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Chinese Physics B 2018年第2期27卷 234-238页

作者： M Eshghi r sever S M Ikhdair Young researchers and Elite Club Central Tehran Branch Islamic Azad University Department of Physics Middle East Technical University Department of Physics Faculty of Science An-Najah National University Department of Electrical Engineering Near East University

We need to solve a suitable exponential form of the position-dependent mass （PDM） Schr6dinger equation with a charged particle placed in the Hulthen plus Coulomb-like potential field and under the actions of the external magnetic and Aharonov-Bohm （AB） flux fields. The bound state energies and their corresponding wave functions are calculated for the spatially-dependent mass distribution function of interest in physics. A few plots of some numerical results with respect to the energy are shown.

关键词： Schr6dinger equation Hulthen plus Coulomb-like potential position-dependent mass distributionfunctions perpendicular magnetic and Aharonov-Bohm flux fields

Superstatistics of Modified rosen-Morse Potential with Dirac Delta and Uniform Distributions

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Communications in Theoretical Physics 2019年第10期71卷 1246-1252页

作者： U.S.Okorie A.N.Ikot G.J.rampho r.sever Department of Physics AkwaIbom State UniversityIkotAkpadenUyo.Nigeria Department of Physics University of Port HarcourtChobaNigeria Department of Physics University of South AfricaFlorida Park1710South Africa Department of Physics Middle East Technical University06800AnkaraTurkey

We discuss the thermodynamic properties of a modified rosen-Morse potential using the q-deformed superstatistics approaches. We obtain the partition function with the help of the generalized Boltzmann factor from the modified Dirac delta distribution and uniform distribution. Other thermodynamic function is obtained for the superstatistics of the two distributions considered. We also discuss our results graphically and obtain the ordinary statistical quantities when the deformation parameter tends to zero.

关键词： superstatistics partition function thermodynamic function

What If I Told You Camouflage is a Myth? Animal Coloration is Mainly A-biotic and not Biotic (Camouflage)

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research in Ecology 2024年第1期6卷 14-27页

作者： Zvi sever Formerly Biology Department University of IndianapolisIndiana46227USA

In the present article,the author posits that the perception that animals apparently display a strategy of avoiding detection by means of camouflage—i.e.,by disguising themselves in the natural colours of their environment—is not the actual case in nature but,rather,merely *** coloration is mainly a-biotic(eco-physiological)and not biotic(camouflage).The contention regarding the absence of the phenomenon of camouflage among animals as a common evolutionary response is based on three arguments:(1)that reflecting the natural colours of the environment is linked to ecophysiology;(2)that predator and prey constitute“an evolutionary pair”and,accordingly,they know how to identify one another(in order to survive they employ different strategies,of which camouflage is not one of them);and (3)that the approach of relating animal camouflage to reflecting the colours of the environment is an anthropocentric *** than the accepted biotic-ethological approach(colour camouflage),the present article suggests the recognition of a-biotic and eco-physiological conditions as a distinct research field,whose title“reflection of environmental colours by animals”,along with this article,calls for eco-physiologists to demonstrate that this approach indeed offers a special contribution to the understanding of colouration in animals.

关键词： A-biotic Anthropocentrism Camouflage Eco-physiology Ethology Evolution reflection

Dynamics and cytokinic regulation of immune cell infiltration in genetically engineered mouse models of pancreatic cancer dictate the sensitivity to immunotherapy

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Cancer Communications 2024年第1期44卷 178-182页

作者： Okan Safak Shenghan Wang Carmen Mota reyes Ibrahim Halil Gürcinar Sergey Tokalov Nedim Can Cevik Kivanc Görgülü Bengi Su Yilmaz Emre Erdogan Linhan Ye Qiaolin Li Elif Arik sever SamedÖzer Güldal Süyen Helmut Friess Güralp Onur Ceyhan rouzanna Istvanffy Hana Algül Ihsan Ekin Demir Department of Surgery Klinikum rechts der IsarTechnical University of MunichSchool of MedicineMunichBavariaGermany Department of General Surgery HPB-UnitSchool of MedicineAcibadem Mehmet Ali Aydinlar UniversityIstanbulIstanbulTurkey Comprehensive Cancer Center München Klinikum rechts der IsarTechnical University of MunichSchool of MedicineMunichBavariaGermany Department of Hematology Oncology and Tumor ImmunologyCharitéUniversity Medicine BerlinCampus Virchow ClinicBerlinBerlinGermany Graduate School of Health Sciences Acibadem Mehmet Ali Aydinlar UniversityIstanbulIstanbulTurkey Department of Physiology Acibadem Mehmet Ali Aydinlar UniversityIstanbulIstanbulTurkey Else Kröner Clinician Scientist Professorship for Translational Pancreatic Surgery MunichGermany Neural Influences in Cancer(NIC)International research Consortium MunichGermany

Dear Editor,Targeting the immune compartment in pancreatic duc-tal adenocarcinoma(PDAC)holds promise for prognostic improvement,yet our knowledge on the spatial and tem-poral dynamics and the molecular modulators of t... 详细信息

关键词： immune adenocarcinoma immunotherapy

response of photosynthesis,growth,and acorn mass of pedunculate oak to diff erent levels of nitrogen in wet and dry growing seasons

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Journal of Forestry research 2023年第1期34卷 167-176页

作者： Krunoslav sever Saša Bogdan ŽeljkoŠkvorc Faculty of Forestry and Wood Technology University of ZagrebSvetošimunska 2510000 ZagrebCroatia

The objective was to examine the effects of optimal leaf nitrogen levels>2.0%and suboptimal levels<2.0%,nitrogen nutrition on net photo synthetic rate,stem diameter increment,height growth increment and acorn mass of ... 详细信息

The objective was to examine the effects of optimal leaf nitrogen levels>2.0%and suboptimal levelsrogen nutrition on net photo synthetic rate,stem diameter increment,height growth increment and acorn mass of pedunculate oak during 2010 in the absence of drought stress and during 2011 under the impact of moderate drought *** to the results,moderate drought stress significantly reduced net photo synthetic rate,stem diameter increment and height growth increment,while acorn mass was not *** nitrogen nutrition significantly reduced the net photo synthetic rate and stem diameter increment only in the wet year,acorn mass in both wet and dry years,while height growth increment was not significantly reduced by suboptimal nitrogen nutrition in either *** results indicate that optimal nitrogen levels can stimulate photo synthetic rate and stem diameter increment of pedunculate oak only in the absence of moderate drought ***,the results show that moderate drought stress is a more dominant stressor for photosynthesis and growth of pedunculate oak than suboptimal nitrogen nutrition,while for acorn development,it is the more dominant stressor.

关键词： Quercus robur L. Drought stress Net photosynthic rate Stem diameter increment Height growth increment Acorn mass

Effective Mass SchrSdinger Equation via Point Canonical Transformation

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Chinese Physics Letters 2010年第7期27卷 28-31页

作者： Altug Arda ramazan sever Department of Physics Education Hacettepe University Ankara 06800 Turkey Department of Physics Middle East Technical University Ankara 06531 Turkey

Exact solutions of the effective radial Schrodinger equation are obtained for some inverse potentials by using the point canonical transformation. The energy eigenvalues and the corresponding wave functions are calcul... 详细信息

关键词： Uses Transformation

Exact Solutions of Effective Mass Dirac Equation with Non-PT-Symmetric and Non-Hermitian Exponential-type Potentials

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Chinese Physics Letters 2009年第9期26卷 25-28页

作者： Altug Ardat ramazan sever Department of Physics Education Hacettepe University 06800 Ankara Turkey Department of Physics Middle East Technical University 06800 Ankara Turkey

By using a two-component approach to the one-dimensional effective mass Dirac equation, bound states are investigated under the effect of two new non-PT-symmetric and non-Hermitian exponential type potentials. It is observed that the Dirac equation can be mapped into a Schrodinger-like equation by rescaling one of the two Dirac wave functions in the case of the position-dependent mass. The energy levels and the corresponding Dirae eigenfunctions are found analytically.

关键词： sea surface nonliear interaction numerical method

Studies on Thermal Contraction of Crankshaft Bearings under Extreme Low Temperatures

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Journal of Thermal Science 2015年第5期24卷 496-501页

作者： sever-Alexandru Haba Gheorghe Oancea Manufacturing Engineering Department Transilvania University of Brasov

This paper presents how the contractions of the main components of a V6 motor with low engine displacement are determined for the cold-start phase under extreme low temperature. Internal combustion engine components have complex geometries and to obtain the thermal contractions, in the research, used the method of finite element analysis. The phenomena of thermal contractions are studied for the cold-start situations at extreme low temperature, knowing that the cold-start phase of an internal combustion engine is the main factor that determines moving rotational and translational parts wear life. Checking the proper choice of clearance is particularly important, as the use of inappropriate values of it leads to rapid operation destruction of the engine group components. The results obtained for the thermal clearances of crankshaft bearings are mathematically modeled and the relations can be used for calculating the clearances. The mathematical models are also useful for implementing in different software tools.

关键词： Engine Engine block Crankshaft bearings Thermal contraction FEA

Approximate Solutions of Dirac Equation with Hyperbolic-Type Potential

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Communications in Theoretical Physics 2015年第9期64卷 269-273页

作者： Altug Arda ramazan sever Department of Physics Education Hacettepe University Department of Physics Middle East Technical University

The energy eigenvalues of a Dirac particle for the hyperbolic-type potential field have been computed approximately. It is obtained a transcendental function of energy, F(E), by writing in terms of confluent Heun *** numerical values of energy are then obtained by fixing the zeros on "E-axis" for both complex functions re[F(E)]and Im[F(E)].

关键词： hyperbolic-type potential Dirac equation approxima

Approximate solution to the time-dependent Kratzer plus screened Coulomb potential in the Feinberg–Horodecki equation

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Chinese Physics B 2020年第6期29卷 90-97页

作者： Mahmoud Farout ramazan sever Sameer MIkhdair Department of Physics An-Najah National UniversityNablusPalestine Department of Physics Middle East Technical UniversityAnkara 06531Turkey Department of Electrical Engineering Near East UniversityNicosiaNorthern CyprusMersin 10Turkey

We obtain the quantized momentum eigenvalues Pn together with space-like coherent eigenstates for the space-like counterpart of the Schr¨odinger equation,the Feinberg–Horodecki equation,with a combined Kratzer potential plus screened coulomb potential which is constructed by temporal counterpart of the spatial form of these *** present work is illustrated with two special cases of the general form:the time-dependent modified Kratzer potential and the time-dependent screened Coulomb potential.

关键词： quantized momentum states Feinberg-Horodecki equation the time-dependent screened Coulomb potential and time-dependent modified Kratzer potential