Building Relationship Between the Management Information Systems Area and Other Academic Disciplines: An Introduction

Relatively speaking, the field of information systems is still young, developing into a coherent field. This introduction to the minitrack is organized into the following four sections. The first section discusses three prerequisite conditions for MIS to become a coherent field of a study, as suggested by Keen (1980). 1.1 Clarifying reference disciplines 1.2 Building a cumulative research tradition 1.3 Defining the dependent variables The second section is concerned with the process by which an academic discipline becomes establishment. Once the prerequisite conditions for becoming a classic field of study have been met, a review of the major works of Kuhn (1970), Kaplan (1964), and Cushing (1990) describes the process by which an academic discipline becomes establishment in terms of the following steps: 2.1 Consensus building 2.2 Empirical studies 2.3 Articulation of Theories 2.4 Paradigm Building The third section overviews the current state of MIS research in terms of the prerequisite conditions and the process as described above. The last section reaches several conclusions and suggests some future research directions

Author Cocitation Analysis Using Custom Bibliographic Databases: An Exploratory Tool for Digging Up Reference Disciplines

Researchers in any academic discipline build on each other\u27s and their own previous work. Definitions, topics and concepts are shared. It is necessary to continuously follow up on interesting lines of inquiry. It is also necessary to identify, examine, and trace the intellectual linkage to each other in a given academic field as a basis of assessing the current state of its field to guide future development. Over the past 80 years, the way we count and analyze the intellectual linkage dramatically changed from the early manual transcribing and statistical computation of citation data to computer-based citation data creation and its manipulation. Most citation and cocitation analyses rely on commercial citation databases such as Social Science Citation Index. This paper introduces an alternative approach to conducting author cocitation analysis (ACA) without relying on commercial citation databases, based on custom bibliographic database and cocitation matrix generation systems specifically developed to use the custom database. The alternative approach overcomes several weaknesses of commercial online data-based ACA research. This guide to an alternative approach to ACA will encourage other researchers to explore the intellectual structures of various MIS fields and guide the future development as well as revealing their reference disciplines

Thickness dependent magnetotransport in ultra-thin manganite films

To understand the near-interface magnetism in manganites, uniform, ultra-thin films of La_{0.67}Sr_{0.33}MnO_3 were grown epitaxially on single crystal (001) LaAlO_3 and (110) NdGaO_3 substrates. The temperature and magnetic field dependent film resistance is used to probe the film's structural and magnetic properties. A surface and/or interface related dead-layer is inferred from the thickness dependent resistance and magnetoresistance. The total thickness of the dead layer is estimated to be $\sim 30 \AA$ for films on NdGaO_3 and $\sim 50 \AA$ for films on LaAlO_3.Comment: 11 pages, 4 figure

Positive exchange bias in ferromagnetic La0.67Sr0.33MnO3 / SrRuO3 bilayers

Epitaxial La0.67Sr0.33MnO3 (LSMO)/ SrRuO3 (SRO) ferromagnetic bilayers have been grown on (001) SrTiO3 (STO) substrates by pulsed laser deposition with atomic layer control. We observe a shift in the magnetic hysteresis loop of the LSMO layer in the same direction as the applied biasing field (positive exchange bias). The effect is not present above the Curie temperature of the SRO layer (), and its magnitude increases rapidly as the temperature is lowered below . The direction of the shift is consistent with an antiferromagnetic exchange coupling between the ferromagnetic LSMO layer and the ferromagnetic SRO layer. We propose that atomic layer charge transfer modifies the electronic state at the interface, resulting in the observed antiferromagnetic interfacial exchange coupling.Comment: accepted to Applied Physics Letter

Inhibitors of neomycin phosphotransferase II enzyme-linked immunosorbent assay in grapevine (Vitis vinifera L.) leaves

Grapevine tissue extracts are rich in compounds that may inhibit detection and/or extraction of protein, DNA, and RNA. One such example can be found in the use of enzyme-linked immunosorbent assays (ELISA) to detect neomycin phosphotransferase II (NPTII) in leaf tissue. The objective of this study was to identify grape leaf components that interfere with protein detection via ELISA. A series of compounds were identified, and tartaric and ellagic acids were most inhibitory to NPTII detection. Polyphenolics as well as the low pH of grape leaf extracts also reduced the effectiveness of ELISA detection

Localization of Two-dimensional Electron Gas in LaAlO3/SrTiO3 Heterostructures

We report strong localization of 2D electron gas in LaAlO3 / SrTiO3 epitaxial thin-film heterostructures grown on (LaAlO3)0.3-(Sr2AlTaO3)0.7 substrates by using pulsed laser deposition with in-situ reflection high-energy electron diffraction. Using longitudinal and transverse magnetotransport measurements, we have determined that disorder at the interface influences the conduction behavior, and that increasing the carrier concentration by growing at lower oxygen partial pressure changes the conduction from strongly localized at low carrier concentration to metallic at higher carrier concentration, with indications of weak localization. We interpret this behavior in terms of a changing occupation of Ti 3d bands near the interface, each with a different spatial extent and susceptibility to localization by disorder, and differences in carrier confinement due to misfit strain and point defects.Comment: 12 pages, 4 figure

Coexistence of superconductivity and ferromagnetism in two dimensions

Ferromagnetism is usually considered to be incompatible with conventional superconductivity, as it destroys the singlet correlations responsible for the pairing interaction. Superconductivity and ferromagnetism are known to coexist in only a few bulk rare-earth materials. Here we report evidence for their coexistence in a two-dimensional system: the interface between two bulk insulators, LaAlO$_3$ (LAO) and SrTiO$_3$ (STO), a system that has been studied intensively recently. Magnetoresistance, Hall and electric-field dependence measurements suggest that there are two distinct bands of charge carriers that contribute to the interface conductivity. The sensitivity of properties of the interface to an electric field make this a fascinating system for the study of the interplay between superconductivity and magnetism.Comment: 4 pages, 4 figure