Multiple Voltage and Frequency Scheduling for Power Minimization

The design description for an integrated circuit may be described in terms of three domains, namely: (1) behavioral domain, (2) structural domain and (3) physical domain. These domains may be hierarchically divided into several levels of abstraction. Classically, these level of abstraction are (1) Architectural or Functional level, (2) Register-transfer level, (3) Logic level and (4) Circuit level. Some of the design problems associated with VLSI circuit design are area, speed, reliability and power consumption. With the development of portable devices, power consumption has become a dominant design consideration in the modern VLSI design area. In each of these domains there are a number of design challenges to reduce power. For instance, at the behavioral level, the freedom to choose multiple voltages and frequencies to minimize power to meet the given hard time constraints is considered as an active field of research to minimize power. Various past researches have showed that higher the level of abstraction, better the ability to address the problems associated with the design. Therefore this work proposes an algorithm that allocates both voltage and frequency simultaneously to the operations of the directed flow graph to optimize power given the time constraints. The resources required for multiple voltage-frequency scheduling is derived using the classical force directed scheduling algorithm. This algorithm has been implemented and tested on High-Level synthesis benchmarks for both non-pipelined and pipeline instances

The perspectives of learners at a public medical school on the evaluation of an online learning management system for degree and non-degree courses

ABSTRACTBackground There has been a rapid development and adoption of online learning in medical education. However, it is difficult to adopt the currently available online learning management systems (LMS). This study aimed to examine learners’ perspectives on the evaluation of online LMS.Methods An online LMS was developed based on the evidence-based guidelines. Two cross-sectional studies were conducted. A short survey was conducted with 716 learners registered on the LMS to obtain their perspectives on the online participation. A satisfaction survey was conducted with 255 learners enrolled in the courses taught solely online. Data from the LMS monitoring system was used to report the uptake of online courses. Data were analyzed using descriptive statistics.Results Participants reported that the major factor influencing LMS uptake was the ability to be accessed anytime and anywhere (n = 556, 77.7%). The participants had good experience in using the LMS and were satisfied with it (n = 255, mean = 4.53, SD = 0.62). For online degree courses, the course had a high completion rate of 90% provided that a mark was assigned for course attendance. For non-degree courses, irrespective of whether they were free, paid, exam-based, or participation only, the completion rate was considered low (range 4.3–36.7%).Conclusion Under a limited budget, a medical school in a low- to middle-income country could develop an effective online LMS to meet learners’ needs. Our newly developed online LMS is relevant, accepted and to the satisfaction of the learners. Medical schools in the same context are encouraged to develop their own online LMS that serve and support learning in both degree and non-degree courses

Sporadic Burkitt Lymphoma Presenting as Acute Pancreatitis, Concurrent Sinusitis, and Enlarged Adenoids

Pancreatitis and sinusitis as presentations of Burkitt lymphoma are uncommon and rarely described in children. We describe here the case of a child who presented with symptoms suggestive of sinusitis unresponsive to antibiotics, with subsequent development of abdominal symptoms due to pancreatitis. He was eventually diagnosed with Burkitt lymphoma

Banach fixed-point theorem in semilinear controllability problems – a survey

The main aim of this article is to review the existing state of art concerning the complete controllability of semilinear dynamical systems. The study focus on obtaining the sufficient conditions for the complete controllability for various systems using the Banach fixedpoint theorem. We describe the results for stochastic semilinear functional integro-differential system, stochastic partial differential equations with finite delays, semilinear functional equations, a stochastic semilinear system, a impulsive stochastic integro-differential system, semilinear stochastic impulsive systems, an impulsive neutral functional evolution integro-differential system and a nonlinear stochastic neutral impulsive system. Finally, two examples are presented