Retrofitting of Existing Reinforced Concrete Members with Carbon Fibre Essay

Retrofitting of Existing Reinforced Concrete Members with Carbon Fibre - Essay Example The results from the experiment generally indicated that when beams are retrofitted in shear as well as flexure by the use of carbon fibre reinforced polymer (CFRP) laminates, they become structurally efficient. In addition, they are also restored to stiffness as well as strength values which are almost equal to or in some cases greater than those of the control beam. It was evident from the results that the efficiency of the strengthening technique by the carbon fibre reinforced polymer (CFRP) in flexure was varying with respect to the length of carbon fibre reinforced polymer (CFRP) plate. Of the three failure modes identified in this experimental work, the main failure was plate debonding in the retrofitted beams. There exist many structures which, for some reasons, fall short of fulfilling the specified requirements. These reasons may include accidents (such as earthquakes), increased loading, upgrade of the design standards, lack of maintenance, construction errors as well as corrosion of the reinforcement bars. The possible remedies for such insufficiency of the structures may include either replacement or retrofitting. Either fibre reinforced polymer (FRP) or steel plates laminates can generally be used in retrofitting of bonded reinforcement to concrete structures. However, fibre reinforced polymer (FRP) is the most convenient for a number of reasons when compared to steel plates: In recent years, carbon fibre reinforced polymer (CFRP) has been widely used as an external reinforcement because it has been found to be important for the improvement of the structural performance of the reinforced concrete structures. Many research work conducted in the past on the strengthening of existing reinforced concrete (RC) beams has been mostly focused on the flexural strengthening (Obaidat et al. 2009), (Ashour et al. 2004), (Wang & Zhang 2008), (Esfahani et al. 2007) and (Wenwei & Guo 2006). On the other hand, the topic

Buyers Purchase Decision and Branding Coursework

Buyers Purchase Decision and Branding - Coursework Example The scope of the study covers all kinds of buyers with different behaviors making buying decisions with regard to different brands. There is also a detailed study on Consumer Decision Process. There is a good enough introduction on consumer buying process besides an extended and detailed introduction on Branding and Marketing emphasizing the difference between the two and how the concepts are different from each and in what way there can be a delineation between the two. There is an explanation on the different stages of Consumer Buying Behaviour, namely Need Awareness, Information Search, Checking Options, Purchase Decision, and Post Purchase Behaviour. There is also a detailed explanation on Types of Consumer Buying Behaviour in the form of Routine Response Behaviour, which is prevalent in the from of day to day items that do not need though process and are bought instantly, Limited Decision Making, which requires product research to an extent, Extensive Decision Making, which invo lves products that are unfamiliar, infrequently bought and expensive. The last form of Buyer Behaviour is the Impulse Buying that includes buying on an impulse. There is also a detailed talk about the effect of Brands on Buyer Behaviour, which includes concepts like Brand Loyalty, Influence of Brands on consumers and contribution of Brands in helping a Consumer in Buying Process, Co relation between Brand Image and self image, Brand Equity and so on. There is also an introduction of factors that influence Purchase Decision besides Brand. These factors are mentioned in the form of two main headings namely, Internal Factors and External Factors. Perceptions, Knowledge, Attitude, Personality, and Lifestyle are some such Internal Factors whereas Culture, Situation, are some of the External Factors. The final part of the study explains the general methodology to do research along with the secondary data collected. The methodology part also talks about CDP cycle in detail. The methodology part also tries to answer, why a consumer prefers some brands or stores over others and what are the basic reasons and linking factors connected to his choice. Introduction and Background In today's world where there are so many products thronged over every nook and corner of the market, it is an extremely difficult task for a buyer to choose amongst the products. Globalization has made it even more difficult with the entry of several new firms into any business. A buyer while purchasing or making a purchase decision goes through a process and reaches a final decision in favor or against the product, however Branding is perhaps the only powerful tool that not only helps a corporate establish a goodwill, but also helps a buyer in taking a fast decision regarding whether to go for a product or discard it. So Branding undoubtedly facilitates faster decision making with ease. The reason behind this phenomenon is that buyers are generally skeptical about buying any product because they have to spend money and part away from it, in lieu of some goods, which they may not trust in the beginning, until they have used and experienced them for a while. So they look up to a Brand ed product, as their savior in such an uncertainty. This purpose makes it important for us

Mathematical description of OFDM

Mathematical description of OFDM When we talk about the Mathematical description of OFDM then we cannot neglect the following mathematical treatments: The Fourier transform The use of the Fast Fourier Transform in OFDM The guard interval and its implementation As we have discussed above that a large number of narrowband carriers which are spaced close to each other in frequency domain are transmitted by OFDM. The modern digital technique that is used in the OFDM is FFT i-e Fast Fourier transform (FFT) and due to the use of FFT it reduces the number of modulators and demodulators both at the receiver and transmitter side. Fig. 4 Examples of OFDM spectrum (a) a single subchannel, (b) 5 carriers At the central frequency of each subchannel, there is no crosstalk from other subchannels. Mathematically, each carrier can be described as a complex wave: (1) sc(t) = the real part of original signal. Ac(t) = the Amplitude f c(t) = Phase of carrier (t)= symbol duration period Ac(t) and f c(t) use to fluctuate on symbol by symbol basis. Parameter values are constant over (t). As we know that OFDM posses many carriers. So the complex signals ss(t) is represented as: (2) where This is of course a continuous signal. If we consider the waveforms of each component of the signal over one symbol period, then the variables Ac(t) and f c(t) take on fixed values, which depend on the frequency of that particular carrier, and so can be rewritten: If the signal is sampled using a sampling frequency of 1/T, then the resulting signal is represented by: (3) At this point, we have restricted the time over which we analyse the signal to N samples. It is convenient to sample over the period of one data symbol. Thus we have a relationship: t =NT If we now simplify eqn. 3, without a loss of generality by letting w 0=0, then the signal becomes: (4) Now Eq. 4 can be compared with the general form of the inverse Fourier transform: (5) In eq. 4, the function is no more than a definition of the signal in the sampled frequency domain, and s(kT) is the time domain representation. Eqns. 4 and 5 are equivalent if: (6) This is the same condition that was required for orthogonality (see Importance of orthogonality). Thus, one consequence of maintaining orthogonality is that the OFDM signal can be defined by using Fourier transform procedures. The Fourier transform Fourier transform actually relate events in time domain to events in frequency domain. There are different version of FFT which are used according to requirement of different sort of work The conventional transform provide the relation of continuous signals. Note that Continuous signals are not limited in both time and frequency domain. Though, it is better to sample the signal so that the signal processing becomes simpler. But it lead to an aliasing when we sample the signals with infinite spectrum and the processing of signals which are not time limited can lead to another problem that is referred to as space storage. DFT (discrete Fourier transforms) is use to overcome the above problem of signal processing. The original definition of DFT reveals that the time waves have to repeat frequently and similarly frequency spectrum repeat frequently in frequency domain. Basically in DFT the signals can be sampled in time domain as well as in frequency domain. The Fourier transform is the process in which the signal represented in the time domain transformed in frequency domain, while the reverse process uses IFT which is the inverse Fourier transform. The use of the Fast Fourier Transform in OFDM The main reason that the OFDM technique has taken a long time to become a prominence has been practical. It has been difficult to generate such a signal, and even harder to receive and demodulate the signal. The hardware solution, which makes use of multiple modulators and demodulators, was somewhat impractical for use in the civil systems. The ability to define the signal in the frequency domain, in software on VLSI processors, and to generate the signal using the inverse Fourier transform is the key to its current popularity. The use of the reverse process in the receiver is essential if cheap and reliable receivers are to be readily available. Although the original proposals were made a long time ago [Weinstein and Ebert], it has taken some time for technology to catch up. At the transmitter, the signal is defined in the frequency domain. It is a sampled digital signal, and it is defined such that the discrete Fourier spectrum exists only at discrete frequencies. Each OFDM carrier corresponds to one element of this discrete Fourier spectrum. The amplitudes and phases of the carriers depend on the data to be transmitted. The data transitions are synchronised at the carriers, and can be processed together, symbol by symbol (Fig. 5). Fig. 5 Block diagram of an OFDM system using FFT, pilot PN sequence and a guard bit insertion [Zou and Wu] The definition of the (N-point) discrete Fourier transform (DFT) is: (DFT) (7) and the (N-point) inverse discrete Fourier transform (IDFT): (IDFT) (8) A natural consequence of this method is that it allows us to generate carriers that are orthogonal. The members of an orthogonal set are linearly independent. Consider a data sequence (d0, d1, d2, †¦, dN-1), where each dn is a complex number dn=an+jbn. (an, bn= ± 1 for QPSK, an, bn= ± 1,  ± 3 for 16QAM, †¦ ) k=0,1,2, †¦, N-1 (9) where fn=n/(ND T), tk=kD t and D t is an arbitrarily chosen symbol duration of the serial data sequence dn. The real part of the vector D has components k=0,1,..,N-1 (10) If these components are applied to a low-pass filter at time intervals D t, a signal is obtained that closely approximates the frequency division multiplexed signal (11) Fig. 5 illustrates the process of a typical FFT-based OFDM system. The incoming serial data is first converted form serial to parallel and grouped into x bits each to form a complex number. The number x determines the signal constellation of the corresponding subcarrier, such as 16 QAM or 32QAM. The complex numbers are modulated in a baseband fashion by the inverse FFT (IFFT) and converted back to serial data for transmission. A guard interval is inserted between symbols to avoid intersymbol interference (ISI) caused by multipath distortion. The discrete symbols are converted to analog and low-pass filtered for RF upconversion. The receiver performs the inverse process of the transmitter. One-tap equalizer is used to correct channel distortion. The tap-coefficients of the filter are calculated based on the channel information. Fig. 6 Example of the power spectral density of the OFDM signal with a guard interval D = TS/4 (number of carriers N=32) [Alard and Lassalle] Fig 4a shows the spectrum of an OFDM subchannel and Fig. 4b and Fig. 6 present composite OFDM spectrum. By carefully selecting the carrier spacing, the OFDM signal spectrum can be made flat and the orthogonality among the subchannels can be guaranteed. The guard interval and its implementation The orthogonality of subchannels in OFDM can be maintained and individual subchannels can be completely separated by the FFT at the receiver when there are no intersymbol interference (ISI) and intercarrier interference (ICI) introduced by transmission channel distortion. In practice these conditions can not be obtained. Since the spectra of an OFDM signal is not strictly band limited (sinc(f) function), linear distortion such as multipath cause each subchannel to spread energy into the adjacent channels and consequently cause ISI. A simple solution is to increase symbol duration or the number of carriers so that distortion becomes insignificant. However, this method may be difficult to implement in terms of carrier stability, Doppler shift, FFT size and latency. Fig. 7 The effect on the timing tolerance of adding a guard interval. With a guard interval included in the signal, the tolerance on timing the samples is considerably more relaxed. Fig. 8 Example of the guard interval. Each symbol is made up of two parts. The whole signal is contained in the active symbol (shown highlighted for the symbol M) The last part of which (shown in bold) is also repeated at the start of the symbol and is called the guard interval One way to prevent ISI is to create a cyclically extended guard interval (Fig. 7, 8), where each OFDM symbol is preceded by a periodic extension of the signal itself. The total symbol duration is Ttotal=Tg+T, where Tg is the guard interval and T is the useful symbol duration. When the guard interval is longer than the channel impulse response (Fig. 3), or the multipath delay, the ISI can be eliminated. However, the ICI, or in-band fading, still exists. The ratio of the guard interval to useful symbol duration is application-dependent. Since the insertion of guard interval will reduce data throughput, Tg is usually less than T/4. The reasons to use a cyclic prefix for the guard interval are: to maintain the receiver carrier synchronization ; some signals instead of a long silence must always be transmitted; cyclic convolution can still be applied between the OFDM signal and the channel response to model the transmission system. http://www.wirelesscommunication.nl/reference/chaptr05/ofdm/ofdmqual.htm Multipath Challenges In an OFDM-based WLAN architecture, as well as many other wireless systems, multipath distortion is a key challenge. This distortion occurs at a receiver when objects in the environment reflect a part of the transmitted signal energy. Figure 2 illustrates one such multipath scenario from a WLAN environment. Figure 2: Multipath reflections, such as those shown here, create ISI problems in OFDM receiver designs. Click here for larger version of Figure 1b Multipath reflected signals arrive at the receiver with different amplitudes, different phases, and different time delays. Depending on the relative phase change between reflected paths, individual frequency components will add constructively and destructively. Consequently, a filter representing the multipath channel shapes the frequency domain of the received signal. In other words, the receiver may see some frequencies in the transmitted signal that are attenuated and others that have a relative gain. In the time domain, the receiver sees multiple copies of the signal with different time delays. The time difference between two paths often means that different symbols will overlap or smear into each other and create inter-symbol interference (ISI). Thus, designers building WLAN architectures must deal with distortion in the demodulator. Recall that OFDM relies on multiple narrowband subcarriers. In multipath environments, the subcarriers located at frequencies attenuated by multipath will be received with lower signal strength. The lower signal strength leads to an increased error rate for the bits transmitted on these weakened subcarriers. Fortunately for most multipath environments, this only affects a small number of subcarriers and therefore only increases the error rate on a portion of the transmitted data stream. Furthermore, the robustness of OFDM in multipath can be dramatically improved with interleaving and error correction coding. Lets look at error correction and interleaving in more detail. Error Correction and Interleaving Error correcting coding builds redundancy into the transmitted data stream. This redundancy allows bits that are in error or even missing to be corrected. The simplest example would be to simply repeat the information bits. This is known as a repetition code and, while the repetition code is simple in structure, more sophisticated forms of redundancy are typically used since they can achieve a higher level of error correction. For OFDM, error correction coding means that a portion of each information bit is carried on a number of subcarriers; thus, if any of these subcarriers has been weakened, the information bit can still arrive intact. Interleaving is the other mechanism used in OFDM system to combat the increased error rate on the weakened subcarriers. Interleaving is a deterministic process that changes the order of transmitted bits. For OFDM systems, this means that bits that were adjacent in time are transmitted on subcarriers that are spaced out in frequency. Thus errors generated on weakened subcarriers are spread out in time, i.e. a few long bursts of errors are converted into many short bursts. Error correcting codes then correct the resulting short bursts of errors. OR for guard interval Handling ISI The time-domain counter part of the multipath is the ISI or smearing of one symbol into the next. OFDM gracefully handles this type of multipath distortion by adding a guard interval to each symbol. This guard interval is typically a cyclic or periodic extension of the basic OFDM symbol. In other words, it looks like the rest of the symbol, but conveys no new information. Since no new information is conveyed, the receiver can ignore the guard interval and still be able to separate and decode the subcarriers. When the guard interval is designed to be longer than any smearing due to the multipath channel, the receiver is able to eliminate ISI distortion by discarding the unneeded guard interval. Hence, ISI is removed with virtually no added receiver complexity. It is important to note that discarding the guard interval does have an impact on the noise performance since it reduces the amount of energy available at the receiver for channel symbol decoding. In addition, it reduces the data rate since no new information is contained in the added guard interval. Thus a good system design will make the guard interval as short as possible while maintaining sufficient multipath protection. Why dont single carrier systems also use a guard interval? Single carrier systems could remove ISI by adding a guard interval between each symbol. However, this has a much more severe impact on the data rate for single carrier systems than it does for OFDM. Since OFDM uses a bundle of narrowband subcarriers, it obtains high data rates with a relatively long symbol period because the frequency width of the subcarrier is inversely proportional to the symbol duration. Consequently, adding a short guard interval has little impact on the data rate. Single carrier systems with bandwidths equivalent to OFDM must use much shorter duration symbols. Hence adding a guard interval equal to the channel smearing has a much greater impact on data rate. http://www.commsdesign.com/design_corner/showArticle.jhtml?articleID=16504605 As we know that cyclic prefix is used to restore the orthogonality and preserve ISI, but the question that arises is that how the orthogonality destroyed between the subcarriers and how cyclic prefix restore the orthogonality. [1] [2] The orthogonality between subcarriers is destroyed due to the channel dispersion whenever the signal is transmitted over a channel and this cause ICI and due to the longer delay ISI occur among the OFDM symbols which are in sequence. [1] Further more there is no any interference in uncorrupted OFDM signal when they are demodulated but when we talk about the time dispersive channel the OFDM subcarriers lost there orthogonality. The main cause behind this is that the demodulator correlation interval for one path will overlap with the symbol boundary of a different path as show in the figure [ ] [ 2] Fig. 4.11 16QAM constellation We will see that this makes equalization in the receiver very simple. If multipath exceeds the CP, then constellation points in the modulation is distorted. As can be seen from Fig. 4.11, when multipath delay exceeds the CP, the subcarriers are not guaranteed to be orthogonal anymore, since modulation points may fall into anywhere in the respective contour. As delay spread gets more severe, the radius of the contour enlarges and crosses the other contours. Hence, this causes error. The CP is utilized in the guard period between successive blocks and constructed by the cyclic extension of the OFDM symbol over a period Ï„ : (4.3) The required criteria is that Ï„ is chosen bigger than channel length Ï„h so as not to experience an ISI. The CP requires more transmit energy and reduces the bit rate to (Nb/NT +Ï„ ), where b is the bits that a subcarrier can transmit. The CP converts a discrete time linear convolution into a discrete time circular convolution. Thus, transmitted data can be modeled as a circular convolution between the channel impulse response and the transmitted data block, which in the frequency domain is a pointwise multiplication of DFT samples. Then received signal becomes Where (4.5) Hence, kth subcarrier now has a channel component Hk, which is the fourier transform of h(t) at the frequency fk. The OFDM symbol is sampled (t = nT and fk = k/NT) in the receiver and demodulated with an FFT. Consequently, the received data has the following form yk = Hk xk, k = 0, . . . ,N −1. (4.6) The received actual data can be retrieved with N parallel one-tap equalizers. One-tap equalizer simply uses the estimated channel ( ˆHk) components and use it to retrieve estimated ˆ xk as follows (4.7) Also note that the spectrum of OFDM decays slowly. This causes spectrum leakage to neighboring bands. Pulse shaping is used to change the spectral shape by either commonly used raised cosine time window or passing through a filter. An OFDM system design considers setting the guard interval (Ï„ ) as well as the symbol time (T) and FFT size with respect to desired bit rate B and given tolerable delay spread. The guard interval is selected according to delay spread, and typically it is 2–4 times the root-mean-squared delay spread with respect to chosen coding and modulation. Symbol time is set with respect to guard time and it is desirable to select much larger than the guard time since the loss in SNR in the guard time is compensated. Symbol time as we know determines the subcarrier spacing ( fb = 1/T). Number of subcarriers N is found with respect to desired bit rate, since total number of bits (bT ) to carry in one symbol is found with B/(T +Ï„ ) and selected coding and modulation determines the number of bits (b) in one subcarrier. Hence, the number of subcarriers is N = bT /b. For instance, b is two for 16QAM with rate 1/2. The required bandwidth (W) is then N âˆâ€" fb. Alternatively, this method is reversed to find out the symbol time starting from the given bandwidth. OR Cyclic-prefix insertion As I m talking about the time dispersive channel I want to include that in time dispersive channel the subcarrier not only have inter symbol interference within them but they also posses interference between them. As we know that in case of time dispersive channel the frequency-selective channel frequency response is equivalent to time dispersion on the radio channel. There are two reasons of orthogonality between OFDM subcarriers. Due to frequency-domain separation. The specific frequency-domain structure of each subcarrier. Even if the frequency-domain channel is constant over a bandwidth corresponding to the main lobe of an OFDM subcarrier and only the subcarrier side lobes are corrupted due to the radio-channel frequency selectivity, the orthogonality between subcarriers will be lost with inter-subcarrier interference as a consequence. Due to the relatively large side lobes of each OFDM subcarrier, already a relatively limited amount of time dispersion or, equivalently, a relatively modest radio-channel frequency selectivity may cause non-negligible interference between subcarriers. Time dispersion and corresponding received-signal timing Figure 9 Time dispersion and corresponding received-signal timing. To deal with this problem and to make an OFDM signal truly insensitive to time dispersion on the radio channel, so-called cyclic-prefix insertion is typically used in case of OFDM transmission. As illustrated in Figure 10, cyclic-prefix insertion implies that the last part of the OFDM symbol is copied and inserted at the beginning of the OFDM symbol. Cyclic-prefix insertion thus increases the length of the OFDM symbol from Tu to Tu +TCP, where TCP is the length of the cyclic prefix, with a corresponding reduction in the OFDM symbol rate as a consequence. As illustrated in the lower part of Figure 10, if the correlation at the receiver side is still only carried out over a time interval Tu =1/∆f , subcarrier orthogonality will then be preserved also in case of a time-dispersive channel, as long as the span of the time dispersion is shorter than the cyclic-prefix length. Cyclic-prefix insertion Figure 10. Cyclic-prefix insertion Cyclic-prefix insertion is beneficial in the sense that it makes an OFDM signal insensitive to time dispersion as long as the span of the time dispersion does not exceed the length of the cyclic prefix. The drawback of cyclic-prefix insertion is that only a fraction Tu /( Tu +TCP) of the received signal power is actually utilized by the OFDM demodulator, implying a corresponding power loss in the demodulation. In addition to this power loss, cyclic-prefix insertion also implies a corresponding loss in terms of bandwidth as the OFDM symbol rate is reduced without a corresponding reduction in the overall signal bandwidth. One way to reduce the relative overhead due to cyclic-prefix insertion is to reduce the subcarrier spacing ∆f , with a corresponding increase in the symbol time Tu as a consequence. http://wirelesscafe.wordpress.com/2009/04/20/ofdm-as-downlink-transmission-scheme-for-lte/

Beowulf vs. Gilgamesh as Epic Heroes Essay -- Epic Hero

Clack! Bang! Swish! Auuuuugh! This is the sound of clanging armor, flying spears, and slicing swords. The sound of men howling in agony as their limbs are severed from a blood thirsty blow of the enemies sword can be heard from the four corners of the earth. This can only be described as the sound of great battle. Battle was a very important part of a man’s life back during the seventh and eighth centuries. Every battle has a man who stands out at the forefront and shines above the rest. During these two time periods there stood two great men: Gilgamesh, the selfish, lustful king, and Beowulf the proud and boastful warrior. These two men, both powerful and well-respected, embody the true essence of what it means to be an epic hero. Gilgamesh’s lifestyle and rash decisions make him the perfect candidate for a life lesson by the gods. Beowulf and his boastful nature ultimately lead him to be great in life and to later fall. Finally, the two epic heroes both share some of the same good and bad qualities, thus, making each one slight mirror images of one another. According to Webster's, an epic hero is â€Å"a larger than life figure from a history or legend, usually favored by or even partially descended from deities, but aligned more closely with mortal figures in popular portrayals†. The hero participates in a cyclical journey or quest, faces adversaries that try to defeat him in his journey, gathers allies along his journey, and returns home significantly transformed by his journey. The epic hero illustrates traits, performs deeds, and exemplifies certain morals that are valued by the society from which the epic originates. They usually embody cultural and religious beliefs of the people. Many epic heroes are recurring characters in ... ...rs. In conclusion, Beowulf and Gilgamesh totally exemplify what is truly means to be a tragic hero. The two men’s lifestyles ultimately determined how their destiny would lay out. Every epic hero is the same no matter where they come from. Their proud demeanor, superhuman abilities, and treacherous journeys qualify them as special individuals because no ordinary could ever possibly do all that they do. Even though every epic hero possesses a tragic flaw that ultimately leads to their downfall, they always seem to get some good done before they leave the earth and fade into the afterlife. They are always themselves no matter what any opposition may think. No matter the circumstances they believe in the glitz and glory of battle and they always die with their name going on for ages and ages, thus, making these two the epitome of what it means to be a true epic hero.

Rights and Responsibilities

When I think of America, I think of freedom and citizenship. The right to vote, or the right to freely speak are things that we, as citizens, posses. We as citizens have rights, and then we have responsibilites. Citizens are expected to know and understand the rules that the government has presented to us, and abide by these rules for our freedom. In 1791, the Constitution of the United States was amended and we were given the ten amendments, which is also known as the Bill of Rights, to protect our freedoms. The Bill of Rights is a list of the rights citizens have and value. The purpose of the bill is to protext against any infringement from the government, so the citizens can live in a free nation and have control over their communities and lives. As citizens we should know what the government is doing and to voice your opinion when we feel strongly about something the government has done or has failed to do. Being informed also means knowing your rights and exercising them when you feel it is necessary. Voting is one of your most important responsibilities as a citizen. By doing so you exercise your right of self-government. When you vote you are choosing the people that are going to run our government. Taking the responsibility to vote ensures that leadership is changed in an orderly manner. Another responsibility we as Americans have is to participate in the community and govrnment, if we had no one to run our country it would be pretty caotic, and if no one would ever speak out, no problems in the community would get solved. If we have people involved in the community its more likely to be well run. To enjoy your rights to the fullest, you must be prepared to respect other people's rights as well. For example, as a hairdresser, you are taught to only ask certain questions so that way you don't offend anyone. Of if you live in an area with a lot of neighbors, be respectful and keep the volume on your television down, or on your stereo. You should expect they would do the same for you. Also you have the responsibility to show respect to the public, and the publics property. For example, a lot of kids write on the picnic tables at the beach, and that is vandalism, they have yet to be caught so they haven't learned but thats disrespectful to the other people that come to sit there and eat. Especially when they write or draw innapropriate things.

Effective Management Essay

An effective manager accepts the political nature of organizations. Power tactics are used to translate power bases into specific action, and there are a number of tactics that could be used in various situations. As a manager trying to influence your employees, what tactics would you personally be most likely to use? Why? It is often necessary to have political influence to enable organizational members to achieve their goals, especially if these goals involve some degree of change or innovation. Network is defined by Richard L.  Daft as, â€Å"a system that links together people and departments within or among an organizations for the purpose of sharing information resources. † But, a more common and more subtle form of political behavior involves networking. Networking is when an individual establishes good relations with key organization members and/or key people outside the organization in order to accomplish one’s goals. Something as seemingly trivial as the arrangement of furniture in an office can affect perceptions of another person’s power. One vivid example comes from John Ehrlichman’s book Witness to Power. Ehrlichman described his first visit to J. Edgar Hoover’s office at the Department of Justice. The legendary director of the FBI had long been one of the most powerful men in Washington, DC, and as Ehrlichman’s impressions reveal, Hoover used every opportunity to reinforce that image. Ehrlichman was first led through double doors into a room replete with plaques, citations, trophies, medals, and certificates jamming every wall. He was then led through a second similarly decorated room into a third trophy room, and finally to a large but bare desk backed by several flags and still no J. Edgar Hoover. The guide opened a door behind the desk, and Ehrlichman went into a smaller office, which Hoover dominated from an impressive chair and desk that stood on a dais about six inches high. Erhlichman was instructed to take a seat on a lower couch, and Hoover peered down on Ehrlichman from his own loftier and intimidating place.