bluuebunny/crossref_metadata_2025 huggingface dataset:
МАТЕМАТИЧЕСКОЕ МОДЕЛИРОВАНИЕ ЗАДАЧИ ПЕРЕНОСА ВЕЩЕСТВА В ДВУМЕРНОЙ НЕОДНОРОДНОЙ СРЕДЕ
Authors:   Samarqand davlat universiteti, М М а х м у д о в   Ж , И У с м о н о в   А , Б К у л ж о н о в   Ж
Published: March 2023

Поставлена и численно решена задача аномального переноса в двумерной постановке и определены поля концентрации вещества. Считается, что среда имеет фрактальную структуру. Следовательно, перенос вещества описывается дифференциальными уравнениями с дробными производными. Решена соответствующая задача и оценены различные характеристики переноса.
МЕЖМОЛЕКУЛЯРНЫЕ ВЗАИМОДЕЙСТИВИЯ МОЛЕКУЛ ДИМЕТИЛФОРМАМИДА, СПЕКТРЫ КОМБИНАЦИОННОГО РАССЕЯНИЯ И НЕЭМПИРИЧЕСКИЕ (аb initio) РАСЧЕТЫ
Authors:   Samarqand davlat universiteti, Ж у м а б а е в А , Х у ш в а к т о в Х , Д ж у м а н о в Л , Ш е р м а т о в A
Published: March 2023

В работе изучены межмолекулярные взимодействия изолированных молекулярных кластеров по методам HF и B3LYP (6-31G++(d, p). Показано, что при образовании молекулярных кластеров молекулами диметилформамида существенную роль играет водородная связь и резонансный перенос колебательной энергии. Определено, что существуют различные слабые взаимодействия водородных связей, при этом C-H, N и две группы CH3 являются слабыми донорами, C=O является сильным акцептором.
ASETALDEGID VODOROD FTORID KOMPLEKSINING TEBRANISH POLOSALARI PARAMETRLARINI O’RGANISH
Authors:   Samarqand davlat universiteti, M u r o d o v G ’ , B u t u r l i m o v a M , X o ’ j a m o v U , A m o n o v A , N u r m u r o d o v a G
Published: March 2023

Ushbu ishda Gaussian-09 dasturi asosida mp2 ∕ 6-311 ++ G (3df, 3pd) yaqinlashishda asetaldegid va uning vodorod ftorid bilan kompleksining spektral va energetik parametrlari aniqlandi. Hisoblashlar natijasida asosiy chastotalardan tashqari obertonlar va yig’indi chastotalar ham aniqlandi. Kompleks hosil bo’lishi natijasida vodorod ftoridning tebranish polosasining shakllanish mexanizmi tushuntirildi
ИЗУЧЕНИЕ РАССЕЯННОГО ЗВЕЗДНОГО СКОПЛЕНИЯ OCISM 67
Authors:   Samarqand davlat universiteti, Г Каримов Р , Ш Жураев Б , К Турниязов Р
Published: March 2023

В данной работе проведено изучение астрометрических 5D фазовых пространственных данных каталога Gaia DR2 относительно молодого РЗС OCISM 67. Используя метод выделения звезд в качестве вероятных членов, скопления предложенный в работе, была построена и изучена векторная диаграмма РЗС, выделены вероятные члены скопления, определены их средние значения собственных движений и параллакс.
ЗАДАЧА О ДИФРАКЦИИ НЕСТАЦИОНАРНОЙ ПЛОСКОЙ ПОПЕРЕЧНОЙ ВОЛНЫ НА ЖЕСТКОМ ШАРЕ В ПОРИСТО-УПРУГОМ ПРОСТРАНСТВЕ
Authors:   Samarqand davlat universiteti, О Мусурмонова М
Published: March 2023

Задачи о распространении и дифракции нестационарных волн в пористо-упругих средах имеют большое теоретическое и практическое значение в таких областях науки и техники, как геофизика, геология, сейсморазведка полезных ископаемых, сейсмостойкость сооружений и многие другие. В работе рассматривается задача о дифракции нестационарной плоской поперечной волны сдвига на неподвижном жестком шаре в насыщенном пористо-упругом пространстве. Для решения задачи применялось интегральное преобразование Лапласа по безразмерному времени и метод неполного разделения переменных. В пространстве изображений получены формулы для коэффициентов рядов компонент вектора перемещения и тензора напряжений. Переход к оригиналам осуществляется с помощью теории вычетов. Проведены численные эксперименты, результаты которых представлены в виде графиков. Полученные результаты работы могут быть использованы в области геофизики, сейсмологии и проектных организаций при строительстве сооружений, а также при проектировании подземных резервуаров
SEPARATELY-ANALYTIC FUNCTION WITH SINGULARITIES SET OF POSITIVE LEBESGUE MEASURE
Authors:   Samarqand davlat universiteti, A Atamuratov A , K Rasulov K
Published: March 2023

In this work Shimoda’s theorem on separately-analytic functions is discussed and there is constructed an example of separately-analytic function with singularities set of positive Lebesgue measure. Proved that, separately-analytic functions satisfying Shimoda’s theorem on

can be represented by Hartogs’ series with holomorphic coefficients out of some nowhere dense compact subset of

.
О ДИНАМИКЕ НЕКОТОРЫХ СЕМЕЙСТВ СТОХАСТИЧЕСКИХ ОПЕРАТОРОВ В ДВУМЕРНОМ СИМПЛЕКСЕ
Authors:   Samarqand davlat universiteti, Х Эшкабилов Ю , З Истамов Ж
Published: March 2023

В этой работе мы исследовали инвариантные подмножества, неподвижные

точки и динамику некоторых стохастических операторов с параметрами на двумерном

симплексе .
BREAST CANCER CLASSIFICATION USING DEEP LEARNING MODEL FOR CC AND MLO VIEWS OF MAMMOGRAMS
Authors:   Samarqand davlat universiteti, Kh Fazilov S h , S Abdieva K h , D Sobirova G
Published: March 2023

In this work, we explore a way for analyzing a mammography exam holistically. We present the design and implementation of a deep learning model that takes as input the two mammography views (CC and MLO), as well as all detected breast masses and micro calcifications, and produces an output consisting of a three-class classification of the entire exam: negative (or normal), benign, or malignant findings. The registration of the CC and MLO views of a mammography exam is a difficult task due to the difficulty in estimating the non-rigid deformations that can align these two views, so we propose the deep learning model classification, with the hypothesis that the high-level nature of these features will reduce the need for a low-level matching of the input data.
JIZZAX VILOYATI QO‘YTOSH TOG‘ TIZMASINING TABIIY RADIOAKTIVLIGI TO‘G‘RISIDA
Authors:   Samarqand davlat universiteti, B Mamatqulov O , U To‘xtayev U , S Tog‘ayev B , A Umirzaqov E , T Nurmurodov L , N Yusupov M , Sh Sayfiyev S h , Q Qilichev A
Published: March 2023

Nurota tog‘-kon sanoati Respublikamizning rangli metallurgiya hamda kamyob yer metallari qazib olish sanoati uchun eng istiqbolli hududlardan biri hisoblanadi. XX asrning ikkinchi yarmida Qo‘ytoshda molibden va volframni qazib olish va boyitish boshlandi. Hozirgi kunda ochiq va yopiq kon karyerlari va burg‘ulagan joylarning radioaktiv holatini monitoring qilish taqdim etilayotgan ishning asosiy maqsadi hisoblanadi. Ishda Qo‘ytosh hududidan olingan tuproq namunalarining TRN miqdori NaI(Tl) kristalli ssintillyatsion gamma-spektrometrda tadqiq etildi. Hududning tuproq va tog‘etaklaridagi maydonlarning yer yuzasidagi ROZ (radonning oqim zichligi) miqdori aniqlandi.
ANDIJON VILOYATI QISHLOQ, O‘RMON VA BALIQCHILIK XO‘JALIGI RIVOJLANISHINING IQTISODIY GEOGRAFIK JIHATLARI
Authors:   Samarqand davlat universiteti, M a m a j o n o v M , D e h q o n o v B
Published: March 2023

Maqolada Andijon viloyatida qishloq xo‘jaligi sohasini rivojlantirish va uni rejali amalga oshirish, qishloq xo‘jaligi mahsulotlarini yetishtirish, samaradorligini oshirish masalalari, yetishtirilgan mahsulotlarni aholini ehtiyojini qondirishdagi, hamda yetishtirilgan mahsulotlarni ichki va tashqi bozorni to‘ldirishdagi ahamiyati haqida ma’lumotlar berilgan. Maqolada viloyat qishloq xo‘jaligini to‘g‘ri samarali rivojlantirish uchun viloyat hududini to‘rtta agroiqlimiy rayonlashtirish haqida fikr bildirilgan bo‘lib, bu sohani rivojlantirish uchun muhim omillardan biri hisoblanadi
XIX ASR IKKINCHI YARMI – XX ASR BOSHLARIDA TURKISTONDA XORIJIY SANOAT KORXONALARI FAOLIYATI
Authors:   Samarqand davlat universiteti, Sh  Rashidova F
Published: March 2023

XIX asr ikkinchi yarmi Turkiston o’lkasi ijtimoiy-iqtisodiy va siyosiy hayotida muhim o’zgaishlarga boy davr sifatida tarix sahifalaridan o’rin oldi. Bu - Rossiya imperiyasining mustamlaka tizimi qaror topishi, rus kapitalining o’lkaga kirib kelishi va o’lka iqtisodiy-ijtimoiy hayotida xorijiy fuqarolar faoliyatining rivojlanishi bilan bog’liq edi. Ushbu maqolada XIX asr ikkinchi yarmi – XX asr boshlarida Turkistonda faoliyat yuritgan xorijiy va mahalliy sanoat korxonalari faoliyati tarixiy manbalar asosida tahlil qilinadi
JADIDCHILIK G’OYALARINING VUJUDGA KELISH TARIXIGA OID FALSAFIY QARASHLAR
Authors:   Samarqand davlat universiteti, S  Ashurova X
Published: March 2023

Maqolada musamlakachilik siyosati natijasida sodir boʼlgan ijtimoiy xayotning oʼzgarishi natijasida vujudga kelgan siyosiy jarayonlar haqida ayrim mulohazalar keltirilgan. Vujudga kelgan qoʼzgʼalonlar natijasi aholining iqtisodiy yashash tarzining tanazzulga yuz tutgani va ayrim xududlarda halq qoʼzgʼalonlarining sodir boʼlishi uning oqibatlari natijasi toʼgʼrisida firklar bildirilgan. Mustamlakachilik oqibatida xalqning maʼnaviy qiyofasida ham ayrim tanazzul xolatlari vujudga kelganligi haqida fikrlar bildirilgan.
BO‘SH VAQT VA UNDAN SAMARALI FOYDALANISH
Authors:   Samarqand davlat universiteti, R  Rustamov F
Published: March 2023

Bugungi kunda “bo‘sh vaqt” va “hordiq” tushunchalari shaxs kamoloti uchun muhim ahamiyat kasb etib bormoqda. Zamonaviy hordiq sanoat va shaharlashuv mahsuli sifatida yangi turdagi hordiq sifatida o‘zgarib bormoqda. Ilmiy-texnik taraqqiyot mehnat unumdorligining o‘sishiga va aholi turmush darajasining yaxshilanib borishiga olib keldi. Bu esa ish uchun zarur bo‘lgan vaqtni qisqartirdi va bo‘sh vaqt miqdorini sezilarli darajada oshirdi. Maqolada “bo‘sh vaqt” va uni samarali tashkil etish haqida so‘z yuritiladi.
O'ZBEKISTONDA AUTIZM SINDROMI VA UNING PSIXOGEN OMILLARI MUAMMOSI
Authors:   Samarqand davlat universiteti, XXX N u r m a t o v a
Published: March 2023

Maqolada autizm muammosinining O'zbekistonda psixologik o'rganilishining amaliy jihatlari keltiriladi. Ushbu ilmiy muammo bo'yicha o'tkazilgan eksperimental tadqiqotlar natijalari beriladi. Muammo yechimlarining psixologik xususiyatlari qisqacha tahlil etiladi. Autizm sindromining genetik xususiyatlari tasvirlangan hamda sindromning klinik belgilari, diagnostika mezonlari va tashxis xususiyatlari keltirilgan.
ИНТЕГРАТИВНАЯ МОДЕЛЬ МОТИВАЦИИ ДОСТИЖЕНЧЕСКОЙ ДЕЯТЕЛЬНОСТИ: СТРУКТУРНЫЙ АНАЛИЗ
Authors:   Samarqand davlat universiteti, Ғ Юлдашев Ж
Published: March 2023

В данной научной статье разъясняется анализ педагогических и психологических особенностей внутренней и внешней мотивации в учебной деятельности, а также организация учебного процесса на научной основе. В статье также описывается качество образования, которое способствует развитию каждого человека, а также определяет культурное развитие общества, рост его экономического благосостояния, а также служит основным источником научно-технического прогресса. Было подчеркнуто, что изучение факторов эффективности учебного процесса должно играть важную роль в современной педагогической психологии. Также приводится информация о когнитивных проявлениях мотивации к учебной деятельности, компонентах автономной подсистемы или мотивационного процесса в мотивации к учебной деятельности, а также о педагогических и психологических особенностях внутренних и внешних мотивов различных проявлений у каждого ребенка.
TA’LIMNING YANGI UFQLARI
Authors:   Samarqand davlat universiteti, X  Kuchkarova F
Published: March 2023

Ushbu maqolada bugungi kunda mamlakatimizda yoshlarni qo’llab- quvvatlash bo’yicha davlat siyosatining asosiy xususiyatlari hamda yoshlarning jamiyatdan munosib o’rinlarini egallashi hamda ularning yetuk va barkamol shaxs bo’lib voyaga yetishlari uchun yaratilib berilayotgan shart-sharoitlar haqida batafsil to’xtalib o’tilgan. Shuningdek, barkamol avlodni tarbiyalashda ta’limning o’rni, bu yo’nalishda amalga oshirilgan ishlar va galdagi vazifalar xususida so’z yuritilgan
SARLAVHALARNING ASOSIY FUNKSIYALARI (nemis tili materiallari asosida)
Authors:   Samarqand davlat universiteti, M u s t a n o v a S h
Published: March 2023

Ushbu maqolada matnga qoʼyilgan sarlavhalarning semantik strukturalari, lingvistik va lingvistik boʼlmagan funksional koʼrsatkichlari, xabar berish, nominativlik, ekspressivlik funksiyalari haqida soʼz yuritiladi. Matn va sarlavha oʼrtasidagi bogʼliqlik, asosiy funksiyalarini amalga oshiradigan leksik-grammatik vositalar nemis tilidagi badiiy asarlardan olingan misollar tahlilida koʼrsatib beriladi.
О ФОНОЛОГИЧЕСКОЙ ХАРАКТЕРИСТИКЕ АДЪЕКТИВНЫХ СЛОВООБРАЗОВАТЕЛЬНЫХ МОРФЕМНЫХ ШВОВ «ПРОИЗВОДЯЩАЯ ОСНОВА + СУФФИКС» РУССКОГО ЯЗЫКА
Authors:   Samarqand davlat universiteti, С Юсупова С , У Нурмухаммедова М
Published: March 2023

В данной статье рассматриваются фонологическая характеристика адъективных словообразовательных морфемных швов, “производящая основа +суффикс” русского языка. Различные структурные типы адъективных морфемных швов, по-разному влияют на характер действия фонетических закономерности в совмешанных фонетических и морфологических позициях.
TA'LIMDA ZAMONAVIY AXBOROT TEXNOLOGIYALARNI QO‘LLASH USULLARI
Authors:   Samarqand davlat universiteti, М A r i p o v   М , I T i l l a y e v   А
Published: March 2023

Ta'limda zamonaviy axborot texnologiyalarini qo‘llash usullari ochib beriladi, jumladan: ta'limni boshqarish tizimi (LMS), ijtimoiy media, bulutli texnologiyalar, mobil ta'lim, smartdarslik, ommaviy ochiq onlayn kurslar (OOOK-MOOC)
INSON KAPITALINI SHAKLLANTIRISHDA TA’LIM TIZIMINING O‘RNI
Authors:   Samarqand davlat universiteti, U s m o n o v a L
Published: March 2023

Ushbu maqolada inson intelektual kapitali barcha turdagi kapitallarning eng qimmatlisi hisoblanishi ko‘rsatilgan. Bu atama bilan biz insonning kasbiy tayyorgarligi, tajribasi va umumiy va maxsus ta’lim orqali egallaydigan to‘plangan bilim, ko‘nikma va malakalarni nazarda tutamiz. Ta’limni kapitalning muhim shakli sifatida ko‘rilishi kerak. Bundan kelib chiqib ushbu maqolada inson kapitalini yuksaltirishda ta’limning o‘rni o‘rganilgan va uni amalga oshirish bo‘ycha tegishli xulosa va tavsiyalar keltirilgan.
DISKRET MATEMATIKA FANINI O‘QITISHDA MASOFAVIY TA’LIM TEXNOLOGIYALARIDAN FOYDALANISHNING USLUBIY JIHATLARI
Authors:   Samarqand davlat universiteti, I  Abdullayeva N
Published: March 2023

Maqolada diskret matematika fanini masofadan o‘qitishning uslubiy jihatlarini “Mulohazalar algebrasi” bo‘limini o‘rganish misolida ko‘rib chiqilgan. Fanni o‘qitishni optimallashtirish maqsadida tayyorlangan on-line komponentini yaratishning ilmiy-uslubiy asoslari xususiyatlari ochib berildi, masofaviy ta’lim texnologiyalaridan foydalanishning afzalliklari tahlil qilindi.
O‘ZBEKISTONDA EKOLOGIYA VA TABIATNI MUHOFAZA QILISH FANINI O‘QITISHDA O‘ZGARISHLAR
Authors:   Samarqand davlat universiteti, S Xushvaqtova X , Dj Sharipova D
Published: March 2023

So'nggi yillarda respublikamizda ekologiya va atrof-muhitni muhofaza qilish masalalariga katta e'tibor berilmoqda. Ushbu maqolalarning dolzarbligidan kelib chiqib, ushbu maqolada so'nggi yillarda O'zbekiston Respublikasida tabiiy resurslarni muhofaza qilish sohasida qabul qilingan qonunlar va qarorlar, shuningdek ekologiya va atrof-muhitni muhofaza qilish fanini o'qitishning o'ziga xos xususiyatlari or‘ganilgan.
FАLSАFIY FIKRLАR TАRАQQIYOTIDА OʼYIN FENOMENI XUSUSIDА ILMIY-NАZАRIY QАRАSHLАR (Yoxan Xeyzinga “Oʼynovchi odam” asari talqinida)
Authors:   Samarqand davlat universiteti, T Kubaeva S h
Published: March 2023

Ushbu maqolada oʼyin tushunchasining falsafiy fikrlar taraqqiyotidagi turli tuman tahlillari haqida soʼz boradi. Xususan, oʼtgan asrda yashab ijod etgan olim Yoxan Xeyzinganing oʼyin tushunchasiga ilmiy-nazariy munosabati bayon etilgan. Olimning mashhur “Oʼynovchi odam” asari asosida oʼyin fenomenining xislatlari, belgilari va funktsiyalari tasnifi keltirib oʼtilgan.
“COVID-19” KORONOVIRUS PANDEMIYASI INFEKSIYASINING MAMLAKATIMIZ IQTISODIYOTINI TURIZM SOHASIGA TA’SIRI
Authors:   Samarqand davlat universiteti, X Djumaev A , R Djumaeva A
Published: March 2023

Ushbu maqolada 2020 yilda O‘zbekistonda ham boshlangan “COVID19” koronovirus pandemiyasi infeksiyasining mamlakatimiz iqtisodiyotiga, xususan, turizm sohasiga ta’siri va u bilan bog‘liq inqiroz sabablari hamda turizmni kelajakda rivojlantirish bo‘yicha ilmiy asoslangan takliflar ko‘rsatilgan.
VIKTORIAN INGLIZ ADABIYOTIDA ADIBALAR NASRI ELIZABET GASKELL IJODI MISOLIDA
Authors:   Samarqand davlat universiteti, M u x a m m e d o v a X
Published: March 2023

Mazkur maqolada ingliz adabiyoti viktorian davri adibasi Elizabet

Gaskell ijodi misolida ijtimoiy psixologik roman xususiyatlari tahlil etilgan
КРУГ «ЗАПАДНО-ВОСТОЧНОЙ» ПРОБЛЕМАТИКИ В РУССКОЙ ЛИТЕРАТУРЕ
Authors:   Samarqand davlat universiteti, Р Кадымова Д
Published: March 2023

Проблема «Россия - Восток - Запад», столь актуальная для

современного мира, волновала русскую литературно-критическую мысль как в XIX

столетии, так и в XX веке. Для России такой интерес к данному вопросу не случаен.

Являясь многонациональным, многоконфессиональным государством, она занимает

территорию, являющуюся как частью Европы, так и частью Азии. В этом кроется

сложность, многогранность российской культуры и особенность ее места в мировом

историко-литературном процесс. Именно поэтому оценки русских ученых, касающиеся

проблемы «Россия-Восток-Запад», создание которых относится к периоду «золотого века»

русской литературы, их анализ сегодня актуален как никогда. История есть опыт,

накопленный человечеством. История литературы содержит в себе варианты ответов на

многие из стоящих перед нами и сегодня острых вопросов.
MAKTAB TA’LIM SIFATI TUSHUNCHASINING MAZMUNI VA UMUMIY OʻRTA TA’LIMDAGI MOHIYATI
Authors:   Samarqand davlat universiteti, J Joʻrayeva N
Published: March 2023

Hozirgi globallashuv jarayonida yoshlar ta’limi va tarbiyasi masalasi

ta’lim soxasining ustuvor yoʻnalishi boʻlib, ta’lim sifatini ta’rifi boʻyicha doimiy

muhokamalar kuzatilmoqda, bunda asosiy urgʻu ta’lim oluvchilarni oʻqishdagi erishgan

yutuqlari, tegishli muassasalarning faoliyati, hamda ta’lim xizmatlarini yetkazib berish sifati

kabi masalalarga qaratilmoqda. Sifat tamoyili nafaqat umumiy oʻrta ta’limni

takomillashtirish, balki ilmiy bilimlarga asoslangan farovon jamiyat qurish sharoitida tegishli

yutuqlarga asoslangan oliy ta’limni takomillashtirishda ham yetakchi hisoblanadi. Ushbu

maqolada maktab ta’limida sifat tushunchasining mazmuni, mohiyati va bu tushuncha

borasida ilmiy tadqiqotchilarning qarashlariga tahliliy yondashilgan.
“SAMARQAND” TOPONIMI VA UNING TALQINI
Authors:   Samarqand davlat universiteti, S G‘oyibov B
Published: March 2023

Ushbu maqolada Markaziy Osiyoning eng qadimiy shaharlaridan biri bo‘lgan

Samarqand tarixi va “Samarqand” toponimining kelib chiqishi to‘gʻrisida muallifning mulohazalari

ilgari surilgan. Maqolada mavzuga doir turli tillardagi bir qancha manba va ilmiy adabiyotlar tahlil

qilingan holda “Samarqand” toponimining mohiyati ochib berilgan. Muallif shahar nomini uning

geografik joylashuvidan kelib chiqqan holda talqin qilish maqsadga muvofiqligini o‘z xulosalarida

keltirib o‘tadi.
ITALIYADA O‘RTA ASR ARABSHUNOSLIK TARJIMA MARKAZLARINING SHAKLLANISHIGA TA'SIR KO‘RSATGAN TARIXIY OMILLAR
Authors:   Samarqand davlat universiteti, V Mahmudov O
Published: March 2023

Maqolada lotin va Arab tilli manbalar tahlili asosida Sitsiliya hamda Italiyada

o‘rta asr arabshunoslik tarjima markazlarini shakllanishiga ta'sir ko‘rsatgan tarixiy omillar aniqlanib,

mazkur hududlarda Arab tilidagi asarlarning tarqalishi al-Andalusda bo‘lgani kabi musulmonlar

hukmronligi davrida emas, balki hududda xristianlar hokimiyati qayta tiklangach yuz berganligi

dalillangan
IJTIMOIY-MA’NAVIY MUHITNI TASHKIL ETISH VA BOSHQARISH MEXANIZMLARINI TAKOMILLASHTIRISHNING NAZARIY VA AMALIY AHAMIYATI
Authors:   Samarqand davlat universiteti, B o y z a q o v a U
Published: March 2023

Ijtimoiy-ma'naviy muhitni tashkil etish, uning baraqarorligini ta'minlash

masalalari avvalgidan ham dolzarb ahamiyat kasb etmoqda. Jamiyatda, tashkilotda va muassasada,

shaxslar o‘rtasida jtimoiy muhitni tashkil etish va boshqarish mexanizmlari menejmenti hamda

pedagogika fanining muhim yo‘nalishlaridan biriga aylanganining asosiy sababi ham shundadir.
AXLOQIY BEGONALASHUV - MADANIY BEGONALASHUVINING ASOSIY OMILI SIFATIDA
Authors:   Samarqand davlat universiteti, XXX XXX
Published: March 2023

Ushbu maqolada yoshlarning axloqiy begonalashuvi madaniy

begonalashuvining asosiy omili ekanligi yoritilgan bo‘lib, bu asosan jamiyatdagi xulq-atvor

me'yorlarini chetlab o‘tish, “ommaviy madaniyat” ning ta'siri ostida sodir bo‘lishi yoritib berilgan.
TEXNIKA OLIY TA`LIM MUASSASALARI TALABALARIDA TEXNOLOGIK DETERMINIZM KONSEPSIYASI ASOSLARIGA DOIR BILIMLARNI TAKOMILLASHTIRISH TEXNOLOGIYASI
Authors:   Samarqand davlat universiteti, G‘ Obidov J
Published: March 2023

Ushbu maqolada texnika oliy ta`lim muassasalari talabalarida texnologik

determizm konsepsiyasi asoslariga doir bilimlarni takomillashtirish texnologiyasi, ta`lim amaliyotida

ta`limiy, pedagogik, tarbiyaviy, o‘qitish texnologiyalari ajratib ko‘rsatilishi keltirilgan. Jumladan,

mazkur ilmiy maqolada o‘qitish texnologiyasni ishlab chiqshish va bu orqali texnika oliy ta`lim

muassasalari talabalarida texnologik determinizm kontseptsiyasi asoslariga doir bilimlarni

rivojlantirish samaradorligiga erishish imkoniyatlari ko‘rsatib berilgan
INKLYUZIV TAʼLIM SHAROITIDA MAXSUS PEDAGOGIKADA DEFEKTOLOGO‘ QITUVCHI METODIK TAYYORGARLIGINING O‘RNI
Authors:   Samarqand davlat universiteti, A Daminova M
Published: March 2023

Maqola inklyuziv taʼlim dasturlari, edagogic hujjatlar, ilmiy tadqiqot natijalari

va tahlillari asosida bayon etilgan. Yangi qiyofadagi maxsus taʼlim tizimini shakllantirish, inklyuziv

taʼlim muhitini yaratish borasidagi islohotlar edagogic sharoitning tubdan o‘zgarishiga olib kelishi

ko‘rsatib berilgan. O‘z navbatida, inklyuziv taʼlim sharoitida sog‘lom hamda turli darajadagi alohida

taʼlim ehtiyojlari mavjud bo‘lgan bolalardagi xilma-xillikni boricha qabul qilish zaruriyatining yanada

kuchayishi natijasida defektolog-o‘qituvchi faoliyatida ochiladigan yangi jihatlar asoslab berilgan
VIRTUAL DUNYODAGI LAQAB –NIKNEYMLAR XUSUSIDA
Authors:   Samarqand davlat universiteti, X u s a n o v a Z
Published: March 2023

Internet tarmogʻining rivojlanish natijasida ijtimoiy tarmoqlarning ommalashishi insonlar orasidagi ijtimoiy muloqotning bir qismini virtual olamga koʻchishiga sabab boʻldi. Buning oqibatida jamiyatda tildan foydalanishda juda koʻp oʻzgarishlar sodir boʻlmoqda. Buni, ayniqsa, yoshlar nutqida kuzatishimiz mumkin. Bundan tashqari, tilimizga juda koʻplab yangi soʻz va iboralar kirib kelmoqda. Ushbu kichik tadqiqot dunyoda internet tarmogʻinig rivojlanib borishi, yurtimizda paydo boʻlishi va taraqqiyoti, ijtimoiy tarmoqlarning ommalashishi natijasida tilimizdagi paydo boʻlgan birtual nomlar – nikneymlar tahliliga bagʻishlangan. Shuningdek, tilimizda ijtimoiy faol qoʻllaniladigan laqablarni bir koʻrinish boʻlgan nikneymlarning paydo boʻlishi va asoslari, tarkibi, me’yoriy talablari, ommalashish sabablarini oʻrganilgan.
FRAZEOLOGIK BIRLIKLARDA MADANIYATLARARO XUSUSIYATLAR
Authors:   Samarqand davlat universiteti, R Kazakov I
Published: March 2023

Мaqolada qardosh tillar doirasidagi antroponim komponentli frazeologik birliklarning madaniyatlararo umumiy va xususiy jihatlari o‘rganilgan. Antroponim komponentli frazeologizmlarda har qanday millatning ramzi aks etishi aniqlangan. Bunday frazeologizmlar etimologiyasini mukammal darajada bilish muhim ahamiyat kasb etishi misollar orqali yoritilgan. O‘zbek va qoraqalpoq tillari tabiatining yashirin sirlari ular madaniyatidan guvohlik beruvchi antroponim komponentli frazeologik birliklarda jamlanganligi isbotlangan. Umuman, har qaysi tilning frazeologizmlar qatlami o‘sha millat tarixi, milliy-madaniyati, urf-odat va qadriyatlariga bevosita aloqador ekanligi belgilangan. Ko‘pchilik hollarda bu kabi birliklar komponentlarining o‘xshashligi kuzatilsa, ba’zi o‘rinlarda shu xalqlarning o‘zlarigagina xos milliy-madaniy qiyofa namoyon bo‘lishi ko‘rsatilgan
INGLIZ SHAXSIY RIVOJLANISH LINGVODISKURSIDA HAYOT BILAN BOG‘LIQ KONSEPTUAL METAFORALAR
Authors:   Samarqand davlat universiteti, A Fayziyeva A
Published: March 2023

Mazkur maqolada ingliz tilida yaratilgan shaxsiy rivojlanish adabiyotlarida qo‘llanilgan hayot konseptiga oid konseptual metaforalar tahlili keltirilgan. Insonning hayot kabi mavhum tushunchalarni anglashi, uni kommunikasiyada verballashtirishi turli konseptual metaforalar yordamida amalga oshiriladi, jumladan, hayot – sayohat, hayot – yo‘l, hayot – hikoya, hayot – kurash kabi metaforik modellar tahlil qilingan asarlarda eng ko‘p uchradi.
INGLIZ PUNKTUATSIYASINING XUSUSIY EVOLYUTSIYASI VA ZAMONAVIY AN’ANALARI
Authors:   Samarqand davlat universiteti, M To‘rayeva D
Published: March 2023

Zamonaviy punktuatsiyada xususiy punktuasion me'yorlarning paydo bo‘lishi turli tillarda shu til mansub jamiyatning ijtimoiy-madaniy, iqtisodiy-siyosiy taraqqiyoti, qolaversa, axborotkommunikativ texnologiyalarning rivojlanishi, virtual muloqot shakllarining ko‘payishi bilan bog‘lanadi. Amaldagi punktuatsion tizimning taraqqiyotida ingliz punktuatsiyasining roli muhim. U punktuatsiyaning klassik an'analari bilan uyg‘unlashgan zamonaviy konsepsiyalari, xususan, ayrim tinish belgilarining funksional evolyutsiyasi negizida shakllandi.
КОННОТАЦИИ ВОКРУГ ЛЕКСЕМЫ «РЫБА» В РАЗНОСИСТЕМНЫХ ЯЗЫКАХ
Authors:   Samarqand davlat universiteti, Ж Латипов О
Published: March 2023

Статья посвящена изучению переносных значений ихтиологической лексики разносистемных языков: русского, узбекского, английского и немецкого. В ней приведены сведения о работах ученых, исследовавших ихтиологическую лексику, раскрыты коннотативные значения лексем, связанных с названием рыб в составе устойчивых сочетаний слов сопоставляемых языков, даны примеры их функционирования в текстах художественной литературы, а также выявлены соответствия клишированных единиц с ключевым словом “рыба” в четырех неродственных языках.
O‘ZBEK TILI MILLIY KORPUSINI YARATISHDA DASTLABKI MA’LUMOTLAR
Authors:   Samarqand davlat universiteti, S Tursunov M
Published: March 2023

Ushbu maqolada, o‘zbek tili milliy korpusi yaratilishida paydo bo‘lgan nazariy va amaliy masalalar keltirilgan. O‘zbek tili milliy korpusi zamonaviy o‘zbek tili uchun muvozanatli, katta hajmdagi va umumiy maqsadli korpus sifatida yaratiladi. Korpusni yaratishdan avval bajarilgan nazariy va amaliy usullardan foydalaniladi. Barcha jarayonlar davomida dasturiy ta’minotning turli xil turlari muayyan vazifalar uchun ishlatiladi va yaratilgan korpus notijorat maqsadlarda foydalanish uchun bepul manba hisoblanadi. Ushbu maqolada o‘zbek tili milliy korpusining xususiyatlari, vebga asoslangan korpus boshqaruv tizimi, rejalashtirilgan ish oqimi va vebga asoslangan foydalanuvchi interfeysini taqdim etilgan
TA`LIM 4.0 - RAQAMLI TRANSFORMATSIYA OMILLARI
Authors:   Samarqand davlat universiteti, Sh Usmonov B , K Kodirov M
Published: March 2023

Globallashuv va jadal texnologik taraqqiyot odamlarning birgalikda yashash tarzini va mehnat dunyosini o‘zgartirganligi sababli, ta`lim tizimlari jamiyat va jahon iqtisodiyotining haqiqati va ehtiyojlaridan uzilib qoldi. Biroq, global miqyosda darslarning to‘xtatilishiga sabab bo‘lgan KOVID-19 virusi pandemiyasi ta`limning raqamli transformatsiyasi uchun katalizator bo‘lib qolmoqda. Ta`limdagi raqamli transformatsiya texnologiyadan foydalanishdan tashqari, talabalar va o‘qituvchilarga zarur bo‘lgan raqamli ko‘nikmalarni, shuningdek, innovatsion pedagogik usullar va amaliyotlarni joriy etishni o‘z ichiga oladi. Ushbu ish xalqaro ma’lumot tashkilotlari hujjatlarini tahlil qilish natijasida ta`lim 4.0 ga raqamli transformatsiya strategiyasini yo‘naltirishi kerak bo‘lgan tashkiliy, texnologik va insoniy omillarning kombinatsiyasidir.
ФАКТОРЫ ЭФФЕКТИВНОСТИ ПРОЦЕССА ФОРМИРОВАНИЯ И РАЗВИТИЯ КРЕАТИВНОЙ САМОРЕГУЛЯЦИИ У БУДУЩИХ ПЕДАГОГОВ
Authors:   Samarqand davlat universiteti, Ю Мусинова Р
Published: March 2023

В статье в соответствии целью и задачами настоящей время было организовано и проведено эмпирическое исследование посвящённое изучению эффективности подготовленной тренинговой программы направленной на формирования и развития креативной саморегуляции будущих педагогов. Проведенный анализ научной литературы по исследуемой проблеме показывает, что по оценке эффективности проведенной работы встречаются сведения о различных средствах средствах формирования эффективности изучаемого психологического явления.
AГРЕССИВНOЕ ПOВЕДЕНИЕ ДЕТЕЙ КAК СOЦИAЛЬНAЯ, ПЕДAГOГИЧЕСКAЯ И ПСИXOЛOГИЧЕСКAЯ ПРOБЛЕМA
Authors:   Samarqand davlat universiteti, Д Бoймирзaевa Д
Published: March 2023

В дaннoй стaтье oписывaется aгрессивнoе пoведение детей кaк oднo из сoциaльныx, педaгoгическиx и псиxoлoгическиx прoблем, тaк кaк нaпряженнaя, неустoйчивaя сoциaльнaя, экoнoмическaя, экoлoгическaя oбстaнoвкa, слoжившaяся в нaстoящее время в нaшем oбществе пoрoждaет пoвышенную тревoжнoсть, дуxoвную oпустoшеннoсть, влекущие зa сoбoй жестoкoсть и aгрессивнoсть.
Use of bag-mask ventilation for cardiopulmonary resuscitation: Do we need more evidence for low resource setting?
Authors: Rijal Suraj
Published: March 2023

Clinical Question: Can victims of cardiac arrest be managed without endotracheal intubation in resource-limited settings without compromising survival with good neurologic outcomes? 

Article Chosen: Jabre P, Penaloza A, Pinero D, et al. Effect of Bag-Mask Ventilation versus Endotracheal Intubation During Cardiopulmonary Resuscitation on Neurological Outcome After Out-of-Hospital Cardiorespiratory Arrest: A Randomized Clinical Trial. JAMA. 2018;319(8):779â€“787. doi:10.1001/jama.2018.0156

Objective: To assess the non-inferiority of bag-mask valve ventilation versus endotracheal intubation for advanced airway management with regard to survival with favorable neurological outcome at 28 days.

Conclusion: Among several take away from this paper, our conclusion is why not to continue bag and mask ventilation if working well instead of switching to endotracheal intubation while doing cardiopulmonary resuscitation in a cardiac arrest patient.
Ruptured heterotopic pregnancy: a case report
Authors: Mishra Abhishek , Gaire Sushila , K.C Bipana , Mahat Pradeep , Neupane Jeevan , Chaubey Mandip Kumar
Published: March 2023

Heterotopic pregnancy is a rare condition when at least two pregnancies are present simultaneously at different implantation sites and only one is located in the uterine cavity. The majority of cases are diagnosed in the first trimester. Heterotopic gestation is very rare in natural conception. A high index of suspicion is required for timely diagnosis and appropriate intervention. We report a case of heterotopic pregnancy in a 26-year-old woman presented with hemoperitoneum from ruptured tubal pregnancy with live intrauterine gestation at 8 weeks of amenorrhea, diagnosed on ultrasound examination. She underwent exploratory laparotomy with right salpingectomy and post-operative period was uneventful.
General practitioners practicing anesthesia care in rural Nepal: rewards and challenges
Authors: Dangal Binod , Neupane Ayush , Dhungana Rakshya , Shah Kashim
Published: March 2023

Safe and accessible anesthetic care is critically limited in Asian countries. Perioperative anesthesia related complications are higher in resource limited countries. Neuraxial regional anesthesia is becoming popular and considered as anesthesia of choice in surgeries below umbilicus due to its safety, accessibility, efficacy and low cost. Due to limited numbers of anesthetists and anesthesia assistants, Medical Doctorate in General Practice (MPGP) are widely practicing different types of anesthetic care and performing varieties of surgeries in remote Nepal. Effective coordination, task sharing approach, clinical updates and specific training programs are required to strengthen anesthetic care of general practitioners in rural Nepal.
Twelve-month contraceptive discontinuation, associated factors and its consequences in Nepal
Authors: Bhandary Shital
Published: March 2023

Introduction: Contraceptive prevalence rate (CPR) remained stagnant in Nepal in the past ten years and Nepal failed to achieve the millennium development goals target on CPR in 2015. Since CPR is based on the use of contraceptives, it is extremely important to assess contraceptive discontinuation rates to find the reason for this stalemate in the country.

 

Method: The 2016 Nepal Demographic and Health Survey contraceptive calendar data was used to get all the episodes of contraceptive use within one year. It was used to find discontinuation rates by methods, reasons, and associated factors. Pearson’s chi-square test was used to compare discontinuation rates across predictor variable categories and a multivariate logistic regression model was used to find independent factors of discontinuation rates.

 

Result: Nepal reported a twelve-month contraceptive discontinuation rate of 64.4% along with higher discontinuation of modern methods (pill, intra-uterine device, injectable and male condom) and traditional methods (rhythm and withdrawal) than India and Bangladesh in 2016. Most women cited ‘side effects’ and ‘wanted more effective method” as the main reason for the discontinuation of modern methods whereas ‘method failure’ and ‘desire to become pregnant’ as the main reasons for the discontinuation of traditional methods. The bivariate analysis found age, province, education level, and wealth indices as the main predictor whereas multivariate analysis found province and education level as the independent factors of twelve-month discontinuation rates in Nepal.

 

Conclusion: Stagnant unmet need for family planning and higher contraceptive discontinuation were responsible for the stagnation of the contraceptive prevalence rate in Nepal since 2006. Province and education were independent predictors of the twelve-month discontinuation rate in Nepal in 2016. Further analysis of discontinuation “while in need” is needed to assess the family planning plans, policies, and programs of Nepal at the national, provincial, and local levels to improve the contraceptive prevalence rate in the country.
Dermatological manifestations during COVID-19 pandemic â€“ Case series from Nepal
Authors: Shrestha Rushma , Parajuli Niraj , Amatya Amit
Published: March 2023

SARSCov-2 infection primarily targets the respiratory system, but other organs, including skin can also be affected with varied manifestations. The most common dermatological findings of COVID-19 include urticarial, maculopapular rash, papulovesicular exanthema, chilblain-like acral pattern, livedoreticularis-like pattern and purpuric â€œvasculiticâ€ pattern. Here, we present a case series with skin findings in COVID-19 from Nepal.
Predictors of hepatorenal syndrome in patient with decompensated liver cirrhosis
Authors: Karki Sanjit , Shrestha Roshan , Shah Manoj , Shrestha Ramila , Paudel Bidhan Nidhi
Published: March 2023

Introduction: Hepatorenal syndrome (HRS) is one of the severe complications of decompensated liver cirrhosis which has poor outcome. Predictive models are important aspect in assessment of high risk patient.

Method: This prospective analytical study was conducted in Gastroenterology unit of Bir hospital from December 2018 to April 2020. Seventy patient of liver cirrhosis with ascites (CTP score 7 or more) were followed for a period of three months. The outcome of study was hepatorenal syndrome. Predictors were assessed from baseline variables.

Result: Total 65 patients completed the study. The mean age of study population was 47.38 Â±11.38 years and 52(80%) were male. The most common aetiology was alcohol 55(84 %). Eight (12.5%) developed HRS. Hepatorenal syndrome was precipitated by spontaneous bacterial peritonitis 5(62.5%), upper gastrointestinal bleeding 2(25%) and unknown 1(12.5%). In Bivariate analysis total leucocyte count, Serum sodium, Model for End-stage Liver Disease â€“ Sodium (MELD- Na), serum bilirubin and use of rifaximin were predictors of HRS. Only use of rifaximin was the predictor in multivariate analysis.

Conclusion: Serum sodium, bilirubin and MELD Na are important predictors of the hepatorenal syndrome. Rifaximin use may be preventive for HRS.

Keywords:  Decompensation, hepatorenal syndrome, liver cirrhosis, predictors
Establishment of Nepalâ€™s first Provincial Infectious and Communicable Disease Hospital in Gandaki Province
Authors: Gauchan Bikash
Published: March 2023

In December 2019, Sudden deaths of people due to pneumonia caused by the new Coronavirus (SARS-Cov-2) in Wuhan, China and its rapid spread to other countries forced World Health Organization to declare pandemic on 12 March 2021. With first case on 13 January 2020, Nepal started preparing to manage COVID â€“ 19. The government of Nepal made historic decision to establish an infectious and communicable disease hospital in each province. The Gandaki province government decided to establish provincial infectious and communicable disease hospital on 12th April 2020. The newly established hospital has now become Nepalâ€™s first provincial infectious and communicable disease hospital. Future research will establish the effectiveness of provincial dedicated infectious and communicable disease hospital.
Factors affecting problematic use of psychoactive substances among Bachelor level students: A mixed methods study from Hill and Terai of Nepal
Authors: Basnet Puspa , Devkota Gaurav , Sagtani Reshu Agrawal , Bhandary Shital
Published: March 2023

Introduction: Adolescents start experimenting with licit substances which later worsen to use of more addictive illicit substances. Genetic and environmental vulnerabilities affect use of psychoactive substances with family support, competence, and psychological well-being acting as protective factors. This study aimed to identify the prevalence of problematic use of psychoactive substances among Bachelor level students and factors affecting the problematic use.

Method: A cross-sectional study was conducted among 50 Bachelor level students selected purposively from a private college of Kathmandu metropolitan city and five In-depth and Key Informant interviews of Bachelor level students, guardian, and teachers from Kohalpur municipality. Cronbachâ€™s alpha was calculated for each of the tools used and prevalence of problematic use of psychoactive substances was assessed.

Result: Prevalence of problematic use of psychoactive substances among lifetime users was 51.4%. The factors significantly associated with problematic use of psychoactive substances were sex and social discrediting by peers. Qualitative analysis identified many risk and protective factors at individual, interpersonal, and socio-cultural level.

Conclusion: High prevalence of lifetime psychoactive substance use and high percentage of problematic use of psychoactive substances among substance users requires intervention at different socio-ecological level.
Narrativas históricas de jóvenes e historia reciente en Chile: aproximaciones deshistorizadas, fragmentadas y polarizadas en la escuela pública
Authors: Rubio Soto Graciela , González Calderón Fabián
Published: March 2023

Este artículo presenta los resultados de una investigación sobre las configuraciones de la memoria en estudiantes de enseñanza media de la ciudad de Valparaíso. Las concepciones de la historia, la memoria y las narrativas históricas de los conflictos políticos en la historia reciente de Chile (1965-2017) fueron abordadas a través de una metodología de estudio de casos y grupos focales en los que participaron estudiantes de cinco escuelas públicas que terminan su educación secundaria. El análisis discursivo de las elaboraciones de memoria muestra patrones narrativos históricos sobre el pasado reciente conformados por visiones deshistorizadas, fragmentadas, polarizadas y románticas de la historia, fuertemente influenciadas por el poder, las desigualdades y la memoria popular. En la parte final, reflexionamos sobre la incidencia de estas configuraciones narrativas en la relación con el pasado en las nuevas generaciones y sus efectos en sus disposiciones políticas.
LITHIUM HAS NEUROPROTECTIVE EFFECT ON NEUROBLASTOMA CELL LINE IN LOW DOSAGES
Authors: GÜRAN Şefik , ÇOBAN Zehra , GÜNDEŞLİ Hülya , KILIÇARSLAN Özgür
Published: March 2023

Lithium (Li) was presented as a protective agent in neuron degeneration which is an important process in neurodegenerative diseases. The aim of this study was to determine the effect of certain amounts of Li on neuroblastoma cells by considering several specific genes which act on neuroprotection. Li solutions were prepared as 1 μM, 15 μM (low dosage), 30 μM and 45 µM (high dosage) concentrations then applied to neuroblastoma cell line. XTT and trypan blue assays were performed to determine the cell proliferation and viability, respectively. mRNA expression levels of NES, BDNF, GRIN2A, LRRK2, PRKN, and SNCA were detected by quantitative real time polymerase chain reaction (qRT-PCR). Cell viability detected as significantly increased in cells treated with low dosage Li however, it was significantly decreased in high dosage applied cells compared to untreated control. In addition, cell proliferation ratios were significantly decreased in high dosage applied cells compared to control. It was demonstrated that mRNA expression levels of several genes (NES, LRRK2, PRKN) were significantly upregulated. Regarding to BDNF, expression of the gene was significantly upregulated in the cells only treated with very low amount of Li. However, no significant data could be obtained for GRIN2A. Furthermore, mRNA expression level of SNCA was determined as significantly downregulated compared to control. Statistically significant expression of NES, LRRK2, PRKN, BDNF and SNCA genes due to the variable Li concentrations applied to cells suggests that Li acts on transcriptional regulation of certain genes associated with neuronal survival. These findings support that dose dependent Li treatment might have a protective effect for neurodegenerative diseases.
Desenvolvimentismos: entre a epistemologia inflexível e o relativismo absoluto
Authors: Alves Corrêa Leonardo , Riceputi Alcântara Marcelo
Published: March 2023

Através da combinação de leituras das evoluções históricas das Ciências Sociais e da Ciência Econômica até o contemporâneo, presente trabalho propõe-se a identificar elementos mínimos configuradores de um framework da Ciência Econômica como hodiernamente adequado a prestar suporte descritivo ao Direito Econômico. Suscita, então, da adequação do framework da obra de Karl Polany para tanto, bem como de seu potencial caráter contributivo quando do labor hermenêutico sobre a Constituição da República Federativa do Brasil de 1988.
The Experience of Using Digital Technologies in the Financial Sector in Order to Ensure Economic Security in Russia and Abroad
Authors: Afanasyeva Lyubov Viktorovna , Evloeva Alina Borisovna
Published: March 2023

The subject of the study is the analysis of the main areas of application of artificial intelligence technologies in the financial sector based on domestic and foreign practice, the object is artificial intelligence technologies in order to ensure economic security. The authors note that the possibilities of using artificial intelligence in the financial sector have been developing rapidly in recent years, bringing significant benefits in terms of efficiency, increased accuracy and cost-effectiveness. The development of digital technologies leads to the creation of new services that help increase the level of economic security. AI-based solutions are used in various areas of finance, including risk management, fraud detection, customer service, trading and investment analysis. This study examines the current state and future potential of artificial intelligence in the financial sector, the advantages and disadvantages of using such technologies, as well as recent trends and developments in this area. The information base of the study was made up of analytical materials of the Central Bank of the Russian Federation, scientific reports, reports of international consulting companies, studies of foreign IT corporations, scientific publications and statistical data of the Federal State Statistics Service. It is noted that artificial intelligence has the potential to transform the financial market, is an important tool for ensuring economic security. It allows you to create more secure and reliable financial management systems, as well as increase the transparency and efficiency of financial transactions. Similarly, artificial intelligence can also revolutionize tax administration by facilitating compliance and risk management, reducing errors and fraud, and increasing transparency and fairness in the tax system. The use of artificial intelligence in finance and taxation is expected to increase significantly in the coming years, with new solutions constantly emerging that can simplify and automate financial processes.
Small angle X-ray scattering and positron annihilation spectroscopy of polyethyleneimine functionalized ordered mesoporous silica SBA-15 microstructure
Authors: Yin Hao , Song Tong , Peng Xiong-Gang , Zhang Peng , Yu Run-Sheng , Chen Zhe , Cao Xing-Zhong , Wang Bao-Yi ,   Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China,   School of Materials Science and Engineering, Wuhan Institute of Technology, Wuhan 430205, China,   China Automotive Technology & Research Center Co., Ltd., Tianjin 300162, China,   University of Chinese Academy of Sciences, Beijing 101408, China
Published: March 2023

Owing to its advantages of high specific surface area, large pore volume, adjustable pore size, good thermal stability and relatively low cost, SBA-15 has a wide range of application prospects in adsorption, separation, catalysis, nanomaterials and other fields. And the use of organic functional groups to modify SBA-15 has become one of the hot spots of research on materials, but the introduction of organic functional groups will inevitably affect the pore structure of material, affecting its performance. Therefore, how to more comprehensively characterize the pore structure of material has received much attention. In this work, small angle X-ray scattering (SAXS) technique is used to characterize the pore structure of PEI/SBA-15 mesoporous molecular sieve. The pore structure and periodicity information of PEI/SBA-15 are obtained by using correlation function and string length distribution theory, and compared with those obtained by positron annihilation lifetime spectroscopy (PALS) technique. The results show that the periodic structure of PEI/SBA-15 mesoporous molecular sieve does not change significantly with the increase of PEI mass percent, and the pore size of PEI/SBA-15 mesoporous molecular sieve only decreases from 8.3 nm to 7.6 nm by the chord length distribution function. Two long-life components, τ3 and τ4, are obtained by PALS, and τ3 reflects the random pores structure in SBA-15 matrix, while τ4 denotes the size of SBA-15 hexagonal pores. Compared with the results of SAXS, the mesoporous pore size obtained by PALS technique shows the same trend. By combining SAXS technique and PALS technique, the evolution of material microstructure can be revealed in more depth, thus providing a unique method for studying the structural characterization of functional nanocomposites in the future.