bluuebunny/crossref_metadata_2025_split huggingface dataset:
The Spatial Variation of Seismic Ground Motions Under the Magnifying Glass of the Coherency Function Regarding the Smart-1 Array Located in Lotung, Taiwan
Authors: Diaconu Adrian-Aurelian 
Published: December 2024

Abstract
The presented topic contains the calculation procedures and the signals processing concepts used in the studies conducted in the presented report. The spatial variation of seismic ground motions is a phenomenon which regards the modification in terms of the frequency content and phase offset. This phenomenon assumes that the waves pass through soil strata that modify the arrival time of the waves. This idea is called wave passage effect. The incoherence of the waves is caused by the fact that when the waves pass through the soil, they encounter objects which determine them to reflect or refract from the main direction of propagation.
Experimental Studies on Glued Laminated Timber Beams Reinforced With Polymer Fibers
Authors: Teodorescu Ioana , Țăpuşi Daniela , Erbaşu Ruxandra , Savu Adrian-Alexandru , Butucescu Răzvan , Papurcu Andrei 
Published: December 2024

Abstract
The use of wood as building material is considered a viable alternative to other materials in the increased seek of means to fight against the severe negative impact of construction sector on the environment.
The study program aims to performing a series of adherence tests on 6 different specimen types composed by glued laminated timber elements (glulam) joined together with different polymeric materials (FRP - fiber reinforced polymer) by means of a series of different adhesives.
The goal of the study is to find the composition of elements (wood, adhesive and FRP) for optimum specimens from both structural and economic point of view.
Furthermore, a detailed analysis has been made on how to implement these new materials in the nowadays construction sector.
Artificial Neural Network Approach to Predict Carbonation Depth in Metakaolin, Brick Powder and Calcined Sediments-Modified Mortars
Authors: Benamar Souheyla , Kameche Zine El Abidine , Mamoune Sidi Mohamed Aissa , Siad Hocine , Houmadi Youcef 
Published: December 2024

Abstract
This research uses Artificial Neural Network (ANN) as a soft computing technique to predict the carbonation depth and service life of cementitious materials with low clinker content. For this purpose, different mortars were prepared with 0, 10, 15, 20, 25 and 30% replacement levels of cement by metakaolin (MK), brick powder (BP) and calcined sediments (CS). The experimental results of the carbonation depth were obtained under natural and accelerated carbonation conditions for exposure periods of 12 months and 28 days respectively. ANN was utilized taking into account the main influential factors on mortars carbonation, including mix proportions and environmental conditions. For the ANN model, seven datasets were considered as inputs, covering mineral admixture content, cement content, curing time, CO2 concentration, relative humidity, temperature and CO2 exposure time, in addition to one output parameter which is the carbonation depth. The results show that the resistance to carbonation of the mortars decreases with the increase of cement substitution by MK, BP or CS. The network model gives good performance values in the validation and testing set with a lower mean square error (MSE) and a higher determination coefficient (R). The predicted carbonation depths are in good agreement with the experimental measurements of carbonation depths, confirming the efficiency of the developed ANN model to be applied to correctly estimate the carbonation depth of cementitious materials with low clinker content.
The Use of Recurrent Neural Networks (S-RNN, LSTM, GRU) For Flood Forecasting Based on Data Extracted from Classical Hydraulic Modeling
Authors: Rugină Andrei Mihai 
Published: December 2024

Abstract
Floods are natural disasters that have a significant impact on everyday human life, both through material losses and loss of life. In the context of climate change, these events may be more frequent or more dangerous. For real-time flood forecasting, fast methods for determining flood hydrographs along watercourses are needed. Classic hydraulic modeling software provides satisfactory results, but in many cases the calculation time can be high. Another approach, different from classical hydraulic modeling is the use of neural networks for forecasting hydrographs. Thus, the present study aims to analyze three different types of recurrent neural networks, including SRNN, RNN-LSTM, RNN-GRU. For each network type, flow hydrographs and level hydrographs resulting from hydraulic modeling were provided as input and training data. Using the deep learning environment, based on previous calibration and validation of recurrent neural networks, flood hydrographs for 2 historical events were modeled. The obtained hydrographs are extremely close to those recorded, while the running time is tens of times smaller.
Synthesis, characterization, and applications of a novel poly(4-[pyrrol-1-yl methyl]benzoic acid)–silver composite
Authors: Benamrani M. I. , Chikouche I. , Zouaoui A. 
Published: December 2024

Abstract
This article describes the manner in which a novel composite compound was synthesized using a novel method and optimized using a poly(4-[pyrrol-1-yl methyl]benzoic acid) (PPy-b) polymer and very little amount of metallic silver microparticles. The deposition of the polymer film on a fluorine-doped tin oxide (FTO) substrate surface was performed by electrochemical oxidation of the monomer in acetonitrile medium at an imposed potential. The incorporation of silver microparticles was carried out by immersing the modified electrode in a solution of silver nitrate to complex the Ag+ ions with the carboxylic group (COOH) present in the backbone of the polymer, followed by an electrochemical reduction of the complex to precipitate the silver in the form of metallic microparticles in the polymer film. Different characterization techniques (cyclic voltammetry, electrochemical impedance spectroscopy, and surface analysis techniques) were used to optimize the prepared material. Despite the very small quantity of silver (a few micrograms), inserted into the polymer film, the composite material thus obtained had good electrical, optical, and catalytic properties.
Pelatihan dan Produksi Konten Audiovisual untuk Mempromosikan Potensi Wisata di Desa Hargowilis, Kulonprogo
Authors: Marwiyati Marwiyati , Sunarsa Sunarsa , Karna Karna , Angkoso Sutanto Prasetyo , Prasetyo Lilik Jatmiko , Wahyudin Ade 
Published: December 2024

Desa Hargowilis, Kabupaten Kulonprogo, Daerah Istimewa Yogyakarta memiliki potensi besar sebagai desa wisata berkat keindahan alam dan sumber daya lokalnya, misalnya Waduk Sermo dan produk UMKM seperti gula kelapa. Namun, kurangnya promosi digital dan keterampilan masyarakat dalam pembuatan konten audiovisual menghambat pengembangan potensi tersebut. Program pengabdian kepada masyarakat ini bertujuan untuk meningkatkan kompetensi warga desa melalui pelatihan pembuatan konten audiovisual sederhana guna mempromosikan potensi desa dan produk lokal. Kegiatan yang berlangsung selama lima hari melibatkan 6 dosen dan 5 mahasiswa, serta diikuti oleh 20 warga desa dari unsur Karang Taruna dan aparatur desa. Metode pelatihan yang digunakan dalam kegiatan ini bersifat interaktif dan partisipatif, dengan penekanan pada praktik langsung yang didampingi oleh tenaga pengajar yang berkompeten. Hasil dari pelatihan ini adalah tiga karya video yang menampilkan potensi wisata, profil desa, dan UMKM lokal. Meskipun sederhana, karya-karya ini telah menunjukkan peningkatan signifikan dalam keterampilan peserta. Diharapkan melalui pelatihan ini, Desa Hargowilis dapat memanfaatkan teknologi digital untuk mempromosikan potensi lokalnya secara lebih luas. Hargowilis Village, located in Kulonprogo, Yogyakarta, has significant potential as a tourism village due to its natural beauty and local resources, such as Sermo Reservoir and MSME products like Coconut Sugar. However, the lack of digital promotion and residents’ skills in creating audio-visual content has hindered the development of this potential. This community service program aims to enhance the skills of villagers through training in simple audio-visual content production to promote the village’s potential and local products. The five-day program involved 6 lecturers and 5 students, with 20 participants from local youth groups and village officials. The training methods employed in this activity were interactive and participatory, with an emphasis on hands-on practice guided by competent instructors. The result of the training was the production of three videos showcasing the village's tourist attractions, profiles, and local MSME. Although simple, these works demonstrated a significant improvement in participants' skills. It is hoped that through this training, Hargowilis Village can utilize digital technology to promote its local potential more widely.
Possibilities of ultrasound elastography of peripheral nerves in children with type 1 diabetes mellitus
Authors: Fomina S. V. , Zavadovskaya V. D. , Samoilova Iu. G. , Koshmeleva M. V. , Kachanov D. A. , Trifonova E. I. , Zorkaltsev M. A. , Yun V. Е. 
Published: December 2024

Diabetic polyneuropathy (DPN) is a complication of diabetes mellitus (DM) that requires special attention in childhood. The search for new methods for assessing peripheral nerves is an urgent task. Shear wave ultrasound elastography offers additional opportunities for assessing peripheral nerve changes in children with type 1 diabetes.The purpose of the study is to evaluate the parameters of ultrasound elastography of peripheral nerves in children and adolescents with type 1 diabetes mellitus.Material and methods. The study included data from 213 children aged 7-18 years. Of these, 159 children were diagnosed with type 1 diabetes mellitus of varying duration and the control group included 54 children.Ultrasound examination of the peripheral nerves of the lower extremities was performed in all patients using B-mode, shear wave elastography mode.Results. The data obtained during the study indicate the possible use of ultrasound elastography for dynamic monitoring of the condition of peripheral nerves in patients with type 1 diabetes in childhood and adolescence. Peripheral nerves in this category of patients are characterized by higher values of stiffness parameters in ultrasound elastography.
Comparison of diagnostic efficacy of 2D and 3D ultrasound in women under the age of mammography screening
Authors: Garanina A. E. , Kholin A. V. 
Published: December 2024

Breast cancer is the most common cancer among women worldwide. Younger women are more likely than older women to have aggressive molecular subtypes and late-stage disease. Mammography has less sensitivity in detecting breast cancer in women with a dense breast, and 2D ultrasound (2D US) has limitations, such as the specialists high level of skill and experience and the time it takes to perform the examination. Nowadays, there is a new technique – automated volumetric ultrasound scanning of the breast (3D US), which allows you to obtain high-resolution images.Aim. To perform a comparative analysis of the diagnostic efficacy of 2D US and 3D US among women under 40 years of age with high breast tissue density.Methods. A retro-prospective clinical single-center study. From February 2019 to May 2023, 1511 patients under the age of 40 were examined. The patients were divided into two groups. Patients in group A underwent 2D ultrasound, the results of the study were evaluated according to the BI-RADS classification. In addition to 2D ultrasound, the patients who were placed in group B underwent 3D US also with the BI-RADS category. Based on the results of the study, the positive and negative predictive value, sensitivity, specificity and accuracy, as well as the compilation of a predictive model of the method were determined.Results. The 2D US in group A showed sensitivity of 0.8, specificity 1, balanced accuracy of 0.9, and area under the predictive model curve of 0.947, US in group B 0.89, 0.98, 0.94, and 0.903, respectively, and US of the entire sample of 0.87, 0.99, 0.93, and 0.916, respectively. The 3D US in group B showed a sensitivity of 0.95, specificity of 0.99 and a balanced accuracy of 0.97 and an area under the predictive model curve of 0.968.Conclusion. The diagnostic efficiency of 3D US of the mammary glands in patients under 40 years of age is comparable in terms of specificity and is better in terms of accuracy, sensitivity and a better prognostic model of the method compared to US examination in 2D mode. The 3D US method has advantages in comparison with 2D US examination, namely reproducibility, operator independence of the method, reduced examination time, obtaining visualization of the entire organ, improved visualization in multicentric and multifocal processes, the possibility of operational planning, the possibility of “double reading” of the results.
Magnetic-resonance tomography post injection contouring plastic face different type fillers: features of the picture and signal characteristics
Authors: Magomedova S. A. , Vasil´ev A. Yu. 
Published: December 2024

Purpose: to study the possibilities of magnetic resonance imaging in characterizing the soft tissues of the face after injection of various types of fillers.Material and methods. A group of 35 patients with a known cosmetic history was analyzed after combined (15) and non-combined (20) injection injections of fillers into various areas of the face. According to the anamnesis, with combined administration, hyaluronic acid (HA) + Ca hydroxyapatite (CaHA) was used in 10 cases, HA + L­polylactic acid (PLA) in 2 cases, HA + PLA + silicone in 1 case, HA + CaHA + silicone in 1 case, in 1 – HA + silicone. With non-combined administration, 16 patients received HA, 2 received Ca hydroxyapatite, one received L-polylactic acid, and one received polyacrylamide gel (PAGE).MRI of facial soft tissues was performed at different times after drug administration: HA – from 1 month. up to 4 years, CaHA – from 7 days to 1 year, PLA – from 1 to 8 months, silicone – 10–20 years, PAGE – after 6 months.The studies were carried out on 1.5 T MRI scanners, using T2-WI, T1-WI, STIR, DWI (b = 1000), T1-FS-WI, 3D-T2-WI sag. The location of the filler was determined, the type of filler was differentiated, and its location in relation to the surrounding structures was assessed.Results. Areas of the HA preparation were characterized by a hyperintense MR signal on T2-weighted images and Stir, isohypointense on T1-WI. Preparations based on CaHA and PLA were determined by isohypointense on T2, T1-WI, isohyperintense on Stir, iso- and isohyperintense on T1-FS-WI signal. Silicone demonstrated isohypointense signal with a hypointense capsule on T2-WI and Stir isointense on T1-WI; PAGE – isohyperintense on T2-WI and Stir, isohypointense on T1-WI with a hypointense capsule on all PIs.HA-based fillers were more clearly visualized on Stir and T2-WI. Preparations based on CaHA and PLA had identical signal characteristics on T2-WI, which made differential diagnosis difficult, but in a number of cases the following signal changes were detected on T1-FS-WI: iso- and isohypointense from CaHA, isohyperintense from PLA. The MRI picture varied depending on the timing, technique of administration and dilution of the drug.Conclusions. MRI allows you to visualize and differentiate the type of filler after injection contouring according to signal characteristics that depend on its chemical composition, timing of administration and mechanisms of biodegradation.
Changes in uterine hemodynamics after treatment of chronic endometritis
Authors: Ozerskaya I. A. , Porkhovaty S. Ya. , Kazaryan G. G. , Ozhogina E. V. 
Published: December 2024

Objective: to evaluate the hemodynamics of the uterus and endometrium after therapy for chronic endometritis in women of reproductive age.Material and methods. A prospective cohort study of 158 patients with a verified diagnosis of “chronic endometritis” was conducted before and after complex etiotropic therapy. Ultrasound examination was performed in the 1st phase of the menstrual cycle with measurements of Vmax, Vmin, Vmean, PI, RI, the diameter of the uterine arteries with subsequent calculation of the arterial perfusion index. The degree of vascularization of the uterus and endometrium was assessed using the VI, FI, VFI indicators obtained during 3D angioscanning.Results. In the hypoplastic morphotype, there is a persistent decrease in the arterial blood supply to the uterus, which is combined with hypovascularization of the endometrium both before and after treatment. In the hyperplastic morphotype, the arterial blood supply is not impaired, but in the endometrium, hypervascularization detected before therapy is reliably reduced due to the disappearance of venous stasis during treatment. In the mixed morphotype, there are no pronounced disturbances in arterial hemodynamics; the blood supply to the endometrium after treatment significantly increases, which indicates the absence of a violation of venous outflow and the restoration of the macrovascular network of the mucous membrane of the uterine cavity.Conclusion. Pathological blood supply to the uterus and endometrium is associated with the degree of severity of venous outflow disorder and the reparative capacity of the endometrium, which change against the background of complex etiotropic therapy depending on the morphological type, which allows us to judge the therapeutic effect.
Assessment and Comparison Analysis of Cerebral Perfusion SPECT Parameters in Liquidators of the Chernobyl Accident Suffering from Dyscirculatory Encephalopathy Long After Exposure to Radiation
Authors: Kulikova T. A. , Meshkov N. A. , Solodkiy V. A. , Fomin D. K. , Borisova O. A. , Nudnov N. V. 
Published: December 2024

The purpose of the study is to perform comparative analysis of cerebral perfusion SPECT parameters found in liquidators of the Chernobyl accident suffering from dyscirculatory encephalopathy (DEP) long after exposure to radiation and to identify indicators for monitoring their physical condition and assess treatment effectiveness.Materials and methods. We used cerebral single-photon emission computed tomography (SPECT) to examine a group of liquidators of the Chernobyl accident (LCA) and a group of patients who had not been exposed to radiation, all of them suffering from dyscirculatory encephalopathy (DEP). We examined a total of 147 men, including 93 LCAs aged 69.38 (6.42) (the study group) and 54 patients aged 70.70 (7.25) (the comparison group). No differences by age were identified (p = 0.347). The study was performed using General Electric Healthcare Discovery NM/CT 670 Pro. Cerebral scintigraphy was performed using Russian-made Theoxym, 99mTc. Cerebral perfusion imaging was carried out with the help of diacarb (acetazolamide). We compared a total of 22 SPECT parameters.Results. Arterial inflow time in the frontal and back views in both groups increased after taking diacarb by 8.37% (p = 0.138) and 6.62% (p = 0.213) in LCAs and by 15.38% (p = 0.035) and 13.63% (p = 0.037) in the comparison group. Regional cerebral blood flow (rCBF) in the right and left brain hemispheres of LCAs was below the age norm (p = 0.001 and p < 0.001), as well as below the rCBF in the frontal, temporal, parietal, and occipital lobes of the brain in healthy subjects of comparable age (p < 0.001). Average cerebrovascular reserve (CVR) in both groups was lower than the lower end of the normal range (31–75%). Only some of the patients from the comparison group fell within this range: 2.94% of those examined – in the temporal and occipital lobes of the right hemisphere and 8.82% – in the occipital lobe of the left hemisphere. CVR was lower in LCAs than in the comparison group by 14.19 and 14.08% in the frontal lobes of both hemispheres and by 16.31% in the temporal lobe of the left hemisphere; in the occipital lobes, however, it was higher by 29.07 and 12.06%. We found a negative correlation between rCBF and CVR and LCAs’ age, as well as between CVR and radiation dose (p < 0.05).Conclusion. SPECT is a promising method of detecting DEP in LCAs and other patients who have been exposed to radiation, as well as of preventing health complications and assessing treatment effectiveness. A decrease in rCBF and CVR in the frontal and frontotemporal areas of the brain may serve as the criterion for DEP detection.
Dynamic ultrasound control in the second stage of labor
Authors: Mikhailov A. V. , Chernov A. A. , Shman V. V. , Maksimenko A. N. , Yaskarayeva A. B. 
Published: December 2024

Objective. To establish ultrasound characteristics of the dynamics of the fetal head descent along the birth canal during the uncomplicated second stage of labor in the occiput anterior and posterior positions.Materials and methods. The prospective study included 198 women in labor. Spontaneous birth occurred in 180 of them, without the use of augmentation of labor or operative delivery. The remaining 18 women were excluded from the final analysis due to the use of augmentation of labor or operative delivery. The average gestational age was 39 3/7 weeks. The average weight of newborns was 3394 grams; all children were born with an Apgar score of 8 points or more at 5 minutes. All patients in the second stage of labor underwent hourly transperineal ultrasound to assess the angle of progression (AoP) and the delta angle of progression (ΔAoP). According to the AoP values, the following groups were formed: Group 1 - AoP less than 120°, which corresponds to the fetal head station on the parallel plane -1 to -2 cm; Group 2 – AoP 120-144 °, parallel plane 0 to +2; Group 3 – 145–170°, parallel plane from +2 to +5 cm, Group 4 – AoP more than 170°, parallel plane > +5 cm. Statistical analyses were carried out with the use of IBM SPSS Statistics 27 software; the significance of differences between the groups was confirmed by the Long Rank test (p < 0.001) and the Kruskal–Wallis criterion (p < 0.005).Results. In cases of delivery with occiput anterior position, the time to birth was 177 (177–250) min in group 1, 100 (35–240) min in group 2, 75 (30–170) min in group 3, and 35 (15–75) min in group 4. There was no significant difference in ΔAoP between the groups — 16.6 ± 8.5 (10.1–27.1°). In the cases of delivery with posterior occipital position, no patient in group 1 had spontaneous labor with AoP <120°, while the time to birth was 110 (45–240) min in group 2, 75 (110–170) min in group 3, and 65 (18–110) min in group 4. ΔAoP was 12.5 ± 8.5 (11–15.6°).Conclusion. The management of labor with dynamic ultrasound control provides the possibility to obtain objective criteria for the normal course of the second stage of labor, to improve the quality and reliability of the information received, to eliminate unnecessary interventions, and to reduce the number of vaginal digital examinations during childbirth, which has a positive effect on perinatal outcomes, reduces the risk of purulent-septic complications in the mothers, and increases the patients comfort during childbirth.