487 research outputs found
Translation of Goswami Harirai's Jarasandhavadha Mahakavyam from Sanskrit to English with a Critical Introduction
No full textNot availabl
Measurement and performance evaluation of triple band differential integrated extraoral rectifying antenna for data transfer and RF energy harvesting for tongue drive system
No full textWearable assistive devices are vitally important for tetraplegic individuals to provide valuable insights into their intended directives tailored to tongue motions in wireless healthcare industries. The flexible differentially driven extraoral antenna and rectenna measurement system are developed to enable differential sensing and monitoring of the set of unique tongue gestures for extraoral tongue drive system (eTDS) applications in three frequency bands of Industrial, Scientific, and Medical (ISM) (915.0 MHz, 2400 MHz, and 5800 MHz). The performance analysis is carried out using the heterogeneous human head model. The differential rectifier is coplanarly integrated with the differential extraoral antenna on the same 0.254 mm thin and 9.5 mm wider Rogers RT/ Duroid 6010 LM substrate. The footprint of the fabricated differential rectenna is 0.135 0.082 0.002 where the planar size of differential rectifier is 15.75 2.5 mm2. The fabricated systems are situated closely to an artificial head model. The maximum conversion efficiency achieved at 2400 MHz and 5800 MHz is 83.45% and 74.8%, respectively, for 11 dBm of RF input power. Further, the link analysis, including interfacing circuit losses, was carried out theoretically at 915 MHz. Thus, the proposed differential extraoral systems can be employed to acquire and transmit the user intentions in eTDS inspired healthcare applications
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
Multi-level Threat Analysis in Anomalous Crowd Videos
No full textCrowd anomaly detection is a challenging problem in the field of computer vision. An abnormal event in a crowd scene can be labeled as threat in a video. Several existing solutions in this area have marked video frames either normal or abnormal event. Such categorization of frames can be referred as two-class threat labeling problem. However, this notion of two-class threat labeling is not well defined in literature. An event can have multiple aspects as it can be treated as anomalous or non-anomalous based on the situation of occurrence. Based on this argument, we propose a new paradigm of extending this two class threat labeling problem to multi-class labeling. As a solution to this multi-class labeling problem, we cluster frames with low, medium and high threat. We also propose a new feature known as pseudo-entropy for better clustering of threats. Our framework consists of two main components, namely, Earth mover distance (EMD) based anomaly detection system and multi-level threat analysis. As an outcome frame-wise and segment-wise threat representation are also presented to facilitate real time video search for relevant events. Exhaustive internal comparison and statistical analysis over benchmark UCSD and UMN dataset clearly indicates the merit of the proposed framework.</p
One hundred days: the effects of India's employment guarantee program on child work
No full textThe challenge of evaluating anti-poverty interventions in non-experimental settings lies in establishing a causal linkage between an intervention and a desired outcome. While randomized controlled trials (RCTs) are rightfully regarded as the gold standard, they are not practically or ethically feasible in all development projects. This dissertation focuses on the use of natural experiments to evaluate the intended and unintended consequences of anti-poverty interventions on children. Designed around unplanned events, natural experiments provide information comparable to RCTs, and are cost and time efficient. Article 1 summarizes the evidence from natural experiments on the effects of interventions that increase income and education. Article 2 summarizes the evidence from several natural experiments that evaluate the effects of India’s National Rural Employment Guarantee Scheme (NREGS), an employment policy. Broad findings suggest that while the policy successfully targeted poor households, and increased rural employment and wages, it had the unintended consequence of increasing child labor, and decreasing educational outcomes. Article 3 uses data from a nationally representative survey to evaluate the effects of the policy on child work. Results suggest that child and household level characteristics have a significant effect on determining child work. Further, as suggested by the literature, children living in households that worked under the policy are more likely to be engaged in work (both paid and domestic) than children living in non-participant households. While it is not possible to make causal attributions, possible explanations include unintended effects of the policy or household selection effects.Ph.D.Includes bibliographical referencesIncludes vitaby Neeta Goe
Millennium development goals (MDGS) to sustainable development goals (SDGS): Addressing unfinished agenda and strengthening sustainable development and partnership
No full textNeed to bring family to the heart of healthcare as it is home, not a hospital, where healthcare begins and ends
No full textToday the patients and their families are 'powerless' recipients of healthcare services. The healthcare services are siloed and fragmented and getting worse with an increasing array of specialists and subspecialists who “patch up” patients and send them back home. It is important for healthcare providers to become involved in the process of health promotion, prevention, and recovery. For successful implementation of this family-level care needs to be recognized and integrated into all policies, guidelines of the government, and healthcare providers reoriented through in-service and basic training
Anisotropy in Diffusion and Electrical Conductivity Distributions of TX-151 Phantoms
No full textabstract: Among electrical properties of living tissues, the differentiation of tissues or organs provided by electrical conductivity is superior. The pathological condition of living tissues is inferred from the spatial distribution of conductivity. Magnetic Resonance Electrical Impedance Tomography (MREIT) is a relatively new non-invasive conductivity imaging technique. The majority of conductivity reconstruction algorithms are suitable for isotropic conductivity distributions. However, tissues such as cardiac muscle and white matter in the brain are highly anisotropic. Until recently, the conductivity distributions of anisotropic samples were solved using isotropic conductivity reconstruction algorithms. First and second spatial derivatives of conductivity (∇σ and ∇2σ ) are integrated to obtain the conductivity distribution. Existing algorithms estimate a scalar conductivity instead of a tensor in anisotropic samples.
Accurate determination of the spatial distribution of a conductivity tensor in an anisotropic sample necessitates the development of anisotropic conductivity tensor image reconstruction techniques. Therefore, experimental studies investigating the effect of ∇2σ on degree of anisotropy is necessary. The purpose of the thesis is to compare the influence of ∇2σ on the degree of anisotropy under two different orthogonal current injection pairs.
The anisotropic property of tissues such as white matter is investigated by constructing stable TX-151 gel layer phantoms with varying degrees of anisotropy. MREIT and Diffusion Magnetic Resonance Imaging (DWI) experiments were conducted to probe the conductivity and diffusion properties of phantoms. MREIT involved current injection synchronized to a spin-echo pulse sequence. Similarities and differences in the divergence of the vector field of ∇σ (∇2σ) among anisotropic samples subjected to two different current injection pairs were studied. DWI of anisotropic phantoms involved the application of diffusion-weighted magnetic field gradients with a spin-echo pulse sequence. Eigenvalues and eigenvectors of diffusion tensors were compared to characterize diffusion properties of anisotropic phantoms.
The orientation of current injection electrode pair and degree of anisotropy influence the spatial distribution of ∇2σ. Anisotropy in conductivity is preserved in ∇2σ subjected to non-symmetric electric fields. Non-symmetry in electric field is observed in current injections parallel and perpendicular to the orientation of gel layers. The principal eigenvalue and eigenvector in the phantom with maximum anisotropy display diffusion anisotropy.Dissertation/ThesisMasters Thesis Bioengineering 201
Cytological diagnosis of typical carcinoid on bronchoscopic brush smears in an HIV-positive patient
No full textWe report a case of typical carcinoid of the lung in a 60-year-old human immunodeficiency virus (HIV)-positive man diagnosed on brush cytology smears. Bronchial carcinoids are rare tumors, accounting for 1% to 2% of all lung tumors. Although the exact incidence in HIV-infected individuals is not known, the paucity of their documentation in the literature indicates that they may be equally rare. Cytological diagnosis on brush smears is rarely documented as the tumor is covered with mucosa and cellular yield is often not good. In this case, bronchial brushings showed distinctive cytological features of typical carcinoid. The awareness of its characteristic cytological features and differential diagnosis is required for an accurate diagnosis. Clinical awareness that non-acquired immunodeficiency syndrome (AIDS)-defining cancers can also occur in HIV-infected individuals in the context of the prolonged survival in the antiretroviral era equally important. This case emphasizes the clinical importance of a broad differential diagnosis for lung lesions in HIV-positive patients
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