Search results

1 – 9 of 9
Content available
Article
Publication date: 8 July 2022

Vania Vidal, Valéria Magalhães Pequeno, Narciso Moura Arruda Júnior and Marco Antonio Casanova

Enterprise knowledge graphs (EKG) in resource description framework (RDF) consolidate and semantically integrate heterogeneous data sources into a comprehensive dataspace…

Abstract

Purpose

Enterprise knowledge graphs (EKG) in resource description framework (RDF) consolidate and semantically integrate heterogeneous data sources into a comprehensive dataspace. However, to make an external relational data source accessible through an EKG, an RDF view of the underlying relational database, called an RDB2RDF view, must be created. The RDB2RDF view should be materialized in situations where live access to the data source is not possible, or the data source imposes restrictions on the type of query forms and the number of results. In this case, a mechanism for maintaining the materialized view data up-to-date is also required. The purpose of this paper is to address the problem of the efficient maintenance of externally materialized RDB2RDF views.

Design/methodology/approach

This paper proposes a formal framework for the incremental maintenance of externally materialized RDB2RDF views, in which the server computes and publishes changesets, indicating the difference between the two states of the view. The EKG system can then download the changesets and synchronize the externally materialized view. The changesets are computed based solely on the update and the source database state and require no access to the content of the view.

Findings

The central result of this paper shows that changesets computed according to the formal framework correctly maintain the externally materialized RDB2RDF view. The experiments indicate that the proposed strategy supports live synchronization of large RDB2RDF views and that the time taken to compute the changesets with the proposed approach was almost three orders of magnitude smaller than partial rematerialization and three orders of magnitude smaller than full rematerialization.

Originality/value

The main idea that differentiates the proposed approach from previous work on incremental view maintenance is to explore the object-preserving property of typical RDB2RDF views so that the solution can deal with views with duplicates. The algorithms for the incremental maintenance of relational views with duplicates published in the literature require querying the materialized view data to precisely compute the changesets. By contrast, the approach proposed in this paper requires no access to view data. This is important when the view is maintained externally, because accessing a remote data source may be too slow.

Details

International Journal of Web Information Systems, vol. 18 no. 5/6
Type: Research Article
ISSN: 1744-0084

Keywords

Open Access
Article
Publication date: 27 April 2020

Massimo Sargiacomo, Christian Corsi, Luciano D'Amico, Tiziana Di Cimbrini and Alan Sangster

The paper investigates the closure mechanisms and strategies of exclusion concerning the establishment and subsequent functioning of the Collegio dei Rasonati, the professional…

Abstract

Purpose

The paper investigates the closure mechanisms and strategies of exclusion concerning the establishment and subsequent functioning of the Collegio dei Rasonati, the professional body of accountants that was established in Venice in 1581 and operated until the end of the 18th century.

Design/methodology/approach

The research design offers a critical longitudinal explanation of the emergence of the Collegio dei Rasonati as a professional body in the context of Venetian society by relying on the social closure theory elaborated by Collins (1975); Parkin (1979) and Murphy (1988).

Findingse

The Collegio dei Rasonati was established to overcome the prerogatives of a social class in accessing the accounting profession. However, the pre-existing professional elites enacted a set of social closure strategies able to transform this professional body into a stronghold of their privileges.

Research limitations/implications

As virtually all of the evidence concerning the admission examinations has been lost over time, the investigation is restricted to the study of the few examples that have survived. The main implication of the study concerns the understanding of some dynamics leading to neutralize attempts to replace class privileges with a meritocratic system.

Originality/value

The research investigates the structure of the rules of social closure revealing the possibility of an antagonistic relationship between different co-existing forms of exclusion within the same structure. Moreover, it highlights that a form of exclusion can be made of different hierarchical levels.

Details

Accounting, Auditing & Accountability Journal, vol. 33 no. 5
Type: Research Article
ISSN: 0951-3574

Keywords

Article
Publication date: 2 May 2017

Marco António Mexia Arraya and Jose António Porfírio

Training as an important source of dynamic capabilities (DC) is important to the performance of sports’ organisations (SO) both to athletes and to non-athletic staff. There are a…

Abstract

Purpose

Training as an important source of dynamic capabilities (DC) is important to the performance of sports’ organisations (SO) both to athletes and to non-athletic staff. There are a variety of training delivery methods (TDMs). The purpose of this study is to determine from a set of six TDMs which one is considered to be the most suitable to enhance performance of SO.

Design/methodology/approach

Based on the DC theory, a cross-sectional survey from a sample of 554 workers was used to assess which TDM is considered to be the most efficient and presents higher efficacy, according to the preferences and perception of the staff.

Findings

It was concluded that: “on-the-job training” is considered to be the preferred and most effective TDM; formal/informal coaching is the second choice, in terms of perceived effectiveness and “online learning” is considered the least effective TDM. TDM’s preferences and results’ perceptions do not change according to differentiating issues such as gender, educational level of trainees or even hierarchical position.

Research limitations/implications

The present study adopted a cross-sectional survey where relationships and correlations were developed continuously. Although difficult to obtain, it would have been advisable to use a survey based on longitudinal data. Results should only be considered for the purposes of the present sample, although it may be considered that they are generalizable to similar organisations and some preliminary results are raised that worth being analysed further.

Practical implications

The outcomes of this study will help managers of SO, according to the situation to be addressed, to choose the best TDM for their non-athletic staff, the ones that will best support their process of continuous improvement and show the best results in terms of renewal of their DC and resources.

Originality/value

This study highlights the training process as a source of DC contributing to overall organisation’s performance and competitive advantage. It enlarges knowledge on SO, from the pure athletic view to the managerial point of view, and operationalises training to decide the most adequate TDM to improve DC and support the success of SO. Considering that it is usually difficult to measure the concrete results of training on the organisational performance, this is also an important field of study for the management theory in the domain of strategy and human resources because the bridge considered here has not been much developed for a long time.

Details

European Journal of Training and Development, vol. 41 no. 4
Type: Research Article
ISSN: 2046-9012

Keywords

Abstract

This essay aims at retracing the intellectual and biographical events of the economist Gino Arias (1879–1940), examining more in detail the two seasons at the opposite ends of his life: the early one that saw him considerably committed to the Zionist cause and the one that, thirty years later, would force him to confront the racial laws of the Fascist regime.

Despite the seeming tragic continuity of these two phases, Arias’s case is a real historiographical paradox since, over the long span between the opposite ends of his biography, not only did he distance himself from the Zionist movement, but he also gradually laid the foundations for his upcoming and immediate dedication to Fascism; indeed, within the Fascist regime he would stand out as an authoritative and influential theorist of corporatism, the institutional solution Mussolini tried to exploit to organize the national economic life.

After carefully examining Arias’s early contributions to the Zionist cause (that include the establishment of the Florentine Zionist Group and that led him toward strongly nationalistic stances), this essay sums up Arias’s intellectual biography during the next years and then, thanks to unprecedented documents from the Italian Ministry of Interior, closely looks into his fate after his conversion to Catholicism in 1932 and up against the racial laws of 1938, as well as into his attempts to escape persecution. A few final observations will then try to highlight the dramatic exemplarity of his case.

Details

A Research Annual
Type: Book
ISBN: 978-1-78441-154-1

Keywords

Article
Publication date: 17 March 2020

Hossein Dehdarirad, Javad Ghazimirsaeid and Ammar Jalalimanesh

The purpose of this investigation is to identify, evaluate, integrate and summarize relevant and qualified papers through conducting a systematic literature review (SLR) on the…

Abstract

Purpose

The purpose of this investigation is to identify, evaluate, integrate and summarize relevant and qualified papers through conducting a systematic literature review (SLR) on the application of recommender systems (RSs) to suggest a scholarly publication venue for researcher's paper.

Design/methodology/approach

To identify the relevant papers published up to August 11, 2018, an SLR study on four databases (Scopus, Web of Science, IEEE Xplore and ScienceDirect) was conducted. We pursued the guidelines presented by Kitchenham and Charters (2007) for performing SLRs in software engineering. The papers were analyzed based on data sources, RSs classes, techniques/methods/algorithms, datasets, evaluation methodologies and metrics, as well as future directions.

Findings

A total of 32 papers were identified. The most data sources exploited in these papers were textual (title/abstract/keywords) and co-authorship data. The RS classes in the selected papers were almost equally used. DBLP was the main dataset utilized. Cosine similarity, social network analysis (SNA) and term frequency–inverse document frequency (TF–IDF) algorithm were frequently used. In terms of evaluation methodologies, 24 papers applied only offline evaluations. Furthermore, precision, accuracy and recall metrics were the popular performance metrics. In the reviewed papers, “use more datasets” and “new algorithms” were frequently mentioned in the future work part as well as conclusions.

Originality/value

Given that a review study has not been conducted in this area, this paper can provide an insight into the current status in this area and may also contribute to future research in this field.

Details

Data Technologies and Applications, vol. 54 no. 2
Type: Research Article
ISSN: 2514-9288

Keywords

Article
Publication date: 1 December 2001

Martha Zarate

Looks at the first 100 years of Italian cinema examining its role in Italy’s recent history. Provides a bibliography of major film directors, Italian cinema sources, reference…

2909

Abstract

Looks at the first 100 years of Italian cinema examining its role in Italy’s recent history. Provides a bibliography of major film directors, Italian cinema sources, reference works, histories, themes, theory and criticism and articles in journals.

Details

Collection Building, vol. 20 no. 4
Type: Research Article
ISSN: 0160-4953

Keywords

Article
Publication date: 1 July 1992

John W. Barchfield

In contrast to liberal, orthodox Marxist and structuralinterpretations which attribute government policy in capitalist societyto exogenous forces, the state regularly possesses a…

Abstract

In contrast to liberal, orthodox Marxist and structural interpretations which attribute government policy in capitalist society to exogenous forces, the state regularly possesses a significant area of autonomy within which decisions are effectively determined by the political‐administrative elite (PAE). The majority of the economic projects emanating therefrom can be categorized as either aggrandizing populist or economistic. Postulates the choice of orientation depends upon PAE interests. Concludes that a purely aggrandizing project can be expected only in an environment of decisive underdevelopment while a populist one is almost inevitably a temporary response to conjunctural factors; most common, both in the advanced capitalist countries and the majority of Third World countries is a strong predisposition to an economistic project.

Details

International Journal of Social Economics, vol. 19 no. 7/8/9
Type: Research Article
ISSN: 0306-8293

Keywords

Article
Publication date: 18 April 2024

Juan Antonio Dip

Using sentiment analysis (SA), this study aims to examine the impact of COVID-19 on mental health and virtual learning experiences among 1,125 students at a public Argentinean…

Abstract

Purpose

Using sentiment analysis (SA), this study aims to examine the impact of COVID-19 on mental health and virtual learning experiences among 1,125 students at a public Argentinean faculty.

Design/methodology/approach

A study was conducted during the COVID-19 pandemic, surveying 1,125 students to gather their opinions. The survey data was analysed using text mining tools and SA. SA was used to extract the students’ emotions, views and feelings computationally and identify co-occurrences and patterns in related words. The study also examines educational policies implemented after the pandemic.

Findings

The prevalent emotions expressed in the comments were trust, sadness, anticipation and fear. A combination of trust and fear resulted in submission. Negative comments often included the words “virtual”, “virtual classroom”, “virtual classes” and “professor”. Two significant issues were identified: teachers’ inexperience with virtual classes and inadequate server infrastructure, leading to frequent crashes. The most effective educational policies addressed vital issues related to the “virtual classroom”.

Practical implications

Text mining and SA are valuable tools for decision-making during uncertain times, such as the COVID-19 pandemic. They can also provide insights to recover quality assurance processes at universities impacted by health concerns or external shocks.

Originality/value

The paper makes two main contributions: it conducts a SA to gain insights from comments and analyses the relationship between emotions and sentiments to identify optimal educational policies. The study pioneers exploring the link between emotions, policies and the pandemic at a public university in Argentina. This area of research still needs to be explored.

Details

Quality Assurance in Education, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 0968-4883

Keywords

Book part
Publication date: 24 February 2011

Josefa Salete Barbosa Cavalcanti, Mónica Isabel Bendini, Dalva Maria da Mota and Norma Graciela Steimbreger

This chapter probes the issue of capital mobility and its implications in the context of the globalization of the fresh fruit sector. In particular, it explores the relationship…

Abstract

This chapter probes the issue of capital mobility and its implications in the context of the globalization of the fresh fruit sector. In particular, it explores the relationship between productive capital and labor in two different Latin American regions: the Northeast of Brazil and Patagonia in Argentina. Employing a comparative approach, it studies the impact that the insertion of local production into global circuits has on local firms and labor. These relatively culturally and geographically distant locations are affected by similar phenomena created by the globalization of agrifood. Relevant among then are the marginalization of labor and a weak labor structure. While there has been the growth of local firms, this growth has not erased important weaknesses.

Details

Globalization and the Time–Space Reorganization
Type: Book
ISBN: 978-0-85724-318-8

1 – 9 of 9