26 research outputs found
Supplemental video 1 and video 2 to preprint article: Surface acoustic wave integrated microfluidics for repetitive and reversible temporary immobilization of C. elegans
No full textNo audio.The ZIP file contains two supplemental videos to the preprint article: BIORXIV/2022/496864; Surface Acoustic Wave Integrated Microfluidics for Repetitive and Reversible Temporary Immobilization of C. elegans by Nakul Sridhar, Apresio Kefin Fajrial, Rachel L. Doser, Frederic L. Hoerndli, and Xiaoyun Ding
Changes in pollution board undermine accountability
Get PDFIn a surprise move, the Government of Karnataka drastically altered recently the distribution of authority within the Karnataka State Pollution Control Board (KSPCB), the sole environmental regulator in the state. After having appointed a new chairman a few months ago, the government has now amended the rules to give most day-to-day powers to the member-secretary
Explicit stochastic schemes for transport in particle-resolved simulations
Get PDFSubmission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2018-08-01The student, Nakul Nuwal, accepted the attached license on 2016-07-20 at 14:01.The student, Nakul Nuwal, submitted this Thesis for approval on 2016-07-20 at 14:18.This Thesis was approved for publication on 2016-07-21 at 13:31.DSpace SAF Submission Ingestion Package generated from Vireo submission #10017 on 2016-11-10 at 12:27:18Made available in DSpace on 2016-11-10T18:35:31Z (GMT). No. of bitstreams: 10
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Previous issue date: 2016-07-21Stochastic particle-resolved methods are a recent development in atmospheric aerosol modeling. These methods resolve individual aerosol particles to track the information of their composition during a numerical simulation. This enables the detailed analysis of aerosol and gas-phase chemistry, and allows for a more accurate estimate of the aerosol impact on human health and Earth's climate. Transport of all particles in a finite-volume framework can be represented as a stochastic model with each particle having a probability to commute between neighboring grid-cells. This work develops and illustrates the stochastic particle-resolved transport method, which can be used for aerosol transport in atmosphere. The development of the stochastic model was inspired by the passive scalar transport in a predefined velocity field. The model was developed by splitting the transport process into advection and diffusion, and combining them with superposition. Single time-step explicit advection schemes and a Range-kutta numerical scheme were compared to the deterministic advection equation solutions and analytical solutions. The analysis also includes the stochastic modeling of the diffusion process and its results compared to analytical solution. For all cases, a quantification of total error and a numerical convergence analysis is presented.Embargo set by: Seth Robbins for item 95391
Lift date: 2018-11-10T18:35:44Z
Reason: Author requested U of Illinois access only (OA after 2yrs) in Vireo ETD systemEmbargo set by: Seth Robbins for item 95391
Lift date: 2018-11-10T18:37:47Z
Reason: Author requested U of Illinois access only (OA after 2yrs) in Vireo ETD systemEmbargo set by: Seth Robbins for item 95391
Lift date: 2018-11-10T18:39:22Z
Reason: Author requested U of Illinois access only (OA after 2yrs) in Vireo ETD systemEmbargo set by: Seth Robbins for item 95391
Lift date: 2018-11-10T18:43:22Z
Reason: Author requested U of Illinois access only (OA after 2yrs) in Vireo ETD systemU of I Only Restriction Lifted for Item 95391 on 2018-11-11T10:15:28Z
BWSSB's wrong approach
Get PDFBengaluru’s wastewater woes—stinking rivers, fish kills, and froth and fire on lake spillways—have attracted global attention. This notoriety has triggered various policy responses. Mandating large apartment and commercial buildings to treat and reuse their wastewater has been one such response. Scarcity of fresh water lends support to this idea as wastewater reuse can reduce freshwater demand as well
Apartments struggle with 'manage your own sewage' rule
Get PDFBengaluru's bruhath problem with sewage is notoriously well known, with pictures of foaming lakes and fish kills attracting global media attention. But what is less well known is the fact that this city has the highest number of apartment-scale sewage treatment plants (STPs) in the country
Trapezoid fractures: report of 11 cases.
No full textAuthor(s) Pre or Post Print Version OnlyPURPOSE: Trapezoid fractures are rare. Mostly single cases reports appear in the literature. The purpose of this study was to review 11 patients treated for trapezoid fractures at our center. METHODS: We reviewed all trapezoid fractures that presented over the past 10 years at our institution. We reviewed case notes regarding mechanism of injury, fracture pattern, mode of diagnosis, and time to diagnosis and treatment. RESULTS: We treated 11 patients for trapezoid fractures over the 10-year period. A correct diagnosis was made in 5 cases on initial evaluation. Most trapezoid fractures were diagnosed on computed tomographic scan. The fracture plane was predominantly sagittal. Coronal fractures could not be diagnosed on plain radiographs. CONCLUSIONS: Fractures of the trapezoid should be suspected from the mechanism of injury, in particular, axial force, and from local tenderness. These fractures may be underdiagnosed. We recommend computed tomography rather than plain radiography alone in case of clinical suspicion. TYPE OF STUDY/LEVEL OF EVIDENCE: Diagnostic IV
Situational Analysis of Current Monitoring Systems for Eco-restoration (Soil Restoration and Water Resource Development) Projects in Agro-ecological Landscapes
No full textSociety for Promoting Participative Ecosystem Management (SOPPECOM) is a non-profit, non-governmental organisation based in Pune, India, working in the area of natural resources management, primarily in rural areas. The organisation is committed to the principles of sustainable and rational use of natural resources, equity, and social justice in the distribution of benefits, especially to disadvantaged groups like Dalits, the landless, and women. As an organisation committed to these principles, SOPPECOM extends its support to grassroots groups working on NRM issues through training, resource literacy, participatory planning, research, and policy advocacy.
TMG Research gGmbH is a Berlin-based research organisation working on sustainability issues in the areas of sustainable management and responsible governance of land and oceans, food systems, and climate. As an organisation, TMG brings sound knowledge and practical experience in facilitating national, European, and international processes and is dedicated to the analysis and solution of new and complex challenges. The following study commissioned to SOPPECOM by the TMG Research group is a part of the SEWOH lab project. The purpose of the SEWOH lab project is to analyse the linkages between digital and social innovations for achieving Sustainable Development Goal 2, and especially to understand the potential of digital solutions for inclusive rural and agricultural development in sub-Saharan Africa and India.
Within this larger project, SOPPECOM conducted the study under the Ecosystem Restoration Workstream: “Digital Tools to Cover the Last Mile in Restoration Monitoring.” The study focussed on two distinct work packages – i) Situational Analysis of current monitoring systems:To understand existing tools (digital or otherwise) for monitoring and impact assessment of SOC and soil health resulting from agricultural and farm management practices; ii) Scoping study on the monitoring, verification, and reporting in ecosystem landscape restoration: To assess, how the implementation of programmes and projects in the field of ecosystem restoration is reported to the state and national level in India.
This report, “Situational Analysis of Current Monitoring Systems for Eco-restoration (Soil Restoration and Water Resource
Development): Projects in Agro-ecological Landscapes” presented below is the synthesis of the research work done under work package one as mentioned above. The study was done for five months from February to June 202
Digital Fountain for Multi-node Aggregation of Data in Blockchains
Get PDFabstract: Blockchain scalability is one of the issues that concerns its current adopters. The current popular blockchains have initially been designed with imperfections that in- troduce fundamental bottlenecks which limit their ability to have a higher throughput and a lower latency.
One of the major bottlenecks for existing blockchain technologies is fast block propagation. A faster block propagation enables a miner to reach a majority of the network within a time constraint and therefore leading to a lower orphan rate and better profitability. In order to attain a throughput that could compete with the current state of the art transaction processing, while also keeping the block intervals same as today, a 24.3 Gigabyte block will be required every 10 minutes with an average transaction size of 500 bytes, which translates to 48600000 transactions every 10 minutes or about 81000 transactions per second.
In order to synchronize such large blocks faster across the network while maintain- ing consensus by keeping the orphan rate below 50%, the thesis proposes to aggregate partial block data from multiple nodes using digital fountain codes. The advantages of using a fountain code is that all connected peers can send part of data in an encoded form. When the receiving peer has enough data, it then decodes the information to reconstruct the block. Along with them sending only part information, the data can be relayed over UDP, instead of TCP, improving upon the speed of propagation in the current blockchains. Fountain codes applied in this research are Raptor codes, which allow construction of infinite decoding symbols. The research, when applied to blockchains, increases success rate of block delivery on decode failures.Dissertation/ThesisMasters Thesis Computer Science 201
Development of Micro-Computed Tomography Data Based Simulation Technique For Deformation and Strain Measurement of Densely Packed Electronics
Get PDFRising pace of innovation and continuously increasing investments in research and developments has resulted in higher value added to each electronics equipment around us. This has also resulted in massive rise in demand in each segment of this industry. As of 2018, the semiconductor industry is the largest sector in the world, worth 574.5 billion in 2018 to 47.73 billion in 2018 to $50.54 billion in 2019. A large part of this budget is annually allocated behind the research, development and procurement of missile or missile related technologies.
Constant efforts are made to maximize the life of the electronics used in the missiles and study the Remaining Useful Life of these electronics to improve the cost efficiency of the missile program. Improvements in maximizing the life of electronics or the remaining useful life, requires understanding of the current in-situ condition of the electronics used in these systems. This requires researchers be able to quantify and analyze the amount of deformations the small electrical sub-assemblies inside the systems may observe over its service life. This data can then be used to predict the failure or analyze the extent of damage to predict and quantify its performance over its remaining life.
The existing popular methods used by the US Missile Command involves destructive testing of statistically representative selected samples of missile electronics which results in significant expensive. As per the Stockpile Recovery Program launched in 2015, performing simulations in of (mathematical models) has been cited as one of the ways to reduce the cost per unit of each missile and thus gain much required cost efficiency. This dissertation is thus on the development of non- destructive, non-invasive simulation and experimental techniques to quantify the deformation and strain occurring on the inside of the fuze electronics used in missile systems.
In this study the Author has used micro-computed tomography (micro-CT) data to make Finite Element models of a comprehensive fuze assembly and used the same micro-CT data to make experimental deformation measurements using a technique called Digital Volume Correlation.
Over the life cycle of a missile, the missile electronics are subjected to two categories of loading scenarios. One at the time of manufacturing and storage and other, during its service life. During manufacturing and storage, the electrical assemblies are subjected residual stresses left by the curing of potting thermoset resins or underfills and long hours of thermal aging during storage. During the service life, high-g and low-g mechanical shocks, vibration and sudden temperature changes are the most common forms of loading experienced by missile electronics. In order to protect the electrical assemblies and components from these mechanical and thermal loads, they are often potted within thermoset adhesives. This design further makes the strain and deformation quantification more challenging as the electrical components and assemblies are hidden from the line of sight.
While current methods involve experimentation and testing on a sample set at intermittent stages during the life cycle of a missile, these methods are often destructive in nature. This study is based on use of micro-CT scan data to measure deformations and strains occurring on these electrical components, hidden from the line of sight due to protective adhesives. This is done using Finite element models (simulation technique) and use of micro-CT scan data based Digital Volume Correlation (experimental technique).
Conventional FE modeling approach is found to be prohibitively time consuming for modeling densely packed electrical assemblies. CAD modeling, assembly and meshing of numerous electrical components, big and small, with varied different material models is found to be the bottle neck and thus little to no literature exists on doing FE modeling of comprehensive fuze assemblies. This work involves development of a novel FE modeling strategy using micro-CT data to overcome the problem. An application of this technique would be to perform FE simulations of any field extracted electrical assemblies at any stage of its service life.
Digital Volume Correlation is a technique analogous to Digital Image Correlation for computing deformations and strains in a non-contact manner utilizing the voxel/pixel intensity data. This study reports on use of this technique to experimentally monitor the physical integrity of the electrical components by comparing two micro-CT scans and computing deformations and strains the components would have experienced over a particular time frame. A further application of this technique is explored by quantifying damage progression in the electronics as a function of time over the entire 3D domain on the assembly.
Chapter 1 gives a detailed introduction and literature review on the relevant topics. Chapter 2 denotes a brief introduction to X-ray micro-CT systems, micro-CT data and its usability. A detailed account of the simulation and experimental technique is given in Chapter 3. Chapter 3 also enlists case studies done to explore the capabilities of the technique developed. Chapter 4 and 5 are based on applications of the technique developed to investigate effect of voids in solder joints found in a popular electronic packaging in the present-day consumer electronics followed by Conclusions and Discussion in Chapter 6 and 7
Feedback Error Learning for Rhythmic Motor Primitives
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