scholarly journals Development of artificially established spruce stand at the site of mountain beech after intensive selection thinning

2004 ◽  
pp. 63-75
Author(s):  
Martin Bobinac
Keyword(s):  
Basal Area ◽  
The State ◽  
Sample Plot ◽  
Height Increment ◽  
Current Volume ◽  
Volume Increment ◽  
The Future ◽  
Permanent Sample Plot

The effects of selection thinning were analyzed at a permanent sample plot in the artificially established spruce stand aged 32 years, on the site of mountain beech. The state in the 32-year-old stand was as follows: 3911 trees per ha, basal area 57.5 m2ha-1 and volume 378.3 m3ha-1. Selection thinning removed 1378 tree per ha (35.2%) and 110 m3ha-1 (29.2%), and in the period between the ages of 32 and 40 years, predominantly because of mortality, another 550 trees per ha and 21.8 m3ha-1. On the remaining trees during the period between the ages of 32 and 40 years, basal area increased by 33%, and volume by 67%. Current volume increment was 20.7 m3ha-1 and it was concentrated on the future trees (28% of the total number of trees produces 52% of volume increment). The disproportion in the intensity of diameter and height increment after the thinning resulted in the increase of form quotient.

scholarly journals Growth Relationships in Silver Fir Stands at Their Lower-Altitude Limit in Romania

Forests ◽  
2021 ◽  
Vol 12 (4) ◽  
pp. 439
Author(s):  
Gheorghe-Marian Tudoran ◽  
Avram Cicșa ◽  
Albert Ciceu ◽  
Alexandru-Claudiu Dobre
Keyword(s):  
Basal Area ◽  
Tree Height ◽  
Silver Fir ◽  
Radial Increment ◽  
Height Increment ◽  
Lower Altitude ◽  
Volume Increment ◽  
The Mean ◽  
Annual Volume ◽  
Mean Current

This study presents the biometric relationships among various increments that is useful in both scientific and practical terms for the silvicultural of silver fir. The increments recorded in the biometric characteristics of trees are a faithful indicator of the effect of silvicultural work measures and of environmental conditions. Knowing these increments, and the relationships among them, can contribute to adaptations in silvicultural work on these stands with the purpose of reducing risks generated by environmental factors. We carried an inventory based on tree increment cores. The sample size was determined based on both radial increment and height increment variability of the trees. The sample trees were selected in proportion to their basal area on diameter categories. Current annual height increment (CAIh) was measured on felled trees from mean tree category. For CAIh we generated models based on the mean tree height. Percentages of the basal area increment and of form-height increment were used to compute the current annual volume increment percentage (PCAIv). For the mean tree, the CAIh estimated through the used models had a root-mean-square error (RMSE) of 0.8749 and for the current annual volume increment (CAIv) the RMSE value was 0.1295. In even-aged stands, the mean current volume increment tree is a hypothetical tree that may have the mean basal area of all the trees and the form-height of the stand. Conclusions: The diameter, height, and volume increments of trees are influenced by structural conditions and natural factors. The structures comprising several generations of fir mixed with beech and other deciduous trees, which have been obtained by the natural regeneration of local provenances, are stable and must become management targets. Stable structures are a condition for the sustainable management of stands.

scholarly journals Effects of selection thinning on beech tree and stand increment on Mt. Juzni Kucaj

2004 ◽  
pp. 65-78
Author(s):  
Martin Bobinac
Keyword(s):  
Basal Area ◽  
Control Area ◽  
Control Plot ◽  
Sample Plot ◽  
The Future ◽  
Beech Tree

The effects of selection thinning and spontaneous development on beech tree and stand increment were researched in the period 1986-2002. The results show the complexity of the effect of thinning on tree and stand increment. Based on the comparison of growth elements in 2002 and growth elements in 1985 before thinning, the greatest increase of total basal area (173%) and volume (269%) occurred on the control area, where 94% of trees recorded in 1985 showed increment. The lowest increase of basal area (111%) and volume (170%) occurred on the sample plot, which was thinned two times during the study period. As for the future trees, i.e. the collection of trees for comparison on the control plot, the lowest increment of basal area (198%) and volume (278%) occurred on the control plot, and a far greater increase of basal area (256% and 263%) and volume (379% and 399%) occurred on the thinned plots.

Influences of paper birch competition on growth of understory white spruce and subalpine fir following spacing

2003 ◽  
Vol 33 (10) ◽  
pp. 1962-1973 ◽  
Author(s):  
Philip G Comeau ◽  
Jian R Wang ◽  
Tony Letchford
Keyword(s):  
Picea Glauca ◽  
Volume Growth ◽  
Basal Area ◽  
White Spruce ◽  
Light Transmittance ◽  
Height Increment ◽  
Growth Responses ◽  
Subalpine Fir ◽  
Volume Increment ◽  
Paper Birch

Five years after spacing a young, 11 m tall paper birch (Betula papyrifera Marsh.) stand, we examine relationships between growth of understory white spruce (Picea glauca (Moench) Voss), subalpine fir (Abies lasiocarpa (Hook.) Nutt.), and level of birch retention. Our objectives were to evaluate the effectiveness of selected measures of competition for estimating the effects of the residual birch and to evaluate the influence of residual birch densities on growth responses of naturally regenerated subalpine fir and white spruce. Basal area of Scouler willow (Salix scouler iana Barratt) and birch were found to effectively predict light transmittance (diffuse noninterceptance). The best models for predicting 4-year volume growth of subalpine fir and white spruce incorporate initial crown volume of the subject trees and transmittance as independent variables. Lorimer's index and Hegyi's index gave similar results to those obtained using basal area and transmittance, suggesting that there is little benefit in including measurements of proximity in a competition index. For both species, the correlation between basal area increment and light was substantially stronger than observed for volume increment. However, height increment of both subalpine fir and spruce was only weakly correlated with measured light levels. The ratio of height increment to volume increment decreased with both increasing initial height and transmittance for subalpine fir and white spruce.

scholarly journals The proposition of optimal silvicultural-reclamation operations in untended beech stands of mixed origin

2004 ◽  
pp. 155-170 ◽  
Author(s):  
Milun Krstic
Keyword(s):  
Stand Structure ◽  
Basal Area ◽  
The State ◽  
Stand Development ◽  
Tree Removal ◽  
Volume Increment ◽  
Diameter Structure ◽  
Mixed Origin ◽  
State Quality ◽  
Biological Differentiation

The state, quality, spontaneous development and silvicultural demands of untended beech stands of mixed origin were studied, the age of trees in the dominant layer is about 75 years. The analysis of stand development through a 17-year period (1986-2003) included the monitoring of the elements of stand structure: Number of trees, basal area, volume, diameter and volume increment, mean stand diameter, structure, mortality and tree removal from the stand, morphological, biological and technical characteristics of trees and biological differentiation of trees. The adequate silvicultural-reclamation measures are proposed based on the identified stand state.

Obecny stan badań nad Zagładą na Ukrainie

2014 ◽  
pp. 889-915
Author(s):  
Anna Abakunkova
Keyword(s):  
Future Development ◽  
The State ◽  
Significant Part ◽  
Educational Organizations ◽  
Major Research ◽  
Holocaust Studies ◽  
The Holocaust ◽  
The Future

The article examines the state of the Holocaust historiography in Ukraine for the period of 2010 – beginning of 2014. The review analyzes activities of major research and educational organizations in Ukraine which have significant part of projects devoted to the Holocaust; main publications and discussions on the Holocaust in Ukraine, including publications of Ukrainian authors in academic European and American journals. The article illustrates contemporary tendencies and conditions of the Holocaust Studies in Ukraine, defines major problems and shows perspectives of the future development of the Holocaust historiography in Ukraine.

Collective Memory: Between Values and Historical Knowledge

2020 ◽  
pp. 124-142
Author(s):  
VICTOR BURLACHUK
Keyword(s):  
Twentieth Century ◽  
Soviet Union ◽  
Collective Memory ◽  
Rapid Change ◽  
Modern Society ◽  
The State ◽  
Main Element ◽  
Rapid Decline ◽  
The Past ◽  
The Future

At the end of the twentieth century, questions of a secondary nature suddenly became topical: what do we remember and who owns the memory? Memory as one of the mental characteristics of an individual’s activity is complemented by the concept of collective memory, which requires a different method of analysis than the activity of a separate individual. In the 1970s, a situation arose that gave rise to the so-called "historical politics" or "memory politics." If philosophical studies of memory problems of the 30’s and 40’s of the twentieth century were focused mainly on the peculiarities of perception of the past in the individual and collective consciousness and did not go beyond scientific discussions, then half a century later the situation has changed dramatically. The problem of memory has found its political sound: historians and sociologists, politicians and representatives of the media have entered the discourse on memory. Modern society, including all social, ethnic and family groups, has undergone a profound change in the traditional attitude towards the past, which has been associated with changes in the structure of government. In connection with the discrediting of the Soviet Union, the rapid decline of the Communist Party and its ideology, there was a collapse of Marxism, which provided for a certain model of time and history. The end of the revolutionary idea, a powerful vector that indicated the direction of historical time into the future, inevitably led to a rapid change in perception of the past. Three models of the future, which, according to Pierre Nora, defined the face of the past (the future as a restoration of the past, the future as progress and the future as a revolution) that existed until recently, have now lost their relevance. Today, absolute uncertainty hangs over the future. The inability to predict the future poses certain challenges to the present. The end of any teleology of history imposes on the present a debt of memory. Features of the life of memory, the specifics of its state and functioning directly affect the state of identity, both personal and collective. Distortion of memory, its incorrect work, and its ideological manipulation can give rise to an identity crisis. The memorial phenomenon is a certain political resource in a situation of severe socio-political breaks and changes. In the conditions of the economic crisis and in the absence of a real and clear program for future development, the state often seeks to turn memory into the main element of national consolidation.

Asymmetries of Spatial Contestations

Contention ◽  
2020 ◽  
Vol 8 (1) ◽  
pp. 49-69 ◽  
Author(s):  
Tareq Sydiq
Keyword(s):  
The State ◽  
The Social ◽  
The Future

Based on fieldwork carried out from 2017 and 2018, this article examines various attempts to both organize publicly and disrupt such attempts during the Iranian protests during that time. It argues that interference with spatial realities influenced the social coalitions built during the protests, impacting the capacity of actors to build such coalitions. The post-2009 adaptation of the state inhibited cross-class coalitions despite being challenged, while actors used spatial phrasing indicating they perceived spatial divisions to emulate political ones. Meanwhile, in the immediate aftermath of the December 2017 protests, further attempts to control protest actions impacted not only those who would be able to participate in such events in the future, but also those who felt represented by them and who would be likely to sympathize with them. Based on the spatial conditions under which coalitions form, I argue that asymmetrical contestations of spatiality determined the outcome of the December 2017 protests and may contribute to an understanding of how alliances in Iran will form in the future.

Comparative characteristics of educational stress and mental health of senior medicine students at different universities (results of an interregional study)

2020 ◽  
pp. 34-46
Author(s):  
Victoria Ruzhenkova ◽  
Irina Sheremet’eva ◽  
Viktor Ruzhenkov
Keyword(s):  
Mental Health ◽  
Medical Students ◽  
The State ◽  
Panic Attacks ◽  
Stress Factors ◽  
Anxiety And Depression ◽  
State University ◽  
The Future ◽  
Training Stress ◽  
Medical University

Stress negatively affects the mental health of students, causes anxiety and depression, leads to poor academic performance, lowers level of professional training and success in the future. The purpose of the research is to study the state of mental health of medical students to develop recommendations for the prevention of maladaptation. Materials and methods. 252 5-year students aged 20–29 (22 ± 1,1) years, 168 (66,7 %) females and 84 (33,3 %) males (137 students of Belgorod State University and 115 of Altay State Medical University (ASMU)) were examined by medico-sociological and psychometric methods. Results. It was established that every fifth student of the Belgorod State University and every third of the ASMU did not enter the medical university on their own initiative. Less than half (43 %) of Belgorod State University students and 30.4 % of the ASMU ones are convinced that the choice of profession was correct, 35 and 37.4 % are, consequently, completely disappointed with it. Students of Belgorod State University dealt with training stress factors poorer and, as a result, have more pronounced mental symptoms of training stress, difficulties in organizing the daily regimen, irregular nutrition, and fear of the future. Regardless of the region of studying, the number of students not committed to the medical profession, after 5 years of study, is more than 3 times higher among those who enter the university not on their own initiative. Students of the ASMU hit substances, skipped classes, played computer games and took sedative drugs more often to overcome academic stress. The degree of anxiety before the exams in students of Belgorod State University was higher (9 points) than in their peers from the State Medical University (7 points). An extremely high (8–10 points) level of anxiety before exams was characteristic of 75,9 and 44,3 % of students, respectively. The former were more likely to experience clinically significant panic attacks: 27,7 and 6,1 %. Conclusion. Given the high incidence of social phobia (19,1–24,1 %), depression (22,6–32,2 %) and anxiety (21,9– 27,8 %) among medical students, the development and implementation of psycho-correctional programs aimed at the formation of adaptive ways to overcome stress, reduce anxiety and depression is required. This will prevent the development of psychosomatic disorders and addictions.

PANCASILA DAN IDENTITAS KE-INDONESIA-AN: Sebuah Catatan Krisis

2018 ◽  
Vol 16 (2) ◽  
pp. 43
Author(s):  
Muchid Albintani
Keyword(s):  
Political Party ◽  
Direct Democracy ◽  
Identity Crisis ◽  
The State ◽  
The Future ◽  
Electoral Regime ◽  
National Consensus

The term there is no legislation under development of Pancasila as the basis of the state, but theposition of Pancasila is unshakeable. The anti-Pancasila attitude must also be anti-diversity that can live as a nation and a state [national crises]. Without affirmation or not in the legislation, Pancasila is the ‘foundation and ideology of the state’. Based on the fact that there is irrelevant when the question arises, whether Pancasila is still needed as the basis of state and nation, or is Pancasila still needed as a source of national law that explicitly needs to be affirmed into the1945 Constitution and the sanctions of Pancasila tabulatively? This paper is an assertion of [reinforcement] of the Pencasila as an ideology into the 1945 Constitution or not, highly dependent on the winning electoral regime and the ‘election-winning political party’. Pancasila as ‘the foundation and ideology of the state’ becomes the determinant of ‘as close as the regime of the results of the practice of direct democracy’. Therefore, the affirmation of the essentials in building a lasting and harmonious life of fellow children of the nation in the future. Recognizing the reintroduction of the Indonesia’s identity of essence of Pancasila as the ideology of nation and state is based on ‘national consensus’. This awareness is resilient, so that a country that has been established for more than 73 years does not experience an identity crisis. 

A Brief Statement on the Future of Public Scholarship and the Research Methods Landscape

2019 ◽  
pp. 700-707
Author(s):  
Patricia Leavy
Keyword(s):  
Research Methods ◽  
Teaching Practices ◽  
Knowledge Building ◽  
Research Community ◽  
The State ◽  
Public Scholarship ◽  
Institutional Structures ◽  
The Future ◽  
Book Editor

The book editor offers some final comments about the state of the field and promise for the future. Leavy suggests researchers consider using the language of “shapes” to talk about the forms their research takes and to highlight the ongoing role of the research community in shaping knowledge-building practices. She reviews the challenges and rewards of taking your work public. Leavy concludes by noting that institutional structures need to evolve their rewards criteria in order to meet the demands of practicing contemporary research and suggests that professors update their teaching practices to bring the audiences of research into the forefront of discussions of methodology.

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