Search results

This paper seeks to evaluate the influence of tellurium content on the machinability of the microalloyed pearlitic steel (DIN 38MnS6). Two grades of steels were used, one with high (27 times greater) tellurium content and one with a low tellurium content. Machinability of the steel was determined by the number of holes drilled by the tool before undergoing severe deformation. The drilling test matrix was prepared using a fractional factorial design with five input variables studied at two levels (25‐1). Other variables investigated include cutting speed (45 and 60 m/min), feed rate (0.15 and 0.25 mm/rev), geometry of the twist drills and use of minimum quantity lubrication (MQL) at the flow rates of 30 and 100 ml/h. Statistical analysis of the results revealed that composition of the work material was most influential on tool performance. Addition of tellurium to the steel significantly improved machinability, increasing the number of drilled holes by over 100 per cent. The MQL flow rate was the least influential as increase in the flow from 30 to 100 ml/h reduced drill life only by about 9 per cent.

The drilling tests were carried out in the vertical position, up‐down, without pre‐holes (full drilling). Cutting speeds of 45 and 60 m/min and feed rates of 0.15 and 0.25 mm/rev were employed. Drills with two sharpening types were tested. Cutting fluid used was vegetable based and applied using the MQL technique at flow rates of 30 and 100 ml/h. The rejection criterion adopted was severe deformation of the drills and the number of machined holes was used to measure the machinability of the material.

Of all the variables investigated in this study, the least influential on drill performance is the MQL flow rate. Increase in the flow rate from 30 to 100 ml/h reduced drill performance by 9 per cent, contrary to expectation. This is a result of the cooling‐lubricant action balance promoted by the cutting fluid applied in low quantities (MQL). The most influential variable on drill performance is addition of Te to the work material which gave over twofold (103 per cent) improvement in drill performance at the cutting conditions investigated. The Te particles act at the chip‐tool interface, reducing the work necessary to shear the material during chip formation. Increase in both the cutting speed and the feed rate both lowered drill performance during machining due to associated increase in cutting temperature which tended to accelerate thermally related wear mechanisms.

This work was conducted to evaluate the machinability of a novel alloyed steel employed in the automobile industry. Drilling was considered as most automobile components especially the engine block is designed with many holes which require drilling process.

The purpose of this paper was to identify examples of management lore currently in the organizational sciences.

The authors deliberated and developed a series of examples of management lore in the organizational sciences and surveyed management practitioners concerning their beliefs in the lore hypothesized.

Pervasive beliefs that conflict with academic research exist in management practices. Although many of these ideas are commonly accepted as immutable facts, they may be based upon faulty logic, insufficient understanding of academic research, anecdotal evidence and an overdependence upon common sense. Buckley and Eder (1988) called these as examples of management lore. In this conceptual paper, we identify and discuss 12 examples of management lore that persist in day-to-day management practices. Topics we explore include personality, emotional intelligence, teams, compensation, goals, performance, work ethic, creativity and organizational citizenship behaviors.

A number of areas in which academic research gainsays what we believe to be an immutable fact.

From the agency theory’s point of view, this paper aims to analyze corporate governance mechanisms about the characteristics of the companies quoted in the segments Bovespa Mais and Bovespa Mais 2 and their influence on the creation of value in preparation for the opening of the initial public offering (IPO).

A quantitative approach was adopted to achieve the proposed objective using the panel data with fixed effects and secondary data collected on the Comissão de Valores Mobiliários website, using statistical software Stata® 13.0 for statistical tests. The population comprises non-financial companies belonging to the Bovespa Mais and Bovespa Mais Level 2 groups, as the survey sample took into account the period of adhesion of the companies, totaled in 15 companies, which cover the period from 2008 to 2019. The selected variables correspond to the ownership structure’s characteristics, then the board’s composition and the fiscal council as the body responsible for supervising the administrators’ acts.

The main results indicate that the number of independent members on the board of directors and the supervisory board’s participation positively influence market performance. However, it also reveals that the concentration of ownership brings fundraising for other companies’ acquisitions, risk reduction concerning information asymmetry between investing powers.

The main results indicate that the number of independent members on the board of directors and the supervisory board’s participation positively influence market performance. Despite this, it also reveals that the concentration of ownership brings fundraising for other companies’ acquisitions, risk reduction concerning information asymmetry between investing powers.

This paper advances a comparative institutional perspective to explain capital market choice by firms making an IPO in a foreign market. This paper finds that internal governance characteristics (founder-chief executive officer, executive incentives and board independence) and external network characteristics (prestigious underwriters, degree of venture capitalist syndication and board interlocks) are significant predictors of foreign capital market choice by foreign IPO firms.

While product market choices have been central to strategy formulation for firms in the past, financial markets’ integration makes capital markets an equally crucial strategic decision. This paper advances a comparative institutional perspective to explain capital market choice by firms making an IPO in a foreign market.

This situation generates value to shareholders and is perceived by the market and, ultimately, generates a direct relationship with the market performance of companies. While product market choices have been central to strategy formulation for firms in the past, financial markets’ integration makes capital markets an equally major strategic decision.

The purpose of this paper is to explore opportunities and barriers to using lean construction to address issues related to the value, quality and scalability of affordable housing production in Latin America.

This paper presents a case study of a housing developer in Ecuador that used lean construction in the design and construction stages of an affordable housing project. The study describes how the developer addressed operational challenges derived from implementing a customization strategy and analyzes qualitative and quantitative data to assess the outcomes of lean initiatives.

The developer reduced cost and delivery time without sacrificing consumer choice. However, the economic and policy conditions worked against the benefits of lean construction, demonstrating the importance of the regulatory context in facilitating or inhibiting lean initiatives and construction innovation.

This paper focuses on conventional means for new housing construction. Self-help and upgrading are not covered.

The operational challenges described in this study, as well as the innovative ways to deal with them, are beneficial for practitioners seeking to improve the quality and efficiency of affordable housing construction.

This paper advances knowledge about how to increase value and quality delivery in the built environment which may benefit low-income families.

This study bridges construction innovation and housing policy, discussing the potential of lean construction within the policy and regulatory environment in which affordable housing takes place.

Purpose: The primary purpose is to discuss the productivity and digitalisation interaction at the theoretical level, analyse the productivity and digitalisation differences between the European Union (EU)-14 and EU-13 countries, and evaluate the digitalisation impact on the manufacturing sector labour productivity of the EU countries.

Need for study: The average added value created per capita in new EU countries (EU-13) is one-third lower than in old EU countries (EU-14). To increase productivity, manufacturing companies must adapt to modern trends and take advantage of industrial digitisation opportunities. Digitisation can improve production efficiency, reduce costs, and improve product quality, allowing continuous monitoring and analysis of production data, enabling informed decisions and faster problem-solving.

Methodology: Analysis of scientific literature, comparing viewpoints, insights, and conclusions. The empirical study includes calculating rates of change of indicators, differences between EU-14 and EU-13, and structural analysis. The impact of digitisation on the productivity of EU countries is studied by creating a correlation matrix and using regression analysis: ordinary least square models.

Findings: EU-13 countries are behind EU-14 in labour productivity and manufacturing digitalisation. Digitalisation positively impacts productivity per employee. A faster increase in digitisation, industrial robot use, and e-commerce sales could significantly increase productivity in EU-13, reducing productivity differences between countries.

Practical implications: This study highlights the need for policy promoting digitisation innovation, particularly in EU-13 countries, to be implemented by both national and EU-based economic development and regional and cohesion institutions.

Despite recognition of the centrality of emotions in entrepreneurship, little attention has been given to role of emotions in the development of entrepreneurial identity or enactment of entrepreneurial role. The contribution of the chapter is in the development of a dynamic model of the process leading to identification or dis-identification as an entrepreneur. In this chapter, we develop a dynamic model of the process leading to identification or dis-identification as an entrepreneur. We theorize that the driver behind an individual’s decision to become an entrepreneur, and their significant emotional experiences in the entrepreneurial role, influence the likelihood of following an identification or dis-identification cycle. Specifically, our framework proposes that positive emotions strengthen approach motivation and identification with the role, while negative ones foster avoidance motivation and dis-identification. We argue that contextual embeddedness can prompt transition between these two cycles. Our theorization provides new insights into methods of analyzing the role of emotions in the entrepreneurial process, more specifically in the process of entrepreneurial identity crafting. These insights also can be translated into studying the crafting of any professional identity.

Drawing from research on art integration, we discuss why visual arts and social studies can be powerful partners in promoting critical thinking skills. Because this is an increasingly visual society, visual literacy is becoming progressively more important. Through the visual arts, students have the opportunity to analyze and evaluate information, which are critical academic and citizenship skills. The integration of these two content areas and skills facilitates effective use of the limited time teachers have with students. In order to demonstrate the integration of art and social studies, we provide a lesson plan on Western Expansion.

This chapter describes why safe spaces are needed in education settings for full inclusion of gendered identities as they intersect with categories such as race/ethnicity, class, sexual orientation, and ability. This discussion briefly addresses varying and intersecting levels and domains of privilege or marginalization such as identity, inter-/intraaction, organization, society, and knowledge, and how safe spaces in education can support learning as it is entwined with gender, gendered biases, and power dynamics and structures.

This study aims to develop a risk prioritization process using failure mode and effect analysis (FMEA) in association with composition of probabilistic preferences (CPP) and weighting the risk analysis criteria. It seeks to develop decision-making considering the fast response necessary to achieve project objectives in complex scenarios, such as the pandemic of COrona VIrus Disease 19 (COVID-19).

After identifying the risks, the prioritization process was applied to a project in the oil and gas area, in which a focus group assessed these risks. This evaluation took place employing traditional FMEA, FMEA with CPP by axes considering four points of view and FMEA with CPP by weighted sum with the use of a multicriteria method to weight the criteria. These approaches were compared to understand their differences and benefits, with a flow chart being developed, consolidating the procedure.

The methodologies that showed the greatest benefits were FMEA with CPP by axes PO (progressive-optimistic) and by weighted sum. Essentially, this was mainly related to the interrelationship between risks and to the importance of prioritization.

This procedure can consider company's views on what is critical and the interrelationship between risks. It provides a clear segmentation of what should and should not be prioritized. It was also developed in a practical case, showing a possible alternative to support fast responses in decision-making.