Search results

1 – 8 of 8
Per page
102050
Citations:
Loading...
Access Restricted. View access options
Article
Publication date: 4 June 2020

Bernardo Lourenço, Tiago Madeira, Paulo Dias, Vitor M. Ferreira Santos and Miguel Oliveira

2D laser rangefinders (LRFs) are commonly used sensors in the field of robotics, as they provide accurate range measurements with high angular resolution. These sensors can be…

108

Abstract

Purpose

2D laser rangefinders (LRFs) are commonly used sensors in the field of robotics, as they provide accurate range measurements with high angular resolution. These sensors can be coupled with mechanical units which, by granting an additional degree of freedom to the movement of the LRF, enable the 3D perception of a scene. To be successful, this reconstruction procedure requires to evaluate with high accuracy the extrinsic transformation between the LRF and the motorized system.

Design/methodology/approach

In this work, a calibration procedure is proposed to evaluate this transformation. The method does not require a predefined marker (commonly used despite its numerous disadvantages), as it uses planar features in the point acquired clouds.

Findings

Qualitative inspections show that the proposed method reduces artifacts significantly, which typically appear in point clouds because of inaccurate calibrations. Furthermore, quantitative results and comparisons with a high-resolution 3D scanner demonstrate that the calibrated point cloud represents the geometries present in the scene with much higher accuracy than with the un-calibrated point cloud.

Practical implications

The last key point of this work is the comparison of two laser scanners: the lemonbot (authors’) and a commercial FARO scanner. Despite being almost ten times cheaper, the laser scanner was able to achieve similar results in terms of geometric accuracy.

Originality/value

This work describes a novel calibration technique that is easy to implement and is able to achieve accurate results. One of its key features is the use of planes to calibrate the extrinsic transformation.

Details

Industrial Robot: the international journal of robotics research and application, vol. 47 no. 5
Type: Research Article
ISSN: 0143-991X

Keywords

Access Restricted. View access options
Article
Publication date: 17 September 2020

Fernanda Silva Farinazzo, Tiago Bervelieri Madeira, Maria Thereza Carlos Fernandes, Carolina Saori Ishii Mauro, Adriana Aparecida Bosso Tomal, Suzana Lucy Nixdorf and Sandra Garcia

The objective of this study was to evaluate the influence of Saccharomyces boulardii on the kinetics of fermentation for organic and conventional apple pulp and to verify the…

235

Abstract

Purpose

The objective of this study was to evaluate the influence of Saccharomyces boulardii on the kinetics of fermentation for organic and conventional apple pulp and to verify the effect of the antioxidant quercetin on the response to cellular oxidative stress.

Design/methodology/approach

The kinetic parameters, the content of phenolic compounds, the quantity of quercetin and the antioxidant activity were determined during the fermentation process. The effect of quercetin on cellular oxidative stress was also investigated.

Findings

The content of phenolic compounds, the antioxidant activity and the quercetin concentration were higher in the organic fermented apple pulp (ORG) than in the conventional fermented apple pulp (CON). However, both apple pulps were considered ideal substrates for the growth of S. boulardii, suggesting that they are potentially probiotic. After fermentation, the quercetin concentration in the ORG treatment and YPDQ treatment (YPD broth with 0.1 mg quercetin rhamnoside/mL) increased viability by 9%, while in the CON treatment generated there was an increase of 6% in viability, compared to the YPD control treatment (YPD broth).

Originality/value

The high concentration of quercetin in the organic apple pulp supports the proposal that quercetin reduces the oxidative stress mediated by reactive oxygen species through its antioxidant action on S. boulardii that have similarities to mammalian eukaryotic cells. These findings suggest that fermented organic apple pulp could be consumed as a potential non-dairy probiotic product.

Details

British Food Journal, vol. 123 no. 2
Type: Research Article
ISSN: 0007-070X

Keywords

Access Restricted. View access options
Book part
Publication date: 2 December 2024

Gabriela Dione Florêncio de Lima, Kettrin Farias Bem Maracajá and Tiago Savi Mondo

The significance of event tourism in destination development underscores the importance of assessing the quality of events and their sustainability for competitiveness. This study…

Abstract

The significance of event tourism in destination development underscores the importance of assessing the quality of events and their sustainability for competitiveness. This study investigates tourists’ perceptions of service quality and sustainability at the “Biggest São João in the World” event in 2023. Employing a quantitative approach, we conducted field research using questionnaires based on the Tourqual model, integrating sustainability indicators to address environmental impacts associated with such events. Data collection took place between June and July 2023, with a non-probabilistic convenience sample of 709 visitors. Descriptive statistics were applied to the 2022 survey data (397 respondents), on the 2023 data (709 respondents). Results reveal that the event’s diverse activities received the highest average rating at 4.03, while the use of sustainable transport during the event garnered the lowest rating at 1.93. This emphasizes the need for event organizers to implement continuous improvement plans, focusing particularly on areas with critical evaluations to enhance visitor satisfaction. This study’s originality and innovative approach contribute valuable insights for event managers and researchers and promote both local development and environmental awareness.

Details

The Need for Sustainable Tourism in an Era of Global Climate Change: Pathway to a Greener Future
Type: Book
ISBN: 978-1-83608-669-7

Keywords

Access Restricted. View access options
Article
Publication date: 11 June 2018

Alberto Javier Báez-García, Francisco Flores-Muñoz and Josué Gutiérrez-Barroso

The main purpose of this paper is to contribute to the ongoing literature on the pertinence of TALC (tourism area life cycle) to model and analyse mature destinations, using…

580

Abstract

Purpose

The main purpose of this paper is to contribute to the ongoing literature on the pertinence of TALC (tourism area life cycle) to model and analyse mature destinations, using quantitative data and alternative functional forms. With this purpose, this work analyses the recent data on tourist demand in Tenerife (Canary Islands), which is supposed to be playing the role of “refuge” with respect to other competing resorts, when the latter ones present political instability after the so-called Arab Springs, particularly the Middle East and North Africa.

Design/methodology/approach

To analyse the data, and to explore potential epiphenomenon, nonlinear competing regression analysis were performed (logistic, Gaussian and logarithmic), taking into account some insights from tourism life cycle theories.

Findings

Some suggestions are presented for political management of these destinations that are still working under a moratorium on tourist infrastructure.

Research limitations/implications

Once the TALC is accepted – even under discussion – in the scholarly fore, certain incentives arise to identify, interpret and communicate signals of maturity. Public funds and specific policies (moratoria) can then be solicited to political instances. Further empirical research, complementary quantitative approaches, along with new data that confronts the evolution of demand in Tenerife with paulatine reactivation of competing destinations, will be strongly required to overcome the limitations of this first attempt and to properly determine the effectiveness of rejuvenation policies. Besides, additional quantitative data should be considered to explore the potential explanatory factors beyond the time series analysis into models that are more theoretical.

Originality/value

The results suggest that the diagnosis of maturity was at least premature in the first place, poorly based on data analysis and fast in promoting specific policies whose effectiveness is under discussion even after decades.

Details

Tourism Review, vol. 73 no. 3
Type: Research Article
ISSN: 1660-5373

Keywords

Access Restricted. View access options
Article
Publication date: 25 January 2023

Farhad Nazir

The purpose of this study is to discern the underlying dimensions of destination branding and social media in the socio-geographical context of Pakistan. The study while selecting…

911

Abstract

Purpose

The purpose of this study is to discern the underlying dimensions of destination branding and social media in the socio-geographical context of Pakistan. The study while selecting an event – Pakistan Tourism Summit 2019 – has explored the narratives of foreign social media influencers (SMIs). These narratives and content of tourism website of Pakistan have been comparatively analyzed to disentangle the voluntary and involuntary branding eventualities.

Design/methodology/approach

Qualitative research strategy has been adopted. Using the interface of NVivo 12, thematic analysis on the narratives of foreign influencers and content of tourism website has been performed. Eventually, influencer’s videos and website’s content have been transcribed and integrated into inductive themes.

Findings

The findings implies that multiple halt points exist in tourism branding of Pakistan. Stigmatized image as a dangerous place for visitation, superficial/exaggerated branding by the influencers, colonial mindset to marginalize the domestic influencers, domestic branding through foreign influencers and veiled tourism potential are the various dimensions emerged during analysis phase.

Research limitations/implications

Given the limitations of the qualitative research approach, the current study lacks statistical avenues of quantitative or mix-method studies. Selection of a single event and website further limits this study and calls for the necessity of future studies having wider units of data collection and other portals of social media.

Practical implications

For policy makers, academia and supply sector, this study offers touchpoints to be emphasized in the strategic, legal and theoretical fronts of destination branding.

Originality/value

Despite the hegemony of SMIs in destination branding, there is scarcity of research on the paybacks of such branding campaigns. This endeavor in response to this call, accentuated the destination branding via foreign social media activists regarding the tourism potential of Pakistan. Findings provides novel insights and branding ethos deemed necessary to be considered in destination branding strategies/campaigns.

Details

Qualitative Market Research: An International Journal, vol. 26 no. 4
Type: Research Article
ISSN: 1352-2752

Keywords

Available. Open Access. Open Access
Article
Publication date: 30 November 2020

Dalvia Rodrigues and Luis F. Martinez

The purpose of this paper is to unfold how different digital marketing tools and strategies influence recruitment effectiveness. More specifically, it focusses on understanding…

23177

Abstract

Purpose

The purpose of this paper is to unfold how different digital marketing tools and strategies influence recruitment effectiveness. More specifically, it focusses on understanding if, and how, information sources’ credibility, content marketing, and organisational reputation influence candidates’ decision to apply for a job in the Portuguese market.

Design/methodology/approach

A qualitative research, aligned with a content analysis, was conducted to focus on the insights from the 21 participants interviewed, to understand their thoughts and experiences regarding the subject.

Findings

The results show that digital marketing tools owned by the company are seen to be more credible and more relevant for the job application decision. LinkedIn is considered to be a more credible platform for advertising job openings than Facebook. In terms of content marketing, LinkedIn has a positive influence on candidates’ decision, as well as companies’ reputation.

Practical implications

This study provides practical implications which are useful for both HR and marketing managers, namely, the implementation of an integrated marketing communication strategy, the reinforcement of the company’s website and LinkedIn page and a presence on universities’ platforms, and also in terms of the information that content marketing should focus on.

Originality/value

This research paper incorporates marketing insights into a well-known HRM subject – recruitment, and thus adds further knowledge to the literature and prepares the ground for researchers who wish to explore this subject further.

Details

European Journal of Management Studies, vol. 25 no. 1
Type: Research Article
ISSN: 2183-4172

Keywords

Access Restricted. View access options
Article
Publication date: 11 June 2018

Patricia Raposo, Michael Andrade, José Correia, Maria E. Salavessa, Cristina Reis, Carlos Oliveira and Abilio M.P. de Jesus

The case-study building of this work is the Medieval Inn of Gralheira (“Pousada Medieval da Gralheira”) located in Vila Pouca de Aguiar, Portugal. This building is an example of…

72

Abstract

Purpose

The case-study building of this work is the Medieval Inn of Gralheira (“Pousada Medieval da Gralheira”) located in Vila Pouca de Aguiar, Portugal. This building is an example of the structures of that time, located in Trás-os-Montes, Portugal. A large amount of the built heritage suffers from advanced degradation, making the recovery, increasing the complexity of the rehabilitation and restoration intervention and implying a highly specialized interdisciplinary component. Therefore, the purpose of this paper is to carry out a study of the building in order to perform an analysis of its wood floor and assess its structural behaviour and conservation status. This work also presents some examples of intervention methods and rehabilitation techniques used to solve problems in the masonry structure and wood structures.

Design/methodology/approach

In this work, a numerical model of a wood pavement of a medieval building is presented, which was developed and calibrated with values obtained in an experimental campaign of wood specimens extracted from the floor structure and the deformation measured in situ. This model aims to analyse and predict the behaviour of the structure in terms of serviceability limit states. Rehabilitation and reinforcing techniques are described, for specific damages, complemented with a critical comparative analysis to define the most appropriate rehabilitation measures for each situation.

Findings

In this work, for the numerical model of the medieval building under consideration, the support of the beams in the walls between 50 per cent embedded and simply supported (hinge supports) was used. Since the beams have some restriction imposed by the wall, they have a delivery about 20 cm in the wall. The consideration of the delivery between beam and columns as simply supported (hinge supports) is a reasonable approximation. There is a difference between the values of deformation obtained in the numerical model and in situ due to the support conditions and also due to the consideration of the pavement loads as a distributed load, which does not correspond entirely to reality, since the pavement confers rigidity to the floor, behaving like a diaphragm. The presented intervention techniques are not applicable in all structures because each building has different characteristics, in terms of materials and construction. The pathologies occur due to many sources and each case is unique, and must be carefully studied before taking decisions about the rehabilitation methods to use.

Originality/value

This work presents a numerical model of wood pavement of a medieval building developed according to some experimental values obtained in an experimental campaign using wood specimens extracted from original beams and based on in situ measurements. This study is part of master thesis of Michael Andrade, an original research work.

Details

International Journal of Structural Integrity, vol. 9 no. 3
Type: Research Article
ISSN: 1757-9864

Keywords

Available. Open Access. Open Access
Article
Publication date: 9 December 2024

Carla Fontes and Mario Franco

Research and development (R&D) initiatives are fundamental for society to evolve in its social, economic, technological and environmental dimensions. This study aimed to provide a…

58

Abstract

Purpose

Research and development (R&D) initiatives are fundamental for society to evolve in its social, economic, technological and environmental dimensions. This study aimed to provide a view of what motivates researchers to participate in such projects as well as the benefits and barriers they encounter when cooperating in R&D projects.

Design/methodology/approach

A qualitative methodology was adopted, within which a case study was conducted: R&D project “GreenHealth - Digital Strategies”. This initiative was based on leveraging biological assets to improve well-being and promote health. Data were obtained from 10 interviews with researchers and documentary analysis such as the project’s official website and social media accounts.

Findings

The content analysis led to the conclusion that the researchers’ motivations for participating in R&D projects were the opportunity to contribute to scientific and social evolution, the creation of knowledge and personal factors inherent to the participating researchers. The benefits they derived were related to creating and spreading knowledge, as well as financial incentives. Barriers to participation were related to management, communication, organisational culture, the COVID-19 pandemic.

Practical implications

From this study the research team members can understand the importance of cooperation between institutions, which illustrates the importance of creating and transferring knowledge. This study shows also that, in R&D projects, educational and health institutions access new knowledge, attract highly qualified personnel/researchers, establish networks and share financial risks.

Originality/value

The study’s innovation derives from its demonstration that an R&D project of this nature is important for several organisations to develop the conception and implementation of a long-term strategy centred on human beings and focused on the eco-sustainability of the affected regions.

Details

Asia Pacific Journal of Innovation and Entrepreneurship, vol. 19 no. 1
Type: Research Article
ISSN: 2071-1395

Keywords

1 – 8 of 8
Per page
102050