This paper presents the design of a compact triple-band artificial magnetic conductor using stacking of the complementary structure. The proposed triple-band complementary AMC is formed by combining ...the cross-shaped structure with three stubs of different lengths at each arm on one dielectric slab and its complementary geometry on the other dielectric slab. The proposed AMC provides the three 0° degree reflection phase frequencies at 2.45 GHz, 3.5 GHz, and 5.99 GHz with a ±90° reflection phase bandwidth of 0.2 GHz, 0.17 GHz, and 0.94 GHz, respectively. The unit cell size is 13 mm×13 mm (0.1λ 0 ×0.1λ 0 ), where λ 0 is the wavelength at the lowest resonance frequency of 2.45 GHz. The proposed structure is insensitive to incident polarization and angles due to the four-fold symmetry of the unit cell. In addition, on rotating the complementary structure, the AMC unit cell exhibits the two closely spaced reflection phase frequencies.
The United States Department of Energy has long term goals to develop solutions for managing the nations spent nuclear fuel and high-level waste inventory. The Integrated Waste Management program is ...employing system-level engineering and analysis principles to inform potential future waste management system architectures. Managing the SNF requires the use of system-level analysis software that considers waste generation, on-site (centralized storage), transportation infrastructure, and long-term disposal. The Next Generation System Analysis Model is an agent-based model that was developed to simulate the transportation and storage of SNF and HLW. NGSAM has the capability to detail the interaction and movement of individual components and groups, such as rail cars and casks. The SNF inventory from commercial nuclear reactors is currently in temporary storage at multiple locations spread across the US. Shipping of SNF from these locations relies on one of three transportation modes: rail, heavy-haul truck, or barge. Rail is the most preferred due to the size of the canisters and casks the SNF would be shipped in. Under some scenarios, a rail route might not be available to a reactor site or improving the rail infrastructure at shutdown sites might be too cost-prohibitive for utilities to opt for a direct rail transfer. Under such scenarios, using a barge or heavy haul truck to de-inventory the site and transfer the SNF to a nearby intermodal transfer site with adequate rail infrastructure where the payload could be transferred to a rail car might prove to be an attractive option. This work presents the various intermodal transportation options to move SNF from reactor sites to rail cars. Next, the operational steps in each of these modes to move the SNF from a reactor site and transfer it to a rail car is explored. The ideology, assumptions, and future steps are presented.
Biometric iris recognition technology is one of the popular recognition technologies in biometric authentication systems. Biometric iris recognition has been observed to provide high identification ...efficiency relative to the other biometric characteristic. This high performance is possible only through accurately segmenting the iris region from the given ocular image. Segmentation of pupil is one of the primary steps in iris segmentation. We propose a pupil segmentation method based on a circular active disc. As a prototype, this technique uses the active discs. The initialization of the active disc is automated using normalized template matching technique. Initialization is followed by an affine transformation of the active disc which makes the active disc lock on to the pupil. The optimum outline around the pupil region is achieved by making use of the Gradient Descent algorithm which is supplemented by efficiently computing the partial derivatives by using the Green's theorem. The algorithm has been validated on two publicly available databases Casia-V3 and the IIT Delhi iris database spanning 4598 iris images in total. The corresponding Dice index scores 0.9463 and 0.9308, respectively for the databases show the robustness of the algorithm, and a high degree of agreement with the ground truth.
A new SRR structure inspired by the geometry of eccentric circles is proposed. A broadside coupled eccentric split ring resonator (BC-ESRR) is used as a Stator-Rotor assembly where the Rotor moves ...angularly around the common axis with respect to the Stator. The trajectory of the first eigenfrequency of the proposed structure is skewed to either right or left by 75° with respect to the uniform width broadside coupled SRR's (BC-SRR) symmetric curve. The possible applications of the structure can be as a rotation sensor, as a chipless RFID tag with a frequency signature or in stereometamaterials.
Real time suspicious activities have been taken place every day at public places which threatens people, for that identification of Criminal person or missing person is necessary for police to take ...necessary action immediately so the crime rate will be reduced. This Project helps police by identifying of persons from datasets provided and trained and matches using face recognition using Deep neural networks which gives better accuracy. After the identification it detects and sends message to police with respective details and by sharing location currently person spotted. This done by recognizing and identifying the persons from database using face recognition Algorithm to detect faces of person accurately. It can also able to detect the person from 14 feet distance and tells the person is spotted or not. this system really useful when we try to solve real time problems occurred immediately and all actions can be taken place by IOT.
Background and Objectives: This study aimed to evaluate stress in the surrounding jaw bone due to root proximity of orthodontic mini-implant, using three-dimensional finite element method (FEM). ...Materials and Methods: Three FEM models with different locations of mini-implants were designed and classified according to their proximity to the molar root: Category I: Screw was separate from the root (about 1 mm away), Category II: Part of the screw thread was embedded in the periodontal membrane, Category III: Part of the screw thread touches the root. Each screw was inserted at 30° mesial to mandibular molar and traction force of 2N was applied to it at 45°. Stresses in the cortical bone surrounding implant were determined. Results: Mini-implant which was separate from the root showed least amount of stresses within the bone as compared to the implants in the other two categories. The pattern of stress distribution was concentrated near the neck of the mini-implant (at the point of entry into the bone), away from the direction of force application. Interpretation and Conclusion: Stresses in the bone decrease as the distance of the orthodontic mini-implant relative to the root increases.
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