Quintessential Quartic Quasi-topological Quartet

We construct the quartic version of generalized quasi-topological gravity, which was recently constructed to cubic order in arXiv: 1703.01631. This class of theories includes Lovelock gravity and a known form of quartic quasi-topological gravity as special cases and possess a number of remarkable properties: (i) In vacuum, or in the presence of suitable matter, there is a single independent field equation which is a total derivative. (ii) At the linearized level, the equations of motion on a maximally symmetric background are second order, coinciding with the linearized Einstein equations up to a redefinition of Newton's constant. Therefore, these theories propagate only the massless, transverse graviton on a maximally symmetric background. (iii) While the Lovelock and quasi-topological terms are trivial in four dimensions, there exist four new generalized quasi-topological terms (the quartet) that are nontrivial, leading to interesting higher curvature theories in $d \geq 4$ dimensions that appear well suited for holographic study. We construct four dimensional black hole solutions to the theory and study their properties. A study of black brane solutions in arbitrary dimensions reveals that these solutions are modified from the `universal' properties these solutions have. This result may lead to interesting consequences for the dual CFTs.Comment: 46 pages, 1 figure. Discussion of black branes added to section

Right thoracotomy approach for open heart surgery

Background: Median sternotomy approach provides excellent exposure of all the chambers of heart for performing open heart surgery, but this approach is the most invasive used for any surgical procedure. Besides an ugly scar, median sternotomy not only increases the morbidity but at times mortality also. To have an acceptable postoperative scar and to avoid the morbidity and mortality associated with median sternotomy, the present study was conducted to find an alternative to median sternotomy in patients with atrial septal defect, mitral and tricuspid valve disease.Methods: Patients were positioned with right side elevated 30-45 degree, and heart was approached by right anterior thoracotomy, through 4th intercostals space. Pericardium was opened anterior to phrenic nerve, and upper end pericardial stay sutures given to get aorta more anterior. Aortic and bicaval cannulation was done and intracardiac procedures were performed as are done after standard median sternotomy.Results: Difficult aortic cannulation and fracture to costochondral junction was the problem observed in some patients. Repair of atrial septal defect was the most common operation performed. Sternotomy, rib resection and peripheral cannulation was not needed in any of these patients. Post-operative period was uneventful in majority.Conclusions: In all patients above 4 years of age, with normal aortic valve, without active lung disease / previous right thoracotomy, having isolated atrial septal defects, mitral and tricuspid valve disease the heart should be approached through right anterior thoracotomy.

Characterizations and estimations of Size Biased Generalized Rayleigh Distribution

Since the widely using of the weighted distribution in many fields of real life such various areas including medicine, ecology, reliability, and so on , then we try to shed light and record our contribution in this field thru the research. In this paper, a new class of size-biased Generalized Rayleigh distribution is defined. A size-biased Generalized Rayleigh distribution, a particular case of weighted Generalized Rayleigh distribution, taking the weights as the variate values has been defined. The power and logarithmic moments of this family is defined. Some important theorems of SBGRD has been derived and studied. A new moment estimation method of parameters of SBGRD using its characterization is presented. In brief, this paper consists of presentation of general review of important properties of the new distribution. Bayes estimators of Size biased Generalized Rayleigh distribution (SBGRD), that stems from an extension of Jeffery’s prior (Al-Kutubi [13]) with a new loss function (Al-Bayyati [12]). We are proposing four different types of estimator. Under squared error loss function, there are two estimators formed by using Jaffrey prior and an extension of Jaffrey’s prior. The two remaining estimators are derived using the same Jeffrey’s prior and extension of Jeffrey’s prior under a new loss function. These methods are compared by using mean square error through simulation study with varying sample sizes. Keywords: Generalized Rayleigh distribution, Size biased generalized Rayleigh distribution, Logarithmic moment, squared error loss function, Al-Bayatti’s loss function

Interval Load Forecasting for Individual Households in the Presence of Electric Vehicle Charging

The transition to Electric Vehicles (EV) in place of traditional internal combustion engines is increasing societal demand for electricity. The ability to integrate the additional demand from EV charging into forecasting electricity demand is critical for maintaining the reliability of electricity generation and distribution. Load forecasting studies typically exclude households with home EV charging, focusing on offices, schools, and public charging stations. Moreover, they provide point forecasts which do not offer information about prediction uncertainty. Consequently, this paper proposes the Long Short-Term Memory Bayesian Neural Networks (LSTM-BNNs) for household load forecasting in presence of EV charging. The approach takes advantage of the LSTM model to capture the time dependencies and uses the dropout layer with Bayesian inference to generate prediction intervals. Results show that the proposed LSTM-BNNs achieve accuracy similar to point forecasts with the advantage of prediction intervals. Moreover, the impact of lockdowns related to the COVID-19 pandemic on the load forecasting model is examined, and the analysis shows that there is no major change in the model performance as, for the considered households, the randomness of the EV charging outweighs the change due to pandemic

Use of the Ilizarov apparatus to improve alignment in proximal humeral fractures treated initially by a unilateral external fixator

One of the recommended methods for the management of displaced unstable proximal humeral fractures is the unilateral external fixator. In polytrauma cases this method may be especially useful for the stabilisation of these fractures. However, problems may arise if the fracture is fixed in a malaligned or distracted position. Conversion of the treatment concept to other modalities is difficult because of the problem of pin tract infection. The Ilizarov apparatus provides an useful method in such situations, as it allows distraction, translation and compression without the need for further anaesthesia and additional fixation

Helminth infection in coldwater fishes of Suru river Ladakh, Jammu and Kashmir, India

A helminthological survey of coldwater fishes of Ladakh was carried out from November 2007 to April 2009 (18 months). A total of 93 fishes belonging to two species viz., Schizothorax plagiostomus and Diptychus maculatus were collected and examined from different collection sites of Suru river, Kargil. A total of 2 helminth species viz., Neoechinorhynchus yalei Datta, 1936 and Rhabdochona himalayai Fotedar & Dhar, 1977 belonging to two helminth groups, i-e. Acanthocephala and Nematode were reported. It was found that out of 93 hosts examined, 31 were found infected with 43 parasites recovered in total, with an overall prevalence, mean intensity and abundance of 33.33%, 1.38 and 0.46 respectively. Distribution of helminth infection and its relation with sex and size of host was analysed. The helminth infection showed no significant relationship with sex of hosts however it showed mostly significant relation to size of host

Customized vacuum assisted closure therapy of wounds as a simple and cost-effective technique of wound closure-a prospective observational study from underdeveloped world

Background: Aim of the study was to study the efficacy and cost-effectiveness of indigenously designed customized vacuum assisted closure (VAC) of wounds in our patients. The management of difficult to heal wounds has been the main force that led to the development of advanced gadgets for their management. The technique of vacuum assisted closure has revolutionized the management of difficult to heal wounds and delivers better results as compared to conventional technique. Our aim was to assess the efficacy and cost effectiveness of customized VAC therapy.Methods: This prospective study was conducted in the department of surgery and allied specialties, GMC Srinagar, from June 2018 and September 2020. During this period, 80 patients were subjected to VAC therapy and were included in this study.Results: VAC dressing was used in 80 patients. 55 were males and 25 were females. Most of the wounds in our study were located over lower limbs (70%). RTA was the most common mode of injury followed by fall from height. After the VAC therapy, 78.8% patients were managed by STSG, 11.3% by flap cover, 6.3% by secondary suturing and 3.8% healed by secondary intention. Pain was experienced by 30% of the patients, 7.5% had hypoalbuminemia, 3.8% had surrounding skin maceration. The average total cost of the VAC therapy was 863.13 (±399.82) Indian rupees (11.76 USD). The mean duration of hospital stay for our patients was 22 days.Conclusions: Customized VAC Therapy has revolutionary potential in the management of the difficult to treat wounds as far as its safety, speed and cost effectiveness is considered especially in a setup of poor income nations like ours