scholarly journals The Early to Late Paleolithic Transition in Korea: A Closer Look

Radiocarbon ◽  
2013 ◽  
Vol 55 (3) ◽  
pp. 1341-1349 ◽  
Author(s):  
Christopher J Bae ◽  
Kidong Bae ◽  
Jong Chan Kim
Keyword(s):  
Mass Spectrometry ◽  
Northeast China ◽  
Northern China ◽  
Stone Tool ◽  
Late Paleolithic ◽  
National University ◽  
Type Site ◽  
Paleolithic Archaeology ◽  
Seoul National University ◽  
Ams Dates

In Korean Paleolithic archaeology, it is traditionally thought that the Late Paleolithic stone tool industries were in some way derived from the Shuidonggou site in northern China. The latter site has long been considered to be the type site of the eastern Asian Late Paleolithic blade technology. However, recent studies suggest that a number of Korean Late Paleolithic sites probably predate Shuidonggou, some by several thousands of years. Here, we present a series of accelerator mass spectrometry (AMS) dates recently analyzed by the AMS laboratory at Seoul National University and discuss further the possibility that the introduction of blade (and later microblade) technologies into Korea may have originated directly from Mongolia, Siberia, and possibly other areas of northeast China, rather than from Shuidonggou.

scholarly journals Progress at the Seoul National University AMS Facility

Radiocarbon ◽  
2001 ◽  
Vol 43 (2A) ◽  
pp. 163-167 ◽  
Author(s):  
J C Kim ◽  
J H Park ◽  
I C Kim ◽  
C Lee ◽  
M K Cheoun ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Accelerator Mass Spectrometry ◽  
Performance Test ◽  
Conventional Technique ◽  
National University ◽  
Mass Spectrometry Facility ◽  
Seoul National University ◽  
Accelerator System

The accelerator mass spectrometry facility at the Seoul National University (SNU-AMS) was completed in December 1998 and a report was presented at the Vienna AMS conference in September 1999. At the conference, we described the basic components of our accelerator system and reported the results of the performance test. Since then, extensive testing of the accuracy and reproducibility of the system has been carried out, and about 200 unknown samples have been measured so far. We obtained a precision of 4‰ for modern samples, and an accuracy of approximately 40 yr was demonstrated by analyzing samples that were previously dated with a conventional technique and by other AMS laboratories. We present these results here, together with detailed descriptions of our data-taking and analysis procedures.

scholarly journals The Late Paleolithic-Neolithic Transition in Korea: Current Archaeological and Radiocarbon Perspectives

Radiocarbon ◽  
2010 ◽  
Vol 52 (2) ◽  
pp. 493-499 ◽  
Author(s):  
Christopher J Bae ◽  
Jong Chan Kim
Keyword(s):  
Mass Spectrometry ◽  
Eastern China ◽  
Northern China ◽  
Early Neolithic ◽  
Radiocarbon Dates ◽  
Causal Factors ◽  
Neolithic Transition ◽  
Late Paleolithic ◽  
China And Japan ◽  
Korean Archaeology

The application of chronometric dating studies in Korean archaeology has lagged behind similar research in China and Japan. The focus of this article is to provide an update on the accelerator mass spectrometry (AMS) radiocarbon dates derived from Korean Paleolithic and Early Neolithic sites. One of the major highlights from recent AMS 14C studies in Korea is that blade (and microblade) technologies may have diffused directly from Siberia, rather than through northern China as originally thought. In addition, a Neolithic wooden boat has been discovered in Korea that is as old as, if not older than, similar discoveries from eastern China. More detailed archaeological and chronometric studies in Korea in the coming years will certainly clarify many of the points mentioned here. In particular, through more detailed studies, we will be able to further evaluate the causal factors that provided the impetus for the Late Paleolithic-Neolithic transition in Korea.

scholarly journals Seoul National University Accelerator Mass Spectrometry (SNU-AMS) Radiocarbon Date List IV

Radiocarbon ◽  
2007 ◽  
Vol 49 (3) ◽  
pp. 1395-1402 ◽  
Author(s):  
M Youn ◽  
Y M Song ◽  
J Kang ◽  
J C Kim ◽  
M K Cheoun
Keyword(s):  
Mass Spectrometry ◽  
Sample Preparation ◽  
Accelerator Mass Spectrometry ◽  
Environmental Samples ◽  
Before Present ◽  
Geological Data ◽  
National University ◽  
Recent Developments ◽  
Seoul National University ◽  
Accelerator System

The accelerator mass spectrometry (AMS) facility at Seoul National University (SNU-AMS) was accepted in December 1998 and results reported first at the Vienna AMS conference in October 1999 and at the 17th Radiocarbon Conference in Israel, June 2000. At the Vienna conference, we reported our accelerator system and sample preparation systems (Kim et al. 2000). Recent developments of the AMS facility have been regularly reported at AMS conferences (Kim et al. 2001, 2004, 2007). Meanwhile, about 1000 unknown archaeological, geological, and environmental samples have been measured every year. In this report, the archaeological and geological data carried out in 2002 are presented in terms of years BP (before present, AD 1950), following the SNU-AMS date lists I and II published in Radiocarbon (Kim et al. 2006a,b).

scholarly journals Seoul National University Accelerator Mass Spectrometry (SNU-AMS) Radiocarbon Date List III

Radiocarbon ◽  
2007 ◽  
Vol 49 (3) ◽  
pp. 1387-1394 ◽  
Author(s):  
M Youn ◽  
Y M Song ◽  
J Kang ◽  
J C Kim ◽  
M K Cheoun
Keyword(s):  
Mass Spectrometry ◽  
Sample Preparation ◽  
Accelerator Mass Spectrometry ◽  
Environmental Samples ◽  
Before Present ◽  
Geological Data ◽  
National University ◽  
Recent Developments ◽  
Seoul National University ◽  
Accelerator System

The accelerator mass spectrometry (AMS) facility at Seoul National University (SNU-AMS) was accepted in December 1998 and results reported first at the Vienna AMS conference in October 1999 and at the 17th Radiocarbon Conference in Israel, June 2000. At the Vienna conference, we reported our accelerator system and sample preparation systems (Kim et al. 2000). Recent developments of the AMS facility have been regularly reported at AMS conferences (Kim et al. 2001, 2004, 2007). Meanwhile, about 1000 unknown archaeological, geological, and environmental samples have been measured every year. In this report, the archaeological and geological data carried out in 2001 are presented in terms of years BP (before present, AD 1950), following the SNU-AMS date lists I and II published in Radiocarbon (Kim et al. 2006a,b).

scholarly journals Seoul National University Accelerator Mass Spectrometry (SNU-AMS) Radiocarbon Date List I

Radiocarbon ◽  
2006 ◽  
Vol 48 (2) ◽  
pp. 259-266 ◽  
Author(s):  
J C Kim ◽  
M Y Youn ◽  
I C Kim ◽  
J H Park ◽  
Y M Song ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Accelerator Mass Spectrometry ◽  
Catalytic Reduction ◽  
Sample Pretreatment ◽  
Environmental Data ◽  
Geological Samples ◽  
National University ◽  
Mass Spectrometry Facility ◽  
Seoul National University ◽  
Accelerator System

The accelerator mass spectrometry facility at Seoul National University (SNU-AMS) began functioning in December 1998 and was first reported at the Vienna AMS conference in October 1999 and at the 17th International Radiocarbon Conference in Israel in June 2000. At the Vienna conference, we reported our accelerator system (Kim et al. 2000) and details of the basic sample preparation system (Lee et al. 2000), such as the combustion line to produce CO2; the catalytic reduction line for the graphitization of CO2; and the pretreatment procedures for wood, charcoal, and peat samples. The recent progress of the AMS facility (Kim et al. 2001) and the extension of the sample pretreatment system to iron and bone samples were reported at the 17th International Radiocarbon Conference (Cheoun et al. 2001). In the meantime, extensive testing of accuracy and reproducibility has been carried out, and ∼1000 unknown archaeological and geological samples have been measured every year. In this report, the archaeological, geological, and environmental data carried out in 1999 are presented in terms of yr BP.

scholarly journals Seoul National University Accelerator Mass Spectrometry (SNU-AMS) Radiocarbon Date List II

Radiocarbon ◽  
2006 ◽  
Vol 48 (2) ◽  
pp. 267-283 ◽  
Author(s):  
J C Kim ◽  
M Y Youn ◽  
I C Kim ◽  
J H Park ◽  
Y M Song ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Accelerator Mass Spectrometry ◽  
Catalytic Reduction ◽  
Sample Pretreatment ◽  
Environmental Data ◽  
Geological Samples ◽  
National University ◽  
Mass Spectrometry Facility ◽  
Seoul National University ◽  
Accelerator System

The accelerator mass spectrometry facility at Seoul National University (SNU-AMS) began functioning in December 1998 and was first reported at the Vienna AMS conference in October 1999 and at the 17th Radiocarbon Conference in Israel in June 2000. At the Vienna conference, we reported our accelerator system (Kim et al. 2000) and the basic sample preparation system (Lee et al. 2000), including the combustion line to produce CO2; the catalytic reduction line for the graphitization of CO2; and also pretreatment procedures for wood, charcoal, and peat samples. Recent progress of the AMS facility (Kim et al. 2001) and extension of the sample pretreatment system to iron and bone samples were reported at the 17th Radiocarbon Conference (Cheoun et al. 2001). In the meantime, extensive testing of accuracy and reproducibility has been carried out, and ∼1000 unknown archaeological and geological samples have been measured every year. A report of data carried out in 1999 is presented by Kim et al. (this issue). In this report, the archaeological, geological, and environmental data carried out in 2000 are presented in terms of yr BP.

scholarly journals The Chronology of the Ghassulian Chalcolithic Period in the Southern Levant: New14C Determinations from Teleilat Ghassul, Jordan

Radiocarbon ◽  
2001 ◽  
Vol 43 (3) ◽  
pp. 1217-1222 ◽  
Author(s):  
Stephen Bourke ◽  
Ewan Lawson ◽  
Jaimie Lovell ◽  
Quan Hua ◽  
Ugo Zoppi ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Accelerator Mass Spectrometry ◽  
Southern Levant ◽  
Late Neolithic ◽  
Chalcolithic Period ◽  
Type Site ◽  
Ams Dates

This article reports on ten new accelerator mass spectrometry (AMS) dates from the Chalcolithic period (fifth millennium BC) archaeological type-site of Teleilat Ghassul in Jordan. Early radiocarbon assays from the site proved difficult to integrate with current relative chronological formulations. The ten new AMS dates and follow-up enquiries connected with the early assays suggest that the original dates were up to 500 years too early. A necessary reformulation of regional relative chronologies now views the Ghassul sequence falling between Late Neolithic Jericho and the Beersheban Chalcolithic.

scholarly journals Predictors of cervical myelopathy and hydrocephalus in young children with achondroplasia

2021 ◽  
Vol 16 (1) ◽  
Author(s):  
Youngbo Shim ◽  
Jung Min Ko ◽  
Tae-Joon Cho ◽  
Seung‐Ki Kim ◽  
Ji Hoon Phi
Keyword(s):  
Magnetic Resonance Imaging ◽  
Young Children ◽  
Cervical Myelopathy ◽  
Treatment Method ◽  
Foramen Magnum ◽  
Resonance Imaging ◽  
Timely Manner ◽  
Frontal Horn ◽  
National University ◽  
Seoul National University

Abstract Background Cervical myelopathy and hydrocephalus occasionally occur in young children with achondroplasia. However, these conditions are not evaluated in a timely manner in many cases. The current study presents significant predictors for cervical myelopathy and hydrocephalus in young children with achondroplasia. Methods A retrospective analysis of 65 patients with achondroplasia who visited Seoul National University Children’s Hospital since 2012 was performed. The patients were divided into groups according to the presence of cervical myelopathy and hydrocephalus, and differences in foramen magnum parameters and ventricular parameters by magnetic resonance imaging between groups were analyzed. Predictors for cervical myelopathy and hydrocephalus were analyzed, and the cut-off points for significant ones were calculated. Results The group with cervical myelopathy showed foramen magnum parameters that indicated significantly lower cord thickness than in the group without cervical myelopathy, and the group with hydrocephalus showed significantly higher ventricular parameters and ‘Posterior indentation’ grade than the group without hydrocephalus. ‘Cord constriction ratio’ (OR 5199.90, p = 0.001) for cervical myelopathy and ‘Frontal horn width’ (OR 1.14, p = 0.001) and ‘Posterior indentation’ grade (grade 1: OR 9.25, p = 0.06; grade 2: OR 18.50, p = 0.01) for hydrocephalus were significant predictors. The cut-off points for cervical myelopathy were ‘Cord constriction ratio’ of 0.25 and ‘FM AP’ of 8 mm (AUC 0.821 and 0.862, respectively) and ‘Frontal horn width’ of 50 mm and ‘Posterior indentation’ grade of 0 (AUC 0.788 and 0.758, respectively) for hydrocephalus. Conclusion ‘Cord constriction ratio’ for cervical myelopathy and ‘Frontal horn width’ and ‘Posterior indentation’ grade for hydrocephalus were significant predictors and may be used as useful parameters for management. ‘Posterior indentation’ grade may also be used to determine the treatment method for hydrocephalus.

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