Ecological perspectives on technological diversity at Kanjera South

2021 ◽  
Vol 158 ◽  
pp. 103029
Author(s):  
Jonathan S. Reeves ◽  
David R. Braun ◽  
Emma M. Finestone ◽  
Thomas W. Plummer
Keyword(s):  
Technological Diversity ◽  
Kanjera South

Technological diversity and coherence in Europe : an analytical overview

1992 ◽  
Vol 59 (1) ◽  
pp. 9-26 ◽  
Author(s):  
Patrick Cohendet ◽  
Patrick Llerena ◽  
Arndt Sorge
Keyword(s):  
Technological Diversity

Industry Competition and Searching for the Technological Diversity

2013 ◽  
Author(s):  
Kwangwook Gang ◽  
Byungchul Choi ◽  
Seungbeom Kim
Keyword(s):  
Technological Diversity ◽  
Industry Competition

scholarly journals Geochronology and physical context of Oldowan site formation at Kanjera South, Kenya

2018 ◽  
Vol 156 (07) ◽  
pp. 1190-1200 ◽  
Author(s):  
P. W. DITCHFIELD ◽  
E. WHITFIELD ◽  
T. VINCENT ◽  
T. PLUMMER ◽  
D. BRAUN ◽  
...  
Keyword(s):  
Depositional Environment ◽  
Fine Fraction ◽  
Lacustrine Sediments ◽  
Site Formation ◽  
Lake Basin ◽  
Limited Evidence ◽  
Associated Fauna ◽  
Physical Context ◽  
Granulometric Analysis ◽  
Kanjera South

AbstractOldowan sites in primary geological context are rare in the archaeological record. Here we describe the depositional environment of Oldowan occurrences at Kanjera South, Kenya, based on field descriptions and granulometric analysis. Excavations have recovered a large Oldowan artefact sample as well as the oldest substantial sample of archaeological fauna. The deposits at Kanjera South consist of 30 m of fluvial, colluvial and lacustrine sediments. Magneto- and biostratigraphy indicate the Kanjera South Member of the Kanjera Formation was deposited during 2.3–1.92 Ma, with 2.0 Ma being a likely age for the archaeological occurrences. Oldowan artefacts and associated fauna were deposited in the colluvial and alluvial silts and sands of beds KS1–3, in the margins of a lake basin. Field descriptions and granulometric analysis of the sediment fine fraction indicate that sediments from within the main archaeological horizon were emplaced as a combination of tractional and hyperconcentrated flows with limited evidence of debris-flow deposition. This style of deposition is unlikely to significantly erode or disturb the underlying surface, and therefore promotes preservation of surface archaeological accumulations. Hominins were repeatedly attracted to the site locale, and rapid sedimentation, minimal bone weathering and an absence of bone or artefact rounding further indicate that fossils and artefacts were quickly buried.

The Environmental Context of Oldowan Hominin Activities at Kanjera South, Kenya

2009 ◽  
pp. 149-160 ◽  
Author(s):  
Thomas W. Plummer ◽  
Laura C. Bishop ◽  
Peter W. Ditchfield ◽  
Joseph V. Ferraro ◽  
John D. Kingston ◽  
...  
Keyword(s):  
Environmental Context ◽  
Kanjera South

scholarly journals Measuring the effectiveness of online problem solving for improving academic performance in a probability course

2022 ◽  
Author(s):  
José Antonio González ◽  
Mónica Giuliano ◽  
Silvia N. Pérez
Keyword(s):  
Problem Solving ◽  
Confidence Interval ◽  
Student Performance ◽  
Online Homework ◽  
Methodological Issues ◽  
Engineering Programs ◽  
Technological Diversity ◽  
The Subject ◽  
The Difference ◽  
Written Test

AbstractResearch on impact in student achievement of online homework systems compared to traditional methods is ambivalent. Methodological issues in the study design, besides of technological diversity, can account for this uncertainty. Hypothesis This study aims to estimate the effect size of homework practice with exercises automatically provided by the ‘e-status’ platform, in students from five Engineering programs. Instead of comparing students using the platform with others not using it, we distributed the subject topics into two blocks, and created nine probability problems for each block. After that, the students were randomly assigned to one block and could solve the related exercises through e-status. Teachers and evaluators were masked to the assignation. Five weeks after the assignment, all students answered a written test with questions regarding all topics. The study outcome was the difference between both blocks’ scores obtained from the test. The two groups comprised 163 and 166 students. Of these, 103 and 107 respectively attended the test, while the remainder were imputed with 0. Those assigned to the first block obtained an average outcome of −1.85, while the average in the second block was −3.29 (95% confidence interval of difference, −2.46 to −0.43). During the period in which they had access to the platform before the test, the average total time spent solving problems was less than three hours. Our findings provide evidence that a small amount of active online work can positively impact on student performance.

scholarly journals Generated PSM Web Model for E-learning Platform Respecting n-tiers Architecture

2017 ◽  
Vol 12 (10) ◽  
pp. 212 ◽  
Author(s):  
Aziz Srai ◽  
Fatima Guerouate ◽  
Naoual Berbiche ◽  
Hilal HilalDrissi
Keyword(s):  
Mobile Device ◽  
Professional Training ◽  
Role Playing ◽  
Transformation Language ◽  
Technological Diversity ◽  
Learning Platform ◽  
E Learning ◽  
Learning Platforms ◽  
Role Playing Game ◽  
View Transformation

E-learning, or learning via a computer or mobile device, is growing. It can take many forms, such as an annotated PowerPoint presentation, a tutorial, or an interactive role-playing game .The possibilities are endless. Today, 80% of companies and communities have done a number of interesting and effective e-learning solutions, and 30% of all professional training are e-learning courses. The development of these platforms is based mainly on different technologies. This technological diversity can make comparing or managing E-learning platforms difficult, and the choice of a given platform will be also complex. Therefore, to address this problem, this paper proposes a solution to generate a PSM model based on n-tier architecture from a PIM model. The language used is the QVT (Query View Transformation) transformation language.

scholarly journals The Technological Diversity of Lithic Industries in Eastern South America during the Late Pleistocene-Holocene Transition

2020 ◽  
Author(s):  
João Carlos Moreno De Sousa
Keyword(s):  
South America ◽  
Late Pleistocene ◽  
Northeastern Brazil ◽  
Southern Brazil ◽  
Cultural Patterns ◽  
Projectile Points ◽  
Technological Diversity ◽  
Lithic Assemblages ◽  
Adjacent Part ◽  
Archaeological Cultures

Brazilian archaeological literature has insisted for decades upon associating hunter-gatherer sites dated to the Pleistocene–Holocene transition either to the Itaparica tradition, if located in central or northeastern Brazil, or to the Umbu tradition and Humaitá tradition, if located in southern Brazil, Uruguay, or any other adjacent part of Paraguay and Argentina. These associations have been based almost entirely on the presence or absence of lesmas and “projectile points,” regardless of their morphological and technological features. In the Uruguayan archaeological literature, three other cultures are recognised: Fell industry, Catalanense industry, and Tigre tradition, all in the Uruguayan region. However, the last 10 years of systematic studies on the lithic assemblages from these sites have shown that Paleoindian societies from Eastern South America are more culturally diverse than expected and that previously defined archaeological cultures present several issues in their definition, suggesting that many of these “traditions” are not valid and should no longer be used. Instead, new lithic industries and archaeological cultures should be defined only when cultural patterns are observable through systematic analyses.

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