Organizational choices and occupational health and safety risks prevention. An interpretation of Italian regulations

The social and economic costs of risks produced by organizations are becoming more and more evident and relevant. Enterprises are expected (and, sometimes, obliged) to become able to efficiently manage the risks they induce: industrial hazards, financial uncertainty, environmental risks, risk to safety and health in the workplace, etc. By adopting an organizational perspective, this contribution investigates the approaches to Occupational Health and Safety risks prevention that are promoted by the law (specifically, by Italian law). The goal of this paper is then to discuss the consistency of the norms with respect to the objectives of risks prevention and to understand their actual and potential impact on business practices

Tensions in SMEs’ network for sustainable entrepreneurship

Purpose. The study analyses how organisational actors overcome internal network problems and implement solutions in SMEs’ network contracts focused on sustainability objectives to leverage networking value. Design/methodology/approach. The study uses a qualitative approach to investigate possible tensions emerging in a business network with sustainability goals. Seven case studies of network contracts were analysed using the interpretative model by Tunisini and Marchiori (2020), which consists of five variables: Individual, Structural, Legitimacy, Interactions, and Governance. Findings. The research has effectively recognised different challenges and shared methods entrepreneurs often face to overcome these critical issues. The knowledge acquired from this study can be pivotal in creating proactive or responsive approaches to tackle business network difficulties. Legitimacy issues within variables carry significant weight, especially in sustainable networks, as they are difficult to address directly. Although external factors may be helpful during start-up, they can become uncontrollable obstacles for entrepreneurs in developing the network. Practical and Social Implications. The paper presents research-based recommendations for SMEs to overcome tensions and achieve external legitimacy through supplier support and customer recognition of added value. It also proposes effective management practices and regulatory guidance for policymakers. Originality of the study. While the benefits of business networking and interaction have been primarily emphasised, research on the problems and tensions in interaction and networking still needs improvement. This paper has tried to develop a deeper analysis of the concrete problems that can emerge in business networks, with particular attention paid to those SMEs networks that aim to reach sustainability goals

Prevention at work and stress evaluation in France and in Italy / La prévention sur les lieux de travail et l’évaluation du stress en France et en Italie / Prevenzione nei luoghi di lavoro e valutazione dello stress in Francia e in Italia

A European directive, transposed into the legal systems of the member States, steers towards an idea of prevention that is primary, general, programmed and integrated in work design. The interpretation of norms and the guidelines of institutions devoted to health and safety in the workplace direct, however, towards the management of existing risks. This is particularly evident as far as stress and the so called psycho-social risks are concerned. Even the approaches of disciplines regarding work follow the same trend. A real and effective protection of well-being appears to be neglected, and this is confirmed by statistics about physical and psychological damages to workers. The contributions in this collection concern France and Italy, where, however, internationally recognized approaches, allowing primary prevention interventions on work, have been developed

Carbon-dots-conjugated semiconductors for enhanced solar-driven photocatalysis

In the last decades, the rising levels of carbon dioxide (CO2) in the atmosphere have been increasingly attributed to the global warming effect. Photocatalysis, which exploits the energy of light and abundant semiconductor materials, may represent a promising method to enable more sustainable catalytic reactions. However, the current applicability is mainly hindered by the design of materials capable of efficiently harvesting solar light to conduct photo-catalytic reactions. In this context, the conjugation of carbon dots with semiconductor materials was studied as tool to increase the visible-light sensitivity of titanium oxide (TiO2) and barium titanate (BaTiO3). The hybrid materials were tested for their photo-activity in two distinct reactions and upon the irradiation of either UV or solar light. Two different deposition methods were studied as to provide a scalable strategy to the design of versatile photocatalyst. As results, although all the prepared materials were found to be active in both UV and visible-light irradiating conditions, only carbon-modified semiconductors were able to convert CO2 into methane upon solar light excitation. In addition, carbon-dots-BaTiO3 conjugates were proposed for the first time as valid alternative to TiO2-based photocatalysts, especially in the CO2 photo-reduction reactions. If properly designed, carbon dots may represent a way to overcome some of the current limitations to the application of photocatalytic processes for the development solar-powered technologies

Sustainability of using vineyard pruning residues as an energy source: Combustion performances and environmental impact

Open burning of agricultural waste is still a common practice as it is a rapid method for waste disposal, although natural biomass, including agriculture residues, can be exploited as a renewable energy source. We assessed the viability and sustainability of using vineyard pruning residues, as wood chips, for energy conversion. Wood chips, obtained from vineyards in the Prosecco DOCG region (Italy), were characterized in terms of chemical composition, calorific value, ash content and humidity. Combustion tests were performed in a medium-size biomass boiler (maximum power 500 kW) to assess the viability of the approach in terms of sustainable steady-state combustion. Primary emissions of both macro- and micro-pollutants were measured to assess the environmental impact. An analytical method was purposely developed for the determination of polycyclic aromatic hydrocarbons (PAHs), polychlorinated biphenyls (PCBs), polychlorinated dibenzo-p-dioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs) and in three matrices: fly ashes, condensate and gas. The results showed that vineyard pruning residues can be used for energy conversion in medium- and large-scale biomass boilers. Primary emissions of measured pollutants were all below limit values set by current European legislation except for particulate matter, for which current available abatement technologies are required to contain emissions, abatement technologies are required to contain emissions, thus making the use of vineyard pruning residues unsuitable for combustion in domestic appliances where such technologies are not installed. Bottom ashes produced during combustion were also characterized to assess whether they can be recycled in the vineyard as soil amendments/fertilizer. Copper content in combustion ashes exceeded limit values for ashes to be used as fertilizers in agricultural fields for some European countries but not for others, indicating that ashes may need to be disposed as waste

J.D. Thompson’s Organizations in Action 50th anniversary: a reflection

At the 50th anniversary of James D. Thompson’s fundamental book, Organizations in Action, TAO Digital Library proposes a reflection on this great master’s legacy and the evolution of organizational studies. Twelve researchers, from different disciplinary fields, analyze both the texts utilized for teaching and the contribution of several important journals, particularly in recent decades. The outcome is an overall picture that may stimulate different, divergent evaluations and, even more importantly, desirable, deeper reflections

A vertical facility based on raster scan configuration for the x-ray scientific calibrations of the ATHENA optics

The ATHENA X-ray observatory is a large-class ESA approved mission, with launch scheduled in 2028. The technology of Silicon Pore Optics (SPO) was selected since 2004 as the baseline for making the X-ray Mirror Assembly. Up to 700 mirror modules to obtain a nested Wolter like optics. The maximum diameter of the shells will be 2.5 m while the focal length is 12 m. The requirements for on-axis angular resolution and effective area at 1 keV are 5 arcsec HEW and 1.4 m2, while the field of view will be 40 arcmin in diameter (50 % vignetting). While in this moment there an on-going effort aiming at demonstrating the feasibility of a so large optics with so stringent scientific requirements, an important aspect to be considered regards the scientific calibrations of the X-ray optics. In this respect, the Point Spread Function and effective area have to be correctly measured and calibrated on-ground at different energies across the entire field of view, with a low vignetting. The approach considered so far foresees the use of a long (several hundreds of meters) facility to allow a full illumination with low divergence of the entire optics module (or at least of large sections of it). The implementation of similar configurations in a completely new facility to be realized in Europe (friendly called "super Panter") or the retrofitting existing facilities like the XRCF at NASA/MSFC are being considered. In both cases the costs and the programmatic risks related to the implementation of these huge facilities, with their special jigs for the alignment of the ATHENA optics, represent important aspects to be considered. Moreover, the horizontal position of the optics to be used in full illumination facilities would determine gravitational deformations, not easy to be removed with actuators or by modeling. In this talk we will discuss a completely different concept, based on the mount of the optics in vertical position and the use of a raster scan of the ATHENA optics with a small (a few cm2 wide) highly collimated (1 arcsec or so) white beam X-ray. This system will allow us to operate a much compact system. The use of a vertical configuration will imply smaller gravitational deformations, that can be controlled with actuators able to compensate them. A proper camera system with a sufficient energy resolution will be able to grant a correct measurement of both PSF and effective area of the Mirror Assembly within the calibration requirements and in a reasonable integration time. Moreover, it may allow us also to perform end-to-end tests using the two flight focal plane instruments of ATHENA. The cost and risks for the implementation would be much lower than for the full illumination systems. The conceptual configuration and preliminary expected performance of the facility will be discussed

Search for dark matter produced in association with bottom or top quarks in √s = 13 TeV pp collisions with the ATLAS detector

A search for weakly interacting massive particle dark matter produced in association with bottom or top quarks is presented. Final states containing third-generation quarks and miss- ing transverse momentum are considered. The analysis uses 36.1 fb−1 of proton–proton collision data recorded by the ATLAS experiment at √s = 13 TeV in 2015 and 2016. No significant excess of events above the estimated backgrounds is observed. The results are in- terpreted in the framework of simplified models of spin-0 dark-matter mediators. For colour- neutral spin-0 mediators produced in association with top quarks and decaying into a pair of dark-matter particles, mediator masses below 50 GeV are excluded assuming a dark-matter candidate mass of 1 GeV and unitary couplings. For scalar and pseudoscalar mediators produced in association with bottom quarks, the search sets limits on the production cross- section of 300 times the predicted rate for mediators with masses between 10 and 50 GeV and assuming a dark-matter mass of 1 GeV and unitary coupling. Constraints on colour- charged scalar simplified models are also presented. Assuming a dark-matter particle mass of 35 GeV, mediator particles with mass below 1.1 TeV are excluded for couplings yielding a dark-matter relic density consistent with measurements