Results 191 to 200 of about 491,313 (385)

Was the Inca Economy Based on “Protomoney”? Or, Why Accounting Systems Should Not Be Conflated With Concepts of Exchange Value

open access: yesEconomic Anthropology, EarlyView.
ABSTRACT The khipu knotted string records in the ancient Andes were accounting systems, but they did not indicate any concepts of commensurability or exchange value. They were not incipient money; instead, monetized commerce appears to have predated the economic organization of the Inca society. The article begins by tracing the emergence of coinage in
Alf Hornborg
wiley   +1 more source

The Unknown Legacy of the 13th Amendment

open access: yes, 2016
On January 31, 1865, Congress passed the 13th Amendment, declaring slavery illegal in the United States. Or so it seemed. The second line of the Amendment, and the most oft unknown, states that slavery can still be used as a form of punishment for crimes,
Jones, Danielle E.
core  

Compact Manipulator With Flexible Parallel Mechanisms and Variable Stiffness for Keyhole Procedures

open access: yesSmartBot, EarlyView.
This paper presents a compact 7‐DOF flexible parallel manipulator with a 4.5 mm outer diameter and a 1.8 mm central instrument channel for keyhole procedures. Kinematic and stiffness models are established, and workspace dexterity is analyzed. Experimental validation shows 0.49 mm average teleoperation accuracy, confirming excellent performance in ...
Changsheng Li   +6 more
wiley   +1 more source

The Jamestown/Xiaogang Survival Game: A Class Experiment

open access: yesSouthern Economic Journal, EarlyView.
ABSTRACT One of the most important insights for any economics class is the power of private incentives and competition to work hard when the fruits of one's effort are not diluted by incomplete property rights. The paper reports results of a classroom experiment that implements a transition from a “common field” with shared harvests to a division into ...
Lee Coppock   +3 more
wiley   +1 more source

The Legacy of Chattel Slavery and Its Association with Prostate Cancer Incidences in the Southeastern United States. [PDF]

open access: yesCancer Epidemiol Biomarkers Prev
Bharadwaj MC   +7 more
europepmc   +1 more source

Freedom of Scientific Inquiry and Democracy. A Systems‐Theoretical Approach

open access: yesSystems Research and Behavioral Science, EarlyView.
ABSTRACT The article examines the relationship between democracy and one of its inherent features: freedom of scientific inquiry—a multi‐layered concept closely intertwined with the broader notion of academic freedom—both of which are increasingly under threat worldwide. The paper advocates for the use of Luhmann's theoretical framework to analyse this
Krešimir Žažar, Steffen Roth
wiley   +1 more source

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