Search results for "Computer"
showing 10 items of 30657 documents
Prioritizing covariates in the planning of future studies in the meta-analytic framework
2016
Science can be seen as a sequential process where each new study augments evidence to the existing knowledge. To have the best prospects to make an impact in this process, a new study should be designed optimally taking into account the previous studies and other prior information. We propose a formal approach for the covariate prioritization, i.e., the decision about the covariates to be measured in a new study. The decision criteria can be based on conditional power, change of the p-value, change in lower confidence limit, Kullback-Leibler divergence, Bayes factors, Bayesian false discovery rate or difference between prior and posterior expectation. The criteria can be also used for decis…
Energie informatique et choix de matériel
1995
The choice of computers been made according to a minimax: one chooses the most powerful computer in the less powerful category. We show here that, in a simple case, if one takes into account the time of equipment utilization, this rule can be given in cause. We study then a case more complicated including some technical parameters like the case of multiprocessor machine and including other human parameters like the intensity of task submission.
Towards student-centred pedagogy : action research with Ethiopian village school teachers
2018
This study is an action research that was planned and implemented with 23 Ethiopian Village School teachers. The action of the four year project concentrated on developing new, student-centred teaching methods instead of traditional lecturing and rote learning in one remote school. The overall aim of the study was to follow this process and the teachers’ professional development, and to explore how the practical arrangements, such as material or cultural surroundings, constrain or enable usage of student-centred methods at the school. The theoretical framework of the study consists of theories about professional development, action research, and the theory of practice architectures. The dat…
Design principles of educational virtual worlds for preschool children : a case study of JumpStart World Kindergarten's pedagogical methods
2010
This thesis studies the design principles of educational virtual worlds for pre-school children. It examines the culture and contextualization of the virtual worlds for children used for the purpose of informal education through learning games in the case study of JumpStart World Kindergarten. The theoretical background provides an overview of the historical development of educational virtual worlds based on the progression of MUDs, MOOs and MMORPG. In addition, the issues in implementation and adaptation of information and communication technologies (ICT) as part of educational methodologies are examined, thus a perspective is given of possible problems and solutions for optimization of us…
Combining hyperspectral UAV and multispectral Formosat-2 imagery for precision agriculture applications
2014
Remote sensing is a key tool for precision agriculture applications as it is capable of capturing spatial and temporal variations in crop status. However, satellites often have an inadequate spatial resolution for precision agriculture applications. High-resolution Unmanned Aerial Vehicles (UAV) imagery can be obtained at flexible dates, but operational costs may limit the collection frequency. The current study utilizes data fusion to create a dataset which benefits from the temporal resolution of Formosat-2 imagery and the spatial resolution of UAV imagery with the purpose of monitoring crop growth in a potato field. The correlation of the Weighted Difference Vegetation Index (WDVI) from …
Unfair play? Video games as exploitative monetized services: An examination of game patents from a consumer protection perspective
2019
Video games as a consumer product have changed significantly with the advent of in-game purchasing systems (e.g., microtransactions, ‘loot boxes’). This review examines consumer protections related to in-game purchasing by anticipating some of the potential design strategies that might contribute to higher risk consumer behavior. Attention was directed towards the analysis of patents for potential in-game purchasing systems, with 13 identified on Google Patents. The design features were analysed in relation to the consumer rights and guarantees described in the terms of use agreements of the patent assignees. The analysis revealed that some in-game purchasing systems could be characterized …
Interactively Learning the Preferences of a Decision Maker in Multi-objective Optimization Utilizing Belief-rules
2020
Many real life problems can be modelled as multiobjective optimization problems. Such problems often consist of multiple conflicting objectives to be optimized simultaneously. Multiple optimal solutions exist to these problems, and a single solution cannot be said to be the best without preferences given by a domain expert. Preferences can be used to find satisfying solutions: optimal solutions, which best match the expert’s preferences. To model the preferences of the expert, and aid him/her in finding satisfying solutions, a novel method is proposed. The method utilizes machine learning combined with belief-rule based systems to adaptively train a belief rule based system to learn a domai…
Numerical and Experimental Study of a Novel Concept for Hydraulically Controlled Negative Loads
2016
This paper presents a numerical and experimental investigation of a novel concept that eliminates oscillations in hydraulic systems containing a counterbalance valve in series with a pressure compensated flow supply. The concept utilizes a secondary circuit where a low-pass filtered value of the load pressure is generated and fed back to the compensator of the flow supply valve. The novel concept has been implemented on a single boom actuated by a cylinder. A nonlinear model of the system has been developed and an experimental verification shows good correspondence between the model and the real system. The model is used for a parameter study on the novel concept. From the study it is found…
Hard to catch: Experimental evidence supports evasive mimicry
2021
Most research on aposematism has focused on chemically defended prey, but the signalling difficulty of capture remains poorly explored. Similar to classical Batesian and Müllerian mimicry related to distastefulness, such ‘evasive aposematism' may also lead to convergence in warning colours, known as evasive mimicry. A prime candidate group for evasive mimicry areAdelphabutterflies, which are agile insects and show remarkable colour pattern convergence. We tested the ability of naive blue tits to learn to avoid and generalizeAdelphawing patterns associated with the difficulty of capture and compared their response to that of birds that learned to associate the same wing patterns with distast…
The role of the principal's instructional leadership at schools in Indonesia
2016
The education system in Indonesia, based on Ministry of National Education, has been performing instructional leadership as a major part of the effective school leaders’ behavior. One of the goals of instructional leadership implementation is to increase the learning outcomes of students. However, many of international student assessments have shown that Indonesia’s education system was among the incompetent countries. The purpose of the study is to analyze the implementation of instructional leadership phenomenon as the basic concept of effective leadership. This study was designed to investigate both principals and teachers about the role of principals’ instructional leadership. A qualita…