An Innovation Resistance Perspective on Seller Resistance to Digital Device Recycling Platforms

Digital device recycling platforms (DDRP), popularized by the resale commerce (reCommerce) movement, allows users to sell, trade-in, and recycle used digital devices online. Although DDRPs offer new opportunities for commerce and sustainability, challenges exist to usher in their wide adoption. This study aims to develop a deeper understanding of the reasons underlying seller resistance to the DDRP that is grounded in the innovation resistance theory (IRT). The research model of this study is validated using data collected from 307 potential sellers of used digital devices

How to Keep Brand Fan Page Followers? The Lens of Person Environment Fit Theory

Companies create brand fan pages (BFPs) on social media platforms to broadcast product information, increase brand awareness, and engage customers. A common issue facing BFPs is how to attract and retain followers. When examining this issue, previous research has mostly explored the antecedents of individual’s initial follow or acceptance behavior towards BFPs, without considering the post “follow” stage of BFPs fans. To address this research gap, we develop and validate a theoretical model to explain the antecedents of fans’ continued intention to follow BFPs. Our model is grounded in the theory of person-environment fit (TPEF) to understand how multidimensional fit perceptions play an important role in fans’ continued intention to follow. Data will be collected from active followers of BFPs on Facebook, the most prevalent social media platform in the world, to test the proposed model. Partial least squares method will be employed to assess the relationships in the model

Inversion of Shear Wave Anisotropic Parameters in Strongly Anisotropic Formations

Deepwater reservoirs use highly deviated wells to reduce cost and enhance hydrocarbon recovery. Due to the strong anisotropic nature of many of the marine sediments, anisotropic seismic imaging and interpretation can improve reservoir characterization. Sonic logs acquired in these wells are strongly dependent on well deviations. Cross-dipole sonic logging provides apparent shear wave anisotropy in deviated wells, which can be far from the truth. Although anisotropic parameters have been successfully obtained using data from wells of several deviations or using single well data based on weak anisotropy approximation, estimation of strong shear wave anisotropy from single well data remains a challenge. Using sensitivity analysis, we find Stoneley wave velocity has good sensitivity to qSV and SH wave velocities in deviated wells. We create a linear inversion scheme to estimate shear wave anisotropy using SH, SV, and Stoneley wave velocities logged in one well. We first apply the method to laboratory measurements from boreholes of various deviations relative to the symmetry axis of an anisotropic material. We then apply the method to a field data set acquired in a deviated well. We also compute the vertical and horizontal shear wave velocity logs in this well using the inverted elastic shear wave constants.Massachusetts Institute of Technology. Earth Resources Laborator

Exploring Users’ Security-related Fact-Checking Behavior in Educational Social Media Groups: The Perspective of Health Belief Model

Social media services have become increasingly prevalent among educators as a means to enhance their educational effectiveness. The group feature in these services, which allows multiple users to communicate within a shared space, has been extensively incorporated into the teaching process. Unfortunately, information security threats and risks have appeared along with the popularity of educational social media groups. In this study, we are conducting exploratory research to investigate the antecedents of users’ security-related fact-checking behavior in teacher-parent social media groups based on the health belief model. A cross-sectional survey will be conducted to test our proposed research model and the data will be collected from WeChat users. We are expecting to make several contributions to the current literature on educational social media usage and behavioral information security

Radiation Patterns Of Compressional And Shear Transducers At The Surface Of An Elastic Half Space

The radiation patterns of an elastic wave field generated by circular plane compressional and shear transducers are derived using the method of steepest descent. These patterns contain both effects of the elastic half space and the amplitude modulation due to the finite dimension of the piston source. Behaviors of radiation patterns of the generated compressional and shear waves are shown for low, medium, and high frequencies. Laboratory experiments have been performed to measure radiation patterns of compressional and shear transducers. Theory and experiment are found to be in good agreement.New England Research, Inc.Massachusetts Institute of Technology. Borehole Acoustics and Logging Consortiu

Low Temperature Oxidation Experiments and Kinetics Model of Heavy Oil

Air injection is an effective technique for improved oil recovery. For a typical heavy oil sample, the effects of temperature on the oxidation characteristics were studied by low temperature oxidation (LTO) experiments. Kinetic parameters such as activation energy, frequency factor (pre-exponential factor) and reaction order are determined by using Arrhenius Equation. These parameters provide a theoretical basis for numerical simulation of LTO taking place during air injection in heavy oil reservoirs. The results of LTO experiments show that heavy oil has good low temperature oxidation properties and LTO reaction rate is mainly related to temperature, oxygen partial pressure and properties of crude oil. In the experimental temperature range, the oxidation reaction can effectively consume oxygen and at the same time produce large amount of CO2.Key words: Air injection; Low temperature oxidation; Kinetics model (70-150 oC

Borehole Stoneley Wave Propagation Across Permeable Structures: Comparison Between Theory And Experiment

The attenuation of borehole Stoneley waves across a permeable structure (e.g., fractures or fracture zone) is correlated with the permeability of the structure. Using a simplified Biot theory, the structure can be modelled as a permeable porous layer intersecting the borehole. In order to study the effect of such a structure on Stoneley waves and to evaluate the theoretical model, we performed laboratory experiments using ultrasonic borehole models. The porous layer model is made of fine-grained sands with high permeability and porosity. The experiments are carried out with three saturant fluids: water, alcohol, and glycerol. The iso-offset Stoneley waveforms are recorded by moving the source and receiver across the porous layer. In this way, robust estimates of Stoneley wave transmission coefficients are obtained. The experimental transmission coefficients are compared with the theoretical coefficients calculated using the borehole and permeable zone parameters. There is good agreement between theoretical results and experimental results. For low viscosity fluid water and ethyl alcohol, the agreement is very good. For high viscosity fluid, glycerol, the agreement is fair with the experimental Stoneley attenuation higher than the theoretical value.Massachusetts Institute of Technology. Borehole Acoustics and Logging ConsortiumUnited States. Dept. of Energy (Grant DE-FG02-86ER13636

A dynamic database of microarray-characterized cell lines with various cytogenetic and genomic backgrounds

The Human Genetic Cell Repository sponsored by the National Institute of General Medical Sciences (NIGMS) contains more than 11,000 cell lines and DNA samples collected from numerous individuals. All of these cell lines and DNA samples are categorized into several collections representing a variety of disease states, chromosomal abnormalities, heritable diseases, distinct human populations, and apparently healthy individuals. Many of these cell lines have previously been studied with detailed conventional cytogenetic analyses, including G-banded karyotyping and fluorescence in situ hybridization. This work was conducted by investigators at submitting institutions and scientists at Coriell Institute for Medical Research, where the NIGMS Repository is hosted. Recently, approximately 900 cell lines, mostly chosen from the Chromosomal Aberrations and Heritable Diseases collections, have been further characterized in detail at the Coriell Institute using the Affymetrix Genome-Wide Human SNP Array 6.0 to detect copy number variations and copy number neutral loss of heterozygosity. A database containing detailed cytogenetic and genomic information for these cell lines has been constructed and is freely available through several sources, such as the NIGMS Repository website and the University of California at Santa Cruz Genome Browser. As additional cell lines are analyzed and subsequently added into it, the database will be maintained dynamically

Secure Communication Scheme Based on Asymptotic Model of Deterministic Randomness

We propose a new cryptosystem by combing the Lissajous map, which is the asymptotic model of deterministic randomness, with the one-way coupled map lattice (OCML) system. The key space, the encryption efficiency, and the security are investigated. We find that the parameter sensitivity can reach the computational precision when the system size is only three, all the lattice outputs can be treated as key stream parallelly, and the system is resistible against various attacks including the differential-like chosen cipher attack. The findings of this paper are a strong indication of the importance of deterministic randomness in secure communications.Comment: 16 pages, 7 figure