bluuebunny/crossref_metadata_2025 huggingface dataset:
Regional-Sectoral Characteristics of the Formation of Digital Economy Sectors and Evaluation of Its Innovative Perspectives
Authors: Aliyev Alovsat Garaja
Published: October 2024

The analysis of the characteristics of regional-sectoral approaches to the effective formation of the structure of the modern digital economy and the assessment of their innovative perspectives are considered urgent issues. In this aspect, the analysis of the scientific-theoretical foundations and formation problems of the information economy as the main element of the digital economy has been attempted. The structural features and characteristics of the digital economy were studied, and the method of evaluating the innovative perspectives of its sectors was developed. New information, knowledge, and technology-intensive economic sectors have been identified. The method of assessing the perspective of sub-sectors of the digital economy was developed in the form of a sequence of certain algorithmic steps. In the evaluation process, the selection of organizations and experts, the determination of the experts' weighting coefficients, and the indicators for assessing the perspective of sub-fields were also determined by the experts themselves. As a result of the assessment of the innovative perspectives of the subfields of the digital-information economy, the level of innovativeness of the relevant sectors, the level of potential development, the level of the possibility of creating new jobs, the level of social utility, the level of influence on the development of other areas, the level of current infrastructure provision and cyber resistance, the level of necessary staffing, export orientation indicators such as level, green, inclusion and sustainability level, competitiveness level have been adopted. The results of the generalized systematic analysis and evaluation of the research results of the preliminary expert evaluations of the digital economy sectors on the innovative perspective are given schematically. It has been shown that effective results can be achieved with the application of modern computer software in the formation of digital economy sectors based on the technologies of the Industry 4.0 platform and in the assessment of its innovative prospects. Those results can be effectively applied in other regional-sectoral structures with relevant characteristics.
Attraction of Mining Lands From the Jiu Valley Basin in Public and Private Utility Projects
Authors: Radu Sorin Mihai , Gâf-Deac Ioan , Vesa Benea Mărioara , Danci Marius Daniel , Flinker Alexandru , Ceuţă Simona , Bocşiţan Mariana Valentina , Stanca Iulian Marius
Published: October 2024

In the article, the authors report on the diversified perspective on the various aspects of the mining sector in Valea Jiului with reference to the attraction of mining land in new investment projects from those interested in the public and private sphere. It is stated that the mining lands offer opportunities for expansion of reserves or zonal development in the future; mining land can be attractive to investors because it offers prospects for long-term growth and profitability. The authors present data on the disposal of mining lands unloaded of technological burdens, make an updated inventory of mining lands in the Valea Jiului Basin available for expressions of interest in expropriation and inclusion in new zonal development programs. At the same time, a model is proposed for the recovery of the affected mining lands, practically analyzing the influence of the "mechanized felling" system to avoid surface subsidence. Details are given about the lack of mining security, land damage through subsidence, and it is recommended that each mining unit be equipped and operate with a distinct silting station, taking into account the objective requirement to protect against the loosening of the rock massif of the land up to date, above the exploitation perimeters.
Evidence-Based Practice (EBP) in the Professional Practice of Nurses
Authors: Dolega Elżbieta , Szara Marta , Kościołek Aneta
Published: October 2024

Aim. The purpose of this study was to analyze the application of Evidence Based Practice (EBP) in the professional practice of nurses.

Material and methods. The study involved 151 active professionals in the nursing profession. The study was conducted using the diagnostic survey method, the tool was the Standardized Evidence-Based Practice Profi le Questionnaire (EBP2Q), Polish adaptation: M.Pańczyk (2017). A 5% error of inference and an associated signifi cance level of p<0.05 were assumed.

Results. The lowest scores were obtained by the respondents on the subscale Frequency of use of specifi c elements of Evidence-Based Practice in daily clinical work (M=21.5 points, 47.8% of the maximum score), and on the subscale Knowledge of knowledge of research terminology (M=45.5 points, 53.5% of the maximum score). Statistically signifi cant associations were found between age, education, seniority of the subjects and the studied aspects of EBP (p<0.05).

Conclusions. 1. The application of EBP in the professional practice of nurses is at a low and insufficient level. 2. Nurses present a low level of knowledge related to EBP topics. 3. Along with their younger age, higher level of education, shorter length of service of the subjects, EBP was signifi cantly more frequently used in the daily practice of the subjects.
Non-Uniform Torsion Behavior of Thin-Walled Beams According to the Finite Element Method
Authors: Tran Dang-Bao
Published: October 2024

This study is based on a theory for analyzing non-uniform torsion in thin-walled beams made of homogeneous elastic material with arbitrary cross-sections by incorporating the effect of the shear deformation of a cross-section. Utilizing the Finite Element Method (FEM), the proposed numerical approach addresses non-uniform torsion by breaking down a 3D analysis into 2D cross-sectional and 1D modeling components. Initially, the geometric constants of the cross-section were computed using a 9-node isoparametric element in 2D FEM. Subsequently, a 1D FEM employing a linear isoparametric element calculated the twist angle, torsion warping parameters, and stress results. The stress field was determined through a local analysis of the 2D cross-section. Notably, the 2D FEM component aligns with contemporary trends in commercial software, thereby bolstering the potential and practical applicability of the proposed numerical approach. Its verification and validation through numerical analyses using MATLAB underscore the efficacy and reliability of the method in analyzing non-uniform torsion behavior in structural design, particularly under diverse boundary conditions.
Effect of Polypropylene Fiber on the Strength Properties of Geopolymer Concrete Activated with Water Glass
Authors: Sangi Rajashekar , Bollapragada Shesha Srinivas , Kandukuri Shanker
Published: October 2024

Cement, which is a significant constituent in concrete, plays a crucial role in the construction industry. The manufacturing process of cement releases substantial amounts of CO2, thereby contributing to environmental concerns. To address this issue, geopolymers have emerged as promising alternative substitutes to ordinary Portland cement. However, one of the challenges in utilizing geopolymer binders is the need for activators to initiate the polymerization process. Sodium silicate and sodium hydroxide solution are commonly used activators, but ground granulated blast-furnace slag (GGBS) reacts quickly with these activators and reduces the setting time. In order to arrest quick settings and enhance the efficiency of concrete production, “water glass” is used as an activator. The present study investigates the flexural and split tensile strength of geopolymer concrete by optimizing the dosage of polypropylene fibers for different mix proportions of GPC activated with water glass. The optimum dosage of fibers was obtained by the addition of different dosages of polypropylene fibers ranging from 0, 0.2%, 0.4%, 0.6% and 0.8%. The results from the investigation revealed a consistent augmentation in compressive strength with the incremental addition of fibers up to a threshold of 0.6%; beyond this point, the strength exhibited a dimin-ishing trend, while the flexural strength and split tensile strength were enhanced from 25% to 45% with the addition of an optimum dosage of polypropylene fibers. By optimizing the material formulations and mix proportions, it is possible to achieve a superior performance by minimizing the environmental impact on the construction industry.
Modelling the Entry Capacity Reduction Factor and Pedestrian Movement Analysis at Roundabouts: A Case Study of Tier-II Cities in India
Authors: Munshi Aarohi Kumar , Patnaik Ashish Kumar , Bhuyan Prasanta Kumar
Published: October 2024

The present study is aimed at developing an entry capacity reduction factor model for roundabouts in developing countries. The study covers four Tier-II cities in India, namely, Ranchi, Rourkela, Bhubaneswar, and Nagpur. The explanatory variables are: the circulating vehicular traffic flow, pedestrian flow, and the diameter of the central island. A multiple non-linear regression (MNLR) analysis was utilised; it has an R2 of 0.946 and 0.961 for the development and validation of the model. With an increase in influencing variable levels such as circulating vehicular traffic flow by [(50, 100, and 150) PCU/hr], pedestrian flow by [(50, 100, and 150) Ped/hr], and the diameter of central island by [10,20,30) m]; the Capacity Reduction Factor rises by (15%, 30% & 35%), (10%, 15% & 20%) and (25%, 35% & 45%) respectively. Further, the Equilibrium Probability Method (EPM) has been employed to analyse pedestrian movement patterns at roundabouts while they are crossing the streets. ‘Children’ and ‘Seniors’ cross the street almost at the same speed, but more slowly than ‘Young People’. The study could be helpful for the operational evaluation of roundabouts by incorporating pedestrian behaviour.
JURNALISTIK PENYIARAN DAN PEMILIHAN UMUM DI INDONESIA
Authors: Harmonis Harmonis
Published: October 2024

Kajian tentang jurnalistik penyiaran hingga studi ini dilakukan, masih terbatas dilakukan oleh para peneliti. Dari kajian yang terbatas tersebut lazimnya juga masih sebatas masalah jurnalistik secara umum. Untuk memperbanyak hasil studi tentang isu di atas, kajian ini bertujuan untuk mengetahui tentang gambaran dari pesan yang terkandung pada gendre program berita yang didiseminasikan oleh media penyiaran televisi swasta nasional berkenaan dengan pemilihan umum (Pemilu) tahun 2019 di Indonesia dan hubungannya dengan tugas pokok serta fungsi (tupoksi) yang seharusnya dilaksanakan oleh lembaga penyiaran. Yakni peraturan perundang-undangan yang menjadi panduan dalam segala aktivitas penyiaran, khusus undang-undang nomor 32 tahun 2002 tentang Penyiaran dan Peraturan Komisi Penyiaran Indonesia Pusat (KPIP) nomor 01/P/KPI/03 tahun 2012 tentang Pedoman Perilaku Penyiaran (P3) dan nomor 02/P/KPI/03 tahun 2012 tentang Standar Program Siaran (SPS). Teori utama yang dipergunakan adalah broadcasting, jurnalistik penyiaran dan pemilu. Sedangkan metode yang dipergunakan adalah metode penelitian kualitatif, dengan teknik pengumpulan data melalui dokumen yang diperoleh melalui media online ataupun offline serta diperbanyak melalui wawancara dengan sumber informasi yang dipahami memiliki kompetensi dibidang jurnalistik penyiaran, khususnya jurnalistik penyiaran televisi dalam konteks Pemilu. Hasil kajian memperlihatkan bahwa berita-berita yang didiseminasikan oleh media penyiaran televisi berita nasional tentang pemilu tahun 2019, khususnya tentang pemilu presiden dan wakil presiden Indonesia, masih belum sepenuhnya melaksanakan amanah yang terdapat pada UU Nomor 32 Tahun 2002, khususnya Pasal 5, Pasal 36, ayat (4) dan (6), dan pasal 42. Maupun P3SPS. BAB XVIII Program Siaran Jurnalistik, Bagian Satu Prinsip-Prinsip Jurnalistik Pasal 40. Dan KEJ. Pasal 1 dan 3.
Risk factors for anastomotic leakage following McKeown esophagectomy: a single-center retrospective analysis
Authors: Toneev E. A. , Pikin O. V. , Aleksandrov O. A.
Published: October 2024

The OBJECTIVE was to identify risk factors for anastomotic leakage following McKeown esophagectomy.

METHODS AND MATERIALS. From January 1, 2016 to December 31, 2022, in our clinic, a total of 69 patients with stage I–III esophageal cancer were operated with McKeown esophagectomy performed in a fully open approach (thoracotomy, laparotomy, cervicotomy). The characteristics of the studied patients were evaluated according to a standardized protocol. Statistically significant factors influencing the development of anastomotic failure were determined.

RESULTS. The frequency of anastomotic leakage was 13/69 (18.4 %). Mortality due to anastomotic failure occurred in 3 (23 %) patients; while in the non-failure group, there were 4 (7.1 %) fatalities. The average postoperative hospital stay was 11.57±3.71 days in the non-leakage group and increased to 25.42±8.12 days in the leakage group (p=0.001). Univariate analysis revealed that the presence of diabetes mellitus, postoperative blood transfusions, and higher than Grade III chronic kidney disease significantly influenced anastomotic integrity. These factors were selected for multiple logistic regression analysis. In multivariable logistic regression only chronic kidney disease and diabetes mellitus were confirmed as significant risk factors for anastomotic failure; Type III and IV failures occurred in 5/13 (38.5 %) patients resulting in death for three individuals (23 %).

CONCLUSIONS. In univariate analysis, diabetes mellitus, chronic kidney disease and perioperative blood transfusion were recognized as statistically significant risk factors associated with anastomotic leakage following McKeown esophagectomy. Unsatisfactory outcomes occurred with leakage type III and IV.
Tubular doubling of the caecum dome with two phlegmonously altered appendixes in a child
Authors: Okunev N. A. , Okuneva A. I. , Kalabkin N. A. , Shabunina Ju. N.
Published: October 2024

Anomalies of the appendix are rare malformations that are most often diagnosed intraoperatively and do not have a specific clinical picture. The article describes a clinical case in a 6-year-old 4-month-old boy who was admitted to the hospital with symptoms of appendicitis. According to urgent indications, diagnostic laparoscopy was performed, during which two phlegmonously altered appendixes were identified. The diagnosis was « Acute phlegmonous appendicitis of two appendixes. Loose periappendicular infiltrate. Congenital developmental pathology: Tubular doubling of the caecum dome with appendixes ». Laparoscopic appendectomy was performed. Thus, this article describes the rare clinical case of tubular doubling of the caecum dome with phlegmonously altered appendixes.
Gerakan Anti Bulliying untuk Mencegah Maraknya Bulliying di Sekolah
Authors: Elfi Rimayati
Published: October 2024

Penelitian ini bertujuan untuk mendapatkan informasi sebanyak-banyaknya terkait Gerakan anti bullying di sekolah. Dengan menggunakan studi kepustakaan, peneliti mendapatkan banyak data baik hasil riset, tulisan /pendapat pakar, praktisi, guru dan masyarakat. Hasil dari penetian ini adalah : devinisi bullying, mitos seputar bullying di satuan Pendidikan, yang bullying, Upaya pencegahan prilaku bullying di satuan Pendidikan serta Gerakan anti bullying di sekolah. Beberapa contoh Gerakan anti bullying aadalah (1) Riset tentang Komik Strip Solusi Inovasi Gerakan Anti Bullying (2) Keterlibatan dan kolaborasi orang tua degan pihak sekolah, (3) melaunching Gerakan Pelopor Anti Bullying melalui Olimpiade Anti Bullying Tingkat Nasional bagi pelajar Tingkat SD/MI, SMP/MTs dan SMA/SMK/MA, (4) Peluncuran Buku Panduan Melawan Bullying oleh Dinas Pemberdayaan Perempuan dan Perlindungan Anak Kota Semarang
A challenge for geomarketing in developing countries
Authors: Allo Nicholas
Published: October 2024

Efforts are continually made from within and outside developing countries, to better understand the consumer and customer distribution, for the purpose of devising and delivering a more accurate means to market insight within such regions. Despite some of the efforts being made, it appears there still is an inability to achieve a similar level of market and/or population insight as there is available for most developed countries. It is anticipated, however, that hindrances to achieving the market insight desired may be akin to issues such as market entry via locations with greater disposable incomes comparative to similar locations, data limitations â€” inconsistencies, limited accessibility, geographies used consisting administrative boundaries and lacking information structure â€” and insufficient efforts from academia on this subject matter when compared to private-sector efforts, which are likely to present a bias suited to their own purposes.
The Theory of Fairness with Integrity in Indonesia’s Electoral Justice System
Authors: Raden Sahran
Published: October 2024

This paper describes the concept of a fairness theory of justice with integrity applied in elections in Indonesia, drawing on the transformation of John Rawls' fairness theory. This theory is employed to examine various components of the electoral legal framework, focusing on the technical implementation of elections and the resolution of electoral disputes to achieve electoral justice in Indonesia. The research utilizes normative legal methodology, characterized by dogmatic legal analysis and theoretical-rational reasoning, employing a logical-deductive approach. It constructs the facts of electoral justice through an extensive review of legal literature and relevant data sources concerning the electoral process in Indonesia. The study addresses electoral practices as instruments of popular sovereignty, highlighting dissatisfaction among stakeholders regarding the election process. The theoretical variables associated with fairness with integrity are critically analyzed for their applicability in fostering electoral justice in Indonesia, emphasizing that a fundamental aim of electoral law enforcement is to ensure the realization of electoral justice.
Scikit-build-core
Authors: Schreiner Henry , Fillion-Robin Jean-Christophe , McCormick Matt
Published: October 2024

Discover how scikit-build-core revolutionizes Python extension building with its seamless integration of CMake and Python packaging standards. Learn about its enhanced features for cross-compilation, multi-platform support, and simplified configuration, which enable writing binary extensions with pybind11, Nanobind, Fortran, Cython, C++, and more. Dive into the transition from the classic scikit-build to the robust scikit-build-core and explore its potential to streamline package distribution across various environments.
Supporting Greater Interactivity in the IPython Visualization Ecosystem
Authors: Martindale Nathan , Smith Jacob , Linville Lisa
Published: October 2024

Interactive visualizations are invaluable tools for building intuition and
supporting rapid exploration of datasets and models. Numerous libraries in
Python support interactivity, and workflows that combine Jupyter and
IPyWidgets in particular make it straightforward to build data analysis
tools on the fly. However, the field is missing the ability to arbitrarily
overlay widgets and plots on top of others to support more flexible
details-on-demand techniques. This work discusses some limitations of the
base IPyWidgets library, explains the benefits of IPyVuetify and how it
addresses these limitations, and finally presents a new open-source solution
that builds on IPyVuetify to provide easily integrated widget overlays in
Jupyter.
Mandala: Compositional Memoization for Simple & Powerful Scientific Data Management
Authors: Makelov Aleksandar
Published: October 2024

We present mandala, a Python library that largely eliminates the accidental complexity of scientific data management and incremental computing. While most traditional and/or popular data management solutions are based on logging, mandala takes a fundamentally different approach, using memoization of function calls as the fundamental unit of saving, loading, querying and deleting computational artifacts.

It does so by implementing a compositional form of memoization, which keeps track of how memoized functions compose with one another. In this way: (1) complex computations are effectively memoized end-to-end, and become ‘interfaces’ to their own intermediate results by retracing the memoized calls; (2) all computations in a project form a single computational graph, which can be explored, queried and manipulated in high-level ways through a computation frame, which is a natural generalization of a dataframe that replaces columns by a computation graph, and rows by (partial) executions of this graph.

Several features implemented on top of the core memoization data structures — such as natively and transparently handling Python collections, in-memory caching of intermediate results, and a flexible versioning system with dynamic dependency tracking — turn mandala into a practical and simple tool for managing and interacting with computational data.
Computational Resource Optimisation in Feature Selection under Class Imbalance Conditions
Authors: Udu Amadi Gabriel , Lecchini-Visintini Andrea , Gunn Steve R. , Osa-uwagboe Norman , Ghalati Maryam Khaksar , Dong Hongbiao
Published: October 2024

Feature selection is crucial for reducing data dimensionality as well as enhancing model interpretability and performance in machine learning tasks. However, selecting the most informative features in large dataset often incurs high computational costs. This study explores the possibility of performing feature selection on a subset of data to reduce the computational burden. The study uses five real-life datasets with substantial sample sizes and severe class imbalance ratios between 0.09 – 0.18. The results illustrate the variability of feature importance with smaller sample fractions in different models. In this cases considered, light gradient-boosting machine exhibited the least variability, even with reduced sample fractions, while also incurring the least computational resource.
Python-Based GeoImagery Dataset Development for Deep Learning-Driven Forest Wildfire Detection
Authors: Martin Valeria , Morgan Derek , Venable K. Brent
Published: October 2024

In recent years, leveraging satellite imagery with deep learning (DL) architectures has become an effective approach for environmental monitoring tasks, including forest wildfire detection. Nevertheless, this integration requires substantial high-quality labeled data to train the DL models accurately. Leveraging the capabilities of multiple Python libraries, such as rasterio and GeoPandas, and Google Earth Engine’s Python API, this study introduces a streamlined methodology to efficiently gather, label, augment, process, and evaluate a large-scale bi-temporal high-resolution satellite imagery dataset for DL-driven forest wildfire detection. Known as the California Wildfire GeoImaging Dataset (CWGID), this dataset comprises over 100,000 labeled ’before’ and ’after’ wildfire image pairs, created from pre-existing satellite imagery. An analysis of the dataset using pre-trained and adapted Convolutional Neural Network (CNN) architectures, such as VGG16 and EfficientNet, achieved accuracies of respectively 76% and 93%. The pipeline outlined in this paper demonstrates how Python can be used to gather and process high-resolution satellite imagery datasets, leading to accurate wildfire detection and providing a tool for broader environmental monitoring.
Pengaruh Model Pembelajaran Game Based Learning Berbantuan Media Baamboozle Terhadap Motivasi dan Hasil Belajar Biologi Kelas X SMA 2 Tenggarong Sebrang
Authors: Nugraha Samuel Eka , Kurniawati Zenia Lutfi , Lumowa Sonja Verra Tinneke , Turista Dora Dayu Rahma
Published: October 2024

Pembelajaran biologi saat ini memiliki masalah yang dimana ada beberapa siswa-siswi yang tidak menyukai mata pelajaran biologi disebabkan banyak hal baik dari murid, media, buku dan guru, yang di gunakan dalam pembelajaran biologi, permasalahan ini menyebabkan motivasi dan hasil belajar terpengaruh, Penelitian ini bertujuan untuk mengetahui pengaruh model pembelajaran Game based learning (GBL) berbantuan media Baamboozle terhadap motivasi dan hasil belajar biologi siswa kelas X SMA 2 Tenggarong Seberang. Penelitian menggunakan model penelitian quasi eksperimental, Penelitian ini akan dilaksanakan di SMA Negeri 2 Tenggarong Seberang selama Penelitian dilaksanakan dari bulan Februari-Mei 2024. Penelitian ini memberikan angket dan butir soal pre-test dan post-test.  didapat data hasil belajar yaitu pada kelas eksperimen rata-rata nilai 79,69. Kelas kontol 66,03, pada hasil angket motivasi diperoleh rata-rata dari kelas eksperimen 82,69 dan kelas kontrol 73,86, sehingga penerapan model pembelajaran Game based learning (GBL) berbantuan media baamboozle berpengaruh signifikan terhadap motivasi dan hasil belajar biologi siswa kelas X SMA 2 Negeri Tenggarong Seberang.
Weight gain during pregnancy and its impact on maternal autonomic modulations and birth outcomes
Authors: Sharma Sowmya , Thomas Tinku , Sambashivaiah Sucharita
Published: October 2024

Objectives:

The study aimed to compare the heart rate variability (HRV) indices, a measure of cardiac autonomic modulation, and birth outcomes in mothers with below-adequate and adequate gestational weight gain.

Materials and Methods:

Eighty mothers (with low to normal body mass index [BMI]) were recruited in their first trimester. Fifty-one mothers were followed up throughout pregnancy. Maternal electrocardiogram (ECG) and anthropometry were collected at each trimester. Power spectral analysis was performed on ECG, and HRV indices were derived. Birth outcomes and anthropometric data were collected at birth. Participants were classified based on the Institute of Medicine (IOM) recommendations for weight gain into below adequate weight gain (BWG) group and adequate weight gain (AWG) group (cutoff of 12.5 kg for low BMI mothers and 11.5 kg for normal BMI mothers).

Results:

Mean weight gain during pregnancy was 9.6 ± 3.4 kg. Delta low frequency (LF), a marker of cardiac sympathetic activity (difference between the 1st and 3rd trimester), was lower (P < 0.05) among the BWG group (−377.5 ± 686 ms2) compared to the AWG group (−741.1 ± 581 ms2). Spearman’s correlation demonstrated a positive association between delta LF and birth weight (r = 0.34, P < 0.05) in the BWG.

Conclusion:

Irrespective of BMI status, mothers gained lower weight than the (revised) IOM recommendations. BWG had decreased sympathetic modulations during pregnancy. Birth weight was positively correlated with greater sympathetic modulations even among women in BWG, thus highlighting the need to monitor autonomic modulations, along with weight gain during pregnancy effectively.
Hemodynamic analysis of a thrombosed bleb in an unruptured cerebral aneurysm
Authors: Satoh Toru
Published: October 2024

Background:

The intricate hemodynamic mechanisms of thrombosis in the bleb and/or dome of cerebral aneurysms remain unresolved. We encountered a unique case where the bleb of an unruptured internal carotid-posterior communicating artery (IC-PC) aneurysm underwent thrombosis over 7 years. Complete spontaneous thrombosis of a bleb in an unruptured cerebral aneurysm has not been previously reported. Therefore, a hemodynamic evaluation using computational fluid dynamics (CFD) analysis was conducted to examine the thrombotic development within the bleb of this aneurysm.

Case Description:

We observed a case in which thrombosis led to the disappearance of a bleb in the dome of an unruptured IC-PC aneurysm over 7 years. CFD analysis was employed to investigate the hemodynamics of bleb thrombosis and the thrombosed bleb-neck regions of the dome in this IC-PC aneurysm. The reduction and disappearance of the bleb were associated with a decreased flow rate within the bleb, reduced magnitude of wall shear stress (WSSm), a lower WSSm ratio between the bleb and dome, increased vector direction of wall shear stress (WSSv), and discrete streamlines entering the bleb-neck region, resulting in stasis and subsequent thrombosis within the bleb. Seven years later, the dome region corresponding to the thrombosed bleb-neck exhibited localized areas with low WSSm and high WSSv along the dome wall.

Conclusion:

Hemodynamically, spontaneously thrombosed bleb and thrombosed post-bleb-neck dome walls were characterized by low WSSm and high WSSv. These findings underscore the importance of CFD analysis in predicting thrombotic events in cerebral aneurysms, which can inform better clinical management strategies.
Minimally invasive presigmoid retrolabyrinthine suprameatal approach (PRSA): A cadaveric study for accessing premeatal anterior inferior cerebellar artery (AICA) aneurysms
Authors: Hoz Samer S. , Palmisciano Paolo , Ismail Mustafa , Muthana Ahmed , Doyle Edward J. , Johnson Mark D. , Forbes Jonathan A. , Prestigiacomo Charles J. , Samy Ravi , Zuccarello Mario , Andaluz Norberto
Published: October 2024

Background:

The surgical management of aneurysms involving the proximal third of the anterior inferior cerebellar artery (AICA) usually necessitates complex and invasive approaches, thus posing major challenges. We aimed to investigate the infratentorial presigmoid retrolabyrinthine suprameatal approach (PRSA) as a surgical corridor for premeatal AICA aneurysms.

Methods:

We performed 10 PRSA dissections in five cadaveric heads. Twelve morphometric parameters were measured, analyzed, and categorized into pre-procedural, intra-procedural, and additional parameters. The typical anatomic-radiological characteristics and variations were evaluated, and the related anatomical and radiological parameters were analyzed to predict surgical accessibility.

Results:

Preoperative anatomic-radiological parameters provide valuable information to select patients with favorable anatomy that may offer appropriate surgical accessibility to the premeatal AICA through a PRSA corridor. The position of the basilar artery from the midline determines the degree of accessibility to the origin of AICA through the infratentorial PRSA. The PRSA for targeting proximal AICA aneurysms was also compared to other surgical approaches based on the available current literature.

Conclusion:

Premeatal AICA aneurysms can be accessed and clipped through the infratentorial PRSA corridor. This would allow surgeons to avoid the sacrifice of hearing and balance as compared to other available invasive alternative approaches. The selection of the appropriate patients should be based on the individualized preoperative radiological characteristics for both the vascular and bony anatomy.
Brainstem congestion as the initial presentation of cavernous sinus dural arteriovenous fistula without ocular symptoms
Authors: Goto Hiroki , Fujita Atsushi , Nakamura Naoto , Kohta Masaaki , Sasayama Takashi
Published: October 2024

Background:

Cavernous sinus dural arteriovenous fistula (CSDAVF) is an abnormal arteriovenous connection involving the dura mater within or adjacent to the wall of the cavernous sinus. While cases with superior ophthalmic vein drainage and ocular symptoms are typical, we report a rare case of CSDAVF draining into the perimedullary vein of the medulla oblongata and spinal cord and causing cerebellar ataxia and myelopathy as the initial presentation.

Case Description:

A 73-year-old man presented with vertigo and rapidly progressing gait disturbance. Digital subtraction angiography revealed a left CSDAVF draining only into the spinal perimedullary veins, which was classified as Cognard type V. We performed a transvenous embolization through the occluded left inferior petrosal sinus and achieved a super-selective shunt occlusion using three platinum coils. The postoperative course was uneventful with immediate improvement of symptoms.

Conclusion:

CSDAVF should be considered as a differential diagnosis in a patient with venous congestion in the brainstem.
Düzeltme: Hasan Dağı Volkanı ve Çiftlik-Bozköy (Orta Anadolu) Gömülü Kalderasını Besleyen Aktif Magma Odalarına İlişkin Isı Transferi AnalizleriDüzeltme
Authors: Karaoğlu Özgür
Published: October 2024

Karaoğlu (2024) makalesinde Şekil 2’ye ait şekil altyazısı hatalı sunulmuştur. Şekil 2’nin düzeltilmiş Türkçe ve İngilizce alt yazısı ve ilgili şekil aşağıda düzeltilerek sunulmuştur.
Peculiarities of modern development of relations between states in the Arctic region
Authors: Mitko A. V. , Sidorov V. K.
Published: October 2024

With the beginning of the 20th century, after the end of the Cold War and the decline of tensions in the world, relations between states also underwent changes. This became especially noticeable in places with complex infrastructure and extreme living conditions. For many years, the Arctic remained a territory of calm and progressive development, primarily related to scientific research. However, the events that we discussed above forced countries to treat the Arctic region differently. Today, the Arctic is considered a territory with potentially inexhaustible resources, which can provide solid economic growth to any state in the long term. All of the above presupposes a clear definition of borders by states on the basis of international treaties and acts, as well as the resolution of all contentious issues exclusively at the negotiating table. It is necessary to do everything so that during the period of sanctions and complex international relations, the Arctic remains a territory of peace.
МЕТОДИКА ОЦЕНКИ ДЛИНЫ УСТАЛОСТНЫХ ТРЕЩИН ПРИ ИХ ЗАЛЕЧИВАНИИ ИМПУЛЬСНЫМ ТОКОМ
Authors: Муругова О.В. , Нагимов М.И. , Халикова Г.Р. , Дмитриев С.В.
Published: October 2024

В последнее время ведутся интенсивные исследования по залечиванию усталостных трещин путём пропускания импульсов электрического тока высокой плотности. При этом возникает задача определения на сколько укоротилась трещина за счёт оплавления материала в вершине трещины, вызванного джоулевым разогревом. Сложность решения этой задачи состоит в том, что после частичного заваривания трещины непросто определить местоположение вершины трещины с использованием оптического микроскопа. Определение точного местоположения вершины трещины также затруднено для образцов с загрязненной или корродированной поверхностью. В данной работе предложен подход к оценке длины трещины в образцах на усталостное нагружение, основанный на решении задачи теории упругости в двумерной постановке. Методом конечных элементов решена задача определения раскрытия трещины при нагружении консольно закреплённых образцов изгибающей нагрузкой в упругой области. Рассчитаны максимальные напряжения Мизеса в образце при нагружении единичной изгибающей силой. Величину раскрытия трещины можно измерить с помощью оптического измерительного микроскопа и по результатам расчёта определить длину трещины. Для тестирования предложенного подхода проведены экспериментальные исследования на полосках из титанового сплава ВТ6 с зеркально полированной поверхностью, которая позволила измерить длину усталостной трещины с помощью оптического микроскопа. Было получено три образца с трещинами разной длины, для которых проведены испытания на изгиб с измерением величины раскрытия трещины с помощью оптического микроскопа. Кроме того, длина трещины определялась из конечно-элементного расчёта, связывающего длину трещины с величиной её раскрытия при заданной нагрузке. Экспериментальные результаты хорошо согласуются с результатами моделирования.
COMPARATIVE ESTIMATION OF AUTOMATIC CHARGING AND EXCHANGE-CHARGING STATIONS FOR MAINTENANCE OF SMALL ELECTRIC UNMANNED AERIAL VEHICLES
Authors: Фетисов В.С. , Ахмеров Ш.Р.
Published: October 2024

Для обеспечения выполнения малыми электрическими БЛА своих функций в течение длительных временных интервалов требуются средства для подзарядки или замены бортовых источников питания. Проще всего это делать с помощью специальных наземных сервисных станций. В статье обсуждаются два варианта реализации таких станций – автоматические зарядные станции и автоматические обменно-зарядные станции. Сравнение сделано с точки зрения экономической целесообразности их применения. Приведены соответствующие схемы оценочных расчетов с примерами.

To obtain continuous functioning for small electric unmanned aerial vehicles it is necessary to have some means for charging or changing on-board batteries. It can be easy realized with special ground service stations. Two variants of such stations are discussed in this paper – automatic charging stations and automatic exchangecharging stations. Comparision are made from the viewpoint of economical reasonability of application for both types of stations.
Concept of dynamic positioning system for unmanned small-class underwater vehicles based on visual odometry
Authors: Алиагаев А.Р. , Ажмухамедов И.М. , Хоменко Т.В.
Published: October 2024

Статья посвящена актуальной проблеме подводной робототехники – задаче динамического позиционирования необитаемых подводных аппаратов малого класса. Особое внимание уделено способам навигации необитаемых подводных аппаратов и методам создания системы динамического позиционирования, включающих в себя методы синтеза наблюдателя, регулятора и методы распределения управляющих воздействий на движительно-рулевой комплекс необитаемых подводных аппаратов. Выявлено, что в существующих системах динамического позиционирования для формирования обратной связи по положению и скорости необитаемых подводных аппаратов преимущественно используются дорогостоящие гидроакустические навигационные системы и доплеровские измерители скорости. Не все необитаемые подводные аппараты малого класса бюджетного сегмента оснащаются такими системами, тогда как видеосистемы и инерциальные датчики присутствуют практически в каждом аппарате. С развитием бортовых вычислительных средств становится возможным использовать алгоритмы визуальной одометрии для навигации необитаемых подводных аппаратов по данным с видеосистемы в качестве альтернативы гидроакустической навигации в задаче динамического позиционирования. Предложена концепция архитектуры системы динамического позиционирования необитаемых подводных аппаратов малого класса на основе визуальной одометрии, которая способствует уменьшению стоимости навигационного оборудования и позволяет повысить производительность подводно-технических работ.

The article is devoted to the actual problem of underwater robotics - the problem of dynamic positioning of unmanned underwater vehicles of small class. Particular attention is paid to the methods of navigation of unmanned underwater vehicles and methods for creating a dynamic positioning system, including methods for the synthesis of an observer, a regulator and methods for distributing control actions on the propulsion and steering complex of unmanned underwater vehicles. It is revealed that in the existing dynamic positioning systems, expensive hydro acoustic navigation systems and Doppler speed meters are mainly used to generate feedback on the position and speed of unmanned underwater vehicles. Not all unmanned submersibles of the small class of the budget segment are equipped with such systems, while video systems and inertial sensors are present in almost every device. With the development of onboard computing facilities, it becomes possible to use visual odometry algorithms for navigation of unmanned underwater vehicles based on data from a video system as an alternative to hydro acoustic navigation in the task of dynamic positioning. The concept of architecture of the system of dynamic positioning of unmanned underwater vehicles of small class based on visual odometry is proposed, which helps to reduce the cost of navigation equipment and allows to increase the productivity of underwater technical work.
مدى التزام مكاتب تدقيق الحسابات الفلسطينية بمتطلبات المعيار الدولي لإدارة الجودة 1 ISQM
Authors: سياج اعتدال روبين
Published: October 2024

هدفت هذه الدراسة  إلى التعرف على مدى التزام مكاتب تدقيق الحسابات في فلسطين بعناصر إدارة الجودة الواردة في المعيار الدولي لإدارة الجودة ISQM1، بالإضافة إلى تحديد الفروق في التزام مكاتب تدقيق الحسابات في فلسطين بعناصر إدارة الجودة الواردة في المعيار الدولي لإدارة الجودة ISQM1 تبعاً للمتغيرات الديموغرافية، ولتحقيق هذه الأهداف اتبع الباحث المنهج الوصفي التحليلي، وتكون مجتمع الدراسة من (260) مكتب تدقيق الحسابات حسب(دليل مدقق الحسابات الفلسطيني 2024)، وتم أخذ منهم عينة عشوائية تمثلت ب (63) مكتب، وتم استخدام الاستبانة كأداة لجمع المعلومات، ومن أهم النتائج التي توصلت اليها الدراسة أن هناك التزام مرتفع من قبل مكاتب تدقيق الحسابات في فلسطين بعناصر إدارة الجودة الواردة في المعيار الدولي لإدارة الجودة ISQM1، بالإضافة إلى ذلك فانه لا توجد فروق ذات دلالة احصائية في التزام مكاتب تدقيق الحسابات في فلسطين بعناصر إدارة الجودة تبعاً للمتغيرات الديموغرافية، ومن أهم التوصيات التي توصي بها الدراسة زيادة اهتمام الأطراف الأخرى بفهم والوفاء بالمتطلبات المسلكية ذات الصلة التي يخضع لها مكتب التدقيق، بالإضافة إلى ضرورة قيام مكتب التدقيق بالتقصي عن الارتباطات المكتملة، وأهمية تقويم نظام إدارة الجودة سنوياً على الأقل.
أثر الإبداع الإداري في ترسيخ الثقافة التنظيمية من وجهة نظر القيادات في المدارس الأهلية بالعاصمة المقدسة
Authors: تركستاني غالية حبيب الله
Published: October 2024

هدفت الدراسة إلى قياس أثر الإبداع الإداري على ترسيخ الثقافة التنظيمية في المدارس الأهلية، من وجهة نظر الموظفين والقادة في المدارس الأهلية بالعاصمة المقدسة. واستخدمت الدراسة المنهج الوصفي التحليلي، وتمثلت الأداة في الاستبانة؛ تم توزيعها على عينة طبقية بلغت (87) من قادة المدارس والإداريين بالمدارس الأهلية بالعاصمة المقدسة، وتوصلت الدراسة إلى أن الإبداع الإداري حصل على متوسط كلي (3.94 من 5)، وعلى مستوى أبعاده الأربعة؛ حصل تشجيع الإبداع على أعلى متوسط (4.06) ثم الأصالة (3.96) وثالثا المرونة (3.93) وأخيرا حساسية المشكلات (3.79) وجميعها بتقدير (كبيرة)؛ فيما حصل محور الثقافة التنظيمية على متوسط كلي (3.77  من5)، وجاءت الأبعاد مرتبة كالآتي (الطقوس،3.94؛ القيم، 3.87؛ المعايير، 3.85 (وجميعها بتقدير (كبيرة)، وأخيرا الاتصالات بمتوسط (3.40) وتقدير (متوسطة)، وحصل محور القيادة الإدارية على متوسط كلي (3.25 من 5) وتقدير (متوسط )، كما بينت النتائج وجود أثر إيجابي للإبداع الإداري على ترسيخ الثقافة التنظيمية في المدارس الأهلية بالعاصمة المقدسة، بلغ (3.94)، وأن هناك أثرا إيجابيا للقيادة الإدارية على الثقافة التنظيمية, وكذلك  هناك فروقا ذات دلالة إحصائية بين متوسطات استجابات عينة الدراسة عند مستوى (α≤0.05) حول أثر الإبداع الإداري على الثقافة التنظيمية في المدارس الأهلية تعزى إلى متغيرات (الجنس؛ لصالح الإناث  - العمر لصالح (41_50)سنة - المؤهل لصالح الجامعي  - المسمى الوظيفي لصالح الإداري - سنوات الخبرة لصالح 10 سنوات فأكثر )، بناء على النتائج أوصت الباحثة بضرورة تكوين قنوات اتصال مفتوحة، لتقبل أكبر للآراء الجديدة، وضرورة وجود إدارة خاصة مهتمة بالعمليات الإبداعية ومشاركة المهمات، وتأسيس نادي يجمع إدارات المدارس الأهلية. إضافة إلى مقترحات بدراسات مكملة في الموضوع.
Mutual Interactions of Silymarin and Colon Microbiota in Healthy Young and Healthy Elder Subjects
Authors: Tomisova Katerina , Jarosova Veronika , Marsik Petr , Mascellani Bergo Anna , Cinek Ondrej , Hlinakova Lucie , Kloucek Pavel , Janousek Vaclav , Valentová Kateřina , Havlik Jaroslav
Published: October 2024

Scope This multi-omic study investigates the bidirectional interactions between gut microbiota and silymarin metabolism, highlighting the differential effects across various age groups. Silymarin, the extract from Silybum marianum (milk thistle), is commonly used for its hepatoprotective effects. Methods and results An in vitro fermentation colon model was used with microbiota from 20 stool samples obtained from healthy donors divided into two age groups. A combination of three analytical advanced techniques namely next-generation sequencing, 1H-NMR and LC-MS was used to determine silymarin microbial metabolites over 24 h, overall metabolome and microbiota composition. Silymarin at a low diet-relevant dose of 50 µg/mL significantly altered gut microbiota metabolism, reducing short-chain fatty acid (acetate, butyrate, propionate) production, glucose utilization, and increasing alpha-diversity. Notably, the study revealed age-related differences in silymarin catabolism. Healthy elderly donors (70–80 years) exhibited a significant increase in a specific catabolite associated with Oscillibacter sp., whereas healthy young donors (12–45 years) showed a faster breakdown of silymarin components, particularly isosilybin B, which was associated with higher abundance of Faecalibacterium and Erysipelotrichaceae UCG-003. Conclusion This study provides insights into microbiome functionality in metabolizing dietary flavonolignans, highlighting implications for age-specific nutritional strategies and advancing our understanding of dietary (poly)phenol metabolism.
Helical dinuclear 3d metal complexes with bis(bidentate) [S,N] ligands: synthesis, structural and computational studies
Authors: Allen Jamie , Saßmannshausen Jörg , Singh Kuldip , Kilpatrick Alexander F. R.
Published: October 2024

A diprotic bis(β-thioketoimine) ligand precursor featuring a flexible 4,4’-methylbis(aniline) linker, H22, was synthesised via treatment of the corresponding bis(β-ketoimine) with Lawesson’s reagent. Lithiation of H22 and coordination with one equivalent of d-block metal(II) chlorides MCl2(THF)x (M = Fe, Co and Zn) yielded a corresponding series of homoleptic dinuclear complexes, [M2(μ-2)2]. X-ray diffraction analysis reveals a tetrahedral geometry for the two metals and a double-stranded helicate structure arising from inter-strand face-face π-stacking. These interactions create a helical ‘twist’ of ca. 70°. Utilising a bulky mononucleating β-thioketoiminate ligand, [3]–, the analogous series of heteroleptic monometallic complexes, [M(3)2] (M = Fe, Co and Zn), were prepared and characterised by spectroscopic and analytical techniques. To the best of our knowledge, these are the first complexes of Fe, Co and Zn supported by a bidentate β-thioketoiminate ligand to be structurally characterised by X-ray diffraction. A comprehensive DFT study of all complexes reveals a stronger M–S bonding compared to M–N due to a higher degree of covalency. Solution magnetic studies and Natural Bonding Orbital calculations on the mono- and dinuclear iron and cobalt complexes are consistent with high-spin tetrahedral Fe(II) and Co(II) centres, and cyclic voltammetry reveals both oxidation and reduction processes are accessible.
Legion: A Platform for Gaussian Wavepacket Nonadiabatic Dynamics
Authors: Souza Mattos Rafael , Mukherjee Saikat , Barbatti Mario
Published: October 2024

Nonadiabatic molecular dynamics is crucial in investigating the time evolution of excited states in molecular systems. Among the various methods for performing such dynamics, those employing frozen Gaussian wavepacket propagation, particularly the multiple spawning approach, offer a favorable balance between computational cost and reliability. It propagates on-the-fly trajectories used to build and propagate the nuclear wavepacket. Despite its potential, there is a lack of efficient, flexible, and easily accessible Gaussian wavepacket propagation software. To address this, we present Legion, a software that facilitates the development and application of classical-trajectory- guided quantum wavepacket methods. The version presented here already contains a highly flexible and fully functional ab initio multiple spawning implementation, with different strategies to improve efficiency. Legion is written in Python for data management and Numpy/Fortran for numerical operations. It is created under the umbrella of the Newton-X platform and inherits all of its electronic structure interfaces beyond other direct interfaces. It also contains new approximations that allow it to circumvent the computation of the nonadiabatic coupling, extending the electronic structure methods that can be used for multiple spawning dynamics. We test, validate, and demonstrate Legion’s functionalities through multiple spawning dynamics of fulvene (CASSCF and CASPT2) and DMABN (TDDFT).