Global ETD Search

171	Analyse de l'introduction de l'EDI dans les entreprises congolaises : une contribution à l'impact organisationnel des TI / EDI adoption's analysis in Congolese firms : an organizational structure impact of IT. Ivinza-Lepapa, Alphonse Christian 07 December 2007 (has links) Résumé Le cadre théorique de la contingence structurelle associe généralement « contexte, structure et performance » (Burns et Stalker, 1961; Woodward, 1965; Lawrence et Lorsch, 1967 ; Mintzberg, 1979).Le besoin de tester cette théorie dans l’environnement d’un pays sous développé (PSD) nous a conduit, dans cette recherche, à l’utilisation d’un cadre réduit basé uniquement sur des liens entre la technologie (remplacée par TI) et la structure (Galbraith, 1972 ; Lacrampe, 1974 ; Leifer, 1988). Notre cadre théorique s’appuie sur les approches managériales, économiques et organisationnelles des TI et de l’EDI (Leavitt, 1968 ; Scott Morton, 1991). Il utilise la théorie contingente de la gestion comptable (Otley, 1980; Chapman, 1997) et des systèmes d’information comptable AIS (Sutton, 1995; Maudlin et Ruchala, 1999; Baldwin et alii, 2000; Dunk, 2001) comme domaine d’opérationnalisation (système d’information fonctionnel). Ce travail commence par la constitution d’une boîte à outils contenant toutes les notions de base à utiliser (théories organisationnelles, TI - technologies de l'information, réseaux informatiques et EDI – échange des données informatisées), conformément aux principes fondateurs du MIS basés sur trois disciplines : Computer, Management et Organization Sciences (Culman et Swanson, 1986). La grille de lecture de la littérature est inspirée par la taxonomie de Urbaczenski, Jessup and Wheeler (2002) qui propose quatre catégories de recherche : économique, organisationnelle, technique et autre. Cette revue de la littérature permettra de proposer un modèle de recherche d’impact des TI et de l’EDI basé sur le cadre de référence structuro - fonctionnaliste et élaboré selon les principes de la théorie des systèmes. Le modèle de recherche utilise une structure causale conçue suivant l’impératif technologique (Markus et Robey, 1988). Il vise à expliquer l'impact organisationnel des TI à travers la stratégie (Porter et Millar, 1985; Wiseman, 1985 ; Palvia, Palvia et Zigli, 1990) sur la conception des MIS / AIS et des structures organisationnelles dans les entreprises d’un pays sous développé (PSD). Ce modèle d’impact organisationnel teste les hypothèses proposées, à partir des données d’une observation longitudinale (1970 à 2002) de quatorze (14) entreprises de la République Démocratique du Congo. Les entreprises échantillonnées de façon non probabiliste en deux catégories sont observées à travers l'introduction de l'EDI dans le système d’information comptable. Les tests de structure des données et de fonctionnement du modèle établissent l’impact des TI sur les structures organisationnelles et parfois sur les systèmes d’information, mais avec des nuances d’atténuation et de contribution suivant la nature de l’environnement ou l’usage de la stratégie. La conclusion de cette étude propose un processus d’apprentissage aux managers congolais pour éviter les dysfonctionnements organisationnels lors de l’adoption d’une nouvelle TI. Elle pose aussi le problème de validité des structures causales utilisées dans les recherches pour analyser l’impact organisationnel des TI. Abstract EDI adoption’s analysis in Congolese firms : an organizational structure impact of IT This research aims to identify the impact of IT (information technology) on organizational structure transformation in the firms of an under developed country. The framework of the contingency theory generally associates "context, structure and performance" (Burns and Stalker, 1961; Woodward, 1965; Lawrence and Lorsch, 1967; Mintzberg, 1979). The model of impact of TI and EDI suggested by this research uses a reduced framework only based on links between technology (replaced by IT) and structure (Galbraith, 1972; Lacrampe, 1974; Leifer, 1988). Based on the original paradigm of MIS, our theoretical framework uses managerial, economic and organizational approaches of IT and EDI (Leavitt, 1968; Scott Morton, 1991). It uses the contingent theory of accounting management (Otley, 1980; Chapman, 1997) and of accounting information systems (AIS - Sutton, 1995; Maudlin and Ruchala, 1999; Baldwin and alii, 2000; Dunk, 2001) as empirical field (functional information system). This workshop begins with the constitution of a toolbox containing all basic concepts to use (organization theories, IT - information technologies, computer networks and EDI – electronic data interchange), in accordance with the original MIS paradigm founded on three disciplines: Computer, Management and Organization Sciences (Culman and Swanson, 1986, p. 298). Then, we draw a theoretical framework of analysis which begins with a literature review inspired by Urbaczenski, Jessup and Wheeler’s taxonomy (2002). This literature review will allow to proposing a research model of IT and EDI designed according to the functionalist framework and system theory principles. The model of research uses a causal structure conceived according to the technological imperative (Markus and Robey, 1988). It aims at explaining the organizational impact of IT through the strategy (Porter and Millar, 1985; Wiseman, 1985; Palvia, Palvia and Zigli, 1990) on the design of MIS / AIS and the organizational structures in the companies of an under developed country (UDC). This study tests the hypotheses of the organizational impact‘s model suggested, basing from the data of a longitudinal observation (1970 to 2002) of fourteen (14) Congolese firms. The companies sampled by convenience in two layers are observed through the introduction of EDI into the accounting information system. The tests of data structure and of operating model performed on the introduction of accounting EDI, confirm the impact of IT on the organizational structures and sometimes on the information systems - IS. That with nuances of attenuation and contribution according to the nature of the environment or the use of the strategy. The conclusion of this study proposes a process of training to the congolese managers to avoid the organizational dysfunctions during the adoption of new IT. It poses also the problem of validity of the causal structures used in research to analyze the organizational impact of IT. Management information system (MIS) Information technology (IT) Electronic data intrechange (EDI) Système d’information comptable (AIS) Théorie contingente de la gestion c Organizational structure Contingency theory of AIS Under developed countries (UDC) Congo (Democratic Republic) Pays sous développé (PSD) Contingency theory of organization Structure organisationnelle Systemic structure Structure systémique Casual structure Structure causale Computer based accounting informat Accounting information system (AIS) Théorie de la contingence structurelle Système d’information de gestion Echange de données informatisées (E Technologie de l’information (TI)
172	Mobile Apps and the ultimate addiction to the Smartphone : A comprehensive study on the consequences of society’s mobile needs Beckhusen, Benedict January 2016 (has links) The smartphone is omnipresent and is cherished and held close by people. It allows for constant connection within a digitally connected society, as well as for many other purposes such as leisure activity or informational purpose. Within the Information Systems studies deeper investigation is required as to what impact this “taken – for – granted” mobile access to information and mobile apps has for individuals and society and if a “technological addiction”can be developed when using the smartphone for everything during the day on such a constant basis. The aim of this study was to understand the role of the smartphone in society and to shed light on this unclear relationship between the constant use of a smartphone and its development towards an addictive quality. To reach a conclusion, in depth – interviews were conducted with participants about their relationship to the smartphone and their smartphone use based on questions derived from literature on mobile communication technologies and the types of digital addictions existing. The results are that the smartphone is a device that seamlessly integrates into our daily lives in that we unconsciously use it as a tool to make our daily tasks more manageable, and enjoyable. It also supports us in getting better organized, to be in constant touch with family and friends remotely, and to be more mobile which is a useful ability in today’s mobility driven society. Smartphones have been found to inhabit a relatively low potential to addiction. Traits of voluntary behaviour, habitual behaviour, and mandatory behaviour of smartphone use have been found. All of these behaviours are not considered a true addiction. In the end, it seems that the increase of smartphone use is mainly due to the way we communicate nowadays digitally,and the shift in how we relate to our social peers using digital means. Millenials Ubiqutious Mobile Technologies Impact of Smartphones on Society Mobile needs of Society Mobile Information Systems (MIS) Information Society Mobile Computing Social Apps Social Apps Addiction Smartphone Smartphone Addiction Technological Addiction Social Network Addiction Information Systems Media and Communication Technology Medieteknik Information Systems, Social aspects Arbetsmedicin och miljömedicin Substance Abuse Beroendelära Other Health Sciences Annan hälsovetenskap Other Computer and Information Science Annan data- och informationsvetenskap Human Aspects of ICT Mänsklig interaktion med IKT Information Systems, Social aspects
173	Analyse de l'introduction de l'EDI dans les entreprises congolaises: une contribution à l'impact organisationnel des TI / EDI adoption's analysis in congolese firms: an organizational structure impact of IT Ivinza Lepapa, Alphonse C. 07 December 2007 (has links) Résumé<p>Le cadre théorique de la contingence structurelle associe généralement « contexte, structure et performance » (Burns et Stalker, 1961; Woodward, 1965; Lawrence et Lorsch, 1967 ;Mintzberg, 1979).Le besoin de tester cette théorie dans l’environnement d’un pays sous développé (PSD) nous a conduit, dans cette recherche, à l’utilisation d’un cadre réduit basé uniquement sur des liens entre la technologie (remplacée par TI) et la structure (Galbraith, 1972 ;Lacrampe, 1974 ;Leifer, 1988). <p>Notre cadre théorique s’appuie sur les approches managériales, économiques et organisationnelles des TI et de l’EDI (Leavitt, 1968 ;Scott Morton, 1991). Il utilise la théorie contingente de la gestion comptable (Otley, 1980; Chapman, 1997) et des systèmes d’information comptable AIS (Sutton, 1995; Maudlin et Ruchala, 1999; Baldwin et alii, 2000; Dunk, 2001) comme domaine d’opérationnalisation (système d’information fonctionnel).<p>\ / Doctorat en Sciences économiques et de gestion / info:eu-repo/semantics/nonPublished Sciences sociales Economie Industrial management -- Data processing Gestion d'entreprise -- Informatique Management information system (MIS) Information technology (IT) Electronic data intrechange (EDI) Système d’information comptable (AIS) Théorie contingente de la gestion c Organizational structure Contingency theory of AIS Under developed countries (UDC) Congo (Democratic Republic) Pays sous développé (PSD) Contingency theory of organization Structure organisationnelle Systemic structure Structure systémique Casual structure Structure causale Computer based accounting informat Accounting information system (AIS) Théorie de la contingence structurelle Système d’information de gestion Echange de données informatisées (E Technologie de l’information (TI)
174	Highway Development Decision-Making Under Uncertainty: Analysis, Critique and Advancement El-Khatib, Mayar January 2010 (has links) While decision-making under uncertainty is a major universal problem, its implications in the field of transportation systems are especially enormous; where the benefits of right decisions are tremendous, the consequences of wrong ones are potentially disastrous. In the realm of highway systems, decisions related to the highway configuration (number of lanes, right of way, etc.) need to incorporate both the traffic demand and land price uncertainties. In the literature, these uncertainties have generally been modeled using the Geometric Brownian Motion (GBM) process, which has been used extensively in modeling many other real life phenomena. But few scholars, including those who used the GBM in highway configuration decisions, have offered any rigorous justification for the use of this model. This thesis attempts to offer a detailed analysis of various aspects of transportation systems in relation to decision-making. It reveals some general insights as well as a new concept that extends the notion of opportunity cost to situations where wrong decisions could be made. Claiming deficiency of the GBM model, it also introduces a new formulation that utilizes a large and flexible parametric family of jump models (i.e., Lévy processes). To validate this claim, data related to traffic demand and land prices were collected and analyzed to reveal that their distributions, heavy-tailed and asymmetric, do not match well with the GBM model. As a remedy, this research used the Merton, Kou, and negative inverse Gaussian Lévy processes as possible alternatives. Though the results show indifference in relation to final decisions among the models, mathematically, they improve the precision of uncertainty models and the decision-making process. This furthers the quest for optimality in highway projects and beyond. highway development decision making under uncertainty real options jump processes infinitely divisible distributions Lévy processes measure theory characteristic function characteristic exponent Lévy jump measure probability measure cádlág stochastic process Wiener process Poisson process compound Poisson process finite activity models jump diffusion models Merton model Gaussian jump process Kou model double exponential jump process leptokurtic volatility smile infinite activity models pure jumps process generalized hyperbolic model modified Bessel function negative inverse Gaussian model geometric Brownian motion model log-normal distribution model normality assumption heavy-tailed distribution asymmetric distribution quantile-quantile plot Rydberg algorithm parameter calibration moments cummulants sum of squares Monte Carlo simulation least-squares regression backward dynamic programming discrete-time Markov chain land price traffic demand highway service quality index data collection traffic volume Annual Average Daily Traffic Ontario Ministry of Transportation Land Registry Office Freedom of Information Act seasonality value of transportation types of transportation systems importance of highway systems cost of wrong decisions monetary cost private sector cost human cost land expropriation environmental cost irreversibility cost factor time cost factor political cost factor opportunity cost opportunity cost of wrong decisions economic cost of wrong decisions economic cost of mis-estimation economic profit of wrong decisions cost of inaction price of making right decisions scope of decisions rehabilitation decision land acquisition decision expansion decision uncertainty modeling land acquisition cost expropriation cost construction cost material cost Montréal-Mirabel International Airport Pickering Airport 407 Express Toll Route Highway 407 Statistics
175	Highway Development Decision-Making Under Uncertainty: Analysis, Critique and Advancement El-Khatib, Mayar January 2010 (has links) While decision-making under uncertainty is a major universal problem, its implications in the field of transportation systems are especially enormous; where the benefits of right decisions are tremendous, the consequences of wrong ones are potentially disastrous. In the realm of highway systems, decisions related to the highway configuration (number of lanes, right of way, etc.) need to incorporate both the traffic demand and land price uncertainties. In the literature, these uncertainties have generally been modeled using the Geometric Brownian Motion (GBM) process, which has been used extensively in modeling many other real life phenomena. But few scholars, including those who used the GBM in highway configuration decisions, have offered any rigorous justification for the use of this model. This thesis attempts to offer a detailed analysis of various aspects of transportation systems in relation to decision-making. It reveals some general insights as well as a new concept that extends the notion of opportunity cost to situations where wrong decisions could be made. Claiming deficiency of the GBM model, it also introduces a new formulation that utilizes a large and flexible parametric family of jump models (i.e., Lévy processes). To validate this claim, data related to traffic demand and land prices were collected and analyzed to reveal that their distributions, heavy-tailed and asymmetric, do not match well with the GBM model. As a remedy, this research used the Merton, Kou, and negative inverse Gaussian Lévy processes as possible alternatives. Though the results show indifference in relation to final decisions among the models, mathematically, they improve the precision of uncertainty models and the decision-making process. This furthers the quest for optimality in highway projects and beyond. highway development decision making under uncertainty real options jump processes infinitely divisible distributions Lévy processes measure theory characteristic function characteristic exponent Lévy jump measure probability measure cádlág stochastic process Wiener process Poisson process compound Poisson process finite activity models jump diffusion models Merton model Gaussian jump process Kou model double exponential jump process leptokurtic volatility smile infinite activity models pure jumps process generalized hyperbolic model modified Bessel function negative inverse Gaussian model geometric Brownian motion model log-normal distribution model normality assumption heavy-tailed distribution asymmetric distribution quantile-quantile plot Rydberg algorithm parameter calibration moments cummulants sum of squares Monte Carlo simulation least-squares regression backward dynamic programming discrete-time Markov chain land price traffic demand highway service quality index data collection traffic volume Annual Average Daily Traffic Ontario Ministry of Transportation Land Registry Office Freedom of Information Act seasonality value of transportation types of transportation systems importance of highway systems cost of wrong decisions monetary cost private sector cost human cost land expropriation environmental cost irreversibility cost factor time cost factor political cost factor opportunity cost opportunity cost of wrong decisions economic cost of wrong decisions economic cost of mis-estimation economic profit of wrong decisions cost of inaction price of making right decisions scope of decisions rehabilitation decision land acquisition decision expansion decision uncertainty modeling land acquisition cost expropriation cost construction cost material cost Montréal-Mirabel International Airport Pickering Airport 407 Express Toll Route Highway 407 Statistics

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