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Additive Maps on Matrix Algebras Preserving Invertibility or Singularity

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Acta Mathematica Sinica,English Series 2005年第4期21卷 681-684页

作者： ajda fo ner Peter EMRL Department of Mathematics PeF University of Maribor.Koro ka cesta 160.SI-2000 MariborSlovenia Department of Mathematics University of LjubljanaJadranska 19SI-1000 LjubljanaSlovenia

We characterize the additive singularity preserving almost surjective maps on Mn （F）, the algebra of all n×n matrices over a field F with char F=0. We also describe additive invertibility preserving surjective maps... 详细信息

关键词： Additive map Invertibility preserver Singularity preserver

Anterior mediastinal masses and thymic cysts

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World Journal of Clinical Cases 2025年第4期13卷 1-7页

作者： ÖnerÖzdemir Department of Pediatric Allergy and Immunology Sakarya Research and Training HospitalSakarya University Medical FacultyAdapazarı54100SakaryaTürkiye

Cystic lesions of the anterior mediastinum in children suggest a well-known group of benign lesions that are comparatively *** cysts(TCs)are mostly positioned in the anterior mediastinum and some patients in the *** TCs classified as congenital intra-thoracic mesothelial cysts are commonly asymptomatic and have slight clinical *** TC,which can mimic another anterior mediastinal cystic tumor and is seen in adults,is more clinically *** is a sporadic mediastinal lesion thought to arise in the course of acquired *** mediastinal cysts represent 3%-6%of all mediastinal tumors and 10%-18%of radiologically reported mediastinal *** TCs are uncommon and it is hard to know their true *** 60%of cases with mediastinal TCs are asymptomatic,and the remainder of patients complains of nonspecific symptoms(e.g.,chest pain,dyspnea,or cough).The literature suggests that most cysts are benign,but an indefinite percentage may have a neoplastic process and result in significant compressive symptoms over *** symptoms of TCs vary depending on the *** addition,frequent symptoms at the appearance of enlarged benign thymic and mediastinal cysts generally contain compressive symptoms(e.g.,respiratory distress,thymic pain,and symptoms related to Horner syndrome,hoarseness,dysphonia,dyspnea,orthopnea,wheezing,and fever).Many TCs have cystic density and a neat border and are simple to diagnose with radiological ***,some TCs are hard to identify before surgery and may be misidentified as thymomas depending on their site and computed tomography *** by thoracotomy,median sternotomy,or video-assisted techniques is essential for conclusive diagnosis,management,and abolition of relapse of anterior mediastinal masses and *** examination may be required after *** the extent of the mass and the preliminary inability to make a definitiv

关键词： Mediastinal mass Thymic cyst Malignant tumor Cysts Thymoma Computer tomography

Fecal microbiota transplantation in allergic diseases

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World Journal of Methodology 2025年第2期15卷 83-91页

作者： Ece TüsüzÖnata ÖnerÖzdemir Division of Pediatric Allergy and Immunology Medical FacultySakarya UniversityAdapazarı54100SakaryaTürkiye

Microorganisms such as bacteria,fungi,viruses,parasites living in the human intestine constitute the human intestinal *** refers to composi-tional and quantitative changes that negatively affect healthy gut *** recent years,with the demonstration that many diseases are associated with dysbiosis,treatment strategies targeting the correction of dysbiosis in the treat-ment of these diseases have begun to be *** microbiota trans-plantation(FMT)is the process of transferring faeces from a healthy donor to another recipient in order to restore the gut microbiota and provide a therapeutic *** studies have gained popularity after probiotic,prebiotic,symbiotic studies in the treatment of dysbiosis and related *** has emerged as a potential new therapy in the treatment of allergic diseases as it is associated with the maintenance of intestinal microbiota and immunological balance(T helper 1/T helper 2 cells)and thus suppression of allergic *** this article,the definition,application,safety and use of FMT in allergic diseases will be discussed with current data.

关键词： Microbiota Dysbiosis Faecal microbiota transplantation Allergic diseases

On Generalized （m, n）-Derivations and Generalized （m, n）-Jordan Derivations in Rings

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Algebra Colloquium 2014年第3期21卷 411-420页

作者： Shakir Ali ajda fosnert Department of Mathematics Aligarh Muslim University Aligarh-202002 India Faculty of Management University of Primorska Cankarjeva 5 SI-6104 Koper Slovenia

The aim of this paper is to define the notions of generalized （m, n）-derivations and generalized （m, n）：Jordan derivations and to prove two theorems involving these map- pings.

关键词： prime ring semiprime ring generalized (m n)-derivation generalized (m n)-Jordan derivation

基于LBM-IBM-DEM多孔介质内双/三颗粒迁移特性研究

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工程热物理学报 2025年第1期46卷 164-169页

作者：沈小又朱康宁佛斌蔡杰席剑飞顾中铸南京师范大学能源与机械工程学院南京210023

本文为构建数值模拟模型,通过格子Boltzmann法求解液相流场,在模拟中采用IBM和DEM描述细颗粒在拉格朗日坐标下的受力、运动、碰撞和轨迹追踪,通过模拟双/三颗粒在多孔介质内的迁移,研究细颗粒之间的相互干涉,结果表明细颗粒在多孔介质... 详细信息

本文为构建数值模拟模型,通过格子Boltzmann法求解液相流场,在模拟中采用IBM和DEM描述细颗粒在拉格朗日坐标下的受力、运动、碰撞和轨迹追踪,通过模拟双/三颗粒在多孔介质内的迁移,研究细颗粒之间的相互干涉,结果表明细颗粒在多孔介质内的迁移受到其他细颗粒的干涉,该干涉依赖于介质内的流体,当一个细颗粒堵塞时,压力分布会重新调整影响其他细颗粒的迁移,同时其他细颗粒的存在可促进或阻碍细颗粒在多孔介质内的迁移。

关键词：多孔介质格子Boltzmann方法孔隙率穿透率

Changes in carbon stocks of soil and forest floor in black pine plantations in Turkey

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Journal of forestry Research 2021年第1期32卷 339-347页

作者： SükrüTeoman Güner Dilek Güner General Directorate of forestry Research Institute for Forest Soil and Ecology26160 EskisehirTurkey

The objectives of this study were:(1)to determine carbon stock changes in the soil and forest floor of black pine(Pinus nigra ***)plantations in Turkey;(2)to determine the effects of thinning on annual carbon accumulation in both;and,(3)to investigate relationships between annual carbon storage in soil and forest floor and stand characteristics of black *** were taken in 90 plots from stands at the pole(dbh=11.0–19.9 cm)and sawlog(dbh=20.0–35.9 cm)*** analyses of soil and forest floor samples showed that in unthinned plantations signifi cant organic carbon was sequestered an average of 1.47 Mg ha^−1 a^−1 in the soil and 0.20 Mg ha^−1 a^−1 in the forest *** carbon sequestered annually in the soil was signifi cantly lower in thinned than in unthinned stands,while diff erences in the forest floor were insignifi *** were positive correlations between carbon sequestered in the soil and stand age,average DBH,mean stand height,basal area,and site *** sequestered the forest floor increased with basal *** a result,carbon sequestered in the soil should not be ignored in greenhouse gas inventories because carbon stored belowground was approximately 70%of the aboveground pool.

关键词： Pinus nigra Belowground forest floor Carbon sequestration Thinning

Exact solutions of nonlinear fractional differential equations by (G'/G)-expansion method

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Chinese Physics B 2013年第11期22卷 140-145页

作者： Ahmet Bekir zkan Güner Eskisehir Osmangazi University Art-Science Faculty Department of Mathematics-Computer Dumlup nar University School of Applied Sciences Department of Management Information Systems

In this paper, we use the fractional complex transform and the （G＇/G）-expansion method to study the nonlinear fractional differential equations and find the exact solutions. The fractional complex transform is proposed to convert a partial fractional differential equation with Jumarie＇s modified Riemann-Liouville derivative into its ordinary differential equation. It is shown that the considered transform and method are very efficient and powerful in solving wide classes of nonlinear fractional order equations.

关键词： (G'/G)-expansion method time-fractional Burgers equation fractional-order biological popula-tion model space-time fractional Whitham-Broer-Kaup equations

Current and efficiency of Brownian particles under oscillating forces in entropic barriers

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Chinese Physics B 2015年第4期24卷 82-89页

作者： Ferhat Nutku Ekrem Aydιner Theoretical Physics Research Group Department of Physics Faculty of Sciencestanbul University

In this study, considering the temporarily unbiased force and different forms of oscillating forces, we investigate the current and efficiency of Brownian particles in an entropic tube structure and present the numerically obtained results. We show that different force forms give rise to different current and efficiency profiles in different optimized parameter intervals. We find that an unbiased oscillating force and an unbiased temporal force lead to the current and efficiency, which are dependent on these parameters. We also observe that the current and efficiency caused by temporal and different oscillating forces have maximum and minimum values in different parameter intervals. We conclude that the current or efficiency can be controlled dynamically by adjusting the parameters of entropic barriers and applied force.

关键词： entropic barrier Brownian motion Fick-Jacobs equation efficiency of Brownian motor stochastic processes

Effect of dysprosium substitution on magnetic and structural properties of NiFe2O4 nanoparticles

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Journal of Rare Earths 2019年第8期37卷 871-878,I0004页

作者： MAAlmessiere YSlimani SGüner ABaykal IErcan Department of Physics College of ScienceImam Abdulrahman Bin Faisal UniversityP.O.Box 198231441 DammamSaudi Arabia Department of Nano-Medicine Research Institute for Research&Medical Consultations(IRMC)Imam Abdulrahman Bin Faisal UniversityP.O.Box 198231441 DammamSaudi Arabia Department of Biophysics Institute for Research&Medical Consultations(1RMC)Imam Abdulrahman Bin Faisal UniversityP.O.Box 198231441 DammamSaudi Arabia Institute of Inorganic Chemistry RWTH Aachen UniversityD-52074 AachenGermany

This work investigated the effect of dysprosium(Dy)ions on the structural,microstructural and magnetic properties of nickel nanospinelferrite,NiFe2 *** nanoparticles(NPs)of NiDyxFe(2-x)O4(0.0≤x≤0.1)were prepared via the hydrothermal *** formation of cubic phase of Ni nanoferrite was confirmed through X-ray diffraction,field emission scanning and transmission electron ***,the magnetic properties of NiDyxFe(2-x)P4(0.01≤x≤0.10)NPs were *** magnetization versus field,M(H)curves exhibit super paramagnetic nature at room temperature and ferrimagnetic nature at low temperature(10 K).A noticeable improvement in the different deduced magnetic parameters is obtained especially for the NiDy(0.07)Fe(1.93)O4(x=0.07)*** obtained result is mostly derived from the substitution of Fe^3+ions of smaller ionic radii with Dy^3+ions of larger ionic radii that will strengthen the super exchange interactions among *** calculated squareness ratios are found to be much less than 0.5,due to the effect of spin disorder in the surface regions of NiDyxFe(2-x)O4(0.01≤x≤0.10)*** Dy^3+ions substitution increases the magnetic hardness(higher values of remanence Mr,coercivity Hc,and magnetic moment nB)of nickel nanoferrite samples.

关键词： NiFe2O4 Dy substitution Structure Magnetic properties Super exchange interactions Rare earths