The Life and Works of Henry Wadsworth Longfellow
Henry Wadsworth Longfellow: A Life in Poetry
Early Life and Education
February 27, 1807: Henry Wadsworth Longfellow born
1813: Begins attending Portland Academy
1820: First published poem, “The Battle of Lovell’s Pond,” appears in the Portland Gazette
1821: Enrolled at Bowdoin College in Brunswick, ME. Stays in Portland for the first year of studies
1825: Graduates from Bowdoin College
Travels, Teaching, and Marriage
1826-1829: Travels and studies in Europe
1829-1835: Teaches at Bowdoin College
1831: Marries
Read MorePhase Transformations and Material Properties in Metallurgy
An Equilibrium Reaction: Monotectic
A monotectic reaction is one in which a molten solution, upon cooling, becomes immiscible. This process can lead to material defects like cracking.
Portevin Rules
- In each balancing zone, only two phases can exist at most.
- Except for the liquid phase region, all other single-phase regions are occupied by solid phases.
- When crossing a line in the phase diagram, the number of phases varies by one.
- Any region bounded by a horizontal line contains two phases.
- Two-phase regions
Stellar Spectroscopy and Evolution: A Comprehensive Guide
Chapter 8: Spectroscopy of Stars
- What does ‘luminosity’ mean?
Luminosity refers to the total energy radiated by a star per second. The larger a star’s surface area, the greater its luminosity. - What is the equation relating apparent brightness to luminosity? Which tells us more about a star: its luminosity or its brightness?
The equation is L = b/d², where L is luminosity, b is apparent brightness, and d is distance. Luminosity tells us more about a star’s intrinsic properties. To determine a star’s
A Comprehensive Guide to Polymer Modified Mortars and Epoxy Systems
MORTARS WITH POLYMERS
Cement mortars with an emulsion of an acrylic polymer or synthetic latex added to them are known as polymer-modified mortars. The polymers currently used in the manufacture of these emulsions are of three types:
- Acrylics
- Styrene-butadiene rubber (SBR)
- Polyvinyl acetate (PVA)
These polymers are suitable for permanent wet environments. Polymer emulsions have two forms of application:
GROUT ADHESIVE
Used as a bonding bridge in fresh mortar and concrete or mortar bases for masonry. To
Read MoreChromatic Lighting and Environment: A Comprehensive Guide
Chromatic Lighting and Environment
To view objects, the wavelengths should be kept within the range of 380nm and 780nm. This is the wavelength range necessary to be perceived as light by the human eye and fall within the absolute threshold of visual perception.
In industrial hygiene studies, lighting highlights risks as a Physical Agent Risk. This is because it corresponds to a form of energy that propagates in the atmosphere and reaches humans. It is necessary to carry out relevant activities within
Read MoreUnderstanding Wave Phenomena: Huygens’ Principle, Reflection, Refraction, Polarization, Diffraction, and Interference
Block 5: Wave Phenomena
5.1. Huygens’ Principle
Waves exhibit unique qualities and phenomena not observed in other physical actions. These phenomena stem from the nature of wave propagation, which relies on the movement of successive wavefronts (a wavefront is a line connecting points with the same vibrational state). In the late 17th century, Dutch scientist Christiaan Huygens developed a geometrical method to predict the position of a wavefront at a specific time, given its previous position. This
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