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Articles 144781 - 144789 of 144789
Full-Text Articles in Physical Sciences and Mathematics
De Linea Brevissima In Superficie Quacunque Duo Quaelibet Puncta Iungente, Leonhard Euler
De Linea Brevissima In Superficie Quacunque Duo Quaelibet Puncta Iungente, Leonhard Euler
All Works by Eneström Number
This article arose out of a homework assignment that Euler did for Johann Bernoulli. Bernoulli asked Euler to find the shortest line between two points on a surface. This work provided some of the first analytical foundations for the calculus of variations.
Dissertatio De Novo Quodam Curvarum Tautochronarum Genere, Leonhard Euler
Dissertatio De Novo Quodam Curvarum Tautochronarum Genere, Leonhard Euler
All Works by Eneström Number
According to Eneström: "Intrigued by a clock invented by D. Sully, Euler busied himself with the construction of curves which cause a pendulum to swing isochronally."
Problematis Traiectoriarum Reciprocarum Solutio, Leonhard Euler
Problematis Traiectoriarum Reciprocarum Solutio, Leonhard Euler
All Works by Eneström Number
This article contains Euler's first published use of complex numbers and a many-axis geometric construction. Euler also defines even functions f(x) as those for which f(x) = f(-x), perhaps the first use of this term.
Meditationes Super Problemate Nautico, Quod Illustrissima Regia Parisiensis Academia Scientiarum Proposuit, Leonhard Euler
Meditationes Super Problemate Nautico, Quod Illustrissima Regia Parisiensis Academia Scientiarum Proposuit, Leonhard Euler
All Works by Eneström Number
No abstract provided.
Dissertatio Physica De Sono, Leonhard Euler
Dissertatio Physica De Sono, Leonhard Euler
All Works by Eneström Number
Euler first explains his theory of what makes up the atmosphere; the basis of his theory lies in the theory of elasticity of the teacher he had before Johann Bernoulli. He also states without proof a formula for the speed of propagation and derives from it numerical values of the correct order of magnitude for air.
Methodus Inveniendi Traiectorias Reciprocas Algebraicas, Leonhard Euler
Methodus Inveniendi Traiectorias Reciprocas Algebraicas, Leonhard Euler
All Works by Eneström Number
No abstract provided.
Constructio Linearum Isochronarum In Medio Quocunque Resistente, Leonhard Euler
Constructio Linearum Isochronarum In Medio Quocunque Resistente, Leonhard Euler
All Works by Eneström Number
No abstract provided.
The Aerosphere As A Network Connector Of Organisms And Their Diseases, Jeremy D. Ross, Eli S. Bridge, Diann J. Prosser, John Y. Takekawa
The Aerosphere As A Network Connector Of Organisms And Their Diseases, Jeremy D. Ross, Eli S. Bridge, Diann J. Prosser, John Y. Takekawa
United States Geological Survey: Staff Publications
Aeroecological processes, especially powered flight of animals, can rapidly connect biological communities across the globe. This can have profound consequences for evolutionary diversification, energy and nutrient transfers, and the spread of infectious diseases. The latter is of particular consequence for human populations, since migratory birds are known to host diseases which have a history of transmission into domestic poultry or even jumping to human hosts. In this chapter, we present a scenario under which a highly pathogenic avian influenza (HPAI) strain enters North America from East Asia via postmolting waterfowl migration. We use an agent-based model (ABM) to simulate the …
Wearable Electrochemical Sensors For Monitoring Performance Athletes, Kevin J. Fraser, Vincenzo F. Curtin, Shirley Coyle, Benjamin Schazmann, Robert Byrne, Fernando Benito-Lopez, Roisin M. Owens, George C. Malliaras, Dermot Diamond
Wearable Electrochemical Sensors For Monitoring Performance Athletes, Kevin J. Fraser, Vincenzo F. Curtin, Shirley Coyle, Benjamin Schazmann, Robert Byrne, Fernando Benito-Lopez, Roisin M. Owens, George C. Malliaras, Dermot Diamond
Conference Papers
Nowadays, wearable sensors such as heart rate monitors and pedometers are in common use. The use of wearable systems such as these for personalized exercise regimes for health and rehabilitation is particularly interesting. In particular, the true potential of wearable chemical sensors, which for the real-time ambulatory monitoring of bodily fluids such as tears, sweat, urine and blood has not been realized. Here we present a brief introduction into the fields of ionogels and organic electrochemical transistors, and in particular, the concept of an OECT transistor incorporated into a sticking-plaster, along with a printable “ionogel” to provide a wearable biosensor …