bluuebunny/crossref_metadata_2025 huggingface dataset:
Development of Vertical Farming Systems from Waste Polymers Using Additive Manufacturing Techniques
Authors: Ezhilarasu Sunilkarthik , Bañón Carlos , Silva Arlindo
Published: October 2024

Driven by population growth, rising living costs, and the urgent need to address climate change, sustainable food production and circular economy principles are becoming increasingly important. Conventional agriculture faces significant challenges, including land scarcity, water shortages, and disrupted supply chains. As a solution, cities are adopting vertical farming to enhance urban food security and promote circularity. This research introduces FLOAT (Farming Lab on a Trough), an innovative vertical farming system made from bio-polymers and recycled polyethylene terephthalate glyco (rPETG) pellets from plastic bottles. FLOAT’s design emphasizes sustainability and closed-loop material usage. The study showcases the versatility of additive manufacturing (AM) in creating complex geometries with fully functional 1:1 prototypes. These prototypes highlight FLOAT’s potential as a scalable and adaptable solution for sustainable food production in urban settings, contributing to improved food security and environmental sustainability. By integrating FLOAT with conventional practices, we aim to exceed Singapore’s 2030 food security targets and achieve lasting urban food resilience. FLOAT aims to scale sustainable food production, fostering community ties with food, and nurturing future responsibility.
Preferred Distance in Human–Drone Interaction
Authors: Wögerbauer Elisabeth Maria , Castell Christoph von , Welsch Robin , Hecht Heiko
Published: October 2024

In two augmented-reality experiments, we transferred the paradigm of interpersonal distance regulation to human–drone interaction. In the first experiment, we used a simple spherical drone model and explored how both hovering height and approach angle affect the preferred distance. Drone height above the ground had a strong effect. The preferred distance to the drone was larger than that typically found toward human actors, in particular, when the drone trajectory was very high. In the second experiment, we sought to gain a deeper understanding of the factors that may influence this effect. In addition to the simple spherical drone model used in the first experiment, we also varied its appearance and attachment to the ground. Surprisingly, anthropomorphic features increased preferred distances. We, therefore, discuss the extent to which social aspects and subjectively perceived danger influence the preferred distance for interaction with drones, which thus need to be considered in the design of human–drone interaction.
Artifical intelligence for credit risk model, or how do machine learning algorithms compare to traditional models?
Authors: Rajka László , Pollák Zoltán
Published: October 2024

A new generation of credit risk management models has surfaced as a result of the technology revolution marked with artificial intelligence, which in short is a term for models based on machine learning. Expert systems represented the past in the development of credit risk models over some decades, while traditional statistical models, e.g., logistic regression are the present and machine learning methods are expected to be the future. The objective of this study is to describe and empirically analyse the classification algorithm XGBoost, one of the most promising examples of the latter machine learning models to reveal the degree of increase in efficiency machine learning algorithms can achieve compared to the traditional modelling methods currently regarded to be industrial best practice. In our study, both Artificial Neural Network (ANN) and XGBoost, models relying on artificial intelligence, have surpassed logistic regression in terms of efficiency of classification. Although machine learning methods have an excellent capability of prediction, the interpretation of decision-making models they offer is quite cumbersome compared to their traditional peers, which is a disadvantage. Because of the “black box nature” of machine learning methods based on artificial intelligence, banks are currently limited regarding their application. Therefore, the authors propose the current rules and guidelines corresponding to the traditional models should be reviewed so as to give way to banks for the application of machine learning models and, as a result, to improve the efficiency of their credit risk management.
Instrumental diagnosis of cognitive impairment in workers engaged in the maintenance of agricultural machinery
Authors:   Ufa Institute of Occupational Health and Human Ecology, the city of Ufa, Russia, Masyagutova L. M. ,   Bashkir State Medical University, Ufa, Russia, Gallyamova S. A. ,   Ufa Institute of Occupational Health and Human Ecology, the city of Ufa, Russia, Vagapova D. M. ,   Ufa Institute of Occupational Health and Human Ecology, the city of Ufa, Russia, Shaikhlislamova E. R. ,   Ufa Institute of Occupational Health and Human Ecology, the city of Ufa, Russia; Bashkir State Medical University, Ufa, Russia, Abdrakhmanova E. R. ,   Ufa Institute of Occupational Health and Human Ecology, the city of Ufa, Russia; Bashkir State Medical University, Ufa, Russia, Rafikova L. A. ,   Ufa Institute of Occupational Health and Human Ecology, the city of Ufa, Russia, Gabdulvaleeva E. F. ,   Ufa Institute of Occupational Health and Human Ecology, the city of Ufa, Russia; Bashkir State Medical University, Ufa, Russia
Published: October 2024

Workers engaged in the maintenance of agricultural machinery are exposed to a number of production factors in the course of their work, which can be considered as risk factors for the development of cognitive impairment. The purpose of the work: to diagnose cognitive disorders using informative instrumental methods of examination of mental functions, such as cognitive evoked potentials P 300, ultrasound duplex scanning of brachiocephalic arteries in combination with the determination of the atherogenicity index. In order to diagnose the stages of cognitive impairment early, optimal quantitative and qualitative signs in combination with professional experience and age have been determined. Each feature was evaluated in points, which are further summarized. The stages of cognitive impairment are determined by the sum of the points.
Study of the effect of a composition with curcumin and methionine on the intestinal microbiota
Authors:   Department of Microbiology named after V. S. Kiktenko, Russian Peoples’ Friendship University named after.Patrice Lumumba, 117198, Russia, Moscow, Hisamova A. A. , Giesinger O. A. ,   Department of Microbiology named after V. S. Kiktenko, Russian Peoples’ Friendship University named after.Patrice Lumumba, 117198, Russia, Moscow
Published: October 2024

Maintaining microbiota balance is important for maintaining intestinal homeosta sis. Curcumin, an active component of curcuma longa rhizomes, can contribute to chang es in the qualitative and quantitative composition of the microbiota. The study assessed the effect of a composition with curcumin and methionine on the intestinal microbiota of mice using gas chromatography-mass spectrometry of microbial markers as modified by Osipov, which showed a change in the qualitative and quantitative composition of the intestinal microbiota.
Community-acquired pneumonia: results of KNOCAP-I project. Dependence of specialists’ knowledge on work experience
Authors:   FSBEI HE Mari State University, Kazan State Medical Academy – Branch of the FSBEI CPE Russian Medical Academy of Continuous Professional Education,, Bontsevich R. A. , Gavrilova A. A. ,   FSBI Central Research Institute of the Military Air Force of the Ministry of Defense of the Russian Federation, ANO Research Medical Center “Gerontology”, 116, Kompaniets O. G. ,   FSBEI HE Kuban State Medical University, Krasnodar, Russia, Maksimov M. L. ,   Kazan State Medical Academy – Branch of the FSBEI CPE Russian Medical Academy of Continuous Professional Education, FSAEI HE Pirogov Russian National Research Medical University of the Ministry of Health of Russia
Published: October 2024

This paper presents the results of the first phase of the KNOCAP project and examines the degree of preparedness of physicians with different work experience in issues of diagnosis and pharmacotherapy of community-acquired pneumonia.
Occupational risk and female reproductive health in harmful and unfavorable working conditions and issues of male fertility
Authors:   FSBEI HE Samara State Medical University of the Ministry of Health of the Russian Federation, Babanov S. A. , Strizhakov L. A. ,   FSBSI Izmerov Research Institute of Occupational Health; FSAEI HE I. M. Sechenov First Moscow State Medical University (Sechenov University) of the Ministry of Health of the Russian Federation, Kazakova A. V. ,   FSBEI HE Samara State Medical University of the Ministry of Health of the Russian Federation, Agarkova I. A. ,   FSBEI HE Samara State Medical University of the Ministry of Health of the Russian Federation
Published: October 2024

Currently, in the context of a decline in the working -age population in the Russian Federation, associated with a decrease in the bir th rate and an increase in mortality, protecting the reproductive health of the population is the crucial area of state policy that determines the national security of Russia. The article is devoted to assessing the role of harmful and unfavorable working conditions in the formation of the reproductive health of female workers and male fertility.
Imaginário social e Educação Ambiental: o papel dos agentes educacionais no desenvolvimento sustentável da Comunidade Nossa Senhora das Graças na Costa da Conceição, Itacoatiara (AM)
Authors: Lira Rosa Marilia Rosas , Billacrês Máximo Alfonso Rodrigues
Published: October 2024

A pesquisa foca no imaginário social dos agentes educacionais da Escola Estadual Anília Nogueira da Silva na Comunidade Nossa Senhora das Graças na Costa da Conceição, em Itacoatiara, e a sua relação com o manejo sustentável de recursos naturais e o desenvolvimento rural sustentável. A pesquisa adota uma abordagem qualitativa, utilizando o estudo de caso, análise documental, entrevistas semiestruturadas e observação participante. Os resultados destacam a importância do engajamento dos educadores com a realidade socioambiental da comunidade, que apresenta grande potencial de recursos naturais. Contudo, o estudo revela desafios na implementação de práticas pedagógicas voltadas à sustentabilidade, como a falta de infraestrutura adequada e a ausência de uma abordagem mais profunda nos documentos pedagógicos da escola sobre educação ambiental. O trabalho sugere a necessidade de políticas públicas que integrem o currículo escolar com práticas sustentáveis, visando promover a preservação ambiental e o bem-estar da comunidade.
Understanding occupational therapists' use of acceptance and commitment therapy in New Zealand
Authors:   , du Toit Dominique
Published: October 2024

Acceptance and commitment therapy is a gold standard third wave behaviour therapy effective in treating a range of conditions including depression, anxiety, phobias, schizophrenia and pain, yet there is little empirical research supporting its use by occupational therapists. Acceptance and commitment therapy aims to increase engagement in meaningful activities in a strengths-based non-judgmental way. It combines talk therapy with real world skills building. Importantly in a New Zealand context, there is evidence to suggest that acceptance and commitment therapy is able to work well alongside indigenous models of health to improve equitable outcomes. Anecdotally there is much support for its use by occupational therapists. However, occupational therapy interventions are research informed and therefore research is needed to demonstrate effectiveness within the occupational therapy paradigm. The current research is a mixed methods study incorporating surveys and focus groups to gather qualitative and quantitative data. The goal of the research was to ascertain whether New Zealand occupational therapists believe that acceptance and commitment therapy is congruent with occupational therapy, including a clear clinical rational as to their answer. Occupational therapists who engaged in this research identified a range of theoretical underpinnings, such as the importance of context and flexibility within assessment and intervention, shared between ACT and occupational therapy. They also identified and were able to identify ACT processes and interventions useful within an occupational therapy perspective, including metaphors, values-guided meaningful occupation, doing-based interventions, and mindfulness. The outcomes of this research support tertiary institutions and workplaces to fund this gold standard treatment as part of an occupational therapist’s toolkit.
Applying geotechnical borehole databases in the search for interglacial deposits in Denmark
Authors: Schou Nielsen Emil , Nielsen Trine Kellberg , Kristiansen Søren Munch
Published: October 2024

Geotechnical investigations conducted in preparation for infrastructure development provide high-quality borehole data in standardised digital formats. In Denmark, such geotechnical borehole data are not required to be reported to the national well database (Jupiter) and are mainly archived in privately owned databases. Accessible interglacial and interstadial terrestrial deposits are rare in Denmark, and these borehole data have the potential to identify interglacial and interstadial deposits, with significant implications for ongoing palaeoclimate, palaeoenvironmental and archaeological research. In this study, we compiled data from six major geotechnical companies, resulting in a database with over 550 000 boreholes. From this database, we identified 1850 boreholes containing samples associated with interglacial and interstadial ages. Through extensive filtering for well-documented lacustrine or palustrine deposits, we selected 161 boreholes and referenced them to 39 different geographical occurrences. Of these 39 occurrences, 36 were either new terrestrial deposits or provided substantial new records to known interglacial and interstadial sites. Our findings demonstrate that access to these privately owned geotechnical borehole data can be a valuable resource for identifying rare near-surface geological deposits, allowing the discovery of several new Pleistocene sedimentary archives that warrant further investigation.
Developing Omni Channel Financial dan Operational Kalbe pada PT Karya Hasta Dinamika
Authors: Ivonne Ivonne , Karmudiandri Arwina , Susanto Yulius Kurnia
Published: October 2024

Merdeka Belajar – Kampus Merdeka (MBKM) provides opportunities for students to gain wider learning experiences and new competencies. The agency where I participated in this internship is PT Karya Hasta Dinamika which focuses on e-commerce for health and fitness products. The responsibility that I have at PT Karya Hasta Dinamika is related to Account Receivable. In addition, I also completed/worked on several cases and projects given by the mentor in the form of making Standard Operating Procedures (SOP), KHD Reports, and Auto Validation Mocha. This report is intended to motivate readers to take part in this internship program in order to increase their knowledge and experience in the world of work. The limitations of this report are the limitations in the attachments provided because of the company's secrets, which must be maintained.
Solubility of betulin in supercritical CO2 and CO2 + ethanol mixture
Authors: Сабирова Л.Ю. , Яруллин Л.Ю. , Хабриев И.Ш. , Хайрутдинов В.Ф. , Билалов Т.Р.
Published: October 2024

Динамическим методом экспериментально изучена растворимость бетулина в чистом и модифицированном сверхкритическом диоксиде углерода (СК-CO2) при 313,15-333,15 К и 8,0-30,0 МПа. Установлено, что в чистом СК-CO2 происходит набухание бетулина без его растворения. Растворимость бетулина повышается при добавлении 5 %-го этанола в качестве сорастворителя. Установлены давления, отвечающие первой и второй кроссоверным точкам - (7,7-8,3) МПа и (27,1-27,6) МПа, соответственно. Экспериментальные данные описаны с использованием модели, основанной на уравнении состояния Пенга-Робинсона.

The results of experimental investigation of betulin solubility in pure and modified supercritical carbon dioxide in the range of temperature (313.15 -333.15 K) and pressure (8.00-30.00 MPa) using the dynamic method are presented. It was found that in pure supercritical carbon dioxide betulin does not dissolve but only swells. The addition of 5 % ethanol as a co-solvent increases the solubility. The pressures corresponding to the first and second crossover points of - (7.7-8.3) MPa and -(27.1-27.6) MPa, respectively, are established in this work. The results of the descri ption of the experimental data using a model based on the Peng-Robinson equation of state are presented.
Pair correlation function for equilibrium critical state of fluids on the mesoscopic space scale
Authors: Чайкина Ю.А. , Ветчинкин А.С. , Голубков М.Г. , Лундин А.А. , Родионов И.Д. , Шушин А.И. , Уманский С.Я.
Published: October 2024

В настоящей работе впервые прямым способом в мезоскопическом масштабе длин решена «флуктуационная теорема». Получено аналитическое выражение для парной корреляционной функции критического состояния флюида, параметром которой является дисперсия плотности, легко восстанавливаемая из оптических экспериментов. Сравнение нашего результата с парной корреляционной функцией Орнштейна—Цернике позволило определить поправку Фишера η = 0,25, повышающую сходимость. Показано, что полученные результаты дают надежную теоретическую основу для оптической диагностики статистического состояния критических флюидов.

In this paper we have solved the «fluctuation theorem» on the mesoscopic length scale for the first time in a direct way. An analytical expression for the pair correlation function of the critical state of fluid was obtained, where the density variance is the parameter that could be easily defined by optical measurements. By comparison of our result with the Ornstein—Zernike pair correlation function we have got the Fisher index η= 0.25 to increase the convergence. It was shown that the obtained results provide a reliable theoretical basis for optical diagnostics of the critical state of fluids.
Supercritical fluid extraction of avermectin from Streptomyces avermitilis using carbon dioxide
Authors: Ивахнов А.Д. , Скребец Т.Э.
Published: October 2024

Методом полного факторного эксперимента с использованием ротатабельного униформ-плана второго порядка проведена оптимизация извлечения авермектина из бактериальной биомассы Streptomyces avermitilis методом сверхкритической флюидной экстракции диоксидом углерода. При планировании в качестве основных уровней выбраны давление 25 МПа, температура 60°С, продолжительность экстракции 100 мин. Анализ уравнения регрессии позволил установить оптимальные параметры процесса: 30 МПа, 85°С, продолжительность 133 мин. В контрольном эксперименте получен экстракт с выходом 13 %, содержащий 41 % авермектина. Выход авермектина составил 5,36 % от абсолютно сухого сырья, что превышает выход при экстракции органическими растворителями.

The process of supercritical fluid extraction of avermectin from the bacterial biomass of Streptomyces avermitilis with carbon dioxide was optimized by the method of a full factorial experiment using a second-order rotatable uniform plan. When planning, the main levels chosen were a pressure of 25 MPa, a temperature of 60°C, and an extraction duration of 100 min. The analysis of the regression equation made it possible to establish the optimal process parameters: 30 MPa, 85°C, and 133 min. In the control experiment, an extract was obtained with a yield of 13 %, containing 41 % avermectin. The yield of avermectin was 5.36 % of absolutely dry biomass, which exceeds the extraction yields obtained using organic solvents.
Ferrocene-modified siloxane aerogels
Authors: Панова Л.В. , Леменовский Д.А. , Афанасов М.И. , Попков М.А. , Бурлуцкий Р.О. , Брусова М.М. , Таланова В.Н. , Холодков Д.Н.
Published: October 2024

Разработан эффективный метод синтеза силоксановых аэрогелей гибридного строения с встроенными в их полимерную структуру ферроценовыми фрагментами. На начальном этапе получали гель путем поликонденсации тетраэтоксисилана и ферроценсодержащих алкоксисиланов, катализируемой BF3 · Et2O в ацетоне. Превращение гелей в аэрогели проводилось с использованием сверхкритического диоксида углерода (СК-CO2). Образцы аэрогелей были подробно охарактеризованы методами мессбауэровской спектроскопии и адсорбции азота, определена плотность материалов. Содержание железа в полученных аэрогелях находится в пределах 3,6—8,7 мас. % железа (или 11,9—28,7 мас. % ферроценовых звеньев).

An effective method for the synthesis of hybrid structure siloxane aerogels with ferrocene fragments built into polymer structure has been developed. At the initial stage, a gel was obtained by polycondensation of tetraethoxysilane and ferrocene-containing alkoxysilanes, catalyzed by BF3 · Et2O in acetone. The transformation of gels into aerogels was carried out using SC-CO2. The aerogel samples were characterized in detail by Mossbauer spectroscopy and nitrogen adsorption methods, and the density of the materials was determined. The iron content in the resulting aerogels varies in the range of 3.6—8.7 % by weight of iron (or 11.9—28.7 % by weight of ferrocene units).
Analysis of the impact of coronavirus infection on human health: epidemiological data, vaccination strategies, psychological aspect, consequences (literature review)
Authors: Hrytsenko L. , Dyuzhikova O.
Published: October 2024

The COVID-19 (COronaVIrus Disease 2019) pandemic has caused widespread morbidity, mortality, and socioeconomic crisis around the world. Since its first outbreak in 2019, COVID-19 has evolved continuously, leading to the emergence of several variants that have gained greater transmission efficiency, severity, and immune evasion properties. Vaccination has proven to be an important strategy to control the spread of the virus and mitigate its impact. The development of multiple COVID-19 vaccines within 1 year of the virus's emergence was unprecedented. The purpose of the article was to analyze and summarize the scientific literature on the impact of COVID-19 on global health, including epidemiological data, vaccination strategies, psychological impact of the pandemic, and human health outcomes. The analysis found that COVID-19 vaccination has been very effective in reducing morbidity, hospitalizations and intensive care unit admissions. However, ongoing surveillance, monitoring of options and adaptive vaccination strategies are crucial to maximize the benefits of vaccination and effectively control the spread of the virus. Globally, the dramatic and rapid spread of COVID-19 has triggered social changes that have led to an increased burden of mental health and fear-related behaviors. The physical and social distancing imposed in many parts of the world has had a significant impact on how the general population communicates and interacts with each other. Extreme avoidance of the lack of social contact has created a sense of "disconnection" that has been further exacerbated by the inability to meet friends and family at social gatherings and supportive places such as churches, restaurants, workplaces, and sports facilities. The closure of schools and many businesses, along with rising unemployment, further exacerbated feelings of isolation, financial hardship, anxiety, and depression. The article provides information on the mental impact of COVID-19 on patients, namely, the virus contributes to mental distress, anxiety, depression, suicide risk, post-traumatic stress disorder, cognitive impairment and sleep disorders.

Keywords: COVID, spread, vaccines, anxiety, depression.
„Mint a Kohn meg a Grün a Bazilika lépcsőjén…” : Holokauszt-emlékezet egy budapesti zsidó közösség humorának tükrében
Authors: Papp Richárd
Published: October 2024

Tanulmányomban a holokauszt emlékezetének jelentéseit próbálom értelmezni egy budapesti zsinagógai közösség humorának szemszögéből, a szociokulturális emlékezethez kapcsolódóan. Több évig kutattam a zsidó humor jelentéseit egy budapesti zsinagógai közösségben. A zsidó humorral kapcsolatos terepmunkám után új kutatásba kezdtem Csepeli György kollégámmal a magyarországi holokauszt emlékezetéről. Terepmunkán és fókuszcsoportos interjúkon alapuló kutatásunk a holokauszt helyi emlékezetét elemzi több településen, így mély és reprezentatív betekintést nyújt a holokauszt-emlékezet aktuális jelentéseibe. Kutatási eredményeink azt mutatják, hogy Magyarországon a holokauszttal kapcsolatos társadalmi emlékezetet makro- és mikroszinten egyaránt még mindig a közöny, az elhallgatás és a felejtés uralja. Felmerül tehát a kérdés, hogy ebben a „közömbös” társadalmi emlékezeti kontextusban képes-e a humor oldani a holokauszt traumáiból fakadó feszültséget, amely a magyarországi nyílt társadalmi párbeszédből a mai napig hiányzik. Vajon képes-e a zsidó humor enyhíteni a holokauszt borzalmainak emlékét? Tanulmányomban többek között ezekre a kérdésekre keresem a válaszlehetőségeket.
Értékek a részvétel mögött
Authors: Kerpel-Fronius Balázs
Published: October 2024

Tanulmányomban képet alkotok a magyar társadalom politikai részvételéről, a demokrácia és a participáció értékként való megjelenéséről a társadalom különböző integrációs csoportjaiban. Kutatásom alapját a Kovách és társai (2016, 2018) által alkalmazott integrációsmodell jelentette. A modellhez hasonlatos csoportokat alakítottam ki, a European Social Survey (ESS) 2020. évi adatai segítségével. A vizsgált csoportok politikai részvételét az Ekman – Amna (2012) és Oross Szabó (2020) által alkotott tipológia szerint elemeztem, különös tekintettel az online részvételre. Vizsgálom, hogy a különböző integrációs csoportokban a demokrácia és a politikai részvétel mint érték hasonlóképpen jelenik-e meg. Úgy gondolom, hogy a különböző társadalmi csoportok eltérő politikai aktivitásának, vagy éppen e térből való kiszorulásának vizsgálata állandó relevanciával bír.
Gúny és bajtársiasság : Az Identitás Generáció ifjúsági mozgalom viszonyainak és ellenségképeinek kulturális antropológiai elemzése
Authors: Kiss Máté
Published: October 2024

Tanulmányomban megkísérlem bemutatni és értelmezni a kulturális antropológiai terepmunka módszertanával kutatott budapesti és párizsi Identitás Generáció ifjúsági mozgalmak politikai viszonyait, szövetségesi, szimpatizánsi rendszerüket és ellenség konstrukcióikat, utalva az ambivalens viszonyként leírható kapcsolatokra is. Elemzésem célja az is, hogy ne pusztán egy-egy statikus képet felvillantva szemléltessem a vizsgált csoportok ellenségeket és szövetségeseket teremtő diskurzusait, hanem, követve terepkutatásom eseményeit, feltáruljanak a változások, átértékelő mozzanatok is.
Akik utoljára nevetnek : Élő humor és virtuális közösség a Vajdaságban
Authors: Rácz Krisztina
Published: October 2024

A tanulmány két, a vajdasági magyarok által ismert és közkedvelt humoros Facebook oldal mémjeiben leggyakrabban fölmerülő témákat vizsgálja. A mémek vizuális és szöveges elemei a vidékiséghez, az ételekhez és közös étkezésekhez, az etnikai másokhoz (szerbek és magyarországi magyarok), illetve azok nyelvéhez és kultúráihoz, valamint a határátlépéshez kötődnek. A tanulmány a közös témáknak és azok ábrázolási módjainak elemzésével a humor helyi kulturális és nyelvi sajátosságaira világít rá, illetve arra, hogy milyen funkciót tölt be a virtuális humor egy olyan közösségben, amely nemcsak kisebbségi, hanem egyre inkább diaszporikus jellegű is.
Study of the Sodium Borohydride Hydrolysis Reaction's Performance via a Kaolin-Supported Co-Cr Bimetallic Catalyst
Authors: Onat Erhan , Ekinci Selma
Published: October 2024

Hydrogen is an attractive source of energy because of its properties, which include superior quality, effectiveness, pureness, dependability, and sustainability. Technologies for producing and storing hydrogen are being developed in parallel with fuel cell development. Chemical storage of hydrogen in a metal hydride containing boron eliminates the problem of hydrogen transportation and storage. Through catalytic reactions, hydrogen stored in solid form in boron hydrides can be recovered. In this study, a nowel developed Co-Cr bimetallic catalyst supported by kaolin, a natural mineral, was synthesized to be used for hydrogen production by hydrolysis of sodium boron hydride. The structural characteristics of the produced Co-Cr@Kaolin catalyst were ascertained by EDX, FTIR, and SEM analyses. Next, the ideal conditions for the hydrolysis reaction of sodium borohydride (NaBH4) catalyzed by Co-Cr@Kaolin were examined. These included the concentration of the catalyst, the amount of support material (kaolin), the amount of catalyst, and the concentration of NaBH4. The optimal hydrolysis conditions were found to be 2.5% NaOH concentration, 40 mg of catalyst, and 2% NaBH4 concentration at 303 K. The maximum rate of hydrogen production was determined as 5007 ml g-1 min-1 under optimal conditions. After conducting hydrolysis operations at different temperatures to elucidate the reaction kinetics, it was found that the catalytic hydrolysis reaction was of the 0th order and that the reaction activation energy was 19.36 kJ mol-1. The hydrogen production rate obtained as a result of the hydrolysis reaction accompanied by a Co-Cr catalyst was determined as 3166 ml g-1 min-1. It is therefore established that supporting kaolin to Co-Cr catalyst enhances its efficacy.
Investigation of the Electrical Properties of Cu-doped CoOx/n-Si Structures Fabricated by the Sol-Gel Method
Authors: Yıldız Yusuf , Rüzgar Şerif
Published: October 2024

The sol-gel spin coating technique was employed for the deposition of thin films comprising CoOx, Cu-doped CoOx, and CuOx onto n-Si substrates. Subsequently, an exhaustive examination of the electrical properties of the resultant heterojunction structures was conducted. The outcomes unequivocally indicate that the incorporation of Cu through doping exerts a pronounced influence on the electrical attributes of the CoOx/n-Si diode. Notably, all diodes exhibit rectifying behavior, a discernible feature in their dark current-voltage (I-V) characteristics. The I-V data was further utilized to ascertain pivotal junction parameters, encompassing series resistance (Rs), rectification ratio (RR), ideality factor (n), and barrier height (ΦB). The values of the ideality factor for CoOx/n-Si, Cu doped CoOx/n-Si and CuOx/n-Si are obtained to be 3.19, 1.99 and 2.19 eV, respectively. Furthermore, the capacitance-voltage (C-V) characteristics of diodes were performed within the frequency range of 10 kHz to 1 MHz. These findings underscore that judicious manipulation of the copper doping concentration can serve as an effective means to modulate the electrical properties of CoOx/n-Si diodes.
Exact Solutions of Boussinesq Equations By Hirota Direct Method
Authors: Gümüş Halide , Baykal Abdullah
Published: October 2024

Boussinesq Equations (BSQ) are the focus of this article. First, we provide a basic overview of Hirota's D operator, which is used to build multi-soliton solutions for equations involving nonlinear evolution. After that, some details regarding fourth-order BSQ are provided, and we use Hirota's direct method to find a one-solution solution. Hirota's bilinear approach is also used to solve a class of sixth-order Boussinesq-like equations with nonlinear evolution. The outcomes verified that this approach requires complete integrability.
Modifiye Hummers Yöntemi ile Grafen Oksit Sentezinde Bor Bileşiklerinin Kullanılması
Authors: Yılmaz Mertsoy Esra , Korucu Haluk
Published: October 2024

Bu çalışmada grafitten Hummers Tour metodu ile grafen oksit sentezinin performans değerlendirilmesi üzerinde durulmuştur. Hummers Tour metodunda tüm şartlar aynı kalacak şekilde sadece fosforik asit, borik asit veya boraks dekahidrat bileşikleri değiştirilerek, bu kimyasalların grafen oksit sentezi üzerindeki etkilerinin değerlendirilmesi hedeflenmiştir. Grafen oksit örneklerinde; BET analizi ile yüzey alan (YA), FTIR ile yapı karakterizasyonu, ZETA-SIZER ile Zeta Potansiyeli (ZP) ve Parçacık boyut dağılımı (PB), SEM+EDS ile oksidasyon dereceleri (C/O), XRD analizi ile kristal boyutu (KB) ve Raman analizi ile yapıdaki kusur oranı (ID/IG) analiz edilerek, örnekler arasındaki iyileşme oranları belirlenmiştir. İyileşme oranları grafit örneğinin özellikleri referans alınarak belirlenmiştir. İyileşme oranları için en iyi sonuçlar; YA için % 7,7 ve PB için %37,9 ile fosforik asit ile sentezlenen grafen oksit örneğinde ve C/O oranı için %97,4 , ZP için %100,5 ve KB için ise % 84,30 ile boraks dekahidrat ile sentezlenen grafen oksit örneğinde elde edilmiştir. D/G için iyi iyileşme oranı % 67,85 ile borik asit le sentezlenen grafen oksit örneğinde elde edilmiştir. Çalışma sonuçları göstermiştir ki grafen oksit sentezinde fosforik asit yerine bor bileşiklerinin kullanılması avantajlı olmaktadır.
Çanakkale İlinin Kentsel Alan Değişiminin SLEUTH Model ile Analizi
Authors: Polat Ahmet Batuhan , Akçay Özgün
Published: October 2024

Kentsel alanların değişiminin tahmin edilmesi, kent planlaması ve yönetimi için kritik öneme sahiptir. Bu sebeple SLEUTH gibi uzamsal modelleme tahmin araçları bu alanda sıklıkla kullanılmaktadır. Özellikle hızlı gelişen kentlerden biri olan Çanakkale’nin güncel bir kentsel yayılma analizi uzamsal açıdan ele alınmadığı görülmektedir. Bu çalışmada Çanakkale ilinin 2025,2030,2035 ve 2040 yılları için kentsel alanların gelişimi incelenmiştir. Veri seti olarak eğim haritası, arazi örtüsü haritaları, gelişimden hariç tutulacak alanlar, kentsel alan, yol ulaşım ağı ve kabartma haritası kullanılmıştır. Modelin test aşaması gerçekleştirildikten sonra kalibrasyon aşamasında en uygun kentsel büyüme katsayılarını belirlemek amacıyla sırasıyla kaba, hassas ve final kalibrasyon işlemi gerçekleştirilmiştir. Yapılan kalibrasyon sonucu SLEUTH modelde kullanılacak olan kentsel büyüme katsayılarından difüzyon, cins, yayılma, eğim ve yol ağırlığı katsayı değerleri sırasıyla 75, 25, 46, 76, 75 olarak belirlenmiştir. Yapılan kentsel alan gelişim simülasyonları sonucunda 2019 yılından 2040 yılına kadar geçen 21 yıllık sürede kentsel alanlarda toplam %43lük bir artış beklenirken tarım/çıplak toprak alanlarında ise yaklaşık %23lük bir düşüş olacağı öngörülmüştür. Ayrıca oluşturulan senaryoyu doğrulamak için 2023 yılı referans arazi örtüsü verisi, SLEUTH model sonucu oluşturulan 2023 yılı tahmini kentsel gelişim haritası karşılaştırılmış ve %7 fark görülmüştür. Bu sonuçlar kentsel yayılımın olduğu bölgelerde altyapı çalışmalarına ve çevre düzenlemelerine ön hazırlık ve planlama yapılması açısından önem taşımaktadır.
Keylogger ve Gizlilik: Makine Öğrenimi Modellerinin Karşılaştırması
Authors: Kızıltepe Seher , Gülbandılar Eyyüp
Published: October 2024

Keylogger yazılımları, kullanıcının klavye kullanarak girdiği verileri günlüğe kaydederek yakalayıp, tutan ve bunları saldırgan'a gönderen casus yazılımlardır. Kişisel bilgilerin ve gizliliğin tehlikeye girmesine neden olabileceği için bu konuda yapılan çalışmalar gizlilik ve güvenliği sağlamak açısından büyük önem taşımaktadır. Makine Öğrenimi (ML) yöntemleri, anormallikleri analiz ederek tespit edebilir ve keylogger'ları tanımlayabilir. Bu çalışmanın amacı, keylogger'ları tespit edebilen ve en yaygın kullanılan ML yöntemlerini belirleyerek bu yöntemler arasında performans karşılaştırması yapmaktır. Bu amaç doğrultusunda, bir veri seti üzerinde LightGBM, kNN, Decision Tree ve Random Forest modellerinin keylogger tespitindeki doğruluk oranlarını hesaplayarak performans karşılaştırmaları yapılmıştır. Yapılan çalışmada AUC skoru sonuçlarına göre Random Forest modelinin diğer modellere kıyasla daha iyi sınıflandırma performansı sergilemektedir. Doğruluk skoru sonuçlarına göre ise Decision Tree ve Random Forest modellerinin diğer modellere göre daha iyi doğruluk sağladığını gösterirken, kNN ve LightGBM modellerinin daha düşük performans gösterdiğini göstermektedir. Sonuç olarak, AUC skoru ve doğruluk skoru kullanılarak yapılan değerlendirmeler farklı sonuçlar ortaya koymaktadır. AUC skoru, sınıflandırma performansını daha geniş bir perspektiften değerlendirirken, doğruluk skoru doğru sınıflandırma oranına odaklanır. Random Forest modeli, hem AUC skoru hem de doğruluk skoru açısından diğer modellere göre daha iyi performans göstermektedir.
Doğru Akım Özdirenç Verilerinin İki-Boyutlu Ters Çözümü ile Yeraltı Suyu Araştırması; Abant/Bolu Örneği
Authors: Özyıldırım Özcan , Başaran Can
Published: October 2024

Bu çalışmada Bolu Abant sahasındaki bir tatil köyünün su ihtiyacının giderilmesi amacıyla doğru akım özdirenç çalışması yapılmıştır. Çalışmanın gerçekleştirilmesinden önce bölgede mevcut olan sondaj litolojileri ve jeolojik bilgiler kullanılarak sahanın kavramsal modeli oluşturulmuştur. Kavramsal model üzerinde modelleme çalışması yapılarak, saha çalışması öncesinde hangi veri toplama geometrisinde hedeflenen model bileşenlerinin çözümünde daha başarılı olacağı belirlenmiştir. Pol-dipol elektrot dizilimleri kullanılarak, ikisi mevcut sondajlarla kesişen, altı profilde doğru akım özdirenç verileri toplanmıştır. Verilerin iki boyutlu ters çözümü gerçekleştirilerek, özdirenç kesitleri elde edilmiştir. Sondajların kesiştiği iki profildeki özdirenç kesitleri referans alınarak sahada en uygun konumda sondaj yeri önerisi yapılmış ve ihtiyacı karşılayacak yeraltı suyuna ulaşılmıştır. Sonuçların başarısı ortamın jeolojisine göre yöntemin belirlenmesi ve seçilen yöntemin kavramsal model üzerinde denenmesine dayanmaktadır.
Ligustrum vulgare (Kurtbağrı) Meyve ve Yapraklarının in vitro Antioksidan ve Antibakteriyel Aktivite, Toplam Fenolik, Makro- ve Mikro-mineraller Açısından Değerlendirilmesi
Authors: Akbulut Hatice Feyza
Published: October 2024

Ligustrum (Oleaceae) Avrupa ve Asya'da geleneksel Çin tıbbında uzun bir kullanım geçmişine sahiptir. Birkaç Ligustrum türünün yapraklarından üretilen bir infüzyon, geleneksel olarak halk hekimliğinde orofaringeal inflamasyona, hipertansiyona, baş ağrısına veya diyabete karşı kullanılmıştır. Bu çalışma, Ligustrum vulgare meyve ve yapraklarının metanol ekstraktlarının toplam fenolik, makro ve mikromineral dağılımları ve in vitro antioksidan ve antibakteriyel potansiyellerini değerlendirmek amacıyla yapılmıştır. Bu amaçla, Ligustrum vulgare meyve ve yaprak ekstraktlarında spektrofotometre ile toplam fenolik içerik, ICP-AES ile makro- ve mikro-mineral içerikleri, ekstraktlardaki in vitro antioksidan kapasite ise 2,2-difenil-1-pikrilhidrazil analizi (DPPH analizi) ile belirlendi. Ligustrum vulgare meyve ekstraktlarının Listeria innocua, Listeria monocytogenes, Staphylococcus aureus, Staphylococcus carnosus, Bacillus cereus ve Enterococcus faecalis Gram-pozitif ve Escherichia coli ve Klebsiella pneumoniae Gram-negatif patojen bakterilere karşı antimikrobiyal potansiyeli, disk difüzyon ve minimum inhibitör konsantrasyon (MIC) yöntemleri kullanılarak değerlendirildi. Ligustrum vulgare meyvesinde tespit edilen makro-mineralerden potasyum ve mikro-minerallerden demir en yüksek miktarda bulunmuştur. Ligustrum vulgare yaprağının metanol ekstraktlarında DPPH radikal süpürme kapasitesi meyvelerdekine göre daha yüksek bulunmuştur. Ligustrum vulgare meyvesi metanol ekstraktının test edilen gram negatif bakteriler üzerinde hiçbir engelleyici etkiye sahip olmasa da gram pozitif bakterilerden Listeria innocua, Listeria monocytogenes üzerinde güçlü bir engelleme sergilemiştir.
Amino-üre Grubu ile Fonksiyonelleştirilmiş Yeni Bir Nanotaşıyıcının Sentezi, Karakterizasyonu ve İlaç Salım Özelliklerinin İncelenmesi
Authors: Gök Amelya , Demirel Süleyman Akif , Özkan Emine , Arlı Osman Tayyar
Published: October 2024

Kurkumin, anti-kanser özelliklerine sahip yaygın bir doğal üründür, ancak düşük çözünürlüğü, vücuttaki etki yerine ulaşma hızının yavaş olması ve kararsızlığı nedeniyle kanser araştırmalarındaki kullanımı sınırlıdır. Kurkuminin kanser tedavisindeki kullanımında karşılaşılan sorunların üstesinden gelmek ve tedavi süresince etkinliğini artırmak amacıyla ilaç taşıyıcı sistemlerin kullanılması çözüm olarak ortaya çıkmıştır. Yapılan bu çalışmada, ilk olarak silika taşıyıcılar arasında en yaygın olan MCM-41 malzemesi hazırlanmıştır. Daha sonra MCM-41 malzemesinin üre-amin grubu ile türevlendirilmesi sonrası MCM-41-AG malzemesi elde edilmiştir. Hazırlanan bu silika taşıyıcı sistemler kullanılarak kurkumin yükleme ve salım çalışmaları gerçekleştirilmiştir. Kurkumin yüklemesi, silika taşıyıcılar ile kurkumin çözeltisinin 24 saat karanlıkta karıştırılması ile gerçekleştirilmiştir. Bu işlem sonrası, kurkumin@MCM-41 ve kurkumin@MCM-41-AG olarak adlandırılan kurkumin yüklü malzemeler elde edilmiştir. Yapılan ölçümlerden kurkumin yükleme yüzdesi, MCM-41 için %14 ve türevlendirilmiş MCM-41-AG için %16,7 olarak hesaplanmıştır. Kurkumin@MCM-41 ve kurkumin@MCM-41-AG malzemelerinden pH 5.5 ve pH 7.4’de kurkumin salımı çalışılmıştır. Yapılan ölçümler sonrası, kurkumin@MCM-41’in her iki pH değerinde de taşıdığı kurkuminin %90’nını ilk 15 dakika içinde bıraktığı belirlenmiştir. Kurkumin@MCM-41-AG taşıdığı kurkuminin pH 5.5’de %31’ni 75 dakika içinde ve pH 7.4’de %39’nu 60 dakika içinde bıraktığı belirlenmiştir. Elde edilen bu sonuçlar, türevlendirilmiş silika taşıyıcı MCM-41-AG’in çıplak MCM-41’e kıyasla daha fazla kurkumin taşıyabildiği ve taşıdığı kurkumini daha az oranda ve daha uzun sürede kontrollü olarak bırakabildiğini göstermektedir.
Mujeres francófonas escritoras, lingüistas y pensadoras: escribir en femenino
Authors: Zilliox Alexia
Published: October 2024

En esta serie de Vídeos Didácticos de literatura, cultura y lingüística nos dirigimos a un amplio público de estudiantes de francés desde los niveles principiantes hasta los avanzados (A1-C1) que están cursando sus estudios en la Universidad de Sevilla en el Grado de Estudios franceses (EEFF), en el Doble Grado en Primaria y EEFF, en los otros Grados de Filología (en Estudios Ingleses, en Lengua y Literatura Alemanas, en Estudios Árabes e Islámicos, en Filología Hispánica, en Filología Clásica y los Doble Grados con Educación Primaria), en el MELLC (Facultad de Filología), en el MAES y en el Instituto de Idiomas de la US. Asimismo, los recursos pretenden ser accesible a cualquier otro miembro de la comunidad universitaria ya que proponemos al SAV traducir el contenido al español con los alumnos internos del Departamento de Filología Francesa y en las distintas asignaturas de traducción (Grado en EEFF- Máster Universitario en Traducción e Interculturalidad (MUenTI)) para proponer unos subtítulos en español.

Permite definir nociones básicas en torno a la autobiografía. Asimismo, se centra de manera más específica en la figura de Annie Ernaux como ejemplo de autora galardonada por sus obras de autoficción.
Államadósság az édentől keletre – hogyan szolgálja az euró az államháztartás fenntarthatóságát?
Authors: Deák Veronika , Novák Zsuzsanna
Published: October 2024

Az európai országok államadósságát összességében kedvezően érintették az utóbbi negyedévek inflációs folyamatai enyhítve a megelőző túlköltekezések fiskális egyensúlyra gyakorolt negatív hatását. Tanulmányunkban a 2008 óta végbemenő adósság-felhalmozódás mögött meghúzódó alapvető közgazdasági-statisztikai összefüggéseket vizsgáljuk lineáris panelregressziós becslések segítségével. Merítve a régiós folyamatokat feltáró szakirodalmak megállapításaiból az elemzés a kelet-közép-európai és balti országokat helyezi középpontjába, de az államadósság-dinamikát meghatározó tényezők értékelését kiterjeszti az Európai Unió egészére. A tanulmány ugyan rámutat a közös monetáris politika ellentmondásos szerepére a fenntartható adósságpálya vonatkozásában, azt is igazolja, hogy az adósság menedzselése elsősorban a hazai gazdaságpolitika felelőssége, amely nem hárítható át az európai szintű hatóságokra.
Investigating The Impact of HCI on User Experience and Productivity
Authors: Abdulazeez Jimoh
Published: October 2024

This study investigates the impact of Human-Computer Interaction (HCI) on user experience and productivity at the University of Southampton, UK. By collecting data through interviews and questionnaires from students, administrators, and lecturers, the research aims to assess the influence of HCI concepts within the academic environment. The findings reveal that HCI has a positive effect on user interaction and productivity, demonstrating that a better understanding of HCI principles enhances both user experience and efficiency. The results underscore the importance of ensuring that both computer systems and users are optimally prepared for effective interaction.
DESIGN AND EXPERIMENT OF AUTOMATIC FILM AND TAPE CUTTING SYSTEM FOR COTTON PRECISION FILM-LAYING HOLE SEEDER
Authors: BAI Shenghe , YUAN Yanwei , WEI Liang , XING Gaoyong , ZHOU Liming , NIU Kang , ZHAO Bo , LI Shuhui , WANG Yuqi , TONG Wenyu , ZHANG Shuaiyang , LIU Lijing , ZHANG Xuejun , YU Yongliang
Published: October 2024

To achieve the process of automatic film cutting for cotton and improve the efficiency of cotton precision film hole seeding machine operation, this paper proposes a wireless handle button control method and designs a automatic film and tape cutting system for cotton precision film-laying hole seeder. The system includes electromagnetic integrated valve group, hole opener lifting hydraulic cylinder, membrane pressing hydraulic cylinder, multifunctional hydraulic cylinder for cutting film, strapping support hydraulic cylinder, hydraulic limit sensor, arc-shaped film cutting shovel reset sensor, wireless control handle for film cutting and film cutting controller. The system is based on the VisualTFT platform, equipped with a multi-functional touch screen. By integrating functions such as obtaining the forward distance of the machine, hydraulic control principles, and wireless control models for film cutting and burying, it achieves automatic cutting and burying of ground film and drip tape processes. The experiment verified the working performance of the automatic film cutting and feeding system of the cotton seed precision film mulching hole seeder and the results showed that the average monitoring accuracy of the machine's forward distance was 98.16%; the response time for controlling the film cutting belt and burying film belt was ≤0.78s, and the execution time was ≤2.68s; the success rate of cutting film strips was 100.00% and the success rate of burying film strips was above 98.33%, which met the operational requirements of automatic film strip cutting for precise cotton seeding film hole planting machines.
أثر وسائل التواصل الاجتماعي على استدامة الميزة التنافسية في البنوك التجارية الأردنية
Authors: الخياط ماجد , النسور مروان , المومني رنيم
Published: October 2024

خلفية الدراسة ومشكلتها: تحاول الدراسة معرفة أثر وسائل التواصل الاجتماعي على استدامة الميزة التنافسية في البنوك التجارية الأردنية.
الأهداف: تهدف الدراسة التعرف على مستوى استخدام وسائل التواصل الاجتماعي بأبعاده (المحتوى، والحملات الاعلانية، والتفاعل مع المتابعين، ومعرفة مستويات استدامة الميزة التنافسية في الأسواق التجارية في عمّان، إضافة إلى قياس أثر وسائل التواصل الاجتماعي على استدامة الميزة التنافسية في البنوك التجارية الأردنية.
الطرق المستخدمة: تم استخدام المنهج الكمي باتباع أسلوب الدراسات المسحية على جميع العاملين في البنوك التجارية الأردنية، وتم تطوير أداة لقياس بعدي وسائل التواصل الاجتماعي واستدامة الميزة التنافسية وتكوّنت من (44) فقرة، (24) فقرة لقياس بعد وسائل التواصل الاجتماعي و (20) فقرة لقياس بعد استدامة الميزة التنافسية، وطُبّقت أداة الدراسة على عيّنة تكوّنت من (301) موظف من العاملين في البنوك التجارية الأردنية مدينة عمّان تم اختيارها بأسلوب العيّنة المتاحة (الملائمة).
النتائج: وجود أثر ذي دلالة إحصائية لوسائل التواصل الاجتماعي في تعزيز استدامة الميزة التنافسية بأبعادها (الجودة، والتكلفة، والإبداع، وابتكار المنتجات) في البنوك التجارية الأردنية، كما دلت نتائج الدراسة على عدم وجود فروق ذات دلالة إحصائية لأثر وسائل التواصل الاجتماعي على تعزيز استدامة الميزة التنافسية تُعزى لمتغيّرات (الجنس، والعمر، والمؤهل العلمي، والمستوى الإداري، وعدد سنوات الخبرة، والاستخدامات المفضلة لوسائل الإعلام الرّقمي أو التواصل الاجتماعي).
الاستنتاجات (التوصيات والمساهمة): أوصت الدراسة بإجراء المزيد من الدراسات على القطاعات التجارية الأخرى؛ لتأكيد تأثير وسائل التواصل الاجتماعي على تعزيز استدامة الميزة التنافسية.