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Search Results: 1 - 10 of 1275 matches for " Farid Ahsan "
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Mammalian Fauna and Conservational Issues of the Baraiyadhala National Park in Chittagong, Bangladesh  [PDF]
Rezaul Karim, Farid Ahsan
Open Journal of Forestry (OJF) , 2016, DOI: 10.4236/ojf.2016.62011
Abstract: Mammals were studied at the Baraiyadhala National Park, Chittagong from August 2012 to July 2013. Twenty nine species of mammals belonging to 26 genera, 17 families and 9 orders were recorded. Of the recorded species, 2 were primates, 10 rodents, 1 lagomorph (hare), 5 chiropterans (bats), 1 manid, 7 carnivores and 3 ungulates. Rodentia appeared as the largest family contained 10 speices. The overall mammalian population density was 239.12/km2. Irrawardy squirrel (Callosciurus pygerythrus) scored the highest density (112.97/km2) and several species attained the lowest (1/km2 each). Local status (relative abundance) of mammals assessed where 15 (51.72%) species were rare, and according to National Conservation Status, 13 (44.82%) were remarked as threatened species of that area. There were some major threats to the park such as forest fire, encroachment of forest and forest edges by both tribal and landless people, illegal exploitation of forest resources, grazing of livestock and unavailable water reservoirs.
Local People’s Perceptions of Crop Damage by Common Langurs (Semnopithecus entellus) and Human-langur Conflict in Keshabpur of Bangladesh
Ummay Habiba Khatun,M. Farid Ahsan,Eivin R?skaft
Environment and Natural Resources Research (ENRR) , 2012, DOI: 10.5539/enrr.v3n1p111
Abstract: We studied crop damage and human-langur conflicts in six villages of Keshabpur upazila in the Jessore district of Bangladesh from September 2009 to August 2010. Data were collected by interviewing local people with a questionnaire. We discuss the attitudes of locals towards crop damage inflicted by the common langur (Semnopithecus entellus). We analysed local deterrent methods for reducing crop damage and the management strategy adopted by the Forest Department to conserve langurs. Thus, we investigated how demographic variables were associated with the perceptions of locals towards crop damage and conflicts. A total of 27 different crop species were cultivated across the villages, among which langurs mostly damaged fruits. Although most damage occurred during the fruiting season langurs damaged crops throughout the year. Around 55 % of the respondents reported that the local deterring methods were effective but that they affect their children’s education and economy. Furthermore, almost 59 % of the respondents were tolerable towards the langur damage. People living in villages with a high langur population and where weak conservation methods were used reported greater crop damage than their counterparts. A linear regression analysis revealed that the occupation, landholding status, and ethical and religious beliefs of the people included in this study has a significant impact on their attitudes regarding conservation. Therefore, there is an urgent need to implement conservation measures to mitigate human-langur conflicts as well as to conserve common langurs in areas where humans and langurs coexist.
On Classes of Matrices with Variants of the Diagonal Dominance Property  [PDF]
Farid O. Farid
Advances in Linear Algebra & Matrix Theory (ALAMT) , 2017, DOI: 10.4236/alamt.2017.72005
Abstract: We study the relations between several classes of matrices with variants of the diagonal dominance property, and identify those classes which form pairs of incomparable classes. For an incomparable pair (X1,X2) of classes of matrices with variants of the diagonal dominance property, we also study the problem of providing sufficient conditions for the matrices in Xi to be in Xj with {i,j}={1,2}. The article is a continuation of a series of articles on the topic and related topics by the author; see [1][2][3][4].
On the Effects of Complex Conjugate Medium on TM Scattering by a Strip  [PDF]
Amjad Imran, Ahsan Illahi
Journal of Electromagnetic Analysis and Applications (JEMAA) , 2011, DOI: 10.4236/jemaa.2011.37043
Abstract: In this paper, Method of Kobayashi Potential is used to determine the scattering behavior of a strip which is placed at the air-complex conjugate medium interface. And discussion is presented that how the complex conjugate medium mod-ify the scattering properties of the strip. A comparison is also given with that if we replace the conjugate medium with standard dielectric medium. E-polarized electromagnetic plane wave is supposed to be obliquely incident upon the ge-ometry. Scattered fields in both the half spaces are supposed in terms of unknown weighting functions. Discontinuous properties of Weber-Schafheitlin integral and orthogonal properties of Jacobi’s polynomials are used to determine these unknown weighting functions. Far scattered fields have been calculated using Saddle Point Method and computed for different parameters of interest.
Inflow Outflow Effect and Shock Wave Analysis in a Traffic Flow Simulation  [PDF]
Ahsan Ali, Laek Sazzad Andallah
American Journal of Computational Mathematics (AJCM) , 2016, DOI: 10.4236/ajcm.2016.62007
Abstract: This paper investigates the effect of inflow, outflow and shock waves in a single lane highway traffic flow problem. A constant source term has been introduced to demonstrate the inflow and outflow. The classical Lighthill Whitham and Richards (LWR) model combined with the Greenshields model is used to obtain analytical and numerical solutions. The model is treated as an IBVP and numerical solutions are presented using Lax Friedrichs scheme. Godunov method is also used to present shock wave analysis. The numerical procedures adopted in this investigation yield results which are very much consistent with real life scenario in terms of traffic density and velocity.
Some torsion theoretical characterizations of rings
Javed Ahsan
International Journal of Mathematics and Mathematical Sciences , 1984, DOI: 10.1155/s0161171284000302
Abstract: Rings whose torsion free modules are quasi-injective, quasi-projective or coflat have been characterized in the context of certain torsion theories.
Performance of Six Maize (Zea mays L.) Inbred Lines and Their all
Possible as Well as Reciprocal Cross Combinations

M. Ahsan
Pakistan Journal of Biological Sciences , 1999,
Abstract: The present work consisted of six elite, exotic and local maize inbred lines and their all possible as well as reciprocal cross combinations. This values of coefficients of variation were found to be lower for all agronomic traits except grain yield per plant (22.83%). Genotypic correlation coefficients had higher magnitude than the phenotypic correlation coefficients. Phenotypic correlation coefficients were found to significant and positive between leaf area, leaf angle, number of leaves per plant, plant height and grain yield. They were found negative and significant between days taken to tasseling, days taken to silking and grain yield. However, it is concluded from these results that grain yield can be improved by increasing leaf angle, leaf area, number of leaves per plant and plant height.
Role of Vocabulary for Semantic Interoperability in Enabling the Linked Open Data Publishing
Ahsan Morshed
International Journal of Database Management Systems , 2012,
Abstract: In spite of the explosive growth of the Internet, information relevant to users often unavailable even when using the latest browsers. At the same time, there is an ever increasing number of documents that varywidely in content, format and quality. The documents often change in content and location because they do not belong to any kind of centralized control. On the other hand, there is a huge number of unknown users with extremely diverse needs, skills, education, and cultural and language backgrounds. One of the solutions to these problems might be to use standard terms with meaning, this can be termed as controlled vocabulary (CV). Though there is no specific notion of CV, we can define it as a set of concepts or preferred terms and existing relations among them. In this paper, we focus on the role of CV for publishing the web of Data on the web.
Growth Opportunities, Earnings Permanence and the Valuation of Free Cash Flow
Ahsan Habib
Australasian Accounting Business and Finance Journal , 2011,
Abstract: This paper examines empirically the effect of firm growth opportunities and earnings quality on the market valuation of free cash flow, defined as the difference between operating cash flows and capital expenditures. Equity valuation theory prescribes that free cash flow should not be associated with stock returns because itdoes not add value. However, free cash flow could become a value-relevant construct in certain contexts. This study considers growth opportunities and transitory earnings as two such contexts and examines the valuation of free cash flow. An accounting-based valuation framework is developed where stock returns are regressed onfree cash flow interacted with growth and earnings quality proxies, after controlling for book values, dividends, and current earnings realisations. Findings reveal that firms with a positive free cash flow and attractive growth opportunities command a valuation premium. Furthermore, free cash flow is found to be positively associatedwith stock returns when earnings are transitory. The results are robust to alternative definitions of both free cash flow and growth opportunities.
Correlation-dependent coherent to incoherent transitions in resonant energy transfer dynamics
Ahsan Nazir
Physics , 2009, DOI: 10.1103/PhysRevLett.103.146404
Abstract: I investigate energy transfer in a donor-acceptor pair beyond weak system-bath coupling. I identify a transition from coherent to incoherent dynamics with increasing temperature, due to multi-phonon effects not captured by a standard weak-coupling treatment. The crossover temperature has a marked dependence on the degree of spatial correlation between fluctuations experienced at the two system sites. For strong correlations, this leads to the possibility of coherence surviving into a high temperature regime.
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