130 research outputs found
Electron Mobility and Magneto Transport Study of Ultra-Thin Channel Double-Gate Si MOSFETs
We report on detailed room temperature and low temperature transport
properties of double-gate Si MOSFETs with the Si well thickness in the range
7-17 nm. The devices were fabricated on silicon-on-insulator wafers utilizing
wafer bonding, which enabled us to use heavily doped metallic back gate. We
observe mobility enhancement effects at symmetric gate bias at room
temperature, which is the finger print of the volume inversion/accumulation
effect. An asymmetry in the mobility is detected at 300 K and at 1.6 K between
the top and back interfaces of the Si well, which is interpreted to arise from
different surface roughnesses of the interfaces. Low temperature peak
mobilities of the reported devices scale monotonically with Si well thickness
and the maximum low temperature mobility was 1.9 m2/Vs, which was measured from
a 16.5 nm thick device. In the magneto transport data we observe single and two
sub-band Landau level filling factor behavior depending on the well thickness
and gate biasing
Online and Offline Social Participation and Social Poverty Traps: Can Social Networks Save Human Relations?
Boosting cross-border regions through better cross-border transport services. The European case
Cross-border regions are the laboratories of European integration. Daily interactions across European borders let citizens experience the benefits of the European Union (EU) internal market. Still, many border barriers continue to prevent individuals and organisations from exploiting the full-potential of European border regions and the benefits of a more integrated European territory. Amongst these barriers are the absence or inappropriate supply of cross-border public transport services. In this context, this paper presents potential policy tools to increase border permeability related to cross-border public transport as well as practical results from a few case-studies implemented across Europe.info:eu-repo/semantics/publishedVersio
XQR-30: the ultimate XSHOOTER quasar sample at the reionization epoch
The final phase of the reionization process can be probed by rest-frame UV
absorption spectra of quasars at z>6, shedding light on the properties of the
diffuse intergalactic medium within the first Gyr of the Universe. The ESO
Large Programme "XQR-30: the ultimate XSHOOTER legacy survey of quasars at
z~5.8-6.6" dedicated ~250 hours of observations at the VLT to create a
homogeneous and high-quality sample of spectra of 30 luminous quasars at z~6,
covering the rest wavelength range from the Lyman limit to beyond the MgII
emission. Twelve quasar spectra of similar quality from the XSHOOTER archive
were added to form the enlarged XQR-30 sample, corresponding to a total of ~350
hours of on-source exposure time. The median effective resolving power of the
42 spectra is R~11400 and 9800 in the VIS and NIR arm, respectively. The
signal-to-noise ratio per 10 km/s pixel ranges from ~11 to 114 at \AA rest frame, with a median value of ~29. We describe the
observations, data reduction and analysis of the spectra, together with some
first results based on the E-XQR-30 sample. New photometry in the H and K bands
are provided for the XQR-30 quasars, together with composite spectra whose
characteristics reflect the large absolute magnitudes of the sample. The
composite and the reduced spectra are released to the community through a
public repository, and will enable a range of studies addressing outstanding
questions regarding the first Gyr of the Universe.Comment: 21 pages, 10 figures. Revised version resubmitted to MNRAS after
minor referee repor
XQR-30: The ultimate XSHOOTER quasar sample at the reionization epoch
The final phase of the reionization process can be probed by rest-frame UV absorption spectra of quasars at z ≳ 6, shedding light on the properties of the diffuse intergalactic medium within the first Gyr of the Universe. The ESO Large Programme 'XQR-30: the ultimate XSHOOTER legacy survey of quasars at z ≃ 5.8-6.6' dedicated ∼250 h of observations at the VLT to create a homogeneous and high-quality sample of spectra of 30 luminous quasars at z ∼6, covering the rest wavelength range from the Lyman limit to beyond the Mg ii emission. Twelve quasar spectra of similar quality from the XSHOOTER archive were added to form the enlarged XQR-30 sample, corresponding to a total of ∼350 h of on-source exposure time. The median effective resolving power of the 42 spectra is R ≃ 11 400 and 9800 in the VIS and NIR arm, respectively. The signal-to-noise ratio per 10 km s-1 pixel ranges from ∼11 to 114 at λ ≃ 1285 Å rest frame, with a median value of ∼29. We describe the observations, data reduction, and analysis of the spectra, together with some first results based on the E-XQR-30 sample. New photometry in the H and K bands are provided for the XQR-30 quasars, together with composite spectra whose characteristics reflect the large absolute magnitudes of the sample. The composite and the reduced spectra are released to the community through a public repository, and will enable a range of studies addressing outstanding questions regarding the first Gyr of the Universe
Custom Integrated Circuits
Contains table of contents for Part III, table of contents for Section 1 and reports on eleven research projects.IBM CorporationMIT School of EngineeringNational Science Foundation Grant MIP 94-23221Defense Advanced Research Projects Agency/U.S. Army Intelligence Center Contract DABT63-94-C-0053Mitsubishi CorporationNational Science Foundation Young Investigator Award Fellowship MIP 92-58376Joint Industry Program on Offshore Structure AnalysisAnalog DevicesDefense Advanced Research Projects AgencyCadence Design SystemsMAFET ConsortiumConsortium for Superconducting ElectronicsNational Defense Science and Engineering Graduate FellowshipDigital Equipment CorporationMIT Lincoln LaboratorySemiconductor Research CorporationMultiuniversity Research IntiativeNational Science Foundatio
Custom Integrated Circuits
Contains reports on nine research projects.Analog Devices, Inc.International Business Machines CorporationJoint Services Electronics Program Contract DAAL03-89-C-0001U.S. Air Force - Office of Scientific Research Contract AFOSR 86-0164BDuPont CorporationNational Science Foundation Grant MIP 88-14612U.S. Navy - Office of Naval Research Contract N00014-87-K-0825American Telephone and TelegraphDigital Equipment CorporationNational Science Foundation Grant MIP 88-5876
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