5 Ways to Be More Likeable

5 Ways to Be More Likeable 5 Ways to Be More Likeable 5 Ways to Be More Likeable The topic of this piece may create some frustration for advocates of self-love and self-acceptance. Doesn’t the idea of trying to be liked sound like it flies in the face of those who would suggest that there is no need to make an effort to be liked? That being who you are is enough and that we shouldn’t try to be more likeable? My question is why can’t it be both/and? Hear me out. What does it mean to be likeable? Being liked and being likeable are all about being authentic. When you are true to who you are, you come across as genuine. Being genuine makes people want to be around you. You become an example to live by, and you inspire others to be true to themselves as well. Ultimately, self-love and acceptance go hand-in-hand with being likeable, and I would suggest that it is difficult to have one without the other. As humans we value connection with others. We are a community oriented species and we naturally look for those who we find attractive to be in our group. A strong indication of whether someone will be ‘liked’ is how well they know and are at ease with who they are. Look, even science says so. It is likely that the idea of being liked or likeable appeals to you as a college student. You are in a position where you will be networking with many different individuals from diverse communities. You may feel that it is important to put your best foot forward in an effort to be attractive and loved. The first step in the process is to begin with an effort at loving yourself. When you enjoy who you are, your confidence radiates out to others, making them, in turn, more comfortable with themselves. You can be genuine, while also making an effort to do some inner work and reflect on how you may be perceived by others. This requires being conscious and aware of how your actions impact other people. The following is a list of ideas to consider when you are actively working on personal development in regards to your interactions with others. If you hope to be more likeable, first think about how to get to the root of who you truly are, and then let your personality shine through from there. Use the following ideas to enhance the personality traits you likely already have. Cultivate a Habit of Deep Listening People enjoy telling their story. If you’re hoping to enhance your likeability try to cultivate a habit of listening to people on a deeper level. If they are telling a story about their day, really listen to them. This means putting down your phone and focussing in on what they are telling you. Make just enough eye contact so they feel that you are being attentive to them. Pick up on specific problems or parts of the story they are telling and ask a question about it. Share some thoughts from your own experience, but make certain that the chat is a two-way exchange. Listening is one of the fundamental components of communication, and it is particularly important when we are constantly bombarded with distractions and interruptions. Be a more likeable and genuine person by actively participating in the act of listening. People will appreciate being listened to and they will offer the same to you when it is your turn to speak. For more on the practice of deep listening, check out this blog by Mindful Magazine. Be Thoughtful with Your Language This second tip ties in with the first. Speaking and listening are fundamental to proper communication. Though this seems obvious, we often forget that our words have an impact on people. Perhaps this is due to the individualistic nature of our society wherein people feel that they have the right to express their opinion even to the detriment of others. Although I do not discount the importance of individualism and speaking your mind, it is also important to be mindful of the language and thoughts you express. Our actions and the words we choose to use speak to our inner nature. If we are focussed on belittling people and speaking negatively, people may develop a less-than-favourable opinion about us. If we choose to speak with kindness and use language that is appropriate, we may be perceived as more approachable. Speaking in a friendly tone and maintaining an open demeanor can also make us seem amiable. Being mindful about how we listen and speak is a first step in becoming more likable. Be Open-Minded People love to have their opinions heard. Likable people are perceived as more personable because they tend to be open-minded when talking to people. They are open and willing to engage with a variety of people, regardless of their background or experience. They listen without judgement and avoid the tendency towards preconceived ideas about other people. They have their own opinions and they may not agree with another person’s point of view, but they are willing to take the time to listen and make an attempt to understand. In order to develop this skill, practice active listening. Attempt to cultivate a stance of true curiosity whenever you meet someone whose perspective differs from yours. Ask questions and allow the individual to offer their thoughts and ideas while also sharing your own feelings. You will find that participating in this kind of communication pattern will open up the doors to deeper dialogue. Be Balanced Now, certainly being balanced is not always a possibility. We all have off days where we are not feeling our best. However, if being grumpy tends to be the norm for you, you may want to begin looking at making some changes in your life. Usually a persistent gloomy mood means that there are some underlying causes of unhappiness. Short of an underlying personal issue, make sure to maintain a consistently balanced and reliable personality when engaging with people. When people’s moods fluctuate greatly or are perceived as unpredictable, this tends to affect their likability. If you are deemed unpredictable in social settings, people may even actively avoid you. When entering a social situation, make certain that you are feeling grounded and level-headed, this way people will perceive you as reliable and balanced. If you are having a bad day, remember that you do not have to say everything that comes to your mind. Sometimes it is best to keep your thoughts to yourself, smile, and nod. Get on the Same Wavelength It may come as a surprise, but in social engagements we love when people mirror our actions. In other words we have a tendency to mirror those who are around us. Think about it, if someone smiles at you, what is your reaction. Do you smile back? This is a natural reaction that begins in infancy, we learn to mimic the facial reactions of others as we learn how to engage in social interaction. Mirroring or social synchronization is an essential component of developing social ties. By syncing up with those around us we are building rapport. If we take the time to actively develop this skill, it can be a powerful way of building connection with other people. When we learn to sync up with others while maintaining our own sense of self, it facilitates feelings of empathy and it may make the other individual feel as though you are on the same wavelength as them. Practice Being Social We are social beings. We love to be heard and we love to communicate with each other. That does not mean it is always easy. As a new college or university student you may hope to hone your skills in the communication department as a strategic way to make connections and begin to network with others. You never know who may be your future boss or employee. Taking some of the above techniques into consideration as you navigate your university career may help you to connect with others while maintaining a link to your authentic self. Social engagement is just one way to boost your credibility in the academic sphere. Focussing on academics is certainly a primary aim for students. Should you need help navigating any of the challenges university and college have to offer, please check out our services. We at Homework Help Global are always available to make your life go a little more smoothly. 5 Ways to Be More Likeable 5 Ways to Be More Likeable 5 Ways to Be More Likeable The topic of this piece may create some frustration for advocates of self-love and self-acceptance. Doesn’t the idea of trying to be liked sound like it flies in the face of those who would suggest that there is no need to make an effort to be liked? That being who you are is enough and that we shouldn’t try to be more likeable? My question is why can’t it be both/and? Hear me out. What does it mean to be likeable? Being liked and being likeable are all about being authentic. When you are true to who you are, you come across as genuine. Being genuine makes people want to be around you. You become an example to live by, and you inspire others to be true to themselves as well. Ultimately, self-love and acceptance go hand-in-hand with being likeable, and I would suggest that it is difficult to have one without the other. As humans we value connection with others. We are a community oriented species and we naturally look for those who we find attractive to be in our group. A strong indication of whether someone will be ‘liked’ is how well they know and are at ease with who they are. Look, even science says so. It is likely that the idea of being liked or likeable appeals to you as a college student. You are in a position where you will be networking with many different individuals from diverse communities. You may feel that it is important to put your best foot forward in an effort to be attractive and loved. The first step in the process is to begin with an effort at loving yourself. When you enjoy who you are, your confidence radiates out to others, making them, in turn, more comfortable with themselves. You can be genuine, while also making an effort to do some inner work and reflect on how you may be perceived by others. This requires being conscious and aware of how your actions impact other people. The following is a list of ideas to consider when you are actively working on personal development in regards to your interactions with others. If you hope to be more likeable, first think about how to get to the root of who you truly are, and then let your personality shine through from there. Use the following ideas to enhance the personality traits you likely already have. Cultivate a Habit of Deep Listening People enjoy telling their story. If you’re hoping to enhance your likeability try to cultivate a habit of listening to people on a deeper level. If they are telling a story about their day, really listen to them. This means putting down your phone and focussing in on what they are telling you. Make just enough eye contact so they feel that you are being attentive to them. Pick up on specific problems or parts of the story they are telling and ask a question about it. Share some thoughts from your own experience, but make certain that the chat is a two-way exchange. Listening is one of the fundamental components of communication, and it is particularly important when we are constantly bombarded with distractions and interruptions. Be a more likeable and genuine person by actively participating in the act of listening. People will appreciate being listened to and they will offer the same to you when it is your turn to speak. For more on the practice of deep listening, check out this blog by Mindful Magazine. Be Thoughtful with Your Language This second tip ties in with the first. Speaking and listening are fundamental to proper communication. Though this seems obvious, we often forget that our words have an impact on people. Perhaps this is due to the individualistic nature of our society wherein people feel that they have the right to express their opinion even to the detriment of others. Although I do not discount the importance of individualism and speaking your mind, it is also important to be mindful of the language and thoughts you express. Our actions and the words we choose to use speak to our inner nature. If we are focussed on belittling people and speaking negatively, people may develop a less-than-favourable opinion about us. If we choose to speak with kindness and use language that is appropriate, we may be perceived as more approachable. Speaking in a friendly tone and maintaining an open demeanor can also make us seem amiable. Being mindful about how we listen and speak is a first step in becoming more likable. Be Open-Minded People love to have their opinions heard. Likable people are perceived as more personable because they tend to be open-minded when talking to people. They are open and willing to engage with a variety of people, regardless of their background or experience. They listen without judgement and avoid the tendency towards preconceived ideas about other people. They have their own opinions and they may not agree with another person’s point of view, but they are willing to take the time to listen and make an attempt to understand. In order to develop this skill, practice active listening. Attempt to cultivate a stance of true curiosity whenever you meet someone whose perspective differs from yours. Ask questions and allow the individual to offer their thoughts and ideas while also sharing your own feelings. You will find that participating in this kind of communication pattern will open up the doors to deeper dialogue. Be Balanced Now, certainly being balanced is not always a possibility. We all have off days where we are not feeling our best. However, if being grumpy tends to be the norm for you, you may want to begin looking at making some changes in your life. Usually a persistent gloomy mood means that there are some underlying causes of unhappiness. Short of an underlying personal issue, make sure to maintain a consistently balanced and reliable personality when engaging with people. When people’s moods fluctuate greatly or are perceived as unpredictable, this tends to affect their likability. If you are deemed unpredictable in social settings, people may even actively avoid you. When entering a social situation, make certain that you are feeling grounded and level-headed, this way people will perceive you as reliable and balanced. If you are having a bad day, remember that you do not have to say everything that comes to your mind. Sometimes it is best to keep your thoughts to yourself, smile, and nod. Get on the Same Wavelength It may come as a surprise, but in social engagements we love when people mirror our actions. In other words we have a tendency to mirror those who are around us. Think about it, if someone smiles at you, what is your reaction. Do you smile back? This is a natural reaction that begins in infancy, we learn to mimic the facial reactions of others as we learn how to engage in social interaction. Mirroring or social synchronization is an essential component of developing social ties. By syncing up with those around us we are building rapport. If we take the time to actively develop this skill, it can be a powerful way of building connection with other people. When we learn to sync up with others while maintaining our own sense of self, it facilitates feelings of empathy and it may make the other individual feel as though you are on the same wavelength as them. Practice Being Social We are social beings. We love to be heard and we love to communicate with each other. That does not mean it is always easy. As a new college or university student you may hope to hone your skills in the communication department as a strategic way to make connections and begin to network with others. You never know who may be your future boss or employee. Taking some of the above techniques into consideration as you navigate your university career may help you to connect with others while maintaining a link to your authentic self. Social engagement is just one way to boost your credibility in the academic sphere. Focussing on academics is certainly a primary aim for students. Should you need help navigating any of the challenges university and college have to offer, please check out our services. We at Homework Help Global are always available to make your life go a little more smoothly.

Studying The Bankruptcy Of Orange County Finance Essay - Free Essay Example

The case of bankruptcy of Orange County in 1994 emphasize the importance of using duration and Value at risk (VAR) to assess portfolio risk and avoid future bankruptcy. Duration and VAR analysis provide deeper understanding about the underlying risk of the Orange County Investment Pool which was heavily leveraged and interest-pledged through reverse repurchase agreements and other derivatives in the pool. Some VAR estimation, including historical simulation method, delta-normal method and Monte Carlo simulation will be used to calculate worst possible loss. The EWMA will be used to provide more accurate estimation of the volatility to improve the accuracy of VAR estimation. Background: On Dec 6, 1994, Orange County declared bankruptcy after suffering losses of around $1.6billion from a wrong way bet on interest rates 7.5 billion investment pool. This pool was intended to gain some returns from the investing the money which is raised from taxes and other government incomes. It was implemented a bet that the interest would decline or stay low by Citron (the portfolio manager). Because of the steadily declining interest rates from 1989 to 1992, the portfolio performed extremely well before 1994 and earned millions of above average profit. However, in 1994, the government suddenly declared policies which included raise the interest rates from 3.45% to 7.14% to prevent high inflation and overheating economy. This increase in interest rate caused the portfolio suffer 1.6 billion loss and further lead the bankruptcy of Orange County. Section 1: The heavy leveraged and interest-pledged portfolio In order to sustain above average returns, several investment tools are used by Citron to leverage the $7.5 billion funds into $20.5billion investment. In detail, reverse repurchase agreements allow Citron to use the securities which had already purchased as collateral on further borrowing and then reinvested the cash into new securities (Jameson, 2001). Besides the heavily leveraged risk, the portfolio also encounters significant risk from the unexpected interest movement. Firstly, these repurchase agreements values significantly depend on the change in interest rate. In detail, its value decrease as the interest rate increase and increase as the interest rate decrease (P=). Secondly, $2.8 billion of derivatives, including inverse floating-rate notes, dual index notes, floating-rate notes, index-amortizing notes and collateralized mortgage obligations, are used to increase the portfolio bet on the term structure of the interest rate (Jorion, 2009). Thirdly, median term maturities which had higher yields (5.2%) than the short term investments (3%) were used to increase the return of the portfolio (Jorion, 2009). However, by using longer term maturities, the portfolios sensitivity to interest change will significantly increase. Clearly, by doing these, the portfolios value will be significantly impacted by the movement of the interest. Section 2: Duration of the portfolio and its application Duration of the portfolio Hull (2009) defines the duration as a measure of how long, on average, the holder of the instrument has to wait before receiving cash payments. It measures sensitivity of price changes with changes in interest rates. Duration can be calculated by weighting average (the weight is the proportion of portfolios total present value of cash flow received at time t) of the times. In this case, the portfolio was heavily bet on the interest, therefore, duration might be a good measure for the portfolio. In the $7.5 billion portfolio, median term maturities (5 years), rather than short term maturities (1-3 years), were used to increase the return. By doing this, the duration of the portfolio significant increased. In other words, the portfolio exposed higher risk of interest rate movements. In December 1994, the average duration of the securities in the portfolio was 2.74 years. It means 1% change in interest would cause 2.74% change in portfolios prices. M oreover, Citron leveraged $7.5 billion equity into a $20.5 billion portfolio. This means that a 2.73 leverage ratio (20.5/7.5). In other words, for every dollar of the pool invested, the pool borrowed extra $1.73. For a leveraged portfolio, the effective portfolio duration = ordinary duration * leverage ratio. Thus, the effective portfolio duration of the portfolio is 7.4 (2.74*2.7). Estimation by using duration The response of portfolio prices to change in interest rate: In 1994, the interest rates went up by about 3.5 ( and the 5 years bond yield was 5%, therefore, the loss of the portfolio equals 1.85 (7.5*7.4*3.5%/1.05) which is slightly larger than the actual loss of 1.64 billion. This slightly difference between the loss estimated by duration and the actual loss might be caused by that the duration applies to only small changes in interest rate. As a first order approximation, duration cannot capture the information that two bonds with same duration can have different change in price for large change in interest rate (different convexity). So, convexity (second order approximation) which can capture this information should be added into the estimating model. Through adding this (convexity factor), the estimated loss will slightly less than before, and will more close to the actual loss (1.64 billion). Thus, duration seems to have the ability to accurate measure the portfolios sensitivity to interest rate change. Section 3: Value at risk (VAR) Value at risk (VAR) In order to estimate the underlying risk of the portfolio, VAR which measures the worst expected loss over a given horizon under normal market conditions at a given confidence level could be used (Jorion, 2001). Because the portfolio was heavily bet on the interest rate, its return and risk are significantly depending on the change of interest rate. In other words, the change of interest yield multiplies the modified duration and portfolio value could be used as an approximation of the change of portfolios value. Thus, the change of interest yield could be used in the 3 simulation methods as the only factor that contribute the change of portfolio value. Non-parametric approach (no need to identify variance-covariance matrix) Historical simulation approach The historical simulation accounts for non-linearity, income payments, and even time decay effects through using marking-to-market the whole portfolio over a large number of realizations of underlyi ng random variables. VAR is calculated from the percentiles of the full distribution of payoffs (Jorion, 2001). By using actual price, the method captures Greek risk (gamma, vega risk etc.) and corrections of securities (already exist in the real historical data) in the portfolio, and it does not rely on some specific assumption, such as the underlying stochastic structure of the market (the pre-requests of estimating volatility and mean). Moreover, it can account for fat tails distribution besides normal distributions (Jorion, 2001). (Figure 1) The root-T approach will be used to transfer the monthly VAR to yearly VAR in all the 3 approaches. Its success significantly relies on the some specific assumptions, including the monthly yield changes of the portfolio are identically and independently distributed (iid distribution) and the return has a constant variance (Cuthbertson and Nitzsche, 2001). However, in the real world, stock returns always has time varying variance and th ere are some autocorrelation factors exist (thus, not independent). Therefore, as the T increase, the error of the transformation will significantly increase. The VAR will be calculated through sorting the monthly yield change and picking the worst daily yield change at 5% percentile (see details in CD). However, in this case, the increase in yield will cause decrease in portfolio return, therefore, the worst daily yield change should be picked at the right hand side of the histogram (see figure 1). The VAR equals 1.24 billion annually (0.36 billion monthly) which is less than the actual loss (1.64 billion). This inaccuracy might be caused by the problems exist in historical simulation method. Firstly, the success of the method significantly relies on the assumption that the past price can represent the future price information. However, the assumption is not realistic to some extent because of the existence of market efficient. Secondly, simple historical simulation method may m iss the information of temporarily elevated volatility, such as structural breaks and extreme value (Butler and Schachter, 1996). In this case, the historical simulation method cannot capture the extreme value (1.64 billion loss) which is caused by 6 suddenly decreases of interest rate. Parametric approach (need to need to identify variance-covariance matrix) Delta normal approach The delta normal method is particularly simple approach to implement. It takes account simple variance-covariance matrix and then forecast the total variance of the portfolio (volatility). Then, The VAR can be calculated through the formula: VAR = MD*Portfolio Value*=7.4*7.5*0.4%*1.65/(1.005)=0.35 billion (monthly) = 1.21 billion (annually). Delta normal method is slightly less accurate than the historical in the case. This might caused by that the change in yield does is a fat tail distribution (Kurtosis =6.9, Skewness = -0.44) rather than a normal distribution (Kurtosis =6.9, Skewness = -0.44 ). Thus, the model based on the normal distribution will underestimate the proportion of outliers and hence the value at risk (Jorion, 2001). In addition, the portfolio contains a lot of derivatives instrument. This will cause the method inadequately measures the risk of nonlinearity. Monte Carlo simulation (MCS) (the theoretical most powerful method) Unlike historical simulation, through specifying and stimulating a stochastic process for financial variables, Monte Carlo simulation covers a wide range of financial variables (volatility and stochastic variables) and fully captures correlations of securities (unlike HS, need to define the matrix) in the portfolio (Jorion, 2001). It does not only account for a wide range of risks, such as nonlinear price, volatility and model risks (the same as historical simulation), but also incorporate time variation of volatility (structural breaks and extreme values), and fat tails. Moreover, it can capture the structure changes in the port folio as the time pass (Jorion, 2001). In theoretical way, MCS should be the best method in estimating VAR. The MCS VAR is about 0.295 monthly, through using the root-T rule, the annually VAR is about 1 billion (see detail calculation in CD). There are also some limitations of Monte Carlo simulation cause the estimated error between the estimated loss and actual loss. Its success significantly relies on the specific pricing model for underlying assets and stochastic processes for the underlying risk factors. In this case, the pricing formula is Brownian approach without drift may not accurately capture the actual value change of the portfolio. This might be one possible reason that the estimated loss is not equal to the actual loss. Moreover, the problems may exist in the sample used to derivate the underlying risk factors. For example, MCS will generate less accurate estimates then delta normal method when the risk factors are jointly normal and all payoffs are liner (Cuthbertso n and Nitzsche, 2001). Why MCS (theoretical best method) shows the worst estimation in this case MCS seems to have the least accurate estimation (more closer to the actual loss) in this case. This might be caused by the portfolio used in MCS are treated as one asset which is only impacted by the interest yield. Three factors, including the correlation between all the securities in the portfolio, the underlying risk factors of these securities and the different price formula should be used for each security, are ignored in the powerful approach (Tardivo, 2002). On the other hand, compared with the MCS, historical simulation does not need to define the correlation matrix, because the data has already captured the information. In addition, underlying risk factors also contains in the actual data. Thus, in the case with limited information, historical simulation provides more accurate estimation. Section 4: EWMA In realistic world, the variance of the time series is varying overtime. Thus, the simple unconditional variance (simple variance/standard deviation) may not provide unbiased estimation of the volatility. This will further result in inaccuracy estimation of the VAR. in the case, In the case, the simple variance (volatility) are calculating through assigning the same weight on all observations during Jan 1953 and Dec 1994. This may lead to biased forecasts of VAR because the Fed dramatically increased/decreased the interest rate during this time period. In order to improve the accuracy of estimating VAR, Exponentially weighted moving average (EWMA) will be used to provide more accurate estimation to the volatility at a specific time (conditional standard deviation) (Cuthbertson and Nitzsche, 2001). EWMA method allows more recent observations to have stronger impact on the forecast of volatility than the old observations. In practical way, the recent data are given more weights th an the old data. By applying this model, volatility in practice will be more impacted by recent events and the impacts on volatility will decline as time pass (smaller weights apple to the event) (Brooks, 2002). Through applying the EWMA model, the monthly standard deviation for the six months before December 1994 is 0.348%. The next 6 months volatility could be forecasted through using the formula:. In addition, the actual monthly volatility could use the change in yield as approximation. According to RiskMetrics, the optimalshould be 0.97 (Brock, 2002). ÃÆ' £Ãƒ ¢Ã¢â‚¬Å¡Ã‚ ¬Ãƒ ¢Ã¢â‚¬Å¡Ã‚ ¬ Forecast volatility (%) Actual volatility (%) Range of the possible volatility at 5% confidence level ÃÆ' £Ãƒ ¢Ã¢â‚¬Å¡Ã‚ ¬Ãƒ ¢Ã¢â‚¬Å¡Ã‚ ¬ Volatility at june 1994 0.35 ÃÆ' £Ãƒ ¢Ã¢â‚¬Å¡Ã‚ ¬Ãƒ ¢Ã¢â‚¬Å¡Ã‚ ¬ Left side (-1.65) Right side (1.65) Forecasted volatility ÃÆ' £Ãƒ ¢Ã¢â‚¬Å¡Ã‚ ¬Ãƒ ¢Ã¢â‚¬Å¡Ã‚ ¬ ÃÆ' £Ãƒ ¢Ã¢â‚¬Å¡Ã‚ ¬Ãƒ ¢Ã¢â‚¬Å¡Ã‚ ¬ ÃÆ' £Ãƒ ¢Ã¢â‚¬Å¡Ã‚ ¬Ãƒ ¢Ã¢â‚¬Å¡Ã‚ ¬ ÃÆ' £Ãƒ ¢Ã¢â‚¬Å¡Ã‚ ¬Ãƒ ¢Ã¢â‚¬Å¡Ã‚ ¬ Jul-94 0.35 -0.26 -0.57 0.57 Aug-94 0.34 0.08 -0.56 0.56 Sep-94 0.35 0.47 -0.57 0.57 Oct-94 0.34 0.20 -0.56 0.56 Nov-94 0.34 0.31 -0.56 0.56 Dec-94 0.34 0.04 -0.55 0.55 Generally, the EWMA approach does not fully capture abnormal volatility change in 1994. In detail, the actual volatility change more volatile than the forecast one (table 1). The inaccuracy involve in estimating the volatility may result in that the calculated VAR is significantly different from the actual possible loss of the portfolio (table 2). If the forecast volatility is used to calculate VAR, manager should aware that the calculated VAR is only an approximation and it cannot capture all the volatility change information. For example, in this case, the actual volatility in Sep-94 is significantly larger than the forecast one. This may cause manager to underestimate the risk in the time period and then holding the portfolio unchanged as before. It is also support by Mahoney (1996) who empirically support that the EWMA volatility has inaccuracy problems. Table 1: ÃÆ' £Ãƒ ¢Ã¢â‚¬Å¡Ã‚ ¬Ãƒ ¢Ã¢â‚¬Å¡Ã‚ ¬ Forecast volatility (%) Actual volatility (%) Left side (-1.65) Right side (1.65) Volatility at June 1994 0.35 ÃÆ' £Ãƒ ¢Ã¢â‚¬Å¡Ã‚ ¬Ãƒ ¢Ã¢â‚¬Å¡Ã‚ ¬ ÃÆ' £Ãƒ ¢Ã¢â‚¬Å¡Ã‚ ¬Ãƒ ¢Ã¢â‚¬Å¡Ã‚ ¬ Forecasted volatility ÃÆ' £Ãƒ ¢Ã¢â‚¬Å¡Ã‚ ¬Ãƒ ¢Ã¢â‚¬Å¡Ã‚ ¬ ÃÆ' £Ãƒ ¢Ã¢â‚¬Å¡Ã‚ ¬Ãƒ ¢Ã¢â‚¬Å¡Ã‚ ¬ ÃÆ' £Ãƒ ¢Ã¢â‚¬Å¡Ã‚ ¬Ãƒ ¢Ã¢â‚¬Å¡Ã‚ ¬ ÃÆ' £Ãƒ ¢Ã¢â‚¬Å¡Ã‚ ¬Ãƒ ¢Ã¢â‚¬Å¡Ã‚ ¬ Jul-94 0.35 -0.26 -0.57 0.57 Aug-94 0.34 0.08 -0.56 0.56 Sep-94 0.35 0.47 -0.57 0.57 Oct-94 0.34 0.20 -0.56 0.56 Nov-94 0.34 0.31 -0.56 0.56 Dec-94 0.34 0.04 -0.55 0.55 On the other hand, VAR calculated based on EWMA volatility can still be used as a benchmark to assess the portfolios risk. All of the actual volatility is in the boundary of the forecast volatilitys 5% tail cut off (on both sides *1.65). That is to say, although there are significant differences between the forecast and the actual volatility in this case, portfolio manager may still not underestimate the underlying risk at 5% confidence level (normal distribution). In addition, if better models are used, including GARCH, EGARCH, and GJR , the VAR can provide more precise estimation of the worst possible loss. Table 2: ÃÆ' £Ãƒ ¢Ã¢â‚¬Å¡Ã‚ ¬Ãƒ ¢Ã¢â‚¬Å¡Ã‚ ¬ Forecasted VAR(*-1.65) monthly Actual VAR monthly Forecasted VAR annually Actual VAR annually Jul-94 -0.302 0.227 -1.045 0.786 Aug-94 -0.297 -0.070 -1.030 -0.242 Sep-94 -0.301 -0.410 -1.044 -1.420 Oct-94 -0.298 -0.174 -1.034 -0.604 Nov-94 -0.298 -0.270 -1.031 -0.937 Dec-94 -0.293 -0.035 -1.015 -0.121 Section 5: Backtest EWMA model In order to test whether VAR can be used as s a benchmark to assess the portfolios risk, the backtest should be used to test whether EWMA can capture the actual change in interest yield at the 5% left tail cut off level (normal distribution). Practically, if all of the actual changes in interest yield are within the forecast volatilities boundary (the forecast volatility multiply 1.65 at right hand side and -1.65 at the left hand side), the EWMA model can be considered as providing accurate estimation at 5% confidence level. According to figure 2, there are 4 outliers (Aug-89, Jan-92, Feb-94 and Mar-94) are outside the forecast. This will cause manager to over/under estimate the underlying risk of the portfolio. Figure 2: forecast volatilities boundary and actual change in interest yield Section 6: Whether the portfolio should be liquidated in December 1994 Miller and Ross (1997) recommend that the portfolio should not be liquidated until the maturity of the structural notes. This is because after the Orange County bankruptcy, the interest rate fell from 7.8% to 5.25% during Dec 1994 to Dec 1995. If it did not announce the bankruptcy, this decrease in interest rate could help the County to recover 7.4*7.5*2.55%/1.05= 1.32 billion losses. However, the problem is that in Dec 1994, how the managers would know that there would be a decrease in interest in 1995. Jorion (1997) suggest that because it is impossible to predict suddenly interest rate decrease, holding the assets in order to recover value in the next years is speculative and risky. Given this change in yield is a normal distribution, the probability of 2.55% decrease in interest can be calculated through P(=P(-6.223). According to the normal statics table, the probability of such large decrease in interest is less than 1%. Thus, the rational managers would not expect suddenl y large decrease in interest rate. In order to minimize to further loss, it is reasonable to liquidate the portfolio on Dec 1994. In addition, as the portfolio is interest pledged, some interest futures, such as the T-bond futures, could be shorted to hedge the portfolio in Dec 1993. Long cap could also a good choice to generate profit when interest rate exceeds the strike rate. This could partially compensate the massive loss. Conclusion The orange countys heavy leveraged and interest-pledged portfolio suffer massive loss in 1994 because of the suddenly increase of interest rate. Through examining this case study, the Duration and VAR are important measurement of risk to avoid future bankruptcy. Compare the duration estimated loss with the actual loss, Duration (plus convexity) of the portfolio seems to have the ability to accurately measure the portfolios sensitivity to the change in interest rate. In addition, all of the VARs calculated through three approaches, including historical simulation, delta normal, and MCS, are less than the actual loss. The theoretical best approaches (MCS) does not provide the most accurate estimation because of ignorance of some important factors, such as the correlation between all the securities in the portfolio, the underlying risk factors of these securities and the different price formula should be used for each security. The backtest of EWMA (4 outliers) suggest that there are some risk in using VAR to measure the worst possible loss in the real world.

Good Editors Notice the Details and the Big Picture

Its often said that the brains of human beings have two very distinct sides, with the left side being responsible for language, logic, and math, while the right handles spatial abilities, face recognition and processing music. Editing is also very much a two-sided process, one that we divvy up as micro- and macro-editing. Micro-editing deals with the technical, nuts-and-bolts aspects of news writing. Macro-editing deals with the content of stories. Heres a checklist of micro- and macro-editing: Micro-Editing †¢ AP Style †¢ Grammar †¢ Punctuation †¢ Spelling †¢ Capitalization Macro-Editing †¢ The lede: Does it make sense, is it supported by the rest of the story, is it in the first graf? †¢ The story: Is it fair, balanced and objective? †¢ Libel: Are there any statements that might be considered libelous? †¢ Substance: Is the story thorough and complete? Are there any holes in the story? †¢ Writing: Is the story well-written? Is it clear and understandable? Personality Type and Editing As you can imagine, certain personality types are probably better at one type of editing or the other. Precise, detail-oriented people are probably best at micro-editing, while big-picture types probably excel at macro-editing. Small Details Versus Content And in a typical newsroom, especially at larger news outlets, there is a kind of micro-macro division of labor. Copy desk editors generally focus on the small details - grammar, AP Style, punctuation and so on. Assignment editors who run the various sections of a paper - city news, sports, arts and entertainment and so on - generally focus more on the macro side of things, the content of stories. But heres the rub - a good editor has to be able to do both micro- and macro-editing, and to do both well. This is especially true at smaller publications and student newspapers, which typically have fewer staffers. Focusing on Small Details May Lose the Big Picture In other words, you must have the patience to correct bad grammar, misspelled words and punctuation problems. But you cant let yourself get so caught up in the small details that you lose sight of the big picture. For example, does the lede of the story make sense? Is the content well-written and objective? Does it cover all the bases and answer all the questions a reader would likely have? Both Are Equally Important The larger point is this—both micro- and macro-editing are equally important. You can have the most wonderfully written story in the world, but if its filled with AP Style errors and misspelled words then those things will detract from the story itself. Likewise, you can fix all the bad grammar and misplaced punctuation but if a story makes no sense, or if the lede is buried in the eighth paragraph, or if the story is biased or contains libelous content, then all the fixes you made wont amount to much. To see what we  mean, take a look at these sentences: Police said they confiscated three point two million dollars of cocain in what was a massiv drug bust. The CEO of Exon estimated that 5% of the companys profits would be plouwed back into resarch and development. Im sure youve figured out that these sentences primarily involve micro-editing. In the first sentence, cocaine and massive are spelled wrong and the dollar amount doesnt follow AP Style. In the second sentence, Exxon, plowed and research are misspelled, the percentage doesnt follow AP Style, and companys needs an apostrophe. Now, look at these sentences. The first example is meant to be a lede: There was a fire at a house last night. It was on Main Street. The fire burned the house to the ground and three children inside were killed.The CEO, who is known for his money-grubbing personality, said he would close the factory if it lost money. Here we see macro-editing problems. The first example is three sentences long when it should be one, and it buries the most important aspect of the story - the death of three children. The second sentence includes a potentially libelous bias - the money-grubbing CEO. As you can see, whether its micro- or macro-editing, a good editor has to catch every mistake in every story. As editors will tell you, theres no room for error.

The Epic Of Beowulf By William Beowulf - 1291 Words

The book Beowulf is a story of a man named Beowulf, who comes from the land of the Geats, who is continuously put to the test having to fight in battles, in which in his last battle he Beowulf finds death. After reading Beowulf I have concluded that this book is meant to glorify the men who have fought and succeeded in violent battles. Those men hold a legacy and power in which there name is known throughout. Those same men have children or sons and their sons continue to hold that legacy with them and make one of their own, if they do not then they no longer have power and fame and become unknown. Therefore in order to hold a legacy, have power, and become known, one must fight in brutal wars and must win in those wars, and one main person that fulfilled this duty was Beowulf. As the story begins it introduces a warrior, King Shield Sheafson, â€Å"scourge of many tribes, a wrecker of mead-benches, rampaging amoung foes†(3). Although he did not have a father he, â€Å"flourished later on as his powers waxed and his worth was proved†(3), he was known as one good king. It is he who became the founding father that started a legacy for the land of the Danes. King Shield had a famous son named Beow, who was then passed the throne after his father’s death. Beow was known through the North and â€Å"was well regarded and ruled the Danes for a long time†(7). He fathered four children, Heorogar, Hrothgar, Halga, and a daughter. Hrothgar is the only son that became known. Herorogar, Halga, and hisShow MoreRelatedThe Epic Of Beowulf By William Shakespeare1549 Words   |  7 PagesBeowulf is one of the earliest and most famous works of English literature, and is still widely read today. However, over a thousand years has passed since it wa s written down in England, and even longer since it was originally spread by word of mouth in the old norse lands, and our values and concepts of the world are radically different than the people of Beowulf’s age. Although the epic Beowulf shows their concept of simplistic duality, in which there is only black and white, good and evil, theRead MoreThe Epic Of Beowulf By William Shakespeare932 Words   |  4 Pageshave the values of being kind and modest. Before Beowulf arrived to Herot he was known for his heroism, which was shown again and again during the fight with Grendel, the fight with Grendel’s mother, and his final battle with the dragon. While his heroism was shown at each of these events, there were changes in his heroic nature over time. Regardless of these changes, he was still seen as the mighty hero throughout the epic poem of Beowulf. As Beowulf was making his voyage to Herot from Geatland toRead MoreThe Epic Of Beowulf By William Shakespeare939 Words   |  4 Pageswithout actually writing things down. These epics would be passed from one another through verbal communication and were based around different aspects of life for a someone of Anglo-Saxon descent. The story Beowulf is a perfect example of how Anglo-Saxons based their stories around their beliefs on how a hero should behave. Around the time the story was first told, people were often terrified of the horrible things in the world. The character Beowulf was built around how a hero would be representedRead MoreThe Epic Of Beowulf By William Shakespeare977 Words   |  4 Pageslooking at a culture’s epic tales and heroes one can get an insight to the culture’s values and traits that are noble to them. Beowulf, as an epic hero, is a direct representation of the ideal man as seen through Anglo-Saxon eyes. In looking at the poem Beowulf an d analyzing the characteristics of the epic hero, it will become evident the desired attributes that were desired in the Anglo-Saxon culture: physical strength, pride, bravery, selflessness, and loyalty. An epic hero is a person thatRead MoreThe Epic Of Beowulf By William Shakespeare953 Words   |  4 PagesBeowulf is one of the most well known pieces of literature in history. Written between 700 and 1000 AD, this poem has captured the minds of scholars, historians, and readers across the globe. However, despite the fact that it has been passed down for numerous centuries, perhaps one of its most fascinating characteristics are the intriguing battles that Beowulf, the protagonist, takes on. Throughout this epic poem, Beowulf takes on many battles, all of which are practically unwinnable. Each battleRead MoreThe Epic Of Beowulf By William Shakespeare1549 Words   |  7 PagesBeowulf is one of the earliest and most famous works of English literature, and is still widely read today. However, over a thousand years has passed since it was written down in England, and even longer since it was originally spread by word of mouth in the old Norse lands, and our values and concepts of th e world are radically different than the people of Beowulf’s age. Although the epic Beowulf shows their concept of simplistic duality, in which there is only black and white, good and evil, theRead MoreThe Epic Of Beowulf By William Shakespeare935 Words   |  4 Pageshis life for the good of others , well Beowulf was both. In the novel Beowulf , to me, the main theme of the entire story is heroism. Beowulf is your knight in shining armor or your fire fighter who goes into a living hell to save a kitten. Heroism is scattered all over this epic poem. Sure paganism and christianity are in it as well as good vs evil but they are not as i would say the backbone of Beowulf. to prove my opinion I shall gather quotes from the epic novel would strongly aid the fact thatRead MoreThe Epic Of Beowulf By William Shakespeare1176 Words   |  5 Pagesbeen nearly fifteen movies that were made after â€Å"Beowulf†. It may be due to the fact that â€Å"Beowulf† is one of th e most famous epic poems in the English Literature history. It is also the oldest surviving epic poem to date. â€Å"Beowulf† was written in 10000 AD in Old English by an author who remains unknown. In â€Å"Beowulf†, there are many important literary elements that help empathize the main motif of the poem. The motif of this poem is courage. Beowulf is about courage and it is shown through the charactersRead MoreThe Epic Of Beowulf By William Shakespeare1401 Words   |  6 PagesAnglo-Saxon focus qualities. A champion amongst the most prestigious works from that time period is Beowulf. The story tells us of how one man, Beowulf, sails to the rescue of King Hrothgar and his kinfolk remembering the final objective to extra them from a horrifying beast that is undermining their lives and additionally their way of life. The warrior Beowulf without a doubt demonstrates characteristics of an epic legend through valor, dedication, generosity, family relationship, accomplishi ng somethingRead MoreThe Epic Of Beowulf By William Shakespeare1836 Words   |  8 PagesBeowulf is one in a sea of many epic poems exemplifying battle, glory, great leaders, and, inevitably, death. Classic plot lines have followed the general flow of such stories from exposition to conflict to resolution, the majoity thriving off of a hero-villan mentality. The battle between good and evil has been perpetuated throughout history in literature and story. The media today suffers from the clear segregation of right and wrong just as much as society did in the days that Beowulf was first

Essay about Whitman vs. Dickinson - 759 Words

Whitman vs. Dickinson Death; termination of vital existence; passing away of the physical state. Dying comes along with a pool of emotions that writers have many times tried to explain. Emily Dickinson and Walt Whitman were two pioneer poets from the Romantic Era, that introduced new, freer styles of writing to modern poetry at the time. Both Whitman and Dickinson have similar ideas in their writing, but each has a unique touch of expression in their works. Both poets have portrayed death in their poetry as a relief, a salvation, or escape to a better place- another life. They have formulated death as a positive yet ambiguous state. In Dickinsons Narrow Fellow in the Grass and Whitmans Wound-Dresser, there exists a link†¦show more content†¦Whitman also describes death in a very delicate manner, which allows the reader to feel that death is in a way, good. For instance, he describes the soldiers as noisy in war, but when they die, there is silence. Silence resembles death, yet its not a negative way of expressing it. As the poet encounters with more memories of suffering, he calls to death: Come sweet death! be persuaded O beautiful death!/ In mercy come quickly (lines 44-45). He believes death will alleviate the pains and that it is good. Another delicate way of describing death, and an excellent choice of words, is when he says he recalls the experience (as) sweet and sad (line 63) These young soldiers have so much life ahead of them and they are dying, this makes it sad. Yet since they are suffering so much, its sweet that they die. In this particular poem, Whitman portrays an attitude of positive welcoming of death. The positive outlook that Whitman portrays towards death in his poem the Wound-Dresser, is similarly shown in Emily Dickinsons Narrow Fellow in the Grass. She tells a simple story with impressive word choices that allow for deep interpretation and symbolism. Her poem narrates the story of a dead man laying on the ground that looks as if the Grass divides as with a comb- (line 5). He (meaning the dead man) likes Boggy Acre/ A Floor too cool for Corn- (lines 9-10). Notice as she uses the word likes as if the dead man still lived or had feelings towards theShow MoreRelated Dickinson vs Whitman Essay611 Words   |  3 PagesDickinson vs Whitman Two Poets, Walt Whitman and Emily Dickinson are probably two of the most influential people in American poetry. They are regarded as the founders modern American poetry. Walt Whitman (1819-1892), for the time was breaking new ground with his diverse, energetic verse with regards to subject matter, form and style whether talking about overlooked objects in nature such as a single blade of grass or even our own hearing. Emily Dickinson (1830-1886) while living a life ofRead More Dickinson Vs. Whitman Essay1229 Words   |  5 Pages Dickinson vs. Whitman After receiving five years of schooling, Walt Whitman spent four years learning the printing trade; Emily Dickinson returned home after receiving schooling to be with her family and never really had a job. Walt Whitman spent most of his time observing people and New York City. Dickinson rarely left her house and she didnt associate with many people other than her family. In this essay I will be comparing Emily Dickinson and Walt Whitman. Emily Dickinsons life differs greatlyRead MoreThe Language of Protest in Shakespeare, Blake, Whitman, Dickinson, Frost, and Rich: Exterior vs. Interior Life1073 Words   |  4 Pagesï » ¿The language of protest in Shakespeare, Blake, Whitman, Dickinson, Frost, and Rich: Exterior versus interior life William Shakespeares Hamlet, on its surface, is a play about a man avenging the death of his father. However, Shakespeare invests the play with a meaning that transcends its plot, despite the fact that it is a performed poetic drama. Even before he learns that his father was murdered, Hamlet is presented to the audience as a man who is depressed and angry at the world. Tis notRead MoreAnalysis Of Walt Whitman s I Hear America Poem1314 Words   |  6 Pagesnot so much. We rewrote the Declaration of Independence, Walt Whitman s I Hear America poem, and argumentative essays, like out The Raven analysis. We also gave speeches– that was the hardest for me, in my previous English classes, none of them made me go in front of the class and present–, made infograph, and even a multigenre project. We also can’t forget the books we’ve read in class, like poems from Emily Dickinson, Walt Whitman, Edgar Allan Poe, and novels from F. Scott Fitzgerald, and we can†™tRead MoreHistory Now1070 Words   |  5 PagesDue Date Tasks Friday, 2/3/2012 Begin Unit: Loyalty and Betrayal, Section A, Order and Chaos Order and Chaos: Introduction Section Warm-Up: Product Loyalty Loyalty vs. Betrayal Literary Elements: Symbolism Tutorial: Symbols and Symbolism Reading 1: Two Kinds, by Amy Tan Practice: Symbolism Loyalty and Betrayal Theme Quiz, 40 points Friday, 2/10/2012 Begin Unit: Loyalty and Betrayal, Section B, Context Context: Introduction Section Warm-Up: A Context Riddle Reading 2: from CommunistsRead MoreBrief Survey of American Literature3339 Words   |  14 PagesRevolution(1789—1799) Romantic vs. Neoclassic (1) Neoclassicism: - reason, order, elegant wit - rationalism of enlightenment in 18th-cent. Romanticism: - passion, emotion, natural beauty - imagination, mysticism, liberalism (freedom to express personal feelings) Romantic vs. Neoclassic (2) Innovation: - subjects: common life; the supernatural; the far away and the long ago - style: common language really used by men; poetic symbolism Romantic vs. Neoclassic(3) Good poetry

Depression And Dementi Depression - 1276 Words

Several studies have shown links between depression and dementia. Brommelhoff, Johansson, Fratiglioni, Gatz, McArdle, Pederson state, â€Å"there are three hypotheses that might explain the association† (Jorm, 2001). The first is that depression is a symptom that indicates the onset of dementia, also known as a prodromal feature. The second is that the two are independent illnesses; however, depression causes cognitive deficits, which lead to an earlier onset of dementia. The last argues that depression causes damage in the hippocampus, which then leads to dementia. Some studies have found depression to be a prodrome of dementia. One specifically found that depression arises due to neuropathological damages during the course of dementia, and another showed that people with late onset depression had greater frontal lobe atrophy than controls and those with early onset depression. On the other hand, it has been shown that a history of depression increases the risk of dementia l ater in life. There is some evidence that the earlier the onset of depression, the greater the likelihood is of developing dementia later; however, this only held true in individuals with little education. The disagreement and contradiction in previous studies call for further experimentation, primarily to determine â€Å"whether a history of depression significantly predicted the likelihood of having dementia later in life† (Brommelhoff et al., 2009). Researchers examined the difference in the number of yearsShow MoreRelatedLevel 3 Health and Social Care Unit 365dementia3984 Words   |  16 Pagestype of Prp mutation involved. There may even be a great variation in the symptoms within affected members of the same family. Sometimes, the symptom pattern is similar to that found in sporadic CJD, namely: early symptoms may be like those of depression-mood swings, memory lapses, social withdrawal and lack of interest. However rapid progression to dementia and neurological symptoms are distinctive. Within weeks the patient may become unsteady on their feet, lacking in coordination and clumsy

A Study Of Nanofiber Technology Environmental Sciences Essay Free Essays

string(138) " the obvious pick as our following basic beginning of energy, and the fuel cell is the obvious replacing for the internal burning engine\." The common acknowledgment to nanotechnology is â€Å" engineering to bring forth something with the characteristic by commanding the atom and molecule in the graduated table from 1nm to 100nm to alter the construction and agreement of the substance. Therefore, Nanofibers are define as fibre with diameter more than 100nm. Nanofibers are produced by Electrospinning and interfacial polymerisation. We will write a custom essay sample on A Study Of Nanofiber Technology Environmental Sciences Essay or any similar topic only for you Order Now The most frequent stuff with nanofiber morphology are Ti dioxideA ( TiO2 ) , A Si dioxideA ( SiO2 ) , Zr dioxide ( ZrO2 ) , A aluminium oxideA ( Al2O3 ) , A Li titanate ( Li4Ti5O12 ) , A Ti nitrideA ( TiN ) orA platinumA ( Pt ) . Electrospinning is a procedure uses an electrical charge to pull really all right fibres from a liquid. Electrospinning portions the feature of both electrospraying and conventional solution dry spinning of fibres. The advantages is that Electrospinning procedure does n’t necessitate the usage of curdling chemical science or high temperature to bring forth. Therefore the procedure is suited for production of fibres utilizing big and complex molecules. Nanofiber can be used in many Fieldss such as filtration, such as HVAC system filters, HEPA, ULPA High efficient filters, Air, oil, fuel filters for automotive, Filters for drink, pharmaceutics and medical applications. Furthermore, nanofiber can utilize in making fabric for fabric. For illustration, at hletics dresss, athletics places, outerwear and many more. hypertext transfer protocol: //www.nanotech-now.com/images/nanofiber-large.jpg Nanofiber in high efficiency filtration application Nanofibers presents had been introduced into a new degree of public presentation that is is the air filtration. Due to the feature of nanofiber holding the thickness equal to merely several nanofiber diameters and was laid on a hempen substrate that to boot serves as a safety filter. The tenuity of the nanofiber bed coupled with fiber denseness considerable increase the fractional efficiency of the filter media with no important negative impact on permeableness to air flow. These type of constellation met the demand to bring forth high efficiency filtration. Common advantages of nanofibers in air filtration There are two primary map for polymeric nanofiber webs usage in filtration application. The advantage of nanofiber in air filtration is that it heighten the efficiency of the base stuff, making a composite media with good handling belongingss and good efficiency for many industrial and engine-related application. Furthermore, nanofiber is more thin in comparing with other method that is through the application of charged meltdown fibre. The 2nd advantage is that, polymeric nanofibre webs improve the surface lading behaviour of typical filtration stuff. When the filtration is utilizing other method, when clip base on balls, the peculiar affair become profoundly embedded in the hempen construction, finally it will forestall the air flow. But when polymeric nanofiber web is applied to the upstream side of the filter medium, the particulate affair is caught at the surface of the nanofiber web. The grounds why nanofiber web is better is because that the surface lading behavior allows the filter to be cleanable through standard mechanism like back forcing or agitating. Solidity and nanofibers in air filtration In nanometer scope of nanofiber, the consequence of faux pas flow at the fibre surface has to be taken into accouint. Due to the faux pas at the fibre surface, the draw force on a fiber is smaller than in the instance of non-slip flow which turn into lower force per unit area bead. In the other manus, the faux pas flow makes the part of the air fluxing near the fibre surface larger than that in the instance of non-slip flow, which translates into more atoms going near the fibre. This cause in higher diffusion interception and inertial impaction efficenceies. The function of solidness is complicate, as it affects both force per unit area bead and efficiency in the same way. When solidness addition, drag per unit length of fibre besides addition. Diffusion and interception is taken into history for high efficiency as they are the dominant mechanisms near the most acute atom size. We can state that, withing the locality of the most acute atom size, the figure of MERIT below show that decreased with increased of solidness The figure of MERIT show that different solidnesss for nanofibre media at 10.5fpm Dust Collector Applications Recently, dust aggregator had been introduce to the nanofiber engineering to pin down more dust on the surface of the filter than the conventional trade good types of filter media such as depth-loading cellulose, polyester or cellulose/polyester blend The procedure of the dust aggregator can be describe on the figure below The dust aggregator cartridge filter play the of import function of the filtration. There are may type of cartridge available. There are Ultra-Web merchandise from the Donaldson where it supply alone filtration efficiency. The advanced surface filtration engineering ensures longest life and lowest operation force per unit area bead in scope of cartridges. It is a high public presentation option to commodity-type pleated cellulose or cellulose/synthetic blended media that captures submicron dust atoms on the surface of the media. Nanofiber is a cellulose/synthetic composite media that forms a web-like cyberspace of really all right fibres 0.2 to 0.3 micrometers in diameter. Cellulose and intermix media have fibres at least 10 micrometer in diameter and big pores between fibres ( up to 60 micrometer ) that allow dust to perforate deep into the media, rapidly stop uping and cut downing filter life. Decision Although there are differing sentiments among the experts on the topic sing the planetary supply of oil, even the most optimistic of them predict that the planetary production of conventional oil is likely to top out sometime between 2010 and 2020 [ 10 ] . If we are to be prepared for this inevitableness we must speed up our acceptance of alternate fuels so we are at least prepared to run into the challenge when it arises. With its ubiquitousness in the existence and on our planet and its possible as one of the cleanest and most efficient fuel beginnings available to us, H is the obvious pick as our following basic beginning of energy, and the fuel cell is the obvious replacing for the internal burning engine. You read "A Study Of Nanofiber Technology Environmental Sciences Essay" in category "Essay examples" In order to show in this new epoch of energy, many obstructions must be overcome and many new technological progresss must be developed into feasible solutions. One such application that has been demonstrated to hold immense potency in this way is that of C nanofibers as a H storage medium for fuel cells, peculiarly in the transit sector. There is still a long manner to travel and much work to be done, but in this writer ‘s sentiment it is clip to get down the undertaking of turning the positive consequences born of research into the feasible solutions born of technology. Beside that, nanofiber engineering besides contribute in the air filtration. The importance of this is because filtration can do the air cleaner prevent the air from polluted. The nanofiber with the characteristic with the diameter that are less than 1000nm successfully barricade the particulate affair on the surface of the nanofiber web. It believes that, with the farther researching on nanofiber, many advantages and use will be discovered in the hereafter. Hydrogen Storage Medium for Fuel Cell with Carbon Nanofibers in Transportation Sector Introduction to the H as fuel cell: Nowadays, as the planetary issues has become a serious fact to human being, as high outlook to a renewable, environment-friendly and carbon-zero emanation energy beginnings, H have became the best future new energy beginning. The benefit of utilizing the H: Illimitable measures as H2O screen more than 70 % of the Earth The burning of H merely produces H2O and heat as byproduct Therefore H is really suited to be used for vehicle power beginning. Although H can be generated on-board a vehicle by reforming methyl alcohol or other type of hydro-carbons, but a better manner, that is store pure H on-board the vehicle without any reformation procedure required. The challenge of utilizing H fuel cell in automotive application: The H storage system should be safe The H storage system should be light and do non act upon the efficiency of the system by its weight. There are several methods to hive away the H: Compressed H gas Liquid H Gas-on-solid physical surface assimilation We can explicate the efficiency by wt % , which mean the ratio of stored H weight to the entire storage system weight of a vehicle. The compress H method: Disadvantage in safety due to the involved of force per unit area to compact the H. Suffer to the permeableness and embrittlement ( doing it brickle ) of the metal armored combat vehicle due to high force per unit area. These method merely can accomplish 2wt % with conventional storage armored combat vehicle and 5wt % utilizing expensive C fiber-wrapped polymer armored combat vehicles. Liquid H Safer to compact storage system due to low force per unit area demand Disadvantages in possible loss through vaporization Require energy and insularity to maintain the H in liquid province Merely achieve 3wt % . Gas-on-solid surface assimilation Investigated with C nanostructures ( C nanofibers ) A procedure which a gaseous substance condenses on the free surfaces of a solid The procedure merely affect weak molecular force ( Eg: Van der Waals force ) , the input energy is minimized. Gas-on-solid surface assimilation can accomplish upwards of 15wt % and more. How the Fuels Cells Function? The cell consists of an anode and cathode, and electrolyte in between to let positive ions to go through through. The H fuel is fed to anode and the atmospheric O is fed to the cathode. When activated by accelerator ( Pt on the cathode ) , the H atom separate into negatron and protons. The negatrons take a way through an electrical circuit and burden, while the protons take a way through the electrolyte. When the negatrons and protons run into once more at the cathode, they recombine along with the O atoms to bring forth H2O and heat. This procedure required changeless supply of H and hence, the H should hive away in a safe and efficiency manner. Carbon Nanofibers Carbon nanofibers consist of spiral like fibres made up of really little graphite sheets that are stacked in specific constellations and separated by distances of 0.335 – 0.342 nanometer. Hydrogen has a kinetic diameter of 0.289 nanometers, which is somewhat smaller than the 0.335 – 0.342 nm interlayer spacing in C nanofibers. To fix the C nanofibers for H surface assimilation, C nanofibers are placed in a vas and exposed to hydrogen under force per unit areas of 120-130 standard pressure at room temperature, the H slips between the graphite sheets of the C nanofibers and adsorbs to surface of the C beds. During the procedure, drosss metal and chemisorbed gases are carefully removed. The diagram above represent the H adsorbing between the graphite sheets of C nanofiber. A H lattice parametric quantity of 0.35 nanometer has been observed following the broadening of the interlayer spacing of the C nanofibers and formation of subsequent beds of H. Since this measuring is smaller than the mensural majority hexagonal stopping point jammed lattice parametric quantity of 0.376 nanometers for H, it has been proposed that the unique construction of the C nanofibers suppresses the mobility of the H and causes it to follow an remarkably extremely jammed province, which does much to explicate the high storage degrees that have been systematically measured. Upon controlled release of the force per unit area, the H desorbs from the C nanofibers and is released as molecular H gas. While the rate of surface assimilation is comparatively slow, on the order of hours, adequately fast desorption rates of ~57 mlA?/min have been reproducibly demonstrated. Analysis of the discharged gas indicates that H is so the lone constituent nowadays and therefore that there are no inauspicious reactions happening between the C nanofibers or any drosss and the H throughout the procedure. It should be noted that in finding the adsorptive capacity of the nanofibers it was discovered that non all of the adsorbed H is released in the desorption procedure at room temperature under atmospheric conditions. This fraction of strongly held H that is retained has been attributed to a comparatively little sum of chemosorption occurring, and has been confirmed through high temperature experiments on dismissed C nanofibers utilizing N and a thermic conduction sensor. The C Nanofiber Hydrogen Fuel Tank The principle application of a C nanofiber H storage medium is in a fuel armored combat vehicle for an incorporate on-board fuel cell system with a polymer electrolyte membrane ( PEM ) fuel cell stack at its nucleus and a H supply stored as adsorbed H in a pressurized armored combat vehicle incorporating C nanofibers. The PEM fuel cell is ideal for automotive applications because it operates at comparatively low temperatures and can change its end product to run into changing power demands. In this system, the H storage armored combat vehicle consists of a steel or composite armored combat vehicle or case shot filled with vapor adult C nanofibers with adsorbed H nowadays. The fresh armored combat vehicle is kept pressurized at about 100-120 standard pressure to keep the adsorbed province of the H. The armored combat vehicle is connected to the fuel cell via a regulated force per unit area nose assembly controlled by the onboard computing machine that monitors the system. As the fuel cell demands hydrogen through the normal operation of the vehicle, the force per unit area in the fuel armored combat vehicle is decreased and gaseous H is released through the nose assembly and directed to the fuel cell cathode for contact action and subsequent current coevals. The rate of release is variable harmonizing to energy demands and can change from zero to the maximal desorption rate available from the C nanofibers via incremental depressurize. Based on these computations ensuing in peculiarly light fuel armored combat vehicles full of H adsorbed on C nanofibers, and the fact that the surface assimilation procedure is much slower than the desorption procedure, it is suggested that the construct of replenishing the vehicle at a service. In this mode, the long surface assimilation times are relegated to the provider of the fuel and non to the consumer. Additionally, any wear or dislocation of the C nanofibers that may happen can be monitored and those units that have deteriorated beyond utility can be recycled. Decision Although there are differing sentiments among the experts on the topic sing the planetary supply of oil, even the most optimistic of them predict that the planetary production of conventional oil is likely to top out sometime between 2010 and 2020 [ 10 ] . If we are to be prepared for this inevitableness we must speed up our acceptance of alternate fuels so we are at least prepared to run into the challenge when it arises. With its ubiquitousness in the existence and on our planet and its possible as one of the cleanest and most efficient fuel beginnings available to us, H is the obvious pick as our following basic beginning of energy, and the fuel cell is the obvious replacing for the internal burning engine. In order to show in this new epoch of energy, many obstructions must be overcome and many new technological progresss must be developed into feasible solutions. One such application that has been demonstrated to hold immense potency in this way is that of C nanofibers as a H storage medium for fuel cells, peculiarly in the transit sector. There is still a long manner to travel and much work to be done, but in this writer ‘s sentiment it is clip to get down the undertaking of turning the positive consequences born of research into the feasible solutions born of technology. How to cite A Study Of Nanofiber Technology Environmental Sciences Essay, Essay examples