External Pressure Research Articles

Sustainable internal communication and digital trends amidst an energy crisis: can a middle ground be found in South Africa?

PurposeThis study aims to explore the impact of current trends like the development of digital communication channels and a greater focus on sustainability, together with external pressures such as a growing electricity crisis on how internal communication is practiced, by using South African internal communication as context.Design/methodology/approachTwo rounds of qualitative semi-structured interviews were conducted with senior internal communication practitioners and consultants to provide a robust view of the research problem.FindingsIt was found that external pressures and trends were viewed as more important than incorporating the broader definition of sustainability into the practice of internal communication. It became clear that internal communication must negotiate seemingly opposing demands like moving to digital communication, while facing electricity shortages and balancing economic pressures with stakeholder inclusion in messages. The findings suggest that internal communication cement organisational survival but should embody the environmental and social elements of sustainability.Originality/valueThe study contributes new insights to the importance of internal communication during crisis times, like the energy crisis in this study. Internal communication should embody the wider sustainability discussion during periods when challenging external forces are at work.

One faith for different realities: accounting and management practices of Benedictine monasteries

Purpose This paper aims to explore how the accounting and management practices of monastic institutions were shaped by their surrounding social, political, geographical and economic environments, as well as religious ideologies, during critical historical periods. Design/methodology/approach By applying institutional theory and the comparative international accounting history perspective, this study conducts a comparative analysis of archival records from two monasteries, examining how their accounting and managerial practices were influenced by differing institutional logics. The research relies on systematic archival data collection, complemented by secondary sources, to analyze how religious beliefs shaped the accounting and management practices of these institutions and the degree of convergence between the two. Findings This study found that both monasteries adapted their accounting and management practices to their external environments. San Placido demonstrated resilience amidst disruptions such as wars and earthquakes, while Silos showed financial sophistication through diverse income streams. The resilience of these institutions was driven by their ability to align internal operations with external political, economic and social factors. This adaptability, coupled with strategic management, enhanced their capacity to maintain financial stability, illustrating the direct link between external changes, organizational resilience and improved financial health. Research limitations/implications This study highlights the historical interplay between religious principles and accounting management practices in Benedictine monasteries by comparing two monasteries. It reveals how external environments shape internal operations, showcasing the resilience and adaptability of these institutions in maintaining financial sustainability through the alignment of external pressures with internal resilience mechanisms, which in turn bolster their financial health. Originality/value This research contributes valuable insights to historical managerial and accounting literature, shedding light on the financial resilience and strategies used by Benedictine monasteries. It underscores the enduring respectful legacy of their accounting practices and the unique interplay between spiritual devotion and organizational structure within these institutions.

External green pressure, dynamic capability, and green innovation: The regulating effect of executive environmental attention

Aiming to investigate the mediating effect of green dynamic capability on external green pressure and green innovation, as well as the moderating effect of executive environmental attention on external green pressure and green dynamic capability, this study preferred a theory model with five hypotheses. A valid sample of 357 interviewees was investigated to test the proposed hypotheses, and structural equation modeling was utilized. In addition, external green pressures mostly have a significant impact on green innovation, the green dynamic capability as a mediator. Also, executive environmental attention moderates the relationship between external green pressure and green dynamic capabilities. The results offer unique contributions to the literature and some suggestions for practicing in manufacturing enterprises.

Energy Citizenship: Revealing the Intrinsic Motivational Factors Suggested by Self-Determination Theory

This study investigated the motivational factors driving energy citizenship through the lens of self-determination theory. Utilizing data from a survey of 749 respondents, we examined the role of intrinsic and extrinsic motivations in predicting energy citizenship. Our findings reveal that intrinsic motivations, such as personal responsibility for climate change, community involvement, and the desire to reduce one’s carbon footprint, significantly predict engagement in energy citizenship. Conversely, extrinsic motivations, including financial incentives and external pressures, were not significant predictors. The study underscores the importance of intrinsic motivations in fostering sustained pro-environmental behaviours, particularly as the complexity of these behaviours increases. These insights suggest that policymakers should focus on enhancing intrinsic motivations through education, community engagement, and autonomy-supportive initiatives to promote active participation in sustainable energy practices.

Differential diagnosis of gastric submucosal masses and external pressure lesions

Differential diagnosis of gastric submucosal masses and external pressure lesions

Experimental and Analytical Study on the External Water Pressure of a Composite Lining Considering the Waterproofing and Drainage System

Experimental and Analytical Study on the External Water Pressure of a Composite Lining Considering the Waterproofing and Drainage System

Hierarchical structure Fe@CNFs@Co/C elastic aerogels with intelligent electromagnetic wave absorption

AbstractDeveloping intelligent electromagnetic wave (EMW) absorption materials with real‐time response‐ability is of great significance in complex application environments. Herein, highly compressible Fe@CNFs@Co/C elastic aerogels were assembled through the electrospinning method, achieving EMW absorption through pressure changes. By varying the pressure, the effective absorption bandwidth (EAB) of Fe@CNFs@Co/C elastic aerogels shows continuous changes from low frequency to high frequency. The EAB of Fe@CNFs@Co/C elastic aerogels is 14.4 GHz (3.36–17.76 GHz), which covers 90% of the range of S/C/X/Ku bands. The theoretical simulation indicates that the external pressure prompts a reduction in the spacing between the fiber layers in the aerogels and facilitates the formation of a 3D conductive network with enhanced attenuation ability of EMW. The uniform distribution of metal particles and appropriate layer spacing can effectively optimize the impedance matching to achieve the best EMW absorption performance. This work state clearly that the hierarchically assembled elastic aerogels composed of metal–organic frameworks (MOFs) derivatives and carbon fibers are ideal dynamic EMW absorption materials for intelligent EMW response.image

External abdominal pressure radiography versus survey radiography for the diagnosis of hiatal hernia in brachycephalic dogs

Hiatal hernia (HH) is a common disorder in brachycephalic dogs with upper airway obstruction. The breathing effort results in an exaggerated transdiaphragmatic pressure gradient during inspiration that can displace the gastroesophageal junction causing gastroesophageal reflux. The diagnosis is challenging because the HH usually occurs intermittently and is often missed on survey radiography. In this retrospective study, the application of external abdominal pressure to mimic the transdiaphragmatic pressure gradient during radiographic screening for HH was evaluated in 146 dogs. Hiatal hernia was diagnosed with external abdominal pressure radiographs in 6.8% (10/146 dogs), whereas it was diagnosed via survey radiography in only 2% (3 dogs). In conclusion, the radiographic diagnosis of HH in brachycephalic dogs can be improved by performing external abdominal pressure radiographs.

Analysis of the effect of permeant solutes on the hydraulic resistance of the plasma membrane in cells of Chara corallina.

In the cells of Chara corallina, permeant monohydric alcohols including methanol, ethanol and 1-propanol increased the hydraulic resistance of the membrane (Lpm-1). We found that the relative value of the hydraulic resistance (rLpm-1) was linearly dependent on the concentration (Cs) of the alcohol. The relationship is expressed in the equation: rLpm-1 = ρmCs + 1, where ρm is the hydraulic resistance modifier coefficient of the membrane. Ye et al. (2004) showed that membrane-permeant glycol ethers also increased Lp-1. We used their data to estimate Lpm-1 and rLpm-1. The values of rLpm-1 fit the above relation we found for alcohols. When we plotted the ρm values of all the permeant alcohols and glycol ethers against their molecular weights (MW), we obtained a linear curve with a slope of 0.014M-1/MW and with a correlation coefficient of 0.99. We analyzed the influence of the permeant solutes on the relative hydraulic resistance of the membrane (rLpm-1) as a function of the external (π0) and internal (πi) osmotic pressures. The analysis showed that the hydraulic resistance modifier coefficients (ρm) were linearly related to the MW of the permeant solutes with a slope of 0.012M-1/MW and with a correlation coefficient of 0.84. The linear relationship between the effects of permeating solutes on the hydraulic resistance modifier coefficient (ρm) and the MW can be explained in terms of the effect of the effective osmotic pressure on the hydraulic conductivity of water channels. The result of the analysis suggests that the osmotic pressure and not the size of the permeant solute as proposed by (Ye et al., J Exp Bot 55:449-461, 2004) is the decisive factor in a solute's influence on hydraulic conductivity. Thus, characean water channels (aquaporins) respond to permeant solutes with essentially the same mechanism as to impermeant solutes.

Influence of Organizational Market Culture on Change Management in Kenyan Social Enterprises

Firms ought to continuously adapt and modify their operations to fit the changing circumstances in the fiercely competitive and dynamic business environment. This suggests that businesses must incur substantial costs to carry out a variety of changes that will enable them to operate in the changing environment. Adjustments play an important part in defining firm competitiveness in the modern economic environment; however, many firms struggle to properly manage innovations, ensure long-term development, and motivate employees to accept change. This study explored the influence of organizational market culture on change management in social enterprises in Kenya. The study employed the Competing Values Culture theory to assess the company's culture. Using a descriptive design, the study targeted all 129 employees of Kidogo Early Years Company Limited, from top management to departmental level. Data collection involved questionnaire surveys for primary data. Analysis of quantitative data was by Statistical Package for Social Sciences version 29. The regression analysis findings revealed that organizational market culture (β = 0.310, p = 0.012) had significant positive influence on change management. The study concludes that organizations that are goal-oriented and market-driven are more adaptable to external pressures and are better positioned to manage change effectively. In view of the findings, the study recommends that for organizations with a market culture, it is crucial to embed a results-oriented approach that aligns change management with organizational goals and objectives. Practices such as setting clear performance targets, encouraging a competitive spirit, and focusing on market-driven strategies should be incorporated into daily operations. Keywords: Organizational Market Culture, Change Management, Social Enterprises, Organizational Culture Influence, Kenya

Leakage control mechanisms and strategies for hydraulically driven controllable rod seals

Abstract The primary function of rod seals in hydraulic systems is to prevent the leakage of the hydraulic medium, which would otherwise result in environmental pollution and the loss of energy. However, the leakage control performance of conventional rod seals is limited by the level of product design. As a result, the performance of these seals will gradually degrade during the service process. Furthermore, it is not possible to adaptively adjust the performance of these seals in response to changes in operating conditions. Hydraulically controllable rod seals (HCRS) can be driven hydraulically to adjust the internal stress distribution of the seal to regulate the sealing performance. This may be an effective solution, although the leakage control mechanism and strategy remain unclear. This paper employs a thermoelastohydrodynamic mixed lubrication model to comparatively analyse the behaviours and performances of the HCRS with or without a cavity structure. The leakage control mechanism of the HCRS is revealed, namely that it is achieved by increasing the interface contact pressure and reducing the fluid film thickness through external pressurization. Furthermore, the functional relationship between the sealing performance and the regulating variables under different operating conditions is obtained through multivariate regression analysis, thereby forming the quantitative leakage control strategy of the HCRS.

Flexibility, Dispersion Property, and Giant Sunlight Absorption of Monolayer MX2 (M = Zr, Hf; X = S, Se) and Related Janus MXY (M = Zr, Hf; X = S, Y = Se)

IVB–VIA transition metal dichalcogenides (TMDs) MX2 (M = Zr, Hf; X = S, Se) and related Janus MXY (M = Zr, Hf; X = S, Y = Se) have garnered significant attention due to their unique optoelectronic properties. To further explore their potential in flexible photonics, their mechanical, band dispersion, and optical dielectric properties using orbital hybrid theory are investigated. The results reveal that the out‐of‐plane linear compression resistance of these materials is considerably lower than their in‐plane resistance, primarily because van der Waals interactions are much weaker compared to ionic bond interactions. This characteristic makes them less susceptible to external pressure and torsional forces, positioning them as promising candidates for flexible optoelectronic devices. Furthermore, the presence of multiple energy bands at the same momentum state suggests a tendency toward metal–insulator transitions. Notably, the materials exhibit a high photon flux, indicating robust photoelectric conversion capabilities, making them suitable for applications in photoelectric transducers. This study not only deepens the understanding of the optoelectronic and mechanical properties of IVB–VIA TMD materials, but also offers theoretical guidance for the development and application of flexible optoelectronic devices based on IVB‐VIA TMDs and related Janus materials.

A new semi-analytical approach for nonlinear dynamic responses of functionally graded porous graphene platelet-reinforced circular plates and spherical shells

This paper presents the semi-analytical approach for nonlinear dynamic responses of porous graphene platelet-reinforced circular plates (CiPs) and spherical shells (SpSs) resting on the Pasternak foundation in thermal environment. The graphene platelets (GPLs) are distributed in the functionally graded (FG) distribution patterns and uniform distribution pattern through the CiP and SpS thickness direction. The governing equations of the GPL-reinforced structures subjected to time-dependent external pressure respected to the harmonic and linear functions of time are established based on the geometrically nonlinear higher-order shear deformation theory. A simple and effective semi-analytical solution for the considered problem is established using the Euler-Lagrange equations, and the damping viscosity of the foundation can be counted using the Rayleigh dispassion function. The Runge-Kutta method is employed to determine the dynamic responses of the GPL-reinforced structures, while the fundamental frequencies of free and linear vibration, and frequency-amplitude curves are obtained in explicit form. The numerical results obtained reveal that the GPL and porous distributions, geometrical and material properties can significantly affect the frequency-amplitude curves, and dynamic responses of harmonically loaded and linearly loaded structures, specially, the dynamic buckling phenomenon is clearly observable with the SpSs but not with the CiPs.

Processing Solid Hydrogels into Hollow Structures by Infrared Laser Light for Highly-Efficient Drug Loading and Controlled Release.

Hollow hydrogels, characterized by their three-dimensional networks akin to biological tissues, are extensively utilized in artificial blood vessels, drug delivery, and nerve conduits due to their superior biocompatibility and fluid-transportation capacity. Nonetheless, the fabrication of hollow hydrogels presents significant challenges, including intricate steps, costly equipment, and structural instability. Consequently, refining the preparation techniques for hollow hydrogels remains paramount to surmounting the limitations of conventional methods. This research introduces an innovative approach that markedly diverges from traditional techniques, offering notable convenience and efficiency in the creation of hollow hydrogel structures. The central novelty of this method lies in employing laser light to induce an in situ photothermal effect, leading to the formation of hollow configurations. This laser-driven transformation of solid hydrogels into hollow structures addresses numerous shortcomings associated with traditional methods. For instance, conventional chemical approaches often necessitate several days to yield hollow hydrogels, and the resultant structures tend to be fragile and susceptible to damage under external pressure. In contrast, the laser-assisted technique facilitates the formation of hollow structures within 240 s, significantly outpacing traditional methods. To achieve controlled drug release, silk fibroin was integrated into the wall of the hollow hydrogels, enabling modulation of wall permeability and directing the drug release process.

Assessing the health of wetland using the PSR approach with reference to the Renuka Ramsar Site, India.

Wetlands are important ecosystems, and few of them, owing to unique characteristics, have been designated the status of Ramsar sites under the convention of wetlands. Despite the status, few of these wetlands are under threat owing to their social importance. Renuka wetland is one such important Ramsar site in India, which is culturally an embodiment of the Goddess Renuka ji. An international fair is held every year at the lake which attracts thousands of pilgrims and tourists. This event is one of the major contributors to anthropogenic risk; other pressures are siltation, pollution, land use activities, and invasive species. Under such a scenario, it becomes important to assess the health of wetlands to take timely decisions about their management. This study evaluates the health of Renuka wetland, using the Pressure State and Response (PSR) model. Relevant data related to the wetland and its catchment from a wide spectrum of sources, namely, field, laboratory, and remote sensing were combined to assess the health of the wetland. Ten indicators were identified, and Analytic Hierarchy Process (AHP) was used to assign weights to the indicators. The wetland health index of Renuka wetland is 0.35, indicating that the lake is in poor condition exhibiting degraded functioning, high external pressure, low vigor, poor resilience, and stability. The study also revealed that the water quality deteriorates post-fair. Thus, the wetland needs attention in terms of management so that the health of the lake improves and is sustained in the future. The study contributes to Sustainable Development Goal 6.6 which focuses on protecting and restoring water-related ecosystems and aims at healthier ecosystems.

Intangible cultural heritage versus tourism: residents’ reactions to temporal overtourism during the Day of the Dead in Mixquic, Mexico

ABSTRACT Globalisation opens small communities and their traditions to temporal overtourism, causing adaptations in the local dynamics. This study investigates responses to overtourism during the Day of the Dead in Mixquic, a semi-rural community located in Mexico City. Employing rapid ethnography, semi-structured interviews, participant observation, and content analysis of social media, it delves into local perceptions and actions regarding temporary overtourism dynamics in a global patrimonialisation context. Results reveal a complex interplay between traditional practices, community resilience, and tourist dynamics. Despite challenges, residents show a positive attitude towards tourists, often incorporating them into ancient traditions while preserving cultural authenticity. Notably, symbolic representations of tradition persist amidst external pressures, showcasing the resilience of community identity. The study underscores the importance of embracing community-centric approaches – observing and considering the community – and innovative tourism strategies to mitigate negative impacts for a better preservation of cultural heritage. By prioritising resident values and needs, tourism can lead to practices that are beneficial to both communities and visitors. Furthermore, the research highlights the importance of observing and listening to local communities.

Blast wave ingress into a room through an opening – Review of past research and US DoD UFC 3-340-02

Blast wave ingress into a room through a facade opening results in complex pressure-time loadings on interior surfaces due to shock diffraction and interior reflections. The U.S. DoD UFC 3-340-02 Structures to Resist the Effects of Accidental Explosions includes a method to predict internal loading for such cases. Parameters such as the opening size, room dimensions and the external pressure wave characteristics influence the interior loading. Recent work suggests that the UFC methodology might overpredict the interior loading by some 600%. Such conservatism can result in over-engineered or prohibitively expensive protective solutions. In this paper we critically review the methodology of the UFC, that of Kaplan’s preceding work (on which the UFC relies), and the experimental data that informed both these works. Through a series of 45 case-studies we compare the UFC and Kaplan’s predictions with those of a computational fluid dynamics (CFD) model. The UFC consistently overpredicts the CFD area-averaged peak pressure of the back wall by up to 290% and the side-wall by up to 425%. Similarly, the UFC overpredicted the CFD side wall positive phase impulse by up to 565%. By contrast, the UFC predicted back wall positive phase impulse was similar to the CFD results. As our CFD results for side and back walls are area averaged, and not solely for the wall centre-point, as in other recent work, our paper gives support for the use of CFD prediction over the UFC for cost-effective design of structures to resist blast ingress.

A qualitative exploratory study into medical, nursing and allied health professional experiences of elective withdrawal of non-invasive ventilation in a motor neurone disease cohort.

With absence of a cure, the mainstay of management for patients with motor neurone disease (MND) is holistic supportive care and symptom control. Non-invasive ventilation (NIV) can provide relief from distressing dyspnoea which often accompanies progressive respiratory muscle weakness. Some patients using NIV will become dependent on it, with a small proportion of these patients going on to request withdrawal. Despite being legal in the UK, elective withdrawal of NIV can be emotionally and ethically challenging for the staff involved. To guide the process of symptom-controlled withdrawal, in 2015 the Association for Palliative Medicine (APM) released clinical guidance. The aim of this study is to explore the experiences of the multi-disciplinary team (MDT) involved in elective withdrawal of NIV in an MND cohort following the publication of this guidance. A qualitative, semi-structured interview study of eight NHS qualified staff members (three Doctors, four Nurses, one Allied Health Professional). Clinicians were asked questions relating to their experiences of the withdrawals. After full transcription, data was analysed thematically. Four main themes were identified, offering insight into how the withdrawals affected staff's well-being and summarised via an 'enablers and barriers' model. The setting was important, as was the depth and longevity of the clinician's investment in the patient. Positive influences on staff's well-being arose from the sense of fulfilling the patient's wishes, good teamwork, presence of an experienced clinician and awareness of the APM (2015) Guidance. Conversely, barriers to well-being were expressed through the unpredictability of each scenario, moral and ethical uncertainties, external pressures on time, mismatched expectations, poor communication and the emotional intensity of the act. Elective withdrawal is highly emotive, simultaneously positively and negatively influencing staff well-being. By addressing the potential mitigating factors, the overall impact on staff's mental health and well-being maybe improved and thus, subsequently, patient care.

Novel Bio-inspired Design for the Carcass Layer of Flexible Risers with Increased Strength Under External Pressure

Novel Bio-inspired Design for the Carcass Layer of Flexible Risers with Increased Strength Under External Pressure

CYBERSECURITY RISK MITIGATION IN INDUSTRIAL CONTROL SYSTEMS ANALYZING PHYSICAL HYBRID AND VIRTUAL TEST BED APPLICATIONS

Industrial Control Systems (ICS) play a vital role in industries such as oil, utilities, and manufacturing, forming the backbone of critical infrastructure. With the increasing integration of network capabilities in ICS, their exposure to cyber-attacks has grown significantly. However, due to the sensitivity of these systems, access to detailed technical information is limited, making cybersecurity research challenging. To address this, researchers have employed various physical, hybrid, and virtual testbeds to simulate and analyze cyber threats. This systematic review, conducted following PRISMA guidelines, aims to evaluate the effectiveness of these testbeds in mitigating cybersecurity risks in ICS, particularly within the context of a clean water supply system. The findings reveal that physical testbeds offer a comprehensive understanding of the behavior and dynamics of ICS components, such as sensors and actuators, under real-world conditions affected by external factors like pressure, temperature, and mechanical wear. However, physical testbeds' high cost and complexity limit their widespread use. While more cost-effective, hybrid testbeds fail to capture crucial physical dynamics, which may lead to incomplete assessments of cybersecurity vulnerabilities. Virtual testbeds provide the most affordable option, offering scalability and ease of implementation. However, they deliver a limited view of ICS operations that can impair the development of accurate detection and prevention mechanisms. The results underscore the trade-offs associated with each testbed type, suggesting that an integrated approach, blending physical and virtual elements, may offer the most effective framework for cybersecurity research in ICS while balancing cost and realism.