• Title/Summary/Keyword: Historical studies of science

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Connecting the Inner and Outer Product of Vectors Based on the History of Mathematics (수학사에 기초한 벡터의 내적과 외적의 연결)

  • Oh, Taek-Keun
    • Journal of Educational Research in Mathematics
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    • v.25 no.2
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    • pp.177-188
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    • 2015
  • In this paper, I investigated the historical development process for the product of two vectors in the plane and space, and draw implications for educational guidance to internal and external product of vectors based on it. The results of the historical analysis show that efforts to define the product of the two line segments having different direction in the plane justified the rules of complex algebraic calculations with its length of the product of their lengths and its direction of the sum of their directions. Also, the efforts to define the product of the two line segments having different direction in three dimensional space led to the introduction of quaternion. In addition, It is founded that the inner product and outer product of vectors was derived from the real part and vector part of multiplication of two quaternions. Based on these results, I claimed that we should review the current deployment method of making inner product and outer product as multiplications that are not related to each other, and suggested one approach for connecting the inner and outer product.

Aboriginal Community Archives in Australia and Current Meaning of "Parallel Provenance" (호주 원주민 공동체 아카이브와 '평행출처주의'의 현재적 의미)

  • Lee, Kyong Rae
    • The Korean Journal of Archival Studies
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    • no.40
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    • pp.29-60
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    • 2014
  • The purpose of this study is to trace the formation process of "parallel provenance" concept in the context of Australia's aboriginal community archives development and draw its implications for contemporary rebuilding of domestic "past affairs-related committee archives". Focused on historical development of aboriginal community archives in Australia, this writing divides its development into three periods: colonial archives, post-colonial archives, and contemporary archives and investigates each period's distinct features in managing and building of aboriginal community archives. First of all, for colonial archives, it pays attention to Australia's archival tradition, which focused on current record-keeping and then development of multiple provenance resulted from this tradition. Second, for post-colonial archives, it examines the appearance of aboriginal people as the subject of documentation category and name indexing on them. Finally, for contemporary archives, it analyzes current activities of Australia's academic world of archival science for overcoming "the otherness" of aboriginal people through conceptualization of "parallel provenance". Conclusively, through current meaning of parallel provenance, this study draws implications for democratic contemporary rebuilding of domestic past affairs-related committee archives, in which historical victims become the subject of archives.

Genetic Characteristics of 207 Microsatellite Markers in the Korean Population and in other Asian Populations

  • Choi, Su-Jin;Song, Hye-Kyung;Jeong, Jae-Hwan;Jeon, In-Ho;Yoon, Ho-Sung;Chung, Ki Wha;Won, Yong-Jin;Choi, Je-Yong;Kim, Un-Kyung
    • Molecules and Cells
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    • v.25 no.2
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    • pp.301-304
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    • 2008
  • Microsatellites, short tandem repeats, are useful markers for genetic analysis because of their high frequency of occurrence over the genome, high information content due to variable repeat lengths, and ease of typing. To establish a panel of microsatellite markers useful for genetic studies of the Korean population, the allele frequencies and heterozygosities of 207 microsatellite markers in 119 unrelated Korean, Indian and Pakistani individuals were compared. The average heterozygosity of the Korean population was 0.71, similar to that of the Indian and Pakistani populations. More than 80% of the markers showed heterozygosity of over 0.6 and were valuable as genetic markers for genome-wide screening for disease susceptibility loci in these populations. To identify the allelic distributions of the multilocus genetic data from these microsatellite markers, the population structures were assessed by clustering. These markers supported, with the most probability, three clustering groups corresponding to the three geographical populations. When we assumed only two hypothetical clusters (K), the Korean population was separate from the others, suggesting a relatively deep divergence of the Korean population. The present 207 microsatellite markers appear to reflect the historical and geographical origins of the different populations as well as displaying a similar degree of variation to that seen in previously published genetic data. Thus, these markers will be useful as a reference for human genetic studies on Asians.

Parabiosis and Aging Researches (개체병렬결합 그리고 노화 연구)

  • Chung, Kyung Tae
    • Journal of Life Science
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    • v.27 no.12
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    • pp.1515-1522
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    • 2017
  • Most people have a desire to live longer. According to ancient Chinese and Korean mythology, Dongfang Shuo (Dongbang Sahk) lived for 18,000 years. According to a WHO report, the average longevity of humans has extended from 50-odd years in the 1960s to 75-85 years in 2016. Parabiosis, the joining to circulatory systems of two animals, was described as early as the 1860s. It provides a powerful experimental model to investigate the effects of one animal on its partner animal in vivo. Research on reverse aging is an immensely popular in parabiosis studies. In this review, the origin of the parabiosis model and important historical findings based on parabiosis models are presented. Surprising and debated discoveries in aging research are also introduced. Using heterochronic parabiosis of connecting circulatory systems of a young mouse and old mouse, various groups claim to have identified a reverse aging factor, growth differentiation factor 11 (GDF11), which was significantly reduced in blood of old mice. Although the potential existence of any one factor or factors that could reverse aging remains to be confirmed, studies have shown that the parabiosis model is powerful enough to detect reverse aging factors.

Science and Art: Some Preliminary Studies in their Convergence and Interfaces (과학과 예술: 그 수렴과 접점을 위한 시론)

  • Hong Sung-Ook
    • Journal of Science and Technology Studies
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    • v.5 no.1 s.9
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    • pp.1-30
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    • 2005
  • In recent times, artists rely increasingly on science and technology, whereas scientists frequently use such an aesthetic tenn like 'eauty.' This shows that the gap between the 'two cultures' are narrowing down due to the necessity of both sides. The historical interaction between science and art has been extensively discussed by the historians of art and those of science. As the complexities of scientific and artistic practices were uncovered, similarities between them were also revealed. The goals of this paper, which explores the relationship and interactions between science and art, are the following three. The first is to bridge the gap between the two cultures (i.e., science and art) by disclosing the mutual influences between them. Second, drawing on recent works on the nature of scientific and artistic creativity, this paper aims to show some similarities and even common factors between scientific and artistic creativity. Finally, by highlighting similarities and common elements between scientific and artistic creativity, this paper will emphasize the role of imagination, insight, emotion and visualization not only in art but also in science.

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Studies of Taxonomic Origins of Atractylodis Rhizoma Alba and Atractylodis Rhizoma (백출과 창출의 기원에 대한 식물분류학적 연구)

  • Lee, Je-Hyun;Kim, Yun-Kyung;Hong, Seon-Pyo;Kim, Chung-Sook
    • Korean Journal of Oriental Medicine
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    • v.8 no.1
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    • pp.55-63
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    • 2002
  • The plant origines of Atractylodis Rhizoma Alba and Atractylodis Rhizoma are genus Atractylodes*Compositae). Their origines in pharmacopoeia are slightly different among Korea, Japan, North Korea and China. The species of Atractylodis Rhizoma Alba are Atrctylodes japonica $K_{OIDZ}$. A. ovata $T_{HUNB}$.. Atractylodis Rhizoma are A. lancea DC., A. chinensis DC. and A. koreana $K_{ITM}$. But the texonomic genealogy of Atractylodis Rhizoma Alba is different from that of Atractylodis Rhizoma. The herbal origines of Atractylodis Rhizoma Alba and Atractylodis Rhizoma were not different at the early days. Since Tao-Hong-Jing(陶弘景) distinguished between Atractylodis Rhizoma Alba and Atractylodis Rhizoma at the very beginning, theri medicinal usages are different, Atractylodis Rhizoma have been used to remove pathogenic dampness in the digestive organs and Atractylodis Rhizoma Alba have been used to invigorate the digestive system and replenish qi. In additions, the figures and historical records of herbal appearance are different between Atractylodis Rhizoma Alba and Atractylodis Rhizoma. The diagnostics of them are in accord with the texonomic genealogies.

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Universities in India's National System of Innovation: An Overview

  • Krishna, Venni V.
    • Asian Journal of Innovation and Policy
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    • v.1 no.1
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    • pp.1-30
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    • 2012
  • The status and functioning of Indian universities is explored in the Indian context from an NSI perspective. Whilst NSI is the main guiding post, the very social and economic context of Indian situation reflect the theoretical underpinning of this paper. The First part serves as a background to knowledge institutions and university sector in India. Basically, it identifies the main actors and agencies of India's NSI, namely, public research system comprising national laboratories, main science and technology agencies and councils and the university system. Given the focus of the paper on Indian universities in a macro historical perspective, the Second part is devoted to trace the growth and structure of university sector in terms of three phases, namely, 1940s to 1980; 1980 to 1990; and the era of liberalization after 1991. The Third part of the paper is devoted to knowledge production and knowledge diffusion. There are some important findings coming out of the quantitative data. It is argued that Indian production of doctorates is falling behind countries like China. Further, Indian universities are yet to achieve Humboltian goal. Finally, the paper has a concluding section which concerns with the current and future challenges facing Indian universities and their role in India's NIS.

Verification of the Wind-driven Transport in the North Pacific Subtropical Gyre using Gridded Wind-Stress Products Constructed by Scatterometer Data

  • Aoki, Kunihiro;Kutsuwada, Kunio
    • Proceedings of the KSRS Conference
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    • 2007.10a
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    • pp.418-421
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    • 2007
  • Using gridded wind-stress products constructed by satellite scatterometers (ERS-1, 2 and QSCAT) data and those by numerical weather prediction(NWP) model(NCEP-reanalysis), we estimate wind-driven transports of the North Pacific subtropical gyre, and compare them in the central portion of the gyre (around 300 N) with geostrophic transports calculated from historical hydrographic data (World Ocean Database 2005). Even if there are some discrepancies between the wind-driven transports by the QSCAT and NCEP products, they are both in good agreement with the geostrophic transports within reasonable errors, except for the regional difference in the eastern part of the zone. The difference in the eastern part is characterized by an anticyclonic deviation of the geostrophic transport resulting from an anti-cyclonic anomalous flow in the surface layer, suggesting that it is related to the Eastern Gyral produced by the thermohaline process associated with the formation of the Eastern Subtropical Mode Water. We also examine the consistency of the Sverdrup transports estimated from these products by comparing them with the transports of the western boundary current, namely the Kuroshio regions, in previous studies. The net southward transport, based on the sum of the Sverdrup transports by QSCAT and NCEP products and the thermohaline transport, agrees well with the net northward transport of the western boundary current, namely the Kuroshio transport. From these results, it is concluded that the Sverdrup balance can hold in the North Pacific subtropical gyre.

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Estimation of Interaction Effects among Nucleotide Sequence Variants in Animal Genomes

  • Lee, Chaeyoung;Kim, Younyoung
    • Asian-Australasian Journal of Animal Sciences
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    • v.22 no.1
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    • pp.124-130
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    • 2009
  • Estimating genetic interaction effects in animal genomics would be one of the most challenging studies because the phenotypic variation for economically important traits might be largely explained by interaction effects among multiple nucleotide sequence variants under various environmental exposures. Genetic improvement of economic animals would be expected by understanding multi-locus genetic interaction effects associated with economic traits. Most analyses in animal breeding and genetics, however, have excluded the possibility of genetic interaction effects in their analytical models. This review discusses a historical estimation of the genetic interaction and difficulties in analyzing the interaction effects. Furthermore, two recently developed methods for assessing genetic interactions are introduced to animal genomics. One is the restricted partition method, as a nonparametric grouping-based approach, that iteratively utilizes grouping of genotypes with the smallest difference into a new group, and the other is the Bayesian method that draws inferences about the genetic interaction effects based on their marginal posterior distributions and attains the marginalization of the joint posterior distribution through Gibbs sampling as a Markov chain Monte Carlo. Further developing appropriate and efficient methods for assessing genetic interactions would be urgent to achieve accurate understanding of genetic architecture for complex traits of economic animals.

Rational Leadership for the Middle East: A Multiple Competencies Model

  • ALDULAIMI, Saeed Hameed
    • The Journal of Asian Finance, Economics and Business
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    • v.8 no.4
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    • pp.687-697
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    • 2021
  • This study aims to address the prevailing skepticism that conventional leadership models are not effective in the Middle East. With the same logic, selecting leaders is a confusing task in the Middle East due to the haphazardness surrounding this task and the lack of clarity of appropriate selection criteria. This study employs samples of leadership theories and frameworks that were scrutinized to classify specific leadership dimensions. The triangular model stemmed from the previous studies that addressed Leadership in general and the Leadership model for the Middle East. With the use of the literature review methodologies and historical analysis, the leadership model's description will be demonstrated. The results revealed that there are various dimensions of Leadership, especially concerning the Middle East's organizational environment. The findings of this study suggested a new model which assists in clarifying the issue by setting a group of 10 personality traits with eight behavioral skills and social status. Implications of this study enable making Leadership easier in practice. Furthermore, this will enable recognition of Leadership according to specific criteria, which will help make greater equality and empowerment at all levels of the system. This research localizes Leadership and paves the way to automate leaders' selection process with a guarantee of fairness among candidates.