Circularity - Science topic

In an era characterized by rapid environmental and social changes, the intersection of entrepreneurship, innovation management and sustainable development has become increasingly important. Entrepreneurs and innovators play a pivotal role in shaping the future, as they create new business and innovator ventures, especially start-ups, products and t...

Previous and current resource-use models have led to high levels of pollution, environmental degradation, and the depletion of natural resources. The waste policy has a long history and has traditionally focused on more environmentally sustainable waste-management techniques. To be efficient in terms of resource use, the principles of the circular...

We are pleased to announce that the University of WestAttica, the National Technical University of Athens, the University of IUAV Venice, the Aristotle University of Thessaloniki and the University of L’Aquila will organise the 11th International Symposium on the Conservation of Monuments in the MediterraneanBasin (MONUBASIN). Call for abstracts...

The I2SM (International Symposium on Sediment Management) is set to make a triumphant return in 2024, with the enchanting city of Tangier as its host. With a history of 13 successful editions worldwide, I2SM is poised to reclaim the spotlight. This abstract encapsulates the key details of the event. Overview: I2SM, originating in 2008 in Lille, Fr...

This special session aims to discuss the potential and challenges associated with applying risk-based decision-making strategies that integrate the concepts of resilience and sustainability within the framework of integrity management of infrastructure systems. This session covers the theoretical and methodological developments in resilience and su...

Special Issue "Trends in Circular Economy, Innovation and Management" https://www.mdpi.com/journal/sustainability/special_issues/5N422O8391

The recycling and reutilization of spent lithium-ion batteries (LIBs) have become an important measure to alleviate problems like resource scarcity and environmental pollution. Although some progress has been made, battery recycling technology still faces challenges in terms of efficiency, effectiveness and environmental sustainability. This review...

The thermo-activated building envelopes (TABEs) possess special structural and energy features, providing a unique opportunity for the energy-efficiency measures of non-transparent building envelopes to shift towards low-carbon properties. To address the long-standing issue of heat charging efficiency that has plagued conventional TABEs (ConTABEs),...

This study numerically investigates the behaviour of an ultrasonically driven gas bubble between two parallel rigid circular walls with a cylindrical micro-indentation in one wall using the OpenFOAM software. The primary objective is to determine the conditions that facilitate the removal of particulate contamination from the indentation using the...

In this study, we present theoretical considerations of, and analyse, the effects of circular geometry on the stability analysis of semi-linear parabolic PDEs of reaction-diffusion type with linear cross-diffusion for a two-component system on circular domains. The highlights of our theoretical and computational findings are: (i) By employing linea...

Topological indices are specific chemical descriptors discovered by using graph-theoretical methods, and they are extremely useful in connecting molecules with their physical characteristics. Cycloarenes, a subclass of polycyclic aromatic hydrocarbons, are made by arranging benzene rings in a circular manner. These molecules have received a lot of...

In this study, we present a novel algorithm designed to address the computational challenges posed by the governing equations of incompressible Newtonian fluid flow, particularly of bluff bodies of circular and square in a channel. This a significant innovation algorithm is developed based on the Taylor-Galerkin/Pressure-Correction finite element m...

In the present study employed disc pressure tests to assess the effects of hydrogen embrittlement and thermal ageing on the fatigue life of a thin-wall circular part within a rocket engine. The technique compared the pressure resistance of membranes tested under helium and hydrogen, offering a simple, sensitive, and reliable method. Disc tests were...

Background Attempts to improve evening sleep hygiene have overlooked that sleep preparation behaviours are often undertaken automatically with little awareness; that is, habitually. This mixed-methods study assessed aspects of the feasibility and acceptability of a novel behavioural intervention procedure (‘script elicitation’), which encourages re...

To identify potential limitations that may impact the quality and efficiency of end-of-life vehicle (ELV) recycling and to provide solutions for effective management, this study investigates the current ELV recycling practice and the quality assessment systems around it in Malaysia by employing a mixed-methods approach. The approach encompasses qua...

With the shift of the offshore wind energy sector to deeper waters, demand for the development of more complex foundation solutions, particularly suction bucket–supported tripod/tetrapod and jacket foundations, has increased. This paper is divided into two main sections. The first part comprises a comprehensive review of the performance of circula...

We study the thermoelastic problem of an inclusion of general shape surrounded by a foreign elastic matrix under plane deformation and the influence of an in-plane far-field heat flux. The small-scale interface effects, related to not only interface conductivity, interface stretching rigidity and interface thermal expansion but also (residual) inte...

Polymeric and composite materials are ubiquitous today. However, to improve their sustainability, it is of paramount importance to make sure that their waste does not end up in landfill or in the environment, and to to find ways to recover and reuse these materials in useful and profitable applications. To contribute to building a resource-efficien...

To address the visual detection and positioning challenge of the Automated Guided Vehicle (AGV) terminal, this study proposed a high-precision target recognition and positioning strategy based on cross-layer feature fusion and eccentricity error correction. In the remote coarse positioning stage, small number of receiver domains underwent continuou...

Hollow-core anti-resonant fibers (HC-ANF) have the advantages of low scattering loss, wide bandwidth and simplicity of preparation, but are sensitive to bend, which limits their practical applications. On the contrary, hollow-core photonic bandgap (HC-PBGF) fibers have lower confinement loss and more robust bending characteristic, but exhibit unavo...

This paper aims to investigate and design a Yagi disc antenna with a variable number of director elements for Band 3 in fourth-generation long term evolution (4G LTE) mobile applications. The array technique was introduced by increasing the number of director elements to achieve superior results and better performance, such as higher gain and lower...

This study explores the potential of AI to enable circular business model innovation (CBMI) for industrial manufacturers and the corresponding AI capacities and dynamic capabilities required for their commercializa-tion. Employing an analysis of six leading B2B firms engaged in digital servitization, we conceptualize the perceptive, predictive, and...

Broadband Terahertz (THz) metamaterial absorbers with tunable absorption characteristics have been attracting a lot of attention due to their high demand and utilization in advanced optical systems. Therefore, we propose a single-layer graphene-supported metamaterial absorber with a combination of square, circular and cross-shaped meta-resonators,...

This paper introduces a method to enhance the gain of ultra-wideband (UWB) planar antennas by employing a grounded frequency-selective surface (FSS) as a reflector. The grounded FSS reflector comprises square patch structures (SPSs) of unit cells with a complete ground plane. The designed FSS utilizes miniaturized unit cells that are printed on bot...

The current study presents advanced finite element (FE) models that combine the stress weighted damage model and the crack propagation using explicit dynamic approach of commercial FE software ABAQUS. The applicability of the subroutine for ductile fracture prediction and crack propagation modeling of structural steel is confirmed by comparing the...

Bio-based plastics are attracting increasing attention due to their perceived sustainability and circularity. While enabling circularity by using renewable feedstocks, they still contribute to plastic pollution. Furthermore, their rapidly growing market will cause bio-based plastics to constitute significant fractions of plastic waste, necessitatin...

A 2×2 slot array antenna fed by microstrip line for circular polarization operated in the S band frequency range is designed in this paper. Single cross slot with single port feed as well as dual port feed is taken into consideration for realizing circular polarization and combining these two processes, the slot array is designed with single feed f...

The study gave TEM ultrastructural of vitellogenesis in Lecithochirium grandid, digenean intestinal parasite of Saurida undosquamis, four developmental phases (1, 2, 3 & 4) during vitel-logenesis. Vitelline bundles were enveloped with fine fibrous layer surrounded with separated circular muscle bands. Ultrastructural study showed that vitellocyte m...

Abstrak Penelitian ini ditujukan untuk dapat mengetahui dan mengidentifikasi pemahaman konsep mahasiswa serta miskonsepsi mahasiswa pada materi gerak melingkar beraturan. Metodologi yang digunakan dalam penelitian ini adalah metode deskriptif kuantitatif dan data penelitian dianalisis dengan menggunakan teknik pengumpulan data berupa tes. Tes diagn...

This chapter contains: A. Radial-Cylindrical Flow, Constant Production Rate, finite Reservoir with No Flow at Outer Boundary. B. Radial-Cylindrical Flow, Constant Production Rate, Infinite and finite Circular Reservoirs, Solutions at the Well, (Pt). C. Effective Drainage Radius.

This paper discusses social impact assessment practices at the urban level. More specifically, it focuses on the adaptation of the Social Return on Investment (SROI) to this end. Parisi, C. (2023). Social Impact Assessment in Circular Cities’ Ecosystems: The Case for Social Return on Investment Implementation. In L. F. Girard, P. Nijkamp, & F. No...

This paper investigates the suitability of sun-synchronous orbits (SSOs) as an injection location for responsive maneuverable spacecraft. This work identifies a range of near circular, repeating ground track (RGT) orbits that can be easily maneuvered into from SSOs. Four orbits that are simultaneously sun-synchronous and have a RGT are found, which...

Gejala kuning keriting pada daun cabai umumnya disebabkan oleh infeksi Begomovirus. Daun tanaman terinfeksi tidak hanya mengalami perubahan warna sebagai indikator rusaknya klorofil tetapi juga mengalami perubahan morfologi bentuk. Penelitian ini bertujuan menguantifikasi gejala infeksi Begomovirus berdasarkan perubahan morfologi bentuk daun menggu...

A hibridização envolvendo fontes de energia alternativa é uma tendência promissora para balancear aspectos negativos e positivos de cada fonte. As Centrais Geradoras Híbridas foram regulamentadas pela Agência Nacional de Energia Elétrica (ANEEL) em 2021, consistindo em instalações de produção de energia elétrica a partir da combinação de diferentes...

This paper presents the generation of an orbital angular momentum (OAM) wave using a wire antenna with a skew planar wheel structure at 5.8 GHz. The wire antenna consists of four arms, each of which behaves like a left‐handed circularly polarized antenna. The orientation and rotation of each arm are adjusted to obtain the desired phase shift, resul...

The automotive industry is involved in a massive transformation from standard endothermic engines to electric propulsion. The core element of the Electic Vehicle (EV) is the battery pack. Battery pack production misses regulations concerning manufacturing standards and safety-related issues. In such a fragmented scenario, the increasing number of E...

Adding the skirts around shallow foundations is a method for increasing the bearing capacity of these foundations, and skirted foundations can be considered a suitable alternative to other types, such as shallow, semi-deep, and deep foundations. In this study, the vertical bearing performance of skirted circular foundations located on clay is analy...

We describe the formation of swift heavy ion tracks in polyethylene (PE) by combining the Monte Carlo code TREKIS, which models electronic excitation in nanometric proximity of the ion trajectory, with the molecular dynamics simulating a response of the atomic system to the excitation. The model predicts circular tracks in amorphous PE but elliptic...

The adoption of electric vehicles (EVs) is increasing due to governmental policies focused on curbing climate change. EV batteries are retired when they are no longer suitable for energy-intensive EV operations. A large number of EV batteries are expected to be retired in the next 5-10 years. These retired batteries have 70-80% average capacity lef...

The middle cuneiform is the keystone of the transverse arch and is located between the medial cuneiform and lateral cuneiforms. Isolated middle cuneiform plantar dislocations are rare injuries due to their shape and ligamentous structural connections. A 20-year-old female patient was admitted to the emergency service of another clinic after a 70 kg...

This paper investigates the hydroelastic response of a submersible circular ring structure, designed for offshore seaweed cultivation, under wave action and during the submergence process. The ring structure comprises two circular HDPE pipes connected to each other by equally spaced brackets. The structure carries seaweed grow-out lines, and is kep...

Although embedment properties are vital to timber engineering, the behavior and strain distributions in wood-based panels have not been clarified in detail. Our early studies suggested four possible causes of failure behavior and strain distribution: (i) two types of failure behavior (in-plane and out-of-plane failure); (ii) enlargement of the stre...

The walled enclosure of Castanheiro do Vento (V. N. Foz Côa) is an intricate and labyrinthine constructed space characterised by a significant variety of structures. This paper focuses on large circular structures (GEC), which their size and general ground plan can identify. Through an analysis of these architectural units, this study hypothesises...

Disasters, whether natural or man-made, pose inevitable global challenges. Events such as COVID-19, earthquakes, extreme climatic conditions, and conflicts underscore the urgent demand for effective temporary housing solutions. These temporary housing units (THUs) serve as an aid in assisting displaced people to rebuild their lives as the recovery...

A conference paper from the event of GIREP 2022 (Ljubljana).

Food security depends on the implementation of sustainable development in agri-food. It is essential to determine the sustainability of the main production systems in order to establish specific measures for each territory, by virtue of correcting their negative externalities and improving the commitment of stakeholders. Therefore, this article ass...

TThe effect of geometry in micro heat exchangers is examined in the paper. The goal of the study is the maximisation of heat transfer. Solid, half-hollow and hollow circular fins are modelled and mounted on a heat sink. A high-density heat flux of magnitude is dissipated on the bottom surface by a microelectronic device. Single-phase water of Reyno...

O projeto de extensão objetivou atender escolas do município de Passos, Minas Gerais, que necessitavam de auxílio para produção de compostos orgânicos para suas hortas. Dessa forma, integrando conhecimentos de suas disciplinas, graduandos em Agronomia desenvolveram protótipos de composteiras que foram doadas para escolas. Foram ministradas oficinas...

Laser beam machining creates micro-holes with diameters less than 1 mm in the manufacturing industry. In polymer glass fiber composites, unlike defects identical during laser drilling with high power input were matrix recession, voids, extensive char deposits on the surface, and fiber swelling. However, glass fiber-reinforced composite (GFRP) is co...

This paper presents results obtained using three numerical approaches for the basal heave analysis of a hypothetical circular shaft: the Finite Element Method (FEM), Numerical Limit Analysis (NLA), and the Material Point Method (MPM). The Strength Reduction Factor (SRF) methodology was used in conjunction with the MPM, NLA, and FEM to analyze the s...

This study analyzes vibration modes in non-homogeneous orthotropic parallelogram plate with a one-dimensional circular thickness, focusing on SCCC edge condition, where C and S represent the clamped and simply supported edges of the plate, respectively. Circular Poisson’s ratio variation is considered, along with linear temperature changes. The stu...

The analysis and understanding of brain characteristics often require considering region-level information rather than voxel-sampled data. Subject-specific parcellations have been put forward in recent years, as they can adapt to individual brain organization and thus offer more accurate individual summaries than standard atlases. However, the pric...

Dear Colleagues, The current action plans regarding the circular economy call for wastewater treatment plants (WWTPs) to be turned into water resource recovery facilities (WRRFs). In this scenario, treatment activities are focused on improving water and sewage sludge quality for recovery opportunities and minimizing environmental damage. In this S...

Optical lattices have been widely used from classical to quantum physics. The tunable and scalable fabrication of lattices would be of great significance in lattice‐based multipartite applications. This work demonstrates first that a circular Airy beam (CAB), which has the peculiar properties of self‐healing and abrupt autofocusing, can be used to...

The objective of this study is to investigate the natural vibration of a rectangular plate made of orthotropic material with circular thickness (two dimensions) and temperature variation on the plate is parabolic (two dimensions) in nature. The solution to the problem is obtained by utilizing the Rayleigh-Ritz technique and the first four frequency...

Three array antennas are analyzed to expand a 3 dB axial ratio bandwidth using the method of moments. First, we design reference and present antennas comprising loop elements with a perturbation segment and quasi-two sources for circular polarization. It is found that the reference and present antennas have an axial ratio bandwidth of 9% and a 3 dB...

Offshore mooring chains are continuously subjected to cyclic environmental loadings, resulting in fatigue cracks that always develop at the surface and grow across the circular cross-sections. To analyse the fatigue crack growth in a mooring chain based on a fracture mechanics-based approach, the evaluation of stress intensity factors (SIFs) of sur...

For over a century, enzyme immobilisation has been proven to be a superior strategy to improve catalytic activity and reusability and ensure easy separation, easy operation, and reduced cost. Enzyme immobilisation allows for an easier separation of the enzyme from the reaction mixture, thus simplifying downstream processing. This technology protect...

Batteries are most advanced and key components of energy transition. Despite the technologic advances, they still have a drawback due to lack of well-developed manufacturing technologies and more importantly absence of proper EoL procedure for these expensive, labour and carbon intensive components. Currently, EoL handling trend is sending scrap ba...

O trabalho em questão tem como objetivo geral analisar o papel dos catadores de materiais recicláveis na economia circular e o impacto das associações para a formação cidadã. O aumento do consumo e a preocupação com o descarte adequado de resíduos geraram interesse na economia circular como alternativa sustentável, assim como a necessidade de explo...

This version made a revolution in the added mass field. Version 0.8.5 The reason that these developments, first depicted in this book, is because of the new direct examination method. This innovative method also has a byproduct that shows a way to calculate the circular segment centroid. Nevertheless, the new technique to calculate the centroid is...

Background: The purpose of this study was to investigate the changes in macular microvasculature using optical coherence tomography angiography (OCTA) in association with functional changes in patients with proliferative diabetic retinopathy (PDR) treated with panretinal photocoagulation (PRP) with a follow up of 12 months. Methods: The participant...

La evaluación de las gónadas en reptiles mediante ultrasonografía se ha utilizado ampliamente en quelonios, serpientes, yacarés y en algunas especies de lagartos. Sin embargo, en el examen ultrasonográfico de los ovarios, los cambios foliculares ecográficos y la correlación de estos cambios con la vitelogénesis presentan diferencias interespecífica...

This study investigates the stability of an unlined circular tunnel subjected to surcharge loading over the rock mass surface. A plane strain analysis has been performed following the Generalized Hoek–Brown (GHB) failure criterion by adaptive finite element limit analysis (AFELA). An extensive parametric study was conducted to investigate the impac...

In the current research, modes of frequency of isotropic tapered triangular plate having 1-D (one dimensional) circular thickness and 1-D (one dimensional) linear temperature profile for clamped boundary conditions are discussed. Authors implemented Rayleigh Ritz technique to solve the frequency equation of isotropic triangular plate and computed t...

This study aimed to carry out the morphological characterization of the Seridó River Basin (RN/PB), in the Brazilian semi-arid region, using remote sensing and geoprocessing techniques through the free GRASSGIS software, in interface with QGIS, in order to analyze morphometric parameters such as drainage density, compactness coefficient, shape fact...

This research paper aims to provide a comprehensive analysis of advancements and challenges in electric vehicle (EV) battery technologies, with a specific focus on efficiency, environmental impacts, and recycling. As the demand for EVs rises, it is crucial to assess the current state of battery technologies and explore potential avenues for improve...

Although the potential for cities and regions to contribute to global mitigation efforts is widely acknowledged, there is little evidence on the effectiveness of subnational mitigation strategies. Here we address this gap through a systematic review of 234 quantitative mitigation case studies. We use a meta-analytical approach to estimate expected...

International investors and policymakers of sustainable finance has emerged as a major topic of interest in a economy of nation. Environmental, Social and Governmental considerations are incorporated into business decisions, economic growth, and investment strategies to create sustainable finance. The Center for Sustainable Finance (CSF) is an info...

The enhancement of scattered field from cylindrical structures in the presence of SPP waves is analyzed. The SPP waves are excited using the Turbadar-Kretschmann-Raether (TKR) configuration and a cylindrical wave approach (CWA) is implemented to obtain the scattered field. Different arrangements such as a corner reflector and a strip are simulated...

Vibration exciters are of most important units of any vibratory equipment defining its design peculiarities, operational features, functional purpose, and performance characteristics. Among a great variety of vibration exciters, the unbalanced rotors are of the most widely used. The present research considers the possibilities of providing specific...

Métodos de fabricação envolvem técnicas para produzir diversas peças e produtos, evoluindo com as mudanças tecnológicas, econômicas e sociais. A metalurgia do pó, uma metodologia notável, utiliza a sinterização de partículas para criar peças sólidas complexas, precisas e eficientes, superando métodos tradicionais baseados em remoção de material. Em...

Collected and analyzed data on the largest tsunamis in the world. It is shown that the usual opinion about the increasing number of tsunamis in time is confirmed. For the deadliest Tsunami-2004 in Southeast Asia, information is summarized from many different sources: media, popular and scientific journals, etc. The scientific and geological base of...

Adequate water, electricity, and food are essential for sustainable development. Regional conflicts intensified by global water, energy, and food shortages necessitate a rethinking of the security and interdependence of these resources. However, most earlier scholars concentrated on the subsystems of the water-energy-food nexus (WEF nexus), lacking...

At present, most of the immersive interactive nodes in anatomy experiment teaching are set as single-target deployment, and the frequency of teaching interaction is limited, resulting in the reduction of interaction times. Therefore, this paper proposes the analysis and research on the immersive interactive method of simulated anatomy experiment te...

In forensic blood pattern analysis, the conventional trajectory reconstruction methods are based on trigonometric principles. Most of these approaches do not take into account the fluid properties of blood, a non-Newtonian fluid, leading to enormous uncertainties. For perpendicular impact blood stains, simple mathematical models based on fluid dyna...

This paper proposes a neural network model that estimates the rotation angle of unknown objects from RGB images using an approach inspired by biological neural circuits. The proposed model embeds the understanding of rotational transformations into its architecture, in a way inspired by how rotation is represented in the ellipsoid body of Drosophil...

Implementing blockchain technology in waste management is a novel approach to environmental sustainability and accountability challenges in our modern world. Blockchain, a technology that enables decentralized and immutable ledgers, is now being re-imagined as a tool to revolutionize waste management. This innovative approach aims to improve waste...

This paper explores the prediction of axial strength of circular concrete-filled stainless-steel tubular (CFSST) columns, employing advanced machine learning techniques, including Gaussian Process Regression (GPR) and Extreme Gradient Boosting (XGBoost). The dataset comprises 129 columns from experimental tests, with only 12 of them being long or s...

In this study, we report the complete chloroplast genome of Actinidia arguta var. purpurea. The chloroplast genome is 157,369 bp long as the circular (GC ratio is 37.22%). It has four subregions: a large single-copy (LSC) region of 88,609 bp, a small single-copy (SSC) region of 20,470 bp, and two inverted repeat regions (IRs) of 24,145 bp in each....