Jacques Masounave, Youssef A. Youssef, Yves Beauchamp and Marc Thomas
Investigates the effects of the most influential cutting parameters (cutting speed, feed rate, depth of cut, tool nose radius, tool length and work piece length) on surface…
Abstract
Investigates the effects of the most influential cutting parameters (cutting speed, feed rate, depth of cut, tool nose radius, tool length and work piece length) on surface roughness quality and on the formation of built‐up edge in a lathe dry turning process of mild carbon steel samples. A full factorial design (384 experiments), taking into account the three‐level interactions between the independent variables has been conducted. The results show that the following three‐level interactions: feed rate × cutting speed × depth of cut, feed rate × cutting speed × tool nose radius and tool nose radius × depth of cut × tool length have significant effects on surface roughness in this type of machining operation. Shows that the analysis of main effects alone and even two‐level interactions could lead to a false interpretation of the results. The analysis of variance revealed that the best surface roughness is achieved with a low feed rate, a large tool nose radius and a high cutting speed. The results also show that the depth of cut has no significant effect on surface roughness when operating at cutting speeds higher than 160m/min. Furthermore, it is shown that built‐up edge formation deteriorates surface roughness when machining mild carbon steel at specific feed rate, tool nose radius and cutting speed levels. Proposes a new model for evaluating the limiting cutting speed to avoid the built‐up edge formation. Finally, shows through experimentation that an increase in depth of cut would lead to improved surface roughness when tool vibration is increased.
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Fatma A. Mohamed, A.A. Mousa, R. Farouk, Y.A. Youssef, Y.A. Youssef and Y.A. Youssef
This paper aims to synthesise, characterise and find out the properties of a model dye for convenient union dyeing of wool, polyester and wool/polyester blend fabric compared with…
Abstract
This paper aims to synthesise, characterise and find out the properties of a model dye for convenient union dyeing of wool, polyester and wool/polyester blend fabric compared with C.I. Disperse Yellow 23. The reactive disperse dye was prepared containing sulphatoethylsulphone (SES) as a reactive group. The dye was synthesised by diazotization and coupling reaction. Firstly, we synthesized azo dye intermediate I using 1-aminobenzene-4-sulphatoethylsulphone diazotized and then coupled it with aniline. The synthesized azo dye intermediate I was diazotized and coupled with phenol to give dye 2. Different factors affecting the dyeability and fastness properties of SES dye 2 were thoroughly investigated on wool, polyester and wool/polyester blend fabrics in comparison with C.I. Disperse Yellow 23 dye 1. Maximum exhaustion and total fixation yield using sulphatoethylsulphone (SES) dye 2 were achieved on wool fabric at neutral pH 7. The dye showed high dyeing performance due to its nonionic reactive VS derivative. The dyeing results indicate high quality dyeing properties
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Yeri Tordecilla Avila, Jana Schmutzler, Patricia Beatriz Marquez Rodriguez and Eduardo Gómez Araujo
This paper aims to evaluate whether entrepreneurs with an innovative product/service are more likely to formally register their businesses. Understanding the decision of business…
Abstract
Purpose
This paper aims to evaluate whether entrepreneurs with an innovative product/service are more likely to formally register their businesses. Understanding the decision of business registration as a rational choice of the entrepreneurs, where she weighs the costs versus the benefits of such formalization, the study expands the literature on informal entrepreneurship by looking at the benefit-side rather than the typically evaluated cost-side of an individual cost-benefit evaluation.
Design/methodology/approach
The authors relied on the Global Entrepreneurship Monitor (GEM) adult population survey to evaluate the hypothesis. Specifically, the authors used the GEM data of 2016 for Colombia, covering 2,069 observations (a representative sample at the country level), evaluating the relationship between innovativeness and business registration for the early stage of the entrepreneurial process. Given the nature of our dependent variable, the authors estimated a logistic regression model.
Findings
Different from what the authors hypothesized, they did not find empirical evidence for a positive correlation between an innovative product or service and business registration. Instead, businesses that compete with many others offering the same product/service have a higher tendency to register at the Chamber of Commerce. Contrarily of what might be suspected, opportunity-based entrepreneurship – as opposed to necessity-based – is not a relevant variable when formalizing a business, providing evidence for our hypothesis that necessity-based entrepreneurship cannot be equalized with informal entrepreneurship. Additionally, the authors show that an entrepreneur with higher socioeconomic status is more likely to register his company.
Research limitations/implications
The results provide first exploratory evidence that the benefit evaluation may play a role in formalizing a start-up, thus calling for future research that not only tackles the influence of registration costs and administrative burden but rather looks at the outcome of a cost-benefit analysis. The data imply several limitations which future research should address: variables measuring the innovativeness of the product/service are rather coarse measures and need to be expanded and detailed in future research. Additionally, the authors acknowledge that a relatively high number of missing values may generate a selection bias in our population sample. Finally, because of situating the research in a developing country, the research results may lack generalizability. Therefore, researchers are encouraged to test the proposed propositions further.
Practical implications
In a country like Colombia with very high levels of informality, it is necessary that the government fully understands the role of innovation in the formalization process of start-ups. The results indicate that a differentiation of support mechanisms to increase the formalization of businesses according to the different stages of their development may be necessary and that aside from costs, benefits of formalization play a role. A higher level of formality is not only related to economic growth but also much better protection of workers, therefore going beyond the reduction of registration costs and the implied administrative burden should be an additional public policy target for decreasing informality. Finally, the correlation of socioeconomic stratum with the decision to register hints at a varying evaluation of formalization, a point that merits attention by government and academia.
Originality/value
The study shifts the focus from the evaluation of solely costs for business registering as a barrier to start-up formalization to the cost-benefit analysis. The authors propose – and show – that such an evaluation is not generalizable for all kinds of business. Specifically, the authors show that a start-up is more likely to register when it competes with a large number of competitors than when it competes with a smaller number of others offering the same. At the same time, the authors also show that the stage at which the start-up company is at influences the decision to formalize.
Propósito
Este trabajo tiene como objetivo evaluar si los empresarios con un producto/servicio innovador son más propensos a registrar formalmente sus negocios, entendiendo la decisión de registrar el negocio como una elección racional, en la que el emprendedor sopesa los costos frente a los beneficios de dicha formalización. Este estudio amplía la literatura sobre el emprendimiento informal al plantear un análisis enfocado en los beneficios de una formalización del negocio.
Diseño/metodología/enfoque
Se utiliza la encuesta Global Entrepreneurship Monitor (GEM) Adult Population Survey para evaluar nuestras hipótesis. Específicamente, utilizamos los datos del GEM de 2016 para Colombia, cubriendo 2.069 observaciones (una muestra representativa a nivel de país), evaluando la relación entre una oferta innovadora y el registro de negocios para la etapa temprana del proceso emprendedor. Dada la naturaleza de nuestra variable dependiente, estimamos un modelo de regresión logística.
Conclusiones
Contrario a la hipótesis propuesta, no encontramos una correlación estadísticamente significativa positiva entre un producto o servicio innovador y el registro de empresas. En su lugar, las empresas que compiten con muchas otras empresas que ofrecen el mismo producto/servicio tienen una mayor tendencia a registrarse en la Cámara de Comercio. Asimismo, el emprendimiento basado en la oportunidad -en contraposición al basado en la necesidad- no es una variable relevante a la hora de formalizar un negocio, hallazgo en congruencia con a nuestra hipótesis de que el emprendimiento basado en la necesidad no puede equipararse al emprendimiento informal. Además, mostramos que un emprendedor con un estatus socioeconómico más alto tiene una mayor probabilidad de registrar su empresa.
Limitaciones/implicaciones de la investigación
Los resultados obtenidos proporcionan la primera evidencia exploratoria de que la evaluación de los beneficios puede desempeñar un rol en la formalización de una empresa de nueva creación, por lo que se requiere mayor investigación que no sólo aborde la influencia de los costos de registro y administrativos asociados, sino que examine el resultado de un análisis costo-beneficio. Los datos utilizados tienen varias limitaciones que una investigación posterior debería abordar: las variables que miden el carácter innovador del producto/servicio son medidas muy básicas y deben ampliarse y detallarse en futuros estudios. Además, el número relativamente alto de valores perdidos puede generar un sesgo de selección en nuestra muestra empleada. Por último, al situar nuestra investigación en el contexto de un país de desarrollo, los resultados pueden ser poco generalizables. Por lo tanto, futuras investigaciones deberían abordar en detalle los hallazgos presentados.
Implicaciones prácticas y sociales
En un país como Colombia, con niveles muy altos de informalidad, es necesario que el gobierno comprenda plenamente el papel de la innovación en el proceso de formalización de las empresas emergentes. Nuestros resultados indican que una diferenciación de los mecanismos de apoyo para aumentar la formalización de las empresas según las diferentes etapas de su desarrollo puede ser necesario. A su vez, además de los costos, los beneficios de la formalización juegan un papel importante. Un mayor nivel de formalidad no sólo está relacionado con el crecimiento económico sino también con una mejor protección de los trabajadores, por lo que ir más allá de la reducción de los costos de registro y de la carga administrativa implícita debería ser un objetivo adicional de política pública para disminuir la informalidad. Por último, la correlación del estrato socioeconómico con la decisión de registrarse sugiere que la evaluación de formalizarse varía dependiendo del estatus socioeconómico, un punto que merece la atención del gobierno y la academia.
Originalidad/valor
Nuestro estudio desplaza la atención exclusiva en los costos de registro de una empresa, y sus barreras asociadas, hacia el análisis costo-beneficio como parte de la evaluación y decisión de formalización de las nuevas empresas. Proponemos ‐y demostramos‐ que dicha evaluación no es generalizable para todo tipo de empresas. En concreto, demostramos que es más probable que una empresa emergente se registre cuando compite con un gran número de competidores que cuando compite con un número menor de otras que ofrecen lo mismo. A su vez, también mostramos que la etapa de desarrollo en la cual se encuentra la empresa emergente influye en la decisión de formalizarse.
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Denise Helena França Marques, Nicia Raies Moreira de Souza and Shahamak Rezaei
In 2019, Brazil had approximately 53.4 million entrepreneurs, of which 60.2% were start-ups. The contingent of nascent entrepreneurs was 11.1 million people and in just one year…
Abstract
In 2019, Brazil had approximately 53.4 million entrepreneurs, of which 60.2% were start-ups. The contingent of nascent entrepreneurs was 11.1 million people and in just one year it grew 390%, a fact that can be explained, on the one hand, by the beginning of the economic recovery of the country which, although timid, began arousing with the gross domestic product closing the year 2019 with growth of 1.1%, and on the other hand, by the slow cooling of the national unemployment rate that reached 11.0% in the last quarter of 2019 (IBGE, 2019). Women have been occupying an important space in the country's entrepreneurial activities, with an initial specific rate of entrepreneurship (total early-stage entrepreneurial activity (TEA)) of 23.1%, similar to that of men, and established specific rates of entrepreneurship (total establishing entrepreneurial activity (TEE)) of 13.9% (GEM, 2019). Despite the enthusiasm brought by the numbers, it is necessary to pay attention to what are the entrepreneurial activities performed by these women, since in a country like Brazil, transformations brought by innovative thoughts, technological development, and expansion of education are not privileges of the entire population. Besides the differences between genders, even among women, the impact of changes in society occurs in different ways, and the “pure” concept of entrepreneurship, associated with innovation and the creation of new products and services, is valid for only a portion of them, leaving to others the broader concept related to creativity, risk, use of available resources, and economic sustainability in a context where individual characteristics and unfavorable structural conditions are intertwined (Haas, 2013). In this sense, the objective of this work is to present the national reality of female entrepreneurship, contributing with the understanding of who are the Brazilian women entrepreneurs that correspond to these “pure” and broad concepts and, therefore, shed light on new studies and research that can contribute with more accurate diagnoses about these women.
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H.Z. Shams, Y.A. Youssef, F.A. Mohamed, M.M. El‐Zawahry, M.H. Helal and E.A. El‐Kharadly
The purpose of this paper is to evaluate the efficiency of modifying reactive azo dyes using pyrazolo[1,2‐a]pyrazole fused systems as the chromophoric moiety which could satisfy…
Abstract
Purpose
The purpose of this paper is to evaluate the efficiency of modifying reactive azo dyes using pyrazolo[1,2‐a]pyrazole fused systems as the chromophoric moiety which could satisfy many and varied criteria drawn from economic, synthetic, physicochemical and fastness properties.
Design/methodology/approach
Six novel heterocyclic disazo reactive dyes were prepared, containing monofunctional sulphatoethylsulphone (SES) and hetero‐bifunctional monochlorotriazine (MCT)/SES reactive groups. Dyes intermediates based on 4‐arylazo‐1,5‐dioxopyrazolo[1,2‐a]pyrazole chromophoric moieties are initially synthesised and coupled with two different diazonium salts having the aforementioned reactive groups, thus yielding the new target reactive dyes. The synthesised dyes are applied to cotton, wool and silk fabrics under the typical exhaust dyeing conditions and their dyeing properties were investigated.
Findings
The results assessed for dyeing indicate high‐quality dyeing properties. However, the heterobifunctional MCT/SES dyes showed higher exhaustion and fixation values, colour yields and fastness properties than those of the monofunctional SES dyes.
Research limitations/implications
The method developed provided a simple and practical procedure for producing fused pyrazolo[1,2‐a]pyrazole disazo chromophoric systems that afford valuable reactive dyes. In addition, the dyes intermediates based on 4‐arylazo‐1,5‐dioxopyrazolo[1,2‐a]pyrazole as well as their disazo counterparts could be applied as acid dyes to wool and silk.
Originality/value
The method for producing novel disazo reactive dyes could find numerous applications for affording a variety of reactive dyes with different binding linkages and structural reactivity. These could be valuable as reactive dyes with different colour shades.
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Fatma Mohamed and Y.A. Youssef
The purpose of this paper is to synthesise, characterise and find out properties of some new bifunctional reactive azo dyes using pyrazolo[1,2‐a]pyrazole 3‐carboxylic acid fused…
Abstract
Purpose
The purpose of this paper is to synthesise, characterise and find out properties of some new bifunctional reactive azo dyes using pyrazolo[1,2‐a]pyrazole 3‐carboxylic acid fused systems as the chromophoric moiety, bearing good colour strength, lightfastness, and other favourable properties.
Design/methodology/approach
The dyes are synthesised by diazotisation, coupling and cyclisation reactions. Firstly, synthesised 4‐arylazo‐1,5‐dioxopyrazolo[1,2‐a]pyrazole 3‐carboxylic acid chromophoric moieties and coupled with diazonium salts having the aforementioned reactive groups, thus yielding the new target reactive. The synthesised dyes were applied to cotton and wool fabrics under the typical exhaust dyeing conditions and their dyeing properties were investigated. The structures of these dyes are characterised and confirmed by melting point, elemental analysis, infrared, ultraviolet‐visible spectroscopy (UV/VIS) and nuclear magnetic resonance (1H‐NMR) data.
Findings
The wavelength of maximum absorptions, molar extinction coefficients are strongly dependent on the electron donating ability of the substituents on the coupling moiety. The absorption bands of these dyes move towards longer wavelength as the polarity of the solvents and electron density of substituents on the coupling moiety increase. The dyes applied on cotton and wool showed higher exhaustion and fixation values, colour yields and fastness properties.
Research limitations/implications
The method developed provided a simple producing fused pyrazolo[1,2‐a]pyrazole disazo chromophoric systems based on 4‐arylazo‐1,5‐dioxopyrazolo[1,2‐a]pyrazole 3‐carboxylic acid as well as reactive dyes applied on wool and cotton dyes.
Originality/value
In this paper, three series of pyrazolo[1,2‐a]pyrazole derivatives dyes are synthesised and characterised. They have not been registered in the literature previously.
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Nowadays, the main challenge in the higher education is the daunting task of transforming universities into digital era institutions. Improving HE students' competence to meet the…
Abstract
Nowadays, the main challenge in the higher education is the daunting task of transforming universities into digital era institutions. Improving HE students' competence to meet the flow of technological innovations through DT has been the focus of many countries. This task has imposed the restraint that HE institutions should implement the most effective strategies of DT. This chapter is focusing on how DT strategies play their role in making the transformation itself become germane and give its fruits. Therefore, this chapter presents the most effective DT strategies that can be implemented by HE institutions in order to prepare their students for the existing professional roles in their societies. A good DT strategy is one that connects the organization's current level of digital maturity with its future ambition. The well-known strategies in the DT field are as follows: the strategy of electronic projects, strategy of smart electronic platforms, integrated training strategy, participatory e-learning strategy, smart learning strategy, pervasive learning strategy, microlearning strategy and e-design thinking strategy, in addition to the strategy in which traditional learning methods are combined with e-learning methods. It is worth noting here that the chapter is not an attempt to favor a strategy over another or compare and contrast them to uncover their differences at any level. On the contrary, the writer will work on displaying how each strategy can be implemented in order to accomplish DT in HE instructional practices. Also, this chapter will show how complementary these strategies can be once they are utilized to reach DT.
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Sami Alanzi, Vanessa Ratten, Clare D'Souza and Marthin Nanere
Culture and economic settings are often perceived as key influential elements in formulating the entrepreneurial ecosystem, either on the organizations level or the entire social…
Abstract
Culture and economic settings are often perceived as key influential elements in formulating the entrepreneurial ecosystem, either on the organizations level or the entire social system. In their different forms, culture and economic conditions have always been critical drivers for innovation and entrepreneurship. Understanding the community's cultural traits and economic status helps entrepreneurs map their entrepreneurial objectives and define enablers and deterrents. This chapter investigated the cultural and economic environment within the Gulf Council Countries (GCC), mapped their Corporate Social Responsibility (CSR) practices and entrepreneurial performance. It was evident that some cultural traits, such as tribalism, could play an adverse role in supporting entrepreneurship. However, the economic system, which mainly relies on oil and gas production, could be the best enabler for entrepreneurship, which has a unique nature in the GCC and receives high government reinforcement through massive capital surpluses generated from the oil revenue. The latest statistics ranking the global entrepreneurship performance indicated that the GCC lay in the middle area among other countries worldwide. Qatar came on the top of the GCC with a global rank of 22, while Saudi Arabia came last, at position 45 globally. The government legislative and economic support for entrepreneurship activities contributes to preparing a proper authoritative climate that promotes entrepreneurship and could be a golden opportunity for entrepreneurs in the GCC.
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N.F. Ali, S. Shakra, Y.A. Youssef and T.S. Aysha
New disazo and polyazo ureido reactive dyes incorporating different reactive systems were synthesized and applied to cotton fabric by the exhaust dyeing method. Different factors…
Abstract
New disazo and polyazo ureido reactive dyes incorporating different reactive systems were synthesized and applied to cotton fabric by the exhaust dyeing method. Different factors affecting the dye ability and fastness properties of such dyes are investigated.
Bis(monochlorotriazine) reactive dyes displayed higher primary exhaustion values compared to those obtained with bis(sulphatoethysulphone) and bis(monochlorotriazine/sulphatoethysulphone) reactive dyes under different neutral exhaustion conditions. The results obtained indicate that the fixation efficiencies of these dyes were higher than those of dyes incorporating the bis(dichlorotriazine) reactive system. The results assessed for alkaline exhaust dyeing indicate that the bis(monochlorotriazine/sulphatoethylsulphone) dye was less sensitive to the variation in fixation temperatures than the other reactive dyes. The fastness properties of the ureido reactive dyes were fair to good.
The improved dyeing performance of such type of ureido reactive dyes should lead to the design of reactive dyes with good application and fastness properties on cotton fabric, and provide practical solutions for low-salt dyeing. The present study of synthesis of disazo and polyazo ureido reactive dyes of high molecular structure, and its application to cotton fabric by the exhaust dyeing method is novel and could be applied in the industry.
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Emmanuel Arthur, George Cudjoe Agbemabiese, George Kofi Amoako and Patrick Amfo Anim
This study aims to explore the role customer satisfaction play in mediating the nexus between commitment, trust, relative dependence and customer loyalty from an emerging market…
Abstract
Purpose
This study aims to explore the role customer satisfaction play in mediating the nexus between commitment, trust, relative dependence and customer loyalty from an emerging market context under a business-to-business (B2B) setting.
Design/methodology/approach
The study was a descriptive survey, and using convenience sampling technique, questionnaires were used to gather data from 356 businesses that were distributors of Guinness Ghana Company Limited. Partial least squares structural equation modeling was used to test the proposed hypotheses for this study, and macro-PROCESS was performed to test the mediating effect of customer satisfaction.
Findings
The findings show that relative dependence had the most considerable significant and positive impact on B2B partners satisfaction, followed by commitment and trust, respectively. A positive and significant relationship was also found between B2B firms’ satisfaction and loyalty. The result also indicates that customer satisfaction mediates the relationship between commitment, trust, relative dependence and B2B loyalty.
Practical implications
Practitioners can manipulate specific relative dependence, commitment and trust features to increase customer satisfaction with their firm’s services, thus ensuring longer-term customer loyalty.
Originality/value
Drawing on the social exchange theory, this study provides a more profound perspective focusing on an emerging market context, by examining from a B2B setting the significance of commitment, trust, relative dependence and B2B partners satisfaction on loyalty.