Institutt for mikrosystemer: Nye registreringer
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Broadband Vibration-Based Energy Harvesting for Wireless Sensor Applications Using Frequency Upconversion
(Peer reviewed; Journal article, 2023)Silicon-based kinetic energy converters employing variable capacitors, also known as electrostatic vibration energy harvesters, hold promise as power sources for Internet of Things devices. However, for most wireless ... -
Generalized quantum phase spaces for the κ-deformed extended Snyder model
(Peer reviewed; Journal article, 2023)We describe, in an algebraic way, the κ-deformed extended Snyder models, that depend on three parameters β, κ and λ, which in a suitable algebra basis are described by the de Sitter algebras o(1, N). The commutation relations ... -
Computer Vision Based Path Following for Autonomous Unmanned Aerial Systems in Unburied Pipeline Onshore Inspection
(Peer reviewed; Journal article, 2022)Unmanned Aerial Systems (UAS) are becoming more attractive in diverse applications due to their efficiency in performing tasks with a reduced time execution, covering a larger area, and lowering human risks at harmful ... -
Subthreshold Modeling of a Tunable CMOS Schmitt Trigger
(Journal article; Peer reviewed, 2023)In this article, the subthreshold characteristics of a tunable single input CMOS Schmitt trigger (ST) are modeled for the first time. The high-to-low and low-to-high hysteresis transition points are analytically determined ... -
Modelled sonar and target depth distributions for active sonar operations in realistic environments
(Journal article; Peer reviewed, 2022)Target detection performance of mid-frequency active sonars depends heavily on both sonar and target depth. For a given target depth, a sonar performance model may help predict a sonar depth that maximizes the detection ... -
High-resolution polarization-sensitive Fourier ptychography microscopy using a high numerical aperture dome illuminator
(Journal article; Peer reviewed, 2022)Polarization-sensitive Fourier-ptychography microscopy (pFPM) allows for high resolution imaging while maintaining a large field of view, and without mechanical movements of optical-setup components. In contrast to ordinary ... -
Improved resolution Fourier ptychography scheme using oil-filled dome-shaped LED array
(Peer reviewed; Journal article, 2022)Utilising angular-varied illumination in Fourier Ptychography, the resolution of optical microscopes can be increased and the phase of the sample can also be recovered while maintaining a wide field-of-view. In this work, ... -
Fourier ptychography algorithm based on scaled Fourier transform
(Peer reviewed; Journal article, 2021)This letter discusses an alternative Fourier ptychography algorithm based on the scaled fast Fourier transform propagation. The advantage of this scheme is that it enables a zoom-in capability of the object spectrum and ... -
Analysis of a Low Power Inverting CMOS Schmitt Trigger Operating in Weak Inversion
(Peer reviewed; Journal article, 2022)This article analyzes the operation of a low power inverting CMOS Schmitt trigger in weak inversion. The analysis is based on an earlier proposed analytical model, which relates the hysteresis voltages to the transistors' ... -
Joint International Master in Smart Systems Integrated Solutions
(Chapter, 2021)The Joint International Master in Smart Systems Integrated Solutions (SSIs) will graduate candidates for the ever-growing industry of Smart Systems, ubiquitous in all sectors of society including healthcare, transport, ... -
Nano-Power Monostable-Based Wake-Up Mechanism for Wireless Sensor Networks
(Chapter, 2022)Wireless sensor networks (WSNs) generally consist of thousands of sensor nodes, each one supplied by a battery or harvested energy. To prolong the lifetime of wireless sensor networks, wake-up receivers (WuRxs) are typically ... -
Weak Inversion Model of an Inverting CMOS Schmitt Trigger
(Chapter, 2022)In this article the subthreshold characteristics of an inverting single input CMOS Schmitt trigger circuit are analyzed. Analytical expressions for the low-to-high and high-to-low hysteresis transition voltages are determined. ... -
An Ultra-Low Power Multivibrator-Based Wake-up Receiver for Wireless Sensor Networks
(Chapter, 2021)In recent years wireless sensor networks (WSNs) have gained significant attention because of their implementation in many different fields. As the nodes in WSNs are typically battery-powered, their lifetime is mainly limited ... -
Modal analysis of piezoelectrically actuated plates with built-in stress by computationally augmented interferometric experiments
(Peer reviewed; Journal article, 2022)The conventional laser doppler vibrometers for modal analysis of micro-structures are expensive and sometimes inaccessible. In this work, a compact, fiber-based interferometric setup is used to carry out the modal analysis ... -
Quantifying the hydroxyapatite orientation near the ossification front in a piglet femoral condyle using X-ray diffraction tensor tomography
(Peer reviewed; Journal article, 2021)While a detailed knowledge of the hierarchical structure and morphology of the extracellular matrix is considered crucial for understanding the physiological and mechanical properties of bone and cartilage, the orientation ... -
Interspecies and seasonal variations in macroalgae from the Nordic region: Chemical composition and impacts on rumen fermentation and microbiome assembly
(Peer reviewed; Journal article, 2022)Marine macroalgae may serve as sustainable feed resources for ruminant production due to their nutritional attributes, and enteric methane (CH4) mitigating potential. We aimed to characterize the anti-methanogenic properties ... -
Increased Usable Frequency Band for Underwater Transducers with Single Crystal
(Peer reviewed; Journal article, 2020)In the increasing market of transducers for small underwater platforms, each transducer should be used for several purposes, hence cover as large frequency range as possible. Bandwidth is commonly defined as the -3dB limit ... -
Ultrasound Transducers for High Pressure Environments Up to 1000 Bar
(Peer reviewed; Journal article, 2020)This paper studies the influence of high ambient pressure on ultrasound transducers where the piezoelectric layer is bonded to the acoustic matching layer by two different methods: Au-Sn solid-liquid interdiffusion and ... -
Electrical power factor for a single crystal tonpilz versus a plate with matching layers
(Peer reviewed; Journal article, 2021)For underwater transducers mounted on small platforms, reactive electrical power can constitute a main restriction on the usable frequency range. The frequency range in which the amount of reactive power is acceptable can ... -
Impact of High Pressures on Au-Sn Solid Liquid Interdiffusion (SLID) Bonds
(Chapter, 2020)This paper investigates the influence of high pressure on Au-Sn solid-liquid interdiffusion (SLID) bonds formed by bonding Si substrates to dies of either lead-zirconate titanate (PZT) with high surface roughness or Si ...