CHAPTER 3:
3.1: Formulation of Mathematical Model
Consider the impact of a bullet on a fabric of soft armor made up of interlinked and crisscrossed yarns. The fabric consists of n layers stacked above one another. The bullet carries a momentum which it transfers to the yarns in the fabric. These yarns, due to their capability to quickly dissipate the energy of the bullet by transferring it to neighboring yarns in all directions, prevent the bullet from passing through. The mechanism of the bullet impact and the subsequent stoppage can be modelled as given below.
Figure 3.1: schematic study of bullet hitting ballistic armor
Let the mass of the fired bullet be Mb. It is fired at an initial velocity of v. The momentum
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Energy absorbed= volumetric energy density* volume =1/2*Y*volume*(strain)^2 (4)
The volume is given by, volume= n m A c*dt (5)
Here, c= Velocity of the sound in the armor material
From equations (4) and (5), we get,
Energy absorbed=1/2*Y*n m A c∫_0^t▒〖∈^2 (t)dt〗 (6)
The strain is integrated with time from the time of impact to the time of failure as it keeps on changing during the impact of the bullet and is not constant.
The change in kinetic energy of the bullet is given by: Change in kinetic enregy= 1/2 M_b (V_f^2 - V_i^2 ) (7)
Where, Vf = Final velocity of the bullet Vi = Initial velocity of the bullet
The energy absorbed by the fabric in the armor is equal to the loss of kinetic energy carried by the bullet during impact.
Energy absorbed by armour =change in kinetic energy of
The following results helped obtain the haplogroup that in which the sequence of mtDNA would identify. The PCR reaction worked, and this can be determined by looking at the agarose gel in figure 1. If the PCR reaction was successful, than a band should appear around 550bp. Individual AC displays a band around 550bp, this means the PCR reaction was successful. The band for individual AC, depicts a low concentration of product, because the band faint. After the purification process the concentration, A260/280 ratio, and A260/A230 ratio were determined by using the nanodrop. The concentration of mtDNA in the product was 60.9 ng/uL. The ratio for A260/280 was 1.79 and the ratio for A260/230 was 0.77. The A260 and 280 are a spectrometer measurement that measure absorbance at wavelengths of
In quadrants 1 and 2 how the amount and constituents of the fingerprint residue on the substrate affects the fingerprint image, is determined. In quadrant 1, excess sebum and moisture is first removed from the finger tips with the help of a clean cloth. In quadrant 2, fingertip is first wiped around the nose or forehead to create excess sebum. Quadrant 3 and 4 were used to compare the details between untreated and dusted fingerprint residues.
energy ($\omega$). Solid lines are CRPA cross sections and dashed lines are HF cross sections.
We found the density of the unknown object #6 to be 5.9(g/mL). We then use the table to identify the metal, and the result is that the name of the metal is zinc. Since the density of zinc is 7.14 and that is the closes number to our density, we determine that our unknown object is zinc. Our average density for the unknown liquid #5 is .779(g/mL). The closes density of a known liquid on the table is .792(g/mL), so we concluded that our liquid #5 is cyclohexane which has a density of
The board hardware inputs for A, B, and C are switches SW[2], SW[1], and SW[0], respectively. Add these input pins to your schematic. You will also need the complements of these signals as well and will need to add three not gates. Label the pins and wires as shown below, using Properties to change the names. If you forget how to do this step, refer to the wiring tutorial instructions, included as part 0 of this lab.
This lab provided a virtual environment that simulated a corporate WAN network. Having a similar network environment at the organization I am currently employed at, I have some experience with vulnerability scanning. I do not have much experience using the nmap utility however, so I was interested to get some experience by completing the tasks within this lab. I didn’t experience many challenges following the steps in the lab itself. I was able to launch the environment successfully and perform the steps without any issue. As with any new environment, it took me a little time to figure out the layout of the simulation and how it functioned. After reading the documentation and spending about ten minutes clicking through the different areas, I felt comfortable and began the steps of the lab.
You are in charge of the security of information in a research lab. Most of the information is stored in electronic format on the LAN. The researchers can also access these files from their homes. The computers in the lab are also connected to the Internet. The current access is provided to Internet via a combination router-firewall. The entire network resides behind this single firewall-router configuration. It is quite important to maintain the confidentiality of the information, although the lab has limited funds allocated for security. There are 8 workers that use the network connections.
In this lab, many more options were explored with Windows servers. The topics covered were Group Policies and Password Settings Objects. Both of these features of Windows Active Directory allow for very granular settings to be set across the network. These include a wide range of settings that one most likely would not even think of. I have personally worked with both Active Directory and Group Policies quite extensively so neither of these were new topics for me to learn. However, I had never worked with Password Setting Objects before so that was a learning experience. All of these features are useful in any enterprise production network and are highly valuable skills to have.
The digital platform is structured around two pillars: firstly, Healthify must ensure the highest standard of privacy and security in handling sensitive health information. Secondly, since the aim of doc.com is to unify all of Canada’s health care providers under one platform, Healthify must ensure redundancy, data safety, and extremely minimal down time. Should a problem similar to that affecting the Phoenix payroll software occur, the healthcare system would be crippled. In order for it to be effective, stakeholders must be confident in doc.com’s performance. Given that doc.com will handle vast amounts of personal information, the platform will be closed. Open sourcing can be beneficial for certain pieces of software,
Discuss security standards and methods, including the need for data storage integrity and data backup and recovery. In addition to complying with Health Insurance Portability and Accountability Act (HIPPA), SMC needs to be valiant in how the organization will protect information and manage network security. Information security is the protection of information against risk to its integrity, inadvertent disclosure, or availability (Hawkins, 2013a). The most common threats an organization's network will face are hackers, spyware, viruses, worms, Trojan horses, and malicious insider (Hawkins, 2013a). To protect SMC from hackers, they will use firewalls and intrusion-detection devices. Firewalls protect network systems by obstructing unauthorized entry while allowing approved communications (Hawkins, 2013a). Intrusion-detection systems monitor who the user is and what the user accesses. To promote HIPPA, SMC will track the last names of users who accessed patients with the same last name to reveal inappropriate use of client information.
Humans throughout recorded history have used various types of materials as a body armor to protect themselves from injury in combat and other dangerous situations. The first protective clothing and shields were made from animal skins. Eventually, metal was also used as body armor, what we now refer to as the suit of armor associated with the knights of Middle Ages. (“Bellis,Marry”). During the middle ages, an Italian named Filippo Negroli was known to be knowledgable in fashioning steel. His skills were commissioned by the Duke of Ubino. Together, they have marked the production of the very first kinds of bulletproof clothing. However, the vest’s, heaviness and restriction to movements made their especially designed body armor became a problem rather than an advantage during the war. Together with the minds of other people who
An elastic collision is a collision in which kinetic energy is conserved, such as when a running back is hit so hard by the opposing team’s linebacker on a lead-draw play up the middle that the ball is forced out of his arms. The fumbled ball then hits the turf and because of the elasticity of the collision it bounces back up. Unlike an elastic collision, an inelastic collision does not conserve the kinetic energy of the colliding objects (Kirkpatrick & Wheeler 134). An example of an inelastic collision might be when a player catches the ball (if he catches the ball) and the momentum of the ball is completely stopped. However it is important to realize in this study of physics that a
BulletSafe vests include woven high-density polyethylene, which is the identical material commonly used by security and police departments. The material is flexible, not a plate of armor. BulletSafe is comparable to other vests like Safeguard, BulletBlocker, Second Chance, GH Armor Systems and Point Blank. DragonSkin material is different and is comprised of a number of small hard plates which overlap similar to scales. The idea is to produce a flexible armor that is hard. Our vests consist of soft armor along with a flexible ballistic material. DragonSkin was created specifically to protect combat soldiers from rifle fire. The design of our vests is to protect users against bullets from handguns which are most common in crime situations. We provide ceramic ballistic plates to protect against rifle rounds and they are not flexible. They come in 10 X 12-inch sizes and are fitted into the plate pockets at the front and back of the BulletSafe
Bulletproof skin was grown within the laboratory and immediately put to the test to test its reliability. A bullet was fired at the bulletproof skin just below full speed and the bulletproof skin was able to successfully cushion the bullet that was fired. The bulletproof skin has boundaries at this point in time though because it was unable to cushion the bullet when it was fired at 329 m/s; the bullet travelled straight through the material.
It can be concluded that the wool fabric is the best material for a fencing jacket because it depressed the least. The tip of the weapon only depressed 2mm, while the next best material depressed 5mm. The worst material was the denim, which depressed 8mm. This happened because of how different materials are made. Wool, the material that performed the best overall, is made up of 2 strings, one is wound in parallel lines, while the other wind through the parallel strings. This creates a stronger material, since it depressed the least (My Learning, 2016). Also, the wool had a cardboard backing, which is a stiff material that prevented it from pushing in too far. The material, denim, which performed the worst, was made differently. Denim is made