bluuebunny/crossref_metadata_2025_split huggingface dataset:
Research Regarding the Properties and Combustion Performance of a Thermal Decoy Pyrotechnic Composition
Authors: Iorga Ovidiu , Epure Cristiana , Marin Alexandru , Moşteanu Dănuț-Eugeniu 
Published: July 2022

Abstract
The present research focuses on the characterisation of a new formulation for thermal decoy pyrotechnic composition, as an alternative to magnesium-teflon-viton (MTV) formulations. The oxidant used in the composition is potassium perchlorate, given its good thermal stability and high percentage of available oxygen. The fuel of choice is magnalium (alloy of Al-Mg 50-50 % wt.), as an higher energy alternative to magnesium. The binder used in the composition is a blend of solvent free polyurethane and a chlorinated rubber. The main advantages of this composition are related to the high thermal stability, the ease of processing, by squeeze casting method and its good combustion performance (temperature and burn rate profile). The use of chlorinated rubber in the composition is beneficial, as a sensible increase in the burn rate and combustion temperature is observed. The morphological properties and chemical composition of the material is evidenced by SEM-EDS analysis while the burn rate and combustion temperature is recorded with a high speed thermal camera. The combustion heat and specific volume is calculated with a dedicated thermochemical code while the results are validated in experimental determinations. The presented formulation can represent a more safe and cost effective material to be used in thermal countermeasure ammunitions.
Web Solutions for Remote Control and Visualization of the Electromagnetic Spectrum Provided By Sensors Based on SDR
Authors: Șorecău Mirela , Șorecău Emil , Sârbu Annamaria , Bechet Paul 
Published: July 2022

Abstract
In this article, we present the implementation of a Software Defined Radio (SDR) remote sensor management solution for electromagnetic spectrum monitoring using web interfaces. The proposed sensor is developed on an SDR platform - USRP-2932 with LTE standard specific signal monitoring capabilities. Two solutions have been implemented for remote control and visualization of the sensor parameters: by using VNC (Virtual Network Computing) software for full remote access and by implementing in GNU Radio the Bokeh python library, which allows visualization of graphs and charts directly through a web GUI. For accessing the sensor via the backbone network of an Internet Service Provider (ISP), in both cases a Virtual Private Network (VPN) was set up using the Point-to-Point Tunnelling Protocol (PPTP) solution.
Design, Implementation and Preliminary Testing of a Virtual Reality System Used to Train Military Personnel on a Simulated Battlefield
Authors: Vesa Claudiu , Șorecău Emil , Șorecău Mirela , Vesa Teodora Adriana 
Published: July 2022

Abstract
In this article, we present the design, implementation, and testing of a virtual reality-based training solution for military personnel. The aim of using virtual reality instead of traditional training processes is to simulate battlefield conditions as realistically as possible and to save financial resources that could be directed to other educational processes. The system was implemented using the Virtual Battlespace 4 (VBS4) virtual simulation software application, interconnected with Virtual Reality Headset and Controllers, to provide an enhanced simulation training experience. A wireless network has also been set up and tested for increased flexibility and quick setup during multiplayer simulation.
Considerations Regarding Theories of Modern Learning and Special Intelligent Technologies in Higher Education
Authors: Vladu Mircea , Popescu Stelian 
Published: July 2022

Abstract
The emergence and evolution of modern learning theories and artificial intelligence technologies have left their mark on education of all levels, but also on other areas of activity, thus facilitating the work of people able to operate with them. Speaking especially of the field of higher education, we can appreciate that this field has been “invaded” by intelligent technologies, generating an increase in the offer of courses, a higher number of students and “recognizing distance learning as an educational model ˮ. We shall further present some of the theories of modern learning, as well as the role of smart technologies recommended for use in modern education.
Effect of hypertension on microcirculatory disorders in patients with rheumatoid arthritis
Authors: Shimanski D. A. , Nesterovich I. I. , Inamova O. V. , Lapin S. V. , Kholopova I. V. , Blinova T. V. , Mazing A. V. , Galkina O. V. , Anpilova A. O. , Trophimov V. I. , Vlasov T. D. 
Published: July 2022

Introduction. The presence of endothelial dysfunction contributes to the progression of rheumatoid arthritis (RA) and the development of cardiovascular diseases. However, microcirculatory signs in the combination of RA with hypertension have not been studied enough.Objective – to clarify the contribution of concomitant hypertension in the formation of microcirculatory disorders in patients with RA.Materials and methods. The observational study involved 123 patients of both sexes from 18 to 72 years old (103 – the study group with verified RA, 23 – the control group, representing relatively healthy volunteers). Hypertension occurred in 55.3 % of patients. Laser Doppler flowmetry was performed to assess vasomotor function. Both the initial perfusion parameters were studied with the calculation of the amplitude-frequency spectrum, as well as an occlusive test and a test with acetylcholine iontophoresis. Initial perfusion parameters were studied with time– frequency analysis, an arterial occlusion test and an acetylcholine iontophoresis test were performed.Results. Patients with concomitant hypertension against the background of RA had a more pronounced decrease in the amplitudes of the endothelial (p=0.036) and neurogenic (NC) (p=0.005) components of the spectrum, an increase in respiratory modulation (RM) (p=0.002), as well as a decrease in the reserve of capillary blood flow (p=0.010) and shortened time to perfusion half-restoration (p=0.042) in the occlusion test. However, there were no significant differences between the groups in terms of the acetylcholine iontophoresis test (p≥0.05). The relationship between the RM amplitude and cardiovascular risk (CVR) was established according to the SCORE (ρ=0.269; p=0.022), as well as with systolic (ρ=0.324; p=0.005) and diastolic (ρ=0.234; p=0.045) blood pressure was established. An assessment of the RM amplitude predicted the presence of concomitant hypertension with a sensitivity of 72.5 % and a specificity of 75 % (p=0.001).Conclusion. The presence of concomitant hypertension against the background of RA was associated with more pronounced vasomotor dysfunction, as well as with the presence of venular hypertension (VH), which is the pathogenetic link of hypertension. At the same time, an increase in the amplitude of the RM, which reflects VH, allows it to be used as an early additional prognostic marker for the presence of concomitant hypertension and increased CVR in patients with RA.
The nNOS and NeuN expression aspects in the cerebral cortex of rats with different cognitive abilities in cerebral hypoperfusion with short-term physical exercise
Authors: Сhrishtop V. V. , Rumyantseva T. A. , Nikonorova V. G. , Pozhilov D. A. 
Published: July 2022

Introduction. Physical activity is often used in rehabilitation to restore cognitive function after cerebral blood flow impairment and typological features like baseline cognitive ability may alter their effectiveness.The aim was to evaluate the expression of nNOS and NeuN in the large hemisphere cortex in the cerebral hypoperfusion occurrence in rats having different scores in the Morris maze.Materials and methods. Cerebral hypoperfusion was simulated by bilateral ligation of the common carotid arteries. Before surgery, Wistar rats were divided into equal subgroups with high (HCA) and low levels of cognitive ability (LCA) according to the results of Morris maze testing. Animals were removed from the experiment at 8, 21, 35, 60, and 90 days after surgery, a total of 184 rats, 24 formed the control group and 80 formed the cerebral hypoperfusion subgroup with 80 animals undergoing short-term swimming daily starting on day 7 of the experiment.Results. We revealed the earlier changes in HCA animals (8th day of the experiment) induced by cerebral hypoperfusion accompanied by a more intense nNOS-positive neurons density reduction to 47 % of control values, the length of their processes, and an increase in pericarion area. In LCA the decrease of density was only 75 % of control values and pericarion area does not differ from control values. At later periods on the 60 and 90 days of the experiment LCA demonstrates the preservation of the neurons density and greater length of their processes (67 % of the control subgroup values).Conclusion. HCA is a risk factor for damage of nNOS-positive neurons in cerebral hypoperfusion. Physical exercise more effectively decreases nNOS expression in animals with HCA, which may be one of the sanogenetic mechanisms of this factor.
Rats caudal vena cava hemodynamics features in different age periods
Authors: Andreeva A. I. , Telia V. D. , Ustarova M. G. 
Published: July 2022

Introduction. Liver hemodynamics age-related features studying is promising area of portal and caudal vena cava and hepsatic artery of rats hemodynamics exploration.Aim was to determine qualitative and quantitative hemodynamic paremeters of the laboratory rats caudal vena cava of different genders and ages.Materials and methods. The study was conducted on 60 mongrel rats (males and females, 120–170 g) divided into three age groups. The first group included 20 rats aged 1 month, the second – 20 rats aged 6–12 months and the third – 20 rats aged more than 18–24 months. The study of caudal vena cava qualitative and quantitative hemodynamic parameters was performed by ultrasound scanners. Animals were anaesthesized by zoletil-xylazine. Digital data were processed by methods of variational statistics.Results. All animals showed the antegrade caudal vena cava blood flow. The spectrum of blood flow differed in the number, shape of teeth and phase. The most animals showed three-phase spectrum not depend on the animals gender and age. The diameter of the vein did not depend on the gender. In the I and II age groups, the predominance of the volumetric blood flow rate in the CPV in males compared with females was within 10 % (R=0.98 and R=0.37, respectively), in the III age group, the relationship was not statistically significant (R=–0.03). The diameter and maximum systolic blood flow velocity in the caudal vena cava increased slightly (within 3 %) with the age of the animals (R=0.64 and R=0.43, respectively). Volumetric blood flow rate decreased within 4 % with increasing age (R=0.42).Conclusion. The spectrum of rats caudal vena cava blood flow differed in the number, shape of waves and phase. In most animals it was three-phase. In all animals the direction of blood flow was antegrade. The phase of the spectrum was not affected by the animals gender and age. There was no statistically significant dependence of the diameter and linear velocity of blood flow on the gender. The volumetric blood flow rate was slightly higher in males (within 10 %) compared to females. The diameter and the maximum systolic blood flow velocity increased slightly (within 3 %) with the age of the animals. The indicator of the volumetric blood flow rate decreased within 4 % with increasing age.
Atypical case of ischemic mitral regurgitation: pathogenetically based treatment
Authors: Krylov V. V. 
Published: July 2022

Introduction. The evolution of the study of mitral valve ischemic dysfunction influenced by fundamental and experimental research in recent years has led to a change of mitral leaflets role as a static component of the mitral valve in the pathogenesis of ischemic mitral regurgitation especially in the chronic myocardial ischemia.Objective. We report the clinical case of acute ischemic mitral regurgitation as a result of a chord rupture of the PML in a patient with unspecified duration of coronary artery disease without acute coronary syndrome and previous myocardial infarction including all stages of the diagnostic search and the results of surgical treatment.Conclusion. While performing reconstructive correction of the ischemic mitral regurgitation the possibility of reverse remodeling of the leaflets should be considered in case of removal the myocardial ischemia triggering factor. And therefore it is necessary to perform a full and adequate myocardial revascularization that combined with a full correction of all morphofunctional mitral valve changes guarantees the freedom from residual and recurrent mitral regurgitation.
PENCEGAHAN ALIH FUNGSI LAHAN SERTA PENATAAN RUANG DALAM RANGKA MEWUJUDKAN PEMBANGUNAN BERKELANJUTAN
Authors: Anita Anita , Rusfandi Rusfandi , Triasavira Meidy 
Published: July 2022

Sinergitas antara komponen lingkungan hidup; masyarakat dan pengelola lingkungan dalam penataan ruang diharapkan dapat mewujudkan tujuan pembangunan Indonesia dalam meningkatkan kesejahteraan masyarakat. Namun yang terjadi masih menunjukkan rendahnya pemahaman pentingnya pengelolaan sumber daya dan lingkungan hidup secara berkesinambungan, terjadinya peningkatan pelanggaran penataan ruang, dan lemahnya penegakan hukum terhadap penataan ruang. Penulisan ini bertujuan untuk mengetahui pencegahan alih fungsi lahan serta penataan ruang dalam rangka mewujudkan pembangunan berkelanjutan dan solusi yang dilakukan dalam rangka penegakan hukum penataan ruang dalam rangka mewujudkan pembangunan berkelanjutan. Hasil penelitian menunjukkan bahwa pentingnya mewujudkan pembangunan berkelanjutan yang dapat tetap produktif untuk generasi yang akan datang, guna untuk pemeliharaan dan peningkatan kualitas hidup. Serta tidak kalah penting, peranan dinas terkait untuk memantau dan menganalisa kondisi lahan yang terbengkalai di wilayah Sumenep, sebagai masukan yang sangat berharga bagi pemerintah daerah Sumenep dalam penyusunan dan revisi Rencana Tata Ruang Wilayah yang memberikan prioritas tanah pertanian.
Diplomacia de defensa: herramienta para la resolución de conflictos
Authors: Vargas-Villamizar Carlos Enrique 
Published: July 2022

Varios autores se han aventurado a dar definiciones de diplomacia de defensa; sin embargo, este término no cuenta con un consenso lo suficientemente consolidado para ofrecer una definición unificada. No obstante, la diplomacia de defensa ha probado fortalecer las acciones de la diplomacia multilateral y bilateral de las naciones con objetivos tendientes a garantizar la resolución pacífica de conflictos. Dicho esto, se puede entender la diplomacia militar como una herramienta fundamental, necesaria y práctica, dadas sus particularidades, evidenciadas, a su vez, en su desarrollo y su estructuración dentro de la política exterior de los Estados. A partir del análisis de caso del rompimiento de relaciones diplomáticas entre Colombia y Ecuador, en 2008, se va a demostrar la pertinencia de la diplomacia ejercida por las instituciones de defensa para mantener el flujo de información y garantizar la resolución pacífica de conflictos.
El artículo pretende señalar la validez y la vigencia de la diplomacia de defensa como herramienta efectiva dentro de la práctica de la política exterior de los Estados abordando, de forma tangencial, la evolución historiográfica del concepto y su aplicación en diversos eventos de las relaciones internacionales. En conclusión, es observable el actuar de la diplomacia de defensa en el diario relacionamiento de naciones aliadas, en eventos de crisis o como muestra del estrecho nivel de confianza entre países, lo cual llega a establecer mecanismos insolubles e inamovibles que resultan estratégicos en los momentos de mayor tensión para garantizar la máxima internacional de la paz.
La cibergeopolítica de China: un interés estratégico de Estado
Authors: Vargas-Chaparro Nixon Edier 
Published: July 2022

El crecimiento exponencial de Beijing en el sistema económico está condicionando al escenario internacional de las próximas décadas; una situación en que las dinámicas del cambio climático y los avances en materia de tecnología definirán el contexto global del siglo XXI. Así las cosas, para Xi Jinping se vuelve un imperativo el desarrollo tecnológico; en especial, el dominio del ciberespacio. En términos generales, dentro su visión a largo plazo se encuentra ser la economía líder en el sistema internacional, definida por la política exterior del Partido Comunista Chino (PCCh).
Dicho esto, se presenta la pregunta: ¿Cuál sería la estrategia de China en el ciberespacio, entendiendo que este es un factor determinante en el futuro del orden mundial? Para buscar aproximarnos a la correspondiente respuesta, se desarrolló una investigación exploratoria con un enfoque cualitativo. De igual forma, se apeló a la teoría del poder ciberespacial, de Nye (2010), y a los componentes del ciberespacio (físico y virtual) planteados por Pătrașcu (2019), sumado ello a una revisión documental.
Se logró evidenciar que hay una serie de tareas que lleva a cabo el PCCh, en el marco de un probable plan estratégico, o una línea de acción, que busca desplazar a Estados Unidos de su liderazgo mundial económico y otros ámbitos, como el militar, el cultural, el ambiental, el espacial y, desde luego, el ciberespacial, donde tendrá una gran ventaja si materializa sus planes.
Identifikasi Komoditas Tanaman Pangan Unggulan di Kabupaten Indramayu Melalui Analisis LQ (Location Quotient)
Authors: Hamdani Kiki Kusyaeri , Susanto Bambang 
Published: July 2022

Komoditas unggulan (basis) memiliki keunggulan komparatif dan kompetitif terhadap komoditas sejenis di suatu wilayah. Kabupaten Indramayu memiliki beberapa komoditas pangan unggulan yang berpotensi besar untuk dikembangkan karena didukung oleh sumberdaya lahan pertaniannya. Tujuan dari penelitian ini adalah mengidentifikasi komoditas unggulan berbasis pangan di Kabupaten Indramayu melalui metode LQ. Penelitian dilakukan di Kabupaten Indramayu pada bulan Februari-Maret 2020. Penentuan lokasi penelitian ditentukan secara purposive. Data yang dikumpulkan merupakan data sekunder yang diperoleh dari Dinas Pertanian Kabupaten Indramayu meliputi data time series luas panen dan produksi tanaman pangan di Kabupaten Indramayu selama kurun waktu lima tahun (2015-2019). Hasil penelitian menunjukkan bahwa sebaran komoditas pangan unggulan paling banyak di Kabupaten Indramayu adalah padi. Kecamatan Kroya dan Terisi memiliki komoditas pangan unggulan paling banyak yaitu jagung, kedelai, kacang tanah, ubi kayu, dan ubi jalar. Komoditas kacang hijau di Kecamatan Kedokan Bunder memiliki nilai LQ>1 paling tinggi diantara semua tanaman pangan. Hasil penelitian ini bisa menjadi bahan informasi tentang potensi pengembangan komoditas pangan ke depan di Kabupaten Indramayu.

Kata Kunci : Basis, komparatif, kompetitif, Indramayu, padi
Prevalence of obstructive sleep apnoea among patients admitted with acute coronary syndrome in a hill state of northern India
Authors: MAHAJAN SANYAM K. , VERMA BALBIR S. , SHARMA SUNIL , MAHAJAN KUNAL , SINGH BALRAJ 
Published: July 2022

Background
Obstructive sleep apnoea (OSA) is one of the emerging non-traditional cardiovascular risk factors. Studying OSA may contribute towards a better understanding of current concepts of atherogenesis and in guiding therapy.

Methods
We conducted this cross-sectional study among 66 patients with acute coronary syndrome (ACS) in a tertiary care hospital from 1 January 2019 to 30 June 2020. We included patients of ST elevation myocardial infarction (STEMI)/ non-STEMI (on achieving Killip class I/II) and unstable angina and performed in-hospital overnight polysomnography (PSG) within 8 weeks of index event. Apnoea–hypoapnoea index (AHI) value 5–<15 was defined as mild OSA, AHI 15–<30 as moderate OSA and AHI >30 as severe OSA. We analysed data using Epi Info version 7.2.4 for Windows.

Results
The 66 patients had a mean (SD) age of 57.7 (11.1) years and 54 (81.8%) were men. Forty-three (65.1%) patients had STEMI, 19 (28.7%) had non-STEMI and 4 (6%) had unstable angina. On PSG, the prevalence of OSA (AHI>5) was 78.8% (95% CI 67.0–87.9). Of these, AHI >15 was significantly associated with diabetes, hypertension and different measures of obesity (p<0.05).

Conclusions
This study, conducted in a hill state of northern India, showed a high prevalence of OSA in patients with ACS. Obesity, diabetes mellitus and hypertension were significantly associated with severity of OSA (AHI>15).
Post-validation item analysis to assess the validity and reliability of multiple-choice questions at a medical college with an innovative curriculum
Authors: YAHIA AMAR IBRAHIM OMER 
Published: July 2022

BackgroundIn medical education, the need to obtain reliable and valid assessments is critical for the learning process. This study implemented a post-validation item analysis to create a supply of valid questions for incorporation into the question bank.MethodsA cross-sectional study was performed in the College of Medicine, University of Bisha, Saudi Arabia. The study was targeting 250 items and 750 distractors from 2017 to 2020. The post-validation item analysis was done to evaluate the quality of the items using test-scoring and reporting software. Data were analysed by SPSS Version 25. Quantitative variables were expressed as mean (SD), while qualitative variables were expressed as number and percentage. An independentt-test was done to reveal the association between the item analysis parameters. A value of p<0.05 was considered statistically significant.ResultsThe mean difficulty index (DIF I), discrimination index (DI) and distractors efficacy (DE) were 73.8, 0.26 and 73.5%, respectively. Of 250 items, 38.8% had an acceptable DIF I (30%–70%) and 66.4% had ‘good to excellent’ DI (>0.2). Of 750 distractors, 33.6%, 37%, 20% and 9.2% had zero, one, two and three non-functional distractors, respectively. The mean Kuder–Richardson was 0.76. The DIF I was significantly associated with DE (p=0.048). The post-validation item analysis of this study showed that a considerable proportion of questions had acceptable parameters and were recommended for item banking. However, some questions needed to be rephrased and reassessed or discarded.ConclusionThree-option multiple-choice questions should be considered for future examinations to improve the assessment process.
Micropropagation d’Atropa belladonna et de Mandragora officinarum : évaluation du développement sur différents milieux de culture et analyse de quelques marqueurs biologiques
Authors: GALLOIS Alexandre , DULAURENT Sylvain , MORICHON Julien , SAINT-MARCOUX Franck , LABROUSSE Pascal 
Published: July 2022

La belladone et la mandragore ont été cultivées in vitro, sur le milieu de MS dans un premier temps avec douze équilibres de régulateurs hormonaux (6-benzyl aminopurine et acide 1-naphtalène acétique). Quelques marqueurs biologiques ont été dosés ; il s'agit des chlorophylles a, b et des caroténoïdes, des protéines totales, du potentiel osmotique et des alcaloïdes tropaniques (atropine et scopolamine). La deuxième phase de culture a consisté à cultiver la belladone sur les milieux 0/0 et 7,5/5 (BAP/ANA) et la mandragore sur le milieu de Murashige et Skoog (0,11 µM/0,89 µM). Lors de cette deuxième phase, les protéines, le potentiel osmotique et les alcaloïdes tropaniques ont été dosés dans la belladone. Dans la mandragore, seules l'atropine et la scopolamine ont été recherchées puisque, quel que soit l'équilibre en phytohormones, les cals ne se sont jamais différenciés. Les résultats obtenus, en CL-SM/SM, ont montré que chez la belladone, le milieu sans hormone était celui qui permettait d'obtenir les plus fortes concentrations en atropine et en scopolamine. Toutefois, ces valeurs restent bien inférieures à celles trouvées dans la littérature. La mandragore, quant à elle, n'a pratiquement pas produit de métabolites secondaires.