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1 – 10 of 31Jose-Gonzalo Gonzalez-Rodriguez, Andres Carmona Hernandez, E. Vázquez-Vélez, A. Contreras-Cuevas and Jorge Uruchurtu Chavarin
This paper aims to use an imidazole-based n-ionic Gemini surfactant derived from palm oil to inhibit the sulfide stress corrosion cracking of a supermartensitic stainless steel.
Abstract
Purpose
This paper aims to use an imidazole-based n-ionic Gemini surfactant derived from palm oil to inhibit the sulfide stress corrosion cracking of a supermartensitic stainless steel.
Design/methodology/approach
The slow strain rate testing technique, hydrogen permeation tests and potentiodynamic polarization curves have been used.
Findings
Addition of the inhibitor below the critical micelle concentration (CMC) decreased the corrosion current density (icorr), but not enough to avoid embrittlement due to the entry of hydrogen into the steel. Instead, the addition of the inhibitor close to the CMC decreased the icorr, suppressed the entry of hydrogen and inhibited the sulfide stress cracking of steel. Finally, the addition of inhibitor above the CMC led to a slight increase of icorr and promoted localized corrosion, however, the sulfide stress cracking of steel was inhibited.
Originality/value
A green sulfide stress corrosion cracking inhibitor of a supermartensitic stainless steel has been obtained.
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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 and may…
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.
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Liang Ma, Qiang Wang, Haini Yang, Da Quan Zhang and Wei Wu
The aim of this paper is to solve the toxic and harmful problems caused by traditional volatile corrosion inhibitor (VCI) and to analyze the effect of the layered structure on the…
Abstract
Purpose
The aim of this paper is to solve the toxic and harmful problems caused by traditional volatile corrosion inhibitor (VCI) and to analyze the effect of the layered structure on the enhancement of the volatile corrosion inhibition prevention performance of amino acids.
Design/methodology/approach
The carbon dots-montmorillonite (DMT) hybrid material is prepared via hydrothermal process. The effect of the DMT-modified alanine as VCI for mild steel is investigated by volatile inhibition sieve test, volatile corrosion inhibition ability test, electrochemical measurement and surface analysis technology. It demonstrates that the DMT hybrid materials can improve the ability of alanine to protect mild steel against atmospheric corrosion effectively. The presence of carbon dots enlarges the interlamellar spacing of montmorillonite and allows better dispersion of alanine. The DMT-modified alanine has higher volatilization ability and an excellent corrosion inhibition of 85.3% for mild steel.
Findings
The DMT hybrid material provides a good template for the distribution of VCI, which can effectively improve the vapor-phase antirust property of VCI.
Research limitations/implications
The increased volatilization rate also means increased VCI consumption and higher costs.
Practical implications
Provides a new way of thinking to replace the traditional toxic and harmful VCI.
Originality/value
For the first time, amino acids are combined with nano laminar structures, which are used to solve the problem of difficult volatilization of amino acids.
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Dennis M. Lopez, Michael A. Schuldt and Jose G. Vega
The purpose of this study is to examine the association between auditor industry specialization and accounting quality in the European Union (EU).
Abstract
Purpose
The purpose of this study is to examine the association between auditor industry specialization and accounting quality in the European Union (EU).
Design/methodology/approach
This study employs a difference-in-differences design and explores audit quality from different industry specialist perspectives and different accounting standard regimes. Specifically, this study examines accounting quality among audits performed by non-industry specialists, EU member country-level industry specialists (EUM-level), EU community-level industry specialists (EUC-level), as well as joint industry specialists.
Findings
This study finds evidence of an improvement in accounting quality among audits performed by non-industry specialists post-IFRS. There is also evidence of an improvement in accounting quality among audits performed by EUC-level industry specialists post-IFRS. In addition, accounting quality among audits performed by EUM-level industry specialists seems to be greater than that of audits performed by non-industry specialists in either the pre-IFRS period or the post-IFRS period. Overall, the mandatory adoption of IFRS in the EU appears to be associated with an improvement in accounting quality among some auditor groups.
Research limitations/implications
Industry specialization and accounting quality are not directly observable constructs; this study inevitably employs proxy measures for both. The findings of this study are location-specific and apply to mandatory IFRS adopters only.
Practical implications
This study informs regulators with respect to the importance of industry specialist auditors and financial reporting quality, particularly within the context of the EU. The findings suggest that industry specialists were a significant accounting quality determinant during the mandatory adoption of IFRS. The findings have implications for regulators in the EU and beyond.
Originality/value
This study is among the first to investigate the impact of auditor specialization on accounting quality in the EU, particularly in connection with the adoption of IFRS.
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Rocío Ortiz, Juan Manuel Macias-Bernal and Pilar Ortiz
The purpose of this paper is to present research on vulnerability and service life indexes applied to cultural heritage buildings. The construction and rehabilitation industry is…
Abstract
Purpose
The purpose of this paper is to present research on vulnerability and service life indexes applied to cultural heritage buildings. The construction and rehabilitation industry is concerned with the maintenance of monuments and reducing the economic costs of urgent interventions by taking preventive conservation action in historic cities. By applying a vulnerability index or analyzing the service life of buildings, it is possible to reduce risk and optimize the identification, evaluation and prioritization of urgent monument restoration tasks in a city or a region to establish preventive conservation policies.
Design/methodology/approach
This research sets out the concepts of vulnerability and service life, focusing on their methodologies in comparison with other techniques for building diagnosis, discussing the differences between indexes that measure the vulnerability and service life of buildings.
Findings
The vulnerability of three churches in Seville (Spain) was studied by means of their vulnerability index, based on Delphi analysis, and the service life of these buildings was also assessed, based on artificial intelligence tools. Delphi and artificial intelligence tools allow us to compare and dovetail different scenarios and expert opinions. The degree of each monument’s conservation is defined as its vulnerability index, which is an indirect function of deterioration levels. The service life of buildings, on the other hand, includes the assessment of vulnerability and hazards.
Practical implications
This study is useful for stakeholders, including small and medium enterprises (SMEs) and policymakers, as an important reference on diagnosis, including updated, inexpensive and sustainable methodologies to manage the conservation of monuments, which are easy to implement in developed and developing countries. The application of vulnerability and/or service life indicators is crucial to ensuring the sustainability and improvement of maintenance carried out on cultural heritage buildings.
Originality/value
This study details new approaches based on artificial intelligence and Delphi analysis to prioritize preventive conservation actions in a city or region.
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Osvaldo Hernández, Leila Regina Durán, Andrés Fresno and María Fernanda Chamorro
In response to the challenges posed by the social environment, numerous individuals with autism use coping strategies, engaging in a phenomenon known as “camouflaging” to mask…
Abstract
Purpose
In response to the challenges posed by the social environment, numerous individuals with autism use coping strategies, engaging in a phenomenon known as “camouflaging” to mask their distinctive traits. Despite the growing attention directed toward this area of study, to date, there are no bibliometric studies delineating the evolution of this research theme. This study aims to analyze scientific research on camouflage and the autistic spectrum published in Web of Science (WoS).
Design/methodology/approach
Articles on camouflage and autism were retrieved from the WoS. The advanced search interface used was “Title, Abstract, Keywords (autistic OR asperger syndrome OR Autism OR ASD AND camouflage OR camouflaging AND Masking).” The analysis and visualization of the selected records and their data were carried out using MS Excel (v16.0) and Biblioshiny (v2.0, R package).
Findings
Following the selection process, a total of 70 articles were included. Notably, the UK emerged as the leading contributor in terms of the number of published articles. Prominent authors in this domain included William Mandy, Laura Hull and Meng-Chuan Lai, who exhibited the highest number of published articles and citations. The Journal of Autism and Developmental Disorders stood out as the most prolific journal. Predominant research themes encompassed camouflage (and its synonyms, masking or compensation), gender differences and mental health.
Originality/value
This study contributes to existing knowledge on this topic, as well as identifying new areas of research related to autism and camouflage. Moreover, it serves as a valuable resource for health-care professionals, including physicians and clinical psychologists, who may seek to augment their understanding and proficiency in the field.
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Julián Martínez-Vargas, Pedro Carmona and Pol Torrelles
The purpose of this paper is to study the influence of different quantitative (traditionally used) and qualitative variables, such as the possible negative effect in determined…
Abstract
Purpose
The purpose of this paper is to study the influence of different quantitative (traditionally used) and qualitative variables, such as the possible negative effect in determined periods of certain socio-political factors on share price formation.
Design/methodology/approach
We first analyse descriptively the evolution of the Ibex-35 in recent years and compare it with other international benchmark indices. Bellow, two techniques have been compared: a classic linear regression statistical model (GLM) and a method based on machine learning techniques called Extreme Gradient Boosting (XGBoost).
Findings
XGBoost yields a very accurate market value prediction model that clearly outperforms the other, with a coefficient of determination close to 90%, calculated on validation sets.
Practical implications
According to our analysis, individual accounts are equally or more important than consolidated information in predicting the behaviour of share prices. This would justify Spain maintaining the obligation to present individual interim financial statements, which does not happen in other European Union countries because IAS 34 only stipulates consolidated interim financial statements.
Social implications
The descriptive analysis allows us to see how the Ibex-35 has moved away from international trends, especially in periods in which some relevant socio-political events occurred, such as the independence referendum in Catalonia, the double elections of 2019 or the early handling of the Covid-19 pandemic in 2020.
Originality/value
Compared to other variables, the XGBoost model assigns little importance to socio-political factors when it comes to share price formation; however, this model explains 89.33% of its variance.
Propósito
El propósito de este artículo es estudiar la influencia de diferentes variables cuantitativas (tradicionalmente usadas) y cualitativas, como la posible influencia negativa en determinados períodos de ciertos factores sociopolíticos, sobre la formación del precio de.
Diseño/metodología/enfoque
Primero analizamos de forma descriptiva la evolución del Ibex-35 en los últimos años y la comparamos con la de otros índices internacionales de referencia. A continuación, se han contrastado dos técnicas: un modelo estadístico clásico de regresión lineal (GLM) y un método basado en el aprendizaje automático denominado Extreme Gradient Boosting (XGBoost).
Resultados
XGBoost nos permite obtener un modelo de predicción del valor de mercado muy preciso y claramente superior al otro, con un coeficiente de determinación cercano al 90%, calculado sobre las muestras de validación.
Implicaciones prácticas
De acuerdo con nuestro análisis, la información contable individual es igual o más importante que la consolidada para predecir el comportamiento del precio de las acciones. Esto justificaría que España mantenga la obligación de presentar estados financieros intermedios individuales, lo que no ocurre en otros países de la Unión Europea porque la NIC 34 solo obliga a realizar estados financieros intermedios consolidados.
Implicaciones sociales
El análisis descriptivo permite ver cómo el Ibex-35 se ha alejado de las tendencias internacionales, especialmente en periodos en los que se produjo algún hecho sociopolítico relevante, como el referéndum de autodeterminación de Cataluña, el doble proceso electoral de 2019 o la gestión inicial de la pandemia generada por el Covid-19.
Originalidad/valor
En comparación con otras variables, el modelo XGBoost asigna poca importancia a los factores sociopolíticos cuando se trata de la formación del precio de las acciones; sin embargo, este modelo explica el 89.33% de su varianza.
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This article illustrates the significance of pathways in cultural landscapes. It does so via an in-depth analysis at the paths in the historic community of Masulih, located in the…
Abstract
This article illustrates the significance of pathways in cultural landscapes. It does so via an in-depth analysis at the paths in the historic community of Masulih, located in the Iranian province of Gilān. The town of Masulih, including its surrounding landscape, has an inter-connected systems of pathways that serve to tie the area together as coherent whole, making it an excellent site to explore the significance of path systems. On a functional level the neighbourhoods and homes, bazaar, teahouses, mosques, and Imāmzādih, in addition to the grazing lands and paths connect shrines outside the community. However, the paths of Masulih are significant beyond their mere utilitarian function as travel routes. This paper finds that various attributes of the paths are interrelated: the relation of path to topography; the cyclical and seasonal usage of paths; the path's function as connector of the bazaar and tea houses where individuals meet and socialize; paths serve as an stage during the lunar rituals that allows for further socializing; lands near and far are connected by the network of paths. Finally, this paper documents the dynamic connections between paths, landscape, built environment, and individuals in Masulih.
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David Castillo-Merino, Josep Garcia-Blandon and Gonzalo Rodríguez-Pérez
This paper aims to examine the effects of the 2014 European regulatory reform on auditors’ activity, the audit outcome and the audit market, with a focus on the Spanish market.
Abstract
Purpose
This paper aims to examine the effects of the 2014 European regulatory reform on auditors’ activity, the audit outcome and the audit market, with a focus on the Spanish market.
Design/methodology/approach
The research is based on in-depth, semistructured interviews with partners of the main audit firms operating in the Spanish market. This qualitative approach provides a precise identification of the cause-effect relationships of the new measures introduced by the European audit regulation.
Findings
The findings indicate that, based on auditors’ opinions, the costs of the main regulatory changes outweigh the benefits. The European Union (EU) Audit Regulation imposes more demanding provisions, such as an extended auditor’s report, mandatory audit firm rotation, more banned nonaudit services and stricter quality controls, resulting in substantial side effects on audit activity and the audit market. This could undermine the objective of enhancing the quality of audit services.
Originality/value
To the best of the authors’ knowledge, this is the first study to analyze the effect of the 2014 EU regulatory reform on audit activity, audit market and audit outcome based on auditors’ perceptions. The findings may be of interest to academics, professionals and regulators alike, as they offer valuable insights for assessing the effectiveness of the new audit provisions. Additionally, the qualitative methodology used facilitates a causal analysis of the key elements introduced by the regulations, potentially paving the way for future research avenues.
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