Simultaneous increase in remanence and coercivity during grain refining of Nd-Fe-B deformed magnets

2021 ◽  
Author(s):  
Fengqing Wang ◽  
Kanghua Chen ◽  
Juan Du ◽  
Jian Zhang
Keyword(s):  
Simultaneous Increase ◽  
Grain Refining

Provisional and Complex Techniques for Bifurcation Treatment – Trading Apposition for Scaffolding?

2012 ◽  
Vol 7 (1) ◽  
pp. 44
Author(s):  
Nicolas Foin ◽  
Eduardo Alegria-Barrero ◽  
Ryo Torii ◽  
Pak H Chan ◽  
Ajay K Jain ◽  
...  
Keyword(s):  
Myocardial Infarction ◽  
New Technology ◽  
Coronary Intervention ◽  
Target Lesion ◽  
Side Branch ◽  
Simultaneous Increase ◽  
Stent Restenosis ◽  
Percutaneous Coronary ◽  
Stent Coverage ◽  
Bifurcation Lesions

Provisional T-stenting with stenting of the main branch and optional side branch (SB) stenting in the case of significant SB occlusion with thrombolysis in myocardial infarction (TIMI) flow <3 is the strategy chosen nowadays by most interventionalists for treating simple bifurcation lesions. Percutaneous coronary intervention (PCI) of complex true bifurcation lesions remains, however, the subject of debate: treatment of complex bifurcation lesions requires more time than treatment of simple bifurcations and can lead to significantly higher rates of restenosis, target lesion revascularisation and myocardial infarction. Current bifurcation techniques often fail to ensure continuous stent coverage of the SB ostium and of the two bifurcation branches without a simultaneous increase in the rate of malapposed struts. Stent struts left unapposed in the lumen disturb blood flow and are increasingly recognised as increasing the risk of stent thrombosis and focal in-stent restenosis, limiting the success of stent procedures in these lesions. New technology and dedicated designs may, in the near future, overcome such limitations of conventional two-stent bifurcation strategies.

Improving the efficiency of oilfield electric power distribution

2019 ◽  
pp. 79-87
Author(s):  
Yu. F. Yu. F. Romaniuk ◽  
О. V. Solomchak ◽  
М. V. Hlozhyk
Keyword(s):  
Power Distribution ◽  
Reactive Power ◽  
Power Transmission ◽  
Transmission Efficiency ◽  
Active Power ◽  
Oil Field ◽  
Total Power ◽  
Simultaneous Increase ◽  
Active Load ◽  
Step Down

The issues of increasing the efficiency of electricity transmission to consumers with different nature of their load are considered. The dependence of the efficiency of the electric network of the oil field, consisting of a power line and a step-down transformer, on the total load power at various ratios between the active and reactive components of the power is analyzed, and the conditions under which the maximum transmission efficiency can be ensured are determined. It is shown by examples that the power transmission efficiency depends not only on the active load, but also largely on its reactive load. In the presence of a constant reactive load and an increase in active load, the total power increases and the power transmission efficiency decreases. In the low-load mode, the schedule for changing the power transmission efficiency approaches a parabolic form, since the influence of the active load on the amount of active power loss decreases, and their value will mainly depend on reactive load, which remains unchanged. The efficiency reaches its maximum value provided that the active and reactive components of the power are equal. In the case of a different ratio between them, the efficiency decreases. With a simultaneous increase in active and reactive loads and a constant value of the power factor, the power transmission efficiency is significantly reduced due to an increase in losses. With a constant active load and an increase in reactive load, efficiency of power transmission decreases, since with an increase in reactive load, losses of active power increase, while the active power remains unchanged. The second condition, under which the line efficiency will be maximum, is full compensation of reactive power.  Therefore, in order to increase the efficiency of power transmission, it is necessary to compensate for the reactive load, which can reduce the loss of electricity and the cost of its payment and improve the quality of electricity. Other methods are also proposed to increase the efficiency of power transmission by regulating the voltage level in the power center, reducing the equivalent resistance of the line wires, optimizing the loading of the transformers of the step-down substations and ensuring the economic modes of their operation.

Grain-refining and strengthening mechanisms of bulk ultrafine grained CP-Ti processed by L-ECAP and MDF

2021 ◽  
Vol 83 ◽  
pp. 196-207
Author(s):  
Peng-Cheng Zhao ◽  
Guang-Jian Yuan ◽  
Run-Zi Wang ◽  
Bo Guan ◽  
Yun-Fei Jia ◽  
...  
Keyword(s):  
Grain Refining ◽  
Strengthening Mechanisms ◽  
Ultrafine Grained ◽  
Cp Ti

scholarly journals A Reversible Shift of Driver Dependence from EGFR to Notch1 in Non-Small Cell Lung Cancer as a Cause of Resistance to Tyrosine Kinase Inhibitors

Cancers ◽  
2021 ◽  
Vol 13 (9) ◽  
pp. 2022
Author(s):  
Francesca Iommelli ◽  
Viviana De Rosa ◽  
Cristina Terlizzi ◽  
Rosa Fonti ◽  
Rosa Camerlingo ◽  
...  
Keyword(s):  
Kinase Inhibitors ◽  
Epithelial Mesenchymal Transition ◽  
Parental Cell ◽  
Egfr Inhibitors ◽  
Simultaneous Increase ◽  
Adherent Cells ◽  
Binding Assays ◽  
Mesenchymal Transition ◽  
Dose Dependent Decrease ◽  
Dose Dependent

Notch1 plays a key role in epithelial-mesenchymal transition (EMT) and in the maintenance of cancer stem cells. In the present study we tested whether high levels of activated Notch1 in oncogene-driven NSCLC can induce a reversible shift of driver dependence from EGFR to Notch1, and thus causing resistance to EGFR inhibitors. Adherent cells (parental) and tumor spheres (TS) from NSCLC H1975 cells and patient-derived CD133-positive cells were tested for EGFR and Notch1 signaling cascade. The Notch1-dependent modulation of EGFR, NCID, Hes1, p53, and Sp1 were then analyzed in parental cells by binding assays with a Notch1 agonist, DLL4. TS were more resistant than parental cells to EGFR inhibitors. A strong upregulation of Notch1 and a concomitant downregulation of EGFR were observed in TS compared to parental cells. Parental cell exposure to DLL4 showed a dose-dependent decrease of EGFR and a simultaneous increase of NCID, Hes1, p53, and Sp1, along with the dislocation of Sp1 from the EGFR promoter. Furthermore, an enhanced interaction between p53 and Sp1 was observed in TS. In NSCLC cells, high levels of active Notch1 can promote a reversible shift of driver dependence from EGFR to Notch1, leading to resistance to EGFR inhibitors.

Effects of microstructure and lattice misfit on creep life of Ni-based single crystal superalloy during long-term thermal exposure

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Wenyan Gan ◽  
Hangshan Gao ◽  
Haiqing Pei ◽  
Zhixun Wen
Keyword(s):  
Single Crystal ◽  
Rupture Life ◽  
Precipitation Amount ◽  
Lattice Misfit ◽  
Thermal Exposure ◽  
Phase Evolution ◽  
Creep Rupture ◽  
Simultaneous Increase ◽  
Creep Life ◽  
The Matrix

Abstract According to the microstructural evolution during longterm thermal exposure at 1100 °C, the creep rupture life of Ni-based single crystal superalloys at 980 °C/270 MPa was evaluated. The microstructure was characterized by means of scanning electron microscopy, X-ray diffraction and related image processing methods. The size of γ’ precipitates and the precipitation amount of topologically close-packed increased with the increase in thermal exposure time, and coarsening of the γ’ precipitates led to the simultaneous increase of the matrix channel width. The relationship between the creep rupture life and the lattice misfit of γ/γ’, the coarsening of γ’ precipitate and the precipitation of TCP phase are systematically discussed. In addition, according to the correlation between γ’ phase evolution and creep characteristics during thermal exposure, a physical model is established to predict the remaining creep life.

scholarly journals Winds in the Lower Cloud Level on the Nightside of Venus from VIRTIS-M (Venus Express) 1.74 μm Images

Atmosphere ◽  
2021 ◽  
Vol 12 (2) ◽  
pp. 186
Author(s):  
Dmitry A. Gorinov ◽  
Ludmila V. Zasova ◽  
Igor V. Khatuntsev ◽  
Marina V. Patsaeva ◽  
Alexander V. Turin
Keyword(s):  
Wind Speed ◽  
Meridional Wind ◽  
Equatorial Region ◽  
Hadley Cell ◽  
Horizontal Wind ◽  
Simultaneous Increase ◽  
Volcanic Area ◽  
Infrared Thermal Imaging ◽  
Latitude Range ◽  
Lower Cloud

The horizontal wind velocity vectors at the lower cloud layer were retrieved by tracking the displacement of cloud features using the 1.74 µm images of the full Visible and InfraRed Thermal Imaging Spectrometer (VIRTIS-M) dataset. This layer was found to be in a superrotation mode with a westward mean speed of 60–63 m s−1 in the latitude range of 0–60° S, with a 1–5 m s−1 westward deceleration across the nightside. Meridional motion is significantly weaker, at 0–2 m s−1; it is equatorward at latitudes higher than 20° S, and changes its direction to poleward in the equatorial region with a simultaneous increase of wind speed. It was assumed that higher levels of the atmosphere are traced in the equatorial region and a fragment of the poleward branch of the direct lower cloud Hadley cell is observed. The fragment of the equatorward branch reveals itself in the middle latitudes. A diurnal variation of the meridional wind speed was found, as east of 21 h local time, the direction changes from equatorward to poleward in latitudes lower than 20° S. Significant correlation with surface topography was not found, except for a slight decrease of zonal wind speed, which was connected to the volcanic area of Imdr Regio.

Policing gentrification or policing displacement? Testing the relationship between order maintenance policing and neighbourhood change in Los Angeles

Urban Studies ◽  
2021 ◽  
pp. 004209802199335
Author(s):  
Charles R. Collins ◽  
Forrest Stuart ◽  
Patrick Janulis
Keyword(s):  
Los Angeles ◽  
Low Income ◽  
Quantitative Research ◽  
Police Department ◽  
Relative Displacement ◽  
Simultaneous Increase ◽  
Census Tracts ◽  
Order Maintenance ◽  
Neighbourhood Change ◽  
Number Of Citations

Urban scholars increasingly contend that local police departments play a central role in facilitating neighbourhood change. Recent critics warn that ‘order maintenance’ policing and other low-level law enforcement tactics are deployed in gentrifying areas to displace ‘disorderly’ populations. Despite influential qualitative case studies, there remains scant quantitative research testing this relationship, and few studies that evaluate the link between policing, displacement and gentrification. We address this lacuna, drawing on new citation data from the Los Angeles Police Department (LAPD) and employing a measure of neighbourhood change that focuses on the displacement of low-income residents. Examining policing patterns in 978 US Census tracts in Los Angeles over four years, our analysis reveals that tracts experiencing gentrification – defined as the simultaneous increase in non-poor residents and decrease in the number of people in poverty – experience a greater number of citations compared with other tract types. Similar patterns emerge in our analysis of citations that explicitly target homelessness and extreme poverty. In post-hoc analyses, we found that Census tracts characterised by a decrease in the number of people in poverty experienced greater numbers of total police citations and of citations targeting homeless individuals, compared with other tract types. These findings carry important theoretical implications for understanding the divergent manifestations of, and potential mechanisms driving, order maintenance policing. Methodologically, we contend that police citations provide a more precise measure of order maintenance policing compared with previous studies, and that classifying neighbourhoods in terms of relative displacement of residents in poverty provides much-needed interpretive clarity.

Simultaneous increase in electrical conductivity and fatigue strength of Cu-Ni-Si alloy by utilizing discontinuous precipitates

2021 ◽  
Vol 288 ◽  
pp. 129353
Author(s):  
M. Goto ◽  
T. Yamamoto ◽  
S.Z. Han ◽  
T. Utsunomiya ◽  
S. Kim ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Fatigue Strength ◽  
Simultaneous Increase

Grain refining of casting alloys by a melting control technique

1996 ◽  
Vol 9 (4) ◽  
pp. 187-193 ◽  
Author(s):  
Xu Darning ◽  
Li Qingchun ◽  
Robert D. Pehlke
Keyword(s):  
Control Technique ◽  
Grain Refining ◽  
Casting Alloys
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