151 results on '"Technical evaluation"'
Search Results
2. Technical, Economic, and Environmental Investigation of Pumped Hydroelectric Energy Storage Integrated with Photovoltaic Systems in Jordan.
- Author
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Hammad, Bashar, Al-Dahidi, Sameer, Aldahouk, Yousef, Majrouh, Daniel, and Al-Remawi, Suhib
- Abstract
In this study, the technical and economic feasibility of employing pumped hydroelectric energy storage (PHES) systems at potential locations in Jordan is investigated. In each location, a 1 MW
p off-grid photovoltaic (PV) system was installed near the dam reservoir to drive pumps that transfer water up to an upper reservoir at a certain distance and elevation. PVsyst (Version 7.3.4) is implemented to simulate the water flow rate pumped to the upper reservoir at each location. The water in the upper reservoir is presumed to flow back into the dam reservoir through a turbine during peak hours at night to power a 1 MW load. Based on the water volume in the upper reservoir, the power generated through the turbine was estimated using HOMER Pro® (Version 3.15.3), and the power exported to the grid (when the power generated from the turbine is more than the power required by the driven load) was also determined. It is worth mentioning that scaling up the size of PV and hydropower systems is a straightforward approach considering the modular nature of such systems. However, the quantity of water in the dam reservoir that is allowed to be pumped is the main determinant for the size of a PHES system. The technical and economic results show that the potential of employing these locations to implement PHES systems is great. In addition, a study was conducted to estimate how much CO2 emissions were reduced by generating renewable energy compared to generating the same amount of energy from fossil fuels. These systems increase renewable energy in the energy mix in Jordan, stabilize the grid, and balance the loads, especially during peak periods. More importantly, PHES systems contribute to making the energy sector in Jordan more sustainable. [ABSTRACT FROM AUTHOR]- Published
- 2024
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- View/download PDF
3. Technical analysis of exploiting untapped wind power for sustainable hydrogen energy production
- Author
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Adeli, Khaoula, Nachtane, Mourad, Naanani, Hassan, Taroual, Khadija, ElMouden, Mahmoud, and Saifaoui, Dennoun
- Published
- 2024
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4. Lead was an acceptable material for Roman water supply systems.
- Author
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Margeta, Jure
- Abstract
This study analyzed the impact of lead pipes on livelihood security in Roman cities. A pressure test was conducted on a lead pipe excavated in the Roman town of Salona (Croatia), and its results are presented and analyzed. These pipes could withstand internal water pressures of up to four bar, which was four times higher than the working pressure in the Roman water delivery system. This strength was necessary owing to the load on the pipe during installation and use. The results indicate that Roman lead pipes are safe and reliable and provide appropriate leak tightness in Roman water pressure systems. This is attributed to the open and low-pressure natural concept of water supply, in which water constantly flows through a pipe system and has serpentine paths similar to rivers. However, lead negatively affects human health and the environment during production and processing, as well as soil and water during disposal and installation. Roman lead pipes could have very slightly increased the lead levels in tap water. However, the effect was unlikely to have been truly harmful owing to the constant and rapid exchange of water in the pipe network. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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5. Methodology for the comparative evaluation of vehicle technologies in intermediate cities considering electric vehicles
- Author
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Nohora España, Jackeline Murillo-Hoyos, and Eduardo Caicedo
- Subjects
Electric vehicles ,Internal combustion engine vehicles ,Technical evaluation ,Economic evaluation ,Environmental evaluation ,Individual public transportation ,Transportation and communications ,HE1-9990 - Abstract
Climate change and emissions reduction are crucial global issues that require transformations in the energy and transportation sectors. This has increased Electric Vehicles (EVs) adoption in various countries, including emerging economies like Colombia. The government in Colombia has implemented incentives and regulations to promote sustainable mobility, increasing the number of EVs and hybrids. However, beyond governmental incentives, factors such as range, availability of charging stations, and acquisition costs impact EV adoption. Therefore, vehicle owners must evaluate total ownership costs over time and technical aspects to understand EVs financial and performance advantages. In this context, a methodology is proposed to facilitate decision-making by comparing technical, economic, and environmental aspects of vehicle technologies in a specific urban transportation context. A case study for individual public transportation in Pasto, an intermediate city in Colombia (Pasto), is presented, which can be extrapolated to other cities with similar characteristics. This methodology supports governmental efforts for transport decarbonization and aims to inform cab owners about the economic benefits of new technological adoptions. The case study constructs a spatial model for individual public transportation simulated in SUMO (Simulation of Urban Mobility). By evaluating technical, economic, and environmental aspects with a realistic approach based on simulation results that considered traffic conditions and network operational parameters, helpful benchmarking is obtained to promote EVs among owners of public vehicles in the city and concludes that EV adoption for individual public transportation in Pasto is notably advantageous from a financial perspective.
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- 2024
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6. Technical Evaluation and Financial Analysis on Investment Project for Retrofitting Production Machinery at A Cement Company Plant
- Author
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Taufik, Nilda Tri Putri, and Muhammad Kevin
- Subjects
Feasibility Study ,Financial Analysis ,Investment Project ,Retrofit ,Technical Evaluation ,Industry ,HD2321-4730.9 - Abstract
Businesses must find a balance between productivity and product quality due to the industrial landscape's changing expectations and growing complexity. The manufacturing of cement at Company X, a well-known cement company in Indonesia, depends on four main raw ingredients, with clay playing a critical role in the raw mix. According to recent statistics, clay's Al2O3 composition has decreased to about 18%, which means that clay capacity needs to be adjusted in order to maintain quality requirements. A comprehensive technical evaluation of plant revealed that 17 critical machines exhibited mechanical availability below 70%, and utility analysis confirmed a shortage in meeting the required clay tonnage. This analysis identified the machines in need of retrofitting. The procurement of these vital upgrades required a substantial investment of Rp28,556,784,462.84. Additionally, the operational costs following retrofitting amounted to Rp2,087,333,957 in the first year. However, these investments translated into a significant profit of Rp11,674,480,782 in the inaugural year of operation. Critical feasibility parameters further support the viability of this project. The Net Present Value (NPV) stands at Rp252,784,069,179.53, while the Internal Rate of Return (IRR) demonstrates a robust 74.64%. The Payback Period (PP) is swift, with a mere 2.02 years required to recoup the initial investment. The Profitability Index (PI) records a substantial 8.85. These findings, derived from a comprehensive analysis, unequivocally affirm the feasibility and potential benefits of the planned investment for retrofitting production machinery at a cement company plant.
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- 2023
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7. ADMINISTRATIVE MANAGEMENT IN THE TECHNICAL EVALUATION AT THE EXPERTISE OFFICE IN THE REGION OF PASCO.
- Author
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Bernardo, Earle Tangoa
- Subjects
PUBLIC administration ,PUBLIC officers ,PROFESSIONAL ethics ,INFORMATION resources - Abstract
The aim of the study was the systematic search of information to develop the comparative analysis of several research articles through information sources, journal databases and indexed papers whose authors have experience and are related to the subject, such as Scopus, Scielo, Latindex and described with a qualitative approach. A review of 30 national and international authors was conducted to identify the technical factors necessary to apply them in technical evaluations of governmental entities and to obtain favorable results in good administration within public management. The deductive method was used to obtain results of positive impact with the elaboration of the article in order to prioritize elementary knowledge of a technical nature that allows technical evaluations with the use of standards, elaboration of projects and executions with professional experts in the field and to avoid constructive technical deficiencies. The results during the evaluation determined that all scientific articles related to technical evaluations are necessary and significant for the knowledge of all public officials to achieve good management within the administration, hiring professionals with ethics, responsibility and efficiency. The indexed article will be submitted to the indexed journal. [ABSTRACT FROM AUTHOR]
- Published
- 2023
8. Evaluation of the Implementation of an Integrated Warehouse Management System for Products in Continuous Flow in a Distribution Center of a Retail Chain.
- Author
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Ayala Person, Marcelo Emilio, Godoy Cabrera, Lucas Guillermo, López, María M., and Recalde-Ramírez, Jorge L.
- Subjects
WAREHOUSE management ,CHAIN stores ,ECONOMIC research ,INDUSTRIAL engineering ,OPERATIONS management - Abstract
Due to the complexity of the internal operations system of reception, internal movements, and distribution of merchandise in a distribution center of a supermarket chain, it is necessary to have an integrated Warehouse Management System (WMS) that streamlines internal processes and guarantees their traceability. This study aims to evaluate the technical and economic feasibility of a WMS for the continuous flow of materials that pass through this distribution center from Mariano Roque Alonso, Paraguay, which currently operates with 36 stores and has a medium/long-term projection of expansion to 50 stores, with a great diversity of products and suppliers that must be trusted for delivery. The methodology included the identification of the products with the highest rotation, the schematization of the current operational flow of the DC, and the technical and economic analysis of the proposal. One of the main results is the improvement of operating times and a greater volume of units dispatched. [ABSTRACT FROM AUTHOR]
- Published
- 2022
9. A systematic review of effects of exchanging and sharing medical images systems in a sociotechnical context: Evaluation perspectives
- Author
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S. Karimian and B. Rahimi
- Subjects
Economic evaluation ,Radiology information system ,Technical evaluation ,Sociotechnical ,Computer applications to medicine. Medical informatics ,R858-859.7 - Abstract
Background: The social perspectives of the system on how users treat the system, their performance, and their behaviors with the system evaluation are essential for program managers seeking to augment the quality of their programs and improve outcomes. This study reviewed the sociotechnical effects of exchanging and sharing medical images. Method: In March 2018 (updated September 2019), a literature review was conducted on PubMed/MEDLINE, Scopus, and Web of Science databases. In the final stage of the study, the articles that were examined in detail were those that focused on evaluating and assessing Picture Archiving and Communication Systems, Radiology Information Systems, and Teleradiology, with a view to enhancing sociotechnical knowledge. The changes and effects on healthcare settings, particularly within hospital environments, were also considered. Results: The study extracted a total of 55 relevant articles, which covered three main themes: comparing methods or instruments, economic evaluation, and technical evaluation. These evaluations focused significantly on financial issues, such as the cost-effectiveness of these systems, their impact on clinicians' workload, and comparisons between teleradiology and conventional picture-sharing methods. The evaluations primarily compared Picture Archiving and Communication Systems and Radiology Information Systems with Teleradiology systems. Discussion: The results indicated that most of the articles published on teleradiology often compared the latest methods of teleradiology with conventional methods to evaluate the quality of transmitted images, compression types, and alternative tools in a radiology department. Settings of any healthcare system are essential; thus, we are encouraged to evaluate systems from a sociotechnical perspective. Conclusions: PACS, RIS, and teleradiology can be helpful for clinicians and consumers of health information technology. The disadvantages of such systems are mainly concerned with managerial problems or technical issues.
- Published
- 2023
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10. Techno-economic Evaluation of Biodiesel Production from Edible Oil Waste via Supercritical Methyl Acetate Transesterification
- Author
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A. B. D. Nandiyanto, E. S. Soegoto, S. A. Maulana, A. W. F. Setiawan, F. S. Almay, M. R. Hadinata, R. Ragadhita, and S. Luckyardi
- Subjects
Biodiesel ,Economic Evaluation ,Edible Oil ,Non-edible Oil ,Technical Evaluation ,Transesterification ,Technology ,Geophysics. Cosmic physics ,QC801-809 - Abstract
This study aimed to assess the economic and engineering feasibility of a large-scale biodiesel manufacturing operation from edible oil waste. The edible oil model used for economic analysis in this study is palm oil waste. Several economic parameters (i.e., gross profit margin (GPM), payback period (PBP), break-even point (BEP), cumulative net present value (CNPV), profitability index (PI)), and internal rate return (IRR) were examined to inform the potential production of biodiesel from edible oil waste in ideal condition. To confirm the feasibility of a manufacturing project, the project is estimated from ideal to worst-case conditions in production activities such as analysis of changing raw material, labor, tax, utility, and selling price costs. Based on an engineering perspective, the result indicated that biodiesel production from edible and non-edible oil is feasible. From an economic perspective, economic analysis shows that biodiesel production from edible oil waste is promising because the economic parameters as analyzed show positive results. Our findings are expected to provide an industrial-scale picture of economic evaluation and layout, particularly in the production of biodiesel, which is commonly used as a renewable energy source for fuel in trucks, trains, ships, and barges.
- Published
- 2022
11. Analysis of cervicovaginal smears in terms of their technical quality.
- Author
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A., Borsuk, A., Pryczynicz, K., Ustymowicz, D., Jagodzińska, and K., Guzińska-Ustymowicz
- Abstract
Introduction: The aim of this study was to analyze the technical evaluation of cervicovaginal smears as well as the correlation of the technical quality of the smear with the patient's age. Materials and methods: The study included a group of 43,696 women who underwent exfoliative cytology. The smears were stained according to the Papanicolaou method and then underwent cytological evaluation based on the Bethesda system. Results: The technical quality of the cytology smears was found to be satisfactory (AI) in 80.6% of cases, acceptable for cytological evaluation (AII) in 19% mainly as a result of poor readability of the smear due to numerous inflammatory cells (35.5%), whereas not suitable for evaluation (AIII) was in 0.4% of cases. Moreover, there was a high proportion of smears without cells from the cervical canal in women under 50 years of age. In women over 50, the most common cause of conditional evaluation of the smear was its excessive dryness. Conclusions: In all age groups, an abundance of inflammatory cells was a factor that hindered cytologic evaluation of the smear. Only representative material containing cells from the cervical canal should be collected. It is of utmost importance to pay special attention to the correct and quick fixation of smears taken from women over 50 years of age. [ABSTRACT FROM AUTHOR]
- Published
- 2022
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12. Creative Narration as a Design Technique.
- Author
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Manias, Dimosthenis and Mavrommati, Irene
- Subjects
- *
DESIGN techniques , *NARRATION , *DIGITAL storytelling - Abstract
Creative narration is a structured ideation technique based on storytelling. It has the potential to enhance the initial design process of ideation in terms of collaboration and creativity. People from various disciplines, following specific steps, collaborate to create a story. Afterward, inspired by their stories, they create products and services. In this paper, two case studies are presented and compared, where the technique of creative narration was used in the contexts of two creative workshops. An initial assessment of this process, highlighting the strong and weak points of the technique, is discussed in this paper. [ABSTRACT FROM AUTHOR]
- Published
- 2022
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13. External quality assessment (EQA) combined with on-site technical evaluation for capacity building in clinical microbiology laboratories in Pakistan.
- Author
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Saeed, Noureen, Zeeshan, Muhammad, Saeed, Dania Khalid, Farooqi, Joveria, Shakoor, Sadia, Ahmed, Imran, Jabeen, Kausar, Rao, Jason, and Hasan, Rumina
- Abstract
Objectives: Implementation of standard laboratory practices towards accurate antimicrobial susceptibility testing (AST) is challenging in resource-constrained settings. Efforts to improve AST are required to address knowledge and practice gaps in such settings. In this study, we aimed to address these gaps through external quality assurance surveys and mentoring of laboratories in Pakistan. Methods: This prospective study (May 2017–September 2019) included 10 consenting laboratories. External quality assessment (EQA) was conducted quarterly and performance scored. Each EQA cycle was followed by an on-site technical visit during which AST methodology, quality procedures and laboratory safety were evaluated using a questionnaire developed for this study. Cumulative scores of performance in the EQA and in the technical evaluation were designated "Composite Laboratory Performance Score; CLPS". During on-site visits, feedback provided was to each participating laboratory towards addressing gaps identified. Results: Over the course of the study, our data show significant improvement in CLPS amongst the laboratories included. While improvement in the CLPS scores varied between laboratories, a linear regression model showed improvement within the cohort from 21.37 (May 2017) to 91.5 (September 2019); a significant overall increase of 70.13 points (p = 0.001). Conclusion: Interventions to improve AMR surveillance include quality assured reporting of antimicrobial resistance. Our data show that in resource-limited settings EQA surveys and on-site evaluations followed by guidance contribute towards such improvement. We propose that this model would be a useful tool for laboratory strengthening in such settings. [ABSTRACT FROM AUTHOR]
- Published
- 2022
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14. A Modelling Study of Post-Combustion Capture Plant Process Conditions to Facilitate 95–99% CO2 Capture Levels From Gas Turbine Flue Gases
- Author
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Stavros Michailos and Jon Gibbins
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ultra-high post combustion capture ,net-zero ,process modelling ,Aspen Plus CCSI ,technical evaluation ,General Works - Abstract
The principal purpose of this study is to examine the changes in process conditions that might be needed to achieve up to 99% capture levels in amine post-combustion capture (PCC) plants for combined cycle gas turbine (CCGT) flue gases. This information is of interest since, while 95% capture is adequate for current market and regulatory conditions, net zero fossil emissions (99% capture for a CCGT plant) will be required to deliver global climate mitigation targets and is increasingly a target for national climate policies. The conventionally-configured plant in the study is based on FEED studies carried out by Bechtel Corporation and uses MEA at 35% w/w. Performance modelling is undertaken using the Aspen Plus CCSI MEA Steady State Model. The results show that efficient operation at higher capture levels appears to be feasible with minimal adjustments to the plant configuration, provided that the absorber has a sufficient packing height and the stripper is capable of operation at pressures above 2 bar. The study primarily focuses on operation at low lean loadings (0.09–0.15 molCO2/molMEA) and correspondingly low L/G ratios (
- Published
- 2022
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15. Rotary thermal desorption technology for treatment of oil-based drilling cuttings in shale gas industry.
- Author
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Wu, Jiwei, Zhang, Shifan, Duan, Xiaoxu, Li, Jian, Wu, Tianlong, Su, Zhenhua, Liu, Shengtao, Zhu, Junlong, Wang, Lixiang, Yi, Xianzhong, and Jiang, Xia
- Subjects
- *
THERMAL desorption , *SHALE gas industry , *HAZARDOUS wastes , *HEAT conduction , *POLLUTION , *HAZARDOUS waste management - Abstract
[Display omitted] • The 0.14–0.2% oil content of treated cuttings qualified the environmental standards. • The temperature difference between device and cuttings became less than 5 K. • The recovered oil was recyclable C 9 -C 23 alkanes. • Through technical evaluation, the oil removal efficiency score of this technology was high. Oil-based drilling cuttings are hazardous wastes in shale gas exploitation and need careful treatments to reduce environmental pollution and waste of resources. One of most widely employed waste-treatment technologies is the thermal desorption due to its high oil recovery efficiency. However, it usually suffers low heat exchange efficiency, thus leveraging operation costs and equipment instability. Toward the end of alleviating limitation, this study rationally designs the structure of the heating component under the guidance of the flat wall heat conduction theory, and uses numerical simulation to analyze the heat transfer of the structure. A rotary thermal desorption technology was thus developed and evaluated. The simulation results showed that given a short time of 800 s the temperature difference between device and cuttings became less than 5 K, indicating good heat exchange efficiency. Large inlet radius of device and high inlet velocity of heat transfer oil were critical parameters to maintain high heat transfer rate. Through industrial experiments verification, the 0.14–0.2 % oil content of treated cuttings qualified the environmental standards. The components of the recovered oil were recyclable C 9 -C 23 alkanes, and the dichromate oxidizability of recovered water was less than 500 mg/L limit. Comparing with other technologies, the scores suggested that this technology was a promising candidate for treating oil-based drilling cuttings. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
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16. Engineering and economic analysis of the production of sieve shaker for teaching particle size to students with visual impairment.
- Author
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Maryanti, Rina, Dani Nandiyanto, Asep Bayu, Hufad, Achmad, Sunardi, S., Ragadhita, Risti, Fiandini, Meli, and Bilad, Muhammad Roil
- Subjects
- *
ENGINEERING mathematics , *VISION disorders , *PRODUCTION (Economic theory) , *SIEVES , *CORPORATE profits - Abstract
The purpose of this study was to evaluate the feasibility study in the production of sieve shaker for teaching particle size to students with visual impairment. The sieve shaker is important as a tool for understanding the definition of particles and their sizes, while this equipment has been well developed for engineering purposes. Different from other sieve shakers that are expensive, the present sieve shaker is just for educational goals only (especially for being used in developing countries), making the design of this equipment simpler, user friendlier, and more portable. The feasibility study was done from the engineering and economic perspectives. Engineering analysis was performed based on a simple mass balance analysis, adding it to the calculation of scale-up production from commercially available apparatuses. Economic evaluation was carried out using a number of economic parameters, including gross profit margin, payback period, and net profit value, in which all calculations were done under ideal and nonideal conditions (labor conditions, sales and raw materials, utilities, and external conditions and environmental uncertainties (competition, taxes and subsidiaries)) in 20 years (y) of project. All prices, utilizing components, and specifications for the apparatuses used in the scale-up production were taken based on the available online shopping web. The results of the engineering confirmed that the project was potentially conducted, even in small-scale industries because all processing steps could be carried out using simple equipment that is commercially available in the market. Economic evaluation results showed positive values for all economic parameters with a few exceptions. This research was complemented by some basic theories to support the definition of sieve shaker. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
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17. An economic feasibility study using a system-dynamics-based archetype of RFID implementation in a manufacturing firm.
- Author
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Elizondo-Noriega, Armando, Tiruvengadam, Naveen, and Guemes-Castorena, David
- Abstract
Industry 4.0 is an emerging manufacturing paradigm that relies on high-speed connectivity and myriad sensors for real-time data collection, defect detection, and cycle time reduction among other things. Radio Frequency Identification (RFID) is one technology within this paradigm that has reliably and affordably enabled Industry 4.0 initiation and eventual adoption by manufacturing facilities owing to its proven ability to track inventory and such. Despite the maturation of the RFID technology, relatively little is known about its overall economic impact on a firm. A paucity of such economic information—that can otherwise be overcome through techno-economic analysis (TEA) based on simulation—on RFID serves as a detriment to its adoption by smaller firms with limited capital, especially in developing countries where the cost of capital is high. That, in turn, delays the advancement of supply chains and ecosystems to the Industry 4.0 paradigm causing inefficiencies and imabalnced development. Ex-Ante TEA simulation affords a holistic approach to compute the cost/benefit ratio of the implementation of new technology. Further, it allows the estimation of critical parameters that helps minimize the risk of investment failure. In this study, we propose System Dynamics (SD) modeling as the basis for such ex-ante TEA. SD simulation confirms that the adoption of RFID, despite its initial capital requirements and availability, is economically feasible and beneficial because of RFID's potential to reduce operation costs considerably over time. [ABSTRACT FROM AUTHOR]
- Published
- 2021
- Full Text
- View/download PDF
18. Creative Narration as a Design Technique
- Author
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Dimosthenis Manias and Irene Mavrommati
- Subjects
design automation ,creative narration ,technical evaluation ,ideation ,design thinking ,Information technology ,T58.5-58.64 - Abstract
Creative narration is a structured ideation technique based on storytelling. It has the potential to enhance the initial design process of ideation in terms of collaboration and creativity. People from various disciplines, following specific steps, collaborate to create a story. Afterward, inspired by their stories, they create products and services. In this paper, two case studies are presented and compared, where the technique of creative narration was used in the contexts of two creative workshops. An initial assessment of this process, highlighting the strong and weak points of the technique, is discussed in this paper.
- Published
- 2022
- Full Text
- View/download PDF
19. Technical feasibility evaluation of a solar PV based off-grid domestic energy system with battery and hydrogen energy storage in northern climates.
- Author
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Puranen, Pietari, Kosonen, Antti, and Ahola, Jero
- Subjects
- *
BATTERY storage plants , *GROUND source heat pump systems , *HEAT pumps , *HYDROGEN storage , *ELECTRIC power , *ENERGY storage - Abstract
Self-sustaining off-grid energy systems may require both short-term and seasonal energy storage for year-around operation, especially in northern climates where the intermittency in both solar irradiation and energy consumption throughout the year is extreme. This paper examines the technical feasibility of an off-grid energy system with short-term battery storage and seasonal hydrogen storage, comprising a water electrolyzer and a fuel cell. The study is based on data from a currently grid-connected residential single-family house in Finland with an existing 21 kWp photovoltaic (PV) installation and a ground source heat pump based heating system. Energy system performance is simulated using real PV power generation data as well as data on grid electricity import and export from the house over a three-year period to find the minimum combination of battery and hydrogen storage system capacities capable of year-round off-grid operation. It is concluded that technically feasible solutions are available for the proposed setup. The most significant factor affecting the system dimensioning is found to be high peak electric power demand during times of low PV power generation, indicating a need for smart power control. Demand for battery storage capacity is found to be significant only to about 20 kWh. Fuel cell and electrolyzer nominal powers of at least 4 kW and 5 kW to 7 kW, respectively, were found to be sufficient for off-grid operation with the studied system. The storage capacity demand for 170–190 kg of hydrogen annually is, however, impractically large for residential houses. [ABSTRACT FROM AUTHOR]
- Published
- 2021
- Full Text
- View/download PDF
20. Evaluation of PV output in terms of environmental impact based on mathematical and artificial neural network models.
- Author
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Kazem, Hussein A.
- Subjects
- *
ARTIFICIAL neural networks , *STANDARD deviations , *DATABASES , *APPETIZERS , *UNCERTAINTY - Abstract
Summary: This paper presents different prediction models for a grid‐connected photovoltaic (GCPV) system based on long‐term data sets. A 1.4 kW GCPV installed in Sohar, Oman, where measurements of the electrical and environmental parameters are taken every second for 5 years (from May 2014 to April 2019) to reduce uncertainty and improve the proposed model's accuracy. The highest power and energy measured from the GCPV are 1180 W and 245.8 kWh, respectively. Mathematical regression and cascade‐feed forward propagation (CFNN) models for PV current, voltage, and power were proposed in terms of environmental impact. A NeuroSolutions package was used to propose GCPV models for electrical quantities. An evaluation criterion is defined, in this study, to assess the system's performance. The proposed models show excellent agreement with the measured experimental data. However, CFNN shows a superior accuracy compared with empirical and regression proposed models. The two models have proposed a dispute, but the model relating the solar irradiation and ambient temperature to GCPV current is more accurate. To evaluate and validate the proposed CFNN models, mean square error, MAE, root mean square error, and R2 metrics have been used as a criterion and compared with different artificial neural networks models in the literature. The proposed CFNN is found to give the most accurate results in terms of MSE = 0.0007, MAE = 0.4310, and RMSE = 0.0290 and highest accuracy R2 = 0.9999, which shows the effectiveness and feasibility of the proposed models. [ABSTRACT FROM AUTHOR]
- Published
- 2021
- Full Text
- View/download PDF
21. A Technical and Economic Study of a Photovoltaic-phase Change Material (PV-PCM) System in Jordan.
- Author
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Nijmeh, Salem, Hammad, Bashar, Al-Abed, Mohammad, and Bani-Khalid, Riad
- Subjects
- *
INTERNAL rate of return , *NET present value , *PHASE change materials , *COMMERCIAL buildings , *OFFICE buildings , *PAYBACK periods - Abstract
This work presents a technical and economic evaluation of the application of phase change material (PCM) in the cooling and thermal regulation of photovoltaic (PV) panels. The technical study is performed based on experimental tests carried out on two identical 3.99 kWp PV systems for one full year at the Hashemite University, Jordan. The backside of the first system was integrated with BioPCM. It is a safe, environmentally friendly, and economically sustainable product that is typically employed in the building industry to save energy in HVAC. This PCM has the potential to answer the many concerns associated with the traditional PCMs. The second PV system is used as a reference for performance comparison purposes. The actual performance results show there is an increase of 3.4% in the annual power production due to the application of BioPCM. The annual conversion efficiency is 12.50% for the PV/BioPCM system, while it is 12.08% for the reference PV system. The economic study investigates the viability of the inclusion of PCM in terms of the payback period, net present value, and internal rate of return. These parameters indicate that the PCM investment is economically unattractive at present. [ABSTRACT FROM AUTHOR]
- Published
- 2020
22. Comparative analysis between subjective and instrumental quality assessment through advanced technology: a pilot study on tennis serve.
- Author
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IZZO, RICCARDO, RAIOLA, GAETANO, CEJUDO, ANTONIO, SCARINGELLA, GABRIELE, CRUCIANI, ALBERTO, and VARDE'I, CIRO HOSSEINI
- Abstract
The purpose of this study in the first instance is to evaluate objectively, with data provided by latest-generation inertial sensors, the dynamic qualities of the technical-sporting gestures such as serve in tennis. Furthermore, the possible correlation between the aforementioned data and the evaluation monitoring of the specialized technical staff (Italian Tennis Federation qualified Coach) was assessed, in essence, a comparison between objective instrumental data and quality technical analysis. The study is not based on probative statistical numbers, five athletes, but the interest of the research is focused on establishing the validity, reliability and reproducibility of the information deriving from the acquisition with inertial instrumentation in the sport of tennis. The work seemed useful also by virtue of the fact that in the literature not many works have been produced on the subject at the moment, and in any case not with the latest technologies as in our case (K-Track, K-Sport Universal, Stats Perform, Montecchio PU, Italy). As mentioned, the research took into consideration the technical fundamental of the serve, an element that has taken on more and more importance in modern tennis in the achievement of the point and therefore in the result of the game. The serve is the stroke that marks the beginning of each point and that can influence the continuance of the same. Moreover, due to the speed of the surfaces of the fields and the game, the serve became in effect a substantial percentage of the final victory of the match. This is the basic motivation that led us to analyse this fundamental and its biomechanical composition, however, highlighting those elements that best qualify the gesture in a performative sense, trying to establish parameters that can be considered helpful for the technical staff and for the tennis player, in order to improve their performance. [ABSTRACT FROM AUTHOR]
- Published
- 2020
- Full Text
- View/download PDF
23. MODELLING AND SIMULATION OF METHANOL PRODUCTION FROM COKE OVEN GAS.
- Author
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PETRESCU, LETITIA and CRISAN, DUMITRITA-AURA
- Subjects
METHANOL production ,AMINES ,METHANOL as fuel ,STEAM reforming ,RAW materials ,SIMULATION methods & models - Abstract
Coke Oven Gas (COG) is highly rated as a valuable by-product of coke production used in the steel industry. The production of methanol from COG-derived syngas has been investigated in the last period due to its practicality as well as to the recent interest in methanol over the past years. Two case studies, using COG and CO
2 as raw-materials, are simulated and compared in the present study. In the first case the intermediate step is the dry methane reforming (DMR) while in the second case the intermediate step is steam methane reforming (SMR). The syngas obtained is furthermore converted to methanol. Beside the transformation of COG into methanol, the present study deals also with the CO2 emissions reduction, the CO2 generated in the COG combustion is captured using amine based gas-liquid absorption technology (e.g. methyl diethanolamine - MDEA)). ChemCAD process flow-modelling software was used as a tool to produce 250 t/day of methanol with purities higher than 99%. The results showed that the most advantageous technological route of COG and CO2 utilization is DMR, in which, a lower quantity of raw material (COG) and lower number of equipment is required to obtain the same amount of final product. [ABSTRACT FROM AUTHOR]- Published
- 2020
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24. A technical evaluation on the mathematical attitudes and fitting accuracy of soil moisture retention curve models.
- Author
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Rastgou, Mostafa, He, Yong, Wang, Jin, Bayat, Hossein, Shao, Meihong, Li, Yawei, and Jiang, Qianjing
- Subjects
- *
SOIL moisture , *STANDARD deviations , *AKAIKE information criterion , *CURVE fitting , *SOIL texture - Abstract
• There was no relationship between accuracy and the number of model parameters. • The new SMRC models can be developed based on power law and exponential functions. • Brutsaert, Mualem, Dexter and GG3 had high flexibility in soil textural classes. • Brutsaert can be used as a user-friendly model in hydrological modeling. Numerous mathematical equations have been formulated in the literature of different researchers for describing soil moisture retention curve (SMRC), which can be applied to simulate and solve soil hydraulic modeling problems. The primary concern lies in selecting an efficient model to simulate accurately the S-shaped curve or sigmoid-type of the SMRC for soils with different textures. Therefore, the objective of this study was a comprehensive and technical evaluation of 50 developed models of the SMRC based on the influence of parameters on the behavior of the curve and the ability of their fitting accuracy on 728 soil samples of the UNSODA dataset, that has not been investigated so far. Statistical criteria including corrected Akaike's information criterion (AICc), root mean square error (RMSE) and coefficient of determination (R 2) together with Duncan's multiple range test and cluster analysis were employed to assess the fitting accuracy of SMRC models to measured data. Results from fitting accuracy on the UNSODA dataset indicated that Brutsaert model provided the best fit to the measured data compared to other models in 14.6% of the soil samples with RMSE = 0.0125 and AICc = -94.18. This model was classified in the same cluster with Groenevelt and Grant (GG 1 , GG 2 and GG 3), Dexter, Mualem, and Fredlund and Xing models and did not have a significant difference in terms of RMSE. Also, Brutsaert model had the highest fitting accuracy in 67% of different soil textural classes compared to other models. Finally, the technical evaluation in terms of accuracy, flexibility and simplicity of the fitting process showed that the Brutsaert, Mualem, Dexter and GG 3 models can be selected for better simulation of the SMRC in water and soil research. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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- View/download PDF
25. Potential of motion analysis technologies in the quantitative study of karate technique: an experimental approach for the jump of Unsu Kata.
- Author
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COPPOLA S., MONTEMARANO L., ALBANO D., and VASTOLA R.
- Abstract
This study presents the results of quantitative analysis of the karate jump technique. The aim of the study is to investigate the correlation (r) between kinematic and kinetic parameters of the jump from the Unsu Kata. These parameters were identified during the initial phase of the jump (performance indicators), and critical elements were detected during the final phase of the jump (error indicators). The study involved an athlete with the Kata specialty. A six-camera opto-electronic system and two force platforms were used. Statistical correlation was determined between performance indicators and error indicators. The analysis and interpretation of the data reveal that contributions of the forces (ground reaction force and torque) are the most influential parameters on the other variables, which are involved in the evaluation of the jump during its final phase. It appears that the search for the adequate balance between the force components during the take-off phase, in particular the effects of the forces generated by the torque of the limbs on the body, can be considered as one of the most influential conditions for the success of the jump. The performed analysis of the only participant of the study and the complexity of the technique constitute a starting point for a future study. [ABSTRACT FROM AUTHOR]
- Published
- 2019
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26. Developing an Evaluation Model for Economic Feasibility Analysis of Using Mechanical Boring Machines (TBM vs Roadheader) in one of the Largest Coal Reserves in Iran
- Author
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Elyasi, Sadegh
- Published
- 2021
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27. Technical Evaluation of Oak Ridge Filter Test Facility
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KRISKOVICH, J
- Published
- 2002
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28. A guide to shortening the time from submission to publication in Frontiers of Environmental Science & Engineering.
- Author
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Zhang, Jiao, Huang, Xia, Hao, Jiming, and Crittenden, John C.
- Abstract
Authors want to publish their work as soon as possible. However, the manuscript processing time increases if the manuscript does not meet the journal requirements. Our analysis of manuscripts submitted to Frontiers of Environmental Science & Engineering from November 2018 to July 2019 shows that the processing time was increased up to 33 days because the manuscripts: (1) had inconsistent formatting of citations, references, and units, (2) exceeded the word limit, (3) were missing information such as the graphical abstract, (4) plagiarized other papers, and (5) had too many tables and figures. Herein, we explain how authors can avoid these issues and decrease the manuscript processing time. [ABSTRACT FROM AUTHOR]
- Published
- 2020
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29. Remote Laboratories in Engineering Education
- Author
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Ahmed NADDAMI, Ahmed FAHLI, Mourad GOURMAJ, Zoltan GERMAN-SALLO, Horaţiu-Ştefan GRIF, and Adrian GLIGOR
- Subjects
remote laboratories ,engineering education ,technical evaluation ,Engineering (General). Civil engineering (General) ,TA1-2040 - Abstract
The remote laboratory experiments in engineering education became a useful tool as a great challenge for specialists. Setting up a new educational platform with remote laboratory experiments, many students from many countries can access them in order to complete, enhance their education in engineering. This paper presents a new and full functionally remote laboratory in electronic engineering field and some criteria for technical evaluation in order to be integrated in engineering education
- Published
- 2015
30. EVALUATION OF DUMP SITE RECLAMATION TECHNIQUES IN WESTERN TURKEY COAL MINES.
- Author
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Malh, Tahir, Kun, Mete, and Tufan, Baran
- Abstract
The environment friendly development of mining applications progressed significantly due to the rapid increase in environmental awareness and requirement of available land. The reclamation studies of those lands, ruined during mining activities, should be evaluated and regained in the most effective and rational way. In recent years, especially in open pit coal mining, reclamation applications become crucial due to rapid spreading of mining companies on extensive lands. These applications were taken into account in feasibility studies and included in mining operations. The reclamation systematics of dump sites formed by stripping of open pit coal mines and depleted coal pits are investigated. In this study, the rehabilitation studies subsequent to mining activities are dealt technically and parameters affecting the success of these studies are determined. [ABSTRACT FROM AUTHOR]
- Published
- 2018
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31. Feasibility of optimized ultralow-dose pulsed fluoroscopy for upper gastrointestinal tract examinations: a phantom study with clinical correlation.
- Author
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Weiss, Jakob, Pomschar, Andreas, Rist, Carsten, Neumaier, Klement, Li, Minglun, Flatz, Wilhelm, Thierfelder, Kolja, and Notohamiprodjo, Mike
- Abstract
Purpose: To establish an optimized ultralow-dose digital pulsed fluoroscopy (FP) protocol for upper gastrointestinal tract examinations and to investigate the radiation dose and image quality. Materials and methods: An Alderson-Rando-Phantom with 60 thermoluminescent dosimeters was used for dose measurements to systematically evaluate the dose-area product (DAP) and organ doses of the optimized FP protocol with the following acquisition parameters: 86.7 kV; 77 mA; 0.9 mm, automatic image noise and contrast adaption. Subjective image quality, depiction of contrast agent and image noise (5-point Likert scale; 5 = excellent) were assessed in 41 patients, who underwent contrast-enhanced FP with the aforementioned optimized protocol by two radiologists in consensus. A conventional digital radiograph (DR) acquisition protocol served as the reference standard for radiation dose and image quality analyses. Results: Phantom measurements revealed a general dose reduction of approximately 96% per image for the FP protocol as compared to the DR standard. DAP could be reduced by 97%. Significant dose reductions were also found for organ doses, both in the direct and scattered radiation beam with negligible orbital (FP 5.6 × 10 vs. DR 0.11; p = 0.02) and gonadal dose exposure (female FP 2.4 × 10 vs. DR 0.05; male FP 8 × 10 vs. DR 0.03; p ≤ 0.0004). FP provided diagnostic image quality in all patients, although reading scores were significantly lower for all evaluated parameters as compared to the DR standard ( p < 0.05). Conclusion: Ultralow-dose FP is feasible for clinical routine allowing a significant reduction of direct and scattered dose exposure while providing sufficient diagnostic image quality for reliable diagnosis. [ABSTRACT FROM AUTHOR]
- Published
- 2017
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32. Technical evaluation of a clinical, bi‐planar, digital and upright X‐ray imaging unit
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Charlotte Kelly and Ioannis Delakis
- Subjects
data collection ,Computer science ,Image quality ,R895-920 ,phantoms ,Radiation Dosage ,Field (computer science) ,030218 nuclear medicine & medical imaging ,03 medical and health sciences ,Medical physics. Medical radiology. Nuclear medicine ,0302 clinical medicine ,Planar ,Radiology, Nuclear Medicine and imaging ,quality control ,radiologic ,Simulation ,Technical Evaluation ,Radiological and Ultrasound Technology ,business.industry ,Phantoms, Imaging ,X-Rays ,Low dose ,X-ray ,Technical evaluation ,imaging ,Radiographic Image Enhancement ,Radiography ,Lower Extremity ,Dose area product ,030220 oncology & carcinogenesis ,technology ,Radiation protection ,business ,radiation protection - Abstract
We describe the technical evaluation of the commercially available, clinical, bi‐planar, low dose, digital X‐ray system (EOS System, EOS imaging, France). The unit is used for upright, weight‐bearing musculoskeletal pathologies, in particular, in the spine and lower limbs. The evaluation incorporated tests on the X‐ray generator performance, radiation/imaging field alignment, dose area product accuracy and image quality. The assessment methodology was based on objective parameters and required equipment readily available for technical evaluation of other radiological equipment. Results demonstrated that the system performs well within acceptable performance criteria with regard to X‐ray generator performance, radiation/imaging field alignment and dose area product accuracy. In addition, results from the image‐quality assessment were aligned with previously published work. The work presented in this article can be used for the technical evaluation of the EOS System at other clinical sites., Our article describes the technical evaluation of the EOS System, which is a new radiological imaging equipment used for bi‐planar, upright radiological studies, adopting novel detector design. In our work, we adapted conventional performance assessment methods to evaluate the system's X‐ray generator and dose indicator. We also incorporated the measurement of generalized values of quantitative image quality metrics, in order to recreate a more clinically relevant assessment process. The methodology and results of our work can be used by other clinical sites with the same equipment for the purposes of acceptance, commissioning and quality control testing of the equipment.
- Published
- 2021
33. Techno-Economic Evaluation of 5G Technology for Automated Guided Vehicles in Production
- Author
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Kiesel, Raphael, Henke, Leonhard, Mann, Alexander Wilhelm, Renneberg, Florian, Stich, Volker, Schmitt, Robert H., and Publica
- Subjects
economic evaluation ,TK7800-8360 ,Computer Networks and Communications ,smart production ,technical evaluation ,5G technology ,automated guided vehicles ,Hardware and Architecture ,Control and Systems Engineering ,Signal Processing ,ddc:530 ,Electrical and Electronic Engineering ,Electronics - Abstract
Electronics : open access journal 11(2), 192 (2022). doi:10.3390/electronics11020192 special issue: "Special Issue "5G Technology in Smart Manufacturing" / Special Issue Editors: Prof. Dr. Robert Schmitt, Guest Editor; Dr. Joachim Sachs, Guest Editor", Published by MDPI, Basel
- Published
- 2022
34. An Evaluation Model for Functionality Analysis of Remote Laboratories and Simulations in Engineering Education.
- Author
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Germán-Salló, Zoltán, Grif, Horaţiu-Ştefan, and Gligor, Adrian
- Subjects
ENGINEERING education ,COMPUTER simulation ,COMPUTER software ,EDUCATION research laboratories ,PARAMETERS (Statistics) - Abstract
Remote experiments in engineering education have appeared as another option after the traditional laboratories and simulations. These laboratories are some kind similar to simulation techniques in that they require minimal space and time, because the laboratory experiments can be fast configured and run over the Internet. From functional point of view these remote labs can be seen as software products and specific standards can be adapted in order to evaluate their main characteristics. The remote laboratory experiments provide real data, the simulations don’t. This paper presents a model for technical evaluation of the remote laboratories in engineering education that takes account both technical and pedagogical factors. The proposed model was applied on an educational network build in the European Tempus project called “eSience”. The main objectives of this project were to build a network of working remote laboratoriess in the Maghrebian countries, to investigate and implement the state-of-the art solutions. The main goal of the proposed evaluation model is to identify measurable educational parameters in order to estimate the functionality of remote laboratories and simulations, according to specific standards. [ABSTRACT FROM AUTHOR]
- Published
- 2017
- Full Text
- View/download PDF
35. Pilot scale nanofiltration treatment of olive mill wastewater: a technical and economical evaluation.
- Author
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Sanches, S., Fraga, M., Silva, N., Nunes, P., Crespo, J., and Pereira, V.
- Subjects
NANOFILTRATION ,WASTEWATER treatment ,DISSOLVED air flotation (Water purification) ,OSMOTIC pressure ,PHENOLS ,SEWAGE disposal plants - Abstract
The treatment of large volumes of olive mill wastewater is presently a challenge. This study reports the technical and economical feasibility of a sequential treatment of olive mill wastewater comprising a dissolved air flotation pre-treatment and nanofiltration. Different pilot nanofiltration assays were conducted in a concentration mode up to different volume reduction factors (29, 45, 58, and 81). Data attained demonstrated that nanofiltration can be operated at considerably high volume reduction factors and still be effective towards the removal of several components. A flux decline of approximately 50% was observed at the highest volume reduction factor, mainly due to increase of the osmotic pressure. Considerably high rejections were obtained across all experiments for total suspended solids (83 to >99%), total organic carbon (64 to 99%), chemical oxygen demand (53 to 77%), and oil and grease (67 to >82%). Treated water was in compliance with European legal limits for discharge regarding total suspended solids and oil and grease. The potential recovery of phenolic compounds was evaluated and found not relevant. It was demonstrated that nanofiltration is economically feasible, involving operation costs of approximately 2.56-3.08 €/m, depending on the working plan schedule and volume reduction factor, and requiring a footprint of approximately 52 m to treat 1000 m of olive mill wastewater. [ABSTRACT FROM AUTHOR]
- Published
- 2017
- Full Text
- View/download PDF
36. Technical and Economical Evaluations of Canola Harvesting Losses in Different Maturity Stages Using Three Different Combine Harverster Heads
- Author
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J Taghinazhad and M.R Mostofi Sarkari
- Subjects
Technical Evaluation ,Harvesting losses ,Canola ,Maturity Stages ,Combine ,Agriculture (General) ,S1-972 ,Engineering (General). Civil engineering (General) ,TA1-2040 - Abstract
Rapeseed cultivation in Iran is growing rapidly while this product has been facing specific problems. Every year a significant portion of edible oil is imported to the country from other countries. Despite this deficit, a great amount of canola is being lost every year. Therefore, in compliance with technical points, adding a suitable platform to the exisiting machineries may reduce the losses. A field study was conducted in Moghan Agricultural Research Centre to study the technical and economical characteristics of harvesting machineries and evaluate Canola harvesting losses in different maturity stages, using three different combine harvester heads. The experiments were conducted in a completely randomized split split plot design with four replications. The main plot included seed maturity stage at three levels: A) 60%, B) 70% and C) 80%, and the subplot was the harvester’s ground speed at three levels: A) 1.5, B) 2.5 and C) 3.5 km h-1. The sub-subplot was combine head type with three forms: A) Mechanical, B) Hydraulically Joybar and C) Hydraulically Biso's Head. The results of ANOVA showed that maximum cutter bar losses occurred with Mechanical Head (5.36%) while the loss of Hydraulically Joybar's and Biso's head were 4.28 and 4.13 %, respectively. The results also showed that the maximum cutter bar losses occurred when 80% of seeds were matured and adequate time for canola harvesting was 70% of seeds maturity. The results of analysing the effects of harvesting ground speeds showed that the maximum cutter bar losses occurred with the speed of 3.5 km h-1. Finally, the results showed that the minimum cutter bar loss was obtained with Hydraulically Joybar's head considering the benefit per cost ratio. The cost for Mechanical head and Hydraulically Biso's head were 13500 and 262500 Rial ha-1, respectively.
- Published
- 2013
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37. Technical Evaluation of Commercial Mutation Analysis Platforms and Reference Materials for Liquid Biopsy Profiling
- Author
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Christine M Ulz, Yves Konigshofer, Michael R. Speicher, Markus Sprenger-Haussels, Peter M. Abuja, Alexander Sartori, Inger Riise Bergheim, Ellen Heitzer, Vera Kloten, Dominic G. Rothwell, Menno Tamminga, Dan Brudzewsky, Sabrina Weber, Samantha Perakis, Paul van der Leest, Maria L. Aguirre Azpurua, Sumitra Mohan, Karl Kashofer, Harriet Wikman, Benjamin Spiegl, Ed Schuuring, Rita Lampignano, Damage and Repair in Cancer Development and Cancer Treatment (DARE), and Targeted Gynaecologic Oncology (TARGON)
- Subjects
0301 basic medicine ,Cancer Research ,Computer science ,molecular profiling ,Computational biology ,lcsh:RC254-282 ,Article ,cell-free DNA ,03 medical and health sciences ,0302 clinical medicine ,Profiling (information science) ,Liquid biopsy ,cfDNA ,diagnostic leukaphereses ,mutation analysis ,reference material ,circulating tumor DNA ,Technical evaluation ,ctDNA ,lcsh:Neoplasms. Tumors. Oncology. Including cancer and carcinogens ,Clinical routine ,assay validation ,Clinical Practice ,030104 developmental biology ,Oncology ,Circulating tumor DNA ,030220 oncology & carcinogenesis ,Test performance ,performance assessment - Abstract
Molecular profiling from liquid biopsy, in particular cell-free DNA (cfDNA), represents an attractive alternative to tissue biopsies for the detection of actionable targets and tumor monitoring. In addition to PCR-based assays, Next Generation Sequencing (NGS)-based cfDNA assays are now commercially available and are being increasingly adopted in clinical practice. However, the validity of these products as well as the clinical utility of cfDNA in the management of patients with cancer has yet to be proven. Within framework of the Innovative Medicines Initiative (IMI) program CANCER-ID we evaluated the use of commercially available reference materials designed for ctDNA testing and cfDNA derived from Diagnostic Leukaphereses (DLA) for inter- and intra-assay as well as intra- and inter-laboratory comparisons. In three experimental setups, a broad range of assays including ddPCR, MassARRAY and various NGS-based assays were tested. We demonstrate that both reference materials with predetermined VAFs and DLA samples are extremely useful for the performance assessment of mutation analysis platforms. Moreover, our data indicate a substantial variability of NGS assays with respect to sensitivity and specificity highlighting the importance of extensive validation of the test performance before offering these tests in clinical routine practice.
- Published
- 2020
38. Comprehensive Analysis of Ecological Restoration Technologies in Typical Ecologically Vulnerable Regions around the World
- Author
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Yun-Jie Wei, Qi Luo, Yu Xiao, Lin Zhen, and Shuang Wang
- Subjects
effect analysis ,restoration technology ,media_common.quotation_subject ,ecological restoration ,Geography, Planning and Development ,technical evaluation ,TJ807-830 ,Environmental pollution ,Management, Monitoring, Policy and Law ,TD194-195 ,Renewable energy sources ,Ecosystem degradation ,GE1-350 ,Ecosystem ,Restoration ecology ,ecologically vulnerable region ,media_common ,Sustainable development ,Effect analysis ,Environmental effects of industries and plants ,Renewable Energy, Sustainability and the Environment ,business.industry ,Environmental resource management ,Technical evaluation ,Environmental sciences ,Desertification ,Environmental science ,business - Abstract
Ecosystem degradation is a key issue facing the world. Rapid economic development has been achieved at the cost of degradation and environmental pollution, which has affected human well-being, particularly in fragile ecosystems. To achieve the United Nations sustainable development goals, it is essential to develop technologies to control degradation and restore ecosystems. However, a comprehensive assessment of the different types of degradation, of the methods used in different regions, and of the differences between regions has not been carried out. In this study, we examined databases of international organizations, interviewed experts to evaluate existing methods based on five dimensions, identified restoration technologies (hereinafter referred to as RTs) suitable for different types of degradation, and summarized the restoration effectiveness in different regions. We found 101 RTs around the world and found that the same technology can be applied in different regions. The RTs were dominated by engineering and biological RTs, accounting for 19.2–26.7% and 33.4–34.7% of the total, respectively. 45, 30, and 26 RTs were suitable for controlling soil erosion, sandy desertification, and degraded ecosystem, respectively. The average evaluation index of RTs for controlling these degradation problems are 0.81, 0.78, and 0.73, respectively meaning RTs used to fight soil erosion are more effective. The potential to transfer a technology to other regions and the readiness of the technologies were low for degraded ecosystems, and the ease of use was high for sandy desertification RTs. Although a given technology could be applied to different regions or degradation types, results varied. Our study will help ecosystem managers to deal with specific degradation issues, phases, and severities, and will support the transfer of RTs among regions.
- Published
- 2021
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39. Effect of Electric Vehicles Charging Loads on Realistic Residential Distribution System in Aqaba-Jordan
- Author
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Ruia Dahoud, Saeed Alyami, Al-Motasem I. Aldaoudeyeh, Abdulaziz Almutairi, Eyad S. Hrayshat, Mohammad A. Obeidat, and Ayman M. Mansour
- Subjects
distribution system ,low-voltage network ,business.product_category ,TA1001-1280 ,Computer science ,Monte Carlo method ,Technical evaluation ,electric vehicle ,Statistical model ,Automotive engineering ,TK1-9971 ,Distribution system ,Transportation engineering ,probabilistic model ,Automotive Engineering ,Electric vehicle ,Dynamic demand ,charging load ,Electrical engineering. Electronics. Nuclear engineering ,Reduction (mathematics) ,business ,Voltage drop - Abstract
In recent years, air pollution and climate change issues have pushed people worldwide to switch to using electric vehicles (EVs) instead of gas-driven vehicles. Unfortunately, most distribution system facilities are neither designed nor well prepared to accommodate these new types of loads, which are characterized by random and uncertain behavior. Therefore, this paper provides a comprehensive investigation of EVs’ effect on a realistic distribution system. It provides a technical evaluation and analysis of a real distribution system’s load and voltage drop in the presence of EVs under different charging strategies. In addition, this investigation presents a new methodology for managing EV loads under a dynamic response strategy in response to the distribution system’s critical hours. The proposed methodology is applied to a real distribution network, using the Monte Carlo method and the CYME program. Random driver behavior is taken into account in addition to various factors that affect EV load parameters. Overall, the results show that the distribution system is significantly affected by the addition of EV charging loads, which create a severe risk to feeder limits and voltage drop. However, a significant reduction in the impact of EVs can be achieved if a proper dynamic demand response programme is implemented. We hope that the outcomes of this investigation will provide decision-makers and planners with prior knowledge about the expected impact of using EVs and, consequently, enable them to take the proper actions needed to manage such load.
- Published
- 2021
40. Generating synthetic contrast enhancement from non-contrast chest computed tomography using a generative adversarial network
- Author
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Seunghyun Lee, Woo Sun Kim, Yeon Jin Cho, Jae Won Choi, Ji Young Ha, Young Hun Choi, Jung Eun Cheon, and Seul Bi Lee
- Subjects
Male ,Contrast enhancement ,Wilcoxon signed-rank test ,Science ,media_common.quotation_subject ,Computed tomography ,Signal-To-Noise Ratio ,Article ,Deep Learning ,Similarity (network science) ,Image Processing, Computer-Assisted ,Medicine ,Contrast (vision) ,Humans ,Tomography ,media_common ,Aged ,Retrospective Studies ,Multidisciplinary ,medicine.diagnostic_test ,business.industry ,Technical evaluation ,Mediastinum ,Middle Aged ,Test set ,Female ,Radiography, Thoracic ,Lymph Nodes ,Supervised Machine Learning ,Medical imaging ,Nuclear medicine ,business ,Tomography, X-Ray Computed ,Generative adversarial network - Abstract
This study aimed to evaluate a deep learning model for generating synthetic contrast-enhanced CT (sCECT) from non-contrast chest CT (NCCT). A deep learning model was applied to generate sCECT from NCCT. We collected three separate data sets, the development set (n = 25) for model training and tuning, test set 1 (n = 25) for technical evaluation, and test set 2 (n = 12) for clinical utility evaluation. In test set 1, image similarity metrics were calculated. In test set 2, the lesion contrast-to-noise ratio of the mediastinal lymph nodes was measured, and an observer study was conducted to compare lesion conspicuity. Comparisons were performed using the paired t-test or Wilcoxon signed-rank test. In test set 1, sCECT showed a lower mean absolute error (41.72 vs 48.74; P P P P P P ≤ .001). Synthetic CECT generated from NCCT improves the depiction of mediastinal lymph nodes.
- Published
- 2021
41. Technical evaluation of remote laboratories in an engineering educational network.
- Author
-
German-Sallo, Zoltan, Grif, Horatiu-Stefan, and Gligor, Adrian
- Subjects
ENGINEERING education ,EDUCATIONAL evaluation ,MOBILE learning ,DISTANCE education research ,EDUCATIONAL standards research - Abstract
This work describes an Engineering Educational Network based on remote labs and proposes a methodology to perform a technical evaluation of this network. The educational network is located in the Maghrebian countries, Morocco, Tunisia and Algeria. The proposed technical evaluation strategy is build starting from international specific standards as ISO/IEC 25010:2011 and is focused on functional suitability and its three components, functional completeness, functional correctness and functional appropriateness. This work is carried out within the framework of the European Tempus IV project called "eSience" and sixteen partners from seven different countries are involved. [ABSTRACT FROM AUTHOR]
- Published
- 2015
- Full Text
- View/download PDF
42. E-LEARNING TOOLS FOR TEACHING CLOTHING PATTERN DESIGN.
- Author
-
AVĂDANEI, Manuela, IONESCU, Irina, IONESI, Savin-Dorin, and DULGHERIU, Ionuţ
- Subjects
MACHINE learning ,CLOTHING & dress ,TEXTILE industry ,PATTERN design (Clothing) ,THREE-dimensional imaging ,COMPUTER simulation - Abstract
In the clothing and textile industry, a business is characterized by dynamism because of the materials, technologies, fashion trends, consumer's level of education, financial resources, equipment, etc. In this "world", the engineer is the one who can transform a sketch, a photo, or a video image into reality, in what a consumer needs, wants or must have. Our goal is to teach, educate and form engineers who can rapidly answer and solve different technical problems. We also need to train the student to develop a real 3D image about the final product, what it really looks like on the human body or in the environment, starting from its 2D stage. For this purpose, with screen software, we make demonstrative tutorials (courses and practical themes) in which there are shown different design stages needed to follow to get the model pieces. The final stage, the simulation in the 3D virtual environment of the product on the mannequins offers to the student the needed instruments to understand and evaluate the technical problems of the chosen design solution and which is the influence on the final aspect (shape and dimension). We can create groups of discussion to analyse different solutions (if there are good or not, suitable or indicated according to the final purpose) and the students can exchange ideas, information or suggestions from one to another about the proposed subject. With such support in education and training, we offer to the student all the needed instruments to understand the theoretical technical information, its connections and implications in the garment final shape and size. [ABSTRACT FROM AUTHOR]
- Published
- 2014
- Full Text
- View/download PDF
43. Licensing, technical and economical evaluation of small hydro power plants in Greece
- Author
-
Iakovakis, Dimitris, Δαγούμας, Αθανάσιος, Dagoumas, Athanasios, Σχολή Οικονομικών, Επιχειρηματικών και Διεθνών Σπουδών. Τμήμα Διεθνών και Ευρωπαϊκών Σπουδών, and Ενέργεια: Στρατηγική, Δίκαιο & Οικονομία
- Subjects
Licensing ,Hydro plant ,Technical evaluation - Abstract
Αδειοδοτική, τεχνική και οικονομική αξιολόγηση ενός Μικρού Υδροηλεκτρικού Σταθμού στην Ελλάδα Σύγκριση αδειοδοτικής διαδικασίας μεταξύ Ελλάδας και χωρών της Ευρώπης, The current dissertation is about the techno - economical evaluation of a Small Hydroelectric Power Plant (< 10MW) in Greece. It aims at identifying all steps of the licensing procedure of α Small Hydro Power Plant. Furthermore this thesis can be used as a model for the licensing and technical evaluation study of a Hydro Plant in Greece. Besides there is a gap of such bibliography in the country. The outcome of the study will provide also information that can be used for deciding to bid or not for the purchase of an SHPP and what a profitable price could be. Furthermore, this thesis proves that the technical part of the operation of a hydro plant and more specifically its operational efficiency is not a priority for many Hydropower producers in the country.
- Published
- 2021
- Full Text
- View/download PDF
44. Optical Whole-Genome Restriction Mapping as a Tool for Rapidly Distinguishing and Identifying Bacterial Contaminants in Clinical Samples
- Author
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Richard R. Chapleau and James C. Baldwin
- Subjects
assay development ,bacterial detection ,genome identification ,technical evaluation ,whole genome mapping ,Medicine - Abstract
Introduction: Optical restriction genome mapping is a technology in which a genome is linearized on a surface and digested with specific restriction enzymes, giving an arrangement of the genome with gaps whose order and size are unique for a given organism. Current applications of this technology include assisting with the correct scaffolding and ordering of genomes in conjunction with whole-genome sequencing, observation of genetic drift and evolution using comparative genomics and epidemiological monitoring of the spread of infections. Here, we investigated the suitability of genome mapping for use in clinical labs as a potential diagnostic tool. Materials and Methods: Using whole genome mapping, we investigated the basic performance of the technology for identifying two bacteria of interest for food-safety (Lactobacilli spp. and Enterohemorrhagic Escherichia coli). We further evaluated the performance for identifying multiple organisms from both simple and complex mixtures. Results: We were able to successfully generate optical restriction maps of four Lactobacillus species as well as a strain of Enterohemorrhagic Escherichia coli from within a mixed solution, each distinguished using a common compatible restriction enzyme. Finally, we demonstrated that optical restriction maps were successfully obtained and the correct organism identified within a clinical matrix. Conclusion: With additional development, whole genome mapping may be a useful clinical tool for rapid invitro diagnostics.
- Published
- 2015
- Full Text
- View/download PDF
45. Framework for Technical Evaluation of Decision Support Systems Based on Water Smart Metering: The iWIDGET Case.
- Author
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Ribeiro, Rita, Loureiro, Dália, Barateiro, José, Smith, Joanne R., Rebelo, Margarida, Kossieris, Panagiotis, Gerakopoulou, Patricia, Makropoulos, Christos, Vieira, Paula, and Mansfield, Lesley
- Subjects
WATER meters ,DECISION support systems ,WATER consumption ,FEATURE extraction ,WATER utilities - Abstract
Water smart metering enables the measurement and reporting of water consumption at sub-daily intervals. However, assuming that increased availability of consumption information will necessarily result in changed behaviour is simplistic. The main scientific challenges for iWIDGET project are the management and extraction of useful information from vast amounts of high-resolution consumption data, the development of customized information to influence awareness and support behavioral change, and the integration of iWIDGET concepts into a set of decision-support tools for water utilities and consumers. In this paper, it is described the evaluation general framework, the iWIDGET system's technical evaluation system and stakeholders involved. [ABSTRACT FROM AUTHOR]
- Published
- 2015
- Full Text
- View/download PDF
46. EVALUATION OF CLEAN COAL TECHNOLOGIES IN CHINA: BASED ON ROUGH SET THEORY.
- Author
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Xingyuan Wang, Fan Jia, and Yutao Wang
- Subjects
CLEAN coal technologies ,ROUGH sets ,AIR pollution ,COAL industry & the environment ,ENERGY consumption ,ENERGY conversion - Abstract
It is undeniable that coal is still the main resource for production and consumption in China and will likely remain so in the coming decades. This paper proposes a new method based on rough set theory to effectively evaluate clean coal technology (CCT). Firstly a rough-set information system is built after the filtration of CCT evaluation indexes, and then we discuss the calculations of the weight of every index and evaluation result for each technology. This new method reduces the correlation among different attributes, which makes the results more precise. This data collection approach improves reliability and rationality of evaluation. The results highlight advantages and defects in each technology. This will guide entrepreneurs and scholars to improve Chinese CCT. [ABSTRACT FROM AUTHOR]
- Published
- 2015
- Full Text
- View/download PDF
47. Role of Renewable Energy Sources in Evaluating Technical and Economic Efficiency of Power Quality
- Author
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Ghiasi, Mohammad, Esmaeilnamazi, Sheyda, Ghiasi, Ramin, and Fathi, Mohammadreza
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- 2020
- Full Text
- View/download PDF
48. Lidars for vehicles: from the requirements to the technical evaluation
- Author
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Dai, Zhuoqun, Li, Yang, Sundermeier, Max Caspar, Grabe, Tobias, and Lachmayer, Roland
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Lidar ,ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION ,Requirements ,Review ,Dewey Decimal Classification::600 | Technik ,ADAS ,Technical evaluation ,Autonomes Fahren ,Fahrerassistenzsystem ,Autonomous driving ,Anforderungen ,ddc:600 ,Technische Bewertung ,Konferenzschrift - Abstract
— ADAS (Advanced Driver Assistance Systems) is a collective term of vehicle mounted sensors and devices aiming to improve traffic safety and realize high-level autonomous driving. Lidar systems are considered an indispensable part of ADAS to complement the other sensors like cameras and Radar. They realize these complements by providing a real-time high-resolution 3D representation of the environment of the vehicle, in which the positional information of each object area is included so that obstacles and potential hazards can be detected in advance by the ADAS. For this purpose, a Lidar must have the reliability of continuous work and provide the information accurately. In this paper, the requirements of Lidar systems in ADAS are firstly figured out by comparing them with other sensors applied in vehicles. Afterward, different types of Lidar systems regarding traffic safety and driver assistance are presented according to the stated Lidar function and driving condition on the road. Apart from the requirements, different working principles of Lidar products on the market are reviewed according to their scanning methods. Furthermore the results of this review are summed up in a technical evaluation to show the applicability of specific Lidar designs with respect to the requirements of vehicle applications.
- Published
- 2021
49. NON-DESTRUCTIVE MONITORING AND TECHNICAL EVALUATION CONDITIONS OF THE MONUMENT ALEXANDER III
- Author
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Igor Pavlov, Anatolii Potapov, and Iana Verkhovskaia
- Subjects
Non-destructive control methods ,Engineering ,flaw detection ,business.industry ,Technical evaluation ,cultural and architectural monuments ,Building and Construction ,Construction engineering ,Cultural heritage ,Mechanics of Materials ,preservation of cultural heritage ,Non destructive ,Technical analysis ,Architecture ,lcsh:Architecture ,business ,lcsh:NA1-9428 - Abstract
The article presents the methods of non-destructive testing and evaluation of monuments of cultural heritage, verified by the example of technical analysis of the structure and the defective condition of the monument to Alexander III (St. Petersburg). The methodology includes a set of scientific and technical activities and consists of several blocks of analysis of the composition of materials and design features: visual-optical, capillary, acoustic-ultrasonic, acoustic-ultrasonic pulsed, thermal-imaging, X-ray fluorescence and metallographic. The main results are the assessment of the technical condition of the monument to Alexander III, contributing to the development of restoration activities and conservation. The practical significance of the work is the accumulation of data about the structure and material of the monument, the development of recommendations for further research and restoration activities of similar objects of historical, cultural, and architectural value.
- Published
- 2019
50. Use of simulator for EUS training in the diagnosis of pancreatobiliary diseases
- Author
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Fang Jun, Dong Wang, Zhendong Jin, Zhao-Shen Li, and Jie Gao
- Subjects
simulator ,training ,Hepatology ,business.industry ,Training system ,education ,Gastroenterology ,Technical evaluation ,Clinical Practice ,03 medical and health sciences ,0302 clinical medicine ,030220 oncology & carcinogenesis ,Test score ,Diagnosis ,Medicine ,pancreatobiliary system ,030211 gastroenterology & hepatology ,Radiology, Nuclear Medicine and imaging ,Original Article ,business ,Training program ,Simulation ,EUS - Abstract
Background and Objectives: EUS has been widely used in the diagnosis of pancreatobiliary diseases. However, improvements in the conventional training pattern of EUS are needed urgently. In this study, we compared the results achieved after use of clinical practice training patterns combined with or without simulator training and evaluated the effectiveness of simulator use in EUS training. Subjects and Methods: The trainees were randomly divided into two groups: the experimental group was trained with both clinical practice and simulator training system and the control group was only trained through clinical practice. After 1 month of training, trainees of both groups were tested with an established technical evaluation procedure that aimed to assess trainees’ ability to examine the normal anatomical structure. Then, trainees in the experimental group completed a questionnaire. Results: The mean test score of the experimental group (64.53 ± 4.91) was significantly greater than that of the control group (60.09 ± 5.49; P = 0.028). Moreover, the individual test score of trainees in the experimental group was positively correlated with the frequency of simulator use (P = 0.242). Conclusion: Simulator training can promote trainees’ ability to evaluate the normal anatomical structure, and thus, can improve the efficiency of the EUS training program.
- Published
- 2019
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