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Manakov model of coupled NLS equation and its optical soliton solutions

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Journal of Ocean Engineering and Science 2024年第4期9卷 364-372页

作者： Esra unal Yilmaz Farid Samsami Khodad Yesim Saglam Ozkan Reza Abazari A.E.Abouelregal Mayssam Tarighi Shaayesteh Hadi Rezazadeh Hijaz Ahmad Department of Mathematics Bolu Abant Izzet Baysal UniversityBoluTurkey Faculty of Engineering Technology Amol University of Special Modern TechnologiesAmolIran Department of Mathematics Bursa Uludag UniversityBursaTurkey Department of Mathematics and Applications University of Mohaghegh ArdabiliArdabilIran Department of Mathematics College of Science and ArtsAl-QurayatJouf UniversitySaudi Arabia Basic Sciences Research Unit Jouf UniversitySaudi Arabia Amir Kabir University TehranIran Mathematics in Applied Sciences and Engineering Research Group Scientific Research CenterAl-Ayen UniversityNasiriyah 64001Iraq Section of Mathematics International Telematic University UninettunoCorso Vittorio Emanuele II39Roma 00186Italy

In the field of maritime transport,motion and energy,the dynamics of deep-sea waves is one of the major problems in ocean science.A mathematical modeling of dynamics of solitary waves in deep sea under the two-layer stratification leads to NLS equation,and consequently,the interaction two of them can be formulated by coupled NLS *** this work,extended auxiliary equation and the exp(−ω(χ))-expansion methods are employed to make the optical solutions of the Manakov model of coupled NLS *** methods used in this paper,in addition to providing the analysis of individual wave solutions,also provide general optical *** previously known solutions can be obtained by some special selections of parameters obtained by solving systems of algebraic *** this stage,it is more practical and convenient to apply methods with a symbolic calculation system.

关键词： Manakov model Extended auxiliary equation method Optical solutions Solitons

Deep neck infections mortal complications:Intrathoracic complications and necrotising fasciitis

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World Journal of Clinical Cases 2024年第30期12卷 6383-6390页

作者： Kemal Koray Bal Can Aslan Harun Gür Seda Turk Bal Recep Okan Ustun Murat unal Department of Otorhinolaryngology Mersin UniversityMersin 33160Türkiye Department of Emergency Medicine Tarsus State HospitalMersin 33460Türkiye Department of Aestetic Division of Plastic and Reconstructive SurgeryUniversity of Health Sciences Mersin City HospitalMersin 33230Türkiye

BACKGROUND We planned this study considering that complications of deep neck infections can be seriously life *** To raise awareness that introthoracic complications and necrotizing fasciitis are causes of serious mortality and *** This study was carried out with the participation of 188 patients who were treated at Mersin University Department of Otorhinolaryngology and Head and Neck Surgery at January 1,*** the patient files were retrospectively examined,16 of 188 patients(8.5%)were included in the study because they were observed to have necrotizing fasciitis and/or intrathoracic *** There were a total of 16 patients in this study,9 males(56.25%)and 7 females(43.75%).All patients were adults(>18 years)and the mean age was 50.37 years±15.37 *** patients had a mean age of 40.42 years±13.38 years,whereas for male patients was 58.11 years±12.44 *** Patients with necrotizing fasciitis and/or intrathoracic complications require more complicated and serious surgeries,intensive care unit monitoring,and mechanical ventilator *** rates of morbidity and mortality should be expected in Bal KK et *** neck infections mortal complications WJCC https://*** 6384 October 26,2024 Volume 12 Issue 30 these patients who are hospitalized for longer periods of time.

关键词： Deep neck infection Necrotising fasciitis Mediastinitis Complications Mortality

Is there an association between Helicobacter pylori in the inlet patch and globus sensation?

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World Journal of Gastroenterology 2010年第1期16卷 42-47页

作者： Hakan Alagozlu Zahide Simsek Selahattin unal Mehmet Cindoruk Sukru Dumlu ayse Dursun Division of Gastroenterology Department of Internal MedicineFaculty of MedicineGazi University Hospital Department of Pathology Faculty of MedicineGazi University Hospital

AIM:To determine the association between Helicobacter pylori(***)and globus sensation(GS)in the patients with cervical inlet patch. METHODS:Sixty-eight patients with esophageal inlet patches were identified from 6760 consecutive patients undergoing upper gastrointestinal endoscopy *** these 68 patients with cervical inlet patches, symptoms of globus sensation(lump in the throat), hoarseness,sore throat,frequent clearing of the throat,cough,dysphagia,odynophagia of at least 3 mo duration was questioned prior to endoscopy. RESULTS:Cervical heterotopic gastric mucosa(CHGM) was found in 68 of 6760 *** endoscopic prevalence of CHGM was determined to be 1%.*** was identified in 16(23.5%)of 68 patients with inlet patch.53 patients were classified as CHGMⅡ.This group included 48 patients with globus sensation,4 patients with chronic cough and 1 patient with *** the patients who were ***(+)in cervical inlet patches had globus ***:Often patients with CHGM have a long history of troublesome throat *** speculate that disturbances in globus sensation are like non-ulcer dyspepsia.

关键词： Barrett’s esophagus Cervical heterotopic gastric mucosa Globus sensation Helicobacter pylori Inlet patch

Prognostic significance of tumor budding,desmoplastic reaction,and lymphocytic infiltration in patients with gastric adenocarcinoma

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World Journal of Gastrointestinal Pathophysiology 2024年第1期15卷 9-25页

作者： aysen Yavuz Kubra Simsek Anil Alpsoy Busra Altunay Elif Ocak Gedik Betul unal Cumhur Ibrahim Bassorgun Ali Murat Tatli Gulsum Ozlem Elpek Department of Pathology Akdeniz University Medical SchoolAntalya 07070Türkiye Department of Medical Oncology Akdeniz University Medical SchoolAntalya 07070Türkiye

BACKGROUND Recent studies have shown that the tumor microenvironment significantly influences the behavior of solid *** this context,Accumulated data suggests that pathological evaluation of tumor budding(TB),desmoplastic reaction(DR),and tumor-infiltrating lymphocytes(TILs)may be crucial in determining tumor behavior in the gastrointestinal *** gastric adenocarcinoma(GAC),although some results suggest that TB and TILs may be effective in determining the course of the disease,the data do not ***,very few studies have investigated the relationship between DR and *** present,the associations between tumor TB,DR and TILs in GAC patients have not been *** To establish the relationships between TB,DR,and TILs in patients with GAC and to assess their influence on *** Our study group comprised 130 patients diagnosed with *** definition of TB was established based on the International TB Consensus *** DR was categorized into three groups according to the level of tumor stroma *** assessment of TILs was conducted using a semiquantitative approach,employing a cutoff value of 5%.The statistical analysis of the whole group and 100 patients with an intestinal subtype of GAC was performed using SPSS version *** A significant correlation between peritumoral budding(PTB)and intratumoral budding(ITB)was noted(r=0.943).Tumors with high PTBs and ITBs had a greater incidence of immature DRs and low TILs(P<0.01).PTB and ITB were associated with histological subtype,lymph node metastasis(LNM),and stage(P<0.01).ITB,PTB,LNM,DR,and stage were significant risk factors associated with poor *** multivariate Cox regression analysis identified ITB,PTB,and LNM as independent prognostic variables(P<0.05).In intestinal-type adenocarcinomas,a positive correlation between PTB and ITB was noted(r=0.972).While univariate analysis revealed that LNM,stage,PTB,ITB,and DR were strong parameters for pred

关键词： Gastric cancer Tumor budding Desmoplastic stroma Tumor-infiltrating lymphocytes Prognosis

Synthesis, characterization and radioluminescence properties of erbium-doped yttria phosphors

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International Journal of Minerals,Metallurgy and Materials 2021年第12期28卷 1983-1990页

作者： Fatma unal Faruk Kaya Kursat Kazmanli Metallurgical and Materials Engineering Department Hitit UniversityCorum 19030Turkey Metallurgical and Materials Engineering Department Istanbul Technical UniversityMaslakIstanbul 34469Turkey

Radioluminescence(RL)behaviour of erbium-doped yttria nanoparticles(Y2O_(3):Er^(3+)NPs)which were produced by sol-gel method was reported for future scintillator *** with dopant rates of 1 at%,5 at%,10 at%and 20 at%Er were produced and calcined at 800℃,and effect of increased calcination temperature(1100℃)on the RL behaviour was also reported.X-ray diffraction(XRD)results showed that all phosphors had the cubic Y2O_(3) bixbyite-type *** lattice parameters,crystallite sizes(CS),and lattice strain values were calculated by Cohen-Wagner(C-W)and Williamson-Hall(W-H)methods,***,the optimum solubility value of the Er^(3+)dopant ion in the Y2O_(3) host lattice was calculated to be approximately 4 at%according to Vegard’s law,which was experimentally obtained from the 5 at%Er^(3+)ion containing *** peak shifts in XRD patterns and X-ray photoelectron spectroscopy(XPS)analyses confirmed that Er^(3+)dopant ions were successfully incorporated into the Y2O_(3) host ***-resolution transmission electron microscopy(HRTEM)results verified the average CS values and agglomerated NPs morphologies were *** electron microscopy(SEM)results showed the neck formation between the particles due to increased calcination *** a result of the RL measurements under a Cu KαX-ray radiation(wavelength,λ=0.154 nm)source with 50 kV and 10 mA beam current,it was determined that the highest RL emission belonged to 5 at%Er doped *** the RL emission spectrum,the emission peaks were observed in the wavelength ranges of 510-575 nm(2H11/2,4S3/2-4I15/2;green emission)and 645-690 nm(4F9/2-4I15/2;red emission).The emission peaks at 581,583,587,593,601,611 and 632 nm wavelengths were also *** was found that both dopant rate and calcination temperature affected the RL emission *** color shifted from red to green with increasing calcination temperature which was attributed to the increased crystallinit

关键词： structure. temperature. solution.

Comprehensive analysis of pulsed plasma nitriding preconditions on the fatigue behavior of AISI 304 austenitic stainless steel

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International Journal of Minerals,Metallurgy and Materials 2021年第4期28卷 657-664页

作者： Okan unal Erfan Maleki Remzi Varol Mechanical Engineering Department Karabuk UniversityKarabuk 78050Turkey Modern Surface Engineering Laboratory(MSELAB) Karabuk UniversityKarabuk 78050Turkey Mechanical Engineering Department Sharif University of Technology-International CampusKish Island 79417-76655Iran Mechanical Engineering Department Suleyman Demirel UniversityIsparta 32200Turkey

This study aims to draw an exact boundary for microstructural and mechanical behaviors in terms of pulsed plasma nitriding *** pulsed plasma nitriding treatment was applied to AISI 304 austenitic stainless steel at different temperatures and *** reveal that nitriding depth increased as process temperature and duration *** nitriding depth remarkably increased at 475℃for 8 h and at 550℃for 4 *** austenite structure was transformed into a metastable nitrogen-oversaturated body-centered tetragonal expanded austenite(S-phase)during low-temperature plasma *** S-phase was converted to CrN precipitation at 475℃for 8 h and at 550℃for 4 *** hardness and fatigue limit increased through plasma nitriding regardless of process *** best surface hardness and fatigue limit were obtained at 550℃for 4 h because of the occurrence of CrN precipitation.

关键词： pulsed plasma nitriding S-phase fatigue nitrided layer

Effect of surfactant on the dielectric and electrorheological properties of zinc borate/silicone oil dispersions

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International Journal of Minerals,Metallurgy and Materials 2019年第12期26卷 1523-1530页

作者： Omer Yunus Gumus Halil Ibrahim unal Bursa Technical University Engineering and Natural Sciences FacultyFiber and Polymer Engineering DepartmentBursa 16310Turkey Gazi University Science FacultyChemistry DepartmentSmart Materials Research Lab.Ankara 06500Turkey

Zinc borate(ZB)particles dispersed in silicone oil(SO)at concentrations of φ=5vol%-20vol% were subjected to dielectric analysis to elucidate their polarization strength,time,and *** revealed that all virgin dispersions lacked *** X-100,a non-ionic surfactant,was added to ZB/SO dispersions to enhance the polarizability of ZB *** addition of 1vol% Triton X-100 enhanced the polarizability of ZB/SO dispersions,and the 15vol% ZB/SO system provided the highest dielectric difference Δε′(the difference in ε′values at zero and infinite frequency,Δε′=ε0–ε∝)of *** electrorheological(ER)activities of the ZB/SO/Triton-X dispersion system were determined through the ER response test,and viscoelastic behaviors were investigated via oscillation tests.A recoverable deformation of 36% under an applied electrical field strength of 1.5 kV/mm was detected through creep and creep recovery tests.

关键词： zinc borate electrorheological fluids dielectric analysis surfactant

Dielectric and microstructural properties of YAG:Dy^(3+) ceramics

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Journal of Rare Earths 2018年第12期36卷 1310-1318页

作者： Munirah Abdullah Almessiere Bayram unal Abdulhadi Baykal Department of Physics College of Science Imam Abdulrahman Bin Faisal University Department of Nanomedicine Research Institute for Research & Medical Consultations (IRMC) Imam Abdulrahman Bin Faisal University Department of Software and Computer Engineering Istanbul Sabahattin Zaim University

Yttrium aluminium garnet(Y3Al5O12:YAG) singly doped with Dy3+ at different concentrations was prepared by solid state reactions using repeated heating cycles over the temperature range of 1300-1600 ℃. X-ray powder diffraction analysis confirms the presence of a well-crystallized YAG perovskite phase with cubic structure(by Rietveld refinement). The rare earth dopant is successfully integrated into the YAG host lattice without any major changes in the original structure. The temperature dependence,up to 250 ℃, of the conductivity, dielectric constant, dielectric loss, and loss tangent, at various frequencies of up to 5.0 MHz for undoped and doped crystals is compared to understand the electrical and structural characteristics. The experimental results reveal that Dy3+ dopants in YAG crystal significantly influence the conductivity, dielectric constant, and lossy mechanisms, which is probably due to the 3 d-AI ions and 4 f-Dy ions incorporated at different positions of both tetrahedral and octahedral symmetries in YAG:xDy3+ ceramics.

关键词： Yttrium aluminium garnet(YAG) X-ray diffraction(XRD) Conductivity Dielectric properties Rare earths

Improved population mean estimator with exponential function under non-response

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Applied Mathematics(A Journal of Chinese Universities) 2023年第4期38卷 562-580页

作者： Cerenunal Cem Kadilar Department of Statistics Hacettepe UniversityAnkara 06800Turkey

In this article,we consider a new family of exponential type estimators for estimating the unknown population mean of the study *** propose estimators taking advantage of the auxiliary variable information under the first and second non-response cases *** required theoretical comparisons are obtained and the numerical studies are *** conclusion,the results show that the proposed family of estimators is the most efficient estimator with respect to the estimators in literature under the obtained conditions for both cases.

关键词： non-response exponential estimators sub-sampling method population mean