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Found 6342 publications
Operational optimisation of integrated solar combined cooling, heating, and power systems in buildings considering demand response and carbon trading
Publication Name: Energy Conversion and Management
Publication Date: 2024-09-01
Volume: 315
Issue: Unknown
Page Range: Unknown
Description:
The Solar Combined Cooling, Heat, and Power (S-CCHP) system offers a promising solution to the energy crisis and environmental concerns. Its operation optimisation is essential due to intermittent solar irradiation. However, previous studies have concentrated on the “electricity-heating” subsystem and economic costs, with less emphasis on the integrated system's broader benefits and environmental impact. This study introduces an operational optimisation approach across “electricity-heating-cooling-gas” subsystems based on the design extension of the Residential Building Heating and Electricity Production (RESHeat) system. Specifically, the approach optimises operation from both the demand and supply sides, incorporating the demand response (DR) and Ladder Carbon Trading (LCT) on the demonstration in Limanowa, Poland, to balance economic and environmental impacts. The results show that the optimised electricity is reduced by 0.71 % per day while heating and cooling demands rise by 0.57% and 0.91%. PV/T panels provide 87.11% of electricity, with excess sold back to the grid in summer. DR combined with LCT in the extension design contributed to cutting costs by 16.15 % and CO2 by 57.79% compared with the initial design, underscoring the efficacy of collaborative operational in enhancing both economic and environmental performance.
Open Access: Yes
Mental and physical health of yoga practitioners women in relation to exercise parameters
Publication Name: Mentalhigiene Es Pszichoszomatika
Publication Date: 2023-05-19
Volume: 24
Issue: 1
Page Range: 58-74
Description:
Introduction: Numerous international studies have shown that yoga practice has a positive effect on the physical and mental condition of healthy people and can play a role in the complementary treatment of certain diseases with appropriate guidance. Research on yoga practitioners has found positive correlations between several health indicators and the frequency of yoga practice and, in part, the yoga practice time. In terms of women s health, yoga has been shown to have a positive effect in relieving depression, anxiety and stress and several somatic symptoms. Objective: The aim of our study is to assess the subjective mental and physical symptoms of the health of Hungarian women practicing yoga, and to examine the associations between these variables between groups separated by yoga time and frequency. Methods: The study sample consisted of 457 healthy women with a mean age of 42.28 years (SD = 11.72), yoga practitioners 72%, and yoga instructors 27.7%. The Depression Anxiety Stress Scale-21 (DASS-21), Positive and Negative Affect Schedule (PANAS), Self-rated Health, and the Patient Health Questionnaire Somatic Symptom Severity Scale (PHQ-15) were used to measure the variables. Differences between the formed groups were analyzed by Kruskal-Wallis H and Mann-Whitney U tests. Results: We found a statistically significant difference between the three yoga time groups (beginner 1-6 months, intermediate 7-35 months, advanced ≥3 years) in depression (x2(2, n = 457) = 23.205, p < 0.001), anxiety (x2( 2, n = 457) = 9.489, p = 0.009), stress (x2(2, n = 457) = 27.224, p < 0.001), positive affect (x2(2, n = 456) = 7.689, p = 0.021), negative affect (x2( 2, n = 456) = 46.177, p < 0.001), self-rated health (x2(2, n = 457) = 28.862, p < 0.001) and somatic symptoms (x2(2, n = 455) = 26.022, p < 0.001) score. We also found a significant differences between the two yoga frequency groups (1-2 times per week and 3-7 times per week) in depression (U(1) = 19148.50, n1 = 161, n2 = 295, Z =-3.508, p < 0.001), stress (U(1) = 19588.50, n1 = 161, n2 = 295, Z =-3.107, p = 0.002), positive affect (U(1) = 18189.00, n1 = 161, n2 = 294, Z =-4.090, p < 0.001), negative affect (U(1) = 18456.50, n1 = 161, n2 = 294, Z =-3.894, p < 0.001), self-rated health (U(1) = 18244.00, n1 = 161, n2 = 295, Z =-4.873, p < 0.001) and somatic symptoms (U(1) = 19777.50, n1 = 160, n2 = 294, Z =-2.817, p = 0.005). A medium effect size difference was observed for negative affectivity and small effect size differences were observed for the other measured variables. Conclusions: Yoga could be recommended for relieving depression, anxiety, stress, and somatic symptoms, as well as a possible coping strategy for dealing with stress for healthy women. The results suggest that prolonged yoga practice (in years) or repeated physical exercises of yoga (asana) several times a week (3 or more times) may provide the greatest health benefits.
Open Access: Yes
Biostimulant effect of quantitative indicators of winter rape (Brassica napus L.) quantitative indicators
Publication Name: Bio Web of Conferences
Publication Date: 2024-08-23
Volume: 125
Issue: Unknown
Page Range: Unknown
Description:
In recent years, one of the major challenges for plant breeders has been the control of abiotic environmental stresses (drought, UV stress, salt concentration, water pressure). Increasingly variable and unpredictable weather anomalies are a warning of the detrimental effects they have on the growth of our crops and prevent us from reaching the potential of our genetic potential and nutrient supply. To prevent and reduce losses, the potential to protect plant health and increase plant resistance to stress must be anticipated and applied in the future if we are to be successful in agricultural production. One element of this is plant biostimulation. Today, crop producers use biostimulants as a compliance pressure, to obtain more subsidies (Agriecological Programme). Biostimulants applied inappropriately (mixed with herbicides), targeted, and at the right time, can have the opposite effect. This also induce irreversible processes in the crop plant. Although the winter swede rape area has been significantly reduced in our country, there are those who persevere despite the difficulties of growing it. Rapes can be successfully grown today with great care and intensive technology, and the weather conditions of recent years have consistently shown that environmental anomalies have a significant impact on its yield. In rapes, the use of biostimulators and fertilising products is considered common. Our studies with Quantis in rapes have clearly proven its effectiveness. In this article we would like to present the effect of biostiumulant (Quantis) on the production of rapes.
Open Access: Yes
Analysis of Road Users’ Risk Behaviors in Different Travel Modes: The Bangkok Metropolitan Region, Thailand
Publication Name: Infrastructures
Publication Date: 2023-04-01
Volume: 8
Issue: 4
Page Range: Unknown
Description:
This study explores road users’ behaviors and accident analyses on different travel modes in the Bangkok Metropolitan Region (BMR). The questionnaire survey was adopted and designed based on contributing factors related to risk behavior perceptions in different travel modes. A total of 3000 participants submitted questionnaires that provided data for a multiple regression model analysis. The results indicated that different travel modes have different risk behavior perceptions. Road users of vulnerable modes of travel, such as walking and cycling, were more aware of risky behaviors than users of others. Risky, violent behavior may occur due to fatigue, driving while taking drugs, or aggressive tactics where the driver may lose control and cause an accident. However, driver negligence, especially violating traffic rules, may sometimes cause risky behavior. The results show that age, gender, education level, income level, marital status, driving experience, accident experience, and attitude toward road safety affect risk behavior perception. In conclusion, the differentiation of vehicles plays a vital role as a critical issue that should be understood for effectively mitigating risks in different travel patterns.
Open Access: Yes
Influence of seed rate and row spacing across on two different maturity groups of sorghum grain yield and quality characteristics
Publication Name: Bio Web of Conferences
Publication Date: 2024-08-23
Volume: 125
Issue: Unknown
Page Range: Unknown
Description:
The goal of this resesrch is to develop cultivation practices that optimize the economical cultivation of sorghum, taking into account current environmental factors., by determining the optimal seeding rate and row spacing for two different maturity groups of sorghum hybrids, RGT Icebergg (early) and RGT Huggo (mid-early). In this context, we examine the maximum achievable yield and quality characteristics. The experiment involved different plant densities: 210,000, 240,000, 270,000, and 300,000 plants/ha, and three different row spacings: 25, 45, and 76 cm. Through conducted experiments, significant differences have been observed in harvest moisture content, hectoliter weight, protein content, head size, and plant height. Significant differences were observed in the average number of head per square meter. Although similar average protein levels were measured for different genotypes, there were differences in their stability. Increasing row spacing decreased hectoliter weight, while increasing seeding rates increased it. Harvest moisture content was significantly higher with wider row spacings, while increasing plant density resulted in a slight decrease in moisture content. Looking at the average of the tested hybrids, the row spacing of 45 cm and the number of seed of 300,000 plants/ha are the most ideal combination to achieve the yield.
Open Access: Yes
Application of atomic spectroscopy for trace element analysis of fruit juices: a review
Publication Name: Bio Web of Conferences
Publication Date: 2024-08-23
Volume: 125
Issue: Unknown
Page Range: Unknown
Description:
Trace elements are crucial for human nutrition, requiring their precise analysis in fruit juices to ensure product quality and assess contamination risks. Atomic spectroscopy techniques including inductively coupled plasma mass spectrometry (ICP-MS), inductively coupled plasma optical emission spectrometry (ICP-OES), graphite furnace atomic absorption spectrometry (GFAAS), flame atomic absorption spectrometry (FAAS), atomic fluorescence spectrometry (AFS), X-ray fluorescence spectrometry (XRF), and glow discharge optical emission spectrometry (GD-OES) are sensitive, selective and versatile tools for trace element analysis of various solid and solution samples. Matrix modifiers, sample introduction and sample preparation methods are pivotal for improving the accuracy and mitigating matrix interferences. Further advancements in instrumentation are essential. This review provides a comprehensive overview of these techniques, highlighting their principles, advantages, limitations and future research directions in fruit juice analysis. Its global applications, focusing on As, Cd, Co, and Pb, along with sample preparation methods, element concentrations, detection limits, and recovery values, have been explored.
Open Access: Yes
Citrus flavonoids (naringin and hesperidin) as functional ingredients in dairy products
Publication Name: Bio Web of Conferences
Publication Date: 2024-08-23
Volume: 125
Issue: Unknown
Page Range: Unknown
Description:
Recently, the development of functional foods enriched with plant phenolic compounds attracted the attention of researchers due to their favorable health properties. Naringin (NAR) and hesperidin (HES) are two main bioflavonoids available in high concentrations in citrus (CTS) fruits, including juice processing by-products like peel, membranes, and seeds. In general, NAR and HES offer potential health benefits in various diseases including diabetes mellitus, certain types of cancer, and obesity. However, to take advantage of the benefits of flavonoids in CTS, researchers must consider various factors since the development of enriched food is valueless if the bioactive compounds are not stable in the food matrix or are not absorbed appropriately throughout the digestive system. This study presents the sensory, physicochemical, and organoleptic properties of CTS-enriched dairy products produced by different technologies. This paper also includes the extraction methods, encapsulation technologies, and beneficial effects of NAR and HES. Overall, results supported that incorporating HES and NAR improves the antioxidant properties and, in some cases, the consumer acceptance of dairy products. In the future, the application of encapsulation technologies will probably come to the fore in the functional food industry, since encapsulation is used to mask unpleasant feelings during eating, such as the bitter taste of CTS flavonoids.
Open Access: Yes
Examinations on the cultivated bacteria from the drinking water system of a healthcare building
Publication Name: Bio Web of Conferences
Publication Date: 2024-08-23
Volume: 125
Issue: Unknown
Page Range: Unknown
Description:
The aim of our research was the identification of nosocomial pathogens found in the internal drinking water network of healthcare facilities which can cause infections in hospitals. In this study, the composition of bacterial communities from the internal water network of a health institution in Győr (Hungary) was examined using standard culture-based methods. Identification of the bacterial isolates was performed using Analytical Profile Index (API). Members of 13 bacterial taxa were recovered from a multi-storey healthcare institution. 10 species were identified via API20E and API20NE testing, out of which isolates of genera Aeromonas, Pseudomonas and Sphingomonas were found in the highest proportion on different media. These bacteria can cause nosocomial infections in clinical environments, leading to serious illnesses mainly in patients, as they may have multiresistance genes. In addition, Legionella species were also identified in the water samples, which are also known to be nosocomial pathogens, since they can be spread with aerosols in hospital environments and can cause severe respiratory diseases in immunocompromised individuals.
Open Access: Yes
Sustainability in Folk Culture: Transmission of a Traditional Blue Dyeing Technique in Győr
Publication Name: Chemical Engineering Transactions
Publication Date: 2023-01-01
Volume: 107
Issue: Unknown
Page Range: 235-240
Description:
Based on blue-dyer masters’ experience, we can say that people are still interested in the technology of traditional blue dyeing. There are many people participating in trade shows. Moreover, people tend to buy and use the products produced this way. Based on the proposal of the Intellectual Cultural Heritage Professional Committee of the Hungarian National Committee of UNESCO, the tradition of blue dyeing became part of the National Register of Intellectual Cultural Heritage in 2015. Then, in 2018, to the proposal of five countries, including Hungary, the traditional trade of blue-dyeing was recognised, which thus became part of the list of intellectual cultural heritage of UNESCO. In the elaboration of the petition of nomination, a master of Győr, Ildikó Tóth and her family participated. In our study, we are giving an overview of the history of blue-dyeing, which can be dated from the end of the 17th century, of the spreading of the main techniques, and also of the state of the number of blue-dyers. Beyond the above-mentioned issues, we are dealing with the history of blue-dyeing in Győr, mentioning the more important masters, as well as the mark of the trade, which can be seen until now. In the main part of our study, we are introducing a blue-dyeing workshop in Győr, where they manufacture textiles using original devices and technology until the present day. Apart from this, we are pointing out the family story of the blue-dyer family Éhring, which embraces five generations. Moreover, we are presenting their work done in the survival of our cultural heritage, in popular education and community development, with the help of the interviews made with Ildikó Tóth and her family – who has recently received the title ‘Master of Folk Culture’. In the study, we are also publishing true stories about blue-dyer masters, about the trade and the above-mentioned family.
Open Access: Yes
DOI: 10.3303/CET23107040
