Classification of yarn interlacement pattern in fabrics using least square support vector machines     

Anindya Ghosh  Tarit Guha  R. B. Bhar 《Fibers and Polymers》2013,14(7):1215-1219

The purpose of this paper is to suggest an effective and reliable tool that can read through fabric images in the quest of deciphering yarn interlacement patterns by means of Least-Square Support Vector Machines (LS-SVM). A LS-SVM based binary pattern recognition system is formulated for identifying two modes of yarn interlacements viz., warp over weft or warp under weft and accuracy of the classifier was assessed by k-fold cross validation techniques. A comparative study establishes that LS-SVM shows better result than the standard SVM while classifying yarn interlacement patterns in fabrics. The proposed method has the potential to classify yarn interlacement patterns with possibility of extending it to designdecoding of diverse fabrics.  相似文献   

Effect of nitrogen nutrition of stock plants of Justicia gendarussa L. on the rooting of cuttings     

R.N. Basu  S.K. Ghosh 《The Journal of Horticultural Science and Biotechnology》2013,88(3):245-252

The effect of the nitrogen nutrition of stock plants of Justicia gendarussa L. on the rooting of cuttings was studied in sand culture under high, medium and low levels of nitrogen.

Nitrogen starvation induced rooting. Exogenous application of the auxins IAA (indol-3yl-acetic acid), IBA (indol-3yl-butyric acid) and NAA (naphth-lyl-acetic acid) greatly increased the rooting response of cuttings from-stock plants grown with small amounts of nitrogen.

The root-promoting effect of a low nitrogen supply was associated with a retardation of growth in the stock plants from which the cuttings were made. High C/N (total available carbohydrates/total nitrogen) and P/N (total phosphorus/total nitrogen) ratios increased anthocyanin pigmentation in the shoot, and increased rooting cofactor activity in the tissues of cuttings. The phenolic compounds, ferulic acid, p-hydroxybenzoic acid and p-coumaric acid were present in the shoots of all three nutritional treatments and acted as important cofactors in the cuttings. In general, rooting cofactor activity was inversely related to nitrogen supply and the activity was highest under low nitrogen.

The cuttings taken from plants grown under different levels of nitrogen interacted differentially with the exogenously applied auxins.  相似文献   

Sequence and evolutionary analysis of ribosomal DNA from Huanglongbing (HLB) isolates of Western India     

Dilip Ghosh  Sumit Bhose  Krishanu Mukherjee  V. K. Baranwal 《Phytoparasitica》2013,41(3):295-305

Citrus greening (Huanglongbing, HLB) is a widespread and economically important citrus disease all over the world. The disease is caused by a phloem-limited fastidious gram negative bacterium, “Candidatus Liberibacter spp.” which belongs to the alpha-proteobacteria group classified on the basis of its 16SrDNA sequence. Although the pathogen has been classified under three distinct groups, viz. Asian, African and American isolates, nothing is known about the status and the molecular variabilities among the Indian HLB isolates collected from different citrus cultivars grown in India. Five different HLB isolates showing variable symptoms based on their severity of infection on different citrus, viz. Mosambi, Rangpur lime, Cleopatra mandarin, acid lime and rough lemon, were studied by PCR amplification, sequence and evolutionary analysis of their 16S and 16S/23S rDNA intergenic regions. Analysis of the 16S/23S rDNA intergenic region separated all five Indian isolates from existing African isolates but failed to differentiate among Asian, American and Indian isolates. However, further analysis of complete 16S rDNA clearly indicated that Indian isolates fall within the Asian HLB group. Overall, our results suggest that all the five Indian HLB isolates taken for the current analysis belong to the Candidatus Liberibacter asiaticus strain, which showed distinct sequence variabilities and produced noticeable symptoms on the citrus trees. These results provide a robust framework for understanding how differences in pathogenicity among various HLB isolates may be related to evolutionary history.  相似文献   

Inference for Size Demography From Point Pattern Data Using Integral Projection Models     

Souparno Ghosh  Alan E. Gelfand  James S. Clark 《Journal of Agricultural, Biological & Environmental Statistics》2012,17(4):641-677

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Feed Formulation Using Linear Programming for Fry of Catfish,Milkfish, Tilapia,Asian Sea Bass,and Grouper in India     

D. Ghosh  P. Vijayagopal 《Journal Of Applied Aquaculture》2013,25(1):85-101

Nutritional profiles of 25 feed ingredients available in India were selected and compiled. Their costs were ascertained from Cochin (SW), Tuticorin (SE), and Bhubaneswar (NW), where fish/shrimp farming is traditionally practiced. Least-cost feed formulations (using the linprog toolbox in Matlab software) were attempted for catfish, milkfish, tilapia, and grouper fry specifying levels of four critical limits: Ca/P ratio, digestible energy (DE), 10 amino acid levels (where data was available), and 10 ingredients, totaling 26 constraining limits to the model. Feeds formulated for catfish fry cost US$0.066 kg^?1 at Bhubaneswar, US$0.117 kg^?1 at Tuticorin, and US$0.153 kg^?1 at Cochin, with poultry by-product meal and hydrolyzed feather meal as the major ingredients; limiting amino acids in these feeds were methionine and phenylalanine. Feeds formulated for milkfish fry cost US$0.110 kg^?1 at Cochin, US$0.108 kg^?1 at Tuticorin, and US$0.072 kg^?1 at Bhubaneswar; the limiting amino acids in this case were histidine and threonine. The cost of feeds for tilapia fry was US$0.207 kg^?1 at Cochin, US$0.369 kg^?1 at Tuticorin, and US$ 0.114 kg^?1 at Bhubaneswar; the limiting amino acid was methionine. Feed formulae for fry of Asian sea bass had an LP solution containing only five ingredients for all three places. The feed formula was the same for Cochin and Bhubaneswar market prices, and the total cost of ingredients was US$0.274 kg^?1 and US$0.142 kg^?1, respectively. At Tuticorin market prices, the feed formula cost was US$0.397 kg^?1. The feed formulae for grouper fry at Bhubaneswar and Tuticorin market prices had the same three ingredients costing US$0.114 kg^?1 and US$0.321 kg^?1, respectively, whereas feed formula for Cochin market price consisted of four ingredients costing US$0.280 kg^?1.  相似文献   

Enzyme‐producing bacteria isolated from fish gut: a review     

A.K. Ray  K. Ghosh  E. Ringø 《Aquaculture Nutrition》2012,18(5):465-492

Digestion of food depends on three main factors: (i) the ingested food and the extent to which the food is susceptible to the effects of digestive enzymes, (ii) the activity of the digestive enzymes and (iii) the length of time the food is exposed to the action of the digestive enzymes. Each of these factors is affected by a multitude of secondary factors. The present review highlights the experimental results on the secondary factor, enzymatic activity and possible contribution of the fish gut microbiota in nutrition. It has been suggested that fish gut microbiota might have positive effects to the digestive processes of fish, and these studies have isolated and identified the enzyme‐producing microbiota. In addition to Bacillus genera, Enterobacteriaceae and Acinetobacter, Aeromonas, Flavobacterium, Photobacterium, Pseudomonas, Vibrio, Microbacterium, Micrococcus, Staphylococcus, unidentified anaerobes and yeast are also suggested to be possible contributors. However, in contrast to endothermic animals, it is difficult to conclude the exact contribution of the gastrointestinal microbiota because of the complexity and variable ecology of the digestive tract of different fish species, the presence of stomach and pyloric caeca and the relative intestinal length. The present review will critically evaluate the results to establish whether or not intestinal microbiota do contribute to fish nutrition.  相似文献   

Host and virus effects on reversion in cassava affected by cassava brown streak disease          下载免费PDF全文

I. U. Mohammed  S. Ghosh  M. N. Maruthi 《Plant pathology》2016,65(4):593-600

The phenomenon of virus‐infected plants naturally recovering health is known as ‘reversion’, and is a type of resistance mechanism exploited in some crop plants for disease control. Various parameters were investigated that affect reversion from cassava brown streak disease (CBSD) in three cassava varieties (Albert, Kaleso and Kiroba) that differ in levels of resistance to the disease. Cassava plants were inoculated by grafting with two virus species (Ugandan cassava brown streak virus, UCBSV and Cassava brown streak virus, CBSV) that cause CBSD, and the plants grown from them were subsequently assessed for reversion. The rate of reversion depended on the cassava variety, virus species, and the length and position of the stem cuttings used. A significantly high proportion of progenies were virus‐free (reverted) for the resistant variety Kaleso (64·1% for UCBSV and 54·9% of CBSV), compared to the tolerant variety Kiroba (56·7 and 45·5%) and the susceptible control Albert (38·9 and 35·1%). The highest number of virus‐free plants was generated from short 10 cm long cuttings (e.g. 60·1% for Kaleso for CBSV) compared to 20 cm long stem cuttings (e.g. 21·4% for Albert). Cuttings taken from upper stems of diseased plants produced most virus‐free progenies compared to middle and lower parts. More than 50% virus‐free plants were obtained in the resistant and tolerant varieties. This is a highly valuable finding and could be exploited for developing strategies to control the current CBSD epidemic in eastern and central Africa.  相似文献   

Present status of Citrus tristeza virus infecting Citrus spp. in Darjeeling hills and its detection in different plant parts     

Amalendu Ghosh  Amrita Das  K. B. Pun  R. Kumar  Ramu Meena  V. K. Baranwal 《Phytoparasitica》2014,42(3):381-386

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Resistance of Scots pine (Pinus sylvestris L.) wood modified with functionalized commercial silicone emulsions against subterranean termites     

Shyamal C. Ghosh  Brenton C. Peters  Chris J. Fitzgerald  Holger Militz  Carsten Mai 《Wood Science and Technology》2012,46(6):1033-1041

Scots pine (Pinus sylvestris L.) sapwood was treated with quat-silicone micro-emulsion (<40?nm), amino-silicone macro-emulsion (110?nm), alkyl-modified silicone macro-emulsion (740?nm) and solutions of inorganic water glass. Three treatment concentrations of 5, 15 and 30% (w/w) were used for the impregnation of the test specimens. Termite resistance was assessed following a 16-week field trial conducted in northern Queensland, Australia. Two different field sites were chosen for exposure to feeding by Coptotermes acinaciformis (Froggatt) and Mastotermes darwiniensis (Froggatt). Following exposure, the test and feeder specimens were inspected and assessed for termite damage using a visual rating system (from 10 sound to 0 completely destroyed) and individual mass losses. The specimens treated with quat- and amino-silicone emulsions resisted damage by both termite species, even at less than 15% weight percent gains (WPGs). Alkyl-modified silicone macro-emulsion and water glass treatment induced somewhat less resistance to termite damage, but imparted protection at higher WPGs.  相似文献   

Maternal influence on diapause induction: an approach to improve long-term storage of <Emphasis Type="Italic">Trichogramma chilonis</Emphasis>     

Enakshi Ghosh  Chandish R. Ballal 《Phytoparasitica》2018,46(3):383-389

We have investigated the role of the thermo-photoperiodic condition of maternal generation in diapause induction of Trichogramma chilonis (Ishii) (Hymenoptera: Trichogrammatidae) lab strain. To test the maternal effect, two lines of T. chilonis lab strain were generated by rearing them for one generation at: (1) 15 °C with L:D-12:12 (¹⁵F-1₁₂) and (2) 15 °C with L:D-20:4 (¹⁵F-1₂₀). The laboratory strain reared at 15 °C with L:D-12:12 for 65 generations (¹⁵F-65₁₂) was used as the control (acclimatized strain) due to its proven diapausing capacity. The ¹⁵F-1₂₀ line failed to undergo diapause, though healthy pre-pupae were formed at the pre-storage condition (at 10 °C with L:D- 8:16 and RH-60-70%). However, ¹⁵F-1₁₂ line could successfully complete all the phases of diapause and was comparable with the control batch. Considering 50% adult emergence and minimum 3 days of longevity, 125 days of storage could be achieved. From our current study, we conclude that diapause can be induced in T. chilonis lab strain by providing appropriate thermo-photoperiod to their maternal generation (for a single generation) followed by suitable diapause inducing and terminating protocols.  相似文献