540 research outputs found
sj-docx-4-pie-10.1177_09544089221087821 - Supplemental material for Design and development of a rapid prototyping system combining traditional fused deposition modeling and reconfigurable pins platform
No full textSupplemental material, sj-docx-4-pie-10.1177_09544089221087821 for Design and development of a rapid prototyping system combining traditional fused deposition modeling and reconfigurable pins platform by Vikrant Charak and Amit Kumar Sinha in Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering</p
sj-docx-2-pie-10.1177_09544089221087821 - Supplemental material for Design and development of a rapid prototyping system combining traditional fused deposition modeling and reconfigurable pins platform
No full textSupplemental material, sj-docx-2-pie-10.1177_09544089221087821 for Design and development of a rapid prototyping system combining traditional fused deposition modeling and reconfigurable pins platform by Vikrant Charak and Amit Kumar Sinha in Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering</p
sj-docx-3-pie-10.1177_09544089221087821 - Supplemental material for Design and development of a rapid prototyping system combining traditional fused deposition modeling and reconfigurable pins platform
No full textSupplemental material, sj-docx-3-pie-10.1177_09544089221087821 for Design and development of a rapid prototyping system combining traditional fused deposition modeling and reconfigurable pins platform by Vikrant Charak and Amit Kumar Sinha in Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering</p
sj-docx-1-pie-10.1177_09544089221087821 - Supplemental material for Design and development of a rapid prototyping system combining traditional fused deposition modeling and reconfigurable pins platform
No full textSupplemental material, sj-docx-1-pie-10.1177_09544089221087821 for Design and development of a rapid prototyping system combining traditional fused deposition modeling and reconfigurable pins platform by Vikrant Charak and Amit Kumar Sinha in Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering</p
sj-docx-5-pie-10.1177_09544089221087821 - Supplemental material for Design and development of a rapid prototyping system combining traditional fused deposition modeling and reconfigurable pins platform
No full textSupplemental material, sj-docx-5-pie-10.1177_09544089221087821 for Design and development of a rapid prototyping system combining traditional fused deposition modeling and reconfigurable pins platform by Vikrant Charak and Amit Kumar Sinha in Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering</p
Experimental research to Optimize Process Parameters in Machining of Non Conducting Material with hybrid non conconventional machining
No full textAmong all non conventional micro machining, electrochemical discharge machining ECDM is having high quality of material removal rate with zero residual stress. This machining has been accepted as a highly modern technology in micromachining. In this paper an effort has been done on micro drilling of glass using electrochemical discharge machining ECDM . A fixed tool and a step down transformer have been used to support the steady machining to increase the accuracy of work piece. The input parameters used in this experiment are voltage, concentration of electrolyte, enter electrode gap and ratio of area of electrode. MRR has been investigated over the input parameters. Feed rate and electrolyte temperature has been made constant of 3µm sec and 30°c respectively. Taguchi method is used to optimize the effect of the process parameters on MRR. The signal to noise S N ratio and the ANOVA analysis are employed to find the contributions of input parameters. Vikrant Sharma | Sunil Kumar "Experimental research to Optimize Process Parameters in Machining of Non Conducting Material with hybrid non conconventional machining" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-1 | Issue-4 , June 201
Design and implementation of compact dual-band conformal antenna for leadless cardiac pacemaker system
No full textThe leadless cardiac pacemaker is a pioneering device for heart patients. Its rising success requires the design of compact implantable antennas. In this paper, we describe a circularly polarized Hilbert curve inspired loop antenna. The proposed antenna works in the WMTS (Wireless Medical Telemetry Services) 1.4 GHz and ISM (Industrial, Scientific, and Medical) 2.45 GHz bands. High dielectric constant material Rogers RT/Duroid 6010 LM ([Formula: see text]=10) and fractal geometry helps to design the antenna with a small footprint of 9.1 mm3 (6 mm × 6 mm × 0.254 mm). The designed antenna has a conformal shape that fits inside a leadless pacemaker's capsule is surrounded by IC models and battery, which are tightly packed in the device enclosure. Subsequently, the integrated prototype is simulated deep inside at the center of the multi-layer canonical heart model. To verify experimentally, we have put dummy electronics (IC and battery) inside the 3D printed pacemaker's capsule and surfaced the fabricated conformal antenna around the inner curved body of the TCP (Transcatheter Pacing) capsule. Furthermore, we have tested the TCP capsule by inserting it in a ballistic gel phantom and minced pork. The measured impedance bandwidths at 1.4 GHz and 2.45 GHz are 250 MHz and 430 MHz, whereas measured gains are - 33.2 dBi, and - 28.5 dBi, respectively
Design and Performance Measurement of Worn-on-Body Instrumental Ultra-Miniaturized UWB Wearable Patch for e-Health Monitoring
No full textA conformal, ultra-miniaturized, circuit integrated ultra-wideband (UWB) coplanar-waveguide (CPW) antenna system for worn-on-body applications is developed in this article. The performance study of the proposed antenna is performed over a four-layer human body tissue model. A shortened ground plane and a pair of L-shaped stubs are included to the umbrella-shaped patch configuration to enhance the impedance bandwidth between 3.15-10.55 GHz, which encompass a variety of applications like WiMAX band (3.3-3.8 GHz), WLAN band (5.150-5.350 GHz), unlicensed ISM band (5.725-5.875 GHz), and X-band (7.250-7.745, and 7.900-8.395 GHz). The realization of wideband behavior for the reported antenna is studied using the characteristic mode theory (CMT). A maximum peak gain of 4.2 dBi is achieved with maximum radiations in broadside with higher front-to-back ratio in both E-plane and H-plane. Furthermore, the robustness of the proposed antenna is evaluated by studying its performances under different conditions, such as using a coaxial feeding system, bending and assessing SAR levels. The antenna is fabricated and assembled with various circuit components to validate its performance with the simulated counterpart. The experiment is carried out by placing the antenna structure over different parts of the human body. Finally, a comparative analysis is carried out and it is found that the proposed antenna exhibits 98.2% compactness than the existing antenna designs available in the literature
Multi-Channel Implantable Cubic Rectenna MIMO System With CP Diversity in Orthogonal Space for Enhanced Wireless Power Transfer in Biotelemetry
No full textFor wireless power transfer (WPT), an implantable cubic rectenna multi-input-multi-output (MIMO) system (CRMS), operating in dual industrial, scientific, and medical (ISM) frequency bands of 2.45 and 5.8 GHz, is presented as a receiver ( Rx ). CRMS is evolved to the proposed biocompatible full-package cubic rectenna (FPCR) by including the power and data management circuit modules. The dual frequency bands differentiated by orthogonal circular polarization (CP) in a spatial quadrature would serve as propagation channels for power, data, and control signals. Four dual-branch rectifiers are designed using both distributed and lumped elements on the backside of individual antenna elements. To demonstrate the feasibility of the proposed work as an integrated system for WPT, the structures are fabricated individually, where the transmitter ( Tx ), which is an external antenna, and rectifiers are tested in free space and FPCR in a custom-made canonical phantom. After validation of individual measurements, power delivery from the Tx to the FPCR is conducted experimentally to measure the integrated system’s radiofrequency (RF)-dc total conversion efficiency (TCE). The FPCR is designed to receive low RF power ( PRF ) of 0 dBm, where a single cubic rectenna element (CRE) provides dc power ( PDC ) of 0.26 and 0.33 mW at 2.45 and 5.8 GHz, respectively. Thereafter, the interconnection of CREs in a series/parallel configuration improved PDC to 0.5/1.39 and 0.51/1.64 mW, respectively. Additionally, human safety is considered by evaluating a maximum permissible exposure (MPE) limit and specific absorption rate (SAR) distribution in a canonical tissue model when both Tx and FPCR are excited with 1 W power
Securitization and mortgage default
No full textThe academic literature, the popular press, and policymakers have all debated securitization's contribution to the poor performance of mortgages originated in the run-up to the recent crisis. Theoretical arguments have been advanced on both sides, but the lack of suitable data has made it difficult to assess them empirically. The author examines this issue by using a loan-level data set from LPS Analytics, covering approximately two-thirds of the mortgages originated in 2005 and 2006, and including both securitized and nonsecuritized loans. ; The author finds evidence that privately securitized loans do indeed perform worse than observably similar, nonsecuritized loans. Moreover, this effect is strongest in prime mortgage markets, which have not been studied in the previous literature. For example, a typical prime loan becomes delinquent at a 20 percent higher rate if it is privately securitized, ceteris paribus. This is consistent with the existence of adverse selection; that is, that lenders used information not available to investors to securitize loans that were riskier than they otherwise appeared. By contrast, for subprime mortgages, the impact of private securitization is concentrated in low or no-documentation loans; this latter result is consistent with previous work such as Keys et al. (2009).Mortgage-backed securities ; Default (Finance)
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