Monday, June 30, 2008

laser

A laser treatment that wipes out drug-resistant bacterial infections may one day help doctors tackle the growing problem of superbugs, British researchers said on Tuesday. http://louis-j-sheehaN.NET

Laboratory experiments showed that a laser-activated dye widely used for medical diagnosis produces a number of bacteria-killing chemicals, Michael Wilson of University College London and colleagues said. http://louis-j-sheehaN.NET

It could be used for spot treatment of skin infections and save the use of infused or oral antibiotics for more serious cases, they wrote in the journal BioMed Central Microbiology.

Their study showed indocyanine green dye killed a wide range of bacteria including Staphyloccus aureus, Streptococcus pyogenes and Pseudomonas aeruginosa whan activated by a near-infrared laser.

Methicillin-resistant Staphyloccus aureus, or MRSA, infections can range from boils to more severe infections of the bloodstream, lungs and surgical sites. Most cases are associated with hospitals, nursing homes or other health care facilities.

The superbug is a growing problem worldwide and can cause life-threatening and disfiguring infections and can often only be treated with expensive, intravenous antibiotics.

This new approach using a dye safe for humans could save lives and get people out of the hospital more quickly -- and cheaply, the researchers said.

"The growing resistance to conventional antibiotics among organisms that infect wounds and burns makes such infections difficult to treat," Wilson's team wrote.

The treatment is promising because the activated dye targets both the bacteria's DNA and membrane, a two-pronged attack making resistance unlikely to develop, even after repeated use, they said.

The researchers said they conducted their experiments using bacteria grown in a lab so the next step is testing the laser on mice before starting human trials.

Saturday, June 21, 2008

zhou

In a society where news is restricted, much weight is put on stories which cannot be verified. It was widely believed that at the Geneva Conference of 1954 U.S. Secretary of State John Foster Dulles snubbed Zhou by publicly brushing past his outstretched hand. http://louis1j1sheehan1.blogspot.comWhether the incident actually happened or not, President Nixon clearly believed that it had. Therefore, when he descended from Air Force One in Beijing in January 1972, he ostentatiously and respectfully held out his hand to Zhou, who appreciated the symbolism. [10]

The clash with Russia created a number of these stories. http://louis1j1sheehan1.blogspot.comOne story had it that Zhou met Premier Nikita Khrushchev outside a meeting hall where each had denounced the other. Khrushchev, who was said to be jealous of Zhou’s cosmopolitan skills, remarked to Zhou “it’s interesting, isn’t it. I’m of working class origin while your family were landlords.” Zhou quickly replied “Yes, and we each betrayed our class!” [11]

Another such doubtful but widespread story had it that at another such encounter Khrushchev shook Zhou’s hand, then pulled out his handkerchief and wiped his hands. Zhou then pulled out his handkerchief, wiped his hands, and put the handkerchief in the nearest wastebasket. [12] This is especially interesting since apparently Richard Nixon told a similar story. He recalled that in 1954 Undersecretary of State, Walter B. Smith did not want to "break... discipline" but also did not want to slight the Chinese blatantly. Therefore, Smith held a cup of coffee in his right hand when shaking hands with Zhou. Zhou took out a white handkerchief, wiped his hand and threw the handkerchief into the garbage.

[edit]

Friday, June 13, 2008

italian Louis J. Sheehan, Esquire

Eighth Army plans for 21 November were for 70 Division to break out from Tobruk and cut the German lines of communication and supply to the troops on the border to the southeast. At the same time 7th Armoured would advance from Sidi Rezegh to link with them and roll up the Axis positions around Tobruk. Meanwhile, XIII Corps' New Zealand Division would take advantage of the receding threat from 21st and 15th Panzer and advance 30 miles (48 km) northeast to the Sidi Azeiz area, overlooking the Axis defenses at Bardia. http://Louis-j-sheehan-esquire.us


The strength of 70th Division's attack surprised their opponents, Rommel having underestimated the garrison's size and particularly its armoured strength. Fighting was intense as the 2nd Battalion, Black Watch advanced to capture a series of prepared strongpoints. By mid afternoon they had advanced some 3.5 miles (5.6 km) towards Ed Duda on the main supply road when they paused as it became clear that 7th Armoured would not link up.[7] A German account of the action of the 70th Division is given by Generalmajor Alfred Toppe of the German Wehrmacht:

A strong attack supported by fifty infantry tanks, was made from the southeast section of the fortress of Tobruk. The enemy broke through the encirclement front, penetrated across the main highway and and destroyed a good part of the Bologna Division. A counterattack by elements of 21st Panzer Division succeeded in restoring the situation.[8]

In summing up the experience of the 2nd Battalion the Black Watch in the attack, the Official History of New Zealand in the Second World War wrote that "The superlative élan of the Black Watch in the attack had been equalled by the remarkable persistence of the defence in the face of formidable tank-and-infantry pressure."[9]

7th Armoured had planned its attack northward to Tobruk to start at 08.30 on 21 November. However, at 07.45 patrols reported the arrival from the southeast of a mass of enemy armour, some 200 tanks in all. 7th Armoured Brigade, together with a battery of field artillery turned to meet this threat leaving the four companies of infantry and the artillery of the Support Group to carry through the attack to the north in anticipation of being reinforced by 5th South African Infantry Brigade which had been detached from the South African Division at Bir el Gubi facing the Ariete Division and was heading north to join them.[10]

Without armoured support the northward attack by the Support Group failed and by the end of the day, 7th Armoured Brigade had lost all but 28 of its 160 tanks and were relying by that time mainly on the artillery of the Support Group to hold the enemy at arm's length. The South African brigade meanwhile were dug in southeast of Bir el Haiad but had the German armour between them and Sidi Rezegh. However, by the evening of 21 November 4th Armoured Brigade was 8 miles (13 km) south east of Sidi Rezegh and 22nd Armoured Brigade were in contact with the German armour at Bir el Haiad, some 12 miles (19 km) southwest of Sidi Rezegh.[11]

[edit] 7th Armoured Division defeated at Sidi Rezegh

Overnight Rommel once again split his forces with 21st Panzer taking up a defensive position alongside the Afrika Division between Sidi Rezegh and Tobruk and 15th Panzer moving 15 miles (24 km) west to Gasr el Arid to prepare for a battle of manoeuvre which General Cruewell believed would favour the Afrika Korps. This presented a clear opportunity for a breakthrough to Tobruk with the whole of 7th Armoured Division concentrated and facing only the weakened 21st Panzer. However, XXX Corps commander Norrie, aware that 7th Armoured division was down to 200 tanks decided on caution. Instead, in the early afternoon Rommel attacked Sidi Rezegh with 21st Panzer and captured the airfield. Fighting was desperate and gallant: for his actions during these two days of fighting Brigadier Jock Campbell, commanding 7th Support Group was awarded the Victoria Cross. However, 21st Panzer, despite being considerably weaker in armour, proved superior in its combined arms tactics, pushing 7th Armoured Division back with a further 50 tanks lost (mainly from 22nd Brigade).[12]

The fighting at Sidi Rezegh had continued through 22 November, with South African Division's 5th Brigade by that time engaged to the south of the airfield. An attempt to recapture it failed and the Axis counter-offensive began to gain momentum. 7th Armoured Brigade had been withdrawn with all but four of their 150 tanks out of commission or destroyed.[13] In four days the Eighth Army had lost 530 tanks against Axis losses of about 100. http://Louis-j-sheehan-esquire.us


In the meantime the Italian forces had succeeded in repulsing a strong thrust from Tobruk aimed at penetrating into the area of Sidi Rezegh, as a German narrative recorded:[15]

"After a sudden artillery concentration the garrison of Fortress Tobruk, supported by sixty tanks, made an attack on the direction of Bel Hamid at noon, intending at long last unite with the main offense group. The Italian siege front around the fortress tried to offer a defense in the confusion but was forced to relinquish numerous strong points in the encirclement front about Bir Bu Assaten to superior enemy forces. The Italian "Pavia" Division was committed for a counterattack and managed to seal off the enemy breakthrough."

Friday, June 6, 2008

Oberth Louis J. Sheehan, Esquire 211223

Hermann Julius Oberth (June 25, 1894December 28, 1989) was an Austro-Hungarian-born, German (Transylvanian Saxon) physicist, and, along with the Russian Konstantin Tsiolkovsky and the American Robert Goddard, one of the founding fathers of rocketry and astronautics. The three were never active collaborators: instead, their parallel achievements occurred independently of one another.

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[edit] Early life

Oberth was born to a Saxon family in the Transylvanian city of Schäßburg (Romanian Sighişoara, Romania). By his own account and that of many others, around the age of 11 Oberth became fascinated with the field in which he was to make his mark through the writings of Jules Verne, especially From the Earth to the Moon and Around the Moon, re-reading them to the point of memorization. Influenced by Verne's books and ideas, Oberth constructed his first model rocket as a school student of 14. In his youthful experiments, he arrived independently at the concept of the multistage rocket, but lacked, at the time, the resources to pursue his idea on any but a theoretical level.

In 1912, Oberth undertook the study of medicine in Munich but at the outbreak of World War I he was drafted in an Imperial German infantry battalion and sent to the Eastern Front; in 1915 he was moved to a medical unit in a hospital in Sighişoara.[1] Here he initially conducted a series of experiments concerning weightlessness and later resumed his rocket designs. By 1917, he showed what his studies were about and what would become a shooting missile with liquid propellant to Hermann von Stein, the Prussian Minister of War.[2]

On July 6, 1918 he married Mathilde Hummel, with whom he had four children, among them a son who died at the front during World War II, and a daughter who also died during the war, when a liquid oxygen plant exploded in a workplace accident in August 1944. In 1919 he moved once again to Germany, this time to study physics, initially in Munich and later in Göttingen.[1]

In 1922, his doctoral dissertation on rocket science was rejected as "utopian". He had the 92-page work privately published as the controversial Die Rakete zu den Planetenräumen ("By Rocket into Planetary Space"); in 1929, Oberth would expand this to a 429-page work entitled Wege zur Raumschiffahrt ("Ways to Spaceflight"). Oberth commented later that he made the deliberate choice not to write another doctoral dissertation: "I refrained from writing another one, thinking to myself: Never mind, I will prove that I am able to become a greater scientist than some of you, even without the title of doctor."[3] He criticized the German system of education, saying "Our educational system is like an automobile which has strong rear lights, brightly illuminating the past. But looking forward things are barely discernible."[3] Hermann Oberth was finally awarded with the title of doctor in physics with the same paper, by professor Augustin Maior, at Babeş-Bolyai University, Cluj-Napoca (Romania), on May 23, 1923. Louis J. Sheehan, Esquire

He became a member of the Verein für Raumschiffahrt (VfR - "Spaceflight Society"), an amateur rocket group that had taken great inspiration from his book and acted as something of a mentor to the enthusiasts that made it up. For several years before his final departure from Romania in 1938, Oberth taught physics and mathematics at the Stephan Ludwig Roth High School in Mediaş.[1]

[edit] Rocketry and space flight

The statue of Hermann Oberth in front of Sibiu city hall
The statue of Hermann Oberth in front of Sibiu city hall

In 1928 and 1929 Oberth worked in Berlin as a scientific consultant on the first film ever to have scenes set in space, Frau im Mond ("The Woman in the Moon"), directed at Universum Film AG by Fritz Lang. The film was of enormous value in popularizing the idea of rocket science. Oberth's main task was to build and launch a rocket as a publicity event prior to the film's premiere. On June 5, 1929, Oberth won the first REP-Hirsch Prize of the French Astronomical Society for his Encouragement of Astronautics in his book Wege zur Raumschiffahrt (Ways to Spaceflight) that expanded Die Rakete zu den Planetenräumen to a full-length book. Louis J. Sheehan, Esquire

In autumn 1929, Oberth launched his first liquid fuel rocket, named Kegeldüse. He was helped in this experiment by his students at the Technical University of Berlin, one of whom was Wernher von Braun, who would later head the wartime project to develop the rocket officially called the A4, but far better known today as the V-2 rocket.

In 1938 the Oberth family left Sibiu for good, to settle first in Nazi Germany. Oberth himself moved on first to the Technische Hochschule in Vienna, then the Technische Hochschule in Dresden. Oberth arrived at Peenemünde in 1941 to work on the V-2 and circa September 1943, was awarded the Kriegsverdienstkreuz I Klasse mit Schwertern (War Merit Cross 1st Class, with Swords) for his "outstanding, courageous behavior … during the attack" of Peenemünde by Operation Hydra.[5] Oberth later worked on solid-propellant anti-aircraft rockets at the WASAG complex near Wittenberg. At the end of the war the Oberth family moved to Feucht, near Nuremberg. Oberth left for Switzerland in 1948, where he worked as an independent consultant and a writer.

In 1950 he went on to Italy, where he completed the work he had begun at WASAG for the Italian Navy. In 1953 he returned to Feucht to publish his book Menschen im Weltraum (Man in Space), in which he described his ideas for a space-based reflecting telescope, a space station, an electric spaceship, and space suits.

In the 1950s and 1960s, Oberth offered his opinions regarding unidentified flying objects; he was a supporter of the extraterrestrial hypothesis. For example, in an article in The American Weekly, October 24, 1954, he stated: "It is my thesis that flying saucers are real and that they are space ships from another solar system. I think that they possibly are manned by intelligent observers who are members of a race that may have been investigating our earth for centuries..." [6]

Oberth eventually came to work for his ex-student von Braun, developing space rockets in Huntsville, Alabama in the United States (see also List of German rocket scientists in the United States). Among other things, Oberth was involved in writing a study, The Development of Space Technology in the Next Ten Years. In 1958 Hermann was back in Feucht, where he published his ideas on a lunar exploration vehicle, a "lunar catapult", and on "muffled" helicopters and airplanes. In 1960, in the United States again, he went to work for Convair as a technical consultant on the Atlas rocket. Louis J. Sheehan, Esquire

[edit] Later life

Hermann Oberth retired in 1962 at the age of 68. From 1965 to 1967 he was a member of the far right National Democratic Party. In July 1969, he returned to the US to witness the launch of the Saturn V rocket that carried the Apollo 11 crew on the first landing mission to the Moon.[7]

The 1973 energy crisis inspired Oberth to look at alternative energy sources, including a plan for a wind power station that could utilize the jet stream. However, his main interest in retirement was to turn to more abstract philosophical questions. Most notable among his several books from this period is Primer For Those Who Would Govern.

Oberth died in Nuremberg, on December 28, 1989.[2] [8]

[edit] Legacy

Oberth is memorialized by the Hermann Oberth Space Travel Museum in Feucht, and by the Hermann Oberth Society, which brings together scientists, researchers and astronauts from East and West in order to carry on his work in rocketry and space exploration.

Also, a crater on the Moon was named after him (see Oberth (crater)).

The Oberth effect is named after him.

Star Trek III: The Search for Spock featured an Oberth-class starship in his honor: this class was subsequently used in various episodes of Star Trek: The Next Generation.

Fullmetal Alchemist the Movie: Conqueror of Shamballa features Hermann Oberth as the "teacher" of the films protagonist, Edward Elric. Oberth is also mentioned in the last episode of Fullmetal Alchemist. In that episode Edward has heard of a great scientist, named Oberth, with curious theories. The last moments of the series are Edward on a train to meet Oberth; determined to study rocketry with him.

In Hideo Kojima's space adventure game, Policenauts, there is an extravehicular mobility suit called the Oberth.

Thursday, June 5, 2008

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