bluuebunny/crossref_metadata_2025 huggingface dataset:
The Universal Culture of COVID-19 as Provoked by the War Against COVID-19 Metaphor
Authors: Almirabi Maisarah M.
Published: September 2024

Previous studies tackling the subject of the COVID-19 pandemic found that most of the metaphors used in different genres on the subject are related to war. These war metaphors have been found to have the effects of raising awareness and creating a sense of urgency about the situation, therefore gaining support, bringing calm and stability, and promoting some emotional interaction. This study focused on the Arabic metaphors used during the different stages of the COVID-19 pandemic, i.e., from the time the pandemic began to emerge to the time of lockdown and curfew to the invention of the vaccine and of the suggestion of taking multiple doses. Data were collected from Twitter using its advanced search engine. The importance of this study lies in the fact that previous studies tackling the topic have not focused on metaphors using such a diachronic approach. Furthermore, the causes and effects of using COVID-19 metaphors in previous studies were found to be similar to the ones in this study. The resulting metaphors reflected some of the diachronic changes brought on by the COVID-19 global situation. These results are indicative of the match between the global situation invoked by the pandemic and the conceptualization of this situation as realized in language regardless of which language this is or to what culture it belongs.
Buffering the Effects of Students’ Perceived Task Difficulty on Cognitive Engagement in EFL Writing Classrooms: The Role of Foreign Language Enjoyment and Growth Mindset
Authors: Almutlaq Sana A.
Published: September 2024

Submitted Currently, research on second language acquisition (SLA) and psychology of language learning has conceived foreign language learning as a complex system of beliefs, thoughts, emotions, and actions that contribute immensely to shape students’ learning experiences. The significance of such research lies in the fact that they provide a holistic perspective of FL learning by considering the multiple and interrelated interactions of beliefs, emotional and cognitive factors, rather than examining any single variable in isolation. Therefore, this study seeks to provide such insights by examining the interaction between perception of task difficulty and cognitive engagement in an EFL writing classroom, taking into consideration the possible effects of foreign language enjoyment (FLE) and mindset on such relationship. Data were collected from 218 Saudi undergraduate students using a questionnaire. Results revealed that: a) students’ perception of task difficulty is linked to their cognitive engagement; b) FLE acts as a buffer against the negative effects of difficult EFL writing tasks on students’ cognitive engagement; c) growth mindset has no moderating role in the relationship between perceived difficulty and cognitive engagement.
A Cognitive Model of Language Teacher Fossilization
Authors: Toloczko Ewa
Published: September 2024

Expertise in foreign language teaching has been widely discussed in the literature as inherently related to accumulated classroom experience and, hence, extensive practical knowledge. Even though current conceptualizations are increasingly focusing on teachers’ ability to reflect on their performance and continuously develop a repertoire of didactic resources regardless of their career stage, effective human information processing in the profession remains under-researched. This paper sees the concept of expertise from the perspective of cognitive processes, and specifically operations involved in problem-solving. The author presents a theoretical model of teacher fossilization, discussing attention, knowledge, reasoning, and judgment as potential inhibitors of intellectual vitality and growth in individuals. When neglected, these factors might lead experienced teachers to make just as incompetent decisions as novice educators. The model highlights the external and internal forces that cause practitioners to minimize, rather than maximize, their learning opportunities in a workplace. The new concept has implications for teachers’ day-to-day practice as well as for in-service professional development initiatives. It serves as a guiding principle for the successful utilization of one’s cognitive capital and outlines both the purpose and direction of one’s mental effort.
Visual Representation of Selected Malaysian Political Trolling on Social Media: Disclose the Ideology and Power
Authors: Rahman Nurulhasanah Abdul , Sazan Darwalis , Yusoff Md Zahril Nizam Md , Zaini Muhamad Fadzllah Hj. , Razzaq Nasir
Published: September 2024

The visual variety involving internet political trolling in Malaysia also adds to and impacts the audience's awareness of this resource. The existence of internet trolling encourages the audience's openness to give diverse responses and perceptions in politics in Malaysia. Thus, these responses and views will have a big impact on anything that is depicted visually, especially on social media. This study examines the ideology and power behind visual internet trolling on social media. For this purpose, the research methodology applies a qualitative approach based on visual content. Social media such as Twitter is used as the medium and unit of analysis of this study in visual sources. Adaptation of the theory uses Fairclough's (1995) critical discourse analysis and Visual Semiotics Theory by Kress and van Leeuwen (1996) in studying selected visual trolling. By using a combination and adaptation of these theories, visual ideology, and power can be best unraveled. The results of the study found that the visual production of Malaysian politicians' trolling aims to have an impact on the audience's attitude through the ideology and power that is visualized in Malaysian politics. The visual ideological and power construction of trolling also successfully creates an alternative for the audience to express their perceptions and rights, namely the right of expression which underlies to support or criticize Malaysian politics. This study provides knowledge and understanding about the ideology and power behind visual trolling in the Malaysian political context.
Digital Literacy Competence for Scientific Writing: Students' Perceptions and Skills
Authors: Dharmayanti Putu Ayu Paramita , Padmadewi Ni Nyoman , Utami I G A Lokita Purnamika , Suarcaya Putu
Published: September 2024

In this digital era, digital literacy skills must be owned by students to write a good scientific writing. Therefore, this study aims to obtain students' perceptions and skills toward digital literacy in scientific writing. This study was a descriptive study. The data were collected by administering closed-ended questionnaires and conducting semi-structured interviews with the thirty-three students in the seventh semester of the English Language Education Study Program of Teaching Training and Education Faculty of Mahasaraswati University, Denpasar. Data obtained from the questionnaires were analyzed quantitatively, and the data from the interviews were analyzed qualitatively. The result of the study indicated that students had a positive perception of digital literacy and had good digital literacy skills in scientific writing. Students believed having digital literacy skills was essential to help them write good scientific writing. In addition, students have good skills in the digital literacy dimension of critical thinking, finding online information, online writing attitude, and digital function. These skills helped them construct and develop ideas and also avoid plagiarism. However, students' digital literacy skills can be classified as sufficient in the dimensions of online communication, creativity and collaboration, and digital academic culture. Lack of knowledge, competence, and confidence leads students to be less creative and not actively join the online collaboration and digital academic culture.
Correlation of ESP Learners’ Cognitive, Metacognitive Strategies and Academic Achievement
Authors: Khan Ali Ahmed , Sanosi Abdulaziz B.
Published: September 2024

There have been many studies dealing with the interconnections between the utilization of language learning strategies and the overall academic achievement of EFL learners. Our research aims to investigate whether there is some correlation between the implementation of cognitive strategies, metacognitive strategies, and academic achievement in an ESP context. The study sample incorporated 170 undergraduates studying in business administration programs at the university where we are teaching. We used the Strategy Inventory of Language Learning Strategies (SILL) put together by R. Oxford to examine the implementation of CSs and MCSs by the learners. We generated the results with the help of descriptive and inferential statistics. We compared the data received with the students’ GPAs by using the Pearson correlation coefficient. The findings revealed that students make use of both CSs and MCSs fairly highly. MCSs are used more than CSs. There is a remarkably useful correlation between GPA and most of the CSs and MCSs examined. The findings and recommendations of this research will contribute to the ongoing literature and they will help in updating ESP syllabi and teaching techniques of vocational and practical programs that require ESP.
The HVAC system engineering method for a new family of unified cabins of combine harvesters
Authors: Maslensky Viktor V. , Bulygin Yury I. , Pavlikov Alexander V.
Published: September 2024

BACKGROUND: Designing a combine harvester cabin climate system is a complex and multi-stage process that includes solving a set of tasks. To solve them, a design engineer must have knowledge and skills in various fields, starting with thermal engineering calculations and ending with experimental research methods and computer modeling, which requires a large amount of intellectual and time resources. Therefore, the task of creating a unified method of engineering of combine harvester cabin HVAC system is highly relevant.
AIM: Development of the HVAC system for a unified cabin of a grain harvester and a forage harvester. The designed HVAC system is purposed to create a comfortable microclimate in the cabin of the combine for 2 people in summer and winter operating conditions.
METHODS: The methodology of calculation and selection of the combine harvester cabin HVAC system, which includes the development of engineering calculation methods and mathematical modeling of thermodynamic and ventilation processes in the cabin, is considered.
RESULTS: The main parameters were determined: heat intakes and heat losses for the grain harvester and forage harvester cabins, which amounted to 2.8 and 2.2 kW for the grain harvester, 2.9 and 2.35 kW for the forage harvester; the required air flow rate supplied to the cabin to ensure a comfortable temperature — 740 m3/h; the percentage of air recirculation regarding the conditions of absence of fogging and creation of excessive pressure in the cabin — 75%; the cooling and heating capacity of the HVAC system, taking into account the operating conditions of the combine, are 7.8 and 6.3 kW respectively. The selection of the main equipment of the HVAC system for a unified cabin for a new family of unified cabins of combines — the BUHLER 1000 MFWD evaporator-heater and the Valeo TM16 compressor are chosen.
CONCLUSION: The HVAC system designed in accordance with the presented methodology is capable of ensuring a comfortable cabin air temperature in the range of 22–24 °C at various operating modes of the combine harvester in different regions. In addition, the HVAC system parameters eliminate fogging of the cabin windows and the penetration of dusty air inside due to the created excessive pressure.
Opuntia ficus-indica (L.) Mill. Bitkisinden Hazırlanan Farklı Ekstrelerin Antidiyabetik, Antitrozinaz, Antioksidan ve Sitotoksik Etkisinin Araştırılması
Authors: Paşayeva Leyla , Kıcalı Sena , Karaboğa Arslan Ayşe Kübra
Published: September 2024

Türkiye farklı iklim ve ekolojik koşullara sahip olması nedeniyle floranın çok sayıda bitki türü ve çeşidi içermesi bakımından doğadan toplanan ve kültürü yapılan tıbbi bitkiler açısından büyük bir ekonomik potansiyele sahiptir. Çalışmada Opuntia ficus-indica bitkisinin meyve kısmından farklı ekstraksiyon yöntemleriyle elde edilen ekstrelerin antidiyabetik, antitirozinaz, antioksidan ve hücre canlılığı üzerine etkileri incelenmiştir. Bu amaçla meyve kısmı kurutulduktan sonra %70’lik metanol ile maserasyon ve ses dalgaları-destekli sıvı ekstraksiyonu yöntemleriyle hazırlanan ekstrelerin α-amilaz, α-glikozidaz, tirozinaz inhibitör etkileri yanında antioksidan kapasiteleri DPPH ve ABTS yöntemleri ve hücre canlılığı üzerine etkileri ise RL95-2 ve A549 kanser hücrelerinde tayin edilmiştir. Sonuç olarak ekstrelerden ses dalgaları-destekli sıvı ekstraksiyonu yöntemiyle hazırlanan ekstrenin α-amilaz (IC50=395.123±3.477 µg ml-1) ve tirozinaz enzimi üzerinde inhibisyon etkisinin (IC50=551.633±1.159 µg ml-1), ABTS radikal süpürücü aktivitesinin (0.522±0.041 µMTrolox/gekstre) diğer ekstreden daha yüksek olduğu görülmüştür. Ayrıca aynı ekstresinin toplam fenolik medde ve flavonoit miktarının da daha yüksek olduğu belirlenmiştir ((181.189±4.576 mgGAE/gekstre ve 125.635±1.946 mgCA /gekstre ). Ekstrelerin α-glikozidaz, antitirozinaz ve hücre canlılığı üzerine etkileri orta düzeyde bulunmuştur. Bu çalışmanın sonuçları ile özellikle ses dalgaları-destekli sıvı ekstraksiyonu yöntemiyle hazırlanan ekstrenin α-amilaz inhibitör etki ve antioksidan etkisinin hangi bileşiklerden kaynaklandığını ve etki mekanizmalarını belirlemek için daha ileri çalışmalara ihtiyaç duyulmaktadır.
Determination of in vitro Antioxidant, Anticholinergic, and Antiepileptic Activities of some Medicinal and Aromatic Plant Extracts
Authors: Yurt Bayram , Sağlamtaş Rüya , Demir Yeliz , İzol Ebubekir , Diril Halit , Çağlayan Cüneyt
Published: September 2024

Medicinal and aromatic plants such as Crocus cancellatus, Scilla Siberica subsp. armena, Juniperus oxycedrus subsp. oxycedrus and Anthriscus nemorosa have many different biological activities. While antioxidants are significant in preventing many diseases, inhibition of metabolic enzymes is also effective in preventing many diseases. In this study, antioxidant activities of water, ethanol, and dichloromethane extracts of four different medicinal and aromatic plant species were determined by 1,1-diphenyl-2-picrylhydrazyl (DPPH•) and 2,20-azino-bis-3-ethylbenzthiazoline-6-sulphonic acid (ABTS•+) radical scavenging and Cu2+, Fe+3, and Fe3+-2,4,6-tris(2-pyridyl)-S-triazine (TPTZ) reducing assays. Enzyme inhibition studies were performed with metabolic enzymes acetylcholinesterase, butyrylcholinesterase, carbonic anhydrase I and II isoenzymes. The ethanol extract of A. nemorosa showed the highest activity in DPPH and ABTS assays (IC50: 17.36 µg mL-1, IC50: 7.02 µg mL-1). In the Fe3+ reducing assay, the dichloromethane extract of A. nemorosa showed the highest activity (1.96±0.060 µg mL-1). In the Cu2+ reducing assay, the dichloromethane extract of J. oxycedrus showed the highest activity (1.773±0.066 µg mL-1). In the Fe3+-TPTZ reducing assay, the ethanol extract of S. siberica showed the highest activity (1.256±0.011 µg mL-1). In the enzyme inhibition results, it was determined that all plants and all extracts inhibited the enzymes studied. As a result of this study, it was determined that these four medicinal and aromatic plants have high biological activities.
Siyah Alaca Sığırlarda Pik Süt Verimine Bazı Çevre Faktörlerin Etkisi
Authors: Tüzemen Naci , Tankal Mustafa
Published: September 2024

Bu araştırma, Gökkale Tarım İşletmesinde yetiştirilen Siyah Alaca sığırlarda pik süt verimine pike ulaşma süresi, laktasyon sırası, buzağılama mevsimi, buzağılama yılı, servis periyodu ve kuruda kalma süresi gibi bazı çevre faktörlerin etkisini tespit etmek amacıyla yapılmıştır. Yüksek süt verimi ve bunun sürdürülebilir olması sığırlarda çevre faktörlerinin pik süt verimi üzerine etkisinin incelenmesi, ayrıca ileri dönemler için yapılacak seleksiyon, planlama ve işletmede yapılan yetiştiricilik uygulamaları için çok önemlidir. Sığır yetiştiriciliğinde kontrol edilebilen çevre faktörleri olarak servis periyodu ve kuruda kalma süresi yüksek süt verimi ve bunun devamlılığı açısından ayrıca dikkate alınması gereken uygulamalardır. Bu araştırmada, incelenen çevre faktörlerinin, pik süt verimine etkileri çok önemli bulunmuştur (P
Comparative Analysis of CNN Algorithms for Mushroom Classification with Proposed Lightweight CNN Model
Authors: Namlı Ahmet , Ölçer Didem
Published: September 2024

The classification of mushroom species presents significant ecologic and health-related challenges; advancement in classification techniques is required to gain reliable identifications. This study aims to explain a methodology that was devised and evaluated in the development of a novel, lightweight Convolutional Neural Network (CNN) designed specifically for the task of mushroom classification. The paper provides a custom CNN model that is computationally cost-effective and capable of high-precision classification, fit for real-time usage. Hence, the proposed model was evaluated on this dataset of curated mushroom images with traditional classifiers and state-of-the-art CNN architectures, such as EfficientNet-B7, ResNet50, InceptionV3, and MobileNetV2. The custom model is depth-wise separations engineered in such a way that while they reduce the computational load, they don't compromise the effectiveness of the model. The custom model achieved a test score of 0.68, which is moderate compared to more established models such as EfficientNet-B7 or ResNet50. This approach helps the model function effectively even on platforms having low computational resources. A comprehensive evaluation reveals that a custom CNN has reasonable accuracy in the identification of different mushroom species vis-à-vis existing models, but also significantly lightens the classification process.
Challenges in the management of inconclusive breast findings on mammography in educated Nigerian women
Authors: Aina Ifeoluwasemilojo , Oyedepo Victor , Olalere Ayankemi , Bello Temitope , Akanbi Olateju , Akanbi Bamidele , Ogboru Efetobo , Olowomeye Ogooluwa , Alabi Adeola
Published: September 2024

Introduction: Breast cancer is one of the leading causes of morbidity and mortality among women in middle to low-income countries with most women presenting with late disease. Mammography is a major screening tool for the early detection of breast cancer with wide coverage in developed countries when compared to low-income countries. This study aims to evaluate the mammographic findings of women in southwest Nigeria, and also the follow-up rate of women with inconclusive findings on mammograms, Methodology: This is a descriptive study of findings in women who presented for mammography at the Radiology Department of LAUTECH Teaching Hospital, Ogbomoso. Mammograms with two standard views were performed after the completion of a structured questionnaire and informed consent. The data was entered and analyzed using SPSS version 26 with a p-value ≤ 0.5. Results: A total of 250 women participated in the study with an average age of 52.3±8.70 years and an age range of 36-86 years. Diagnostic mammography (55.2%) was more common than screening mammography and the commonest indication was breast lumps (25.2%). Heterogeneously dense breast density pattern (BIRADS C) which may obscure small masses is the most common (40.8%) while the most common final BIRADS category is 2, benign findings (51.6%), followed by BIRADS 0 (20%). Only 13 out of the 51 cases of BIRADS 0 had complementary imaging studies, and 38 (75%) failed to show up. Further, telephone interviews revealed that the most common reason for failure of follow up is poor counselling and ignorance. Conclusion: There is a need to increase the awareness of regular mammograms for screening purposes in this environment as observed in developed climes and also for women to understand the clinical implication of their breast density pattern to reduce anxiety and increase their cooperation for further imaging studies.
Oxidative stress and antioxidant parameters in dogs with lymphoma during chemotherapy
Authors: Vajdovich Peter , Szabó Bernadett , Tarpataki Noémi , Jakus Judit
Published: September 2024

Purpose: Oxidative stress is a contributor in the development of neoplasms. OS is involved in multidrug resistance, adverse events, and outcome. Methods: Forty- two dogs with lymphoma have been included in the study, 30 of which were treated by Cyclophosphamide - Hydroxyldaunorubicin® (doxorubicin) - Oncovin® (vincristine) - Prednisolone (CHOP)-based protocol. Tumor samples were excised for histopatholgy, immunophenotyping, Ki67%, and biochemical analyses. Thiobarbituric acid reactive substances (TBARS), reduced and oxidized glutathione (GSH, GSSG), glutathione peroxidase (GSH-Px), Cu-Zn-superoxide dismutase (SOD), ferric reducing ability (FRAP), vitamin-C, -E, retinyl palmitate and trans-retinol in red blood cell hemolysates, lymph node homogenates, and blood plasma have been measured. The results were correlated with the outcome of the chemotherapy. Results: Median overall survival time (OST), relapse-free period (RFP) were 862 and 280 days, respectively, with adverse effects in 18 cases. Plasma GSH levels increased with age (dogs from 1 to 6 years vs 9 to 13 years, p = 0.0385). Lymph node FRAP levels were higher in samples with higher Ki67%, and plasma GSH/GSSG ratio was lower in dogs with increased OST and RFP. Plasma retinyl palmitate levels were lower in dogs with increased RFP. Overall survival time was increased with lower lymph node TBARS (cut off: 53 nmol/mg protein), GHS-Px (cut off: 16 U/mg protein), and higher plasma all-trans-retinol (cut off: 4 mg/ml). Relapse-free period was increased with lower lymph node TBARS (cut off: 53 nmol/mg protein), lower FRAP (cut off: 6 µmol/mg) and higher SOD (cut off: 70 U/mg protein). During chemotherapy a gradual increase in plasma vitamin E and C concentrations was detected, while GSH and GSSG showed a decrease before adverse events. Conclusion: Although oxidative stress parameters varied, some parameters, i.e. TBARS, GSH-Px, SOD, FRAP measured in lymph node samples, and plasma all-trans retinol might be used as prognostic indices.
A Review of Normal and Abnormal Sleep Related Movement Disorder during Life Span
Authors: Gadoth Natan
Published: September 2024

The state of normal sleep is characterized by diminished responsiveness to external stimuli and a familiar feeling of delight and refreshment. This feeling is accompanied by muscle relaxation and slowing of brain activity. Nevertheless, body movements are a feature of normal sleep and when those impair sleep quality and consequent daytime function they are defined as abnormal. The introduction of polysomnography during which muscle activity is monitored by electromyography and videotaping enabled sleep researches to precisely assess the characteristics of normal and abnormal movements, to determine their appearance is at specific sleep stages and to define their severity in regard to sleep quality and their impact on daytime function. Indeed, abnormal movements during sleep became an essential part of the symptomatology of a number of neurodegenerative disorders. Normal and abnormal movement disorder related to sleep onset, particular sleep stages and during awakening from sleep will be described in some detail. Common and rare forms of sleep related movement disorders in children and adults will be reviewed.
The Potential of Gene Editing Technologies in the Treatment of Hereditary Retinal Diseases
Authors: Tibi Salima
Published: September 2024

Hereditary retinal diseases refers to a group of diseases caused by mutations in genes and which manifest through impairment of vision up to blindness. New gene editing technologies especially the CRISP-Cas9 have presented new therapeutic possibilities for these diseases ‎1 . This review looks into the prospects of using gene editing as a treatment for HRDs, the mechanisms behind the technology, their benefits and the therms that gene editing faces ‎2 Different methods of gene editing are examined together with the successes recorded in experimental models, and the adaptation of these to clinical practice ‎3‎,4 , Some of the issues raised include the efficacy, the future outlooks and the incorporation of gene editing in the normal practice of ophthalmic ‎5‎,6‎,7 . , Gene editing is an emerging science carries a great potential to transform the current approach to patients’ treatment, paving the way for a unique and effective treatment of HRD
New Findings and Emerging Trends in Postpartum Mental Illness: Risk Factors and Treatments
Authors: Tackett Kathleen
Published: September 2024

Research on postpartum depression and co-occurring conditions, such as anxiety and posttraumatic stress disorder (PTSD), continues to accumulate at a rapid rate, with recent identification of new risk factors and treatments. This article highlights these recent findings. Recent studies have identified several groups of women more at risk for depression postpartum: women in the military; refugees, asylum seekers, and immigrants; women who gave birth during COVID, and women who smoke. In addition, there are several emerging treatments for depression that are promising that include non-pharmacologic and pharmacologic modalities. Among the non-pharmacologic treatments are acupuncture and repetitive transcranial magnetic stimulation (rTMS). New medications include ketamine and esketamine, and brexanolone and zuranolone. All these medications reduce symptoms quickly and have been approved to treat severe depression. Ketamine and esketamine have been approved for depression in general, while brexanolone and zuranolone specifically treat postpartum depression.
Biosensors application for SARS-CoV-2 detection
Authors: Farhat Maha , Alsaeed Aljowhara , Bahammam Manar , Alzayyat Nof , Alkattan Salma , Alidan Sara
Published: September 2024

In the light of the rapid diffusion of the coronavirus in the last four years and Vue the hinge of a proper management and prognosis of future possible outbreaks, this systematic review tackled several recent studies on SARS-CoV-2 detection approaches using nanotechnology-based biosensor devices as a successful tool in the early-stage detection of the Coronavirus. Notably, various biomarkers have shown significant applications of Electrochemical, field effect transistor, surface plasmonic resonance and piezoelectric based biosensors in the SARS-CoV-2 pandemic. These devices are showing instant rapid results (10 seconds), low detection limits (0.22 pM) and high sensitivity for early and effective diagnosis of coronavirus. The urgent need for early viral detection methods, vital for controlling infection, guiding therapy, and advancing vaccine studies have stressed the importance of biosensors in this field. More research is nevertheless required to streamline the production of these devices, making them more affordable and user-friendly.
The role of natural rubber latex nanoparticles in tissue engineering
Authors: Okamoto Masami
Published: September 2024

Natural rubber latex is derived from the lactiferous sap of the Hevea brasiliensis (para rubber tree) and has been used in traditional medicine due to its bioactive compounds. There are over 35,000 species of plants that produce latex. Recently, NRL has shown promise in tissue engineering for the replacement and regeneration of various tissues, such as skin, eardrums, bones, and dental alveoli. This presents a unique opportunity to repair or replace failing organs or tissues. This review highlights the current development of Natural rubber latex in tissue engineering, and identifies importance for investigation on cytotoxicity of Natural rubber latex nanoparticles. In addition, promising results regarding the current challenges and perspectives of Natural rubber latex-based tissue engineering is discussed.
The CAREPATH Study for Personalized Management of Multimorbidity in Elderly with Mild Cognitive Impairment and Mild Dementia
Authors: Erturkmen Gokce , Gencturk Mert , Akpinar A. Emre , Pournik Omid , Arvanitis Theodoros , Steinhoff Antje , Gappa Henrike , Robbins Tim , Mattu Rajan , Corcoles Ruben , Abizanda Pedro , Cramariuc Oana , Ciobanu Cristiana , Mohamad Yehya , Ayadi Jaouhar
Published: September 2024

Introduction: Multimorbidity is prevalent among older adults and is associated with cognitive impairment and dementia, increasing the need for innovative care solutions. The CAREPATH project, funded by the European Commission Horizon 2020 program, has developed an integrated care platform tailored to older adults with multimorbidity, particularly those with mild cognitive impairment or mild dementia. This platform aims to enhance screening, optimize personalized treatment, and support multidisciplinary care, aligning with the European Society of Medicine's policy framework for managing neurodegenerative diseases. Methods: This paper describes the methodology for implementing an integrated care platform focused on managing mild cognitive impairment and mild dementia. CAREPATH architecture supports multidisciplinary care teams in creating personalized treatment plans based on evidence-based guidelines, involving patients and their caregivers. The platform for healthcare professionals features modular disease pages for comprehensive care, including dedicated sections for screening complications and delivering non-pharmacological interventions such as nutrition, lifestyle, and physical exercise recommendations. Results: The CAREPATH platform has been fully implemented from a technical perspective, with the next step being the clinical investigation to evaluate its efficacy in improving health-related quality-of-life for older adults with mild cognitive impairment or mild dementia and its cost-effectiveness. This study will be conducted in two phases: a technical validation and usability study, followed by a clinical investigation (randomized clinical trial) across four European centers in Spain, Germany, the United Kingdom and Romania. Preliminary tests, including functional, integration, and laboratory system testing, have been conducted to ensure the platform's readiness, with most technical issues resolved. The TVU phase is scheduled to begin in September 2024.
Identificación de la respuesta sísmica en pirámides del área de Chichén Itzá para preservar el patrimonio cultural
Authors: Cárdenas-Soto Martín , Sánchez-González Jesús , Martínez-González José A. , Escobedo-Zenil David , Sandoval-Quintana Osiris , Carrillo-Vargas Armando , Argote-Espino Denisse L. , López-Garcia Pedro A. , Cifuentes-Nava Gerardo
Published: September 2024

Analizamos la respuesta sísmica de tres estructuras arqueológicas de la zona Chichén Itzá a fin de proveer elementos que permitan dar seguimiento a su preservación. Realizamos medidas de ruido sísmico ambiental con sismógrafos triaxiales de banda ancha por un periodo de tres días para cuantificar las frecuencias de vibración de los edificios de Las Monjas, El Caracol, y El Castillo o Pirámide de Kukulkán mediante cocientes espectrales HVSR. Los resultados muestran que en El Caracol predomina la frecuencia del suelo en 1.3 Hz. Sin embargo, en los edificios Las Monjas y El Castillo observamos una frecuencia fundamental de vibrar de 5.1 Hz con una amplificación relativa alrededor de 6. Este resultado muestra que estas dos pirámides se comportan como una capa de suelo sobre un estrato rígido. En el caso de El Castillo, el registro de ruido en un sismógrafo en su base permite observar un efecto de interacción cinemática debido a la diferencia de rigidez entre el suelo y la estructura. No observamos algún efecto direccional en los cocientes HVSR debido a la anisotropía interna de las pirámides. La estimación de la velocidad de corte es de 255 m/s (considerando que la respuesta sísmica es de origen topográfico, es decir, debido a que la pirámide representa una irregularidad en la superficie del suelo). Esta velocidad corresponde a materiales poco compactos que descansan sobre calizas competentes con velocidad mayores a 1000 m/s, materiales que son susceptibles a sufrir cambios de esfuerzos que eventualmente puede llevar a un deterioro estructural. Los hallazgos de este estudio sugieren que es necesario un seguimiento e instrumentación continua de los niveles inferiores para evaluar la influencia de las subestructuras durante las etapas preconstructivas y determinar si existen otros efectos debido a la naturaleza kárstica del subsuelo.
Exploración geofísica para la identificación de elementos arquitectónicos enterrados en la zona arqueológica Izapa, Chiapas
Authors: Argote Espino Denisse L. , Cifuentes Nava Gerardo , Uriarte Torres Alejandro J. , Pérez Alcántara Ivonne A. , López García Pedro A.
Published: September 2024

La zona arqueológica de Izapa fue un importante asentamiento prehispánico de probable filiación mixe-zoque en de la región del Soconusco, al sureste del actual estado de Chiapas, cuya secuencia ocupacional se extendió desde el Preclásico temprano (1800 a.C.) hasta el Postclásico temprano (1200 d.C.). A lo largo de su prolongada habitación, se realizaron diversos movimientos poblacionales al interior del asentamiento. Así, durante el periodo Clásico, en el conjunto conocido como Grupo F, del cual actualmente se encuentran protegidas sólo 2.88 ha, se construyeron estructuras monumentales que integraron un complejo cívico-ritual. Trabajos de investigación previos en este conjunto identificaron una prolongada secuencia constructiva, principalmente en el montículo mayor (Estructura 125-A). Con el objetivo de identificar posibles momentos constructivos anteriores, a los que actualmente se aprecian, y determinar el estado de conservación de algunas de sus estructuras monumentales, se realizó una prospección geofísica por medio de las técnicas de georradar y tomografía de resistividad eléctrica en diversas áreas del Grupo F. A través de estas, se lograron detectar diversas anomalías que pueden interpretarse como estructuras arqueológicas (como plataformas, canales y muros). Algunos de estos elementos pudieron comprobarse mediante excavaciones arqueológicas. Las diversas profundidades a las que se encuentran estas posibles estructuras hablan de una ocupación prolongada del Grupo F, con diversas modificaciones a su configuración arquitectónica.
Corrección de línea base semiautomática para espectroscopía infrarroja por transformada de Fourier (FTIR) para análisis arqueométricos
Authors: Nagaya Alan , de Lucio Oscar G. , Lopez Laura
Published: September 2024

La espectroscopía Infrarroja por Transformada de Fourier (FTIR) es una técnica ampliamente utilizada que provee información molecular de la muestra analizada, que es sensible al ambiente de análisis y cambios en este. Por ello cuando se adquiere el espectro de un material, es necesario considerar también el espectro de fondo, dado que es común que los parámetros experimentales se modifiquen, la línea base puede variar. Por ese motivo se propone un algoritmo semiautomático de corrección de la línea base para espectros obtenidos por la espectroscopía Infrarroja por Transformada de Fourier (FTIR). En el cual, se ajustan polinomios de Chebyshev de cuarto orden a puntos seleccionados por un criterio umbral. El algoritmo fue aplicado al análisis de mezclas de CaCO3 y SiO2 de concentraciones conocidas, mostrando que la información del espectro se preserva. Posteriormente se aplicó el método en la verificación de la cristalinidad de huesos calcinados obteniendo que el algoritmo considere la forma de las bandas. Preservando la información física de los espectros, y eliminando errores causados por el usuario. Además de considerar desplazamientos de las bandas.
Prospección con georradar en las calles de la ciudad de Mérida, Yucatán
Authors: Blancas Jorge , Barba Luis , Ligorred Josep , Ortiz Agustín , Bernal Itzayana , Uriarte Nadia
Published: September 2024

El estudio realizado en distintas zonas de la ciudad de Mérida, Yucatán, tiene como objetivos principales el localizar vestigios arqueológicos prehispánicos o coloniales, registrar zonas de nivelación del terreno de época Maya y verificar la existencia de zonas cársticas en el subsuelo, entre otros. Para estos estudios en zona urbana se empleó el georradar, una de las técnicas geofísicas no invasivas. Esta técnica permite detectar restos de estructuras bajo el pavimento de las calles, sin las interferencias propias de zonas urbanas, lo que reduce la necesidad de excavar u otras acciones que puedan modificar el área a estudiar. En esta etapa del proyecto se seleccionaron lugares en donde las líneas exploratorias recorridas en temporadas anteriores sugirieron la posibilidad de identificar restos arqueológicos bajo el pavimento de las calles de la ciudad. Se escogieron dos zonas en donde la investigación documental ha indicado la presencia de grandes basamentos que formaron parte de la ciudad maya de T’Hó, en otra zona se sospecha de la presencia de un monumento escultórico y también se incluyó el estudio en un parque arqueológico en las afueras de la ciudad. Los resultados confirmaron algunas de las hipótesis planteadas y en los lugares donde pudieron haber estado las plataformas se encontraron extensas reflexiones horizontales que se interpretan como nivelaciones del terreno antes de edificar las estructuras. En la zona de Kambul, entre otras cosas, se encontró una reflexión hiperbólica aislada que se ha interpretado como una gran piedra enterrada por lo que puede tratarse del monumento escultórico buscado. Los resultados en la zona arqueológica de Chen Hó muestran rasgos enterrados principalmente en el interior de los montículos estudiados. Además de los rasgos culturales se han encontrado una gran cantidad de anomalías más profundas que se interpretan como zonas carstificadas. Esto adquiere relevancia puesto que estos procesos geológicos con el tiempo suficiente pueden llegar a afectar la superficie.
ВПЛИВ УМОВ ВИСОКОТЕМПЕРАТУРНОГО НАВАНТАЖЕННЯ НА ЗМІНУ ФІЗИЧНОГО СТАНУ ІТРІЙВМІСНИХ ПОКРИТТІВ
Authors: Кубіч  Вадим , Фасоль Єлизавета , Чернета Олег
Published: September 2024

Наведено результати випробувань вихідних структур жаростійких ущільнювальних  покриттів з вмістом ітрію 0,1%; 0,3%; 0,5% у складі лігатур КНА-82, які попередньо були сформовані у газополум’яний та іоноплазмовий спосіб на малогабаритних дослідних зразках. Оцінені зміни фізичного стану зразків за приростом маси при моделюванні статичного високотемпературного навантаження шляхом витримки у обмеженому просторі електричної печі при температурі 1100 оС. Визначено, що приріст маси зразків із збільшенням вмісту ітрію змінюється за лінійною залежністю та суттєво відрізняється від характеру приросту маси за умовами моделювання динамічного навантаження у середовищі палаючої газової ізооктан-пропан-бутанові суміші при температурі 950-1020 ℃.
ОЦІНЮВАННЯ РІВНЯ ПОСЛУГ В ОРГАНІЗАЦІЇ З ТЕХНІЧНОГО ОБСЛУГОВУВАННЯ АВІАТЕХНІКИ ЗА ГРУПОВИМИ ПОКАЗНИКАМИ ЯКОСТІ
Authors: Мельник Володимир , Радько  Олег , Якименко Ілля , Василик Михайло
Published: September 2024

Викладено результати порівняльного аналізу оцінки ефективності роботи трьох авіапідприємств ТОВ "АВІАТЕЧ", ТОВ НВФ "МС АВІА-ГРЕЙД" і ТОВ "ЕЙР СЕРВІС" за показниками з якості. Дані організації надають послуги з технічного обслуговування (ТО) авіаційної техніки (АТ). Середня оцінка якості в організації з ТО АТ розраховується як середнє арифметичне групових показників якості для кожної організації з ТО. Запропоновано оцінювати рівень якості послуг за інтегральним показником якості. Інтегральний показник є підсумковим індикатором якості послуг, розрахованим на основі сукупності отриманих в процесі моніторингу оцінок якості різних складових процесів діяльності організацій з ТО АТ.
ДОСЛІДЖЕННЯ ДИНАМІКИ ПНЕВМОШПИНДЕЛЯ НА КОНІЧНИХ ГАЗОСТАТИЧНИХ ОПОРАХ ЗА ДОПОМОГОЮ ОБЧИСЛЮВАЛЬНИХ ЕКСПЕРИМЕНТІВ ЗАСОБАМИ CAD/CAE
Authors: Брешев Олексій , Носко Павло , Башта  Олександр , Герасимова  Ольга , Радько Максим , Соколовський  Дмитро
Published: September 2024

Наведено результати дослідження динамічної стійкості пневмошпинделя на конічних газостатичних підшипниках на основі визначення критичних частот обертання валу, амплітуд вимушених коливань та реакцій в опорах, рівня його допустимого дисбалансу. Розроблено тривимірні твердотільна, динамічна і кінцево-елементна моделі в САПР, визначено власні частоти коливань і критичні частоти обертання пневмошпинделя, проведено розрахунок та аналіз величин амплітуд вимушених коливань, реакцій в опорах пневмошпинделя на сталих та перехідних режимах обертання. Визначено умови, за яких високошвидкісний пневмошпиндель збереже свою динамічну стійкість та працездатність.
КОМБІНОВАНА ОБРОБКА І МЕХАНІЗМ ЗНОШУВАННЯ АЗОТОВАНИХ ПОКРИТТІВ НА ТИТАНОВОМУ СПЛАВІ ВТ-6
Authors: Харченко Володимир , Кіндрачук  Мирослав , Марчук Володимир , Юрчук  Аліна , Костецький  Іван
Published: September 2024

Досліджено вплив попередньої лазерної обробки на інтенсивність азотування, структуру та характеристики зносу азотованих покриттів на титановому сплаві ВТ6. Показано, що попередня обробка зменшує час азотування, при цьому збільшується товщина азотованого шару. Інтенсивність зношування визначають самоутворювальні в контакті трибологічні структури дисипативного типу, що формуються з ультра-дисперсних продуктів взаємодії речовин твердих тіл і змащення. Зносостійкість покриттів, отриманих із попередньою обробкою, у півтора-два рази вища, ніж покриттів, отриманих традиційним методом.
Cluster synchronization in a chain of bistable self-exited elements
Authors:   Lobachevsky State University of Nizhny Novgorod, Makarov Valerij , Nekorkin Vladimir ,   Institute of Applied Physics of the Russian Academy of Sciences
Published: September 2024

The phenomenon of synchronization of oscillations in а chain of bistable oscillators is investigated. It is revealed that the mutual synchronization of oscillations occurs to formation of phase or frequency clusters. The connection between sites of clusters in the chain and spatial dynamics of the system is discussed.
Transient processes in recursive digital second-order system with nonlinearity of saturation
Authors:   P. G. Demidov Yaroslavl State University, Brjuhanov Jurij
Published: September 2024

Free oscillations in а system with saturation type of adder characteristic are investigated. At parameters chosen inside two arcas, processes of development of motions of periods one, two ап four are considered. Phases of motions аt transient regime are determined. Expressions for calculating of their duration are obtained.
Complex dynamics of coherent structures in two-stream vircator
Authors:   Immanuel Kant Baltic Federal University, Hramov Aleksandr
Published: September 2024

System of virtual cathode oscillators with electrostatic coupling-vircator оп oncoming streams is investigated with the aid of numerical simulation. The existence of different regimes, including the synchronisation and chaotic generation, is shown. Physical processes in the system are determined by the formation of electron patterns in each beam. The inner structures in the beam are analysed by the orthogonal decomposition by Karhunen-Loeve method. The simplest finite-dimension model-analogy is proposed to illustrate of аn interaction between electron structures in the beam, that leads to chactic dynamics of virtual cathode oscillation.
The model of interactions of two scientific fields with exponential growth of achievements bounded by nonlinearity
Authors:   Federal State Autonomous Educational Institution of Higher Professional Education ", Kachak Valerii ,   National Research Technological University",   MISiS ", Mchedlova Elena ,   Saratov State University
Published: September 2024

One model of interaction of two scientific fields is suggested. The model described by system of ordinary differential equations with nonlinearity. Analysis of phase space and realizations comparison allowed to investigate the cvolution of scientific fields qualitatively, taking into account the exponental growih of achievements bounded by nonlinearity. The different types of interactions between scientific fields (cooperation, competition and suppression) and their own dynamics (developed, degraded) were considered.
nformation concerning the states open systems
Authors:   Lomonosov Moscow State, Klimontovich Yury
Published: September 2024

The concept of the Shannon information in the theory of communication is wellknown. The information is thus connected with entropy which is the most complete measure of degree of uncertainty states at the statistical description of macroscopic objects. In open systems the sequences of nonequilibrivm phase transition are possible. They can lead both to degradation, and to self-organization. In these cases entropy serves as the measure of relative degree of chaoticity states of open systems. In the paper for the first time the definition of information concerning the states of open systems is proposed. The concrete definition of the information for processes in Boltzmann gas, for nonlinear Brownian motion in autoosciilatory systems - generators are presented. The connection of concept of information with the criterion of a relative degree chaoticity - with S-theorem, as well as with definition of Lyapunov functionals for open systems is established. The definition of the information for the medico-biological systems, where one of the main concepts is the «norm of chaoticity», is considered as well.
Gap solitons
Authors:   Lomonosov Moscow State University, Polyakov Sergey , Sukhorukov Anatoly ,   Lomonosov Moscow State University
Published: September 2024

In this paper we present the studies of the problem of slow and immobile solitons which are excited inside the stop bands of inhomogeneous media with either quadratic or cubic nonlinearity. We found an integral criterion of slow soliton formation, determined the main properties of gар solitons. The dynamics of parametric gap soliton formation and propagation in quadratic media is illustrated by means of computer simulations and compared with such solitons due to cubic nonlinearity.
Сhaotic oscillations in a model of vocal source
Authors:   Lomonosov Moscow State University, Landa Polina
Published: September 2024

A model of human vocal folds in the form of two spring-loaded plates, which can collide with one another, is considered. It is shown that due to air flow between the plates excilation of chaotic self-oscillations occurs. In this process the shape of oscillations of flow volume velocity was found to be close to observed experimentally.
Oscillations in coupled controlled oscillating systems
Authors:   Institute of Applied Mathematics and Cybernetics. Nizhny Novgorod state University, Ponomarenko Valerij
Published: September 2024

The results of investigation of dynamical regimes and bifurcation transitions in phase and dclay controlled coupled autogenerators arc presented. Regularities о beginning and transformation of oscillatory motions depending on initial frequency and delay mismatch are studied. Numerical simulation of the equations which describe the dynamics of the system reveals complex oscillatory regimes, impossible in autonomous partial generators.
Influence of self-heating on output signal spectrum of Gunn oscillators
Authors:   Saratov State University, Usanov Dmitrij , Skripal Aleksandr ,   Saratov State University, Babayan Andrei ,   Saratov State University
Published: September 2024

An output signal spectrum changings to Gunn oscillators for various power supply voltage were analyse for the first time оп the base of the Kirchhoff’s equations share solution with the non-stationary thermal balance equation. The mode of generation at power supply voltage, close to threshold, is circumscribed as the complex dynamic process, possessing random properties. Self-heating of а chip of the Gunn diode depending оп power supply voltage results or in а regularization of oscillations, or to origin of asynchronous oscillations and them chaotisation.