43 results on '"Andrew Yan"'
Search Results
2. Predictors of persistent symptoms after mRNA SARS-CoV-2 vaccine-related myocarditis (myovacc registry)
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Daniel Schroth, Ria Garg, Xhoi Bocova, Jochen Hansmann, Markus Haass, Andrew Yan, Carlos Fernando, Binita Chacko, Anastasia Oikonomou, James White, Muhammad Mustafa Alhussein, Sorin Giusca, Andreas Ochs, Grigorios Korosoglou, Florian André, Matthias G. Friedrich, and Marco Ochs
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covid vaccination ,myocarditis ,persistent symptoms ,predictors ,outcome ,Diseases of the circulatory (Cardiovascular) system ,RC666-701 - Abstract
AimsEpidemiological surveillance has raised safety concerns for mRNA SARS-CoV-2-vaccination-related myocarditis. We aimed to analyze epidemiological, clinical and imaging findings associated with clinical outcomes in these patients in an international multi-center registry (NCT05268458).Methods and resultsPatients with clinical and CMR diagnosis of acute myocarditis within 30 days after mRNA SARS-CoV-2—vaccination were included from five centers in Canada and Germany between 05/21 and 01/22. Clinical follow-up on persistent symptoms was collected. We enrolled 59 patients (80% males, mean age 29 years) with CMR-derived mild myocarditis (hs-Troponin-T 552 [249–1,193] ng/L, CRP 28 [13–51] mg/L; LVEF 57 ± 7%, LGE 3 [2–5] segments). Most common symptoms at baseline were chest pain (92%) and dyspnea (37%). Follow-up data from 50 patients showed overall symptomatic burden improvement. However, 12/50 patients (24%, 75% females, mean age 37 years) reported persisting symptoms (median interval 228 days) of chest pain (n = 8/12, 67%), dyspnea (n = 7/12, 58%), with increasing occurrence of fatigue (n = 5/12, 42%) and palpitations (n = 2/12, 17%). These patients had initial lower CRP, lower cardiac involvement in CMR, and fewer ECG changes. Significant predictors of persisting symptoms were female sex and dyspnea at initial presentation. Initial severity of myocarditis was not associated with persisting complaints.ConclusionA relevant proportion of patients with mRNA SARS-CoV-2-vaccination-related myocarditis report persisting complaints. While young males are usually affected, patients with persisting symptoms were predominantly females and older. The severity of the initial cardiac involvement not predicting these symptoms may suggest an extracardiac origin.
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- 2023
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3. Short dual antiplatelet therapy duration after percutaneous coronary intervention in high bleeding risk patients: Systematic review and meta-analysis
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Kevin R. Bainey, Guillaume Marquis-Gravel, Blair J. MacDonald, David Bewick, Andrew Yan, and Ricky D. Turgeon
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Medicine ,Science - Abstract
Introduction Dual antiplatelet therapy (DAPT) following percutaneous coronary intervention (PCI) reduces major adverse cardiovascular events (MACE) and stent thrombosis. However, DAPT duration is a concern in high bleeding risk (HBR) patients. We evaluated the effect of short DAPT (1–3 months) compared to standard DAPT (6–12 months) on bleeding and ischemic events in HBR PCI. Methods We searched MEDLINE, Embase and CENTRAL up to August 18, 2022. Randomized controlled trials (RCTs) comparing short DAPT (1–3 months) versus standard DAPT in HBR PCI were included. We assessed risk of bias (RoB) using the Cochrane RoB2 tool, and certainty of evidence using GRADE criteria. Outcomes included MACE, all-cause death, stent thrombosis, major bleeding, and the composite of major or clinically-relevant non-major bleeding. We estimated risk ratios (RR) and 95% confidence intervals (CI) using a random-effects model. Results From 503 articles, we included five RCTs (n = 7,242) at overall low risk of bias with median follow-up of 12-months. Compared to standard DAPT, short DAPT did not increase MACE (RR 1.02, 95% CI 0.84–1.23), all-cause death (RR 0.92, 95% CI 0.71–1.20) or stent thrombosis (RR 1.47, 95% CI 0.73–2.93). Short DAPT reduced major bleeding (RR 0.34, 95% CI 0.13–0.90) and the composite of major or clinically-relevant non-major bleeding (RR 0.60, 95% CI 0.44–0.81), translating to 21 and 34 fewer events, respectively, per 1000 patients. Conclusions In HBR PCI, DAPT for 1–3 months compared to 6–12 months reduced clinically-relevant bleeding events without jeopardizing ischemic risk. Short DAPT should be considered in HBR patients receiving PCI.
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- 2023
4. Meta-analysis Comparing Outcomes of Type 2 Myocardial Infarction and Type 1 Myocardial Infarction With a Focus on Dual Antiplatelet Therapy
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Christopher Reid, MD, Ahmed Alturki, MD, Andrew Yan, MD, Derek So, MD, MSC, Dennis Ko, MD, MSC, Jean-Francois Tanguay, MD, Amal Bessissow, MD, MSC, Shamir Mehta, MD, MSC, Shaun Goodman, MD, MSC, and Thao Huynh, MD, PhD
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Diseases of the circulatory (Cardiovascular) system ,RC666-701 - Abstract
Background: There are important knowledge gaps in type 2 myocardial infarction (T2MI). Our primary objective was to compare the outcomes of patients with T2MI with those of patients with type 1 myocardial infarction (T1MI). Our secondary objective was to determine whether randomized controlled trials (RCTs) evaluating dual antiplatelets (DAPTs) have explicitly included patients with T2MI. Methods: We performed a meta-analysis comparing outcomes of patients with T2MI with patients with T1MI and a separate systematic review to evaluate the inclusion of T2MI in RCTs evaluating DAPT. There were 19 cohorts enrolling 48,829 patients (40,604 with T1MI and 5361 with T2MI) and 51 RCTs enrolling 188,132 patients with acute coronary syndrome. Results: Patients with T2MI had approximately 2-fold increases in unadjusted odds of long-term mortality compared with patients with T1MI (odds ratio, 2.47; 95% confidence interval, 2.06-2.96; P < 0.0001) and a 45% increase in adjusted odds of long-term mortality (odds ratio, 1.45; 95% confidence interval, 1.25-1.69; P < 0.0001, respectively). There was no published evaluation of efficacy, effectiveness, and safety of DAPT in patients with T2MI. Conclusion: Patients with T2MI are at increased risk of adjusted all-cause long-term mortality compared with patients with T1MI. The role of DAPT remains unclear in T2MI. Résumé: Contexte: Il existe d’importantes lacunes dans notre connaissance de l’infarctus du myocarde de type 2 (IMT2). Notre objectif principal était de comparer le devenir de patients ayant subi un IMT2 et celui de patients ayant subi un infarctus du myocarde de type 1 (IMT1). Notre objectif secondaire était de déterminer si des essais contrôlés randomisés (ECR) visant à évaluer des bithérapies antiplaquettaires (BA) avaient inclus explicitement des patients ayant subi un IMT2. Méthodologie: Nous avons réalisé une méta-analyse afin de comparer le devenir de patients ayant subi un IMT2 et celui de patients ayant subi un IMT1. Nous avons aussi effectué une revue systématique distincte des données pour évaluer l’inclusion de cas d’IMT2 dans les ECR visant à évaluer des BA. Il y avait 19 cohortes regroupant 48 829 patients (40 604 ayant subi un IMT1 et 5 361 ayant subi un IMT2) et 51 ECR regroupant 188 132 patients atteints d’un syndrome coronarien aigu. Résultats: Chez les patients ayant subi un IMT2, la probabilité non corrigée de mortalité à long terme était environ 2 fois plus élevée que chez les patients ayant subi un IMT1 (rapport de cotes : 2,47; intervalle de confiance à 95 % : 2,06-2,96; p < 0,0001), et la probabilité corrigée de mortalité à long terme était accrue de 45 % (rapport de cotes : 1,45; intervalle de confiance à 95 % : 1,25-1,69; p < 0,0001). Aucune évaluation de l’efficacité (potentielle ou réelle) et de l’innocuité des BA chez les patients ayant subi un IMT2 n’a été publiée. Conclusion: Le risque corrigé de mortalité à long terme toutes causes confondues est plus élevé chez les patients ayant subi un IMT2 que chez les patients ayant subi un IMT1. Le rôle des BA reste à élucider dans les cas d’IMT2.
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- 2020
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5. UMA ANÁLISE HISTÓRICO-LITERÁRIA DAS REPRESENTAÇÕES DE LETRADOS EM OBRAS LITERÁRIAS BRASILEIRAS
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MARINHO, Andrew Yan Solano, primary
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- 2021
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6. Wall Shear Stress Differences Between Arterial and Venous Coronary Artery Bypass Grafts One Month After Surgery
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Nhien Tran-Nguyen, Francesca Condemi, Andrew Yan, Stephen Fremes, Piero Triverio, and Laura Jimenez-Juan
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Biomedical Engineering - Abstract
Although coronary artery bypass graft (CABG) surgery is a well-established intervention, graft failure can occur, and the underlying mechanisms remain incompletely understood. The purpose of this prospective study is to utilize computational fluid dynamics (CFD) to investigate how graft hemodynamics one month post surgery may vary among graft types, which have different long-term patency rates. Twenty-four grafts from 10 participants (64.6 ± 8.5 years, 9 men) were scanned with coronary CT angiography and 4D flow MRI one month after CABG surgery. Grafts included 10 left internal mammary arteries (LIMA), 3 radial arteries (RA), and 11 saphenous vein grafts (SVG). Image-guided CFD was used to quantify blood flow rate and wall area exposed to abnormal wall shear stress (WSS). Arterial grafts had a lower abnormal WSS area than venous grafts (17.9% vs. 70.1%; p = 0.001), and a similar trend was observed for LIMA vs. SVG (13.8% vs. 70.1%; p = 0.001). Abnormal WSS area correlated positively to lumen diameter (p
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- 2022
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7. Improving hospital readmission prediction using individualized utility analysis.
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Michael Ko, Emma Chen, Ashwin Agrawal, Pranav Rajpurkar, Anand Avati, Andrew Yan-Tak Ng, Sanjay Basu, and Nigam H. Shah
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- 2021
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8. Utilisation of waste bread for fermentative succinic acid production
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Leung, Cho Chark Joe, Cheung, Anaxagoras Siu Yeung, Zhang, Andrew Yan-Zhu, Lam, Koon Fung, and Lin, Carol Sze Ki
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- 2012
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9. UMA ANÁLISE HISTÓRICO-LITERÁRIA DAS REPRESENTAÇÕES DE LETRADOS EM OBRAS LITERÁRIAS BRASILEIRAS
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Andrew Yan Solano MARINHO
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- 2021
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10. Development of Voltage Sag Metric for Large Meshed Transmission Systems and Stochastic Fault Data Sensitivity Analysis
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Andrew Yan, Arun Narang, and Nazila Rajaei
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Computer science ,law ,Control theory ,Voltage sag ,Metric (mathematics) ,Power quality ,Sensitivity (control systems) ,Transmission system ,Fault (power engineering) ,Transformer ,Low voltage ,Voltage ,law.invention - Abstract
This paper describes an approach to determine the impact zone and voltage sag metric for delivery points (DP) in large meshed transmission systems. The metric is to quantify the severity and frequency of voltage sag (VS) experienced at particular DPs. The network model of the system is developed and verified for voltage sag calculation using fault data captured by the power quality (PQ) meters installed across the system. The validated model is used to form the impact zone in terms of the circuit length causing the voltage sag event. Having the impact zones, stochastic fault data is used to create the voltage sag metric. To show the sensitivity of voltage sag metric to different treatment of stochastic fault data, the voltage sag metric is obtained with two sets of data: individual circuit outage frequency and zonal average outage frequency. The approach is implemented on Hydro One Ontario Transmission system. The results are examined to correlate the system behavior with network configuration, voltage level, and proximity to major stations with auto transformers. The results are validated using the data collected over 3 to 5 years by the PQ meters installed in the system. At utility-scale, the approach is used to proactively predict the impact of new planning projects, the retirement of big generation units, and major system reconfiguration on the voltage sag performance of major stations. Additionally, for customers connected on the low voltage (LV) side of transformer stations, the proposed metric can be used to differentiate the impact of transmission system from the events caused by faults on distribution feeders.
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- 2020
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11. Efficacy and Safety of Aldafermin, an Engineered FGF19 Analog, in a Randomized, Double-Blind, Placebo-Controlled Trial of Patients With Nonalcoholic Steatohepatitis
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Kristin Nelson, Hsiao D. Lieu, Mildred Gottwald, James F. Trotter, Guy W. Neff, Nadege Gunn, Alex M. DePaoli, Sam E. Moussa, Ziad Younes, Andrew Yan, Mustafa R. Bashir, Angelo H. Paredes, Juan P. Frias, William C.G. Chang, Cynthia D. Guy, Stephen A. Harrison, Lei Ling, and Anita Kohli
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0301 basic medicine ,Adult ,Liver Cirrhosis ,Male ,medicine.medical_specialty ,Placebo-controlled study ,Phases of clinical research ,Placebo ,Gastroenterology ,03 medical and health sciences ,0302 clinical medicine ,Double-Blind Method ,Fibrosis ,Non-alcoholic Fatty Liver Disease ,Internal medicine ,Nonalcoholic fatty liver disease ,medicine ,Humans ,Adverse effect ,Aged ,Hepatology ,business.industry ,FGF19 ,Middle Aged ,medicine.disease ,Confidence interval ,Fibroblast Growth Factors ,030104 developmental biology ,Treatment Outcome ,030211 gastroenterology & hepatology ,Female ,business - Abstract
Background & Aims Aldafermin, an engineered analog of fibroblast growth factor 19, inhibits bile acid synthesis and regulates metabolic homeostasis. We report results from a 24-week, phase 2 study, with serial liver biopsies, of patients with nonalcoholic steatohepatitis (NASH). Methods We performed a double-blind study of 78 patients with NASH at 9 centers in the United States. Key inclusion criteria were biopsy-proven NASH with Nonalcoholic Fatty Liver Disease Activity Score ≥4, stage 2 or 3 fibrosis by NASH Clinical Research Network classification, and absolute liver fat content ≥8%, measured by magnetic resonance imaging-proton density fat fraction. Patients were randomly assigned (1:2) to groups given subcutaneous placebo (n = 25) or aldafermin 1 mg (n = 53) daily for 24 weeks. The primary outcome was change in absolute liver fat content from baseline at week 24. Secondary outcomes included serum markers and histologic measures of fibrosis improvement and NASH resolution. Results At week 24, the aldafermin group had a significant reduction in absolute liver fat content (reduction of 7.7%) compared with placebo (reduction of 2.7%; difference, reduction of 5.0%; 95% confidence interval, reduction of 8.0%−1.9%; P = .002). Aldafermin produced significantly greater decreases in levels of 7α-hydroxy-4-cholesten-3-one, bile acids, alanine and aspartate aminotransferases, and neoepitope-specific N-terminal pro-peptide of type III collagen (Pro-C3) than placebo. Fibrosis improvement (≥1 stage) with no worsening of NASH was achieved in 38% of patients receiving aldafermin vs 18% of patients receiving placebo (P = .10). NASH resolution with no worsening of fibrosis was observed in 24% of patients given aldafermin vs 9% of patients given placebo (P = .20). Discontinuations due to adverse events occurred in no patients in the aldafermin group and 4% of patients in the placebo group. Conclusions In a phase 2 trial of patients with NASH, aldafermin reduced liver fat and produced a trend toward fibrosis improvement. ClinicalTrials.gov, Number: NCT02443116.
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- 2020
12. Positive topline results from a 24-week, randomized, double-blind, placebo-controlled, multicenter, phase 2 study of the FGF19 analogue aldafermin (NGM282) in patients with non-alcoholic steatohepatitis
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Stephen A. Harrison, Guy Neff, Cynthia Guy, Mustafa Bashir, Angelo Paredes, Juan Frias, Ziad H. Younes, James F. Trotter, Nadege T. Gunn, Sam Moussa, Anita Kohli, Kristen Nelson, Mildred Gottwald, William Chang, Andrew Yan, Alex Depaoli, Lei Ling, and Hsiao Lieu
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Hepatology - Published
- 2020
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13. 140-LB: NGM313, a Novel Activator of b-Klotho/FGFR1c, Improves Insulin Resistance and Reduces Hepatic Fat in Obese, Nondiabetic Subjects
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Carine Beysen, Mustafa R. Bashir, Andrew Yan, Linda Morrow, Kenneth L. Luskey, Lei Ling, Jerrold M. Olefsky, Bryan Baxter, Van Phung, and Alex M. DePaoli
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0301 basic medicine ,medicine.medical_specialty ,business.industry ,Activator (genetics) ,Endocrinology, Diabetes and Metabolism ,Insulin ,medicine.medical_treatment ,Insulin sensitivity ,030209 endocrinology & metabolism ,Type 2 diabetes ,medicine.disease ,03 medical and health sciences ,030104 developmental biology ,0302 clinical medicine ,Insulin resistance ,Endocrinology ,Tolerability ,Internal medicine ,Internal Medicine ,medicine ,business ,Klotho ,Pioglitazone ,medicine.drug - Abstract
Background: NGM313 is a humanized monoclonal antibody activator of β-klotho/FGFR1c that has been shown to reduce HOMA-IR in obese subjects. This study compared the effects of a single dose of NGM313 vs. daily pioglitazone (PIO) on insulin sensitivity, liver fat content (LFC) and lipids in insulin resistant, obese subjects with increased liver fat. Methods: 25 subjects were randomized 2:1 to either a single dose of NGM313 240 mg SC (n=17) or PIO 45 mg PO QD (n=8) for 36 days. Whole-body insulin sensitivity was determined by a two-step hyperinsulinemic, euglycemic clamp and LFC by magnetic resonance imaging-proton density fat fraction (MRI-PDFF). Results: (Table 1) A single dose of NGM313 significantly increased glucose disposal rate and was comparable to PIO. Suppression of endogenous glucose production was enhanced by both NGM313 and PIO. Significant reductions in LFC, HbA1c, serum triglycerides and LDL-C, and an increase in HDL-C, were observed with NGM313. NGM313 produced a greater reduction in LFC vs. PIO at day 23. The safety and tolerability profile was favorable for both drugs. Conclusion: NGM313 is a potent insulin sensitizer, comparable to PIO. In addition, NGM313 is highly effective in reducing LFC in subjects with increased liver fat. As such, NGM313 has significant potential to be an effective treatment for nonalcoholic steatohepatitis and type 2 diabetes. Disclosure A. DePaoli: Employee; Self; NGM Biopharmaceuticals. V. Phung: Employee; Self; NGM Biopharmaceuticals. Stock/Shareholder; Self; NGM Biopharmaceuticals. M.R. Bashir: Consultant; Self; RadMD. Research Support; Self; Madrigal Pharmaceuticals, Metacrine Inc, NGM Biopharmaceuticals, Pinnacle Clinical Research, ProSciento, Siemens Corporation. L. Morrow: Employee; Spouse/Partner; Eli Lilly and Company. Employee; Self; ProSciento. C. Beysen: None. A. Yan: None. L. Ling: Employee; Self; NGM Biopharmaceuticals. Stock/Shareholder; Self; NGM Biopharmaceuticals. B. Baxter: Employee; Self; NGM Biopharmaceuticals. K.L. Luskey: Consultant; Self; NGM Biopharmaceuticals. J.M. Olefsky: None.
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- 2019
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14. Analysis of Three-Phase Transformer Response due to GIC Using an Advanced Duality-Based Model
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Luis Marti, Andrew Yan, Arun Narang, and Afshin Rezaei-Zare
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Engineering ,Isolation transformer ,Zigzag transformer ,business.industry ,020209 energy ,Linear variable differential transformer ,Energy Engineering and Power Technology ,02 engineering and technology ,Mechanics ,Distribution transformer ,Current transformer ,0202 electrical engineering, electronic engineering, information engineering ,Electronic engineering ,Energy efficient transformer ,Electrical and Electronic Engineering ,business ,Transformer effect ,Delta-wye transformer - Abstract
In this paper, the behavior of three-phase transformers in the presence of geomagnetically induced current (GIC) is investigated. The associated phenomena involve very slow transients, in the millihertz range, while representing significant magnitudes of even and odd harmonics of power frequency. As a result, the transformer response involves nonlinear and frequency-dependent effects. This paper considers the impact of variations in the transformer core construction and design parameters on its saturated behavior and the resulting reactive power absorption, when subjected to GIC. A detailed transformer model is described including air-gap and tank effects. The study results highlight significant parameters that can affect transformer reactive power and promote them as being important parameters for GIC studies. Furthermore, the transformer dynamics during the slow transient of the GIC variations and polarity reversal are discussed.
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- 2016
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15. The FGF19 analogue aldafermin improves non-invasive tests in patients with non-alcoholic steatohepatitis
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Marno Ryan, Stuart Roberts, Manal Abdelmalek, James F. Trotter, Angelo Paredes, Guy Neff, Andrew Yan, Alex DePaoli, Lei Ling, Hsiao Lieu, and Stephen Harrison
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Hepatology - Published
- 2020
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16. Aldafermin (NGM282) reduces the cross-linked pro-peptides of type III collagen PRO-C3X, a novel biomarker, in non-alcoholic steatohepatitis and primary sclerosing cholangitis patients
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Stephen Harrison, Lei Ling, James F. Trotter, Angelo Paredes, Andrew Yan, Ulrich Beuers, Gideon Hirschfield, Diana Leeming, Morten Karsdal, Alex DePaoli, and Hsiao Lieu
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Hepatology - Published
- 2020
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17. PS-108-NGM, a novel activator of beta-Klotho/FGFR1c: A single dose significantly reduces steatosis (liver fat by MRI-PDFF), inflammation (ALT, AST) and fibrogenic activity (Pro-C3) in NAFLD subjects
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Andrew Yan, Hui Tian, Bryan Baxter, Mustafa R. Bashir, Lei Ling, Van Phung, and Alex M. DePaoli
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medicine.medical_specialty ,Hepatology ,business.industry ,Activator (genetics) ,Inflammation ,Beta-Klotho ,medicine.disease ,Endocrinology ,Internal medicine ,Liver fat ,Medicine ,Steatosis ,medicine.symptom ,business - Published
- 2019
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18. Supporting the capacities and knowledge of small-holder farmers in Kenya for sustainable agricultural futures: A Citizen Science pilot project
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Andrew Yano, Jaqueline McGlade, Jerome Lewis, Marcos Moreu, Matthew Davies, Megan Laws, Muki Haklay, Samuel Lunn-Rockliffe, Timothy Kiprutto, and Wilson Kipkorir
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Citizen Science ,Sapelli ,smartphone ,co-design ,trans-disciplinary ,farmer ,Environmental technology. Sanitary engineering ,TD1-1066 ,Environmental sciences ,GE1-350 - Abstract
Sub-Saharan Africa is often presented as the continent most vulnerable to climatic change with major repercussions for food systems. Coupled with high rates of population growth and existing nutritional deficiencies, the need to enhance food production across the continent is thus seen as a major global imperative. We argue here, however, that current models of agricultural development in Eastern Africa often marginalise critical small-holder knowledge from the process of future agricultural design due to a lack of a methodological tools for engagement. This paper addresses this by outlining a potential means to capture and share locally produced agronomic information on a large scale. We report on a ‘Citizen Science’ pilot study that worked with smallholder farmers in Elgeyo-Marakwet County, western Kenya, to co-design a mobile application using the well-developed Sapelli platform that easily allows farmers to identify, record and geolocate cropping patterns and challenges at multiple stages in the agricultural calendar using their own understandings. The pilot project demonstrated the technical and epistemological benefits of co-design, the abilities of smallholder farmers to co-design and use smartphone applications, and the potential for such technology to produce and share valuable agricultural and ecological knowledge in real time. Proof-of-concept data illustrates opportunities to spatially and temporally track and respond to challenges related to climate, crop disease and pests. Such work expounds how smallholder farmers are a source of largely untapped ecological and agronomic expert knowledge that can, and should, be harnessed to address issues of future agricultural resilience and food system sustainability.
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- 2023
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19. Review of Template-Based Neuroimaging Tools in Neuro-Oncology: Novel Insights
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Jürgen Germann, Andrew Yang, Clement T. Chow, Brendan Santyr, Nardin Samuel, Artur Vetkas, Can Sarica, Gavin J. B. Elias, Mathew R. Voisin, Walter Kucharczyk, Gelareh Zadeh, Andres M. Lozano, and Alexandre Boutet
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magnetic resonance imaging ,neuro-oncology ,Montreal Neurological Institute brain ,MNI152 ,normalization ,Neoplasms. Tumors. Oncology. Including cancer and carcinogens ,RC254-282 - Abstract
Background: A common MRI reference space allows for easy communication of findings, and has led to high-impact discoveries in neuroscience. Brain MRI of neuro-oncology patients with mass lesions or surgical cavities can now be accurately transformed into reference space, allowing for a reliable comparison across patients. Despite this, it is currently seldom used in neuro-oncology, leaving analytic tools untapped. The aim of this study was to systematically review the neuro-oncology literature utilizing reference space. Methods: A systematic review of the neuro-oncology publications was conducted according to PRISMA statement guidelines. Studies specially reporting the use of the Montreal Neurological Institute (MNI) reference space were included. Studies were categorized according to their type of input data and their contributions to the field. A sub-analysis focusing on connectomics and transcriptomics was also included. Results: We identified only 101 articles that utilized the MNI brain in neuro-oncology research. Tumor locations (n = 77) and direct electrocortical stimulation (n = 19) were the most common source of data. A majority of studies (n = 51) provided insights on clinical factors such as tumor subtype, growth progression, and prognosis. A small group of studies (n = 21) have used the novel connectomic and transcriptomic tools. Conclusions: Brain MRI of neuro-oncology patients can be accurately transformed to MNI space. This has contributed to enhance our understanding of a wide variety of clinical questions ranging from tumor subtyping to symptom mapping. Many advanced tools such as connectomics and transcriptomics remain relatively untapped, thereby hindering our knowledge of neuro-oncology.
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- 2022
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20. Canada Acute Coronary Syndrome Risk Score: A new risk score for early prognostication in acute coronary syndromes
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Thao, Huynh, Simon, Kouz, Andrew T, Yan, Andrew, Yan, Nicolas, Danchin, Jennifer, O'Loughlin, Jennifer O, Loughlin, Erick, Schampaert, Raymond T, Yan, Raymond, Yan, Stephane, Rinfret, Jean-Claude, Tardif, Mark J, Eisenberg, Marc, Afilalo, Alice, Chong, Jean-Pierre, Dery, Michel, Nguyen, Claude, Lauzon, Samer, Mansour, Dennis T, Ko, Jack V, Tu, and Shaun, Goodman
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Male ,Canada ,medicine.medical_specialty ,Acute coronary syndrome ,Risk Assessment ,law.invention ,Electrocardiography ,Randomized controlled trial ,Risk Factors ,law ,Internal medicine ,Health care ,medicine ,Humans ,Hospital Mortality ,Registries ,Myocardial infarction ,Acute Coronary Syndrome ,Intensive care medicine ,Aged ,Framingham Risk Score ,medicine.diagnostic_test ,business.industry ,Middle Aged ,Prognosis ,medicine.disease ,Predictive value ,Survival Rate ,Medical training ,Female ,Cardiology and Cardiovascular Medicine ,business - Abstract
Despite the availability of several acute coronary syndrome (ACS) prognostic risk scores, there is no appropriate score for early-risk stratification at the time of the first medical contact with patients with ACS. The primary objective of this study is to develop a simple risk score that can be used for early-risk stratification of patients with ACS.We derived the risk score from the Acute Myocardial Infarction in Quebec and Canada ACS-1 registries and validated the risk score in 4 other large data sets of patients with ACS (Canada ACS-2 registry, Canada-GRACE, EFFECT-1, and the FAST-MI registries). The final risk score is named the Canada Acute Coronary Syndrome Risk Score (C-ACS) and ranged from 0 to 4, with 1 point assigned for the presence of each of these variables: age ≥75 years, Killip1, systolic blood pressure100 mm Hg, and heart rate100 beats/min. The primary end points were short-term (inhospital or 30-day) and long-term (1- or 5-year) all-cause mortality.The C-ACS has good predictive values for short- and long-term mortality of patients with ST-segment elevation myocardial infarction and non-ST-segment elevation ACS. The negative predictive value of a C-ACS score ≥1 is excellent at ≥98% (95% CI 0.97-0.99) for short-term mortality and ≥93% (95% CI 0.91-0.96) for long-term mortality. In other words, a C-ACS score of 0 can potentially identify correctly ≥97% short-term survivors and ≥91% long-term survivors.The C-ACS risk score permits rapid stratification of patients with ACS. Because this risk score is simple and easy to memorize and calculate, it can be rapidly applied by health care professionals without advanced medical training.
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- 2013
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21. Deep brain stimulation for substance use disorder: a systematic review and meta-analysis
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Nour Shaheen, Ahmed Shaheen, Can Sarica, Arun Singh, Mario Zanaty, Karim Johari, Andrew Yang, Theresa Zesiewicz, Brian Dalm, Yarema Bezchlibnyk, Andres M. Lozano, and Oliver Flouty
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addiction ,deep brain stimulation ,substance abuse ,alcohol ,heroin ,tobacco ,Psychiatry ,RC435-571 - Abstract
ObjectiveSubstance use disorder (SUD) is a significant public health issue with a high mortality rate. Deep brain stimulation (DBS) has shown promising results in treating SUD in certain cases. In this study, we conducted a meta-analysis to evaluate the efficacy of DBS in the treatment of SUD and reduction of relapse rates.MethodsWe performed a thorough and methodical search of the existing scientific literature, adhering to the PRISMA guidelines, to identify 16 original studies that fulfilled our inclusion criteria. We used the evidence levels recommended by the Oxford Centre for Evidence-Based Medicine to assess bias. The R version 4.2.3 software was utilized to calculate the mean effect size. We estimated study heterogeneity by employing tau2 and I2 indices and conducting Cochran’s Q test.ResultsThe results showed that DBS treatment resulted in a significant improvement in the clinical SUD scales of patients, with an average improvement of 59.6%. The observed relapse rate was 8%. The meta-analysis estimated a mean effect size of 55.9 [40.4; 71.4]. Heterogeneity analysis showed a large degree of heterogeneity among the included studies. Subgroup and meta-regression analysis based on age and SUD type suggested that DBS may be more effective for patients above 45 years of age, and for alcohol and opioid addiction compared to nicotine addiction.ConclusionThe current literature suggests that DBS has a moderate effect on SUD symptoms. However, the limited number of studies and small sample size indicate that more research is needed to better understand the factors that influence its effectiveness.
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- 2023
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22. Utilisation of waste bread for fermentative succinic acid production
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Koon Fung Lam, Carol Sze Ki Lin, Cho Chark Joe Leung, Andrew Yan-zhu Zhang, and Anaxagoras Siu Yeung Cheung
- Subjects
Environmental Engineering ,biology ,digestive, oral, and skin physiology ,Biomedical Engineering ,Proteolytic enzymes ,food and beverages ,Bioengineering ,Free amino nitrogen ,Raw material ,biology.organism_classification ,Hydrolysate ,chemistry.chemical_compound ,Actinobacillus succinogenes ,chemistry ,Biochemistry ,Succinic acid ,Fermentation ,Food science ,Aspergillus awamori ,Biotechnology - Abstract
A novel biorefinery concept of utilising waste bread as a sole nutrient source for the production of a nutrient rich feedstock for the fermentative succinic acid production by Actinobacillus succinogenes has been developed. Waste bread was used in the solid-state fermentations of Aspergillus awamori and Aspergillus oryzae that produce enzyme complexes rich in amylolytic and proteolytic enzymes, respectively. The resulting fermentation solids were added directly to a bread suspension to generate a hydrolysate containing over 100 g/L glucose and 490 mg/L free amino nitrogen (FAN). A first-order kinetic model was used to describe the effect of initial bread mass ratio on glucose and FAN profiles. The bread hydrolysate was used as the sole feedstock for A. succinogenes fermentations, which led to the production of 47.3 g/L succinic acid with a yield and productivity of 1.16 g SA/g glucose and 1.12 g/L h. This corresponds to an overall yield of 0.55 g succinic acid per g bread. This is the highest succinic acid yield compared from other food waste-derived media reported to date. The proposed process could be potentially utilised to transform no-value food waste into succinic acid, one of the future platform chemicals of a sustainable chemical industry.
- Published
- 2012
- Full Text
- View/download PDF
23. Optimal Medical Therapy for Non–ST-Segment–Elevation Acute Coronary Syndromes
- Author
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Anatoly Langer, Alan Bagnall, Raymond T. Yan, Mary Tan, David Fitchett, Shaun Goodman, Carolyn Baer, Cindy H. Lee, Andrew Yan, and Petr Polasek
- Subjects
Male ,medicine.medical_specialty ,Acute coronary syndrome ,Pediatrics ,Patients ,Adrenergic beta-Antagonists ,Risk Assessment ,Decision Support Techniques ,Medication Adherence ,Physicians ,Secondary Prevention ,medicine ,Humans ,Prospective Studies ,Acute Coronary Syndrome ,Prospective cohort study ,Aged ,Evidence-Based Medicine ,business.industry ,ST elevation ,Evidence-based medicine ,Guideline ,Middle Aged ,medicine.disease ,Patient Discharge ,Discontinuation ,Prescriptions ,Telephone interview ,Practice Guidelines as Topic ,Emergency medicine ,Female ,Guideline Adherence ,Cardiology and Cardiovascular Medicine ,Risk assessment ,business ,Platelet Aggregation Inhibitors - Abstract
Background— Acute coronary syndrome (ACS) patients in the highest risk categories are least likely to receive evidence-based treatments (EBTs). We sought to determine why physicians do not prescribe EBTs for patients with non–ST-segment–elevation ACSs and the factors determining use of these treatments after 1 year. Methods and Results— One thousand nine hundred fifty-six non–ST-segment-elevation ACS patients were enrolled in the prospective, multicenter Canadian ACS registry II between October 2002 and December 2003. Each patient's physician gave reasons why guideline-indicated medication(s) was not prescribed during hospitalization. Medication use and reason(s) for discontinuation after 1 year were obtained by telephone interview of the patients. The commonest reason for not prescribing EBTs was “not high-enough risk” or “no evidence/guidelines to support use.” However, Global Registry of Acute Coronary Events scores of patients not treated for this reason were often similar to or higher than those of patients prescribed such treatment. After 1 year, 77% of patients not on optimal ACS treatment at discharge remained without optimal treatment, and overall antiplatelet, β-blocker, and angiotensin-converting enzyme inhibitor use declined. Approximately one third of patients not taking EBTs had stopped their medication without instruction from their doctor. Conclusions— Nonprovision of EBTs may be due to subjective underestimation of patient risk and hence, likely treatment benefit. Oversights in care delivery were also apparent. Objective risk stratification, combined with efforts to ensure provision and adherence to EBTs, should be encouraged.
- Published
- 2010
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24. A Way Forward for Electric Vehicle in Greater Bay Area: Challenges and Opportunities for the 21st Century
- Author
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Yui-Yip Lau, Andrew Yang Wu, and Mak Wing Yan
- Subjects
Greater Bay Area ,internal combustion engines vehicles ,electric vehicles ,Mechanical engineering and machinery ,TJ1-1570 ,Machine design and drawing ,TJ227-240 ,Motor vehicles. Aeronautics. Astronautics ,TL1-4050 - Abstract
The Greater Bay Area (GBA) accounts for a high percentage of pollution due to the large number of internal combustion engines. In the past few decades, there has been a significant increase in internal combustion engines vehicles while electric vehicles have not taken off yet in GBA. To a certain extent, the acceptance of electric vehicles is still questionable from the industrial practitioners and local communities. As such, this research study aims to identify the challenges and opportunities of electric vehicles in GBA to address the future direction of electric vehicles in GBA. In this study, it identifies technology and economy as the main driving forces behind the development of electric vehicles. Furthermore, sustainability, safety, and the life of the batteries may induce the slow adoption of electric vehicles. As expected, the study develops a research agenda and contributes new knowledge in the field of electric vehicle.
- Published
- 2022
- Full Text
- View/download PDF
25. Do cientista ao ativista: os problemas da ciência do texto e uma solução revolucionaria na obra de Terry Eagleton
- Author
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Marinho, Andrew Yan Solano, Oliveira, Andrey Pereira de, Sousa, Elri Bandeira de, and Fajardo, Gerardo Andres Godoy
- Subjects
LINGUISTICA, LETRAS E ARTES::LINGUISTICA [CNPQ] ,Terry Eagleton. Criticism. Theory of literature. Literary science. Activism ,Terry Eagleton. Crítica. Teoria da literatura. Ciência literária. Ativismo - Abstract
Conselho Nacional de Desenvolvimento Científico e Tecnológico The literary critic Terry Eagleton obtained notoriety in academic circles when he was recognized intellectually for his bestselling book Literary Theory: An Introduction. In this book, the English author boldly proposes the end of literature and literary criticism. However, Eagleton proposed years before, in his book Criticism and Ideology (1976), a scientific system of analysis of literary texts, which seemed less radical, both in theory and in method, than in his later theoretical proposal. Based on this, the objective of this dissertation is to present the English literary critic´s initial method, explaining the reasons that led him to abandon his initial project - of develop a method of analysis of the literary text on a Marxist scientific perspective - and to propose, in the following years, in his most famous book and others, a revolutionary vision that would go beyond textual analysis and make literary texts have a practical intervention in society. Finally, we explain what would be his idea of revolutionary criticism O crítico literário Terry Eagleton obteve notoriedade no meio acadêmico ao ser reconhecido intelectualmente com seu livro best-seller Teoria da Literatura: uma introdução. Nesse livro, o autor inglês propõe, ousadamente, o fim da literatura e da crítica literária. Contudo, anos antes, Eagleton propôs, no livro Criticism and Ideology (1976), um sistema científico de análise do texto literário aparentemente menos radical, tanto em teoria quanto no método, que sua proposta teórica posterior. Com base nisso, o objetivo dessa dissertação é apresentar o método inicial do crítico literário inglês, explicitar os motivos que o levaram a abandonar seu projeto inicial de elaborar um método de análise do texto literário sobre uma ótica científica marxista e a propor, nos anos seguintes, em seu livro mais famoso e em outros, uma visão revolucionária, que iria muito além de análises textuais e faria os textos literários terem uma intervenção prática na sociedade. Por fim, explicitaremos qual seria sua ideia de crítica revolucionária
- Published
- 2014
26. A Quantitative Study of Software Reviews Using Content Analysis Methods
- Author
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Hongyu Zhang, Andrew Yang, Allen Peng, Lavinia F. Pieptea, Jian Yang, and Junhua Ding
- Subjects
Content analysis ,information quality ,quantitative study ,sentiment analysis ,text mining ,Electrical engineering. Electronics. Nuclear engineering ,TK1-9971 - Abstract
Online product reviews play a critical role for consumers to make a decision of product purchasing, and become an important data source for vendors to build recommendation systems. Some consumers won’t even buy a product without reading online reviews first, and some vendors invite reviewers to write product reviews before a product is released to the market. However, the review quality could greatly impact the use of the reviews for supporting the purchase decision and recommendation. In order to produce enough high-quality reviews, it is a common practice that vendors provide incentives for writing product reviews. Current research is divided. Some research showed that incentive reviews could be more biased compared to organic reviews, but other scholars showed incentive reviews contain more useful information. Furthermore, other academic publications showed very different results regarding the differences between the incentivized and organic reviews. One of the reasons explaining the observation differences could be due to the quality of the reviewers and reviews. Therefore, it is necessary to control the quality of the reviewers and their reviews for a more objective comparison. In this research, we first discuss an approach for ensuring the quality of the data collection and processing to ensure the quality of the comparison study. Then, we explore the differences between incentivized reviews and organic reviews collected from a website that provides reviews for enterprise software systems. Several parameters of the reviews, such as the overall score, sentiment, and subjectivity of the reviews, were analyzed and compared. Our results could provide a reference for appropriately using reviews and managing the reviewing process.
- Published
- 2022
- Full Text
- View/download PDF
27. Analysis of Geomagnetically Induced Currents
- Author
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Andrew Yan, Luis Marti, and Debbie Q. Zhou
- Subjects
Sunspot ,Earth's magnetic field ,Meteorology ,System impact ,Transmission (telecommunications) ,Coronal mass ejection ,Environmental science ,Power-flow study ,Geomagnetically induced current ,Power (physics) - Abstract
Sunspot activities can cause coronal mass ejections which interact with the Earth's magnetic field and can cause a Geomagnetic Disturbances (GMD) and subsequent widespread flows of Geomagnetically Induced Currents (GIC) in power grids. GMD events can impact the operational reliability of transmission networks over a wide geographical area. This paper describes the use of a real time GIC simulation program rtGICsim to include the system impact of GMD into load flow analysis. It also presents validation results using the data available from the March 13-9 GMD event. Lastly, it presents system study results used in the development of key instructions for operators during severe GMD events.
- Published
- 2013
- Full Text
- View/download PDF
28. Modelling considerations for the Hydro One real-time GMD management system
- Author
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Andrew Yan, Afshin Rezaei-Zare, and Luis Marti
- Subjects
Engineering ,business.industry ,Control engineering ,AC power ,law.invention ,Geomagnetically induced current ,Earth's magnetic field ,Power system simulation ,law ,Large networks ,Management system ,Electronic engineering ,Transformer ,business - Abstract
Hydro One (Ontario, Canada) has implemented a Geomagnetic Disturbances (GMD) management system in its control centre that combines real-time tracking of GMD events as well as an assessment of Geomagnetically Induced Currents (GIC) on every circuit and transformer in the 230 kV and 500 kV networks from magnetic field measurements. Transformer reactive power loss and hot spot heating due to half-cycle saturation of every transformer with a grounded winding above 230 kV is also estimated. The computational demands in real time required modeling techniques not usually associated with GIC simulations in large networks. This paper describes the modeling approach, capabilities, and usage to make real-time operational decisions during a GMD event.
- Published
- 2013
- Full Text
- View/download PDF
29. Determination of distributed generation capacity from a voltage regulation perspective
- Author
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Luis Marti, Lianxiang Tang, Andrew Yan, and John Fuerth
- Subjects
Engineering ,business.industry ,Electrical engineering ,AC power ,Electronic mail ,law.invention ,Control theory ,Overvoltage ,law ,Distributed generation ,Voltage regulation ,business ,Transformer ,Low voltage ,Voltage - Abstract
The Voltage-Power (V-P) relationship at the Point of Common Connection (PCC) of Distributed Generators (DG) identifies the overvoltage condition due to DG connections. However, overvoltages are not the only consideration. In the connection of DG in distribution and subtransmission feeders voltage fluctuation and instability are also important issues. This paper provides a systematic analysis of the voltage regulation issue, presents a practical and conservative approach to maximize the DG capacity of a Transformer Station (TS) and to minimize voltage fluctuation while keeping the feeder voltage within an acceptable range, with minimum modification to existing voltage regulating facilities. The approach not only takes into account voltage performance at the PCCs, but also at the TS bus, therefore the entire TS.
- Published
- 2012
- Full Text
- View/download PDF
30. Utility of Fibroscan XL to assess the severity of non-alcoholic fatty liver disease in patients undergoing bariatric surgery
- Author
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Andrew Yang, Melinda Nguyen, Irene Ju, Anthony Brancatisano, Brendan Ryan, and David van der Poorten
- Subjects
Medicine ,Science - Abstract
Abstract Significant weight loss can modify the progression of Nonalcoholic fatty liver disease (NAFLD) with the most convincing evidence coming from bariatric surgery cohorts. Effective ways to non-invasively characterise NAFLD in these patients has been lacking, with high Fibroscan failure rates reported. We prospectively evaluated the utility of Fibroscan using XL-probe over a two-year period. 190 consecutive patients undergoing bariatric surgery were followed as part of their routine care. All patients had Fibroscan performed on the day of surgery and at follow-up a mean of 13 months (± 6.3) later. The majority of patients were female (82%) with mean age of 42. Fibroscan was successful in 167 (88%) at baseline and 100% at follow up. Patients with a failed Fibroscan had higher body mass index (BMI) and alanine transaminase (ALT), but no difference in FIB-4/NAFLD score. Mean baseline Liver stiffness measurement was 5.1 kPa, with 87% of patients classified as no fibrosis and 4% as advanced fibrosis. Mean baseline controlled attenuation parameter was 291, with 78% having significant steatosis, 56% of which was moderate-severe. Significant fibrosis was associated with higher BMI and HbA1c. Significant steatosis was associated with higher BMI, ALT, triglycerides and insulin resistance. Mean follow up time was 12 months with weight loss of 25.7% and BMI reduction of 10.4 kg/m2. Seventy patients had repeat fibroscan with reductions in steatosis seen in 90% and fibrosis in 67%. Sixty-four percent had complete resolution of steatosis. Fibroscan can be performed reliably in bariatric cohorts and is useful at baseline and follow-up. Significant steatosis, but not fibrosis was seen in this cohort with substantial improvements post-surgery.
- Published
- 2021
- Full Text
- View/download PDF
31. An Unusally Diverse Array of Products Formed upon Carbonylation of a Dialkylniobium Complex
- Author
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Neil C. Tomson, John Arnold, Robert G. Bergman, and Andrew Yan
- Subjects
Alkylation ,Acylation ,Niobium ,Photochemistry ,Biochemistry ,Catalysis ,Article ,Metal ,chemistry.chemical_compound ,Colloid and Surface Chemistry ,Alkanes ,Organometallic Compounds ,Reactivity (chemistry) ,Group 2 organometallic chemistry ,Carbon Monoxide ,General Chemistry ,Ketones ,Combinatorial chemistry ,Product distribution ,Carbon ,chemistry ,Models, Chemical ,visual_art ,Intramolecular force ,visual_art.visual_art_medium ,Imines ,Carbonylation ,Carbon monoxide ,Hydrogen - Abstract
The reaction of carbon monoxide with a beta-diketiminato dimethyl niobium complex (BDI)Me2Nb(NtBu) is shown to lead to a variety of products whose distribution displays a remarkable dependence on the reaction conditions. Among these, the products of metal reduction, enediolate formation, and intramolecular C-H activation have been fully characterized. An investigation into the individual steps leading to these products points to a transient initial monoacyl complex, whose fate may be perturbed via reaction conditions to allow for control over the product distribution. Furthermore, the reaction of (BDI)Me2Nb(NCMe3) with XylNC (Xyl = 2,6-Me2C6H3) yields the eta2-ketimine complex (BDI)(Me2C=NXyl)Nb(NCMe3), whose characterization and reactivity enhance our understanding of the sequences involving CO.
- Published
- 2008
32. Cardiorenal Syndrome in COVID-19 Patients: A Systematic Review
- Author
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Ling Lin, Yangqin Chen, Dongwan Han, Andrew Yang, Amanda Y. Wang, and Wenjie Qi
- Subjects
cardiorenal syndrome (CRS) ,COVID-19 ,SARS-CoV-2 ,cardiac complications ,renal complications ,Diseases of the circulatory (Cardiovascular) system ,RC666-701 - Abstract
AimsTo perform a systematic review assessing the clinical manifestations and outcomes of cardiorenal syndrome or the presence of both cardiac and renal complications in the 2019 coronavirus disease (COVID-19) patients.MethodsAll relevant studies about cardiorenal syndrome or both cardiac and renal complications in COVID-19 patients were retrieved on PUBMED, MEDLINE, and EMBASE from December 1, 2019 to February 20, 2022.ResultsOur search identified 15 studies including 637 patients with a diagnosis of cardiorenal syndrome or evidence of both cardiac and renal complications followingSARS-CoV-2 infection. They were male predominant (66.2%, 422/637), with a mean age of 58 years old. Cardiac complications included myocardial injury (13 studies), heart failure (7 studies), arrhythmias (5 studies), or myocarditis and cardiomyopathy (2 studies). Renal complications manifested as acute kidney injury with or without oliguria. Patients with cardiorenal injury were often associated with significantly elevated levels of inflammatory markers (CRP, PCT, IL-6). Patients with a diagnosis of cardiorenal syndrome or evidence of both cardiac and renal complications had more severe disease and poorer prognosis (9 studies).ConclusionThe presence of either cardiorenal syndrome or concurrent cardiac and renal complications had a significant impact on the severity of the disease and the mortality rate among patients with COVID-19 infection. Therefore, careful assessment and management of potential cardiac and renal complications in patients with COVID-19 infection are important to improve their outcomes.
- Published
- 2022
- Full Text
- View/download PDF
33. Annexin A5 as an immune checkpoint inhibitor and tumor-homing molecule for cancer treatment
- Author
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Tae Heung Kang, Jung Hwa Park, Andrew Yang, Hyun Jin Park, Sung Eun Lee, Young Seob Kim, Gun-Young Jang, Emily Farmer, Brandon Lam, Yeong-Min Park, and Chien-Fu Hung
- Subjects
Science - Abstract
AnnexinV has been shown to bind phosphatidylserine expressed by chemotherapy-induced apoptotic cells increasing their immunogeneicity. Here, the authors demonstrate in a preclinical tumor model that fusing tumor-antigen peptide to Annexin V enhances its efficacy when administered after chemotherapy and with other immune checkpoint inhibitors.
- Published
- 2020
- Full Text
- View/download PDF
34. Valorisation of bakery waste for succinic acid production
- Author
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Zhang, Andrew Yan-zhu, primary, Sun, Zheng, additional, Leung, Cho Chark Joe, additional, Han, Wei, additional, Lau, Kin Yan, additional, Li, Mingji, additional, and Lin, Carol Sze Ki, additional
- Published
- 2013
- Full Text
- View/download PDF
35. Valorisation of bakery waste for succinic acid production
- Author
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Kin Yan Lau, Carol Sze Ki Lin, Cho Chark Joe Leung, Andrew Yan-zhu Zhang, Zheng Sun, Mingji Li, and Wei Han
- Subjects
biology ,Chemistry ,Free amino nitrogen ,Raw material ,biology.organism_classification ,Pollution ,Hydrolysis ,Actinobacillus succinogenes ,chemistry.chemical_compound ,Food waste ,Succinic acid ,Environmental Chemistry ,Fermentation ,Food science ,Valorisation - Abstract
In this paper, bakery waste, including cakes and pastries from Starbucks Hong Kong, was evaluated for the potential of succinic acid (SA) production. Through simultaneous hydrolysis and fungal autolysis, both cake and pastry hydrolysates were found to be rich in glucose (35.6 and 54.2 g L−1) and free amino nitrogen (685.5 and 758.5 g L−1), whereas the protein hydrolysis yields were 23.2 and 22.5%, respectively. These cake and pastry hydrolysates, together with magnesium carbonate (10 g L−1) were subsequently used as feedstock in Actinobacillus succinogenes fermentation, and the resultant SA concentrations were 24.8 and 31.7 g L−1, respectively. A cation-exchange resin-based process (via vacuum distillation and crystallisation) was subsequently used to recover the SA crystals from fermentation broth, and a high SA crystal purity (96–97.7%) was obtained. Results of the present work successfully demonstrated the novel use of bakery waste as the generic feedstock for the sustainable production of SA as a platform chemical in food waste biorefinery.
- Published
- 2013
- Full Text
- View/download PDF
36. TLR9 acts as a sensor for tumor-released DNA to modulate anti-tumor immunity after chemotherapy
- Author
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Tae Heung Kang, Chih-Ping Mao, Young Seob Kim, Tae Woo Kim, Andrew Yang, Brandon Lam, Ssu-Hsueh Tseng, Emily Farmer, Yeong-Min Park, and Chien-Fu Hung
- Subjects
Toll-like receptor 9 ,Tumor DNA ,Chemotherapy ,Neoplasms. Tumors. Oncology. Including cancer and carcinogens ,RC254-282 - Abstract
Abstract The tumor microenvironment exists in a state of dynamic equilibrium, in which a balance of agonist and antagonist signals govern the anti-tumor immune responses. Previous studies have shown that chemotherapy could shift this balance in favor of agonistic signals for the anti-tumor immune responses mounted by CD8+ cytotoxic T lymphocytes (CTL), providing sufficiently high antigen density within the tumor. We undertook the current study to characterize the anti-tumor immune response following chemotherapy and its underlying mechanisms. We show that this ‘adjuvant effect’ of chemotherapy is, at least partially, mediated by the release of tumor DNA and acts through the Toll-like receptor 9 (TLR9) pathway. We found that tumor-released DNA causes accumulation, antigen uptake, and maturation of dendritic cells (DCs) in the tumor in a TLR9-dependent manner. These DCs subsequently migrate into the draining lymph nodes and prime tumor-specific CTLs. Our study provides novel insights to the molecular and cellular mechanisms by which chemotherapy converts the tumor microenvironment into a site permissive for the activation of a potent tumor-specific adaptive immune response.
- Published
- 2019
- Full Text
- View/download PDF
37. CLERUCHY IN ETRUSCANS
- Author
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Andrew Yanko
- Subjects
etruscans ,etruscan language ,etruscan inscriptions ,onomastics ,cleruchy. ,Archaeology ,CC1-960 ,Ancient history ,D51-90 - Abstract
The author examines the inscription from Montepulciano, outskirts of Clusium (today Chiusi) (cippus Bucellius), where the Greek Dorian term was mentioned, which means a military colonist. Taking in consideration previous researches, the author tries to prove prescription of cippus Bucellius as a boundary; explain earlier date of the inscription (earlier 3rd, not 2nd centuries BC); represent own explanation of discussion terms, namely, ser is considered as reduction of the praenomen servei; hilar is determined as a plot of land; claruχieś is seen as a genitive case of term which means a military colonist-mercenary, created like the personal Etruscan names.
- Published
- 2020
- Full Text
- View/download PDF
38. Proposing a New Theorem to Determine If an Algebraic Polynomial Is Nonnegative in an Interval
- Author
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Ke-Pao Lin, Yi-Fan Wang, Ruo-Yu Wang, and Andrew Yang
- Subjects
algebraic polynomial ,trigonometric polynomials ,nonnegative ,Wang-Yau Lemma ,Sturm’s Theorem ,Yau Number Theoretic Conjecture ,Mathematics ,QA1-939 - Abstract
We face the problem to determine whether an algebraic polynomial is nonnegative in an interval the Yau Number Theoretic Conjecture and Yau Geometric Conjecture is proved. In this paper, we propose a new theorem to determine if an algebraic polynomial is nonnegative in an interval. It improves Wang-Yau Lemma for wider applications in light of Sturm’s Theorem. Many polynomials can use the new theorem but cannot use Sturm’s Theorem and Wang-Yau Lemma to judge whether they are nonnegative in an interval. New Theorem also performs better than Sturm’s Theorem when the number of terms and degree of polynomials increase. Main Theorem can be used for polynomials whose coefficients are parameters and to any interval we use. It helps us to find the roots of complicated polynomials. The problem of constructing nonnegative trigonometric polynomials in an interval is a classical, important problem and crucial to many research areas. We can convert a given trigonometric polynomial to an algebraic polynomial. Hence, our proposed new theorem affords a new way to solve this classical, important problem.
- Published
- 2021
- Full Text
- View/download PDF
39. A novel function of API5 (apoptosis inhibitor 5), TLR4-dependent activation of antigen presenting cells
- Author
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Young Seob Kim, Hyun Jin Park, Jung Hwa Park, Eun Ji Hong, Gun-Young Jang, In Duk Jung, Hee Dong Han, Seung-Hyun Lee, Manh-Cuong Vo, Je-Jung Lee, Andrew Yang, Emily Farmer, T.-C. Wu, Tae Heung Kang, and Yeong-Min Park
- Subjects
api5 ,dendritic cells ,cancer vaccines ,adjuvants ,tlr4 ,Immunologic diseases. Allergy ,RC581-607 ,Neoplasms. Tumors. Oncology. Including cancer and carcinogens ,RC254-282 - Abstract
Dendritic cell (DC)-based vaccines are recognized as a promising immunotherapeutic strategy against cancer. Various adjuvants are often incorporated to enhance the modest immunogenicity of DC vaccines. More specifically, many of the commonly used adjuvants are derived from bacteria. In the current study, we evaluate the use of apoptosis inhibitor 5 (API5), a damage-associated molecular pattern expressed by many human cancer cells, as a novel DC vaccine adjuvant. We showed that API5 can prompt activation and maturation of DCs and activate NFkB by stimulating the Toll-like receptor signaling pathway. We also demonstrated that vaccination with API5-treated DCs pulsed with OVA, E7, or AH1-A5 peptides led to the generation of OVA, E7, or AH1-A5-specific CD8 + T cells and memory T cells, which is associated with long term tumor protection and antitumor effects in mice, against EG.7, TC-1, and CT26 tumors. Additionally, we determined that API5-mediated DC activation and immune stimulation are dependent on TLR4. Lastly, we showed that the API5 protein sequence fragment that is proximal to its leucine zipper motif is responsible for the adjuvant effects exerted by API5. Our data provide evidence that support the use of API5 as a promising adjuvant for DC-based therapies, which can be applied in combination with other cancer therapies. Most notably, our results further support the continued investigation of human-based adjuvants.
- Published
- 2018
- Full Text
- View/download PDF
40. Intramuscular vaccination targeting mucosal tumor draining lymph node enhances integrins-mediated CD8+ T cell infiltration to control mucosal tumor growth
- Author
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Jin Qiu, Shiwen Peng, Andrew Yang, Ying Ma, Liping Han, Max A. Cheng, Emily Farmer, Chien-Fu Hung, and T.-C. Wu
- Subjects
immunotherapy ,mucosal immunity ,tumor draining lymph node ,lpam-1 ,cd49a ,Immunologic diseases. Allergy ,RC581-607 ,Neoplasms. Tumors. Oncology. Including cancer and carcinogens ,RC254-282 - Abstract
Purpose: Mucosal immunization is suggested to be crucial for controlling tumors in the mucosal region; however, therapeutic DNA vaccination with electroporation in various mucosal sites has yet to become clinically adaptable. Since tumor-draining lymph nodes (tdLNs) have been suggested as immune-educated sites that can be utilized to mount a potent antitumor immune response, we examined whether intramuscular DNA vaccination with electroporation at sites that target the mucosal tdLNs could elicit mucosal immune response to restrict tumor growth. Experimental Design: The efficacy and mechanism of intramuscular administration of a therapeutic DNA vaccine with electroporation at different sites was examined by lymphocyte analysis, tumor growth, mouse survival, as well as integrin expression, in mice bearing orthotopic HPV16 E6/E7+ syngeneic TC-1 tumors in various mucosal areas. Results: While provoking comparable systemic CD8+ T cell responses, intramuscular hind leg vaccination generated stronger responses in cervicovaginal-draining LNs to control cervicovaginal tumors, whereas intramuscular front leg vaccination generated stronger responses in oral-draining LNs to control buccal tumors. Surgical removal of tdLNs abolished the antitumor effects of therapeutic vaccination. Mucosal-tdLN-targeted intramuscular vaccination induced the expression of mucosal-homing integrins LPAM-1 and CD49a by tumor-specific CD8+ T cells in the tdLNs. Inhibition of these integrins abolished the therapeutic effects of vaccination and the infiltration of tumor-specific CD8+ T cells into mucosal tumors. Conclusions: Our findings demonstrate that tumor draining lymph nodes targeted intramuscular immunization can effectively control mucosal tumors, which represents a readily adaptable strategy for treating mucosal cancers in humans.
- Published
- 2018
- Full Text
- View/download PDF
41. Multi-Mode Stabilization of Torsional Oscillations Using Output Feedback Excitation Control
- Author
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Andrew Yan and Yao-nan Yu
- Subjects
Engineering ,business.industry ,General Engineering ,Energy Engineering and Power Technology ,Resonance ,Signal ,Compensation (engineering) ,law.invention ,Capacitor ,Electric power system ,Power system simulation ,Control theory ,law ,Control system ,Sensitivity (control systems) ,Electrical and Electronic Engineering ,business - Abstract
The paper presents an output feedback excitation control to stabilize the torsional oscillations due to subsynchronous Resonance of a capacitor-compensated power system. The control design is based on an equivalent mass-spring model, modern control laws, and eigenvalue sensitivity technique. With a multiple signal feedback synthesized from a minimum number of system outputs, the control provides proper damping to all torsional modes. Computer simulation tests show that all oscillating modes can be stabilized simultanously for a wide range of capacitor compensation.
- Published
- 1982
- Full Text
- View/download PDF
42. GAME PHERSU: PRO ET CONTRA
- Author
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Andrew Yanko
- Subjects
etruscan, gladiatorial games, phersu,rome,etruria. ,Archaeology ,CC1-960 ,Ancient history ,D51-90 - Abstract
Having examined the frescoes from Tarquinia: the Tomb of Augurs, the Tomb of the Pulcinella, and the Tomb of the Olympiads dated back to the sixth century BCE that depict scenes with a personage Phersu, the author deals with Etruscan inscriptions, data of the Antique tradition about origin of scenic and gladiatorial games, as well as a number of interpretations of these scenes to prove that the Etruscan ritual ‘game Phersu’ is a prototype of the Roman gladiatorial games and ‘venatio’. Being a part of Etruscan funeral rite, the ritual game was a substitutive sacrifice that symbolised a fight of a human being against the demon of death Calu – an abductor of souls from the world of the living. The fight was supposed to be guided by an invisible and disguised power, being personified in the image of Phersu.
- Published
- 2015
- Full Text
- View/download PDF
43. Identification of common blood gene signatures for the diagnosis of renal and cardiac acute allograft rejection.
- Author
-
Li Li, Kiran Khush, Szu-Chuan Hsieh, Lihua Ying, Helen Luikart, Tara Sigdel, Silke Roedder, Andrew Yang, Hannah Valantine, and Minnie M Sarwal
- Subjects
Medicine ,Science - Abstract
To test, whether 10 genes, diagnostic of renal allograft rejection in blood, are able to diagnose and predict cardiac allograft rejection, we analyzed 250 blood samples from heart transplant recipients with and without acute rejection (AR) and with cytomegalovirus (CMV) infection by QPCR. A QPCR-based logistic regression model was built on 5 of these 10 genes (AR threshold composite score >37% = AR) and tested for AR prediction in an independent set of 109 samples, where it correctly diagnosed AR with 89% accuracy, with no misclassifications for AR ISHLT grade 1b. CMV infection did not confound the AR score. The genes correctly diagnosed AR in a blood sample within 6 months prior to biopsy diagnosis with 80% sensitivity and untreated grade 1b AR episodes had persistently elevated scores until 6 months after biopsy diagnosis. The gene score was also correlated with presence or absence of cardiac allograft vasculopathy (CAV) irrespective of rejection grade. In conclusion, there is a common transcriptional axis of immunological trafficking in peripheral blood in both renal and cardiac organ transplant rejection, across a diverse recipient age range. A common gene signature, initially identified in the setting of renal transplant rejection, can be utilized serially after cardiac transplantation, to diagnose and predict biopsy confirmed acute heart transplant rejection.
- Published
- 2013
- Full Text
- View/download PDF
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