Zobrazeno 1 - 10
of 20
pro vyhledávání: '"Ralph Otto"'
Handheld measurement device for field-effect sensor structures: Practical evaluation and limitations
Autor:
Hans Josef Ackermann, Arshak Poghossian, Michael J. Schöning, Stefan Beging, Rob J. Maris, Ralph Otto, Torsten Wagner
Publikováno v:
Sensors and Actuators B: Chemical. 127:217-223
A user-friendly handheld measurement device in combination with a field-effect-based capacitive electrolyte–insulator–semiconductor (EIS) sensor has been developed. The measurement device allows the characterisation of various chemical sensors an
Publikováno v:
Sensors and Actuators B: Chemical. 117:472-479
A miniaturised 16-channel LAPS device together with a control and measurement software was developed. The sensor chip, the IR-LED array and the electronic unit are accommodated in a small cylinder, which can be directly filled with the solution to be
Publikováno v:
Sensors and Actuators B: Chemical. 108:808-814
The light-addressable potentiometric sensor (LAPS) is a field effect-based sensor, which allows due to its simple structure a wide range of possible applications. The aim of this work is the design of a portable miniaturised 16-channel LAPS with a si
Autor:
Michael J. Schöning, Yu. Mourzina, K. Furuichi, Ralph Otto, Tatsuo Yoshinobu, Yu. E. Ermolenko, Hiroshi Iwasaki
Publikováno v:
Sensors and Actuators B: Chemical. 95:352-356
A novel design of the light-addressable potentiometric sensor (LAPS) for realisation of a portable multisensor device is presented. Light sources and electronics including an oscillator, a multiplexer, a pre-amplifier and a high-pass filter are encap
Publikováno v:
Physica C: Superconductivity. 368:181-184
The in-phase current noise of the two junctions leads to additional 1/f noise in dc SQUIDs, which is reduced by the well-known bias reversal technique (ac bias reversal). In this paper, a new idea for dc SQUID operation with ac bias reversal non-cons
Autor:
Ralph Otto, X.H. Zeng, K. Barthels, M.J. Faley, N. Wolters, Alex I. Braginski, D.F. He, Yi Zhang, H. R. Yi, Hans-Joachim Krause
Publikováno v:
IEEE Transactions on Appiled Superconductivity. 9:3813-3816
We have developed a radio frequency bias current scheme with reversal frequency up to 50 MHz for dc superconducting quantum interference devices (SQUIDs). The SQUID and the readout electronics, were connected via a quarter wavelength (/spl lambda//4)
Autor:
G. Ockenfuss, Jürgen Schubert, P. David, Willi Zander, J. Borgmann, Alex I. Braginski, Ralph Otto
Publikováno v:
Review of Scientific Instruments. 68:2730-2734
This article will discuss improved electronically formed gradiometers based on high-temperature radio frequency (rf) superconducting quantum interference device (SQUID) magnetometers. For gradiometer balancing, a system of adjustable superconducting
Publikováno v:
Review of Scientific Instruments. 68:3082-3084
We have tested two methods of compensating environmental disturbances applicable to high-temperature superconducting quantum interference device (SQUID) systems operating in magnetically unshielded environments. For testing, we used first- and second
Publikováno v:
The 13th International Conference on Solid-State Sensors, Actuators and Microsystems, 2005. Digest of Technical Papers. TRANSDUCERS '05..
A miniaturised 16-channel LAPS device together with a control and measurement software was developed. The sensor chip, the IR-LED array and the electronic unit are accommodated in a small cylinder, which can be directly filled with the solution to be
Autor:
Mueller, Ralph Otto
In the field of counseling the thinking-feeling-acting (T-F-A) trichotomy provides several advantages over conventional approaches to select counseling methods. Hutchins developed the TFA system and a corresponding instrument, the Hutchins Behavior I
Externí odkaz:
http://hdl.handle.net/10919/49863