Result 1 - 10 of total 248
IEEE Microwave Mag.
| Keywords | covid19 |
|---|---|
| Publisher | WHO |
| Document type | Article |
| Note | WHO #Covidence: #638081 |
| Database | COVID19 |
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Ecological informatics. 2022 Nov., v. 71
2022
Abstract: Reliably detecting and tracking animals in wildlife videos is an essential basis for researchers to be able to analyse animal behavior or recognize animal individuals. In order to correctly distinguish individual animals that are standing close to each ... ...
| Abstract | Reliably detecting and tracking animals in wildlife videos is an essential basis for researchers to be able to analyse animal behavior or recognize animal individuals. In order to correctly distinguish individual animals that are standing close to each other, bounding boxes around the animals are not sufficient. Instead, an exact contour of the animal, an instance mask, which is the result of an instance segmentation, is needed. In this paper, we present SWIFT, a novel multi-object tracking and segmentation (MOTS) pipeline that solves this task. We evaluate the functionality of our approach on a self-created wildlife video dataset containing red deer and fallow deer. Our dataset is one of the very few datasets in wildlife monitoring that is annotated with instance masks and tracking IDs. SWIFT significantly improves the quality of the instance masks compared to using a state-of-the-art instance segmentation approach from 0.432 average precision to 0.495 average precision. Our tracking algorithm uses multiple filtering steps to either delete tracks that are found incorrectly or to merge tracks that are not yet connected. This results in an increased multi-object tracking accuracy score in comparison to a state-of-the-art tracking approach from 57.2% to 63.8%, which means that our detected tracking results are less erroneous. |
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| Keywords | Cervus dama ; Cervus elaphus ; algorithms ; animal behavior ; animals ; data collection ; wildlife |
| Language | English |
| Dates of publication | 2022-11 |
| Publishing place | Elsevier B.V. |
| Document type | Article |
| ZDB-ID | 2212016-6 |
| ISSN | 1878-0512 ; 1574-9541 |
| ISSN (online) | 1878-0512 |
| ISSN | 1574-9541 |
| DOI | 10.1016/j.ecoinf.2022.101794 |
| Database | NAL-Catalogue (AGRICOLA) |
| Z 7643: Show issues |
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Ecological informatics. 2021 Nov., v. 65
2021
Abstract: In wildlife monitoring, large amounts of video data are generated by recordings from camera traps. Training of deep learning methods demands for annotated video data, i.e. video data where each frame is annotated with the correct number and species ... ...
| Abstract | In wildlife monitoring, large amounts of video data are generated by recordings from camera traps. Training of deep learning methods demands for annotated video data, i.e. video data where each frame is annotated with the correct number and species designation of the observed animals. But manual annotation of video clips is extremely time-consuming and laborious. In this proof of concept we compare three different state-of-the-art approaches to the annotation of video data: Manual annotation using the VGG Image Annotator, interactive annotation using the MiVOS video annotator and automated annotation utilizing an adapted and customized Tracktor approach that propagates annotations from frame to frame through complete video clips. An experimental proof of concept on wildlife video clips captured by camera traps show extreme time savings from hours down to minutes (i.e. in order of a magnitude) thereby not only maintaining the detection scores of animals in each frame but also improving detection scores from 54.7% to 58.5% compared to the employment of perfect but costly manual annotations in training. |
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| Keywords | automation ; cameras ; wildlife |
| Language | English |
| Dates of publication | 2021-11 |
| Publishing place | Elsevier B.V. |
| Document type | Article |
| ZDB-ID | 2212016-6 |
| ISSN | 1878-0512 ; 1574-9541 |
| ISSN (online) | 1878-0512 |
| ISSN | 1574-9541 |
| DOI | 10.1016/j.ecoinf.2021.101418 |
| Database | NAL-Catalogue (AGRICOLA) |
| Z 7643: Show issues |
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Ecological informatics. 2021 Mar., v. 61
2021
Abstract: Biodiversity crisis has continued to accelerate. Studying animal distribution, movement and behaviour is of critical importance to address environmental challenges such as spreading of diseases, invasive species, climate and land-use change. Camera traps ...
| Abstract | Biodiversity crisis has continued to accelerate. Studying animal distribution, movement and behaviour is of critical importance to address environmental challenges such as spreading of diseases, invasive species, climate and land-use change. Camera traps are an appropriate technique for continuous animal monitoring in an automated 24/7/52 documentation. This study shows a proof-of-concept for an end-to-end pipeline to detect and classify animals and their behaviour in video clips. Video clips are captured with 8 frames per second by camera traps using infrared cameras and infrared flash-lights. The clips show deer, boars, foxes and hares - mostly at night time. Our approach shows an average precision of 63.8% for animal detection and identification. For action recognition the achieved accuracies range between 88.4% and 94.1%. |
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| Keywords | automation ; biodiversity ; cameras ; climate ; deer ; invasive species ; land use change ; wildlife |
| Language | English |
| Dates of publication | 2021-03 |
| Publishing place | Elsevier B.V. |
| Document type | Article |
| ZDB-ID | 2212016-6 |
| ISSN | 1878-0512 ; 1574-9541 |
| ISSN (online) | 1878-0512 |
| ISSN | 1574-9541 |
| DOI | 10.1016/j.ecoinf.2021.101215 |
| Database | NAL-Catalogue (AGRICOLA) |
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2023 Volume 131, Issue 15, Page(s) 159901
Abstract: This corrects the article DOI: 10.1103/PhysRevLett.128.164501. ...
| Abstract | This corrects the article DOI: 10.1103/PhysRevLett.128.164501. |
|---|---|
| Language | English |
| Publishing date | 2023-10-28 |
| Publishing country | United States |
| Document type | Published Erratum |
| ZDB-ID | 208853-8 |
| ISSN | 1079-7114 ; 0031-9007 |
| ISSN (online) | 1079-7114 |
| ISSN | 0031-9007 |
| DOI | 10.1103/PhysRevLett.131.159901 |
| Database | MEDical Literature Analysis and Retrieval System OnLINE |
| Z 4' 58/153: Show issues |
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1996
Abstract: PWie die Beiträge dieses Bandes und seiner Vorgänger (Wiener Slawistischer Almanach Bd. 33 u. Sbd. 37 sowie Specimina philologiae Slavicae Supplementband 42) zeigen, gibt es für die Jungslavistlnnen-Treffen weder thematische oder theoretische Vorgaben ... ...
| Abstract | PWie die Beiträge dieses Bandes und seiner Vorgänger (Wiener Slawistischer Almanach Bd. 33 u. Sbd. 37 sowie Specimina philologiae Slavicae Supplementband 42) zeigen, gibt es für die Jungslavistlnnen-Treffen weder thematische oder theoretische Vorgaben noch eine Festlegung der Slavine. Die Artikel geben somit die slavistische Linguistik in einem sehr weiten Spektrum wieder: von der generativen Grammatik über die funktionale Grammatik zur Dialoganalyse und vom Bulgarischen über das Tschechische zum Russischen. /P |
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| Size | 1 electronic resource (356 p.) |
| Publisher | Peter Lang International Academic Publishing Group |
| Document type | Book ; Online |
| Note | German ; Open Access |
| HBZ-ID | HT020099928 |
| ISBN | 9783876906539 ; 3876906539 |
| Database | ZB MED Catalogue: Medicine, Health, Nutrition, Environment, Agriculture |
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1993
Abstract: PDie 1972 von den Frankfurter Slavisten Olexa Horbatsch und Gerd Freidhof begründete Reihe Specimina philologiae Slavicae wird heute von Holger Kuße (Dresden), Peter Kosta (Potsdam), Beatrix Kreß (Hildesheim), Franz Schindler (Gießen), Barbara ... ...
| Abstract | PDie 1972 von den Frankfurter Slavisten Olexa Horbatsch und Gerd Freidhof begründete Reihe Specimina philologiae Slavicae wird heute von Holger Kuße (Dresden), Peter Kosta (Potsdam), Beatrix Kreß (Hildesheim), Franz Schindler (Gießen), Barbara Sonnenhauser (Zürich) und Nadine Thielemann (Wien) herausgeben. In der Reihe erscheinen Monographien, Sammelbände und Lehrbücher zu allen Gebieten der Slavistik, der Sprach-, der Literatur- und der Kulturwissenschaft. In der Sprachwissenschaft erscheinen sowohl sprachhistorische als auch innovative Arbeiten zur Pragmatik und Semantik, zu slavischen Kleinsprachen und zur Diskurslinguistik. In der Literatur- und Kulturwissenschaft gehört zu den besonderen Interessensgebieten die Russische Philosophie./P |
|---|---|
| Size | 1 electronic resource (572 p.) |
| Publisher | Peter Lang International Academic Publishing Group |
| Document type | Book ; Online |
| Note | German ; Open Access |
| HBZ-ID | HT020099985 |
| ISBN | 9783876905617 ; 3876905613 |
| Database | ZB MED Catalogue: Medicine, Health, Nutrition, Environment, Agriculture |
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2017 , Page(s) V6–04
| Event/congress | 12. Internationales SkillsLab Symposium 2017; Erlangen; 2017 |
|---|---|
| Keywords | Medizin, Gesundheit |
| Publishing date | 2017-03-09 |
| Publisher | German Medical Science GMS Publishing House; Düsseldorf |
| Document type | Conference proceedings |
| DOI | 10.3205/17isls20 |
| Database | German Medical Science |
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2022 Volume 128, Issue 16, Page(s) 164501
Abstract: The large-scale flow structure and the turbulent transfer of heat and momentum are directly measured in highly turbulent liquid metal convection experiments for Rayleigh numbers varied between 4×10^{5} and ≤5×10^{9} and Prandtl numbers of 0.025≤Pr≤0.033. ...
| Abstract | The large-scale flow structure and the turbulent transfer of heat and momentum are directly measured in highly turbulent liquid metal convection experiments for Rayleigh numbers varied between 4×10^{5} and ≤5×10^{9} and Prandtl numbers of 0.025≤Pr≤0.033. Our measurements are performed in two cylindrical samples of aspect ratios Γ=diameter/height=0.5 and 1 filled with the eutectic alloy GaInSn. The reconstruction of the three-dimensional flow pattern by 17 ultrasound Doppler velocimetry sensors detecting the velocity profiles along their beam lines in different planes reveals a clear breakdown of coherence of the large-scale circulation for Γ=0.5. As a consequence, the scaling laws for heat and momentum transfer inherit a dependence on the aspect ratio. We show that this breakdown of coherence is accompanied with a reduction of the Reynolds number Re. The scaling exponent β of the power law Nu∝Ra^{β} crosses eventually over from β=0.221 to 0.124 when the liquid metal flow at Γ=0.5 reaches Ra≳2×10^{8} and the coherent large-scale flow is completely collapsed. |
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| Language | English |
| Publishing date | 2022-05-06 |
| Publishing country | United States |
| Document type | Journal Article |
| ZDB-ID | 208853-8 |
| ISSN | 1079-7114 ; 0031-9007 |
| ISSN (online) | 1079-7114 |
| ISSN | 0031-9007 |
| DOI | 10.1103/PhysRevLett.128.164501 |
| Database | MEDical Literature Analysis and Retrieval System OnLINE |
| Z 4' 58/153: Show issues |
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2024 Volume 15, Issue 1, Page(s) 2670
Abstract: The presence of topological flat minibands in moiré materials provides an opportunity to explore the interplay between topology and correlation. In this work, we study moiré minibands in topological insulator films with two hybridized surface states ... ...
| Abstract | The presence of topological flat minibands in moiré materials provides an opportunity to explore the interplay between topology and correlation. In this work, we study moiré minibands in topological insulator films with two hybridized surface states under a moiré superlattice potential created by two-dimensional insulating materials. We show the lowest conduction (highest valence) Kramers' pair of minibands can be |
|---|---|
| Language | English |
| Publishing date | 2024-03-26 |
| Publishing country | England |
| Document type | Journal Article |
| ZDB-ID | 2553671-0 |
| ISSN | 2041-1723 ; 2041-1723 |
| ISSN (online) | 2041-1723 |
| ISSN | 2041-1723 |
| DOI | 10.1038/s41467-024-46717-7 |
| Database | MEDical Literature Analysis and Retrieval System OnLINE |
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