Archive for the 'Science Hall' Category

Studying and Understanding Algebra

What is Algebra?

Mathematics has long been one of the most terrifying subjects in American schools. While in other countries graduate children excel in mathematics, most of the standard high school age students in the United States scratch their heads when confronted with questions about converting fractions to decimals, converting measures and units, solving quadratic inequalities, or solving radical equations . This situation is broad across the United States. Algebra consists of different complicated mathematical equations that it is easy for a pupil to get lost when asked to explain synthetic division or adding radicals. For that matter, letters are heavily employed for substituting the numbers when it comes to algebra. While this isn’t highly complicated in and of itself, it brings itself poorly to the ‘jump in and play’ aspect of some math. Simply talking, if a individual is supposed to execute a certain algebraic task, he or she should be aware of the algebraic tasks that preceded it. This is to say that Algebra is a process that expects mastery of every step in order to move on. A pupil can’t hope for finding square root radicals and roots when he or she has not mastered proportions and ratios, or converting measures and units.

Technological Aid for Algebra:

Although this is nothing new, it looks that math grades have slipped even further in recent years. The fault can be ascribed to many parties, but no solution will come out as a result of blame game. Lately, there have been extracurricular helps on the market to aid students groom mathematical skills when out of the classroom. What little software system or program there was, more geared towards aiding younger pupils grasp the concepts of arithmetic. Luckily, the market for such a product has coincided with the technology essential, providing an influx of ‘algebra computer software‘ or ‘algebra solver‘ programs that let the mastery of algebra to anyone who is equipped with primary computer knowledge.

Algebra Solvers:

The algebra calculators vary depending on the brand and the program. Some may provide some features as graphing a circle, or solving simultaneous equations , but may not have the programming necessary for solving exponential equations or adding exponents. It is up to the consumer to inquire upon what is available in the particular program, but many algebra solver computer software packages will advertise their features. The best bet for anybody who is interested in computer assistance for subtracting rational expressions or converting decimals to fractions; basically, whatever particular need you would have, is to consult the internet and research the product in question.

Published in: Mathematics Info, Schools + Colleges, Science Hall | on June 28th, 2009 | Comments Off

Testing and Health Indications Provide Steps into Diagnosis of Mesothelioma

Cancer of the mesothelium will show a few primary symptoms. The primary symptom of pleural mesothelioma is shortness of breath as a consequence of pleural effusion ” fluid being built up in the pleura, or membrane, encompassing the lung. Another common symptomis chest pain due to the tumor invading the chest wall. Additional symptoms include night sweats, weight loss and exhaustion.

The primary symptomof patients with peritoneal mesothelioma, which originates in the abdomen, is abdominal swelling due to fluid buildup in the abdomen (a condition called ascites), pain in the abdomen, and blockage of the bowel.

It is important to note that these symptoms could be caused by a myriad of diseases or conditions. Nevertheless, you should see a doctor if you have been exposed to asbestos and have experienced any of these symptoms.

Malignant mesothelioma is difficult to diagnose, because the symptoms are also experienced in less serious health issues. These symptoms include:

  • Having trouble breathing
  • Chest or lower back pains due to accumulated fluid in the pleura
  • Fever
  • Upset stomach
  • Raspy voice
  • Having trouble swallowing
  • Spitting up blood

Self-diagnosis should never be attempted. People suffering from the above symptoms should remain calm and consult a doctor. The standard way to confirm the condition is with a biopsy. A pathologist removes a piece of tissue from the suspected region and examines the biopsy which results in a very precise diagnosis. Biopsies are typically pain-free.

A CT scan (Computer Tomography is an option if you dont want a biopsy. A CT scan is basically an X-ray procedure where cross-sectional images are taken as a scanner rotates around the body. Sometimes, the patient ingests a dye that helps define the picture. CT scans have the advantage of being non-invasive and easier, and they are known to be an effective diagnostic tool. Opinion is divided as to whether the scan is more or less cost-effective than a biopsy. If irregularities are detected, a biopsy may also be ordered to determine if a tumor exists, and if so, whether it is malignant or benign. Diagnosis of pleural mesothelioma is also possible by testing a sample of fluid from the pleura for cancer cells.

Any of these methods may also be used to screen for mesothelioma. Patients are screened when they suspect they may be at risk but do not have typical symptoms, to catch the cancer early or to make sure the patient is not otherwise in danger. Patients should be screened for mesothelioma if they have a history of asbestos exposure.

Published in: Health, Science Hall | on June 19th, 2009 | Comments Off

Algebra and Abstractions

Algebra is the most crucial subdivision of mathematics. Although at first it may seem to just fly over your head, a lot exercising helps students to understand the study. One has to stay learning this field of study at higher educational stages like college, thus it is essential to create a sound base from the beginning.

Areas that are Difficult

Algebra includes many fields of study, graphing being one of them . This could include graphing a circle, graphing systems of non-linear equations , graphing inequalities or graphing quadratic equations. Some Other topic that is part of algebra has to do with exponents. This can range from subtracting exponents, dividing exponents or just using the laws of exponents. Rationalizing, factorizing, matrices, hyperbolas and quadratics all have to do with algebra.

Some pupils find algebra kind of awful. Even So, in today’s day and age that is not a problem as nearly each student has access to a computer. A scholar can easily use online maths computer programs that instruct and test pupils. These software programs also have worksheets to help pupils practice and improve their skills. Online tutors are also accessible and are easy to reach. These tutors charge an hourly rate and tutor students as if they were face to face.

Getting Aid with Algebra

There are a large number of computer software packages that can help students. These programs provide bit-by-bit guides to help pupils over their troubles. These software systems can help you with your homework, test readiness and even exam readiness! As algebra has a wide number of sub-sections you can choose computer software packages that link to your particular difficulty or problem. This could be fractional equations, inequalities, functions, or just graphing. Some packages also include games and videos that could further develop your algebraic skills.

Algebra calculators are one of the most main tools available for helping your skills in algebra. They can help solve many types of algebraic questions. Mostly these will include questions that have to do with fractional equations or non-linear inequalities. Different calculators allow you to construct graphs at the click of a button.

Though these computer software packages and other aids can help many individuals overcome a great number of problems, it is important that other resources are also employed for further heightening your algebra skills. Using these facilities for cheating would only be a loss to yourself. It is better to use them to check the answers of your homework assignments rather than using them to complete your homework.

Published in: Mathematics Info, Schools + Colleges, Science Hall | on May 20th, 2009 | Comments Off

World Wide Glaciers Are Thawing at an Alarming Rate

Glaciers are melting at a greater pace than at any time since measurements commenced, states The Express. Glaciologists from the International Glacier Monitoring Service, which tracks 32 glaciers across eleven mountain areas, estimate that between 1849 to 1972 glaciers receded at a mean pace of 30 centimetres a year. In between 1972 to 2002 the amount receding jumped to 65 to 80 centimeters per yr. From then the avg. has made up more than 1 metre per year. Last winter reported the highest reductions yet of 1.5 m.

Globally glaciers are withdrawing leastwise as quickly as those glaciers in the representative sample with potentially fateful results for nearby communities. In the immediate future there could be a lot more floods, whilst in the not so distant future, streams will dry up, leading to keen mains water dearths.

Chamonix, it has a high no. of glaciers, the results of climate change and the receding of glaciers will be keenly felt. Perhaps this is why numerous companies and residents are more cognizant of the issues and therefore essaying to undertake measures to reduce the carbon output. Hopefully it’s not too late to arrest the consequences of global climate change and secure an environment for our children. Thus if you’re going to travel to Chamonix then beware of your mode of transport.

Published in: Science Hall | on January 31st, 2009 | Comments Off

Perfect Lawns, is it worth it?

Have you ever been driving down the road with the windows open going past a golf course or a field and then you get a strange smell? A chemical type of odor? Or go walking in the country and notice a large area, usually a field, all brown with dead grass. And next to it, alive green grasses and shrubs? Chances are you smell a herbicide being used or you are seeing what it can do to vegetation.

Then you start to wonder. Are those chemicals getting into the water table? Is wildlife eating the “treated” vegetation and insects tainted with the chemicals? Or maybe we are taking in the toxins and not even realizing it. It could possibly be in the foods we eat, the air we are breathing everyday or the water that we are drinking.

DDT is a colorless contact insecticide that is very toxic. It became banned in the early 1970’s. Gaylord Nelson, a great environmentalist while in office in the state of Wisconsin diliengtly worked to get DDT banned in Wisconsin.

DDT even though restricted is still used in Mexico to control malaria. The National Institute of Public Health of Cuernavaca, Morelos, Mexico concluded from a study that the use of DDT has been linked to breast cancer in Mexico. In another study done by the University of Michigan, it was found that chemical factory workers that made DDT also had a high risk of pancreatic cancer from the overexposure of DDT. Unfortunately, DDT is still being manufactured and used in tropical areas for malaria control.

Below are some of the herbicides used today. This is not a complete listing of all of the herbicides on the market. The short term and long term side effects is based that the Maximum Contaminant Level (MCL) goes over a certain marker for parts per billion (ppb) in the water. For example Simazine is 4 ppb or 4 parts per billion in drinking water.

Simazine:
Common Trade names: Herbazine, Herbex, Surflan
General Uses: Corn Crops, Christmas Trees
Amount Used Annually: 4.8 billion pounds estimated in 1985
Short Term health Effects: weight loss, changes in blood
Long Term Health Effects: tremors, damage to testes, kidneys, liver, thyroid, cancer
Ground Water Implications: It may leach to ground water. It can last from a few months to years.
(EPA Consumer Fact Sheet)

Picloram:
Common Trade names: Agent White, Tordon
General Uses: Control annual weeds
Amount Used Annually: 300,000 pounds estimated in 1982
Short Term health Effects: weight loss, damage to the nervous system
Long Term Health Effects: liver damage
Ground Water Implications: It may leach to ground water. It can last from a few months to years
(EPA Consumer Fact Sheet)

Glyphosate:
Common Trade names: Roundup, Sonic, Rodeo, Tumbleweed,
General Uses: Used on many food crops and roadsides
Amount Used Annually: 18.7 million pounds recently
Short Term health Effects: congestion of the lungs, increases breathing rate
Long Term Health Effects: kidney damage, reproductive effects
Ground Water Implications: It strongly adheres to the soil with little potential for leaching to ground water.
(EPA Consumer Fact Sheet)

Endothall:
Common Trade names:Accelerate, Endothall Turf Herbicide, Herbicide 273,
General Uses: Used on many food crops and control aquatic weeds
Amount Used Annually: 1.5 million pounds in 1982
Short Term health Effects: depressed breathing and increase heart rate
Long Term Health Effects: increase size of some organs.
Ground Water Implications: It can leach through the soil into the ground water.
(EPA Consumer Fact Sheet)

Dinoseb:
Common Trade names:Dow Selective Weed Killer, Hel-fire, Caldon, Knox-weed, Premerge,
General Uses: used for cereal crops
Amount Used Annually: 6.2 million pounds in 1982
Short Term health Effects: sweating, mood swings, headache
Long Term Health Effects: decreased body and thyroid weight, degeneration of testes,.
Ground Water Implications: It can leach through the soil into the ground water. Degrades very slowly.
(EPA Consumer Fact Sheet)

Atrazine:
Common Trade names:Aatex, Candex, Atred, Cyazin, Griffex Primatol,
General Uses: used for corn and soybean crops
Amount Used Annually: No figures are known, 2nd highest herbicide used
Short Term health Effects: congestion of the heart, lungs, and kidneys, low blood pressure, muscle spasms, weight loss, damage to adrenal glands
Long Term Health Effects: weight loss, cardiovascular damage, retinal and muscle degeneration, and cancer
Ground Water Implications: It can leach through the soil into the ground water. Degrades very slowly. Very powerful herbicide.
(EPA Consumer Fact Sheet)

Taking in consideration that municipalities have their water tested on a regular basis, this does not take into account the urban and rural areas with its own private wells. Generally that is where a lot of herbicide is used for crops. Also in the city locations one has to take in account the air you breathe.

About the Author:
Kevin Doberstein enjoys wildlife and nature while hiking in the Wisconsin great outdoors. He is also the owner of Nature Boy Natural Images This web site displays outdoor wildlife and nature photography.
He also has the Wisconsin Recreation Outdoors and Wildlife blog
The Wisconsin Outdoor Recreation and Wildlife Blog is for promoting and protecting nature and wildlife resources in the state of Wisconsin.

If you cite this article, use this description for reference:

Doberstein, Kevin 2005, Perfect Lawns, Is it Worth It? The Dangers of Herbicides. Nature Boy Natural Images

Resources:

University of Michigan School of Public Health, Ann Arbor 48109-2029.
National Institute of Public Health, Cuernavaca, Morelos, Mexico.
The Bioremediation and Phytoremediation of Pesticide- contaminated Sites Prepared by Chris Frazar National Network of Environmental Studies (NNEMS)
EPA Consumer Fact Sheet

About the Author

Kevin Doberstein enjoys wildlife and nature while hiking in the Wisconsin great outdoors. He is also the owner of Nature Boy Natural Images This web site displays outdoor wildlife and nature photography.
The Wisconsin Recreation Outdoors and Wildlife blog

Published in: Science Hall | on March 28th, 2008 | Comments Off