scholarly journals Analysis of biological spectrum of Divcibare flora

2006 ◽  
pp. 143-154
Author(s):  
Ivana Popovic ◽  
Dragica Obratov-Petkovic
Keyword(s):  
Environmental Effects ◽  
Life Form ◽  
Balkan Peninsula ◽  
Study Region ◽  
Floristic Study ◽  
Study Results ◽  
Species Evolution ◽  
Basic Characteristics ◽  
Biological Spectrum

One of the essential analyses which is performed during the floristic study of a region is the analysis of the biological spectrum. The analysis of the biological spectrum of the flora includes the determination of the type of life form for each taxon described in the flora of the study region. If it is considered that life form is a specific structural-functional response to the environmental effects and the result of the adaptation during the species evolution, it is clear that the basic characteristics of the site are more or less reflected in any life form. This fact is confirmed by the analysis of the biological spectrum of Divcibare flora. The study results are in correlation with the results of the analysis of the biological spectrum of the flora of Serbia and the Balkan Peninsula.

scholarly journals Analysis of the biological spectrum of vascular flora of Ravni Srem flood forests

2011 ◽  
pp. 57-70
Author(s):  
Branislav Jurisic ◽  
Dragica Obratov-Petkovic ◽  
Ivana Bjedov ◽  
Nenad Bojat ◽  
Vladimir Stevanovic
Keyword(s):  
Functional Response ◽  
Environmental Effects ◽  
Life Form ◽  
Study Region ◽  
Vascular Flora ◽  
Floristic Study ◽  
Species Evolution ◽  
Basic Characteristics ◽  
Biological Spectrum

One of the essential analyses performed during the floristic study of a region is the analysis of the biological spectrum. The analysis of the biological spectrum of the flora includes the determination of the type of life form for each taxon described in the flora of the study region. If it is considered that life form is a specific structural-functional response to the environmental effects and the result of the adaptation during the species evolution, it is clear that the basic characteristics of the site are more or less reflected in any life form. This fact is confirmed by the analysis of the biological spectrum of the flora of Ravni Srem. The analysis of the Ravni Srem flora shows the domination of the hemicryptophytes and the subdomination of the phanerophytes with a considerable participation of the therophytes.

Faunistic inventory and zoogeographical analysis of the ground beetles (Coleoptera, Carabidae) of Garf Raydah Nature Reserve, Southwestern of Saudi Arabia, and description of a new species of Paussinae

Zootaxa ◽  
2018 ◽  
Vol 4514 (3) ◽  
pp. 341 ◽  
Author(s):  
MAHMOUD S. ABDEL-DAYEM ◽  
IFTEKHAR RASOOL ◽  
ALI A. ELGHARBAWY ◽  
PETER NAGEL ◽  
HATHAL M. ALDHAFER
Keyword(s):  
Saudi Arabia ◽  
Life Form ◽  
Nature Reserve ◽  
Arabian Peninsula ◽  
New Records ◽  
Ground Beetles ◽  
Kingdom Of Saudi Arabia ◽  
Form Analysis ◽  
A New Species

Study of ground beetles of the Garf Raydah Nature Reserve, located in the Asir Mountains of southwestern Kingdom of Saudi Arabia (KSA) resulted in one species, Paussus abditus Nagel, sp. n. described as new to science. Thirteen species (21.3%) are reported as new country records and fifteen species (24.6%) are new records for Asir Province. Adult beetles were collected from 2013 to 2017. The determination of this material yielded a total of 61 species in 40 genera and 17 tribes belonging to nine subfamilies of Carabidae. The species richness represented approximately 36.1% of carabid species previously reported from KSA. The most species rich tribes were the Lebiini (20 species), the Harpalini (10 species), and the Bembidiini (6 species). The life form analysis of adults indicated 18 life form types that are grouped into three categories, Zoophagous (77.1%), Mixophytophagous (18.0%), and Myrmecophilous (4.9%). Zoogeographical analyses indicated that the Afrotropical (19.3%) and the Saharo-Arabian (19.3%) species dominate the carabid fauna of this region of KSA. Coryza cf. maculata (Nietner, 1856) is considered the only Oriental representative. Only one cosmopolitan species, Perigona nigriceps (Dejean, 1831), was collected. Eleven endemics were identified; six species are considered KSA endemics and five are Arabian Peninsula endemics. 

Contribution of satellite altimetry in modelling Moho density contrast in oceanic areas

2019 ◽  
Vol 13 (1) ◽  
pp. 33-40 ◽  
Author(s):  
M. Abrehdary ◽  
L. E. Sjöberg ◽  
D. Sampietro
Keyword(s):  
Satellite Altimetry ◽  
Density Contrast ◽  
Contrast Model ◽  
Bathymetric Data ◽  
Crustal Model ◽  
Marine Gravity ◽  
Study Results ◽  
Vening Meinesz ◽  
Satellite Altimetry Data

Abstract The determination of the oceanic Moho (or crust-mantle) density contrast derived from seismic acquisitions suffers from severe lack of data in large parts of the oceans, where have not yet been sufficiently covered by such data. In order to overcome this limitation, gravitational field models obtained by means of satellite altimetry missions can be proficiently exploited, as they provide global uniform information with a sufficient accuracy and resolution for such a task. In this article, we estimate a new Moho density contrast model named MDC2018, using the marine gravity field from satellite altimetry in combination with a seismic-based crustal model and Earth’s topographic/bathymetric data. The solution is based on the theory leading to Vening Meinesz-Moritz’s isostatic model. The study results in a high-accuracy Moho density contrast model with a resolution of 1° × 1° in oceanic areas. The numerical investigations show that the estimated density contrast ranges from 14.2 to 599.7 kg/m3 with a global average of 293 kg/m3. In order to evaluate the accuracy of the MDC2018 model, the result was compared with some published global models, revealing that our altimetric model is able to image rather reliable information in most of the oceanic areas. However, the differences between this model and the published results are most notable along the coastal and polar zones, which are most likely due to that the quality and coverage of the satellite altimetry data are worsened in these regions.

scholarly journals A New Method for Determination of Joint Roughness Coefficient of Rock Joints

2015 ◽  
Vol 2015 ◽  
pp. 1-6 ◽  
Author(s):  
Shigui Du ◽  
Huicai Gao ◽  
Yunjin Hu ◽  
Man Huang ◽  
Hua Zhao
Keyword(s):  
Scale Effect ◽  
Fractal Model ◽  
Rock Joints ◽  
Effective Length ◽  
Roughness Coefficient ◽  
Joint Roughness Coefficient ◽  
Joint Roughness ◽  
Exposed Rock ◽  
Study Results

The joint roughness coefficient (JRC) of rock joints has the characteristic of scale effect. JRC measured on small-size exposed rock joints should be evaluated by JRC scale effect in order to obtain the JRC of actual-scale rock joints, since field rock joints are hardly fully exposed or well saved. Based on the validity analysis of JRC scale effect, concepts of rate of JRC scale effect and effective length of JRC scale effect were proposed. Then, a graphic method for determination of the effective length of JRC scale effect was established. Study results show that the JRC of actual-scale rock joints can be obtained through a fractal model of JRC scale effect according to the statistically measured results of the JRC of small-size partial exposed rock joints and by the selection of fractal dimension of JRC scale effect and the determination of effective length of JRC scale effect.

scholarly journals Structuring Youth Councils in Saudi Arabia: A Forecast Study

2021 ◽  
Vol 10 (1) ◽  
pp. 96
Author(s):  
Mohammed Abdurahman Alkohaiz ◽  
Haifa Abdulrahman Bin Shalhoub
Keyword(s):  
Saudi Arabia ◽  
Community Development ◽  
Vice President ◽  
Youth Participation ◽  
Optimal Structure ◽  
Primary Study ◽  
Improve Performance ◽  
King Saud University ◽  
Study Results

Youth is one of the most substantial pillars of community development. The study investigates the optimal structure of youth councils in Saudi Arabia. And it establishes the necessary regulations by setting targets, tasks, conditions of membership, and developing a unified proposal for these councils. The primary study tool was a questionnaire developed by researchers were used to assess the studied parameters. They were distributed to (413) young men at King Saud University in Riyadh, Saudi Arabia, aged (18-34) years. According to the analytical approach, it is a forecast study. The study results showed that the optimal structure of these councils' includes: First, the prince of the region or the governor as a president. Second, the rector as a vice-president. Finally, the commission is equally male and female. While the council objectives: First, take advantage of youth proposals, capacities, and intellectual property. Secondly, youth participation in the discussion, determination of their requirements, and decision-making. Also, it identified a set of tasks: Encouraging creative and talented youth to achieve national accomplishment and motivating them to take on their responsibilities in serving their community. As for the terms of the Council's membership, members must be between 18 and 30 years, and the name of the office shall be two years and nominated by government educational bodies.There should be a responsible body for structuring youth councils regions, increasing youth councils, and meetings between them in a periodic manner among different countries to exchange experiences and improve performance.   Received: 27 October 2020 / Accepted: 10 December 2020 / Published: 17 January 2021

scholarly journals АВТОМАТИЗАЦІЯ ПРОЦЕСУ СТВОРЕННЯ ЕСКІЗІВ НОВИХ МОДЕЛЕЙ ОДЯГУ В УМОВАХ МАЛИХ ПІДПРИЄМСТВ

2018 ◽  
Vol 118 (1) ◽  
pp. 16-23
Author(s):  
Д. В. Васильковський ◽  
Н. А. Цимбал
Keyword(s):  
Estimation Method ◽  
Automated Design ◽  
Women's Clothing ◽  
Expert Estimation ◽  
Graphic Editor ◽  
Study Results ◽  
Different Types ◽  
Female Figures ◽  
Clothing Manufacture

Improvement process of designing new models of women's clothing by automating sketch design in conditions of small sewing enterprises. Analysis of computer graphics programs possibilities; determination of meaningful indicators for determining the suitability of existing software by expert estimation method; approbation of the study results in the conditions of designer workplace. There have been created templates of graphic images of different types of female figures, libraries of modern materials textures, which are most often used for women's clothing manufacture. There has been developed the method of new model sketches creation of women's clothes with the use of figure templates and libraries of materials. An approach is proposed that generalizes and simplifies the process of adaptation of universal computer programs of vector graphics with the needs of automated design of new clothing models There has been developed a methodical support for the use of the universal graphic editor Xara Designer Pro on the AWS of a designer of a small sewing enterprise.

scholarly journals Flood Risk Assessment and Quantification at the Community and Property Level in the State of Iowa

2021 ◽  
Author(s):  
Enes Yildirim ◽  
Ibrahim Demir
Keyword(s):  
Risk Assessment ◽  
High Resolution ◽  
Flood Risk ◽  
Large Scale ◽  
Spatial Scales ◽  
The United States ◽  
Flood Risk Assessment ◽  
Study Region ◽  
Study Results ◽  
Flood Maps

Flood risk assessment contributes to identifying at-risk communities and supports mitigation decisions to maximize benefits from the investments. Large-scale risk assessments generate invaluable inputs for prioritizing regions for the distribution of limited resources. High-resolution flood maps and accurate parcel information are critical for flood risk analysis to generate reliable outcomes for planning, preparedness, and decision-making applications. Large-scale damage assessment studies in the United States often utilize the National Structure Inventory (NSI) or HAZUS default dataset, which results in inaccurate risk estimates due to the low geospatial accuracy of these datasets. On the other hand, some studies utilize higher resolution datasets, however they are limited to focus on small scales, for example, a city or a Hydrological United Code (HUC)-12 watershed. In this study, we collected extensive detailed flood maps and parcel datasets for many communities in Iowa to carry out a large-scale flood risk assessment. High-resolution flood maps and the most recent parcel information are collected to ensure the accuracy of risk products. The results indicate that the Eastern Iowa communities are prone to a higher risk of direct flood losses. Our model estimates nearly $10 million in average annualized losses, particularly in large communities in the study region. The study highlights that existing risk products based on FEMA's flood risk output underestimate the flood loss, specifically in highly populated urban communities such as Bettendorf, Cedar Falls, Davenport, Dubuque, and Waterloo. Additionally, we propose a flood risk score methodology for two spatial scales (e.g., HUC-12 watershed, property) to prioritize regions and properties for mitigation purposes. Lastly, the watershed-scale study results are shared through a web-based platform to inform the decision-makers and the public.

scholarly journals Imaging Mueller matrix determination of transparent, unpolarizing samples using a classically entangled polarization state

2018 ◽  
Vol 64 (4) ◽  
pp. 407
Author(s):  
Jacqueline Isamar Muro-Ríos ◽  
R. Espinosa-Luna
Keyword(s):  
Open Space ◽  
Polarization State ◽  
Theoretical Work ◽  
Mueller Matrix ◽  
Experimental Setup ◽  
Wave Plate ◽  
Recent Theoretical Work ◽  
Study Results ◽  
Theoretical Proposal

Inspired in a recent theoretical work for the determination of the Mueller matrix, using as incidence a single classically entangled polarization state (F. Töppel et al., New J. Phys. 16 (2014) 073019), an experimental setup is proposed and tested.  The open space and two wave plate retarders are used as the transparent, nondepolarizing samples under study. Results show some experimental improvements are necessary in order to implement accurately the theoretical proposal in which this work is based.

scholarly journals Effect of variable content of organic matter and carbonates on results of determination of granulometric composition by means of Casagrande’s areometric method in modification by Prószyński

2018 ◽  
Vol 69 (1) ◽  
pp. 39-48 ◽  
Author(s):  
Hubert Warzyński ◽  
Agnieszka Sosnowska ◽  
Andrzej Harasimiuk
Keyword(s):  
Organic Matter ◽  
Calcium Carbonate ◽  
Granulometric Composition ◽  
Considerable Effect ◽  
Study Results ◽  
Variable Content ◽  
Practical Conclusion

Abstract The paper discusses the issue of the admixtures’ effect on results of granulometric composition determinations by Casagrande’s areometric method in modification by Prószyński. An experiment was conducted involving preparation of samples with known granulometric composition and determination of their composition by means of the aerometric method. Three types of samples were prepared: base (control), containing organic matter, and containing carbonates. Results of the determinations showed a considerable effect of the admixture of organic matter and calcium carbonate on the accordance of determinations, depending on their percent content. The study results also confirmed known dependencies of disturbances in proportions between the sandy and silty-clayey fraction. A practical conclusion from the research is the determination of the threshold of the organic matter and carbonates percent content at which the determination should be absolutely preceded by processes of mineralisation and decalcification.

Sign in / Sign up

Export Citation Format

Share Document