A radio set of 20 kg mass must be isolated form a machine vibrating with an amplitude of 0.05 mm and 500 cpm. The set is mounted on four isolators, each having a spring scale of 31400 N/m and damping factor of 392 N-sec/m. a) What is the amplitude of vibration of radio? b) What is dynamic load an each isolator due to vibration?
Answers
Answer:
is engernering
Explanation:
intrusion detection systems (IDSs). The idea behind IDS was the same as
that behind signature-based antivirus technology, but rather than compare
the virus signatures to files that were deposited in a network, they were
compared to what viruses would look like as they traveled across the
network. This level of virus-checking was also appealing because it pro
vided more information about where on the Internet a virus had originated.
Network IDSs could also identify attacker activity prior to its resulting in
the installation of destructive software by looking for patterns of search
activity commonly used by hackers scanning a potential target. An IDS
could also spot network-borne attacks such as DDOS.
COUNTERMEASURES
Notwithstanding these security technology innovations, cyber attacks continued to be
successful. Emails that look like normal communication from
financial institutions contained links to malicious look-alike sites that either
trick users into typing their passwords into the malicious sites, or into
downloading malicious software (“malware”) from malicious sites
PHISHING
Cyber criminals attacked the methods used to direct
users to Internet addresses and change the addresses to those of look-alike
sites. These attacks were called phishing and pharming in analogies with
casting a hook into the ocean to see who would bite, or planting seeds for
later attacks, respectively.
SPYWARE
One type of malware logs user keystrokes and send user names and passwords to
criminal data collection websites (“spyware”).
The mid-2000s also saw a dramatic increase in organized crime on the
Internet, and identity theft was rampant (Acohido and Swartz 2008). There were also
many highly publicized incidents of lost laptops and backup
tapes that contained large quantities of the type of PII used to commit
identity theft. This raised awareness of the habits of remote users, who
frequently kept such data on the laptops that they took with them on travel
and also used removable media such as USB devices to carry data with
them between home and work. While some of the technologies had been
configured with the threat of device theft or loss in mind (e.g., smartphones
containing software and data programmed to destroy all data if a user
enters too many inaccurate passwords), many had never even been the
subject of security review. Vendors hastily provided methods to encrypt