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Dissertations / Theses on the topic 'Star Alliance'

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Published: 4 June 2021
Last updated: 25 April 2022

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1

Keller, Klaus. "Regulatory aspects of airline alliances : a case study of Star Alliance." Thesis, McGill University, 2000. http://www.gbv.de/dms/spk/sbb/recht/toc/364628227.pdf.

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2

Holmgren, Henrik, Colin Platt, and Johan Svennerholm. "Capacity Performance Measures in International Airline Alliances : The case of Star Alliance." Thesis, Jönköping University, JIBS, EMM (Entrepreneurship, Marketing, Management), 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-1301.

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Background

Strategic alliances have become increasingly popular within the business world, they can be seen as a way to improve the total output of the firm. Over the last 10 years, the industry endured trying times, the most notable being the events of September 11, 2001. That event drastically changed airline traveling all across the world. It also showed the importance of collaborations in order to stay competitive. Star Alliance began in 1997 and has since then grown into

the world’s largest airline alliance with a total market share of 25.1%.

Purpose

The raison d’être of this study is to quantify and analyze the augmentation of load factors over time, in terms of distribution, as they pertain to capacity performance of allied carriers within Star Alliance.

Method

In order to fulfill the purpose, a deductive approach to the research has been taken. Furthermore, due to the nature of the data, a quantitative approach has been used within. Two hypotheses will be stated and several research questions as well.

Result

It can be clearly seen that distribution of load factors has transformed during the years. There is a shift in both the skewness and the kurtosis of the distributions that can be seen when examining the frequency distribution charts. The kurtosis increases and the skew decreases, measures that are positive for the airlines, while the anomalies of 0% and 100% load factor have remained stable throughout the years. A general increase in the average load factors has also been seen.

Conclusion

By analyzing the empirical findings, it is clear that the load factor of the allied members has increased and that the proportion of the denied boardings decreased in relation to the average load factor. This means that the alternative hypothesis was accepted in the first hypothesis and that the second alternative hypothesis was accepted in the second hypothesis. The research also reveals a generally increased mean which together with the changes in the skew and kurtosis lead to an acceptance of the beta distribution. Furthermore, higher load factors were shown to have a strong correlation with the increase in efficiency and decrease in overselling.

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3

Šiserová, Tatiana. "Forma spolupráce v mezinárodním obchodě." Master's thesis, Vysoká škola ekonomická v Praze, 2008. http://www.nusl.cz/ntk/nusl-77022.

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The basic idea of the diploma thesis is to analyze the functionality of alliances in the global economic environment. Thesis specializes on the particular type of alliance - airline alliance. It is structurally divided into three separated chapters. The first chapter follows the basic determinants of the alliances functioning, their structure, composition and typology. Its aim is to explain the most important factors necessary for understanding the main meaning of the chapters. It focuses on the main advantages and disadvantages of the companies involved in alliances. The second chapter focuses on the implementation of alliances in airline industry. It monitors their historical development, legislative and regulatory environment in which the alliances were established and exist. It focuses on mapping the European and American area. The third chapter compares advantages and disadvantages of large and small members of Star Alliance within the European, American and Asian market. It compares them on the level of regional comparison, and then based on comparative fundamental and technical analyses.
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4

LIMA, FRANCISCO CARVALHO DE. "STRATEGIC NETWORKS IN AVIATION INDUSTRY: VARIG - STAR ALLIANCE CASE." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2003. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=4269@1.

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As empresas do setor de aviação sempre celebraram acordos operacionais,no intuito de racionalizar operações e reduzir custos. Com o cenário mundial cada vez mais competitivo e conturbado, a integração em redes de alianças estratégicas torna-se um meio eficaz e cada vez mais comum de sobrevivência e excelência. O propósito desta dissertação de mestrado é abrir caminho para verificar a adequação da associação de empresas em blocos estratégicos no setor de aviação às suas estratégias individuais, por meio do estudo de caso da VARIG como membro da Star Alliance. O desempenho da VARIG também é levado em consideração no estudo como variável dependente, ajudando na compreensão desta adequação. O estudo teve como foco a VARIG, maior empresa aérea da América Latina, e sua associação à Star Alliance, maior aliança entre empresas aéreas atualmente existentes. Dispunha-se de vários bancos de dados para alimentar a pesquisa, provenientes de órgãos e associações ligadas à aviação civil no Brasil e no mundo. Também foram analisadas as percepções dos principais executivos da VARIG (envolvidos em atividades da Star Alliance) sobre a importância das alianças para a estratégia da VARIG, coletadas com auxílio de um questionário semi-estruturado como instrumento principal. O presente estudo procura, com o auxílio de um novo ferramental para realizar análises estratégicas na perspectiva relacional, analisar as implicações estratégicas da associação em Redes e Alianças sobre os negócios e estratégias da VARIG.
In order to rationalise operations and reduce costs, airlines have always celebrated operational agreements. As the world scenario becomes more competitive and turbulent, networks of strategic alliances become an effective and common tool for survival and excellence. The objective of this thesis is to pave the way for studies that verify the analysis of the strategic fit of companies in forming strategic blocks in the aviation industry by way of a case study of VARIG as a member of Star Alliance. Performance is also taken into consideration in the scope of the case study, as a dependent variable, so as to better assess the fit at issue. The study focuses on VARIG, the largest Latin American airline, and its association with Star Alliance, currently the greatest airline alliance. Several civil aviation organisations and associations, located in Brazil and world-wide, provide useful data banks for the research. With the help of a semi-structured questionnaire, the study also collected data regarding the perception of VARIGs main executives (those involved in Star Alliance activities) on the importance of alliances for VARIGs strategy. The study aims at analysing the strategic implications of VARIGs association in alliances for its businesses and strategies, using a new tool developed to carry out strategic analysis from a relational perspective.
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5

Fatahian, Roshanak, and Jenny Fritze. "Vilka effekter har strategiska flygallianser på flygbolag? : En fallstudie av SAS." Thesis, Södertörn University College, School of Business Studies, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:sh:diva-453.

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Flygbranschen är en bransch som är mycket känslig för omvärldsfaktorer. De senaste årens konjunkturnedgång, terrorattentat, epidemier, höga oljepriser samt rådande konkurrenstryck har resulterat i stora lönsamhetsproblem för många flygbolag.

Ett sätt att bli mer konkurrenskraftig och förbättra sin position på marknaden är att samarbeta i form av en strategisk allians. Idag finns det tre allianser i flygbranschen: Star Alliance, Oneworld och Skyteam. Den första globala alliansen var Star Alliance som bildades 1997. Företag har under många år samarbetat i olika former. Vissa forskare anser att ett företag inte längre kan välja mellan konkurrens eller samarbete, utan att det handlar om att kombinera de båda strategierna. Denna undersökning avser att ta reda på hur en strategisk flygallians påverkar ett flygbolag.

För att avgränsa studien valdes SAS och dess samarbete inom Star Alliance som undersökningsobjekt. Studiens syfte är således att genom en fallstudie undersöka hur ett nätverksbolag har påverkats av att ingå i en strategisk flygallians. Två intervjuer har genomförts, en med en person anställd på SAS med tidigare förflutet i Star Alliance och en med en konsult med mångårig erfarenhet av resebranschen.

Resultatet visar att alliansamarbetet inneburit en rad fördelar för SAS. Konkurrensen har mildrats, kostnader reducerats, intäkter och utvecklingsmöjligheter ökat. En av nackdelarna med att ingå i en strategisk allians är att beslutsprocesserna förlängs. Något som SAS dock inte upplever som ett problem då medlemskapet i alliansen varit av stor betydelse för dem.

De slutsatser vi har dragit av denna undersökning är att de nämnda fördelarna med allianssamarbete kan ha ett högt pris då det kostar att vara medlem. Vi tror dock att det kan vara värt att betala en summa då samarbetet kan vara av betydelse för flygbolagets överlevnad. Då flygbolagen även samarbetar med flygbolag utanför alliansen ifrågasätter vi strategisk allians som den enda samarbetsformen för att uppnå minskad konkurrens, kostnadsreduceringar, ökade intäkter och utvecklingsmöjligheter.

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6

Lo, Chun-chung Johnny, and 盧振忠. "Creative star: the strategic alliance of major transportation operators in Hong Kong." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1996. http://hub.hku.hk/bib/B31267543.

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7

Lo, Chun-chung Johnny. "Creative star : the strategic alliance of major transportation operators in Hong Kong /." Hong Kong : University of Hong Kong, 1996. http://sunzi.lib.hku.hk/hkuto/record.jsp?B17983265.

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8

Eriksson, Ingrid, and Lisette Wallman. "Att tillhöra ett nätverk : Samarbete och dess effekter hos flygbolag inom Star Alliance." Thesis, Södertörns högskola, Institutionen för ekonomi och företagande, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:sh:diva-9784.

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En företagsform som diskuterats och blivit allt mer etablerad under de senaste decennierna är nätverk. En utveckling startade då alternativa företagsstrukturer förändrades från en hierarkiskt uppbyggd organisationsstuktur till en mer decentraliserad sådan. På dagens marknad råder en allt hårdare konkurrens och anpassning krävs för att som enskilt företag kunna utvecklas och behålla sin plats på marknaden. Ett sätt att som företag bli starkare är att samarbeta med andra aktörer och genom detta arbetssätt komplettera varandra och ta del av betydelsefull kunskap och resurser. Syftet är med utgångspunkt i studiens valda teorier inom relationsmarknadsföring undersöka vad arbete enligt dessa teorier, alternativt ej arbete enligt dessa, skapar för effekter hos flygbolag inom en allians. Detta undersöks med applicering av flygbranschen, vilken är en bransch där många företag arbetar enligt en nätverksstruktur. För att kunna utöka sin marknad och nå nya geografiska områden samarbetar flygbolag för att kunna erbjuda sina resenärer fler destinationer och en utökad service. Detta leder till föredelar både för det enskilda företaget som för hela nätverket. Genom att arbeta enligt denna struktur medförs att konkurrenter istället blir samarbetspartners. Detta undersöks genom en kvalitativ studie med intervjuer av anställda inom vissa av medlemsflygbolagen i Star Alliance. Slutsatserna av vilka effekter ett samarbete enligt en nätverksstruktur medför är huvudsakligen fördelaktiga för de undersökta bolagen. De har visat en utveckling inom många områden med samarbetsrelationer till andra flygbolag som den största tillgången. Vissa brister har iakttagits i kommunikationsflödet inom organisationen men övervägande visas positiva effekter av arbete inom en flygbolagsallians.
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9

Joy-Johnson, Louise. "How do clients experience the alliance when working with the Mental Health Recovery Star in rehabilitation settings?" Thesis, Canterbury Christ Church University, 2016. http://create.canterbury.ac.uk/14995/.

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The Mental Health Recovery Star (MHRS) is a therapeutic tool and outcome measure, used widely in the UK and internationally for clients and keyworkers in mental health services to jointly assess and work towards client-centred recovery goals. As such it has been recognised as potentially offering a means of building a positive working alliance between clients and workers. The alliance is increasingly being highlighted as a key common factor across therapeutic models that may underpin positive clinical outcomes. This study employed Grounded Theory Methods to explore the alliance within the context of using the MHRS in rehabilitation mental health services. Semi-structured interviews were carried out with ten clients and four workers across three services. The findings are presented in a theoretical model that explains the core category that emerged from this study – “being engaged in working together towards improved wellbeing”. Working with the MHRS was seen to inform three particular alliance processes: collaborative working; negotiating new or shared perspectives; and motivation towards improved wellbeing. The findings also highlighted challenges that can hinder these processes when using the MHRS, calling for improvements in practices of negotiation and better support for workers. Further clinical implications alongside avenues for future research are discussed.
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10

McNaughton, Joanna. "Attachment Style, Therapeutic Alliance and Recovery in forensic mental health : the A-STAR study and clinical research portfolio." Thesis, University of Glasgow, 2016. http://theses.gla.ac.uk/7602/.

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Background: Research suggests that forensic mental health services and staff can play an important role in the recognition and intervention with attachment-related behaviours to promote engagement and recovery. There is a lack of literature exploring whether the attachment needs of forensic service-users are recognised and, associations between attachment style and factors predictive of recovery. Aims: This study aimed to examine the extent to which service-users and keyworkers agree about service-users’ attachment and to identify whether attachment was associated with service attachment, working alliance, ward climate and recovery. Methods: Twenty-two service-users from low and medium secure forensic services, completed questionnaire measures of their attachment style, service attachment, working alliance, ward climate and experiences of recovery. Nineteen keyworkers completed measures of the service-users attachment style and working alliance. Results: There was strong agreement between service-users and staff for attachment anxiety (ICC=0.71) but poor agreement for attachment avoidance (ICC=0.39). Service attachment was associated with more positive perceptions of staff support (r=0.49) and avoidant attachment was associated with lower ratings of recovery (r=-0.51). Correlations between attachment style and service attachment, working alliance and ward climate were small and non-significant. Conclusions: A focus on staff training to support recognition of the nature and impact of avoidant attachment styles is indicated. The findings suggest that interventions to enhance staff - service-user relationships may be important for service attachment and indeed promotion of a recovery focused orientation amongst service-users high in avoidant attachment may improve wellbeing and outcomes.
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11

Hongratana-Uthai, Narisara. "Diagnosing organisational culture and critical success factors for an airline : the case of Thai Airways International in Star Alliance." Thesis, University of Manchester, 2011. https://www.research.manchester.ac.uk/portal/en/theses/diagnosing-organisational-culture-and-critical-success-factors-for-an-airline-the-case-of-thai-airways-international-in-star-alliance(6d43d150-2526-45d8-8817-268613ecb7e6).html.

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In the past two decades, a need in forming strategic alliance has become increasingly important, especially for small companies. Likewise, airline alliances act as a vehicle for small carriers to obtain their superior position or to survive competition in a competitive international market where they do not appear to be a dominant player. In strategic alliances, the greater integration conveys greater benefits. However, the level of failure and success are varied among alliance members. This thesis was underpinned by the aim to conduct an in-depth study under the concept of organisational culture to reveal the key issues and barriers that appear to distort the ability of an organisation to foster success as well as to boost up its ability to obtain the benefits from the alliances to the maximum level.The empirical investigation employed a qualitative approach as a mechanism, driving this thesis through the process of research design, data collection, and data analysis. Using a single case study as a main technique, the case company of this thesis is Thai Airways. Data was collected through in-depth and semi-structured interviews. Data was analysed using thematic grouping and organised through NVIvo software.This thesis displayed the findings into two main themes. The first theme is associated with the activity to diagnose organisational culture, whereas the Competing Values Framework (CVF) was adopted as an initial framework. The main objectives are to develop a cultural profile for Thai Airways and to identify the key issues and barriers that distort the ability of Thai Airways to foster success. The key finding derived from this theme offered the identified problems and barriers derived from organisational culture. Using the Critical Success Factors (CSFs) method, the second theme is associated with the activity to identify the critical success factors for Thai Airways, deriving as a set of CSFs proposed to help enhance the ability of Thai Airways to obtain big firm's benefits. The outcome of this thesis could be considered as a new reference for the areas of organisational studies and the success of airlines, where the literature appears to be limited. More importantly, this thesis believed that the research journey offered an empirical experience reflecting a piece of organisational culture study in a non-Western context.
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Conaway, Kathryn A. "HEAD START TEACHERS’ INTENTIONS TO IMPLEMENT SUGGESTIONS FOLLOWING MENTAL HEALTH CONSULTATION: AN INVESTIGATION OF THE ROLES OF WORKING ALLIANCE AND TEACHER EFFICACY." Oxford, Ohio : Miami University, 2007. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=miami1182373197.

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13

Gates, Leslie C. "Why Mexican unions lost power : globalization, intra-elite conflict and shifting stat alliances /." Ann Arbor, MI : UMI, 2001. http://aleph.unisg.ch/hsgscan/hm00076907.pdf.

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14

Son, Pierre-Etienne, and Julien Dufour. "Resources accessibility for start-ups: The example of RBSUs." Thesis, Högskolan i Halmstad, Sektionen för ekonomi och teknik (SET), 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-14207.

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The aim is to describe how to build a foundation of resources in RBSUs by addressing the issues of access to and control on resources in order to understand this context and to further develop the language of RBSUs. The research lies in the interpretative field of inquiry. Abduction is used to combine empirical data with theoretical studies in order to try to investigate patterns that could give an understanding of the phenomena that is studied. Descriptive research approach using multiple-case study design is used. The first part of the theoretical frame of references explores existing theories on resources. This leads to RBSUs basic resources. The second part explores different means for accessing and controlling resources. The chosen approach is qualitative. Interviews have been conducted for data collection. Documents are gathered and analyzed to support the interviews. Following each stage of RBSUs development, it is described what resources are the most important ones to each RBSU and how they got access to and control over those resources. The major contribution is that RBSUs access and control their basic resources in different ways depending on the stage of the RBSU development. In addition, the findings describe and allow understanding how RBSUs‟ founders make their choices when it comes to build a foundation of resources in each of those stages.
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15

Ybanez, Sergio D. "Growth strategies : how software start-ups can leverage alliances, acquisitions, IPOs and venture capital." Thesis, Massachusetts Institute of Technology, 2007. http://hdl.handle.net/1721.1/42374.

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Thesis (S.M.)--Massachusetts Institute of Technology, System Design and Management Program, 2007.
Includes bibliographical references (leaves 144-148).
The identification of the different factors impacting a software start-up company's decision to pursue an alliance, acquisition, IPO or venture capital to sustain growth is the main objective of this research study. First and foremost on a software start-up company's list of reasons to pursue and engage in alliances is to leverage the incumbent's tangible and intangible assets. Other factors impacting their decision to leverage alliances include the opportunity to enhance stability and profitability and the opportunity to acquire key customers. Another key factor that encourages start-up company alliance or strategic partnership formation is the need for the start-up company to establish platform leadership. Like the pursuit of alliances, foremost on a software start-up company's list of reasons to pursue and engage in acquisitions is to leverage the incumbent's or the acquirer's tangible and intangible assets. Other factors impacting their decision to get acquired include the boost such an acquisition will provide in helping them establish platform leadership. Acquisitions are also pursued by start-up companies when the founders want to exit. Start-up companies also pursue to get acquired to survive, when no other option are available. Lastly, they would opt to get acquired to penetrate new markets. Given optimal economic conditions, IPOs capture the best liquidity and valuation. It is advantageous versus getting acquired in that one gets to sustain growth while retaining control of the software start-up company. Software start-up companies seek venture capital funding for a number of factors. This includes getting help in business development, leveraging the VC network, obtaining a certification effect, diversifying net worth and reducing risk, and pursuing and engaging in alliances successfully.
(cont.) There is no one universal paradigm to help a software start-up company determine when it is best to pursue an alliance, an acquisition, an IPO or venture capital. A myriad of factors specific to one's situation impacts the decision to choose the right growth strategy. To make the most informed decision, the executive team must consider all these factors.
by Sergio D. Ybanez.
S.M.
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16

Proton, Vincent. "Caractérisation et compréhension du comportement en corrosion de structures en alliage d'aluminium-cuivre-lithium 2050 assemblées par Friction Stir Welding (FSW)." Phd thesis, Toulouse, INPT, 2012. http://oatao.univ-toulouse.fr/8303/1/proton.pdf.

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A l'heure où les matériaux composites prennent une part toujours plus importante dans les structures aéronautiques, l'utilisation de l'alliage d'aluminium-lithium 2050 assemblé par Friction Stir Welding (FSW) est envisagé pour remplacer les structures rivetées en alliages d'aluminium traditionnels. L'objectif global de ce travail de thèse était d'étudier le comportement en corrosion et en corrosion sous contrainte de joints soudés FSW de l'alliage d'aluminium-lithium 2050 mais aussi l'influence d'un post-traitement thermique sur les comportements observés. Dans ce but, la microstructure, le comportement mécanique et le comportement en corrosion et en corrosion sous contrainte de l'alliage 2050 servant de matériau de base à l'élaboration des joints soudés FSW ont d'abord été analysés ; ensuite, nous nous sommes focalisés sur le comportement en corrosion et en corrosion sous contrainte des structures FSW proprement dites, en analysant bien entendu la microstructure complexe de ces joints soudés et les propriétés mécaniques résultantes. Les résultats obtenus montrent que l'alliage 2050, bien que sensible à certaines formes de corrosion, semble bien plus performant que les alliages d'aluminium traditionnellement utilisés en aéronautique. Sa sensibilité à la corrosion sous contrainte notamment est très faible. Les structures FSW, après traitement thermique post soudage, ont également un très bon comportement en corrosion et en corrosion sous contrainte. Les joints soudés FSW de l'alliage d'aluminium-lithium 2050 apparaissent donc comme une solution très prometteuse pour l'industrie aéronautique.
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Monroy, García Ángela Cristina, and Skrollan Madita Schwarz. "Assessing partnerships to reach customers in water-stressed regions." Thesis, KTH, Industriell ekonomi och organisation (Inst.), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-253365.

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Water has been classified as an increasingly stress resource, according to the last World Water Development Report. Concerns about clean drinking water and water sanitation are also focal points of the Sustainable Development Goals (SDGs). Moreover, small and medium-sized enterprises (SME), as well as start-ups, are interested in water management innovation and reaching countries with difficult access. This project is motivated by a desire to identify and classify the challenges of reaching water-stressed regions or people living at the bottom of the pyramid (BOP) that are facing water scarcity as well as the aim to recognize approaches of how partnerships - strategic alliances, joint ventures, co-opetition, and buyer-supplier relationship - address some of those challenges. The importance of partnerships, their specific motives, and the assets and activities interchanged in each experience, have been examined through different interviews. By focusing attention on the relation between challenges, partnerships, and business model levels, this paper suggests that partnerships are essential to reach emerging markets, but not all of them are valuable at the earlier stages of a start-up. In addition, according to the challenges that are expected to address, a particular type of partnership should be established, which implies different adaptations in the business model. Therefore, the contribution of this study is to provide orientation to small companies on how to use partnerships based on the challenges to overcome reaching regions with water scarcity.
Vatten har klassificerats som en resurs som allt mer drabbas av vattenstress enligt senaste rapporten från World Water Development. Bekymmer om rent dricksvatten och vattenrening hamnar i fokus i de Globala målen för hållbar utveckling (SDG). Dessutom fokuserar små till medelstora företag och startups är intresserade av innovation inom vatten management och att nå länder där tillgång till vatten är svår. Detta projekt motiveras av en vilja att identifiera och klassificera utmaningarna av att nå vattenstressade regioner och människorna som lever i botten av pyramiden (BOP) som drabbas av vattenbrist och att hitta de metoder som med samarbetspartners, strategiska samarbeten, samriskföretag och leverantörssamarbeten kan hjälpa med dessa utmaningar. Betydelsen av samarbeten, deras specifika mål och tillgångar och aktiviteter som spridits i form av utbyte för varje händelse har examinerats genom olika intervjuer. Genom att fokusera på sammanhanget mellan utmaningarna, samarbeten och olika nivåer av affärsmodeller föreslår denna studie att samarbeten är grundläggande för att kunna nå utvecklingsområden, men inte alla är viktiga i de tidigare skeden i en startup. Dessutom enligt de utmaningar som uppkommer, en speciell typ av samarbete ska etableras som innebär olika anpassningar av affärsmodellen. Därför bidrar denna studie till att ge små företag riktlinjer på hur man använder sammarbetspartnerskap baserat på utmaningarna för att nå de regioner som har vattenbrist.
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Dhondt, Matthieu. "Corrosion sous contrainte intergranulaire du noyau de soudure par FSW de l'alliage Al-Li 2050." Thesis, Bordeaux 1, 2012. http://www.theses.fr/2012BOR14738/document.

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Pour réduire le poids des structures aéronautiques, plusieurs voies ont été explorées. Parmi elles, l'utilisation des alliages d'aluminium légers et le remplacement des structures rivetées par des structures soudées par Friction Stir Welding (FSW) sont envisagées. La question de la durée de vie de ces structures préoccupe les industriels. Dans ce cadre, cette étude porte sur la sensibilité à la corrosion sous contrainte intergranulaire (CSC-IG) du noyau de soudure par FSW de l'alliage Al-Cu-Li 2050. Ce matériau est composé de grains équiaxes dont la taille diminue de 17 à 4 µm à mesure que l'on s'éloigne de la surface de soudage. Une variation de texture est révélée grâce à des cartographies EBSD formant la microstructure des « onion rings ». La périodicité de ces « onions rings » est égale à l'avancée du pion FSW sur un tour (500 µm pour notre matériau). Ces hétérogénéités microstructurales entraînent des gradients de champs mécaniques locaux quantifiés par corrélation d'images lors des essais mécaniques. Ces hétérogénéités microstructurales et mécaniques favorisent les phénomènes de corrosion localisée lorsque le matériau est soumis à un environnement agressif. Les effets des contraintes et de la microstructure sur la CSC-IG sont mis en évidence par des essais de corrosion et des essais de corrosion sous contrainte (CSC). Les essais de corrosion montrent une sensibilité du matériau à la piqûration alors que les essais de CSC révèlent l'amorçage de fissures intergranulaires. Les plus grosses fissures s'amorcent préférentiellement à la frontière des « onion rings ». Un modèle par éléments finis a été développé dans le but de simuler la propagation des fissures intergranulaires sur des agrégats réels générés par des cartographies EBSD
To reduce the aircraft components weight, several solutions were explored. Among them, the using of light aluminum alloys and the substitution of riveting by friction stir welding (FSW) are investigated. Industry is concerned by the question of the life of such structures. For this, this study is focused on intergranular stress corrosion cracking (IGSCC) sensitivity of the 2050 Al-Li-Cu alloy friction stir weld nugget. This material consists of equiaxed grains whose size is decreasing with the distance from the weld surface between 17 µm at the top and 4 µm at the bottom. The “onion rings” microstructure is revealed by EBSD cartographies as a texture variation. They appear with a periodicity of 500 µm corresponding to the advance per revolution of the tool. Those microstructural heterogeneities cause local mechanical field gradients quantified by digital image correlation measurements during mechanical tests. Those microstructural and mechanical heterogeneities promote localized corrosion when the material is submitted to an aggressive environnement. Microstructure and stress effects on IGSCC are shown by corrosion tests and stress corrosion tests. The first ones show a sensitivity to pitting corrosion and a stress application reveal initiation of intergranular cracks. The biggest ones preferentially initiate at “onion rings” boundaries. A finite element model was developed in order to simulate intergranular cracks propagation on real aggregates obtained by EBSD cartographies
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19

Guedoiri, Ammar. "Contribution à la modélisation et à la simulation numérique du soudage par friction et malaxage." Phd thesis, Paris, ENSAM, 2012. http://pastel.archives-ouvertes.fr/pastel-00842393.

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Le soudage par friction malaxage " Friction Stir Welding " est un procédé d'assemblage de pièces en phase semi solide. Le cordon de soudure est obtenu grâce à un outil de révolution composé d'un épaulement et d'un pion. Ce procédé utilise le principe de la conversion de l'énergie mécanique en énergie thermique par frottement de l'outil avec les pièces à assembler. Ce travail de thèse est une contribution à la modélisation expérimentale et à la simulation numérique de ce procédé permettant de fournir des modèles pour aider à la compréhension des phénomènes thermiques et mécaniques ainsi que les interactions entre les paramètres de soudage. Les études expérimentales sont principalement orientées vers la caractérisation de l'écoulement de matière à l'aide de marqueurs et vers l'optimisation des paramètres du procédé. L'effet de la géométrie de l'outil (outil à pion cylindrique ou outil avec méplats) sur l'écoulement de la matière au cours du soudage est étudié. Pour représenter la géométrie de l'écoulement et prédire les champs thermiques et mécaniques à l'état stationnaire, des modèles formulés sur la base de la dynamique des fluides sont adoptés dans la présente thèse. Deux modèles thermomécaniques sont développés: (1) un premier modèle numérique construit sous Fluent permet d'étudier le comportement thermomécanique et l'écoulement au cours du soudage FSW. Une loi de comportement dépendante de la température et de la vitesse de déformation est utilisée et une discussion sur les conditions de contact entre l'outil et les plaques à souder est présentée. Les résultats de l'écoulement sont comparés avec ceux obtenus expérimentalement dans le cas de suivi des trajectoires de particules de cuivre. (2) un deuxième modèle original basé sur une procédure itérative est mis en œuvre permettant le soudage de plaque de grandes dimensions. En effet, pour une meilleure prise en compte des conditions aux limites thermiques, un modèle thermomécanique construit autour de l'outil de soudage et couplé avec un modèle thermique pour tout le reste du domaine étudié. Ce modèle permet de prendre en compte le transfert de chaleur dans l'outil et dans la plaque support. Les cycles thermiques et la plage de viscosité pour deux alliages d'aluminium (AA7020-T6 et AA6061-T3) sont analysés et comparés avec succès aux résultats expérimentaux. Les efforts et le couple de soudage calculés numériquement sont validés par rapport à la littérature.
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20

Oplatková, Hana. "Žiju tarot." Master's thesis, Vysoké učení technické v Brně. Fakulta výtvarných umění, 2012. http://www.nusl.cz/ntk/nusl-232344.

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Private deck of cards created during six-month survey and documentation of daily experiences. The package contains 49 cards and it is inspired by a set of 78 tarot cards. Text content - reverse side of the card was created using diary notes. Face side of the card was chosen as a representation of processes taking place usually in days when the card was read.
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21

Hsu, Cheng Ju, and 許呈如. "The Alliance Problem on Trees and Star Networks." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/99352616712943158658.

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博士
國立臺灣科技大學
資訊管理系
97
The alliance problem is a relatively new concept in graph theory and has many interesting and practical variations. Global defensive alliance problem and security problem are two representative problems for showing usefulness to this research field. A lot of graph theorists have much been attracted by these two alliance related problems. This dissertation discusses global defensive alliance problem and security problem on two well-known interconnection networks, namely trees and star networks. This dissertation focuses on the characteristics of trees and star networks and finds useful properties for solving aforementioned problems. The first subject of this dissertation is to find a critical global defensive alliances on star networks. The result is helpful to derive an upper bound to the size of the minimum global (strong) defensive alliances in star networks. The second subject of this dissertation is to propose an algorithm for solving a variation of the security problem. For including a predetermined vertex in a secure set, we are trying to find the minimum secure set on trees and star networks. We use the dynamic programming techniques to find a minimum secure set containing the predetermined vertex on trees. Besides, we also find a secure set with a predetermined vertex on star networks and then establish an upper bound to the dimension of star networks.
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22

Nasser, Walid Samir Samy Moheb Abdelrahman. "Strategic alliances in the South African independent 3 star and above hotels." Diss., 2012. http://hdl.handle.net/2263/26821.

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This research was conducted to identify whether South African 3 star and above hotels are interested in forming alliances. The objective of this study was to group South African independent 3 star and above hotels on the alliance framework continuum, namely; cooperation, collaboration, coordination and coadunation; and to identify whether South African independent 3 star and above hotels are interested to progress from one simple form of alliance to the next complex, formal type of alliance. Hypotheses were proposed to determine the significance of the differences in preference of South African 3 star and above independent hotels. Thus, this study is descriptive in nature, to test the proposed hypotheses. An extensive investigation into the relevant literature was done. An empirical study was also conducted and the measuring instrument consisted of a selfadministered questionnaire. The population selected consisted of managers of these South African 3 star and above independent hotels. The major findings included: South African independent 3 star and above hotels seem to prefer niche personality and potential non-financial relationship, while they try to avoid economic and cultural integration with a partner firm and not interested in shared management control with the partner firm. Besides, four factors confirmed the alliance continuum developed by Bailey and Koney (2000), namely; cooperation, coordination, collaboration and coadunation. Friedman’s test indicated that there is significant difference among the different dimensions of alliance formation, namely; cooperation, collaboration, coordination and coadunation and that South African independent 3 star and above hotels are interested to form cooperation form of alliances mostly, followed by coordination form of alliances. South African independent 3 star and above hotels are neutral on whether to form collaboration type of alliances and they are not interested to involve in the coadunation form of alliances. Chi-square test indicated that there is no significant difference on the opinion of the respondents on whether the hotel they work for needs to progress from simpler form of alliances into more formal and complex format of alliances. However, those who preferred that their hotel has to progress from simpler form of alliance are higher in number than those who did not prefer. It was, inter alia, recommended that as South African 3 star and above hotels choose lower form of alliance, value chains seem the most applicable form of alliance. Hotels could share a name, reservation information and some basic IT facilities (point of sale IT reservation equipment and back office IT equipments). Finally, the study concludes by recommending that South African independent 3 star and above hotels should take alliances as an option for growth and justification of expenditures and decide the level of alliance continuum they want to engage in.
Dissertation (MBA)--University of Pretoria, 2012.
Gordon Institute of Business Science (GIBS)
unrestricted
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23

"Strategic networks in aviation industry: varig star alliance case." Tese, MAXWELL, 2003. http://www.maxwell.lambda.ele.puc-rio.br/cgi-bin/db2www/PRG_0991.D2W/SHOW?Cont=4269:pt&Mat=&Sys=&Nr=&Fun=&CdLinPrg=pt.

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24

Lainesse, Mélissa. "Impact d'une alliance globale sur la profitabilité attendue des firmes membres et non membres : étude événementielle de Star Alliance et Oneworld /." 2002. http://proquest.umi.com/pqdweb?did=766552461&sid=1&Fmt=2&clientId=9268&RQT=309&VName=PQD.

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25

MARTINEAU, P. "L'efficacité des pratiques de gestion des ressources humaines dans un contexte d'alliance stratégique internationale: le cas de Star Alliance." Thèse, 1999. http://hdl.handle.net/1866/1620.

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26

Hlinovský, Šimon. "TOP 09 a STAN jako aliance stran." Master's thesis, 2014. http://www.nusl.cz/ntk/nusl-333799.

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This work deals with a phenomenon of party alliances, especially with the alliance of TOP 09 and STAN. This phenomenon is current in the Czech politics. This work concerns other unions of the right-wing or the center parties in the Czech Republic too, and searches an answer for the question, if it is an alliance. Primarily this work deals with the alliance of TOP 09 and STAN, which were established in 2009. It also deals with differencies of this alliance on the state, regional and local level, and searches any cleveages of this alliance on the state, regional or local level. This work also searches the answer for the question, what the perspectives of this alliance in the future are. The first agreement about the alliance was confirmed in 2009. The second agreement was confirmed in 2013. This agreement enables free relationship between TOP 09 and STAN on the regional and local levels.
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Hlinovský, Šimon. "TOP 09 a STAN jako aliance stran." Master's thesis, 2015. http://www.nusl.cz/ntk/nusl-336420.

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This work deals with a phenomenon of party alliances, especially with the alliance of TOP 09 and STAN. This phenomenon is current in the Czech politics. This work concerns other unions of the right-wing or the center parties in the Czech Republic too, and searches an answer for the question, if it is an alliance. Primarily this work deals with the alliance of TOP 09 and STAN, which were established in 2009. It also deals with differencies of this alliance on the state, regional and local level, and searches any cleveages of this alliance on the state, regional or local level. This work also searches the answer for the question, what the perspectives of this alliance in the future are. The first agreement about the alliance was confirmed in 2009. The second agreement was confirmed in 2013. This agreement enables free relationship between TOP 09 and STAN on the regional and local levels.
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28

Morales, Jhovana Stefani Basto. "Internationalization strategy of a start-up to the Latin American market." Master's thesis, 2016. http://hdl.handle.net/10362/18250.

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The purpose of this study is to investigate and describe the internationalization process of the Easy Easy Apps Start-up choosing strategic alliances as entry mode. To understand the internationalization of start-ups is important to know how they do business in international markets. Furthermore, a strategic alliance perspective gives a critical insight of firms’ strategy to challenge in global competition. This project reflects the need to internationalize the Easy Easy Apps Company, in order to continue fulfilling its goals to become the number one App builder company in Latin America, increase its sales and have further risk diversification. The purpose is to find the best way for the company to internationalize and get a bigger market share.
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29

Perez, L., Jeryl M. Whitelock, and J. Florin. "Learning about customers: Managing B2B alliances between small technology startups and industry leaders." 2013. http://hdl.handle.net/10454/6131.

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Purpose - The aim of this paper is to gain a better understanding of how small technology start-ups learn about a key customer in the context of B2B relationships, and to propose a model of interfirm learning with customers. Design/methodology/approach - Using a qualitative case-based approach, the authors immerse themselves in the development of three learning alliances between technology startups and industry leaders, two successes and one failure, to gain an in-depth understanding of the dynamics involved. Data were collected on both sides of the alliance dyad. Findings - The paper delineates four learning cycles: alliance inception, joint-learning, specialization and discovery. These learning cycles constitute sequences of increasing understanding, cooperation, and higher order learning between the partners; evolving from an exchange of existing knowledge to the joint development of new knowledge. Originality/value - This study contributes to an integration of the alliance and marketing literatures by offering empirical evidence of a different type of alliance, namely the reciprocal learning alliance. It also contributes to broadening our understanding of market orientation in inter-organizational settings. In the context of business-to-business relationships, the study has identified four critical dimensions of learning alliance success, and proposed how they could be measured: Learn about customers; Interact with customers; Customer-specific investments; and Co-develop breakthrough innovations. Finally, the study demonstrates the significant role played by 'committed champions'.
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