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Wikipedia
Sun Ra (Born Herman Poole Blount; legal name Le Sony'r Ra ; born May 22, 1914 in Birmingham, Alabama, died May 30, 1993 in Birmingham, Alabama) was an innovative jazz composer, bandleader, piano and synthesizer player, who came to be known as much fo...
http://en.wikipedia.org/wiki/Sun_Ra
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Links
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Blogs
http://web.thanhnien.com.vn/Khoahoc/2008/6/5/242834.tnoTìm ra hợp chất sinh học diệt bọ đậu đen (by: unknown)
Đây là đề tài nghiên cứu được UBND tỉnh Bình Dương đặt hàng, PGS.TS Hồ Sơn Lâm (Sở Khoa học - Công nghệ Bình Dương) làm chủ nhiệm. Bọ đậu đen là loại côn trùng có cánh, xuất hiện vào mùa mưa, tỏa ra mùi hôi, cay, gây mẩn ngứa lên da ...
http://digg.com/health/Push_to_ban_food_dyes_ignites_New_risks_for_RA_sufferersPush to ban food dyes ignites! + New risks for RA sufferers! (by: unknown)
Why are artificial food dyes and a commonly prescribed rheumatoid arthritis drug in the spotlight? Learn how both can be affecting you u0026 your children.
http://www.random-abstract.com/2008/06/in-pictures-big-brother-9-one-day-to-go.htmlIn Pictures: Big Brother 9 - one day to go! Big Brother - the ... (by: ra)
In Pictures: Big Brother 9 - one day to go! Big Brother - the official Big Brother 9 UK website on channel4.com Official Big Brother 9 | Facebook 5th Bomb Wing Flunks Nuclear Inspection - Air Force Times Inspectors watched as a security ...
http://hoopshoops.blogspot.com/2008/06/heres-where-we-were-at-on-june-4-1987.htmlJune 4, 1987 (by: The Crowe's Nest)
NL East Team Name GWLT PCT GB RS RA St. Louis Cardinals 50 31 19 0 .620 - 284 233 Chicago Cubs 52 30 22 0 .577 2.0 261 221 Montreal Expos 51 28 23 0 .549 3.5 242 237 New York Mets 50 25 25 0 .500 6.0 227 233 ...
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Videos
GE_RA_Fort_Knox_superhi.mov
GE_RA_Hong_Kong_superhi.mov
[core_005]-ra-ev_panic-hifi.mov
Ra -- Broken Hearted Soul
Ra Uru Hu
Sun Ra - Space Is the Place (1974)
She-Ra opening
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Downloads
Prison break s3 e09 didou rar
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Definition
3 definitions found for rs:From Virtual Entity of Relevant Acronyms (Version 1.9, June 2002): RS
Recommended Standard
From Virtual Entity of Relevant Acronyms (Version 1.9, June 2002): RS
Registry Service (DCE, ebXML, ...)
From The Free On-line Dictionary of Computing (27 SEP 03): RS
1. <character> Record Separator
2. <standard> Recommended Standard, a series of EIA
standards including EIA-232.
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Questions & Answers
How do you calculate the DEC and RA of the sun?
I am working on some robotic art and would like to catch the reflection of the Sun in a mirror and reflect it on a stationary plant.
Given the latitude and longitude how might I calculate the DEC and RA of the sun (to aim the mirror) at every point in the day?
Do you think this can be done/ built into a clockworks mechanism? Or would servo/ electric control be needed?
Corn...
That sounds like exactly what I want! Thank you so much.
But do you think it can be built into a clockworks (gears, pulleys and cams) device?
I think what you’re wanting is a way to calculate the Sun’s altitude and azimuth for a given time and location. The calculations are bit involved—you’d need to determine the Julian (Ephemeris) Date, solve Kepler’s equation to determine eccentric anomaly, then true anomaly, the Sun’s radius vector to obtain the Sun’s longitude, the obliquity of the ecliptic to determine latitude, then transform the RA and dec coordinates to altitude and azimuth. I’m probably leaving something out. Anyway, I do have the formulae, but thought I’d see if that’s what you’re really wanting before I do a lot of typing.
Perhaps a more sane approach would be to modify a telescope (a Meade or other) and let its mounting do the tracking for you? Just an idea.
[edit]
My apologies for the delay in updating my answer. Here’s how to calculate the Sun’s RA and dec:
First, calculate the Julian Day (JD). (note: Julian Day begins at Greenwich mean noon, or 12h Universal Time).
Let
YYYY = year
MM = month
DD.dd = day (fraction of day derived from hours, minutes, seconds past 00:00:00 UT; convert local time to Universal Time before doing this)
If MM > 2, then
y = YYYY
m = MM
If MM = 2 or 1, then
y = YYYY – 1
m = MM + 12
If date >= October 15, 1582 (in your case it will be), calculate
A = INT(y / 100)
B = 2 – A + INT(A / 4)
else (not in your case)
B = 0
Julian Day is then:
JD = INT(365.25 * y) + INT(30.6001 * (m + 1)) + DD.dd + 1720994.5 + B
Next, calculate the time T (measured in Julian centuries of 36525 ephemeris days from the epoch 1900 January 0.5 ET):
T = (JD – 2415020.0) / 36525
Note: since T is expressed in centuries, it should be calculated with a sufficient number of decimals; an error of 0.0001 in T corresponds to an error of 0.37 day in the time.
Then, geometric mean longitude of the Sun (in degrees):
L = 279.69668 + 36000.76892 * T + 0.0003025 * T^2
Sun’s mean anomaly (in degrees):
M = 358.47583 + 35999.04975 * T – 0.000150 * T^2 – 0.0000033 * T^3
Eccentricity of the Earth’s orbit:
e = 0.01675104 – 0.0000418 * T – 0.000000126 * T^2
Here, I opted for an easier method that doesn’t require the solution of Kepler’s equation; the Sun’s radius vector isn’t needed:
Sun’s equation of center C (in degrees):
C = + (1.919460 – 0.004789 * T – 0.000014 * T^2) * sin(M) + (0.020094 – 0.000100 * T) * sin(2 * M) + 0.000293 * sin(3 * M)
Sun’s true longitude (stl) is:
stl = L + C
(The true anomaly (M + C) is not needed.)
Sun’s apparent longitude (sal) is then:
sal = stl - 0.00569 – 0.00479 * sin(259.18 – 1934.142 * T)
Then calculate the obliquity of the ecliptic (oe):
oe = 23.452294 – 0.0130125 * T – 0.00000164 * T^2 + 0.000000503 * T^3
To correct for apparent position:
oe = oe + 0.00256 * cos(259.18 – 1934.142 * T)
Then, for RA and dec:
tan(RA) = cos(oe) * sin(sal) / cos(sal)
sin(dec) = sin(oe) * sin(sal)
or
RA = arctan(cos(oe) * sin(sal) / cos(sal))
dec = arcsin(sin(oe) * sin(sal))
You can convert RA from degrees to hours by dividing by 15.
Assuming I didn’t overlook something or typo, this should get you the Sun’s RA and dec for a given time. Do you also need a method to transform RA and dec to altitude and azimuth for a given time and location? (I’m thinking yes)
What is the significance of the eye of Horus and/or Ra appearing in a dream?
I had a very real dream about a mystery sojourn for which I sought help. There was a woman in the desert dressed like a gypsy wearing a veil. She beckoned my hand and out came hundreds of egyptian symbols as she talked to me. Also, a map of the world appeared. The only symbol I remember specifically is the eye of Horus and possibly the eye of Ra too, which all the other symbols are hazy. Oddly, she felt like a guardian or something.
Interesting analysis, though when I had the dream there was no woman in my life. Two years after the dream I dated a woman, who come to find out, seemed to get around. I ended up breaking up with her before getting too deep because our views on the relationship were totally different each other.
This is the first realistic feeling dream I've ever had, which was six years ago. The other realistic dreams that followed later on are predictions. Perhaps this is the start for when my dreams turn into predictions, that is if this actually is what the dream was really about.
Hi Scott,
Let's see what you've got there........
about a mystery sojourn for which I sought help.
((Dream opens by commenting on something you are doing with your life.... .something you are going towards.... Moving forward with......))
There was a woman in the desert dressed like a gypsy
((the desert is a point of view of one's life.... It is how you see your life.... there is a woman in your life.... and she gets around, it seems...... As the symbolic "gypsy" is one who is never in one place... this is how you see her......))
wearing a veil.
((she hides something about herself from you.... You view her as exotic.....))
She beckoned my hand
((You feel as if you belong to her.... One's hand is often given in marriage...... Something you say she "beckoned" or called.....))
and out came hundreds of egyptian symbols as she talked to me.
((There is communication here between you two..... symbols are the messages of communication... it is writing... again, communication.....))
Also, a map of the world appeared.
((dream says that you think she knows you.... a map is a diagram of the big picture........))
The only symbol I remember specifically is the eye of Horus
((I admit, I do not know much about Horus, with the exception that it was worshipped as a god..... False..However, it is not about Horus as a god, but as the "eye"......... and the eye is the means by which we gather understanding.......))
and possibly the eye of Ra too,
***Ra is the same......
which all the other symbols are hazy. Oddly, she felt like a guardian or something.
Your sister,
Ginger
How do I determine the number of electrons transferred per mole of a OA or RA?
So here is the equation that I am trying to figure out, it is the example from my textbook.
KMnO4 + H2C2O4 + H2SO4 =CO2 + K2SO4 + MnSO4 + H20
The number of electrons transferred are 5e-/Mn and 1e-/C (the OA and RA).
So how do I determine the number of electrons transferred per mole for KMnO4 and H2C2O4??? Please Help!
Write the 1/2 reactions!
MnO4-(aq) + 8H+(aq) + 5e- --> Mn+2 + 4H2O ==> 5 electrons accepted/mole
C2O4-2 --> 2CO2 + 2e- ==> 2 electrons lost/mole
remember OILRIG
oxidation is loss
reduction is gain
so MnO4- is reduced
and C2O4-2 is oxidized
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