This paper presents the printing of resistive and interdigitated (IDE) capacitive devices for temperature and humidity sensing applications, respectively, on biodegradable polylactic acid (PLA) substrates. Inkjet and ...
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This paper presents the printing of resistive and interdigitated (IDE) capacitive devices for temperature and humidity sensing applications, respectively, on biodegradable polylactic acid (PLA) substrates. Inkjet and gravure printing were evaluated to transfer silver-based nanoparticles inks. Flash photonic ink sintering methodologies were employed to maintain the PLA mechanical integrity due to its low glass transition temperature (58 °C). Between the two printing techniques investigated, gravure-printed devices on 200 μm-thick PLA sheets were shown to have better resolution and higher sensitivities to temperature and humidity (1100 ppmK -1 and 5.6 fF/%RH). Additionally, we demonstrated the inkjet printing of IDE onto thin (25 μm) dissolved-PLA spin-coated substrates, to enhance the mechanical flexibility and to reduce the response time to humidity (from 238 s to 70 s). Finally, a low temperature encapsulation is proposed by embedding the printed structures within PLA sheets.
A domestic microwave oven operating at 2.45 GHz was used in our previous work to study of pests eradication in milled rice. To deeply and clearly understand the heating process, this research paper presents numerical ...
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A domestic microwave oven operating at 2.45 GHz was used in our previous work to study of pests eradication in milled rice. To deeply and clearly understand the heating process, this research paper presents numerical simulations of the domestic microwave oven. The simulation process consists of two physics phenomena which are electromagnetism and heat transfer. Numerical results showed that location of the container of a rice bulk placed in cooking chamber affects the distribution of electric field in the chamber and this in turn affects the heat distribution in the rice bulk. In addition, temperature inside the rice bulk increases according to the increasing of the microwave exposure duration.
This article investigates the problem of distributed channel selection in opportunistic spectrum access (OSA) system in which the channel states varying from slot to slot due to the influence of fading. The existing w...
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ISBN:
(纸本)9781479979035
This article investigates the problem of distributed channel selection in opportunistic spectrum access (OSA) system in which the channel states varying from slot to slot due to the influence of fading. The existing work considering with timevarying environment supposed users can receive a reward after successful contention of a channel. This assumption is not conformed to the realistic dynamic channel environment since the SNR at the receiver may be lower than a threshold value that the receiver can't receive information accurately. In this article, user can receive a positive reward only after a successful contention of a channel as well as the SNR at the receiver larger than the threshold value, otherwise, receive a zero reward. We formulate the channel selection problem as a non-cooperative game and prove it is a potential game which has at least one pure strategy Nash equilibrium. In addition, we propose a multi-agent learning algorithm. Users just need the current reward to learn to adj ust channel selection strategy.
In this paper, a test case reuse model, Test Case Reuse Model , is proposed as a solution to the normative, effectiveness and efficiency issues for the design of test cases for software. Test Case Reuse Model is a ref...
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ISBN:
(纸本)9781467369541
In this paper, a test case reuse model, Test Case Reuse Model , is proposed as a solution to the normative, effectiveness and efficiency issues for the design of test cases for software. Test Case Reuse Model is a refinery, extraction and expression of design methods of test cases in test case sets with similar features of test requirements. Test Case Reuse Model consists of five components, which are the model reuse index, the basic information for model reuse, the test data body, the test protocol body and the execution body. Test Case Reuse Model is developed by testing expert based on test assets such as test term sand cases in the library. Based on Test Case Reuse Model , not only are testers able to increase the efficiency of the design for test terms and cases with the same features, but also can guarantee the normativeness and effectiveness of test design.
The SoSE approach is a useful developmental paradigm for Disaster Management Systems. The multi-dimensional nature of such systems require the reuse and leveraging of existing systems, synergistically combined to deli...
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The SoSE approach is a useful developmental paradigm for Disaster Management Systems. The multi-dimensional nature of such systems require the reuse and leveraging of existing systems, synergistically combined to deliver comprehensive information management capability. This paper presents the Presentation of Human Activity Sequence of Events (PHASE) an information infrastructure for the analysis, and presentation of forced population movements and their consequent effects on refugee populations. PHASE, modeled as an integrated meta-system is used to represent the multi-dimensional nature of the analysis required for the understanding and mitigation of the effects of forced population movements at the Mugunga III camp in the Democratic Republic of Congo (DRC). This paper presents motivation for the development of PHASE, its architecture and implementation.
In order to detect and prevent DoS/DDoS attacks that exploit IP address spoofing, the IP traceback technique has been introduced and developed with variety of methods including packet marking. By means of inserting ma...
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In order to detect and prevent DoS/DDoS attacks that exploit IP address spoofing, the IP traceback technique has been introduced and developed with variety of methods including packet marking. By means of inserting marking information on the travel path into rarely used fields in the header of IP packets, the destination host can trace back the original-source location of received packets, which is useful for supporting detection of attacks. Many schemes of packet marking IP traceback have been proposed, but still have nevertheless some drawbacks such as low traceback rate, heavy computational overhead due to high-required number of marked packets and marking size. In this paper, we proposed PLA DFM, a novel efficient enhanced solution of Deterministic Flow Marking based on adaptation with real traffic characteristics. The analytic result shows that the proposed solution provides a far higher successful mark rate, lower computational overhead compared to the original scheme and other marking techniques with unnoticeable increased traffic size.
This paper presents the effects of shortest path routing in wavelength-routed optical WDM networks; in particular we evaluated the effect of this routing scheme on the performance of wide all-optical WDM networks. Giv...
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This paper presents the effects of shortest path routing in wavelength-routed optical WDM networks; in particular we evaluated the effect of this routing scheme on the performance of wide all-optical WDM networks. Given a session request and a number of available wavelengths on each optical fiber, the routing and wavelength assignment (RWA) problem is to establish a lightpath (routing subproblem), i.e., to determine a path between two nodes, and also assign a wavelength along this path (wavelength assignment subproblem), so to maximize the number of satisfied requests for connections by taking into account some constraints. This study focuses on the routing subproblem in wavelength-routed all-optical WDM networks. We use Dijkstra's shortest path algorithm, to determine the shortest paths in terms of the number of hops (we assume that the links have the same weight, uniform traffic) from the source to other nodes in the network. We evaluate, for the first time, the performance of this algorithm for optical routing and we study the impact on the load distribution over the wide all-optical WDM network links. We also implement a simulation interface to evaluate this algorithm in wide all-optical WDM networks (different optical networks topologies were used in the simulation). This paper describes the inadequacy of the use of standard Dijkstra's shortest path routing, as it produces more unbalanced routes over the network links and unnecessary link overload.
The proposed method is targeted on reduction of hardware amount in logic circuit of Moore finite-state machine implemented with programmable logic arrays (PLA). The method is based on using more than minimal amount of...
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The proposed method is targeted on reduction of hardware amount in logic circuit of Moore finite-state machine implemented with programmable logic arrays (PLA). The method is based on using more than minimal amount of variables in codes of FSM internal states. The method includes two stages of state encoding. The second stage is connected with recoding of states inside each class of pseudoequivalent states.
Low density parity check (LDPC) code is an error correct code that can achieve performance close to Shannon limit and it is widely adopted in communication systems such as WiMAX and Wi-Fi. This paper presents a design...
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ISBN:
(纸本)9781479932849
Low density parity check (LDPC) code is an error correct code that can achieve performance close to Shannon limit and it is widely adopted in communication systems such as WiMAX and Wi-Fi. This paper presents a design of a flexible LDPC decoder for WiMAX based on the NoC platform. The implementation adopts layered decoding algorithm and exploits high parallelism that lies in the algorithm. Considering large quantity of data exchange between cores, we use stepped data exchange strategy and master-slave structure to reduce communication cost. The Cycle accurate simulation results show high speed-up and scalability of code rate of 5/6 with different code length in WiMAX in 4/8/16 processor systems.
We present fabrication and optical properties of some sub-wavelength structures studied in our group, including the sub-100 nm size gold and silver split ring resonators (SRRs). The sub-100-nm SRRs can have magnetic r...
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We present fabrication and optical properties of some sub-wavelength structures studied in our group, including the sub-100 nm size gold and silver split ring resonators (SRRs). The sub-100-nm SRRs can have magnetic resonance entering into the visible frequency spectrum. The silver SRRs as small as ~60 nm and fundamental magnetic resonance (LC-resonance) as short as ~604 nm have been successfully demonstrated. The resonance wavelengths of the LC and plasmon modes of the sub-100-nm SRRs are found to linearly decrease with the decrease of SRR size. Excellent agreement between LC-model and experimental data is obtained when the capacitance of the sub-100-nm SRRs is interpreted as capacitance between two spheres instead of between two parallel plates. We also present fourfold rotationally symmetric SRR lattice configuration in which the electric and magnetic resonant modes can be efficiently excited under unpolarized light illumination. Furthermore, the large area sub-100 nm SRR metamaterials formed by fourfold rotationally symmetric SRR lattice can be used for sensing with refractive index sensitivity as high as ~636 nm/RIU.
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