scholarly journals Derivation and Mapping of Critical Loads for Nitrogen and Trends in Their Exceedance in Germany

2001 ◽  
Vol 1 ◽  
pp. 936-944 ◽  
Author(s):  
Hans-Dieter Nagel ◽  
Heinz-Detlef Gregor

The term “critical load” means a quantitative estimate of an exposure to one or more pollutants below which significant harmful effects on specified sensitive elements of the environment do not occur, according to present knowledge. In the case of nitrogen, both oxidised and reduced compounds contribute to the total deposition of acidity, which exceeds critical loads in many forest ecosystems. These also cause negative effects through eutrophication. Critical loads of nitrogen were derived for forest soils (deciduous and coniferous forest), natural grassland, acid fens, heathland, and mesotrophic peat bogs. In Germany, a decrease in sulphur emissions over the past 15 years resulted in a reduced exceedance of critical loads for acid deposition. In the same period it was noted that reduction in the emissions of nitrogen oxides and ammonia remained insignificant. Therefore, emissions of nitrogen compounds have become relatively more important and will continue to threaten ecosystem function and stability. The risk of environmental damage remains at an unacceptable level. The German maps show the degree to which the critical loads are exceeded, and they present current developments and an expected future trend. Results indicate that recovery from pollutant stress occurs only gradually.

GIS Business ◽  
2019 ◽  
Vol 14 (6) ◽  
pp. 656-666
Author(s):  
Dr. Entisar Al-Obaidi

Media refers to the channels of communication through which we distribute news, education, movies, music, advertising messages and other information. It includes physical and online newspapers and magazines, television, radio, telephone, the Internet, fax and billboards, are a dominant force in lives of children. Although television is remaining the predominant medium for children and adolescents, the new technologies are become more popular. We have to concern about the potential harmful effects of media "messages and images"; however, the positive and negative effects of media should be recognized. Parents have to establish the plan for all media in family home. Media that are influences on children should be recognized by "schools, policymakers, product advertisers, and entertainment producers".


2014 ◽  
Vol 1 (1) ◽  
Author(s):  
Turkan Ahmet

The past few decades of ongoing war in Iraq has had a dramatic impact on the health of Iraq’s population. Wars are known to have negative effects on the social and physical environments of individuals, as well as limit their access to the available health care services. This paper explores the personal experiences of my family members, who were exposed to war, as well as includes information that has been reviewed form many academic sources. The data aided in providing recommendations and developing strategies, on both local and international levels, to improve the health status of the populations exposed to war.


1997 ◽  
Vol 62 ◽  
Author(s):  
A. De Schrijver ◽  
L. Nachtergale ◽  
L. De Temmerman ◽  
J. M.F. Frechilla ◽  
S. Mussche ◽  
...  

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2020 ◽  
Vol 30 (Supplement_5) ◽  
Author(s):  
S Brolin Låftman ◽  
Y Bjereld ◽  
B Modin ◽  
P Löfstedt

Abstract Background Students who are subjected to sexual harassment at school report lower psychological well-being than those who are not exposed. Yet, it is possible that the occurrence of sexual harassment in the school class is stressful also for those who are not directly targeted, with potential negative effects on well-being for all students. The aim was to examine whether sexual harassment at the student- and at the class-level was associated with students' psychological complaints. Methods Data from the Swedish Health Behaviour in School-aged Children (HBSC) of 2017/18 was used, with information from students aged 11, 13 and 15 years (n = 3,720 distributed across 209 classes). Psychological complaints were constructed as a summative index of four items capturing how often the student had felt low, felt irritable or bad tempered, felt nervous, or had difficulties to fall asleep, during the past six months (Cronbach's alpha=0.78). Sexual harassment at the student-level was measured by one item concerning bullying at school: “Other students have exposed me to sexual jokes”. Students who reported that this had happened at least “2 or 3 times a month” were classified as exposed to sexual harassment at school. Sexual harassment at the class-level was defined as the school class proportion of students exposed to sexual harassment, reported in per cent. Two-level linear regression analysis was applied. Results Students who had been exposed to sexual harassment had higher levels of psychological complaints (b = 2.74, p < 0.001). The proportion of students in the school class who had been exposed to sexual harassment was also associated with higher levels of psychological complaints, even when adjusting for sexual harassment at the student-level, gender and grade (b = 0.03, p = 0.015). Conclusions Sexual harassment is harmful for those who are exposed, but may also affect other students negatively. Thus, a school climate free from sexual harassment will profit all students. Key messages Using data collected among students aged 11, 13 and 15 years, this study showed that sexual harassment at the student- and class-level was associated with higher levels of psychological complaints. Sexual harassment is harmful for those who are exposed, but may also affect other students negatively. Thus, a school climate free from sexual harassment will profit all students.


2021 ◽  
Vol 2 (1) ◽  
pp. 69-79
Author(s):  
Hurmat Ejaz ◽  
Esther Somanader ◽  
Uday Dave ◽  
Hermann Ehrlich ◽  
M. Azizur Rahman

Didymosphenia geminata diatoms, or Didymo, was first found to be an invasive species that could have negative impacts on the environment due to the aggressive growth of its polysaccharide-based stalks. The stalks’ adhesive properties have prompted park officials to alert the general public to limit further spread and contamination of this algae to other bodies of water. Although the negative effects of Didymo have been studied in the past, recent studies have demonstrated a potential positive side to this alga. One of the potential benefits includes the structural component of the polysaccharide stalks. The origin of the polysaccharides within stalks remains unknown; however, they can be useful in a waste management and agricultural setting. The primary purpose of this study was to describe both the harmful and beneficial nature of Didymo. Important outcomes include findings related to its application in various fields such as medicine and technology. These polysaccharides can be isolated and studied closely to produce efficient solar power cells and batteries. Though they may be harmful while uncontained in nature, they appear to be very useful in the technological and medical advancement of our society.


2021 ◽  
Vol 6 (5) ◽  
pp. e005438
Author(s):  
Quanbao Jiang ◽  
Cuiling Zhang

BackgroundChina’s sex ratio at birth (SRB) has declined in the past decade but still exceeds the normal level. This study seeks to depict the SRB trend in the past two decades.MethodsWe depicted the SRB trend, including SRB by birth order, children composition, residence and hukou type, education, race and province using latest data available from multiple data sources and standardisation and decomposition methods.ResultsThe SRB remained around 120 in the first decade from 2000 to 2010, and recently declined and approached the normal level during 2010–2020. The SRB for second births and first births converged to the normal level, whereas the SRB for third and above births exceeded the normal level. The rising proportion of second births increased, whereas the decreasing proportion of first births reduced the overall SRB. Parents with only daughters are more likely to abort a female fetus in pursuit of a son, while parents with only sons are more likely to abort a male fetus in pursuit of a daughter. It also shows difference in SRB by residence, hukou type, educational attainment and race. Urban SRB was lower than rural SRB, by the residence and hukou type, but higher than rural SRB after being standardised. Provinces still exhibit differences by original categorised policy even after the implementation of the universal two-child policy.ConclusionsChina’s SRB has declined substantially during the past two decades, but the negative effects need to be tackled.


2021 ◽  
Vol 15 (2) ◽  
pp. 155798832199770
Author(s):  
Faten Chaieb ◽  
Helmi Ben Saad

Narghile use has regained popularity throughout the world. Public opinion misjudges its chronic harmful effects on health, especially on the cardiovascular system. This systematic review aimed to evaluate the chronic effects of narghile use on cardiovascular response during exercise. It followed the preferred reporting items for systematic reviews guidelines. Original articles from PubMed and Scopus published until January 31, 2020, written in English, and tackling the chronic effects of narghile use on human cardiovascular response during exercise were considered. Five studies met the inclusion criteria. Only males were included in these studies. They were published between 2014 and 2017 by teams from Tunisia ( n = 4) and Jordan ( n = 1). One study applied the 6-min walk test, and four studies opted for the cardiopulmonary exercise test. Narghile use was associated with reduced submaximal (e.g., lower 6-min walk distance) and maximal aerobic capacities (e.g., lower maximal oxygen uptake) with abnormal cardiovascular status at rest (e.g., increase in heart rate and blood pressures), at the end of the exercise (e.g., lower heart rate, tendency to chronotropic insufficiency) and during the recovery period (e.g., lower recovery index). To conclude, chronic narghile use has negative effects on cardiovascular response to exercise with reduced submaximal and maximal exercise capacities.


2018 ◽  
Vol 19 (1) ◽  
pp. 73-88
Author(s):  
Rihlah Nur Aulia ◽  
Izzatul Mardhiah ◽  
Dian Bagus ◽  
Ade Gunawan ◽  
Dian Elvira Nanda Sari

This research is backgrounded by some environmental problems which increasingly worries day plus the problem of management of natural resources that are not friendly and tend to be greedy. The rapid pace of development and population growth in the past decade has led to the conversion of forest and agricultural land into industrial, plantation and residential areas, resulting in degradation of uncontrolled environmental damage and pollution. The main purpose of this research is to know how environmental management conducted by Pondok Pesantren SPMAA Lamongan, East Java. In addition, the purpose of this study to find out how the implementation of environmental management conducted by the boarding school as a mirror of concern for the surrounding environment. This research uses qualitative approach. This means that the data collected is not a number, but the data comes from interviews, personal documents, memo notes, field notes, and other official documents. So that the purpose of this study is to describe the empiric reality behind the phenomenon in depth, detailed, and thorough. This research concludes that every pesantren has its own characteristic in running the concept of ekopesantren that exist, and in this pesantrenen pesantren SPMAA ekopesantren understood as pesantren that can coexist with nature and full of lesson will utilize resources wisely and wisely. Although this boarding school has not fully implemented ekopesantren. This is seen from ecopesantren indicator that has been fulfilled and that has not been fulfilled.      


2020 ◽  
pp. 16-17
Author(s):  
Zac Waipara

We have not yet emerged into a post-COVID world. The future is fluid and unknown. As the Academy morphs under pressure, as design practitioners and educators attempt to respond to the shifting world – in the M?ori language, Te Ao Hurihuri – how might we manage such changes? There is an indigenous precedent of drawing upon the past to assist with present and future states – as the proverb ka mua ka muri indicates, ‘travelling backwards into the future,’ viewing the past spread out behind us, as we move into the unknown. Indigenous academics often draw inspiration from extant traditional viewpoints, reframing them as methodologies, and drawing on metaphor to shape solutions. Some of these frameworks, such as Te Whare Tapa Wh?, developed as a health-based model, have been adapted for educational purposes. Many examples of metaphor drawn from indigenous ways of thinking have also been adapted as design or designrelated methodologies. What is it about the power of metaphor, particularly indigenous ways of seeing, that might offer solutions for both student and teacher? One developing propositional model uses the Pacific voyager as exemplar for the student. Hohl cites Polynesian navigation an inspirational metaphor, where “navigating the vast Pacific Ocean without instruments, only using the sun, moon, stars, swells, clouds and birds as orienting cues to travel vast distances between Polynesian islands.”1 However, in these uncertain times, it becomes just as relevant for the academic staff member. As Reilly notes, using this analogy to situate two cultures working as one: “like two canoes, lashed together to achieve greater stability in the open seas … we must work together to ensure our ship keeps pointing towards calmer waters and to a future that benefits subsequent generations.”2 The goal in formulating this framework has been to extract guiding principles and construct a useful, applicable structure by drawing from research on twoexisting models based in Samoan and Hawaiian worldviews, synthesised via related M?ori concepts. Just as we expect our students to stretch their imaginations and challenge themselves, we the educators might also find courage in the face of the unknown,drawing strength from indigenous storytelling. Hohl describes the advantages of examining this approach: “People living on islands are highly aware of the limitedness of their resources, the precarious balance of their natural environment and the long wearing negative effects of unsustainable actions … from experience and observing the consequences of actions in a limited and confined environment necessarily lead to a sustainable culture in order for such a society to survive.”3 Calculated risks must be undertaken to navigate this space, as shown in this waka-navigator framework, adapted for potential use in a collaborative, studio-style classroom model. 1 Michael Hohl, “Living in Cybernetics: Polynesian Voyaging and Ecological Literacy as Models fordesign education, Kybernetes 44, 8/9 (October 2015). https://doi.org/ 10.1108/K-11-2014-0236.2 Michael P.J Reilly, “A Stranger to the Islands: Voice, Place and the Self in Indigenous Studies”(Inaugural Professorial Lecture, University of Otago, Dunedin, New Zealand, 2009).http://hdl.handle.net/10523/51833 Hohl, “Living in Cybernetics”.


Author(s):  
P.N. Babaev ◽  

Purpose. To study the number of medical appeals and the incidence of school-age children in Baku, exposed to passive smoking in their families. Material and methods. Schoolchildren were given 5000 questionnaires; the response was 2363 questionnaires (39.4±0.6%). The collected questionnaires of schoolchildren contained the answers of a total of 3895 parents, of which 1885 were fathers and 2010 were mothers. All schoolchildren were divided into 2 groups: 818 schoolchildren whose parents were tobacco-dependent and 1545 schoolchildren whose parents were tobacco-dependent. Depending on the degree of tobacco dependence of parents, 818 schoolchildren were divided into groups: group 1 – non-systematic smoking of parents (about 5 cigarettes a day), tobacco dependence is weak, there are no visible effects on health – 204 schoolchildren; 2nd group – habitual smoking of parents (5–15 cigarettes per day), moderate tobacco dependence, a number of negative effects on health are manifested – 252 schoolchildren; Group 3 – parents' addiction (more than 15 cigarettes a day), severe tobacco dependence, pronounced dysfunctions of various organs are manifested – 362 schoolchildren. We analyzed the outpatient medical records of children in the district children's polyclinics and determined their medical appealss and the degree of morbidity. Results. It was found that despite the widespread anti-tobacco campaign, in 34.6±1.0% of families in Baku, schoolchildren continue to be exposed to the effects of secondhand smoke, which has a detrimental effect on their eye health. The medical appeals of schoolchildren to children's polyclinics increase by 1.95 times and the level of their morbidity increases by 1.35 times, and in families whose parents smoke more than 15.0 cigarettes/ day it reaches 79.8±2.5%. Conclusion. A wide accessible educational campaign among parents is needed, the main argument of which should be the harmful effects of secondhand smoke on the health of the eyes of children. Key words: passive smoking, schoolchildren, health, eye care, vision protection.


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