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Showing posts with label Structured settlement. Show all posts
Showing posts with label Structured settlement. Show all posts
Sunday, November 9, 2008
Sunday, August 31, 2008
Top 10 Matlab Commands for Linear Algebra Students
1. basic input: "A = [ 1 2 3; -1 2 3; 2 4 5 ]" inputs a 3x3 matrix by rows; variants
"b = [ -1 2 1]' " or "b = [ -1; 2; 1]" to input a column vector b, and
"C = [ A b ]" to produce a matrix C containing A augmented with b.
Note: "format compact" reduces output spaces; also try "format long", "format rat", "help format".
2. rref: "rref(A)" reduces A to reduced echelon form; see also "rrefmovie(A)".
3. basic arithmetic: "A*B", "A+B", "A\b" to multiply and add matrices, solve Ax = b.
4. help: "help command" gives information about "command", e.g. "help rref".
Note: "more on" gives output (e.g. from help) one screen at a time.
5. lookfor: "lookfor keyword" tries to find commands relevant to "keyword"; e.g. "lookfor null".
6. diary: "diary myfile" records subsequent output in the file "myfile" for printing later;
"diary off" stops the recording; "!mail name@email.address < myfile" emails "myfile" to "name@email.address" from a computer with a Unix OS.
7. rand: "rand(6,4)" produces a random 6x4 matrix.
8. det: "det(A)" computes the determinant of a square matrix A.
9. inv: "inv(A)" tries to compute the inverse of a square matrix A.
10. eig: "eig(A)" computes eigenvalues(vectors) for square A; try "help eig" for more info.
Note: the uparrow key gives previous commands that may be edited to save typing; this only works if your keyboard characterstics are properly recognized.
"b = [ -1 2 1]' " or "b = [ -1; 2; 1]" to input a column vector b, and
"C = [ A b ]" to produce a matrix C containing A augmented with b.
Note: "format compact" reduces output spaces; also try "format long", "format rat", "help format".
2. rref: "rref(A)" reduces A to reduced echelon form; see also "rrefmovie(A)".
3. basic arithmetic: "A*B", "A+B", "A\b" to multiply and add matrices, solve Ax = b.
4. help: "help command" gives information about "command", e.g. "help rref".
Note: "more on" gives output (e.g. from help) one screen at a time.
5. lookfor: "lookfor keyword" tries to find commands relevant to "keyword"; e.g. "lookfor null".
6. diary: "diary myfile" records subsequent output in the file "myfile" for printing later;
"diary off" stops the recording; "!mail name@email.address < myfile" emails "myfile" to "name@email.address" from a computer with a Unix OS.
7. rand: "rand(6,4)" produces a random 6x4 matrix.
8. det: "det(A)" computes the determinant of a square matrix A.
9. inv: "inv(A)" tries to compute the inverse of a square matrix A.
10. eig: "eig(A)" computes eigenvalues(vectors) for square A; try "help eig" for more info.
Note: the uparrow key gives previous commands that may be edited to save typing; this only works if your keyboard characterstics are properly recognized.
MATLAB
What is Matlab?
Matlab (short for MATrix LABoratory) is a language for technical computing, developed by the The Mathworks, Inc. It provides a single platform for computation, visualization, programming and software development. All problems and solutions in Matlab are expressed in notation used in linear algebra and essentially involve operations using matrices and vectors.
As part of the undergraduate Electrical Engineering program, you will be using Matlab to solve problems in
* Circuits
* Communication systems
* Digital signal processing
* Control systems
* Probability and statistics
In addition, you can use Matlab to build Graphical User Interfaces (GUIs) so that you can develop user-friendly custom software.
The Matlab software environment has a core module (called Matlab) and associated with that are a set of "Toolboxes" that perform specialized computations.
Matlab Tutorial
The tutorial is organized into the following sections; just follow the links. The best way to learn Matlab is by actually doing the examples indicated.
* Getting Started
* Vectors and Matrices
* Vector and Matrix Operations
* Loops
* Plotting
* Printing
* File Input/Output
* Executable files (m-files) in Matlab
Getting Started
Note: In all of the discussion in the following sections, stuff that you type in will be written in boldface. All Matlab output will be normal font.
Double click on the Matlab icon to start the program (duh....). A MATLAB Command Window should pop-up with the following text:
To get started, type one of these commands: helpwin, helpdesk, or demo.
>>
The ">>" is a prompt, requiring you to type in commands. One of the first commands you should type in is to find out what your working directory is. The working directory is where you will save the results of your calculations. So, type in
>> pwd
pwd stands for "print working directory". You probably would get an output like:
ans =
\\ENGNET\MATLAB\bin
Matlab always stores the result of its last calculation in a variable called ans (short for answer). Now this indicates the working directory. You can change the working directory using the cd (short for change directory) command. Do
>> cd C:\temp
>> pwd
ans =
C:\temp
Now, the results of your computations will be saved in the C:\temp directory, when you issue the correct commands (more about that later).
Online help can be accessed for all Matlab commands by issuing the help command.
>> help
To get started, you can simply type
>> help
Vectors and Matrices
Variables in Matlab are just like variables in any other programming language (C, C++ etc.); only difference is that you do not have to define them by indicating the type etc. Also, variable names (case sensitive) can be used to refer to a single number (a scalar), a set of numbers (a vector) or an array of numbers (a matrix).
Vectors are nothing but matrices having a single row (a row vector), or a single column (a column vector).
To create a row vector in Matlab, do:
>> r = [1 2 3 4]
r =
1 2 3 4
A column vector can be created by
>> c = [1; 2; 3; 4]
c =
1
2
3
4
On the other hand, you can use the ' operator (transpose)
>> c = r'
c =
1
2
3
4
Vectors can also be created by incrementing a starting value with a constant quantity. For example,
>> r = [0:2:10]
r =
0 2 4 6 8 10
creates a row vector, with the first element = 0; each element inceremented by 2; until the final value of 10.
You can index specific parts of a vector. For example, to get the third element in the vector r, you can do
>> r(3)
ans =
4
Matrices are 2 dimensional quantities and are created similar to vectors. We can do
>> a = [1 2 3; 4 5 6; 7 8 9; 10 11 12]
a =
1 2 3
4 5 6
7 8 9
10 11 12
which is a 4x3 matrix (4 rows and 3 columns). We can also use the incremenation principle to do
>> b = [0:2:10; 1:2:11]
b =
0 2 4 6 8 10
1 3 5 7 9 11
which is a 2x6 matrix. Again, individual elements of the matrix, for instance the element in the 2nd row, 5th column can be accessed using the notation:
>> b(2, 5)
ans =
9
Vector and Matrix Operations
The basic arithmetic operations +, -, *, / can be used for vectors and matrices. These would generate corresponding output vectors or matrices. For example, to add two vectors:
>> a = [1 2 3 4];
>> b = [5 6 7 8];
>> c = a+b
c =
6 8 19 12
The semicolons (;) in the first two commands direct Matlab not to echo the values of the variables a and b on to the screen immediately after you type them. Obviously, only vectors that have the same number of elements can be added or subtracted. Similarly, two matrices with identical number of rows and columns can be subtracted as follows:
>> a = [1:3:20; 21:3:40];
>> b = [2:3:20; 22:3:40];
>> c = a-b
c =
-1 -1 -1 -1 -1 -1 -1
-1 -1 -1 -1 -1 -1 -1
Matrix multiplication using the * symbol is possible only if the number of columns in the first matrix equals the number of rows in the second:
>> a=[1 2 3; 4 5 6]
a =
1 2 3
4 5 6
>> b = a'
b =
1 4
2 5
3 6
>> c=a*b
c =
14 32
32 77
However, if you want to multiply corresponding elements of two matrices, then you do an array multiply using the .* symbol.
>> a = [1 2 3 4; 5 6 7 8]; b=[2 2 2 2; 3 3 3 3];
>> c=a .* b
c =
2 4 6 8
15 18 21 24
Discussion on matrix "division" using the / symbol for matrices is postponed till later.
Solving systems of linear equations in Matlab
To solve the set of equations
a1 x + b1 y + c1 z = d1
a2 x + b2 y + c2 z = d2
a3 x + b3 y + c3 z = d3
we set this up as a matrix equation of the form
P U = Q
where
P = [a1 b1 c1; a2 b2 c2; a3 b3 c3]
U = [x; y; z]
Q = [d1; d2; d3]
The solution of this system of equations is U = P-1 Q; this is accomplished in Matlab using
>> U = inv(P)*Q
or by using the backslash \ operator
>> U = P\Q
Exercise:
1. Set up Mesh Current Equations in the form R I = V and solve for the mesh currents, I.
2. Set up Node Voltage Equations in the form G V = I and solve for node voltages, V.
Loops
The for loop (very similar to C expression) is a simple command for setting up a loop. Example:
>> for i = 1:10;
>> a(i) = i*i;
>> end
>> a
a =
1 4 9 16 25 36 49 64 81 100
All statements between the for and the end statements will be executed as per the command specifications. Example of a for loop where the increment is not 1 would be >> for i = 1:3:20; ..... etc.
Type in
>> help for
for more details.
Plotting
The plot command is used for generating 1-D (functions of one variable) plots. Do >> help plot for complete details. Let's make a graph of y = sin(x), for x on the interval x=0, to x = 10.
>> x = [0:0.1:10]; (here .1 is the increment)
>> y = sin(x); (notice how the sin function operates on each element of the entire row vector x, to generate a nother row vector y)
>> plot (x, y)
Surface or 2-D (functions of two variables) plots are generated using the surf command. More on that later.
To clear a plot, type in >> clg (clear graph)
To generate another plot window, do >> figure
Printing
You can print a plot using the Print Option under the File Menu in the Figure Window. The text in the Command Window is printed similarly.
File Input/Output
The save and load commands are used for saving data to disk or loading data from disk, respectively.
To save values in a matrix or vector, called, for instance, y, do:
>> y = [1 2 3 4; 5 6 7 8];
>> save y.txt y -ascii
The -ascii option ensures that the data is saved in ASCII form, so that it can be read by other programs - Word, Excel Notepad, Wordpad, etc. Examine the file y.txt using one of these programs. The file is generated in the working directory (remember this? If not click here).
An ASCII data file dat.txt can be loaded using
>> load dat.txt
This provides a variable called dat in the Matlab workspace. All manner of vector/matrix operations can be performed on dat, just like any other variable.
Do >> help save and >>help load for learning all the load/save options.
After you read the next section, click here for a fun Matlab project - generating music with Matlab!
Executable files (m-files in Matlab)
Executable files in Matlab are generated by storing a list of Matlab commands in a file given the extension .m
These files are called M-files. To create an M-file, use the New...M-file Option under the File Menu in the Command Window. Type in the following commands in the M-File Editor Window:
x = [0:0.1:10];
y = cos(x);
plot(x,y)
xlabel('x')
ylabel('y')
title('A plot of Cosine(x)')
Save the file using the Save Option under the File Menu in the M-File Editor Window. Call it, say, cosineplot.m. Now, to run this program in Matlab, move over to the Matlab Command Window and just type in >> cosineplot
Matlab (short for MATrix LABoratory) is a language for technical computing, developed by the The Mathworks, Inc. It provides a single platform for computation, visualization, programming and software development. All problems and solutions in Matlab are expressed in notation used in linear algebra and essentially involve operations using matrices and vectors.
As part of the undergraduate Electrical Engineering program, you will be using Matlab to solve problems in
* Circuits
* Communication systems
* Digital signal processing
* Control systems
* Probability and statistics
In addition, you can use Matlab to build Graphical User Interfaces (GUIs) so that you can develop user-friendly custom software.
The Matlab software environment has a core module (called Matlab) and associated with that are a set of "Toolboxes" that perform specialized computations.
Matlab Tutorial
The tutorial is organized into the following sections; just follow the links. The best way to learn Matlab is by actually doing the examples indicated.
* Getting Started
* Vectors and Matrices
* Vector and Matrix Operations
* Loops
* Plotting
* Printing
* File Input/Output
* Executable files (m-files) in Matlab
Getting Started
Note: In all of the discussion in the following sections, stuff that you type in will be written in boldface. All Matlab output will be normal font.
Double click on the Matlab icon to start the program (duh....). A MATLAB Command Window should pop-up with the following text:
To get started, type one of these commands: helpwin, helpdesk, or demo.
>>
The ">>" is a prompt, requiring you to type in commands. One of the first commands you should type in is to find out what your working directory is. The working directory is where you will save the results of your calculations. So, type in
>> pwd
pwd stands for "print working directory". You probably would get an output like:
ans =
\\ENGNET\MATLAB\bin
Matlab always stores the result of its last calculation in a variable called ans (short for answer). Now this indicates the working directory. You can change the working directory using the cd (short for change directory) command. Do
>> cd C:\temp
>> pwd
ans =
C:\temp
Now, the results of your computations will be saved in the C:\temp directory, when you issue the correct commands (more about that later).
Online help can be accessed for all Matlab commands by issuing the help command.
>> help
To get started, you can simply type
>> help
Vectors and Matrices
Variables in Matlab are just like variables in any other programming language (C, C++ etc.); only difference is that you do not have to define them by indicating the type etc. Also, variable names (case sensitive) can be used to refer to a single number (a scalar), a set of numbers (a vector) or an array of numbers (a matrix).
Vectors are nothing but matrices having a single row (a row vector), or a single column (a column vector).
To create a row vector in Matlab, do:
>> r = [1 2 3 4]
r =
1 2 3 4
A column vector can be created by
>> c = [1; 2; 3; 4]
c =
1
2
3
4
On the other hand, you can use the ' operator (transpose)
>> c = r'
c =
1
2
3
4
Vectors can also be created by incrementing a starting value with a constant quantity. For example,
>> r = [0:2:10]
r =
0 2 4 6 8 10
creates a row vector, with the first element = 0; each element inceremented by 2; until the final value of 10.
You can index specific parts of a vector. For example, to get the third element in the vector r, you can do
>> r(3)
ans =
4
Matrices are 2 dimensional quantities and are created similar to vectors. We can do
>> a = [1 2 3; 4 5 6; 7 8 9; 10 11 12]
a =
1 2 3
4 5 6
7 8 9
10 11 12
which is a 4x3 matrix (4 rows and 3 columns). We can also use the incremenation principle to do
>> b = [0:2:10; 1:2:11]
b =
0 2 4 6 8 10
1 3 5 7 9 11
which is a 2x6 matrix. Again, individual elements of the matrix, for instance the element in the 2nd row, 5th column can be accessed using the notation:
>> b(2, 5)
ans =
9
Vector and Matrix Operations
The basic arithmetic operations +, -, *, / can be used for vectors and matrices. These would generate corresponding output vectors or matrices. For example, to add two vectors:
>> a = [1 2 3 4];
>> b = [5 6 7 8];
>> c = a+b
c =
6 8 19 12
The semicolons (;) in the first two commands direct Matlab not to echo the values of the variables a and b on to the screen immediately after you type them. Obviously, only vectors that have the same number of elements can be added or subtracted. Similarly, two matrices with identical number of rows and columns can be subtracted as follows:
>> a = [1:3:20; 21:3:40];
>> b = [2:3:20; 22:3:40];
>> c = a-b
c =
-1 -1 -1 -1 -1 -1 -1
-1 -1 -1 -1 -1 -1 -1
Matrix multiplication using the * symbol is possible only if the number of columns in the first matrix equals the number of rows in the second:
>> a=[1 2 3; 4 5 6]
a =
1 2 3
4 5 6
>> b = a'
b =
1 4
2 5
3 6
>> c=a*b
c =
14 32
32 77
However, if you want to multiply corresponding elements of two matrices, then you do an array multiply using the .* symbol.
>> a = [1 2 3 4; 5 6 7 8]; b=[2 2 2 2; 3 3 3 3];
>> c=a .* b
c =
2 4 6 8
15 18 21 24
Discussion on matrix "division" using the / symbol for matrices is postponed till later.
Solving systems of linear equations in Matlab
To solve the set of equations
a1 x + b1 y + c1 z = d1
a2 x + b2 y + c2 z = d2
a3 x + b3 y + c3 z = d3
we set this up as a matrix equation of the form
P U = Q
where
P = [a1 b1 c1; a2 b2 c2; a3 b3 c3]
U = [x; y; z]
Q = [d1; d2; d3]
The solution of this system of equations is U = P-1 Q; this is accomplished in Matlab using
>> U = inv(P)*Q
or by using the backslash \ operator
>> U = P\Q
Exercise:
1. Set up Mesh Current Equations in the form R I = V and solve for the mesh currents, I.
2. Set up Node Voltage Equations in the form G V = I and solve for node voltages, V.
Loops
The for loop (very similar to C expression) is a simple command for setting up a loop. Example:
>> for i = 1:10;
>> a(i) = i*i;
>> end
>> a
a =
1 4 9 16 25 36 49 64 81 100
All statements between the for and the end statements will be executed as per the command specifications. Example of a for loop where the increment is not 1 would be >> for i = 1:3:20; ..... etc.
Type in
>> help for
for more details.
Plotting
The plot command is used for generating 1-D (functions of one variable) plots. Do >> help plot for complete details. Let's make a graph of y = sin(x), for x on the interval x=0, to x = 10.
>> x = [0:0.1:10]; (here .1 is the increment)
>> y = sin(x); (notice how the sin function operates on each element of the entire row vector x, to generate a nother row vector y)
>> plot (x, y)
Surface or 2-D (functions of two variables) plots are generated using the surf command. More on that later.
To clear a plot, type in >> clg (clear graph)
To generate another plot window, do >> figure
Printing
You can print a plot using the Print Option under the File Menu in the Figure Window. The text in the Command Window is printed similarly.
File Input/Output
The save and load commands are used for saving data to disk or loading data from disk, respectively.
To save values in a matrix or vector, called, for instance, y, do:
>> y = [1 2 3 4; 5 6 7 8];
>> save y.txt y -ascii
The -ascii option ensures that the data is saved in ASCII form, so that it can be read by other programs - Word, Excel Notepad, Wordpad, etc. Examine the file y.txt using one of these programs. The file is generated in the working directory (remember this? If not click here).
An ASCII data file dat.txt can be loaded using
>> load dat.txt
This provides a variable called dat in the Matlab workspace. All manner of vector/matrix operations can be performed on dat, just like any other variable.
Do >> help save and >>help load for learning all the load/save options.
After you read the next section, click here for a fun Matlab project - generating music with Matlab!
Executable files (m-files in Matlab)
Executable files in Matlab are generated by storing a list of Matlab commands in a file given the extension .m
These files are called M-files. To create an M-file, use the New...M-file Option under the File Menu in the Command Window. Type in the following commands in the M-File Editor Window:
x = [0:0.1:10];
y = cos(x);
plot(x,y)
xlabel('x')
ylabel('y')
title('A plot of Cosine(x)')
Save the file using the Save Option under the File Menu in the M-File Editor Window. Call it, say, cosineplot.m. Now, to run this program in Matlab, move over to the Matlab Command Window and just type in >> cosineplot
Tuesday, August 5, 2008
Mesothelioma: Questions and Answers
Mesothelioma is a rare form of cancer in which malignant (cancerous) cells are found in the mesothelium, a protective sac that covers most of the body's internal organs. Most people who develop mesothelioma have worked on jobs where they inhaled asbestos particles.
1. What is the mesothelium?
The mesothelium is a membrane that covers and protects most of the internal organs of the body. It is composed of two layers of cells: One layer immediately surrounds the organ; the other forms a sac around it. The mesothelium produces a lubricating fluid that is released between these layers, allowing moving organs (such as the beating heart and the expanding and contracting lungs) to glide easily against adjacent structures.
The mesothelium has different names, depending on its location in the body. The peritoneum is the mesothelial tissue that covers most of the organs in the abdominal cavity. The pleura is the membrane that surrounds the lungs and lines the wall of the chest cavity. The pericardium covers and protects the heart. The mesothelial tissue surrounding the male internal reproductive organs is called the tunica vaginalis testis. The tunica serosa uteri covers the internal reproductive organs in women.
2. What is mesothelioma?
Mesothelioma (cancer of the mesothelium) is a disease in which cells of the mesothelium become abnormal and divide without control or order. They can invade and damage nearby tissues and organs. Cancer cells can also metastasize (spread) from their original site to other parts of the body. Most cases of mesothelioma begin in the pleura or peritoneum.
3. How common is mesothelioma?
Although reported incidence rates have increased in the past 20 years, mesothelioma is still a relatively rare cancer. About 2,000 new cases of mesothelioma are diagnosed in the United States each year. Mesothelioma occurs more often in men than in women and risk increases with age, but this disease can appear in either men or women at any age.
4. What are the risk factors for mesothelioma?
Working with asbestos is the major risk factor for mesothelioma. A history of asbestos exposure at work is reported in about 70 percent to 80 percent of all cases. However, mesothelioma has been reported in some individuals without any known exposure to asbestos.
Asbestos is the name of a group of minerals that occur naturally as masses of strong, flexible fibers that can be separated into thin threads and woven. Asbestos has been widely used in many industrial products, including cement, brake linings, roof shingles, flooring products, textiles, and insulation. If tiny asbestos particles float in the air, especially during the manufacturing process, they may be inhaled or swallowed, and can cause serious health problems. In addition to mesothelioma, exposure to asbestos increases the risk of lung cancer, asbestosis (a noncancerous, chronic lung ailment), and other cancers, such as those of the larynx and kidney.
Smoking does not appear to increase the risk of mesothelioma. However, the combination of smoking and asbestos exposure significantly increases a person's risk of developing cancer of the air passageways in the lung.
5. Who is at increased risk for developing mesothelioma?
Asbestos has been mined and used commercially since the late 1800s. Its use greatly increased during World War II. Since the early 1940s, millions of American workers have been exposed to asbestos dust. Initially, the risks associated with asbestos exposure were not known. However, an increased risk of developing mesothelioma was later found among shipyard workers, people who work in asbestos mines and mills, producers of asbestos products, workers in the heating and construction industries, and other tradespeople. Today, the U.S. Occupational Safety and Health Administration (OSHA) sets limits for acceptable levels of asbestos exposure in the workplace. People who work with asbestos wear personal protective equipment to lower their risk of exposure.
The risk of asbestos-related disease increases with heavier exposure to asbestos and longer exposure time. However, some individuals with only brief exposures have developed mesothelioma. On the other hand, not all workers who are heavily exposed develop asbestos-related diseases.
There is some evidence that family members and others living with asbestos workers have an increased risk of developing mesothelioma, and possibly other asbestos-related diseases. This risk may be the result of exposure to asbestos dust brought home on the clothing and hair of asbestos workers. To reduce the chance of exposing family members to asbestos fibers, asbestos workers are usually required to shower and change their clothing before leaving the workplace.
6. What are the symptoms of mesothelioma?
Symptoms of mesothelioma may not appear until 30 to 50 years after exposure to asbestos. Shortness of breath and pain in the chest due to an accumulation of fluid in the pleura are often symptoms of pleural mesothelioma. Symptoms of peritoneal mesothelioma include weight loss and abdominal pain and swelling due to a buildup of fluid in the abdomen. Other symptoms of peritoneal mesothelioma may include bowel obstruction, blood clotting abnormalities, anemia, and fever. If the cancer has spread beyond the mesothelium to other parts of the body, symptoms may include pain, trouble swallowing, or swelling of the neck or face.
These symptoms may be caused by mesothelioma or by other, less serious conditions. It is important to see a doctor about any of these symptoms. Only a doctor can make a diagnosis.
7. How is mesothelioma diagnosed?
Diagnosing mesothelioma is often difficult, because the symptoms are similar to those of a number of other conditions. Diagnosis begins with a review of the patient's medical history, including any history of asbestos exposure. A complete physical examination may be performed, including x-rays of the chest or abdomen and lung function tests. A CT (or CAT) scan or an MRI may also be useful. A CT scan is a series of detailed pictures of areas inside the body created by a computer linked to an x-ray machine. In an MRI, a powerful magnet linked to a computer is used to make detailed pictures of areas inside the body. These pictures are viewed on a monitor and can also be printed.
A biopsy is needed to confirm a diagnosis of mesothelioma. In a biopsy, a surgeon or a medical oncologist (a doctor who specializes in diagnosing and treating cancer) removes a sample of tissue for examination under a microscope by a pathologist. A biopsy may be done in different ways, depending on where the abnormal area is located. If the cancer is in the chest, the doctor may perform a thoracoscopy. In this procedure, the doctor makes a small cut through the chest wall and puts a thin, lighted tube called a thoracoscope into the chest between two ribs. Thoracoscopy allows the doctor to look inside the chest and obtain tissue samples. If the cancer is in the abdomen, the doctor may perform a peritoneoscopy. To obtain tissue for examination, the doctor makes a small opening in the abdomen and inserts a special instrument called a peritoneoscope into the abdominal cavity. If these procedures do not yield enough tissue, more extensive diagnostic surgery may be necessary.
If the diagnosis is mesothelioma, the doctor will want to learn the stage (or extent) of the disease. Staging involves more tests in a careful attempt to find out whether the cancer has spread and, if so, to which parts of the body. Knowing the stage of the disease helps the doctor plan treatment.
Mesothelioma is described as localized if the cancer is found only on the membrane surface where it originated. It is classified as advanced if it has spread beyond the original membrane surface to other parts of the body, such as the lymph nodes, lungs, chest wall, or abdominal organs.
8. How is mesothelioma treated?
Treatment for mesothelioma depends on the location of the cancer, the stage of the disease, and the patient's age and general health. Standard treatment options include surgery, radiation therapy, and chemotherapy. Sometimes, these treatments are combined.
* Surgery is a common treatment for mesothelioma. The doctor may remove part of the lining of the chest or abdomen and some of the tissue around it. For cancer of the pleura (pleural mesothelioma), a lung may be removed in an operation called a pneumonectomy. Sometimes part of the diaphragm, the muscle below the lungs that helps with breathing, is also removed.
* Radiation therapy, also called radiotherapy, involves the use of high-energy rays to kill cancer cells and shrink tumors. Radiation therapy affects the cancer cells only in the treated area. The radiation may come from a machine (external radiation) or from putting materials that produce radiation through thin plastic tubes into the area where the cancer cells are found (internal radiation therapy).
* Chemotherapy is the use of anticancer drugs to kill cancer cells throughout the body. Most drugs used to treat mesothelioma are given by injection into a vein (intravenous, or IV). Doctors are also studying the effectiveness of putting chemotherapy directly into the chest or abdomen (intracavitary chemotherapy).
To relieve symptoms and control pain, the doctor may use a needle or a thin tube to drain fluid that has built up in the chest or abdomen. The procedure for removing fluid from the chest is called thoracentesis. Removal of fluid from the abdomen is called paracentesis. Drugs may be given through a tube in the chest to prevent more fluid from accumulating. Radiation therapy and surgery may also be helpful in relieving symptoms.
9. Are new treatments for mesothelioma being studied?
Yes. Because mesothelioma is very hard to control, the National Cancer Institute (NCI) is sponsoring clinical trials (research studies with people) that are designed to find new treatments and better ways to use current treatments. Before any new treatment can be recommended for general use, doctors conduct clinical trials to find out whether the treatment is safe for patients and effective against the disease. Participation in clinical trials is an important treatment option for many patients with mesothelioma.
1. What is the mesothelium?
The mesothelium is a membrane that covers and protects most of the internal organs of the body. It is composed of two layers of cells: One layer immediately surrounds the organ; the other forms a sac around it. The mesothelium produces a lubricating fluid that is released between these layers, allowing moving organs (such as the beating heart and the expanding and contracting lungs) to glide easily against adjacent structures.
The mesothelium has different names, depending on its location in the body. The peritoneum is the mesothelial tissue that covers most of the organs in the abdominal cavity. The pleura is the membrane that surrounds the lungs and lines the wall of the chest cavity. The pericardium covers and protects the heart. The mesothelial tissue surrounding the male internal reproductive organs is called the tunica vaginalis testis. The tunica serosa uteri covers the internal reproductive organs in women.
2. What is mesothelioma?
Mesothelioma (cancer of the mesothelium) is a disease in which cells of the mesothelium become abnormal and divide without control or order. They can invade and damage nearby tissues and organs. Cancer cells can also metastasize (spread) from their original site to other parts of the body. Most cases of mesothelioma begin in the pleura or peritoneum.
3. How common is mesothelioma?
Although reported incidence rates have increased in the past 20 years, mesothelioma is still a relatively rare cancer. About 2,000 new cases of mesothelioma are diagnosed in the United States each year. Mesothelioma occurs more often in men than in women and risk increases with age, but this disease can appear in either men or women at any age.
4. What are the risk factors for mesothelioma?
Working with asbestos is the major risk factor for mesothelioma. A history of asbestos exposure at work is reported in about 70 percent to 80 percent of all cases. However, mesothelioma has been reported in some individuals without any known exposure to asbestos.
Asbestos is the name of a group of minerals that occur naturally as masses of strong, flexible fibers that can be separated into thin threads and woven. Asbestos has been widely used in many industrial products, including cement, brake linings, roof shingles, flooring products, textiles, and insulation. If tiny asbestos particles float in the air, especially during the manufacturing process, they may be inhaled or swallowed, and can cause serious health problems. In addition to mesothelioma, exposure to asbestos increases the risk of lung cancer, asbestosis (a noncancerous, chronic lung ailment), and other cancers, such as those of the larynx and kidney.
Smoking does not appear to increase the risk of mesothelioma. However, the combination of smoking and asbestos exposure significantly increases a person's risk of developing cancer of the air passageways in the lung.
5. Who is at increased risk for developing mesothelioma?
Asbestos has been mined and used commercially since the late 1800s. Its use greatly increased during World War II. Since the early 1940s, millions of American workers have been exposed to asbestos dust. Initially, the risks associated with asbestos exposure were not known. However, an increased risk of developing mesothelioma was later found among shipyard workers, people who work in asbestos mines and mills, producers of asbestos products, workers in the heating and construction industries, and other tradespeople. Today, the U.S. Occupational Safety and Health Administration (OSHA) sets limits for acceptable levels of asbestos exposure in the workplace. People who work with asbestos wear personal protective equipment to lower their risk of exposure.
The risk of asbestos-related disease increases with heavier exposure to asbestos and longer exposure time. However, some individuals with only brief exposures have developed mesothelioma. On the other hand, not all workers who are heavily exposed develop asbestos-related diseases.
There is some evidence that family members and others living with asbestos workers have an increased risk of developing mesothelioma, and possibly other asbestos-related diseases. This risk may be the result of exposure to asbestos dust brought home on the clothing and hair of asbestos workers. To reduce the chance of exposing family members to asbestos fibers, asbestos workers are usually required to shower and change their clothing before leaving the workplace.
6. What are the symptoms of mesothelioma?
Symptoms of mesothelioma may not appear until 30 to 50 years after exposure to asbestos. Shortness of breath and pain in the chest due to an accumulation of fluid in the pleura are often symptoms of pleural mesothelioma. Symptoms of peritoneal mesothelioma include weight loss and abdominal pain and swelling due to a buildup of fluid in the abdomen. Other symptoms of peritoneal mesothelioma may include bowel obstruction, blood clotting abnormalities, anemia, and fever. If the cancer has spread beyond the mesothelium to other parts of the body, symptoms may include pain, trouble swallowing, or swelling of the neck or face.
These symptoms may be caused by mesothelioma or by other, less serious conditions. It is important to see a doctor about any of these symptoms. Only a doctor can make a diagnosis.
7. How is mesothelioma diagnosed?
Diagnosing mesothelioma is often difficult, because the symptoms are similar to those of a number of other conditions. Diagnosis begins with a review of the patient's medical history, including any history of asbestos exposure. A complete physical examination may be performed, including x-rays of the chest or abdomen and lung function tests. A CT (or CAT) scan or an MRI may also be useful. A CT scan is a series of detailed pictures of areas inside the body created by a computer linked to an x-ray machine. In an MRI, a powerful magnet linked to a computer is used to make detailed pictures of areas inside the body. These pictures are viewed on a monitor and can also be printed.
A biopsy is needed to confirm a diagnosis of mesothelioma. In a biopsy, a surgeon or a medical oncologist (a doctor who specializes in diagnosing and treating cancer) removes a sample of tissue for examination under a microscope by a pathologist. A biopsy may be done in different ways, depending on where the abnormal area is located. If the cancer is in the chest, the doctor may perform a thoracoscopy. In this procedure, the doctor makes a small cut through the chest wall and puts a thin, lighted tube called a thoracoscope into the chest between two ribs. Thoracoscopy allows the doctor to look inside the chest and obtain tissue samples. If the cancer is in the abdomen, the doctor may perform a peritoneoscopy. To obtain tissue for examination, the doctor makes a small opening in the abdomen and inserts a special instrument called a peritoneoscope into the abdominal cavity. If these procedures do not yield enough tissue, more extensive diagnostic surgery may be necessary.
If the diagnosis is mesothelioma, the doctor will want to learn the stage (or extent) of the disease. Staging involves more tests in a careful attempt to find out whether the cancer has spread and, if so, to which parts of the body. Knowing the stage of the disease helps the doctor plan treatment.
Mesothelioma is described as localized if the cancer is found only on the membrane surface where it originated. It is classified as advanced if it has spread beyond the original membrane surface to other parts of the body, such as the lymph nodes, lungs, chest wall, or abdominal organs.
8. How is mesothelioma treated?
Treatment for mesothelioma depends on the location of the cancer, the stage of the disease, and the patient's age and general health. Standard treatment options include surgery, radiation therapy, and chemotherapy. Sometimes, these treatments are combined.
* Surgery is a common treatment for mesothelioma. The doctor may remove part of the lining of the chest or abdomen and some of the tissue around it. For cancer of the pleura (pleural mesothelioma), a lung may be removed in an operation called a pneumonectomy. Sometimes part of the diaphragm, the muscle below the lungs that helps with breathing, is also removed.
* Radiation therapy, also called radiotherapy, involves the use of high-energy rays to kill cancer cells and shrink tumors. Radiation therapy affects the cancer cells only in the treated area. The radiation may come from a machine (external radiation) or from putting materials that produce radiation through thin plastic tubes into the area where the cancer cells are found (internal radiation therapy).
* Chemotherapy is the use of anticancer drugs to kill cancer cells throughout the body. Most drugs used to treat mesothelioma are given by injection into a vein (intravenous, or IV). Doctors are also studying the effectiveness of putting chemotherapy directly into the chest or abdomen (intracavitary chemotherapy).
To relieve symptoms and control pain, the doctor may use a needle or a thin tube to drain fluid that has built up in the chest or abdomen. The procedure for removing fluid from the chest is called thoracentesis. Removal of fluid from the abdomen is called paracentesis. Drugs may be given through a tube in the chest to prevent more fluid from accumulating. Radiation therapy and surgery may also be helpful in relieving symptoms.
9. Are new treatments for mesothelioma being studied?
Yes. Because mesothelioma is very hard to control, the National Cancer Institute (NCI) is sponsoring clinical trials (research studies with people) that are designed to find new treatments and better ways to use current treatments. Before any new treatment can be recommended for general use, doctors conduct clinical trials to find out whether the treatment is safe for patients and effective against the disease. Participation in clinical trials is an important treatment option for many patients with mesothelioma.
Sunday, August 3, 2008
Mesothelioma
Mesothelioma is a form of cancer that is almost always caused by previous exposure to asbestos. In this disease, malignant cells develop in the mesothelium, a protective lining that covers most of the body's internal organs. Its most common site is the pleura (outer lining of the lungs and chest cavity), but it may also occur in the peritoneum (the lining of the abdominal cavity) or the pericardium (a sac that surrounds the heart).
Most people who develop mesothelioma have worked on jobs where they inhaled asbestos particles, or they have been exposed to asbestos dust and fibre in other ways, such as by washing the clothes of a family member who worked with asbestos. Unlike lung cancer, there is no association between mesothelioma and smoking.[1] Compensation via asbestos funds or lawsuits is an important issue in mesothelioma (see asbestos and the law).
The symptoms of mesothelioma include shortness of breath due to pleural effusion (fluid between the lung and the chest wall) or chest wall pain, and general symptoms such as weight loss. The diagnosis can be made with chest X-rays and a CT scan, and confirmed with a biopsy (tissue sample) and microscopic examination. A thoracoscopy (inserting a tube with a camera into the chest) can be used to take biopsies. It allows the introduction of substances such as talc to obliterate the pleural space (called pleurodesis), which prevents more fluid from accumulating and pressing on the lung. Despite treatment with chemotherapy, radiation therapy or sometimes surgery, the disease carries a poor prognosis. Research about screening tests for the early detection of mesothelioma is ongoing.
For more information click here
HOPE
"Hope is the companion of power, and the mother of success; for who so hopes strongly, has within him the gift of miracles." -- Samuel Smiles
This segment begins with more information about malignant mesothelioma, including the causes of the disease and characteristic symptoms. Our comprehensive section on mesothelioma treatment options discusses surgery, chemotherapy, and radiation therapy as well as new types under investigation. We discuss ways to find specialists who treat mesothelioma and some advice on choosing your doctor . The Clinical Trials segment details current clinical studies and links to information specific to those trials.
SUPPORT
"Too often we understimate the power of a touch, a smile, a kind word, a listening ear, an honest compliment, or the smallest act of caring, all of which have the potential to turn a life around." --Dr. Leo Buscaglia
Start planning with Comprehensive Cancer Centers, how to find places to stay near treatment facilities and how to get there in the Travel & Lodging section. Relevant medical journal and mesothelioma news articles are updated regularly. Our SUPPORT segment ends with Survivors & Fighters who have uplifting stories to tell.
HELP
"Knowledge is power."-Francis Bacon
This segment provides Leading Cancer Links. In Your Peace of Mind you’ll find resources to help you and your family feel secure in the weeks, months and years ahead. Here you can find links to information on financial assistance, compensation, and legal options.
NEW: A clinical trial for a lung-sparing combined modality protocol is recruiting mesothelioma patients.
Monday, June 9, 2008
Contract Management Software
CobbleStone is a leader in Contract Management Software. We are among the first to offer a contract management software product and our products are the result of years of client feedback and industry knowledge.
Our mission is to provide the most robust and simple-to-use contract solution on the market. Our contract software solutions are designed to save your organization money while maximizing your productivity.
We offer two contract management solutions. To learn more about our enterprise contract management software solution select the Enterprise Edition link below.
Contract Insight Enterprise Edition - Contract Management Software
Contract Insight Enterprise is an enterprise level contract management tracking solution. It is designed for mid to large organizations. Contract Insight can streamline the entire contract tracking process - from creation to completion. It is designed to reduce contract expenses, increase your margins, and reduce your total cost of ownership. Contract Insight is extremely flexible and is based on years of client input. Our contract software offers an easy-to-use interface, custom fields, customer reports, online calendar, e-mail alerts, and a centralized repository. It is web-based and can be deployed on any operating system that runs a current web browser. I can be hosted by CobbleStone or installed on your organization's network. learn more
Contract Insight Desktop Edition - Contract Management Software
ContractInsight Desktop, Contract Management Tracking Software is a completely new, entry-level contract management and administration tool built from the ground up. It is based on our twelve plus years experience in the contract software market. Contract Insight desktop edition is a contract software designed for smaller organizations with 10 or less users. It is designed to track contracts, offer alerts, task management, and reports. It is the most simple and easy-to-use commitment based solution on the market. You can try it risk free by visiting Contract Insight Desktop Edition - Contract Management Tracking Software - Desktop Edition.
Our mission is to provide the most robust and simple-to-use contract solution on the market. Our contract software solutions are designed to save your organization money while maximizing your productivity.
We offer two contract management solutions. To learn more about our enterprise contract management software solution select the Enterprise Edition link below.
Contract Insight Enterprise Edition - Contract Management Software
Contract Insight Enterprise is an enterprise level contract management tracking solution. It is designed for mid to large organizations. Contract Insight can streamline the entire contract tracking process - from creation to completion. It is designed to reduce contract expenses, increase your margins, and reduce your total cost of ownership. Contract Insight is extremely flexible and is based on years of client input. Our contract software offers an easy-to-use interface, custom fields, customer reports, online calendar, e-mail alerts, and a centralized repository. It is web-based and can be deployed on any operating system that runs a current web browser. I can be hosted by CobbleStone or installed on your organization's network. learn more
Contract Insight Desktop Edition - Contract Management Software
ContractInsight Desktop, Contract Management Tracking Software is a completely new, entry-level contract management and administration tool built from the ground up. It is based on our twelve plus years experience in the contract software market. Contract Insight desktop edition is a contract software designed for smaller organizations with 10 or less users. It is designed to track contracts, offer alerts, task management, and reports. It is the most simple and easy-to-use commitment based solution on the market. You can try it risk free by visiting Contract Insight Desktop Edition - Contract Management Tracking Software - Desktop Edition.
Drug Rehab Programs
Does the drug rehab offer a variety of programs?
Alcohol and drug addiction is a disease that progresses through predictable stages. It takes a trained health professional, often a doctor specializing in addiction medicine, to make an accurate diagnosis and prescribe the most appropriate treatment.
A drug rehabilitation treatment center should offer a variety of treatment programs that meet individual needs. Programs may include inpatient, residential, outpatient, and/or short-stay options.
The difference between inpatient and a residential treatment center is that inpatient services are provided by a licensed hospital, while residential programs usually do not meet the same rigorous standards of medical care.
The length of stay depends on the severity and stage of the disease.
How much does a drug rehab center cost?
"How much does it cost?" is often one of the first questions asked.
The price tag for drug abuse & alcoholism treatment is presented in many different formats. You need to know what is included, what will be added to your bill as a fee-for-service program, and what services your health insurance will cover. This makes it extremely difficult to compare prices by simply asking the question - "What does it cost?"
If you are seeking the best value for your treatment dollar, remember: Price can be meaningful only in the context of quality and performance.
Is the drug rehab treatment program medically based?
There is an advantage to including on-site medical care in a Drug Rehab. Physicians and nurses provide 24-hour hospital services to monitor and ensure a safe withdrawal from alcohol and other drugs. In addition, a medical staff specializing in addiction medicine can oversee the progress of each individual and make necessary adjustments to the treatment plan.
Medical credentials and accreditation can also be important. For example, a chemical dependency Drug Rehab that earns JCAHO accreditation (Joint Commission on Accreditation of Healthcare Organizations) meets national standards for providing quality medical care. Appropriate state licensing is also an important consideration.
Be sure to ask which medical costs are included in the price of treatment at the drug rehab.
What is the degree of family involvement in a drug rehab program?
Drug abuse and alcoholism affects the entire family, not just the alcoholic/addict. Quite often family members do not realize how deeply they have been affected by chemical dependency. Family involvement is an important component of recovery.
Drug Rehabs vary in the degree and quality of family involvement opportunities. Some offer just a few lectures and others offer family therapy. Ask if there is any time devoted to family programs and if group therapy is included.
Does drug rehabilitation include a quality continuing care program?
There are no quick fixes for the diseases of drug abuse and alcoholism. Recovery is an ongoing process. The skills one learns during intensive rehabilitation treatment must be integrated into everyday life and this takes time.
Some drug addiction treatment programs will offer a follow-up program but only in one location which may make it difficult to use.
Drug rehabilitation treatment programs should include a quality, continuing care program that supports and monitors recovery.
Alcohol and drug addiction is a disease that progresses through predictable stages. It takes a trained health professional, often a doctor specializing in addiction medicine, to make an accurate diagnosis and prescribe the most appropriate treatment.
A drug rehabilitation treatment center should offer a variety of treatment programs that meet individual needs. Programs may include inpatient, residential, outpatient, and/or short-stay options.
The difference between inpatient and a residential treatment center is that inpatient services are provided by a licensed hospital, while residential programs usually do not meet the same rigorous standards of medical care.
The length of stay depends on the severity and stage of the disease.
How much does a drug rehab center cost?
"How much does it cost?" is often one of the first questions asked.
The price tag for drug abuse & alcoholism treatment is presented in many different formats. You need to know what is included, what will be added to your bill as a fee-for-service program, and what services your health insurance will cover. This makes it extremely difficult to compare prices by simply asking the question - "What does it cost?"
If you are seeking the best value for your treatment dollar, remember: Price can be meaningful only in the context of quality and performance.
Is the drug rehab treatment program medically based?
There is an advantage to including on-site medical care in a Drug Rehab. Physicians and nurses provide 24-hour hospital services to monitor and ensure a safe withdrawal from alcohol and other drugs. In addition, a medical staff specializing in addiction medicine can oversee the progress of each individual and make necessary adjustments to the treatment plan.
Medical credentials and accreditation can also be important. For example, a chemical dependency Drug Rehab that earns JCAHO accreditation (Joint Commission on Accreditation of Healthcare Organizations) meets national standards for providing quality medical care. Appropriate state licensing is also an important consideration.
Be sure to ask which medical costs are included in the price of treatment at the drug rehab.
What is the degree of family involvement in a drug rehab program?
Drug abuse and alcoholism affects the entire family, not just the alcoholic/addict. Quite often family members do not realize how deeply they have been affected by chemical dependency. Family involvement is an important component of recovery.
Drug Rehabs vary in the degree and quality of family involvement opportunities. Some offer just a few lectures and others offer family therapy. Ask if there is any time devoted to family programs and if group therapy is included.
Does drug rehabilitation include a quality continuing care program?
There are no quick fixes for the diseases of drug abuse and alcoholism. Recovery is an ongoing process. The skills one learns during intensive rehabilitation treatment must be integrated into everyday life and this takes time.
Some drug addiction treatment programs will offer a follow-up program but only in one location which may make it difficult to use.
Drug rehabilitation treatment programs should include a quality, continuing care program that supports and monitors recovery.
Vioxx Alert - 27,000 Victims
Merck & Co.’s arthritis drug Vioxx may have led to more than 27,000 heart attacks and sudden cardiac deaths before it was pulled from the market last week, the Wall Street Journal reported Wednesday, citing an unreleased study by government regulators.
Last week, Merck abruptly recalled Vioxx, an arthritis treatment and one of the company’s top-selling drugs, after an internal study showed that patients taking the drug were more likely to suffer a cardiac event than those taking a placebo.
The Journal’s report, citing a study by the Food and Drug Administration, said that from Vioxx’s approval in 1999 through 2003, an estimated 27,785 heart attacks and sudden cardiac deaths would have been avoided if Celebrex, a competing drug made by Pfizer Inc., had been used instead of Vioxx.....more
Last week, Merck abruptly recalled Vioxx, an arthritis treatment and one of the company’s top-selling drugs, after an internal study showed that patients taking the drug were more likely to suffer a cardiac event than those taking a placebo.
The Journal’s report, citing a study by the Food and Drug Administration, said that from Vioxx’s approval in 1999 through 2003, an estimated 27,785 heart attacks and sudden cardiac deaths would have been avoided if Celebrex, a competing drug made by Pfizer Inc., had been used instead of Vioxx.....more
Contact a Vioxx Attorney To Take Your Case!
If you have taken Vioxx and suffered a heart attack or stroke, call a qualified Vioxx attorney to preserve your legal rights and potential settlement. Vioxx attorneys listed on the right or left panel will be able to help you determine the best course of action in regards to your situation and/or claim, which could potentially include a Vioxx class action lawsuit if enough people in a given area suffer similar damages, or you may be better off filing an individual lawsuit claim. These LawInfo Lead Counsel qualified Vioxx attorneys will be able to provide the legal assistance you need, and can provide quality representation.
As soon as you contact a Vioxx attorney, you will know whether or not your damages will result in a settlement or litigation. While pharmaceutical and defective drug litigation, like Vioxx litigation lawsuits, are governed by federal laws, state statute of limitation laws may still apply. There is only a certain amount of time to evaluate your potential Vioxx class action lawsuit claim, contact Vioxx attorneys to take action now.
As soon as you contact a Vioxx attorney, you will know whether or not your damages will result in a settlement or litigation. While pharmaceutical and defective drug litigation, like Vioxx litigation lawsuits, are governed by federal laws, state statute of limitation laws may still apply. There is only a certain amount of time to evaluate your potential Vioxx class action lawsuit claim, contact Vioxx attorneys to take action now.
Structured settlement
A structured settlement is a financial or insurance arrangement, including periodic payments, that a claimant accepts to resolve a personal injury tort claim or to compromise a statutory periodic payment obligation. Structured settlements were first utilized in Canada and the United States during the 1970s as an alternative to lump sum settlements. Structured settlements are now part of the statutory tort law of several common law countries including Australia, Canada, England and the United States. Although some uniformity exists, each of these countries has its own definitions, rules and standards for structured settlements. Structured settlements may include income tax and spendthrift requirements as well as benefits. Structured settlement payments are sometimes called “periodic payments.” A structured settlement incorporated into a trial judgment is called a “periodic payment judgment."
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