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2. Rechtspraak Arbeidsrecht

Author

Jaspers, A.Ph.C.M., Konijn, Y., Houweling, A.R., de Valk, S.N., and Protecting European Citizens and Market Participants

Published
2013

3. Het wijzigingsbeding remixed

Author

van Slooten, J.M., Houweling, A.R., Bungener, A.F., Grapperhaus, F.B.J., Konijn, Y., and Overig Onderzoek HSI (FdR)

Published
2010

4. Adapting work to the worker

Author

Bouwens, W.H.A.C.M., Burger, P.H., Veldman, A., Pennings, F.J.L., Konijn, Y., Constitutional and Administrative Law, and Balancing Public and Private Interests

Published
2008

6. Dismissal law proposals and the flexicurity strategy

Author

Verhulp, E., Cuypers, D., Pennings, F., Konijn, Y., Veldman, A., and dp13 Herschikking van bevoegdheden en verantwoordelijkheden ten aanzien van de vormgeving van arbeidsverhoudingen

Published
2008

9. Introduction

Author

Veldman, A., Pennings, F.J.L., Konijn, Y., and Tilburg Law School

Published
2008

13. Conclusions

Author

Veldman, A., Pennings, F.J.L., Konijn, Y., and Tilburg Law School

Published
2008

14. Rechtspraak Arbeidsrecht

Author

Jaspers, A.Ph.C.M., Konijn, Y., Loonstra, C.J., Zondag, W.A., and Faculteit Rechtsgeleerdheid

Published
2005

15. Arbeidsrecht

Author

van der Helm, I, Loonstra, Cees, Hoogendijk, B, Jaspers, APHCM, Konijn, Y, Zondag, WA, and Labour Law

Published
2003

16. Arbeidsrecht

Author

van der Helm, I., Hoogendijk, B., Jaspers, A.Ph.C.M., Konijn, Y., Loonstra, C.J., Zondag, W.A., and Faculteit Rechtsgeleerdheid

Published
2003

17. Geslacht en Arbeidsduur

Author

Asscher-Vonk, I.P., Konijn, Y., and Loenen, T

Subjects
Labour Law, Onderneming en Sociaal Recht
Abstract

Item does not contain fulltext

Published
2000

19. Geslacht en Arbeidsduur

Author

Loenen, T, Asscher-Vonk, I.P., Konijn, Y., Loenen, T, Asscher-Vonk, I.P., and Konijn, Y.

Abstract

Item does not contain fulltext

Published
2000

20. Investigating the Potential of Thin Silicon Nitride Membranes in Fiber-Based Photoacoustic Sensing.

Author

Konijn Y, Salumbides E, and Akca BI

Abstract

The detection of methane, a strong greenhouse gas, has increased in importance due to rising emissions, which partly originate from unreported and undetected leaks in oil and gas fields. The gas emitted by these leaks could be detected using an optical fiber-based photoacoustic sensor called PAS-WRAP. Here, we investigate the potential of silicon-based membranes as more sensitive microphones in the PAS-WRAP concept. Toward this goal, we built a setup with which the frequency response of the membranes was interrogated by an optical fiber. Multiple mounting mechanisms were tested by adapting commercial interferometry systems (OP1550, ZonaSens, Optics11 B.V.) to our case. Finally, methane detection was attempted using a silicon nitride membrane as a sensor. Our findings show a quality factor of 2.4 at 46 kHz and 33.6 at 168 kHz for a thin silicon nitride membrane. This membrane had a frequency response with a signal-to-background ratio of 1 ± 0.7 at 44 kHz when tested in a vacuum chamber with 4% methane at 0.94 bar. The signal-to-background ratio was not significant for methane detection; however, we believe that the methods and experimental procedures that we used in this work can provide a useful reference for future research into gas trace detection with optical fiber-based photoacoustic spectroscopy.

Published
2023
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