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  1. AU="Kumar, B Siva"
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  1. Artikel: A novel sampling-based visual topic models with computational intelligence for big social health data clustering.

    Narasimhulu, K / Abarna, K T Meena / Kumar, B Siva / Suresh, T

    The Journal of supercomputing

    2022  Band 78, Heft 7, Seite(n) 9619–9641

    Abstract: Twitter is a popular social network for people to share views or opinions on various topics. Many people search for health topics through Twitter; thus, obtaining a vast amount of social health data from Twitter is possible. Topic models are widely used ... ...

    Abstract Twitter is a popular social network for people to share views or opinions on various topics. Many people search for health topics through Twitter; thus, obtaining a vast amount of social health data from Twitter is possible. Topic models are widely used for social health-care data clustering. These models require prior knowledge about the clustering tendency. Determining the number of clusters of given social health data is known as the health cluster tendency. Visual techniques, including visual assessment of the cluster tendency, cosine-based, and multiviewpoint-based cosine similarity features VAT (MVCS-VAT), are used to identify social health cluster tendencies. The recent MVCS-VAT technique is superior to others; however, it is the most expensive technique for big social health data cluster assessment. Thus, this paper aims to enhance the work of the MVCS-VAT using a sampling technique to address the big social health data assessment problem. Experimental is conducted on different health datasets for demonstrating an efficiency of proposed work. Accuracy of social health data clustering is improved at a rate of 5 to 10% in the proposed S-MVCS-VAT when compared to MVCS-VAT. From obtained results, it also proved that the proposed S-MVCS-VAT is a faster and memory efficient for discovering social health data clusters.
    Sprache Englisch
    Erscheinungsdatum 2022-01-19
    Erscheinungsland United States
    Dokumenttyp Journal Article
    ZDB-ID 1479917-0
    ISSN 1573-0484 ; 0920-8542
    ISSN (online) 1573-0484
    ISSN 0920-8542
    DOI 10.1007/s11227-021-04300-7
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  2. Artikel: Conduction Blocks in Medically Managed Patients with Acute ST Elevated Myocardial Infarction during Index Hospital Admission: An Observational Study.

    Kumar, B Siva / Latha Devi, G Swarna / Rao, K V Chalapathi

    The Journal of the Association of Physicians of India

    2020  Band 68, Heft 1, Seite(n) 53

    Mesh-Begriff(e) Electrocardiography ; Heart Block ; Humans ; Myocardial Infarction ; Non-ST Elevated Myocardial Infarction ; Risk Factors ; ST Elevation Myocardial Infarction
    Sprache Englisch
    Erscheinungsdatum 2020-02-27
    Erscheinungsland India
    Dokumenttyp Journal Article ; Observational Study
    ZDB-ID 800766-4
    ISSN 0004-5772
    ISSN 0004-5772
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  3. Artikel: Heartburn Center Set-Up in a Community Setting: Engineering and Execution.

    Maini, Atul / Sun, John / Buniak, Borys / Jantsch, Stacey / Czajak, Rachel / Frey, Tara / Kumar, B Siva / Chawla, Amarpreet

    Frontiers in medicine

    2021  Band 8, Seite(n) 662007

    Abstract: Background: ...

    Abstract Background:
    Sprache Englisch
    Erscheinungsdatum 2021-11-10
    Erscheinungsland Switzerland
    Dokumenttyp Journal Article
    ZDB-ID 2775999-4
    ISSN 2296-858X
    ISSN 2296-858X
    DOI 10.3389/fmed.2021.662007
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  4. Artikel ; Online: Novel Lead-free biocompatible piezoelectric Hydroxyapatite (HA) – BCZT (Ba0.85Ca0.15Zr0.1Ti0.9O3) nanocrystal composites for bone regeneration

    Manohar Chelli Sai / Kumar B Siva / Sadhu Sai Pavan Prashanth / Srimadh Sai Krishna / Muthukumar V Sai / Venketesh S. / Varma K. B. R.

    Nanotechnology Reviews, Vol 8, Iss 1, Pp 61-

    2019  Band 78

    Abstract: BCZT (Ba0.85Ca0.15Zr0.1Ti0.9O3) is a recent class of lead-free ferroelectric material associated with high piezoelectric coefficient, making it suitable to inspire hydroxyapatite (HA)-BCZT ceramics for bone materials. Nano-crystalline hydroxyapatite (HA) ...

    Abstract BCZT (Ba0.85Ca0.15Zr0.1Ti0.9O3) is a recent class of lead-free ferroelectric material associated with high piezoelectric coefficient, making it suitable to inspire hydroxyapatite (HA)-BCZT ceramics for bone materials. Nano-crystalline hydroxyapatite (HA) synthesized using the hydrothermal route was characterized via FT-IR, Raman spectroscopy, X-ray powder diffraction (XRD), and Scanning Electron Microscopy (SEM). We also rationalized its formation as a function of operating conditions such as dwell time and temperature in this route. The nano-crystalline BCZT powder was synthesized via a sol-gel technique and its structural and morphological characterization were carried out using Raman Spectroscopy, XRD and Transmission Electron Microscopy (TEM). These investigations facilitated the optimization of HA-BCZT compositions and their electrical poling conditions to achieve enhanced piezoelectric effect. The composites (HA-BCZT) sintered at 1350∘C exhibited promising piezoelectric properties. We report the enhanced piezoelectric coefficient (d33) of 7±1 pC/N for 50% HA-BCZT which is significant as compared to that reported in the literature for ~98% BT (barium titanate) -HA composites. We highlight the role of Simulated Body Fluid (SBF) on the intriguing phase-change of Tricalcium Phosphate (TCP) obtained at this sintering temperature, to hydroxyapatite for its essential contribution to promote bone growth. We theoretically support the confirmed in vitro biocompatibility of these composites.
    Schlagwörter hydroxyapatite ; bczt ; piezoelectricity ; bone regeneration ; biocompatibility ; Technology ; T ; Chemical technology ; TP1-1185 ; Physical and theoretical chemistry ; QD450-801
    Thema/Rubrik (Code) 620
    Sprache Englisch
    Erscheinungsdatum 2019-05-01T00:00:00Z
    Verlag De Gruyter
    Dokumenttyp Artikel ; Online
    Datenquelle BASE - Bielefeld Academic Search Engine (Lebenswissenschaftliche Auswahl)

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  5. Artikel ; Online: Synthesis and bio-activity evaluation of tetraphenyl(phenylamino) methylene bisphosphonates as antioxidant agents and as potent inhibitors of osteoclasts in vitro.

    Balakrishna, A / Narayana Reddy, M Veera / Rao, P Visweswara / Kumar, M Anil / Kumar, B Siva / Nayak, S K / Reddy, C Suresh

    European journal of medicinal chemistry

    2011  Band 46, Heft 5, Seite(n) 1798–1802

    Abstract: A new series of tetraphenyl bisphosphonates have been elegantly synthesized by one-pot method and were characterized by elemental analysis, FTIR, 1H, 13C, 31P NMR, mass spectra and evaluated for their in vitro antibone resorptive activity by inhibiting ... ...

    Abstract A new series of tetraphenyl bisphosphonates have been elegantly synthesized by one-pot method and were characterized by elemental analysis, FTIR, 1H, 13C, 31P NMR, mass spectra and evaluated for their in vitro antibone resorptive activity by inhibiting growth of osteoclasts. Two bisphosphonates 3g and 3f showed marked inhibition ratio (8 μM and 10 μM) and emerged as lead compounds. All compounds were tested for their antioxidant (DPPH scavenging, reducing power and inhibition of lipid peroxidation). They exhibited potent in vitro antioxidant activity dose-dependently.
    Mesh-Begriff(e) Aniline Compounds/chemical synthesis ; Aniline Compounds/chemistry ; Aniline Compounds/pharmacology ; Animals ; Antioxidants/chemical synthesis ; Antioxidants/chemistry ; Antioxidants/pharmacology ; Cells, Cultured ; Dose-Response Relationship, Drug ; Lipid Peroxidation/drug effects ; Molecular Structure ; Organophosphonates/chemistry ; Osteoclasts/cytology ; Osteoclasts/drug effects ; Rats ; Rats, Sprague-Dawley ; Stereoisomerism ; Structure-Activity Relationship
    Chemische Substanzen Aniline Compounds ; Antioxidants ; Organophosphonates
    Sprache Englisch
    Erscheinungsdatum 2011-05
    Erscheinungsland France
    Dokumenttyp Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 188597-2
    ISSN 1768-3254 ; 0009-4374 ; 0223-5234
    ISSN (online) 1768-3254
    ISSN 0009-4374 ; 0223-5234
    DOI 10.1016/j.ejmech.2011.02.038
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  6. Artikel: Effects of vitamin A deficiency during pregnancy on maternal and child health.

    Radhika, M S / Bhaskaram, P / Balakrishna, N / Ramalakshmi, B A / Devi, Savitha / Kumar, B Siva

    BJOG : an international journal of obstetrics and gynaecology

    2003  Band 109, Heft 6, Seite(n) 689–693

    Abstract: Objective: To examine the association between biochemical vitamin A deficiency in pregnancy and maternal and fetal health.: Design: A cross sectional clinical study.: Setting: Antenatal clinic of nutrition unit of Niloufer Hospital catering for a ... ...

    Abstract Objective: To examine the association between biochemical vitamin A deficiency in pregnancy and maternal and fetal health.
    Design: A cross sectional clinical study.
    Setting: Antenatal clinic of nutrition unit of Niloufer Hospital catering for a low socio-economic population, and a private nursing home (Swapna nursing home) catering for a high socio-economic population.
    Population: 736 pregnant women in their third trimester of pregnancy belonging to low (n = 522) and high socio-economic groups (n = 214).
    Methods: All the women were subjected to a detailed clinical, anthropometric and obstetric examination. Night blindness was assessed by administering the standard WHO questionnaire. Birthweight and gestational age of the infants, maternal anaemia and development of pregnancy-induced hypertension in the mother were recorded. Haemoglobin and serum retinol were estimated at the time of recruitment to the study.
    Main outcome measures: Serum retinol levels, anaemia, pregnancy-induced hypertension, birthweight and gestational age of the infant.
    Results: Night blindness was observed in 2.9% of the women and subclincal vitamin A deficiency (serum retinol <20 microg/dL with no clinical signs) in 27% of the women. Moderate to severe anaemia was observed in 41.2% of the women, and 15.8% of the women developed pregnancy-induced hypertension. Sixty-one (9.4%) women delivered preterm. Univariate analysis identified a significant association between serum retinol <20 microg/dL and preterm delivery (OR = 1.74, 95% CI 1.03-2.96), maternal anaemia (OR = 1.82, 95% CI 1.28-2.60) and pregnancy-induced hypertension (OR = 1.56, 95% CI 1.02-2.83). After adjusting for the confounding variables (body mass index, parity, age and socio-economic status) in a multivariate analysis, the significant associations between serum retinol <20 microg/dL and preterm delivery (P = 0.02) and anaemia (P = 0.003) persisted, while that for pregnancy-induced hypertension disappeared (P = 0.71).
    Conclusion: The study suggests that subclinical vitamin A deficiency is a problem during the third trimester of pregnancy. Serum concentration of retinol <20 microg/dL appears to indicate a deficient status, and is associated with an increased risk of preterm delivery and maternal anaemia.
    Mesh-Begriff(e) Adult ; Birth Weight ; Child ; Child Welfare ; Cross-Sectional Studies ; Female ; Gestational Age ; Humans ; Hypertension/etiology ; Maternal Welfare ; Obstetric Labor, Premature/etiology ; Odds Ratio ; Pregnancy ; Pregnancy Complications, Cardiovascular/etiology ; Pregnancy Complications, Hematologic/etiology ; Pregnancy Trimester, Third ; Risk Factors ; Vitamin A/blood ; Vitamin A Deficiency/blood ; Vitamin A Deficiency/complications
    Chemische Substanzen Vitamin A (11103-57-4)
    Sprache Englisch
    Erscheinungsdatum 2003-02-21
    Erscheinungsland England
    Dokumenttyp Journal Article
    ZDB-ID 2000931-8
    ISSN 1471-0528 ; 1470-0328 ; 0306-5456
    ISSN (online) 1471-0528
    ISSN 1470-0328 ; 0306-5456
    DOI 10.1111/j.1471-0528.2002.01010.x
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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