A Study on te Determination of Fire Origin at the Burned Out Fire Site : KT Ahyeon Branch Underground Communications Cable Tunnel Fire Focusing on Environmental Conditions and Fire Spread

2020 ◽  
Vol 11 (1) ◽  
pp. 37-60
Author(s):  
Sang-Yeul Lee ◽  
◽  
Jae-Seong An ◽  
Yeong-Byeong Lee ◽  
Jeong-Hyeon Kim ◽  
...  
Keyword(s):  
Environmental Conditions ◽  
Fire Spread ◽  
Tunnel Fire ◽  
Fire Origin ◽  
Underground Communications

scholarly journals Phylogenetic Core Groups: a promising concept in search of a consistent methodological framework

Microbiome ◽  
2021 ◽  
Vol 9 (1) ◽  
Author(s):  
Alberto Pascual-García
Keyword(s):  
Microbial Communities ◽  
Microbial Ecology ◽  
Environmental Conditions ◽  
The Novel ◽  
Methodological Framework ◽  
Operational Taxonomic Units ◽  
Traditional Classification ◽  
Taxonomical Classification ◽  
Novel Concept

AbstractIn this comment, we analyse the conceptual framework proposed by Aguirre de Cárcer (Microbiome 7:142, 2019), introducing the novel concept of Phylogenetic Core Groups (PCGs). This notion aims to complement the traditional classification in operational taxonomic units (OTUs), widely used in microbial ecology, to provide a more intrinsic taxonomical classification which avoids the use of pre-determined thresholds. However, to introduce this concept, the author frames his proposal in a wider theoretical framework based on a conceptualization of selection that we argue is a tautology. This blurs the subsequent formulation of an assembly principle for microbial communities, favouring that some contradictory examples introduced to support the framework appear aligned in their conclusions. And more importantly, under this framework and its derived methodology, it is not possible to infer PCGs from data in a consistent way. We reanalyse the proposal to identify its logical and methodological flaws and, through the analysis of synthetic scenarios, we propose a number of methodological refinements to contribute towards the determination of PCGs in a consistent way. We hope our analysis will promote the exploration of PCGs as a potentially valuable tool, helping to bridge the gap between environmental conditions and community composition in microbial ecology.

Performances of the Radiello diffusive sampler for BTEX measurements: Influence of environmental conditions and determination of modelled sampling rates

2005 ◽  
Vol 39 (14) ◽  
pp. 2535-2544 ◽  
Author(s):  
A PENNEQUINCARDINAL ◽  
H PLAISANCE ◽  
N LOCOGE ◽  
O RAMALHO ◽  
S KIRCHNER ◽  
...  
Keyword(s):  
Environmental Conditions ◽  
Diffusive Sampler

scholarly journals Peat decomposition – shaping factors, significance in environmental studies and methods of determination; a literature review

Geologos ◽  
2016 ◽  
Vol 22 (1) ◽  
pp. 61-69 ◽  
Author(s):  
Danuta Drzymulska
Keyword(s):  
Chemical Composition ◽  
Literature Review ◽  
Ground Water ◽  
Environmental Conditions ◽  
Meteoric Water ◽  
Climatic Conditions ◽  
Review Of Literature ◽  
Forming Process ◽  
Physical And Chemical

Abstract A review of literature data on the degree of peat decomposition – an important parameter that yields data on environmental conditions during the peat-forming process, i.e., humidity of the mire surface, is presented. A decrease in the rate of peat decomposition indicates a rise of the ground water table. In the case of bogs, which receive exclusively atmospheric (meteoric) water, data on changes in the wetness of past mire surfaces could even be treated as data on past climates. Different factors shaping the process of peat decomposition are also discussed, such as humidity of the substratum and climatic conditions, as well as the chemical composition of peat-forming plants. Methods for the determination of the degree of peat decomposition are also outlined, maintaining the division into field and laboratory analyses. Among the latter are methods based on physical and chemical features of peat and microscopic methods. Comparisons of results obtained by different methods can occasionally be difficult, which may be ascribed to different experience of researchers or the chemically undefined nature of many analyses of humification.

Determination of Optimum Instances and Duration of Rest Periods for Strenuous Manual Work

1978 ◽  
Vol 22 (1) ◽  
pp. 22-22
Author(s):  
Dileep R. Sule
Keyword(s):  
Environmental Conditions ◽  
Manual Work ◽  
Rest Periods ◽  
Hours Of Work ◽  
The Hours ◽  
Rest Breaks

Since the beginning of recorded history, man has been concerned about work-rest cycles. Studies of industrial fatigue date back to 1893 when the hours of work were reduced from 54 to 48 hours a week. Further reductions have brought us to a 40-hour work week with five days of work and two days of rest. Management recognizes the value of rest breaks and normally provides these in accordance with the type labor performed and environmental conditions.

scholarly journals The influence of geometrical parameters of the forming channel on the boundary value of the axial force in the agglomeration process of dry ice

2019 ◽  
Vol 254 ◽  
pp. 05001 ◽  
Author(s):  
Jan Górecki ◽  
Ireneusz Malujda ◽  
Dominik Wilczyński
Keyword(s):  
Carbon Dioxide ◽  
Low Temperature ◽  
Axial Force ◽  
Environmental Conditions ◽  
Main Parameter ◽  
Geometrical Parameters ◽  
Dry Ice ◽  
Agglomeration Process ◽  
Boundary Force

The article presents the results of study on the influence of geometrical parameters of the forming channels on axial force which is the main parameter of the agglomeration process of dry ice in the piston method. During research, the material was agglomerated utilizing different dies. The material is characterized by low temperature and sublimation under standard environmental conditions. The study focuses on determining the influence of geometrical parameters of the conical and cylindrical sections of the forming chamber which influence the value of yield stress in the carbon dioxide agglomeration process. The determination of the value of boundary force is the basis for formulating the construction assumptions which shall be the basis for designing and constructing the dry ice compaction and pelletization machine.

scholarly journals Determination of Grain Size and Resistance to Corrosion of Stainless Steel Welded Pipes

2017 ◽  
Vol 65 (1) ◽  
pp. 25-33
Author(s):  
Pavel Hudeček ◽  
Petr Dostál
Keyword(s):  
Grain Size ◽  
Stainless Steel ◽  
High Temperature ◽  
Surface Treatment ◽  
Environmental Conditions ◽  
Basic Step ◽  
Human Errors ◽  
Weld Root ◽  
Made In

Discover problems of welds is not so easy from time to time. Specially, If welding was made in rough environmental conditions such as high temperature, humidity and dusty wind. It is necessary to provide good conditions to realize basic step of welding. For welding, have been used welding procedures specification and procedure qualification record. However, difficult conditions, documentations rightness or human errors are always here. Common weld defects like cracks, porosity, lack of penetration and distortion can compromise the strength of the base metal, as well as the integrity of the weld. According of site inspection, there were suspicion of intercrystalline corrosion, inclusions, leaker or segregation in root of weld, root weld stretches to the pipe inside, the welded pipes are not in axially level, the not proper surface treatment after welding and keep the intervals between single welds to not overheat the pipes.

scholarly journals Changes in prevalence and abundance of parasitic invasions in sheep at various physiological stages

2017 ◽  
Vol 73 (11) ◽  
pp. 713-716
Author(s):  
Paulina Dudko ◽  
Andrzej Junkuszew ◽  
Krzysztof Tomczuk
Keyword(s):  
Environmental Conditions ◽  
Management System ◽  
Animal Husbandry ◽  
Gastrointestinal Parasites ◽  
The Other ◽  
Prevention Strategies ◽  
Pasture Management ◽  
Study Material ◽  
Other Hand

The aim of the study was to determine the degree of parasitic invasion at various physiological stages, as well as tracing the dynamics of parasitic invasions in a flock of sheep kept in the combined indoor-pasture management system. The observations were performed on 224 mother ewes of the synthetic SCP prolific meat line over the course of two years. The animals were kept in the combined indoor-pasture management system with uniform feeding and environmental conditions and were under continuous animal husbandry and veterinary supervision. The ewes participating in the experiment were not wormed in the year preceding the experiment and during the observations. The experiment involved parasitologic tests aimed at the determination of abundance and prevalence of invasions of gastrointestinal parasites in mother ewes. The study material was faeces collected from the rectum in the following stages: pregnancy (November), day 2, 28, 42 and 56 after lambing, drying off (day 100 after lambing) and rest (between dry-off and mating). In the analysis of the results of the study it can be noted that, in most cases, the highest prevalence and abundance levels are observed in the infertility period. Moreover, the period of pregnancy and lambing was a crucial one. On the other hand, the lowest abundance and prevalence levels in the majority of cases were observed on day 28 and 42 after lambing. The results of the study should be taken into consideration during the development of prevention strategies limiting parasitic invasions in sheep flocks. Adjusting chemotherapy to the most important periods of parasitic invasions will enable a more efficient fight against parasites. It should also reduce the excessive use of chemical preparations, which is crucial due to the increasing resistance of parasites. Apart from the aforementioned actions, farmers should pay attention to supporting immunity by means of feed, especially in the periods of highest vulnerability to invasions. Such actions should lead to the reduction of losses caused by parasitic invasions in sheep flocks.

scholarly journals A Study on Determination of Fire Origin by Shadow analysis

2014 ◽  
Vol 16 (3) ◽  
pp. 165-173 ◽  
Author(s):  
Seunghun Lee ◽  
Minki Choi ◽  
Donmook Choi
Keyword(s):  
Fire Origin
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