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  1. AU="Wacker, L."
  2. AU="Pinheiro, Paula F"
  3. AU="Xiao-Hong Xu"
  4. AU="Adamu, Mariam"
  5. AU="Carmona-Hernandez, Juan Carlos"
  6. AU=Tee Jie Kai
  7. AU=Bongaerts Dion AU=Bongaerts Dion
  8. AU=Assari Shervin
  9. AU="Søes, Lillian Marie"
  10. AU="DeForest Hauser, Cindy"
  11. AU=Khosravi Fatemeh
  12. AU="Sandramara Sasso"
  13. AU="Krejci, Ivo"
  14. AU="Kristie Bloom"
  15. AU="Oliveira, Cláudia Regina G C M de"
  16. AU="Giuseppe Di Capua"
  17. AU=Leng Shuguang
  18. AU="Ahmed Y. Abdelbadee"
  19. AU=Berthold F
  20. AU="Virginia M.Y. Lee"
  21. AU="López-Lago, Ana M"
  22. AU="Barkley, Russell A"
  23. AU="Gahwai, Dharmendra"
  24. AU="Nardelli, S."
  25. AU="Clark, Sarah Elizabeth"
  26. AU="Thaísa X. Silva"

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  1. Artikel ; Online: Back to the future: The advantage of studying key events in human evolution using a new high resolution radiocarbon method.

    Talamo, Sahra / Kromer, Bernd / Richards, Michael P / Wacker, Lukas

    PloS one

    2023  Band 18, Heft 2, Seite(n) e0280598

    Abstract: Radiocarbon dating is the most widely applied dating method in archaeology, especially in human evolution studies, where it is used to determine the chronology of key events, such as the replacement of Neanderthals by modern humans in Europe. However, ... ...

    Abstract Radiocarbon dating is the most widely applied dating method in archaeology, especially in human evolution studies, where it is used to determine the chronology of key events, such as the replacement of Neanderthals by modern humans in Europe. However, the method does not always provide precise and accurate enough ages to understand the important processes of human evolution. Here we review the newest method developments in radiocarbon dating ('Radiocarbon 3.0'), which can lead us to much better chronologies and understanding of the major events in recent human evolution. As an example, we apply these new methods to discuss the dating of the important Palaeolithic site of Bacho Kiro (Bulgaria).
    Mesh-Begriff(e) Humans ; Archaeology/methods ; Bulgaria ; Europe ; Fossils ; Neanderthals ; Radiometric Dating/methods
    Sprache Englisch
    Erscheinungsdatum 2023-02-15
    Erscheinungsland United States
    Dokumenttyp Review ; Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2267670-3
    ISSN 1932-6203 ; 1932-6203
    ISSN (online) 1932-6203
    ISSN 1932-6203
    DOI 10.1371/journal.pone.0280598
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  2. Artikel ; Online: The invention of writing on Rapa Nui (Easter Island). New radiocarbon dates on the Rongorongo script.

    Ferrara, Silvia / Tassoni, Laura / Kromer, Bernd / Wacker, Lukas / Friedrich, Michael / Tonini, Francesca / Lastilla, Lorenzo / Ravanelli, Roberta / Talamo, Sahra

    Scientific reports

    2024  Band 14, Heft 1, Seite(n) 2794

    Abstract: Placing the origin of an undeciphered script in time is crucial to understanding the invention of writing in human history. Rapa Nui, also known as Easter Island, developed a script, now engraved on fewer than 30 wooden objects, which is still ... ...

    Abstract Placing the origin of an undeciphered script in time is crucial to understanding the invention of writing in human history. Rapa Nui, also known as Easter Island, developed a script, now engraved on fewer than 30 wooden objects, which is still undeciphered. Its origins are also obscure. Central to this issue is whether the script was invented before European travelers reached the island in the eighteenth century AD. Hence direct radiocarbon dating of the wood plays a fundamental role. Until now, only two tablets were directly dated, placing them in the nineteenth c. AD, which does not solve the question of independent invention. Here we radiocarbon-dated four Rongorongo tablets preserved in Rome, Italy. One specimen yielded a unique and secure mid-fifteenth c. date, while the others fall within the nineteenth c. AD. Our results suggest that the use of the script could be placed to a horizon that predates the arrival of external influence.
    Mesh-Begriff(e) Humans ; Inventions ; Polynesia ; Wood ; Writing ; Italy
    Sprache Englisch
    Erscheinungsdatum 2024-02-02
    Erscheinungsland England
    Dokumenttyp Journal Article
    ZDB-ID 2615211-3
    ISSN 2045-2322 ; 2045-2322
    ISSN (online) 2045-2322
    ISSN 2045-2322
    DOI 10.1038/s41598-024-53063-7
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  3. Artikel ; Online: Absolute dating of the European Neolithic using the 5259 BC rapid

    Maczkowski, Andrej / Pearson, Charlotte / Francuz, John / Giagkoulis, Tryfon / Szidat, Sönke / Wacker, Lukas / Bolliger, Matthias / Kotsakis, Kostas / Hafner, Albert

    Nature communications

    2024  Band 15, Heft 1, Seite(n) 4263

    Abstract: Abrupt radiocarbon ( ...

    Abstract Abrupt radiocarbon (
    Sprache Englisch
    Erscheinungsdatum 2024-05-20
    Erscheinungsland England
    Dokumenttyp Journal Article
    ZDB-ID 2553671-0
    ISSN 2041-1723 ; 2041-1723
    ISSN (online) 2041-1723
    ISSN 2041-1723
    DOI 10.1038/s41467-024-48402-1
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  4. Artikel ; Online: Radiocarbon: A key tracer for studying Earth's dynamo, climate system, carbon cycle, and Sun.

    Heaton, T J / Bard, E / Bronk Ramsey, C / Butzin, M / Köhler, P / Muscheler, R / Reimer, P J / Wacker, L

    Science (New York, N.Y.)

    2021  Band 374, Heft 6568, Seite(n) eabd7096

    Abstract: Radiocarbon ( ...

    Abstract Radiocarbon (
    Sprache Englisch
    Erscheinungsdatum 2021-11-05
    Erscheinungsland United States
    Dokumenttyp Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 128410-1
    ISSN 1095-9203 ; 0036-8075
    ISSN (online) 1095-9203
    ISSN 0036-8075
    DOI 10.1126/science.abd7096
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  5. Artikel ; Online: The Society of Thoracic Surgeons Congenital Heart Surgery Database: 2023 Update on Outcomes and Research.

    Kumar, S Ram / Gaynor, J William / Heuerman, Hannah / Mayer, John E / Nathan, Meena / O'Brien, James E / Pizarro, Christian / Subačius, Haris / Wacker, Leslie / Wellnitz, Chasity / Eghtesady, Pirooz

    The Annals of thoracic surgery

    2024  Band 117, Heft 5, Seite(n) 904–914

    Abstract: The Society of Thoracic Surgeons (STS) Congenital Heart Surgery Database (CHSD) continues to be the most comprehensive database of congenital and pediatric cardiothoracic surgical procedures in the world and contains information on 664,210 operations as ... ...

    Abstract The Society of Thoracic Surgeons (STS) Congenital Heart Surgery Database (CHSD) continues to be the most comprehensive database of congenital and pediatric cardiothoracic surgical procedures in the world and contains information on 664,210 operations as of June 30, 2023. The 35th harvest of the STS CHSD data was undertaken in Spring 2023, spanning the 4-year period January 1, 2019, through December 31, 2022, and included 144,919 operations performed at 114 participating sites in North America. The harvest analysis was successfully executed by the STS Research and Analytic Center. The overall unadjusted mortality rate was 2.68% and has remained stable over the 4 years included in the current harvest window. Mortality is highest in neonates (7.4%) and lowest in children (1.1%). As in prior analyses, observed mortality and postoperative length of stay in the database increase with an increase in STS-European Association for Cardio-Thoracic Surgery (STAT) Congenital Heart Surgery Mortality Categories. This quality report summarizes contemporary outcomes, provides the odds ratios for the CHSD risk model variables based on this analysis, and describes on-going efforts to improve data collection and augment analytical approaches. Lastly, 5 research publications completed in the last year using data from the CHSD are also summarized.
    Mesh-Begriff(e) Humans ; Heart Defects, Congenital/surgery ; Heart Defects, Congenital/mortality ; Societies, Medical ; Databases, Factual ; Thoracic Surgery ; Cardiac Surgical Procedures ; Infant ; Infant, Newborn ; Biomedical Research ; Child ; Child, Preschool
    Sprache Englisch
    Erscheinungsdatum 2024-03-24
    Erscheinungsland Netherlands
    Dokumenttyp Journal Article
    ZDB-ID 211007-6
    ISSN 1552-6259 ; 0003-4975
    ISSN (online) 1552-6259
    ISSN 0003-4975
    DOI 10.1016/j.athoracsur.2024.03.018
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  6. Buch ; Online: A Critical Assessment of State-of-the-Art in Entity Alignment

    Berrendorf, Max / Wacker, Ludwig / Faerman, Evgeniy

    2020  

    Abstract: In this work, we perform an extensive investigation of two state-of-the-art (SotA) methods for the task of Entity Alignment in Knowledge Graphs. Therefore, we first carefully examine the benchmarking process and identify several shortcomings, which make ... ...

    Abstract In this work, we perform an extensive investigation of two state-of-the-art (SotA) methods for the task of Entity Alignment in Knowledge Graphs. Therefore, we first carefully examine the benchmarking process and identify several shortcomings, which make the results reported in the original works not always comparable. Furthermore, we suspect that it is a common practice in the community to make the hyperparameter optimization directly on a test set, reducing the informative value of reported performance. Thus, we select a representative sample of benchmarking datasets and describe their properties. We also examine different initializations for entity representations since they are a decisive factor for model performance. Furthermore, we use a shared train/validation/test split for a fair evaluation setting in which we evaluate all methods on all datasets. In our evaluation, we make several interesting findings. While we observe that most of the time SotA approaches perform better than baselines, they have difficulties when the dataset contains noise, which is the case in most real-life applications. Moreover, we find out in our ablation study that often different features of SotA methods are crucial for good performance than previously assumed. The code is available at https://github.com/mberr/ea-sota-comparison.

    Comment: updated acknowledgement and fixed typo
    Schlagwörter Computer Science - Computation and Language ; Computer Science - Machine Learning
    Thema/Rubrik (Code) 004
    Erscheinungsdatum 2020-10-30
    Erscheinungsland us
    Dokumenttyp Buch ; Online
    Datenquelle BASE - Bielefeld Academic Search Engine (Lebenswissenschaftliche Auswahl)

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  7. Buch ; Online: Solar cyclic activity over the last millennium reconstructed from annual 14C data

    Usoskin, I. G. / Solanki, S. K. / Krivova, N. / Hofer, B. / Kovaltsov, G. A. / Wacker, L. / Brehm, N. / Kromer, B.

    2021  

    Abstract: The 11-year solar cycle is the dominant pattern of solar activity reflecting the oscillatory dynamo mechanism in the Sun. Solar cycles were directly observed since 1700, while indirect proxies suggest their existence over a much longer period of time but ...

    Abstract The 11-year solar cycle is the dominant pattern of solar activity reflecting the oscillatory dynamo mechanism in the Sun. Solar cycles were directly observed since 1700, while indirect proxies suggest their existence over a much longer period of time but generally without resolving individual cycles and their continuity. Here we reconstruct individual cycles for the last millennium using recent 14C data and state-of-the-art models. Starting with the 14C production rate determined from the so far most precise measurements of radiocarbon content in tree rings, solar activity is reconstructed in three physics-based steps: (1) Correction of the 14C production rate for the changing geomagnetic field; (2) Computation of the open solar magnetic flux; and (3) Conversion into sunspot numbers outside of grand minima. Solar activity is reconstructed for the period 971-1900 (85 individual cycles). This more than doubles the number of solar cycles known from direct solar observations. We found that lengths and strengths of well-defined cycles outside grand minima are consistent with those obtained from the direct sunspot observations after 1750. The validity of the Waldmeier rule is confirmed at a highly significant level. Solar activity is found to be in a deep grand minimum when the activity is mostly below the sunspot formation threshold, during about 250 years. Therefore, although considerable cyclic variability in 14C is seen even during grand minima, individual solar cycles can hardly be reliably resolved therein. Three potential solar particle events, ca. 994, 1052 and 1279 AD, are shown. A new about 1000-year long solar activity reconstruction, in the form of annual (pseudo) sunspot numbers with full assessment of uncertainties, is presented based on new high-precision 14C measurements and state-of-the-art models, more than doubling the number of individually resolved solar cycles.

    Comment: Accepted for publication in Astronomy and Astrophysics
    Schlagwörter Astrophysics - Solar and Stellar Astrophysics
    Thema/Rubrik (Code) 621
    Erscheinungsdatum 2021-03-28
    Erscheinungsland us
    Dokumenttyp Buch ; Online
    Datenquelle BASE - Bielefeld Academic Search Engine (Lebenswissenschaftliche Auswahl)

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  8. Artikel ; Online: Compound-Specific Radiocarbon Analysis by Elemental Analyzer-Accelerator Mass Spectrometry: Precision and Limitations.

    Haghipour, N / Ausin, B / Usman, M O / Ishikawa, N / Wacker, L / Welte, C / Ueda, K / Eglinton, T I

    Analytical chemistry

    2019  Band 91, Heft 3, Seite(n) 2042–2049

    Abstract: We examine instrumental and methodological capabilities for microscale (10-50 μg of C) radiocarbon analysis of individual compounds in the context of paleoclimate and paleoceanography applications, for which relatively high-precision measurements are ... ...

    Abstract We examine instrumental and methodological capabilities for microscale (10-50 μg of C) radiocarbon analysis of individual compounds in the context of paleoclimate and paleoceanography applications, for which relatively high-precision measurements are required. An extensive suite of data for
    Sprache Englisch
    Erscheinungsdatum 2019-01-14
    Erscheinungsland United States
    Dokumenttyp Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 1508-8
    ISSN 1520-6882 ; 0003-2700
    ISSN (online) 1520-6882
    ISSN 0003-2700
    DOI 10.1021/acs.analchem.8b04491
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  9. Artikel: A Single-Year Cosmic Ray Event at 5410 BCE Registered in

    Miyake, F / Panyushkina, I P / Jull, A J T / Adolphi, F / Brehm, N / Helama, S / Kanzawa, K / Moriya, T / Muscheler, R / Nicolussi, K / Oinonen, M / Salzer, M / Takeyama, M / Tokanai, F / Wacker, L

    Geophysical research letters

    2021  Band 48, Heft 11, Seite(n) e2021GL093419

    Abstract: ... The ... ...

    Abstract The annual
    Sprache Englisch
    Erscheinungsdatum 2021-06-09
    Erscheinungsland United States
    Dokumenttyp Journal Article
    ZDB-ID 7403-2
    ISSN 0094-8276
    ISSN 0094-8276
    DOI 10.1029/2021GL093419
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  10. Artikel ; Online: Lactation and menstruation shift the vaginal microbiota in captive rhesus monkeys to be more similar to the male urethral microbiota.

    Hallmaier-Wacker, L K / Lüert, S / Roos, C / Knauf, S

    Scientific reports

    2019  Band 9, Heft 1, Seite(n) 17399

    Abstract: The vaginal microbiota of nonhuman primates differs substantially from humans in terms of Lactobacillus abundance, overall taxonomic diversity, and vaginal pH. Given these differences, it remains unclear in what way the nonhuman primate genital ... ...

    Abstract The vaginal microbiota of nonhuman primates differs substantially from humans in terms of Lactobacillus abundance, overall taxonomic diversity, and vaginal pH. Given these differences, it remains unclear in what way the nonhuman primate genital microbiota protects against pathogens, in particular sexually transmitted infections. Considering the effect that microbiota variations can have on disease acquisition and outcome, we examined endogenous and exogenous factors that influence the urogenital microbiota of male and female captive rhesus monkeys. The male urethral (n = 37) and vaginal (n = 194) microbiota of 11 breeding groups were examined in a cross-sectional study. During lactation and menstruation, the vaginal microbiota becomes significantly more diverse and more similar to the microbes observed in the male urethra. Group association and cage-mate (sexual partners) relationships were additionally associated with significant differences in the urogenital microbiota. Our results demonstrate that microbiota considerations are necessary in order to make informed selection of nonhuman primates as translational animal models.
    Mesh-Begriff(e) Age Factors ; Animals ; Breeding ; Female ; Lactation ; Macaca mulatta/physiology ; Male ; Menstrual Cycle ; Metagenome ; Metagenomics/methods ; Microbiota ; Sex Factors ; Sexual Behavior, Animal ; Urethra/microbiology ; Vagina/microbiology
    Sprache Englisch
    Erscheinungsdatum 2019-11-22
    Erscheinungsland England
    Dokumenttyp Journal Article
    ZDB-ID 2615211-3
    ISSN 2045-2322 ; 2045-2322
    ISSN (online) 2045-2322
    ISSN 2045-2322
    DOI 10.1038/s41598-019-53976-8
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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