for cleaning upstairs outside windows for government subsidised housing. I live in california in a subsidised housing complex and they told me to clean the outside of the upstairs windows by hanging out of them, everyone i have spoken to has told me that is a health and safety code violation but i can't find it can some one help me with this.
thanks.
What is the health and safety code for cleaning upstairs outside windows for government subsidised housing?
Don't know the code, but have you tried washing them from the ground using a garden hose, or borrowing a ladder from central maintenance?
Friday, May 21, 2010
Does anyone know how physics is related to bar code scanners?
This is for a paper in my conceptual physics class. I cannot have too much information. I've already searched google, yahoo, and looked on wikipedia. I have found some basic info about bar code scanners but I am looking for the physics behind the bar code scanner more than anything.
Does anyone know how physics is related to bar code scanners?
It is a HeNe laser that reads the barcode... that's a pretty strong physics connection.
Aloha
Reply:Scanners or barcode readers used with the correct software can 'input' text, numbers near enough anything.
They do this by using Optical Character Recognition (OCR) software which allows the computer to convert the 'image of text' into the actual text.
Top of the range OCR software, used in conjunction with a quality scanner can scan a page of standard text in a matter of seconds to a very high degree of accuracy, which makes a great time saving in comparison to typing.
How OCR software works.
When the scanner scans the document, it is read as a series of black and white pixels.
The OCR software interprets the bitmap of pixels created, identifying each character's
outline.
The OCR software tries to match each character's outline in the bit map against 'character templates' stored on disc.
With unidentified characters, the OCR software uses other information such as the character's height, number of lines, curves and from this, it best-guesses the characters.
For the remaining characters which the OCR software cannot recognize, it substitutes the unknown character with a distinctive symbol such as ~ or @.
The finished information is normally able to be saved in a number of different file formats so that different applications packages can read it.
Scanners come in other forms that are used in a variety of circumstances.
For example at Supermarket's Point Of Sales (Checkouts) the data on bar codes is quickly and easily extracted using a scanner.
Each bar code is made up from a set of bars of varying thickness and separation distances. The numeric data coded in encoded in these characteristics of the bar.
The light source sends out the light and the light detector senses it 'bouncing' back, produce a corresponding set of binary pulses which give the numeric data that the bar code represents.
Bar codes are easily and quickly re-scanned should there be an error. Although error rates are very low, unwanted marks or blemishes on the bar code can cause errors.
Reply:The simple answer is that barcode scanners work by sweeping a laser across the barcode to detect the pattern based on where the light is reflected back; black bars reflect less light than the white spaces. Once the barcode is read, product information is retrieved from a computer database. The physics involved is spectrography using only black and white rather than the full spectrum of colors. This way different patterens and combinations of black and white lines can denote different product codes.
I hope that was what you were looking for.
Good luck!!
Does anyone know how physics is related to bar code scanners?
It is a HeNe laser that reads the barcode... that's a pretty strong physics connection.
Aloha
Reply:Scanners or barcode readers used with the correct software can 'input' text, numbers near enough anything.
They do this by using Optical Character Recognition (OCR) software which allows the computer to convert the 'image of text' into the actual text.
Top of the range OCR software, used in conjunction with a quality scanner can scan a page of standard text in a matter of seconds to a very high degree of accuracy, which makes a great time saving in comparison to typing.
How OCR software works.
When the scanner scans the document, it is read as a series of black and white pixels.
The OCR software interprets the bitmap of pixels created, identifying each character's
outline.
The OCR software tries to match each character's outline in the bit map against 'character templates' stored on disc.
With unidentified characters, the OCR software uses other information such as the character's height, number of lines, curves and from this, it best-guesses the characters.
For the remaining characters which the OCR software cannot recognize, it substitutes the unknown character with a distinctive symbol such as ~ or @.
The finished information is normally able to be saved in a number of different file formats so that different applications packages can read it.
Scanners come in other forms that are used in a variety of circumstances.
For example at Supermarket's Point Of Sales (Checkouts) the data on bar codes is quickly and easily extracted using a scanner.
Each bar code is made up from a set of bars of varying thickness and separation distances. The numeric data coded in encoded in these characteristics of the bar.
The light source sends out the light and the light detector senses it 'bouncing' back, produce a corresponding set of binary pulses which give the numeric data that the bar code represents.
Bar codes are easily and quickly re-scanned should there be an error. Although error rates are very low, unwanted marks or blemishes on the bar code can cause errors.
Reply:The simple answer is that barcode scanners work by sweeping a laser across the barcode to detect the pattern based on where the light is reflected back; black bars reflect less light than the white spaces. Once the barcode is read, product information is retrieved from a computer database. The physics involved is spectrography using only black and white rather than the full spectrum of colors. This way different patterens and combinations of black and white lines can denote different product codes.
I hope that was what you were looking for.
Good luck!!
What does this check engine light code mean?
I have a 2000 Mustang (V6) and the check engine light is on. I took it do Advance auto to have it checked and they told me the code is P0411 and it says Secondary Air Injection System Incorrect Flow.
I called a Ford dealer and they of course told me to bring it up there for them to charge me 200.00 just to look at the thing. They said it could be one of several different problems.
The car seems to be driving just fine but the light is bothersome. Could someone please tell me what might be wrong with the car.
Thank you!
What does this check engine light code mean?
I believe the correct code description on a Ford is "P0412 Secondary Air Injection System Switching Valve A Circuit Malfunction"
This can actually be quite serious as it may indicate a serious EVAP system problem that can cause damage over time. The diagnostic for this is expensive because in additional to the normal electronic scanners and aids a "smoke test" may have to be done on the EVAP system. Dealers will have this equipment, many independent shops can't afford it.
So, bite the bullet and take it in.
PS
No, your car does not have an air pump.
Reply:There is nothing wrong with your car.
It is only a smog issue.
When is your next smog certificate due?
You can spend thousands of dollars for the dealer to turn your check engine light off for you.
Or you can wait until you need to submit the smog test and then get it done at only a fraction of the price you would spend if you give them money every time it comes on.
Also you can get financial assistance and extensions in most states after your car fails the smog test.
A check engine light on; is an automatic fail in a smog test.
But that is all it means....... It has nothing to do with the safety or life of your car.
Some people put a slice of black tape over the light until it is time for the smog check.
Trust me on this one, it will save you thousands of dollars over the years.
P.S. never take your car to *Aamco transmissions even though they promise to check your problem for free!
*They will damage your car and charge you for the repairs.
%26lt;%26lt;%26lt;%26gt;%26gt;%26gt;
*****..EDIT..******
In answer to your Additional Details:
Your car engine does not contain an air pump.
A Secondary Air Injection System has nothing to do with your Primary Air Injection System.
If you Don't Believe Me.?.
------------------------------
Go ahead and get into dept.....$,$$$$...... Just to turn off a red light .
*****************************
Reply:take it to the dealer
Reply:tha air injection system is basicly a air pump that is ran of the engine that sends fresh air either to the front of the catalytic to help bring it to operating temp, or directly in to the catalytic to help reduce emissions. This code could mean that the pump may be defective, the hoses or pipes from the pump is defective or a sensor that makes the decision on where to send the air is defective.
I called a Ford dealer and they of course told me to bring it up there for them to charge me 200.00 just to look at the thing. They said it could be one of several different problems.
The car seems to be driving just fine but the light is bothersome. Could someone please tell me what might be wrong with the car.
Thank you!
What does this check engine light code mean?
I believe the correct code description on a Ford is "P0412 Secondary Air Injection System Switching Valve A Circuit Malfunction"
This can actually be quite serious as it may indicate a serious EVAP system problem that can cause damage over time. The diagnostic for this is expensive because in additional to the normal electronic scanners and aids a "smoke test" may have to be done on the EVAP system. Dealers will have this equipment, many independent shops can't afford it.
So, bite the bullet and take it in.
PS
No, your car does not have an air pump.
Reply:There is nothing wrong with your car.
It is only a smog issue.
When is your next smog certificate due?
You can spend thousands of dollars for the dealer to turn your check engine light off for you.
Or you can wait until you need to submit the smog test and then get it done at only a fraction of the price you would spend if you give them money every time it comes on.
Also you can get financial assistance and extensions in most states after your car fails the smog test.
A check engine light on; is an automatic fail in a smog test.
But that is all it means....... It has nothing to do with the safety or life of your car.
Some people put a slice of black tape over the light until it is time for the smog check.
Trust me on this one, it will save you thousands of dollars over the years.
P.S. never take your car to *Aamco transmissions even though they promise to check your problem for free!
*They will damage your car and charge you for the repairs.
%26lt;%26lt;%26lt;%26gt;%26gt;%26gt;
*****..EDIT..******
In answer to your Additional Details:
Your car engine does not contain an air pump.
A Secondary Air Injection System has nothing to do with your Primary Air Injection System.
If you Don't Believe Me.?.
------------------------------
Go ahead and get into dept.....$,$$$$...... Just to turn off a red light .
*****************************
Reply:take it to the dealer
Reply:tha air injection system is basicly a air pump that is ran of the engine that sends fresh air either to the front of the catalytic to help bring it to operating temp, or directly in to the catalytic to help reduce emissions. This code could mean that the pump may be defective, the hoses or pipes from the pump is defective or a sensor that makes the decision on where to send the air is defective.
How can i call america? What code do i put in front of this mobile number?
So my friend texted me from her mobile phone in america. This is the number i have on my phone +151036xxxxx
What code do i put in front of that so i can call from Australia?
How can i call america? What code do i put in front of this mobile number?
probably 00151036******
good luck
Reply:Your frend should dial 0011 15... Report It
greeting cards
What code do i put in front of that so i can call from Australia?
How can i call america? What code do i put in front of this mobile number?
probably 00151036******
good luck
Reply:Your frend should dial 0011 15... Report It
greeting cards
How to code a simple php dynamic dropdown form feild from mysql?
I been struggling with this all morning.
I am tiring to create a dynamic form field that uses data from a myself database but cannot seem to get it to work.
Anyone know how to code a simple php code for a single dropdown field form that pulls data from a table field on a mysql database.
How to code a simple php dynamic dropdown form feild from mysql?
You have a normal drop down option box, and for each line to insert the fields returned from your query.
When you say dynamic, you won't be able to do more fetches after the page has loaded. You only get one chance to do the PHP.
Reply:Here's my code:
%26lt;?php
//please replace the variable with its respective values
//$host for the mysql host name
//$username for the mysql user name
//$password for the mysql password
mysql_connect($host,$username,$passwo...
//$dbname for the database name
mysql_select_db($dbname);
?%26gt;
%26lt;form name="form1" method="post" action=""%26gt;
%26lt;?php
$query = "SELECT * FROM country";
$result=mysql_query($query);
while($row=mysql_fetch_array($result)...
echo'%26lt;select name="'.$row['name'].'"%26gt;%26lt;/select%26gt;';
}
?%26gt;
%26lt;/form%26gt;
So what Im doing in my code is first connect to the database and select which database im going to use. And then on the second part of the php im retrieving the 'name' field from 'Country' table and print it.
Reply:Contact me and I will send you some sample code
I am tiring to create a dynamic form field that uses data from a myself database but cannot seem to get it to work.
Anyone know how to code a simple php code for a single dropdown field form that pulls data from a table field on a mysql database.
How to code a simple php dynamic dropdown form feild from mysql?
You have a normal drop down option box, and for each line to insert the fields returned from your query.
When you say dynamic, you won't be able to do more fetches after the page has loaded. You only get one chance to do the PHP.
Reply:Here's my code:
%26lt;?php
//please replace the variable with its respective values
//$host for the mysql host name
//$username for the mysql user name
//$password for the mysql password
mysql_connect($host,$username,$passwo...
//$dbname for the database name
mysql_select_db($dbname);
?%26gt;
%26lt;form name="form1" method="post" action=""%26gt;
%26lt;?php
$query = "SELECT * FROM country";
$result=mysql_query($query);
while($row=mysql_fetch_array($result)...
echo'%26lt;select name="'.$row['name'].'"%26gt;%26lt;/select%26gt;';
}
?%26gt;
%26lt;/form%26gt;
So what Im doing in my code is first connect to the database and select which database im going to use. And then on the second part of the php im retrieving the 'name' field from 'Country' table and print it.
Reply:Contact me and I will send you some sample code
Is it safe and by "universal code" to have a shower stall near a circuit breaker box?
I've looked through my city's code, but nothing talks directly about this.
Is it safe and by "universal code" to have a shower stall near a circuit breaker box?
No this is not safe. The codes you are looking for are the NEC or national electric code. In that code it states that you can not have a breaker box closer than 5 ft to water (paraphrasing the nec is not a light read). Also if you have any electrical device near falling water it needs to have a water tight en closer and I'm betting that the box you are talking about is not. By the way a good rule of thumb is that water and electricity don't play well with each other.
Reply:I think I would either call an electrician or not install it by the circuit breaker. I think that would be quite dangerous.
Reply:I am assuming this stall is in a bathroom. The NEC states that a panelboard shall not be installed in bathrooms. The other electrician is right about the 5' rule. Relocate panel or stall.
Licensed electrician-22 yrs.
Reply:Think "Common Sense". Would you want to shower next to a circuit breaker box? "No" is the correct answer.
Reply:it doesnt sound safe. but as long as water dosent go near it your okay. i think
Reply:Why would you want to take the risk?
Is it safe and by "universal code" to have a shower stall near a circuit breaker box?
No this is not safe. The codes you are looking for are the NEC or national electric code. In that code it states that you can not have a breaker box closer than 5 ft to water (paraphrasing the nec is not a light read). Also if you have any electrical device near falling water it needs to have a water tight en closer and I'm betting that the box you are talking about is not. By the way a good rule of thumb is that water and electricity don't play well with each other.
Reply:I think I would either call an electrician or not install it by the circuit breaker. I think that would be quite dangerous.
Reply:I am assuming this stall is in a bathroom. The NEC states that a panelboard shall not be installed in bathrooms. The other electrician is right about the 5' rule. Relocate panel or stall.
Licensed electrician-22 yrs.
Reply:Think "Common Sense". Would you want to shower next to a circuit breaker box? "No" is the correct answer.
Reply:it doesnt sound safe. but as long as water dosent go near it your okay. i think
Reply:Why would you want to take the risk?
Do all exterior concrete block walls need to be insulated, or are there code-appropriate ways of avoiding it?
thinking my builder took too many short-cuts. am i wrong? i dont want to be called out when i go to sell because it isnt up to nc code. pls advise! thanks!
Do all exterior concrete block walls need to be insulated, or are there code-appropriate ways of avoiding it?
best check the state website on building codes or later on you could be told that your house cannot be transferred until such a time as all code violations are brought up to date.
Reply:and taking the builder to task is just to hard...take the builder to task, you spent enough money with him to get the quality that is needed and for the codes to be followed, the codes also mean that a person from county/city comes and inspects the work during its progress...as should be the case if a permit was pulled....no permit? you don't have a leg to stand on...sorry.
Reply:Not sure about NC but it used to be 4' below grade, now in most new builds it has to go to the floor with vapour barrier. There is no way of avoiding insulating exterior walls in most building codes. Call your local township or city hall. They can answer that over the phone in a few minutes.
Do all exterior concrete block walls need to be insulated, or are there code-appropriate ways of avoiding it?
best check the state website on building codes or later on you could be told that your house cannot be transferred until such a time as all code violations are brought up to date.
Reply:and taking the builder to task is just to hard...take the builder to task, you spent enough money with him to get the quality that is needed and for the codes to be followed, the codes also mean that a person from county/city comes and inspects the work during its progress...as should be the case if a permit was pulled....no permit? you don't have a leg to stand on...sorry.
Reply:Not sure about NC but it used to be 4' below grade, now in most new builds it has to go to the floor with vapour barrier. There is no way of avoiding insulating exterior walls in most building codes. Call your local township or city hall. They can answer that over the phone in a few minutes.
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