PROGRAMMING THE BISTABLE DYNAMIC VIBRATION ABSORBERS OF A 1D-METASTRUCTURE FOR ADAPTIVE BROADBAND VIBRATION ABSORPTION

This research addresses a critical challenge in structural engineering—achieving comprehensive vibration control and energy dissipation in meta-structures. Departing from the limitations of passive structures with fixed bandgaps, we propose an innovative approach utilizing active meta-structures capable of dynamically tuning their bandgaps. The primary goal is to introduce an efficient method for programming meta-structures with multiple variable bandgaps, thereby enabling effective vibration attenuation across a broad frequency spectrum. The methodology involves transforming passive resonators into bistable adaptable Dynamic Vibration Regulators (DVRs) through a sophisticated switching mechanism. This adaptation sets the stage for numerous unique combinations by independently switching each resonator. A novel n-bit configuration method is developed to generate diverse meta-structure patterns, while an Artificial Neural Network (ANN) architecture predicts responses and bandgaps across these patterns. Additionally, a groundbreaking Reinforcement Learning (RL) algorithm is proposed to program diverse bandgaps in the meta-structure, providing a solution to counteract vibrations experienced by the structure. The research emphasizes the crucial role of the number of unit cells in the effectiveness of vibration attenuation. Common assessment methods, such as Frequency Response Functions (FRFs), fall short in providing a qualitative analysis of elastic wave reflection and absorption in bandgaps based on the number of unit cells. To bridge this gap, the study introduces a novel approach, characterizing and evaluating bandgap quality through absorption coefficients. Designing structures with selective frequency transmission is a formidable challenge, especially when aiming for a broad frequency spectrum. The proposed solution involves architecturing meta-structures with multiple sets of DVRs arranged in an array, strategically absorbing different frequencies at various locations within the structure. This groundbreaking approach not only addresses challenges in frequency selectivity but provides a profound understanding of elastic wave behavior, promising unparalleled energy absorption efficiency in the bandgap region. In summary, this research advances the field by introducing dynamic adaptability in structures, allowing them to absorb vibrations across a vast frequency spectrum. The proposed methodology holds promise for transformative applications in mechanical engineering, civil engineering, materials science, and beyond, ushering in a new era of resilient and dynamically responsive structures

Design and Analysis of Plastic Fuel Tank for Three Wheeler CNG Passenger Vehicle

The current trend is to provide weight/strength effective and reliable products which satisfy the stringent requirements. The fuel tank is used in automobile industries to carry fuel and supply fuel to the engine via fuel filter, fuel pump. The aim of this project is to design plastic fuel tank for three wheeler vehicles. This study aimed at to make a new design of plastic fuel tank for three wheeler vehicles in order to reduce production cost of fuel tank and make most secure and safe fuel tank. The project involves geometry and finite element modeling of plastic fuel tank design. Study the existing fuel tank and then begins the attempt to make plastic fuel tank. Geometrical modeling was done using Pro-E; finite element modeling using Hyper mesh software and analysis was done using ANSYS software. Experimental test was conducted to examine the effectiveness of the plastic fuel tank. Result of static load analysis of the existing fuel tank and plastic fuel tank design is compared to prove the design is safe. Similarly experimental result of the existing fuel tank bracket and the plastic fuel tank bracket are compared to prove the design is safe. Plastic fuel tank design gives optimum design for same loading condition with huge amount of weight reduction. DOI: 10.17762/ijritcc2321-8169.15069

Minimizing the Overhead caused due to dynamic nodes in Mobile Ad-hoc Networks using Zone routing protocol

Opportunistic data forwarding has become a interesting topic in the multi-hop wireless networking. Opportunistic data forwarding is not used in mobile ad hoc networks (MANETs) due to the lack of an efficient lightweight proactive strong source routing scheme. Proactive Source Routing uses Breadth First Spanning Trees (BFSTs) and maintains more network topology information to facilitate source routing. Although it has greatly reduced overhead than traditional link state (LS)-based routing protocols and reactive source routing protocols, the computational and memory overhead involved in maintaining BFSTs to reach every node in the denser networks will be high. In this paper Zone-based Proactive Source Routing Protocol is proposed. Zone routing protocol (ZRP) uses partition based routing. The ZRP make use of source routing inside a zone and on-demand routing outside the zone. This approach combines the advantages of both proactive and zone based routing protocols. The simulation shows that the Z-PSR i.e. zone based proactive source routing protocol performs better compared to PSR

Assessment of user needs of primary biodiversity data: Analysis, concerns, and challenges

A Content Needs Assessment (CNA) survey has been conducted in order to determine what GBIF-mediated data users may be using, what they would be using if available, and what they need in terms of primary biodiversity data records. The survey was launched in 2009 in six languages, and collected more than 700 individual responses. Analysis of the responses showed some lack of awareness about the availability of accessible primary data, and pointed out some types of data in high demand for linking to distribution and taxonomical data now derived from the GBIF cache. A notable example was linkages to molecular data. Also, the CNA survey uncovered some biases in the design of user needs surveys, by showing demographic and linguistic effects that may have influenced the distribution of responses received in analogous surveys conducted at the global scale

Occurrence of unicorn leather jacket, Alutera monoceros (Linnaeus) in dol net at Bassein Koliwada (Maharashtra)

Alutera monoceros was landed at Bassein Koliwada by dol net on 3/9/2003. The depth of operation was 35 - 40 meter. The specimen ranged between 420 -462 mm in length and weighing 700 - 900 gm

Unusual landing of silver pomfret,Pampus argenteus by karali dol net at Bassein Kolliwada(Vasai)landing centre,Thane district,Maharashtra

Post monsoon fishing from 10th june to 15 th Augustis avery important period for the silver pomfret Pampus argenteus in traditional Karli dol net fishery at Bassein Kolliwada landing centre,Thane district,Maharashtra

बासीन कोल्लिवाडा (वसाइ) अवतरण केंद्र, ताने जिला, महाराष्ट्र में कारली डोल जाल द्वारा रजत पाँम्फ्रेट पाम्पस आर्जंन्टस का असाधारण अवतरण

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High Mobility Group Box Protein 1 (HMGB1): The Prototypical Endogenous Danger Molecule

High mobility group box protein 1 (HMGB1) is an evolutionary ancient nuclear protein that exerts divergent biological tasks inside and outside of cells. The functions of HMGB1 depend on location, binding partners and redox states of the molecule. In the nucleus, HMGB1 organizes DNA and nucleosomes and regulates gene transcription. Upon cell activation or injury, nuclear HMGB1 can translocate to the cytoplasm, where it is involved in inflammasome activation and pyroptosis, as well as regulation of the autophagy/apoptosis balance. When actively secreted or passively released into the extracellular milieu, HMGB1 has cytokine, chemokine, neuroimmune and metabolic activities. Thus, HMGB1 plays multiple roles in the pathogenesis of inflammatory diseases and mediates immune responses that range from inflammation and bacterial killing to tissue repair. HMGB1 has been associated with divergent clinical conditions such as sepsis, rheumatoid arthritis and atherosclerosis. HMGB1 initiates and perpetuates immune responses during infectious and sterile inflammation, as the archetypical alarmin and damage-associated molecular pattern (DAMP) molecule. We here describe advances in the understanding of HMGB1 biology with focus on recent findings of its mission as a DAMP in danger sensing and as a therapeutic target in inflammatory diseases