Basic Limit Research Articles

Source Term Derivation and Radioactive Release Evaluation for JRTR Research Reactor under Severe Accident

The source term for the JRTR research reactor is derived under an assumed hypothetical severe accident resulting in generation of the most severe consequences. The reactor core is modeled based on the reactor technical design specifications, and the fission products inventory is calculated by using the SCALE/TRITON depletion sequence to perform burnup and decay analyses via coupling the NEWT 2-D transport lattice code to the ORIGEN-S fuel depletion code. Fifty radioisotopes contributed to the evaluation, resulting in a source term of 3.7 × 1014 Bq. Atmospheric dispersion was evaluated using the Gaussian plume model via the HOTSPOT code. The plume centerline total effective dose (TED) was found to exceed the IAEA limits for occupational exposure of 0.02 Sv; the results showed that the maximum dose is 200 Sv within 200 m from the reactor, under all the weather stability classes, after which it starts to decrease with distance, reaching 0.1 Sv at 1 km from the reactor. The radiation dose plume centerlines continue to the exceed international basic safety standards annual limit of 1 mSv for public exposure, up to 80 km from the reactor.

RESULTS OF WBC/MONITORING OF FIREFIGHTERS PARTICIPATING IN RESPONSE TO CHORNOBYL FOREST FIRES IN APRIL–MAY 2020

Objective.of this study was to determine the levels of radionuclides in the rescuers’ bodies of the SES during firefighting in the exclusion zone of the Chornobyl nuclear power plant and to assess the dose of internal radiation due to this receipt. Materials and methods. From 06.04.2020 to 19.05.2020 in the State Institution «National Research Center for Radiation Medicine of the National Academy of Medical Sciences of Ukraine» (NRCRM) measurements of the content of incorporated gamma radionuclides on whole body counters (WBC) operational class «Screener-3M» (Minimum detected activity (MDA) is 300–500 Bq for 5 minutes of measurement at 137Cs) and expert high-sensitivity WBC (MDA is 20 Bq for 10 minutes of measurement at 137Cs). 470 people (523 measurements) in three groups of personnel of the SES of Ukraine who took part in the forest fire liquidation in the exclusion zone in the period from April 4 to May 5, 2020 were examined. Mathematical and spectrometric methods are used in the work. Results and conclusions. In the vast majority (95 %) of the personnel of the SES of Ukraine, examined at the WBC operational class «Screener-3M» (more than 500 measurements), the assessment of the values of the individual effective dose of internal radiation due to 137Cs in the body during firefighting, assuming that it receipt occurred during operation in the exclusion zone, did not exceed the minimum dose detected by MDD (5–14 μSv). The average value of the effective dose of internal radiation in the group of personnel of the State Emergency Service of Ukraine in Kyiv, which participated in the elimination of forest fires in the exclusion zone from April 4 to May 5, 2020 (26 people) studied at the expert WBC, is 2.5 ± 1.1 μSv, in the group of personnel of the SES of Ukraine in Cherkasy region, which participated in the fire on April 19–24, 2020 (9 people) – 2.2 ± 0.6 μSv, in the group of personnel of the SES of Ukraine in the Kyiv region, which took part in the elimination of the forest fire in the exclusion zone on April 4 – May 5, 2020 (42 people) – 4.4 ± 2.4 μSv. Maximum values of 5.1 μSv, 3.5 μSv, 11.8 μSv in the groups of Kyiv city, Cherkasy and Kyiv regions, respectively, which is much lower than the basic dose limit for the population from man-made sources of 1000 μSv · year-1 according to the Law of Ukraine about protection of the person against influence of ionizing radiation. Key words: forest fire, Chornobyl Exclusion Zone, internal irradiation, whole body counters, 137Сs.

Detection of Unhealthy Plant Leaves using Image Processing with Arduino

India is a cultivating country and as for seventy percentage of our people depends upon agribusiness. Third of our national compensation starts from agribusiness. Along these lines the illness disclosure of plants expects a critical activity inside the agricultural field. Larger piece of the plant contaminations are realized by the attack of bacterium, parasites, disease, etc. In the occasion that correct consideration isn't taken during this space, it should cause real impacts on plants and unfairly impacts the productivity and quality. To perceive, the plant ailments we'd like a snappy modified techniques. The most approach grasped in seek after for area and unmistakable verification of plant contaminations is eye observation through stars. the basic leadership limit of AN informed conjointly depends upon his/her adequacy, like exhaustion and vision, work weight air, etc subsequently this technique is time outstanding and more expensive. Here an endeavor is masterminded with a thought of police work plant diseases abuse picture process. Picture methodology instrument chest of Matlab is used for evaluating affected space of infection and to see the capability inside the shade of the illness impacted space. This idea may be loosened up to find the reactions of any variety of plant ailments that is affected on absolutely remarkable horticulture crops. The algorithmic rule may be wont to arrange the leaves and the gathered outcomes are detached abuse Arduino basically based vehicle system This decreases an essential task of watching of farms crops at starting period itself to find the sign of sicknesses show up on plant leaves.

HYGIENIC ASSESSMENT OF X-RAY AND LASER RADIATION AT SURGEONS’ WORKPLACES

Introduction. Modern surgery is a complex, multifaceted area of medicine that plays an important role in the struggle for health, working capacity and human life. In recent years, in surgery, much attention has been paid to the improvement and development of new surgical equipment, including that based on ionizing and non-ionizing radiation, its application range being widened, which allows patients being provided with high-tech and less traumatic procedures. However, the use of such equipment resulted in the appearance of new adverse occupational factors of ionizing and non-ionizing nature at the workplaces of surgical team members, which can have a negative effect on the personnel. Material and methods. Data of x-ray and laser radiation level studies at the workplaces of medical personnel in modern operating rooms are reported. Results. Total normalized power of the effective x-ray dose during the use of x-ray surgical unit at the workplaces of surgical teams in most cases was revealed not to exceed allowable dose rate, while in the process of certain procedures, such as vessel embolization, it can exceed allowable levels. The total annual effective radiation exposure dose of x-ray surgery teams depends on the number of performed operations, their type, complexity, and can exceed a basic radiation dose limit for A and B group personnel. The intensity of diffusely reflected laser radiation at workplaces of surgeons can significantly exceed maximum allowable levels, sometimes up to 600 times. Discussion. Considering an ever-gaining use of high-tech equipment generating laser and X-ray radiation and increasing number of exposed medical personnel, hygienic assessment of these radiation levels at workplaces of surgical team members and development of measures to improve working conditions is an important issue for maintaining workers’ health. Conclusion. To assess the occupational risk degree to the health of surgeons it is necessary to conduct in-depth studies of their health status.

Microbiological and chemical quality of different types of salted pearl mullet (Chalcalburnus tarichi Pallas, 1811)

AbstractThis research aimed to determine microbiological and chemical quality of different types of salted pearl mullet (Chalcalburnus tarichi Pallas, 1811). Samples of salted pearl mullet (C. tarichi Pallas, 1811), produced by six different methods, were obtained from three different local producers at the end of the hunting season of 2016 and 2017 (May–June) with wooden boxes, plastic cans, or in bottom perforated plastic cans. Samples stored in a cold storage (2 ± 2°C) were analyzed in August and September of 2017. Six fish were used in each sampling day and thus the analyses were completed in 18 days. So, 108 fish samples were analyzed (3 producer × 6 method × 3 sample for each method × 2 hunting season). Analysis results were calculated as mean ± SD. One‐way analysis of variance was used to determine whether there was a significant difference between the sample groups analyzed, and p < .05 was considered significant. All sample groups were found to be appropriate according to total mesophilic aerobic bacteria count, but one sample group (OS11‐old sample, gutted and cleaned fish producted in wooden box according to method 1) included Salmonella spp. and Vibrio parahaemolyticus, it was found to be inappropriate (p < .05). The total volatile basic nitrogen acceptability upper limit (25–30 mg/100 g) were found to be exceeded in three sample groups (OS12‐old sample, ungutted, and uncleaned fish producted in wooden box according to method 1, OS31‐old sample, gutted, and cleaned fish producted in bottom perforated plastic can according to method 3, OS32‐old sample, ungutted, and uncleaned fish producted in bottom perforated plastic can according to method 3) (p < .05) and the tiobarbituric acid index value was found to vary between 13.32 ± 0.08 and 31.43 ± 0.04 μg malondialdehyde/g (p < .05). According to histamine results, all sample groups were determined at acceptable values (p > .05). However, it was determined that the salt amount of the sample groups was very high in raw, and that more than half of the salt amount remained in the samples, even after baked waiting for 3 hr in warm water (p < .05).

THE IMPACT OF TRADE LIBERALIZATION OF BOSNIA AND HERZEGOVINA’S EXPORT TO EUROPEAN UNION

One of the basic and strategic goals of post-war Bosnia and Herzegovina is a full membership in the European Union. During 1992-1995, Bosnia and Herzegovina has passed through one of the most difficult periods in its’ history. The war has completely devastated the economical structure and the aftermaths were visible in the following years. As a new paradigm, the European Union appears. The European Union has helped the Western Balkans countries to overcome national tensions and offered them a new perspective; new regional and european integrations should be a new, historical chance for them. In the light of this, the focus of this paper is the impact of trade liberalization between the European Union and Bosnia and Herzegovina on the export from Bosnia and Herzegovina to European Union. The above mentioned impact has been observed in the period of eleven years. The total export amount of Bosnia and Herzegovina in 2015 was 4,6 billion euros, while the amount of the import was 8,1 billion euros, which makes nearly 60% in favor of import. Traditionally, Bosnia and Herzegovina’s most important foreign trade partner is the European Union where Bosnia and Herzegovina has a deficit in foreign trade. The portion of export to EU during 2015 was 71,79% while the portion of import was 60,85%. The coverage of import over export was 66,89%. In the period of 2005-2015, most of the products have been placed to markets in Croatia, Germany, Italy, and Serbia, which is not the EU member. The process of trade liberalization in 2015 has resulted in surplus of trade with certain EU countries; Austria, Luxembourg and Estonia while the decrease in trade has been recorded with Germany, Slovenia and Czech Republic. Regarding the export, Bosnia and Herzegovina mailny places products which have labour-intensive character. In the econometrics analysis, extented gravitational models of trade have been placed. Besides the abovementioned, the following econometrical techinques have been used: panel data models (PD), fixed effecs models (RE) and panel corrected standard errors (PCSE). In addition, Hausman test has been applied. According to the analysis that has been carried out, the following has been concluded; InGDPi, InGDPj and InDISTij variables are statistically important on the level of 5% in the period of gradual liberalization. The SSP1 an EK variables are not siginificant.In the other moder, in the period of complete liberalization InGDPi, InGDPj and SSP2 variables have a significant impact on a dependent variable on a level of 5%. InDISTij and EK variables have a significant impact on a level od 5% as well. The above mentioned result confirm the research hypothesis; trade liberalization has a significant impact on the export of Bosnia and Herzegovina to the EU. The basic limit of this research can be a relatively short observation period, caused by the fact that the data of merchandise trade between Bosnia and Herzegovina and EU countries until 2005 are not accessible.

Sieve bootstrap for functional time series

A bootstrap procedure for functional time series is proposed which exploits a general vector autoregressive representation of the time series of Fourier coefficients appearing in the Karhunen–Loeve expansion of the functional process. A double sieve-type bootstrap method is developed, which avoids the estimation of process operators and generates functional pseudo-time series that appropriately mimics the dependence structure of the functional time series at hand. The method uses a finite set of functional principal components to capture the essential driving parts of the infinite dimensional process and a finite order vector autoregressive process to imitate the temporal dependence structure of the corresponding vector time series of Fourier coefficients. By allowing the number of functional principal components as well as the autoregressive order used to increase to infinity (at some appropriate rate) as the sample size increases, consistency of the functional sieve bootstrap can be established. We demonstrate this by proving a basic bootstrap central limit theorem for functional finite Fourier transforms and by establishing bootstrap validity in the context of a fully functional testing problem. A novel procedure to select the number of functional principal components is introduced while simulations illustrate the good finite sample performance of the new bootstrap method proposed.

Optimization of Fuselage by Design and Analysis for Stress caused due to Pressure Loads

The word fuselage of an aircraft is basically to pressurization has been a noteworthy worry in the assembling of aircraft pressurization perspective as it has a higher anxiety weight vessel among every one of the shapes, yet, circle being a feign body is thought to be superior to anything a circle to convey the payload and picked is a mix of the circle and the barrel to accomplish ideal streamlined stream. Our prime point is to change over this feign body conveying the payload. We have concentrated fundamentally on two subtle elements drag, in this manner expanding the general lift of the airplane was planned and auxiliary examinations were basic load limit was initiated. A heap of 101.92kg/cm2 was connected to both the bodies under barrel and oval having a similar material, least anxiety esteem, surface region and 10% decrease in the most extreme anxiety esteem were taken note.

Use of RESRAD-Onsite 7.2 Code to Assess Environmental Risk around Tudor Shaft Mine Tailing Sites

The RESRAD-onsite 7.2 code has been used to assess the total dose rate in Tudor shaft site contaminated over an area of 10 km2. The risk analysis simulation was span over a period of 1.0E+3 years. The maximum total dose of 1.64 mSv/yr was obtain at t = 8.17 ± 0.02 years. The total peak dose at time t = 0 yr. is 1.63 ± 1.0 mSv/yr for all pathways. This value is 6.53 times higher compare to the basic radiation dose limit of 2.5E-01 mSv/yr. The evaluated excess cancer risk was 3.46E-3 and is 10 times higher compared to the recommended limit of WHO. A cover layer depth of 1.25 m was simulated using the code and a total maximum peak dose for all pathways was 2.52E-01 mSv/yr at t = 5.0E+2 ± 1.0 years.

Limit behaviors of extended Kalman filter as a parameter estimator for a sinusoidal signal

In this note, the basic limit behaviors of the solution to Riccati equation in the extended Kalman filter as a parameter estimator for a sinusoidal signal are analytically investigated by using lim sup and lim inf in advanced calculus. We show that if the covariance matrix has a limit, then it must be a zero matrix.

Electrical circuits described by fractional conformable derivative

SummaryIn the last 3 years, the fractional conformable derivative and its properties have been introduced. Unlike other definitions, this new fractional derivative is based on the basic limit definition of the derivative and satisfies the same formulas of derivation, such as product and quotient of 2 functions and the chain rule. Using this new derivative, we obtain a new class of linear ordinary differential equations with noninteger power variable coefficients for the Resistance Capacitance (RC), Inductance Capacitance (LC), and Resistance, Inductance Capacitance (RLC) electric circuits. The numerical solutions are solved through the Matlab software. Solutions depend on time and on the fractional order parameter 0 < γ ≤ 1. The computing using this new derivative is much easier than using other definitions of fractional derivative. It has been shown that in the particular case γ = 1, these solutions become the ordinary ones. Also, a comparison has been made with the Caputo fractional derivative for the case of the RC circuit with constant source.

Weak coupling limits and colliding punctures in class- S theories

Class-S theories are four-dimensional N=2 supersymmetric field theories constructed by the reduction of a (2,0) six-dimensional theory on a punctured Riemann surface C (called the UV curve). A basic degeneration limit of the surface C is when several punctures are brought close to each other. As this happens, a long tube appears in C and a weakly coupled gauge group emerges. When the corresponding gauge coupling is turned off, we are left with two surfaces. This decoupling leads to a unique result. We explain how to fix the gauge group that becomes weakly coupled and the resulting two theories, in terms of the types of punctures on the surface C. Each of the resulting theories is given in terms of a class-S theory (plus possibly additional free hypermultiplets). Many other more complicated degeneration limits can be described by repeatedly using this specification. For questions about weak coupling limits in such theories, it is useful to consider the set of punctures that can appear at the end of a tube. These are the punctures that are created in the resulting surfaces when the gauge coupling is taken to be extremely weak. Not any puncture can be formed in a decoupling process, and this set is described. Each such puncture can be found diagrammatically in terms of the other punctures on C in a particular decoupling limit. The relation of the gauge group to the symmetry associated with this puncture is discussed. We discuss the relation of such degeneration limits of large N theories, through the AdS/CFT correspondence, to decoupled field theories on AdS_5.

The Research on Graduate Students’ Understanding of Three Basic Limit Concepts

This research adopted the methods of semi-structured interviews and questionnaires, chose 40 first year graduate students as participants, studied what opinions they held about the relationship between the three limits which are limit of a sequence，limit of a function at a point and limit of a function at infinity. The study shows that most of students’ understanding of the concept of limits is incomplete. They believe that three limit concepts are distinct but related, and cannot be integrated into a limit concept. Misconceptions and cognition obstacle of the limit exist extensively in the mind of graduate student, and it is very difficult to overcome for them. It is necessary for both teachers and textbooks to clarify the "common" of the three limits and provide a unifying organizational framework to all three concepts of limit for students. These new findings expand and deepen the current research about students’ understanding of three limits.

A comparison of the role of beamwidth in biological and engineered sonar

Sonar is an important sensory modality for engineers as well as in nature. In engineering, sonar is the dominating modality for underwater sensing. In nature, biosonar is likely to have been a central factor behind the unprecedented evolutionary success of bats, a highly diverse group that accounts for over 20% of all mammal species. However, it remains unclear to what extent engineered and biosonar follow similar design and operational principles. In the current work, the key sonar design characteristic of beamwidth is examined in technical and biosonar. To this end, beamwidth data has been obtained for 23 engineered sonar systems and from numerical beampattern predictions for 151 emission and reception elements (noseleaves and ears) representing bat biosonar. Beamwidth data from these sources is compared to the beamwidth of a planar ellipsoidal transducer as a reference. The results show that engineered and biological both obey the basic physical limit on beamwidth as a function of the ratio of aperture size and wavelength. However, beyond that, the beamwidth data revealed very different behaviors between the engineered and the biological sonar systems. Whereas the beamwidths of the technical sonar systems were very close to the planar transducer limit, the biological samples showed a very wide scatter away from this limit. This scatter was as large, if not wider, than what was seen in a small reference data set obtained with random aluminum cones. A possible interpretation of these differences in the variability could be that whereas sonar engineers try to minimize beamwidth subject to constraints on device size, the evolutionary optimization of bat biosonar beampatterns has been directed at other factors that have left beamwidth as a byproduct. Alternatively, the biosonar systems may require beamwidth values that are larger than the physical limit and differ between species and their sensory ecological niches.

Тренды в развитии кадрового менеджмента: результаты международного саммита HR Digital 2017

The article analyses the development trends of the HR-management practice on the basis of presentations by the experts on the World Summit HR Digital — 2017. The reasons of change from socio-humanistic HR-management to economic and marketing HR-management are justifi ed. The trends of the instrumental updates of the personnel manager functionality are given. The article identifi es the key managerial tasks in predictive technological development of HR-management, aimed at the design of turnover rate model, and assessment model of economic returns on resources, which are invested in HR-management. The author presents the empirical investigation results aimed at assessment of the ceiling on transformation HR-management and time lag in entry updates. The basic limit on spread widely and rapidly of the new digital technology is determined: the policies of budgeting of the workforce management functional; the concerns about investment return and low level of confi dence in automation of the manual and traditional management processes.

Operando Spectroscopy of the Gas-Phase Aldol Condensation of Propanal over Solid Base Catalysts

The gas-phase aldol condensation of propanal, taken as model for the aldehyde components in bio-oils, has been studied with a combined operando set-up allowing to perform FT-IR & UV–Vis diffuse reflectance spectroscopy (DRS) with on-line mass spectrometry (MS). The selected solid base catalysts, a cesium-exchanged X zeolite (Cs-X), a calcium hydroxyapatite (Ca-HA) and two alkaline metal-grafted ultrastable Y (Na- and Rb-USY) zeolites, were characterized ex-situ by FT-IR after CO (CO-IR) and pyridine (Py-IR) adsorption and subsequent desorption. The combined operando spectroscopy study shows that alkaline metal-grafted USY zeolites are the most selective catalysts towards aldol dimer product formation, while the hydroxyapatite was more selective for successive aldol condensation reactions. For Na-USY and Rb-USY, the C–C coupling seems to be the rate-determining step during the surface reaction, which is the limiting stage of the overall catalytic process. In contrast, for the two more basic catalysts, i.e., Cs-X and Ca-HA desorption is limiting the overall catalytic process. Furthermore, the combined operando FT-IR & UV–Vis DRS methodology allowed monitoring the formation of carbonaceous deposits as a function of reaction time. In particular, for Cs-X and Ca-HA the rapid formation of carbonaceous deposits was observed consisting of (poly-)aromatics and highly conjugated structures, respectively. The physicochemical properties of Ca-HA with strong basic sites and moderate acidity limit its deactivation despite the observed coke formation. On the other hand, both USY catalysts were more efficient in suppressing coke formation likely due to the moderate strength of their active sites.

A thermodynamic perspective to study energy performance of vacuum-based membrane dehumidification

In humid environments, decoupling the latent and sensible cooling loads - dehumidifying - can significantly improve chiller efficiency. Here, a basic limit for dehumidification efficiency is established from fundamental thermodynamics. This is followed by the derivation of how this limit is modified when the pragmatic constraint of a finite flux must be accommodated. These limits allow one to identify promising system modifications, and to quantify their impact. The focus is on vacuum-based membrane dehumidification. New high-efficiency configurations are formulated, most notably, by coupling pumping with condensation. More than an order-of-magnitude improvement in efficiency is achievable. It is contingent on water vapor exiting at its saturation pressure rather than at ambient pressure. Sensitivity studies to recovery ratio, temperature, relative humidity and membrane selectivity are also presented.

Reliability study on skewness of doublet impinging injectors

The atomization characteristics of skewed like-on-like impinging injectors were studied using water as a simulant. The shadowgraph technique and Laser deflection analyzer were used to understand the variances in spray mode, breakup length, and spray angles with the fraction of skewness under different angles of impingement, pressure, and Weber number. The range of reliability of performance from the perspective of the manufacturer was determined through quantitative and qualitative analyses of atomization and spray characteristics. The three different modes of spray breakup were well mixed, reflective, and transmissive. The breakup length decreased with the increase in spray angle up to a certain fraction of skewness. The spray fan angle and SMD in skewed impinging injection were directly proportional to the fraction of skewness. A large fraction of skewness provided the spray sheet with a small droplet size at the center of the spray sheet and large droplet sizes with rising radial distances toward the edge of the sheet. This paper attempts to define the maximum allowable misalignment and basic reliability limit for the design and evaluation of performance of impinging injectors in terms of fraction of skewness. Values at the perfect impingement condition were used as references for the significant reduction in the manufacturing cost of impinging injectors.

IDENTIFICATION OF DIFFICULTY IN RESOLVING PROBLEMS trigonometric functions LIMIT IN CLASS XI MA PIP (ISLAMIC EDUCATION PARIGI) HABIRAU TENGAH

This research is a field (field research) the research done by going directly to the field to investigate and identify the difficulties in solving problems pertaining to matter limit trigonometric functions in class XI IPA at MA PIP (Islamic Education Parigi) Habirau Central , Researchers describe the forms of the mistakes made by the students as a sign of difficulty for students in solving the limit of trigonometric functions. Based on the analysis of data from the four aspects of student difficulties in solving the limit of trigonometric functions, difficulties in implementing aspects of the basic formula of limit of trigonometric functions have error rates of students reached 94.56%. While the difficulty in outlining aspects of a matter form has an error rate of 86.95%. As for the difficulties in implementing aspects of the main limit theorem has an error rate of 65.21% and the difficulties in aspects perform arithmetic operations / computing student has an error rate of 52.70%. From the analysis, it appears that the location of the difficulties highest / most numerous in aspects of applying the basic formula limit of trigonometric functions. Key word: math difficulties, problems limit function trigonemetri

Solution of conformable fractional ordinary differential equations via differential transform method

Recently, a new fractional derivative called the conformable fractional derivative is given which is based on the basic limit definition of the derivative in (Khalil et al., 2014). Then, the fractional versions of chain rules, exponential functions, Gronwall’s inequality, integration by parts, Taylor power series expansions is developed in (Abdeljawad, 2015). In this paper, we give conformable fractional differential transform method and its application to conformable fractional differential equations.