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Extended MHD simulation of resonant magnetic perturbations
Strauss, H.R.,Sugiyama, L.,Park, G.Y.,Chang, C.S.,Ku, S.,Joseph, I. International Atomic Energy Agency 2009 Nuclear fusion Vol.49 No.5
<P>Resonant magnetic perturbations (RMPs) have been found effective in suppressing edge localized modes (ELMs) in the DIII-D experiment (Evans <I>et al</I> 2006 <I>Phys. Plasmas</I> <B>13</B> 056121, Moyer <I>et al</I> 2005 <I>Phys. Plasmas</I> <B>12</B> 056119). Simulations with the M3D initial value code indicate that plasma rotation, due to an MHD toroidal rotation or to two-fluid drifts, has an essential effect on the RMP. When the flow is below a threshold, the RMP field can couple to a resistive mode with a helical structure, different from the usual ELM, that amplifies the non-axisymmetric field. The magnetic field becomes stochastic in the outer part of the plasma, causing density and temperature loss. At higher rotation speed, the resistive mode is stabilized and the applied RMP is screened from the plasma, so that the stochastic magnetic layer is thinner and the temperature remains similar to the initial unperturbed state. The rotational flow effects, along with the remnants of the screened RMP, cause a density loss which extends into the plasma core. The two-fluid model contains intrinsic drift motion and axisymmetric toroidal rotation may not be needed to screen the RMP nor stabilize the resistive mode.</P>
RNA-seq pinpoints a Xanthomonas TAL-effector activated resistance gene in a large-crop genome
Strauss, T.,van Poecke, R.M.P.,Strauss, A.,Romer, P.,Minsavage, G.V.,Singh, S.,Wolf, C.,Strauss, A.,Kim, S.,Lee, H.-A. National Academy of Sciences 2012 PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF Vol.109 No.47
( Andrew S. Bi ),( Dhruv S. Shankar ),( Kinjal D. Vasavada ),( Nina D. Fisher ),( Eric J. Strauss ),( Michael J. Alaia ),( Kirk A. Campbell ) 대한슬관절학회 2022 대한슬관절학회지 Vol.34 No.-
Background: Patient-reported allergies (PRAs) are often stigmatized as a potential nonmodifiable risk factor for increased pain and worse functional outcomes following surgery. However, there is a dearth of literature directly assessing the impact of PRAs on outcomes in sport surgeries such as medial patellofemoral ligament reconstruction (MPFLR). The purpose of our study was to determine whether PRAs were associated with worse outcomes following MPFLR. Methods: We conducted a retrospective review of patients who underwent MPFLR at our institution from 2011 to 2019. Patients were included if they had at least 12 months of follow-up. PRAs were obtained from preoperative medical assessments and categorized by drug class. Demographic and perioperative data were obtained from electronic medical records. Postoperative outcomes were measured using a telephone survey and included recurrent instability, Visual analog scale (VAS) for pain, VAS for sports, Kujala score, MPFL-Return to Sport after Injury (MPFL-RSI) score, and overall satisfaction score. Multiple linear regression was used to determine association between PRAs and outcome measures, and p-values less than 0.05 were considered significant. Results: The cohort included 141 MPFLR. Most patients were female (98, 70%) with an average age of 25 years (range 12-56 years). Average follow-up time was 47 months. Forty-seven patients (33%) reported at least one PRA. There were no significant differences in postoperative pain, functional outcomes, satisfaction, or return to sport between patients with or without PRAs (all p > 0.05). Absence of antibiotic PRAs was predictive of higher VAS (p < 0.007), but there were no other differences. There were no significant differences in outcomes between patients without PRAs, PRAs without a concomitant psychiatric disorder, or PRAs with a concomitant psychiatric disorder (all p > 0.05). Conclusions: In conclusion, PRAs with or without concomitant psychiatric diagnoses are not associated with worse postoperative pain, functional outcomes, or satisfaction following MPFLR with allograft, dispelling common misconceptions that increased number of allergies or psychiatric diagnoses lead to inferior surgical outcomes. Presence of antibiotic allergies was associated with lower VAS postoperative pain score. Future research should investigate the relationship between PRAs and other surgeries in the field of sports medicine.
Proton Decay of 21Na for 20Ne Energy Levels
Kim M. J.,Chae K. Y.,Cha S. M.,Ahn S. H.,Bardayan D. W.,Chipps K. A.,Cizewski J. A.,Howard M. E.,Manning B.,Ratkiewicz A.,Kozub R. L.,Kwak K.,Matos M.,O’Malley P. D.,Strauss S.,Pain S. D.,Pittman S. T 한국물리학회 2020 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.77 No.5
The 24Mg(p,α)21Na transfer reaction has been previously studied for a spectroscopic study of 21Na [Cha et al., Phys. Rev. C 96, 025810 (2017)]. In this follow-up analysis, the proton decays of the excited states of the radionuclide 21Na, which were measured simultaneously, are reported. By investigating the coincidence between the reaction α-particles and decay protons, we were able to identify three groups of events that are associated with the energy levels in 20Ne. The 20Ne excitation energy plot was obtained as a result. The four lowest known energy levels in 20Ne (the ground state and excited states at Ex = 1.633, 4.247 and 4.966 MeV) were clearly observed.
24Mg(p, α)21Na Reaction Study for Spectroscopy of 21Na
차수미,K. Y. Chae,김아람,E. J. Lee,S. Ahn,D. W. Bardayan,K. A. Chipps,J. A. Cizewski,M. E. Howard,B. Manning,P. D. O’Malley,A. Ratkiewicz,S. Strauss,R. L. Kozub,M. Matos,S. D. Pain,S. T. Pittman,M. S. Smith 한국물리학회 2015 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.67 No.8
The 24Mg(p, α)21Na reaction was measured at the Holifield Radioactive Ion Beam Facility at Oak Ridge National Laboratory in order to better constrain the spins and parities of the energy levels in 21Na for the astrophysically important 17F(α, p)20Ne reaction rate calculation. 31-MeV proton beams from the 25-MV tandem accelerator and enriched 24Mg solid targets were used. Recoiling 4He particles from the 24Mg(p, α)21Na reaction were detected by a highly segmented silicon detector array which measured the yields of 4He particles over a range of angles simultaneously. A new level at 6661 ± 5 keV was observed in the present work. The extracted angular distributions for the first four levels of 21Na and the results from distorted wave Born approximation (DWBA) calculations were compared to verify and extract the angular momentum transfer.
( Dhruv S. Shankar ),( Kinjal D. Vasavada ),( Amanda Avila ),( Brittany Declouette ),( Hadi Aziz ),( Eric J. Strauss ),( Michael J. Alaia ),( Laith M. Jazrawi ) 대한슬관절학회 2023 대한슬관절학회지 Vol.35 No.-
Background Single-stage medial meniscus allograft transplantation (MAT) with concomitant anterior cruciate ligament reconstruction (ACLR) is a technically challenging procedure for management of knee pain and instability in younger patients, but clinical and functional outcomes data are sparse. The purpose of this study was to assess surgical and patient-reported outcomes following concomitant ACLR and medial MAT. Methods We conducted a retrospective case series of patients who underwent medial MAT with concomitant primary or revision ACLR at our institution from 2010 to 2021 and had minimum 12-month follow-up. Complications, reoperations, visual analog scale (VAS) pain, satisfaction, Lysholm score, return to sport, and return to work outcomes were assessed. Patient-Reported Outcomes Measurement Information System (PROMIS) Pain Interference, Pain Intensity, and Physical Function Scores were used to measure patients’ functional status relative to the US population. P-values < 0.05 were considered significant. Results The cohort consisted of 17 knees of 16 individual patients. The cohort was majority male (82.4%) with mean age of 31.9 years (range 19-49 years) and mean body mass index (BMI) of 27.9 kg/m2 (range 22.5-53.3 kg/m2). Mean follow-up time was 56.8 months (range 13-106 months). Most patients underwent revision ACLR (64.7%). The 1-year reoperation rate was high (23.5%), with two patients (11.8%) tearing their meniscus graft. Patient-reported outcomes indicated low VAS pain (mean 2.2), high satisfaction (mean 77.9%), and fair Lysholm score (mean 81.1). Return to work rate was high (92.9%), while return to sport rate was low (42.9%). Postoperative PROMIS scores were comparable or superior to the national average and correlated significantly with patient satisfaction (p < 0.05). Conclusions The concomitant ACLR and MAT procedure is associated with excellent knee pain and functional outcomes and high rate of return to work after surgery, though the 1-year reoperation rate is high and rate of return to sport is low.
( Dhruv S. Shankar ),( Amanda Avila ),( Brittany Declouette ),( Kinjal D. Vasavada ),( Isabella B. Jazrawi ),( Michael J. Alaia ),( Guillem Gonzalez-lomas ),( Eric J. Strauss ),( Kirk A. Campbell ) 대한슬관절학회 2023 대한슬관절학회지 Vol.35 No.-
Background The purpose of this study was to identify socioeconomic predictors of time to initial evaluation, time to surgery, and postoperative outcomes among lateral patellar instability patients undergoing medial patellofemoral ligament reconstruction (MPFLR). Methods We conducted a retrospective review of patients at our institution who underwent primary MPFLR with allograft from 2011 to 2019 and had minimum 12-month follow-up. Patients were administered an email survey in January 2022 to assess symptom history, socioeconomic status, and postoperative outcomes including VAS satisfaction and Kujala score. Predictors of time to initial evaluation, time to surgery, and postoperative outcomes were identified using multivariable linear and logistic regression with stepwise selection. Results Seventy patients were included in the cohort (mean age 24.8 years, 72.9% female, mean follow-up time 45.7 months). Mean time to evaluation was 6.4 months (range 0-221) and mean time to surgery was 73.6 months (range 0-444). Having a general health check-up in the year prior to surgery was predictive of shorter time to initial evaluation (β = - 100.5 [- 174.5, - 26.5], p = 0.008). Home ownership was predictive of shorter time to surgery (β = - 56.5 [- 104.7, 8.3], p = 0.02). Full-time employment was predictive of higher VAS satisfaction (β = 14.1 [4.3, 23.9], p = 0.006) and higher Kujala score (β = 8.7 [0.9, 16.5], p = 0.03). Conclusion Markers of higher socioeconomic status including having a general check-up in the year prior to surgery, home ownership, and full-time employment were predictive of shorter time to initial evaluation, shorter time to surgery, and superior postoperative outcomes. Level of evidence: IV, retrospective case series.
An eponymous history of the anterolateral ligament complex of the knee
( Allison M. Morgan ),( Andrew S. Bi ),( Daniel J. Kaplan ),( Michael J. Alaia ),( Eric J. Strauss ),( Laith M. Jazrawi ) 대한슬관절학회 2022 대한슬관절학회지 Vol.34 No.-
Background: Recent interest has surged in the anterolateral ligament (ALL) and complex (ALC) of the knee. Its existence and role in rotary stability of the knee, particularly in the setting of anterior cruciate ligament (ACL) reconstruction, remains a contentious and controversial topic. Understanding the ALC: We must review our history and recognize the pioneers who pushed our understanding of the ALL forward before it was popularly recognized as a discrete structure. Additionally, given that many eponyms remain in common use related to the ALC, we must standardize our nomenclature to prevent misuse or misunderstanding of terms in the literature. In this review, modern understanding of the anterolateral ligament complex (ALC) is traced to 1829 by exploring eponymous terms first in anatomy and then in surgical technique. Understanding our history and terminology will allow us to better understand the ALC itself. Conclusion: This review aims to provide historical context, define terminology, and provide insight into the clinical relevance of the ALC.
Cosmological constraints from the SDSS luminous red galaxies
Tegmark, Max,Eisenstein, Daniel J.,Strauss, Michael A.,Weinberg, David H.,Blanton, Michael R.,Frieman, Joshua A.,Fukugita, Masataka,Gunn, James E.,Hamilton, Andrew J. S.,Knapp, Gillian R.,Nichol, Robe American Physical Society 2006 PHYSICAL REVIEW D - Vol.74 No.12