Concept Of Energy Research Articles

The energy of multi-valued neutrosophic matrix and neutrosophic hesitant matrix and relationship between them in multi-criteria decision-making

The concept of energy in graphs and matrices is frequently used in all application fields. The energy of a matrix is an extended version of the energy of a graph. The neutrosophic matrix energy concept needs to be more noticeable in multi-criteria decision-making environments. This study presents the concept of the energy of a multi-valued neutrosophic matrix. The upper and lower bounds of the proposed energy were determined. The connection between the neutrosophic hesitant matrix and the multi-valued neutrosophic matrix is provided. Since the parameters of the two matrices differ in truth, indeterminacy, and false entries, the matrix is converted into a single-valued form, and then the energy was calculated. The MCDM problem was addressed with the proposed energy, which is solved by a novel decision-making method. The task is to select a machine from a group of repaired machines in a particular industry that is in good condition. The final ranking values are calculated by the ranking energy formula that decides which is preferred. Then the comparative results were given to demonstrate the accuracy of the proposed energy outcomes.

Understanding the concept of energy through definitions, drawings, and metaphors

Energy is a concept frequently encountered both in daily life and in various disciplines. Despite such a wide range of scope, conceptualizing it might be challenging at times. This study aims to investigate high school students’ views on the concept of energy through a set of various paper-and-pencil tests. For this purpose, 654 high school students from the ninth, 10th, and 11th grades were asked to explain the concept of energy using definitions, drawings, and metaphors. According to the results, the students had similar misconceptions about their definitions, drawings, and metaphors. However, situations from everyday life were depicted, particularly in drawings and metaphors. Misconceptions decreased considerably in the upper classes, and answers were presented that were close to scientific knowledge, suggesting that, over time, students’ abstract thinking skills improve, the knowledge gained at school contributes to explaining the situations in daily life scientifically, and scientific facts are conceptualized.

Beyond bungee jumping: Designing bungee cord to teach hooke’s law in problem-solving lab

Physics instruction is critical for helping students develop thinking skills and practical skills through the engineering design process, however, they often find it difficult to apply the concepts of physics to solving real-world problems. Bungee jumping is one of the favorite real-world applications in Hooke’s law as it requires a physics calculation to design the bungee cord required to meet the specified safety criteria. The purpose of this study, therefore, was to investigate 35 high school student’s mastery of concepts on the behavior of the spring through the implementation of an engineering design process activity in the problem-solving laboratory instruction. A pre-experimental study with one group post-test design only was used to outline a problem-solving laboratory instruction and to assess students’ mastery of concepts after the instruction. We found that only 48% of students or fewer were able to make effective use of Hooke’s law to propose a solution and design a model related to the bungee cord problem. Although most students seemed to acquire a reasonable grasp of the energy concepts to solve the quantitative problems, it was found that there was a widespread tendency to improperly apply the conservation of energy concept to the context of jumping from a height in a qualitative problem. However, the physics behind designing bungee cords can be used to engage students in learning Hooke’s law. Such a hands-on pass-fail test of the student solutions provides them with more meaningful real experiences in applying physics calculation to a real solution.

Assessment of students' science literacy skills using diagnostic items on the concept of energy with Rasch modeling

This study aims to describe the quality of diagnostic items of the concept of Energy developed based on Rasch modeling and describe students' science literacy skills on the concept of Energy. The research method used in this research is descriptive. Research data were collected through online and offline tests and analyzed using the Rasch model and diagnostic items. The results showed that (1) The science literacy test instrument made was valid with an excellent category and a reliability value of 0.97, meaning that the quality of the items in the instrument was very good. This instrument can be used to assess students' abilities at all levels of ability, from those with low to high abilities; (2) For Person reliability or the quality of students' answers, the reliability value is below 0.30, meaning that the consistency of answers from students is low; (3) The quality of item questions based on the Rasch model from the item measure statistics results that all items meet the MNSA outfit criteria and no negative PTMEA Corr occurs. That is, all items are non-deviant, appropriate, and valid. This is also confirmed based on the bubble chat, where there are no items that are overfit or underfit; (4) The Rasch model makes very thorough and good measurements to measure the difficulty level of items and person's ability; (5) Based on the measurement results, it was found that the science literacy ability of students at SMPN 1 Paleleh was divided into low ability as much as 1.6%, moderate 53.6%, high 43.8%, very high 0.82%.

Effect of Cosmic Plasma on the Observation of Supernovae Ia

In observational cosmology, a supernova Ia is used as a standard candle in order to extend the Hubble diagram to a higher redshift range. Astrophysicists found that the observed brightness of high redshift supernovae Ia is dimmer than expected. This dimming effect is considered observational evidence for the existence of dark energy in the universe. It should be noted that this conclusion is based on an assumption that the mass density of the cosmic plasma is very small. Therefore, the dimming effect caused by the Compton scattering of free electrons in cosmic plasma can be neglected. X-ray observations suggest that the mass density of the cosmic plasma may be very large. In theory, the observed dimming effect of high redshift supernovae Ia may be caused by the Compton scattering of free electrons in the cosmic plasma. In this paper it will be shown that this idea is reasonable. Therefore, there is no need to introduce the confusing concept of dark energy into cosmology.

Developing a novel energy-based approach for measuring mental workload

Minimal research has been conducted to develop non-invasive processes for quantifying and evaluating worker mental workload - a critical concern - at the task level in the construction industry. One reason for this gap in research is the complex and dynamic nature of the construction process, which makes construction work more complicated to measure and predict compared to work in other industries. This paper presents a novel approach and corresponding conceptual model to quantify and evaluate construction worker perception of mental workload at the task level using the energy concept. A conceptual process for assessing mental workload (MWL), i.e., the feeling of stress, pressure, and being overwhelmed due to the task nature, factors, conditions, and resources that accompany the performance of the task, was developed from extant research and interviews. The Delphi method was utilized to characterize the energy-based model and provide initial verification. The results from the literature review, expert insight, and four rounds of the Delphi survey revealed 14 constituents, 51 components, and one metric for each component to measure the level of MWL felt by a worker. These constituents, components, and metrics were used to develop a model for measuring construction worker MWL. This study contributes to knowledge by developing a novel non-invasive method for assessing potential task-level MWL using an energy-based model. The energy-based assessment model contributes to practice by providing a tool that could be used to measure the potential impact of construction tasks on workers perceived mental workload.

International Comparison of Weather and Emission Predictive Building Control

Building operational energy alone accounts for 28% of global carbon emissions. A sustainable building operation promises enormous savings, especially under the increasing concern of climate change and the rising trends of the digitalization and electrification of buildings. Intelligent control strategies play a crucial role in building systems and electrical energy grids to reach the EU goal of carbon neutrality in 2050 and to manage the rising availability of regenerative energy. This study aims to prove that one can create energy and emission savings with simple weather and emission predictive control (WEPC). Furthermore, this should prove that the simplicity of this approach is key for the applicability of this concept in the built world. A thermodynamic simulation (TRNSYS) evaluates the performance of different variants. The parametrical study varies building construction, location, weather, and emission data and gives an outlook for 2050. The study showcases five different climate locations and reveals heating and cooling energy savings of up to 50 kWh/(m2a) and emission savings between 5 and 25% for various building types without harming thermal comfort. This endorses the initial statement to simplify building energy concepts. Furthermore, it proposes preventing energy designers from overoptimizing buildings with technology as the solution to a climate-responsible energy concept.

Specific Energy Concept Applied to Electronic Equipment in Industrial Processes Having Distributed Generation

Appliances used in commercial and industrial networks, being very sensitive equipment, are affected by voltage sags. Information about sensitivity is normally presented in time/voltage graphs, where the voltage is of a constant magnitude. This is not the case when distributed generation (DG) is involved, where due to the distributed generator disconnection the voltage magnitude could have one or two sharp changes. The methodology presented here, based upon the I2 t and V2 t change with time, allows the study of such phenomenon. Also the time-voltage and time-current coordination could be studied easily by using the proposed methodology

Mechanisms of Emotional Experiences of Online Spectators of E-Sports Events From the Perspective of Interactive Ritual Chain

E-sports events play a crucial role as significant entertainment activities and platforms for emotional interaction among the public. This study seeks to delve into the processes underlying the emotional experiences of online spectators during interactive rituals within e-sports events. It employs the core concept of emotional energy within interaction ritual chains as framework for analysis. To accomplish this, we conducted one-on-one semi-structured interviews with 20 online spectators actively engaged in the League of Legends professional league. These interviews specifically targeted their emotions, feelings, evaluations, behaviors, and other relevant experiences both preceding, during, and subsequent to spectating. Our analysis revealed four distinct stages within the emotional energy change process: emotional arousal, immersion, climax, and continuity. These stages collectively culminate in the formulation of a dynamic, continuous, and cyclical emotional energy model. Notably, spectators adeptly employ various emotional regulation strategies to mitigate the impact of disruptive factors. The integration of ritual symbols, coupled with the positive feedback loop of emotional energy, serves to connect the five identified stages and establish a cohesive cyclic upward mechanism. These findings not only offer unique insights into the micro-level emotional experiences of online spectators but also hold practical implications for the effective management of e-sports events.

Circular disk solar absorber heater design for industrial heaters based on Fe2O3–Si structure

Industrial heaters nowadays work on renewable energy concepts and one of the important green energy sources is solar energy and we have used solar energy to design industrial heaters. The solar absorber converts the solar energy into heat which is used for industrial heaters. We developed a new solar absorber construction with three different layers by using different materials for each layer construction. Aluminium (Al) is for the top (resonator) layer, iron (III) oxide (Fe2O3) is for the middle (substrate), and silicon is used in the ground (based) layer respectively. A thin graphene layer is constructed between the Al resonator and the Fe2O3 substrate sections to develop better absorption by this design. In the wavelength range (μm) of 1.86 and 3, the explored absorption rate is 95.43 % with a 1740 nm bandwidth. The absorption rate performs above 97 % (97.23 %) at a 540 nm bandwidth with a wavelength (μm) difference between 1.96 and 2.5. The overall absorption for design explores 91.23 % (greater than 90 %) with a 2800 nm bandwidth range by the wavelength contribution from 0.2 to 3 μm. To highlight the explored amounts in variation, the four high wavelengths (in micrometers) are selected with λ1 = 0.45, λ2 = 1.1, λ3 = 2.1, and λ4 = 2.5 respectively. Concerning the presentation of this design, the construction steps from the beginning to the complete stage distribution, Air Mass (AM) exploration and equations, parameter analysis with the respective color extractions, polarization situation by changing incident angle (degree) from 0 to 80, electric and magnetic field analysis section, and a comparison table will be included in this work. This design can be achieved in the development of renewable energy such as the large amount of electricity generation by solar energy (green energy) systems, the process of heating and cooling systems of water, and multiple transportation systems.

Piezoelectric generator harvesting bike vibrations energy to supply portable devices

With the decrease in energy consumption of portable electronic devices, the concept of harvesting renewable energy in human surrounding arouses a renewed interest. In this context, we have developed a piezoelectric generator that harvests mechanical vibrations energy available on a bicycle. Embarked piezoelectric transducer, which is an electromechanical converter, undergoes mechanical vibrations therefore produce electricity. A static converter transforms the electrical energy in a suitable form to the targeted portable application. Values of generated electrical power are reported and commented.

Combined Physics- and Data-Driven Modeling for the Design and Operation Optimization of an Energy Concept Including a Storage System

The industrial sector accounts for a huge amount of energy- and process-related CO2 emissions. One decarbonization measure is to build an energy concept that provides electricity and heat for industrial processes using a combination of different renewable energy sources, such as photovoltaic, wind turbine, and solar thermal collector systems, integrating also energy conversion power-to-heat components such as heat pumps, electric boilers, and thermal energy storage. The challenge for the industries is the economic aspect of the decarbonization, as industries require a cost-efficient solution. Minimizing cost and emissions together is a complex problem, which requires two major tasks: (I) modeling of components and (II) multi-objective coupled design and operation optimization of the energy concept. The optimal design and capacity of the components and optimal system operation depend majorly on component modeling, which is either physics-driven or data-driven. This paper shows different types of physics- and data-driven modeling of energy components for multi-objective coupled optimization in order to minimize costs and emissions of a specific industrial process as a case study. Several modeling techniques and their influence on the optimization are compared in terms of computational effort, solution accuracy, and optimal capacity of components. The results show that the combination of physics- and data-driven models has a computational time reduction of up to 37% for an energy concept without thermal energy storage and 29% for that with thermal energy storage, both with high-accuracy solutions compared to complete physics-driven models for the considered case study.

The Difficulties and Optimization of Marriage Matching: An Analysis in the Context of Chinas Modern Economy

This study delves into the use of matching theory in addressing the stable marriage problem, examining ways to optimize overall utility for both women and men across all stable matchings. The paper introduce the concept of energy, denoted by the ranking where a lower rank signifies higher priority, as a metric for individual satisfaction in a match. The primary objective is to identify a stable match that reduces the average energy expended by both genders. By emphasizing average energy, this study aims to pinpoint a stable match that optimally minimizes this metric. A variety of optimization algorithms and mathematical models are utilized to navigate the solution space and determine the best match. A comprehensive analysis of stable matchings, alongside their associated energies for men and women, unveils the inherent trade-offs and dilemmas stemming from individual preferences. The essence of stability is also explored, underscoring the imperative of balancing individual contentment with the durability of the match. The paper concludes by accentuating the necessity for continued research to bolster overall utility in stable matchings, encompassing the investigation of supplementary constraints and preferences.

Colonialism, Race, and the Concept of Energy

The following paper puts the history of race and colonialism in conversation with the history of the concept of energy. The objective is to understand what a critical decolonial perspective can teach us about the central role that energy plays in western culture, materially and epistemologically. I am interested in how this approach to political, epistemological, and ontological questions demands that we reconceptualize energy to account for the historical particularity of the concept and the phenomena of history and intersubjectivity, which are eschewed in a purely materialistic and quantitative conception of energy. We will see how energy has been complicit in the racialization of black and indigenous bodies, and how the privileged place that the concept of energy has occupied in the canon of western physics has served to obscure the theological, metaphysical, and cultural assumptions that constitute it.

Manufacturing Sectors’ Adoption of Sustainable Energy Technologies: Towards Advance Rate of Implementation

The paper aims to assess the knowledge, capacity, skills, and goals of different sectors regarding sustainable energy technology. It used semi-structured and open-ended questions to let respondents share their knowledge, information, and attitudes more freely about the extent of using sustainable energies in their companies. The respondents were business owners, managers, and specialists from various industries. All agreed that sustainable energy technologies provide benefits for their businesses, but most said that they are difficult to implement due to a lack of finance in this aspect, a lack of experience, a lack of awareness, and a lack of infrastructure. Most respondents are willing to accept their responsibilities for implementing sustainable energy in their operations. Respondents from small business companies are not aware of this concept of sustainable energy, but they use solar panel technology in their company because they know it will reduce their electricity costs. However, respondents from large enterprises have more knowledge of the concept of sustainable energy. Currently, they only use solar panels as a sustainable energy technology in some areas of their operation. Limited financial resources for this and their expertise are obstacles to expanding the use of sustainable energies in their company.

State of the practice on energy-based liquefaction evaluation and research significance

<p>Since the 1964 Niigata and Alaskan earthquakes, which incurred severe liquefaction damage, liquefaction-related design for infrastructures and buildings has been developed exclusively on the principle of force equilibrium. However, the energy concept is increasingly recognized as superior for simplified and robust liquefaction designs because of the uniqueness of energy capacity in soil failures regardless of the differences in earthquake loads. The energy-based liquefaction evaluation method (EBM) has been pursued by many investigators where dissipated energy for liquefaction is focused in place of liquefaction strength defined in the conventional stress-based method (SBM). Furthermore, the EBM enables sound liquefaction-related designs without resorting to sophisticated but highly variable/tricky numerical analyses and contributes as a scale to measure the reliability of those numerical tools. Thus, the EBM, though short of practical use in today's engineering works, should be able to serve as a simplified liquefaction evaluation tool besides the SBM. We reviewed the basic idea as well as the recent developments of the EBM together with the supporting data. We also discussed how to simplify and approximate the energy-based liquefaction behavior to implement robust evaluations in practical problems. The EBM liquefaction evaluation steps were delineated and exemplified by case studies for practicing engineers compared to the SBM.</p>

Analysis of Stress Distribution in a Curved Functionally Graded Porous Beam Using the Unified Shear Deformation Theory

Using unified shear deformation theory (USDT) and a modified power law, the current study examines bending properties of two-dimensional functionally graded curved porous beam. In order to improve accuracy, this method incorporates equilibrium equations, potential energy, and the idea of a neutral surface. The analysis uses a boundary conditions, namely simply supported . A functionally graded beam composed of metal and ceramic with both even and unequal porosity is modeled. The formulation takes into account the symmetrical material gradation, which guarantees alignment between the geometrical and physical neutral surfaces. A displacement-based formulation and energy concepts are used, which leads to a more thorough and accurate beam analysis. This approach effectively regulates the constant changing of material characteristics in FGMs, takes into consideration higher-order shear deformation effects, and does away with the requirement for shear correction factors. As a result, it improves structural behavior predictions, which makes USDT very useful for advanced material applications. The equilibrium equations for the beams are derived using the Hamilton technique and solved with the Kuhn-Tucker conditions.

Exploration of students’ scientific literacy in work and energy through STEM-based 7E learning cycle with formative assessment

21st century education requires students to have scientific literacy competencies to overcome problems in society in the globalization era. The low scientific literacy is closely related to students’ difficulties in work and energy topic. Solution is needed to improve scientific literacy by designing appropriate learning model. This study has a purpose to analyze students’ scientific literacy on work and energy through STEM-based 7E learning cycle with formative assessment. This study used embedded experimental mixed method design. The subjects were 27 of tenth grade students of Laboratory UM high school, Indonesia. Data were collected using essays of scientific literacy test with 0.657 reliability and interviews. Data were analyzed quantitatively using paired sample t-test, N-gain, and d-effect size. While the qualitative using data collection procedures, data reduction, coding, presentation, and building a conclusion. The results indicated STEM-based 7E learning cycle with formative assessment was able to increase significantly students’ scientific literacy in medium category. The results showed that majority of students at Conceptual Level which students are able to answer related with the main concept of kinetic and potential energy but but did not go beyond the concepts of scientific discipline. However, students have difficulties on indicator of creating and evaluating the experiments. For future studies, 9E Learning Cycle or aspects of ‘Art’ could be added in STEM to gain even higher students’ scientific literacy.

ПЕРЕВАГИ ТА НЕДОЛІКИ АВТОНОМНИХ СОНЯЧНИХ ЕЛЕКТРОСТАНЦІЙ

The article examines the state of research and practice of using autonomous solar power plants, the advantages and disadvantages of their use in everyday life. The main concepts of solar energy, autonomy and components of solar power plants are considered. Current normative documents regarding the researched issue are considered. Solar energy is obtained from solar radiation and can be transformed into electricity or heat. It is freely available, and thanks to advances in technology, we can now use even more of the solar energy that is constantly available to us. Solar energy has the least negative impact on the environment compared to any other energy source. It does not emit greenhouse gases and does not pollute water. Its maintenance also requires very little water, unlike, for example, nuclear power plants, which require 20 times more water. The production of solar energy does not create any noise, which is a big advantage, since many solar installations, such as residential solar panels, are located in urban areas. Solar power plants are quite innovative equipment. Solar energy is one of the most dynamically developing branches of alternative (renewable) energy. Solar energy is developing at an increasing pace and has already turned into a powerful industry in the world's largest economies. In Ukraine, the growth rate of solar energy accelerated this year. Solar energy for residential buildings is a hot topic today.

«Зелена» енергетика як основа економічного відновлення України в умовах нестабільності зовнішнього середовища

Green energy has become especially important in the modern world due to the exacerbation of climate change problems, the depletion of traditional energy sources and the need to maintain environmental stability. In the context of changes in the natural and socioeconomic environment, the transition to renewable energy is an important part of the development strategies of different countries. Ukraine, which is currently facing economic and political challenges, has a huge potential for the development of green energy, which can become a key factor in Ukraine’s economic recovery. The aim of the article is to study and analyze the conception of green energy as the basis for the economic recovery of Ukraine in the context of instability of the external environment. The article analyzes the definition of «green energy» and provides the authors’ own definition of this term. The key aspects of green energy are defined, among which the reduction of greenhouse gas emissions, energy security, sustainable development and environmental safety should be highlighted. The main factors influencing the development of green energy in Ukraine, such as economic instability, war, regulatory barriers and changes in tariff policy, are identified. The impact of green energy on the economy of Ukraine is studied. As a result, a positive impact on such aspects as the economic potential of green energy, energy independence and security has been identified. The government programs and plans to stimulate the development of green energy, in particular the Energy Strategy of Ukraine for the period up to 2050 and the National action plan on energy efficiency and renewable energy, are analyzed. The main directions of introduction of the latest technologies in green energy, in particular solar and wind energy, energy storage systems and Smart Grid technologies, have been identified. The use of these technologies will help improve the efficiency and reliability of energy systems. Therefore, green energy should be considered a key area of sustainable development, the main idea of which is to maximize the use of renewable energy sources and reduce emissions of harmful substances during the production and consumption of energy.