bluuebunny/crossref_metadata_2025 huggingface dataset:
Resources for reasoning of chemistry concepts: multimodal molecular geometry
Authors: Kiernan Nicola A. , Manches Andrew , Seery Michael K.
Published: January 2024

Central to conceptual understanding of STEM disciplines is visuospatial processing. Despite its acknowledged role in assuring learners’ success, less is known about the underlying reasoning students must employ when solving 3-D problems and the ways in which gaining an understanding of this can inform formative assessment and learning in STEM education. Chemists must utilise their spatial understanding when visualising 3-D structures and processes from 2-D representations and so this exploratory practitioner-researcher study sought to identify the ways in which secondary school chemistry students reason when explaining their predictions about molecular geometry, and how the use of certain modalities was linked to assessed accuracy. Coding of students’ verbal and written responses to the research task revealed that students employed multiple reasoning strategies and conceptual resources to facilitate use of analytical heuristics and imagistic reasoning. Analysis of students’ verbal responses and spontaneous gestures provided insight into the extent of imagistic vs. analytical reasoning and the finer-grained conditions which promoted their use. Importantly, it was observed that despite being instructed on the use of VSEPR theory to find analytical solutions, some students exhibited preference for alternative reasoning strategies drawing upon imagistic reasoning; showing more nuanced and varying degrees of accuracy through their verbal responses and representations gestured in 3D space. This work has pedagogical implications as use of specific reasoning strategies and the identification of key conceptual resources is not readily promoted as classroom practice for learning or assessment. This study therefore raises questions and contributes to the evidence base for attending to learners’ visuospatial thinking, as revealed through the multiple modalities they may use to assist and communicate their understanding, and highlights the significance of this to formative assessment in Chemistry and STEM Education.
A meta-analysis of effectiveness of chemical bonding-based intervention studies in improving academic performance
Authors: Çalik Muammer , Ültay Neslihan , Bağ Hasan , Ayas Alipaşa
Published: January 2024

The purpose of this study is to meta-analytically evaluate research that used chemical bonding-based interventions to improve academic performance. Through meta-analysis, the present study used several keyword patterns (e.g., chemical bonding, experimental, chemistry education, science education) via relevant databases (e.g., ERIC, Springer Link, Taylor & Francis, Wiley Online Library Full Collection, and Scopus) to find chemical bonding-intervention studies. Thus, it included 50 chemical bonding-based intervention papers (15 dissertations, 32 articles, and 3 proceedings). The current meta-analysis found that the overall effect-size of chemical bonding-based intervention studies was 1.007, which shows a large effect. Findings regarding moderator analysis displayed non-significant differences between educational levels and a statistically significant difference between the intervention types. This meta-analysis reveals that the chemical bonding-based intervention studies are effective at improving the participants’ academic performance in terms of chemical bonding. Further, it denotes that when the abstract nature of chemical bonding is overlapped with the features of the intervention type, the interventions (e.g., cooperative learning and enriched learning environment with different methods) result in better academic performance. Since this study, like all meta-analyses, points out consistent and inconsistent findings among published research, further meta-analysis studies should be undertaken to resolve any contradictory findings.
Small‐gain based stabilizing control for hybrid systems: Application to bipedal walking robot
Authors: Khademian Fatemeh , Rahmani Mehdi
Published: January 2024

This study presents a systematic methodology for developing a stabilizing controller for a general hybrid systems model. The approach is based on utilizing the small‐gain theorem as a means of constructing the Lyapunov function and analyzing the input–output stability of the subsystems in the feedback loop. By considering the control system in a closed‐loop configuration with the hybrid system, the small‐gain theorem can be applied. In this scheme, a dynamic control system is proposed that satisfies the closed‐loop stability conditions. This method applies to various hybrid systems' applications due to its generality. To demonstrate the effectiveness and performance of the proposed control approach, two simulation examples, including a linear hybrid system and a bipedal walking robot, are examined.
Dynamic load altering attack detection based on adaptive fading Kalman filter in smart grid
Authors: Li Jian , Sun Chaowei , Yang Shuxian , Su Qingyu
Published: January 2024

This paper mainly studies a detection method of dynamic load altering attacks (D‐LAAs) in smart grids. First, communication factors are considered, and a smart grid discrete system model under D‐LAA attack is established. Second, for closed‐loop D‐LAAs, an adaptive fading Kalman filter (AFKF) is designed to estimate the states of smart grids with Gaussian noise in real time, and a Euclidean distance ratio detection algorithm based on AFKF is proposed to detect D‐LAAs. Moreover, the proposed detection algorithm can identify D‐LAAs even in the presence of noise in the measurement data, significantly enhancing the speed of attack detection. Finally, take a smart grid with three generators and six buses as an example. Its feasibility and effectiveness of the Euclidean distance ratio detection algorithm are verified by simulations. The simulations are carried out through the real‐time hardware‐in‐the‐loop simulation platform, which is mainly composed of StarSim and multi‐tasking devices.
ARES
Authors: Jaziri Adam Yassin , Pluriel William , Bocchieri Andrea , Panek Emilie , Teinturier Lucas , Ivanova Anastasiia , Rektsini Natalia E. , Drossart Pierre , Beaulieu Jean-Philippe , Falco Aurélien , Leconte Jérémy , Mugnai Lorenzo V. , Venot Olivia
Published: January 2024

Observed exoplanet transit spectra are usually retrieved using 1D models to determine atmospheric composition. However, planetary atmospheres are 3D. With the new state-of-the-artJames WebbSpace Telescope (JWST) and future space telescopes such as Ariel (Atmospheric Remote-sensing Infrared Exoplanet Large-survey), we will be able to obtain increasingly accurate transit spectra. The 3D effects on the spectra will be visible, and we can expect biases in the 1D extractions. In order to elucidate these biases, we have built theoretical observations of transit spectra, from 3D atmospheric modeling through transit modeling to instrument modeling. For this purpose, we used a global climate model (GCM) to simulate the atmosphere, a 3D radiative transfer model to calculate theoretical transmission spectra, and adapted instrument software from JWST and Ariel to reproduce telescope noise. Next, we used a 1D radiative transfer inversion model to retrieve the known input atmosphere and disentangle any biases that might be observed. The study was done from warm planets to ultra-hot planets to assess biases as a function of average planet temperature. Three-dimensional effects are observed to be strongly nonlinear from the coldest to the hottest planets. These effects also depend on the planet’s metallicity and gravity. Considering equilibrium chemistry, 3D effects are observed through very strong variations in certain features of the molecule or very small variations over the whole spectrum. We conclude that we cannot rely on the uncertainty of retrievals at all pressures, and that we must be cautious about the results of retrievals at the top of the atmosphere. However the results are still fairly close to the truth at mid-altitudes (those probed). We also need to be careful with the chemical models used for planetary atmosphere. If the chemistry of one molecule is not correctly described, this will bias all the others, and the retrieved temperature as well. Finally, although fitting a wider wavelength range and higher resolution has been shown to increase retrieval accuracy, we show that this could depend on the wavelength range chosen, due to the accuracy on modeling the different features. In any case, 1D retrievals are still correct for the detection of molecules, even in the event of an erroneous abundance retrieval.
The elusive atmosphere of WASP–12 b
Authors: Czesla S. , Lampón M. , Cont D. , Lesjak F. , Orell-Miquel J. , Sanz-Forcada J. , Nagel E. , Nortmann L. , Molaverdikhani K. , López-Puertas M. , Yan F. , Quirrenbach A. , Caballero J. A. , Pallé E. , Aceituno J. , Amado P. J. , Henning Th. , Khalafinejad S. , Montes D. , Reiners A. , Ribas I. , Schweitzer A.
Published: January 2024

To date, the hot Jupiter WASP–12 b has been the only planet with confirmed orbital decay. The late F-type host star has been hypothesized to be surrounded by a large structure of circumstellar material evaporated from the planet. We obtained two high-resolution spectral transit time series with CARMENES and extensively searched for absorption signals by the atomic species Na, H, Ca, and He using transmission spectroscopy, thereby covering the He I λ10833 Å triplet with high resolution for the first time. We apply SYSREM for atomic line transmission spectroscopy, introduce the technique of signal protection to improve the results for individual absorption lines, and compare the outcomes to those of established methods. No transmission signals were detected and the most stringent upper limits as of yet were derived for the individual indicators. Nonetheless, we found variation in the stellar Hα and He I λ10833 Å lines, the origin of which remains uncertain but is unlikely to be activity. To constrain the enigmatic activity state of WASP–12, we analyzed XMM-Newton X-ray data and found the star to be moderately active at most. We deduced an upper limit for the X-ray luminosity and the irradiating X-ray and extreme ultraviolet (XUV) flux of WASP–12 b. Based on the XUV flux upper limit and the lack of the He I λ10833 Å signal, our hydrodynamic models slightly favor a moderately irradiated planet with a thermospheric temperature of ≲12 000 K, and a conservative upper limit of ≲4 × 1012 g s−1 on the mass-loss rate. Our study does not provide evidence for an extended planetary atmosphere or absorption by circumstellar material close to the planetary orbit.
Water transport through mesoporous amorphous-carbon dust
Authors: Basalgète R. , Rouillé G. , Jäger C.
Published: January 2024

The diffusion of water molecules through mesoporous dust of amorphous carbon (a-C) is a key process in the evolution of prestellar, protostellar, and protoplanetary dust, as well as in that of comets. It also plays a role in the formation of planets. Given the absence of data on this process, we experimentally studied the isothermal diffusion of water molecules desorbing from water ice buried at the bottom of a mesoporous layer of aggregated a-C nanoparticles, a material analogous to protostellar and cometary dust. We used infrared spectroscopy to monitor diffusion in low temperature (160 to 170 K) and pressure (6 × 10−5 to 8 × 10−4 Pa) conditions. Fick’s first law of diffusion allowed us to derive diffusivity values on the order of 10−2 cm2 s−1, which we linked to Knudsen diffusion. Water vapor molecular fluxes ranged from 5 × 1012 to 3 × 1014 cm−2 s−1 for thicknesses of the ice-free porous layer ranging from 60 to 1900 nm. Assimilating the layers of nanoparticles to assemblies of spheres, we attributed to this cosmic dust analog of porosity 0.80−0.90 a geometry correction factor, similar to the tortuosity factor of tubular pore systems, between 0.94 and 2.85. Applying the method to ices and refractory particles of other compositions will provides us with other useful data.
RETRACTED: Technological development of timber enterprises: equipment replacement mechanism
Authors: Medvedev Sergey , Zyryanov Mikhail , Gerasimova Marina , Shvetsova Irina
Published: January 2024

See the retraction notice BIO Web of Conferences 84, 00001 (2024), https://doi.org/10.1051/bioconf/20248400001
RETRACTED: Cost-benefit analysis of implementing automated systems in agricultural micropropagation
Authors: Gazieva Laila
Published: January 2024

See the retraction notice BIO Web of Conferences 84, 00001 (2024), https://doi.org/10.1051/bioconf/20248400001
RETRACTED: Efficiency and genotypic quality potential of winter wheat grain in the central chernozem region
Authors: Dolgopolova Natalia , Eremenko Olga , Feoktistov Gennady , Vishnevetsky Denis
Published: January 2024

See the retraction notice BIO Web of Conferences 84, 00001 (2024), https://doi.org/10.1051/bioconf/20248400001
RETRACTED: The effect of solar radiation on solar panels located in the open and placed in the shade of a building
Authors: Kuchkarov Akmal , Muminov Shermuhammad , Frid Semen , Madaliev Murodil
Published: January 2024

See the retraction notice BIO Web of Conferences 84, 00001 (2024), https://doi.org/10.1051/bioconf/20248400001
RETRACTED: Formation of future specialists in the field of aquaculture and fisheries by means of vocational education
Authors: Belovitskaya Svetlana , Shatokhina Irina
Published: January 2024

See the retraction notice BIO Web of Conferences 84, 00001 (2024), https://doi.org/10.1051/bioconf/20248400001
RETRACTED: New supplementary feeds for sterlet in industrial cultivation
Authors: Ponomareva Elena , Geraskin Peter , Kovaleva Angelika , Sorokina Marina , Aleksandrova Uliana , Rudoy Dmitry
Published: January 2024

See the retraction notice BIO Web of Conferences 84, 00001 (2024), https://doi.org/10.1051/bioconf/20248400001
RETRACTED: The effectiveness of the use of the drug “Furinaid” in complex therapy in the treatment of idiopathic cystitis in small pets
Authors: Alekseeva Tatyana , Krotova Olga , Savenkov Konstantin , Ubushaeva Dayana , Nimeeva Anna , Chuev Hongr
Published: January 2024

See the retraction notice BIO Web of Conferences 84, 00001 (2024), https://doi.org/10.1051/bioconf/20248400001
RETRACTED: Criminal threats to environmental safety in the agro-industrial complex
Authors: Vitvitskaya Svetlana , Keydunova Elena
Published: January 2024

See the retraction notice BIO Web of Conferences 84, 00001 (2024), https://doi.org/10.1051/bioconf/20248400001
RETRACTED: Impact of digital technologies on green economic growth
Authors: Valeva Katina , Nikolova-Alexieva Valentina , Terziyska Margarita
Published: January 2024

See the retraction notice BIO Web of Conferences 84, 00001 (2024), https://doi.org/10.1051/bioconf/20248400001
RETRACTED: Study of empirical mechanisms for organizing interaction in a multi-level innovation environment with information asymmetry
Authors: Makhosheva Salima , Gurtuev Alim , Ivanov Zaur
Published: January 2024

See the retraction notice BIO Web of Conferences 84, 00001 (2024), https://doi.org/10.1051/bioconf/20248400001
RETRACTED: Didactic possibilities of using computer graphics programs in the educational process
Authors: Mamurova Dilfuza , Khusnidinova Nozima
Published: January 2024

See the retraction notice BIO Web of Conferences 84, 00001 (2024), https://doi.org/10.1051/bioconf/20248400001
RETRACTED: Determining the optimal placement scheme and height of elements that accelerate heat exchange processes in solar air heater collectors through mathematical modeling
Authors: Kuchkarov Akmal , Uzbekov Mirsoli , Boynazarov Bekzod , Abdukarimov Bekzod , Mamatov Olmosbek , Muminov Shermuhammad
Published: January 2024

See the retraction notice BIO Web of Conferences 84, 00001 (2024), https://doi.org/10.1051/bioconf/20248400001
RETRACTED: Active computing experiment in modeling the dynamics of mechatronic systems
Authors: Shornikov Yu.V. , Timofeev K.A , Petukhov V.N.
Published: January 2024

See the retraction notice BIO Web of Conferences 84, 00001 (2024), https://doi.org/10.1051/bioconf/20248400001
RETRACTED: Several different ways to increase the accuracy of the numerical solution of the first order wave equation
Authors: Madaliev Murodil , Orzimatov Jahongir , Abdulkhaev Zokhidjon , Esonov Olimjon , Mirzaraximov Mirzohid
Published: January 2024

See the retraction notice BIO Web of Conferences 84, 00001 (2024), https://doi.org/10.1051/bioconf/20248400001
RETRACTED: Development of methods and algorithms for calculating ventilation and perfusion in the EIT
Authors: Aleksanyan Grayr , Gorbatenko Nikolay , Kucher Artyom , Katsupeev Andrey
Published: January 2024

See the retraction notice BIO Web of Conferences 84, 00001 (2024), https://doi.org/10.1051/bioconf/20248400001
RETRACTED: Development of the method for determining electrode location and placement on the patient’s body in the EIT
Authors: Aleksanyan Grayr , Kucher Artyom , Katsupeev Andrey
Published: January 2024

See the retraction notice BIO Web of Conferences 84, 00001 (2024), https://doi.org/10.1051/bioconf/20248400001
RETRACTED: Bacteriological investigation of pyelonephritis in AL-Najaf Governorate, Iraq: a cross-Sectional study
Authors: Al-janabi Dhafer Rahman Abed , Aljanaby Ahmed Abduljabbar Jaloob
Published: January 2024

See the retraction notice BIO Web of Conferences 84, 00001 (2024), https://doi.org/10.1051/bioconf/20248400001
RETRACTED: Immune response in men patients infected with toxoplasmosis
Authors: Ali faieq Zahraa , Al-Hadraawy Saleem Khteer
Published: January 2024

See the retraction notice BIO Web of Conferences 84, 00001 (2024), https://doi.org/10.1051/bioconf/20248400001
RETRACTED: Endocrine pathologies and pregnancy: features of medical control of patients
Authors: Churochkin A.A. , Baybolatova M.Z. , Bagdasarova E.S. , Kotykhova A.I. , Alekseeva E.A. , Abilgasanli A.Yu.
Published: January 2024

See the retraction notice BIO Web of Conferences 84, 00001 (2024), https://doi.org/10.1051/bioconf/20248400001
RETRACTED: Innovative practice in the training of future doctors
Authors: Bondarenko Ekaterina , Khoronko Lyubov
Published: January 2024

See the retraction notice BIO Web of Conferences 84, 00001 (2024), https://doi.org/10.1051/bioconf/20248400001
RETRACTED: Intellectual analysis of foreign students’
Authors: Yadrovskaya Marina , Porksheyan Markos
Published: January 2024

See the retraction notice BIO Web of Conferences 84, 00001 (2024), https://doi.org/10.1051/bioconf/20248400001
RETRACTED: Development of communicative competence of students studying ecology
Authors: Kapustina Darya , Goyushova Leyla
Published: January 2024

See the retraction notice BIO Web of Conferences 84, 00001 (2024), https://doi.org/10.1051/bioconf/20248400001
RETRACTED: Interpersonal relations in the teaching staff and pro-environmental behavior of teachers of general educational organizations
Authors: Boiko Olga , Mitichkina Olga , Petrenko Elena , Chubova Irina
Published: January 2024

See the retraction notice BIO Web of Conferences 84, 00001 (2024), https://doi.org/10.1051/bioconf/20248400001
RETRACTED: Mathematical tools for updating the value profile of environmental university programs’ students
Authors: Ivashova Valentina , Zolotarev Sergey , Ardashev Roman , Kovaleva Svetlana , Aboneeva Catherine , Kalashova Anna
Published: January 2024

See the retraction notice BIO Web of Conferences 84, 00001 (2024), https://doi.org/10.1051/bioconf/20248400001
RETRACTED: Model of the management system of a higher educational institution
Authors: Kudryavtseva Irina , Pocebneva Irina , Deniskina Antonina , Narezhnaya Tamara
Published: January 2024

See the retraction notice BIO Web of Conferences 84, 00001 (2024), https://doi.org/10.1051/bioconf/20248400001
RETRACTED: Enhancing Professional Competence through ESP
Authors: Xatamova Nodiraxon , Ismatullayeva Nigora
Published: January 2024

See the retraction notice BIO Web of Conferences 84, 00001 (2024), https://doi.org/10.1051/bioconf/20248400001
RETRACTED: Establishing markers of avoidant behavior in the context of developing sustainable behavior
Authors: Godunov Mikhail , Portnov Evgeny
Published: January 2024

See the retraction notice BIO Web of Conferences 84, 00001 (2024), https://doi.org/10.1051/bioconf/20248400001
RETRACTED: Characteristics of value orientations and attitudes to communication in codependent women of different ages as predictors of the development of sustainable behavior
Authors: Kolenova Anastasia , Kukulyar Anna
Published: January 2024

See the retraction notice BIO Web of Conferences 84, 00001 (2024), https://doi.org/10.1051/bioconf/20248400001
RETRACTED: Subjective factors of travel activity for the purpose of cultural support of biological diversity for individuals with different success levels
Authors: Shcherbakova Tatyana , Zvezdina Galina , Kalinina Elena
Published: January 2024

See the retraction notice BIO Web of Conferences 84, 00001 (2024), https://doi.org/10.1051/bioconf/20248400001
RETRACTED: The latest achievements of fundamental physics as a tool of “culture shock” in education
Authors: Blagin Anatoliy , Minasyan Larisa , Leshcheva Olga , Lemeshko Galina , Popova Inna , Zdanova Tatyana
Published: January 2024

See the retraction notice BIO Web of Conferences 84, 00001 (2024), https://doi.org/10.1051/bioconf/20248400001
RETRACTED: Fundamentals of forecasting explosive gas accumulation formation in working areas of coal mines
Authors: Pekarchuk Danil , Skripnik Igor , Panov Sergey , Kaverzneva Tatyana , Gorbunova Olga
Published: January 2024

See the retraction notice BIO Web of Conferences 84, 00001 (2024), https://doi.org/10.1051/bioconf/20248400001
RETRACTED: Reaction of aromatic carboxylic acids with phenylacetylene with the participation of a zinc catalyst
Authors: Parmanov A.B. , Nurmanov S.E. , Ruzimuradov O.N. , Torambetov B.S. , Ziyadullaev M.E. , Abdullaev J.U. , Tirkasheva S.I. , Tursunov Sh.Sh.
Published: January 2024

See the retraction notice BIO Web of Conferences 84, 00001 (2024), https://doi.org/10.1051/bioconf/20248400001
RETRACTED: Modernisation of the Ponsse Ergo SMRM articulated joint at Mobile Service LLC
Authors: Svoykin F.V. , Svoykin V.F. , Maksimov P.P. , Poberezhskiy S.Y.
Published: January 2024

See the retraction notice BIO Web of Conferences 84, 00001 (2024), https://doi.org/10.1051/bioconf/20248400001
RETRACTED: Tax resident status: approaches to determination and consequences of its loss by an individual
Authors: Berman Alisa , Ershov Nikita
Published: January 2024

See the retraction notice BIO Web of Conferences 84, 00001 (2024), https://doi.org/10.1051/bioconf/20248400001
RETRACTED: Mechanical and biocompatible properties of the poly(lactide-co-glycolide) matrices produced by antisolvent 3D printing
Authors: Mokrousova Victoria , Nedorubova Irina , Vasilyev Andrey , Kuznetsova Valeriya , Mironov Anton , Khvorostina Maria , Bukharova Tatyana , Popov Vladimir , Goldshtein Dmitry , Losev Fedor , Kulakov Anatoly
Published: January 2024

See the retraction notice BIO Web of Conferences 84, 00001 (2024), https://doi.org/10.1051/bioconf/20248400001
RETRACTED: Assessment of the sustainable development of the flight route
Authors: Lebedev Georgy , Severov Vyacheslav , Mikhailin Denis , Roumakina Alena , Kostyshak Mikhail
Published: January 2024

See the retraction notice BIO Web of Conferences 84, 00001 (2024), https://doi.org/10.1051/bioconf/20248400001
Comparative Analysis of Low Voltage Ride Through Techniques of DFIG Connected to Grid using AI Techniques
Authors: Gangikunta Manohar , Venkateshwarlu Sonnati , Jaya Laxmi Askani
Published: January 2024

The requirement for clean and eco-friendly energy initiated the production of renewable energy. Wind energy promises attractive features such as bulk power production and reduced maintenance cost. Advancement of technologies in the field of wind turbines and generators made the gates open for attractive investments. Adjustable-speed wind turbines tied to Doubly Fed Induction Generators (DFIG) became the most excellent choice of power utilities due to their low-cost power converters and four-quadrant control of useful and wattless powers. The ability to extract a high amount of power for a specified wind speed is a major advantage of DFIG which attracted Power system Operators (PSOs). Low voltage ride-through and wattless Spower support to the grid are estimated and compared using conventional PI controllers, Artificial Neural Network (ANN), and Random Forest Optimization (RFO) algorithm.
Utilizing Artificial Neural Network For the Regulation Of Electric Springs In Renewable Systems
Authors: Rao P. Nageswara , Prakash S. Jaya , Siva Prasad Syamala , Kumar M. Vnod
Published: January 2024

Now a days the research work is going on to improve the performance of electric springs (ESs) by integrating a current source inverter (CSI) and a neural network controller. A new ES configuration that includes CSIs is introduced to enhance ES functionality. This configuration is accompanied by a control strategy that involves direct current control and mitigation of harmonic distortion, like the methods used in active power filters (APFs). By transitioning from voltage source inverters (VSIs) to CSIs and integrating a neural network controller, a significant reduction in total harmonic distortion (THD) can be achieved. The paper presents two distinct control loops, each equipped with proportional-integral (PI) controllers. One loop is focused on regulating the Critical load voltage (CL voltage), while the other is specifically designed for reactive power compensation.
Strategic route for impending green hydrogen energy in Oman
Authors: Aqeel Ashraf Syed , Rao Ch. Venkateswara , Khan Khaliquzzaman , Mohatram Mohammad , Ahmad Afaq , Jahan Shah , Ramya Ch.
Published: January 2024

Since energy and its sustainability are key global issues, extensive research is currently underway to advance the emerging energy sector. Hydrogen is anticipated to assume a substantial role as a worldwide energy carrier in forthcoming energy frameworks. Oman has set an ambitious target to annually produce one million tons of green hydrogen by 2040, aspiring to become one of the leading global producers and exporters of green hydrogen. These hydrogen scenarios are integral components of the broader global energy scenarios, primarily focused on achieving decarbonization. Green hydrogen serves as a pivotal element in Oman’s pursuit of de-carbonization, as well as its economic and energy security objectives. This paper aims to accentuate the challenges associated with hydrogen development, particularly in the context of green hydrogen production, by examining both present and future advancements. It provides a comprehensive overview of the consumption, applications, and economic considerations of green hydrogen based on expert organizations’ projections. Additionally, the paper addresses key considerations pertaining to the utilization and transportation of hydrogen as compared to electricity.
Design and Practical Application of a Cost Effective Intelligent Female Surveillance System Using GPS, GSM, and Arduino Technology
Authors: Kar Rajib Kumar , Murugan A.S.S. , Obulesu D. , Shravani Ch.
Published: January 2024

This paper suggests a cost effective, portable and intelligent surveillance system for women that they can utilize in risky or emergency situations. In this design, an Arduino Nano microcontroller, a GPS module, and a GSM module are the main parts used. Whenever an emergency arises, the user can instantly send an emergency message to a preset phone number along with their current location. The emergency activation button is in a handy place on the gadget, which is tiny enough to carry in a pocket or purse. This device will improve women's protection and security, particularly in places with high crime rates or poor public safety.
Artificial Intelligence-Enabled Techno-Economic Analysis and Optimization of Grid-Tied Solar PV-Fuel Cell Hybrid Power Systems for Enhanced Performance
Authors: Soni Pooja , Bhargavi R. Naveena , Dave Vikramaditya , Paliwal Hemani
Published: January 2024

The incorporation of energy from renewable sources into the power grid is crucial for achieving sustainable and environmentally friendly power generation. This study proposes an artificial intelligence (AI)-enabled methodology for the analysis & optimization of “grid-tied solar photovoltaic (PV)-fuel cell hybrid power systems.” The research aims to demonstrate how AI techniques can assist in decision-making, improve system performance, and achieve higher levels of energy efficiency and financial viability. The study presents the results of a project focusing on a renewable energy system that feeds into the grid and powers a university building. The hybrid power system’s performance and cost were evaluated using unified approaches to modeling, simulation, optimization, and control. The findings indicate that the AI-optimized “solar PV-fuel cell hybrid system connected to the grid” offers excellent performance, meeting 74% of the building’s energy needs through renewable sources. The system also achieved a low levelled price for energy and minimise CO2 emissions, further enhancing its environmental sustainability. The proposed AI-enabled approach proves to be a promising solution for creating grid-connected renewable energy systems with significant benefits for energy efficiency, cost-effectiveness, and environmental impact.
Efficient Nano-Scale Design of TIEO Based Reversible Logic Toffoli Gate Priority Encoder in Quantum-Dot Cellular Automata
Authors: Kalpana K. , Sivakami K. , Revathi N. , Deepa S.M. , Teresa V.V.
Published: January 2024

The goal of this research is to create a QCA-based reversible priority encoder. It is one of the most crucial parts of the encoding and decoding process. This novel nanotechnology, known as quantum-dot cellular automata (QCA), shows promise as a foundation for the development of reversible circuits. This paper proposes a simple, reversible, 4-2 line priority encoder design for the QCA platform. Using the simple and cheap Toffoli gate architecture, a reversible encoder circuit may be built. To analyze the proposed designs’ structural soundness, the simulation program QCA Designer is used.
Dissecting The Analects: an NLP-based exploration of semantic similarities and differences across English translations
Authors: Yang Liwei , Zhou Guijun
Published: January 2024

The Analects, a classic Chinese masterpiece compiled during China’s Warring States Period, encapsulates the teachings and actions of Confucius and his disciples. The profound ideas it presents retain considerable relevance and continue to exert substantial influence in modern society. The availability of over 110 English translations reflects the significant demand among English-speaking readers. Grasping the unique characteristics of each translation is pivotal for guiding future translators and assisting readers in making informed selections. This research builds a corpus from translated texts of The Analects and quantifies semantic similarity at the sentence level, employing natural language processing algorithms such as Word2Vec, GloVe, and BERT. The findings highlight semantic variations among the five translations, subsequently categorizing them into “Abnormal,” “High-similarity,” and “Low-similarity” sentence pairs. This facilitates a quantitative discourse on the similarities and disparities present among the translations. Through detailed analysis, this study determined that factors such as core conceptual words, and personal names in the translated text significantly impact semantic representation. This research aims to enrich readers’ holistic understanding of The Analects by providing valuable insights. Additionally, this research offers pragmatic recommendations and strategies to future translators embarking on this seminal work.
Computation of the masses of the elementary particles
Authors: Mashford John
Published: January 2024

An approach to gauge theory in the context of locally conformally flat space–time is described. It is discussed how there are a number of natural principal bundles associated with any given locally conformally flat space–time X. The simplest of these principal bundles is the bundle PX(G) with structure group G = U(2, 2). An 11-dimensional bundle Q with structure group a certain seven-dimensional group K is constructed by a method involving a reduction of structure group for the bundle PX(G). It is shown how the gauge groups U(1), SU(2), and SU(3) can be derived from the geometry of locally conformally flat space–time. Fock spaces of multiparticle states for the fields of the standard model are constructed in the context of bundles with these groups as structure groups. Scattering and other particle interaction processes are defined in terms of linear maps between multiparticle state spaces. A technique for computing analytically and/or computationally the masses of the elementary particles is described. This method involves the computation of a certain quantity called the integral mass spectrum for a given family of particles and then the masses of the particles in the family are determined to be the locations of the peaks of the integral mass spectrum. The method is applied successfully in the electroweak sector to the cases of the charged leptons, μ and τ, and the Z0 particle.
The interfacial features in photoluminescence of In0.52Al0.48As/InP distinguished with selective excitation
Authors: Hu Xiao , Zha Fang-Xing , Zhan Jia , Liu Bo-Wen , Gu Yi , Shao Jun
Published: January 2024

The photoluminescence experiment was performed at 77 K on two types of heterostructures of In0.52Al0.48As/InP grown by molecular beam epitaxy. One type has the so-called direct interface formed with In0.52Al0.48As grown on the InP (100) substrate, and another is a double heterostructure type, i.e., InP/In0.52Al0.48As/InP, including the inverse interface formed with the InP cap. The thickness of both the as-grown InAlAs and InP layers is 2 µm. Under the excitation of 852 nm semiconductor laser, a single peak at 1.198 eV (P0) was observed for the direct interface whereas the inverse interface showed two peaks at 1.240 eV (P1) and 1.117 eV (P2). However, P2 manifests differently from P1 with two interesting features. First, it disappears when the excitation was replaced with the 532 nm laser. Second, when the cap layer of InP/In0.52Al0.48As/InP is thinned to 200 nm, P2 displays a large blueshift effect with the increase in laser intensity, but the extent of blueshift drops when the excitation is increased further into a higher power range. The phenomenon of P2 was attributed to the interface excitation-induced interplay between the luminescence with a carrier localization effect and that caused by the recombination of 2-dimensional electrons with the light-injected holes in the potential well at the interface.
Research on intelligent analysis device for dynamic error of electric energy
Authors: Yang Wenjing , Wang Gang , Gao Wei , Yin Jingyu , Wu Weitao
Published: January 2024

With the development of smart grids, the introduction of intermittent energy and the increase in dynamic loads have led to more and more dynamic characteristics of electricity loads in the grid. Intelligent energy meters that passed calibration under steady-state load may not necessarily meet the measurement error requirements under the excitation of dynamic load test signals, and some may even produce significant errors. At present, research on dynamic error testing of intelligent energy meters mainly focuses on establishing models of dynamic error testing signals, and the reasons for the generation of dynamic errors are still unclear. In order to analyze the sources of dynamic errors in intelligent energy meters, this article adopts a mechanism modeling method to establish a full system model of intelligent energy meters, in order to analyze the influence of model parameters of each unit on the dynamic errors of active energy, and provide important theoretical reference for further improving the dynamic error characteristics of energy meters. In addition, identifying the sources of errors has important application value for improving the algorithm of energy metering chips, optimizing the overall design of energy meters, and selecting energy meters in dynamic load scenarios for the power sector.
High survivorship and rapid population growth of the greater bilby (Macrotis lagotis) reintroduced to a feral predator exclosure
Authors: Arkinstall Cassandra M. , FitzGibbon Sean I. , Bradley Kevin J. , Moseby Katherine E. , Murray Peter J.
Published: January 2024

Context The distribution of the threatened greater bilby (Macrotis lagotis) has significantly contracted since the introduction of feral cats and foxes. To counteract these threats, bilbies have been reintroduced to multiple feral predator exclosures and offshore islands across Australia. Aims The aims of this study were to monitor the reintroduction of bilbies to the feral predator exclosure at Currawinya National Park and assess three hypotheses: (1) captive-born founders would establish stable home ranges and utilise habitats similar to those of wild-born bilbies in the exclosure; (2) founders would maintain adequate body condition and weight, enabling the survival of >50% of founders at 12 months post-release; and (3) the population would rapidly increase in the absence of feral predators, due to the high reproductive potential of bilbies. Methods We used VHF/GPS telemetry to compare home range size and habitat use of 12 founders and 11 wild-born bilbies. Founders were monitored intensively to assess reproductive success, weight, body condition and survival. Pouch activity was monitored to examine reproductive output. Spatially explicit capture–recapture modelling was used to estimate population density/size. Key results The population rapidly increased to >450 bilbies after 3 years, and founder survivorship was high (70% at 12 months post-release). Male founder home ranges (248.46 ha ± 97.22) were comparable in size to wild-born males (216.74 ha ± 54.19), but female founder home ranges (51.23 ha ± 12.22) were significantly larger than wild-born females (20.80 ha ± 2.94) (P = 0.04). The doubling of the population between 2021 and 2022 may have resulted in the contraction of female home ranges. Reproductive output decreased significantly in 2022, indicating that reproduction may be density-dependent at high densities. There was a significant relationship between track counts and population estimates, indicating that track counts are a reliable method for estimating population size inside the exclosure. Conclusions This reintroduction has been highly successful to date, demonstrating that bilbies are an adaptable species capable of rapid population growth in the absence of feral predators. Implications Bilbies are a model species for reintroductions to feral predator exclosures due to high survival rates, reproductive output, dietary flexibility and the ability to utilise a broad range of environments.
Localization Dynamics at the Exceptional Point of Non-Hermitian Creutz Ladder
Authors: Zhang 张 S. M. 舒迈 , He 何 T. Y. 天毅 , Jin 金 L. 亮
Published: January 2024

We propose a quasi-one-dimensional non-Hermitian Creutz ladder with an entirely flat spectrum by introducing alternating gain and loss components while maintaining inversion symmetry. Destructive interference generates a flat spectrum at the exceptional point, where the Creutz ladder maintains coalesced and degenerate eigenvalues with compact localized states distributed in a single plaquette. All excitations are completely confined within the localization area, unaffected by gain and loss. Single-site excitations exhibit nonunitary dynamics with intensities increasing due to level coalescence, while multiple-site excitations may display oscillating or constant intensities at the exceptional point. These results provide insights into the fascinating dynamics of non-Hermitian localization, where level coalescence and degeneracy coexist at the exceptional point.
Poly(ether-sulfone)/MWCNT nanocomposites manufactured by powder metallurgy route and their dynamic mechanical properties
Authors: Goyal R K
Published: January 2024

Dynamic mechanical properties of the poly(ether-sulfone) (PES)/multi-walled carbon nanotube (MWCNT) nanocomposites manufactured by powder metallurgical route was discussed for the first time. The structural investigation of the nanocomposites was analysed by x-ray diffraction. At room temperature, both storage modulus and microhardness of the nanocomposites increased by more than 60% while the strengthening efficiency at higher temperatures is several-folds compared to that of neat PES. The nanocomposites exhibited better damping behaviour compared to neat PES. The Cole–Cole plot indicated a good interaction between the PES and the MWCNT. Moreover, the coefficient of reinforcement decreased by 42% while the degree of entanglement increased.
Increasing the robustness of electrodynamic WPT systems with hybrid electromechanical transduction
Authors: Ameye Adrien , Decroix Nicolas , Gibus David , Garraud Nicolas , Gasnier Pierre , Badel Adrien
Published: January 2024

In this paper, we compare the electrical damping capability of low-frequency electrodynamic wireless power transmission (EWPT) systems based on a resonant electromechanical receiver in the context of increasing their mechanical robustness. This study is carried out for piezoelectric (PE) and electrodynamic (ED) transducers. The receiver studied, excited by a distant transmitter coil, consists of a magnet and a resonant cantilever beam, and both ED and PE transducers (hybrid system). A strategy based on dual energy conversion is proposed that takes advantage of each transduction characteristic: the receiver with high-quality-factor is sufficiently sensitive to very weak excitation fields far from the transmitter, while it is robust to strong magnetic fields close to the transmitter by damping its motion. This approach is particularly relevant to increase the robustness of resonant receivers powering moving sensor nodes as the field strength seen by the receiver can vary greatly. This paper aims to evaluate three energy transduction strategies (PE-only, ED-only and hybrid) to both harvest more power and increase EWPT systems robustness by overdamping. An analytical model of the system is presented along with comparison with experimental results from a 71.7 cm3 prototype. When the motion amplitude is limited to 0.7 mm to limit aging, the receiver output 19 mW which outperforms the PE and ED modes alone by a factor of 1.5 and 1.8, respectively. Furthermore, the hybrid receiver can limit the amplitude of motion to 0.7 mm under a magnetic field up to 3.6 mT, which is 2.5 and 1.2 times higher than PE and ED alone, respectively.
The effective field theory of large-scale structure and multi-tracer II: redshift space and realistic tracers
Authors: Mergulhão Thiago , Rubira Henrique , Voivodic Rodrigo
Published: January 2024

We extend the multi-tracer (MT) formalism of the effective field theory of large-scale structure to redshift space, comparing the results of MT to a single-tracer analysis when extracting cosmological parameters from simulations. We used a sub-halo abundance matching method to obtain more realistic multi-tracer galaxy catalogs constructed from N-body simulations. Considering different values for the sample shot noise and volume, we show that the MT error bars on A
s, ω
cdm, and h in a full-shape analysis are approximately 50% smaller relative to ST. We find that cosmological and bias coefficients from MT are less degenerate, indicating that the MT parameter basis is more orthogonal. We conclude that using MT combined with perturbation theory is a robust and competitive way to accommodate the information present in the mildly non-linear scales.
Integrability and solutions of a nonsymmetric discrete Korteweg-de Vries equation
Authors: Mesfun Maebel , Zhang Da-jun , Zhao Song-lin
Published: January 2024

In this paper, we present Lax pairs and solutions for a nonsymmetric lattice equation, which is a torqued version of the lattice potential Korteweg-de Vries equation. This nonsymmetric equation is special in the sense that it contains only one spacing parameter but consists of two consistent cubes with other integrable lattice equations. Using such a multidimensionally consistent property we are able to derive its two Lax pairs and also construct solutions using Bäcklund transformations.
Interfacial DMI in Fe/Pt thin films grown on different buffer layers
Authors: Zhang 张 Wen-Jun 文君 , Wei 魏 Fei 菲 , Liu 刘 Bing 冰 , Zhou 周 Yang 阳 , Kang 康 Shi-Shou 仕寿 , Sun 孙 Bing 兵
Published: January 2024

We study the interfacial Dzyaloshinskii–Moriya interactions (i-DMI) of Fe/Pt bilayers grown on Si substrates with MgO, SiO2, or Ta each as a buffer layer on the basis of wave-vector-resolved Brillouin light scattering (BLS) measurement. The obtained i-DMI energy values for Fe/Pt on MgO, Ta, and SiO2 buffer layers are 0.359, 0.321, and 0.274 mJ/m2, respectively. The large i-DMI value observed in Fe/Pt system on the MgO buffer layer can be attributed to the good interfacial quality and the Rshaba effect at the MgO/Fe interface. Moreover, the MgO/Fe/Pt system, benefiting from better sample quality, exhibits a lower damping factor. Furthermore, layer-resolved first-principles calculations are carried out to gain a more in-depth understanding of the origin of the i-DMI in the Fe/Pt system. The results indicate that in the Fe(110)/Pt(111) system, the substantial DMI energy between Fe spins at the interface is related to a significant change in spin–orbit coupling (SOC) energy in the neighboring Pt layer. In contrast, for the MgO(002)/Fe(002) system, both the DMI and its related SOC energy are concentrated at the interfacial Fe layer. Our investigation will provide a valuable insight into the spintronic community in exploring novel devices with chirality dependence.
Thermal conductivity of GeTe crystals based on machine learning potentials
Authors: Zhang 张 Jian 健 , Zhang 张 Hao-Chun 昊春 , Li 李 Weifeng 伟峰 , Zhang 张 Gang 刚
Published: January 2024

GeTe has attracted extensive research interest for thermoelectric applications. In this paper, we first train a neuro-evolution potential (NEP) based on a dataset constructed by ab initio molecular dynamics, with the Gaussian approximation potential (GAP) as a reference. The phonon density of states is then calculated by two machine learning potentials and compared with density functional theory results, with the GAP potential having higher accuracy. Next, the thermal conductivity of a GeTe crystal at 300 K is calculated by the equilibrium molecular dynamics method using both machine learning potentials, and both of them are in good agreement with the experimental results; however, the calculation speed when using the NEP potential is about 500 times faster than when using the GAP potential. Finally, the lattice thermal conductivity in the range of 300 K–600 K is calculated using the NEP potential. The lattice thermal conductivity decreases as the temperature increases due to the phonon anharmonic effect. This study provides a theoretical tool for the study of the thermal conductivity of GeTe.
A redundant subspace weighting procedure for clock ensemble
Authors: Xu 徐 Hai 海 , Chen 陈 Yu 煜 , Liu 刘 Mo-Chi 默驰 , Wang 王 Yu-Zhuo 玉琢
Published: January 2024

A redundant-subspace-weighting (RSW)-based approach is proposed to enhance the frequency stability on a time scale of a clock ensemble. In this method, multiple overlapping subspaces are constructed in the clock ensemble, and the weight of each clock in this ensemble is defined by using the spatial covariance matrix. The superimposition average of covariances in different subspaces reduces the correlations between clocks in the same laboratory to some extent. After optimizing the parameters of this weighting procedure, the frequency stabilities of virtual clock ensembles are significantly improved in most cases.