Slow motion analysis of a typical air rifle

                                   Last sunday, i had a small experiment at my home with my .22 caliber 100m range air rifle that i've bought at kolkatta last year.All i did was, i've recorded the action in a camera and analysed it frame by frame. Its very interesting to know how the air comes out of the barrel at the time of shooting.

U can hav a look for urself at:

http://www.youtube.com/watch?v=XgJrcETzLwk 

                                  Next time, i'l try to capture more interesting moments. So, dont forget to check out.

-Raghav-

About The Title "The World As I See It"

 

 "How strange is the lot of us mortals! Each of us is here for a brief sojourn; for what purpose he knows not, though he sometimes thinks he senses it. But without deeper reflection one knows from daily life that one exists for other people -- first of all for those upon whose smiles and well-being our own happiness is wholly dependent, and then for the many, unknown to us, to whose destinies we are bound by the ties of sympathy. A hundred times every day I remind myself that my inner and outer life are based on the labors of other men, living and dead, and that I must exert myself in order to give in the same measure as I have received and am still receiving...

"I have never looked upon ease and happiness as ends in themselves -- this critical basis I call the ideal of a pigsty. The ideals that have lighted my way, and time after time have given me new courage to face life cheerfully, have been Kindness, Beauty, and Truth. Without the sense of kinship with men of like mind, without the occupation with the objective world, the eternally unattainable in the field of art and scientific endeavors, life would have seemed empty to me. The trite objects of human efforts -- possessions, outward success, luxury -- have always seemed to me contemptible.

"My passionate sense of social justice and social responsibility has always contrasted oddly with my pronounced lack of need for direct contact with other human beings and human communities. I am truly a 'lone traveler' and have never belonged to my country, my home, my friends, or even my immediate family, with my whole heart; in the face of all these ties, I have never lost a sense of distance and a need for solitude..."

"My political ideal is democracy. Let every man be respected as an individual and no man idolized. It is an irony of fate that I myself have been the recipient of excessive admiration and reverence from my fellow-beings, through no fault, and no merit, of my own. The cause of this may well be the desire, unattainable for many, to understand the few ideas to which I have with my feeble powers attained through ceaseless struggle. I am quite aware that for any organization to reach its goals, one man must do the thinking and directing and generally bear the responsibility. But the led must not be coerced, they must be able to choose their leader. In my opinion, an autocratic system of coercion soon degenerates; force attracts men of low morality... The really valuable thing in the pageant of human life seems to me not the political state, but the creative, sentient individual, the personality; it alone creates the noble and the sublime, while the herd as such remains dull in thought and dull in feeling.

 "This topic brings me to that worst outcrop of herd life, the military system, which I abhor... This plague-spot of civilization ought to be abolished with all possible speed. Heroism on command, senseless violence, and all the loathsome nonsense that goes by the name of patriotism -- how passionately I hate them!

"The most beautiful experience we can have is the mysterious. It is the fundamental emotion that stands at the cradle of true art and true science. Whoever does not know it and can no longer wonder, no longer marvel, is as good as dead, and his eyes are dimmed. It was the experience of mystery -- even if mixed with fear -- that engendered religion. A knowledge of the existence of something we cannot penetrate, our perceptions of the profoundest reason and the most radiant beauty, which only in their most primitive forms are accessible to our minds: it is this knowledge and this emotion that constitute true religiosity. In this sense, and only this sense, I am a deeply religious man... I am satisfied with the mystery of life's eternity and with a knowledge, a sense, of the marvelous structure of existence -- as well as the humble attempt to understand even a tiny portion of the Reason that manifests itself in nature."



                                         The best essay ever that has influenced me to the deepest.
                                                                                                                       Raghav

Vista-User Profile Servive failed the logon.User Profile cannot be loaded.

This was the message i have encountered a few days back.
After a lot of web searchin, i've successfully recovered from it.There are many options of solvin this.I've listed out the best 3 options that'll work:
CAUSE:-
                This issue may occur if the user profile was manually deleted by using the command prompt or by using Windows Explorer. A profile that is manually deleted does not remove the security identifier (SID) from the profile list in the registry. 

If the SID is present, Windows will try to load the profile by using the ProfileImagePath that points to a nonexistent path. Therefore, the profile cannot be loaded.

1. Logon to another Administrator account.
NOTE: If you do not have another Administrator account, then proceed to step 2.

A) Go to OPTION ONE or OPTION TWO.

2. Boot into Safe Mode.
NOTE: You may not need to enable the built-in Administrator account. If this was the only normal administrator account you had, then Safe Mode should automatically boot into the built-in Administrator account.

A) If Safe Mode did not boot into the built-in Administrator account, then enable the Built-in Administrator account. If it did , then go to step 2C.

B) Logoff in Safe Mode, and then logon to the built-in Administrator account to logon with that account in Safe Mode.

C) Go to OPTION ONE or OPTION TWO.

OPTIION ONE

---

Fix the User Account Profile

1. Open the Start menu.

2. In the white line (Start Search) area, type regedit and press Enter.

3. If prompted, either click on Continue or enter the password for the Administrator account.

4. In regedit, go to: (See screenshot below step 5)

Code:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\ProfileList

5. In the left pane, look for the S-1-5..... folder (SID key) with the long number that has .bak at the end of the numbers.
(See screenshots below steps 6A and 7B)
NOTE:
A) In the right pane, look at the ProfileImagePath to verify that this is the user account profile that has the error.
B) You may have another S-1-5..... folder (SID key) above it with the exact same number without the .bak at the end of it.

6. For Two S-1-5..... folders (SID key) with the same Number -
NOTE: This is if you have two S-1-5..... folders (SID key) with the exact same numbers, but the second (below) one has the .bak at the end of the numbers.

A) In the left pane, right click on the first (top) S-1-5..... folder (SIDkey) that does not have .bak at the end of the numbers and clickRename. (See screenshot below)

B) Add .bk to the end of the numbers. (See screenshot below)

C) In the left pane, right click on the second S-1-5..... folder (SID key) with .bak at the end of the numbers and click Rename. (See screenshot above)

D) Remove only .bak from the end of the numbers and press Enter. (See screenshot below)

E) Now go back and Rename the first one with .bk to .bak now at the end of the numbers and press Enter. 

F) Go to step 8.

7. For Only One S-1-5..... Folder (SID key) with .bak -
NOTE: This is if you only have one S-1-5..... folder (SID key) for your user account with .bak at the end of the numbers.

A) In the left pane, right click on the S-1-5..... folder (SID key) with.bak at the end of the numbers and click Rename. (See screenshot below)

B) Remove only .bak at the end of the numbers and press Enter. (See screenshot below and below step 10)

8. In the right pane of the one without .bak now, right click on RefCount and click on Modify. (See screenshot below step 10)
NOTE: If you do not have RefCount, then right click on a empty space in the right pane and click New and DWORD (32 bit) Value, then type RefCount and pressEnter. This value for this entry will reset and return back to the original value after you have restarted the computer and logged on to the account.

A) Type 0 (number) and click on OK. (See screenshot below)

9. In the right pane of the one without .bak now, right click on State and click onModify. (See screenshot below step 10)
NOTE: This value for this entry will reset and return back to the original value after you have restarted the computer and logged on to the account.

A) Type 0 (number) and click on OK. (See screenshot below)

10. The registry will now look like this for the one without .bak now. (See screenshot below)

11. Close regedit.

12. Restart the computer.

13. See if you can logon now.
NOTE: If this still does not help, then try OPTION TWO below 

OPTION TWO

---

Delete the User Account Profile

   Warning

You can do this option if you do not care about losing the user account and the contents in the user folders. Your programs will still be installed, but you will need to create new shortcuts for them afterwards.

1. Delete the User account profile that this error is for.
NOTE: See: How to Delete a User Account in Vista

2. Open the Start menu.

3. In the white line (Start Search) area, type regedit and press Enter.

4. If prompted by UAC, click on Continue.

5. In regedit, go to: (See screenshot below step 7)

Code:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\ProfileList

6. In the left pane, click on one of the S-1-5..... folders (SID key) with the long number in it.
NOTE: It may have .bak at the end of it.

A) In the right pane, look at the ProfileImagePath to see if this is the same user account that you deleted in step 1 above.

B) Repeat step 6 until you find the one that you deleted in step 1 above.
NOTE: If the user account is not here, then it has already been removed when deleted in step 1. Go to step 9.

7. To Backup the Registry SID Key -
WARNING: You should backup this SID key to be safe in case you delete the wrong one in step 8 below.

A) Right click on the SID key, and click on Export.

B) Type in a name and save the REG file to a safe location.
NOTE: This is your backup. To Restore the Backup, right click on theREG backup file and click on Merge.

C) Continue on to step 8.

8. To Delete the Registry SID Key -

A) Right click on the SID key, and click on Delete. (See screenshot above)

B) Click on Yes to confirm deletion. (See screenshot below)

9. Close regedit.

10. Now, just create a new normal Administrator account.
NOTE: See: How to Create a New User Account in Vista

11. Restart the computer, and log on to your new account.
NOTE: If this still does not help, then either try OPTION ONE 

OPTION 3:-

                     1. If u hav another account , logon with it.

                     2. Download the following file from microsoft wesite:

                          http://support.microsoft.com/kb/947215

                     3. Run the file as an administrator.

                     4. Restart ur system.

P.S-This can work even in safemode for some systems.

OPTION 4:-

      Follow this only if u dont care for the affected user account.                    

1. Delete the profile by using the Computer Properties dialog box. To do this, follow these steps:
   1. Click Start, right-click Computer, and then click Properties.
   2. Click Change settings.
   3. In the System Properties dialog box, click the Advanced tab.
   4. Under User Profiles, click Settings.
   5. In the User Profiles dialog box, select the profile that you want to delete, clickDelete, and then click OK.
2. Click Start
   
   , type regedit in the Start search box, and then press ENTER.
3. Locate and then expand the following registry subkey:
   HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\ProfileList
4. Right-click the SID that you want to remove, and then click Delete.
5. Log on to the computer and create a new profile.

THAT's IT

RAGHAV

                                                  

Home made HHO gas generator

          The other day i was surfing the net about some alternate fuels. I've come across this term "HHO gas" being used extensively by many of the sites and blogs on alternete fuels. So, i've decided to try this out. Production of HHO gas begins with the age old electrolysis of water.                   

                             Electrolysis of water is the decomposition of water (H₂O) into oxygen (O₂) and hydrogen gas (H₂) due to an electric current being passed through the water.

          PRINCIPLE:

                           An electrical power source is connected to two electrodes, or two plates (typically made from some inert metal such as platinum or stainless steel) which are placed in the water. In a properly designed cell, hydrogen will appear at the cathode (the negatively charged electrode, where electrons enter the water), and oxygen will appear at the anode (the positively charged electrode). Assuming ideal faradaic efficiency, the amount of hydrogen generated is twice the number of moles of oxygen, and both are proportional to the total electrical chargeconducted by the solution. 

                     The number of hydrogen molecules produced is thus twice the number of oxygen molecules. Assuming equal temperature and pressure for both gases, the produced hydrogen gas has therefore twice the volume of the produced oxygen gas. The number of electrons pushed through the water is twice the number of generated hydrogen molecules and four times the number of generated oxygen molecules.

                          

                     Thus, this gas is commonly known as HHO gas.It took me about two days to decide the plan and setup of the experiment for hho gas and Rs.200/-. Well, u can watch for ur self about the exp below:

or                                               

http://www.youtube.com/watch?v=5SGOlukc2Pw

                       Well, as u have observed, the gas that comes out of the jar is definetly rich in HYDROGEN. This can be used as a substitute for fossil fuels.HHO also known as Oxyhydrogen is a mixture of hydrogen (H₂) and oxygen (O₂) gases, typically in a 2:1 molar ratio, the same proportion as water. This gaseous mixture is used for torches for the processing of refractory materials and was the first gaseous mixture used for welding. In practice a ratio of 4:1 or 5:1 hydrogen:oxygen is required to avoid an oxidizing flame.

                      Oxyhydrogen will combust when brought to its autoignition temperature. For a stoichiometric mixture at normal atmospheric pressure, autoignition occurs at about 570 °C (1065 °F).The minimum energy required to ignite such a mixture with a spark is about 20 microjoules. At normal temperature and pressure, oxyhydrogen can burn when it is between about 4% and 95% hydrogen by volume.

                     But,Water electrolysis does not convert 100% of the electrical energy into the chemical energy of hydrogen. The process requires more extreme potentials than what would be expected based on the cell's total reversible reduction potentials. This excess potential accounts for various forms of overpotential by which the extra energy is eventually lost as heat. For a well designed cell the largest overpotential is the reaction overpotential for the four electron oxidation of water to oxygen at the anode. An effective electrocatalyst to facilitate this reaction has not been developed. Platinum alloys are the default state of the art for this oxidation. Developing a cheap effective electrocatalyst for this reaction would be a great advance (see also). In 2008, a group led by Daniel Nocera announced a potentially more efficient catalyst for artificial photosynthesis composed of a cobalt metal, phosphate, and an electrode. Other researchers are pursuing carbon-based catalysts. The reverse reaction, the reduction of oxygen to water, is responsible for the greatest loss of efficiency in fuel cells.

                     So, lets hope for the very best. Suggestions are welcome on this post. Mail me for any more info.

Intro

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