bluuebunny/crossref_metadata_2025_split huggingface dataset:
Study Effect of rGO Addition on Photocatalytic Activity of TiO2 in Reducing Carbon Dioxide Using Electrochemical Method
Authors: Junita T K , Faizal F , Syakir N , Aprilia A , Hastuti L P , Fitrilawati  
Published: October 2024

Abstract
Increasing the carbon dioxide (CO2) concentration every year can cause various environmental problems. One of the technologies to reduce CO2 is carbon capture. The semiconductor of TiO2 is widely used as a photocatalyst to reduce CO2. However, TiO2 has limitations in absorbing light in the visible region because it has a large band gap value. Besides, TiO2 has a fast recombination of electron-hole pairs so it can reduce photocatalytic activity. An addition of rGO is expected to cover the shortcomings of TiO2 because rGO has good conductivity and a small band gap. We synthesized rGO-TiO2 photocatalyst and measured its activity in capturing and converting CO2 using an electrochemical method. By using voltage difference as an electron driver in reacting with CO2 we observe the reaction between electrons and CO2. The measurements were carried out under irradiated and unirradiated conditions. The CV measurements show that the rGO-TiO2 electrode with 60% rGO content has reduction and oxidation peaks. Based on the electrochemical half-reaction table, the reduction peaks in unirradiated conditions indicate the conversion of CO2 to CH4 and (COOH)2, while under irradiated the reduction peak indicates the formation of HCOO− and CH2CH2. The results show that by using the rGO-TiO2 composite as an electrode not only reduces CO2 but also converts the CO2 into hydrocarbon.
Modeling of Energy Usage Intensity Based on West Java Region Conditions Using Dynamic Systems Approach
Authors: Rahardjo I A , Garniwa I , Wadjdi F , Nasruddin  , Lubis A 
Published: October 2024

Abstract
West Java is a region in Indonesia experiencing significant population growth and economic activity, leading to a substantial increase in energy demand and presenting challenges for sustainable energy resource management. Energy is fundamental to economic and social activities, and efficient, sustainable management is essential for balancing economic growth with environmental preservation. Modeling energy usage intensity is crucial for understanding the dynamics of energy consumption and its influencing factors. This study aims to develop a model that accurately represents energy consumption patterns in West Java using a dynamic systems approach. The study utilizes Causal Loop Diagrams (CLD) and Stock Flow Diagrams (SFD) to systematically map and model the intricate dynamics of the energy system, providing a comprehensive understanding of the interactions and influences among various factors. The model was validated by comparing its outputs with historical data and calculating a Mean Absolute Percentage Error (MAPE). This enhances confidence in the analyses and recommendations derived from the model, making it a valuable tool for understanding and influencing energy usage patterns in West Java. In conclusion, this study not only provides deep insights into energy consumption in West Java but also offers practical approaches for improved energy management, supporting sustainable development and environmental protection in the region.
Comparative Study of Energy Consumption Intensity: A Case Study of the Faculty of Electrical Engineering and Informatics (FEI) Versus the Faculty of Chemical Technology (FChT) in the City of Pardubice
Authors: Rahardjo I A , Garniwa I , Pidanic J , Rolecek J 
Published: October 2024

Abstract
The study’s comparative aspect between the Faculty of Electrical Engineering and Informatics (FEI) and the Faculty of Chemical Technology (FChT) buildings is pivotal for elucidating nuanced differences in energy consumption practices within academic institutions, facilitating targeted energy efficiency measures. The research methodology adopts a comparative case study approach to examine two focal research buildings. Analysis entails computing energy consumption intensity per unit area for both buildings and comparing energy consumption data to identify disparities. The need for understanding energy consumption patterns and improving energy efficiency in academic infrastructure is directly addressed through variables studied in the comparative analysis, including energy consumption comparison, annual and monthly variations, ratio, and intensity. The data indicates that the average heating intensity in the FChT building surpasses that of the FEI building by a factor of 2.3, signifying significant disparities in heating energy consumption trends between the two structures and suggesting potential areas for targeted energy efficiency interventions. Moreover, the average electrical intensity in the FChT building is over 1.7 times higher than in the FEI building. Interestingly, despite the FChT building being 2.6 times larger than the FEI, its intensity does not always correspond with the increase in building area, indicating additional factors influencing energy consumption.
Structure Analysis of Hybrid Marine Renewable Energy Platform
Authors: Arief IS , Fathalah AZM , Cahyono B , Wardana RF 
Published: October 2024

Abstract
The Pilot Project Energy Laut Hybrid for coastal communities utilises a hybrid-based tripod pontoon structure. Hydrodynamic analysis was conducted using Computational Fluid Dynamic (CFD) simulations and Detail Engineering Design (DED) testing at the Hydrodynamics Laboratory of Indonesia (LHI). This research aims to conduct a structural analysis of the tripod pontoon frame, including redesigning and comparing the strength between the existing and modified designs. An analysis using the software SACS V15.1 was employed to obtain unity check values and stress distribution. The analysis revealed that the unity check values for the existing model, with airy wave01, airy wave02, stokes wave01, and stokes wave02, were 0.508, 0.498, 0.509, and 0.5, respectively. In contrast, the unity check values for the modified model, with airy wave01, airy wave02, stokes wave01 and stokes wave02, were 0.827, 0.81, 0.827, and 0.813, respectively, indicating a 63% increase in unity check for the modified model. The largest shear stress was observed on member A5-1-A5-2 in both models, which still complies with the API RP 2A-WSD standard. Additionally, the modified model was 21% lighter than the existing model, with Z shear stress increasing by 63% for both airy and stokes wave types.
Unveiling the Future of Safety: Cutting-Edge Simulation Testing of e-Kart Bumpers
Authors: Taryudi  , Anggrainy Rani , Yoga Nugroho Gama , Wiyono Apri , Putri Devi Maharani , Wahyudi Zaid Taqi , Septiyan Yusuf Azis 
Published: October 2024

Abstract
This research project proves the importance of simulation technology in developing safe and efficient components for electric Go-Kart and how this approach could impact the future of automotive design and engineering. The development of electric Go-Kart present unique challenges in ensuring safety and performance, given the increasing demand for eco-friendly mobility solutions in motorsports. As the adoption of the electric vehicles grow, the importance of designing robust and reliable safety components, such as bumpers, become critical to protect drivers and enhance vehicle durability. While previous studies have explored Go-Kart safety and performance, they often relied on traditional testing methods that are time-consuming and limited in their ability to simulate complex crash scenarios. Moreover, many studies have not fully addressed the specific challenges associated with the unique dynamics of electric Go-Kart. This research fills these gaps by focusing on testing electric Go-Kart bumpers through advanced computer simulations used to thoroughly examine various crash and impact scenarios to assess the reliability and durability of the front, side and rear bumpers to improve safety and performance. The results of the stress analysis carried out on the electric Go-Kart body showed that the electric go-kart body experienced displacement and safety factors, with the stress experienced being at a point below the yield strength or yield strength so that the body construction was declared safe against the static loading received, so that the test results this provides detailed insight into material strength, structural design, and possible improvements that can be made to reduce the risk of rider injury.
Needs Analysis for a STEM Discovery Learning-Based E-Module in Static Electricity
Authors: Udyaningsih P S , Suharno  , Budiawanti S 
Published: October 2024

Abstract
This study aims to determine the need for learning devices in the form of electronic teaching module based on STEM Discovery learning to measure critical thinking skills and collaboration skills of students so that it can be known and there is a follow-up from researchers to teachers in implementing learning. The need analysis studied was a teaching module need analysis, static electricity material analysis, critical thinking ability analysis, and collaboration skills. The subjects of this research are high school physics teachers who teach using the Merdeka curriculum and teach in grade 12. The participants of this research are 30 teachers from different schools in several districts/cities in Central Java, Yogyakarta, and Bangka Belitung. The research method used is the quantitative descriptive research method. The data collection techniques used in this study consisted of observation, questionnaires, documentation, and literature studies. The data collected were analyzed with appropriate instruments, with descriptive statistical analysis techniques. Based on the data analysis, the following results were obtained: 1) As many as 70% of physics teachers still face difficulties in developing teaching modules, but 85.83% of them expressed interest in creating modules that are aligned with the criteria for electronic teaching modules based on STEM Discovery learning in the Merdeka curriculum; 2) Static electricity is important but difficult for students to understand; 3) Teachers struggle with teaching aspects related to both students’ critical thinking and collaboration skills, with 70% of physics teachers reporting difficulties in fostering critical thinking and 52.78% facing challenges in enhancing collaboration skills; 4) Teachers need teaching module that supports aspects of critical thinking skills and collaboration skills of students.
Analysis of Student Problem-Solving Skills on Static Fluid Topics
Authors: Rachmawati O Q , Parno  , Latifah E , Wisodo H , Ghorbiy B , Bunyamin M A H 
Published: October 2024

Abstract
Finding high school students’ Problem-Solving Skills (PSS) on static fluid is the aim of this study. A sample of 125 students from a high school in East Java, Indonesia, was employed in this quantitative study employing a survey methodology. The Problem-Solving Skills Test (Cronbarch’s Alpha reliability of 0.66), which consists of six essay questions with a scoring range of 1 to 5, was used to collect the study data. The research data was analyzed using descriptive statistics. The average PSS of the students according to the research results was 20.54 with the conversion of the PSS Test score to a scale of 0-100, placing them in the beginner category. According to the PSS indicators, the rank of students from highest to lowest level is Useful Description, Specific Application of Physics, Mathematical Procedures, Physics Approach, and Logical Progression. Students find that Archimedes’ Law, Pascal’s Law, and Hydrostatic Pressure are the most difficult static fluid subtopic to go through. It is highly recommended that learning methods that can support students’ problem-solving skills, such as project-based learning in conjunction with Science, Technology, Engineering, Art, and Mathematics (STEAM), provide them with the skills to use logic in their thinking when solving problems.
Development of Static Fluid Demonstrators: Hydraulic Bridge to Improve Laboratory Skills
Authors: Susanti Dwi , Maulana Slamet , Aroyandini Elvara Norma 
Published: October 2024

Abstract
This research aims to develop a hydraulic bridge as a static fluid material prop. The development of these teaching aids focuses on improving students’ laboratory skills. This research is based on the need for students to have practical experience in the laboratory. This developed hydraulic bridge prop is expected to strengthen mastery of concepts in static fluid materials and improve students’ laboratory skills. The research method used is research and development with the resulting product in the form of hydraulic bridge props. Quantitative analysis techniques are used to measure the feasibility and effectiveness of teaching aids that have been developed, as well as to improve students’ laboratory skills. The results showed that the hydraulic bridge trainers that have been developed have excellent feasibility and effectiveness. The results showed a positive relationship between using hydraulic bridge props and improving student laboratory capabilities. The interactive nature of the developed teaching aids enhances technical abilities and fosters students’ critical thinking, problem-solving, and teamwork skills. This study concluded that the teaching aids in the form of hydraulic bridges that had been developed proved feasible and effective and were able to improve students’ laboratory skills. The implications of this research extend to curriculum improvement and advocating for the integration of practical teaching aids, such as hydraulic bridges, to optimize student learning outcomes. Future directions include improving the implementation of hydraulic bridges across engineering disciplines and conducting longitudinal studies to assess its long-term impact on student’s academic and professional development.
E-Module Flipbook based on STEM Approach to Renewable Energy Topics as Physics Learning Media
Authors: Syukri M , Herliana F , Aksa Y , Muliyati D , Ngadimin N , Artika W , Iswadi I 
Published: October 2024

Abstract
This research is a development that aims to produce a product and determine the validity of flipbook e-modules based on the STEM (Science, Technology, Engineering, and Mathematics) approach to learning the physics of renewable energy materials. The research procedure consists of stages: analysis, design, and development. This research involved two experts, namely, physics material and media, and one learning practitioner. The data collection instrument uses a questionnaire evaluation sheet. The evaluation results obtained a score of 0.87 in the very high validity category from physics subject experts and 0.85 in the very high validity category from media experts. From the results of this evaluation, the flipbook e-module based on the STEM approach to renewable energy topics is very highly valid for use as a physics learning medium.
The TPACK Physics Learning Video: Forming 21st Century Skills in Physics Learning
Authors: Bakri F , Permana A H , Ardiati R P 
Published: October 2024

Abstract
The 21st century learning process in schools emphasizes soft skills. To support the learning process in schools, learning videos are needed that present physics content in a learning process. This article publishes the results of research and development of physics learning videos. This physics learning video presents physics learning in stages that train creativity and critical thinking skills. The physics content is a Static Fluid presented with the TPACK framework. This physics learning video uses Lee & Owens research and development stages. Product feasibility is assessed using a questionnaire by experts. The components assessed are the suitability of physics content, the suitability of the learning process, the suitability of physics learning media on static fluid concepts. Sequentially, it received an assessment of 95.0% for physics content, 98.0% for the learning process, 100.0% for video media. The implementation of TPACK for the learning process in learning video products has made it easier for students to practice their critical thinking skills and increase their creativity.
Do attitudes toward air pollution influence climate change perception? Evidence from online customers in China
Authors: Sun Li , Yang Jianxun , Liu Miaomiao , Fang Wen , Ma Zongwei , Bi Jun 
Published: October 2024

Abstract
The perception of climate change as an abstract and distant concept hinders climate action. Previous studies suggest that individuals may conflate climate change and local air pollution due to misconceptions, as these environmental issues share similar emission sources and mitigation strategies. However, it remains uncertain whether leveraging the public’s high perception of air pollution can lead to increased climate change awareness and supportive behaviors. In this study, we surveyed 1236 Chinese online customers to explore the influence of air pollution perception on climate change perception and willingness to pay (WTP) for supporting climate actions. Structural equation modeling results revealed that higher air pollution perception, which is connected to an individual’s living environment and health status, is significantly associated with higher climate change perception. Despite this link, higher climate change perception does not necessarily translate to higher WTP for climate actions. However, air pollution perception can indirectly increase WTP for climate actions by fostering avoidance behavior intentions. For practical implications, our findings suggest that an emphasis on the co-benefits of climate change mitigation efforts for improving air quality may help lead to greater policy support and understanding. Additionally, promoting individual behavioral changes requires connecting these issues to personal experiences and highlighting tangible benefits such as improved health and well-being.
Linking regional economic impacts of temperature-related disasters to underlying climatic hazards
Authors: Mithal Vidur , Sillmann Jana , Zscheischler Jakob 
Published: October 2024

Abstract
Temperature-induced disasters lead to major human and economic damage, but the relationship between their climatic drivers and impacts is difficult to quantify. In part, this is due to a lack of data with suitable resolution, scale and coverage on impacts and disaster occurrence. Here, we address this gap using new datasets on subnational sector-disaggregated economic productivity and geo-coded disaster locations to quantify the role of climatic hazards on economic impacts of temperature-induced disasters at a subnational scale. Using a regression-based approach, we find that the regional economic impacts of heat-related disasters are most strongly linked to the daily maximum temperature (TXx) index. This effect is largest in the agricultural sector (6.37% regional growth rate reduction per standard deviation increase in TXx anomaly), being almost twice as strong as in the manufacturing sector (3.98%), service sector (3.64%), and whole economy (3.64%). We also highlight the role of compound climatic hazards in worsening impacts, showing that in the agriculture sector, compound hot-and-dry conditions amplify the impacts of heat-related disasters on growth rates by a factor of two. In contrast, in the service and manufacturing sectors, stronger impacts are found to be associated with compound hot and wet conditions. These findings present a first step in understanding the relationship between temperature-related hazards and regional economic impacts using a multi-event database, and highlight the need for further research to better understand the complex mechanisms including compound effects underlying these impacts across sectors.
Solution of the υ-representability problem on a one-dimensional torus
Authors: Sutter Sarina M , Penz Markus , Ruggenthaler Michael , Leeuwen Robert van , Giesbertz Klaas J H 
Published: October 2024

Abstract
We provide a solution to the v-representability problem for a non-relativistic quantum many-particle system on a one-dimensional torus domain in terms of Sobolev spaces and their duals. Any one-particle density that is square-integrable, has a square-integrable weak derivative, and is gapped away from zero can be realized from the solution of a many-particle Schrödinger equation, with or without interactions, by choosing a corresponding external potential. This potential can contain a distributional contribution but still gives rise to a self-adjoint Hamiltonian. Importantly, this allows for a well-defined Kohn–Sham procedure but, on the other hand, invalidates the usual proof of the Hohenberg–Kohn theorem.
Pseudo-Hermitian Chebyshev differential matrix and non-Hermitian Liouville quantum mechanics
Authors: Lan Chen , Li Wei , Geng Huifang 
Published: October 2024

Abstract
The spectral collocation method (SCM) exhibits a clear superiority in solving ordinary and partial differential equations compared to conventional techniques, such as finite difference and finite element methods. This makes SCM a powerful tool for addressing the Schrödinger-like equations with boundary conditions in physics. However, the Chebyshev differential matrix (CDM), commonly used in SCM to replace the differential operator, is not Hermitian but pseudo-Hermitian. This non-Hermiticity subtly affects the pseudospectra and leads to a loss of completeness in the eigenstates. Consequently, several issues arise with these eigenstates. In this paper, we revisit the non-Hermitian Liouville quantum mechanics by emphasizing the pseudo-Hermiticity of the CDM and explore its expanded models. Furthermore, we demonstrate that the spectral instability can be influenced by the compactification parameter.
Fermi’s golden rule in tunneling models with quantum waveguides perturbed by Kato class measures
Authors: Kondej Sylwia , Ślipko Kacper 
Published: October 2024

Abstract
In this paper we consider two dimensional quantum system with an infinite waveguide of the width d and a transversally invariant profile. Furthermore, we assume that at a distant ρ there is a perturbation defined by the Kato measure. We show that, under certain conditions, the resolvent of the Hamiltonian has the second sheet pole which reproduces the resonance at

z
(
ρ
)

with the asymptotics

z
(
ρ
)
=

E

β
;
n

+

O

(

exp
⁡
(
−

2

|

E

β
;
n

|

ρ
)

ρ

)

for ρ large and with the resonant energy

E

β
;
n

. Moreover, we show that the imaginary component of

z
(
ρ
)

satisfies Fermi’s golden rule which we explicitly derive.
Micro-thin hydrogel coating integrated in 3D printing for spatiotemporal delivery of bioactive small molecules
Authors: Sarker Md , Park Soomin , Kumar Vivek , Lee Chang H 
Published: October 2024

Abstract
Three-dimensional (3D) printing incorporated with controlled delivery is an effective tool for complex tissue regeneration. Here, we explored a new strategy for spatiotemporal delivery of bioactive cues by establishing a precise-controlled micro-thin coating of hydrogel carriers on 3D-printed scaffolds. We optimized the printing parameters for three hydrogel carriers, fibrin cross-linked with genipin, methacrylate hyaluronic acid, and multidomain peptides, resulting in homogenous micro-coating on desired locations in 3D printed polycaprolactone microfibers at each layer. Using the optimized multi-head printing technique, we successfully established spatial-controlled micro-thin coating of hydrogel layers containing profibrogenic small molecules (SMs), Oxotremorine M and PPBP maleate, and a chondrogenic cue, Kartogenin. The delivered SMs showed sustained releases up to 28 d and guided regional differentiation of mesenchymal stem cells, thus leading to fibrous and cartilaginous tissue matrix formation at designated scaffold regions in vitro and in vivo. Our micro-coating of hydrogel carriers may serve as an efficient approach to achieve spatiotemporal delivery of various bioactive cues through 3D printed scaffolds for engineering complex tissues.