Concept Of Production Research Articles

Challenging Child-Friendly Urban Design: Towards Inclusive Multigenerational Spaces

The ongoing Covid-19 pandemic has not only presented novel challenges but has also brought to light previously unaddressed issues, such as children’s rights, their interdependence on adults, and the vulnerability of children concerning their mental well-being. The pandemic has served to accentuate the distinction between those spaces that have traditionally been designated for children or adults, and the manner in which they coexist. Some researchers posit that this phenomenon can be attributed to the emphasis placed on so-called child-friendly spaces. This article presents a critical examination of and challenge to the concept of child-friendly places, advocating for a shift towards multigenerational places. This critique draws on data from an observational study conducted in a community playground in Brno, Czechia. The concept of territorial production was employed as a tool to unveil the intricate assemblage of ever-changing control over territories and power dynamics within the playground among its visitors. The findings offer valuable insights into the practices through which children assert temporary control over spaces that are considered to be communal. Teenagers employ loud music or personal belongings to mark their territory, while younger children utilise movement to establish control. Territorial production coexists with those of the adults who also frequent the site. This highlights the necessity to create environments that are conducive to the needs of both children and adults, discouraging the design of exclusive spaces for children. The promotion of a multigenerational city can foster inclusivity, whereby the diverse needs and behaviours of different age groups within shared spaces are recognised and accommodated.

An Observer-Based View of Euclidean Geometry

An influence network of events is a view of the universe based on events that may be related to one another via influence. The network of events forms a partially ordered set which, when quantified consistently via a technique called chain projection, results in the emergence of spacetime and the Minkowski metric as well as the Lorentz transformation through changing an observer from one frame to another. Interestingly, using this approach, the motion of a free electron as well as the Dirac equation can be described. Indeed, the same approach can be employed to show how a discrete version of some of the features of Euclidean geometry including directions, dimensions, subspaces, Pythagorean theorem, and geometric shapes can emerge. In this paper, after reviewing the essentials of the influence network formalism, we build on some of our previous works to further develop aspects of Euclidean geometry. Specifically, we present the emergence of geometric shapes, a discrete version of the parallel postulate, the dot product, and the outer (wedge product) in 2+1 dimensions. Finally, we show that the scalar quantification of two concatenated orthogonal intervals exhibits features that are similar to those of the well-known concept of a geometric product in geometric Clifford algebras.

External Direct Product JU-Algebras

Lingcong and Endam introduced the idea of the direct product of a finite family of B-algebras. In this paper, we introduce the concept of the direct product of an infinite family of JU-algebras, which we call the external direct product. This is a general concept of the direct product in the sense of Lingcong and Endam. The result is based on different types of subsets of JU-algebras. These include JU-subalgebras, JU-ideals, p-ideals, t-ideals, strong JU-ideals, JU-filters, comparative JU-filters, and implicative JU-filters. Also, we introduce the concept of the weak direct product of JU-algebras. Finally, we provide several fundamental theorems of (anti-)JU-homomorphisms in view of the external direct product JU-algebras.

Fruit Wastes and Crop Residues as Nutrient Sources for Bacterial Nanocellulose Production: A Review

Nanocellulose has been developed and used as a bio-based advanced material in modern biotechnology. Lately, bacterial nanocellulose (BNC) emerged as a prominent biopolymer because of its multi-functional application in various industries, such as food, biomedical, cosmetics, and environmental. The emerging concern for large-scale BNC production is the high fermentation costs, low productivity, and expensive culture medium. To minimise this issue, agro-industrial wastes can be used as feedstock. Recently, many studies have investigated the utilization of agro-industrial wastes as potential nutrient sources for BNC production. However, a comprehensive review of BNC production from fruit wastes and crop residues is lacking. To address this gap, the current review focuses on the utilization of fruit wastes and crop residues for BNC production, including its advantages and disadvantages. This study contributes to the scientific community by (a) providing an insight into fruit waste and crop residue utilization for BNC synthesis (b) an overview on its advantages and disadvantages (c) providing recommendations and future perspectives on BNC production from agro-industrial waste utilization. The sustainable concept of BNC production utilizing agro-industrial wastes opens a way for industries to produce BNC on a larger scale.

Trends and challenges in hydrogen production for a sustainable energy future

AbstractRecurring environmental challenges and the global energy crisis have led to intensified research on alternative energy sources. Hydrogen has emerged as a promising solution, produced through electrochemical, thermochemical, and biological methods. This study presents the advantages and disadvantages of these technologies. It also provides pertinent data on hydrogen production, identifying world‐leading countries in hydrogen production, such as the USA, Japan, and China, and the government policies that they have adopted. It reports market trends such as hydrogen synthesis by water electrolysis, the high cost of the electrolyzers used, and incentives for the carbon market to become competitive with other alternative energy sources. It also highlights startups from around the world that are developing innovative methodologies for producing hydrogen. The study concludes that integrating hydrogen production concepts with social, environmental, and industry interests is essential.

RESEARCH AGENDA OF SHARIAH-COMPLIANT INVESTMENT USING BIBLIOMETRIC ANALYSIS R STUDIO

Research in the financial industry is becoming more diverse as technology and financial investment products develop. Sharia concepts in financial investment products will be assessed in the context of current financial trends, challenges, and future market opportunities. This study aims to provide an overview of these three things using Systematic Literature Reviews of previous studies. This study's findings can inform future Sharia financial product studies and financial market stakeholders' policy and decision-making

PRODUCTION AND DISTRIBUTION FROM ISLAMIC ECONOMIC PERSPECTIVE

In Islamic economics, production and distribution are the main pillars for achieving happiness, Islam bases production on the purpose of utilization, that production is a springboard for achieving value benefits and a more collective utilization goal that touches all groups. The presence of this paper is to examine the inherent (close relationship) of the concept of production and distribution based on an Islamic view. The results of this study will become a new discourse in Islamic economics literature as a contribution in the theoretical field for the perfection of the results of future studies. The type of research used is library research by referring to the written content of relevant research and then elaborating it with current phenomena. The conclusion states that Islam is a religion of rahmatan lil -' alamin which implies the distribution of goodness and benefit to every creature created by Allah SWT on earth, therefore this is a principle that is absorbed in Islamic economics so that it wards off all forms of production and distribution activities that are not in harmony with it. So that all human economic activities as caliphs must be verified based on Islamic normative values. Between the concepts of production and distribution, according to Islam, both are not a separate entity, but are a fragment. The main motive that must precede production is distribution, that someone who works has no other motive than himself and to ensure the fulfillment of the needs of others for the sake of realizing prosperity, economic justice and a balanced standard of living among all elements of society .

Concurrent removal of Fe(II), Cu(II), and Zn(II) cations from acid mine drainage by an industrial solid waste - steel slag: Behaviors and mechanisms

Acid mine drainage (AMD) contamination poses a severe environmental threat and is a significant risk to human health. There is an urgent need to develop environmentally sustainable and technically viable solutions for water contamination caused by heavy metals. In this study, steel slag (SS) was used as a secondary resource to concurrently remove Fe(II), Cu(II), and Zn(II) from AMD. Because of the loose and porous structure, abundant functional groups, fast sedimentation velocity, and excellent solid-liquid separation, SS showed exceptional removal performance for heavy metal ions. The adsorption kinetic data of Fe(II), Cu(II), and Zn(II) showed good regression with the pseudo-second-order model. Besides, the adsorption of Fe(II) by SS conformed to the Freundlich model, whereas the adsorption of Cu(II) and Zn(II) followed the Langmuir model, with the maximum adsorption amounts of Cu(II) and Zn(II) being 170.69 and 155.98 mg/g. Furthermore, competitive adsorption was observed among Fe (II), Cu (II), and Zn (II) in a multi-component system, with the adsorption priority being Fe (II) > Cu (II) > Zn (II). The removal mechanism of Fe(II), Cu(II), and Zn(II) in AMD by SS mainly includes electrostatic attraction, chemical precipitation, and surface complexation. Interestingly, the leached concentrations of Fe(II), Cu(II), and Zn(II) from the spent slag after calcination were all within the detection limit of the Chinese emission standard, demonstrating excellent environmental stability. Theoretically, this renders it a viable candidate for use as an additive in construction materials. Meaningfully, the work offers a practical approach for energy-efficient and eco-friendly heavy metal ions adsorption, and the secondary utilization of SS also contributes to the sustainable development of the steel industry. It is beneficial to implement the development concepts of clean production and efficient utilization of industrial solid waste.

Learning by exporting: the moderating role of employee human capital

PurposeThe purpose of this study is to explore the means by which exporters foster innovation via the learning-by-exporting effect and to appraise the moderating role of employee human capital in the export–innovation relationship.Design/methodology/approachLeveraging the linked-survey-secondary data from the Human Capital Corporate Panel (HCCP) spanning 2011–2017, with 890 observations from 228 Korean exporters, this study utilizes Generalized Least Squares (GLS) regression to empirically test the proposed hypotheses.FindingsThe results indicate that exporting significantly boosts a firm’s innovation performance by encouraging the generation of new concepts in products, services, technologies and/or production lines. Moreover, the presence of international talent and highly educated staff positively moderates the relationship between export intensity and innovation performance.Originality/valueBy integrating organizational learning and human capital theories, this study yields theoretical and managerial insights by elucidating the roles of exporting and human capital in advancing innovation performance, thereby guiding corporate export strategies and human resource policies.

Ru/NiMnB spherical cluster pillar for highly proficient green hydrogen electrocatalyst at high current density

Advanced OER/HER electrocatalytic alternatives are crucial for the wide adaptation of green hydrogen energy. Herein, Ru/NiMnB spherical cluster pillar (SCP), denoted as Ru/NiMnB, is synthesized using a combination of electro-deposition and hydrothermal reaction. Systematic investigation of Ru doping in the NiMnB matrix revealed significant improvements in electrocatalytic performance. The Ru/NiMnB SCPs demonstrate superior OER/HER activity with low overpotentials of 150 and 103 mV at 50 mA/cm2 in 1 M KOH, making them highly competitive with state-of-the-art electrocatalysts. Remarkably, the Ru/NiMnB SCPs exhibit a low 2-E cell voltage of 2.80 V at ultra-high current density of 2,000 mA/cm2 in 1 M KOH, outperforming the standard benchmark electrodes of RuO2 || Pt/C, thereby positioning Ru/NiMnB as one of the best bifunctional electrocatalysts. These SCPs exhibit exceptional high-current characteristics, stability and corrosion resistance, as evidenced by continuous operation at 1,000 mA/cm2 high-current density for over 150 h in 6 M KOH at elevated temperatures under harsh industrial conditions. Only a small amount of Ru incorporation significantly enhances the electrocatalytic performances of NiMnB, attributed to increased active sites and improved intrinsic properties such as conductivity, adsorption/desorption capability and reaction rates. Consequently, Ru/NiMnB SCPs present a promising bi-functional electrode concept for efficient green H2 production.

The Role of Green Supply Chain Management in Enhancing Corporate Sustainability Performance

To improve the sustainability performance of corporations in light of growing environmental concerns and stakeholder demands, Green Supply Chain Management (GSCM) has become an essential tactic. the function of GSCM in advancing sustainability through the incorporation of ecological concerns into all stages of the supply chain, beginning with product conception and sourcing and continuing through production, delivery, and disposal. Sustainable sourcing, environmentally friendly packaging, waste minimisation, and energy efficiency are some of the important practices that lead to better economic and environmental results, as can be seen from case studies and empirical research across different industries. In addition to lowering their environmental effect, organisations who adopt GSCM methods save money, boost their reputation, and encourage innovation. Nevertheless, difficulties in implementing GSCM effectively include supply chain complexity, a lack of standardised measurements, and opposition to change. companies to conquer these obstacles and make the most of GSCM to generate sustainable growth and a competitive edge in the long run.

An Entrained Flow Biomass Gasification Technology with the Fluidized Bed Concept for Low-carbon Fuel Production

For accomplishing the vision of building of a net-emission zero society, low-carbon fuels such as e-fuel, Sustainable Aviation Fuel (SAF), and chemical products generation, plays a significant role. Especially, among the low carbon fuels, SAF is the most crucial. Ammonia and electric aircraft are under way as alternatives to fossil-derived jet fuel (kerosene). However, none of these have yet found their way to commercialization. Among the SAF production technology, biomass gasification and Fischer-Tropsch (FT) synthesis technology are one of the lowest CO2 emission processes, according to Life Cycle Assessment (LCA) analysis. However, at present there are some issues about biomass grinding, tar, ash treatment, gas purification and wastewater. We, at Mitsubishi Heavy Industries (MHI) R&D laboratory have developed entrained bed gasification, adopting the fluidized bed concept in which biomass particles are recirculated in the gasifier without fluidizer. Principally desired outcomes of this development was to reduce the grinding power, simplify the structure by using atmospheric pressure process, and lower tar concentration while maintain suitable temperature to prevent ash from melting inside gasifier. Empirical and actual results showed that the developed gasifier can obtain high carbon conversion ratio and low tar as compared to the traditional gasification processes for low-carbon fuel production and produce reliably stable syngas for low-carbon fuel synthesis with single gasifier. Based on the pilot plant operation results, effectiveness of moderate (1223 – 1323 K) temperature gasification with this concept has been demonstrated too. As a conclusion, development needs and expectation of gasification technology for contributing to carbon neutral society are mentioned.

Enhanced formula-based method to estimate burnup, initial enrichment, and cooling time using limited gamma-ray source data of reference PWR spent nuclear fuel assemblies

This study proposes a framework to develop a model for estimating burnup (BU), initial enrichment (IE), and cooling time (CT) of spent nuclear fuel (SNF) overcoming the limitations of existing models in determining IE. Database (DB) of gamma-ray sources for PWR SNF was generated using ORIGAMI. Target gamma radionuclides were selected based on the ease and credibility of measurement. The concept of Product of Powers of Radioactivity (PPR) was suggested, and PPRs for modeling were selected through evaluation of all possible PPRs. Functions established for PPRs were applied to estimate BU, IE, and CT (BIC) of PWR SNF assemblies. Optimized PPR combinations for estimating BU, IE, and CT respectively, as well as three variables simultaneously with the highest accuracy, were suggested. The estimation model proposed in this study enhanced IE estimations, maintaining the reliability of BU and CT estimations. The above framework enables construction of intuitive BIC estimation models using only a small amount of data. This can help hasten the development of estimation models for SNF from various reactor types. Consequently, it is expected to contribute to the safety and safeguards of SNF management by improving the verification that SNF meets acceptance criteria and conforms to the declared information.

Pro-Ecological Consumer Behavior versus Energy Reduction and Sustainable Consumption: A Case from Poland

The concepts of sustainable consumption and production increased in popularity after the World Summit on Sustainable Development in Johannesburg in 2002. Moreover, the focus of attention was turned to the consumer and their key importance in achieving the goals of more sustainable practices. Hence, the main aim of this article is to present the influence of factors related to pro-ecological consumer behaviors on sustainable consumption including energy-use reduction. Epsilon regression was implemented as the research method. This statistical tool enabled the authors to carry out research on such complex phenomena and make the analysis immune to the high correlation among explanatory variables. Moreover, it allowed the authors to consider interactions in the set of diagnostic variables. The research presented in this paper is based on data drawn from the Barometer of Consumer Social Responsibility in Poland for 2022. As the final result of this research, a ranking of pro-ecological consumer behavior factors was constructed. On the one hand, not buying products using excessive packaging can be considered the most important factor of Polish pro-ecological consumer behaviors. On the other hand, trying to choose more ecological products with comparable prices can be regarded as the factor which has the smallest impact. Furthermore, the presented method also allowed for determining the contribution of individual factors to the pro-ecological behavior of consumers.

Euler sine product and the continued fraction of π

The Euler sine product and the continued fraction of $\pi$ are discussed in this article. Some of the infinite series for cotangent and its derivative are obtained by implementing the concept of Euler sine product and some of the standard series are derived as the immediate consequence of the main results. Furthermore, the continued fraction for odd powers of $\pi$ similar to the expression of $\pi$ derived by Brouncker is presented in this article. Meanwhile, an expression relating the Basel's constant and the cotangent function is obtained as follows: \begin{equation*} \frac{\coth{r}}{2}-\frac{1}{2r}=\sum_{n\in\mathbb{N}}\frac{2^{2n}}{2(2n)!}B_{2n}r^{2n-1}. \end{equation*}

Construction of chromium-free passivation film of pomelo peel extract on the surface of lithium-ion battery copper foil and study on anti-corrosion mechanism

Passivation treatment is the last key process to ensure the service life of copper foil for lithium-ion batteries. Although chromic anhydride commonly used in industry has an efficient passivation effect, it can threat human health and the environment. Herein, an environmentally friendly passivator is prepared from pomelo peel by a simple and economical solution extraction method, which makes copper foil have good anti-corrosion properties in air, chlorine-containing solution, and organic electrolyte. Electrochemical methods and X-ray photoelectron spectroscopy (XPS) confirm the potential of pomelo peel extractant (PP) to replace chromic anhydride as a passivating agent for copper foil. The interaction mechanism between PP and copper foil is analyzed by adsorption models, and the efficient passivation behavior of PP for copper foil is consistent with the Langmuir model. Density Functional Theory (DFT) calculations of the naringin (main component of PP) is performed to further reveal the protection mechanism of PP on copper foil. In addition, the copper foil treated by PP still has excellent electrochemical performance as lithium-ion battery current collector, indicating that the presence of PP not only protects the copper foil from corrosion, but also does not affect the conductivity of the copper foil. This research provides a new insight into the chrome-free passivation of copper foils, which is in line with the development concept of green production.

Disruption runaway electron generation and mitigation in the Spherical Tokamak for Energy Production (STEP)

Abstract Generation of Runaway Electrons (REs) during plasma disruptions is of great concern for ITER and future reactors based on the tokamak concept. The current STEP (Spherical Tokamak for Energy Production) concept design features a plasma current higher than 20 MA, thus expected to be in a regime of very high avalanche multiplication. This is confirmed by modelling runaway electron generation in unmitigated disruptions using the code DREAM, with hot-tail generation found to be the dominant primary generation mechanism and avalanche confirmed to be extremely high. Varying assumptions for the prescribed thermal quench phase (duration, final electron temperature) as well as the wall time, the plasma-wall distance, and shaping effects, all STEP unmitigated disruptions are found to generate large runaway electron beams (from 10 MA up to full conversion). The possibility of RE avoidance is first studied by idealized, i.e. radially uniform, impurity injection of a mixture of argon and deuterium, with ad-hoc particle transport arising from the stochasticity of the magnetic field during the thermal quench (TQ). Unfortunately, no such injection scenario allows runaways to be avoided while respecting the other constraints of disruption mitigation. STEP disruption mitigation system (DMS) has then been tested with DREAM, by modelling 2-stage Shattered Pellet Injections consisting of pure D2 followed by Ar+D2. Such a scheme is found to reduce the generation of REs by the hot-tail mechanism, reducing the final RE current to about 13 MA, but isn't sufficient by itself. Options for mitigating such a RE beam (benign termination scheme), as well as estimations of required RE losses during the current quench (from a potential passive RE mitigation coil) will also be briefly discussed.

The bicomplex tensor product and a bicomplex Choi theorem

In this paper we extend the concept of tensor product to the bicomplex case and use it to prove the bicomplex counterpart of the classical Choi theorem in the theory of complex matrices and operators. The concept of hyperbolic tensor product is also discussed, and we link these results to the theory of quantum channels in the bicomplex and hyperbolic case.

But where's the body? Bodies, time, money, and the political economy of post-pandemic field research

Since the pandemic, field work has been transformed by shifts in the political economy affecting the material conditions underpinning research. In this research note, a research team considers their challenges and learning in completing field studies conducted in 2022, including intensified strains on time, money, researchers’ bodies, and risks associated with illness and infection spread. We argue that a neoliberal “research super-hero” norm operates within the research community, rooted in a conception of high productivity that mingles uneasily, for many researchers, with feminist, anti-racist, and anti-colonial social justice aims and responsibilities. Our 2022 fieldwork experience led us to notice how this norm has circulated within our explicitly feminist research team and nudged us to challenge it, while raising questions about how a “research-worker” norm can best be supported.

Повышение эффективности экспорта сельскохозяйственной продукции в условиях санкционного давления

The article considers modern trends in the development of the export potential of agricultural products in the conditions of the modern concept of production and sale of products in this commodity area. The purpose of the study is to identify current trends in improving the efficiency of exports of agricultural products in the face of increased competition in the global food markets. The relevance of this study lies in the fact that increasing the indicators of exports of agricultural products will minimize the supply pressure on the domestic market of agricultural products. The article discusses issues related not only to the expansion of the export component in the activities of various forms of production of agricultural products, but also possible options for joint participation in the process of optimizing the export of food products. As part of the study, various concepts of international trade were analyzed and studied, their detailed analysis was carried out and positive aspects were identified that can be used to improve the efficiency of exports of products of the agro-industrial sector of the economy.