Results 11 to 20 of about 17,521,233 (323)

Woodworking in the Bronze Age Southern Trans-Urals (the case study of the fortified settlement of Kamenny Ambar) [PDF]

Вестник археологии, антропологии и этнографии, 2020
The paper presents the description and analysis of the collection of wood (formwork elements and objects) from wells of the Bronze Age fortified settlement of Kamenny Ambar (Chelyabinsk Oblast).
Koryakova L.N. , Molchanov I.V.
doaj   +1 more source

Auger Recombination in Semiconductor Quantum Wells [PDF]

, 1998
The principal mechanisms of Auger recombination of nonequilibrium carriers in semiconductor heterostructures with quantum wells are investigated. It is shown for the first time that there exist three fundamentally different Auger recombination mechanisms
A. Haug, A. Haug, A. Haug, A. R. Beattie, Anatoli S. Polkovnikov, B. A. Foreman, B. K. Ridley, B. L. Gel’mont, E. O. Kane, E. P. O’Reilly, E. P. O’Reilly, G. G. Zegrya, G. G. Zegrya, G. G. Zegrya, G. G. Zegrya, G. L. Bir, G. P. Agrawal, Georgy G. Zegrya, J. Wang, L. D. Landau, L. D. Landau, M. Aidaraliev, M. G. Burt, M. I. Dyakonov, M. Sweeny, M. Takeshima, M. Takeshima, N. K. Dutta, P. C. Sercel, R. A. Suris, R. I. Taylor, R. I. Taylor, S. Ideshita, W. W. Lui   +33 more
core   +2 more sources

Scaling law for excitons in 2D perovskite quantum wells

Nature Communications, 2018
Ruddlesden–Popper halide perovskites are 2D solution-processed quantum wells with a general formula A2A’n-1MnX3n+1, where optoelectronic properties can be tuned by varying the perovskite layer thickness (n-value), and have recently emerged as efficient ...
J. Blancon, A. Stier, H. Tsai, H. Tsai, W. Nie, C. Stoumpos, Boubacar Traoré, L. Pédesseau, M. Képénekian, F. Katsutani, G. Noe, J. Kono, S. Tretiak, S. Crooker, C. Katan, M. Kanatzidis, J. Crochet, J. Even, A. Mohite, A. Mohite   +19 more
semanticscholar   +1 more source

Prostate cancer and sarcoma: Challenges of synchronous malignancies

Radiology Case Reports, 2020
Synchronous primary malignancies are a rare finding which can be difficult to diagnose. We present the case of a 57-year-old patient with a high prostate specific antigen who was found to have prostate cancer on subsequent magnetic resonance imaging.
Luqman Wali, MBBS, MRes, Fahd Husain, BMBS, Ali Shah, BSc, MBBS, Hyder Tahir, Bsc, MBBS, Faisel Alam, Bsc, MBBS, MRes, Maaz Khan, BSc, MBBS, Sukanya Ghosh, MBBS   +6 more
doaj   +1 more source

Does Ossification of the Posterior Longitudinal Ligament Progress After Fusion? [PDF]

Neurospine, 2019
Starting in the 1960s, ossification of the posterior longitudinal ligament (OPLL) became more commonly diagnosed in Japan. The disease is characterized by a gradual increase in calcification of the posterior longitudinal ligament with the eventual ...
Sasha Vaziri, Dennis Timothy Lockney, Alexander B. Dru, Adam J. Polifka, W. Christopher Fox, Daniel J. Hoh   +5 more
doaj   +1 more source

Optical orientation of electron spins in GaAs quantum wells [PDF]

, 2004
We present a detailed experimental and theoretical analysis of the optical orientation of electron spins in GaAs/AlAs quantum wells. Using time and polarization resolved photoluminescence excitation spectroscopy, the initial degree of electron spin ...
A. Vinattieri, C. P. Slichter, M. I. Dyakonov, M. I. Dyakonov, M. I. Dyakonov, M. Z. Maialle, R. Winkler, R. Winkler   +7 more
core   +3 more sources

Plug & abandonment of offshore wells: Ensuring long-term well integrity and cost-efficiency

Journal of Petroleum Science and Engineering, 2019
There is an upcoming "P&A wave" of wells that need to be permanently plugged and abandoned, especially in mature, offshore areas such as the North Sea and Gulf of Mexico.
Torbjørn Vrålstad, A. Saasen, E. Fjær, T. Øia, J. D. Ytrehus, M. Khalifeh   +5 more
semanticscholar   +1 more source

Relationship between hospital ward design and healthcare associated infection rates: what does the evidence really tell us? Comment on Stiller et al. 2016

Antimicrobial Resistance and Infection Control, 2017
The systematic review published by Stiller et al. in Antimicrobial Resistance & Infection Control in November 2016 concludes that single-patient bedrooms confer a significant benefit for protecting patients from healthcare associated infection and ...
Jennie Wilson, Andrew Dunnett, Heather Loveday   +2 more
doaj   +1 more source

Adhesion and neurite development of cortical neurons on micropatterns of polyethylenimine and fluorcarbon [PDF]

, 2000
This study aims on the preparation of isolated islands of cortical neurons on modified glass surfaces. Isolated islands of cortical neurons were obtained with a combination of neuron-adhesive polyethylenimine (PEI) and neuron-repellent plasma-deposited ...
Goedbloed, M.H., Ruardij, T.G., Rutten, W.L.C.   +2 more
core   +4 more sources

Lin−CCR2+ hematopoietic stem and progenitor cells overcome resistance to PD-1 blockade

Nature Communications, 2018
Brain tumors are difficult to treat using existing immunotherapeutic strategies. Here, the authors show that in brain tumors resistant to PD-1 blockade, HSCs expressing CCR2+ can reverse treatment resistance and sensitizes mice to immunotherapy.
Catherine T. Flores, Tyler J. Wildes, Jeffrey A. Drake, Ginger L. Moore, Bayli DiVita Dean, Rebecca S. Abraham, Duane A. Mitchell   +6 more
doaj   +1 more source