Ballistics Assignment

 Forensics  Comments Off
Jan 282010
 

Firearms Identification

Go to www.firearmsid.com. On the left side under ‘classroom’ click on student login. Use the log-in key I told you in class and type in your full name. Click accept. In the classroom area you (each individual) must complete the following tasks:

1. Complete the Cartridge Case ID-VCM (Test 1).  You must score a 75% or better. **
2. Complete the Firearm Identification quiz (50 questions) located here.  You must score an 80% or better.**  Use your real name on the page.  When you score an 80% or better, print the results page as proof and bring it to class to show me.
3. Complete the Bullet ID-VCM (Test 1).  You must score a 75% or better.**
4. Answer the questions below.

** – if you do not obtain the above scores you will receive a zero.  You may take the quiz/VCM more than once until you obtain the necessary score. This is an all or nothing assignment.

To answer the following questions you should read the information on the site. If you click on the Bullet ID-VCM link and the Cartridge Case ID-VCM link the resultant pages lists several links to find the necessary information.

1. What does GRC stand for?
2. Give an example of a typical GRC.
3. Do firearms change much over time? Will the 300th bullet have the same marks as the 3rd bullet?
4. What two characteristics do they obtain from a bullet fired from a firearm?
5. What marks do they obtain from a cartridge or cartridge casing?
6. What is meant by a bullets caliber?
7. What is a cartridge?
8. Do all bullets fit in all cartridges?
9. Give 2 examples of named cartridges.
10. What is the difference between your two examples? (advantage/disadvantage of one over the other)
11. What is a rifling impression? What causes it?
12. Why does a barrel have rifling?
13. What are the raised areas between grooves called?
14. If you have a rifling pattern of 6 grooves, how many lands do you have?
15. Why would a firearm examiner use a water tank and how big is a typical tank?
16. What is a comparison microscope?
17. Where on the bullet are the best marks typically seen?
18. What is typically the biggest problem with making an identification of an evidence bullet?
19. What causes Impression Action Marks?
20. Describe what causes each of the 3 impression marks. Which is the most common?
21. Checkout the bullet through gelatin picture from my forensics page. What causes the funnel shape behind the bullet?

Due:  Thursday, 2/4/10

How Nerves Work

 Neuroscience  Comments Off
Jan 252010
 

Read pages 362-390 and answer the following chapter review questions…

1,3,5,6,10,11,13,15-21,  CA #1

Jan 222010
 

The Earth Policy Institute issued the following press release detailing recent data on how the use of food to produce automobile fuels is affecting world starvation levels.  As a society we must become more innovative in developing new methods of powering automobiles and other devices.  In this new century we must let go of the antiquated combustion engine and not simply try to replace one fuel with another.  The environment and the people of the world deserve better.

Earth Policy Release
January 21, 2010

DATA HIGHLIGHTS – U.S. FEEDS ONE QUARTER OF ITS GRAIN TO CARS WHILE HUNGER IS ON THE RISE

http://www.earthpolicy.org/index.php?/press_room/C68/2010_datarelease6

The 107 million tons of grain that went to U.S. ethanol distilleries in 2009 was enough to feed 330 million people for one year at average world consumption levels. More than a quarter of the total U.S. grain crop was turned into ethanol to fuel cars last year. With 200 ethanol distilleries in the country set up to transform food into fuel, the amount of grain processed has tripled since 2004.

The United States looms large in the world food economy: it is far and away the world’s leading grain exporter, exporting more than Argentina, Australia, Canada, and Russia combined. In a globalized food economy, increased demand for food to fuel American vehicles puts additional pressure on world food supplies.

From an agricultural vantage point, the automotive hunger for crop-based fuels is insatiable. The Earth Policy Institute has noted that even if the entire U.S. grain crop were converted to ethanol (leaving no domestic crop to make bread, rice, pasta, or feed the animals from which we get meat, milk, and eggs), it would satisfy at most 18 percent of U.S. automotive fuel needs.

When the growing demand for corn for ethanol helped to push world grain prices to record highs between late 2006 and 2008, people in low-income grain-importing countries were hit the hardest. The unprecedented spike in food prices drove up the number of hungry people in the world to over 1 billion for the first time in 2009. Though the worst economic crisis since the Great Depression has recently brought food prices down from their peak, they still remain well above their long-term average levels.

The amount of grain needed to fill the tank of an SUV with ethanol just once can feed one person for an entire year. The average income of the owners of the world’s 940 million automobiles is at least ten times larger than that of the world’s 2 billion hungriest people. In the competition between cars and hungry people for the world’s harvest, the car is destined to win.

Continuing to divert more food to fuel, as is now mandated by the U.S. federal government in its Renewable Fuel Standard, will likely only reinforce the disturbing rise in hunger. By subsidizing the production of ethanol, now to the tune of some $6 billion each year, U.S. taxpayers are in effect subsidizing rising food bills at home and around the world.

For more information on the competition between cars and people for grain, see Chapter 2 in Plan B 4.0: Mobilizing to Save Civilization (New York: W.W. Norton & Company, 2009), on-line for free downloading with supporting datasets.
Feel free to pass this information along to friends, family members, and colleagues!

Surprises in Your Genes

 Biology  Comments Off
Jan 192010
 

Listen to this NOVA podcast regarding evolution, development and genes.  As written in their own description…

In order to develop from an embryo, animals as different as fruit flies and humans call on a nearly identical set of genes. But how does this one common genetic toolkit create so many different species? It turns out that it’s not the genes you have-it’s how you use them.

Podcast produced by David Levin. Original interviews by John Rubin. NOVA is produced by WGBH in Boston. Funding for NOVA is provided by ExxonMobil, David H. Koch, the Howard Hughes Medical Institute, the Corporation for Public Broadcasting, and public television viewers.

To learn more, go to pbs.org/nova/evolution

[mp3-jplayer]

For more NOVA ScienceNow podcasts, visit their RSS feed here.

The Spirit of the Times

 Main  Comments Off
Jan 192010
 

Checkout Google’s Zeitgeist 2009 to take a look back at 2009 through the eyes of Google.  See what billions of people around the world were searching for throughout the year – the results may surprise you.

Anatomy Case Study Test

 Anatomy  Comments Off
Jan 112010
 

There will be a test on Thursday, 1/14/10 on the material from the Hockey Case Study up through and including part 4.  The test will also include information from the practical regarding identification and functions of the internal organs/parts.

Jan 112010
 

There will be a test on the peripheral nervous system.  This includes information from the assigned textbook readings as well as notes in class.  Topics include, but are not limited to, dermatomes, cranial nerves, eyes/vision, ears/hearing, taste and smell.

Biology Chapter 2 Test

 Biology  Comments Off
Jan 112010
 

There will be a test on chapter 2 on Thursday, 1/14/2010.  The test will include material from the textbook, the chapter question sheet and from notes covered in class.

Forensics Test

 Forensics  Comments Off
Jan 102010
 

There will be a test on Thursday, January 14. 2010. The test will be on all material covered in class with specific attention to the material from the “product tampering” case study, mass spectrometry, fingerprinting, and counterfeit money.

 

http://www.grand-illusions.com/opticalillusions/ – Visit this site to view various ways to fool your eyes.  Definitely try “An Intriguing After Image” on ‘page 2′.

http://www.toledo-bend.com/colorblind/Ishihara.asp – Visit this site to take a test for color blindness. (Ishihara Test)

http://cim.ucdavis.edu/EyeRelease/Interface/TopFrame.htm – Visit this site to practice with the “Eye Simulator” version 2.  Take notes on how damage to different muscles or nerves affects the movement abilities of the eye.  You will need to click on “Eye Movement Simulator”  You can also feel free to explore the pupil response simulator and the patient cases.  This site is very cool.

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