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Article
Publication date: 7 November 2016

Cláudio Lima and Ronaldo Santos Mello

NoSQL databases do not require a default schema associated with the data. Even that, they are categorized by data models. A model associated with the data can promote better…

710

Abstract

Purpose

NoSQL databases do not require a default schema associated with the data. Even that, they are categorized by data models. A model associated with the data can promote better strategies for persistence and manipulation of data in the target database. Based on this motivation, the purpose of this paper is to present an approach for logical design of NoSQL document databases that consists a process that converts a conceptual modeling into efficient logical representations for a NoSQL document database. The authors also evaluate their approach and demonstrate that the generated NoSQL logical structures reduce the amount of data items accessed by queries.

Design/methodology/approach

This paper presents an approach for logical design of NoSQL document database schemas based on a conceptual schema. The authors generate compact and redundancy-free schemas and define appropriate representations in a NoSQL document logical model. The estimated volume of data and workload information can be considered to generate optimized NoSQL document structures.

Findings

This approach was evaluated through a case study with an experimental evaluation in the e-commerce application domain. The results demonstrate that the authors’ workload-based conversion process improves query performance on NoSQL documents by reducing the number of database accesses.

Originality/value

Unlike related work, the reported approach covers all typical conceptual constructs, details a conversion process between conceptual schemas and logical representations for NoSQL document database category and, additionally, considers the estimated database workload to perform optimizations in the logical structure. An experimental evaluation shows that the proposed approach is promising.

Details

International Journal of Web Information Systems, vol. 12 no. 4
Type: Research Article
ISSN: 1744-0084

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Article
Publication date: 2 November 2012

Peter Yamakawa, Claudio Obregón Noriega, Alfredo Novoa Linares and Willy Vega Ramírez

Although various practices to facilitate organizational change are proposed in the literature, very little is known about how these practices impact on ITIL adoptions. Therefore…

3447

Abstract

Purpose

Although various practices to facilitate organizational change are proposed in the literature, very little is known about how these practices impact on ITIL adoptions. Therefore, the purpose of this study is to address this gap in the literature by offering insights on how change management practices impact on levels of ITIL compliance.

Design/methodology/approach

This exploratory research reports on four case studies of completed implementations of IT service management using the process – based ITILv2 framework. The firms studied are from the Peruvian financial sector. Data were gained primarily through semi‐structured in‐depth interviews with managers involved in the implementation process. Compliance was measured using the itSMF self assessment questionnaire, which assesses the overall process capability.

Findings

This study finds that not all of the case firms took full advantage of change management practices while implementing the ITIL framework. The results show that the firms with a higher use of change management practices achieved higher levels of ITIL compliance. Additionally, change practices related to change preparation were used more frequently and fewer practices related to the implementation and consolidation stages were reported.

Originality/value

Few studies have examined change management practices in the context of ITIL implementation projects. This study also uses the levels of ITIL compliance as an outcome measure.

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Article
Publication date: 14 November 2016

Luiz Lima, Claudio Foffano Vasconcelos, Jose Simão and Helder Ferreira de Mendonça

The purpose of this paper is to analyze if the unconventional monetary policy, known as quantitative easing (QE) practiced by central banks in the USA, the UK, and Japan was…

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Abstract

Purpose

The purpose of this paper is to analyze if the unconventional monetary policy, known as quantitative easing (QE) practiced by central banks in the USA, the UK, and Japan was effective to increase the market share after subprime crisis.

Design/methodology/approach

In order to analyze the effect of the QE on the stock markets of the USA, the UK, and Japan, the authors use an ARDL model to find the long-run relationship among the variables.

Findings

The findings denote that the QE implemented by the central banks in the USA, Japan, and the UK had a positive impact on their stock markets.

Originality/value

The results of the paper give some new insights about the conduction of monetary policy when the interest rates are close to zero.

Details

Journal of Economic Studies, vol. 43 no. 6
Type: Research Article
ISSN: 0144-3585

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Article
Publication date: 1 March 2006

João Da Rocha Lima Júnior and Claudio Tavares De Alencar

The office market in São Paulo has been in recession since the year 2000. This situation came up due to two main factors: [i] the very aggressive attitude of developers during…

270

Abstract

The office market in São Paulo has been in recession since the year 2000. This situation came up due to two main factors: [i] the very aggressive attitude of developers during the period that comprises the year 1999 until 2000. At that time there was a very strong perception among investors that a new expansion era for new office buildings in São Paulo was about to begin and, moreover the Brazilian economy had started its recovery; [ii] The intense retraction of the Brazilian economy along with the political transition in 2002, which was mainly caused by the deterioration of the expectations in relation to the economic policies that would be performed by the new government.The recovery of the economic activity in the office building market firstly depends on the macroeconomic growth in Brazil and within the São Paulo metropolitan area. On the other hand, the expansion of the activity in the office buildings sector relies not only on the developers’ expectations of how and when the current vacant units will be rented, but also on the potential risk‐return composition of new buildings to be developed in the next years. This paper describes the economic scenario in which investment decisions to build new office buildings for rent in our local market are made and we also simulated both the necessary period of time for investments in the São Paulo office market to recover attractiveness and the time interval for the increase in the occupation rate absorb the actual vacant spaces. These simulations have taken place based on projections for the Brazilian GNP increase and they showed that for an annual increment of 4.5%, in 3 years could be reached both, attractiveness for new investment and occupation of vacant areas. For a 2.0% annual growth, the absorption of vacant spaces will take 4 years from now and new investment would be attractive only in 2012. Besides, we discuss the market prices fluctuations on the inflexion point where the transition from one phase of the real estate cycle (recession‐non attractiveness) to another (recovery‐attractiveness) occurs.

Details

Journal of Financial Management of Property and Construction, vol. 11 no. 1
Type: Research Article
ISSN: 1366-4387

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Article
Publication date: 7 June 2019

Tomás López-Guzmán, Jesús Claudio Pérez Gálvez, Franklin Cordova Buiza and Miguel Jesús Medina-Viruel

The purpose of this paper is to conduct an analysis of the relationships existing among three basic constructs in the visitor’s decision-making process (motivation and…

346

Abstract

Purpose

The purpose of this paper is to conduct an analysis of the relationships existing among three basic constructs in the visitor’s decision-making process (motivation and satisfaction) in a tourist destination that is a World Heritage Site, such as the city of Lima (Peru). Bearing in mind the perception of heritage by the foreign visitors, four types of tourists were determined: alternative tourists, cultural tourists, emotional tourists and heritage tourists.

Design/methodology/approach

This research uses the multivariate technique of grouping cases (K-means clusters) to analyse the similarity existing among the surveyed persons. From the groups or segments obtained, statistics and measurements of association were applied, which provide the information necessary to study the possible trends of association existing between variables from a table of bidimensional contingencies. In the same way, nonparametric statistical procedures were used (Kruskal–Wallis H test and the Mann–Whitney U test) with the aim of analysing significant differences among groups of the sample.

Findings

The results show the existence of four diverse motivational dimensions among the foreign tourists to visit Lima: hedonic, cultural, convenience and circumstantial. Of the four dimensions, the cultural aspect is the most relevant. The results show the existence of a specific Ibero-American heritage and cultural identity.

Originality/value

This paper contributes to the academic literature on the links of the tourist with the historical and monumental heritage location(s) visited by the tourist and the tourist’s behaviour while visiting the site. In fact, it is one of the first investigations carried out on this subject in Latin America.

Details

International Journal of Tourism Cities, vol. 5 no. 3
Type: Research Article
ISSN: 2056-5607

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Article
Publication date: 7 August 2017

Claudio Tavares de Alencar, João Rocha Lima and Eliane Monetti

The purpose of this paper is to simulate possoble scenarios of São Paulo’s office market recovering. In 2006, a previous paper that dealt with the same issue was published which…

147

Abstract

Purpose

The purpose of this paper is to simulate possoble scenarios of São Paulo’s office market recovering. In 2006, a previous paper that dealt with the same issue was published which the authors propose to analyse here. After eight years, the São Paulo office market is starting a new phase within its cycle. Then, the first part of this paper, as in Rocha-Lima and Alencar (2006), describes the economic scenario in which investment decisions are made for developing office buildings in the Brazilian market. Afterward, the authors simulated both the necessary period of time for investments in the São Paulo office market to recover attractiveness and time for the increase in the occupation rate to absorb the current vacant spaces.

Design/methodology/approach

These simulations were carried out using simple linear regressions models using the Brazilian gross domestic product (GDP) as explanatory variable to prices and vacancy rates dependent ones.

Findings

The authors have found that the vacant space can be fully re-occupied in the beginning of 2021 or mid of 2022, according to the GDP growth rate, and, from this moment on, the demand for new spaces may grow, and, moreover around 2019, investments may become attractive again in this market.

Originality/value

This paper offers an alternative approach for estimating office building scenarios, especially when the database of the market is scarce. It also permits to evaluate an investment strategy for emerging markets within next years, particularly in São Paulo, Brazil.

Details

Journal of Financial Management of Property and Construction, vol. 22 no. 2
Type: Research Article
ISSN: 1366-4387

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Article
Publication date: 17 August 2021

Andrés Regal Ludowieg, Claudio Ortega, Andrés Bronfman, Michelle Rodriguez Serra and Mario Chong

The purpose of this paper is to present a spatial decision support system (SDSS) to be used by the local authorities of a city in the planning and response phase of a disaster…

247

Abstract

Purpose

The purpose of this paper is to present a spatial decision support system (SDSS) to be used by the local authorities of a city in the planning and response phase of a disaster. The SDSS focuses on the management of public spaces as a resource to increase a vulnerable population’s accessibility to essential goods and services. Using a web-based platform, the SDSS would support data-driven decisions, especially for cases such as the COVID-19 pandemic which requires special care in quarantine situations (which imply walking access instead of by other means of transport).

Design/methodology/approach

This paper proposes a methodology to create a web-SDSS to manage public spaces in the planning and response phase of a disaster to increase the access to essential goods and services. Using a regular polygon grid, a city is partitioned into spatial units that aggregate spatial data from open and proprietary sources. The polygon grid is then used to compute accessibility, vulnerability and population density indicators using spatial analysis. Finally, a facility location problem is formulated and solved to provide decision-makers with an adaptive selection of public spaces given their indicators of choice.

Findings

The design and implementation of the methodology resulted in a granular representation of the city of Lima, Peru, in terms of population density, accessibility and vulnerability. Using these indicators, the SDSS was deployed as a web application that allowed decision-makers to explore different solutions to a facility location model within their districts, as well as visualizing the indicators computed for the hexagons that covered the district’s area. By performing tests with different local authorities, improvements were suggested to support a more general set of decisions and the key indicators to use in the SDSS were determined.

Originality/value

This paper, following the literature gap, is the first of its kind that presents an SDSS focused on increasing access to essential goods and services using public spaces and has had a successful response from local authorities with different backgrounds regarding the integration into their decision-making process.

Details

Journal of Humanitarian Logistics and Supply Chain Management, vol. 12 no. 2
Type: Research Article
ISSN: 2042-6747

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Article
Publication date: 6 December 2024

Adilson Carlos Yoshikuni, Rajeev Dwivedi, Claudio Parisi, Jose Carlos Tiomatsu Oyadomari and Ronaldo Gomes Dultra-de-Lima

Enterprise Risk Management (ERM) is a strategy and approach that enables organizations to manage risk strategically from a systems standpoint. The ERM assists businesses in…

70

Abstract

Purpose

Enterprise Risk Management (ERM) is a strategy and approach that enables organizations to manage risk strategically from a systems standpoint. The ERM assists businesses in structuring their systems to generate strategic flexibility (SF), which leads to increased firm performance (FP) through strategic enterprise management (IS-SEM) and strategic momentum (SM).

Design/methodology/approach

The study is based on data gathered in Brazil and India. The complex link was discovered using partial least square structural equation modeling (PLS-SEM) using 330 Brazilian and Indian sample sizes.

Findings

The findings show that ERM influences IS-SEM and SM, which improves SF and FP. Furthermore, the study claims that IS-SEM can help improve strategic momentum and flexibility in the face of environmental uncertainty (ENU). Thus, it indicated that specific combinations of ENU connected with ERM and IS-SEM lead to obtaining high and extremely high levels fuzzy set qualitative comparative analysis (fsQCA) post hoc analysis of strategic momentum and flexibility.

Practical implications

The findings help executives understand how ERM and accounting information systems (AIS) can help achieve SM and SF, hence promoting FP in situation specific ENU setups in developing economies. The findings enhance executives' comprehension of how ERM and IS-SEM can significantly contribute to achieving SM and SF, thereby driving FP in the situation-specific ENU configurations in developing economies.

Originality/value

Research indicated that specific combinations of (ENU) connected with ERM and IS-SEM lead to obtaining high and extremely high levels fuzzy set qualitative comparative analysis (fsQCA) post hoc analysis of strategic momentum and flexibility.

Details

Journal of Enterprise Information Management, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 1741-0398

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Article
Publication date: 12 October 2023

Christian Fernando Libaque-Saenz, Claudio Ortega, Michelle Rodriguez-Serra, Mario Chong and Salvador Lopez-Puente-de-la-Vega

Although e-wallet adoption has grown in recent years, there are some countries like Peru with low penetration rates. Contrary to prior studies that focused on customers' adoption…

516

Abstract

Purpose

Although e-wallet adoption has grown in recent years, there are some countries like Peru with low penetration rates. Contrary to prior studies that focused on customers' adoption of e-wallets, this study focuses on merchants' adoption to fully understand the use of these services. Additionally, considering that e-wallets are two-sided markets with the co-existence of two distinct economic agents (customer and merchants) interacting through these platforms, this study is the first to assess the dynamics of inter-side benefits from the merchants' perspective. Finally, interoperability was also included to determine its role in countries where the interaction between different e-wallets is limited.

Design/methodology/approach

Based on two-sided markets and social cognitive theory, a model was proposed including merchants' perceived benefits associated with the use of e-wallets, for them and for their customers (inter-side). Additionally, technical issues such as interoperability were measured. Data were collected from nanostore owners in Lima in 2022. A structural equation modeling technique was used to determine the impact of both types of benefits and technical features on merchants' adoption of e-wallets. Finally, a polynomial regression with response surface methodology was used to assess the interaction of the benefits for both sides of the platform from the merchants' perspective.

Findings

The two-sided-market features of e-wallets were validated. From merchants' view, the use of these platforms is the result of balancing the benefits for them and for their customers, and the interaction between these two types of benefits varies according to the socio-economic level in which the nanostore operates. Additionally, interoperability was found to be important for merchants, so future policies should commit to achieve an ecosystem that facilitates the interoperability not only among e-wallets but also between e-wallets and third-party services. Finally, since service availability is also important for merchants, e-wallet providers should invest in improving their infrastructure's scalability.

Originality/value

Prior studies have mainly focused on the customer side of e-wallets, with little research about the adoption of digital payment methods by the merchant side. In addition, no study has focused on the effect of one of the sides of the platform on the other side (inter-side benefits) when adopting these services. Finally, the effect of interoperability across platforms has not been addressed in detail yet. This study aims to fill these gaps by proposing a framework to understand the adoption of these services by merchants in terms of inter-side benefits and technical issues.

Details

Industrial Management & Data Systems, vol. 124 no. 1
Type: Research Article
ISSN: 0263-5577

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Article
Publication date: 23 July 2019

Ludmila Bandeira Lima Barros, Martin de La Martinière Petroll, Cláudio Damacena and Marc Knoppe

The purpose of this paper is to investigate the influence of store atmosphere on consumers’ positive emotional responses and impulsive purchase behaviour. In addition, it analyses…

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Abstract

Purpose

The purpose of this paper is to investigate the influence of store atmosphere on consumers’ positive emotional responses and impulsive purchase behaviour. In addition, it analyses the moderating role of culture characteristics and situational variables on this influence.

Design/methodology/approach

The study carried out a quantitative face-to-face on-site survey of a retail fashion brand in two countries, Brazil and Germany. This paper extended the original model of Jung Chang et al. (2014) based on environment, design and social features (staff) by adding store atmosphere factors such as layout, music and lighting (Mohan et al., 2013), thereby defining store atmosphere as the way customers perceive and experience the combination of all those factors.

Findings

Data analysis from 313 consumers by structural equation modelling (PLS–SEM) showed that most factors influence consumers’ positive emotional responses, but no significant difference between countries. However, the effect of emotions on impulse purchase behaviour is stronger among collectivist consumers (Brazil) than among individualists (Germany).

Originality/value

This study sheds light on the links between store atmosphere and retail market in Brazil and Germany, framing its conclusions in the context of a comparison between cultures. The paper extends the growing research in the area by exploring the moderating role of the individualism–collectivism dimension of national culture in consumer buying behaviour by comparing the strength of various relationships across shoppers from individualistic vs collectivistic cultures.

Details

International Journal of Retail & Distribution Management, vol. 47 no. 8
Type: Research Article
ISSN: 0959-0552

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