298 research outputs found
Positioning a coarse-calibrated camera with respect to an unknown object by 2D 1/2 visual servoing
International audienceIn this paper we propose a new vision-based robot control approach halfway between the classical position-based and image-based visual servoings. It allows to avoid their respective disadvantages. The homography between some planar feature points extracted from two images (corresponding to the current and desired camera poses) is computed at each iteration. Then, an approximate partial-pose, where the translational term is known only up to a scale factor, is deduced, from which can be designed a closed-loop control law controlling the six camera d.o.f.. Contrarily to the position-based visual servoing, our scheme does not need any geometric 3D model of the object. Furthermore and contrarily to the image-based visual servoing, our approach ensures the convergence of the control law in all the task space
Temperature dependence of the diffuse scattering fine structure in equiatomic CuAu
The temperature dependence of the diffuse scattering fine structure from
disordered equiatomic CuAu was studied using {\it in situ} x-ray scattering. In
contrast to CuAu the diffuse peak splitting in CuAu was found to be
relatively insensitive to temperature. Consequently, no evidence for a
divergence of the antiphase length-scale at the transition temperature was
found. At all temperatures studied the peak splitting is smaller than the value
corresponding to the CuAuII modulated phase. An extended Ginzburg-Landau
approach is used to explain the temperature dependence of the diffuse peak
profiles in the ordering and modulation directions. The estimated mean-field
instability point is considerably lower than is the case for CuAu.Comment: 4 pages, 5 figure
The Vehicle, Spring 1993
1993 Commemorative Edition: Celebrating 35 Years
Table of Contents
The Vehicle Editors\u27 Lineagepage 5
Milestonespage 6
THE SIXTIES
Coverspage 7
Editors\u27 Notespage 8
Sureness is Never - excerptDon Shepardsonpage 9
SophisticationBenjamin Polkpage 10
A SonnetMignon Stricklandpage 11
The Twenty-Third ChannelBen Polkpage 11
Opposite AttractionsC.E.M. (Christine McColl)page 12
John F. KennedyJoel E. Hendrickspage 13
The Girl on the White PonyLarry Gatespage 14
The TimesW.D.M. (William Moser)page 16
Home ThoughtsJane Careypage 17
1966Roger Zulaufpage 18
Nagging ThoughtJanet Andrewspage 18
THE SEVENTIES
Coverspage 19
Editors\u27 Notespage 20
RevolutionsSteve Siegelpage 21
UntitledKristine Kirkhampage 23
The Arithmetic ProblemJanice Forbuspage 23
Willie Seeverson Threw a Worm at MeMary Pipekpage 24
a love poem (by approximation)Ted Baldwinpage 25
Night and Summer in Two WorldsBarry Smithpage 26
Story of a Teenage PickleTerry Louis Schultzpage 27
Danny Lonely, Danny WildDevin Brownpage 28
Always TomorrowMary McDanielpage 29
THE EIGHTIES
Coverspage 31
Having ChildrenDevon Flesorpage 33
What is Unnatural Is Sometimes MagicAngelique Jenningspage 34
If My Father Were A Writer, He Would Still BuildAngelique Jenningspage 35
Photo AlbumPatrick Peterspage 36
Poet Born in Pearl HarborAngelique Jenningspage 37
The History of High School BasketballPatrick Peterspage 38
Banana BreadGail Bowerpage 39
Cover LetterBob Zordanipage 40
Home MoviesBob Zordanipage 41
MigrationPatrick Peterspage 42
THE NINETIES
Ba, Ba, Black SheepVictoria Bennettpage 45
Daily LessonsJennifer Moropage 49
Folding My OwnLaurie Ann Malispage 51
About the Authorspage 53
Editors\u27 Notespage 56https://thekeep.eiu.edu/vehicle/1062/thumbnail.jp
The Vehicle, Spring 1993
1993 Commemorative Edition: Celebrating 35 Years
Table of Contents
The Vehicle Editors\u27 Lineagepage 5
Milestonespage 6
THE SIXTIES
Coverspage 7
Editors\u27 Notespage 8
Sureness is Never - excerptDon Shepardsonpage 9
SophisticationBenjamin Polkpage 10
A SonnetMignon Stricklandpage 11
The Twenty-Third ChannelBen Polkpage 11
Opposite AttractionsC.E.M. (Christine McColl)page 12
John F. KennedyJoel E. Hendrickspage 13
The Girl on the White PonyLarry Gatespage 14
The TimesW.D.M. (William Moser)page 16
Home ThoughtsJane Careypage 17
1966Roger Zulaufpage 18
Nagging ThoughtJanet Andrewspage 18
THE SEVENTIES
Coverspage 19
Editors\u27 Notespage 20
RevolutionsSteve Siegelpage 21
UntitledKristine Kirkhampage 23
The Arithmetic ProblemJanice Forbuspage 23
Willie Seeverson Threw a Worm at MeMary Pipekpage 24
a love poem (by approximation)Ted Baldwinpage 25
Night and Summer in Two WorldsBarry Smithpage 26
Story of a Teenage PickleTerry Louis Schultzpage 27
Danny Lonely, Danny WildDevin Brownpage 28
Always TomorrowMary McDanielpage 29
THE EIGHTIES
Coverspage 31
Having ChildrenDevon Flesorpage 33
What is Unnatural Is Sometimes MagicAngelique Jenningspage 34
If My Father Were A Writer, He Would Still BuildAngelique Jenningspage 35
Photo AlbumPatrick Peterspage 36
Poet Born in Pearl HarborAngelique Jenningspage 37
The History of High School BasketballPatrick Peterspage 38
Banana BreadGail Bowerpage 39
Cover LetterBob Zordanipage 40
Home MoviesBob Zordanipage 41
MigrationPatrick Peterspage 42
THE NINETIES
Ba, Ba, Black SheepVictoria Bennettpage 45
Daily LessonsJennifer Moropage 49
Folding My OwnLaurie Ann Malispage 51
About the Authorspage 53
Editors\u27 Notespage 56https://thekeep.eiu.edu/vehicle/1062/thumbnail.jp
Changes in the ceIl membrane of Lactobacillus bulgaricus during storage following freeze-drying
The mechanism of inactivation of freeze-dried Lactobacillus bulgaricus during storage in maltodextrin under controlled humidity was investigated. Evidence is presented supporting the hypothesis that membrane damage occurs during storage. A study on the lipid composition of the cells by gas chromatography showed a decrease in the unsaturated and saturated fatty acid content of the cell. Further evidence indicating membrane damage includes a decrease in membrane bound proton-translocating ATPase activity
Frequency and Prognostic Impact of ALK Amplifications and Mutations in the European Neuroblastoma Study Group (SIOPEN) High-Risk Neuroblastoma Trial (HR-NBL1).
In neuroblastoma (NB), the ALK receptor tyrosine kinase can be constitutively activated through activating point mutations or genomic amplification. We studied ALK genetic alterations in high-risk (HR) patients on the HR-NBL1/SIOPEN trial to determine their frequency, correlation with clinical parameters, and prognostic impact.
Diagnostic tumor samples were available from 1,092 HR-NBL1/SIOPEN patients to determine ALK amplification status (n = 330), ALK mutational profile (n = 191), or both (n = 571).
Genomic ALK amplification (ALKa) was detected in 4.5% of cases (41 out of 901), all except one with MYCN amplification (MNA). ALKa was associated with a significantly poorer overall survival (OS) (5-year OS: ALKa [n = 41] 28% [95% CI, 15 to 42]; no-ALKa [n = 860] 51% [95% CI, 47 to 54], [P < .001]), particularly in cases with metastatic disease. ALK mutations (ALKm) were detected at a clonal level (> 20% mutated allele fraction) in 10% of cases (76 out of 762) and at a subclonal level (mutated allele fraction 0.1%-20%) in 3.9% of patients (30 out of 762), with a strong correlation between the presence of ALKm and MNA (P < .001). Among 571 cases with known ALKa and ALKm status, a statistically significant difference in OS was observed between cases with ALKa or clonal ALKm versus subclonal ALKm or no ALK alterations (5-year OS: ALKa [n = 19], 26% [95% CI, 10 to 47], clonal ALKm [n = 65] 33% [95% CI, 21 to 44], subclonal ALKm (n = 22) 48% [95% CI, 26 to 67], and no alteration [n = 465], 51% [95% CI, 46 to 55], respectively; P = .001). Importantly, in a multivariate model, involvement of more than one metastatic compartment (hazard ratio [HR], 2.87; P < .001), ALKa (HR, 2.38; P = .004), and clonal ALKm (HR, 1.77; P = .001) were independent predictors of poor outcome.
Genetic alterations of ALK (clonal mutations and amplifications) in HR-NB are independent predictors of poorer survival. These data provide a rationale for integration of ALK inhibitors in upfront treatment of HR-NB with ALK alterations
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