Cytomegalovirus (CMV) reactivation in CMV-seropositive patients after haploidentical T-cell receptor αβ+/CD19+ depleted hematopoietic cell transplant (HCT) is high. Due to delayed CMV-specific immune reconstitution, patients may require prolonged antiviral therapy including secondary prophylaxis (SP). Valganciclovir is preferred for SP, however, antiviral options for SP could be limited in the setting of resistant CMV. We report successful off-label use of letermovir for SP in a haploidentical TCRαβ+/CD19+ depleted pediatric HCT recipient with resistant CMV disease, its pharmacokinetic parameters, and dose titration based on area under time concentration curve.

Gorham-Stout disease (GSD) and generalized lymphatic anomaly (GLA) are subtypes of complex lymphatic malformations (CLMs) with osseous involvement that cause significant complications in children, including pain and pathologic fractures. Mutations in cellular growth pathways are common, and the mTOR inhibitor sirolimus alleviates symptoms in some, but not all, patients. We describe two patients, one with GSD and one with GLA, who were found to have EML4::ALK fusions. This report of a targetable, oncogenic fusion in vascular malformations expands our understanding of the genetic basis for CLMs and suggesting additional targeted therapies could be effective.

Background and aims: Venous thromboembolism (VTE) is a common complication of malignancy associated with a three-fold increase risk of death. Pregnancy is also a recognized risk factor for VTE, and is associated with a 4-5 fold increase risk compared to non-pregnant women. Considering that any review article has not been published in this field yet and given that complications of VTE can be reduced by early identifying between pregnant women the current systematic review aimed to elucidate the impact of malignancy on the risk of VTE in pregnant females. Methods: We carried out a systematic search in multiple databases, including PubMed (Medline), Google Scholar, and Scopus up to January 2023. Finally, 441 related articles were extracted from the databases, after screening the title, abstract and full text, seven articles were included in the study. Results: Seven studies (6 cohorts and 1 cross-sectional) with an entire of 58,854,195 pregnant females (22,396 cancer patients) were included. These studies were done in the United States of America, Canada, Brazil, and Denmark. All of the studies except one study demonstrated that cancer in pregnant patients increased the risk of deep vein thrombosis (DVT). The VTE prevalence was significantly higher in cancer groups compared with the non-cancer group and the highest (adjusted odds ratio) aOR was correlated to myeloid leukemia. Conclusions: Pregnant women with malignancy are more susceptible to VTE and other coagulation disorders. Physicians and health policymakers should be of high vigilance to pregnancy-associated VTE, especially in women suffering from cancer.

Local adaptation to annually changing environments has evolved in numerous species. Seasonal coat colour change is an adaptation that has evolved in multiple mammal and bird species occupying areas that experience seasonal snow cover. It has a critical impact on fitness as predation risk may increase when an individual is mismatched against its habitat’s background colour. In this paper we investigate the impact of landscape covariates on moult timing in a native winter-adapted herbivore, the mountain hare (Lepus timidus), throughout Norway. Data was collected between 2011 and 2019 at 678 camera trap locations deployed across an environmental gradient. Based on this data, we created a Bayesian multinomial logistic regression model that quantified the correlations between landscape covariates and coat colour phenology and analysed among season and year moult timing variation. Our results demonstrate that mountain hare moult timing is strongly correlated with altitude and latitude with hares that live at higher latitudes and altitudes keeping their winter white coats for longer than their conspecifics that inhabit lower latitudes and altitudes. Moult timing was also weakly correlated with climate zone with hares that live in coastal climates keeping their winter white coats for longer than hares that live in continental climates. We found evidence of some among year moult timing variation in spring, but not in autumn. We conclude that mountain hare moult timing has adapted to local environmental conditions throughout Norway.

In latest years, with the gradual perception of CRISPR Cas9 technology, coupled with the many advantages of the CRISPR Cas9 system, ease of development, simplicity of use, and low material prices, its mediated gene modifying has been higher used in diagnosing and treating genetic ailments and enhancing patients' prognosis. Moreover, CRISPR Cas9 gene screening library is another hot issue which can be used to discover pathogenic genes, pick drug intervention sites, and analyze drug resistance mechanisms. Rapidly emerging gene editing technology has a huge market and is expected to cure B-cell lymphoma. This article reviews the application and progress of CRISPR Cas9 gene editing in B-cell lymphoma for further study.

In this work, the design of a novel single-bit third-order reconfigurable sigma delta analog-to-digital converter (ΣΔ ADC) for global ISM band (Bluetooth, Zigbee and Wi-Fi) radio receiver is presented. The novelty is based on the design of the delay components rather than the integrators commonly used in ΣΔ modulator. For this new architecture, the oversampling frequency is maintained for the different bands. Reconfigurability relies on changing the order of the modulator. Thus, In both Bluetooth and Zigbee bands, only the top two stages (2nd order mash 11) are used, and for the Wi-Fi band, all three stages are used (3rd order mash 111). The reconfigurable ADC die chip occupies an area of 0.30 mm2. The power consumption is approximately equal to 18.6mW using a 3.3V supply voltage. The SNR is about 118 dB for Bluetooth signal and Zigbee using 2nd order modulator and about 90 dB for Wi-Fi using 3rd order modulator.

Background and Purpose: Elamipretide is a mitochondrial-targeting agent being developed for the treatment of mitochondrial dysfunction-associated diseases. While prior studies have shown that subcutaneous elamipretide is generally safe/well tolerated, injection site reactions (ISRs) were reported in most subjects. We evaluated the efficacy of interventions to mitigate ISRs, identify underlying ISR mechanisms, and evaluate the pharmacokinetic and safety profile of subcutaneous elamipretide. Experimental Approach: Subcutaneous elamipretide 60 mg was administered to healthy subjects (N=10) on six separate occasions with/without potential ISR interventions (mometasone furoate, ice application, tacrolimus ointment, doxepin cream, and oral diphenhydramine). ISR clinical/self-assessments, blood samples, and safety data were collected at predetermined intervals. Preclinical studies investigated mast cell-specific receptor MRGPRX2 mediation of ISRs. Key Results: Mometasone significantly reduced the incidence of induration/swelling and pruritus. Diphenhydramine significantly decreased the incidence of induration; 50% reported somnolence. Ice application significantly reduced the incidence of pain, although it reduced elamipretide’s maximum plasma concentration and area-under-the-curve from time 0-6hrs versus elamipretide alone. Preclinical data suggest that SQ-elamipretide induced ISRs by activating MRGPRX2 in humans and its ortholog Mrgprb2 in mice. Conclusion and Implications: Elamipretide activated MRGPRX2 and Mrgprb2 receptors, resulting in activation of mast cells and inflammation in mouse models, suggesting that targeting mast-cell activation may ameliorate elamipretide ISRs. Topical mometasone prior to subcutaneous elamipretide demonstrated significant reductions in ISR signs and symptoms and did not cause significant changes in elamipretide plasma exposure or additional adverse events. Therefore, mometasone prior to subcutaneous injection of elamipretide warrants further investigation in clinical studies for alleviating ISRs.

Purpose: to determine the incidence of switching and the factors associated with the switch-free time of brand or generic imatinib. Methods: analytical, dynamic cohort, observational, prospective study, between January-2017 and January-2022. The exposed group was patients with brand drugs and the non-exposed with generic with 83 patients in each group. The dependent variable was switching from imatinib to another drug. Each patient was observed for 12 months. Absolute and relative frequencies and summary measures were used. Kaplan-Meier was performed to calculate switch-free time, spearman correlation, and chi 2 for measurements over time. Differences between measurements were established with Log-Rank-Test and variables with significance were input to a COX proportional hazards model. Results: the median time on treatment in exposed patients was 325 days [RIC 141-365] and in non-exposed patients 365 [RIC 179-365] (p-value: 0.2616). Of those exposed and non-exposed, 20.5% and 26.5%, respectively, had a switch in medication (p-value: 0.4639). The exposed group had a survival of 74.1% [95% CI 64.0%-87.7%], with a mean time to change of 319±11 days. In the non-exposed group, survival was 70.0% [95% CI 60.0%-81.4%] and time 305±12 (p-value: 0.5). No significant differences were identified for any of the independent variables when analyzing crude or adjusted measures of strength of association, but the variables polymedication, history of non-adherence or pharmacological non-persistence behaved as potential risk factors. Conclusion: the incidence of switching between brand-name and generic imatinib was not significant and the factors associated with faster drug switching were polymedication, history of drug nonadherence, and non-persistence with pharmacy drug claims.

Machine learning techniques have always been a strong candidate for solving complex recognition problems. Drone/Bird detection and classification is one of the most challenging tasks in recent years. Both drones and birds come in different sizes, velocities, and behaviors. The lack of bird images and videos is tackled in this work. Deep learning, classical machine learning techniques such as Support Vector Machines (SVM) and Random Forest (RF) in addition to shallow neural network (NN) learning methods are used. Combined open-source data sets and labeled bird images data sets are used in training and testing for detection and classification. In particular, several deep learning methods are used in the detection of RGB and IR drone images. They were compared with the new SSD-AdderNet which showed the best results in the detection of IR images while exhibiting the least complexity. The SVM proved to be the best in classification.

The Skellam model describes discrete-time population dynamics of a single species assuming uniform (i.e., random or Poissonian) individual distribution and intraspecific contest competition. Apart from studies on individual-based models derived from first principles, it has rarely been applied to ecological research. However, in specific situations, it may be more appropriate than, for instance, the frequently used Ricker model. This is derived from assuming scramble competition among individuals. In this paper, we offer insight into the first principles underlying the Skellam model. In addition, we provide an alternative parameterization of the model in terms of two commonly used parameters: intrinsic rate of population increase and carrying capacity. In light of these findings, the Skellam model may be a useful alternative for a range of purposes where it has previously been overlooked, e.g., in fitting population models to time series data.

Stabilizing the cubic phase of Li7La3Zr2O12 (LLZO) through doping has been a challenging issue, as conventional aliovalent dopants often decrease Li ion mobility and induce unwanted phase transformations. In this study, a novel multi-component doping strategy is proposed that stabilizes the cubic phase of LLZO while maintaining high Li ion mobility. The practical isovalent ions and their combinations are screened using density-functional theory (DFT) calculations and ab-initio molecular dynamics (AIMD) simulations, identifying the most stable multi-component alloy configuration that can stabilize the robust cubic phase of LLZO. Our results demonstrate that the proposed Li7La3(Zr, Hf, Ce, Ru)2O12 composition has a stable cubic phase at low temperatures, which we validated through experimental synthesis. Our proposed doping strategy has the potential to advance the development of high-performance all-solid-state batteries.

Leaf herbivory potentially affects carbon (C) and nutrient cycling in forest ecosystems. It is especially critical to study the leaf herbivory rates in mangroves to understand the pattern of resource changes from the detrital pathway to the grazing pathway. However, determinants of leaf herbivory rates in mangroves are poorly understood. We examined the differences in leaf herbivory rates among leaf phenotypes (sun or shade leaves), leaf status (young or old leaves), and season (summer or winter) and investigated the relationships between the leaf herbivory rates and 12 leaf traits (including chemical, physiological, and physical/mechanical traits) in each of six communities from the seaward fringe to the inland of subtropical mangroves on Iriomote Island, southern Japan. The herbivory rate decreased as the concentration of condensed tannins or the tannins: nitrogen ratio increased but did not correlate with the other leaf traits, indicating that leaf herbivory rates are mainly driven by condensed tannins rather than by leaf nutrient concentrations or physical/mechanical traits. In the seaward and one rhizophoraceous species, the herbivory rates were higher in summer than in winter and differed among leaf phenotypes. However, no clear pattern was observed among leaf status across species. Our results suggest that the grazing pathway in mangrove forests is mainly regulated by the concentration of condensed tannins in leaves, often varying with the season and leaf phenotype. Understanding these mechanisms is critical for a comprehensive appreciation of the high productivity of and nutrient cycling in mangrove forest ecosystems.

The Dynamic Atmosphere Energy Transport (DAET) climate model, a mathematical model previously applied to a study of Earth’s climate, has been adapted to study the climatic features in the low-pressure, dust-prone atmosphere of the planet Mars. Using satellite data observed for Martian Year 29 (MY29), temperature profiles are presented here that confirm the studies of prior authors of the existence on Mars of a tropical solar-energy driven zone of daytime atmospheric warming, that both diurnally lifts the tropopause and follows the annual latitudinal cycle of the solar zenith. This tropical limb of ascending convection is dynamically linked to polar zones of descending air, the seasonal focus of which is concentrated over each respective hemisphere’s polar winter cap of continuous darkness. An analysis of the MY29 temperature data was performed to generate an annual average surface temperature metric that was then used to both inform the design of and to constrain the computation of the DAET climate model. The modelling analysis suggests that the Martian atmosphere is fully transparent to surface emitted thermal radiant energy. The role of lit hemisphere surface reflectance provides an energy boost to the dust-prone surface boundary layer at grazing-angle latitudes. This backlighting process of quenched solar energy capture ensures that the Martian climate operates as a black-body system. The high emissivity solar illuminated hemispheric surface heats the atmosphere by direct thermal conduction followed by a process of adiabatic convection across the planetary surface. It is the non-lossy process of adiabatic convection that results in the development and maintenance of a flux-enhanced atmospheric energy reservoir which accounts for the 2 Kelvin Atmospheric Thermal Effect in the Martian troposphere.

Double perovskites that are lead-free are becoming increasingly popular for use in a variety of applications such as solid-state lighting, thermoelectrics, and photovoltaics. In this study, the physical properties of inorganic double perovskites Rb2NaBiX6 (X= Cl, F, Br, I) were thoroughly examined using the density functional theory (DFT) based Wien2K code. Structural parameters were determined using the Murnaghan equation of state and Chapin’s method, which were found to be in good agreement with other current results. The research focused on investigating the mechanical, electronic, optical, and transport properties of Rb2NaBiF6, Rb2NaBiCl6, Rb2NaBiBr6, and Rb2NaBiI6 double perovskites for use in optoelectronics and photovoltaic devices. The calculated indirect band gap values using GGA and LDA approximation were found to be 4.932, 3.637, 2.972, and 2.002 eV for Rb2NaBiF/Cl/Br/I6, respectively. Optical properties were analyzed in terms of dielectric constants, absorption coefficient, refractive index, and reflectivity. The highest peak absorption was found to occur in the ultraviolet and visible ranges for all compounds, making them suitable for use in optoelectronic applications. The electron transport properties were studied by examining electrical conductivity, thermal conductivity, Seebeck coefficient, and figure of merit. The resulting ZT values obtained by the calculations in the temperature range of 100–1200K were found to be 0.82/0.81 for materials I6/Cl6 and 0.80/0.78 for materials F/Br. Furthermore, the analysis of transport properties suggested that the inorganic double perovskites Rb2NaBiX6 (X= Cl, F, Br, I) have p-type semiconducting characteristics.

The development of planar luminogens with isoelectronic B-N moiety and replacing the conventional C=C bonds is an unusual approach to tune the optical properties of organic materials in solution and condensed phase. Herein, three boron congeners and their analogous carbon congeners are developed via engineering the aliphatic / aromatic functionality unveiling the role of each functionality on intermolecular packing and luminogenic behavior. The boron-fused molecules exhibited slip-stack packing orientation governed by B-π interactions and showed aggregation induced emission in the condensed state unlike the carbon analogs which had a typical aggregation caused quenching (ACQ) phenomena. Notably, the offset dimeric arrangement in octyl chain substituted boron congener offers highly emissive nano-assemblies and solid-state luminescence which was utilized for fluorescence-based rapid detection of broadly used tetracycline and oxytetracycline antibiotics. This detection was further translated into a prototype technique using a smartphone-based platform for easy, onsite detection. Examining the structure-property relationship could lead to the development of highly emissive unusual luminogens by restricting the detrimental π-π stacking via insertion of BN moiety into cyclic hydrocarbon framework. This promising strategy provides access to potential planar luminogens while generating unusual photophysical properties for advanced applications.

What is atrial fibrillation? A RETRO-spective analysis Thomas Rostock, MD1, Alexander P. Benz, MD, MSc1,2 and Raphael Spittler, MD, MSc11 University Hospital Mainz, Center for Cardiology, Department of Cardiology II / Electrophysiology, Mainz, Germany2 Population Health Research Institute, McMaster University, Hamilton, Ontario, CanadaRunning title: RETRO mapping of AFWord count: 1435Corresponding author:Thomas Rostock, MDUniversity Hospital MainzCenter for CardiologyCardiology II / ElectrophysiologyLangenbeckstr. 155131 Mainz, GermanyEmail: throstock@gmail.comDisclosures: None declared.Funding: None.Keywords: Atrial fibrillation, mapping, mechanisms, wavefrontIdeally, before implementing any treatment as standard of care, pathophysiological mechanisms need to be identified in order to elaborate and define potential therapeutic targets. Philosophy of science described the fundamental role of categories for components of biological mechanisms: entities and activities. In this regard, activities between different entities are considered to establish a specifically organized biological phenomenon (1).More than six decades ago, pioneer research on mechanisms of atrial fibrillation (AF) by Moe and co-workers introduced the “multiple wavelet hypothesis” (2). It was not until the mid 1980s that a group of researchers led by Allessie performed high-density atrial mapping in the canine heart and demonstrated multiple wandering wavelets with a continuous beat-to-beat change in activation pattern (3). Based on this concept, the surgical MAZE procedure developed by Cox et al. aimed at creating anatomical barriers for multiple reentrant wavefronts by means of surgical incisions transecting the atria into separated areas was introduced (4). The identification of focal repetitive electrical discharges arising from the pulmonary veins by Haissaguerre and colleagues in the late 1990s ushered in a new era in the interventional treatment of AF (5). This new pathophysiological concept not only provided a fundamentally new target for the interventional treatment of AF, it also shifted the focus of research from the perpetuating substrate to initiating triggers. However, while patients with “short-lived” episodes of AF typically respond well to pulmonary vein isolation, efficacy of catheter ablation is limited in many patients with persistent AF. This led researchers to re-appraise mechanisms of the atrial arrhythmogenic substrate. Using computational mapping of AF models, several mathematical methods for signal processing (e.g., dominant frequency, Hilbert transformation, etc.), optical mapping, non-invasive panoramic mapping and rotational activity mapping were investigated in the pre-clinical and clinical setting for characterization of electrophysiological mechanisms during electrically established AF (6). Interestingly, there is one specific key feature collectively described: activation patterns of consecutive phases during AF demonstrate spatiotemporal organization with varying stability. Thus, accumulating data derived from contemporary AF mapping studies challenge the concept of a global randomly meandering atrial activation causing different phenotypes of AF.In this issue of the Journal , Smith and colleagues (9) report from a prospective, observational study on a novel, computationally acquired and algorithm-based AF mapping technology developed in conjunction with a proprietary software (MATLAB). This mapping tool has been previously introduced by the same group and is called RETRO-Mapping (7). RETRO-Mapping is a technological expansion of RIPPLE-Mapping, an algorithm that is independent of time-window settings, also developed by the group of Linton et al (8). The basic principle of RETRO-Mapping is an analysis of cross-referenced electrode activation derived from a multi-polar catheter in the surface-covered area during AF. The current study was designed as a proof-of-concept investigation aimed at the evaluation of patterns of AF activation. A 20-pole spiral double loop catheter (AF Focus II, St. Jude Medical) was placed at the posterior left atrium. After stabilization, local electrograms during AF >30 seconds were obtained. Anatomical positions of the catheters electrodes were visualized with the NavX Ensite X system and exported into the RETRO-Mapping software along with their corresponding electrophysiological data. The algorithm calculated three parameter of wavefront propagation: cycle length, conduction velocity, and wavefront direction. The midpoint between two adjacent electrodes of the loop catheter corresponds to the position of bipolar electrograms. Through a process called triangulation, midpoints were used to define corners for the segmentation of the left atrial posterior wall into triangles. The idea of triangulation of the covered area is to obtain the most appropriate position of two adjacent midpoints for further comparison of two local electrograms connected by the edge of a triangle. The geometric and activation properties of connected electrograms allowed for further analysis used for calculation of cycle length. A dichotomization of tissue excitability (depolarized myocardial tissue was coded as 1, and repolarized tissue was coded as 0) was used to create binary images. The Euclidean distance transform algorithm calculated the distance of pixels with a value of 0 to the nearest pixel with a value of 1. Incorporating distance information and the sampling frequency of the mapping algorithm as a marker of time, conduction velocity is calculated. Smith and colleagues used the Sobel operator for image processing to analyze wavefront direction. This mathematical filter calculates the gradient of image intensity at each point. These data are then used to detect areas where the intensity changes rapidly, which helps to identify edges of an image. The activation edge direction was derived from these edges and was used to calculate the overall wavefront direction. The researchers were interested in (1) whether an advancing wavefront maintained its direction and (2) whether the plane wavefront would be predictive of the subsequent wavefront direction.In eight patients with three types of AF (paroxysmal, persistent without amiodarone and persistent under amiodarone treatment), more than 34.000 activation edges of plane wavefronts (i.e., linear wavefront activations of the mapping field) were detected. With increasing intervals between new wavefront activations, the difference of wavefront directions also increased in a linear relationship. Smaller direction changes were observed in patients with persistent AF with amiodarone as compared to those with persistent AF without amiodarone. However, the greatest variability in activation changes was observed in paroxysmal AF. Activation direction consistency, indicated by small variations between wavefront directions, was highest in persistent AF with amiodarone and lowest in paroxysmal AF. More than half of all wavefront activation patterns predicted the pattern of the subsequent wavefront. In this context, the highest predictive value of activation patterns for subsequent wavefronts was found in persistent AF without amiodarone (the AF type with the shortest cycle length).With the presented study, Smith and colleagues shed some light on the complexities surrounding AF activation patterns. Gleaned from human high-density contact mapping of electrophysiological features during AF, data were processed with a dedicated software in order to transform AF activation patterns into a color-coded two-dimensional model. This novel software package may provide real-time calculation of conduction velocity and cycle length during a mapping/ablation procedure and could potentially be incorporated into existing 3-dimensional mapping systems. The authors are to be commended for providing a potential solution for processing electrophysiological activation data of AF with the potential to include this information into the ablation procedure. Furthermore, the data of this study reinforce the paradigm that AF perpetuation follows an organized and repetitive activation pattern (10).While the study has a clear scientific basis, there are some practical issues to be considered. First, the current technology is limited by the apparent inapplicability to fibrotic atrial tissue which may represent an anatomical substrate in patients with more advanced types of persistent AF. Second, the algorithm characterized paroxysmal AF by features indicating more “disorganized” patterns as compared to the persistent AF types. The reasons for this observation currently remain unclear since paroxysmal AF with focal triggering (and maintaining) sources predominantly located within the pulmonary veins (and not the atria) and longer AF cycle lengths appears to represent a more organized type of AF. Third, with the current type of visualization of activation patterns, focally activated wavefronts cannot be distinguished from rotor activity or even passively activated areas. Fourth, only a small area covered by the double-looped mapping catheter can be mapped at a given time. However, even with larger high-density contact mapping catheters (e.g., the basket catheter), it still remains impossible to simultaneously cover the entire surface of the left atrium. In this context, the data of the presented study also may help to overcome this limitation since they revealed that a preceding wavefront predicted the subsequent activation pattern, potentially indicating similar wavefront configurations in neighboring areas. Sixth, calculation models used in this study are evaluated with a limited number of electrodes. Thus, it needs to be determined if larger areas represented by considerably more electrodes (and data) can undergo computational analysis in the same way (and in real-time). Finally, further and much larger studies are needed to determine how best to incorporate information on AF mechanism and visualization of atrial activation during AF in the clinical setting. Thus, next steps of research may include characterization of appropriate targets for the interventional treatment.At the end of the day, the clinical electrophysiological community should welcome efforts aimed at improving our understanding of the underlying mechanisms of particularly non-pulmonary vein dependent AF. This seems critical in order to define a tailored approach to the individual patient. The alternative is a continued focus on “empirical” ablation without fully appreciating the underlying pathophysiology. For now, durable pulmonary vein isolation is the only pathophysiologically established treatment in AF ablation, but hopefully will not remain the only in the future.

Rapid population growth has exacerbated problems surrounding natural resource consumption, and environmental concerns have deteriorated in various parts of the world. Energy generation accounts for a significant share of overall greenhouse gas emissions in the United States. As a result, eliminating pollution from energy-generating is a viable and significant research topic in academia. It is essential to begin exploring alternatives to traditional electricity plant-based generation that use coal, oil, or natural gas as a source of raw materials. The development of alternative power sources is becoming a focal point of the electricity-generating business over the last few decades. In this review, Wind power, Solar panels, Biogas as well as fuel cells are examples of mature modern energy generation systems today. Among these, photovoltaic panels seem to be the most widely accepted and practical technology for usage in both residential as well as commercial buildings. The capability of photovoltaic panels in the US has already surpassed 14 GW in 2014. By 2030, the solar energy sector hopes to generate 10% of the nation’s maximum amount of electricity. Systems using photovoltaic panels have become a new method to produce electricity. An abundant, limitless, cheap, and clean energy source is solar radiation. Because they use solar energy, solar panels are regarded as a clean and environmentally friendly method to produce electricity. Even though photovoltaic panels produce essentially no pollution (or) greenhouse gas emissions during operation, they do have an influence on the environment during the manufacturing and end-of-life processes. While these impurities are treated improperly and without safeguards in the recovery portion of the manufacturing process and then discharged into the environment, they constitute serious pollution risks. Researchers in Europe and Japan frequently use the term “Eco-balance” instead of “LCA”, but the two terms have nearly identical meanings. Along with the LCA approach from 1993, this package also includes goal and scope definition, life-cycle inventories, life-cycle impact assessments, and life-cycle improvement analyses. ”LCA is the examination and evaluation of a product system’s inputs, outputs, as well as potential environmental implications for its life cycle. Limitations of Life Cycle Assessment as well as the importance of LCA study are also discussed in this review. A case study of the Lake Street Garage in Fort Collins, Colorado is also included in this research. According to the findings of the LCA study, a solar power system has some benefits in terms of lowering greenhouse gas emissions and gaseous toxic releases. On the other side, traditional power plants generate less toxic waste than solar panel systems. The Lake Street Parking Garage’s solar panel system on its roof will not be able to recoup its expenses throughout its 25-year lifespan, according to the LCC result.

Case report of Allgrove syndrome: from 3 A to 4 A syndrome, the endocrinologist experience Authors: Wiem Saafi, Hamza Elfekih, Ghada Sabbegh, Ghada Saad, Yosra Hasni, Molka chadly. Affiliation: Department of Endocrinology, Farhat Hached University Hospital, Sousse, Tunisia. Correspondence:wiem.saafi@gmail.comPhone number: (+216)99492550ORCID ID: 0009-0004-6098-0458Keywords: Allgrove syndrome; adrenal insufficiency; growth; puberty; hypertension

A novel transformerless three-phase unidirectional bridgeless flying capacitor (UBFC) rectifier for medium-voltage and high-voltage applications is presented by this paper. The rectifier consists of three single-phase rectifiers in wye connection, the DC outputs of the three single-phase rectifiers are connected in parallel to provide a high common DC-link bus which makes it convenient to connect with NPC or FC multilevel inverters. To avoid phase to phase current circulation, an additional inductor and diode are added to each single-phase rectifier. Compared with conventional bidirectional multilevel converters, only half IGBTs are employed with lower voltage stress, line-frequency transformers are no longer be required, which makes the proposed rectifier has a series of advantages such as reduced cost, simplified control complexity, increased reliability and improved overall efficiency. The basic operating principle of the proposed rectifier in continuous conduction mode is discussed, an improved carrier-based level-shifted PWM modulation method integrated with voltage balancing and the double closed-loop control strategy are proposed to achieve more voltage levels and keep the flying capacitors in balance. The feasibility of proposed rectifier is verified by the simulation as well as experimental results.

Mpox (MPX), a zoonotic infection reported as early as 1970, is a double-stranded DNA virus, Mpox virus (MPXV), belonging to the genus Orthopoxvirus. MPX, a virus closely related to smallpox, was once considered a geographically restricted infection because it was predominantly endemic in West and Central Africa, except for the Democratic Republic of the Congo (DRC). However, in May 2022, a rare case of MPX was diagnosed in the UK. As of February 25, 2023, 86,127 confirmed cases and 97 deaths have been reported globally. It spreads through close contact with an infected person, infected animal, or an object which an infected person has touched. Although most people infected with MPXV may present with mild symptoms and will recover fully within a few weeks, people can have serious diseases and complications and may need to be hospitalized with it. Although smallpox vaccines and antiviral drugs are also effective against MPX, there is still no specific vaccine or drug for MPXV infection. Therefore, we need to take the right attitude and measures to stop the MPXV outbreak. In this review, we summarize the characteristics, mechanisms, immunology, and transmission of MPXV, as well as current vaccines, diagnostics, and treatments used for MPX, and provide clues for controlling MPX outbreaks and preventing such diseases.

Introduction: The spread of the SARS-CoV-2 virus has caused severe problems for healthcare facilities and infrastructure worldwide. The development of rapid diagnostic tools, effective treatment protocols, and vaccines against the pathogen has accelerated. This work aims to elucidate the benefits of recombinant human monoclonal antibodies to slow the progression of SARS-CoV-2 variant B.1.617.2 infection (delta variant). Material and methods: This is a retrospective analysis with a 6-month follow-up involving all patients who received recombinant human monoclonal antibodies (MABs) casirivimab/ imdevimab at University Hospital Martin in November and December of 2021. Results: A total of 180 patients were enrolled in the cohort with a mean time to administration of symptoms were 6,01 +/-0,3 days in the group of vaccinated patients and 5,52+/-0,28 days in the group of non-vaccinated patients and a mean time to the resolution of symptoms were 4,37 +/-0,62 days in the group of vaccinated patients and 3,83 +/-0,3 days in the group with non-vaccinated patients. Of these patients, 13 developed bronchopneumonia (7,2%)—serious side effects after MAB administration were observed in 1 patient. Conclusion: Using recombinant human monoclonal antibodies casirivimab/ imdevimab to slow or to stop SARS-CoV-2 variant infection B.1.617.2 significantly affected the course of the disease. Quick diagnostics, identification of at-risk patients, and multidisciplinary collaboration are essential in COVID-19 management.

A document by Safa Ben Aoun. Click on the document to view its contents.

Objective: to explore the impact of attending a clinical placement on selecting a career in obstetrics and gynaecology Design: Mixed methods study Setting: Imperial College London Population: Fifth year medical students attending a clinical placement in obstetrics and gynaecology Methods: Between January 2021- January 2022, questionnaires were used and semi-structured focus groups conducted, which were audio recorded. Descriptive statistics were conducted and a framework analysis on transcribed focus groups. Main outcome measure: the impact of the clinical placement on career choices Results: Six main themes were identified from the analysis; three contributing to considering a career in obstetrics and gynaecology; pregnancy is not an illness, extraordinary experience of observing childbirth and variable specialty and three themes emerged contributing to not considering a career; lack of work-life balance, high stakes specialty and the emotional toll. Even at an undergraduate level, medical students exhibited concerns about the long term feasibility of achieving work life balance and avoiding professional burnout, which was partly attributed to the responsibility of looking after both the woman and baby. Conclusions: Obstetrics and gynaecology is a challenging high stakes specialty but is also highly rewarding. Students experiences of childbirth during a clinical placement appear to contribute to the consideration of a career in obstetrics and gynaecology. It is crucial to provide a supported and realistic introduction to the specialty, to recruit enthusiastic junior doctors who will be resilient to the pressures of obstetrics.

IgG4 related Inflammatory Pancreatic Head Pseudotumor Mirror Pancreatic Carcinoma: A Novel Case Series with a Review of the LiteratureFaheemullah Khan, MBBS, MD1, Jehanzeb Shahid, MBBS, FCPS2, Amna Saleem, MBBS3, Uzzam Ahmed Khawaja, MBBS4, Wasim Ahmed Memon, MBBS, FCPS5, Uffan Zafar, MBBS6, Tariq Abdul Hameed, MD, DABR7, Khabab Abbasher Hussien Mohamed Ahmed, MBBS8* 1,2,5,6Department of Radiology, Aga Khan University Hospital, Karachi, Pakistan.3,4Jinnah Medical and Dental College, Karachi, Pakistan.7Department of Radiology, Indiana University School of Medicine, Indiana, US.8Faculty of Medicine, University of Khartoum, Khartoum, SudanFaheemullah Khan : Email: islamianfellow@hotmail.com, ORCID:https://orcid.org/0000-0001-6369-743XJehanzeb Shahid: Email:jehanzeb.shahid@aku.eduAmna Saleem: Email: amna.saleem41@hotmail.comUzzam Ahmed Khawaja: Email: uzzamahmedkhawaja@gmail.comWasim Ahmed Memon:Email:wasim.memon@aku.eduTariq Abdul Hameed: Email: thameed@iupui.eduKhabab Abbasher Hussien Mohamed Ahmed: Email: khabab9722@gmaail.com, ORCID:https://orcid.org/0000-0003-4608-5321Article type : Case SeriesAbstract: 105Main text : 1907 (Main document)Tables : 0Figures : 5References : 27Pages : 10