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Monika Maciejewska

Monika Maciejewska
Wroclaw University of Technology, Wroclaw, Poland · Departament of Environmental Engineering

About

55
Publications
5,283
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479
Citations
Citations since 2017
28 Research Items
296 Citations
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20172018201920202021202220230102030405060
20172018201920202021202220230102030405060
20172018201920202021202220230102030405060

Publications

Publications (55)
Article
Full-text available
A serious factor that limits the environmental applications of drones is the disturbance of the air pollution concentration field by the drone propulsion system. This work presents a gas-sensing drone offering measurements that are unaffected by this phenomenon. The novel development was based on the idea that, during measurements, the sensing devi...
Article
Full-text available
Urban beekeeping has become increasingly popular, despite having different objectives than the large-scale professional/commercial one. Not so much focused on financial profit, urban apiculture provides valuable educational opportunities, promotes the greening of cities, and creates environmental awareness. Many companies and institutions make it a...
Article
Full-text available
Elemental carbon (EC) content in air is considered a proxy for the diesel exhaust impact at workplaces. This paper examines the possibility of estimating EC content in mine air on the basis of measurements of volatile organic compounds (VOC). The measurement study was carried out in an underground metal mine. Gas chromatography with mass spectromet...
Article
Full-text available
Our attention was focused on the identification of activities affecting air quality, which occur in quick-service restaurants (QSR). The work was based on a measurement study of selected kebab stores in the Polish city of Wrocław. It demonstrated that activities taking place in kebabs altered air quality. The associated changes in air parameters su...
Article
Full-text available
The basis of effective beekeeping is the information about the state of the bee colony. A rich source of respective information is beehive air. This source may be explored by applying gas sensing. It allows for classifying bee colony states based on beehive air measurements. In this work, we discussed the essential aspects of beehive air sampling a...
Article
Full-text available
In underground mines, mobile mining equipment is critical for the production system. The microenvironment inside the mobile machine may cause exposure to strongly polluted mine air, which adversely affects the health and working performance of the operator. Harmful pollutants may access the cabin together with the ventilation air delivered from the...
Article
The inappropriate combustion of furniture-industry waste can be a source of serious environmental problems. We proposed a method which is capable to distinguish the emission resulting from the combustion of wood-based materials, the essential component of such waste. The originality of the approach consists in the classification of gas mixtures ins...
Article
Full-text available
Honey bees are subject to a number of stressors. In recent years, there has been a worldwide decline in the population of these insects. Losses raise a serious concern, because bees have an indispensable role in the food supply of humankind. This work is focused on the method of assessment of honey bee colony infestation by Varroa destructor. The a...
Article
Full-text available
Colony Collapse Disorder (CCD) is an environmental threat on a global scale due to the irreplaceable role of bees in crop pollination. Varroa destructor (V.d.), a parasite that attacks honeybee colonies, is one of the primary causes of honey bee population decline and the most serious threat to the beekeeping sector. This work demonstrates the poss...
Article
Full-text available
The study focused on a method of detection for bee colony infestation with the Varroa destructor mite, based on the measurements of the chemical properties of beehive air. The efficient detection of varroosis was demonstrated. This method of detection is based on a semiconductor gas sensor array and classification module. The efficiency of detectio...
Article
Full-text available
The problem of indoor air quality (IAQ) has attracted a great deal of attention recently. One of interesting aspects of this problem is the characterization of human impact on IAQ. This work presents a method which allows to determine the diversity of building occupants influence on indoor air. The method is based on the supervised clustering of th...
Article
Full-text available
This work was focussed on the recognition of the emission of volatile compounds resulting from the combustion of engineered wood products waste. This kind of waste is broadly used for heating purposes in an unauthorised way, giving rise to unorganised emissions. The recognition of such events is very difficult due to the complexity of the produced...
Article
The Western honey bee (Apis mellifera) plays a role in a range of human activities, especially in agriculture. Bee populations need to be maintained in an optimal state. For this reason, early diagnostics of diseases are needed. There are reasons to believe that monitoring of parameters characterizing physical and chemical conditions inside hives m...
Article
Full-text available
Differential mobility spectrometry (DMS) is a promising measurement technique. It is used in the detection of chemical warfare agents, explosives, drugs, and volatile organic compounds. The measurement principle is based on separation of gas-phase ions according to their differential mobility in alternating low and high electric fields. The DMS mea...
Article
Particulate matter (PM) is an important component of air. Nowadays, major attention is payed to fine dust. It has considerable environmental impact, including adverse effect on human health. One of important issues regarding PM is the temporal variation of its concentration. The variation contains information about factors influencing this quantity...
Article
Real thermal preferences of occupants are rarely considered by the automatic control of HVAC systems. It is due to difficulties in describing satisfactory thermal conditions, especially when opinion of many people has to be taken into account. This work presents a method which allows to determine the preferred temperature and the associated relativ...
Article
Full-text available
Formaldehyde is an important indoor air pollutant. It is released mainly from building materials and consumer products. This contaminant has been recognized as having negative effect on humans. Recently, there are developed methods of reducing its emission as well as removal from indoor air. An example of the last approach is the functionalisation...
Article
A need for extensive waste utilization is an adverse effect of developments in the chipboard and wood-based panel production industry. Although the produced waste constitutes a valuable fuel, easily accessible and attractive to individual consumers, domestic furnaces and heat-only boilers do not satisfy thermal waste processing requirements. In par...
Article
Indoor air quality (IAQ) in residential buildings is an issue of increasing importance. IAQ has a serious impact on human wellbeing, performance and health. In order to minimize negative consequences, considerable efforts are made to assure high quality of indoor air. Yet, attention should be payed to the fact that occupants, in particular their ac...
Article
Occupancy receives considerable attention from building designers and managers. In spite of great importance, its determination is still challenging. Traditional methods have various limitations. Therefore, alternative approaches are developed. The goal of this study is a method which provides information about the total number of occupants inside...
Article
Full-text available
Volatile organic compounds are one of the most important group of air pollutants. Potential health and environmental problems resulting from their emission prompted the requirement for monitoring these species. It motivates development of new measurement techniques which are fast, cost effective, reliable and field deployable. One of novel approach...
Article
Full-text available
This work focussed on thermal comfort as the basis to control indoor conditions. Its objective is a method to determine thermal preferences of office occupants. The method is based on detection of thermal events. They occur when indoor conditions are under control of occupants. Thermal events are associated with the use of local heating/cooling sou...
Article
Benzene, toluene, and xylene, called BTX compounds, are broadly distributed in the environment. They frequently co-occur in air, water and soil because of common emission sources. However, these compounds differ considerably in terms of impact, in particular on human health. Due to this fact, measurement techniques are needed, which allow for ident...
Article
Occupancy is one of major factors influencing indoor microclimate. The aim of this work was to determine the influence of this factor on indoor air quality (IAQ) on the basis of CO2 concentration measurements and statistical analysis. We wanted to identify periods of time when IAQ was strongly affected by the occupancy described by the given profil...
Article
Particulate matter (PM) is one of the criteria pollutants which has been determined as harmful to public health and the environment. For this reason the ability to recognize its emission sources is very important. There are a number of measurement methods which allow to characterize PM in terms of concentration, particles size distribution, and che...
Article
In this work, we focus on a transient state of sensor as a source of chemical information. This problem deserves attention for many reasons. As an example, utilization of transient states may allow for faster and more accurate information acquisition. We have considered a transient state gas sensor response to test analyte applied for quantitative...
Article
The continuous time random walk model plays an important role in modeling of so called anomalous diffusion behaviour. One of the specific property of such model are constant time periods visible in trajectory. In the continuous time random walk approach they are realizations of the sequence called waiting times. The main attention of the paper is p...
Conference Paper
These days, the problem of indoor air quality (IAQ) attracts increasing attention. Presently, IAQ is usually characterised on the basis of the following parameters: temperature, relative humidity and carbon dioxide concentration. Because of spatial and temporal variation of these parameters multi-point monitoring systems which operate continuously...
Article
Full-text available
Carbon dioxide is an indicator of indoor air quality. A number of factors influence its concentration. Due to the fact that they all present time variability, CO2 concentration indoors considerably varies over time. In this work we focus on the dynamics of indoor CO2 concentration changes. We examine the dynamics of CO2 variation and use it as a so...
Article
One of the most important problems in studies of building environment is a description of how it is influenced by various dynamically changing factors. In this paper we characterized the joint impact of a collection of factors on indoor air quality (IAQ). We assumed that the influence is reflected in the temporal variability of IAQ parameters and m...
Article
Full-text available
Indoor air quality broadly refers to the environmental characteristics inside buildings and characterizes the physical, chemical and biological state of indoor air at some place and time. Usually it is characterized by physicochemical properties of indoor environment such as temperature, relative humidity, airflows and concentration of characterist...
Article
Full-text available
This work examines the influence of gas sampling method on semiconductor gas sensor response. The problem was investigated with reference to measurements of volatile organic compounds (VOCs) in indoor air, in real conditions. We compared diffusive and dynamic sampling. Based on experimental data, diffusive sampling resulted in smaller and more vari...
Article
The objective of this article is to present a new type of volatile organic compound (VOC) monitoring method based on semiconductor gas sensors. The concept has been developed to account for the continuous measurement difficulties, which result from a sensor memory effect and unpredictable variability of VOC concentration in a monitored environment....
Article
Natural sniffing is an important source of inspiration in gas sensing. Different aspects of this process are exploited in order to attain the functionality of the corresponding technical solutions. We drew our idea from realizing that sniffing actually consists in an induced temporary disturbance of the exposure conditions of olfactory epithelium....
Article
Full-text available
Temperature is one of the main parameters describing thermal comfort and indoor air quality. In this paper we propose an approach, based on a modification of the continuous time random walk, to model the indoor air temperature. We perform a statistical analysis of the recorded time series, that allows us to point out the main statistical properties...
Article
Full-text available
The indoor microclimate is an issue in modern society, where people spend about 90% of their time indoors. Temperature and relative humidity are commonly used for its evaluation. In this context, the two parameters are usually considered as behaving in the same manner, just inversely correlated. This opinion comes from observation of the determinis...
Article
Sensor array exposure conditions were examined in this work regarding their influence on the assessment of volatile organic compounds (VOCs) in air. Measurements were performed using sensor array composed of fifteen TGS sensors. Eight VOCs were considered together with air featured by different humidity levels. It was shown that misclassification r...
Article
Full-text available
Carbon black-filled polymer composites were investigated as sensing materials for organic liquids. Polypropylene and polystyrene which were selected as matrices and various amounts of carbon black were considered as the main factors influencing sensitivity of the composites in view of the percolation theory. Disposable filaments were produced of th...
Article
This paper presents the results of work on a gas sensor system for determining qualitative and quantitative composition of organic solvents. The system performs the analysis of gaseous mixtures, which are obtained by evaporating liquid solvents and therefore directly represent their composition. The system utilizes gas sensor array, which is built...
Article
This work aims at estimating the ability of a sensor system to recognize the type and to determine the concentration of organic compounds emitted from solvents. The measuring system used in the experiment consisted of a sensor array and a unit for data analysis. Commercially available sensors (Figaro, TGS) were used as a basis for the construction...
Article
The responses of a PQQ-GDH entrapped in a polymer structure to mixtures of glucose and maltose were evaluated. Each compound was considered in the concentration range of 0–0.2 mM. Imaging was performed at constant height in the enzymatic feedback mode of scanning electrochemical microscopy (SECM). The enzyme-polymer spot was discretized into 15 × 1...
Article
Indirectly heated electrodes operating in a non-isothermal mode have been used as transducers for reagentless glucose biosensors. Pyrroloquinoline quinone-dependent soluble glucose dehydrogenase (PQQ-sGDH) was entrapped on the electrode surface within a redox hydrogel layer. Localized polymer film precipitation was invoked by electrochemically modu...
Article
Enzyme-polymer layers immobilized on an electrode surface often serve as basis for amperometric biosensors. Caused by the formation process they show spatial variability in the polymer thickness which corresponds to a variability of immobilized enzyme activity. The relationship between topography and localized enzymatic activity of enzyme-polymer s...
Article
Polymer spots with entrapped glucose oxidase were fabricated on glass surfaces and the localized enzymatic response was subsequently visualized using scanning electrochemical microscopy (SECM) in the generator–collector mode. SECM images were obtained under simultaneous variation of the concentration of glucose (0–6 mM) and ascorbic acid (0–200 μM)...
Article
It can be assumed that by integration of many at least partially different sensing elements in a single sensor the gathered information about a measured sample can be significantly increased by recording the readouts of each individual sensing element. Each surface area which is modified with a specific sensing chemistry exhibits spatial inhomogene...
Article
Three volatile organic compounds (VOCs): benzene, toluene and xylene were measured with an array of six Taguchi gas sensors in the air with variable humidity content. The recognition of single compounds was performed, based on measurement results. The principal component analysis (PCA) pointed at humidity as the main classification factor in the me...
Article
Measurements were carried out using the gas sensor array consisting of six TGS. Responses of this device to such alcohols as methanol, ethanol, propanol and butanol were investigated. Water vapour influenced sensor responses to each alcohol. On the basis of experimental results it was possible to establish the discriminative factor. It improved the...

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Project (1)
Project
To develop a method which allows to determine the Occurrence of Malignant Foulbrood and Elevated Levels of Infestation with V. destructor in Honey Bee Colonies, using gas sensor technology