bluuebunny/crossref_metadata_2025_split huggingface dataset:
Participation in artisanal diamond mining and food security: A case study of Kasai Oriental in DR Congo
Authors: Kazadi Hermann Nkongolo , Kusadokoro Motoi , Chitose Atsushi 
Published: October 2024

Abstract
The high prevalence of food insecurity and malnutrition in Kasai Oriental, Democratic Republic of the Congo, prompted an investigation into the complex relationship between household livelihood activities and food security. Despite many rural households relying on subsistence farming, this alone may not ensure improved food security in Kasai Oriental. Consequently, non-farm sectors like artisanal mining offer a potential solution to address food insecurity among rural households. The aim of this study is to explore the association between engagement in artisanal diamond mining, food insecurity, and children’s nutritional status in Kasai Oriental. The research utilizes household cross-sectional data collected between November and December 2022. Fixed effects and Instrumental variable models were employed to address household heterogeneity and potential endogeneity related to participation in artisanal diamond activities. The regression results reveal a significant relationship between participation in artisanal diamond mining and food security. This implies that participation increases households’ cash, enabling them to access sufficient food and potentially mitigating the risk of falling into food insecurity. However, involvement in artisanal mining has not shown a significant association with children’s malnutrition. These findings call for further research on “hidden hunger.” Policies aiming to encourage and formalize artisanal diamond mining should integrate specific extension services and inform rural households about hidden hunger.
Synthesis, structure, I–V characteristics, and optical properties of chromium oxide thin films for optoelectronic applications
Authors: Alruwaili Amani 
Published: October 2024

Abstract
Improving coating technology and thin film formation by optimizing the experimental parameters has become essential for various industrial and technological fields. This work aims to study the influence of the precursor materials on the physical and electro-optical properties of Cr2O3 thin films. The solutions were prepared using the sol–gel route and deposited on glass slides using the spin coating technique. The structure and morphology of the films were studied using XRD, FT-infrared (IR), and field-emission scan-electron microscope. The results indicated the formation of a high-purity Cr2O3 (Eskolaite) phase in the form of spherical nanoparticles with sizes of 17–25 nm. Three bands appear at 490, 765, and 889

cm

−
1

{{\rm{cm}}}^{-1}

in the FTIR spectra, which are attributed to

Cr
–
O

{\rm{Cr}}{\rm{\mbox{--}}}{\rm{O}}

/

Cr
═
O

{\rm{Cr}}{\rm{&#x2550;}}{\rm{O}}

vibrations. The I–V curves showed linear behavior and good ohmic features. Ultraviolet-visible-near infrared spectra showed that the films are highly transparent, with band gaps in the range of 2.60–2.90 eV, and refractive indices in the range of 1.92–2.25. The sheet resistances, the new figure of merit, the real and fictional dielectric constants, and the optical conductivity were discussed. The Cr2O3 thin films are the best candidates for various utilizations, including solar cells, sensors in the IR region, and energy storage.
Physical aspects of quantile residual lifetime sequence
Authors: Shrahili Mansour , Kayid Mohamed 
Published: October 2024

Abstract
The modeling of count data is found in many fields, such as statistical physics, public health, medicine, epidemiology, applied science, sociology, and agriculture. In many physical situations, it has been observed that many times in the real world, the original variables may be continuous in nature, but discrete by observation. In this study, the

α

{\rm{\alpha }}

-quantile residual life function for discrete lifetime models is defined and some attributes are investigated. The relation between this measure and the hazard rate function is studied. We discuss how this measure could be useful for finding the burn-in time of a lifetime dataset. Then, a new stochastic order based on the

α

{\rm{\alpha }}

-quantile residual life is proposed and studied.
Producción de biocombustibles en Costa Rica utilizando licuefacción hidrotérmica de biomasa: estimación preliminar de su potencial y huella de carbono
Authors: Solórzano-Jiménez Susana , Montero-Rambla Natalia , Roccard-Pommera Jessica , Durán-Herrera Esteban 
Published: October 2024

[Objective] Estimate the production potential of biofuels from the hydrothermal liquefaction (HTL) of biomass residues in Costa Rica and their respective carbon footprint. [Methodology] The generation potential of biomass residues suitable to produce biofuels through the HTL process was estimated using reports from different institutions such as the Ministry of Agriculture and Livestock, the Chamber of Poultry Farmers, and the National Water Company. In addition, using mathematical models that predict biocrude yield based on the type of biomass used, the biocrude production potential was estimated, as well as its respective upgrade to biodiesel and its co-products (biogasoline and biobunker). These results were compared with the current fuel consumption in Costa Rica. Finally, the carbon footprint for the production process of these biofuels was calculated using ISO 14067 standard. [Results] Under the assumptions of this study, it was found that Costa Rica has the potential to produce biocrude, biodiesel, biogasoline, and biobunker, amounting to 1,383,299 tons/year, 635,788 tons/year, 295,336 tons/year, and 70,140 tons/year, respectively. In addition, it was estimated that the carbon footprints associated with the production of biodiesel, biogasoline, and biobunker are 14.57 gCO2eq/MJ, 13.88 gCO2eq/MJ, and 13.33 gCO2eq/MJ, respectively. [Conclusions] Under the assumptions of this study, it was concluded that Costa Rica has a potential replacement of fossil fuels of 71%, 43%, and 76% for biodiesel, biogasoline, and biobunker, respectively. Also, it was estimated that with this technology (HTL), the carbon footprint could be reduced by 18%, 36%, and 6% when using biodiesel, biogasoline, and biobunker, respectively, instead of the corresponding fossil fuels.
ВЛИЯНИЕ ДИСПЕРСНОСТИ УГОЛЬНЫХ ЧАСТИЦ НА ХАРАКТЕРИСТИКИ ЛАЗЕРНОГО ЗАЖИГАНИЯ
Authors: АДУЕВ Б.П. , НУРМУХАМЕТОВ Д.Р. , НЕЛЮБИНА Н.В. , ЛИСКОВ И.Ю. , ВОЛКОВ В.Д. , ИСМАГИЛОВ З.Р. 
Published: October 2024

Исследовано зажигание фракций микрочастиц каменных углей марок ДГ, Г, Ж и К с узким распределением по размерам в диапазоне 0.25-44 мкм при воздействии лазерных импульсов (1064 нм, 120 мкс, 1.3 Дж). Измерены кинетические характеристики свечения образцов всего размерного ряда для каждой марки угля. Для каждой фракции выделено три стадии зажигания. Длительность первой стадии совпадает с длительностью лазерного импульса. Длительность второй занимает временной интервал 10-15 мс (угли ДГ, Г и Ж) и 3-5 мс (уголь К). Длительность третьей стадии - 60-80 мс (угли ДГ, Г и Ж) и 20 мс (уголь К). Установлено, что пороговые плотности энергии зажигания (порог зажигания) на всех трех стадиях немонотонно зависят от размеров частиц углей. Минимальные значения порогов зажигания на всех трех стадиях достигаются при размерах частиц, равных 2.2 (для угля марки ДГ), 4.0 (для угля марки Г), 0.7 (для угля марки Ж) и 2.0 мкм (для угля марки К). С использованием результатов технического анализа углей дана интерпретация наблюдаемым зависимостям критических плотностей энергии от размеров частиц углей.
The ignition of hard coal grades DG, G, Zh, and K under the action of laser pulses (1064 nm, 120 µs, 1.3 J) was studied for the fractions of microparticles with a narrow size distribution in the range of 0.25-44 µm. The kinetic characteristics of the glow of samples from the entire size range were measured for each coal rank. Three stages of ignition are distinguished for each fraction. The duration of the first stage coincides with the duration of the laser pulse. The duration of the second takes a time interval of 10-15 ms (DG, G and Zh coal ranks) and 3-5 ms (K coal rank). The duration of the third stage is 60-80 ms (DG, G, and G coals) and 20 ms (K coal rank). It has been established that the threshold ignition energy densities (ignition thresholds) at all three stages depend non-monotonically on coal particle sizes. The minimum values of ignition thresholds at all three stages are achieved at particle sizes equal to 2.2 (for DG rank coal), 4.0 (for G rank coal), 0.7 (for Zh rank coal) and 2.0 µm (for K rank coal). Using the results of the proximate analysis of coals, the observed dependences of critical energy densities on the size of coal particles are interpreted.
КОМПЛЕКСНОЕ ИССЛЕДОВАНИЕ СТРУКТУРЫ ПРОМЫШЛЕННЫХ ПОЛУКОКСОВ
Authors: ЗАХАРОВ Н.С. , СОЗИНОВ С.А. , ПОПОВА А.Н. , ИСМАГИЛОВ З.Р. 
Published: October 2024

Проведены комплексные исследования полукоксов с привлечением методов рентгеновской дифрактометрии, электронной микроскопии и методов электронного парамагнитного резонанса (ЭПР) и ядерного магнитного резонанса (ЯМР). Методом ЭПР-спектроскопии показано, что в образцах присутствует два типа радикальных структур: низкомолекулярные ароматические радикалы и сопряженные полиароматические структуры, в которых неспаренный электрон делокализован. Используя методы анализа формы линии ЭПР-спектров, установлено, что в представленной линейке полукоксов имеются различия. Показано, что ЭПР является высокочувствительным методом, позволяющим отслеживать изменения молекулярной структуры в процессе получения полукоксов. Полученные в работе результаты исследований методом ЭПР хорошо согласуются с результатами ЯМР-спектроскопии. Отмечено, что для улучшения состава исходного сырья и технологических операций, получения качественных анизотропных коксов необходима оценка молекулярной структуры промежуточных продуктов коксования.
Integrated studies of green coke have been carried out by means of X-ray diffractometry, electron microscopy, electron paramagnetic resonance (EPR) and nuclear magnetic resonance (NMR). It is determined by EPR spectroscopy that two types of radical structures are present in the samples: low-molecular aromatic radicals and conjugated polyaromatic structures in which the unpaired electron is delocalised. Analysis of line shapes in the EPR spectra reveals differences between the green coke samples under investigation. EPR is shown to be highly sensitive method allowing one to follow the changes of molecular structure during the production of green coke. The results obtained in the work with the help of EPR are in good agreement with the results of NMR spectroscopic studies. It is concluded that evaluation of the molecular structure of intermediate coking products is necessary to improve the composition of initial raw material and technological operations.
NI-, CO- И NI-CO-СОДЕРЖАЩИЕ КАТАЛИЗАТОРЫ ПАРОВОЙ КОНВЕРСИИ ИЗОБУТАНОЛА НА ОСНОВЕ БИОУГЛЕЙ
Authors: КУЛИКОВА М.В. , ОСИПОВ А.К. , ПОНОМАРЕВ С.А. , ЛОКТЕВ А.С. , ДЕДОВ А.Г. 
Published: October 2024

Ni-, Co- и Ni-Co-содержащие катализаторы паровой конверсии изобутанола получены пропиткой биоугля водно-спиртовыми растворами солей металлов. Биоуголь синтезирован методом гидротермальной карбонизации целлюлозы с последующей термообработкой полученных материалов в условиях ограниченного доступа кислорода. Катализаторы охарактеризованы комплексом физико-химических методов (ИК-спектроскопия, БЭТ, температурно-программируемая десорбция аммиака, сканирующая электронная микроскопия в сочетании с локальным рентгеноспектральным микроанализом, рентгенофазовый и рентгенофлуоресцентный анализ). Установлено, что образец 2.5Ni-2.5Co/КЦ-700 (где число перед металлом соответствует его массовому содержанию в расчете на массу восстановленного катализатора, %) демонстрирует высокий выход водорода (58 %) в конверсии изобутанола.
Ni-, Co- and Ni-Co-containing catalysts for steam reforming of isobutanol were obtained by biochar impregnation with water-alcohol solutions of metal salts. Biochar was synthesised by the hydrothermal carbonisation of cellulose with subsequent thermal treatment of the obtained materials under the conditions of limited oxygen access. The catalysts were characterised using a complex of physicochemical methods (IR spectroscopy, BET, temperature programmable desorption of ammonia, scanning electron microscopy in combination with local electron microprobe analysis, X-ray phase and X-ray fluorescence analysis). It is found that the sample 2.5Ni-2.5Co/C (where the number before the metal symbol means its mass content calculated for the mass of reduced catalyst, %) provides a high yield of hydrogen (58%) from isobutanol reforming.
Forecasting Non-stationary Time Series Using Deep Learning in a Fuzzy Time Series Framework and its Application to Stock Markets
Authors: Saleena Abdul J. , Jessy John C. , Lineesh M.C. 
Published: October 2024

Non-stationary time series prediction is challenging due to its dynamic and complex nature. Fuzzy time series models offer a promising solution for forecasting such data, but a key challenge lies in partitioning the universe of discourse, which significantly impacts forecasting accuracy. Traditional fuzzy time series models often use equal-length interval partitioning, which is more suited for stationary data and limits their adaptability to non-stationary time series. This paper introduces a novel variable-length interval partitioning method designed specifically for non-stationary time series. The developed method combines a Long Short-Term Memory (LSTM) Autoencoder with K-means clustering, enabling dynamic, data-driven partitioning that adapts to the changing characteristics of the data. The LSTM Autoencoder encodes the time series, which is clustered using K-means, and intervals are defined based on cluster centers. Furthermore, the Variable Length Interval Partitioning-based Fuzzy Time Series model (VLIFTS) is developed by incorporating this partitioning method and the concepts of Markov chain and transition probability matrix. In this model, fuzzy sets are viewed as states of a Markov chain, and transition probabilities are used in the forecasting phase. The model is validated on stock market indices Nifty 50, NASDAQ, S&P 500, and Dow Jones. Stationarity and heteroscedasticity are tested using Augmented Dickey-Fuller (ADF) and Levene's tests respectively. Statistical forecast accuracy metrics Root Mean Squared Error (RMSE) and Mean Absolute Percent Error (MAPE) show that VLIFTS significantly improves forecasting accuracy over traditional models. This hybrid approach enhances fuzzy time series modelling and can be applied to various non-stationary time series forecasting problems.
Leitura compartilhada de crianças com transtorno do espectro autista: revisão sistemática no contexto brasileiro
Authors: Rossi de Sousa Rafael , Brilhante Guimarães Silvia 
Published: October 2024

Este estudo revisou sistematicamente estudos brasileiros sobre a prática de leitura compartilhada de histórias em crianças com transtorno do espectro autista (TEA), nos últimos 5 anos. Os artigos revisados por pares que relataram contribuições e características procedimentais e de resultados para o desenvolvimento linguístico foram analisados. Após a triagem, seis estudos preencheram os critérios de inclusão para esta revisão. Nesses, concentram-se em sua maioria estudo de intervenção em diferentes contextos (escolar e clínico), as instruções de leitura compartilhada baseadas no RECALL. Limitações quanto a transparência quanto ao tipo, tempo das sessões e materiais utilizados dos estudos são apresentadas. São discutidas as implicações da leitura compartilhada para o desenvolvimento de habilidades linguísticas nesta população.

Palavras-chave: Leitura compartilhada; TEA; Revisão Sistemática.
Development of a model of a dosage form for a new domestic compound (pyrrolo[3,2-l]acridinone derivative) and studying its cytotoxic activity
Authors: Lantsova A. V. , Sanarova E. V. , Nikolaeva L. L. , Lantsova D. A. , Shklyaev Yu. V. , Barmashov A. E. , Solovieva N. L. , Baryshnikova M. A. 
Published: October 2024

Background. Expanding the list of safe and effective medicines are the main directions of development of modern medicine and pharmacy. Acridine derivatives are an interesting object of study due to their proven antitumor effect on leukemia and lymphoma. The mechanism of their antitumor effect is the ability to intercalate DNA, as well as to inhibit topoisomerases and telomerase, initiate ROS-mediated oxidative stress, arrest the cell cycle, and interact with glycoprotein-P.Aim. To develop the composition and technology for obtaining a model pharmaceutical form (PF) for parenteral use of a new compound a pyrrolo [3,2-l] acridinone derivative with antitumor activity.Materials and methods. Substance MOB 265 S (Institute of Technical Chemistry of Ural Branch of Russian Academy of Sciences – Perm Federal Research Center, Ural Branch of Russian Academy of Sciences, Russia), polyvinylpyrrolidone (PVP, Kollidon® 17PF, BASF, Germany), polyoxyl-35-castor oil (Cremophor® ELP, BASF, Germany), macrogol (15) – hydroxystearate (Cremophor® ELP, BASF, Germany), water for injection. Technological (solubilization, dissolution, filtration, lyophilization), analytical (spectrophotometry, potentiometry) and biological (in vitro) methods were used in the experimental work. Cytotoxic activity was determined on cell lines of T-cell lymphoblastic leukemia Jurkat, PC-3 prostate carcinoma, A549 lung carcinoma, colon carcinoma HCT-116, breast adenocarcinoma MCF-7.Results. In the course of experimental studies using various solubilizers, model compositions of a PF based on MOB 265 S were obtained, in which water for injection was used as a solvent. The formation of a clear solution was observed only in the model with PVP, which was characterized by basic pharmaceutical parameters and studied in vitro. The inhibitory concentration causing 50 % cell death on various cell lines was 29.6–65.5 μM.Conclusion. Model of the PF a new domestic compound (pyrrolo [3,2-l] acridinone derivative) in the form of a lyophilisate with a mass ratio of MOB 265 S: PVP – 1:5, as well as a technology for its production in 5 stages. The main quality indicators of the resulting model were selected. The results of cytotoxic activity showed that the composition is effective in all used cell cultures, with maximum cytotoxicity observed in the Jurkat leukemia cell line, which coincides with literature data on the cytotoxic activity of acridine derivatives on leukemia and malignant lymphomas. The new PF is promising for further research as an import substitution, due to the lack of acridinone derivative drugs in Russia.
Iron oxide nanoparticles as potential agents for combined radiotherapy
Authors: Shestovskaya M. V. , Luss A. L. , Makarov V. V. , Yudin V. S. , Keskinov A. A. 
Published: October 2024

Background. Iron oxide nanoparticles (NP) represent a promising theranostic platform for combined radiotherapy: the reactivity of iron oxide enhances oxidative stress of tumor cells associated with irradiation while magnetic properties may provide additional feature as controlled delivery.Aim. To study the potency of heparinized iron oxide NP in experimental antitumor therapy.Materials and methods. The synthesis of iron oxide NP was carried out by chemical precipitation followed by magnetic separation, the resulting sol was stabilized with heparin. For each batch of newly synthesized particles, the hydrodynamic diameter was determined, IR spectrometry, X-ray diffraction analysis, and scanning electron microscopy were performed. The MX-7 tumor model of rhabdomyosarcoma chosen for the study was transplanted into female C3HA mice; NP were administered intratumorally or intravenously, once a day, according to the “5–2–5” scheme. Fractional irradiation (1–2 Gy / fraction; 1.3±0.15 Gy / min) was carried out after NP administration.Increasing life expectancy (ILE), the degree of tumor growth inhibition (TGI), a pathomorphological assessment of the lung, liver, spleen and tumor node was carried out for all experimental mice.Results. As a result of the study, it was found that when administered intratumorally, heparinized iron oxide NP are retained inside the tumor, providing a moderate additive effect, compared with isolated radiotherapy in the first week of irradiation (TGI = 40 % (day 6), TFD = 10 Gy, p <0.05), however, with an increase in tumor volume by the end of the second week, the treatment regimen was not more effective than radiotherapy. with a combination of radiotherapy and intravenous administration of NP, the effect was observed within two weeks (TGI = 43 % (day 6), TGI = 29 % (day 14), TFD = 10 Gy; p <0.05; ILE = 54 %, TFD = 20Gy; p <0.05).Conclusion. The studied iron oxide nanopreparation enhanced capacity of radiation therapy to inhibit tumor growth when administered intravenouslyin experimental mice with rhabdomyosarcoma and irradiated subsequently.
Andrzej Jocz (1941–2019) – ocalić od zapomnienia
Authors: Pawłowska Aneta 
Published: October 2024

Tekst do katalogu powstał w oparciu o materiały archiwalne dotyczące postaci Andrzeja Jocza oraz rozmowy autorki z jego bliskimi znajomymi, zwłaszcza wieloletnim przyjacielem, wybitnym twórcą prof. Ryszardem Hungerem, oraz rodziną. Katalog został uzupełniony o dwa teksty osób z kręgu zawodowego i rodzinnego.

Publikacja powstała w ramach stypendium Ministra Kultury Dziedzictwa Narodowego i Sportu z zakresu upowszechniania kultury na 2021 r. (UMOWA STYPENDIALNA nr 237/2021)
Confrontos epistêmicos na percepção social das afasias e da doença de alzheimer por meio de metáforas
Authors: Morato Edwiges Maria , Freitas Nathália Luiz de 
Published: October 2024

Este texto apresenta reflexões resultantes do projeto em desenvolvimento intitulado “O papel das metáforas e dos frames na ancoragem da referência discursiva - a conceptualização das afasias e da Doença de Alzheimer” – FAPESP processo 2020/00405-4. O enfoque deste artigo, cujos pressupostos teórico-metodológicos se filiam a perspectivas pós-lakoffianas de estudo da metáfora em uso (como Cameron, 2008; Charteris-Black, 2004; Kövecses, 2005; Vereza, 2007; Silva, 2015; Semino et al., 2016) está em dois dos três objetivos do estudo: (i) analisar, por meio de expressões referenciais metafóricas, a conceptualização da afasia e da Doença de Alzheimer por leigos, indivíduos diagnosticados e especialistas (médicos e terapeutas); e (ii) identificar tendências de conceptualização dessas condições clínicas quanto aos principais frames epistêmicos que procuram explicá-las, e suas virtuais variações, mudanças ou inter-relações. A partir da construção de um corpus em português brasileiro de expressões referenciais metafóricas extraído de dados linguístico-interacionais autênticos de trabalhos acadêmicos de pesquisadores da área de Neurolinguística do Instituto de Estudos da Linguagem, Universidade Estadual de Campinas), bem como de acervos do grupo de pesquisa COGITES (Cognição, Interação e Significação), foram analisadas ocorrências metafóricas em situações de uso e determinadas esferas discursivas (como entrevistas semidirigidas com especialistas e familiares, conversações com indivíduos afásicos e com diagnóstico de doença de Alzheimer, discussões diagnósticas). Com as análises empreendidas até o momento, foi possível observar semelhanças e diferenças na conceptualização da afasia e da Doença de Alzheimer por diferentes atores sociais, bem como de indivíduos diagnosticados. Em geral, a metáfora atua como agente de conhecimento e poderoso recurso linguístico-cognitivo de conceptualização da doença, como já assinalado por muitos autores. Neste estudo, ela indica determinadas tendências de (re)construção de sentidos associados às duas realidades nosológicas como uma (nova) experiência a ser ainda compreendida e emoldurada em termos epistêmicos e sociocognitivos, com impactos e desafios de diversas ordens.