R Chakraborty
Biographic Data
| ID | 51879 |
|---|---|
| NAME | R Chakraborty |
| GIVEN NAMES | R |
| FAMILY NAME | Chakraborty |
| SIGNATURE | CHAKRABORTY R |
| AFFILIATIONS | The University of Texas Health Science Center at Houston |
| ORCID | 0000-0002-9060-9471 |
| VERIFIED | Yes |
| TOTAL WORKS | 20 |
| TOTAL CITATIONS | 2 |
| AUTHOR COUNT | 20 |
| EDITOR COUNT | 0 |
| FIRST PUBLICATION YEAR | 1981 |
| LATEST PUBLICATION YEAR | 2026 |
| H-INDEX | 1 |
Absence of Sex Difference in Digit Ratio ( 2D: (4D ) Among the Elite Sportspersons: Further Evidence Among the Polish Swimmers
The swimmers had lower 2D:4D than non-sporting individuals; the top level swimmers had the lowest 2D:4D. The female swimmers, particularly the elite group, showed "masculine" 2D:4D similar to their male counterparts. A plausible positive selection for a masculinised digit ratio (higher prenatal testosterone exposure) among the females in highly competitive professional sports was hypothesized
Collaborative Filtering In Recommender Systems: A Comparative Evaluation
Recommender systems have become a core component of digital platforms, enabling personalized content delivery and enhancing user engagement across industries such as e-commerce, entertainment, and social networking. This study presents a comparative evaluation of collaborative filtering (CF) algorithms, including User-Based CF, Item-Based CF, Singular Value Decomposition (SVD), Non-negative Matrix Factorization (NMF), and a Hybrid CF model that i…
Age at Menarche Is Associated With Leg‐Length Components Among the Adolescent Girls in West Bengal, India
BACKGROUND: The relationship between early age at menarche (AAM) and body height (HT), including its different segments has not been extensively studied among non Western populations. Lengths of the lower (distal) part of the leg, such as knee HT (KH) and tibial length (TbL), are considered to be sensitive indicators of living conditions during early growth and development. Life history theory predicts that within a survival challenge the growth …
The change in handgrip strength, after physical exercise, is moderated by digit ratio ( 2D: (4D ): A study among the young adults in Poland
Factors influencing parents’ hesitancy to vaccinate their children aged 5–11 years old against Covid-19: Results from a cross-sectional study in Malaysia
Introduction Vaccination programs have been rolled out across the globe to contain and mitigate the spread of the COVID-19 infection. Until recently, such programs were limited to adults and the older population, thereby limiting children from getting vaccinated. Recently, the Malaysian government rolled out vaccination for children aged 5–11 years. However, there are certain factors that might affect vaccination uptake among children. This study…
Is 2D: 4D digit ratio related to avowed religion? A study among Mongolian young males from Ulaanbaatar
BACKGROUND: The ratio of the second- (2D) to fourth (4D) digit lengths of hand (2D:4D) is a proxy marker of the relative testosterone and estrogen concentration during a relatively narrow period of fetal development that might affect behavioral and personality characteristics. AIM: To estimate the differences in 2D:4D between different religious groups among a sample of young adult males in Mongolia. METHODS: Two hundred and sixty-five Mongolian …
Relative Body Fat Distribution in Preadolescent Indian Children Exposed to a Natural Disaster during Early Development
Fetal life and infancy are critical periods when adverse environmental conditions, such as natural disasters, may alter a developing organism, leading to life-lasting unfavorable health outcomes, such as central body fat distribution. Therefore, the aim of this study was to assess the effect of the exposure to cyclone Aila in utero or during infancy on the relative subcutaneous adiposity distribution in preadolescent Indian children. The study in…
Ethics, zoonoses, and human-nonhuman conflict: Covid-19 and beyond
While the causes of human-animal conflict are numerous, many are intertwined with food production systems and the wildlife trade. The emergence and spread of Covid-19 exemplify this. Indeed, the wildlife population in South Asian countries has seen an increase in the risk of both human and nonhuman death in recent months, and as the economy slows, the search for food and extra income will intensify, negatively impacting wildlife. This paper aims …
Mother’s education level is associated with anthropometric failure among 3- to 12-year-old rural children in Purba Medinipur, West Bengal, India
Maternal education plays a central role in children’s health and nutrition. Living conditions and socioeconomic status are linked with mother’s education, which in turn determines the health and development of a child. The Composite Index of Anthropometric Failure (CIAF) is a single indicator that reflects overall rate of three conventional indices of undernutrition: underweight, stunting and wasting. The study was undertaken among 621 rural Beng…
Validating mid-upper arm circumference (Muac) cut off points as an indicator of nutritional status among nine tribal populations of India
Mid-upper arm circumference (MUAC) is an alternative anthropometric measurement to assess undernutrition but a universally accepted cut-off is yet to be established. The objectives of the present study are to determine whether the proposed sex-specific global cut-offs are suitable across several tribes in India. This cross-sectional study was conducted among nine tribal populations in India (1046 males, 1087 females). Weight, height and MUAC valu…
Nutritional and weight status of Indian mother‐child dyads experienced by a natural disaster
Natural disasters have detrimental effects not only on local infrastructure in an affected population but may also have an impact on the human biological condition, particularly during critical periods of life. This study aimed to assess the nutritional and weight status of women and their children who had experienced cyclone Aila prenatally and postnatally in comparison with a non-affected neighbouring group. The study sample involved N = 597 dy…
Relationship between temperament and fatness in 11-year-old children and 17-year-old adolescents from Wrocław, Poland
Waist circumference in determining obesity and hypertension among 18–60 years old Bengalee Hindu male slum dwellers in Eastern India
WC value of ~80 cm could efficiently discriminate both obesity and hypertension among the Bengalee Hindu slum dwelling men aged between 18-60 years. Central obesity, determined by WC ≥ 80 cm, was associated with increased blood pressure and higher risk of HT, independent of age and general obesity
Body Mass Index and Chronic Energy Deficiency Among Urban Bengalee Male Slum Dwellers of Kolkata, India: Relationship with Family Income
A cross-sectional study of 191 adult (>18 years) Bengalee male slum dwellers of Kolkata, India, was undertaken to study the relationships of family income with body mass index (BMI) and chronic energy deficiency (CED). Results revealed that the mean height, weight, and BMI of the subjects were 162.2 cm, 54.0 kg, and 20.5 kg/m2, respectively. The overall frequency of CED (BMI < 18.5 kg/m2) was 33.5%. Based on the World Health Organization classifi…
D1S80 Population Data in African Americans, Caucasians, Southeastern Hispanics, Southwestern Hispanics, and Orientals
Allele frequencies for the locus D1S80 were determined in African American, Caucasian, Southeastern Hispanic, Southwestern Hispanic, and Oriental sample populations using the polymerase chain reaction and subsequent electrophoresis and silver staining of the amplified products. Due to the presence of anodal and cathodal electrophoretic variants (in reference to the steps in an allelic ladder), allele frequencies were established using a classific…
Genetic profile of cosmopolitan populations: Effects of hidden subdivision
Natural populations of many organisms exhibit excess of rare alleles in comparison with the predictions of the neutral mutation hypothesis. It has been shown before that either a population bottleneck or the presence of slightly deleterious mutations can explain this phenomenon. A third explanation is presented in this work, showing that hidden subdivision within a population can also lead to an excess of rare alleles in the total population when…
Genetic studies among the Siddis of Karnataka, India: A migrant population from Africa
18 polymorphic systems of the blood ? A1A2BO, MNSs, Rhesus (C,c,D,E,e), Duffy, Diego; Haptoglobin (Hp), Ceruloplasmin (Cp), Transferrin subtypes (Tf), Gc subtypes (Gc), Gm (1,2,5), Km (1); red cell acid phosphatase (aP), phosphoglucomutase subtypes (PGMi), adenylate ki nase (AK), adenosine deaminase (ADA), esterase D (EsD), lactate dehydrogenase (LDH), and hae moglobin variants were typed on 237 Siddis from Karnataka (South India), a Negroid popu…
Immunoglobulin (Gm and Km) allotypes in nine endogamous groups of West Bengal, India
Blood samples from 898 individuals of nine endogamous groups of West Bengal, India were typed for determining the haplotypic structure in the gamma-light chain (Gm) and kappa-light chain (Km) of immunoglobulin (IgG). The Gm haplotype frequencies detected by Glm (1), Glm (2) and G3m (5) markers suggest that in this eastern state of India there is considerable variation of frequencies of the typical Mongoloid haplotype Gm1,5, which shows a high inc…
Estimation of mutation rates from the number of rare alleles in a sample
To estimate the mutation rate from rare electrophoretic variants, a revised estimating equation is derived that takes into account the sampling distribution of the observed number of rare alleles in a sample drawn from the population. A check of the approximations used here suggests that the derived estimating equation is superior to the currently available one that is based on the expected number of rare alleles in the population. The new method…
Distribution of the number of heterozygous loci in the Kota population of Nilgiri hills of India and estimation of average heterozygosity
From an electrophoretic survey of 17 protein enzyme loci in seven Kota villages of the Nilgiri Hills, Madras region of South India, the distribution of the number of heterozygous loci is computed. It is demonstrated that the mean of this distribution provides an alternative estimate of the average heterozygosity in an individual per locus which does not make use of the assumptions of linkage equilibrium and random mating. Since the Kotas practise…
Genetic profile of cosmopolitan populations: Effects of hidden subdivision
Natural populations of many organisms exhibit excess of rare alleles in comparison with the predictions of the neutral mutation hypothesis. It has been shown before that either a population bottleneck or the presence of slightly deleterious mutations can explain this phenomenon. A third explanation is presented in this work, showing that hidden subdivision within a population can also lead to an excess of rare alleles in the total population when…
Estimation of mutation rates from the number of rare alleles in a sample
To estimate the mutation rate from rare electrophoretic variants, a revised estimating equation is derived that takes into account the sampling distribution of the observed number of rare alleles in a sample drawn from the population. A check of the approximations used here suggests that the derived estimating equation is superior to the currently available one that is based on the expected number of rare alleles in the population. The new method…
Distribution of the number of heterozygous loci in the Kota population of Nilgiri hills of India and estimation of average heterozygosity
From an electrophoretic survey of 17 protein enzyme loci in seven Kota villages of the Nilgiri Hills, Madras region of South India, the distribution of the number of heterozygous loci is computed. It is demonstrated that the mean of this distribution provides an alternative estimate of the average heterozygosity in an individual per locus which does not make use of the assumptions of linkage equilibrium and random mating. Since the Kotas practise…
Immunoglobulin (Gm and Km) allotypes in nine endogamous groups of West Bengal, India
Blood samples from 898 individuals of nine endogamous groups of West Bengal, India were typed for determining the haplotypic structure in the gamma-light chain (Gm) and kappa-light chain (Km) of immunoglobulin (IgG). The Gm haplotype frequencies detected by Glm (1), Glm (2) and G3m (5) markers suggest that in this eastern state of India there is considerable variation of frequencies of the typical Mongoloid haplotype Gm1,5, which shows a high inc…
Genetic studies among the Siddis of Karnataka, India: A migrant population from Africa
18 polymorphic systems of the blood ? A1A2BO, MNSs, Rhesus (C,c,D,E,e), Duffy, Diego; Haptoglobin (Hp), Ceruloplasmin (Cp), Transferrin subtypes (Tf), Gc subtypes (Gc), Gm (1,2,5), Km (1); red cell acid phosphatase (aP), phosphoglucomutase subtypes (PGMi), adenylate ki nase (AK), adenosine deaminase (ADA), esterase D (EsD), lactate dehydrogenase (LDH), and hae moglobin variants were typed on 237 Siddis from Karnataka (South India), a Negroid popu…
Genetic profile of cosmopolitan populations: Effects of hidden subdivision
Natural populations of many organisms exhibit excess of rare alleles in comparison with the predictions of the neutral mutation hypothesis. It has been shown before that either a population bottleneck or the presence of slightly deleterious mutations can explain this phenomenon. A third explanation is presented in this work, showing that hidden subdivision within a population can also lead to an excess of rare alleles in the total population when…
D1S80 Population Data in African Americans, Caucasians, Southeastern Hispanics, Southwestern Hispanics, and Orientals
Allele frequencies for the locus D1S80 were determined in African American, Caucasian, Southeastern Hispanic, Southwestern Hispanic, and Oriental sample populations using the polymerase chain reaction and subsequent electrophoresis and silver staining of the amplified products. Due to the presence of anodal and cathodal electrophoretic variants (in reference to the steps in an allelic ladder), allele frequencies were established using a classific…
Body Mass Index and Chronic Energy Deficiency Among Urban Bengalee Male Slum Dwellers of Kolkata, India: Relationship with Family Income
A cross-sectional study of 191 adult (>18 years) Bengalee male slum dwellers of Kolkata, India, was undertaken to study the relationships of family income with body mass index (BMI) and chronic energy deficiency (CED). Results revealed that the mean height, weight, and BMI of the subjects were 162.2 cm, 54.0 kg, and 20.5 kg/m2, respectively. The overall frequency of CED (BMI < 18.5 kg/m2) was 33.5%. Based on the World Health Organization classifi…
Waist circumference in determining obesity and hypertension among 18–60 years old Bengalee Hindu male slum dwellers in Eastern India
WC value of ~80 cm could efficiently discriminate both obesity and hypertension among the Bengalee Hindu slum dwelling men aged between 18-60 years. Central obesity, determined by WC ≥ 80 cm, was associated with increased blood pressure and higher risk of HT, independent of age and general obesity
Relationship between temperament and fatness in 11-year-old children and 17-year-old adolescents from Wrocław, Poland
Mother’s education level is associated with anthropometric failure among 3- to 12-year-old rural children in Purba Medinipur, West Bengal, India
Maternal education plays a central role in children’s health and nutrition. Living conditions and socioeconomic status are linked with mother’s education, which in turn determines the health and development of a child. The Composite Index of Anthropometric Failure (CIAF) is a single indicator that reflects overall rate of three conventional indices of undernutrition: underweight, stunting and wasting. The study was undertaken among 621 rural Beng…
Validating mid-upper arm circumference (Muac) cut off points as an indicator of nutritional status among nine tribal populations of India
Mid-upper arm circumference (MUAC) is an alternative anthropometric measurement to assess undernutrition but a universally accepted cut-off is yet to be established. The objectives of the present study are to determine whether the proposed sex-specific global cut-offs are suitable across several tribes in India. This cross-sectional study was conducted among nine tribal populations in India (1046 males, 1087 females). Weight, height and MUAC valu…
Nutritional and weight status of Indian mother‐child dyads experienced by a natural disaster
Natural disasters have detrimental effects not only on local infrastructure in an affected population but may also have an impact on the human biological condition, particularly during critical periods of life. This study aimed to assess the nutritional and weight status of women and their children who had experienced cyclone Aila prenatally and postnatally in comparison with a non-affected neighbouring group. The study sample involved N = 597 dy…
Relative Body Fat Distribution in Preadolescent Indian Children Exposed to a Natural Disaster during Early Development
Fetal life and infancy are critical periods when adverse environmental conditions, such as natural disasters, may alter a developing organism, leading to life-lasting unfavorable health outcomes, such as central body fat distribution. Therefore, the aim of this study was to assess the effect of the exposure to cyclone Aila in utero or during infancy on the relative subcutaneous adiposity distribution in preadolescent Indian children. The study in…
Ethics, zoonoses, and human-nonhuman conflict: Covid-19 and beyond
While the causes of human-animal conflict are numerous, many are intertwined with food production systems and the wildlife trade. The emergence and spread of Covid-19 exemplify this. Indeed, the wildlife population in South Asian countries has seen an increase in the risk of both human and nonhuman death in recent months, and as the economy slows, the search for food and extra income will intensify, negatively impacting wildlife. This paper aims …
Factors influencing parents’ hesitancy to vaccinate their children aged 5–11 years old against Covid-19: Results from a cross-sectional study in Malaysia
Introduction Vaccination programs have been rolled out across the globe to contain and mitigate the spread of the COVID-19 infection. Until recently, such programs were limited to adults and the older population, thereby limiting children from getting vaccinated. Recently, the Malaysian government rolled out vaccination for children aged 5–11 years. However, there are certain factors that might affect vaccination uptake among children. This study…
Is 2D: 4D digit ratio related to avowed religion? A study among Mongolian young males from Ulaanbaatar
BACKGROUND: The ratio of the second- (2D) to fourth (4D) digit lengths of hand (2D:4D) is a proxy marker of the relative testosterone and estrogen concentration during a relatively narrow period of fetal development that might affect behavioral and personality characteristics. AIM: To estimate the differences in 2D:4D between different religious groups among a sample of young adult males in Mongolia. METHODS: Two hundred and sixty-five Mongolian …
The change in handgrip strength, after physical exercise, is moderated by digit ratio ( 2D: (4D ): A study among the young adults in Poland
Collaborative Filtering In Recommender Systems: A Comparative Evaluation
Recommender systems have become a core component of digital platforms, enabling personalized content delivery and enhancing user engagement across industries such as e-commerce, entertainment, and social networking. This study presents a comparative evaluation of collaborative filtering (CF) algorithms, including User-Based CF, Item-Based CF, Singular Value Decomposition (SVD), Non-negative Matrix Factorization (NMF), and a Hybrid CF model that i…
Age at Menarche Is Associated With Leg‐Length Components Among the Adolescent Girls in West Bengal, India
BACKGROUND: The relationship between early age at menarche (AAM) and body height (HT), including its different segments has not been extensively studied among non Western populations. Lengths of the lower (distal) part of the leg, such as knee HT (KH) and tibial length (TbL), are considered to be sensitive indicators of living conditions during early growth and development. Life history theory predicts that within a survival challenge the growth …
Absence of Sex Difference in Digit Ratio ( 2D: (4D ) Among the Elite Sportspersons: Further Evidence Among the Polish Swimmers
The swimmers had lower 2D:4D than non-sporting individuals; the top level swimmers had the lowest 2D:4D. The female swimmers, particularly the elite group, showed "masculine" 2D:4D similar to their male counterparts. A plausible positive selection for a masculinised digit ratio (higher prenatal testosterone exposure) among the females in highly competitive professional sports was hypothesized
Demography (18 works) · Medicine (13 works) · Population (11 works) · Demography (8 works) · Sociology (7 works) · Biology (6 works) · Environmental health (6 works) · Geography (6 works) · Internal Medicine (6 works) · Anthropometry (5 works)