Uncertainty and previvors’ cancer risk management: understanding the decision-making process

Women who test positive for a BRCA genetic mutation, but who have not been diagnosed, or 'previvors,' experience intense, chronological risk-related uncertainty. Women’s risk management medical decisions can be a way to manage their uncertainty, but little is known about how uncertainty informs their decision or how uncertainty is impacted by these medical decisions. Using an uncertainty management theoretical lens, we interviewed 46 previvors about their decision-making process. A thematic analysis revealed two uncertainty management (i.e., risk-reducing) decision-making pathways (preventive surgery and increased surveillance) with each pathway encompassing a three-part process of 1) uncertainty appraisal, 2) medical decision (i.e., uncertainty management strategy), and 3) outcomes. The findings advance theoretical thinking about uncertainty and risk management as an ongoing, distressful chronic experience, and highlight the importance of life-span phenomena in women’s decision-making process. Based on the findings, we constructed a translational tool to aid genetic counselors and previvors facing these medical decisions.     

Predictors of Relationship Satisfaction in Online Romantic Relationships

Based on traditional theories of interpersonal relationship development and on the hyperpersonal communication theory, this study examined predictors of relationship satisfaction for individuals involved in online romantic relationships. One hundred-fourteen individuals (N = 114) involved in online romantic relationships, and who had only engaged in computer-mediated communication (CMC) with their partners, completed an online questionnaire about their relationships. Intimacy, trust, and communication satisfaction were found to be the strongest predictors of relationship satisfaction for individuals involved in online romances. Additionally, perceptions of relationship variables differed depending on relationship length and time spent communicating. Implications for interpersonal and hyperpersonal communication theories, and future investigation of online relationships, are discussed.     

The Effects of Communication Efficacy on Information-Seeking Following Events That Increase Uncertainty: A Cross-Lagged Panel Analysis

This study examined how past information-seeking experience influences individuals’ information-seeking decision process following an event that increases uncertainty in close relationships. To examine this issue, a two-wave, cross-lagged, panel-design study was conducted, and outcome expectancy, communication efficacy, and information-seeking were measured at each time. Analyses revealed that communication efficacy mediates the link between outcome expectancies and information-seeking under the conditions of uncertainty. The results also suggest that communication efficacy and information-seeking impact each other cyclically. The findings of this research suggest that scholars should focus on people's information-seeking experience and communication efficacy when examining information-seeking following events that increase uncertainty in close relationships.     

时变不确定时滞系统的最优保成本控制

针对一类同时具有状态时滞和输入时滞的时变不确定连续时滞系统,研究了保成本状态反馈控制器的设计,假定其中的时变不确定性项是范数有界的,但不需要满足匹配条件,通过构造改造的Lyapunov函数和线性矩阵不等式(LMI)方法.给出了系统满足保性能指标的一个充分条件,仅通过求解一个相应的线性矩阵不等式,就可得到保性能控制器使得闭环系统的一个保成本函数对所有允许的不确定参数有上界.通过求解凸优化问题得到最优保性能控制器,最后用示例说明了该方法的有效性.     

Responses to Jealousy Situations That Evoke Uncertainty in Married and Dating Relationships

This study examined jealousy situations among married versus dating relationships, the uncertainty jealousy induced, and communicative responses. Participants (N = 155) described situations, and analytic inductive procedures identified 9 jealousy situations. Comparisons indicate the Presence of Attractive Romantic Alternative and Choice of a Non-Romantic Other situations are most common among dating partners, whereas Choice of a Non-Romantic Other and Never Experienced Jealousy are most common among married couples. Dating partners experienced greater partner uncertainty following jealous situations. Situations differed in production of partner and relational uncertainty, satisfaction, and impact on other aspects of life.     

Environmental damage costs from fossil electricity generation in China, 2000-2003

Electricity consumption increases rapidly with the rapid development of China. The environmental damage costs of electricity generation are very important for both policy analysis and the proper management of the environment. A method was developed in this work to estimate gross environmental damage costs according to emission inventory and environmental cost factors, and to extend the costs from provincial to national level with population density. In this paper, sulfur dioxide (SO2), nitrogen oxides (NOx), particulate matter less than 10 μm in diameter (PM10), and carbon dioxide (CO2) from fossil fired power plants over 6000 kW were selected as index pollutants to quantify the environmental costs of damages on human health and global warming. With the new developed method, environmental damage costs, caused by 3 types of fired power plants in 30 provinces and 6 economic sectors during the years 2000 to 2003, were evaluated and analyzed. It can be seen that the calculated total national environmental damage costs of electricity have rapidly increased from 94930.87×106 USD in 2000 to about 141041.39×106 USD in 2003, with an average annual growth rate of 14.11%. Environmental damage costs of SO2, NOx, PM10, and CO2 are 69475.69×106, 30079.29×106, 28931.84×106, and 12554.57×106 USD and account for 49.26%, 21.33%, 20.51%, and 8.90% of total environmental costs in fossil electricity generation, respectively. With regard to regional distribution, external costs caused by fossil electricity generation are mainly concentrated in the more populated and industrialized areas of China, i.e., the Eastern Central and Southeastern areas.     

There is No Agony Like Bearing an Untold Story Inside You: Communication Research as Interventive Practice

Integrative interpersonal theory implies that relational uncertainty may play a role in the reassurance-seeking and negative feedback-seeking behavior of people with depressive symptoms. We sought to extend the theory by (a) documenting how individuals with depressive symptoms communicate under conditions of relational uncertainty, (b) evaluating actor and partner effects, and (c) utilizing observational measures of reassurance-seeking and negative feedback-seeking. Sixty-nine romantic couples engaged in 50 minutes of conversation rated by independent judges. Multilevel modeling results indicated that the depressive symptoms of actors and partners were the primary predictor of an actor's reassurance-seeking, but an actor's relational uncertainty was the primary predictor of an actor's negative feedback-seeking. The findings illuminate the interplay among depressive symptoms, relational uncertainty, and communication.     

改善烧结矿RDI指标的研究及应用

为了改善烧结矿的冶金性能,文章通过对烧结矿低温还原粉化机理的研究,从而提出了改善烧结矿RDI指标的可行性方法。通过适当提高烧结矿的碱度、在烧结矿中添加含硼物质以及采用低温烧结等方法,可获得较好的效果。     

Characterizing highly cited method and non-method papers using citation contexts: The role of uncertainty

The top 1000 biomedical papers by number of citations are classified by method, type of method and non-methods by examination of citation contexts. Supervised machine learning is applied to the context data for a training sample of papers which is then used to classify the full list, revealing that words indicating utility are most important for the classification of methods. Further word analysis is carried out using corpus linguistics to uncover context words that characterize non-methods. Hedging words are found to play an important role for non-methods, and several are selected for further analysis with logistic regression. Other variables in the regression are a consensus variable based on the similarity of contexts for a paper and another variable based on whether citations come from “methods” sections of citing papers. Accuracy of predictions from logistic regression is comparable to machine learning. The results are interpreted in terms of the perceived certainty or uncertainty of the underlying knowledge, that is, methods and their outputs have higher certainty, and non-methods higher uncertainty. Evidence is found that hedging is inversely related to citation frequency. Implications of this work for the study of the development of science and the role of methods and tools in biomedical research are discussed.