| 1. |
- Kehoe, Laura, et al.
(författare)
-
Make EU trade with Brazil sustainable
- 2019
-
Ingår i: Science. - : American Association for the Advancement of Science (AAAS). - 0036-8075 .- 1095-9203. ; 364:6438, s. 341-
-
Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)
|
|
| 2. |
- von Haartman, Martin, et al.
(författare)
-
Low-frequency noise and Coulomb scattering in Si0.8Ge0.2 surface channel pMOSFETs with ALD Al2O3 gate dielectrics
- 2005
-
Ingår i: Solid-State Electronics. - : Elsevier BV. - 0038-1101 .- 1879-2405. ; 49:6, s. 907-914
-
Tidskriftsartikel (refereegranskat)abstract
- Carrier mobility and low-frequency noise were investigated in Si0.8Ge0.2 surface channel pMOSFETs with ALD Al2O3 gate dielectrics. The devices were annealed in H2O Vapor, which reduced the negative charge in the gate dielectrics. The carrier mobility was characterized versus change in oxide charge, which allowed an estimation of the Coulomb scattering from the charge in the Al2O3. The low-frequency noise was measured between subthreshold and strong inversion conditions in the H2O annealed and the un-annealed devices. The combined number fluctuation and correlated mobility fluctuation noise model could successfully explain the observed 1/f noise. The mobility fluctuations were negatively correlated to the number fluctuations in the un-annealed devices, which contained a negative oxide charge. In the H2O annealed devices, on the other hand, a positive correlation could be observed. The maximum magnitude of the scattering parameter a was found to be around 1 X 10(4) Vs/C. The H2O annealing was used in this work as a non-destructive tool to modify the charge in the Al2O3, but it can also be a viable method to improve device performance by introducing/passivating charge.
|
|
| 3. |
- Armbruster, Henriet, et al.
(författare)
-
On-board Conversion of Alcohol to Ethers for diesel Engines
- 2000
-
Ingår i: ISAF XIII Paper. International Symposium on Alcohol Fuels. Implementing the Transition to a Sustainable Transport System, Stockholm 3-6 July 2000..
-
Konferensbidrag (refereegranskat)
|
|
| 4. |
- Olsson, Erik, 1965, et al.
(författare)
-
Development of a unified design buckling curve for fibre reinforced polymer plates subjected to in-plane uniaxial and uniform compression
- 2023
-
Ingår i: Thin-Walled Structures. - : Elsevier BV. - 0263-8231. ; 183
-
Tidskriftsartikel (refereegranskat)abstract
- Presented are 24 non-dimensional buckling curves to estimate the strengths of Fibre-Reinforced Polymer (FRP) square plates having four simply supported edges and subjected to in-plane uniaxial and uniform in-plane compression. The curves are constructed by the authors from a parametric numerical analysis using ABAQUS® software with changing variables for: material properties; initial geometrical imperfections; laminate lay-ups; and plate thicknesses. These strength curves express relationships for the buckling reduction factor with plate slenderness, and account for post-buckling strength. We observe that regardless of the laminate lay-up (except for purely unidirectional), the choice of FRP material and the magnitude of the initial geometrical imperfection the predicted buckling reduction factors display a meaningful correlation with plate slenderness. Presented is a proposed unified buckling design curve, defined as the lower bound to 18 of the 24 ABAQUS®-generated buckling curves. This new curve is benchmarked by the authors against experimental test results extracted from the literature and it is found that there is a reasonable agreement. The authors recommend that the proposed buckling design curve has the potential to be introduced into structural design standards as a procedure to design the buckling strengths of FRP plates.
|
|
| 5. |
- Olsson, Pär A T, 1981-, et al.
(författare)
-
All-atomic and coarse-grained molecular dynamics investigation of deformation in semi-crystalline lamellar polyethylene
- 2018
-
Ingår i: Polymer. - : Elsevier Ltd. - 0032-3861 .- 1873-2291. ; 153, s. 305-316
-
Tidskriftsartikel (refereegranskat)abstract
- In the present work we have performed classical molecular dynamics modelling to investigate the effects of different types of force-fields on the stress-strain and yielding behaviours in semi-crystalline lamellar stacked linear polyethylene. To this end, specifically the all-atomic optimized potential for liquid simulations (OPLS-AA) and the coarse-grained united-atom (UA) force-fields are used to simulate the yielding and tensile behaviour for the lamellar separation mode. Despite that the considered samples and their topologies are identical for both approaches, the results show that they predict widely different stress-strain and yielding behaviours. For all UA simulations we obtain oscillating stress-strain curves accompanied by repetitive chain transport to the amorphous region, along with substantial chain slip and crystal reorientation. For the OPLS-AA modelling primarily cavitation formation is observed, with small amounts of chain slip to reorient the crystal such that the chains align in the tensile direction. This force-field dependence is rooted in the lack of explicit H-H and C-H repulsion in the UA approach, which gives rise to underestimated ideal critical resolved shear stress. The computed critical resolved shear stress for the OPLS-AA approach is in good agreement with density functional theory calculations and the yielding mechanisms resemble those of the lamellar separation mode. The disparate energy and shear stress barriers for chain slip of the different models can be interpreted as differently predicted intrinsic activation rates for the mechanism, which ultimately are responsible for the observed diverse responses of the two modelling approaches. © 2018 Elsevier Ltd
|
|
| 6. |
- Ahrentorp, Fredrik, et al.
(författare)
-
Effective particle magnetic moment of multi-core particles
- 2015
-
Ingår i: Journal of Magnetism and Magnetic Materials. - : Elsevier BV. - 0304-8853 .- 1873-4766. ; 380, s. 221-226
-
Tidskriftsartikel (refereegranskat)abstract
- In this study we investigate the magnetic behavior of magnetic multi-core particles and the differences in the magnetic properties of multi-core and single-core nanoparticles and correlate the results with the nanostructure of the different particles as determined from transmission electron microscopy (TEM). We also investigate how the effective particle magnetic moment is coupled to the individual moments of the single-domain nanocrystals by using different measurement techniques: DC magnetometry, AC susceptometry, dynamic light scattering and TEM. We have studied two magnetic multi-core particle systems BNF Starch from Micromod with a median particle diameter of 100 am and FeraSpin R from nanoPET with a median particle diameter of 70 nm - and one single-core particle system - SHP25 from Ocean NanoTech with a median particle core diameter of 25 nm. (C) 2014 Elsevier B.V. All rights reserved.
|
|
| 7. |
- Qiu, Zhijun, et al.
(författare)
-
Role of Si implantation in control of underlap length in Schottky-barrier source/drain MOSFETs on ultrathin body SOI
- 2008
-
Ingår i: Proceedings of ULIS. - NEW YORK : IEEE. ; , s. 175-178, s. 175-178
-
Konferensbidrag (refereegranskat)abstract
- This works demonstrates a novel approach using Si implantation prior to Pt deposition and PtSi formation to control the underlap length between the PtSi source/drain regions to the gate in Schottky-Barrier (SB-) MOSFETs. Dopant segregation at the PtSi/Si interface is used to enhance device performance. With the lon /Ioff current ratio as an indicator, optimized Si implant doses are found for both n- and p-channel SB-MOSFETs. Through an effective barrier width, the underlap length has direct implication on the leakage current.
|
|
| 8. |
- Chen, Jingjing, 1982, et al.
(författare)
-
Experimental demonstration of RF-pilot-based phase noise mitigation for millimeter-wave systems
- 2014
-
Ingår i: IEEE Vehicular Technology Conference. - 1550-2252. - 9781479944491 ; , s. Art. no. 6965978-
-
Konferensbidrag (refereegranskat)abstract
- Millimeter-wave bands are gaining popularity for high data rate wireless communication systems due to the wide available bandwidth. However, oscillator phase noise also increases as the carrier frequency increases. Methods of phase noise mitigation are therefore crucial for future millimeter-wave systems. In this work, we propose to adopt analog phase noise mitigation using an RF-pilot tone, which reduces both phase and frequency impairments of an arbitrary millimeter-wave signal at the expense of reduced spectral efficiency. The method is verified experimentally at carrier frequency of 28 GHz and E-band 73 GHz showing a 20 dB noise reduction up to 100 kHz offset. Since the method relaxes phase noise requirement it is attractive for phase noise sensitive technologies at high carrier frequency, such as OFDM used in LTE. As indicated by the simulation results, the reduced phase noise enables a LTE signal on a millimeter-wave carrier with marginal performance impact.
|
|
| 9. |
|
|
| 10. |
- Musulin, Estanislao, et al.
(författare)
-
Closing the Information Loop in Recipe-Based Batch Production
- 2005
-
Ingår i: European Symposium on Computer-Aided Process Engineering-15 : 38th European Symposium of the Working Party on Computer Aided Process Engineering : ESCAPE-15 (Computer-aided chemical engineering). - 1570-7946. - 0444519874 ; 20, s. 1381-1386
-
Konferensbidrag (refereegranskat)abstract
- In addition to the basic regulatory functions, a batch control system must support production planning and scheduling, recipe management, resource allocation, batch report generation, unit supervision and exception handling. A closed-loop framework is presented in this work that integrates decision support tools required at the different levels of a decision-making hierarchical batch control system. Specifically, the proposed framework consists of a reactive batch scheduler (MOPP) and a fault diagnosis system (ExSit-M) developed by the Universitat Politècnica de Catalunya, and a S88-recipe-based coordinator (JGrafchart) developed by the Lund University. These tools need to exchange information to obtain optimal utilization of the production plant. The complete integrated system is built using a general recipe description and other guidelines from ISA S88 standard.
|
|
