Phytoplankton

Phytoplankton obtain energy through the process of photosynthesis and must therefore live in the well-lit surface layer (termed the euphotic zone) of an ocean, sea, lake, or other body of water. Phytoplankton account for half of all photosynthetic activity on Earth.^[2] Thus phytoplankton are responsible for much of the oxygen present in the Earth's atmosphere – half of the total amount produced by all plant life.^[3] Their cumulative energy fixation in carbon compounds (primary production) is the basis for the vast majority of oceanic and also many freshwater food webs (chemosynthesis is a notable exception). As a side note, one of the more remarkable food chains in the ocean – remarkable because of the small number of links – is that of phytoplankton fed on by krill (a type of shrimp) fed on by baleen whales.

Phytoplankton are also crucially dependent on minerals. These are primarily macronutrients such as nitrate, phosphate or silicic acid, whose availability is governed by the balance between the so-called biological pump and upwelling of deep, nutrient-rich waters. However, across large regions of the World Ocean such as the Southern Ocean, phytoplankton are also limited by the lack of the micronutrient iron. This has led to some scientists advocating iron fertilization as a means to counteract the accumulation of human-produced carbon dioxide (CO₂) in the atmosphere.^[4] Large-scale experiments have added iron (usually as salts such as iron sulphate) to the oceans to promote phytoplankton growth and draw atmospheric CO₂ into the ocean. However, controversy about manipulating the ecosystem and the efficiency of iron fertilization has slowed such experiments.^[5]

While almost all phytoplankton species are obligate photoautotrophs, there are some that are mixotrophic and other, non-pigmented species that are actually heterotrophic (the latter are often viewed as zooplankton). Of these, the best known are dinoflagellate genera such as Noctiluca and Dinophysis, that obtain organic carbon by ingesting other organisms or detrital material.

The term phytoplankton encompasses all photoautotrophic microorganisms in aquatic food webs. Phytoplankton serve as the base of the aquatic food web, providing an essential ecological function for all aquatic life. However, unlike terrestrial communities, where most autotrophs are plants, phytoplankton are a diverse group, incorporating protistan eukaryotes and both eubacterial and archaebacterial prokaryotes. There are about 5,000 species of marine phytoplankton.^[6] There is uncertainty in how such diversity has evolved in an environment where competition for only a few resources would suggest limited potential for niche differentiation.^[7]

In terms of numbers, the most important groups of phytoplankton include the diatoms, cyanobacteria and dinoflagellates, although many other groups of algae are represented. One group, the coccolithophorids, is responsible (in part) for the release of significant amounts of dimethyl sulfide (DMS) into the atmosphere. DMS is converted to sulfate and these sulfate molecules act as cloud condensation nuclei, increasing general cloud cover. In oligotrophic oceanic regions such as the Sargasso Sea or the South Pacific Gyre, phytoplankton is dominated by the small sized cells, called picoplankton,

Phytophthoras

Phytophthoras may reproduce sexually or asexually. In many species, sexual structures have never been observed, or have only been observed in laboratory matings. In homothallic species, sexual structures occur in single culture. Heterothallic species have mating strains, designated as A1 and A2. When mated, antheridia introduce gametes into oogonia, either by the oogonium passing through the antheridium (amphigyny) or by the antheridium attaching to the proximal (lower) half of the oogonium (paragyny), and the union producing oospores. Like animals, but not like most true Fungi, meiosis is gametic, and somatic nuclei are diploid. Asexual (mitotic) spore types are chlamydospores, and sporangia which produce zoospores. Chlamydospores are usually spherical and pigmented, and may have a thickened cell wall to aid in its role as a survival structure. Sporangia may be retained by the subtending hyphae (non-caducous) or be shed readily by wind or water tension (caducous) acting as dispersal structures. Also, sporangia may release zoospores, which have two unlike flagella which they use to swim towards a host plant.

Phytophthora forms: A: Sporangia. B: Zoospore. C: Chlamydospore. D: Oospor

Florence Nightingale

Florence Nightingale's most famous contribution came during the Crimean War, which became her central focus when reports began to filter back to Britain about the horrific conditions for the wounded. On 21 October 1854, she and a staff of 38 women volunteer nurses, trained by Nightingale and including her aunt Mai Smith,^[6] were sent (under the authorization of Sidney Herbert) to Turkey, about 545 km across the Black Sea from Balaklava in the Crimea, where the main British camp was based.

Nightingale arrived early in November 1854 at Selimiye Barracks in Scutari (modern-day Üsküdar in Istanbul). She and her nurses found wounded soldiers being badly cared for by overworked medical staff in the face of official indifference. Medicines were in short supply, hygiene was being neglected, and mass infections were common, many of them fatal. There was no equipment to process food for the patients.

Death rates did not drop; on the contrary, they began to rise. The death count was the highest of all hospitals in the region. During her first winter at Scutari, 4,077 soldiers died there. Ten times more soldiers died from illnesses such as typhus, typhoid, cholera and dysentery than from battle wounds. Conditions at the temporary barracks hospital were so fatal to the patients because of overcrowding and the hospital's defective sewers and lack of ventilation. A Sanitary Commission had to be sent out by the British government to Scutari in March 1855, almost six months after Florence Nightingale had arrived, and effected flushing out the sewers and improvements to ventilation.^[7] Death rates were sharply reduced. Until recently it was commonly asserted that Nightingale reduced the death rate from 42% to 2% either by making improvements in hygiene herself or by calling for the Sanitary Commission. For example the 1911 first edition of the Dictionary of National Biography made this claim, but the second edition in 2001 did not. During the war she did not recognize hygiene as the predominant cause of death, and she never claimed credit for helping to reduce the death rate.^[8]

Nightingale continued believing the death rates were due to poor nutrition and supplies and overworking of the soldiers. It was not until after she returned to Britain and began collecting evidence before the Royal Commission on the Health of the Army that she came to believe that most of the soldiers at the hospital were killed by poor living conditions. This experience influenced her later career, when she advocated sanitary living conditions as of great importance. Consequently, she reduced deaths in the army during peacetime and turned attention to the sanitary design of hospitals.

Alfred nobel

In 1888 Alfred's brother Ludwig died while visiting Cannes and a French newspaper erroneously published Alfred's obituary.^[2] It condemned him for his invention of dynamite and is said to have brought about his decision to leave a better legacy after his death.^[2][3] The obituary stated Le marchand de la mort est mort ("The merchant of death is dead")^[2] and went on to say, "Dr. Alfred Nobel, who became rich by finding ways to kill more people faster than ever before, died yesterday."^[4] On 27 November 1895, at the Swedish-Norwegian Club in Paris, Nobel signed his last will and testament and set aside the bulk of his estate to establish the Nobel Prizes, to be awarded annually without distinction of nationality. He died of a stroke on 10 December 1896 at Sanremo, Italy. After taxes and bequests to individuals, Nobel's will gave 31,225,000 Swedish kronor (equivalent to about 1.8 billion kronor or 250 million US dollars in 2008) to fund the prizes.^[5]

The first three of these prizes are awarded for eminence in physical science, in chemistry and in medical science or physiology; the fourth is for literary work "in an ideal direction" and the fifth prize is to be given to the person or society that renders the greatest service to the cause of international fraternity, in the suppression or reduction of standing armies, or in the establishment or furtherance of peace congresses. There is no prize awarded for mathematics^[6], but see Abel Prize.

The Formulation about the literary prize, "in an ideal direction" (i idealisk riktning in Swedish), is cryptic and has caused much confusion. For many years, the Swedish Academy interpreted "ideal" as "idealistic" (idealistisk) and used it as a reason not to give the prize to important but less Romantic authors, such as Henrik Ibsen and Leo Tolstoy. This interpretation has since been revised, and the prize has been awarded to, for example, Dario Fo and José Saramago, who definitely do not belong to the camp of literary idealism.^{[original research?]}

There was also quite a lot of room for interpretation by the bodies he had named for deciding on the physical sciences and chemistry prizes, given that he had not consulted them before making the will. In his one-page testament, he stipulated that the money go to discoveries or inventions in the physical sciences and to discoveries or improvements in chemistry. He had opened the door to technological awards, but had not left instructions on how to deal with the distinction between science and technology. Since the deciding bodies he had chosen were more concerned with the former, it is not surprising that the prizes went to scientists and not to engineers, technicians or other inventors. In a sense, the technological prizes announced recently by the World Technology Network (not funded by the Nobel foundation) indirectly fill this gap.

In 2001, Alfred Nobel's great-grandnephew, Peter Nobel (b. 1931), asked the Bank of Sweden to differentiate its award to economists given "in Alfred Nobel's memory" from the five other awards. This has caused much controversy whether the Bank of Sweden Prize in Economic Sciences in Memory of Alfred Nobel is actually a "Nobel Prize".

Ship

On Tuesday the 21st inst. the Continental Frigate of thirty-two guns, built at this place, ... was Launched amidst the acclamation of many thousand spectators. She is esteemed by all those who are judges that have seen her, to be one of the compleatest ships ever built in America. The unwearied diligence and care of the three Master-Builders ... and the good order and industry of the Carpenters, deserve particular notice; scarcely a single instance of a person's being in liquor, or any difference among the men in the yard during the time of her building, every man with pleasure exerting himself to the utmost: and altho' the greatest care was taken that only the best of timber was used, and the work perform'd in a most masterly manner, the whole time from her raising to the day she launched did not exceed sixty working days, and what afforded a most pleasing view (which was manifest in the countenances of the Spectators) this noble fabrick was completely to her anchors in the main channel, in less than six minutes from the time she run, without the least hurt; and what is truly remarkable, not a single person met with the least accident in launching, tho' near five hundred men were employed in and about her when run off.

USS Pivot (AM-276) launched at the Gulf Shipbuilding Company, Chickasaw, Alabama, on November 11, 1943. In the background can be seen the USS Pledge (AM-277).

It was customary for the builders to celebrate a ship launching. Rhode Island authorities, charged with overseeing construction of frigates Warren and Providence, voted the sum of fifty dollars to the master builder of each yard "to be expended in providing an entertainment for the carpenters that worked on the ships." Five pounds was spent for lime juice for the launching festivities of frigate Delaware at Philadelphia, Pennsylvania, suggesting that the "entertainment" included a potent punch with lime juice as an ingredient.

No mention of christening a Continental Navy ship during the American Revolution has come to light. The first ships of the Continental Navy, Alfred, Cabot, Andrew Doria, and Columbus, were former merchantmen and their names were assigned during conversion and outfitting. Later, when Congress authorized the construction of thirteen frigates, no names were assigned until after four had launched.

The first description we have of an American warship christening is that of Constitution, famous "Old Ironsides", at Boston, October 21, 1797. Her sponsor, Captain James Sever, USN, stood on the weather deck at the bow. "At fifteen minutes after twelve she commenced a movement into the water with such steadiness, majesty and exactness as to fill every heart with sensations of joy and delight." As Constitution ran out, Captain Sever broke a bottle of fine old madeira over the heel of the bowsprit.

Frigate President had an interesting launching, April 10, 1800, at New York:

Was launched yesterday morning, at ten o'clock, in the presence of perhaps as great a concourse of people as ever assembled in this city on any occasion. At nine, captain Ten-Eyck's company of artillery..., accompanied by the uniform volunteer companies of the sixth regiment and the corps of riflemen, marched in procession ... and took their station alongside the frigate. Everything being prepared, and the most profound silence prevailing, ... At a given signal she glided into the waters, a sublime spectacle of gracefulnes and grandeur. Immediately on touching the water federal salutes were fired from the sloop of war Portsmouth, the revenue cutter Jay and the Aspasia, Indiaman. These were returned by the uniform companies on shore, who fired a feu-de-joye, and marched off the ground to the battery ... and were dismissed.

As the 19th century progressed, American ship launchings continued to be festive occasions, but with no set ritual except that the sponsor(s) used some "christening fluid" as the ship received her name.

Sloop-of-war Concord, launched in 1827, was "christened by a young lady of Portsmouth." This is the first known instance of a woman sponsoring a United States Navy vessel. Unfortunately, the contemporary account does not name this pioneer female sponsor. The first identified woman sponsor was Miss Lavinia Fanning Watson, daughter of a prominent Philadelphian. She broke a bottle of wine and water over the bow of sloop-of-war Germantown at Philadelphia Navy Yard on August 22, 1846.

Women as sponsors became increasingly the rule, but not universally so. As sloop-of-war Plymouth "glided along the inclined plane," in 1846, "two young sailors, one stationed at each side of her head, anointed her with bottles, and named her as she left her cradle for the deep." As late as 1898, the torpedo boat MacKenzie was christened by the son of the builder.

Although wine is the traditional "christening fluid," numerous other liquids have been used. Princeton and Raritan were sent on their way in 1843 with whisky. Seven years later, "a bottle of best brandy was broken over the bow of steam sloop San Jacinto." Steam frigate Merrimack, who would earn her place in naval history as Confederate States of America ironclad Virginia, was baptized with water from the Merrimack River. Admiral David Farragut's famous American Civil War flagship, steam sloop Hartford, was christened by three sponsors—two young ladies broke bottles of Connecticut River and Hartford, Connecticut spring water, while the third sponsor, a naval lieutenant, completed the ceremony with a bottle of sea water.

Champagne, perhaps because of its elegance as the aristocrat of wines, came into popular use as a "christening fluid" as the 19th century closed. A granddaughter of Secretary of the Navy Benjamin F. Tracy wet the bow of Maine, the Navy's first steel battleship, with champagne at the New York Navy Yard, November 18, 1890. The effects of national prohibition on alcoholic beverages were reflected to some extent in ship christenings. Cruisers Pensacola and Houston, for example, were christened with water; the submarine V-6 with cider. However, battleship California appropriately received her name with California wine in 1919. Champagne returned, but for the occasion only, in 1922 for the launch of light cruiser Trenton. Rigid naval airships Los Angeles, Shenandoah, Akron, and Macon, built during the 1920s and early 1930s, were carried on the Naval Vessel Register, and formally commissioned.

Former First Lady Nancy Reagan christens the USS Ronald Reagan (CVN-76), March 4, 2001

The earliest First Lady of the United States to act as sponsor was Grace Coolidge who christened the airship Los Angeles. When Lou Henry Hoover christened Akron in 1931, the customary bottle was not used. Instead, the First Lady pulled a cord which opened a hatch in the airship's towering nose to release a flock of pigeons.

Thousands of ships of every description, the concerted effort of a mobilized American industry, came off the ways during World War II. The historic christening-launching ceremonies continued, but travel restrictions, other wartime considerations, and sheer numbers dictated that such occasions be less elaborate than those in the years before the nation was engaged in desperate worldwide combat.

In recent history, all U. S. Navy sponsors have been female. In addition to the ceremonial breaking of a champagne bottle on the bow, the sponsor remains in contact with the ship's crew and is involved in special events such as homecomings.^[4]

(This article includes material from "Ships of the United States Navy: Christening, Launching and Commissioning, Second Edition," which was prepared for and published by the Naval History Division of the Department of the Navy, Washington, D.C., 1975, and therefore is in the public domain as federal government work).

UNIVERSITAS TOKYO

General Library

The Experimental Tank

[edit] Sanshiro Pond

Sanshiro Pond detail, Tokyo University's Hongō campus.

Sanshiro Pond (三四郎池, Sanshirō ike^?), in the heart of the university's Hongo campus, dates to 1615. After the fall of the Osaka Castle, the shogun gave this pond and its surrounding garden to Maeda Toshitsune. With further development of the garden by Maeda Tsunanori, it became known as one of the most beautiful gardens in Edo (now Tokyo), with the traditional eight landscapes and eight borders, and known for originality in artificial pond, hills, and pavilions. It was at that time known as Ikutoku-en (Garden of Teaching Virtue). The pond's contours are in the shape of the character kokoro or shin (heart), and thus its official name is Ikutoku-en Shinjiike. It has been commonly called Sanshiro Pond after the title of Natsume Sōseki's novel Sanshiro.

[edit] Komaba Campus

Main article: University of Tokyo, Komaba Campus

Komaba Campus detail, Tokyo University's Komaba campus.

One of the five campuses of the University of Tokyo, the Komaba Campus is home to the College of Arts and Sciences, the Graduate School of Arts and Sciences, the Graduate School of Mathematical Sciences, and a number of advanced research facilities and campus services. This is the campus where all the freshmen and sophomores of the University of Tokyo spend their college life. The University of Tokyo is the only university in Japan which has a system of two years of general education before students can choose and move on to special fields of study. The Komaba Campus is the cornerstone of general education, and was designated as the "center of excellence" for three new areas of research by the Ministry of Education and Science. There are currently over 7,000 students (freshmen and sophomores) enrolled in the general education courses, about 450 students (juniors and seniors) pursuing their specialties in the College of Arts and Sciences, and 1,400 graduate students in the advanced study.

[edit] Kashiwa Campus

gryffindor

ryffindor values courage, bravery, daring, nerve and chivalry. Its mascot is the lion, and its colours are scarlet and gold. The Head of this house is the Transfiguration teacher, Minerva McGonagall, and the house ghost is Sir Nicholas de Mimsy-Porpington, more commonly known as Nearly Headless Nick. According to Rowling, Gryffindor corresponds roughly to the element of fire. The founder of the house is Godric Gryffindor.

The Gryffindor common room is located in one of the castle's highest towers, the entrance to which is located on the seventh floor in the east wing of the castle and is guarded by a painting of The Fat Lady, who is garbed in a pink dress. She permits entry only after being given the correct password, as was distinguished in the third book, when Sirius Black tried forcing entry into the tower, only to be blocked by The Fat Lady after he could not give the correct password. In the first book, Neville Longbottom tends to forget the password and must wait near the painting until other Gryffindors arrive to open the way.^[20]