Search results for " EVALUATION"
showing 10 items of 1458 documents
DEA-like Models for the Efficiency Evaluation of Hierarchically Structured Units
2004
Abstract The knowledge of the internal structure of decision making units (DMUs) gives further insights with respect to the “black box” perspective when considering data envelopment analysis models. We present one-level and two-level hierarchical structures of the DMUs under evaluation. Each unit is composed of consecutive stages of parallel subunits all with constant returns to scale. In particular, the maximization of the relative efficiency of a DMU is studied. For the two-stage situation, different degrees of coordination among the subunits of the hierarchical levels are discussed. When some form of coordination has to be guaranteed, we introduce balancing constraints and we compare two…
Greedy versus Dynamic Channel Aggregation Strategy in CRNs: Markov Models and Performance Evaluation
2011
Part 1: - PE-CRN 2011 Workshop; International audience; In cognitive radio networks, channel aggregation techniques which aggregate several channels together as one channel have been proposed in many MAC protocols. In this paper, we consider elastic data traffic and spectrum adaptation for channel aggregation, and propose two new strategies named as Greedy and Dynamic respectively. The performance of channel aggregation represented by these strategies is evaluated using continuous time Markov chain models. Moreover, simulation results based on various traffic distributions are utilized in order to evaluate the validity and preciseness of the mathematical models.
Uncertainty Propagation in Integrated Urban Water Quality Modelling
2018
Sensitivity and uncertainty assessment of integrated urban drainage water quality models are crucial steps in the evaluation of the reliability of model results. Indeed, the assessment of the reliability of the results of complex water quality models is crucial in understanding their significance. In the case of integrated urban drainage water quality models, due to the fact that integrated approaches are basically a cascade of sub-models (simulating the sewer system, wastewater treatment plant and receiving water body), uncertainty produced in one sub-model propagates to the following ones in a manner dependent on the model structure, the estimation of parameters and the availability and u…
Direct evaluation of jumps for nonlinear systems under external and multiplicative impulses
2015
In this paper the problem of the response evaluation of nonlinear systems under multiplicative impulsive input is treated. Such systems exhibit a jump at each impulse occurrence, whose value cannot be predicted through the classical differential calculus. In this context here the correct jump evaluation of nonlinear systems is obtained in closed form for two general classes of nonlinear multiplicative functions. Analysis has been performed to show the different typical behaviors of the response, which in some cases could diverge or converge to zero instantaneously, depending on the amplitude of the Dirac's delta.
Improved Global-Local Method for Ultrasonic Guided Wave Scattering Predictions in Composite Waveguides and Defects
2023
Abstract As structures increase in complexity, in the use of high-performing materials and designs, their health assessment becomes increasingly challenging. Ultrasonic guided waves (UGWs) have shown to be very promising in the inspection of large (i.e. aerospace components) attenuating (i.e. composite materials) structures and have been successfully employed for damage detection in a variety of fields. The intrinsic complex nature of UGWs, due to their dispersive behavior, combined with the structural complexity of the applications, though, makes the interpretation of UGW inspections very challenging. Numerical simulations of UGW propagation become crucial to this end and have been address…
Assessment, Evaluation, and Research
2016
This chapter explores the best practices and resources for adopting assessment and evaluation strategies and practices across countries.
Case of Latvia in the Evaluation of Adult Education: Issues and Solutions
2015
<p><em>In the context of research the evaluation of adult education is analyzed as a process and outcome, emphasizing the evaluation of performance; goals are related to the assurance of quality and sustainability according to learners' needs; competence indicators are methodology, motivation, communication and management; evaluation involves self-evaluation, external evaluation and consolidation.</em></p><p><em>The goal of the article is to analyze the experience of adult educators in the field of evaluation. Methods - analysis of literature and interviews with Latvia’s education policy makers and implementers in AQUAD environment.</em></p>&l…
Developing Engineering Skills in Secondary Students Through STEM Project Based Learning
2020
The development of 21st century skills allows the training of competent students prepared for work and social life. The improvement of these skills, necessary for engineering students and future engineers, can be favored with training in Secondary Education Stage. Specifically, the Project-Based Learning (PBL) methodology includes the performance of different activities that allow the acquisition of both conceptual and procedural skills. This article describes the relationship between the skills that high school students develop when they work with PBL and the competences (ABET engineering skills) they acquire. In addition, an objective evaluation of the learning outcomes of 129 Secondary s…
Blisters and calluses from rowing : prevalence, perceptions and pain tolerance
2022
Background and Objectives: Rowing is a sport that involves constant gripping, pulling/pushing, and rotational movements of the hands, in a cyclic periodic manner with every stroke, with hundreds of strokes being taken within a short period of time. Dermatological issues on rowers’ hands (fingers and palms) in the form of blisters and calluses are common knowledge within the community, but their prevalence and the rower’s perceptions and pain tolerance to them has never been systematically evaluated. This work addresses these lacunae. Materials and Methods: Analysis of data collected from a survey on a sample of competitive (117) and noncompetitive rowers (28) who row on-water (total 145). R…
Teacher trainees' experiences of the components of ICT competencies and key factors in ICT competence development in work-based vocational teacher tr…
2022
International journal for research in vocational education and training 9 (2022) 2, S. 146-166