bluuebunny/crossref_metadata_2025 huggingface dataset:
ĐÁNH GIÁ KẾT QUẢ ĐIỀU TRỊ BẢO TỒN GÃY THÂN HAI XƯƠNG CẲNG TAY TRẺ EM TẠI BỆNH VIỆN HỮU NGHỊ VIỆT ĐỨC
Authors: Đình Toàn Dương , Như Dũng Lê
Published: April 2022

Đa số là gãy cành tươi, nắn bó dễ, xương dễ liền, gấp góc 10-20 độ vẫn có thể chấp nhận vì xương trẻ em khả năng tự bình chỉnh. Mục tiêu: Đánh giá kết quả điều trị bảo tồn gãy thân hai xương cẳng tay trẻ em tại khoa khám xương và điều trị ngoại trú Bệnh viện Hữu nghị Việt Đức. Phương pháp: mô tả tiến cứu trên 71 trẻ em dưới 16 tuổi, được chẩn đoán xác định gãy kín thân 2 xương cẳng tay, được điều trị bảo tồn bằng kéo nắn bó bột tại khoa Khám xương và điều trị ngoại trú bệnh viện hữu nghị Việt Đức. Đánh giá kết quả theo tiêu chuẩn Anderson. Kết quả: tốt 90,1%, kết quả tốt 7,1%, trung bình là 2,8%  không có kết quả kém. Kết luận: Gãy xương cẳng tay trẻ em hơn nửa là gãy gãy ít lệch kiểu cành tươi, điều trị bảo tồn mang kết quả khả quan
NGHIÊN CỨU XÂY DỰNG QUY TRÌNH ĐỊNH LƯỢNG ĐỒNG THỜI SALBUTAMOL, RACTOPAMNE VÀ CLENBUTEROL TỒN DƯ TRONG GÀ BẰNG PHƯƠNG PHÁP SẮC KÝ LỎNG KHỐI PHỔ
Authors: Thị Hồng Vân Nguyễn , Hồng Huế Ngô , Xuân  Năng Phạm , Thị Hương Lan Đỗ , Thị Liên Nguyễn , Văn Mến Chử
Published: April 2022

Trong nghiên cứu này chúng tôi đã phát triển một phương pháp định lượng nhanh và chính xác Salbutamol, Ractopamine và Clenbuterol tồn dư trong thịt gia cầm bằng máy sắc ký khối phổ siêu hiệu năng UPLC-MS/MS. Điều kiện của khối phổ gồm cột sắc ký: C18; 100 × 2,1mm; 1,7µm, pha động: ACN (0,1% acid formic): 0,1% acid formic/H20 (tỷ lệ thích hợp) tốc độ dòng: 0,2 mL/phút, thể tích tiêm: 1µL. Phương pháp của chúng tôi đã trình bày kết quả khả quan về độ nhạy, độ chính xác và độ thu hồi của Salbutamol, Ractopamine và Clenbuterol tồn dư trong thịt gia cầm. Phương pháp này đã được chứng minh là nhanh chóng, đáng tin cậy và lặp lại tốt để phân tích chính xác Salbutamol, Ractopamine và Clenbuterol
HIỆU QUẢ ĐIỀU TRỊ NHẠY CẢM NGÀ CỦA KEM ĐÁNH RĂNG SENSITIVE MINERAL EXPERT BY PS Ở SINH VIÊN TRƯỜNG ĐẠI HỌC Y DƯỢC – ĐẠI HỌC QUỐC GIA HÀ NỘI
Authors: Thị Ngọc Anh Trần , Diệu Hồng Đinh , Đình Hải Trịnh , Lê Phương Vũ , Thị Mai Anh Trương , Thị Thu Hương Đỗ
Published: April 2022

Mục tiêu: Nhận xét hiệu quả điều trị nhạy cảm ngà của kem đánh răng Sensitive Mineral Expert By P/S ở sinh viên Trường Đại học Y Dược – Đại học Quốc Gia Hà Nội. Đối tượng và phương pháp nghiên cứu: 33 sinh viên Trường Đại học Y Dược – Đại học Quốc Gia Hà Nội với 82 răng nhạy cảm ngà tham gia nghiên cứu. Tiến hành nghiên cứu can thiệp lâm sàng không đối chứng. Kết quả: Tỷ lệ ê buốt răng giảm 89% sau 4 tuần can thiệp.
TẮC TĨNH MẠCH VÕNG MẠC SAU TIÊM VẮC XIN CỦA HÃNG ASTRAZENECA: BÁO CÁO MỘT SỐ CA LÂM SÀNG
Authors: Đại Dương Lương , Thị Như Ngọc Trần , Thị Quỳnh Nguyễn
Published: April 2022

Tắc tĩnh mạch võng mạc là bệnh hiếm gặp ở người trẻ khỏe mạnh, không có bệnh nền kèm theo. Tuy nhiên gần đây, tại khoa Đáy Mắt – Bệnh viện Mắt Hà Nội, chúng tôi đã ghi nhận về ba trường hợp người trẻ tuổi, tiền sử khỏe mạnh được chẩn đoán tắc tĩnh mạch võng mạc sau tiêm vắc xin Astrazeneca dự phòng COVID – 19. Bệnh biểu hiện bằng giảm thị lực đột ngột hoặc khuyết một phần thị trường sau tiêm từ 7-10 ngày. Bệnh nhân được điều trị bằng tiêm nội nhãn Anti–VEGF hoặc theo dõi đơn thuần. Kết quả cho thấy, thị lực của ba bệnh nhân đều cải thiện tốt, tình trạng phù hoàng điểm trên OCT giảm rõ rệt. Do vậy, cần chú ý theo dõi và phát hiện tình trạng tắc mạch võng mạc sau tiêm vắc xin Astrazeneca
ĐẶC ĐIỂM NỒNG ĐỘ HOMOCYSTEIN Ở BỆNH NHÂN ĐÁI THÁO ĐƯỜNG TÍP 2 CÓ LOÉT BÀN CHÂN
Authors: Thế Long Bùi , Văn Đệ Đoàn , Mỹ Hạnh Bùi
Published: April 2022

Mục tiêu: Khảo sát đặc điểm nồng độ homocystein (Hcy) ở bệnh nhân đái tháo đường típ 2 có loét bàn chân. Đối tượng và phương pháp nghiên cứu: 401 đối tượng là bệnh nhân đang điều trị nội trú tại Bệnh viện Nội tiết Trung ương từ tháng 11/2014 (47 bệnh nhân nhóm chứng, 176 bệnh nhân ĐTĐ típ 2 có loét bàn chân, 178 bệnh nhân ĐTĐ típ 2 không loét bàn chân). Phương pháp nghiên cứu: Nghiên cứu mô tả cắt ngang. Kết quả: Nồng độ Homocytein trung bình nhóm chứng 7,49± 1,25; nhóm ĐTĐ không LBC 9,38 ± 4,96 và ĐTĐ có LBC 12,69 ± 4,91  (p<0,001). Nồng độ Homocystein ở nam cao hơn nữ (ĐTĐ có LBC: nữ 13,66 ± 4,86, nam 11,27 ± 4,66; ĐTĐ không LBC: nữ 10,43 ± 5,34, nam 8,70 ± 2,76; p<0,05). Nồng độ Homocystein ở bệnh nhân THA cao hơn không THA (ĐTĐ có LBC: THA 13,28 ± 5,04, không THA 11,16 ± 4,23; ĐTĐ không LBC: THA 10,59 ± 5,29, không THA 8,39 ± 2,23; p<0,05)  Kết luận: Nồng độ homocystein nhóm ĐTĐ có LBC cao hơn nhóm ĐTĐ không LBC và nhóm chứng. Nồng độ homocystein ở nam cao hơn nữ; bệnh nhân THA cao hơn bệnh nhân không THA.
ĐÁNH GIÁ KẾT QUẢ SỬ DỤNG ĐOẠN TM BẢO QUẢN ĐỂ TẠO HÌNH LÀM DÀI TĨNH MẠCH THẬN TRONG GHÉP THẬN TỪ NGƯỜI HIẾN SỐNG TẠI BỆNH VIỆN HỮU NGHỊ VIỆT ĐỨC
Authors: Việt Khải Ninh , Tuấn Hoàng , Quang Nghĩa Nguyễn , Nguyên Vũ Lê , Ngọc Sơn Đỗ , Hà Phương Trần , Tuấn Anh Hoàng , Công Nguyên Dương , Bình Giang Trần
Published: April 2022

Mục tiêu: Mô tả đặc điểm kỹ thuật ghép thận từ người hiến sống sử dụng đoạn tĩnh mạch bảo quản và đánh giá kết quả sớm sau ghép của những bệnh nhân trên. Đối tượng và phương pháp nghiên cứu: Nghiên cứu mô tả tiến cứu 14 bệnh nhân ghép thận có tĩnh mạch thận phải ngắn có sử dụng đoạn tĩnh mạch bảo quản từ ngân hàng mô để tạo hình làm dài tĩnh mạch thận ghép tại bệnh viện Hữu nghị Việt Đức từ tháng 3/2019 đến 06/2020. Kết quả: 14 bệnh nhân trong nghiên cứu, có 11 bệnh nhân sử dụng tĩnh mạch chậu, 3 bệnh nhân sử dụng tĩnh mạch sinh dục. Thời gian bảo quản mạch trung vị là 66.5 (Inter quartile range – IQR: 86) ngày. Có 13/14  tĩnh mạch bảo quản đầy đủ các lớp áo, không viêm xơ. Chiều dài đoạn mạch được làm dài thêm là 21.6 ± 6.8 mm. Thời gian thiếu máu lạnh trung bình 66.6 ± 14.5 phút, thời gian tạo hình tĩnh mạch 13 ± 1.8 phút, thời gian thiếu máu ấm 32.6 ± 6.2 phút. Chức năng thận sau ghép về bình thường 100% các trường hợp, không có biến chứng mạch máu sau ghép giai đoạn hậu phẫu và cho tới thời điểm hiện tại. Thời gian nằm viện trung bình 15 ± 1.03 ngày. Thời gian theo dõi trung vị là 22.5 tháng. Kết luận: Sử dụng đoạn mạch bảo quản đồng loại trong tạo hình mạch thận ngắn trong ghép thận là kỹ thuật dễ thực hiện, an toàn và hiệu quả.
Somente nos Estados Unidos e na Inglaterra que falam inglês? Crenças interculturais no 6º ano do Ensino Fundamental II
Authors: Barbosa Laissy Taynã Da Silva , Nascimento Dandara Lorrayne Do
Published: April 2022

O objetivo deste artigo é tecer considerações e reflexões a respeito da proposta de interculturalidade da Base Nacional Comum Curricular (BNCC), a partir de crenças de alunos de língua inglesa no 6º ano do Ensino Fundamental II, em uma escola pública do sudeste do Pará. Para isso foi feito um estudo com 145 alunos do 6º ano do ensino fundamental no primeiro dia de aula de língua inglesa. A revisão da literatura deste estudo seguiu, primeiramente, a linha sobre o conceito de crenças, aprendizagem e ensino de línguas e as tendências mais recentes nessa área. Em seguida, discutiu-se o conceito de interculturalidade e os fatores pertinentes a esse conceito na BNCC para, assim fazer a triangulação entre a teoria e os dados obtidos. Assim, o resultado dessa pesquisa é uma proposta de intervenção por meio de sequência didática que possam gerir a discussão do inglês como língua franca. Crenças. Interculturalidade. BNCC.
Influence of the circumferential speed of the hammers and the diameter of the working chamber on the value of the effective power of the hammer crusher
Authors:   Voronezh state agrarian University, Yarovoy Mikhail , Kornev Andrey , Druzhinin Roman
Published: April 2022

The article presents the results of experimental studies to determine the effect of the speed of hammers and the diameter of the working chamber on the value of the effective power of the hammer crusher when grinding barley and feed grain mixture. The analysis of experimental data with an explanation of the obtained patterns is given. Keywords: HAMMER CRUSHERS, EFFECTIVE POWER, COMPOUND FEED, CIRCUMFERENTIAL SPEED, GRINDING MODULUS
YILDIRMA İLE SİNİZM ARASINDAKİ İLİŞKİDE TÜKENMİŞLİĞİN ARACILIK ETKİSİ: DOĞUBAYAZIT ÖRNEĞİ
Authors: AVCI Aslıhan , AYDOĞAN Enver
Published: April 2022

Amaç: Bu çalışmanın temel amacı; tükenmişliğin yıldırma ve sinizm arasındaki ilişkide aracılık rolünü incelemektir.
Yöntem: Doğubayazıt’ta çalışan 303 öğretmen üzerinde yapılan bu çalışmanın verileri çözümlenirken SPSS istatistik programı kullanılmış olup korelasyon analizi ve regresyon analizi yapılmıştır. Yıldırmayı ölçmek için Aiello, Deitinger, Nardella ve Bonafede (2008) tarafından geliştirilen yıldırma ölçeği; tükenmişliği ölçmek için Maslach (1981) tarafından geliştirilen tükenmişlik ölçeği ve sinizmi ölçmek için Brandes, Dharwadkar, Dean (1992) tarafından geliştirilmiş sinizm ölçeği kullanılmıştır. Yıldırma ve sinizm arasındaki ilişkide tükenmişliğin aracılık rolünü belirlemek amacıyla Baron ve Kenny'nin (1986) dört aşamadan oluşan Nedensel Adım Yaklaşımı kullanılmıştır.
Bulgular: Sobel testi aracılık modelinin anlamlı olduğunu göstermiştir. Çalışma sonucunda yıldırmanın tükenmişlik ve sinizm üzerinde doğrudan etkisi olduğu ve tükenmişliğin sinizmi doğrudan etkilediği tespit edilmiştir. Ayrıca; yıldırmanın sinizm üzerindeki etkisinde, tükenmişliğin ‘kısmi aracı’ değişken olduğu sonucuna ulaşılmıştır.
Özgünlük: Bu çalışmada yıldırma ve sinizm arasındaki ilişkide tükenmişliğin aracılık mekanizması yıldırma, sinizm ve tükenmişlik kavramları birlikte incelenerek belirlenmiştir. Bu bulgu, bir özgünlük sunmakta ve literatüre bir katkı sağlamaktadır.
TÜRKİYE LİMANLARINDAKİ KONTEYNER VE YÜK ELLEÇLEME HACİMLERİNİN YSA NARX MODELİ İLE ÖNGÖRÜLMESİ
Authors: KILINÇ Gamze , KARAATLI Meltem , ÖMÜRBEK Nuri
Published: April 2022

Amaç: Bu çalışmada mevcut donanımı daha etkili ve verimli kullanabilmek amacıyla Türkiye’deki limanlarda gerçekleşen konteyner ve yük elleçleme miktarlarının öngörüsü yapılmıştır. Konteyner ve yük hacimlerinin öngörüsü, konteyner ve yük akışındaki planlamanın yapılmasını sağlayacak ve böylece işletmelerin hizmet kalitesinin iyileştirilmesine destek olacaktır.
Yöntem: Bu çalışmada Türkiye’deki limanlarda gerçekleşen konteyner ve yük elleçleme miktarının Yapay Sinir Ağları (YSA) Doğrusal Olmayan Dışsal Girdili Otoregresif Ağ (NARX) Modeli ile öngörüsü gerçekleştirilmiştir. Çalışmada iki bağımlı değişken olan konteyner elleçleme ve yük elleçleme miktarı ile ilgili bir öngörüde bulunabilmek için Döviz Sepeti Kuru (USD-EURO), Gayri Safi Yurtiçi Hasıla (GSYH), Tüketici Güven Endeksi, Brent Petrol, İhracat, İthalat ve Sanayi Üretim Endeksi bağımsız değişkenleri kullanılmıştır. Veri seti Ocak 2004-Ekim 2020 dönemine ait aylık verilerden oluşmaktadır.
Bulgular: Konteyner ve yük elleçleme miktarlarının, Temmuz 2020-Aralık 2021 dönemi için 18 aylık öngörü değerleri hesaplanmıştır. Bu öngörü değerlerinden açıklanan ilk 4 ay ile tahmin ve gerçek değer karşılaştırılması yapılmıştır. Ayrıca MAPE, MAE, RMSE ve MAD performans ölçütleri hesaplanmıştır.
Özgünlük: Türkiye limanlarında gerçekleşen konteyner ve yük elleçleme miktarlarının öngörüsü için daha önce kullanılan tahmin tekniklerinden farklı olarak NARX sinir ağları modeli kullanılmıştır.
KAMU HASTANELERİNDE PERFORMANS DEĞERLENDİRMESİ: VERİ ZARFLAMA ANALİTİK HİYERARŞİ PROSESİ (VZAHP) VE PABON LASSO MODELİ (PLM) UYGULAMASI
Authors: ESEN Hatice , YİĞİT Vahit
Published: April 2022

Amaç: Bu araştırmanın amacı, Akdeniz Bölgesi’nde faaliyet gösteren kamu hastanelerinin göreceli teknik etkinlik düzeylerini belirlemektir.
Yöntem: Araştırmada, hastanelerin performanslarının belirlenmesinde Veri Zarflama Analizi (VZA), Analitik Hiyerarşi Prosesi (AHP) ve Pabon Lasso Modeli (PLM) kullanılmıştır. İlk olarak ağırlık kısıtlaması olmadan VZA, daha sonra AHP ile elde edilen ağırlıklı VZA modeli uygulanmıştır. En son aşamada yatak kullanım performasını belirlemede PLM kullanılmıştır.
Bulgular: VZA modeline göre hastanelerin %34’ü teknik düzeyde verimlidir. Girdi ve çıktıların ağırlıkları dikkate alınarak yapılan VZA’ya göre hastanelerin %12,8’inin teknik düzeyde verimli olduğu tespit edilmiştir. PLM’ye göre hastanelerin %31,9’unun en verimli bölgede (3. Bölge) yer aldığı saptanmıştır.
Özgünlük: Bu araştırmada hastane verimliliklerini belirlemede hibrit yöntem olan Veri Zarflama Analitik Hiyarşi Prosesi (VZAHP) ve PLM yöntemleri birlikte ele alınmıştır. Hibrit yöntemlerin birlikte kullanılarak hastanelerin performansına yönelik kanıta dayalı bilgiler sunulması, yapılan çalışmanın özgünlüğü ortaya koymakta ve literatürdeki eksikliği dolduracağı öngörülmektedir.
AR-GE PROJELERİNDEKİ KRİTİK BAŞARI FAKTÖRLERİNİN ALGILANAN PROJE PERFORMANSI ÜZERİNDEKİ ETKİLERİ: HAVACILIK SEKTÖRÜNDE BİR ARAŞTIRMA
Authors: SOYAL Barış , SOYSAL Mehmet , ÖMÜRGÖNÜLŞEN Mine
Published: April 2022

Amaç: Bu çalışmanın amacı, Türk savunma ve havacılık sanayisindeki projelerde çalışan tasarım mühendislerinin algıladıkları kritik başarı faktörleri ile algılanan proje performansı arasındaki ilişkiyi incelemektir.Yöntem: Çalışmanın veri toplama aşamasında, 211 tasarım mühendisi ile yüz yüze görüşülerek anket uygulanmıştır.Bulgular: Korelasyon analizinde algılanan kritik başarı faktörleri ve algılanan proje performansı arasında pozitif yönlü bir ilişki bulunmuştur. Regresyon analizinde sorun giderme, proje misyonu, müşteri kabulü ve teknik görevler faktörleri ile algılanan proje performansı arasında anlamlı ilişki bulunmuştur.
Özgünlük: Çalışmanın literatürdeki farkı Türk savunma ve havacılık sanayisinde Ar-Ge projelerindeki algılanan kritik başarı faktörleri ve algılanan proje performansı arasındaki ilişkiyi inceleyen, bilinebildiği kadarı ile ilk çalışma olmasıdır.
WEB OF SCIENCE SÜZGECİNDEN YALIN ÜRETİM ARAŞTIRMA PORTFÖYÜ: NEREDEN BAŞLAMALIYIZ?
Authors: ÖZDAĞOĞLU Güzin , ÖZDAĞOĞLU Aşkın , DAMAR Muhammet
Published: April 2022

Amaç: Bu çalışmanın amacı, yalın üretim konusunda uluslararası literatürde oluşan yayın portföyünün analitik araçlar eşliğinde nasıl incelenebileceğini açıklamak ve bulguları belirli boyutlar üzerinden tartışmaktır.
Yöntem: Veri kaynağı olarak Web of Science veri tabanları ve bu veri tabanlarının sağladığı metin türünde veriler kullanılmıştır. Veri seti, 17 Haziran 2021 tarihine kadar yayınlanmış toplam 1941 araştırma makalesinden oluşmaktadır. Bilimetri ve bibliyometri yaklaşımlarıyla, yayınlar, alanlar, atıflar ve dergiler arasındaki örüntülerin ve eğilimlerin çıkarımında tablolar ile birlikte metin ve ağ analitiğinde kümelemeden yararlanılmıştır.
Bulgular: Bu geniş portföy içerisinde, araştırmacılar hangi yayınlara öncelik verebileceğini görebilmektedir. Toplam yayın ve atıf sayısına bakıldığında ABD üniversiteleri, bireysel değerlendirmelere göre Brezilya ve Hindistan öne çıkmaktadır. Konular ve dergiler üretim ve yöneylem alanlarında kümelenmiş olsa da sağlık, malzeme bilimi ve çevre bilimi gibi alanlarda da artan bir eğilim göstermektedir. Türkiye adresli çalışmaların oluşturduğu portföy, 13. sırada yer almaktadır.
Özgünlük: Çalışma, yalın üretim konusundaki araştırmalar üzerinden, dergiler ve referanslar gibi bibliyometrik boyutlar arasındaki ilişkileri ve bunların zaman boyunca değişimini analitik bir yaklaşımla inceleyerek, mevcut literatürün büyük resmini çizmektedir. Bu yaklaşım, aynı zamanda, öncül literatür araştırma sürecini yalınlaştırma özelliği de taşımaktadır.
DETERMINATION OF THE FLOODING ZONE DURING A DAM BREAKS USING THE VOF METHOD BY NUMERICAL SIMULATION
Authors:   Al-Farabi Kazakh National University, Almaty, Kazakhstan, ssakhov A.A. , Rakhymzhanova Zh.B. ,   Al-Farabi Kazakh National University, Almaty, Kazakhstan
Published: April 2022

In this paper, we investigated the problem of dam breakage. The authors studied this problem using numerical modeling based on the Navier-Stokes equations with a turbulent k-epsilon RNG model and used the Volume of Fluid (VOF) method and the PISO algorithm. To verify the numerical model, the authors used the test problem of dam break in a 450 channel. The simulation results were compared with experimental data and with numerical data of another author. Having convinced of the correctness of the mathematical model, the authors carried out a numerical simulation of the main problem in three versions: without barriers, with one obstacle, with two obstacles. As the obstructions restrained the flow, a decrease in the water level and a slower time for the appearance of water could be observed. The main goal of this work is to analyze the flow in a channel with complex turn reliefs.
PREDICTION OF OIL PRODUCTION USING PHYSICS-INFORMED NEURAL NETWORKS
Authors:   al-Farabi Kazakh National University, Almaty, Kenzhebek Y. , Imankulov T.S. ,   al-Farabi Kazakh National University, Almaty, Akhmed-Zaki D.Zh. ,   Astana IT University, Nur-Sultan
Published: April 2022

In recent years, modern information technologies have been actively used in various industries. The oil industry is no exception, since high-performance computing technologies, artificial intelligence algorithms, methods of collecting, processing and storing information are actively used to solve the problems of increasing oil recovery. Deep learning has made remarkable strides in a variety of applications, but its use for solving partial differential equations has only recently emerged. In particular, you can replace traditional numerical methods with a neural network that approximates the solution to a partial differential equation. Physically Informed Neural Networks (PINNs) embed partial differential equations into the neural network loss function using automatic differentiation. A numerical algorithm and PINN have been developed for solving the one-dimensional pressure equation from the Buckley-Leverett mathematical model. The results of numerical solution and prediction of the PINN neural network for solving the pressure equation are obtained.
THERMOPHYSICAL CHARACTERISTICS OF THE HEAT AND MASS TRANSFER EQUATION IN SOIL
Authors:   International IT University, Almaty, Kazakhstan, Rysbaiuly B. , Karashbayeva Zh.O. ,   Astana IT University, Nur-Sultan, Kazakhstan,   L.N. Gumilyov Eurasian National University, Nur-Sultan, Kazakhstan
Published: April 2022

The paper presents the coefficient inverse problem of heat and mass transfer. It is known that the process of moisture and heat transfer in soil is described by a system of partial differential equations. The inverse coefficient problem is solved for finding the thermophysical characteristics of the heat and mass transfer equations. The initial-boundary conditions for the heat and mass transfer system are set. To solve the problem, the measured values of temperature and moisture are additionally set at the accessible boundary of the considered area. To solve the inverse problem, the Dufort- Frankel scheme and Matlab Optimization Toolbox are used. The Jacobian is used to reduce the number of iterations. The results of numerical calculations with and without Jacobian are presented.
CONSTRUCTION OF AN OPTIMAL COLLECTIVE DECISION ON THE BASIS OF A CLUSTER ENSEMBLE
Authors:   Al-Farabi Kazakh National University, Amirgaliyev Ye. ,   Institute of Information and Computational Technologies CS MES RK, Almaty, Kazakhstan, Berikov V. ,   Novosibirsk State University; Sobolev Institute of Mathematics, Novosibirsk, Russia, Cherikbayeva L. ,   Al-Farabi Kazakh National University; Institute of Information and Computational Technologies CS MES RK, Almaty, Kazakhstan, Tulegenova B. ,   Institute of Information and Computational Technologies CS MES RK; Satbayev University, Almaty, Kazakhstan, Daiyrbayeva E. ,   Institute of Information and Computational Technologies CS MES RK; Academy of Logistics and Transport, Almaty, Kazakhstan
Published: April 2022

This article presents methods of image analysis based on supervised learning and an algorithm consisting of two stages of determining the optimal classifier using a cluster ensemble. At the first stage, the averaged co-association matrix is calculated using a cluster ensemble. In the clustering ensemble, we used a scheme of a single clustering algorithm that constructs base partitions with parameters taken at random. At the second stage, the optimal classifier is determined using the resulting kernel matrix as input data. Numerical experiments were carried out with real hyperspectral images. The experimental results showed that the proposed algorithm has classification accuracy comparable to some modern methods.
MODELS FOR FORMING KNOWLEDGE DATABASES FOR DECISION SUPPORT SYSTEMS FOR RECOGNIZING CYBERATTACKS
Authors:   National University of Life and Environmental Sciences, Kiev, Ukraine, Lakhno V.A. , Akhmetov B.S. ,   Abai Kazakh National Pedagogical University, Almaty, Kazakhsta, Ydyryshbayeva M.B. ,   Al Farabi Kazakh National University, Almaty, Kazakhstan, Yerbol A. ,   Abai Kazakh National Pedagogical University, Almaty, Kazakhsta
Published: April 2022

Patterns of Bayesian networks (BN) have been developed for the computing core of the decision support system (DSS) in the course of threats prediction and stages of intrusion into information and communication networks (ICN) of informatization objects. The proposed Bayesian networks (BN) templates allow one to operate with a variety of random variables and determine the probability of a cyber threat or a specific stage of an invasion under given conditions. Probabilistic models for detecting network intrusions based on the use of dynamic Bayesian networks (DBN) have been added. The training of Bayesian networks parameters based on the EM-algorithm was carried out. In contrast to existing solutions, the proposed approach makes it possible not only to take into account the main stages of intrusions but also to make more reasonable decisions based on the use of both typical intrusion patterns and newly synthesized patterns. All templates and models make up the decision support system (DSS) computing core for intrusion detection. The effectiveness of the developed models was tested on test samples that were not previously used in training.
THE TASKS OF SCALING CLOUD APPLICATIONS FOR THE EDUCATIONAL ENVIRONMENT OF UNIVERSITIES
Authors:   National University of Bioresources and Nature Management, Kiev, Ukraine, Lakhno V.A. , Kydyralina L.M. ,   "ShakarimUniversity in Semey", Semey, Kazakhstan, Bereke M. ,   Abai Kazakh national pedagogical university, Almaty, Kazakhstan
Published: April 2022

It is shown that modern cloud technologies in education provide resources to students and teachers as online services. When using a cloud environment, the information will be stored in the cloud. In addition, you do not need to specifically install additional software on your personal computer. In this case, cloud technologies act as a highly effective tool that improves the quality of education and promotes greater mobility of students. It is proved that, speaking about the technical aspects and prospects for the development of cloud applications in the educational process of universities, it is necessary to pay attention to the critical characteristics of cloud solutions in terms of speed and security of information exchange. An algorithm for scaling cloud applications for the digital educational environment of the university, as well as for determining the execution time of a network request, is described. Based on information about the state of the digital educational environment, sets of rules for reactive scaling and evaluating the effectiveness of the university's digital educational environment are formed.
METHOD OF COLLECTING TEXTS FROM RELIGIOUS PAGES ON TWITTER SOCIAL NETWORK
Authors:   Al-Farabi Kazakh National University, Almaty, Kazakhstan, Mussiraliyeva Sh.Zh. , Ospanov R.K. ,   Al-Farabi Kazakh National University, Almaty, Kazakhstan, Shalabaev K.M. ,   Al-Farabi Kazakh National University, Almaty, Kazakhstan, Sattar B.A. ,   Al-Farabi Kazakh National University, Almaty, Kazakhstan
Published: April 2022

Currently, social networks are a platform for a large amount of information. With the exception of useful information, social networks have become a convenient platform for illegal actions. Suspicious activity often remains in the shadows due to the lack of threat detection and analysis systems in social networks. The article provides a brief overview of approaches for analyzing information from a user profile.
RESEARCH AND DEVELOPMENT OF A QUESTION AND ANSWER SYSTEM BASED ON THE BERT MODEL FOR THE KAZAKH LANGUAGE
Authors:   Al-Farabi Kazakh National University, Institute of Information and Computational Technologies, Almaty, Kazakhstan, Rakhimova D. , Kassymova D. ,   Academy of Logistics and Transport, Institute of Information and Computational Technologies, Almaty, Kazakhstan, Isabaeva D. ,   Abai Kazakh NationalPedagogicalUniversity, Almaty, Kazakhstan
Published: April 2022

This article presents the research and development of a question-and-answer system based on the BERT model for the Kazakh language. The article presents a new combination of normative and statistical approaches to the analysis of questions used in the system of answering questions of a closed subject area for agglutinative languages ​​such as Kazakh. Question analysis consists of focusing and classifying questions. To focus, we have several experts based on the rules of the Kazakh language FAQ. BERT is undoubtedly a useful model in using machine learning for natural language processing. It provides fast and accurate set-up and can be used in many practical and subsequent applications.
THE CONCEPT AND SKILLS OF COMPUTATIONAL THINKING IN DIGITAL EDUCATION
Authors:   Abai Kazakh national pedagogical university, Almaty, Kazakhstan, Kamalova G. , Akzholova А. ,   Abai Kazakh National Pedagogical University, Almaty, Kazakhstan
Published: April 2022

Nowadays, the role of digital technologies in human life and in the field of education is increasing. The concept of computational thinking is becoming a key concept in the digital age. The use of such thinking in the educational process allows students to solve problems and tasks, creatively and systematically perceive various information. The article deals with the concept of "computational thinking", elements of computational thinking (abstraction, decomposition, generalization, algorithms), approaches to evaluating computational thinking. The article is based mainly on the review and analysis of foreign scientific and pedagogical works, since the practical definition of the concept of computational thinking and its components is not widely reflected in the works of Kazakhstani researchers.
EXPERIMENTAL RESEARCH OF THE EFFECTIVENESS OF PROJECT- RESEARCH TRAINING IN COMPUTATIONAL INFORMATICS FOR FUTURE COMPUTER SCIENCE TEACHERS
Authors:   Abai Kazakh national pedagogical university, Kazakhstan, Almaty, Kamalova G.B. , Revshenova M.I. ,   Abai Kazakh National Pedagogical University, Almaty, Kazakhstan
Published: April 2022

The article is the result of an experimental study on teaching computational informatics to future teachers of informatics in a pedagogical university. The experiment was carried out on the basis of the Institute of Mathematics, Physics and Informatics of the Kazakh National Pedagogical University named after Abai. The methodology and methods for organizing and conducting experimental work in the field of computational informatics are described. The analysis of the results of the experimental work is presented graphically in the form of tables and diagrams. The reliability of the obtained results was checked in MS Excel. The difference between the results of the experimental group and the results obtained in the control group is significant and statistically significant. Pearson's χ2 was used to assess the significance of differences. As a result of the experimental work, the effectiveness of the developed methodology for teaching computational informatics to future teachers of informatics is tested in the context of a competency-based approach.
THE IMPORTANCE OF CYBER PROFESSIONALISM OF A TEACHER IN THE DIGITAL TRANSFORMATION OF CAREER GUIDANCE WORK
Authors:   Al-Farabi Kazakh National University, Almaty, Kazakhstan, Nazkenova B.B.
Published: April 2022

The article considers the importance of a teacher's cyber-professional competence in the context of the digital transformation of career guidance. To identify the relevance of the article, a multivariate analysis of the functioning of the existing career guidance system in general secondary education was carried out. According to the survey results, traditional career guidance tools for high school students are much more popular than digital ones. This situation does not meet the modern needs of high school students in the field of career guidance and shows that teachers and psychologists are not ready to demonstrate it with the help of digital tools. Therefore, the article concludes that a cybercompetent teacher in a digital education environment should be able to meet the needs of students in the field of professionally oriented support for professional self-determination in the field of IT, STEM, STEAM and STREAM professions
DESIGNING A TRANSITION SYSTEM TO PERSONALIZED LEARINING: ANALYSIS OF THE RESULTS OF THE STAKEHOLDER SURVEY
Authors:   East Kazakhstan Technical University, Ust-Kamenogorsk, Kazakhstan, Seitakhmetova Zh. , Kumargazhanova S. ,   East Kazakhstan Technical University, Ust-Kamenogorsk, Kazakhstan, Bobrov L. ,   Novosibirsk State University of Economics and Management, Novosibirsk, Russia
Published: April 2022

The issue of the transition of schools in Kazakhstan to a personalized format of education using information technology in the context of a global pandemic is relevant and requires careful study. This study aims to identify the factors that contribute to the effective implementation of personalized learning in specialized schools for gifted students. As a method, we chose a real-time survey of stakeholders within the framework of a logical-structured approach. Data processing was carried out using the MS Forms software application. The surveys were aimed at obtaining the views of students, parents and teachers to confirm the real problems of introducing personalized learning in schools. The results of the study made it possible to identify the main five factors contributing to the implementation of software in the educational process of schools and can be taken into account in the process of developing a design system for the transition to personalized learning.
METHODOLOGICAL PREPARATION OF FUTURE TEACHERS OF COMPUTER SCIENCE FOR EXTRA-EDUCATIONAL ACTIVITIES
Authors:   Abai Kazakh national pedagogical university, Almaty, Kazakhstan, Salgozha I.T.
Published: April 2022

The article deals with the formation of cognitive interest in the subject of informatics, as well as the skills of independent work on the acquisition of new knowledge, the development of thinking, memory, attention. A modern Informatics teacher is called upon not only to educate and educate schoolchildren, to develop students' interest in the subject, which has a great effect in the formation of knowledge and contributes to the activation of the process of knowledge perception and mental activity, but must also be able to organize extracurricular activities. The relevance of this topic meets the new requirements of education in the field of Informatics. The article describes the experience of carrying out extracurricular work in the study of teaching methods of Informatics. Therefore, targeted methodological training of future teachers of informatics for extracurricular work on the subject significantly increases their overall methodological training.
APPLICATION OF COLLECTIVE LEARNING TECHNOLOGY BASED ON THE DESKTOP AS A SERVICE CLOUD COMPUTING MODEL
Authors:   Korkyt Ata Kyzylorda University, Kyzylorda, Kazakhsta, Tileubai S.Sh. , Doszhanov B.А. ,   Korkyt Ata Kyzylorda University, Kyzylorda, Kazakhsta, Sabitbek A.S. ,   Korkyt Ata Kyzylorda University, Kyzylorda, Kazakhsta
Published: April 2022

Currently, one of the main trends in the development of education today is the introduction of new information and cloud technologies in the educational process. Cloud technologies as an auxiliary technical tool for the organization of education allow to ensure a high level of access to education, improve the quality of education. Cloud technologies in education are based on the formation of learning collaboration between students through the remote organization of collective learning technologies, and for this purpose, the Desktop as a service cloud computing model optimizes the educational process by providing teachers and students with fully managed virtual desktops. The article highlights the importance of collective learning technologies, provides Desktop as a service solution for collective interaction with cloud systems, and studies the experience of foreign universities in applying the Desktop as a service cloud computing model.
FORMATION OF THE CONCEPT OF INFORMATION AMONG STUDENTS IN THE STUDY OF COMPUTER SCIENCE IN SECONDARY SCHOOL
Authors:   Gumilyov Eurasian National University, Nur-Sultan, Kazakhstan, Turdina A.B. , Kerimbayev A. O. ,   Kazakh Agrotechnical University named after S. Seifullin, Nur-Sultan, Kazakhstan; e-mail: aibek.kerimbayev@kazatu.kz, Mukushev A.B. ,   Kazakh Agrotechnical University named after S. Seifullin, Nur-Sultan, Kazakhstan, Adilbekova B.A. ,   Higher College of Transport and Communications, Nur-Sultan, Kazakhstan
Published: April 2022

Information theory refers to the teaching of an interdisciplinary orientation. To date, the scientific and practical results of information theory have found wide application in computer science, mathematics, physics, linguistics and other fundamental sciences. The article describes the theoretical, practical and pedagogical aspects of the concept of information. It is established that information is a fundamental concept and its place in social and natural processes is determined. The role of the subject of computer science in the study of fundamental problems of the concept of information in the educational process of secondary and higher schools is considered. The essence and application of the Hartley and Shannon formulas are revealed. These equations are the basic equations of information theory. Based on the theory of probability, the concept of information uncertainty is given and the unit of its measurement is presented. Various scientific directions of information theory are investigated: the measurement of information values and the use of the Shannon equation in the testing process.
Effects of OH radical and SO2 concentrations on photochemical reactions of mixed anthropogenic organic gases
Authors: Li Junling , Li Kun , Zhang Hao , Zhang Xin , Ji Yuanyuan , Chu Wanghui , Kong Yuxue , Chu Yangxi , Ren Yanqin , Zhang Yujie , Zhang Haijie , Gao Rui , Wu Zhenhai , Bi Fang , Chen Xuan , Wang Xuezhong , Wang Weigang , Li Hong , Ge Maofa
Published: April 2022

Abstract. Vehicle exhaust, as a major source of air pollutants in urban areas, contains a complex mixture of organic vapors including long-chain alkanes and aromatic hydrocarbons. The atmospheric oxidation of vehicle emissions is a highly complex system as the co-existing inorganic gases (e.g., NOx and SO2) from other urban sources, and therefore remains poorly understood. In this work, the photooxidation of n-dodecane, 1,3,5-trimethylbeneze, and their mixture are studied in the presence of NOx and SO2 to mimic the atmospheric oxidation of urban vehicle emissions (including diesel and gasoline vehicles), and the formation of ozone and secondary aerosols are investigated. It is found that ozone formation is enhanced by higher OH concentration and higher temperature, but is influenced little by SO2 concentration. However, SO2 can largely enhance the particle formation in both number and mass concentrations, likely due to the promoted new particle formation and acid-catalyzed heterogeneous reactions from the formation of sulfuric acid. In addition, organo-sulfates and organo-nitrates are detected in the formed particles, and the presence of SO2 can promote the formation of organo-sulfates. These results provide a scientific basis for systematically evaluating the effects of SO2, OH concentration, and temperature on the oxidation of mixed organic gases in the atmosphere that produce ozone and secondary particles.
Emissions of Organic Compounds from Western US Wildfires and Their Near Fire Transformations
Authors: Liang Yutong , Stamatis Christos , Fortner Edward C. , Wernis Rebecca A. , Van Rooy Paul , Majluf Francesca , Yacovitch Tara I. , Daube Conner , Herndon Scott C. , Kreisberg Nathan M. , Barsanti Kelley C. , Goldstein Allen H.
Published: April 2022

Abstract. The size and frequency of wildfires in the western United States have been increasing and this trend is projected to continue, with increasing adverse consequences for human health. Gas- and particle-phase organic compounds are the main component of wildfire emissions. Some of the directly emitted compounds are hazardous air pollutants, while others can react with oxidants to form secondary air pollutants such as ozone and secondary organic aerosol (SOA). Further, compounds emitted in the particle phase can volatize during smoke transport and can then serve as precursors for SOA. The extent of pollutant formation from wildfire emissions is dependent in part on the speciation of organic compounds. The most detailed speciation of organic compounds has been achieved in laboratory studies, though recent field campaigns are leading to an increase in such measurements in the field. In this study, we identified and quantified hundreds of gas- and particle-phase organic compounds emitted from conifer-dominated wildfires in the western US, using two two-dimensional gas chromatography coupled with time-of-flight mass spectrometry (GC×GC ToFMS) instruments. Observed emission factors (EFs) and emission ratios are reported for four wildfires. As has been demonstrated previously, modified combustion efficiency (MCE) was a good predictor of particle phase EFs, except for elemental carbon. Higher emissions of diterpenoids, resin acids and monoterpenes were observed in the field relative to laboratory studies; likely due to distillation from unburned heated vegetation, which may be underrepresented in laboratory studies. These diterpenoids and resin acids accounted for up to 45 % of total quantified organic aerosol, higher than the contribution from sugar and sugar derivatives. The low volatility of resin acids makes them ideal markers for conifer fire smoke. The speciated measurements also show that evaporation of semi-volatile organic compounds took place in smoke plumes, which suggests that the evaporated primary organic aerosol can be precursors of SOAs in wildfire smoke plumes.
Modelling submerged biofouled microplastics and their vertical trajectories
Authors: Fischer Reint , Lobelle Delphine , Kooi Merel , Koelmans Albert , Onink Victor , Laufkötter Charlotte , Amaral-Zettler Linda , Yool Andrew , van Sebille Erik
Published: April 2022

Abstract. The fate of (micro)plastic particles in the open ocean is controlled by biological and physical processes. Here, we model the effects of biofouling on the subsurface vertical distribution of spherical, virtual plastic particles with radii of 0.01–1 mm. The biological specifications include the attachment, growth and loss of algae on particles. The physical specifications include four vertical velocity terms: advection, wind-driven mixing, tidally induced mixing and the sinking velocity of the biofouled particle. We track 10 000 particles for 1 year in three different regions with distinct biological and physical properties: the low-productivity region of the North Pacific Subtropical Gyre, the high-productivity region of the equatorial Pacific and the high mixing region of the Southern Ocean. The growth of biofilm mass in the euphotic zone and loss of mass below the euphotic zone result in the oscillatory behaviour of particles, where the larger (0.1–1.0 mm) particles have much shorter average oscillation lengths (<10 d; 90th percentile) than the smaller (0.01–0.1 mm) particles (up to 130 d; 90th percentile). A subsurface maximum particle concentration occurs just below the mixed-layer depth (around 30 m) in the equatorial Pacific, which is most pronounced for larger particles (0.1–1.0 mm). This occurs because particles become neutrally buoyant when the processes affecting the settling velocity of a particle and the seawater's vertical movement are in equilibrium. Seasonal effects in the subtropical gyre result in particles sinking below the mixed-layer depth only during spring blooms but otherwise remaining within the mixed layer. The strong winds and deepest average mixed-layer depth in the Southern Ocean (400 m) result in the deepest redistribution of particles (>5000 m). Our results show that the vertical movement of particles is mainly affected by physical (wind-induced mixing) processes within the mixed-layer and biological (biofilm) dynamics below the mixed layer. Furthermore, positively buoyant particles with radii of 0.01–1.0 mm can sink far below the euphotic zone and mixed layer in regions with high near-surface mixing or high biological activity. This work can easily be coupled to other models to simulate open-ocean biofouling dynamics, in order to reach a better understanding of where ocean (micro)plastic ends up.
Deep through-flow in the Bight Fracture Zone and its imprint in the Irminger Sea
Authors: Petit Tillys , Thierry Virginie , Mercier Herlé
Published: April 2022

Abstract. Iceland-Scotland Overflow Water (ISOW) is exported from the Nordic Seas into the Iceland Basin to feed the lower limb of the Meridional Overturning Circulation. The Bight Fracture Zone (BFZ) is known to be a major route for ISOW toward the Irminger Sea, but the role of this gateway in the evolution of ISOW properties over the subpolar gyre is unclear. A combination of ship-based and Deep-Argo data gathered between 2015 and 2018 allows us to investigate the pathways and hydrological evolution of ISOW as it flows through the BFZ, as well as its influence on the ISOW properties in the Irminger Sea. The ISOW flow through the BFZ amounts to 0.76 ± 0.2 Sv and is mainly fed by the lighter part of the ISOW layer flowing west of 29–30° W as part of the East Reykjanes Ridge Current in the Iceland Basin. In the rift valley of the BFZ, between an eastern and a western sill, the bathymetry of the BFZ shapes a cyclonic circulation along which the ISOW layer is homogenised. The largest changes in ISOW properties are however observed downstream of the western sill, at the exit of the BFZ. There, ISOW is mixed isopycnally with comparatively fresher ISOW from the Irminger Sea and lies over denser ISOW that entered the Irminger Sea south of the BFZ. These fresher ISOW result from the erosion of the ISOW core by mixing with inflows from the interior of the Irminger Sea as ISOW flows northward from the Charlie-Gibbs Fracture Zone. Hence, our analysis reveals the key role of the BFZ through-flow in compensating these inputs of fresh inflows along the northward Irminger Current.
Improving continuous-flow analysis of triple oxygen isotopes in ice cores: insights from replicate measurements
Authors: Davidge Lindsey , Steig Eric J. , Schauer Andrew J.
Published: April 2022

Abstract. Stable water isotope measurements from polar ice cores provide high-resolution information about past hydrologic conditions and are therefore important to understanding Earth's climate system. Routine high-resolution measurements of δ18O, δD, and deuterium excess are made by continuous-flow analysis (CFA) methods that include laser spectroscopy instruments. Recent advances in instrumentation allow for simultaneous measurements of all stable water isotopes, including δ17O and 17O excess (Δ17O). Here, we present replicate measurements of an ice core sample taken from Summit, Greenland, using a CFA system coupled to a cavity ring-down laser spectroscopy (CRDS) instrument. We demonstrate that our CFA-CRDS method can make high-precision measurements of Δ17O (< 5 per meg) with high resolution (a few cm) in ice core samples. We find that calibration errors generate most of the variability among the replicate datasets. Our work shows that CFA-CRDS methods can detect seasonal variability in Δ17O. We suggest that CFA-CRDS methods should be applied to ice core measurements when high-resolution information is desired.
Assessment of JSBACHv4.30 as land component of ICON-ESM-V1 in comparison to its predecessor JSBACHv3.2 of MPI-ESM1.2
Authors: Schneck Rainer , Gayler Veronika , Nabel Julia E. M. S. , Raddatz Thomas , Reick Christian H. , Schnur Reiner
Published: April 2022

Abstract. We assess the land surface model JSBACHv4, which was recently developed at the Max Planck Institute for Meteteorology as part of the effort to build the new Earth System model ICON-ESM. We assess JSBACHv4 in simulations coupled with ICON-A, the atmosphere model of ICON-ESM, hosting JSBACHv4 as land component to provide the surface bounddary conditions. The assessment is based on a comparison of simulated albedo, Land Surface Temperature (LST), Leaf Area Index (LAI), Terrestrial Water Storage (TWS), Fraction of Absorbed Photosynthetic Active Radiation (FAPAR), Net Primary Production (NPP), and Water-Use-Efficiency (WUE) with corresponding observational data. JSBACHv4 is the successor of JSBACHv3, therefore, another purpose of this study is to document how this step in model development has changed model biases. This is achieved by also assessing in parallel results of coupled land-atmosphere simulations with the preceding model ECHAM6 hosting JSBACHv3. Large albedo biases appear in both models over ice sheets and in central Asia. The temperate to boreal warm bias observed in simulations with JSBACHv3 largely remained in JSBACHv4, despite the very good agreement with observed LST in the global mean. For the assessment of changes in land water storage, a novel procedure is suggested to compare the gravitational data from the GRACE satellites to simulated TWS. It turns out that the agreement of changes in the seasonal cycle of TWS is sensitive to the representation of precipitation in the atmosphere model. The LAI is generally too high which is partly caused by too high soil moisture but also by the parameterization of the phenology itself. The pattern of WUE is for both models largely as observed. In India WUE is too high probably because JSBACH does not incorporate irrigation in our simulations. WUE differences between the two models can be traced back to differences in precipitation patterns in the two coupled land-atmosphere simulations. For both models, most NPP biases can be associated with biases in water stress, LAI and FAPAR. Particularly the NPP bias of the Eurasian steppes has switched from positive in JSBACHv3 to negative in JSBACHv4. This difference is mainly caused by weaker precipitation and FAPAR of ICON-A+JSBACHv4 in July, which is most probably caused by a feedback loop between too little soil moisture, evaporation and clouds. While the size and patterns of biases in albedo and LST are largely similar between the two model versions, they are less well correlated for precipitation and vegetation related variables like FAPAR. Overall, we see very good perspectives for further improving JSBACHv4, because there are sound possibilities to mitigate most of the biases without interdependencies or technical problems.