In this paper, we focus on the link density in random geometric graphs (RGGs) with a distance-based connection function. After deriving the link density in D dimensions, we focus on the two-dimensional (2D) and three-dimensional (3D) space and show that the link density is accurately approximated by the Fréchet distribution, for any rectangular space. We derive expressions, in terms of the link density, for the minimum number of nodes needed in the 2D and 3D spaces to ensure network connectivity. These results provide first-order estimates for, e.g., a swarm of drones to provide coverage in a disaster or crowded area.
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http://dx.doi.org/10.1103/PhysRevE.106.024301 | DOI Listing |
Sisli Etfal Hastan Tip Bul
December 2024
Department of Pharmacognosy and Medicinal Plants, University of Mosul, College of Pharmacy, Mosul, Iraq.
Objectives: Adipsin and leptin are adipokines that link adipose tissue dysfunction and increased fat accumulation to obesity-related metabolic disorders. This study aimed to assess the effects of sitagliptin/metformin versus metformin monotherapy on the levels of adipsin, leptin, and lipid profile in type 2 diabetic patients.
Methods: This comparative case-control study included 120 participants divided into four groups: healthy participants, newly diagnosed type 2 diabetic patients, metformin-treated patients, and sitagliptin/metformin-treated patients.
Clin Res Cardiol
January 2025
Department of Cardiology, Medical School Theodor Fontane, University Hospital Ruppin-Brandenburg, Neuruppin, Germany.
Background: Heart failure (HF) is a heterogeneous clinical syndrome affecting a growing global population. Due to the high incidence of cardiovascular risk factors, a large proportion of the Western population is at risk for heart failure. Oxidative stress and inflammation play a crucial role in the pathophysiology of heart failure with preserved ejection fraction (HFpEF).
View Article and Find Full Text PDFJ Periodontol
January 2025
Key Laboratory of Shaanxi Province for Craniofacial Precision Medicine Research, College of Stomatology, Xi'an Jiaotong University, Xi'an, Shaanxi, China.
Background: Previous research has indicated a potential connection between smoking and tooth loss, but it remains unclear how the metabolites of nicotine, cotinine (COT) and trans-3'-hydroxycotinine (HC), and the nicotine metabolite ratio (NMR) affect the occurrence and progress of tooth loss. In this study, we aimed to investigate the relationship between tooth loss and smoking metabolites, then verify how the systemic immunoinflammatory index (SII) or monocyte to high-density lipoprotein cholesterol ratio (MHR) levels mediate this process.
Methods: The cross-sectional study data were collected from the National Health and Nutrition Examination Survey (NHANES).
Cureus
December 2024
Optics and Optometry Division, Investigative Techniques in Optometry Research Group, Department of Biomedical Sciences, University of West Attica, Athens, GRC.
Diabetic retinopathy (DR) is a leading cause of vision impairment and blindness globally, particularly among working-age adults. As the prevalence of diabetes continues to rise, understanding factors that influence DR development and progression is increasingly important. Recent studies suggest a protective association between a longer axial length (AL) of the eye and the risk of DR, particularly in myopic individuals.
View Article and Find Full Text PDFNutr Metab Cardiovasc Dis
December 2024
Department of Radiology, Innsbruck Medical University, Innsbruck, Austria. Electronic address:
Background And Aims: The interaction of serum uric acid (SUA) with atherogenesis is incompletely understood. Aim of our study was to investigate the association of SUA levels with coronary plaque composition including high-risk-plaque (HRP) features by coronary computed tomography angiography (CTA) and for the prediction of major adverse cardiac events (MACE).
Methods And Results: 1242 patients (age 66.
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