bluuebunny/crossref_metadata_2025 huggingface dataset:
Urgent Cardiosurgical Treatment of a Military Servant with a Moving Thrombus in the Area of the Left Ventricular Apical Aneurysm (Case Report)
Authors: Gogayeva Olena K. , Nudchenko Oleksandr O. , Malysheva Tetiana A. , Shnaider Liudmyla M. , Tertychna Anastasiia S. , Stavinchuk Victoria I. , Rudenko Serhii A.
Published: April 2024

Against the background of military operations, post-traumatic stress disorder, the progression of the atherosclerotic process is observed, which can lead to myocardial infarction even in young people. Left ventricular aneurysm (LVA) in military personnel is the result of untimely revascularization of an infarct-related artery, gunshot wound to the heart, chest trauma, etc. The presence of a dyskinetic area promotes formation of blood clots in the LVA cavity. LVA thrombosis is associated with an increased risk of embolism, ischemic stroke, and death.

Case description. A 37-year-old military servant A. was urgently hospitalized to the National Amosov Institute of Cardiovascular Surgery of the National Academy of Medical Sciences of Ukraine with a mobile thrombus in the area of LVA, size 4.5 x 3 cm, with signs of lysis and a threat of separation according to echo data. The patient was found to suffer Q-wave myocardial infarction 5 months ago; at the time of examination there was decompensation of the condition and a decrease in the left ventricular contractility to 34%. The patient underwent urgent operation: on-pump coronary artery bypass grafting, LVA resection with thrombectomy. The duration of the operation was 7 hours, the aortic cross-clamp time was 53 minutes, the perfusion time was 93 minutes, the blood loss was 500 ml. The postoperative period was uneventful. The patient was discharged on the 7th day with improvement, the ejection fraction was 40%.

Conclusion. The lack of an opportunity to conduct timely electrocardiography and echo for military personnel with acute chest pain reduces the chances of diagnosis and treatment of myocardial infarction within the therapeutic window, which leads to the occurrence of complicated forms of coronary heart disease, namely LVA. Echo is of crucial importance in deciding on emergency cardiac surgery for thrombosed LVA.
Bidirectional Cavapulmonary Anastomosis as a Stage of Hemodynamic Correction of Hypoplastic Right Heart Syndrome
Authors: Imanov Elnur , Dziuryi Ivan V. , Truba Iaroslav P. , Perepeka Iryna A. , Lazoryshynets Vasyl V.
Published: April 2024

Hypoplastic right heart syndrome (HRHS) is a rare cyanotic congenital heart disease with a wide spectrum of cardiac anomalies characterized by underdevelopment of the right heart. Survival and type of surgery in these patients directly correlate with structural anatomy and circulatory physiology.

The aim. To evaluate perioperative characteristics in patients with HRHS, immediate and long-term results after bidirectional cavapulmonary anastomosis.

Materials and methods. In the period from 1996 to 2022, 80 patients with HRHS underwent hemodynamic correction at the National Amosov Institute of Cardiovascular Surgery. All the patients were divided into three age groups: group I (n = 18) with patients who underwent hemodynamic correction under the age of 1 year, group II (n = 33) including patients who underwent surgery between the ages of 12 and 36 months, and group III (n = 29) comprised of those operated at the age older than 3 years.

Results. In the early postoperative period, 5 (6%) deaths were reported among the patients of three groups: 3 in group I and 2 in group III. There were no deaths among patients of the group II. Median durations of mechanical ventilation, total exudation, hourly and total sympathomimetic support, hospital stay were significantly lower in group II in contrast to the comparison groups. An uncomplicated course of the early postoperative period was observed in 59 (74%) patients.

Conclusions. In patients with HRHS, the determination of treatment tactics requires a careful approach, especially in newborns and infants. The implementation of hemodynamic correction shows significantly better results in early childhood.
Investigation of an automobile air-conditioner with a liquid-suction heat exchanger using R134a and R1234yf
Authors:   Department of Mechanical Engineering, Collage of Engineering, University of Baghdad, 10071 Baghdad, Iraq, Ansam Akeel Mohammed , S. Sarsam Wail ,   Department of Mechanical Engineering, Collage of Engineering, University of Baghdad, 10071 Baghdad, Iraq
Published: April 2024

Air-conditioning systems (ACs) are essential in hot and humid climates to ensure acceptable ambient air quality as well as thermal comfort for buildings users. It is essential to improve refrigeration system performance without increasing the effects of global warming potential (GWP) and ozone depletion potential (ODP). The main objective of this study is to evaluate the performance of an air conditioning system that operates with a liquid suction heat exchanger (LSHX) through implementing refrigerants with zero OPD and low GWP (i.e., R134a and R1234yf). Liquid suction heat exchanger (LSHX) was added to an automobile air conditioning system (AACS).When Liquid suction heat exchanger was added to the cycle, primary results indicated that an enhancement in the cycle coefficient performance (COP) by 25.2 %and 17.3% for R134a and R1234yf respectively, and decreasing in mass flow rate of the refrigerants used (m ̇_r). Also increasing in refrigeration effect (RE) by 4.2% and 2.3% for R134a and R1234yf respectively. Presence of LSHX caused increasing in heat rejected by condenser (Qcond.) according to increasing in sub-cooling degree and decreasing in compressor work (Wcomp.), increasing in condenser exergy destruction (X. des. cond.) and thermostatic expansion device (TXV) exergy destruction, but decreasing in compressor and evaporator. Summary of previous experimental and numerical studies is presented as well.
The influence of micro-channel shape filled by nanofluid on heat transfer characteristics: Numerical and experimental study
Authors:   Department of Mechanical Engineering, College of Engineering, Thi-Qar University, Thi-Qar, Iraq, Natheer Tuaima Abbas , J. Shkarah Ahmed , D. Salman Mohammed
Published: April 2024

The integration of nanofluid effects and channel shape effects in a heat sink, which exhibits both variable and constant cross-section, has gained significant traction as an efficient cooling method for thermal devices, particularly microelectronic devices. This research presents an experimental and numerical analysis to compare the performance of microchannel heat sink designs (straight, zigzag, wavy, and circular cavities). In addition, the study dealt with the use of pure water and nanofluid (CuO-H2O) with volumetric concentrations of (0.01, 0.02, and 0.03) as coolants. COMSOL Multiphysics was used for numerical analysis to simulate and solve the problem of fluid and heat flow in 3D. The bottom wall of the four microchannels is subjected to a steady heat flux of 170 kW/m2. The simulations were only performed within the laminar domain, encompassing a spectrum of Reynolds numbers ranging from 50 to 150. The influence on the microchannel's wall temperature, thermal resistance, pressure drop, and friction factor is exhibited. According to the findings, the wavy and zigzag microchannel heat sink cooled by nanofluid displays higher performance in terms of heat transmission and dissipation in comparison to the heat sink that was cooled by distilled water. as evidenced by a 12% increase in mussel number at volume concentrations of 0.03%.
Improving the efficiency of the automobile engine cooling system using hybrid MWCNT/Al2O3 as nanofluids
Authors:   Department of Chemical Engineering, Faculty of Engineering, University of Al-Qadisiyah, Al-Diwaniya 58002, Iraq, A. Mohammed Ahmed , I. Dawood H. ,   Department of Chemical Engineering, Faculty of Engineering, University of Al-Qadisiyah, Al-Diwaniya 58002, Iraq, N. Onyeaka Helen ,   2 School of Chemical Engineering, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK
Published: April 2024

The aim of this research was to increase the engine car efficiency by adding an innovative material called hybrid MWCNT/Al2O3 nanofluids. A volume ratio instance for investigations is 0.05 MWCNT mixed with 0.05 Al2O3 in distilled water (DW). The experimental temperature setup was in the range from 50 °C to 70 °C. The results demonstrate that as temperatures increase, specific heat and thermal conductivity increase significantly, while viscosity and density gradually decrease. At 70 °C, the highest thermal conductivity of 1.143 W/m.K was achieved in the presence of hybrid MWCNT/Al2O3 nanofluids. Furthermore, it was found that the correlation coefficient for thermal conductivity is 97.06% R2.
Effect of flame retardants and 1% stabiliser on thermal decomposition and physics properties of thermoplastic polymer due to TGA and DTA tests
Authors:   19 Stephen Oake Close, Manchester, M88AZ, UK, A. Abdalshafie Efhema Mastura ,   Department of Physics, Faculty of Science, Omar Al-Mukhtar University, Al-Bayda, Libya
Published: April 2024

This work introduces seven various polymer samples blended in a twin-screw extruder with flame retardants (FR), and an additive, which is a 1% Stabiliser, to investigate thermoplastic polymer melting, thermal decomposition, and melting moderates. The reduction method is used to analyze its melting points, physics and chemical properties, and thermal decomposition. Thermogravimetric Analysis (TGA) and Differential Thermal Analysis (DTA) tests are known as thermal analysis tests. It was established that halogenated flame retardants have little effect on reducing the rate of gas escape from polymer melt which affects the viscosity, as it was found. Thus, the APP and FR245 in Polymer help in some polymer leftovers. All samples were treated with flame retardants and no clay, melted completely, at the end of the test some samples did change. All these results investigated by (the XRD) test either, Scanning Electron Microscopic (SEM) or Digital images have been used also applied Limiting oxygen index (LOI) test, in the previous work for the same samples of polymers to verify the results and record a more precise outcome to draw the relationship between melting and dripping behavior via the following studies due to the furnace test which is modulated and calibrated. As a result, the addition of clay together with conventional flame retardants enhances the overall thermal stability forming the polymer. The compatibles help in improving the dispersion of the clay in polymer and reduce the rate of gas escape from polymer melt affecting the viscosity.
Study of promising carbon sorbents obtained by high-temperature activation in the purification of aqueous solutions from dyes
Authors:   Tambov State Technical University, Mkrtchyan E. S. , Popova A. A. ,   Tambov State Technical University, Shubin I. N. ,   Tambov State Technical University
Published: April 2024

The paper presents the results of studies conducted to determine the sorption capacity of a highly porous carbon material obtained by implementing two activation options - high-temperature alkaline activation and activation with additional processing of the material with steam. As a result, the obtained activated highly porous carbon material had a specific surface area of 2600 – 2700 m2/g and a pore volume of more than 1.3 cm3/g. A high sorption activity was established with respect to organic dyes — methylene blue (carbonizate = 1075 mg/g; AC-1 = 1865 mg/g; AC-2 = 2010 mg/g) and sunset (carbonizate = 66 mg/g; AC-1 = 934 mg/g; AC-2 = 972 mg/g). As a result of kinetic studies, the time of onset of sorption equilibrium for the studied sorbents was determined from 15 to 30 minutes. The obtained kinetic data were processed by pseudo-first and -second order, Elovich and intraparticle diffusion models. The pseudo-second order model has the highest determination coefficients R2 (when removing methylene blue dye molecules: AC-2 R2 = 1; AC-1 R2 = 1; carbonizate R2 = 0.9999; when removing sunset dye molecules: AC-2 R2 = 1; AC-1; R2 = 0.9999; carbonizate R2 = 0.9994). It has been established that a chemical interaction occurs between the dye molecules and the functional groups of the sorbent. As a result of research, it was found that activated carbon material can be a highly effective absorber of organic pollutants from aqueous solutions.
New silicon-rich mineral based materials and their use for remediation of hydrocarbon-contaminated soil
Authors:   nstitute Basic Biological Problems Russian Academy Sciences, Bocharnikova E. A. ,   ll-Russian Research Institute of Phytopathology, Demin D. V. ,   nstitute Basic Biological Problems Russian Academy Sciences,   ll-Russian Research Institute of Phytopathology, Matichenkov V. V. ,   nstitute Basic Biological Problems Russian Academy Sciences,   ll-Russian Research Institute of Phytopathology
Published: April 2024

Silicon (Si)-rich minerals are widely used in agriculture and ecology, in particular, for remediation of contaminated soils and restoration of soil fertility. But natural minerals are commonly low efficient, resulting in high application rate. The performance of Si-based materials is largely determined by the supply of active Si forms, primarily water-soluble monosilicic acid. The effect of different modes of heat treatment on the efficacy of zeolite, diatomite and marl as a source of active Si forms was studied. Heating at 500 – 700 °С provided sharp increase in the water- and acid-extractable Si. The highest increases were observed at 30 min heating at 500 °С and 15-min heating at 700 °С. A further increase in temperature up to 1000оС or at heating time more than 15 min at 700 °С led to decreasing active Si. In vegetation test conducted with sand polluted by mixture of used engine oil and diesel fuel, heat-activated marl (EcoFlora) facilitated a decrease in petroleum hydrocarbons from 3 to 0.5 % over 4 weeks. In addition, the wheat tolerance to hydrocarbon-induced toxicity was enhanced, which was evidenced by increased seed germination from 35 to 85 %, plant weight (by 200 – 500 %), and the content of photosynthetic pigments in wheat leaves (by 20 – 40 %).
PENGARUH MEDIA GAMBAR SERI TERHADAP KETERAMPILAN BERBICARA PADA SISWA KELAS IV MIS ANNUR BANDAR KHALIPAH
Authors: Permata Sari Bunga
Published: April 2024

Penelitian ini bertujuan untuk mengetahui : (1) Bagaimana keterampilan berbicara siswa dikelas kontrol tanpa menggunakan media gambar seri di kelas IV di MIS An-Nur Bandar Khalipah, (2) Bagaimana keterampilan berbicara siswa dikelas experimen dengan menggunakan media gambar seri di kelas IV di MIS An-Nur Bandar Khalipah, (3) Apakah terdapat pengaruh yang signifikan pada penggunaan media gambar seri terhadap keterampilan berbicara siswa di kelas IV di MIS An-Nur Bandar Khalipah. Metode dalam penelitian ini adalah kuantitatif, sedangkan jenis penelitian ini adalah metode eksperimen semu (quasy eksperimen), dengan design penelitian pretest-posttest control group design. Sampel pada penelitian ini sebanya 2 kelas dengan jumlah keseluruhan 38 siswa yaitu Sampel yang digunakan dalam penelitian ini yaitu kelas IV-A sebagai kelas eksperimen dan kelas IV-B sebagai kelas kontrol. Temuan penelitian ini sebagai berikut : (1) Keterampilan berbicara siswa dikelas kontrol tanpa menggunakan media gambar seri di kelas IV di MIS An-Nur Bandar Khalipah diperoleh nilai rata-rata dari hasil tes awal (pretest) sebesar 58,20 sedangkan postest memperoleh 78,05, (2) Keterampilan berbicara siswa dikelas experimen dengan menggunakan media gambar seri di kelas IV di MIS An-Nur Bandar Khalipah diperoleh dari hasil tes awal (pretest) sebesar 68,72 sedangkan postest memperoleh 90,89, (3) Terdapat pengaruh yang signifikan dari penggunaan media gambar dalam pembelajaran terhadap keterampilan berbicara siswa kelas IV MIS An-Nur Bandar Khalipah dibuktikan dengan skor t hitung> t tabel dan skorsignifikansi < 0,05. Maka dapat disimpulkan hipotesis dalam penelitian ini dapat di terima dan dinyatakan bahwa terdapat pengaruh yang positif dan signifikan dari penggunaan model pembelajaran menggunakan media gambar seri terhadap hasil belajar siswa pada mata pelajaran Bahasa Indonesia kelas IV MIS An-Nur Bandar Khalipah Tahun Ajaran 20211/2022.
Kata Kunci: Media Gambar Seri, Keterampilan Berbicara.
PENGARUH PELAKSANAAN LAYANAN BIMBINGAN KELOMPOK MENGGUNAKAN MEDIA AUDIO VISUAL UNTUK KECERDASAN SPIRITUAL SISWA KELAS VIII SMP NEGERI 23 MEDAN
Authors: Amara Ratih , Jamila Jamila
Published: April 2024

ABSTRAK:Penelitininibertujuanuntukmengetahuipengaruhpelaksanaanlayananbimbingankelompokmenggunakan media audio visual untukkecerdasan spiritual siswakelas VIII SMP Negeri 23 Medan TahunPelajaran 2022/2023. Jenispeneltianiniialahkuantitatifdenganmetodeeksperimenyaitu one gruppretest san postestdesing. Populasi yang berjumlah 30 siswa, sedangkanuntukmenentukansampelpenelitianinimenggunakan purposive sampling yakni 9 siswaKelas VIII H. Instrumen yang digunakandalampenelitianinimenggunakanangket yang berjumlah 26 item pernyataan. Penelitianinimenggunakan Product moment danjugamenggunakan SPSS 23. Bersarkanhasilpenelitianinimakadiperolehpada sig. (2-tailed) yaitu 0,001 < 0,05makaHoditolakdan Ha diterima. Disimpulkanadanyaperbedaanantarahasilpretestdanpostestterkaitkecerdasan spiritual siswa. Dengandemikianterdapatpengaruhpelaksanaanlayananbimbingankelompokmenggunakan media audio visual untukkecerdasan spiritual siswakelas VIII SMP Negeri 23 Medan.

Kata kunci: BimbinganKelompok, Media Audio Visual, Kecerdasan Spiritual.
 ABSTRACT: This research aims to determine the effect of implementing group guidance services using audio-visual media for the spiritual intelligence of class VIII students at SMP Negeri 23 Medan for the 2022/2023 academic year. This type of research is quantitative with an experimental method, namely one group pretest and posttest design. The population was 30 students, while to determine the sample for this study, purposive sampling was used, namely 9 students from Class VIII H. The instrument used in this research used a questionnaire consisting of 26 statement items. This research uses Product Moment and also uses SPSS 23. Based on the results of this research, sig. (2-tailed), namely 0.001 < 0.05, then Ho is rejected and Ha is accepted. It was concluded that there was a difference between the pretest and posttest results regarding students' spiritual intelligence. Thus, there is an influence of the implementation of group guidance services using audio-visual media for the spiritual intelligence of class VIII students at SMP Negeri 23 Medan.Keywords: Group Guidance, Audio Visual Media, Spiritual Intelligence.
ЭКСПЕРИМЕНТАЛЬНОЕ ДЕТЕКТИРОВАНИЕКОНФОРМАЦИОННЫХ ПЕРЕХОДОВ МЕЖДУ ФОРМАМИ ДНК: ПРОБЛЕМЫ И ПЕРСПЕКТИВЫ
Authors:   Федеральное государственное бюджетное учреждение науки Федеральный исследовательский центр химической физики им. Н.Н. Семенова РАН, ЗУБОВА Е.А. , СТРЕЛЬНИКОВ И.А. ,   Федеральное государственное бюджетное учреждение науки Федеральный исследовательский центр химической физики им. Н.Н. Семенова РАН
Published: April 2024

Двойная спираль ДНК, в зависимости от условий, может иметь разную геометрическую форму. Из большого количества её конформаций, кроме наиболее часто встречающейся «канонической» В-формы, широко известны ее A, C и Z формы, и менее известны DA, DB, Хугстиновская и X формы.
АНАЛИЗ СТРУКТУРЫ УЛЬТРАТОНКИХ ВОЛОКОННА ОСНОВЕ СМЕСЕЙ ПОЛИЛАКТИДА И ПОЛИКАПРОЛАКТОНА
Authors:   Федеральное государственное бюджетное учреждение науки Федеральный исследовательский центр химической физики им. Н.Н. Семенова РАН, ОЛЬХОВ А.А. ,   Российский экономический университет им. Г. В. Плеханова, КАРПОВА С.Г. ,   Институт биохимической физики им. Н. М. Эмануэля Российской академии наук, МАРКИН В.С. ,   Федеральное государственное бюджетное учреждение науки Федеральный исследовательский центр химической физики им. Н.Н. Семенова РАН, КУЧЕРЕНКО Е.Л. ,   Федеральное государственное бюджетное учреждение науки Федеральный исследовательский центр химической физики им. Н.Н. Семенова РАН, ХАН О.И. ,   Российский университет дружбы народов, СТАНИШЕВСКИЙ Я.М. ,   Российский университет дружбы народов, ИОРДАНСКИЙ А.Л. ,   Федеральное государственное бюджетное учреждение науки Федеральный исследовательский центр химической физики им. Н.Н. Семенова РАН
Published: April 2024

1, 1, 4, 4, 1 1 Федеральное государственное бюджетное учреждение науки Федеральный исследовательский центр химической физики им. Н. Н. Семенова Российской академии наук 2 Российский экономический университет им. Г. В. Плеханова 3 Институт биохимической физики им. Н. М. Эмануэля Российской академии наук 4 Российский университет дружбы народов Тип: статья в сборнике трудов конференции Язык: русский Год издания: 2024 Страницы:
ВЫВОД ФОРМУЛ ТЕРМОУПРУГОСТИДЛЯ ДИСПЕРСНОГО НАПОЛНИТЕЛЯ ПОЛИМЕРНОГО КОМПОЗИТА
Authors:   Федеральное государственное бюджетное учреждение науки Федеральный исследовательский центр химической физики им. Н.Н. Семенова РАН, ТУРУСОВ Р.А.
Published: April 2024

В работе приводится вывод формул термоупругости для дисперсного наполнителя полимерного композита, исходя из формул смеси для ортотропного волокнистого композита. За основу взят регулярный композит с кубическим наполнителем [1]. Такой подход в получении формул термоупругости для диспернонаполненного полимера применяется впервые.
ВЛИЯНИЕ ВИХРЕВЫХ ТЕЧЕНИЙ В МИКРОКАПЛЕ НА СВОБОДНО-РАДИКАЛЬНУЮ ПОЛИМЕРИЗАЦИЮ ПРИ ИНИЦИИРОВАНИИ НА ГРАНИЦЕ РАЗДЕЛА ФАЗ
Authors:   Федеральное государственное бюджетное учреждение науки Федеральный исследовательский центр химической физики им. Н.Н. Семенова РАН, РОЩИН Д.Е. , ПАТЛАЖАН С.А. ,   Федеральное государственное бюджетное учреждение науки Федеральный исследовательский центр химической физики им. Н.Н. Семенова РАН
Published: April 2024

Рассмотрен процесс свободно-радикальной полимеризации микрокапли мономера при течении в несовместимой с ней жидкости, содержащей раствор инициатора. Поскольку генерация первичных радикалов происходит во внешней среде, то инициирование полимеризации возможно только за счет взаимодействия между молекулами мономера на поверхности капли с первичными радикалами в окружающей среде.
ПРИМЕНЕНИЕ ФУНКЦИИ ГРИНАДЛЯ РАСЧЕТА ДИСПЕРСИОННЫХ КРИВЫХ ДВУМЕРНЫХ ЛОКАЛЬНО-РЕЗОНАНСНЫХ МЕТАМАТЕРИАЛОВ
Authors:   НИУ ВШЭ, СОРОКИН С.А. , СМИРНОВ В.В. ,   Федеральное государственное бюджетное учреждение науки Федеральный исследовательский центр химической физики им. Н.Н. Семенова РАН, КОВАЛЕВА М.А. ,   НИУ ВШЭ
Published: April 2024

Одним из наиболее актуальных направлений развития современной науки о материалах является исследование и разработка так называемых метаматериалов: искусственно созданных сред с необычными характеристиками, зачастую выходящими за рамки традиционных представлений [1]. Уникальные свойства метаматериалов связаны, в первую очередь, с их структурой субволнового размера — элементарных блоков, часто называемых «метаатомами».
ВЛИЯНИЕ СТРУКТУРЫ ЭПОКСИ-ПОЛИМЕРНЫХ МАТРИЦ НА СВОЙСТВА ОДНОНАПРАВЛЕННЫХ СТЕКЛОПЛАСТИКОВ ПОСЛЕ УДАРА И ВОЗДЕЙСТВИЯ ВОДЫ
Authors:   Федеральное государственное бюджетное учреждение науки Федеральный исследовательский центр химической физики им. Н.Н. Семенова РАН, ТРЕТЬЯКОВ И.В. , КИРЕЙНОВ А.В. ,   Федеральное государственное бюджетное учреждение науки Федеральный исследовательский центр химической физики им. Н.Н. Семенова РАН, ЮРКОВ Г.Ю. ,   Федеральное государственное бюджетное учреждение науки Федеральный исследовательский центр химической физики им. Н.Н. Семенова РАН, СОЛОДИЛОВ В.И. ,   Федеральное государственное бюджетное учреждение науки Федеральный исследовательский центр химической физики им. Н.Н. Семенова РАН
Published: April 2024

Стеклопластики (СП) широко используются как конструкционные и облицовочные материалы из-за относительной дешевизны, низкого удельного веса и хороших физико-механический свойств. В большинстве случаев для получения матриц полимерных композиционных материалов (ПКМ) используют эпоксидные смолы. Матрицы ПКМ на основе эпоксидиаминовых (ЭД) связующих обладают высоким модулям упругости и адгезией к волокнам. Существенный недостаток ЭД заключается в повышенной хрупкости и, как следствие, в низкой ударостойкости.
ИССЛЕДОВАНИЕ ДВОЙНЫХ И ТРОЙНЫХ БИОРАЗЛАГАЕМЫХ КОМПОЗИЦИЙ НА ОСНОВЕ ПОЛИЛАКТИДА,ПОЛИ(3-ГИДРОКИБУТИРАТА) И ХИТОЗАНА
Authors:   Федеральное государственное бюджетное учреждение науки Федеральный исследовательский центр химической физики им. Н.Н. Семенова РАН, ЯХИНА А.Р. , РОГОВИНА С.З. ,   Федеральное государственное бюджетное учреждение науки Федеральный исследовательский центр химической физики им. Н.Н. Семенова РАН, ЖОРИНА Л.А. ,   Федеральное государственное бюджетное учреждение науки Федеральный исследовательский центр химической физики им. Н.Н. Семенова РАН, БЕРЛИН А.А. ,   Федеральное государственное бюджетное учреждение науки Федеральный исследовательский центр химической физики им. Н.Н. Семенова РАН, ИОРДАНСКИЙ А.Л. ,   Федеральное государственное бюджетное учреждение науки Федеральный исследовательский центр химической физики им. Н.Н. Семенова РАН
Published: April 2024

Проблема загрязнения окружающей среды промышленными отходами и бытовым мусором привела к необходимости создания новых материалов, спо- собных разлагаться под действием окружающей среды на безвредные для при- роды вещества. В этой связи разработка полимерных композиций на основе по- лимеров природного происхождения становится в настоящее время все более актуальной. Особый интерес представляют синтезируемые из природного сырья, соответственно химическим и микробиологическим путем, алифатиче- ские полиэфиры полилактид (ПЛА) и полигидроксибутират (ПГБ).
ИСПОЛЬЗОВАНИЕ МЕТОДА PULL-OUT ДЛЯ ОЦЕНКИ ПРОЧНОСТИ СЦЕПЛЕНИЯ КОМПОНЕНТОВ В СОЕДИНЕНИЯХ«ТЕРМОРЕАКТИВНОЕ СВЯЗУЮЩЕЕ - ВОЛОКНО, ПОКРЫТОЕ ОТВЕРЖДЕННЫМ СЛОЕМ ТОГО ЖЕ СВЯЗУЮЩЕГО»
Authors:   Федеральное государственное бюджетное учреждение науки Федеральный исследовательский центр химической физики им. Н.Н. Семенова РАН, ГОРБАТКИНА Ю.А. , ГОРБУНОВА И.Ю. ,   ФГБУВО «Российский химико-технологический университет им. Д. И. Менделеева», ИВАНОВА-МУМЖИЕВА В.Г. ,   Федеральное государственное бюджетное учреждение науки Федеральный исследовательский центр химической физики им. Н.Н. Семенова РАН, КОРОХИН Р.А. ,   Федеральное государственное бюджетное учреждение науки Федеральный исследовательский центр химической физики им. Н.Н. Семенова РАН, КУЗНЕЦОВА А.В. ,   ФГБУВО «Российский химико-технологический университет им. Д. И. Менделеева»
Published: April 2024

При изготовлении толстостенных изделий из однонаправленных волокни- стых композитов с успехом используется метод послойной намотки. При этом изделие отверждается после намотки каждого слоя или нескольких слоев. Это позволяет значительно снизить остаточные напряжения, возникающие в про- цессе отверждения. Однако материал при этом подвергается многократной теп- ловой обработке, и возникает много границ между слоями. Как сказывается все это на свойствах изделия и механизмах его разрушения, до конца не выяснено.
КОМПОЗИЦИОННЫЕ МАТЕРИАЛЫ НА ОСНОВЕ НАНОЧАСТИЦ ПОЛИТИТАНАТА КАЛИЯ И ПОЛИОЛЕФИНОВЫХ МАТРИЦ
Authors:   Федеральное государственное бюджетное учреждение науки Федеральный исследовательский центр химической физики им. Н.Н. Семенова РАН, ЖУКОВ А.М. , ЮРКОВ Г.Ю. ,   Федеральное государственное бюджетное учреждение науки Федеральный исследовательский центр химической физики им. Н.Н. Семенова РАН, ГОРОХОВСКИЙ А.В. ,   Саратовский государственный технический университет имени Гагарина Ю. А, Саратов
Published: April 2024

Производство полимерных композиционных материалов (ПКМ) с задан- ным комплексом свойств, отличающихся от свойств исходных компонентов, является ключевой задачей в современной промышленности. Для производства ПКМ, в настоящее время, наиболее популярными матрицами остаются полиолефиновые матрицы, а именно: полиэтилен (ПЭ) и полипропилен (ПП). Введение наполнителей позволяет достигнуть широкого спектра свойств, не ха- рактерных для ненаполненного полимера. Добавление наночастиц металлов из- меняет свойства исходной матрицы, среди которых: механические, электриче- ские, антибактериальные и др. Получают такие материалы методом смешения в области температур плавления полимера.
Conexiones Matemáticas utilizadas por profesores mexicanos de nivel medio superior al resolver tareas sobre la pendiente
Authors: Salgado-Beltrán Gerardo , García-García Javier
Published: April 2024

Esta investigación tuvo por objetivo identificar las conexiones matemáticas que establecen un grupo de profesores mexicanos de Nivel Medio Superior al resolver tareas que involucran el concepto de pendiente. Una conexión matemática se entiende como una relación verdadera entre dos o más ideas, conceptos, definiciones, teoremas, procedimientos, representaciones y significados entre sí, con los de otras disciplinas o de la vida real. Para la colecta de datos se utilizó una entrevista basada en tareas y el análisis temático para analizarlos. Los resultados indicaron que los profesores establecieron seis tipos de conexiones matemáticas: representaciones diferentes, procedimental, significado, característica, parte-todo e implicación
Training university students for interacting with foreign partners in their future professional activities using a lingua franca
Authors: Timkina Yuliya Yurevna
Published: April 2024

The aim of the research is to define the pedagogical conditions for teaching a foreign language as a lingua franca for solving professional tasks in a university. The article analyzes the peculiarities of the lingua franca, formulates the concept of "lingua franca" based on the needs of the educational process, establishes the educational goal of foreign language education, and defines the pedagogical conditions for teaching a foreign language as a lingua franca in a university setting. The research's scientific novelty lies in identifying the pedagogical conditions for teaching international English as a lingua franca within a professionally oriented foreign language education framework in a university. The study determined that teaching a lingua franca is associated with developing a professionally oriented intercultural linguistic personality. The pedagogical conditions of the educational process aimed at forming this type of linguistic personality include: selecting language resources of international English in the field of future professional activity, organizing practical sessions as group work to solve research tasks, designing independent work to address individual needs in carrying out language activities.
Specifics of autointerpretation in the novel “The Teenager Savenko, or Self-Portrait of a Bandit in Adolescence” by E. Limonov
Authors: Osmukhina Olga Yurievna
Published: April 2024

The article is devoted to the analysis of the novel “The Teenager Savenko, or Self-Portrait of a Bandit in Adolescence” by E. Limonov, the largest contemporary novelist and representative of the Russian emigration of the “third wave”, in the context of the problem of auto-interpretation, which is explained by the need to identify the key features of the poetics of the writer’s early work, which will largely determine his subsequent works. The aim of the study is to identify the peculiarity of auto-interpretation in E. Limonov’s novel “The Teenager Savenko...”. The scientific novelty of our work consists in the fact that for the first time in “The Teenager Savenko, or Self-Portrait of a Bandit in Adolescence” the means of authorial representation are established and holistically comprehended. As a result, it is revealed that, firstly, the writer plays with the details of his own biography, referring to the “Kharkov” period of his life; secondly, the author’s mask of Edi-Baby becomes the most important technique of authorial interpretation; thirdly, the author’s mask is constructed through the techniques of autobiography, retrospection, and deep reflection, generated by the collision of two points of view (of the young autogamer and the author of the “real”, who leads the narrative in a neutral, quasi-epic form).
The problem of artistic synthesis in Bashkir prose in the second half of the 20th century: M. Karim's novella "A Long, Long Childhood"
Authors: Gareeva Gulfira Nigamatovna , Shaydullina Alsu Mishatovna
Published: April 2024

The aim of the research is to identify the predominant features of genre synthesis in Bashkir prose in the second half of the 20th century based on a comparative-historical analysis of genre components present in the seminal work of M. Karim "A Long, Long Childhood". The scientific novelty of the study lies in identifying various genre-stylistic varieties that create a synthesis, a new internal epic form in M. Karim's novella, which was subsequently developed by other writers. This aspect is selected for this research as a key one and presents undeniable interest for understanding the writer's individual style. For the first time, the genre poetics of M. Karim's novella "A Long, Long Childhood" is examined from the perspective of the problem of artistic synthesis. The obtained results showed that M. Karim's novella "A Long, Long Childhood", representing an organic synthesis of form and content, contributed to the activation of the movement of Bashkir prose towards a socio-philosophical epic whole, the emergence of various genre-stylistic directions in Bashkir prose in the second half of the 20th century up to the present time.
Forms of the PR biography in the context of the genre system
Authors: Kovtunenko Inna Viktorovna , Bondarenko Yuriy Borisovich
Published: April 2024

The aim of the research is to identify the main genre forms of the PR biography, their specificity in application, the features of interaction in communication processes and their effective utilization in PR activities. The paper examines the features of using fundamental forms of the PR biography such as summary biographies, story biographies, and narrative biographies, studying their properties in both theoretical and practical aspects. The scientific novelty lies in contributing to science through a comprehensive analysis of PR biographies as a tool for shaping public opinion and reputation management. This enriches the theoretical database of genres with new aspects of their structural-stylistic diversity and functionality. For the first time in the realm of Russian communicative culture, there has been an in-depth study of the relationships between various forms of PR biographies and their effectiveness in goal setting and achieving communicative tasks. Furthermore, the scientific novelty lies in the application of a comprehensive approach combining analytical, comparative, and empirical methods to assess the practical use of PR biographies, revealing new trends and techniques in creating this genre of texts not previously explored in scientific literature. This research emphasizes the importance of the PR biography genre in the context of communication strategies and public relations. The research findings show that PR biographies can take various forms and combine genre models, enhancing text perception efficiency through the use of established forms from the practice of public relations. In addition, mechanisms from other discourses, such as interviews, confessions, newspaper articles, and chronicles, are actively involved in PR biographies, highlighting the need for systematic text updating and maintenance to keep them current.
SKEMA CITRA IDENTITAS PADA METAFORA DALAM LAGU-LAGU KINGS OF CONVENIENCE: KAJIAN SEMANTIK KOGNITIF
Authors: Puteri Ariani Dwi , Nur Tajudin
Published: April 2024

Penelitian skema citra identitas ini dilakukan menggunakan metode kualitatif. Data penelitian diambil dari lirik lagu-lagu Kings of Convenience, berjudul Mrs. Cold, Love Is A Lonely Thing dan Cayman Islands dari situs internet. Teori yang digunakan adalah skema citra, bentuk dan jenis metafora yang terdapat pada data. Hasil penelitian menunjukkan bahwa berdasarkan teori Cruse dan Croft (2004) terdapat spesifik skema citra identitas sebanyak 14 data. Skema citra identitas yang muncul didukung oleh teori Sprecher dan Duck (1994) yang membagi skema citra identitas menjadi dua, yaitu kesesuaian (matching) dan superimposisi (superimposition). Teori skema citra identitas ini dapat diaplikasikan di dalam berbagai bidang, salah satunya yaitu ilmu linguistik yang berhubungan dengan semantik kognitif. Jenis skema citra identitas sesuai ditemukan 12 data, sedangkan skema citra superimposisi ditemukan 2 data. Setelah itu pengklasifikasian jenis metafora yang muncul menggunakan teori Lakoff dan Johnson (2003), ditemukan 6 metafora struktural dan 8 metafora ontologis.
Unsur Naratif Pada Permainan Seluler “Selera Nusantara – Episode: Nasi Goreng”
Authors: Setiawan Fredy Nugroho
Published: April 2024

“Selera Nusantara” is a mobile simulation game from Indonesia. The game not only offers cooking simulation challenges for the players but also provides information about the main characters who appear between game levels. The existence of story elements in the permainan seluler is the focus of this research. In this case, we chose “Selera Nusantara – Episode: Nasi Goreng” as the object of study. This research is about how the narrative aspect in the permainan seluler "Selera Nusantara – Episode: Nasi Goreng" is built. The arguments proposed by Egenfeldt-Nielsen, Smith, and Tosca in their book, Understanding Video Games (2020), are used as the theoretical framework of this research, especially the discussion about narrative. The results of this research show that the narrative aspect in "Selera Nusantara - Episode: Nasi Goreng" is constructed through a series of cutscenes which, if separated from the game mechanics and put together sequentially from level to level of the game, form a progressive plot identical with stories in short stories, novels, or film. Although integrated in the game, the plot does not affect the simulation game session. However, to be able to understand the complete series of stories that form the context of the game world (gamespace), players must go through each stage of the level. Thus, it can be concluded that the story fragments which become the background of "Selera Nusantara – Episode: Nasi Goreng" provide a narrative to the game, which makes it a form of ergodic literature.
Radar with holographic coding of probing signal
Authors:   Ufa University of Science and Technology 450076, Russia, Ufa, Z. Validi Street, 32, Timofeev A.L. , Sultanov A.Kh. ,   Ufa University of Science and Technology 450076, Russia, Ufa, Z. Validi Street, 32, Meshkov I.K. ,   Ufa University of Science and Technology 450076, Russia, Ufa, Z. Validi Street, 32, Gizatulin A.R. ,   Ufa University of Science and Technology 450076, Russia, Ufa, Z. Validi Street, 32
Published: April 2024

A method has been developed for generating a radar probing signal by phase-code manipulation of the signal with a binary sequence, which is a one-dimensional digital hologram of a virtual optical object. The effectiveness of this method is determined by the use of the fundamental property of the hologram - divisibility, which allows you to restore the original object from a distorted fragment of the hologram. Modeling of radar detection and measurement of target parameters in noise conditions has been carried out, and the results of a comparison of holographic coding with the widely used method of generating a sounding signal by phase-code manipulation of the signal with a pseudo-random binary sequence having a maximum period (maximum length sequence, M-sequence) are presented. It is shown that the holographic method of generating a probing signal and decoding an echo signal, proposed for use in digital radar, provides high noise immunity at high levels of noise, natural and artificial interference, increases the target detection range, provides resolution of several targets, including small targets against the background of large ones , and improves the accuracy of speed measurement. As a result of the simulation, it was found that replacing phase-code keying with the M-sequence with holographic coding gives a gain in signal-to-noise ratio of 20 dB. It is shown that the transition from coding the shape of the probing signal to holographic coding of the shape of its spectrum in a channel with additive white Gaussian noise allows us to obtain an additional increase in noise immunity by 8 dB.
Изучение накопления естественных и искусственных радионуклидов лекарственным растительным сырьем на примере листьев крапивы двудомной
Authors: Дьякова Нина Алексеевна
Published: April 2024

Целью настоящего исследования являлось изучение особенностей аккумуляции радиоизотопов природного и техногенного происхождения в лекарственном растительном сырье на примере листьев крапивы двудомной (Urtica dioica L.). В условиях эксперимента в образцах верхних слоев почв и листьях крапивы двудомной определяли удельную активность основных долгоживущих искусственных радиоизотопов (цезий-137, стронций-90) и часто встречаемых в природе естественных радионуклидов (торий-232, калий-40, радий-226) на спектрометре-радиометре МКГБ-01 «РАДЭК». Все изученные образцы листьев крапивы двудомной, заготовленные в естественных и искусственных фитоценозах Воронежской области, соответствуют существующим требованиям радиационной безопасности (первая группа). Корреляционный анализ удельной активности искусственных и естественных радионуклидов в почве и листьях крапивы двудомной показал наличие тесной взаимосвязи между данными числовыми показателями, что подтвердило преимущественное транспочвенное их загрязнение. При увеличении удельной активности стронция-90, цезия-137, тория-232, калия-40, радия-226 в почве возрастала их удельная активность в лекарственном растительном сырье. Для листьев крапивы двудомной, произрастающей в Воронежской области, отмечено интенсивное аккумулирование из верхних слоев почв цезия-137 и калия-40. Детальный анализ зависимости рассчитанных коэффициентов накопления природных и техногенных радиоизотопов в листьях крапивы двудомной позволил отметить тенденции к снижению их при увеличении удельной активности радионуклида в почве, что говорит о наличии физиологических механизмов регуляции поступления их в растение.
Разработка пероральной лекарственной формы нитрозильного комплекса железа с тиосульфатными лигандами — экзогенного донора оксида азота (NO)
Authors: Новикова Вероника Олеговна , Покидова Олеся Викторовна , Санина Наталия Алексеевна
Published: April 2024

Разработаны состав и технология получения твердой дозированной стабильной лекарственной формы (ЛФ) перспективного представителя класса доноров монооксида азота (NO) — анионного тетранитрозильного комплекса железа с тиосульфатными лигандами Na2[Fe2(S2O3)2(NO)4] · 4H2O. Показано, что скорость генерации комплексом NO можно модулировать путем использования вспомогательных веществ различных типов либо варьированием их концентрации. Установлено, что оптимальным пролонгирующим средством при изготовлении данной ЛФ является альбумин. Разработанная ЛФ обеспечивает расширение арсенала лекарственных агентов — доноров NO пролонгированного действия, применяемых для лечения социально-значимых заболеваний.
Costo-efectividad de métodos diagnósticos en apendicitis, revisión sistemática
Authors: Guevara César Augusto , Carrillo Diana Cristina
Published: April 2024

Introducción. El diagnóstico de apendicitis puede ser difícil en algunos casos, por lo cual requiere el uso de técnicas diagnósticas tales como el ultrasonido y la tomografía computadorizada. No obstante, el uso de estos puede incrementar significativamente los costos. El objetivo de este estudio fue estimar sistemáticamente las evaluaciones económicas publicadas, con el fin de determinar cuál es la alternativa más costo-efectiva en el diagnóstico de esta condición.

Materiales y métodos. Se hizo una revisión sistemática de los estudios completos de costo-efectividad en bases de datos electrónicas que evaluaran las técnicas diagnósticas en apendicitis, sin límites de fecha de publicación.

Resultados. Se encontraron 203 estudios, aunque 201 fueron excluidos (186 estaban duplicados, 6 no eran evaluaciones económicas diagnósticas completas y 9 no cumplían los criterios de calidad metodológica).

Se incluyeron dos estudios de costo-efectividad. En ambos se evaluó el ultrasonido y la tomografía computadorizada, utilizando modelos analíticos de decisión. En un estudio se encontró que la tomografía computadorizada era costo-efectiva (Col $ -47 por paciente diagnosticado), en comparación con el ultrasonido con probabilidades preprueba de 20 a 80 %. No obstante, con probabilidades preprueba mayores de 88 %, el ultrasonido era la alternativa más costo-efectiva (Col $ -8,2 por paciente diagnosticado). En otro estudio se encontró que el ultrasonido seguido por la tomografía computadorizada, en comparación con la tomografía o el ultrasonido solos, era la alternativa más costo-efectiva en hombres y mujeres: US$ 7.852 por años de vida ajustados a calidad frente a US$ 17.108 por años de vida ajustados a calidad, respectivamente.

Conclusión. Aunque la tomografía computadorizada puede ser una alternativa costo-efectiva en comparación con el ultrasonido, la razón de costo-efectividad de estos métodos depende de la probabilidad preprueba.
Trabajo en equipo como factor contribuyente en la ocurrencia de errores médicos o eventos adversos
Authors: Amaya Ana Carolina , Narváez Ricardo , Eslava Schmalbach Javier
Published: April 2024

Objetivo. El objetivo de esta revisión fue evaluar el trabajo en equipo como variable contribuyente a errores médicos o eventos adversos en salas de cirugía.

Método. Se revisaron las bases de datos: Cochrane Library, Medline/PubMed, Embase, Ovid y Lilacs. Se incluyeron: revisiones sistemáticas, ensayos clínicos de asignación aleatoria, estudios controlados de antes y después o estudios de cohortes, donde se hubiera medido el trabajo en equipo y su relación con errores médicos o eventos adversos. Dos autores aplicaron de forma independiente los criterios de inclusión y exclusión a la revisión de títulos y resúmenes, y las discrepancias se resolvieron por consenso. Se revisaron los textos completos de los artículos seleccionados y se aplicaron estrategias para evaluar la calidad de la información.

Resultados. De 917 estudios identificados en la búsqueda, se seleccionaron 32; además, se incluyeron cuatro investigaciones sugeridas por expertos. Ocho estudios cumplieron con los criterios de inclusión. Los estudios presentaron baja calidad, subjetividad en las mediciones, ausencia de grupos de control, problemas en el cegamiento, ocultamiento o posible efecto Hawthorne.

Conclusiones. La información (evidence) sobre el impacto del trabajo en equipo en la seguridad del paciente es deficiente. Algunos resultados sugieren que los pacientes intervenidos por grupos de cirugía que habían presentado dificultades en el trabajo en equipo, tuvieron mayor riesgo de sufrir eventos adversos. Son necesarios estudios con mejor información y mayor calidad, que permitan determinar el impacto positivo en los resultados en salud de un adecuado trabajo en equipo en las salas de cirugía.