A Study on the Impact of Locality in the Decoding of Binary Cyclic Codes

In this paper, we study the impact of locality on the decoding of binary cyclic codes under two approaches, namely ordered statistics decoding (OSD) and trellis decoding. Given a binary cyclic code having locality or availability, we suitably modify the OSD to obtain gains in terms of the Signal-To-Noise ratio, for a given reliability and essentially the same level of decoder complexity. With regard to trellis decoding, we show that careful introduction of locality results in the creation of cyclic subcodes having lower maximum state complexity. We also present a simple upper-bounding technique on the state complexity profile, based on the zeros of the code. Finally, it is shown how the decoding speed can be significantly increased in the presence of locality, in the moderate-to-high SNR regime, by making use of a quick-look decoder that often returns the ML codeword.Comment: Extended version of a paper submitted to ISIT 201

Recovery of gold from Plant/dump Liquors, Gadag Gold Fields, Karnataka, India

The tailings disposal fronr the gold concentrators to the tailing dants containss about 70% solids and 30% water or liquor: After discharging the solids the liquor portion of pulp is reclaimed to the extent maximum 50%. Recoverv is tested throughout the year and it is,found that recovery varies seasonally, affecting the grade of the reclaimed solution. The reclaimed liquor from the tailing dams and the plant waste waters are passed through settler- tanks or thickener. The clear liquor is passed through the activa-ted carbon columns (C-I-S). The gold content of the liquor is adsorbed on to the carbon, the tail liquor is reused in theprocess. The gold loaded carbon is eluted and continuou-sly electrowon, with the help of continuous re-circulation of hot caustic cyanide solution at +93'C. The gold loaded cathodes are acid treated, smelted with fluxes to produce gold bullion. The carbon from the elution system is reused in the process after thermal regeneration

Influence of maternal and child factors on the dental service utilization among preschool children in Bangalore urban district: a cross-sectional study

Background: Dental visit is considered primary marker of oral care. Maternal characteristics, attitudes and psychosocial factors and the child’s oral health may influence dental visits of preschool children. This study aimed to determine the influence of maternal and child factors on dental services utilization among preschool children. Methods: A cross-sectional study was conducted among 600 preschool children and mothers visiting Anganwadis and Primary Health Centres in Bangalore Urban District. Mothers answered questions on socio-demographic characteristics and dental attendance. Maternal dental anxiety and child’s oral health-related quality of life were assessed using modified dental anxiety scale and early childhood oral health impact scale respectively. Oral health of children and mothers were assessed using WHO oral health assessment form 2013 for children and adults respectively. Descriptive statistics, Poisson’s regression with robust variance and mediation analysis were performed and p<0.05 was considered significant. Results: The proportion of dental visit among preschool children was 13.5%. Majority of the mothers had high dental anxiety (76.2%) and perceived their children’s oral health-related quality of life to be good (71.2%). The caries experience in mothers and children were 63.5% and 54.2% respectively. Mothers with higher education (PR=2.05, p=0.037), caries experience (PR=3.17, p<0.001) and poor perception of child’s oral health-related quality of life (PR=5.88, p<0.001), and children with pain experience (PR=1.62, p=0.003) and decayed teeth (PR=1.81, p=0.017) influenced children’s dental visit. Maternal perception on child’s oral health-related quality of life mediates the relationship between child’s oral health and dental visit. Conclusions: The utilization of dental services among preschool children was low. Maternal and child oral health factors influenced the child’s dental service utilization. Hence, oral health promotion approaches towards mothers and children is the need for the hour

Association of periodontal health with physical and emotional well-being among pre and postmenopausal women in Bangalore: a cross sectional study

Background: Menopausal transition is frequently accompanied by physical, emotional as well as periodontal health changes in pre and postmenopausal women due to the decline in circulating blood oestrogen levels. Aim was to investigate the association of periodontal health with physical and emotional well-being among pre and postmenopausal women aged 35-65 years. Methods: A cross sectional study was conducted among 150 pre and 150 postmenopausal women in Bangalore urban district Women Health Questionnaire was used to assess physical and emotional well-being. WHO Oral Health Assessment form for adults 2013 along with plaque and gingival indexes were used to assess the periodontal health status. Descriptive, bivariate, multiple linear regression analysis were carried out. A p<0.05 was considered statistically significant. Results: The mean age among pre and postmenopausal women were 40.09±2.24 years and 55.42±5.7 (p<0.001). The mean scores of depression/anxiety mood; somatic symptoms; memory/concentration; vasomotor symptoms; sleep problem was significantly higher in postmenopausal compared to premenopausal group (p<0.001). The mean number of teeth with gingival bleeding (12.93±8.0 and 6.94±5.68); deep periodontal pocket (2.05±1.61 and 0.44±0.97) were higher in postmenopausal group in comparison to the other group respectively (p<0.001). Depression was significantly associated with periodontal health of women in both the groups. Conclusions: Women after menopause experienced more physical and emotional changes. Periodontal health status was found to be poor among postmenopausal women compared to premenopausal women