Changes In Air Humidity Research Articles

Implementation of the Fuzzy Mamdani Method in Decisions on Light Intensity in Plant Seed Research Rooms

This research is motivated by the assignment requirements of the intelligent systems course. Meanwhile, the title selection was based on the need for automatic regulation of the light intensity of the research lab room. The problem faced is that practitioners cannot regulate the light intensity at all times when there are changes in air temperature and humidity, then during the growth period the seeds must receive sufficient light so that seed growth can be maximized and can be predicted and managed well. This problem can be overcome one way by using the Fuzzy Mamdani method. The fuzzy mamdani method uses 3 variables, namely, input data, data rules, and output. The fuzzy input used in this research is the temperature and humidity values. The fuzzy rules applied are how the input value influences the output that will be produced. The output in this research is the size of the light intensity value. The use of the fuzzy application method is assisted by MATLAB Production Server R2015a 2.1 software. The fuzzy logic in the plant research room was successfully implemented and developed and produced accurate light intensity output, thereby helping practitioners to obtain optimal seeds. In this research, the Fuzzy Mamdani Method was used.

Structural Colored Based Humidity Sensor Consisting of High Resolution 3D Printed Photonic Crystal Coated with Ultrathin Responsive Hydrogels.

Today, humidity sensors have become an integral part of the daily lives. In particular, humidity sensors using an electronic measuring principle have become the standard. Although these sensors have proven to be a stable measurement method, they have some disadvantages, such as their long response time or the danger of using them in explosiveenvironments. This work introduces photonic crystals as an alternative optical measurement approach. The novel technology of ultra-fast two-photon polymerisation printing is combined with a thin-film deposition process, namely iCVD. This allows to print large area high-precision 3D templates, which are subsequently coated with a humidity responsive hydrogel thin film (p(HEMA) of 20nm.The limits of 2PP technology are being pushed allowing the production ofs table and periodic large-area 3D structures. The flexible customization of hydrogels for ambient conditions make them exceptionally promising for a wide range of sensing applications. Additionally, optical methods for measuring humidity seem to be an excellent alternative to overcome the limitations for current state of the art humidity sensors. The optical detection of changes in ambient air humidity is achieved by observing color changes of the printed structure within the visible wavelength range.

Интенсивность нейтронной компоненты космических лучей и влажность воздуха

Neutron monitor data is currently corrected only for the barometric effect. We cannot, however, exclude that changes in air humidity affect the intensity of the cosmic-ray neutron component recorded by neutron monitors. In this regard, we have carried out continuous measurements of air humidity and temperature when observing variations in the cosmic ray intensity with a neutron monitor in Novosibirsk. Analysis of the results of observations of meteorological parameters and cosmic ray intensity in Novosibirsk, as well as data from the global network of neutron monitors, made it possible to identify neutron component intensity variations caused by changes in air humidity. The estimated humidity effect indicates the need to regularly take it into account in the neutron monitor data. To do this, along with atmospheric pressure, regular measurements of humidity and air temperature should be performed.

Intensity of the neutron component of cosmic rays and air humidity

Neutron monitor data is currently corrected only for the barometric effect. We cannot, however, exclude that changes in air humidity affect the intensity of the cosmic-ray neutron component recorded by neutron monitors. In this regard, we have carried out continuous measurements of air humidity and temperature when observing variations in the cosmic ray intensity with a neutron monitor in Novosibirsk. Analysis of the results of observations of meteorological parameters and cosmic ray intensity in Novosibirsk, as well as data from the global network of neutron monitors, made it possible to identify neutron component intensity variations caused by changes in air humidity. The estimated humidity effect indicates the need to regularly take it into account in the neutron monitor data. To do this, along with atmospheric pressure, regular measurements of humidity and air temperature should be performed.

Impact of the Eclipsed Sun on Terrestrial Atmospheric Parameters in Desert Locations: A Comprehensive Overview and Two Events Case Study in Saudi Arabia

This paper is devoted to the analysis of air temperature and humidity changes during the two solar eclipses of 26 December 2019 and 21 June 2020 in Saudi Arabia based on data we collected from two different sites. We highlight the complexity of humidity’s response to a solar eclipse, which is quite different from temperature’s response. During the December event, the Sun rose already partially eclipsed, while for the June eclipse, it was only partial at Riyadh. This difference apparently affected the observed response on the recorded variables: temperature, relative humidity (RH), and vapor pressure (VP) in the two events. Changes in these variables went unnoticed for the first eclipse since they were within the natural variability of the day; yet for the other, they showed evident alterations in the slopes of the major parameters, which we analyze and discuss. A decrease in temperature of 3.2 °C was detected in Riyadh. However, RH and VP showed an oscillation that we explain taking into account a similar effect reported in other eclipses. We measured a time lag of about 15 min from the eclipse central phase in the city. Related fluctuations and dynamics from the computed rates of the temporal variation of temperature and RH are scrutinized. Furthermore, an overdue significant review of terrestrial atmospheric parameters is also offered in the context of the eclipse meteorology, particularly related to desert atmospheres. We also try to identify the influence of solar eclipses in similar environments doing a broad inter-comparison with other observations of these variables in the Near East, northern Africa, and in the United States. These inter-comparisons reveal how complex and dissimilar the response of the lower atmosphere to a solar eclipse can be within a desert environment and other similar environments.

Model of the control object of the mechatronic microclimate system of a medium-sized greenhouse

Sudden changes in air temperature and humidity have a negative impact on crop production. Modern methods of regulating the microclimate of greenhouse facilities are reduced to the simplest one - controlling the flow and temperature of air masses. The aim of this work is to create and test (verify the plausibility) a simplified model of the microclimate of a medium-sized greenhouse. The simplified greenhouse model takes into account the main processes that occur under the influence of external factors (air exchange, mass transfer, moisture transfer, heat transfer), and also takes into account the geometric and spatial characteristics of the object. Each test experiment involves determining the effect of only one parameter at fixed values of all other parameters. A simplified reference model of changes in microclimate parameters (temperature, air velocity and pressure) was developed using Ansys software. Using computer modelling of temperature fields and velocities, an analysis was carried out to determine the possibility of using the model in the control system. The microclimate characteristics were analysed when air pressure, velocity and temperature were stabilised. The results of the study and the developed model are suitable for use in control algorithms for the greenhouse mechatronic system to take into account cyclic daily changes in parameters.

Influence of different treatment conditions on the filtration performance of conventional electret melt blown non-woven and novel nano FFP2 masks.

To allow an efficient protection against viruses like the severe acute respiratory syndrome coronavirus type 2 (SARS-CoV-2), it is important to avoid their spreading by using filtering face pieces (FFP), which are categorized by different standards according to their filtration efficiency. In this study, we subjected six brands of FFP2 standard masks to three different conditions and subsequently analysed them for their filtration performance to evaluate potentials for reusability. The conditions comprised changes of temperature and air humidity, an exposure to isopropyl alcohol (IPA) and an autoclave sterilization. While four of six masks consisted of electrostatically treated melt blown non-wovens, two masks were fabricated using a nanofibrous multilayer system. Due to the absence of prior electrostatic treatment, the nano-masks did not show a significant change in filtration efficiency when discharged by IPA, unlike the melt blown nonwoven masks showing a significant decrease of filtration efficiency down to around 50% at a particle size of 0.3 μm. However, most melt blown masks maintained a sufficient filtration efficiency after all other treatments with even better results than the nanofibrous masks. This was particularly the case for the capacity to filter smallest particles/droplets with a size of around 0.1 μm, which is below the range of typical filtering standards and important for the retention of virally contaminated nano-aerosols or unattached viruses. After temperature/humidity variation and autoclave sterilization, melt blown masks were able to retain a filtration efficiency up to over 90% at 0.1 μm contrary to nano-masks showing a decrease down to around 70%. Based on their better filtration performance, lower price and potential reusability, we conclude that electret melt blown masks are the preferable type of FFP2 masks.

Probabilistic Analysis of Corrosion Rates and Degradation of Weathering Steel Bridges

AbstractCorrosion of weathering steels in outdoor conditions has been observed since their pioneering applications in construction in the 1960s. Changing environmental conditions such as decreasing SO2 concentration and changes in temperature and relative air humidity affect the formation and development of a protective layer of corrosion products on the surface of these steels. The study compares the long‐term corrosion rates of weathering steels according to EN ISO 9224 with the measured rates for various environments in the Czech Republic and abroad, with a focus on sites with high concentrations of chlorides from de‐icing salts. When considering related uncertainties, the corrosion rate models provide estimates in a wide range, and in‐situ measurements can significantly improve corrosion loss predictions. The reliability of bridges made of weathering steels with a well‐developed protective layer is insignificantly affected by corrosion. However, low reliability levels may be experienced in critical details where for example leakage may damage the protective layer of patina.

PATHOGENETIC ASPECTS OF THE INFLUENCE OF SEASONALITY ON THE HEALTH OF PATIENTS WITH CHRONIC PATHOLOGY OF THE CARDIOVASCULAR SYSTEM: LITERATURE REVIEW

Purpose. To summarize and systematize the literature data on the pathogenetic aspects of the influence of seasonality on the health status of patients with chronic pathology of the cardiovascular system.
 Materials and methods. To analyze the literature, materials from the PubMed and PubMed Central resources of the US National Library of Medicine, Google Scholar, Elsevier Clinical Key and Elsevier Science Direct, as well as in the Russian RSCI database were used. The sample consisted of scientific papers devoted to the pathogenetic aspects of the influence of various meteorological factors on the course of cardiovascular pathology.
 Results. The generalized results of clinical and experimental studies presented in this review indicate both direct and indirect effects on the state of the cardiovascular system of seasonal changes in air temperature, atmospheric pressure, solar radiation, air humidity and geomagnetic indicators.
 Conclusion. Meteorological factors have a pronounced effect on the course of cardiovascular diseases both through direct mechanisms of influence, and through the inclusion in the pathogenesis of these diseases and the aggravation of existing risk factors. The pathogenetic mechanisms of the influence of weather factors on the state of the cardiovascular system are important for understanding the application points that can be influenced and improved by primary and secondary prevention of cardiovascular pathology.

Highly Sensitive QCM Humidity Sensor Based on Fullerenol-Assisted Dispersion of Nafion/MWCNTs Composites

Water seepage of building walls is a common problem in our lives. However, the lack of early seepage detection methods often makes the problem worse. To develop effective early wall seepage detection methods, an ultra-sensitive quartz crystal microbalance (QCM) humidity sensor based on fullerenol (C <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">60</sub> -OH)-assisted dispersion of Nafion/multi-walled carbon nanotubes (MWCNTs) composites is proposed. The prepared sensor shows almost 7 times higher frequency shift than pure Nafion-based sensor, which reaches -10814 Hz. This is mainly attributed to the uniform dispersion of MWCNTs in the Nafion with the assistance of C <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">60</sub> -OH to form a reticular structure that generates more voids, which greatly improves the diffusion ability of water molecules in the composite materials and thus further enhances humidity sensing properties of the sensor. The high-performance QCM humidity sensor is expected to be used for early detection of water seepage in building walls by monitoring air humidity changes near the wall surface.

Influence of Mixed Conifer Forest Thinning and Prescribed Fire on Soil Temperature and Moisture Dynamics in Proximity to Forest Logs: A Case Study in New Mexico, USA

Forest management activities often include fuels reduction through mechanized thinning followed by prescribed fire to remove slash. Management prescriptions may include the retention of logs for wildlife habitat and microsites for enhanced tree regeneration. We examined aboveground microclimate and belowground soil temperature and volumetric water content (VWC) dynamics beneath and adjacent to logs at 10, 20, and 30 cm depths in a mixed conifer forest. We assessed the soil variables over 7 years during pre-treatment, post-thinning, and post-fire using a Before–After/Control–Impact experimental design. We found that thinning and burning caused large increases in solar radiation and mean and maximum wind speeds, but only small changes in air temperature and humidity. The treatments increased the soil temperatures beneath the logs by up to 2.7 °C during spring, summer, and fall; the soil VWC increased from 0.05 to 0.08 m3/m3 year-round at 20 and 30 cm depths. Microsites 1–2 m away from the logs also showed soil temperature increases of up to 3.6 °C in spring, summer, and fall, while the measurements of the soil VWC produced variable results (moderate increases and decreases). The increased VWC in late winter/spring likely resulted from reduced plant transpiration and greater snow amounts reaching the ground without being intercepted by the forest canopy. Log retention on thinned and burned sites provided microsites with increased soil temperature and moisture in the top 30 cm, which can enhance soil ecosystem processes and provide refugia for invertebrate and vertebrate wildlife.

INNOVATIVE METHOD FOR STUDYING THE DYNAMICS OF POLLUTION AND HUMIDITY CHANGES IN SPORTS FACILITIES: FITNESS ROOMS AND SWIMMING POOLS

It is necessary to take into account the reaction time of the system to changes and provide for changes in parameters when using modern automation systems and indoor microclimate control with a dynamic change in the intake of harmful substances. The change in carbon dioxide (CO2) pollution and air humidity in sports facilities, such as fitness rooms and swimming pools, is a non-stationary random process with a complex type of non-stationarity and can be described by statistical characteristics. Obtaining these statistical characteristics is complicated by the probabilistic nature of the whole process and the presence of random systematic errors in measuring pollution (CO2) and air humidity of a particular sports facility, the specifics of the functioning of heat and mass transfer processes, moisture exchange in the premises of sports facilities (swimming pools, fitness halls, gyms, etc.). etc.) and has not been studied in modern scientific literature. Therefore, this study was carried out precisely in order to improve the situation and bring it out of the impasse (uncertainty) regarding sports facilities and premises for mass physical culture, recreation, and leisure. The paper proposes a comprehensive method for studying the dynamics of changes in pollution (CO2) and air humidity in a sports facility (fitness rooms, swimming pools, etc.). It allows you to determine the statistical characteristics of the process and identify it with an accuracy that is satisfactory for practical purposes (the error is no more than 10%). In the process of research, it is necessary to use daily diagrams of the operation of CO2 air pollution meters and moisture meters in fitness rooms and swimming pools for a long period of time (70 days). An optimal flow meter of air pollution with carbon dioxide (CO2) or a moisture meter should be built according to a discrete circuit with digital processing of information that comes from a sensor (an artificial intelligence system for controlling air gas exchange processes in a sports facility), according to an algorithm for determining a moving average over a period of 10 ... 20 minutes averaging of the signal and the interval for issuing results 2 ... 5 min. This is what will make it possible to reduce random measurement errors and ensure accurate reproduction of the dynamics of the processes of changing Ac(t) or Wp(t) (which, by the way, can be quite fleeting).

The increase in the proportion of impervious surfaces and changes in air temperature, relative humidity, and cloud cover in Poland

The aim of the study is to characterise the changes in the proportion of impervious surfaces (ISs) in Poland and their impact on changes in temperature, air humidity, and cloud cover. The results of satellite image classification from 1990, 2000, 2010 and 2020, as well as meteorological data from the period 1981–2020 for the warm half of the year, were used. An analysis was performed making it possible to compare the changes in the proportion of ISs in 3 decades, i.e. 1991–2000, 2001–2010 and 2011–2020. In Poland, in the years 1991–2020, the total area of ISs increased by approxi- mately 30%. At the same time, statistically significant positive trends in maximum temperature are visible throughout Poland, ranging from 0.48°C per 10 years to &gt;0.90°C per 10 years. Trends in the magnitude of low-level cloud cover are negative throughout Poland and range from −2.7% to −2.3% per 10 years. The frequency of stratiform clouds is decreasing, while that of mid-level Cirrus and Cumulus clouds is increasing. The results show a relationship between the increase in ISs in Polish cities and changes in meteorological elements in their area and in the immediate vicinity, which were most pronounced in the first decade of the 21st century.

Влияние снижения относительной влажности воздуха в период выращивания бройлеров на показатели иммунитета и продуктивности

Abstract. An unsatisfactory microclimate in poultry premises contributes to damage in the form of a decrease in the average daily gain of broilers by 10 %. Purpose of research is to study the effect of relative humidity at the same temperature regime on the immunity and productivity of broilers of the Ross-308. Research methods. The experiment was carried out on broiler chickens of the cross Ross-308 up to 35 days of age. In group II, period 0–1 days of growing broilers, the relative humidity indicators were less than the lower limit of the norm by 10 %, in periods 5–7, 11–16, 20–22 and 26–35 days, the relative humidity indicators were less than the lower limit of the norm by 5 %. In group I, all indicators were recommended as recommended. The bactericidal activity of blood serum was determined by the method of I. M. Karput, lysozyme activity was determined by the nephelometric method according to V. G. Dorofeychuk. Results. As a result of the study, it was found that a decrease in the change in relative air humidity had a negative effect on immunity: the bactericidal and lysozyme activity of blood serum decreased. So, on the 21st day, the indicator of bactericidal activity of blood serum of broiler chickens in group II was lower by 14.2 % (P ≤ 0.05) compared to group I. At 3 weeks of age, the lysozyme activity of the blood serum of chickens of group II was lower by 14.3 % (P ≤ 0.05) compared to the control group. The productivity of birds also decreased to 13.70 % in relation to the control. Scientific novelty. For the first time, we have shown that a decrease in the indicators of relative air humidity at the content of Ross-308 cross broilers during the period of 0–1 days of cultivation by 10 % relative to the lower limit of the norm, during the periods of 5–7, 11–16, 20–22 and 26–35 days – by 5 %, subject to the recommended temperature parameters, has a negative effect on immunity.

Zmiany wilgotności powietrza w Łodzi w latach 1966–2020 w świetle wybranych wskaźników

The aim of the study is to present changes in air humidity in central Poland in the years 1966–2000 in Łódź as an example. The values of air temperature, relative humidity and atmospheric pressure from four observation terms, 00, 06, 12 and 18 UTC, were used. On this basis, the saturated vapour pressure, the current vapour pressure, and the saturation deficit were calculated. Then, the variability of these three indicators and relative humidity was examined. The variability of monthly and seasonal average values of humidity indices in four observation periods was presented, the trends in seasonal variability of humidity indices were calculated and the distribution functions of their distributions were compared in the midday period in three 15-year periods: 1966–1980, 1986–2000 and 2006–2020. It has been shown that the pressure of saturated water vapour is the highest in summer, the lowest in winter, and slightly higher in spring than in autumn at all times, except for the night. It increased significantly in the studied period as a result of the increase in air temperature. A comparison of the distributions in three 15-year periods shows a significant increase in the probability of occurrence of high values of saturation vapour pressure, even above 30hPa. The water vapour pressure in the air is highest in summer and lowest in winter, but in spring it is lower than in autumn. All trend coefficients are positive, but only less than half are statistically significant. A comparison of the distributions over three 15-year periods show a slight increase in the probability of higher values of the actual vapour pressure. The saturation deficit, as the difference between the previous two indicators, increases significantly. Its value in spring is significantly higher than in autumn. The trend is positive, especially in spring and summer, and the comparison of distributions shows that in the last 15 years the probability of high values of saturation deficit increased significantly. The course of relative humidity is the opposite of saturation deficit. In autumn, the relative humidity is definitely higher than in spring. The trend is down. To sum up, warming brings an increase in the capacity of the atmosphere for water vapour, a slight increase in the amount of water vapour in the air, but also a significant increase in saturation deficit and a decrease in relative humidity, which is particularly strong in spring in the first half of the growing season.

Behavioural hydroregulation protects against acute effects of drought in a dry-skinned ectotherm.

During extreme climate events, behavioural thermoregulation may buffer ectotherms from thermal stress and overheating. However, heatwaves are also combined with dry spells and limited water availability, and how much individuals can behaviourally mitigate dehydration risks through microclimate selection remains largely unknown. Herein, we investigated the behavioural and physiological responses to changes in air and microhabitat humidity in a terrestrial ectotherm, the asp viper (Vipera aspis). We exposed individuals to a simulated heatwave together with water deprivation for 3weeks, and manipulated air water vapour density (wet air vs. dry air) and microclimate (wet shelter vs. dry shelter) in a two-by-two factorial design. Dry air conditions led to substantial physiological dehydration and muscle wasting. Vipers exposed to dry air usedmore often a shelter thatoffered a moist microclimate, which reduced dehydration and muscle wasting at the individual level. These results provide the first experimental evidence that active behavioural hydroregulation can mitigate specific physiological stress responses caused by a dry spell in an ectotherm. Future studies investigating organismal responses to climate change should consider moisture gradient in the habitat and integrate both hydroregulation and thermoregulation behaviours.

Study on heat and mass transfer distance of water-film evaporation in limited space using dual-wavelength digital holographic interference

To study the heat and mass transfer between evaporating water film and air in limited space, the temperature and humidity distributions of air near the flowing water film were measured using dual-wavelength digital holographic interference (DHI). The holograms were recorded by CMOS with two different wavelengths of 532 nm and 671 nm. We derived the relationships between the phase changes reconstructed from the holograms and the air temperature and humidity changes based on the Edlen formulas. A water film evaporation (WFE) model was built to generate steady water film and demonstrate the heat and mass transfer in air countercurrent to the water film, which flows down on the copper plate. The model has two symmetrical tunnels isolated by a copper plate in the middle, allowing to compare the cases of heat and mass transfer with and without evaporation. The measurement precision is checked by comparing the reconstructed results with the sensor measured values and by calculations of heat balance and dimensionless Nusselt and Sherwood numbers. Based on the measurement results, the concept of feature transfer distance (FTD), is proposed, which characterizes the intensity of heat and mass transfer. By analyzing FTD, the main influencing factors of heat and mass transfer were obtained.

Community Structure of Epilithic Moss Mites and Their Response to Environmental Factors in Different Grades of Rocky Desertification Habitats

This research has been undertaken to reveal the changes in the community structure of epilithic moss mites and the response of these mites to environmental factors under different grades of rocky desertification environment. In this study, epilithic moss mites were collected in a demonstration area for rocky desertification management in Bijie Salaxi, with the following rocky desertification grades as habitat gradients: without rocky desertification, potential rocky desertification, light rocky desertification, moderate rocky desertification, and severe rocky desertification. The differences in the number of individuals, taxa, diversity index, dominance index, richness index, evenness index, and the effects of environmental factors on moss mite communities were revealed by one-way ANOVA, correlation analysis, and redundancy analysis for different grades of these mites. The results show that a total of 11,563 epilithic moss mites were captured in the study area, belonging to three orders, 100 families, and 171 genera, with Nanorchestes and Trichogalumna as the dominant taxa. With the deepening of rocky desertification, the dominant number of Nanorchestes and Trichogalumna increased. Still, the percentage of very rare genera also decreased, and there were differences in the composition of the dominant genus taxa in different grades of rocky desertification. Different grades of rocky desertification habitats had significant effects on the diversity index and richness index of moss mite species but not on the number of taxa, individuals, dominance index, and evenness index. The overall epilithic moss mite communities in different habitats were moderately dissimilar. Air temperature and rock temperature had strong effects on each index of moss mite diversity, whereas light factors and air humidity had a weak impact on these indices. Amongst the communities, those of Scheloribates are more sensitive to rock temperature variation, while Blattisocius, Ledermuelleria and Camerobia correlate more with a light variation. Parholaspulus, Blattisocius, Camerobia, Haplochthonius, Gymnodamaeus, etc. were more sensitive to changes in air humidity. The research shows that there are differences in moss mite community structure under different rocky desertification grades, rocky desertification has caused some effects on moss mite community structure, and the use of mite dominant taxa genera can give preliminary indications of the rocky desertification environment; meanwhile, there is a specific correlation between mite taxa and habitat environment changes.

Influence of air humidity on the survival rate, lifetime, and development of Ixodes ricinus (L., 1758) and Ixodes persulcatus Schulze, 1930 (Acari: Ixodidae)

In a laboratory experiment, the influence of air humidity on ticks of known calendar age was investigated. In desiccators at different humidities (44%, 55%, 70%, 84%, and 98%), we studied changes in the life span and development of eggs, hungry and fed larvae, nymphs, and adult ticks Ixodes persulcatus and I. ricinus. It was found that changes in air humidity at temperatures comfortable for ticks determine the lifetime of hungry ticks waiting for the host, the possibility of molting at the next stages, and the preservation of egg clutches. 84–98% humidity is ideal for the survival of hungry and fed larvae, nymphs, adult ticks, and egg clutches. A decrease in humidity to 70% for a month leads to a significant population reduction. Humidity of 40–55% is fatal for I. persulcatus after 10–15 days. At 40–55% air humidity, an insignificant part of the populations of I. ricinus survives for up to 1 month with a complete death of clutches.

Humidity sensing properties and respiratory behavior detection based on chitosan-halloysite nanotubes film coated QCM sensor combined with support vector machine

This work demonstrated an accurate and reliable quartz crystal microbalance (QCM) humidity sensor based on the chitosan-halloysite nanotubes (CS-HNTs) composite that can be used to monitor respiration lines. The hydrophilic polymer chitosan (CS) with halloysite nanotubes (HNTs) was characterized using SEM, TEM, XRD, XPS, FT-IR, and WCA investigations to analyze the microscopic morphology, molecular structure, chemical bond, and hydrophilicity. The experimental results showed that the QCM humidity sensor of CS-HNTs film demonstrated high sensitivity (69.1 Hz/% RH), superior humidity hysteresis (<2.8% RH), excellent long-term stability, repeatability, and outstanding selectivity. The subtle changes in fingertip movements and exhaled air humidity in different modes were detected by the QCM humidity sensor. A respiratory behavior monitoring model based on support vector machines was constructed to accurately determine five breathing modes and apply it to human breath detection and health medical diagnosis.