bluuebunny/crossref_metadata_2025_split huggingface dataset:
ИССЛЕДОВАНИЕ УДАРНО-ИНДУЦИРОВАННОГО ПЫЛЕНИЯ С ИСПОЛЬЗОВАНИЕМ СИНХРОТРОННОГО ИЗЛУЧЕНИЯ
Authors: М.В. АНТИПОВ , А.Б. ГЕОРГИЕВСКАЯ , В.А. ОГОРОДНИКОВ , А.Л. МИХАЙЛОВ , И.А. СПИРИН , Д.А. КАЛАШНИКОВ , А.А. УТЕНКОВ , И.В. ЮРТОВ , О.Б. СОГРИНА , А.В. ФЕДОСЕЕВ , К.А. ТЕН , Э.Р. ПРУУЭЛ , А.О. КАШКАРОВ , И.А. РУБЦОВ 
Published: November 2024

При исследовании процесса ударно-индуцированного пыления, особенно когда потоки частиц движутся в газе или вызваны несколькими ударными волнами, необходимо получать экспериментальные данные о динамике изменения плотности в этих потоках в различные моменты времени начиная от выхода ударной волны на свободную поверхность образца. Для проведения таких измерений был использован метод скоростной рентгенографии с помощью синхротронного излучения. В экспериментах на свободную поверхность образцов из олова, имевших шероховатость Rz 5, 20 и 60, выходили одна или, последовательно, две ударные волны с давлением ≈40 ГПа. Разгрузка ударной волны происходила в вакуум или газовую среду (воздух, гелий, азот) с начальными давлениями 1 ÷ 8 атм. В работе приведены постановки экспериментов и полученные в экспериментах данные по динамике изменения плотности в пылевых потоках, образовавшихся под действием одной и двух последовательных ударных волн после их выхода на свободную поверхность образцов в вакууме и газовых средах.
When studying the process of shock-induced dusting, especially when particle fluxes move in a gas or are caused by several shock waves, it is necessary to obtain experimental data on the time history of density in these fluxes starting from the arrival of the shock wave at the free surface of the sample. In this work, such measurements were performed using high-speed radiography with synchrotron radiation. In the experiments, one or two successive shock waves with a pressure of ≈40 GPa arrived at the free surface of tin samples with a roughness Rz 5, 20 and 60. Shock-wave unloading occurred in vacuum or gas (air, helium, nitrogen) at initial pressures 1–8 atm. The paper presents the experimental setups and experimental data on the density dynamics in dust fluxes formed upon exposure to one and two successive shock waves after their arrival at the free surface of samples in vacuum and gas media.
О МОДИФИКАЦИИ КОМБИНИРОВАННЫХ КУМУЛЯТИВНЫХ ОБЛИЦОВОК ПОЛУСФЕРА - ЦИЛИНДР ДЛЯ РАСШИРЕНИЯ ДИАПАЗОНА СКОРОСТЕЙ ПОЛУЧАЕМЫХ КОМПАКТНЫХ ЭЛЕМЕНТОВ
Authors: С.В. ФЕДОРОВ , И.А. БОЛОТИНА 
Published: November 2024

Используемые в настоящее время кумулятивные заряды с облицовкой комбинированной формы полусфера — цилиндр позволяют получать компактные стальные элементы со скоростями на уровне 6 км/c. На основе численного моделирования в рамках двумерной осесимметричной задачи механики сплошных сред рассмотрены возможности модификации облицовок полусфера — цилиндр для расширения диапазона скоростей получаемых компактных элементов. Моделирование проводилось применительно к кумулятивному заряду диаметром 100 мм с облицовкой из меди. Струеобразующей части облицовки придавалась дегрессивная (уменьшающаяся от вершины к основанию) толщина при полусферической либо полуэллипсоидальной форме ее наружной поверхности и при полуэллипсоидальной либо полусуперэллипсоидальной форме внутренней поверхности. В результате расчетов были подобраны геометрические параметры комбинированных облицовок для формирования компактных элементов максимально возможной массы со скоростями в диапазоне 5 ÷ 9.5 км/с. Для элемента со скоростью около 9.5 км/c масса составляла около 5 г.
The currently used shaped charges with combined hemisphere–cylinder liners allows obtaining compact steel elements with velocities of about 6 km/s. In this work, the possibility of modifying hemisphere–cylinder liners to expand the velocity range of the resulting compact elements was investigated by numerical simulation within the framework of the two-dimensional axisymmetric problem of solid mechanics. The simulation was carried out for a 100 mm diameter shaped-charge charge with a copper liner. The jet-forming part of the liner had a degressive (decreasing from top to bottom) thickness, a hemispherical or semi-ellipsoidal shape outer surface, and a semi-ellipsoidal or semi-superellipsoidal inner surface. As a result of the calculations, the geometric parameters of combined liners to form compact elements of maximally possible mass with velocities of 5–9.5 km/s were selected. For an element with a velocity of about 9.5 km/s, the mass was about 5 g.
СТРУКТУРА НЕУСТОЙЧИВОГО ДЕТОНАЦИОННОГО ФРОНТА В ЖИДКИХ ВЗРЫВЧАТЫХ ВЕЩЕСТВАХ
Authors: В.А. СОСИКОВ , С.И. ТОРУНОВ , Д.Ю. РАПОТА , В.М. МОЧАЛОВА , А.В. УТКИН , С.А. КОЛДУНОВ 
Published: November 2024

Проведены эксперименты по исследованию неустойчивости детонационных волн в смесях нитрометана, тетранитрометана и ФИФО с инертными разбавителями посредством регистрации свечения детонационного фронта скоростной восьмиканальной шестнадцатикадровой электронно-оптической камерой НАНОГЕЙТ-22/16. В области неустойчивости детонации зарегистрировано неоднородное свечение детонационного фронта, которое связывается с турбулентным течением в зоне реакции. Формирование ячеистых структур с реакцией взрывчатого вещества в косых и поперечных волнах в исследованных составах не наблюдалось.
Experiments are conducted to study the instability of detonation waves in mixtures of nitromethane, tetranitromethane, and FIFO with inert diluents by recording the detonation front glow with a NANOGATE-22/16 high-speed eight-channel sixteen-frame electron-optical camera. In the detonation instability region, the detonation front exhibits a nonuniform glow, which is associated with a turbulent flow in the reaction region. The formation of cellular structures with the reaction of the explosive in oblique and transverse waves is not observed in the compositions studied.
ОТКОЛЬНОЕ РАЗРУШЕНИЕ СТАЛИ 12Х18Н10Т, ИЗГОТОВЛЕННОЙ ПО ТЕХНОЛОГИИ СЕЛЕКТИВНОГО ЛАЗЕРНОГО ПЛАВЛЕНИЯ
Authors: А.М. ПОДУРЕЦ , И.В. ПИКУЛИН , В.Г. СИМАКОВ , Т.О. СКЛЯДНЕВА , И.А. ТЕРЕШКИНА , М.И. ТКАЧЕНКО , И.Р. ТРУНИН , Е.Е. ШЕСТАКОВ , И.С. ГНУТОВ 
Published: November 2024

Приведены результаты цикла исследований по определению динамических прочностных характеристик образцов, изготовленных по технологии селективного лазерного плавления порошков на основе стали 12Х18Н10Т, и их сравнение со свойствами стали 12Х18Н10Т, полученной по традиционной технологии горячекатаного проката, при ударно-волновом нагружении в диапазоне давлений сжатия 3 ÷ 7 ГПа. Показано, что образцы из стали, изготовленные по технологии селективного лазерного плавления, имеют большую сопротивляемость кратковременному растяжению, возникающему в результате взаимодействия встречных волн разгрузки, по сравнению с горячекатаной сталью 12Х18Н10Т.
This paper presents the results of a series of studies to determine the dynamic strength characteristics of samples manufactured using selective laser melting technology of 12Kh18N10T steel powders and compares them with the properties of 12Kh18N10T steel obtained by traditional hot rolling under shock-wave loading in a compression pressure range of 3–7 GPa. It is shown that the steel samples manufactured using selective laser melting technology have greater resistance to short-term tension resulting from the interaction of counter-current unloading waves compared to the hot-rolled 12Kh18N10T steel.
ЧИСЛЕННОЕ МОДЕЛИРОВАНИЕ ФОРМИРОВАНИЯ КУМУЛЯТИВНОЙ СТРУИ ИЗ ВРАЩАЮЩЕГОСЯ КУМУЛЯТИВНОГО ЗАРЯДА
Authors: С.С. РАССОХА 
Published: November 2024

Представлены результаты численного моделирования функционирования вращающихся кумулятивных зарядов. Продемонстрировано отсутствие влияния скорости радиального расширения высокоскоростных полых цилиндрических ударников, которые имитируют элемент кумулятивной струи, на глубину их проникания. Проведен численный анализ процесса растяжения вращающегося растягивающегося металлического цилиндра (струи) с гармоническим профилем боковой поверхности. Оценено влияние различных параметров, в том числе угловой скорости струи, на ее сплошность в осевом и радиальных направлениях. Предложена зависимость для оценки коэффициента предельного удлинения вращающейся кумулятивной струи. Сравнение результатов расчетов с экспериментальными данными демонстрирует удовлетворительное согласование.
This paper presents the results of numerical simulation of the operation of rotating shaped charges. The results show the that the velocity of radial expansion of high-speed hollow cylindrical projectiles simulating shaped-charge jet elements has no influence on their penetration depth. Numerical analysis was performed to study the stretching of a rotating stretchable metal cylinder (jet) with a harmonic lateral surface profile. The influence of various parameters, including the angular velocity of the jet, on its continuity in the axial and radial directions was evaluated. A relation for estimating the ultimate elongation coefficient of a rotating shaped-charge jet is proposed. Comparison of calculation results with experimental data shows that they are in satisfactory agreement with each other.
СКОРОСТЬ ДЕТОНАЦИИ МОДЕЛЬНЫХ ВЗРЫВЧАТЫХ СМЕСЕВЫХ СОСТАВОВ И ЕЕ ЗАВИСИМОСТЬ ОТ СОДЕРЖАНИЯ КОМПОНЕНТОВ И ДИАМЕТРА ЗАРЯДА
Authors: А.А. МАТВЕЕВ , В.Н. КУЛИКОВ , А.Н. ОСАВЧУК , А.Р. РЯБОКОН , Н.И. ШИШОВ 
Published: November 2024

Приведены результаты экспериментально-расчетных исследований влияния ряда факторов на скорость детонации модельных взрывчатых смесевых составов: типа взрывчатого вещества и полимерного связующего, содержания и размера частиц компонентов (взрывчатого вещества, алюминиевого порошка, окислителя), диаметра заряда. Установлено, что скорости детонации взрывчатого вещества (ВВ) — окфола и смесевых составов на активном связующем при содержании ВВ 60 ÷ 80 % (СL-20, октоген) близки между собой. Наиболее заметное снижение скорости детонации наблюдается для смесевых составов с массовым содержанием алюминия более 20 % при повышении концентрации окислителя от 6 до 30 %. Увеличение размера частиц взрывчатого вещества и окислителя приводит к некоторому росту экспериментальной скорости детонации взрывчатого состава. Предельный диаметр детонации смесевых составов на основе активного связующего составляет 40 ÷ 80 мм в зависимости от содержания компонентов.
This paper presents the results of experimental and computational studies of the influence of a number of factors on the detonation velocity of model mixed explosive compositions: type of explosive and polymer binder, content and particle size of components (explosives, aluminum powder, oxidizer), and charge diameter. It has been found that the detonation velocities of the explosive okfol and mixed compositions based on an active binder with an explosive content of 60–80 % (CL-20, HMX) are close to each other. The most marked decrease in detonation velocity is observed for mixed compositions with a mass content of aluminum higher than 20% with increasing oxidizer concentration from 6 to 30%. An increase in the particle size of the explosive and oxidizer leads to an increase in the experimental detonation velocity of the explosive composition. The critical detonation diameter of mixed compositions based on the active binder is 40–80 mm depending on the content of components.
Complejidad en el concepto de comunidad en estudios académicos en ciencias sociales: reflexiones y desafíos
Authors: Uribe Lopera Lucas , González Montero Sebastian Alejandro , Vinaccia Alpi Stefano , Montoya Tomás 
Published: November 2024

El concepto de comunidad es ampliamente utilizado en las ciencias sociales, perosu uso polisémico y general puede limitar la comprensión de realidades socialescomplejas. Este artículo presenta una reflexión sobre el concepto de comunidad a partir de un análisis sistemático de su uso en la literatura académica de 2022. Se priorizaron 2430 artículos académicos y se analizaron 7 categorías conceptuales donde se evidencia una diversidad de enfoques y perspectivas, pero también una falta de claridad conceptual y una falta de atención a la simetría de los actores humanos y no humanos en la construcción de comunidades.
Descriptive Evaluation in Outpatient Follow-up of Direct LDL-C in Patient with Elevated Triglycerides and Diabetes
Authors: Bennett Monica , Buzzard Lyndsey , Presnell Erica , Ofei-Dodoo Samuel , Newell Bradley 
Published: November 2024

Introduction. An annual fasting lipid panel (FLP) is recommended for patients with diabetes, and more frequent testing is advised when escalating cholesterol-lowering therapy. However, the calculated low-density lipoprotein cholesterol (LDL-C) using the Friedewald equation may be inaccurate when triglycerides (TG) are ≥400 mg/dL. In such cases, providers are required to order a separate direct LDL-C assay to confirm results, which increases the risk of overlooking the need for therapy intensification.
Methods. The authors conducted a retrospective chart review across 13 outpatient clinics within a single health system over a five-year period. Patients aged 40-75 years, diagnosed with diabetes, and having at least one invalid LDL-C result were included. The primary outcome assessed the frequency of ordering a direct LDL-C assay within 7 days following an invalid LDL-C.
Results. Among 1364 unique cases with invalid FLPs, 97 (7.1%) met the primary outcome. No significant association was identified between provider type and the likelihood of ordering a direct LDL-C. Therapy escalation was not significantly impacted by a direct LDL-C (14.1% direct vs 16.3% indirect) (p=0.6269) or provider type (16% MD/DO, 14.9% PA, 20.4% APRN) (p=0.6871).
Conclusions: Our findings indicate that the current practice of manually verifying invalid LDL-C results at this institution may overlook necessary therapeutic intensification to meet guideline-based goals. The addition of a reflex direct LDL-C assay may enhance this process.
Type 1 Diabetes Mellitus in Movies: The Hollywood Effect
Authors: Sandid Lana , Kallail Ken James , Moore Justin , Ablah Elizabeth 
Published: November 2024

Introduction. Type 1 diabetes mellitus (T1D) is one of the most common chronic diseases with childhood onset. Cinematic films and movies have the capability to reach populations worldwide and effect their concept of this disease. This research examined the accuracy of these movies depicting T1D from childhood into adulthood.
Methods. We conducted an internet search of several databases that resulted in a list of 39 movies from 2000 to 2022 with characters that had diabetes. We ultimately assessed 13 fictional movies that dealt with management of disease, character development, access to care, and complications.
Results. Movies portray severe but rare diabetes manifestations such as comas. They emphasize access to basic diabetes supplies and cost of care. Only starting in 2020, a continuous glucose monitor (CGM) and insulin pumps are shown. Female characters are presented as resilient and unaffected by the struggles of their T1D.
Conclusions. This sample of fictional movies portrays extreme T1D symptoms and mostly outdated technology for monitoring and treatment. It would be beneficial if future movies reflected the advances in closed-loop CGM/insulin pumps. It is important for clinicians to be aware of how the movie industry is presenting the disease to their patients. Clinicians can use popular movies to start difficult discussions with their patients about topics pertinent to the comprehensive care of T1D.
Study on the mechanism of hyperoside in affecting the biological progression and radiosensitivity of esophageal carcinoma by modulating the STAT3/AKT/ERK pathway
Authors: Yin Hongmei , Yuan Zhongxia , Han Xiumei , Jiang Die , Li Duojie , Song FengLi 
Published: November 2024

Hyperoside (HYP) exhibits diverse pharmacological effects and holds potential for enhancing chemotherapy sensitivity. However, few studies have reported the impact of HYP on the malignant progression of esophageal carcinoma (EC) and its sensitivity to radiotherapy. The impact of HYP on the viability of EC cells (TE-1 and KYSE-150) was assessed using Cell Counting Kit-8 (CCK-8) assays. The biological characteristics and radiosensitivity of EC cells following HYP treatment were evaluated through clone formation experiments, flow cytometry, scratch wound-healing assays, and transwell migration and invasion assays. Western blot analysis was performed to determine the levels of proteins associated with cell death and epithelial-mesenchymal transition (EMT), as well as to explore whether HYP interferes with the radiosensitivity of EC cells via the STAT3/AKT/ERK pathways. Finally, a subcutaneous graft tumor model was constructed to investigate the effects of HYP and X-ray treatments on in vivo tumor growth. The findings indicated a dose-dependent decrease in the survival rate of KYSE-150 and TE-1 cells following HYP treatment. HYP treatment also inhibited cell proliferation, invasion, migration, and EMT, while increasing the apoptotic rate and radiosensitivity of the cells. Notably, HYP suppressed the malignant progression of EC and enhanced radiosensitivity via the STAT3/AKT/ERK pathway. Moreover, HYP impaired the growth of EC tumors in mice, with the combined HYP and X-ray treatment exerting a stronger inhibitory effect. In conclusion, HYP increases the radiosensitivity of esophageal carcinoma cells, offering considerable promise for application in the clinical treatment of EC.
Geomorphological Approach to the Charnockite Problem
Authors: Radhakrishna B. P. 
Published: November 2024

Abstract
Charnockitic rocks, although formed at great depths, are found at the present day occupying the highest plateaus and peaks in the Peninsula, Evidences are put forward to indicate that the present position of charnockites is the result of faulting and repeated uplift. It is thought that 'intrusion' into upper levels of the earth's crust would destroy the characteristic features of deep seated plutonic metamorphism shown by charnockites. The continued presence of these characteristics without change irldicates that the present position of charnockites is the result of uplift and not intrusion. Charnockites are present only in regions of repeated uplift.
The Stratigraphy of the Muth Quartzite of the Himalayas
Authors: Gupta V. J. 
Published: November 2024

Abstract
The paper reviews the distribution, lithology and fauna of the Muth Quartzite in the Himalayas. In the light of some interesting fossil finds in these quartzites from the Upper Spiti Valley and Anantnag District of Kashmir, Devonian age for the fossiliferous portion of the quartzites is firmly established. The discovery of Psilophyton princeps, find of fish remains in the dark calcareous shales at the base of the quartzite situated south west of the Margan Pass, and occurrence of well preserved conodont fauna from the siliceous limestone near Lutherwan in the Anantnag District, Kashmir, suggest a lower or middle Devonian age for the base of the quartzites. A brief discussion of the Devonian palaeogeography of the region is also given.
A Sedimentary Petrographic Study of the Alwar Rocks Near Debari, Udaipur (Rajasthan)
Authors: Shukla R. T. , Sharma B. L. 
Published: November 2024

Abstract
The paper is an attempt to study so ancient rocks as the Alwars from a sedimentary petrographic point of view.
The Alwar series of rocks at Debari near Udaipur (Rajasthan) comprise basal conglomerates, arkoses, grits, schists, quartzites, slates and phyllites in chronological sequence from bottom upwards. The Alwars rest unconformably over the Aravalli schists and phyllites, and are inverted in their stratigraphic sequence. The conglomerate consists of pebbles of granite, tourmaline, quartzite, vein quartz and fragments of phyllite and schist embeddl:d in a fine grained quartzo-felspathic matrix. The pebbles exhibit a wide variation in size and shape. A few pebbles are sheared to some extent. Shearing appears to be postdepositional in origin. Elongated shape of the pebbles seems to be inherited from the nature of weathering of the source rocks and post-depositional tectonic stretching.
Sedimentary structures like current and graded bedding are present in arkoses and quartzite. Statistical parameters of size distribution of these clastics, namely, the median, sorting coefficient, skewness and kurtosis are computed and interpreted.
Heavy grain residue obtained from the rocks under study contains zircon, rutile, ilmenite, kyanite, andalusite, sillimanite and fluorite. The source rocks of these sediments appear to be of mixed origin comprising orthoquartzites. low to high grade metamorphics and granite.
Ore Microscopic, X-Ray and Trace Elemental Studies of a few Iron Ores from South India
Authors: Anjaneya Sastry C. , Krishna Rao J. S. R. 
Published: November 2024

Abstract
Samples of iron ore from Kemmangundi (Mysore), Ongole (A. P.) and Salem (Tamilnadu) are investigated by ore microscopic, X-ray and spectrographic methods, and the results are presented.
Under the ore microscope, primary relict magnetite and secondary hematite are observed in ores of Kemmangundi. Magnetite is primary and hematite is secondary in ores from Ongole and Salem. X-ray study of Ongole and Salem ores does not indicate the presence of maghemite, and it is concluded that original magnetite is oxidized to hematite. The trace elements in ores of Kemmangundi are mainly Al and Ti, which are typical of residual hydrolysate sediments. There is depletion of elements like Si, Ca and Mg due to solution and leaching. The ores from Ongole and Salem are deficient in elements like Mn, Ni, Ti, Co, Cr, and V (Ferride group of elements), which feature is characteristic of metasediments.
The Structure of Arsikere Granite, Mysore State
Authors: Subrahmanya K. R. , Naganna C. 
Published: November 2024

Abstract
Structural study of the Arsikere granite and the surrounding gneisses, has revealed that the former is intrusive into the latter. The planar and linear elements indicate that the granite was emplaced through injection of viscous magma in a north-easterly direction. The possibility that the Arsikere and Banavar granites form cupolas of a single batholith is also indicated.
A Review of the Tectonic and Geological History of Eastern India in Terms of 'Plate Tectonics' Theory
Authors: Desikachar S. V. 
Published: November 2024

Abstract
The distinctive characteristics and independent evolution until Neogene times of the Bengal basin situated on the Indian plate and the Assam-Arakan basin situated on the Burmese plate, are described. The Indian plate during this period was simultaneously in the process of a northerly rafting movement according to the theory of plate tectonics. Arguments are put forth in support of the Assam-Arakan basin over-riding the Bengal basin towards west, and the Upper Assam shelf towards north-west simultaneously during Neogene times, as a result of the two plates coming together and consequent orogeny. The stabilist concept of geosynclinal theory for the formation of folded belts, according to which the Bengal basin and the Assam-Arakan basin have all along been considered by almost all previous workers to be forming a single geosyncline from their inception stage, has been questioned. The mobilist concepts involving plate tectonics theory have been introduced while broadly reviewing the tectonics and geological history of eastern India.
Some Aspects of the Geology and Geochemistry of Vengad Conglomerate, Cannanore District, North Kerala
Authors: Ravindra Kumar G. R. , Narayanaswamy  
Published: November 2024

Abstract
A conglomerate horizon separates the Early Precambrian high-grade supracrustals from the low-grade supracrustal rocks in north Kerala. The conglomerate consists dominantly of quartzite pebbles. In addition quartz. granite and quartz-mica schist pebbles are also recognised. Tbe matrix is of arkosic composition. The petrochemistry of pebbles and matrix indicate a dominant sialic provenance. The presence of quartzite pebbles suggests a cycle of sedimentation prior to the deposition of Vengad conglomerates.