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Precipitation Processes01:12

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The experimental conditions in a gravimetric analysis should be optimized to maximize the particle size and purity of the obtained precipitate. Ideally, the concentration of the precipitating reagent should be low with effective stirring to maintain low relative supersaturation for the growth of large crystals. In homogeneous precipitation, the precipitant is slowly generated by a chemical reaction in the solution to avoid local reagent excesses. For example, urea decomposes gradually to...
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Precipitation and coprecipitation methods can be used to separate a mixture of ions in a solution. In qualitative inorganic analysis, ions that form sparingly soluble precipitates with the same reagent are separated based on the differences in solubility products. For example, consider the separation of Cu(II) and Fe(II) ions by precipitation as insoluble sulfides. First, copper(II) sulfide is precipitated by the addition of acidic H2S, where the dissociation of H2S is suppressed. Adding H2S...
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Precipitation Gravimetry01:03

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Precipitation gravimetry is based on converting an analyte into a sparingly soluble precipitate, which is separated by filtration and weighed. An ideal precipitate should be pure, insoluble, of known composition, and easily filtered from the reaction mixture.
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Variation of Atmospheric Pressure01:18

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Change in atmospheric pressure with height is particularly interesting. The decrease in atmospheric pressure with increasing altitude is due to the decreasing gravitational force per unit area as we move away from the surface of the earth.
Assuming the air temperature is constant at a given altitude and that the ideal gas law of thermodynamics describes the atmosphere to a good approximation, one can find the variation of atmospheric pressure with height.
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Types of Coprecipitation01:10

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Coprecipitation is the contamination of a precipitate by otherwise soluble species and occurs via different processes. In colloidal precipitates, coprecipitation occurs via surface adsorption. For instance, barium sulfate has a primary layer of adsorbed barium ions and a secondary layer of nitrate counterions. This results in contamination of the precipitate by barium nitrate.
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PortWeather: A Lightweight Onboard Solution for Real-Time Weather Prediction.

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This study introduces a lightweight, on-board system for real-time maritime weather prediction. The innovative solution uses machine learning for accurate wind forecasting without internet, enhancing maritime safety.

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Area of Science:

  • Maritime Meteorology
  • Applied Machine Learning
  • Internet of Things (IoT)

Background:

  • Maritime operations are critically dependent on accurate weather forecasting.
  • Traditional weather prediction methods often lack the real-time, on-site data crucial for maritime safety.
  • Advancements in sensors and machine learning offer new possibilities for on-board weather prediction.

Purpose of the Study:

  • To develop a lightweight, on-board system for real-time weather prediction tailored for maritime applications.
  • To enable reliable, short-range forecasting of key meteorological variables directly on vessels.
  • To create a self-sufficient system that does not require an internet connection for operation.

Main Methods:

  • Integration of a commercial weather station with an industrial IoT-edge data processing module.
  • Implementation of a regression machine learning algorithm optimized for low resource consumption (memory, CPU) on microcontrollers.
  • Development and coding of the algorithm adhering to specific operational constraints for embedded systems.

Main Results:

  • The developed system successfully computes wind direction and speed forecasts on-board.
  • Testing with real-world weather data from static and mobile platforms validated the system's performance.
  • Error metrics confirmed the efficiency and reliability of the proposed lightweight forecasting solution.

Conclusions:

  • The proposed lightweight on-board system provides a viable solution for real-time maritime weather prediction.
  • The system's ability to operate without an internet connection makes it suitable for diverse maritime environments.
  • This advancement has the potential to significantly improve the safety and efficiency of maritime journeys through localized, accurate meteorological forecasts.