Simultaneous Use of Ground Reflection and Lateral Attenuation Noise Models

2021 ◽  
pp. 1-8
Author(s):  
Jeffrey J. Berton
Keyword(s):  
Simultaneous Use ◽  
Noise Models

Коллаж: метод построений и модель города в современной архитектуре// Actual Problems of Applied Sciences Journal World, 6(16), 2019/ Chief Editor Markus Hemmer: Open European Academy of Public Sciences (OEAPS Inc.). 06.07.2019. Barcelona, Spain, 2019. - PP. 21-30.

2019 ◽  
Author(s):  
Ангелина Вадимовна Яшкевич
Keyword(s):  
Applied Sciences ◽  
Chief Editor ◽  
Modern Architecture ◽  
European Academy ◽  
Simultaneous Use ◽  
The City

В данной статье с опорой на тексты ряда исследователей раскрывается, что в современной архитектуре коллаж может использоваться и как метод, и как модель города. Автором выдвинут тезис о том, что одновременное использование коллажа по этим двум направлениям способно связать город и построения зданий в единую умозрительную логику, обеспечивая при этом целостность общего и его частей. In this article, based on the texts of a number of researchers, it is revealed that in Modern architecture a collage can be used both as a method and as a model of a city. The author put forward the thesis that the simultaneous use of a collage in these two areas is able to link the city and the construction of buildings into a single speculative logic, while ensuring the integrity of the general and its parts.

scholarly journals 1/f Noise Modelling and Characterization for CMOS Quanta Image Sensors

Sensors ◽  
2019 ◽  
Vol 19 (24) ◽  
pp. 5459
Author(s):  
Wei Deng ◽  
Eric R. Fossum
Keyword(s):  
Analog Circuits ◽  
Image Sensor ◽  
Image Sensors ◽  
Correlated Double Sampling ◽  
Cmos Image Sensors ◽  
Source Follower ◽  
Cmos Analog Circuits ◽  
Different Origins ◽  
Noise Models ◽  
Fitting Model

This work fits the measured in-pixel source-follower noise in a CMOS Quanta Image Sensor (QIS) prototype chip using physics-based 1/f noise models, rather than the widely-used fitting model for analog designers. This paper discusses the different origins of 1/f noise in QIS devices and includes correlated double sampling (CDS). The modelling results based on the Hooge mobility fluctuation, which uses one adjustable parameter, match the experimental measurements, including the variation in noise from room temperature to –70 °C. This work provides useful information for the implementation of QIS in scientific applications and suggests that even lower read noise is attainable by further cooling and may be applicable to other CMOS analog circuits and CMOS image sensors.

scholarly journals Noise and Breakdown Characterization of SPAD Detectors with Time-Gated Photon-Counting Operation

Sensors ◽  
2021 ◽  
Vol 21 (16) ◽  
pp. 5287
Author(s):  
Hiwa Mahmoudi ◽  
Michael Hofbauer ◽  
Bernhard Goll ◽  
Horst Zimmermann
Keyword(s):  
Breakdown Voltage ◽  
Single Photon ◽  
Photon Counting ◽  
Low Noise ◽  
Dark Count ◽  
Fully Integrated ◽  
Trade Offs ◽  
And Performance ◽  
Noise Models

Being ready-to-detect over a certain portion of time makes the time-gated single-photon avalanche diode (SPAD) an attractive candidate for low-noise photon-counting applications. A careful SPAD noise and performance characterization, however, is critical to avoid time-consuming experimental optimization and redesign iterations for such applications. Here, we present an extensive empirical study of the breakdown voltage, as well as the dark-count and afterpulsing noise mechanisms for a fully integrated time-gated SPAD detector in 0.35-μm CMOS based on experimental data acquired in a dark condition. An “effective” SPAD breakdown voltage is introduced to enable efficient characterization and modeling of the dark-count and afterpulsing probabilities with respect to the excess bias voltage and the gating duration time. The presented breakdown and noise models will allow for accurate modeling and optimization of SPAD-based detector designs, where the SPAD noise can impose severe trade-offs with speed and sensitivity as is shown via an example.

scholarly journals ‘Tracking Together’—Simultaneous Use of Human and Dog Activity Trackers: Protocol for a Factorial, Randomized Controlled Pilot Trial

2021 ◽  
Vol 18 (4) ◽  
pp. 1561
Author(s):  
Wasantha Jayawardene ◽  
Lesa Huber ◽  
Jimmy McDonnell ◽  
Laurel Curran ◽  
Sarah Larson ◽  
...  
Keyword(s):  
Physical Activity ◽  
Controlled Trial ◽  
Pilot Trial ◽  
Activity Level ◽  
Analysis Of Covariance ◽  
Moderate Intensity ◽  
Randomized Controlled ◽  
Activity Trackers ◽  
Dog Owners ◽  
Simultaneous Use

Dog-walkers are more likely to achieve moderate-intensity physical activity. Linking the use of activity trackers with dog-walking may be beneficial both in terms of improving the targeted behavior and increasing the likelihood of sustained use. This manuscript aims to describe the protocol of a pilot study which intends to examine the effects of simultaneous use of activity trackers by humans and their dogs on the physical activity level of humans and dogs. This study uses nonprobability sampling of dog owners of age 25–65 (N = 80) and involves four parallel groups in an observational randomized controlled trial with a 2 × 2 factorial design, based on use of dog or human activity trackers for eight weeks. Each group consists of dog-human duos, in which both, either or none are wearing an activity tracker for eight weeks. At baseline and end, all human subjects wear ActiGraph accelerometers that quantify physical activity for one week. Commercial activity trackers are used for tracking human and dog activity remotely. Additional measures for humans are body composition and self-reported physical activity. Dog owners also report dog’s weight and physical activity using a questionnaire. A factorial analysis of covariance (ANCOVA) is used to compare physical activity across the four groups from baseline to week-10.

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