scholarly journals Use of Fertilizers in Agriculture: Individual Effective Dose Estimate

Environments ◽  
2020 ◽  
Vol 7 (1) ◽  
pp. 7 ◽  
Author(s):  
Raffaella Ugolini ◽  
Elena Caldognetto ◽  
Flavio Trotti
Keyword(s):  
Effective Dose ◽  
Input Data ◽  
Scientific Literature ◽  
Calculation Model ◽  
Dose Assessment ◽  
Conservative Estimate ◽  
Natural Origin ◽  
Activity Concentrations ◽  
The Individual ◽  
238U Series

Natural radioactivity might be present in fertilizers above ordinary levels, in particular for 40K and for the radionuclides of the 238U series. A modeling evaluation of the individual effective dose deriving from the use of fertilizers in agriculture is presented here. Dose assessment is useful in the transposition of Directive 2013/59/Euratom, which rules the individual exposure to commodities containing radionuclides of natural origin, such as fertilizers. The following input data have been considered for this study: the amount of fertilizers used in the region of Veneto and in Italy; the utilized agricultural area (to estimate the density of spread fertilizers); and, the average values of activity concentrations in fertilizers for 40K and 238U series radionuclides, derived from scientific literature. The individual effective dose was evaluated while using the Resrad calculation model, making assumptions on the characteristics of the interested soil. This study is focused on the region of Veneto, where the use of fertilizers is higher with respect to the rest of Italy, such providing a more conservative estimate of the individual effective dose to the population. The results show that the estimated individual effective dose values do not exceed few µSv per year. The category that most contributes to the dose is that of compound fertilizers and radon and 40K are the most significant radionuclides.

MEASUREMENT OF THE ACTIVITY CONCENTRATIONS OF GAMMA EMITTING RADIONUCLIDES IN TOOTHPASTE SAMPLES AND ASSESSMENT OF THE CORRESPONDING ANNUAL EFFECTIVE DOSES

2021 ◽  
Author(s):  
Anas M Ababneh ◽  
Qutad M Samarah
Keyword(s):  
Effective Dose ◽  
Oral Hygiene ◽  
Annual Effective Dose ◽  
Daily Basis ◽  
Dose Assessment ◽  
Accidental Ingestion ◽  
Activity Concentrations ◽  
Effective Doses

Abstract It is inevitable that we are exposed to radiation daily from various sources and products that we consume on daily basis. The use of toothpaste for oral hygiene is one of the most common daily practices by humans and yet very little data are available regarding its radiation content. In this work, we investigated the concentrations of gamma emitting radionuclides in toothpaste samples consumed in Jordan. 40K and 226Ra were detected in almost one-third of the samples, whereas 228Ra was detected in nearly half of them. The corresponding activity concentrations in the detected samples were in the ranges of 68.7–154.2, 4.6–14.1 and 1.3–10.0 Bq/kg, respectively. Dose assessment of accidental ingestion of toothpaste for children and adults was made, and its contribution to the annual effective dose was found to be very minimal with maximum doses of ~2.9 and 1.3 μSv for children and adults, respectively.

scholarly journals Natural Radioactivity and dose Assessment in Sand and Sediment Samples from Kuakata Beach, Bangladesh

2016 ◽  
Vol 40 (1) ◽  
pp. 45-55 ◽  
Author(s):  
Md Murad Ahmed ◽  
Suranjan Kumar Das ◽  
Sariful ◽  
Selina Yeasmin
Keyword(s):  
Effective Dose ◽  
Annual Effective Dose ◽  
Dose Assessment ◽  
Absorbed Dose Rate ◽  
Radium Equivalent Activity ◽  
Mean Values ◽  
Sediment Samples ◽  
World Average ◽  
Average Value ◽  
Activity Concentrations

The activity concentrations of radionuclides and their respective annual effective dose rates produced by 226Ra, 232Th and 40K were measured by using high purity germanium (HPGe) detector of relative efficiency 20%. The activity concentrations of 226Ra, 232Th and 40K in the sand samples were found to vary from 22.83 ± 4.11 to 100.21 ± 2.39 BqKg-1, 68.76 ± 2.86 BqKg-1 to 297.37 ± 4.32 BqKg-1 and 75.87 ± 15.75 to 161.81 ± 19.90 BqKg-1 with mean values 48.76, 126.11 and 292.38 Bqkg-1, respectively. For sediment samples the corresponding radionuclides ranged between 12.11 ± 1.99 and 31.64 ± 1.64 BqKg-1, 18.94 ± 1.90 BqKg-1 and 71.11 ± 2.88 BqKg-1 and 182.73 ± 19.81 BqKg-1 and 345.77 ± 21.07 BqKg-1, with mean values 19.67, 32.13 and 243.38 Bqkg-1, respectively. The absorbed dose rate was estimated to the range from 30.50 to 242.93 nGyh-1 with an average value of 74.87 nGyh-1. The estimated outdoor annual effective dose varied between 0.22 and 1.79 mSv/year with a mean value of 0.55 mSv/year, which is higher than the world average for outdoor annual effective dose (0.07 mSv/year). The external hazard indices for the samples varied from 0.17 to 1.43 with the average value of 0.44, which is less than the unity. The average value of radium equivalent activity was estimated and found to be 161.40 BqKg-1 which is less than the acceptable limit of world average value of 370 BqKg-1.Journal of Bangladesh Academy of Sciences, Vol. 40, No. 1, 45-55, 2016

scholarly journals Radon Activity Concentrations in Natural Hot Spring Water: Dose Assessment and Health Perspective

2021 ◽  
Vol 18 (3) ◽  
pp. 920
Author(s):  
Eka Djatnika Nugraha ◽  
Masahiro Hosoda ◽  
June Mellawati ◽  
Untara Untara ◽  
Ilsa Rosianna ◽  
...  
Keyword(s):  
Public Health ◽  
Effective Dose ◽  
Radiation Protection ◽  
Water Samples ◽  
Hot Springs ◽  
Hot Spring ◽  
Annual Effective Dose ◽  
Spring Water ◽  
Dose Assessment ◽  
West Java

The world community has long used natural hot springs for tourist and medicinal purposes. In Indonesia, the province of West Java, which is naturally surrounded by volcanoes, is the main destination for hot spring tourism. This paper is the first report on radon measurements in tourism natural hot spring water in Indonesia as part of radiation protection for public health. The purpose of this paper is to study the contribution of radon doses from natural hot spring water and thereby facilitate radiation protection for public health. A total of 18 water samples were measured with an electrostatic collection type radon monitor (RAD7, Durridge Co., USA). The concentration of radon in natural hot spring water samples in the West Java region, Indonesia ranges from 0.26 to 31 Bq L−1. An estimate of the annual effective dose in the natural hot spring water area ranges from 0.51 to 0.71 mSv with a mean of 0.60 mSv for workers. Meanwhile, the annual effective dose for the public ranges from 0.10 to 0.14 mSv with an average of 0.12 mSv. This value is within the range of the average committed effective dose from inhalation and terrestrial radiation for the general public, 1.7 mSv annually.

Calculation of the individual effective dose equivalent in Italy following the chernobyl accident

1991 ◽  
Vol 13 (2) ◽  
pp. 141-156
Author(s):  
M. Lotfi ◽  
S. Mancioppi ◽  
S. Piermattei ◽  
L. Tommasino ◽  
D. Azimi-Garakani
Keyword(s):  
Effective Dose ◽  
Chernobyl Accident ◽  
Effective Dose Equivalent ◽  
Dose Equivalent ◽  
The Individual

A Back Allocation Methodology to Estimate the Real-Time Flow and Assist Production Monitoring

2021 ◽  
Author(s):  
Gabriela Chaves ◽  
Danielle Monteiro ◽  
Virgilio José Martins Ferreira
Keyword(s):  
Real Time ◽  
Input Data ◽  
Oil Field ◽  
Well Testing ◽  
Well Test ◽  
Time Data ◽  
Time Flow ◽  
Well Model ◽  
Operational Information ◽  
The Individual

Abstract Commingle production nodes are standard practice in the industry to combine multiple segments into one. This practice is adopted at the subsurface or surface to reduce costs, elements (e.g. pipes), and space. However, it leads to one problem: determine the rates of the single elements. This problem is recurrently solved in the platform scenario using the back allocation approach, where the total platform flowrate is used to obtain the individual wells’ flowrates. The wells’ flowrates are crucial to monitor, manage and make operational decisions in order to optimize field production. This work combined outflow (well and flowline) simulation, reservoir inflow, algorithms, and an optimization problem to calculate the wells’ flowrates and give a status about the current well state. Wells stated as unsuited indicates either the input data, the well model, or the well is behaving not as expected. The well status is valuable operational information that can be interpreted, for instance, to indicate the need for a new well testing, or as reliability rate for simulations run. The well flowrates are calculated considering three scenarios the probable, minimum and maximum. Real-time data is used as input data and production well test is used to tune and update well model and parameters routinely. The methodology was applied using a representative offshore oil field with 14 producing wells for two-years production time. The back allocation methodology showed robustness in all cases, labeling the wells properly, calculating the flowrates, and honoring the platform flowrate.

scholarly journals THE ESSENCE OF ARTISTIC AND CREATIVE COMPETENCE OF CLOTHING TECHNICAL DESIGNERS

2019 ◽  
pp. 43-49
Author(s):  
Liudmyla Lemeshko
Keyword(s):  
Professional Development ◽  
Essential Role ◽  
Scientific Literature ◽  
Professional Competence ◽  
General Structure ◽  
Highly Qualified ◽  
Light Industry ◽  
Leading Role ◽  
Professional Field ◽  
The Individual

The relevance of the paper lies in the need of garment manufacture in highly qualified technical designers, who can apply their artistic, creative and art skills in practice and have knowledge not only about design, clothing technology but also about artistic courses aimed at developing artistic and creative competence. The paper aims to study the components of artistic and creative competence of clothing technical designers in the scientific literature and analyze the essence of this competence. Methods: a classic analysis of psycho-pedagogical, scientific and methodological literature, legal acts and documents, educational and methodical documents and proceedings of conferences to generalize conceptual approaches to solving the problem under study to reveal the essence of artistic and creative competence of clothing technical designers; generalization – to integrate and group different classifications of artistic and creative competence into an integral unity, which manifests itself in the ability of the individual to work effectively in the professional field to formulate relevant conclusions. Results. The paper studies and reveals the components of artistic and creative competence of clothing technical designers. Also, it contains a theoretical analysis of recent publications on the study of artistic, creative, as well as artistic and creative competences. The paper shows that artistic and creative competence plays a leading role in the structure of the professional competence of students majoring in Light Industry Technologies. Modelling and Design of Industrial Products (specialty No 182). This competence combines ... Conclusions: every type of competences plays a particular role in the professional development of specialists. The competences related to the specifics of artistic and creative activities are incredibly essential for future clothing technical designers. Artistic and creative competence plays an essential role in the general structure of multidimensional professional competence of future clothing technical designers and is rather multidisciplinary...

scholarly journals Patient-Informed Organ Dose Estimation in Clinical CT: Implementation and Effective Dose Assessment in 1048 Clinical Patients

2021 ◽  
Vol 216 (3) ◽  
pp. 824-834
Author(s):  
Wanyi Fu ◽  
Francesco Ria ◽  
William Paul Segars ◽  
Kingshuk Roy Choudhury ◽  
Joshua M. Wilson ◽  
...  
Keyword(s):  
Effective Dose ◽  
Organ Dose ◽  
Dose Assessment ◽  
Dose Estimation

Lastverteilung in Planetenrollengewindetrieben/Description of the load distribution in planetary roller screws

2020 ◽  
Vol 110 (05) ◽  
pp. 322-327
Author(s):  
Christian Brecher ◽  
Thomas Frenken ◽  
Gabriel Axelrad ◽  
Stephan Neus
Keyword(s):  
Load Distribution ◽  
Load Capacity ◽  
Calculation Model ◽  
Axial Stiffness ◽  
Contact Points ◽  
Calculation Results ◽  
Roller Screw ◽  
The Individual ◽  
Individual Contact ◽  
High Load Capacity

Planetenrollengewindetriebe finden aufgrund ihrer hohen Tragfähigkeit Anwendung in Bereichen, in denen Kugelgewindetriebe an ihre Lastgrenzen stoßen. Um ein Berechnungsmodell für Planentenrollengewindetriebe zu entwickeln, wurden Berechnungsmethoden zur Beschreibung der Lastverteilung innerhalb des Planetenrollengewindetriebs entwickelt. Mit diesen lassen sich die in den einzelnen Kontaktpunkten wirkenden Kräfte sowie die Verlagerungen des Gewindetriebs bestimmen. Die Berechnungsergebnisse werden unter anderem für die Berechnung der statischen axialen Steifigkeit und der Ermüdungslebensdauer benötigt.   Due to their high load capacity, planetary roller screws are used in areas where ball screws reach their load limits. To develop a calculation model for planetary roller screws, calculation methods to describe the load distribution within the planetary roller screw were developed in this step. With these methods, the forces acting in the individual contact points as well as the displacements of the screw drive can be determined. The calculation results are required, among other things, for the calculation of static axial stiffness and fatigue life.

Die deutsche Gründerlandschaft im Energiesektor und ressourcenbedingte Voraussetzungen für eine Gründungsfinanzierung eines Energie-Startups

2020 ◽  
Vol 68 (3-4) ◽  
pp. 169-189
Author(s):  
Theresa Fritz ◽  
Wolfgang Burr
Keyword(s):  
Human Capital ◽  
Scientific Literature ◽  
Empirical Studies ◽  
Organizational Level ◽  
Team Members ◽  
Start Up ◽  
Utility Models ◽  
The Individual ◽  
Technological Capital ◽  
Start Ups

Zusammenfassung Empirische Untersuchungen zur Gründungslandschaft der deutschen Energiewirtschaft sind in der wissenschaftlichen Literatur bisher unterrepräsentiert. Im Zuge einer explorativen Darstellung von deutschen Energie-Startups wird zu Beginn ein Überblick über die Gründungsbereiche, die Gründungsteams sowie die finanzielle Lage von 126 deutschen Energie-Startups gegeben. Mithilfe einer Regressionsanalyse werden im nächsten Schritt die Einflüsse von Humankapital und technologischen Ressourcen auf die Akquise von Finanzierungsmitteln überprüft. Im Rahmen der Auswertung kann ein signifikanter Zusammenhang zwischen der Anzahl der Gründer, den individuellen Fähigkeiten der Teammitglieder sowie der Anzahl der Patente und Gebrauchsmuster auf die Akquise von Finanzierungsmitteln nachgewiesen werden. Dies legt den Schluss nahe, dass die Kombination der beiden Ressourcen Humankapital und technologisches Kapital den Aufbau von Kompetenz bei der Finanzierungsmittelakquise auf organisationaler Ebene begünstigen und zum Wachstum des Startups beitragen können. Abstract Empirical studies on the start-up landscape of the German energy industry have so far been underrepresented in the scientific literature. In the course of an exploratory presentation of German energy start-ups, an overview of the start-up areas, the founding teams and the financial situation of 126 German energy start-ups is given at the beginning. In the next step, a regression analysis is used to examine the influence of human capital and technological resources on the acquisition of funding. As part of the evaluation, a significant relationship between the number of founders, the individual skills of the team members and the number of patents and utility models on the acquisition of funding can be demonstrated. This suggests that the combination of the two resources human capital and technological capital can facilitate the development of skills in the acquisition of funding at the organizational level and contribute to the growth of the start-up.

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