Gümüşhane ÜniversitesiGümüşhane ÜniversitesiAçık Erişim Arşivi · RDL Open

Sürdürülebilir Kalkınma Amaçları

Yazarlar

Yayınlar

Yeniden eskiyeEskiden yeniye
  • MakaleYalnız künye2018Scopus SJRQ2
    Automatic extraction of sparse trees from high-resolution ortho-images

    Bayram, Bulent; Seker, Dursun Zafer; Jamil, Akhtar; Reis, Hatice Catal; Demir, Nusret; Bozkurt, Salih; Ince, Abdulkadir; Kucuk, Turgay

    Obtaining information about tree species distribution in agricultural lands is a topic of interest for various applications, such as tree inventory, forest management, agricultural land management, crop estimation, etc. This information can be derived from images obtained from modern remote sensing technology, which is the most economical way as compare to field surveys covering large geographic areas. Therefore, in this study, a new method is proposed for extraction and counting of sparse and regular distributed individual pistachio trees from agricultural areas on large scale from high-resolution digital ortho-photo maps, which were obtained using an airborne sensor (Ultracam-X). The input images were first smoothed by applying Gaussian filter to reduce the impact of noise. Normalized difference vegetation indices (NDVI) were then derived to obtain vegetation areas followed by Otsu's global thresholding algorithm to obtain candidate tree areas. Further, connected component (CC) analysis was applied to segregate each object. Morphological processing was performed to fill holes within tree objects and get smooth contours, which were obtained by using the Moore-neighbor tracing method (MNTM) for each CC, while geometrical constraints were applied to undermine possible non-tree elements from output image. To further improve the segmentation results for sparse trees, a new method was applied, called quadratic local analysis (QLA). QLA helped to segment the trees, which were missed by the Otsu method due to low contrast and resulted in improved accuracy (3-6%). The obtained results were compared with well-known support vector machine (SVM) classifier. Proposed method produced slightly better results (1-5%) than SVM for extraction of pistachio trees and obtained accuracy for QLA and SVM were 96 and 91% for region 1, while 91 and 90% for region 2 respectively.

    • SDG 2 · Açlığa Son
    • SDG 15 · Karasal Yaşam
    AtıfScopus3WoS2OpenAlex3
    ScopusWeb of Scienceİncele
  • MakaleYalnız künye2017
    Mathematical modeling of thin-layer microwave drying of corn husk and investigation of powder properties

    Akdogan, A.; Koç, G. Caliskan; Dirim, S. N.

    The aim of this study is to investigate the effect of different microwave powers on the drying kinetics of chopped corn husks and to determine the properties of the corn husk powder obtained after grinding the dried product. The drying behavior of corn husks was determined using eleven commonly used thin-layer models. The obtained powders were analyzed for moisture content, water activity, color, tapped and bulk densities, wettability, flowability, and cohesiveness. In addition, the effective moisture diffusivity and activation energy of corn husks were calculated from drying data. From the analysis of the results, the drying rate and the drying time of corn husk slices considerably decreased with increasing microwave power. Among all used drying models, the Page model was found to satisfactorily describe the kinetics of microwave drying of corn husk. The effective moisture diffusivity values ranged from 2.264x10(-10) to 8.941x10(-10) m(2)s(-1).

    AtıfWoS2
    Web of Scienceİncele
  • MakaleYalnız künye2017
    Chemical composition and bioactive properties of the essential oil of Rhinanthus angustifolius subsp grandiflorus

    Kaya, A. A.; Üçüncü, O.; Ilter, S. M.; Baltaci, C.; Öztürk, S.

    In this study, the chemical composition and antimicrobial activities of the essential oil of the Rhinanthus angustifolius subsp. grandiflorus plant were investigated. Essential oil was obtained from all parts of the plant by hydrodistillation and was analyzed by GC-FID and GC-MS. 31 components representing 99.46% of the total oils were characterized. The main components of these species were found to be 2,3-dihydro-5-methyl-1H-indene (25.14%), alpha-cubebene (19.27%), 1-hexadecene (15.59%) and hexadecanoic acid (12.14%). The antimicrobial activity of the isolated essential oil was investigated. Antimicrobial activity was observed against B. cereus, E. coli, E. coli O157:H7 and S. Aureus microorganisms. Moreover, an effect on the ferments of B. cereus, E. coli, E. coli O157:H7 and S. Aureus was detected.

    AtıfWoS4
    Web of Scienceİncele
  • MakaleAçık Erişim2017
    Calculation of the Index of Turkey's Vulnerability in Natural Disasters

    Bostan, Sedat; Yaprak, Unal

    Aim: The aim of this study was to determine the vulnerability levels of Turkey in terms of natural disasters and to guide decision makers and strategists in this field. In the study, disaster data obtained for 1987-2011 were used, and the disaster of type was most observed in our country. Materials and Methods: Data vulnerability indices against the disasters were calculated using a Data Envelopment Analysis Program (DEAP) 2.1 program with a Data envelopment analysis-based output-oriented Malmquist Total Factor Productivity Index method. Results: The regions of Turkey, which have the highest vulnerability index for the disasters, were TRA2 (0.323), TRB2 (0.305), and TRB1 (0.287) regions. In addition, it was seen that in the Black Sea region, the TR82 (0.267) region was more vulnerable than the other places of the region. In this study, a picture of the whole country over a period of 25 years in terms of disasters was captured. Conclusion: In the picture, it is seen that economic and social costs endured due to disasters are separated into two regions starting from the region of Eastern Anatolia and the north branch extends across the Black Sea region and the other south branch reaches to the Mediterranean.

    AtıfOpenAlex1
    Web of ScienceTR Dizinİncele
  • MakaleYalnız künye2017
    THE USABILITY OF VOLCANIC ROCKS FROM UPPER EUPHRATES PART IN THE EASTERN ANATOLIA REGION AS CONCRETE AGGREGATE

    Aksüt, Yavuz Selim; Yetgin, Sukru

    In this study; the engineering properties of volcanic rocks obtained from four different quarries in the province of Erzincan region in the Upper Euphrates Part in the Eastern Anatolia Region were investigated. In laboratory studies, the experiments including bulk and aggregate tests (bulk and dense unit weight, specific mass, water absorption, Los Angeles test for resistance to wear, freezing resistance and uniaxial compressive strength) were conducted on 5 volcanic samples according to the standards (Turkish Standard, British Standard and ASTM) and in the second stage, grading of concrete tests (grading of the concrete aggregates, concrete preparation, slump test, specific density of concrete, uniaxial compressive strength, modulus of elasticity, splitting tensile strength, abrasion resistance and capillarity) were performed on the concrete samples with volcanic aggregates. For fresh concrete composition, water/cement ratio was selected as the main variable providing homogeneous mixing and the highest strength to the concrete samples with a specific granulometry. Cylindrical concrete samples were produced with a variety of water/cement ratios cured for 7 and 28 days in water and their compressive strengths were assessed in the light of their physical and mechanical properties. The results obtained from aggregates and concrete tests, which were performed in line with the standards showed that especially Yassitepe-Dogu (YTD) sample, one of the volcanic rocks from Erzincan region can be used as concrete aggregate. It was observed that compressive strength of the concrete samples could satisfy C25/30 strength class and upper classes. In addition, it was understood that they can be used in highways, bridges, dams, buildings etc., especially as structural concrete.

    AtıfWoS1
    Web of Scienceİncele
  • MakaleAçık Erişim2017
    Reconsideration of Orhon Inscriptions in the context of Cultural Memory of Turkish Society: The Body and Memory of Stone

    Demir, Sertac Timur

    This paper aims to deal with the Orhon Inscriptions among the concepts and debates on cultural memory for the purpose of 'remembering', 'adaptation', 'updating' and 'refunctionalising' through the television documentary Time Traveller: Following the Steps of the Turks. What do the inscriptions tell us about today? What does deducing, analysing and developing a methodology for this provide to the national heritage under the titles of past, identity, belonging and memory? In this article, accordingly, cultural memory questions and suggestions are offered through the Orhon Inscriptions. Documents and documentaries, without doubt, are instruments of interpreting the past and projecting the future. This research is conceptual as well as methodological. In this respect, a minimal cultural memory glossary is fictionalised and thus a sort of conceptual ground is generated.

    AtıfOpenAlex2
    Web of Scienceİncele
  • MakaleAçık Erişim2017
    Reflections of the Terrorist Attacks in 2016 on Humor Magazines

    Türten, Elif

    Cartoon and politics have been in close relationship throughout the history of the press. Political structure of the period, social events that developed due to the political or political events that took place at that time and political actors are reflected on the caricatures and humor magazines. In our country, the year 2016 was very intense in terms of agenda. 27 terrorist attacks took place throughout 2016. During these attacks, hundreds of people lost their lives and thousands were injured. In the study, it was investigated how the terrorist incidents in 2016, which the country experienced in a state of mourning, were handled in the humor magazines, how much space was provided and how the terrorist incidents were evaluated. In this regard, the research question is set as how the political trends and ideological structures of the humor magazines that are the subject of study are reflected in the cartoons. In this context, cover pages of Penguin, Girgir and Uykusuz Magazines were used as a method of critical discourse analysis by Teun van Dijk. These magazines were selected because they constitute important examples of political cartoons and have a large reader base in Turkey. As a result of the examination, 8 cover pages were drawn in Penguen Magazine, 6 in Girgir Magazine and 7 in Uykusuz Magazine. A total of 21 cover pages were examined in the study. The Penguen Magazine approached at people who were exposed to terrorist incidents. Girgir Magazine criticized the events. However, the most serious criticism about the subject was made by Uykusuz Magazine. In general, disappointment from terrorist events has found place in cartoons.

    • SDG 16 · Barış, Adalet ve Güçlü Kurumlar
    Web of ScienceTR Dizinİncele
  • MakaleYalnız künye2017Scopus SJRQ3
    EXPERIMENTAL INVESTIGATION THE EFFECTS OF ETHANOL AND DIETHYL ETHER ADDITION INTO DIESEL FUEL ON ENGINE PERFORMANCE AND EXHAUST EMISSIONS

    Sezer, Ismet

    In this study, effects of ethanol and diethyl ether addition into diesel fuel on the performance and emissions of a diesel engine were experimentally investigated. A commercial diesel fuel and three different blends prepared with 15% ethanol, 15% ethanol and 2% diethyl ether and 15% ethanol and 4% diethyl ether were used in the tests. The experiments were performed at an engine speed of 1500 rpm and under various loads by using a single cylinder direct injection diesel engine. The injection, combustion, performance and emissions parameters were evaluated for baseline fuel and blends. The results show that, the injection pressure decreases for all blends, and diethyl ether addition causes a delay in the injection timing. The burnt mass fraction is lower for ethanol and diethyl ether blends during early combustion phase, while it increases for diethyl ether blends during the progressive combustion phase. Ethanol and diethyl ether blends also give the reductions in the cylinder pressure and temperature. Air excess coefficient increases the rate by 9.3-10.4%, but exhaust gas temperature decreases the rate by 4.8-5.5% when using ethanol and diethyl ether blends. Although ethanol blend causes a decrement of 1.4% in engine power, reductions in engine power are between 0.3% and 1.1% for diethyl ether blends. Both ethanol and diethyl ether blends yield increments the rate by 14.7-17.2% in brake thermal efficiency and a reduction of 8.5% in brake specific fuel consumption. The reductions were obtained the rate by 6.8-18.2% for NOx and 10.3-13.8% for CO2 emissions, when using the blended fuels. Ethanol and diethyl ether blends cause the increments the rate by 5-12.5% for HC emission, while CO emission fluctuates depending on the engine load.

    AtıfWoS5
    Web of Scienceİncele
  • MakaleYalnız künye2017
    MUSHROOM MANAGEMENT APPROACH

    Kiliç, Taskin; Olgun, Hatun

    The concept of Mushroom Management has been involved in the management science in recent years and is named after the metaphor of raising mushrooms. Just as mushrooms are fertilized, left in the dark and cultivated in a short time; mushroom managers also provide the necessary business resources to employees, however, they do not share the policies, revenues of the organization and business risks with them. The objective of study is to embrace and examine the concept of mushroom management theoretically, develop an assessment instrument for determining this perception and bring the concept and the scale in the Turkish literature. The theoretical part was formed by using the limited number of studies in literature. Field study was conducted by applying a questionnaire to 200 employees at a private health institution in the province of Trabzon with the help of an 8 point Likert scale, which was developed for measuring the concept of mushroom management. The acquired data were analyzed by using the SPSS and LISREL softwares. It was determined that study participants had moderate level of mushroom management perception. 58% of employees who participated in the study stated that the management did not establish a direct communication with junior employees and share all the information about the organization. On the other hand, a Turkish scale of eight items measuring the mushroom management perception was developed within the scope of this study. Besides, as mushroom management contains total opposite applications of open, democratic, participative and transparent management applications; it is perceived as a negative approach. However, it might turn into a useful means for managers in some cases (like preventing chaos, preserving the organization's confidentiality) in practice.

    Web of Scienceİncele
  • MakaleYalnız künye2017Scopus SJRQ1
    The efficiency of bedside ultrasonography in patients with wrist injury and comparison with other radiological imaging methods: A prospective study

    Oguz, Ahmet Burak; Polat, Onur; Eneyli, Muge Gunalp; Gulunay, Behnan; Eksioglu, Merve; Gurler, Serdar

    Study objective: Our aim was to determine the efficiency of ultrasound (US) scanning in patients with wrist trauma admitted to the emergency department and to compare US diagnostic usagewith other radiological imagingmethods. Methods: Patients who presented to the emergency department with wrist injury and who met the inclusion criteria and exclusion criteria were eligible. For all patients, US evaluation of thewhole wristwas performed by an emergency physician before other radiological imagingmethods (radiographies, computed tomography (CT) and magnetic resonance (MR) imaging). All of the patients included in the study underwent US, radiography, CT, and MR. Results: During the study, 122 patients were admitted with a wrist injury. After filtering for the exclusion criteria, 80 patients were included in the study. The sensitivity of US scanning in detecting fractures was 95.31% (95% confidence interval [CI]: 87.1-98.39), the specificity was 93.75% (95% CI: 71.67-98.89), and the positive predictive value was 98.39% (95% CI: 91.72-99.85), and the negative predictive value was 83.33% (95% CI: 72.98-90.41). The sensitivity of US scanning in detecting tendon and ligamentous structural injury was 66.67% (95% CI: 41.71-84.82), the specificity was 100% (95% CI: 94.42-100), the positive predictive valuewas 100% (95% CI: 94.29-99.89), and the negative predictive was 92.86% (95% CI: 84.25-97.14). Conclusion: US scanning is an effective method that can be applied in the emergency department to adult patients to diagnose distal forearm and carpal bones fractures. In soft tissue injuries, US and MR examinations produce similar results. (C) 2017 Elsevier Inc. All rights reserved.

    • SDG 3 · Sağlık ve Kaliteli Yaşam
    AtıfWoS18OpenAlex25
    Web of SciencePubMedİncele
  • MakaleYalnız künye2017Scopus SJRQ1
    Late Jurassic Magmatism and Stratigraphy in the Eastern Sakarya Zone, Turkey: Evidence for the Slab Breakoff of Paleotethyan Oceanic Lithosphere

    Dokuz, Abdurrahman; Aydinçakir, Emre; Kandemir, Raif; Karsli, Orhan; Siebel, Wolfgang; Derman, Ahmet Sami; Turan, Mehmet

    Middle-Late Jurassic Cimmerian events in Turkey have been actively discussed in the past three decades, but proposed tectonic models associated with magmatism, metamorphism, and stratigraphic features remain controversial. To address this issue, Upper Jurassic mafic lavas are investigated at three locations (Alucra, Gumushane, and Olur) in the eastern Sakarya Zone, northeastern Turkey. These lavas are submarine and form planar flows parallel with the bedding plane in the Upper Jurassic carbonate sequence near the base or just below in the clastic sedimentary rocks. The basaltic lavas show calc-alkaline features and possess Nb-Ta values and Nb/U, Nb/La, and Ce/Pb ratios that are greater than those of island arc basalts. Multielement patterns are almost hump shaped, similar to ocean island basalts, which experience Pb depletion and weak negative Nb-Ta, Zr-Hf, and Ti anomalies. The low initial (Sr-87/Sr-86) ratios (0.70372-0.70554), positive initial epsilon(Nd) values (+2.7 to +4.4), and initial Pb isotope ratios that plot between mid-ocean-ridge and ocean island basalts are consistent with a melt derived from subcontinental lithospheric mantle, metasomatized by earlier fluids from subducted sediments and plume materials from the asthenosphere. Moderate Dy/Yb ratios with an average value of 1.8 imply partial melting in the spinel-garnet transition zone at depths of similar to 70-100 km. Slab breakoff is suggested as a geodynamic mechanism that accounts for these geochemical signatures. This inference is also favored by stratigraphic and sedimentologic evidence from the Upper Jurassic-Lower Cretaceous sedimentary rocks, which is consistent with short-lived vertical (epirogenic) movements in the region. Lower-Middle Jurassic sequences are transgressive, suggesting that subduction-related extension opened a backarc basin (Neotethys) in the south of the Sakarya Zone. Upper Jurassic-Lower Cretaceous carbonates point tectonically to tranquility during carbonate deposition in the Neotethys Ocean, which seems to have been achieved by complete closure of the Paleotethys in the north. About 15-20 m.yr. later (Kimmeridgian), after first carbonate deposition, intraplate-typemafic lavas ascended up to the shelf surface of the Neotethys. This was followed by formation of disconformity surfaces and then accumulation of coarse clastic sediments. All this points to a short-lived epirogenic movement that we ascribe to the breakoff of the southward-subducting Paleotethyan oceanic lithosphere in the Late Jurassic.

    AtıfWoS73OpenAlex76
    Web of Scienceİncele
  • MakaleYalnız künye2017Scopus SJRQ2
    Finite Modeling Updating Effects on the Dynamic Response of Building Models

    Günaydin, M.; Adanur, S.; Altunisik, A. C.; Sevim, B.; Bayraktar, A.

    An improved finite element model was used to obtain more accurate modeling of engineering structures. The main goal of this paper was to determine how this improved modeling procedure affects the dynamic response of buildings based on experimental modal parameters such as natural frequencies, mode shapes and damping ratios. For experimental assessment, three small, one-story, two-bay, reinforced concrete buildings with raft foundation were constructed under laboratory conditions. The initial three-dimensional finite element models, built with the ANSYS software, were used to analytically identify modal parameters, including natural frequencies and mode shapes. Following the analytical study, the ambient vibration tests were performed to obtain modal parameters, experimentally. The enhanced frequency domain decomposition method and the stochastic subspace identification method were used to identify the modal parameter. The analytical and experimental modal parameters were compared and then initial finite element models were updated to minimize the differences by changing of some uncertain parameters such as materials properties. With model updating, the maximum difference between the measured and initially obtained frequency was reduced from 28.47 to 4.88%. To show the model updating effect on dynamic response of building models, dynamic analysis with the experimental computed damping ratios and 5% damping ratio were carried out using 1992 Erzincan earthquake ground motion record. For the experimental damping ratios, the maximum differences in the displacements and stresses between the initial and updated models were obtained as 23 and 32%, respectively. These differences were calculated as 43 and 15 % for the 5 % damping ratio. Comparisons of dynamic analyses results for the initial and updated model show that the finite element model updating affects the dynamic response of the buildings considerably.

    AtıfWoS12OpenAlex11
    Web of Scienceİncele
  • MakaleYalnız künye2017Scopus SJRQ1
    Cordierite-bearing strongly peraluminous Cebre Rhyolite from the eastern Sakarya Zone, NE Turkey: Constraints on the Variscan Orogeny

    Dokuz, Abdurrahman; Külekçi, Elif; Aydinçakir, Emre; Kandemir, Raif; Alçiçek, M. Cihat; Pecha, Mark E.; Sünnetçi, Kadir

    The Cebre Rhyolite with an outcropping area up to 12 km(2) is one of the rare extrusions in the Variscan basement of the Sakarya Zone. The unit consists of high-K calc alkaline rhyolites (SiO2 = 74-82 wt.%). Abundant phenocrysts of quartz and K-feldspar are accompanied by subordinate cordierite phenocrysts, rare muscovite microphenocrysts and biotite microcrysts set in a fine-grained groundmass. Three types of rock fragments (xenoliths) have been recognized; (i) porphyritic, (ii) equigranular hypabyssal and (iii) hypocrystalline fragments. Zircon U-Pb dating indicates that the Cebre Rhyolite was extruded at 332.8 +/- 4.38 Ma, which post-dates the Variscan low temperature metamorphism and pre-dates the emplacement of I-type granitic intrusions (325-303 Ma).The samples are strongly peraluminous with A/CNK values ranging from 1.48 to 2.95 and A/NK from 1.49 to 2.99. They have very high K2O (3.72-7.42 wt.%) and Al2O3 (10.77-14.11 wt.%) contents, but very low CaO (0.02-0.21 wt.%), Na2O (0.05-0.78 wt.%) and MgO (0.3-0.21 wt.%) contents. The samples show geochemical affinity with the upper continental crust, e.g., enrichment of large ion lithophile elements (LILEs; K, Rb, U, Th, Pb), depletion of high field strength elements (HFSEs; Nb, Ta, Ti), Sr, P and Eu, but epsilon Nd-(t) values (- 3.06 to - 8.75) and isotope ratios of Sr-(t)((87) Sr/Sr-86 = 0.70499-0.70915) and Pb-(t) (Pb-206/Pb-204 = 16.41-17.570, Pb-207/Pb-204 = 15.54-15.59, Pb-208/Pb-204 = 36.20-37.22) are similar to those of the lower crust. Geochemical and isotope data indicate that the Cebre Rhyolite was generated by melting of metapelitic rocks with some addition of intermediate metaigneous derived magma. As a geodynamic model, we propose that the Variscan Orogeny in Turkey was occurred by collision of Gondwana with an arc/terrane separated from the southern margin of Laurussia. This collision was followed shortly after by splitting of oceanic lithosphere into two pieces and sinking down into asthenosphere. Rapid upwelling of asthenosphere to space emptied by previous oceanic lithosphere provided heat for high temperature metamorphism and anatexis of metasedimentary rocks in the crust. (C) 2017 Elsevier B.V. All rights reserved.

    AtıfWoS28OpenAlex33
    Web of Scienceİncele
  • EditoryalAçık Erişim2017Scopus SJRQ3
    A young girl presenting with cardiac thrombus: An unusual complication of inflammatory bowel disease

    Demirel, Muhittin; Sökmen, Erdogan; Acar, Emrah; Sivri, Serkan

    • SDG 3 · Sağlık ve Kaliteli Yaşam
    Web of SciencePubMedİncele
  • MakaleYalnız künye2017Scopus SJRQ4
    The correlation between tissue Helicobacter pylori severity and the increase in serum neutrophil/lymphocyte ratio in patients with active chronic gastritis

    Atayan, Yahya; Hacisalihoglu, Payam

    Introduction: Helicobacter pylori are a microaerophile gram-negative bacteria and the most frequent factor of chronic gastritis. Recently, there has been an inclination to various non-invasive tests to determine the severity of H. pylori infection in the gastric tissue. The serum neutrophils/lymphocytes rate (NLR) is a simple, safe, non-invasive and active inflammation reagent. The purpose of this study is examining the correlation between the increase in the positivity/severity of H. pylori infection and the increase in the NLR. Material and method: 149 patients were included into the study by considering the Sydney criteria in accordance with H. pylori severity degrees in 3 groups; Mild (n=49), Moderate-Severe (n=67) and Severe (n=33). A Control Group was also formed (n=22) with negative H. pylori by three experienced pathologists. Result: It has been determined that the severity has increased among the groups with H. pylori positive as regard to the increase in serum NLR (r: 0.295, p: 0.017), there has been a significant correlation has been determined between the Control Group and the Moderate-Severe patients (p:0.014), the Severe patients (p:0.002). Conclusion: It is suggested that the serum NLR, which can be used in order to predict the severity of the H. pylori Infection in patients with chronic gastritis, can be a practical, inexpensive and non-invasive test.

    AtıfWoS3
    Web of Scienceİncele
  • MakaleYalnız künye2017Scopus SJRQ1
    How does radioactive iodine affect the nose?

    Server, Ela Araz; Kirgezen, Tolga; Celebi, Ozlem Onerci; Yildiz, Muhammet; Yigit, Ozgur; Cermik, Tevfik Fikret

    Objectives/HypothesisTo determine the effect of radioactive iodine (RAI) treatment on the nasal mucosa and nasal functions. Study DesignProspective clinical study. MethodsThis study included 41 patients (31 female and 10 male) who were treated with RAI for papillary thyroid carcinoma. A visual analogue scale (VAS) was used for subjective evaluation of nasal symptoms. The saccharine test, nasal Schirmer test, and acoustic rhinometry were used for objective evaluation of nasal functions. All tests were administered at baseline (before RAI treatment), and then 1 month and 1 year post-RAI treatment. Only 21 of the patients could be evaluated after 1 year of treatment and were included in the study's analysis. ResultsVAS obstruction and dryness scores 1 month and 1 year post-RAI were significantly higher than the baseline scores (P < .05 and P < .05, respectively). Mean cross-sectional area values 1 month and 1 year post-RAI did not differ significantly from baseline values (P > .05 and P > .05, respectively). Schirmer test results 1 month and 1 year post-RAI treatment were significantly lower than at baseline (P < .05 and P < .05, respectively). Saccharine test results 1 month and 1 year post-RAI were significantly higher than at baseline (P < .05). ConclusionsRAI treatment can adversely affect the nasal mucosa. Nasal dryness and obstruction can occur immediately after RAI treatment. Additional research is warranted to further elucidate the effects of RAI treatment on nasal function. Level of Evidence4. Laryngoscope, 127:2698-2702, 2017

    • SDG 3 · Sağlık ve Kaliteli Yaşam
    AtıfWoS3OpenAlex3
    Web of SciencePubMedİncele
  • MakaleAçık Erişim2017Scopus SJRQ4
    SCREENING FOR ABDOMINAL AORTIC ANEURYSM IN GERIATRIC POPULATION

    Karakus, Ali; Tasin, Veyis; Kartal, Ismail; Kuvandik, Guven

    Aim: An abdominal aortic aneurysm (AAA) is uncommon in people. Male gender and smoking are the most important risk factors. AAA is a condition that may be fatal when diagnosis is delayed This study aimed to emphasize the necessity for screening due to four fatal cases with abdominal aortic aneurysm in a genatric population. Material and Method The study included 320 patients from a nursing home and an emergency department The diameters of abdominal aortas were measured and assessed far risk factors. Results: Of the patients, 232 (72.5% were male and the mean age was 75.65 +/- 7.76 (range: 62-95 years). Hypertension was the most frequent risk factor determined. Mean aortic diameter was found as 18.87 +/- 2.74 mm (range 15-26 mm) No significant associations were detected among risk factors, age groups, and aortic diameter Four cases with abdominal aortic aneurysm died. Discussion AM is the most frequently seen aneurysm among true aneurysms. Major risk factors for AAA include male gender. smoking history. and age >65 years. In advanced ages, particularly in men, screening for AAA reduced deaths caused by rupture. The patients should be assessed for surgical intervention by Taking risk factors into consideration. Large-scale screening studies can reduce risk for mortality.

    • SDG 3 · Sağlık ve Kaliteli Yaşam
    Web of Scienceİncele
  • MakaleAçık Erişim2017Scopus SJRQ2
    Regionalisation of discharges having certain exceedance probabilities and Eastern Black Sea Basin sample

    Saka, Fatih; Yüksek, Omer

    In many of water engineering studies, it is necessary to determine the amount of water or the probability of discharge at a certain value. However, current discharge measurements are limited and located in discharge gauging stations (DGS). Flow duration curves (FDC) belonging to each DGS can be obtained, but it is necessary to estimate discharge values of the areas having no or insufficient discharge data. For this purpose, studies based on the regionalization of discharge values can be applied. In this study, discharge values of 39 DGS located on Eastern Black Sea Basin in Turkey, and temperature and precipitation of weather stations in the region have been obtained. Drainage areas have been determined. Total annual precipitation and temperature values of DGS have been obtained by using Thiessen method. Values having 20%, 30%, 50%, and 90% exceedance probabilities of annual FDC, have also been correlated with basin characteristics using 10-year average daily discharges. Drainage area, drainage density and mean slope of tributary values were chosen as topographic; and mean annual precipitation height and annual temperature values chosen as climatic parameters. As a result, in the ungauged areas, 20%, 30%, 50%, and 90% exceedance probabilities of annual FDC have been estimated by some basin properties and the results were examined.

    • SDG 6 · Temiz Su ve Sanitasyon
    AtıfWoS4OpenAlex6
    Web of Scienceİncele
  • EditoryalYalnız künye2017Scopus SJRQ3
    Spontaneous laryngeal abscess causing dysphagia

    Ata, Nurdogan; Özcan, Irfan Firat

    • SDG 3 · Sağlık ve Kaliteli Yaşam
    AtıfWoS1OpenAlex1
    Web of SciencePubMedİncele
  • MakaleYalnız künye2017Scopus SJRQ2
    Bipolar resistive switching and conduction mechanism of an Al/ZnO/Al-based memristor

    Gul, Fatih; Efeoglu, Hasan

    In this study, a direct-current reactive sputtered AliZnO/Al-based memristor device was fabricated and its resistive switching (RS) characteristics investigated. The optical and structural properties were confirmed by using UV vis spectrophotometry and x-ray diffraction, respectively. The memristive and resistive switching characteristics were determined using time dependent current voltage (I-V-t) measurements. The typical pinched hysteresis I-V loops of a memristor were observed. In addition, the device showed forming-free, uniform and bipolar RS behavior. The low electric field region exhibited ohmic conduction, while the Schottky emission (SE) was found to be the dominant conduction mechanism in the high electric field region. A weak Poole-Frenkel (PF) emission also appeared. In conclusion, it was suggested that the SE and PF mechanisms were related to the oxygen vacancies in the ZnO. (C) 2016 Elsevier Ltd. All rights reserved.

    AtıfWoS62OpenAlex76
    Web of Scienceİncele