Sürdürülebilir Kalkınma Amaçları
Yazarlar
- Uzun, Sevda(67)
- Merdan, Mehmet(59)
- Duran, Celal(49)
- Ozdes, Duygu(46)
- Kaygusuz, Abdullah(45)
- Demir, Selim(37)
- Turan, Ibrahim(37)
- Karsli, Orhan(36)
- Öztürk, Serkan(35)
- Dokuz, Abdurrahman(34)
- Araz, Onur(32)
- Kandemir, Raif(31)
- Kulakaç, Nurşen(29)
- Sipahi, Ferkan(29)
- Arslan, Mehmet(27)
- Baltaci, Cemalettin(27)
- Baltacı, Cemalettin(27)
- Kurt, Kemal(27)
- Topal, Fevzi(27)
- Gücer, Mehmet Ali(25)
- Peker, Iskender(25)
- Aydin, Faruk(24)
- Bayrakdaroglu, Serdar(24)
- Maden, Nafiz(24)
- Ozturk, Samet(24)
- Vural, Alaaddin(24)
- Yolcu, Halil(24)
- Yücel, Cem(24)
- Aliyazicioglu, Yuksel(23)
- Kankal, Murat(23)
- Reis, Hatice Catal(23)
- Ürkek, Bayram(23)
- Günen, Mehmet Akif(22)
- Kurnaz, Muammer(22)
- Topal, Meryem(22)
- Karimullah, Suud Sarim(21)
- Uysal, Ibrahim(21)
- Ashyralyyev, Charyyar(20)
- Aydin, Aydanur(20)
- Bayraktar, Alemdar(20)
Yayınlar
- MakaleAçık Erişim2017Scopus SJRQ4Synthesis of some natural sulphonamide derivatives as carbonic anhydrase inhibitors
Gokcen, Taner; Al, Melike; Topal, Meryem; Gulcin, Ilhami; Ozturk, Turan; Goren, Ahmet C.
Carbonic anhydrase inhibitor; sulphonamides; p-hydroxybenzoic acid; 3,4,5-trihydroxybenzoic acid (gallic acid).Carbonic anhydrase inhibitors are both in clinical use as antiglaucoma, diuretics, antiepileptics and management of altitude sickness, and under investigation as anticancer, anticonvulsant and antiobesity agents. Sulphonamides have been known for decades as carbonic anhydrase inhibitors and are in clinical use. Sulphonamide derivatives of p-hydroxybenzoic acid and 3,4,5-trihydroxybenzoic acid (gallic acid) were synthesized and their inhibition values over hCA I and hCA II isozymes, purified from human erythrocyte cells by Sepharose-4B-L-tyrosine-sulphanilamide, were determined. Compounds synthesized showed efficient carbonic anhydrase inhibition activity at low nM levels.
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İncele - MakaleAçık Erişim2017Scopus SJRQ3Synthesis, in vitro DNA interactions, cytotoxicities, antioxidative activities, and topoisomerase inhibition potentials of Mn(II), Co(II), Ni(II), Cu(II), and Zn(II) complexes with azo-oxime ligands
Ayvaz, Melekcol; Turan, Ibrahim; Dural, Bayram; Demir, Selim; Karaoglu, Kaan; Aliyazicioglu, Yuksel; Serbest, Kerim
Mn(II), Co(II), Ni(II), Cu(II), and Zn(II) transition metal complexes of 2-hydroxy-5-[(E)-(4-phenyl) diazenyl] benzaldehyde oxime and 2-hydroxy-5-[(E)-(4-nitrophenyl) diazenyl] benzaldehyde oxime ligands were synthesized and characterized through NMR, IR, ESI mass, and UV analysis. DNA binding abilities of the complexes were revealed using a UV-Vis spectrophotometer with the absorption titration and competitive binding techniques. Hydrolytic and oxidative DNA cleavage activities under different conditions were also proved. Topoisomerase I inhibition efficiencies and in vitro free radical scavenging activities of all complexes were examined. Finally, the selective cytotoxic potentials of all complexes were evaluated in human colon cancer, normal colon, and fibroblast cell lines using the water-soluble tetrazolium salt (WST-1) assay. The complexes had the ability to intercalate into stacked base pairs of DNA and topoisomerase I activity was reasonably inhibited in their presence in 0.4 mM concentrations. The abilities for scavenging of DPPH and hydroxyl radicals were found to be higher than those of known standard antioxidants (ascorbic acid, butylated hydroxyanisole, and mannitol). The results obtained from the cytotoxicity experiments are especially promising for further research, which must be carried out for the evaluation of the studied complexes as anticancer drugs.
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İncele - MakaleAçık Erişim2017Scopus SJRQ2Accumulation of phenolics in natural and micropropagated plantlets of Thymus pseudopulegioides Klokov & Des.-Shost. with their antioxidant potentials
Günaydin, Mustafa; Laghari, Abdul Hafeez; Bektas, Ersan; Sökmen, Munevver; Sökmen, Atalay
Thymus pseudopulegioides plantlets were propagated in vitro via direct organogenesis by using Murashige and Skoog (MS) media containing kinetin, thidiazuron, and 6-benzyladenine (BA) individually. Methanol extracts obtained both from plantlets and wild plants were analyzed for their total phenolics and flavonoid contents, then quantified by HPLC. The highest total phenolic (8.83 mg/g as gallic acid equivalent) and total flavonoid (0.92 mg/mL as rutin equivalent) values were from the MS media supplemented with 1.0 mg/L kinetin and 0.5 mg/L BA, respectively. The plantlets grown in those media also showed remarkable antioxidant activities with an IC50 value of 4.77 mu g/mL in DPPH and 100% inhibition in beta-carotene assays, respectively. HPLC analysis proved the production of protocatechuic, caffeic, vanillic, rosmarinic, ferulic, and o-coumaric acids and rutin. Rosmarinic acid production was predominant in natural samples (115.2 mg/100 g dry weight), while the aforesaid phenolic acids were prevalent in plantlets grown on MS media supplemented with KIN or BA at various concentrations. Rutin production was the highest (50.74 mg/100 g dry weight) in the plantlets grown on MS medium containing kinetin (1.0 mg/L). As an economically important chemical, rosmarinic acid was selected as the target chemical and a novel method was introduced to achieve its selective isolation.
AtıfScopus6WoS5OpenAlex9TR Dizin2İncele - MakaleYalnız künye2017Scopus SJRQ2Microindentation on the porous copper surface modulations
Ekmekci, Dursun; Yilmaz, Fikret; Kölemen, Ugur; Cora, Omer Necati
This study aimed to investigate the mechanical properties of a surface modulation which was realized through compaction, and then sintering of copper powders. To this goal, Berkovich type of indenter and depth-sensing indentation technique were used in microindentation to measure the hardness and modulus of elasticity values at different features of compact. Indentations were performed with a peak force of 50 mN. Hardness values were obtained in 0.88-1.12 GPa range while the modulus of elasticity was recorded in the 70-111 GPa interval. Even though both modulus of elasticity and hardness values were noted to be different for copper powders and substrate, one-way ANOVA analyses showed that the differences in both modulus of elasticity and hardness values are insignificant. FE modeling of microindentation was also performed and validated. It was shown that the force-displacement values obtained from FE analyses are quite well in agreement with the experimental data.
AtıfScopus4WoS5OpenAlex4İncele - MakaleYalnız künye2016A STUDY - CONCERNING THE SOLUTION PROCESS IN TURKEY-RELATED TO HOFSTEDE'S AVOIDANCE OF UNCERTAINTY IN THE CONTEXT OF CULTURAL DIMENCION BEFORE 7th JUNE 2015 PARLIAMENTARY ELECTION
Güllupünar, Hasan; Gümüsok, Seyfullah
An individual's attitudes and behaviours differ depending upon the circumstances in which it is located. In a significant environment in terms of cause and effect, the rational aspects of an individual's attitudes and behaviours dominate. Therefore, an affirmative perspective has control over the individual's attitudes and behaviours. But in the case of increased uncertainty in terms of cause and effect, radical tendency in an individual's attitudes and behaviours are increasing to avoid uncertainty. This case causes the parties diverging from each other in the matter of solutions for social problems. This study deals with the perception types related to the 'solution process 'that has been initiated for the solution of Kurdish issue in Turkey which is one of the most important problem since the foundation of Republic and the effects of these perception types on the future of solution process. For his purpose, a research has been carried out in Gumushane and Sirnak where different approaches are prevailing about the solution process. In the study with the simple random sampling method, 300 people in Sirnak and 250 people in Gumushane were included with face to face interview. The study, in which five types of perception about the solution process have been revealed, has concluded that those who have an affirmative perspective about the solution process support the continuation of this process and taking further steps about the issue. However, it is clearly seen that those who have concerns or negative perceptions regarding the solution process propose harder and strict actions related to the solution of Kurdish issue. Therefore, in perception types dominated by uncertainty, more radical tendency has been observed in the attitudes about the solution process.
- Derleme MakaleYalnız künye2016Scopus SJRQ3Characterization of the Combustion Parameters of Impregnated and Varnished Cedar Wood (Cedrus libani)
Fidan, M. Said; Yasar, S. Sadiye; Yasar, Mehmet; Atar, Musa; Alkan, Elif
The present study investigated the effect of various types of impregnating and surface treatment materials on the fire resistance of wood material indoors and outdoors. Wood samples (Cedrus libani A. Rich.) were impregnated with Wolmanit-CB or Tanalith-E according to ASTM D1413-76 (American Society for Testing and Materials 1976). The impregnated surface was treated with either synthetic or water-based outdoor varnish materials. The impregnated and varnished samples were left in outdoor conditions for 1 year. The combustion characteristics of the samples were investigated at the end of 1 year according to the combustion parameters detailed in the ASTM E160-50 (1975) combustion test. The results of this study indicated that the combustion parameters were lower in the 1-year-old samples (89.12% of control values), in the samples impregnated using Wolmanit-CB (89.18% of control values), and in samples treated using water-based varnish (88.43% of control values). The analysis of flue gas indicated that the O-2 content of the 1-year-old samples impregnated with Wolmanit-CB and treated with synthetic varnish was higher, whereas the CO content was lower. In conclusion, impregnated Wolmanit-CB specimens provide higher fire resistance.
AtıfWoS6OpenAlex4İncele - MakaleYalnız künye2016Disease and Death in the Modern Culture: On Now and Eternity
Demir, Sertac Timur
This paper is basically about nowism as a representation of modernity rather than a temporal fragment, about cancer as philosophical reference rather than as a biological illness, and about death as constructive value rather than as a destructive experience. All these representation-loaded concepts are dealt with through the story of Tessa, the protagonist in the film Now is Good (2012). In the liquid modernity, on the one hand nowist orientations, tendencies and acts are wryly reduced to a cliche: Carpe diem (seize the day) and on the other hand temporal uncertainty of death implies the essential principle of memento mori (remember you will die) or Mutu qabla an tamutu (die before you die). The now is, as a worldview beyond a temporality, not merely good, but perhaps the God of the modern society. However, deadly cancer, which is an uninvited guest, nullifies this modern doctrine that commercializes the now as eternity and immortality itself. Cancer that marks death and the sense of chaos what cancer stirs are antithesis and perhaps antidote of the liquid modernity. This paper, for the very reason, unexpectedly affirms death while criticising the nowist culture.
AtıfWoS2TR Dizin2İncele - MakaleYalnız künye2016The Concept of mas'ala in Islamic Jursiprudence
Yilmaz, Fetullah
The subject of this article is the concept of mas'ala (issue) in Islamic jurisprudence in terms of the logic of pre-modern science. Within this framework, formal structure and content of mas'ala and facts in which it consists, and some related subjects are dealt with in this paper. There are initial principles must be known before starting all science. The concept mas'ala is one of these. Mas'ala, which is a conclusion sentence aimed to be reached, consists of a topic and a verb. In fiqh, the topic of mas'ala is act of responsible, while its verb is religious decision. In addition to some questions about the topic of Islamic jurisprudential concerns, there are also some problems on its verb. Concerns in fiqh are separated into sections such as relevant area, generality, characteristic, clarity and obscurity. Apart from these matters, in this article, it is touched also on some contemporary approaches on the concept mas'ala.
AtıfTR Dizin1İncele - MakaleYalnız künye2016Saccharin as Substitute Goods in Ottoman State
Damlibag, Fatih
Constantin Fahlberg invented saccharin during the end of 1870's. Saccharin was a product that it has strong sweetening power. Potential to sugar substitute and support of German government were provided to enlarge its market rapidly. But due to its chemical origin, some medical concerns were shown towards this product. Some doctors thought that usage of saccharin caused health problems. Due to these medical concerns, many European governments banned or restricted the entrance of this product to their countries. Fahlberg thought that his product did not deserve these critiques. According to him, critiques were originated from shaken interests of sugar industry. Near to 1900's, saccharin also entered Ottoman market. Similarly, it was also criticized by Ottoman doctors. In front of this situation, approach of Ottoman State towards saccharin happened within three stages. In the first stage, Ottoman officials did not foresee a risky situation for the usage of saccharin as a substitute for sugar. Because saccharin is a chemical drug for diabetes disease and sugar prices were very convenient. As to second stage, critiques to saccharin were taken into account. High sugar prices of this period were caused some probable risks of food fraud according to officials. Additionally, medical studies of the period provided more information about probable risks of saccharin. As a result of this situation, Ottoman State applied quantitative restrictions in saccharin import. In addition, the product could be only brought by pharmacists. Third period of saccharin in Ottoman State happened within compelling conditions of World War I. After extreme increases in sugar prices; there was an excessive demand for illegal usage of saccharin, because sugar almost disappeared from market. In front of this situation, official permission was given to saccharin usage with some restrictions.
AtıfTR Dizin2İncele - MakaleYalnız künye2016Scopus SJRQ2Therotical investigation of the effects of diesel fuel, biodiesel fuel and their blends on internal combsution engines
Sezer, Ismet
In this study; the effects of diesel fuel, the soybean oil methyl ester (SOME) biodiesel fuel and their blends at various percentages on the spray and combustion characteristics and engine performance and exhaust emissions of diesel engines investigated as theoretically. For this purpose, a model has been built for a direct injection diesel engine in a commercial vehicle by the Diesel-RK software program that can be used liberally on the net. The obtained values for diesel (D) and biodiesel (BD) fuels and D-BD fuel blends via the constructed model were compared. The results of the study show that BD fuel generally provides a close brake thermal efficiency values to diesel fuel. Additionally, BD fuel causes decrements in engine power and particulate matter (PM-soot) emission and increments in specific fuel consumption and nitric oxides (NOx) emission. On the other hand, D-BD fuel blends at various blend ratios have usually given the spray, combustion, performance, and emission values between those of diesel and biodiesel fuels.
AtıfWoS9OpenAlex3TR Dizin7İncele - MakaleAçık Erişim2016New Communication Technologies, Local Journalism and the Perception of Locality
Özcan, Ali
Studies on local journalism as an important element of participatory democracy generally focus on the history of the local press, the financial insufficiencies of local newspapers as well as technical/technological incompetency that occurs as a result of these factors. This research analyzes local newspapers with a new scientific point of view by focusing on the perception of locality as a mental projection of geographical constraint. Perspectives regarding the transformations on perceptions of locality as a result of the disappearance of time and space constraints due to new communication technologies, and the opportunities that new communication environments offer to local newspapers will be provided. Moreover, the ways in which local newspapers reflect on locality with their printed versions under time and space constraints will be analyzed. The research scope of the study has been limited to 15 newspapers in Konya. Structured interviews and content analysis methods were used for data collection and analysis.
- MakaleYayıncıda açık erişim2016The Technical Construction of Personalities, its Social and Psychological Dimensions in The Novel The Day The Leader was Killed by Naguib Mahfouz
Alahmad, Mohamad
This research deal with the introduction of the characters, and its social and psychological dimensions in the novel The Day the leader was killed of the Najeeb Mehfooz, because character has central importance in the narrative process on the one hand, so it is the foundation of the novel, And conscious force which revolve narrating elements are all in its orbit, and the solely element that intersect with it all these elements, and with a view to shed light on the methods and sources of narration, which are invested the novelist with wide experience in the construction and its presentation to benefit the reader on other hand. In order to this character should be viable in the imagination of the reader, it's necessary to know the social level and the associated financial state, social class and the level of knowledge etc, and to find out the psychological level and the associated sense of satisfaction or exasperation or accept or reject or hatred or rancor or other things in the society of the novelist in which that character is living. The research contains on the nine headings: Introduction, Abstract, Types of the character in this novel, Methods of building characters, Linguistically symbols for that, Social and Psychological dimension of the characters, Critical analysis, conclusion, and general result of the study, and then bibliography.
- MakaleYalnız künye2016Scopus SJRQ2Assessment of Left Atrial Mechanics in Patients with Preexcitation Syndrome Scheduled for Catheter Ablation
Karakoyun, Suleyman; Tanboga, Ibrahim Halil; Gökdeniz, Tayyar; Lazoglu, Zakir; Topçu, Selim; Karal, Huseyin; Aksakal, Enbiya; Sevimli, Serdar
ObjectivesWe aimed to test the left atrial (LA) mechanics and contraction synchrony by 2D strain imaging, in patients with Wolff-Parkinson-White (WPW) syndrome, before and after radiofrequency catheter ablation (RFCA). MethodsStudy population consisted of 25 patients with WPW scheduled for RFCA and 30 healthy controls. The peak LA strain at the end of the ventricular systole (LAs strain) and the LA strain with LA contraction (LAa Strain) were obtained. To assess LA dyssynchrony, septal versus lateral wall time-to-peak strain measurements were measured. ResultsThere was no difference between the patients with WPW and control subjects with regard to peak LAs and LAa strain. Patients with WPW demonstrated higher global time-to-peak LAs and LAa strain values compared with the control group. Peak LAs strain and LAa strain values, measured before and after the RF ablation of the accessory pathway, were comparable (34.33.92 vs. 34.6 +/- 3.2, P=0.816, 14.7 +/- 2.8 vs. 15.3 +/- 2.3, P=0.052, respectively). Global time-to-peak LAs and LAa strain measurements were significantly shorter after the RFCA compared with the values obtained before the RFCA. However, septo-lateral times to peak LA strain differences were found to be comparable in both WPW versus control and pre- versus postablation groups. ConclusionLA mechanical function assessed by 2D strain imaging was comparable between patients with WPW and control subjects. Patients with WPW had more prominent LA dyssynchrony during atrial pump phase as compared with the controls, a condition which could not improve after successful elimination of the accessory pathway by RFCA.
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İncele - MakaleAçık Erişim2016Scopus SJRQ2Mechanical Bowel Preparation Does Not Affect Anastomosis Healing in an Experimental Rat Model
Piroglu, Isilay; Tulgar, Serkan; Thomas, David Terence; Cakiroglu, Basri; Piroglu, Mustafa Devrim; Bozkurt, Yasin; Gergerli, Ruken; Ates, Nagihan Gozde
Background: Mechanical bowel preparation before colorectal surgery is commonly performed, but its benefits are controversial. The aim of this study was to compare the effects of mechanical bowel preparation on healing of colonic anastomosis and tissue strength. Material/Methods: After institutional review board approval, 20 adult Wistar albino rats were randomly divided into 2 groups of 10 animals each. Mechanical bowel preparation including sodium phosphate was performed on the experimental group via a feeding tube, whereas no bowel preparation procedures were performed on the control group. Transverse colon resection and anastomosis were performed on all rats under general anaesthesia. On postoperative day 5, re-laparotomy was performed and the anastomotic areas were resected. Animals were killed, after which bursting pressure and tissue hydroxyproline concentrations were measured, histopathological examination was performed, and we evaluated and compared the results. Results: There were no differences between control and experimental groups in bursting pressure, tissue hydroxyproline concentrations, or histopathological examination results (P>0.05). Conclusions: Our study demonstrated no significant difference between bursting pressures, tissue hydroxyproline levels, or modified wound healing score at postoperative day 5 between rats undergoing and not undergoing mechanical bowel preparation. Mechanical bowel preparation is not essential for healing or strength of colonic anastomosis in rats.
AtıfWoS5İncele - MakaleYalnız künye2016Scopus SJRQ1Abnormal white matter integrity as a structural endophenotype for bipolar disorder
Sariçiçek, A.; Zorlu, N.; Yalin, N.; Hidiroglu, C.; Çavusoglu, B.; Ceylan, D.; Ada, E.; Tunca, Z.; Özerdem, A.
Background. Several lines of evidence suggest that bipolar disorder (BD) is associated with white matter (WM) pathology. Investigation of unaffected first-degree relatives of BD patients may help to distinguish structural biomarkers of genetic risk without the confounding effects of burden of illness, medication or clinical state. In the present study, we applied tract-based spatial statistics to study WM changes in patients with BD, unaffected siblings and controls. Method. A total of 27 euthymic patients with BD type I, 20 unaffected siblings of bipolar patients and 29 healthy controls who did not have any current or past diagnosis of Axis I psychiatric disorders were enrolled in the study. Results. Fractional anisotropy (FA) was significantly lower in BD patients than in the control group in the corpus callosum, fornix, bilateral superior longitudinal fasciculus, inferior longitudinal fasciculus, inferior fronto-occipital fasciculus, anterior thalamic radiation, posterior thalamic radiation, cingulum, uncinate fasciculus, superior corona radiata, anterior corona radiata and left external capsule. In region-of-interest (ROI) analyses, we found that both unaffected siblings and bipolar patients had significantly reduced FA in the left posterior thalamic radiation, the left sagittal stratum, and the fornix compared with healthy controls. Average FA for unaffected siblings was intermediate between the healthy controls and bipolar patients within these ROIs. Conclusions. Decreased FA in the fornix, left posterior thalamic radiation and left sagittal stratum in both bipolar patients and unaffected siblings may represent a potential structural endophenotype or a trait-based marker for BD.
AtıfWoS45İncele - MakaleAçık Erişim2016Scopus SJRQ4Ultrasonographic assessment of the shoulder in patients with carpal tunnel syndrome
Mansiz Kaplan, Basak; Yagci, Ilker; Akdeniz Leblebicier, Merve
Objectives: To detect the causes of shoulder pain with shoulder ultrasonography in patients with carpal tunnel syndrome (CTS) and compare the findings of the patients with CTS to healthy controls. Patients and Methods: Patients with CTS and healthy controls were evaluated clinically, electrophysiologically. and ultrasonographically by three masked researchers. Electrophysiological assessment consisted median and ulnar nerve conduction studies (NCS). In ultrasonographic assessment, cross-sectional areas of the median nerve were measured at hamatum hook, psiform bone, radio-ulnar joint levels. Shoulder joint, axial and longitudinal biceps tendon, subscapularis tendon, supraspinatus tendon, infraspinatus tendon, rotator cuff, acromioclavicular joint were evaluated by a standardized protocol. Results: The study was completed with 30 patients with CTS and 30 healthy subjects. The presence of shoulder pain in the last week was 53.3% in the CTS group and 30% in the control group but there was no statistically significant difference between the groups (p=0.16; p>0.05). Subdeltoid bursitis was significantly more common in CTS group when compared to the control group (p=0.03) in ultrasonographic assessment, and there was no significant difference between the two groups for other parameters. Conclusion: Shoulder pain and subdeltoid bursitis were common in patients with CTS however, shoulder pain was not directly related to shoulder problems alone. Central sensitization may play a role for shoulder pain rather than shoulder problems.
AtıfWoS1OpenAlex1İncele - MakaleYalnız künye2016Scopus SJRQ1Retrofitting Effect on the Dynamic Properties of Model-Arch Dam with and without Reservoir Water Using Ambient-Vibration Test Methods
Altunisik, Ahmet Can; Günaydin, Murat; Sevim, Baris; Bayraktar, Alemdar; Adanur, Suleyman
Continuous health monitoring and regular condition assessment is of vital importance for engineering structures in general and especially for arch dams. These structures can be exposed to many different loads such as earthquake, blast, wind, ice, and water pressure, which may cause deterioration and loss of structural integrity. Such development may have severe economic consequence and, more importantly, may present a serious risk to public safety. Therefore, the structural behavior of arch dams must be monitored at regular intervals during their service life, although the overall failure rate of these dams is around 1%. Experimental measurements by ambient vibration test methods are among the most commonly preferred inspection techniques for the evaluation of structural performance and safety. The aim of this research is to examine the retrofitting effect on the dynamic properties of a damaged arch dam model, with and without reservoir water, after retrofitting with high-strength structural repair mortar and carbon fiber reinforced polymer composite material. To this end, an arch dam-reservoir-foundation model was built. In the study, ambient vibration tests were carried out for three test-cases to determine changes in dynamic properties, such as natural frequency, mode shape, and damping ratio before and after retrofitting. The three cases were (1)a severely damaged dam with full reservoir (Case-A), (2)a repaired dam with full reservoir (Case-B), and (3)a strengthened dam with full reservoir (Case-C). In addition, all the measurement tests were repeated with an empty reservoir to extract the effect of water. Data for the ambient vibration tests were gathered from the dam body during vibrations by natural excitations. These excitations were provided through small impacts, and the response signals were measured by sensitivity accelerometers placed at the crest points. To obtain the experimental dynamic properties, the enhanced frequency domain decomposition method in the frequency domain was used. Comparisons of experimentally identified dynamic properties for the damaged and the retrofitted dam showed that the retrofitting application affected the structural behavior of the arch dam considerably. It was very effective in restoring the structure's original dynamic properties.
AtıfWoS18OpenAlex19İncele - MakaleYalnız künye2016Scopus SJRQ2Dynamic Characteristics of an Arch Dam Model before and after Strengthening with Consideration of Reservoir Water
Altunisik, Ahmet Can; Günaydin, Murat; Sevim, Baris; Bayraktar, Alemdar; Adanur, Suleyman
This technical note presents an investigation about the changing of dynamic characteristics of an arch dam model before and after strengthening considering reservoir water. To this end, an arch dam-reservoir-foundation model has been constructed in the laboratory. Ambient vibration tests have been performed on the damaged and strengthened arch dam models for empty and full reservoir to determine the effect of water on the dynamics characteristics. Enhanced frequency domain decomposition method has been used to extract the dynamic characteristics. Finally, the dynamic characteristics obtained from the damaged and strengthened dam models have been compared to with each other. Also, the natural frequencies for damaged and strengthened models are compared to detect the effect of strengthening application on the frequencies. Results indicate that the natural frequencies and damping ratios are changed with the full reservoir. However, mode shapes are not changed. Results also show that the natural frequencies of damaged dam considerably increase after strengthening applications.
AtıfWoS15OpenAlex15İncele - MakaleYalnız künye2016Preparing Forest Management Plans With Spatial Simulation Model
Kadiogullari, Ali Ihsan; Keles, Sedat; Baskent, Emin Zeki; Bingöl, Ozkan
This manuscript presents a simulation-based spatial forest management planning model developed for ecosystem-based multiple use forest planning approach. The general framework of the simulation model was firstly introduced. It was then implemented in a typical forest management planning unit. Four forest management planning scenarios including nonspatial and spatial characteristics were developed. These scenarios were compared in the context of different forest performance indicators (such as allowable cut, growing stock, net carbon sequestration, age-class distribution at the end of the simulation). When compared the simulation-based forest management planning scenarios, it was found that there were no significant changes in timber production levels among scenarios. On the other hand, spatial forest management scenarios controlled forest ecosystem structure and produced more applicable forest management plans.
- MakaleAçık Erişim2016Lighter Ingestion as an Uncommon Cause of Severe Vomiting in a Schizophrenia Patient
Atayan, Yahya; Cagin, Yasir Furkan; Erdogan, Mehmet Ali; Bilgic, Yilmaz; Bestas, Remzi; Harputluoglu, Murat; Seckin, Yuksel
Background. Foreign bodies in the gastrointestinal tract are important morbid and mortal clinical conditions. Particularly, emergency treatment is required for cutting and drilling bodies. The majority of ingested foreign bodies (80-90%) leave gastrointestinal tract without creating problems. In 10-20% of cases, intervention is absolutely required. Less than 1% of cases need surgery. In this paper, we present a schizophrenia patient who swallowed multiple lighters. Case. A 21-year-old male schizophrenic patient who uses psychotic drugs presented to the emergency department with the complaints of abdominal pain, severe vomiting, and inability to swallow for a week. His physical examination revealed epigastric tenderness. A plain radiograph of the abdomen revealed multiple tiny metallic densities. Gastroscopy was performed. The lighters were not allowing the passage, and some of them had penetrated the gastric mucosa, and bezoars were observed. One lighter was extracted with the help of the polypectomy snare. Other lighters as a bezoar were removed by surgery. Conclusion. Excessive vomiting of swallowed foreign bodies in the etiology of psychotic patients should be kept in mind. Endoscopic therapy can be performed in the early stages in these patients, but in the late stage surgery is inevitable.
AtıfWoS2OpenAlex2İncele