Utjecaj negativnih iona na ionsko-zvučne solitarne valove u plazmi s dvije temperature elektrona

Ion-acoustic solitary waves in a drift negative ion plasma have been investigated for two-electron temperatures. Tagare and Reddy studied the effect of higher-order nonlinearity on ion-acoustic waves with cold positive and negative ions for isothermal and non-isothermal electrons using reductive perturbation technique. In this work, we study warm positive and negative ions with two-temperature isothermal electrons using the pseudopotential method. It is found that the concentration of negative ions, drift velocities, mass ratios, equal temperatures of ions (particular case) and presence of two groups of electrons and their ratios modify the profiles of the Sagdeev pseudopotential curves of the solitary waves in the plasma of the first- (φ1) and second-order (φ2) solitary-wave solutions.Istražujemo ionsko-zvučne solitarne valove u protječnoj negativnoj plazmi s dvije temperature elektrona. Tagare i Reddy su proučavali učinak nelinearnosti višeg reda na ionsko-zvučne valove s hladnim pozitivnim i negativnim ionima primjenom reduktivne metode smetnje. U ovom se radu proučavaju vrući pozitivni i negativni ioni metodom pseudopotencijala. Nalazimo da koncentracija negativnih iona, brzine protjecanja, omjeri masa, poseban slučaj jednakih temperatura iona i prisutnost dvije grupe elektrona i njihov omjer mijenjaju profile krivulja Sagdeevog pseudopotencijala solitarnih valova u plazmi za rješenja prvog (φ1) i drugog (φ2) reda

Utjecaj negativnih iona na ionsko-zvučne solitarne valove u plazmi s dvije temperature elektrona

Ion-acoustic solitary waves in a drift negative ion plasma have been investigated for two-electron temperatures. Tagare and Reddy studied the effect of higher-order nonlinearity on ion-acoustic waves with cold positive and negative ions for isothermal and non-isothermal electrons using reductive perturbation technique. In this work, we study warm positive and negative ions with two-temperature isothermal electrons using the pseudopotential method. It is found that the concentration of negative ions, drift velocities, mass ratios, equal temperatures of ions (particular case) and presence of two groups of electrons and their ratios modify the profiles of the Sagdeev pseudopotential curves of the solitary waves in the plasma of the first- (φ1) and second-order (φ2) solitary-wave solutions.Istražujemo ionsko-zvučne solitarne valove u protječnoj negativnoj plazmi s dvije temperature elektrona. Tagare i Reddy su proučavali učinak nelinearnosti višeg reda na ionsko-zvučne valove s hladnim pozitivnim i negativnim ionima primjenom reduktivne metode smetnje. U ovom se radu proučavaju vrući pozitivni i negativni ioni metodom pseudopotencijala. Nalazimo da koncentracija negativnih iona, brzine protjecanja, omjeri masa, poseban slučaj jednakih temperatura iona i prisutnost dvije grupe elektrona i njihov omjer mijenjaju profile krivulja Sagdeevog pseudopotencijala solitarnih valova u plazmi za rješenja prvog (φ1) i drugog (φ2) reda

Modified “Trap Door” Approach for Thoracic Outlet Syndrome Complicated by Subclavian Artery Aneurysm

Arterial thoracic syndrome is a rare condition that usually presents in young patients with upper extremity thromboembolization. The traditional surgical approaches described are supraclavicular and transaxillary. We hereby present the case of a 46-year-old male with left arterial thoracic outlet syndrome and left subclavian artery aneurysm. We describe our technique in approaching his condition with a modified “trap door” approach

Plans for building a prototype SKA regional centre in India

In order to deliver the full science potential of the Square Kilometer Array (SKA) telescope, several SKA Regional Centres (SRCs) will be required to be constructed in different SKA member countries around the world. These SRCs will provide high performance compute and storage for the generation of advanced science data products from the basic data streams generated by the SKA Science Data Handling and Processing system, critically necessary to the success of the key science projects to be carried out by the SKA user community. They will also provide support to astronomers to enable them to carry out analysis on very large SKA datasets. Construction of such large data centres is a technical challenge for all SKA member nations. In such a situation, each country plans to construct a smaller SRC over the next few years (2022 onwards), known as a proto-SRC. In India, we propose to construct a proto-SRC which will be used for the analysis of data from SKA pathfinders and precursors with strong Indian involvement such as uGMRT, Meerkat and MWA. We describe our thinking on some aspects of the the storage, compute and network of the proto-SRC and how it will be used for data analysis as well as for carrying out various simulations related to SKA key science projects led by Indian astronomers. We also present our thoughts on how the proto-SRC plans to evaluate emerging hardware and software technologies and to also begin software development in areas of relevance to SKA data processing and analysis such as algorithm implementation, pipeline development and data visualisation software.Comment: 7 pages, 2 figures, accepted for publication for the special issue on "Indian participation in the SKA" in the Journal of Astrophysics and Astronomy (JoAA

MEC-Intelligent Agent Support for Low-Latency Data Plane in Private NextG Core

Private 5G networks will soon be ubiquitous across the future-generation smart wireless access infrastructures hosting a wide range of performance-critical applications. A high-performing User Plane Function (UPF) in the data plane is critical to achieving such stringent performance goals, as it governs fast packet processing and supports several key control-plane operations. Based on a private 5G prototype implementation and analysis, it is imperative to perform dynamic resource management and orchestration at the UPF. This paper leverages Mobile Edge Cloud-Intelligent Agent (MEC-IA), a logically centralized entity that proactively distributes resources at UPF for various service types, significantly reducing the tail latency experienced by the user requests while maximizing resource utilization. Extending the MEC-IA functionality to MEC layers further incurs data plane latency reduction. Based on our extensive simulations, under skewed uRLLC traffic arrival, the MEC-IA assisted bestfit UPF-MEC scheme reduces the worst-case latency of UE requests by up to 77.8% w.r.t. baseline. Additionally, the system can increase uRLLC connectivity gain by 2.40x while obtaining 40% CapEx savings

Conceptual Design of a Manufacturing Process for an Automotive Microchannel Heat Exchanger

Calls for higher fuel efficiency in the United States and Europe are driving the need for waste heat recovery in automotive markets. While conventional heat exchangers can be designed to meet the heat duty requirement, the resulting volume, weight, and thermal mass are too large for rapid transient response and packaging of the device. The lightweight, compact form factor of microchannel heat exchangers with submillimeter flow passages is attractive for automotive applications. However, the industrial use of microchannel heat exchangers continues to be inhibited by high manufacturing costs. The objective of this paper is to develop a microchannel heat exchanger concept capable of meeting the cost and performance goals for an automotive application. So-called printed-circuit microchannel heat exchangers are produced using a stacked-lamina approach in which individual metal laminae are photochemically machined and diffusion bonded. Here, the conceptual design of a microchannel heat exchanger produced using more conventional stamping and joining technologies is discussed for an automotive application. The device is sized to provide waste heat recovery from an exhaust stream to engine coolant for a representative passenger vehicle with acceptable pressure loss. Using the specified design, a process-based cost model is presented showing cost modeling efforts to date including the capital investment and cost-of-goods-sold as a function of annual production volume. The initial results show a pathway for the cost effective integration of compact microchannel heat exchangers into advanced vehicle thermal management systems

Measles delay in India: the role of parents’ behaviour

Background: Objectives were to identify the factors influencing the timeliness of measles immunisation in India, as well as to explore whether parental behaviour in health care seeking facilities varies depending on the gender of child.Methods: A cross-sectional study was undertaken in India using secondary data from the fourth phase of the district level household and facility survey (DLHS 4). To estimate the age-specific coverage rates scientifically and thoroughly Kaplan-Meier survival analysis was applied. The risk factors for delayed measles immunisation were identified by using cox proportional hazard regression model.Results: Individual factors, social factors, awareness, and facilitatory factors all have a significant impact on the timeliness of measles immunisation in India. Additionally, it can also be concluded that in the case of a male child, institutional delivery significantly improves health-seeking behaviour among the parents compared to a female child. Conclusions: Numerous elements like the place of residence, economic position, and caste limit the timeliness of measles immunisation in India. Parents' health-seeking behaviour is also significant in the list of influential factors, like mother’s antenatal visit during pregnancy, the child's place of delivery, and motivation for child immunisation. In India child's gender and birth order discovered to have an impact on measles immunisation timeliness. Furthermore, we discovered that parents' health-seeking behaviour is not gender-neutral, but rather favours male child more.