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( Anoop Jhurani ),( Piyush Agarwal ),( Mukesh Aswal ),( Purvi Saxena ),( Nidhi Singh ) 대한슬관절학회 2018 대한슬관절학회지 Vol.30 No.2
Purpose: Restoring the native patellar thickness after patellar resurfacing provides optimal function of the knee after arthroplasty and minimises complications related to the patellofemoral articulation. The aim of this study was to assess the usefulness of a thin patellar button (6.2 mm) in patients with a patella thickness of less than 20 mm during total knee arthroplasty. Materials and Methods: This is a retrospective case control study. A total of 54 female patients with an intraoperative patellar thickness of <20 mm, resurfaced with a patellar button of 6.2 mm in thickness were identified (group 1). They were matched with 54 patients with a patellar thickness of 20-23 mm, resurfaced with a patellar button of 8 mm (group 2), based on age, sex, body mass index, and deformity. A clinical and radiological evaluation was done at a minimum 2-year follow-up. Results: The preoperative mean patellar thickness was 18.94±1.07 mm and was restored to 19.06±0.79 mm in group 1, as compared to 21.63±0.99 mm and 21.72±0.99 mm in group 2. The mean postoperative range of motion was 122.22°±9.25° in group 1 and 123.52°±8.72° in group 2 (p=0.13). No patellar bone or button related complications were observed in any patient in either group. Conclusions: The 6.2 mm thin patella is useful to restore the native thickness in patients with a patellar thickness of less than 20 mm without risk of button fracture, loosening or overstuffing.
( Anoop Jhurani ),( Gautam M. Shetty ),( Vinay Gupta ),( Purvi Saxena B. Tech ),( Nidhi Singh M. Pharm ) 대한슬관절학회 2016 대한슬관절학회지 Vol.28 No.3
Purpose: Simultaneous bilateral total knee arthroplasty (TKA) is associated with excessive blood loss and morbidity arising from postoperative reduction in hemoglobin (Hb). The purpose of this prospective randomized study was to determine if drains have any effect on blood loss, postoperative reduction in Hb levels and transfusion rates compared to no drainage in simultaneous bilateral TKAs. Materials and Methods: Two hundred and thirty patients who underwent simultaneous bilateral TKA by a single surgeon were randomly allotted to drain or no-drain group (n=115 in each group). Postoperative Hb level, blood loss volume and transfusion rate were compared between the two groups. Results: The mean postoperative Hb level (p=0.38), blood loss volume (p=0.33) and transfusion rate (p=0.52) in the drain group were not significantly different compared to the no-drain group. No statistical difference was found in terms of complications, readmissions and mortality rates between the two groups. Conclusions: No significant difference was observed in the two groups with respect to blood loss and blood transfusion. Non-drainage does not offer an advantage over drainage with respect to conserving blood in simultaneous bilateral TKA.
Anoop R. Galivanche,Raj Gala,Preetpaul S. Bagi,Arianne J. Boylan,Christopher M. Dussik,Pedro D. Coutinho,Jonathan N. Grauer,Arya G. Varthi 대한척추신경외과학회 2020 Neurospine Vol.17 No.4
Objective: To compare the perioperative morbidity of 2-level anterior cervical discectomy and fusion (ACDF) with that of 1-level anterior cervical corpectomy and fusion (ACCF) for the treatment of cervical degenerative conditions. Methods: A retrospective study of the 2005–2016 National Surgical Quality Improvement Program database for patients undergoing 2-level ACDF and 1-level ACCF was performed. Patient data included: age, sex, body mass index (BMI), functional status, and American Society of Anesthesiologists (ASA) physical status (PS) classification. Hospital data included: operative time and length of hospital stay (LOS). Thirty-day outcome data included: any, serious, and minor adverse events, return to the operating room, readmission, and mortality. After propensity matching for age, sex, ASA PS classification, functional status, and BMI, multivariate logistic regression analysis was used to compare outcomes between the 2 propensity-matched subcohorts. Finally, multivariate logistic regression that additionally controlled for operative time was performed to compare the 2 propensity-matched subcohorts. Results: A total of 17,497 cases were identified, with 90.20% undergoing 2-level ACDF and 9.80% undergoing 1-level ACCF. Patients undergoing 2-level ACDF were younger, more likely to be female, had higher functional status, and had shorter operative time and LOS (p<0.001). After propensity score matching, cases undergoing 1-level ACCF had a statistically significant higher rate of serious adverse events (p=0.005). This difference was no longer significant after controlling for operative time. Conclusion: While there was noted to be additional morbidity in 1-level ACCF cases relative to 2-level ACDF cases, the lack of difference once controlling for the surgical time supports using the procedure that best accomplishes the surgical objectives.
Anoop Johny,C. Thiagarajan 한양대학교 세라믹연구소 2022 Journal of Ceramic Processing Research Vol.23 No.4
In this work, titanium grade 2 alloy is evaluated for their machinability behavior using novel reciprocating wire-cut electricaldischarge machining (RWEDM) by changing the wire feed rate, flow rate of dielectric, variable frequency and current as perTaguchi’s approach (L27 orthogonal array) towards maximizing material removal rate (MRR) and minimizing surfaceroughness (SR) and kerf width (KW). A multiple attribute decision method, The Technique for Order of Preference bySimilarity to Ideal Solution (TOPSIS) is implemented for simultaneous optimization of output responses. The ideal conditionobtained is: wire feed of 8 mm/min, flow rate of 15 g/sec, variable frequency of 22 Hz and current density of 220 A. Analysisof Variance identifies that the influence of feed rate of wire electrode is noteworthy with a contribution of 67.12% followedby flow rate and variable frequency. Recast layer on the machined specimens is also evaluated using scanning electronmicroscope (SEM) images which shows lower distortion. A metaheuristic particle swarm optimization (PSO) optimizationmethod is utilized for further optimizing the output responses and is found that the results obtained matches with the resultsof TOPSIS. Finally, a validation experiment is performed with ideal conditions of input parameters and verified.
Anoop Kumar Srivastava,김종윤,여성구,정진영,최이준,SINGHVIJAY,이지훈 한국물리학회 2017 Current Applied Physics Vol.17 No.6
We investigated the dielectric dispersion property of a bent-core liquid crystal (BLC) with a large kink angle in the frequency range of 1.0 Hze5.5 MHz in a planar aligned cell. Single dielectric dispersion was observed in the smectic A, nematic, and isotropic phase of the planar aligned sample. The dielectric strengths, relaxation frequencies, distribution parameters, and dc conductivity were measured as a function of temperature. The dielectric strength of the observed relaxation mode was anomalously high (~70), whereas the relaxation frequency was low at ~500 Hz. The relaxation mode observed in the planar aligned cell was attributed to the fluctuations in the polarization direction due to the cooperative motion of the molecules.
Helicobactericidal Activity of Cissus quadrangularis L. Variant I
Anoop Austin,Jegadeesan. M.,Gowrishankar. R. 한국생약학회 2004 Natural Product Sciences Vol.10 No.5
Cissus quadrangularis L. variant I (Family: Vitaceae), the common variant with square stem is widely used for peptic ulcer disorders (PUD) in traditional medicine. Aerial parts were collected during flowering and vegetative seasons and analysed. Aqueous (hot and cold) and solvent extracts (acetone, chloroform and ethanol) were screened for their anti-Helicobacter pylori (Hp) activities. Among them chloroform extract was observed to recover bioactive principles markedly with low minimal inhibitory concentration (MIC) and minimal lethal concentration (MLC). MIC was 30 μg in both samples and MLC was 35 μg for vegetative and 30 μg for flowering seasons, respectively. Extracts from samples collected during flowering season were better than thse of vegetative season.
Anoop, G.,Cho, I. H.,Suh, D. W.,Yoo, J. S. WILEY‐VCH Verlag 2012 Physica status solidi. PSS. A, Applications and ma Vol.209 No.12
<P><B>Abstract</B></P><P>Sr<SUB>1−<I>x</I></SUB>Ba<SUB><I>x</I></SUB>Si<SUB>2</SUB>O<SUB>2</SUB>N<SUB>2</SUB>:Eu<SUP>2+</SUP> phosphors were synthesized using high temperature solid state reaction. The effect of Ba incorporation on the structural and luminescence characteristics of SrSi<SUB>2</SUB>O<SUB>2</SUB>N<SUB>2</SUB>:Eu<SUP>2+</SUP> phosphors were studied. The phosphors were crystallized in triclinic crystal structure and the cell volume increases monotonically with Ba addition. The PL emission peak wavelength red shifts with Ba up to <I>x</I> = 0.50 beyond which no red shift is observed. The XPS analysis shows that nitrogen is being incorporated into the host lattice along with Ba addition up to <I>x</I> = 0.50. The as synthesized phosphors show high thermal stability. Phosphor converted light emitting diodes were realized using Sr<SUB>1−<I>x</I></SUB>Ba<SUB><I>x</I></SUB>Si<SUB>2</SUB>O<SUB>2</SUB>N<SUB>2</SUB>:Eu<SUP>2+</SUP> phosphors (<I>x</I> = 0 and <I>x</I> = 0.40) showing luminance efficacies of 108 and 101 lm W<SUP>−1</SUP>. </P><P>The CIE chromaticity coordinates of Sr<SUB>1−<I>x</I></SUB>Ba<SUB><I>x</I></SUB>Si<SUB>2</SUB>O<SUB>2</SUB>N<SUB>2</SUB>:Eu (<I>x</I> = 0 and <I>x</I> = 0.40) phosphors.</P>
Anoop, G.,Seo, Juhee,Han, Chang Jo,Lee, Hyeon Jun,Kim, Gil Woong,Lee, Sung Su,Park, Eun Young,Jo, Ji Young Elsevier 2015 SOLAR ENERGY -PHOENIX ARIZONA THEN NEW YORK- Vol.111 No.-
<P><B>Abstract</B></P> <P>For transparent solar cells, Sn:In<SUB>2</SUB>O<SUB>3</SUB>/Pb(Zr, Ti)TiO<SUB>3</SUB>/Pt(⩽5nm)/Sn:In<SUB>2</SUB>O<SUB>3</SUB> capacitor structures were fabricated using a cost-effective solution process. The insertion of ultra-thin Pt layer between the bottom Sn:In<SUB>2</SUB>O<SUB>3</SUB> electrode and Pb(Zr, Ti)TiO<SUB>3</SUB> plays a critical role in the photovoltaic characteristics of the capacitors. The Pb(Zr,Ti)O<SUB>3</SUB> capacitors with a 5nm thick Pt layer showed excellent polarization–voltage curves with reduced leakage current due to both partial (111) orientation of Pb(Zr,Ti)O<SUB>3</SUB> and alloy formation between Pt and the Sn:In<SUB>2</SUB>O<SUB>3</SUB> bottom electrode, as confirmed using X-ray photoelectron spectra analysis. The capacitors with a 5nm thick Pt layer exhibit transmittance of 45–50% in the visible light region. The current density–voltage characteristics under light illumination (AM1.5G) exhibit an open circuit voltage value of −0.62V and short circuit current density of 0.6μA/cm<SUP>2</SUP> after negative poling, with a maximum power conversion efficiency of 1.7×10<SUP>−4</SUP>%. The open circuit voltage of the capacitors with a 5nm thick Pt layer is larger with negative poling due to the higher net internal bias arising from the Schottky barrier.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Transparent Pb(Zr,Ti)O<SUB>3</SUB> (PZT) capacitors were fabricated using cost-effective solution process. </LI> <LI> Photovoltaic response was investigated by introducing ultra-thin Pt layer between bottom electrode and PZT. </LI> <LI> Introduction of Pt layer reduces the leakage current and enhances ferroelectric and PV response. </LI> <LI> The transmittance of the capacitors were 45–50% in visible region. </LI> </UL> </P>