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H.C. Reddy C.P. Reddy M.N.S. Swamy V. Ramachandran 《Journal of The Franklin Institute》1982,313(4):197-206
In this paper a method for the realization of RC transfer immittance functions with an unsymmetrical lattice is presented. The method yields minimal capacitor realizations for Z12(s) with no pole at s = 0 and ?y12(s) having no pole at s = ∞. The number of resistors needed are only two more than the minimum needed. 相似文献
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M.O. Ahmad C.H. Reddy V. Ramachandran M.N.S. Swamy 《Journal of The Franklin Institute》1979,307(2):71-81
Necessary and sufficient conditions are obtained for the realization of an m-variable positive real function (PRF) as the impedence function of a resistively-terminated ladder network of m lossless two-ports connected in cascade. Each two-port is a single-variable lossless ladder with all of its transmission zeros either at the origin or at finity. Conditions are also obtained when each of the two-ports is a Fujisawa-type lowpass ladder. 相似文献
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Comparison of two Actigraph models for assessing free-living physical activity in Indian adolescents
Corder K Brage S Ramachandran A Snehalatha C Wareham N Ekelund U 《Journal of sports sciences》2007,25(14):1607-1611
This aim of this study was to compare the new Actigraph (GT1M) with the widely used Model 7164. Seven days of free-living physical activity were measured simultaneously using both the Model 7164 and GT1M in 30 Indian adolescents (mean age 15.8 years, s = 0.6). The GT1M was on average 9% lower per epoch than model 7164, thus a correction factor of 0.91 is suggested for comparison between the two monitors. The differences between monitors increased in magnitude with intensity of activity (P < 0.001) but remained randomly distributed (r = 0.01, P = 0.96). No significant difference was observed between monitors for time spent in moderate (P = 0.31) and vigorous (P = 0.34) physical activity when using the same epoch length. The Model 7164 classified less time as sedentary (P < 0.001) and more time as light-intensity activity (P < 0.001) than the GT1M. In conclusion, data from the GT1M can be compared with historical data using average counts per minute with a correction factor, and the two models might be comparable for assessing time spent in moderate to vigorous physical activity in children when using the same epoch length. 相似文献
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B. Raman V. Ramachandran M.O. Ahmad M.N.S. Swamy 《Journal of The Franklin Institute》1982,313(6):353-372
This paper discusses a multivariable array whose elements are multivariable homogeneous polynomials which may have missing terms in any of the variables. This array permits one to obtain conditions for the realizability of a driving-point function or a transfer function as a resistively terminated low-pass ladder network. By reac- tance transformations, other forms of ladder structures can be obtained. The case of cascade-separable ladder networks is discussed in detail. 相似文献
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In this paper, a method for the design of 2-D analog and recursive digital filters is presented. Starting from a structure in the analog domain, suitable even or odd parts of two-variable Hurwitz polynomials are generated. This enables 2-variable very strictly Hurwitz polynomials (VSHP) to be obtained,2 thus avoiding non-essential singularities of the second kind. Thus it will ensure a stable 2-D recursive digital filter obtained by the use of bilinear transformations. Examples are given to illustrate the method. 相似文献
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R. L. Gupta K. Ramachandran Monika J. S. Chowhan 《Indian journal of clinical biochemistry : IJCB》1996,11(1):59-61
Urinary excretion of beta-aminoisobutyric acid (BAIB), was determined in 28 active and 12 inactive bladder cancer patients.
Mean excretion of BAIB was higher in active cancer patients-187.8 mg/24 hours whereas it was 120.4 mg/24 hours in inactive
cancer patients. The increased BAIB excretion in both disease groups was independent of tumour stage. BAIB appears to be a
useful diagnositic aid in the assessment of bladder cancer patients. 相似文献
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Sunil Jonathan Holla Kalpana Ramachandran Bina Isaac Shajan Koshy 《Anatomical sciences education》2009,2(4):179-183
Authors report here a survey of medical student feedback on the effectiveness of two different anatomy curricula at Christian Medical College, Vellore, India. Undergraduate medical students seeking the Bachelor in Medicine and Bachelor in Surgery (M.B.B.S.) degrees were divided into two groups by the duration of their respective anatomy curriculum. Group 1 students had completed a longer, 18‐month curriculum whereas Group 2 counterparts followed a shorter, 12‐month curriculum. Students' responses to a questionnaire were studied. Analysis of feedback from Groups 1 and 2 contrasted the effectiveness of the two anatomy curricula. The coverage of gross anatomy was rated adequate or more than adequate by 98% of Group 1 and 91% of Group 2. A desire for greater emphasis on gross anatomy teaching was expressed by 24% of Group 1 and 50% of Group 2 (P = 0.000). Two‐thirds of all students felt that the one‐year program was not adequate, and 90% of Group 1 and 74% of Group 2 felt that clinically oriented anatomy teaching required more emphasis. Dissection was helpful or very helpful for 94% of Group 1 and 88% of Group 2. This study suggests that a better understanding of gross anatomy was gained from a course of longer duration (18 months with 915 contact hr vs. 12 months with 671 contact hr). Students who completed the longer anatomy course had greater appreciation of the need for clinically oriented anatomy teaching and dissection. Anat Sci Educ 2:179–183, 2009. © 2009 American Association of Anatomists. 相似文献
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It is shown in this paper that Homogeneous Two-variable Reactance Polyno- mials (HTRP's) can be expressed as a product of linear factors in the two-variables. Further, a Homogeneous Two-variable Reactance Function (HTRF) can be characterized in terms of the alteration property involving the coefficients of the linear factors of the HTRP in the numerator and denominator. Synthesis procedures for HTRF's are discus- sed; these realizations follow from the single variable RL- or RC-functions associated with a HTRF. Additional properties of HTRF, which will enable us to generate Two- variable Positive Real Functions and Two-variable Reactance Functions are also discussed. 相似文献