Development of Oxidation Resistant Coatings on GRCop-84 Substrates by Cold Spray Process

GRCop-84, a Cu-CR-Nb alloy, has been developed for rocket engine liner applications. For maximum life additional oxidation protection is required to prevent blanching. NiCrAlY was identified as a suitable coating, and efforts were initiated to develop suitable coating techniques. Cold spray is one technique under consideration. Efforts at ASB Industries to produce dense, adherent coatings are detailed. The work culminated in the production of samples for testing at NASA Glenn Research Center

Weakly Supervised Localization using Deep Feature Maps

Object localization is an important computer vision problem with a variety of applications. The lack of large scale object-level annotations and the relative abundance of image-level labels makes a compelling case for weak supervision in the object localization task. Deep Convolutional Neural Networks are a class of state-of-the-art methods for the related problem of object recognition. In this paper, we describe a novel object localization algorithm which uses classification networks trained on only image labels. This weakly supervised method leverages local spatial and semantic patterns captured in the convolutional layers of classification networks. We propose an efficient beam search based approach to detect and localize multiple objects in images. The proposed method significantly outperforms the state-of-the-art in standard object localization data-sets with a 8 point increase in mAP scores

Search Tracker: Human-derived object tracking in-the-wild through large-scale search and retrieval

Humans use context and scene knowledge to easily localize moving objects in conditions of complex illumination changes, scene clutter and occlusions. In this paper, we present a method to leverage human knowledge in the form of annotated video libraries in a novel search and retrieval based setting to track objects in unseen video sequences. For every video sequence, a document that represents motion information is generated. Documents of the unseen video are queried against the library at multiple scales to find videos with similar motion characteristics. This provides us with coarse localization of objects in the unseen video. We further adapt these retrieved object locations to the new video using an efficient warping scheme. The proposed method is validated on in-the-wild video surveillance datasets where we outperform state-of-the-art appearance-based trackers. We also introduce a new challenging dataset with complex object appearance changes.Comment: Under review with the IEEE Transactions on Circuits and Systems for Video Technolog

Outlining International English language proficiency tests: A survey-based study on its need, purpose and scope in the backdrop of Migration

English as an international language and its proficiency is a gateway for Career, Education and Migration. In order to ensure the same, there are many international English language tests are conducted by different organizations worldwide. Their results and score are considered as a mandatory eligibility criterion for job, education and migration by different organizations and institutions. All these tests are primarily testing the ability of a candidate in the four skills of English Language. This article refers various international English language proficiency tests, its features, question and scoring pattern. The commonly used tests are IELTS, TOEFL, Duolingo English Test, OET, CPE (C2 Proficiency), CAE (C1 Advanced), PTE (Pearson Test of English Academic), TOEIC, iTEP, CELPIP, CAEL, MTELP. It also describes how these tests are differ each other in purpose and patten. The researcher conducted a short survey among UG freshers to analyze their awareness and confidence in English language proficiency tests. The results show that many of the UG learners wish to migrate to foreign countries for higher studies but they don’t have enough awareness regarding the proficiency tests. One of the predominant problems for many non-native speakers of English to secure a good job and failed to be recognized and rewarded in accordance with their skill, is the inefficiency to use English language. Therefore, coaching centers for these tests and its rigorous preparation is a lucrative business in non-European countries especially in a scenario where migration is encouraged. Often, the lack of awareness about these tests and its purpose will mislead the test takers. It is also important to choose the right test as per the field and purpose as the scores of the test