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World Journal of Gastroenterology 2007年第8期13卷 1243-1246页

作者： mer yilmaz Hakan Dursun Nesrin Gürsan ibrahim Pirim Arif yilmaz Nihat Okcu Department of Gastroenterology Faculty of Medicine University of Atatürk Erzurum 25070 Turkey Department of Pathology Faculty of Medicine University of Atatürk Erzurum 25070 Turkey Department of Medical Biology and Genetics Faculty of Medicine University of Atatürk Erzurum 25070 Turkey

AIM： To investigate the relationship between myeloperoxidase polymorphisms as a host-related factor and atrophy caused by H pylori. METHODS： Our study enrolled 77 patients. Biopsy materials obtained during gastrointestinal endoscopies were evaluated for the presence of H pylori. Polymerase chain reaction-restriction fragment length polymorphism assay was used to characterize myeloperoxidase genothpes. RESuLTS： Forty four patients （57.1%） were lip （＋） and 33 （42.9%） were Hp （-）. Sixty six （85.7%） had GG genotype, 10 （12.9%） had GA genotype and 1 （1.29%） had AA genotype. The change in atrophy in relation to neutrophil infiltration was significant in Hp （＋） patients （P = 0.0001）. The change in atrophy in relation to neutrophil infiltration in patients with GG genotype was significant （P = 0.002）. However, the change in atrophy in relation to neutrophil infiltration was not significiant in patients with Hp （＋） GG genotype （r = 0.066, P = 0.63）. CONCLuSION： Myeloperoxidase genotype is critical for development of atrophy in relation to the severity of inflammation. However, it is interesting to note that, H pylori does not show any additive effect on development of atrophy.

关键词： Gastritis Gastroduodenal ulcer Gastric cancer Myeloperoxidase H pylori

Multi-Scale Attention-Based Deep Neural Network for Brain Disease Diagnosis

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Computers, Materials & Continua 2022年第9期72卷 4645-4661页

作者： Yin Liang Gaoxu Xu Sadaqat ur Rehman Faculty of Information Technology College of Computer Science and TechnologyBeijing Artificial Intelligence InstituteBeijing University of TechnologyBeijing100124China Department of Natural and Computing Science University of AberdeenAberdeenU.K

Whole brain functional connectivity(FC)patterns obtained from resting-state functional magnetic resonance imaging(rs-fMRI)have been widely used in the diagnosis of brain disorders such as autism spectrum disorder(ASD).Recently,an increasing number of studies have focused on employing deep learning techniques to analyze FC patterns for brain disease ***,the high dimensionality of the FC features and the interpretation of deep learning results are issues that need to be addressed in the FC-based brain disease *** this paper,we proposed a multi-scale attention-based deep neural network(MSA-DNN)model to classify FC patterns for the ASD *** model was implemented by adding a flexible multi-scale attention(MSA)module to the auto-encoder based backbone DNN,which can extract multi-scale features of the FC patterns and change the level of attention for different FCs by continuous *** model will reinforce the weights of important FC features while suppress the unimportant FCs to ensure the sparsity of the model weights and enhance the model *** performed systematic experiments on the large multi-sites ASD dataset with both ten-fold and leaveone-site-out *** showed that our model outperformed classical methods in brain disease classification and revealed robust intersite prediction *** also localized important FC features and brain regions associated with ASD ***,our study further promotes the biomarker detection and computer-aided classification for ASD diagnosis,and the proposed MSA module is flexible and easy to implement in other classification networks.

关键词： Autism spectrum disorder diagnosis resting-state fMRI deep neural network functional connectivity multi-scale attention module

DFT studies of thermoelectric properties of R-Au intermetallics at 300 K

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Journal of Rare Earths 2018年第2期36卷 197-202页

作者： Sardar Ahmad Rashid Ahmad Muhammad Bilal Najeeb ur Rehman Center for Computational Materials Science University of Malakand Department of Chemistry University of Malakand Department of Physics University of Malakand

Thermoelectric and electronic properties of cubic bi-intermetallics R-Au（R = Tb, Ho. Er. Tm and Yb）compounds were explored. Electronic properties i.e. density of states and band structure were computed using first principles calculations which proved the metallic nature of these compounds. Post-DFT（BoltzTraP） calculations were carried out to explore their thermoelectric properties like electrical conductivities. Seebeck coefficient, electronic thermal conductivities and figure of merit. The highest Seebeck coefficient and figure of merit were found for YbAu among these compounds which are 105 μV/K and 0.285 respectively. All the calculations were carried out at 300 K. Large values of figure of merit obtained for these compounds at room temperature indicate that these materials can be used for thermoelectric devices however need experimental verification.

关键词： DFT Seebeck coefficient Figure of merit Thermal conductivity Electrical conductivity R-Au

Investigation of Even-Even Ru Isotopes in Interacting Boson Model-2

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Communications in Theoretical Physics 2006年第4X期46卷 697-703页

作者： A.H. yilmaz M. Kuruoglu Department of Physics Karadeniz Technical University Trabzon 61080 ~hrkey

The interacting boson model of Arima, Iachello, and co-workers is applied to the even ruthenium isotopes, ^96 Ru -116Ru. Excitation energies, electromagnetic transition strengths, quadrupole and magnetic dipole moments, and △（E2/M1） mixing ratios have been described systematically. Mixed symmetry states are investigated. It is seen that the properties of low-lying levels in these isotopes, for which the comparison between experiment and theory is possible, can be satisfactorily characterized by the Interacting Boson Model-2.

关键词： nuclear structure ^96Ru- ^116Ru energy levels interacting boson model-2

Enhancement of pacemaker induced stochastic resonance by an autapse in a scale-free neuronal network

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Science China(Technological Sciences) 2016年第3期59卷 364-370页

作者： yilmaz Ergin BAYSAL Veli PERC Matjaz OZER Mahmut epartment of Biomedical Engineering Engineering Faculty bülent Ecevit University Zonguldak 67100 Turkey Department of Physics Faculty of Sciences King Abdulaziz University Jeddah 21431 Saudi Arabia Faculty of Natural Sciences and Mathematics University of Maribor Korogka cesta 160 Maribor SI-2000 Slovenia Department of Electrical and Electronics Engineering Engineering Faculty bülent Ecevit University Zonguldak 67100 Tarkey

An autapse is an unusual synapse that occurs between the axon and the soma of the same neuron. Mathematically, it can be described as a self-delayed feedback loop that is defined by a specific time-delay and the so-called autaptic coupling strength. Recently, the role and function of autapses within the nervous system has been studied extensively. Here, we extend the scope of theoretical research by investigating the effects of an autapse on the transmission of a weak localized pacemaker activity in a scale-free neuronal network. Our results reveal that by mediating the spiking activity of the pacemaker neuron, an autapse increases the propagation of its rhythm across the whole network, if only the autaptic time delay and the autaptic coupling strength are properly adjusted. We show that the autapse-induced enhancement of the transmission of pacemaker activity occurs only when the autaptic time delay is close to an integer multiple of the intrinsic oscillation time of the neurons that form the network. In particular, we demonstrate the emergence of multiple resonances involving the weak signal, the intrinsic oscillations, and the time scale that is dictated by the autapse. Interestingly, we also show that the enhancement of the pacemaker rhythm across the network is the strongest if the degree of the pacemaker neuron is lowest. This is because the dissipation of the localized rhythm is contained to the few directly linked neurons, and only afterwards, through the secondary neurons, it propagates further. If the pacemaker neuron has a high degree, then its rhythm is simply too weak to excite all the neighboring neurons, and propagation therefore fails.

关键词： autapse self-delayed feedback neuron channel noise scale-free network

△_(h)-GOuLD-HOPPER APPELL POLYNOMIALS

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Acta Mathematica Scientia 2021年第4期41卷 1196-1222页

作者： Mehmet Ali ÖZARSLAN Banu yilmaz YASAR Department of Mathematics Eastern Mediterranean UniversityFamagustaNorth Cyprus via Mersin 10Turkey

In this paper,we introduce the △_(h)-Gould-Hopper Appell polynomials An(x,y;h)via h-Gould-Hopper polynomials G_(n)^(h)(x,y).These polynomials reduces to △_(h)-Appell polynomials in the case y=0,△-Appell polynomials in the case y=0 and h=2D-Appell polynomials in the case h→0,2D △-Appell polynomials in the case h=1 and Appell polynomials in the case h→0 and y=*** obtain some well known main properties and an explicit form,determinant representation,recurrence relation,shift operators,difference equation,integro-difFerence equation and partial difference equation satisfied by *** satisfied by △_(h)-Gould-Hopper Appell polynomials reduce to determinant of all subclass of the usual ***,shift operators and difference equation satisfied by these polynomials reduce to recurrence,shift operators and difference equation of △_(h)-Appell polynomials,△-Appell polynomials;recurrence,shift operators,differential and integro-differential equation of 2D-Appell polynomials,recurrence,shift operators,integrodifference equation of 2D △-Appell polynomials,recurrence,shift operators,differential equation of Appell polynomials in the corresponding *** the special cases of the determining functions,we present the explicit forms,determinants,recurrences,difference equations satisfied by the degenerate Gould-Hopper Carlitz Bernoulli polynomials,degenerate Gould-Hopper Carlitz Euler polynomials,degenerate Gould-Hopper Genocchi polynomials,△_(h)-Gould-Hopper Boole polynomials and △_(h)-Gould-Hopper Bernoulli polynomials of the second *** particular cases of the degenerate Gould-Hopper Carlitz Bernoulli polynomials,degenerate Gould-Hopper Genocchi polynomials,△_(h)-Gould-Hopper Boole polynomials and △_(h)-Gould-Hopper Bernoulli polynomials of the second kind,corresponding determinants,recurrences,shift operators and difference equations reduce to all subclass of degenerate so-called families except for Genocchi polynomials recurrence,shift operators,an

关键词： △_(h)-Appell polynomials determinant recurrence difference equation

Facile synthesis of samarium and cerium doped double perovskite cobaltite with enhanced dielectric response

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Journal of Rare Earths 2024年第7期42卷 1317-1327,I0005页

作者： Yasir Abbas M.Kamran M.Anis-ur-Rehman Applied Thermal Physics Laboratory Department of PhysicsCOMSATS University IslamabadIslamabad 45550Pakistan

The investigation of Sm-Ce doping on structure,conduction,and dielectric response of Bi_(2)Ca_(2-2x)Sm_(x)CexCoO_(6)(x=0.000,0.025,0.050,0.075)(BCSCCO)are *** the specimens were synthesized by a facile synthesis technique named the co-precipitation route.X-ray diffraction(XRD)reveals that BCSCCO crystallizes into one phase with space group P21/*** crystallite size,dislocation density,lattice parameters,lattice strain,unit cell volume,and bulk density were determined using XRD *** structural properties of Bi_(2)Ca_(2)CoO_(6)were examined using calculations based on the density functional *** and experimental values discrepancy is less than 1%.A scanning electron microscope was used for performing a microstructural *** SEM images demonstrate the homogeneous distribution of grains with a range of sizes(0.054-0.090μm).The alternating current(ac)conductivity,dielectric permittivity,and tangent loss were also studied as a function of frequency(20 Hz-3 MHz)at different temperatures(100-500℃).All synthesized samples were examined using non-linear Debye's function to determine their spreading factor and relaxation *** specimen with the lowest crystallite size(∼23 nm)exhibits a high dielectric permittivity(∼3.80×10^(6)).The conduction mechanism was examined in the studied samples with the use of Jonscher's power *** power law indicates that the BCSCCO(x=0.000,0.025)follows correlated barrier hopping,whereas the x=0.050 and 0.075 compositions follow non-overlapping polaron *** studied specimen Bi_(2)Ca_(1.9)0Sm_(0.05)0Ce_(0.05)_(0)CoO_(6)with the highest density(∼5.65 g/cm^(3))displays a high electrical conductivity(∼46.1 S/cm).These findings correspond to those published for ceramics made from calcium cobaltite using solid-state reactions(5.0-26.0 S/cm).

关键词： Bismuth calcium samarium cerium cobaltite (BCSCCO) Spreading factor Conduction mechanism Rare earths

INTERACTION OF POLYVINYLPYRROLIDONE WITH METAL CHLORIDE AQuEOuS SOLuTIONS

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Chinese Journal of Polymer Science 2004年第6期22卷 581-584页

作者： Mohammad Saleem Khan Khaista Gul Najeeb ur Rehman National Center of Excellence in Physical Chemistry University of Peshawar Peshawar 25120 PakistanNational Center of Excellence in Physical Chemistry University of Peshawar Peshawar 25120 PakistanNational Center of Excellence in Physical Chemistry University of Peshawar Peshawar 25120 Pakistan

Interactions of polyvinylpyrrolidone (PVP) with metal chlorides (MgCl 2 , CaCl 2 , KCl and BaCl 2 ) have been investigated by viscometric and spectrophotometric techniques in aqueous solutions. Intrinsic viscosity [η] of (PVP) has shown a discontinuity with varying concentration of metal chlorides. The decreasing order of effectiveness of cation is K 1+ > Ca 2+ > Mg 2+ > Ba 2+ for poly(vinylpyrrolidone) solution. Changes in the absorption spectra of the cosolutes were observed in the presence of PVP in the lower limit of the uV-visible region i.e. 200-210 nm. These changes were attributed to interaction of PVP molecules with the cosolute molecules. As the concentration of the cosolute increased, a red shift in the peaks was observed, indicating an increase in interaction between PVP and cosolutes.

关键词： Polyvinylpyrrolidone PVP Metal chlorides Interaction Intrinsic Viscosity

An Epidemiologic Analysis of Vulvovaginal Candidiasis and Antifungal Susceptibilities

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Infectious Microbes & Diseases 2022年第3期4卷 131-136页

作者： Fadile Gaye Hösükoğlu Fahriye Ekşi Mehmet Erinmez Mete Gürol uğur Department of Medical Microbiology Gaziantep University School of MedicineGaziantepTurkey Department of Obstetrics and Gynecology Gaziantep University School of MedicineGaziantepTurkey

Inflammation of the vagina and vulva caused by Candida is called vulvovaginal candidiasis(VVC).Risk factors for VVC include pregnancy,diabetes mellitus,frequent oral sexual intercourse,and the use of tight synthetic underwear and systemic *** albicans,which belongs to the normal flora of the vagina,is the most common cause of ***,an increase in VVC episodes caused by non-albicans Candida species,including Candida glabrata,Candida tropicalis,Candida krusei and Candida parapsilosis,has been *** this study,a total of 100 Candida isolates obtained from patients with vaginitis symptoms were *** susceptibility of the Candida strains to amphotericin B,itraconazole,fluconazole,ketoconazole,voriconazole and caspofungin was investigated using the reference broth microdilution *** factors and demographic characteristics of the patients and the identified Candida species were also *** the 100 Candida strains isolated from vaginal samples,47(47%)were ***,43(43%)***,5(5%)***,2(2%)***,2(2%)*** and 1(1%)was Candida *** incidences of Candida susceptibility to caspofungin,fluconazole,itraconazole,voriconazole,ketoconazole and amphotericin B were 75%,35%,27%,80%,97%and 100%,***,there was a significant difference in antifungal susceptibility among patients belonging to certain risk groups,such as patients previously using antibiotics and recurrent *** of non-albicans Candida species and antifungal resistance,especially against azoles,are both increasing,and certain risk factors should be monitored strictly.

关键词： Candida antifungal vulvovaginal candidiasis fluconazole

Effect of slab width on choice of appropriate casting speed in steel production

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Journal of Iron and Steel Research International 2022年第1期29卷 71-79页

作者： Daniel Christopher Merten Marc-Thorsten Hütt yilmaz uygun Department of Mathematics and Logistics Jacobs University BremenBremen 28759Germany Department of Life Sciences and Chemistry Jacobs University BremenBremen 28759Germany

In steel continuous casting(CC),the choice of the appropriate speed at which the slab is cast can be influenced by many different factors and *** the slab thickness seems to have the biggest impact,other features like the slab width have been consistently *** fact,the slab width practically limits the casting speed via the mass flow constraint which governs the input and output balance at the ***,we present a case study that aims at analyzing steel production data from the perspective of casting speed *** studying the speed fluctuations of an industrial CC machine,we identify a strategic regime change toward a stricter consideration of the mass flow *** regime change manifests itself in a significant increase in the correlation between the actual casting speed and the maximal speed associated with the mass flow *** the surface,taking greater account of the input and output balance at the tundish has reduced the productivity of the continuous caster;however,one can argue that the lessened yield is compensated by a diminished risk of eventual slab *** the perspective of this trade-off,we establish a visualization technique that enables us to pinpoint the boundary beyond which one strategic regime becomes economically more advantageous than the other.

关键词： Continuous casting Casting speed Slab width Slab thickness Mass flow constraint Machine length constraint