Results 111 to 120 of about 7,201 (251)
A unified mathematical model of the geometry of the Giza pyramid complex
Настоящая работа представляет эмпирическую математическую модель, которая описывает линейные размеры четырёх объектов комплекса пирамид Гизы (Египет) с высокой точностью. Модель охватывает пирамиды Хеопса, Хефрена, Микерина и восточную площадку у пирамиды Микерина.
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Advanced Intelligent Systems, EarlyView.An embodied codesign framework for smart footwear is presented, jointly tuning lattice mechanics and sensing for personalized plantar pressure monitoring. By integrating pneumatic sensing within 3D‐printed lattice soles, the system achieves accurate real‐time centre‐of‐pressure tracking with reduced sensor count and energy demand, demonstrating how ...
Fengyu Zhong +3 more
wiley +1 more source
T‐Shaped Stibenium(III) Cation: Hydrostibination Without Sb─H Bond
Angewandte Chemie, EarlyView.A cationic, structurally constrained stibenium platform mediates anti‐Markovnikov hydrostibination of alkenes via element–ligand cooperativity (ELC), thereby bypassing the need for weak Sb─H bonds. ABSTRACT The hydrostibination of alkenes represents a largely underdeveloped transformation, owing to the intrinsic lability of the required Sb─H reagents ...
Ekta Nag +4 more
wiley +2 more sources
Generalized Analytical Geometry and Paper Models of Pyramidal and Polyhedral Forms
, 2019 In this work, the closed-form analytical expressions were developed for determining the significant geometric parameters of pyramidal flat containers with regular polygonal bases, regular right pyramids, and associated polyhedral forms. The formulation is based on HCR’s Theorem of Rotation and its corollary, which provide explicit relations for the V ...
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Angewandte Chemie, EarlyView.N‐heterocyclic carbenes (NHCs) function as “molecular scissors,” cleaving otherwise inert Sb═Sb bonds in distibenes to generate monomeric, zwitterionic stibinide species. These intermediates act as efficient stibinidene transfer reagents, granting access to a rare terminal cobalt–stibinidene complex.
Daniel Meleschko +7 more
wiley +2 more sources
Optimizing Surface Area of Structured Packing via Advanced 3D Printing Techniques
Chemical Engineering TransactionsThis study focuses on the production of single rectangular sheets, representing the repetitive unit of a structured packing but simplified to a flat geometry without holes or corrugations and explores the use of 3D foam-printing to improve their texture ...
Stefano Giovanni Acierno +6 more
doaj
Prismatic-Pyramidal Decomposition: A Canonical Foundation for Polyhedral Geometry
This paper introduces the Prismatic-Pyramidal Decomposition (PPD) as a novel canonical method for representing polyhedra. Traditional polyhedral decomposition techniques, such as triangulation or convex decomposition, often lack uniqueness or fail to preserve essential structural symmetries.
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Pyramids: An efficient computational geometry-based approach for timing-driven placement [PDF]
2008 IEEE/ACM International Conference on Computer-Aided Design, 2008 Tao Luo 0002 +5 more
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This research investigates the geometric and numerical structures of the Egyptian pyramids, focusing on the patterns of the numbers 3, 6, and 9. Two table-based models were designed: the Four-Triangle Model and the English Flag Model. In the Four-Triangle Model, gradual reduction of numbers and symmetrical placement of the number 6 relative to the ...
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Golden Geometry Revealed: The Fibonacci Link Between the Pleiades and the Bosnian Pyramids
International Journal of Aerospace Science, Technology and EngineeringThis study presents groundbreaking geometric and astronomical correlations between the Pleiades star cluster and the spatial layout of the Bosnian Pyramid Complex. Drawing on LiDAR-based topographic data, high-resolution geodetic surveys, and comparative archaeoastronomical methods, the research examines straight-line alignments, triangular ...
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