Acceptance of Wearable Technology: A Meta-Analysis

Knowing what factors drive wearable technology adoption can help companies succeed in the competitive market of wearables. In this study, we conduct a meta-analysis on the relationships of technology acceptance of wearable technology based on the extant corpus (142 effect sizes from 44 samples collected in 11 countries). The results confirm the basic expectation that the core constructs of technology acceptance models as well as reveal that perceived enjoyment and usefulness are the most important to the adoption of wearables. However, more interestingly, a granular analysis of moderating effects shows that cultural factors including uncertainty avoidance, future orientation and humane orientation can significantly moderate the relationships between different determinants and wearable adoption. In addition, compared with other types of smart wearables, the users of smartwatches would place more weight on perceived self-expressiveness. These findings offer insights for future wearables-related research and also have practical implications for designing and developing successful wearable products

Financing Target and Product Line Design on the Flexible and Fixed Reward Crowdfunding

This study examined the product line design under two different types of reward crowdfunding, namely, the fixed and the flexible reward crowdfunding. To investigate different effects of the two different reward crowdfunding mechanisms, we addressed the problem of product and pricing decisions in reward crowdfunding by incorporating individual rationality and incentive compatibility into different funding modes. Specifically, when the creator designed the menu price, we compared the menu design, which includes price and quality between the product line under two different crowdfunding mechanisms. We found that when the quality was exogenous, the project could have higher success rate and get more expected profit under the fixed reward crowdfunding than that under the flexible reward crowdfunding; however, the creator could set a higher target and a larger price discrepancy under the flexible reward crowdfunding in some specific market condition. Then, we extended to the situation where the quality was endogenous and found the similar results as the quality was exogenous. Interestingly, the quality differentiation of the product line under the flexible reward crowdfunding is much more than that under the fixed reward crowdfunding. These results can provide the guideline and suggestion to help the creators design their product line, set the target, and select the suitable modes between the fixed and the flexible reward crowdfunding.publishedVersionPeer reviewe

Acceptance of Wearable Technology: A Meta-Analysis

publishedVersionPeer reviewe

Understanding the Role of User Interface for Multi-Criteria Decision-Making in Supporting Exploratory Usage of Information Systems

Multi-Criteria Decision-Making (MCDM) is one of the essential tasks people encounter in their everyday use of information systems. In MCDM, people weigh the relative importance of multiple decision criteria to assess decision candidates. Such an MCDM task is ubiquitous yet can be cognitively taxing without the explicit support of user interfaces (UIs). However, there has been a lack of approaches aiming at systemically understanding how the design of UIs can affect users' attitudes and behavior in performing their exploratory use of information systems under MCDM scenarios. To better understand the role of UIs in MCDM, we determine two factors in characterizing UI for MCDM; (1) the internal representation, the way that UI frames end-users in determining preferences of decision criteria (i.e., individual, proportional, and pairwise quantifies), and (2) the external representation, the way that UI externalizes user preferences while the users interact with systems (1D and 2D layouts). We conducted two studies to understand how different design choices affect users' MCDM processes. We found 2D layout improves a set of attitudinal aspects in MCDM scenarios while using different quantifiers introduces a set of trade-offs

Optimization of the Dechirper for Electron Bunches of Arbitrary Longitudinal Shapes

Dechirper is a passive device composed of a vacuum chamber of two corrugated, metallic plates with an adjustable gap. By introducing a small offset in the dechirper with respect to the reference axis, one might generate transverse wakefields and use the dechirper as a deflector. Understanding the interactions between electron beams of various longitudinal shapes with the wakefields generated by the dechirper is important to assess the feasibility of the dechirper for use as a deflector. Recently, using a set of alpha-BBO crystals, shaping of laser pulses and electron bunches on the order of ps is tested at the Injector Test Facility (ITF) of Pohang Accelerator Laboratory (PAL). Furthermore, we have investigated propagation of electron bunches of arbitrary longitudinal shapes through the dechirper. In the numerical simulations, we observed that the arbitrary electron beams were successful deflected except for lethal beam shape problems. Hence, in this work, we study optimization of the dechirper for electron bunches of arbitrary longitudinal shapes, using analytical theory and numerical simulations with the ASTRA and ELEGANT codes

A Low-Profile HF Meandered Dipole Antenna with a Ferrite-Loaded Artificial Magnetic Conductor

In this paper, a low-profile HF (high-frequency) meandered dipole antenna with a ferrite-loaded artificial magnetic conductor (AMC) is proposed. To operate in the HF band while retaining a compact size, ferrite with high permeability is applied to the unit cell of the AMC. The operating frequency bandwidth of the designed unit cell of the AMC is 1.89:1 (19–36 MHz). Thereafter, a meandered dipole antenna is designed by implementing a binary genetic algorithm and is combined with the AMC. The overall size of the designed antenna is 0.06×0.06×0.002 λ3 at the lowest operating frequency. The proposed dipole antenna with a ferrite-loaded AMC is fabricated and measured. The measured VSWR bandwidth (<3) covers 20–30 MHz on the HF band. To confirm the performance of the antenna, a reference monopole antenna which operates on the HF band was selected, and the measured receiving power is compared with the result of the proposed antenna with the AMC