Dielectric properties of Li2O-3B2O3 glasses

The frequency and temperature dependence of the dielectric constant and the electrical conductivity of the transparent glasses in the composition Li2O-3B2O3 (LBO) were investigated in the 100 Hz- 10 MHz frequency range. The dielectric constant and the loss in the low frequency regime were electrode material dependent. Dielectric and electrical relaxations were respectively analyzed using the Cole-Cole and electric modulus formalisms. The dielectric relaxation mechanism was discussed in the framework of electrode and charge carrier (hopping of the ions) related polarization using generalized Cole-Cole expression. The frequency dependent electrical conductivity was rationalized using Jonscher's power law. The activation energy associated with the dc conductivity was 0.80 \pm 0.02 eV, which was ascribed to the motion of Li+ ions in the glass matrix. The activation energy associated with dielectric relaxation was almost equal to that of the dc conductivity, indicating that the same species took part in both the processes. Temperature dependent behavior of the frequency exponent (n) suggested that the correlated barrier hopping model was the most apposite to rationalize the electrical transport phenomenon in Li2O-3B2O3 glasses. These glasses on heating at 933 K/10h resulted in the known non-linear optical phase LiB3O5.Comment: 32 pages, 13 figure

The glass transition and crystallization kinetic studies on BaNaB9O15 glasses

Transparent glasses of BaNaB9O15 (BNBO) were fabricated via the conventional melt-quenching technique. The amorphous and the glassy nature of the as-quenched samples were respectively, confirmed by X-ray powder diffraction (XRD) and differential scanning calorimetry (DSC). The glass transition and crystallization parameters were evaluated under non-isothermal conditions using DSC. The correlation between the heating rate dependent glass transition and the crystallization temperatures was discussed and deduced the Kauzmann temperature for BNBO glass-plates and powdered samples. The values of the Kauzmann temperature for the plates and powdered samples were 776 K and 768 K, respectively. Approximation-free method was used to evaluate the crystallization kinetic parameters for the BNBO glass samples. The effect of the sample thickness on the crystallization kinetics of BNBO glasses was also investigated.Comment: 23 pages, 12 figure

Economic Liberalization - A Stumbling Block in the Commercialization of Indigenous Calcium Silicide Technology

Indian ferro alloy industry is passing through one of its worst periods by the process of economic liberalization. Its production in our country is coming down mainly due to inadequate indigenous demand, non-availability of exports and high power cost as compared to other competing countries. The indigenous calcium silicide technology developed at National Metallurgical Laboratory; Jamshedpur could not be commercialized on account of thenew economic liberalization policy of Government of India

Effect of scale-up, design and process parameters on the productivity of ancient iron making process and recovery of iron in the product

Indian iron was famous in ancient times and it was exported to many countriesthroughout the world Though isolated pockets of iron making existed practically all over the country, yet there was no attempt of systematization and wider propagation. Recently an attempt has been made to establish proto-type furnace and scale it up with modifications in its design.The effect of scale -up.design and process parameters on the productivity of ancient iron making process and recovery of iron in the product has been discussed

Trends of Publications on Single- and Double-Bundle ACL Reconstructions over the Last 20 Years: A Bibliometric Analysis of the PubMed Literature

Purpose: To improve the clinical outcomes of anterior cruciate ligament reconstruction (ACLR), there have been attempts to reproduce anatomic reconstruction by modifying the single-bundle (SB) and double-bundle (DB) techniques. Although DB ACLR restores better rotational control compared to SB ACLR, it is still debatable whether there are higher clinical outcomes in favor of DB ACLR. We aimed to study the trends of publications on SB and DB ACLR techniques over the last 20 years. Methods: For this bibliometric study, we performed a PubMed search on 31/05/2022 with a well-defined search strategy. The articles were downloaded into Excel software, and citations were determined from the iCite website for PubMed. The analysis was performed using SPSS software version 28.0.1. Data mining was performed using Orange software, Mac version 3.32.0, from the titles of all articles and each group of SB and DB ACLR. The output is presented as word clouds. Results: A total of 10,530 publications were identified, of which 9699 publications (92.1%) pertained to SB-ACLR and 831 publications (7.9%) to DB-ACLR. There was a steady increase in the publications on SB-ACLR until 2012, followed by a steep increase that peaked in 2021. The highest number of publications on DB-ACLR was in 2012 (n = 76; 9.1%). The mean citations per year for SB-ACLR and DB-ACLR were 2.87 ± 4.31 and 2.74 ± 3.17, respectively. The most prolific journals publishing on this topic were Knee Surgery Sports Traumatology Arthroscopy, American Journal of Sports Medicine, and Arthroscopy. The top three articles that received the maximum number of citations were from Japanese authors. Conclusion: The number of publications related to SB-ACLR was significantly higher than that related to DB-ACLR in the last 20 years. The publications related to DB-ACLR have decreased in the recent past, after reaching a peak in 2012. The citations per year of SB-ACLR and DB-ACLR were similar

Rise of Asian research in orthopaedic and sports medicine: a bibliometric analysis from 1996 to 2022

Objectives: This study examines the growth and impact of orthopaedic and sports medicine (OSM) publications across 30 Asian countries from 1996 to 2022 using a bibliometric (scientometric) approach. Despite Asia’s rising academic achievements, prior studies have not comprehensively mapped publication trends in this field across the region. This analysis aims to perform bibliometric analysis in OSM research in the Asian Countries. Methods: Publication data were sourced from the SCImago Journal & Country Rank portal, derived from the SCOPUS database, covering the period from 1996 to 2022, with updates available until April 2023. The analysis focused on the top Asian countries and included key indicators such as H-index and total citations to assess research impact. Results: The study identified a substantial rise in OSM publications from Asia, with total output increasing 14.27-fold—compared to a 5.54-fold increase globally. Between 1996 and 2022, 111,342 OSM publications originated from Asian countries, out of 666,847 globally. However, citation counts for Asian research declined from 26,263 in 1996 to 6020 in 2022, likely reflecting the time-lag effect in citation accumulation for recent publications. Possible contributing factors are discussed. Conclusion: This study highlights a remarkable surge in orthopaedic and sports medicine publications from Asia, surpassing global growth trends. While citation metrics appear lower in recent years—likely due to the recency of publications—the overall trend suggests a strong and growing research in Asia. China and Japan lead in output and impact, respectively, while India’s rapid rise reflects increasing academic potential. However, enhancing research quality and visibility and reducing self-citation are essential to elevate global impact. Countries like Hong Kong, Singapore, and Sri Lanka demonstrate high citation efficiency. With optimal collaboration and strategic investment, Asian countries are well positioned to play a leading role in global orthopaedic research