Malicious softwares Essay Example | Topics and Well Written Essays - 2750 words

Malicious softwares - Essay Example These malware programs tend to infect systems and bundle other programs by attaching themselves as macros to computer files. These malware programs are also installed through the exploitation of a vulnerable spot in an operating system, a network spot, or even a hole that is existent in a browser. For these programs to cause harm to the computer, they have to multiply; which is a basic characteristic for them. Worms and viruses have the ability to alter the normal operation of an operating system; inflicting various kernel-level items (Christodorescu et al. 2007). These kernel items carry specific information with them that act as an indicator to existence of malware programs in the computer. As these malwares attach themselves to the computer, they tend to interact with various programs and increase their level of sophistication in order to combat anti-malware solutions. Some types of viruses enter into the user computer systems through the email systems as well as the address books. These viruses present themselves in a manner to suggest their validity and objectivity from coming from a trusted host source. The execution of the host code supplements the execution of the viral code. The virus program is then able to destroy the host program and attach itself into the computer. However, not all viruses have the ability to overwrite other programs especially with their replicate copies (Gragido 2013). Some only infect the boot sector and move the data in the selected boot sector.

Biology Research Paper Example | Topics and Well Written Essays - 500 words

Biology - Research Paper Example Therefore the hypothesis is that "Light deprivation during fetal development and infancy affect the brain function during adulthood". Since this experiment cannot be performed on humans, we need to test this hypothesis in rat model for light deprivation. There will be three sets of experiments, viz., 1. Light deprivation of mother during fetal development (pre-natal). 2. Light deprivation after birth (post natal) for 6 weeks. 3. Light deprivation during fetal development and after birth (both pre-natal and post-natal). Pregnant mothers will be either reared in dark. The pups born to these mothers will be either grown in dark (group 3) or normal light cycle, i.e., 12 hours light followed by 12 hours dark (group 1) for six weeks. Alternatively, pregnant mothers will be reared in normal light and the pups born to these mothers will be reared in dark for six weeks (group 2). All other variables like room temperature, humidity, access to food, quality of food and water will remain constant. After six weeks, the animals will be tested for learning behavior, by a T-maze. In a T-maze, the reward (food) can be placed at on e end and the hungry rat is allowed to choose the arm several times. The number of trails it takes the animal to choose the correct arm gives a measure of its learning capability. Atleast 6-8 animals will be tested in each group and the number of trails recorded.