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Full-Text Articles in Social and Behavioral Sciences
Determining The Cooling Age Using Luminescence-Thermochronology, Bo Li, Sheng-Hua Li
Determining The Cooling Age Using Luminescence-Thermochronology, Bo Li, Sheng-Hua Li
Faculty of Science, Medicine and Health - Papers: part A
Luminescence technique has been shown to have great potential in low-temperature (< 100 °C) themochronology. This study investigates the kinetic process of luminescence in a cooling system. We present a new formula that can be used for determining the cooling age based on luminescence-thermochronology. The cooling rate can be obtained directly from a plot of luminescence age versus the present temperature. We show that the application and capacity of luminescence-thermochronology are significantly controlled by the saturation of luminescence and environmental dose rate.
The Tangarutu Invertebrate Fauna, Katherine Szabo, Atholl Anderson
The Tangarutu Invertebrate Fauna, Katherine Szabo, Atholl Anderson
Faculty of Science, Medicine and Health - Papers: part A
The island of Rapa presents an interesting lens through which to investigate human decisionmaking and resource-use patterns in a marginal environment. In addition to being small and isolated, Rapa is climatically marginal, being positioned on the southern fringe of the tropical Indo-West Pacific marine province. Most obviously, this geographical situation translates to restricted species diversity, with a great many common tropical taxa not able to survive the conditions. However, as pointed out by Preece (1995:345), it would be a mistake to see the marine fauna of marginal Polynesian islands as simply an impoverished subset of the tropical Indo-West Pacific community. …
Study Of The Relationship Between Infrared Stimulated Luminescence And Blue Light Stimulated Luminescence For Potassium-Feldspar From Sediments, Zhijun Gong, Bo Li, Sheng-Hua Li
Study Of The Relationship Between Infrared Stimulated Luminescence And Blue Light Stimulated Luminescence For Potassium-Feldspar From Sediments, Zhijun Gong, Bo Li, Sheng-Hua Li
Faculty of Science, Medicine and Health - Papers: part A
In luminescence measurements of potassium-feldspar (K-feldspar), both infrared (IR) and blue light (BL) can be used as stimulation sources. Component analysis suggests that the blue light stimulated luminescence (BLSL) measured at 60 °C from K-feldspar can be fitted using three components, namely fast, medium and slow. In order to explore the relationship between the origin of the infrared stimulated luminescence (IRSL) signal and the different components of the BLSL, five sets of experiments were conducted, namely post-IR BLSL (pIR-BLSL), post-BL IRSL (pBL-IRSL), pulse annealing tests, dose response and laboratory fading rate tests. It is observed that most of the IRSL …
Holocene Environmental Changes In Central Inner Mongolia Revealed By Luminescence Dating Of Sediments From The Sala Us River Valley, Sheng-Hua Li, Jimin Sun, Bo Li
Holocene Environmental Changes In Central Inner Mongolia Revealed By Luminescence Dating Of Sediments From The Sala Us River Valley, Sheng-Hua Li, Jimin Sun, Bo Li
Faculty of Science, Medicine and Health - Papers: part A
Luminescence dating of the fluvial and lacustrine sediments from the Sala Us River valley at the south edge of the Mu Us Desert, central Inner Mongolia, is reported. The study region lies in the northwestern marginal zone of the east Asian summer monsoon and is sensitive to climate change. The dating results combined with environmental proxies indicate that the Holocene Climate Optimum period, took place from 8.5 to 5 ka ago and was marked by lake development. After ~5 ka ago, the region became arid, as inferred from lake regression and fluvial activity. Deposition of fluvial sediments lasted from ~5 …
Experimental And Computational Simulation Of Beta-Dose Heterogeneity In Sediment, Alastair C. Cunningham, Daniel J. De Vries, Dennis R. Schaart
Experimental And Computational Simulation Of Beta-Dose Heterogeneity In Sediment, Alastair C. Cunningham, Daniel J. De Vries, Dennis R. Schaart
Faculty of Science, Medicine and Health - Papers: part A
Interpreting the spread in equivalent-dose estimates is an important aspect of optically stimulated luminescence (OSL) dating. Ideally, prior to age estimation, an assessment should be made of the likely spread in equivalent dose due to dose-rate heterogeneity in the sediment. Such a procedure would greatly increase the validity of OSL ages, particularly for sediments susceptible to partial bleaching, and for sediments with coarse or poorly sorted grain-size distributions. In this paper we take a step towards a general model of dose-rate heterogeneity by simulating the 40K-derived beta dose to quartz. We present an experimental simulation of the 40K beta dose, …
Fossils Of Stegodon And Varanus Komodoensis Sumba And Flores: A Pleistocene Landbridge, Erick Setiyabudi, Iwan Kurniawan, Gerrit Van Den Bergh
Fossils Of Stegodon And Varanus Komodoensis Sumba And Flores: A Pleistocene Landbridge, Erick Setiyabudi, Iwan Kurniawan, Gerrit Van Den Bergh
Faculty of Science, Medicine and Health - Papers: part A
Abstract of a paper that presented at the 2012 Ikatan Ahli Geologi Indonesia Annual Meeting.
Approximating The Face Of 'Aunty': A Question Of Likeness, Susan Hayes, Hallie Buckley, Richard Bradley, Nick Milne, John Dennison
Approximating The Face Of 'Aunty': A Question Of Likeness, Susan Hayes, Hallie Buckley, Richard Bradley, Nick Milne, John Dennison
Faculty of Science, Medicine and Health - Papers: part A
This paper describes two approaches to the facial approximation of three individuals from the Wairau Bar burial site (New Zealand). Two individuals were approximated working in direct reference to the remains and incorporated manual drafting. The third individual, 'Aunty' (the respectful title given by the iwi Rangitane elders) was approximated from CT scans and using computer graphics. The computer graphic approach enabled a greater level of precision in the application of the research and recommendations that inform a facial approximation, and facilitated collaboration with appropriate expertise. The computer-graphic approach, however, also resulted in a more photographic facial appearance, which can …
Archaeological Science In Australia: Integrating Across Disciplines And Scales Of Analysis, Zenobia Jacobs
Archaeological Science In Australia: Integrating Across Disciplines And Scales Of Analysis, Zenobia Jacobs
Faculty of Science, Medicine and Health - Papers: part A
The basic questions in prehistoric archaeology have not changed much over the last forty years. In Australia, we continue to debate when and where Australia and its arid interior were first colonised, and whether or not these early colonisers were responsible for the extinction of the Australian megafauna. These questions are broad and any answers involve interdisciplinary teamwork that crosses conventional academic boundaries - the humanities and sciences.
Realizing The Potential Of Fluvial Archives Using Robust Osl Chronologies, Alastair C. Cunningham, Jakob Wallinga
Realizing The Potential Of Fluvial Archives Using Robust Osl Chronologies, Alastair C. Cunningham, Jakob Wallinga
Faculty of Science, Medicine and Health - Papers: part A
Optically Stimulated Luminescence (OSL) dating has enormous potential for interpreting fluvial sediments, because the mineral grains used for OSL dating are abundant in fluvial deposits. However, the limited light exposure of mineral grains during fluvial transport and deposition often leads to scatter and inaccuracy in OSL dating results. Here we present a statistical protocol which aims to overcome these difficulties. Rather than estimating a single burial age for a sample, we present ages as likelihood functions created by bootstrap re-sampling of the equivalent-dose data. The bootstrap likelihoods incorporate uncertainty from age-model parameters and plausible variation in the input data. This …
Pleistocene Survivors And Holocene Extinctions: The Giant Rats From Liang Bua (Flores, Indonesia), Elisa Locatelli, Rokhus Awe Due, Gerrit D. Van Den Bergh, Lars W. Van Den Hoek Ostende
Pleistocene Survivors And Holocene Extinctions: The Giant Rats From Liang Bua (Flores, Indonesia), Elisa Locatelli, Rokhus Awe Due, Gerrit D. Van Den Bergh, Lars W. Van Den Hoek Ostende
Faculty of Science, Medicine and Health - Papers: part A
Excavations at Liang Bua Cave yielded a large amount of micromammal remains, the major part of which are murids, and some can be referred to three different species of giant rats. Whilst Papagomys armandvillei is still living on Flores, the other two species, Papagomys theodorverhoeveni and Spelaeomys florensis went extinct late during the Holocene. In this paper, the fossil record of these species at Liang Bua Cave is discussed. These giant murids are a clear example of insular gigantism, and can be seen as end members of the Island Rule. Opposition against the general applicability of this 'rule' is mainly …