Is there an early Far Western Lapita province? Sample size effects and new evidence from Eloaua Island

AbstractNation-wide data in Japan on births and prenatal deaths of 16 sets of quintuplets during 1974-1985 were analysed. Among the 16 sets, 3 sets were liveborn, 8 were stillborn, and 5 were mixed, with a stillbirth rate of 0.64 (51/80). Effects of sex, maternal age and birth order on the stillbirth rate were not considered because of the small sample size. Effects of gestational age and birthweight on stillbirth rate were also examined. The mean weight of the 40 quintuplet individuals was 1,048 g.

Download Full-text

On the Size Effects in Micro/Meso Upsetting of Brass H62 at Elevated Temperatures

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.621.158 ◽

2014 ◽

Vol 621 ◽

pp. 158-164

Author(s):

Hao Yan Wang ◽

Zhe He Yao ◽

De Qing Mei

Keyword(s):

Flow Stress ◽

Sample Size ◽

Size Effects ◽

Metal Forming ◽

Room Temperature ◽

Production Efficiency ◽

Elevated Temperatures ◽

Processing Temperature ◽

High Production ◽

Scaling Down

Micro/meso forming, as an emerging manufacturing process for miniature metallic workpieces, has attracted great attention since the 1990s due to its high production efficiency, low material waste and high precision. Due to the so-called size effects in the scaling down, many traditional theories in metal forming cannot be simply applied to the micro/meso forming. In this study, the micro/meso upsetting experiments of Brass H62 were conducted at various temperatures. The stress−strain curves in the experiments were measured and compared. The effects of the temperature and the sample size on the flow stress were discussed. It is found that the flow stress of the material decreased with the decrease of the sample size at room temperature. However, the flow stress of the material may increase with the decrease of the sample size at elevated temperatures. The results indicate that the size effects in the micro/meso forming are significantly affected by the processing temperature.

Download Full-text

Error estimation due to sample size effects of in situ surface impedance measurements.

The Journal of the Acoustical Society of America ◽

10.1121/1.3385186 ◽

2010 ◽

Vol 127 (3) ◽

pp. 2001-2001

Author(s):

Eric Brandao ◽

Erico Fulco ◽

Arcanjo Lenzi ◽

Emiel Tijs

Keyword(s):

Sample Size ◽

Error Estimation ◽

Size Effects ◽

Surface Impedance ◽

Impedance Measurements

Download Full-text

Sample-Size Effects in the Magnetoresistance of Graphite

Physical Review Letters ◽

10.1103/physrevlett.99.216601 ◽

2007 ◽

Vol 99 (21) ◽

Cited By ~ 32

Author(s):

J. C. González ◽

M. Muñoz ◽

N. García ◽

J. Barzola-Quiquia ◽

D. Spoddig ◽

...

Keyword(s):

Sample Size ◽

Size Effects

Download Full-text

The influence of memory, sample size effects, and filter paper material on online laser-based plant and soil water isotope measurements

Rapid Communications in Mass Spectrometry ◽

10.1002/rcm.7824 ◽

2017 ◽

Vol 31 (6) ◽

pp. 509-522 ◽

Cited By ~ 6

Author(s):

Jiangpeng Cui ◽

Lide Tian ◽

Cynthia Gerlein-Safdi ◽

Dongmei Qu

Keyword(s):

Sample Size ◽

Soil Water ◽

Filter Paper ◽

Size Effects ◽

Isotope Measurements ◽

Water Isotope

Download Full-text

An Anthropological Perspective on the Sample Size-Richness Relation: A Response to Leonard

American Antiquity ◽

10.2307/281889 ◽

1997 ◽

Vol 62 (4) ◽

pp. 717-718 ◽

Cited By ~ 3

Author(s):

Stephen Plog ◽

Michelle Hegmon

Keyword(s):

Sample Size ◽

Size Effects ◽

Research Process ◽

Full Agreement ◽

Anthropological Perspective ◽

Behavioral Variation ◽

Important Concern

We are in full agreement with Leonard, and many others, that the sample size-richness relation is an important concern for archaeologists, and we appreciate his evenhanded discussion of our paper. However, we disagree with Leonard regarding the point in the research process when variable prehistoric behavior can be used to explain differences in richness. Leonard and others argue that we must always begin studies of richness by controlling any observed relation to sample size; we can only consider prehistoric behavior as an explanation of richness after we account for sample size effects. In contrast, we suggest that following his recommendations will obscure aspects of behavioral variation that are important to understanding prehistoric societies. Considerations of prehistoric behavior must therefore be central in studies of richness.

Download Full-text