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XuLaQueNguoi
post Feb 14 2010, 01:38 PM
Post #157


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Sis Nora ơi, đầu năm mà đã gặp chuyện buồn rồi sao. Mụi thấy sis chuẩn bị đón Xuân thật thịnh xoạn làm mụi ngưỡng mộ quá chừng. Mụi đang ngồi chờ mấy cái bánh sis cúng xong lấy đãi mụi mà ;). Thôi mụi hổng dám làm phiền sis đâu cho sis mượn khăn tay hỉ mũi rồi mụi chúc sis nỗi đau sẽ qua niềm vui trở lại.
love1.gif love1.gif love1.gif
Sis biết khi gặp chuyện buồn mụi nghĩ sao không?
It is just a hair
Let it goes
Another will grow
Life is suffering when we lost hope.. or get hurt, but be happy for it is not the worse.. I know you are a strong person, so be strong so tommorrow your day will be brighter. Takecare sis honlandau.gif
love1.gif love1.gif love1.gif


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Đa Tình
post Feb 15 2010, 02:23 AM
Post #158


Trái Tim Đa Tình
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Nora dear...anh mới converted vài viết từ PDF file mà bửa trước anh nói đã tìm được...không biết có phải là bài viết mà Nora nói tới không...nhưng đọc cũng quite interesting...here it is Nora...

~~~~~~~~~~~~~~~~~~~~~~~~~~~



FROM MERCURY TO APOLLO



BY ASTRONAUT M. SCOTT CARPENTER AND DR R. B. VOAS

THERE are no unmanned space systems. There are some systems that man operates from the ground, and there are others that he travels with into space and operates from the space environment himself. The question is not, will there be machines or will there be men, but rather, where is the most effective place for the men to operate?

The man in the spacecraft can function in three major ways to collect scientific data. First, he can function as a "sensor." More important, he can act as a "filter" both before sensing (by choosing the star or object to be sensed) and after the sensing, by sorting the data and transmitting only the significant parts. A third role for the man is to ensure that the scientific sensing equipment goes into space and returns intact. The man can be a pilot, a maintenance worker and a scientist all in one.

Future space missions, particularly Apollo—the project to land men on the Moon—will require rendezvous techniques.

Normally, the pilot will be given radar information as a reference for controlling his craft. However, the piloting during the final stages of the rendezvous manoeuvre will be done by external visual reference.

One opportunity to view other objects in space during Mercury orbital nights is provided immediately after the craft separates from its sustainer rocket stage. The pilot can continue to watch the stage pass below him by pitching his spacecraft down. This is not usually done because it is necessary for the spacecraft to return to its "normal" attitude over the Canary Island tracking station to ensure adequate radar contact.

Rendezvous can be accomplished by using a technique employing a flashing light on the target vehicle, beginning at a distance of at least 20 miles. During the rendezvous with a target vehicle, the pilot holds its flashing light stationary against the background field of stars. When the pilot has manoeuvred his spacecraft so that the
light is "stationary," then the two vehicles are on a collision course.

The only information the pilot then needs is the closing rate. This can be determined by a relatively simple radar system. It can also be computed by the pilot from a knowledge of the manoeuvres required to bring the spacecraft into the position where the flashing light appears to stand still.

The Mercury astronaut was given three rough means of determining his position:—

Using his clock, which was periodically checked against ground time, he could determine his position from a map on which his orbital paths and predicted times were marked.

Another method of navigation was provided by star charts. By recognizing a star and using his star-navigation device, the astronaut could work backwards and determine the time from the star position, then refer to his orbital map.

A third method would be for the astronaut to recognize a ground terrain landmark such as a coastline, and from his map determine the time he should cross the landmark in relationship to the actual time.

Much more precise methods of navigation will be required for manoeuvring spacecraft and for deep-space flights. The general requirement will be for him to measure the angle between a star and some nearby reference point. Two reference sources are available—either landmarks or the horizon of the Earth and Moon.

An area of study for navigational reference has been the use of "checkpoints" on Earth. Two possibilities exist—using natural terrain features, and special artificial checkpoints (particularly lights).

A difficult problem is presented by cloud coverage. An area over the West African desert is the only area which has been consistently clear on all US orbital flights. Astronaut John Glenn took pictures of it.

The use of lights on the ground for navigational reference has been studied on all American orbital flights to date. With appropriate weather, lights from the ground can be seen readily, as is indicated by Col Glenn's observations of the lights of the city of Perth, Australia, on his flight.

Lights were illuminated near Woomera, Australia, and on the Indian Ocean tracking ship halfway between Africa and Australia, during Astronaut Glenn's mission. On Commander Carpenter's flight, ground flares were again lit near Woomera. On Astronaut Walter Schirra's flight, an attempt was made to use an arc light from Durban, South Africa, and the flares were used again near Woomera.

All of these attempts have failed, apparently due to weather conditions. There has been no verified sighting by the astronauts of any signal lights.

Another use of the view available to the astronaut is to inspect the external surface of his spacecraft, to assist in monitoring and checking his vehicle's systems. In the Mercury spacecraft, the proper jettisoning of the escape tower can be monitored through the centreline window. The deployment of the parachute can also be monitored.

The external view through the window also allows for inspection of the external surface to ensure that it is intact, and would permit observation of any evidence of leaks of fluid or gases from the spacecraft. On re-entry into the atmosphere, the pilot has a view of the flow pattern of the hot gases around the spacecraft. John Glenn reported seeing large chunks of flaming metal "flowing" around his spacecraft.

US Weather Bureau scientists were particularly interested in receiving Col Glenn's reports on the visibility of clouds on the night side of the Earth. The Tiros weather satellites then in orbit could not view cloud patterns on the dark side.

Astronaut Glenn reported seeing lightning from two storms over the Indian Ocean. He was able to report that, with a quarter-moon, he could see clouds below him illuminated by moonlight.

Photographs taken by the astronauts indicate that a yellow or red filter is required on the cameras of the forthcoming Nimbus weather satellite, to provide photographic contrast. Thus an immediate practical result for the Nimbus programme was achieved.

An incidental benefit from the Mercury flights has been the building of a small catalogue of photographs of the Earth's surface, taken from space. The National Aeronautics and Space Administration established the catalogue for geophysical studies. They are particularly valuable for Africa, where there has been relatively little geological exploration.

Such photographs may help develop techniques for interpreting photographs taken in close fly-bys of the planets.



***

FLIGHT International, 23 May 1963

Trích từ website "http://www.flightglobal.com"


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Đa tình tự tử trên cây mận,
ai ngờ mận gãy giờ tưng tưng. (do NNT tặng...)
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Đa Tình
post Feb 15 2010, 02:48 AM
Post #159


Trái Tim Đa Tình
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QUOTE(Hoa_Trang_Trang @ Feb 15 2010, 07:42 AM) *
Chào anh Đa năm mới anh khỏe không ..??năm mới em chúc anh thật vui vẻ... nature-smiley-009.gif

Cám ơn Trang...anh khỏe...năm mới anh chúc Trang dui dẻ và muốn gì được nấy nha... love1.gif


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Đa tình tự tử trên cây mận,
ai ngờ mận gãy giờ tưng tưng. (do NNT tặng...)
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vbx
post Feb 23 2010, 07:52 AM
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vbx
post Feb 23 2010, 09:12 AM
Post #161


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XuLaQueNguoi
post Feb 23 2010, 09:38 PM
Post #162


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Sis Nora ui, hi`nh cây xương rồng giống cây xương rồng mụi thấy ở Arizona gần nhà bạn của mụi. Còn mấy chiếc xe đó giống xe mấy người meter security lái đi lòng vòng phạt xe nào đậu quá giờ. Có lần gia đình mụi lái xe qua Canada chơi vừa đậu vào parking lot để vào giftshop mua quà thì có hai tên tới xe (có mommy trong xe) tính cho ticket. May là Xứ vừa ra khỏi shop thấy chạy tới giải thích cần đi đổi tiền để bỏ vào máy. Mấy ông đó nhân đạo không có cho ticket. Nhìn hình mấy nhân vật cao cấp ngầu quá.. không biết khi nào Xứ trèo lên cây 100K. Chú gấu thật tội. Mùa đông mà không vào hang hibernating lại chạy ra ngoài tìm đồ ăn chi cho bị bắt. Thankyou for sharing sis.


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vbx
post Feb 24 2010, 06:31 AM
Post #163


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vbx
post Feb 24 2010, 07:40 AM
Post #164


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XuLaQueNguoi
post Feb 24 2010, 04:30 PM
Post #165


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Thường vào đêm trăng tròn sinh vật thường phát triển nẩy nở như lông tóc và ngay cả muốn sổ lãi sán ông bà cũng khuyên nên chờ ngày trăng tròn để cho bọn chúng tẩy ra một loạt.

Cá cũng thường lên bờ đẻ trứng vào những đêm trăng tròn. Con người chắc cũng không thoát ra khỏi dục vọng đó.

Thi nhân cũng có nhiều cảm xúc hơn vào những đêm trăng tròn.

Không hiểu mặt trăng có nhu tình ẩn ý gì mà gây ảnh hưởng rất lớn đến nhân sinh nhỉ?

Thanks for the tips sis! Chỉ có nước học cao hơn để lấy bằng bác sĩ mặc may còn với tới chứ ngôi nhà trắng còn xa vời vợi hơn. ;)


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vbx
post Feb 25 2010, 03:47 AM
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vbx
post Feb 25 2010, 04:52 AM
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XuLaQueNguoi
post Feb 25 2010, 08:46 PM
Post #168


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Sis Nora mến,

Ở Cali nổi tiếng về vụ nữa khuya đi dọc theo bờ biển bắt cá bằng tay không... vui lắm... sis đọc thêm sis sẽ rỏ:

Here's why: Grunion inhabit the nearshore waters from the surf to a depth of 60 feet. They most likely do not migrate according to tagging studies. Each spring and summer from March through August grunion leave the water at night to spawn on the beach for four consecutive nights starting the nights of the full and new moons. Spawning begins after high tide and continues for several hours. Peak spawning is late March to early June. As a wave breaks on the beach, grunion swim as far up the slope as possible. The female arches her body and excavates the semifluid sand with her tail to create a nest. She twists her body and digs until she is half buried in the sand with her head sticking up. She then deposits her eggs in the nest. Males curve around the female and release milt. The milt flows down the female’s body until it reaches and fertilizes the eggs. As many as eight males may fertilize the eggs in a nest. After spawning, the males immediately retreat toward the water while the female twists free and returns with the next wave. While spawning may take only 30 seconds, some fish remain stranded on the beach for several minutes.

The DFG provides a chart listing the months you are allowed to catch them during spawning season. Called Leuresthes tenuis, these members of the silversides family can only be caught with your bare hands. On a grunion run, "anglers" put their catch in a bucket with a bit of ocean water till the take the fish home to clean and prepare them for cooking. Regulations for hunting for grunion can be confusing. State and local beaches that impose curfews during the hours grunion spawn can be usurped by laws for fishing that allow fishermen with valid licenses to stand on the shoreline and fish most any time. The best practice is to call your local beach entity and get the scoop. Call (310) 548-7562 for details. http://www.beachcalifornia.com/grunion-run.html



Việc học của Xứ còn lâu lắm, mới đến điểm B thôi, chưa đến Midterm thì làm gì tới last term sớm vậy sis. Xứ mới có rồ ga bắt đầu lái lên dốc thôi .. còn lâu mới tới đích mà còn nhiều chướng ngại vật chưa thể dứt khoát cũng như thủ tục đầu tiên và nhiều nghị lực để tiến tới nữa sis.

Mụi cũng khóc rất nhiều nên mắt yếu và viêm đỏ nhưng sau khi mụi đắp lá dấp cá đã nghiền nát mắt mụi trong trắng trở lại thật đó. Mắt cần rất nhiều nước nên nếu khóc bao nhiêu lít nước thì ráng uống vào để giúp nó làm việc được tốt hơn. Chúc sis mãi vui nhé ;)


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