bluuebunny/crossref_metadata_2025_split huggingface dataset:
О ФОРМИРОВАНИИ СПЕКТРАЛЬНОЙ ХАРАКТЕРИСТИКИ ШИРОКОАПЕРТУРНОГО АКУСТООПТИЧЕСКОГО ФИЛЬТРА
Authors: В.Э. ПОЖАР , Е.А. ДЬЯКОНОВ 
Published: October 2024

Рассмотрена проблема построения электронно-перестраиваемого оптического фильтра с синтезируемой спектральной характеристикой. В качестве технической основы взят фильтр на базе дифракции света на акустических волнах, в котором все главные характеристики определяются параметрами фазовой объёмной дифракционной решётки, создаваемой в кристаллической среде акустическим полем, формируемым пьезоизлучателем. Исследована возможность формирования передаточной функции (спектральной характеристики) акустооптического перестраиваемого фильтра путём формирования управляющего сигнала и создания в среде неоднородной динамической фазовой дифракционной решётки. Показано, что в широкоапертурной геометрии акустооптических фильтров, используемой в современных гиперспектральных системах, может быть построена однокоординатная модель акустооптического взаимодействия. Определена связь между параметрами управляющего высокочастотного сигнала, акустической волны, создающей решётку, и спектральной функцией пропускания фильтра. Сформулированы принципиальные ограничения на ширину спектрального окна пропускания. Полученные соотношения позволяют описать работу акустооптического фильтра при произвольном законе амплитудной и частотной модуляций управляющего ультразвукового сигнала при ограниченном коэффициенте передачи. Результаты могут найти применение при проектировании оптических спектральных систем с управляемой функцией пропускания акустооптического фильтра.
The development of acousto-optical tunable filter with a synthesized spectral transmission characteristic is presented. The wide-aperture (wide-angle, tangent) geometry of acousto-optical tunable filters widely used in modern hyperspectral systems is considered. It is shown that they can be described with a single-coordinate model of acousto-optic interaction. The relationships between the driving radiofrequency signal characteristics, the parameters of the acoustic wave forming the grating, and the spectral transmission function of the acousto-optical filter are determined. The fundamental limitations on the spectral transmission function characteristics are revealed. In a linear transmission approximation, the deduced relations describe the operation of an acousto-optical filter with an arbitrary law of amplitude and frequency modulation of the driving signal. The results are applicable for development of acousto-optical spectral systems with a controlled transmission function.
ЭКСПЕРИМЕНТАЛЬНОЕ ОПРЕДЕЛЕНИЕ ФИЛЬТРАЦИОННЫХ СВОЙСТВ ТРЕЩИНОВАТО-ПОРИСТЫХ ГЕОМАТЕРИАЛОВ В РАМКАХ МОДЕЛИ СРЕДЫ С ДВОЙНОЙ ПРОНИЦАЕМОСТЬЮ
Authors: Л.А. НАЗАРОВ , Н.А. ГОЛИКОВ , А.А. СКУЛКИН , Л.А. НАЗАРОВА 
Published: October 2024

Разработан и в лабораторных условиях на слоистых образцах из искусственного геоматериала апробирован экспериментальный метод, позволяющий в рамках модели среды с двойной проницаемостью определить параметры, контролирующие процессы миграции флюидов и пороупругое деформирование трещиновато-пористых породных массивов - трещинную проницаемость k1 и коэффициент массообмена β, а также их зависимость от напряжений σ. Предложена и реализована процедура испытаний: при ступенчато возрастающем нормальном напряжении σ измеряются стационарные расходы Q1(σ) и Q2(σ) в трещиновато-пористом образце квазирегулярной структуры при заданном перепаде давления: по стандартной схеме (Q1) и закрытых трещинах на торце (Q2). Создана математическая модель эксперимента, получено аналитическое решение задачи о стационарной фильтрации: распределение давления в трещинах и матрице, зависимость расходов от σ. Представлен алгоритм для интерпретации данных эксперимента - расчета k1 и β по зарегистрированным расходам Q1 и Q2. Показано, что проницаемость k1 пропорциональна σ -2, а β практически не меняется.
The experimental procedure is developed and tested on a laboratory scale and using layered samples of manmade geomaterials. Within the dual-permeability model, the procedure enables determining parameters that govern fluid flow and poroelastic deformation in fractured porous rock masses, namely, fracture permeability k1 and mass transfer coefficient β, as well as their dependence on stresses σ. The testing procedure is proposed and implemented. In the procedure, under the stepwise increasing normal stress σ, the stationary flow rates Q1(σ) and Q2(σ) are measured in a quasiregular fractured porous sample at the preset pressure difference: using a standard setup (Q1) and in closed end-face fractures (Q2). The mathematical model of the experiment is constructed, and the analytical solution of the problem on stationary flow is obtained: pressure patterns in fractures, and stress-dependence of flow rates. The experimental data interpretation algorithm enables calculating k1 and β by the recorded flow rates Q1 and Q2. It is shown that the permeability k1 is proportional to σ -2, and β remains almost unchanged.
ОБОСНОВАНИЕ СОСТАВА И ПАРАМЕТРОВ ТЕХНОЛОГИИ ЦЕМЕНТНОЙ ЗАКЛАДКИ НА РУДНИКЕ CERRO LINDO, ПЕРУ
Authors: Л.А. ПЕРЕЗ , К.Г. ПЕРЕА 
Published: October 2024

Разработан экспериментальный проект оценки различных технологий подготовки цементной закладочной смеси, проверки ее требуемой прочности и параметров замешивания. Рассмотрены метод определения применимости предлагаемой технологии, сопротивляемость закладки на сжатие, а также результаты оценки стоимости, уровня повышения производительности рудника и безопасности горнодобывающих работ. Установлена пиковая сопротивляемость закладки на сжатие, достигнуто снижение разубоживания руды и повышение устойчивости целиков.
The authors developed a pilot project to test different preparations of cemented rock fill, determine the appropriate mix design, and check necessary mix strength. The article presents the required resistance studies and the research method used to determine feasibility, cost performance and increased mine productivity and safety. The study achieved a resistance peak of 1.6 MPa, reduced dilution of the ore, and increased pillar stability.
ИССЛЕДОВАНИЕ ОСОБЕННОСТЕЙ ДЕЗИНТЕГРАЦИИ РУДНЫХ МАТЕРИАЛОВ ПРИ СУХОМ ИЗМЕЛЬЧЕНИИ В ЦЕНТРОБЕЖНОМ АППАРАТЕ НОВОЙ КОНСТРУКЦИИ
Authors: А.И. МАТВЕЕВ , В.Р. ВИНОКУРОВ 
Published: October 2024

С помощью лабораторной модели вертикального центробежного аппарата установлена зависимость эффективности измельчения рудных материалов с разной твердостью по шкале Мооса. Определены рациональные конструктивные и режимные параметры аппарата для данных руд, которые заложены в основу разработки и проектирования полного пакета рабочей документации на изготовление опытно-промышленного варианта вертикального центробежного измельчителя ВЦИ-12.
Using a laboratory model of a vertical centrifugal breaking machine, the milling efficiency of ore having different Mohs hardnesses is found. The rational structural and operating parameters of the breaking machine are determined for such ore materials. The data are included in the project documentation development for manufacturing a pilot vertical centrifugal breaking machine VTSI-12.
ПРИМЕНЕНИЕ КАТИОННЫХ И СМЕШАННЫХ АНИОННЫХ СОБИРАТЕЛЕЙ ПРИ ФЛОТАЦИОННОМ ОБОГАЩЕНИИ КВАРЦЕВОГО ПЕСКА
Authors: Л. ДА-ВЭЙ , Б. ЦЗУНЬ-ЧЖЕ , Ч. ЮЙ , В. ДИ 
Published: October 2024

Рассмотрено практическое применение катионных и смешанных анионных собирателей для обогащения кварцевого песка методом флотации. Результаты показали, что комбинированное использование додециламина (DDA), олеата натрия (NaOL) и додецилсульфата натрия (SDS) более эффективно по сравнению с применением данных реагентов по отдельности. При использовании смешанного собирателя DDA/NaOL/SDS доля удаления Al2O3 увеличилась на 11.1% относительно собирателя DDA/NaOL и достигла 75.1 %. По сравнению с собирателем DDA/SDS смешанный собиратель значительно повышает долю извлечения кварца и долю удаления примесей. Полученный концентрат обладает достаточным содержанием кварца для практического применения при удовлетворительном извлечении.
This paper studies the effect of using cationic/mixed anionic collectors in the practical application of quartz sand flotation. The combined use of Dodecylamine(DDA)/sodium oleate(NaOL)/sodium dodecyl sulfonate(SDS) is the innovative point of this paper. This experiment used quartz sand from Hanzhong, Shaanxi Province, China. The results showed that the combined use of DDA, NaOL and SDS was better than the single use. Using DDA/NaOL/SDS mixed collector, the removal efficiency of Al2O3 can reach 75.1%, compared with DDA/NaOL mixed collector, the purification effect of Al2O3 can be increased by 11.1%. Compared with DDA/SDS mixed collector, the use of this mixed collector can greatly improve the purification effect and recovery rate. And the quartz concentrate has a good recovery rate in practical application.
МОДИФИКАЦИЯ УГЛЕЙ АПСАТСКОГО МЕСТОРОЖДЕНИЯ С ЦЕЛЬЮ ПОЛУЧЕНИЯ ВЫСОКОКАЧЕСТВЕННЫХ УГЛЕРОДНЫХ АДСОРБЕНТОВ
Authors: К.К. РАЗМАХНИН , И.С. КУРОШЕВ , И.Б. РАЗМАХНИНА 
Published: October 2024

Приведена краткая характеристика сырьевой базы угля в Забайкальском крае. Рассмотрены вопросы термической и гидрохимической модификации углей Апсатского месторождения. Установлена возможность использования карбонизации, парогазовой активации и щелочной обработки ископаемых углей марки СС для повышения их адсорбционной способности. Предложена технология рудоподготовки и переработки углей Апсатского месторождения, включающая дробление, грохочение, карбонизацию и паровую активацию. Приведены характеристики исходных и подвергшихся переработке углей. Установлены основные физико-химические свойства полученных углеродных адсорбентов. Определены параметры модификации ископаемых углей. Представлены результаты компьютерного моделирования активных углеродных сорбентов, основанного на квантово-химическом взаимодействии частиц. Определены направления использования высококачественной сорбционной продукции в технологиях обращения горнопромышленными отходами.
A brief description of coal resources in Transbaikalia is given. The issues of thermal and hydrochemical modification of coal from Apsat deposit are discussed. The usability of carbonization, gas-steam activation and alkaline treatment of low-caking coal for the improvement of coal adsorption capacity is determined. The proposed technology of Apsat coal preparation and dressing includes crushing, screening, carbonization and steam activation. The characteristics of the initial and treated coal are presented. The main physicochemical properties of the produced carbon adsorbents are determined. The coal modification parameters are identified. The computer-aided modeling of activated carbon adsorbents based on the quantum-chemical interaction of particles is described. The application areas of high-quality adsorbents in mining waste treatment are specified.
ПРОГНОЗИРОВАНИЕ ПАРАМЕТРОВ ОСЕДАНИЯ ДНЕВНОЙ ПОВЕРХНОСТИ ПРИ ВЫЕМКЕ ПОЛОГИХ УГОЛЬНЫХ ПЛАСТОВ
Authors: Л. ХУ , Ц. ЦЗЕ , С. ЛЯНЬ , Ч. СЮЭ , Л. СЮЦЯН , Г. СЮЭ 
Published: October 2024

Рассмотрена проблема определения параметров оседания дневной поверхности при отработке угольного пласта методами традиционных вероятностных интегральных решений и усовершенствованного динамического прогнозирования. На основе генетического алгоритма разработана параметрическая модель деформации поверхности, включающая коэффициент оседания и мульду сдвижения. Установлена функция динамического прогнозирования, позволяющая получить полный профиль оседания поверхности и тренд динамического изменения области ведения горных работ. Результаты исследований показали, что динамическое прогнозирование совместно с генетическим алгоритмом обеспечивают достаточно высокую эффективность и точность установления параметров оседания поверхности при отработке угольного пласта. Исследование проводилось на примере горнодобывающего района в провинции Шаньси.
By combining the advantages of InSAR, Probabilistic Integral Method and Genetic Algorithm, an improved method for dynamic prediction of probability integral parameters is proposed to realize subsidence inversion and prediction in insufficient mining. Firstly, InSAR is used to obtain the time series information of surface deformation in goaf. Then, a genetic algorithm-based parameter inversion model is constructed to invert the subsidence parameters such as subsidence coefficient and influence radius. After that, a dynamic prediction function is established to obtain the complete surface subsidence pattern and dynamic change trend of the mining area. Taking a goaf in Shanxi Province as the experimental object, Sentinel-1A(S-1A) image as the data source, combined with PIM and InSAR data, the parameter inversion model is used to successfully obtain the dynamic change process of mining subsidence parameters. The results show that the dynamic prediction function can achieve a certain effect on surface prediction in insufficient mining, and the parameter inversion model based on genetic algorithm has a high inversion accuracy, which provides a basis for surface prediction in insufficient mining.
The fabrication of freestanding complex oxide membranes: Can we avoid using water?
Authors: Park Dae-Sung , Pryds Nini 
Published: October 2024

AbstractRecent advances in fabricating scalable two-dimensional or freestanding functional materials have shown promise for their use in modern silicon-based electronics and future technologies. A growing interest is in creating freestanding complex oxide membranes using new methods like epitaxial lift-off and mechanical exfoliation to enhance their quality and integrity. Despite these advances, it remains challenging to consistently produce high-quality freestanding oxide membranes on a large scale for practical use. This perspective paper provides an overview of release-and-transfer techniques for fabricating freestanding single-crystalline complex oxide layers, which are initially grown epitaxially. Specifically, we systematically explore the advantages and disadvantages of water-assisted exfoliation of freestanding oxide layers, which have been widely adopted using a water-soluble sacrificial layer in recent years. Furthermore, we compare this approach with other methods to navigate future directions in oxide layer transfer technology, considering material selections, fabrication processes, and functionalization strategies.
Graphical abstract
Advancing Community Care and Access to Follow-Up after Acute Kidney Injury Hospitalization
Authors: Pannu Neesh , McBrien Kerry A. , Tan Zhi , Ahmad Nasreen , Bignell Coralea , Benterud Eleanor , Palechuk Taylor , Harrison Tyrone G. , Manns Braden J. , Scott-Douglas Nairne , James Matthew T. 
Published: October 2024

Key Points

A risk-guided intervention improved adherence to processes of care for AKI survivors.Further supports are necessary to improve uptake of processes of care for AKI survivors in primary care.

Background
AKI is associated with development and progression of CKD. Gaps in recommended care for CKD are common after AKI.

Methods
In this randomized controlled trial conducted in Alberta, Canada, we allocated adults hospitalized with Kidney Disease Improving Global Outcomes (KDIGO) stage 2 or greater AKI to a risk-guided, transition of care intervention versus usual practices at the time of hospital discharge. For people in the intervention group, we used a validated risk index to predict risk of severe CKD after AKI. People at low risk (<1%) received patient education alone. People at medium risk received additional clinical guidance, provided to their primary care physician. People at high risk (>10%) were referred to nephrology. The primary outcome was the proportion of patients who received treatment with an angiotensin-converting enzyme inhibitor (ACE-I) or angiotensin II receptor blocker (ARB), statin, and nephrology specialist follow-up within 90 days of discharge.

Results
One hundred fifty-five patients were recruited; the mean (SD) age was 60 (15) years, 91 (60%) were male, and 96 (62%) had eGFR <60 ml/min per 1.73 m2 or urine albumin-creatinine ratio >30 mg/g at discharge. The proportion of participants who received ACE-I/ARB, statin treatment, and nephrologist follow-up was 28% in the intervention group versus 3% in the usual care group (absolute risk difference [RD], 25%; 95% confidence interval [CI], 15% to 36%). The use of ACE-I or ARB in participants with urine albumin-creatinine ratio >300 mg/g or diabetes was greater in the high-risk group with the intervention versus usual care (RD, 37%; 95% CI, 6% to 67%), as was statin use among those with CKD (RD, 30%; 95% CI, 5% to 56%) and nephrologist follow-up for those with sustained eGFR <30 ml/min per 1.73 m2 at discharge (RD, 78%; 95% CI, 56% to 100%). Hyperkalemia was more frequent in the intervention group (RD, 10%; 95% CI, 9% to 19%).

Conclusions
A risk-guided intervention for patients hospitalized with AKI increased recommended processes of care for CKD for high-risk patients after hospital discharge.

Clinical Trial registry name and registration number:
Improving Post Discharge Care after Acute Kidney Injury (AFTER AKI), NCT02915575.
“You Already Know That the Town of Shiraz No Longer Exists”: Reappraising the May 1853 Devastating Earthquake in Shiraz, Iran
Authors: Shafiee Amir Hossein , Saadat Sina 
Published: October 2024

Abstract
The Iranian plateau is located in the middle section of the Alpine-Himalayan seismic belt and has experienced high-magnitude earthquakes during its turbulent history. Shiraz, a historic and prosperous city in southwestern Iran, was heavily damaged by an earthquake on 4 May 1853. An earthquake with an estimated magnitude of 6.2 shook the city of Shiraz and killed at least 9000 people. This earthquake was definitely the deadliest one in the country’s nineteenth century. In the present article, this earthquake is reappraised by reviewing and comparing the available and original published resources. The territory of the historic region of the city and the landmark buildings damaged in the earthquake are identified using satellite imagery from Google Earth. Complete details of the construction method and the material used at the time of the earthquake are also presented using the information available in the literature and from a personal visit by the authors.
Pregnancy-Related Mortality Disparities During the COVID-19 Pandemic
Authors: Rowley Diane L. , Anyanwu Kelechukwu , Crosby Alexander , Phillips Kiwita S. , Hutchins Sonja 
Published: October 2024

Objectives. To compare pregnancy-related mortality ratios (PRMRs) associated with COVID-19 by race/ethnicity, by region of residence, and in states with and without Medicaid expansion. Methods. We used 2020–2021 data from the US Centers for Disease Control and Prevention’s Wide-Ranging Online Data for Epidemiologic Research in our analysis. We stratified PRMRs by race/ethnicity, census regions, and Medicaid expansion and nonexpansion states. Results. The 2020–2021 PRMR was 40.3 per 100 000 live births. American Indian/ Alaska Native pregnant people had the greatest PRMR, followed by non-Hispanic Blacks and non-Hispanic Native Hawaiians/other Pacific Islanders. PRMRs associated with COVID-19 in the southern region were at least 2 times higher than in other regions and were highest for all pregnant people in the various racial/ethnic groups. PRMRs associated with COVID-19 were lower in Medicaid expansion states than in nonexpansion states. Conclusions. The US COVID-19 epidemic exacerbated racial and ethnic disparities in pregnancy-related mortality. Public Health Implications. The alarming increase in disparities among racial and ethnic pregnant people during the COVID-19 pandemic underscores the need to address social determinants of health at the structural level. ( Am J Public Health. 2024;114(S9): S723–S730. https://doi.org/10.2105/AJPH.2024.307814 )
Research Fellowships for Unmatched Orthopaedic Applicants: What Can They Expect?
Authors: Ponce Robert B. , Maxson Ridge , Wrenn Sean P. , Morris Cade , Louer Craig , Mitchell Phillip M. 
Published: October 2024

Introduction:
Unmatched orthopaedic surgery applicants often pursue research fellowships to strengthen their residency applications. The aims of this study were to (1) report the trend of the number of orthopaedic research fellowships offered online between 2019 and 2024, (2) describe the characteristics of research fellowships available to unmatched applicants, and (3) assess the quality of support received by unmatched applicants who complete research fellowships.

Methods:
An online orthopaedic forum was retrospectively reviewed to identify job postings for medical student research fellowships in the 2019 to 2020 and 2024 to 2025 academic years. Information regarding expected mentorship and funding described in these postings was collected. Surveys were administered electronically to assess the funding received and perceived levels of mentor advocacy among unmatched orthopaedic applicants who had completed research fellowships between 2022 and 2024.

Results:
The number of orthopaedic research fellowships offered online increased by 165% (54-143) between 2019 and 2024, corresponding with a rate of 18 new fellowships offered per year. For the 2024 to 2025 academic year, 80 fellowships (56%) were available to unmatched applicants. The minority of online postings for these positions described support in the match (49%), the specific amount of funding offered (36%), a successful match track record for prior fellows (20%), and contact information of current or prior fellows (11%). The average amount of publicly offered funding was $32,537 (range, $18,000 to $65,000). Among 31 unmatched applicants who responded, the average amount of funding received was $38,180 ± 11,719. Most respondents rated advocacy from research fellowship mentors as high (53%) or moderate (40%), met with their mentors weekly or biweekly (63%), and received feedback on their residency applications (83%).

Conclusion:
Over the past 5 years, the number of orthopaedic research fellowships available to unmatched applicants has more than doubled. Although perceived advocacy was rated highly by most unmatched research fellows, fewer than half of the online postings for these positions provided details regarding financial compensation and support during the match cycle. Improvements in transparency related to fellowship characteristics are warranted to assist unmatched orthopaedic applicants in making informed decisions when pursuing research years between match cycles.

Level of Evidence:
N/A.
Negative News and Hate Speech On Prabowo – Gibran in the 2024 Presidential Election on Metro TV News
Authors: Savitri Anisya Novi , Sufyanto Sufyanto 
Published: October 2024

General Background: The rise of social media and online news platforms has transformed public interaction, making comments a vital indicator of public sentiment towards political figures. Specific Background: This study focuses on the negative news and hate speech surrounding presidential candidates Prabowo Subianto and Gibran Rakabuming Raka during the 2024 Presidential Election, particularly in the comment sections of Metro TV News. Knowledge Gap: Despite the significance of social media interactions in shaping public perception, limited research has explored how negative news and hate speech influence public views of political candidates in this context. Aims: This study aims to analyze the impact of negative news and hate speech regarding Prabowo and Gibran in the comment section of Metro TV News' YouTube channel. Results: Utilizing a qualitative descriptive method, the findings reveal that public perception of Prabowo and Gibran is significantly affected by negative comments and hate speech, reflecting broader societal controversies surrounding their candidacy. Novelty: This research provides a comprehensive analysis of how digital comment sections contribute to public discourse about political figures.
Highlights:

Social media comments are crucial indicators of public sentiment.
Public perception is significantly influenced by negative comments and hate speech.
Research underscores the need for effective media policies regarding online interactions.

Keywords: Negative News, Hate Speech, Public Sentiment, Political Candidates, Social Media