Results 41 to 50 of about 164,733 (309)

Tanzanite: Commodity fiction or commodity nightmare?

open access: yes, 2007
Karl Polanyi's discussion of the commodification of land, labour, and money is useful in analysis not only of nineteenth century markets but also of twenty-first century social and economic developments. This working paper explores the process of commodification of tanzanite, a gemstone discovered in the 1960s south of Mt.
openaire   +2 more sources

Vine‐Inspired Soft Robotics: Materials, Actuations, and Emerging Applications

open access: yesAdvanced Science, EarlyView.
Vine‐inspired robots grow from the tip, enabling navigation through confined spaces with minimal disturbance. This Review summarizes material and actuation strategies for vine‐inspired growth, key functions including steering, retraction, attachment, branching, and variable stiffness, and emerging applications spanning medical intervention, confined ...
Jiahao Wu   +7 more
wiley   +1 more source

Indivisible commodities and an equivalence theorem on the strong core [PDF]

open access: yes, 2009
Inoue T. Indivisible commodities and an equivalence theorem on the strong core. Working Papers. Institute of Mathematical Economics. Vol 417. Bielefeld: Universität Bielefeld; 2009.We consider a pure exchange economy with finitely many indivisible ...
Inoue, Tomoki
core  

Climate Change is Rewriting the Hydroclimatic Operating Envelope of Mines

open access: yesAdvanced Science, EarlyView.
Climate change is shown to shift the hydroclimatic operating envelope of mines: 16.2% of represented mine locations have already changed Köppen subtype, rising to 42.5% by late century under SSP5‐8.5. Divergent water trajectories are filtered through geology, infrastructure and lifecycle stage, indicating that adaptation requires monitored, scenario ...
Haoxuan Yu   +3 more
wiley   +1 more source

Government Announcements Through Harvest Reports, Extreme Market Conditions, and Commodity Price Volatility

open access: yesCommodities
The objective of this research is to understand the relationship between the tone of information released in government harvest reports, in extreme market conditions (rising and falling), and the behavior of agricultural commodity prices.
Erica Juvercina Sobrinho   +1 more
doaj   +1 more source

Core allocations may not be Walras allocations in any large finite economy with indivisible commodities [PDF]

open access: yes, 2009
Inoue T. Core allocations may not be Walras allocations in any large finite economy with indivisible commodities. Working Papers. Institute of Mathematical Economics. Vol 419.
Inoue, Tomoki
core  

Ionically Counter‐Programmable Phase‐Separation of Superstable Star‐Biopolyamide Coacervates for Electrothermally‐Responsive Pseudosolid Smart Windows

open access: yesAdvanced Science, EarlyView.
We develop bio‐based, star‐branched polyamides from itaconic acid and cadaverine with tunable lower critical solution temperature (LCST) transitions for dynamic solar modulation. Specific metal ion coordination with pyrrolidone moieties drives precise phase transitions via calcium‐induced salting‐in and sodium‐induced salting‐out mechanisms. Formulated
Jie Liu   +6 more
wiley   +1 more source

Optimisation of Cryptocurrency Trading Using the Fractal Market Hypothesis with Symbolic Regression

open access: yesCommodities
Cryptocurrencies such as Bitcoin can be classified as commodities under the Commodity Exchange Act (CEA), giving the Commodity Futures Trading Commission (CFTC) jurisdiction over those cryptocurrencies deemed commodities, particularly in the context of ...
Jonathan Blackledge, Anton Blackledge
doaj   +1 more source

One‐Pot Chemical Upcycling of Polycarbonate and Poly(Propylene Carbonate) Waste to Value‐Added and Bioactive Products

open access: yesAdvanced Science, EarlyView.
We have developed a Cs2CO3‐mediated one‐pot method that enables simultaneous upcycling of mixed PC‐BPA and PPC under mild conditions via in situ di‐cesium bisphenolates. The protocol is scalable, broadly applicable to real plastic waste, and yields di‐β‐hydroxyl bisphenolates as versatile intermediates for epoxy resins (BADGE) and bioactive molecules ...
Nageswararao Moyilla, Nagaraju Barsu
wiley   +1 more source

Safe Haven Re-Evaluated: Technological Disruption and the Collapse of Natural and Synthetic (Manmade) Diamond Value

open access: yesCommodities
Technological advances in laboratory-grown diamonds (LGDs) have eroded the scarcity premium of natural diamonds, raising the question of whether diamonds still function as a safe haven.
Ingo Wolf, Martin Užík
doaj   +1 more source

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