Economic of the Airline Industry Essay Example | Topics and Well Written Essays - 2000 words

Economic of the Airline Industry - Essay Example Changes in investment activity, employment, and prices may be a recurring and frequent manifestation of economic development in a competitive and dynamic economy. Kanter (1995:71) on his work of "Mastering Change" argues that success in the present day business is not for those companies that re-engineer the way they do things, or for those fixing the past. According to Kanter (1995) such an action will not constitute an adequate response. This is so because success is based on an organisation's ability to create, rather than predict the future by developing those products that will literally transform the way the world thinks and view it self and the needs (Kanter 1995:71). This report looks at the industry environment of the airline industry, the microenvironment, and the global environment. This report draws primarily on Porter's interpretation of the literature on industrial organization economics to identify competitive forces. The central theme in the paper is that, if an airline company is to survive and prosper, its management must understand the implications that environmental forces have for strategic opportunities and threats. Focus on the paper is on the determinants of demand of air travel. The paper also looks at the nature of competition of the low airline industry. According to Jayathi (2005), competition in the airline industry has been fierce since the industry was deregulated in 1978. Under the believe that through deregulation more competition would improve efficiency and reduce prices and bring overall benefits to the consumer. Jayathi (2005), postulates that, while practices like monopolies, cartels, price discrimination, are considered inefficient allocation of resources in other industries, it can actually be beneficial in the case of the airline industry in bringing about an efficient equilibrium (Jayathi 2005). All things being equal, the demand of air travel will be affected by a number of important change drivers. Using Porters five forces and the PESTLE framework the factors affecting the demand for air travels will be explained inline with the demand and supply graph. Figure 1 and Two According to Johnson et al (2005), in the macroeconomic environment changes in the growth rate of the economy, interest rates, currency exchange rates, and inflation rates are all major determinants of the overall level of demand. Adverse changes in any of these can threaten profitability in an industry. For example, Johnson et al. (2005) states that a fall in the interest rate will increase consumers desire to borrow , and consequently more financing options for air travel. Where interest rates are high, this will affect the airline industry negatively. From Figure one above, an increase in the prices of air fare tickets from D1 to D2 increases demand for air travels from Q1 to Q3. In addition, the PESTLE model further refers to technological factors as important change drivers in determining demand in the airline industry. In the post-World War II period, the pace of technological change has accelerated, unleashing a perennial gale of creative destruction (Johnson et al 2005). Technological change can make established products obsolescent overnight, but at the same time, it can create new products and processes. Thus technological cha

My Journal Entry Week Essay Example for Free

My Journal Entry Week Essay â€Å"Well that’s what we did with my kids and they turned out just fine.† Is a phrase that I have heard plenty of times over the years. I tend to be a very honest person no matter the situation or consequences so I have ticked off a lot of people over the years and have lost many of friends for being such an honest opinions or advice. I have three handsome and polite little boys. Well at least most of the time. Over the years I have been approached by parents of their friends that they go to school with and were asked if my boy could stay the night with their boy. Now don’t get me wrong I love sleepovers when they are done at my house or it is at a house of responsible mature parents. My oldest son just became a teen ager. How exciting right? Yea right now he constantly wants to go and stay with friends. These friends that he has are rotten, mean and ignorant boys. I know that it is not their fault but, their parents fault for how they are raised. I also know these parents as well and know what kind of parents they are and how they live their lives. One of the fathers to the boys called me a while back and wanted my son to come and stay the night with his boy. Not only did he call me while he was intoxicated but he lets his son drink as well. I told him no. He asked me why I was being so difficult about my son staying over I decided just to be brutally honest with him. He actually said these same words. â€Å"Well that’s what we did with my kids and they turned out just fine.† He must have thought I did not have access to a television because a few weeks earlier his oldest son was on the evening news for being drunk and being involved in a stabbing. I most certainly do not think they turned out just fine. For a case that this saying may be true in some cases would be if the parent was talking about their child taking an extra class or volunteering at shelter of some kind. When I was fourteen my parents always had me work in the summer to earn my own money. Not only did it not bother my future any but, made it much better by teaching me responsibility. Why is it important to utilize problem-solving techniques in exploring developmental issues, grounded in child development theory to explain and/or demonstrate a foundational knowledge of the childrens developmental continuum, from conception? Because there are many questions that need to be answer starting from birth until old age. Does baby dream? To stress at an older age. If scientist investigate all these  questions to find answers you may discover how to keep a baby calm when nothing else seems to work to how to help an aging parent hoe to remember simple things such as where they left their eye glasses. What makes scholarly research different from anecdotal evidence (or personal experience) in explaining child and adolescent development? [Hint: Consider the methodology of the articles you are reading.] Anecdotal evidence is evidence that comes from anecdotes. Anecdotal evidence is known to be suspicious and is not to be relied on. Scholarly research is research that is done by scholars and professionals that can show evidence that can be relied on. Identify and briefly describe the key points of one theory and why you feel that theory is applicable to child and/or adolescent development. I agree with the Erik Erikson that conflict is the major concept of human development when it comes to establishing an identity in life. If a child does not deal with the conflicts they may not be able to establish their role in life as easily as others or maybe not at all. This leads to a lot of confusion. Finally, relate the value of continued learning with a concluding reflection on why we should incorporate both personal experience and scholarly research grounded in theory to help support any statements made in this class or any other professional setting. I think it is important to have any and all evidence no matter what it may be. The more research and life lesson we learn the better we will learn in the future by learning from school and past mistakes. Mossler, R.A. (2011). Child and adolescent development. San Diego, CA: Bridgepoint Education, Inc. Endless Questions video About.com Psychology

Advantages And Disadvantages Of Supercritical Fluid Chromatography Engineering Essay

Advantages And Disadvantages Of Supercritical Fluid Chromatography Engineering Essay Even though high performance liquid chromatography is a widely used technique for extractions of analytes in many classes, SFC has clear advantages over it. In HPLC a substantial amount of organic solvent is generated with each extraction, which then needs to be disposed. However, the disposal of the organic solvents is expensive at $5 $10 per gallon, whereas SFC uses considerably less or no organic solvent which leads to a decrease in analysis costs [1]. In replacement of organic solvents an inert environmentally friendly mobile phase is used, often carbon dioxide which can be collected from the atmosphere, as it is energy efficient in the isolation of the desired products [2]. Also without the use organic solvents the product is more concentrated compared to HPLC where the solvent must be evaporated, without the need to evaporate any solvent there is a reduction in energy and labour costs [2]. SFC is similar to gas chromatography (GC) in that it has a lower viscosity and higher diffusion coefficient than HPLC which allows for quicker, more efficient separations as it more effective at entering porous solid materials than liquid solvents. The separation time can be cut down from hours or days to a few tens of minutes [3]. As seen in Table 1, supercritical fluids lie between liquids and gases, which allows for SFC to use features of both HPLC and GC. Due to supercritical fluids having gas like and liquid like density it has a greater solvating power so SFC has a larger molecular range which includes non-volatile molecules which methods like GC do not include [1, 4]. Also, unlike GC which does not analyse thermally unstable compounds, SFC is able to due to the low critical temperatures of supercritical fluids such as carbon dioxide (31oC) [1] ; an advantage of supercritical fluid carbon dioxide is that it has a varied solvating strength that allows for selective extractions [5]. Along with this by altering the temperature and/or pressure it is possible to achieve higher selectivity. The range of detectors is also wider for SFC compared to GC or HPLC this is because in SFC the mobile phase can be liquid or gas like, so GC and HPLC detectors can be used [1]. For example SFC with flame ionization detection (FID) can provide quantification of resolved materials with a sensitivity of 0.1 ng [4]. Due to the range of detectors available for SFC and the low critical temperature of the carbon dioxide mobile phase, the detection and analysis of thermally labile compounds has been successful [3, 5]. Another advantage SFC has over HPLC is separation of chiral compounds, in HPLC the process is very time consuming, in SFC however, due to the lower viscosity of the supercritical fluids, the chiral separation can be run at a flow rate of up to 5 times faster than that of the HPLC all while avoiding pressure build up. The higher flow rate of SFC consequently means that the productivity is higher than HPLC methods [2]. When used in large scale extractions, fluid carbon dioxide can be recycled and then reused this minimize the amount of waste generated [3]. Property Gas Supercritical Fluid Liquid Density g/cm3 (0.6-2) x 10-3 0.2-0.5 0.6-1.6 Diffusion Coefficient cm2/s (1-4) x 10-1 10-3-10-4 (0.2-2) x 10-5 Viscosity g cm-1 s-1 (1-3) x 10-4 (1-3) x 10-4 (0.2-3) x 10-2Table 1: Comparison of Properties of Supercritical Fluids, Liquids and Gases [1] Due to the fact that SFC has features of both GC and HPLC, SFC has diversity in the columns that can be used which are either open tubular (GC) or packed (HPLC). In packed column SFC by choosing suitable column dimensions and particle size [6], this can cause an increase in the number of theoretical plates (over 100,000) [2, 6]. Further advantage is SFC is very clean; mobile phase contaminants are usually trace quantities of other gases. The mobile phase is very free of dissolved oxygen and is not particularly reactive and the mobile phase is easily and rapidly removed [2]. A disadvantage of using carbon dioxide as the mobile phase is it does not elute very polar or ionic compounds; this is overcome by using an organic modifier. However, there are some disadvantages of SFC these include that if molecules are highly polar they are not soluble in the mobile phase. Usually SFC only moves a small amount of a large specimen onto the column Limited availability However, these limitations have been overcome through instrumental modifications that more appropriately address purifications of micro-scale and nano-scale quantities of physiological molecules. More sophisticated 2D systems (2D-SFC) allow for the interfacing of 2 SFC columns having different column coatings or packing and thus provide for orthogonal separation capabilities [2]. Instrumentation used in SFC Originally, SFC instruments were based on HPLC designs with some modifications, however now the design includes a pumping system, modifier module, post-column nozzle and a separator detector [2]. The mobile phase in SFC is pumped as a liquid and then heated up past supercritical temperature until it reaches the supercritical region. The mobile phase passes through the injection valve before the sample is introduced, which carries the sample into the analytical column. To ensure the mobile phase stays supercritical, pressure restrictors are placed at the sides of the detector or at the end of the column. The pressure restrictors are heated as too avoid clogging [7]. As SFC uses a supercritical fluid as mobile phase, there are two possible types of column setup; one setup is HPLC like which consist of two reciprocating pumps these allow the mobile phase to mix and the introduction of a modifier, a packed column which are placed in an oven the detector used is an optical detector and the pressure and flow rates can be controlled separately [7]. Packed column SFC has recently become popular again over the past decade due to drug discovery and the pharmaceutical industry, as it offers the use of an environmentally friendly mobile phase, carbon dioxide, decrease in waste generation and provides purified materials even on a large scale, when used for drug discovery packed SFC is usually coupled with a mass spectrometer detector [2, 8]. In SFC there are lower eluent viscosity and higher diffusion coefficient which as a result lead to an increase in efficiency and a shorter separation time, the low viscosity causes only slight pressure drops which in tu rn allows for the flow rate to be quicker (3-5 mL min-1) compared to that of HPLC (typically ~1 mL min-1) [1, 8]. The other column setup is capillary SFC which is an extension of GC that includes a syringe pump and a capillary column inside a GC oven with a restrictor with a flame ionisation detector (FID), however, in capillary SFC the flow rate of the pump controls the pressure of the system [6, 7]. Other detection methods are also used for capillary SFC one method is Fourier transform infrared (FT-IR) spectrometry. Capillary SFC is used for high separation power and is more suited for fluids with low density. However, capillary columns have some limitations these include sample loading capacity, detection limits and quantitation [6, 7]. As mentioned FID is mostly used for capillary SFC, although in certain cases FID can be used with packed column SFC when a non-flammable mobile phase is used. However, the mobile phase that is used is usually carbon dioxide which requires an organic modifier to deactivate any unbounded silanol groups in the stationary phase [10] thus causing the mobile phase to become flammable this in turn causes a high background signal and a loss of sensitivity. Alternatively, modifiers like esters or lower alcohols can be used in packed column SFC in order to improve the elution of polar compounds [9]. However, to avoid the use of modifiers, open-tubular capillary columns can be used, since silanol groups are not present in the stationary phase [10]. Compared to capillary columns, packed columns display higher efficiency per unit time; also separations can be transported directly from analytical or preparative liquid chromatography (LC) to SFC. Moreover, a standard liquid chromatograph can easily be converted into a supercritical fluid chromatograph [11]. It has was found that certain separations that were developed on a 50 ÃŽÂ ¼m i.d. capillary column can be repeated with the same or better performance on a 1 mm i.d. (microbore) packed column. The packed column system has the additional advantage of yielding excellent peak area precision. It is also shown that the combination of water and formic acid is an effective modifier for CO2 which can be used with FID [6]. A study using the water and formic acid modifier was conducted by H. E. Schwartz et al. formic acid is used as it has low background noise and therefore is more favourable, however another problem arises when using this modifier and that large gradient humps appeared during the run, these were most probably because of organic impurities in formic acid. A way round this problem is that water is added to the carbon dioxide via the use of an aquafier system, the aquafier system used by H. E. Schwartz et al. was a 15 cm x 4.6 mm i.d. silica column (100-200 mesh) that was saturated with ca. 40% w/w water. The column was placed between the pump outlet and injection valve. A test mixture of the formic acid and water modifier was performed by H. E. Schwartz et al. and prodcued the chromatogram as seen in Figure 1[6]. Figure 1 Chromatogram of a test mixture of formic acid/water/CO2 mobile phase. Peak identification (from left to right): n-eicosane, anthraquinone, n-triacontane, tocopherol acetate, cholesterol [6]. In Figure 1 the baseline rises this was due to the pressure program used, however due to the addition of water to the mobile phase which prevented the accumulation of formic acid on the head of the column no hump is visible. In Figure 1 it can also be seen that all the peaks have good shape and resolution even for the more polar compounds like anthraquinone, tocopherol acetate and cholesterol [6]. Mobile phases and stationary phases used in SFC In SFC the density of the mobile phase is about 200-500 times greater to that in gas chromatography. Compounds with high molecular weights are not usually detectable in gas chromatography, however with the density of the mobile phase being greater they can therefore be chromatographed [12]. A wide range of compounds have been tested for use as SFC mobile phases, however, a variety of these required special conditions, and would therefore not be suitable. This resulted in carbon dioxide CO2 being used as it was easily obtainable, low cost and safe [13], along with the critical temperature being 31oC and critical pressure being 73.8 atm [14]. A problem with CO2 as a mobile phase in a packed column is that if CO2 mobilizes a species then there is a possibility that the compound will be irreversibly adsorbed onto the column, this is because of the high activity of most sorbents, this does not happen in capillary SFC as inert fused silica open-tubular column are used. To avoid adsorption onto the column, surface activity needs to be decreased; this has been achieved by using modifiers [14]. There are two main reasons why modifiers are added to the mobile phase, first is that only a small amount of modifier is added in order to deactivate the sorbent active sites, second is when the modifier is added in higher concentrations (level of modifier needed is à ¢Ã¢â‚¬ °Ã‚ ¥1%)it improves the solubility of the analyte in the mobile phase [14]. One problem with using modifiers is they have a high response when a FID is used; this high response causes an increase in the baseline. The alternative to using FID which helps relieve this problem is the use of a ultra-violet absorption detector, although it is not as applicable to organic compounds compared to FID [14]. This is only true for packed SFC, as when capillary SFC is used most separations are done using only CO2, which is compatible with FID. Having only CO2 as the solid phase can cause slight defects on the chromatograms such as very broad peaks and not well resolved, as well as longer retention times, this is solved by adding a small amount of water to the mobile phase, hence improving the peaks and decreasing the retention time [12]. Modifiers which can be used with the mobile phase include methanol, acetonitrile, chloroform and formic acid. Methanol is the most popular modifier being used in both packed and capillary SFC, even though the addition of water speeds up elution of polar compounds in capillary SFC [12]; methanol has a greater effect when used with silica-packed columns [14]. The solubility of methanol, acetonitrile and chloroform in CO2 was studied by K. L. Maguire and R. B. Denyszyn, they found out that when the pressure is below 90 for methanol/CO2 there was little effect on solubility, but when raised above 90 there was a substantial increase. Acetonitrile/CO2 had very little pressure dependence but small temperature dependence. Finally, chloroform/CO2 both pressure and temperature had a small effect on solubility, when either was raised the solubility of chloroform increased [14]. Research by G. L. Pariente and P. R. Griffiths showed when carboxylic acid groups were present in the analyte the retention time was greatly increased while still using CO2 mobile phase. The cause of this could be due to that the solubility of these polar molecules is low and the solvation is not great enough to overcome the strong hydrogen bonds. The alternative mobile phase used was chlorofluorocarbon (CCl2F2), in comparison to CO2 which had a capacity factor greater than 20 for isophthalic acid; CCl2F2 had a capacity factor of 3.9. These results suggest that CCl2F2 has sufficient free energy of solvation to overcome the hydrogen bonds [14]. Even though CO2 ­ is the most extensively used mobile phase it is no more polar than hexane [15], so alternatives including CCl2F2 have been investigated, however the critical temperatures must not be too high as one of the main advantages of SFC is that elution can take place at mild temperatures. Another example is ammonia (NH3), as it possesses a high dipole moment and relatively low critical temperature, however supercritical NH3 reacts with siloxane linkages and when left for an extended time the siloxane stationary phase for capillary SFC breaks down too [14]. Therefore, a more useful way of eluting polar compounds is CO2  ­and the use of a modifier [15]. For packed SFC more or less all of the stationary phases used in HPLC are used in SFC, most of these are silica-based, chemically bonded or encapsulated, or polymeric [8]. Evaluation of stationary phases of SFC was originally carried out by Schoenmakers et al. this was however, only done using pure CO2 as the mobile phase, and certain phases did not perform well, if a modifier was used these phases would have performed better. When CO2 and a modifier is used as a mobile phase the stationary phase also becomes modified in that both CO2 ­ and the modifier adsorb onto the stationary phase. Depending on the stationary phase depends on the level of adsorption, for CO2 all phases adsorb the same but more polar phases adsorb more modifier than less polar phases. This causes the stationary phase to become more polar than the mobile phase, which in turn will cause polar solutes to interact more with stationary phase increasing retention time. Other stationary phases that have been studied include octadecylsiloxane-bonded silica (ODS), cyanopropylsiloxane- bonded silica, divinylbenzene-ODS, polydimethylsiloxane and porous graphitic carbon (PGC) stationary phases in supercritical [8]. In capillary SFC a problem arises in that normal GC stationary phases dissolve in the supercritical fluid mobile phase as they have a high solvating power. In order to correct the problem a non-extractable stationary phase is needed, examples of this are bonded phase where the stationary phase is attached to the column to surface groups via covalent bonds and cross linked phase where polymer chains within the stationary phase are attached to each other. In order to create non-extractable stationary phase, the process of coating must be undertaken, there are two types of coating, dynamic and static. The most favoured for SFC is static, as dynamic can lead to poor column efficiency and a thick stationary phase is not possible. In static coating the stationary phase is first dissolved in supercritical fluid and forced into the column, to avoid the removal of the phase cross link phase is used as it occurs between the polymers and not between polymer and substrate, and therefore can be applied to glass and fused silica columns [16]. Conclusion

Origin Of Species :: essays research papers

Considered one of the most significant, influential, and controversial publications in history, this book, I felt would be interesting to read and learn from. Although his content in this particular book is the subject of much controversy, Darwin's proffesional contributions and accomplishments will remain well known and respected. Therefore, I selected The Origin of Species believing that it would prove to be a stimulating and challenging reading experience. This famous book discusses in-depth many important aspects of the study of life. Darwin analyzes various issues including: creation, spontaneous generation, adaptaion, laws of organism variation, hybridism, and natural selection, all integral subjects in the science of biology. As I read this book, the magnitude of its importance became clear, and I learned a wealth of scientific information from the text that includes: geological succesion, morphology, and species variation. The convincing arguments and coherent evidence inhere nt in this great work induced subject retention and serious consideration of the topics that were comprehensively discussed. The theme of the nature of life (most importantly that of man) in The Origin of Species is still a subject of tremendous and continuing debate. Also, this important topic is related to a variety of current science events such as environentally concious efforts across the globe, the philosophy and science of "the survival of the fittest," and the popular studies of creation and evolution. I feel that this book is important to read because it is a publication which brilliantly discusses interesting and significant information, is often reffered to in scientific conversation and study, and defines perhaps the greatest debate of the Western World. Charles Darwin's engaging and pioneering analysis of flora and fauna calls into question the long-held and once widely accepted concepts of divine creation, spontaneous generation, and the unrelatedness of many species. Displaying original reasoning, he distinctly and defiantly challenges many ancient beliefs and makes an argument

Appendix G

Associate Program Material Appendix GWireless LAN Vulnerabilities MatrixComplete the following matrix by filling in the blank boxes in the table.Security protection Brief description Vulnerabilities Prevention (if any) MAC address filtering Only allows access to a device if its MAC address matches that of a pre-approved list on the router. MAC Spoofing Don’t rely on MAC filtering alone. Open system authentication (SSID beaconing) Disables SSID from being broadcast so wireless networks are harder to detect. A spectrum analyzer can still be used to find the network name. Create a more complex SSID and password settings in your APWEPStands for Wired Equivalency Privacy. Uses 64 bit or 128 bit encryption. (including 24-bit IV) In larger networks, IV’s can be duplicated and cause collisions, which are easy to detect by outside influences Use WPA2 with AES or similar instead on larger, enterprise deployments.Of the six categories of attackers, the one I would most want to bre ak into my network would be hackers, as they attempt to penetrate your network and expose vulnerabilities, then inform you of them. This is opposed to a cracker, which will do the same thing, only steal the data and attempt to sell it. A script kiddie is very dangerous, as they are generally under-experienced hackers and crackers who use someone else’s codes and almost always have malicious intent.Between MAC filtering, WEP, and authentication, I believe that WEP is the most secure of the three. MAC filtering can be easily overcome by MAC spoofing, and is not part of the 802.11 standard. Authentication is somewhat weaker than WEP, as someone could capture the cleartext challenge phrase and the encrypted response frame and gain access to the network. WEP is the strongest of the 3, but is still weak due to IV collisions which can be monitored and the hacker can recover the security key during those collisions.In fact, hackers can even cause massive IV collisions to speed up the process. It should be noted this is really only an issue on larger wireless networks as there are approximately 16 million IV’s that can be handed out. But in an enterprise application, 16 million can happen in a matter of hours or days.

Starbucks Paper

Starbucks Paper Starbucks Paper Starbucks Starbucks Coffee Corporation has become the most nationally recognized gourmet coffee company today. Every day, we go to work hoping to do two things: share great coffee with our friends and help make the world a little better.With the affordable hand crafted and personalized beverages a friendly warm and welcoming environment and speedy service for the most part, it has become a desired service for myself and so many other consumers. It isn’t just those things solely that have kept the company floating. It has been the evolution of their marketing and the continual development of new products that keep it alive and going. It has always been, and will always be, about quality. We’re passionate about ethically sourcing the finest coffee beans, roasting them with great care, and improving the lives of people who grow them. We care deeply about all of this; our work is never done. If you’ve ever noticed, Starbucks goes though near quarterly promotions of new product or â€Å"featured† beverages those come back seasonally such as the â€Å"Pumpkin Spice Latte†. Currently Starbucks celebrated their 40th year in business and definitely tricked it off in style. Using the concentration approach, the look of the interior of the stores uniformly rolled over to show off the new siren’s eye (logo). You found it on the new bags of the Tribute Blend Coffee, on the new coffee tumblers and other merchandise, on the paper cups, even on the sleeves. So walking out of the store with your beverage was like walking out in the world with something new, and it was appealing. In addition to the new logo everywhere, Starbucks rolled out with the new â€Å"petites† a line of bite size pastry items that through market segmentation, appeal to all. There are multiple target markets and I’ll explain them all: All of the â€Å"petites† are sold 2/$2.50- affordable, the cake pops definitely appeal to children, where the mini carro t cupcakes are a little more sophisticated for the adults, each item is under 200 calories so it appeals to the demographic that are attracted to the â€Å"skinny† (nonfat/ low calories/ sugar free beverages). Recycling is dependent on the availability of commercial recycling services where our stores are located. Unfortunately, some local communities that