Economics Issues Coursework Example | Topics and Well Written Essays - 500 words

Economics Issues - Coursework Example Consumers play a key role in perpetuating discrimination in the labor market through their choices and consumption patterns. If consumers prefer one commodity over another, they will lower demand in that labor market in which they do not prefer their goods.  Consumers play a key role in perpetuating discrimination in the labor market through their choices and consumption patterns. If consumers prefer one commodity over another, they will lower demand in that labor market in which they do not prefer their goods.  The law of diminishing marginal utility states that as consumption of a given commodity is increased by an individual while keeping the consumption of other products constant, there will be a decline in the marginal utility of the individual that is derived from the consumption of each and every additional unit of the product. The law of diminishing marginal utility does not contract the notion that individuals always want more of all goods because they are limited by the ir budget constraint hence they cannot acquire all that they want at any given instance.  Properties of indifference curves(a) NonintersectionIndifference curves cannot intersect each other because, at the point of tangency, the curve on the higher side will yield much more of the two commodities as compared to the lower curve hence they can never intersect.  (b) Convexity to the origin(c) The higher the indifference curve, the higher the level of satisfaction. The consumers will prefer to choose higher indifference curves since they aim at maximizing their utility.  (d) Negatively sloping. The indifference curves are negatively sloping because the consumer must give up the consumption of one commodity in order to consume more of the other commodity.  

Security breaches and incident handling in organization Research Proposal

Security breaches and incident handling in organization - Research Proposal Example nctions Interest of management to gain control for the security of business functions along with cost These three factors need to be handled to provide better security. In order to tackle all three factors, Christian Fruhwirth, recommended an event based intrusion detection system in 2008. The system will support these three factors by (, SWBC - Thesis: Improving security incident management in multination IT service providers - Software Business Community): Advanced tools incorporated with IDS to detect intrusions and eliminate attacks Standardized frameworks to handle legal compliance Efficient security management application tools to handle the management. Moreover, an article was published related to compromise recovery and incident handling. The article highlighted mishaps from concerned security administrators for installing default programs from a compact disc. These stored programs on a compact disc facilitates hackers to breach security by storing porn contents, configuring an illegal server, initiating attacks on other information assets and breaching server on the network. In order to eliminate all these threats and vulnerabilities, reviewing and learning the functionality of threats is essential. This will certainly reduce the probability of security incident in organizations (Compromise Recovery and Incident Handling. 2003). One more research was conducted related to a Proposed Integrated Framework for Coordinating Computer Security Incident Response Team. Conventionally, computer security incident response teams (CSIRT) are responsive for viruses, hacking and unauthorized access of employees. The CSIRT is defined as â€Å"Computer security incident response team (CSIRT) is a term used by the CERT Coordination Center (CERT/ CC) to describe a service... This will certainly reduce the probability of security incident in organizations (Compromise Recovery and Incident Handling. 2003). One more research was conducted related to a Proposed Integrated Framework for Coordinating Computer Security Incident Response Team. Conventionally, computer security incident response teams (CSIRT) are responsive for viruses, hacking and unauthorized access of employees. The CSIRT is defined as â€Å"Computer security incident response team (CSIRT) is a term used by the CERT Coordination Center (CERT/ CC) to describe a service organization that responds to computer security incidents† (Computer Security Incident Response Team. 2007). The research transformed these teams in to efficient tools that will maintain efficiency of business operations, compliance along with new regulations and homeland security. Those organization possessing incident response teams follows a systematic approach and steps to recover the system efficiently from any securi ty breach or incident. Moreover, the existence of teams, eliminates loss or information theft and service disruption. Furthermore, the information gained by detecting and resolving an incident, facilitates support teams to be more efficient for handling future incidents (, Central Washington University - Networks: Incident Handling).Likewise, these teams are called security incident response teams (SIRT). They are triggered when a security breach shows its existence within the network of an organization. However, these teams conduct investigation of suspect workstations and servers.

Case Study 3 - TechSoup Global and NetSquared Example | Topics and Well Written Essays - 1250 words

3 - TechSoup Global and NetSquared - Case Study Example According to Greenberg (2009) NPOs particularly benefit from social media as compared to traditional communication methods mainly because communication via social media brings prospects for the organization costs getting lowered along with the lowering of cost of delivering services. Also the idea of being a part of the emergence of new social patters is highly promising for the Non Profit Organizations as compared to association with the conventional traditional communication means. Merilainen (2011) narrates that since the main aim of NPOs and NGOs is to make their point of views prevalent into the public and to political agendas communication is extremely essential for them. The main aim is to involve public opinion into their proposed changes and thoughts and gain favor from the masses. This purpose is served without the involvement of any finances via social media. The propagation via social media is also thought to get more responses since people can affirm their opinions and s upport free of cost and they do not have to physically get involved in the scenario. This flexibility of use promotes the involvement of public. ... Social networks are forums where all kinds of individuals and organizations make the impression of their virtual entity. Entertainment personnel and politicians make use of the popularity and widespread reach of the Social Networks and social media. They are usually active on these communication mediums and can therefore be reached very easily via it. Common public is also one of the potential audiences that the NPOs would try to reach. The promoting of their causes would be done well if the support of the common masses is with them. Regarding the potential means of accessing NPO audiences via Social Networks and Social Media Lassila (2010) mentions that Social Network Services incorporate viral marketing as one of their main marketing strategies. It is via viral marketing only that Non Profit Organizations are enabled to reach massive number of audiences. The author quotes the example of American Red Cross who incorporated the SNS viral marketing strategy and spread their messages t o their audiences via their celebrity followers on twitter. Inside Facebook.com's author Smith advises the NPO's marketers that the trusted referrals within social media are the most powerful marketing message. Via viral marketing available in Social Media NGOs and NPOs can segment their target audience groups based on persons' interests. This way the audience feel the messages of the NPOs to be more personalized and get inclined towards them. Via the viral messaging to all kinds of audiences on social media the NGOs can also tell about their donation possibilities (Regan, 2011). One advantage of this strategy is that personal presentations of the NPOs get enhanced as a result of it

Land Law Essay Example for Free

Land Law Essay Some of the essential requirements of easements are the presence of a dominant and a servient tenement. In general, dominant tenements are estates that are either fee simple or leasehold; moreover, easements cannot exist in gross or in the absence of a dominant tenement. Further, it is essential for an easement to bestow on the dominant tenement either a benefit or some form of accommodation. This makes it mandatory for the accrual of a tangible benefit to the dominant tenement. Consequently, the easement should make it possible for the dominant owner to utilize the dominant tenement to a greater extent and the benefit conferred must pertain to land. In addition, the dominant and servient tenements should be sufficiently proximate to each other. Moreover, the owner or occupant of the dominant and servient tenements should be different persons. Furthermore, such easement should be eligible to be made the subject matter of a grant by deed. Such a requirement further entails that the granted right is unambiguous, capable of adequately precise definition. In addition, such subject matter should be in concord with the nature of the easement, which in other words, connotes that the easement does not permit exclusive and unrestricted use of the land . Furthermore, the grantee must be competent, and not some indefinite entity. Such a grantee should possess an interest in the dominant tenement at the time of the grant. Moreover, a grantor who is competent to grant such a right should exist and while making the grant, the servient owner should possess an interest in the concerned tenement that is equal to or greater than the interest that devolves from the tenement. There are a few interests that exist in respect of the land bestowed on a land owner, which are conceded by the courts. In one important case, Hill v. Tupper , Pollack C B stated that â€Å"A new species of incorporeal hereditament cannot be created at the will and pleasure of the owner of property; but he must be content to accept the estate and the right to dispose of it subject to the law as settled by decisions or controlled by Act of Parliament† . Moreover, an easement should accommodate the dominant tenement. The right of easement provides a personal advantage; that is related to the land owned by that party. This right enhances the advantage of its enjoyment . There are four components that govern easement in order to accommodate dominant tenement. First, the right to easement requires an improvement in the position of the dominant tenement into an enhanced and convenient property instead of converting it into a personal advantage of the dominant owner. Second, the dominant and servient tenements need to be located proximally so that the easement provides a potential benefit to the dominant tenement. For instance, a track used for carts, which caters to the needs of the farmer and accommodates the farming activities of the farmer, could be located far away from the farm. Third, the users should be disconnected and fourth, there should not be any personal advantage. This had been established in the aforementioned case of Hill v Tupper, in which the owner of a canal leased the banks of the canal and the right to operate boats on the canal to the defendants. In this case the court held that the claimant had a personal interest and thus was precluded from defending against third party actions . Not every right that is granted in respect of land constitutes an easement. For instance, if one person gives another the right to cross his land, which is located at an appreciable distance from the other person’s land, then such a right is not an easement. This was clearly established in the Hill v. Tupper case, wherein the Basingstoke Canal owners extended exclusive rights to the plaintiff to hire boats that would be used for recreational purposes. This business of the plaintiff was jeopardized by the defendant who commenced to compete with him . Instead of filing a breach of contract against the owners of the Basingstoke Canal, the plaintiff, filed a case against the defendant pleading that the defendant was liable in nuisance to him. The Court of the Exchequer, which was hearing this case, expressed its lack of competency to generate, rights that were unrelated to the enjoyment of land and appropriate them to the land with the objective of forming a property in the grantee. However, the plaintiff did possess property that adjoined it . The reason for such a decision can be construed to be that the court was disinclined to permit a commercial benefit to be construed as an easement. This tendency of the courts is clearly established in the case of Moody v. Steggles. In this case an advertisement of a public house was displayed in the defendant’s adjoining land. The court held that the right under dispute pertained to the plaintiff’s business and therefore was unconnected to the right of easement. Thus the easement and the manner in which the land had been occupied were intimately connected . The court decided in the case of London and Blenheim Estates V Ladbrokeretail Parks that a tenement that was dominant had to be adequately identified as such and that it must be sufficiently described so as to render the easement binding on the servient tenement. The appellate court held that it was inadequate to merely grant the right to nominate unspecified land as constituting a dominant tenement in respect of an easement, in order to generate an interest in the land that would serve to bind successors in title to the servient tenement . It is essential for different persons to possess dominant and servient tenements, because an easement constitutes a right over somebody else’s property. Pollock CB, made the distinction between proprietary and personal rights, crystal clear when he opined that ‘A grantor may bind himself by covenant to allow any right he pleases over his property, but he cannot annex to it a new incident, so as to enable the grantee to sue in his own name for an infringement of such a limited right as that now claimed. The sum and substance of this statement is that a number of rights can be created that are governed by contract. Further, it is permissible for a leasehold tenant or a fee simple owner to grant easements. However, a tenant can do so only during the pendency of the lease. If these requirements are not fulfilled, then there is no easement, despite the possible existence of a restrictive covenant, license or lease. With the case of Hill v. Tupper it became evident that an easement must accommodate the dominant tenement. For an easement to be valid, it has to necessarily bestow some benefit on the land, rather than on the owner. In the Hill case the servient tenement was a waterway and lease granted to the claimant was in respect of some land that adjoined this canal. In addition, the claimant was exclusively permitted to make available pleasure luxury boats on this canal. The court however, held that the conduct of business on the servient tenement was insufficient to bestow an easement on the claimant and that it constituted nothing more than a license. Moreover, the court held that the claimant was making a blatant claim to ensure a commercial monopoly. Furthermore, the court decided that no easement could specify the exclusive use of a servient tenement in order to exclude other reasonable users . In Dyce v. Hay there was a claim that all the Queens subjects had the right to go at all times upon the†¦appellants property†¦for the purpose of recreation. It was held that There can be no prescriptive right in the nature of a servitude or easement so large as to preclude the ordinary uses of property by the owner of the lands affected . As per Lord St. Leonards, the class of servitudes and easements should change and widen in their applicability in accordance with the changes in society and the human condition . This opinion has to be interpreted, while bearing in the mind the maxim that English law does accord, with the exception of statute, recognition to an easement in its entirety. In other words easement should be restrictive. The judgment in the Dyce case makes it very clear that the judiciary was not disposed to expanding the category of easement in order to include rights that had not been recognized by the extant statute. In general some rights are not recognized by the courts as easements. These are a right to a view; a general right to loiter on some other person’s property and a right to shelter oneself from the elements with the help of neighbouring buildings. However, it was clearly demonstrated in the Dyce case that such a list of rights is not conclusive and could be expanded if so required. Although, the list of rights that could be construed to be easements cannot be enumerated, nevertheless, such rights should be similar to those rights that have been accorded the status of easements by law. However, the courts have been reluctant to permit new rights to be accorded the status of easements.

Problem Cell Phones Essay Example for Free

Problem Cell Phones Essay A mobile phone (also known as a cellular phone, cell phone, and a hand phone) is a device that can make and receive telephone calls over a radio link while moving around a wide geographic area. It does so by connecting to a cellular network provided by a mobile phone operator, allowing access to the public telephone network. By contrast, a cordless telephone is used only within the short range of a single, private base station. In addition to telephony, modern mobile phones also support a wide variety of other services such as text messaging, MMS, email, Internet access, short-range wireless communications (infrared, Bluetooth), business applications, gaming and photography. Mobile phones that offer these and more general computing capabilities are referred to as smartphones. Disadvantages Advantages of Cell phone According to : http://vidyaprakash. expertscolumn. com/article/disadvantages-cell-phones Cell phone is playing an important role in this modern world. It is very hard to see a person without a mobile phone. Even a little kid have the ability to access the cell phone fluently without any problem. Kids are very much interested in playing games in mobile phone and spending a lot of time with it. As we know too much of cell phone usage is not good for us and it will give some unwanted health issues. Cell phone will create some unwanted radiation which is not good for our brain. A person who is using cell for a long time will surely get health issues due to it. We must control our cell activities. Avoid using it for a long time and use it whenever necessary. Listening music using the ear phone is the new trend of the youngsters and most of the persons are interested in listening music with their hands free while riding their two wheeler. Really it is a dangerous thing which causes a lot of unwanted accidents. Most of the two wheeler accidents are happened due to this activity. Now we are living a fast life and dont have enough time to meet our friends and family members. Simply we make a call to them and ask about their updates. Previously people will meet their friends and beloved persons directly and ask about their present status, but now it is easy to communicate with anyone using the phone and most of the persons are converted to this trend it reduce the get together and social reunions a lot. Students will get diversion with cell phones, they are spending a lot of time with cell phone chatting and browsing online through their smart phone and reduce their studying activity. Most of the students are turned as cell phone and online addicts which is a great disadvantage. There is nothing wrong in using cell phone, we must use it in a limited manner to avoid unwanted issues due to it. Statement of the problem Cell phones have recently become an asset to society. Because of this, many of the negatives to cell phone ownership have been overlooked. Just a few of these problems are : Increases the likelihood of traffic accidents Increases the risk of brain cancer Scope and Limitations The research that I will conduct is only limited to students, particularly 4th year – Springtime batch 2013-2014 II. Review of related Literatures This section presents a summary of previous research materials. Information found within this section is all found in the web and journals. Cell phones do more harm than good According to: http://en. wikipedia. org/wiki/Mobile_phone A hand-held mobile radiotelephone is an old dream of radio engineering. Arthur C. Clarke in a 1959 essay, where he envisioned a personal transceiver, so small and compact that every man carries one. He wrote: the time will come when we will be able to call a person anywhere on Earth merely by dialing a number. Such a device would also, in Clarkes vision, include means for global positioning so that no one need ever again be lost. Later, in Profiles of the Future, he predicted the advent of such a device taking place in the mid-1980s The most commonly used data application on mobile phones is SMS text messaging. The first SMS text message was sent from a computer to a mobile phone in 1992 in the UK, while the first person-to-person SMS from phone to phone was sent in Finland in 1993. Mobile phones are used for a variety of purposes, including keeping in touch with family members, conducting business, and having access to a telephone in the event of an emergency. Some people carry more than one cell phone for different purposes, such as for business and personal use. Multiple SIM cards may also be used to take advantage of the benefits of different calling plans—a particular plan might provide cheaper local calls, long-distance calls, international calls, or roaming. The most advantage of having mobile phone is you can communicate with your family, and friends no matter where you are. Cell phones also have applications for listening to music, playing games, and surfing the net. Besides that, there are lots of disadvantages. Using mobile phones can harm our brains, especially for those who are under the age of sixteen. Excessive use of mobile phones has been accused of causing dizziness, and â€Å"radiations emitted from the phone are harmful for the eardrum†, say many scientists. In addition, when we use mobile phones while driving it causes unwanted accidents. Negative effects of cell phones on our brain Radiation from mobile phones may cause brain tissue damage, a two-year study has found. Scientists discovered that emissions from handsets affect the delicate make-up of cells in blood vessels, and could be a health hazard to regular users of the UKs 50million mobile phones. The radiation might disable a safety barrier in the body which protects the brain from harmful substances in the blood, they believe. It is the first time scientists have used cells from human blood vessels rather than rats, bringing researchers closer to the truth about long-term mobile phone use. Despite the millions spent on research in the last decade, the health implications of sustained use are still unclear. The biggest British study, led by Sir William Stewart, found two years ago that there was no evidence of a risk to health. A study published last year by the American National Cancer Institute also could not find a link between increased risk of brain cancer and mobile use. III. Research Methodology Research Design Name: Age: Sex: 1. How often do you use your cell phone ? 2. Do you know that using cell phone too much causes unwanted damages to the brain ? If yes. Do you believe that children below 10 years of age shouldn’t use cell phones ? 3. Is it really necessary for a person to have a cell phone ? Explain. 4. Is cell phone a disadvantage or advantage to your life ? Explain. Data Gathering Procedure The researcher will randomly ask ten (10 ) representatives out of the 37 students in the 4th year. A questionnaire was prepared by the researcher that will be used as a reference. The survey was conducted through the net. IV. Analysis and Interpretation of Data This chapter presents the findings, analysis and interpretation of data gathered by the researcher whose main objective is to find out the different perspectives of people and to find out what kind of damage our cell phone will do to our brain and also to state some advantages of it. Through my research I’ve found out that many scientist have and will conduct research about the radiation that we can get from cell phones. Mostly scientist from America conducts these kinds of researches. I also found out that the radiation of the cell phone emits is dangerous to all of us. Especially those who are 16 years of age and below. I also found out that there is not enough proof that cell phones can really damage our brain. Someone said that it is early for us to conclude that cell phones are bad for our health. Because even scientists can’t really find the right answer to our questions. A scientist said that we don’t know what will be the impact of the radiation of the cell phone emits will do to us if we still use it for the next 10 or even 20 years. He also said that that is the reason why we need to conduct more studies. According to my survey 9 out of 10 said that they always use their cell phones. 9 out 10 said that they know that using cell phone too much causes unwanted damages to the brain. 10 out of 10 said that having cell phone is necessary because it’s time for us to upgrade and use the cell phone to communicate and because it is easier to do, it also takes less of our time if we use our cell phones as I have said in my introduction cell phones are wireless, we can use them anywhere. 5 out of 10 said that cell phones are advantages to their lives. Because it makes almost everything easy. 1 out of 10 said that it is a disadvantage because is makes us lazy. 4 out of 10 said that they pick advantage and disadvantage.

Differentiate Between Stress And Strain Engineering Essay

Differentiate Between Stress And Strain Engineering Essay When stretching a material, the length changes and the strain become positive. More strain means that more stress to the object once compress. When the material is compressed, the length changes and strain becomes negative. This obeys to the law of the stresses where go together with these strains, tensile stresses being positive and compressive stresses negative. http://studentweb.usq.edu.au/home/w0036795/etassgn_4/images_unit02/unit2_image36.gif Figure above shows the relationship between stress and stain as the stress is directly proportional to strain. There is a relationship where the force applied and the object changing in physical shape. It has revealed that the elastic behavior can be defined thru some relations with the form that the physical state changes is small in related to the original. This relationship can defined as Hookes Law ( F = -kx) Question 2 Pyrometer is used for measuring temperature. Discuss in details four principal techniques for the measurement of temperature. State the typical applications of different types of pyrometers A pyrometer used to measures heat from an object which has visible in bright or radiant. Pyrometers consider as thermometers where scientists use it to define the heat and heat type given out from an object. The critical variation between a pyrometer and other types of thermometers is the radiant levels on or after the heated objects are typically far too hot for interaction. That is why pyrometers have visual scanners that measure the heat. Four principal techniques for measurement of temperature. IR Pyrometers for Surface Temperatures The spectrum lies at wavelengths longer than light however shorter than microwaves or measuring system. IR pyrometers usually operate with wavelengths from two to twenty microns, reckoning on the material being measured. Plancks law states that the emissive power of a black body contains a spectral distribution reliant on the body temperature. This can be a well-known matter, thus there are numerous strategies to avoid this matter with variable target emissivity. IR Gas Temperature Pyrometers IR pyrometer functional at a wavelength consistent to the combustion emitted products, such as CO2 gas radiation (at 4.26 or 4.5 microns) can measure average gas temperature. This method needs gas to be combusted, meanwhile air not having a sturdy IR emission peaks. All fossil fuels produce CO2 after when it burnt, so this method is appropriate to oil and propane fired furnaces, but not for electrically heated furnaces. The temperature of the gas stately is the radiation temperature of the CO2 gases in the field of view of the lens, so choice of lens and placement is significant. 2 IR pyrometers must be located on opposite sides of the furnace to portion this temperature inhomogeneity. Whatever that blocks the assessment of the lens (as soot or dust), air penetration (less CO2 to measure temperatures) or huge differences in gas temperature with time can create the average temperature signal too strident to use straight in a control system. ACOUSTIC PYROMETERS Acoustic pyrometers is a method where used to measure the temperature of gases created on the temperature reliance of the speed of sound. The speed of sound diverges through the square root of the total gas temperature. This method stretches an average temperature completed an identified path length if the gas composition is identified and continuous. Guileless acoustical pyrometry uses the time of flight statistics for the leading wave front to reach the receiver. This is suitable on behalf of an average gas temperature for one path. The wavelengths may exist to be enormous, for instance, presumptuous a sound velocity of 880 m/s at a frequency of 500 Hz stretches a wavelength of 1.8 m. Ruptures of air can remain the basis of sound, giving an informal to connect, low-maintenance instrument. Numerous paths can be selected, which can be examined to provide 2D isothermal maps of furnace temperature problematic to crop by other resources for gas temperatures of 1650Â °C. Advantages of a coustical pyrometry embrace modest and rough equipment for industrial environments, numerous paths subsequently a single transmitter for a least amount of holes in the furnace walls for 2D temperature mapping, low operating costs and proven technology. Suction pyrometers Suction pyrometers are a method where suction is used to appeal the hot combustion gases past a thermocouple at a great velocity to decrease the fault in gas temperature measurements. Radiation shields reduce the thermal effects of radiation. Suction pyrometers are still the best industrial apparatuses for measuring combustion gas temperatures, for instance, they are used for impermanent gas temperature measurements at a specific position or for calibration of other temperature measurement apparatus. The micro suction pyrometer has been established to evade countless of the disadvantages of the suction pyrometer. Main disadvantages with micro suction pyrometers comprise their lesser accurateness and additional brittle construction comparative to conservative suction pyrometers. Types of pyrometers Broadband Pyrometer The broadband pyrometer is used to record the broadband wavelengths of radiation, typically about 0.3 microns. However furthermost repeatedly used, they can have big mistakes in readings. Subsequently they are merely registering a minor quantity of an object heat. Everything from water vapor to dust can produce a reading error. Optical Pyrometers An optical pyrometer let a scientist to observe heat though all pyrometers are optical in the sense they can recite an objects heat from a distance. An optical pyrometer is used to measures the heat infrared wavelengths and straight displays the manipulator the object heat distribution. Additional pyrometers typically have a screen to shows the results of an optical scan. An optical pyrometer can act lie a telescope where the scientists can look over a lens and see the infrared wavelengths of an object. Optical pyrometers are one of the oldest pyrometer types and are able to see the wavelength levels up to 0.65 microns. Radiation Pyrometer A radiation pyrometer is used to determine pure radiation wavelengths. The device contains an optical scanner that can perceive 0.7 to 20 microns on the range of wavelength, the overall range for radioactive heat. The optical scanner lightens the burden of scientists in measuring the radiation levels without putting the pyrometer up to the object, where it can endanger the person in charge to expose to radiation. Question 3 Draw the functional block diagram of Electrocardiography (ECG) machines and explain each in details. From the functional block diagram, answer the following: 1. What (electrically) is being measured? 2. How is the electrical signal capture? What is the sensor? How does it work? Draw a complete circuit to represent the functional block diagram What is ECG? An electrocardiogram or ECG is used to measure and analyzed electrical recording of the heart and even used to investigate heart disease. British physiologist Augustus D. Waller is the creator of electrocardiography and published the first human electrocardiogram in the year 1887. Dutch physiologist Willem Einthoven, who transformed this inquisitive physiologic phenomenon into a crucial clinical recording device, was awarded a Nobel prize in medicine. Block diagram of ECG http://edge.rit.edu/content/OldEDGE/public/Archives/P05903/WebsitePics/ECGsetup.JPG When the heart depolarizes, its suitable (and quite precise) to denote the electrical activity as a dipole which a vector between two point charges. A vector has both a size (magnitude), and a direction. The potential diverges around the volume conductor. This applies to all intra-cardiac events, so the vector (or axis) for P waves, the QRS complex, T waves, and so on. https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgSw8qwiAawGvhL2sl89HJoG52ML1tjkkVIV1aDaIMfOnYOMWMNp-Mipwm0o245xzn8klJLsg9XdBgIjL2CE9VqCgVnESynEQ6-kGNROj0LU9P1-bGRZlmA9FCuf8XjEFAMEfS9w8eRXT8/s1600/3-lead_ecg-signal+measurement.jpg The electrocardiogram, or ECG is a surface measurement of the electrical potential produced by electrical action in cardiac tissue. Current flow in ion form and signals shrinkage of cardiac muscle fibers foremost to the hearts pumping activity. The human heart can also be considered as a large muscle where the beating is just contraction of muscles. Consequently contractions of the heart create a potential. The measurement of the potential created by cardiac muscle is called as electrocardiology. Types of electric is being measured a) Bipolar leads: The position point located on one limb, the `sensing electrode can be on another limb. The leads are mark as I, II, and III. b) Unipolar leads: The position point located in some leads that joined together, and the sensing lead is located on one limb. These leads are predictably increased, in that the position lead on the limb sensed is disconnected from the other two. c) The V leads : The position where lengthen across the precordium, V1 in the fourth right interspace, V2 4th left, V4 at the apex (5th interspace, midclavicular line), V3 halfway in between V2 and V4, and V5 V6 in the 5th interspace at the anterior and mid axillary lines correspondingly. These electrode leads are usually connected to potential differences devices between selected electrodes to create the specific ECG tracings. Majority of the ECG leads are bipolar leads (e.g., standard limb leads) that apply a single positive and a single negative electrode amongst which electrical potentials are measured. Unipolar leads (augmented leads and chest leads) consist os single positive recording electrode and apply a blend of the other electrodes to assist as a merged negative electrode. Typically, once an ECG is recorded, all leads are recorded instantaneously, normally called as 12-lead ECG. How is the electrical signal capture? What is the sensor? How does it work? Cardiac electrical potential wave forms (voltages created through the heart as its chambers contract) are measured by the PASCO CI-6539A EKG (Electrocardiogram) Sensor. The sensor contains of the electronics box by a cable for connecting to the PASCO computer interface through a five pin DIN analog connector. 3 electrode leads pass in the electronics box on the side opposite the cable that assigns to the interface. The sensor signal is conveyed from side to side an opto-isloation circuit. An isolation transformer is used to transfer the sensors power. Question 5 Explain in detail idea of industrial voltage to frequency converters and frequency to voltage converters using an operational amplifier. Voltage to frequency converter The voltage-to-frequency converter is a converter which delivers an output frequency precisely relative to its input voltage. The digital open-collector frequency output is well-matched through all mutual logic families. Its adding input features give the VFC32 outstanding noise resistance and small nonlinearity. Complete output frequency is determined by an exterior capacitor and resistor. Open-collector logic output is gain from the frequency output terminal. A pull-up resistor is typically connected to a 5V logic supply to generate normal logic-level pulses. Though, it connected to some power supply (+VCC). Production pulses obligate a continuous period and positive-going throughout the oneshot period. Current flowing in the open-collector output transistor proceeds by the common terminal. The terminal must be linked to logic ground. Frequency to voltage conversion The capacitive-coupled response network C3, R6 and R7 let typical 5V logic levels to activate the comparator input. The comparator causes the one-shot on the dropping control of the frequency input pulses. Beginning voltage of the comparator is about -0.7V. 5V logic levels having less waveform for frequency input, the comparator is activated by regulating the voltage divider of R6/R7 to a lower voltage. C2 smoothens the output voltage waveform. Greater values of C2 decrease the wrinkle in the output voltage. Lesser values of C2 let the output voltage to resolve quicker in response to a modification in input frequency. Resistor R1 can be pared to attain the preferred output voltage at the complete input frequency. The signal response current is equivalent to VIN/R1. This current is combined by response op amp and C2, creating a descending ramping integrator output voltage. Once the integrator output slopes to the verge of the comparator, the one-shot is activated. The 1mA reference cu rrent is swapped to the integrator input throughout the one-shot length, producing the integrator production ramp rising. Subsequently the one-shot period, the integrator again ramps descending. The fluctuation procedure forces a long-term stability of charge (or average current) between the input signal current and the reference current. Question 6 Describe the purpose and basic operation principle of differential pressure flow meters. Differentiate between orifice plate, venturi, nozzle and pitot tube. Differential pressure flow meters It is the control of fluid flow rate by interpretation the pressure loss thru a pipe restriction is possibly the greatest where usually used flow measurement method in industrialized uses (Figure 2-1). The descent of pressure created by a extensive variability of geometrical restrictions have been well considered over the years. These primary or head flow elements originate in a extensive diversity of configurations, all with exact application assets and flaws. Differences on the refrain of differential pressure (d/p) flow measurement http://www.omega.com/literature/transactions/volume4/images/07_Fig_01_l.GIF Orifice plates http://www.omega.com/literature/transactions/volume4/images/07_Fig_04_l.GIF In clean liquid, gas, and steam service, orifice plates are generally used. It is obtainable for entirely pipe sizes, very economical for gauging flows in bigger pipes (over 6 diameter). Numerous standards organizations permitted the orifice plates as is used for the supervision the transfer of liquids and gases. The orifice flow calculations used today still fluctuate from each other, though the numerous standards organizations are operational to accept a solitary, generally accepted orifice flow calculation. User can select the flow equation thru orifice sizing program. Even though it is a modest device, the orifice plate can be considered as a precision instrument. Orifice plates are fairly sensitive to a change of error-inducing situations. Precision in the drag controls, the excellence of the connection, and the state of the plate itself regulate the routine. Installation influences embrace tap position and state, form of the process pipe, capability of straight pipe innings, ga sket intrusion, misalignment of pipe and orifice drags, and lead line design. Other adverse conditions comprise the corrosion or erosion of the pipes, dirt, and grease or secondary phase deposits on either orifice surface. http://www.omega.com/literature/transactions/volume4/images/07_Fig_06_l.GIF Venture tube http://www.omega.com/literature/transactions/volume4/images/07_Fig_07_l.GIF The venturi tubes is quite expensive, so they are mainly used for greater flows or on further tough or difficult flow applications. Venturis are not sensitive to velocity outline properties and consequently need fewer straight pipe run than an orifice. The character of scrubbing act of the flow through the tube creates the device resistant to corrosion, erosion, and interior scale build up. Due to high initial cost, the owner still is promising as the savings in fitting and functioning and maintenance costs. Flow element is long which considered by a narrowing inlet and a deviating outlet. The entrance is used to determine the inlet pressure, while the throat section is to measure the static pressure. The pressure taps nourish into a joint annular chamber, as long as an average pressure analysis over the whole perimeter of the element. The venturi is partial in its use to clean, non-corrosive liquids and gases. The great instability and the absence of holes in which material can gath er create flow tubes well suitable for slurry and mud services. But, maintenance costs can be high if air removal cant stop persisting of the pressure taps and lead lines. Plunger-like devices (vent cleaners) can be connected to occasionally eliminate accumulation from interior openings, even though the meter is online. Flow nozzle http://www.omega.com/literature/transactions/volume4/images/07_Fig_09_l.GIF The flow nozzle can be said it is more stable than the orifice plate, mainly in greater or higher temperature and higher velocity services as compared to orifice plates. It used to determine high flow rates of superheated vapor. The flow nozzle also having a better flow capacity than the orifice plate and needs a lesser first investment than a venturi tube, but also delivers lesser pressure recovery. A main disadvantage of the nozzle is that it is harder to change than the orifice except it can be detached as part of a spool unit. Flow nozzles preserve their accuracy for long periods, even in tough service. Flow nozzles can be very accurate way to determine gas flows. As soon as the gas velocity influences the speed of sound in the throat, the velocity cant surge any more and a overcome flow condition is extended. Pitot Tubes http://www.omega.com/literature/transactions/volume4/images/07_Fig.12_l.GIF Pitot tube is one of the simple in design flow sensors where it is used to measure varied range of flow measurement applications. Normally, it is used in air speed in racing cars and air force fighter jets. Pitot tubes also used to analyze air flow in pipes, ducts, and stacks, and liquid flow in pipes, weirs, and open channels in industrial applications. The accuracy and range capability are moderately low, while pitot tubes are modest, dependable, low-cost, and suitable for a diversity of environmental situations, plus tremendously high temperatures and a wide range of pressures.

Pearl Harbor Conspiracy :: essays research papers

â€Å"It was very apparent to everyone who had carefully followed the course of events that we would sooner or later have to meet the threat to civilization which these aggressor nations were presenting to the world†¦and that we would ultimately be left to face the onslaught alone†¦Ã¢â‚¬  are words from then Secretary of War Henry Stimson. America knew she was headed for war, her people though, not directly feeling the effects of the conflicts going on half a world away would not support the loss of American lives for a foreign war. The government knew about the planned attacks on Pearl Harbor, kept the information from the military leaders that needed it the most, and used the tragedy to rally the nation toward war.   Ã‚  Ã‚  Ã‚  Ã‚  Ã¢â‚¬Å"AIR RAID ON PEARL HARBOR. THIS IS NO DRILL.† This is the message sent out by radioman Kyle Boyer at 7:58 a.m. Sunday December 7, 1941; a date which will live in infamy. The empire of Japan had attacked the United States’ Pacific Fleet based in Pearl Harbor. For months the US Intelligence community, as well as others around the world, had been intercepting and decoding transmissions from mainland Japan to their diplomats and spies in the US. We had cracked their Purple Code, and knew exactly what military intelligence was being transmitted back and forth. The Dutch also cracked Purple and informed our government of the Japanese plan and were shocked to hear reports that we were taken by surprised. Even more disturbing, months before the attack a British double agent, Dusko Popov, codenamed Tricycle, turned over to the F.B.I. detailed plans of the Japanese air raid, which he had obtained from the Germans. The government had the information, and d id nothing with it.   Ã‚  Ã‚  Ã‚  Ã‚  The people who needed the information the most, Admiral Kimmel, commander-in-chief us pacific fleet, and General Walter Short, the army commander in Hawaii, were kept out of the loop. Why would the military keep such pertinent information from its leaders in Hawaii? Some would argue they hid the information so the Japanese would not know their code was broken. I wonder if the 2,000+ service men and civilians that died that day would share the same concern. Admiral Kimmel had been complaining about shortages of personnel, planes, and radar for months. General Short did not even know he had a special Army monitoring station on the island, and was not even cleared to see the decrypted messages known as Magic.