We consider in a market model the cooperative emergence of value due to a positive feedback between perception of needs and demand. Here we consider also a negative feedback from production of the traded products, and find that this cooperativity is robust, provided that the production rate is slow. Cooperativity is found to be critically linked to the ability to minimize the overall need, and ...

AT first glance, money's growing influence in politics appears impossible to challenge because of a powerful positive-feedback loop. Yet hope remains. Although big-money donors are a diverse group, many of them want lower tax rates for themselves and less stringent regulations for their businesses — and they've been brilliantly effective in getting them. Their success has increased their income...

This paper models imperfect inspection policies for a system with a finite operational time requirement. Two types of maintenance policy are considered: that in which an alarm (a positive inspection) is followed by a check of the validity of the alarm at additional cost, and if the system is good it continues in service and if failed it is retired; and that in which a positive inspection leads ...

We study the reach control problem for affine systems on simplices, and the focus is on cases when it is known that the problem is not solvable by continuous state feedback. In previous work we used the reach control indices to construct a (discontinuous) piecewise affine control that solves the problem. Here we investigate the extent to which time-varying feedbacks can be used. A simple time-v...

Tutoring technologies for supporting learning from errors via negative feedback are highly developed and have proven their worth in empirical evaluations. However, observations of empirical tutoring dialogs highlight the importance of positive feedback in the practice of expert tutoring. We hypothesize that positive feedback works by reducing student uncertainty about tentative but correct prob...

Providing exploratory activities prior to instruction has been shown to facilitate learning. However, questions remain regarding the provision of guidance during the exploration phase. In this study, we replicated and extended a previous experiment by examining the effects of feedback during exploratory problem solving for children with varying levels of prior knowledge. Ninety-five children (M...

This paper analyses both global and regional approaches to solving problems of energy security and ecological imbalance by addressing specifically the problems of China’s energy security. China’s growing energy dependence has become a major concern for both economic and national security policymakers in that country. The ambitious goal of modernization of the economy along the lines of the othe...

Digital ventures seek to scale their user base quickly and effectively across markets in order to lock out competitors and drive adoption through positive feedback loops. We view such rapid global scaling as an organising logic by which ventures replicate a generic solution to recurring challenges, that are found in expanding a user base across markets; which is usually characterized by slight ...

The relationship between uncertainty and desire for feedback was investigated in 2 studies. Results of Study 1 showed support for a curvilinear relationship. People were interested in feedback at high and low levels of uncertainty, as opposed to moderate levels of uncertainty, indicating the activation of both uncertainty reduction and self-verification motives. In Study 2, the curvilinear rela...

Although the importance of health and exercising as a way to maintain fitness and physical wellbeing is widely recognized, it is often difficult for people to persist with a regular workout schedule. In this paper, we propose a solution to this problem through “Collaborative Digital Sports.” This is a digital sports environment where participants are given a shared goal. Through the use of body...