Dumluplnar University

Kütahya, Turkey

Dumluplnar University

Kütahya, Turkey
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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.


Kaya K.,Florida State University | Kaya K.,Dumluplnar University | Roy S.,Florida State University | Nogues J.C.,Florida State University | And 4 more authors.
Journal of Medicinal Chemistry | Year: 2016

We report pH-switching properties of the new family of dipeptide-acetylene conjugates where pH-gated light-activated double-strand (ds) DNA cleavage is controlled by variations in electronic and geometric parameters. The conjugates have higher activities at the slightly acidic pH values that separate normal and cancerous tissue (pH < 7). This favorable pH dependence originates from several elements of structural design. Basicities of the two amines determine the threshold pH range where the changes in binding and reactivity are observed, whereas the distance between the two amino groups and the hydrophobic aryl alkyne moiety can further modulate DNA binding. The changes of the protonation state from a neutral molecule to a dication results in dramatically increased efficiency of ds DNA photocleavage, the most therapeutically valuable type of DNA cleavage. © 2016 American Chemical Society.


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.


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.


Kesan G.,University of South Bohemia | Durchan M.,University of South Bohemia | Durchan M.,Academy of Sciences of the Czech Republic | Tichy J.,University of South Bohemia | And 9 more authors.
Journal of Physical Chemistry B | Year: 2015

In order to estimate the possible structure of the unknown carbonyl carotenoid related to isofucoxanthin from Chromera velia denoted as isofucoxanthin-like carotenoid (Ifx-l), we employed steady-state and ultrafast time-resolved spectroscopic techniques to investigate spectroscopic properties of Ifx-l in various solvents. The results were compared with those measured for related carotenoids with known structure: fucoxanthin (Fx) and isofucoxanthin (Ifx). The experimental data were complemented by quantum chemistry calculations and molecular modeling. The data show that Ifx-l must have longer effective conjugation length than Ifx. Yet, the magnitude of polarity-dependent changes in Ifx-l is larger than for Ifx, suggesting significant differences in structure of these two carotenoids. The most interesting spectroscopic feature of Ifx-l is its response to solvent proticity. The transient absorption data show that (1) the magnitude of the ICT-like band of Ifx-l in acetonitrile is larger than in methanol and (2) the S1/ICT lifetime of Ifx-l in acetonitrile, 4 ps, is markedly shorter than in methanol (10 ps). This is opposite behavior than for Fx and Ifx whose S1/ICT lifetimes are always shorter in protic solvent methanol (20 and 13 ps) than in aprotic acetonitrile (30 and 17 ps). Comparison with other carbonyl carotenoids reported earlier showed that proticity response of Ifx-l is consistent with presence of a conjugated lactone ring. Combining the experimental data and quantum chemistry calculations, we estimated a possible structure of Ifx-l. © 2015 American Chemical Society.


Mata F.,University of Castilla - La Mancha | Ozel E.,Dumluplnar University | Oteyaka M.O.,Dumluplnar University
Journal of Thermoplastic Composite Materials | Year: 2013

The polyetheretherketone (PEEK) composites are high-performance materials. These composites have potential applications in various structural components. It is necessary to investigate the cutting parameters of PEEK composites. In this article, an attempt is made to investigate the effect of cutting parameters on the cutting force of carbon and glass fiber-doped PEEK and compare it with unreinforced PEEK when cutting with polycrystalline diamond (PCD) or cemented carbide (K15) tools. The results of statistical analyses highlight that each machining force (Fx, Fy, and Fz) is influenced by the main factors (cutting tools (A), material type (B), feed rate (C), and cutting speed (D)) and some of the interactions (AB, AC, BC, BD, and CD). For the main factors, the material type has a higher effect on Fx and Fy, while Fz is influenced more by feed rate. Cutting tools have no significant effect on Fx and Fy. The regression models used fit 99.56, 92.75, and 90.65% of Fz, Fx, and Fy, respectively. Developed models show that the feed rate has a higher effect on machining force than the cutting speed. The model graphs illustrate that reinforced PEEK has a higher machining force compared with unreinforced PEEK when cutting with PCD or K15. Furthermore, machining with K15 tools increases the cutting force of PEEK-reinforced carbon, while it decreases that of PEEK-reinforced glass and unreinforced PEEK. The investigation of the interaction with the machining force shows that Fx is more influenced by AB, BC, and BD interactions. Fy shows similar results as Fx, but it is also influenced by AC interaction. However, Fz is influenced by all the interactions except BD. © The Author(s) 2013.


Sadik S.A.,Dumluplnar University | Basgumus A.,Dumluplnar University | Durak F.E.,Dumluplnar University | Karlik S.E.,Uludag University | Altuncu A.,Dumluplnar University
ELECO 2015 - 9th International Conference on Electrical and Electronics Engineering | Year: 2015

In long-haul and high-bit-rate optical fiber transmission systems Polarization Mode Dispersion (PMD) is one of the main reasons for pulse broadening. In order to reduce PMD-based problems, current studies rely on novel PMD compensators and low-PMD fiber productions. In this paper, after describing theoretical information about PMD and optical fiber spinning process, different spin profiles are examined. Comparative analysis of spin profiles is made and spin parameters giving successful results for low-PMD fibers are obtained for each spin profile. Simulation results show that for fixed spin period of 1 m 2.76 turns/m and 5.64 turns/m are proper spin amplitude values for sinusoidal and amplitude modulated (AM) spin profiles, respectively, while 3.40 turns/m and 3.75 turns/m are recommended spin amplitudes for triangular and trapezoidal spin profiles, respectively. Using these parameters, related spin profiles give better differential group delay (DGD) reduction results individually. © 2015 Chamber of Electrical Engineers of Turkey.


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.


Acar S.,Dumluplnar University | Saraoglu H.M.,Dumluplnar University | Akar S.A.,Fatih University
2015 19th National Biomedical Engineering Meeting, BIYOMUT 2015 | Year: 2015

Electroencephalogram (EEG)-based emotion recognition is a rapidly growing field. This paper presents a research study on identifying the changes caused by human emotions in brain signals through EEG records and further examines the availability of chaotic analysis for emotion prediction applications. We designed an efficient presentation including 30 pictures from International Affective Picture System (IAPS) which could stimulate the emotions of happiness, sadness and fear. A group of 20 persons consisting of 12 males and 8 females took place in our research study as subjects voluntarily. In order to acquire the EEG signals under picture induction environment, a total of 30 pictures that might reveal the feelings of happiness, sadness and fear were shown to the volunteer subjects that participated in the study voluntarily. Data acquired from EEG records were analyzed by using chaotic analysis through MATLAB program and two different attributes consisting of »Largest Lyapunov Exponent (LLE)» and »Correlation Dimension» were obtained. The mean values of each attribute that obtained through chaotic analysis were compared by using independent t-test and dependent t-test in SPSS program with 95% confidence interval and a P value of p<0.05. The independent samples t-test was used to compare the mean values of each attribute relevant to two unrelated groups (Females-Males) and Dependent samples t-test was used to test whether the mean values of two related observations (two observations for per subject) significantly differs from the hypothesized value. Our study shows that chaotic analysis promises hope for future studies. © 2015 IEEE.


Akgul Y.,Dumluplnar University
Iberian Conference on Information Systems and Technologies, CISTI | Year: 2016

In recent years, many people have devoted their efforts to the issue of quality of Web site. The concept of quality consists of many criteria like the quality of service perspective, user perspective, content perspective and usability perspective. The Quality and reliability of the e-government website is a crucial factor for the successful implementation of the information society. In this study the effectiveness of various design parameters (HTML errors, load time and browser compatibility problems etc.) on e-government website will be analysed by taking into considerations different website development standards recommended for them. This study conducts test to measure the quality of e-government website of Turkey via web diagnostic tools online to analyse the different government website by testing their existing design with the help of online tools to understand their deviations from the standards and to evaluate their performance with respect to the parameters considered by the tool. The results indicated that there is an urgent need to improve the design features of e-government website in order to be more effective and user-centric. The author took 51 Government websites of Turkey, analyse their different parameters and on the basis of analysis shows their overall compliance with the standards and guidelines. With the help of the results obtained a table analysis of the websites is made by the authors that determine the effect of these parameters on the efficiency and accessibility of the government websites. © 2016 AISTI.

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