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Analysis of Bio-inspired Kinematic Patterns Pectoral Fin with Shape Memory Alloy (SMA)
Mohammad Eftekhari,
Saeed Rahmanian,
Pezhman Moradi
Issue:
Volume 2, Issue 1, March 2017
Pages:
1-7
Received:
13 December 2016
Accepted:
5 January 2017
Published:
30 January 2017
DOI:
10.11648/j.ajdmkd.20170201.11
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Abstract: Pectoral fins have received the attention of many researchers because of their important role in maneuverability underwater in the recent years. This paper presents the study of a novel flexible robotic-fin actuated and the swimming propulsion by Shape Memory Alloy (SMA) inspired by a Koi Carp. In this paper, the morphological and mechanics parameters of a koi Carp pectoral fin from a carp is first studied. The motion of the pectoral fins is analyzed, which are difficult to reproduce by artificial pectoral fins and descending and ascending, the five basic gestures of the robotic fin are well achieved by the coordinating control of the fin base and fin rays, which are relaxation, expansion, bending, cupping and undulation. Secondly, a simplified theoretical model of the SMA fin plate is derived, thermodynamics of the SMA plate and the relationship between curvature and phase transformation are analyzed. Thirdly, Dynamic modeling of a flexible SMA tail, several simulations and model experiments are conducted according to the previous computation and analyses. Consequently, the five basic gestures of the robotic fin such as relaxation; expansion; bending; cupping; undulation, are extracted from the 3D grid graph. The results of kinematic of flexible pectoral fins will provide a basis to flexible pectoral fin and butterfly-inspired underwater.
Abstract: Pectoral fins have received the attention of many researchers because of their important role in maneuverability underwater in the recent years. This paper presents the study of a novel flexible robotic-fin actuated and the swimming propulsion by Shape Memory Alloy (SMA) inspired by a Koi Carp. In this paper, the morphological and mechanics paramet...
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Motion Detection of Some Geometric Shapes in Video Surveillance
Larbi Guezouli,
Hanane Belhani
Issue:
Volume 2, Issue 1, March 2017
Pages:
8-14
Received:
21 December 2016
Accepted:
6 January 2017
Published:
30 January 2017
DOI:
10.11648/j.ajdmkd.20170201.12
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Abstract: Motion detection is a live issue. Moving objects are an important clue for smart video surveillance systems. In this work we try to detect the motion in video surveillance systems. The aim of our work is to propose solutions for the automatic detection of moving objects in real time with a surveillance camera. We are interested by objects that have some geometric shape (circle, ellipse, square, and rectangle). Proposed approaches are based on background subtraction and edge detection. Proposed algorithms mainly consist of three steps: edge detection, extracting objects with some geometric shapes and motion detection of extracted objects.
Abstract: Motion detection is a live issue. Moving objects are an important clue for smart video surveillance systems. In this work we try to detect the motion in video surveillance systems. The aim of our work is to propose solutions for the automatic detection of moving objects in real time with a surveillance camera. We are interested by objects that have...
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Investigation on the QOE and Packet Loss Rate of the IOT Network
Issue:
Volume 2, Issue 1, March 2017
Pages:
15-30
Received:
22 December 2016
Accepted:
6 January 2017
Published:
4 February 2017
DOI:
10.11648/j.ajdmkd.20170201.13
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Abstract: The Internet of things, including Internet technology, including wired and wireless networks. In this paper, we investigate on the QOE and packet loss rate of the network because QOE is important in the network and packet loss rate is the key point in many papers. In order to study the influence of packet loss on the users’ quality of experience QoE and establish the Mapping model of the two when the video transmit in the network, building a NS2+ MyEvalvid simulation platform, by the method of modifying QoS parameters to simulate different degrees of packet loss, focus on the influence of packet loss on QoE and establish the mapping model between them. Experimental results show that, packet loss has a significant influence on Quality of experience. Packet loss rate and the Quality of experience presents a nonlinear relationship, and use Matlab to establish the mapping model, this model’s accuracy is high, easy to operate, can real-time detect packet loss has influence on the user’s quality of experience (QoE). High thinking turn thinking and intelligence to do system and intelligent housing system. The application of intelligent transportation and intelligent building and intelligent engineering system and Intelligent farm and JSP sponge in the Internet of things is the future direction of development.
Abstract: The Internet of things, including Internet technology, including wired and wireless networks. In this paper, we investigate on the QOE and packet loss rate of the network because QOE is important in the network and packet loss rate is the key point in many papers. In order to study the influence of packet loss on the users’ quality of experience Qo...
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Factors That Affect Participation of Households in “Iqub” in Arba Minch Town: A Case of Wuha Minch Kebele
Issue:
Volume 2, Issue 1, March 2017
Pages:
31-36
Received:
29 December 2016
Accepted:
13 January 2017
Published:
9 February 2017
DOI:
10.11648/j.ajdmkd.20170201.14
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Abstract: The main objective of this research was to identify factors that affect participation of households in “Iqub”in Arba Minch town Wuha Minch Kebele. To reach the aim, the data have been collected largely through questionnaire from 85 households selected by simple random sample out of 1925 total population during the time of study conducted. The results of this study showed that 76.5% of households were participated and the remaining 23.5% were not participated. Household participation was associated with Age, occupation, changes in living standard, income, Expenditure.
Abstract: The main objective of this research was to identify factors that affect participation of households in “Iqub”in Arba Minch town Wuha Minch Kebele. To reach the aim, the data have been collected largely through questionnaire from 85 households selected by simple random sample out of 1925 total population during the time of study conducted. The resul...
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Using Macbeth Method for Technology Selection in Production Environment
Issue:
Volume 2, Issue 1, March 2017
Pages:
37-41
Received:
27 December 2016
Accepted:
23 January 2017
Published:
20 February 2017
DOI:
10.11648/j.ajdmkd.20170201.15
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Abstract: Technology selection has a very crucial role to any company aiming for competitive advantage in the globalized world. In a competitive environment, firms try to meet customer demand and their increasing quality expectations, at the same time finding ways to decrease costs using factors such as flexibility, quality and innovativeness. Technology selection and evaluation problem have many criteria (both subjective and objective factors) that conflict with each other. To overcome this problem multi criteria decision making methods are developed. In this study MACBETH method is used to select and evaluate technology alternatives. Decision makers’ opinions are evaluated to rank the alternatives.
Abstract: Technology selection has a very crucial role to any company aiming for competitive advantage in the globalized world. In a competitive environment, firms try to meet customer demand and their increasing quality expectations, at the same time finding ways to decrease costs using factors such as flexibility, quality and innovativeness. Technology sel...
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