1,618 research outputs found
#x03C3;LBDR: Congestion-aware logic based distributed routing for 2D NoC
No full textWith the advent of multi-core technologies, a significant amount of research has been directed towards running multiple applications concurrently and efficiently. This elevates work load on the network which leads to congestion and subsequently degrades the performance and increases the latency of the network. Table based methods can be used for handling congestion but these methods are not scalable in terms of area. In this paper, we propose a novel routing mechanism that eliminates the need of large routing tables. The results show the performance of σLBDR is better than competing routing algorithms for handling congestion as the area requirement is very less irrespective of the size of the network.</p
Network-on-chip: Current issues and challenges
No full textDue to the shrinking transistor sizes, the density of ICs roughly doubles every year as predicted by Moore's law. These advancements in the VLSI integration densities towards the nano scale era, witnessed a paradigm shift from computation centric designs to communication centric designs incorporating very large number of simple cores. Plenty of traditional interconnect schemes like point to point, buses and crossbars are available to interconnect small number of cores. While achieving fast and efficient communication with point to point communication schemes, wire density is a barrier for adapting them to many core architectures. Moreover, buses are simpler in design, they suffer from the scalability and arbitration issues along with bandwidth bottleneck as the number of cores increases. Similarly area and power requirements of a crossbar limits its applicability. Hence, in many core architectures like Chip Multiprocessors (CMP) and Multi processor System-on-Chip (MPSoCs), emerge the need of an efficient communication infrastructure as traditional solutions fails to handle the communication challenges. Network-on-Chip (NoC), a scalable and modular design approach, has been proposed as a promising alternative to traditional bus based architectures for inter-core communication
Replication Data for: A Toroidal Metamaterial Switch
No full textToroidal dipole is a localized electromagnetic excitation that plays an important role in determining the fundamental properties of matter due to its unique potential to excite nearly non-radiating charge-current configuration. Toroidal dipoles were recently discovered in metamaterial systems where it has been shown that these dipoles manifest as poloidal currents on the surface of a torus and are distinctly different from the traditional electric and magnetic dipoles. Here, we demonstrate an active toroidal metamaterial switch in which the toroidal dipole could be dynamically switched to the fundamental electric dipole or magnetic dipole, through selective inclusion of active elements in a hybrid metamolecule design. Active switching of non-radiating toroidal configuration into highly radiating electric and magnetic dipoles can have significant impact in controlling the electromagnetic excitations in free space and matter that could have potential applications in designing efficient lasers, sensors, filters, and modulators
sj-pdf-1-pie-10.1177_09544089211073296 - Supplemental material for Exploring Casting Defects of AA7075 Alloy in the Gravity Die Casting Simulation of an IC Engine Block
No full textSupplemental material, sj-pdf-1-pie-10.1177_09544089211073296 for Exploring Casting Defects of AA7075 Alloy in the Gravity Die Casting Simulation of an IC Engine Block by T. Aneesh, K. Pawan, L. Mohan, P. Hari Krishna, Tapano Kumar Hotta, Chinmaya Prasad Mohanty and Manoj Gupta in Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering</p
Replication Data for: Electrically Tunable Topological Notch Filter for THz Integrated Photonics
No full textElectromagnetic filtering is essential for emerging integrated photonic technologies and widely adaptable processing of high-bandwidth signals. Conventional electro-optic modulator-based photonic approach for signal filtering at microwave frequencies could not be implemented at terahertz (THz) frequencies due to the unavailability of the THz signal-driven optical modulator. Here, we demonstrate an electrically tunable on-chip THz photonic notch filter based on the topologically protected valley hall waveguide-cavity platform. Our device shows a significantly large notch suppression depth of more than 20 dB with a return loss of 13 dB at in the entire tuning range of notch frequency. The feedback control circuit enabled precise control of the notch frequency shift with a minimum step size of 7 MHz. Our work extends the application of topological photonic crystals in developing THz integrated photonic devices for transformative technologies, including sixth generation (6G) communication and high-resolution spectral sensing
RECTIFIED DIFFERENTIAL CRYPTANALYSIS OF 16 ROUND PRESENT
No full textRECTIFIED DIFFERENTIAL CRYPTANALYSIS OF 16 ROUND PRESENT
Manoj Kumar , Pratibha Yadav and Meena Kumari
SAG, DRDO, Metcalfe House, Delhi-110054, India
ABSTRACT
In this paper, we have suggested rectifications in differential cryptanalysis of ultra-lightweight block cipher PRESENT reduced to 16 rounds. We have shown that proposed differential attack by Wang [3] on 16 round PRESENT can recover at the most 30 subkey bits, although the author has claimed to recover 32 bits of subkey for last two rounds. We have also computed data complexity and success probability for recovering 30 subkey bits accordingly by the differential attack on 16 round PRESENT.
KEYWORDS
Lightweight block cipher, differential cryptanalysis, PRESEN
Replication Data for: Sensing with toroidal metamaterial
No full textLocalized electromagnetic excitation in the form of toroidal dipoles has recently been observed in metamaterial systems. The origin of the toroidal dipole lies in the currents flowing on the surface of a torus. Thus, the exotic toroidal excitations play an important role in determining the optical properties of a system. Toroidal dipoles also contribute towards enabling high quality factor subwavelength resonances in metamaterial systems which could be an excellent platform for probing the light matter interaction. Here, we demonstrate sensing with toroidal resonance in a two-dimensional terahertz metamaterial in which a pair of mirrored asymmetric Fano resonators possess anti-aligned magnetic moments at electromagnetic resonance that gives rise to a toroidal dipole. Our proof of concept demonstration opens up an avenue to explore the interaction of matter with toroidal multipoles that could have strong applications in sensing of dielectrics and biomolecules
Anti cancer Activity of Vitamin C Against Leukemia A Review
No full textLeukemia is a gathering of malignancy began from bone marrow and will deliver impact on white platelet which will thus lead to anomaly. Presently the development of impact will continue by the undeveloped and juvenile WBC. Leukemia is an expansive term covering a range of infections. The focal point of enthusiasm for oncology especially in leukemia vitamin C has the best technique by which it demonstrates the more noteworthy outcome. An undeveloped cell takes amazingly elevated amounts of Ascorbic acid, which at that point allot their capacity and subdue the improvement of leukemia. Vitamin C levels manage HSC numbers and capacity. At the point when ascorbate levels are reduced, it can give the power to the deactivation of a catalyst called Tet2. The inactivation of TET2 is represented by change and insufficiency of vitamin C may constrain Tet2 work in tissues in a way that builds the danger of leukemia. TET2 function is actually strengthen by ascorbate level. By encouraging DNA demethylation, tremendous dose of ascorbate treatment can persuade stem cells to develop and the growth of cancerous stem cells will retarded by the tremendous dose of ascorbate level as investigated in mice. Tremendous dose of ascorbate might become a safe treatment for blood diseases caused by TET2 deficient leukemia stem cells, most likely in combination with other targeted therapies. Tarun Gupta | Virendra Kumar Vishwakarma | Manoj Kumar Maurya | Khushdil Khan "Anti-cancer Activity of Vitamin-C Against Leukemia: A Review" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-2 | Issue-4 , June 2018, URL: https://www.ijtsrd.com/papers/ijtsrd14250.pd
Replication Data for: YBa2Cu3O7 as a high-temperature superinductor
No full textThe magnetic behavior of type-II superconductors is explained by a quantum vortex with a supercurrent encircling a coherence-length sized core. In a superconducting film with thickness t < λL, the vortex field decays slowly as 1/r2, extending to the Pearl length =22, known as the Pearl vortex, rather than diverging as log(1/r) and decaying with London penetration depth, λL, as in Abrikosov vortex. However, the effect of Pearl vortex on large enhancement of kinetic inductance had not been fully explored. Here, we discovered Pearl inductance, an additional form of kinetic inductance arising from geometrical structuring of high-Tc YBCO superconductor thin films (Tc~81K) at the scale. This results from extension of vortex screening supercurrents from λL to 14λL in an ultrathin meta-atom of thickness λL/7, enabling terahertz superinductance. Our device show impedance exceeding the quantum resistance limit ≈6.47 Ω by 33%, offering possibilities for cutting-edge electronic, photonic, and quantum devices
Mapping socio-environmental vulnerability to climate change in different altitude zones in the Indian Himalayas
No full textSocio-environmental vulnerability to climate change in mountain landscapes depends upon multiple factors that can vary across altitude zones. However, there is limited knowledge on specific indicators suitable for assessing socio-environmental vulnerability that address altitude-related variations. This study systematically analysed important components of vulnerability and mapped them by weight for four altitude zones in the Indian Himalayas. Indices focusing on components of the three different dimensions of vulnerability (adaptive capacity, exposure, sensitivity) were identified based on the literature. Data on these different indices were then collected through a pre-tested questionnaire-based survey of 403 randomly selected households in the four altitude zones (2000 m a.s.l. (very high)) in the Garhwal Himalaya, India. Components of vulnerability dimensions were assessed and significantly contributing components were identified by Principal Component Analysis (PCA). An entropy method was used to weight the dimensions of vulnerability for the different altitude zones. Vulnerability was estimated based on the Manush approach of human development index. The data were used to produce a spatial map based on a proposed Spatial Social Vulnerability Index (SSEVI). SSEVI was proposed based on social and environmental indicators of vulnerability with a mix of spatial indicators to generate spatially bound vulnerability. The results indicated that communities in the middle and high altitude zones (1000–2000 m a.s.l.) were more vulnerable (score 0.32 and 0.31, respectively) than those in the low and very high zones (score 0.29 and 0.30, respectively). Greater vulnerability was mainly due to high exposure to extreme events and less adaptive capacity, which can affect agricultural production negatively, in combination with high population density in middle-altitude communities. There was lower pressure on natural resources and better connectivity in the low altitude zone (<1000 m a.s.l.), reducing vulnerability. The spatial SSVI map clearly revealed vulnerable hotspots, suggesting that government supported adaptation measures should not be similar across the altitude gradient in the Indian Himalayas, but should be based on available resources, pressure and livelihood options for achieving sustainability under climate change
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