11,908 research outputs found
FlyLimbTracker: An active contour based approach for leg segment tracking in unmarked, freely behaving Drosophila.
Understanding the biological underpinnings of movement and action requires the development of tools for quantitative measurements of animal behavior. Drosophila melanogaster provides an ideal model for developing such tools: the fly has unparalleled genetic accessibility and depends on a relatively compact nervous system to generate sophisticated limbed behaviors including walking, reaching, grooming, courtship, and boxing. Here we describe a method that uses active contours to semi-automatically track body and leg segments from video image sequences of unmarked, freely behaving D. melanogaster. We show that this approach yields a more than 6-fold reduction in user intervention when compared with fully manual annotation and can be used to annotate videos with low spatial or temporal resolution for a variety of locomotor and grooming behaviors. FlyLimbTracker, the software implementation of this method, is open-source and our approach is generalizable. This opens up the possibility of tracking leg movements in other species by modifications of underlying active contour models
Grain levels in English path curvature descriptions and accompanying iconic gestures
This paper confirms that the English verb system (similar to the Finnish, Dutch and Bulgarian verb systems [22], [17]) represents path curvature at three different grain levels: neutral path curvature, global path curvature and local path curvature. We show that the three-grain-level hypothesis makes it possible to formulate constraints on English sentence structure and makes it possible to define constructions in English that refer to path curvature. We furthermore demonstrate in an experiment that the proposed English lexicalization pattern regarding path curvature in tandem with the spatial information shown to English speakers correctly predicts their packaging of grain levels in iconic gestures. We conclude that the data studied confirm Nikanne and Van der Zeeâs *22] three-grain-level hypothesis in relation to English and Kita and ĂzyĂźrekâs [11] Interface Hypothesis in relation to gesture production
ImageNet Large Scale Visual Recognition Challenge
The ImageNet Large Scale Visual Recognition Challenge is a benchmark in
object category classification and detection on hundreds of object categories
and millions of images. The challenge has been run annually from 2010 to
present, attracting participation from more than fifty institutions.
This paper describes the creation of this benchmark dataset and the advances
in object recognition that have been possible as a result. We discuss the
challenges of collecting large-scale ground truth annotation, highlight key
breakthroughs in categorical object recognition, provide a detailed analysis of
the current state of the field of large-scale image classification and object
detection, and compare the state-of-the-art computer vision accuracy with human
accuracy. We conclude with lessons learned in the five years of the challenge,
and propose future directions and improvements.Comment: 43 pages, 16 figures. v3 includes additional comparisons with PASCAL
VOC (per-category comparisons in Table 3, distribution of localization
difficulty in Fig 16), a list of queries used for obtaining object detection
images (Appendix C), and some additional reference
Thematic Approach to Teaching Science in Kindergarten for Use with First and Second Language Students
Thematic Science units were established for the Wapato kindergarten in both Spanish and English. Approximately three hundred students are participants in the program for which this curriculum was designed. This study suggests how selected science objectives may be implemented using the thematic approach. Each theme contains a media resource list of Items available from the Wapato Primary Media Center and suggested activities which will help to integrate the science unit with other subject areas. The Intent of the curriculum design ls that children learn language and science naturally when they are developed in a meaningful context
A study towards the potentials of robotic technologies to decrease risk to personnelâs safety in Statnett
Background of the project
Health, safety and the environment (HSE) is Statnett´s nr.1 priority and Statnett has a zero vision towards accidents. Unfortunately, Statnett and their entrepreneurs experience accidents each year. With an increasing activity level towards 2020, it is natural to estimate that the number of accidents will increase in line with the activity. It can therefore be interesting to study new technologies with high potential to reduce risk, if it is rapidly implemented.
Goals
There were three goals with this thesis. The first was to identify robotic technologies, available now or within a five-year period with potential for use in Statnett. The second goal was to identify dangerous operations performed by Statnett or Statnett´s entrepreneurs. The third goal was to provide a recommendation of which robotic technologies that can both execute the identified operations and reduce the risks of the operations.
General information about the thesis
This report was made as a master thesis at the end of a five-year study towards a Master's Degree in science at Norwegian University of Life Science(NMBU). The study was performed between January and May 2016, and represent 30 ECTS. The thesis is written under collaboration between Statnett and NMBU.
Method
This thesis is based on literature study, interviews, observations and data analysis.
Results
The main outcome was the following:
⢠There are many types of robotic technologies with different abilities and potential for implementation in Statnett and Statnett´s entrepreneurs, all with a high level of technology readiness(TRL) or already in use. There are however limitations with every type of robotic technologies, e.g. many of the line suspended robotic devices have problems crossing suspension towers and there is actually only one that is supposedly able to cross dead-end towers.
⢠There is no doubt that Statnett and their entrepreneurs perform dangerous operations. Many high risk operations are identified, but there are still reasons to believe that even more could be found. All of the identified operations contain different factors of risk. Some of the risk factors have led to tragic accidents ending with death or severe illness. The biggest identified risk factors are working with helicopter and working at height.
⢠There are several robotic technologies with the possibility to both perform and reduce the risk of some of the dangerous operations identified in this thesis.
Recommendation for further work
Based on the robotic technology with the highest potential to both execute operations and reduce the operations risks, eleven technologies are recommended for further research and development towards permanent implementation in specific operations.Bakgrunn for prosjektet
Helse, miljø og sikkerhet (HMS) er Statnetts topp prioritet. Statnett har en visjon om null
ulykker, men opplever ulykker hvert ür sammen med sine entreprenører. Frem mot 2020 er
det planlagt økt aktivitet og det er derfor naturlig ü anta at antall ulykker vil øke i takt med
aktiviteten. Det kan derfor vĂŚre interessant ĂĽ se pĂĽ ny teknologis mulighet til ĂĽ redusere
risiko, hvis det kan implementeres raskt.
MĂĽl:
Oppgaven har tre mül. Det første er ü identifisere robotteknologi tilgjengelig i dag eller innen
en femĂĽrs periode med potensial for bruk i Statnett. MĂĽl nummer to er ĂĽ identifisere farlige
operasjoner utført av Statnett eller deres entreprenører. Det siste mület er ü gi en anbefaling av
hvilken robotteknologi som har størst mulighet til ü büde utføre operasjonene samtidig som
den kan redusere operasjonens risiko.
Generell informasjon om oppgaven
Oppgaven er skrevet som en masteroppgave i siste semester av et femĂĽrig masterstudie pĂĽ
Norges miljø- og biovitenskapelige universitet (NMBU). Oppgaven representerer 30
studiepoeng og er skrevet som et samarbeid mellom Statnett og NMBU.
Metode
Oppgaven er basert pĂĽ litteratur, intervjuer, observasjoner og analyse av innsamlet data.
Resultat
Hovedresultatene var som følger:
⢠Det er identifisert mange typer robotteknologi med forskjellige anvendelser og potensial
for implementering hos Statnett og Statnetts entreprenører. Alle teknologiene var langt i
utviklingen, høy âtechnology readiness levelâ (TRL), eller var allerede i bruk. Det var like
vell utfordringer med alle teknologiene, som f.eks. at fĂĽ âline suspended robotic devicesâ
kan krysse bĂŚremaster og at det faktisk bare er en som skal klare ĂĽ krysse ankermaster.
⢠Det er ingen tvil om at Statnett og deres entreprenører utfører farlige operasjoner. Det er
identifisert mange høy risiko operasjoner, men det er fortsatt grunn til ü tro at enda flere
kan identifiseres ved et grundigere studium. Alle operasjonene inneholder forskjellige
risikofaktorer og noen av risikofaktorene har ført til tragiske ulykker som har endt med
død eller alvorlige skader. De største risikofaktorene er identifisert som bruk av helikopter
og arbeid i høyden.
⢠Det er identifisert flere robotteknologier med potensial for ü büde kunne utføre og
redusere risikoen til noen av de identifiserte operasjonene.
Anbefaling for videre arbeid
Basert pü den robotteknologien med høyest potensial for ü bade utføre og redusere risikoen til
noen av de identifiserte operasjonene er elleve teknologier anbefalt for videre arbeid.M-M
Montana Kaimin, December 4, 2003
Student newspaper of the University of Montana, Missoula.https://scholarworks.umt.edu/studentnewspaper/5823/thumbnail.jp
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