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RISS 인기검색어
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- 저자 : Anthony Oliver (검색결과 4 건)
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Development of an Autonomous Hand Tractor Platform for Philippine Agricultural Operations
Anthony James Bautista,Samuel Oliver Wane,Fredrick Nario,John Lester Torres,Tedheus Eigyef Danao 제어로봇시스템학회 2018 제어로봇시스템학회 국제학술대회 논문집 Vol.2018 No.10
The growing population, low level of mechanization, and climate change puts major constraints onto food production in Philippines’ agriculture. Aside from these, the younger generation are not choosing farming as a career, thus, there is a shortage of labour for farm work. These challenges therefore require innovative and practical solutions. Autonomous navigation as applied in agriculture plays a key role in the advancement of agricultural machineries. Development of agricultural robots became more accessible because of the availability of open source software and hardware. The objective of the research is to develop a platform for autonomous navigation by modifying a walking tractor. Arduino Mega 2560 was used as the main microcontroller and readily available GPS and compass module were used as navigation sensors. Waypoint following test and heading performance test were performed and the results show that the robot can navigate successfully with an inaccuracy of 2 meters from the desired path and a 4 degree RMS heading error was also recorded at a speed of 0.15 m/s. The results from this study can be used as a basis in developing simple autonomous robots which does not require high navigation accuracy such as delivering and carrying loads around the farm.
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Late quaternary fluvial incision and aggradation in the Lesser Himalaya, India
Dosseto, Anthony,May, Jan-Hendrik,Choi, Jeong-Heon,Swander, Zachary J.,Fink, David,Korup, Oliver,Hesse, Paul,Singh, Tejpal,Mifsud, Charles,Srivastava, Pradeep Elsevier 2018 Quaternary science reviews Vol.197 No.-
<P><B>Abstract</B></P> <P>Reconstructing how rivers respond to changes in runoff or sediment supply by incising or aggrading has been pivotal in gauging the role of the Indian Summer Monsoon (ISM) as a geomorphic driver in the Himalayas. Here we present new chronological data for fluvial aggradation and incision from the Donga alluvial fan and the upper Alaknanda River, as well as a compilation of previous work. In addition to conventional OSL-SAR (Single-Aliquot Regenerative-Dose) dating method, we have tested and applied pulsed OSL (POSL) dating for quartz samples that include K-rich feldspar inclusions, which is expected to improve the applicability and validity of OSL ages in the Lesser Himalaya. For previously dated deposits, our OSL ages are shown to be systematically older than previously reported ages. These results suggest periods of aggradation in the Alaknanda and Dehradun Valleys mainly between ∼25 and 35 ka. This most likely reflects decreased stream power during periods of weakened monsoon. In addition, in-situ cosmogenic beryllium-10 was used to infer bedrock surface exposure ages, which are interpreted as episodes of active fluvial erosion. Resulting exposure ages span from 3 to 6 ka, suggesting that strath terraces were exposed relatively recently, and incision was dominant through most of the Holocene. In combination, our results support precipitation-driven fluvial dynamics, which regulates the balance between stream power and sediment supply. On a larger spatial scale, however, fluvial dynamics are probably not spatially homogeneous as aggradation could have been taking place in adjacent catchments while incision dominated in the study area.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Himalayan fluvial history is investigated by establishing a chronology of incision and aggradation. </LI> <LI> We dated alluvial fills using POSL and strath terraces with in-situ cosmogenic beryllium-10. </LI> <LI> Aggradation took place between ∼25 and 35 ka, reflecting decreased stream power during periods of weakened monsoon. </LI> <LI> Bedrock exposure ages span from 3 to 6 ka, suggesting that incision was dominant through most of the Holocene. </LI> <LI> Fluvial dynamics is mainly precipitation-driven, which regulates the balance between stream power and sediment supply. </LI> </UL> </P>
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Identification of PlexinD1 and AHDC1 as a putative interactors for Tip-1 protein
Manal Aly Shalaby,Lynne Hampson,Anthony Oliver,Ian Hampson 한국유전학회 2011 Genes & Genomics Vol.33 No.4
The class 1 PDZ domain Tip-1 protein was first identified as a binding partner for the Human T-Cell Leukaemia Virus type 1 (HTLV-1) Tax oncoprotein. It was later shown to interact with: the RhoA signaling effector Rhotekin, the Wnt signaling effector β-catenin and the E6 oncoprotein from high-risk HPV16 but not low-risk HPV6. These observations suggested that Tip-1 may be an important “hub” protein that is involved in pathways with a proven link to carcinogenesis. Based on these findings, it was decided to further characterize the cellular role of Tip-1 by carrying out a yeast two-hybrid screen to identify new binding partners in order to uncover potentially novel functions of this protein. This identified an intracellular fragment of the trans-membrane receptor plexin D1 and a C-terminal fragment of the AT hook DNA binding containing 1 (AHDC1) protein which had a carboxyl terminal PDZ binding domain consensus sequence. Both of these interactions were confirmed by yeast mating assay which was also used to show that mutant constructs of AHDC1 lacking the carboxyl PDZ binding site did not bind Tip-1. Immunofluorescent imaging of these proteins in HPV16 E6 expressing human C33A cervical carcinoma cells suggested they may co-localize.
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Maag, Roman,Northrop, Brian H.,Butterfield, Anna,Linden, Anthony,Zerbe, Oliver,Lee, Young Min,Chi, Ki-Whan,Stang, Peter J.,Siegel, Jay S. Royal Society of Chemistry 2009 Organic & biomolecular chemistry Vol.7 No.23
<P>The synthesis and characterization of two direct platinum (1 and 6a/b) and three ethynyl-platinum corannulene derivatives (2, 8 and 9), bearing 2, 4, or 5 square planar platinum centers, are presented. The structure of the bowl bearing substituents remains comparable to corannulene and the dynamic behavior of the bowl inversion as assessed by VT NMR supports a persistent bowl structure in solution. These platinum-corannulenes are well-structured tectons for the future assembly of coordination Platonic polyhedra.</P> <P>Graphic Abstract</P><P>Direct platination of chloro and TMSethynyl corannulenes leads to new supramolecular tectons. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=b916020e'> </P>
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