Generalized Analogs of the Heisenberg Uncertainty Inequality

We investigate locally compact topological groups for which a generalized analogue of Heisenberg uncertainty inequality hold. In particular, it is shown that this inequality holds for $\mathbb{R}^n \times K$ (where $K$ is a separable unimodular locally compact group of type I), Euclidean Motion group and several general classes of nilpotent Lie groups which include thread-like nilpotent Lie groups, $2$-NPC nilpotent Lie groups and several low-dimensional nilpotent Lie groups

Comparison between bipolar vessel sealer (LigaSure vessel sealer) and harmonic scalpel in total laparoscopic hysterectomy

Background: The aim of the present study was to compare the use of bipolar Vessel Sealer with Harmonic Scalpel (HS) during total laparoscopic hysterectomy with respect to estimated blood loss and related postoperative complications.Methods: A retrospective study was conducted in the Jeevan Jyoti hospital and Guru Gobind Singh Memorial Vanadana Women’s hospital, Allahabad, U.P., India. Two forty two patients were enrolled who underwent total laparoscopic hysterectomy and were randomized into two homogenous groups: bipolar vessel sealer and harmonic scalpel.Results: Estimated blood loss was significantly less in bipolar vessel sealer when compared with harmonic scalpel. No significant difference was observed in postoperative complications.Conclusions: The bipolar vessel sealer is a reliable and safe tool for reducing intraoperative blood loss in patients undergoing total laparoscopic hysterectomy. More randomized studies need to be done to confirm the advantages of this technique.

STATISTICAL HANDLING OF MEDICAL DATA - AN ETHICAL PERSPECTIVE

Medical Science is a delicate subject and the clinical data generated from the medical trials must be reliable and of good quality. Not only the quality of generated data is important, but the management is also crucial and is to be handled very carefully. In this paper, the ethical aspect of statistical handling of such data is discussed. Every profession has some set of norms to follow to achieve its objectives. These norms are called professional ethics which shows the essence of human behaviour. Same way, the field of medical research is expected to follow ethical norms, to obtain reliable and true results. Being a biostatistician, I would like to share my experiences to highlight that how the ethical norms are violated especially during data collection and data analysis, while conducting a trial in a health setup. In a follow-up study, correlated data recorded by the postgraduate students, health workers and field workers is highly biased in the desire of establishing the favourable effectiveness of their intervention. It is also seen that they have the tendency of manipulating the data at the time of analysis to have desirable outcomes. They fix in their mind to prove a drug effective, even when it is ineffective. Students are more prone to this practice. Sometimes, even the statistician apart from the students and health professionals, does not have adequate knowledge to apply the right test, which leads to wrong decisions. All these practices are un-ethical and all the members involved at any level in a trial must be made well aware, and must understand that these results are going to be applied on human beings, where one do not have a second chance to try. So, they should stick to the principles of honesty and truthfulness. In a clinical trial, reliability of data and results is very important. Biostatisticians must also understand that instead of applying wrong test, it is better to consult their seniors and should not indulge themselves in suppressing the true facts. It is their responsibility to translate the statistical interpretation of the results into medical interpretation

Reversal in declining trend of adult mortality in many states of India, 1970-2001: Is it due to AIDS?

Objectives: To investigate the reversal in adult mortality trend from declining to rising in some segments of population in India, and to use an indirect demographic method to examine if this increase could be due to AIDS mortality. Also, to estimate the total excess deaths. Design: Cross-sectional data on age-specific death rate in 5-year age-intervals from 25 to 44 years for the years 1970 to 1998 for rural/urban and male/female segments for each of 16 major states of India obtained from the government reports, and their projections till the year 2001. Methods: In view of reversal of trend in some areas, we tried to fit a parabola to the observed rates in each segment. A statistically significant fit in some segments revealed the year with least mortality rate when the reversal started. Another fit was obtained by projection of the previously declining trend. Excess deaths were estimated by applying the excess death rate to the population of the segment where reversal in trend was significant. Results: Reversal in declining mortality trend was detected in 65 of a total 256 age-sex-area (urban/rural) segments that we examined. Fourteen of the 16 States revealed reversal in at least one segment. The year of reversal in most segments coincides fairly well with the anticipated year of start of substantial AIDS mortality. At the national level, a total of at least 214,390 deaths till 2001 were revealed as excess by this method. This number is quite low relative to the deaths otherwise attributed to AIDS in the country. Contrary to belief, increase in mortality due to AIDS was seen more commonly in rural areas than in urban areas, and more in females than in males. Conclusions: The indirect demographic method of estimating AIDS deaths in India yields an apparently low number of deaths, and does not confirm the belief that AIDS in India is spreading from urban to rural, and from male to female populations. Keywords: AIDS deaths, Mortality trend reversal, States of India, Age-specific death rates, Demographic metho

Reliability of the Model for Clustering of Longitudinal datasets of Infant Mortality Rate in India

Because of the natural tendency of human beings and heavenly bodies to form groups, the technique of cluster analysis or segmentation analysis find its importance and applications in many fields of study. A model for clustering of time trends was proposed by authors whose beauty is that 2-way dimensions that is the horizontal flow of the trend and vertical distance of the trend from a common base are considered to obtain the natural clusters. In the present paper, the reliability of this model is studied in two steps namely (i) by repeating the analysis but using different interval distance measures and (ii) by repeating the analysis but using different hierarchical clustering techniques. Dissimilarity coefficients were calculated for the time trends of infant mortality rates in India using this model. In SPSSv17.0, four different clustering methods were applied using generalized power function. Agglomeration schedules were obtained and elbow criterion diagrams were made for each trend. Five stable clusters were suggested by these methods. K-means clustering technique was applied to obtain the actual members of these five clusters

Comparative lipid profile study between ischemic and haemorrhagic stroke

Background: Stroke is one of the major global health problems. Stroke is the most common clinical manifestation of cerebrovascular disease of which more than 99% are due to arterial involvement and less than 1% due to venous involvement in the form of Cerebral Venous Thrombosis (CVT). Among arterial causes 85% are due to infarction and 15% due to haemorrhage.1,2 There is  difference in serum lipid levels in subtypes of strokes to guide lipid-lowering therapy which can reduce incidence of stroke and stroke related mortality by adapting primary and secondary preventive measures.3,4  Authors have endeavoured to correlate severity of lipid derangement and stroke.Methods: In this study 64 consecutive eligible ischaemic stroke cases and 64 eligible hemorrhagic stroke cases would be included. Cases of strokes will be divided into ischaemic and hemorrhagic as per clinical features and with help of brain imaging by CT scan and MRI at the time of admission and 8 hour fasting lipid profile was collected from all cases. All this information will be filled in preformed format.Results: Serum lipid profile of two categories of stroke showed raised serum total cholesterol in 39.1% patients of ischaemic stroke in contrast to 18.8% patients with haemorrhagic stroke (p=0.019).Stroke patients showed raised in LDL cholesterol in 29.7% patients of ischaemic stroke in contrast to 9.4% patients with haemorrhagic stroke, (p=0.007).Conclusions: Based on the finding of our study we conclude that ischemic stroke patient had higher lipid derangement as compare to haemorrhagic stroke in terms of raise total cholesterol, LDL cholesterol and decrease HDL cholesterol

Formulation of SrO-MBCUS Agglomerates for Esterification and Transesterification of High FFA Vegetable Oil

Musa Balbisiana Colla Underground Stem (MBCUS) catalyst was treated thermally mixing with 5:1 w/w of Strontium Oxide (SrO) and the dynamic sites were reformed. The MBCUS-SrO showed sharper crystalline phases as evidence from XRD and TEM analysis. The composition and morphology were characterized from BET, SEM, EDX thermo-gravimetric analysis (TGA) and XRF analysis. The optimization process for biodiesel production from Jatropha curcas L oil (JCO) having high percentage of free fatty acids was carried out using orthogonal arrays adopting the Taguchi method. The linear equation was obtained from the analysis and subsequent biodiesel production (96% FAME) was taken away from the JCO under optimal reaction conditions. The biodiesel so prepared had identical characteristics to that with MBCUS alone, but at a lower temperature (200˚C) and internal vapour pressure. Metal leaching was much lower while reusability of the catalyst was enhanced. It was also confirmed that the particle size has little impact upon the conversion efficacy, but the basic active sites are more important.

Stack Contention-alleviated Precharge Keeper for Pseudo Domino Logic

The dynamic circuits are supposed to offer superior speed and low power dissipation over static CMOS circuits. The domino logic circuits are used for high system performance but suffer from the precharge pulse degradation. This article provides different design topologies on the domino circuits to overcome the charge sharing and charge leakage with reference to the power dissipation and delay. The precharge keeper circuit has been proposed such that the keeper transistors also work as the precharge transistors to realize multiple output function. The performance improvement of the circuit’s analysis have been done for adders and logic gates using HSPICE tool. The proposed keeper techniques reveal lower power dissipation and lesser delay over the standard keeper circuit with less transistor count for different process variation

COMPARISON OF DENOISING FILTERS ON COLOUR TEM IMAGE FOR DIFFERENT NOISE

TEM (Transmission Electron Microscopy) is an important morphological characterization tool for Nanomaterials. Quite often a microscopy image gets corrupted by noise, which may arise in the process of acquiring the image, or during its transmission, or even during reproduction of the image. Removal of noise from an image is one of the most important tasks in image processing. Denoising techniques aim at reducing the statistical perturbations and recovering as well as possible the true underlying signal. Depending on the nature of the noise, such as additive or multiplicative type of noise, there are several approaches towards removing noise from an image. Image De-noising improves the quality of images acquired by optical, electro-optical or electronic microscopy. This paper compares five filters on the measures of mean of image, signal to noise ratio, peak signal to noise ratio & mean square error. In this paper four types of noise (Gaussian noise, Salt & Pepper noise, Speckle noise and Poisson noise) is used and image de-noising performed for different noise by various filters (WFDWT, BF, HMDF, FDE, DVROFT). Further results have been compared for all noises. It is observed that for Gaussian Noise WFDWT & for other noises HMDF has shown the better performance results