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Search Results: 1 - 10 of 18499 matches for " U. Stodolny "
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Damage estimation of subterranean building constructions due to groundwater inundation – the GIS-based model approach GRUWAD
R. Schinke,M. Neubert,J. Hennersdorf,U. Stodolny
Natural Hazards and Earth System Sciences (NHESS) & Discussions (NHESSD) , 2012, DOI: 10.5194/nhess-12-2865-2012
Abstract: The analysis and management of flood risk commonly focuses on surface water floods, because these types are often associated with high economic losses due to damage to buildings and settlements. The rising groundwater as a secondary effect of these floods induces additional damage, particularly in the basements of buildings. Mostly, these losses remain underestimated, because they are difficult to assess, especially for the entire building stock of flood-prone urban areas. For this purpose an appropriate methodology has been developed and lead to a groundwater damage simulation model named GRUWAD. The overall methodology combines various engineering and geoinformatic methods to calculate major damage processes by high groundwater levels. It considers a classification of buildings by building types, synthetic depth-damage functions for groundwater inundation as well as the results of a groundwater-flow model. The modular structure of this procedure can be adapted in the level of detail. Hence, the model allows damage calculations from the local to the regional scale. Among others it can be used to prepare risk maps, for ex-ante analysis of future risks, and to simulate the effects of mitigation measures. Therefore, the model is a multifarious tool for determining urban resilience with respect to high groundwater levels.
Use of Kostiakov’s Infiltration Model on Michael Okpara University of Agriculture, Umudike Soils, Southeastern, Nigeria  [PDF]
Magnus U. Igboekwe, Ruth U. Adindu
Journal of Water Resource and Protection (JWARP) , 2014, DOI: 10.4236/jwarp.2014.610083
Abstract:

The main purpose of this study is to obtain the water infiltration parameters of the soils of Michael Okpara University of Agriculture, Umudike. This could be used in simulating infiltration for these soils when designing irrigation projects, thereby saving time and cost of field measurement. Field measurements of infiltration were first made using a double ring infiltrometer. The test lasted for 180 mins in each location. Infiltration values ranged from 0.03 cm/min to 0.1 cm/min. The highest value was obtained in the Forest Block. Kostiakov’s infiltration model was then applied on the field data in order to determine the soils’ infiltration parameters and equations. The model empirical constants or parameters obtained were “m” and “n”. For “m” the values were: 0.53 for the soil of Forest Block, 0.42 for Poultry block, 0.50 for P.G. block, 0.41 for the soils of Staff School and Guest House. The corresponding “n” values were: 1.37, 1.12, 0.37, 1.79, and 1.38. Infiltration equations: 0.4It1.38, 0.4lt1.79, 0.42t1.12, and 0.53t1.37 were determined for the locations. These were used to simulate data which were evaluated by comparing them with the field data. The two data sets showed closed relationships. This implied that the model could be used to simulate water infiltration during irrigation projects in the farms of Michael Okpara University of Agriculture, Umudike.

Effects of Kolaviron, the Major Constituent of Garcinia kola, on the Histology of the Hypothalamus, Pituitary, and Testes Using Adult Male Wistar Rats as a Model Organism  [PDF]
A. U. Obi, P. U. Nwoha
Forensic Medicine and Anatomy Research (FMAR) , 2014, DOI: 10.4236/fmar.2014.23014
Abstract: This study determined the effects of kolaviron on the histology of organs of the hypothalamic-pi- tuitary-gonadal axis, mainly the hypothalamus, pituitary and testis. The aim was to ascertain if its consumption has deleterious effects on these organs. Thirty six adult Wistar rats divided into six groups of six animals each were used and kolaviron administered at 100, 200, 400 and 800 mg/kg body weight. The results showed that gross cellular depletion and desquamation of cells of testis significantly reduced number of cells in the hypothalamus and pituitary (P < 0.05). It significantly reduced the relative brain weight (P < 0.05). These findings suggest that kolaviron can alter the histology of the axis which may impair its reproductive function.
A Multi-Objective Obnoxious Facility Location Modelon a Plane  [PDF]
U. K. Bhattacharya
American Journal of Operations Research (AJOR) , 2011, DOI: 10.4236/ajor.2011.12006
Abstract: In this paper a Vertex Covering Obnoxious Facility Location model on a Plane has been designed with a combination of three interacting criteria as follows: 1) Minimize the overall importance of the various exist-ing facility points; 2) Maximize the minimum distance from the facility to be located to the existing facility points; 3) Maximize the number of existing facility points covered. Area restriction concept has been incor-porated so that the facility to be located should be within certain restricted area. The model developed here is a class of maximal covering problem, that is covering maximum number of points where the facility is within the upper bounds of the corresponding mth feasible region Two types of compromise solution methods have been designed to get a satisfactory solution of the multi-objective problem. A transformed non- linear programming algorithm has been designed for the proposed non-linear model. Rectilinear dis-tance norm has been considered as the distance measure as it is more appropriate to various realistic situa-tions. A numerical example has been presented to illustrate the solution algorithm.
Role of HLA-A, HLA- B, HLA-DRB1 and HLADQB1 Alleles in HIV-1 Patients with Pulmonary Tuberculosis Co-Infection from Western India  [PDF]
U. Shankarkumar, A. Shankarkumar
World Journal of AIDS (WJA) , 2011, DOI: 10.4236/wja.2011.14019
Abstract: We attempted to study the role of HLA HLA-A, B, DRB1 and DQB1 in HIV-1 patient’s co infected with pulmonary tuberculosis (PTB). A total of 102 HIV-1 + patients co-infected with pulmonary tuberculosis and 200 healthy controls were included in HLA analysis. HLA-A*, HLA-B* HLA-DRB1* and DQB1* typing was done molecularly by PCR- SSOP (Polymerase Chain reaction-Sequence Specific Oligonucleotide Probing) method using kit (Dynal Kit – Invitrogen). The frequencies of the HLA-A, B HLA-DRB,1 and DQB1 alleles were determined using standard software. The HLA alleles identified among HIV + ve/PTB + ve co-infected patients as compared with healthy controls showed a significantly increased frequency of HLA-B*08:01:01 in HIV + ve/PTB + ve co-infected patients when compared with healthy controls (p = 0.011, OR 3.335, 95% CI 1.35-8.18), Likewise HLA-DQB1*03:01:03 was significantly increased in HIV + ve/PTB + ve co-infected patients as against healthy controls (p < 0.0001, OR 107.5, 95% CI 6.195 - 1865.3). Similarly HLA-DQB*06:01:02 allele frequency was observed in HIV + ve/PTB + ve co-infected patients as against healthy controls (p = 0.003, OR 4.808, 95% CI 1.72-13.39), HLA-DQB1*03:01:01 (p = 0.045, OR 0.219, 95% CI 0.051 - 0.940), HLA-DQB1*06:01:01:01 (p = 0.012, OR 0.334, 95% CI 0.145 - 0.770), alleles in HIV + ve/PTB + ve co-infected patients when compared with healthy controls. We can be concluded that different HLA alleles may render susceptibility or protection to in different ethnic population.
Unsteady Incompressible Flow of a Generalised Oldroyed-B Fluid between Two Infinite Parallel Plates  [PDF]
D. Bose, U. Basu
World Journal of Mechanics (WJM) , 2013, DOI: 10.4236/wjm.2013.32012
Abstract:

This paper presents a study of visco-elastic flow of an incompressible generalized Oldroyd-B fluid between two infinite parallel plates in which the constitutive equation involves fractional order time derivative. The solutions of field equations are being obtained for the motion of the said fluid between two parallel plates where the lower plate starts to move with steady velocity and the upper plate remains fixed in the first problem and the upper plate oscillates with constant frequency and the other being at rest in the second problem. The exact solutions for the velocity field are obtained by using the Laplace transform and finite Fourier Sine transform technique in terms of Mittag Leffler and generalised functions. The analytical expression for the velocity fields are derived and the effect of fractional parameters upon the velocity field is depicted graphically.

The Density of Energy States for Nonparabolic Dispersion Law in a Strong Magnetic Field  [PDF]
U. I. Erkaboev
Journal of Applied Mathematics and Physics (JAMP) , 2016, DOI: 10.4236/jamp.2016.411208
Abstract:
For nonparabolic dispersion law is determined by the density of the energy states (Ns) in a quantizing magnetic field. The effect of temperature on the expansion of the Lan-dau levels of electrons semiconductors with the nonquadratic dispersion is studied. The density of states at low temperatures is calculated from data on high-tem- perature Ns.
GIS Based Analysis of Shoreline Change in Ibeno, Akwa Ibom State, Nigeria  [PDF]
F. U. Ekong
Journal of Environmental Protection (JEP) , 2017, DOI: 10.4236/jep.2017.85041
Abstract: The study is an attempt to detect shoreline and land use change with a view to determining the trend and nature of the change in Ibeno, Akwa Ibom State, Nigeria. Landsat and Ikonos imageries and GIS techniques were utilized in capturing these changes over a period of 22 years (1986 to 2008) using 3 time periods. The result of the analysis indicated that there were more eroding than accretion portion in the shoreline of the study area. The study recommended monitoring of the shoreline change from time to time, establishment and enforcement of development setbacks, implementation of development control measures as well as the introduction of integrated coastal zone planning and management within the Niger Delta region to reduce hazards and protect the beautiful sand beaches.
Applications of Fractional Calculus to Newtonian Mechanics  [PDF]
Gabriele U. Varieschi
Journal of Applied Mathematics and Physics (JAMP) , 2018, DOI: 10.4236/jamp.2018.66105
Abstract: We investigate some basic applications of Fractional Calculus (FC) to Newtonian mechanics. After a brief review of FC, we consider a possible generalization of Newton’s second law of motion and apply it to the case of a body subject to a constant force. In our second application of FC to Newtonian gravity, we consider a generalized fractional gravitational potential and derive the related circular orbital velocities. This analysis might be used as a tool to model galactic rotation curves, in view of the dark matter problem. Both applications have a pedagogical value in connecting fractional calculus to standard mechanics and can be used as a starting point for a more advanced treatment of fractional mechanics.
Skilling Requirements in Textiles: Technical Training and Its Trainers-Sri Lanka in Perspective  [PDF]
Rohana U. Kuruppu
Journal of Textile Science and Technology (JTST) , 2018, DOI: 10.4236/jtst.2018.44007
Abstract: The textile and clothing industry has become very competitive in the world over. There are many players in the industry. The most prominent player is China. Recent statistics reveal that China continue to be the world’s largest textile and clothing producer in 2016 (Textiles outlook, 2017). China’s major export markets are EU, USA and Japan. However, rising labour costs and production costs of China will shift production to lower cost suppliers. This will give South Asia and South-East Asia an opportunity to capitalize in their exports. The question is, can these regions in Asia take this challenge? To overcome the challenges, they must be ready with highly skilled manpower. The Tertiary and Vocational Educational Training system across Asian region must be geared to take this challenge of training the new recruits. Can these countries have adequate numbers of skilled, effective and experienced trainers to train the new recruits? Qualified trainers may be in short supply. Then, how quickly can these trainers be made available for training? Half-baked trainers would turn half-baked workers that will not give right condition to meet the future challenges. A recent study by the author has revealed that there are not enough qualified trainers to impart knowledge and skill for those in the textile and clothing industry in Sri Lanka. This can be the case across Asia. It is time that responsible professionals in the training industry should consider about trainers if they are to launch a massive skilling project to meet requirements of the textile/clothing industry. Skilling the trainers must be a priority. It will be interesting to note that there is a mismatch between trainees and training courses. Also, students are not attracted to training courses. So, there is a concern about who should be trained and are they available?
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