bluuebunny/crossref_metadata_2025 huggingface dataset:
Radiation shielding capability and exposure buildup factor of cerium(iv) oxide-reinforced polyester resins
Authors: Aloraini Dalal A. , Almuqrin Aljawhara H. , Kaky Kawa M. , Sayyed M. I. , Elsafi Mohamed
Published: December 2023

The radiation shielding characteristics of the polyester resin composites reinforced with cerium(iv) oxide (CeO2) have been studied. The prepared composites were pure polyester–resin (Poly/CeO2-0), 90% per weight polyester resin and 10% CeO2 (Poly/CeO2-10), (Poly/CeO2-30), (Poly/CeO2-50), and (Poly/CeO2-60). The linear attenuation coefficient (LAC) values for the free polyester and polyester samples with CeO2 were experimentally measured compared with the XCOM data. The experimental LAC value was found to be 0.2377 cm−1 at 0.0595 MeV, which is in good agreement with the calculated value of 0.2454 cm−1. Also, for the same sample, the experimental LAC was found to be 0.1034 cm−1 at 0.662 MeV, showing a good agreement with the calculated value of 0.1057 cm−1. The LAC values for the free polyester, Pol/CeO2-30, and Pol/CeO2-60 are 1.43, 31.82, and 107.77 cm−1 at 0.015 MeV, respectively. The big difference in the LAC values between the composite with 0 and 60% CeO2 is evident. The radiation shielding efficiency (RSE) of the polyester with different amounts of CeO2 was experimentally measured at four energy values. Also, we extended the calculation of RSE at other energy values in the range of 0.015–15 MeV). The exposure buildup factor (EBF) values for the free CeO2 sample and the samples with CeO2 are calculated. The EBF is small at low energies, then increases, and attains a maximum value at moderate energy; the EBF shows a decreasing trend with an increase in the energy.
Assessment of geosites as a basis for geotourism development: A case study of the Toplica District, Serbia
Authors: Ivanović Marko , Lukić Tin , Milentijević Nikola , Bojović Vojkan , Valjarević Aleksandar
Published: December 2023

Toplica district represents an area in Southern Serbia with significant forms of geoheritage that have not been valorized yet. The aim of this pioneering study is to systematically analyze and evaluate all manifestations of the geodiversity in the Toplica district. Based on the geological importance, degree of attractiveness, and size, a total of six geosites were selected. The main goal of the study is to emphasize the insufficient utilization of huge geotourism potentials of the Toplica district and to determine the current geotourism development and geotourism potential of evaluated geosites. The geotourism suitability of each geosite is defined through comparative analysis. The Geosite Assessment Model (GAM) is used to assess the current state of the various elements of geodiversity in the study area. Positioning within the GAM matrix is defined by the values of the investigated parameters. Visualization of the distribution of the GAM indicators is an innovative approach for the interpretation of the obtained results. As a projection of the geotourism potential, the study presents the results of the traffic accessibility of geosites using the Geographic Information System (GIS)-based isochronous method. GIS and Digital Terrain Models are used in the visualization of the research area. The results of GAM apostrophize the current tourist value of Devil’s City, while the isochron analysis of GIS highlights the great geotourism potential of publicly little-known and touristically unaffirmed geosites. The results represent a basis that can support the affirmation of geotourism, the improvement of existing, and the development of new geotourism strategies in the Toplica district.
Earthen Architecture in Nordic Countries: Future Directions
Authors: Lorenzon Marta , Kinzel Moritz , Zoëga Guðný , Dabaieh Marwa
Published: December 2023

Throughout prehistory, earthen architecture has played a pivotal role in establishing a sustainable and easily maintainable built environment, showcasing humanity's capacity to design and construct intricate structures using eco-friendly and cost-effective materials. This special issue underscores the enduring significance of earthen architecture in our historical and contemporary understanding of sustainable building practices.
Computational investigations of different iron oxide–coronene nanoclusters: a DFT study
Authors: Yasir Muhammad , Jamil Nuzhat , Nazir Arif , Ata Sadia , Athir Naveed , Kanwal Qudsia , Nisa Mehr-un , Alzahrani Fatimah M. , Bukhari Attaullah , Kamran Muhammad Z. , Ghafoor Parveen , Iqbal Munawar
Published: December 2023

This study utilizes density functional theory (DFT) to investigate the adsorption of iron oxide clusters on the surface of coronene nanocages. The study explores five different adsorption geometries (P1–P5) using the B3PW91/6-311G (d, p) approach, comparing them to pure coronene. Electronic properties, including energy (hf), HOMO, LUMO, Fermi level, HOMO–LUMO gap, vertical ionization potential, electron affinity, chemical hardness, softness, and chemical potential, were analyzed compared to native coronene nanocages. The calculations revealed strong chemisorption in P1, attributed to significant charge transfer from coronene to the metal atom, resulting in altered positions of HOMOs and LUMOs and a reduced HOMO–LUMO gap (E
gap). Across all geometries (P1–P5), electronic densities in HOMOs were concentrated on iron oxides, while in LUMOs, the electronic cloud was distributed throughout the structure. The diffusion of d-electrons from iron contributed to a more diffuse structure and a lower HOMO–LUMO gap (E
gap), indicating N-type conduction. Global indices demonstrated increased reactivity of iron oxide–adsorbed coronene nanocages compared to native, unbound coronene.
Emocionalno tijelo silovane žene u Domovinskom ratu na primjeru drame Slike Marijine Lydije Scheuermann Hodak
Authors: Alfirević-Franić Jelena
Published: December 2023

Emocionalno tijelo dosadašnji je predmet istraživanja psihologije, medicine i kulturalnih studija. U radu će se istražiti emocionalno tijelo na primjeru moralno-etički i emocionalno kompleksnoga slučaja tekstualno reprezentirane traume silovane žene u Domovinskome ratu u ratnoj monodrami Slike Marijine (1996) Lydije Scheuermann Hodak. Emocionalno tijelo istražit će se pomoću postmodernističkih dramskih strategija kao književnoteorijski emocionološki pojam. Metodološku matricu rada činit će teorija emocionalnoga tijela Martín-Moruno i Pichel (2019). Prema navedenim autorima emocionalno tijelo istražit će se kao rezultat konfiguracije materije u kojoj su emocije pokretačka snaga i rezultat performativnosti. Kao posljedica genocidne politike ili ratnoga silovanja žena u Hrvatskoj 1990. ‒ 1995. godine, Marijino traumatizirano emocionalno tijelo klasificirat će se kao bolno, histerično i političko, s ciljem odupiranja tradicionalnoj maskulinoj diskurzivnoj i društvenoj praksi.
On the concatenated structure of quasi-cyclic codes
Authors: Skersys Gintaras
Published: December 2023

There is not abstract,
Analysis of algorithmic problems solved in Olympiads: stands of students and experts
Authors: Blonskis Jonas , Dagienė Valentina , Plukas Kostas
Published: December 2023

Olympiads (National, Baltic, International) in Informatics are well-known among students. Various algorithmic problems are given to students. The paper deals with the problems from the latest three years. Methods of solving problems are discussed from mathematical and programming perspectives. The main attention is paid to selection, development and application of proper data structures.
Move theorem of the sample range and centre
Authors: Petronaitis Darius
Published: December 2023

The limit distribution functions are obtained for the sample range and sample centre with random indices under nonrandom normalization.
Construction of splines curves and surfaces using MATLAB
Authors: Plukienė Danutė , Plukas Kostas
Published: December 2023

Theoretical and practical aspects of construction splines curves and surfaces with MATLAB are discussed in this paper.
2021 Brazil experiences second major oil spill and ecological disaster
Authors: Eichler Patrícia Pinheiro Beck , Barker Christofer Paul , Vital Helenice , Gomes Moab Praxedes
Published: December 2023

In 2021 oil spill leakage residue and dumped garbage from unknown sources were carried by sea currents and invaded the only oceanic mangrove on an island in the South Atlantic. This tropical biodiverse pristine region of the Archipelago of Fernando de Noronha (PE, Brazil) was acutely affected and suffered chronic impacts that include chemical contamination and economic consequences from this environmental disaster. Here we will show how oil spills and dumped garbage affect the calcareous microorganisms and the ecological chain due to acidification, a known result of low-oxygen environments due to the physical and chemical perturbations of the water and sediment. The diverse biological community of microfossils living in the sediment-water interface tracks the entire marine environment preserved through time. Changes in ocean chemistry can have broad direct and indirect effects on marine organisms and the ecosystems in which they live. Studies indicate that most marine calcifiers (corals, foraminifera, crustaceans, and mollusks) exhibit reduced calcification through increasing ocean acidification. Calcium carbonate (CaCO3) in coral reefs and the shells of other marine calcifiers comes in two different mineral forms: calcite and aragonite. Seawater on the ocean surface near the tropics is supersaturated with the ions needed to form these carbonate minerals. Ocean acidification reduces carbonate ion saturation, making it more difficult for marine organisms to produce the CaCO3 needed to form their shells and structures. This 2021 disaster occurred during the Brazilian government’s extensive environmental mismanagement, and it is of urgent necessity to spotlight this tragedy affecting this unique and sensitive habitat showing the ongoing damaging effects that include biological-socio-economic losses not yet sufficiently addressed. Interrelated communities may continue to absorb these deleterious impacts for decades without consideration or compensation.
Evaluation of the RP-LC method for determining the pKa of abiraterone and its assay
Authors: Şanlı Senem , Şahin Meryem Cansu , Özdemir Ayşe , Paşa Buket
Published: December 2023

A straightforward, dependable, and quick RP-LC method for the analysis of abiraterone acetate in its dose form and human urine has been devised. With DAD detection, sensitivity was reported to be high. The LOD and LOQ of the procedure were deemed adequate. The suggested approach was exhaustively validated in accordance with ICH requirements, and the findings demonstrated that it was exact, accurate, selective, and sensitive for the analysis of this pharmaceutical. The chromatographic separation was realized using a X-Terra RP-18 (150 × 4.60 mm i.d. × 5 μm) column and a UV detector set at 255 and 267 nm. In addition, pKa values were calculated based on the relationship between the retention factor and the pH of the mobile phase. The influence of the composition of the mobile phase on the ionization constant was investigated by measuring the pKa at various acetonitrile–water combinations ranging from 50 to 70% (v/v).
Identifikasi dan uji efektivitas rizobakteri dalam meningkatkan hasil tanaman kacang tanah
Authors: Khalimi Khamdan , Leana Wayan Anik
Published: December 2023

In order to increase groundnut productivity, it is necessary to find agents that can  improve  the  growth  and  yield  of it.  This  study  was  done  to determine the potential use of rhizobacteria to promote the growth and increase the yield of groundnut under green house experiment. The research was conducted in the plant disease laboratory, Faculty of Agriculture, Udayana University, in June 2022-January 2023. Five isolates of rhizobacteria namely FN1, FN2, FL3, FL4, and FL5 were tested for their effectiveness in promoting the growth, increase the yield, and protein content of groundnut. Molecular identification based on 16S rRNA gene sequence showed that FN1 and FL5 were similar to Klebsiella pneumonia with the similarity level at 98%. FN2 was similar to Klebsiella variicola with 99% similarity, FL3 was similar to Proteus mirabilis with 100% similarity, and FL4 wassimilar to Providencia rettgeri with 99% similarity. Rhizobacteria treatments significantly improved the groundnut growth, in which plant height, dry weight of shoot, dry weight of root, chlorophyll content, and the number of nodule significantly (p<0.05) higher compared to control. Yield component such the number of pod per plant, weight of pod per plant, water content and protein content in the seed of treated plants were significantly higher than control. These rhizobacteria may be further developed as plant growth promoting agents to increase the yield  and protein content of groundnut.ABSTRAK Pemanfaatan mikroba yang bisa meningkatkan pertumbuhan dan hasil kacang tanah sangat penting untuk meningkatkan produksi. Penelitian ini menguji tentang potenis rizobakteri untuk meningkatkan pertumbuhan dan hasil kacang tanah yang dibudidayakan pada greenhouse. Penelitian dilakukan di lab penyakit tumbuhan, fakultas pertanian universitas udayana, pada bulan Juni 2022-januari 2023.  Lima isolat rizobakteri: FN1, FN2, FL3, FL4, dan FL5 telah diujikan untuk mengetahui kemampuan dalam meningkatkan pertumbuhan, hasil serta kandungan protein kacang tanah. Analisis molekuler berbasis 16S rRNA menunjukkan isolat FNI dan FL5 memiliki 98% kemiripan dengan Klebsiella pneumonia. Isolat FN2 memiliki 99% kemiripan dengan Klebsiella variicola, isolat FL3 mirip dengan Proteus mirabilis pada tingkat 100%, dan isolat FL4 memiliki 99% kemiripan dengan Providencia rettgeri. Perlakuan dengan isolat rizobakteri menunjukkan hasil yang signifikan (p<0.05) pada pertumbuhan kacang tanah seperti tinggi tanaman, berat kering brangkas, berat kering akar, kandungan klorofil daun dan jumlah bintil akar dibandingkan dengan kontrol. Jumlah polong, berat polong per tanaman, kadar air dan kandungan protein pada tanaman juga menunjukkan hasil yang lebih tinggi dibanding kontrol. Hal ini menunjukkan rizobakteri potensial dikembangkan untuk meningkatkan pertumbuhan, hasil dan kandungan protein kacang tanah.
Pengaruh aplikasi bio-invigorasi dan lamanya perendaman benih kedaluwarsa pada pertumbuhan dan hasil cabai rawit (Capsicum frutescens L.)
Authors: Zarah Anisa Umu , Anwar Syaiful , Rosyida Rosyida
Published: December 2023

The increasing chili consumption in Indonesia requires efforts to maintain and even improve seed quality. Efforts to maintain the quality of expired seeds can be applied through bio-invigoration and soaking of chili seeds. The research was done on March 26–September 30 2022 at Banyumas Plant Pest and Disease Laboratory, and screen house on Jl. Kramasari Bojong, Kawunganten, Cilacap, Central Java, 4x4 Factorial Completely Randomized Design, 48 experimental units. The first factor was bio-invigoration, B0=without bioinvigoration, B1=30% coconut water+B. subtilis and P. fluorescens, B2=24% shallot  extract+B. subtilisand P.fluorescens, and B3=24% bean sprout extract+B. subtilis and P. fluorescens. The second factor was soaking  time,  P0 = 0 hours, P1 = 24 hours, P2 = 48 hours, P3 = 72 hours. Parameters were seed germination (%), seed growth uniformity (%), vigor index, plant height (cm), number of leaves (strands), and fruit fresh weight (g). The results showed that seed quality parameters and plant height were better at 24 hours of immersion with all bioinvigoration. Still, the number of leaves and fruit fresh weight were effective at 24 hours of immersion with 30% coconut water+B. subtilis and P. fluorescens.ABSTRAKUpaya untuk mempertahankan bahkan meningkat kualitas benih cabai rawit perlu dilakukan karena peningkatan konsumsi di Indonesia. Upaya mempertahankan kualitas benih kedaluwarsa dapat dilakukan dengan pemberian bio-invigorasi dan perendaman pada benih cabai rawit. Penelitian dilaksanakan pada 26 Maret–30 September 2022 di Laboratorium Hama dan Penyakit Tanaman Banyumas, dan screen house di Jl. Kramasari Bojong, Kawunganten, Cilacap, Jawa Tengah, dengan Rancangan Acak Lengkap (RAL) Faktorial 4x4, 3 kali ulangan dengan 48 unit percobaan. Faktor pertama adalah bio-invigorasi: B0=Tanpa bio-invigorasi, B1=30% air kelapa+B. subtilis dan P. fluorescens, B2=24% ekstrak bawang merah+B. subtilis dan P. fluorescens, dan B3=24% ekstrak tauge+B. subtilis dan P. fluorescens. Faktor kedua lama perendaman, P0=0 jam, P1=24 jam, P2=48 jam, P3=72 jam. Parameter yang diamati meliputi daya berkecambah benih (%), keserampakan tumbuh benih (%), indeks vigor, tinggi tanaman (cm), jumlah daun (helai) dan bobot segar buah (g). Hasil penelitian menunjukkan parameter kualitas benih dan tinggi tanaman efektif pada lama perendaman 24 jam dengan semua bahan bio-invigorasi, namun parameter jumlah daun dan bobot segar buah efektif pada perendaman 24 jam dengan 30% air kelapa+B. subtilis dan P. fluorescens.
Analisis pertumbuhan dan hasil varietas bawang merah dengan pupuk hayati di luar musim tanam
Authors: Marhama Hasna , Triharyanto Eddy , Budiastuti Maria Theresia Sri
Published: December 2023

The phenomenon of climate change has an impact on agricultural sector, including the cultivation of shallots. To meet the needs of the community, an approach is taken through the application of biofertilizers and the use of shallot varieties that are resistant to off-season cultivation. The research aimed to determine the optimal concentration of biofertilizer and the resilient shallot varieties for the off-season cultivation. This research was conducted in February–May 2023 in Ngringo Village, Jaten District, Karanganyar, Central Java, with an altitude of 189 masl. This study used a Split Plot Design method. Shallot Variety was the main plot, namely: Bima Brebes, Maja Cipanas, and Bali Karet. Biofertilizer concentration was the subplots, i.e : 0, 3, 6, 9, 12 ml l-1 per plot, resulting in 15 treatment combinations with three replications. Observation parameters included leaf area index, net assimilation rate, plant growth rate, bulb diameter, and bulb fresh weight. The results indicated that biofertilizers did not affect the growth of shallots. Regarding yield quality, a concentration of 12 ml l-1 per plot could increase bulb diameter and bulb fresh weight. The Bali Karet variety generated better bulb diameter and bulb fresh weight, and it is capable of adapting when planted off-season.ABSTRAKFenomena perubahan iklim berpengaruh pada sektor pertanian, termasuk budidaya bawang merah. Untuk memenuhi kebutuhan masyarakat, dilakukan pendekatan dengan pemberian pupuk hayati dan penggunaan varietas bawang merah yang tahan ditanam di luar musim. Tujuan penelitian yaitu mengetahui konsentrasi optimal dari pupuk hayati dan varietas bawang merah yang tahan ditanam di luar musim. Penelitian dilaksanakan pada Bulan Februari-Mei 2023 di Desa Ngringo, Kecamatan Jaten, Karanganyar, Jawa Tengah dengan ketinggian wilayah 189 mdpl. Penelitian ini menggunakan metode Rancangan Acak Kelompok Petak Terbagi (Split Plot Design). Varietas bawang merah menjadi petak utama yaitu: Bima Brebes, Maja Cipanas, dan Bali Karet. Konsentrasi pupuk hayati sebagai anak petak, yaitu: 0, 3, 6, 9, dan 12 ml l-1 per petak, sehingga terdapat 15 petak kombinasi perlakuan yang diulang tiga kali. Parameter pengamatan meliputi indeks luas daun, laju asimilasi bersih, laju pertumbuhan tanaman, diameter umbi, dan bobot segar umbi. Hasil penelitian menunjukan pupuk hayati tidak berpengaruh terhadap pertumbuhan bawang merah. Pada kualitas hasil, konsentrasi 12 ml l-1 per petak dapat meningkatkan diameter umbi dan bobot segar umbi. Varietas Bali Karet memiliki diameter umbi dan bobot segar umbi terbesar, serta mampu beradaptasi ketika ditanam di luar musim tanam.
Research on the Bridge in Jestřebí, Česká Lípa District, Czech Republic
Authors: Martyčák Stanislav
Published: December 2023

The aim of this article is to present to the reader with the results of the watching brief of the defunct historical bridge in Jestřebí, Česká Lípa district. The research brought new knowledge about the construction technology and dating of the bridge. The new findings are then placed in context with the information gathered to date about other bridges in the Česká Lípa region in North Bohemia.
Ceramic “Imports” and Imitation of the Culture of Tiszapolgár and Bodrogkeresztúr at the Sites of Trypillia–Cucuteni Culture
Authors: Tkačuk Taras
Published: December 2023

The article examines the influence of the Tiszapolgár and Bodrogkeresztúr ceramic traditions on the ceramics of the Trypillia–Cucuteni culture. The dynamics of these influences are monitored in the paper, where it was found that there were not many “imports” from the Tiszapolgár culture and their influence on the formation of ceramic complexes of the Trypillia–Cucuteni culture was not significant. The impact of the Bodrogkeresztúr culture on the ceramic complexes of the Šipincì local group of the Trypillia culture was somewhat greater.
Development of a thermodynamic model for optimization of processes in crop production
Authors: Mamyrbayev Orken , Wojcik Waldemar , Titova Nataliia , Pavlov Sergii , Oralbekova Dina , Aitkazina Assel , Zhumazhan Nurdaulet
Published: December 2023

The agricultural sector faces serious challenges related to climate change. These changes have the potential to reduce yields and food security, highlighting the importance of understanding and managing temperature dynamics. This work is the result of development a thermodynamic model that investigates the dynamics of temperature balance through heat energy transfer. A scheme of rheological heat exchange of an object with an insulated surface and graphs of irreversible rheological transformations are proposed. The main equation of heat exchange with a chemical reaction is given and the equation of the speed of heat energy transfer along the length of the object is derived. Further development of physical-mathematical models of the transformation of thermal energy into a set of states of the object is proposed. The experimental results fully correlate with the heat transfer equation. Samples with tomato seeds were irradiated with a photon irradiator with wavelengths of blue 450 nm, green 550 nm, red 650 nm with an exposure of 12/24 h. As a result, 90 % under the influence of the red spectrum of the photon irradiator for 24 h, which is 24 % more than the control sample. This will make it possible to assess the general temperature regime of agricultural objects and optimize the heating process. This study reveals the essence of temperature regulation at agricultural facilities using a thermodynamic model, which not only takes into account heat exchange, but also includes the influence of chemical reactions. The proposed thermodynamic model and associated equations provide a foundation for future research and practical applications that will ultimately benefit the agricultural industry, global food production
Development of a social-oriented inclusive business model for strategic enterprise renewal
Authors: Kramarenko Anna , Kvitka Anton
Published: December 2023

Research object is a business model of enterprises’ strategic renewal in the areas of economy, environmental friendliness, and sociality. Key problem: the need to develop a business model for strategic renewal of enterprises, maximally adapted to the current challenges of the market and society. Based on the prerequisites for the evolution of traditional corporate strategies to a stakeholder approach, a business model for strategic enterprise renewal has been formed. The relative nature of companies’ business activity, transformation of analysis methods and approaches to decision-making, as well as key elements, vectors, and results of interaction within the developed business model are determined and justified. The possibilities of practical application of a social-oriented inclusive business model in the implementation of business analysis are shown. Interpretation of the research results: the social-oriented business model of enterprises’ strategic renewal is developed on the basis of systematization of the relative approach, theories of stakeholders and corporate philanthropy, the concept of "charitable corporation" and orientation to socially inclusive value instead of traditional shareholder value. Along with the traditional economic aspect of the business model, the environmental and social aspects are outlined. To adapt business models of enterprises to modern challenges, it is proposed to increase the use of qualitative analysis parameters in the implementation of strategic decisions, as well as to design the development of relations with key stakeholders. Practical significance: Certain parameters of the business model can be used by enterprises to conduct a critical analysis of their own business strategies and develop effective measures to adapt them to modern challenges
Biomechanical properties of derma materials for hernioplasty
Authors:   Kuban State Medical University, Melkonyan Karina , Rusinova Tatyana ,   St. Petersburg State University of Industrial Technologies and Design, Kozmai Yana ,   Moscow State University of Medicine and Dentistry named after A.I. Evdokimov of the Ministry of Health of Russia, Solop Elizabeth , Moskalyuk Olga , Asyakina Alevtina , Manukyan Mary , Gurevich Konstantin
Published: December 2023

The most common problem in the surgical treatment of hernias using tension herni-oplasty is a strong tension in the suture area, which can lead to wound dehiscence, de-formation of the hernia area, fistulas and recurrence. Therefore, at present, the technique of tension-free hernioplasty using both synthetic and natural materials is increasingly being used. Natural materials are more reliable due to biocompatibility, lack of cytotoxicity and minimal biodegradation. However, not all biomaterials have the necessary mechani-cal characteristics, such as elasticity and strength. The main goal of this study was a comparative assessment of the biomechanical properties of the acellular dermal matrix, bioplastic material obtained by the methods of detergent-enzymatic and chemical decellu-larization, respectively, and the surgical implant Permacol™. All materials were subjected to histological analysis and quantitative DNA analysis. Strength studies (stress, strain at break and initial modulus of elasticity) were carried out using an Instron 1122 universal tensile testing machine. BIoplastic material showed significantly lower values of defor-mation-strength properties and modulus of elasticity. The obtained results showed that the acellular dermal matrix and the commercial Permacol™ implant are the closest to the native dermis in strength characteristics, however, the histological structure of the acellu-lar dermal matrix is closest to the histological features of the organization of the porcine dermis, which makes this material promising for further research.
Prediction and classification of groundwater quality index (WQI) using regression learning models
Authors:   Karunya Institute of Technology and Sciences, Mary Anitha , Johnson Irutayasami ,   Tamil Nadu Agricultural University, Subramaniam Kamalraj , Karthikeyan Mahamuni ,   Karpagam Academy of Higher Education, Roshan Roshan
Published: December 2023

Groundwater has developed into a vital natural resource as a result of its significant use in home applications, particularly for drinking, as well as in the agricultural and in-dustrial sectors. The quality and quantity of groundwater have varied greatly across time and space. Water quality index (WQI) which depends on many parameters, remains a critical indicator of the quality of water, which leads to effective water management. The administrators will be benefitted if an automatic system for predicting water quality exists. The primary aim of this study is to design a model to predict the groundwater quality in different districts of Tamil Nadu, India, using machine learning techniques. The available data constitutes the physical and chemical characteristics of groundwater such as pH, electrical conductivity, water hardness, along with its suitability for irrigation and drinking purposes. In this study, many machine learning algorithms were implemented, and the results were compared.
A comparison between long term outcomes of surgical and orthotic management of scoliosis in adolescents
Authors:   Rehabilitation Sciences Research Center, Karimi Mohammad Taghi , Kavyani Mahsa ,   Musculoskeletal Research Center
Published: December 2023

Orthotic and surgical management are the main approaches used to control scoliot-ic curve progression. Treatment options are selected based on the age of the patient and severity of scoliotic curve. Although previous studies have investigated the consequenc-es of different treatment options in patients with idiopathic scoliosis, it is still not clear which approach (conservative or surgical) has more influence on controlling curve pro-gression. The aim of this study was to compare the final results of scoliotic treatment using each approach. A search was conducted using appropriate key words in identified data bases including PubMed; ISI web of knowledge; Google scholar; Ebsco and Em-base. Data extraction was done using PICO (population, intervention, comparison and outcomes). Finally, the ‘Down and Black’ tool was used to assess the quality of selected studies. The initial search strategy yielded fifty studies. 9 studies were included for final analysis in this review. Studies were categorized as those which reported the number of scoliotic subjects treated with an orthosis who also had surgery and studies comparing outcomes of treatment modalities (surgery and conservative treatment (orthosis)). Re-sults of this review indicated that orthotic treatment can control the rate of surgery in sco-liotic subjects. Literature comparing between orthotic and surgical management focused mostly on specific parameters such as quality of life; well-being and pulmonary function. These parameters, demonstrated no significant difference between scoliotic subjects treated with surgery and bracing.
Experimental study of the distribution of elasticity in the peri-implant bone during prosthetics
Authors:   Pavlov First Saint Petersburg State Medical University, Trezubov Vladimir , Mishnev Maxim ,   Yaroslav-the-Wise Novgorod State University, Parshin Yuri , Modestov Victor ,   Peter the Great Saint Petersburg Polytechnic University, Yarekha Denis
Published: December 2023

The world continues to study the biomechanics of implant dentures and their artifi-cial supports. At the same time, different attitudes to the inclined position of distal im-plants in the bone and their bilateral (mesial and distal) loading were noted. The lack of a unified view of the problem under consideration set us the goal to study in the experi-ment the distribution of stresses in the peri-implant bone in vertical (sheer) and inclined implants with the absence or presence of a distally located prosthesis body of various lengths with one-sided support on these artificial supports. For the experiment, we used mathematical modeling by the finite element method. It was used to study the distribution and magnitude of elastic stresses in the peri-implant bone. As a geometric model, a model of the upper jaw with an implant prosthesis installed on it, based on 4 implants, was used. It should be noted that the increase in stress in the material of the prosthesis and compact bone was not critical and was much less than the ultimate strength of these media when the distal implant was tilted with the presence of a dorsal body with one-sided support on the distal implant. As for the spongy bone, the stresses in it showed no dependence on the position of the implant as a whole and slightly increased with an increase in the mesiodistal length of the dorsal body of the prosthesis with one-sided support. Thus, mathematical modeling by the finite element method showed the uncritical distribution of elastic stresses in the prosthesis, distal im-plant, compact and cancellous bone
Experimental and numerical study of flow structure in a model of distal anastomosis of femoral artery
Authors:   Federal Research Center “Kazan Scientific Center of RAS”, Molochnikov Valeriy , Khubulava Gennadiy ,   Pavlov First Saint Petersburg State Medical University, Kalinin Evgeniy ,   Kazan Federal University, Pashkova Natalya , Nikiforov Ilya
Published: December 2023

Physical and numerical simulation of the steady blood flow was carried out focusing on the distal end-to-side anastomosis of a graft to the femoral artery. The angle between the graft and the artery was 60°. Two Reynolds numbers were considered that corresponded to the physiological range when estimated using the average (Re = 240) and maximum (Re = 1640) blood flow through the human femoral artery over a single cardiac cycle. The experiment included flow visualization and measurements of instantaneous vector fields of velocity using an optical SIV (Smoke Image Velocimetry) technique. Direct numerical simulation (DNS) was employed for numerical study. The distribution of blood flows through the branches of the main artery was 80 % in the antegrade and 20 % in the retrograde direction. Main patterns in the distribution of velocity and its root-mean-square fluctuations in both branches of the main artery were revealed. Flow separation regions were observed in the branching area. Additionally, secondary flows (Prandtl’s vortices of the first kind) were revealed. The flow in the branching area was still laminar Re = 240, while the signs of transition to turbulence were documented within separation regions at Re = 1640. Distributions of streamwise and circumferential components of skin friction vector were estimated. In some regions of flow, these components were shown to be comparable in size. The location of regions was revealed in which the friction magnitude in the considered flow regimes was lower than the one in an unimpaired artery (developed laminar flow in a circular pipe) at appropriate Reynolds numbers.
Identification of the model parameters in cornea with keratoconus in terms of the numerical-experimental study of corneal geometry and mechanical behavior
Authors:   Volgograd’s National Medical Research Center “Eye Microsurgery” named after S.N. Fedorov, Solodkova Elena , Malyugin Boris ,   National Medical Research Center “Eye Microsurgery” named after S.N. Fedorov, Zakharov Igor ,   Volgograd State Technical University, Le Van Hoang , Fokin Victor , Balalin Sergey , Lobanov Evgeny
Published: December 2023

The aim of this work is to derive a computational technique for model parameter es-timation of corneal mechanical behavior basing upon the following input clinical bi-omarkers: the real-time amplitude of corneal deformations, measured in course of non-contact pneumotonometry, intraocular pressure and geometric features of the patient’s cornea, revealed during his tomographic examination. The developed technique of corneal properties prediction within the area of kerato-conus and beyond it, is based upon the data resulting from finite element modeling of a non-contact tonometric test, and upon the procedure of multi-parameter optimization (minimization) of the deviation of the calculated results from the amplitude of corneal deformation measured by means of pneumotonometer Corvis ST. The simulation is based on the results of a survey of 78 patients of a real clinical database, taking into account the geometry of the cornea, the size and position of the keratoconus zone, the intraocular pressure, and the deformation parameters of the material during the pneumotest, which are specific for each patient.
Elastic linear, bilinear, nonlinear exponential and hyperelastic skin models
Authors:   Evdokimov Moscow State University of Medicine and Dentistry, Muslov Sergey , Pertsov Sergey ,   Anokhin Research Institute of Normal Physiology, Chijmakov Evgeniy ,   Perm State Medical University named after Academician E.A. Wagner, Astashina Nataliia ,   Perm National Research Polytechnic University, Nikitin Vladislav , Arutyunov Sergey
Published: December 2023

Linear, bilinear, exponential and hyperelastic models of human back skin are ana-lyzed. The results showed that the elastic properties of tissues depend on its location and are best described by exponential functions σ = a·(exp(b·ε) – 1), where a and b are material constants that depend on the localization and orientation of the samples along relation to the Langer lines. The parameters of elastic differential moduli E(ε) of tissues (minimum, average and maximum values) are determined. The differential modulus of elasticity is incremental (increasing with strain from 8.57 to 154.44 MPa), and the regres-sion equation has the form E = a·b·exp(b·ε) (r = 0.998) and very accurately characterizes its elastic behavior. The Young's modulus of samples parallel to the Langer lines is higher than in the oblique (45º) and transverse directions, and in the middle part of the back is higher than in the upper and lower parts (Eav(ε) = 56.59, 35.76, 21.74 MPa, respectively), the elastic anisotropy coefficient is 3.49. Linear (r = 0.965) and bilinear (r = 0.967) elastic models are considered, and the numerical values of the model parameters are determined. To study the hyperelastic properties of the skin, neo-Hooke, Mooney-Rivlin, Ogden, polynomial and Veronda–Westmann (V–W) phenomenological models were used. The calculations were carried out using the Mathcad 13.0 computer algebra system and the ANSYS 2022 R2 multipurpose software package. The parameters of the models and the closeness of the correlation between experimental and calculated data are determined. The correlation coefficient was used as a criterion for the correspondence between mod-els and real properties of tissues. The polynomial model (r = 0.9997) and the Veronda–Westmann model (r = 0.999) demonstrated the highest correlation with the experimental values, the Ogden model (r = 0.891) and the neo-Hookean one (r = 0.935) demonstrated the lowest correlation with the experimental values. The values of Young's moduli and other elastic and hyperelastic characteristics of tissues were compared to study the factors influencing the mechanical behavior of human back skin.
Education of Children with a Refugee Background in Poland in the Situation of War in Ukraine. Outline of the Problems
Authors:   University of Maria Curie-Skłodowska, Kruk Marzena
Published: December 2023

In the context of the military conflict in Ukraine, since February 24, 2022, the Polish government has decided to include refugee children in the continuation and implementation of education in the Polish education system at various stages and levels of education. Educational institutions in Poland have faced the great challenge of accepting refugee children into the Polish education system. Due to the war situation, both children with a refugee background and their guardians (mothers), as well as teachers, were confronted with the reality that showed many aspects of education and the implementation of the didactic process in a situation hitherto unknown and unexpected. The article aims to provide a preliminary diagnosis of the education process of children with a refugee background from the perspective of teachers and institutional support. In addition, the analysis also attempted to assess the health and mental well-being of children with experience of war trauma. Critical reflection on the education process of refugee children in Poland is based on available reports and studies of quantitative and qualitative research carried out primarily by public institutions (Polish Ministry of Education and Science, UNHCR, Integrated Educational Platform) and the private sector (Centre for Citizenship Education 2022–2023).
Children’s Well-Being as the Cornerstone of a Child-Centred Asylum Policy: The (In)visibility of Underage Asylum-Seeker Needs in Poland
Authors:   Jagiellonian University, Kościółek Jakub
Published: December 2023

The focus on children’s well-being is fundamental to any child-centred policy. Hence, migrating children’s interests are usually considered in a migrant context rather than in the best interests of the child, highlighting the challenges of implementing child-centred asylum policies in practice. Based on this observation, the paper focuses on the discrepancies between the legal provisions for the reception of minor asylum seekers in Poland and practice on the ground: how they serve the education opportunities for such children, as the only social area where the child-centred approach is detectable. The paper discusses the extent to which the legal provisions of the Polish migration law are suitable for adopting a child-centred approach in the asylum procedure to enable children to continue their education. It is further explored in connection to the Micreate fieldwork study with asylum-seeking children. The paper analyses specific institutions to assess their potential for implementing child-centred management in the reception and integration of asylum seekers and to highlight the obstacles in this direction. Finally, the paper formulates recommendations for necessary changes and shifts in practice to recognise the children-friendly practices in asylum procedures.
Spray-on polymer waterproofing finishing structure for bridge structures, taking into account thermophysical modeling
Authors: Kamenskikh Alexander
Published: December 2023

This article investigates the issues related to the spray-on polymer waterproofing finishing structure of bridge structures at low temperatures, with a focus on thermophysical modeling and macroroughness normalization.

Through patent research and a comparative analysis of polymeric materials for waterproofing bridge structures, the chosen object of study is the domestically manufactured polymeric material (three-layer structure) called
«Hydroflex-1», along with its close analogues that exhibit adhesion to concrete and metal, homogeneous strength properties, suitable operating temperature range, fewer structural layers, and the longest proven service life.

The author presents the process and results of computational modeling regarding the thermophysical interaction between the distribution of a flat flame of the waterproofing hot mixture and a treated surface.

The results of mathematical thermophysical modeling are validated through the visualization of the temperature field of the sprayed hot waterproofing layer using a thermal imager. The calculation error deviates by no more than 5°C from the results of full-scale measurements.

The formation of point caving occurs on the slopes of areas with maximum irregularities, which is influenced by the temperature and flow rate of the sprayed mixture, cooling time, as well as the angle and height of the macroroughness ledge.

The technology for the spray-on structure of a three-layer polymeric waterproofing finishing for steel-reinforced concrete and metal orthotropic slabs of bridge structures during repair at low temperatures below 10°C has been improved. This improvement aims to extend the construction season by considering thermophysical modeling and normalizing geometric and statistical parameters of macroroughness. Additionally, the results of ranking the dominant factors influencing the thermophysical interaction are taken into account.
Программное обеспечение. Часть 1
Authors: Жигалова Ольга , Сепик Тина
Published: December 2023

Учебно-методическое пособие для организации занятий со студентами очной и заочной форм обучения по направлению подготовки 44.03.05 и 44.03.01 «Педагогическое образование», профилей «Физика и информатика», «Математика и информатика», «Информационные технологии и математика» в рамках дисциплины «Программное обеспечение». Пособие может быть использовано студентами при подготовке к занятиям по дисциплине, при выполнении лабораторных работ.
Title IX Offices at Top United States Universities with Medical Centers: Staffing, Investigations and Transparency
Authors:   Department of Psychiatry and Behavioral Sciences, School of Medicine, UCSF Weill Institute for Neurosciences, University of California, San Francisco (UCSF),  San Francisco, CA 94110, USA, Folk Johanna B. , Carter Sarah P. ,   Department of Medical and Clinical Psychology, Uniformed Services University of the Health Sciences, Rockville, MD 20814, USA, Jagsi Reshma ,   Department of Radiation Oncology, Emory University School of Medicine and Winship Cancer Institute, Atlanta, GA 30322, USA, Mangurian Christina ,   Department of Psychiatry and Behavioral Sciences, School of Medicine, UCSF Weill Institute for Neurosciences, University of California, San Francisco (UCSF),  San Francisco, CA 94110, USA and Department of Epidemiology and Biostatistics, University of California, San Francisco (UCSF), San Francisco, CA 94158, USA
Published: December 2023

Background Sexual harassment pervades higher education and disproportionately impacts women in medicine. The Department of Education’s guidance related to Title IX, a federal civil rights law intended to protect against discrimination based on sex in educational programs or activities receiving federal financial assistance, was revised in 2020 to narrow the definition of sexual harassment and disallow a single investigator model. This added to the required tasks of already overburdened and under-resourced Title IX offices. Methods The current report documents characteristics of Title IX offices at leading universities with medical schools in the 2020-2021 academic year. Results Findings highlight a low number of staff managing sexual harassment complaints, with an average ratio of 2.99 staff per 10,000 people at the university. A small percentage of complaints were formally investigated, with only 4% at public universities and 11% at private universities. Findings also suggest a lack of transparency regarding the actual length of investigations, which was reported in only 20% of public reports. Conclusion Given the importance of trust that sexual harassment complaints will be handled in a timely and transparent manner, we suggest potential opportunities for universities to consider.
Towards an AI-Enhanced sustainable health system: inferences from healthcare management research
Authors: DURMUŞ ŞENYAPAR Hafize Nurgül
Published: December 2023

Health management literature is critical in facilitating effective leadership and management in the health sector by imparting the knowledge and understanding required in health service planning, organization, coordination, and management. Through an exhaustive bibliometric examination, the current state of the “healthcare management” literature was assessed in this study, illuminating potential future developments in the field. By utilizing an extensive compilation of articles from the Web of Science (WoS) database, this study endeavors to scrutinize patterns in scientific inquiry, assess advancements made on subjects, and underscore significant fields of cooperation and scholarly input. An in-depth, extensive analysis revealed that three decades of research yielded over 46,000 publications; the number of publications has increased by six, particularly in the last ten years, and the United States and the United Kingdom produced most of the publications. Analysis identifying influential journals and authors in the field revealed that it is the focus of attention of health professionals, especially nurses. Although the COVID-19 pandemic has been recognized as the primary public health concern, scholarly attention has shifted towards a sustainable health system incorporating technology-supported preventive health practices and intelligence. To thoroughly comprehend the theoretical progression of health management research, its capacity to tackle worldwide issues, and its growth potential, the study’s findings are a valuable scholarly resource that offers practitioners, policymakers, and researchers a comprehensive overview.