A Search for Advertising Placement in Cyberspace: An Analytical Framework

Major commercial uses of the Web include providing customers with product information, promoting products, and conducting transactions (Balthazard and Koh, 1997a, 1997b; Ho, 1997; Koh and Balthazard, 1997a, 1997b). As a new communication medium, the Web requires a new mindset for its use in advertising and promotion. For example, Web marketers cannot rely upon previous research (Assael and Poltrack, 1994) or guidelines designed for choosing advertising placement in television based on using demographic profiles or purchase behavior. Today, although research has been done on Web advertising in general (Berthon, Pitt, and Watson, 1996a, 1996b; Briggs and Hollis, 1997; Ducoffe, 1996; Eighmey, 1997; Harvey, 1997; Kassaye, 1997; Maddox, Mehta, and Daubek, 1997), the issue of advertising placement on the Web has received scant attention from researchers

A Collaborative Framework for Collaborative Commerce

This article proposes a collaborative framework for the process of collaborative commerce (c-commerce) through which prospective partners could employ and configure c-commerce technologies according to the needs of different stages to realize potential benefits promised by the next generation of enterprise application software. This framework details pre-conditions that lead prospective partners to establish a collaborative relationship, including structural, social-psychological, and technological factors. This framework also describes how collaboration in c-commerce is unfolded following a teamwork problem-solving model. Furthermore, the framework discusses a variety of possible outcomes resulting from an initiative of collaborative commerce. Those components of collaborative commerce are structured in the format of the input-process-output model

Solving the Cold-Start Problem in Recommender Systems with Social Tags

In this paper, based on the user-tag-object tripartite graphs, we propose a recommendation algorithm, which considers social tags as an important role for information retrieval. Besides its low cost of computational time, the experiment results of two real-world data sets, \emph{Del.icio.us} and \emph{MovieLens}, show it can enhance the algorithmic accuracy and diversity. Especially, it can obtain more personalized recommendation results when users have diverse topics of tags. In addition, the numerical results on the dependence of algorithmic accuracy indicates that the proposed algorithm is particularly effective for small degree objects, which reminds us of the well-known \emph{cold-start} problem in recommender systems. Further empirical study shows that the proposed algorithm can significantly solve this problem in social tagging systems with heterogeneous object degree distributions

Planning and Deployment of Collaborative Commerce: A Conceptual Framework

This article proposes a conceptual framework for planning and deploying collaborative-commerce (c-commerce). The framework consists of two dimensions: the type of inter-organizational relationships and the level of engagement that involved organizations want to achieve. The combination of these two dimensions generates nine categories of collaborative-commerce. Each category designates an opportunity for c-commerce initiates. The article characterizes each category with two concepts: focus and linkage interface. Focus means the interest or benefits that one type of c-commerce is expected to achieve. Linkage interface refers to major elements that facilitate the type of c-commerce to move forward and keep the involved parties as a whole. Examples are identified to illustrate the nature of each category. Practitioners can use the framework as a roadmap to assess the commitment and trust level and subsequently, determine the type of c-commerce. Researchers can use the framework to identify issues specific to each category and specify features of enterprise application pertaining to each category. Three main directions are also identified for future research to further understand the phenomenon of c-commerce

DIVE in the cosmic web: voids with Delaunay Triangulation from discrete matter tracer distributions

We present a novel parameter-free cosmological void finder (\textsc{dive}, Delaunay TrIangulation Void findEr) based on Delaunay Triangulation (DT), which efficiently computes the empty spheres constrained by a discrete set of tracers. We define the spheres as DT voids, and describe their properties, including an universal density profile together with an intrinsic scatter. We apply this technique on 100 halo catalogues with volumes of 2.5\,$h^{-1}$Gpc side each, with a bias and number density similar to the BOSS CMASS Luminous Red Galaxies, performed with the \textsc{patchy} code. Our results show that there are two main species of DT voids, which can be characterised by the radius: they have different responses to halo redshift space distortions, to number density of tracers, and reside in different dark matter environments. Based on dynamical arguments using the tidal field tensor, we demonstrate that large DT voids are hosted in expanding regions, whereas the haloes used to construct them reside in collapsing ones. Our approach is therefore able to efficiently determine the troughs of the density field from galaxy surveys, and can be used to study their clustering. We further study the power spectra of DT voids, and find that the bias of the two populations are different, demonstrating that the small DT voids are essentially tracers of groups of haloes.Comment: 12 pages, 13 figure

A Terminal Sliding Mode Controller for Electric Spring

This paper mainly designs a terminal sliding mode controller (SMC) that can optimize the dynamic and static performance of the electric spring (ES) under the complex load environment on the user side, and improve the anti-interference ability of the ES. Firstly, the user-side ES-containing supply and distribution network (SDN) was modelled and analyzed, and then, the sliding surface and control rate was designed. Next, a reference voltage generation method was introduced, the stabilization conditions of the ES-containing SDN were identified, and the principles of parameter setting for the SMC were expounded. Finally, the proposed terminal SMC was proved feasible through simulations and dSPACE-based physical experiments and found to outperform the linear SMC in adaptability and dynamic and static performance