Temperature Regulation in Multicore Processors Using Adjustable-Gain Integral Controllers

This paper considers the problem of temperature regulation in multicore processors by dynamic voltage-frequency scaling. We propose a feedback law that is based on an integral controller with adjustable gain, designed for fast tracking convergence in the face of model uncertainties, time-varying plants, and tight computing-timing constraints. Moreover, unlike prior works we consider a nonlinear, time-varying plant model that trades off precision for simple and efficient on-line computations. Cycle-level, full system simulator implementation and evaluation illustrates fast and accurate tracking of given temperature reference values, and compares favorably with fixed-gain controllers.Comment: 8 pages, 6 figures, IEEE Conference on Control Applications 2015, Accepted Versio

Modelling the boundaries of project fast-tracking

Fast-tracking a project involves carrying out sequential activities in parallel, partially overriding their original order of precedence, to reduce the overall project duration. The current predominant mathematical models of fast-tracking are based on the concepts of activity sensitivity, evolution, dependency and, sometimes, information exchange uncertainty, and aim to determine optimum activity overlaps. However, these models require some subjective inputs from the scheduler and most of them neglect the merge event bias. In this paper, a stochastic model for schedule fast-tracking is proposed. Relevant findings highlight the existence of a pseudo-physical barrier that suggests that the possibility of shortening a schedule by more than a quarter of its original duration is highly unlikely. The explicit non-linear relationship between cost and overlap has also been quantified for the first time. Finally, manual calculations using the new model are compared with results from a Genetic Algorithm through a case study

Numbers do the majic-fast tracking the game

Car travel is no more a luxury now-a-days in India and it is now the choice of a common man.It has become a necessity and many jobs get done faster and easier by moving in cars. To cater to the needs of people who can spend extra money for transport, but at the time, buying a car is not possible for them call taxi service has become a great rescuing factor.There are many options of different call taxis to choose from. As far as Call Taxi services are concerned even though the service provider name is popular, easy to recollect and in the top of mind recall, most of the people especially first time users and occasional users do not remember or recollect the phone number of the call taxi operator when needed. With the tariff and services offered are more or less the same among all the operators retaining a customer is a Herculean task for the call taxi operators.There is little scope for diff erentiation and the operators try to off er customized services and short term promotions to the customers to att ract and avoid customer defection.The case can be analyzed fromthe following perspectives – New product launch, Market leader strategies, Services Marketing – Tangibilizing the intangibles, Advertisement message, Sales promotion techniques, Product Diff erentiation strategies

Demographic characteristics and opportunistic diseases associated with attrition during preparation for antiretroviral therapy in primary health centres in Kibera, Kenya.

Using routine data from HIV-positive adult patients eligible for antiretroviral therapy (ART), we report on routinely collected demographic characteristics and opportunistic diseases associated with pre-ART attrition (deaths and loss to follow-up). Among 2471 ART eligible patients, enrolled between January 2005 and November 2008, 446 (18%) were lost to attrition pre-ART. Adjusted risk factors significantly associated with pre-ART attrition included age <35 years (Odds Ratio, OR 1.4, 95% Confidence Interval, CI 1.1-1.8), severe malnutrition (OR 1.5, 95% CI 1.1-2.0), active pulmonary tuberculosis (OR 1.6, 95% CI 1.1-2.4), severe bacterial infections including severe bacterial pneumonia (OR 1.9, 95% CI 1.2-2.8) and prolonged unexplained fever (>1 month), (OR 2.6, 95% CI 1.3-5.2). This study highlights a number of clinical markers associated with pre-ART attrition that could serve as 'pointers' or screening tools to identify patients who merit fast-tracking onto ART and/or closer clinical attention and follow-up

Feedback MPC for Torque-Controlled Legged Robots

The computational power of mobile robots is currently insufficient to achieve torque level whole-body Model Predictive Control (MPC) at the update rates required for complex dynamic systems such as legged robots. This problem is commonly circumvented by using a fast tracking controller to compensate for model errors between updates. In this work, we show that the feedback policy from a Differential Dynamic Programming (DDP) based MPC algorithm is a viable alternative to bridge the gap between the low MPC update rate and the actuation command rate. We propose to augment the DDP approach with a relaxed barrier function to address inequality constraints arising from the friction cone. A frequency-dependent cost function is used to reduce the sensitivity to high-frequency model errors and actuator bandwidth limits. We demonstrate that our approach can find stable locomotion policies for the torque-controlled quadruped, ANYmal, both in simulation and on hardware.Comment: Paper accepted to IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS 2019

Punishing welfare : genealogies of child abuse

Official statistics on child protection in Australia suggest that child abuse is at crisis levels, providing a context for the most recent legislative and regulatory changes in child protection in Victoria; these promote community-managed services, voluntary care agreements, informal legal processes and fast-tracking of child intervention. This article sets out the rudiments of a genealogical account of the category of child abuse, placing the present events in the context of historical shifts in how the problem of child abuse is conceived and acted upon. It draws attention to new forms of power in relation to the policing of children and families, and their corresponding modes of subjectification that seek to fabricate individual responsibility for the underlying social arrangements surrounding children and families