Nurse log

A nurse log is a fallen tree which, as it decays, provides ecological facilitation to seedlings. Broader definitions include providing shade or support to other plants. Some of the advantages a nurse log offers to a seedling (as enumerated by Daniel Mathews) are: water, moss thickness, leaf litter, mycorrhizae, disease protection, nutrients, and sunlight. Recent research into soil pathogens suggests that in some forest communities, pathogens hostile to a particular tree species appear to gather in the vicinity of that species, and to a degree inhibit seedling growth. Nurse logs may therefore provide some measure of protection from these pathogens, thus promoting greater seedling survivorship.

Occurrence

Various mechanical and biological processes contribute to the breakdown of lignin in fallen trees, resulting in the formation of niches of increasing size, which tend to fill with forest litter such as soil from spring floods, needles, moss, mushrooms and other flora. Mosses also can cover the outside of a log, hastening its decay and supporting other species as rooting media and by retaining water. Small animals such as various squirrels often perch or roost on nurse logs, adding to the litter by food debris and scat. The decay of this detritus contributes to the formation of a rich humus that provides a seedbed and adequate conditions for germination.

Peggy Anderson

Peggy Anderson (July 14, 1938 – January 17, 2016) was an American author and journalist, best known for her 1979 work Nurse, which profiled the work of a nurse and sold millions of copies.

Anderson was born in Oak Park, Illinois, in 1938, to Catherine Anderson, a nurse, and her husband Wilbert Anderson. She graduated from Augustana College in Rock Island, Illinois, and then joined the Peace Corps. While with the Peace Corps, she taught English for two years in the early 1960s in Togo. After her time in the Peace Corps, she worked as a reporter at The Washington Monthly and The Philadelphia Inquirer (from 1969-1973).

She wrote three well-known books: The Daughters (1972), about the Daughters of the American Revolution; Nurse (1979); and Children's Hospital (1985).

Nurse was a major best-seller. The book was an account of the working life of a nurse, based on an pseudonymized series of interviews with a 27-year-old nurse named Philadelphia. The book was made into a movie and a TV series starring Michael Learned, which won an Emmy award. It was suggested that she title the book "Scar Wars" (playing on the recent popularity of the film "Star Wars"), but Anderson stuck with the less sensationalistic title Nurse. The nurse, nicknamed "Mary Benjamin" in the book, at the time insisted on her anonymity, and "steadfastly protected her identity". She was later identified as Mary Fish and became a life-long friend of Anderson's. For the book, Fish received $2,000 and 5% of profits from the book, for meeting with Anderson for 60 interviews, of two to six hours each.

Nurse (2015 TV series)

Nurse is a BBC sitcom broadcast on BBC Two, written by Paul Whitehouse, David Cummings and Esther Coles. It is about a community mental health nurse (Esther Coles) who visits her patients in their homes and is based on the sessions she has with these patients (most of whom are played by Paul Whitehouse), other actors who play patients include Cecilia Noble, Rosie Cavaliero, Simon Day, Jason Maza, Vilma Hollingbery, Jo Enright and Sue Elliot Nichols. The first series started broadcasting on 10 March 2015 and finished broadcasting on 31 March 2015.

References

External links

Nurse (disambiguation)

A nurse is a healthcare professional.

Nurse or nurses may also refer to:

Occupations and activities

Entertainment and literature

People

Log

Log, LOG, or LoG may refer to:

Recordkeeping

Places

Russia

Slovenia

Data logger

A data logger (also datalogger or data recorder) is an electronic device that records data over time or in relation to location either with a built in instrument or sensor or via external instruments and sensors. Increasingly, but not entirely, they are based on a digital processor (or computer). They generally are small, battery powered, portable, and equipped with a microprocessor, internal memory for data storage, and sensors. Some data loggers interface with a personal computer, and use software to activate the data logger and view and analyze the collected data, while others have a local interface device (keypad, LCD) and can be used as a stand-alone device.

Data loggers vary between general purpose types for a range of measurement applications to very specific devices for measuring in one environment or application type only. It is common for general purpose types to be programmable; however, many remain as static machines with only a limited number or no changeable parameters. Electronic data loggers have replaced chart recorders in many applications.

Logarithm

In mathematics, the logarithm is the inverse operation to exponentiation. That means the logarithm of a number is the exponent to which another fixed value, the base, must be raised to produce that number. In simple cases the logarithm counts repeated multiplication. For example, the base 10 logarithm of 1000 is 3, as 10 to the power 3 is 1000 (1000 = 10 × 10 × 10 = 10³); the multiplication is repeated three times. More generally, exponentiation allows any positive real number to be raised to any real power, always producing a positive result, so the logarithm can be calculated for any two positive real numbers b and x where b is not equal to 1. The logarithm of x to base b, denoted log_b(x), is the unique real number y such that

For example, as 64 = 2⁶, we have

The logarithm to base 10 (that is b = 10) is called the common logarithm and has many applications in science and engineering. The natural logarithm has the number e (≈ 2.718) as its base; its use is widespread in mathematics and physics, because of its simpler derivative. The binary logarithm uses base 2 (that is b = 2) and is commonly used in computer science.