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A Simulation of the Dependence of Tidal Interaction on Galaxy Type in Compact Groups

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International j.urnal of Astronomy and Astrophysics 2024年第2期14卷 85-100页

作者： Mark j. Henriksen Mateo Mej.a Department of Physics University of Maryland Baltimore USA

We have investigated the role that different galaxy types have in galaxy-galaxy interactions in compact groups. N-body simulations of 6 galaxies consisting of a differing mixture of galaxy types were run to compare the relative importance of galaxy population demographic on evolution. Three different groups with differing galaxy content were tested: all spiral, a single elliptical and 50% elliptical. Tidal interaction strength and duration were recorded to assess the importance of an interaction. A group with an equal number of spiral and elliptical galaxies has some of the longest and strongest interactions with elliptical-elliptical interactions being most significant. These elliptical-elliptical interactions are not dominated by a single large event but consist of multiple interactions. Elliptical galaxies tidally interacting with spiral galaxies, have the next strongest interaction events. For the case when a group only has a single elliptical, the largest magnitude tidal interaction is an elliptical on a spiral. Spirals interact with each other through many small interactions. For a spiral only group, the interactions are the weakest compared to the other group types. These spiral interactions are not dominated by any singular event that might be expected to lead to a merger but are more of an ongoing harassment. These results suggest that within a compact group, early type galaxies will not form via merger out of an assemblage of spiral galaxies but rather that compact groups, in effect form around an early type galaxy.

关键词： Galaxy Groups Galaxy Clusters Galaxy Evolution N-Body Simulations

Generalized Hopf Bifurcation in a Delay Model of Neutrophil Cells Model

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International j.urnal of Modern Nonlinear Theory and Application 2024年第2期13卷 11-28页

作者： Suqi Ma S. j. Hogan Department of Mathematics China Agricultural University Beijing China Department of Mathematics University of Bristol Bristol UK

The DDE-Biftool software is applied to solve the dynamical stability and bifurcation problem of the neutrophil cells model. Based on Hopf point finding with the stability property of the equilibrium solution loss, the continuation of the bifurcating periodical solution starting from Hopf point is exploited. The generalized Hopf point is tracked by seeking for the critical value of free parameter of the switching phenomena of the open loop, which describes the lineup of bifurcating periodical solutions from Hopf point. The normal form near the generalized Hopf point is computed by Lyapunov-Schimdt reduction scheme combined with the center manifold analytical technique. The near dynamics is classified by geometrically different topological phase portraits.

关键词： Generalized Hopf Bifurcation DDE-Biftool Software Norm Form

Prehospital transdermal glyceryl trinitrate for ultra- acute ischaemic stroke: data from the RIGHT- 2 randomised sham- controlled ambulance trial

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Stroke & Vascular Neurology 2024年第1期9卷 38-49,I0035-I0046页

作者： j.son Philip Appleton Lisa j.Woodhouse Craig S anderson Sandeep Ankolekar Lesley Cala Mark Dixon Timothy j.England Kailash Krishnan Grant Mair Keith W Muir j.hn Potter Christopher I Price Marc Randall Thompson G Robinson Christine Roffe Else C Sandset j.ffrey L Saver Angela Shone Aloysius Niroshan Siriwardena j.anna M Wardlaw Nikola Sprigg Philip M Bath Stroke University Hospitals Birmingham NHS Foundation TrustBirminghamUK Institute of Applied HealthResearch University of Birmingham College of Medical and Dental SciencesBirminghamUK Stroke Trials Unit Mental Health and Clinical NeurosciencesUniversity of NottinghamNottinghamUK Faculty of Medicine The George Institute for Global HealthSydneyNew South WalesAustralia The George Institute China at Peking University Health Science Center BeijingChina Neurology Royal Prince Alfred HospitalSydney Health PartnersSydneyNew South WalesAustralia Department of Neurology King's College Hospital NHS Foundation TrustLondonUK Faculty of Health and Medical Sciences University of Western AustraliaCrawleyWestern AustraliaAustralia East Midlands Ambulance Service NHS Trust NottinghamUK Stroke Queen's Medical CentreNottingham University Hospitals NHS TrustNottinghamUK Centre for Clinical Brain Sciences Dementia Research InstituteUniveristy of EdinburghEdinburghUK Institute of Neurology and Psychology University of GlasgowGlasgowUK Bob Champion Research and Education Building University of East AngliaNorwichUK Institute of Neuroscience Newcastle UniversityNewcastle upon TyneUK Department of Neurology Leeds Teaching Hospitals NHS TrustLeedsUK Department of Cardiovascular Sciences and NIHR Leicester Biomedical Research Centre University of LeicesterLeicesterUK Stroke Research in Stoke Institute for Science and Technology in MedicineKeele UniversityStoke-on TrentUK Department of Neurology Oslo University HospitalOsloNorway Research and Development Norwegian Air Ambulance FoundationOsloNorway Department of Neurology and Comprehensive Stroke Center David Geffen School of MedicineUCLALos AngelesCaliforniaUSA Research and Graduate Services University of NottinghamNottinghamUK Community and Health Research Unit University of LincolnLincolnUK

Background The effect of transdermal glyceryl trinitrate(GTN,a nitrovasodilator)on clinical outcome when administered before hospital admission in suspected stroke patients is ***,we assess the safety and efficacy of GTN in the prespecified subgroup of patients who had an ischaemic stroke within the Rapid Intervention with Glyceryl trinitrate in Hypertensive stroke Trial-2(RIGHT-2).Methods RIGHT-2 was an ambulance-based multicentre sham-controlled blinded-endpoint study with patients randomised within 4hours of *** primary outcome was a shift in scores on the modified Rankin scale(mRS)at day *** outcomes included death;a global analysis(Wei-Lachin test)containing Barthel Index,EuroQol-5D,mRS,telephone interview for cognitive status-modified and Zung depression scale;and neuroimaging-determined‘brain frailty’*** were reported as n(%),mean(SD),median[IQR],adj.sted common OR(acOR),mean difference or Mann-Whitney difference(MWD)with 95%*** 597 of 1149(52%)patients had a final diagnosis of ischaemic stroke;age 75(12)years,premorbid mRS>2107(18%),Glasgow Coma Scale 14(2)and time from onset to randomisation 67[45,108]***‘brain frailty’was common:median score 2[2,3](range 0–3).At day 90,GTN did not influence the primary outcome(acOR for increased disability 1.15,95%CI 0.85 to 1.54),death or global analysis(MWD 0.00,95%CI-0.10 to 0.09).In subgroup analyses,there were non-significant interactions suggesting GTN may be associated with more death and dependency in participants randomised within 1hour of symptom onset and in those with more severe *** In patients who had an ischaemic stroke,ultra-acute administration of transdermal GTN in the ambulance did not improve clinical outcomes in a population with more clinical and radiological frailty than seen in previous in-hospital *** IS ALREADY KNOWN ON THIS TOPIC⇒Transdermal glyceryl trinitrate(GTN)was associat-ed with less death and dependency in those w

关键词： Glasgow nitrate random

The Oral Health Status of Person with Special Needs in Kumasi

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Open j.urnal of Stomatology 2024年第1期14卷 14-31页

作者： Ama Agyeibea Amuasi Alexander Oti-Acheampong Victoria N. A. Boadu Lord j. j. Gowans The Department Child Oral Health & Orthodontics School of Medicine and Dentistry College of Health Sciences Kwame Nkrumah University of Science and Technology Kumasi Ghana The Department of Oral & Maxillofacial Sciences School of Medicine and Dentistry College of Health Sciences Kwame Nkrumah University of Science and Technology Kumasi Ghana The Department of Community Dentistry School of Medicine and Dentistry College of Health Sciences Kwame Nkrumah University of Science and Technology Kumasi Ghana

Background: The most prevalent non-communicable disease worldwide is oral health-related disease, with dental caries and periodontal conditions being common. Oral health status significantly impacts overall health and quality of life. Barriers to dental care affect children with special needs. This study evaluates the oral health status and treatment requirements of people with special needs. Methodology: This descriptive cross-sectional study in Kumasi, Ghana examined oral health status among people, 121 children with special needs over two months, in j.ne-j.ly 2022. Dental caries, periodontal changes, malocclusion, and trauma were assessed. The data was analyzed using SPSS 20.0. Results: The oral health status among people with special needs in this study was generally moderate, with a range from very good to very poor. The prevalence of dental caries was 37%, with a mean DMFT score of 2.82. Periodontal health showed unsatisfactory indicators such as mobile teeth, poor gingival health, high plaque scores, and the presence of halitosis. Conclusion: This descriptive study aimed to provide baseline data on the oral health status of special needs students in Kumasi, addressing the lack of knowledge in this area. It highlighted the importance of dental care in maintaining good oral health and overall well-being in individuals with special needs. Coordinated efforts by dental professionals are needed to provide dental health education and preventive interventions for these children.

关键词： Special Needs Oral Health Dental Caries Periodontal Diseases Malocclusion

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德国历史哲学传统中的理念论及其批判

世界哲学 2024年第4期 54-62页

作者：尉佩云 [德]j.吕森山西大学历史文化学院埃森高等人文研究所

在德国的学术传统中,历史哲学具有漫长的学术历程,它伴随着历史学职业化的过程而形成、发展。在初创及此后的语境中,它成为一种思考过去的全新的学术领域和学术形式。在德国历史哲学开端之处,理念论便主导了这个思想传统,这种影响一直... 详细信息

在德国的学术传统中,历史哲学具有漫长的学术历程,它伴随着历史学职业化的过程而形成、发展。在初创及此后的语境中,它成为一种思考过去的全新的学术领域和学术形式。在德国历史哲学开端之处,理念论便主导了这个思想传统,这种影响一直延续至今。我们可以从四个方面来审视理念论在德国历史哲学中的影响,以启蒙运动之后的德国历史哲学演变的四个先后相序的阶段或形式为题,这分别是理念论的历史哲学,理念论的历史方法论,理念论的历史认识论和理念论视角下诗性与修辞的历史书写。在今天,理念论失去了在方法论上的合理性,但如果历史学还是建立在人类生活形式的解释学基础之上的学科,那么理念论的学术思考就仍然有必要进行批判性反思。将人类受难等现实主义思考纳入其中,在我们将这种现实主义进行人文化的时候,理念论在当下语境中应该获得进一步批判性思考。

关键词：理念论历史哲学史学职业化历史认识论诗性史学

Full Dynamic Model for Liquid Sloshing Simulation in Cylindrical Tank Shape

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World j.urnal of Mechanics 2024年第4期14卷 55-72页

作者： Omar Noui Mohamed Bouazara Marc j. Richard Department of Applied Science University of Quebec at Chicoutimi Chicoutimi Canada Department of Mechanical Engineering Laval University Quebec Canada

This study presents a comprehensive full dynamic model designed for simulating liquid sloshing behavior within cylindrical tank structures. The model employs a discretization approach, representing the liquid as a network of interconnected spring-damper-mass systems. Key aspects include the adaptation of liquid discretization techniques to cylindrical lateral cross-sections and the calculation of stiffness and damping coefficients. External forces, simulating various vehicle maneuvers, are also integrated into the model. The resulting system of equations is solved using Maple Software with the Runge-Kutta-Fehlberg method. This model enables accurate prediction of liquid displacement and pressure forces, offering valuable insights for tank design and fluid dynamics applications. Ongoing refinement aims to broaden its applicability across different liquid types and tank geometries.

关键词： Fluid-Structure Interaction Equivalent Mechanical Model Liquid Discretization Spring-Mass Model Spring-Mass Network Liquid Simulation

Kikuchi-Fuj.moto Disease: A Case of Lymphadenitis Following COVID-19 Infection

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Open j.urnal of Rheumatology and Autoimmune Diseases 2024年第3期14卷 118-124页

作者： j.spreet Dhillon Bhagvat j. Maheta Neeladri Misra Department of Internal Medicine Sutter Roseville Medical Center Roseville CA USA California Northstate University College of Medicine Elk Grove CA USA

Introduction: Kikuchi-Fuj.moto disease (KFD), also known as histiocytic necrotizing lymphadenitis, is a rare disease of uncertain origin proposed to be secondary to viral or autoimmune causes. It presents as unilateral cervical lymphadenopathy and fever, typically resolving within a few months, however, it mimics malignant lymphoma, leading to extensive work-up fearing malignancy. Case History: A 33-year-old female with a history of Sj.gren’s syndrome, rheumatoid arthritis (not on immunosuppressive therapy) and recent COVID-19 infection two months ago presented with episodes of flu-like symptoms;fever (101˚F), chills, and myalgias for two months. Upon evaluation, she had leukopenia (WBC 1.8 k/uL), neutropenia (1.0 k/uL), elevated CRP (134 mg/L), and CT neck demonstrated multiple enlarged cervical lymph nodes with necrosis. The patient was started on Cefdinir and doxycycline for a possible atypical infection given neutropenic fevers and the patient continued to have fevers. A biopsy showed focal necrosis with no evidence of malignancy, suggesting KFD that was likely triggered by a recent COVID infection. She was treated with Prednisone and naproxen, which led to an improvement in symptoms and recovery of her pancytopenia. Discussion: This case is unique since the patient’s recent infection with COVID-19 may have triggered the clinical manifestations of KFD. There have been a few case reports of children who were diagnosed with KFD after a COVID-19 infection and adults diagnosed with KFD following COVID vaccinations;however, this is the first case report involving a young adult in her thirties who was diagnosed with KFD two months after COVID-19.

关键词： Kikuchi-Fuj.moto Disease COVID-19 Rheumatology

RETRACTED: Nuclear Structure Study of Odd-Odd Yttrium Nuclei within Interacting-Boson Fermi-Fermion Model (IBFFM)

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j.urnal of Applied Mathematics and Physics 2024年第6期12卷 2020-2031页

作者： Afrah j. Mohaisen Saad N. Abood Physics Department College of Science Al-Nahrain University Baghdad Iraq

Short Retraction NoticeThe paper does not meet the standards of "j.urnal of Applied Mathematics and Physics". This article has been retracted to straighten the academic record. In making this decision the Editorial Board follows COPE's Retraction Guidelines. The aim is to promote the circulation of scientific research by offering an ideal research publication platform with due consideration of internationally accepted standards on publication ethics. The Editorial Board would like to extend its sincere apologies for any inconvenience this retraction may have *** guiding this retraction: Prof. Wen-Xiu Ma (EiC of j.MP)The full retraction notice in PDF is preceding the original paper, which is marked "RETRACTED".

关键词： Nuclear Structure Yttrium Nuclei Interacting Boson-Fermion Model Energy Spectra Electromagnetic Transition Rates

Cluster Modulation: A Generalized Modulation Scheme Leading to NOMA or Adaptive Modulation

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j.urnal of Computer and Communications 2024年第7期12卷 12-22页

作者： j.mal S. Rahhal Suliman j. Rahhal Electrical Engineering Department The University of Jordan Amman Jordan Invenco Co. Tampa USA

The need for higher data rate and higher systems capacity leads to several solutions including higher constellation size, spatial multiplexing, adaptive modulation and Non-Orthogonal Multiple Access (NOMA). Adaptive Modulation makes use of the user’s location from his base station, such that, closer users get bigger constellation size and hence higher data rate. A similar idea of adaptive modulation that makes use of the user’s locations is the NOMA technique. Here the base station transmits composite signals each for a different user at a different distance from the base station. The transmitted signal is formed by summing different user’s constellations with different weights. The closer the users the less average power constellation is used. This will allow the closer user to the base station to distinguish his constellation and others constellation. The far user will only distinguish his constellation and other user’s data will appear as a small interference added to his signal. In this paper, it is shown that the Adaptive modulation and the NOMA are special cases of the more general Cluster Modulation technique. Therefore, a general frame can be set to design both modulation schemes and better understanding is achieved. This leads to designing a multi-level NOMA and/or flexible adaptive modulation with combined channel coding.

关键词： Cluster Modulation Adaptive Modulation NOMA