High-efficiency broad-bandwidth sub-wavelength grating based fibre-chip coupler in SOI

We report a comprehensive study on the performance of uniform and non-uniform based subwavelength grating couplers in Silicon-on-Insulator. The two performance metrics, coupling efficiency and bandwidth enhancement and trade-offs is presented. We also present, design parameters to achieve high-efficiency and broadband operation based on the detailed study of various loss mechanisms in the grating. Based on the detailed analysis subwavelength grating coupler designs with efficiency as high as 84 % with a 1 dB bandwidth of 50 nm and 98 % with a 44 nm 1 dB bandwidth is presented

Quantification and Analysis of Icebergs Distribution around Greenland ussing Sentinel SAR images

This presentation was given as part of the GIS Day@KU symposium on November 16, 2016. For more information about GIS Day@KU activities, please see http://gis.ku.edu/gisday/2016/.Platinum Sponsors: KU Department of Geography and Atmospheric Science. Gold Sponsors: Enertech, KU Environmental Studies Program, KU Libraries. Silver Sponsors: Douglas County, Kansas, KansasView, State of Kansas Data Access & Support Center (DASC) and the KU Center for Global and International Studies

Quantifying Iceberg Distribution in Rink Fjord using Satellite Remote Sensing

This presentation was given as part of the GIS Day@KU symposium on November 18, 2015. For more information about GIS Day@KU activities, please see http://www.gis.ku.edu/gisday/2015/.Platinum Sponsors: KU Department of Geography and Atmospheric Science; KU School of Business. Gold Sponsors: Bartlett & West; Kansas Biological Survey; KU Environmental Studies Program; KU Institute for Policy & Social Research; KU Libraries. Silver Sponsors: State of Kansas Data Access and Support Center (DASC). Bronze Sponsors: KU Center for Remote Sensing of Ice Sheets (CReSIS); TREKK Design Group, LLC; Wilson & Company, Engineers and Architects

Exploring Gender Differences in Autism-Spectrum-Related Developmental Areas in 30-Month-Olds

Autism spectrum disorder (ASD) is a group of developmental disabilities often marked by social and behavioral impairments and repetitive, stereotyped behaviors. Closely related to this disorder is the concept of an “autistic continuum,” which refers to the idea that all individuals fall along a spectrum from normally developing to autism spectrum disorder, with a person displaying increased numbers of autism-related characteristics (i.e., social and communicative impairments, etc.) the further he or she falls toward the autism spectrum disorder end of the continuum. Prior research has often found significant gender differences in autistic characteristic presence, with typically developing males tending to display more autistic characteristics than typically developing females. In this study, this comparative autistic characteristic research was extended to younger ages by investigating potential gender differences in two parent-reported measures of developmental areas closely related to the autistic continuum (social responsiveness, sociability, impulsivity, and inhibitory control) for non-diagnosed 30-month-olds. No significant gender differences were found in any of these areas, but differences in several areas were trending toward significance. These results have important implications for academic inquiry and research in the field, as well as for intervening in issues related to the social development of young male children.Bachelor of Scienc

Measuring the supply chain performance in Indian garment industry

Supply chain performance measurement is very necessary for a company, however, it is more important to identify the proper indicators based on which the performance can be evaluated. The paper benchmarks the performance measurement metrics which has been further validated by measuring the performance of garment companies in India. The analysis provides the importance of inventory turnover (ITR) and cash to cash cycle period (CCC) in supply chain performance measurement. The study also develops a relationship between CCC and ITR especially in the garment industry by considering the Indian context. DOI: 10.17762/ijritcc2321-8169.150313

Power Quality Improvement in 3 – Phase System Using Shunt Active Filter

Voltage, current and frequency are the three physical characteristics that mostly define the power quality and a power quality issue is defined as “any occurrence manifested in current, voltage, or frequency deviations that results in damage, upset or failure of end-use equipments”. The higher switching frequency and the non-linearity in the properties of the power electronics devices are mostly responsible for the power quality issue. So importance is being given to the development of Active Power Filters to solve these problems to improve power quality among which shunt active power filter is used to eliminate voltage and load current harmonics and for reactive power compensation. The shunt active power filters have been developed based on control strategies like instantaneous active and reactive power compensation scheme (p-q control) and instantaneous active and reactive current scheme (Id-Iq control). Considering its superior nature, a study on the Id-Iq control scheme based shunt active filter is brought out in this project. The compensation is carried out by the use of PI based controllers. A theoretical study based on both the compensation schemes is done in this project and then the theory of Id-Iq control scheme is implemented in simulation work and its harmonic compensation results are analyzed

Assessment of ice mélange impacts on tidewater glacier dynamics using high resolution ICEYE imagery

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Correlation of clinical examination, ultrasound, magnetic resonance imaging and arthroscopy as diagnostic tools in shoulder pathology

Background: Shoulder pathologies can cause significant pain, discomfort, and affect the activity of daily living. The aim of this study was to compare the efficacy of clinical examination, ultrasound, magnetic resonance imaging (MRI) with shoulder arthroscopy in diagnosing various shoulder pathologies, considering shoulder arthroscopy as the gold standard tool.Methods: This was a prospective, comparative study conducted over 35 patients, between 18-75 years of age presenting with chronic shoulder pain or instability of more than 2 months duration. All patients were examined clinically, followed by high resolution ultrasound, MRI, arthroscopy of the affected shoulder.Results: The sensitivity and specificity of ultrasonography (USG) for diagnosing full thickness tear was 100% each and for MRI was 88% and 100% respectively. For subacromial impingement USG had sensitivity of 66.67%, specificity of 94.12%, positive predictive value of 50% and negative predictive value of 88.89%. For rotator cuff tear USG had sensitivity of 92.86%, specificity of 50%, positive predictive value of 81.25% and negative predictive value of 75% considering shoulder arthroscopy as gold standard.Conclusions: USG and MRI both are sensitive techniques for diagnosing of rotator cuff pathologies. USG has high accuracy in diagnosing partial thickness tears as compare to MRI. MRI proved to be superior in estimation of site and extent of tear. Considering shoulder arthroscopy as gold standard, it can be reserved for patients with suspicious of USG/MRI findings or those who may need surgical intervention simultaneously

Observing iceberg size distributions and implications for calving processes

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Significant contribution of small icebergs to the freshwater budget in Greenland fjords

This work is licensed under a Creative Commons Attribution 4.0 International License.Icebergs represent nearly half of the mass loss from the Greenland Ice Sheet and provide a distributed source of freshwater along fjords which can alter fjord circulation, nutrient levels, and ultimately the Meridional Overturning Circulation. Here we present analyses of high resolution optical satellite imagery using convolutional neural networks to accurately delineate iceberg edges in two East Greenland fjords. We find that a significant portion of icebergs in fjords are comprised of small icebergs that were not detected in previously-available coarser resolution satellite images. We show that the preponderance of small icebergs results in high freshwater delivery, as well as a short life span of icebergs in fjords. We conclude that an inability to identify small icebergs leads to inaccurate frequency-size distribution of icebergs in Greenland fjords, an underestimation of iceberg area (specifically for small icebergs), and an overestimation of iceberg life span.NASA grant NNX16AJ90GNSF grant PLR-154353