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Unal C.,Bursa Orhangazi University | Eskidere O.,Bursa Orhangazi University | Tosun M.,Dumluplnar University
2015 Medical Technologies National Conference, TIPTEKNO 2015 | Year: 2015

The main subject in this study is to monitor the changes of EEG power spectrum during sevoflurane general anesthesia and to determine the variables which show meaningful changes for anesthetic depth. Sevoflurane has been suggested as a suitable agent for anesthetic induction. The data base was constructed of the records from a total of 25 patients. During the operation blood pressure, heart rate and sevoflurane agent ratio were recorded. Additionally, EEG recordings are taken continuously during the operation. The power spectral density values corresponding 1-50 Hz frequency interval of the selected EEG slices which has 10 seconds of time interval is used. Investigated EEG parameters show correlations with anesthetic depth in sevoflurane anesthesia. This study confirms EEG power spectrum as potantially useful measures of anesthetic depth in sevoflurane anesthesia. After the induction of sevoflurane, power spectrum of EEG is changed sharply. Total power and low frequency powers are increased sharply. But the beta and gamma band frequencies are decreased totally. © 2015 IEEE. Source


Parlak C.,Dumluplnar University | Tursun M.,Visvesvaraya Technological University | Tursun M.,Universiti Sains Malaysia | Chidan Kumar C.S.,Ege University | And 4 more authors.
Journal of Theoretical and Computational Chemistry | Year: 2015

The molecular structure and properties of 1,4-diformylpiperazine (1,4-dfp, C6H10N2O2) were investigated by Fourier transform infrared (FT-IR) spectroscopy, Raman spectroscopy and density functional theory (DFT). The Becke-3-Lee-Yang-Parr (B3LYP) functional was used with the 6-31++G(d,p) basis set. Total energy distribution (TED) analysis of normal modes was performed to identify characteristic frequencies by the scaled quantum mechanical (SQM) method. Halogeno-Analogs of 1,4-dfp were studied to understand the halogen effect. Computations were focused on five conformational isomers of the compounds in the gas phase and in solutions. The computed and experimental frequencies of the C=O stretching vibration of 1,4-dfp were correlated with the empirical solvent parameters such as the Kirkwood-Bauer-Magat (KBM) equation, the solvent acceptor number (AN), Swain parameters and linear solvation energy relationships (LSER). The electronic properties of the compounds were also examined. The findings from the present work may be useful to understand systems involving the halogens and conformational changes analogous to the compounds investigated. © 2015 World Scientific Publishing Company. Source


Alyoruk M.M.,Dumluplnar University | Aierken Y.,University of Antwerp | Caklr D.,University of Antwerp | Peeters F.M.,University of Antwerp | Sevik C.,Anadolu University
Journal of Physical Chemistry C | Year: 2015

Piezoelectricity is a unique material property that allows one to convert mechanical energy into electrical one or vice versa. Transition metal dichalcogenides (TMDC) and transition metal dioxides (TMDO) are expected to have great potential for piezoelectric device applications due to their noncentrosymmetric and two-dimensional crystal structure. A detailed theoretical investigation of the piezoelectric stress (e11) and piezoelectric strain (d11) coefficients of single layer TMDCs and TMDOs with chemical formula MX2 (where M= Cr, Mo, W, Ti, Zr, Hf, Sn and X = O, S, Se, Te) is presented by using first-principles calculations based on density functional theory. We predict that not only the Mo- and W-based members of this family but also the other materials with M= Cr, Ti, Zr and Sn exhibit highly promising piezoelectric properties. CrTe2 has the largest e11 and d11 coefficients among the group VI elements (i.e., Cr, Mo, and W). In addition, the relaxed-ion e11 and d11 coefficients of SnS2 are almost the same as those of CrTe2. Furthermore, TiO2 and ZrO2 pose comparable or even larger e11 coefficients as compared to Mo- and W-based TMDCs and TMDOs. Our calculations reveal that TMDC and TMDO structures are strong candidates for future atomically thin piezoelectric applications such as transducers, sensors, and energy harvesting devices due to their piezoelectric coefficients that are comparable (even larger) to currently used bulk piezoelectric materials. © 2015 American Chemical Society. Source


Vogel D.L.,Iowa State University | Armstrong P.I.,Iowa State University | Tsai P.-C.,Iowa State University | Wade N.G.,Iowa State University | And 7 more authors.
Journal of Counseling Psychology | Year: 2013

Researchers have found that the stigma associated with seeking therapyparticularly self-stigma can inhibit the use of psychological services. Yet, most of the research on self-stigma has been conducted in the United States. This is a considerable limitation, as the role of self-stigma in the help-seeking process may vary across cultural groups. However, to examine cross-cultural variations, researchers must first develop culturally valid scales. Therefore, this study examined scale validity and reliability of the widely used Self-Stigma of Seeking Help scale (SSOSH; Vogel, Wade, & Haake, 2006) across samples from 6 different countries (England, Greece, Israel, Taiwan, Turkey, and the United States). Specifically, we used a confirmatory factor analysis framework to conduct measurement invariance analysis and latent mean comparisons of the SSOSH across the 6 sampled countries. Overall, the results suggested that the SSOSH has a similar univariate structure across countries and is sufficiently invariant across countries to be used to explore cultural differences in the way that self-stigma relates to help-seeking behavior. © 2012 American Psychological Association. Source


Apaydin H.,Dumluplnar University | Kitis S.,Dumluplnar University
2015 Medical Technologies National Conference, TIPTEKNO 2015 | Year: 2015

The dental instruments are reutilized being subjected to sterilization process because of the high costs of the dental instruments. For this reason, sterilization process is highly important for dentistry. Microorganism can infect to the dental instrument used for a patient, from the patients' saliva, respiratory secretion and blood. This situation poses a risk for the other patients and dentists. For this reason, sterilization process is realized. At the present time, the most reliable and effective method for the sterilization methods are dry heat and pressurized steam methods. In this study, medical instrumentation is made for sterilization using the dry heat method. © 2015 IEEE. Source

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