Results 21 to 30 of about 476,218 (260)

Investigation on Long Term Operation of Thermochemical Heat Storage with MgO-Based Composite Honeycombs

Energies, 2019
The efficient storing and utilizing of industrial waste heat can contribute to the reduction of CO2 and primary energy. Thermochemical heat storage uses a chemical and/or an adsorption-desorption reaction to store heat without heat loss.
Jae Yong Lee, Taesu Yim, Hyouck Ju Kim, Sungkook Hong, Doo Won Seo, Hong Soo Kim   +5 more
doaj   +1 more source

The Long-Term Operating Performance of European Mergers and Acquisitions [PDF]

SSRN Electronic Journal, 2006
Abstract: We investigate the long-term profitability of corporate takeovers of which both the acquiring and target companies are from Continental Europe or the UK. We employ four different measures of operating performance that allow us to overcome a number of measurement limitations of the previous literature, which yielded inconsistent conclusions ...
Martynova, M., Oosting, S., Renneboog, L.D.R.   +2 more
openaire   +7 more sources

NPP Unit Life Management based on Digital Twin Application [PDF]

E3S Web of Conferences, 2020
IAEA activities on ageing management started in 1990 are a part of NPP Units life management or License Renewal as specified in national regulatory documents of member countries.
Arzhaev Alexander, Arzhaev Alexey, Makhanev Valentin, Antonov Mikhail, Emelianov Anton, Kalyutik Aleksander, Karyakin Yury, Kurakin Maksim, Lyashenko Daniil, Arzhaev Kirill, Denisov Ilya   +10 more
doaj   +1 more source

Long-term operation and performance of cryogenic sapphire oscillators [PDF]

IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 2006
Cryogenic Sapphire Oscillators (CSO) developed at UWA have now been in operation around the world continuously for many years. Such oscillators, due to their excellent spectral purity are essential for interrogating atomic frequency standards at the limit of quantum projection noise; otherwise aliasing effects will dominate the frequency stability due ...
Tobar, M. E., Ivanov, E. N., Locke, C. R., Stanwix, P. L., Hartnett, J. G., Luiten, A. N., Warrington, R. B., Fisk, P. T. H., Lawn, M. A., Wouters, M. J., Bize, S., Santarelli, G., Wolf, P., Clairon, A., Guillemot, P.   +14 more
openaire   +3 more sources

LONG-TERM RESULTS OF SURGICAL TREATMENT OF PATIENTS WITH FOLLICULAR TUMORS OF THE THYROID

Вестник хирургии имени И.И. Грекова, 2015
The article analyzed an experience of treatment of 51 patients with follicular tumors. It was proved, that there weren’t any complications and recurrences in case of typically performed operation and adequate replacement therapy in postoperative period ...
I. N. Zubarovskiy, M. V. Mikhailova, S. K. Osipenko   +2 more
doaj   +1 more source

Physical Nature of Strengthening Mechanisms During Extremely Long-Term Operation of Rails

Известия Алтайского государственного университета, 2021
The quantitative estimation of strengthening mechanisms of rails’ surface layer is carried out on the basis of regularities and formation mechanisms of structure-phase states revealed by the methods of modern physical materials science.
Юрий Федорович Иванов, Антон Алексеевич Юрьев, Василий Евгеньевич Кормышев, Сичжан Чэнь, Вадим Борисович Костерев, Виктор Евгеньевич Громов   +5 more
doaj   +1 more source

Simulation Analysis on the Heat Performance of Deep Borehole Heat Exchangers in Medium-Depth Geothermal Heat Pump Systems

Energies, 2020
Deep borehole heat exchangers (DBHEs) extract heat from the medium-depth geothermal energy with the depth of 2−3 km and provide high-temperature heat source for the medium-depth geothermal heat pump systems (MD-GHPs). This paper focuses on the heat
Jiewen Deng, Qingpeng Wei, Shi He, Mei Liang, Hui Zhang   +4 more
doaj   +1 more source

Feasibility of Safe Operation of WWER-440-Type Nuclear Power Plants for Up to 60–70 Years

Energies, 2023
Most WWER-440 reactors are operated over the planned operational lifetime of 30 years. Now, the owners/operators are preparing for the second phase of extending the operation.
Tamás János Katona, Ágnes Biro, Sándor Rátkai   +2 more
doaj   +1 more source

Long-term results of the “Palliative” mustard operation

Journal of the American College of Cardiology, 1985
A long-term follow-up study after 41 palliative Mustard operations for transposition of the great arteries and pulmonary vascular obstructive disease is presented. The operations were performed from 1973 to 1980. Mean pulmonary arteriolar resistance was 13.96 +/- 6.7 Um2. A ventricular septal defect was not closed in 34 patients; in 7 it was created at
Dhasmana, Janardan P., Stark, Jaroslav, de Leval, Marc, Macartney, Fergus J., Rees, Philip G., Taylor, James F.N.   +5 more
openaire   +2 more sources

Changing the mechanical characteristics of cracking pipes during their long‑term operation

Литьë и металлургия
The article presents the results of a study on the strength characteristics (tensile strength) of cracking pipes after prolonged operation. It was found that the strength properties of the pipe material deteriorated, while plasticity characteristics ...
S. V. Pilipenko, A. V. Dudan, O. P. Shtempel, T. V. Vigerina   +3 more
doaj   +1 more source