996 results on '"Raj M."'
Search Results
2. Interventions to Reduce Surgical Waste Burden: A Systematic Review
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Cindy Vu, BS, Alejandra Ibarra-Vega, BS, Christopher D. Yang, BS, Karlos Manzanarez-Felix, BS, Caleb L. Ting, BS, Mikhail Pakvasa, MD, Raj M. Vyas, MD, and Miles J. Pfaff, MD, MHS
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Surgery ,RD1-811 - Abstract
Background:. Operating suites are significant drivers of waste, pollution, and costs. Surgeons can help fight the climate crisis by implementing innovative strategies aimed at mitigating the environmental impact of surgical procedures and decreasing operational costs, and moving toward a more sustainable healthcare system. This study aims to review the literature describing interventions that reduce surgical waste. Methods:. PubMed, Cochrane, and Embase were searched. Studies reporting interventions to reduce operative waste, including emissions, energy, trash, and other, were included. Case reports, opinion-based reports, reviews, and meta-analyses were excluded. Study quality was rated using MINORS and Jadad scales. Data were extracted from each study to calculate waste on a per case basis. Narrative review of studies was performed rather than meta-analysis. Results:. The search yielded 675 unique hits, of which 13 (level of evidence: I–III) met inclusion criteria. Included studies were categorized by intervention type in relation to the operating and procedure room. Three studies evaluated provider education initiatives, three evaluated setup of instruments, two evaluated single-use items, four evaluated technique changes, and one evaluated surgical venue. Seven studies reported significant reductions in disposable surgical waste throughput, and seven reported significant reductions in cost. Conclusions:. The results of this systemic review demonstrated the effectiveness of surgical waste reduction initiatives in reducing waste volume, cost, and carbon emissions. Within plastic surgery, minimal surgical packs resulted in reduced gross waste and cost while promoting patient satisfaction in hand surgery, supporting the continued development and implementation of such initiatives in a surgical context.
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- 2024
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3. Free Text as Part of Electronic Health Record Orders: Context or Concern?
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Sadaf Kazi, Jessica L. Handley, Arianna P. Milicia, Raj M. Ratwani, Katharine T. Adams, Rebecca Jones, and Seth Krevat
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Medicine - Abstract
# Background When placing orders into the electronic health record (EHR), prescribers often use free-text information to complement the order. However, the use of these free-text fields can result in patient safety issues. The objective of our study was to develop a deeper understanding of the conditions under which free-text information, or special instructions, are used in the EHR and the patient safety issues associated with their use, through an analysis of patient safety event (PSE) reports. # Methods We identified 847 PSE reports submitted to the Pennsylvania Patient Safety Reporting System (PA-PSRS) between January 1, 2021, and December 31, 2022; this dataset was reduced to 677 after controlling for oversampling from particular facilities. After limiting to reports that mentioned the terms "special instructions," "order instructions," "order comments," or "special comments," we analyzed a total of 329 reports. A physician and human factors expert independently reviewed the reports and assigned each a code from the following categories: general care process, medication class, information expressed in the special instruction, special instruction issue, department or staff for which special instruction was intended, and whether the error reached the patient. # Results Almost three quarters of the special instruction reports were related to Medication (n=233 of 329, 70.8%), followed by Laboratory/Blood Bank (n=54, 16.4%), and Radiology (n=23, 7.0%). Medication classes most frequently associated with special instructions included infectious disease medications (n=51 of 230, 22.2%), antithrombotic/antithrombotic reversal agents (n=32, 13.9%), and nutritional/electrolytes/intravenous fluids (n=32, 13.9%). Nearly one quarter each of medication-related special instructions were about timing (n=58 of 233, 24.9%) and dosing (n=54, 23.2%); most about laboratory/blood bank were related to the site of the blood draw (n=33 of 54, 61.1%), and many involving radiology were related to radiology/echocardiography instructions (n=16 of 23, 69.6%). The most frequent issues associated with special instructions were containing information contradictory to the order or other information (n=62 of 329, 18.8%); being confusing, incorrect, or used incorrectly (n=58, 17.6%); and not seen (n=25, 7.6%), not viewable (n=11, 3.3%), or instructions absent (n=11, 3.3%). In more than half of the reports, special instructions were intended for nursing staff (n=184 of 329, 55.9%), followed by pharmacy (n=49, 14.9%), radiology (n=21, 6.4%), and laboratory/blood bank (n=20, 6.1%). The error reached the patient in roughly three quarters (n=243 of 329, 73.9%) of the reports reviewed. # Conclusion Special instructions are frequently used to provide additional context about medication orders and laboratory and radiology procedures and are often intended for nurses and pharmacists. However, these instructions can result in errors and may cause patient harm. Based on our analysis, we provide EHR design strategies and policies and protocols to address patient safety issues associated with free text to enable safer and more resilient care delivery.
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- 2024
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4. Unmasking the Contributing Factors to Oxygen Disruption Events in the Inpatient Environment and Emergency Department
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Lucy S. Bocknek, Deanna-Nicole C. Busog, Raj M. Ratwani, Jessica L. Handley, Katharine T. Adams, Rebecca Jones, and Seth Krevat
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Medicine - Abstract
# Background Medical oxygen is frequently used in healthcare settings. Challenges with oxygen disruption, such as oxygen tanks running out due to communication issues between staff or tanks not being set up properly, have been noted in the limited existing literature. Challenges and patient safety issues associated with oxygen disruption persist. Utilizing a human factors approach, our study aims to understand the contributing factors and context of oxygen disruption--related patient safety event reports in the inpatient setting and provide person-based and system-based solutions. # Methods Through keyword matching, we identified and then qualitatively analyzed 298 patient safety event reports to understand the factors contributing to oxygen disruption, patient location when the oxygen disruptions occurred, hand-off breakdowns by healthcare team member role, and whether high supplemental oxygen was being administered. # Results The most frequent contributing factor to oxygen disruption was the patient not being transferred to another source of oxygen (n=135 of 298, 45.3%), followed by tank found empty (n=107, 35.9%), patient connected to a functioning oxygen source, no oxygen flowing (n=25, 8.4%), oxygen delivery device malfunction (n=22, 7.4%), and no oxygen available (n=9, 3.0%). Over one-third of all oxygen disruption events occurred on the unit where the patient was admitted (n=109 of 298, 36.6%). Roughly 40% of reports involved a hand-off breakdown (n=123 of 298, 41.3%) and the most frequent breakdowns occurred between a nurse and a patient transporter (n=47 of 123, 38.2%). Almost one quarter of reports involved a patient with high supplemental oxygen requirements (n=74 of 298, 24.8%). # Conclusion Oxygen disruption events can have serious patient safety implications. Many of the oxygen disruption events we reviewed occurred due to lack of situational awareness and hand-off breakdowns. Combining person-based solutions, such as paper-based tools and checklists, with system-based solutions involving central monitoring and supervisory systems may help reduce the risk of oxygen disruption events.
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- 2024
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5. Intelligent solar photovoltaic power forecasting
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Keaobaka D. Poti, Raj M. Naidoo, Nsilulu T. Mbungu, and Ramesh C. Bansal
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Commercial sectors ,Demand management ,Forecasting ,Optimization ,PV power plants ,System planning ,Electrical engineering. Electronics. Nuclear engineering ,TK1-9971 - Abstract
This paper presents a day-ahead forecasting method for photovoltaic (PV) power plants in commercial sectors. The method is based on numerical weather prediction (NWP) models from open weather maps and power plant specifications. The output of the model is the predicted power output from the PV power plant, which is incorporated into an optimal control strategy of the PV plant using battery storage. The use of optimal algorithms assists in the PV power plant curtailment in cases of over-generation and reduces the dependence on conventional power sources such as generators in cases of under-generation by the PV plant. It was found that most forecasting methods do not incorporate PV power and storage systems for proper optimization and demand management. This can be seen as a gap for further research of forecasting models integrated with battery storage systems to improve PV power system performance. Results obtained show a good performance of the developed model. A root means square error (RMSE) of 425.79 W and 595.10 W and a mean absolute error (MAE) of 246.26 W and 238 W were achieved for a summer and winter day, respectively. Furthermore, an excellent positive correlation exists between the predicted output power and the observed results, with R2 values over 90%.
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- 2023
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6. A text mining approach to categorize patient safety event reports by medication error type
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Christian Boxley, Mari Fujimoto, Raj M. Ratwani, and Allan Fong
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Medicine ,Science - Abstract
Abstract Patient safety reporting systems give healthcare provider staff the ability to report medication related safety events and errors; however, many of these reports go unanalyzed and safety hazards go undetected. The objective of this study is to examine whether natural language processing can be used to better categorize medication related patient safety event reports. 3,861 medication related patient safety event reports that were previously annotated using a consolidated medication error taxonomy were used to develop three models using the following algorithms: (1) logistic regression, (2) elastic net, and (3) XGBoost. After development, models were tested, and model performance was analyzed. We found the XGBoost model performed best across all medication error categories. ‘Wrong Drug’, ‘Wrong Dosage Form or Technique or Route’, and ‘Improper Dose/Dose Omission’ categories performed best across the three models. In addition, we identified five words most closely associated with each medication error category and which medication error categories were most likely to co-occur. Machine learning techniques offer a semi-automated method for identifying specific medication error types from the free text of patient safety event reports. These algorithms have the potential to improve the categorization of medication related patient safety event reports which may lead to better identification of important medication safety patterns and trends.
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- 2023
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7. Plastic Surgery or Facial Plastic Surgery: Can the Public Tell the Difference?
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Rachel E. Pyon, MD, Lohrasb R. Sayadi, MD, Mikhail Pakvasa, MD, Raj M. Vyas, MD, and Eric D. Wang, MD
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Surgery ,RD1-811 - Abstract
Background:. Social media and online advertising are increasingly used by plastic surgeons (PSs) to educate patients and obtain referrals, but it remains unclear whether the general public can distinguish the difference in training and accreditation among medical professionals advertising online. Our study elucidates the public’s expectations regarding the distinction between plastic surgery and facial plastic surgery. Methods:. A survey was distributed via MTurk, an Amazon surveying service, to collect information about demographics and assumptions that would be made solely based on the terminology “facial PS” (FPS) and “PS.” Participants were restricted to those residing in the United States. Results:. A total of 253 responses were collected. Based on the term FPS, respondents on average moderately to strongly agreed that they would expect an FPS to have completed a plastic and reconstructive surgery residency program (mean = 1.81; scale from 1= strongly agree to 5= strongly disagree) and would feel moderately to strongly misled if they visited an FPS for a consultation and later learned that the provider did not complete a plastic and reconstructive surgery residency (mean = 3.62; scale from 1 = not misled at all to 5 = extremely misled). Conclusions:. Despite increasing advocacy by professional societies and the member societies of the American Board of Medical Specialties, this study demonstrated that the lay public is unaware of factually different training and certification pathways given similarity in nomenclature. This study was notably not designed to draw conclusions or imply superiority of one specialty, certifying board, or training model over the other.
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- 2024
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8. Results of a Pilot Virtual Microsurgery Course for Plastic Surgeons in LMICs
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Greta L. Davis, MD, Metasebia W. Abebe, MD, FC (ECSA), MPH, Raj M. Vyas, MD, Christine H. Rohde, MD, MPH, Michelle R. Coriddi, MD, Andrea L. Pusic, MD, and Amanda A. Gosman, MD
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Surgery ,RD1-811 - Abstract
Background:. The Plastic Surgery Foundation’s Surgeons in Humanitarian Alliance for Reconstruction, Research and Education (SHARE) program seeks to expand surgical capacity worldwide through mentorship and training for local plastic surgeons. This study aims to define the need for microsurgery training among SHARE global fellows and describe results of a pilot course. Methods:. Ten participants of the SHARE Virtual Microsurgical Skills Course were asked to complete an anonymous survey. Pre- and post-course response rates were 100% and 50.0%, respectively. Results:. There was a high incidence of microsurgical problems encountered in the clinical setting. Resource availability was varied, with high access to loupes (100%), yet limited access to microsurgery instruments (50%), medications (40%), operating microscope (20%), skilled nursing (0%) and appropriate peri-operative care settings (0%). Participants identified vessel preparation, instrument selection, and suture handling as priority learning objectives for a microsurgery skills course. Post-course satisfaction with learning objectives was high (60% “very good,” 40% “excellent”). Participants reported high levels of improvement in suture handling (Likert 4.60±0.55), end-to-end anastomosis (4.40±0.55), instrument selection (4.20±0.45), vessel preparation (4.20±0.45), and economy of motion (4.20±0.45). Conclusions:. This study demonstrates a high frequency of reconstructive problems encountered by global fellows yet low access to appropriate resources to perform microsurgical procedures. Initial results from a pilot virtual microsurgery course demonstrate very high satisfaction and high self-rated improvement in key microsurgical skills. The virtual course is an effective and accessible format for training surgeons in basic microsurgery skills and can be augmented by providing longitudinal opportunities for remote feedback.
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- 2024
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9. Validation of ChatGPT 3.5 as a Tool to Optimize Readability of Patient-facing Craniofacial Education Materials
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Medha Vallurupalli, BA, Nikhil D. Shah, MD, and Raj M. Vyas, MD, FACS
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Surgery ,RD1-811 - Abstract
Background:. To address patient health literacy, the American Medical Association recommends that readability of patient education materials should not exceed a sixth grade reading level; the National Institutes of Health recommend no greater than an eigth-grade reading level. However, patient-facing materials in plastic surgery often remain at an above-recommended average reading level. The purpose of this study was to evaluate ChatGPT 3.5 as a tool for optimizing patient-facing craniofacial education materials. Methods:. Eighteen patient-facing craniofacial education materials were evaluated for readability by a traditional calculator and ChatGPT 3.5. The resulting scores were compared. The original excerpts were then inputted to ChatGPT 3.5 and simplified by the artificial intelligence tool. The simplified excerpts were scored by the calculators. Results:. The difference in scores for the original excerpts between the online calculator and ChatGPT 3.5 were not significant (P = 0.441). Additionally, the simplified excerpts’ scores were significantly lower than the originals (P
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- 2024
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10. Comparing five equations to calculate estimated glomerular filtration rate to predict acute kidney injury following total joint arthroplasty
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Kevin L. Mekkawy, Yash P. Chaudhry, Sandesh S. Rao, Micheal Raad, Raj M. Amin, and Harpal S. Khanuja
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Total joint arthroplasty ,Estimated glomerular filtration rate ,Ecute kidney injury ,Orthopedic surgery ,RD701-811 - Abstract
Abstract Background Acute kidney injury (AKI) following total joint arthroplasty (TJA) is associated with increased morbidity and mortality. Estimated glomerular filtration rate (eGFR) is used as an indicator of renal function. The purpose of this study was (1) to assess each of the five equations that are used in calculating eGFR, and (2) to evaluate which equation may best predict AKI in patients following TJA. Methods The National Surgical Quality Improvement Program (NSQIP) was queried for all 497,261 cases of TJA performed from 2012 to 2019 with complete data. The Modification of Diet in Renal Disease (MDRD) II, re-expressed MDRD II, Cockcroft-Gault, Mayo quadratic, and Chronic Kidney Disease Epidemiology Collaboration equations were used to calculate preoperative eGFR. Two cohorts were created based on the development of postoperative AKI and were compared based on demographic and preoperative factors. Multivariate regression analysis was used to assess for independent associations between preoperative eGFR and postoperative renal failure for each equation. The Akaike information criterion (AIC) was used to evaluate predictive ability of the five equations. Results Seven hundred seventy-seven (0.16%) patients experienced AKI after TJA. The Cockcroft-Gault equation yielded the highest mean eGFR (98.6 ± 32.7), while the Re-expressed MDRD II equation yielded the lowest mean eGFR (75.1 ± 28.8). Multivariate regression analysis demonstrated that a decrease in preoperative eGFR was independently associated with an increased risk of developing postoperative AKI in all five equations. The AIC was the lowest in the Mayo equation. Conclusions Preoperative decrease in eGFR was independently associated with increased risk of postoperative AKI in all five equations. The Mayo equation was most predictive of the development of postoperative AKI following TJA. The mayo equation best identified patients with the highest risk of postoperative AKI, which may help providers make decisions on perioperative management in these patients.
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- 2023
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11. Are They Aligned? An Analysis of Social Media-Based Nurse Well-Being Concerns and Well-Being Programs
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Arianna P. Milicia, Jessica L. Handley, Christian L. Boxley, Deanna-Nicole C. Busog, Seth Krevat, Nate Apathy, Daniel Marchalik, Raj M. Ratwani, and Ella S. Franklin
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Medicine - Abstract
# Background Nurse burnout and distress pose patient safety risks due to impaired nurse attention, increased likelihood of medical error, and increased nurse turnover leading to a reduction in the number of nurses available to deliver care. Some healthcare facilities have launched well-being programs in response to increasing rates of burnout. Many of these programs are based on survey data which may be incomplete, resulting in programs that are not as comprehensive as they should be. We sought to identify nurse concerns related to burnout and well-being through analysis of social media data. We aligned these concerns with well-being program leader perceptions of factors contributing to burnout and well-being program initiatives. # Methods We conducted a qualitative study composed of two parts: social media analysis and semistructured interviews with well-being leaders. The social media analysis focused on 120 nurse comments on Reddit that were retrieved based on a keyword search using the terms "burnout," "stress," and "wellbeing." The interviews were conducted with nine well-being leaders from seven different healthcare systems. Well-being program leaders were asked about factors contributing to burnout and lack of well-being, initiatives to address these factors, and metrics used to evaluate their programs. The social media comments and interview data were reviewed by two experts to identify topics, themes, and subthemes grounded in wellness models. # Results Of the 120 social media comments analyzed, the most frequent topic was Lack of Meaningful Recognition, Compensation, and Influence (n=46 of 120, 38.3%), followed by Work Environment (n=43, 35.8%) and Uninformed or Misinformed Public (n=31, 25.8%). Several themes emerged and the most prevalent was Constrained Professional Agency with the most prevalent subtheme of health system or macrosystem policies or regulations that limit nurses' ability to respond effectively to patient care needs. Of the seven healthcare systems interviewed, the most common topics that emerged from asking about the factors contributing to the lack of nurse well-being were the Work Environment (n=6 of 7, 85.7%), followed by Lack of Meaningful Recognition, Compensation, and Influence (n=4, 57.1%), and Inadequate or Inaccessible Well-Being Resources (n=3, 42.9%). Several novel initiatives were identified, and most healthcare systems relied on surveys as their key metric. # Conclusions The social media analysis revealed nurse concerns that may not be identified as factors contributing to lack of well-being by well-being program leaders. There is an opportunity to optimize our understanding of nurse concerns around well-being through social media, and an opportunity to better align nurse concerns with the focus of well-being programs.
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- 2023
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12. Vascularized Fibular Epiphyseal Transfer for Pediatric Limb Salvage: Review of Applications and Outcomes
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Christine J. Lee, MD, Ekaterina Tiourin, MD, Nima Khoshab, MD, Amber R. Leis, MD, FACS, Nader A. Nassif, MD, Amir Misaghi, MD, and Raj M. Vyas, MD, FACS
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Surgery ,RD1-811 - Abstract
Summary:. Vascularized fibular epiphyseal transfer (VFET) offers a functional advantage in pediatric limb salvage due to the preservation of growth potential and an articular surface for remodeling. This review summarizes the available evidence on the clinical characteristics and outcomes of pediatric reconstruction applying VFET at different recipient sites and with varying techniques. VFET was used to reconstruct the proximal humerus, distal radius or ulna, proximal femur, distal fibula, calcaneus, and mandible. Although most often harvested on the anterior tibial artery, VFET has also been performed using the peroneal artery, the inferior lateral genicular artery, and a dual pedicle. Recipient site flap inset most often involved fixation with plates and/or screws as well as soft tissue reconstruction using a retained slip of biceps femoris tendon. Outcomes included limb growth, range of motion, and strength. The most common reported complications were bone flap fracture and peroneal nerve palsy. The anterior tibial artery was the most applied pedicle with reliable limb growth, but with the added risk of postoperative peroneal palsy. Bone flap fracture most often occurred at the proximal humerus and femur recipient sites. Plate fixation and the combined use of allograft had lower instances of bone flap fracture. This review highlights how the anticipated dynamic growth and remodeling this free flap offers in the long term must be weighed against its complexity and potential complications.
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- 2023
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13. Distribution of renewable energy through the energy internet: A routing algorithm for energy routers
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Dijo P. Koottappillil, Raj M. Naidoo, Nsilulu T. Mbungu, and Ramesh C. Bansal
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Distributed power generation ,Internet of energy ,Internet of things ,Renewable energy ,Smart grid ,Electrical engineering. Electronics. Nuclear engineering ,TK1-9971 - Abstract
Fossil fuels are rapidly running out, and with the demand for environmentally friendly energy sources increasing, power grids are looking for distributed power generation-based renewable resources. The distribution of these energy sources is significantly linked to the development of smart microgrids, which are also extensively connected with the energy internet. This paper explores the energy internet operation, focusing on developing a routing algorithm for an energy router. The energy routing algorithm is further substantiated with the aid of simulations. This algorithm can find all the paths available for energy transmission between two nodes and selects the track with the most negligible losses as the path for transmission. All the possible routes are displayed along with the losses associated with each direction to ensure that the approach with the lowest losses is taken. The algorithm is also tested for 24 h at an hourly interval to observe the change in power transmitted on the system.
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- 2022
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14. Effective Local Anesthetic Use in Nasal Surgery: A Systematic Review and Meta-analysis of Randomized Controlled Studies
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Leonardo Alaniz, BBA, Cindy Vu, BS, Jagmeet Arora, BS, Avril Stulginski, BS, Xiao Zhu, MD, Justin Cordero, BS, Raj M. Vyas, MD, and Miles J. Pfaff, MD, MHS
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Surgery ,RD1-811 - Abstract
Background:. Intraoperative nerve blocks have shown promise in managing pain after nasal surgery. The purpose of this systematic review and meta-analysis was to analyze existing level I and II evidence on intraoperative nerve blocks in nasal surgery to optimize postoperative recovery. Methods:. The primary outcome of this systematic review and meta-analysis was postoperative pain scores; secondary outcomes included perioperative opioid requirements, patient satisfaction scores, and time to first analgesic requirement. PubMed, Embase, and MEDLINE databases were searched, and two independent reviewers conducted article screening. Methodological quality assessment of studies utilized the Jadad instrument, and interrater reliability was assessed using Cohen kappa. An inverse-variance, fixed-effects model was used for meta-analysis with Cohen d used to normalize effect size between studies. I2 and Q statistics were used to assess interstudy variability. Results:. Four studies were included for meta-analysis, totaling 265 randomized patients. The nerve blocks assessed included infraorbital nerve, sphenopalatine ganglion, external nasal nerve, central facial nerve blocks, and total nerve blocks. All demonstrated significantly reduced postoperative pain compared with controls, with a large effect size (P < 0.001). Opioid requirements were lower in the nerve block groups (P < 0.001), and patient satisfaction scores were higher (P < 0.001). Supplemental meta-analyses showed a longer time to first analgesic requirement for patients who received a nerve block (P < 0.001). Conclusions:. These findings support the efficacy of nerve blocks in providing postoperative pain relief and enhancing patient satisfaction with pain management. Perioperative nerve blocks, in combination with general anesthesia, should be considered for postoperative pain control.
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- 2023
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15. Online Supplement to 'Informing Visual Display Design of Electronic Health Records: A Human Factors Cross-Industry Perspective'
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Zoe M. Pruitt, Jessica L. Howe, Lucy S. Bocknek, Arianna P. Milicia, Patricia A. Spaar, Seth Krevat, and Raj M. Ratwani
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Medicine - Abstract
This supplementary material has been provided by the authors to give readers additional information about their work.
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- 2023
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16. Informing Visual Display Design of Electronic Health Records: A Human Factors Cross-Industry Perspective
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Zoe M. Pruitt, Jessica L. Howe, Lucy S. Bocknek, Arianna P. Milicia, Patricia A. Spaar, Seth Krevat, and Raj M. Ratwani
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Medicine - Abstract
# Background Despite their prevalence, poorly designed electronic health records (EHRs) are common, and research shows poor design consequences include clinician burnout, diagnostic error, and even patient harm. One of the major difficulties of EHR design is the visual display of information, which aims to present information in an easily digestible form for the user. High-risk industries like aviation, automotive, and nuclear have guidelines for visual displays based on human factors principles for optimized design. # Purpose In this study, we reviewed the visual display guidelines from three high-risk industries—automotive, aviation, nuclear—for their applicability to EHR design and safety. # Methods Human factors experts extracted guidelines related to visual displays from automotive, aviation, and nuclear human factors guideline documents. Human factors experts and a clinical expert excluded guidelines irrelevant to EHR. Human factors experts used a modified reflexive thematic analysis to group guidelines into meaningful topics. Disagreements were discussed until a consensus was reached. # Results A total of 449 guidelines were extracted from the industry documents, and 283 (63.0%) were deemed relevant to EHRs. By industry, 12 of 44 (27.3%) automotive industry guidelines were relevant, 43 of 115 (37.4%) aviation industry guidelines were relevant, and 228 of 290 (78.6%) nuclear industry guidelines were relevant. Guidelines were grouped into six categories: alphanumeric; color, brightness, contrast, and luminance; comprehension; design characteristics; symbols, pictograms, and icons; and tables, figures, charts, and lists. # Conclusion Our analysis identified visual display guidelines organized around six topics from the automotive, aviation, and nuclear industries to inform EHR design. Multiple stakeholders, including EHR vendors, healthcare facilities, and policymakers, can apply these guidelines to design new EHRs and optimize EHRs already in use.
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- 2023
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17. Asymmetry at Low Surface Brightness as an Indicator of Environmental Processes in the Fornax Cluster
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Xu, X., Peletier, R. F., Awad, P., Raj, M. A., and Smith, R.
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Astrophysics - Astrophysics of Galaxies - Abstract
Dwarf galaxies play an important role in studying the effects of the environment on galaxy formation and evolution. In this study, we aim to explore the relationship between the morphology, in particular the asymmetries of galaxies, and their distances to the cluster centre. For galaxies in the Fornax Deep Survey, we quantified the morphologies of dwarf galaxies using Asymmetry (A) and Smoothness (S). Unlike previous work, we use isophotal CAS-parameters, which are sensitive to the outer parts of galaxies. We constructed the A-r and S-r diagrams to investigate the relationship between morphology and distance. Additionally, we examined the effects of asymmetry on magnitude and colour. Furthermore, to better understand the assembly history of the galaxy cluster, we performed a phase-space analysis for Fornax dwarf galaxies. We find that dwarf galaxies in the outer regions of the Fornax cluster have higher values of asymmetry compared to other dwarfs in the cluster, indicating a greater degree of morphological disturbances within dwarf galaxies in these regions. We also find that galaxies in the very inner regions are more asymmetric than those further out. The A-magnitude relation reveals a trend where asymmetry increases as galaxies become fainter, and the A-colour relation shows that galaxies with bluer colours tend to exhibit higher asymmetry. We do not find any correlations with smoothness, except that smoothness strongly decreases with stellar mass. We propose that the higher asymmetry of dwarfs in the outer regions is most likely caused by ram pressure stripping. In the very inner parts, the asymmetries most likely are caused by tidal effects. In addition, our phase-space diagram suggests that galaxies near pericentre in the Fornax cluster exhibit significantly higher asymmetry, indicating that morphological disturbances happened during their first pericentric passage.
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- 2025
18. Assessing Equipment, Supplies, and Devices for Patient Safety Issues
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Raj M. Ratwani, Katharine T. Adams, Tracy C. Kim, Deanna-Nicole C. Busog, Jessica L. Howe, Rebecca Jones, and Seth Krevat
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Medicine - Abstract
# Background Medical equipment, supplies, and devices (ESD) serve a critical function in healthcare delivery and how they function can have patient safety consequences. ESD-related safety issues include malfunctions, physically missing ESDs, sterilization, and usability. Describing ESD-related safety issues from a human factors perspective that focuses on user interactions with ESDs can provide additional insights to address these issues. # Methods We manually reviewed ESD patient safety event reports submitted to the Pennsylvania Patient Safety Reporting System to identify ESD-related safety issues using a taxonomy that was informed by the Food and Drug Administration Manufacturer and User Facility Device Experience taxonomy. This taxonomy consisted of the following high-level categories: malfunctions, physically missing, sterilization, and usability. The type of ESD and associated components or ESD subtypes, event classification, and care area group were noted for each report. # Results Of the 450 reports reviewed, the most frequent ESD-related safety issue coded was malfunction (n=365 of 450, 81.1%) followed by sterilization (n=40 of 450, 8.9%), usability (n=36 of 450, 8.0%), and physically missing (n=9 of 450, 2.0%). Among the coded malfunctions, software/output problem (n=122 of 365, 33.4%) was the most frequent, followed by general malfunction (n=103 of 365, 28.2%); material integrity (n=72 of 365, 19.7%); and activation, positioning, or separation (n=68 of 365, 18.6%). The most frequent ESDs noted were infusion pump, instrument set, and intravenous, and the most frequent components/subtypes noted were alarm/alert, tubing, and tray. # Conclusions ESD-related patient safety issues, especially malfunctions, impact patient care despite current policies and practices to address these issues. Healthcare facilities may be able to address some ESD-related patient safety issues during procurement through use of the accompanying procurement assessment tool.
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- 2023
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19. Informing Healthcare Alarm Design and Use: A Human Factors Cross-Industry Perspective
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Zoe M. Pruitt, Lucy S. Bocknek, Deanna-Nicole C. Busog, Patricia A. Spaar, Arianna P. Milicia, Jessica L. Howe, Ella S. Franklin, Seth Krevat, Rebecca Jones, and Raj M. Ratwani
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Medicine - Abstract
# Background Alarms are signals intended to capture and direct human attention to a potential issue that may require monitoring, assessment, or intervention and play a critical safety role in high-risk industries. Healthcare relies heavily on auditory and visual alarms. While there are some guidelines to inform alarm design and use, alarm fatigue and other alarm issues are challenges in the healthcare setting. Automotive, aviation, and nuclear industries have used the science of human factors to develop alarm design and use guidelines. These guidelines may provide important insights for advancing patient safety in healthcare. # Methods We identified documents containing alarm design and use guidelines from the automotive, aviation, and nuclear industries that have been endorsed by oversight agencies. These guidelines were reviewed by human factors and clinical experts to identify those most relevant to healthcare, qualitatively analyze the relevant guidelines to identify meaningful topics, synthesize the guidelines under each topic to identify key commonalities and differences, and describe how the guidelines might be considered by healthcare stakeholders to improve alarm design and use. # Results A total of 356 guidelines were extracted from industry documents (2012–present) and 327 (91.9%) were deemed relevant to healthcare. A qualitative analysis of relevant guidelines resulted in nine distinct topics: Alarm Reduction, Appropriateness, Context-Dependence, Design Characteristics, Mental Model, Prioritization, Specificity, Urgency, and User Control. There were several commonalities, as well as some differences, across industry guidelines. The guidelines under each topic were found to inform the auditory or visual modality, or both. Certain guidelines have clear considerations for healthcare stakeholders, especially technology developers and healthcare facilities. # Conclusion Numerous guidelines from other high-risk industries can inform alarm design and use in healthcare. Healthcare facilities can use the information presented as a framework for working with their technology developers to appropriately design and modify alarming technologies and can evaluate their clinical environments to see how alarming technologies might be improved.
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- 2023
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20. The impact of expanded telehealth availability on primary care utilization
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Ram A. Dixit, Raj M. Ratwani, Jasmine A. Bishop, Kevin Schulman, Christopher Sharp, Kerry Palakanis, and Ethan Booker
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Computer applications to medicine. Medical informatics ,R858-859.7 - Abstract
Abstract The expanded availability of telehealth due to the COVID-19 pandemic presents a concern that telehealth may result in an unnecessary increase in utilization. We analyzed 4,114,651 primary care encounters (939,134 unique patients) from three healthcare systems between 2019 and 2021 and found little change in utilization as telehealth became widely available. Results suggest telehealth availability is not resulting in additional primary care visits and federal policies should support telehealth use.
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- 2022
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21. Duplicate Medication Order Errors: Safety Gaps and Recommendations for Improvement
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Lucy S. Bocknek, Tracy C. Kim, Patricia A. Spaar, Jacqueline L. Russell, Deanna-Nicole C. Busog, Jessica L. Howe, Christian L. Boxley, Raj M. Ratwani, Seth Krevat, Rebecca Jones, and Ella S. Franklin
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Medicine - Abstract
Background: Duplicate medication orders are a prominent type of medication error that in some circumstances has increased after implementation of health information technology. Duplicate medication orders are commonly defined as two or more active orders for the same medication or medications within the same therapeutic class. While there have been several studies that have identified contributing factors and described potential solutions, duplicate medication order errors continue to impact patient safety. Methods: We analyzed 377 reports from 95 healthcare facilities to more granularly define the types of duplicate medication order errors and the context under which these errors occurred, as well as potential contributing factors. Results: Of the 377 reports reviewed, 304 (80.6%) met the criteria to be defined as a duplicate medication order error. The most frequent duplicate medication order error type was same order (n=131, 43.1%), followed by same therapeutic class (n=98, 32.2%) and same medication (n=70, 23.0%). Errors were identified during different medication process tasks and most commonly during medication reconciliation during the patient’s stay in the hospital (n=72, 23.7%) and during pharmacy verification (n=36, 11.8%). Factors contributing to these errors included health information technology issues (n=63, 20.7%), gaps in care coordination (n=44, 14.5%), and a prior dose or medication order not being discontinued (n=52, 17.1%). Conclusion: Our results highlight specific areas for practice improvement, and we make recommendations for how healthcare facilities can better address duplicate medication order errors.
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- 2022
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22. Harnessing the Power of Artificial Intelligence to Teach Cleft Lip Surgery
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Lohrasb Ross Sayadi, MD, Usama S. Hamdan, MD, FICS, Qilong Zhangli, BS, and Raj M. Vyas, MD, FACS
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Surgery ,RD1-811 - Abstract
Background:. Artificial intelligence (AI) leverages today’s exceptional computational powers and algorithmic abilities to learn from large data sets and solve complex problems. The aim of this study was to construct an AI model that can intelligently and reliably recognize the anatomy of cleft lip and nasal deformity and automate placement of nasolabial markings that can guide surgical design. Methods:. We adopted the high-resolution net architecture, a recent family of convolutional neural networks–based deep learning architecture specialized in computer-vision tasks to train an AI model, which can detect and place the 21 cleft anthropometric points on cleft lip photographs and videos. The model was tested by calculating the Euclidean distance between hand-marked anthropometric points placed by an expert cleft surgeon to ones generated by our cleft AI model. A normalized mean error (NME) was calculated for each point. Results:. All NME values were between 0.029 and 0.055. The largest NME was for cleft-side cphi. The smallest NME value was for cleft-side alare. These errors were well within standard AI benchmarks. Conclusions:. We successfully developed an AI algorithm that can identify the 21 surgically important anatomic landmarks of the unilateral cleft lip. This model can be used alone or integrated with surface projection to guide various cleft lip/nose repairs. Having demonstrated the feasibility of creating such a model on the complex three-dimensional surface of the lip and nose, it is easy to envision expanding the use of AI models to understand all of human surface anatomy—the full territory and playground of plastic surgeons.
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- 2022
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23. Pediatric Dose Calculation Issues and the Need for Human Factors–Informed Preventative Technology Optimizations
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Jacqueline Russell, Joanna P. Grimes, Sofia Teferi, Zoe M. Pruitt, Jessica L. Howe, Katharine T. Adams, Natasha Nicol, Seth Krevat, Deanna Busog, Raj M. Ratwani, Rebecca Jones, and Ella S. Franklin
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Medicine - Abstract
Background: Dose calculation errors are one of the most common types of medication errors impacting children and they can result in significant harm. Technology-based solutions, such as computerized provider order entry, can effectively reduce dose calculation issues; however, these technologies are not always optimized, resulting in potential benefits not being fully realized. Methods: We analyzed pediatric dose-related patient safety event reports submitted to the Pennsylvania Patient Safety Reporting System using a task-analytic approach that focused on information being used in the dose calculation, calculation errors during ordering, and errors during dose preparation or administration. From these reports, we identified whether the patient was impacted by the error, the type of medication involved, and whether a technology optimization could have mitigated the issue. Results: Of the 356 reports reviewed, 326 (91.6%) met the criteria for a dose calculation issue. The 326 reports meeting criteria had the following dose calculation issue types: wrong information used in the calculation (49 of 326, 15.0%), incorrect calculation during ordering (97 of 326, 29.8%), and calculated dose was not properly used or incorrect calculation during preparation/administration (180 of 326, 55.2%). Most of these dose calculation issues impacted the patient (219 of 326, 67.2%). Analysis of these issues by patient age group and drug class also revealed interesting patterns. Technology optimizations potentially could have addressed 81.6% of the dose calculation issues identified. Conclusion: While many healthcare facilities have adopted health information technology and other devices to support the medication process, these technologies are not always optimized to address dose calculation issues. Human factors–informed recommendations, a safety checklist, and test cases for optimizing technology are provided in the context of these findings.
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- 2022
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24. Early Surgical Management of Infants with Robin Sequence in a Large Multi-center Sample
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Cory Resnick, S. Alex Rottgers, MD, Jordan W. Swanson, MD, MSc, Raj M. Vyas, MD, David Molter, Maithilee Menezes, Jeffrey Goldstein, MD, Michael A. Padula, Carl Coghill, and Christopher Cielo
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Surgery ,RD1-811 - Published
- 2022
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25. An efficient novel approach to E-commerce retail price optimization through machine learning
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Subbarayudu Yerragudipadu, Reddy G. Vijendar, Raj M. Vamsi Krishna, Uday K., Fasiuddin M.D., and Vishal P.
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Environmental sciences ,GE1-350 - Abstract
Businesses can use price optimization to discover the most profitable price point by using customer and market data to drive their decisions. The optimal price points will result in the company making the most money possible, but they may also be created to help the company expand into untapped markets or increase its market share, for example Businesses can use machine learning to price products and services to maximise sales or profitability by using data instead of educated guess-work. When utilised for price optimization, ML-based algorithms can be used to forecast demand for a particular product as well as the ideal price and how buyers will respond to specific pricing. Pricing decisions can be made more accurately using machine learning, which will boost a company's revenue.
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- 2023
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26. A new advent of exploring rGO/NiO@TiO2 ternary composites for efficient quasi-solid-state asymmetric supercapacitor
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Harini S., Anto Feradrick Samson V, Victor Antony Raj M, and Madhavan J
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- 2025
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27. A Rectangular Slotted Sierpinski Fractal Bowtie Antenna for Multiband Wireless Communications
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Ramalakshmi, G., Raj, M. Shilpa, Kacprzyk, Janusz, Series Editor, Gomide, Fernando, Advisory Editor, Kaynak, Okyay, Advisory Editor, Liu, Derong, Advisory Editor, Pedrycz, Witold, Advisory Editor, Polycarpou, Marios M., Advisory Editor, Rudas, Imre J., Advisory Editor, Wang, Jun, Advisory Editor, Das, Asit Kumar, editor, Nayak, Janmenjoy, editor, Naik, Bighnaraj, editor, Himabindu, M., editor, Vimal, S., editor, and Pelusi, Danilo, editor
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- 2025
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28. Attitude and Knowledge Towards Sexual Education and Its Influence on the Mental Health of Higher Secondary School Students in Theni District, Tamil Nadu
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Raj, M. Maria Antony, Mani, Suma, and Pant, Naveen, editor
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- 2025
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29. Effects of Menopause on Life Satisfaction Among Women in the Madurai District, Tamil Nadu
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Simona, D., Rani, S., Maria Antony Raj, M., and Pant, Naveen, editor
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- 2025
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30. Exploring the Development of Diversity Initiatives: Workplace Diversity, Leadership, and Enterprise Performance Management Within the Manufacturing Sector
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Mohan Kumar, R., Radha, P., Mathew, Geethu Anna, Sebastian, Roshen Therese, Sugin Raj, M., Naveen Kumar, R., Kacprzyk, Janusz, Series Editor, Novikov, Dmitry A., Editorial Board Member, Shi, Peng, Editorial Board Member, Cao, Jinde, Editorial Board Member, Polycarpou, Marios, Editorial Board Member, Pedrycz, Witold, Editorial Board Member, Hamdan, Allam, editor, and Braendle, Udo, editor
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- 2025
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31. Euclid preparation. LVIII. Detecting globular clusters in the Euclid survey
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Euclid Collaboration, Voggel, K., Lançon, A., Saifollahi, T., Larsen, S. S., Cantiello, M., Rejkuba, M., Cuillandre, J. -C., Hudelot, P., Nucita, A. A., Urbano, M., Romelli, E., Raj, M. A., Schirmer, M., Tortora, C., Abdurro'uf, Annibali, F., Baes, M., Boldrini, P., Cabanac, R., Carollo, D., Conselice, C. J., Duc, P. -A., Ferguson, A. M. N., Hunt, L. K., Knapen, J. H., Lonare, P., Marleau, F. R., Paolillo, M., Poulain, M., Sánchez-Janssen, R., Sola, E., Andreon, S., Auricchio, N., Baccigalupi, C., Baldi, M., Bardelli, S., Bodendorf, C., Bonino, D., Branchini, E., Brescia, M., Brinchmann, J., Camera, S., Capobianco, V., Carbone, C., Carlberg, R. G., Carretero, J., Casas, S., Castellano, M., Castignani, G., Cavuoti, S., Cimatti, A., Colodro-Conde, C., Congedo, G., Conversi, L., Copin, Y., Courbin, F., Courtois, H. M., Cropper, M., Da Silva, A., Degaudenzi, H., De Lucia, G., Di Giorgio, A. M., Dinis, J., Dubath, F., Dupac, X., Dusini, S., Farina, M., Farrens, S., Ferriol, S., Fotopoulou, S., Frailis, M., Franceschi, E., Fumana, M., Galeotta, S., George, K., Gillard, W., Gillis, B., Giocoli, C., Gómez-Alvarez, P., Grazian, A., Grupp, F., Haugan, S. V. H., Hoekstra, H., Holmes, W., Hook, I., Hormuth, F., Hornstrup, A., Jahnke, K., Keihänen, E., Kermiche, S., Kiessling, A., Kilbinger, M., Kohley, R., Kubik, B., Kümmel, M., Kunz, M., Kurki-Suonio, H., Laureijs, R., Liebing, P., Ligori, S., Lilje, P. B., Lindholm, V., Lloro, I., Maino, D., Maiorano, E., Mansutti, O., Marggraf, O., Markovic, K., Martinelli, M., Martinet, N., Marulli, F., Massey, R., Maurogordato, S., Medinaceli, E., Mei, S., Mellier, Y., Meneghetti, M., Merlin, E., Meylan, G., Moresco, M., Moscardini, L., Munari, E., Nakajima, R., Neissner, C., Nichol, R. C., Niemi, S. -M., Nightingale, J. W., Padilla, C., Paltani, S., Pasian, F., Pedersen, K., Pettorino, V., Pires, S., Polenta, G., Poncet, M., Popa, L. A., Pozzetti, L., Raison, F., Rebolo, R., Renzi, A., Rhodes, J., Riccio, G., Roncarelli, M., Rossetti, E., Saglia, R., Sakr, Z., Sapone, D., Sartoris, B., Scaramella, R., Schneider, P., Schrabback, T., Secroun, A., Sefusatti, E., Seidel, G., Serrano, S., Sirignano, C., Sirri, G., Stanco, L., Steinwagner, J., Surace, C., Tallada-Crespí, P., Teplitz, H. I., Tereno, I., Toledo-Moreo, R., Torradeflot, F., Tutusaus, I., Valentijn, E. A., Valenziano, L., Vassallo, T., Veropalumbo, A., Wang, Y., Weller, J., Zamorani, G., Zucca, E., Biviano, A., Bolzonella, M., Bozzo, E., Burigana, C., Calabrese, M., Di Ferdinando, D., Vigo, J. A. Escartin, Farinelli, R., Gracia-Carpio, J., Mauri, N., Scottez, V., Tenti, M., Viel, M., Wiesmann, M., Akrami, Y., Allevato, V., Anselmi, S., Ballardini, M., Bethermin, M., Blanchard, A., Blot, L., Borgani, S., Borlaff, A. S., Bruton, S., Calabro, A., Canas-Herrera, G., Cappi, A., Carvalho, C. S., Castro, T., Chambers, K. C., Contarini, S., Cooray, A. R., De Caro, B., Desprez, G., Díaz-Sánchez, A., Di Domizio, S., Dole, H., Escoffier, S., Ferrero, I., Finelli, F., Fornari, F., Gabarra, L., Ganga, K., García-Bellido, J., Gautard, V., Gaztanaga, E., Giacomini, F., Gozaliasl, G., Hall, A., Hildebrandt, H., Hjorth, J., Ilbert, O., Kajava, J. J. E., Kansal, V., Karagiannis, D., Kirkpatrick, C. C., Legrand, L., Libet, G., Loureiro, A., Macias-Perez, J., Maggio, G., Magliocchetti, M., Mannucci, F., Maoli, R., Martins, C. J. A. P., Matthew, S., Maurin, L., Metcalf, R. B., Monaco, P., Moretti, C., Morgante, G., Walton, Nicholas A., Patrizii, L., Pezzotta, A., Pöntinen, M., Popa, V., Porciani, C., Potter, D., Reimberg, P., Risso, I., Rocci, P. -F., Sahlén, M., Schneider, A., Sereno, M., Simon, P., Mancini, A. Spurio, Testera, G., Teyssier, R., Toft, S., Tosi, S., Troja, A., Tucci, M., Valiviita, J., Vergani, D., Verza, G., Zinchenko, I. A., Mamon, G. A., and Scott, D.
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Astrophysics - Astrophysics of Galaxies - Abstract
Extragalactic globular clusters (EGCs) are an abundant and powerful tracer of galaxy dynamics and formation, and their own formation and evolution is also a matter of extensive debate. The compact nature of globular clusters means that they are hard to spatially resolve and thus study outside the Local Group. In this work we have examined how well EGCs will be detectable in images from the Euclid telescope, using both simulated pre-launch images and the first early-release observations of the Fornax galaxy cluster. The Euclid Wide Survey will provide high-spatial resolution VIS imaging in the broad IE band as well as near-infrared photometry (YE, JE, and HE). We estimate that the galaxies within 100 Mpc in the footprint of the Euclid survey host around 830 000 EGCs of which about 350 000 are within the survey's detection limits. For about half of these EGCs, three infrared colours will be available as well. For any galaxy within 50Mpc the brighter half of its GC luminosity function will be detectable by the Euclid Wide Survey. The detectability of EGCs is mainly driven by the residual surface brightness of their host galaxy. We find that an automated machine-learning EGC-classification method based on real Euclid data of the Fornax galaxy cluster provides an efficient method to generate high purity and high completeness GC candidate catalogues. We confirm that EGCs are spatially resolved compared to pure point sources in VIS images of Fornax. Our analysis of both simulated and first on-sky data show that Euclid will increase the number of GCs accessible with high-resolution imaging substantially compared to previous surveys, and will permit the study of GCs in the outskirts of their hosts. Euclid is unique in enabling systematic studies of EGCs in a spatially unbiased and homogeneous manner and is primed to improve our understanding of many understudied aspects of GC astrophysics., Comment: Accepted in A&A
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- 2024
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32. Euclid: Early Release Observations -- Globular clusters in the Fornax galaxy cluster, from dwarf galaxies to the intracluster field
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Saifollahi, T., Voggel, K., Lançon, A., Cantiello, Michele, Raj, M. A., Cuillandre, J. -C., Larsen, S. S., Marleau, F. R., Venhola, A., Schirmer, M., Carollo, D., Duc, P. -A., Ferguson, A. M. N., Hunt, L. K., Kümmel, M., Laureijs, R., Marchal, O., Nucita, A. A., Peletier, R. F., Poulain, M., Rejkuba, M., Sánchez-Janssen, R., Urbano, M., Abdurro'uf, Altieri, B., Baes, M., Bolzonella, M., Conselice, C. J., Cote, P., Dimauro, P., Gonzalez, A. H., Habas, R., Hudelot, P., Kluge, M., Lonare, P., Massari, D., Romelli, E., Scaramella, R., Sola, E., Stone, C., Tortora, C., van Mierlo, S. E., Knapen, J. H., Martín-Fleitas, J., Mora, A., Román, J., Aghanim, N., Amara, A., Andreon, S., Auricchio, N., Baldi, M., Balestra, A., Bardelli, S., Basset, A., Bender, R., Bonino, D., Branchini, E., Brescia, M., Brinchmann, J., Camera, S., Capobianco, V., Carbone, C., Carretero, J., Casas, S., Castellano, M., Cavuoti, S., Cimatti, A., Congedo, G., Conversi, L., Copin, Y., Courbin, F., Courtois, H. M., Cropper, M., Da Silva, A., Degaudenzi, H., Di Giorgio, A. M., Dinis, J., Dubath, F., Dupac, X., Dusini, S., Fabricius, M., Farina, M., Farrens, S., Ferriol, S., Fosalba, P., Frailis, M., Franceschi, E., Fumana, M., Galeotta, S., Garilli, B., Gillard, W., Gillis, B., Giocoli, C., Gómez-Alvarez, P., Granett, B. R., Grazian, A., Grupp, F., Guzzo, L., Haugan, S. V. H., Hoar, J., Hoekstra, H., Holmes, W., Hook, I., Hormuth, F., Hornstrup, A., Jahnke, K., Jhabvala, M., Keihänen, E., Kermiche, S., Kiessling, A., Kitching, T., Kohley, R., Kubik, B., Kuijken, K., Kunz, M., Kurki-Suonio, H., Lahav, O., Mignant, D. Le, Ligori, S., Lilje, P. B., Lindholm, V., Lloro, I., Maino, D., Maiorano, E., Mansutti, O., Marggraf, O., Markovic, K., Martinet, N., Marulli, F., Massey, R., Maurogordato, S., McCracken, H. J., Medinaceli, E., Mei, S., Melchior, M., Mellier, Y., Meneghetti, M., Meylan, G., Moresco, M., Moscardini, L., Munari, E., Nakajima, R., Nichol, R. C., Niemi, S. -M., Padilla, C., Paltani, S., Pasian, F., Pedersen, K., Percival, W. J., Pettorino, V., Pires, S., Polenta, G., Poncet, M., Popa, L. A., Pozzetti, L., Racca, G. D., Raison, F., Rebolo, R., Refregier, A., Renzi, A., Rhodes, J., Riccio, G., Roncarelli, M., Rossetti, E., Saglia, R., Sapone, D., Sartoris, B., Schneider, P., Schrabback, T., Secroun, A., Seidel, G., Serrano, S., Sirignano, C., Sirri, G., Stanco, L., Tallada-Crespí, P., Taylor, A. N., Teplitz, H. I., Tereno, I., Toledo-Moreo, R., Torradeflot, F., Tsyganov, A., Tutusaus, I., Valentijn, E. A., Valenziano, L., Vassallo, T., Kleijn, G. Verdoes, Veropalumbo, A., Wang, Y., Weller, J., Williams, O. R., Zamorani, G., Zucca, E., Biviano, A., Burigana, C., Scottez, V., Simon, P., Balogh, M., and Scott, D.
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Astrophysics - Astrophysics of Galaxies - Abstract
We present an analysis of Euclid observations of a 0.5 deg$^2$ field in the central region of the Fornax galaxy cluster that were acquired during the performance verification phase. With these data, we investigate the potential of Euclid for identifying GCs at 20 Mpc, and validate the search methods using artificial GCs and known GCs within the field from the literature. Our analysis of artificial GCs injected into the data shows that Euclid's data in $I_{\rm E}$ band is 80% complete at about $I_{\rm E} \sim 26.0$ mag ($M_{V\rm } \sim -5.0$ mag), and resolves GCs as small as $r_{\rm h} = 2.5$ pc. In the $I_{\rm E}$ band, we detect more than 95% of the known GCs from previous spectroscopic surveys and GC candidates of the ACS Fornax Cluster Survey, of which more than 80% are resolved. We identify more than 5000 new GC candidates within the field of view down to $I_{\rm E}$ mag, about 1.5 mag fainter than the typical GC luminosity function turn-over magnitude, and investigate their spatial distribution within the intracluster field. We then focus on the GC candidates around dwarf galaxies and investigate their numbers, stacked luminosity distribution and stacked radial distribution. While the overall GC properties are consistent with those in the literature, an interesting over-representation of relatively bright candidates is found within a small number of relatively GC-rich dwarf galaxies. Our work confirms the capabilities of Euclid data in detecting GCs and separating them from foreground and background contaminants at a distance of 20 Mpc, particularly for low-GC count systems such as dwarf galaxies., Comment: Paper submitted as part of the A&A special issue `Euclid on Sky', which contains Euclid key reference papers and first results from the Euclid Early Release Observations
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- 2024
33. CAVITY, Calar Alto Void Integral-field Treasury surveY and project extension
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Pérez, I., Verley, S., Sánchez-Menguiano, L., Ruiz-Lara, T., García-Benito, R., Puertas, S. Duarte, Jiménez, A., Domínguez-Gómez, J., Espada, D., Peletier, R. F., Román, J., Rodríguez, M. I., Alarcón, P. Sánchez, Argudo-Fernández, M., Torres-Ríos, G., Bidaran, B., Alcázar-Laynez, M., van de Weygaert, R., Sánchez, S. F., Lisenfeld, U., Zurita, A., Florido, E., van der Hulst, J. M., Blázquez-Calero, G., Villalba-González, P., del Moral-Castro, I., Lugo-Aranda, A., Walo-Martín, D., Conrado, A., Delgado, R. González, Falcón-Barroso, J., Ferré-Mateu, A., Hernández-Sánchez, M., Awad, P., Kreckel, K., Courtois, H., Espada-Miura, R., Relaño, M., Galbany, L., Sánchez-Blázquez, P., Pérez-Montero, E., Sánchez-Portal, M., Bongiovanni, A., Planelles, S., Quilis, V., Aubert, M., Guinet, D., Pomaréde, D., Weijmans, A. M., Raj, M. A., Aragón-Calvo, M. A., Azzaro, M., Bergond, G., Blazek, M., Cikota, S., Fernández-Martín, A., Gardini, A., Guijarro, A., Hermelo, I., Martín, P., and Linares, J. I. Vico
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Astrophysics - Astrophysics of Galaxies - Abstract
We have learnt in the last decades that the majority of galaxies belong to high density regions interconnected in a sponge-like fashion. This large-scale structure is characterised by clusters, filaments, walls, where most galaxies concentrate, but also under-dense regions, called voids. The void regions and the galaxies within represent an ideal place for the study of galaxy formation and evolution as they are largely unaffected by the complex physical processes that transform galaxies in high-density environments. These void galaxies can hold the key as well to answer current challenges to the $\Lambda$CDM paradigm. The Calar Alto Void Integral-field Treasury surveY (CAVITY) is a Legacy project approved by the Calar Alto Observatory to obtain spatially resolved spectroscopic information of $\sim300$ void galaxies in the Local Universe (0.005 < z < 0.050) covering from -17.0 to -21.5 in $\rm r$ band absolute magnitude. It officially started in January 2021 and has been awarded 110 useful dark observing nights at the 3.5 m telescope using the PMAS spectrograph. Complementary follow-up projects including deep optical imaging, integrated, as well as resolved CO data, and integrated HI spectra, have joint the PMAS observations and naturally complete the scientific aim of characterising galaxies in cosmic voids. The extension data has been denominated CAVITY+. The data will be available to the whole community in different data releases, the first of which is planned for July 2024, and it will provide the community with PMAS data cubes for around 100 void galaxies through a user friendly, and well documented, database platform. We present here the survey, sample selection, data reduction, quality control schemes, science goals, and some examples of the scientific power of the CAVITY and CAVITY+ data., Comment: 19 pages, 11 figures. Accepted for publication in A&A - Replacement after A&A minor language edition
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- 2024
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34. Quantification of Soil Erosion Using Digital Soil Mapping and RUSLE Method for Coimbatore District, Tamil Nadu, India
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Kumaraperumal, R., Baruah, Suraj, Nivas Raj, M., Muthumanickam, D., Jagadeeswaran, R., Kannan, Balaji, Vishnu Shankar, S., and Athira Nair, M.
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- 2024
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35. Single-step hydrothermal strategy of hybrid ternary CuO/TiO2/rGO nanocomposites-unveiling the power of quasi-solid-state electrolyte with an enriched energy density for an asymmetric supercapacitor fabrication
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Harini, S, Anto Feradrick Samson, V, Fennyl Britto, J, Sherin Steena, A, Madhavan, J, and Victor Antony Raj, M
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- 2024
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36. Graphs with Large Steiner Number
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John, J. and Raj, M. S. Malchijah
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- 2024
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37. Effect of temperature and physical modification on Nutritional Composition and Functional properties of Cassava, Banana and Corn starches
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Geetha, K., Ilamaran, M., Ramasamy, D. Periyar, Santhi, V. P., Arul Raj, M. Sam, and Ayyanar, M.
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- 2024
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38. Reading Room Interruptions are Less Disruptive When Using Asynchronous Communication Methods
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Yacoub, Joseph H., Weitz, Daniel A., Stirrat, Thomas P., Fong, Allan, and Ratwani, Raj M.
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- 2024
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39. Validation of pre-treatments for cost effective production of bioethanol from floral wastes
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Rachel, Shalini, Raj, M. Shailaja, and Shajan, Maria
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- 2025
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40. Preparation and Characterization of Pomadasys maculatus Otolith Stone and Termite Mound Soil-Mediated Nanopowder and Evaluation of Its Biomedical Applications
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Kanimozhi, C., Gokila, G., Raj, M. Sam Arul, Ayyanar, M., and Manimekalai, R.
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- 2025
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41. Minimum linear arrangement and embedding of (K11 − C11)n into specific graphs with optimal wirelength calculation
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Vincy, G. Caroline and Raj, M. David
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- 2025
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42. Fake and propaganda images detection using automated adaptive gaining sharing knowledge algorithm with DenseNet121
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Muthukumar, A., Raj, M. Thanga, Ramalakshmi, R., Meena, A., and Kaleeswari, P.
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- 2024
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43. A fractional mathematical model for vaccinated humans with the impairment of Monkeypox transmission
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Venkatesh, A., Manivel, M., Arunkumar, K., Prakash Raj, M., Shyamsunder, and Purohit, S. D.
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- 2024
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44. Manganese Oxide-Enriched Copper Oxide (Mn2O3/CuO) Nanocomposite Electrodes for Supercapacitor Application
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Joysi, M. Gladys, Senthil, S., Jennifer, P. Joselene Suzan, Muthupandi, S., Galeb, W., AnnieCanisius, D., and Raj, M. Victor Antony
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- 2024
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45. Generation of digital soil mapping for Coimbatore districts using multinomial logistic regression approach
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Shankar, S. Vishnu, Kumaraperumal, R., Radha, M., Kannan, Balaji, Patil, S. G., Vanitha, G., Raj, M. Nivas, Athira, M., and Ananthakrishnan, S.
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- 2024
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46. The MeerKAT Fornax Survey II. The rapid removal of HI from dwarf galaxies in the Fornax cluster
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Kleiner, D., Serra, P., Maccagni, F. M., Raj, M. A., de Blok, W. J. G., Józsa, G. I. G., Kamphuis, P., Kraan-Korteweg, R., Loi, F., Loni, A., Loubser, S. I., Molnár, D. Cs., Oosterloo, T. A., Peletier, R., and Pisano, D. J.
- Subjects
Astrophysics - Astrophysics of Galaxies - Abstract
We present MeerKAT Fornax Survey atomic hydrogen (HI) observations of the dwarf galaxies located in the central ~2.5 x 4 deg$^2$ of the Fornax galaxy cluster. The HI images presented in this work have a $3\sigma$ column density sensitivity between 2.7 and 50 x 10$^{18}$ cm$^{-2}$ over 25 km s$^{-1}$ for spatial resolution between 4 and 1 kpc. We are able to detect an impressive MHI = 5 x 10$^{5}$ Msun 3$\sigma$ point source with a line width of 50 km s$^{-1}$ at a distance of 20 Mpc. We detect HI in 17 out of the 304 dwarfs in our field -- 14 out of the 36 late type dwarfs (LTDs), and 3 of the 268 early type dwarfs (ETDs). The HI-detected LTDs have likely just joined the cluster and are on their first infall as they are located at large clustocentric radii, with comparable MHI and mean stellar surface brightness at fixed luminosity as blue, star-forming LTDs in the field. The HI-detected ETDs have likely been in the cluster longer than the LTDs and acquired their HI through a recent merger or accretion from nearby HI. Eight of the HI-detected LTDs host irregular or asymmetric HI emission and disturbed or lopsided stellar emission. There are two clear cases of ram-pressure shaping the HI, with the LTDs displaying compressed HI on the side closest to the cluster centre and a one-sided, starless tail pointing away from the cluster centre. The HI-detected dwarfs avoid the most massive potentials, consistent with massive galaxies playing an active role in the removal of HI. We create a simple toy model to quantify the timescale of HI stripping in the cluster. We find that a MHI = 10$^{8}$ Msun dwarf will be stripped in ~ 240 Myr. The model is consistent with our observations, where low mass LTDs are directly stripped of their HI from a single encounter and more massive LTDs can harbour a disturbed HI morphology due to longer times or multiple encounters being required to fully strip their HI., Comment: Accepted in Astronomy & Astrophysics. 21 pages, 10 figures. Data available at the MeerKAT Fornax Survey website https://sites.google.com/inaf.it/meerkatfornaxsurvey
- Published
- 2023
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47. The Role of Personal Harmony and Organisational Citizenship Behaviour in Enhancing Job Satisfaction of Teachers Working in Indian Higher Educational Institutions During the COVID-19 Catastrophe in the VUCA World
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Alex Praveen Raj, M., author, Nelson, D., author, and Anand Shankar Raja, M., author
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- 2024
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48. New Property Averaging Scheme for Volume of Fluid Method for Two-Phase Flows with Large Viscosity Ratios
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Rajendran, Sucharitha, Manglik, Raj M, and Jog, Milind A
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Physics - Fluid Dynamics ,Physics - Computational Physics - Abstract
To predict liquid-gas two-phase flow phenomena, accurate tracking and prediction of the evolving liquid-gas interface is required. Volume-of-Fluid or VoF method has been used in the literature for computationally modeling of such flows. In the VoF method, a single set of governing equations are solved for both phases along with an advection equation for the volume fraction. The properties in each computational cell are determined by a linear weighted average of the properties of the two fluids based on the phase fraction. While the method predicts water-air flows well, the predictions tend to deviate significantly from experimental data for liquids with high viscosity. A new property averaging technique is proposed in this paper, which is shown to provide accurate results for high viscosity liquids. Computational predictions using the open source VoF solver interFoam (available as a part of the OpenFOAM computational tool), and those obtained using the proposed method are compared with experimental data for multiple two-phase applications. Four different problems, viz., suspended droplet in air, jet breakup, drop impact on thin films, and air entrapment during drop interaction with liquid pool, are considered to extensively validate the new method. Experimental data are used to cover a range of surface tension and viscosities. For all cases, the modified VoF solver is observed to perform significantly better than original VoF method., Comment: Journal of Fluids Engineering
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- 2023
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49. Engineering potyvirus-like particles to display multiple copies of tuberculosis antigens
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Princess, R. and Stephen Raj, M. L.
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- 2024
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50. A novel similarity measure based on new accuracy function on interval-valued intuitionistic fuzzy number and its application to multicriteria decision-making problem
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Vishnukumar, P., Edwin Antony Raj, M., and Sivaraman, Geetha
- Published
- 2024
- Full Text
- View/download PDF
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