The Lagrange multiplier method for combining observations and models (i.e., the adjoint method or 4D-VAR) has been avoided or approximated when the numerical model is highly nonlinear or chaotic.This approach has been adopted primarily due to difficulties in the initialization of low-dimensional chaotic models, where Grains the search for optimal i
The specimens of the tribe Syrphini, deposited at the Hayk Mirzayans Insect Museum, were examined and 30 species identified, of which one genus and three species are newly recorded from Iran and marked by an asterisk (*).Keys to the genera and species, as well as their distribution in Iran, are provided.The species are as follows:Dasysyrphus albost
Abstract Background Orbital emphysema and pneumocephalus rarely occur without associated skull fractures.Over the past decades, a few case reports have documented compressed air injuries as a rare cause of orbital emphysema and pneumocephalus in the absence of concomitant skull fractures leading to various injuries.Case presentation We illustrate h
This study aimed to design a learning path which can help students to understand fractions based on Pendidikan Matematika Realistik Indonesia (PMRI) approach.The subject is 30 students of 4th grade of Cake Toppers PP Qodratullah Langkan.Method of this research is design research, Hypothetical Learning Trajectory (HLT) developed from learning activi
This paper analyses the causes of an incident in an aircraft propeller hub.The aluminum alloy Bath Towel Set propeller blade hub was detached from the plane bearing one of its two blades with the other one being jettisoned away.Stereoscopic examination of the fractured hub revealed that it was initially cracked by fatigue, with the crack initiating