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Zeitschriftenartikel zum Thema „Dating potential“

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Veröffentlicht am 25. Mai 2024

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1

Neulieb, Thomas, Elisabeth Levac, John Southon, Michael Lewis, I. Florin Pendea und Gail L. Chmura. „Potential Pitfalls of Pollen Dating“. Radiocarbon 55, Nr. 3 (2013): 1142–55. http://dx.doi.org/10.1017/s0033822200048050.

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Pollen extracted from ocean and wetland sediments cored from the eastern Canadian Margin, James Bay region, and Atlantic provinces of Canada have been radiocarbon dated and results are reported here. Pollen dates from ocean sediments were compared with marine carbonate (mollusk shells or foraminifera) dates from the same core levels, dates for which validity was assessed via correlations with other cores, and for which reworking has been excluded. Pollen samples from 3 tidal wetlands were taken from levels dated with 137Cs and 210Pb profiles. Pollen dates from 2 additional wetlands were compared with 14C dates of botanical macrofossils. Most pollen dates disagree with 14C dates based on macrofossils or carbonates, with age differences typically exceeding 250 yr and reaching 4000 yr in one instance. In some cores, pollen dates show age reversals. Significant proportions of reworked pollen grains in ocean and wetland samples are associated with pollen dates that are too old. Prolonged core storage could result in pollen 14C ages that are too young, possibly because of growth of fungi or other microbes, but more work is needed to verify this hypothesis. Despite the problems we encountered, some pollen dates are consistent with other 14C dates from the same core levels, suggesting this dating method can work, but at present, more work is needed to understand the conflicting results obtained.

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Grün, Rainer. „Potential and problems of ESR dating“. International Journal of Radiation Applications and Instrumentation. Part D. Nuclear Tracks and Radiation Measurements 18, Nr. 1-2 (Januar 1991): 143–53. http://dx.doi.org/10.1016/1359-0189(91)90106-r.

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3

Matsuzaki, Hiroyuki. „Iodine-129, a Potential Dating Tool“. RADIOISOTOPES 73, Nr. 1 (15.03.2024): 47–59. http://dx.doi.org/10.3769/radioisotopes.73.47.

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4

Martin, Charles W. „Radiocarbon dating: Recent applications and future potential“. Geoarchaeology 14, Nr. 4 (April 1999): 371–73. http://dx.doi.org/10.1002/(sici)1520-6548(199904)14:4<371::aid-gea7>3.0.co;2-#.

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5

Bailey, David Evans. „The Potential for Immersive Technology combined with Online Dating“. Australian Journal of Telecommunications and the Digital Economy 5, Nr. 4 (25.12.2017): 125–35. http://dx.doi.org/10.18080/ajtde.v5n4.130.

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Whilst online dating has been around for several years; immersive technologies are relatively new to this type of interaction. The first forays into immersive VR online dating have only just being made in the past year. To what degree this type of technology will change the way that we date is potentially quite different from the current way that online dates are conducted. The way the technology works could make virtual dates seem as real as a physical date. Understanding how immersive technology functions gives some insights into the future of online dating and also the impact on the digital economy.

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Bailey, David Evans. „The Potential for Immersive Technology combined with Online Dating“. Journal of Telecommunications and the Digital Economy 5, Nr. 4 (25.12.2017): 125–35. http://dx.doi.org/10.18080/jtde.v5n4.130.

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Whilst online dating has been around for several years; immersive technologies are relatively new to this type of interaction. The first forays into immersive VR online dating have only just being made in the past year. To what degree this type of technology will change the way that we date is potentially quite different from the current way that online dates are conducted. The way the technology works could make virtual dates seem as real as a physical date. Understanding how immersive technology functions gives some insights into the future of online dating and also the impact on the digital economy.

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Uglietti, Chiara, Alexander Zapf, Theo Manuel Jenk, Michael Sigl, Sönke Szidat, Gary Salazar und Margit Schwikowski. „Radiocarbon dating of glacier ice: overview, optimisation, validation and potential“. Cryosphere 10, Nr. 6 (21.12.2016): 3091–105. http://dx.doi.org/10.5194/tc-10-3091-2016.

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Abstract. High-altitude glaciers and ice caps from midlatitudes and tropical regions contain valuable signals of past climatic and environmental conditions as well as human activities, but for a meaningful interpretation this information needs to be placed in a precise chronological context. For dating the upper part of ice cores from such sites, several relatively precise methods exist, but they fail in the older and deeper parts, where plastic deformation of the ice results in strong annual layer thinning and a non-linear age–depth relationship. If sufficient organic matter such as plant, wood or insect fragments were found, radiocarbon (14C) analysis would have thus been the only option for a direct and absolute dating of deeper ice core sections. However such fragments are rarely found and, even then, they would not be very likely to occur at the desired depth and resolution. About 10 years ago, a new, complementary dating tool was therefore introduced by our group. It is based on extracting the µg-amounts of the water-insoluble organic carbon (WIOC) fraction of carbonaceous aerosols embedded in the ice matrix for subsequent 14C dating. Since then this new approach has been improved considerably by reducing the measurement time and improving the overall precision. Samples with ∼ 10 µg WIOC mass can now be dated with reasonable uncertainty of around 10–20 % (variable depending on sample age). This requires about 300 to 800 g of ice for WIOC concentrations typically found in midlatitude and low-latitude glacier ice. Dating polar ice with satisfactory age precision is still not possible since WIOC concentrations are around 1 order of magnitude lower. The accuracy of the WIOC 14C method was validated by applying it to independently dated ice. With this method, the deepest parts of the ice cores from Colle Gnifetti and the Mt Ortles glacier in the European Alps, Illimani glacier in the Bolivian Andes, Tsambagarav ice cap in the Mongolian Altai, and Belukha glacier in the Siberian Altai have been dated. In all cases a strong annual layer thinning towards the bedrock was observed and the oldest ages obtained were in the range of 10 000 years. WIOC 14C dating was not only crucial for interpretation of the embedded environmental and climatic histories, but additionally gave a better insight into glacier flow dynamics close to the bedrock and past glacier coverage. For this the availability of multiple dating points in the deepest parts was essential, which is the strength of the presented WIOC 14C dating method, allowing determination of absolute ages from principally every piece of ice.

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Zytko, Douglas, Nicholas Mullins, Shelnesha Taylor und Richard H. Holler. „Dating Apps Are Used for More Than Dating“. Proceedings of the ACM on Human-Computer Interaction 6, GROUP (14.01.2022): 1–14. http://dx.doi.org/10.1145/3492849.

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Use and design of dating apps has evolved in recent years to accommodate other interaction goals beyond dating, prompting some researchers to now refer to these apps as people-nearby applications (PNAs). With this expansion of use comes increased potential for misinterpretation of users' goals for meeting face-to-face, which can pose risks to user safety particularly when disparities in sexual expectations occur. We present a survey study (n=132) with users of several PNAs and with various motivations for PNA-use to understand how interaction goals are disclosed and detected. The study finds such practices to be far from consistent, with some appearing highly susceptible to misinterpretation such as purposely delaying self-presentation of interaction goals until meeting face-to-face, and implying sexual expectations through vague references to "fun." We conclude by suggesting a modified version of the "swiping" feature in PNAs to facilitate consistent and overt self-presentation of interaction goals in ways that accommodate user tendencies discovered in the study.

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Tsukamoto, S., G. A. T. Duller, A. G. Wintle und D. Muhs. „Assessing the potential for luminescence dating of basalts“. Quaternary Geochronology 6, Nr. 1 (Februar 2011): 61–70. http://dx.doi.org/10.1016/j.quageo.2010.04.002.

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10

Yamaguchi, David K., und George L. Allen. „A new computer program for estimating the statistical significance of cross-dating positions for "floating" tree-ring series“. Canadian Journal of Forest Research 22, Nr. 9 (01.09.1992): 1215–21. http://dx.doi.org/10.1139/x92-162.

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CORREL is a FORTRAN program that employs cross correlation to (i) determine potential cross-dating (matching) positions for "floating" (undated) ring series; (ii) detect missing or false rings; and (iii) estimate the statistical significance of potential dating positions. To work properly, CORREL input data must be detrended and modeled using the autoregressive moving average procedure. To guard against spurious dating, the output's best date should be checked for dating consistency. The significance level of the best date is obtained by adjusting its single-dating-trial significance for multiplicity (repeated dating trials). Ideally, COREL should be used with the detrending tree-ring programs ARSTAN or INDEX, and with the data quality-control program COFECHA.

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Smith, Deja-Nelle. „How Deception Plays a Role in Online Dating and Dating Apps“. Canadian Journal of Family and Youth / Le Journal Canadien de Famille et de la Jeunesse 15, Nr. 2 (01.01.2023): 23–32. http://dx.doi.org/10.29173/cjfy29869.

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Most young adults today find dating apps a significant resource for forming intimate relationships. However, by using dating apps and online dating to meet potential love interests, there is always the risk of being deceived. This paper delves into the role of deceit concerning online dating and how it ruins the experience of dating and finding love online due to the false personas put up to trick others for their gain.

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Vagelpohl, Uwe. „Dating Medical Translations“. Journal of Abbasid Studies 2, Nr. 1 (08.07.2015): 86–106. http://dx.doi.org/10.1163/22142371-12340015.

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The third/ninth-century translator Ḥunayn b. Isḥāq and his associates produced more than a hundred mostly medical translations from Greek into Syriac and then into Arabic. We know little about the chronology of these translations, except for a few scattered remarks in Ḥunayn’sRisāla(Epistle). This article attempts to reconstruct the chronology based on Hippocratic quotations in the Arabic translation of Galen’s works. Hippocratic writings were usually not translated independently but embedded in Galen’s commentaries, so a comparison between this “embedded” Hippocrates and quotations from the same Hippocratic text elsewhere in the Arabic Galen might reveal chronological relationships. The findings of this collation are thought-provoking, but they need to be weighed against the uncertainties surrounding translation methods and potential interference by well-meaning later scholars and scribes.

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Regev, Lior, Eileen Eckmeier, Eugenia Mintz, Steve Weiner und Elisabetta Boaretto. „Radiocarbon Concentrations of Wood Ash Calcite: Potential for Dating“. Radiocarbon 53, Nr. 1 (2011): 117–27. http://dx.doi.org/10.1017/s0033822200034391.

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Ash is formed when plant calcium oxalate crystals (CaC2O4) decompose to form calcite (CaCO3). We found that ash does retain the original calcium oxalate radiocarbon concentration, but in addition, there is another minor 14C source. This is shown by the presence of a consistent small shift in the pMC and δ13C levels when comparing cellulose and ash from modern and archaeological woods. Possible mechanisms for 14C exchange during combustion or due to diagenesis are considered in order to define parameters for identifying better-preserved wood ash samples.

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Zeitler, P. K., A. L. Herczeg, I. McDougall und M. Honda. „U-Th-He dating of apatite: A potential thermochronometer“. Geochimica et Cosmochimica Acta 51, Nr. 10 (Oktober 1987): 2865–68. http://dx.doi.org/10.1016/0016-7037(87)90164-5.

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15

Wieder, R. Kelman, Melanie A. Vile und Kimberli D. Scott. „Cosmogenic 10Be as a potential dating tool in peat“. Biogeochemistry 101, Nr. 1-3 (09.06.2010): 177–82. http://dx.doi.org/10.1007/s10533-010-9468-8.

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16

Sanderson, D. C. W., F. Placido und J. O. Tate. „Scottish vitrified forts: Background and potential for TL dating“. Nuclear Tracks and Radiation Measurements (1982) 10, Nr. 4-6 (Januar 1985): 799–809. http://dx.doi.org/10.1016/0735-245x(85)90093-6.

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17

Zhou, Yuqian. „The Benefits and Dangers of Online Dating Apps“. Canadian Journal of Family and Youth / Le Journal Canadien de Famille et de la Jeunesse 15, Nr. 2 (01.01.2023): 54–62. http://dx.doi.org/10.29173/cjfy29872.

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This research paper focuses on online dating services. It explores the advantages and disadvantages of online dating apps, concluding with a discussion to help users rationalize whether the benefits of dating apps can justify the risks and dangers. Marketers sell consumers the hope that finding a match is guaranteed. As online dating seeps into the modern world, more and more users are experiencing the negative consequences of using dating apps. This paper will include techniques and strategies to help users mitigate these potential harms.

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Pramudiarja, Uyung, Dian Artika und Dhea Hanna Prabawati. „Catfishing Phenomenon in the Perspective of Online Dating Services Users“. Jurnal Ilmiah LISKI (Lingkar Studi Komunikasi) 9, Nr. 1 (24.02.2023): 48. http://dx.doi.org/10.25124/liski.v9i1.5128.

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The presence of online dating in the current digital era makes it easy for users to find their desired potential partner. The problem arises when not all online dating services require users to verify identity. Some users easily fake their identities to make them appear more attractive, known as catfishing behaviour. On the one hand, constructing an identity for a specific purpose is common in online dating services. But on the other hand, it can trigger a psychological impact for potential partners whose expectations are not met, and can even open a loophole for crime. This study wants to see the perception of online dating service users towards the catfishing phenomenon. Using the phenomenological method, this descriptive qualitative research was conducted with in-depth interviews with four informants who use online dating services with varying intensity of use and level of experience. As a result, the informants perceive a natural tendency to construct attractive impressions in online dating services. However, identity discrepancies in online dating services are at some point an unacceptable form of dishonesty. The informants also have their own anticipatory steps to avoid the snares of catfishing, from inviting video calls to doing their own profiling on social media. Keywords: Catfish, Identity, New Media, Online Dating

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Scannell, Meredith Jean. „Online Dating and the Risk of Sexual Assault to College Students“. Building Healthy Academic Communities Journal 3, Nr. 1 (29.05.2019): 34. http://dx.doi.org/10.18061/bhac.v3i1.6688.

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Background: Advances in technology have created different platforms, such as online dating, where college students can meet other people. One serious risk factor of using online dating is the risk of sexual assault. Many sexual predators will use online dating as a method to connect with potential victims who are often vulnerable and trusting.Aim: This paper discusses the risk of sexual assault among college students who use online dating sites. Faculty can be pivotal in educating students on the dangers of online dating and sexual assault. In addition, faculty members are in a position to recognize signs students may be exhibiting after a sexual assault, offer advice, and provide linkage to necessary services.Results: Risk factors of sexual assault are explored in depth, including predatory tactics and the vulnerability specific to college students. Provided are key safety tips for online dating as well as recommendations regarding resources and reporting to law enforcement.Conclusions: Online dating is popular among college students. Educating students in safety factors will enable them to consider the potential dangers and risk of sexual assault. In addition, higher education institutions must consider the needs of students and provide links to resources, support systems and reporting mechanisms.

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Phylatova, Maya, Zakhar Zharnikov, Valentin Barinov, Anna Taynik und Vladimir Myglan. „Dendroarchaeology Potential in Various Natural Areas in West Siberia“. Stratum plus. Archaeology and Cultural Anthropology, Nr. 6 (30.12.2021): 349–60. http://dx.doi.org/10.55086/sp216349360.

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Scientists face with many limitations that affect the success of dendrochronological dating working with archaeological (architectural) sites in Western Siberia. Here we analysed 134 sites and carried out the existing limitations of the method in different natural areas. As a result, a connection between the efficiency of dendrochronological dating and the physical and geographical conditions of sites was found. Created algorithm allowed to assess the potential of dendrochronology for the forest-steppe, taiga and forest-tundra areas of Western Siberia. The scientific results presented in the article can be used to solve the problems of chronology and periodization of archaeological and architectural sites of Western Siberia, as well as to increase the overall efficiency of the application of the dendrochronological method.

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Rasbury, E. Troy, und Jennifer M. Cole. „Directly Dating Sedimentary Rocks“. Paleontological Society Papers 12 (Oktober 2006): 77–105. http://dx.doi.org/10.1017/s1089332600001364.

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This contribution seeks to provide a summary of radiometric dating techniques that are currently applicable to Phanerozoic sedimentary deposits and therefore relevant to paleontologists. First we overview the assumptions necessary for radiometric dating and introduce isochrons and concordia diagrams as methods for calculating ages and evaluating isotope systematics. We then focus on the four most promising systems: U-Pb dating of carbonates, Re-Os dating of black shales, and U-Pb and Lu-Hf dating of phosphates. We review expected geochemical behavior of daughter and parent isotopes in the context of both marine and terrestrial depositional environments. A critical evaluation of previously published ages and potential directions for future work are provided.

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Marom, Anat, James S. O. McCullagh, Thomas F. G. Higham und Robert E. M. Hedges. „Hydroxyproline Dating: Experiments on the 14C Analysis of Contaminated and Low-Collagen Bones“. Radiocarbon 55, Nr. 2 (2013): 698–708. http://dx.doi.org/10.1017/s0033822200057854.

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Dating of the amino acid hydroxyproline from bone collagen has been shown to produce accurate and reliable radiocarbon dates. This article presents further application of the method demonstrating it can be used to obtain dates for both low-collagen and contaminated bones, extending the capability of 14C dating archaeological bone from conventional limits imposed by alternative pretreatment methods. The method therefore has the potential for significantly benefiting the accelerator mass spectrometry (AMS) dating community in the 14C dating of archaeological bone.

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Stahle, David W., Edward R. Cook und James W. C. White. „Tree-Ring Dating of Baldcypress and the Potential for Millennia-Long Chronologies in the Southeast“. American Antiquity 50, Nr. 4 (Oktober 1985): 796–802. http://dx.doi.org/10.2307/280168.

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AbstractThe tree-ring dating of baldcypress has been achieved in the southeastern United States, and the first 500 to 600 year long baldcypress chronologies have been developed from remnant stands of old-growth trees. An 800 year long cypress tree-ring chronology based on living trees and extended with long dead submerged logs has recently been dated, demonstrating the feasibility for very long chronology extension using progressively older sources of preserved cypress wood from old-growth trees, historic buildings, prehistoric archaeological sites, and natural deposits of submerged and buried logs and stumps. The longevity, climate sensitivity, and excellent preservation of ancient baldcypress wood make this species the only realistic prospect for millennia-long tree-ring chronologies extending to the mid-holocene in the Southeast, with important potential applications to the tree-ring dating of prehistoric archaeological sites, paleoclimatic reconstruction, and the calibration of independent dating methods.

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Lauritzen, Stein-Erik, John Erik Haugen, Reidar Løvlie und Helge Gilje-Nielsen. „Geochronological Potential of Isoleucine Epimerization in Calcite Speleothems“. Quaternary Research 41, Nr. 1 (Januar 1994): 52–58. http://dx.doi.org/10.1006/qres.1994.1006.

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AbstractThe extent of isoleucine epimerization in a calcite speleothem was determined to evaluate the amino acid racemization method in abiotic calcite. A 5.5-cm-thick flowstone slab from Hamarnesgrotta, northern Norway, was analyzed for amino acid concentration, composition, and isoleucine epimerization at 26 levels through the sequence. U-series dates provide an independent chronologic control. Epimerization increases monotonically with stratigraphic depth and linearily with U-series age, independent of amino acid concentrations. The rate of epimerization is calibrated against the U-series dates, and extrapolation into lower strata beyond the U-series limit yields absolute age estimates that are consistent with paleomagnetic data from the same speleothem. The results suggest that, if adequately calibrated, amino acid dating is applicable to speleothem material reaching time spans beyond the range of conventional dating methods. Amino acids in the speleothem were probably derived from surface soils and are associated with brown humic stains in the calcite.

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25

Li, Bo, Zenobia Jacobs, Richard Roberts und Sheng-Hua Li. „Review and assessment of the potential of post-IR IRSL dating methods to circumvent the problem of anomalous fading in feldspar luminescence“. Geochronometria 41, Nr. 3 (01.09.2014): 178–201. http://dx.doi.org/10.2478/s13386-013-0160-3.

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AbstractQuartz has been the main mineral used for optically stimulated luminescence (OSL) dating of sediments over the last decade. The quartz OSL signal, however, has been shown to saturate at relatively low doses of ∼200–400 Gy, making it difficult to be used for dating beyond about 200 thou-sand years (ka), unless the environmental dose rate is low. The infrared stimulated luminescence (IRSL) from feldspars has been shown to continue to grow to higher dose levels than quartz OSL. The application of IRSL dating of feldspars, however, has long been hampered by the anomalous fading effect. Recent progress in understanding anomalous fading of the infrared stimulated luminescence (IRSL) signals in potassium-feldspar has led to the development of post-IR IRSL (pIRIR) protocols and also a multiple elevated temperature (MET) stimulation (MET-pIRIR) protocol. These procedures have raised the prospect of isolating a non-fading IRSL component for dating Quaternary deposits containing feldspars. In this study, we review the recent progress made on (1) overcoming anomalous fading of feldspar, and (2) the development of pIRIR dating techniques for feldspar. The potential and problems associated with these methods are discussed.

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Engovatova, A. V., G. I. Zaitseva, M. V. Dobrovolskaya und N. D. Burova. „Potential of the Radiocarbon Method for Dating Known Historical Events: The Case of Yaroslavl, Russia“. Radiocarbon 54, Nr. 3-4 (2012): 615–24. http://dx.doi.org/10.1017/s0033822200047299.

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We address here the methodological question of potentially using the radiocarbon method for dating historical events. The archaeological investigations in Yaroslavl (central Russia) provide an example. The Institute of Archaeology of the Russian Academy of Sciences (IARAS) has been conducting excavations at the site for many years, and many archaeological complexes dating to different times have come to light. The most interesting of these are connected with the founding of the city by Prince Yaroslav the Wise in AD 1010 (the first fortifications) and with the devastation of the city by the Tatar Mongols in 1238 (evidenced by sanitary mass burials of Yaroslavl's inhabitants). We have conducted a certain experiment, a “reverse” investigation of the chronology of the events. The dates of the events are known from chronicles, archaeological materials, and dendrochronological data for several assemblages. We have taken a large series of 14C samples from the same assemblages, dated them in 2 different laboratories, and compared the data. The accuracy of the 14C dates proved to be compatible with dates found via the archaeological material. The article shows the potential for 14C dating of archaeological assemblages connected with known historical events. The results of the research conducted by the authors serve as an additional argument for the broader use of the 14C dating method in studies of archaeological sites related to the Middle Ages in Russia.

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Geyh, Mebus A. „230Th/U-dating of intergarcial and interstadial fen peat and lignite: Potential limits“. E&G Quaternary Science Journal 57, Nr. 1/2 (01.08.2008): 77–94. http://dx.doi.org/10.3285/eg.57.1-2.4.

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Abstract. The state-of-the-art and potential of the 230Th/U disequilibrium method are discussed for the dating of fen peat and lignite. Recommendations are given for the collection of suitable samples. The numerous interfering factors in 230Th/U dating of fen peat show that a rigorous examination of the reliability of the measured data sets is required if reliable 230Th/U ages are to be obtained. The accuracy of such 230Th/U ages allows a reliable correlation of interglacial and interstadial deposits to the warm periods documented in the SPECMAP timescale but does not yet allow detailed temporal resolution.

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Trader, Patrick D. „A Hidden Landscape: Interpreting Buried Archaeological Site Potential in the White River Valley, Indiana“. Midcontinental Journal of Archaeology 48, Nr. 3 (01.10.2023): 203–26. http://dx.doi.org/10.5406/23274271.48.3.02.

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Abstract A model for buried site potential has been developed and presented here following extensive geoarchaeological investigations conducted along the White River valley in Indiana. Backhoe-trenching efforts identified 35 buried archaeological sites dating from the Late Archaic through postcontact periods. Buried archaeological sites were found primarily in soils classified as inceptisols, with fewer found in soils classified as mollisols and entisols. Geochronological dating and artifact analysis suggest that after 3000 BP the White River valley transitioned from lateral to vertical accretion, providing landforms suitable for precontact occupation.

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Phan, Anh, Kathryn Seigfried-Spellar und Kim-Kwang Raymond Choo. „Threaten me softly: A review of potential dating app risks“. Computers in Human Behavior Reports 3 (Januar 2021): 100055. http://dx.doi.org/10.1016/j.chbr.2021.100055.

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Rowe, P. J., J. A. Turner, J. E. Andrews, M. R. Leeder, P. van Calsteren und L. Thomas. „Uranium-thorium dating potential of the marine bivalve Lithophaga lithophaga“. Quaternary Geochronology 30 (Oktober 2015): 80–89. http://dx.doi.org/10.1016/j.quageo.2015.08.003.

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31

Trautmann, T., M. R. Krbetschek, A. Dietrich und W. Stolz. „Investigations of feldspar radioluminescence: potential for a new dating technique“. Radiation Measurements 29, Nr. 3-4 (Mai 1998): 421–25. http://dx.doi.org/10.1016/s1350-4487(98)00012-2.

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Bateman, Mark D., Charles D. Frederick, Manoj K. Jaiswal und Ashok K. Singhvi. „Investigations into the potential effects of pedoturbation on luminescence dating“. Quaternary Science Reviews 22, Nr. 10-13 (Mai 2003): 1169–76. http://dx.doi.org/10.1016/s0277-3791(03)00019-2.

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Fröhlich, K., und R. Gellermann. „On the potential use of uranium isotopes for groundwater dating“. Chemical Geology: Isotope Geoscience section 65, Nr. 1 (März 1987): 67–77. http://dx.doi.org/10.1016/0168-9622(87)90063-7.

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Bartz, Melanie, Jasquelin Peña, Stéphanie Grand und Georgina E. King. „Potential impacts of chemical weathering on feldspar luminescence dating properties“. Geochronology 5, Nr. 1 (02.02.2023): 51–64. http://dx.doi.org/10.5194/gchron-5-51-2023.

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Abstract. Chemical weathering alters the chemical composition of mineral grains. As a result, trapped-charge dating signals of primary silicates may be progressively modified. In this study, we treated three feldspar specimens to understand the effect of proton- and ligand-promoted dissolution on their luminescence properties. We conducted kinetic experiments over 720 h using two solutions: (1) oxalic acid (pH 3, 20 ∘C), an organic acid with chelating abilities, and (2) aqua regia (pH < 1, 40 ∘C), a mixture of strong acids creating aggressive acid hydrolysis conditions. These two solutions were chosen to provoke, on laboratory timescales, some of the changes that may occur on geological timescales as minerals weather in nature. The effect of the extracting solutions on mineral dissolution was investigated by monitoring the concentration of dissolved elements, while changes in feldspar surface morphology were assessed by scanning electron microscopy (SEM). Subsequent changes in feldspar luminescence in the near-UV (∼ 340 nm) and blue (∼ 410 nm) thermoluminescence (TL) and infrared stimulated luminescence (IRSL) emission bands were assessed at the multi- and/or single-grain levels to gain insight into the emission spectra, dose response, saturation, and anomalous fading characteristics of the feldspars. In all experiments, only minor feldspar dissolution was observed after 720 h. In general, aqua regia, the more chemically aggressive solution, had a larger effect on feldspar dissolution compared to that of oxalic acid. Additionally, our results showed that although the TL and IRSL intensities changed slightly with increasing artificial weathering time, the feldspar luminescence properties were otherwise unmodified. This suggests that chemical alteration of feldspar surfaces may not affect luminescence dating signals obtained from natural samples.

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Wang, Yang, A. Hope Jahren und Ronald Amundson. „Potential for14C Dating of Biogenic Carbonate in Hackberry (Celtis) Endocarps“. Quaternary Research 47, Nr. 3 (Mai 1997): 337–43. http://dx.doi.org/10.1006/qres.1997.1894.

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Hackberry endocarp (Celtissp.) contains significant amounts (up to 70 wt%) of biogenic carbonate that is nearly pure aragonite (CaCO3). Because of their high mineral content, hackberry endocarps are found abundantly in Tertiary and Quaternary sediments and are very common in many North American archaeological sites. We analyzed the14C content of different components of modern hackberries including the biogenic carbonate in hackberry endocarps collected at known times over the past century. The14C content of the endocarp carbonate accurately records the14C content of the atmosphere.14C dates of fossil endocarp carbonates compared favorably with dates obtained by other means at archaeological and geological sites ranging in age from the late Pleistocene through the early Holocene. We therefore suggest that hackberry endocarp is a suitable substrate for14C dating provided that its morphological and mineralogical integrity is preserved.

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Zhang, Junjie, und Sheng-Hua Li. „Review of the Post-IR IRSL Dating Protocols of K-Feldspar“. Methods and Protocols 3, Nr. 1 (14.01.2020): 7. http://dx.doi.org/10.3390/mps3010007.

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Compared to quartz, the infrared stimulated luminescence (IRSL) of K-feldspar saturates at higher dose, which has great potential for extending the dating limit. However, dating applications with K-feldspar has been hampered due to anomalous fading of the IRSL signal. The post-IR IRSL (pIRIR) signal of K-feldspar stimulated at a higher temperature after a prior low-temperature IR stimulation has significantly lower fading rate. Different dating protocols have been proposed with the pIRIR signals and successful dating applications have been made. In this study, we review the development of various pIRIR dating protocols, and compare their performance in estimating the equivalent dose (De). Standard growth curves (SGCs) of the pIRIR signals of K-feldspar are introduced. Single-grain K-feldspar pIRIR dating is presented and the existing problems are discussed.

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Alæk Dugstad, Sigrid. „Small sites, great potential“. In Situ Archaeologica 14 (01.06.2020): 109–18. http://dx.doi.org/10.58323/insi.v14.9328.

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This paper looks at small Mesolithic sites with limited artefacts assemblages from Rogaland. A common characteristic of these sites is that they tend to lie in the vicinity of larger sites that contain a range of tool types and more extensive assemblages. The modest, rather unvaried artefacts from such smaller sites are indicative of specialized activities. In many cases both dating and location in the landscape suggest that these sites were integrated into larger nearby dwelling sites. This potential connection between larger dwellings and smaller adjacent activity sites challenges our perceptions of how settlement systems functioned.

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Ilger, Wayne, Marian Hyman, John Southon und Marvin Rowe. „Dating Pictographs with Radiocarbon“. Radiocarbon 37, Nr. 2 (1995): 299–310. http://dx.doi.org/10.1017/s0033822200030770.

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We report here progress on our technique for14C dating pictographs. We use low-temperature oxygen plasmas coupled with high-vacuum techniques to selectively remove carbon-containing material in the paints without contamination from rock substrates or accretions. We dated >16 pictograph samples that generally agree with ages expected on the basis of archaeological inference. We have shown that carbonate and calcium oxalate decomposition does not occur during our procedure; little mass fractionation is produced. We also used the technique on samples of known14C activity. In each case our results agree with previously determined ages of archaeological charcoal samples. Two samples of the standard Third International Radiocarbon Intercomparison wood yielded ages in near accord with the accepted value. We used14C-free samples to establish that the method and apparatus do not have a significant live carbon background. Each of these determinations supports our conclusion that the technique has the potential of producing accurate and reliable ages. However, background organic material in the basal rocks and accretions can be troublesome, often completely negating the dates obtained.

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Holmes, Kristin, und Leo Sher. „Dating violence and suicidal behavior in adolescents“. International Journal of Adolescent Medicine and Health 25, Nr. 3 (01.09.2013): 257–61. http://dx.doi.org/10.1515/ijamh-2013-0059.

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Abstract The aim of this paper is to assess the possible consequences of adolescent physical, emotional and sexual dating violence through a review of the literature on the topic. An electronic search of major biomedical bibliographic databases (Pubmed, ISI, PsycINFO) was used to retrieve articles providing information on the prevalence rates, risk factors, associated consequences and possible preventive measures for adolescent dating violence across different populations. Currently, there have been few longitudinal studies conducted to identify potential risk factors for entering a violent dating relationship in adolescence. Risky behaviors such as early sexual intercourse may predispose someone for victimization. Dating violence itself is also a predictor of future dating violence. Adolescent dating violence was associated with an increase in other violence-related behaviors, substance use, depression, poorer educational outcomes, posttraumatic stress, unhealthy weight control and risky sexual behavior. The association between adolescent dating violence and an increase in suicidal behavior is a major public health concern. Future research should focus on longitudinal studies so that a causal relationship between dating violence and suicidality may be better understood.

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Rajaguru, Sharad, Bhaskar Deotare, Kaushik Gangopadhyay, Malay Sain und Sheena Panja. „Potential geoarchaeological sites for luminescence dating in the Ganga Bhagirathi-Hugli delta, west Bengal, India“. Geochronometria 38, Nr. 3 (01.09.2011): 282–91. http://dx.doi.org/10.2478/s13386-011-0041-6.

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Abstract Archaeological studies in the upper and lower part of the Ganga-Bhaghrathi-Hugli delta were taken up to understand the nature of site formation and human adaptation in a dynamic fluvial zone. This aspect has been neglected in Indian archaeology. However archaeological dating using typological information, has an error margin of a couple of centuries and hence, is of limited use. We suggest that high resolution chronology using Optically Stimulated Luminescence (OSL) and radiocarbon dating can be quite effective in the study of archaeology and human environment relationship in the Ganga-Brahmaputra Delta (GBD).

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Lee, Jae-Ho, Hyun-Min Jeong, Masaki Sano und Jeong-Wook Seo. „Investigating the Potential of the Tree-ring δ18O Time Series of Pinus thunbergii in the Dendroarchaeological Study“. Journal of Conservation Science 39, Nr. 3 (20.09.2023): 288–96. http://dx.doi.org/10.12654/jcs.2023.39.3.10.

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The main content of dendroarchaeology is to assign the exact calendar year to each tree ring in archaeological wood. Each tree ring can be assigned a year because the pattern of ring-width time series (hereafter, ring-width chronology) is unique for each time period and the same tree species share the pattern. However, the lack of agreement between ring-width chronologies of <i>Pinus thunbergii</i> compared to other tree species makes it difficult to use the chronologies for dating. This study was conducted to verify the dating possibility of archaeological woods using tree-ring δ<sup>18</sup>O time series (hereafter, tree-ring δ<sup>18</sup>O chronology) instead of ring-width chronology. For the study, 7 <i>P. thunbergii</i> were selected from coastal dunes, and the ring-width and tree-ring δ<sup>18</sup>O chronologies were compared. The results showed that the agreement between ring-width chronologies were large statistical deviations (<i>t</i>-value: 0.6~12.5 / G value: 38~70%) as much as difficult for dating. On the other hand, the tree-ring δ<sup>18</sup>O chronologies showed reliable agreement between them as statistically (<i>t</i>-value: 4.3~6.4 / G value: 77~84%) and visually. Based on the results, it has been verified that the dating possibility of archaeological woods for <i>P. thunbergii</i>, which is a difficult tree species for dating in dendrochronology, can be greatly improved if the tree-ring δ<sup>18</sup>O chronology is applied.

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Hajdas, I., S. Ivy-Ochs, R. Pickering und F. Preussner. „Recent developments in Quaternary dating methods“. Geographica Helvetica 63, Nr. 3 (30.09.2008): 176–80. http://dx.doi.org/10.5194/gh-63-176-2008.

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Abstract. An overview of methods to numerically date continental Quaternary deposits is provided including radiocarbon, Uranium series, cosmogenic nuclides, luminescence and electron spin resonance. Physical background and methodology are briefly described and potential problems as well as recent developments in the field are highlighted.

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Schröder–Abé, Michela, Katrin Rentzsch, Jens B. Asendorpf und Lars Penke. „Good Enough for An Affair. Self–Enhancement of Attractiveness, Interest in Potential Mates and Popularity as A Mate“. European Journal of Personality 30, Nr. 1 (Januar 2016): 12–18. http://dx.doi.org/10.1002/per.2029.

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Using data from the Berlin Speed Dating Study, we tested rival hypotheses concerning the effects of self–enhancement of attractiveness on dating outcomes. Three hundred eighty–two participants took part in one of the 17 speed–dating sessions. After each speed–dating interaction, participants indicated how interesting they found the respective person as a long–term and short–term partner. Using social relations analyses, we computed perceiver effects (being more or less choosy) and target effects (being rated as more or less interesting) of long–term and short–term partner ratings. Self–enhancement was operationalized as the discrepancy between self–rated attractiveness and four components of actual attractiveness (observer–rated facial and vocal attractiveness, height and body mass index). Results indicated that self–enhancers were less choosy with respect to their interest for short–term partners, which was especially true for men, but more choosy with respect to long–term partners. With regard to popularity as a mate, potential partners indicated that they found self–enhancers more interesting as short–term partners but not as long–term partners. As self–enhancement is a key component of narcissism, these results are consistent with findings that narcissists perceive many sexual affairs as an achievement, while preferring selected ‘trophy’ long–term partners, and narcissists have a charming appeal for short–term, but not lasting, social relationships. Copyright © 2015 European Association of Personality Psychology

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Akcar, Naki, Susan Ivy-Ochs und Christian Schlüchter. „Application of in-situ produced terrestrial cosmogenic nuclides to archaeology: A schematic review“. E&G Quaternary Science Journal 57, Nr. 1/2 (01.08.2008): 226–38. http://dx.doi.org/10.3285/eg.57.1-2.9.

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Abstract. The wide applicability of in-situ produced Terrestrial Cosmogenic Nuclides (TCNs) to geological problems and experiences in development and testing gained over the past decade is encouraging for its application to archaeological questions, where there is a distinct need for an additional independent dating tool beyond the limits of radiocarbon (~ 40 ka). Just as TCNs are applicable to a broader time period with considerable precision in archaeology, so also are they applicable to all lithologies. Application of TCNs to archaeological problems is relatively simple: either surface exposure dating (using cosmogenic nuclide production) or burial dating (using decay of radioactive cosmogenic nuclides) can be applied. For a successful application, close collaboration between archaeologists and TCN experts is required. The total exposure from 100 a to 5 Ma of a given surface of archaeological origin can be determined by surface exposure dating. The range of burial dating is from ~0.1 to 5 Ma. TCNs have been successfully applied to many archaeological problems during the last decade and both surface exposure dating and burial dating show high potential in the solving of archaeological problems.

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Strauss, Catherine V., Tara L. Cornelius und Ryan C. Shorey. „Stalking Perpetration in Dating Relationships: The Role of Anger Management and Emotion Regulation“. Partner Abuse 9, Nr. 3 (Juni 2018): 249–69. http://dx.doi.org/10.1891/1946-6560.9.3.249.

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Stalking is a form of dating violence that has typically been studied after relationship termination, despite evidence suggesting that stalking often occurs within current dating relationships. Consequently, there is a dearth of research on correlates of stalking perpetration among intact dating relationships. Therefore, the aim of the current study was to examine correlates of stalking perpetration among college men and women in intact dating relationships (N = 627) in order to identify possible risk factors for stalking perpetration. Using the dating violence literature and theoretical models for intimate partner violence perpetration as a guide, two potential correlates of stalking were examined: emotion regulation and anger management. Results demonstrated that anger management was positively correlated with stalking perpetration in men and women, and emotion regulation was also consistently correlated to stalking perpetration in women. Given that this is the first known study to examine correlates of stalking perpetration behaviors in dating college students, our findings provide a base from which additional investigations can be developed.

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Zhou, Weijian, M. J. Head und Lauri Kaihola. „Small Sample Dating in China“. Radiocarbon 36, Nr. 1 (1994): 47–49. http://dx.doi.org/10.1017/s0033822200014314.

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The Xi'an Laboratory of Loess and Quaternary Geology has developed a small sample 14C dating facility consisting of a Wallac 1220 Quantulus™ liquid scintillation spectrometer, and a miniature benzene synthesis line based on the synthesis procedures used at the Australian National University (ANU). This line can produce ca. 0.3-ml benzene samples, which are then measured for 14C activity using 0.3-ml Teflon vials developed by Wallac Oy. The counting performance of the Quantulus™ spectrometer using 0.3-ml vials has been evaluated, and a potential age limit of ca. 45,000 BP has been obtained for samples containing up to 250 mg carbon. This dating facility fills the gap between large sample (2.4–6 g carbon) and microsample (<1 mg carbon) handling to form a 14C dating method sequence.

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Sigl, M., T. M. Jenk, T. Kellerhals, S. Szidat, H. W. Gäggeler, L. Wacker, H. A. Synal et al. „Towards radiocarbon dating of ice cores“. Journal of Glaciology 55, Nr. 194 (2009): 985–96. http://dx.doi.org/10.3189/002214309790794922.

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AbstractA recently developed dating method for glacier ice, based on the analysis of radiocarbon in carbonaceous aerosol particles, is thoroughly investigated. We discuss the potential of this method to achieve a reliable dating using examples from a mid- and a low-latitude ice core. Two series of samples from Colle Gnifetti (4450 m a.s.l., Swiss Alps) and Nevado Illimani (6300 m a.s.l., Bolivian Andes) demonstrate that the 14C ages deduced from the water-insoluble organic carbon fraction represent the age of the ice. Sample sizes ranged between 7 and 100 μg carbon. For validation we compare our results with those from independent dating. This new method is thought to have major implications for dating non-polar ice cores in the future, as it provides complementary age information for time periods not accessible with common dating techniques.

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Li, Wurui, Bo Xu, Zhuang Miao, Zheyi Zhao und Hangyu Liu. „Exploring the CAM18 Crystal as a Potential Reference Material for U–Pb Analysis of Zircon“. Crystals 13, Nr. 9 (11.09.2023): 1364. http://dx.doi.org/10.3390/cryst13091364.

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In the process of in situ zircon U–Pb dating, it is an effective means to overcome the matrix effect by using a matrix-matched external reference material. However, the limited number of available zircon reference materials still makes it difficult to meet the research needs. In this paper, we performed a preliminary analysis of the gemological characteristics, trace elements and U–Pb ages of natural zircon CAM18 to assess its suitability as a reference material for laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) U–Pb dating. This tawny, gem-quality zircon has no visible inclusions and weighs approximately 0.55 g. Its density, full width at half maximum (FWHM) of the Raman peak and alpha flux (Dα) indicate that the sample has suffered mild-to-moderate radiation damage without any thermal treatment. The LA-ICP-MS U–Pb dating results reveal that the trace elements content and U–Pb ages of the sample are fairly homogeneous at the 50 μm scale, and there is no obvious loss of radiogenic Pb. The 206Pb/238U age (571.0 ± 3.0 Ma, 2s) and 207Pb/235U age (573.4 ± 6.0 Ma, 2s) are consistent within the analytical uncertainty, and the calculated concordia age is 571.4 ± 1.4 Ma (2s, n = 20). The variation in the 206Pb/238U ages is small, with a measurement repeatability of 0.46% (RSD), which is within the uncertainty of the age accuracy obtained by LA-ICP-MS. The oscillatory zoning, Th/U ratio (0.2) and chondrite-normalized rare-earth element (REE) pattern imply a magmatic origin of zircon CAM18. The Ti-in-zircon temperature ranges from 714 to 742 °C, and the oxygen fugacity ranges from ΔFMQ−2.87 to ΔFMQ−3.17, suggesting that it is crystallized in a reducing environment. All the results show that zircon CAM18 may has great potential in LA-ICP-MS U–Pb dating.

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Abubakar, Adamu, Nur Irdina Mohd Noorani und Ummu Syafiqah Mohd Rashidi. „Understanding Muslims Self-presentation Strategies in Online Dating“. International Journal on Perceptive and Cognitive Computing 6, Nr. 2 (14.12.2020): 81–89. http://dx.doi.org/10.31436/ijpcc.v6i2.163.

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This paper investigates the factors influencing online self-presentation strategies on dating platforms, and explore how Muslims users manage their online presentation on dating approach –associated with Muslim-oriented dating application and mainstream-oriented dating application in order to accomplish the goal of finding partner. Twenty-profiles from Tinder and MusMatch active online dating user was used for the study. Qualitative content analysis was used to explore the approaches of interactions associated with individual self-presentation. Four main themes were generated: Screen names, Terminal identities, Net Presence and Personal Profile. The findings reveal that both MusMatch and Tinder allow its users to choose their own screen names without any restrictions. The platforms showed how screen names can be used as a strategy to present certain impression. Users tend to post their personal interests in order to attract their potential partners on Tinder as well as MuzMatch. Users of MuzMatch used acronyms to identify themselves, whereas, users of Tinders are free to construct a socially desirable identity that may attract people’s attention and publicity. The frequency with which MusMatch users appear to interact for relationship that leads to marriage is far more than any other form of relationship. Tinder users are free to post anything as their profile picture, whereas in MuzMatch it requires authentic profile pictures. MusMatch provision for establishing relationship requires that a chaperone should be allow to mediate interactions among the potential partners in order to preserve Muslims-oriented dating style

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Wang, Ye, Zhicong Lu und Roger Wattenhofer. „Gay Dating on Non-dating Platforms: The Case of Online Dating Activities of Gay Men on a Q&A Platform“. Proceedings of the ACM on Human-Computer Interaction 6, CSCW2 (07.11.2022): 1–23. http://dx.doi.org/10.1145/3555189.

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Gay dating applications, such as Grindr and SCRUFF, are considered the primary platforms for gay men to conduct online dating activities. However, on Zhihu, a Chinese question-and-answer website, tens of thousands of homosexual users have been searching for romantic partners, which suggests that Zhihu may have unique affordances in online dating activities for Chinese gay men. To better understand how Chinese gay men perceive the affordances of a non-dating platform for online dating, we conduct a mixed-methods study, including observations, interviews, and quantitative and qualitative analysis of users' self-presentations. We find that gay men users publish personal ads by answering "fishing questions" on Zhihu. Through our analysis, we examine how users perceive the affordances of Zhihu to satisfy their social and psychological gratifications at the self, community, and audience levels. Although gay users face the risk of disclosing homosexual identity on mainstream social media, they perceive such risk as acceptable for better online dating experience. We discuss how users respond to severe social stigma in China, and the gap between user needs and the design of gay dating applications. We elaborate on the implications of our findings to discuss the potential benefits for LGBTQ users if LGBTQ service providers collaborate with social media.

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