2018, we recruited adult patients within 24 hours post‐MVC from the EDs of two Level I trauma centers in the United States. We randomly assigned 64 injured adults to either the PTSD Coach (n = 33) or treatment as usual (TAU; n = 31) condition. We assessed PTSS and associated symptoms at 1 month (83% retained) and 3 months (73% retained) postenrollment.ResultsEnrollment was feasible (74% of eligible subjects participated) but usability and engagement were low (67% used PTSD Coach at least once, primarily in week 1); 76% of those who used it rated the app as moderately to extremely helpful. No differences emerged between groups in PTSS outcomes. Exploratory analyses among black subjects (n = 21) indicated that those in the PTSD Coach condition (vs. TAU) reported marginally lower PTSS (95% CI = −0.30 to 37.77) and higher PTSS coping self‐efficacy (95% CI = −58.20 to −3.61) at 3 months.ConclusionsWe demonstrated feasibility to recruit acutely injured ED patients into an app‐based intervention study, yet mixed evidence emerged for the usability and benefit of PTSD Coach. Most patients used the app once and rated it favorably in regard to satisfaction with and helpfulness, but longitudinal engagement was low. This latter finding may explain the lack of overall effects on PTSS. Additional research is warranted regarding whether targeting more symptomatic patients and the addition of engagement and support features can improve efficacy.
Cognitive and emotional empathy in individuals at clinical high risk of psychosis
Authors: Montag C. , Brandt L. , Lehmann A. , De Millas W. , Falkai P. , Gaebel W. , Hasan A. , Hellmich M. , Janssen B. , Juckel G. , Karow A. , Klosterkötter J. , Lambert M. , Maier W. , Müller H. , Pützfeld V. , Schneider F. , Stützer H. , Wobrock T. , Vernaleken I. B. , Wagner M. , Heinz A. , Bechdolf A. , Gallinat J. 
Published: April 2020

BackgroundImpairments of social cognition are considered core features of schizophrenia and are established predictors of social functioning. However, affective aspects of social cognition including empathy have far less been studied than its cognitive dimensions. The role of empathy in the development of schizophrenia remains largely elusive.MethodsEmotional and cognitive empathy were investigated in large sample of 120 individuals at Clinical High Risk of Psychosis (CHR‐P) and compared with 50 patients with schizophrenia and 50 healthy controls. A behavioral empathy assessment, the Multifaceted Empathy Test, was implemented, and associations of empathy with cognition, social functioning, and symptoms were determined.ResultsOur findings demonstrated significant reductions of emotional empathy in individuals at CHR‐P, while cognitive empathy appeared intact. Only individuals with schizophrenia showed significantly reduced scores of cognitive empathy compared to healthy controls and individuals at CHR‐P. Individuals at CHR‐P were characterized by significantly lower scores of emotional empathy and unspecific arousal for both positive and negative affective valences compared to matched healthy controls and patients with schizophrenia. Results also indicated a correlation of lower scores of emotional empathy and arousal with higher scores of prodromal symptoms.ConclusionFindings suggest that the tendency to ‘feel with’ an interaction partner is reduced in individuals at CHR‐P. Altered emotional reactivity may represent an additional, early vulnerability marker, even if cognitive mentalizing is grossly unimpaired in the prodromal stage. Different mechanisms might contribute to reductions of cognitive and emotional empathy in different stages of non‐affective psychotic disorders and should be further explored.