scholarly journals Synchronized flutter of two slender flags

2016 ◽  
Vol 801 ◽  
pp. 652-669 ◽  
Author(s):  
Jérôme Mougel ◽  
Olivier Doaré ◽  
Sébastien Michelin
Keyword(s):  
Large Amplitude ◽  
Axial Flow ◽  
Coupled Dynamics ◽  
Hydrodynamic Coupling ◽  
Close Proximity ◽  
Long Time ◽  
Dynamical Properties ◽  
Body Theory ◽  
Selection Of

The interactions and synchronization of two parallel and slender flags in a uniform axial flow are studied in the present paper by generalizing Lighthill’s elongated body theory (EBT) and Lighthill’s large-amplitude elongated body theory (LAEBT) to account for the hydrodynamic coupling between flags. The proposed method consists of two successive steps, namely the reconstruction of the flow created by a flapping flag within the LAEBT framework and the computation of the fluid force generated by this non-uniform flow on the second flag. In the limit of slender flags in close proximity, we show that the effect of the wakes has little influence on the long-time coupled dynamics and can be neglected in the modelling. This provides a simplified framework extending LAEBT to the coupled dynamics of two flags. Using this simplified model, both linear and large-amplitude results are reported to explore the selection of the flapping regime as well as the dynamical properties of two side-by-side slender flags. Hydrodynamic coupling of the two flags is observed to destabilize the flags for most parameters, and to induce a long-term synchronization of the flags, either in-phase or out-of-phase.

scholarly journals Long-Term Brightness Changes in Cool Pulsating Variables

1993 ◽  
Vol 139 ◽  
pp. 425-427
Author(s):  
John R. Percy
Keyword(s):  
Time Scales ◽  
Large Amplitude ◽  
Variable Star ◽  
American Association ◽  
Long Term Changes ◽  
Long Time ◽  
Red Giant

AbstractSeveral types of cool pulsating variables show unexplained long-term changes in brightness, typically on time scales of 10 to 20 times the basic (pulsational) period. The visual and photoelectric programs of the American Association of Variable Star Observers (AAVSO) are well-suited for detecting and studying these changes. Some examples are given here, including yellow hypergiants, RV Tauri stars, small- and large-amplitude red giant and super giant variables. The study of pulsating variables on long time scales provides “new perspectives” on their behavior.

scholarly journals Archives Management and Permanent Storage of Documents

Atlanti ◽  
2015 ◽  
Vol 25 (1) ◽  
pp. 153-161
Author(s):  
Fikrie Berisha
Keyword(s):  
Entire Area ◽  
Digital Documents ◽  
Digital Network ◽  
Archival Documents ◽  
Long Time ◽  
Permanent Storage ◽  
Digital Document ◽  
The Moment ◽  
Selection Of

Modern digital archives are modern archives which in big computer devices (servers), preserve archived original document overlooking the moment is produced. Archives in Kosovo assessment of archival documents make in two directions. First; selection of classical documents (on paper) with the value to be transformed into digital documents, and second; selection of contemporary documents produced by institutions of computer and internet era. Management of these digital documents requires procedures and professional standards for its storage and processing by the archive, in order to be ready to serve researchers and interested parties. Access to digital documents should be fast, simple procedures, providing documentation from the penetration of ‘hackers’ and people badly intention. To fulfil its mission digital document should ensure and complement the appearance of the original document. Since the user does not have the option of intervention and change in the document. Should work in protect emblem, which protects the entire area of the document in the form of molten seal, which also shows the ownership of certain archive. Safety documentation and document base by external users will be able to organize, deposit and stored at three levels: Server (1) be stored (saved) archival documents for use by the applicant; Server (2) stored data of the first and simultaneously updates added by continuous processing of new documents; and Server (3) is not accessible from outside through digital network, but stored all digital archive documentation and from here there should be no often exit. In Server 3 only entered document and stored as recent bank. From there, the document will be drawn only if it is missing or damaged document on server 1 and 2.Thus, through this categorization could be provided for long time electronic documents (digital), until to new modern inventions of modern digitalization technology that would ensure the preservation of documents for the ‘real’ long-term or permanent time.

scholarly journals Analysis of Long-Term Measured Exterior Air Temperature in Zilina

2018 ◽  
Vol 14 (2) ◽  
pp. 124-131 ◽  
Author(s):  
Daniela Jurasova
Keyword(s):  
Climate Change ◽  
Temperature Measurement ◽  
Air Temperature ◽  
Weather Data ◽  
Time Data ◽  
Long Time ◽  
Experimental Laboratory ◽  
Weather Stations ◽  
Selection Of

Abstract The climate change assumes nowadays on significance. Weather data may be available on various time scales – long-term, minutes, hours, days, periods, years. Measurements of air temperature are realized for a long time. Data in Slovakia are available from few weather stations of Slovak Hydrometeorological Institute (SHMI). For long-term and wide-ranging measurement of various parameters this can be complicated and expensive. This paper is focused on temperature measurement near the experimental laboratory. Estimation of daily, monthly and yearly mean temperatures is done in different ways. Results from experimental temperature measurement, in a way of selection of unusual extremes are presented. Shorter recording intervals describe the temperature courses in a more pertinent way.

After the Dance is over: Some Issues and Suggestions for Follow-up Assessment in Behavior Therapy

1977 ◽  
Vol 41 (3_suppl) ◽  
pp. 1287-1308 ◽  
Author(s):  
Eric J. Mash ◽  
Leif G. Terdal
Keyword(s):  
Behavior Therapy ◽  
Intervention Programs ◽  
Long Term Effects ◽  
Long Time ◽  
Time Periods ◽  
Research Recommendations ◽  
Selection Of

Behavioral intervention programs have thus far failed to provide sufficient follow-up information for the evaluation of long-term effects. This omission is believed to be related to an inadequate conceptualization of follow-up assessment, as well as to the methodological and practical difficulties inherent in assessing behavior over long time periods. A framework for follow-up assessment that is consistent with current behavioral efforts to program generalization is described and is contrasted with traditional views of follow-up that look for effects following the termination of treatment. Several methodological features of follow-up assessment are discussed, along with research recommendations, including the determination of length of appropriate follow-up intervals, the frequency of follow-up assessments, the need for standardization of measures both within and between studies, reactivity of follow-up assessment, the selection of follow-up measures and attrition of subjects.

scholarly journals Relevant criteria for the selection of cryotubes. Experiences from the German National Cohort

2019 ◽  
Vol 43 (6) ◽  
pp. 339-345 ◽  
Author(s):  
Astrid Petersmann ◽  
Theresa Winter ◽  
Sophia Lamp ◽  
Matthias Nauck
Keyword(s):  
Life Sciences ◽  
German National Cohort ◽  
Mechanical Handling ◽  
Long Time ◽  
National Cohort ◽  
Time Periods ◽  
Selection Of

Abstract Background The storage of different biomaterials over long time periods is one of the main requirements of biobanking ensuring that modifications in the composition or any other change of the biomaterials have to be avoided. In the German National Cohort samples from around 200,000 participants are processed and stored long term. Methods A tender for cryotubes and racks was performed in 2013 setting up several characteristics that were judged against each other. Tubes and racks were evaluated regarding the performance and handling in connection with the main biorepository. With a 5-year experience using the selected tubes we are able to reflect some of the criteria of the tender. Results At the end of the decision, the former company FluidX, in the meantime taken over from Brooks (Brooks Life Sciences, Manchester, UK), received the order. The experience with the external testing of the tube was useful. Conclusions Overall, the experience with the cryotubes is good and their mechanical handling at the different sites is routine in the meantime. There are some aspects that we recommend for future tenders. Further research is necessary to learn more about the cryotubes and the labware in general in the field of biobanking to store our samples as safely as possible.

scholarly journals INFLUENCE OF FAT CELLS ON PATHOGENETIC LINKS OF INFLAMMATION MECHANISMS IN PATIENTS WITH PURIFIC WOUNDS THAT DO NOT HEAL FOR A LONG TIME

2020 ◽  
pp. 43-46
Author(s):  
K. A. Goltsev ◽  
I. A. Krivoruchko ◽  
A. M. Goltsev ◽  
K. Yu. Parkhomenko ◽  
V. M. Cheverda
Keyword(s):  
World Literature ◽  
Molecular Mechanisms ◽  
Healing Process ◽  
Fat Cells ◽  
Effective Solution ◽  
Intercellular Interaction ◽  
Long Time ◽  
Healing Wounds ◽  
Selection Of

Summary. The purpose of the study is - study of sources of domestic and world literature on the problem of pathophysiological disorders of local homeostasis involving mast cells (МC) in purulent long-term non-healing wounds (PLTNHW). Research tasks — according to the literature, to identify the features of the course of the wound process and the possibility of regulating local homeostasis with the participation of MC in patients with PLTNHW. Conclusions. Thus, considerable progress has been made so far in understanding the molecular mechanisms of the basic phases of the normal and complicated wound process. A new step towards effective solution of the socially significant problem of surgical treatment of extensive wound defects in PLTNHW is further study of the processes of direct intercellular interaction and selection of tryptase and chymase MC as indicators of the state of the healing process and a target for pathogenetic action.

Enhancing the power generation of Rhodopseudomonas palustris-based MFC

2020 ◽  
Vol 64 (1-4) ◽  
pp. 1261-1268
Author(s):  
Shu Otani ◽  
Dang-Trang Nguyen ◽  
Kozo Taguchi
Keyword(s):  
Activated Carbon ◽  
Rhodopseudomonas Palustris ◽  
Ozone Treatment ◽  
Maximum Power Density ◽  
On Demand ◽  
Long Time ◽  
Dry Conditions ◽  
Carbon Sheet ◽  
Uv Ozone

In this study, a portable and disposable paper-based microbial fuel cell (MFC) was fabricated. The MFC was powered by Rhodopseudomonas palustris bacteria (R. palustris). An activated carbon sheet-based anode pre-loaded organic matter (starch) and R. palustris was used. By using starch in the anode, R. palustris-loaded on the anode could be preserved for a long time in dry conditions. The MFC could generate electricity on-demand activated by adding water to the anode. The activated carbon sheet anode was treated by UV-ozone treatment to remove impurities and to improve its hydrophilicity before being loaded with R. palustris. The developed MFC could generate the maximum power density of 0.9 μW/cm2 and could be preserved for long-term usage with little performance degradation (10% after four weeks).

Women's Participation in Politics: Ukrainian Case

2014 ◽  
Vol 2013 (3) ◽  
pp. 53-66
Author(s):  
Skovikov Alexey
Keyword(s):  
Political Culture ◽  
Separation Of Powers ◽  
Party Competition ◽  
Political Life ◽  
Ruling Class ◽  
Political Actors ◽  
Women's Participation ◽  
Democratic Transformation ◽  
Selection Of

AbstractThe international practices takes into account the question of women's participation in the political life of modern Ukraine. The selection of the state was due to the dynamic process of democratic transformation - the separation of powers, the formation of multi-party competition among political actors in the electoral process, the activity women in the various institutions of civil society. The position was claimed on the basis of empirical data range of academic institutions and reputable sociological centers, and also interviews with experts who said that the creation of real conditions for self-realization by women's interest in politics is only possible for long term. The process is controversial and caused by political culture, traditions and interests of the ruling class represented mainly by men.

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