Sea Wolf Essays - Gray Wolf, Scavengers, Comanche People

Sea Wolf Wolf Larsen was a character in the book who never made it all the way through the book, but he tried very hard. He was a very strong, brutal man with almost no respect for human life. With all the people in the world, one dead person meant nothing to him. He was a patient man and usually kept himself under control. He was surprisingly smart and thoughtful for a pirate who lives on the sea. He loved the sea and knew many things about it, such as how to outwit his brother when he came near Wolf's boat. Humphrey Van Weydon, or Hump as he was called on the boat, was a landlubber. He had a very comfortable job, and very soft skin showing how soft his life had been. He had barely any muscles and lived a very pampered living. He was a gentleman and very proper. Being proper, he was very intelligent and had a very extensive vocabulary. He seemed very surprised when he realized Wolf and he both shared some vocabulary words and meanings. Hump wasn't used to living on a boat, but he soon learned to live on one. He became accepted on the boat with the crew. Wolf and Hump were very different people with few similarities. Wolf was very strong and bullied everyone around. He believed everyone was insignificant, while Hump was nice, proper and believed everyone was unique and we all should live and that one person can make a big difference and change in the world. Wolf also tried to turn Hump into a strong man, since Hump was a wimp in everyone's eye on the boat. Wolf had one disadvantage though, during his voyages, he read many books, but was never able to say what he read or really talk about anything he read. When Hump came along, they shared and exchanged knowledge and each learned new things about the books they read. One scene that stands out the most from the book was when Wolf Larsen was engaged in a battle with his brother. Wolf played Hide-N- Seek with his brother behind fog on the seas for a long time. During this fight, Hump and Maud Brewster, a girl whom Hump was in love with and was trapped on the boat too, got on a small boat and sailed to safety away from Wolf's boat to freedom. Only later after Hump saw Wolf's boat stranded on the island where Hump and Maud were living did he hear from Wolf that his brother came on board during the night and offered everyone a chance to get away and paid them to go on his boat. Wolf's boat didn't have any crew left after everyone left. Sea Wolf and Dove surprisingly had many similarities between them. Sea Wolf was a story was told on the sea and in first person just as Dove had been done. In the sea, Hump worked under Wolf Larsen as a crewman while Robin worked under the stress of finishing the journey around the world. In both books the main character found true love. Hump found and fell in love with Maud while Robin fell in love with Patti. Finally, both stories ended with the problems solved, Wolf Larsen died leaving Hump free from stress of him killing him, and robin finished the journey to have a family and spend the rest of his time with his wife Patti.

WHEN DIPLOMACY IS NOT ENOUGH essays

WHEN DIPLOMACY IS NOT ENOUGH essays Mediation is a dispute resolution process in which a neutral third party assists the participants to reach a voluntary and informed settlement. Mediation and diplomacy have both been used more and more frequently after the Second World War in order to prevent such a tragedy from reoccurring. Diplomacy can be used in several ways, but not all are considered orthodox although they can contribute to peaceful resolutions of problems. Certain countries like the United States are extremely advanced in almost all areas of technology, industry, militia and economy, therefore controlling the upper hand in most situations. The U.S. has a tendency to help other nations only if it will benefit from the outcome. The United States often contributes to the resolving of a conflict by sending spokespersons to represent the interests of their country, which usually signifies large profits and also by sending troops to ensure that no aggression is taken during the peace talks. Other countries suc h as Canada have specialized peacekeeping troops to aid the citizens of a discontent region repair damage that might have been caused or more often prevent any aggression that might occur before a settlement is reached. In history, it has been observed that Canada does not have as much of a hunger for profit in aiding other countries as the United States, which is apparent in Canadas reputation. This Alternative Dispute Resolution has provided an option for many countries to deal with international conflicts and disputes rather than immediately resorting to violence. Nevertheless, there are always exceptions to the rule and not all problems can be resolved peacefully and without bloodshed. These exceptions must be recognized early enough so that the proper measures can be taken to immediately settle the conflict. However, not all attempts at resolving problems using diplomacy are successful and military intervention is required. These situati ...

Autobiography Essay Example | Topics and Well Written Essays - 750 words

Autobiography - Essay Example After witnessing my grandmother’s near-death experience and her recovery to normal life, I knew that the human body fascinated me. I wanted to be the oncologist who helped get my grandmother’s health back on track. I wanted to help bring back smiles to people’s faces through influencing their health conditions. My clinical shadowing and research experience has helped affirm my dream of becoming a doctor. This experience has assisted me in learning how tender and caring one should be towards patients. I have learned that devotion is key to becoming successful in the medical profession. I have learned to experience the joy one gets at seeing patients recover. The experience further widened my eyes on how detailed the human body is, and how perfectly careful one has to be when dealing with it. I got to be part of two research activities through this experience; a clinical and laboratory research. Forming part of the clinical research helped me to gain two mentors wh o were the two head doctors of the research. They guided me on the road they undertook towards achieving their work as doctors. The clinical research further enlightened me on the effort, dedication, and the love that a team of doctors put towards assisting a community. The clinical research also helped me to consolidate my academic goals. I became interested in attaining a master in public health during the gap year after medical school. The laboratory research experience helped me to understand how to follow specific protocols.

Community changes Scholarship Essay Example | Topics and Well Written Essays - 500 words

Community changes - Scholarship Essay Example was doing a random selection on people who will be given authorization to make changes in our community, I immediately saw this as an opportunity to make a difference. If I were to propose three things that I would promote to achieve a positive change in my community, it would be: First, to provide for the needs of the community, such as feeding the hungry, giving poor families a comfortable place to live in, impart to them the knowledge and skills for livelihood, educate the uneducated, and to give the elderly proper care and attention. I propose these projects that would satisfy every level of Maslow’s hierarchy of needs: physiological, safety, social, esteem, & self-actualization, because I believe that when all is gratified, it is when a person would be most productive and motivated, the key to a prosperous society (Maslows Hierarchy of Needs, n.d.). Second, I would want to set a monthly awareness talks and seminars for the community to participate in. Topics of the talks or seminars would involve how to be a socially responsible neighbor & how to be environmental-friendly in one’s community, and at the same time involve activities that will allow households in a certain neighborhood to get to know each other and learn from each other. This is because I believe that a neighborhood’s health affects individual lives (Neighbourhood Effects | Seminars, n.d.). With this said, to be able to enrich the quality of life in a certain community, it is best to instill positive values within them so as to promote cooperation, integrity, friendliness and good will. We all know that a lot of conflicts we now face in society are caused by indifference, selfishness and abuse towards other people. Thus, if I would be able to develop positive values in a small group of society such as the neighborhood, it would definitely help achiev e a peaceful society in the future. Third, I would want to promote a healthy and active lifestyle which would not only benefit the specific

Living in Multicultural Societies Research Paper

Living in Multicultural Societies - Research Paper Example Since the developed nations of the world offer superior education, health, employment and individual as well as collective growth and development of the people, the populations belonging to the under-developed and developing countries tend to move to the developed states for brighter job and business prospects on the one side, and to lead a better, comfortable and luxurious life on the other. Situated in the Island of Hispaniola, in the southern part of Atlantic Ocean, the Dominican Republic serves as the second largest Caribbean nation existing on the face of the earth (Seelke 1). Being the poor economy, but rich with the natural resources, the country had been the target of the adventures of the European powers since the seventeenth century onward. Since the Spanish royalty had taken keen interest in keeping the country under the Spanish control, the Caribbean island had been one of the Spanish dominions for decades. By the end of eighteenth century, the country came under the sway of French authorities, though the French had to experience the revolt of the indigenous population against them. It eventually encouraged the neighboring Haitians to occupy the island for establishing their rule over it (Lancer 2002). Migration is a social phenomenon, which is equally popular among the individuals belonging to all geographical zones, different ethnic, racial and religious backgrounds, various age-groups and both the genders (Weeks 263). Identical with the rest of the world, the people belonging to the Dominican Republic also observe migration from their native country to some other regions of the globe. It is partly because of the very fact that the country had been the victim of poverty, massive corruption at national scale, bad governance, nepotism, political unrest, sociocultural chaos and economic uncertainty that force the masses to explore new dimensions for making progress in life (Morgan, Espinal, & Seligson 10-1). In addition, the country also

Importance of Using the ACARS System

Importance of Using the ACARS System Abbreviations ACARS: Aircraft Communication Addressing and Reporting System ADS-B: Automatic dependent surveillance broadcast CMU: Communication Management Unit CDU: Control Display Unit FMS: Flight Management System ATC: Air Traffic Control AOC: Aeronautical Operational Control AAC: Airline Administrative Control NOTAM: Notice to Airmen VHF: Very High Frequency VDL: VHF Data Link MAC: Message Authentication Code AES: Advance Encryption Standard SHA: Secure Hash Algorithm CA: Certificate Authority ICAO: International Civil Aviation Organisation IPsec: Internet Protocol Security In this report the importance of using the ACARS system in the communication between the aircrafts and the ground units such as Air traffic control (ATC), aeronautical operational control (AOC) and airline administrative Control (AAC). (2) Also, the need of securing the communication channel against passive and active attackers will be identified and analysed. The ACARS system is used to transmit data both from aircraft to ground and from ground to aircraft. The data transmitted from the aircraft to the ATC will communicate requests and receipts for clearances and instructions when the aircraft is on the ground, during the phases of take-off and landing and finally during the time the aircraft is in the air. The ACARS is system is also used for communication between the aircrafts and the AOC and AAC ground units. The data transmitted between these three entities is about various aspects of the aircraft, weather information and observations, NOTAMS, flight plan and any diversion from the flight plan, technical performance, possible system failures and any special information regarding the flight and its passengers. ACARS system to transmit data to the ground receivers, the FMC hardware is used on newer aircrafts or the CDU on older ones. The communication is accomplished by using the FMS unit and a small printer in the aircrafts and similar hardware on the ground. The FMS transmits the data to either a satellite or a ground antennas, regarding the altitude of the aircraft. After either the satellite or the antenna will transmit the data through the communication network to the appropriate ground unit using a private network. Due to the reason that these data are crucial and must not be altered or even sometimes monitored by unauthorised users the security of the communication channel and the data should be the top priority of the airlines. To achieve that the data transmitted should always maintain the three major aspects of information security which are: Confidentiality Integrity Availability During the early years of the aviation industry communication channels were only needed between the ATC and the pilots. There were no ways to transmit data regarding the aircrafts avionic systems, engines and integrity, mainly due to the reason that there was not such advanced technology, on both the communication channels and on the aircrafts. The only communication channel available was the VHF channels that in our days is the least trusted protocol. As the aircrafts developed, the boundaries were extended, and led to a rapid increase in air traffic. In order to co-op with this, the aircrafts manufacturers decided to improve the quality and quantity of the systems aboard the aircrafts in order to protect them from mid-air collisions and also help the ATCs to manage the traffic easier. From the moment that the aviation instruments on board the aircraft changed from analogue to digital, a breakthrough was achieved, leading many companies to develop software and hardware that allowed the improvement of the communication and data transmission between the aircrafts and the ground. Along with these improvements, the aircrafts critical systems were able to continuously provide the data recorder information regarding their condition. During this phase the CPDLC was developed in order to minimize the acoustic misunderstandings (6) provided accountability and made the communication easier, more efficient and safer to transmit and receive l ong messages (6). Although in my opinion this system would make the communication between the pilots and the ATC easier and safer, it wasnt widely used because of security threats like message manipulation or injection (6) that were not possible to be detected. Also, a major backdoor to the system in my opinion was that there was no authentication leading to eavesdropping or spoof clearances (6). For the improvement of safety and to be able to improve the accident investigations, the authorities decided that it would be helpful, that these data should be transmitted to the ground and in order to improve the communications between the aircrafts and the ATCs, a new system was developed, which is called ACARS. Along with it new techniques of communication and data transmission were introduced that allowed the aircraft, ATCs and airlines headquarters to communicate with each other by sending short texts. ACARS was introduced during the 80s and as the years passed it became very popular among the airlines. It allowed direct communication between aircrafts and ATCs for requesting and receiving instructions and clearances. The ability of communicating between the aircraft and the AOC and AAC was introduced, that allowed the exchange of information about the weather, possible issues with the aircrafts systems, NOTAMs, passenger information, etc. In the early years of aviation, the computers were not very capable in intercepting or manipulating a message that was transmitted and therefore there was little need for that system to be secure. As the years pass and computers became stronger, together with the knowledge of people, possible unauthorised monitoring of message transmission or even manipulating the messages transmitted between the aircrafts and the ground was a threat to aviation. In order to solve this issues, security mechanisms were placed in order to protect the communication channels and the data transmitted. The security mechanisms placed, are updated regularly in order to maintain the information secure against new threats and attackers. The difficulty of maintaining a secure communication channel is becoming greater, due to the reason that the cost of hardware that allow you to monitor the information transmitted by aircrafts are very cheap and easily accessible. This together with the increasing knowledge of people on how to use them the wrong way and with the intention to cause harm for various reasons, makes the work of the ones trying to protect these systems, very difficult and crucial for the safety of the passengers and aircraft crew lives. As the workload for the pilots in command increased greatly due to the increased traffic, reduction of the crew members in aircrafts and the need to maximize profit without undermining safety and in order to protect the pilots from making mistakes or forget to complete the necessary steps for the safe conduct of a flight, researchers were working on a new way of communication between the aircraft and the ground operations. That software was ACARS and was developed in the 1980s. ACARS is a digital datalink system (3) that allows the pilots, ATC and the airlines headquarters to exchange short messages no matter of the location of the aircraft around the world. In order to achieve that the aircraft is equipped with an avionics computer which is called Communications Management Unit (CMU), a control display unit (CDU) and a printer. The CMU was designed to be able to send and receive digital messages (3) regarding aspects of the flight, instructions and clearances from the ATC, weather forecasts, NOTAMs and information to and from the companys headquarters regarding the aircrafts performance and special needs about the passengers. In order to achieve the level of communication needed, the ACARS system is using different types of communication media. The two media used to communicate between the aircraft and the ground by using satellites when the aircrafts are at higher altitudes and radio antennas at lower altitudes. Before the first implementations of the ACARS system, the communication between the aircrafts and the ground was performed by VHF voice channels. As the technology advanced, new way of communication were developed. During the first periods of implementation of the ACARS system the ARINC organisation, developed a service that a allowed for the VHF communication service to be upgraded by a new service that allowed the use of digital telex formats (3) to the VHF communication channel. During the 90s this led to the standardization of a VHF Digital Link. As the implementation of the ACARS software by airliners became widespread, new services were developed in order to make the communication channels more efficient. SITA company, during this phase had developed a large ground communication network that was connecting places around the world. In order to further enhance the abilities of ACARS, SITA integrated their ground communication network to be able and cooperate with ACARS already existing communication channels between aircraft and ground. In my opinion the ACARS system was designed very cleverly because it was able to cooperate with many types of aircraft communications equipment such as VHF, Inmarsat, sitcom, iridium satellite, VDL and high frequency data link (6). More detailed, SITA managed to merge both VHF and VDL air to ground communication channel together with the ground network it had already developed and to provide an end to end communication channel between aircrafts and ground operations no matter the type of flights. Both short haul and long haul routes were supported. Figure .1 ACARS Setup (9) ACARS security is very important for the safe conduct of flights. Two different types of security were implemented. The first one was called DSP-based architecture and is only capable to protect ACARS messages during transmission from the aircraft to the ground, leaving the ground network unprotected and risking attacks from hackers open. For that reason, there is an end to end security architecture was proposed and developed. In order for the security of the ACARS system to be complete it will have to maintain confidentiality, integrity and availability to the information transmitted at all times, both in the communication channel between the aircraft and the ground and also in the ground network. On the end to end solution proposed in the article The Approach of ACARS Data Encryption and Authentication (5), The proposed security will be using symmetric and asymmetric cryptography, a hybrid system that could solve the problems of using just one of the methods of cryptography, along with digital signatures to provide adequate privacy and integrity (5) to the messages. The issues that came up with the symmetric cryptography were that in order to communicate with each other, a key had to be exchanged between the sender and the recipients of the message. This unique key was designed to be known just by the sender and the recipient of the message in order to protect it from unauthorized users. This proved to be very difficult to maintain secure due to the large number of users that are using ACARS to communicate. On the other hand, asymmetric cryptography was able to solve this problem but it required the use of a large size keys that led to a rather large amount of bandwidth requi red just for the exchange of the keys that kept secure the communication, which was a problem due to the limited amount of bandwidth the ACARS system was designed to require. This hybrid system that was proposed, made use of a key derivation algorithm called Elliptic Curve Diffie-Hellman which is using an elliptic curve and certain points in order to find the private key. By using the elliptic curve along with the private key, it was able to generate the public key of both the aircraft and the ground station (sender and recipient). By using this technique, the communication channel was secure because it was very difficult for the attacker to find the private key even though the exchange of public key is intercepted (5). For the receiver to be able to decrypt and use the private key a key derivation function is needed which in this case is the MAC. In order to provide encryption to the data transmitted the AES algorithm is used in combination with the SHA 256 algorithm. The number 256 after the SHA acronym means the length of the random binary sequence that is used as the key for the AES (5) algorithm. Due to the reason of the limited bandwidth that ACARS is designed to be using, the message data transmitted and the necessary data transmitted to provide security should be compressed as much as possible. In order to do so every letter, number or symbol will have to be encoded to a 6bit stream during the encryption phase. In order for the recipient to be able to decode it and read the correct message, the MAC of the encrypted data will have to be read and be decrypted to an ACARS readable character. Also, the correct MAC value will have to be calculated in order for the message to be authenticated. During the testing phase of the above end to end security mechanism, eavesdropping was possible to be done but no actual data were able to be read, due to the AES that was used in the encryption of the message, so confidentiality was achieved. Privacy was also achieved because if the message was manipulated, the MAC value would have been changed and the recipient would have detected the change in value. Finally for the digital signature to be correct, the assumptions that the CA was trustworthy had to be made. Wireless Communication Security Due to the reason that the main communication channel between the aircraft and the ground stations will always be wireless, some necessary aspects of security will always have to exist in order to able to say that the channel is secure. According to the authors of the article (7), in order for a security protocol be acceptable, it must meet some requirements. The first one is the mutual entity authentication which is able to provide security by identifying the sender and the receiver. Also, the Asymmetric algorithms are very critical according to my opinion, regarding the key distribution that will allow the sender and the receiver authenticate each other messages. Next in order to prevent unauthorised people to access the communication channel, the two parties must agree to the keys used and to be able to confirm them when needed along with being able to control them, maintain the key freshness (7) so no replay attacks could be performed and also to protect secrets of old communications in the case that an unauthorised person gains access to a session key. All the above aspects, in my opinion are critical in order to maintain privacy in the communication channel. According to the article (7) which I agree with, some compromises should be taken in order to have the security options tailored to the needs of your systems. In our case the ACARS system was designed to have a small amount of load in transmitting data and therefore and IPsec with fixed pre-shared keys (7) would be very helpful because it has limited data exchanged in order to provide security. On the other hand, protocols based on asymmetric cryptosystems (7) are able to provide better security but in a higher data load cost. Wireless Communication Threat Model In order to be able to provide better solutions in the wireless communication channel, we must be able to identify the threat that are possible to be faced during the transfer of data. In order to do so we must have a threat model that is tailored to our needs. In order to create a threat model, we must also know the adversaries capabilities. In the case of wireless networks according to the article (8) authors, which are the one that ACARS uses, the adversary usually has the ability to receive and transmit data (8), should be able to monitor the network and in order to do the previous two, he must have knowledge on how the network was setup. Commonly, if the attacker is able to eavesdrop a wireless, he will be able to inject traffic (8) into the network. All of the above capabilities in my opinion are depended to the knowledge he has and to the money he is willing to spend in order to be able to perform such tasks. The main attacks he can perform to a wireless network has to do with spoofing attacks (8), replay attacks (8) which I believe is easily solved by the freshness aspect of security, eavesdropping (8) compromise or introduction of nodes, wireless jamming (8) and finally a denial of service (8) attack by increasing extremely the load of the network. ACARS Security per Honeywell Per Honeywell, ACARS is using a message security system that is able to provide message authentication, confidentiality and data integrity, which are the basic aspects that need to be protected. Based on an ICAO document regarding the security plan a public key infrastructure and other cryptographic algorithms are used in order to protect the data transmitted. More specifically, according to the ARINC specification 823 (4) the security of the messages is split in two different parts. The first part was published on 2007 and contains everything regarding the framework of the security, such as algorithms, protocols and message formats. The second parts are about the key management of this security mechanism and was published 1 year later and contains information regarding the key life cycle and the how a certificate is managed. Furthermore, two different security provisions were developed and each of them had different characteristics regarding the mechanisms used in order to protect the data transmitted. The first one is called ATN/OSI Security and it was described in the ICAO document 9880. This kind of security foresight used digital signatures which uses the Elliptic Curve Diffie-Hellman cryptographic algorithm combined with a SHA256 in order to generate and verify the signatures. As for Message authentication, it uses hashed MAC with a 32bit MAC length. A key agreement is used in order to share the public key that will then be used in order for the recipient to be able to derive the secret key and be able to decode the message sent. The second one is called ACARS Security ARINC 823. This one also uses the digital signatures in order to sign the message and the specifications of the digitals signatures are similar to the first security foresight, making use of the elliptic curve Diffie-Hellman algorithm combined with a SHA256 for the signature generation and verification. Again, for the message authentication a hashed MAC is being used but in this case the length of the MAC is not standard. It could be 32 bit, 64 bit or even 128 bit, with the default one to be the 32 bit. The main difference between the two security foresights is that the previous didnt require a confidentiality mechanism to be in place. On the other hand, this one uses for encryption and AES128 cipher algorithm that is mainly used to encrypt and decrypt the messages. Finally, the key establishment mechanism is similar on both security foresights, meaning that both of them use an elliptic curve Diffie-Hellman with SHA256 algorithm to provide the communication channel with a secret key agreement, shared public key and the derivation of the secret key. Threats As the technology is improved, the computers become more powerful, leading in the implementation of better security mechanisms but also in increasing amount of computing power that possible attackers have in their hands. This along with the ability given to the public to be able to track the flights using the ADS-B can have possible backdoors that can threaten the safety of the flights. The main use of this surveillance technology is for the improvement of the safety and efficiency of the flights. This technology also lead to the creation of a web application and smartphone application, that gave the ability to anyone to be able to track any aircraft in the world that had this technology active. Anyone with a cheap hardware setup could receive the information sent to the ground by the aircrafts. If an attacker is able to intercept these signals, he is able to perform passive attacks like eavesdropping the communications or furthermore, block the response from the ATC (jamming) and finally send his response back (message injection), could result in the attacker to be able to perform an active attack and penetrate the aircrafts navigation system. Another possible attack according the article (6) this attacks could result in the virtually modifying the trajectory of an aircraft (6). After the attacker, has gained access to the aircraft systems, he can receive information via the ACARS system. If the ACARS system is not protected correctly, the attacker will be able to exploit the systems and either insert false information to the avionics or just attach a virus or malware and have a constant access to the aircrafts avionics and information. Furthermore, the attacker could gain access to the FMS he will be able to mess with the navigation and flight planning such as waypoints, altitudes, speeds, alternate the destination airport of the flight etc. This will result to the attacker being in complete control of the aircraft, with the pilots not being able to do much in order to gain back the control of the aircraft. Although the ACARS system was updated regularly and the ACARS AMS was developed in order to provide end to end security, many airlines decided to not use it and instead provide some security by obscurity (6), which according to my opinion could lead in more risks and better security because no one has tested the security algorithms that are used and therefore if there is any vulnerability in the security algorithm, the company will never be aware of it, leaving the communication channel open to zero day attacks. The cost of the hardware needed to complete such an attack is not high. Using online shopping web applications or other sellers, the possible attacker will be able to buy the necessary hardware such as FMS hardware, air to ground transmitters, ACARS manager hardware and other hardware, in order to perform such an attack. By using one of the most known flight simulator software, combined with the necessary hardware and finally by exploiting any vulnerabilities in the security of ACARS and FMS systems, they can manage to gain control of the aircraft with low cost. There are many ways the attacker could gain access or perform attacks against the aircrafts. These ways may include attacks via the internet by exploiting bugs in web applications, vulnerabilities against software, SQL injections to databases or other vulnerabilities that are not fixed in mobile applications. There are two different threat models according to the authors of the article On perception and reality in the wireless air traffic communication security (6). The two different threat models are the traditional aviation threat model (6) and the Modern threat model (6). The main difference between these two according the article are that the software-defined radios are widely available to the public and along with them to possible attackers and the change between analogue instruments and digital instruments, with the second ones to give the ability to the users to transmit more data in electronic form. These could lead to an increase in the abilities hackers to eavesdrop, modify and inject data on the communications channel. The traditional threat model is used from when the first forms of communication were implemented in aviation. As years passed the communication channels were improved and the amount of data that was transmitted increased rapidly. The authors of the article characterize the article as naÃÆ'Â ¯ve (6) of the reasons of inferior technological capabilities and financial capabilities, requirement of inside knowledge and the use of analog communication. (6). I can agree with their opinion because I believe that indeed the threat model is very old and due to the new technologies, along with the low cost of a setup that could allow to interfere with the communications of an aircraft, the risk will be much higher. The second threat model is the modern threat model. It has major changes from the first one due to the increased digitalisation and automation (6) of the aircrafts communication channels. Also, the increased technological capabilities (6) such as cheap hardware could lead to possible attacks that could not be performed when the first threat model was developed. Finally, people could easily gain aviation knowledge (6) from the internet, flight simulator software, which could increase the seriousness of the attacks that could be performed. For the above reasons and from my own experience with aviation knowledge and flight simulator software, I would agree that this model is more up to date and more tailored to identify the threats that todays aircraft face. Concluding on the above-mentioned information, the aviation world and more specifically the security of the aircrafts, crews and passengers are far from safe. This is because even with the security measures that are already researched, the airlines do not always implement them. Also, the technology required and the cost of acquiring such technology makes it easier for attackers to perform either passive or active attacks against aircrafts. The above when combined with the knowledge of an attacker can lead to great threats against the aircrafts. In order to maintain the aviation world safe, the need to reassess the risk of attacks under realistic system models and the development of appropriate countermeasures (6) should be identified and embraced along with new end to end security implementations are proposed and if approved implemented by airlines. Such security mechanisms must be tested in order to be totally sure that all vulnerabilities are patched and that it will never have a backdoor that could allow an attacker to perform an attack. In my opinion in order to be able to be sure that a security mechanisms that will be placed is totally secure, we must first learn our adversaries, understand their capabilities, intentions, motive and upon all knowledge and financial state. Next, we must understand what passive and active attacks an adversary can perform. If we manage to understand the above aspects of our adversaries, then we must understand what has to be done in order to prevent them from launching an attack against the aircraft- ground communications channel and ground network. By having the necessary information about the adversaries and the protection mechanisms that we can implement, then we must evaluate those already implemented and find ways to enhance them. References Smith, M., M. Strohmeier, V. Lenders, and I. Martinovic. On the security and privacy of ACARS. (016 Integrated Communications Navigation and Surveillance (ICNS)): 1-27. Web. 15 Feb. 2017. Aircraft Communications, Addressing and Reporting System. Aircraft Communications, Addressing and Reporting System SKYbrary Aviation Safety. N.p., n.d. Web. 14 Feb. 2017. Aircraft Communications Addressing and Reporting System (ACARS). Aircraft Communications Addressing and Reporting System (ACARS). N.p., n.d. Web. 14 Feb. 2017. Olive, Michael . ACARS Message Security (AMS) as a Vehicle for Validation of ICAO Doc. 9880 Part IV-B Security Requirements. Proc. of ICAO ACP WG-M Meeting, Belgium, Brussels. N.p.: n.p., n.d. 1-12. Print. Yue, M., and X. Wu. The Approach of ACARS Data Encryption and Authentication. 2010 International Conference on Computational Intelligence and Security (2010): 556-60. Web. 10 Feb. 2017. Strohmeier, Martin, Matthias Schafer, Rui Pinheiro, Vincent Lenders, and Ivan Martinovic. On Perception and Reality in Wireless Air Traffic Communication Security. IEEE Transactions on Intelligent Transportation Systems (2016): 1-20. Web. Akram, Raja Naeem, Konstantinos Markantonakis, Keith Mayes, Pierre-Francois Bonnefoi, Damien Sauveron, and Serge Chaumette. Security and performance comparison of different secure channel protocols for Avionics Wireless Networks. 2016 IEEE/AIAA 35th Digital Avionics Systems Conference (DASC) (2016): n. pag. Web. Akram, Raja Naeem, Konstantinos Markantonakis, Royal Holloway, Sharadha Kariyawasam, Shahid Ayub, Amar Seeam, and Robert Atkinson. Challenges of security and trust in Avionics Wireless Networks. 2015 IEEE/AIAA 34th Digital Avionics Systems Conference (DASC) (2015): n. pag. Web. Network Graphic. Digital image. ATC Data Link News. N.p., n.d. Web. 17 Feb. 2017.

All The Kings Men :: Jack Burden

"But in the end the truth gave the past back to me." Jack Burden pg. 436 To understand the inferential validity of the above quotation, I think it is important to first establish a literal comprehension of the quotation. Furthermore, Jack uses the facts and truth he has gathered in his life up to 1939 to better understand and explain the occurrences and consequences that have also occurred up to 1939. The most important secrets of the past that are finally uncovered are the truth about his father's, Ellis Burden and Judge Irwin, and his relationship with Anne Stanton. From the beginning of the book the Burden family structure is shaky and confusing at best, the first mention of the mother on pg. 37 describes a love confused women next to her new young husband, her fourth. Then we finally get to meet the myth, the man Ellis Burden. Ellis' status is catalyzed on pg. 200 when Jack addresses him as father and the Scholarly Attorney responds querulously, "What - what did you say?" and on those same pages the old man stubbornly refuses to comment on the questions about Monty Irwin. Furthermore on that page Jack, to himself, calls the old man a "fool,... who wasn't man enough to run his own house". Coupled with numerous All-American quotes of the upstanding Judge as Jack's father figure, pg. 121 "the Judge was a brave man", pg. 438 "... he was a man and I loved him.", the reader becomes confused about whom the father really is. This is the hidden past, and as Jack completes the "Case of the Upright Judge" , he "broke the ice" and found out the truths and facts that would give him his past back. "The Judge won't scare easy", is a quotation rapidly forgotten as Jack uses one heck of a Louisville slugger to bust this boy. The Judge, with both his frightened ticker and shortly his reputation on their last few diminishing beats, leaves this world trying to talk fast to Jack. The very next page the mystery is solved as Jack's mother hysterically falls to the floor screaming "your father and oh! you killed him." and the next line states the numbness and closure for Jack, "That was how I found out." These truths uncovered the past and their truths and weeded out the confusion that was the past. "It was always Monty", his mother says on 429, her love for him and his political dislike of the Judge caused dispute between Jack and his mother.

Culture-Bound Syndromes

Mental health functioning is important regarding a person’s well-being, being able to interact with others in a healthy manner, and contributes many things to individual’s through communities and society. Culture-bound syndromes are conditions that are specific to particular cultures. The cultures that experience, express, and deal with culture-bound syndromes in different ways is extremely common. LaVeist and Thomas (2005) state that â€Å"culture-bound syndromes are clusters of symptoms more common in some cultures than others† (p. 01). There are symptoms that are found in all nations, cultures, and similarly recognizable worldwide but yet are different at the same time. Culture-Bound Syndromes Culture-bound syndromes, also known as culture-specific syndromes, have been defined as â€Å"clusters of symptoms more common in some cultures than in other cultural groups† (LaVeist & Thomas, 2005, p. 101). Although many mental disorders are well known in sp ecific cultures, these disorders are at least somewhat conditioned by the culture in which they are found.More importantly, the topic of culture-bound syndromes has â€Å"been a controversial topic since they have reflected the different opinions of anthropologists and psychiatrists† (WHO, 1992). Consequently, researchers have had some difficulty emphasizing culture specific dimensions of certain syndromes. Some studies have suggested that the most beneficial aspect of defining culture-bound syndromes is that they represent an acceptable way to define specific cultural responses to certain situations.According to Guarnaccia and Rogler (1999), â€Å"researchers have referred to culture bound research on culture-bound syndromes serves strategically to tighten the integration between cultural and clinical knowledge, while providing insights into issues of diagnostic universality and culturally specificity† (p. 1326). The role of biology in the development of culture-bound syndromes, therefore, has proved to be of debate. Interest in culture-bound syndromes has increased over the last few decades.Similarly the treatment in a diagnostic classification treatment of these disorders has over the last several years gained attention (Guarnaccia & Rogler, 1999). Clinicians are presented with plenty of challenges when dealing with culture-bound syndromes such as how to diagnose them. Several questions clinicians present include the stability of culture-bound syndromes, the common nature of these disorders across cultures, and the similarity of symptoms between syndromes (APA, 1994).Similarly, the question of whether culture-bound syndromes should be included in the diagnostic criteria of current psychological illnesses or as individual entities themselves is also debatable (APA, 1994). Another issue concerns the relationship between culture bound syndromes and standard diagnostic systems such as the DSM. Of specific concern is that they do not easily con form to the categories within the DSM due to significant differences across cultures.These differences are due to differing views of self and reality as well as the different ways cultures express certain disorders (APA, 1994). Guarnaccia and Rogler (1999) referring to the DSM classification system in that it addresses certain concerns about differing cultural boundaries, and in dealing with the classification methods certainly deal with the reliability and validity of the non-universality of cultural experiences in relation to mental illnesses.The fact that each culture-bound syndrome is individually associated with particular sets of illness responses, it is difficult to define precisely the definition of the culture-bound syndromes as a unit. Culture-bound syndromes as therefore comprised as several different illnesses and afflictions. LaVeist and Thomas (2005) thoroughly expresses the dynamic nature of culture-bound syndromes when they state: The symptoms of mental disorders are found in all nations and in all cultures; there are recognizable symptoms that are common worldwide.Mental health researchers have not yet been able to determine whether culture bound syndromes are indicative of one or more possibilities that include distinct disorders that exist only in specific cultures, and reflect different ways in which individuals from different cultures express mental illness, as well as reflecting different ways in which the social and cultural environment interact with genes to produce disorders, or any combination of these. (pp. 01) With the following information in mind, it should be noted that not all disorders are considered pathological; some behaviors are seen as ways of expressing and communicating distress to members of a certain culture and are seen as culturally accepted responses (APA, 1994). In fact, cultures experience, express, and cope with feelings of distress in various ways that may counter what Western societies see as common. Furthermor e, at times these cultural differences are referred to as idioms of distress.Understanding the expression of these idioms (for example somatization, which is a physical representation of distress that is typically accompanied by symptoms such as abdominal or chest pain, heart palpitations, dizziness or vertigo, and blurred vision) allows clinicians to be more aware of the diagnoses they give (LaVeist & Thomas, 2005). Culture-bound syndromes can also appear to be similar within several cultures. Furthermore, a culture specific syndrome can be categorized by various things.The APA (1994) characterizes culture specific syndromes as the following: categorization as a disease in the culture, familiarity within a widespread culture, people with lack of familiarity of specific conditions from other cultures, and the use of folk medicines that particular cultures use as a conditioned sense of usage within a specific culture. More specifically, culture-bound syndromes are not the same as geographically localized diseases with specific biological causes, such as kuru or sleeping sickness, or genetic conditions limited to certain populations, like sickle cell anemia (APA, 1994).Discussions of culture-bound syndromes have often concerned the amount of different categories of syndromes present in the world today. Many culture-bound syndromes are actually specific cultural representations of illnesses found elsewhere in the world. Some of these responses are not necessarily psychological illnesses but rather are explanatory mechanisms like witchcraft (Simons & Hughes, 1985). Beliefs in witchcraft could seem to be a little farfetched as a type of culture-bound illness; however, it is supposed that witchcraft can lead to behaviors that can be seen as disordered.This concept is of particular concern to medical and psychiatric anthropologists because culture-bound syndromes provide examples of how cultural specific symptoms can evolve into psychological illnesses. Just because these responses may not begin as disorders, however, does not devalue the fact that they are illnesses and should be taken seriously (Simons & Hughes, 1985). The American Psychiatric Association (1994), states that the Western scientific perspective characterizes culture specific syndromes as imaginary and has no way of clearly being able to show why someone cannot understand that perspective.According to the APA (1994), physicians will share many things about a disorder with the patients and help them try to understand how they see their particular disorder; they also use folk medicine treatment if the patient asks for that if it is a culture-bound syndrome. Another thing is that a physician may falsify a patients perspective to offer folk medicine treatments that are available or maybe for a new and improved treatment strategy. Lastly, the clinician should educate the patient on being able to recognize their condition as a culture-bound syndrome so that the clinician m ay treat them as they see fit.Guarnaccia and Rogler (1994) said that specific conditions are very challenging within medical care and illustrate rarely discussed aspects of fundamental aspects of physician to patient relationships, a diagnosis that is the best fit for the way of looking at the body and its diseases are easily negotiated if both parties can be found. Restrictions of the diagnostic classification systems of culture-bound syndromes have complications with certain additions within the iagnostic classification systems and have raised many questions. It is not quite clear on whether culture-bound syndromes are actually different from conventional syndromes or if they are just categorically different. Some people like to argue that some culture-bound syndromes are not just limited to specific cultures but are widely experienced throughout the world. Many of the syndromes that have been labeled as culture- bound are compromised by many mixtures of indicators that have been witnessed collectively.Culture-bound syndromes are lacking in diagnostic regularity and legitimacy making it extremely difficult to reach widespread straightforward criteria to describe these illnesses because of problems in language. â€Å"In the development of the DSM, its designers tried to create a diagnostic system that was well-suited with a broader and more worldwide medical organization system that is, the International Classification of Diseases, Injuries, and Causes of Death (ICD) developed by the World Health Organization† (WHO, 1992).Therefore, the DSM implements a medical model of diagnosis for which many mental disorders, regardless of whether their background is biological or psychological, is viewed as mental illnesses and requires treatment. Furthermore, this model is implicit and assuming that mental disorders are under the compromise of behavioral or psychological symptoms that can form definable patterns or distinct forms of a particular syndrome (Guarnacc ia & Rogler, 1994).The authors of the DSM definitely made a careful choice to accept a clear-cut categorization of mental illnesses. It is important to notice, however, that the DSM does not make the assumption that all mental disorders are discreet entities with absolutely no boundaries. Finally, before methodology is discussed, examples of what culture-bound syndromes actually are is important to include. The case of Koro â€Å"provides an example of shifting diagnostic classifications because of changing decisions about which symptoms are predominant.For example, Koro was first categorized as a somatoform disorder on the basis of the perception of the afflicted person’s intense preoccupation with a somatic concern, the retraction of the penis† (Bernstein & Gaw, 1990). â€Å"More recently, Koro was categorized as an anxiety disorder and noted that others have associated Koro with panic disorders† (Levine & Gaw, 1995, p. 1323). Second, the debate of the relationship between culture-bound syndromes and psychiatric disorders according to symptoms is evident in the case of Latah Levine & Gaw, 1995). More specifically, â€Å"a debate about Latah focuses on which theoretical perspective should prevail; Simons and Hughes argued that the predominant feature of Latah is the neurophysiological startle reflex, culturally elaborated into Latah in Malaysia† (Simons & Hughes, 1985, p. 1323). Therefore, each disorder represents responses specific to certain cultures while also explaining the different ways cultures respond to events. MethodUnderstanding culture-bound syndromes requires looking at multiple sources that give a broad range of information regarding the topic. For this paper I felt that it was necessary to use the American Psychiatric Association’s Diagnostic and Statistical Manual of Mental Disorders because it gives plenty of information regarding culture-bound syndromes. The Diagnostic and Statistical Ma nual of Mental Disorders is extremely useful in the fact that it allows a health educator to become more acquainted with culture-bound syndromes that are unique and unusual to our specific field of study.Guarnaccia and Rogler and their research on culture-bound syndromes is informational in that they give a comprehensive look at culture-bound syndromes through the classification system and allow one to focus more on specific syndromes, such as Koro and Latah. LaVeist and Thomas from Chapter 5 in Minority Populations and Health are really informational along the lines of mental health, mental illness, and mental health problems.They give a more thorough explanation of basic background information on the previously stated information and topics and yet still remain in-depth when looking at specific aspects of mental health. They describe mental health, mental health problems, and mental illness in more detail and allow for the interpretation of others reading their work to help fuel o ne’s own judgments on those topics. I also used various sources to address other topics relevant to culture-bound syndromes. For example, Bernstein and Gaw specifically addressed Koro, which I used as an example of a culture-bound syndrome.Another example, Simon and Hughes addressed Latah, I felt it was necessary to use examples of both Koro and Latah to help show what culture-bound syndromes were exactly and what they meant to cultures that were not American and how the cultures that were affected by these syndromes. The method I used for identifying and locating sources mainly dealt with trying to find a broad aspect of culture-bound syndromes and basic information on this particular subject. The rationale for choosing the specific sources was along the lines of being able to find enough useable information that could allow me to get my points across.When searching the electronic databases and the library at Central Arkansas University I was mainly looking for a broad range of topics that could fulfill the various information needs I had for this paper. I wanted to look at the topic on multiple levels, including cross-cultural, the way culture-bound syndromes affect others, and the ways in which these disorders are specifically associated with mental illness. Analysis & Discussion The grouping of culture-bound syndromes into qualified diagnostic categories usually is based on a perception of their principal indicators.But the bigger issue itself of classifying a majority of symptoms is definitely challenging, as exemplified in the cases of Koro and Latah. Problems most definitely arose when conclusions were built on general, typical descriptions of the syndrome that are then linked with the textbook criteria of psychiatric diagnoses. The present method of studying the same set of readings and engaging in the classification process with them does not, from my viewpoint, promote the consideration of culture-bound syndromes.The approach of trying to find the right classificatory organization by basing it on the similarity between certain symptoms that include maybe one or two of the same grouping within the syndrome as well as the DSM groupings as the main organizing arrangement of significance to the culture-bound syndromes is not expected to produce new answers to the questions about the classification system. There are many syndromes that have different names that are seen from a variety of cultures that are basically the same set of behaviors, but culturally are explained in slightly different ways.Occasionally, on certain remote instances the arrangement of the behavior that is recognized as a culture-bound syndrome occurs in an area that is far from individuals where the termed and elaborated syndrome is an endemic. Conclusion & Recommendations Some major challenges that can help the classification system out is that the same distress responses may be stated differently as a result of cultural cues, language variances , and changes in experience.In addition, the American Psychiatric Association (1994) notes that some examples of cultural structuring and or human behavior knowledge regarding illnesses are stated in Western classification systems more commonly known as the DSM. Thus, the challenge to categorize culture bound syndromes, whether as diverse syndromes or as part of an already categorized illness, is an activity that is inseparably tied to a certain culture. Also it has been suggested the ways that cultures and their social methods can limit the expansion of an internationally valid system of identification.Guarnaccia and Rogler (1999) suggests that classification of culture-bound syndromes are better than recording symptoms due to the fact that examining the context and symbolic structure of cultural reactions yield a better turnout. The main themes of most discussions over culture-bound syndromes is that such illnesses personalize symptom patterns that are somewhat linked in some sign ificant way to the specific cultural setting in which they have occurred within.Because most of the syndromes are separate from the theoretical outlook of the Western medicine systems, they are quite often disregarded in serious analyses and therefore are carelessly overlooked for helpful mediations. These disorders appear to reside in a figurative twilight zone of psychiatric diagnosis and are viewed as highly mysterious. To nearly everyone, the behavior and outlooks common to one’s own culture seem natural and/or rational in most parts, while those derived from other cultures appear abnormal, culture-specific, or arising from irregular conditions.Most clinicians are more than likely to think through the justification of culture when presenting a patient’s problem, especially when he or she is from a cultural setting other than the clinician’s own. However, cultural factors are a considerable part of every disorder and expressive in the outlook of specific comp onents. Nonetheless, all psychiatric illnesses are culture bound to a certain degree. The divisions of psychiatric illnesses of culture-bound syndromes are those found only in inadequate cultural areas.Though culture does shape all illness behavior, it is always hypothetically informative to ask why any given syndrome appears to be present or not in a given culture. In recent years, the mindfulness of cultural diversity and of the role of culture in all illnesses has greatly been improved. Because of the interpretations into the relationships between individual psychopathology and culturally firm practices and beliefs that the study of culture-bound syndromes offers, an interest in these syndromes has grown greatly over the past several years.Health educators in dealing with culture-bound syndromes would be able to help Center for Disease Control officials in many aspects. Since culture-bound syndromes are very common among many cultures around the world, health educators who deal w ith particular syndromes could help assess and implement many programs that can help with assessing many syndromes that afflict many cultures throughout the world. In a classroom setting, health educators can teach students how to spot syndromes and treat them to an extent in which helps their particular culture, community or society.Health education programs that are implemented within colleges and universities can stress that culture-bound syndromes are very serious and need to be treated like any other mental health disease that we as educators deal with and try to diagnose every day. I believe that policies and procedures that are already implemented within our culture are doing a good job in trying to handle culture-bound syndromes. Educationally, I believe that there are definitely some great programs that try to help with identifying and dealing with culture-bound syndromes.References American Psychiatric Association (APA). 1994). Diagnostic and Statistical Manual of Mental D isorders, Fourth Edition: DSM-IV. Washington, DC. Bernstein, R. L. , & Gaw, A. C. (1990). Koro: proposed classification for DSM-IV. American Journal of Psychiatry, 147, 1670-1674. Guarnaccia, P. J. , & Rogler, L. H. (1999). Research on culture-bound syndromes: New directions. American Journal of Psychiatry, 156(9), 1322-1327. Hall, T. M. (2008). Culture-bound syndromes in China. Retrieved from http://homepage. mac. com/mccajor/cbs. html LaVeist, T. A. , & Thomas, D. (2005). Mental health. In T. A. LaVeist (Ed. Minority populations and health: An introduction to health disparities in the United States (pp. 83-107). San Francisco, CA: Jossey-Bass. Levine, R. E. , & Gaw, A. C. (1995). Culture-bound syndromes. Psychiatry Clinic North America, 18, 523-536. World Health Organization (WHO). (1992). International Classification of Diseases, 10th Edition (ICD-10): Classification of mental and behavioral disorders. Geneva, Switzerland. Simons, R. C. , & Hughes, C. C. (1985 ). The culture-bound syndromes: Folk illnesses of psychiatric and anthropological interest. Dordrecht, Netherlands.

Word Choice Around vs. Round

Word Choice Around vs. Round Word Choice: Around vs. Round Are the words â€Å"around† and â€Å"round† interchangeable? Yes. Except for when they’re not. The problem is that these terms have several uses between them, but only some uses overlap. To make sure your written work is error free, then, check out our guide to using these words correctly. Around and Round (Positions and Movements) We typically use â€Å"around† to describe the position or movement of something. This can include any of the following: Moving in a circular motion or following a perimeter Surrounding or being surrounded by something Being near to or in the general proximity of something In each of these cases, â€Å"around† works as either an adverb or a preposition. We can see how each use works in practice in the examples below: We started by walking around the edge of the field. There were trees all around. We checked to see if there were any farms around. We can also use â€Å"round† in any of these sentences. For instance: We started by walking round the edge of the field. There were trees all round. We checked to see if there were any farms round. When discussing the position or movement of something, then, you can treat â€Å"around† and â€Å"round† as synonyms. However, â€Å"around† is usually the better choice in formal writing. Approximations and Rounding Another use of â€Å"around† is as an adverb meaning â€Å"roughly† or â€Å"approximately.† For example, we could say: I have around $150 to last the next month. But even if we can use â€Å"around† in relation to numbers, this should not be confused with â€Å"rounding† a number up or down. Nor is it the same as describing something as a â€Å"round number† in math. Other Uses of Round The word â€Å"round† has other uses as a noun, verb, and adjective. As a noun, for example, it can mean any of the following: A stage in a process or competition (e.g., A round of golf†¦) Something cut into a circle (e.g., Pastry rounds†¦) Drinks bought for a group of people (e.g., I’ll get the next round†¦) A shot from a gun (e.g., They fired three rounds into the air†¦) As a verb, meanwhile, in addition to â€Å"rounding† a number, it can refer to: Moving around something (e.g., Rounding a corner†¦) Forming something into a circle (e.g., He rounded his lips and blew†¦) Finally, as an adjective, it can mean â€Å"circular† or â€Å"plump.† In short, â€Å"round† has a lot of meanings! However, we cannot use â€Å"around† in its place for any of these noun, verb, or adjective uses. Summary: Around or Round? While â€Å"round† can be an informal alternative to â€Å"around† when used to describe the movement or position of something, this is not the case with other uses of these words. Remember: Either around or round can be used to describe the movement or position of something. However, â€Å"around†Ã‚   is more formal. We also use around to say that something is a rough estimate, but we cannot use â€Å"round† as a synonym in this case. The word round has many other uses as an adjective, a noun, and a verb. However, you cannot use â€Å"around† in its place for these uses. So it is only with respect to movement or positioning that these terms are interchangeable. And if you’d like help checking you’ve used these terms correctly, just let us know.

Strontium Facts (Atomic Number 38 or Sr)

Strontium Facts (Atomic Number 38 or Sr) Strontium is a yellowish-white alkaline earth metal with atomic number 38 and element symbol Sr. The element is known for producing red flames in fireworks and emergency flares and for its radioactive isotope that is found in nuclear fallout. Here is a collection of strontium element facts. Fast Facts: Strontium Element Name: StrontiumElement Symbol: SrAtomic Number: 38Appearance: Silvery-white metal that oxidizes to pale yellowGroup: Group 2 (Alkaline Earth Metal)Period: Period 5Atomic Weight: 87.62Electron Configuration: [Kr] 5s2Discovery: A. Crawford 1790 (Scotland); Davey isolated strontium by electrolysis in 1808Word Origin: Strontian, a town in Scotland Strontium  Basic Facts There are 20 known isotopes of strontium, 4 stable and 16 unstable. Natural strontium is a mixture of the 4 stable isotopes. Properties: Strontium is softer than calcium and decomposes more vigorously in water. Finely divided strontium metal ignites spontaneously in air. Strontium is a silvery metal, but it rapidly oxidizes to a yellowish color. Because of its propensity for oxidation and ignition, strontium is typically stored under kerosene. Strontium salts color flames crimson and are used in fireworks and flares. Uses: Strontium-90 is used in Systems for Nuclear Auxilliary Power (SNAP) devices. Strontium is used in producing glass for color television picture tubes. It is also used to produce ferrite magnets and to refine zinc. Strontium titanate is very soft but has an extremely high refractive index and an optical dispersion greater than that of diamond. Element Classification: Alkaline earth metal Biological Role: Radiolarian protozoa belonging to the group Acantharea make their skeletons of strontium sulfate. In vertebrates, strontium replaces a small amount of calcium in skeletons. In humans, absorbed strontium is primarily deposited in bones. In adults, the element only attaches to bone surfaces, while it can replace calcium in growing bones of children, potentially leading to growth problems. Strontium ranelate can increase bone density and reduce the incidence of fractures, but it also increases the risk of cardiovascular problems. Topically applied strontium inhibits sensory irritation. It is used in some toothpastes to reduce sensitivity. While stable strontium isotopes present no significant health threat, the radioisotope strontium-90 is considered dangerous. Like the stable isotopes, it is absorbed into bones. However, it undergoes beta-minus decay and thus poses a radiation hazard. Strontium Physical Data Density (g/cc): 2.54Melting Point (K): 1042Boiling Point (K): 1657Appearance: Silvery, malleable metalAtomic Radius (pm): 215Atomic Volume (cc/mol): 33.7Covalent Radius (pm): 191Ionic Radius: 112 (2e)Specific Heat (20 °C J/g mol): 0.301Fusion Heat (kJ/mol): 9.20Evaporation Heat (kJ/mol): 144Pauling Negativity Number: 0.95First Ionizing Energy (kJ/mol): 549.0Oxidation States: 2Lattice Structure: Face-Centered Cubic Sources Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. ISBN 0-08-037941-9.Lide, D. R., ed. (2005). CRC Handbook of Chemistry and Physics (86th ed.). Boca Raton (FL): CRC Press. ISBN 0-8493-0486-5.Weast, Robert (1984). CRC, Handbook of Chemistry and Physics. Boca Raton, Florida: Chemical Rubber Company Publishing. pp. E110. ISBN 0-8493-0464-4.

Shangri-La Hotels Essay Example | Topics and Well Written Essays - 1750 words

Shangri-La Hotels - Essay Example This issue of the Chinese employees being shy about making executive decisions even in cases where they are given the power to do was becoming even more emphasized now that western hoteliers were coming to town. Apart from that, wages are being driven up by the new hotels arriving here and poaching their employees. This added to the new challenges the hotel was already having. Not only were the new hoteliers raising the standards with regard to human resource, especially frontline personnel, but they were also a risk in that they were now driving employee turnover rates for Shangri-La Hotels which prior to this were always low and way below the industry average. Started in the 1971 by a Malaysians-Chinese tycoon, the name of the hotel means eternal youth, peace and tranquility. This is one tradition that Shangri-La Hotels has tried to live by since its inception in 1971. The Shangri-La Hotels has expanded over the years and by 2006, it was the biggest hotel in luxury hotels subsector in south Asia. Although the Shangri-La Hotels has continued to expand its business elsewhere, it has maintained its growth in the East Asian market and especially in China. China had the best and favorable economic conditions which inspired growth due to the growing urban wages as the Chinese economy booming since the 1080s. as a result, the hospitality sector was being boomed as more tourists, both local and international increased demand for hospitality services. This helped the firms to protect itself from the economic recession that hit South Asia in 1997-1998 because during this time China was spared from the Asian economic recession and thus Shangri-La Hotels, having placed its foundation mainly in China was in a safe haven. In its priority, Shangri-La Hotels wants to make sure that it is able to give the best services to the customers. This is challenged by a number of

Convergence the use of bothTechnology and Physical Security Research Paper

Convergence the use of bothTechnology and Physical Security - Research Paper Example Unlike in the past, corporate assets are now information-based. This has prompted corporations to integrate both physical and information security measures to prevent unauthorized access to the corporate assets. In addition, the rapid advancements in the technology sector has brought into question the effectiveness of security functions in preventing criminal attacks in organizations. Explored in the research are the implications of adopting security convergence within an organization, analysis of trends affecting security and loss prevention, and evaluation of non-traditional approaches to crime prevention from a multi-disciplinary approach. As mentioned, physical security deters unauthorized individuals from accessing facilities. There are several types of deterrence methods, which function by convincing attackers that imminent attacks on a facility are futile due to the presence of strong defenses. They include physical barriers, security lighting, natural surveillance, intrusion detectors/ electronic surveillance, access control among others. Physical barriers represent the outermost layers of security measures, which include fences, warning signs, and vehicle barriers. Their sole purpose is to delay attacks by acting as psychological deterrents. Security lighting installed at entrance points such as gates and doors deter unauthorized entrants, as guards can clearly see the well-lit areas. Natural surveillance entails altering the design or architecture of a facility’s perimeter to prevent unauthorized entry; for example, the vegetative cover between the fence and the facility’s walls is less dense givi ng guards a clear line of sight. Intrusion detectors/ electronic surveillance comprise of alarm systems, which function by alerting security personnel when unauthorized entrants attempt to trespass a secured area. Without prompt response from security personnel, alarm systems prove futile in preventing unauthorized