bluuebunny/crossref_metadata_2025 huggingface dataset:
The XXL survey
Authors: Šlaus B. , Smolčić V. , Ivezić Ž. , Fotopoulou S. , Willott C. J. , Pendo P. , Vignali C. , Chiappetti L. , Pierre M.
Published: January 2024

We model the evolution of active galactic nuclei (AGN) by constructing their radio LFs. We used a set of surveys of varying area and depth, namely, the deep COSMOS survey of 1916 AGN sources; the wide, shallow 3CRR, 7C, and 6CE surveys, together containing 356 AGN; and the intermediate XXL-North and South fields consisting of 899 and 1484 sources, respectively. We also used the CENSORS, BRL, Wall & Peacock, and Config surveys, respectively consisting of 150, 178, 233, and 230 sources. Together, these surveys account for 5446 AGN sources and constrained the LFs at high redshift and over a wide range of luminosities (up to z ≈ 3 and log(L/W Hz−1)∈[22, 29]). We concentrated on parametric methods within the Bayesian framework, which allowed us to perform model selection between a set of different models. By comparing the marginalised likelihoods and both the Akaike information criterion and the Bayesian information criterion, we show that the luminosity-dependent density evolution (LDDE) model fits the data best, with evidence ratios varying from “strong” (> 10) to “decisive” (> 100), according to the Jeffreys’ interpretation. The best-fitting model gives insight into the physical picture of AGN evolution, where AGN evolve differently as a function of their radio luminosity. We determined the number density, luminosity density, and kinetic luminosity density as a function of redshift, and we observed a flattening of these functions at higher redshifts, which is not present in simpler models. We explain these trends by our use of the LDDE model. Finally, we divided our sample into subsets according to the stellar mass of the host galaxies in order to investigate a possible bimodality in evolution. We found a difference in LF shape and evolution between these subsets. All together, these findings point to a physical picture where the evolution and density of AGN cannot be explained well by simple models but require more complex models either via AGN sub-populations, where the total AGN sample is divided into sub-samples according to various properties, such as optical properties and stellar mass, or via luminosity-dependent functions.
Unveiling the bent-jet structure and polarization of OJ 287 at 1.7 GHz with space VLBI
Authors: Cho Ilje , Gómez José L. , Lico Rocco , Zhao Guang-Yao , Traianou Efthalia , Dahale Rohan , Fuentes Antonio , Toscano Teresa , Foschi Marianna , Kovalev Yuri Y. , Lobanov Andrei , Pushkarev Alexander B. , Gurvits Leonid I. , Kim Jae-Young , Lisakov Mikhail , Voitsik Petr , Myserlis Ioannis , Pötzl Felix , Ros Eduardo
Published: January 2024

We present total intensity and linear polarization images of OJ 287 at 1.68 GHz, obtained through space-based very long baseline interferometry (VLBI) observations with RadioAstron on April 16, 2016. The observations were conducted using a ground array consisting of the Very Long Baseline Array (VLBA) and the European VLBI Network (EVN). Ground-space fringes were detected with a maximum projected baseline length of ∼5.6 Earth’s diameter, resulting in an angular resolution of ∼530 μas. With this unprecedented resolution at such a low frequency, the progressively bending jet structure of OJ 287 has been resolved up to ∼10 parsec of the projected distance from the radio core. In comparison with close-in-time VLBI observations at 15, 43, 86 GHz from MOJAVE and VLBA-BU-BLAZAR monitoring projects, we obtain the spectral index map showing the opaque core and optically thin jet components. The optically thick core has a brightness temperature of ∼1013 K, and is further resolved into two sub-components at higher frequencies labeled C1 and C2. These sub-components exhibit a transition from optically thick to thin, with a synchrotron self-absorption (SSA) turnover frequency estimated to be ∼33 and ∼11.5 GHz, and a turnover flux density ∼4 and ∼0.7 Jy, respectively. Assuming a Doppler boosting factor of 10, the SSA values provide the estimate of the magnetic field strengths from SSA of ∼3.4 G for C1 and ∼1.0 G for C2. The magnetic field strengths assuming equipartition arguments are also estimated as ∼2.6 G and ∼1.6 G, respectively. The integrated degree of linear polarization is found to be approximately ∼2.5%, with the electric vector position angle being well aligned with the local jet direction at the core region. This alignment suggests a predominant toroidal magnetic field, which is in agreement with the jet formation model that requires a helical magnetic field anchored to either the black hole ergosphere or the accretion disk. Further downstream, the jet seems to be predominantly threaded by a poloidal magnetic field.
A method for determining the locations and configurations of magnetic reconnection within three-dimensional turbulent plasmas
Authors: Wang Yulei , Cheng Xin , Guo Yang , Guo Jinhan , Ding Mingde
Published: January 2024

Context. Three-dimensional (3D) reconnection is an important mechanism for efficiently releasing energy during astrophysical eruptive events, which is difficult to be quantitatively analyzed especially within turbulent plasmas.

Aims. In this paper, an efficient method for identifying locations and configurations of 3D reconnection from magnetohydrodynamical (MHD) data is developed.

Methods. This method analyzes the local nonideal electric field and magnetic structure at an arbitrary position. As only performing algebraical manipulations on the discrete field data and avoiding computationally expensive operations such as field-line tracing and root-finding, this method naturally possesses high efficiency. To validate this method, we apply it to the 3D data from a high-resolution simulation of a Harris-sheet reconnection and a data-driven simulation of a coronal flux rope eruption.

Results. It is shown that this method can precisely identify the local structures of discrete magnetic field. Through the information of nonideal electric field and the geometric attributes of magnetic field, the local structures of reconnection sites can be effectively and comprehensively determined. For fine turbulent processes, both qualitative pictures and quantitative statistical properties of small-scale reconnection structures can be obtained. For large-scale solar simulations, macro-scale magnetic structures such as flux ropes and eruption current sheets can also be recognized.

Conclusions. We develop a powerful method to analyze multi-scale structures of 3D reconnection. It can be applied not only in MHD simulations but also in kinetic simulations, plasma experiments, and in situ observations.
High-resolution spectroscopy of the young open cluster M 39 (NGC 7092)
Authors: Alonso-Santiago J. , Frasca A. , Catanzaro G. , Bragaglia A. , Magrini L. , Vallenari A. , Carretta E. , Lucatello S.
Published: January 2024

M 39 is a nearby young open cluster hardly studied in the last few decades. No giant is known among its members and its chemical composition has never been studied. In order to investigate it, we performed high-resolution spectroscopy of 20 expected cluster members with the HARPS and FIES spectrographs. By combining our observations with archival photometry andGaia-DR3 data we searched for evolved members and studied cluster properties such as the radial velocity, extinction, and age. For the first time, we provide stellar parameters and chemical abundances for 21 species with atomic numbers up to 56. We have not found any new giant as a likely member and we notice a negligible reddening along the cluster field, which we place at 300 pc. We obtain a mean radial velocity for M 39 of −5.5 ± 0.5 km s−1and an isochrone-fitting age of 430 ± 110 Ma, which corresponds to a MSTO mass of around 2.8M⊙. This value is consistent with the Li content and chromospheric activity shown by its members. Based on main-sequence stars, the cluster exhibits a solar composition, [Fe/H] = +0.04 ± 0.08 dex, compatible with its Galactocentric location. However, it has a slightly subsolar abundance of Na and an enriched content of neutron-capture elements, specially Ba. In any case, the chemical composition of M 39 is fully compatible with that shown by other open clusters that populate the Galactic thin disc.
The occurrence rate of galaxies with polar structures may be significantly underestimated
Authors: Mosenkov A. V. , Bahr S. K. H. , Reshetnikov V. P. , Shakespear Z. , Smirnov D. V.
Published: January 2024

Polar-ring galaxies are photometrically and kinematically decoupled systems that are highly inclined to the major axis of the host. These galaxies have been explored since the 1970s, but the rarity of these systems has made such systematic studies difficult. However, over 250 good candidates have been identified. In this work, we examine a sample of over 18 000 galaxies from the Sloan Digital Sky Survey (SDSS) Stripe 82 for the presence of galaxies with polar structures. Using deep SDSS Stripe 82, DESI Legacy Imaging Surveys, and Hyper Suprime-Cam Subaru Strategic Program, we selected 53 good candidate galaxies with photometrically decoupled polar rings, 9 galaxies with polar halos, 6 galaxies with polar bulges, and 34 possibly forming polar-ring galaxies, versus 13 polar-ring candidates previously selected in Stripe 82. Our results suggest that the occurrence rate of galaxies with polar structures may be significantly underestimated, as revealed by the deep observations, and may amount to 1–3% of non-dwarf galaxies.
LQAC-6: Sixth Release of the Large Quasar Astrometric Catalogue
Authors: Souchay J. , Secrest N. , Sexton R. , Barache C.
Published: January 2024

Context. In addition to being objects of intense interest for cosmology and studies of the evolution of the universe, quasars are used to define quasi-inertial positions on the celestial sphere. Since its first publication in 2009, the purpose of the Large Quasar Astrometric Catalogue (LQAC) has been to provide the largest catalogue of bona fide quasars suitable for astrometry, with the high-precision positions from Gaia becoming available in the fourth release (LQAC-4).

Aims. Following the same kind of procedure as in the previous releases of the LQAC, our aim is to compile the maximum number of recorded quasars, with optimised equatorial coordinates and fundamental information about their physical properties such as the redshift, the photometry, radio fluxes, morphological index.

Methods. New quasars from the SDSS DR16Q release were cross-matched with the precedent LQAC-5 compilation with a 1″ radius, which leads to 225 082 objects not present in the previous LQAC-5 release. Another cross-match was done with the Gaia Celestial Reference Frame 3 (GCRF3) catalogue, which is itself a compilation of a large number of quasars catalogues, accompanied with very accurate Gaia DR3 positions. Moreover, AGN’s coming from 19 individual extragalactic surveys not considered in the previous LQAC compilations are added.

Results. This new LQAC-6 release contains 2 073 099 objects, which is 3.5 times the number of objects recorded in the previous LQAC-5 release. Among them, 1 739 187 objects were found in common with the Gaia DR3, within a 1″ search radius. A large part of new objects belong to the GCRF3 catalogue, which gathers a total number of 1 614 218 objects.

Conclusions. The LQAC-6 delivers a nearly complete catalogue of quasars and AGN’s to the astronomical community, with the aim of giving their best equatorial coordinates with respect to the recent ICRF3 and with exhaustive additional information. For as much as 83.9% of the sample, these coordinates are extracted from the very recent Gaia DR3.
RETRACTED: Energy efficiency assessment of alternative power supply system for isothermal wagon for live fish transportation
Authors: Balalaev A.N. , Korkina S.V. , Plokhov E.M.
Published: January 2024

See the retraction notice BIO Web of Conferences 84, 00001 (2024), https://doi.org/10.1051/bioconf/20248400001
RETRACTED: Exploring the concept of brand sustainability: comprehending its importance and implications
Authors: Kulova Ivelina , Nikolova-Alexieva Valentina
Published: January 2024

See the retraction notice BIO Web of Conferences 84, 00001 (2024), https://doi.org/10.1051/bioconf/20248400001
RETRACTED: Organized natural air exchange in the premises for the maintenance of animals
Authors: Abramkina Darya , Fatullaeva Kaminat
Published: January 2024

See the retraction notice BIO Web of Conferences 84, 00001 (2024), https://doi.org/10.1051/bioconf/20248400001
RETRACTED: 3-year results of hop hybrids testing
Authors: Dementiev D.A. , Fadeev A.A.
Published: January 2024

See the retraction notice BIO Web of Conferences 84, 00001 (2024), https://doi.org/10.1051/bioconf/20248400001
RETRACTED: System dynamics simulation model for efficient on-farm carrot cultivation
Authors: Logachev Maxim , Beresneva Yana
Published: January 2024

See the retraction notice BIO Web of Conferences 84, 00001 (2024), https://doi.org/10.1051/bioconf/20248400001
RETRACTED: Dynamics of hematological and oxidative parameters characterizing the nonspecific resistance of cows under technological stress
Authors: Deryugina Anna , Ivashchenko Marina , Danilova Darya , Kovylin Roman , Polozova Anastasia , Zolotova Marina , Talamanova Marina
Published: January 2024

See the retraction notice BIO Web of Conferences 84, 00001 (2024), https://doi.org/10.1051/bioconf/20248400001
RETRACTED: Influence of environmental factors on physiological state of domestic yak (Bos mutus) (on the example of the Steppe Research Station “Orenburg Tarpania”)
Authors: Platonov Stanislav , Grudinin Dmitrij
Published: January 2024

See the retraction notice BIO Web of Conferences 84, 00001 (2024), https://doi.org/10.1051/bioconf/20248400001
RETRACTED: Decision making in agricultural organizations: integral assessment methodology
Authors: Babkin Alexandr , Burkaltseva Diana , Kirilchuk Svetlana , Apatova Natalia , Vorobyova Elena , Borsch Lyudmila , Nalivaychenko Ekaterina , Blazhevich Oleg , Guk Olga , Bondarenko Daniil , Osmanova Elnara , Polskaya Svetlana , Kalieva Nazira
Published: January 2024

See the retraction notice BIO Web of Conferences 84, 00001 (2024), https://doi.org/10.1051/bioconf/20248400001
RETRACTED: Conceptual foundations of the movement of innovative capital in conditions of priority development of the “green” economy
Authors: Sazonets Igor , Yakovlieva-Melnyk Nataliia , Salenko Andrey
Published: January 2024

See the retraction notice BIO Web of Conferences 84, 00001 (2024), https://doi.org/10.1051/bioconf/20248400001
RETRACTED: The current state of green spaces and their historical changes in Bukhara City
Authors: Yuldosheva Bibirajab
Published: January 2024

See the retraction notice BIO Web of Conferences 84, 00001 (2024), https://doi.org/10.1051/bioconf/20248400001
RETRACTED: Beef production in conditions of stable-pasture and industrial technologies in breeding farms
Authors: Prystupa Vasily , Krotova Olga , Savenkov Konstantin , Azaev Ruslan , Mashtykov Danzan , Boraev Nikita
Published: January 2024

See the retraction notice BIO Web of Conferences 84, 00001 (2024), https://doi.org/10.1051/bioconf/20248400001
RETRACTED: Use of ultrasonic screening in aquaculture for the directed formation sturgeon and salmon fish mature stocks
Authors: Korentovich Marina , Litvinenko Alexander , Egorov Aial , Zenkovich Polina , Litvinenko Liudmila
Published: January 2024

See the retraction notice BIO Web of Conferences 84, 00001 (2024), https://doi.org/10.1051/bioconf/20248400001
RETRACTED: Analysis of 9 microsatellite markers in Kalmyk cattle
Authors: Chimidova Nadezhda , Ubushieva Altana , Ubushieva Victoria
Published: January 2024

See the retraction notice BIO Web of Conferences 84, 00001 (2024), https://doi.org/10.1051/bioconf/20248400001
RETRACTED: Dynamics of desertification of arid ecosystems of Kizlyar pastures
Authors: Ashurbekova Tamila , Magomedova Diana , Omarieva Luisa , Gadzhimusayeva Zaira , Krotova Olga
Published: January 2024

See the retraction notice BIO Web of Conferences 84, 00001 (2024), https://doi.org/10.1051/bioconf/20248400001
RETRACTED: New integrated system for raising poultry as a factor of increasing its productivity and metabolic status
Authors: Semenenko Marina , Kuzminova Elena , Osepchuk Denis , Semenenko Ksenia , Svistunov Andrey
Published: January 2024

See the retraction notice BIO Web of Conferences 84, 00001 (2024), https://doi.org/10.1051/bioconf/20248400001
RETRACTED: Using machine learning algorithms to solve data classification problems using multi-attribute dataset
Authors: Borodulin Aleksey , Gladkov Alexey , Gantimurov Andrei , Kukartsev Vladislav , Evsyukov Dmitriy
Published: January 2024

See the retraction notice BIO Web of Conferences 84, 00001 (2024), https://doi.org/10.1051/bioconf/20248400001
RETRACTED: Future perspectives of artificial intelligence
Authors: Magomedov Islam , Bagov Artur , Tkachenko Alexey
Published: January 2024

See the retraction notice BIO Web of Conferences 84, 00001 (2024), https://doi.org/10.1051/bioconf/20248400001
RETRACTED: Genotypic investigation of drugs resistance and biofilm genes among ciprofloxacin-resistant Pseudomonas aeruginosa isolated from burn patients
Authors: Al-Salami Mohammed Abbas Farman , Tuwaij Nabil Salim Saaid
Published: January 2024

See the retraction notice BIO Web of Conferences 84, 00001 (2024), https://doi.org/10.1051/bioconf/20248400001
RETRACTED: Study of gene expression of Cytokine Genes (TLR-4, NOD-2) in patients with Otitis Media in Al-Najaf Governorate, Iraq
Authors: Al-Fatlawi Manar Mohammed Hadi , Al-Ammar Mahdi Hussain , Al-Manssori Yasir Lafta Hassoun
Published: January 2024

See the retraction notice BIO Web of Conferences 84, 00001 (2024), https://doi.org/10.1051/bioconf/20248400001
RETRACTED: Acute kidney injury as a consequence of the use of anesthesia during surgery: causes and approaches to reducing the risk of
Authors: Merkulova A.P. , Sadigov T.M. , Kuliev T.T. , Kasumov G.R. , Tarasov I.A. , Simonyan T.I.
Published: January 2024

See the retraction notice BIO Web of Conferences 84, 00001 (2024), https://doi.org/10.1051/bioconf/20248400001
RETRACTED: Cutaneous manifestations of endocrine diseases and their assessment in reconstructive surgery
Authors: Khodova M.E. , Torchinova D.A. , Gagloeva K.I. , Tlupova I.Z. , Gabuev E.O.
Published: January 2024

See the retraction notice BIO Web of Conferences 84, 00001 (2024), https://doi.org/10.1051/bioconf/20248400001
RETRACTED: Application of genetically engineered biopharmaceutical products in children with various JIA forms in the Karaganda region
Authors: Kenzhetaeva Tattigul , Serikova Gulmira , Alimshaikhina Kulzhazira , Issayeva Aiman , Sabiyeva Makpal , Sarmankulova Gulmira
Published: January 2024

See the retraction notice BIO Web of Conferences 84, 00001 (2024), https://doi.org/10.1051/bioconf/20248400001
RETRACTED: Comparative study of the resistance level of the organism in schoolchildren with socio-psychological disadaptation among Uzbek population studying in different conditions
Authors: Arzikulov A.Sh. , Abdumukhtarova M.Z. , Mamajanov Z.A. , Nuritdinova G.T. , Arzibekov A.G. , Atajanova Sh.H.
Published: January 2024

See the retraction notice BIO Web of Conferences 84, 00001 (2024), https://doi.org/10.1051/bioconf/20248400001
RETRACTED: Distance learning as a means of forming subjective attitude in physically challenged children
Authors: Bayborodova Lyudmila , Serebrennikov Lev , Shipkova Ekaterina
Published: January 2024

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RETRACTED: Organization of practical training in higher engineering education
Authors: Gritsay Dmitry , Krekova Marina , Parsieva Larisa , Ivashova Valentina
Published: January 2024

See the retraction notice BIO Web of Conferences 84, 00001 (2024), https://doi.org/10.1051/bioconf/20248400001
RETRACTED: Project methods for improving the main parameters of the implementation of projects and programs of socio-demographic development in the regions of the Central Chernozem Economic Region
Authors: Khripkova Dianna , Khripkov Kirill , Vangorodskaya Svetlana , Gaidukova Galina
Published: January 2024

See the retraction notice BIO Web of Conferences 84, 00001 (2024), https://doi.org/10.1051/bioconf/20248400001
RETRACTED: Factors for sustainable development of urban areas
Authors: Pirogova Oksana , Plotnikov Vladimir , Khaltaeva Svetlana
Published: January 2024

See the retraction notice BIO Web of Conferences 84, 00001 (2024), https://doi.org/10.1051/bioconf/20248400001
RETRACTED: Use of landscapes near Tudakul reservoir eficiently
Authors: Mirzoeva Istat , Ergasheva Mavjuda
Published: January 2024

See the retraction notice BIO Web of Conferences 84, 00001 (2024), https://doi.org/10.1051/bioconf/20248400001
RETRACTED: Small “smart energy” based on hybrid distributed generation
Authors: Rustamov Nassim , Babakhan Shokhrukh
Published: January 2024

See the retraction notice BIO Web of Conferences 84, 00001 (2024), https://doi.org/10.1051/bioconf/20248400001
RETRACTED: Simulation modeling of a synergetic chemical reactor control system
Authors: Siddikov Isamidin , Mamasodikov Yusufjon , Mamasodikova Nodira , Jurayeva Gulnozaxon
Published: January 2024

See the retraction notice BIO Web of Conferences 84, 00001 (2024), https://doi.org/10.1051/bioconf/20248400001
RETRACTED: Resources and potential of renewable energy sources: methods for calculating and data sources
Authors: Frid Semen , Muminov Shermuhammad
Published: January 2024

See the retraction notice BIO Web of Conferences 84, 00001 (2024), https://doi.org/10.1051/bioconf/20248400001
RETRACTED: Optimization of geometrical parameters of the heat receiver of a solar air heating collector
Authors: Uzbekov Mirsoli , Kuchkarov Akmal , Boynazarov Bekzod , Toxirov Muxammadrafiq , Muminov Shermuhammad
Published: January 2024

See the retraction notice BIO Web of Conferences 84, 00001 (2024), https://doi.org/10.1051/bioconf/20248400001
RETRACTED: Determination of the useful working coefficient (UWC) of the heating system
Authors: Abdulkhaev Zokhidjon , Abdujalilova Shairakhon , Usmonov Mavlonbek , Askarov Khasanboy , Nazirova Raxnamoxon
Published: January 2024

See the retraction notice BIO Web of Conferences 84, 00001 (2024), https://doi.org/10.1051/bioconf/20248400001
RETRACTED: Urban planning analysis: pre-design stage of the concept for the development of public spaces
Authors: Sheina Svetlana , Gladysheva Olga , Fedorovskaya Albina
Published: January 2024

See the retraction notice BIO Web of Conferences 84, 00001 (2024), https://doi.org/10.1051/bioconf/20248400001
RETRACTED: Digitalization in construction: transformation of procedural approaches and project optimization in order to increase the profitability of the industry
Authors: Zatsarinnaya Elena , Barinov Sergey , Plekhanova Svetlana , Khonchev Mikhail
Published: January 2024

See the retraction notice BIO Web of Conferences 84, 00001 (2024), https://doi.org/10.1051/bioconf/20248400001
Potential market failures in the Portuguese wine industry
Authors: Rebelo João , Baptista Alberto
Published: January 2024

The wine industry is characterized by a monopolistic competition market structure, with high product differentiation. In this study, based on the predictions of microeconomic theory as applied to market equilibrium and market failure, the statistical data on production, trade and domestic consumption, as well as the governance model adopted, were analyzed. The main goal was to examine potential market failures in the Portuguese wine industry, concentrating mainly on those related to information asymmetry and transaction costs. The analysis shows that while Portugal constitutes a significant source of low-priced wines, both for its home consumers as well as for those abroad, most wines lack reputation and therefore have little potential to transfer value to upstream economic agents, and almost no possibility of increasing consumers’ willingness to pay. Though there is detailed information on production, exports and trade, limited information exists on domestic consumption. Given the small dimension of some wine regions, the governance model adopted does not benefit from scale economies and requires higher transaction costs.
Evaluating Energy Storage Technologies for Electric Vehicles: A Comparative Analysis and Battery Management System Overview
Authors: Mishra Heena , Tripathi Abhishek Kumar , Sharma Ayush Kumar , Laxshmi G. Sree
Published: January 2024

In the pursuit of sustainable transportation solutions, Electric Vehicles (EVs) have emerged as a promising alternative. This research paper provides an in-depth exploration of the crucial role played by Battery Management Systems (BMS) and conducts a comprehensive comparative analysis of various energy storage technologies for Electric Vehicles. The paper begins by elucidating the intricate components and functions of BMS through an illustrative block diagram, emphasizing its significance in ensuring safe and optimal battery operation. The study then conducts a meticulous analysis of key battery attributes, including energy density, power density, capacity, charge/discharge rates, life cycles, and cost per kWh. Supported by simulated data, the comparative analysis sheds light on the distinct performance characteristics of different battery types - Lithium-ion (Li-Ion), Lithium Iron Phosphate (LiFePO4), Nickel-Metal Hydride (NiMH), and Ultracapacitor. The outcomes offer a comprehensive perspective on their strengths and trade-offs, providing valuable insights for selecting suitable energy storage solutions. By translating intricate technical information into meaningful insights, this research empowers EV industry stakeholders to make informed decisions for enhanced EV performance, economic viability, and sustainable electric mobility.
MPPT Techniques Exploration under Uniform and Non-Uniform Solar Irradiance Condition–A Survey
Authors: Srikanth M. , Yadlapati Kishore
Published: January 2024

Solar PV has become increasingly popular in the past decade, both for standalone and grid-connected systems. Solar PV systems exhibit non-linear output characteristics due to weather fluctuations, which can substantially impact the overall PV system’s output. Consequently, selecting the optimal MPPT technique for a given PV system is a complex task, as each method has different strengths and weaknesses. Therefore, conducting a comprehensive examination of these techniques is crucial. A survey of academic publications on ‘Google Scholar’ spanning the past seven years (2015-2022) revealed a total of seventy-one review articles addressing various MPPT techniques. Among the studies, seven have directed their attention toward non-uniform solar irradiance, while four have dedicated their focus to uniform conditions. Surprisingly, none have ventured into the realm of hybrid optimization MPPT techniques. Moreover, several of these reviews have covered a restricted range of MPPT methods, and none have delivered an all-encompassing assessment that encompasses both online and offline strategies for uniform conditions, alongside an evaluation of hybrid MPPT techniques in the context of non-uniform solar irradiance conditions. Unfortunately, there have been minimal efforts in this direction. Consequently, the need of the hour is a comprehensive review paper that encompasses nearly all known MPPT techniques within a single publication. This paper places its primary emphasis on categorizing MPPT algorithms into offline, hybrid, and online optimization techniques, addressing both non-uniform and uniform irradiance scenarios. It serves as a comprehensive resource by consolidating diverse MPPT techniques, presenting their mathematical formulations, operational principles, and visual representations through block diagrams and flowcharts. The objective of this research endeavor is to provide a valuable reference for strategists, researchers, and energy engineers, offering them a roadmap to steer future research endeavors and practical implementations in the realm of optimization of MPPT.
Automatic Water level Controller using IOT
Authors: Gurram Janardhan , Kumar P. Vinodh , Pravalika Makam , Rao T. Venkat Narayana
Published: January 2024

Many people living in residential areas experience problems with their water tanks, such as running out of water or experiencing overflow due to an excess supply. It can be difficult for users to judge the water level more precisely in their tanks, leading to potential overflow when the pump is turned on. This project seeks to answer these issues by implementing a water tank management system. By incorporating a water level sensor, users can observe the water level in their tanks and the motor pump will turn on automatically when the water level drops below the lower reference point. In the event of an overflow, the sensor will detect the high-water level and turn the motor pump off automatically, thereby preventing the wastage of water and conserving electrical energy.
Revolutionizing Packaging and Consumer Products: Exploring the Potential of Biodegradable Materials
Authors: Anjimoon Shaik , Sobti Rajeev , K A Jayasheel Kumar , Kumar Ashwani , Parashar Shilpi Chauhan , Hussien Raghad Ahmed
Published: January 2024

The need to reduce environmental degradation has made it more crucial than at any time to identify sustainable packaging and consumer goods solutions. To bring the consumer goods industry into compliance with the Sustainable Development Goals (SDGs), this research investigates the revolutionary potential of biodegradable materials. Through a priority on the lifetime assessment from manufacturing industries to post-consumer waste management, everyone looks at the most recent developments in the biodegradable material sciences and how they apply to packaging design. Our study incorporates findings from various fields to evaluate the social, economic, and environmental effects of biodegradable packaging options. This idea is an original framework that may be incorporated into the supply chain to reduce environmental impact and improve the circular economy principles. According to the research, biodegradable materials stimulate innovation, consumer responsibility, and regulatory compliance and present a practical substitute for conventional packaging. To support sustainable change in the sector, the research investigation ends with suggested strategies for stakeholders that highlight the value of market incentives, consumer education, and regulation. By presenting practical insights into the application of biodegradable materials as a catalyst for eco-innovation in consumer goods, this study advances the conversation on sustainable development.
Solution of OPF Using GA Variant With Inclusion of FACTS Devices
Authors: Priyanka D. , Pulluri Harish , Venkateshwarlu S.
Published: January 2024

Optimal power flow (OPF) is a tool used for minimization through that secured and cost-effective power systems is obtained with the inclusion of FACTS devices for existing power systems that enhance the power transfer ability of the power system, which reduces congestion. The current work proposed a solution to the OPF issue in power systems using genetic algorithm (GA). The proposed technique is implemented on an IEEE 30 bus system by considering the minimization of fuel cost and L-index functions. The results at the end of this paper pre-sent the efficacy of GA algorithm to solve OPF issues in power systems and FACTS devices while comparing it to other algorithms presented previous re-search.
Intrusion Optimal Path Attack detection using ACO for Cloud Computing
Authors: Jaiganesh M. , ShivajiRao G. , Dhivya P. , Udhayamoorthi M. , Antony Kumar A. Vincent
Published: January 2024

As the cloud infrastructure is simultaneously shared by millions of consumers, heinous use of cloud resources are also increasing. It makes ways to attackers to set up attacks by exploiting the vulnerabilities. And obviously, these attacks are leading to severe disasters as innocent consumers are unknowingly sharing cloud resources with harmful attackers. To prevent the occurrence of cloud attacks, attack graph based framework is proposed in this paper. Here, an attack path sketches an attack scenario by a streak of threats ranging in severity rating that shows how popular a particular cloud network service is in comparison. In a dynamic cloud environment, the proposed framework can disclose an optimal attack path thereby preventing cloud attacks. In cloud system the infrastructure is shared by potentially millions of users, which benefits the attackers to exploit vulnerabilities of the cloud. An instrument for analyzing multi-stage, multi-host assault scenarios in networks is the attack graph. It might not be possible for the administrator to patch every vulnerability n a large number of assault paths in an attack graph. The administrator might not be able to fix every vulnerability. To identify the most preferred or ideal assault path from a particular attack graph in a setting Ant Colony Optimization (ACO) algorithm is used.
Social and Techno-economic Impact of Rural Electrification in Isolated Places with Photovoltaic Systems: Evidence Gulf of Guayaquil
Authors: Lata-García Juan , Ampuño Gary , Alvarez Raúl , Parra Pablo
Published: January 2024

The lack of electrification in isolated places is considered the main impediment to the economic development of the inhabitants, the use of new technologies such as solar photovoltaic is considered a viable solution to the problems of electrification however technical, economic and social factors limit the use of form, the work reviews the drivers of rural electrification with new types of renewable energy technologies in Latin America. especially in the Gulf of Guayaquil in Ecuador. For part of the research is taken as a case study an island that is populated by 17 homes where the economic technical study is carried out for the photovoltaic system of 405 Wp, the cost of the implementation is 1663.05 dollars, the cost of energy is 0.258 USD / kWh being a limitation for overcrowding in low-income homes even when they have no possibility of accessing a financial credits the inhabitants of communes. The electrified houses have a saving of USD$25 per month for fuel required for the operation of the generator used for 3 hours a day plus the purchase of candles for lighting at night and early morning. The survey conducted in the community reveals that the best benefit for the inhabitants is that children can receive virtual classes post-pandemic with the energy of the system can feed the antenna of the internet provider.
Agriculture Residue based Electric Power Generation
Authors: Chiranjivi M. , Suresh K. , Kumar A. Anand , Reddy Ch. Lokeshwar , Siddartha M.
Published: January 2024

The foundation of a country’s sustainable economic development rests on the availability of an ample supply of electrical energy. To remain competitive on the global stage, India must ensure the provision of sufficient electricity infrastructure to fuel its economic progress. Achieving developed nation status necessitates extending electricity access to every corner of the country. India, being primarily an agrarian nation, possesses abundant agricultural waste resources. This wealth of agricultural waste presents a valuable opportunity for electricity generation. Notably, agricultural husk emerges as a promising raw material for electricity generation, provided it undergoes proper and systematic processing. This endeavor aims to introduce the concept of electricity generation from agricultural husk, with a particular focus on rural areas in India. Agricultural husk-based small and medium power plants offer a pragmatic solution for generating and distributing electricity to underserved rural communities. Within this paper, we delve into the availability of agricultural husk resources in India, explore various feasibility studies, and elucidate the principal processes for generating electricity from rice husk. The overarching goal is to support India’s journey towards future development. This paper serves as a valuable resource for both governmental and private sector entities interested in establishing agricultural husk-based power plants in rural India. Ultimately, we aspire for this document to serve as a practical guideline for addressing the substantial electricity demand prevalent in India’s rural areas.
Simulation of 4-Leg Inverter based APF for PV based System with Effective Controller
Authors: Divya G. , Swarupa M. Lakshmi , Sunanda S. , Sabitha B.
Published: January 2024

Today’s rising electricity consumption need more robust power plants. As a result, we’re running out of fossil fuels, which increases pollution. As a result, we are shifting to renewable energy sources, which are better for the environment and save us money in the long run. Power electronic converters are being used more often in distribution networks to link RES. Solar radiation is one of the most widely distributed renewable energy sources worldwide. PV Cell is used to convert solar energy into usable electricity. Consequently, the PV Cell is applied to the converter and disseminated to the matrix later being thus constructed. Numerous controlling issues arise from the non-linear features of the load, despite the fact that numerous methods have been provided for modelling and engineering the PV cell and its point of interaction to the matrix. This exploration presents another control strategy for advancing the exhibition of these framework connecting inverters in 3-stage 4-wire appropriation organizations. The inverter is customized to fill a few needs by including a functioning power channel. To adapt to flow unevenness, load flow music, receptive power interest, and burden impartial flow, the inverter might act as a power converter while infusing power created from RES into the lattice, and as a shunt dynamic power channel while adjusting the framework’s current. It is feasible to do every one of these activities independently or at the same time. An inverter that connection points with the lattice and a 3-stage, 4-wire straight/non-direct lopsided burden at the purpose in like manner coupling might be made to appear to the network as a fair direct burden by using this kind of control. Extensive MATLAB/Simulink simulation experiments prove the efficacy of this novel control strategy.
EV BMS With Charge Monitor and Fire Detection
Authors: Mastanamma Y. , Laxman Bhukya , Archana A. , Reddy K. Pulla
Published: January 2024

Electric vehicles (EVs) are undoubtedly the way of the future. However, as of 2023, EV technology has not reached its full potential in terms of efficiency and safety. The cause of majority of the electric vehicle fire events is a battery explosion or fire. This paper presents an integrated approach to manage EV battery systems, which combines a Battery Management System (BMS) with charge monitoring and fire detection. The system is built to continuously monitor the battery’s voltage, current, and temperature and to immediately turn off the battery’s input or output if any unexpected behaviour is noticed.
Wind Power Prediction Model Using Artificial Neural Network
Authors: Dias Fedora , Naik Anant J.
Published: January 2024

Renewable energy plays a vital role in energy management and hence resultant sus-tainable development. The uncertainty of its availability is the point of concern. Hence the optimal usage and prediction of its availability become very critical. Several methods of wind energy forecasting at any given location are available in the literature. In this article, a machine learning-based wind energy forecasting method is suggested. The wind data and related parameters at Satara district of Maharashtra state in India are obtained. ANN (Artificial Neural Network) model is developed, trained, tested, and validated for the available data. The results obtained for future wind energy predicted approximately match the actual values.
IOT based Smart Unlawful Electricity Usage Surveillance and Warning System
Authors: Murugan A.S.S. , Kar Rajib Kumar , Rajitha M. , Karuppiah N.
Published: January 2024

The global issue of electricity theft has a negative impact on both the utilities and the people who use the energy. It impairs utility company economic growth, creates electrical risks, and has an effect on consumers' expenses for electricity. The emergence of smart grids is crucial for the detection of power theft as they provide vast amounts of data, including information on consumer consumption that can be used to identify theft using over voltage and over current detection methods. The solution presented in this article employs an Arduino uno micro controller board and IOT to monitor and maintain surveillance on power theft. An alarm with SMS notification will be sent to the officials and the power will be shut off whenever there is a power outage or tampering with an energy meter.
Significance of Bioactive Coatings for Medical Implants
Authors: Kumar S. Vinod , Kansal T Lavish , Prashanth Kumar S Sunil , Kalra Ravi , Dhamija Koushal , Mohammad Q.
Published: January 2024

The field of implants is being redefined by bioactive coatings, which have become a pioneering area in medical implants. These unique coatings, packed with bioactive molecules, have an exceptional ability to interact with the adjacent biological surroundings, facilitating osseointegration, providing antimicrobial qualities, and contributing to overall implant function. The present abstract explores the latest improvements and designs in bioactive coatings, focusing on their essential role in enhancing the functionality and durability of medical implants. One of the main goals is integrating cutting-edge materials, like hydroxyapatite and bioactive glasses, that encourage implant integration and produce bioactive ions for therapeutic effects. Cell adhesion and regeneration of tissues can be accurately controlled by modifying the surface roughness and porosity of these coatings.Also, the risk of infections—a common concern in implantation surgery—is minimized through antimicrobial agents such as antibiotics and silver nanoparticles. To achieve consistency and longevity in coating deposition, this research also examines the most recent techniques, including plasma spraying and electrospinning.
Invisibility enables super-visibility in electromagnetic imaging
Authors: He Youzi , Li Hongjie , Liu Hongyu , Wang Xianchao
Published: January 2024

This paper is concerned with the inverse electromagnetic scattering problem for anisotropic media. We use the interior resonant modes to develop an inverse scattering scheme for imaging the scatterer. The whole procedure consists of three phases. First, we determine the interior Maxwell transmission eigenvalues of the scatterer from a family of far-field data by the mechanism of the linear sampling method. Next, we determine the corresponding transmission eigenfunctions by solving a constrained optimization problem. Finally, based on both global and local geometric properties of the transmission eigenfunctions, we design an imaging functional which can be used to determine the shape of the medium scatterer. We provide rigorous theoretical basis for our method. Numerical experiments verify the effectiveness, better accuracy and super-resolution results of the proposed scheme.
High areal-capacitance based extremely stable flexible supercapacitors using binder-free exfoliated graphite paper electrode
Authors: Yadav Jitendra Kumar , Rani Bharti , Tiwari Ajay , Dixit Ambesh
Published: January 2024

The highly porous and binder-free flexible paper electrodes can enhance the specific capacitance of symmetric supercapacitors (SCs) due to their large surface and effective ion diffusion pathways. We synthesized the exfoliated graphite (ExG) by the thermal exfoliation method of chemically treated graphite flakes and compressed it into a paper-like thin sheet (binder-free) of ∼0.15 mm thickness. The coin cell SCs with copper (Cu) and stainless steel (SS) as current collectors have been fabricated for the electrochemical measurement. The cyclic voltammetry and galvanostatic charge/discharge measurements are investigated at various scan rates and current densities. The SCs with Cu foil as a current collector perform better than SS-based SCs. The Cu current collector-based SCs showed a specific capacitance of 37.08 mF cm−2, whereas it was ∼29.98 mF cm−2 for SS-based SCs at a 0.01 V s−1 scan rate across a 0–0.6 V potential window. Approximately no degradation in charge storage capacity for more than 15 000 cycles at 0.1 V s−1 shows the ultra-stability of the flexible ExG-based binder-free electrodes. A digital watch is powered using the fabricated pouch cell supercapacitor with copper-based current collectors to show the potential of SCs.
Influence of wildfire and feral horse use on mule deer summer range occupancy
Authors: Platte Ryan C. , Torland Ryan E.
Published: January 2024

Context Mule deer (Odocoileus hemionus) are a species of social, economic and cultural importance that are experiencing a population decline throughout much of their range. Factors such as disease, landscape-level changes in nutritional output of forage species, winter habitat degradation, habitat fragmentation, competition for resources with both domestic and wild ungulates, and predation have all been implicated in the decline. Recently, summer habitat quality in Oregon has been identified as a potentially strong limiting factor for mule deer population performance. Competition and habitat degradation from feral horses (Equus caballus) have been proposed as factors potentially exacerbating existing habitat limitations for mule deer. Aims The aim of this study was to investigate factors affecting mule deer summer range occupancy within a study area that experienced both wildfires and the presence of feral horses. Methods We deployed 72, 77 and 75 camera traps throughout the Murderers Creek and Northside wildlife management units located in north-eastern Oregon during summer 2019, 2020 and 2021 respectively. We used an occupancy modelling framework to build and evaluate models of mule deer summer range occupancy related to competition, vegetation and abiotic variables. Key results Our final model set included four covariates: (1) an index of feral horse use; (2) whether the site was disturbed by wildfire; (3) distance to forest edge; and (4) eastness of the site. Model averaging indicated that mule deer probability of occupancy was negatively related with increased feral horse use and distance to forest edge, and positively related to eastern slopes and sites within a wildfire perimeter. Conclusions Our results add to the growing body of literature indicating that wildfires in forested ecosystems benefit mule deer and add to the limited body of literature indicating that feral horse use of a site negatively impacts mule deer. Implications Managers should incorporate fire into forest restoration projects when possible to benefit mule deer. Where feral horses and mule deer overlap, increased management of feral horse herds could potentially benefit mule deer. Lastly, our research showcases the utility of camera traps coupled with occupancy modelling to answer research questions that, in the past, were mainly answered through radio collaring.
Complexity growth in a holographic QCD model*
Authors: Chang 常 Wen-Bin 文彬 , Hou 侯 De-fu 德富
Published: January 2024

In this study, we utilize the complexity-action duality to study the evolution of complexity in a holographic QCD model at finite temperature and chemical potential. By inserting a fundamental string as a probe, we investigated the properties of complexity growth in this Einstein-Maxwell-scalar gravity system, which is affected by the string velocity, chemical potential, and temperature. Our results show that the complexity growth is maximized when the probe string is stationary, and it decreases as the velocity of the string increases. When the string approaches relativistic velocities, the complexity growth always increases monotonically with respect to the chemical potential. Furthermore, we find that the complexity growth can be used to identify phase transitions and crossovers in the model.