WorldWideScience

Sample records for airline seat inventory

  1. Marginal revenue transformation in airline seat inventory control with two fare families and two markets

    DEFF Research Database (Denmark)

    Kallehauge, Brian

    This paper considers the single-leg airline seat inventory control problem with fare classes divided into two fare families and demand for the fare classes segmented into two markets. The main contribution of this paper is that the seat inventory control problem is solved using the marginal revenue....... The reason for considering a two-market and two-family seat inventory control problem is the objective of airlines such as SAS and Air Canada to serve both the business and leisure market while at the same time controlling sell-up behavior in the undifferentiated fare. A fare family is defined by a set...

  2. Airline seat inventory control benefiting from currency differentials to enhance revenues

    Directory of Open Access Journals (Sweden)

    C.E. Love

    2003-12-01

    Full Text Available The purpose of this paper is to develop an airline seat inventory control model which will capitalise on currency differentials that exist between city pairs. The approach taken here is to maximise Expected Marginal Seat Revenues as proposed by Belobaba for non-nested fare classes. the basic Expected Marginal Seat Revenue model is extended to explicitly include the effects of overbooking. Data from the South African Airways return flight between Cape Town and London is utilised to demonstrate the model.

  3. Airline Seat Inventory Control Modeling under Overbooking%考虑超售的航空客运舱位控制模型

    Institute of Scientific and Technical Information of China (English)

    高强; 刘玮; 朱金福

    2011-01-01

    本文研究航空运输收益管理的舱位控制在超售情况下的静态建模问题.通过将机票销售过程模拟成排队过程,以收益最大化为目标函数,首先给出了单等级票价下的超售水平公式.然后将该思路推广到多等级票价情况,应用动态规划方法建立了一种舱位控制静态模型,由该模型推导出了各等级舱位最优订座限制的决策方程.最后分析了一个实例以说明决策方程的应用.%The seat inventory control under overbooking for airline revenue management was studied in this paper. Firstly, a simple overbooking equation was given for single-class seat inventory flight, with seat reservation process simulated as queuing process and maximized flight revenue as objective function. Then the idea was extended to multi-class seat inventory situation by using dynamic program to build up static model of seat inventory control. Furthermore, optimal seat reservation decision equations of each level seat inventory were obtained. Finally, an instance was analyzed to show the utilization of the decision equations.

  4. Multi-leg Seat Inventory Control Based on EMSU and Virtual Bucket

    OpenAIRE

    Wei Fan; Jianwei Wang; Ip, W. H.

    2014-01-01

    Expected marginal seat revenue (EMSR) is a well-known method for airline seat inventory control airlines. However, this method employs a static model to study the dynamic reservation process, and does not take into account the risk tolerance of policy makers. Expected marginal seat utility (EMSU) replaces revenue by utility, which addresses the real situation of seat inventory control. However, there is still a lack of multi-leg seat control algorithms based on EMSU. Therefore, using EMSU and...

  5. Multi-leg Seat Inventory Control Based on EMSU and Virtual Bucket

    Directory of Open Access Journals (Sweden)

    Wei Fan

    2014-01-01

    Full Text Available Expected marginal seat revenue (EMSR is a well-known method for airline seat inventory control airlines. However, this method employs a static model to study the dynamic reservation process, and does not take into account the risk tolerance of policy makers. Expected marginal seat utility (EMSU replaces revenue by utility, which addresses the real situation of seat inventory control. However, there is still a lack of multi-leg seat control algorithms based on EMSU. Therefore, using EMSU and bucket algorithms, this paper applies the Markov decision-making process to simulate the flight reservation process and builds a dynamic multi-leg seat inventory control model. Experimental results validate the effectiveness of the proposed method.

  6. 41 CFR 301-10.117 - May I keep compensation an airline gives me for voluntarily vacating my seat on my scheduled...

    Science.gov (United States)

    2010-07-01

    ... an airline gives me for voluntarily vacating my seat on my scheduled airline flight when the airline... compensation an airline gives me for voluntarily vacating my seat on my scheduled airline flight when the airline asks for volunteers? Yes: (a) If voluntarily vacating your seat will not interfere with...

  7. Seat inventory control methods for Chinese passenger railways

    Institute of Scientific and Technical Information of China (English)

    包云; 刘军; 马敏书; 孟令云

    2014-01-01

    Railway seat inventory control strategies play a crucial role in the growth of profit and train load factor. The railway passenger seat inventory control problem in China was addressed. Chinese passenger railway operation features and seat inventory control practice were analyzed firstly. A dynamic demand forecasting method was introduced to forecast the coming demand in a ticket booking period. By clustering, passengers’ historical ticket bookings were used to forecast the demand to come in a ticket booking period with least squares support vector machine. Three seat inventory control methods:non-nested booking limits, nested booking limits and bid-price control, were modeled under a single-fare class. Different seat inventory control methods were compared with the same demand based on ticket booking data of Train T15 from Beijing West to Guangzhou. The result shows that the dynamic non-nested booking limits control method performs the best, which gives railway operators evidence to adjust the remaining capacity in a ticket booking period.

  8. 41 CFR 301-10.116 - What must I do with compensation an airline gives me if it denies me a seat on a plane?

    Science.gov (United States)

    2010-07-01

    ... compensation an airline gives me if it denies me a seat on a plane? 301-10.116 Section 301-10.116 Public... plane? If you are performing official travel and a carrier denies you a confirmed reserved seat on a plane, you must give your agency any payment you receive for liquidated damages. You must ensure...

  9. Modeling energy absorption in commercial airline seating with MADYMO dynamic simulation

    NARCIS (Netherlands)

    Pruitt, D.; Muller, D.W.; Marshall, R.; Altamore, P.

    1999-01-01

    Dynamic testing of aircraft seats has been incorporated to enhance the survivability of aircraft mishaps for over 10 years. This standard may be introduced into aircraft with certification basis prior to this introduction if seat loads can be limited to the structural capabilities of the seat track.

  10. AIRLINE INFORMATION

    Institute of Scientific and Technical Information of China (English)

    2006-01-01

    Austrian Airlines QUALITY AND SERVICE KEY TO SUCCESS Austrian Airlines has been making continuous efforts to provide more comfort and convenience to travelers. In business class, a new sleeper seat with a back adjustable up to 90 degrees was recently introduced. In addition, wireless Internet connection is now available throuqhout the cabin, on the ground

  11. A heuristic to minimize the inventory value of repairable parts with service constraints: Application to an airline company

    Directory of Open Access Journals (Sweden)

    Manuel Cardós

    2013-07-01

    Full Text Available Purpose: This paper focuses on the improvement of the inventory management of repairable parts of the airline company Air Nostrum. The company uses a common sales replacement policy to manage their repairable parts and the same target fill rate for every item. This target is very high in order to assure a high availability of the aircrafts, dealing also to a high inventory value. Design/methodology/approach: However, this paper shows that an alternative heuristic approach outperforms the previous one terms of inventory value while fulfilling the target fill rate. Findings and Originality/value: This improvement is illustrated with an extensive and real dataset and may lead to a significant inventory reduction. Originality/value: Therefore, a company can design its inventory policies applying this heuristic focused on inventory reduction with a service level constraint instead of the usual cost optimization or service level fulfillment.

  12. Private Airlines Take Off

    Institute of Scientific and Technical Information of China (English)

    ISABELDING

    2005-01-01

    OKAY Airways, the first wholly private airline in China, took off from the Tianjin Binhai International Airport on March Ⅱ. Carrying a total of 80 passengers, the 189-seat Boeing 737-900 leased from Korea Airlines was bound for Kunming, capital of Yunnan Province, via Changsha,

  13. A Dynamic Optimization Research of Flight Seat Inventory Control Based on the Hub and Spoke Route Network%基于轮辐式航线网络的航班舱位控制动态优化

    Institute of Scientific and Technical Information of China (English)

    高金敏; 乐美龙

    2015-01-01

    To keep the seat inventory control closer to actual passenger reservation demand , and effectively improve airline revenue , a dynamic optimization model of seat inventory control is established based on the characteristics of the hub and spoke route network , from the perspective of practical operation , considering demand uncertainty and dynamics at the same time .The random arrival passenger number of different res-ervation phases is obtained by simulation , the number of seats to protect each flight segment is obtained by using genetic algorithm , and the nested grade is obtained according to the fare value .The running results show that this method can increase the total revenue by 2 .35%compared with the method using genetic al-gorithm only .It has certain reference significance .%为使航班舱位控制更贴近旅客实际订座需求,有效提高航空公司收益,基于轮辐式航线网络结构的特点,从航班实际运行的角度出发,同时考虑需求的不确定性以及动态性,建立舱位控制动态优化模型。通过模拟仿真得到各订座阶段旅客随机到达数量,运用遗传算法求得各航班舱位等级的座位保护数,根据票价价值进行等级嵌套。结果表明,该方法与单独使用遗传算法的舱位控制方法相比较,能将总收益提高2.35%,具有一定的参考意义。

  14. AIRLINE INFORMATION

    Institute of Scientific and Technical Information of China (English)

    2010-01-01

    Turkish Airlines Turkish Airlines and Spanair recently signed a code-share agreement enabling Turkish Airlines to use its code "TK" on domestic flights operated by Spanair. Reciprocally, on Turkish Airlines’ flights to Barcelona, Madrid and

  15. AIRLINE INFORMATION

    Institute of Scientific and Technical Information of China (English)

    2006-01-01

    Austrian Airlines Austrian Airlines Group has announced the appointment of Heinz Goetz as new Country Manager China. Goetz, a veteran airline industry operative, joined Austrian Airlines in 1977. He held management positions in Austria and abroad prior to his most recent appointment as Country

  16. Airline Revenue Management with Shifting Capacity

    OpenAIRE

    2003-01-01

    Airline revenue management is the practice of controlling the booking requests such that the planes are filled with the most profitable passengers. In revenue management the capacities of the business and economy class sections of the plane are traditionally considered to be fixed and distinct capacities. In this paper, we give up this notion and instead consider the use of convertible seats. A row of these seats can be converted from business class seats to economy class seats and vice versa...

  17. Continental Airlines Installs New Audio/Video on Demand Entertainment Systems on International Routes Also increases the number of in-seat power ports on Boeing 757s

    Institute of Scientific and Technical Information of China (English)

    2007-01-01

    @@ Continental Airlines announced on Jan. 8 that it has completed the installation of Audio/Video on Demand (AVOD) in the BusinessFirst cabins of its entire fleet of 41 Boeing 757 aircraft used primarily on transatlantic flights to/from its New York hub at Newark Liberty International Airport. AVOD systems will be installed in the economic cabins of these aircraft beginning summer 2007.

  18. AIRLINE INFORMATION

    Institute of Scientific and Technical Information of China (English)

    2008-01-01

    Qatar Airlines Teams Up With Langham Hotels International Qatar Airlines has recently inked an agree- ment with Langham Hotels International.Accordingly, Qatar Airlines will of- fer QMiles to members of the hotel’s advantage program who visit any hotels of Langham Hotels International.

  19. AIRLINE INFORMATION

    Institute of Scientific and Technical Information of China (English)

    2006-01-01

    Qatar Airways Award-winning Qatar Airways boosted its tally of international honors by grabbing four key titles at the prestigious 13th World Travel Awards during a glittering ceremony in the Caribbean islands of the Turks and Caicos. The Doha-based airline picked up awards for the World’s Leading Business Class Airline, World’s Leading Airline Inflight Meal Service, Leading Airline in the Middle East as well as Leading Middle East Business Class Airline. The airline gained high praise at the travel industry’s equivalent to the Oscar’s and triumphed as the Leading Airline in the Middle East. It gained the inflight meal service award for the second year in a row.

  20. Introducing explus, United Airlines' Regional Jet Redefined

    Institute of Scientific and Technical Information of China (English)

    2005-01-01

    @@ United Airlines (OTCBB:UALAQ.OB) unveiled the new explusSM brand - a United Express service featuring state-of-the-art Embraer-170 (70-seat) and Canadair RJ-700(66-seat) regional jets, which provide the luxurious services to the passengers.

  1. Singapore Airlines Unveils the World's Best Flying Experience

    Institute of Scientific and Technical Information of China (English)

    Guo Yan

    2006-01-01

    @@ Recently, Singapore Airlines launched its latest suite of cabin products designed to deliver the most luxurious and stylish travel experiences. The suite of products and services include new Singapore Airlines First, Business and Economy Class seats,the next generation Kris World inflight entertainment system and an enhanced service delivery. These next generation products will set new standards of excellence for premium air travel, and reinforce the Airline's product leadership in the airline industry.

  2. AIRLINE INFORMATION

    Institute of Scientific and Technical Information of China (English)

    2006-01-01

    United Airlines United Airlines and Shanghai Airlines signed a code-sharing agreement on March 21 that expands international destination options and frequent flyer opportunities for customers of both carriers. Pending U.S. Government approval, the 11 code-sharing flights covered by the agreement are scheduled to commence May 15. Once the agreement takes effect, customers from both carriers will be able to accrue and redeem frequent flyer miles and enjoy airport lounges supported by both carriers.

  3. AIRLINE INFORMATION

    Institute of Scientific and Technical Information of China (English)

    2009-01-01

    United Airlines In celebration of the first anniversary of the Approved Destination Status (ADS) agreement between China and the United States, United Airlines, the world’s largest transpacific airline, offers travelers in China an unique trip to its home, Chicago, with a special month-long promotion. Beginning June 1, the special promotional offer will give visitors the chance to take in the Windy City

  4. AIRLINE INFORMATION

    Institute of Scientific and Technical Information of China (English)

    2009-01-01

    Turkish Airlines Turkish Airlines released its consolidated financial statements for the first nine months of 2009 on the Istanbul Stock Exchange. According to the reported financial statements, sales revenue was $3.26 billion, a decrease of 11 percent year on year

  5. AIRLINE INFORMATION

    Institute of Scientific and Technical Information of China (English)

    2008-01-01

    Air Berlin Air Berlin is the second largest German airline and the fourth largest airline in Europe. It was founded in 1978 and has been enjoying steady growth ever since. Its route network includes major international cities and holiday destinations, as well

  6. 基于乘客分类的航空客运座位控制和动态定价综合模型%Optimal seating control and dynamic pricing for airline tickets with passenger segment

    Institute of Scientific and Technical Information of China (English)

    李豪; 熊中楷; 屈卫东; XIONG Yu

    2011-01-01

    航空公司以提供折扣票的方式将乘客分为两类,并通过动态的控制折扣票的销售和对普通票实行动态定价来最大化自身的期望收益.应用动态规划建立相应的座位控制和动态定价综合模型,讨论了收益函数及最优定价策略的结构性质,并求得了航空公司基于已卖出的机票数量接受或拒绝乘客购买折扣票的阈值,以及对乘客购买普通票的最优定价所满足的关系式.最后,通过算例讨论了不同参数对最优策略的影响,并分析了模型的有效性.%The airline divides the passengers into two categories by offering discount tickets, and needs to decide how to control the sales of discount tickets, how to implement dynamic pricing for ordinary tickets.We introduce a model which integrates pricing and capacity allocation using dynamic programming. Solutions and corresponding properties are discussed. We also obtain the optimal allocation of seating which is achieved by the total number of selling units and discuss the relationship of the optimal price strategy.Numerical experiments are presented to explore the effect of various parameters on the performance of optimal strategy and show the effectiveness of the model.

  7. AIRLINE INFORMATION

    Institute of Scientific and Technical Information of China (English)

    2006-01-01

    Qatar Airways Award-winning Qatar Airways has become the first airline in the world to introduce live digital satellite TV beamed direct to every passenger on their individual seatback TV systems at 35,000 feet. Yet another first for one of the world's fastest growing airlines is the introduction of a system offering a multitude of European and Middle East TV channels on five of its fleet of Airbus A330 long-haul aircraft.

  8. Airline Promotions

    Institute of Scientific and Technical Information of China (English)

    2004-01-01

    Austrian Airlines is extending its network in China. From June onwards,the number of direct flights from Beijing to Vienna will rise from the current four to six per week, operated by Airbus A33oAs of April 29th, Shanghai will be added to the flight program, seeing three nonstop flights from Vienna a week, operated by Boeing B-767

  9. Airline Quality Rating 2007

    OpenAIRE

    Bowen, Brent D.; Headley, Dean E.

    2007-01-01

    The Airline Quality Rating (AQR) was developed and first announced in early 1991 as an objective method for assessing airline quality on combined multiple performance criteria. This current report, the Airline Quality Rating 2007, reflects monthly Airline Quality Rating scores for calendar year 2006. AQR scores for 2006 are based on 15 elements in four major areas that focus on airline performance aspects important to air travel consumers. The Airline Quality Rating 2007 is a summary of mo...

  10. Airline Quality Rating 2005

    OpenAIRE

    Bowen, Brent D.; Headley, Dean E.

    2005-01-01

    The Airline Quality Rating (AQR) was developed and first announced in early 1991 as an objective method for assessing airline quality on combined multiple performance criteria. This current report, the Airline Quality Rating 2005, reflects monthly Airline Quality Rating scores for 2004. AQR scores for the calendar year 2004 are based on 15 elements in four major areas that focus on airline performance aspects important to air travel consumers. The Airline Quality Rating 2005 is a summary o...

  11. Airline Quality Rating 2013

    OpenAIRE

    Bowen, Brent D.; Headley, Dean E.

    2013-01-01

    The Airline Quality Rating (AQR) was developed and first announced in early 1991 as an objective method for assessing airline quality on combined multiple performance criteria. This current report, the Airline Quality Rating 2013, reflects monthly Airline Quality Rating scores for calendar year 2012. AQR scores for 2013 are based on 15 elements in four major areas that focus on airline performance aspects important to air travel consumers over the calendar year of 2012. The Airline Quality...

  12. Airline Quality Rating 2011

    OpenAIRE

    Bowen, Brent D.; Headley, Dean E.

    2011-01-01

    The Airline Quality Rating (AQR) was developed and first announced in early 1991 as an objective method for assessing airline quality on combined multiple performance criteria. This current report, the Airline Quality Rating 2011, reflects monthly Airline Quality Rating scores for calendar year 2010. AQR scores for 2010 are based on 15 elements in four major areas that focus on airline performance aspects important to air travel consumers. The Airline Quality Rating 2011 is a summary of mo...

  13. Airline Quality Rating 2010

    OpenAIRE

    Bowen, Brent D.; Headley, Dean E.

    2010-01-01

    The Airline Quality Rating (AQR) was developed and first announced in early 1991 as an objective method for assessing airline quality on combined multiple performance criteria. This current report, the Airline Quality Rating 2010, reflects monthly Airline Quality Rating scores for calendar year 2009. AQR scores for 2009 are based on 15 elements in four major areas that focus on airline performance aspects important to air travel consumers. The Airline Quality Rating 2010 is a summary of mo...

  14. Airline Quality Rating 2003

    OpenAIRE

    Bowen, Brent D.; Headley, Dean E.

    2003-01-01

    The Airline Quality Rating (AQR) was developed and first announced in early 1991 as an objective method of comparing airline quality on combined multiple performance criteria. This current report, the Airline Quality Rating 2003, reflects monthly Airline Quality Rating scores for 2002. AQR scores for the calendar year 2002 are based on 15 elements that focus on airline performance areas important to air travel consumers. The Airline Quality Rating 2003 is a summary of month-by-month qualit...

  15. Airline Quality Rating 2002

    OpenAIRE

    Bowen, Brent D.; Headley, Dean E.

    2002-01-01

    The Airline Quality Rating (AQR) was developed and first announced in early 1991 as an objective method of comparing airline quality on combined multiple performance criteria. This current report, Airline Quality Rating 2002, reflects monthly Airline Quality Rating scores for 2001. AQR scores for the calendar year 2001 are based on 15 elements that focus on airline performance areas important to air travel consumers. The Airline Quality Rating 2002 is a summary of month-by-month quality ra...

  16. Airline Quality Rating 2012

    OpenAIRE

    Bowen, Brent D.; Headley, Dean E.

    2012-01-01

    The Airline Quality Rating (AQR) was developed and first announced in early 1991 as an objective method for assessing airline quality on combined multiple performance criteria. This current report, the Airline Quality Rating 2012, reflects monthly Airline Quality Rating scores for calendar year 2011. AQR scores for 2011 are based on 15 elements in four major areas that focus on airline performance aspects important to air travel consumers. The Airline Quality Rating 2012 is a summary of mo...

  17. Airline Quality Rating 2001

    OpenAIRE

    Bowen, Brent D.; Headley, Dean E.

    2001-01-01

    The Airline Quality Rating (AQR) was developed and first announced in early 1991 as an objective method of comparing airline quality on combined multiple performance criteria. This current report, Airline Quality Rating 2001, reflects monthly Airline Quality Rating scores for 2000. AQR scores for the calendar year 2000 are based on 15 elements that focus on airline performance areas important to air travel consumers. The Airline Quality Rating 2001 is a summary of month-by-month quality ra...

  18. Airline Quality Rating 2004

    OpenAIRE

    Bowen, Brent D.; Headley, Dean E.

    2004-01-01

    The Airline Quality Rating (AQR) was developed and first announced in early 1991 as an objective method of comparing airline quality on combined multiple performance criteria. This current report, the Airline Quality Rating 2004, reflects monthly Airline Quality Rating scores for 2003. AQR scores for the calendar year 2003 are based on 15 elements in four major areas that focus on airline performance aspects important to air travel consumers. The Airline Quality Rating 2004 is a summary of...

  19. Airline Quality Rating 2008

    OpenAIRE

    Bowen, Brent D.; Headley, Dean E.

    2008-01-01

    The Airline Quality Rating (AQR) was developed and first announced in early 1991 as an objective method for assessing airline quality on combined multiple performance criteria. This current report, the Airline Quality Rating 2008, reflects monthly Airline Quality Rating scores for calendar year 2007. AQR socres for 2007 are based on 15 elements in four major areas that focus on airline performance aspects important to air travel consumers. The Airline Quality Rating 2008 is a summary of mo...

  20. Airline Quality Rating 2006

    OpenAIRE

    Bowen, Brent D.; Headley, Dean E.

    2006-01-01

    The Airline Quality Rating (AQR) was developed and first announced in early 1991 as an objective method for assessing airline quality on combined multiple performance criteria. This current report, the Airline Quality Rating 2006, reflects monthly Airline Quality Rating scores for calendar year 2005. AQR scores for 2005 are based on 15 elements in four major areas that focus on airline performance aspects important to air travel consumers. The Airline Quality Rating 2006 is a summary of mo...

  1. Airline Quality Rating 2009

    OpenAIRE

    Bowen, Brent D.

    2009-01-01

    The Airline Quality Rating (AQR) was developed and first announced in early 1991 as an objective method for assessing airline quality on combined multiple performance criteria. This current report, the Airline Quality Rating 2009, reflects monthly Airline Quality Rating scores for calendar year 2008. AQR scores for 2008 are based on 15 elements in four major areas that focus on airline performance aspects important to air travel consumers. The Airline Quality Rating 2009 is a summary of mo...

  2. Airline Quality Rating 2015

    OpenAIRE

    Bowen, Brent D.; Headley, Dean E.

    2015-01-01

    Take the 2015 Airline Passenger Survey The Airline Quality Rating (AQR) was developed and first announced in early 1991 as an objective method for assessing airline quality on combined multiple performance criteria. This current report, the Airline Quality Rating 2015, reflects monthly Airline Quality Rating scores for calendar year 2014. AQR scores for 2015 are based on 15 elements in four major areas that focus on airline performance aspects important to air travel consumers over the c...

  3. Persistence on airline accidents.

    OpenAIRE

    L. A. GIL-ALANA; Barros, C.P. (Carlos P.); J.R. Faria

    2009-01-01

    This paper analyses airline accidents data from 1927-2006. The fractional integration methodology is adopted. It is shown that airline accidents are persistent and (fractionally) cointegrated with airline traffic. Thus, there exists an equilibrium relation between air accidents and airline traffic, with the effect of the shocks to that relationship disappearing in the long run. Policy implications are derived for countering accidents events.

  4. Persistence in Airline Accidents

    OpenAIRE

    Carlos Pestana Barros; João Ricardo Faria; Luis A. Gil-Alana

    2008-01-01

    This paper analyses airline accident data from 1927-2006, through fractional integration. It is shown that airline accidents are persistent and (fractionally) cointegrated with airline traffic. There exists a negative relation between air accidents and airline traffic, with the effect of the shocks to that relationship disappearing in the long run. Policy implications are derived for countering accident events.

  5. Airline Quality Rating 1997

    OpenAIRE

    Bowen, Brent D.; Headley, Dean E.

    1997-01-01

    The Airline Quality Rating (AQR) was developed and first announced in early 1991 as an objective method of comparing airline performance on combined multiple factors important to consumers. Development history and calculation details for the AQR rating system are detailed in The Airline Quality Rating issued in April, 1991, by the National Institute for Aviation Research at Wichita State University. This current report, Airline Quality Rating 1997, contains monthly Airline Quality Rating scor...

  6. Airline Quality Rating 1998

    OpenAIRE

    Bowen, Brent D.; Headley, Dean E.

    1998-01-01

    The Airline Quality Rating (AQR) was developed and first announced in early 1991 as an objective method of comparing airline performance on combined multiple factors important to consumers. Development history and calculation details for the AQR rating system are detailed in The Airline Quality Rating issued in April, 1991, by the National Institute for Aviation Research at Wichita State University. This current report, Airline Quality Rating 1998, contains monthly Airline Quality Rating scor...

  7. Airline Quality Rating 1996

    OpenAIRE

    Bowen, Brent D.; Headley, Dean E.

    1996-01-01

    The Airline Quality Rating (AQR) was developed and first announced in early 1991 as an objective method of comparing airline performance on combined multiple factors important to consumers. Development history and calculation details for the AQR rating system are detailed in The Airline Quality Rating issued in April, 1991, by the National Institute for Aviation Research at Wichita State University. This current report, Airline Quality Rating 1996, contains monthly Airline Quality Rating scor...

  8. Esindusteenuseid pakub Airline Management

    Index Scriptorium Estoniae

    2007-01-01

    Lennufirmadele ja teistele turismivaldkonna ettevõtetele esindusteenuseid pakkuvast firmast Airline Management OÜ. Firma poolt Eestis esindatud lennufirmade Air Namibia, SN Brussels Airlines ja Flynordic ning hotelligrupi Wyndham lühitutvustus

  9. Airline Quality Rating 1993

    OpenAIRE

    Bowen, Brent D.; Headley, Dean E.

    1993-01-01

    The Airline Quality Rating was developed and first announced in early 1991 as an objective method of comparing airline performance on combined multiple factors important to consumers. Development history and calculation details for AQR rating system are detailed in The Airline Quality Rating (NIAR Report 91-11) issued in April, 1991, by the National Institute for Aviation Research at Wichita State University. A full reporting of the 12 month period of 1991 Airline Quality Rating scores is ava...

  10. Airline Quality Rating 1995

    OpenAIRE

    Bowen, Brent D.; Headley, Dean E.

    1995-01-01

    The Airline Quality Rating (AQR) was developed and first announced in early 1991 as an objective method of comparing airline performance on combined multiple factors important to consumers. Development history and calculation details for the AQR rating system are detailed in The Airline Quality Rating (NIAR Report 91-11) issued in April, 1991, by the National Institute for Aviation Research at Wichita State University. This current report, Airline Quality Rating 1995, (NIAR Report 95-11), con...

  11. Overbooking Airline Flights.

    Science.gov (United States)

    Austin, Joe Dan

    1982-01-01

    The problems involved in making reservations for airline flights is discussed in creating a mathematical model designed to maximize an airline's income. One issue not considered in the model is any public relations problem the airline may have. The model does take into account the issue of denied boarding compensation. (MP)

  12. The Seat

    Institute of Scientific and Technical Information of China (English)

    米国勇; 张国宝(英译)

    2012-01-01

    One night, the huge statue of the Buddha, as tall as two meters, fell suddenly from its seat and broke in pieces. But two smaller statues on either of his sides, Gold Boy and Jade Girl, still remained intact.

  13. Airlines 2.0

    OpenAIRE

    Hvass, Kristian A.; Munar, Ana María

    2014-01-01

    Over the years online marketing has grown in importance in the airline industry. This media space offers airlines numerous marketing tools, one of the most recent being social media. Social media allows airlines to interact directly with customers via various Internet platforms, and monitor customer opinions and evaluations of services. This exploratory paper studies airlines’ use of social media on Facebook and Twitter for a defined period of time. The paper analyses the content of social me...

  14. Airline Quality Rating 1991

    OpenAIRE

    Bowen, Brent D.; Headley, Dean E.; Luedtke, Jacqueline R.

    1991-01-01

    In today's competitive airline industry, it's crucial that an airline do all it can to attract and retain customers. One of the best ways to do this is by offering a quality service to consumers. Perceptions of service quality vary from person to person, but an enduring element of service quality is the consistent achievement of customer satisfaction. The satisfying of customer service needs keeps them loyal and helps establish a base for new customers. An Airline Quality Rating scale is p...

  15. Airline Quality Rating 1994

    OpenAIRE

    Bowen, Brent D.; Headley, Dean E.

    1994-01-01

    The Airline Quality Rating was developed and first announced in early 1991 as an objective method of comparing airlien performance on combined multiple factors inportant to consumers. Development history and calculation details for the AQR rating system are detailed in The Airline Quality Rating (NIAR Report 91-11) issued in April, 1991, by the National Institute for Aviation Reserach at Wichita State University. A full reporting of the monthly Airline Quality Rating scores for 1991 and 1992 ...

  16. Airline Operation Center Workstation

    Data.gov (United States)

    Department of Transportation — The Airline Operation Center Workstation (AOC Workstation) represents equipment available to users of the National Airspace system, outside of the FAA, that enables...

  17. Persistence of airline accidents.

    Science.gov (United States)

    Barros, Carlos Pestana; Faria, Joao Ricardo; Gil-Alana, Luis Alberiko

    2010-10-01

    This paper expands on air travel accident research by examining the relationship between air travel accidents and airline traffic or volume in the period from 1927-2006. The theoretical model is based on a representative airline company that aims to maximise its profits, and it utilises a fractional integration approach in order to determine whether there is a persistent pattern over time with respect to air accidents and air traffic. Furthermore, the paper analyses how airline accidents are related to traffic using a fractional cointegration approach. It finds that airline accidents are persistent and that a (non-stationary) fractional cointegration relationship exists between total airline accidents and airline passengers, airline miles and airline revenues, with shocks that affect the long-run equilibrium disappearing in the very long term. Moreover, this relation is negative, which might be due to the fact that air travel is becoming safer and there is greater competition in the airline industry. Policy implications are derived for countering accident events, based on competition and regulation. PMID:20618386

  18. Identification and analysis of explanatory variables for a multi-factor productivity model of passenger airlines

    Directory of Open Access Journals (Sweden)

    Antonio Henriques de Araújo Jr

    2011-05-01

    Full Text Available The paper aimed to identify and analyze the explanatory variables for airlines productivity during 2000 2005, by testing the Pearson correlation between the single factor productivity capital, energy and labor of a sample of 45 selected international airlines (4 Brazilian carriers among them and their productivity explanatory variables like medium stage length, aircraft load factor, hours flown and cruise speed for selected routes besides aircraft seat configuration and airlines number of employees. The research demonstrated, that a set of variables can explain differences in productivity for passenger airlines, such as: investment in personnel training processes, automation, airplane seat density, occupation of aircraft, average flight stage length, density and extension of routes, among others.

  19. airline revenue management

    OpenAIRE

    Pak, K; Piersma, Nanda

    2002-01-01

    textabstractWith the increasing interest in decision support systems and the continuous advance of computer science, revenue management is a discipline which has received a great deal of interest in recent years. Although revenue management has seen many new applications throughout the years, the main focus of research continues to be the airline industry. Ever since Littlewood (1972) first proposed a solution method for the airline revenue management problem, a variety of solution methods ha...

  20. airline revenue management

    OpenAIRE

    2002-01-01

    With the increasing interest in decision support systems and the continuous advance of computer science, revenue management is a discipline which has received a great deal of interest in recent years. Although revenue management has seen many new applications throughout the years, the main focus of research continues to be the airline industry. Ever since Littlewood (1972) first proposed a solution method for the airline revenue management problem, a variety of solution methods have been intr...

  1. Airline Price Discrimination

    OpenAIRE

    Stacey, Brian

    2015-01-01

    Price discrimination enjoys a long history in the airline industry. Borenstein (1989) discusses price discrimination through frequent flyer programs from 1985 as related to the Piedmont-US Air merger, price discrimination strategies have grown in size and scope since then. From Saturday stay over requirements to varying costs based on time of purchase, the airline industry is uniquely situated to enjoy the fruits of price discrimination.

  2. Impact Of Employee Motivation On Customer Satisfaction: Study Of Airline Industry In Pakistan

    OpenAIRE

    Ahmed, Muhammad Bilal; Wasey, Ejaz; Jhanndir, Saif Ullah

    2012-01-01

    Employees are the most important factor in the success and failure of any organization. The airline industry is a service industry that sells seats to its passengers therefore employees motivation towards their job plays a very important role in serving the customer’s needs. This study focuses on the impact of employee motivation and its components e.g. work environment, pay and benefits, management systems and organizational vision on customer satisfaction in the airline industry of Pakistan...

  3. Single-leg airline revenue management with overbooking

    OpenAIRE

    Aydın, Nursen; Aydin, Nursen; Birbil, Ş. İlker; Birbil, S. Ilker; Frenk, Hans; Noyan, Nilay

    2013-01-01

    Airline revenue management is about identifying the maximum revenue seat allocation policies. Since a major loss in revenue results from cancellations and no-show passengers, over the years overbooking has received a significant attention in the literature. In this study, we propose new models for static and dynamic single-leg overbooking problems. In the static case, we introduce computationally tractable models that give upper and lower bounds for the optimal expected revenue. In the dynami...

  4. 75 FR 45562 - Enhancing Airline Passenger Protections

    Science.gov (United States)

    2010-08-03

    ... International (ACI), Association of Asia Pacific Airlines (AAPA), Association of European Airlines (AEA), Latin American & Caribbean Air Transport Association (ALTA), National Airlines Council of Canada (NACC... extension of the comment period by the Air Transport Association (ATA), Regional Airline Association...

  5. Improving Airline Safety

    Science.gov (United States)

    1998-01-01

    Under a NASA-Ames Space Act Agreement, Coryphaeus Software and Simauthor, Inc., developed an Aviation Performance Measuring System (APMS). This software, developed for the aerospace and airline industry, enables the replay of Digital Flight Data Recorder (DFDR) data in a flexible, user-configurable, real-time, high fidelity 3D (three dimensional) environment.

  6. Executive airlines management

    OpenAIRE

    Šášinka, Štěpán

    2012-01-01

    The bachelor thesis deals with a management of executive operators in the business aviation sector. Two main parts create the main body of the thesis. At first, there is a theoretical part, also called literature overview. In this chapter, aviation history, management history and basic information about management and aviation management is described. The second part – practical, comprises information about executive airlines and their management in the Czech Republic. Comparison of executive...

  7. Robustness of airline route networks

    Science.gov (United States)

    Lordan, Oriol; Sallan, Jose M.; Escorihuela, Nuria; Gonzalez-Prieto, David

    2016-03-01

    Airlines shape their route network by defining their routes through supply and demand considerations, paying little attention to network performance indicators, such as network robustness. However, the collapse of an airline network can produce high financial costs for the airline and all its geographical area of influence. The aim of this study is to analyze the topology and robustness of the network route of airlines following Low Cost Carriers (LCCs) and Full Service Carriers (FSCs) business models. Results show that FSC hubs are more central than LCC bases in their route network. As a result, LCC route networks are more robust than FSC networks.

  8. Economic analysis of spider web airline networks

    Institute of Scientific and Technical Information of China (English)

    Wen-dong Yang; Jin-fu Zhu; Qiang Gao; Wen-fang Wang

    2009-01-01

    The distinct network organization, management, service and operating characteristics of US Southwest Airlines are key elements of its success compared with other airlines. As a network organization type, the spider web airline network has received more attention. In this paper, we analyzed the relation between the spider web airline network and spider web, and the structure of spider web airline network, built the assignment model of the spider web airline network,and investigated the economics concerned.

  9. Numerical prediction of seating position in car seats

    NARCIS (Netherlands)

    Hoof, J.F.A.M. van; Markwijk, R. van; Verver, M.M.; Furtado, R.; Pewinsky, W.

    2004-01-01

    Two of the main design objectives for car interiors are comfort and safety. These aspects are both determined by the seating position of the occupant. Seat manufacturers use the SAE Three-Dimensional H-Point Machine™ to measure seating positions to design, audit, and benchmark seats. The seating pos

  10. Seating arrangement in Althingi

    Directory of Open Access Journals (Sweden)

    Þorsteinn Magnússon

    2014-12-01

    Full Text Available Almost a century has passed since Althingi, the Parliament of Iceland, introduced, in 1916, the method of allocating seats to Members by drawing lots at the start of each session. This arrangement is not customary in any other national parliament in the world. It has never been established why this particular method of allocating seats was introduced in Althingi. Neither has it been mapped out how the allocation was conducted, what the Members thought of it nor what impact, if any, the arrangement had on the relations of Members and the workings of Althingi. This article therefore presents the first study of this subject in Iceland. The article also places the seat allocation procedure of Althingi in an international context, as the general rule in parliaments around the world is that Members are seated together in parliamentary party groups. The conclusions of the study are, among other things, that the seat allocation by lot was probably modelled on the House of Representatives of the United States Congress, where seats were allocated by lot from 1845-1913. The study also reveals that over 40 years passed until seat allocation by lot became fully established procedure in Althingi. In the Upper House seats were not allocated by lot at the great majority of sessions until 1959 and Members appear to have been mainly seated along party lines. In the Lower House it was common for some Members to exchange seats following the drawing of lots, and for some time attempts were made to introduce seating by parliamentary party, but the efforts were unsuccessful due to insufficient support. Since 1959 there has not been any disagreement regarding the drawing of lots for seats. Generally speaking, Members appear to hold the opinion that the seating arrangement in Althingi has a positive impact on personal relations, is a positive counterbalance to the division of Members into government supporters and opposition members and that the allocation of seats by

  11. Seated postural hypotension.

    Science.gov (United States)

    Gorelik, Oleg; Cohen, Natan

    2015-12-01

    Most studies of postural hypotension (PH) have focused on standing PH. Less is known about PH after transition from a supine to sitting position. Moreover, seated PH has not been previously reviewed in the English literature. The aim of this review was to provide current information regarding seating-induced PH. Seventeen studies were reviewed regarding prevalence, methods of evaluation, manifestations, predisposing factors, prognosis, and management of seated PH. Prevalence ranged from 8% among community-dwelling persons to 56% in elderly hospitalized patients. Dizziness and palpitations were the most frequent symptoms. Of a variety of factors that have been identified as predisposing and contributing to seated PH, aging, bed rest, and hypertension were most important. Because seated PH is a common, easily diagnosable and frequently symptomatic condition, especially in elderly inpatients, this disorder warrants attention. Moreover, seating-induced falls in blood pressure and the associated symptoms, may be largely prevented by nonpharmacologic interventions. PMID:26515671

  12. Introduction Latent Variables for Estimating Airline Assessment

    OpenAIRE

    Hashem Salarzadeh Jenatabadi

    2013-01-01

    This paper focuses on the application of latent variables in assessing airline performance. There is a gap in literature of airline performance modelling. This paper, based on latent variable model attempts to introduce a new framework for airline assessment modelling. In this regard, organisational assessment was used as theoretical framework. Four constructs and thirteen measurements are illustrated for airline assessment model.

  13. Food irradiation and airline catering

    International Nuclear Information System (INIS)

    Food poisoning from contaminated airline food can produce serious consequences for airline crew and passengers and can hazard flight. While irradiation of certain foodstuffs has been practised in a number of countries for some years, application of the process has not been made to complete meals. This paper considers the advantages, technical considerations, costs and possible application to airline meals. In addition, the need to educate the public in the advantages of the process in the wake of incidents such as Chernobyl is discussed

  14. Airline Operations Aid

    Science.gov (United States)

    1993-01-01

    C Language Integrated Production System (CLIPS), a NASA-developed expert systems program, is used by American Airlines for three purposes: as a rapid prototyping tool; to develop production prototypes; and to develop production application. An example of the latter is CLIPS' use in "Hub S1AAshing," a knowledge based system that recommends contingency plans when severe schedule reductions must be made. Hub S1AAshing has replaced a manual, labor intensive process. It saves time and allows Operations Control Coordinators to handle more difficult situations. Because the system assimilates much of the information necessary to facilitate educated decision making, it minimizes negative impact in situations where it is impossible to operate all flights.

  15. Airline alliances, antitrust immunity and market foreclosure

    OpenAIRE

    Bilotkach, Volodymyr; Hüschelrath, Kai

    2010-01-01

    This paper examines the issue of market foreclosure by airline partnerships with antitrust immunity. Overlapping the data on frequency of service and passenger volumes on nonstop routes on the transatlantic airline market with the information on dynamics of airline partnerships, we find evidence consistent with the airlines operating under antitrust immunity refusing to accept connecting passengers from the carriers outside of the partnership at respective hub airports. When an airline partne...

  16. Flight selection at United Airlines

    Science.gov (United States)

    Traub, W.

    1980-01-01

    Airline pilot selection proceedures are discussed including psychogical and personality tests, psychomotor performance requirements, and flight skills evaluation. Necessary attitude and personality traits are described and an outline of computer selection, testing, and training techniques is given.

  17. Evaluation of the US Airline Industry: The Airline Quality Rating 2012

    OpenAIRE

    Bowen, Brent D.; Headley, Dean E.

    2013-01-01

    The Airline Quality Rating (AQR) was developed and first announced in early 1991 as an objective method for assessing airline quality on combined multiple performance criteria. This current report, the Airline Quality Rating 2012, reflects monthly Airline Quality Rating scores for calendar year 2011. AQR scores for 2011 are based on 15 elements in four major areas that focus on airline performance aspects important to air travel consumers. The Airline Quality Rating 2012 is a summary of mo...

  18. International airline groups in Africa.

    OpenAIRE

    Piotr Niewiadomski

    2013-01-01

    Abstract This paper contributes to the international research project ‘Capturing the Gains: Economic and Social Upgrading in Global Production Networks and Trade’. Its main aim is to analyse the operations of international airlines in Africa and assess the influence of the international aviation industry on the development of tourism in selected African states. Simultaneously, through an exploration of the different ways in which international airline groups can foster the development of the ...

  19. United Airlines LOFT training

    Science.gov (United States)

    Cavanagh, D.; Traub, B.

    1981-01-01

    Line oriented training is used in a broader, more generic sense that as a specific program under FAR 12.1409 and AC 120-35. A company policy was adopted more than twenty years ago requiring that all pilot checks and recurrent training be conducted with a full crew occupying the seats they occupy on the line. Permission was obtained to reschedule the hours for recurrent proficiency training to include one and one-half hours of LOFT flight. The number of emergencies and abnormal procedures which could be undertaken were considered and the introduction of an a occasional incapacitation revealed which person is the most difficult to replace on the widebodies. By using the LOFT concept, every training period can be structured like a typical line flight. The use of LOFT in simulator syllabus development and problems that need to be refined are discussed.

  20. Arranging the Seats

    Institute of Scientific and Technical Information of China (English)

    官琪

    2004-01-01

    Fiveyouthsfromdifferentcountriescometoapartyandsitaroundaroundtable.AisaChinesewhoalsospeaksEnglish;BisaFrenchWhohaslearnedJapanese;CcomesfromEnglandbutalsospeaksFrench;DisaJapanesewhoseforeignlanguageisChinese;EisaFrenchwhoalsospeaksSpanish(西班牙语).HowcanyouarrangetheirseatssothattheyCanspeakwiththepersonssittingnexttohim?(Keytobefound.)Arranging the Seats@官琪

  1. Composite shell spacecraft seat

    Science.gov (United States)

    Barackman, Victor J. (Inventor); Pulley, John K. (Inventor); Simon, Xavier D. (Inventor); McKee, Sandra D. (Inventor)

    2008-01-01

    A two-part seat (10) providing full body support that is specific for each crew member (30) on an individual basis. The two-part construction for the seat (10) can accommodate many sizes and shapes for crewmembers (30) because it is reconfigurable and therefore reusable for subsequent flights. The first component of the two-part seat construction is a composite shell (12) that surrounds the crewmember's entire body and is generically fitted to their general size in height and weight. The second component of the two-part seat (10) is a cushion (20) that conforms exactly to the specific crewmember's entire body and gives total body support in more complex environment.

  2. European vs. U.S. Airlines

    DEFF Research Database (Denmark)

    Assaf, A. Georg; Josiassen, Alexander

    2012-01-01

    This study measures and compares the efficiency and productivity of European and U.S. airlines, over the period from 2001 to 2008. We measure efficiency by estimating a Bayesian distance frontier model subject to regularity constraints. Productivity estimates are also derived parametrically, based...... on the constrained model indicate that European airlines have slightly higher efficiency and productivity growth than U.S. airlines. A comparison based on the type of airlines indicates that low-cost airlines are on average more productive and efficient than full-service airlines. The decomposition...

  3. International Airline Hubbing in a Competitive Environment

    OpenAIRE

    Hansen, Mark M.; Kanafani, Adib

    1987-01-01

    Changes in the U.S. domestic airline route system have increased competition between international gateways. To assist in understanding this phenomenon, a system of models that predicts airline passenger flows resulting from different airline gateway hubbing strategies has been developed. The calibrated models predict baseline passenger flows quite accurately. The system was then used to project future traffic at a specific airport under alternative hubbing strategies of an airline. The resul...

  4. 76 FR 63818 - Special Conditions: Boeing Model 767-400ER Series Airplanes; Seats With Inflatable Lapbelts

    Science.gov (United States)

    2011-10-14

    ... occupant and will provide the required head injury protection. 4. It must be shown that the inflatable... Airlines applied for a supplemental type certificate to install inflatable lapbelts for head injury... of inflatable lapbelts for head injury protection on certain seats in Boeing Model 767-400ER...

  5. Celestial Beauty Leads The Hainan Airlines

    Institute of Scientific and Technical Information of China (English)

    2005-01-01

      Based on the corporate culture of"intemally cultivating the spirit with the essence of the traditional Chinese culture,and externally combining the advanced western management and technology",Hainan Airlines Company Limited (hereinafter called HNA) has turned from a new soaring airlines to the fourth biggest airlines in China.……

  6. Celestial Beauty Leads The Hainan Airlines

    Institute of Scientific and Technical Information of China (English)

    2005-01-01

    @@ Based on the corporate culture of"intemally cultivating the spirit with the essence of the traditional Chinese culture,and externally combining the advanced western management and technology",Hainan Airlines Company Limited (hereinafter called HNA) has turned from a new soaring airlines to the fourth biggest airlines in China.

  7. A study of commuter airline economics

    Science.gov (United States)

    Summerfield, J. R.

    1976-01-01

    Variables are defined and cost relationships developed that describe the direct and indirect operating costs of commuter airlines. The study focused on costs for new aircraft and new aircraft technology when applied to the commuter airline industry. With proper judgement and selection of input variables, the operating costs model was shown to be capable of providing economic insight into other commuter airline system evaluations.

  8. United Airlines Named Best Transpacific Airline at OAAG Airline of the Year Awards "Oscars of the Airline Industry" Highlight United's Extensive Service to Asia-Pacific Region"

    Institute of Scientific and Technical Information of China (English)

    2005-01-01

    @@ United Airlines (OTCBB:UALAQ.OB) was named Best Transpacific Airline by the annual OAG Airline of the Year Awards during an awards ceremony in London. OAG is a content management company specializing in travel and transport, which selected winners of the awards based on the votes of a worldwide audience of business travelers.

  9. United Airlines Named Best Transpacific Airline at OAAG Airline of the Year Awards "Oscars of the Airline Industry" Highlight United's Extensive Service to Asia-Pacific Region"

    Institute of Scientific and Technical Information of China (English)

    2005-01-01

      United Airlines (OTCBB:UALAQ.OB) was named Best Transpacific Airline by the annual OAG Airline of the Year Awards during an awards ceremony in London. OAG is a content management company specializing in travel and transport, which selected winners of the awards based on the votes of a worldwide audience of business travelers.……

  10. Southwest Airlines: lessons in loyalty.

    Science.gov (United States)

    D'Aurizio, Patricia

    2008-01-01

    Southwest Airlines continues to garner accolades in the areas of customer service, workforce management, and profitability. Since both the health care and airlines industries deal with a service rather than a product, the customer experience depends on the people who deliver that experience. Employees' commitment or "loyalty" to their customers, their employer, and their work translates into millions of dollars of revenue. What employee wants to work for "the worst employer in town?" Nine loyalty lessons from Southwest can be carried over to the health care setting for the benefit of employees and patients. PMID:19330974

  11. Car Seat Safety.

    Science.gov (United States)

    Preston, J. A.

    1991-01-01

    This article provides information and a product listing concerning the special automobile seating needs of children with disabilities. The products listed meet the needs of children who weigh less than 20 pounds, must be transported lying down, need help with trunk control and/or head control, wear hip spica casts, are ventilator-dependent, and…

  12. Residence Hall Seating That Works.

    Science.gov (United States)

    Wiens, Janet

    2003-01-01

    Describes the seating chosen for residence halls at the Massachusetts Institute of Technology and the University of New England. The seating required depends on ergonomics, aesthetics, durability, cost, and code requirements. In addition, residence halls must have a range of seating types to accommodate various uses. (SLD)

  13. Strategic analysis of Czech Airlines

    OpenAIRE

    Moiseeva, Polina

    2016-01-01

    The thesis called Strategic Analysis of Czech Airlines which completely analyses current situation within the company. It presents theoretical base for such an analysis and subsequently offers situational analysis, which includes the analysis of external environment, internal environment and suggestions for improvement. The thesis includes a complete companys SWOT analysis and offers the applying of Porters five forces framework. The thesis also includes recommendations and suggestions for th...

  14. Seat IBE Concept

    Institute of Scientific and Technical Information of China (English)

    2010-01-01

    大众的SEAT品牌发布了一款具有未来特色的SEAT IBE概念车。这款4座小车采用双门掀背钢炮设计,将使用一台75kW的电动机,最大功率74kW,18kW时的锂离子电池组负贵为它提供电力。

  15. The Changing Low-Cost Airline Model: An Analysis of Spirit Airlines

    OpenAIRE

    Rosenstein, David E

    2013-01-01

    In recent years legacy airlines have struggled, while low-cost carriers have achieved success. The original low-cost operating model, created by Southwest Airlines, has been adapted by airlines worldwide. Previous studies argue that the more a company adheres to the original model, the more successful the airline will be. Little academic study of the current state of the low-cost model exists. The researcher seeks to address this gap through qualitative methods and a case study involving S...

  16. Price Discrimination in the Airline Industry

    OpenAIRE

    Stringer, Elizabeth

    2008-01-01

    In the past 10 to 15 years we have seen the emergence of low cost, "no frills" airlines competing directly with traditional carriers. This increase in competition coupled with the growing use of the internet has significantly increased price transparency within the airline industry. The primary aim of this study is to determine if and how price transparency has altered the way airlines price discriminate. The first part of this paper contains a general review of price discrimination with...

  17. Airline Financial Distress and Customer Satisfaction

    OpenAIRE

    Ribbink, Dina; Hofer, Christian; Dresner, Martin

    2009-01-01

    An investigation is conducted on the effect of financial distress on customer service levels in the U.S. airline industry. Using data from the first quarter of 1998 to the third quarter of 2006, we employ a seemingly unrelated regressions (SUR) model to analyze the impact of financial distress on three measures of customer service. We find that higher financial distress is associated with better on-time performance of airlines and fewer lost bags. The relationship of airline financial distres...

  18. Chinese Airline Official Microblog Influence Analysis

    Directory of Open Access Journals (Sweden)

    Zhang Li

    2015-09-01

    Full Text Available 10 Airlines official micro-blog on the sina microblog platform as sample, airline official microblog influence is analysed. Six indexes, fans number, microblog open time; average daily microblog number, proportion of original microblog, average comment number and reposted number are used to found the principal component analysis model. Three principal components microblog activity, fans initiative and microblog innovation degree, contribute 84% of the total resources. Suggestions to improve airline microblog influence are given based on characteristics of the model.

  19. Location-Price Competition in Airline Networks

    Directory of Open Access Journals (Sweden)

    H. Gao

    2014-01-01

    Full Text Available This paper addresses location-then-price competition in airline market as a two-stage game of n players on the graph. Passenger’s demand distribution is described by multinomial logit model. Equilibrium in price game is computed through best response dynamics. We solve location game using backward induction, knowing that airlines will choose prices from equilibrium for the second-stage game. Some numerical results for airline market under consideration are presented.

  20. Location-Price Competition in Airline Networks

    OpenAIRE

    Gao, H.; J. Hu; Mazalov, V.; Shchiptsova, A.; L. Song; Tokareva, J.

    2014-01-01

    This paper addresses location-then-price competition in airline market as a two-stage game of n players on the graph. Passenger’s demand distribution is described by multinomial logit model. Equilibrium in price game is computed through best response dynamics. We solve location game using backward induction, knowing that airlines will choose prices from equilibrium for the second-stage game. Some numerical results for airline market under consideration are presented.

  1. Multiple Equilibria and Deterrence in Airline Markets

    OpenAIRE

    Ciliberto, Federico; Zhang, Zhou

    2014-01-01

    We use data from the US airline industry to estimate a model of entry deterrence. We model the interaction among airlines as a repeated static game, where we allow for a very general form of heterogeneity. We consider a menu of three alternative games that describe the strategic interaction among airlines: simultaneous and sequential move games, and a sequential move game with deterrence investments. Following Bernheim [1984], deterrence investments include all investment that rai...

  2. United Airlines Voted 'Best North American Airline' for Fifth Consecutive Year

    Institute of Scientific and Technical Information of China (English)

    2005-01-01

    @@ Discerning frequent travelers in Asia have voted United Airlines the" Best North American Airline" for the fifth consecutive year in Business Traveller AsiaPacific's 2005 annual travel awards. Each year, the magazine polls frequent travelers to learn their opinions on airlines and services. Results are verified and compiled by an independent market research company :TNS-Hong Kong.

  3. STUDY REGARDING COMPANIES PERFORMANCE MEASUREMENT THROUGH NON-FINANCIAL INDICATORS – THE CASE OF AIRLINE INDUSTRY

    Directory of Open Access Journals (Sweden)

    Radu-Dan TURCU

    2015-12-01

    Full Text Available The fact that financial information alone is insufficient in assessing a company’s performance is more and more debated. . The present paper aims to analyze the relation between the changes in companies’ market value and selected financial and non-financial indicators for the airline industry. The main aim of this study is to analyze the value relevance of non-financial information in assessing a company’s performance by reference to the airline industry. The results reveal that non-financial indicators “load factor”, “available seat kilometers” and the financial measures “pretax return on assets”,“curent ratio”, ”debt-to-equity ratio” and ”sales growth” are valuable in explaining the stock price evolution.

  4. How have the strategies of Airlines been affected by the 2008 economic recession? A study focusing on British Airways, American Airlines, Southwest Airlines and EasyJet.

    OpenAIRE

    Morley, Christopher M

    2009-01-01

    Abstract This paper looks at both Porters Generic strategies theory and the newer resource based view of strategy and applies these theories to the Airline industry using four focus cases. The companies looked at are British Airways, EasyJet, Southwest Airlines and American Airlines. The study of these cases allows for an overview of the role of strategy in the airline industry and enables a comparison regarding the effects of the current economic recession on the chosen airlines and the m...

  5. Business Travellers Vote DRAGONAIR "Best China Airline"

    Institute of Scientific and Technical Information of China (English)

    2005-01-01

    @@ (BEIJING) Dragonair was announced as winner of the Best China Airline category in the Business Traveller Asia-Pacific 2005 Annual Travel Awards today. The magazine asked subscribers who were frequent travellers to vote for an airline based on 17 criteria,including cabin staff, comfort, route network and scheduling.

  6. Business Travellers Vote DRAGONAIR "Best China Airline"

    Institute of Scientific and Technical Information of China (English)

    2005-01-01

      (BEIJING) Dragonair was announced as winner of the Best China Airline category in the Business Traveller Asia-Pacific 2005 Annual Travel Awards today. The magazine asked subscribers who were frequent travellers to vote for an airline based on 17 criteria,including cabin staff, comfort, route network and scheduling.……

  7. Consumer Marketing and the Airline Industry

    Science.gov (United States)

    Roy, W. R.

    1972-01-01

    The fundamentals of consumer marketing as applied to the airline industry are considered. An attempt is made to boil down the mystique and jargon which frequently surround the subject of marketing. Topics covered include: (1) The marketing concept; (2) consumer expectations from airlines; (3) planning of marketing strategy; and (4) the roles of advertising, sales, and middlemen.

  8. Airline Careers. Aviation Careers Series. Revised.

    Science.gov (United States)

    Zaharevitz, Walter

    This booklet, one in a series on aviation careers, outlines the variety of careers available in airlines. The first part of the booklet provides general information about careers in the airline industry, including salaries, working conditions, job requirements, and projected job opportunities. In the main part of the booklet, the following 22 job…

  9. Tips for Airline Travelers with Sjogren's Syndrome

    Science.gov (United States)

    Tips for Airline Travelers with Sjögren’s Syndrome For more information on Sjogren's syndrome, visit the SSF Web site at www.sjogrens. ... org for more information on Sjögren’s syndrome. New airline rules can have a profound effect on those ...

  10. Airline Disruption Management - Perspectives, Experiences and Outlook

    DEFF Research Database (Denmark)

    Kohl, Niklas; Larsen, Allan; Larsen, Jesper;

    2004-01-01

    Over the past decade, airlines have become more concerned with developing an optimal flight schedule, with very little slack left to accommodate for any form of variation from the optimal solution. During operation the planned schedules often have to be revised due to disruptions caused by for...... disruptions. The purpose of this paper is twofold. In the first part it o ers an introduction to airline disruption management, provides the readers with a description of the planning processes and delivers a detailed overview of the numerous aspects of airline disruption management. In the second part we...... report on experiences from a large research and development project on airline disruption management. Within the project the first prototype of a multiple resource decision support system at the operations control center in a major airline, has been implemented....

  11. The Operational Performance of UK Airlines

    DEFF Research Database (Denmark)

    Assaf, A. Georg; Josiassen, Alexander

    2011-01-01

    Purpose – The purpose of this paper is to measure the efficiency of UK airlines in light of all the recent industry challenges. Design/methodology/approach – The study measured the technical efficiency of airlines through the innovative data envelopment analysis (DEA) bootstrap methodology....... Findings – Results based on a sample of recent input/output data indicated that the efficiency of UK airlines has continuously declined since 2004 to reach a value of 73.39 per cent in 2007. Factors which were found to be significantly and positively related to technical efficiency variations include...... airline size and load factor. The paper also highlights that factors such as increase in oil price and fierce market competition were also potential inefficiency determinants. Practical implications – The findings of this paper provide a fresh link between airline performance and the current industry...

  12. AAP Updates Recommendations on Car Seats

    Science.gov (United States)

    ... Size Email Print Share AAP Updates Recommendations on Car Seats Page Content Article Body Children should ride ... of approved car safety seats. Healthy Children Radio: Car Seat Safety Dennis Durbin, MD, FAAP, lead author ...

  13. The Effects of Applying Revenue Management on Customer Satisfaction in Airline Industry: An Experimental Study in Indonesia

    Directory of Open Access Journals (Sweden)

    Rambat Lupiyoadi

    2013-06-01

    Full Text Available This research mainly discusses about the effects of applying revenue management, specifically in the contexts of inventory control (variation in ticket prices for the same flight and class and denied boarding (permissibility of reservations exceeding carrying capacity as a hedging practice over the possibility of tickets cancellation on the customers’ satisfaction toward airlines in Indonesia. Experimental method was applied on the research, involving students from University of Indonesia asparticipants. The results showed that inventory control policy partly affected customer satisfaction, while the denied boarding policy fully affected their satisfaction. These research findings can contributeto further studies on consumers’ behaviour in dynamic airlines industry, mainly in emerging markets such as Indonesia.Keywords: Airlines, Revenue Management, Customer Satisfaction

  14. Feel Seating System

    Institute of Scientific and Technical Information of China (English)

    2005-01-01

    我们不知道应该用什么样的名词来为Feel Seating System起名,床?沙发?躺椅?……它好像什么都是,却又什么都不是,这个由120只花花绿绿的软织物球所构成的东西,可以由你随心所欲地将它变成各种各样的坐具或卧具,抑或是偶尔当成一床被子或睡袋来使用都没问题。

  15. Seat belts, airbags and child protection devices. [previously: Seat belts and child restraint seats.

    NARCIS (Netherlands)

    2010-01-01

    In the Netherlands, the use of seat belts results in a yearly reduction of hundreds of fatalities. Seat belts reduce the risk of fatal injury by 37 to 48%, depending on the position in the car. At 50%, the effect of child protection devices is even slightly higher. When last measured (in 2010), 97%

  16. Airline Disruption Management - Perspectives, Experiences and Outlook

    DEFF Research Database (Denmark)

    Kohl, Niklas; Larsen, Allan; Larsen, Jesper;

    2007-01-01

    Over the past decade, airlines have become more concerned with developing an optimal flight schedule, with very little slack left to accommodate for any form of variation from the optimal solution. During operation the planned schedules often have to be revised due to disruptions caused by for ex...... part we report on experiences from a large research and development project on airline disruption management. Within the project the first prototype of a multiple resource decision support system at the operations control center in a major airline, has been implemented....

  17. Error Prevention as Developed in Airlines

    International Nuclear Information System (INIS)

    The airline industry is a high-risk endeavor. Tens of thousands of flights depart each day carrying millions of passengers with the potential for catastrophic consequences. To manage and mitigate this risk, airline operators, labor unions, and the Federal Aviation Administration have developed a partnership approach to improving safety. This partnership includes cooperative programs such as the Aviation Safety Action Partnership and the Flight Operational Quality Assurance. It also involves concentrating on the key aspects of aircraft maintenance reliability and employee training. This report discusses recent enhancements within the airline industry in the areas of proactive safety programs and the move toward safety management systems that will drive improvements in the future

  18. Take your seats: Leftward asymmetry in classroom seating choice

    Directory of Open Access Journals (Sweden)

    Victoria Lynn Harms

    2015-08-01

    Full Text Available Despite an overall body symmetry, human behaviour is full of examples of asymmetry, from writing or gesturing to kissing and cradling. Prior research has revealed that theatre patrons show a bias towards sitting on the right side of a movie theatre. Two competing theories have attempted to explain this seating asymmetry: one posits that expectation of processing demand drives the bias; the other posits that basic motor asymmetries drive the bias. To test these theories we assessed the real-world classroom seating choices of university students using photographs. A bias for students to choose seats on the left side of the classroom was observed, in contrast to the right side bias observed in theatre seating studies. These results provide evidence in support of a processing-expectation bias.

  19. Take your seats: leftward asymmetry in classroom seating choice.

    Science.gov (United States)

    Harms, Victoria L; Poon, Lisa J O; Smith, Austen K; Elias, Lorin J

    2015-01-01

    Despite an overall body symmetry, human behavior is full of examples of asymmetry, from writing or gesturing to kissing and cradling. Prior research has revealed that theatre patrons show a bias towards sitting on the right side of a movie theatre. Two competing theories have attempted to explain this seating asymmetry: one posits that expectation of processing demand drives the bias; the other posits that basic motor asymmetries drive the bias. To test these theories we assessed the real-world classroom seating choices of university students using photographs. A bias for students to choose seats on the left side of the classroom was observed, in contrast to the right side bias observed in theatre seating studies. These results provide evidence in support of a processing-expectation bias. PMID:26347639

  20. A mixed method study of airline brand equity

    OpenAIRE

    Nakaprasit, Ayudh

    2012-01-01

    This research investigates airline brand equity in a sequential, mixed method study. The initial, exploratory study undertaken with the focus groups identified relevant issues that influence airline brand equity. The secondary associations of airline brands are often related to the airlines’ country of origin and culture or the intangible cues that are used in airline advertisements. These intangible cues and secondary associations play an important role in triggering airline ...

  1. An empirical analysis of airline business model convergence

    OpenAIRE

    Daft, Jost; Albers, Sascha

    2014-01-01

    Based on a sample of 26 European passenger airlines, this study analyzes the development of airline business models over time. We used various distance measures to calculate concrete differentiation levels among these airlines between 2004 and 2012. The results indicate increasing similarity among these airlines, which lends support to the generally assumed convergence trend. The present paper complements the mostly qualitative and anecdotal literature on convergence in the airline industry, ...

  2. A conceptual framework for measuring airline business model convergence

    OpenAIRE

    Daft, Jost; Albers, Sascha

    2012-01-01

    This paper develops a measurement framework that synthesizes the airline and strategy literature to identify relevant dimensions and elements of airline business models. The applicability of this framework for describing airline strategies and structures and, based on this conceptualization, for assessing the potential convergence of airline business models over time is then illustrated using a small sample of five German passenger airlines. For this sample, the perception of a rapprochement ...

  3. How Airline Markets Work...Or Do They? Regulatory Reform in the Airline Industry

    OpenAIRE

    Severin Borenstein; Rose, Nancy L.

    2007-01-01

    Following a brief review of the U.S. domestic airline industry under regulation (1938-1978), we study the changes that have occurred in pricing, service, and competition in the 28 years since deregulation. We then examine some of the major public policy issues facing the industry: (a) the sustainability of competition and volatility of airline profits, (b) possible market power of dominant airlines, and (c) congestion and investment shortfall in the airport and air traffic infrastructure.

  4. 46 CFR 116.820 - Seating.

    Science.gov (United States)

    2010-10-01

    ... 46 Shipping 4 2010-10-01 2010-10-01 false Seating. 116.820 Section 116.820 Shipping COAST GUARD... § 116.820 Seating. (a) A seat must be provided for each passenger permitted in a space for which the fixed seating criterion in § 115.113(b)(3) of this subchapter has been used to determine the number...

  5. 46 CFR 177.820 - Seating.

    Science.gov (United States)

    2010-10-01

    ... 46 Shipping 7 2010-10-01 2010-10-01 false Seating. 177.820 Section 177.820 Shipping COAST GUARD... ARRANGEMENT Passenger Accommodations § 177.820 Seating. (a) A seat must be provided for each passenger permitted in a space for which the fixed seating criterion in § 176.113(b)(3) of this subchapter has...

  6. Airline Disaster Highlights Need for Ethical Coverage.

    Science.gov (United States)

    Andrews, Kate

    1989-01-01

    Describes a Syracuse University professor/reporter's experiences covering the airline disaster that killed 35 Syracuse students. Discusses the problems of ethically covering a story where a lot of grief is involved. (MS)

  7. Financial Analysis Report: Malaysia Airlines 2007 - 2011

    OpenAIRE

    Gilbert O'Neil Mushure

    2014-01-01

    This work is an analysis of the annual reports of Malaysia Airlines Berhad from 2007 to 2011. Profitability analysis was done on the financial statements of the company from 2007 to 2011. Cash and working capital management analysis were done on the financial statements of 2010 and 2011. It was found that Malaysia Airlines Berhad was constantly suffering from high costs of operations which resulted in consecutive negative gross profit over the years.Net profit remained positive only as a resu...

  8. Airline Applications of Business Intelligence Systems

    OpenAIRE

    Mihai ANDRONIE

    2015-01-01

    Airline industry is characterized by large quantities of complex, unstructured and rapid changing data that can be categorized as big data, requiring specialized analysis tools to explore it with the purpose of obtaining useful knowledge as decision support for companies that need to fundament their activities and improve the processes they are carrying on. In this context, business intelligence tools are valuable instruments that can optimally process airline related data so that the acti...

  9. Combining robustness and recovery for airline schedules

    OpenAIRE

    Eggenberg, Niklaus

    2009-01-01

    In this thesis, we address different aspects of the airline scheduling problem. The main difficulty in this field lies in the combinatorial complexity of the problems. Furthermore, as airline schedules are often faced with perturbations called disruptions (bad weather conditions, technical failures, congestion, crew illness…), planning for better performance under uncertainty is an additional dimension to the complexity of the problem. Our main focus is to develop better schedules that are le...

  10. UNDERSTANDING CUSTOMERS' EVALUATIONS THROUGH MINING AIRLINE REVIEWS

    OpenAIRE

    Ibrahim Yakut; Tugba Turkoglu; Fikriye Yakut

    2015-01-01

    Data mining can be evaluated as a strategic tool to determine the customer profiles in order to learn customer expectations and requirements. Airline customers have different characteristics and if passenger reviews about their trip experiences are correctly analyzed, companies can increase customer satisfaction by improving provided services. In this study, we investigate customer review data for in-flight services of airline companies and draw customer models with respect to suc...

  11. Price Discrimination through Refund Contracts in Airlines

    OpenAIRE

    Escobari, Diego; Jindapon, Paan

    2014-01-01

    This paper shows how an airline monopoly uses refundable and non-refundable tickets to screen consumers who are uncertain about their travel. Our theoretical model predicts that the difference between these two fares diminishes as individual demand uncertainty is resolved. Using an original data set from U.S. airline markets, we find strong evidence supporting our model. Price discrimination opportunities through refund contracts decline as the departure date nears and individuals learn about...

  12. Airport privatization competition including domestic airline networks

    OpenAIRE

    Akio Kawasaki

    2013-01-01

    This paper addresses the problem of hub airport privatization, similar to the studies by Matsumura and Matsushima (2012) and Mantin (2012). However, differentiating from their papers, this paper introduces a domestic airline network. That is, each country has one major hub airport and some local airports. The main result obtained in this paper is as follows. When at least one country has a small domestic airline network, the same result as that by Matsumura and Matsushima (2012) and Mantin (2...

  13. United Airlines Makes Gonnections Easier for Passengers

    Institute of Scientific and Technical Information of China (English)

    2006-01-01

    @@ United is the only U.S. Carrier connecting Pearl River Delta Region to offer customers SkyPier ferry service and pier-side check-in. United Airlines is the first U.S. Airline to offer customers convenient travel between the Pearl River Delta cities and Hong Kong International Airport using the SkyPier ferry service and pier-side check-in, beginning today.

  14. Simulating airline operational responses to environmental constraints

    OpenAIRE

    Evans, Antony

    2010-01-01

    This dissertation describes a model that predicts airline flight network, frequency and fleet changes in response to policy measures that aim to reduce the environmental impact of aviation. Such airline operational responses to policy measures are not considered by existing integrated aviation-environment modelling tools. By not modelling these effects the capability of the air transport system to adjust under changing conditions is neglected, resulting in the forecasting of potentially misle...

  15. Seat Design for Crash Worthiness

    Science.gov (United States)

    Pinkel, I Irving; Rosenberg, Edmund G

    1957-01-01

    A study of many crash deceleration records suggested a simplified model of a crash deceleration pulse, which incorporates the essential properties of the pulse. The model pulse is considered to be composed of a base pulse on which are superimposed one or more secondary pulses of shorter duration. The results of a mathematical analysis of the seat-passenger deceleration in response to the airplane deceleration pulse are provided. On the basis of this information, presented as working charts, the maximum deceleration loads experienced by the seat and passenger in response to the airplane deceleration pulse can be computed. This maximum seat-passenger deceleration is found to depend on the natural frequency of the seat containing the passenger, considered as a mass-spring system. A method is presented that shows how to arrive at a combination of seat strength, natural frequency, and ability to absorb energy in deformation beyond the elastic limit that will allow the seat to serve without failure during an airplane deceleration pulse taken as the design requirement.

  16. Scandinavian Airlines Becomes the World's First Airline to Have All Intercontinental Flights Equipped with Wireless Internet

    Institute of Scientific and Technical Information of China (English)

    2005-01-01

    @@ In March this year, Scandinavian Airlines became the world's first airline to provide wireless broadband Internet on all intercontinental flights. This means that passengers can surf the web, send and receive emails, chat online, use Intemet telephone services and log on to their company's virtual private network while flying 12,000 meters above the earth.

  17. Scandinavian Airlines Becomes the World's First Airline to Have All Intercontinental Flights Equipped with Wireless Internet

    Institute of Scientific and Technical Information of China (English)

    2005-01-01

      In March this year, Scandinavian Airlines became the world's first airline to provide wireless broadband Internet on all intercontinental flights. This means that passengers can surf the web, send and receive emails, chat online, use Intemet telephone services and log on to their company's virtual private network while flying 12,000 meters above the earth.……

  18. Aviation Accidents: CRM to Maintaining the Share of Airlines. Case Study on Accidents Airlines in China

    Science.gov (United States)

    Alnuaimi, Qussay A. B.

    2015-01-01

    We present Aviation Cost Risk management (CRM) methodology designed for Airlines Company, who needs to run projects beyond their normal. These airlines are critical to the survival of these organizations, such as the development and performance. The Aviation crisis can have considerable impact upon the value of the firm. Risk managers must focus…

  19. Airline Applications of Business Intelligence Systems

    Directory of Open Access Journals (Sweden)

    Mihai ANDRONIE

    2015-09-01

    Full Text Available Airline industry is characterized by large quantities of complex, unstructured and rapid changing data that can be categorized as big data, requiring specialized analysis tools to explore it with the purpose of obtaining useful knowledge as decision support for companies that need to fundament their activities and improve the processes they are carrying on. In this context, business intelligence tools are valuable instruments that can optimally process airline related data so that the activities that are conducted can be optimized to maximize profits, while meeting customer requirements. An airline company that has access to large volumes of data (stored into conventional or big data repositories has two options to extract useful decision support information: processing data by using general-purpose business intelligence systems or processing data by using industry specific business intelligence systems. Each of these two options has both advantages and disadvantages for the airline companies that intend to use them. The present paper presents a comparative study of a number of general-purpose and airline industry specific business intelligence systems, together with their main advantages and disadvantages.

  20. Service Quality in the U.S. Airline Industry: Variations in Performance Within Airlines and Between Airlines and the Industry

    Science.gov (United States)

    Rhoades, Dawna L.; Waguespack, Blaise, Jr.

    2000-01-01

    This study examined the service quality of 25 U.S. airlines (1987-1996) using data from the Department of Transportation's Air Travel Consumer Report. After a total quality and total complaint rate was calculated for these airlines, a 95 percent confidence interval was placed around the yearly and company means calculated to examine those cases that were significantly different from the mean. Results indicate that while the major carriers are converging toward a higher level of quality, there continues to be significant yearly variation. The service quality of regional carriers was much lower than major carriers and showed much greater variation.

  1. Singapore Airlines and South African Airways Sign Codeshare Agreement

    Institute of Scientific and Technical Information of China (English)

    2006-01-01

    @@ From 15 September 2006, Singapore Airlines' customers will be able to travel to more destinations in South Africa thanks to a new codeshare agreement signed by Singapore Airlines and South African Airways (SAA).

  2. Continental Airlines Receives J.D. Power and Associates Award

    Institute of Scientific and Technical Information of China (English)

    2006-01-01

    @@ On June 29, 2006, Continental Airlines (NYSE: CAL) was ranked the highest in Customer Satisfaction Among Traditional Network Carriers in North America in the J.D.Power and Associates 2006 Airline Satisfaction Index StudySM.

  3. Planning and Scheduling of Airline Operations

    Directory of Open Access Journals (Sweden)

    İlkay ORHAN

    2010-02-01

    Full Text Available The Turkish Civil Aviation sector has grown at a rate of 53 % between the years 2002-2008 owing to countrywide economical developments and some removed restrictions in the aviation field. Successful international companies in the sector use advanced computer-supported solution methods for their planning and scheduling problems. These methods have been providing significant competitive advantages to those companies. There are four major scheduling and planning problems in the airline sector: flight scheduling, aircraft scheduling, crew scheduling and disruptions management. These aforementioned scheduling and planning problems faced by all airline companies in the airline sector were examined in detail. Studies reveal that companies using the advanced methods might gain significant cost reductions. However, even then, the time required for solving large scale problems may not satisfy the decision quality desired by decision makers. In such cases, using modern decision methods integrated with advanced technologies offer companies an opportunity for significant cost-advantages.

  4. Revenue-sharing mechanisms in airline alliance revenue management problems

    OpenAIRE

    Alahuhta, Jari

    2015-01-01

    The research in revenue management in airline industry is usually limited to problems that only involve a single airline. Due to the emergence and growth of airline alliances, it is becoming increasingly important to understand revenue management in alliance contexts. In this thesis, I discuss different revenue-sharing models in airline alliances and analyze and compare these models both theoretically and through numerical simulations. I also describe how economics commonly approaches this ty...

  5. Medical emergencies on board commercial airlines: is documentation as expected?

    OpenAIRE

    Sand, Michael; Morrosch, Stephan; Sand, Daniel; Altmeyer, Peter; Bechara, Falk G

    2012-01-01

    Introduction The purpose of this study was to perform a descriptive, content-based analysis on the different forms of documentation for in-flight medical emergencies that are currently provided in the emergency medical kits on board commercial airlines. Methods Passenger airlines in the World Airline Directory were contacted between March and May 2011. For each participating airline, sample in-flight medical emergency documentation forms were obtained. All items in the sample documentation fo...

  6. Oil, Oil Volatility and Airline Stocks: A Global Analysis

    OpenAIRE

    Nandha, Mohan; Brooks, Robert; Robert FAFF

    2013-01-01

    By selecting a globally representative dataset of airline indices, this study demonstrates that oil price or oil price regimes (delineated by the first gulf war and the 9/11 terror attacks) alone do not have any significant implications for airline stock prices. Overall, these findings are contrary to the general perception that higher oil prices or oil volatility are bad news for the airlines industry. Perhaps airlines are in a better position to estimate their oil risk and take hedging posi...

  7. The Future of Airline Distribution: transparency of online shopping experience.

    OpenAIRE

    Nguyen, Nam

    2015-01-01

    Price-aware generation Y customers and low-cost airlines have prompted legacy carriers to unbundle their products and adopt merchandising. At the same time, low-cost airlines have entered meta-search engines, Global Distribution Systems, and started cooperating with travel agencies to attract business travelers. Additionally, airline industry in general has been changing its focus from being product-oriented towards being customer-oriented. Such trends put forward airline merchandising as a ...

  8. The Design of a Large Scale Airline Network

    OpenAIRE

    Carmona Benitez, R.B.

    2012-01-01

    Airlines invest a lot of money before opening new pax transportation services, for this reason, airlines have to analyze if their profits will overcome the amount of money they have to invest to open new services. The design and analysis of the feasibility of airlines networks can be done by using the models developed in this thesis. It is possible to identify routes that are opportunities to open services, based on airline operating costs, passenger demand, aircraft and airport capacities an...

  9. The Future of Regulation in the Airline Industry

    Science.gov (United States)

    Cherington, P. W.; Hill, J. J.

    1972-01-01

    The Federal regulation of airlines is analyzed to predict the amount of regulation to be expected in the future. It is stated that the regulatory powers will increase because of the advantages that such regulation provides to the airlines. Six propositions are submitted as guidelines for future airlines regulation. The loss of revenue experienced by the airlines is examined and methods for improving the economic situation are defined.

  10. Fear of Flying? Economic Analysis of Airline Safety

    OpenAIRE

    Rose, Nancy L.

    1991-01-01

    The safety of the commercial airline industry has attracted considerable attention in the wake of airline deregulation, amid growing concerns that the historical superiority of U.S. jet carriers' safety records may have been linked to economic regulation of the industry by the Civil Aeronautics Board. These worries have energized economic research on a broad range of questions relating to airline safety. I describe our progress in answering four questions: First, has airline safety declined s...

  11. Literature review of the passenger airline business models: Full service carrier, low-cost carrier and charter airlines

    NARCIS (Netherlands)

    Carmona Benitez, R.B.; Lodewijks, G.

    2008-01-01

    The deregulation and liberalization of the air transportation industry have developed three main passenger business models: full service carriers, low-cost carriers, and charter airlines. Deregulation removed regulated fares and routes increasing competition and yields. Airlines business models main

  12. The Design of a Large Scale Airline Network

    NARCIS (Netherlands)

    Carmona Benitez, R.B.

    2012-01-01

    Airlines invest a lot of money before opening new pax transportation services, for this reason, airlines have to analyze if their profits will overcome the amount of money they have to invest to open new services. The design and analysis of the feasibility of airlines networks can be done by using

  13. Solving the Airline Crew Pairing Problem using Subsequence Generation

    DEFF Research Database (Denmark)

    Rasmussen, Matias Sevel; Ryan, David; Lusby, Richard Martin; Larsen, Jesper

    Good and fast solutions to the airline crew pairing problem are highly interesting for the airline industry, as crew costs are the biggest expenditure after fuel for an airline. The crew pairing problem is typically modelled as a set partitioning problem and solved by column generation. However...

  14. Subsequence Generation for the Airline Crew Pairing Problem

    DEFF Research Database (Denmark)

    Rasmussen, Matias Sevel; Lusby, Richard Martin; Ryan, David; Larsen, Jesper

    Good and fast solutions to the airline crew pairing problem are highly interesting for the airline industry, as crew costs are the biggest expenditure after fuel for an airline. The crew pairing problem is typically modelled as a set partitioning problem and solved by column generation. However...

  15. The Statement Airline Service Quality Development

    Institute of Scientific and Technical Information of China (English)

    周威

    2014-01-01

    As the recent emergence of the Low Cost Carriers (LLCs) in Air-line industry, service differentiation and customer satisfaction takes critical role in order to sharpen competitive edges to both Full Service Carriers (FSCs) and LLCs. The current research aims to explore the nature of service quality in airline and its relationship to customer satisfaction. Air service quality dimensions using factor analysis are classified as Ticketing and Boarding Processes, Customer Encounter Services, and Tangibles. Further, the regression analysis reveals the strength of relationships between each of service quality dimensions and customer satisfaction scales that the Ticketing and Boarding Process dimension has the strongest co-relations with customer satisfaction scales.

  16. Guidelines for Change Management for Airline X

    OpenAIRE

    Peltoniemi, Emma

    2015-01-01

    Organizational change is a vital part of the airline industry. Leading change is considered one of the most important parts of success. This thesis project focuses on creating instructions for Airline X in the development of their change processes. This project started from the researcher’s own idea. It was presented to the commissioning company who found it useful and approved the topic. The goal of this project was to create a useful tool for the organization that they are able to utili...

  17. The future of airline business models:

    OpenAIRE

    Marques, Rui

    2015-01-01

    This research is titled “The Future of Airline Business Models: Which Will Win?” and it is part of the requirements for the award of a Masters in Management from NOVA BSE and another from Luiss Guido Carlo University. The purpose is to elaborate a complete market analysis of the European Air Transportation Industry in order to predict which Airlines, strategies and business models may be successful in the next years. First, an extensive literature review of the business model concept has been...

  18. 75 FR 58340 - Airworthiness Directives; Koito Industries, Ltd., Seats and Seating Systems Approved Under...

    Science.gov (United States)

    2010-09-24

    ... rule'' under the DOT Regulatory Policies and Procedures (44 FR 11034, February 26, 1979), and 3. Will..., Ltd., Seats and Seating Systems Approved Under Technical Standard Order (TSO) TSO-C39b, TSO-C39c, or..., Ltd., seats and seating systems approved under TSO-C39b, TSO-C39c, or TSO-C127a. This proposed...

  19. 14 CFR 135.129 - Exit seating.

    Science.gov (United States)

    2010-01-01

    ... 14 Aeronautics and Space 3 2010-01-01 2010-01-01 false Exit seating. 135.129 Section 135.129....129 Exit seating. (a)(1) Applicability. This section applies to all certificate holders operating... certificate holder shall make the passenger exit seating determinations required by this paragraph in a...

  20. 14 CFR 121.585 - Exit seating.

    Science.gov (United States)

    2010-01-01

    ... 14 Aeronautics and Space 3 2010-01-01 2010-01-01 false Exit seating. 121.585 Section 121.585..., FLAG, AND SUPPLEMENTAL OPERATIONS Flight Operations § 121.585 Exit seating. (a)(1) Each certificate... passenger exit seating determinations required by this paragraph in a non-discriminatory manner...

  1. NASA Standards Inform Comfortable Car Seats

    Science.gov (United States)

    2014-01-01

    NASA developed standards, which included the neutral body posture (NBP), to specify ways to design flight systems that support human health and safety. Nissan Motor Company, with US offices in Franklin, Tennessee, turned to NASA's NBP research for the development of a new driver's seat. The 2013 Altima now features the new seat, and the company plans to incorporate the seats in upcoming vehicles.

  2. French experience in seat belt use.

    NARCIS (Netherlands)

    Lassarre, S. & Page, Y.

    1992-01-01

    This paper concerns the French experience in seat belt use. As well as the seat belt regulations, the strategies employed to reinforce the wearing of seat belts by using information and encouragement campaigns and checks by the police and gendarmerie are described here along with their timetables an

  3. 49 CFR 571.207 - Standard No. 207; Seating systems.

    Science.gov (United States)

    2010-10-01

    ... 49 Transportation 6 2010-10-01 2010-10-01 false Standard No. 207; Seating systems. 571.207 Section... Motor Vehicle Safety Standards § 571.207 Standard No. 207; Seating systems. S1. Purpose and scope. This.... Definitions. Occupant seat means a seat that provides at least one designated seating position. Seat...

  4. Cooperative Game Study of Airlines Based on Flight Frequency Optimization

    Directory of Open Access Journals (Sweden)

    Wanming Liu

    2014-01-01

    Full Text Available By applying the game theory, the relationship between airline ticket price and optimal flight frequency is analyzed. The paper establishes the payoff matrix of the flight frequency in noncooperation scenario and flight frequency optimization model in cooperation scenario. The airline alliance profit distribution is converted into profit distribution game based on the cooperation game theory. The profit distribution game is proved to be convex, and there exists an optimal distribution strategy. The results show that joining the airline alliance can increase airline whole profit, the change of negotiated prices and cost is beneficial to profit distribution of large airlines, and the distribution result is in accordance with aviation development.

  5. Interfaces Visualize Data for Airline Safety, Efficiency

    Science.gov (United States)

    2014-01-01

    As the A-Train Constellation orbits Earth to gather data, NASA scientists and partners visualize, analyze, and communicate the information. To this end, Langley Research Center awarded SBIR funding to Fairfax, Virginia-based WxAnalyst Ltd. to refine the company's existing user interface for Google Earth to visualize data. Hawaiian Airlines is now using the technology to help manage its flights.

  6. Airline Revenue Management with Shifting Capacity

    NARCIS (Netherlands)

    K. Pak; R. Dekker (Rommert); G.A.P. Kindervater (Gerard)

    2003-01-01

    textabstractAirline revenue management is the practice of controlling the booking requests such that the planes are filled with the most profitable passengers. In revenue management the capacities of the business and economy class sections of the plane are traditionally considered to be fixed and di

  7. 75 FR 32318 - Enhancing Airline Passenger Protections

    Science.gov (United States)

    2010-06-08

    ...) in a pilot project, Regulation Room, to discover the best ways of using Web 2.0 and social networking... conclusions on the most effective use of social networking technologies in this area. DOT and the Obama... through social networking mediums such as Facebook or Twitter. Do airlines currently communicate...

  8. 75 FR 36300 - Enhancing Airline Passenger Protections

    Science.gov (United States)

    2010-06-25

    ... Airline Passenger Protections (75 FR 32318), which, among other things, solicits comment, without... April 11, 2000 (65 FR 19477-78), or you may visit http://DocketsInfo.dot.gov . Docket: For access to the... the current practice of not prescribing carrier practices concerning the serving of peanuts. (75...

  9. Singapore Airlines A380 Takes Flight

    Institute of Scientific and Technical Information of China (English)

    2006-01-01

    @@ The first A380 aircraft that will be delivered to launch customer Singapore Airlines embarked on its maiden test flight on May 7, 2006. This aircraft will be the world's first A380 to enter commercial service at the end of the year.

  10. Austrian Airlines:Safety is our Business!

    Institute of Scientific and Technical Information of China (English)

    Guo Yan

    2006-01-01

    @@ Mighty Capacity Managed "Although Austrian Airlines is a middle-sized company, it has a mighty capacity of over 10 million customers every year. Because it has an extensive European service network." G(o)tz stressed to China's Foreign Trade.

  11. Objectives of the Airline Firm: Theory

    Science.gov (United States)

    Kneafsey, J. T.

    1972-01-01

    Theoretical models are formulated for airline firm operations that revolve around alternative formulations of managerial goals which these firms are persuing in practice. Consideration is given to the different objective functions which the companies are following in lieu of profit maximization.

  12. The Effects of Applying Revenue Management on Customer Satisfaction in Airline Industry: An Experimental Study in Indonesia

    OpenAIRE

    Rambat Lupiyoadi; Bramana Putra

    2013-01-01

    This research mainly discusses about the effects of applying revenue management, specifically in the contexts of inventory control (variation in ticket prices for the same flight and class) and denied boarding (permissibility of reservations exceeding carrying capacity as a hedging practice over the possibility of tickets cancellation) on the customers’ satisfaction toward airlines in Indonesia. Experimental method was applied on the research, involving students from University of Indonesia a...

  13. A Correlational Study of How Airline Customer Service and Consumer Perception of Airline Customer Service Affect the Air Rage Phenomenon

    Science.gov (United States)

    Hunter, Joyce A.

    2007-01-01

    Between 1995 and 2000, customer service declined throughout the airline industry, as reported in February 2001 by the U.S. Department of Transportation (2001). One of the biggest problems today within the airline industry is the constant complaining from customers regarding the deterioraton of service (McCollough, Berry, & Yadav, 2000). Since 1995, unfortunately no airline has been immune from service deterioration, as reported by the Airline Quality Rating, an annual report by two airline industry experts who analyzed Department of Transportation statistics (Harrison & Kleinsasser, 1999). The airline' refusal to recognize the issue of customer service has perpetuated an environment that has become dangerous and detrimental to the traveling public as well as to airline employees, which in turn has fueled a new phenomenon, now referred to as "air rage".

  14. Airline experience with reliability-centered maintenance

    International Nuclear Information System (INIS)

    Reliability-Centered Maintenance is a process for developing preventive maintenance programs. Its concepts evolved from the post WWII experience of the airline community. Its genesis was in a paper by F. Stanley Nowlan and Thomas D. Matteson of United Airlines for the American Institute of Aeronautics and Astronautics in 1967. Its first application was to the Boeing 747. It has subsequently been adopted by the FAA and the Department of Defense and applied to many new transport and military aircraft. Its objective is applicable and effective preventive maintenance and it has proven to be a highly effective replacement for the prior intuitive processes for selective preventive maintenance tasks. It focuses on system functions, functional failures, then dominant failure modes and effects. It then uses a decision tree to classify failure criticality and identify applicable and effective tasks. The result is a program focused on maintaining inherent safety and reliability at minimum cost. (orig.)

  15. Network Topology of the Austrian Airline Flights

    CERN Document Server

    Han, D D; Qian, J H

    2007-01-01

    We analyze the directed, weighted and evolutionary Austrian airline flight network. It is shown that such a specific airline flight network displays features of small-world networks, namely large clustering coefficient and small average shortest-path length. We study the detailed flight information both in a week and on a whole. In both cases, the degree distributions reveal power law with exponent value of 2 $\\sim$ 3 for the small degree branch and a flat tail for the large degree branch. Similarly, the flight weight distributions have power-law for the small weight branch. The degree-degree correlation analysis shows the network has disassortative behavior, i.e. the large airports are likely to link to smaller airports.

  16. Economic and Environmental Effects of Airline Deregulation

    OpenAIRE

    Schipper, Youdi; Rietveld, Piet

    1997-01-01

    This paper deals with the issue of regulatory reform in the airline industry, in connection with environmental externalities. Deregulation has led to shorter routes, higher frequencies, probably larger aircraft sizes and more intense peak traffic at airports. In addition, deregulation has led to lower average real fares, although various barriers to entry still allow carriers to keep prices above competitive levels. Environmental effects have thus far not received much attention in the discus...

  17. FACTORS EFFECTING CONSUMER PREFERENCES IN AIRLINE INDUSTRY

    OpenAIRE

    Yasir Ali Soomro; Irfan Hameed; Rehan Shakoor; Sana Abbas Kaimkhani

    2012-01-01

    This research paper investigates different factors that affect Consumer Preference in Airline Industry. Nine Factors were considered for the research. Overall Consumer Satisfaction was dependent variable and rest nine was independent variables. Multiple Regression tool was selected for analysis of the data. Questionnaire was developed to collect data having Likert Scale. The findings of this study are based on the analysis of a sample of 100 respondents. The dimensionality of overall customer...

  18. Customer Complaint Behaviors in Turkish Airline Industry

    OpenAIRE

    Güreş, Nuriye; Arslan, Seda; BAKAR, Zeynep KOCAGÖZ

    2013-01-01

    Of late years in Turkey, the number of passengers who prefers air transportation has been increasing expeditiously. In that case, understanding the wants, satisfaction levels and complaining behaviors of passengers has been obligatory for airline companies. Therefore in this study, Turkish passengers’ complaining behaviors and Turkish-oriented airlines’ service recovery efforts toward those complaints have been searched. The study results indicated that most of the passengers have experienced...

  19. Planning and Scheduling of Airline Operations

    OpenAIRE

    İlkay ORHAN; Muzaffer KAPANOĞLU; T. Hikmet KARAKOÇ

    2010-01-01

    The Turkish Civil Aviation sector has grown at a rate of 53 % between the years 2002-2008 owing to countrywide economical developments and some removed restrictions in the aviation field. Successful international companies in the sector use advanced computer-supported solution methods for their planning and scheduling problems. These methods have been providing significant competitive advantages to those companies. There are four major scheduling and planning problems in the airline sector: f...

  20. Robust scheduling and disruption recovery for airlines

    OpenAIRE

    Eggenberg, Niklaus; Salani, Matteo

    2009-01-01

    Airline planning include complex and structured operations that must be planned in advance in order to exploit the available resources, provide a reliable and competitive service and forecast system's performances. Decisions regarding operations are based on data which is frequently due to uncertainty. Moreover, unpredicted events may disrupt the current schedule and force managers to take reactive decisions to recover to an operational state. On the other hand, proactive decisions, i.e. deci...

  1. 75 FR 30775 - Availability of Seats for the Monitor National Marine Sanctuary Advisory Council

    Science.gov (United States)

    2010-06-02

    ... for the following vacant seats: Heritage Tourism seat, Citizen-at-Large seat, Recreational Diving seat...-Large, Conservation, Economic Development, Education, Heritage Tourism, Maritime Archaeological...

  2. UNDERSTANDING CUSTOMERS' EVALUATIONS THROUGH MINING AIRLINE REVIEWS

    Directory of Open Access Journals (Sweden)

    Ibrahim Yakut

    2015-11-01

    Full Text Available Data mining can be evaluated as a strategic tool to determine the customer profiles in order to learn customer expectations and requirements. Airline customers have different characteristics and if passenger reviews about their trip experiences are correctly analyzed, companies can increase customer satisfaction by improving provided services. In this study, we investigate customer review data for in-flight services of airline companies and draw customer models with respect to such data. In this sense, we apply two approaches as feature-based and clustering-based modelling. In feature-based modelling, customers are grouped into categories based on features such as cabin flown types, experienced airline companies. In clustering-based modelling, customers are first clustered via k-means clustering and then modeled. We apply multivariate regression analysis to model customer groups in both cases. During this, we try to understand how customers evaluate the given services and what dominant characteristics of in-flight services can be from the customer viewpoint.

  3. 基于非齐次旅客到达选择的舱位控制比较研究%Comparative Analysis on Inventory Control Based on Non-homogeneous Passengers Arrival and Selection

    Institute of Scientific and Technical Information of China (English)

    樊玮; 刘向荣

    2013-01-01

    Inventory control is the core objective of airline revenue management,but traditional seat inventory control method does not consider the behavior of passengers' choice,which leads to the high-priced travelers buying the lower-price seats,which is not conductive to the application of multi-class fares. So from the perspective of the choice for passengers,study the multi-level inventory allocation. The method chooses the discrete choice model to build the dynamic seat inventory control algorithm based on non-homogeneous passen-gers arrival. And this method will compare with the traditional expectations of marginal revenue algorithm by using simulation. The exper-iments demonstrate that this algorithm considering the passengers’ choice is more potential to apply to the revenue management.%  舱位控制是航空公司实施收益管理的核心目标,由于传统的舱位控制方法并不考虑旅客的选择行为,易于导致高价旅客购买低价舱位,对于多等级票价方面的应用存在缺陷。于是,该文从旅客选择的角度,以研究多等级舱位分配问题为目的。通过对旅客效用和偏好的分析,采用离散选择模型作为建模方法,构建了基于非齐次旅客到达选择的动态舱位控制算法,并采用仿真实验与传统的期望边际收益算法进行比较。实验结果表明,考虑旅客选择行为的算法更具潜在增加航空公司收益的应用价值。

  4. Development of a safe car seat

    OpenAIRE

    Malnarič, Vili; Zupanc, Mirko; Drenovec, Mitja

    2015-01-01

    Here we present a list and order of actions to be taken for the successful development and industrialization of a safe car seat. During the seat's development, its safety role in the car has to be considered. With respect to this, the procedures defining the safety characteristics of the products have to be taken into account. The development stages for a safe car seat are merged within three phases, as follows: the preparation of the starting pointsfor the development of a safe car seat, the...

  5. Conical Seat Shut-Off Valve

    Science.gov (United States)

    Farner, Bruce

    2013-01-01

    A moveable valve for controlling flow of a pressurized working fluid was designed. This valve consists of a hollow, moveable floating piston pressed against a stationary solid seat, and can use the working fluid to seal the valve. This open/closed, novel valve is able to use metal-to-metal seats, without requiring seat sliding action; therefore there are no associated damaging effects. During use, existing standard high-pressure ball valve seats tend to become damaged during rotation of the ball. Additionally, forces acting on the ball and stem create large amounts of friction. The combination of these effects can lead to system failure. In an attempt to reduce damaging effects and seat failures, soft seats in the ball valve have been eliminated; however, the sliding action of the ball across the highly loaded seat still tends to scratch the seat, causing failure. Also, in order to operate, ball valves require the use of large actuators. Positioning the metal-to-metal seats requires more loading, which tends to increase the size of the required actuator, and can also lead to other failures in other areas such as the stem and bearing mechanisms, thus increasing cost and maintenance. This novel non-sliding seat surface valve allows metal-to-metal seats without the damaging effects that can lead to failure, and enables large seating forces without damaging the valve. Additionally, this valve design, even when used with large, high-pressure applications, does not require large conventional valve actuators and the valve stem itself is eliminated. Actuation is achieved with the use of a small, simple solenoid valve. This design also eliminates the need for many seals used with existing ball valve and globe valve designs, which commonly cause failure, too. This, coupled with the elimination of the valve stem and conventional valve actuator, improves valve reliability and seat life. Other mechanical liftoff seats have been designed; however, they have only resulted in

  6. Parameters affecting seat belt use in Greece.

    Science.gov (United States)

    Yannis, G; Laiou, A; Vardaki, S; Papadimitriou, E; Dragomanovits, A; Kanellaidis, G

    2011-09-01

    The objective of this research is the exploration of seat belt use in Greece and particularly the identification of the parameters affecting seat belt use in Greece. A national field survey was conducted for the analytical recording of seat belt use. A binary logistic regression model was developed, and the impact of each parameter on seat belt use in Greece was quantified. Parameters included in the model concern characteristics of car occupants (gender, age and position in the car), the type of the car and the type of the road network. The data collection revealed that in Greece, the non-use of seat belt on the urban road network was higher than on the national and rural road network and young and older men use seat belts the least. The developed model showed that travelling on a national road is negative for not wearing the seat belt. Finally, the variable with the highest impact on not wearing a seat belt is being a passenger on the back seats. PMID:21452095

  7. Crashworthy Seats Would Afford Superior Protection

    Science.gov (United States)

    Gohmert, Dustin

    2009-01-01

    Seats to prevent or limit crash injuries to astronauts aboard the crew vehicle of the Orion spacecraft are undergoing development. The design of these seats incorporates and goes beyond crash-protection concepts embodied in prior spacecraft and racing-car seats to afford superior protection against impacts. Although the seats are designed to support astronauts in a recumbent, quasi-fetal posture that would likely not be suitable for non-spacecraft applications, parts of the design could be adapted to military and some civilian aircraft seats and to racing car seats to increase levels of protection. The main problem in designing any crashworthy seat is to provide full support of the occupant against anticipated crash and emergency-landing loads so as to safely limit motion, along any axis, of any part of the occupant s body relative to (1) any other part of the occupant s body, (2) the spacecraft or other vehicle, and (3) the seat itself. In the original Orion spacecraft application and in other applications that could easily be envisioned, the problem is complicated by severe limits on space available for the seat, a requirement to enable rapid egress by the occupant after a crash, and a requirement to provide for fitting of the seat to a wide range of sizes and shapes of a human body covered by a crash suit, space suit, or other protective garment. The problem is further complicated by other Orion-application-specific requirements that must be omitted here for the sake of brevity. To accommodate the wide range of crewmember body lengths within the limits on available space in the original Orion application, the design provides for taller crewmembers to pull their legs back closer toward their chests, while shorter crewmembers can allow their legs to stretch out further. The range of hip-support seat adjustments needed to effect this accommodation, as derived from NASA s Human Systems Integration Standard, was found to define a parabolic path along which the knees

  8. Development of Business Models of Low-Cost Airlines

    OpenAIRE

    Andrija Vidović; Igor Štimac; Damir Vince

    2013-01-01

    The global economic crisis that affects all industries, including the aviation industry, has forced airlines to adjust their business models to existing market conditions. Low-cost airlines, which till the onset of economic crises in most cases followed the base low-cost business model, have adapted their business model in such a way that they have implemented segments of traditional airlines business models and thus created a hybrid between traditional and low-cost business models. This pape...

  9. An analytical model for the assessment of airline expansion strategies

    OpenAIRE

    Mauricio Emboaba Moreira

    2014-01-01

    Purpose: The purpose of this article is to develop an analytical model to assess airline expansion strategies by combining generic business strategy models with airline business models. Methodology and approach: A number of airline business models are examined, as are Porter’s (1983) industry five forces that drive competition, complemented by Nalebuff/ Brandenburger’s  (1996) sixth force, and the basic elements of the general environment in which the expansion process takes place.  A system ...

  10. THE REQUIREMENTS OF DEVELOPING THE REGIONAL AIRLINE TRANPORTATION IN TURKEY

    OpenAIRE

    Ali Emre Sarilgan

    2011-01-01

    Regional airline transportation is the one of the fastest growing part of the air transportation system. The regional airlines which give the service with small size capacity and generally between large and the small cities, on short and medium range routes make a contribution to social and economic life of the regions they serve. Regional airlines also provide easily access to that regions. In Turkey, which has been in a large geography, mostly the passenger transportation is providing throu...

  11. Application of CSR Programs in the Airline Industry

    OpenAIRE

    Anttila, Timo; Kretzschmar, Annika

    2010-01-01

    The subject of this thesis was to analyze the global airline business environment and corporate social responsibility (CSR) program implementations of some well-known airlines. The research has been conducted with the assumption that corporate social responsibility theory is valid. Our purpose was to give the reader and overall impression of airline industry in general, CSR theory and its most important elements. The work is divided into two distinct parts; theory and practical analysis o...

  12. Balancing competition and cooperation: Evidence from transatlantic airline markets

    OpenAIRE

    Bilotkach, Volodymyr; Hüschelrath, Kai

    2015-01-01

    In the last two decades, airline alliances were not only successful in extending the size of their networks, but also received approvals by public authorities to intensify their cooperation through to merger-like revenue-sharing joint ventures (JVs). We empirically investigate the impact of the implementation of such joint ventures on both the respective airlines' competitive strategies as well as productive efficiency. Using U.S. DOT T100 International Segment data and applying airline-marke...

  13. The Evolution of U.S. Airline Competition

    OpenAIRE

    Severin Borenstein

    1992-01-01

    The next section reviews the evolution of the domestic airline industry since the late 1970s, when it was abruptly freed from most regulatory constraints on pricing, entry, and exit. (International air travel is considered here only as it relates to competition in the domestic industry.) The following sections will examine structure issues and strategic developments in airline competition and discuss public policy options in dealing with the airline industry.

  14. The Impact of Airline Flight Schedules on Flight Delays

    OpenAIRE

    Vinayak Deshpande; Mazhar Arıkan

    2012-01-01

    Airline flight delays have come under increased scrutiny lately in the popular press, with the Federal Aviation Administration data revealing that airline on-time performance was at its worst level in 13 years in 2007. Flight delays have been attributed to several causes such as weather conditions, airport congestion, airspace congestion, use of smaller aircraft by airlines, etc. In this paper, we examine the impact of the scheduled block time allocated for a flight, a factor controlled by ai...

  15. Mergers and acquisitions : the case of United and Continental Airlines

    OpenAIRE

    Ferreira, Jorge Miguel Braga

    2014-01-01

    The US airline industry is characterized to be an industry with a high competition mainly in the domestic segment. In order to face this competition several airlines entered in mergers and acquisitions (M&A) deals as way to consolidate its position in the market. This trend was accentuated with the global recession that brought several challenges to this industry. For this reason, the merger between United and Continental Airlines, two major US carriers, are being planned and i...

  16. Airline strategic alliances in overlapping Markets: Should policymakers be concerned?

    OpenAIRE

    Gayle, Philip; Brown, Dave

    2015-01-01

    When there is significant overlap in potential partner airlines' route networks, policymakers have expressed concern that an alliance between such airlines may facilitate collusion on price and/or service levels in the partners' overlapping markets. The contribution of our paper is to put together a structural econometric model that is able to explicitly disentangle the demand and supply effects associated with an alliance between such airlines. The estimates from our structural econometric...

  17. 75 FR 34172 - Lordstown Seating Systems, a Subsidiary of Magna Seating, Including Workers Whose Unemployment...

    Science.gov (United States)

    2010-06-16

    ... notice was published in the Federal Register on May 5, 2010 (75 FR 24751). At the request of the state... Employment and Training Administration Lordstown Seating Systems, a Subsidiary of Magna Seating, Including Workers Whose Unemployment Insurance (UI) Wages Are Reported Through Intier Automotive Seatings of...

  18. 77 FR 30885 - Clarification of Prior Interpretations of the Seat Belt and Seating Requirements for General...

    Science.gov (United States)

    2012-05-24

    ... Airplane Flight Manual (14 CFR 23.1581(j)). See 36 FR 12511; see also 14 CFR 23.562, 23.785; Legal... 121, part 91 did not require that each person have a separate seat and/or seat belt. See 36 FR 12511... Belt and Seating Requirements for General Aviation Flights AGENCY: Federal Aviation Administration...

  19. Airline business continuity and IT disaster recovery sites.

    Science.gov (United States)

    Haji, Jassim

    2016-01-01

    Business continuity is defined as the capability of the organisation to continue delivery of products or services at acceptable predefined levels following a disruptive incident. Business continuity is fast evolving to become a critical and strategic decision for any organisation. Transportation in general, and airlines in particular, is a unique sector with a specialised set of requirements, challenges and opportunities. Business continuity in the airline sector is a concept that is generally overlooked by the airline managements. This paper reviews different risks related to airline processes and will also propose solutions to these risks based on experiences and good industry practices. PMID:26897619

  20. Sediment Transportation Induced by Deep-Seated Landslides in a Debris Flow Basin in Taiwan

    Science.gov (United States)

    Lin, Meei Ling; Chen, Te Wei; Chen, Yong Sheng; Sin Jhuang, Han

    2016-04-01

    Typhoon Morakot brought huge amount of rainfall to the southern Taiwan in 2009 and caused severe landslides and debris flow hazard. After Typhoon Morakot, it was found that the volume of sediment transported by the debris flow and its effects on the affected area were much more significant compared to previous case history, which may due to the huge amount of rainfall causing significant deep-seated landslides in the basin. In this study, the effects and tendency of the sediment transportation in a river basin following deep-seated landslides caused by typhoon Morakot were evaluated. We used LiDAR, DEM, and aerial photo to identify characteristics of deep-seated landslides in a debris flow river basin, KSDF079 in Liuoguey District, Kaohsiung City, Taiwan. Eight deep-seated landslides were identified in the basin. To estimate the potential landslide volume associated with the deep-seated landslides, the stability analysis was conducted to locate the critical sliding surface, and the potential landside volume was estimated based on the estimation equation proposed by the International Geotechnical Societies' UNESCO Working Party on World Landslide Inventory (WP/WLI, 1990). The total potential landslide volume of the eight deep-seated landslides in KSDF079 basin was about 28,906,856 m3. Topographic analysis was performed by using DEM before and LiDAR derived DEM after typhoon Morakot to calculate the landslide volume transported. The result of erosion volume and deposition volume lead to a run out volume of 5,832,433 m3. The results appeared to consist well with the field condition and aerial photo. Comparing the potential landslide volume and run out volume of eight deep-seated landslides, it was found that the remaining potential landslide volume was about 80%. Field investigation and topographic analysis of the KSDF079 debris flow revealed that a significant amount of sediment deposition remained in the river channel ranging from the middle to the downstream

  1. Identifying Strategic Factors of the Implantation CSR in the Airline Industry: The Case of Asia-Pacific Airlines

    Directory of Open Access Journals (Sweden)

    Dong-Shang Chang

    2015-06-01

    Full Text Available Sustainable development has always been the objective of many fields, including the tourism and transportation sector. However, a major part of this sector, the airline industry, deals with many negative impacts, such as air pollution, noise, CO2 emission, and labor practice. Corporate social responsibility (CSR is a strategic business activity that can enhance the sustainability of the airline industry. The results of the Dow Jones Sustainability Indices (DJSI reveal that airlines of Western countries exhibit a more remarkable CSR performance than Asia-Pacific airlines, suggesting that the CSR programs of Asia-Pacific airlines need improvement. By constructing an evaluation hierarchy and applying the decision-making trial and evaluation laboratory (DEMATEL method, this study found that the key strategic factors in the airline industry’s implementation of CSR include corporate governance, risk and crisis management, brand management, and product responsibility (safety.

  2. An Analysis of Airline Costs. Lecture Notes for MIT Courses. 16.73 Airline Management and Marketing

    Science.gov (United States)

    Simpson, R. W.

    1972-01-01

    The cost analyst must understand the operations of the airline and how the activities of the airline are measured, as well as how the costs are incurred and recorded. The data source is usually a cost accounting process. This provides data on the cumulated expenses in various categories over a time period like a quarter, or year, and must be correlated by the analyst with cumulated measures of airline activity which seem to be causing this expense.

  3. Identifying Strategic Factors of the Implantation CSR in the Airline Industry: The Case of Asia-Pacific Airlines

    OpenAIRE

    Dong-Shang Chang; Sheng-Hung Chen; Chia-Wei Hsu; Allen H. Hu

    2015-01-01

    Sustainable development has always been the objective of many fields, including the tourism and transportation sector. However, a major part of this sector, the airline industry, deals with many negative impacts, such as air pollution, noise, CO 2 emission, and labor practice. Corporate social responsibility (CSR) is a strategic business activity that can enhance the sustainability of the airline industry. The results of the Dow Jones Sustainability Indices (DJSI) reveal that airlines of West...

  4. Literature review of the passenger airline business models: Full service carrier, low-cost carrier and charter airlines

    OpenAIRE

    Carmona Benitez, R.B.; Lodewijks, G.

    2008-01-01

    The deregulation and liberalization of the air transportation industry have developed three main passenger business models: full service carriers, low-cost carriers, and charter airlines. Deregulation removed regulated fares and routes increasing competition and yields. Airlines business models main objectives are to minimize operation costs and fares, and to maximize profits based on cost leadership, differentiation and focus strategy. This paper presents a literature review about airline bu...

  5. Electrical Connector Mechanical Seating Sensor

    Science.gov (United States)

    Arens, Ellen; Captain, Janine; Youngquist, Robert

    2011-01-01

    A sensor provides a measurement of the degree of seating of an electrical connector. This sensor provides a number of discrete distances that a plug is inserted into a socket or receptacle. The number of measurements is equal to the number of pins available in the connector for sensing. On at least two occasions, the Shuttle Program has suffered serious time delays and incurred excessive costs simply because a plug was not seated well within a receptacle. Two methods were designed to address this problem: (1) the resistive pin technique and (2) the discrete length pins technique. In the resistive pin approach, a standard pin in a male connector is replaced with a pin that has a uniform resistivity along its length. This provides a variable resistance on that pin that is dependent on how far the pin is inserted into a socket. This is essentially a linear potentiometer. The discrete approach uses a pin (or a few pins) in the connector as a displacement indicator by truncating the pin length so it sits shorter in the connector than the other pins. A loss of signal on this pin would indicate a discrete amount of displacement of the connector. This approach would only give discrete values of connector displacement, and at least one pin would be needed for each displacement value that would be of interest.

  6. Inventory Signals

    OpenAIRE

    Lai, Richard

    2006-01-01

    Among practitioners, inventory is often thought to be the root of all evil in operations management. The stock market hates it, the media abhors it, and managers have come to fear it. But high inventory levels can also be the result of strategic buying and high-availability strategies. The problem is that when the market sees lots of inventory, it cannot tell whether it is because of poor or smart operations. We hypothesize that inventory has a signaling role. In our model, publicly- traded f...

  7. 14 CFR 23.1524 - Maximum passenger seating configuration.

    Science.gov (United States)

    2010-01-01

    ... 14 Aeronautics and Space 1 2010-01-01 2010-01-01 false Maximum passenger seating configuration. 23... Operating Limitations and Information § 23.1524 Maximum passenger seating configuration. The maximum passenger seating configuration must be established....

  8. Technical note: Spine loading in automotive seating

    NARCIS (Netherlands)

    Zenk, R.; Franz, M.; Bubb, H.; Vink, P.

    2012-01-01

    For car manufacturers, seat comfort is becoming more important in distinguishing themselves from their competitors. Therefore, many studies on participative seat comfort are carried out. In this paper, an objective assessment approach is reported which evaluates the concept of "optimal load distribu

  9. Rear-facing car seat (image)

    Science.gov (United States)

    A rear-facing car seat position is recommended for a child who is very young. Extreme injury can occur in an accident because ... child. In a frontal crash a rear-facing car seat is best, because it cradles the head, ...

  10. Entertainment and Pacification System For Car Seat

    Science.gov (United States)

    Elrod, Susan Vinz (Inventor); Dabney, Richard W. (Inventor)

    2006-01-01

    An entertainment and pacification system for use with a child car seat has speakers mounted in the child car seat with a plurality of audio sources and an anti-noise audio system coupled to the child car seat. A controllable switching system provides for, at any given time, the selective activation of i) one of the audio sources such that the audio signal generated thereby is coupled to one or more of the speakers, and ii) the anti-noise audio system such that an ambient-noise-canceling audio signal generated thereby is coupled to one or more of the speakers. The controllable switching system can receive commands generated at one of first controls located at the child car seat and second controls located remotely with respect to the child car seat with commands generated by the second controls overriding commands generated by the first controls.

  11. System for controlling child safety seat environment

    Science.gov (United States)

    Dabney, Richard W. (Inventor); Elrod, Susan V. (Inventor)

    2008-01-01

    A system is provided to control the environment experienced by a child in a child safety seat. Each of a plurality of thermoelectric elements is individually controllable to be one of heated and cooled relative to an ambient temperature. A first portion of the thermoelectric elements are positioned on the child safety seat such that a child sitting therein is positioned thereover. A ventilator coupled to the child safety seat moves air past a second portion of the thermoelectric elements and filters the air moved therepast. One or more jets coupled to the ventilator receive the filtered air. Each jet is coupled to the child safety seat and can be positioned to direct the heated/cooled filtered air to the vicinity of the head of the child sitting in the child safety seat.

  12. Inventory and inventory-taking

    OpenAIRE

    Keltnerová, Petra

    2013-01-01

    Inventory is an extensive process, which is one of the few methods to control for accuracy of accounting. Accounting under obligation upon the low is necessary lead completely, demonstrably and correctly. The main theme of the bachelor thesis is to characterize the inventory and warehouse management in the specific company. The bachelor thesis is formed (consists) of theoretical basis and a case study. The theoretical part characterizes the inventory in several stages and stock records, where...

  13. Crew coordination concepts: Continental Airlines CRM training

    Science.gov (United States)

    Christian, Darryl; Morgan, Alice

    1987-01-01

    The outline of the crew coordination concepts at Continental airlines is: (1) Present relevant theory: Contained in a pre-work package and in lecture/discussion form during the work course, (2) Discuss case examples: Contained in the pre-work for study and use during the course; and (3) Simulate practice problems: Introduced during the course as the beginning of an ongoing process. These concepts which are designed to address the problem pilots have in understanding the interaction between situations and their own theories of practice are briefly discussed.

  14. Comparison of airline passenger oxygen systems.

    Science.gov (United States)

    Byrne, N J

    1995-08-01

    The principal sources of oxygen for inflight passenger use, scheduled and unscheduled, are examined. Present practices of assessment of the passenger's "fitness to fly" are described. Three partner airlines, British Airways, U.S. Air, and Qantas, catering for more than 8000 oxygen requests annually, are compared. Analysis of customer use suggests that medical oxygen requests are frequently not clinically justified. The growth in demand, for both scheduled and unscheduled use of an expensive resource, supports the need for a "recommended best practice" among carriers. Passengers with respiratory disorders who will most benefit from inflight oxygen are vulnerable either to hypoxia or asthma. PMID:7487813

  15. The Russian airline industry: contestable market or…?

    Directory of Open Access Journals (Sweden)

    Nadezda Kislyak

    2009-10-01

    Full Text Available The authors, based on the complete survey of Russian airlines that was conducted in winter of 2006-2007, analyze essential entry-barriers in the industry, and econometrically estimate efficiency of methods for overcoming entry-barriers in the Russian PAI. They find that there are significant technological and behavioral entrybarriers in the industry. The paper doubts that this industry is contestable in contemporary Russia, although it is typically contestable in Europe and the USA. Econometric estimation of entry-barriers points that administrative barriers are the most significant restrictions of competition.

  16. Cosmic radiation exposure to airline flight passenger

    International Nuclear Information System (INIS)

    At the high altitudes, airline flight passengers can be exposed to some levels of cosmic radiation. The purpose of this study was to quantify this radiation exposure. Cosmic radiation was measured during 5 flights using a personal dosimeter (PDM-102, Aloka). Cosmic radiation equivalent dose rates ranged from 0.7 to 1.43 microsieverts per hour, the average rate was 1.08. For the passenger who travels only occasionally, the cosmic radiation levels are well below occupational limits, and the risks are extremely small. (author)

  17. ANALYZING APPROACHES TO EVALUATING AIRLINES PERFORMANCE

    Directory of Open Access Journals (Sweden)

    O. Marusych

    2014-09-01

    Full Text Available Currently, understanding of what constitutes a business process, what internal factors impact the company's performance make airlines review the methods for assessing their performance. To assess the profitability of the processes, several different methods were developed whose approbation proved both their popularity and the reliability of the results: the concept of the economic value added (EVA, a Balanced Scorecard (BSC and the process-oriented cost-benefit analysis (BPA. The concept of the economic value added is now claiming to play a leading role in determining the shapes and structural elements of the methodology of corporate governance in the world. The system of parameters that characterize the activities of an airline within the concept of cost management, has constantly been updated. With the introduction of modern information technologies, appearing of new ideas the parameters are becoming more objective and complex. Despite the fact that the system of parameters is an indicator of the general state of an enterprise, it would be wrong to only limit oneself to their analysis. In order to immediately prevent or solve any problems arising at a plant, a system of timely and reliable indicators performance is required to most fully evaluate the efficiency of an airline as a whole. Such a system is a balanced system of efficiency indexes. It can significantly improve the quality of business management, especially if a company has several activities. By means of this technique it is possible to assess the effectiveness of not only individual investments or projects, but also of entire companies or commercial entities. The problem of a balanced scorecard is that it does not solve the fundamental problems of performance measurement and gives guidelines how to combine diverse indicators into an overall assessment of effectiveness. This problem of a combination of different types of indicators is resolved through a process-oriented analysis of

  18. Brief Analysis of E-business in China Southern Airlines

    Institute of Scientific and Technical Information of China (English)

    刘航; 崔涛; 焦斌

    2007-01-01

    The rapid growth of internet is causing another industrial revolution. Developing E-business is necessary for Chinese airlines to keep their competitive advantages. It is quite urgent for China Southern Airlines to enlarge and improve its E-business strategies so that it can consolidate its leading position in this market segment.

  19. 77 FR 25105 - Reporting of Ancillary Airline Passenger Revenues

    Science.gov (United States)

    2012-04-27

    ... wheelchairs and scooters used by passengers with disabilities. See 76 FR 41726. You may review comments to... Office of the Secretary 14 CFR Parts 234 and 241 RIN 2139-AA13 Reporting of Ancillary Airline Passenger... (NPRM) issued on July 15, 2011. The NPRM proposed changes regarding reporting of airline...

  20. Design of Publicity Activity for Special Purpose Airline

    OpenAIRE

    Irina Gerasimenko

    2014-01-01

    The features of publicity activity for special purpose airline are considered in the article. The possible ways of planning of publicity activity for special purpose airline are offered at implementation of agro aviation works. Theoretical bases of advancement of agro aviation works in the agrarian market of Ukraine are presented. The model of planning of advertising is developed in relation to its periodicity.

  1. Seat PG鲸吞WLW

    Institute of Scientific and Technical Information of China (English)

    2007-01-01

    10月5日,Seat Pagine Gialle S.P.A.(简称Seat)向媒体宣称,该公司已经成功从Eniro AB手中完全购买了“Wer liefert was”(简称WLW),拥有了WLW公司100%的股份。据透露,此次交易市值估计为1.15亿欧元(相当于约1.54亿美元),经由德国联邦竞争主管机关审核通过,而本次收购所需资金主要是源自于经营性现金流。

  2. Trade inventories

    OpenAIRE

    Jonathan McCarthy; Egon Zakrajsek

    1998-01-01

    We examine the behavior of trade inventories using both industry-level and high-frequency firm-level data. The cost structure underlying the firm's optimization problem--convex delivery costs vs. fixed costs of ordering--provides the two competing hypotheses. In the presence of fixed costs (S,s) inventory policies are optimal, and steady-state reduced-form predictions regarding the dynamics of inventories and sales can be used to test the model. The alternative of convex delivery costs is pro...

  3. Reduced gravity fecal collector seat and urinal

    Science.gov (United States)

    Brown, J. W. (Inventor)

    1974-01-01

    A waste collection system for use in a reduced gravity including a seat having an opening centrally located with a pair of opposed depressed valleys on opposite sides of said opening for accommodating the ischial tuberosities of a user. The seat has contoured surfaces for providing support of the user's body and includes a prominent ridge towards the rear, which provides forward-aft positioning cue to the user. A curved recess is provided adjacent the forward portion of the seat for accommodating a tubular urinal having an enlarged open mouth.

  4. Evaluation of Seat Comfort of Office Armchairs: an Impact of Articulated Seat Support and Gas Spring

    Directory of Open Access Journals (Sweden)

    Jerzy Smardzewski

    2014-09-01

    Full Text Available This paper describes the application of an alternative seating system. The aim of this alternative approach was to determine the comfort of offi ce armchairs equipped with new construction solutions ensuring articulated support of the seat as well as articulated mounting of the gas spring. An offi ce armchair with a different seat support and gas spring was selected. Operational loads were applied to the seat surface. The following parameters were measured and calculated in the course of the performed experiments: contact area, average contact pressure and coeffi cient of seat pressure distribution (SPD. A new discomfort coeffi cient D expressing seat quality was elaborated. Preliminary data suggests that the prototypes provided greater sitting comfort than did the conventional chair. It was demonstrated that the new construction solution of the gas spring support guaranteed the highest comfort of the use of the examined armchairs.

  5. Riparian Inventory

    Data.gov (United States)

    Kansas Data Access and Support Center — This dataset is a digital representation of the 1:24,000 Land Use Riparian Areas Inventory for the state of Kansas. The dataset includes a 100 foot buffer around...

  6. Identifying airline cost economies: An econometric analysis of the factors affecting aircraft opeerating costs

    NARCIS (Netherlands)

    J. Zuidberg

    2014-01-01

    This paper provides the results of an econometric analysis of the influences of airline characteristics on the average operating costs per aircraft movement. The analysis combines a comprehensive selection of airline-output variables, airline-fleet variables, and airline-market variables. The result

  7. European airlines enter the biofuels market. Business Project Report

    Energy Technology Data Exchange (ETDEWEB)

    Van den Heuvel, E.

    2011-06-15

    Biofuels might offer opportunities for achieving improved balance of power to the European airlines in their market environment. The aviation sector in Europe is a high competitive market. It faces high rivalry and increasing fuel costs due to rising oil prices. Moreover, from 2012 the sector will be subject to stringent rules with respect to maximum allowed carbon emissions. Investigating the competitive forces in the aviation sector and executing a strategic group analysis maps the competitors and the major players in the supply chain and the options they have for using alternative fuels for low carbon performance. Both the market and non-market strategies of several European airlines have been studied. It appears that airlines are aiming at first mover advantage by moving upstream in the biofuel value chain. They search for collaboration with other stakeholders to change government regulation to their benefit and influence public opinion and research agendas. Airlines are late entrants in the biofuels market. This research has shown that biofuels can improve the market power balance for European airlines. Biofuels are key to improve the carbon performance of airlines. However, this implies that airlines take position at the resource side of the value chain for biojetfuels. This has the advantage of controlling the security of supply and managing biofuels production complying to ruling sustainability criteria.

  8. Measuring the Malindo Airline Passenger’s Satisfaction

    Directory of Open Access Journals (Sweden)

    Zakaria Wahab

    2015-06-01

    Full Text Available Quality of service has become a tool to improve the passenger’s value that lead to their satisfaction level and retains loyalty. This study conducted in evaluating the Malindo Airline passenger’s satisfaction of Low Cost Carrier (LCC in Malaysia. The purpose of this research is to evaluate the level of quality of service provided by Malindo Airline. In addition, the aim of this study is to identify the impact of quality of service and Malindo Airline passenger’s satisfaction. The sample for this research is the passenger’s of Malindo Airline in Kuala Lumpur. Convenience sampling was used in this study. Questionnaires have been distributed to 200 respondents in Subang Jaya Airport and KLIA 2. SPSS version 18.0 was used to analyse the data collected. Descriptive analysis, Pearson correlation, multiple regression, model are used to test on the impact of quality of service on Malindo Airline passenger’s satisfaction. The results showed that there is a positive correlation between quality of service and Malindo Airline passenger’s satisfaction among passenger’s of Malindo Airline

  9. 28 CFR 36.308 - Seating in assembly areas.

    Science.gov (United States)

    2010-07-01

    ... 28 Judicial Administration 1 2010-07-01 2010-07-01 false Seating in assembly areas. 36.308 Section... PUBLIC ACCOMMODATIONS AND IN COMMERCIAL FACILITIES Specific Requirements § 36.308 Seating in assembly... in assembly areas shall— (i) Provide a reasonable number of wheelchair seating spaces and seats...

  10. Service Parts Inventory Control with Lateral Transshipment that takes Time

    OpenAIRE

    Yang, Guangyuan; Dekker, Rommert

    2010-01-01

    textabstractIn equipment-intensive industries such as truck manufacturing, electronics manufacturing, photo copiers, and airliners, service parts are often slow moving items for which, in some cases, the transshipment time is not negligible. However, this aspect is hardly considered in the existing spare parts literature. We assess the effect of non-negligible lateral transshipment time on various aspects of spare parts inventory control. Furthermore, we introduce customer-oriented service le...

  11. Using an experimental bicycle seat to reduce perineal numbness.

    Science.gov (United States)

    Taylor, Kenneth S; Richburg, Allen; Wallis, David; Bracker, Mark

    2002-05-01

    Researchers evaluated the effectiveness of an experimental seat that was designed to prevent perineal numbness and possibly erectile dysfunction in male bicyclists. A trial of the device among 15 experienced cyclists measured perineal sensation after a 1-hour stationary cycling session on a standard seat followed several days later by the same exercise protocol on the experimental bike seat. Cyclists reported more numbness with the standard seat than with the experimental seat (79% vs 14%). Sensory testing found greater hypoesthesia with the standard seat. Innovations in bicycle seat design may decrease or eliminate perineal numbness. PMID:20086525

  12. A liberalised South African airline industry: Measuring airline total-factor productivity

    Directory of Open Access Journals (Sweden)

    Anton Brits

    2010-11-01

    Full Text Available The liberalisation of the South African airline industry through economic deregulation established competitive domestic and international markets. Sustainability of air transport, subject to these liberalisation effects, depends on efficient management information such as total-factor productivity, which necessitates comprehensive financial and operational information. Total-factor productivity in general, however, is not utilised by airlines as a key performance indicator since the measuring thereof is complex and regarded as tedious. Changes in air transport total-factor productivity can be measured in two ways. First, an index approach can be adopted that shows the proportional change in the inputs in relation to a proportional change in output. Secondly, a production function can be determined (econometric approach that shows a change of productivity as a shift in the production curve. The research on which the article is based, exploited the theory, selection and application of an appropriate approach to determine changes of total-factor productivity of an individual airline to assist/support efficient decisionmaking by management.

  13. Crashworthiness of composite seats for civil aircraft

    OpenAIRE

    Stephens, V. M.

    1992-01-01

    A study has been conducted into the design of civil aircraft seats which are forward-facing and use the lap-belt method of restraint. Within these terms of reference, the response of the seat restraint occupant system (SROS) to impact loading has been analysed using physical (dynamic testing) and analytical (computer simulation) modelling techniques. With the increasing use of fibre-reinforced polymer composites in aircraft for weight efficiency, and the consequent appearance of composite se...

  14. Airline Maintenance Manpower Optimization from the De Novo Perspective

    Science.gov (United States)

    Liou, James J. H.; Tzeng, Gwo-Hshiung

    Human resource management (HRM) is an important issue for today’s competitive airline marketing. In this paper, we discuss a multi-objective model designed from the De Novo perspective to help airlines optimize their maintenance manpower portfolio. The effectiveness of the model and solution algorithm is demonstrated in an empirical study of the optimization of the human resources needed for airline line maintenance. Both De Novo and traditional multiple objective programming (MOP) methods are analyzed. A comparison of the results with those of traditional MOP indicates that the proposed model and solution algorithm does provide better performance and an improved human resource portfolio.

  15. Measuring the Malindo Airline Passenger’s Satisfaction

    OpenAIRE

    Zakaria Wahab; Inda Sukati; Lee Hua Li

    2015-01-01

    Quality of service has become a tool to improve the passenger’s value that lead to their satisfaction level and retains loyalty. This study conducted in evaluating the Malindo Airline passenger’s satisfaction of Low Cost Carrier (LCC) in Malaysia. The purpose of this research is to evaluate the level of quality of service provided by Malindo Airline. In addition, the aim of this study is to identify the impact of quality of service and Malindo Airline passenger’s satisfaction. The sample for ...

  16. Application of Core Theory to the Airline Industry

    Science.gov (United States)

    Raghavan, Sunder

    2003-01-01

    Competition in the airline industry has been fierce since the industry was deregulated in 1978. The proponents of deregulation believed that more competition would improve efficiency and reduce prices and bring overall benefits to the consumer. In this paper, a case is made based on core theory that under certain demand and cost conditions more competition can actually lead to harmful consequences for industries like the airline industry or cause an empty core problem. Practices like monopolies, cartels, price discrimination, which is considered inefficient allocation of resources in many other industries, can actually be beneficial in the case of the airline industry in bringing about an efficient equilibrium.

  17. Air Travel and TB: an airline perspective.

    Science.gov (United States)

    Dowdall, Nigel P; Evans, Anthony D; Thibeault, Claude

    2010-03-01

    The commercial airline industry in the 21st century is a global business, able to transport large numbers of people to almost any part of the world within a few hours. There has long been concern in public health circles about the potential for transmission of communicable diseases, such as TB, on board aircraft. The recent threats from novel and emerging infectious diseases including SARS and pandemic flu has facilitated unprecedented levels of cooperation between international industry representatives, regulators and public health authorities in addressing the issues of air travel and communicable disease. This paper reviews the regulatory environment, ways in which the risks are mitigated through aspects of aircraft design, opportunities for prevention by identifying individuals who may be suffering from a communicable disease prior to flight and the approach used in managing suspected cases of communicable disease on board aircraft. PMID:20478517

  18. Seat belt use law in developing countries

    Institute of Scientific and Technical Information of China (English)

    SangWanLee

    1999-01-01

    Objective:To highlight the way to successful implementation of mandantory seat belt use law in developing countries particulary where have significant increase in number or cars and subsequent increase in car occupant casualties.Methods:Literatures concerning seat belt use were reviewed and experiences of the world.Satisfactory or not,investigated.It summed up general aspects of seat belt use as well as benefits,attitude toward legislation and measures to enhance the usage.Results:Seat belt use has been proven and stood time tested as the most effective means to protect car occupants from road crash injuries.It appears to be arduous to achieve the golal of seat belt use law in developing countries. but possible via strategies appropriately leading to legislation and promotion of the belt usage.Conclusions:It is prime necessity for the government authorities to recognize the importance of seat belt use.There needs an organizational structure composed of relevant professional from both private and government sectors which is able to carry out every steps toward successful legislation and implementation:education,publicity,enforcement,evaluation and dissemination of the law's benefits.

  19. Determinants of Intention to Purchase Online Airline Ticket

    Directory of Open Access Journals (Sweden)

    alireza Hadadian

    2014-07-01

    Full Text Available Nowadays development of information technology has caused online shopping continues to gain more acceptance by travelers that make airlines be care about factors affecting online ticket purchasing. Therefore, in this paper is an attempt to analyze intention to online airline ticket purchasing model according to trust, subjective norms, perceived risk, satisfaction and ease of use. The statistical population includes departure passengers of Mashhad international airport in domestic flights of September 2013 and sample size calculated for 215 passengers. Data collected by questionnaire that has appropriate validity and reliability. In addition, it is use structural equation model (SEM and Lisrel8.8 Software to analyze hypothesis. The results show higher satisfaction and trust leads to more intention to online airline ticket purchasing. Moreover, perceived risk and ease of use have indirect effect on intention to online purchasing by trust and satisfaction and it is not support significant relationship between subjective norms and intention to online airline ticket purchasing.

  20. United Airlines wind shear incident of May 31, 1984

    Science.gov (United States)

    Mccarthy, John

    1987-01-01

    An incident involving wind shear which occured on 31 May 1984 on a United Airlines aircraft is discussed by a member of the National Center for Atmospheric Research. The meteorological parameters important to this incident are detailed.

  1. High Enough? Explaining and Predicting Traveler Satisfaction Using Airline Review

    OpenAIRE

    Lacic, Emanuel; Kowald, Dominik; Lex, Elisabeth

    2016-01-01

    Air travel is one of the most frequently used means of transportation in our every-day life. Thus, it is not surprising that an increasing number of travelers share their experiences with airlines and airports in form of online reviews on the Web. In this work, we thrive to explain and uncover the features of airline reviews that contribute most to traveler satisfaction. To that end, we examine reviews crawled from the Skytrax air travel review portal. Skytrax provides four review categories ...

  2. Solving a manpower scheduling problem for airline catering using metaheuristics

    DEFF Research Database (Denmark)

    Ho, Sin C.; Leung, Janny M. Y.

    2010-01-01

    We study a manpower scheduling problem with job time-windows and job-skills compatibility constraints. This problem is motivated by airline catering operations, whereby airline meals and other supplies are delivered to aircrafts on the tarmac just before the flights take-off.  Jobs (flights) must...... simulated annealing heuristic approach to solve the problem. Computational experiments show that the tabu search approach outperforms the simulated annealing approach, and is capable of finding good solutions....

  3. Collude, compete, or both? : deregulation in the Norwegian airline industry

    OpenAIRE

    Salvanes, Kjell Gunnar; Steen, Frode; Sørgard, Lars

    1998-01-01

    The purpose of this paper is to test the nature of competition concerning price and capacity setting in the Norwegian airline industry after the deregulation in 1994. Did the two airlines, SAS and Braathens, compete on prices and capacities (competition), collude on prices and capacities (collusion) or collude on prices and compete on capacities (semicollusion)? We reject the hypothesis that they achieved collusion, and we find the observed behaviour consistent with semicollusive behaviour an...

  4. Building clusters for CRM strategies by mining airlines customer data

    OpenAIRE

    Miranda, Helena Sofia Guerreiro de

    2013-01-01

    As airlines strive to gain market share and sustain profitability in today’s economically challenging environment, they should develop new ways to optimize their frequent flyer programs while increase revenues. Aware of the challenges, airlines want to implement a customer relationship management (CRM) strategy based on customer analytics and data mining techniques to support marketing decisions. So, to achieve this goal, we have to apply clustering techniques to the company cu...

  5. MECHANISM OF RESTRUCTURING OF AIRLINES: IMPROVEMENT OF METHODOLOGICAL BASES

    OpenAIRE

    Arefiev, S.

    2014-01-01

    In this article the feasibility of using a set of performance indicators restructuring. On the basis of classification trees justified "national standards" successful restructuring airlines are recommended for monitoring the effectiveness of their current reorganization process. On the basis of a systematic approach sorted economic needs of airlines, defining priorities and restructuring. The approach to the definition of norms in the criteria for selecting the direction and type of restructu...

  6. An MDO concept for large civil airliner wings

    OpenAIRE

    Gantois, K.

    1998-01-01

    This thesis investigates the application of Multi-Disciplinary Design, Anal- ysis and Optimisation to the design of a large civil airliner, similar in size as the future A3XX. For the first time structural optimisation, manufacturing cost and aerodynamic effects are simultaneously integrated within a realistic, complex aircraft design problem: the wing box of such a large airliner. A novel multi-level system was developed to incorporate structural effects and manufacturing c...

  7. Analysis of online marketing communication of the airlines

    OpenAIRE

    Kollárová, Monika

    2014-01-01

    The thesis deals with the use of online marketing by airlines, while emphasis is placed on social media and viral marketing campaigns. The aim is to identify the requirements for successful online marketing communication. In the theoretical part the specific features of the airline industry are characterized and PEST analysis of the aviation industry is performed. This part of the thesis also defines and characterizes the main forms of online marketing used in aviation. The practical part com...

  8. AirTicket Sales as Bids from Airline Alliances

    OpenAIRE

    Ivaldi, Marc; Petrova, Milena; Urdanoz, Miguel

    2014-01-01

    Motivated by the higher price sensitivity and service homogenisation in the airline industry in recent years, we propose a new methodology to deal with transaction prices and to estimate the effect of alliances in the US domestic market. The assumption that airlines compete on price allows us to take advantage of the observational equivalence between Bertrand competition and the reverse English auction. We then apply an MLE method, developed by Paarsch (1997) for esti- mating auctions, to rec...

  9. Air Ticket Sales as Bids from Airline Alliances

    OpenAIRE

    Ivaldi, Marc; Petrova, Milena; Urdanoz, Miguel

    2015-01-01

    Motivated by the higher price sensitivity and service homogenisation in the airline industry in recent years, we propose a new methodology to deal with transaction prices and to estimate the effect of alliances in the US domestic market. The assumption that airlines compete on price allows us to take advantage of the observational equivalence between Bertrand competition and the reverse English auction. We then apply an MLE method, developed by Paarsch (1997) for estimating auctions, to recov...

  10. Airline Overbooking in the Multi-Class Case

    OpenAIRE

    Coughlan, Joseph

    1999-01-01

    This paper presents an airline overbooking model at a class level for one servcie compartment-cabin. Class level demand data i sused to determine the number of bookings that can be taken for each class. The model is optimised through the use of mulit-dimentsional search routines. The control level model developed is tested with data supplied by Ireland's national airline, Aer Lingus. The model shows a significant improvement over previous methods employed by Aer Lingus and was subsequently ad...

  11. Influence of Capacity Constraints on Airline Fleet Mix

    OpenAIRE

    Hansen, Mark M.; Gosling, Geoffrey D.; Margulici, Jean-David; Wei, Wen-Bin

    2001-01-01

    This report documents the findings of research sponsored by the Los Angeles World Airports to examine the influence of airport capacity constraints on airline fleet mix and to explore the potential effects of policy options to influence airlines to use larger aircraft types and thereby accommodate growth in passenger or cargo demand without a corresponding increase in the number of aircraft operations. This issue is of growing importance at many major airports in the United States and indeed ...

  12. A Strategic Analysis of the Oneworld Airline Alliance

    OpenAIRE

    Atkinson, Russell M.

    2011-01-01

    Global airline alliances enable member airlines to increase profits. They achieve this by increasing customer willingness to pay and reducing costs. Deep levels of partnerships are required to drive these benefits. The ability for partners to closely integrate is largely dependent on antitrust immunities being granted by regulators, which enable joint venture partnerships. The Oneworld alliance is poised to capitalize on a recent decision by the United States Department of Transportation and ...

  13. Determinants of Intention to Purchase Online Airline Ticket

    OpenAIRE

    alireza Hadadian; Amirhossein Bagherieh

    2014-01-01

    Nowadays development of information technology has caused online shopping continues to gain more acceptance by travelers that make airlines be care about factors affecting online ticket purchasing. Therefore, in this paper is an attempt to analyze intention to online airline ticket purchasing model according to trust, subjective norms, perceived risk, satisfaction and ease of use. The statistical population includes departure passengers of Mashhad international airport in domestic flights of ...

  14. Design of Publicity Activity for Special Purpose Airline

    Directory of Open Access Journals (Sweden)

    Irina Gerasimenko

    2014-12-01

    Full Text Available The features of publicity activity for special purpose airline are considered in the article. The possible ways of planning of publicity activity for special purpose airline are offered at implementation of agro aviation works. Theoretical bases of advancement of agro aviation works in the agrarian market of Ukraine are presented. The model of planning of advertising is developed in relation to its periodicity.

  15. How airlines decide the average size of airplanes in Brazilian market? Study of the determinants and projections for the next decade [paper in Portuguese

    Directory of Open Access Journals (Sweden)

    Thyago Silva Hermeto

    2012-01-01

    Full Text Available In Brazilian market, all airlines companies have a complex problem to solve, regarding the ideal profile for the aircraft fleet: Embraer`s aircraft profile (availability of seats 100 passengers aircraft or Boeing or Airbus profile (available above 140 seats? To answer this question is necessary to think about the following boundary conditions: (1 the organic growth of passangers at a rate of 11,8%/year (2003-2008, (2 physical limitations of the major airports - the ability of the passenger terminal, number of lanes, number of slots in the apron area, (3 the rate of completion of infrastructure works in this short of monitoring the speed of demand growth displayed until the present moment. To address this issue, this econometric study presents the evolution of the average size of aircraft used in Brazil. The middle step practiced by airlines is the variable that causes the choice for larger aircraft, with elasticity of 37,9%, in contrast, GDP growth leads to a choice of smaller aircraft, elasticity of –17,6%. The conclusion is that neutral scenario proved to be more consistent with market reality, there is an initial decrease of 6.5% over the average size of the aircraft in July 2010 and July 2020 shows an increase of 9.8%.

  16. An analytical model for the assessment of airline expansion strategies

    Directory of Open Access Journals (Sweden)

    Mauricio Emboaba Moreira

    2014-01-01

    Full Text Available Purpose: The purpose of this article is to develop an analytical model to assess airline expansion strategies by combining generic business strategy models with airline business models. Methodology and approach: A number of airline business models are examined, as are Porter’s (1983 industry five forces that drive competition, complemented by Nalebuff/ Brandenburger’s  (1996 sixth force, and the basic elements of the general environment in which the expansion process takes place.  A system of points and weights is developed to create a score among the 904,736 possible combinations considered. The model’s outputs are generic expansion strategies with quantitative assessments for each specific combination of elements inputted. Originality and value: The analytical model developed is original because it combines for the first time and explicitly elements of the general environment, industry environment, airline business models and the generic expansion strategy types. Besides it creates a system of scores that may be used to drive the decision process toward the choice of a specific strategic expansion path. Research implications: The analytical model may be adapted to other industries apart from the airline industry by substituting the element “airline business model” by other industries corresponding elements related to the different specific business models.

  17. 76 FR 9551 - Availability of Seats for the Monitor National Marine Sanctuary Advisory Council

    Science.gov (United States)

    2011-02-18

    .../Commercial Fishing seats, Heritage Tourism seat, and Economic Development seat. Applicants are chosen based... Development, Education, Heritage Tourism, Maritime Archaeological Research, North Carolina Maritime...

  18. Seating Considerations for Spaceflight: The Human to Machine Interface

    Science.gov (United States)

    Gohmert, Dustin M.

    2011-01-01

    Seating is one of the most critical components to be considered during design of a spacecraft. Since seats are the final interface between the occupant and the vehicle wherein all launch and landing operations are performed, significant effort must be spent to ensure proper integration of the human to the spacecraft. The importance of seating can be divided into two categories: seat layout and seat design. The layout of the seats drives the overall cabin configuration - from displays and controls, to windows, to stowage, to egress paths. Since the layout of the seats is such a critical design parameter within the crew compartment, it is one of the first design challenges that must be completed in the critical path of the spacecraft design. In consideration of seat layout in the vehicle, it is important for the designers to account for often intangible factors such as safety, operability, contingency performance, crew rescue. Seat layout will lead to definition of the quantity, shape, and posture of the seats. The seats of the craft must restrain and protect the occupant in all seated phases of flight, while allowing for nominal mission performance. In design of a spacecraft seat, the general posture of the occupant and the landing loads to be encountered are the greatest drivers of overall design. Variances, such as upright versus recumbent postures will dictate fit of the seat to the occupant and drive the total envelope of the seat around the occupant. Seat design revolves around applying sound principles of seated occupant protection coupled with the unique environments driven by the seat layout, landing loads, and operational and emergency scenarios.

  19. Airline Brand Loyalty: A case study involving the three airlines, - SAS, Norwegian and Widerøe

    OpenAIRE

    Shrestha, Basant Raj

    2014-01-01

    1.0 Abstract The general object of this study is to explore the airline brand loyalty. The primary objective of this study is to explore the nature of consumer loyalty and its major determinants with respect to the three airlines - SAS, Norwegian and Widerøe; analyze the data concerning relationships between consumers' attitude, habit, satisfaction and loyalty and identify the differences concerning attitude, habit, satisfaction, loyalty and factors (service, safety, comfort, luggage a...

  20. AN INTELLIGENT MODEL FOR SALES AND INVENTORY MANAGEMENT

    Directory of Open Access Journals (Sweden)

    KARIM USMAN

    2011-10-01

    Full Text Available This work involved developing an intelligent model for sales and inventory management aimed at bridging the substantial gap between the theory and the practice of inventory management. The system developed has the capability of providing automatic demand and lead time pattern identification for inventory management. The intelligent inventory model was formulated using the concept of fuzzy logic. The identified patterns and the formulated model were translated into a rule based package developed with Java 2 Enterprise Edition (J2EE.The developed system can work perfectly with any small scale and medium enterprise, but NOBIS super market (a reputable super market within Makurdi metropolis, Benue State of Nigeria was used to test run the working principle of the system. The multi-branching nature of the system and its client server relationship even made itdeployable for manufacturing and airline industries around the globe.

  1. Robustness of airline alliance route networks

    Science.gov (United States)

    Lordan, Oriol; Sallan, Jose M.; Simo, Pep; Gonzalez-Prieto, David

    2015-05-01

    The aim of this study is to analyze the robustness of the three major airline alliances' (i.e., Star Alliance, oneworld and SkyTeam) route networks. Firstly, the normalization of a multi-scale measure of vulnerability is proposed in order to perform the analysis in networks with different sizes, i.e., number of nodes. An alternative node selection criterion is also proposed in order to study robustness and vulnerability of such complex networks, based on network efficiency. And lastly, a new procedure - the inverted adaptive strategy - is presented to sort the nodes in order to anticipate network breakdown. Finally, the robustness of the three alliance networks are analyzed with (1) a normalized multi-scale measure of vulnerability, (2) an adaptive strategy based on four different criteria and (3) an inverted adaptive strategy based on the efficiency criterion. The results show that Star Alliance has the most resilient route network, followed by SkyTeam and then oneworld. It was also shown that the inverted adaptive strategy based on the efficiency criterion - inverted efficiency - shows a great success in quickly breaking networks similar to that found with betweenness criterion but with even better results.

  2. Perception Mapping of Travelers: Case of Six Indian Domestic Airlines

    Directory of Open Access Journals (Sweden)

    Shobhit Agarwal

    2010-01-01

    Full Text Available Problem statement: A comparison of customer satisfaction based on service quality as perceived by air travelers was done among six domestic airlines. Literature review suggested that flying experience has three stages: Pre-flight, in-flight and post-flight and a set of six variables can be used to measure satisfaction. These variables are: Ease of bookings through the website/call center; Hassle free check in/efficient ticketing staff/regular announcements during flight delays at airport; on time performance of flights; in flight experience; baggage handling and value for money. Approach: A questionnaire was designed with above set of variables and responses of 150 fliers of six domestic airlines viz., GoAir, Kingfisher, Jet Airways, Indigo, SpiceJet and Air India (Domestic was recorded on a five point Likert scale. About 150 respondents were interviewed from different places in NCR: Delhi, Gurgaon, Noida, Greater Noida and Faridabad. A convenient sampling method was followed. Perceptions of only those travelers were captured who had actually undergone the experience of travelling by an airline. The range for the number of respondents was between 103 (for GoAir and 133 (for Jet Air. Results: Using one way ANOVA, it was checked whether travelers perceive any significant difference between six airlines for each of the above six identified variables. With Tukey-Kramer test the airlines which are significantly different from the rest were identified. Perceptual maps with combination of up to two variables (attributes were drawn to infer about the positioning of six different airlines. Conclusion: This study will help marketers of domestic airlines and designers of flight service offerings to enhance the satisfaction level of air travelers.

  3. Industry Consolidation and Future Airline Network Structures in Europe

    Science.gov (United States)

    Dennis, Nigel

    2003-01-01

    In the current downturn in demand for air travel, major airlines are revising and rationalizing their networks in an attempt to improve financial performance and strengthen their defences against both new entrants and traditional rivals. Expansion of commercial agreements or alliances with other airlines has become a key reaction to the increasingly competitive marketplace. In the absence, for regulatory reasons, of cross-border mergers these are the principal means by which the industry can consolidate internationally. This paper analyzes the developments which have been taking place and attempts to itentify the implications for airline network structures and the function of different hub airports. The range of services available to passengers in long-haul markets to/from Europe is evaluated before and after recent industry reorganization. Hubs are crucial to interlink the route networks of parmers in an alliance. However, duplication between nearby hub airports that find themselves within the same airline alliance can lead to loss of service at the weaker locations. The extent to which the alliance hubs in Europe duplicate or complement each other in terms of network coverage is assessed and this methodology also enables the optimal partnerships for "unattached" airlines to be identified. The future role of the various European hubs is considered under different scenarios of global alliance development. The paper concludes by considering possible longer-term developments. In an environment where the low-cost carriers will provide a major element of customer choice, it is suggested that the traditional airlines will retrench around their hubs, surrendering many secondary cities to the low-cost sector. Further reduction in the number of alliances could threaten more of the European hubs. For both regulatory and commercial reasons, the end result may be just one airline alliance - so recreating in the deregulated market the historic rule of IATA.

  4. Market Potential Study for Standing Cabin Concept for Domestic Low-Cost Commercial Airlines in Malaysia

    Science.gov (United States)

    Romli, Fairuz I.; Dasuki, Norhafizah; Yazdi Harmin, Mohammad

    2016-02-01

    An affordable air transportation has become the operational aim of many airlines these days. This is to cater the growing air travel demands from people of different social and economic status. One of the revolutionary proposals to reduce the operational costs, hence the flight ticket price, is by introducing the so-called standing cabin concept. This concept involves transporting passengers during the entire flight in their standing position with a proper support of a vertical seat. As can be expected with many new inventions, despite its clear advantages, the concept has been met with mixed reactions from the public. This study intends to establish whether the standing cabin concept has a market potential to be implemented for domestic flights in Malaysia. The public perception is determined from collected data through a survey done at two major local low-cost airport terminals. It can be concluded from the results that the concept has a good market potential for application on flights with duration of less than two hours.

  5. Even in Taxis, Kids Belong in Safety Seats

    Science.gov (United States)

    ... gov/medlineplus/news/fullstory_158608.html Even in Taxis, Kids Belong in Safety Seats But study finds ... 2, 2016 (HealthDay News) -- Small children riding in taxis often aren't in a car safety seat, ...

  6. Percentage of Drivers and Front Seat Passengers Wearing Seat Belts, 2012, Region 4 - Atlanta

    Data.gov (United States)

    U.S. Department of Health & Human Services — Source for national data: National Occupant Protection Use Survey (NOPUS), 2012. Source for state data: State Observational Survey of Seat Belt Use, 2012.

  7. Percentage of Drivers and Front Seat Passengers Wearing Seat Belts, 2012, Region 9 - San Francisco

    Data.gov (United States)

    U.S. Department of Health & Human Services — Source for national data: National Occupant Protection Use Survey (NOPUS), 2012. Source for state data: State Observational Survey of Seat Belt Use, 2012.

  8. Percentage of Drivers and Front Seat Passengers Wearing Seat Belts, 2012, Region 1 - Boston

    Data.gov (United States)

    U.S. Department of Health & Human Services — Source for national data: National Occupant Protection Use Survey (NOPUS), 2012. Source for state data: State Observational Survey of Seat Belt Use, 2012.

  9. Percentage of Drivers and Front Seat Passengers Wearing Seat Belts, 2012, Region 6 - Dallas

    Data.gov (United States)

    U.S. Department of Health & Human Services — Source for national data: National Occupant Protection Use Survey (NOPUS), 2012. Source for state data: State Observational Survey of Seat Belt Use, 2012.

  10. Percentage of Drivers and Front Seat Passengers Wearing Seat Belts, 2012, Region 5 - Chicago

    Data.gov (United States)

    U.S. Department of Health & Human Services — Source for national data: National Occupant Protection Use Survey (NOPUS), 2012. Source for state data: State Observational Survey of Seat Belt Use, 2012.

  11. Percentage of Drivers and Front Seat Passengers Wearing Seat Belts, 2012, Region 8 - Denver

    Data.gov (United States)

    U.S. Department of Health & Human Services — Source for national data: National Occupant Protection Use Survey (NOPUS), 2012. Source for state data: State Observational Survey of Seat Belt Use, 2012.

  12. Percentage of Drivers and Front Seat Passengers Wearing Seat Belts, 2012, Region 10 - Seattle

    Data.gov (United States)

    U.S. Department of Health & Human Services — Source for national data: National Occupant Protection Use Survey (NOPUS), 2012. Source for state data: State Observational Survey of Seat Belt Use, 2012.

  13. Percentage of Drivers and Front Seat Passengers Wearing Seat Belts, 2012, Region 2 - New York

    Data.gov (United States)

    U.S. Department of Health & Human Services — Source for national data: National Occupant Protection Use Survey (NOPUS), 2012. Source for state data: State Observational Survey of Seat Belt Use, 2012.

  14. Percentage of Drivers and Front Seat Passengers Wearing Seat Belts, 2012, All States

    Data.gov (United States)

    U.S. Department of Health & Human Services — Source for national data: National Occupant Protection Use Survey (NOPUS), 2012. Source for state data: State Observational Survey of Seat Belt Use, 2012.

  15. Percentage of Drivers and Front Seat Passengers Wearing Seat Belts, 2012, Region 3 - Philadelphia

    Data.gov (United States)

    U.S. Department of Health & Human Services — Source for national data: National Occupant Protection Use Survey (NOPUS), 2012. Source for state data: State Observational Survey of Seat Belt Use, 2012.

  16. 36 CFR 1192.75 - Priority seating signs.

    Science.gov (United States)

    2010-07-01

    ... 36 Parks, Forests, and Public Property 3 2010-07-01 2010-07-01 false Priority seating signs. 1192... Light Rail Vehicles and Systems § 1192.75 Priority seating signs. (a) Each vehicle shall contain sign(s... mobility aid seating locations are provided, signs shall indicate the location and advise other...

  17. 49 CFR 38.75 - Priority seating signs.

    Science.gov (United States)

    2010-10-01

    ... 49 Transportation 1 2010-10-01 2010-10-01 false Priority seating signs. 38.75 Section 38.75... SPECIFICATIONS FOR TRANSPORTATION VEHICLES Light Rail Vehicles and Systems § 38.75 Priority seating signs. (a... them. (b) Where designated wheelchair or mobility aid seating locations are provided, signs...

  18. Seat Belt Use Among Adult Workers - 21 States, 2013.

    Science.gov (United States)

    Boal, Winifred L; Li, Jia; Rodriguez-Acosta, Rosa L

    2016-01-01

    Roadway incidents involving motorized vehicles accounted for 24% of fatal occupational injuries in the United States during 2013 and were the leading cause of fatal injuries among workers.* In 2013, workers' compensation costs for serious, nonfatal injuries among work-related roadway incidents involving motorized land vehicles were estimated at $2.96 billion.(†) Seat belt use is a proven method to reduce injuries to motor vehicle occupants (1). Use of lap/shoulder seat belts reduces the risk for fatal injuries to front seat occupants of cars by 45% and the risk to light truck occupants by 60%.(§) To characterize seat belt use among adult workers by occupational group, CDC analyzed data from the 2013 Behavioral Risk Factor Surveillance System (BRFSS) and found that not always using a seat belt was significantly associated with occupational group after controlling for factors known to influence seat belt use. Occupational groups with the highest prevalences of not always using a seat belt included construction and extraction; farming, fishing, and forestry; and installation, maintenance, and repair. To increase seat belt use among persons currently employed, states can enact and enforce primary seat belt laws, employers can set and enforce safety policies requiring seat belt use by all vehicle occupants, and seat belt safety advocates can target interventions to workers in occupational groups with lower reported seat belt use. PMID:27309488

  19. LOGISTIC APPROACH TO INTERACTION BETWEEN AN AIRLINE AND A FUEL SUPPLIER

    OpenAIRE

    Wang Bo

    2015-01-01

    This article discusses optimization of jet fuel supply to airlines under conditions of the surge in jet fuel prices by forecasting of airline’s fuel demand and planning the interaction between an airline and fuel suppliers.

  20. Measuring service quality and a comparative analysis in airline industry

    Directory of Open Access Journals (Sweden)

    Mohammad Mehdi Izadi

    2013-01-01

    Full Text Available Quality of services in airline industry plays an important role in market penetration and customer retention. In this paper, we present a factor analysis to find important factors in Iranian Airline industry. The study designs a questionnaire consist of 35 questions and distribute it among 200 customers who regularly use services from 16 different airlines and they are investigated based on the implementation of factor analysis. The results of our survey determines seven important factors including physical features of the environment, Kettering, Pre-flight passenger services, Ability to respond, Reliability, Passenger service flight and Virtual Passenger Services. The paper discusses that improving these seven factors can significantly improve service quality in this sector.

  1. INVENTORY ABSTRACTION

    Energy Technology Data Exchange (ETDEWEB)

    G. Ragan

    2001-12-19

    The purpose of the inventory abstraction, which has been prepared in accordance with a technical work plan (CRWMS M&O 2000e for ICN 02 of the present analysis, and BSC 2001e for ICN 03 of the present analysis), is to: (1) Interpret the results of a series of relative dose calculations (CRWMS M&O 2000c, 2000f). (2) Recommend, including a basis thereof, a set of radionuclides that should be modeled in the Total System Performance Assessment in Support of the Site Recommendation (TSPA-SR) and the Total System Performance Assessment in Support of the Final Environmental Impact Statement (TSPA-FEIS). (3) Provide initial radionuclide inventories for the TSPA-SR and TSPA-FEIS models. (4) Answer the U.S. Nuclear Regulatory Commission (NRC)'s Issue Resolution Status Report ''Key Technical Issue: Container Life and Source Term'' (CLST IRSR) key technical issue (KTI): ''The rate at which radionuclides in SNF [spent nuclear fuel] are released from the EBS [engineered barrier system] through the oxidation and dissolution of spent fuel'' (NRC 1999, Subissue 3). The scope of the radionuclide screening analysis encompasses the period from 100 years to 10,000 years after the potential repository at Yucca Mountain is sealed for scenarios involving the breach of a waste package and subsequent degradation of the waste form as required for the TSPA-SR calculations. By extending the time period considered to one million years after repository closure, recommendations are made for the TSPA-FEIS. The waste forms included in the inventory abstraction are Commercial Spent Nuclear Fuel (CSNF), DOE Spent Nuclear Fuel (DSNF), High-Level Waste (HLW), naval Spent Nuclear Fuel (SNF), and U.S. Department of Energy (DOE) plutonium waste. The intended use of this analysis is in TSPA-SR and TSPA-FEIS. Based on the recommendations made here, models for release, transport, and possibly exposure will be developed for the isotopes that would be the highest

  2. A Discourse Analysis for Ads in Turkey: Pegasus Airlines and Anadolujet

    OpenAIRE

    Ozlem Atalik; Iki Eylul; Bahri Baran Kocak

    2015-01-01

    One of airline marketing activities is to encourage new passengers to air travel. For this purpose, mass media plays an important role to inform customers about promotions, such as tariffs and price, comfort, and service convenience of airline companies. In this context, television ads cover a large part of airline marketing activities to have passengers’ attentions. In this paper, current state of airline ads are determined within the framework of ads presentation with messages and social pe...

  3. Successful Crisis Management in the Airline Industry : A Quest for Legitimacy Through Communication?

    OpenAIRE

    Hansson, Anna; Vikström, Tomas

    2010-01-01

    This thesis explores how the legitimacy and reputation of firms that have experienced severe crises can be restored through the means of crisis management and crisis communication strategies. Our focus is on the airline industry, analyzing how three European airlines have communicated and acted towards important shareholders during and following a fatal airline accident. The airlines that have been compared are Air France, Spanair and SAS; an analysis of their press releases, press conference...

  4. The effect of rail travel time on airline fares: first evidence from the Italian passenger market.

    OpenAIRE

    Capozza, Claudia

    2015-01-01

    The empirical evidence shows that travel time is crucial for rail transport to be a competitor to air transport. However, there are no papers testing whether travel time has a direct effect on airline pricing. This paper is a step towards filling this gap. We test and quantify the effect of rail travel time on airline fares, using unique data at flight-level. We find that airlines design pricing strategies taking into consideration the travel time of competing rail transport service. Airlines...

  5. A FUZZY APPROACH TO BUSINESS TRAVEL AIRLINE SELECTION USING AN INTEGRATED AHP-TOPSIS-MSGP METHODOLOGY

    OpenAIRE

    CHIN-NUNG LIAO

    2013-01-01

    Airline selection is a multi-criteria decision-making (MCDM) problem faced in business travel. The evaluation process primarily involves the evaluation of several complex factors for selecting an airline that will best meet business travel needs. Previous studies have proposed several different methods that a company or organization can use to evaluate or select an airline. In its proposed approach to solving airline selection, this study integrates the analytical hierarchy process (AHP) with...

  6. The relationship between labor unions and safety in US airlines: Is there a "union effect?"

    Science.gov (United States)

    Zapf, Renee Catherine

    Every airline union claims to work for safety and presents anecdotes where greater airline safety has been achieved through union efforts. The effect unionization has on safety outcomes in U.S. commercial airlines, however, wasn't found to be previously tested. Studies have shown that in industries such as coal mining, retail, and construction, unionization does lead to an increase in safety. This study evaluated the safety rates of 15 major US commercial airlines to compare the difference between unionized and non-unionized airlines. These safety rates were compared based on if and how long each airline's pilots and flight attendants have been unionized, to determine if unionization had an effect on safety outcomes. The 15 airlines included in the study identified as operating most of the years between 1990 and 2013, with annual departures averaging over 130,000, available through the Bureau of Transportation Statistics. Accident and Incident information was acquired through the National Transportation Safety Board database. The number of accident and incidents divided by the total departures at each airline was used as the safety rate. Union websites provided information on unionization at the airlines. Due to the complex nature of the aviation industry, a number of confounding factors could have affected the tests, including mergers, route structures, and legislation. To help control for these confounding factors, this study was limited to airlines with a stable presence in the industry over time, which limited the number of airlines included. No significant difference was found between unionized and non-unionized airlines in this study, though the mean safety rate of unionized airlines was found be better than non-unionized airlines. This study did not take into account safety improvements that were union-backed and eventually required at all airlines, regardless of unionization. Due to the large sample size of the small population the difference in safety rate

  7. Income statements "by nature" and analysis of company performance : an application of US airlines companies

    OpenAIRE

    Stolowy, Hervé; Ding, Yuan; Baker, C. Richard

    2003-01-01

    Since September 11, 2001; and during the ensuing economic slowdown, U.S airline companies have experienced significant financial difficulties, including bankruptcies and near bankruptcies on the part of several major carriers. In an economic setting where U.S. airlines are struggling to achieve or maintain profitability, it is important for accountants, auditors and financial analysts to be able to analyze the relative performance of airline companies. In the airline industry, income statemen...

  8. 41 CFR 301-10.121 - What classes of airline accommodations are available?

    Science.gov (United States)

    2010-07-01

    ...-class. The basic class of accommodation by airlines that is normally the lowest fare offered regardless... airlines as “tourist class,” “economy class,” or as “single class” when the airline offers only one class... as full-fare economy class, and only restricted economy fares are available in the back of...

  9. 76 FR 45181 - Enhancing Airline Passenger Protections: Limited Delay of Effective Date for Certain Provisions

    Science.gov (United States)

    2011-07-28

    ... received a request from Allegiant Air and Spirit Airlines as well as Southwest Airlines to postpone or stay... Federal Register (76 FR 23110), titled ``Enhancing Airline Passenger Protections,'' containing many new... July 28, 2011. The effective date of the final rule published at 76 FR 23110, April 25, 2011,...

  10. 78 FR 6067 - BE-37: Survey of U.S. Airline Operators' Foreign Revenues and Expenses

    Science.gov (United States)

    2013-01-29

    ... Bureau of Economic Analysis XRIN 0691-XC006 BE-37: Survey of U.S. Airline Operators' Foreign Revenues and... public that it is conducting a mandatory survey titled Survey of U.S. Airline Operators' Foreign Revenues... survey is intended to collect information on U.S. airline operators' foreign revenues and expenses....

  11. 22 CFR 102.9 - Arranging for entry and travel of investigating and airline representatives.

    Science.gov (United States)

    2010-04-01

    ... and airline representatives. 102.9 Section 102.9 Foreign Relations DEPARTMENT OF STATE ECONOMIC AND... travel of investigating and airline representatives. Representatives of the Civil Aeronautics Board, the Civil Aeronautics Administration and the United States airline involved may not have the...

  12. 19 CFR 122.134 - When airline does not have in-bond liquor storeroom.

    Science.gov (United States)

    2010-04-01

    ... 19 Customs Duties 1 2010-04-01 2010-04-01 false When airline does not have in-bond liquor... SECURITY; DEPARTMENT OF THE TREASURY AIR COMMERCE REGULATIONS Aircraft Liquor Kits § 122.134 When airline... where the airline involved does not have an authorized in-bond liquor storeroom. When this occurs,...

  13. 77 FR 41371 - Proposed Information Collection; Comment Request; Foreign Airline Operators' Revenues and...

    Science.gov (United States)

    2012-07-13

    ... Bureau of Economic Analysis Proposed Information Collection; Comment Request; Foreign Airline Operators... INFORMATION: I. Abstract Form BE-9, Foreign Airline Operators' Revenues and Expenses in the United States, obtains quarterly data from U.S. offices, agents, or other representatives of foreign airline...

  14. 75 FR 21716 - Agency Information Collection; Activity Under OMB Review; Airline Service Quality Performance...

    Science.gov (United States)

    2010-04-26

    ...; Airline Service Quality Performance--Part 234 AGENCY: Research and Innovative Technology Administration... INFORMATION CONTACT: Bernie Stankus, Office of Airline Information, RTS-42, Room E36-303, RITA, BTS, 1200 New... and returned. SUPPLEMENTARY INFORMATION: OMB Approval No. 2138-0041. Title: Airline Service...

  15. 41 CFR 301-10.122 - What class of airline accommodations must I use?

    Science.gov (United States)

    2010-07-01

    ... 41 Public Contracts and Property Management 4 2010-07-01 2010-07-01 false What class of airline accommodations must I use? 301-10.122 Section 301-10.122 Public Contracts and Property Management Federal Travel... Common Carrier Transportation Airline Accommodations § 301-10.122 What class of airline...

  16. 19 CFR 122.135 - When airline has in-bond liquor storeroom.

    Science.gov (United States)

    2010-04-01

    ... 19 Customs Duties 1 2010-04-01 2010-04-01 false When airline has in-bond liquor storeroom. 122.135...; DEPARTMENT OF THE TREASURY AIR COMMERCE REGULATIONS Aircraft Liquor Kits § 122.135 When airline has in-bond... airline involved has an authorized in-bond liquor storeroom may be removed and restocked in the...

  17. “A PERSISTENT EXCEPTION TO TEXTBOOK ECONOMICS”: A HISTORICAL OVERVIEW OF INTERNATIONAL AIRLINES

    Directory of Open Access Journals (Sweden)

    Erik Benson

    2005-01-01

    Full Text Available The recent centennial of the Wright Brothers' flight stimulated study of the history of aviation in general and this historical overview of international airlines in particular. International airlines are commercial enterprises, but their history suggests that the economics behind their development was often overridden lypolitical, diplomatic, strategic, imperial, cultural, and emotional pressures. International airlines have not always been economically rational enterprises.

  18. Risk Analysis for Unintentional Slide Deployment During Airline Operations.

    Science.gov (United States)

    Ayra, Eduardo S; Insua, David Ríos; Castellanos, María Eugenia; Larbi, Lydia

    2015-09-01

    We present a risk analysis undertaken to mitigate problems in relation to the unintended deployment of slides under normal operations within a commercial airline. This type of incident entails relevant costs for the airline industry. After assessing the likelihood and severity of its consequences, we conclude that such risks need to be managed. We then evaluate the effectiveness of various countermeasures, describing and justifying the chosen ones. We also discuss several issues faced when implementing and communicating the proposed measures, thus fully illustrating the risk analysis process. PMID:26061899

  19. Network bipartivity and the transportation efficiency of European passenger airlines

    Science.gov (United States)

    Estrada, Ernesto; Gómez-Gardeñes, Jesús

    2016-06-01

    The analysis of the structural organization of the interaction network of a complex system is central to understand its functioning. Here, we focus on the analysis of the bipartivity of graphs. We first introduce a mathematical approach to quantify bipartivity and show its implementation in general and random graphs. Then, we tackle the analysis of the transportation networks of European airlines from the point of view of their bipartivity and observe significant differences between traditional and low cost carriers. Bipartivity shows also that alliances and major mergers of traditional airlines provide a way to reduce bipartivity which, in its turn, is closely related to an increase of the transportation efficiency.

  20. Evaluation of the seating of Qantas flight deck crew.

    Science.gov (United States)

    Lusted, M; Healey, S; Mandryk, J A

    1994-10-01

    In 1985 Qantas Airways (Australia) requested an ergonomics assessment of three pilots' seats so that one could be selected for fitting in all new aircraft as well replacement in existing aircraft. The Ipeco seat was chosen. In 1991, after all aircraft were fitted with the Ipeco seats, the company then requested a further evaluation of the seat to see if it was acceptable to the pilots and if there were any outstanding problems. A seat feature checklist plus a body chart discomfort rating scale was given to the total crew of 1030 pilots. The results from the 202 respondents indicated that although the pilots found the Ipeco seat an improvement on the Weber seat there were some modifications required. The main problems included insufficient adjustment range of the lumbar support area and the thigh supports, and infrequent replacement of the seat cushion. The body charts supported the checklist results in that the main areas of discomfort indicated were the buttocks and low back. Recommendations for improvements in design of the Ipeco seat, training in use and maintenance are presented. The method used in this study has application for field assessment of seating in a wide range of occupations, particularly bus drivers, truck drivers and train drivers, who spend long hours seated without being able to take breaks. PMID:15676978

  1. The Economic Benefits of Child Safety Seat Misuse Reduction Programs and Design Improvements for Children in Rear Seats

    OpenAIRE

    Zaloshnja, E.; Miller, T R

    2007-01-01

    This study finds that the break-even point for child safety seat misuse reduction programs and vehicle and seat design improvements is $121 a year per child seat in use, annual misuse reduction program cost is $6, and Lower Anchors and Tethers for Children (LATCH) cost $13 annually per seat in use (in 2004 dollars). To estimate societal injury cost savings we compared tow-away crash outcomes for children ages 0–4, traveling in child seats in the back of passenger vehicles in 1984–1986 vs. 199...

  2. La nuova sfida di SEAT Pagine Gialle

    Directory of Open Access Journals (Sweden)

    Leonardo Landini

    2008-03-01

    Full Text Available SEAT Pagine Gialle’s new challengeSEAT Pagine Gialle is a company that for over 80 years has provided information services, search and communication tools.The companies success and notoriety is built on a customer base of about 20 million families and 3 million professional operators with a continually updated technology with which it integrates with detailed geographical information that allows it to reach millions of users every day. The services the company offers include an advanced cartographic web-based search, satellite and aerial photos, the calculation of driving instructions, weather forecasts and traffic information, 360 degree views and the modelling of whole cities in 3D.

  3. Adaptive magnetorheological seat suspension for shock mitigation

    Science.gov (United States)

    Singh, Harinder J.; Wereley, Norman M.

    2013-04-01

    An adaptive magnetorheological seat suspension (AMSS) was analyzed for optimal protection of occupants from shock loads caused by the impact of a helicopter with the ground. The AMSS system consists of an adaptive linear stroke magnetorheological shock absorber (MRSA) integrated into the seat structure of a helicopter. The MRSA provides a large controllability yield force to accommodate a wide spectrum for shock mitigation. A multiple degrees-of-freedom nonlinear biodynamic model for a 50th percentile male occupant was integrated with the dynamics of MRSA and the governing equations of motion were investigated theoretically. The load-stroke profile of MRSA was optimized with the goal of minimizing the potential for injuries. The MRSA yield force and the shock absorber stroke limitations were the most crucial parameters for improved biodynamic response mitigation. An assessment of injuries based on established injury criteria for different body parts was carried out.

  4. Passengers’ perceptions of low cost airlines and full service carriers: a case study involving Ryanair, Aer Lingus, Air Asia and Malaysia Airlines

    OpenAIRE

    O'Connell, John F.; Williams, George

    2005-01-01

    Direct competition between full service airlines and no-frills carriers is intensifying across the world. US and European full service airlines have lost a significant proportion of their passengers to low cost carriers, the experience now being repeated in the domestic markets of Asia. This paper attempts to provide answers to a number of critical questions: What are the key drivers of each type of airline's business model? Is there a difference in passengers’ perceptions between low cost ca...

  5. Stock Investors’ Confidence on Low-Cost and Traditional Airlines in Asia During Financial Crisis 2007-2009 : Evidence from Air Asia and Singapore Airlines

    OpenAIRE

    Goh, Chin Fei; Tay, Karen

    2010-01-01

    The birth of low-cost carriers (LCC) in recent years, have added a new dimension to the aviation business, especially in Asia. There have been several success stories of these LCCs, compared with conventional full-serviced carriers. Two renowned airlines in Asia, Air Asia and Singapore Airlines have been chosen as our sample companies for the purpose of this research paper. Air Asia will represent the LCC segment, while Singapore Airlines is the proxy for traditional carriers. These two class...

  6. Molecular bacterial diversity and bioburden of commercial airliner cabin air

    Energy Technology Data Exchange (ETDEWEB)

    La Duc, M.T.; Stuecker, T.; Venkateswaran, K. [California Inst. of Technology, Pasadena, CA (United States). Jet Propulsion Laboratory, Biotechnology and Planetary Protection Group

    2007-11-15

    Microorganisms that exist in aircraft air systems are considered to be the primary source of microbial contamination that can lead to illness shortly after flying. More than 600 million passengers board commercial airline flights annually in the United States alone. In this study, culture-independent, biomarker-targeted bacterial enumeration and identification strategies were used to estimate total bacterial burden and diversity within the cabin air of commercial airliners. Air-impingement was used to collect samples of microorganisms from 4 flights on 2 commercial carriers. The total viable microbial population ranged from below detection limits to 4.1 x 10{sup 6} cells/m{sup 3} of air. Microbes were found to gradually accumulate from the time of passenger boarding through mid-flight. A sharp decline in bacterial abundance was then observed. Representatives of the {alpha}, {beta} and {gamma} Proteobacteria, as well as Gram-positive bacteria, were isolated in varying abundance. Airline A had large abundances of Neisseria meningitidis rRNA gene sequences and Streptococcus oralis/mitis sequences. Airline B was dominated by pseudomonas synxantha sequences as well as N. meningitidis and S. oralis/mitis. The cabin air samples housed low bacterial diversity and were typically dominated by a particular subset of bacteria, notably opportunistic pathogenic inhabitants of the human respiratory tract and oral cavity. The microbes were found largely around the ventilation ducts and gasper conduits that supply cabin air. 45 refs., 4 tabs., 3 figs.

  7. 75 FR 41579 - Submitting Airline Data via the Internet

    Science.gov (United States)

    2010-07-16

    ..., traffic, operational, and consumer reports to BTS via the Internet on December 20, 2006, (71 FR 76226.... 12866: Regulatory and Planning Review Under Executive Order No. 12866, (58 FR 51735, October 4, 1993... Transportation 14 CFR Parts 217, 234, 241, et al. Submitting Airline Data via the Internet; Final Rule...

  8. THE CONCEPT OF DETACHABLE ENGINE PYLONS IN JET AIRLINERS

    OpenAIRE

    Grudzien, Andzelika; State School of Higher Education in Chelm; Nowakowski, Przemyslaw; State School of Higher Education in Chelm; Lewandowski, Mateusz; State School of Higher Education in Chelm

    2013-01-01

    The paper provides the new conception for improvement of safety in commercial passenger flights, especially during ditching, fuel exhaustion and engine breakdown causing irreversible impossibility of re-ignition engines during the flight. This solution is designed for jet airlines with engines mounted in pylons under the wings.

  9. Mitigation of airspace congestion impact on airline networks

    DEFF Research Database (Denmark)

    Vaaben, Bo Valdemar; Larsen, Jesper

    2015-01-01

    In recent years European airspace has become increasingly congested and airlines can now observe that en-route capacity constraints are the fastest growing source of flight delays. In 2010 this source of delay accounted for 19% of all flight delays in Europe and has been increasing with an averag...... medium size European carrier and estimates a lower bound saving of several million USD....

  10. Strategic management of a family-owned airline

    DEFF Research Database (Denmark)

    Boyd, Britta; Hollensen, Svend

    2012-01-01

    external factors and the strategic management of other selected low-cost airlines. The analysis shows to what extent Cimber Sterling Group A/S as a Danish family business copes with increasing competition and critical situations, such as the volcanic ash cloud and financial crisis. Identifying the...

  11. Seafloor in the Malaysia Airlines Flight MH370 Search Area

    Science.gov (United States)

    Smith, Walter H. F.; Marks, Karen M.

    2014-05-01

    On the morning of 8 March 2014, Malaysia Airlines flight MH370, from Kuala Lumpur to Beijing, lost contact with air traffic control shortly after takeoff and vanished. While the world waited for any sign of the missing aircraft and the 239 people on board, authorities and scientists began to investigate what little information was known about the plane's actual movements.

  12. U.S. Domestic Airline Pricing, 1995-2004

    OpenAIRE

    Borenstein, Severin

    2005-01-01

    Between 1995 and 2004, I find that airline prices fell more than 20% adjusted for inflation. I also show that premia at hub airports declined and that there is now substantially less disparity between the cheaper and more expensive airports than there was a decade ago. Still, I find that prices remain quite high at a few dominated airports.

  13. Zagreb and Tenerife: Airline Accidents Involving Linguistic Factors

    Science.gov (United States)

    Cookson, Simon

    2009-01-01

    The International Civil Aviation Organization (ICAO) is currently implementing a program to improve the language proficiency of pilots and air traffic controllers worldwide. In justifying the program, ICAO has cited a number of airline accidents that were at least partly caused by language factors. Two accidents cited by ICAO are analysed in this…

  14. Estimating a Mixed Strategy: United and American Airlines

    OpenAIRE

    Golan, Amos; Karp , Larry S.; Perloff, Jeffrey M.

    1998-01-01

    We develop a generalized maximum entropy estimator that can estimate pure and mixed strategies subject to restrictions from game theory. This method avoids distributional assumptions and is consistent and efficient. We demonstrate this method by estimating the mixed strategies of duopolistic airlines.

  15. Using the Electronics Development Advantage in Creating a Buzz for the Airline Passengers

    Directory of Open Access Journals (Sweden)

    Bogdan AVRAM

    2013-12-01

    Full Text Available More and more airlines are trying to show their customers their ability to understand their needs, the market trends and the importance of technology in their lives. In response to the rapid development of the consumer electronics, the airline companies focus their attention on offering their customers the possibility to book a flight or check-in using a smartphone, spend time watching movies or be connected to the internet during the flight. Customers search for airlines who are more ”tech-geek” and opened to new technologies, which allows them to rate the airline companies through apps or connect more often with the airline through social-media. Technology has become an important part in developing and marketing the airline services for a better quality, more customer-focused and for better flight experience which ultimately makes the difference when choosing to fly an airline company.

  16. The Inventory Growth Spread

    OpenAIRE

    Belo, Frederico; Lin, Xiaoji

    2012-01-01

    Previous studies show that firms with low inventory growth outperform firms with high inventory growth in the cross-section of publicly traded firms. In addition, inventory investment is volatile and procyclical, and inventory-to-sales is persistent and countercyclical. We embed an inventory holding motive into the investment-based asset pricing framework by modeling inventory as a factor of production with convex and nonconvex adjustment costs. The augmented model simultaneously matches the ...

  17. Understanding Consumer Preference Between Low Cost Airlines and Full Service Carriers : A Study on Consumer Choice and Decisions

    OpenAIRE

    Lee, Alex Hoong Onn

    2008-01-01

    The emergence of low cost or no frills airlines in last decade or so have posed considerable threat to the businesses of traditional full service airlines. The competition between the different type of airlines have changed the landscape of the airline industry tremendously and have provided air travelers with options which are unprecedented. The aim of this study is to understand consumer preference between low cost and full service airlines and to determine what are the motivations or facto...

  18. Musculoskeletal analysis of driving fatigue: The influence of seat adjustments

    DEFF Research Database (Denmark)

    Majid, Noor Aliah binti Abdul; Abdullah, Mohd Fareez Edzuan; Jamaludin, Mohd Syahmi;

    2013-01-01

    Main causes for discomfort experienced by vehicle drivers during driving were investigated using a rigid-body model originally developed in the AnyBody Modeling System [1]. The interactions between the human body and the car-seat in various combinations of seat-pan/backrest inclinations...... that various seat adjustments (e.g., seat-pan and backrest inclinations) and the pedal spring stiffness have complex influences on the muscle activation and spinal joint forces of the human body. From the results, an optimal adjustment for the car-seat is proposed, i.e. the backrest inclination is 10......° and the seat-pan inclination is between 0º to 5 º. This study can in general capture the overall interactions between human body and environment (i.e. the maximum muscle activity and spine forces), which is thought to be the factors of driving fatigue....

  19. Designing for Comfort and Reliability in an Intelligent Car Seat

    OpenAIRE

    D.A. Wahab; N. F.A. Manan; M A Hannan; Abdullah, S.; Hussain, A

    2008-01-01

    Today, intelligent safety systems are installed in modern cars in view of minimising road hazards. An intelligent air bag system for example, comprised several subsystems that are integrated to include the weight sensor system, image sensor system, crash sensor system and tyre pressure monitoring system. These systems when poorly positioned into the car seat, will certainly affect comfort and reliability of the car seat. This research presents the design work on an intelligent car seat, which...

  20. Toilet Seat Rules: Why you Shouldn't Care

    OpenAIRE

    Marvasi, Enrico

    2008-01-01

    This paper analyzes the issue of choosing a socially efficient rule on how to leave the toilet seat. Leaving the seat as it is after usage is found to be the best rule over a wide parameters space. Using a loss function minimization approach, factors such as relative toilet usage, frequency of the down position, relative gender importance and cost elasticity to seat movements are considered. Leaving the seat as it is after usage proves to be dominating a large set of other rules that entail n...

  1. Differential Effects of Seating Arrangements on Disruptive Behavior of Fifth Grade Students during Independent Seatwork

    Science.gov (United States)

    Bicard, David F.; Ervin, Angela; Bicard, Sara C.; Baylot-Casey, Laura

    2012-01-01

    We investigated teacher versus student seat selection in the context of group and individual seating arrangements. Disruptive behavior during group seating occurred at twice the rate when students chose their seats than when the teacher chose. During individual seating, disruptive behavior occurred more than three times as often when the students…

  2. 14 CFR 382.83 - Through what mechanisms do carriers make seating accommodations?

    Science.gov (United States)

    2010-01-01

    ... seating accommodations? 382.83 Section 382.83 Aeronautics and Space OFFICE OF THE SECRETARY, DEPARTMENT OF... TRAVEL Seating Accommodations § 382.83 Through what mechanisms do carriers make seating accommodations... provide the seating accommodations required by § 382.81. (i) You must not assign these seats to...

  3. Design of a recumbent seating system

    Science.gov (United States)

    Croyle, Scott; Delarosa, Jose; George, Daren; Hinkle, Cathy; Karas, Stephen

    1993-01-01

    Future space shuttle missions presented by NASA might require the shuttle to rendezvous with the Russian space station Mir for the purpose of transporting astronauts back to earth. Due to the atrophied state of these astronauts, a special seating system must be designed for their transportation. The main functions of this seating system are to support and restrain the astronauts during normal reentry flight and to dampen some of the loading that might occur in a crash situation. Through research, the design team developed many concept variants for these functional requirements. By evaluating each variant, the concepts were eliminated until the four most attractive designs remained. The team used a decision matrix to determine the best concept to carry through embodiment. This concept involved using struts for support during reentry flight and a spring damper/shock absorber system to dampen crash landing loads. The embodiment design process consisted of defining the layout of each of the main functional components, specifically, the seat structure and the strut structure. Through the use of MCS/pal two, the design was refined until it could handle all required loads and dampen to the forces specified. The auxiliary function carriers were then considered. Following the design of these components, the complete final layout could be determined. It is concluded that the final design meets all specifications outlined in the conceptual design. The main advantages of this design are its low weight, simplicity, and large amount of function sharing between different components. The disassembly of this design could potentially present a problem because of time and size constraints involved. Overall, this design meets or exceeds all functional requirements.

  4. A sloped seat wedge can change the kinematics of the lumbar spine of seated workers with limited hip flexion.

    Science.gov (United States)

    Kim, Ji-Won; Kang, Min-Hyeok; Noh, Kyung-Hee; Kim, Jun-Seok; Oh, Jae-Seop

    2014-08-01

    [Purpose] The purpose of this study was to determine whether a wedge type seat decreases the lumbar flexion angle of seated workers with limited hip flexion. [Subjects] Twelve sedentary workers with limited hip flexion were recruited. [Methods] Three seat surfaces were used: a level surface, a forward-inclining wedge, and a backward-reclining wedge. The angles of lumbar flexion and pelvic tilt were measured using a three-dimensional motion analysis system. Differences in kinematic data of the subjects seated on the three seat surfaces were analyzed using repeated one-way analysis of variance. [Results] The degree of lumbar flexion decreased significantly when using the forward-inclining wedge compared with the level surface and backward-reclining wedge. [Conclusion] These findings suggest that sitting on a forward-inclining wedge may be useful for minimizing the compensatory lumbar flexion of individuals with limited hip flexion who work in a seated position. PMID:25202175

  5. WILDLIFE HABITAT INVENTORY

    OpenAIRE

    GÜNDOĞDU, Ebubekir

    2009-01-01

    This study focused on what does habitat mean in wildlife, which factors it contains, how to make inventory for these factors and how to analyses habitat according to chosen species. In spite of habitat inventory has various meanings for varying areas and species by examining literature on this issue the most preferred habitat inventory standards are presented in this article. Keywords: Habitat, Inventory, Mapping

  6. Will the Driver Seat Ever Be Empty?

    OpenAIRE

    Fraichard, Thierry

    2014-01-01

    Self-driving technologies have matured and improved to the point that, in the past few years, self-driving cars have been able to safely drive an impressive number of kilometers. It should be noted though that, in all cases, the driver seat was never empty: a human driver was behind the wheel, ready to take over whenever the situation dictated it. This is an interesting paradox since the point of a self-driving car is to remove the most unreliable part of the car, namely the human driver. So,...

  7. Seating Location in Large Lectures: Are Seating Preferences or Location Related to Course Performance?

    Science.gov (United States)

    Benedict, Mary Ellen; Hoag, John

    2004-01-01

    Using data on individuals taking principles of economics courses in large lecture rooms, the authors investigate whether a student's seating preference is related to success in the classroom. They find that individuals who prefer to sit near the front of the room have a higher probability of receiving As, whereas those who prefer the back have a…

  8. Forest inventory in Myanmar

    International Nuclear Information System (INIS)

    Forest inventory in Myanmar started in 1850s. Up till 1975, Myanmar Forest Department conducted forest inventories covering approximately one forest division every year. The National Forest Survey and Inventory Project funded by UNDP and assisted by FAO commenced in 1981 and the National Forest Management and Inventory project followed in 1986. Up till end March 1993, pre-investment inventory has covered 26.7 million acres, reconnaissance inventory 5.4 million acres and management inventory has carried out in 12 townships

  9. Evidence that Seat Belts are as Effective as Child Safety Seats in Preventing Death for Children Aged Two and Up

    OpenAIRE

    Steven D. Levitt

    2005-01-01

    Over the last thirty years, the use of child safety seats in motor vehicles has increased dramatically, fueled by well publicized information campaigns and legal mandates. In spite of this movement, there is relatively little empirical evidence regarding the efficacy of child safety seats relative to the much cheaper alternative of traditional seat belts. Using data from the Fatality Analysis Reporting System (FARS) on all fatal crashes in the United States from 1975-2003, I find that child s...

  10. A Sloped Seat Wedge Can Change the Kinematics of the Lumbar Spine of Seated Workers with Limited Hip Flexion

    OpenAIRE

    Kim, Ji-Won; Kang, Min-Hyeok; Noh, Kyung-Hee; Kim, Jun-Seok; Oh, Jae-Seop

    2014-01-01

    [Purpose] The purpose of this study was to determine whether a wedge type seat decreases the lumbar flexion angle of seated workers with limited hip flexion. [Subjects] Twelve sedentary workers with limited hip flexion were recruited. [Methods] Three seat surfaces were used: a level surface, a forward-inclining wedge, and a backward-reclining wedge. The angles of lumbar flexion and pelvic tilt were measured using a three-dimensional motion analysis system. Differences in kinematic data of the...

  11. An automated atmospheric sampling system operating on 747 airliners

    Science.gov (United States)

    Perkins, P.; Gustafsson, U. R. C.

    1975-01-01

    An air sampling system that automatically measures the temporal and spatial distribution of selected particulate and gaseous constituents of the atmosphere has been installed on a number of commercial airliners and is collecting data on commercial air routes covering the world. Measurements of constituents related to aircraft engine emissions and other pollutants are made in the upper troposphere and lower stratosphere (6 to 12 km) in support of the Global Air Sampling Program (GASP). Aircraft operated by different airlines sample air at latitudes from the Arctic to Australia. This system includes specialized instrumentation for measuring carbon monoxide, ozone, water vapor, and particulates, a special air inlet probe for sampling outside air, a computerized automatic control, and a data acquisition system. Air constituents and related flight data are tape recorded in flight for later computer processing on the ground.

  12. In-depth survey report of American Airlines plating facility

    Science.gov (United States)

    Mortimer, V. D., Jr.

    1982-12-01

    An in depth survey was conducted at the American Airlines Maintenance and Engineering Center as part of National Institute for Occupational Safety and Health (NIOSH) study evaluating measures to control occupational health hazards associated with the metal plating industry. This American Airlines plating facility, employing approximately 25 workers, is primarily engaged in plating hard chromium, nickel and cadmium on aircraft engine and landing gear parts. Six tanks were studied, including an electroless nickel tank. Area and personal samples for chromium, nickel, cadmium, and cyanide were collected. Ventilation airflow and tank dimensions were measured and data recorded on plating operations. The relationships between air contaminants emitted, local exhaust ventilation flow rate, tank size, and plating activity were evaluated.

  13. Future of Colombo Airport (CMB) as an Airline Hub

    Science.gov (United States)

    Jayalath, J. T. D.; Bandara, J. M. S. J.

    2001-01-01

    Aviation throughout the world has seen profound changes within the last two decades. Today more and more airports are looking for hub operations. However, as the success of hub operation would depend on a number of parameters such as geographic location, route network, facilities available, passengers' acceptance etc., not all airports would be able to operate as successful hubs. This paper investigates the possibility for (he Bandaranayake international airport, Colombo, Sri Lanka (CMB) to emerge as a hub airport in the South Asian region. It is found that CMB is situated in a geographically advantageous position in the region with respect to the airline route network. Comparison of travel distances between CMB and prominent O-D pairs and evaluation of airline schedules at relevant established hub airports indicates that CMB could operate as a directional hub serving the South Asian market if the number of destinations with daily flights could be increased.

  14. Measurements of cosmic-ray doses in commercial airline cabins

    International Nuclear Information System (INIS)

    Cosmic radiation doses which aircrew and air passengers receive in airplanes have been calling attention in many countries especially in the last decade. In this relation, various types of information had been reported on cosmic radiation intensity. In Japan, the cosmic radiation intensity had been measured in commercial airline cabins as well as chartered flights. While the intensity depends on altitude, geomagnetic latitude (or cutoff rigidity), and temporal variation of the solar activity, their doses are often speculated based on paper records on airflights combined with the intensity-altitude relationship. In this study, however, efforts were made to estimate more realistic integrated doses in airline cabins based on actual on-board measurements which had been conducted several dozens of times in each year (e.g., 45 times in 1994 and 27 times in 1995). (author)

  15. Spreadsheet Simulation of Airline Reservation Policy Using Multimedia Software

    Directory of Open Access Journals (Sweden)

    Joel Lee Oberstone

    2010-02-01

    Full Text Available A hypothetical business simulation case study using a stand-alone spreadsheet is used to illuminate the rationale of airline overbooking. Because almost everyone has personally encountered the implications of being “bumped,” the selection of this particular case subject is motivated by the belief that half of the problem (or more of teaching a so-phisticated analytical method is in getting the stu-dent's attention. Airline overbooking, it seems, pre-sents such a case. In order for a student to “drill down” the spreadsheet skills, several multimedia tools, Wimba and Jing, are used to produce web hosted, mp4 video files of a library of short films illustrating each step of the spreadsheet operation.

  16. Industry-specific effect of CSR initiatives: hotels and airlines

    OpenAIRE

    Casado-Díaz, Ana B.; Nicolau, Juan Luis; Ruiz Moreno, Manuel Felipe; Sellers Rubio, Ricardo

    2014-01-01

    Purpose – This study aims to examine the relationships between a firm's corporate social responsibility (CSR) activities and its performance and risk. The authors hypothesize that industry-level effects are highly determinant of the sign and magnitude of these relationships to establish a ranking of industries to identify the position of the most prominent tourism-related industries: hotels and airlines. Based on the cybernetic model of decision making and the heuristics thereof, shareholders...

  17. Mergers and Product Quality: Evidence from the Airline Industry

    OpenAIRE

    Chen, Yongmin; Gayle, Philip

    2013-01-01

    Retrospective studies of horizontal mergers have focused on their price effects, leaving the important question of how mergers affect product quality largely unanswered. This paper empirically investigates this issue for two recent airline mergers: Delta/Northwest and Continental/United. Consistent with the theoretical premise that mergers improve coordination but diminish competitive pressure for quality provision, we find: (i) each merger is associated with a quality increase in markets whe...

  18. Reducing influenza spreading over the airline network

    OpenAIRE

    Marcelino, Jose; Kaiser, Marcus

    2009-01-01

    Disease spreading through human travel networks has been a topic of great interest in recent years, such as with swine influenza or SARS pandemics. Most studies have proposed removing highly connected nodes (hubs) to control spreading. Here, we test alternative strategies using edge removal (flight cancellation) for spreading over the airline network. Flight cancellation was more efficient than shutting down whole airports: spreading took 81% longer if solely selected flights were removed, compar...

  19. Perception Mapping of Travelers: Case of Six Indian Domestic Airlines

    OpenAIRE

    Shobhit Agarwal; Dey, A. K.

    2010-01-01

    Problem statement: A comparison of customer satisfaction based on service quality as perceived by air travelers was done among six domestic airlines. Literature review suggested that flying experience has three stages: Pre-flight, in-flight and post-flight and a set of six variables can be used to measure satisfaction. These variables are: Ease of bookings through the website/call center; Hassle free check in/efficient ticketing staff/regular announcements during flight delays at airport; on ...

  20. Upset Dynamics of an Airliner Model: A Nonlinear Bifurcation Analysis

    OpenAIRE

    Gill, Stephen J; Lowenberg, Mark H.; Neild, Simon A.; Krauskopf, Bernd; Puyou, Guilhem; Coetzee, Etienne

    2013-01-01

    Despite the significant improvement in safety linked to the fourth generation of airliners, the risk of encountering upset conditions remains an important consideration. Upset, which may arise from faults, external events, or inappropriate pilot inputs, can induce a loss-of-control incident if the pilot does not respond in the correct manner. Any initiative aimed at preventing such events requires an understanding of the fundamental aircraft behavior. This paper presents the use of bifurcatio...

  1. Strategic Management of a Family-Owned Airline

    DEFF Research Database (Denmark)

    Boyd, Britta; Hollensen, Svend

    2011-01-01

    resources and capabilities leading to competitive advantages within the aviation industry. From a competence and ACAP perspective family and non-family airlines are analysed by interviewing the owners, managers and selected employees of the businesses. The analysis shows how Cimber Sterling Group A/S as a...... Danish family business copes with increasing competition and critical situations, such as the volcanic ash cloud and financial crisis....

  2. Malaysia Airlines - Will the phoenix rise once more?

    OpenAIRE

    Mohd Zin, Syarizan Adzlinda

    2009-01-01

    This dissertation seeks to digest the corporate culture theories and gauge if Malaysia Airline System’s (MAS) survival strategy after the 2005 turbulent will emancipate the company from current and future crisis. This research emphasizes on the correlation of the organisational performance culture-based strategy theories and the pursuit of competitive edge, which in this research assumption, is admissible to MAS. Hence, the most suitable approach seems to be a single case study me...

  3. Determinants of Market Structure and the Airline Industry

    Science.gov (United States)

    Raduchel, W.

    1972-01-01

    The general economic determinants of market structure are outlined with special reference to the airline industry. Included are the following facets: absolute size of firms; distributions of firms by size; concentration; entry barriers; product and service differentiation; diversification; degrees of competition; vertical integration; market boundaries; and economies of scale. Also examined are the static and dynamic properties of market structure in terms of mergers, government policies, and economic growth conditions.

  4. Carriers’ Price Dispersion in the U.S. Airline Industry

    OpenAIRE

    Chi, Junwook; Koo, Won W.; Lim, Siew Hoon

    2009-01-01

    This paper explores price dispersion in the U.S. airline industry by highlighting individual carriers’ price discrimination strategies. Using heteroskedasticity-adjusted instrumental variable technique, we found that individual carriers play crucial roles in determining price dispersion, implying that the carriers’ price discrimination strategies may influence variation in airfares. Based on the estimated price dispersion and the estimated average price, we distinguished sources of price disp...

  5. Model for the growth of the World Airline Network

    CERN Document Server

    Verma, T; Nagler, J; Andrade, J S; Herrmann, H J

    2016-01-01

    We propose a probabilistic growth model for transport networks which employs a balance between popularity of nodes and the physical distance between nodes. By comparing the degree of each node in the model network and the WAN, we observe that the difference between the two is minimized for $\\alpha\\approx 2$. Interestingly, this is the value obtained for the node-node correlation function in the WAN. This suggests that our model explains quite well the growth of airline networks.

  6. Market structure and multiple equilibria in airline markets

    OpenAIRE

    Ciliberto, Federico; Tamer, Elie

    2009-01-01

    We provide a practical method to estimate the payoff functions of players in complete information, static, discrete games. With respect to the empirical literature on entry games originated by Bresnahan and Reiss (1990) and Berry (1992), the main novelty of our framework is to allow for general forms of heterogeneity across players without making equilibrium selection assumptions. We allow the effects that the entry of each individual airline has on the profits of its competitors, its “com...

  7. Advocating System Safety Concept in Preventing Airline Accidents

    OpenAIRE

    Lu, Chien-tsung; Wetmore, Michael; Smith, John

    2005-01-01

    System safety was conceptualized by the aerospace industry in the late 1940s in the United States (U.S.). Traditionally, users of system safety applied analysis to identify operational hazards and subsequently provide countermeasures before or after an accident. Unfortunately, very few aviation safety researches from the airlines had utilized it to promote aviation safety. To enrich this knowledge and contribute interest from academia, this paper adopted the inductive techniques of system saf...

  8. United Airlines Launches New Daily Nonstop Shanghai-Chicago Service

    Institute of Scientific and Technical Information of China (English)

    2004-01-01

    @@ United Airlines, the leading carrier between the U.S. And China, announced on November 1 the launch of its new Shanghai to Chicago nonstop flight. The flight took off from Shanghai's Pudong International Airport at 7:10pm, opening a new air service route between two of the world's greatest cities, which delivers greater convenience and travel options to and from China throughout the U.S. East Coast and Midwest.

  9. PESTE Analysis of the Romanian National Passenger Airline

    Directory of Open Access Journals (Sweden)

    Pauna Dan

    2011-08-01

    Full Text Available A PESTE analysis is a view over the external environment of a company, business or an economical sector, and it plays an important part in the resource management and in a future decision making process. PESTE analysis places emphasis on the impact of each factor. At international level, different structures, from the governmental ones to well-known companies and not only, choose to analyze the important factors that disturb the good functioning of these entities. In the sector of passengers and freight air transport, the majority of airline operators have chosen to investigate the external environment in which they operate by using analytical methods. For instance, we can mention SWOT and PESTE analysis of the leading low-cost Air Asia, Malaysia's second carrier, that wishes to enter the Australian aviation market, PESTE analysis of Air Arabia - a new company in the Gulf that intends to corner the market of well-known companies such as Emirates Airlines, Gulf Air and Air China. Air Arabia, in order to implement TMQ (Total Management Qualities, has used a PESTE study. In this respect, the approach to monitor the external environment of Tarom national airline is essential in the world economic crisis and globalization activities in the passengers transport, under the conditions of deregulation of the airspace.

  10. Strategy-Based Forecasting Model for Civil Airlines

    Institute of Scientific and Technical Information of China (English)

    梁剑; 左洪福

    2004-01-01

    Airlines usually pay more attention to maintenance cost for efficiency improvement and consumption reduction. However, airlines, especially the domestic airlines, can hardly predict the cost exactly due to the uncertainty and complexity until now. In practice, the cost is calculated by collecting and calculating the invoices afterwards. To settle the problem, a maintenance cost forecasting model is proposed in this paper. Maintenance activities are classified into scheduled maintenance and unscheduled maintenance. Scheduled maintenance is periodic, in which the required materials and man-power hours can be obtained properly in advance. Nevertheless, it is impossible to acquire the necessary information of unscheduled maintenance. According to the specific characteristics of each, Activity-Based Costing (ABC) and Cost Estimating Relationships (CERs) are introduced to attack the building of forecasting models, respectively. Then practical cases, the 3C check of MD-90 and the engine shop visit are adopted to verify the cost forecasting models proposed. The results show that the models not only can predict the actual maintenance cost successfully, but also are helpful to drawing up the maintenance program and managing the maintenance funds efficiently.

  11. Thermal performance of aircraft polyurethane seat cushions

    Science.gov (United States)

    Kourtides, D. A.; Parker, J. A.

    1982-01-01

    Measurements were conducted on 7.6 x 7.6 cm samples of polyurethane seat cushion material in a modified National Bureau of Standards smoke density chamber to simulate real life conditions for an onboard aircraft fire or post-crash fire. In this study, a non-flaming heat radiation condition was simulated. Two aluminized polymeric fabrics (Norfab 11HT-26-A and Preox 1100-4) and one neoprene type material in two thicknesses (Vonar 2 and 3) were tested as heat blocking layers to protect the urethane foam from rapid heat degradation. Thermogravimetric analysis and differential scanning calorimetry were performed to characterize thermally the materials tested. It was found that Vonar 2 or 3 provided approximately equal thermal protection to F.R. urethane as the aluminized fabrics, but at a significant weight penalty. The efficiency of the foams to absorb heat per unit mass loss when protected with the heat blocking layer decreases in the heating range of 2.5-5.0 W/sq cm, but remains unchanged or slightly increases in the range of 5.0-7.5 W/sq cm. The results show that at all heat flux ranges tested the usage of a heat blocking layer in aircraft seats significantly improves their thermal performance.

  12. Evaluation of the Ukraine international airlines (UIA competitiveness on the air carriage market

    Directory of Open Access Journals (Sweden)

    Tamara Oleshko

    2015-05-01

    Full Text Available The issue of Ukrainian air transport system adaptation to the business practices of European and world market has been urgent for the last twenty years. One of the main obstacles in this process is domestic airlines and airports low competitiveness. Key factors in achieving the competitive advantages by the air carriers are not only service cost but service quality, business processes and management system organization as well. Nowadays, most airlines management teams are conscious of the quality factor importance in the competition on both domestic and international markets. The airlines competitiveness on the air transport market has been evaluated in the article. The airlines competitive recovery strategies have been determined according to the specific development of the air carrier “MAU” on the air transport operations market. The ways of further development of domestic airlines and the airline competitiveness management strategy have been proposed.

  13. How Do Airlines Perceive That Strategic Alliances Affect Their Individual Branding?

    Science.gov (United States)

    Kalligiannis, Konstantinos; Iatrou, Kostas; Mason, Keith

    2006-01-01

    Much research has been carried out to evaluate the impact of strategic alliance membership on the performance of airlines. However it would be of interest to identify how airlines perceive this impact in terms of branding by each of the three global alliance groupings. It is the purpose of this paper to gather the opinion of airlines, belonging to the three strategic alliance groups, on the impact that the strategic alliance brands have had on their individual brands and how do they perceive that this impact will change in the future. To achieve this, a comprehensive survey of the alliance management and marketing departments of airlines participating in the three global strategic alliances was required. The results from this survey give an indication whether the strategic airline alliances, which are often referred to as marketing agreements, enhance, damage or have no impact on the individual airline brands.

  14. Strategic Classification and Examination of the Development of Current Airline Alliance Activities

    Science.gov (United States)

    Wang, Zhi H.; Evans, Michael

    2002-01-01

    Previous research argues that despite the fact that strategic alliances have become an important feature of the world airline industry, little rigorous analysis has been done on the effects of these alliances. This is partially because there is a lack of precise definitions to specify different types of airline alliances in the literature. This research identifies several categories of airline alliances through a strategic classification of the current alliance activities involving the major airlines for the period 1989 to 1999. The classification enables this research to examine how strategic alliance activities are evolving, particularly to compare how airlines in North America, the European Union and the Asia Pacific region have committed to different alliances. Findings show that there is a significant difference between the number and scope of alliances adopted in the three aviation markets. These findings facilitate research to further analyse the impact of market liberalization on various formations of strategic airline alliances.

  15. The Relationship Between Innovation and Company Performance in the Asian Airline Industry : An Empirical Research

    OpenAIRE

    Sim, Nicholas Lorenzo

    2015-01-01

    The airline industry in Asia has been under tremendous competitive pressure especially with the entrance of low cost airline companies into the Asian market. This has caused premier airline companies to innovate and differentiate their services to sustain its competitive edge in the market. It is believed that innovation practices would improve the overall performance of a company. The aim of this research is to determine the relationship between innovation and company performance in the Asia...

  16. Low Cost Airlines in a Developing Economy: The Case of India

    OpenAIRE

    Pasari, Nitika

    2006-01-01

    This dissertation is a study on the low cost airlines in a developing country, particularly the case of India, since the writer of this dissertation is an Indian. It begins with introducing the emergence of low cost airlines all around the world, which began with the US and was followed by Europe, before coming to Asia. It talks about the factors that initiated the emergence of low cost airlines, particularly, the deregulation of the air transport industry and the technological changes along ...

  17. Oil Shocks and Stock Prices of Airlines - An East Asia Perspective

    OpenAIRE

    Lee, Pau Boon

    2005-01-01

    The aim of this dissertation is to study and analyse the impact of oil price shock on the share prices of airline companies in East Asia, in particular international air carriers from Japan, Hong Kong, South Korea, Singapore and Malaysia by looking at how the companies‘ share prices respond to the news of oil shocks. The companies involved in this study were Japan Airlines ("JAL"), All Nippon Airways ("ANA"), Cathay Pacific Airways ("Cathay"), Korean Air ("KAL"), Malaysian Airlines ("MAS") an...

  18. Performance evaluation based on financial ratios. Case: Finnair and Scandinavian Airlines

    OpenAIRE

    Dao, Phuong

    2016-01-01

    This research aims to analyze air travel performance of Finnair and Scandinavian Airlines (SAS) based on financial ratios since aviation industry is developing worldwide and attracting a lot of attention and competition. Fundamentally, the airline industry has a strong relationship with other kinds of business and economic factors; therefore, small changes in these businesses might lead to a dramatic effect on the airline companies. This research aims to understand each airline’s business beh...

  19. @doesyourairlinetweet? An empirical examination of the use of twitter by 50 international airlines

    OpenAIRE

    Lucy Budd

    2012-01-01

    Purpose: To provide empirical evidence of the extent to which 50 of the world’s largest passenger airlines use the social media site twitter.Design/methodology/approach: Original empirical data on the presence and usage of 50 airlines’ official twitter accounts was accessed.Research limitations/implications: Research demonstrates the extent to which airlines are using twitter as a communications tool and suggests that some airline are not currently utilising twitter to its full extent.Practic...

  20. Airline price discrimination: a practice of yield management or customer profiling?

    OpenAIRE

    Constantinides, Efthymios; Diercks, Rasha H.J.

    2014-01-01

    Airline ticket prices frequently change, which is usually caused by yield management as price discrimination practice. Recently, buyers of online airline tickets tend to complain about price discrimination based on customer profiling, e.g. by means of cookie data. As cookie data and other directly or indirectly obtained customer information is easily available via the Internet, airlines may use this information to offer personalized ticket prices. In a month-long experiment, in which prices o...

  1. 'FLYING UNDER RADAR': SOUTHWEST AIRLINES AND INCUMBENTS¡¯ RESPONSE TO ENTRY

    OpenAIRE

    Jun-Byoung Oh

    2006-01-01

    This paper investigates the competitive effect of Southwest Airlines, considering the factors affecting its decision to offer service in particular city-pairs and the effect of Southwest¡¯s presence on overall fares and the fare distribution of major airlines. Southwest is a formidable, apparently low-cost competitor when it is present it often garners a large share and creates significant fare pressure on major airlines. Despite this competitive success Southwest¡¯s network does not include ...

  2. Explicit and implicit customer satisfaction factors in the leisure airline business

    OpenAIRE

    Wittmer, Andreas; Bott, Gian Andrea

    2015-01-01

    One of the main challenges for airlines is to retain loyal customers in a very competitive environment. Loyal customers offer a greater share of wallet, require less marketing effort, spread positive word of mouth and are often less price sensitive. Consequently, the objective of this paper is to understand what the key leisure airline loyalty factors are and how the leisure airline could design their product to retain as many loyal leisure passengers as possible. Hence, we develop a framewor...

  3. Building customer relationships as retention strategy in the South African domestic passenger airline industry

    Directory of Open Access Journals (Sweden)

    Pierre Mostert

    2010-12-01

    Full Text Available Organisations are increasingly focusing on building long-term relationships with customers, thereby increasing their probability for success by offering customers higher levels of satisfaction, increasing customer loyalty, and ultimately retaining customers. Airlines in particular can benefit from retaining customers as the airline industry is characterised by fierce competition and many airlines are finding it difficult to survive against the backdrop of enormous challenges in the past decade, including the significant decline in demand for air travel together with rising costs and the worldwide economic downturn. This study investigates the effect which a strategy by airlines of building relationships with customers has on customer satisfaction, loyalty, and ultimately customer retention. The effect of service failures on customers' relationships with airlines are also considered as a negative experience could results in customers defecting to competitors. A questionnaire, comprising six sections, was specifically compiled to determine customer retention in the South African domestic passenger airline industry. Data were collected by trained fieldworkers from OR Tambo International Airport by means of a non-probability convenience sampling method from 324 passengers flying with the various domestic airlines. Findings indicate that most respondents were satisfied with the airlines' overall service; respondents who formed relationships with domestic airlines were more loyal toward the airlines; and the relationships of respondents who were satisfied with airlines' service recovery efforts were either strengthened or unchanged. The findings from this study support findings from international studies by providing a unique South African perspective on the effect of a strategy of building relationships with customers on their satisfaction, loyalty and ultimately retention. It can therefore be recommended that the organisations competing in the South

  4. Building customer relationships as retention strategy in the South African Domestic Passenger Airline Industry

    OpenAIRE

    Pierre Mostert; Christine De Meyer

    2010-01-01

    Organisations are increasingly focusing on building long-term relationships with customers, thereby increasing their probability for success by offering customers higher levels of satisfaction, increasing customer loyalty, and ultimately retaining customers. Airlines in particular can benefit from retaining customers as the airline industry is characterised by fierce competition and many airlines are finding it difficult to survive against the backdrop of enormous challenges in the past...

  5. Analyzing Total Demand for Specified Destinations : A Total Demand Analysis for an Airline Company

    OpenAIRE

    Kecoglu, Onur; Sua, Melih

    2012-01-01

    The airline industry is a highly competitive market. Particularly after the major liberalization in the industry, the competition carried a step forward for all the concerned companies. Airline industry is a very dynamic market also; the expenses of a single operation may change substantially in a very short time period, which could be due to the fickle regulations or the fluctuation of oil prices. At any time, for a certain destination, a new airline company can start its operations and beco...

  6. THE IMPORTANCE OF ORGANIZATIONAL CULTURE FOR THE SUCCESS OF USA LOW-COST AIRLINES

    OpenAIRE

    Diaconu, Laura; Andrei MAXIM

    2015-01-01

    The aim of the present paper is to investigate the role played by the organizational culture to the success of the USA low-cost airlines, taking as example two major operators: Southwest Airlines and JetBlue. This exploratory research was conducted using two methods. An analysis of the secondary data offered by the specialized literature was followed by primary data collection, through structured interviews with the representatives of Southwest Airlines and JetBlue. The results show that the ...

  7. Strategic Alliance versus Competition: Airlines' Choices and their Impact on Economic Welfare

    OpenAIRE

    Hideki Murakami

    2005-01-01

    This paper theoretically analyses the duopolistic behavior of two hypothetical airlines operating in a four-point hub-and-spoke route network system, and examines the impact of this behavior on economic welfare. The important character of these two airlines is that they are of different (i.e., asymmetric) cost structures and products. The main findings are that (1) in rare cases, two asymmetric airlines might form a strategic alliance, and (2) Cournot competition is much more likely to genera...

  8. Importance of the Enterprise Risk Management Practice for Airline Management: ANP-based Approach

    OpenAIRE

    Ayse Kucuk Yilmaz

    2009-01-01

    Airlines are exposed to risk which may effect operations, customers, corporate value, security and safety. Risk can also be introduced to an enterprise through air transportation industry-based and organization-based changes each of which may also bring changes in the type of risk. These present and raising risks main reason of growing importance of enterprise risk management (ERM) implementation in the airlines. ERM becomes focus point in the successful airlines across the world. This intere...

  9. Management Employment-Relations Strategies: Perspectives from Studies of European (and American) Airlines

    OpenAIRE

    Greg J. Bamber; Gittell, Jody Hoffer; Kochan, Thomas Anton; von Nordenflycht, Andrew

    2009-01-01

    We discuss deregulation (liberalisation) and some of the international institutions that influence the management of people in airlines. As a point of departure, we summarise contrasting models from successful ‘new entrant’ airlines: Ryanair and Southwest. We consider examples of various categories of airlines in different ‘ideal types’ of institutional context: liberal-market economies and coordinated-market economies. These are two varieties of advanced capitalism. The former include the U...

  10. Comparison between Low-cost and Traditional Airlines. Case study: easyJet and British Airways

    OpenAIRE

    Fedosova, Aleksandra

    2016-01-01

    This thesis work is conducted with purpose to make an analysis of the financial results of traditional and low cost airlines and compare them. The comparison is done through analysis of the representatives of traditional and low cost airlines – British Airways and easyJet. In addition, the investigation provides an overview of the airline industry as a whole. Researcher applies fundamental analysis, which includes four components: business strategy analysis, accounting analysis, financia...

  11. Strategic positioning and creating competitive advantage in a challenging industry: The case study of Singapore airlines

    OpenAIRE

    Ta, Minh Thu

    2009-01-01

    The competitive landscape of global airline industry has changed dramatically as the result of airline deregulation and globalization impacts. Arguably, the most viable change for traditional airlines is the increased price pressures due to fierce competition from low cost carriers (LCCs). The ‘no frills’ formula, which involves reduction in service and comfort levels, challenges the retaining of full service model and more generally, the model focusing on service quality. Furthermore, re...

  12. The influence of services failure and service recovery on airline passengers' relationships with domestic airlines: an exploratory study

    OpenAIRE

    Meyer, Christine; Jansen Van Rensburg, L R; Mostert, Pieter

    2009-01-01

    Service failures and the subsequent service recovery efforts of an organisation can have a profound effect on customers’ satisfaction with an organisation as well as on the quality of the relationship with the organisation, despite other efforts by the organisation to build long-term relationships with its customers. Airlines in particular are faced with several challenges affecting their survival, and one such challenge is the fact that they are particularly susceptible to service failures. ...

  13. Canadian seat belt wearing rates, promotion programs, and future directions.

    NARCIS (Netherlands)

    Grant, B.A.

    1992-01-01

    On the basis of a national driver seat belt survey conducted in Canada each year, the most important results are presented. A number of programmes for increasing seat belt use has been evaluated in Canada. Finally, a description is given of some of the current and planned activities within Canada wh

  14. 49 CFR 571.10 - Designation of seating positions.

    Science.gov (United States)

    2010-10-01

    ... No. 208 (49 CFR 571.208), firefighting vehicles, ambulances, or motor homes. To determine the number of passenger seating positions in school buses, see S4.1 of Standard No. 222 (49 CFR 571.222). (b... 49 Transportation 6 2010-10-01 2010-10-01 false Designation of seating positions. 571.10...

  15. 36 CFR 1192.27 - Priority seating signs.

    Science.gov (United States)

    2010-07-01

    ... 36 Parks, Forests, and Public Property 3 2010-07-01 2010-07-01 false Priority seating signs. 1192.27 Section 1192.27 Parks, Forests, and Public Property ARCHITECTURAL AND TRANSPORTATION BARRIERS... Buses, Vans and Systems § 1192.27 Priority seating signs. (a) Each vehicle shall contain sign(s)...

  16. Validation of the Seating and Mobility Script Concordance Test

    Science.gov (United States)

    Cohen, Laura J.; Fitzgerald, Shirley G.; Lane, Suzanne; Boninger, Michael L.; Minkel, Jean; McCue, Michael

    2009-01-01

    The purpose of this study was to develop the scoring system for the Seating and Mobility Script Concordance Test (SMSCT), obtain and appraise internal and external structure evidence, and assess the validity of the SMSCT. The SMSCT purpose is to provide a method for testing knowledge of seating and mobility prescription. A sample of 106 therapists…

  17. 36 CFR 1192.105 - Priority seating signs.

    Science.gov (United States)

    2010-07-01

    ... 36 Parks, Forests, and Public Property 3 2010-07-01 2010-07-01 false Priority seating signs. 1192.105 Section 1192.105 Parks, Forests, and Public Property ARCHITECTURAL AND TRANSPORTATION BARRIERS... Commuter Rail Cars and Systems § 1192.105 Priority seating signs. (a) Each car shall contain sign(s)...

  18. 36 CFR 1192.55 - Priority seating signs.

    Science.gov (United States)

    2010-07-01

    ... 36 Parks, Forests, and Public Property 3 2010-07-01 2010-07-01 false Priority seating signs. 1192.55 Section 1192.55 Parks, Forests, and Public Property ARCHITECTURAL AND TRANSPORTATION BARRIERS... Rapid Rail Vehicles and Systems § 1192.55 Priority seating signs. (a) Each vehicle shall contain...

  19. 49 CFR 38.55 - Priority seating signs.

    Science.gov (United States)

    2010-10-01

    ... 49 Transportation 1 2010-10-01 2010-10-01 false Priority seating signs. 38.55 Section 38.55 Transportation Office of the Secretary of Transportation AMERICANS WITH DISABILITIES ACT (ADA) ACCESSIBILITY SPECIFICATIONS FOR TRANSPORTATION VEHICLES Rapid Rail Vehicles and Systems § 38.55 Priority seating signs....

  20. 49 CFR 38.27 - Priority seating signs.

    Science.gov (United States)

    2010-10-01

    ... 49 Transportation 1 2010-10-01 2010-10-01 false Priority seating signs. 38.27 Section 38.27 Transportation Office of the Secretary of Transportation AMERICANS WITH DISABILITIES ACT (ADA) ACCESSIBILITY SPECIFICATIONS FOR TRANSPORTATION VEHICLES Buses, Vans and Systems § 38.27 Priority seating signs. (a)...

  1. 49 CFR 38.105 - Priority seating signs.

    Science.gov (United States)

    2010-10-01

    ... 49 Transportation 1 2010-10-01 2010-10-01 false Priority seating signs. 38.105 Section 38.105 Transportation Office of the Secretary of Transportation AMERICANS WITH DISABILITIES ACT (ADA) ACCESSIBILITY SPECIFICATIONS FOR TRANSPORTATION VEHICLES Commuter Rail Cars and Systems § 38.105 Priority seating signs....

  2. The Study of Airline Merger and Acquisition in the Great China Area

    Science.gov (United States)

    Shon, Zhengyi

    2003-01-01

    The Asian financial crisis in the late 20 th century has some long lasting effect on the air transportation industry in Asia, especially in the Great China Area. Starting from 1998, airlines in both China and Taiwan suffered some serious financial losses due to the diminishing travel demand caused by the economic recession. Airlines were forced to cut price to attract passengers and hence crashed the market discipline. A number of airline mergers and acquisitions were then driven by the markets and the governments. After China and Taiwan have both entered the World Trade Organization, some mega-merging cases were finalized in late 2002 for better fitting the world's aviation competitions. This paper reviews the nine merging and acquiring cases in the Great China Area in the past 5 years. Almost all the airlines in the area were involved. The new groups of airlines and the survival airlines are introduced. Market response to the airline mergers will also be examined. A general look over the performance of the new airlines will be discussed. And the future of the market will also be analyzed. Finally, the practices and the impacts of current inter-state mergers in the Great China Area will be examined. The study has expected a highly concentrated domestic market in both China and Taiwan. Each of the market will be dominated by three major airline groups of their own. Cross-holding equity within these 6 leading aviation groups would also be possible after further deregulations.

  3. Price rules in airline marketing / Elina Krauja-Veide, Marina Jõgi, Toms Andersons...[jt.

    Index Scriptorium Estoniae

    2004-01-01

    Lennukompaniide Air Baltic, Estonian Air, British Airways ja Lithuanian Airlines turundusjuhid olukorrast Baltimaade lennundusturul ja lennufirmade turundustegevusest. Kommenteerivad Priit Kivik, Ilona Kbejan, Julia Brjuhanova. Tabel

  4. The Lessons Learned From An Airline In-Flight Entertainment Graphical User Interface Project.

    OpenAIRE

    Wake, Thomas

    2008-01-01

    There is a recent history of airline acquisitions and mergers as the industry has consolidated after several turbulent events outside of its control. During February 2007 Epsilon (a UK based airline) acquired and decided to integrate with Zeta (also a UK based airline). One of the projects related to this integration was the re-branding of the Zeta In-Flight Entertainment (IFE) product. Due to a franchise agreement with Eta (a third UK based airline), the Zeta IFE systems were Eta branded ...

  5. A pilot evaluation of two G-seat cueing schemes

    Science.gov (United States)

    Showalter, T. W.

    1978-01-01

    A comparison was made of two contrasting G-seat cueing schemes. The G-seat, an aircraft simulation subsystem, creates aircraft acceleration cues via seat contour changes. Of the two cueing schemes tested, one was designed to create skin pressure cues and the other was designed to create body position cues. Each cueing scheme was tested and evaluated subjectively by five pilots regarding its ability to cue the appropriate accelerations in each of four simple maneuvers: a pullout, a pushover, an S-turn maneuver, and a thrusting maneuver. A divergence of pilot opinion occurred, revealing that the perception and acceptance of G-seat stimuli is a highly individualistic phenomena. The creation of one acceptable G-seat cueing scheme was, therefore, deemed to be quite difficult.

  6. Rethinking design parameters in the search for optimal dynamic seating.

    Science.gov (United States)

    Pynt, Jennifer

    2015-04-01

    Dynamic seating design purports to lessen damage incurred during sedentary occupations by increasing sitter movement while modifying muscle activity. Dynamic sitting is currently defined by O'Sullivan et al. ( 2013a) as relating to 'the increased motion in sitting which is facilitated by the use of specific chairs or equipment' (p. 628). Yet the evidence is conflicting that dynamic seating creates variation in the sitter's lumbar posture or muscle activity with the overall consensus being that current dynamic seating design fails to fulfill its goals. Research is needed to determine if a new generation of chairs requiring active sitter involvement fulfills the goals of dynamic seating and aids cardio/metabolic health. This paper summarises the pursuit of knowledge regarding optimal seated spinal posture and seating design. Four new forms of dynamic seating encouraging active sitting are discussed. These are 1) The Core-flex with a split seatpan to facilitate a walking action while seated 2) the Duo balans requiring body action to create rocking 3) the Back App and 4) Locus pedestal stools both using the sitter's legs to drive movement. Unsubstantiated claims made by the designers of these new forms of dynamic seating are outlined. Avenues of research are suggested to validate designer claims and investigate whether these designs fulfill the goals of dynamic seating and assist cardio/metabolic health. Should these claims be efficacious then a new definition of dynamic sitting is suggested; 'Sitting in which the action is provided by the sitter, while the dynamic mechanism of the chair accommodates that action'. PMID:25892386

  7. HHS Enterprise Data Inventory

    Data.gov (United States)

    U.S. Department of Health & Human Services — The Enterprise Data Inventory (EDI) is the comprehensive inventory listing of agency data resources including public, restricted public, and non-public datasets.

  8. National Wetlands Inventory Polygons

    Data.gov (United States)

    Minnesota Department of Natural Resources — Wetland area features mapped as part of the National Wetlands Inventory (NWI). The National Wetlands Inventory is a national program sponsored by the US Fish and...

  9. World Glacier Inventory

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — The World Glacier Inventory (WGI) contains information for over 130,000 glaciers. Inventory parameters include geographic location, area, length, orientation,...

  10. Housing Inventory Count

    Data.gov (United States)

    Department of Housing and Urban Development — This report displays the data communities reported to HUD about the nature of their dedicated homeless inventory, referred to as their Housing Inventory Count...

  11. 基于心理契约的中国民营航空人力资源现状与对策探析--以英安航空公司为例%Psychological Contract of Private Airlines in China-A Case Study in Ying’an Airlines

    Institute of Scientific and Technical Information of China (English)

    李蓉源

    2013-01-01

    The disorder of employment relation in private airlines in China has raised the attention of the researchers. By using Rousseau’s psychological contract inventory to carry out empirical research on the psychological contract state of a private airlines-Ying’an airline, this paper aims to seek out the reason that cause the breach of the contract and other behavioral changes caused by the psychological contract.%针对国内民营航空人力资源管理混乱,雇佣关系波动的现状,运用Rousseau的心理契约测量方法(Psychological contract inventory)对英安航空公司进行实证研究。通过研究结果,探析心理契约在民营航空企业中的状态以及对雇佣关系的影响,以此制定相应对策。

  12. From National Forest Inventory to National Forest GHG Inventories

    OpenAIRE

    de Jong, Ben; PANDEY Devendra; Achard, Frederic

    2010-01-01

    Chapter 3.3 presents two national case studies for forest inventories in tropical countries: the Indian and Mexican national forest inventories. These national forest inventories have been use to report GHG inventories to the UNFCC

  13. Commodities Inventory Effect

    OpenAIRE

    Carpantier, Jean-Francois; DUFAYS, Arnaud

    2013-01-01

    Does commodity price volatility increase when inventories are low? We are the first ones to document this relationship. To that aim, we estimate asym- metric volatility models for a large set of commodities over 1994-2011. Since inventories are hard to measure, especially for high frequency data, we use positive return shocks as a new original proxy for inventories and find that asymmetric GARCH models reveal a significant inventory effect for many commodities. The results look robust. They h...

  14. Statistical Performance Evaluation Of Soft Seat Pressure Relief Valves

    Energy Technology Data Exchange (ETDEWEB)

    Harris, Stephen P.; Gross, Robert E.

    2013-03-26

    Risk-based inspection methods enable estimation of the probability of failure on demand for spring-operated pressure relief valves at the United States Department of Energy's Savannah River Site in Aiken, South Carolina. This paper presents a statistical performance evaluation of soft seat spring operated pressure relief valves. These pressure relief valves are typically smaller and of lower cost than hard seat (metal to metal) pressure relief valves and can provide substantial cost savings in fluid service applications (air, gas, liquid, and steam) providing that probability of failure on demand (the probability that the pressure relief valve fails to perform its intended safety function during a potentially dangerous over pressurization) is at least as good as that for hard seat valves. The research in this paper shows that the proportion of soft seat spring operated pressure relief valves failing is the same or less than that of hard seat valves, and that for failed valves, soft seat valves typically have failure ratios of proof test pressure to set pressure less than that of hard seat valves.

  15. Deep-seated gas generation and preservation condition in China

    Institute of Scientific and Technical Information of China (English)

    LIU Wenhui; ZHANG Dianwei

    2007-01-01

    Deep-seated gas is defined in this paper as natural gas generated under the combined action of high temperature,high pressure, and environment media. As to organic matter vertical evolution, deep-seated gas is natural gas, which is generated and deposited under the position of an oil genera-tion window. Deep-seated gas exploration is an important potential field for oil-gas exploration. Also, it is an inexorable trend to the further development of oil and gas provinces.In this paper, the authors will examine and distinguish the concept of deep-seated gas, and discuss the distribution and gas source of deep-seated gas. It is pointed out that kerogen,assemble dissoluble organic matter and disperse dissoluble organic matter all have Contributed to deep-seated gas generation, especially disperse dissoluble organic matter in composite and superimposed sedimentary basin. In the end,according to the structural evolution and hydrocarbon source rock depositional distribution, the distribution of deep-seated gas in China is predicted.

  16. Seat belt use during pregnancy in Iran: attitudes and practices

    Institute of Scientific and Technical Information of China (English)

    Mojgan Karbakhsh; Zahra Ershadi; Ali Khaji; Fatemeh Rahimi-Sharbaf

    2010-01-01

    Objective: Seat belt use during pregnancy reduces injury to the mother and her fetus. During recent years, the use of seat belts has been mandated by law in Iran. The purpose of this study was to determine the attitudes and practices of pregnant women regarding seat belt use.Methods: In this cross-sectional study, we asked 335 pregnant women at a hospital-based prenatal care clinic on the use of safety belt before and during pregnancy. SPSS version 13.0 was used for data analysis.Results: The mean age of study subjects was 27.3 years±5.3 years with the median of 27 years. Compared with the seat belt use before pregnancy, no change was detected in 48.7% of the women; seat belt use had increased in 17.5 %of them and decreased in 33.8 %. Eighty-one percent of women knew the correct placing of both lap belt and shoulder belt. Only 4% of women had received education on proper restraint use during pregnancy.Conclusions: The prevalence of seat belt use during pregnancy is lower than reports which are mostly from developed nations. The fact that about one-third of women have decreased their seat belt usage during pregnancy highlights the importance of education of mothers on this topic.

  17. Application of Zen sitting principles to microscopic surgery seating.

    Science.gov (United States)

    Noro, Kageyu; Naruse, Tetsuya; Lueder, Rani; Nao-I, Nobuhisa; Kozawa, Maki

    2012-03-01

    This paper describes the application of an alternative seating concept for surgeons that reflects the research of Zen sitting postures, which require Zazen meditators to maintain fixed postures for long durations. The aim of this alternative approach is to provide sitters with a seat pan with sacral support(1) that provides a more even distribution of seat pressures, induces forward pelvic rotation and improves lumbar, buttock and thigh support. This approach was applied to the development of a chair for microscopic surgery. The experimental chair is a seat pan that closely matches the three-dimensional contours of the user's buttocks. Seat comfort was evaluated by comparing both changes in pelvic tilt and seat pressure distributions using Regionally-Differentiated Pressure Maps (RDPM) with subjective ratings of surgeons while operating in prototype and conventional chairs. Findings include that the sacral support of the prototype chair prevents backward pelvic rotation, as seen in zazen (Zen sitting postures). Preliminary data suggests that the prototype provided greater sitting comfort and support for constrained operating postures than did the conventional chair. These findings support the selective application of concave-shaped seat pans that conform to users' buttocks and reflect Zen sitting principles. PMID:21798514

  18. Research of Contact Stresses between Seat Cushion and Human Body

    Directory of Open Access Journals (Sweden)

    Pervan Stjepan

    2010-06-01

    Full Text Available Design optimization of seat cushions is associated with the need to investigate their softness using, for this purpose, various kinds of loading pads. The aim of the investigation was: to determine seat cushion stiffness of a chair selected from a set of dining-room furniture, to determine values and distributions of contact strains on the seat surface caused by loading pad of different hardness, numerical calculation of contact strains between the seat cushion and the loading pad and to verify the results of these calculations with the results of laboratory experiments. The performed tests showed that the assessment of the seat cushion stiffness and the evaluation of contact stresses on their surface should be carried out using an equally stiff loading pad. In numerical calculations, polyurethane foams should be modeled as hyperfoam bodies of σ=f(ε characteristics determined in an axial compression test. Contact stresses between the seat cushion and the user’s body should be reduced as a result of application of a frictionless connection of thin layers of polyurethane foams with foam forming the proper elastic layer of the seat.

  19. Statistical Performance Evaluation Of Soft Seat Pressure Relief Valves

    International Nuclear Information System (INIS)

    Risk-based inspection methods enable estimation of the probability of failure on demand for spring-operated pressure relief valves at the United States Department of Energy's Savannah River Site in Aiken, South Carolina. This paper presents a statistical performance evaluation of soft seat spring operated pressure relief valves. These pressure relief valves are typically smaller and of lower cost than hard seat (metal to metal) pressure relief valves and can provide substantial cost savings in fluid service applications (air, gas, liquid, and steam) providing that probability of failure on demand (the probability that the pressure relief valve fails to perform its intended safety function during a potentially dangerous over pressurization) is at least as good as that for hard seat valves. The research in this paper shows that the proportion of soft seat spring operated pressure relief valves failing is the same or less than that of hard seat valves, and that for failed valves, soft seat valves typically have failure ratios of proof test pressure to set pressure less than that of hard seat valves

  20. Rivalry in the U.S. Airline Industry

    OpenAIRE

    Barla, Philippe

    1996-01-01

    In this paper, we use Market Share Instability (MSI) as a measure of the intensity of competition among airlines on a specific route. This measure is used to capture not only price competition but also non-price competition notably capacity competition. We test the effect of different variables (used in pricing studies) on MSI on a sample of 400 routes over the period 1987 to 1993. Most of the results found in pricing studies are confirmed using this measure of rivalry. For example the presen...

  1. A Boolean Approach to Airline Business Model Innovation

    DEFF Research Database (Denmark)

    Hvass, Kristian Anders

    Research in business model innovation has identified its significance in creating a sustainable competitive advantage for a firm, yet there are few empirical studies identifying which combination of business model activities lead to success and therefore deserve innovative attention. This study...... analyzes the business models of North America low-cost carriers from 2001 to 2010 using a Boolean minimization algorithm to identify which combinations of business model activities lead to operational profitability. The research aim is threefold: complement airline literature in the realm of business model...... innovation, introduce Boolean minimization methods to the field, and propose alternative business model activities to North American carriers striving for positive operating results....

  2. An automated atmospheric sampling system operating on 747 airliners

    Science.gov (United States)

    Perkins, P. J.; Gustafsson, U. R. C.

    1976-01-01

    An air sampling system that automatically measures the temporal and spatial distribution of particulate and gaseous constituents of the atmosphere is collecting data on commercial air routes covering the world. Measurements are made in the upper troposphere and lower stratosphere (6 to 12 km) of constituents related to aircraft engine emissions and other pollutants. Aircraft operated by different airlines sample air at latitudes from the Arctic to Australia. This unique system includes specialized instrumentation, a special air inlet probe for sampling outside air, a computerized automatic control, and a data acquisition system. Air constituent and related flight data are tape recorded in flight for later computer processing on the ground.

  3. Pricing strategy and technology choices: an empirical investigation of ‘Everyday Low Price’ in the domestic US Airline sector

    OpenAIRE

    Chellappa, RK; Sin, R

    2012-01-01

    INTRODUCTION: There is a rich literature in economics on factors that govern airline prices. With approximately 50% of airline tickets sold online, there is now a renewed interest in investigating airline pricing particularly amongst Information Systems (IS) researchers. While market transparency created by online travel agents (OTAs) is a motivation enough to reexamine airline pricing, one missing piece calls for a thorough empirical investigation: In all extant studies (economics, marketing...

  4. A scenario aggregation based approach for determining a robust airline fleet composition

    NARCIS (Netherlands)

    O.L. Listes (Ovidiu); R. Dekker (Rommert)

    2002-01-01

    textabstractStrategic airline fleet planning is one of the major issues addressed through newly initiated decision support systems, designed to assist airlines and aircraft manufacturers in assessing the benefits of the emerging concept of dynamic capacity allocation. We present background rese

  5. The Airlines' View of the Value of a University Minor in Aviation

    Science.gov (United States)

    Lindsay, Ralph W., Jr.; Edeburn, Carl E.

    1975-01-01

    The results of an opinion questionnaire sent to the personnel directors of 28 domestic airlines indicate that the majority of the respondents feel that an aviation minor would be valuable to prospective airline employees. Includes comments on what subject areas the respondents feel would be important in an aviation minor. (MLH)

  6. Importance of the Enterprise Risk Management Practice for Airline Management: ANP-based Approach

    Directory of Open Access Journals (Sweden)

    Ayse Kucuk Yilmaz

    2009-02-01

    Full Text Available Airlines are exposed to risk which may effect operations, customers, corporate value, security and safety. Risk can also be introduced to an enterprise through air transportation industry-based and organization-based changes each of which may also bring changes in the type of risk. These present and raising risks main reason of growing importance of enterprise risk management (ERM implementation in the airlines. ERM becomes focus point in the successful airlines across the world. This interest should be airlines in the Turkey if they want to be in the hard airline market conditions.  This study aims at the introducing to four aspects of ERM implementation: benefits, opportunities, risks and costs that call attention to the ERM implementation in the airlines as managerial approach at the Turkey. Airline manager’s consideration will enhance and increase about importance of ERM by this study. Analytic Network Process (ANP is used as a qualitative technique for ERM implementation decision at airline management

  7. 75 FR 41920 - Agency Information Collection; Activity Under OMB Review; Airline Service Quality Performance...

    Science.gov (United States)

    2010-07-19

    ... on the following collection of information was published on April 16, 2010 (75 FR 21716). DATES...; Airline Service Quality Performance--Part 234 AGENCY: Research & Innovative Technology Administration..., Office of Airline Information, RTS-42, Room E36-303, RITA, BTS, 1200 New Jersey Avenue, SE.,...

  8. 77 FR 33808 - Agency Information Collection; Activity Under OMB Review: Airline Service Quality Performance...

    Science.gov (United States)

    2012-06-07

    ... on the following collection of information was published on March 27, 2012 (77 FR 18306). There were...: Airline Service Quality Performance--Part 234 AGENCY: Research & Innovative Technology Administration... CONTACT: Cecelia Robinson, Office of Airline Information, RTS-42, Room E34-410, RITA, BTS, 1200 New...

  9. 77 FR 18306 - Agency Information Collection; Activity Under OMB Review; Airline Service Quality Performance

    Science.gov (United States)

    2012-03-27

    ... (see 76 FR 41726). The proposed rule would require carriers to report, (1) the number of mishandled...; Airline Service Quality Performance AGENCY: Research & Innovative Technology Administration (RITA), Bureau... Robinson, Office of Airline Information, RTS-42, Room E34, RITA, BTS, 1200 New Jersey Avenue...

  10. Why do airlines want and use thrust reversers? A compilation of airline industry responses to a survey regarding the use of thrust reversers on commercial transport airplanes

    Science.gov (United States)

    Yetter, Jeffrey A.

    1995-01-01

    Although thrust reversers are used for only a fraction of the airplane operating time, their impact on nacelle design, weight, airplane cruise performance, and overall airplane operating and maintenance expenses is significant. Why then do the airlines want and use thrust reversers? In an effort to understand the airlines need for thrust reversers, a survey of the airline industry was made to determine why and under what situations thrust reversers are currently used or thought to be needed. The survey was intended to help establish the cost/benefits trades for the use of thrust reversers and airline opinion regarding alternative deceleration devices. A compilation and summary of the responses given to the survey questionnaire is presented.

  11. Inventory - Dollars and sense

    International Nuclear Information System (INIS)

    Nuclear utilities are becoming more aware of the importance of having an inventory investment that supports two opposing philosophies. The business philosophy wants a minimal inventory investment to support a better return on invested dollars. This increase in return comes from having the dollars available to invest versus having the money tied up in inventory sitting on the shelf. The opposing viewpoint is taken by maintenance/operations organizations, which desire the maximum inventory available on-site to repair any component at any time to keep the units on-line at all times. Financial managers also want to maintain cash flow throughout operations so that plants run without interruptions. Inventory management is therefore a mixture of financial logistics with an operation perspective in mind. A small amount of common sense and accurate perception also help. The challenge to the materials/inventory manager is to optimize effectiveness of the inventory by having high material availability at the lowest possible cost

  12. Understanding Randomness and Its Impact on Student Learning: Lessons Learned from Building the Biology Concept Inventory (BCI)

    Science.gov (United States)

    Garvin-Doxas, Kathy; Klymkowsky, Michael W.

    2008-01-01

    While researching student assumptions for the development of the Biology Concept Inventory (BCI; http://bioliteracy.net), we found that a wide class of student difficulties in molecular and evolutionary biology appears to be based on deep-seated, and often unaddressed, misconceptions about random processes. Data were based on more than 500…

  13. 41 CFR 301-10.123 - When may I use other than coach-class airline accommodations?

    Science.gov (United States)

    2010-07-01

    ... than coach-class airline accommodations? 301-10.123 Section 301-10.123 Public Contracts and Property... 10-TRANSPORTATION EXPENSES Common Carrier Transportation Airline Accommodations § 301-10.123 When may I use other than coach-class airline accommodations? Government travelers are required to...

  14. 14 CFR 61.63 - Additional aircraft ratings (other than for ratings at the airline transport pilot certification...

    Science.gov (United States)

    2010-01-01

    ... ratings at the airline transport pilot certification level). 61.63 Section 61.63 Aeronautics and Space... aircraft ratings (other than for ratings at the airline transport pilot certification level). (a) General. For an additional aircraft rating on a pilot certificate, other than for an airline transport...

  15. Business-IT Alignment Maturity: The Correlation of Performance Indicators and Alignment Maturity within the Commercial Airline Industry

    Science.gov (United States)

    Ryan, Timothy K.

    2010-01-01

    During the period from 1978 to 2009, more than 200 commercial airlines were forced to merge, cease operations, or file for bankruptcy protection. The purpose of this quantitative study is to evaluate the global commercial airline industry from an IT-business alignment perspective and correlate the alignment maturity level of each airline with…

  16. 14 CFR Appendix J to Part 141 - Aircraft Type Rating Course, For Other Than an Airline Transport Pilot Certificate

    Science.gov (United States)

    2010-01-01

    ... an Airline Transport Pilot Certificate J Appendix J to Part 141 Aeronautics and Space FEDERAL... Airline Transport Pilot Certificate 1. Applicability. This appendix prescribes the minimum curriculum for an aircraft type rating course other than an airline transport pilot certificate, for: (a) A...

  17. 78 FR 5167 - BE-9: Quarterly Survey of Foreign Airline Operators' Revenues and Expenses in the United States

    Science.gov (United States)

    2013-01-24

    ... Bureau of Economic Analysis XRIN 0691-XC003 BE-9: Quarterly Survey of Foreign Airline Operators' Revenues... Foreign Airline Operators' Revenues and Expenses in the United States (BE-9). This mandatory survey is..., agents, or other representatives of foreign airline operators that transport passengers or freight...

  18. Manpower Projections, Recruitment Needs and Training Requirements for Commercial Airline Pilots in the United States 1968-1979.

    Science.gov (United States)

    Simons, Robert Marchand

    This study evaluated the reported airline pilot shortage in relation to certified air carriers; recruitment needs for qualified applicants; training requirements as recommended by air carriers, airline captains, and flight officers; and airline pilot supply and demand during 1968-79. A literature review on foreign and domestic pilot shortages was…

  19. The Effects of Microgravity on Seated Height (Spinal Elongation)

    Science.gov (United States)

    Young, K. S.; Rajulu, S.

    2011-01-01

    ABSTRACT Many physiological factors, such as spinal elongation, fluid shifts, bone atrophy, and muscle loss, occur during an exposure to a microgravity environment. Spinal elongation is just one of the factors that can also affect the safety and performance of a crewmember while in space. Spinal elongation occurs due to the lack of gravity/compression on the spinal column. This allows for the straightening of the natural spinal curve. There is a possible fluid shift in the inter-vertebral disks that may also result in changes in height. This study aims at collecting the overall change in seated height for crewmembers exposed to a microgravity environment. During previous Programs, Apollo-Soyuz Test Project (ASTP) and Skylab, spinal elongation data was collected from a small number of subjects in a standing posture but were limited in scope. Data from these studies indicated a quick increase in stature during the first few days of weightlessness, after which stature growth reached a plateau resulting in up to a 3% increase of the original measurement [1-5]. However, this data was collected only for crewmembers in standing posture and not in a seated posture. Seated height may have a different effect than standing height due to a change in posture as well as due to a compounded effect of wearing restraints and a potential compression of the gluteal area. Seated height was deemed as a critical measurement in the design of the Constellation Program s (CxP) Crew Exploration Vehicle (CEV), called Orion which is now the point-of-departure vehicle for the Multi-Purpose Crew Vehicle (MPCV) Program; therefore a better understanding of the effects of microgravity on seated height is necessary. Potential changes in seated height that may not have impacted crew accommodation in previous Programs will have significant effects on crew accommodation due to the layout of seats in the Orion.. The current and existing configuration is such that the four crewmembers are stacked two by

  20. MACRO MODEL OF SEAT BELT USE BY CAR DRIVERS AND PASSENGERS

    Directory of Open Access Journals (Sweden)

    Kazimierz JAMROZ

    2013-12-01

    Full Text Available The article presents some problems of seat belt use by car drivers and passengers. It looks in particular at seat belt use and effectiveness in selected countries. Next, factors of seat belt use are presented and methodology of model development. A macro model of seat belt use is presented based on data from around fifty countries from different continents.

  1. 14 CFR 382.87 - What other requirements pertain to seating for passengers with a disability?

    Science.gov (United States)

    2010-01-01

    ... applicable foreign government safety requirements, including those pertaining to exit seating (see 14 CFR 121... 14 Aeronautics and Space 4 2010-01-01 2010-01-01 false What other requirements pertain to seating... DISABILITY IN AIR TRAVEL Seating Accommodations § 382.87 What other requirements pertain to seating...

  2. 14 CFR 382.81 - For which passengers must carriers make seating accommodations?

    Science.gov (United States)

    2010-01-01

    ... seating accommodations? 382.81 Section 382.81 Aeronautics and Space OFFICE OF THE SECRETARY, DEPARTMENT OF... TRAVEL Seating Accommodations § 382.81 For which passengers must carriers make seating accommodations? As a carrier, you must provide the following seating accommodations to the following passengers...

  3. 76 FR 13620 - Opportunity to Partner; Testing of Patient Compartment Seating and Restraints to Proposed Test...

    Science.gov (United States)

    2011-03-14

    ... Compartment Seating and Restraints to Proposed Test Standard Authority: 29 U.S.C. 669. AGENCY: NIOSH, Centers... existing, redesigned, and/or new seating to validate the test methods proposed. It is anticipated testing... analysis. Prospective industry partners will provide the following test assets: Seating, seat...

  4. 14 CFR 121.344a - Digital flight data recorders for 10-19 seat airplanes.

    Science.gov (United States)

    2010-01-01

    ... seat airplanes. 121.344a Section 121.344a Aeronautics and Space FEDERAL AVIATION ADMINISTRATION... Equipment Requirements § 121.344a Digital flight data recorders for 10-19 seat airplanes. (a) Except as... airplane having a passenger seating configuration, excluding any required crewmember seat, of 10 to...

  5. 14 CFR 135.75 - Inspectors credentials: Admission to pilots' compartment: Forward observer's seat.

    Science.gov (United States)

    2010-01-01

    ...' compartment: Forward observer's seat. 135.75 Section 135.75 Aeronautics and Space FEDERAL AVIATION...' compartment: Forward observer's seat. (a) Whenever, in performing the duties of conducting an inspection, an.... (b) A forward observer's seat on the flight deck, or forward passenger seat with headset or...

  6. 14 CFR 125.317 - Inspector's credentials: Admission to pilots' compartment: Forward observer's seat.

    Science.gov (United States)

    2010-01-01

    ... pilots' compartment: Forward observer's seat. 125.317 Section 125.317 Aeronautics and Space FEDERAL... pilots' compartment: Forward observer's seat. (a) Whenever, in performing the duties of conducting an... of safety. (b) A forward observer's seat on the flight deck, or forward passenger seat with...

  7. Application of Near Field Communication Technology for Mobile Airline Ticketing

    Directory of Open Access Journals (Sweden)

    Wayan Suparta

    2012-01-01

    Full Text Available Problem statement: Near Field Communication (NFC technology opens up exciting new usage scenarios for mobile devices based platform. Users of NFC-enabled devices can simply point or touch their devices to other NFC-enabled elements in the environment to communicate with them (‘contactless’, making application and data usage easy and convenient. Approach: The study describes the characteristics and advantages of NFC technology offers for the development of mobile airline ticketing. This scenario describes the potential to overcome the conventional systems that are not gated and use study tickets. In such a system, today a transport application can be loaded on a NFC-enabled phone. To study such a case, Yogyakarta International Airport was taken as an example for a discussion. Results: NFC technology which consisting of three modes of operation and with international standardization can be applied as contactless to simplicity transactions, content delivery and information sharing on a mobile based platform. Conclusion: The idea of NFC application for mobile airline ticketing has been discussed for Yogyakarta International Airport."

  8. Face-Saving Devices: Seat Belts and Air Bags

    Science.gov (United States)

    ... page: https://medlineplus.gov/news/fullstory_160032.html Face-Saving Devices: Seat Belts and Air Bags Using ... 11 percent) suffered facial fractures -- nasal and mid-face fractures most often. Those most likely to suffer ...

  9. Joint overbooking and seat allocation for fare families

    DEFF Research Database (Denmark)

    Hjorth, Robert; Fiig, Thomas; Bondoux, Nicolas;

    2016-01-01

    Revenue Management Systems (RMS) traditionally solve the seat allocation problem separately from the overbooking problem. Overbooking is managed by inflating the authorization levels obtained from seat allocation by various heuristics. This approach although suboptimal, is necessitated because...... of the complexity and dimensionality of the Dynamic Program (DP), which prohibits computation for realistic size problems. We review several DP models developed for seat-allocation and overbooking over a time span of 40 years, reflecting changed business environments. In this report we link these models together...... by means of two transformations: The marginal revenue transformation of Fiig et al. [2010] and the equivalence charging scheme of Subramanian et al. [1999]. These transformations enable us to transform the joint seat allocation and overbooking problem for fare family fare structures into an equivalent...

  10. Designing for Comfort and Reliability in an Intelligent Car Seat

    Directory of Open Access Journals (Sweden)

    D. A. Wahab

    2008-01-01

    Full Text Available Today, intelligent safety systems are installed in modern cars in view of minimising road hazards. An intelligent air bag system for example, comprised several subsystems that are integrated to include the weight sensor system, image sensor system, crash sensor system and tyre pressure monitoring system. These systems when poorly positioned into the car seat, will certainly affect comfort and reliability of the car seat. This research presents the design work on an intelligent car seat, which is equipped with a load cell type-sensory system. The load cells are used to detect the weight of a passenger for the deployment of an air bag system. The proposed design is validated against displacement and stress analysis using an 80 kg load to simulate the weight of a passenger. Results from the design validation indicated that the proposed configuration and material is appropriate for use in the intelligent car seat application.

  11. Analysis of seated and standing triple Wingate tests.

    Science.gov (United States)

    Wilson, Robert W; Snyder, Ann C; Dorman, Jason C

    2009-05-01

    Observations of athletes in seated and standing cycling positions in laboratory and field settings have led to the perception that they produce different outputs. The purpose of this study was to determine whether there are differences in power output and physiological responses between seated and standing positions of athletes during 3 consecutive Wingate tests. Seven (n = 7) elite-level speedskaters completed 3 x 30-second Wingate tests (resistance = 7.5% body weight) with 3.5 minutes of recovery between each test in both seated and standing positions. During the recovery period, athletes pedaled against no resistance in the seated position. Testing was randomized and separated by at least 48 hours. Power output, heart rate, blood lactate, and muscle oxygenation data were collected. Statistical analysis of comparable tests (i.e., seated Wingate test 1 [WinD1] compared with standing Wingate test 1 [WinU1]; WinD2:WinU2; WinD3:WinU3) revealed no significant differences between the seated and standing variables. Position during a short-duration maximal-effort exercise test on a stationary bike did not produce statistically different results in power, maximal heart rate, blood lactate, or muscle oxygenation. As no differences were detected between positions, practitioners can allow subjects to choose their position. Also, if a subject rises out of the seat during a "seated" test, this change may not affect the subject's physiological variables. However, transitioning from one position to the other during the test is not advised due to the possible chance of injury. It should be acknowledged that there may be reasons for stipulating one position over another (e.g., injuries, leg length). PMID:19387391

  12. High-Pressure Valve With Controlled Seating Force

    Science.gov (United States)

    Bradley, R. H.

    1987-01-01

    Poppet and seat less likely to be damaged by faulty operation. Improvements in widely-used high-pressure valve increase accuracy of preloading of poppet. Redesigned valve prevents metal shavings and other debris from developing during operation, installation, or removal. New features include secondary seal in cap. Belleville washers create precise value of seating force. If installer attempts to exceed force, torque limiter gives tactile and aural warning and makes further force increases difficult.

  13. The benefit of seat belt legislation in the United Kingdom.

    OpenAIRE

    M. McCarthy

    1989-01-01

    Legislation for compulsory wearing of seat belts by car drivers and front seat passengers has been acclaimed as a major public health advance. Reports from other countries, and two recent evaluative studies in the United Kingdom, have suggested that legislation reduces both deaths and injuries. To assess the effect of the UK law 5 years after its implementation, trends in routine data for 1976-1987 have been reviewed. There were two sources of data: mortality statistics, published by the Offi...

  14. Pseudo-dynamic method for structural analysis of automobile seats

    OpenAIRE

    J. O. Carneiro; Melo, F. J. Q. de; Pereira, J. T.; Teixeira, V.

    2005-01-01

    This work describes the application of a pseudo-dynamic (PsD) method to the dynamic analysis of passenger seats for the automotive industry. The project of such components involves a structural test considering the action of dynamic forces arising from a crash scenario. The laboratory certification of these automotive components consists essentially on the inspection of the propagation and extension of plastic deformations zones in metallic members of the seat structure as cons...

  15. Autist mobile seat's frame strength simulation used in a car

    Science.gov (United States)

    Suryo, S. H.; Jamari, J.; Naufal, G. K.; Ismail, R.; Bayuseno, A. P.; Desiningrum, D. R.

    2016-04-01

    Going on a car with autistic children needs a special handling. Autistic children that tend to be hyperactive in the car may disturb driving. A tool is needed to keep them in a calm state when they are in the car. Autist Mobile Seat is an aid for the autistic children when going on a car. The aid is an additional seat paired with the main seat of the car. This aid consists of three main things: Main frame, body skin, and pneumatic system. Frame as the main component supporting the Autist Mobile Seat functions as a holder as well as a body skin retainer in order to be able to retain the body of the autistic children. The strength of the frame from this Autist Mobile Seat should be counted as an anticipation from the failure of the frame function when receiving load when used by the autistic children in the car. Consequently, a test on the frame of the Autist Mobile Seat towards the load received should be conducted by using a method of FEM (Finite Element Method) with the help of commercial software. The simulation produces the maximum strength, the frame towards the load received as well as the critical point on the frame when loading occurs.

  16. Multitemporal landslides inventory map updating using spaceborne SAR analysis

    OpenAIRE

    Del Ventisette C.; Righini G.; Moretti S.; Casagli N.

    2014-01-01

    Deep seated gravitational slope deformation and slow moving landslides on large areas were analyzed by spaceborne SAR interferometry: a test site in the Italian Alps of about 300 km2 was selected for updating pre-existing landslide inventory maps based on the advanced interferometric processing technique (A-DInSAR). SAR images from ERS-1/2 satellites (1995–2000) and from Envisat satellite (2002–2009) have been used, allowing the deferred-time analysis of past movements and the record of r...

  17. Measurement and modelling of x-direction apparent mass of the seated human body-cushioned seat system.

    Science.gov (United States)

    Stein, George Juraj; Múcka, Peter; Chmúrny, Rudolf; Hinz, Barbara; Blüthner, Ralph

    2007-01-01

    For modelling purposes and for evaluation of driver's seat performance in the vertical direction various mechano-mathematical models of the seated human body have been developed and standardized by the ISO. No such models exist hitherto for human body sitting in an upright position in a cushioned seat upper part, used in industrial environment, where the fore-and-aft vibrations play an important role. The interaction with the steering wheel has to be taken into consideration, as well as, the position of the human body upper torso with respect to the cushioned seat back as observed in real driving conditions. This complex problem has to be simplified first to arrive at manageable simpler models, which still reflect the main problem features. In a laboratory study accelerations and forces in x-direction were measured at the seat base during whole-body vibration in the fore-and-aft direction (random signal in the frequency range between 0.3 and 30 Hz, vibration magnitudes 0.28, 0.96, and 2.03 ms(-2) unweighted rms). Thirteen male subjects with body masses between 62.2 and 103.6 kg were chosen for the tests. They sat on a cushioned driver seat with hands on a support and backrest contact in the lumbar region only. Based on these laboratory measurements a linear model of the system-seated human body and cushioned seat in the fore-and-aft direction has been developed. The model accounts for the reaction from the steering wheel. Model parameters have been identified for each subject-measured apparent mass values (modulus and phase). The developed model structure and the averaged parameters can be used for further bio-dynamical research in this field. PMID:16962599

  18. Components of Manufacturing Inventories

    OpenAIRE

    Auerbach, Alan J.; Jerry R. Green

    1980-01-01

    This paper presents a structural model of production and inventory accumulation based on the hypothesis of cost minimization. It differs from previous attempts in several respects. First, it integrates the analysis of input inventories with output inventories, treating the two stocks separately. Second, it distinguishes between temporary and permanent fluctuations in sales as they are anticipated by the industry. Third, it allows for a more general structure of adjustment costs, and in partic...

  19. 21st Inventory

    OpenAIRE

    Garner, Elliot; Dean, Brandon; Mason, Brannon

    2015-01-01

    Currently, Network Infrastructure & Services (NI&S) takes inventory of equipment assigned to employees (computers, laptops, tablets, tools) and sends reports of higher value items to the Controller’s Office. All items have a VT tag number and a CNS number, which can currently only be matched up via an Oracle Forms interface. An inventory clerk must personally verify the existence and location of each piece of equipment. An improvement would be an app that scans an inventory number or bar code...

  20. Modelling manufacturing inventories

    OpenAIRE

    John D. Tsoukalas

    2005-01-01

    This paper presents and applies a stage-of-fabrication inventory model to the UK manufacturing sector. The model emphasises the interaction between input (raw materials and work-in-process) and output (finished goods) inventories. This interaction is an important empirical regularity and proves critical for the ability of the model to fit the data. Decisions about input and output inventory investment cannot be considered in isolation from each other, but must be analysed jointly. Overall, th...

  1. Inventories and sales uncertainty

    OpenAIRE

    Caglayan, M.; Maioli, S. (Silvia); Mateut, S.

    2011-01-01

    We investigate the empirical linkages between sales uncertainty and firms´ inventory investment behavior while controlling for firms´ financial strength. Using large panels of manufacturing firms from several European countries we find that higher sales uncertainty leads to larger stocks of inventories. We also identify an indirect effect of sales uncertainty on inventory accumulation through the financial strength of firms. Our results provide evidence that financial strength mitigates the a...

  2. Interaction between humans and car seats : studies of occupant seat adjustment, posture, position, and real world neck injuries in rear-end impacts

    OpenAIRE

    Jonsson, Bertil

    2008-01-01

    Background: The latest generation of rear-end whiplash protection systems, as found in the WHIPS Volvo and SAHR Saab, have reduced injury rates by almost 50% in comparison with the previous generation of seat/head restraint systems. Occupant behaviour, such as seated posture and seat adjustment settings, may affect the injury risk. Method: Five studies were conducted. Studie I was an injury outcome study based on insurance data. Studies II-IV investigated seat adjustment, occupant backset, an...

  3. Recognition of large scale deep-seated landslides in forest areas of Taiwan using high resolution topography

    Science.gov (United States)

    Lin, Ching-Weei; Tseng, Chih-Ming; Tseng, Yi-Hsing; Fei, Li-Yuan; Hsieh, Yu-Chung; Tarolli, Paolo

    2013-01-01

    Large deep-seated landslides can be reactivated during intense events, and they can evolve into destructive failures. They are generally difficult to recognize in the field, especially when they develop in densely forested areas. A detailed and constantly updated inventory map of such phenomena, and the recognition of their topographic signatures is absolutely a key tool for landslide risk mitigation. The aim of this work is to test in forested areas, the performance of the new automatic and objective methodology developed by Tarolli et al. (2012) for geomorphic features extraction (landslide crowns) from high resolution topography (LiDAR derived Digital Terrain Models - DTMs). The methodology is based on the detection of landslides through the use of thresholds obtained by the statistical analysis of variability of landform curvature. The study was conducted in a high-risk area located in the central-south Taiwan, where an accurate field survey on landsliding processes and a high-quality set of airborne laser scanner elevation data are available. The area has been chosen because some of the deep-seated landslides are located near human infrastructures and their reactivation is highly dangerous. Thanks to LiDAR's capability to detect the bare ground elevation data in forested areas, it was possible to recognize in detail landslide features also in remote regions difficult to access. The results, if compared with the previous work of Tarolli et al. (2012), mainly focused on shallow landslides, and in a not forested area, indicate that for deep-seated landslides, where the crowns are more evident, and they are present at large scale, the tested methodology performs better (higher quality index). The method can be used to interactively assist the interpreter/user on the task of deep-seated landslide hazard mapping, and risk assessment planning of such regions.

  4. New-type air-line suits for in-situ glove box dismantling

    International Nuclear Information System (INIS)

    The dismantling of glove boxes has been performed in greenhouses by workers wearing air-line suits. But it was found that the use of air-line suits was generally accompanied by the generation of a large quantity of secondary wastes. Hence, a new type air-line suit was developed to reduce the amount of secondary wastes. The specification of the new-type air-line suit, and the method of wearing and undressing the new-type air-line suit are described in detail. The dismantling of glove boxes by wearing the new-type suit has been carried out seven times in the course of dismantling plutonium-contaminated glove boxes. The time required for wearing and undressing the new-type suit seems slightly longer than that in the case of conventional type. However, it was proved that the amount of secondary wastes was able to be reduced by using the new-type air-line suit to one fourth of the weight of secondary wastes of conventional type air-line suits. Moreover, the new-type suit requires less greenhouses and assistant workers as compared with conventional type suits. (Yoshitake, I.)

  5. A Total Factor Productivity Based Structure for Tactical Cluster Assessment: Empirical Investigation in the Airline Industry

    Science.gov (United States)

    Vasigh, Bijan; Fleming, Kenneth

    2005-01-01

    In this paper we analyze and assess the efficiency of the United States (U.S.) airline industry through the total factor productivity (TFP) method. While airlines use various resources to produce a heterogeneous group of outputs, this article focuses on certain fundamental outputs as final products of selected airlines. The results from this analysis indicate that the national airlines (US. domestic carriers) have higher TFP as compared to the major airlines. While major airlines have drastically cut costs in the past few years, they also need to improve efficiency or risk going out of business. In this paper, we investigate the efficiency and productivity of a selection of U.S. airlines for the years 1996 through 2001. These years have been chosen as a good example of years in which the industry experienced normal growth and generally positively returns. Subsequent to 2001 the industry experienced two severe external shocks, namely, the September 11, 2001. terrorist attacks and the Iraq war. These anomalous shocks make the years after 2001 inconsistent with respect to the type of index developed in this article.

  6. National Wetlands Inventory Lines

    Data.gov (United States)

    Minnesota Department of Natural Resources — Linear wetland features (including selected streams, ditches, and narrow wetland bodies) mapped as part of the National Wetlands Inventory (NWI). The National...

  7. Value of a Platform to a Seller: Case of American Airlines and Online Travel Agencies

    OpenAIRE

    Volodymyr Bilotkach; Nicholas G. Rupp; Vivek Pai

    2013-01-01

    We approach the issue of the value of a platform to a seller in a two-sided market where both buyers and sellers multi-home. A seller that loses access to a major buyer platform can potentially incur substantial financial losses. We exploit a recent conflict between American Airlines and two leading online travel agencies (Expedia and Orbitz), which dropped American Airlines fare quotes during the first quarter of 2011. We present a simple model of airline ticket distribution. This model prov...

  8. PERFORMANCE ASSESSMENT OF MAJOR U.S. AIRLINES VIA CASH FLOW RATIOS

    OpenAIRE

    Stepanyan Armen

    2013-01-01

    The paper addresses the assessment of major U.S. airlinesâ€(tm) liquidity and solvency based on information disclosed in the statements of cash flows as part of their 10-K Form annual reports filed with the Securities and Exchange Commission. Conducting financial statement analysis for major U.S. airlines has generated deep interest in and a significant importance towards using various frequently used cash flow ratios to gauge U.S. airlinesâ€(tm) viability both in the short term and long term...

  9. Structure and external factors of chinese city airline network

    Science.gov (United States)

    Liu, Hong-Kun; Zhang, Xiao-Li; Zhou, Tao

    2010-08-01

    Abstract We investigate the structural properties of Chinese city airline network (CCAN), where nodes and edges denote cities and direct flights. The degree distribution follows a double power law and a clear hierarchical layout is observed. The population exhibits a weakly positive correlation with the number of flights, yet it does not show obvious correlation with the transportation flow. The distance is an important parameter in CCAN, that is, the number of flights decays fast with the increasing of the distance. In comparison, the tertiary industry has the most important influence on the Chinese air passenger transportation. Statistically speaking, when the tertiary industry value increases by 1%, the next period's volume will increase by 0.73%.

  10. Informing or persuading travellers: the language of airlines advertisements

    Directory of Open Access Journals (Sweden)

    María Luisa BLANCO GÓMEZ

    2012-05-01

    Full Text Available In the advertising world choosing the right kind of language can lead us to becoming a successful company or not, since the choice of different kinds of words and different structures is crucial when trying to persuade people. In this paper many variables will be taken into account, from the characteristics of advertising English to those specific from Tourism English bearing also in mind the globalized world around us and consumer perception, which is an essential element in the advertising process, analyzing discursive and linguistic features. In this study we will focus on the most frequent structures in the advertisements published in the Time Magazine about some international airline companies and will examine whether the language used can achieve a persuasive effect on the potential customer or not.

  11. Disruption Management in the Airline Industry - Concepts, Models and Methods

    DEFF Research Database (Denmark)

    Clausen, Jens; Larsen, Allan; Larsen, Jesper

    2005-01-01

    The airline industry is notably one of the success stories with respect to the use of optimization based methods and tools in planning. Both in planning of the assignment of available aircraft to flights and in crew scheduling, these methods play a major role. Plans are usually made several months...... prior to the actual day of operation. As a consequence, changes often occur in the period from the construction of the plan to the day of operation. Optimization tools play an important role also in handling these changes. However, at the day of operation, no planning tool have been able to cope...... with the complexity of the re-planning given that the time span for proposing a solution is only a few minutes. Numerous suggestions for such subsystems have been put forward, but today no general tool is able to handle aircraft, crew, and passenger concurrently in a single system. Currently, there is a gap between...

  12. Addressing the Influence of Space Weather on Airline Navigation

    Science.gov (United States)

    Sparks, Lawrence

    2012-01-01

    The advent of satellite-based augmentation systems has made it possible to navigate aircraft safely using radio signals emitted by global navigation satellite systems (GNSS) such as the Global Positioning System. As a signal propagates through the earth's ionosphere, it suffers delay that is proportional to the total electron content encountered along the raypath. Since the magnitude of this total electron content is strongly influenced by space weather, the safety and reliability of GNSS for airline navigation requires continual monitoring of the state of the ionosphere and calibration of ionospheric delay. This paper examines the impact of space weather on GNSS-based navigation and provides an overview of how the Wide Area Augmentation System protects its users from positioning error due to ionospheric disturbances

  13. Revealing the structure of the world airline network

    CERN Document Server

    Verma, Trivik; Herrmann, Hans J

    2014-01-01

    Resilience of most critical infrastructures against failure of elements that appear insignificant is usually taken for granted. The World Airline Network (WAN) is an infrastructure that reduces the geographical gap between societies, both small and large, and brings forth economic gains. With the extensive use of a publicly maintained data set that contains information about airports and alternative connections between these airports, we empirically reveal that the WAN is a redundant and resilient network for long distance air travel, but otherwise breaks down completely due to removal of short and apparently insignificant connections. These short range connections with moderate number of passengers and alternate flights are the connections that keep remote parts of the world accessible. It is surprising, insofar as there exists a highly resilient and strongly connected core consisting of a small fraction of airports (around 2.3%) together with an extremely fragile star-like periphery. Yet, in spite of their ...

  14. A new approach for disruption management in airline operations control

    CERN Document Server

    Castro, António J M; Oliveira, Eugénio

    2014-01-01

    Most of the research efforts dealing with airline scheduling have been done on off-line plan optimization.  However, nowadays, with the increasingly complex and huge traffic at airports, the real challenge is how to react to unexpected events that may cause plan-disruptions, leading to flight delays. Moreover these disruptive events usually affect at least three different dimensions of the situation: the aircraft assigned to the flight, the crew assignment and, often forgotten, the passengers’ journey and satisfaction. This book includes answers to this challenge and proposes the use of the Multi-agent System paradigm to rapidly compose a multi-faceted solution to the disruptive event taking into consideration possible preferences of those three key aspects of the problem. Negotiation protocols taking place between agents that are experts in solving the different problem dimensions, combination of different utility functions and, not less important, the inclusion of the human in the automatic decision-maki...

  15. Relationship between Brazilian airline pilot errors and time of day

    Directory of Open Access Journals (Sweden)

    M.T. de Mello

    2008-12-01

    Full Text Available Flight safety is one of the most important and frequently discussed issues in aviation. Recent accident inquiries have raised questions as to how the work of flight crews is organized and the extent to which these conditions may have been contributing factors to accidents. Fatigue is based on physiologic limitations, which are reflected in performance deficits. The purpose of the present study was to provide an analysis of the periods of the day in which pilots working for a commercial airline presented major errors. Errors made by 515 captains and 472 copilots were analyzed using data from flight operation quality assurance systems. To analyze the times of day (shifts during which incidents occurred, we divided the light-dark cycle (24:00 in four periods: morning, afternoon, night, and early morning. The differences of risk during the day were reported as the ratio of morning to afternoon, morning to night and morning to early morning error rates. For the purposes of this research, level 3 events alone were taken into account, since these were the most serious in which company operational limits were exceeded or when established procedures were not followed. According to airline flight schedules, 35% of flights take place in the morning period, 32% in the afternoon, 26% at night, and 7% in the early morning. Data showed that the risk of errors increased by almost 50% in the early morning relative to the morning period (ratio of 1:1.46. For the period of the afternoon, the ratio was 1:1.04 and for the night a ratio of 1:1.05 was found. These results showed that the period of the early morning represented a greater risk of attention problems and fatigue.

  16. A Theory of False Cognitive Expectancies in Airline Pilots

    Science.gov (United States)

    Cortes, Antonio I.

    The Theory of False Cognitive Expectancies was developed by studying high reliability flight operations. Airline pilots depend extensively on cognitive expectancies to perceive, understand, and predict actions and events. Out of 1,363 incident reports submitted by airline pilots to the National Aeronautics and Space Administration Aviation Safety Reporting System over a year's time, 110 reports were found to contain evidence of 127 false cognitive expectancies in pilots. A comprehensive taxonomy was developed with six categories of interest. The dataset of 127 false expectancies was used to initially code tentative taxon values for each category. Intermediate coding through constant comparative analysis completed the taxonomy. The taxonomy was used for the advanced coding of chronological context-dependent visualizations of expectancy factors, known as strands, which depict the major factors in the creation and propagation of each expectancy. Strands were mapped into common networks to detect highly represented expectancy processes. Theoretical integration established 11 sources of false expectancies, the most common expectancy errors, and those conspicuous factors worthy of future study. The most prevalent source of false cognitive expectancies within the dataset was determined to be unconscious individual modeling based on past events. Integrative analyses also revealed relationships between expectancies and flight deck automation, unresolved discrepancies, and levels of situation awareness. Particularly noteworthy were the findings that false expectancies can combine in three possible permutations to diminish situation awareness and examples of how false expectancies can be unwittingly transmitted from one person to another. The theory resulting from this research can enhance the error coding process used during aircraft line oriented safety audits, lays the foundation for developing expectancy management training programs, and will allow researchers to proffer

  17. Force Concept Inventory.

    Science.gov (United States)

    Hestenes, David; And Others

    1992-01-01

    Reports the rationale, design, validation, and uses of the "Force Concept Inventory," an instrument to assess the students' beliefs on force. Includes results and implications of two studies that compared the inventory with the "Mechanics Baseline." Includes a copy of the instrument. (MDH)

  18. Denmark's National Inventory Report

    DEFF Research Database (Denmark)

    Illerup, J. B.; Lyck, E.; Winther, M.;

    This report is Denmark's National Inventory Report reported to the Conference of the Parties under the United Nations Framework Convention on Climate Change (UNFCCC) due by 15 April 2001. The report contains information on Denmark's inventories for all years' from 1990 to 1999 for CO2, CH4, N2O, ......, NMVOC, SO2, HFCs, PFCs and SF6....

  19. Denmark's National Inventory Report

    DEFF Research Database (Denmark)

    Illerup, J. B.; Lyck, E.; Winther, M.

    This report is Denmark's National Inventory Report reported to the Conference of the Parties under the United Nations Framework Convention on Climate Change (UNFCCC) due by 15 April 2001. The report contains information on Denmark's inventories for all years' from 1990 to 1999 for CO2, CH4, N2O, CO...

  20. Vendor-managed inventory

    DEFF Research Database (Denmark)

    Govindan, Kannan

    2013-01-01

    Vendor-managed inventory (VMI) represents the methodology through which the upstream stage of a supply chain (vendor) takes responsibility for managing the inventories at the downstream stage (customer) based on previously agreed limits. VMI is another method by which supply chains can be managed...

  1. Optimal fuel inventory strategies

    International Nuclear Information System (INIS)

    In an effort to maintain their competitive edge, most utilities are reevaluating many of their conventional practices and policies in an effort to further minimize customer revenue requirements without sacrificing system reliability. Over the past several years, Illinois Power has been rethinking its traditional fuel inventory strategies, recognizing that coal supplies are competitive and plentiful and that carrying charges on inventory are expensive. To help the Company achieve one of its strategic corporate goals, an optimal fuel inventory study was performed for its five major coal-fired generating stations. The purpose of this paper is to briefly describe Illinois Power's system and past practices concerning coal inventories, highlight the analytical process behind the optimal fuel inventory study, and discuss some of the recent experiences affecting coal deliveries and economic dispatch

  2. Adaptive control of an active seat for occupant vibration reduction

    Science.gov (United States)

    Gan, Zengkang; Hillis, Andrew J.; Darling, Jocelyn

    2015-08-01

    The harmful effects on human performance and health caused by unwanted vibration from vehicle seats are of increasing concern. This paper presents an active seat system to reduce the vibration level transmitted to the seat pan and the occupants' body under low frequency periodic excitation. Firstly, the detail of the mechanical structure is given and the active seat dynamics without external load are characterized by vibration transmissibility and frequency responses under different excitation forces. Owing the nonlinear and time-varying behaviour of the proposed system, a Filtered-x least-mean-square (FXLMS) adaptive control algorithm with on-line Fast-block LMS (FBLMS) identification process is employed to manage the system operation for high vibration cancellation performance. The effectiveness of the active seat system is assessed through real-time experimental tests using different excitation profiles. The system identification results show that an accurate estimation of the secondary path is achieved by using the FBLMS on-line technique. Substantial reduction is found for cancelling periodic vibration containing single and multiple frequencies. Additionally, the robustness and stability of the control system are validated through transient switching frequency tests.

  3. A Comparative Facebook Content Analysis between Romanian and Western European Airline Carriers

    Directory of Open Access Journals (Sweden)

    Bogdan AVRAM

    2014-03-01

    Full Text Available This research aims to investigate the different social media strategies adopted by the airline companies from two European regions. In the attempt to land more customers on their social media runway, drive more sales from social media content, increase customer satisfaction through a high response rate or increase their brand awareness, the airlines combine creativity and high-quality ideas to better promote their products and services to customers all around the globe. The paper analyses the content (number of fans, posts, number of likes, the dynamics of comments, response rate on the Facebook pages of Tarom, Blue Air, Wizz Air, Lufthansa, Austrian Airlines, KLM International and Air Europa on a one week period (10th February – 18th February 2014 and successful practices on social media. The paper also aims to provide solutions for airlines to better connect with their passengers and effectively use the social media environment to increase sales and customer satisfaction.

  4. @doesyourairlinetweet? An empirical examination of the use of twitter by 50 international airlines

    Directory of Open Access Journals (Sweden)

    Lucy Budd

    2012-10-01

    Full Text Available Purpose: To provide empirical evidence of the extent to which 50 of the world’s largest passenger airlines use the social media site twitter.Design/methodology/approach: Original empirical data on the presence and usage of 50 airlines’ official twitter accounts was accessed.Research limitations/implications: Research demonstrates the extent to which airlines are using twitter as a communications tool and suggests that some airline are not currently utilising twitter to its full extent.Practical implications: The research provides information on current twitter use and penetration, thus enabling airlines to benchmark their performance in this social media channel.Originality/value: The paper provides an original empirical insight into a growing phenomenon which is currently underreported in academic literatures.

  5. Söder Airlines alustab Tampere-Tallinna lende / Toivo Tänavsuu

    Index Scriptorium Estoniae

    Tänavsuu, Toivo

    2003-01-01

    2002. aastal Soome ärimeeste loodud lennufirma Söder Airlines lennuk hakkab lendama Tallinna ja Tampere vahel, edaspidi kavatsetakse avada ka lennuliin Tampere-Kuressaare. Vt. samas: Lennust Eestisse huvitub ka SkyEurope

  6. Fuzzy-VIKOR analysis for customer performance index of civil domestic airline industry in India

    Directory of Open Access Journals (Sweden)

    Suman Saket

    2015-03-01

    Full Text Available This paper considers the factor influencing on an airline carrier based on operations of an airport on the routes flown out of that airport. This study deals with evaluation of the Customer Performance index (CPI of distinct domestic civil airlines in India. CPI consists of various parameters; among them many disembodied parameters, which are difficult to measure. In this context, initially we identified the prime factors that are crucial for evaluation of performances provided by various airlines in India. Thereafter, in order to determine the hierarchy among these factors; modified digital logic (MDL approach is employed and cost is found to be the most important criteria. Furthermore, CPI is calculated using fuzzy-VIKOR approach. Such approaches can help the airlines in re-evaluating their current policies and then formulate comparatively more efficient market strategies to improve performance quality and to gain customers’ loyalty.

  7. THE EVALUATION OF WORKING CAPITAL IN AIRLINE COMPANIES WHICH PROCEED IN BIST

    Directory of Open Access Journals (Sweden)

    Selcuk Kendirli

    2016-03-01

    Full Text Available The working capital like cash and liquid assets runs the facilities and supports daily activities of firms. This kind of capital is essential to continuity of activities, increase of volume, maintain credibility, reduce impacts of risks and to overcome with extraordinary situation. The working capital management is very important for making profits from activities, especially for dynamic sectors like aviation. The aviation industry which airline companies operate is a very dynamic sector. In this sector working capital has to be managed very professionally and carefully by airline companies. This study aims to assess the airline companies’ working capital in terms of effectiveness. Airline companies which shares traded on BIST will be sample of this study.

  8. Estimation of Airline Benefits from Avionics Upgrade under Preferential Merge Re-sequence Scheduling

    Science.gov (United States)

    Kotegawa, Tatsuya; Cayabyab, Charlene Anne; Almog, Noam

    2013-01-01

    Modernization of the airline fleet avionics is essential to fully enable future technologies and procedures for increasing national airspace system capacity. However in the current national airspace system, system-wide benefits gained by avionics upgrade are not fully directed to aircraft/airlines that upgrade, resulting in slow fleet modernization rate. Preferential merge re-sequence scheduling is a best-equipped-best-served concept designed to incentivize avionics upgrade among airlines by allowing aircraft with new avionics (high-equipped) to be re-sequenced ahead of aircraft without the upgrades (low-equipped) at enroute merge waypoints. The goal of this study is to investigate the potential benefits gained or lost by airlines under a high or low-equipped fleet scenario if preferential merge resequence scheduling is implemented.

  9. Journal of Airline and Airport Management: taking off on an exciting journey into air transport research

    OpenAIRE

    David Gonzalez-Prieto; Oriol Lordan; Jose M Sallan; Pep Simo; Mihaela Enache; Vicenc Fernandez

    2011-01-01

    We are pleased to introduce this first and inaugural issue of the first volume of the Journal of Airline and Airport Management (JAIRM). JAIRM is an international journal that proposes and fosters discussion on the theory and application in all areas of air transport, including (but not limited to) air transport and globalization, airline and airport management. We are interested in issues related to production, logistics, operations, marketing, policy and regulation, information systems, pro...

  10. Airline revenue management: an overview of OR techniques 1982-2001

    OpenAIRE

    Pak, K; Piersma, Nanda

    2002-01-01

    textabstractWith the increasing interest in decision support systems and the continuous advance of computer science, revenue management is a discipline which has received a great deal of interest in recent years. Although revenue management has seen many new applications throughout the years, the main focus of research continues to be the airline industry. Ever since Littlewood (1972) first proposed a solution method for the airline revenue management problem, a variety of solution methods ha...

  11. Airline revenue management: an overview of OR techniques 1982-2001

    OpenAIRE

    2002-01-01

    With the increasing interest in decision support systems and the continuous advance of computer science, revenue management is a discipline which has received a great deal of interest in recent years. Although revenue management has seen many new applications throughout the years, the main focus of research continues to be the airline industry. Ever since Littlewood (1972) first proposed a solution method for the airline revenue management problem, a variety of solution methods have been intr...

  12. A critical analysis of airline safety management with reference to pilots and aviation authority officers

    OpenAIRE

    Ho, Li-Chi

    1996-01-01

    When we consider regional differences in air safety, a call for regional solutions is needed. This research probes the current situation in Taiwan and part of Asia from a regional perspective, aiming to better understand safety management in this region. Data was drawn from an extensive survey involving both airline pilots and aviation authority officers. The research investigated respondents' perceptions in airline safety management, and examined at their opinions about the ro...

  13. Radiotystnad resulterar i fullt kaos : En studie om Malaysia Airlines kriskommunikation

    OpenAIRE

    Molander, Agnes; Nässlin Eidenert, Kim

    2014-01-01

    The purpose of this thesis is to study how Malaysia Airlines communicated during the two largest crises of 2014. Key questions to be answered are: Did organizational hypocrisy occur? If yes, in what way? Which communication strategies were used? Did the company mediate an unequivocal message and how was the information framed? Did any aggravating factors, which worsened the organization’s reputation, appear? How did Malaysia Airlines manage possible rumours? Was the word contact used as a key...

  14. Disruption management in the airline industry-Concepts, models and methods

    DEFF Research Database (Denmark)

    Clausen, Jens; Larsen, Allan; Larsen, Jesper;

    2010-01-01

    This paper provides a thorough review of the current state-of-the-art within airline disruption management of resources, including aircraft, crew, passenger and integrated recovery. An overview of model formulations of the aircraft and crew scheduling problems is presented in order to emphasize...... similarities between solution approaches applied to the planning and recovery problems. A brief overview of research within schedule robustness in airline scheduling is included in the review, since this proactive measure is a natural complement to disruption management....

  15. Service Quality towards Customer Loyalty in Malaysia‟s Domestic Low Cost Airline Services

    OpenAIRE

    Nor Sara Nadia Muhamad Yunus; Jamil Bojei; Wan Edura Wan Rashid

    2013-01-01

    Delivering high quality service to the passengers is imperative so that airline companies can survive and strengthen their competitiveness. Even though there have been extensive research on service quality and customer loyalty in the past, little study has been conducted in this specific area. Hence, this paper aims to propose a conceptual framework on service quality and its relationship towards customer loyalty among Malaysia’s domestic low cost airline services passengers. Reliability, tan...

  16. Optimization Model and Algorithm Design for Airline Fleet Planning in a Multiairline Competitive Environment

    OpenAIRE

    Yu Wang; Hong Sun; Jinfu Zhu; Bo Zhu

    2015-01-01

    This paper presents a multiobjective mathematical programming model to optimize airline fleet size and structure with consideration of several critical factors severely affecting the fleet planning process. The main purpose of this paper is to reveal how multiairline competitive behaviors impact airline fleet size and structure by enhancing the existing route-based fleet planning model with consideration of the interaction between market share and flight frequency and also by applying the con...

  17. Strategic reorientation and business turnaround: The case of global legacy airlines

    OpenAIRE

    Lawton, Thomas; Rajwani, Tazeeb; O’Kane, Conor

    2011-01-01

    Abstract Purpose - We illustrate how legacy airlines can reorientate to achieve sharp recoveries in performance following prolonged periods of stagnation, decline and eroding competitiveness. Design/methodology/approach - The authors use a qualitative analysis of five longitudinal case studies of legacy airlines that embarked on strategic change between 1997 and 2006. Data collection spanned ten years and included archival data, public documents, news clippings, accounts ...

  18. U.S. airline deregulation : the recent experience and some lessons for Ireland

    OpenAIRE

    Aisling J. Reynolds-Feighan

    1989-01-01

    In this paper, recent trends in U.S. commercial aviation are examined, so that an assessment may be made of the impact of the passage of the Airline Deregulation Act of 1978 on the industry and also on the national airways system. The key planning issues for airlines and airports are highlighted and placed in an Irish context to aid the planning strategies for a more competitive European environment.

  19. Low-cost and Traditional Airlines : Ratio Analysis and Equity Valuation by the Residual Earnings Model

    OpenAIRE

    Hanpobamorn, Saijai

    2007-01-01

    Fundamental analysts use basic fundamentals, which generally based on available public information, to determine a firm’s intrinsic value. Forecasting future performance is one of the key elements for doing fundamental analysis, and historical results are the foundation for future forecast. The analysis of this study is conducted into two sections with case studies in the airline business. Firstly, financial ratios are analyzed to examine whether low-cost or traditional airlines better perfor...

  20. Mobile commerce innovation in the airline sector: An investigation of mobile services acceptance in Saudi Arabia

    OpenAIRE

    Algethmi, Mohammed Abdu

    2014-01-01

    This thesis was submitted for the degree of Doctor of Philosophy and awarded by Brunel University The advancement of Information Technology (IT) has changed the business landscape in many industries and especially the airline sector. Modern Information Communication Technologies (ICT) provide powerful tools for organizations and can significantly influence their operation, structure, and strategy. The emergence of mobile technologies has created a new innovation for airline companies by in...

  1. Designing and Pricing Services Based on Customer-Perceived Value: An Airline Company Feasibility Study

    OpenAIRE

    Emmanuel Fragnière; Angela Lombardi; Francesco Moresino

    2012-01-01

    We propose a new integrated model for pricing airline tickets that takes into account the perceived value of multiple services associated with a given flight. For instance, clients perceive benefits on different attributes such as refund options, baggage allowances, time slots, days of operations, Web check-in services, as well as airline brand. These elements of perceived values are not, to our knowledge, modeled in existing yield management systems. Our integrated model includes a classical...

  2. A Comparative Facebook Content Analysis between Romanian and Western European Airline Carriers

    OpenAIRE

    Bogdan AVRAM

    2014-01-01

    This research aims to investigate the different social media strategies adopted by the airline companies from two European regions. In the attempt to land more customers on their social media runway, drive more sales from social media content, increase customer satisfaction through a high response rate or increase their brand awareness, the airlines combine creativity and high-quality ideas to better promote their products and services to customers all around the globe. The paper analyses the...

  3. Relationships, Layoffs, and Organizational Resilience: Airline Industry Responses to September 11

    OpenAIRE

    Gittell, Jody Hoffer; Cameron, Kim; Lim, Sandy; Rivas, Victor

    2005-01-01

    The terrorist attacks of September 11th, 2001 affected the U.S. airline industry more than almost any other industry. Certain of these companies emerged successful, however, and demonstrated remarkable resilience while others languished. This investigation identifies the reasons why some airline companies recovered successfully after the attacks while others struggled. Evidence is provided that layoffs after the crisis, while intended to foster recovery, instead inhibited recovery throughout ...

  4. An Empirical Analysis of the Competitiveness in the U.S. Airline Industry

    OpenAIRE

    Mahmoud M. Nourayi; Julie W. Suh

    2015-01-01

    The purpose of this paper is to investigate the competitiveness of the airline industry in the United States from 1982 to 2012. We examine the stochastic behavior of corporate profitability ratios using a balanced panel of publicly-traded U.S. Airline firms. In particular, we use a panel unit root approach to examine the persistence of profitability. Using a second generation panel unit root test developed by Pesaran (2007) that controls for cross-sectional dependence, we find some evidence t...

  5. Integrated Aircraft Fleeting, Routing, and Crew Pairing Models and Algorithms for the Airline Industry

    OpenAIRE

    Shao, Shengzhi

    2013-01-01

    The air transportation market has been growing steadily for the past three decades since the airline deregulation in 1978. With competition also becoming more intense, airline companies have been trying to enhance their market shares and profit margins by composing favorable flight schedules and by efficiently allocating their resources of aircraft and crews so as to reduce operational costs. In practice, this is achieved based on demand forecasts and resource availabilities through a structu...

  6. Incidence of cancer among Finnish airline cabin attendants, 1967-92.

    OpenAIRE

    Pukkala, E.; Auvinen, A; Wahlberg, G.

    1995-01-01

    OBJECTIVE--To assess whether occupational exposure among commercial airline cabin attendants are associated with risk of cancer. DESIGN--Record linkage study. SETTING--Finland. SUBJECTS-1577 female and 187 male cabin attendants who had worked for the Finnish airline companies. MAIN OUTCOME MEASURE--Standardised incidence ratio; expected number of cases based on national cancer incidences. RESULTS--A significant excess of breast cancer (standardised incidence ratio 1.87 (95% confidence interva...

  7. Interactive Inventory Monitoring

    Science.gov (United States)

    Garud, Sumedha

    2013-01-01

    Method and system for monitoring present location and/or present status of a target inventory item, where the inventory items are located on one or more inventory shelves or other inventory receptacles that communicate with an inventory base station through use of responders such as RFIDs. A user operates a hand held interrogation and display (lAD) module that communicates with, or is part of the base station to provide an initial inquiry. lnformation on location(s) of the larget invenlory item is also indicated visibly and/or audibly on the receptacle(s) for the user. Status information includes an assessment of operation readiness and a time, if known, that the specified inventory item or class was last removed or examined or modified. Presentation of a user access level may be required for access to the target inventgory item. Another embodiment provides inventory informatin for a stack as a sight-impaired or hearing-impaired person adjacent to that stack.

  8. The impact of Southwest Airline's contribution to atmospheric Carbon Dioxide and Nitrous Oxide totals

    Science.gov (United States)

    Wilkerson, Cody L.

    Over the last century, aviation has grown to become an economical juggernaut. The industry creates innovation, connects people, and maintains a safety goal unlike any other field. However, as the world becomes more populated with technology and individuals, a general curiosity as to how human activity effects the planet is becoming of greater interest. This study presents what one domestic airline in the United States, Southwest Airlines, contributes to the atmospheric make-up of the planet. Utilizing various sources of quantifiable data, an outcome was reached that shows the amount of Carbon Dioxide and Nitrous Oxide produced by Southwest Airlines from 2002 to 2013. This topic was chosen due to the fact that there are no real quantifiable values of emission statistics from airlines available to the public. Further investigation allowed for Southwest Airlines to be compared to the overall Carbon Dioxide and Nitrous Oxide contributions of the United States for the year 2011. The results showed that with the absence of any set standard on emissions, it is vital that one should be established. The data showed that the current ICAO standard emission values showed a higher level of emissions than when Southwest Airline's fleet was analyzed using their actual fleet mix.

  9. Airflow Characteristics at the Breathing Zone of a Seated Person

    DEFF Research Database (Denmark)

    Melikov, Arsen Krikor; Bolashikov, Zhecho Dimitrov; Nagano, Hideaki;

    2011-01-01

    A method for active control over the interaction between the free convection flow around occupant‘s body and locally applied airflow from front on the velocity field at the breathing zone of a seated person was studied. A workplace equipped with personalised ventilation (PV) generating flow from...... front/above against the face of a thermal manikin with realistic body shape and surface temperature distribution (used to resemble a seated human body) was set in a climate chamber (4.70 m x 1.62 m x 2.60 m). The air temperature in the chamber was kept at 20 0C. Ceiling diffuser supplied ventilation air...

  10. The Off-line Group Seat Reservation Problem

    DEFF Research Database (Denmark)

    Clausen, Tommy; Hjorth, Allan Nordlunde; Nielsen, Morten;

    2010-01-01

    In this paper we address the problem of assigning seats in a train for a group of people traveling together. We consider two variants of the problem. One is a special case of two-dimensional knapsack where we consider the train as having fixed size and the objective is to maximize the utilization...... of the seats in the train. The second is a special case of two-dimensional bin packing where all requests must be accommodated while trying to minimize the number of passenger cars needed. For both variants of the problem we present a number of bounds and develop exact algorithms. Computational results...

  11. Optimization of Semi-active Seat Suspension with Magnetorheological Damper

    Science.gov (United States)

    Segla, Stefan; Kajaste, J.; Keski-Honkola, P.

    The paper deals with modeling, control and optimization of semiactive seat suspension with pneumatic spring and magnetorheological damper. The main focus is on isolating vertical excitation from the cabin of a bucket-wheel excavator in order to protect the excavator driver against harmful vibration. Three different control algorithms are used to determine the desired semi-active damping force: skyhook control, balance control and combination of balance and skyhook controls. The dynamic behavior of the semi-active system is optimized using genetic algorithms. As the objective function the effective value of the seat (sprung mass) acceleration is used.

  12. Effect Of Vibration Amplitude Level On Seated Occupant Reaction Time

    OpenAIRE

    Amzar Azizan; Ratchaphon Ittianuwat; Zhengqing Liu

    2015-01-01

    The past decade has seen the rapid development of vibration comfort in the automotive industry. However little attention has been paid to vibration drowsiness. Eighteen male volunteers were recruited for this experiment. Before commencing the experiment total transmitted acceleration measured at interfaces between the seat cushion and seatback to human body was adjusted to become 0.2 ms-2 r.m.s and 0.4 ms-2 r.m.s for each volunteer. Seated volunteers were exposed to Gaussian random vibration...

  13. Release-rate calorimetry of multilayered materials for aircraft seats

    Science.gov (United States)

    Fewell, L. L.; Parker, J. A.; Duskin, F.; Speith, H.; Trabold, E.

    1980-01-01

    Multilayered samples of contemporary and improved fire-resistant aircraft seat materials were evaluated for their rates of heat release and smoke generation. Top layers with glass-fiber block cushion were evaluated to determine which materials, based on their minimum contributions to the total heat release of the multilayered assembly, may be added or deleted. The smoke and heat release rates of multilayered seat materials were then measured at heat fluxes of 1.5 and 3.5 W/cm2. Abrasion tests were conducted on the decorative fabric covering and slip sheet to ascertain service life and compatibility of layers

  14. Timber inventory using Landsat

    Science.gov (United States)

    Strahler, A. H.

    1984-01-01

    The results of recent efforts to apply Landsat MSS imagery, in concert with topological maps, to forestry timber inventories via the FOCIS program are reported. FOCIS (Forests Classification and Inventory System) was defined for inventorying the lumber volume of coniferous tree types in rugged terrain regions. Data from four bands serve as input for unsupervised clustering and iterative labeling of the elevation, slope angle, and subregions of interest. Simulated photographic maps are generated which serve as overlays for regular maps for assessing timber harvests and sales goals. Sample procedures followed in mapping the Eldorado region forests in the Sierra Nevada mountains are discussed.

  15. 基于销售协议的货运舱位控制竞争模型研究%Competition Model of Air Cargo Cabin Inventory Control Based on Sales Agreement

    Institute of Scientific and Technical Information of China (English)

    罗咪; 徐月芳

    2011-01-01

    Several airlines' cabin inventory control strategies in a competitive environment were investigated when the actual situation of domestic air cargo was considered. A mathematical model of long - term contract of cabin inventory control was established for profit equilibrium of airline. It can get the solution to balance the profit of airline. Hie model provides the theoretical reference to decision of airlines' cabin inventory control in the competitive market.%结合国内航空货运的实际情况,研究了在竞争环境下各航空公司所采取的舱位控制策略,以航空公司利润均衡为目标建立了长期合同舱位控制的数学模型,从而确定在竞争情况下各航空公司的收益均衡解,为航空公司竞争环境下的货运舱位控制决策提供理论参考.

  16. Cosmic radiation dosimetry in international flights argentine airlines

    International Nuclear Information System (INIS)

    Full text: Introduction: In commercial aviation the most important determinants of radiation exposure in humans are the altitude, latitude, flight duration and the solar cycle's period. This study was conducted to address this type of exposure trough radiation dosimetry. Method: The study was performed in the business-class cabin of an Airbus 340-200 aircraft, provided by Argentine Airlines, during 2 flights routes: New York-Miami-Buenos Aires (trans equatorial) and Buenos Aires-Auckland (circumpolar). Measurements addressed the electromagnetic spectrum or low Linear Energy Transfer (LET) and corpuscular radiation (High LET). The instruments used were an Ion Chamber (IC), to measure the ionizing component of radiation (i.e., gamma radiation), the SWENDI, to measure only the neutron component, and the Tissue Equivalent Proportional Counter (TEPC) for measuring all radiation types. Results: The routes' dose rates are presented in the table. TEPC rates agreed with the LET findings. The total dose rates of high latitude flights were higher than those of low latitude flights. The SWENDI (High LET) results for the flights over the equator, at low latitude, represented only 1/3 of the total radiation. The New York-Miami and Buenos Aires-Auckland flights, at high latitude, represented just under 1/2 of the Total radiation (-45%). Conclusion: Based on the results of this study, the annual dose rates of radiation exposure of air crew personnel serving on international flights offered by Argentine Airlines is between 3 and 7 mSv. This rate is higher than the maximum recommended for the general population by the International Commission on Radiological Protection (ICRP), which is 1 milli Sv./y. Therefore, these personnel must be officially considered 'Occupationally Exposed to Radiation' in way to provide the appropriate measures that must be implemented for their protection in accordance to ICRP guidelines. Dose(uSv): Route N Y-Miami, IC 6.07, SWENDI 5.07, TEPC 11.04; Route

  17. Advanced Infant Car Seat Would Increase Highway Safety

    Science.gov (United States)

    Dabney, Richard; Elrod, Susan

    2004-01-01

    An advanced infant car seat has been proposed to increase highway safety by reducing the incidence of crying, fussy behavior, and other child-related distractions that divert an adult driver s attention from driving. In addition to a conventional infant car seat with safety restraints, the proposed advanced infant car seat would include a number of components and subsystems that would function together as a comprehensive infant-care system that would keep its occupant safe, comfortable, and entertained, and would enable the driver to monitor the baby without having to either stop the car or turn around to face the infant during driving. The system would include a vibrator with bulb switch to operate; the switch would double as a squeeze toy that would make its own specific sound. A music subsystem would include loudspeakers built into the seat plus digital and analog circuitry that would utilize plug-in memory modules to synthesize music or a variety of other sounds. The music subsystem would include a built-in sound generator that could synthesize white noise or a human heartbeat to calm the baby to sleep. A second bulb switch could be used to control the music subsystem and would double as a squeeze toy that would make a distinct sound. An anti-noise sound-suppression system would isolate the baby from potentially disturbing ambient external noises. This subsystem would include small microphones, placed near the baby s ears, to detect ambient noise. The outputs of the microphone would be amplified and fed to the loudspeakers at appropriate amplitude and in a phase opposite that of the detected ambient noise, such that the net ambient sound arriving at the baby s ears would be almost completely cancelled. A video-camera subsystem would enable the driver to monitor the baby visually while continuing to face forward. One or more portable miniature video cameras could be embedded in the side of the infant car seat (see figure) or in a flip-down handle. The outputs of

  18. Operational Efficiency In The U.S. Airline Industry: An Empirical Investigation Of Post-Deregulation Era

    Directory of Open Access Journals (Sweden)

    Vitaly S. GUZHVA

    2010-12-01

    Full Text Available The purpose of this paper is threefold: (1 to examine the operational efficiency of U.S. airlines after the deregulation of 1978; (2 to investigate whether operational efficiency is associated with changes in financial position of firms in the industry and (3 to study if there is an observable pattern in the efficiency measures for large and small airlines. The results indicate that small U.S. airlines record higher scores than large U.S. airlines in four out of five efficiency measures examined. The exception is in the category of allocative efficiency where large airlines exhibit more optimal input mix of resources that their smaller counterparts. This superior mix of resources is consistent with cost minimization. In addition, the analysis shows that higher overall efficiency measures are associated with higher net profit margins of the airlines in the sample, while higher allocative efficiency seems to correlate with higher return on equity."

  19. National Emission Inventory

    Data.gov (United States)

    U.S. Environmental Protection Agency — The National Emission Inventory contains measured, modeled, and estimated data for emissions of all known source categories in the US (stationary sources, fires,...

  20. VA Enterprise Data Inventory

    Data.gov (United States)

    Department of Veterans Affairs — The Department of Veterans Affairs Enterprise Data Inventory accounts for all of the datasets used in the agency's information systems. This entry was approved for...