Decreasing NOx Emissions by Way of the Staged Fuel Combustion

The purpose of this scientific paper was to analyze the mathematical model built for the staged arrangement of the fuel combustion system and calculate the formation of nitrogen oxides throughout the boiler furnace height for the different distributions of thermal loadings along the full vertical extent of the combustion chamber. The obtained results enable the determination of the overall amount of nitrogen oxides formed in the boiler and it allows us to provide appropriate ecological indices for the boiler when regulating the air concentration in the burner rows. In practice, to suppress the formation of nitrogen oxides we often use such basic methods as low-toxic burners, staged fuel combustion, flue gas recirculation, etc. The analysis of the computations done allows us to draw a conclusion that the operation of the boiler with ecological indices that satisfy standard values of the European Directive 2010/75/EU is only possible for the load below 40 %. After reconstruction of the burner system and adjustment of the air supply system with the observation of above ecological norms the boiler power can be increased up to 80 % using the staged fuel burning with the ensurance of environmental performances during its operation. Computational and experimental data errors varied in the range of 8 % to 12 %. With the increase in the overall chemical incomplete combustion by 40 % to 60 % (q3) these losses are compensated by a decrease in absolute losses due to the boiler aggregate load and the losses through external walls (q5) due to an increase in the boiler power.

Mastery of Technological Pedagogical And Content Knowledge (TPACK) Prospective Teacher In ICT Expertise Brawijaya University

The Information Technology Education (ITE) study program, Faculty of Computer Science, Universitas Brawijaya requires its students to take part in Pengenalan Lapangan Persekolahan (PLP) 2 according to Permenristekdikti No. 55 of 2017 in order to be able to produce prospective teachers who have the competence of educators. This study describes the gap in mastery of competencies with the TPACK framework based on the results of PLP 2 activities which are compared with standard values using a discrepancy evaluation model. The results of the gap are mapped using the method Importance Performance Analysis (IPA) to determine the priority scale for improvement of variables according to positions in certain quadrants. Through the IPA method, the variables that are prioritized to improve their mastery are TPK and PCK because they have very small gaps. Recommendations are given for the TPK variable to be given a pretest and posttest on the material for preparing teaching tools and training in the preparation of lesson plans. For the PCK variable, should be given pretest and posttest to the study material for theoretical and practical learning scenarios, the activities are needed lesson study which is carried out at least twice.

Body Composition, Dietary Intake and Biochemical Profile in Thalassemia Major Patients, Southwest of Iran

Background: Thalassemia, as an autosomal recessive disorder, leads to life-threatening anemia, in which patient's life depends on long term blood transfusion and regular medical care. In this study, body composition, nutritional intake and biochemical parameters of blood transfusing dependent major thalassemia patients were evaluated.Methods: In this cross-sectional study, 74 major thalassemia volunteers referred to educational hospital in Yasuj city were recruited. Body composition, demographic and biochemical parameters were measured. Data were statistically analyzed using parametric and non-parametric statistical tests. P-values less than 0.05 were defined as statistically significant.Results: Data analysis showed that mean of age of participants in this cross-sectional study was 21.09± 7.7 years old. 21.6% of our patients were underweight, 68.9% of them were normal weight, 9.5% were overweight and none of them were obese. 8.1% of < 20 years old patients were short stature. About 80% of patients had low blood HDL concentration. About 30% of participants were at borderline levels ​and 42% of patients were at high and toxic levels of Ferritin. Approximately, all patients had hemoglobin lower than standard of healthy individuals. The mean body fat percent of patients was 24 ± 6.6%, which was higher than the normal value ​​(P <0.001), with exception of copper, phosphorus and vitamin K and percent of protein and carbohydrates from total energy were significantly lower than standard values. The Binary logistic regression analysis also showed that the interval between sessions of blood transfusion (P=0.03), daily intake of vitamin D (P=0.01) and vitamin K (P=0.028) and fatness (0.006) were significant predictors of the Ferritin equation as iron overload in thalassemia patients.Discussion and Conclusion: Malnutrition, especially underweight was evident among our patients. Intake of the energy and most nutrients were lower than standard values. Biochemical parameters such as Ferritin and hemoglobin were also abnormal. Blood levels of vitamin D in thalassemia patients should be routinely monitored. Clinical trials on the effect of supplementation with nutrients such as vitamin D and calcium and zinc are recommended. Blood levels of vitamin D in thalassemia patients should be routinely monitored every six months.

CALCULATION OF THE TEMPERATURES OF THE CHEMICAL REACTIONS OF THE IRON STEPPED RECOVERY FROM HEMATITE WITH CO GAS AND GASIFICATION OF SOLID CARBON ACCORDING EXISTING FORMULAS AND BY STANDARD VALUES OF ENTHALPY AND ENTROPY OF SUBSTANCES

The article presents the results of a thermodynamic assessment of the possibility of chemical reactions of the stepped recovery of iron from hematite with a recovering gas CO, as well as the Bell-Boudoir chemical reaction. It has been established that for each of the indicated chemical reactions there is a certain temperature (called by the author as "boundary temperature"), up to or above which CO gas cannot be a recovering agent for lower iron oxide from higher or the metallic iron itself from wustite, as well as gasification of solid carbon; while the recovery of Fe3O4 from Fe2O3 is theoretically possible at any temperatures above 0 ° C, the recovery of FeO from Fe3O4 and the gasification of solid carbon are theoretically possible above certain temperatures (i.e. at elevated and high temperatures), and the recovery of iron from FeO is below a certain temperature (i.e. at low temperatures). The numerical values of the boundary temperatures for the reactions of iron recovery and its lower oxides, as well as the reaction of gasification of solid carbon are given; graphical dependences of the Gibbs free energy of the indicated chemical reactions on temperature are made according to the equations available in metallurgical literary sources, and according to the expressions derived in the article by the author.

RESEARCH OF THE EFFICIENCY OF THE GRAIN RECEPTION LINE OPERATION FROM AUTO TRANSPORT AT THE PROCUREMENT PRODUCTION GRAIN ELEVATOR

The results of the study of the characteristics of the technological line for grain reception from auto transport at the procurement production grain elevator of LLC ―Agricultural Enterprise ―Vesna 21‖ are presented. In the process of research, the quantitative and qualitative composition, volumes and duration of the harvesting periods of early and late crops, the quantitative and qualitative composition and characteristics of auto transport delivering grain to the enterprise were determined; the most intensive supply of early and late crops, as well as the actual coefficients of daily irregularity of their supply by auto transport.It is shown that the enterprise in 2017-2019 traditionally received such early crops as wheat of 2-6 classes and rapeseed of the highest and 1st class. Late crops were represented by corn (3rd class and non-class) and soybeans (non-standard and extruded). The volumes of harvesting of the corn and wheat (main crops)for the indicated years correlated, respectively (%) 49.2:41.2; 60.1: 24.9 and 66.1:17.1, which indicates a tendency for a significant increase in the supply of late crops, especially corn grain. The ratio between early and late crops for 2017–2019 was 45:55, 24:76 and 20:80, respectively (%).The monthly grain flow to the grain elevator was rather irregular. Most of the grain was received from July to December, when the periods of harvesting of early and late crops coincide, and especially in the autumn months, in September, October and November, up to 32.9 %, less – in the off-season from January to June, to 12.3 %. All the same, a lot of grain in percentage terms was received in November 2017 and October 2018 – 32.9 % each.An analysis of the quantitative and qualitative composition of cars that delivered grain to the procurement and production elevator in 2017-2019 showed that the carrying capacity of the vehicles ranged from 3 ... 51 tons. In 2017, 80.9% of all grain received by the enterprise was delivered by 2771 vehicles (cars) with a carrying capacity of 20 ... 40 tons, which amounted to 82.4 % of their annual quantity. In 2018, these indicators were as follows – 87.2 % of grain was delivered by 84.5% of vehicles of the same carrying capacity, and in 2019 – 93.4 % of grain was delivered by 93.0 % of the same vehicles. In the years studied, there was a tendency to an increase in the share of more heavy-duty vehicles (35...40 t). However, the number of vehicles with a carrying capacity of more than 40 tons, delivering significant volumes of grain, has significantly decreased, which is associated with the legislative limitation of the vehicles weight. The optimal carrying capacity in terms of the ratio of the mass of the delivered grain: the number of vehicles, taking into account legal restrictions, can be recommended 35...40 tons.The main characteristics of the reception of an early and late crops at the procurement and production elevator, respectively, for 2017-2018 were the following values: the duration of the arrival of early crops, days - 126, 119 and 97, late – 142, 145 and 240; harvesting period of early crops, days – 73, 88 and 68, late crops – 86, 78 and 57; the most intensive supply of early crops, t/day – 8378, 596 and 1428, late crops 1966, 1576 and 1909; actual coefficients of grain reception irregularity by auto transport of early crops – 6.3; 2.2 and 3.6, late – 2.5, 2.4 and 2.9, which exceeds the standard values of 1.6 and should be taken into account when improving the operation of the grain reception line.

BCR-ABL1 (p210) Transcript Kinetics

Context.— Delta checks are a powerful technique for monitoring clinical assays in many disciplines but have not been routinely used in molecular testing. Objective.— To determine if the biologically determined kinetics of BCR-ABL1's rise and fall could allow the development of a delta check in BCR-ABL1 testing. Design.— Nine years of BCR-ABL1 p210 results were evaluated and patients with 3 or more results were selected for inclusion. The kinetics of these percentages of international standard values were plotted against time along with the median and the 90th and 95th percentile lines. A Monte Carlo simulation of a batch mix-up was performed for 6 months of data to determine the efficacy of the proposed cutoff. Results.— The median kinetics showed a 1-log drop of the percentage of international standard in 90 days, with less than 5% of cases showing faster than a 2-log drop in 90 days, and less than 2.5% showing a faster than 3-log drop in 90 days (extrapolated to 1 log in 30 days). The Monte Carlo simulation of a batch mix-up showed that an average batch mix-up of 23 samples could routinely be flagged by this cutoff, albeit with wide variance. Conclusions.— These results suggest that using a drop in the percentage of international standard of greater than 1 log in 30 days can be a useful trigger in implementing a delta-check system for this molecular test.

Using Spatial Analysis Methods to Evaluate the Soil Contamination of Baghdad City, Iraq

The current study aims to identify soil pollutants from heavy metals The study utilized 40 topsoil (5 cm) samples, which adapted and divided into seven regions lies in Baghdad governorate, included (Al-Husainya,(Hs) Al-Doura (Do), Sharie Al-Matar (SM), Al-Waziria (Wz), Nharawan (Nh), Abu Ghraib (Abu) and Al-Mahmoodyia (Mh)). Spatial distribution maps of Nickel (Ni), Manganese (Mn), Lead (Pb) and Zinc (Zn) were created for Baghdad city using Geographic Information Systems (GIS). The concentrations of four heavy metals in the soil of different area of Baghdad were measured and observed using XRF instrument. The result found highest values of Pb and Zn at the middle of the Baghdad in (Wz) area and it reached to 35110 and 720 ppm respectively which exceeded allowed limits values. . While the measurements of the Mn and Ni recorded highest values in (Do) area and reached to 1020 and 170ppm respectively and was within the allowed limits of standard values of soil contamination. The prediction maps of Zn, Pb showed high accumulations in the center and western part of Baghdad city. While the maps of the elements of Mn, Ni showed low accumulations in the eastern and southern part of Baghdad. By using prediction models through which pollution levels can be determination in areas unsampled, which contributes in economic benefits, such as decrease of the required amount of samples in any project, decrease cost of analyzing and using friendly tools. The methodologies incorporated with GIS helps to give a clear picture for decision-makers to take the necessary treatments for polluted areas.

Design and research on intelligent ventilation system of ship cargo hold

Ventilation in the cargo hold of ships, which can adjust the temperature and humidity in the cargo hold, is a necessary measure to ensure the safety of maritime cargo. Traditional ship cargo hold ventilation includes natural ventilation and mechanical ventilation. Its ventilation effect is limited, which often leads to cargo damage accidents such as mildew of the cargo in the cabin. Based on the research of intelligent cargo hold ventilation technology, this paper proposes a design scheme of ship cargo hold ventilation system. The ventilation system includes a system platform and electrical connection elements supported by the system platform. Among them, the system platform is electrically connected to the concentrator, the concentrator is electrically connected to several collectors and electric control devices, the collector is electrically connected to several collection nodes, and the electric control device is electrically connected to the ventilation device. The collection nodes of the ventilation system, including temperature and humidity sensors, air pressure sensors, and wind speed and direction sensors, are installed in the cargo hold of the ship. The collection nodes are evenly distributed in multiple locations in the cargo hold of the ship, effectively monitoring the temperature, humidity, air pressure, wind speed and direction of the cargo hold of the ship, and transmitting it to the system platform through collectors and concentrators to realize real-time monitoring. According to the setting of different environmental standard values, it can automatically complete the startup, shutdown and reverse operation of the wind turbines in different positions, making the system more accurate in monitoring the environment of the ship’s cargo hold, effectively reducing cargo damage, ensuring the safety and economy of maritime freight, and It can more effectively save energy, reduce carbon emissions, protect the environment, and make the system more practical.

Employee Assessment Applications Using the Graphic Rating Scale and Profile Matching Methods at XYZ University

Performance appraisal is an evaluation and assessment carried out to employees to find out what their abilities are and measure productivity during work. XYZ University has an employee performance appraisal which is conducted annually to determine employee promotions. The assessment process is still using the manual method and using the Graphic Rating Scale method. Graphic Rating Scale is a performance appraisal method in which an employee is assessed based on criteria that are considered important and relevant to performance and productivity. To determine a promotion, the Graphic Rating Scale method cannot do it because it takes standard values, core factors and secondary factors that are used as standards to determine promotions. Therefore, In this employee appraisal application there is a combined method used to assist the assessment process, namely the Graphic Rating Scale method and the Profile Matching method. The Profile Matching method is used because there are standard values, core factors and secondary factors that can be used as standards to determine promotions. The results of this study are on testing the Graphic Rating Scale method with the combined method of Graphic Rating Scale and Profile Matching, the combined method of Graphic Rating Scale and Profile Matching has a higher average accuracy of 78,18%, while the Graphic Rating Scale method has an average accuracy of 68,45%.