In this thesis we propose a multi-channel wireless network based on nodes that use multiple 802. 11 radio interfaces. The proposed system is singular, as it does not require new hardware or a new MAC, but instead leverages commodity 802. 11-based products. With this system, we target scenarios where the nodes are stationary and where their location can often be controlled. We evaluate the performance in this setup using an ad-hoc network approach whereby nodes generate as well as forward data. We also present and appraise a purely-wireless multi-channel infrastructure, which operates like the WLAN infrastructure-based networks in existence today, but without any fixed-line support. In such an infrastructure nodes dedicated for routing purposes provide wireless connectivity to users. We show that a multi-interface system provide significantly higher capacity in many scenarios. Our work puts forward various challenges, points to various anomalies in the operation of the 802. 11 MAC protocol, and shows the need to tackle unfairness issues. Our experiments demonstrate that the mere use of more dual-interface nodes does not necessarily create higher capacity. We also show that traffic differentiation significantly increases aggregate throughput in realistic scenarios. Finally, we provide an example of how simple channel-allocation algorithms in controlled random topologies can allow us to take advantage of a multi-interface system.

In this thesis we propose a multi-channel wireless network based on nodes that use multiple 802. 11 radio interfaces. The proposed system is singular, as it does not require new hardware or a new MAC, but instead leverages commodity 802. 11-based products. With this system, we target scenarios where the nodes are stationary and where their location can often be controlled. We evaluate the performance in this setup using an ad-hoc network approach whereby nodes generate as well as forward data. We also present and appraise a purely-wireless multi-channel infrastructure, which operates like the WLAN infrastructure-based networks in existence today, but without any fixed-line support. In such an infrastructure nodes dedicated for routing purposes provide wireless connectivity to users. We show that a multi-interface system provide significantly higher capacity in many scenarios. Our work puts forward various challenges, points to various anomalies in the operation of the 802. 11 MAC protocol, and shows the need to tackle unfairness issues. Our experiments demonstrate that the mere use of more dual-interface nodes does not necessarily create higher capacity. We also show that traffic differentiation significantly increases aggregate throughput in realistic scenarios. Finally, we provide an example of how simple channel-allocation algorithms in controlled random topologies can allow us to take advantage of a multi-interface system.

With the wireless mesh network in the embedded systems related applications booming in recent years, the demand of enhancing the overall end to end network traffic and ensuring a stable connection is growing. We proposed a Dynamic Multi-channel Multi-path Routing Protocol (DMMR Protocol) to decompose contending traffics over different channel, different time and different paths to enhance the end to end network traffic. Choosing channel dynamically according to the channel usage around node in the process of finding paths can avoid inter-flow and intra-flow channel competition. We tend to choose paths with less intersection nodes to reduce the probability of multiple paths are broken at same time when a single node cannot work. We can enhance end to end network traffic further by using multiple interfaces at one node. We use NS2 to test DMMR Protocol, and analyzing the overall end to end traffic when multiple connections are setting up in the network. If the network can accept a new connection, the increment of end to end traffic is same as the traffic of the new connection. In connection robust test, a single path broken will not affect other flows in same connection and the end to end traffic in the connection will recovery immediately when the broken path is repaired.

The rapidly intensifying adoption of the Internet channel for marketing and sales by incumbent bricks-and-mortar retailers underscores the importance of assessing the impact of the online channel strategies on firm performance in the dynamic competitive environment. At the time when store-based retailers increasingly dominate online sales the questions of when and how an incumbent retailer should adopt an online channel to achieve and sustain a competitive advantage are of utmost interest for both marketing scholars and practitioners. This dissertation investigates the role of two strategic decisions in affecting firm performance: (a) the order of adopting an online channel by incumbent retailers and (b) the degree of coordination between store and online sales channels. The resource-based view and the dynamic capabilities approach are used as theoretical foundations for the study. Following resource-based logic and applying a contingency perspective, this research proposes that firm-specific resource endowments determine the success of the order of online entry strategy for incumbent retailers. This dissertation utilizes the dynamic capabilities approach to propose that the strategy of inter-channel channel coordination leads to higher performance when core, unique dynamic capabilities pertaining to e-commerce are developed in-house, as opposed to being outsourced. By posing and answering the research questions regarding the role of strategic decisions of order of online entry and channel coordination in enhancing long-term financial and operational performance, this dissertation contributes to the development of strategic theory in the nascent areas of electronic commerce and multi-channel retailing, provides further empirical support to resource-based theory of competitive advantage, and assists managers in formulating more informed strategic objectives for achieving multi-channel competitive advantage.

The brand behind the garment is what gives the product popularity, relevance to the consumer, and overall profitability. As time passes, markets are becoming flooded with more brands that inherently provide the commodities. As a result, fashion marketers must put more time and investment into stipulating ways for which their brand can reach a select target consumer and enhance repeat purchase intentions with their competitive differentiations. As their efforts engage, an experiential perspective emerges in the fashion industry. By comparing fashion brands and their different distribution channels, the objectives of this study are to identify consumers’ perceptions of fashion brand experience dimensions and experience types, and to investigate the effect of brand experience dimensions and types on brand resonance. Upon extending Schmitt and Brakus, Schmitt, and Zarantonello’s experience dimensions and types, in conjunction with Keller’s brand resonance model, 12 out of 20 hypotheses confirm the significant impact of consumers experiences on brand resonance by analyzing the data (n = 374) from a university in the United States. Sensory and affective experiences are primary factors for establishing fashion brand association, while cognitive and relational driven experiences lead to establishing fashion brand loyalty. Sensory, affective, and relational experiences affect both product and store type experiences, while only product experience affects brand resonance. With the depiction of different brand effects, this study concludes that while Forever 21 may focus on relational experiences with the consumer, Gap utilizes positive cognitive experiences to develop a link to brand loyalty and fashion product reliability.

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This dissertation proposes a comprehensive solution to the problem of building device-independent (or multi-channel) user interfaces promoting the separation of the interface from the application logic. It introduces an interface model (Meta-Interface Model, or MIM) for separating the user interface from the application logic and the presentation device. MIM divides the interface into three components, presentation, interface, and logic, that are connected with abstract vocabularies designed in terms of user chosen abstraction. The logic component provides a canonical way for the user interface to communicate with an application. The presentation component provides a canonical way for the user interface to render itself independently of the platform. The interface component describes the interaction between the user and the application using a set of abstract parts, events, and method calls that are device and application independent. MIM goes one step further than earlier models and subdivides the interface into four additional subcomponents: structure, style, content, and behavior. The structure describes the organization of the parts in the interface, the style describes the presentation specific properties of each part, the content describes the information that is presented to the user, and the behavior describes user interaction with the interface in a platform-independent manner. This dissertation also presents the second version of the User Interface Markup Language (UIML2), a declarative language that derives its syntax from XML and realizes the MIM model. It also gives the design rationale behind the language and discusses the implementation issues for mapping UIML2 to various devices (Java/JFC, PalmOS, WML, HTML, and VoiceXML). Finally, this dissertation evaluates UIML2 in terms of its goals, and among the major ones are to provide a canonical format for describing interfaces that map to multiple devices and to generate one description of a user interface connection to the application logic independent of target device. / Ph. D.

The objective of this master's thesis is to analyse trends in distribution in the German market and evaluate their importance in the retail environment. The first chapter of the thesis deals with the issue of distribution from a theoretical perspective. Analysis of the German economy and retail environment serves as a basis for further elaboration of the thesis. In the German market is growing the importance of the e-commerce and there is a tendency of integration of distribution channels. The current situation and trends in distribution channels as well as the trends of the future are outlined on the basis of secondary data. The analysis is completed by qualitative research, which determines the potential use of current trends.