22 research outputs found

    Moment based object recognition and reconstruction

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    In this thesis, the problem of object recognition and reconstruction is adderessed using image moments. Initially, scale, rotation and translation invariants properties of Geometric moments are studies. The centralm moments are translation invarants moments, are in used for object recognition

    Informal Sector and Corruption: An Empirical Investigation for India

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    India is a country characterized by a huge informal sector. At the same time, it is a country where the extent of corruption in every sector is remarkably high. Stifling bureaucratic interference and corruption at every stage of economic activities is one of the main reasons behind high participation in informal and unregulated sectors. For economies characterized by high inequality and poverty, a useful tool for the government to pacify social unrest, is to choose a lower level of governance allowing substantial corruption in the system. Based on a study of 20 Indian states, we empirically show that higher corruption increases level of employment in the informal sector. Further, our analysis also shows that for higher levels of lagged state domestic product, the positive impact of corruption on the size of the informal sector is nullified.informal sector, corruption, state domestic product, governance, India

    The unorganised sector and access to finance in rural India

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    A large number of studies have predominantly focused on the urban informal manufacturing sector broadly classified as the NDMEs and OAMEs. However, their rural counterparts, despite covering two-thirds of the units overall, are often neglected. These organizations suffer largely from lack of access to formal credit. This chapter offers an in-depth analysis of the access to finance by rural unorganised sectors in comparison to the larger agricultural sector. We also provide a sector-wise and state-wise analysis of volatility of gross value added and fixed assets for various industries within the realm of the rural unorganised sector in India. Finally, we discuss the role of micro-credit organizations in linking the formal credit agencies to the unorganised units in rural India

    Primary Sinonasal Tuberculosis: A Diagnostic Challenge

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    Primary sinonasal tuberculosis remains a diagnostic challenge as it mimics sinonasal granulomatous disease or neoplasms. Its characteristic signs and symptoms may be non-specific and highly variable. Here we report a unique clinical condition of a 24-year-old man who presented with unilateral nasal obstruction and epiphora for 2 years. He was without any comorbidity, was immunocompetent, and was otherwise healthy. Subsequent investigations, including a computed tomography scan of the paranasal sinuses, and perioperative findings revealed a sinonasal mass involving the lateral nasal wall and paranasal sinuses. The histopathology was consistent with the features of tuberculosis. There was no evidence of pulmonary or any other primary tubercular foci elsewhere in the body, suggesting the diagnosis of primary sinonasal tuberculosis

    Role of offending out-door aero-allergen and CD14 C(-159)T polymorphism in development and severity of asthma in a Kolkata patient population

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    Objective: Present study involved identification of offending out-door aero-allergens and associated genetic pathway in nasso-bronchial asthma among Kolkata population.Methods: Skin-prick test was done among 950 asthmatic patients against 11 common aero-allergens and total serum IgE concentration was measured. PCR-RFLP was done in patients and non-asthmatic control (n=220 in each) to characterize functional polymorphism, C(-159)T, of CD14, a positional candidate gene for allergy. Association of genetic polymorphisms was made with clinico-pathological conditions.Results: We identified Cocos nucifera as the most common aero-allergen sensitizer among atopic patients in Kolkata. Patients with childhood-onset asthma were significantly more sensitive towards aero-allergens and had significantly higher serum IgE level than those of adult-onset (p< 0.0001). No significant difference was found in distribution of SNP genotypes of CD14 among case and control (p=0.178). However among patients, frequency of C allele is significantly higher in childhood-onset group thanthat of adult-onset and concordantly in former CC genotype was associated with significant higher level of serum IgE than CT and TT.Conclusion: In Kolkata, pollen is a common out-door aero-allergen and Cocos nucifera is predominant among pollens. Childhood- onset and adult-onset of asthma showed significant difference in allergen sensitivity as well as genetic background with respect to CD14 polymorphism.Keywords: Asthma, aero-allergen, skin prick test, total IgE, CD14 gene polymorphis

    Generalized Model for Λ\Lambda-Dark Energy

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    Einstein field equations under spherically symmetric space-times are considered here in connection to dark energy investigation. A set of solutions are obtained for a kinematical Λ\Lambda model, viz., Λ(a˙/a)2\Lambda \sim (\dot a/a)^2 without assuming any {\it a priori} value for the curvature constant and the equation of state parameter ω\omega. Some interesting results, such as the nature of cosmic density Ω\Omega and deceleration parameter qq, have been obtained with the consideration of two-fluid structure instead of usual uni-fluid cosmological model.Comment: 8 Latex page

    Dark energy models with time-dependent gravitational constant

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    Two phenomenological models of Λ\Lambda, viz. Λ(a˙/a)2\Lambda \sim (\dot a/a)^2 and Λa¨/a\Lambda \sim \ddot a/a are studied under the assumption that GG is a time-variable parameter. Both models show that GG is inversely proportional to time as suggested earlier by others including Dirac. The models considered here can be matched with observational results by properly tuning the parameters of the models. Our analysis shows that Λa¨/a\Lambda \sim \ddot a/a model corresponds to a repulsive situation and hence correlates with the present status of the accelerating Universe. The other model Λ(a˙/a)2\Lambda \sim (\dot a/a)^2 is, in general, attractive in nature. Moreover, it is seen that due to the combined effect of time-variable Λ\Lambda and GG the Universe evolved with acceleration as well as deceleration. This later one indicates a Big Crunch.Comment: Latex, 6 page
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