• 
• 
• 
• Browse by Subjects
• Publications A-Z index

1.

A Finite Element Approach of Stability Analysis of Internal Dump Slope in Wardha Valley Coal Field, India, Maharashtra Dhananjai Verma, Ashutosh KAI nthola, S S Gupte, T N Singh American Journal of Mining and Metallurgy. 2013 1 (1). doi: 10.12691/ajmm-1-1-1 Keywords: internal dump, slope stability, numerical modeling, Coal Field Context: Designing of a stable overburden disposal slope is vital in large opencast coal mines. Spoil generated during extraction of coal which is dumped externally requires larger land to remain stable and also poses problems to surrounding environment due to limited land availability. This has lead to the preference of internal dumping in which the waste is dumped in de-coaled region which is beneficial during extraction and reclamation of mine. Internal dumping is also the most economical and environment friendly method of waste disposal and is being adopted everywhere. It has certain limitations and inherent dangers of failures posing operational and safety threats. In this paper, a numerical study for stability of 80 m high internal dump slopes from an opencast coal mine of Wardha Valley Coal Field, Maharashtra, India has been carried out using Finite Element Method (FEM). Different scenarios as per the dump heights have been accounted and simulated using Plaxis2D-8 to understand the failure mechanism and the changes in factor of safety with variation in bench height and the number of benches. Abstract Full Text (PDF) [Epub] Full Text (HTML)

2.

Probabilistic and Sensitivity Investigation for the Hill Slopes in Uttarakhand, Lesser Himalaya, India Ashutosh KAI nthola, Dhananjai verma, T N Singh American Journal of Numerical Analysis. 2013 1 (1). doi: 10.12691/ajna-1-1-2 Keywords: Himalayan, Rock Mechanics, slope stability, numerical simulation, sensitivity analysis Context: Himalayas is one of most seismically active mountain chain in the world. Landsides and the mass wasting are a prevalent phenomenon in this region. There are a considerable number of human populations living in the hilly regions which are under a constant threat of hill slope collapse. The stability assessment of these hills is one of the vital steps to mitigate the danger to this natural calamity. The deterministic factor of safety calculations have been traditionally used for the hazard evaluation of the hill slopes. For the present study, two hill slopes, Chandaak and Chhera, have been selected for probabilistic and sensitivity analysis. These areas were analyzed using limit equilibrium method for calculation of factor of safety and probability of failure. The factors of safety were calculated using Bishop's method of slice. The analysis was done for both dry and saturated conditions. At the same time the sensitivity of each parameter on the factor of safety was analyzed. The probability analysis of these areas was done using Monte-Carlo simulation which uses randomly selected discrete values of each variable from their probability distribution. In both the hill slopes the rock mass has varied weathering grade, ranging from highly weathered to moderately weathered. Seasonal variation in the rock mass strength was accounted for in the study. Chhera hill were quantified to have high FOS in both cases (dry and saturated) as compared to the Chahdaak hill, making than more vulnerable. Abstract Full Text (PDF) [Epub] Full Text (HTML)

3.

Comparison of Quality and Nutritional Components of Eggs from Blue Peafowl and Hen Yang Fu-min, Xu Xiao-xia, Yang Min, Qiang KAI -xia, Wang Xue-yan Journal of Food and Nutrition Research. 2014 2 (4). doi: 10.12691/jfnr-2-4-2 Keywords: blue peafowl egg, hen egg, composition, nutritional quality Context: The study was undertaken to compare the quality and nutritional components of eggs from blue peafowl and Jingbai hen. The results showed that the average egg weight, eggshell thickness and egg yolk relative weight of blue peafowl eggs were significantly bigger than those of hen eggs (p < 0.01). Blue peafowl eggs contained significantly higher protein (p < 0.01), higher carbohydrate (p < 0.01), total amino acid and essential amino acid (p < 0.01), Zn (p < 0.01), Ca (p < 0.05) but lower fat (p < 0.01) and water (p < 0.05) than those in hen eggs. Amino acid content of blue peafowl eggs was in accordance with the ideals of the FAO mode. Blue peafowl eggs contained significantly higher VC and VB2 (p < 0.01) but lower VA and VE (p < 0.01) than hen eggs. 47 volatile compounds were found in raw blue peafowl eggs while only 30 in raw hen eggs; 60 volatile compounds were found in cooked blue peafowl eggs while only 41 in cooked hen eggs. Overall, most indices of qualities and nutrient components of blue peafowl eggs were not inferior to hen eggs. Abstract Full Text (PDF) [Epub] Full Text (HTML)

4.

Necessity of Having Propaedeutic Courses of Computer Science in Preschool and Primary Education in the Republic of Kazakhstan Yessen Iklasovich Bidaibekov, Lyazzat Baltabaevna Rakhimzhanova, Darazha Nagashbaevna Issabayeva, Shyryn Shirinkyz Tileubergenovna, Issabayeva Sulu Nagashbaevna, Ainagul KAI pbayeva American Journal of Educational Research. 2014 2 (7). doi: 10.12691/education-2-7-6 Keywords: prepaedeutic course of computer science, computer science in preschool age, computer science in primary school Context: In the article elements of informatization of preschool and primary education at schools of the Republic of Kazakhstan, considering development of system of technical, program, methodical means, providing an introduction of computer science and computing in practice of training and educational process of propaedeutic course of computer science with wide usage of computerized intersubject connections in all school subjects in native Kazakh language are considered. On the one hand, the results will be rely on solution of problems of preschool education system in senior and preparatory groups of preschool institutions of the RK - kindergartens; on the other hand, - on organic interface of propaedeutic school course with basic course of computer science, including program and methodical systems in 5-th-9-th grades and with preprofessional school course of computer science. Besides, perspectives of usage of electronic educational resources in management of all three training levels - propaedeutic, basic and preprofessional will be taken into consideration. Abstract Full Text (PDF) [Epub] Full Text (HTML)

5.

The Effect of the Petroleum Ether Extracts from Mangosteen Pericarp (Garcinia mangostana L.) on Interferon-gammaand, Interleukin-12 Activities in AlbinoWistar Rats (Rattus norvegicus) Infected with Mycobacterium tuberculosis Martha KAI hena, Syamsu, Yadi Yasir, Mochammad Hatta American Journal of Microbiological Research. 2015 3 (1). doi: 10.12691/ajmr-3-1-2 Keywords: extract, Garcinia mangostanal., IFN- γ, IL-12, Mycobacterium tuberculosis Context: Background. Garcinia mangostana L(GML) pericarp extract is known to contain active substances called Xanthones (α, β and γ Mangosteens) which is the biggest derivative and has strong antioxidant effects. This substance also has antiinflammatory, antilipid, anticancer, antibacteria and antituberculosis effects. However, its mechanism is still unclear. Mycobacterium tuberculosis (M. tuberculosis) invasion into the lungs through the respiratory tract can cause severe infection. The body has an immune system which controls infection by eliminating germs to ease the burden of infection. Interferon gamma (IFN- γ) and Interleukin 12 (IL-12) acts as positive feedback in stimulating macrophages to kill M. tuberculosis. During this process, oxidative compounds (ROI,RNI,NO) that plays an important role in the phagolysosome fusion process are produced. Not only does the consumption of GML pericarp extract as an antioxidant becomes the immunomodulator to enhance the immune’s activities, it also functions as an antioxidant that can neutralize the oxidative compounds produced by the immune system. The aim of this study was to determine the effect of EPEBh GML on IFN-γ and IL-12 secretion activities in mice infected with M. tuberculosis. Materials and method. This study used 30 Wistar rats, 150-200g of weight and 8-10 weeks old. Rats were randomly divided into 6 groups each consisting of 5 rats, including the negative control (without infection and without EPEKBh GML intervention) and a positive control (rats were infected with M.tb H37Rv at a dose of 106cfuas much as 0.2 ml through the trachea for 6 weeks). Once infected, the rats were then intervened with EPEKBhGML 30, 60, 120 dose and 180 mg/kg bodyweigh/day for 1 month. Afterward the rats were necropsied and dissected for the blood to be taken directly from the heart. Levels of IFN-γ and IL-12 were analyzed using the ELISA method. Data were then analyzed using One-Way ANOVAtest followed by Post-Hoc test (LSD), a significant P <0.05, to assess the comparison between groups. Results. Results show that EPEKBh GML significantly affect the rise of IFN-γ levels, with a P value 0,000<0,05 and IL-12, with a P value of 0,045 <0,05. Conclusion. EPEKBh GML was effective in increasing the activity of IFN-γ and IL-12 and the most effective dose to increase IFN-γ and IL-12activity was 120 mg/kgbody weight/day. Also, increasing the dose to a higher dosage had no effect on IFN-γ and IL-12 activity, in fact it tended to decline.This results need to further study to understand what the reason. Abstract Full Text (PDF) [Epub] Full Text (HTML)

6.

Synthesis, Characterization and Antifungal Activity of Some Metal Complexes Derived From Quinoxaloylhydrazone Ahmed Mahal, Rajab Abu-El-Halawa, Sami A. Zabin, Mohammad Ibrahim, Mahmoud Al-Refai, Tawfeq KAI mari World Journal of Organic Chemistry. 2015 3 (1). doi: 10.12691/wjoc-3-1-1 Keywords: aroyl hydrazone, quinoxaline-4-oxide, schiff bases, metal complexes, antifungal activity Context: New Complexes of Mn(II), Co(II), Ni(II), Cu(II), Zn(II), Cd(II), Hg(II) and Tin(II) with 3-methyl-2-(pyridine-2-yl-methylene-hydrazinocarbonyl)quinoxaline-4-oxide (LHP) and 2-(2-hydroxy benzylidene-hydrazinocarbonyl)-3-methylquinoxaline-4-oxide (LHS) were prepared. The new complexes were characterized by elemental analysis, conductivity, magnetic measurements, IR and UV-Vis spectroscopic measurements. The results indicate 1:1 [M:L] chelates with the general formula [M(LHP)Cl2].nH2O where: M = Mn(II), n=4, Co(II), n=1/2, Cu(II), n=1, Hg(II), n=1, and 1:2 [M:L] in case of [M(LHS)2](OAc)2.nH2O when M = Zn(II), n= 3, Cd(II), n= 1, Hg(II), n= 1/2. The tin complex structure is suggested to be [Sn(LHP)2]Cl2.2H2O, while copper produces [Cu2(LHS)2SO4].H2O complexes. Also, the formula for mercuric complex found to be [Hg(LHS)2Cl2].2H2O. The magnetic moment measurements and electronic spectra suggest octahedral geometry for the prepared complexes. The antifungal investigation reveals that the activity was enhanced by chelation. The Cu(II) complexes has the highest inhibition zone against A. niger. But, the antifungal activity was weaker than the standard drug used. Abstract Full Text (PDF) [Epub] Full Text (HTML)

7.

Regulation, Market Structure, Risk and Bank Profitability in the Emerging Countries during the Subprime Crisis BEN MBAREK Hassene, BEN MBAREK KAI s, KHEMIRI Souad Journal of Finance and Economics. 2015 3 (1). doi: 10.12691/jfe-3-1-3 Keywords: banking behavior, efficiency, banking regulation, regulatory and institutional environment Context: The aim of this paper is to study the effect of the regulatory and institutional environment on banking behavior using a panel of conventional banks in 10 emerging countries over the period 2007-2012. To this end, we adopt a simultaneous equations model to capture the dynamic adjustments of banking behavior and efficiency. The results indicate that there is a negative and significant impact of institutional quality on equity and risk. However, we find a positive and significant impact of the institutional environment on banking efficiency indicating the effectiveness of equity regulation insofar as it helped to increase the strength and stability of the international banking system. The imposition of regulatory requirements reduces credit risk and highlights the importance of market discipline as a crucial element in implementing effective regulation and supervision strategies. Abstract Full Text (PDF) [Epub] Full Text (HTML)

8.

Gender Differences in Ocular Biometry among Cataract Patients of Western Nepal Shristi Shrestha, Khem Raj KAI ni, Binamra Basnet American Journal of Public Health Research. 2015 3 (4A). doi: 10.12691/ajphr-3-4A-6 Keywords: Axial Length, Corneal Curvature, Intraocular Lens Power, Cataract, Sex Context: Cataract blindness presents an enormous problem in terms of public health burden, economic loss and social burden. A hospital based retrospective study reviewed the medical data of 520 patients (mean age 68.42±11.77 years) to detect gender based comparison of axial length, corneal curvature and power of intraocular lens that was implanted in patients undergoing cataract surgery in Western Nepal. A significant inter-gender differences was seen in age, axial length, keratometric values and intraocular lens power between the two groups (p<0.05). Females had shorter axial length (22.85±0.86 mm) and steeper corneal curvature (K1: 43.79±1.51 D, K2: 44.46±1.54 D) compared to males (23.04±1.01 mm, K1: 43.51±1.40 D, K2: 44.16±1.40 D). The axial length had a decreasing trend with increasing age in both the sexes. The average power of the intraocular lens was 21.28±1.91 D. In conclusion, the axial length of Nepalese population was comparable to Indian and Pakistani population. However, it was slightly shorter than Whites, Middle-Eastern and some Asian population. The keratometric value ranges from 38.75-50.00 D. Maximum number of patients required intraocular lens of power between 20.00-22.99 D Abstract Full Text (PDF) [Epub] Full Text (HTML)

9.

Stock Returns and Forecast: Case of Tunisia with ARCH Model Ben Mbarek KAI s Journal of Finance and Economics. 2015 3 (3). doi: 10.12691/jfe-3-3-2 Keywords: volatility, ARCH model, Tunisian stock exchange, forecasting Context: The forecasts allow you to predict future values of historical time series data. With the possibilities of forecasting, you can make projections of future values based on the values of the past. Using projections, organizations can prepare for the changes in the economic or competitive conditions by analyzing historical time series data to predict performance and future trends. For example, in a supply chain, if the expected demand match the actual demand, significant efficiencies can be achieved in terms of production, distribution and return. Forecasts use various predictive methods based on mathematical algorithms that model the future demand based on historical time series data that can be obtained from queries and tables containing columns of date or time. The overall objective is to choose a method to generate a time series model best fit values of the past, identifying existing data patterns and projecting the model in the future to generate the forecast. The purpose of this article is to analyze the volatility behavior of the Tunisian stock returns series index TSR in daily frequency over January 1984 to June 2010 period. We will present various non linear models for the behavior of these series through the Arch models. However, these processes are based on the assumption of non autocorrelation endogenous variable in long term. In fact, these models have autocorrelation that decay very quickly when the delay increases. Abstract Full Text (PDF) [Epub] Full Text (HTML)

10.

Ocular Infestation by Leech Jamuna Gurung, Khem Raj KAI ni American Journal of Public Health Research. 2015 3 (5A). doi: 10.12691/ajphr-3-5A-2 Keywords: leech, stream, conjunctiva Context: Background: To share our experiences with a patient of leech infestation. Case description: A 70 years male presented to outpatient department of ophthalmology, Manipal Teaching Hospital with complaints of foreign body sensation, itching and redness of left eye for the past 7 days. He gives history of washing his face in tap water which comes directly from the stream and he had symptoms after this incident. Clinical diagnosis was leech adherent to the bulbar conjunctiva near the limbus at 1 o’clock position. The leech was extracted and there was no obvious signs and symptoms except for mild subconjunctival hemorrhage. Conclusion: Ocular infestation by leech is a rare occurrence. However, this should be considered when patient give history of foreign body sensation, redness and discomfort following swimming or washing face in streams, lakes or ponds. Abstract Full Text (PDF) [Epub] Full Text (HTML)