Search results

The purpose of this paper is to report the first of four planned fire experiments on the 9.1 × 6.1 m steel composite floor assembly as part of the two-story steel framed building constructed at the National Fire Research Laboratory.

The fire experiment was aimed to quantify the fire resistance and behavior of full-scale steel–concrete composite floor systems commonly built in the USA. The test floor assembly, designed and constructed for the 2-h fire resistance rating, was tested to failure under a natural gas fueled compartment fire and simultaneously applied mechanical loads.

Although the protected steel beams and girders achieved matching or superior performance compared to the prescribed limits of temperatures and displacements used in standard fire testing, the composite slab developed a central breach approximately at a half of the specified rating period. A minimum area of the shrinkage reinforcement (60 mm²/m) currently permitted in the US construction practice may be insufficient to maintain structural integrity of a full-scale composite floor system under the 2-h standard fire exposure.

This work was the first-of-kind fire experiment conducted in the USA to study the full system-level structural performance of a composite floor system subjected to compartment fire using natural gas as fuel to mimic a standard fire environment.

To facilitate innovative software development, more and more software development teams (SDTs) turn to agile methods. Such agile methods develop both extensive and efficient software responses to a client’s requirement change. However, the antecedents of successful agile software development are poorly understood. The authors goal is to propose a model of how power asymmetry and paradoxical leadership interact and affect agility in SDTs, which in turn affect their capacity to innovate. By leveraging insights from research on individuals’ cognition, the authors argue that developers with relatively higher power evaluate their contributions to their teams more ambivalently, which increases their delay or postponement of their contributions to their teams’ tasks. As a result, power asymmetry is negatively related to software teams’ response extensiveness and efficiency. Second, and drawing on leadership studies on behavioral complexity, the authors consider the moderating role of paradoxical leadership that a team receives as an important moderating factor to this effect. The authors argue that, when team leaders exhibit paradoxical leadership behaviors, high-power individuals’ ambivalence is less likely to emerge; hence, transforming power asymmetry to an asset for the enhancement of agility in the SDT.

The purpose of this paper is to investigate the effect of TiO₂ nanoparticle content on the corrosion behavior of Ni‐Cr/TiO₂ nanocomposite coatings applied by pulse‐reverse electroplating.

Ni‐Cr/TiO₂ nanocomposite coatings with various contents of TiO₂ nanoparticles were electrodeposited by pulse‐reverse method from a bath containing TiO₂ nanoparticles to be codeposited and citric acid as the complexing agent. The surface morphology and the composition of coatings were studied by scanning electron microscopy (SEM) equipped by energy dispersive X‐ray system (EDS). The corrosion performance of coatings in the 0.5 M NaCl as a corrosive solution was investigated by potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) methods.

It was found that the surface of Ni‐Cr/TiO₂ nanocomposite coatings showed a finer structure that was more uniform and compact in appearance than was that of Ni‐Cr coatings. The incorporation of TiO₂ nanoparticles in the alloy coating matrix improved the corrosion performance of the coatings and the higher content of nanoparticles gave better corrosion resistance.

Applying the Ni‐Cr coatings by the pulse‐reverse plating method eliminated cracks that were a problem in the Ni‐Cr alloy coating structure. Furthermore, the corrosion resistance was improved by the addition of TiO₂ nanoparticles to the alloy matrix. This paper reports the optimum plating conditions that gave the better corrosion performance.

The purpose of this paper is to study the electrochemical, mechanical and thermal characteristics of polyester – epoxy coating systems using electrochemical impedance spectroscopy (EIS), pull-off test and differential scanning calorimetry (DSC). These are very important properties to evaluate the performance of a coating system. Proper measurement and analysis techniques are needed for a proper evaluation of these properties to ensure the coating performance.

Different ratios of polyester and epoxy resins have been blended to formulate good anticorrosive, mechanically strong and thermally stable binder coating system. EIS, pull-off test and DSC were used to evaluate these properties.

The sample containing 90 wt.% polyester exhibited the best corrosion resistance from the beginning until the end of exposure time. The value of corrosion resistance (R_c) obtained on the 30th day of exposure was found to be 2.89 × 108 ohm cm⁻². The glass transition temperature (T_g) was found to be increasing with the incorporation of epoxy to the binder system. The result from pull-off test showed the best adhesion with the sample containing 90 wt.% polyester which also has the lowest T_g promoted better adhesion properties.

The curing time must be reduced for practical applications.

Hybrid coatings systems have been formulated. This paper discusses on the highest coating resistance obtained polymer-substrate mechanical properties and thermal characteristic of the polyester/epoxy binder resin using DSC.

Software process tailoring (SPT) plays a critical role in contemporary software development. Because SPT determines how a software project proceeds, its effectiveness should be investigated. Specifically, SPT is a collaborative yet highly conflictual process, and the existing literature has paid little or no attention to how team members coordinate and to how power distance (PD) influences coordination under this conflictual situation for the purpose of fostering SPT effectiveness.

A propositional research method is utilized by reviewing the extant literature regarding SPT, team coordination and PD. Accordingly, several propositions are developed to theorize the contributive and moderating effects of team coordinative capabilities and PD on SPT effectiveness.

This study advances the understanding of the underlying mechanisms of the four distinct coordination capabilities in performing SPT, which will help software firms comprehend the moderating effects of PD on the relationships among coordinative capabilities and SPT effectiveness.

This study extends coordination theory and reveals four coordination capabilities that nurture SPT effectiveness. Moreover, this study demonstrates how power plays a role in the coordination of a team through the collaborative yet divergent SPT decision process to yield an integrative tailoring solution. In particular, we take a fresh viewpoint of PD considering the member-member relationship in exploring its moderating effects in the SPT context.

The study intends to determine the environment, social and governance (ESG)'s impact on the firm's value. In addition, how ownership concentration (OC) and transparency and disclosures (TD) influence the impact of firm's ESG on its valuation (firm value).

The relevant panel data with a sample of 78 Indian firms for five years (2016–2020) are gathered. Both linear and nonlinear connections of firm's ESG with its value are tested. In addition, TD and two components of OC (stakes of promoters and institutional investors) are empirically tested as moderators on the connectivity of the firm's ESG with its value.

The linear association of firm's ESG with its value is found insignificant. ESG is found to have a positive and nonlinear (U-shaped) impact on the value of the firms. TD does not moderate the connectivity of firm's ESG with its valuation (firm value). The higher stakes of promoters positively affect the association of firm's ESG with the valuation. However, the high stakes of institutional investors retard the ESG's influence on the firm value.

The study is on Indian firms for five years. A sample of more than one nation and a longer duration (10 years) could have helped better determine the associations among the variables. In turn, these limitations can be the present study's future scope. In addition, the authors find a lack of standardisation of the ESG scales, which is a problem in measuring it. Using standardisation scales of ESG for the analysis can also be future scope on the topic.

The investors would be wary of the level of ESG to influence the firms' value positively. Managers also need to be careful to have sincere efforts for ESG to reap its rich dividends. Policymakers may take cognisance that despite having board seats (in a few cases), institutional investors negatively (instead of positively as expected) influences the ESG's association with the firm's value. They may bring some guidelines or legislative changes to fix responsibility on the part of the institutional investors.

No study reports the linear and nonlinear association of ESG on the firm's value to observe clearer connectivity between the two. Similarly, no study is observed to have promoters and institutional investors as moderators on the association of firm's ESG with the valuation (firm value). Hence, the present study considerably augments the extant literature on the topic and its contribution.

The purpose of this paper is to identify the issues and challenges in humanitarian logistics and to develop a framework for effectively managing the humanitarian logistics in disaster relief supply chain operations in India.

This paper presents a framework to manage humanitarian logistics effectively in disaster management through qualitative analysis. First, the author examines the challenges facing the humanitarian logistics and supply chain through the reviews of the literature on various disasters. Then, the author presented a framework based on the best practices and initiatives taken worldwide in the preparedness and response stage of the humanitarian supply chain to manage and reduce the aftermath of any disaster in context to India.

A framework has been developed to manage humanitarian logistics in the disaster relief operation, which would improve the humanitarian supply chain in India and help to effectively manage natural disasters in the preparedness and response stage at the state and district levels.

The paper mainly emphasises on the preparedness and response stage of disaster supply chain management in Indian context.

None of the disaster incidents can be stopped from taking place, but the impact can be minimised by proper preparedness and effective response during the operations of humanitarian logistics. With this hope, the framework has been developed, which if implemented would help to plan and manage any disaster incident in an effective manner, which ultimately would save millions of lives and cost in terms of infrastructure, property, assets etc.

As natural disaster incidents are occurring frequently in Indian states, there is an urgent need for a framework to manage the logistics operations effectively and efficiently during any disaster relief operations. Limited literature is found on developing and presenting a framework focusing on the preparedness and response phase of disaster supply chain management in context to India. Hence, this paper is believed to be the first to fulfil this gap with main emphasis on the preparedness and response stage of disaster supply chain management in Indian scenario.

This study aims to examine the relationship between corporate governance (CG) voluntary disclosure (VD) and firm valuation (FV). Moreover, the study also investigates whether VD mediates the impact of CG on FV or not.

The study is based on a panel data set of top 100 listed firms on Bombay Stock Exchange (BSE) over the period of 2014–2018 and develops CG index and VD index (VDI) in order to capture both the constructs respectively. The author adopts suitable panel data model to examine the relationship between CG, VD and FV as well as indirect impact of CG on FV through mediation of VD. Further, the author uses instrumental variables regression model for robustness check.

The author's findings reveal significant positive impact of CG on FV. Likewise, VD also exhibits significant positive impact on FV. Notably, the interaction of CG and VD complements each other in making positive contribution towards FV. In addition, the author observes that VD partially mediates the impact of CG on FV. Specifically, the outcome suggests that CG apart from having direct impact on FV also influences the same through the mediation of VD. Moreover, as the direction of indirect impact coincide with direct impact, such indirect impact has complementary relationship with the direct impact, implying that when CG makes direct contribution towards improving FV, CG's contribution toward FV through mediation of VD also increases.

To the best of the author's knowledge, this is the first endeavor in the extant literature that examines the interaction performance impact of CG and VD. Further, the author also provides primary evidence on the mediating impact of VD in the relationship between CG and FV.

Software process tailoring (SPT) is a knowledge- and learning-intensive activity in which a software project team customizes its software development processes to accommodate project particularities. Because SPT critically influences how a project is conducted, SPT performance should be investigated, but the extant literature lacks investigations into how team knowledge mechanisms and team environments contribute to SPT performance. To fill this gap, this study looks into a team's absorptive capacity (AC) and combines a transactive memory system (TMS) and team climate inventory (TCI) to develop a theoretical research model to facilitate the understanding of SPT performance.

This paper is a conceptual study that uses the propositional methodology with a focused review of existing literature pertaining to SPT, AC, TMS and TCI to develop a theoretical model to foster SPT performance. Because this study is conceptually established, further empirical research and studies are also suggested.

The proposed model provides guidance for firms conducting SPT. It also contributes to future research aiming to empirically understand the mechanisms behind the identified team-based knowledge and environmental enablers in the dynamic team learning process that lead to superior SPT performance.

The proposed model provides a fresh look at the dynamic capabilities theory in SPT and innovatively identifies a team's dynamic learning process to show how a team can conduct effective SPT through AC and facilitated by TMS. Environmental climates characterized by vision, participative safety, task orientation and support for innovation act as positive moderators in promoting the team dynamic learning process.