In this paper we study the spectral properties of a family of discrete one-dimensional quasi-periodic Schrödinger operators (depending on a phase theta). In large disorder, under some suitable conditions on v and a diophantine rotation number, we prove using basically K.A.M theory that the spectrum of this operator is pure point for all θ∈[0 ,2 π) with exponential decaying eigenfunctions.

Early digital experience (e.g., screen time and digital use) is believed to impact children’s brain development, functionally and structurally, but this impact has not been systematically reviewed. In this scoping review, we synthesized and evaluated 33 collected studies on children’s digital use (ages 0-12) and their associated brain development published between January 2000 and April 2023. The synthesis of the evidence revealed that: (1) digital experience does have positive and negative impacts on children’s brains, structurally and functionally; (2) it could cause structural and functional changes in children’s frontal, parietal, temporal, and occipital lobes, brain connectivity, and brain networks; and the most vulnerable area is the prefrontal cortex and its associated executive function; (3) early digital experience has both positive and negative impacts on children’s brain structure longitudinally. The limitations and implications for future studies are also discussed.

Background: Extrapleural pneumonectomy (EPP) is a complex surgical procedure involving en-bloc resection of the parietal and visceral pleura, lung, pericardium, and ipsilateral diaphragm. Small case series of pleural-based sarcoma of predominantly paediatric patients suggest EPP may be a life-prolonging surgical option. We aimed to describe the characteristics and outcomes of adults who underwent EPP at a specialized sarcoma center. Methods: Clinicopathologic variables, surgical details and follow-up information were extracted for eight patients undergoing EPP for pleural-based sarcoma between 2017-2020. Primary outcomes were event-free survival (EFS) and overall survival (OS) from the date of EPP. Secondary outcomes were disease-free interval (DFI) prior to EPP, and early and late postoperative complications. Results: At median follow-up of 22.5 months, median EFS was 6.0 months and OS was 20.7 months. Six patients had disease recurrence; five patients died of progressive disease. Two patients had not recurred: one died of a radiation-related esophageal rupture, and one was alive with no evidence of disease at 37.0 months. Characteristics of those with the longest EFS included low-grade histology and achieving a metabolic response to preoperative chemotherapy. Early postoperative complications included one ventilator-associated pneumonia with new-onset atrial fibrillation and two cases of hydropneumothorax. Late surgical complications included a case of infective endocarditis and septic shock. Conclusions: In adult sarcoma patients, EPP is rarely curative but appears to be a feasible salvage procedure when performed at specialized centers. Patient selection is critical, with a strong consideration for multimodal treatment to optimize oncological outcomes.

In this work, we report the first demonstration of an ultraviolet light-emitting diode (LED) with boron-containing multiple quantum wells. Electroluminescence emission from the BAlGaN LED was observed at 350 nm, with higher intensity compared to the AlGaN reference LED. A higher operating voltage compared to the reference LED was also observed which may be attributable to a nanomasking behaviour of boron in (Al)GaN alloys.

Topic: “Complex Management of Bartter Syndrome in a 2-Month-Old Preterm Infant: A Multidisciplinary Approach for Optimal Outcomes” Zainab Zaib Khan1, Ahmed Sajid*2, Aoun Zaib Khan3, Farva Zaib Khan4, Anika Naeem5, Sarah Sabir6,1Medical Student, CMH Lahore Medical College, Lahore, Pakistan2House Officer, Pakistan Institute of Medical Sciences, Islamabad, Pakistan3Resident Pediatrics, Metro Health System, Cleveland, Ohio Medical Student,4Al Nafees Medical College, Islamabad, Pakistan5Fellow Emergency Medicine, University of Mississipi Hospital, Mississippi, USA6Pediatric Resident, Monmouth Medical Center RWJBH, New Jersey, USA

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We constructed the electromagnetic wave equation in the Dirac algebraic system C l ( 1 , 3 ) . Then, the interpretation of Maxwell’s equations in terms of the spectral basis defined for the algebra along with the octonion formalism using its Fano plane concept is addressed thoroughly

ABSTRACTIntroduction. Spirometric reference equations (REs) assists diagnosing, monitoring and prognosticating respiratory diseases. However, spirometers are scarce in respiratory care in low-resource settings, hampering optimal care. Cheaper, simpler-to-use electronic peak-flow-meters (ePFM ) which measure both peak expiratory flow (PEF) and forced expiratory volume in one-second (FEV1) may serve alternative utility. However, their use requires REsfitted to local populations. We compare ePFM-measured PEF and FEV1 of Nigerian children with published local/foreign REs, including the Global-Lung-Function-Initiative (GLI) equations.Methods. PEF and FEV1 of healthy pupils aged 6-11 years in Lagos-Nigeria was cross-sectionally measured with ePFM (Asma-1™, Vitalograph, UK). PEF was compared to published local and foreign equations using Bland-and-Altman analysis. Goodness-of-fit of FEV1 to GLI-equations was defined as mean (SD) predicted z-scores < 0.5 (1.0), 5% z-scores < -1.64 (% lower-limit-of-normal, LLN), 5% > 1.64 (% upper-limit-of-normal, ULN).Results. 766 children [mean (SD) age: 8.9 (1.6) years; 53.1% girls] achieved mean (SD) PEF and FEV1 of 235.8 (52.0) L/min and 1.40 (0.34) L; higher in boys (p < 0.001), and strongly correlated with height (r=0.73-0.86), lower-limb-length (r=0.67-081), weight (r=0.62-0.76), age (r=0.60-0.66), upper-segment-volume (r=0.58-0.69), upper-segment-length (r = 0.54-0.61) and chest-circumference (r=0.52-0.66). PEF agreed poorly with local and foreign equations, with wide limits-of-agreement.GLI-African-American equations fitted our FEV1[mean (SD; %LLN, %ULN)- girls: -0.17 (1.10; 9.1%, 5.4%), boys: 0.03 (1.11; 7.2%, 7.5%)]; GLI-global and GLI-othersdid not fit.Conclusion: Our FEV1 fitted GLI-AA, albeit less so for girls. The most appropriate GLI FEV1 equations for our population require bench-marking with clinical outcomes.

Abstract Background and purpose: Several studies have indicated that reactive oxygen species (ROS) can lead to detrusor overactivity (DO), but the underlying mechanisms are not known. Hydrogen dioxide (H2O2) is used commonly to investigate the effects of ROS. In present study, we aimed to investigate the effects of H2O2 on phasic spontaneous bladder contractions (SBCs) of isolated human-bladder strips (iHBSs) and the underlying mechanisms. Experimental approach: Samples of bladder tissue were obtained from 26 patients undergoing cystectomy owing to bladder cancer. SBCs of iHBSs were recorded in organ-bath experiments. Immunofluorescence staining was conducted to confirm the TRPA1 expression on sensory nerves. Key results: H2O2 (1μM–10mM) concentration-dependently increased the SBCs of iHBSs. These enhancing effects could be mimicked by an agonist of transient receptor potential (TRP)A1 channels (allyl isothiocyanate) and blocked with an antagonist of TRPA1 channels (HC030031; 10μM). H2O2 induced enhancing effects also could be attenuated by desensitizing sensory afferents with capsaicin (10μM), blocking nerve firing with TTX (1μM), blocking neurokinin effects with NK2 receptor antagonist (SR48968, 10μM), and blocking PGE2 synthesis with indomethacin (10μM), respectively. Conclusions and implications: Our study: (i) suggests activation of TRPA1 channels on bladder sensory afferents, and then release of substance P or PGE2 from sensory nerve terminals, contribute to the H2O2-induced enhancing effects on SCs of iHBSs; (ii) provides insights for the mechanisms underlying ROS leading to DO; (iii) indicates that targeting TRPA1 channels might be the promising strategy against overactive bladder in conditions associated with excessive production of ROS.

A document by Vivek Sanker. Click on the document to view its contents.

The clinical utility of transesophageal echocardiography (TEE) in the perioperative period has increased remarkably in the past decade. TEE made the life of perioperative physicians easier by playing a key role in the decision-making process, helping in clinical and surgical management, and improving patient outcomes.[1](#ref-0001) Although there are published guidelines[2](#ref-0002) on the process of cleaning and disinfection of the TEE probes, we intend to highlight the importance of educating the personnel involved in taking care of the equipment to prevent damage to the TEE probes

paper identifies a list of diseases that may benefit from the treatments discussed. It concludes by suggesting studies involving patients with heart failure.

A document by Roshan Bhandari. Click on the document to view its contents.

A RARE CASE OF PRIMARY VAGINAL MALIGNANT MELANOMA-CASE REPORTShreya Singh Beniwal1, Rahul Chikatimalla2, Srikanth Dogiparthi3, Yukti Tomar4, Kiranmai Kanaparthi5, Vikaskumar Jitendrakumar Patel6, Roshan Bhandari71Lady Hardinge Medical College, Connaught Place, New Delhi-110001, India2Kamineni Institute of Medical Sciences, Narketpally, Telangana, India3St.Martinus University Faculty of Medicine, 122-124 Sta.Rosaweg, Willemstad, Curaçao4School of Medical Science and Research, Greater Noida, Uttar Pradesh, India5Malla Reddy Medical College for Women, Suraram, Hyderabad, Telangana, India6GMERS Medical College, Dharpur, Patan, Gujarat, India7Maharajgunj Medical Campus, Institute of Medicine, Tribhuvan University, Kathmandu-44600, Nepal

The escalating menace of ransomware attacks has emerged as a formidable challenge within the realm of cybersecurity. This research paper meticulously delves into the intricate evolution of ransomware threats, underscored by their escalating frequency and severity. Recent instances of companies falling victim to these pernicious attacks are spotlighted, offering a sobering view of the potential consequences. With a keen focus on deciphering the strategies and countermeasures employed to effectively navigate and neutralize these threats, this paper assumes a pivotal role in shedding light on the imperative need for proactive measures. By scrutinizing the tactics harnessed by cybercriminals and the resolute efforts mustered by organizations in their quest to mitigate risks, this research endeavors to unravel the dynamic landscape of ransomware threats. The synthesis of empirical case studies, meticulous statistical analysis, and expert insights creates a multifaceted perspective, enriching the discourse on ransomware's evolving nature. Consequently, the paper accentuates the pressing importance of fostering collaborative and comprehensive cybersecurity protocols, laying the foundation for fortifying the digital domain against the relentless tide of ransomware incursions.

Between 1925 – 1929, approximately 12 non-native mountain goats (Oreamnos americanus) were translocated from Alaska and British Columbia to the foothills of the Olympic Range, USA. By 1970, descendants of these goats had colonized the entire Olympic Range and concerns about the management of this introduced species developed as damage to alpine soil and vegetation occurred. A series of removals reduced the population from 1,175 in 1983 to 389 goats by 1990, followed by a period a stasis and growth indicated again in 2011 and 2016. We used empirical demographic and genetic data to parameterize a population genetics individual-based simulation model of the Olympic Range mountain goat population. We calibrated the model to simulate the population trajectory for Olympic mountain goats from establishment in 1925 through the 1983 census, and validated model dynamics by simulating the period from 1990 to 2016. Modeled population dispersal closely tracked anecdotal reports. However, observed heterozygosity did not align with published research, suggesting a process not accounted for within the simulation model, such as a bottleneck, founder effect, or population trajectory dynamics. Sensitivity analyses showed that changes in annual reproductive rate had the greatest influence on population trajectories, followed by juvenile mortality and adult female mortality, respectively. The modeled population showed that approximately 80% of the total animals removed during the 1980’s needed to be female in order for the observed population stasis to occur. This model has the potential to be used more widely with established or introduced mountain goat populations in other regions.

Background: The Omicron outbreak is characterized by breakthrough infection and reinfection. If no strategic solution can be found, vaccination-rate-based risk compensation may prolong the COVID-19 crisis. Infection control in university students may have an indirect impact on the COVID-19 burden for other age groups Methods: To reveal the association between related factors and a symptomatic episode of COVID-19, a school-wide web-based questionnaire survey was conducted among university students as a part of the annual health check-up in April, 2023. The positive outcome was confined to the first symptomatic onset during the Omicron variant outbreak. Results: In this self-administered and non-observational survey, risk or protective associations were merely estimated statistically in university students (n = 5,406). In measured factors, karaoke and club/group activities could maintain the statistical significance in adjusted odds ratios (ORs) as (relative) risk factors, and science course, measles/rubella (MR) vaccination, and COVID-19 vaccination remained as (relative) protective factors in adjusted OR analyses. Club/group activities (with member gathering) and karaoke sing-along sessions in university students may frequently have WHO’s three Cs. These risk factors are still important topics for the infection control of COVID-19 in university students. Together with some recent reports from other researchers, the significant protective role of MR vaccine in our survey warrants further clinical investigation. Conclusions: If the breakthrough infection continuously constitutes the majority of infection, real data in test-negative case-control or web-based questionnaire design continue to be important for statistical analysis to determine the minimal requirement of our strategies which may replace COVID-19 vaccines.

Cardiovascular diseases (CVDs) remain a major global health burden, and emerging evidence suggests that the gut microbiome plays a pivotal role in their pathogenesis and progression. This review paper aims to comprehensively analyze the intricate interplay between the gut microbiome and cardiovascular health. An extensive examination of existing literature explores how gut microbial composition and function influence CVD risk factors, such as inflammation, lipid metabolism, and blood pressure regulation. Additionally, we delve into the impact of dietary patterns, medications, and lifestyle factors on shaping the gut microbiota and how these changes can either exacerbate or ameliorate cardiovascular outcomes. Furthermore, we discuss the potential of gut microbiome-targeted interventions as promising avenues for preventing and managing CVDs. By consolidating the current state of knowledge, this review aims to shed light on the intricate link between the gut microbiome and cardiovascular diseases and highlights the potential for novel therapeutic strategies to combat this significant public health challenge.

This paper proposes a hierarchical distributed voltage control (HDVC) scheme for active distribution networks (ADNs) with high penetration of photovoltaics based on distributed model predictive control (DMPC) and alternating direction method of multipliers (ADMM). The reactive power outputs of several photovoltaic clusters (PVCs) and photovoltaic (PV) units within each PVC are optimally coordinated to keep PV terminal voltages and the voltages of all critical buses of ADNs within the feasible range and mitigate voltage fluctuations. In the ADN layer, a distributed reactive power control scheme based on DMPC is designed for the PVC, which regulates the voltages of all critical buses to be closed to the rated value and mitigates the reactive power variations. In the PVC layer, the reactive power outputs of PV units are optimized based on ADMM to minimize the voltage deviation of each PV terminal and track the reactive power reference from the PVC control. The proposed HDVC scheme requires communication only between neighboring PVC controller, while each PV controller only communicates with the corresponding PVC controller. This regulates the voltages in a completely decentralized manner and effectively reduces the computation burden of the PVC and PV controllers. A modified Finnish distribution network with 10 PVCs was used to validate the control performance of the proposed HDVC scheme.

Lung adenocarcinoma (LUAD) is a complex disease with unclear molecular characteristics. In this study, a comprehensive computer analysis of genomic data was used to investigate the molecular characteristics of LUAD subtypes based on angiogenic genes. Non-negative matrix factorization (NMF) clustering was performed using 1297 genes related to angiogenesis. Two subtypes of LUAD (C1 and C2) were found with different survival times based on in-depth computer data analysis. The novel classification shows that the proportion of immune cells and CD247 expression was higher in the C1 subtype than in the C2. The activation scores of TGF-Beta, TP53, WNT, and angiogenesis pathways in the C1 group were higher than those in the C2 group. The ESTIMATE immune scores and multiple related pathways enrichment score based on GO and KEGG computer enrichment analysis of C1 was higher than the C2 subgroup. The two subtypes with significantly different mutation ratios of multiple critical genes were significantly related to the sensitivity of clinical chemotherapy drugs such as JNK.Inhibitor.VIII, Docetaxel, GW843682X, which indicated a greater sensitivity to immunotherapy in the C1 subtype. Besides, the expression of 10 key angiogenic genes and nine hypoxia-associated genes was significantly correlated with survival, according to longitudinal follow-up computer analysis. Our angiogenic clustering leads to the development of a new method of LUAD genotyping with stabilized and predictive features, which allows a better understanding of LUAD heterogeneity and may facilitate novel clinical antiangiogenic therapy strategies.

Surface-enhanced Raman scattering (SERS) has become an essential bio-detection technique. Due to its high sensitivity, good signal specificity, and resistance to photobleaching, SERS has been widely used in biomedical research fields such as molecular imaging, tumor diagnosis, and drug monitoring. This review focuses on the progress of SERS in biomedical applications. We first introduce the basic principle of SERS and the progress of substrate research. Then we summarize the latest research progress of SERS in drug monitoring, cell and exosome detection, tumor imaging, and detection platforms combining microfluidic and lateral flow technologies. Subsequently, the applied research of SERS in early diagnosis of pancreatic cancer and drug efficacy monitoring is described. Finally, the future development direction and possible challenges of SERS in tumor diagnosis and treatment are proposed.

Yueqian Cao1, and Ana P. Barros21. Department of Civil and Environmental Engineering, Duke University, Durham, NC, USA2. Department of Civil and Environmental Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, USA* Correspondence: barros@illinois.eduAbstract: A radar observing system simulator consisting of a coupled snow hydrology (MSHM) and radiative transfer model (MEMLS) was modified to include vegetation contributions to the total backscatter from the ground-snow-vegetation system. Vegetation parameters were estimated from airborne SnowSAR (X- and Ku-band) and Sentinel-1 (C-band) measurements in Grand Mesa (flat topography) and Senator Beck Basin (steep topography) by solving the inverse problem via simulated annealing. Physics-based constraints were imposed to address indeterminacy with good results, which highlights that the forward-inversion system accounting for complex multiple scattering within the ground-snow-vegetation system reliably regulated compensation effects of vegetation and snow-ground interface, including simulating observed background backscatter under snow-free conditions. The proximal goal of this study is to quantify the integrated effect of complex multiple scattering within the ground-snow-vegetation system toward isolating volume scattering from subcanopy snowpack, and subsequent retrieval of snowpack properties such as snow water equivalent (SWE). The stretch goal is to develop a vegetation correction to expand the operational utility of radar remote sensing of snow in the boreal forests at northern latitudes. The proposed approach has high operational utility for retrieving large-scale SWE from satellite-based SAR measurements.Keywords: forward-inversion system; MEMLS; simulated annealing; SAR; vegetation heterogeneity

Atherosclerosis is the leading cause of numerous cardiovascular diseases with a high mortality rate. Non-coding RNAs (ncRNAs), RNA molecules that do not encode proteins in human genome transcripts, are known to play crucial roles in various physiological and pathological processes. Recently, researches on the regulation of atherosclerosis by ncRNAs, mainly including microRNAs, long non-coding RNAs, and circular RNAs, have gradually become a hot topic. Traditional Chinese medicine has been proved to be effective in treating cardiovascular diseases in China for a long time, and its active monomers have been found to target a variety of atherosclerosis-related ncRNAs. These active monomers of traditional Chinese medicine hold great potential as drugs for the treatment of atherosclerosis. Here, we summarized current advancement of the molecular pathways by which ncRNAs regulates atherosclerosis and mainly highlighted the mechanisms of traditional Chinese medicine monomers in regulating atherosclerosis through targeting ncRNAs.

The quasi-Z-source H-bridge grid-connected inverter (QHGCI) is well known with its advantages of the void of shoot-through problem and the high DC-voltage utilization. But the existence of the common-mode leakage current in the power frequency cycle, lower power density and higher thermal stress makes it hardly applicable to the grid-penetrating application. Thus with a purpose to conquer the problem relating to the QHGCI, an innovative transformerless Z-Source photovoltaic grid-connected inverter with coupled inductor coil (TZPGCI-CIC) is proposed. The circuitry topology and an unipolar SPWM strategy are firstly introduced in short. And thereafter the common-mode voltage in the whole working process is derived and evaluated through the detailed operating mode analysis, in which a constant value of it has been theoretically revealed. Lastly, a prototype platform of TZPGCI-CIC is setup and its good performance on leakage current suppression, lower thermal stress are validated with the experimental results.