130 research outputs found
A Projapoti Paperback
No full textThis book may mix stories from Babbitt's 1912 and 1922 editions, titled respectively Jataka Tales and More Jataka Tales. Both were published by The Century Company and illustrated by Ellsworth Young. Simpler drawings here have been substituted for Young's work. There are twenty-one stories here. How the Turtle Saved His Own Life (23) is still wonderfully pleasing The fishes in The Three Fishes (130) are again named as in the standard Kalila and Dimna story, but the story now has to do with one fish who saves two others from a net. The covers present a human child walking in front of a baboon.Ellen C. Babbit
Learning articulated motions from visual demonstration
No full textThesis: S.M. in Computer Science and Engineering, Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2014.This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.35Cataloged from student-submitted PDF version of thesis.Includes bibliographical references (pages 94-98).Robots operating autonomously in household environments must be capable of interacting with articulated objects on a daily basis. They should be able to infer each object's underlying kinematic linkages purely by observing its motion during manipulation. This work proposes a framework that enables robots to learn the articulation in objects from user-provided demonstrations, using RGB-D sensors. We introduce algorithms that combine concepts in sparse feature tracking, motion segmentation, object pose estimation, and articulation learning, to develop our proposed framework. Additionally, our methods can predict the motion of previously seen articulated objects in future encounters. We present experiments that demonstrate the ability of our method, given RGB-D data, to identify, analyze and predict the articulation of a number of everyday objects within a human-occupied environment.by Sudeep Pillai.S.M. in Computer Science and Engineerin
Variability for growth and yield traits in single cross hybrids of maize (Zea mays L.)
No full textSaabunud / Received 29.09.2021 ; Aktsepteeritud / Accepted 18.11.2021 ; Avaldatud veebis / Published online 18.11.2021 ; Vastutav autor / Corresponding author: Jiban Shrestha [email protected] single-cross hybrids of maize were evaluated in a randomized complete block design with three replications to investigate genetic variability and correlation among growth and yield traits at Khumaltar, Lalitpur, Nepal from March 13 to September 05, 2021. The hybrids were grouped into four clusters using Euclidean Average Linkage method. The cluster analysis showed the presence of genetic variability in the evaluated hybrids. The maximum distance between cluster centroids (194.28) was found between cluster 2 and cluster 4, indicating genetic dissimilarity. Grain yield had the maximum values of phenotypic coefficient of variation (PCV) (35.02%), followed by ear height (17.82%) and plant height (12.22%). Similarly, grain yield had the maximum values of genotypic coefficient of variation (GCV) (26.24%) followed by the number of kernel rows/cob (8.77%) and days to 50% silking (8.72%). Days to 50% silking and days to 50% tasseling had the highest values of heritability (86%) followed by cob diameter (84%) and no. of kernel rows in cob (68%). The leaf area per plant had the maximum values of genetic advance (GA) (74.87 cm2), followed by plant height (27.80 cm) and days to 50% silking (9.66 days). Similarly, the maximum values of genetic advance as percent of the mean (GAM) was found for grain yield (40.50%) followed by days to 50% silking (16.70%) and days to 50% tasseling (16.17%). The hybrids namely KWM-91 × KWM-93 produced the maximum values of grain yield (9.99 t ha–1) followed by KWM-93 × KWM-91 (9.63 t ha–1) and KWM-92 × KWM-93 (9.40 t ha–1). Grain yield showed positive and significant phenotypic correlation with days to 50% silking (r = 0.41), days to 50% tasseling (r = 0.39), plant height (r = 0.37), cob diameter (r = 0.49) and the number of kernel rows in cob (r = 0.38). Therefore, utilization of present genetic variability along with indirect selection for traits having significant association with grain yield, high heritability and GAM could aid in the improvement of maize productivity
Regulation of gene expression by RNA methylation in yeast
No full textThesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Biology, 2012.This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.Cataloged from student submitted PDF version of thesis.Includes bibliographical references.The internal methylation of mRNA post-transcriptionally is an essential component of the mRNA editing machinery in virtually every eukaryotic system. Despite this ubiquity, little is known about the relevance, consequences or machinery involved in this process. The recent demonstration of this modification in the brewers' yeast, Saccharomyces cerevisiae, has allowed the study of this modification using the vast array of genetic and biochemical tools available in the organism. In the second chapter of this thesis, we show that diploid cells of the yeast Saccharomyces cerevisiae experiencing nutrient limitation undergo a restriction of cellular potential and commitment in which the cells cease vegetative, mitotic growth and commit to meiosis. We show that the period prior to commitment can be divided further into two distinct phases: an early stage of initial starvation followed by a commitment to differentiation. Cells that are in the initial starvation phase revert to yeast-form mitotic growth if shifted to nutrientrich conditions. Cells that are in the commitment to differentiation phase are incapable of returning to yeast-form growth if shifted to nutrient-rich medium, but instead synchronously engage in pseudo-hyphal budding-a nutrient foraging response. Co-ordination of meiosis and PH development in the commitment to differentiation phase is regulated by mRNA methylation. We dissect this mRNA methylation upon nutrient starvation in the third chapter of this thesis. We identify Ime4, Mum2 and Slz1 as the components of a protein complex that catalyzes mRNA methylation in yeast. These components are necessary for m⁶A accumulation during nutrient starvation; mutation of any one of these components results in defects in meiotic and PH development. Furthermore, we find that ectopic expression of these components under nutrient-rich conditions is sufficient to catalyze this methylation of mRNA. Finally, we provide evidence that this modification is necessary for the activation of translation of genes under starvation conditions. These findings provide evidence for a method of finetuning translation under nutrient-stress conditions. Together, our results support the notion that the yeast starvation response is an extended process that progressively restricts cell fate and reveal a broad role of posttranscriptional RNA methylation in regulating these decisions.by Sudeep D. Agarwala.Ph.D
Root-knot Nematode (Meloidogyne Incognita) and Its Management: a Review
No full textRoot-knot nematode (RKN) Meloidogyne incognita stands out among the most harmful polyphagous endoparasite causing serious harm to plants, and distributed all over the globe. RKN causes reduced growth, quality and yield along with reduced resistance of the host against biotic and abiotic stresses. Infective second stage juvenile enters host roots with the help of the stylet and becomes sedentary getting into the vascular cylinder. Dramatic changes occur in host cells, making a specialized feeding site, induced by the secretion of effector protein by RKN. M. incognita can be controlled by nematicides, biocontrol agents, botanicals essential oils and growing resistant cultivars. Nematicides are no longer allowed to use in many parts of the world because of environmental hazards and toxicity to humans and other organisms. Researchers are concentrating on searching suitable alternatives to nematicides for effective management of M. incognita. This review mainly tries to explain the biology of M. incognita and different management options recommended in recent years. However, an effective and economical management of M. incognita remains an immense challenge
Simultaneous Localization and Mapping- aware, self-supervised perception in mobile robots
No full textThesis: Ph. D., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2017.This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.Cataloged from student-submitted PDF version of thesis.Includes bibliographical references (pages 152-171).Simultaneous Localization and Mapping (SLAM) is a fundamental capability in mobile robots, and has been typically considered in the context of aiding mapping and navigation tasks. In this thesis, we advocate for the use of SLAM as a supervisory signal to further the perceptual capabilities in robots. Through the concept of SLAM-supported object recognition, we develop the ability for robots equipped with a single camera to be able to leverage their SLAM-awareness (via Monocular Visual-SLAM) to better inform object recognition within its immediate environment. Additionally, by maintaining a spatially-cognizant view of the world,we find our SLAM-aware approach to be particularly amenable to few-shot object learning. We show that a SLAM-aware, few-shot object learning strategy can be especially advantageous to mobile robots, and is able to learn object detectors from a reduced set of training examples. Implicit to realizing modern visual-SLAM systems is its choice of map representation. It is imperative that the map representation is crucially utilized by multiple components in the robot's decision-making stack, while it is constantly optimized as more measurements are available. Motivated by the need for a unified map representation in vision-based mapping, navigation and planning, we develop an iterative and high-performance mesh-reconstruction algorithm for stereo imagery. We envision that in the future, these tunable mesh representations can potentially enable robots to quickly reconstruct their immediate surroundings while being able to directly plan in them and maneuver at high-speeds. While most visual-SLAM front-ends explicitly encode application-specific constraints for accurate and robust operation, we advocate for an automated solution to developing these systems. By bootstrapping the robot's ability to perform GP Saided SLAM, we develop a self-supervised visual-Slam front-end capable of performing visual ego-motion, and vision-based loop-closure recognition in mobile robots. We propose a novel, generative model solution that it is able to predict ego-motion estimates from optical flow, while also allowing for the prediction of induced scene flow conditioned on the ego-motion. Following a similar bootstrapped learning strategy, we explore the ability to self-supervise place recognition in mobile robots and cast it as a metric learning problem, with a GPS-aided SLAM solution providing the relevant supervision. Furthermore, we show that the newly learned embedding can be particularly powerful in discriminating visual scene instances from each other for the purpose of loop-closure detection. We envision that such self-supervised solutions to vision-based task learning will have far-reaching implications in several domains, especially facilitating life-long learning in autonomous systems.by Sudeep Pillai.Ph. D
Root-knot nematode (Meloidogyne incognita) and its management: a review
No full textRoot-knot nematode (RKN) Meloidogyne incognita stands out among the most harmful polyphagous endoparasite causing serious harm to plants, and distributed all over the globe. RKN causes reduced growth, quality and yield along with reduced resistance of the host against biotic and abiotic stresses. Infective second stage juvenile enters host roots with the help of the stylet and becomes sedentary getting into the vascular cylinder. Dramatic changes occur in host cells, making a specialized feeding site, induced by the secretion of effector protein by RKN. M. incognita can be controlled by nematicides, biocontrol agents, botanicals essential oils and growing resistant cultivars. Nematicides are no longer allowed to use in many parts of the world because of environmental hazards and toxicity to humans and other organisms. Researchers are concentrating on searching suitable alternatives to nematicides for effective management of M. incognita. This review mainly tries to explain the biology of M. incognita and different management options recommended in recent years. However, an effective and economical management of M. incognita remains an immense challenge
Agglomeration of a model food powder
No full textThis Dissertation / Report is the outcome of investigation carried out by the creator(s) / author(s) at the department/division of Central Food Technological Research Institute (CFTRI), Mysore mentioned below in this page
Properties and Applications of Food Powders
No full textThis Dissertation / Report is the outcome of investigation carried out by the creator(s) / author(s) at the department/division of Central Food Technological Research Institute (CFTRI), Mysore mentioned below in this page
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