bluuebunny/crossref_metadata_2025 huggingface dataset:
Percepción y temporalidad: Husserl frente a Heidegger
Authors: García José Luis
Published: December 2024

Este texto se inscribe en una copiosa tradición bibliográfica que ha buscado los puntos de encuentro y desencuentro entre las figuras fenomenológicas más importantes del siglo XX: Husserl y Heidegger. De esta forma, y partiendo de las bases crítica que supone la irrupción pública del proyecto de la ciencia originaria heideggeriana en 1919, me propongo, en primer lugar, repasar la crítica de Heidegger a la historia de la filosofía, la cual, a su juicio, ha cometido el pecado original de ser teórica; y, en esa línea, cómo dicha teorización se ha visto, principalmente, en la absolutización de la percepción al momento de describir la relación originaria entre el ser humano y el mundo. Este hilo crítico, aunque no sea explícito, llega hasta las canteras de Husserl. Frente a esto, en segundo lugar, ensayo una posible respuesta a dicha crítica a la luz del descubrimiento husserliano del flujo absoluto, el cual podemos extraer de las Lecciones sobre la conciencia interna del tiempo.
El concepto de tiempo más originario en Husserl: la atemporalidad del presente viviente
Authors: Ramírez Manuel
Published: December 2024

Las reflexiones de Husserl sobre el presente viviente llevaron a determinarlo como una conciencia atemporal que no constituye activamente los objetos temporales inmanentes. Esta característica del proceso originario implicaría dejarla fuera del campo fenomenológico trascendental. No obstante, el artículo intenta mostrar que mediante una reconstrucción arqueológica sabemos que el presente viviente, no solo es un problema límite, sino que “constituye” de forma pasiva sus objetos temporales y se sabe de sí mismo a través de su autoafección, lo que lo inserta en el campo fenomenológico-trascendental.
FROM IDEOLOGY TO IDENTITY: THE COMPLEX REALITIES OF INTERNATIONAL MILITARY VOLUNTEERS IN UKRAINE
Authors:   “Henri Coandă” Air Force Academy, Braşov, Romania, PANAIT Cristian
Published: December 2024

The ongoing conflict in Ukraine has drawn international military volunteers
motivated by ideals far removed from financial gain. Unlike mercenaries, who fight primarily for
monetary reward, these volunteers are driven by ideological convictions, humanitarian empathy,
and a quest for identity and purpose, often risking their lives to support Ukraine’s sovereignty.
This study investigates the complex motivations, psychological impacts, and battlefield challenges
faced by these volunteers. Through available literature review, this article synthesize findings
from diverse studies to present a analysis of the motivations and mental health impacts that define
this group. The analysis reveals three primary motivational themes: a commitment to defending
democratic values, a strong sense of humanitarian duty, and a desire for personal transformation.
Volunteers report significant psychological challenges, with the stress of modern technological
warfare, exacerbated by surveillance and cyber operations, intensifying the need for resilience
and tactical adaptability. The findings underscore the high psychological cost of volunteerism
and highlight the critical difference between ideologically driven volunteers and mercenaries.
This study contributes to conflict and military psychology by offering nuanced insights into
modern military volunteerism. The findings underscore the need for legal protections,
comprehensive mental health support, and post-conflict reintegration programs, aiming to
support these volunteers who fight not for profit but for principle and solidarity.
Végétation forestière des savanes centrafricaines
Authors: Boulvert Yves
Published: December 2024

La République Centrafricaine (anciennement Oubangui-Chari) est située à la jonction des régions de la Guinée, du Congo et du Soudan. Parallèlement à la diminution des précipitations en direction du nord, la végétation passe de la forêt humide à une steppe arbustive du sud-ouest au nord-est.Les savanes couvrent les quatre cinquièmes du territoire. Elles peuvent être subdivisées en quatre domaine : un domaine congo-guinéen avec des savanes arbustives communes comprenant Terminalia glaucescens ; un domaine soudano-guinéen où prédominent Anogeissus leiocarpus, Albizia zygia (ou Burkea africana), Lophira lanceolata et Daniellia togoensis ; un domaine médio-soudanien caractérisé par Isoberlinia doka, Monotes kerstingii et Uapaca togoensis, avec Butyrospermum paradoxum spp. parkii ; et le début d'un domaine soudano-sahélien marqué par l'apparition de Capparacées. La République Centrafricaine représente également une zone de transition entre l'Afrique de l'Ouest et l'Afrique de l'Est.Les espèces ligneuses s'étendent généralement sur deux ou trois de ces zones. Les limites phytogéographiques s'interpénètrent ; elles ne sont clairement délimitées que lorsqu'elles correspondent à des frontières naturelles, qu'elles soient géomorphologiques (l'escarpement de Bouar) ou édaphiques (les plateaux gréseux de Ouadda ou de Carnot). En conclusion, l'accent est mis sur l'interdépendance des différents facteurs du milieu naturel par rapport à la dégradation de la végétation.
Une politique forestière étrangère pour la France. Coopération avec les pays tropicaux forestiers
Authors: Huguet Louis
Published: December 2024

Cet article ne traite que des forêts tropicales humides d'Asie, d'Afrique et d'Amérique latine (un peu moins de 1 000 millions d'hectares) et des bois qu'elles produisent, dont la France importe de grandes quantités. Il est cependant fait référence à la valeur des pays tropicaux humides pour la production de biomasse en tant que matière première pour la production de charbon de bois, de cellulose et de méthanol. En 1980, le déficit de la balance commerciale française pour les produits forestiers s'élevait à 12.000 millions de francs. Il s'agit du deuxième déficit commercial le plus important après celui du pétrole. Les 3,6 millions de mètres cubes (équivalent bois rond) que la France a importés en 1980 représentaient 45 % de la valeur des 18 millions de mètres cubes de grumes que la France produit sur son propre territoire. Cette dépendance de la France à l'égard des pays en développement producteurs de bois tropicaux pose à l'économie française un problème d'autant plus grave que, pour les raisons évoquées dans cet article, le marché des bois tropicaux est de plus en plus un marché de vendeurs. L'auteur arrive à la conclusion que la seule solution pour la France est d'adopter une véritable politique forestière extérieure visant à favoriser l'investissement français dans des joint-ventures dans les pays tropicaux qui sont des producteurs actuels ou potentiels de bois et peut-être aussi de biomasse forestière.
The Fundamental Need for Psychological First Aid as an Early Intervention to Minimize Psychological Consequences for Individuals Post-Natural Earthquake
Authors: Aref Abu Sabra Mohammad
Published: December 2024

The recent earthquake in Turkey and Syria caused immense suffering, leaving thousands dead, missing, or homeless, with severe psychological consequences expected, especially for children. Psychological First Aid (PFA) is a recommended early intervention to address these effects, particularly for those already exposed to trauma from war, displacement, or the COVID-19 pandemic. Training in PFA can help survivors cope and adapt, and mental health professionals are key in delivering these interventions. Governments and NGOs should invest in training and supporting practitioners to provide PFA effectively.
Preventive Examinations for Early Detection of Oral Cancer Conducted among Alcohol Addicts
Authors: Burja Vladić Monika , Matošić Ana , Špiljak Bruno , Šimunović Luka , Puljić Antonia , Kilić Domagoj , Mimica Sarah , Jelkić Magdalena , Andabak Rogulj Ana , Brailo Vlaho , Lončar Brzak Božana , Škrinjar Ivana , Vojnović Daniela , Karlović Zoran , Vidović Juras Danica
Published: December 2024

Aim: This study evaluated oral cancer (OC) awareness, risk factors, preventive measures, and early detection in high-risk populations. Materials and methods: Participants included an experimental group (EG) of patients treated for alcohol-related mental disorders at University Hospital Center Sestre milosrdnice (June 2022-March 2023) and a control group (CG) screened during the Oral, Head and Neck Cancer Awareness Week (April 2023) at the University of Zagreb’s School of Dental Medicine. Both groups were surveyed to evaluate their understanding of OC, their opinions, smoking and alcohol consumption habits. Results: In a study of 282 participants, 68.1 % were in the EG and 31.9 % in the CG, with a gender distribution of 34.4 % female and 65.2 % male, and a median age of 52. Smoking was more prevalent in the EG (72.5 %) than in the CG (24.4 %). The EG also had significantly lower education levels (p < 0.009). Awareness of OC was high in both groups (73.2 % EG, 85.4 % CG), but only a small fraction had previously attended screening examinations (SE) (6.9 % EG, 18.7 % CG). A large majority believed that alcohol and smoking together increased OC risk (95.7 % EG, 98.7 % CG), and many expressed interest in learning more about OC (83.2 % EG, 75.3 % CG). Higher education was linked to more frequent SE attendance (p = 0.041) and lower smoking rates (p = 0.042). Conclusion: The study highlights the need for enhanced OC education and screening, especially among high-risk groups, to improve prevention and early detection efforts.
Office-based indocyanine green fluorescent angiography for surgical planning of pedicled flap division
Authors: Almadani Hamzah , Van Yvu Robert , Brazio Philip S.
Published: December 2024

Delayed pedicled flaps are a reliable reconstructive tool for limb salvage. Determining the optimal timing for pedicle division is critical for surgical success and minimizing complications. Assessment of optimal timing has traditionally relied on arbitrary timing or subjective measures. This study explores the use of indocyanine green (ICG) angiography in the office setting as an objective guide for timing the delayed pedicled flap pedicle division, aiming to improve surgical outcomes and resource efficiency. In the outpatient setting, ICG is administered intravenously while the flap pedicle is under tourniquet control. If the distal flap opacifies with the tourniquet still applied, appropriate revascularization has occurred, and the pedicle may be safely divided. We present the example of a 47-year-old male with multiple previous flap reconstructions who eventually required a reverse sural artery flap. Initial intraoperative ICG imaging on postoperative day (POD) 23 revealed insufficient perfusion, prompting the postponement of pedicle division. Subsequent office-based imaging on POD 47 revealed a persistent lack of neovascularization. Adequate vascularization was demonstrated on POD 81, enabling successful pedicle division in the operating room on POD 121 without complications. ICG fluorescent angiography can guide the timing of division for delayed pedicled flaps. We recommend its use in the outpatient setting to decrease unnecessary operating room usage and anesthetic events and reduce the risk of wound healing complications from early pedicle division.
EXPLORING AL-FĀRĀBĪ’S SECRETS IN HARMONIZING SCIENCE AND RELIGION
Authors: Malyuna Sita Isna , Fuad Ah. Zakki , Mas’ud Ali
Published: December 2024

Harmonization between science and religion in al-Fārābī’s thought is an important topic in addressing the challenges of paradigm differences between the two in modern society. This research aims to explore al-Fārābī’s views on the integration of spiritual values and scientific rationality and their relevance to contemporary challenges. Using a qualitative method based on a literature study, this research analyzes al-Fārābī’s works as well as supporting literature that discusses the relationship between science and religion. The results show that al-Fārābī viewed science and religion as two different paths that lead to the same goal, which is the highest human happiness. Science provides rational knowledge to understand the physical world, while religion offers moral guidance to live life. In al-Fārābī’s view, the two complement each other, with science playing a role in revealing the nature of reality and religion providing ethical and spiritual meaning. This research emphasizes that al-Fārābī’s thoughts are relevant in the context of holistic education, ethical development in science and technology, and dialogue between science and religion. This approach can serve as a foundation for moral and rational value-based policies, creating a balance between intellectual progress and social responsibility. Thus, the harmonization of science and religion not only addresses the conflict between the two but also contributes to the construction of a just society with integrity. This research proposes that such integration can be a comprehensive solution to global issues such as technological ethics, climate change, and pluralism.
Duality Principles and Numerical Procedures for a Large Class of Non-Convex Models in the Calculus of Variations
Authors: Botelho Fabio Silva
Published: December 2024

This article develops duality principles and numerical results for a large class of non-convex variational models. The main results are based on fundamental tools of convex analysis, duality theory and calculus of variations. More specifically the approach is established for a class of non-convex functionals similar as those found in some models in phase transition. Finally, in some sections we present concerning numerical examples and the respective softwares.
Sharp Estimates of Pochhammer’s Products
Authors: Lampret Vito
Published: December 2024

Sharp, asymptotic estimates of classical and generalized rising/falling Pochhammer's products having positive arguments are presented on the basis of Stirling's approximation formula for $\Gamma$ function.
Physical Activity, Physical Fitness and Energy Intake Predict All-Cause Mortality and Age at Death In Extinct Cohorts of Middle-Aged Men Followed-Up for 61 Years
Authors: Menotti Alessandro , Puddu Paolo Emilio
Published: December 2024

Objective
The study the relationships or working physical activity, physical fitness and energy intake on all-cause mortality and age at death in cohorts of middle-aged men followed-up for 61 years.
Material and Methods
In 1960 there were 2 residential cohorts of middle-aged men examined for a total of 1712 subjects and 3 indexes were measured, i.e. physical activity by a questionnaire (3 classes, sedentary, moderate, vigorous: Phyac) , physical fitness estimated by combining arm circumference, heart rate and vital capacity by Principal Component Analysis whose score was divided in 3 tertile classes (low, intermediate and high: Fitscore) and energy intake in Kcalories estimated by a dietary history divided in 3 classes (low, intermediate, high: Calories), plus a number of 5 traditional cardiovascular risk factors (age, cigarette smoking, body mass index, systolic blood pressure and serum cholesterol). Cox models were used to predict all-cause mortality as a function for those adjusted indexes. Multiple Linear Regression Models were used to predict age at death as a function of the same co-variates.
Results
There were large correlations across the 3 indexes. Prediction of all-cause mortality showed the independent and complementary roles of the 3 indexes all statistically significant and all being protective for their highest levels. The same outcome was found predicting age at death.
Conclusions
Working physical activity, a score of physical fitness and energy intake are all directly related to lower all-cause mortality and to higher age at death thus suggesting a large part of independence.
Exploiting the Potential of Ankistrodesmus braunii Polysaccharides: A Focus on Cutaneous Biocompatibility
Authors: Morocho-Jácome Ana Lucía , Carvalho João Carlos Monteiro de , Rosolia Danilo Martini , Velasco Maria Valéria Robles , Cabral Laertty Garcia de Sousa , Rijo Patrícia , Rosado Catarina , Baby André Rolim
Published: December 2024

Current demands for sustainable cosmetic sources containing naturally derived compounds have led to extensive research for promising microalgae strains for large-scale cultivation. Given the enormous variety of microalgae strains, as well as their diverse cosmetic potential, here, we cultivated Ankistrodesmus braunii in tubular photobioreactors to extract polysaccharides (PSs) aiming their incorporation into a dermocosmetic prototype gel. In vitro antioxidant activity was determined by the DPPH• (2,2-diphenyl-1-picrylhydrazyl) assay, and the in vivo experiments were performed on participants., being the skin superficial (SK) hydration and transepidermal water loss (TEWL) measured to determine cutaneous biocompatibility, i.e., the PS safety. A. braunii aqueous PS had superior performance through the DPPH• test, thus, it was incorporated in a gel prototype, and its safety profile was established by the cutaneous biocompatibility assay. The biocompatibility of the samples was confirmed by the SK hydration and TEWL results, which were not affected after the application of the gels. Our results suggested not only the biocompatibility of the microalgae PS dermocosmetic, but also the in vitro antioxidant potential, confirming this material's conceivable as a new ingredient in cosmetic formulations.
How Significant Are Marine Invertebrate Collagens? Exploring Trends in Research and Innovation
Authors: Almeida Mariana , Silva Tiago , Solstad Runnar Gjerp , Lillebø Ana I. , Calado Ricardo , Vieira Helena
Published: December 2024

This review is focused on the research, innovation and technological breakthroughs on 16 marine invertebrate collagens and their applications. The findings reveal that research dates back to the 1970s, and after a period of reduced activity, interest in collagens from several marine invertebrate groups was renewed around 2008, likely driven by the increased commercial interest in these biomolecules of marine origin. R&D is predominantly reported from China and Japan, highlighting significant research interest in cnidarians (jellyfish), echinoderms (sea cucumbers, sea urchins and starfish), molluscs (squid and cuttlefish) and sponges. Co-word analysis of the literature highlights applications in regenerative medicine, the properties of hydrolysates, and biology and biochemistry studies. Innovation and technological landscape, however, focuses on fewer taxonomic groups, possibly reflecting the challenge of sustainably sourcing raw materials, with a higher number of patents coming from Asia. Globally, jellyfish collagen is the most prominent marine invertebrate source, while Asia also emphasizes the use of collagens derived from molluscs and sea cucumbers. Europe, despite fewer patents, explores a broader range of taxonomic groups. Globally, key applications registered are mostly in medical, dental and toiletry area, with peptide preparations spanning also multiple animal groups. The food domain is notably relevant for molluscs and sea cucumbers. Market trends show a strong presence of cosmetic and supplement products, aligning with market reports that predict a growing demand for marine collagens in cosmetics and personalized nutrition, particularly in targeted health supplements.
Enhancing Gut Microbiome and Metabolic Health in Mice Through Administration of the Presumptive Probiotic Strain Lactiplantibacillus pentosus PE11
Authors: Farmakioti Ioanna , Stylianopoulou Electra , Siskos Nikistratos , Karagianni Evangelia , Kandylas Dionysios , Vasileiou Andreas Rafail , Fragkiskatou Fragkiski , Somalou Paraskevi , Tsaroucha Alexandra , Ypsilantis Petros , Panas Panayiotis , Kourkoutas Yiannis , Skavdis George , Grigoriou Maria E
Published: December 2024

Over the past decade, probiotics have gained increasing recognition for their health benefits to the host. While most research has focused on the therapeutic effects of probiotics in the treatment of various diseases, recent years have seen a shift towards exploring their role in enhancing and supporting overall health. In this work, we have studied the effects of a novel potential probiotic strain, Lactiplantibacillus pentosus PE11, in healthy mice following a six-week dietary intervention. The assessment included monitoring the general health of the animals, biochemical analyses, profiling of the gut and fecal microbial communities and gene expression analysis. Our results showed that the administration of Lactiplantibacillus pentosus PE11 led to significant changes in the composition of the fecal microbiome, specifically an increase in the Firmicutes/Bacteroidetes ratio and in the relative abundance of the Lachnospiraceae, Ruminococcaceae and Rikenellaceae families. Additionally, a significant reduction in triglyceride and alanine aminotransferase levels was observed, along with a trend toward decreased total cholesterol levels. Our results suggest that in healthy mice Lactiplantibacillus pentosus PE11 has the potential to positively influence gut microbiome structure and metabolism, thereby supporting improved overall health.
Cooperative and Independent Functionality of tmRNA and SmpB: A Multifunctional Exploration Beyond Ribosome Rescue
Authors: Bai Taipeng , Li Juanjuan , Chi Xue , Li Hong , Tang Yanqiong , Liu Zhu , Ma Xiang
Published: December 2024

The trans-translation system, mediated by transfer-messenger RNA (tmRNA, encoded by the ssrA gene) and its partner protein SmpB, helps release ribosomes stalled on defective mRNA and targets incomplete protein products for hydrolysis. Knocking out the ssrA and smpB genes in various pathogens leads to different phenotypic changes, indicating that they have both cooperative and independent functionalities. This study aims to clarify the functional relationships between tmRNA and SmpB in Aeromonas veronii, the pathogen that cause threats in aquaculture and human health. We characterized the expression dynamics of the ssrA and smpB genes at different growth stages of the pathogen, assessed the responses of deletion strains ΔssrA and ΔsmpB to various environmental stressors and carbon source supplementations, and identified the gene regulatory networks involving both genes by integrating transcriptomic and phenotypic analyses. Our results showed that the gene ssrA maintains stable expression throughout the bacterial growth period, while smpB exhibits upregulated expression in response to nutrient deficiencies. Compared to the wild type, both ΔssrA and ΔsmpB strains exhibit attenuated resistances to most stress conditions. However, ΔssrA independently responds to starvation, while ΔsmpB specifically shows reduced resistance to higher concentration of Fe³⁺/Na⁺ ions and higher utilization of the carbon source β-methylglucoside. Transcriptomic analysis supports these phenotypic results, demonstrating that tmRNA and SmpB cooperate under nutrient-deficient conditions but operate independently in nutrient-rich environments. Phenotypic experiments confirm that SsrA and SmpB collaboratively regulate genes involved in siderophore synthesis and iron uptake systems in response to extracellular iron deficiency. The findings of the present study provide crucial insights into the functions of the trans-translation system and highlight new roles for tmRNA and SmpB beyond trans-translation.
Airway Colonization in Children with Medical Complexity: Challenges and Management Strategies
Authors: Fainardi Valentina , Rizzo Luisa , Zambelli Giulia , Berzieri Martina , Maugeri Erika , Giacalone Elena , Carbone Roberta , Pera Maria Carmela , Esposito Susanna
Published: December 2024

Over recent years, advances in medical care have significantly improved the survival of children with severe chronic conditions. These children, referred to as children with medical complexity (CMC), present unique and demanding healthcare challenges. Although definitions of CMC re-main inconsistent, these patients are typically characterized by chronic, often severe conditions requiring daily specialized treatments and the use of various medical devices. CMC represent a substantial burden for healthcare systems due to their high medical costs and place considerable strain on caregivers, who must provide continuous assistance. Airway colonization by pathogens such as Pseudomonas aeruginosa, methicillin-resistant Staphylococcus aureus (MRSA), and Haemophilus influenzae is common in CMC and contributes to recurrent respiratory infections, increased hospi-talizations, and progressive lung damage. The management of airway colonization in this popula-tion is a topic of ongoing debate, often involving a combination of airway clearance techniques (ACT) and antibiotic therapies. Antibiotics may be administered systemically, nebulized, or in combination, depending on the clinical context and severity of the condition. This review highlights the complexities of managing airway colonization in CMC, emphasizing the need for tailored therapeutic approaches to mitigate respiratory complications and improve outcomes.
Brucella ceti in Common Dolphins (Delphinus delphis) in Portugal – Characterization of First Isolates
Authors: Cavaco Sandra , Grilo Miguel L. , Dias Ricardo , Nunes Mónica , Pascoal Pedro , Pereira Marcelo , Fogaça Catarina , Costa Ana Beatriz , Pardal Sofia , Ferreira Ana Cristina
Published: December 2024

This study investigates Brucella ceti infection in marine mammals stranded along the Lisbon and Tagus Valley coast between 2022 and mid-2024, marking the first report of Brucella presence in Portuguese waters. Out of 59 examined marine mammals, B. ceti was isolated in three common dolphins (5.1%), a prevalence rate consistent with previous studies from other coastlines. Pathological findings varied, with one dolphin exhibiting neurobrucellosis-like symptoms and others showing diverse clinical presentations, complicating diagnosis. PCR-based detection indicated a higher infection rate (23.7%), suggesting underestimation in prevalence due to sample preservation status. Multilocus Sequence Typing (MLST) and Multiple-Locus Variable-Number Tandem-Repeat Analysis (MLVA) revealed distinct genetic profiles and close relationships to B. ceti strains from the Atlantic, supporting the hypothesis of specific host-adapted lineages in dolphins. These findings underscore the need for further research and surveillance to understand B. ceti transmission, host range, and impacts on Atlantic cetaceans, as well as to develop effective diagnostic and management strategies to mitigate infection risks in marine environments.
Surfactant-Enhanced Guava Seed Biosorbent for Lead and Cadmium Removal: Kinetics, Thermodynamics, and Reusability Insights
Authors: Tapia-Quiroz Gabriela Elizabeth , Valencia-Leal Selene Anaid , Vázquez-Guerrero Adriana , Alfaro-Cuevas-Villanueva Ruth , Escudero-García Ramiro , Cortés-Martínez Raúl
Published: December 2024

Heavy metal pollution in water resources represents a severe environmental and public health challenge, with cadmium (Cd) and lead (Pb) being some of the most toxic contaminants. Finding new sustainable, efficient, and cost-effective methods for water treatment is essential to address such problems. Therefore, this study investigates the biosorption capabilities of natural (SN) and surfactant-modified (SM) guava seed biosorbents to remove Cd and Pb from aqueous solutions. To enhance their adsorption efficiency, Guava seeds, an agricultural waste material, were treated with hexadecyltrimethylammonium bromide (HDTMA-Br). The biosorbents were characterized by FTIR, SEM-EDS, and zeta potential analysis to understand the surface modifications and their influence on the adsorption mechanisms. Batch experiments were performed to evaluate the effects of pH, contact time, temperature, biosorbent dosage, and concentration on Cd and Pb removal efficiencies. Adsorption isotherm and kinetic data were analyzed using mathematical models to obtain the basic parameters of the systems under study. The results showed that SM exhibited superior adsorption capacities of 328 mg/g for Cd and 594 mg/g for Pb at 25 °C, significantly outperforming SN. The study also analyzed the thermodynamic parameters of adsorption systems, revealing endothermic and exothermic properties for SN and SM. Functional groups, such as hydroxyl and carbonyl, were crucial in metal ion binding. HDTMA-Br introduced additional active sites and enhanced surface charge interactions. Regeneration tests showed the reusability of both biosorbents, maintaining an efficiency of over 85% after four cycles. Guava seeds, after surfactant modification, could be cost-effective and sustainable biosorbents for heavy metal removal in water treatment.
Structural and Electrical Properties of Cu-Based Coordination Complexes: Insights from In Situ Impedance Spectroscopy
Authors: Pisk Jana , Dunatov Marko , Stojić Martina , Judaš Nenad , Razum Marta , Pavić Luka
Published: December 2024

This study examines the influence of ligand design on the structural, optical, and electrical properties of copper-based coordination complexes. Ligands H2L1 and H2L2 were synthesized via reaction of 5-nitrosalicylaldehyde with 2-hydroxy- or 4-hydroxybenzhydrazide, respectively. H4L3 was obtained from the reaction of carbohydrazide and salicylaldehyde, while H4L4 was prepared by condensing 4-methoxysalicylaldehyde with thiocarbohydrazide. The research focuses on two key design elements: (1) the effect of hydroxyl group positioning on the aroyl ring in hydrazide ligands (H2L1 vs. H2L2) and (2) the impact of carbonyl versus thiocarbonyl groups and aldehyde substituents in hydrazone ligands (H4L3 vs. H4L4). The resulting complexes, [Cu2(L1)2], [Cu2(L2)2]∙3MeOH, [Cu2(L3)(H2O)2], and [Cu2(L4)(H2O)2], were synthesized and characterized using attenuated total reflectance infrared (IR-ATR) spectroscopy, thermogravimetric analysis (TG), and UV-Vis diffuse reflectance spectroscopy. Their electrical properties were investigated using solid-state impedance spectroscopy (IS). This study underscores the pivotal role of ligand modifications in modulating the functional properties of coordination complexes, offering valuable insights for the advancement of materials chemistry.
Comparison of In Situ and Postsynthetic Formation of MOF-Carbon Composites as Electrocatalysts for the Alkaline Oxygen Evolution Reaction (OER)
Authors: Sondermann Linda , Voggenauer Laura Maria , Vollrath Annette , Strothmann Till , Janiak Christoph
Published: December 2024

Mixed-metal nickel-iron, NixFe materials draw attention as affordable earth-abundant electrocatalysts for the oxygen evolution reaction (OER). Here nickel and mixed-metal nickel-iron metal-organic framework (MOF) composites with the carbon materials ketjenblack (KB) or carbon nanotubes (CNT) were synthesized in situ in a one-pot solvothermal reaction. As a direct comparison to these in situ synthesized composites, the neat MOFs were postsynthetically mixed by grinding with KB or CNT, to generate physical mixture composites. The in situ and postsynthetic MOF/carbon samples were comparatively tested as (pre-)catalysts for the OER and most of them outperformed the RuO2 benchmark. Depending on the carbon material and metal ratio the in situ or postsynthethic composites performed better, showing that the method to generate the composite can influence the OER activity. The best material Ni5Fe-CNT was synthesized in situ and achieved an overpotential (η) of 301 mV (RuO2 η = 354 mV), a Tafel slope (b) of 58 mV/dec (RuO2 b = 91 mV/dec), a charge transfer resistance (Rct) of 7 Ω (RuO2 Rct= 39 Ω) and a faradaic efficiency (FE) of 95% (RuO2 FE = 91%). Structural changes in the materials could be seen through a stability test in the alkaline electrolyte and chronopotentiometry over 12 h showed that the derived electrocatalysts and RuO2 have a good stability.
CLoudPricingOps: A Decision Support Framework to Explore Pricing Policies of Cloud Services
Authors: Fragiadakis George , Tsadimas Anargyros , Filiopoulou Evangelia , Kousiouris George , Michalakelis Christos , Nikolaidou Mara
Published: December 2024

To maximise the business value of the cloud the cost of cloud solutions is explored together with technical quality and performance. To enable such exploration engineering, finance and business teams collaborate in the context of FinOps, the operational framework that provides such sort of decision making. Prominent providers, such as Google and Microsoft provide FinOps to their customers, integrating cost factors when designing a cloud solution. However, different providers apply different pricing policies for their products, while these policies also adjust through time. To this end, there are numerous efforts to explore price evolution through time for different cloud products applying different decision-making methods using different data-sets. In an effort to establish a systematic approach to support decision making on alternative pricing policies for cloud services and compare them across services and providers the CloudPricingOps framework is proposed in the paper. It constitutes a decision support system that provides alternative decision making methods, such as hedonic models, time series, clustering and machine learning techniques, to deal with problems related cloud product pricing policy analysis, comparison and prediction. It also constitutes a systematic method of discrete steps to integrate additional decision making methods to deal with these problems and input datasets to be used independently of method or cloud pricing problem to solve. To discrete examples based on real-data are also presented in the paper to demonstrate the usefulness of CloudPricingOps framework for cloud engineering and business teams.
GSDMM Clustering Results Visualization Technique for Short Texts
Authors: Chigarev Boris
Published: December 2024

The aim of the study is to propose a technique for visualizing the results of short text clustering using the GSDMM algorithm, in order to facilitate the analysis of the results and the selection of the hyperparameters of this algorithm and dictionary. GSDMM is selected as the most popular short text clustering algorithm on GITHUB. The algorithm implemented by Ryan Walker on Rust was used. The program Scimago Graphica was used to create bar charts. 16486 bibliometric records on the topic “Visualization” exported from the Scopus database on November 12, 2024 served as the source of short texts. Only Author keywords are used as short texts in this paper. Results. A technique for visualizing the results of short text clustering using the GSDMM algorithm is proposed, which is based on comparing the occurrence of keywords in a given cluster and in each of the other clusters. It is shown that the cluster topics obtained using the GSDMM algorithm can be compared with the results of author keyword clustering performed using the VOSviewer program. The obtained results can be interpreted as a certain stability of cluster themes obtained by essentially different methods. The author suggests to expand the study by creating a thematic dictionary of abbreviations, analyzing the influence of the dictionary on the clustering results of the GSDMM algorithm, and extending the method of visualizing the clustering results to other short texts such as titles and abstracts.
Which Is the Best Companion of an Endothelin Receptor Antagonists in Pulmonary Hypertension, Sildenafil or Tadalafil? A Systematic Review and Meta-Analysis of Invasive Hemodynamic Data
Authors: AbdelMassih Antoine Fakhry , AlSaqqa Nada
Published: December 2024

Background:The most widely used dual therapy in Pulmonary arterial hypertension (PAH) is Endothelin receptor antagonist (ERA) alongside a phosphodiesterase inhibitor. Among multiple ERAs and PDE-5i, the commonest to be used is ERA+Sildenafil; there are suggestions that sildenafil bioavailability is reduced by ERA, this review aimed at comparing ERA+Sildenafil and ERA+Tadalafil in treatment of pulmonary arterial hypertension. Methodology:For this purpose, a literature search has been implemented with the following keywords: ERA+Sildenafil vs. ERA+Tadalafil, PAH; inclusion criteria covered clinical trials or retrospective studies comparing the two treatment regimens; and assessing invasive hemodynamics (mean pulmonary artery pressure (mPAP) and pulmonary vascular resistance (PVR)), studies were excluded if data of pulmonary hemodynamics were not provided. Results:This systematic review analyzed the results of two retrospective studies Sitbon and Grunig reports, the ERA+Sildenafil regimen comprised 160 patients vs. 62 in the ERA+Tadalafil regimen, The mPAP was significantly lower in the ERA+Tadalafil group, while a lower PVR was seen in the same group but not achieving a significant P value. Conclusion:Despite the scarcity of the included studies, this systematic review constitutes one of the few clinical evidences that Tadalafil might be best suited for dual therapy with ERA. It also highlights a gap between of literature, in the absence of clinical trials that can prove our results.
Epidemiological Dynamics and Trends of Dengue Outbreaks in São Tomé and Príncipe: A Comprehensive Retrospective Analysis (2022-2024)
Authors: Lazaro Sousa , Santana Gil Vilfrido , Ivando Carvalho Viegas de Ceita , Barreto Isaulina Neto Viegas , Sousa Maquengo Eula de Carvalho Batista , Batista de Sousa Andreza , Costa Pina Bakissy da , Traore Tieble , Zumla Alimuddin , Otshudiema John Otokoye
Published: December 2024

Dengue remains a significant public health issue globally, particularly in tropical and subtropical regions. This study analyzes the demographic and environmental factors influencing dengue transmission in São Tomé and Príncipe from 2022 to 2024. Employing a retrospective design combined with mixed methods, we investigated dengue trends in São Tomé and Príncipe. Data on dengue cases, age distribution, environmental factors (temperature, rainfall, and wind speed), and recovery time were collected from official records. Descriptive statistics were used to analyze the demographics of dengue cases, while correlation and regression analyses, along with spatial analysis, examined the relationships between environmental factors and dengue incidence. The highest incidence of dengue occurred in adolescents and young adults, with 10–19 years accounting for the largest share of cases. Dengue transmission was strongly correlated with rainfall, peaking during months with significant precipitation (May to July). The correlation between temperature and dengue cases was weaker, indicating that while temperature influences mosquito activity, rainfall is the primary driver of transmission. Recovery times varied, with a mean of 6.81 days. A dramatic spike in dengue cases in 2022 accounted for 91.9% of total cases over the three-year period, while 2023 and 2024 saw sharp declines in incidence, corresponding with reduced rainfall. The findings highlight the critical role of rainfall in dengue transmission, reinforcing the need for timely vector control measures, especially during periods of heavy precipitation. The age distribution of cases suggests targeted interventions for younger populations.
Sustainable Reinforcement of Silicone Rubber: Comparative Analysis of Biosilica from Rice Husk and Conventional Silica
Authors: Jeong Hyeon Woo , Park Kyoung Tae , Oh Su Min , Shim Sang Eun , Qian Yingjie
Published: December 2024

The objective of this study is to compare rice husk-derived silica (biosilica) synthesized via an environmentally friendly method with conventional silica (Zeosil 175) for reinforcing the mechanical properties of silicone rubber. The silanol group content of Zeosil 175 (9.45 OH/nm²) is higher than that of biosilica (7.07 OH/nm²), whereas the specific surface area of biosilica (159.52 m²/g) exceeds that of Zeosil 175 (144.90 m²/g). Silicone rubber specimens containing two types of silica nanoparticles were prepared at loading levels of 5, 10, 15, 20, 25, and 30 parts per hundred rubber to evaluate their mechanical properties and characteristics. Results indicate that silicone rubber filled with biosilica demonstrates slightly superior tensile strength at low filler contents (5.1–21.2%), attributed to its higher specific surface area. However, at higher loading levels, the mechanical properties are somewhat diminished due to the Payne effect and filler agglomeration resulting from the larger particle size of biosilica. These experimental findings offer insights into the potential utilization of rice husk-derived biosilica as an alternative to conventional silica in enhancing the properties of silicone rubber, alongside the findings of the mechanical analysis.
Sleep Quality and Quality of Life in Adults with Type 2 Diabetes in Bangladesh
Authors: Zaman Farzana , Hossain Md. Monowar , Rishad Mostafa Kader , Jubayer Mahy Md. Murtayes , Asaduzzaman Muhammad
Published: December 2024

We conducted a cross sectional study among 180 adult type-2 diabetic patients in a primary diabetic health care center in Bangladesh to assess their sleep quality and quality of life. We used the Pittsburgh Sleep Quality Index (PSQI) to assess the sleep quality and SF- 36 v2TM for the quality of life. The mean (SD) PSQI global score was 7.28 (3.06). Score of overall quality of life ranged from 914-2910 with mean (SD) score 2044.80 (512.75). 117 participants (65%) were poor sleepers (global PSQI >5) who had significantly poor functioning on all domains of the SF-36 (all p<0.001). Overall sleep quality and quality of life had significant relationship with age (p<0.001), occupation (p<0.05), duration of diabetes (p<0.001), BMI (p<0.05), diabetes complications (p<0.001), hypertension (p<0.05), coronary heart disease (p<0.001) and insulin use (p<0.05). Our study, first ever among diabetic adults in Bangladesh, suggests that Diabetes has a significant impact on an individual’s quality of life (QoL) and sleep quality. Therefore, a comprehensive nationwide study and screening of new patients for sleep problems need to be evaluated.
Density Formula in Malliavin Calculus by Using Stein’s Method and Diffusions
Authors: Park Hyun Suk
Published: December 2024

Let G be a random variable of functionals of an isonormal Gaussian process X defined on some probability space. An explicit formula for the density of G is obtained by Nourdin and Viens (2009) [Density formula and concentration inequalities with Malliavin calculus, Elec. J. of Probab., 14(78). 2287-2309]. In this paper, unlike previous studies, we will use Stein’s method for invariant measures of diffusions to obtain the density formula of G. Using this, we will show that the diffusion coefficient of a Itô diffusion with an invariant measure having a density can be expressed as in terms of operators in Malliavin calculus.
Diagnosis and Assessment of the Awareness and Readiness of Organizations to Implement the Assumptions of Industry 5.0 – Analysis of Own Research
Authors: Bartuś Kamila , Kocot Maria , Sączewska-Piotrowska Anna
Published: December 2024

The aim of this study is to assess the level of awareness and readiness of organizations to implement the assumptions of Industry 5.0, as well as to identify the benefits and challenges associated with this process. The study was conducted among Polish companies from five sectors: IT, automotive, industry, services, and banking, using a non-random sampling method and data analysis through techniques such as association rules and hierarchical clustering. The research results indicate that most organizations are familiar with the basics of the Industry 5.0 concept, but only a portion are engaged in the transformation process, which typically takes place gradually. Benefits such as improved product quality, increased production efficiency, and cost optimization are primarily recognized by companies in the IT and industrial sectors. At the same time, challenges such as the need to modernize infrastructure, ensure data security, and implementation costs remain significant barriers, particularly for small and medium-sized enterprises. The research findings have practical significance as they provide companies and decision-makers with guidance on effective planning and implementation of actions related to the implementation of Industry 5.0. The article presents an original model for implementing the assumptions of Industry 5.0, integrating technological, social, and organizational aspects, offering a comprehensive approach to transformation towards sustainable and human-centered development. The paper makes an original contribution by combining empirical analysis with the proposal of a practical model, enabling a better understanding of the technological and social transformation process in Polish organizations.
On the Effectivenes of a Common Attack to Chebyshev Chaotic Encryption Scheme
Authors: Liu Xiaoqi , Morales-Luna Guillermo
Published: December 2024

Chebyshev polynomials define a rather canonical chaotic cryptosystem and some rather strong attacks have been found. We report the numerical experiments within this cryptosystem and we point out the relevance of the length of plaintexts and the precision of the arithmetical calculations in the cryptosystem robustness.
Relaxation Character of Glass Transition in Binary Oxide Glasses Containing Lead and Boron
Authors: Mashanov Alexey A. , Ojovan Michael I. , Darmaev Migmar V.
Published: December 2024

We have examined the temperature dependence of the viscosity of lead and boron containing binary oxide glasses in the context of transition from the liquid to the vitreous state, including analysis of kinetic criterion of glass transition. Both the temperature interval determining the glass transition and the structural relaxation time were found near the glass transition temperature of PbO-SiO2, PbO-GeO2, B2O3-Bi2O3, B2O3-Li2O, B2O3-BaO, B2O3-Na2O3 glasses based on Williams-Landel-Ferry equation.
Dynamics of Built-Up Areas and Loss of Vegetation in Secondary Towns: Case Study of Sarh Town in Chad, Central Africa
Authors: Teadoum Naringué François , Tob-Ro N’Dilbé , Sorsy Melone Like , Aboudou Julien Komivi Sodjinè , Blondel Mgang-yo Asrom , Sing-Non Bourdannet Patouki , Tombar Altolnan Parfait , Hetcheli Follygan
Published: December 2024

The expansion of secondary towns in Africa, although less rapid than that of capital cities, poses significant challenges for environmental sustainability. Sarh town (Chad) is an example of this urbanisation phenomenon, which has led to a significant loss of vegetation. This research aims to analyse the dynamics of land use, focusing on the expansion of built-up areas and the loss of vegetation. The methodology used includes the analysis of Landsat images from 1994, 2003, 2013 and 2022, supplemented by field data, statistical analysis, interviews and documentary analysis. The results show that the built-up area, estimated at 806 hectares in 1994, reached 2,603 hectares in 2022, representing an annual increase of 4.1%. Moreover, the area of vegetation decreased from 759 hectares to 231 hectares, a reduction of 69%. In addition, there is a strong negative correlation (r = ̵ 0.93) between the expansion of built-up areas and the loss of vegetation. On average, the annual growth of built-up areas (4.1%) exceeds that of the population (3.33%). Field surveys reveal that this situation is due to a preference for more spacious housing, inadequate land management and limited resources for vegetation rehabilitation. These results highlight the need to adopt effective planning tools to ensure sustainable land use.