Enhanced pursuance of dye-sensitized solar cell for indoor and outdoor stability using reduced graphene oxide @ Mn2O3 nanocomposite

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.

How to use cloud sensitivity to constrain and predict changes in cloud cover

Arjun Babu N,June-Yi Lee,Axel Timmermann 한국기상학회 2018 한국기상학회 학술대회 논문집 Vol.2018 No.10

Outcomes of Microendoscopic Discectomy and Percutaneous Transforaminal Endoscopic Discectomy for the Treatment of Lumbar Disc Herniation: A Comparative Retrospective Study

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.

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.

Slide Session : OS-RES-08 ; Oncology : Ventilator Associated Pneumonia - Incidence, Antibiogram of Pathogens Isolated and Clinical Outcome

( 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.

Poster Session : PS 0598 ; Critical Care Medicine ; Respiratory Failure in Severe Neuroparalytic Snake Bite - Experience of A North Indian Tertiary Care Hospital

( 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.

Generalization of whipplee`s theorem for double series

( Arjun K. Rathie ),( Vimal K. Gaur ),( Yong Sup Kim ),( Chan Bong Park ) 호남수학회 2004 호남수학학술지 Vol.26 No.1

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.

Can pelvic node dissection at radical prostatectomy influence the nodal recurrence at salvage lymphadenectomy for prostate cancer?

Arjun Sivaraman,Nicole Benfante,Karim Touijer,Jonathan Coleman,Peter Scardino,Vincent Laudone,James Eastham 대한비뇨의학회 2018 Investigative and Clinical Urology Vol.59 No.3

Purpose: To verify the quality of pelvic lymph node dissection (PLND) performed at radical prostatectomy (RP) and its impact on nodal recurrence in patients undergoing salvage lymph node dissection (sLND). Materials and Methods: Retrospective review of 48 patients who underwent sLND for presumed nodal recurrence, to describe the PLND characteristics at RP and correlate the anatomical sites and number of suspicious nodes reported in radiological imaging and final pathology of sLND. Results: Overall, at RP, 8 (16.7%) did not undergo PLND, 32 (66.7%) and 8 (16.7%) received a “limited” (between external iliac vein and obturator nerve) and an “extended” (external iliac, hypogastric, and obturator) dissection, respectively. Median nodes removed during limited and extended dissection were 2 and 24, respectively. At sLND, the mean age was 61.3 years and median prostate specific antigen (PSA) was 1.07 ng/mL. Median nodes removed at sLND were 17 with a median of 2 positive nodes. Recurrent nodes were identified within the template of an extended PLND in 62.5%, 50.0% and 12.5% patients, respectively, following prior no, limited and extended dissection at RP. Recurrence outside the expected lymphatic drainage pathway was noted in 37.5% patients with prior extended dissection at RP. There was a correlation between imaging and pathology specimen in 83% for node location and 58.3% for number of anatomical sites involved. Conclusions: In prostate cancer patients undergoing sLND, most had inadequate PLND at the original RP. Pattern of nodal recurrence may be influenced by the prior dissection and pre sLND imaging appears to underestimate the nodal recurrence.

A case report of an accessory flexor digitorum profundus indicis contributing the first lumbrical

Arjun Malhotra,Randy Kulesza 대한해부학회 2022 Anatomy & Cell Biology Vol.55 No.3

Variations of the musculature within the upper extremity have been widely documented, with clinical implications ranging from motor dysfunction to compressive neuropathies. Herein, we described an aberrant muscle that originated from the anterior proximal forearm, formed a tendon that coursed through the carpal tunnel, and converged with the flexor digitorum profundus muscle to contribute to the first lumbrical. Additionally, the second lumbrical consisted of two heads, originating from the index and middle finger tendons of flexor digitorum profundus. Documentation and recognition of such anatomic variants is important, as this anatomic pattern may contribute to anterior interosseous or median nerve compression, incoordination, complications during surgery, and other clinical manifestations.