bluuebunny/crossref_metadata_2025 huggingface dataset:
HREE-DIMENSIONAL SIMULATION OF ELECTROMAGNETIC AND HYDRODYNAMIC PROCESSES IN A REVERBERATORY FURNACE FOR ALUMINUM WITH AN ELECTRIC VORTEX CHAMBER
Authors:   Institute of Electrodynamics of the National Academy of Sciences of Ukraine, Beresteiskyi ave., 56, Kyiv, 03057, Ukraine, Penkovyi T.O. , Bondar O.I. ,   Institute of Electrodynamics of the National Academy of Sciences of Ukraine, Beresteiskyi ave., 56, Kyiv, 03057, Ukraine, Goryslavets Yu.M. ,   Institute of Electrodynamics of the National Academy of Sciences of Ukraine, Beresteiskyi ave., 56, Kyiv, 03057, Ukraine
Published: November 2024

On the basis of the developed mathematical model, a three-dimensional numerical study of electromagnetic and hydrodynamic processes was carried out in a reverberatory melting furnace with an electric vortex chamber in the form of a cylindrical chamber with a curve inductor, which performs two functions: it stirs the molten metal in the furnace bath and immerses the crushed metal scrap in the melt and then transports it to the melting bath. The influence of the height of the connecting channels and the angle of connection to the chamber of the pressure channel on three integral parameters is investigated: the average velocity of the metal in the furnace bath, the melt flow through the cross section of the channels, and the average angular velocity of the metal in the vortex chamber. As a result of the simulation, it was established that with the growth of the relative height of both channels, the first two parameters that characterize the chamber as an electromagnetic stirrer of metal in the furnace bath increase, and the third parameter that defines it as a device for immersing scrap, decreases. As for the angle of connection of the pressure channel, the opposite is true here - with an increase in the angle, the average velocity of the melt in the furnace bath and its flow through the channels decrease, while the average angular velocity of the metal in the chamber increases. It was concluded that in practice it is necessary to find (choose) such compromise values of the height of the channels and the angle of their connection, which would ensure the implementation of both specified functions at a given level. Ref. 8, fig.7.
ASSESSMENT OF THE EFFICIENCY OF SMALL MODULAR NUCLEAR REACTOR ON THE ELECTRICITY MARKET
Authors:   Institute of Electrodynamics of the National Academy of Sciences of Ukraine,  Beresteiskyi ave., 56, Kyiv, 03057, Ukraine, Parus E.V. , Blinov I.V. ,   Institute of Electrodynamics of the National Academy of Sciences of Ukraine,  Beresteiskyi ave., 56, Kyiv, 03057, Ukraine, Kostikov A.O. ,   Pidhornyiʹs Institute of Energy Machines and Systems of NAS of Ukraine,  Pozharsʹkoho St., 2/10, Kharkiv, 61046, Ukraine
Published: November 2024

A mathematical model for constructing an optimal loading schedule of a power unit with a small modular nuclear reactor is presented. The main conditions of operation of small modular nuclear reactors with constructive solutions similar to the development of NuScale are determined, and the architecture of the mathematical model for the search of optimal schedules of their operation is presented. The main attributes of the operating modes of small modular nuclear reactors and a mathematical model for simulating the control functions of the reactor operation schedules have been determined. The main components for displaying the results of purchase-lease/sale of electricity by the power-generating company have been determined. The objective function of maximizing the benefit from the operation of a small modular nuclear reactor and limiting the profitability of its operation is given. The basics of the methodology of using the model for building the optimal daily schedule of the functioning of a small modular nuclear reactor in the tasks of assessing the effect of the construction and operation of such reactors at a nuclear power plant have been formulated. Ref. 15, fig. 4, table.
DAILY OPTIMIZATION OF THE WORKING SCHEDULE OF THE HYDROELECTRIC PLANT TAKING INTO ACCOUNT THE NONLINEAR FUNCTION OF THE COSTS OF OWN NEEDS
Authors:   Institute of Electrodynamics of the National Academy of Sciences of Ukraine, Beresteiskyi ave., 56, Kyiv, 03057, Ukraine, Olefir D. , Parus E. ,   Institute of Electrodynamics of the National Academy of Sciences of Ukraine, Beresteiskyi ave., 56, Kyiv, 03057, Ukraine, Rybyna O. ,   Institute of Electrodynamics of the National Academy of Sciences of Ukraine, Beresteiskyi ave., 56, Kyiv, 03057, Ukraine, Miroshnyk V. ,   Institute of Electrodynamics of the National Academy of Sciences of Ukraine, Beresteiskyi ave., 56, Kyiv, 03057, Ukraine
Published: November 2024

A mathematical model of the daily distribution of the available hydro resources of the dam hydroelectric power station is presented, taking into account the non-linear function of technological costs of electrical energy. The profit function from the sale of electric energy in the Day-ahead market is given. A linear and non-linear function of costs for the purchase of electric energy to cover the own power consumption needs of HPP generators under different modes of their loading is presented. The objective function of the profit from the sale of electricity on the day-ahead market is presented, taking into account the cost of purchasing electricity to cover the technological needs of the operation of hydropower generators in different loading modes. The system of limitations of hydro resources in the technological node "Reservoir - HPP" is given. Test calculations were performed using the presented mathematical models and the results of such calculations were analyzed. Ref. 8, fig. 3.
MONITORING OF THE EFFICIENCY IN LOCAL ELECTRISITY SYSTEMS
Authors:   National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute” Beresteiskyi Ave., 37, Kyiv, 03056, Ukraine, Denysiuk S. , Bielokha H. ,   National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute” Beresteiskyi Ave., 37, Kyiv, 03056, Ukraine, Hilevich K. ,   National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute” Beresteiskyi Ave., 37, Kyiv, 03056, Ukraine, Cherneshchuk I. ,   National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute” Beresteiskyi Ave., 37, Kyiv, 03056, Ukraine
Published: November 2024

The local electricity system is a decentralized grid, one of the tasks of which is the optimized management of distributed energy resources. To achieve effective integration and interaction in the work of local systems at the level of residential and commercial buildings, a set of systems and algorithms that are combined into monitoring systems is required. A transactive energy system allows multiple interconnected buildings to exchange energy for greater energy efficiency. The article presents the peculiarities of monitoring such systems, the method of assessing the efficiency of the local system and the assessment of the unevenness of the energy consumption schedules when powering the elements of the local system. The introduction of modern programs (mechanisms) of demand side management to participate in the balancing of supply and demand is considered. The application of demand management mechanisms for a local system with non-intrusive load monitoring and an energy management system based on transactive energy approaches and methods is considered. Bibl 14, fig. 2.
Sorption of benzene from aqueous solutions by aerosilogel with chemically fixed β-cyclodextrin groups
Authors:   Chuiko Institute of Surface Chemistry of National Academy of Sciences of Ukraine, Lyashenko D.Yu.
Published: November 2024

Benzene and its derivatives, which belong to highly toxic organic substances, have hydrophobic properties and will probably be removed from water environments by sorbents on the surface of which there are hydrophobic ligands, for example, cyclodextrins. Their molecules have a unique torus structure with wide and narrow holes, on which secondary and primary hydroxyl groups are located, respectively, and are characterized by a hydrophobic inner cavity and hydrophilic properties of the torus surface. Due to the hydrophobic cavity, these molecules are able to form inclusion complexes of the "host-guest" type with the help of non-specific interactions (van der Waals forces, hydrogen bonds and hydrophobic interactions) with many organic molecules of the size corresponding to thorium. The purpose of the work is to determine the sorption capacity of the original and modified with aminopropyl and β-cyclodextrin functional groups aerosilogels with respect to benzene from aqueous solutions. The sorption of small concentrations of benzene from aqueous solutions by aerosilogels with silanol, grafted aminopropyl and surface
β-cyclodextrin-containing groups was studied by spectrophotometry, depending on the duration of contact and the equilibrium concentration. It has been demonstrated that all β-cyclodextrin groups attached to the surface of the aerosilogel participate in benzene sorption and possibly form surface complexes of the "host-guest" type with benzene molecules. The obtained results were analyzed using kinetic models for pseudo-first and pseudo-second order processes. High kinetic parameters of benzene sorption by aerosilogel grafted with β-cyclodextrin groups were established. It is shown that sorption kinetic processes are well described by a pseudo-first-order equation. Based on the calculations of equilibrium sorption parameters within the framework of the Langmuir and Freundlich models, it was proved that the experimental results of the equilibrium sorption of benzene on β-cyclodextrin-containing aerosilogel are in good agreement with the Langmuir adsorption equation, which proves the decisive contribution of grafted
β-cyclodextrin groups to benzene sorption. It has been demonstrated that the introduction of
β-cyclodextrin groups into the surface layer of aerosilogel significantly increases its selectivity and will contribute to an increase in affinity for benzene and its derivatives.
Thermal - vacuum process producing nanodispersed materials
Authors:   National Scientific Center Kharkov Institute of Physics and Technology of National Academy of Sciences of Ukraine, Kutovyi V. O.
Published: November 2024

Experimental methodology of the thermal vacuum process is that in order to obtain effective and economical production of nanomaterials, it is necessary to ensure a continuous flow of dispersed material inside the heating spiral element. This can done if the material enters the cavity of the heating element together with air. A two-phase system of gas-solid particles arises. The movement occurs in an ascending flow in a heated space with a constant decrease in pressure for 15 s. The results of the studies show that the velocity of material particles in the cavity of spiral heating element of the thermal vacuum unit depends on the thermal radiation of the heater walls, the energy of a local pulsed steam explosion with the appearance of a shock wave, which forms a significant number of nanodispersed and finely dispersed bodies. The greater the energy of the local explosion, the higher the velocity of the material particle, the greater the angle of incidence of the particle on the opposite wall of the heating element. Locally, the temperature of the external environment increases, the kinetic energy of material particles grows, and the flow of electrons, protons, and other charged particles accelerates significantly. A plasma clot is formed, a neutrino cloud is emitted. Nanoparticles take the form of nanotubes, fullerenes, thin films, crystals. It been established that the dispersed material in the thermal vacuum unit is successively affected by force, heat, deformation, ionization effects, which allows accelerating the process of obtaining nanodispersed materials. Each physical process in a thermal vacuum installation has its own space-time continuum and it is necessary to take into account only those characteristics that correspond to a specific interaction.
Claudine Brécourt-Villars: Mots de Table, Mots de Bouche: Dictionnaire étymologique et historique du vocabulaire classique de la cuisine et de la gastronomie
Authors: Lehmann Gilly
Published: November 2024

Claudine Brécourt-Villars: Mots de Table, Mots de Bouche: Dictionnaire étymologique et historique du vocabulaire classique de la cuisine et de la gastronomie: Stock, Paris, 1996: ISBN 2-234-04693-9: 429 pp., p/b, FF160.
Hugh Fearnley-Whittingstall: The River Cottage Cookbook
Authors: Davidson Alan E
Published: November 2024

Hugh Fearnley-Whittingstall: The River Cottage Cookbook: HarperCollins, 2001: ISBN 0-00-220204-2:448 pp., photographs by Simon Wheeler, h/b, £19.99.
Disclosure of the Dimensions of Social Responsibility and Its Impact on Economic Value Added: Evidence from Industrial Companies
Authors:   Department of Financial Technology and Banking, Faculty of Business, Ajloun National University, Ajloun, Jordan,, Al-khawaja Haneen A. , Alshehadeh Abdul Razzaq ,   Faculty of Business, Al-Zaytoonah University of Jordan, Saad Hassan Taysir ,   Faculty of Business, Al-Zaytoonah University of Jordan, Abdullah Ahmed Adel Jameel ,   Faculty of Business, Al-Zaytoonah University of Jordan, Hatamleh Habes Mohammad ,   Faculty of Educational Sciences, Jadara University
Published: November 2024

This study aimed to examine the impact of disclosing the dimensions of corporate
social responsibility, as outlined in the international standard ISO26000, on the
economic value-added EVA of pharmaceutical and chemical companies listed on
the Amman Stock Exchange. The dimensions explored include environmental
issues, community participation and development, corporate governance,
consumer issues, labor practices, fair operational practices, and human rights. The
study population consisted of 53 industrial companies listed on the Amman Stock
Exchange, with a sample of 14 pharmaceutical and chemical companies. To
achieve the study's objectives, the researchers collected data from the companies'
annual financial reports spanning the period 2018-2022 and analyzed them using
simple and multiple linear regression.
The findings revealed that the disclosure of corporate governance, environmental
issues, consumer issues, and community participation and development had a
significant impact on the (EVA)of the pharmaceutical and chemical companies.
However, the results showed no impact of the disclosure of human rights, fair
operational practices, and labor practices on the EVA of these companies. These
results suggest that the current legislative framework for the disclosure of
corporate social responsibility dimensions has a clear deficiency, as it primarily
focuses on environmental activities and community participation, neglecting the
other aspects outlined in the international standard ISO26000. Addressing this gap
could lead to a positive impact on the companies' performance and, consequently,
improve their EVA. The study's findings call for the development of a more
comprehensive legislative framework that requires the disclosure of all the
dimensions of corporate social responsibility, as outlined in ISO26000. This would
likely contribute to enhancing the EVA of pharmaceutical and chemical
companies listed on the Amman Stock Exchange
A New Approach of Virtual Reality Systems Evaluation and Quality Standards
Authors:   Prince Abdullah bin Ghazi Faculty of Information and Communication Technology, Al-Balqa Applied University, Salt, Jordan, Khalil Raed , Wedyan Mohammad ,   Department of Computer Sciences, Faculty of Information Technology and Computer Sciences, Yarmouk University, Irbid, Jordan, Saadeh Rania ,   Department of Mathematics, Faculty of Science, Zarqa University, Zarqa 13110, Jordan, Alturki Ryan ,   Department of Software Engineering, Umm Al-Qura University, Makkah, Saudi Arabia
Published: November 2024

At the present time, many virtual systems are being built and these systems need to
be evaluated. The evaluation process is very important because it reveals the
weaknesses and strengths of these systems and the possibility of developing them
later. Evaluating VR systems is also crucial for ensuring their continued
development, improving the user experience, and demonstrating the technology’s
value and impact. This paper reviews the current methods of evaluating VR systems
and suggests a scientific method for evaluating VR systems. In addition, this study
enters a new standard for evaluating an aspect of VR which is rarely mentioned in
VR studies: security. The relationship between VR and security is complex, and
there are many potential risks and challenges to consider. As with any new
technology, it is important for individuals, organizations, and policymakers to
carefully consider the security implications of VR as it becomes more widespread.
Results show that most evaluation methods depend on people’s personal opinions,
which differ from one person to another (user experience). Thus, the proposed
method and current evaluation methods are useful. This report also addresses VR
quality studies, which will enable scientists, designers, and developers to begin
human-centered research and product development
Wingsuit Flying Search Optimization Algorithm Strategy for Combinatorial T-Way Test Suite Generation
Authors:   Advanced Computing, Centre of Excellence (CoE), Universiti Malaysia Perlis, Malaysia, Che Rose[ Nurol Husna , Othman Rozmie Razif , Zakaria Hasneeza Liza ,   Advanced Computing, Centre of Excellence (CoE), Universiti Malaysia Perlis, Malaysia, Zakaria Hasneeza Liza ,   Advanced Computing, Centre of Excellence (CoE), Universiti Malaysia Perlis, Malaysia, Suali Anjila J ,   Advanced Computing, Centre of Excellence (CoE), Universiti Malaysia Perlis, Malaysia, Ahmad ZA ,   Faculty of Electronic Engineering Technology (FTKEN), Universiti Malaysia Perlis, Malaysia
Published: November 2024

Advancement in software development has resulted in complex software
applications that encompass various functional and non-functional
requirements. Such a complex system usually consists of many inputs either
directly from users or from other connected systems or devices. Here, there is
a potential for the system to go wrong due to certain combinations of inputs.
Combinatorial Testing (or T-Way Testing) is effective in tackling the issue.
Numerous studies have proposed strategies in generating T-Way test suite,
and current trend indicates that researchers often incorporate metaheuristic
algorithms in their proposed strategies. Many recent studies employ parameter
optimization algorithms such as (Whale Optimization Algorithm, Particle
Swarm Optimization, Gravitational Optimization Algorithm) in generating an
optimized T-Way test suite. Often, researchers need to tune the parameters
involved in the algorithm before the algorithm can be used for test suite
generation. Since the system under test (SUT) can come in various numbers
of input, it is impossible to find a single best value for every algorithm
parameter. As a result, this paper proposed a T-Way Test suite generator
utilizing Wingsuit Optimization Algorithm (a parameter free optimization
algorithm) for combinatorial test suite generation. The algorithm learnt by
itself as the optimization process progresses and hence eliminates the need for
control parameters. Statistical analysis shows that WFS produces a smaller
test suite compares to most T-Way strategies and in some cases, the difference
between test suite size produce by WFS and other T-Way strategies are
insignificant.
Analysis of the Effect of White Noise on the Halvorsen System of Variable-Order Fractional Derivatives Using a Novel Numerical Method
Authors:   Department of Mathematics, Faculty of Science, Al-Baha University, Al-Baha, Saudi Arabia, Berir Mohammed ,   Department of mathematics, Faculty of Science, Bakht Al-Ruda University, Duwaym, Sudan
Published: November 2024

The Halvorsen System (HS) of Variable-Order (VO) Fractional Derivatives is
a potent instrument for fractional differential equations and chaotic systems due to
the influence of white noise. The study focuses on The Effect of White Noise on the
Halvorsen System of (VO) Fractional Because the Halvorsen System is extensively
utilized in nonlinear optics, fluid dynamics, and plasma physics, the chaos can be
employed to investigate a wide array of relevant physical processes. To analyze the
impact of noise we deduce that noise influences and stabilizes the chaotic Halvorsen
system. We plotted numerous 3D and 2D graphical representations to explain how
the white noise influences the chaotically systems. We applied these schemes to
simulate the chaotic (VO) fractional Halvorsen system
Structure and Distribution of Ichthyofauna in the Irpin River Basin after the Hostilities' Cessation in its Catchment Area
Authors: Prychepa M. V. , Kovalenko Yu. O. , Nezbrytska I. M. , Lietytska O. M. , Zorina-Sakharova K. Ye. , Dubniak S. S. , Ivanova N. O. , Pohorielova M. S. , Shevchenko T. F. , Afanasyev S. O.
Published: November 2024

The paper deals with the inventory of the fish species, their distribution and ichthyofauna in the Irpin River basin after the end of hostilities. During the period of investigations, 36 fish species were recorded. For the first time in the basin we recorded Ballerus ballerus, Aspius aspius and Neogobius melanostomus. In the fish fauna structure, the aboriginal species prevailed. Their contribution to the total numbers accounted for 56.5-98.7%. The complex of rare fishes comprised three species listed in the Red Data Book of Ukraine: Alburnoides rossicus, Leuciscus leuciscus and Carassius carassius, and also five species listed in the Resolution 6 of the Berne Convention: Cobitis taenia, Rhodeus amarus, Misgurnus fossilis, Sabanejewia aurata and Aspius aspius.
The ichthyofauna structure analysis revealed separate groups in the middle, the least transformed part of the basin, and in the lower section of the Irpin River, in the area flooded owing to the dam explosion, where the specific ichthyocenosis was formed comprising new species from the reservoir and elevated portion of the limnophilous fishes. Ichthyofauna in sites located in the territory most affected by hostilities, but outside the flood zone, on the whole corresponded to the general patterns of species distribution and structure typical to natural ichthyocenoses.
Characteristic Analysis of Indonesian Low and Medium Rank Coals and Their Influence on Carbon Dioxide Adsorption Capacity
Authors: Ramdhani Muhammad Rizki , Yan Rizal R  , Sigit Arso Wibisono  , Soleh Basuki Rahmat  , Muhammad Abdurachman Ibrahim  , Eko Budi Cahyono
Published: November 2024

Indonesia has great deep-seated coal potential , such as Lakat coal and Muaraenim coal, which can be utilized as a medium for Carbon Capture and Storage (CCS). These coals vary in characteristic which affects their ability to adsorb or store carbon dioxide gas (CO2). The moisture content of the Lakat coal is less than that of the Muaraenim coal, while the ash content of Lakat coal is 4-5 times higher than the Muaraenim coal. Lakat coal contains more vitrinite content than Muaraenim coal, while Muaraenim coal contains more inertinite content than Lakat coal. The CO2 gas adsorption capacity of Muaraenim coal is 37.62 cc/g which higher than Lakat coal (31.56 cc/g) on dry ash-free basis. The adsorbed CO2 is negatively correlated with vitrinite reflectance, ash content, and moisture content in both coals. The correlation between maceral composition (vitrinite and inertinite content) and adsorbed CO2 content differs between these coals. These analyses will support the CCS/CCUS study in deep seated coal seams by providing the information of CO2 maximum holding capacity in coal and their relationship to its chemical and organic composition.
10K Kişilik Envanteri: Türk Dilinde Kişiliğe Yönelik Sözlük Yaklaşımı Üzerine Bir Ön Çalışma
Authors: Ok Üzeyir
Published: November 2024

Psikolojinin temel amaçlarından biri, insan davranışını anlamak, açıklamak, öngörmek ve kontrol etmektir. Bu amaç doğrultusunda ve özellikle örneğin, işe alımlarda eleman seçerken kişilik özellikleri insan davranışını tanımlayan temel birimlerden biri olarak kabul edilir. Kaygı, Dışadönüklük, Deneyime Açıklık, Geçimlilik ve Sorumluluk olarak adlandırılan 5 ana kişilik özelliğiyle kişilikteki özellikler yaklaşımı, literatürde uluslararası düzeyde yaygın olarak kullanılan ve iyi bilinen bir modeldir. Bu beş özelliğin paralel formları Türkiye ve diğer farklı ülke ve kültürel bağlamlarda geliştirilmiş olmasına rağmen, bu özelliklerin içeriği ve sayısı ekonomik olarak gelişmiş sosyal bağlamlar dışındaki ülkelerde yeterince sorgulanmamış ve tartışılmamıştır. Bu çalışmanın amacı, sözlük yaklaşımının prosedürünü kullanarak, Türkçe sözlük dağarcığında kişilik özelliklerini tanımlamak için kullanılan kelimelerin, içerik açısından beş faktör modelini doğrulayıp doğrulamadığını belirlemek ve ayrıca, bu beş özellik dışında başka özelliklerin olup olmadığını kontrol etmektir. Bu amaç doğrultusunda, nitel analiz yoluyla seçilen ve 352’de karar kılınan kişilik tanımlayıcı kelimelere verilen yanıtlar 1178 katılımcıdan toplanmıştır. Analizlerin sonuçları, beş faktör modelini doğrulamıştır. Ancak buna ek olarak, beş faktör modeli içerisine sıkıştırılması işlevsel ve anlamlı gözükmeyen Merhametsizlik (psychoticism), Hırs-hedonizm (greed & Hedonism), Yumuşak huyluluk (modesty), Varoluşsal bütünlük (existential integration) ve Duygusal yönelim (emotional orientation) şeklinde beş yeni kişilik ana boyutu daha gözlemlenmiştir.
THE EFFECT OF MAGNETIC PARAMETER OVER A VERTICAL WAVY SURFACED RIGHT CIRCULAR CONE IN PRESENCE OF NATURAL CONVECTION
Authors: Adel Rasha
Published: November 2024

The novelty of this study lies in the combination of wavy cone and magnetic field. The interaction between the velocity decrease and the temperature increase has a various applications. This phenomenon has potential applications in fields such as heat transfer, where there is ability to control temperature profiles. Employing magnetic field can be useful in heat exchangers, cooling systems and other thermal processes. The effects of magnetic fields on fluid flow and heat transfer can be relevant in material processing and manufacturing.

This work presents the influence of magnetic field on a vertical wavy cone immersed in viscous fluid, in the presence of natural convection flow with viscosity inversely proportional to linear temperature function. The dominating problem is nonlinear partial differential equations, which is transformed into non-dimensional partial differential equations by using the dimensionless variables, and the wavy surface effect is eliminated from the boundary conditions applying these dimensionless variables. The transformed equations are solved numerically by finite difference (fully implicit method). The numerical results are obtained for magnetic parameter, Prandtl number, surface amplitude, cone half-angle and viscosity variation parameter and their effect on velocity, temperature and Nusselt number.

The effect of increasing the magnetic parameter reduces the velocity and increases the temperature. Redundancy of Prandtl number increases the temperature, while the increase of Cone half-angle (CHA) increases the velocity profile. The influence of increasing the viscosity parameter tends to increase the Nusselt number.
ON THE IMPACT OF COOLING WATER TEMPERATURE ON THERMAL POWER PLANT EFFICIENCY
Authors: Cao Trung Do , Khac Thong Nguyen
Published: November 2024

Currently, climate change is increasingly affecting the thermal power plants. The temperature increase in condenser cooling water significantly reduces the efficiency. The paper presents the performance degradation due to changes in temperature and flow of the cooling water. The data obtained in Quang Ninh Thermal Power Plant (North of Vietnam) has been simulated on Thermalflow software giving highly accurate results. The data is extracted at unit regular operating loads of 240MW, 255MW, 290MW using software input for the simulation. The result shows that, at the load of 240MW, when cooling water temperature increases by 2°C, the efficiency decreases by about 0.13% to 0.19%. At the load of 255MW, the efficiency decreases between 0.04% and 0.46%, and at the load of 290MW, the efficiency decreases between 0.15% and 0.39%.
MULTIMODAL BIOMETRIC ENROLMENT AND AUTHENTICATION SYSTEM (MBEAS) WITH MODIFIED SCORE-LEVEL FUSION AND TRIBLENDNN-BASED TEMPLATE MATCHING
Authors: Almaymuni Abdulgader Zaid , Khan Ahmad Raza , Alkhorem Azan Hamad , Saleh Mohammed A.
Published: November 2024

This article proposed a multimodal biometric enrolment and authentication system (MBEAS) with modified score-level fusion and TriBlendNN-based template matching approach. It consists of four phases: (i) enrolment phase, (ii) security phase, (iii) storage phase, and (iv) authentication phase. Initially, the raw data of the iris, face, hand, speech, signature, handwriting, fingerprint, and keystroking are collected from the BiosecurID database, and then the raw images are pre-processed via resizing and cropping. Raw signal of speech is pre-processed via wavelet denoising and spectral subtraction. The raw data of key stroking is pre-processed via Z-score normalization. Then the pre-processed images of iris, face, signature, hand, handwriting, and fingerprints are segmented via optimized watershed segmentation. The pre-processed speech signal is segmented via VAD. From the segmented data, the optimal features are extracted for iris (LBP), face (IncepV3), signature and handwriting (shape features and GLCM), speech (MFCC), fingerprints (minutiae extraction), hand (palm print features), and keystroking. From the feature-extracted data, the feature fusion is then performed via modified score-level fusion. After the enrolment phase, the feature fused data is secured using watermarking. Then the watermarked data is stored in cloud storage. The final stage is the authentication stage, wherein the template matching is processed via the newly proposed TriBlendNN model. The proposed TriBlendNN model is a combination of the CNN, RNN, and Bi-LSTM. The final outcome comes from template matching. The proposed model is implemented in Python and its accuracy at learning rates of 70% and 80% are 96.89% and 97.76%, respectively.
Why do People Share About Themselves Online? How Self-presentation, Work–home Conflict, and the Work Environment Impact Online Self-disclosure Dimensions
Authors:   Middle Tennessee State University, Totty Stephanie , Kolte Prajakta ,   Southern Illinois University, Edwardsville, Brooks Stoney ,   Middle Tennessee State University
Published: November 2024

Online self-disclosure (OSD) allows people to build and maintain relationships with others, which has become increasingly important as more work has become remote in recent years. Previous research has investigated OSD as a higher-order factor. We propose that the OSD dimensions—amount, depth, honesty, intention, and valence—may be impacted differently by its antecedents. Specifically, we investigate the relationship between two theorized antecedents of OSD—self-presentation and work-home conflict—and the dimensions of OSD. Additionally, we posit that organizational culture factors may affect these relationships. Specifically, we investigate the impacts of segmentation culture and work location flexibility on the relationships between self-presentation and the OSD dimensions. We collected data from 309 active social networking service users. We found that 1) self-presentation positively impacts each of the OSD dimensions, 2) work-home conflict positively impacts OSD amount, and 3) both segmentation culture and work location flexibility moderate the relationship between self-presentation and OSD amount. Implications for theory and practice and future research directions are discussed.
Multiple sclerosis incidence in Al-Madinah Al-Munawwarah in Saudi Arabia before and after the COVID-19 pandemic: a retrospective cross-sectional study
Authors: Jaaoini Yousra H. , Fallatah Raghad A. , Alsuhaymi Rawan S. , Alotaibi Reema N. , Alkuhayli Ghadi T. , Badr Sumayah M. , Mufti Rania E. , Tajuddin Ameen
Published: November 2024

Background: Many people have suffered from coronavirus 2019 (COVID-19) which was declared pandemic in 2020. More than a year ago, vaccination against COVID-19 offered hope of controlling this pandemic. Recent studies have reported that COVID-19 vaccine can boost immune responses, However, it triggers several neurological diseases such as multiple sclerosis (MS). However, there is insufficient data on COVID-19 infections as a risk factor for MS. Therefore, in this study our aim is to assess the incidence rate of MS before and after COVID-19 Pandemic and the associated findings that appeared in MS patients.
Methods: A retrospective cross-sectional study had been conducted using data of patients admitted with COVID-19 infection at King Fahad hospital, Al-Madinah Al-Munawwarah, Saudi Arabia from 2020 to 2024. The collected data had been analyzed using SPSS version 20 using data from medical reports.
Results: The overall number of all MS cases that we have collected were 383, the cases before COVID-19 pandemic were 125 cases while 147 cases were during and after COVID-19 pandemic. The brain and spinal lesions was higher than the cases before COVID-19 also, there was a statistically significant difference between the cases that had ataxia before MS before COVID-19 are lower than after COVID- with statistically significant difference.
Conclusions: The incident of cases increased after COVID-19, the mean age before COVID-19 was higher than the mean age of cases after COVID-19 with statistical significance difference.
Seroprevalence of hepatitis B and vaccine effectiveness in vertical transmission prevention: a hybrid study among pregnant mothers attending antenatal clinics in Abyei, South Sudan
Authors: Matueny Ramzy M. , Owino Alfred O. , Muchiri Joseph , Nyamai Joseph J.
Published: November 2024

Background: Hepatitis B virus (HBV) is a global health threat, affecting millions worldwide and causing severe liver diseases such as cirrhosis and cancer. Low and middle-income countries (LMICs), particularly South Sudan, face challenges like limited healthcare infrastructure and public awareness, leading to high HBV prevalence. Infants born of seropositive women are at heightened risk due to vertical transmission, perpetuating the infection cycle.
Methods: This study assessed HBV seroprevalence among pregnant women in Abyei, South Sudan, and evaluated vaccine effectiveness in preventing mother-to-child transmission. A hybrid study of cross-sectional and cohort design included 384 pregnant women and 94 infants. Blood samples were tested for hepatitis B surface antigen (HBsAg), while socio-demographic data and awareness levels were gathered through structured questionnaires. Qualitative insights were also collected via focus group discussions and interviews with healthcare providers. Logistic regression was used to analyze risk factors.
Results: The seroprevalence of HBV was 19% among pregnant women. Younger age, lower education levels, and unemployment were associated with higher infection rates. Vertical transmission occurred in 4.3% of infants, despite vaccine availability. Awareness of HBV was notably low among participants, underscoring gaps in public health education.
Conclusions: HBV presents a significant health burden in Abyei, South Sudan. Enhancing health education, improving access to preventive strategies, and strengthening healthcare infrastructure are critical to reducing HBV prevalence and transmission. Implementing targeted public health interventions can mitigate the virus’s impact on maternal and child health in the region.
Factors associated with men involvement in child nutrition in health center area of Burundi
Authors: Manirakiza Boniface , Munezero Florence , Harimenshi Deo
Published: November 2024

Background: Men play a central role in decision making regarding women's and children's health, their involvement in child nutrition has been proven to be essential in the prevention of child undernutrition. In Burundi, nutrition interventions have been introduced to strengthen mothers' knowledge on infant feeding, but no interventions are targeting men specifically. The objective of this study was to analyze the factors of men involvement in child nutrition.
Methods: A cross-sectional analytical study was carried out from July 2023 up March 2024 in health centers of Vumbi health district in Burundi. The study population consisted of 231 men with children aged 6-23 months. A questionnaire downloaded in Kobocollect application was used during data collection and the analysis were performed using Stata 15.
Results: The level of men involvement in child nutrition was 53.68% in the area. The men education level (OR=2.54; CI95%: [1.36-4.75]), men participation in nutrition sessions facilitated by the CHWs (OR=3.29; CI95%: [1.82-5.96]), men knowledge in terms of their involvement in child nutrition (OR=2.00; CI95%: [1.12-3.56]), and women accompaniment to health services (OR=2.30; CI95%: [1.18-4.46]) all with p<0.05 were statistically associated with men involvement in child nutrition.
Conclusions: The men involvement in children nutrition for Muramba health center is low, which demonstrates a flaw in child nutrition with the consequent high rate of malnourished children in the locality.
Risk factors of acute heart failure after the first episode of acute coronary syndrome
Authors: Tariq Fatima , Rehman Qavi Ur , Khan Abdullah , Asif Haiqa , Asif Abdul Eizad , Shamsher Muhammad Faisal , Ain Qurat Ul , Munir Ahad , Muneer Fahad , Ahmed Ali , Khan Tayyab Mumtaz
Published: November 2024

Background: Factors that speed up the development of acute heart failure (AHF) after acute coronary syndrome (ACS), are understudied in developing country like Pakistan. Therefore, this study was aimed to determine the risk factor of heart failure (HF) among the post-ACS patients.
Methods: This descriptive cross-sectional study was performed at Benazir Bhutto Hospital (BBH), Rawalpindi, Pakistan. 78 patients who were admitted with HF cardiology unit of BBH after ACS from March 2023 to April 2024 were enrolled in the study. An established inclusion and exclusion criteria along with consecutive sampling technique were used for patients’ recruitment. A self-structured proforma was applied to gather data. Data analysis was done in the statistical package for the social sciences (SPSS) version 25.0.
Results: HF was more prevalent among those post-acute coronary syndrome patients who had an age group with 40 years or above (69.23%), male gender (62.82%), anterior wall myocardial infarction (38.46%), reduced ejection fraction (67.90%), left anterior descending artery pathology (17.95%), absence of myocardial revascularization procedure (46.15%), diabetes mellitus (52.56%), hypertension (78.20%), anemia (53.85%), hyperlipidemia (75.64%), and who had history of smoking (51.28%). A significant number of patients also had chronic kidney disease (23.10%).
Conclusions: Factors such as an age group with 40 years or above, male gender, anterior wall myocardial infarction, reduced ejection fraction, left anterior descending artery pathology, absence of myocardial revascularization procedure, diabetes mellitus, hypertension, anemia, hyperlipidemia, and history of smoking, all accelerate the development of HF among post-ACS patients.
A study on poor sleep hygiene and obesity among different groups of workers in the petroleum industry located in Andhra Pradesh
Authors: Dinesh Reddy Sagam
Published: November 2024

Background: This study explored the relationship between poor sleep hygiene and obesity among workers in the petroleum industry in Andhra Pradesh. Sleep hygiene refers to practices conducive to regular, healthy sleep. Poor sleep hygiene has been linked to health issues, including obesity. Understanding this relationship is crucial for targeted interventions to improve worker health.
Methods: A cross-sectional comparative study was conducted with 193 tank drivers and 90 office workers (female workers excluded due to small sample size). Demographic data, including age, BMI, and average sleep duration, were collected via self-report questionnaires. Statistical tests, including independent t-tests and Mann-Whitney U statistics, were used to assess significance.
Results: A significant association between poor sleep hygiene and obesity was found among petroleum workers. Those reporting shorter sleep duration, irregular sleep schedules, and frequent sleep disturbances were more likely to be obese compared to those with better sleep practices. Shift work and long hours were identified as contributing to poor sleep and increased obesity risk.
Conclusions: Promoting healthy sleep habits is essential to reduce obesity among petroleum workers. Interventions such as sleep hygiene education and workplace policies supporting adequate rest may help mitigate obesity risk. Addressing occupational factors like shift work and long hours is vital for improving overall worker well-being.
Assessment of immunization coverage during COVID-19 pandemic among 12-23 months old children in Sonitpur district under Bihaguri BPHC of Assam
Authors: Banik Souvik , Baruah Rupali , Chakraborty Shashanka Shekhar
Published: November 2024

Background: The longest-lasting decline in childhood vaccination rates in a generation is seen during COVID-19 Pandemic in India. The study aims to analyze the overall scenario of Immunization coverage of 12-23 months children in Sonitpur under sub-centers of Besseria State Dispensary under Bihuguri BPHC during COVID-19 pandemic.
Methods: All the children registered with mother and child protection card in villages under Besseria State Dispensary under Bihuguri BPHC, Sonitpur during COVID-19 pandemic were surveyed for a period of two months from May and June 2021. A simple random sampling method of study includes 84 respondents of children in the age group of 12-23 months.
Results: A total of 84 respondents were surveyed. All the cases include children between the ages of 12 and 23 months. 96.25% babies received BCG at birth. 80% received OPV 0 dose. Hepatitis B was given to 76.25%. 100% of the babies received 3 dosages of OPV at 6, 10, and 14 weeks, only 21 (26.25%) received PCV 1st dose, 24 (30%) received PCV 2nd dose, 23 (28.75%) received PCV booster dose. 65% of the children between 12 and 23 months old received all the vaccinations.
Conclusions: The restriction and the quarantine implemented during the COVID-19 pandemic has hampered the immunization status of the children. The non-availability of vaccines has delayed the immunization status. Comprehensive training and supervision of health workers, increasing awareness regarding immunization sessions, and vaccine preventable disease (VPD) are some of the interventions which could help tackle the issue.
Assessment of household dietary diversity and its associated factors among the households of Amritsar district: a descriptive cross-sectional study
Authors: Aditi  , Padda Preeti , Mahajan Sanjeev , Kaur Jasleen , Arvin
Published: November 2024

Background: Dietary diversity (DD) refers to the range of foods consumed over a specific period, ensuring adequate nutrient intake for optimal health and development. It’s a critical component of a healthy diet and is widely recognized as such. Dietary diversity is a qualitative measure of food consumption, which indicates household access to a variety of foods and is proxy for nutrient adequacy of the individual's diet. It is described as the number of different food or food groups consumed over a given reference period.
Methods: This cross-sectional study was done in rural areas and urban slums of district Amritsar.  A 24-hour recall evaluated the HDDS amongst 300 households equally distributed in rural and urban areas. HDDS consisted of 12 food groups which were marked 0 or 1 depending upon the consumption of various food items in the past 24 hours and the total score was calculated. Data was compiled and analyzed using Epi Info, CDC USA. For nominal, categorical and ordinal data, frequencies and proportions were calculated. For continuous data, mean±standard deviation, median (IQR) were calculated whichever relevant depending upon the distribution of data.
Results: Mean household dietary diversity score in rural areas was a little higher i.e. 8.96 versus urban areas where it was 8.82.
Conclusions: In both rural and urban areas (100%) ate 6 food groups viz. cereals and millets, vegetables, milk and milk products, oil and butter, sugar/honey/jaggery and tea/coffee.
A cross-sectional study on the prevalence of nomophobia and its impacts on quality of life among medical students in Shimoga, Karnataka
Authors: O. P. K. Aseeba , N. Praveen Kumar , M. Chandana
Published: November 2024

Background: Nomophobia refers to discomfort, anxiety, nervousness, or anguish caused by being out of contact with a mobile phone. The highest smartphone penetration was seen among 18–24-year-olds. Recent research indicates that nomophobia is universally present, but the evidence of its effect on the quality of life of potentially vulnerable populations like medical students is less. This study was conducted to estimate the prevalence of nomophobia and to assess its impact on the quality of life of medical students.
Methods: A cross-sectional study was conducted among undergraduate medical students who were selected randomly. Nomophobia and quality of life were assessed using NMP-Q and SF 36 questionnaires, respectively.
Results: The study comprised 250 medical students. Prevalence of nomophobia was as follows- mild (11.2%), moderate (69.6%), and severe (18.8%). There was a negative correlation between nomophobia and the following domains of quality of life- role of limitation due to emotional problems (r=-0.280, p<0.001), energy/fatigue (r=-0.296, p<0.001), pain (r=-0.232, p<0.001), social functioning (r=-0.263, p<0.001) and emotional well-being (r=-0.316, p<0.001).
Conclusions: There is a high prevalence of moderate nomophobia with a negative impact on the multiple physical and emotional domains of the quality of life of medical students.
Accuracy of self-reported height and weight measurements in elderly in Pune: a cross-sectional study
Authors: Shaikh Atiya , Thakar Shweta
Published: November 2024

Background: As age increases the height and weight of the person may change. The perceived height and weight may be different than actual measurements thus, may lead to faulty reporting. Hence, it is important to find the accuracy of self-reported measures. Aim was to compare self-reported and measured height and weight in elderly of Pune region. To do gender-wise comparison of self-reported and measured height and weight in elderly of Pune region. To find influence of age on these measurements by finding correlation between age and difference in self-reported and measured values.
Methods: Self-reported and measured data for height and weight of 465 individuals above 65 years chosen according to set inclusion criteria was gathered and compared using paired t-test.
Results: There was a significant difference in self-reported and measured readings of height and weight in elderly (0.01, <0.0001 for height and weight respectively). Height being over estimated and weight being underestimated. Both genders over estimated height (p=0.0001, <0.0001 for males and females respectively). Females under estimated weight (p=0.2692 for male and <0.0001 for females). As age increases the difference in reporting goes on increasing (Spearman’s correlation coefficient 0.120 and -0.167 for height and weight respectively).
Conclusions: Gender influences reporting of height and weight adversely in elderly. Thus, it is better to take actual measurements of height and weight instead of relying on self-reported values in elderly of Pune region.