Painted Areas Research Articles

VOC emission rates from an indoor surface using a flux chamber and PTR-MS

Arising from the Chemical Assessment of Surfaces and Air (CASA) 2022 study at the National Institute of Standards and Technology (NIST) Net-Zero Energy Residential Test Facility (NZERTF), this paper presents the first evaluation of indoor surface emissions to a house measured with a surface flux chamber coupled to an online, non-targeted volatile organic compound (VOC) mass spectrometric detection. These surface emissions are compared to those assessed using ambient, whole house indoor VOC measurements and the outdoor air change rate. Chamber emission rates varied by almost four orders of magnitude across 35 quantified VOCs. The whole house emissions measured by campaign-long ambient measurements and the flux chamber emissions (when scaled to the painted surface area of the house) are similar, with an average ratio between the two of 1.3 ± 1.0. The general agreement between these two approaches indicates that the flux chamber was not solely measuring primary emissions from building materials located below the chamber. Rather, the results suggest that over the 12-year house lifetime, VOCs have been widely distributed around the house, migrating from their primary sources to secondary surface reservoirs. With the house in a quasi-steady state, the thermodynamic activities (i.e., the vapor pressures) of the VOCs within the different reservoirs become similar. Emissions of aromatics and monoterpenes have declined since the house was built, whereas aldehyde emissions have remained relatively constant.

Determination of volatile organic compounds (VOCs) in indoor work environments by solid phase microextraction-gas chromatography-mass spectrometry

Volatile organic compounds (VOCs) are continuously emitted into the atmosphere from natural and anthropogenic sources and rapidly spread from the atmosphere to different environments. A large group of VOCs has been included in the class of air pollutants; therefore, their determination and monitoring using reliable and sensitive analytical methods represents a key aspect of health risk assessment. In this work, an untargeted approach is proposed for the evaluation of the exposure to volatile organic compounds of workers in an engine manufacturing plant by GC–MS measurements, coupled with solid-phase microextraction (SPME). The analytical procedure was optimized in terms of SPME fiber, adsorption time, desorption time, and temperature gradient of the chromatographic run. For the microextraction of VOCs, the SPME fibers were exposed to the air in two different zones of the manufacturing factory, i.e., in the mixing painting chamber and the engine painting area. Moreover, the sampling was carried out with the painting system active and running (system on) and with the painting system switched off (system off). Overall, 212 compounds were identified, but only 17 were always present in both zones (mixing painting chamber and engine painting area), regardless of system conditions (on or off). Finally, a semi-quantitative evaluation was performed considering the peak area value of the potentially most toxic compounds by multivariate data analyses.

Disclosure of a Concealed Michelangelo-Inspired Depiction in a 16th-Century Painting.

Some paintings may have hidden depictions beneath the visible surface, which can provide valuable insights into the artist's creative process and the genesis of the artwork. Studies have shown that these covered paintings can be revealed through image-based techniques and integrated data processing. This study analyzes an oil painting by Beceri from the mid-16th century depicting the Holy Family, owned by the Uffizi Galleries. During the analysis of the materials, we discovered evidence of pictorial layers beneath the visible scene. To uncover the hidden figuration, we applied a multimodal approach that included microprofilometry, reflectance imaging spectroscopy, macro X-ray fluorescence, and optical coherence tomography. We analyzed the brushstrokes of the hidden painting, visualized the underdrawing, located the painted areas beneath the outermost painting, and quantified the thicknesses of the pictorial layers. The pigments used for the underpainting were identified through cross-analysis of X-ray fluorescence and spectral correlation maps. The underlying pictorial subject, Leda and the Swan, appears to be inspired by a long-lost and replicated work by Michelangelo. This information places Beceri and his production in a more defined context.

Identifikasi Bahaya Proses Blasting dan Painting di Perusahaan Fabrikasi Menggunakan Job Hazard Analysis (JHA)

The risk of accidents and occupational diseases is difficult to avoid, one of which is in fabrication companies because workers are in direct contact with objects and heavy equipment during work. One of the work areas that is at high risk of accidents and occupational diseases is the blasting and painting area. The objectives of this study are: (1) to identify potential hazards and possible risks (2) to control the risks of each process activity to ensure that the work is in a safe condition. The research method used is a qualitative descriptive approach method with risk analysis using job hazard analysis. The results of the study identified 52 potential hazards and risks with 9 types of hazards, namely psychological hazards, mechanical hazards, electrical hazards, fire hazards, blasting hazards, physical hazards, chemical hazards, biological hazards, and ergonomic hazards derived from 7 classifications of processes or work stages in the blasting and painting work area. Prevention and control efforts are carried out to reduce the risk as a whole by using a hierarchy of control.

Estimating positional plus-minus in the NBA

Abstract Plus-minus is a widely used performance metric in sports. Players with high plus-minus ratings are often considered more efficient than others. While numerous plus-minus models have emerged since the introduction of adjusted plus-minus in 2004, most of these metrics focus on evaluating player performance at the individual level. In the present study, we follow the plus-minus framework and adopt a hierarchical Bayesian linear model to estimate plus-minus at the position level in the NBA from 2015–16 to 2021–22. Results show that players with versatile offensive skills and big players who defend the paint area are the most valuable offensive and defensive contributors respectively. We also find that the gaps in offensive plus-minus between offensive position groups have decreased over time. Overall, our analysis offers valuable information regarding average positional values in the NBA, allowing more objective player comparisons within position groups. We also show improved prediction accuracy in player plus-minus when factoring in player positions.

Factors influencing Agrobacterium-mediated genetic transformation efficiency in bread wheat (Triticum aestivum L.)

Assessment of the efficiency of Agrobacterium tumefaciens mediated transformation in four bread wheat varieties was focused and upon optimization of experiments done to obtain tangible results. The four varieties, Fielder, Navojoa, Baj and Kachu/saul, were transformed with optimized protocols and randomly selected from a selection medium amalgamated with phosphinothricin (Glufosinate). Initially, the variety Fielder has proceeded with 36 different concentrations of synthetic auxins 2,4-D and picloram as 36 treatments. The treatment 30 (48 μg of 2,4-D and 64 μg of picloram) has shown higher efficiency and is comparable in terms of the three traits studied. Additionally, antioxidants and growth regulators were adjusted to obtain better results towards reasonable transformation frequency. Additional varieties were also tested and selected against the selectable marker PPT based on the optimization for the variety Fielder. Selected genotypes were subjected for gusA or Bar gene PCR amplification. The result revealed the frequency of transgenesis in the range of 60 to 70% with the varieties studied. However, the whole experiment needs further repetitions for confirmatory results. Transgenic genotypes of the Fielder variety showed moderate to strong GUS expression in leaves, anthers, seeds, seed coats, and roots compared to non-transgenic control plant tissues. PPT leaf painting assay showed the lack of necrosis on the painted area of leaves in transgenic genotypes compared to the non-transgenic ones.

Correlation of Visible Reflectance Spectrometry and Portable Raman Data for Red Pigment Identification

The accurate identification of pigments is of principal relevance in the field of cultural heritage conservation and restoration practices. In this preliminary study, a first attempt to set up a procedure for accurate red pigment identification, based on the assessment of the correlations existing between visible reflectance spectrometry (vis-RS) and Raman data, is presented. The proposed approach involved the realization of a library consisting of data acquired on a set of 35 pure red historical pigments supplied by ©Kremer Pigmente. In particular, vis-RS data, collected through a Konica Minolta CM-2600d spectrophotometer, were registered, together with the position of the Extrema Points (E.P.s) encompassing both the maximum and minimum points of the first derivative of the % spectral reflectance factor (SRF%) curves. Portable Raman spectroscopy measurements were collected by a B&W Tek Inc. portable Raman spectrometer equipped with a 785 nm laser. For each tested pigment, the positions and relative intensities of the characteristic Raman peaks were considered. The library was then tested for the characterization of the red/reddish painted areas of the medieval wall painting located within The Norman Castle of Aci Castello (Catania, Italy), and was shown to be essential for the unambiguous identification of the pigment used. It is worth noting that this study represents the first novel attempt to establish a reliable and efficient methodology for pigment identification, offering promising prospects in reducing uncertainties and ambiguities arising from the application of a single stand-alone approach.

긍재(兢齋) 김득신(金得臣, 1754-1822)의 산수화 연구

Geungjae (兢齋) Kim Deuk-shin (金得臣, 1754-1822) is known as one of the three genre painters along with Kim Hong-do (金弘道, 1745-1806?) and Shin Yun-bok (申潤福, 1758-1817 afterwards) or only as a painter who had been largely influenced by Kim Hong-do. In fact, he was a 44-year veteran Dohwaseo painter who had participated in important national art projects. Aside from his famous genre paintings, his extraordinary talent in portraits, landscapes, birds and animals, and flowers and animals established him as one of the best painters during the period. Especially, his results in Nokchwijae (祿取才: the state examination for court painters) demonstrates his ability in landscape painting among other themes as well as how much recognition he received at the time; some of these works are currently available.
 Kim Deuk-shin’s landscape paintings carry two styles of landscape painting in Late Joseon Dynasty: literati landscape painting of the ideal and conceptual landscape and true-view landscape painting that painted mountains and rivers in Korea. This allows better understanding of his diverse works, as well as the variety of trends and transformations of the landscape painting in the Late Joseon Dynasty. In addition, compared to other themes such as genre, figure painting of Taoism and Buddhism, birds and animals, and flowers and animals that had been apparently influenced by Kim Hong-do’s style, his landscape painting has a different pattern due to being directly and indirectly influenced by a number of preceding painters including Jeong Seon (鄭敾, 1676-1759), Sim Sajeong (沈師正, 1707-1769), Kim Eung-hwan (金應煥, 1742?-1789), and Kim Hong-dothat were largely established in the area of landscape painting At the same time, it is also possible to observe the Gaeseong Kim family’s painting style from Kim Deuk-shin’s landscape paintings as they show association with those of his uncle Kim Eung-hwan, brother Kim Seok-shin (金碩臣, 1958-?) and Kim Ha-jong (金夏鍾, 1793-1875 afterwards). Kim Deuk-shin’s landscape painting style may have been passed on to Kim Seok-shinand Kim Ha-jong through secondary influence from Kim Eung-hwan, who was influenced by Jeong Seon and Sim Sajeong. Based on this, his landscape painting style appears to have had a significant influence on the establishment of the painting style within the Gaeseong Kim family and on later generations of court painters.

Advanced imaging techniques applied to the Knossos statuette inscription

The inscription of the statuette from Knossos, Heraklion Archaeological Museum Λ 95, has proven over the years to be exceedingly difficult for the correct identification of its hieroglyphic signs. The signs vary widely in their quality of engraving, with some being so small and shallow that they cannot be recognized at all by traditional techniques, and the stone’s surface shows evidence of ‘staining’ after many centuries of burial in the temperate soil. Furthermore, it appears that some signs were never actually completely engraved, with what appears to be remnants of the original marking paint, now bridging areas of disjoint engravings. Optical Profilometry equipment was employed to unambiguously resolve the engraved parts of the inscription, while Multi-Spectral Imaging was used to identify the areas of remnant marking paint.

A SEMI-AUTOMATED METHODOLOGY FOR 3D IMAGING OF LARGE VAULTED CEILING PAINTINGS

Abstract. 3D imaging of large painted and vaulted historic ceilings offers many challenges, including those due to complex small and large-scale geometry, environmental conditions and limited access. In this paper we introduce CHAPI (Cultural Heritage Automated Photogrammetric Imaging), a low cost solution to these problems which provides an efficient, semi-automated method of capturing large vaulted ceiling paintings in high detail, with a consistent photogrammetric network and in limited time. We will present and examine two different case studies from the Plafond3D project, the baroque ceiling paintings of the Schloss Rheinsberg Spiegelsaal (mirror room) and the Ansbach Residence Festsaal (great hall/ballroom). The paper will examine the particular challenges of capturing large painted areas with accurate colour and geometric reproduction, and suggest how the photogrammetric recording and reconstruction process of ceilings can be optimised for large rooms. This paper also gives technical specifications and Open Access Code for the CHAPI build.

Performance testing of nanocomposite based coatings with high dust pickup resistance and solar reflective index for energy efficiency in built environment

Cool paints/coatings are passive solutions which enable reduction in energy loads and impart substantially in buildings owing to their reflective properties. The most common metric to assess their performance is the Solar Reflective Index (SRI). Higher SRI values for paints enable the reflectance of solar radiation and further aid in reducing the cooling load in buildings. This study presents the development and testing of a novel nanocomposite-based coating, NanoDPR, designed to offer high dust pickup resistance and solar reflective index for energy efficiency in the built environment. The research addresses the challenges of dust accumulation affecting the long-term performance of such cool coatings in arid climatic conditions of the UAE. The study includes experimental investigation, conducted over 1000 days, demonstrated that the NanoDPR coating exhibits superior resistance to dust pickup and a lower reduction in SRI values compared to a reference coating. The work further extends to modelling on a residential townhouse for energy savings evaluation. The results revealed a 5% reduction in energy consumption annually and an avoidance of 2.75 kg of CO2/m2 of exterior painted area with the NanoDPR coating in comparison with conventional reflective paints. Results show that the development and adoption of such coatings can significantly impact energy consumption and carbon emissions, ultimately promoting a more sustainable future.

High-Dynamic-Range Spectral Reflectance for the Segmentation of Paint Pigment: Application to Dalí's Oil Painting Dos Figuras (1926).

Restorers and curators in museums sometimes find it difficult to accurately segment areas of paintings that have been contaminated with other pigments or areas that need to be restored, and work on the painting needs to be carried out with minimum possible damage. It is therefore necessary to develop measurement systems and methods that facilitate this task in the least invasive way possible. The aim of this study was to obtain high-dynamic-range (HDR) spectral reflectance and spatial resolution for Dalí's painting entitled Two Figures (1926) in order to segment a small area of black and white pigment that was affected by the contact transfer of reddish pigment from another painting. Using Hypermatrixcam to measure the HDR spectral reflectance developed by this research team, an HDR multispectral cube of 12 images was obtained for the band 470-690 nm in steps of 20 nm. With the values obtained for the spectral reflectance of the HDR cube, the colour of the area of paint affected by the transfer was studied by calculating the a*b* components with the CIELab system. These a*b* values were then used to define two methods of segmenting the exact areas in which there was a transfer of reddish pigment. The area studied in the painting was originally black, and the contamination with reddish pigment occupied 13.87% to 32% of the total area depending on the selected method. These different solutions can be explained because the lower limit is segmentation based on pure pigment and the upper limit considers red as an exclusion of non-black pigment. Over- and under-segmentation is a common problem described in the literature related to pigment selection. In this application case, as red pigment is not original and should be removed, curators will choose the method that selects the highest red area.

Crack identification using smart paint and machine learning

Information on the presence and location of cracks in civil structures can be precious to support operators in making decisions related to structural management and scheduling informed maintenance. This paper investigates the efficacy of supervised machine learning to solve the inverse electrical impedance tomography problem and to reconstruct the conductivity distribution of a piezoresistive sensing film. This film consists of a conductive paint applied onto structural components, and operators can use its conductivity distribution to identify crack sizes and locations in the underlying structure. A deep neural network is employed to reconstruct a dense conductivity distribution within the painted area by using only voltage measurements collected at sparse boundary locations. Since one of the most challenging aspects of using supervised learning tools for real-world applications is generating a representative training dataset, this paper presents a new approach to test the suitability of synthetic datasets built using a finite element model of the sensing film. Results are reported for four sensing specimens fabricated with two different techniques (i.e., using carbon nanotubes and graphene nanosheets, respectively). Crack-like damage is induced to the substrate of the sensing film and identified using the proposed machine learning technique. Promising results are obtained as compared to conventional methods.

Specificity of Interpretation of Compositions in Still Life

The purpose of the study is to reveal the peculiarities of interpretations of compositions in still life using the example of five productions and to illustrate them with exemplary works. The research methodology is based on the application of methods of analysis, observation, description, which allow us to investigate the peculiarities of interpretations of the given compositions. The scientific novelty lies in the fact that the author has expanded and supplemented the features of work on such an important area of watercolor painting as still life. The implementation of the set tasks is clearly demonstrated on the examples of specific productions. Conclusions. An important achievement of the research is that, like a portrait and a landscape, a still life has its own special means of influencing the mood and thoughts of the audience. Of course, a person, his/her complex spiritual world, the most diverse images of nature open up wider opportunities for the painter to interest and affect the viewer than images of "dead things". Thus, still life enables verifying that in painting not only the object of the image, but also the way it is depicted determines the content of the work. By combining various methods of work and looking for the new ones, the artist can achieve in his/her works such strength and expressiveness, juiciness and brightness of colour, the most subtle transitions of tone, depth, and various textures, which will raise his/her creativity to a qualitatively higher level. The creative principle in the work always prevails and is combined with the experiment, as well as with the emotionality of the artist, his/her ability to generalise and select, to think plastically, with visual memory. A mature artist relies on these qualities already purely mechanically, but knowledge of the basic laws of painting, drawing, and composition are always present in his/her mind, thereby forming his/her system of methods. Therefore, the main task of a young artist is to master the techniques of the craft, to master the basic laws, that is, to lay a solid foundation for the development of one's own thoughts, creative ideas, the power of expression of which will be determined, without a doubt, by the artist's talent.
 Key words: watercolor, still life, composition, natural settings, plein air, colour relationships, lighting.

Acoustic and aesthetics: The effect of paint on fabric backed by a sound absorber

This project investigates the effects of paint on the acoustic properties of the cotton and canvas fabrics. Polyurethane foam was used to back the fabric, and the dependencies on the type of paint, painted area, area distribution, and the type of fabric were analysed. One hundred and nine samples of cotton and canvas fabrics were used for this investigation. The impedance tube method, which is performed via the transfer function method, was employed to determine the acoustic properties. It is shown that the absorption of the samples is affected by the type of paint and fabric, and painted percentage area, and establishing an effective set of these parameters will result in the acoustic transparency of the fabric.

THAI experiments on iodine behavior in a room chain representing flow conditions in large containments

Iodine which can be released into the containment during a severe accident, is considered one of the most important nuclides with potential for public dose. Significantly different iodine concentrations can be expected in the individual compartments and rooms of large containments, due to geometrical constraints and the strong dependence of many iodine reactions on local thermohydraulic conditions. Such inhomogeneity may be relevant for organic iodide formation which depends on the concentration of deposited I2 and the dose rate.The objective of the two tests Iod-33 and Iod-35 was to measure the distribution of iodine along a convective flown-through room chain. This arrangement shall simulate the pathway of iodine from the locations of release (primary loop rupture) or formation (sump) along the plant rooms up to the dome of the containment and back. With respect to iodine, the aims were to measure the distribution and mixing of gaseous iodine in different rooms, the decrease of gaseous iodine by its deposition on painted surfaces, and the distribution of deposited iodine on the different painted surfaces.The two tests were performed in the two vessel THAI+ facility with additionally installed painted surfaces (painted with Gehopon epoxy paint) under superheated and condensing conditions. The main part of the painted surface area was provided in the form of painted steel sheets and arranged to form two intermediate floors within the THAI test vessel including small flow openings. Gaseous iodine was injected over several hours into the room chain in which a slow convection was established by means of differential wall heating.The gaseous I2 concentration inside the THAI+ facility increased continuously until the I2 injection was terminated. Simultaneously, the iodine deposition onto the painted surface increased. The gaseous I2 concentration decreased rapidly after stopping the I2 injection, in favor of a continuation of the I2 deposition on painted surfaces. The multi-compartment effect along the room chain has been demonstrated by the test results and the data allows for further development and validation of the I2/paint reaction model of severe accident codes.

THE STUDY OF COLORED ZONES ON THE SURFACE OF A STELA FROM THE PESCHANNY IV BURIAL GROUND

The results of studying painted areas on the surface of the Bronze Age anthropomorphic stela, found in the village of Remontnoye, are presented. The elemental and phase composition of the samples has been studied using X-ray diffraction and electron microscopy. It is established that the red color on the front surface of the stela is due to the red mineral pigment based on hematite, while the dark and green areas are of natural origin, associated with the environmental impact on the sandstone.

Safety Measures in Welding and Spray Painting in Pakistan: A Systematic Review

Use of Personnel Protective Equipment (PPE) is an integral segment in occupational safety program in order to improve injury and loss prevention; however, in developing nations the occupational safety is often undermined. Across the under developed countries, employees in informal sector are executing their duty in the absence of adequate safety setup. We conducted a Systematic literature review of studies on use and impact of protection equipment in informal sector (Welding and Spray Painting) of Pakistan. Google Scholar was searched for use of occupational personal safety studies conducted in English in two sectors (Welding and Spray Painting) in Pakistan. Search resulted in fifty six (56) studies. The initial, abstract and full text review finally yielded seven (7) studies for this review. Overall state of use of PPE was found very disappointing. No Policy exists and poor field implementation was reported. Eye Shields and gloves were among the highest available used PPEs. There was no use of respirators in welding and spray painting areas. This is the first-ever review on the state of occupational safety in informal sector (welding and spray painting) of Pakistan. Detailed studies in informal sector are required to depict the safety practices.

Automatic Wall Painter Using Raspberry PI

Abstract: This project describes development of Automatic Wall Painting Robot in real time which helps to achieve low-cost painting efficiently. It would offer the opportunity to reduce or eliminate human exposure to difficult and hazardous environments, avoids Human efforts, saves human life in risky painting like high rise buildings, which would solve most of the problems connected with safety when many activities occur at the same time. It will suit for all types of walls. The system performs the painting process using image captured by the pi camera. The painting area is calculated, and information is transferred to the spray gun. The whole process in painting is controlled by controlling circuit/Raspberrypi module. Raspberry pi module will control the DC motors, pully, paint spraying gun and connecting shaft. The pully will help in extending and retracting raises the connecting shaft and lowers it, respectively. The spray gun handle is mounted to the connection shaft, while the air compressor is set on the top platform and is turned ON/OFF at the bidding of the raspberry pi module

The use of nanostructured fluids for the removal of polymer coatings from a Nuxalk monumental carving – exploring the cleaning mechanism

• Nuxalk painted carving conserved at AMNH was darkened by aged organic coatings • The stubborn coating was identified via FTIR and NMR as aged poly(vinyl acetal) • Poly(vinyl acetal) could not be removed using conventional methodologies • Nanofluids-loaded PVA-based hydrogels were used to successfully clean the carving • Lab experiments were performed to unveil the physico-chemical cleaning mechanism While undertaking treatment of a monumental Northwest Coast wooden carving at the American Museum of Natural History, conservators encountered a difficult cleaning challenge. The 19 th century painted red cedar carving served as a house entry pole in the Nuxalk village of Bella Coola in the province of British Columbia, Canada. The painted surface was weathered by years out of doors in front of the house of Chief Pootlass and obscured by darkened museum-applied coatings and grime acquired during more than 100 years of open display at the museum. The methods used to reduce the grime and cellulose nitrate coating found on the surface overall were not successful when applied to the green painted areas on the bottom of the pole, as it was covered with an additional coating of poly(vinyl acetal) resin. The present work reports on the testing and use of aqueous nanostructured fluids (NSFs) and hydrogels for succesfully cleaning these areas, where other methods could not be used safely. There have only been a few published examples of these recently developed cleaning fluids and gels being used on art objects and this is the first known use on this type of material. Further analyses were performed following the cleaning. Micro-reflectance FTIR, optical microscopy, SEM-EDX, and NMR were used to characterize paint and coating samples taken from the carving. In addition, laboratory tests were performed to evaluate the response of poly(vinyl acetal) to a selection of NSFs, providing an understanding of the mechanisms underlying the successful cleaning performed on the pole by the conservators.