Kai Morgan Kjølerbakken

• Kjølerbakken, Kai Morgan; Miloch, Wojciech Jacek; Martinsen, Ørjan Grøttem; Pabst, Oliver & Røed, Ketil (2022). Numerical Study of Non-Linear Effects for a Swept Bias Langmuir Probe. IEEE Transactions on Plasma Science. ISSN 0093-3813. doi: 10.1109/TPS.2022.3164220. Vis sammendrag

  We present a numerical study disclosing non-linear effects and hysteresis loops for a swept bias Langmuir probe. A full kinetic particle in cell (PIC) model has been used to study the temporal sheath effects and the probe current. Langmuir "close to steady state" condition is required to characterize the plasma. However, during operations above frequencies normally used, capacitive and non-linear resistive effects are being unveiled. We demonstrate how ion and electron density and temperature change properties of the probe-plasma system. We also show that a swept Langmuir probe exhibits essential properties described as the "fingerprint of memristors" and how a Langmuir probe can be identified as a transversal memristor. Understanding non-linear processes might enable new ways to operate Langmuir probes with higher sampling rates and better accuracy.

• Kjølerbakken, Kai Morgan; Miloch, Wojciech Jacek & Røed, Ketil (2021). The influence of probe spacing and probe bias in a double Langmuir probe setup. AIP Advances. ISSN 2158-3226. 11. doi: 10.1063/5.0058540. Fulltekst i vitenarkiv
• Hafizovic, Ines; Nilsen, Carl-Inge Colombo; Kjølerbakken, Kai Morgan & Jahr, Vibeke (2012). Design and implementation of a MEMS microphone array system for real-time speech acquisition. Applied Acoustics. ISSN 0003-682X. 73(2), s. 132–143. doi: 10.1016/j.apacoust.2011.07.009.
• Hafizovic, Ines; Nilsen, Carl-Inge Colombo & Kjølerbakken, Kai Morgan (2010). Acoustic Tracking of Aircraft Using a Circular Microphone Array Sensor. I Mooradd, David (Red.), Proceedings of the 2010 IEEE International Symposium on Phased Array Systems and Technology. IEEE conference proceedings. ISSN 978-1-4244-5128-9.
• Holm, S; Brungot, John; Ronnekleiv, A; Hoff, Lars; Jahr, Vibeke & Kjølerbakken, Kai Morgan (2007). Acoustic passive integrated transponders for fish tagging and identification. Aquacultural Engineering. ISSN 0144-8609. 36. Vis sammendrag

  The results indicate that it is possible to develop a low-cost system for underwater identification of fish suitable for a high automation level. This could open up for improvements of logistics in for instance the fish fanning industry. (c) 2006 Elsevier B.V. All rights reserved.

• Holm, S; Brungot, J; Rønnekleiv, Arne; Hoff, L; Jahr, V & Kjolerbakken, KM [Vis alle 7 forfattere av denne artikkelen] (2007). Acoustic passive integrated transponders for fish tagging and identification. Aquacultural Engineering. ISSN 0144-8609. 36. doi: 10.1016/j.aquaeng.2006.09.003.
• Hafizovic, Ines; Kjølerbakken, Morgan & Jahr, Vibeke (2007). System configuration for high quality audio capturing in a large microphone array. I Reiss, Josh (Red.), Proceedings of the 31st AES International Conference: New Directions in High Resolution Audio. Audio Engineering Society. ISSN 9781604239805.
• Hoff, Lars; Rønnekleiv, Arne; Brungot, John; Wang, Dag; Bernstein, Ralph & Jahr, Vibeke [Vis alle 8 forfattere av denne artikkelen] (2006). Design of micromachined resonators for fish identification. IEEE International Ultrasonics Symposium Proceedings. ISSN 1051-0117. X(XX), s. 641–644.
• Rønnekleiv, Arne; Brungot, John; Wang, Dag; Bernstein, Ralph; Jahr, Vibeke & Kjølerbakken, Kai Morgan [Vis alle 7 forfattere av denne artikkelen] (2005). Design of Micromachined Resonators for Fish Identification. IEEE International Ultrasonics Symposium Proceedings. ISSN 1051-0117.

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• Brungot, John; Holm, Sverre; Hoff, Lars; Rønnekleiv, Arne; Kjølerbakken, Kai Morgan & Jahr, Vibeke (2004). VivID – patentert metode for merking og identifisering av fisk i vann.
• Lindem, Torfinn; Balk, Helge; Vibeke, J. & Kjølerbakken, K. M. (2002). Measurements of acoustic sound fields in a shallow river. Vis sammendrag

  From earlier experiments, we have seen indications that the sound field from a horizontally aligned transducer in shallow water can differ from the expected field. If this is the case, this phenomenon can have an impact on the measured target strength from fish and on sample volume. Hence, it has been important to verify this by controlled experiments. We have measured the sound field produced by a Simrad ES120-4, 120kHz, 4x10 deg. split beam transducer in a shallow river. These measurements were made with a Reason hydrophone. Reflections from the bottom and surface made modifications to the transmitted pulse. In some positions they could even form separate pulses. These pulses were sufficiently separated in time to produce phantom echoes. Results from this experiment will be presented.

• Kjølerbakken, Morgan & Vallejo, Islen (2015). System design NBV. NILU. ISSN 978-82-425-2771-4. Fulltekst i vitenarkiv Vis sammendrag

  System design for «nasjonalt beregningsverktøy» describing data flow and infrastructure requirements.

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