Understanding sustained usage of health and fitness apps: Incorporating the technology acceptance model with the investment model

With the increasing popularity and adoption of health/fitness apps, more research attention is needed to examine users' behavior in order to promote sustained usage of the apps. The purpose of this study is to understand health and fitness app users' decision-making process by integrating the Technology Acceptance Model (TAM) and the Investment Model (IM). Three hundred forty-six responses were collected from health and fitness app users in China. A confirmatory factor analysis and a structural equation modeling analysis were conducted. Results show that continuance intention to use the apps is significantly affected by constructs included in the two models. Specifically, perceived ease of use of the apps has a positive effect on perceived usefulness, which further affects users' intention to continue using the apps. In addition, perceived usefulness and perceived ease of use of the apps have significant effects on users' satisfaction, investment size, and quality of available alternatives, and these three constructs affect users' relationship commitment to the apps, which, in turn, influences users' continuing intention. The integrated model provides new insights into the app users' decision-making process and suggests practical implications for app providers, such as developing strategies to evoke and maintain users’ interest in their apps, keeping users satisfied by personalizing their experience, and designing features that keep users invested in the apps.     

A Multifaceted Tool for a Complex Phenomenon: Coding Web‐Based Interactivity as Technologies for Interaction Evolve

Analysis of interactivity in Web sites is an important extension of a long tradition of analyzing content of media messages. But both interactivity and online analysis of content and features offer unique challenges to researchers. This study develops and tests a tool for measuring interactivity in the context of health‐related Web sites. The tool was flexible enough to distinguish among multiple types of interactivity and powerful enough to show differences in interactivity based on domain type. Thus, it should have a relatively long life as a multifaceted tool for the tough job of measuring interactivity online.     

施工阶段工程造价管理

对签订公平合理的合同应注意的问题进行了阐述，并从工程量的统计工作、工程实施中的索赔工作、造价管理系统的良好建立等方面对工程施工期间的全方位管理进行了论述，最后对直接费控制进行了探讨。     

多事件干扰下的索赔计算方法

针对多事件交叉干扰下工期延误引起的工期索赔责任归属难以判断和责任比例难以测量的问题,提出一种程序化计算方法,即通过设置一系列易于嵌入计算机程序的变量,无需进行关键路线的分析,即可对各工序对于工期延误造成的影响进行较为精确的分析和排序。     

桩基工程地下障碍物费用和工期索赔的处理

结合工程实例,介绍了桩基工程地下障碍物费用和工期索赔的处理依据和处理方案,对基础桩施工费用补偿和施工工期顺延天数进行了计算分析,指出这种索赔处理合理,既利于工程,又加快了后续施工进度。     

Conventional and toxicogenomic assessment of the acute pulmonary damage induced by the instillation of Cardiff PM10 into the rat lung

There is strong epidemiological evidence of association between PM₁₀ (particulate matter with an aerodynamic diameter less than or equal to 10 μm) and adverse health outcomes including death and increased hospital admissions for cardiopulmonary conditions. Ambient PM₁₀ surrogates such as diesel exhaust particles (DEP), a common component of UK PM_10, have been shown to induce lung inflammation in both humans and rodents. To date, few studies have reported on the toxicological response of UK PM₁₀ in experimental animals.This study examines the pulmonary toxicological responses in male Sprague Dawley rats following the intratracheal instillation of Cardiff urban PM₁₀. A mild but significant change in lung permeability was observed in the lung post-instillation of a high (10 mg) dose of the whole PM₁₀ as adjudged by increases in lung to body weight ratio and total acellular lavage protein. Such effects were less marked following instillation of a water-soluble fraction (80% of the total mass) but histological examination showed that lung capillaries were swollen in size with this treatment.In conclusion, conventional toxicological, histological and toxicogenomic studies have indicated that Cardiff PM₁₀ exhibits low bioreactivity in the form of mild permeability changes. Differential gene expression was observed when the lung was treated with whole PM₁₀, containing durable particles, in comparison with the water-soluble fraction of PM₁₀ that was devoid of particles. Such changes were linked to different histopathological events within the lung.     

浅谈项目索赔管理

分析了项目合同执行过程中导致承包商提出索赔的原因,详细地介绍了索赔处理的程序,对索赔的计算进行了深入探讨,以处理好工程施工过程中的索赔问题,从而为工程顺利实施创造条件.     

承包商如何做好工程变更

由于工程项目自身的特点、自然环境和地质环境的复杂性以及勘察设计工作者在设计过程中不可能预计到施工期间的突发情况,这些就使得工程建设过程中不可避免地发生工程变更。承包商在投标报价时以及工程实施过程中要能够合理地运用工程变更策略,尽量不以索赔而以签证的方式处理问题,这既有利于承包商得到期望中的利益,又有利于业主和承包商创建一个友好和谐的合作氛围,使工程顺利完成。     

飞机健康管理系统的验证与确认

本文研究了飞机健康管理(AHM)系统的验证与确认(V&V)所面临的挑战和受影响因素.首先研究了商用飞机的航空电子设备以及软件系统的V&V,然后分析了AHM系统的验证与确认所面临的挑战.     

Favoring plant instead of animal protein sources: Legitimation by authority,morality, rationality and story logic

A shift to a more healthy and sustainable diet (as recommended by the EAT Lancet Commission report) is currently hampered by persistent choices for meat, which are based on stable preferences and positive feedback mechanisms at the individual, social, and economic/organizational level. This paper puts forward the view that proposals for a diet shift will fall short without broad social legitimation, aimed at a change in social norms. That what previously belonged to the domain of morally acceptable practices (eating animal protein sources) has to be strongly limited, whereas what was previously not considered particularly noteworthy (eating plant protein sources) should become an accepted and, subsequently, a preferable alternative. This process of reordering has been set into motion by a typically expert-based legitimation, but the pace of its progress will depend on many other forces operating throughout society. Building on van Leeuwen’s framework of persuasive strategies, this conceptual review paper aims to improve understanding of the various categories of legitimation, related to authority, moral evaluation, rationality, and story logic. Each category is examined with a view to how it may support (or oppose) the reordering of protein sources necessary for a diet shift. Key strategies are a further revision of the existing authority-based dietary guidelines, using the diversity of rationality-based legitimations to support them, avoiding polarization of moral-based ideologies and being cautious of myths, micro-myths and stories.