An isochron method for cosmogenic-nuclide dating of buried soils and sediments

GSA Bulletin ; 79 3 : — It is deduced that the revolutionary phase of the orogeny extended from early Triassic to early Cretaceous; folding of the geosynclinal sediments and accompanying recrystallization of the limestones terminated in late Jurassic, but granitic activity extended to early Cretaceous. A post-orogenic phase of granitic intrusion, accompanied by secondary calcite veining of the limestones, occurred in early Tertiary and appears to be confined to a narrow zone along the western margins of the Main Range batholith. Shibboleth Sign In. OpenAthens Sign In. Institutional Sign In. Sign In or Create an Account. User Tools. Sign In.

NOTUNG: A Program for Dating Gene Duplications and Optimizing Gene Family Trees

The TS Turin Shroud is a linen cloth which enveloped the dead body of a tortured and crucified man that is believed by many to be the burial cloth of Jesus Christ. The linen fabric has been radiocarbon dated in to the Middle Age but a recent robust statistical analysis shows that the resulting age appears flawed by a systematic effect. The present paper discusses the results obtained using innovative dating methods based on the analysis of mechanical parameters breaking strength, Young modulus and loss factor and of opto-chemical ones FT-IR and Raman.

To obtain mechanical results it was necessary to build a particular cycling-loads machine able to measure the mechanical parameters of single flax fibers mm long. While this date is both compatible with the time in which Jesus Christ lived in Palestine and with very recent results based on numismatic dating, it is not compatible with the radiocarbon measurements that should be repeated after the necessary clarifications relative to the possible environmental factors that could have biased the results.

The dates are further divided between Pleistocene (, cal. years BP) and carbon dating‘, Nature ,

Montuori 1 , P. Di Matteo 2 , M. Lehnert 2 , F. Combes 3 and B. Semelin 3. Aldo Moro 2, Rome, Italy e-mail: montuorm roma1. Received: 22 February Accepted: 18 May Strong inflows of gas from the outer disk to the inner kiloparsecs are induced during the interaction of disk galaxies.

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Dating applications apps on smartphones have become increasingly popular. The aim of this study was to explore the association between the use of dating apps and risky sexual behaviours. Data were collected in four university campuses in Hong Kong. Subjects completed a structured questionnaire asking about the use of dating apps, sexual behaviours, and sociodemographics. Multiple linear and logistics regressions were used to explore factors associated with sexual risk behaviours.

Six hundred sixty-six subjects were included in the data analysis.

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Quartz is the datable component in mortar. Although its luminescence properties are very well studied, the problem of mortar dating arises from a low level of optical bleaching. In order to reduce the time consuming efforts for dating lime mortar in monuments by optically stimulated luminescence, we investigated the most suitable methods of dose and dose rate determination, and we explored tests which are suitable to predict the datability of a given material.

Reverting to the large number of publications on sedimentary partially bleached quartz we found linear modulation techniques especially useful, equally we also recommend the determination of the level of optical depletion before starting analyses. Single grain analysis is regarded as an ultimate but infallible tool to date very poorly bleached quartz from mortar. Dose rate measurements need to take into account the radioactive equilibrium of the uranium decay and the short range inhomogeneity of the environmental gamma radiation field: gamma spectrometry and on-site TLD measurements are best suited.

Dose-rate conversion factors: update.

Telescoping in dating naturally occurring events

In the last years the mortar dating through Optically Stimulated Luminescence OSL techniques has become a viable support for chronological estimations date of construction or restoration episodes of historical buildings. However, the dating of mortar has still open issues mainly regarding the assessment of the bleaching degree of quartz, the analysis of the OSL processes for this type of samples and the need to do appropriate tests for the most correct evaluation of the equivalent dose.

This paper discusses the results obtained by OSL dating blue diode stimulation on the polymineral fine grain phase, enriched in quartz, extracted from lime mortar samples collected from different sites. Thermal transfer effects, through the behaviour of Equivalent Dose ED and recovery tests, degree and time of bleaching were studied. For each mortar sample the adjacent brick was collected; in some cases, sampling of the bricks bracketing a mortar layer was a possibility, thus obtaining a direct comparison with the standard thermoluminescence TL dating on the bricks.

The dilution peak, metallicity evolution, and dating of galaxy interactions and mergers. M. Montuori1, P. Di Matteo2, M. D. Lehnert2, F. Combes3 and B. Semelin3.

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After controlling for the effects of potentially confounding demographics and risk behaviors, data from both surveys indicate that physical and sexual dating.

Dating apps on smartphones have brought speed dating on the Internet to a new level. This exploratory investigation sought to determine what kinds of people use these apps, what their motivations are, and what precautions they take before meeting someone. One hundred and seventy-three non-users and 57 current users of dating apps were surveyed.

The data suggest that the strongest motive for using dating apps is not for dating or sex, but for entertainment. On the other hand, the more frequent users of these apps are people whose personalities are predisposed towards varied sexual partners. These different motives may represent a disconnect between those who wish to kill time and those who are seeking sexual partners. Authors retain copyright to their work published in First Monday.

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Canadian Journal of Fisheries and Aquatic Sciences

The analysis of masculinity has been a topic of growing interest in recent decades. Its study has incorporated a wide and diverse range of research areas and themes, including the representation of gender relations and identities on the Internet. Specifically, this article concerns the research area related to online dating websites and aims to compare the principal current tendencies related to identity -as provided by research on masculinity- with the way that men present themselves on two Spanish dating websites: Meetic.

Two studies examined the relations between self-monitoring and motivations for forming and maintaining romantic relationships. Investigation 1 revealed that.

Research among adults has shown that younger age is a consistent risk factor for experiencing and perpetrating intimate partner violence. However, no representative epidemiologic studies of lifetime prevalence of dating violence among adolescents have been conducted. After controlling for the effects of potentially confounding demographics and risk behaviors, data from both surveys indicate that physical and sexual dating violence against adolescent girls is associated with increased risk of substance use eg, cocaine use for , odds ratio [OR], 4.

Intimate partner violence IPV against women is a major public health concern. Estimates from a recent large-scale, nationally representative survey 1 indicate that more than 1. Research among adults has shown that younger age is a consistent risk factor for experiencing and perpetrating IPV. Most IPV is directed at women. The rate of violence against females by intimate partners is 3 to 6 times that of IPV against males.

For these reasons, research and prevention efforts are appropriately focused on violence against female partners. Recent events involving fatal violence perpetrated by adolescents have focused additional attention on all forms of youth violence, 11 and there are increasing calls for epidemiologic study of IPV against adolescent girls, 12 in particular. A broad range of physical and mental health concerns have been shown to be associated with IPV among women, 13 and similar morbidity risks are considered likely for adolescents.

Public health surveillance surveys represent an important opportunity to collect representative data on the extent of behaviors or experiences that threaten the health of young people and to examine associations among these risk factors.

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