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- 저자 : ARJUN, PANDIAN (검색결과 239 건)
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Arjun Sinkemani,Xin Hong,Zeng-Xin Gao,Su-Yang Zhuang,Zan-Li Jiang,Shao-Dong Zhang,Jun-Ping Bao,Lei Zhu,Pei Zhang,Xin-Hui Xie,Feng Wang,Xiao-Tao Wu 대한척추외과학회 2015 Asian Spine Journal Vol.9 No.6
Study Design: Retrospective, case control evaluation of 86 patients who underwent microendoscopic discectomy (MED) and percutaneous transforaminal endoscopic discectomy (PTED) for the treatment of lumbar disc herniation (LDH). Purpose: To evaluate the safety and the outcomes of MED and PTED for the treatment of LDH. Overview of Literature: MED and PTED are minimally invasive surgical techniques for lower back pain. Studies to date have shown that MED and PTED are safe and effective treatment modalities for LDH. Methods: A retrospective study was performed in patients with LDH treated with MED (n=50) and transforaminal endoscopic discectomy (PTED; n=36) in our hospital. All patients were followed-up with self-evaluation questionnaires, Oswestry disability index (ODI), medical outcomes study 36-item short form health survey and MacNab criteria. All the patients in both groups were followed up to 12 months after the operation. Results: ODI questionnaire responses were not statistically different between the MED and PTED groups (53.00 vs. 48.72) before treatment. Average scores and minimal disability after 5 days to 12 months of follow-up were 4.96 in the MED group and 3.61 in the PTED group. According to MacNab criteria, 92.0% of the MED group and 94.4% of the PTED group had excellent or good results with no significant difference. Conclusions: There was no significant difference between MED and PTED outcomes. Further large-scale, randomized studies with long-term follow-up are needed.
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Arjun Gontala,Gwang Seok Jang,Sang Kook Woo 대한화학회 2021 Bulletin of the Korean Chemical Society Vol.42 No.3
The development of a greener allylation reagent for α-allylation of carbonyl compounds is of great necessity. Here we present allyltrimethylsilane as a novel allylation reagent in the photoredox-catalyzed α-allylation of carbonyl compounds such as ketones, esters, and amides. The reaction process shows good functional group tolerance and generates a good yield of the product. The reaction mechanism is a radical-mediated reaction by photo-induced single electron transfer.
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Semiempirical model for wet scrubbing of bubble rising in liquid pool of sodium-cooled fast reactor
Arjun Pradeep,Anil Kumar Sharma 한국원자력학회 2018 Nuclear Engineering and Technology Vol.50 No.6
Mechanistic calculations for wet scrubbing of aerosol/vapor from gas bubble rising in liquid pool areessential to safety of sodium-cooled fast reactor. Hence, scrubbing of volatile fission product from mixedgas bubble rising in sodium pool is presented in this study. To understand this phenomenon, a theoreticalmodel has been setup based on classical theories of aerosol/vapor removal from bubble rising throughliquid pools. The model simulates pool scrubbing of sodium iodide aerosol and cesium vapor from arising mixed gas bubble containing xenon as the inert species. The scrubbing of aerosol and vapor aremodeled based on deposition mechanisms and Fick's law of diffusion, respectively. Studies were performedto determine the effect of various key parameters on wet scrubbing. It is observed that for highervapor diffusion coefficient in gas bubble, the scrubbing efficiency is higher. For aerosols, the cut-off sizeabove which the scrubbing efficiency becomes significant was also determined. The study evaluates theretention capability of liquid sodium used in sodium-cooled fast reactor for its safe operation.
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Arjun Kumar B.,Ramalingam Gopal,Al Omari Salah Addin Burhan,Nallabala Nanda Kumar Reddy,Sakthivel P.,Kabeer Saifudeen,Sangaraju Sambasivam 한국탄소학회 2024 Carbon Letters Vol.34 No.3
Herein, the present work focuses on the effective counter electrode for dye-sensitized solar cells. The bottom–up approach was adapted to synthesize Mn2O3 nanorods via the hydrothermal method and the reduced graphene oxide was merged with Mn2O3 to prepare a nanocomposite. The prepared nanocomposites were subjected to physio-chemical and morphological characterizations which revealed the crystalline nature of Mn2O3 nanorods. The purity level rGO was characterized using the Raman spectrum and the Fourier transform infrared spectroscopy employed to find the functional groups. The morphological micrographs were visualized using SEM and TEM and the high aspect ratio Mn2O3 nanorods were observed with 5–7 nm and supported by rGO sheets. The electrocatalytic nature and corrosion properties of the counter electrode towards the iodide electrolyte were studied using a symmetrical cell. The as-synthesized nanocomposites were introduced as counter electrodes for DSSC and produced 4.11% of photoconversion efficiency with lower charge transfer resistance. The fabricated DSSC devices were undergone for stability tests for indoor and outdoor atmospheres, the DSSC stability showed 93% and 80% respectively for 150 days.
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( Arjun Khanna ) 대한내과학회 2014 대한내과학회 추계학술대회 Vol.2014 No.1
Background: Ventilator associated pneumonia (VAP) is an important cause of morbidity and mortality in mechanically ventilated patients globally. The aim of this study was to fi nd out the incidence of VAP at our institution, to evaluate the antibiotic sensitivity pattern of microorganisms isolated and to assess clinical outcome in VAP. Methods: A total of 107 patients who were not having pneumonia at presentation and who were mechanically ventilated for more than 48 hours for various indications were included in the study. APACHE II score of fi rst day was recorded. The diagnosis of VAP was established using clinical pulmonary infection score of more than 6. Gram staining and culture sensitivity using Kirby -Bauer disc diffusion method was performed on all endotracheal aspirates and antibiotic therapy modifi ed accordingly. The results were analysed to determine the incidence and clinical outcome in VAP. Results: 30 out of 107 patients (28.03%) developed VAP.25 patients developed late onset VAP while 5 developed early onset VAP. Most common isolates were Pseudomonas aeruginosa (9 isolates) followed by MRSA (8isolates), Klebsiella pnueumoniae( 7 isolates) and Acinetobacter baumanii(6 isolates). Klebsiella pnueumoniae and Acinetobacter baumanii were found to be most lethal. Most isolates of Klebsiella were extended spectrum Beta Lactamase producing and all Acinetobacter were carbapenem resistant. Mortality in VAP was 46.67% and correlated well with a higher mean APACHE II score of 18.3 as compared to a mortality of 28.57 in non VAP group with a low mean APACHE II score of 13.1. Conclusion: The development of VAP was associated with increased morbidity and mortality and a higher mean APACHE II score at admission. The incidence of multidrug resistant pathogens is rising and therefore it is important to identify them as this information will help in the selection of an appropriate antibiotic regimen and decrease the treatment costs and improve outcome.
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( Arjun Khanna ) 대한내과학회 2014 대한내과학회 추계학술대회 Vol.2014 No.1
Background: Poisonous snake bites are a common, life threatening emergency in tropical Asian countries like India. The aim was to treat patients with neuroparalytic snake bite using polyvalent Anti snake venom(ASV) along with ventilatory support and to assess outcome with respect to hospital survival, duration of mechanical ventilation, amount of ASV given and complications if any, associated with mechanical ventilation or ASV. Methods: The study included 58 patients with severe neurotoxic snake bite who required mechanical ventilation for respiratory failure. They were administered 200 ml of polyvalent ASV. Outcome measures studied included hospital survival, duration of mechanical ventilation, amount of ASV given and complications associated with mechanical ventilation or ASV administration. Result: All patients were administered an initial bolus dose of 200 ml ASV, followed by repeated doses of 100 ml ASV every six hours until the patient showed signs of neurological recovery. Mean total dose of ASV administered was 412 ml. All patients were initially ventilated using Assist control(A/C) mode of ventilation. Mean duration of ventilation on A/C mode was 30.89 hours. 56 patients were weaned off successfully using pressure support mode. Mean duration of weaning was 7 hours. 4 patients developed Ventilator associated pneumonia 2 patients expired, one due to ventilator associated pneumonia and the other due to septicaemia. 56 patients who survived did not have any residual neurological defi cit clinically. Conclusion: We conclude that in the management of neurotoxic snake bite, administration of a high initial bolus dose of 200 ml ASV and repeated doses of 100 ml ASV every six hours until signs of neurological recovery, supported by Assist control mode of ventilation resulted in an early recovery, a reduced total dose of ASV consumed, reduced the duration of mechanical ventilation, reduced the incidence of complications and thus, was much more cost effective.
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Certain summation formulas due to Ramanujan and their generalizations
Arjun K. Rathie,Shaloo Malani,Rachana Mathur,최준상 대한수학회 2005 대한수학회보 Vol.42 No.3
The authors aim at deriving four generalized summationformulas, which, upon specializing their parameters, give manysummation identities including, especially, the four veryinteresting summation formulas due to Ramanujan. The results arederived with the help of generalized Dixon's theorem obtained earlier by Lavoie, Grondin, Rathie, and Arora.
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Generalization of Whipple's theorem for double series
Arjun K. Rathie,Vimal K. Gaur,Yong Sup Kim,Chan Bong Park 호남수학회 2004 호남수학학술지 Vol.26 No.1
In 1965, Bhatt and Pandey have obtained an analogue of the Whipple's theorem for double series by using Watson's theo- rem on the sum of a 3F2. The aim of this paper is to derive twenty 칥e results for double series closely related to the analogue of the Whipple's theorem for double series obtained by Bhatt and Pandey. The results are derived with the help of twenty 칥e summation for- mulas closely related to the Watson's theorem on the sum of a 3F2 obtained recently by Lavoie, Grondin, and Rathie.
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Arjun S. Sebastian,Nathan R. Wanderman,Bradford L. Currier,Mark A. Pichelmann,Vickie M. Treder,Jeremy L. Fogelson,Michelle J. Clarke,Ahmad N. Nassr 대한척추외과학회 2019 Asian Spine Journal Vol.13 No.4
Study Design: Prospective observational cohort study. Purpose: This study aims to evaluate the safety and efficacy of bone morphogenetic protein-2 (BMP-2) in transforaminal lumbar interbody fusion (TLIF) with regard to postoperative radiculitis. Overview of Literature: Bone morphogenetic protein (BMP) is being used increasingly as an alternative to iliac crest autograft in spinal arthrodesis. Recently, the use of BMP in TLIF has been examined, but concerns exist that the placement of BMP close to the nerve roots may cause postoperative radiculitis. Furthermore, prospective studies regarding the use of BMP in TLIF are lacking. Methods: This prospective study included 77 patients. The use of BMP-2 was determined individually, and demographic and operative characteristics were recorded. Leg pain was assessed using the Visual Analog Scale (VAS) for pain and the Sciatica Bothersome Index (SBI) with several secondary outcome measures. The outcome data were collected at each follow-up visit. Results: Among the 77 patients, 29 were administered with BMP. Postoperative leg pain significantly improved according to VAS leg and SBI scores for the entire cohort, and no clinically significant differences were observed between the BMP and control groups. The VAS back, Oswestry Disability Index, and Short-Form 36 scores also significantly improved. A significantly increased 6-month fusion rate was noted in the BMP group (82.8% vs. 55.3%), but no significant differences in fusion rate were observed at the 12- and 24-month follow-up. Heterotopic ossification was observed in seven patients: six patients and one patient in the BMP and control groups, respectively (20.7% vs. 2.1%). However, no clinical effect was observed. Conclusions: In this prospective observational trial, the use of BMP in TLIF did not lead to significant postoperative radiculitis, as measured by VAS leg and SBI scores. Back pain and other functional outcome scores also improved, and no differences existed between the BMP and control groups. The careful use of BMP in TLIF appears to be both safe and effective.
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