Wednesday, July 18, 2012

Creating the Best Math and Science Educational Experiences for Youth

In the almost 15 years since I've graduated from high school I've notice the major changes in how children are educated. I feel like I'm not old enough to be say when I was a kid things were different, but I'm saying that on a regular basis. When I was a child, parents and educators seemed to work together more to provide a quality education for children. There were learning experiences both at home and in school. I have memories of conducting science experiments both at home and in school as early as elementary school. However, I am realizing that kids today don't have the same opportunity that I did during my K-12 education.

All students don't have an equal opportunity to have a great science educational experience. I have been spending time in schools and am realizing that kids aren't engaged in enough hands on science or science that is relevant to them that make them interested in science. I was having a conversation with a 5th grader and he was talking about what he learned in science class that day. What they learned bored me to death, they were talking about a scientist that is dead and technology that is obsolete. I know that science history is an important part of science, but kids should be learning something that is relevant and current and about scientists that are alive today. But thing that I was grateful was that at least this student was learning science. I'm always curious how the state science and mathematics standards are chosen. Is the curriculum team made up of a diversity of math and science educators and professionals? Do they select the material based that provide the students with a strong foundation as well as engage them in the subjects? Do they select a curriculum that all school districts will be able to implement, including those districts and schools with limited resources? Do they consider if the curriculum is academically preparing them for post secondary education and pursuing careers in these subjects? I believe that a strong curriculum should include all these elements to ensure the academic success of our children in math and science.

Tuesday, July 10, 2012

Life Science Education Using More Advanced Tools

For most students there are few courses more exciting than those that deal with life science education. The study of life as we know it is a dynamic and intensely detailed experience and has immediate application to all walks of life. It's one thing to study math and then notice similarities in your day to day patterns but it's quite another thing to study life science and then realize the cellular structure that your memorizing is actually one that is in your own body.

As such it's important to make sure you're on track when you're learning life science. One of the best ways to learn is to simply purchase one of the many learning courses available for computer use. There are a number to pick from but it's worth checking them out a bit so you make sure that you're getting the type of life science education that you learn best from and that way you'll actually use the course and learn from it.

The first thing to notice is whether or not the technical specifications fit your computer. Make sure that the course is compatible with your operating system so that you don't wind up paying for something you can't use. A lot of the courses these days are available via the internet and while that is handy it's less reliable than simply owning the course yourself and using it whenever you want regardless of the state of your internet connection.

Monday, June 25, 2012

Worldviews Used In Teaching Homeschool Science

Worldviews are the ways in which science facts are framed when they are taught. The most common worldviews are those of Creationism and Materialism and some may include Darwinism and Intelligent Design. These are opposing models, diametrically disparate with strong proponents on each side of the fence. So is it possible to teach homeschool science in a way that honors both types of framework? Actually there is - and here's why it's important to make your child aware of them all.

The Different Worldviews

In a very basic manner, all worldviews used to frame homeschool science teaching fall into one of two categories: theological (Creationism) or materialistic (Darwinism).

The Creationistic worldview defines all things in science as God's creations. Since God created everything in the world, the student only learns the concepts of science that fit into that particular framework.

Thursday, June 14, 2012

How to Collect Forensic Science Fingerprints Using Latent Print Powders at the Crime Scene

Latent Fingerprint development has challenged crime scene investigators for decades. Collecting forensic science fingerprints has evolved from the early use of lampblack (soot) to complex formulations that incorporate some sophisticated chemistry. This article will examine the use of latent fingerprint powders-included will be the whys and wherefores of latent powder formulations.

Latent print powders are divided among several different categories-each category having very specific uses. The first consideration for the crime scene investigator to examine is the type of surface expected to yield latent prints:

Porous Surfaces: This includes paper, cardboard and raw wood. Unless latent prints are suspected to be reasonably fresh, latent print powders are not of much use on non-porous surfaces, since the moisture content disperses into the substrate and ridge detail is lost.

Non-Porous Surfaces: This is where latent powders most often come into play. The problem is, however, that all non-porous surfaces have different characteristics that require a specific formula of latent powder.

Saturday, June 2, 2012

How to Calculate the Molarity of a Solution

Concentration has many units but the most commonly employed unit is Molarity. It is defined as the total number of moles of a solute that are dissolved in a liter of a solution. The method for calculating molarity is not so difficult rather it is a quite easy task and little practice can make you an expert in it.

The most important thing for calculating molarity can be derived simply by the unit of molarity i.e. moles of solute in addition to the liters of solution.

A very trouble-free example is given here which is solved with a very easy method and it covers almost all the steps that a molarity problem can suffer from:

Question: 10 grams of NaHCO3 are sufficient to make a saturated solution containing the volume of 500 milli-liters. Calculate molarity of this solution?

Solution:

If we closely observe this example, then it does not contain either of the parameters that are written in the formula of molarity i.e. moles of solute and liters of solution. But here weight of solute is given in grams and volume of solution is given in milli-liters.

Monday, May 21, 2012

What the Heck Is an Electromagnetic Waveguide?

Many people ask themselves this question upon hearing the term "electromagnetic waveguide." The most basic description of a waveguide is a sort of tube that directs electromagnetic waves from one end to another. Many times, these waves are microwave frequency when dealing with electromagnetic waveguide. There are also optical waveguides that direct a different spectrum of waves. The most common optical waveguide is fiber-optic cable, like the ones used for many modern television and internet companies.

Electromagnetic waveguides specifically transmit waves like radio and microwaves from point to point using a metal pipe or tube. Waveguides are actually an integral part of most peoples' daily lives, whether they are actively aware of this or not. Your microwave, radio, televisions, and most common electrical appliances have many waveguides. Waveguides are an integral part of most of the technology that everyone uses on a daily basis.

The basic principles behind waveguides are that they use metal to reflect the waves across a distance. The waves bounce off the walls while moving forward, sort of like a pinball action. In a dielectric waveguide, like a coaxial cable that most cable boxes used up until recently, the wave moves through a solid piece of metal. This method does not bounce the wave around like a pinball, but rather conducts the wave through a metal wire. Coaxial cables usually employ copper as the conductive metal; a dielectric material covers the copper and allows the wave to continue to move through with minimal leakage.

Tuesday, May 8, 2012

Why God Particle Demonstration Is a Flop Show?

Higgs Boson later renamed as God Particle by Leon M. Lederman in 1993 was speculated for the first time in 1962 by Philip Warren Anderson on the basis of mathematical-logical derivation having roots in the then contemporary beliefs of Physicists. It was further speculated that once its existence, even if transient, is experimentally proved, then it shall be possible to explain entire cosmic phenomena on its basis right from origin of universe up to evolution of man and even thereafter.

Therefore, it was not surprising that a large number of Physicists got down to the task of speculating the experimental conditions under which transiently existent God Particles can be demonstrated. A group of Physicists visualized that if in a linear accelerator, Hydrogen Particles are accelerated to the velocity of light, it should be possible to demonstrate its existence. Hence at CERN, Large Hadron Collider experiment was conceived and implemented.

Scientists at CERN built world's largest linear particle accelerator 27 kilometers long, 175 meters below the surface of earth across Franco- Swiss border at Geneva. After spending huge amount of time and money the experiment was commissioned on 10th September, 2008 and the world waited anxiously for the final announcement affirming existence of God Particle. However even after nearly 4 years, there are only assurances and final announcement is still awaited.

Sunday, April 22, 2012

Wire Processing and Wire Integrity Testing

Wires and cables have lifetime limitations due to normal material degradation, vibrations and stresses that they come under, and the collateral damage that occurs during normal maintenance. Aging wiring can result in degraded performance due to accumulated damage from long-term exposure to chemical, thermal, electrical and mechanical stress.

These failures often appear as broken conductors, corrosion and damaged insulation which can disrupt electrical signals and /or lead to arcing. Arcing is a form of short circuit that arises when wiring with ruptured insulation come in contact with metallic structures or other exposed wiring in moisture. When this occurs, there is usually a high energy flashover which could lead to a fire even before the circuit breaker is triggered. Arcing also increases signal loss and distortion on live signal through the wire.

Electric arcing occurs not only as an electrical failure but as a contributor to all other failure modes. Maintenance and assurance of the integrity of the wiring is very challenging due to the risk involved in accessibility e.g nuclear plants, as well as due to the high density of wiring network e.g onboard aircraft and ships. For instance, modern jet transport aircraft contains hundreds of kilometres of wires.