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This paper presents a case of study of a IoT cloud plat-form composed of a microservices architecture that has been developed to integrate the CRITERIA-1D into the ZENTRA cloud. CRITERIA-1D is an open-source agro-hydrological model developed by ARPAE simulating one-dimensional soil water fluxes, crop development, and crop water needs. CRITERIA-1D comes with a default set of crops and soils that can be used or tuned for a specific scenarios. Taking as input the weather forecasts (i.e., temperatures and precipitations), the model can be used to predict the soil water content and soil water potential at different depths. Along with the design of the implemented solution, this paper presents the process of tuning crop and soil parameters for a specific use case. The results show that the tuned model estimates very well with respect to the measures observed by sensors, paving the way to its application within the larger context of the METER's ZENTRA cloud.

We compared the theoretical crop water stress index (CWSI) averaged over late morning hours (10:00-11:00 AM), (CWSImo) and over solar noon hours, midday (1:00-3:00 PM), (CWSImd). We assessed their sensitivity to changes in soil water content including soil water deficit, (SWD, %) and soil matric potential, (SMP, kPa) at different root zone depths, and to stem water potential (Ψstem). At the effective root zone depth, the linear relationship between SWD and CWSI averaged over morning hours resulted in a reasonably good correlation (R2 = 0.52, p

The current computing power and network capabilities of handheld smart devices is helping to drive the development of new sensors, enabling the Internet of things. A chip-based mass spectrometer technology promises to offer a smart-device autonomous microsystem chemical analysis capability for sample determination and process monitoring for multiple applications in a small low-power instrument package. This project focuses on the development of cylindrical ion trap (CIT) mass analyzer chips fabricated using three-dimensional (3-D) additive manufacturing (AM) and planar low temperature cofired ceramic thick film processes for a chip-based mass spectrometer microsystem. The CIT is a mass analyzer composed of planar electrodes and operates by trapping and ejecting sample ions based on their mass in a radiofrequency field. Because of its simplicity, CITs may be easily miniaturized and connected in tandem to achieve multiplexing. AM materials and methods enable enhanced trap miniaturization through micromachining and electrode patterning methods, fast and cost-effective prototyping, batch fabrication, and material formulation flexibility. The current design incorporates three parallel ceramic plate metalized electrodes making up a singular trap geometry in a 10-mm2 ceramic chip, forming a mass analyzer of reduced size, mass, and power, with enhanced material robustness for extended range use and in harsh environments. Unique processes have been developed to produce these devices which include conformal metallization layers, adhesion layers, ceramic paste formulations, sacrificial supporting materials, and cofiring methods. Additionally, 3-D printing brings a unique design and fabrication capability enabling novel structures, material blending, and heterogeneous integration. With true digital control, the designs are easily scalable and shape agnostic.

A chip based mass spectrometer technology promises to offer smart-device autonomous microsystem chemical analysis capability for sample determination and process monitoring for multiple applications in a small low power instrument package. This project focuses on the development of cylindrical ion trap mass analyzer chips fabricated using 3D Additive Manufacturing and planar Low Temperature Co-Fired Ceramic thick film processes toward the realization of a chip based mass spectrometer microsystem. The cylindrical ion trap (CIT) is a mass analyzer comprised of planar electrodes and operates by trapping and ejecting sample ions based on their mass in an RF field. Because of its simplicity CITs may be easily miniaturized and connected in tandem to achieve multiplexing. Additive manufacturing materials and methods enable enhanced trap miniaturization through micro machining and electrode patterning methods, fast and cost effective prototyping, batch fabrication, and material formulation flexibility. The current design incorporates three parallel ceramic plate metalized electrodes making up a singular trap geometry in a 10mm2 ceramic chip, forming a mass analyzer of reduced size, mass, and power, with enhanced material robustness for extended range use and in harsh environments. Unique processes have been developed to produce these devices which include conformal metallization layers, adhesion layers, ceramic paste formulations, sacrificial supporting materials, and co-firing methods. Additionally, 3D printing brings a unique design and fabrication capability enabling novel structures, material blending and heterogeneous integration. With true digital control, the designs are easily scalable and shape agnostic.