In this paper we present an experimental wireless sensor network system implemented in an office environment. The system is characterised by a network of sensor nodes with configurable physical layer parameters, accom...
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ISBN:
(纸本)9781622762835
In this paper we present an experimental wireless sensor network system implemented in an office environment. The system is characterised by a network of sensor nodes with configurable physical layer parameters, accompanied by a set of lightweight and flexible protocols for communications among the sensor nodes. The system design is targeted at relatively small-scale wireless sensor network applications where the optimum protocol design is highly dependent on the specific application requirements. The experimental system also serves as an ideal platform for testing ideas and performing feasibility studies. The idea of using lower data rate transmissions for orphan node detection and capture is explored on this system and measurements of the radio range difference with different transmission data rates are reported. The measurement results show that the idea is feasible and effective in a realistic office environment.
I thank Dr. Cook ( 1) for her comments. As described ( 2), my main concern is with use of risk reclassification calibration statistics to draw conclusions from the risk reclassification tables, not with the tables the...
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I thank Dr. Cook ( 1) for her comments. As described ( 2), my main concern is with use of risk reclassification calibration statistics to draw conclusions from the risk reclassification tables, not with the tables themselves. The tables can indeed provide valuable insights. The issue is that hypothesis tests using reclassification calibration statistics are testing only 1) if the models fit the data in the classic sense of Hosmer and …
In this work, a new dual-band antenna, operating at two frequency-bands centered at 4.7 GHz and 7.5 GHz, is proposed which its operational frequency band is controlled by using reconfigurable notch filters. The idea i...
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ISBN:
(纸本)9781424495627;9781424495634
In this work, a new dual-band antenna, operating at two frequency-bands centered at 4.7 GHz and 7.5 GHz, is proposed which its operational frequency band is controlled by using reconfigurable notch filters. The idea is developed here for both case of ideal (MEMS) and non-ideal (Semiconductor diodes) switches. The simulations done by IE3D for each design, are verified with measurements.
Should a sound understanding and experience of making underpin design skills? In an age of design data, what does the architect still have to gain from the physical and tacit? Bob Shell, guest-editor of Design Through...
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Should a sound understanding and experience of making underpin design skills? In an age of design data, what does the architect still have to gain from the physical and tacit? Bob Shell, guest-editor of Design Through Making, outlines the ideas behind the issue and how they have prompted intriguing and impassioned responses from a diverse array of contributors.
Upper limb functionality is an integral part of everyday interaction with the environment right from the very first minutes of human life. This paper investigates the experimental application of the IDEA (Input Device...
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ISBN:
(纸本)9781479975617
Upper limb functionality is an integral part of everyday interaction with the environment right from the very first minutes of human life. This paper investigates the experimental application of the IDEA (Input Device Evaluation Application) system on patients with multiple sclerosis at an early stage and without clinically overt motor deficits, in order to assess their upper limbs' motor skills. The objective of the current study is to test the sensitivity and reliability of the IDEA system regarding the evaluation of multiple kinetic parameters of upper limbs. 29 patients who were hospitalized in the Demyelinating Diseases Section of Eginition Hospital's Neurological Clinic and 25 healthy participated in the experiments. data derived from the experiment are complemented with demographics. The acquired results analysis reveals that the IDEA system sensitivity is high enough to predict the presence of early upper limb multiple sclerosis with a 69.1% success rate.
Robust optimization tries to find flexible solutions when solving problems with uncertain scenarios and vague information. In this paper we present a multiobjective evolutionary algorithm to solve robust multiobjectiv...
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ISBN:
(纸本)9781479975617
Robust optimization tries to find flexible solutions when solving problems with uncertain scenarios and vague information. In this paper we present a multiobjective evolutionary algorithm to solve robust multiobjective optimization problems. This algorithm is a novel adaptive method able to evolve separate populations of robust and non-robust solutions during the search. It is based on the infeasibility driven evolutionary algorithm (IDEA) and uses an additional objective to evaluate the robustness of the solutions. The original and adaptive IDEAs are applied to solve the r-TSALBP-m/A, an assembly line balancing model that considers a set of demand production plans and includes robustness functions for measuring the temporal overloads of the stations of the assembly line with respect to the plans. Our results show that the proposed adaptive IDEA gets more robust non-dominated solutions for the problem. Also, we show that, for the case of the r-TSALBP-m/A, we can obtain Pareto fronts with a higher convergence by using the adaptive version of the algorithm.
This paper identifies the possibility of using electronic compasses and accelerometers in mobile phones, as a simple and scalable method of localization without war-driving. The idea is not fundamentally different fro...
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ISBN:
(纸本)9781424458363
This paper identifies the possibility of using electronic compasses and accelerometers in mobile phones, as a simple and scalable method of localization without war-driving. The idea is not fundamentally different from ship or air navigation systems, known for centuries. Nonetheless, directly applying the idea to human-scale environments is non-trivial. Noisy phone sensors and complicated human movements present practical research challenges. We cope with these challenges by recording a person's walking patterns, and matching it against possible path signatures generated from a local electronic map. Electronic maps enable greater coverage, while eliminating the reliance on WiFi infrastructure and expensive war-driving. Measurements on Nokia phones and evaluation with real users confirm the anticipated benefits. Results show a location accuracy of less than 11m in regions where today's localization services are unsatisfactory or unavailable.
The idea of control performance assessment is becoming very important in the process control area. One of the first performance monitoring index was based on the minimum variance control benchmark based method propose...
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ISBN:
(纸本)9781467322591
The idea of control performance assessment is becoming very important in the process control area. One of the first performance monitoring index was based on the minimum variance control benchmark based method proposed by Harris. This paper proposes the switching control method based on the controller performance assessment. Finally, experimental result demonstrate the practically and utility of this idea.
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