11 research outputs found
Advancement and Application of the Bezgin Method to Estimate Effects of Stiffness Variations along Railways on Wheel Forces
No full textThe need for an analytical method that one can apply manually to estimate dynamic impact forces on railway tracks that occur because of varying track stiffness or track profile initiated a study to develop an analytical method named as the Bezgin Method. The advancement of this method presented in this paper includes an extension of a set of equations developed and introduced by the first author earlier as the Bezgin Equations using the proposed method and development of a new equation. In addition to track stiffness taken into consideration in the equations introduced earlier, the Extended Bezgin Equations presented in this paper take into account bogie stiffness, wheel spring stiffness, Hertzian contact stiffness, and a factor for damping. The new equation takes into account the effect of vertical wheel acceleration as a train transitions to a stiffer structure or transitions along an ascending track profile. The paper unites and applies these equations to estimate wheel forces that develop along stiffness transition zones by considering an array of train speeds for an array of track stiffness ratios and representative values for track profile deviations along the transitions. Final section of the paper includes elaborate finite element analyses of structural track models that involve transitions of soil supported ballasted railway tracks with concrete based ballasted tracks along various transition lengths and compares their estimates for dynamic impact force factors with those estimated by the Extended Bezgin Equations. The paper concludes with a discussion of the potential uses, benefits, and the value of the Bezgin Method for railway engineering
Synthesis and characterization of a new poly(dithieno ( 3,2-b: 2 ', 3 '-d) pyrrole) derivative conjugated polymer: Its electrochromic and biosensing applications
No full textWOS:000418581800006Synthesis and electropolymerization of a new conjugated dithieno(3,2-b: 2',3'-d) pyrole (DTP) derivative, namely, 2-(2-(2-(4H-dithieno[3,2-b: 2',3'-d] pyrrol-4-yl) ethoxy) ethoxy) ethanamine, (DTP-alkoxy-NH2) monomer are presented. The electrochemical, spectroelectrochemical effects and biosensor capability towards to glucose oxidase enzyme of P(DTP-alkoxy-NH2) polymer film are investigated in detail during the placement of alkoxy-NH2 functional unit in the polymer. Electrochemical and optical results between neutral and oxidized states of the polymer film show that (P(DTP-alkoxy-NH2)) has reversibly multi-electrochromic behaviors. Furthermore, glucose oxidase enzyme (GOx) is covalently immobilized on Au electrodes modified with P(DTP-alkoxy-NH2) conducting polymer. This enzyme is entrapped into conducting polymer during electropolymerization of DTP monomer on the electrodes. Some characterization parameters (Maximum reaction rate, Michaelis-Menten constants, temperature, pH and operational stabilities) for this kind of biosensor application is also determined. (C) 2017 Elsevier Ltd. All rights reserved.Karamanoglu Mehmetbey UniversityKaramanoglu Mehmetbey University [06-M-15]The author gratefully acknowledges the financial support from Karamanoglu Mehmetbey University (Grant No: 06-M-15)
Kumarin içerikli polimerlerin sentezi spektroskopik ve dielektrik özellikleri / Synthesis of polymers containing coumarin spectroscopic and dielectric properties
No full textReview of the Monograph by V. B. Bezgin «The Daily Life of a Russian Peasant Women of the Late Empire Period»
No full textФедоров Сергей Георгиевич – доцент кафедры истории и документоведения, Курганский государственный университет (г. Курган), e-mail: [email protected]. ORCID: 0000-0003-0879-678X. Sergey G. Fedorov – associate professor of Department of History and Documentation, Kurgan State University (Kurgan), e-mail: [email protected]В рецензии представлены результаты осуществленного анализа и дана характеристика содержания монографии В. Б. Безгина, посвященной истории повседневной жизни русской крестьянки периода поздней империи. Отмечено, что это одно из первых научных исследований периода конца XIX – начала XX в., посвященных данной проблеме. Охарактеризована источниковая база монографии, раскрывается степень научной изученности темы, представленной автором. В монографии В. Б. Безгина изображена повседневность русской крестьянки на разных этапах ее жизни, описаны все стороны быта и крестьянской женской культуры. В рецензии подчеркивается, что В. Б. Безгин убедительно доказал влияние модернизационных процессов на русскую деревню не только в положительном плане, но и в отрицательном. Разрушение традиционных устоев общины, влияние города на деревню во многом изменили общественный статус крестьянки в семье и сельской общине. Поведение женщины стало более раскрепощенным и независимым, повысилось ее правосознание. Но под влиянием процессов модернизации также наблюдается рост преступлений, совершенных над женщинами. Растут девиации в поведении женщин и женская преступность в деревне. Отмечено стремление автора раскрыть природу семейного насилия и насильственных действий по отношению к крестьянке. В. Б. Безгин раскрыл роль и место женщины в крестьянской семье и сельском мире. The review provides the results of the analysis and the characteristics of the monograph devoted to the history of the daily life of the Russian peasant woman of the late Empire period. It is noted that this is one of the first scientific studies of the period of the late XIX – early XX century, devoted to this problem. The source database of the monograph is given, the degree of the scientific study of the topic presented by the author is revealed. The monograph by V. B. Bezgin
depicts the everyday life of a Russian peasant woman at different stages of her life, describes all aspects of everyday life and peasant women’s culture. It is emphasized that V. B. Bezgin has convincingly proved the impact of modernization processes on the Russian countryside not only positively but also negatively. The destruction of the traditional foundations of the community, the influence of the city on the village in many ways changed the social status of the peasant woman in the family and rural community. The woman’s behavior became more relaxed and independent, and her sense of justice increased. But under the influence of modernization processes, there is also an increase in crimes committed against women. Deviations in the behavior of women and female crime in the village are growing. V. B. Bezgin revealed the role and place of women in the peasant family and the rural world
Synthesis, characterization, and dielectric properties of polymers functionalized with coumarone and diethanolamine
No full textLYNCHING IN RUSSIAN COUNTRYSIDE (late XIX-early XX)
No full textResearch actuality is due to the frequent attempts of extrajudicial killings of criminals in the country as a result of the citizens' law enforcement distrust, their doubt of deserved retribution.Such phenomenon of legal life of the Russian countryside as a lynch mob is studied in the article on the basis of a wide range of archival and ethnographic sources. The author analyzes the crimes for which the perpetrators are arbitrarily subjected to massacre in the village. The role of the peasant community in the punishment implementation of criminals was found out. The causes of the stability of this tradition in rural society were set.Lynching played an effective means of suppression of unlawful acts of the peasants. The collective nature of the spontaneously created killings of criminals was the result of mutual responsibility of community members and rural solidarity preservation condition. According to farmers gathering verdict gave legal force to massacre and left no doubt about the justice of the decision.DOI: http://dx.doi.org/10.12731/2218-7405-2013-8-1</p
Study of absorption parameters around the K edge for selected compounds of Gd
No full textThe K shell absorption jump ratios, jump factors, effective atomic numbers, and electron densities were derived from the measured
total mass attenuation coefficient using an energy dispersive X-ray fluorescence spectrometer for Gd2O3, Gd2(CO3)3H2O,
Gd2(C2O4)3H2O, and Gd2(SO4)3 compounds. The total mass attenuation coefficients weremeasured in the X-ray energy range from
39.52 to 57.14 keV in a transmission geometry utilizing the Kα2, Kα1, Kβ1, and Kβ2 X-rays from different secondary source targets
excited by the 59.54-keV photons from an Am-241 annular source and detected by a Si(Li) detector with a resolution of 160 eV at
5.9 keV. The energy gap, ionization energy, electron affinity, and global electrophilicity parameters of oxide, sulfate, oxalate, and
carbonate ions were calculated using density functional theory (B3LYP). The experimental results are discussed based on these
parameters.Atatürk University Research Fund under project no. 2011/82
Bitlis Eren University, Scientific and Technological Application and Research Cente
An investigation on electrochromic properties of new copolymers based on dithienylpyrrole and propylenedioxythiophene
No full textWOS:000418984300014In this research, the effect of ProDOT (3,4-propylenedioxythiophene) monomer on the electrochromic properties of dithienylpyrrole type copolymer has been studied. The copolymers of these two components have obtained by electroanalytical methods in different monomer ratios. The morphological, optical and electrochemical characterizations of all copolymers were investigated. The electrochromic properties of the novel films were investigated by cyclic voltammetry and spectroelectrochemical methods. Different colors of the electrochromic films were achieved under different applied potentials. The maximum difference of the UV-vis absorption of the film was found about 42% between -0.6 V and 1.2 Vat 850 nm for P(C3) copolymer with a fast switching time (0.4 s). The morphological and chemical analyses for copolymers were also detected.Karamanoglu Mehmetbey UniversityKaramanoglu Mehmetbey UniversityThe author gratefully acknowledges the financial support from Karamanoglu Mehmetbey University. Authors thanks to Dr. Arif Kivrak for his help during the synthesis of the molecules. The preliminary studies of this manuscript was presented at International Congress of the New Approaches and Technologies for Sustainable Development on September, 21-24, 2017 in Turkey
Synthesis of New Thienylene Pyrrole Monomers and Their Electropolymerizations
No full textIn this study, four new 2,5-dithienylpyrroles (SNS) 1-(3-fluoro-phenyl)-2,5-di(thiophen-2-yl)-1H-pyrrole (m-FPTP), 1-(3-chlorophenyl)-2,5-di(thiophen-2-yl)-1H-pyrrole (m-ClPTP), 1-(3-bromo-phenyl)-2,5-di(thiophen-2-yl)-1H-pyrrole (m-BrPTP) and 1-(4-bromo-phenyl)-2,5-di(thiophen-2-yl)-1H-pyrrole (p-BrPTP) containing meta and para substituted benzene ring at the nitrogen atom were synthesized via Paal-Knorr condensation of 1,4-di(2-thienyl)-1,4-butanedione with corresponding halo-substituted anilines. The monomers were polymerized via potential cycling in LiClO4-acetonitrile (ACN) electrolytic solution. The replacement effect of halogen atoms as a substituent from para-to meta-positions and different halogen units (F, Cl, Br) at only meta-/para-positions in the structure on the electrochemical and optical properties of synthesized monomers/polymers were investigated. Computational investigations (M06/TZVP) were also performed on the monomer structures to support the electrochemical behavior of the monomers and to get more insight about the conformation of the structures. Furthermore, the synthesized polymer films exhibited reversible redox behavior accompanied with a reversible electrochromic behavior. It was also observed that the optical contrast value (Delta T%) for polymers was significantly improved when compared with their analogs in the literature. (C) The Author(s) 2014. Published by ECS. All rights reserved
Comparing tau status determined via plasma pTau181, pTau231 and [18F]MK6240 tau-PET
No full textBackground: Tau in Alzheimer's disease (AD) is assessed via cerebrospinal fluid (CSF) and Positron emission tomography (PET). Novel methods to detect phosphorylated tau (pTau) in blood have been recently developed. We aim to investigate agreement of tau status as determined by [18F]MK6240 tau-PET, plasma pTau181 and pTau231. Methods: We assessed cognitively unimpaired young, cognitively unimpaired, mild cognitive impairment and AD individuals with [18F]MK6240, plasma pTau181, pTau 231, [18F]AZD4694 amyloid-PET and MRI. A subset underwent CSF assessment. We conducted ROC curves to obtain cut-off values for plasma pTau epitopes. Individuals were categorized as positive or negative in all biomarkers. We then compared the distribution among concordant and discordant groups in relation to diagnosis, Aβ status, APOEε4 status, [18F]AZD4694 global SUVR, hippocampal volume and CSF pTau181. Findings: The threshold for positivity was 15.085 pg/mL for plasma pTau181 and 17.652 pg/mL for plasma pTau231. Most individuals had concordant statuses, however, 18% of plasma181/PET, 26% of plasma231/PET and 25% of the pTau231/pTau181 were discordant. Positivity to at least one biomarker was often accompanied by diagnosis of cognitive impairment, Aβ positivity, APOEε4 carriership, higher levels of [18F]AZD4694 global SUVR, hippocampal atrophy and CSF pTau181. Interpretation: Plasma pTau181, pTau231 and [18F]MK6240 seem to reflect different stages of tau progression. Plasma biomarkers can be useful in the context of diagnostic information and clinical trials, to evaluate the disease stage. Moreover, they seem to confidently evaluate tau-PET positivity. Funding: Moreover, this study was supported by Weston Brain Institute, Canadian Institute of Health Research and Fonds de Recherche du Québec. © 2022 The Author
