Premium Essay

Nea Detection System

In:

Submitted By zhangpu
Words 726
Pages 3
Background of LISA detection rate:

LISA is a joint ESA–NASA mission aiming for cosmic gravitational wave detection and analysis. It has been shown that the passage of one asteroid in the neighborhood of one of the LISA spacecrafts can generate a signal detectable with the standard LISA data analysis, and this has led to the issue of quantifying the rate of such events.

P Tricarico et.al do a lot of research on LISA detection technique[2006,2009]. In 2009, he proposed a method to evaluate the NEA detection rate numerically and modeled the NEA population by statistic method.
The detection rate [pic] is determined by the following equation:
[pic]
Where
[pic]
[pic] is the spatial density function of an NEA k, and V is the relative velocity. The symbols in the expression of [pic] are orbital elements of the NEA.

Then the authors estimate the detection rate for the modeled NEAs population. In order to do so, we compute to total detection rate due to known NEAs within a short range in H, and then scale it to the number of modeled NEAs within the same range, including a correction coefficient related to selection effects.

They get the following distribution of NEA population detected in one year over H:
[pic]
Where C=13.26, [pic]

Evaluate yearly detection rate of NEAs
Tricarico’s finding can tell us that if we know nothing about the NEAs, how many NEAs can we detect in one year. Since we also have the relationship between the size of NEA and the absolute magnitude, we can then obtain the distribution of all NEAs by the power law.

Here is the result:

[pic]
[pic]

Based on Alan Gilmore’s findings in 2007, we can classify the NEAs into five groups:
|Diameter |Impact energy /MT |Effect |Death |
|10 km |100 million

Similar Documents

Premium Essay

Attack Prevention Paprer

...Attack Prevention Paper Introduction Cyber-attacks which are exclusively performed for the only objective of information collecting vary from monitoring the activities which a user makes to copying vital documents included in a hard drive. While those which do harm generally involve monetary thievery and interruption of services. Cyber-attacks are a slowly growing situation which is based on technology. The secret to avoiding this kind of attack is in the applications and programs which one uses for protection which identifies and informs the user that an attack is certain generally known as Cyber Warfare. As stated in the 1st explanation. However dependence and reliance aren't the only items which technology provides. Or an effort to monitor the online moves of people without their permission as the sophistication of cyber criminals continues to increase; their methods and targets have also evolved. Instead of building the large Internet worms that have become so familiar, these criminals are now spending more time concentrating on wealth gathering crimes, including fraud and data theft. An online article from Cyber Media India Online Ltd., suggests that because home users often have the poorest security measures in place, they have become the most widely targeted group. Cyber Media states that 86% of all attacks are aimed at home users (2006). As attacks on home users increase, new techniques are surfacing, including the use...

Words: 951 - Pages: 4

Premium Essay

Homework 1

...IS4560 Hacker tools, techniques and incident handeling Unit 1 Homework 1 Attacks are defined as any malicious activity carried out over a network that has been detected by an intrusion detection system, intrusion prevention system, or firewall. Based on the geographical map the whitepaper lays out for us, the United States receives chart topping threats in malicious code, phishing hosts, bots, and attack origin. Web based threats are increasing by the day with the endless amount of client-side vulnerabilities, attackers can focus on websites to mount additional, client side attacks. The most common web based attack in 2009 was related to malicious PDF activity, which actually accounted for almost 50% of web-based attacks. The year before that number was only at 11%. This attack got so popular because exchanging PDF files was a common day to day activity. So it wasn’t rare when you saw one in your inbox and didn’t think twice before opening it. 34% of all web based attacks happen in the United States, China is second with 7%. Some of those extremely high U.S. numbers are actually on the decline from the previous year’s report. Most of the decrease is because of increases in other countries and the Federal Trade Commission shut down a ISP that was known to distribute malicious code, among other content. One of the botnets linked to the ISP was Pandex (aka Cutwall). This botnet was responsible for as much as 35% of spam observed globally. The most difficult...

Words: 456 - Pages: 2

Premium Essay

Owner

...System Administrator | ← Job Descriptions Main Page  | ESSENTIAL FUNCTIONS: The System Administrator (SA) is responsible for effective provisioning, installation/configuration, operation, and maintenance of systems hardware and software and related infrastructure. This individual participates in technical research and development to enable continuing innovation within the infrastructure. This individual ensures that system hardware, operating systems, software systems, and related procedures adhere to organizational values, enabling staff, volunteers, and Partners. This individual will assist project teams with technical issues in the Initiation and Planning phases of our standard Project Management Methodology. These activities include the definition of needs, benefits, and technical strategy; research & development within the project life-cycle; technical analysis and design; and support of operations staff in executing, testing and rolling-out the solutions. Participation on projects is focused on smoothing the transition of projects from development staff to production staff by performing operations activities within the project life-cycle. This individual is accountable for the following systems: Linux and Windows systems that support GIS infrastructure; Linux, Windows and Application systems that support Asset Management; Responsibilities on these systems include SA engineering and provisioning, operations and support, maintenance and research and development...

Words: 1105 - Pages: 5

Premium Essay

Ananth

...disruptive, destructive, or unwanted programs. a) Bad program b) Hacking c) Malware d) Zombie computer 2. Social networks and cloud computing increase vulnerabilities by providing _____. a) a single point of failure b) an easy way to steal data c) an easier way for data to be read over networks d) extra security over a network 3. _______ is a deceptive attempt to steal a person’s confidential information by pretending to be a legitimate organization such as PayPal. a) Inquiry b) Lying c) Phishing d) Polling 4. Some essential defenses against malware and botnet defenses include all of the following except: a) antivirus software b) constant monitoring by a human c) intrusion detection systems d) intrusion prevention systems 5. ______ fraud refers to the deliberate misuse of the assets on one’s employer for personal gain. a) Occupational b) Human c) Malicious d) Accidental 6. One of the worst and most prevalent crimes is/are _____. a) phishing b) viruses c) identity theft d) malware 7. Physical control is an example of what category of control? a) Application b) Basic c) Major d) General 8. Network Security measures involve ___ types of defenses referred to as layers. a) 4 b) 3 c) 10 d) 5 9. _____ is a type of security protocol used for wireless transmission. a) WEP b) WEEP c) WHAT d) AP 10. The _________ is an anti-fraud law that forces more accurate business reporting...

Words: 399 - Pages: 2

Premium Essay

Network Security Plan

...will not be visible outside of the organization and another firewall without NAT which will be visible outside of the organization. Network Security Plan Purpose Computer and network security incidents have become a fact of life for most organizations that provide networked information technology resources including connectivity with the global Internet. Current methods of dealing with such incidents are at best piecemeal relying on luck, varying working practices, good will and unofficial support from a few individuals normally engaged in central network or systems support. This approach undoubtedly leads to inefficiencies and associated problems with respect to:   * ·        Duplicated effort * ·        Inappropriate actions * ·        Poor co-ordination * ·        Confusion - No obvious authority, identifiable responsibilities or overall management * ·        Tardy incident detections and resolution times * ·        Missed, unreported or ignored...

Words: 3365 - Pages: 14

Premium Essay

Cyber Terror

...access to a control system device and/or network using a data communications pathway. (US-CERT, 2005) Over the past few years, we as a nation have seen a major increase in National Security threats in Cyberspeace. President Obama identified Cybersecurity as one of the most serious economic and national security challenges that we are currently facing. Federal government leaders admit to falling behind with the growing threat of attacks from hacker criminals. The government accountability office has identified weakness in security controls in almost all agencies for years but yet to have total control over the threats. One of the underlying causes of the weakness is that agencies fail to implement information security programs which include assessing and managing risks, developing and implementing security policies and procedures, and promoting security awareness. (Nextgov, 2009) In January 2008, President Bush introduced the Comprehensive National Cybersecurity initiative ( CNCI). The CNCI included a number of reinforcing methods that included 1.) Managing the Federal Enterprise Network as a single network enterprise with Trusted Internet Connections. This is headed by the Office of Management and Budget and the Department of Homeland Security, it covers the consolidation of the Federal Government’s external access points (including those to the Internet) 2.) Deploy an intrusion detection system of sensors across the Federal enterprise. Intrusion Detection Systems using passive sensors...

Words: 538 - Pages: 3

Premium Essay

Information Systems Security

...Information Systems Security Strayer University CIS 333 June 18, 2014 David Bevin Information Systems Security The scope of our assignment as an information officer at Whale Pharmaceuticals is to safeguardour daily operations which require a combination of both physical and logical access controls to protect medication and funds maintained on the premises and personally identifiable information and protected health information of our customers. The immediate supervisor has tasked us with identifying inherent risks associated with this pharmacy and establishing physical and logical access control methods that will mitigate all risks identified. There are few basic things to be cognizant of as we carry out this task. Security is easiest to define by breaking it into pieces. An information system consists of the hardware, operating system, and application software that work together to collect, process, and store data for individuals and organizations. Information systems security is the collection of activities that protect the information system and the data stored in (Kim & Solomon 2012). We should also be aware of what we are up against. Cyberspace brings new threats to people and organizations. People need to protect their privacy. Businesses and organizations are responsible for protecting both their intellectual property and any personal or private data they handle. Various laws require organizations to use security controls to protect private and confidential...

Words: 3283 - Pages: 14

Premium Essay

Solutions of This Questions

...of disruptive, destructive, or unwanted programs. a) Bad program b) Hacking c) Malware d) Zombie computer 2. Social networks and cloud computing increase vulnerabilities by providing _____. a) a single point of failure b) an easy way to steal data c) an easier way for data to be read over networks d) extra security over a network 3. _______ is a deceptive attempt to steal a person’s confidential information by pretending to be a legitimate organization such as PayPal. a) Inquiry b) Lying c) Phishing d) Polling 4. Some essential defenses against malware and botnet defenses include all of the following except: a) antivirus software b) constant monitoring by a human c) intrusion detection systems d) intrusion prevention systems 5. ______ fraud refers to the deliberate misuse of the assets on one’s employer for personal gain. a) Occupational b) Human c) Malicious d) Accidental 6. One of the worst and most prevalent crimes is/are _____. a) phishing b) viruses c) identity theft d) malware 7. Physical control is an example of what category of control? a) Application b) Basic c) Major d) General 8. Network Security measures involve ___ types of defenses referred to as layers. a) 4 b) 3 c) 10 d) 5 9. _____ is a type of security protocol used for wireless transmission. a) WEP b) WEEP c) WHAT d) AP 10. The _________ is an anti-fraud law that forces more accurate business reporting...

Words: 399 - Pages: 2

Premium Essay

Itt Security Final

...if we follow these steps Richman Investing will be more secure and will remain number one in the United States when it comes to investing. Every business has an Acceptable Use Policy(AUP), whether or not they inform the users of it is a different story. When people give out an AUP, they need to enforce it. The worst user is an uniformed user. An AUP states what a user can and cannot do on the network. This is what should not be allowed: * No downloading executable from software sites; as this may be infected with any type of virus that could further do damage to our network. * No access to Facebook or any other type of social networking. This is because this will slow down production. * No remote connections from systems that fail to meet the set requirement. This is because any computers that do not have updates installed may be another security threat. * No accessing unauthorized internal resources or information from external sources This is to make sure we follow the internal use policy. A password by definition is, a secret word or phrase known only to a restricted group. Make sure users are not physically displaying passwords on the monitor or anywhere an unauthorized user can find it. If an unauthorized user...

Words: 1091 - Pages: 5

Premium Essay

Lkt2 Task 5

...capabilities of this network give Myrtle & Associates an advantage and helps make them competitive. The Bellview Law Group operates on an antiquated system that is stationary and not as secure as their counterpart. They do not have access to case files on the move. With the merger forming MAB Law Firm there must be some necessary and much needed changes to both systems to a single definitive network. Myrtle & Associates domain will become part of the MAB Law Firm domain. Myrtle & Associates will still have the same experience they previously encountered but will be able to interact more effectively with the employee of Bellview Law Group location. Belleview Law Group will see a complete over hall of their network and systems. Their outdated in-house built server towers will be replaced with new Dell power edge servers. They will operate the same case management software that the Myrtle & Associates operate. These systems will replicate with one another. The network will become a Server 2008 R2 based network utilizing windows active directory one the MAB Law Firm domain. Each site will host a domain controller and domain name system on the same server. The networks will be connecting via a secure wide area network. The office will be able operate as one unified organization from a network and systems stand point. This will help the blending of the two firms into one. A user form on office will be able to go to the sister office and seamlessly log...

Words: 2002 - Pages: 9

Free Essay

Disaster Recovery Management Com-540-Mbol1

...COM 540 Week #8 Course Project Saint Leo University Disaster Recovery Management COM-540-MBOL1 Contents Background 3 NIST SP 800-94 3 Intrusion Detection and Prevention Principles 4 Key Functions of IDPS Technologies 4 Detection Options 4 Types of IDPS Technologies 5 IDPS Technologies 5 Proper Installation 6 Testing and Deployment 6 Securing the IDPS 6 IDPS Updates 6 Building and Maintaining Skills – Additional Resources Required to Support 6 Using and Integrating Multiple IDPS Technologies 7 Review of the IDPS Marketplace 8 Comparison of IPS Products 9 Summary 9 Background The National Institute of Standards and Technology commonly known and referred to as NIST, is a government funded agency. NIST defines their mission statement as “NIST's mission is to promote U.S. innovation and industrial competitiveness by advancing measurement science, standards, and technology in ways that enhance economic security and improve our quality of life.” (NIST General Information, 2014). NIST is involved in mostly every area of Information Technology from the latest Trusted Identity (Leithauser & Curran, 2012) standards formatting to the handling and processing of DNA (DNA research, 2013). In recent years the President of the United States signed a Memorandum implementing a Digital Government Strategy. The government recognizing mobile device vulnerabilities and the high risk of data loss assigned NIST to implement IDS and other security standards...

Words: 2456 - Pages: 10

Free Essay

Aitek

... Quality  Headquarter and Branches  Partners © 2010 Aitek S.p.A. - www.aitek.it 2 Profile © 2010 Aitek S.p.A. - www.aitek.it 3 Profile  Aitek S.p.a. is a private company founded in 1986 by a team of industrial and academic researchers. The company has gained significant experiences in the IT fields of traffic technology, telecommunications and video digital systems, gaining a deep knowledge of both the Italian and the international market. Headquarters in Genoa. Branch offices in Savona (IT) and Lisbon (PT). Aitek’s staff consists of 45 persons, 85% university graduated. In 2009 Aitek has reached a turnover of 3.7 Million Euro.     © 2010 Aitek S.p.A. - www.aitek.it 4 Market © 2010 Aitek S.p.A. - www.aitek.it 5 Market The company has gained significant experience in the IT fields of traffic technology, telecommunications and video digital systems, gaining a deep knowledge of both the Italian and the international market.  Intelligent Transport Systems – Automatic Toll Collection, Real Time information systems, Infomobility, Traffic Monitoring.  Security - Video Surveillance, Video content analysis;  Multimedia - IP TV, Digital Signage, Business Television, Video on Demand, Streaming solutions. © 2010 Aitek S.p.A. - www.aitek.it 6 Products and Services © 2010 Aitek S.p.A. - www.aitek.it 7 Traffic Technology Since 1990 Aitek developed a deep knowledge of ICT solutions...

Words: 2050 - Pages: 9

Premium Essay

Paper 1

...layer of the multi-layered security plan is the user domain. The user domain consists of the people who access the companies information systems. The first thing that should be set up in the User Domain is some type of acceptable use policy. The next domain is the workstation domain. The workstation domain is where the employees of the company connect to the network infrastructure. In this domain there needs to be multiple layers of defense. Your main defense here will be passwords but it should also have other login techniques such as biometrics or authenticators. The LAN domain will be your companies physical infrastructure. In this domain the system administrator should keep track of all user accounts and their corresponding rights. In the LAN-to-WAN domain you have many security options are available such as Intrusion detection systems, intrusion prevention systems, and email content-filtering. The WAN domain includes both physical networking components and logical parts of communication systems. The main goal for this domain is to allow users the most access possible while making sure what goes in and out is safe and secure. The remote access domain is what allows users within the company to remotely connect to the network. A few ways to secure this domain is VPN routers and firewalls, and to use Secure Socket Layer. The last layer is the system/application domain. This domain is one of the most critical parts of the security plan and encompasses all major parts of the company’s...

Words: 293 - Pages: 2

Premium Essay

Notes

...Risk is the likelihood that a loss will occur. Losses occur when a threat exposes a vulnerability Threat—A threat is any activity that represents a possible danger. • Vulnerability—A vulnerability is a weakness. • Loss—A loss results in a compromise to business functions or assets. Assets can have both tangible and intangible values. The tangible value is the actual cost of the asset. The intangible value is value that cannot be measured by cost, Tangible includes • Computer systems—Servers, desktop PCs, and mobile computers are all tangible assets. • Network components—Routers, switches, firewalls, and any other components necessary to keep the network running are assets. • Software applications—Any application that can be installed on a computer system is considered a tangible asset. • Data—This includes the large­scale databases that are integral to many businesses. It also includes the data used and manipulated by each employee or custome The intangible value includes: • Future lost revenue—Any additional purchases the customers make with the other company is a loss to your company. • Cost of gaining the customer—A lot of money is invested to attract customers. It is much easier to sell to a repeat customer than it is to acquire a new customer. If you lose a customer, you lose the investment. Customer influence—Customers have friends, families, and business partners. They commonly share their experience with others, especially if the experience is...

Words: 3234 - Pages: 13

Premium Essay

Pos Scraping

...Neiman Marcus Hacking and Securing a POS System John Fischer Security Research Paper 9/22/2014 For several years we have been using the point of sale (POS) system for payment at major retailers. In the last year there have been several attacks on major retailers POS systems. In this paper, I will focus specifically on the breach of security at Neiman Marcus. In this discussion I will explain how to help secure a POS system. Neiman Marcus was founded in 1907 by Herbert Marcus with his sister, Carrie Marcus Neiman, and her husband A.L. Neiman. Their initial investment was $25,000. The original Neiman Marcus was on the corners of Elm and Murphy streets in Dallas, Texas. In 1913 a fire destroyed the companies building and its entire inventory. A new building was built in 1914 on the corners of Main and Ervay, also in Dallas, Texas. Neiman Marcus’ headquarters is still located in this building. Neiman Marcus is a high end retail store. The target market for Neiman Marcus is the top 2% of the income bracket of the United States, plus the wealthiest people around the world. Neiman Marcus retails high end goods such as clothes, jewelry, cosmetics, home furnishings, antiques and even rare books. Neiman Marcus also has an online store, started in 1999, that offers customers access to high end luxury goods. In 1926 Neiman Marcus first issued their holiday catalog. Many different items have been offered in their holiday catalog, including life size robots and jetliners...

Words: 1694 - Pages: 7