3,121 research outputs found
Sweet pepper pose detection and grasping for automated crop harvesting
No full textThis paper presents a method for estimating the\ud
6DOF pose of sweet-pepper (capsicum) crops for autonomous\ud
harvesting via a robotic manipulator. The method uses the\ud
Kinect Fusion algorithm to robustly fuse RGB-D data from\ud
an eye-in-hand camera combined with a colour segmentation\ud
and clustering step to extract an accurate representation of the crop. The 6DOF pose of the sweet peppers is then estimated via a nonlinear least squares optimisation by fitting a superellipsoid to the segmented sweet pepper. The performance of the method is demonstrated on a real 6DOF manipulator with a custom gripper. The method is shown to estimate the 6DOF pose successfully enabling the manipulator to grasp sweet peppers for a range of different orientations. The results obtained improve largely on the performance of grasping when compared\ud
to a naive approach, which does not estimate the orientation of the crop
James M. Sweet Correspondence
No full textEntries include a typed introductory letter to Sweet about the Maine Author Collection from the Maine State Library, a typed letter of presentation from Sweet, a typed biography Facts About Me concerning his published works, collecting used sets of encyclopedias, the supernatural, and poetic correspondence with U.S. soldiers in Vietnam, and a typed composition with reference to gospel tracts, songs, and a diary written by Sweet, in response to film and theater productions of A Streetcar Named Desire
Come Again, Sweet Love | 16-96810
No full textCome Again, Sweet Love Doth Now Invite
Part Number: 16-96810
Price: $1.75
Voicing: SAB
Music By: John Downland
Arranged By: Christopher Matthews
a cappella
Featured at:2014 USM Summer Reading Sessionhttps://digitalcommons.butler.edu/jca_scores/1290/thumbnail.jp
Rambutans a sweet success
No full texttag=1 data=Rambutans a sweet success
tag=2 data=Taylor, Christopher
tag=3 data=Territory Harvest
tag=4 data=2
tag=5 data=3
tag=6 data=November 1990/February 1992
tag=7 data=12-14.
tag=8 data=FRUIT
tag=9 data=RAMBUTANS
tag=13 data=IND
tag=32 data=LIM, T.K
Sweet taste and nutrient value subdivide rewarding dopaminergic neurons in Drosophila
No full textCo-author Christopher J. Burke is a doctoral student in the Neuroscience Program in the Morningside Graduate School of Biomedical Sciences (GSBS) at UMass Medical School.Dopaminergic neurons provide reward learning signals in mammals and insects [1-4]. Recent work in Drosophila has demonstrated that water-reinforcing dopaminergic neurons are different to those for nutritious sugars [5]. Here, we tested whether the sweet taste and nutrient properties of sugar reinforcement further subdivide the fly reward system. We found that dopaminergic neurons expressing the OAMB octopamine receptor [6] specifically convey the short-term reinforcing effects of sweet taste [4]. These dopaminergic neurons project to the beta'2 and gamma4 regions of the mushroom body lobes. In contrast, nutrient-dependent long-term memory requires different dopaminergic neurons that project to the gamma5b regions, and it can be artificially reinforced by those projecting to the beta lobe and adjacent alpha1 region. Surprisingly, whereas artificial implantation and expression of short-term memory occur in satiated flies, formation and expression of artificial long-term memory require flies to be hungry. These studies suggest that short-term and long-term sugar memories have different physiological constraints. They also demonstrate further functional heterogeneity within the rewarding dopaminergic neuron population.Neuroscienc
Peduncle detection of sweet pepper for autonomous crop harvesting: Combined colour and 3D information
No full textThis paper presents a 3D visual detection method for the challenging task of detecting peduncles of sweet peppers (Capsicum annuum) in the field. Cutting the peduncle cleanly is one of the most difficult stages of the harvesting process, where the peduncle is the part of the crop that attaches it to the main stem of the plant. Accurate peduncle detection in 3D space is therefore a vital step in reliable autonomous harvesting of sweet peppers, as this can lead to precise cutting while avoiding damage to the surrounding plant. This paper makes use of both colour and geometry information acquired from an RGB-D sensor and utilises a supervised-learning approach for the peduncle detection task. The performance of the proposed method is demonstrated and evaluated using qualitative and quantitative results (the Area-Under-the-Curve (AUC) of the detection precision-recall curve). We are able to achieve an AUC of 0.71 for peduncle detection on field-grown sweet peppers. We release a set of manually annotated 3D sweet pepper and peduncle images to assist the research community in performing further research on this topic
Surface impoundment assessment for the State of Oregon: report to the Environmental Protection Agency
No full textThis archived document is maintained by the Oregon State Library as part of the Oregon Documents Depository Program. It is for informational purposes and may not be suitable for legal purposes.Title from cover."The Environmental Protection Agency (EPA) undertook the nationwide Surface Impoundment Assessment (SIA) in order to locate and assess natual or man-made pits, ponds, or lagoons whose intended purpose the treatment, storage and/or disposal of liquid waste. An evaluation of potential ground-water contamination was the primary goal"--Page 1-1.Includes bibliographical references."The SIA progam in Oregon was conducted by Sweet, Edwards and Associates under contract to Oregon Department of Environmental Quality".Mode of access: Internet from the Oregon Government Publications Collection.Text in English
What makes a cherry red?: an investigation into flavonoid pathway regulation in sweet cherry (Prunus avium L.) fruit.
No full textColour is an important fruit quality indicator because many consumers make their selections based primarily on this trait. Inheritance of colour has been studied within sweet cherry (Prunus avium L.) populations and as a result fruit colour is thought to be determined by three genetic factors. A flesh colour factor (F) and the major skin colour factor (A) are the main determinants of fruit colour, where red pigmentation is incompletely dominant over yellow. A third factor, the minor skin colour factor (B), can produce blush skin but is epistatically masked by a dominant A allele. The pigments that colour fruit are known as anthocyanins, synthesised via the transcriptionally regulated flavonoid pathway, which also synthesizes the related secondary metabolites, condensed tannins and flavonols. In other fruit and flower species, mutations in flavonoid pathway or regulatory genes can lead to non-functional alleles that explain the inheritance of colour. However the genes encoding the genetic colour factors are not known in sweet cherry. Therefore, this research has endeavoured to study the cherry flavonoid pathway and its transcriptional regulation, with a view to determining the genetic differences responsible for yellow, blush, red and black cultivars. To achieve this aim, genes encoding flavonoid pathway enzymes and putative regulators of flavonoid synthesis were isolated from the red sweet cherry cultivar ‘Lapins’. PaMYBA1, an R2R3-MYB factor, possessing a high degree of sequence similarity with characterised anthocyanin regulators and conserved C-terminal motifs common within this type of protein, was identified. Functional characterisation of PaMYBA1 demonstrated its ability to activate transcription from the promoters of chalcone synthase (MdCHS), which encodes an enzyme that performs the first committed step in the synthesis of flavonoids, and the anthocyanin biosynthetic gene UDP-glycosyl:flavonoid-3-O-glycosyltransferase (MdUFGT). Furthermore, correlation between anthocyanin accumulation and the expression profile of PaMYBA1 in developing ‘Lapins’ fruit and light-treated blush-skinned ‘Ranier’ fruit suggest that PaMYBA1 might be an important colour factor. Transcript analysis revealed that PaMYBA1 is necessary for the production of colour in cherries; PaMYBA1 is not expressed in the solid yellow fruit of ‘Yellow Glass’ that lacks anthocyanins. However, similar levels of expression of PaMYBA1 in blush, red and black sweet cherry fruit indicate that there are additional factors that contribute to differences in colour intensity. The intense colour and increased flavonoid levels of the black sweet cherry ‘Sam’, compared with the blush and red fruits tested, correlated with a large increase in the expression of the putative tannin regulator PaMYBPA1 in this cultivar. In a functional assay, PaMYBPA1 could trans-activate not only the promoters of the tannin genes anthocyanidin reductase (VvANR) and leucaonthocyanidin reductase (VvLAR), but also of MdCHS and MdUFGT. Therefore, it is possible that PaMYBPA1 could regulate both tannin and anthocyanin synthesis, particularly when expressed at high levels. Taking into consideration the expression of flavonoid pathway genes in different sweet cherry cultivars and tissues, and under different environmental conditions, together with published scientific observations of the genetic factors contributing to fruit colour, we have developed a working model for flavonoid pathway regulation in sweet cherry fruit. Aspects of the model remain to be determined, such as the involvement of two additional anthocyanin-type MYB factors PaMYBA2 and PaMYBA3 in fruit pigmentation. However, it provides a general understanding of differences in the activity of the flavonoid pathway between sweet cherry cultivars, and moves us closer to knowing the identity of the inherited factors that determine skin and flesh colour in sweet cherry fruit.Thesis (Ph.D) -- University of Adelaide, School of Agriculture, Food and Wine, 201
Connecting
No full textJoAnne Katzmarek—Thoughts Like Flying Grouse
Steven L. VanderStaay—I\u27m With You, Huck
Irwin Ramirez Leopando—A Moment of Connections
Christopher Sweet—The Brightening Glance
Howard Wolf—Personal Teachin
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