scholarly journals Analysis of Morphological Characteristics of Collapsed Reservoirs in Korea

2020 ◽  
Vol 20 (5) ◽  
pp. 207-216
Author(s):  
Donghyun Kim ◽  
Jongsung Kim ◽  
Wonjoon Wang ◽  
Joonseok Lee ◽  
Jaewon Jung ◽  
...  
Keyword(s):  
Cluster Analysis ◽  
Water Depth ◽  
Storage Capacity ◽  
Morphological Characteristics ◽  
Group A ◽  
In Parenthesis ◽  
The Given ◽  
Basin Area ◽  
Shallow Water Depth ◽  
Levee Height

The purpose of this study is to analyze the basic specifications or items of 17,313 reservoirs distributed throughout Korea and in particular, to establish the relationships among the morphological characteristics of the reservoirs. In addition, the morphology index, the storage (S)–area of full water (A)–levee height (H) (S–A–H) relationship, and the storage(S)–area of full water (A) (S–A) relationship were determined for collapsed reservoirs. In this study, histograms for 11 parameters, such as storage capacity, area of full water, levee height, and basin area, were plotted, and the distributions of the reservoir parameters were examined. The morphology index was used to classify the reservoirs based on the depth, and the coefficient values of the relationships of S–A–H and S–A were used to compare S with both A and H or only A. The coefficient value of S–A–H was inversely proportional to S, and when the coefficient value was high, the storage was small. The coefficient value of S–A was proportional to S, and when the coefficient value was small, the storage wassmall. Cluster analysis was performed based on the given items to determine the characteristics of all the reservoirs and only the collapsed reservoirs. From the cluster analysis results, the reservoirs were divided into five groups: A, B, C, D, and E. There were 7,714 (14) in Group A, 6,053 (4) in B, 2,633 (2) in C, 745 (1) in D, and 168 (0) in E for all the reservoirs and collapsed reservoirs (with the values of the collapsed reservoirs in parenthesis). The morphological indexes werelow in the order of A > B > C > D > E, and the coefficient values of S–A–H were high in the order of A > B > C > E > D. The coefficient values of S–A were low in the order of A > B > D > C > E. Based on the clustered analysis results for 21 collapsed reservoirs, the reservoirs were clustered in the order of A (14) > B (4) > C (2) > D (1) > E (0). A reservoir with shallow water depth and small storage capacity has an inherent probability of collapsing. Therefore, the results of this study are useful for reservoir management and operation, as well as for the prevention of reservoir collapse.

scholarly journals An Approach toward the Development of a Functional Encoding Model of Short Term Memory during Reading

1978 ◽  
Vol 10 (2) ◽  
pp. 141-148
Author(s):  
Mary Anne Herndon
Keyword(s):  
Cluster Analysis ◽  
Storage Capacity ◽  
Short Term Memory ◽  
Long Term Memory ◽  
Short Term ◽  
Processing Efficiency ◽  
Term Memory ◽  
Information Unit ◽  
Subsequent Storage

In a model of the functioning of short term memory, the encoding of information for subsequent storage in long term memory is simulated. In the encoding process, semantically equivalent paragraphs are detected for recombination into a macro information unit. This recombination process can be used to relieve the limited storage capacity constraint of short term memory and subsequently increase processing efficiency. The results of the simulation give a favorable indication of the success for the use of cluster analysis as a tool to simulate the encoding function in the detection of semantically similar paragraphs.

Stability of offshore structures in shallow water depth

2011 ◽  
Vol 2 (2) ◽  
pp. 320-333
Author(s):  
F. Van den Abeele ◽  
J. Vande Voorde
Keyword(s):  
Shallow Water ◽  
Water Depth ◽  
Fossil Fuels ◽  
Oil And Gas ◽  
Structural Response ◽  
Offshore Structures ◽  
Exploration And Production ◽  
Subsea Pipelines ◽  
Wave Induced ◽  
Shallow Water Depth

The worldwide demand for energy, and in particular fossil fuels, keeps pushing the boundaries of offshoreengineering. Oil and gas majors are conducting their exploration and production activities in remotelocations and water depths exceeding 3000 meters. Such challenging conditions call for enhancedengineering techniques to cope with the risks of collapse, fatigue and pressure containment.On the other hand, offshore structures in shallow water depth (up to 100 meter) require a different anddedicated approach. Such structures are less prone to unstable collapse, but are often subjected to higherflow velocities, induced by both tides and waves. In this paper, numerical tools and utilities to study thestability of offshore structures in shallow water depth are reviewed, and three case studies are provided.First, the Coupled Eulerian Lagrangian (CEL) approach is demonstrated to combine the effects of fluid flowon the structural response of offshore structures. This approach is used to predict fluid flow aroundsubmersible platforms and jack-up rigs.Then, a Computational Fluid Dynamics (CFD) analysis is performed to calculate the turbulent Von Karmanstreet in the wake of subsea structures. At higher Reynolds numbers, this turbulent flow can give rise tovortex shedding and hence cyclic loading. Fluid structure interaction is applied to investigate the dynamicsof submarine risers, and evaluate the susceptibility of vortex induced vibrations.As a third case study, a hydrodynamic analysis is conducted to assess the combined effects of steadycurrent and oscillatory wave-induced flow on submerged structures. At the end of this paper, such ananalysis is performed to calculate drag, lift and inertia forces on partially buried subsea pipelines.

Convergence of management practices in India’s IT sector with ana priorivalidation

2018 ◽  
Vol 12 (4) ◽  
pp. 402-421
Author(s):  
Jayashree Mahesh ◽  
Anil K. Bhat
Keyword(s):  
Cluster Analysis ◽  
Operations Management ◽  
Management Practices ◽  
Qualitative Interviews ◽  
A Priori ◽  
Statistical Testing ◽  
Content Type ◽  
Empirical Survey ◽  
Different Types ◽  
Group A

PurposeThe purpose of this paper is to document similarities and differences between management practices of different types of organizations in India’s IT sector through an empirical survey. The authors expected these differences to be significant enough for us to be able to groupa priorithis set of companies meaningfully through cluster analysis on the basis of the similarity of their management practices alone.Design/methodology/approachUsing a mixed-methods approach, 73 senior-level executives of companies working in India’s IT sector were approached with a pretested questionnaire to find out differences on eighteen management practices in the areas of operations management, monitoring management, targets management and talent management. The different types of organizations surveyed were small and amp; medium global multinationals, large global multinationals, small and medium Indian multinationals, large Indian multinationals and small and medium local Indian companies. The differences and similarities found through statistical testing were further validateda priorithrough cluster analysis and qualitative interviews with senior-level executives.FindingsThe management practices of multinationals in India are moving toward Western management practices, indicating that management practices converge as the organizations grow in size. Though the practices of large Indian multinationals were not significantly different from those of global multinationals, the surprising finding was that large Indian multinationals scored better than global multinationals on a few practices. The practices of small and medium Indian companies differed significantly from those of other types of organizations and hence they formed a cluster.Practical implicationsThe finding that large Indian IT multinationals have an edge over global multinationals in certain people management practices is a confirmation of the role of human resource practices in their current success and their continuing competitive advantage.Originality/valueThis is perhaps the first study of its kind to document state of specific management practices across different types of organizations in India’s IT sector and then use measures on these practices to group a priori these organizations for validation.

scholarly journals Measurement of Genetic Diversity of Chinese Seashore Paspalum Resources through Morphological and Sequence-related Amplified Polymorphism Analysis

2019 ◽  
Vol 144 (6) ◽  
pp. 379-386
Author(s):  
Yan Liu ◽  
Hailin Guo ◽  
Yi Wang ◽  
Jingang Shi ◽  
Dandan Li ◽  
...  
Keyword(s):  
United States ◽  
Genetic Diversity ◽  
Cluster Analysis ◽  
Genetic Variation ◽  
Genetic Distance ◽  
Morphological Characteristics ◽  
The United States ◽  
Germplasm Resources ◽  
Seashore Paspalum ◽  
Chinese Germplasm

Seashore paspalum (Paspalum vaginatum) is a notable warm-season turfgrass. Certain germplasm resources are distributed in the southern regions of China. The objectives of this study were to investigate the genetic diversity and genetic variation of Chinese seashore paspalum resources. Morphological characteristics and sequence-related amplified polymorphism (SRAP) markers were used to assess genetic relationships and genetic variation among 36 germplasm resources from China and six cultivars from the United States. The results showed significant variation for 13 morphological characteristics among 42 tested seashore paspalum accessions, and that the phenotypic cv was, in turn, turf height > turf density > internode length > inflorescence density > leaf width > reproductive branch height > spikelet width > leaf length > spikelet number > inflorescence length > internode diameter > inflorescence width > spikelet length. According to the morphological characteristics and cluster analysis, 42 seashore paspalum accessions were divided into six morphological types. In total, 374 clear bands were amplified using 30 SRAP primer combinations; among these bands, 321 were polymorphic with 85.83% polymorphism. SRAP marker cluster analysis showed that 42 seashore paspalum accessions were grouped into seven major groups, with a genetic similarity coefficient ranging from 0.4385 to 0.9893 and genetic distance values ranging from 0.0108 to 0.8244. The high level of genetic diversity occurred among Chinese germplasm, and the genetic distance was relatively high between Chinese germplasm and cultivars introduced from the United States. The patterns in morphological trait variations and genetic diversity will be useful for the further exploitation and use of Chinese seashore paspalum resources.

Detection of biodiversity local centers and gradients of change of Dolichopodidae (Diptera) in East Asia

2021 ◽  
Vol 28 (1) ◽  
Author(s):  
IGOR GRICHANOV ◽  
MARIYA CHURSINA ◽  
MENGQING WANG
Keyword(s):  
Cluster Analysis ◽  
East Asia ◽  
Mathematical Analysis ◽  
East Asian ◽  
Species Number ◽  
Russian Regions ◽  
Biodiversity Indices ◽  
Group A ◽  
Group B ◽  
Total Species

The dolichopodid fauna of continental Chinese and Russian regions belonging to the East Palaearctic have been selected for a comparative diversity investigation. We gathered information about 654 species of long-legged flies in the studied areas. Regarding the total species number, Primorsky Kray and Republic of Sakha in Russia, Henan and Shaanxi in China, as well as Mongolia are the top five regions, each with more than 100 species known. Cluster analysis of the dolichopodid genera composition allows us to divide all studied territories into two groups: Group A is mixed, since it includes both the Russian regions and the Chinese provinces; Group B includes only Russian regions. Generally, the mathematical analysis of the dolichopodid species supports the uniqueness of Primorsky Kray as the biodiversity center in East Asian Palaearctic. A decrease in the number of known species and biodiversity indices is observed northward, southward and westward of Primorsky Kray. One more possible center is located closely to the Oriental provinces of China (Henan and Shaanxi provinces).

Polarization lidar for shallow water depth measurement

2010 ◽  
Vol 49 (36) ◽  
pp. 6995 ◽  
Author(s):  
Steven Mitchell ◽  
Jeffrey P. Thayer ◽  
Matthew Hayman
Keyword(s):  
Shallow Water ◽  
Water Depth ◽  
Depth Measurement ◽  
Shallow Water Depth

scholarly journals A PROSPECTIVE SINGLE-BLINDED STUDY ON THE SAFETY AND EFFICACY OF ZINC SUPPLEMENTATION IN PULMONARY TUBERCULOSIS

2018 ◽  
Vol 11 ◽  
Author(s):  
Yeswanth Prasanna Kumar B ◽  
Praveen D ◽  
Vijey Aanandhi M
Keyword(s):  
Pulmonary Tuberculosis ◽  
Zinc Supplementation ◽  
Serum Zinc ◽  
Sputum Smear ◽  
Safety And Efficacy ◽  
Medication Treatment ◽  
Blinded Study ◽  
Group A ◽  
Group B ◽  
The Given

Aim and Objectives: The aim of the study was to study the serum zinc (Zn) levels, safety, and efficacy of Zn supplementation in pulmonary tuberculosis (PTB) patients.Methods: A randomized single-blinded study of two groups: Group A received conventional TB therapy while Group B received conventional TB therapy along with 15 mg of Zn tablet. 40 patients were assigned in each group by randomized permuted blocks.Results: After 8 weeks of treatment in Group A 27 patients and Group B 36 patients were found to be sputum negative with p=0.0421 and 0.0629. After 24 weeks of treatment in Group A 37 patients and Group B 40 patients were found to be sputum negative with p=0.00976 and 0.00971. By this, the given treatment was effective in the patients with PTB.Conclusion: Zn supplementation improves the effect of TB medication treatment and results in earlier sputum smear conversion.

scholarly journals Morphological characteristics of local populations of European vendace Coregonus albula (L.) in some lakes of Latvia during 50 years

2009 ◽  
Vol 63 (6) ◽  
pp. 271-278 ◽  
Author(s):  
Jeļena Oreha ◽  
Nataļja Škute
Keyword(s):  
Cluster Analysis ◽  
Statistical Analysis ◽  
Morphological Characteristics ◽  
Specific Form ◽  
Living Conditions ◽  
Local Conditions ◽  
Coregonus Albula ◽  
Local Populations ◽  
History Of

Morphological characteristics of local populations of European vendace Coregonus albula (L.) in some lakes of Latvia during 50 years The vendace (Coregonus albula (L.)) is a widespread fish in the waters of the Holarctic and has been much studied in regard to history of spread and evolution. Statistical analysis of morphometric and meristic changes in Coregonus albula in some Latvian lakes for the last 50 years was conducted. Cluster analysis of meristic parameters showed that the vendace populations of lakes Stirnu - Alūksnes have become closer in meristic properties while the vendace populations of lakes Drīdzis - Sventes have become more dissimilar. The diversity and variation of morphological characteristics of vendace in the studied lakes are within the range of variations of the European vendace (Coregonus albula), although due to its flexibility it makes a lake-specific form depending on the local conditions of each reservoir. The discovered differences in the vendace populations from Lakes Nirzas, Rāznas, Stirnu, Alūksnes, Drīdzis, and Sventes seem to have resulted solely from/due to the adaptation of vendace to living conditions, which has changed during the previous 50 years.

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