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Weak phase information from the color suppressed B_d^0 -> D^{*0} K^{*0} modes
Giri, A. K.;Mawlong, B.;Mohanta, R.
High Energy Physics - Phenomenology , 2007, DOI: 10.1103/PhysRevD.76.093008
Abstract: The decay channels $B_d^0 \to D^{*0} K^{*0}$ are investigated for extracting weak $CKM$ phase information. These channels are described by color-suppressed tree diagrams only and are free from penguin contributions. The branching ratios for these channels are found to be $\sim \cal O $ $(10^{-5} - 10^{-6})$ which can be measured at the currently running $B$ factories. The method presented here may be well-suited to determine the phase $\gamma$.
Fuzzy production planning models for an unreliable production system with fuzzy production rate and stochastic/fuzzy demand rate
K. A. Halim,B. C. Giri,K. S. Chaudhuri
International Journal of Industrial Engineering Computations , 2011,
Abstract: In this article, we consider a single-unit unreliable production system which produces a single item. During a production run, the production process may shift from the in-control state to the out-of-control state at any random time when it produces some defective items. The defective item production rate is assumed to be imprecise and is characterized by a trapezoidal fuzzy number. The production rate is proportional to the demand rate where the proportionality constant is taken to be a fuzzy number. Two production planning models are developed on the basis of fuzzy and stochastic demand patterns. The expected cost per unit time in the fuzzy sense is derived in each model and defuzzified by using the graded mean integration representation method. Numerical examples are provided to illustrate the optimal results of the proposed fuzzy models.
Relation between increased anaerobic glycolysis and visual acuity in long-standing type 2 diabetes mellitus without retinopathy
Mondal L,Baidya K,Bhattacharya B,Giri A
Indian Journal of Ophthalmology , 2006,
Abstract: In long-standing diabetes mellitus, blood flow to essential organs including the retina is reduced owing to macrovascular and/or microvascular changes. Poor glycolytic pathway of glucose metabolism owing to tissue hypoxia caused by ischemia at capillary bed of essential organs produces excessive lactic acid and less of adenosine triphosphate, which lead to poor cellular function. The purpose of the study was to evaluate the relationship between increased anaerobic glycolysis and visual acuity in type 2 diabetes mellitus without retinopathy. Fifty patients of type 2 diabetes mellitus of 10-12 years duration, without retinopathy, constituted the study group. The controls were 50 age-matched healthy persons without diabetes mellitus. Blood lactate level and best-corrected visual acuity (BCVA) were measured in both the groups. The mean blood lactate level was 1.05 mM/l in the control group and 2.32 mM/l in the study group. BCVA of 20/20 (log MAR 0) was seen in 48 (96%) patients of the control group and in 27 (54%) patients of the study group. BCVA of 20/30 (log MAR 0.2) was seen in 23 (46%) patients in the study group and 2(4%) in the control group. Association of higher blood lactate level with decreased BCVA in the study group was statistically significant (P< 0.001).
Optimal batch production strategies under continuous price decrease and time discounting
Mandal S.,Giri B.C.,Chaudhuri K.S.
Yugoslav Journal of Operations Research , 2007, DOI: 10.2298/yjor0702165m
Abstract: Single price discount in unit cost for bulk purchasing is quite common in reality as well as in inventory literature. However, in today's high-tech industries such as personal computers and mobile industries, continuous decrease in unit cost is a regular phenomenon. In the present paper, an attempt has been made to investigate the effects of continuous price decrease and time-value of money on optimal decisions for inventoried goods having time-dependent demand and production rates. The proposed models are developed over a finite time horizon considering both shortages and without shortages in inventory. Numerical examples are taken to illustrate the developed models and to examine the sensitivity of model parameters.
Pattern of oral cancer registered at a tertiary care teaching hospital in rural Western Maharashtra
Purushottam A. Giri,Kailash K. Singh,Deepak B. Phalke
International Journal of Research in Medical Sciences , 2013, DOI: 10.5455/2320-6012.ijrms20130801
Abstract: Non-communicable diseases including cancer are emerging as major public health problems in India. Cancer usually means malignancy, has become one of the ten leading cause of death in India. The leading sites of cancer vary from country to country. Oral cancer ranks in the top three of all cancers in India, accounting for over 30% of all cancers reported in the country and its control is quickly becoming a global health priority. The present study was conducted to find out the contribution of different type of oral cancer in a tertiary care teaching hospital of western Maharashtra, India. A retrospective hospital record based study was carried out for the period of 2007-2011 in the department of Radiotherapy of Pravara Rural Hospital, Loni, Maharashtra, India. A total of 5879 patients who were diagnosed with cancer, of them 633 (10.76%) patients had oral cancer. Data was collected on the basis of the patient s record in the hospital and analyzed in the form of percentage and proportions whenever appropriate. A total of 633 oral cancer patients were screened, of which 411 (64.93%) were males and 222 (35.07%) were females. Among oral cancer, buccal mucosa was highest (37.12%); followed by tongue (36.80%), oropharynx (4.74%) and lip and palate (3.15%). Oral cancer is one of the common malignancies in developing countries like India. It is common in males compared to females and is usually seen after middle age. [Int J Res Med Sci 2013; 1(3.000): 233-236]
Impedance Spectroscopy of Zr Modified Ba5SmZr3V7O30 Ceramic  [PDF]
B. K. Giri, B. B. Mohanty, P. S. Sahoo, R. N. P. Choudhary
Open Access Library Journal (OALib Journal) , 2018, DOI: 10.4236/oalib.1104639
Abstract:
Ba5SmZr3V7O30 is a new tungsten bronze structured ceramic compound prepared by substituting Zr at Ti site in Ba5GdTi3V7O30 following high-temperature solid-state reaction route. The X-ray diffraction analysis of the compound confirms the formation of single-phase orthorhombic structures at room temperature. Surface morphology of the compound was studied by scanning electron microscopy. Using a Hioki LCR meter, the effects of temperature (32℃ - 500℃) and frequency (102 - 106 Hz) on structural and electrical properties were studied. Detailed analysis of impedance parameters furnishes a better conception of the electrical properties and type of relaxation processes in the material. The plateau region of the Z~ frequency plot also indicates the presence of relaxation process in the material. The bulk resistance is observed to be decreased with rise in temperature showing a typical negative temperature coefficient of resistance (NTCR) behavior.
Statistical Mechanics of DNA Rupture: Theory and Simulations
S. Nath,T. Modi,R. K. Mishra,D. Giri,B. P. Mandal,S. Kumar
Quantitative Biology , 2013, DOI: 10.1063/1.4824796
Abstract: We study the effects of the shear force on the rupture mechanism on a double stranded DNA. Motivated by recent experiments, we perform the atomistic simulations with explicit solvent to obtain the distributions of extension in hydrogen and covalent bonds below the rupture force. We obtain a significant difference between the atomistic simulations and the existing results in the iterature based on the coarse-grained models (theory and simulations). We discuss the possible reasons and improve the coarse-grained model by incorporating the consequences of semi-microscopic details of the nucleotides in its description. The distributions obtained by the modified model (simulations and theoretical) are qualitatively similar to the one obtained using atomistic simulations.
Exogenous Vitamin K3 and Peroxides Can Alleviate Hypoxia in Bean Seedlings (Phaseolus vulgaris L.)  [PDF]
C. B. Rajashekar, Jinmin Fu, Anju Giri
American Journal of Plant Sciences (AJPS) , 2014, DOI: 10.4236/ajps.2014.522355
Abstract:

Oxygen limiting conditions are a common occurrence in root zones of most crop plants and can adversely affect nearly all aspects of plant growth and development including its survival. The objective of this study was to determine the effectiveness of a novel redox cycling agent, vitamin K3, and various peroxides including hydrogen peroxide, calcium peroxide and magnesium peroxide in alleviating the effects of hypoxia in bean seedlings grown in nutrient culture. All the anti-hypoxic agents including vitamin K3 had a positive impact on the overall growth of bean seedlings under hypoxic conditions, but their responses were variable depending on the concentration. With regard to shoot growth, vitamin K3 (5 μM) increased the leaf area significantly, by more than 58% over the hypoxic control plants and produced the highest stem fresh weight similar to calcium peroxide (20 μM) and magnesium peroxide (10 μM). In addition, the use of vitamin K3 resulted in the highest accumulation of chlorophyll (chla + chlb) in the leaves, an increase of nearly two-fold over the hypoxic control plants. Furthermore under hypoxia, calcium peroxide (20 μM) and magnesium peroxide (10 μM) produced the highest leaf biomass (FW) followed by vitamin K3. Vitamin K3 (1 μM) also favored root growth in bean seedlings under hypoxia; it produced the largest increase in root length and root biomass (DW) similar to calcium peroxide and magnesium peroxide. Based on the overall shoot and root growth response of bean seedlings to various anti-hypoxic substances under hypoxic conditions, calcium peroxide, magnesium peroxide and vitamin K3

Elevated Carbon Dioxide Level Suppresses Nutritional Quality of Lettuce and Spinach  [PDF]
Anju Giri, Brenden Armstrong, Channa B. Rajashekar
American Journal of Plant Sciences (AJPS) , 2016, DOI: 10.4236/ajps.2016.71024
Abstract: Rising global CO2 levels are a major factor that impacts not only the environment but also many plant functions including growth, productivity and nutritional quality. The study examined the impact of elevated [CO2] on nutritional quality and growth characteristics of lettuce (Lactuca sativa) and spinach (Spinacia oleracea). Elevated [CO2] decreased the concentration of many important nutrients including nitrogen (protein), potassium and phosphorus in the edible parts of both lettuce and spinach. The nitrogen concentration in lettuce shoots was reduced by more than 30% at elevated [CO2] compared to the plants grown at ambient level of CO2. Similarly the concentration of a number of micronutrients including sulfur, zinc, copper and magnesium, was depressed in lettuce shoots. Although the total phenolic content and antioxidant capacity were higher in lettuce at elevated CO2, they were not affected in spinach. The photosynthetic activity was variable among the plant species while there was no increase in the carbon accumulation in these plants at elevated [CO2]. However, there was significant reduction in the leaf stomatal conductance in both lettuce and spinach in response to higher [CO2], which is likely affect both water loss from the leaves and their photosynthetic activity. The results indicate a broad adverse impact of rising [CO2] on the nutritional quality of commonly consumed leafy vegetables namely, lettuce and spinach.
Effect of Ca doping for Y on structural / microstructural and superconducting properties of YBa2Cu 3O7-d
Rajiv Giri,H. K. Singh,O. N. Srivastava,V. P. S. Awana,Anurag Gupta,B. V. Kumaraswamy,H. Kishan
Physics , 2004, DOI: 10.1016/j.physc.2005.01.002
Abstract: We report systematic studies of structural, microstructural and transport properties of Y1-xCaxBa2Cu3O7-d bulk samples with 0.20 x 0.0. The partial substitution of Ca2+ at Y3+ site in YBa2Cu3O7-d leads towards slightly overdoped regime, which along with disorder in CuO2 planes is responsible for decrease in superconducting transition temperature (Tc) of the doped system. The microstructural variants being studied by transmission electron microscopy (TEM) technique in imaging and selected area diffraction modes revealed an increase in the density of twins with increase in Ca concentration despite the fact that there is slight decrease in the orthorhombicity. This is against the general conviction of decrease in twin density with decreasing orthorhombicity. An increase in twin density results in sharpening of twin boundaries with increasing Ca concentration. These sharpened twin boundaries may work as effective pinning centers. A possible correlation between microstructural features and superconducting properties has been put forward and discussed in the present investigation.
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