bluuebunny/crossref_metadata_2025_split huggingface dataset:
Serum biochemical parameters in pregnant women with and without fetal chromosomal abnornalities
Authors: Volkov A. N. , Rytenkova O. I. , Tsurkan E. V. , Babarykina T. A. , Surzhikova G. S. 
Published: January 2023

Aim. To analyse the levels of serum beta-human chorionic gonadotropin (β-hCG) and pregnancy-associated plasma protein A (PAPP-A) in pregnant women without fetal chromosomal abnormalities and with fetal trisomy 21 (Down syndrome) or 18 (Edwards syndrome).Materials and Methods. We performed a retrospective analysis of serum biochemical parameters of 1214 women who had previously undergone karyotyping as a part of prenatal or postnatal screening. Patients were stratified into those with a normal fetal karyotype, those carrying a fetus with trisomy 21, and those carrying a fetus with trisomy 18. Levels of serum β-hCG and PAPP-A were estimated using the AutoDELFIA automatic immunoassay system.Results. In most of the women carrying a fetus with trisomy 21, serum β-hCG has been increased as compared to the reference range. In contrast, women carrying a fetus with trisomy 18 generally had reduced serum β-hCG. In both cases, the level of serum PAPP-A has been decreased in comparison with a reference range. The proportion of women with a 2-fold reduced serum PAPP-A was 52.4% and 88.6% if carrying fetuses with trisomy 21 and trisomy 18, respectively.Conclusion. Serum b -hCG has been increased as compared to the reference range. In contrast, women carrying a fetus with trisomy 18 generally had reduced serum β-hCG. In both cases, the level of serum PAPP-A has been decreased in comparison with a reference range. The proportion of women with a 2-fold reduced serum PAPP-A was 52.4% and 88.6% if carrying fetuses with trisomy 21 and trisomy 18, respectively.Conclusion. Serum b-hCG and PAPP-A are sensitive markers of fetal trisomy 21 and trisomy 18 in pregnant women.
Modifikasi Variasi Latihan Smash: Studi Pengembangan Latihan Permainan Bola Voli
Authors: Kumbara Hengki , Pratama Pandu , Riyoko Endie , Suganda Mikkey Anggara , Suryadi Didi 
Published: January 2023

Pendahuluan. Penyediaan latihan smash dalam bola voli merupakan langkah awal untuk ruang latihan yang menarik dalam permainan. Akan tetapi, pengembangan model latihan smash pada ekstrakurikuler bola voli berlandaskan latihan yang menyenangkan masih belum mengalami perubahan. Penelitian ini bertujuan untuk menciptakan model variasi latihan smash permainan bola voli pada siswa ekstrakurikuler yang disesuaikan dengan kebutuhan latihan dan pertandingan siswa.
Metode. Penelitian ini menggunakan pendekatan (R&D) dengan menggunakan model ADDIE terdiri dari lima langkah yaitu Analysis, Design, Development, Implementation dan Evaluation. Dalam penelitian ini responden uji coba lapangan menggunakan 20 orang siswa ekstrakurikuler bola voli di SMA Negeri 3 Banyuasin III. Pengumpulan data menggunakan lembar wawancara, skala nilai dan lembar keefekivan model, selanjutnya analisis menggunakan deskriptif persentase dibantu menggunakan software microdoft excel 2019.
Hasil. Hasil penelitian menunjukan model latihan variasi memiliki rata-rata 75,44% dengan kriteria valid digunakan, dan tingkat efektivitas penggunaan produk sebesar 86,11% yang bearti kriteria efektif untuk digunakan.
Kesimpulan. Hasil penelitian ini membuktikan bahwa model latihan variasi smash dapat diterapkan dalam latihan keterampilan smash pada ekstrakurikuler bola voli, dengan merancang model variasi latihan smash dalam bentuk media audio visual yang dapat diakses di aplikasi youtube
Substantiation of the Radius of Curvature of the Chisel Plow Point of the Working Bodies of Tillage Implements
Authors: Čėsna Jonas , Golub Genadii , Kukharets Savelii , Hutsol Taras , Medvedskyi Oleksandr , Slobodian Sergii , Vadym Hulevskyi , Malaga-Tobola Urszula , Stroianovska Liliia 
Published: January 2023

Abstract
Chisel plows with a chisel as a working body, loosen the soil without mixing the layers. The analysis of the conducted research concludes that the most widespread is a cylindrical surface of a chisel working body - a chisel with a constant radius of curvature. It is theoretically established that at the radius of curvature of the bit up to 0.1 m, the soil on the surface of the bit will move chaotically, while the curvature of the bit does not affect the percentage of wrapped plant debris. As the radius of curvature increases, the force of inertia decreases, therefore, the angle of soil rise decreases. For the radius of curvature of the bit bigger than 0.5 m, the force of inertia has almost no effect on the angle of the soil rise. Without the influence of the force of inertia, the soil particles begin to move more orderly, the soil and plant debris begin to move along trajectories corresponding to the shape of the bit, which increases the coefficient of wrapping plant debris. It is established that at the radius of curvature of the bit 0.5 m and at an operating speed of 2 m·s−1 there is an orderly movement of soil on the surface of the bit, which affects the percentage of wrapping of plant remains. The use of a chisel plow point with a cylindrical surface increases the wrapping of plant remains by an average of 17%.
Application Use of the HP Multijet Fusion Technology in the Rapid Prototyping of Wind Turbines with a Vertical Axis of Rotation
Authors: Moczulak Bartosz , Miąskowski Wojciech , Kiński Wojciech , Cader Maciej 
Published: January 2023

Abstract
The article presents steps to be taken when designing a wind turbine with a vertical axis of rotation, based on the modification of the Savonius engine structure. The HP MultiJet Fusion additive manufacturing technology was used and discussed to generate experimental models. The results of numerical and experimental studies of the analyzed geometry of wind turbines, carried out at the Rapid Prototyping Laboratory and the Laboratory of Energy Machines, at the Department of Mechanics and Fundamentals of Machine Design, University of Warmia and Mazury in Olsztyn are presented.
A new finite difference algorithm for boundary value problems involving transmission conditions
Authors: Çavuşoğlu Semih , Mukhtarov Oktay Sh. 
Published: January 2023

AbstractThe finite difference method (FDM) is used to find an approximate solution to ordinary and partial differential equations of various type using finite difference equations to approximate derivatives. The idea is to replace ordinary or partial derivatives appearing in the boundary-value problem by finite differences that approximate them. There is an extensive literature on this topic. But, as a rule, ordinary differential equations or partial differential equations were studied without an internal singular point and without corresponding transmission conditions. It is our main goal here to develop finite difference method to deal with an boundary value problem involving additional transmission conditions at the interior singular point.In this study, we have proposed a new modification of classical FDM for the solution of boundary value problems which are defined on two disjoint intervals and involved additional transmission conditions at an common end of these intervals. The proposed modification of FDM differs from the classical FDM in calculating the iterative terms of numerical solutions. To demonstrate the efficiency and reliability of the proposed modification of FDM an illustrative example is solved b y this method. The obtained results are compared with those obtained by the standard FDM and by the analytical method. Corresponding graphical illustrations are also presented.
On ideal convergence of rough triple sequence
Authors: Kişi Ömer , Gürdal Mehmet , Savaş Ekrem 
Published: January 2023

Abstract
In this paper, we present the ideal convergence of triple sequences for rough variables. Furthermore, sequence convergence plays an extremely important role in the fundamental theory of mathematics. This paper presents two types of ideal convergence of rough triple sequence: Convergence in trust and convergence in mean. Some mathematical properties of those new convergence concepts are also given. In addition, we introduce ideal Cauchy triple sequence in rough spaces.
Onρ−statistical convergence of orderαof sequences of function
Authors: Aral Nazlım Deniz , Kandemir Hacer Şengül , Et Mikail 
Published: January 2023

AbstractIn this study, by using definition ofρ-statistical convergence which was defined by Çakallı [5], we introduce the concepts of pointwisewρα(f)-summability, pointwiseρ-statistical convergence of orderαand uniformρ-statistical convergence of orderαsequences of real-valued functions. Also, we give some inclusion relations between these concepts.
Minimization of the Negative Environmental Impact of Oil Sludge by Using it in the Production of Bitumen
Authors: Serikbayeva Akmaral , Boranbayeva Assiya , Abdibattayeva Maral , Nurbayeva Farida , Cherkeshova Salima , Myrzabekova Asem 
Published: January 2023

Abstract
In this paper, the prevention of negative technogenic impact on the environment of oil sludge by using it as a secondary resource is considered. Oil sludge from various objects of oil fields in Kazakhstan (Mangystau region) has been studied. The possibilities of using oil (after its separation from oil sludge by bioremidiation) as a partial substitute for bitumen base in the production of modified bitumen are considered. The main physical and mechanical characteristics of modified bitumen are determined. The results confirm that the modified bitumen prepared with oil sludge and oil separated by bioremiation method meets the requirements for polymer-bitumen binder to Kazakhstan standards and is suitable for the production of modified bitumen in its physico-chemical characteristics.
A Review of Bio-Based Adhesives from Primary and Secondary Biomass for Wood Composite Applications
Authors: Vamza Ilze , Krigers Guntars , Valters Karlis 
Published: January 2023

Abstract
Today there is a great demand in the market of wood-based panels like medium density fibreboard (MDF), plywood and oriented strand board (OSB). These boards provide functionality in various industrial fields from building to furniture production. All are produced from timber and some type of binding resin, the most often used in Europe are phenol formaldehyde (FF), isocyanate (MDI) and melamine urea formaldehyde (MUF). These resins guarantee sturdiness of the material but are toxic to humans and makes recycling of the wood-based panels very difficult. There are attempts of wood-based panels industry to transition away from fossil-based adhesives. Various resins have been developed using lignin and tannin or protein. Soy based adhesive SOYAD™ has already reached the market, other soy protein-based adhesives are integrated into ultra-low formaldehyde emission particle boards like Nu green 2® and Transform™. This paper gives an overview on bio-based adhesives that are used or have the potential to be used for wood-based panel production.
Interaksi Sosial Fandom Army di Media Sosial Weverse
Authors: Indriani Novia , Kusuma Rina Sari 
Published: January 2023

Weverse merupakan media sosial resmi khusus untuk meng-hosting konten media dan komunikasi antara penggemar dan idola secara langsung sehingga Weverse digunakan oleh para fandom ARMY untuk melakukan interaksi sosial. Tujuan dari penelitian ini untuk mengetahui proses interaksi sosial yang terjadi antara sesama fandom ARMY melalui media sosial Weverse. Penelitian ini menggunakan pendekatan deskriptif kualitatif dengan fenomenologi. Pengumpulan data melalui wawancara dengan lima narasumber yang dipilih dengan teknik purposive sampling dan dokumentasi dari penggunaan Weverse oleh fandom ARMY. Hasil analisis interaksi sosial di Weverse menunjukkan bahwa penggemar tertentu menjadi gatekeeper digital bagi penggemar yang lain. Interaksi tidak hanya untuk memberikan dukungan yang bersifat asosiatif (positif) tetapi juga berfungsi sebagai penyaring pesan dari perilaku disosiatif (negatif) penggemar lain. Weverse is the official social media specifically for hosting media content and direct communication between fans and idols, so Weverse is used by ARMY fandoms for social interaction. This study aims to determine the social interaction process between fellow ARMY fandoms through Weverse. This research used a qualitative descriptive approach using phenomenology. Data were collected through interviews with five participants selected using a purposive sampling technique and documentation of the use of Weverse by the ARMY fandom. The analysis of social interaction in Weverse showed that some fans became digital gatekeepers for other fans. Interactions were not only to provide associative (positive) support but also functioned as message filters for other fans from dissociative (negative) behaviors.
Tipologi Hate Speech di Twitter Terkait Kebijakan Pemerintah Selama Pandemi COVID-19
Authors: Febryanti Dian Rousta , Mahmud Zaki Khudzaifi , Putri Santika Vania , Ovalia Fira Magfira , Sekarwangi Yashinta 
Published: January 2023

Kebijakan yang dibuat oleh pemerintah selama pandemi COVID-19 telah memicu kritik dari banyak pihak dalam bentuk ujaran kebencian. Penelitian ini bertujuan untuk memetakan tipologi atau tema dari ujaran kebencian di Twitter yang ditujukan kepada pemerintah Indonesia mengenai kebijakan yang dibuat selama pandemi COVID-19, sekaligus frekuensi dan pola dari ujaran kebencian yang muncul pada periode Mei – Juli 2020. Penelitian ini menggunakan metode analisis isi dengan data berupa Tweet berbahasa Indonesia di Twitter. Analisis didasarkan pada kata kunci yang didapat secara deduktif dari dataset Indonesian Abusive and Hate Speech Twitter Text. Analisis komputasional menggunakan Python menghasilkan sebanyak 1.042 cuitan bernada ujaran kebencian. Analisis manual menghasilkan 94 cuitan dengan empat tipologi hate speech yang dominan, yaitu personal attack, dehumanisasi, provokasi, dan stereotip negatif. Sasaran hate speech kepada pemerintah ditemukan ditujukan kepada tiga golongan, yakni presiden Joko Widodo, pemerintah pusat, dan pemerintah daerah secara umum. The policies established by the government during the COVID-19 pandemic have sparked criticism from the public in the form of hate speech. This research aims to map the typology and theme of hate speech towards the Indonesian government regarding the policies made during the COVID-19 pandemic as well as the frequencies and patterns of hate speech during May-July 2020. This research conducted a content analysis of tweets in Indonesian on Twitter. The analysis was based on keywords obtained deductively from the Indonesian Abusive and Hate Speech Twitter Text Dataset. The first computational analysis using Phyton obtained 1,042 tweets containing hate speech. The second manual analysis resulted in 94 tweets with four typologies of hate speech: personal attack, dehumanization, provocation, and negative stereotype. This research also found that hate speech mainly targeted three parties, President Joko Widodo, the central government, and the regional government.
Pola Tanam Padi untuk Produktivitas Tinggi dan Indeks Pertanaman yang Optimal di Lahan Rawa Pasang Surut
Authors: Agustiani Nurwulan , Gunawan Indra , Margaret Swisci , Sujinah Sujinah 
Published: January 2023

Optimalisasi penggunaan lahan rawa pasang surut untuk meningkatkan produktivitas dan hasil padi dapat dilakukan dengan peningkatan indeks pertanaman (IP). Penelitian ini dilakukan untuk mendapatkan informasi peluang peningkatan indeks pertanaman melalui penggunaan varietas unggul baru padi. Penelitian dilaksanakan pada Januari-Desember 2019 di Desa Sukaraja, Kabupaten Banyuasin, Sumatera Selatan dengan menguji tiga kombinasi pola tanam yang diulang empat kali. Perlakuan pola tanam yaitu: P1: Regas (musim tanam /MT 1)-Regas (MT 2); P2: Inpara 2 (MT 1)-Inpara 2 (MT 2); P3: Inpara 2 (MT 1)-Inpari 19 (MT 2)-Inpari 19 (MT 3). Regas adalah varietas lokal yang umum ditanam petani, Inpara 2 adalah varietas unggul baru (VUB) adaptif lahan rawa, dan Inpari 19 adalah VUB berumur genjah. Budidaya yang diterapkan yaitu Rawa Pasang Surut Intensif, Super, dan Aktual (RAISA). Pengamatan dilakukan terhadap karakter pertumbuhan dan hasil, serta perbandingan hasil antar pola tanam. Pola tanam padi-padi dengan VUB adaptif rawa (Inpara 2) merupakan pola tanam dengan hasil tertinggi sebesar 11.35 ton ha-1 GKG atau 34.6% lebih tinggi dibanding padi lokal. Indeks pertanaman di lahan rawa pasang surut berpeluang ditingkatkan menjadi tiga kali tanam pada kondisi curah hujan tahunan tinggi dengan didukung pendekatan varietas hasil tinggi dan umur pendek.
Kata kunci: budidaya lahan rawa, optimalisasi lahan, padi rawa, pola tanam, RAISA
Perpektif Baru: Manajemen Vegetasi Bawah Tegakan Pada Budidaya Kelapa Sawit Berkelanjutan
Authors: Yahya Sudirman , Mira Ariyanti  , Yenni Asbur  
Published: January 2023

Sesama tumbuhan, antara tanaman pokok dan tumbuhan lainnya, sampai tingkat tertentu bersaing dalam mendapatkan sumberdaya lingkungan tumbuh, terutama air dan hara media tumbuh, ruang tumbuh dan unsur iklim mikro. Sehubungan dengan ini, tumbuhan atau vegetasi bawah tegakan dapat ditinjau seberapa besar daya menyaingi dibandingkan dengan besar daya manfaat, baik secara langsung bagi tanaman pokok, pengelolaan kebun maupun terhadap segi lingkungan. Pada tinjauan ini akan diungkapkan keberadaan tumbuhan atau vegetasi bawah tegakan yang lazim yang berperanan sebagai penutup tanah dengan berbagai manfaat dalam mewujudkan teknologi produksi kelapa sawit berkelanjutan. Ada beberapa peubah yang lazim diamati sebagai dampak positif penerapan teknologi produksi berkelanjutan, di antaranya: penurunan emisi gas rumah kaca CO2, peningkatan cadangan karbon, biodiversitas lingkungan, perbaikan neraca air dan hara tanah, koservasi tanah dan air, dan penekanan erosi. Dalam naskah ini akan diungkap dan ditelaah beberapa peubah tersebut sebagai dampak teknologi produksi, khususnya oleh dua spesies vegetasi bawah Nephrolepis biserrata dan Asystasia gangetica.
Kata kunci: biodiversitas, cadangan karbon, neraca air, neraca hara
Сontrast enhanced spectral mammography as a tool for accurate diagnosis of cancer on the background of the dense breast tissue
Authors: Chernaya A. V. , Ulyanova R. Kh. , Bagnenko S. S. , Krivorotko P. V. , Artemyeva A. S. , Zhiltsova E. K. , Novikov S. N. , Danilov V. V. , Krzhivitsky P. I. , Meshkova I. E. , Zaitsev A. N. 
Published: January 2023

Introduction. Differential diagnosis of some pathological processes in the breast is difficult on the background of dense breast tissue. This often leads to false conclusions and to late diagnosis of breast cancer (BC) or unreasonable biopsy in a benign process. 50% of breast cancers detected less than 12 months after elective mammography were associated with high density of breast tissue. An important advantage of contrast enhanced spectral mammography (CESM) is that it does not depend on the size of the lesions and the X-ray density of the breast tissue. Objective. To compare the diagnostic performance of CESM and digital mammography (DM) in detection of breast cancer in a group of women with dense breast tissue.Materials and methods. The data of 438 patients with suspected breast cancer examined from August 2018 to January 2021 were analyzed in the study. The mean age of women was 50 ± 11 years (from 21 to 86 years). In the study group 154 (35%) malignant and 284 (65%) benign lesions were identified. All lesions were histologically verified. Breast tissue density corresponded to types A and B in 161 patients and corresponded to C and D types in 277 patients according to the ACR classification. 154 cases of breast cancer were identified, including 49 patients with density A and B and 105 patients with density C and D types.Results. Sensitivity, specificity and overall accuracy of DM were 85.7%, 87.3%, 86.8%, respectively. Diagnostic performance of CESM significantly higher than of DM with sensitivity, specificity and accuracy of 96.8% (p < 0.001), 93.3% (p = 0.015), 94.5% (p < 0.001), respectively. CESM had high positive and negative predictive values of 88.7% (p = 0.012) and 98.1% (p < 0.001), which exceeded those of DM – 78.6% and 91.9%, respectively. The diagnostic performance of DM and CESM were comparable in women with normal breast density (types A and B according to ACR), but in patients with high breast density (types C and D according to ACR), CESM was significantly more sensitive in detecting breast cancer.Conclusion. Thus, diagnostic efficiency of CESM in detecting breast cancer significantly higher in comparison with digital mammography.
Possibilities of MRI in the differential diagnosis of non-lactative mastitis and cancer
Authors: Serebryakova S. V. , Shumakova T. A. , Yukhno E. A. , Safronova O. B. , Serebryakov A. L. 
Published: January 2023

Non-lactational mastitis is an inflammatory process in the breast tissue that is not associated with lactation. The detection of a malignant transformation during inflammation process is often difficult, because it has similar clinical manifestations. Medical approach depends on the characteristics of the processes which are received from the data obtained from radiation diagnostic methods: whether or not there is a nodular formation or infiltrate, cystic cavities, dilatation of the ducts, how the axillary lymph nodes are changed. Diagnostic errors in inflammatory breast diseases are quite common; according to the literature, errors in the interpretation of clinical, mammographic, and ultrasound signs of cancer during inflammation account for up to 53.1% of cases. Inflammation, as well as cancer, in majority of cases is accompanied by a visually detectable increase in blood flow due to proliferation and neoangiogenesis. Magnetic resonance imaging with dynamic contrast enhancement (MRI) is highly sensitive in detecting areas with increased vascularization and makes it possible to assess their nature with a high degree of probability during any changes in the structure of the breast tissue, including edema and inflammatory infiltration. MR signs that allow to make differential diagnosis are a combination of pathological accumulation and lymphadenopathy, which are coded by the BIRADS system as category 4 and only the absence of contrast agent accumulation may suggest an inflammatory nature of the changes. According to the literature, MRI-DCE is a highly sensitive diagnostic method of identifying cancer during inflammation processes. The results of 85 MR studies with clinical manifestations of non-lactational mastitis were analyzed.The purpose of study: is to evaluate the possibilities of magnetic resonance mammography in making a differential diagnosis of non-lactational mastitis and breast cancer.
Doppler twinkling artifact: physical mechanisms and place in diagnostic practice. State of the art
Authors: Gromov A. I. , Sapozhnikov O. A. , Kaprin A. D. 
Published: January 2023

The twinkling artifact has been known to specialists in ultrasound diagnostics since 1996. However, until now there is no understanding of the reasons for its appearance, and the place of its application in diagnostics.Material and methods. Electronic databases (PubMed, E-library, Web of Science) were searched studies using the keyword – “twinkling artifact”. The scientific publications on the Doppler twinkling artifact from the moment of the first reports about its existence is systematized and analyzed. The authors' own developments on this topic are presented. Modern views on this phenomenon and its place in ultrasound diagnostics are described. An explanation of the physical mechanisms of this phenomenon is given.Results. Recommendations are formulated for practitioners on changing the settings of an ultrasound scanner in order to increase twinkling artifact detectability. The directions of using the artifact to obtain additional diagnostic signs of pathological changes, which currently include the diagnosis of nephro-, uretero- and choledocholithiasis, are determined.Conclusions. The high efficiency of the use of the twinkling artifact for the diagnosis of small kidney stones, comparable with the capabilities of computed tomography, has been shown.