Results 31 to 40 of about 1,466,723 (303)

Thin-Film Tandem Organic Solar Cells With Improved Efficiency

open access: yesIEEE Access, 2020
Seeking high power conversion efficiency is always a striving pathway for many researchers to commercialize organic solar cells (OSCs). Thus, it is essential to achieve high conversion efficiency to make solar oriented devices as truly green energy ...
Waqas Farooq   +8 more
doaj   +1 more source

Recent origin of low trabecular bone density in modern humans [PDF]

open access: yes, 2014
Humans are unique, compared with our closest living relatives (chimpanzees) and early fossil hominins, in having an enlarged body size and lower limb joint surfaces in combination with a relatively gracile skeleton (i.e., lower bone mass for our body ...
Bernhard Zipfel   +11 more
core   +1 more source

Teknik Analisis Sisa Manusia

open access: yesBerkala Arkeologi, 2000
Hampir pasti bahwa temuan sisa manusia dalam konteks data arkeologi di Indonesia hanya akan berkisar pada dua spesies, yaitu Homo erectus dan Homo sapiens.
Harry Widianto
doaj   +3 more sources

Poéticas do desejo e dos prazeres LGBTQ na Poesia gay brasileira

open access: yesEstudos de Literatura Brasileira Contemporânea, 2020
Una antología es un compendio de textos, de uno o varios autores, elegidos por un organizador con la finalidad de poner en evidencia una estética, un período o una temática. Antologías, por lo tanto, dicen mucho de las políticas editoriales y sociales de
Claudicélio Rodrigues da Silva
doaj   +1 more source

DFT calculations on conjugated organic molecules based on thienothiophene for electronic applications [PDF]

open access: yesE3S Web of Conferences, 2022
We report theoretical studies on the optoelectronic structural properties of five thienothiophene (T) conjugated π conjugates. The geometries, the prediction of the optoelectronic structural properties of the five compounds are studied by calculations of
Elaati Allah Ismail   +3 more
doaj   +1 more source

Stabilization of a Two-Coordinate [GeCl]+ Cation by Simultaneous σ and π Donation from a Monodentate Carbodiphosphorane [PDF]

open access: yes, 2013
Give me four: The synthesis, structure, and reactivity of [GeCl]+ and [SnCl]+ cations bearing a carbodiphosphorane as ancillary ligand are presented. In the Ge compound, simultaneous σ and π donation from the carbodiphosphorane to Ge is observed (see ...
Alcarazo, M.   +3 more
core   +2 more sources

From Homo Economicus to Homo Sapiens [PDF]

open access: yesJournal of Economic Perspectives, 2000
In responding to a request for predictions about the future of economics, I predict that Homo Economicus will evolve into Homo Sapiens, or, more simply put, economics will become more related to human behavior. My specific predictions are that Homo Economicus will start to lose IQ, will become a slower learner, will start interacting with other ...
openaire   +2 more sources

Sexual Dimorphism in Homo erectus Inferred from 1.5 Ma Footprints Near Ileret, Kenya [PDF]

open access: yes, 2019
Sexual dimorphism can be one of the most important indicators of social behavior in fossil species, but the effects of time averaging, geographic variation, and differential preservation can complicate attempts to determine this measure from preserved ...
Hatala, Kevin G.   +2 more
core   +2 more sources

Revisiting the age of the Florisbad hominin material

open access: yesHomo, 2023
In 1996, Grün and coworkers provided an ESR age determination for a hominin molar from Florisbad, South Africa, at 259 ± 35 ka. The most anatomically informative hominin specimen from Florisbad is a fragmentary craniofacial specimen, attributed by many ...
Lee R. Berger, John Hawks
doaj   +1 more source

Greening a lost world: Paleoartistic investigations of the early Pleistocene vegetation landscape in the first Europeans' homeland

open access: yesQuaternary Science Advances
The scarcity of pictorial reconstructions focusing on Quaternary flora and vegetation prompts a reevaluation of traditional zoocentrism in future paleoartistic research.
José Carrión   +7 more
doaj   +1 more source

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