Search results

The effects of anisotropy and radiation cannot be considered negligible while investigating the stability of the fluid in convection. Hence, the purpose of this paper is to analyze how these effects could affect the system while considering a couple-stress dielectric fluid. Therefore, the study establishes the effect of thermal radiation in a couple-stress dielectric fluid with an anisotropic porous medium using Goody's approach (Goody, 1956).

To analyze the effect of radiation on the onset of convection, the Milne–Eddington approximation is employed to convert radiative heat flux to thermal heat flux. The equations are further developed to approximate for transparent and opaque medium. Stability of the quiescent state within the framework of linear theory is performed. The principle of exchange of stabilities is shown to be valid by means of single-term Galerkin method. Large values of conduction–radiation and absorptivity parameters are avoided as fluid is considered as liquid rather than gas.

The radiative heat transfer effect on a couple-stress dielectric fluid saturated anisotropic porous medium is examined in terms of Milne–Eddington approximation. The effect of couple-stress, dielectric, anisotropy and radiation parameters are analyzed graphically for both transparent and opaque medium. It is observed that the conduction–radiation parameter stabilizes the system; in addition, the critical Darcy–Rayleigh number also shows a stabilizing effect in the absence of couple-stress, dielectric and anisotropy parameters, for both transparent and opaque medium. Furthermore, the absorptivity parameter stabilizes the system in the transparent medium, whereas it exhibits a dual effect in the case of an opaque medium. It was also found that an increase in thermal and mechanical anisotropy parameters shows an increase in the cell size, whereas the increase in Darcy–Roberts number and conduction–radiation parameter decreases the cell size. The validity of principle of exchange of stability is performed and concluded that marginal stability is the preferred mode than oscillatory.

The effects of anisotropy and radiation on Rayleigh–Bénard convection by considering a couple-stress dielectric fluid has been analyzed for the first time.

Aircraft manufacturers for a long time have been looking to reduce the weight of on board equipment to enhance performance both from commercial aspect and from military aspect. The existing wired technology, using cables to connect different on board line replaceable unit apart from increasing the weight also increases the complexity related to electromagnetic interference, installation and maintenance. With continuous technology upgradation in the wireless domain, aviation industry is in the process of using wireless technology for intra-aircraft communication. Wireless technology can meet most of the challenges of modern avionics systems and significantly reduce the weight. This paper aims to look at various aspects of implementing a wireless network including issues related to wired network, aircraft channel, interference issues, suitable wireless protocols for aircraft applications and security aspects.

The paper has relied on literature study on wireless avionics intra-communications (WAIC) and the research work carried out in specific areas related to channel inside an aircraft, interference issues of wireless systems with onboard and external systems operating in the same band and security issues related to wireless network and security requirements of implementing an avionics wireless network (AWN). To identify suitable wireless protocol for AWN literature review and simulation to compare different protocols was carried out.

A single wireless protocol may not be suitable for all aircraft systems, and therefore, there may be a requirement to use multiple technologies. Mutual interference is not expected between WAIC systems with on board and external systems operating in the same band. The channel inside an aircraft is expected to be Rician (LOS) or Rayleigh (NLOS). However, additional measurements may have to be undertaken to have a generalized channel model. Security aspects in an AWN are critical and needs to be analyzed in detail prior to any wireless deployment.

Implementation of wireless technology can pave the way for usage of wireless technology for future generation avionics. With International Telecommunication Union allotting dedicated band for WAIC operations, considerable amount of research has been initiated in this field. It is believed that in the coming 2-3 years, the designers will be ready to replace the existing data wires with wireless transceivers. With radio technical commission for aeronautics and EURACAE involved in development of minimum operations performance standards for WAIC systems use of wireless for intra communication is bound to happen. Therefore, it is necessary to look at different issues for integrating wireless in the avionics domain.

The existing studies have been carried out in individual domains of using wireless in avionics. Separate studies and research work has been carried out for identifying wireless protocols, aircraft channel models, interference issues and security aspects. The paper has attempted to look at all these aspects together including certification.

This case highlights repositioning strategies that change a product’s position in the minds of the consumer in response to changes in market conditions. These changes should be balanced with a certain amount of brand authenticity and continuity. Brand identity is the vision, core values and key beliefs of the brand. There are four main branding strategies as follows: house of brands, endorsed brands, sub-brands and branded house. These options can be placed in a continuum and the position on the branding relationship spectrum reflects the degree to which brands are separated in strategy execution and in the customer’s minds.

This case is based on secondary data, mainly from interviews of industry leaders in business journals, newspapers, research articles and industry reports, including from international organizations.

The case examines the frequent revisions in branding strategies by India’s second largest group of hotels – Indian Hotels Company Limited. Repositioning involves changing the market’s perceptions of an offering to compete more effectively in its target segments. However, a certain amount of continuity is also essential to the brand’s development over time. The case helps students to view the brand from two angles as follows: the angle of brand identity and the disruptive angle of new developments. They will examine the rationale for the frequent repositioning strategies using the brand relationship spectrum and whether these will affect the brand identity of the iconic brand Taj.

This case has been effectively used with MBA Marketing students in Product and Brand Management and Services Marketing classes to demonstrate how companies use repositioning strategies as a considered response to the market conditions. As competitive conditions and consumers evolve, changes in branding strategy will be necessitated. The students are expected to have basic knowledge of brand architecture and brand strategies. The case can be used to illustrate the brand relationship spectrum and the differences among branding strategies in brand architecture.

Teaching notes are available for educators only. Please contact your library to gain login details or email support@emeraldinsight.com to request teaching notes.

The purpose of this paper is to re-conceptualise the hot debrief process after cardiac arrest as a collaborative and distributed process across the multi-disciplinary team. There are multiple benefits to hot debriefs but there are also barriers to its implementation. Facilitating the hot debrief discussion usually falls within the remit of the physician; however, the American Heart Association suggests “a facilitator, typically a health-care professional, leads a discussion focused on identifying ways to improve performance”. Empowering nurses through a distributed leadership approach supports the wider health-care team involvement and facilitation of the hot debrief process, while reducing the cognitive burden of the lead physician.

A mixed-method approach was taken to evaluate the experiences of staff in the Emergency Department (ED) to identify their experiences of hot debrief after cardiac arrest. There had been some staff dissatisfaction with the process with reports of negative experiences of unresolved issues after cardiac arrest. An audit identified zero hot debriefs occurring in 2019. A quality Improvement project (Model for Healthcare Improvement) used four plan do study act cycles from March 2020 to September 2021, using two questionnaires and semi-structured interviews to engage the team in the design and implementation of a hot debrief tool, using a distributed leadership approach.

The first survey (n = 78) provided a consensus to develop a hot debrief in the ED (84% in the ED; 85% in intensive care unit (ICU); and 92% from Acute Medicine). Three months after implementation of the hot debrief tool, 5 out of 12 cardiac arrests had a hot debrief, an increase of 42% in hot debriefs from a baseline of 0%. The hot debrief started to become embedded in the ED; however, six months on, there were still inconsistencies with implementation and barriers remained. Findings from the second survey (n = 58) suggest that doctors may not be convinced of the benefits of the hot debrief process, particularly its benefits to improve team performance and nurses appear more invested in hot debriefs when compared to doctors.

There are existing hot debrief tools; for example, STOP 5 and Take STOCK; however, creating a specific tool with QI methods, tailored to the specific ED context, is likely to produce higher levels of multi-disciplinary team engagement and result in distributed roles and responsibilities. Change is accepted when people are involved in the decisions that affect them and when they have the opportunity to influence that change. This approach is more likely to be achieved through distributed leadership rather than from more traditional top-down hierarchical leadership approaches.

To the best of the authors’ knowledge, this study is the first of its kind to integrate Royal College Quality Improvement requirements with a collaborative and distributed medical leadership approach, to steer a change project in the implementation of a hot debrief in the ED. EDs need to create a continuous quality improvement culture to support this integration of leadership and QI methods combined, to drive and sustain successful change in distributed leadership to support the implementation of clinical protocols across the multi-disciplinary team in the ED.

To study the degradation behaviour of borosilicate glass, which is suitable for hermetic sealing with Molybdenum and Kovar (Fe/Co/Ni) alloys, as a function of concentration and temperature in both acidic and alkaline media for long durations, up to 160 h.

The degradation (weight loss in mg/cm² of the glass sample) was determined by immersing the glass sample in HCl and NaOH solutions at different temperatures for different periods extending up to 300 h. The damage to the glass surface was seen under an optical microscope and the chemical species on the corroded surface were identified by electron spectroscopy for chemical analysis.

The borosilicate glass, having the nominal composition 0.70 SiO₂, 0.039 Na₂O, 0.028 K₂O, 0.21 B₂O₃, 0.01 Al₂O₃ was synthesized by melt and quench techniques. Degradation (corrosion) behaviour of this glass was investigated by immersing glass samples in 5 and 10 per cent HCl and 5 per cent NaOH solutions at different temperatures up to 90°C, for different periods and measuring dissolution rate (weight loss in mg/cm² of the sample). Dissolution rates were found to be 5.47 mg/cm² and 46.77 mg/cm² in 5 per cent NaOH at 60 and 90°C, respectively, whereas they were comparatively low (2.59 and 5.80 mg/cm² at 60 and 90°C, respectively, in 5 per cent HCl medium) after 160 h of total immersion period. The plot of dissolution rates against the temperatures showed the nonlinear behaviour at higher temperatures, probably due to the change in mechanism of corrosion. XPS studies exhibited the chemical species on the corroded surfaces. The optical microscopy of the corroded surface revealed that the corrosion mechanisms were different in acid and alkali media.

The degradation behaviour of borosilicate glass having a specific composition has been investigated as a function of concentration and temperature in both acid and alkaline media. The mixed alkali effect on the degradation behaviour may be studied by varying relative amount of Na₂O and K₂O in the glass composition.

The glass composition under the present study has been used for fabrication of matched type glass‐to‐metal (GM) seals with kovar alloy. In this respect the present study is significant in deciding the environmental conditions for its use.

The degradation behaviour of borosilicate glass having alkali and alkaline earth metal oxides has been investigated as a function of concentration and temperature in both acid and alkali media. The findings in this paper have the potential implications in deciding the environmental conditions for use of GM seals fabricated using this glass.

Our knowledge of why organizations continue to use open source software (OSS) infrastructure technologies is relatively limited, and existing models appear inadequate to explain this continuance phenomenon given that they are set at the individual level and also do not take into account the unique characteristics of OSS. The paper aims to discuss these issues.

Using an institutional perspective, this paper posits that coercive (business value of IT) and normative (open source ideology (IDEO)) factors may be credited with sustaining the continued use of OSS technologies. The study argues that organizations that subscribe to IDEO are more likely to continue using OSS technologies. Survey data are collected from organizations that have implemented an OSS infrastructure technology and a moderated multiple regression analysis is performed to test the proposed hypotheses.

In addition to the business value provided by OSS technologies, adherence to IDEO also impacts decisions to continue using those technologies. The results suggest that once an OSS is implemented in an organization, IDEO can enhance organizations’ intentions to continue using such technologies, directly, as well as indirectly, by amplifying the impact of the perceived business value of the technology.

Much of extant literature on continued use focuses on end-user technologies. This paper is one of the first to focus on infrastructure technologies and examine organizations’ intentions to continue using those technologies by developing a parsimonious theory-driven model for examining organizations’ continued use intentions toward infrastructure IT. Additionally, much of open source research to date has been inwardly focused, and this paper is one of few empirical studies to focus on the demand or consumption side of OSS technologies.

Achieving financial well-being is essential for individuals, families and countries as it leads to life satisfaction and happiness. This study synthesizes and identifies financial well-being’s key areas and dimensions using a blended systematic literature review and bibliometric analysis approach.

The authors systematically study a sample of 467 articles from the Scopus database to identify the research trend regarding financial well-being during the last 25 years (1997–2021). Various graphs and networks are presented to understand the publication trends, influential papers, conceptual and intellectual structures and research collaboration status.

Four clusters in the field of financial well-being were found: conceptualization and antecedents of financial well-being, financial well-being of young adults, the relationship between financial literacy and financial well-being and consequences of financial well-being. Further, emerging themes in financial well-being were identified with a content analysis of the papers published during the last five years.

This study will help financial planners, regulatory bodies and academic researchers in getting a better understanding of financial well-being and in identifying potential areas for future research.

Prior to this study, no such comprehensive bibliometric analysis on financial well-being has been carried out to the best of the authors' knowledge. This gap motivated the authors to combine quantitative and qualitative methods to review the published research and do a content analysis, to identify prominent authors and publications.

Food supply chain transparency and traceability is very important to address the issue regarding quality and safety. In traditional tracing system, with increasing the complexity of supply chain making product recalls difficult to manage and putting human lives at risk. To eliminate such types of risks, blockchain technology gives more efficient and reliable system for food tracing. Recently, there is an exponential rise in adoption of blockchain technology and most disparate IOT (Internet of things) devices in agriculture and food supply chain. It is an evolving technology that comforts the food supply chains by providing transparent data records and manage the food movement in the chain using distributed (P2P) network. That is more secured and there's no need for third party verifications. Our focus in this research will be on the Indian wheat supply chain and issues related to food losses caused by a lack of transparency and traceability. In order to improve the transparency of the wheat supply chain, we created an end-to-end smart wheat supply chain solution that combines blockchain technology, NFC tags, IoTs, and smart contracts. The solution is supported by entity relationship diagrams, information and money flow sequence diagrams, and a blockchain network diagram. We also used a security algorithm and the “NFC-Tag writer by NXP” program to validate and assess our system. This work could serve as a springboard for more in-depth research in this area. Depending on the existing situation in the industry, this research can also advise corporate procedures to deploy blockchain-based applications in the supply chain and logistics industry.

The purpose of this paper is to develop easily reconstitutable nutrient dense mixes using natural food ingredients for enteral feeding, in developing countries. Three mixes were prepared using various combinations of malted wheat, sorghum, finger millet, pearl millet, green gram, linseed and sesame seeds and/or whey proteins and analyzed for nutrient composition and selected quality parameters. It was found that when reconstituted as tube feeds they compared well with the guidelines given by the American Gastroenterological Association. The mixes were not analyzed for all the nutrients and not tested on patients. Opines that they would provide nutritional support at relatively lower cost compared with commercial formulations for varied clinical conditions. Simple indigenous technologies using natural ingredients were employed for formulating the mixes. These mixes would be beneficial for enteral feeding in developing countries in lieu of commercial formulations, which tend to be expensive.