scholarly journals The need to review low-dose decision-making in radiation protection

2021 ◽  
Author(s):  
Roger Coates
Keyword(s):  
Decision Making ◽  
Background Radiation ◽  
Risk Estimation ◽  
Human Life ◽  
Radiation Risk ◽  
Background Level ◽  
Current Approach ◽  
Low Doses ◽  
Natural Background ◽  
Exposure Levels

Abstract The current approach in the system of protection, and the way in which it is implemented in regulation and practical application, has resulted in the allocation of significant and disproportionate societal resources to reduce relatively low-level exposures to even lower levels. The resulting exposure levels are often a fraction of the basic natural background level, and in particular are comparable to, or often significantly less than, the variability of natural background exposures due to individual decision-making, which the system of protection deems acceptable. There are arguments for a wider approach to decision-making at such low doses, recognising the uncertainties in radiation risk estimation and acknowledging the context that all human life takes place in a variable natural background radiation which generally dominates these lower dose exposures. Recommendations are presented for improvements in how decisions are made in controlling low doses.

scholarly journals The Response of Living Organisms to Low Radiation Environment and Its Implications in Radiation Protection

2020 ◽  
Vol 8 ◽  
Author(s):  
Mauro Belli ◽  
Luca Indovina
Keyword(s):  
Ionizing Radiation ◽  
Radiation Protection ◽  
Background Radiation ◽  
Low Doses ◽  
Natural Background ◽  
Natural Background Radiation ◽  
Positive Effects ◽  
Epigenetic Effects ◽  
Non Linear ◽  
Living Organisms

Life has evolved on Earth for about 4 billion years in the presence of the natural background of ionizing radiation. It is extremely likely that it contributed, and still contributes, to shaping present form of life. Today the natural background radiation is extremely small (few mSv/y), however it may be significant enough for living organisms to respond to it, perhaps keeping memory of this exposure. A better understanding of this response is relevant not only for improving our knowledge on life evolution, but also for assessing the robustness of the present radiation protection system at low doses, such as those typically encountered in everyday life. Given the large uncertainties in epidemiological data below 100 mSv, quantitative evaluation of these health risk is currently obtained with the aid of radiobiological models. These predict a health detriment, caused by radiation-induced genetic mutations, linearly related to the dose. However a number of studies challenged this paradigm by demonstrating the occurrence of non-linear responses at low doses, and of radioinduced epigenetic effects, i.e., heritable changes in genes expression not related to changes in DNA sequence. This review is focused on the role that epigenetic mechanisms, besides the genetic ones, can have in the responses to low dose and protracted exposures, particularly to natural background radiation. Many lines of evidence show that epigenetic modifications are involved in non-linear responses relevant to low doses, such as non-targeted effects and adaptive response, and that genetic and epigenetic effects share, in part, a common origin: the reactive oxygen species generated by ionizing radiation. Cell response to low doses of ionizing radiation appears more complex than that assumed for radiation protection purposes and that it is not always detrimental. Experiments conducted in underground laboratories with very low background radiation have even suggested positive effects of this background. Studying the changes occurring in various living organisms at reduced radiation background, besides giving information on the life evolution, have opened a new avenue to answer whether low doses are detrimental or beneficial, and to understand the relevance of radiobiological results to radiation protection.

Radiopharmacology: Hazard or/and Benefit

1984 ◽  
Vol 23 (02) ◽  
pp. 87-91 ◽  
Author(s):  
K. Flemming
Keyword(s):  
Ionizing Radiation ◽  
Late Effects ◽  
Radiation Risk ◽  
Dose Effect ◽  
Radiation Hazard ◽  
Radiation Doses ◽  
Low Doses ◽  
Medical Radiology ◽  
Experimental Findings ◽  
In The Beginning

SummaryIn the beginning of medical radiology, only the benefit of ionizing radiation was obvious, and radiation was handled and applied generously. After late effects had become known, the radiation exposure was reduced to doses following which no such effects were found. Thus, it was assumed that one could obtain an optimal medical benefit without inducing any hazard. Later, due to experimental findings, hypotheses arose (linear dose-effect response, no time factor) which led to the opinion that even low and lowest radiation doses were relevant for the induction of late effects. A radiation fear grew, which was unintentionally strengthened by radiation protection decrees: even for low doses a radiation risk could be calculated. Therefore, it was believed that there could still exist a radiation hazard, and the radiation benefit remained in question. If, however, all presently known facts are considered, one must conclude that large radiation doses are hazardous and low doses are inefficient, whereas lowest doses have a biopositive effect. Ionizing radiation, therefore, may cause both, hazard as well as benefit. Which of the two effects prevails is determined by the level of dose.

scholarly journals An Estimation of Ship Collision Risk Based on Relevance Vector Machine

2021 ◽  
Vol 9 (5) ◽  
pp. 538
Author(s):  
Jinwan Park ◽  
Jung-Sik Jeong
Keyword(s):  
Machine Learning ◽  
Decision Making ◽  
Risk Estimation ◽  
Good Method ◽  
Relevance Vector Machine ◽  
Machine Learning Algorithms ◽  
Support Vector ◽  
Collision Risk ◽  
Estimation Model ◽  
Ship Collision

According to the statistics of maritime collision accidents over the last five years (2016–2020), 95% of the total maritime collision accidents are caused by human factors. Machine learning algorithms are an emerging approach in judging the risk of collision among vessels and supporting reliable decision-making prior to any behaviors for collision avoidance. As the result, it can be a good method to reduce errors caused by navigators’ carelessness. This article aims to propose an enhanced machine learning method to estimate ship collision risk and to support more reliable decision-making for ship collision risk. In order to estimate the ship collision risk, the conventional support vector machine (SVM) was applied. Regardless of the advantage of the SVM to resolve the uncertainty problem by using the collected ships’ parameters, it has inherent weak points. In this study, the relevance vector machine (RVM), which can present reliable probabilistic results based on Bayesian theory, was applied to estimate the collision risk. The proposed method was compared with the results of applying the SVM. It showed that the estimation model using RVM is more accurate and efficient than the model using SVM. We expect to support the reasonable decision-making of the navigator through more accurate risk estimation, thus allowing early evasive actions.

scholarly journals Multiple-Criteria Decision-Making and Sensitivity Analysis for Selection of Materials for Knee Implant Femoral Component

Materials ◽  
2021 ◽  
Vol 14 (8) ◽  
pp. 2084
Author(s):  
Raman Kumar ◽  
Rohit Dubey ◽  
Sehijpal Singh ◽  
Sunpreet Singh ◽  
Chander Prakash ◽  
...  
Keyword(s):  
Decision Making ◽  
Sensitivity Analysis ◽  
Femoral Component ◽  
Human Life ◽  
Multiple Criteria Decision Making ◽  
Multiple Criteria ◽  
Biomedical Science ◽  
Human Beings ◽  
Weighted Sum Method ◽  
Selection Of

Total knee replacement (TKR) is a remarkable achievement in biomedical science that enhances human life. However, human beings still suffer from knee-joint-related problems such as aseptic loosening caused by excessive wear between articular surfaces, stress-shielding of the bone by prosthesis, and soft tissue development in the interface of bone and implant due to inappropriate selection of TKR material. The choice of most suitable materials for the femoral component of TKR is a critical decision; therefore, in this research paper, a hybrid multiple-criteria decision-making (MCDM) tactic is applied using the degree of membership (DoM) technique with a varied system, using the weighted sum method (WSM), the weighted product method (WPM), the weighted aggregated sum product assessment method (WASPAS), an evaluation based on distance from average solution (EDAS), and a technique for order of preference by similarity to ideal solution (TOPSIS). The weights of importance are assigned to different criteria by the equal weights method (EWM). Furthermore, sensitivity analysis is conducted to check the solidity of the projected tactic. The weights of importance are varied using the entropy weights technique (EWT) and the standard deviation method (SDM). The projected hybrid MCDM methodology is simple, reliable and valuable for a conflicting decision-making environment.

scholarly journals The Role of Religiosity on Fashion Store Patronage Intention of Muslim Consumers in Indonesia

SAGE Open ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 215824402092703
Author(s):  
Andriani Kusumawati ◽  
Sari Listyorini ◽  
Suharyono ◽  
Edy Yulianto
Keyword(s):  
Decision Making ◽  
Human Life ◽  
Consumer Decision Making ◽  
Fashion Products ◽  
Managerial Implications ◽  
Research Findings ◽  
Store Patronage ◽  
Life Values ◽  
Patronage Intention

Religiosity covers all aspects of human life values. Consumer decision-making in Muslim product purchase needs to involve religiosity. Muslim fashion is increasingly popular and becomes a potential business for fashion entrepreneurs in Indonesia. This condition evokes a dilemma for the consumers as Muslim fashion users on whether they have to conform to the religious sharia or follow the trend. The purpose of this article is to identify the role of religiosity as a factor affecting Muslim consumers to revisit Muslim fashion stores. This research involved 243 Muslim consumers of several Muslim fashion stores. The results showed that religiosity of Muslim consumers had a direct effect on patronage intention and indirect effect on patronage intention of Muslim fashion stores through Customer Satisfaction. The research findings are directed to managerial implications for Muslim fashion entrepreneurs in relation to consumer religiosity and marketing of Indonesian Muslim fashion products.

On the emergence of new branches in the legal system of Ukraine

2021 ◽  
Vol 12 (2) ◽  
Author(s):  
Zemko Alla ◽  
◽  
Pyndor Yulia ◽  
Keyword(s):  
Social Relations ◽  
Legal System ◽  
Human Life ◽  
Legal Regulation ◽  
Current Approach ◽  
Modern World ◽  
Negative Attitudes ◽  
Global Trends ◽  
Qualified Personnel ◽  
Regulation Method

The article analyzes the current approach to the identification of new branches in the legal system of Ukraine.The modern world does not stand still and is constantly evolving and gives impetus to the development of all spheres of human life, respectively, there are relationships that require legal regulation.Some scholars believe that in the presence of an independent subject of legal regulation, its ownmethodology of legal regulation and a set of specialized legislation, it is possible todistinguish an autonomousbranch of law. It is determined that the emergence of new branches of law is hindered by the dominant concept of the existence of only the main ones. Proponents of this concept categorically reject the possibility of the existence of relevant secondary, complex branches of law. This scientific approach inhibits the study of modern social relations. Negative attitudes towards the separation of new branches of law inevitably lead to gaps in the field of special legal research and, as a consequence, to a lack of qualified personnel with specialized knowledge. It is suggested to take into account the positive experience of foreign colleagues of lawyers who boldly present the achievements of current practices and are not afraid to consider them branches of law, we mean educational, sports, military, gender, «cryptocurrency», admiralty law and others. It is concluded that the division of law into new branches allows more effective regulation of legal relations in relevant areas, given that global trends are increasingly in demand for universal lawyers, but with specialization, with in-depth knowledge in one or more areas of law. Keywords: branch of law, subject of legal regulation, method of legal regulation, complex branch of law

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