MEMS Microgravity Measurement Module with Nano-g/Hz Noise Floor for Spaceborne Higher-Level Microgravity Scientific Experiment Applications

Author(s):  
Qiu Wang ◽  
Zongfeng Li ◽  
Huafeng Liu ◽  
Qiangwei Xu ◽  
Shitao Yan ◽  
...  
2020 ◽  
Vol 11 (1) ◽  
pp. 209-215
Author(s):  
Greta Stoyanova ◽  

The sudden shift to distance learning caused by the COVID-19 virus emergency has posed a serious challenge to schools. This article presents a successful model for applying the STEM approach in science education at the Alexander Georgiev-Kodzhakafaliyata Primary School in Burgas. In the conditions of synchronous distance learning in MS Teams environment, students conduct experiments with handy tools and materials at home, during online classes or as homework assignments, then describe the experiments in presentations and share them with their classmates during the project week ( April holidays and at the end of the year). The application of STEM home laboratory combines knowledge from different disciplines, diversifies and facilitates learning, enables learning by doing things, which most stimulates the curiosity of students. Thus, they casually acquire skills for planning and conducting a scientific experiment, generating hypotheses and reasoning, measuring results and formulating conclusions. At the same time, soft skills for teamwork, creative and critical thinking, presentation skills are formed and upgraded.


Author(s):  
Thea Turkington

Landslides and flash floods result in many fatalities around the globe. Understanding what triggers these events is therefore vital, although how to approach this problem is not straight forward. After background information for the experiment and some guidelines, two options are presented to learn more about the triggers of debris flows: (A) using rainfall or (B) the atmospheric conditions. You can then choose the option that appears more useful and interesting to you (you can always go back and read the other experiment afterwards). The article then ends with a reflection on the results.


2021 ◽  
Vol 64 (3) ◽  
pp. 117-125
Author(s):  
Rajalakshmi Nandakumar ◽  
Vikram Iyer ◽  
Shyamnath Gollakota

The vision of tracking small IoT devices runs into the reality of localization technologies---today it is difficult to continuously track objects through walls in homes and warehouses on a coin cell battery. Although Wi-Fi and ultra-wideband radios can provide tracking through walls, they do not last more than a month on small coin and button cell batteries because they consume tens of milliwatts of power. We present the first localization system that consumes microwatts of power at a mobile device and can be localized across multiple rooms in settings such as homes and hospitals. To this end, we introduce a multiband backscatter prototype that operates across 900 MHz, 2.4 GHz, and 5 GHz and can extract the backscatter phase information from signals that are below the noise floor. We build subcentimeter-sized prototypes that consume 93 μW and could last five to ten years on button cell batteries. We achieved ranges of up to 60 m away from the AP and accuracies of 2, 12, 50, and 145 cm at 1, 5, 30, and 60 m, respectively. To demonstrate the potential of our design, we deploy it in two real-world scenarios: five homes in a metropolitan area and the surgery wing of a hospital in patient pre-op and post-op rooms as well as storage facilities.


2011 ◽  
Vol 94 (11) ◽  
pp. 3738-3741 ◽  
Author(s):  
Menghui Li ◽  
David Berry ◽  
Jaydip Das ◽  
David Gray ◽  
Jiefang Li ◽  
...  

2015 ◽  
Vol 64 (10) ◽  
pp. 2759-2768 ◽  
Author(s):  
Jose A. Gazquez Parra ◽  
Manuel Fernandez Ros ◽  
Nuria Novas Castellano ◽  
Rosa M. Garcia Salvador

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