Holes

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I have to go to either camp green lake or jail. Why couldn't my family be rich so I could just go to jail. I heard camp green lake is a very bad place to go to. I think that camp green isn't as bad as jail but I guess I'm going to find out. I don't have a choice anyways. So I'm going to camp green lake and that's final.


Now I'm on the way on the bus, the only passanger. After nine long hours just to get to camp green lake, I finally got there. The bus driver said to be carful. I didn't really know what the bus driver meant by that. At that time my thirst was killing me. When I got off all there was, was dry and hard dirt. Around me was some run downed buildings and some tents. Out in the back was a cabin under to tall trees.


I stepped into this office. I was happy there was air-conditioning. At that time I was very hot. There was a man with a cowboy hat and was wearing sunglasses. I got more thirsty because that guy had a can of soda in his hand. I was sorta realieved when he pulled two sodas out. I thought he was going to give one to me. The man gave one to the bus driver and one to a guard.


The man approached me and told me his name was mr. Sir. When mr. Sir told me that I'm not in girl scouts anymore, I felt that this wasn't going to go well. Mr. Sir told me to take off my clothes. I felt uncomfortable when he said that. I was told to take my clothes off because I might have something hiding. After mr. Sir checked me out he gave me two sets of clothes and a towel. Afterwards he gave me white shoes, a hat, and a canteen. When I got the canteen I thought there was water but once again there wasn't.


College papers on Holes


I left the office and went to go get dressed. The clothes smelled like soap to me. Mr. Sir said it would be smart if I wore one set to work and the other set for relaxation. He told me I were to do my laundry every three days. On that day my work clothes would be washed and the other set would be my work clothes.


I was told to dig one hole per day. Each hole was to be five feet deep and five feet across. My shovel was to be my measuring stick. I would be able to eat breakfast at 40 in the morning. If I ever found something interesting I was to report it to mr. Sir or any other counselor. When I finish digging the rest of the day is mine to do whatever. Mr. Sir afterwards explained to why there wasn't any guards, guard towers, fences, etc. He said if I were to run away he wouldn't stop me. I started to look at his gun. He said he wasn't goi ng to waste a bullet on me. He would shoot it at a yellow- spotted lizard. I was a little bit confused but then I told mr. Sir that I wasn;t going to run away. Then he said if I did there isn't no water until at least another 100 miles. Then mr. Sir asked me the question I was wating for. He asked me if I was thirsty, then I replied to him politely and said yes. Once again he didn't give me water. He said I better get used to it for the next eighteen months.


There were six large grey tents and each hada black letter on it. The were from letters A to F. The first five tents were for the campers. The counselors slept in the F tent. I was to sleep in the D tent.


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Airbus vs. Boeing in VLA market.

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I. INTRODUCTION


In December 000, Airbus formally committed to develop and launch a super jumbo plane known as the A80 at a launch cost of $1 billion. Prior to and after Airbus' commitment, Boeing started and canceled several initiatives aimed at developing a "stretch jumbo" with capacity in between its existing jumbo (the 747) and Airbus' planned super jumbo.


In addition to making the super jumbo one of the largest product launch decisions in corporate history, this figure represented 6% of total industry revenues in 000 ($45.6 billion) and more than 70% of Airbus' total revenues in 000. The inherent risk associated with this major strategic commitment is magnified by the fact that Airbus must spend the entire amount before it delivers the first plane. History has shown that many firms including General Dynamics, and, more recently, Lockheed, have failed as a result of attempting such bet-the-company product development efforts. If, however, the launch effort does succeed, Airbus is expected to dislodge Boeing as the market leader in commercial aircraft after more than 50 years of market dominance by the latter.


This paper presents an analysis of this new product commitment and, more generally, of competition in very large aircraft (VLA is defined as planes capable of seating more than 400 passengers).


II. CASE BACKGROUND


In the early 10s, Airbus and Boeing independently began to study the feasibility of launching a super jumbo. Both agreed there was a growing need for a super jumbo because of increasing congestion at major hubs. Alternative solutions were seen as either infeasible, in the case of greater flight frequency, or ineffective, in the case of flights to secondary airports. Fairly quickly they realized that there was room in the market for only one competitor.


Finally, Boeing and Airbus agreed to collaborate on a joint feasibility study for a Very Large Capacity Transport (VLCT) plane that could hold from 550 to 800 passengers. When the collaboration began in January 1, they envisioned the plane would cost $10 to $15 billion to develop (with estimates ranging from $5 to $0 billion) and would sell for $150 to $00 million each. Their preliminary demand estimate was reported to be 500 planes over the next 0 years.


In July 15, however, the collaboration ended. Airbus realized that Boeing's participation in the joint effort may have been only to stall the market so that Airbus did not develop anything itself. The two firms also disagreed at a very fundamental level about industry evolution. Boeing maintained that increased fragmentation in the form of point-to-point travel would solve the problem of congestion at major airports. Airbus, on the other hand, believed that hub-to-hub travel would continue to grow.


With the collaboration over, both competitors returned to independent study of the super jumbo market. For its part, Boeing considered two updated and "stretched" versions of its popular 747 jumbo jet. In fact, Boeing never formally announced it was going to develop the stretch jumbo yet did, in January 17, announce it was canceling the development effort. A little more than two years later, however, Boeing reversed course once again and now said it was going to build a stretch jumbo at a cost of $4 billion. The 747X-Stretch was supposed to hold up to 50 passengers and, according to Boeing, would be available by 004, two years ahead of Airbus' A80.


Concurrently, Airbus forged ahead with development of a super jumbo jet and finalized plans in 1 to offer a family of very large aircraft. The first model, the A80-100, would seat 555 passengers and second passenger model, the A80-00, would seat 650 passengers in the three-class configuration and up to 0 in an all-economy version. Airbus also planned to build a freighter version, the A80-800F, capable of carrying up to 150 tons of cargo. In terms of pricing, the A80's list price is significantly higher than the 747's list price, $0 million vs. $185 million. Developing the first passenger model and the freighter version of the super jumbo is expected to cost $1 billion.


Between June 000, when the Airbus supervisory board gave approval to begin marketing the plane, and December 000, airlines placed orders for 50 super jumbos and bought options on another 4 planes. With these orders in hand, including a number from important 747 customers such as Singapore Airlines and Qantas Airlines, the Airbus board officially launched the new plane. According to its internal projections, Airbus forecast a need for more than 1,500 planes of this size over the next 0 years, expected to capture up to half the market. In addition, Airbus estimates it will break even with sales of 50 planes (on an accounting, but not cash flow basis) and they currently have 100 firm orders and extra 100 options.


On March th, 001, Boeing announced it was stopping the development of its stretch jumbo and would begin development of a new aircraft known as the sonic cruiser (7E7). This plane would fly faster (Mach 0.5 vs. Mach 0.80), higher, and more quietly than existing aircraft. It would also be significantly smaller than the stretch jumbo (00 passengers vs. 50 passengers), though it would cost more to develop ($ billion vs. $4 billion). The sonic cruiser is not only more consistent with Boeing's predictions regarding industry evolution towards greater point-to-point travel, but also adds a third dimension speed to the capacity/range product space.


III. FINANCIAL MODELS


A Base case Go to Heaven.


To help us assess the valuation impact of various strategic actions in this sequence of competitor interactions, we built financial models of Airbus's super jumbo development project. We begin our reviews of these models with a projection of Airbus's investments in and returns from the super jumbo over a 0-year horizon. The model uses inputs from Airbus as well as from equity research reports on Airbus and EADS by analysts at Lehman-Brothers (LB), an industry consulting and data tracking service. All the data taken from the case are summarized in Appendix 1.


Before getting into the details of the model, two limitations are worth noting. First, this investment is incredibly complex and we have, by necessity, vastly simplified inputs to create a more tractable model. Second, many of the inputs are informed estimates because Airbus has released few details other than expected investment costs. Critical details surrounding pricing, volume, and funding remain shrouded in secrecy.


The discussion here focuses on the key assumptions of the model and the principal results. A first important assumption is that we estimate project value as of year-end 001. We also take into consideration that Airbus has spent $700 million on the plane by December 000 (Airbus Briefing, 000). Finally, we calculate the value accruing from years 1 to 1 (001 to 01) and did not use any terminal value.


In the base case, which is reproduced in Appendix , we assume Airbus will sell 50 planes per year in steady state after an initial ramp-up period (1 aircraft the first year, approximately 5% of production capacity then 8 for the second year which is approximately 75%) for a total of 750 planes by 01. This number is slightly less than its stated goal of capturing half the projected market for super jumbos (1/ 1,550 planes = 775 planes). By way of comparison, most analysts are predicting that Airbus will sell from 515 planes to 665 planes in their base case scenarios. More interestingly, Airbus' assumption exceeds the average number of 747's Boeing has sold over the past 0 years (4 planes per year).


We also assume the realized price in 008 will be $5 million, which will produce an operating margin of 5%. Also, analysts tend to assume that Boeing, a monopolist with more than 1,000 planes of cumulative production, has operating margins of 15% to 0% on its jumbo the 747.


Using a discount rate of %, these inputs imply a positive NPV of $1.1 million, consequently the IRR of the project is 10.47% which is higher than the discount rate. With respect to the break even point, we reach an accounting break even point (basic method applied by Airbus) at 4 aircraft sold, different than 50 announced by Airbus. On the other hand, if we improve the formula by taking into account commercial discounts or prices evolution, then we find a break even at 77 AC reached in 014.


B Pessimistic case Go to Hell.


If we stop our assumptions at the end of the first study, then the problem is solved we just have to launch the AXX!


The difficulty comes from the fact that the debate offers different opinions among specialists (economics, accountings…). Some say that this project is viable; others will say that Airbus made a big mistake.


Though we can think that people from Airbus thought twice before taking this decision, we decided to change assumptions linked to the future. Indeed, in 001, nobody can really know what the next years will bring to this industry. Moreover, in 001, AXX was not called A80 yet the project was just at its beginning, the studies were not mature which involves that design, performances or even investments linked to the dedicated tooling were not definitely frozen. All the data given in the case (Appendix 1) could be modified…just to see if Airbus was not a bit optimistic.


In this second study, we have taken 4 main assumptions.


The first one is based on demand which decreases significantly in 011 and 017. This is done to simulate either economic crises, either a new Boeing (7XX?) that come on the market, either the effect of terrorism.


The second one is about commercial discounts that have to be applied. The first 00 aircrafts will be discounted at 5%, as suggested in the case text and afterwards, each A/C will be discounted at 10 %.


The third assumption is about production costs. In 001, the industrial process wasnt defined at all and the aircraft definition was not either. All difficulties met due to the large volume of this A/C, the flexibility of parts or the tolerances concerns involved costly solutions sometimes. The assumption of increasing the production cost is therefore realistic


The fourth one is about Tax rate, which is increase every year in the financial model. All the assumptions about this study are summarized in Appendix .


The conclusion about this study could be catastrophic… The NPV found after 0 years was so negative the forecasted period has to be increased with 10 years. And even on a period of 0 years, the NPV is still negative. The basic break even does not change a lot in the method used by Airbus, as we find 0. But as this method does not take into account the real price paid by customers, the second one is more realistic facing the NPV results, as it gives a break even at 161 A/C!!!!


Some will think that this case is really pessimistic, but at the beginning of 001, who could have thought about September the 11th?


Moreover, Boeing has enough experience and resources to make a new A/C if it decides its reliable. Economic crises unfortunately also exist.


What is the good way of thinking between these extreme studies?


To help us taking the best decision as possible, we need to study the main parameters that have an influence on NPV to know their effects.


IV IMPACT OF VARIABLE DATA


This section analyzes the impact of variable data such as pricing, sales forecasts, production cost, additional investments and tax rates.


We assume that only one data changes while others remain same.


A- The key factors.


A-1) Pricing


Pricing in very large aircraft are of additional interest because pricing pressures drive the theoretical predictions that the entrant will introduce the new product (the super jumbo, in this case) and that intermediate products will be unprofitable for the incumbent.


It is useful to begin this examination of pricing by noting several basic facts about it. First, both Boeing and Airbus post list prices for their entire product lines. Boeing, for example, shows a price range for each aircraft on its corporate web site, where the range depends on the specific configuration. Second, both companies announce nominal changes to their price lists annually. Third, planes sell at large discounts to list prices, ranging from 18 40% for Boeing and 16-7% for Airbus and 5 to 40% for the first firm A80 orders placed.


With that background, several indicators of pricing pressure in the very large aircraft segment can be cited. Let start with Airbus' A80 which has a list price of $18-$40 million in 000. Given the 17-1% discount typical for the largest Airbus planes, the realized prices should be around $178-$187 million assuming a list price of $5 million. As it turns out, however, the early sales have occurred at prices as low as $15-$140 million or, in other words, essentially at "steady state" cost. While some of the early launch customers like Qantas and Virgin reportedly paid approximately $150 million per plane.


For instance (base on the current financial model enclosed in Appendix 1), if we assume that Airbus applies an average discount of only 5% on all its sales, then, we must wait until 08 to find a positive NPV for a total number of 1100 aircraft.


A-) Sales Forecasts


A--1) Demand Forecasts


The forecast of the demand is a key factor for the success of the A80 project; however, the demand can be deeply influenced by several external factors such as new entrant in the super jumbo market (e.g. Boeing) economic crisis, increase of fuel cost or, as we have recently experienced the dramatic effect of terrorism. To simplify our study, we will focus on the effect of the new comer on the VLA market.


Because large aircraft take years to design and develop, require enormous up-front investment, and have useful lives of over 0 years (some people think that the 747, for example, will have a useful life of 50-plus years), Airbus and Boeing both generate long-term demand projections for their products. Airbus's Global Market Forecast (GMF) is based on annual demand for new aircraft on each of 10,000 passenger routes linking almost 000 airports. In contrast, Boeing's Current Market Outlook (CMO) forecasts economic growth in 1 regions around the world and then uses these assumptions about growth to forecast traffic flows in 51 intra- and inter-regional markets.


Although both had decreased their growth forecasts in response to the Asian financial crisis in the late 10s, they disagreed sharply, however, about demand for the VLA segment due to their divergent view on industry evolution Boeing towards greater fragmentation and Airbus towards greater capacity planes. Table 1 summarizes their evolving 0-year forecasts regarding the number of VLA deliveries. Its most striking feature is the fact that Airbus' market forecasts have consistently been more than three times larger than Boeing's forecasts. And while both companies' forecasts fell in the late 10s, primarily because of the Asian crisis, Airbus' latest forecasts are down only 15% from their 17 high, compared to nearly 0% for Boeing's.


Table 1


0-Year Forecasts of the Number of VLA Deliveries


(Passenger Jets 500 seats only)


Boeing


CMO


Forecast Airbus


GMF


Forecast


15 n/a 174


16 n/a n/a


17 460 144


18 405 1


1 65 108


000 0 15


Source Boeing Current Market Outlook (CMO) and Airbus Global Market Forecast (GMF), various years.


The magnitude of the discrepancy is surprising given Boeing and Airbus's collaborative efforts in the early and mid 10s, a process that must have involved detailed discussion of different market forecasting techniques. It provides a sense of some of the ambiguities inherent in coming up with long-run demand forecasts for such products. And the direction of discrepancy is interesting, too Boeing's forecasts are lower than Airbus's, not the other way around.


Although Boeing's more pessimistic forecasts may represent its best estimate of future demand, an alternative interpretation is that they fulfill a strategic purpose. One possible purpose, more likely to have been important before Airbus committed to develop the A80, might have been to discourage entry by downplaying super jumbo demand. Additionally, perhaps, Boeing wanted to reinforce its point of view by signaling to third parties- investment analysts, investors, governments, customers, suppliers and even employees- that Boeing is acting responsibly in not launching a very large aircraft. Symmetrically, Airbus might be expected to overstate demand to make the case that it is acting responsibly in launching. Such signals of "taking care" tend to be most important in high-ambiguity environments. As a result, the possibility of strategic manipulation of forecasts understatement by Boeing, overstatement by Airbus merits mention, even though the statistical power with which it can be tested on its own (as opposed to in conjunction with other pieces of evidence) is limited.


Once again, if we compare the average sales of Boeing 747 over the last 0 years (4 aircraft per year) and if we apply this figure to our financial model from 010 then, we need to wait more then 10 years to find a positive NPV.


The demand is therefore a key factor for this study because its influenced by hypothetic competition, economic crises, political events, prices, terrorism etc…


A--) Production Capacity Forecasts


The demand forecast being a key factor, we chose to base our study on the sales forecast. Indeed, if demand is higher than production capacity, then some customers wont be able to be delivered their aircraft. Demand forecasts were therefore a necessary factor, but not enough to take into account Airbus production capacity. As a result, all is summarized in sale forecasts factor.


A-) Production costs


The assumption of the financial model is that the operating margin is 5%. However, if we refer to the operating margin estimated by Boeing on the 747s which is 15 to 0% then it has a consequence on the Airbus projection. For example, with a 15% operating margin, we need an additional 10 years of full production capacity to get a positive NPV. Even with a 0% operating margin (consistent with Lehman-Brothers estimate) an extra 6 years of full production/demand (we assume that Airbus sells all the aircraft produced) is needed to make the project viable.


As the operating margin is a direct consequence of the Aircraft price (which is taken into account) and the production cost, we chose to study the effect on production cost (that remains the same whatever the A/C price is, whereas the operating margin changes).


A-4) Investment expenditure


Increasing the R&D investment from $11 billion to $1 billion, an additional years of full capacity (150 aircraft) will be required to get a positive NPV with a total number of aircraft about 150…


Therefore, the investment expenditure is also a key factor, all the more as in 001, as the aircraft was not fully defined yet, the precise investment could not be definitely known.


A-5) Tax rate


The taxes paid on OPBT have an influence an NPV. Within the next 0 years, what will be their evolution? To make a rough estimate, the tax rate was defined as a linear function increasing from 8% every year.


B Study Between hell and heaven.


B-1) Process


Those key factor being defined, a third study was achieved in 5 parts. These 5 parts (.1 to .5) are released in Appendix 4.


The purpose of this study is to determine radar graphs that indicate areas defining the Heaven area where NPV0.


As these key factors consist of many other parameters, they had to be simplified by taking their average value, expressed in percentage increase relative to a reference value.


Each study changes one of these 5 parameters so that it can represent a bad situation for the project. As a result, the NPV decreases and becomes negative. During the study, the other parameters are adjusted so that they remain at an acceptable value for the project, until the NPV equals 0 (or be as close as possible from 0).


As a result, we obtain the limit value between Hell (NPV0) and Heaven (NPV0).


The radar graph is a tool that enables to measure the influence of changed parameters on the other ones, by defining the validity area o the project.


In fact, there are thousands and thousands of combination possible to design what we want to forecast, and therefore, there are many different possible curves.


B-) Limit of the process


The 5 studies were just an approach of this, but many more should have been made to have a more precise approach of the possible events and their consequences (nevertheless, the Excel sheet enables all possible combinations).


Moreover, as the key factors were simplified, their precision is lower. For example, the average sales number of aircraft does not take into account the sales distribution among the years. Additional studies therefore need to be made to compensate this lack of precision.


To be more efficient, the graphs need to be built on the same scale (which is not the case in this study due to the page size, to ensure maximum legibility).


B-) The main results.


The figure results are given in appendix 4 for each case (.1 to .5).


- Study .1 Average AC sales not optimistic.


- Study . Average Prices reduction not optimistic


- Study . Average Investments increase not optimistic


- Study .4 Average Production cost increase not optimistic


- Study .5 Average Tax rate increase not optimistic.


The main comparison between those cases can be made on the graphs and tables in appendix 4.


To summarize, comparison between those studies is given in the next table


Study Worst factor (Improved) break even Break even year Years forecasted


.1 AC sales 8 014 0


. Prices reduction 417 015 1


. Investments increase 8 014 1


.4 Production costs increase 515 017 0


.5 Tax rate increase 0 014 0


V - CONCLUSION


As a result, a first glance on the key factors demonstrates that individual extreme evolution of one factor doesnt kill the project for the next 0 or 1 next years.


The break evens change from 8 to 515 depending on the assumptions, and is reached between 014 and 017. Additional studies would probably add more precision on this.


The only factor that really causes difficulties is the AC production costs (study .4) for which NPV can just be positive after 0 years forecasted and AC prices increase.


But this parameter is linked to Airbus, not to the market. Its Airbus turn to find the right production process and ensure the correct design of the aircraft to optimize production costs, or to deal the best prices with subcontractors.


A company such as Airbus trusts in the knowledge of entities such as Design office and production and therefore, as executive management is influenced by this opinion about these entities, he probably thinks that production costs will be quickly reduced, as done on previous aircrafts.


Most of these parameters will never reach so extreme values, and all the more not at the same time. Additional simulations would demonstrate that if or factors tend to be pessimistic in the 0 or 0 years, as they would not reach so bad values, we could have a positive NPV after or 4 years.


This does not mean the project is not risky! But we can just take the assumption now that if things go reasonably wrong in the world in the 0 or 0 next years, this should not kill Airbus if the decision is taken to launch the program, moreover if governments estimate Airbus should not disappear…


As a conclusion, we decide to launch AXX.


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DSL Technologies

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DSL Technologies


DSL (Digital Subscriber Line or Digital Subscriber Loop. A technology that enables high-speed transmission of digital data over regular copper telephone lines. DSL works by using more of the capacity of the phone line. Voice and traditional modems work by modulating a signal in a limited range of frequencies (thousands of cycles); broadband sends a digital signal over a wide frequency (millions of cycles). The accelerated growth of content rich applications and online gaming, which demand high bandwidth, has changed the nature of information networks. High-speed communication is now an ordinary requirement throughout business, government, academic, and home office environments. Internet access, telecommuting, and remote LAN access are three of the clearly defined services that network access providers are offering now. These rapidly growing applications are placing a new level of demand on the telephone infrastructure. In particular, the local loop portion of the network (i.e., the local connection from the subscriber to the local central office) has become a challenge for telephone companies. Historically, this local loop facility has been provisioned with copper cabling which cannot easily support high bandwidth transmission. This environment is now being stressed by the demand for increasingly higher bandwidth capacities. Although this infrastructure could be replaced by a massive rollout of fiber technologies, the cost to do so would be insupportable in today's business models and, more importantly, the time to accomplish such a transition is unacceptable because the market demand exists today! Telephone companies are already faced with growing competition and unprecedented customer demands a new category of companies, Internet Service Providers (ISPs), has emerged in this market as providers of data services. Traditionally ISPs have used the telephone company infrastructure. However, thanks to deregulation, they now have direct access to the physical cable. xDSL has the ability to meet the customer demand for high bandwidth right now, at costs that make sense. xDSL is a group of emerging Digital Subscriber Line (DSL) modem technologies for supporting high-rate traffic transmission over POTS lines. X stands for asymmetric in ADSL, rate adaptive in RADSL, high-speed in HDSL, and very high speed in VDSL. xDSL delivers Broadband over Copper the best thing about xDSL technologies is their ability to transport large amounts of information across existing copper telephone lines. This is possible because xDSL modems leverage signal processing techniques that insert and extract more digital data onto analog lines. The key is modulation, a process in which one signal modifies the property of another. ADSL Development and Deployment Progress Of all the emerging xDSL technologies, ADSL is receiving the most attention because there is a standard (DMT) for it, and its capabilities provide NSPs with a competitive offering to cable modems. But there is increasing interest in symmetrical xDSL offerings such as HDSL and SDSL. As a local access service, ADSL's implementation has no critical drawbacks. It can be deployed as an overlay network where there is subscriber demand, eliminating the need for NSPs to risk building out their infrastructure unnecessarily in the hope that the technology will catch on. ADSL development and deployment is focused primarily in North America, followed by northern Europe and the Pacific Rim. In North America, US West, GTE, Ameritech, SBC, BellSouth, and Edmonton Tel (Canada) are the service providers leading the current wave of ADSL/xDSL deployment. Covad, Northpoint, and a handful of other CLECs are entering high-density metropolitan areas—typically offering a portfolio of xDSL offerings at different classes of service and price points, and competing with incumbent local exchange carriers. Chicago-based InterAccess was the first ISP to offer ADSL. Telia (Sweden), Telenor (Norway), British Telecom (UK), and Telfonica (Spain) are leading xDSL proponents in Europe. In the Pacific Rim, Telstra (Australia), Hong Kong Telecom, and Singtel (Singapore) are deploying xDSL for data and video applications. ADSL modems have been tested successfully by more than 40 telephone companies, and close to 50,000 lines have been installed in various technology trials and commercial deployments. Increasingly, alternative service providers such as enterprises, multi-tenant building owners, hospitality businesses (hotels and resorts), and office park developers are offering or considering offering ADSL to their users as private network operators. Applications In early 90's xDSL technologies were tested by some of the regional Bell operating companies in the United States, as well as several European telephone companies. At that time, the driving applications behind xDSL were video on demand (VOD) and interactive TV (ITV). Those applications were seen as potentially explosive sources of revenue growth for the residential market. In 1995, interest shifted toward the online world and more specifically the World Wide Web. The increasing demand for bandwidth with which to access the Web is one of the primary applications at which xDSL technologies are now targeted. However, xDSL technologies are also being looked at in conjunction with several other applications. These applications may produce a far greater revenue stream in near future compared to broadband Web access for residential market. Listed below are just a few examples of how xDSL technology can be utilized: Internet/Intranet Access Intranet access for organizations that are standardizing on a Web based, client server model is one of primary xDSL applications. An organization that has implemented an Intranet will require higher bandwidth afforded by xDSL in order to link their remote offices and telecommuters to the more demanding business oriented applications running on their private Web servers. LAN-to-LAN Connectivity xDSL technologies have the potential to prove far more effective in low cost, high throughput, LAN to LAN connectivity than ISDN or traditional leased lines. Frame Relay Access Since xDSL operates at the physical layer, it could emerge as the most cost effective method of carrying frame relay traffic from the service subscribers to the frame relay network. ATM Network Access As with frame relay the xDSL technologies can also be used to carry ATM cells to an ATM access device, where they are statistically multiplexed over an ATM backbone. XDSL Types Digital Subscriber Line, or DSL, is fundamentally another name for an ISDN-BRI channel operating at the Basic Rate Interface with two 64 kbps switched channels and one 16 kbps packet switching and signaling channel. This circuit can carry both voice and data in both directions at the same time. xDSL refers to those various arrangements in which advanced modulating techniques are imposed onto the local channel in order to derive higher throughput in one or both directions. The various types of xDSL are described in the following paragraphs. HDSL High-bit-rate Digital Subscriber Line (HDSL) derives its name from the high bandwidth that is transmitted in both directions over two copper loops. HDSL has proven to be a reliable and cost effective means for providing repeater-less T1 and E1 services over two twisted pair loops. This proven technology has already resulted in the deployment of over 300,000 HDSL equipped circuits throughout the local access infrastructure. HDSL transceivers can reliably transmit a 2.048 Mbps data signal over two non-loaded, 24 gauge (0.5mm), unconditioned twisted wire pair loops at a distance of up to 13 kft (4.2 km) without the need for repeaters. Eliminating the need for repeater equipment and removal of bridged taps significantly simplifies the labor and engineering effort to provision the service. This attribute eliminates the need to identify, modify, and verify a controlled environment, with power, secured access, and other factors needed to support repeater equipment. It also reduces the time, cost, and effort of isolating faults and taking corrective action when a failure does occur. Studies by some service providers have indicated that trouble shooting and replacing defective repeater equipment often costs significantly more than the cost of the equipment itself. These attributes translate into increased network up time and reduced engineering time; making possible T1 provisioning in a matter of days, as opposed to weeks. Faster service provisioning and greater up time leads to increased customer satisfaction and increased service revenues. To provision a 12 kft (3.6 km) local loop with traditional T1 transmission equipment requires two transceivers and two repeaters. To provision the same loop with HDSL, requires only two HDSL transceivers, one at each end of a line. S-HDSL/SDSL Single-pair or Symmetric High-bit-rate Digital Subscriber Line (S-HDSL/SDSL) operate on a single copper pair as opposed to the traditional two pair HDSL described above. S-HDSL/SDSL allows easy implementation of applications that require symmetric data rates on a single local loop while maintaining the existing POTS on the same loop. Because only one pair is needed in this arrangement, the capacity of the entire local loop infrastructure is greatly magnified. With this capability, local providers can extract the maximum value from their existing plant, or deploy new capacities both more quickly and at a lower capital expenditure. This allows for rapid and cost effective deployment of intermediate data rate services. Potential uses for this technology include fractional T1 with a particular advantage in 768 kbps systems, Home Office, LAN Access, Distance Learning, Internet Access, and Campus or Large Facility LAN to LAN connectivity. Since S-HDSL/SDSL can be implemented with and without POTS and at multiple data rates, it can have different capacity and reach limitations. This allows for easy, cost effective implementation of such services as remote cell site support of PCs, remote LAN access, distance education and training, digital imaging, or any other service which requires a larger amount of bandwidth. ADSL Probably the most common xDSL type is Asymmetric Digital Subscriber, which takes its name from the comparatively high bandwidth in one direction, with low bandwidth in the opposite direction. ADSL uses a single phone line for transmission. Many service providers have also come to recognize its potential to support a range of data applications. Additionally, ADSL's ability to operate at speeds of up to 6 Mbps positions it to support real time broadcast services and pre-recorded interactive video services; and to have multiple video and data activities underway simultaneously. ADSL supports applications with asymmetric traffic demands such as: • Web Surfing, • File Downloads, • Distance Learning. RADSL Rate Adaptive Digital Subscriber Line (RADSL) is a simple extension of ADSL used to encompass and support a wide variety of data rates depending on the line's transmission characteristics. This is advantageous in situations in which there is a lower bandwidth demand and in situations in which the line quality is less than needed for full bandwidth implementations. VDSL Very High-bit-rate Digital Subscriber Line (VDSL) provides very high bandwidth asymmetrically (up to 52 Mbps in one direction and 2 Mbps in the other) to businesses and residences with broadband access requirements over a Fiber-To-The-Curb (FTTC) network. Within the FTTC architecture, VDSL will address the last section of copper cabling to the subscriber premises. Typical distance and implementation of VDSL is 1 km @ 26 Mbps. Unfortunately, this type of xDSL is not very common because of lack of FTTC networks available today. xDSL Technology (how it works) XDSL signals are designed to maximize the rate of transmission of digital signals through non loaded twisted pairs, making use of bandwidths that can be greater than 1MHz, much greater than the 3000Hz or so allocated for voice transmission. There are several types of xDSL signal in commercial use today. Each signal type is implemented in circuitry with accompanying software, called a transceiver. The transceiver design includes the encoding or modulation scheme along with decoding or demodulation applied to convert serial binary data streams into a form suitable for transmission through twisted wire pairs. The transceivers may also employ various signal processing, equalization, amplification, and shaping techniques to adapt transmission for physical attenuation and phase distortions experienced by signals transmitted through twisted wire pairs. The transceiver software and circuitry may also use coding techniques to detect and correct noise that is present on a twisted wire pair. A variety of signal processing techniques have been developed over the past10 years to increase the bit rate of digital transmission through telephone loop twisted pairs. The following sections will describe these technologies. 2B1Q The DSL acronym was first used as shorthand to refer to the line code designed to support basic rate integrated services digital network (ISDN) transmission through twisted wire pair loops. The ISDN basic rate signal is required to carry an information payload of 144kbps, consisting of two "B" channels of 64kbps each and one packet data or "D" channel of 16kbps added for framing, error detection, and other overhead functions. The ISDN line of "U" interface operates at a raw data rate of 160kbps. In the mid 1980's the T1 committee in the United States created a standard U interface using a four-level line code referred to as 2B1Q for two binary bits per symbol carried by a quaternary symbol design. 2B1Q line code was designed to support ISDN transmission through loops of 18000ft or less, meeting voltage pulses of +/- 875V and +/- 2.625V. The symbol rate is 80000 baud and the energy spectrum used by ISDN peaks at 40000Hz. The ISDN signal is transmitted in full duplex mode, bi-directional on the same pair of wires. In order to accomplish this, transceivers must contain a hybrid function to separate the two directions of transmission. To help the receiver differentiate between far-end transmission and reflections of near-end transmission from irregularities in the twisted pair transmission line due to wire gauge changes and bridged taps, echo cancellation techniques are used. The range of operation of ISDN is dictated by both attenuation and self near-end cross talk (NEXT) from adjacent 2B1Q ISDN signals. The 2B1Q line code is sometimes referred to as a base band signal because it uses energy in frequencies down to zero, overlapping with the voice frequency band. In order to carry voice through a DSL, the voice signal is digitized using PCM techniques and carried in one of the B channels. In ISDN applications the D channel is reserved for data packets that are primarily used for call processing. In carrying simultaneous voice and data the ISDN basic rate line carries a maximum of 64kbps of data. In the absence of voice, both B channels may be bonded together to increase the data capacity to 128kbps. Both ends of an ISDN connection must use the same bonding protocol. ISDN connections are made by dialed access though a local digital switch that also terminates voice lines. QAM Quadrature Amplitude Modulation (QAM) utilizes amplitude and phase modulation to transmit multiple bits per baud. Unmodulated signal exhibits only two possible states allowing us only to transmit a zero or a one. With QAM, it is possible to transmit many more bits per state, as there are many more states. This scheme utilizes a signal that can be synthesized by summing amplitude modulated cosine and sine waves. These two components, being 90 deg out of phase, are called quadrature, hence the name Quadrature Amplitude Modulation. By combining amplitude and phase modulation of a carrier signal, we can increase the number of states and thereby transmit more bits per every state change. CAP Carrierless amplitude and phase (CAP) modulation technique is closely related to QAM in that amplitude and phase are used to represent the binary signal. The difference between CAP and QAM lies in the state representation of the constellation pattern. CAP does not use a carrier signal to represent the phase and amplitude changes. Rather, two waveforms are used to encode the bits. The encoder replaces a stream of digital data with a complex equation that symbolizes a point on the constellation diagram. Thus, for a 32-CAP, there would be 32 possible locations on the diagram, all of which can be represented as a vector consisting of real and imaginary coordinates. Consequently, 32-CAP would result in 32 distinct equations of the type, each one representing five bits of data. CAP modulation is very suitable for use with ADSL. DMT The spectrum from 0 to 4 kHz, voice band, is designated for plain old telephone services (POTS). Downstream (ATU-C to ATU-R), the spectrum from 26 kHz to 1.1 MHz is further divided into 249 discrete channels. Upstream (ATU-R to ATU-C), the spectrum above the POTS band consists of 25 channels between 26 kHz and 138 kHz. Echo canceling between the downstream and upstream signals permits reuse of these sub-channels. With the exception of carriers used for timing, each carrier is capable of carrying data. However, only those carriers with sufficient signal to noise ratio (SNR) are allocated payload for transmission. Each transmitting carrier is allotted a bit count and transmits power, based on the characteristics of the sub-channel. This results in an optimized data transfer rate for the current line conditions. DMT allocates bits and transmission power away from the induced noise. The advantages of this process are an optimized data rate and less interference with other services existing in the same sheath, due to the symmetrical nature of induced crosstalk. The DMT technique exhibits a high degree of spectral compatibility based on power spectral density, rather than absolute transmit power. DMT has a substantial advantage over single carrier modulation systems in the presence of impulse noise. DMT spreads impulses over a large number of bits, averaging peaks. Only if the average exceeds the margin does DMT produce an error -- single carrier systems will error every time a peak exceeds the margin. DWMT Discrete wavelet multitone (DWMT) technology increases the usable capacity of telephone wires and coaxial cable, allowing telephone companies and cable operators to deliver two-way broadband telecommunications services over their existing networks. DWMT uses Multicarrier Modulation. A multicarrier system uses a transmission band efficiently by dividing it into hundreds of sub channels that are totally independent and spectrally isolated. In practice, implementations of multicarrier systems use orthogonal digital transformations on blocks of data, a process called subchannelization, in an attempt to achieve the frequency partitioning shown in the figure below. By keeping the signal sub channel power contained in a narrow bandwidth, each sub channel occupies only a small fraction of the total transmission band and overlaps only with immediately adjacent sub channels. When a signal is transmitted over a long copper loop (e.g. several miles), the higher frequency components of the signal attenuate significantly more (tens of dB) than the lower frequency components. Narrowband interferers from AM or amateur radio signals also affect the transmission by destroying the signal in parts of the band. Multicarrier technology, called Discrete Wavelet Multitone (DWMT), provides sub channel isolation that is superior to DMT. DWMT uses an advanced digital wavelet transform instead of the Fourier transform used in DMT. Echo Cancellation The T1.413 standard for ADSL defines two categories of modems: frequency division multiplex (FDM) modems (Category I) and echo cancellation modems (Category II). FDM systems allocate separate frequency bands for upstream and downstream transmissions. Echo canceled systems send upstream and downstream signal over the same frequencies. Since the attenuation of a signal over a copper line increases with frequency, it is desirable to transmit data using a frequency band that is as low as possible. In an ADSL system, the lowest attenuated frequencies begin right after the POTS band. In FDM system, the lower frequency band is used for upstream transmission while the downstream transmissions are allocated to the higher attenuated frequencies. Some xDSL transceivers use echo cancellation (similar to the echo cancellation utilized in the standard V.34 28.8kbps duplex modem) to exploit the lower attenuated frequencies and increase its downstream performance. By utilizing the lower frequencies for both upstream and downstream performance, the transceiver can deliver higher downstream performance, particularly on the longer loops where the higher frequencies become severely attenuated. In an effort to promote interoperability between FDM and EC systems, the echo-canceled transceivers can be configured to operate in an FDM mode in order to communicate with a category I (FDM) modem. Conclusion the twisted pair wires between the telephone central office and end users of telecommunication services has a great deal more information capacity than used for the regular voice services. Several base band and pass band transmission systems collectively referred to as xDSL, have been developed over the last ten years that enable up to several megabits per second of data to be carried over the regular telephone twisted pair line. The xDSL family of technologies provides a wide variety of line driving schemes to accomplish and satisfy different market needs over today's infrastructure. xDSL has application in both the corporate and residential environments as well as flexibility to meet the market challenges. Since xDSL operates at the physical layer of OSI seven layers standard, it can be used in conjunction with ATM and Frame Relay technology. The most promising of the xDSL technologies for integrated Internet access, intranet access, remote LAN access, video-on-demand, and lifeline POTS applications in the near term is ADSL or R-ADSL (a rate-adaptive version of ADSL). During the past year, ADSL has concluded trials by more than 40 network service providers throughout the world, primarily in North America and northern Europe. Service introduction began in 1997, but ADSL service is still being rolled out in many areas. In the meantime, xDSL technologies and standards will continue to evolve, as will user demand for these emerging services relative to other local access service alternatives. The ability to utilize the existing telephone copper wire infrastructure as well as interoperability with ATM and Frame Relay technology, position xDSL as the most promising of the broadband access technology options for both residential and business users.


Bibliography


Bibliography: 1. Marlis Humphrey and John Freeman, "How XDSL Supports Broadband Services to the Home", IEEE Network., vol. 11, no. 1, Jan-Feb 1997, p. 14-23. 2. George T. Hawley, "Systems Considerations for the use of XDSL Technology for Data Access", IEEE Communication, vol. 35, no. 3, Mar 1997, p. 56-60. 3. Bhumip Khasnabish, "Broadband to the Home (BTTH): Architectures, Access Methods, and the Appetite for it", IEEE Communication, vol. 35, no. 3, Mar 1997, p. 58-69 4. ADSL Forum website , www.adsl.com 5. Analog Devices website, www.analog.com 6. Kimo website, www.kimo.com 7. Westell website, www.westell.com 8. www.encyclopediatech.com.


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Solar

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Major Issues Although there are numerous problems facing SDI and its leadership (short on capital, insufficient and inefficient production, poor marketing, etc.), these "symptoms" are a reflection of management's lack of business knowledge, engineering knowledge, and an overall lack of strategic direction.


Industry Definition For the purpose of this analysis, SDI is assumed to be in the bird feeder industry. More specifically, the company is in the strategic group that concentrates on high-end, squirrel resistant bird feeders.


Driving Forces (1) Increase in the number of bird watchers (growing market), () geographic influence bird watchers seem to be concentrating in certain areas, () Technological advancements in bird feeder design.


KSF's (1) Functionality (Resist squirrels/feed birds), () lawn appeal, () quality, (4) price also seems to be an issue.


SWOT Analysis of The Solar Feeder.


Strengths


1. Award-winning product innovation


. Aesthetically appealing product relative to its competition (lawn appeal)


. Very positive, enthusiastic organizational culture


Weaknesses


1. Lack of money


. Lack of management know-how and vision


. Production is inefficient resulting in long delivery delays and a product that is too expensive for the market.


Opportunities


1. There are investors with sufficient capital interested in investing in SDI.


. The market for birdwatchers is growing rapidly


. There are untapped distribution channels that could expose more potential customers


Threats


1. Demand of the product is seasonal.


. The industry has Low barriers to entry.


. There are a number of groups, including much of SDI's target market, that are sensitive to how animals (including squirrels) are treated.


Alternatives


1. Outsource SDI manufacturing


+ Increase the level of expertise in this vital function


+ Efficiency increase could lower cost of goods sold allowing price decrease


+ Free SDI management to concentrate on raising capital and marketing the product


Lose control of a vital function


Requires a great deal of coordination because of the tight technical tolerances


Possibility of technology being leaked once it is "out of house"


Requires capital that SDI does not presently possess


. License SDI technology to a more established company in the industry.


+ Plays to SDI's core competency (anti-squirrel technology)


+ Frees management from responsibilities for which they are obviously ill-prepared


+ They may actually MAKE money from their invention


Loss of control in all business decisions (depending on how the license is written up)


May be difficult to locate a suitable, interested partner


. Develop mission, vision, and strategic business plan.


+ Provides direction to a directionless organization


+ Satisfy potential investors' desire for business plan, thereby increasing capital available to finance business


+ Improve business knowledge of SDI manages


May not possess the expertise to do this without outside help


Time is of the essence and strategic planning takes time


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Causes of World War 1

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Europe in modern times has always been faced with the problem of war, and this war was bound to erupt sooner or later. Many events and countries have contributed to the outbreak which has now led to what authorities are calling "The First World War." No one has ever seen such brutality, such devastation.


The war which has broken out this summer of 114 is unlike any previous conflict. But its hard to believe that a war so big has only 5 main participants Britain, France, Russia, Germany and Austria - Hungary. European countries have failed to develop ways of settling their differences and living together in peace. The formation of rival alliances and the adoption of a policy of militarism have been the outcomes from the countries being driven apart by things such as nationalism and economic rivalry.


In the late 1th and early 0th century, two opposing alliances were formed in the most powerful nation of Europe. Conflict between them grew, ensuring that the conditions of war were present, a lot earlier than when soldiers went into action in 114.


After a victory in war against France in 1871, the German Empire was formed. The ruler of Germany from 1888, Kaiser Wilhelm II, was determined to turn his empire into a world power. In order to do so, he built up Germany's industry and its armed forces. In particular, a new navy was to be created by the Kaiser, which would rival Britain's fleet. Tension grew rapidly between the two nations as a result of this arms race.


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Germany joined Austria - Hungary and Italy in 188 to form the Triple Alliance which created three allies known as the Central Powers. They agrees to help each other in the event of enemy attack. The alliance's most powerful member was Germany, with Italy being the weakest and anxious to avoid a war as they had become a united kingdom and the Austro - Hungarian Empire was crumbling.


In the early 0th century, Britain was a great industrial nation with a worldwide empire, with the country's main protector being its strong navy, therefore the army was small and not compulsory. Britain kept a close eye on Germany's military build up to preserve its own position of power in nothern Europe.


After being defeated in the Franco - Prussian War, France lost provinces of Alsace and Lorraine to Germany, which was a great blow to national pride. The French vowed to win them back. In 104, Britain and France (with its Anti - German feelings) formed the Entente Cordiale.


From 184, the Russian Empire was ruled by Tsar Nicholas II, but its army was poorly equipped and they had no desire for war. They were compelled, however, to support the Serbs against Austria - Hungary.


107 came and another alliance was formed - The Russians, Britain and France formed the Triple Entente. This now meant that the Triple Alliance faced potential enemies to east and west. War now seamed likely... Germany believed it was inevitable.


Archduke Franz Ferinand was heir to the throne of Austria - Hungary and in June, 114, made an official visit to the city of Sarajevo in Bosnia - Herzegovina with his believed wife Sophie accompanying him. The events that took place that day finally plunged the world into a full scale world war.


Bosnia - Herzegovina had been an official part of the Austro - Hungarian Empire since 108. The Serbians and Slavs believed that their nation should be part of the neighboring Slav state of Serbia. Some people were prepared to use violence to gain independence from the Austro - Hungarian Empire - including members of a secret society known as the Black Hand.


As part of the Black hands campaign for independence they planned to assassinate the Archduke. Although 6 of the men failed, the 7th, a 10 year old, shot and killed both Franz Ferinand and his wife. Their deaths brought political crisis to Europe.


Austria - Hungary decided to take a firm stand against Serbia of whom they believed had supported this act of terrorism. The emperor of Austria - Hungary got the assurance that the Kaiser would come to their aid if war broke out and on rd July, he sent Serbia an ultimatum.


The ultimatum contained many demands. All organisations in Serbia that were plotting against Austria - Hungary were to be stopped. When Serbia replied on 5th July, it agreed to most of the demands and none were rejected outright.


However, this was too late. Austria - Hungary has already decided war was necessary. War was declared at 11.10am on 8th July 114.


The systems of alliances began to operate at once. At the present moment Germany is backing Austria - Hungary, although Italy is remaining neutral. Russia has sided with the Serbs and France is backing Russia, its partner in the Triple Entente.


We have a report from a young soldier fighting for Germany who managed to briefly talk to our reporters.. "When we set off for France this month, we expected an easy victory and a rapid return home. We were told the trip would be an "Excursion to Paris." But there is little to none truth in that. The world is in chaos and there is no one to point the finger at, no one to blame. If only it were that easy..." Anonymous


If only it were that easy... Everyone is to blame for this war, we only hope it won't take as long to end as it took to start.


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