scholarly journals Design, Implementation and Data Analysis of an Embedded System for Measuring Environmental Quantities

Sensors ◽  
2020 ◽  
Vol 20 (8) ◽  
pp. 2304
Author(s):  
Martin Pieš ◽  
Radovan Hájovský ◽  
Jan Velička
Keyword(s):  
Carbon Dioxide ◽  
Data Analysis ◽  
Relative Humidity ◽  
Embedded System ◽  
Computer Science ◽  
Atmospheric Pressure ◽  
Electrical Engineering ◽  
Carbon Dioxide Concentration ◽  
Ambient Air ◽  
Analysis Data

The article describes the development and implementation of a complex monitoring system for measuring the concentration of carbon dioxide, ambient temperature, relative humidity and atmospheric pressure. The presented system was installed at two locations. The first was in the rooms at the Department of Cybernetics and Biomedical Engineering, Faculty of Electrical Engineering and Computer Science, VŠB-Technical University of Ostrava. The second was in the classrooms of the Grammar School and Secondary School of Electrical Engineering and Computer Science in Frenštát pod Radhoštěm. The article contains a detailed description of the entire measurement network, whose basic component was a device for measuring carbon dioxide concentration, temperature and relative humidity in ambient air and atmospheric pressure via wireless data transmission using IQRF® technology. Measurements were conducted continuously for several months. The data were archived in a database. The article also describes the methods for processing the data with statistical analysis. Carbon dioxide concentration was selected for data analysis. Data were selected from at least two different rooms at each location. The processed results represent the time periods for the given carbon dioxide concentrations. The graphs display in percent how much of the time students or employees spent exposed to safe or dangerous concentrations of carbon dioxide. The collected data were used for the future improvement of air quality in the rooms.

A recording porometer with detachable cups operating on four separate leaves

1962 ◽  
Vol 156 (962) ◽  
pp. 1-13 ◽  
Keyword(s):  
Carbon Dioxide ◽  
Carbon Dioxide Concentration ◽  
Ambient Air ◽  
Short Supply ◽  
Enhanced Sensitivity ◽  
Stomatal Behaviour ◽  
New Instrument ◽  
Leaf Surfaces ◽  
Increased Sensitivity ◽  
Experimental Treatments

A new form of recording resistance porometer is described which enables records of stomatal behaviour to be obtained concurrently from four different leaves; the porometer cups are automatically detached between readings, exposing the leaf surfaces to the ambient air in order to avoid artifacts due to changes in carbon dioxide concentration. The readings are recorded for the four leaves seriatim , the cup for each remaining attached for 3 min out of every ½ h. The results of several of the preliminary experiments carried out to test the new instrument are presented: 1. Continuous records for periods up to 6 days appear to have no serious effect on the functioning of the stomata under normal conditions. With Taraxacum officinale slightly greater stomatal opening was recorded on the fifth day than on the first; for wheat a slight falling off occurred on the third and fourth days, possibly due to ageing of the leaves. 2. The stomata of similar leaves on different plants which have been subjected throughout to the same sequence of conditions show remarkable uniformity of behaviour at any one time; a great increase in the precision of comparisons of experimental treatments should thus be achieved by applying them to such leaves and recording the results concurrently. 3. Experiments with plants of T . officinale , wheat and Xanthium pennsylvanicum subjected to increasing water strain have shown a marked closing response to the process of taking a reading (which involves forcing air through the leaf). This closing response is first seen some time before visible wilting occurs and for X. pennsylvanicum has been shown to be mainly if not entirely due to a greatly increased sensitivity to carbon dioxide. The biological implica­tions of this are discussed. The stomata (e. g. of T. officinale ) may not re-open fully for 2 or 3 days after re-watering, when the plant is recovering from water strain, but the enhanced sensitivity to readings is only shown while water is actually in short supply, and not during the period of recovery.

scholarly journals Effects of Temperature, Relative Humidity, and Carbon Dioxide Concentration on Growth and Glucosinolate Content of Kale Grown in a Plant Factory

Foods ◽  
2021 ◽  
Vol 10 (7) ◽  
pp. 1524
Author(s):  
Milon Chowdhury ◽  
Shafik Kiraga ◽  
Md Nafiul Islam ◽  
Mohammod Ali ◽  
Md Nasim Reza ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Relative Humidity ◽  
Statistical Significance ◽  
Carbon Dioxide Concentration ◽  
Co2 Concentration ◽  
Physical Growth ◽  
Glucosinolate Content ◽  
Growth Stages ◽  
Plant Factory ◽  
Effects Of Temperature

The growth of plants and their glucosinolate content largely depend on the cultivation environment; however, there are limited reports on the optimization of ambient environmental factors for kale grown in plant factories. This study was conducted to investigate the effects of temperature, relative humidity, and the carbon dioxide (CO2) concentration on kale growth and glucosinolate content in different growth stages of cultivation in a plant factory. Kale was grown under different temperatures (14, 17, 20, 23, and 26 °C), relative humidities (45, 55, 65, 75, and 85%), and CO2 concentrations (400, 700, 1000, 1300, and 1600 ppm) in a plant factory. Two and four weeks after transplantation, leaf samples were collected to evaluate the physical growth and glucosinolate contents. The statistical significance of the treatment effects was determined by two-way analysis of variance, and Duncan’s multiple range test was used to compare the means. A correlation matrix was constructed to show possible linear trends among the dependent variables. The observed optimal temperature, relative humidity, and CO2 range for growth (20–23 °C, 85%, and 700–1000 ppm) and total glucosinolate content (14–17 °C, 55–75%, and 1300–1600 ppm) were different. Furthermore, the glucosinolate content in kale decreased with the increase of temperature and relative humidity levels, and increased with the increase of CO2 concentration. Most of the physical growth variables showed strong positive correlations with each other but negative correlations with glucosinolate components. The findings of this study could be used by growers to maintain optimum environmental conditions for the better growth and production of glucosinolate-rich kale leaves in protected cultivation facilities.

scholarly journals Speleoclimate Monitoring to Assess Cave Tourism Capacity in Gelatik Cave, Gunungsewu Geopark, Indonesia

2018 ◽  
Vol 32 (2) ◽  
pp. 181-194 ◽  
Author(s):  
Danardono Danardono ◽  
Eko Bayu Dharma Putra ◽  
Eko Haryono ◽  
Emilya Nurjani ◽  
Muhammad Iqbal Taufiqurahman Sunariya
Keyword(s):  
Carbon Dioxide ◽  
Relative Humidity ◽  
Carrying Capacity ◽  
Main Parameter ◽  
Environmental Changes ◽  
Daily Variation ◽  
Carbon Dioxide Concentration ◽  
Natural Conditions ◽  
Holiday Season ◽  
Cave Management

Increased of the number of visitor at Gelatik Cave is a challenge in terms of cave management. In natural conditions, Caves are vulnerable with environmental changes especially microclimates condition. The change of microclimate inside the cave can destruct cave ornaments.Therefore, it is necessary to calculate the cave carrying capacity with microclimates as the main parameter. This research aims to (1) explore the daily variation of speleoclimate in Gelatik Cave Tourism and (2) analyze the cave tourism capacity in Gelatik Cave. Microclimate parameter that was measured in this research was temperature, relative humidity, and carbon dioxide inside the cave. Measurement of microlimate parameter was carried out automatically for 24 hours during peak season in December 2017 and low season in May 2018. Cave tourism capacity was measured using Lobo method (Lobo, 2015). The results showed that temperature, relative humidity, and carbon dioxide in the Gelatik Cave varry due to tourism activities. The most sensitive parameter is the carbon dioxide concentration inside the cave. The maximum of tourists allowed to visit Gelatik Cave is 76 visitors/ day during holidays and working days. Meanwhile, the maximum time of stay accepted for a particular area inside Gelatik Cave is 17 minutes 10 seconds during weekdays and 12 minutes 53 seconds during the holiday season.

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