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Search Results: 1 - 10 of 402096 matches for " M. M. Hossain "
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A Critical Analysis of Empiricism  [PDF]
F. M. Anayet Hossain
Open Journal of Philosophy (OJPP) , 2014, DOI: 10.4236/ojpp.2014.43030
Abstract: Empiricism is a philosophical theory which argues that human knowledge is derived entirely from sensory experience. As a branch of epistemology, empiricism disregards the concept of instinctive ideas and focuses entirely on experience and evidence as it relates to sensory perception. Empiricism is a philosophical school holding that knowledge can only be (or is primarily) gained from sensory experience. Accordingly, it rejects any (or much) use of a priori reasoning in the gathering and analysis of knowledge. It rivals rationalism according to which reason is the ultimate source of knowledge. The philosophy of empiricism was first put forth in John Locke’s An Essay Concerning Human Understanding. Locke argued that the only way by which human acquire knowledge is through experience. Locke firmly argued that humans are incapable of formulating or possessing inherent ideas. The aim of this paper is to explain that the traditional empiricist standpoint in the fields of epistemology and then try to show that it is not adequate for explaining some things relevant to these fields. For that the traditional empiricist methods needs to be supplemented by extra-logical principles that are not strictly empirical.
Mixed Convection Boundary Layer Flow over a Vertical Flat Plate with Radiative Heat Transfer  [PDF]
Sadia Siddiqa, M. A. Hossain
Applied Mathematics (AM) , 2012, DOI: 10.4236/am.2012.37104
Abstract: In this article, the problem of mixed convection boundary layer flow of viscous fluid along a heated vertical plate is examined. In the analysis radiative component of heat flux emulates the surface temperature. Appropriate set of variables are embraced here which reduces the governing boundary layer equations into dimensionless form. Subsequently, a group of continuous transformation is applied on the dimensionless equations in order to obtain the parabolic partial differential equations for the regimes where modified Richardson number, Ri*, is 1) small i.e. when Ri* 1, 2) large i.e. when Ri* 1, and 3) covers all its values i.e. when 0 ≤ Ri* ≤ ∞. The system of equation for the corresponding regimes are thus integrated numerically via straightforward finite difference method along with Gaussian elimination technique. Its worth mentioning that results obtained here are valid particularly for the liquid metals for which Pr 1. Moreover, the numerical results are demonstrated graphically by showing the effects of important physical parameters, namely, the modified Richardson number (or mixed convection parameter), Ri*, surface radiation parameter, R, and Prandtl number, Pr, in terms of local skin friction and local Nusselt number coefficients. In addition, comprehensive interpretation of thermal energy distributions is also given in terms of heatlines which is termed as good tool to visualize the flow patterns.
Bayesian Estimation and Prediction for the Maxwell Failure Distribution Based on Type II Censored Data  [PDF]
Anwar M. Hossain, Gabriel Huerta
Open Journal of Statistics (OJS) , 2016, DOI: 10.4236/ojs.2016.61007
Abstract: We present Bayes estimators, highest posterior density (HPD) intervals, and maximum likelihood estimators (MLEs), for the Maxwell failure distribution based on Type II censored data, i.e. using the first r lifetimes from a group of n components under test. Reliability/Hazard function estimates, Bayes predictive distributions and highest posterior density prediction intervals for a future observation are also considered. Two data examples and a Monte Carlo simulation study are used to illustrate the results and to compare the performances of the different methods.
Effect of Black Pointed Seed in Seed Sample on Leaf Spot Severity and Grain Infection of Wheat in the Field
M. M. Hossain,I. Hossain
Pakistan Journal of Biological Sciences , 2001,
Abstract: Seed samples having different levels of black pointed seed were used in this study. Lowest leaf spot severity (3.36) was found in plots where best seed was sown in the field. Increased number of black pointed seed in the seed sample resulted in formation of higher number of seeds having black point infection in the field. Highest number (82.13 %) of grade-0 (apparently healthy) seeds were obtained from the plots where best seed was used. Formation of black pointed free grain in the field did not differ significantly up to seed sample containing 10 % black pointed seed. Laboratory test revealed that seeds of grade-5 yielded 74.55 % higher incidence of Bipolaris sorokiniana over seeds of grade-0. Incidence of Fusarium also increased with increase in black point infection but incidence of Alternaria tenuis and Curvularia lunata did not show any specific relation with severity of black point infection in grain. Higher incidence of B. sorokiniana was yielded from the embryo end of both seeds of grade-0 (25.30 %) and grade-1 (2.50 %) than the endosperm.
On Constructing Approximate Convex Hull  [PDF]
M. Zahid Hossain, M. Ashraful Amin
American Journal of Computational Mathematics (AJCM) , 2013, DOI: 10.4236/ajcm.2013.31A003
Abstract:

The algorithms of convex hull have been extensively studied in literature, principally because of their wide range of applications in different areas. This article presents an efficient algorithm to construct approximate convex hull from a set of n points in the plane in O(n+k) time, where k is the approximation error control parameter. The proposed algorithm is suitable for applications preferred to reduce the computation time in exchange of accuracy level such as animation and interaction in computer graphics where rapid and real-time graphics rendering is indispensable.

Error Performance Analysis to Increase Capacity of A Cellular System Using SDMA
Md. M. Hossain,J. Hossain
Computer Science , 2010,
Abstract: One of the biggest drawbacks of the wireless environment is the limited bandwidth. However, the users sharing this limited bandwidth have been increasing considerably.Space Division Multiple Access (SDMA) is a new technology by which the capacity of existing mobile communication systems can economically be increased. This paper has been presented how the capacity can be enhanced by using SDMA with smart antennas in mobile communications system. Based on Adaptive Antenna Array (AAA) technology the spatial dimension of the existing system is exploited by means of forming independent radio beams in each of the original channels. This paper analyses the comparison of average Bit Error Rate (BER) of SDMA and CDMA technique and the different ways in which SDMA can be introduced to increase the capacity of a cellular system. The probability of error is found for a standard omni directional base station antenna, and another set of curves is found for flat top beam having a directivity of 5.1dB. It is assumed that k separate flat top beams can be formed by base station and pointed each of the k users within the cell of interest. Noticing that for an average probability of error greater than 0.1 in a propagation path loss environment of n=4, the flat top beam will support 200 users, whereas the omni-directional antenna will support only 50 users. This increase the number of user is roughly equal to the directivity offered by the flat top beam system, and illustrates the promise SDMA offers for improving capacity in wireless system. Here multipath fading is not considered.
Relation between Individual and Society  [PDF]
F. M. Anayet Hossain, Md. Korban Ali
Open Journal of Social Sciences (JSS) , 2014, DOI: 10.4236/jss.2014.28019
Abstract: The relation between individual and society is very close. Essentially, “society” is the regularities, customs and ground rules of antihuman behavior. These practices are tremendously important to know how humans act and interact with each other. Society does not exist independently without individual. The individual lives and acts within society but society is nothing, in spite of the combination of individuals for cooperative effort. On the other hand, society exists to serve individuals—not the other way around. Human life and society almost go together. Man is biologically and psychologically equipped to live in groups, in society. Society has become an essential condition for human life to arise and to continue. The relationship between individual and society is ultimately one of the profound of all the problems of social philosophy. It is more philosophical rather than sociological because it involves the question of values. Man depends on society. It is in the society that an individual is surrounded and encompassed by culture, as a societal force. It is in the society again that he has to conform to the norms, occupy statuses and become members of groups. The question of the relationship between the individual and the society is the starting point of many discussions. It is closely connected with the question of the relationship of man and society. The relation between the two depends upon one fact that the individual and the society are mutually dependent, one grows with the help of the other. The aim of this paper is to show the questions: how a man is a social animal and how individual and society affect each other?
Performance Evaluation of Rectangular Microstrip Patch Antennas Loaded with Plastic and Barium-Titanate Substrates at GSM 1800 MHz Band  [PDF]
Mohammad Ababil Hossain, M. Shah Alam
Open Journal of Antennas and Propagation (OJAPr) , 2018, DOI: 10.4236/ojapr.2018.63004
Abstract:
In this paper, the resonance and radiation characteristics of patch antennas fabricated with two different types of dielectric substrates have been investigated and compared at GSM 1800 MHz band. At first, the above-stated characteristics of a patch antenna loaded with conventional plastic substrate have been investigated. Later a high permittivity dielectric material (barium titanate) has been used as the antenna substrate. The main goal here is to reduce the antenna size with a high permittivity dielectric material and then to compare its resonance and radiation performance with the earlier low permittivity substrate loaded prototype. It is found that with the use of high permittivity substrate the antenna volume gets smaller (about 6% of the plastic substrate prototype) although the gain decreases by around 2.5 dB.
Generalized Minimum Perpendicular Distance Square Method of Estimation  [PDF]
Rezaul Karim, Morshed Alam, M. M. H. Chowdhury, Forhad Hossain
Applied Mathematics (AM) , 2012, DOI: 10.4236/am.2012.312266
Abstract: In case of heteroscedasticity, a Generalized Minimum Perpendicular Distance Square (GMPDS) method has been suggested instead of traditionally used Generalized Least Square (GLS) method to fit a regression line, with an aim to get a better fitted regression line, so that the estimated line will be closest one to the observed points. Mathematical form of the estimator for the parameters has been presented. A logical argument behind the relationship between the slopes of the lines and has been placed.
The Central Cattle Breeding and Dairy Farm, Bangladesh waste contributes in emergence and spread of aminoglycoside-resistant bacteria  [PDF]
Sohel Ahmed, M. Ibrahim Hossain, Tareq Hossan, K. M. Rokibul Islam, orhan Uddin, M. Badier Rahman, M. Anwar Hossain
Advances in Bioscience and Biotechnology (ABB) , 2013, DOI: 10.4236/abb.2013.42A038
Abstract:
Aminoglycosides are one of the categories of antibiotics most frequently used in treating several cattle diseases at the Central Cattle Breeding and Dairy Farm (CCBDF), Savar,Dhaka,Bangladesh. Untreated veterinary clinical healthcare waste (VCHW) of diseased cattle at CCBDF which directly disposed to surrounding may contribute to the antibiotic resistant bacteria pollution (ARB) pollution. The investigation analyses the role of VCHW of CCBDF in spreading ARB. Here we studied1) veterinary clinical data and antibiotics treatment history; 2) total and resistant bacteria counts in fecal samples of healthy and diseased cattles as well as VCHW of CCBDF; and 3) finally, data analysis to estimate the burden of VCHW of CCBDF in the pollution of environment with aminoglycoside antibiotics resistant bacteria. The results conclusively demonstrate the spread of 3 different aminoglycoside antibiotics, namely genta- mycin, kanamycin and streptomycin resistant bacte- ria in the surrounding environment alarmingly with high significant value (p < 0.01 - 0.05). This study re- veals the risks to the cattle as well as public health posed by the random VCHW disposal at the CCBDF, Bangladesh.
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