Low Inductance Research Articles

Investigation of the induction time and recovery in a flotation column: A kinetic analysis

ABSTRACT The recovery of coal particles in a flotation column was investigated to determine its dependency on the type of frother, particle size, and gas and feed velocities. The kinetics of the cumulative recovery was established. The induction time and flotation rate constant were analyzed based on the recovery, incorporating the stability, attachment, and collision efficiencies of the particles with the bubbles. An inverse relationship between recovery and induction time was observed. Recovery of the particles was noticed to increase with superficial air velocity and frother dose, while it decreased with increasing particle size and feed circulation velocity. The induction time decreases with increasing superficial air velocity and frother dose but increases with increasing particle size and feed circulation velocity. Low induction time and high recovery were observed in the cationic frother. Small particles with low induction time can be captured with ease and have excellent selectivity. A generalized correlation for the induction time was proposed based on experiments under different operating conditions. The presented research will be beneficial in terms of increasing the transport efficiency of flotation systems.

PERANCANGAN KOMPOR LISTRIK BERBASIS PANEL SURYA TERHADAP PENGARUH PANJANG COIL

Solar energy can be obtained easily and free of charge, but the conversion results are not entirely easy and free. In this study we tried to develop alternative energy from sunlight or solar panels as an energy source that can produce electrical energy (DC) as an energy source for electric stoves. The induction electric stove was self-assembled in this study with a cross-sectional area of ​​10 cm2. In testing the induction electric stove was used to heat water for 15 minutes. The test was carried out from 09:00 – 15:00 for 3 days using a coil with various coil lengths (1m, 2m, and 3m). The results showed that the coil length of 1 m resulted in the lowest inductance value of 125.6 x 10-9 H, and the lowest power of 119,025 Wh. While the coil with a length of 3 m produces the best inductance value of 376.8 x 10-9 H, and the best power of 125.235 Wh. The results showed that the greater the coil length value, the greater the inductance and power generated.

Coupled Inductors for High-Frequency Drives With Parallel-Connected Inverter Legs

In this article, coupled inductors with cross-coupled windings are described and designed for voltage source converters with parallel-connected inverter legs in each phase. The nature of the cross-coupled windings produces a very low effective series output inductance, related to the intralimb leakage inductance rather than the higher interlimb leakage. The effective inductance between the parallel inverter output terminals can be made high to reduce circulating currents and is related to inductor magnetizing inductance. These two features make the use of parallel inverters attractive for generating multilevel high-frequency fundamental pulsewidth modulation output voltages with a very low fundamental voltage drop across the coupled inductors. Sample magnetic designs are presented for a three-phase system using three inverter legs connected in parallel in each phase. The effective output inductance of the cross-coupled winding arrangement is compared with that of the coupled windings on separate limbs without cross-coupling and is shown to be 97% smaller. The performance of the two inductor winding arrangements is demonstrated with simulation and experimental results of an 11 kW (300 Vdc, 208 Vac/30 A) laboratory prototype operating with fundamental frequencies in the kilohertz range up to 5 kHz.

Design Procedure and Efficiency Analysis of a 99.3% Efficient 10 kW Three-Phase Three-Level Hybrid GaN/Si Active Neutral Point Clamped Converter

High-efficient and power-dense ac–dc power electronic converters are demanded for a wide range of applications, such as motor drives and active rectifiers. The utilization of wide bandgap devices, such as gallium-nitride (GaN) transistors, is a key feature to improve both the efficiency and the power density of power electronic converters. Owing to the superiority of GaN switches, this article achieves a high-efficiency three-level active-neutral-point-clamped converter. However, using GaN transistors is critically dependent on the layout configuration to achieve smooth switching transient and, as equally important, efficient cooling. Therefore, this article presents layout optimization and considers different layout configurations to achieve a low power loop inductance and as efficient heatsink assembly/performance. Two configurations of the switch boards are built by GaN/Si <sc xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">mosfet</small> s, and a power loop inductance comparison is presented. Furthermore, a comprehensive loss model is performed to fine-tune the switching frequency from the efficiency and the size point of view. A 10 kW laboratory prototype voltage source converter, including an electromagnetic interference (EMI) filter, is built with the switching frequency of 140 kHz. The efficiency measurement is performed and confirmed the full load efficiency of 99% and peak efficiency of 99.34%. Moreover, the CISPR11 Class A conducted EMI standard is fulfilled.

Induction mortality (IM) of acute myeloid leukemia (AML) patients treated with purine analogues-cytarabine-anthracycline at a general hospital.

e19019 Background: Cytarabine-anthracyclines (7+3) induction chemotherapy (IC)) has been the mainstay therapy for over four decades and it remains the standard AML IC regimen internationally. Triplet IC using purine analogues (fludarabine/cladribine) in combination with cytarabine and idarubicin (FIA/CLIA) is superior to the standard 7+3 regimen, but challenging to administer in general hospital settings due to myelosuppression. We reviewed AML IM rate in patients induced with (fludarabine/cladribine) combined with cytarabine and idarubicin (FIA/CLIA) at Memorial Hermann Hospital, Texas Medical Center (MHH at TMC). Patients and Methods: Of 44 AML reviewed records from January 2013 to January 2022, 40 received 5 days FIA/CLIA IC, and four 3-4 days due to age and comorbidities. For clinical characteristics see Table. Results: Median age was 51.5 years (range: 18-68). Three died before assessment. After 1 cycle the composite CR (CR+ CR i) was 82.9% (34/41) and 87.8% (36/41) after 2 cycles. MRD negative composite CR was 92%. Four patients had adverse risk cytogenetics and primary induction failure (modified FIA). 37% had febrile neutropenia. 25% had bacteremia with 15% requiring ICU admission and 4% mechanical ventilation. The 30-day induction mortality was 9%. Conclusions: FIA/CLIA has a higher CR rate than ‘3+7’ (which historically is 60%). The 30-day induction mortality in non-academic centers is about 30%. Given the fact that in AML achieving a CR is the most important factor to improve survival, with adequate treatment expertise, triplet IC regimen can be safely administered with a low induction mortality. [Table: see text]

A High Conversion Ratio and 97.4% High Efficiency Three-Switch Boost Converter With Duty-Dependent Charge Topology for 1.2-A High Driving Current and 20% Reduction of Inductor DC Current in MiniLED Applications

This article presents a three-switch (3S) boost converter with hysteresis current control applied in MiniLED panels. It uses only three power switches to achieve high conversion ratio (=7.5) and low inductor current (20% lower than conventional boost converters). Meanwhile, the charging time of the flying capacitor will increase as the duty cycle increases. It enables the proposed 3S boost converter to have a high drive current (=1.2 A). In addition, the right half-plane (RHP) zero of the proposed topology is related to the switching frequency. By dynamically adjusting the position of RHP zero during transients, the recovery time and output voltage drop can be reduced at the same time. When the load increases from 120 mA to 1.2 A, the recovery time can be accelerated to 42 <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$\mu \text{s}$ </tex-math></inline-formula> , and the maximum efficiency can reach 97.4%.

Identification of Mutations Associated With Macozinone-Resistant in Mycobacterium Tuberculosis.

Novel anti-tuberculosis drug macozinone (MCZ) is identified as a drug candidate and is currently under clinical development for the treatment of tuberculosis. However, the mutations conferring resistance to MCZ remain inadequately characterized. In this study we investigated resistant mutations to the MCZ through de novo resistance selection in vitro. This was accomplished by passing the Mycobacterium tuberculosis H37Rv on solid agar plates, which were infused with the antibiotic. Through whole genome sequencing and targeted PCR genomic resistance conferring SNPs were catalogued, and the resistant phenotype was analyzed by MABA test. Of MCZ-resistant clones obtained in vitro the mutation of C387S in dprE1 is only observed in high-level resistant clones (MIC90 > 500ng/mL) indicating that C387S mutation is directly related to high-level MCZ-resistance. In addition, high-level resistance to MCZ can occur in clone grew on agar plates infused with low concentration MCZ, which means low concentration MCZ induction can produce high-level drug-resistance and it is easy to produce high-level MCZ-resistance. We also found two new mutations (G61A and G248A) in dprE1 for the first time. The MIC90 of other clones except the clones carrying the C387S mutation was at the same level (20ng/mL > MIC90 > 2ng/mL). Of low-level resistant clones other gene mutations involved in drug efflux or membrane permeability were found (pepQ, Rv0678, arsC, etc.), with highest mutation frequency in Rv0678 (50/64, 78.12%). It suggests that there may be new mechanisms independent of dprE1 mutations.

A 3-alkylpyridine-bearing alkaloid exhibits potent antimicrobial activity against methicillin-resistant Staphylococcus aureus (MRSA) with no detectable resistance

Staphylococcus aureus is a Gram-positive bacterium responsible for a wide variety of infectious diseases, and its methicillin-resistant isolates pose a serious worldwide public health risk. New drugs are urgently needed for the treatment of methicillin-resistant Staphylococcus aureus (MRSA) infections. Here, we evaluated the antibacterial activity of five 3-alkyl-pyridinic analogs against MRSA and, of these compounds, compound 6 showed promising antibacterial activity against Staphylococcus with minimum inhibitory concentration (MIC) ranging from 0.98 to 3.9 μgmL–¹ . In addition, it exhibited a rapid bactericidal action, with complete elimination of MRSA after 6 h of incubation at 15.6 μgmL–¹ . Compound 6 had the ability to damage the bacterial membrane and induce cell lysis and, due to its action on the membrane, showed low resistance induction potential in vitro. In the combination study, compound 6 revealed an additive effect (FICI = 1) with vancomycin and ofloxacin and ciprofloxacin (FICI = 0.75) against MRSA, reducing the effective concentration of this antibiotic two-fold. The anti-staphylococcal activity of compound 6 was stable in the presence of different concentrations of NaCl (50, 200, and 400 µM), trypsin ( 1:500, 1:250) and under a variety of pH values (4, 5, 6, and 8); however, its binding to plasmatic proteins (i.e., albumin) was substantial. The previous exposure of MRSA to the compound was able to reduce the formation of bacterial biofilm and reduce the biomass of mature biofilms. Compound 6 showed low selectivity in vitro for MRSA USA 300 when compared to eukaryotic cells (epithelial, fibroblast, and red blood cells).

The Role of HnRNPA1 in T Cell-Mediated Gut Tolerance

Abstract Our previous research showed that Akt phosphorylation of the RNA-binding protein, (RBP) heterogeneous nuclear ribonucleoprotein (hnRNP) A1, is dependent on TCR signal strength, and occurs under conditions of induced T regulatory (Treg) cell differentiation. We have shown hnRNPA1 is required for optimal Treg differentiation by performing knockdown experiments, and our present research is focused on identifying a role for Akt phosphorylation in hnRNPA1 function. HnRNPA1 is phosphorylated by Akt at S199 and our lab has generated a new mutant mouse model, hnRNPA1-S199A (mA1), in which hnRNPA1 will no longer be Akt-phosphhorylated. Our initial characterization of mA1 mouse model failed to reveal major abnormalities in immune cells populations at steady state except for changes in the Treg proportion in the mesenteric lymph nodes. To investigate the effect of the mA1 on the development of oral tolerance we used an adoptive transfer model in which OT-II mA1 or OT-II WT naïve T cells were transferred into congenic strains and then the mice were given OVA food. Results indicate that mA1 OT-II T cells have a proliferation defect in vivo and we also observed a significant reduction in the induction of OVA-specific Treg in the mA1 T cells. Similar results were obtained when adoptively transferred OT-II mA1 T cells were challenged with limiting doses of specific peptide, given iv. RNASeq analysis of the transferred mA1 and WT T cells is being performed. These results suggest that Akt phosphorylation of hnRNPA1 is necessary for T cell response to low dose antigen and Treg induction in vivo. Our studies identify a new mechanism by which RBP influence T cell proliferation and Treg differentiation which has implications for tolerance to food antigens in the gut. Supported by NIH (F31-AI152320-02) NIH (R01-AI125513-03)

Glucose consumption of vascular cell types in culture; toward optimization of experimental conditions

Any experimental outcomes are potentially influenced by extracellular glucose availability and its cellular metabolism. However, there is a lack of attention paid to the supply and utilization of glucose in many cultured experiments. Surveillance of vascular‐related journals for the past 5 years demonstrated that less than 20% of published articles declared the medium glucose concentration. The present studies were designed to seek ideal medium glucose concentration(s) in various cell types with particular attention paid to changes in glucose consumption. By using distinct glucose concentrations in Dulbecco's Modified Eagle's medium (DMEM), we identified ideal glucose media for stimulation experiments. We have compared glucose consumption in three vascular cell types, endothelial cells (EC), vascular smooth muscle cells (VSMC) and adventitial fibroblasts (AF) with or without angiotensin II stimulation. In all cell types after a 48‐hour incubation in relatively low glucose media (1 g/L), medium glucose concentration was reduced to almost 0 (EC 0.01±0.01 g/L, VSMC 0.13±0.05 g/L, AF 0.02±0.01 g/L). Whereas medium glucose concentration remained significantly higher (EC 2.77±0.05 g/L, VSMC 3.87±0.05 g/L, AF 3.32±0.01 g/L) when cells were incubated for 48 hours in high glucose (4.5 g/L) media. In middle glucose (2.75 g/L) media, medium glucose concentration remained in physiological ranges (EC 0.62±0.18 g/L, VSMC 1.98±0.07 g/L, AF 1.17±0.17 g/L). AngII treatment enhanced glucose consumption in AF and VSMC but not in EC. Enhanced extracellular acidification rate by AngⅡ was observed in AF as well as VSMC. In AF, AngII induction of target proteins at 48 hours varied depending on the glucose concentration used. In low glucose media induction of Grp78 or hexokinase II was highest, whereas induction of vascular cell adhesion molecule‐1 was lowest. However, no glucose preference was seen in AngII‐induced c‐Fos induction at 1 hour in AF. Utilization of specific inhibitors further suggest essential roles of AT1 receptor and glycolysis in AngII‐induced fibroblast activation. Overall, the present study demonstrates a high risk of hypo‐ or hyperglycemic conditions when standard low or high glucose media is used with vascular cells. Moreover, these conditions may significantly alter experimental outcomes. Medium glucose concentration should be monitored during any culture experiments and utilization of middle glucose media is recommended for all vascular cell types.

Fatigue study of an inverse-designed low induction rotor using open-source tools

The current trend in wind turbine design leans toward increasing rotor diameter for increased energy capture. This presents a notable fatigue concern as blade loads increase with blade length. One solution to potentially alleviate the additional blade loading and improve the fatigue behavior of large-diameter wind turbines, while also reducing overall cost of energy, is the low-induction rotor. The purpose of this work is to perform a holistic analysis to assess the attainable benefits of a notional low-induction rotor variant of the DTU 10MW Reference Wind Turbine using multi-disciplinary open-source design and analysis tools. The notional low-induction rotor blade is designed using an inverse-design routine that allows for the direct specification of desired blade properties. To assess viability of the new rotor design, annual energy production and levelized cost of energy are considered along with fatigue at the blade root and the associated drivetrain and tower response to changes in blade loading. It is estimated that the proposed early-concept low-induction rotor design improves annual energy production by 6.35% (or 3 GW-h), resulting in a 4% (0.25 ¢/kW-h) reduction in levelized cost of energy. The low-thrust nature of the low-induction rotor design reduces root flap bending moment fatigue by up to 21.5%, and it is proposed that changes in blade root edgewise fatigue for the longer, heavier blades of the low-induction rotor can be alleviated with mass redistribution.

Geophysical field zoning for nitrogen fertilization in durum wheat (Triticum durum Desf.).

The current social context requires an increase in food production, improvement of its quality characteristics and greater environmental sustainability in the management of agricultural systems. Technological innovation plays a great role in making agriculture more efficient and sustainable. One of the main aims of precision farming (PF) is optimizing yield and its quality, while minimizing environmental impacts and improving the efficient use of resources. Variable rate techniques (VRT) are amongst the main management options for PF, and they require spatial information. This work incorporates maps of soil properties from low induction electromagnetic measurements into nitrogen (N) balance calculations for a field application of VRT nitrogen fertilization of (Triticum durum Desf., var. Tirex). The trial was conducted in 2018–19 at Genzano di Lucania (PZ, Italy) geologically located on the clayey hillsides of the Bradanica pit and the Sant’Arcangelo basin. Three soil homogeneous areas were detected through low induction electromagnetic measurements and used as uniform management zones. The amount of nitrogen fertilizer to be applied by VRT was calculated on the base of estimated crop nitrogen uptake and soil characteristics of each homogeneous area. Crop response to VRT was compared to uniform nitrogen application (UA) on the whole field. The application of VRT resulted in a reduction of 25% nitrogen fertilizer with the same level of yield respect to UA. Grain protein content, as well as gluten content and N content, were significantly higher in VRT than in UA. As a consequence of lower nitrogen input and higher levels of N removal, VRT reached a higher nitrogen use efficiency than UA, and this indicates a lower environmental impact and a higher economic profitability.

Sheet thickness dependence of magnetization properties based on domains and walls within the non-linear diffusion-like equation for grain-oriented electrical steels

The definition and development of a dynamic or transient magnetic formulation compatible with the Finite Element Method, able to take the dynamic hysteresis and classical and extra losses into account (not a posteriori but a priori), and using the most adapted state variable that makes the problem well defined and easily convergent requires the knowledge of dynamic behavioral properties of soft magnetic materials whatever the thickness and the working conditions. The dynamic hysteresis of soft magnetic materials corresponds to excess iron losses, due to dynamic magnetization reversal processes within magnetic domains and especially to microscopic eddy currents around the magnetic walls in motion and inside rotating domains. The model properties used are the internal quasi-static permeability μ and the dynamic magnetization property Λ that lumps the magnetization mechanisms (domain walls displacement, bowing, fusion, nucleation and multiplication). The latter are involved in the magnetic field damping due to microscopic eddy currents within the field diffusion that renders the magnetic behavior geometry dependent. This model does not separate the field diffusion process from the magnetization reversal mechanisms. In this paper, the sheet thickness ζ dependence of the dynamic magnetization property Λ(ζ) for a Grain Oriented Electrical Steel (GOES: steel made of 3% Silicon and Iron: SiFe) is analyzed in the Rolling Direction (RD). To this extend, it is proposed to carry out and interpret magnetic measurements on GOES samples with the Epstein frame for four different thicknesses (ζ = 0.23, 0.27, 0.30 and 0.35 mm), but with similar metallurgical and crystallographic properties for the whole specimens. Magnetic properties are first identified at low induction with linear assumptions and at higher induction with non-linearities. It makes it possible to re-compute the dynamic hysteresis loops of the material and to predict the losses whatever the working conditions with frequencies from 50 to 800 Hz. It is found that μ does not depend significantly on the sheet thickness whereas Λ depends on it significantly. Microscopic observation of the magnetic domains width are then performed thanks to the MOIF (Magneto-Optical Indicator Film) technique. It helps us discriminate between three simultaneous origins for the dependence of iron losses to the sheet thickness: a skin-like effect, a domains’ refinement and changes on the walls’ mobility. Results are discussed taking the dipolar magnetic effects, closure domains, the grains and texture and the manufacturing and coating residual stress on the metal surface into account.

Review of the designs in low inductance SiC half‐bridge packaging

Silicon carbide (SiC) device has become the primary choice for high-efficiency power electronic equipment due to its excellent performance. However, its higher switching frequency and faster switching speed have also incurred new challenges, such as low parasitic inductance packaging. Despite a significant amount of literature to overview the low parasitic inductance packages, most of them focus on total parasitic inductance from different packaging technology. Here, from the viewpoint of partial inductance which includes gate loop, power loop and common source, the designs for different inductances are surveyed. The power loop is further discussed from power terminals, bonding wires and direct bonded copper (DBC) conductor traces. The effects and sources of these inductances are analyzed. Furthermore, the typical design solutions to reduce the inductances are summarized. Finally, the challenges of SiC packages are presented.

Analysis and Verification of the Method of Improving Inductance by Magnetic Endcaps in Slotless Permanent Magnet Motor

The slotless permanent magnet motor (SPMM) has low phase inductance due to the larger physical air gap, which will adversely affect motor control and current harmonics. In this paper, the method of forming an extra magnetic circuit by endcap around the outer stator is proposed. The advantage of this method is that a restrained flux path is formed without increasing the motor structure and cost, and the inductance of the motor is effectively improved without causing a significant decrease in torque. The preliminary simulation analysis and corresponding experimental content are carried out. The experimental results and the simulation content showed good consistency, which verified the correctness of the theory and simulation analysis.

Participation Factor based analysis of PVSC type Multi-Input Zeta-SEPIC dc-dc converter

PurposeThis study aims to propose a new non-isolated Multi-Input Zeta-SEPIC (MIZS) dc–dc converter for renewable energy sources integration with different voltage levels (low-voltage source, high-voltage source). The chosen configuration of the converter is capable of performing bucking as well as boosting operations in various modes of operation.Design/methodology/approachParameters of the selected MIZS converter are designed using the time-domain analysis. The selected converter belongs to the sixth-order family with two switches and six energy storage elements. State-space model of the converter is developed for each mode of operation, and using these individual state-space models, an average state-space model of the converter useful to carry out detailed analysis for different operating conditions is developed. Analysis related to operational stability of the converter is also carried out using Participation Factor (PaF)-based Eigen value analysis.FindingsUsing the PaF-based Eigen analysis, participation of the various state variables in different Eigen modes and vice versa is carried out. Performance of the converter for different parameter variations in the allowable range is determined and the same has been used to find the operational stability of the converter under different modes of operation. The selected converter has low inductor ripple currents and output voltage ripples when delivering the power to load.Originality/valueBecause operational stability of the converter under various operating conditions is one of the key performance indicators for selecting a particular type of converter, PaF-based Eigen value analysis has been carried out using the average state-space model developed for the selected MIZS converter. Operational stability analysis of the converter is carried out for parameter variations also. In addition, participation of the various states in each Eigen mode and vice versa have been analyzed for designed parameter values and also variation within the specified range of variations.

Development and optimization of a Barley stripe mosaic virus-mediated gene editing system to improve Fusarium head blight resistance in wheat.

Development and optimization of a Barley stripe mosaic virus-mediated gene editing system to improve Fusarium head blight resistance in wheat.

Space-Vector-Optimized Predictive Control for Dual Three-Phase PMSM With Quick Current Response

This article proposes a scheme of space vector optimization for model predictive control (MPC) of dual three-phase permanent magnet synchronous machine (DTP-PMSM), which aims to restrain the current harmonics under the condition of low inductance. The multiphase electric motor possesses the characteristics of quick current variation rate by means of the low inductance. Especially incorporating with MPC schemes, its advantage of quick response shows promising prospects for various applications such as robotics, aerospace and medical devices. However, such a characteristic of low inductance requires shorter control period, which means that the traditional MPC cannot be implemented to suppress the current harmonics since the performance of the power switching devices and the digital controller limits the arbitrary increasing of the control frequency, which has nearly unexplored in previous studies. In order to address such an issue, this article presents the space-vector-optimized model predictive control (SVO-MPC) for the DTP-PMSMs with low inductance by presynthesizing space vectors to eliminate harmonics in the harmonic frame and optimizing the zero vector to deal with quick current response. As a result, the proposed SVO-MPC can remarkably improve the steady and dynamic control performance, while the traditional MPC almost fails at commonly-adopted control frequency. Finally, simulated and experimental results are both given to verify the feasibility of the proposed SVO-MPC for DTP-PMSMs with quick current response.

SARS-CoV-2 infection in the immediate post-transplant period: A report of five kidney transplant recipients

Introduction: The severe acute respiratory syndrome coronavirus 2 pandemic caused a negative impact on transplantation worldwide. One of the complexities is the management of the immunosuppression and anti-viral medication in transplant recipients. Herein we describe our experience managing five patients with coronavirus disease 2019 (COVID-19) immediately after kidney transplant. Description: we describe a series of five transplant recipients. Two were submitted to a low immunological risk induction immunosuppression: one developed severe disease, the other developed critical disease. The remaining three were submitted to a high immunologic risk immunosuppression: one developed mild disease, but approximately two months after diagnosis developed moderate COVID-19; another developed severe COVID-19; the remaining patient developed critical illness and perished. Both patients with critical COVID-19 developed bacterial and fungal superinfections in the Intensive Care Unit. All eligible patients were submitted to remdesivir and dexamethasone. The anti-metabolite was reduced or suspended. Despite worsening kidney function during the acute phase, kidney replacement therapy was only needed in one patient and the average serum creatinine at the time of discharge was lower that the pre-COVID-19 nadir. Discussion: There is still no definitive answer on whether solid organ transplant recipients carry a higher risk for morbimortality. Risk factors for the general population can also affect their outcome. The prolonged viral shedding in recipients may explain the irregular evolution of the patient who developed COVID-19 months after the initial diagnosis. The reduction of immunosuppression can be problematic in early post-transplant, but no apparent signs of rejection were noted. Literature addressing this specific context is scarce and studies are needed to clarify the optimal management of these patients.

Analytical all-induction state model for wind turbine wakes

Analytical wind turbine wake models are prone to failure when the turbine induction factor increases, as they do not account for the increasingly important effects of low wake pressure. This work proposes a novel analytical wake model which incorporates the effect of wake pressure in its predictions. Comparison with high-fidelity wind turbine simulations shows that the newly developed model is comparable to conventional ones at low induction factors, but continues to be accurate at higher induction factors where existing models break down.