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The primary purpose of this study is to analyse the performance of multirotor unmanned aircraft system platforms for passenger transport and compare them with an ordinary helicopter solution. This study aims to define a standard procedure for power budget analysis of unconventional vehicles recently proposed in the aerospace industry, providing guidelines on rotor sizing in terms of required power and the total number of rotors. The ultimate purpose of the proposed work is to describe a methodology for power estimation with regard to emerging electric vertical takeoff and landing (EVTOL) vehicles.

In the context of urban mobility, short-range passenger transport between critical hubs in cities is taken into account and innovative aircraft and traditional helicopters are compared according to a common mission profile. The power budget equations used in the helicopter literature are revisited to consider different multirotor configurations (up to 20 rotors) and evaluate the feasibility of innovative aerospace vehicle design.

The paper includes insights into the maximum number of rotors that ensure a significative, relative power reduction compared to helicopter platforms (the power-to-cruise over power-to-hover ratio appears to be improved). Based on this preliminary analysis, the results suggest the benefit of reducing the installed rotors to avoid excessive power loss in forward flight.

The proposed study provides guidelines for further design considerations and the future development of EVTOL multirotor aircraft.

This paper fulfils the identified need for a systematic approach on performance analysis for innovative vehicles involved in commercial applications.

The purpose of this paper is to evaluate the applicative potentiality of functional/self-responsive materials in aeronautics. In particular, the study aims to experimentally validate the enhancement of structural performances of carbon fibers samples in the presence of nanofillers, as multi-walled carbon nanontubes or microcapsules for the self-healing functionality.

The paper opted for a mechanical study. Experimental static and dynamic tests on “blank” and modified formulations were performed in order to estimate both strength and damping parameters. A cantilever beam test set-up has been proposed. As a parallel activity, a numerical FE approach has been introduced to assess the correct modeling of the system.

The paper provides practical and empirical insights about how self-responsive materials react to mechanical solicitations. It suggests that reinforcing a sample positively affects the samples properties since they, de facto, improve the global structural performance. This work highlights that the addition of carbon nanotubes strongly improves the mechanical properties with a simultaneous slight enhancement in the damping performance. Damping properties are, instead, strongly enhanced by the addition of self-healing components. A balanced combination of both fillers could be adopted to increase electrical conductivity and to improve global performance in damping and auto-repairing properties.

The paper includes implications for the use of lightweight composite materials in aeronautics.

This paper fulfills an identified need to study new lightweight self-responsive smart materials for aeronautical structural application.

Using data for a set of 32 Sub-Saharan countries over the years 2000, 2005 and 2010, the paper investigates the effects of domestic governmental stability upon emigration and assesses whether education and gender shape the relationship.

The paper adopts instrumental variable (IV) Poisson regressions and two-stage least squares (2SLS) as robustness tests.

The paper suggests that increased governmental stability has a larger impact on the emigration of high-skilled individuals. Nevertheless, once emigrants are partitioned according to both education and gender, the authors find evidence of a larger impact of stability on the emigration of highly educated females.

The empirical findings may lack generalizability because of the chosen research approach. Then, researchers are encouraged to test the proposed propositions further.

The paper includes implications that can be drawn for both the growth and the development of Sub-Saharan Africa.

This paper fulfills an identified need to study how both education and gender shape the relationship between domestic governmental stability and emigration.

The paper aims at addressing the following research questions: does institutional quality improve countries' environmental efficiency? And which pillars of institutional quality improve countries' environmental efficiency?

By specifying a directional distance function in the context of stochastic frontier method where GHG emissions are considered as the bad output and the GDP is referred as the desirable one, the work computes the environmental efficiency into the appraisal of a production function for the European countries over three decades.

According to the countries' performance, the findings confirm that high and upper middle-income countries have higher environmental efficiency compared to low middle-income countries. In this environmental context, the role of institutional quality turns out to be really important in improving the environmental efficiency for high income countries.

This article attempts to analyze the role of different dimensions of institutional quality in different European countries' performance – in terms of mitigating GHGs (undesirable output) – while trying to raise their economic performance through their GDP (desirable output).

1. The paper aims at addressing the following research question: does institutional quality improve countries' environmental efficiency?

2. We adopt a directional distance function in the context of stochastic frontier method, considering 40 European economies over a 30-year time interval.

3. The findings confirm that high and upper middle-income countries have higher environmental efficiency compared to low middle-income countries.

4. The role of institutional quality turns out to be really important in improving the environmental efficiency for high income countries, while the performance decreases for the low middle-income countries.

The paper aims at addressing the following research question: does institutional quality improve countries' environmental efficiency?

We adopt a directional distance function in the context of stochastic frontier method, considering 40 European economies over a 30-year time interval.

The findings confirm that high and upper middle-income countries have higher environmental efficiency compared to low middle-income countries.

The role of institutional quality turns out to be really important in improving the environmental efficiency for high income countries, while the performance decreases for the low middle-income countries.

The purpose of this paper is to offer a fresh framing of innovation, as service innovation/value innovation.

By examining the visions, patterns and outcomes of three different research approaches to understanding innovation – goods-dominant (G-D) logic, the resource-based approach and service-dominant (S-D) logic – the authors strive to outline the contribution of each to the debate on innovation. This investigation involves a comprehensive literature review. Scrutiny of a case company provides a means of identifying and illustrating how these approaches play out in a real business context.

A framework for innovation builds on the comparison of the three research approaches. G-D logic, when analysed in terms of new product development and new service development, positions innovation as an output (a new good or service) of a business's internal processes, with the firm as the main actor. The resource-based approach establishes the drivers of innovation as knowledge, capabilities and relationships, but the firm is still the main innovator. S-D logic addresses “open” innovation processes in which all actors in the network can mobilize and integrate their resources to become value co-innovators.

This study builds on the literature review by offering a more systematic way of dealing with the different research traditions in innovation debate.

This study spurs managers to question the validity of dominant logic and how it affects the decision-making process. The conceptualization of innovation within S-D logic provides new avenues for decision makers and practitioners to tackle topical challenges of global competition.

The value of this paper lies in defending the premise that S-D logic is better suited than the other two research traditions to frame current innovation within the context of global competition because it moves innovation beyond mainstream conceptualization: from “products and services” to “service and value”, from “buyer-seller dyads” to “ecosystem relationships”, and from “closed/linear process” to “open/co-created process”.

The major search, display, and related features of WILSONLINE are described. A more detailed description can be found in WILSONLINE: Guide and Documentation (The H. W. Wilson Co., 1984. $30.)

The paper aims to provide a decision-support model to ensure a proper use of the limited resources, financial and not, for the enhancement of the cultural heritage and comprehensive development of small towns from sustainable perspective.

The assessment model is set up using a multi-criteria method that combines elements of linear planning with a performance indicators system that may represent the complexity of the territory’s cultural identity as a result of existing cultural-historical assets.

The model reliability is tested in a case study in a Municipality in southern Italy. The case study’s findings highlight the advantages for the public/private operators, who can consciously choose which preservation and restoration projects to fund while taking into account the effects those decisions will have on the economic, social and environmental context of reference.

Due to the suggested operational approach and the selection of variables for accounting economic, social and environmental impacts by the renewal project, the research findings may not be generalizable. Therefore, it is recommended that researchers look into the suggested theories in more detail.

The study offers implications for designing a user-friendly tool to help decision-making processes from a private–public viewpoint in a reasonable allocation of financial resources among investments for cultural property asset enhancement.

The suggested operational approach provides a reliable information apparatus to depict the decision-making process under small-town development in accordance with sustainability dimensions.

To facilitate the reception and care of discharged patients, streamlining processes at the University Hospital and promoting a seamless transition to continuity of care services post-discharge.

Hospitalised patients undergo the Blaylock risk assessment screening score (BRASS), a screening tool identifying those at risk of complex discharge.

Pre-pandemic, patients with a medium-to-high risk of complex discharge were predominantly discharged to their residence or long-term care facilities. During the pandemic, coinciding with an overall reduction in hospitalisation rates, there was a decrease in patients being discharged to their residence.

The analysis of discharges, with the classification of patients into risk groups, revealed a coherence between the BRASS score and the characteristics of the studied sample. This tool aids physicians in decision-making by identifying the need for a planned discharge in a systematic and organised manner, preventing the loss of crucial information.

The paper aims to estimate the capacity of supreme audit institutions’ (SAIs) audits to deter potentially wasteful year-end procurement spending. It also studies heterogeneous responses to SAIs’ audits depending on whether agencies’ top managers are appointed through a competitive procedure or not.

A letter signed by the head of Chile’s SAI was sent to a hundred randomly chosen agencies two weeks before the end of the fiscal year, with instructions on year-end spending accounting and an audit threat. In addition, a hundred agencies that did not receive the letter were used as a control group.

Agencies that received the letter reduced year-end aggregate procurement spending by 33% relative to controls. Purchases of office supplies, safety equipment, personal care products and paper products experienced the most considerable reductions. The decrease in year-end spending was smaller for agencies with at least one top manager appointed through a competitive procedure.

A SAI’s audit threat significantly reduced year-end procurement spending. Larger reductions in agencies headed by political appointees and across categories of goods that have been flagged as likely to be purchased to exhaust the budget suggest the avoided expenditures would have been wasteful. Further research is needed to determine if the net social value of year-end procurement spending deterred by SAIs audits is negative as suggested.

This paper has implications for the institutional support of SAIs audits and civil service.

This paper provides novel experimental evidence of SAIs’ audits’ deterrence power on public agencies’ year-end procurement spending.