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Article

Ramón Benito Infante, Omar E. Garcia, Andrés Carmona and Carlos J. Rivera

Brush border intestinal disaccharidases (maltase, sucrase and lactase) play an important role in carbohydrate assimilation. These enzymes are located on the brush border…

Abstract

Purpose

Brush border intestinal disaccharidases (maltase, sucrase and lactase) play an important role in carbohydrate assimilation. These enzymes are located on the brush border and may interact with legume seed components such as dietary fiber and polyphenols. The purpose of this paper is to assess the effect of legume dietary fiber on rat disaccharidase in vitro.

Design/methodology/approach

Rat intestinal disaccharidases from Sprague‐Dawley rats fed a basal diet for 21 days were partially purified from intestinal scrapings. Enzyme activities were tested in vitro in the absence and presence of total dietary fiber isolated from Phaseolus vulgaris (Varieties Tacarigua and Montalbán) and Vigna unguiculata (Varieties Unare and Tuy) seeds that differ in fiber and polyphenol content. Dietary fiber was purified using the AOAC method.

Findings

The specific activities of the intestinal brush‐border disaccharidases from rats fed the basal diet were 3.29 ± 0.06, 3.13 ± 0.62 and 0.18 ± 0.04 umoles of glucose released/mg of protein/min for maltase, sucrase and lactase, respectively. Total dietary fiber from the legume tested inhibited both sucrase and maltase. Fiber from the four seeds tested affected sucrase similarly (average inhibition 35 per cent) whereas the fiber residue from P. vulgaris Montalbán was more effective on maltase (26.7 per cent) than that from P. vulgaris Tacarigua (12.2 per cent). Effect of V. unguiculata fibers on maltase was similar and somewhat in between those from P. vulgaris.

Originality/value

These results suggest that dietary fiber, as well as other factors from beans with anti‐physiological effect, such as condensed tannins and fitic acid possibly associated with the dietary fiber, may impair carbohydrate availability and may contribute to the low glycemic index proper of these foodstuffs.

Details

Nutrition & Food Science, vol. 38 no. 4
Type: Research Article
ISSN: 0034-6659

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Article

Daniela Diaz-Alonso, Mario Moreno-Moreno, Carlos Zuñiga, Joel Molina, Wilfrido Calleja, Juan Carlos Cisneros, Luis Niño de Rivera, Volodymir Ponomaryov, Felix Gil, Angel Guillen and Efrain Rubio

This paper aims to purpose the new design and fabrication scheme of Touch Mode Capacitive Pressure Sensor (TMCPS), which can be used in a wireless integrated resistor…

Abstract

Purpose

This paper aims to purpose the new design and fabrication scheme of Touch Mode Capacitive Pressure Sensor (TMCPS), which can be used in a wireless integrated resistor, inductor and capacitor circuit for monitoring pressure in biomedical applications.

Design/methodology/approach

This study focuses on the design, simulation and fabrication of dynamic capacitors, based on surface micromachining using polysilicon or aluminum films as the top electrode, both structural materials are capped with a 1.5 μm-thick polyimide film.

Findings

The design of microstructures using a composite model fits perfectly the preset mechanical behavior. After the full fabrication, the dynamic capacitors show complete mechanical flexibility and stability.

Originality/value

The novelty of the method presented in this study includes two important aspects: first, the capacitors are designed as a planar cavity within a rigid frame, where two walls contain channels which allow for the etching of the sacrificial material. Second, the electromechanical structures are designed using a composite model that includes a polyimide film capping for a precise pressure sensing, which also protects the internal cavity and, at the same time, provides full biocompatibility.

Details

Microelectronics International, vol. 33 no. 2
Type: Research Article
ISSN: 1356-5362

Keywords

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Article

Kendra Dyanne Rivera and Sarah J. Tracy

“Dirty work” is an embodied, emotional activity, and may best be expressed through narrative thick description. The purpose of this paper is to employ creative analytic…

Abstract

Purpose

“Dirty work” is an embodied, emotional activity, and may best be expressed through narrative thick description. The purpose of this paper is to employ creative analytic techniques through a “messy text” for better understanding the tacit knowledge and emotionality of dirty work and dirty research. The vignettes, based upon ethnographic fieldwork with US Border Patrol agents, viscerally reveal the embodied emotions of dirty work and doing dirty research.

Design/methodology/approach

The research draws on a two and a half year ethnography of the US Border Patrol in which the first author engaged in participant observation, shadowing, and interviews. Based upon the iterative data analysis and narrative writing techniques using verbatim quotations and field data, the essay provides a series of vignettes that explore the multi-faceted feelings of dirty work.

Findings

Tacit knowledge about dirty work is unmasked and known through experiences of the body as well as emotional reactions to the scene. A table listing the emotions that emerged in these stories supplements the narrative text. The analysis shows how communication about emotions provides a sense-making tool that, in turn, elucidates both the challenges and the potential highlights of doing dirty work. In particular, findings suggest that emotional ambiguity the “moral emotions” of guilt and shame may serve as sense-making tools that can help in ethical decision making and a re-framing of challenging situations.

Originality/value

A field immersion alongside dirty workers, coupled with a creative writing approach, provides access to the fleeting, embodied, and fragmented nature of tacit knowledge – answering the questions of what dirty work feels like. The essay provides a behind the scenes exploration of US Border Patrol agents – a profession that is alternately stigmatized or hidden from public view. Finally, the piece provides a self-reflexive account of the messy realities of conducting “dirty research” in a way that is open ended and embodied.

Details

Qualitative Research in Organizations and Management: An International Journal, vol. 9 no. 3
Type: Research Article
ISSN: 1746-5648

Keywords

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Article

Nora Lado, Albert Maydeu‐Olivares and Jaime Rivera

Most researchers have studied economic performance linked to market orientation, while a lesser interest has been shown in validating this construct’s measure. We present…

Abstract

Most researchers have studied economic performance linked to market orientation, while a lesser interest has been shown in validating this construct’s measure. We present a study of market orientation designed to obtain a valid measure of the market orientation construct. After presenting a theoretical model of market orientation, it is applied to investigate the usefulness of this construct in insurance companies of two European countries. Key features of the research methodology include several rounds of pretesting, multiple informant assessment, and a covariance structure procedure to show the structural validity of a measure of market orientation. The results show that the measure proposed is represented by a factorial structure that can be interpreted as an overall market orientation factor in both populations and a country‐specific additional factor.

Details

European Journal of Marketing, vol. 32 no. 1/2
Type: Research Article
ISSN: 0309-0566

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Article

Carlos Enrique Torres-Aguilar, Pedro Moreno-Bernal, Jesús Xamán, Ivett Zavala Guillen and Irving Osiris Hernández-López

This paper aims to present an evolutionary algorithm (EA) to accelerate the convergence for the radiative transfer equation (RTE) numerical solution using high-order and…

Abstract

Purpose

This paper aims to present an evolutionary algorithm (EA) to accelerate the convergence for the radiative transfer equation (RTE) numerical solution using high-order and high-resolution schemes by the relaxation coefficients optimization.

Design methodology/approach

The objective function minimizes the residual value difference between iterations in each control volume until its difference is lower than the convergence criterion. The EA approach is evaluated in two configurations, a two-dimensional cavity with scattering media and absorbing media.

Findings

Experimental results show the capacity to obtain the numerical solution for both cases on all interpolation schemes tested by the EA approach. The EA approach reduces CPU time for the RTE numerical solution using SUPERBEE, SWEBY and MUSCL schemes until 97% and 135% in scattering and absorbing media cases, respectively. The relaxation coefficients optimized every two numerical solution iterations achieve a significant reduction of the CPU time compared to the deferred correction procedure with fixed relaxation coefficients.

Originality/value

The proposed EA approach for the RTE numerical solution effectively reduces the CPU time compared to the DC procedure with fixed relaxation coefficients.

Details

Engineering Computations, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 0264-4401

Keywords

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Article

Juan Manuel Bruno, Francisco J. Sarabia-Sanchez and Enrique Carlos Bianchi

This study verifies the influence of the dimensions of corporate social responsibility (CSR) practices and consumer involvement on the identification of the individual…

Abstract

Purpose

This study verifies the influence of the dimensions of corporate social responsibility (CSR) practices and consumer involvement on the identification of the individual with the company and the corporate reputation, moderated by the product category.

Design/methodology/approach

A covariance-based structural equation modelling is used to test the model, using a sample of 568 Argentine consumers. A multigroup analysis is employed to assess the moderating effect of the product category.

Findings

CSR practices have heterogeneous influence based on their dimension, and this influence is moderated by the product category. Accordingly, environmental practices promote consumer identification with the company, whereas those economically oriented have a direct influence on reputation. In contrast, social practices contribute to reputation if they are connected to the business model.

Research limitations/implications

The study is focussed on Argentina, analysing two product categories (laptops and financial services for final consumers) and using a large, but not strictly random, sample. In order to mainstream the results, it would be relevant to replicate the proposed model in other countries and with other product categories.

Originality/value

It provides information about the perception of consumers regarding the CSR practices from a multi-dimensional perspective, since they have an uneven effect on identification of consumer with the company and corporate reputation due to the moderating effect of the product category. The findings of this study may be relevant for managers of technology and banking service companies.

Propósito

El presente estudio comprueba la influencia de las dimensiones de las prácticas de responsabilidad social empresarial y de la implicación del consumidor sobre la identificación del individuo con la empresa y sobre la reputación empresarial, moderadas por la categoría de producto.

Metodología

Se aplican ecuaciones estructurales basadas en covarianzas para contrastar el modelo, empleando una muestra de 568 consumidores argentinos. Se efectúa un análisis multigrupo para analizar el efecto moderador de la categoría de producto.

Hallazgos

Las prácticas de RSE tienen influencia heterogénea según su dimensión, moderada la influencia por la categoría de producto. Así, las prácticas ambientales promueven la identificación del consumidor con la empresa mientras que aquéllas con orientación económica influyen directamente sobre la reputación. Por el contrario, las prácticas sociales contribuyen a la reputación si están vinculadas al modelo de negocio.

Limitaciones de la investigación

El estudio se ha focalizado en Argentina, analizando dos categorías de producto (computadoras portátiles y servicios financieros para consumidor final) y usando una muestra elevada pero no estrictamente aleatoria. Para generalizar los resultados sería relevante replicar el modelo planteado en otros países y otras categorías de producto.

Originalidad

Proporciona información sobre la percepción de los consumidores respecto de las prácticas de RSE desde una perspectiva multidimensional, pues éstas tienen efecto dispar sobre la identificación del consumidor con la empresa y la reputación empresarial dado el efecto moderador de la categoría de producto. Los hallazgos de este estudio pueden ser relevantes para gerentes de empresas de tecnología y de servicios bancarios.

Details

Academia Revista Latinoamericana de Administración, vol. 33 no. 3/4
Type: Research Article
ISSN: 1012-8255

Keywords

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Article

Urbi Garay

The purpose of this paper is to present the progress and trends of the literature on art as an investment and to outline potential research lines to be developed.

Abstract

Objective

The purpose of this paper is to present the progress and trends of the literature on art as an investment and to outline potential research lines to be developed.

Design/methodology/approach

This work gathers, analyses and critically discusses the attributes of investments in art in general, and in Latin American art in particular.

Findings

Most studies report that art (art in general, and Latin American in particular) has offered relatively low but positive real returns, which have tended to be below those offered by stocks and similar to those realized by bonds. Art has a low correlation with other investments.

Research limitations and implications

The literature on the attributes of Latin American art as an investment is limited and new research would help to close the knowledge gap with respect to this segment of the art market as it continues to grow.

Practical implications

Similarly to the research carried out into other segments of the art market, studies on Latin American art suggest that the works of art are worth more, ceteris paribus: the more renowned the artist, the larger the work, whether they were executed in oil, and if they were auctioned at Sotheby’s or Christie’s. The paper also details a series of practical implications for those who participate in the art market.

Originality/value

To the best of the authors’ knowledge, this is the first exhaustive review of the literature on the attributes of Latin American art as an investment. The findings of this study are useful for academics, art collectors, auction houses, gallerists and others who take part in the arts market.

Propósito

Presentar los avances y las tendencias de la literatura sobre el arte como inversión, y delinear líneas de investigación a ser desarrolladas.

Diseño/metodología/enfoque

Este trabajo reúne, analiza y discute críticamente los atributos de inversión del arte, en general, y latinoamericano, en particular.

Hallazgos

La mayoría de los estudios reportan que el arte (tanto el arte, en general, como el arte latinoamericano, en particular) ha ofrecido rendimientos reales positivos, aunque relativamente bajos, los cuales tienden a ser inferiores de los de las acciones y a ser similares a los de los bonos. El arte tiene una baja correlación con otras inversiones.

Limitaciones e implicaciones de la investigación

La literatura sobre los atributos del arte latinoamericano como inversión es limitada. Es de esperar que nuevas investigaciones permitan ir cerrando la brecha del conocimiento con respecto a esta parte del mercado del arte a la par que éste continúe creciendo.

Implicaciones prácticas

Los estudios de arte latinoamericano sugieren, similar a las investigaciones sobre otros segmentos del mercado del arte, que las obras de arte valen más, ceteris paribus: cuando el artista es más reputado, a medida que el área de las obras es mayor, si han sido ejecutadas en óleo, y cuando son subastadas en las casas de subastas Sotheby’s o Christie’s. En el trabajo se detallan, además, una serie de implicaciones prácticas para los participantes del mercado de arte.

Originalidad/valor

Hasta donde se ha podido comprobar, esta es la primera revisión exhaustiva acerca de los atributos del arte latinoamericano como inversión. Los resultados de esta investigación son de utilidad para: académicos, coleccionistas de arte, casas de subastas, galeristas, y demás participantes en el mercado del arte.

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Article

Gorete Dinis, Zélia Breda, Carlos Costa and Osvaldo Pacheco

This paper aims to conduct a review of the literature published, between 2006 and 2018, that used search engine data on tourism and hospitality research, namely, Google…

Abstract

Purpose

This paper aims to conduct a review of the literature published, between 2006 and 2018, that used search engine data on tourism and hospitality research, namely, Google Insights for Search and Google Trends. More specifically, it intends to identify the purpose and context of the data use, ascertaining the main findings and reviewing the methodological approaches.

Design/methodology/approach

A systematic literature review of Scopus indexed research has been carried out. Given the novelty of search engine data use in tourism and hospitality research and the relatively low number of search results in Scopus, other databases were used to broaden the scope of analysis, namely, EBSCO and Google Scholar. The papers selected were subjected to content and statistical analyses.

Findings

Google Trends data use in tourism and hospitality research has increased significantly from 2012 to 2017, mainly for tourism forecasting/nowcasting; knowing the interest of users’ searches for tourist attractions or destinations; showing the relationship between the official tourism statistics and the search volume index of Google Trends; and estimating the effect of one event on tourism demand. The categories and search terms used vary with the purpose of the study; however, they mostly focus on the travel category and use the country as the search term.

Originality/value

Google Trends has been increasingly used in research publications in tourism and hospitality, but the range of its applications and methods used has not yet been reviewed. Therefore, a systematic review of the existing literature increases awareness of its potential uses in tourism and hospitality research and facilitates a better understanding of its strengths and weaknesses as a research tool.

研究目的

本文回顾2006年至2018年发表文献使用酒店旅游相关的搜索引擎数据, 即Google Insights for Search 以及Google Trends。确切地说, 本文旨在研究数据使用目的和背景, 归纳主要研究成果和研究方法。

研究设计/方法/途径

本文采用Scopus索引, 由于旅游酒店领域使用搜索引擎数据的文献较少, Scopus搜索结果样本量较低, 本文扩展到其他数据库, 即EBSCO以及Google Scholar。选定的样本文献采用文本分析和统计分析法。

研究结果

旅游酒店领域中对Google Trends数据使用的增加主要集中在2012年到2017年, 主要研究领域有(1)旅游预测/即时预报;(2)了解用户搜索旅游景点或目的地的需求;(3)官方旅游数据和Google Trends搜索量索引之间的关系;以及(4)评估大事件对旅游需求的影响。文献归类和搜索名词根据研究目的而不同。然而, 大多数文章使用‘旅游’归类以及使用国家作为搜索关键词。

研究原创性/价值

Google Trends在酒店旅游领域研究中的使用逐渐增加, 但是据作者所知, 其应用的范畴和方法仍处在起步阶段。因此, 对现有文献的系统回顾可以提高对其在旅游酒店领域中应用的认知, 并且本文结果使其作为研究工具的优劣分析更深理解。

关键词

Google Trends, Google insights for search, 搜索引擎数据, 旅游酒店研究, 系统文献回顾

Details

Journal of Hospitality and Tourism Technology, vol. 10 no. 4
Type: Research Article
ISSN: 1757-9880

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Article

Juan A. Marin-Garcia, Amable Juarez-Tarraga and Cristina Santandreu-Mascarell

The purpose of this paper is to perform a context analysis about a specific Kaizen program, suggestion systems in permanent teams, and identified the barriers and…

Abstract

Purpose

The purpose of this paper is to perform a context analysis about a specific Kaizen program, suggestion systems in permanent teams, and identified the barriers and facilitators that companies encounter while implementing them from the workers’ perspective.

Design/methodology/approach

The authors applied an inductive method, the Grounded Theory, to develop a specific context theory using the information that emerged from a convenience sample of 182 workers in several countries.

Findings

The facilitators and barriers identified for the workers in the field study are aligned with those identified in previous studies, generally obtained using information provided by managers. The methodology enabled us to identify the relationships between them and their level of relevance.

Research limitations/implications

The main limitations were linked with the source of the data as the authors worked with a convenience sample and only analyzed the information provided by the workers.

Practical implications

The identified facilitators, their relationships and their relevance, contribute to understand the functioning phenomena of suggestion systems in permanent teams to facilitate organizations using this continuous improvement program more effectively.

Originality/value

The originality of this study, apart from identifying facilitators from the workers’ perspective, is that the used method enabled us to identify the relationships between them and know how the operators perceived their relevance.

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Book part

Cristina Zurbriggen

Governance is becoming an increasingly important concept in European theoretical debates and in political practice as a new way to manage public policies, since the public…

Abstract

Governance is becoming an increasingly important concept in European theoretical debates and in political practice as a new way to manage public policies, since the public sector reforms in the 1980s. However, the debate in Latin America has different characteristics than in Europe, so it is necessary to provide a critical review of the proposed agenda for the transformation of the state in the region, and of the transfer of the concept of governance by multilateral agencies. To understand these changes, this chapter examines three key areas of reforms in Latin America and the privatization of public services, new social policy proposals, and the decentralization process. This will help us understand the tension between normative models and specific patterns of governance that prevail in Latin America.

Details

The Emerald Handbook of Public Administration in Latin America
Type: Book
ISBN: 978-1-83982-677-1

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