Circularity - Science topic

The Advanced Training in Laparoscopic Suturing (ATLAS) curriculum is a proficiency-based program designed to improve laparoscopic skills through a series of six tasks. Task 1 requires driving a needle through 6 standardized holes, each oriented at different angles on a circular platform. Performance measures include task completion time and errors,...

To teach advanced laparoscopic knot-tying and suturing skills, the Advanced Training in Laparoscopic Suturing (ATLAS), a six-task proficiency-based curriculum was introduced. The Needle Handling task requires needle maneuvering through six holes on a circular platform. Performance is manually evaluated through video review for completion time and e...

The Advanced Training in Laparoscopic Suturing (ATLAS) curriculum was developed to improve laparoscopic skills via a proficiency-based approach through six distinct tasks. Task 1 involves passing a needle through six holes positioned at various angles on a circular platform. Performance is assessed based on the task completion time and the number o...

A metasurface inspired circularly polarized (CP) compact patch antenna with high gain for fifth-generation communication systems is designed and implemented in this article. The proposed structure features a corner truncated patch antenna and a metasurface of 3×3 double sided identical circular metallic patches. The attribute that puts this design...

𝐂𝐚𝐥𝐥__𝐟𝐨𝐫_𝐐𝐮𝐚𝐥𝐢𝐭𝐲__𝐁𝐨𝐨𝐤__𝐂𝐡𝐚𝐩𝐭𝐞𝐫𝐬 We (Dr Rubee Singh, Dr Wasswa Shafik and Prof Vikas Kumar ) are cordially inviting you to submit your quality chapter for our new upcoming edited book entitled "Blockchain Technologies for Smart Circular Economy & Organisational Sustainability" by Springer Nature. The deadline for full chapter 𝐬𝐮𝐛𝐦𝐢𝐬𝐬𝐢𝐨𝐧 𝐢𝐬 𝐉𝐚𝐧𝐮...

Recycling of waste polymers for valuable use is important for circular economy and environmental sustainability. This study introduces a novel approach to evaluating the compatibility between waste polymers and asphalt binders using advanced molecular representation models. The solubility parameters of waste polymers were predicted using traditiona...

This paper aims to develop and validate a comprehensive framework for managing and assessing circular maturity in industrial ecosystems at the corporate level. Leveraging theoretical constructs related to principles, factors, strategies, and circular business models, the paper introduces a methodological approach for evaluating circular economy dev...

Greater use and reuse of electric vehicle batteries is needed for the ongoing electrification of the transport sector towards a net-zero and carbon-low economy. Such battery second-life uses and later recycling requires an ecosystem with actors having reliable battery tracking and equitably sharing usage information. However, existing studies do no...

Mortars are the binding materials used in the construction of masonry. Their composition comprises a homogeneous blend of cementitious materials along with inert fine aggregate fraction and water. The selection and composition of mortar are pivotal in masonry construction, as they have a significant impact on various characteristics, including stre...

This study investigates the impact of drying on the shape and size of mung beans (Vigna radiata L.), which are well-regarded for their nutritional, medicinal, and agronomic benefits. Understanding their physical properties at varying moisture levels is crucial for improving agricultural practices from planting through post-harvest. Initially harves...

This paper elucidates the inseparable connection between the pursuit of a more ecologically sustainable society and the quest for socioeconomic justice. It also demonstrates why Unconditional Basic Income (UBI) is an effective policy to act on both fronts. First, the corresponding theory on environmental and socioeconomic oppression sheds light on...

With resources dwindling and the environment deteriorating, the construction sector around the world is at a crossroads. Façade engineering becomes an important field for sustainable practices in this environment. In order to improve the sustainability and economic feasibility of building envelopes, this review paper delves into how Circular Econom...

Increasing waste production presents substantial environmental and public health obstacles, necessitating inventive and sustainable waste management approaches. This chapter explores the fundamental concepts of circular economy and how it may be used to change waste management systems from linear disposal methods to sustainable and efficient models...

Shape of soil grains has a major role in the characterization of its behavior. This important feature has an appreciable impact on all mechanical properties of granular soils. In order to accurately capture such an important contribution, the grain morphological features should be carefully analyzed and described in a systematic manner. The present...

Open dumping of municipal solid waste (MSW) is prevalent in India, posing significant environmental and health hazards. This research advocates for Integrated Solid Waste Management (ISWM) as a sustainable solution to mitigate these impacts. We project a dramatic rise in MSW generation by 2031, highlighting the urgency for action. Through life cycl...

Our current linear systems of production and consumption are based on a “take-make-waste” approach that prioritises volume over value. This approach is exacerbating climate disasters and poses a massive threat to the ecological systems necessary for human survival. At present we consume more resources every year than the planet can sustain in the l...

This article explores how digital industrial platforms can support data ecosystems in the circular economy, addressing the need for more sustainable economic models that aim to minimize waste, reuse materials, and improve resource efficiency. In this context, we present an ecosystem process model that maps the lifecycle of complex products, such as...

Given the access to citizens' data, data ecosystems have the potential to address important societal problems. Thus, it is no surprise that we observe a shift toward opt-out models of data sharing worldwide. However, little is known about how citizens perceive and act in these settings. This study conducts an in-depth study on a health data ecosyst...

In this study, 5 different Al2024/FRP/Al2024 metal stacked composites were produced and their machinability by abrasive water jet machining (AWJM) method was investigated. Synergistic interaction of these materials offers new and improved properties, but machinability remains an area of research due to widely varying mechanical properties. The effe...

The integration of Environmental, Social, and Governance (ESG) factors and circular economy practices in family-owned SMEs is increasingly recognized as essential for achieving sustainability. This study delves into how these practices can be incorporated from an Islamic perspective, providing guidelines that align with Islamic values. The urgency...

The most The global market is undergoing rapid and continuous changes, making the adoption of circular business models a crucial strategy for the survival and growth of supply chain participants. Although the transition to a circular business approach is a complex and demanding process, it is essential for companies facing limited natural resourc...

Hierarchical self‐assembly driven by non‐covalent interactions is a prevalent strategy employed by nature to construct sophisticated biomacromolecules, such as proteins. However, the construction of protein‐like superstructures that rely on weaker dispersion forces‐driven hierarchical assembly remains largely unexplored. Here, we report the first e...

The focus of this work is the study of biodegradable polymer producing from paper waste industry, having theorical articles as basis to explain the concepts and the transformation abou paper waste turning into biodegradable bioplastic, and conventional plastic as something to be replaced. Bioplastic is a kind of biodegradable polymer composted by o...

The WORLD7 model was used to assess the sustainability of production and market supply of germanium. The model incorporates dynamic market dynamics, mass balance, and endogenous dynamic market prices based on supply and demand dynamics. The results suggest that there will be germanium scarcity in the near future, and a price increase is predicted....

Eco-industrial parks (EIPs) are considered effective means to enhance economic growth, improve competitiveness, maintain environmental quality, and improve social quality. They have many direct and indirect benefits, which makes the majority or most countries seek to implement these projects. Given its importance, international organizations such a...

Resumo Objetivo Comparar os métodos de fixação de fraturas do pilão tibial entre pacientes atendidos em um hospital. Métodos Foram analisados os prontuários de 28 pacientes que realizaram procedimento cirúrgico para fratura do pilão tibial, sendo 15 deles tratados com fixador externo circular e 13 com fixação interna por placa e parafusos. Foram an...

9. Electro-mechanics Micro-electric processes are manifest in practice on moving bodies or electric circuits. The moving charge particles or bodies, and the currents in the circuits, act by the forces upon similar objects. Inside a neutral body, with the zero summary current, the sum of micro-forces around particles is manifest by mechanical inert...

In this work, a novel fractal multiple-input multiple-output (MIMO) antenna is designed for ultrawideband (UWB) applications. The radiating structure of the MIMO configuration employs a circular fractalradiating structure excited through a modified coplanar waveguide (CPW) feed. The fractal shape is designed by employing small circular rings inside...

Given in the plane a set of points and a set of halfplanes, we consider the problem of computing a smallest subset of halfplanes whose union covers all points. In this paper, we present an \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \use...

The Future Circular Hadron Collider design studies proposed a novel dual chamber beam screen consisting of copper and stainless steel. However, one concern about the current design is the inherent resistive wall beam impedance of the beam screen, which may not be low enough to guarantee stable beam operation especially critical on the vertical plan...

This chapter focuses on a relevant topic, an element of India's freedom struggle called Khadi or the homespun cloth made of cotton on spinning wheels as an example of product stewardship in terms of ethics and environmental impact. Product stewardship is identified as businesses with commitments to a healthy, safe, and environmentally friendly soci...

O presente estudo teve como objetivo descrever a morfologia polínica de 11 espécies de Asteraceae ocorrentes na restinga da APA Rio Capivara, Litoral Norte do estado da Bahia. Os grãos de pólen foram acetolisados, mensurados, tratados estatisticamente, fotomicrografados e descritos sob microscopia de luz. Os grãos de pólen analisados variaram entre...

This study experimentally investigated the transient flow characteristics of single and twin parallel circular impinging jets using Particle Image Velocimetry (PIV) and Proper Orthogonal Decomposition (POD). High spatiotemporal resolution data were collected to analyze and visualize the distribution and interactions of multi-scale vortex structures...

Despite the newly acquired information with increasing studies in Türkiye, archaeological evidence regarding ceramic production in some regions and periods is still not sufficient. Although our knowledge about prehistoric and protohistoric pyrotechnology increases, we can currently say little about the size of ceramic production, the settlement and...

This article explores the use of acoustical metamaterials to design lenses in the megahertz frequency range of relevance to applications in nondestructive testing and medical imaging. In particular, the effect of manufacturing errors on their focusing performance is quantified. A rapid method for including manufacturing errors is described and this...

Anchored in the argument that, since the School of Port Royal, there has been a pendular circularity between Logic and Rhetoric, based respectively on a universal theory of ideas or on individualistic subjectivism, Michel Pêcheux (1982) uses relative clauses as a linguistic phenomenon to support the development of a materialist theory of discourse...

The built environment significantly contributes to current socioenvironmental crises, necessitating systemic change. Circularity and the commons are re-emerging as potential pathways for such transition. A circular built environment (CBE) aims to close resource loops, but its implementation is often slow and neglects social and local aspects. The c...

Reinforced concrete (RC) deep beams are used in offshore platforms, bunker walls, and building load-bearing walls. Web openings are often necessary for accessibility or essential services. However, enlarging these openings due to architectural or mechanical requirements or changes in building function can significantly decrease shear capacity, posi...

Lattice structures exhibit periodicity along three orthogonal axes, which limits their mechanical isotropy and design flexibility. In this study, the lattice structures with multifold rotational symmetries were proposed and designed based on body-centered cubic (BCC) structures. The specimens of the proposed structures were fabricated through laser...

The influence of the manufacturing strategy of Invar 36 alloy parts manufactured by Directed Energy Deposition by Arc (DED-Arc) also known as wire and arc additive manufacturing (WAAM) using cold metal transfer (CMT) technology has been investigated. This study focuses on the influence of applying different deposition strategies on the resulting mi...

We introduce a hybrid framework to model the fluid dynamics of free convection condensation of saturated steam outside a circular cylinder. The liquid film is modeled analytically, and the adjacent vapor flow field is resolved numerically. The model incorporates temperature-dependent thermophysical properties of the condensate. We explore the subtl...

This paper presents a holistic framework for advancing sustainable practices in catalyst design, emphasizing the integration of lifecycle analysis (LCA), recyclability, and circular economy principles. Catalysts are critical in numerous industrial processes, but their production, use, and disposal often lead to significant environmental impacts. Th...

The shear stress on isotropic curved beams with compact sections and variable thickness is investigated. Two new solutions, based on Cook’s proposal and the mechanics of materials approach, were developed and validated using computational finite element models (FEM) for four typical cross-sections (rectangular, circular, elliptical, and triangular)...

Advances in wireless communication systems require multifunction‐integrated optical devices to increase information capacities. However, the wavefront‐shaping metasurfaces thus far face challenges in manipulating orthogonal polarization independently and achieving versatile wavefront shaping simultaneously. Here, the scheme of chip‐integrated multi...

The agricultural sector is challenging to decarbonise due to its reliance on heavy machinery and fossil fuels, which face issues when decarbonising via methods such as electrification. However, agriculture provides opportunities to generate renewable energy via biomass sources due to their abundance within this sector. This feasibility study used a...

While a circular economy (CE) paradigm shift has gained significant momentum among academics, practitioners, and policymakers, theory regarding its social aspects remains scant, especially theory based on an ethical, micro-level perspective. Circular consumption, referring to those consumption practices that aim to extend the lifetimes of objects a...

Conference report: Circular economies? Material resources and their utilisation in Late Antiquity and the Early Middle Ages (Bochum, Oct. 7-8, 2024).

Anchored in the argument that, since the School of Port Royal, there has been a pendular circularity between Logic and Rhetoric, based respectively on a universal theory of ideas or on individualistic subjectivism, Michel Pêcheux (1982) uses relative clauses as a linguistic phenomenon to support the development of a materialist theory of discourse...

As sustainability challenges become more urgent, concerns about resource depletion and the need for material recovery have brought recycling to the forefront of circular economy discussions. Compared to other developed nations, the US has underperformed in recycling, with its rate remaining relatively unchanged over the last two decades. However, l...

Numerical and experimental investigations on spray characteristics and mixing mechanism of a backpressure-driven liquid jet in a tandem backward-facing step cavity were conducted in this study. The dynamic atomization process of a liquid jet driven by backpressure was accurately captured using a compressible two-phase flow large eddy simulation bas...

Abstrak Masalah sampah sembarangan di Kota Medan telah menjadi isu yang signifikan, dengan sekitar 60% dari total sampah yang dihasilkan setiap harinya tidak terkelola dengan baik. Penelitian ini bertujuan untuk mengevaluasi efektivitas penerapan hukum dalam menanggulangi sampah sembarangan di Kota Medan berdasarkan studi literatur yang tersedia. S...

The incorporation of new technologies and materials, as well as the rapid evolution of products, makes it necessary to guide the product design and development process from bio-inspired perspectives that promote a circular economy. Among the proposals based on a bio-inspired solution is the framework called the Genomic Model of Eco-innovation and E...

Keywords: Multiple value, Integrated reporting, OK!-method, New Business Models (NBMs), Circular Economy, Sustainability, Triple Ps.

Society’s most well-intended efforts to solve sustainability challenges have not yet achieved the expected gains due to rebound effects (i.e., negative consequences of interventions arising from induced changes in system behaviour). Rebound effects offset about 40% of potential sustainability gains, but the understanding of design as a key leverage...

Local scour induced by strong currents has become one of the major challenges for sea-crossing bridges built for the convenience of transportation across bays. To mitigate the local scour of the sea-crossing bridge foundation, this study optimized the design and geometry of the upper part of the skirted caisson and proposed a new type of foundation...

To investigate the distribution characteristics of the micropore structure in high-performance self-compacting concrete (C80), high-resolution X-ray computed tomography, AVIZO software, and scanning electron microscopy were employed to observe and analyze the internal pore structure of C80 self-compacting concrete specimens. The main conclusions ar...

The five-bar linkage, used in the form of a planar manipulator, benefits from easy controllability and relatively simple kinematic structures, which mean that it can be used in several applications in robotics, rehabilitation, and haptic devices, etc. This paper proposes an optimal synthesis method for a symmetrical five-bar linkage of type 5-RRRRR...

Due to the similar order of magnitude of the defect size and the detection wavelength, when detecting micro-/nano-scale defects on the surface of a fine optical component, the intense modulation of the optical field poses challenges in correlating imaging widths of defects with actual widths. A dark-field scattering imaging (DFSI) model, based on t...

Realization of multichannel spin-dependent splitting that allows for wavefront shaping is urgently required in applications based on the photonic spin Hall effect (PSHE). In this paper, we implement the multichannel spin-dependent splitting that supports preset laser modes by using a single-layer dielectric metasurface. This metasurface introduces...

Controle biológico aplicado da mosca-da-fruta Ceratitis capitata (Diptera: Tephritidae) com uso de parasitoides

La presente investigación analiza el impacto de la economía circular en la sostenibilidad de las cadenas turísticas, considerando las dimensiones ambiental, económica y sociocultural. El objetivo fue identificar cómo la adopción de prácticas circulares influye en la sostenibilidad del sector turístico en diversas regiones con alta actividad turísti...

Despite their importance in a wide range of living organisms, self-cleaving ribozymes in the human genome are few and poorly studied. Here, we performed deep mutational scanning and covariance analysis of two previously proposed self-cleaving ribozymes (LINE-1 and OR4K15). We found that the regions essential for ribozyme activities are made of two...

Climate change, driven by human-induced greenhouse gas emissions, poses a critical threat to the planet, prompting countries worldwide to pledge carbon neutrality by the mid-century. This literature review identifies and analyzes strategies and technologies for achieving carbon neutrality across various sectors and regions. The study aims to determ...

Whereas post-mortem bioerosional features such as bivalve, sponge or worm borings are frequently preserved in ancient corals, reports of ante-mortem skeletal anomalies on Cretaceous specimens are rare. Here, we document the occurrence of fossil skeletal lesions produced during the life span of the colonies in exceptionally well-preserved Aptian (Ea...

Este artículo aborda un proyecto sobre el desperdicio de salvado de arroz, un subproducto rico en nutrientes de la industria arrocera que, a menudo, se descarta, perdiendo su potencial como recurso valioso. Busca reducir este desperdicio, promover la alimentación saludable y ofrecer alternativas nutritivas, económicas y sin gluten para la población...

We investigate the emission of circularly polarized photons from a magnetized quark-gluon plasma with nonzero quark-number and chiral charge chemical potentials. These chemical potentials qualitatively influence the differential emission rates of circularly polarized photons. A nonzero net electric charge density, induced by quark-number chemical p...

The waste electrical and electronic equipment (WEEE) recycling industry in China has been booming since the beginning of the millennium and plays a critical role in pollution control and resource efficiency. And the fast growth of the WEEE recycling industry reflects the development of China’s circular economy. This paper gives an outline of China’...