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      • SCIESCOPUSKCI등재

        Identification of Inrush and Internal Fault in Indirect Symmetrical Phase Shift Transformer Using Wavelet Transform

        Bhasker, Shailendra Kumar,Tripathy, Manoj,Kumar, Vishal The Korean Institute of Electrical Engineers 2017 Journal of Electrical Engineering & Technology Vol.12 No.5

        This paper proposes an algorithm for the differential protection of an Indirect Symmetrical Phase Shift Transformer (ISPST) by considering the different behaviors of the compensated differential current under internal fault and magnetizing inrush conditions. In this algorithm, a criterion function is defined which is based on the difference of amplitude of the wavelet transformation over a specific frequency band. The function has been used for the discrimination between three phase magnetizing inrush and internal fault condition and requires less than a quarter cycle after disturbance. This method is independent of any coefficient or threshold values of wavelet transformation. The merit of this algorithm is demonstrated by the simulation of different faults in series and excitation unit and magnetizing inrush with varying switching conditions on ISPST using PSCAD/EMTDC. Due to unavailability of in-field large interconnected transformers for such a large number of destructive tests, the results are further verified by Real Time Digital Simulator (RSCAD/RTDS). The proposed algorithm has been compared with the conventional harmonic restraint based method that justifies the application of wavelet transform for differential protection of ISPST. The proposed algorithm has also been verified for different rating of ISPSTs and satisfactory results were obtained.

      • SCIESCOPUSKCI등재

        Development of Appropriate Fibrolytic Enzyme Combination for Maize Stover and Its Effect on Rumen Fermentation in Sheep

        Bhasker, T. Vijay,Nagalakshmi, D.,Rao, D. Srinivasa Asian Australasian Association of Animal Productio 2013 Animal Bioscience Vol.26 No.7

        In vitro studies were undertaken to develop an appropriate fibrolytic enzymes cocktail comprising of cellulase, xylanase and ${\beta}$-D-glucanase for maize stover with an aim to increase its nutrient utilization in sheep. Cellulase and xylanase added individually to ground maize stover at an increasing dose rates (0, 100, 200, 400, 800, 1,600, 3,200, 6,400, 12,800, 25,600, 32,000, 38,400, and 44,800 IU/g DM), increased (p<0.01) the in vitro dry matter digestibility and in vitro sugar release. The doses selected for studying the combination effect of enzymes were 6,400 to 32,000 IU/g of cellulase and 12,800 to 44,800 IU/g of xylanase. At cellulase concentration of 6,400 IU/g, IVDMD % was higher (p<0.01) at higher xylanase doses (25,600 to 44,800 IU/g). While at cellulase doses (12,800 to 32,000 IU/g), IVDMD % was higher at lower xylanase doses (12,800 and 25,600 IU/g) compared to higher xylanase doses (32,000 to 44,800 IU/g). At cellulase concentration of the 6,400 to 32,000 IU/g, the amount of sugar released increased (p<0.01) with increasing levels of xylanase concentrations except for the concentration of 44,800 IU/g. No effect of ${\beta}$-D-glucanase (100 to 300 IU/g) was observed at lower cellulase-xylanase dose (cellulase-xylanase 12,800 to 12,800 IU/g). Based on the IVDMD, the enzyme combination cellulase-xylanase 12,800 to 12,800 IU/g was selected to study its effect on feed intake and rumen fermentation pattern, conducted on 12 rams (6 to 8 months; $20.34{\pm}2.369$ kg body weight) fed 50% maize stover based TMR. The total volatile fatty acids (p<0.01) and ammonia-N concentration was higher in enzyme supplemented group, while no effect was observed on dry matter intake, ruminal pH and total nitrogen concentration.

      • KCI등재

        Guillain-Barré Syndrome: Prevalence and Long-Term Factors Impacting Bladder Function in an Australian Community Cohort

        Bhasker Amatya,Fary Khan,Michael Whishaw,Julie F. Pallant 대한신경과학회 2013 Journal of Clinical Neurology Vol.9 No.3

        Background and Purpose Urinary dysfunction is associated with significant morbidity in persons with Guillain-Barré Syndrome (GBS). The aim of this study was to describe prevalence and long-term impact of bladder dysfunction on daily activities and quality of life (QoL) in persons in chronic phase of GBS and to examine the relationships between commonly used continence measures in this cohort. Methods Prospective cohort (n=66) following GBS treatment (1996-2009) was recruited from a tertiary hospital and assessed using standardised measures for bladder dysfunction: American Urological Association (AUA) Symptom Index, Incontinence Impact Questionnaire, Urogenital Distress Inventory. Results Sixty-six participants (64% male, mean age 56 years, median disease duration of 6.1 years) completed the study. Of these more than half reported nocturia and one-third reported urinary urgency and frequency. Urinary problems impacted on participants’ daily activities: physical recreation (21%), emotional health and mood (17%), entertainment (14%), participation and mobility (>30 min) (12%), and performance of household chores (8%). Since GBS, 49% reported interference of urinary symptoms with daily life to some extent; and adverse impact on QoL (10.6%). Significant relationship between bladder symptoms; and the level of urogenital distress (p<0.001) and the impact of urinary problems (p<0.001), was noted. Higher scores on the bladder scales showed significant correlations with psychological, functional and participation scales. The single QoL item (AUA scale) correlated significantly with all other bladder scales (rho=0.63-0.86). This can be a potential ‘screening tool’ to identify patients for further assessment. Conclusions Bladder dysfunction in chronic phase of GBS is not well studied. More research in longer-term screening and outcomes for bladder intervention are needed for integrated care and to guide treating clinicians.

      • KCI등재

        Disaster Response and Management: The Integral Role of Rehabilitation

        Amatya Bhasker,Khan Fary 대한재활의학회 2023 Annals of Rehabilitation Medicine Vol.47 No.4

        With the increasing frequency of disasters and the significant upsurge of survivors with severe impairments and long-term disabling conditions, there is a greater focus on the importance of rehabilitation in disaster management. During disasters, rehabilitation services confront a greater load due to the influx of victims, management of persons with pre-existing disabilities and chronic conditions, and longer-term care continuum. Despite robust consensus amongst the international disaster response and management community for the rehabilitation-inclusive disaster management process, rehabilitation is still less prioritised. Evidence supports the early involvement of rehabilitation professionals in disaster response and management for minimising mortality and disability, and improving clinical outcomes and participation in disaster survivors. In the last two decades, there have been substantial developments in disaster response/management processes including the World Health Organization Emergency Medical Team (EMT) initiative, which provides a standardized structured plan to provide effective and coordinated care during disasters. However, rehabilitation-inclusive disaster management plans are yet to be developed and/or implemented in many disaster-prone countries. Strong leadership and effective action from national and international bodies are required to strengthen national rehabilitation capacity (services and skilled workforce) and empower international and local EMTs and health services for comprehensive disaster management in future calamities. This narrative review highlights the role of rehabilitation and current developments in disaster rehabilitation; challenges and key future perspectives in this area.

      • KCI등재

        Identification of Inrush and Internal Fault in Indirect Symmetrical Phase Shift Transformer Using Wavelet Transform

        Shailendra Kumar Bhasker,Manoj Tripathy,Vishal Kumar 대한전기학회 2017 Journal of Electrical Engineering & Technology Vol.12 No.5

        This paper proposes an algorithm for the differential protection of an Indirect Symmetrical Phase Shift Transformer (ISPST) by considering the different behaviors of the compensated differential current under internal fault and magnetizing inrush conditions. In this algorithm, a criterion function is defined which is based on the difference of amplitude of the wavelet transformation over a specific frequency band. The function has been used for the discrimination between three phase magnetizing inrush and internal fault condition and requires less than a quarter cycle after disturbance. This method is independent of any coefficient or threshold values of wavelet transformation. The merit of this algorithm is demonstrated by the simulation of different faults in series and excitation unit and magnetizing inrush with varying switching conditions on ISPST using PSCAD/EMTDC. Due to unavailability of in-field large interconnected transformers for such a large number of destructive tests, the results are further verified by Real Time Digital Simulator (RSCAD/RTDS). The proposed algorithm has been compared with the conventional harmonic restraint based method that justifies the application of wavelet transform for differential protection of ISPST. The proposed algorithm has also been verified for different rating of ISPSTs and satisfactory results were obtained.

      • Head and neck extra nodal NHL (HNENL) - Treatment Outcome and Pattern of failure - A Single Institution Experience

        Giridhar, Prashanth,Mallick, Supriya,Bhasker, Suman,Pathy, Sushmita,Mohanti, Bidhu Kalyan,Biswas, Ahitagni,Sharma, Atul Asian Pacific Journal of Cancer Prevention 2015 Asian Pacific journal of cancer prevention Vol.16 No.15

        Background: Extra nodal lymphoma (ENL) constitutes about 33 % of all non-Hodgkin's lymphoma. 18-28% develops in the head and neck region. A multimodality treatment with multi-agent chemotherapy (CT) and radiotherapy (RT) is considered optimum. Materials and Methods: We retrieved the treatment charts of patients of HNENL treated in our institute from 2001-2012. The charts were reviewed and the demographic, treatment details and outcome of HNENL patients were retrieved using predesigned pro-forma. Results: We retrieved data of 75consecutive patients HNENL. Median age was 47years (Range: 8-76 years). Of the 75 patients 51 were male and 24 were female. 55patients were evaluable. The patient and tumor characteristics are summarized in Table 1. All patients were staged comprehensively with contrast enhanced computed tomography of head, neck, thorax, abdomen, pelvis and bone marrow aspiration and biopsy 66 patients received a combination multi-agent CT with CHOP being the commonest regimen. 42 patients received 4 or lesser number of cycles of chemotherapy whereas 24received more than 4 cycles chemotherapy. Post radiotherapy, 41 out of 42 patients had a complete response at 3 months. Only 21patients had a complete response after chemotherapy. All patients received radiation (mostly involved field radiation) as a part of the treatment. The median radiation dose was 45 Gray (Range: 36 Gray-50 Gray). The radiation was planned by 2D fluoro simulation based technique in 37cases and by 3 Dimensional conformal radiation therapy (3DCRT) in 36 cases. Two patients were planned by the intensity modulated radiation therapy (IMRT) technique. IMRT was planned for one thyroid and one nasal cavity primary. 5 patients experienced relapse after a median follow up of 19 months. The median survival was not reached. The estimated two and three year survival were 92.9% (95%CI- 68.6- 95.35) and 88% (95%CI- 60.82 - 92.66) respectively. Univariate analysis revealed higher stage and poorer baseline performance status to be significantly associated with worse progression free survival. 5 patients progressed (relapse or primary disease progression) after treatment. Of the 5 patients, two patients were primary orbital NHL, two patients had NHL nasal cavity and one was NHL thyroid. Conclusions: Combined modality treatment in HNENL confers excellent disease control with acceptable side effects.

      • KCI등재

        Potential opportunities to reduce cervical cancer by addressing risk factors other than HPV

        Ramaiah Vinay Kumar,Suman Bhasker 대한부인종양학회 2013 Journal of Gynecologic Oncology Vol.24 No.4

        Cervical cancer is the most common cancer in developing world and 80% of global burden is reported from these nations. Human papillomavirus along with poverty, illiteracy/lower education level and standards, multi-parity, tobacco, malnutrition and poor genital hygiene may act synergistically to cause cervical cancer. Risk factor of cervical cancer may in itself be the reason for non-viability of cervical cancer vaccine program in this part of the world. Interventions to address these risk factors in addition to vaccination of girls before their sexual debut may hold promises of reducing the morbidity and mortality of female genital cancers.

      • Outcome of Surgery and Post-Operative Radiotherapy for Major Salivary Gland Carcinoma: Ten Year Experience from a Single Institute

        Kaur, Jaspreet,Goyal, Shikha,Muzumder, Sandeep,Bhasker, Suman,Mohanti, Bidhu Kalyan,Rath, Goura Kishore Asian Pacific Journal of Cancer Prevention 2014 Asian Pacific journal of cancer prevention Vol.15 No.19

        Aims: To determine the clinical characteristics, pathological features, local and distant failure patterns in patients with carcinoma of major salivary glands treated with surgery and postoperative radiotherapy (PORT). Materials and Methods: We retrospectively reviewed 106 cases of major salivary gland tumor seen at our centre (1998-2008). Sixty five cases of major salivary gland carcinoma were selected for analysis (exclusions: benign, palliative, non-carcinomas). The patient population treated by surgery and PORT was divided into two groups: 1) Patients who underwent surgery and immediate PORT (Primary PORT); 2) Patients with recurrent carcinoma who underwent at least two surgeries and received PORT in the immediate post-operative period of the last performed surgery (Recurrent PORT). Recurrence free survival (RFS) was assessed using the Kaplan-Meier method. Results: Median age was 35 years with a male: female ratio of 1.3:1. The majority of cancers were located in the parotid gland (86.2%) and the most common histology was mucoepidermoid carcinoma (43%). Thirty nine cases (60%) were primary while 26 (40%) were recurrent. Optimal surgery was performed in 59/65 patients (90.8%). 43 patients (66.2%) underwent neck dissection, of which 14 (32.5%) had nodal metastasis. Overall, 61 (93.8%) patients complied with the prescribed radiotherapy. Median dose of PORT was 60 Gy. Median follow-up was 13.1 months (range 2-70). Relapse free survival was 50.4% at 60 months. Some 12 cases (18.5%) recurred with a median time to recurrence of 16.9 months. Conclusions: Surgery and PORT is an effective treatment for major salivary gland carcinoma with over 90% compliance and <20% recurrence. Early treatment with postoperative radiotherapy may increase the survival rate in major salivary gland carcinoma patients.

      • KCI등재

        The effect of carbon nanotubes (CNT) on thermoelectric properties of lead telluride (PbTe) nanocubes

        B. Khasimsaheb,Niraj Kumar Singh,Sivaiah Bathula,Bhasker Gahtori,D. Haranath,S. Neeleshwar 한국물리학회 2017 Current Applied Physics Vol.17 No.2

        We report the thermoelectric properties of different weight percentage of carbon nano tubes (CNT) dispersed (0.025, 0.05 and 0.1%) in PbTe nanocubes matrix. The sample with 0.05% CNT distribution in the PbTe matrix significantly enhanced the electrical conductivity, and Seebeck coefficient above 450 K. In this system CNT’s acting as a low energy filter at potential barrier and good passage for high energy electron which may cause enhance the electrical conductivity. Mixing of CNT into PbTe nanocubes created numerous additional interfaces which are acted as scattering centers for phonons and thus resulted in ultra low thermal conductivity of 0.24 and 0.32 W/m K at 525 K for 0.025 and 0.05% CNT dispersed PbTe matrix, respectively. An optimum quantity of CNT addition to PbTe enhanced the zT ~0.11 at 525 K for both 0.025 and 0.05% CNT dispersed PbTe matrix, respectively, which is 90% higher in comparison to PbTe nanocubes. Finally, CNT’s dispersed PbTe nanocomposite exhibited good thermoelectric compatibility factor and these materials are good candidate materials for segmentation to get maximum power output during power generation applications.

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