Search results

1 – 10 of 100
Article
Publication date: 17 September 2024

Wanfeng Zhu, Petia Venkova Sice, Wenchun Zhang, Krystyna Krajewska and Zhangyang Zhao

The purpose of this paper is to bring into the public domain converging ways of thinking about reality and human systems, exploring parallels between the theory of Physical Vacuum…

Abstract

Purpose

The purpose of this paper is to bring into the public domain converging ways of thinking about reality and human systems, exploring parallels between the theory of Physical Vacuum and the concept of Qi in Medical Qigong science.

Design/methodology/approach

The approach adopted in this paper includes: review of the relevant literature; dialogues between the first two authors over an eight-month period; review of the findings and discussion of interpretations by all.

Findings

There is evidence for the existence of an ideal information field. This field is a real space-time torsion structure. Qi is a torsion field. It spreads with superluminal velocity and connects the whole Universe. Any entity is in a constant dynamic connection with everything else in the Universe.

Research limitations/implications

This paper offers limited discussion of the wider area of scientific discoveries.

Social implications

The findings may impact future interdisciplinary research, health/well-being practices and public policy.

Originality/value

There is no known to us publication interpreting the parallels between the theory of the Physical Vacuum and the concept of Qi.

Details

Kybernetes, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 0368-492X

Keywords

Article
Publication date: 16 September 2024

Royal Madan, Pallavi Khobragade and Shubhankar Bhowmick

This study aimed to analyze the free vibration of a radially graded Ni-Al2O3-based functionally graded (FG) disk with uniform thickness.

Abstract

Purpose

This study aimed to analyze the free vibration of a radially graded Ni-Al2O3-based functionally graded (FG) disk with uniform thickness.

Design/methodology/approach

Using the energy method, natural frequencies of rotating and non-rotating disks were determined at the limit elastic angular speed. Material properties were estimated using a modified rule of mixture. Both even and uneven porosity variation effects were considered in the material modeling. Finite element analysis validated the analytical approach.

Findings

The study explored limit angular speeds and natural frequencies across various grading indices, investigating the impact of porosity types and grading indices on these parameters.

Practical implications

Insights from this research are valuable for researchers and design engineers involved in modeling and fabricating porous FG disks, aiding in more effective design and manufacturing processes.

Originality/value

This study contributes to the field by providing a comprehensive analysis of free vibration behavior in radially graded Ni-Al2O3-based FG disks. The incorporation of material modeling considering both even and uneven porosity variation adds originality to the research. Additionally, the validation through finite element analysis enhances the credibility of the findings.

Details

Multidiscipline Modeling in Materials and Structures, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 1573-6105

Keywords

Book part
Publication date: 25 September 2024

Bahrooz Jaafar Jabbar

Since 2010, the eastern Mediterranean has witnessed a transformative narrative with the discovery of natural gas reserves off the coasts of Cyprus and Israel. This pivotal…

Abstract

Since 2010, the eastern Mediterranean has witnessed a transformative narrative with the discovery of natural gas reserves off the coasts of Cyprus and Israel. This pivotal development has drawn attention to the region, where Egypt, Israel, Cyprus, Turkey, and Greece share maritime borders. The emergence of natural gas has reshaped geopolitical dynamics, and Western countries assume to reduce their reliance on Russia for energy supplies. This chapter explores the magnitude of natural gas discoveries and production in Cyprus and Israel, examining the interconnection of their fields and the ambitious endeavor of laying a 1,900-km underwater pipeline to the Greek island of Crete. Additionally, it highlights the pivotal roles played by key regional actors such as Israel, Turkey, and Egypt in shaping security and energy negotiations. However, Turkey has a significant position in the eastern Mediterranean and the Middle East, but tensions have arisen as neighboring countries seek to limit Turkey’s involvement in regional energy discussions, viewing its policies as a potential threat, thereby exacerbating Turkey’s regional interventions, particularly in Cyprus. Each of these countries in the Middle East is struggling to get more of the cake. Above all, Israel has been a gas importer throughout its history and now dreams of becoming a natural gas exporter to Europe.

Details

Deciphering the Eastern Mediterranean's Hydrocarbon Dynamics: Unravelling Regional Shifts
Type: Book
ISBN: 978-1-83608-142-5

Keywords

Open Access
Article
Publication date: 28 June 2024

Ebere Donatus Okonta and Farzad Rahimian

The purpose of this study is to investigate and analyse the potential of existing buildings in the UK to contribute to the net-zero emissions target. Specifically, it aims to…

Abstract

Purpose

The purpose of this study is to investigate and analyse the potential of existing buildings in the UK to contribute to the net-zero emissions target. Specifically, it aims to address the significant emissions from building fabrics which pose a threat to achieving these targets if not properly addressed.

Design/methodology/approach

The study, based on a literature review and ten (10) case studies, explored five investigative approaches for evaluating building fabric: thermal imaging, in situ U-value testing, airtightness testing, energy assessment and condensation risk analysis. Cross-case analysis was used to evaluate both case studies using each approach. These methodologies were pivotal in assessing buildings’ existing condition and energy consumption and contributing to the UK’s net-zero ambitions.

Findings

Findings reveal that incorporating the earlier approaches into the building fabric showed great benefits. Significant temperature regulation issues were identified, energy consumption decreased by 15% after improvements, poor insulation and artistry quality affected the U-values of buildings. Implementing retrofits such as solar panels, air vents, insulation, heat recovery and air-sourced heat pumps significantly improved thermal performance while reducing energy consumption. Pulse technology proved effective in measuring airtightness, even in extremely airtight houses, and high airflow and moisture management were essential in preserving historic building fabric.

Originality/value

The research stresses the need to understand investigative approaches’ strengths, limitations and synergies for cost-effective energy performance strategies. It emphasizes the urgency of eliminating carbon dioxide (CO2) and greenhouse gas emissions to combat global warming and meet the 1.5° C threshold.

Details

Urbanization, Sustainability and Society, vol. 1 no. 1
Type: Research Article
ISSN: 2976-8993

Keywords

Open Access
Article
Publication date: 23 September 2024

Prabhugouda Mallanagouda Patil, Bharath Goudar and Ebrahim Momoniat

Many industries use non-Newtonian ternary hybrid nanofluids (THNF) because of how well they control rheological and heat transport. This being the case, this paper aims to…

Abstract

Purpose

Many industries use non-Newtonian ternary hybrid nanofluids (THNF) because of how well they control rheological and heat transport. This being the case, this paper aims to numerically study the Casson-Williamson THNF flow over a yawed cylinder, considering the effects of several slips and an inclined magnetic field. The THNF comprises Al2O3-TiO2-SiO2 nanoparticles because they improve heat transmission due to large thermal conductivity.

Design/methodology/approach

Applying suitable nonsimilarity variables transforms the coupled highly dimensional nonlinear partial differential equations (PDEs) into a system of nondimensional PDEs. To accomplish the goal of achieving the solution, an implicit finite difference approach is used in conjunction with Quasilinearization. With the assistance of a script written in MATLAB, the numerical results and the graphical representation of those solutions were ascertained.

Findings

As the Casson parameter β increases, there is an improvement in the velocity profiles in both chord and span orientations, while the gradients Re1/2Cf,Re1/2C¯f reduce for the same variations of β. The velocities of Casson THNF are greater than those of Casson-Williamson THNF. Approximately, a 202% and a 32% ascension are remarked in the magnitudes of Re1/2Cf and Re1/2C¯f for Casson-Williamson THNF than the Casson THNF only. When velocity slip attribute S1 jumps to 1 from 0.5, magnitude of both F(ξ,η) and Re1/2Cf fell down and it is reflected to be 396% at ξ=1, Wi=1 and β=1. An augmentation in thermal jump results in advanced fluid temperature and lower Re1/2Nu. In particular, about 159% of down drift is detected when S2 taking 1.

Originality/value

There is no existing research on the effects of Casson-Williamson THNF flow over a yawed cylinder with multiple slips and an angled magnetic field, according to the literature.

Details

International Journal of Numerical Methods for Heat & Fluid Flow, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 0961-5539

Keywords

Article
Publication date: 19 December 2022

Dinçer Aydın and Esma Mıhlayanlar

Many parameters influence the success of sustainable projects (SPs) in the architecture–engineering–construction. One of these important parameters is the project delivery…

Abstract

Purpose

Many parameters influence the success of sustainable projects (SPs) in the architecture–engineering–construction. One of these important parameters is the project delivery attributes (PDA), which are influenced by the project delivery system (PDS) while affecting the selection of it. This study aims to evaluate the significance of PDAs in influencing both the performance and success of SPs in Turkey, where the interest in SPs is high.

Design/methodology/approach

The impact of PDAs was determined by applying the two-round Delphi method with a semistructured interview involving the main stakeholders of a construction project, like owners, designers, contractors and consultants who played active roles in SPs, as well as academics to theoretically evaluate the issue. The significance of PDAs was assessed using the relative importance index, and the results were validated using the interrater agreement analysis.

Findings

The study identified key PDAs impacting SPs as owner character, commitment and motivation; simulation and energy modelling; and timing of stakeholders/early involvement.

Originality/value

The investigation of the significance of the PDAs is a lesser-studied context. Therefore, a research framework that enables an effective set of methods for solving the sectoral problems of PDAs that have impacts on SPs has been proposed. The framework is expected to open new opportunities for the generation and regulation of the PDSs for SPs. The findings will provide valuable insights to project stakeholders, particularly owners, local authorities and policymakers to assess which PDAs have a greater impact on sustainability performance when setting PDSs in SPs in other developing countries.

Details

Journal of Engineering, Design and Technology , vol. 22 no. 5
Type: Research Article
ISSN: 1726-0531

Keywords

Open Access
Article
Publication date: 15 January 2024

Marcello Braglia, Francesco Di Paco, Roberto Gabbrielli and Leonardo Marrazzini

This paper presents a new and well-structured framework that aims to assess the current environmental impact from a Greenhouse Gas (GHG) emissions perspective. This tool includes…

1176

Abstract

Purpose

This paper presents a new and well-structured framework that aims to assess the current environmental impact from a Greenhouse Gas (GHG) emissions perspective. This tool includes a new set of Lean Key Performance Indicators (KPIs), which translates the well-known logic of Overall Equipment Effectiveness in the field of GHG emissions, that can progressively detect industrial losses that cause GHG emissions and support decision-making for implementing improvements.

Design/methodology/approach

The new metrics are presented with reference to two different perspectives: (1) to highlight the deviation of the current value of emissions from the target; (2) to adopt a diagnostic orientation not only to provide an assessment of current performance but also to search for the main causes of inefficiencies and to direct improvement implementations.

Findings

The proposed framework was applied to a major company operating in the plywood production sector. It identified emission-related losses at each stage of the production process, providing an overall performance evaluation of 53.1%. The industrial application shows how the indicators work in practice, and the framework as a whole, to assess GHG emissions related to industrial losses and to proper address improvement actions.

Originality/value

This paper scrutinizes a new set of Lean KPIs to assess the industrial losses causing GHG emissions and identifies some significant drawbacks. Then it proposes a new structure of losses and KPIs that not only quantify efficiency but also allow to identify viable countermeasures.

Details

International Journal of Productivity and Performance Management, vol. 73 no. 11
Type: Research Article
ISSN: 1741-0401

Keywords

Expert briefing
Publication date: 17 September 2024

The talks yielded some progress but fell short of full agreement on the GSI project, a proposed underwater cable that would connect the electricity grids of Cyprus, Greece and…

Book part
Publication date: 25 September 2024

Bahrooz Jaafar Jabbar

The Eastern Mediterranean’s energy reserves have ushered in a new era of economic, military, and political dynamics, both locally and globally. While the trade in natural gas has…

Abstract

The Eastern Mediterranean’s energy reserves have ushered in a new era of economic, military, and political dynamics, both locally and globally. While the trade in natural gas has reshaped the region’s economic landscape, it has also sparked heightened tensions and security concerns. Positioned at the crossroads of Europe, Asia Minor, and Africa, the Eastern Mediterranean now serves as a nexus for political, military, and economic interests. This chapter explores how the region’s eastern and southern shores have historically been a battleground for competing political ideologies, economic systems, and military arsenals, notably those of the United States and the Soviet Union. It delves into the complexities of foreign intervention by nations and organizations, with a particular focus on the roles of the United States, Russia, and NATO’s Mediterranean Initiative. Additionally, the chapter evaluates the theoretical frameworks of international relations, including neorealism, neoliberal institutionalism, and regional security complex theories, to elucidate the dynamics of hydrocarbon competitions in the Eastern Mediterranean and their implications for energy security.

Details

Deciphering the Eastern Mediterranean's Hydrocarbon Dynamics: Unravelling Regional Shifts
Type: Book
ISBN: 978-1-83608-142-5

Keywords

Article
Publication date: 13 May 2024

Chyi Yann Chong, Chin Xuan Tan, Meng-Che Tsai, Seok Shin Tan, Hariyono Hariyono and Seok Tyug Tan

Malaysia transitions from a pandemic to an endemic state, beginning on April 1, 2022. The dietary intake and physical activity of university students were altered during the…

Abstract

Purpose

Malaysia transitions from a pandemic to an endemic state, beginning on April 1, 2022. The dietary intake and physical activity of university students were altered during the COVID-19 pandemic confinement period, but there is limited information on this topic in the post-COVID-19 period. This cross-sectional study aims to understand gender differences in dietary intake and physical activity among university students and investigate the factors influencing their body mass index (BMI) in the post-COVID-19 period.

Design/methodology/approach

The questionnaire used in this study comprised three main segments: sociodemographic information, a semiquantitative food frequency questionnaire and the International Physical Activity Questionnaire.

Findings

Results indicated that males exhibited significantly higher (p < 0.05) mean intakes of total dietary energy and macronutrients compared to females. Compared to the Malaysian Recommended Nutrient Intakes 2017, 76.4% of males and 68.8% of females had a sufficient daily energy intake. The majority of males (52.7%) and females (46.4%) were moderately physically active. Regression analysis revealed that male university students with lower fiber intake (ß = −0.309, p = 0.002) were significantly associated with higher BMI reading after confounding adjustment. However, a similar trend was not observed in female university students.

Practical implications

Understanding the gender differences in dietary intake and physical activity can provide insights into the development of effective gender-specific health promotion strategies and the formulation of policies aimed at promoting healthier lifestyles among university students in the post-COVID-19 pandemic era.

Originality/value

This study provides insights into the gender differences in the dietary and physical activity habits of university students, as well as the factors influencing their BMI in the post-COVID-19 pandemic era.

Details

Nutrition & Food Science , vol. 54 no. 7
Type: Research Article
ISSN: 0034-6659

Keywords

1 – 10 of 100