Estimation of gas induction in jet loop reactors: Influence of nozzle designs

Jet loop reactors are used widely for conducting gas liquid reactions because of the high mass transfer achieved in the gas-liquid ejector. Studies have shown that the mass transfer has a very strong correlation to the amount of gas induced in the ejector, and hence it is important to understand gas induction to enhance the performance of any gas-liquid nozzle. In this work, we used a single phase CFD model of the ejector with one adjustable parameter for estimating gas induction rates. After establishing that the model adequately describes the experimental data, the model was used for a quick evaluation of ejector geometries. Influence of key geometric parameters of gas-liquid ejectors like nozzle diameter, mixing tube length, distance between the nozzle outlet and mixing tube, suction chamber geometry and diffuser angle was investigated. It was found that dependence of gas induction on geometric parameters like distance between nozzle - mixing tube, suction chamber geometry, diffuser angle was either weak or had a clear maxima at or beyond a certain value of the geometric parameter. Other parameters like mixing tube length and nozzle diameter have a more complex impact on gas induction. The presented approach and results will be useful for quantifying influence of nozzle designs on gas induction rate in jet loop reactors

Ash removal from low rank coal

The work presented here is concerned with cleaning of low rank coals such as Texas lignite. As a result, Jewett Texas lignite was cleaned from 28% ash by weight to 8.5%. In the first part of the thesis, it is proved that conventional cleaning techniques used for bituminous and sub-bituminous having pyritic impurities does not work for cleaning lignite coal because of different coal chemistry and the presence of clay impurities. Hence after trying conventional processes, there was a need for a new technique capable of removing clay from low rank coals.;Micronized coal, obtained from DevourX LLC, proved to be more easily separated than run of mine coal, using a slurry-based technique with an agglomerant to isolate carbon rich particles and a lignin based surfactant. The coal was cleaned from 28% ash to 9.5 % ash.;This project was sponsored by the Defense Advanced Research Project Agency (DARPA), under subcontract from the University of Texas at Arlington

AI-Driven Demand Forecasting for Capacity Planning in Multi-Tenant Systems

Capacity planning in multi-tenant systems is a critical challenge due to dynamic workloads, resource contention, and the need for tenant isolation. Traditional forecasting methods, such as ARIMA and exponential smoothing, struggle to adapt to the heterogeneity and volatility of multi-tenant environments. This paper proposes a scalable AI-driven framework for demand forecasting and capacity planning, leveraging hybrid architectures like LSTM-Transformer ensembles and transfer learning. We validate our approach using a cloud-based Kubernetes testbed, synthetic datasets, and anonymized real-world workload traces. Experimental results demonstrate a 34% improvement in forecasting accuracy (RMSE) over statistical baselines and a 40% reduction in over-provisioning costs. The framework achieves sub-second latency for real-time decision-making while scaling to 1,000+ tenants

Development of low-carbon recycled aggregate concrete using carbonation treatment and alccofine

Since the construction industry is one of the major sectors responsible for the overexploitation of natural resources and the production of greenhouse gases, there is an urgent need to adopt a sustainable and environmental friendly approach to mitigate climate degradation. Research has explored the potential of recycled aggregate (RA) as a viable alternative to natural aggregate in concrete production. Currently, several treatment methods are being employed to enhance the efficient incorporation of RA into concrete, aiming to address this issue. However, the effective utilization of RA in place of NA remains uncommon. In this study, an effort has been made to develop a low-carbon recycled aggregate concrete by utilizing 100% carbonation treated recycled coarse concrete aggregate (CRCCA) in place of natural coarse aggregate (NCA) and alccofine as mineral admixture. A comprehensive analysis was performed, comparing the properties of CRCCA to those of untreated recycled coarse concrete aggregate. This analysis covered changes in weight, bulk density, water absorption, crushing value, and microstructure. Furthermore, five different concrete mixes were prepared, each varying in the proportion of natural coarse aggregate (NCA), untreated RCCA, and CRCCA. These mixes also incorporated alccofine as a mineral admixture. The evaluation process involved assessing the effectiveness of carbonation treatment and alccofine addition through tests on the workability, water absorption, density, and compressive strength of the concrete mixes. The study demonstrated that carbonation treatment of RCCA resulted in substantial improvements in crushing value and water absorption of CRCCA, alongside enhanced workability, reduced water absorption, and increased density in CRCCA concrete. Moreover, CRCCA concrete exhibited notable compressive strength gains at both 28 and 90 days compared to untreated RCCA concrete. Furthermore, the use of CRCCA and alccofine contributed to reducing GHG emissions associated with cement production, emphasizing the environmentally friendly attributes of this low-carbon concrete formulation

Clinical outcomes in management of dislocation of carpometacarpal joints of hand: a rare orthopaedic presentation

Background: Dislocation of carpo-metacarpal (CMC) joints especially involving the 2nd and 3rd or paired dislocations, presents a rare pattern of orthopaedics hand injuries. They are associated with high energy trauma usually involving motorbike accidents. Severe soft tissue inflammation over the affected hand and associated injuries often makes detection of these fractures difficult. They require prompt management at presentation. Failure to be diagnosed and treated at early stage leads to joint stiffness, restrictions of wrist movement, deformity and sometimes ruptures of tendons crossing the wrist. Most of them require open reduction and internal fixation for stabilization. The objective of the study was to clinically evaluate outcomes in management of carpometacarpal joint dislocations.Methods: We prospectively studied 6 cases of CMC dislocation presenting at average of 1week from the original injury. All were clinically and radiologically evaluated. 3 cases were managed with open reduction and internal fixation with K wire and 1with closed manipulation and percutaneous k wire fixation and 1 case by arthrodesis of CMC joint. Functional assessment was done with Quick DASH score at 6 weeks, 3 months, 6 months and 1 year.Results: All the patients went on to have good functional recovery. The average quick DASH score showed improvement from 77.39 to 4.07 over 1 year follow-up. Conclusions: Careful and meticulous examinations of hands are necessary in high velocity trauma cases to avoid missing diagnosis of CMC dislocation. ORIF remains the gold standard treatment which can also be used for cases presenting late, followed by aggressive post-op physiotherapy can lead to excellent recovery of hand function

Role of Finance in Yoga Related to Health, Education and Corporate Sector

Implementation of Yoga as a nation-wide intervention requires multiprong approaches. The government’s active involvement in terms of encouraging policies, inherent interest blooming within the general masses, and facilitating-service organizations have great roles to play in making Yoga as a mass social movement in action. But for all these to be fully realized in terms of ground realities, there is a large amount of financial investment and spending are involved. Unless Yoga scientists understand the financial flow aspects surrounding Yoga evidently, experimentally and quantitatively, the society cannot create an innovative program to popularize Yoga to appeal the majority of the population. To this effect, the search revealed no substantial contributions studying the financial implications of Yoga in those different aspects where Yoga has penetrated well

Clinical outcomes in management of unstable distal radius fractures treated with external fixation and internal fixation: a prospective comparative study

Background: Management of Distal Radius fracture that are inherently unstable is still a matter of debate. There is no conclusive evidence that support one surgical fixation method over another. An attempt was made to analyze patients treated with Ex-Fix and Internal-Fixation for unstable distal radius fractures and evaluate the clinical efficacy of Ex-fix using principles of ligamentotaxis and Internal-fixation and compare functional recovery, fracture healing time and complications.Methods: A prospective trial was undertaken at our hospital with 35 patients,all aged >20 yrs with closed distal radius fracture and divided into two groups: group I (Ex-fix with or without percutaneous k-wire, and JESS) and group II (Int-Fixation) including 14 and 21 patients, respectively. Periodic clinical examination and x-ray review was carried out to find out fracture union, and functional assessment. Patients were followed up for 1 year, 6 months average.Results: Group I consumed significant less operative time, fluoroscopic exposure, reduced hospital stay, quicker post-operative pain relief. Quick DASH score were significantly high in elderly treated with Ex-Fix in comparison to young in which DASH score was higher with internal-fixator. Functional recovery was early with int-fixation but post-operative wrist stiffness was also higher. 2 cases of delayed wound healing &1 case of pin tract infection with ex-fix application was observed. Conclusions: Internal-fixation remains the treatment of choice for unstable distal radius fracture involving the articular surface and in the young, while ext-fixation can be considered as a primary treatment modality in the extra-articular fractures in young or even intra-articular fractures in the elderly

Properties of concrete incorporating sand and cement with waste marble powder

Marble is a metamorphic rock used widely in construction which increases amount of marble powder obtained from it. Marble powder is a waste product obtained from marble during its processing. Marble waste is high in calcium oxide content which is cementing property but it creates many environmental hazards too if left in environment or in water. In this research, partial replacement of cement and sand by waste marble powder (WMP) has been investigated. Seven concrete mixtures were prepared for this investigation by partially replacing cement, sand with WMP at proportions of 0%, 10% and 15% by weight separately and in combined form. To determine compressive strength, flexural strength and split tensile strength of concrete made with waste marble powder, the samples at the curing ages of 7, 28 and 90 days was recorded. Different tests of durability were applied on samples like ultrasonic pulse wave test, absorption and sorptivity. For further investigation all the results were compared and noticed that WMP has shown good results and enhancing mechanical properties of concrete mix on partially replacing with sand and cement in set proportions. Moreover, it will solve the problem of environmental health hazard.peer-reviewe

Improving compressive strength of low calcium fly ash geopolymer concrete with alccofine

Geopolymer concrete is environmentally friendly and could be considered as a construction material to promote the sustainable development. In this paper fly ash based geopolymer concretes with different percentages of alccofine were made by mixing sodium hydroxide and sodium silicate as an alkaline activator and cured at ambient as well as heat environment in an electric oven at 90°C. Effects of various parameters such as the percentage of alccofine, curing temperature, a period of curing, fly ash content, was studied on compressive strength as well as workability of geopolymer concrete. The study concludes that the presence of alccofine improves the properties of geopolymer concrete during a fresh and hardened state of concrete. Geopolymer concrete in the presence of alccofine can be used for the general purpose of concrete as required compressive strength can be achieved even at ambient temperature. The 28 days compressive strength of 73 MPa, when cured at 90-degree Celsius, confirmed that it is also very suitable for precast concrete components.peer-reviewe

Origin and spread of human mitochondrial DNA haplogroup U7

Human mitochondrial DNA haplogroup U is among the initial maternal founders in Southwest Asia and Europe and one that best indicates matrilineal genetic continuity between late Pleistocene hunter-gatherer groups and present-day populations of Europe. While most haplogroup U subclades are older than 30 thousand years, the comparatively recent coalescence time of the extant variation of haplogroup U7 (~16–19 thousand years ago) suggests that its current distribution is the consequence of more recent dispersal events, despite its wide geographical range across Europe, the Near East and South Asia. Here we report 267 new U7 mitogenomes that – analysed alongside 100 published ones – enable us to discern at least two distinct temporal phases of dispersal, both of which most likely emanated from the Near East. The earlier one began prior to the Holocene (~11.5 thousand years ago) towards South Asia, while the later dispersal took place more recently towards Mediterranean Europe during the Neolithic (~8 thousand years ago). These findings imply that the carriers of haplogroup U7 spread to South Asia and Europe before the suggested Bronze Age expansion of Indo-European languages from the Pontic-Caspian Steppe region