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Institution

Helsinki University of Technology

About: Helsinki University of Technology is a based out in . It is known for research contribution in the topics: Thin film & Vortex. The organization has 8962 authors who have published 20136 publications receiving 723787 citations. The organization is also known as: TKK & Teknillinen korkeakoulu.


Papers
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Journal ArticleDOI
TL;DR: The novel fabrication method of the polymer-free absorber and device parameters determined using nonlinear reflectivity measurement are described in detail and the observed operation bandwidth of approximately 1 microm is the broadest reported to date for a single carbon nanotube-based saturable absorber.
Abstract: Mode-locked sub-picosecond operation of Yb-, Er- and Tm:Hodoped fiber lasers operating at 1.05 microm, 1.56 microm and 1.99 microm, respectively, is demonstrated using the same sample carbon nanotube-based saturable absorber mirror. A mesh of single-walled carbon nanotubes was deposited on an Ag-mirror using a one-step dry-transfer contact press method to combine broadband saturable absorption and high reflectance properties. The novel fabrication method of the polymer-free absorber and device parameters determined using nonlinear reflectivity measurement are described in detail. To our knowledge the observed operation bandwidth of approximately 1 microm is the broadest reported to date for a single carbon nanotube-based saturable absorber.

234 citations

Journal ArticleDOI
TL;DR: It is shown that vibrotactile stimuli, applied on the palm and fingers of a congenitally deaf adult, activated his auditory cortices and recorded magnetoencephalographic signals indicated that the auditory Cortices were able to discriminate between the applied 180 Hz and 250 Hz vibration frequencies.

234 citations

Journal ArticleDOI
TL;DR: In this article, the authors propose an interactive process of preference programming which allows the decision maker to enter ambiguous preference statements by indicating the relative importance of factors as intervals of values on a ratio scale, and synthesize the interval judgments into dominance relations on the alternatives by solving a series of linear programming problems.

233 citations

Journal ArticleDOI
01 Nov 2008-Traffic
TL;DR: This study employs atomistic simulations and experiments to characterize a cholesterol compound with fluorescent boron dipyrromethene difluoride linked to sterol carbon‐24 (BODIPY‐cholesterol), and concludes that this new probe closely mimics the membrane partitioning and trafficking of cholesterol and enables the direct monitoring of sterol movement by time‐lapse imaging using trace amounts of the probe.
Abstract: Analysis of sterol distribution and transport in living cells has been hampered by the lack of bright, photostable fluorescent sterol derivatives that closely resemble cholesterol. In this study, we employed atomistic simulations and experiments to characterize a cholesterol compound with fluorescent boron dipyrromethene difluoride linked to sterol carbon-24 (BODIPY-cholesterol). This probe packed in the membrane and behaved similarly to cholesterol both in normal and in cholesterol-storage disease cells and with trace amounts allowed the visualization of sterol movement in living systems. Upon injection into the yolk sac, BODIPY-cholesterol did not disturb zebrafish development and was targeted to sterol-enriched brain regions in live fish. We conclude that this new probe closely mimics the membrane partitioning and trafficking of cholesterol and, because of its excellent fluorescent properties, enables the direct monitoring of sterol movement by time-lapse imaging using trace amounts of the probe. This is, to our knowledge, the first cholesterol probe that fulfills these prerequisites.

233 citations

Journal ArticleDOI
TL;DR: The paper presents a control system being built at Helsinki University of Technology, which is based on distributed programming, and wireless identification technologies, which enables the material flows in the project delivery chains to be controlled from the inside of the material flow itself.

232 citations


Authors

Showing all 8962 results

NameH-indexPapersCitations
Ashok Kumar1515654164086
Hannu Kurki-Suonio13843399607
Nicolas Gisin12582764298
Anne Lähteenmäki11648581977
Riitta Hari11149143873
Andreas Richter11076948262
Mika Sillanpää96101944260
Markku Leskelä9487636881
Ullrich Scherf9273536972
Mikko Ritala9158429934
Axel H. E. Müller8956430283
Karl Henrik Johansson88108933751
T. Poutanen8612033158
Elina Lindfors8642023846
Günter Breithardt8555433165
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Performance
Metrics
No. of papers from the Institution in previous years
YearPapers
2021154
2020153
2019155
201851
201714
201630