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The main purpose of this study resides essentially in the development of a new tool to quantify the biomass in the bioreactor operating under steady state conditions.

Modeling is the most relevant tool for understanding the functioning of some complex processes such as biological wastewater treatment. A steady state model equation of activated sludge model 1 (ASM1) was developed, especially for autotrophic biomass (XBA) and for oxygen uptake rate (OUR). Furthermore, a respirometric measurement, under steady state and endogenous conditions, was used as a new tool for quantifying the viable biomass concentration in the bioreactor.

The developed steady state equations simplified the sensitivity analysis and allowed the autotrophic biomass (XBA) quantification. Indeed, the XBA concentration was approximately 212 mg COD/L and 454 mgCOD/L for SRT, equal to 20 and 40 d, respectively. Under the steady state condition, monitoring of endogenous OUR permitted biomass quantification in the bioreactor. Comparing XBA obtained by the steady state equation and respirometric tool indicated a percentage deviation of about 3 to 13%. Modeling bioreactor using GPS-X showed an excellent agreement between simulation and experimental measurements concerning the XBA evolution.

These results confirmed the importance of respirometric measurements as a simple and available tool for quantifying biomass.

The purpose of this study is to investigate cathodic protection (CP) efficiency in the tidal zone and its associated processes.

Specific features of CP in the tidal zone, that is, persistence of a thin seawater film and insufficient cathodic potential due to ohmic drop, were addressed. In this preliminary study, carbon steel electrodes were polarized at two cathodic potentials (correct or insufficient protection) while immersed in 1 mm or 5 mm thick natural seawater layers. After CP interruption, the protective ability of the layers covering the steel electrodes was studied using various electrochemical methods, including electrochemical impedance spectroscopy. The layers were characterized by XRD.

The protective ability of calcareous deposits was increased in thin seawater films. Insufficient CP could promote protective aragonite/corrosion products layer.

The combined effects of thin seawater film and applied potential were never addressed, and the conclusions drawn from this preliminary study give new insight on the efficiency of CP in the tidal zone.

The purpose of this paper is to analyse the role of informal help at the workplace and identify its determinants and outcomes. With an agency model, a multidisciplinary framework is proposed to understand how the “managerial” logic that shapes formal communication combines with the social logic underlying informal help in the context of organisational changes.

With a sample of 12,475 employees of the French private sector, switching models estimate the determinants and impacts of informal help on wages and effort.

The results of this paper show that informal help networks reproduce discriminatory stereotypes, and they are driven by the firm’s instability, organisational design of workstation and social mechanisms. When employees help other workers, they intensify their effort. It pays to be helped, as recipients of help receive a wage premium. Results also suggest the existence of free-riding behaviours in informal help when workers do not reciprocate help

This approach of work organisation focuses on the analysis of productive interdependencies and social interactions at the workplace. The link between the formal organisation and the informal social structure is analysed with the concept of informal help. It also highlights the social dimension of performance.

Scholars have recognized that formal hierarchical structures and slack resources are at the core of small- and medium-sized enterprises (SMEs) attainment of ambidexterity. Surprisingly, few studies on SMEs have analyzed the extent to which these structural and resource attributes are associated with exploration and exploitation. This study aims to examine how two structural attributes, formalization and structural empowerment, and two resource attributes, financial slack and human resource slack, affect exploration and exploitation in SMEs.

Data were gathered from a survey administered to the chief executive officers of 522 French SMEs. The research hypotheses were then tested using seemingly unrelated regressions to investigate the contrasts between the two components of ambidexterity.

The results show that structural empowerment and financial slack may be conducive to exploration and exploitation at the same time. By contrast, formalization and human resource slack impact only one of these two ambidexterity components in significant ways: the former may be a powerful lever for exploitation, while the latter may be a powerful lever for exploration.

Relying on a dual structure–resource perspective, this study allows us to discuss the distinct impacts that several organizational antecedents have on exploration and exploitation in the specific context of SMEs. It thus addresses the recent call to identify which antecedents are integrating and which are differentiating to help firms deal with ambidexterity.

This paper aims to study the dimensions and subdimensions of humanitarian supply chain resilience through the case of an non-governmental organization (NGO) logistics organization facing the international COVID-19 pandemic.

The methodology of this empirical research paper is based on a qualitative study using semistructured interviews with key actors of the Médecins Sans Frontières Logistique (MSF Log), NGO during the COVID-19 crisis in 2020 and 2021.

The data analysis highlighted four main dimensions of humanitarian supply chain resilience: organizational capacity, collaboration, flexibility and humanitarian culture. The transversal importance of the information system and that of the humanitarian culture were also pointed out. Furthermore, the authors have identified the subdimensions of each dimension; these subdimensions further elaborate the main dimension and provide a more detailed understanding of the concept. These dimensions require both proactive and reactive actions to be effective. Finally, based on these empirical results, a conceptual model of humanitarian supply chain resilience is proposed.

Additionally, further research can be done to explore the impact of digital technologies on the humanitarian supply chain resilience and how these technologies can be used to improve the resilience of humanitarian supply chains. Additionally, future research can also be conducted to explore how to measure the resilience of humanitarian supply chains and how to develop methods to improve the resilience of these supply chains.

The dimensions and subdimensions of resilience that have been highlighted may provide a guide for managers to target their actions, both responsively and proactively, to act on resilience over time when facing a crisis such as an international pandemic.

The value of this research is linked to the findings that result not only from literature about resilience but are also founded on an empirical and qualitative study of an NGO logistics organization facing an international crisis. The research provides an in-depth understanding of the practical application of supply chain resilience in a humanitarian context and the specific challenges and opportunities that arose during the COVID-19 pandemic for MSF Log. It also highlights the importance of information systems and humanitarian culture in maintaining the supply chain resilience. The findings of this research can be used as a guide for other humanitarian organizations to improve their supply chain resilience in times of crisis.

As a way to enable employees to work distantly, teleworking has gained a growing interest in companies. At the same time, management challenges regarding the teleworkers’ risk of isolation, coupled with the need to maintain cohesion for the dispersed team, to give an example, are various. How can management practices help to maintain adequate levels of perceived proximity for a dispersed team’s members? The purpose of this paper is to answer this question. Referring to a particular person’s perception of how close or how far another person is, the concept of perceived proximity is mobilized. This Telecom case study is based on 22 interviews with human resources directors, managers and teleworkers. While the results of this study appear to corroborate empirically the theoretical model as proposed by O’Leary et al. (2014), they also propose nuances, highlighting the importance of the interpersonal relationship to expand the perceived proximity and stressing the need for both distant and face-to-face exchanges. They also help to understand which management practices can influence perceived proximity. In particular, they help to understand the role of communication and collective identity and support the importance of the e-leader. Finally, the results highlight two remote management modes that will be discussed elaborately.

The authors conducted a single in-depth case study of Telecom as a unique case study; it is useful to analyze new and complex phenomena for which theoretical development is emerging and the consideration of the context is essential (Yin, 2013). In total, 22 interviews were conducted with the human resources directors, managers and teleworkers. Lasting between 40 and 130 min each, the interviews were all fully transcribed and analyzed using an iterative thematic content analysis. The authors first manually analyzed the data on the basis of the social regulation theory to interpret the local and the combined regulation (that is say to how the managers and the teleworkers co-build the rules to work being distant) the telework implied between managers, teleworkers and their co-workers (Authors, 2018). Two emerging codes led the authors to reinterpret the data, compared to the initial interpretative framework. The authors thus transformed the coding and recoded the 22 interviews (Bacharach et al., 2000, p. 713; cited by Gibbert et al. 2010, p. 58) around the objective/subjective working time and information and communication technology (ICT) use and the perceived proximity: shared identity and perceived proximity, and communication and perceived proximity.

First, the level of ICT use and the accompanying objective and subjective perceptions with regard to working time are reported and positive perceptions for the employees are determined because of the timing flexibility the ICT determines. Second, the ICT use is presented in relation to the managerial and collegial proximity perceived. Third, the authors discuss the shared identity processes that influence the proximity perceived, followed by the characteristics of the communication process, being the fourth one. As such, the results lead to a valuable input that enables to critically reflect on the e-leader roles, resulting in two emerging management modes seen as a continuum in terms of shared identity: the “e-communicational” mode signals the re-foundation of management in situations of distance based on the personality of the e-leader that influences the team members in terms of communicational and organizational behaviors; and the control management mode that is based upon objectives in a situation of being distant, illustrated by managers who regulate the work made by the distant team in monitoring the objectives without sharing the experience of telework.

The results corroborate empirically with the theoretical model by Boyer O’Leary et al. (2014), while putting into perspective the complexity to manage the inter-subjectivity that is related to distance. More specifically, the results show that even if the ICT use leads to a new balance regarding time management for teleworkers – increasing their quality of life perceptions, with a better organizational flexibility – that is to say, a “win-win” configuration, the ultimate success of such a configuration depends on sound management practices. In this sense, the authors propose to enrich their model (Figure 3, p. 33). More extensive research will test two new moderating variables. At first, the results put in evidence the core role of e-management (e-communicational vs control), with a potential moderator effect on the relationship between objective distance and shared identification, on the one hand, and communication, on the other hand. Another result is the potential moderator effect of the ICT use on the relationship between perceived proximity and relationship quality. The nuances proposed support some recent studies arguing that distant communication (versus face-to-face) may inhibit geographically distributed team performance without consideration of the way the teams use ICT to ensure their cohesion and performance (Malhotra and Majchrzak, 2014).

These conclusions result into important management recommendations to support dispersed teams with how to cope with challenges such as the risk of delayed communication, possible misinterpretations, limited information richness and great conflicts (Zuofa and Ochieng, 2017).

Compared to the unique empirical application of the Boyer O’Leary et al.’s framework (2014), who found no differences existing in terms of proximity perceived with the study of 341 “geographically present” dyads with 341 “geographically distant,” this study’s results show that the construction of the feeling of proximity depends on a fragile balance between virtual and face-to-face exchanges. The authors also highlight the role of an e-leader in this regard and identify and compare two modes of remote management.

Big data analytics (BDA) increasingly provide value to firms for robust decision making and solving business problems. The purpose of this paper is to explore information quality dynamics in big data environment linking business value, user satisfaction and firm performance.

Drawing on the appraisal-emotional response-coping framework, the authors propose a theory on information quality dynamics that helps in achieving business value, user satisfaction and firm performance with big data strategy and implementation. Information quality from BDA is conceptualized as the antecedent to the emotional response (e.g. value and satisfaction) and coping (performance). Proposed information quality dynamics are tested using data collected from 302 business analysts across various organizations in France and the USA.

The findings suggest that information quality in BDA reflects four significant dimensions: completeness, currency, format and accuracy. The overall information quality has significant, positive impact on firm performance which is mediated by business value (e.g. transactional, strategic and transformational) and user satisfaction.

On the one hand, this paper shows how to operationalize information quality, business value, satisfaction and firm performance in BDA using PLS-SEM. On the other hand, it proposes an REBUS-PLS algorithm to automatically detect three groups of users sharing the same behaviors when determining the information quality perceptions of BDA.

The study offers a set of determinants for information quality and business value in BDA projects, in order to support managers in their decision to enhance user satisfaction and firm performance.

The paper extends big data literature by offering an appraisal-emotional response-coping framework that is well fitted for information quality modeling on firm performance. The methodological novelty lies in embracing REBUS-PLS to handle unobserved heterogeneity in the sample.

This paper aims to contribute to the area of museum experience research, by exploring how consumers build stories to tell different experiences generated from a visit to a museum and by viewing these inductive findings in the light of recent research on consumption experiences (Lanier and Rader, 2015).

A qualitative study is conducted. Twenty-three narratives were analysed relating a visit to ZKM museum in Karlsruhe (Germany) using narrative analysis techniques, as they are suitable to capture sensations, emotions and feelings.

ZKM museum emerges from the analysis of the narratives as a cradle for stochastic experiences (Lanier and Rader, 2015). The narratives develop several episodes that correspond to performance and liberatory experiences. A reconceptualization of the museal experience is proposed as a mesh of performance, stochastic or liberatory episodes, that capture the subject’s perspective.

The study was limited to students who were 19-23 years of age and to one museum. Future research should include a wider age group and other museums.

The findings provide useful insights for curators, educators and exhibit designers staging museal experiences.

The findings provide a better understanding of different experiences occurring in the same experiential context and their meaning from the subject’s perspective.

Lanier and Rader (2015) typology has not yet been tested in a museal context. The findings suggest that the same context can generate a set of various episodes (performance, liberatory, stochastic) within a given experience. From a methodological perspective, the results show that qualitative approaches are relevant to segment the museal offer based on sought experiences.