Sürdürülebilir Kalkınma Amaçları
Yazarlar
- Dertli, Enes(114)
- Kaya, Yunus(48)
- Şahin, Engin(48)
- İspirli, Hümeyra(47)
- Özen, Soner(38)
- Şenay, Volkan(37)
- Pat, Suat(36)
- Kutlu, Naciye(32)
- Artar, Musa(31)
- Can, Zehra(31)
- Korkmaz, Şadan(31)
- Yilmaz, Mustafa Tahsin(31)
- Öner, Erdal(31)
- Bayram, Sinan(30)
- Cuce, Erdem(30)
- Ertugrul, Mehmet(29)
- Hasar, Ugur Cem(29)
- Ecem Bayram, Nesrin(28)
- Mercan, Emin(28)
- Ayata, Ümit(27)
- Bayraktar, Bülent(27)
- Çolak, Murat(23)
- Özdemir, Akın(23)
- Ayazoglu, Rabil(22)
- Cuce, Pinar Mert(22)
- Sert, Durmuş(22)
- Bayram, Ozkan(21)
- Kamiloğlu, Aybike(21)
- Dirican, Ebubekir(20)
- Kadakal, Mahir(20)
- Abdioglu, Murat(19)
- Birinci, Ahmet(19)
- Tozlu, Alperen(19)
- Gerçek, Yusuf Can(18)
- Taylan, Osman(18)
- Cinar, Mehmet(17)
- Gul, Volkan(16)
- Hasar, Ugur C.(16)
- Kadakal, Huriye(16)
- Kara, Yakup(16)
Yayınlar
- MakaleAçık Erişim2023Scopus SJRQ2Evaluation of the Association of VDR rs2228570 Polymorphism with Elite Track and Field Athletes' Competitive Performance
Bulgay, Celal; Bayraktar, Isik; Kazan, Hasan Huseyin; Yildirim, Damla Selin; Zorba, Erdal; Akman, Onur; Ergun, Mehmet Ali; Cerit, Mesut; Ulucan, Korkut; Eken, Ozgur
The present study aimed to examine the vitamin D receptor (VDR), rs2228570 polymorphism, and its effect on elite athletes' performance. A total of 60 elite athletes (31 sprint/power and 29 endurance) and 20 control/ physically inactive, aged 18-35, voluntarily participated in the study. The International Association of Athletics Federations (IAAF) score scale was used to determine the performance levels of the athletes' personal best (PB). Whole exome sequencing (WES) was performed by the genomic DNA isolated from the peripheral blood of the participants. Sports type, sex, and competitive performance were chosen as the parameters to compare within and between the groups by linear regression models. The results showed no statistically significant difference between the CC, TC, and TT genotypes within and between the groups (p > 0.05). Additionally, our results underlined that there were no statistically significant differences for the association of rs2228570 polymorphism with PBs within the groups of the (p > 0.05) athletes. The genetic profile in the selected gene was similar in elite endurance, sprint athletes, and in controls, suggesting that rs2228570 polymorphism does not determine competitive performance in the analyzed athlete cohort.
AtıfScopus11WoS10OpenAlex15
İncele - MakaleAçık Erişim2023Scopus SJRQ1Reproductive Effects of S. boulardii on Sub-Chronic Acetamiprid and Imidacloprid Toxicity in Male Rats
Sevim, Cigdem; Akpinar, Erol; Aksu, Emrah Hicazi; Ömür, Ali Dogan; Yildirim, Serkan; Kara, Mehtap; Bolat, Ismail; Tsatsakis, Aristides; Mesnage, Robin; Golokhvast, Kirill S. S.
The potential health-promoting effects of probiotics against intoxication by pesticides is a topic of increasing commercial interest with limited scientific evidence. In this study, we aimed to investigate the positive effects of probiotic Saccharomyces boulardii on the male reproductive system under low dose neonicotinoid pesticide exposure conditions. We observed that acetamiprid and imidacloprid caused a degeneration and necrosis of the spermatocytes in the tubular wall, a severe edema of the intertubular region and a hyperemia. This was concomittant to increased levels of 8-hydroxy-2 '-deoxyguanosine reflecting oxidative stress, and an increase in caspase 3 expression, reflecting apoptosis. According to our results, Saccharomyces boulardii supplementation mitigates these toxic effects. Further in vivo and clinical studies are needed to clarify the molecular mechanisms of protection. Altogether, our study reinforces the burden of evidence from emerging studies linking the composition of the gut microbiome to the function of the reproductive system.
AtıfScopus20WoS19OpenAlex24İncele - MakaleAçık Erişim2023Scopus SJRQ3Relationship of progranulin response with some physio-biochemical parameters in Akkaraman sheep
Bayraktar, Buelent; Tekce, Emre; Genç, Murat; Kaya, Hacer; Özcan, Gulbahar Boyuk; Aydemir, Seyma; Kotan, Goksad Cemil; Takma, Cigdem; Ürüsan, Hilal; Aksakal, Vecihi
Progranulin (PGRN) is a multifunctional protein that is critical in the retention of embryos in the endometrium of the uterus and the protection of cervical tissue during fetal growth. In case of PGRN release and dysfunction, cervical tissue may remodel (regeneration) and lead to the risk of abortion. Serum PGRN level in sheep and its variation according to different physiological periods and its relationship with some biochemical parameters are unknown. In this study, the relationship between early lactation, early and late pregnancy serum PGRN levels and some biochemical parameters in Akkaraman sheep was investigated for the first time. In the literature search, no similar studies were found on the relationship between early lactation, early and late pregnancy serum PGRN levels and some biochemical parameters in Akkaraman sheep. The research was carried out on 90 Akkaraman sheep reared in the same herd under the same care and feeding conditions. In the study, Akkaraman ewe were divided into 3 groups as early lactation, early pregnancy and late pregnancy. 1st group is early lactation period ewe (first 60 days of lactation), (n = 30), 2nd group is in the first period of pregnancy (on the 0-90th day of the first pregnancy (n = 30)), 3rd group is in the late pregnancy of pregnancy (100-150 days of pregnancy (n = 30)) was created. Blood samples from vena jugularis were taken before morning feeding from the animals that formed the study groups. PGRN levels in serum were determined by ELISA method. In addition, glucose, calcium (Ca), magnesium (Mg), phosphorus (P), total cholesterol (TC), triglyceride (TG), low density lipoprotein (LDL), high density lipoprotein (HDL), very low density lipoprotein (VLDL) levels were analyzed in biochemistry autoanalyzer. As a result of the study, lactation and early pregnancy and late pregnancy mean serum PGRN levels were determined as 1.93, 1.78, 1.33 ng mL-1, respectively. The serum PGRN, glucose, Ca, Mg, P, TC, TG, LDL, HDL and VLDL levels of sheep with late pregnancy, early lactation and early pregnancy periods, which constitute the study groups, were found to be statistically significant (P<0.05). Our results have shown that due to the physiological role of PRGN in keeping the embryo in the endometrium of the uterine and in preserving the cervical tissue during fetal growth, there may be a useful parameter in the pursuit of the pregnancy process.
AtıfScopus4WoS4OpenAlex3İncele - MakaleYalnız künye2023Scopus SJRQ1Bulk MgB2 superconductor for levitation applications fabricated with boron processed by different routes
Savaskan, B.; Ozturk, U. K.; Guner, S. B.; Abdioglu, M.; Bahadir, M. V.; Acar, S.; Somer, M.; Ionescu, A. M.; Locovei, C.; Enculescu, M.
Bulk MgB2 discs were prepared by an in situ route from mixtures of magnesium and boron powders. The boron powders were produced by two methods. The first one consisted of a self-propagating high tem-perature magnesiothermic synthesis (SHS) process followed by acid and fluorine cleaning and a heat treatment in inert atmosphere. This approach produced boron with purities between 86 % and 97 %, where the main impurity was Mg. Depending on the final heat treatment, these boron powders were amorphous or crystalline. In the second route, high purity nano powders (99 %) of boron were obtained by a diborane pyrolysis process. Bulks of MgB2 were characterized by structural, microstructural, and magnetic mea-surements. Critical current density, pinning force aspects and levitation force (including guiding force) details were assessed. Amorphous lower purity boron (86-97 %) obtained by the first processing route was found to promote the largest levitation forces of the MgB2 bulks and, among these samples, the best le-vitation results were recorded when using boron with a purity of 95-97 %. Use of a lower purity boron that decreases the cost of MgB2 promotes large scale production at industrial level of bulk MgB2 super-conducting magnets for levitation applications and enhances the applicability potential of MgB2 super-conductor. The relationship between levitation force and specific features of the samples such as pinning force details are discussed.& COPY; 2023 Elsevier B.V. All rights reserved.
AtıfScopus10WoS10OpenAlex12İncele - MakaleYalnız künye2023Scopus SJRQ1Temporal Reflection Response of Plane Waves Within an N-Layer Structure Involving Bianisotropy
Hasar, Ugur C.; Ozturk, Gokhan; Kaya, Yunus; Barroso, Joaquim Jose; Ertugrul, Mehmet; Ramahi, Omar M.; Alfaqawi, Mona S. S.
The temporal reflection response of an N-layer composite structure involving bianisotropic behavior is examined for the first time in the literature. Toward this goal, the wave matrix (WM) method, which is fundamental, relatively easier to apply, and compact and iterative suitable for analysis of multilayer structures, is first extended to the analysis of an interface separating two different media involving bianisotropy. Next, the reflection response of the whole structure is derived in terms of series form to better analyze its temporal behavior. Then, frequency-domain and time-domain responses of the whole structure are expressed using a special reflection coefficient (the reduced reflection coefficient) by way of the concept of subregions. A numerical analysis is performed to demonstrate the applicability of our formalism for two different polarization types (perpendicular and parallel).
AtıfScopus3WoS3OpenAlex3İncele - MakaleYayıncıda açık erişim2023Scopus SJRQ3Investigation of endocrine response of thyroid and intestinal and adipose tissues due to the addition of Moringa oleifera essential oil in diet for quails exposed to heat stress
Bayraktar, Bulent; Tekce, Emre; Bayraktar, Sevil; Böyük, Gulbahar; Takma, Cigdem; Aksakal, Vecihi; Genç, Murat; Kaya, Hacer; Ülker, Ufuk; Gürbüz, Ahmet Burak
-In this study, we aimed to determine the effect of Moringa oleifera essential oil (MOEO) supplementation to rations of Japanese quail (Coturnix coturnix japonica) grown under heat stress (HS) on some adipokine (visfatin, adiponectin, and chemerin), intestinal (citrulline), 3,5,3 '-triiodothyronine (T3), thyroxine (T4), and thyroid-stimulation hormone (TSH) levels in the serum. For this purpose, 320 day-old male quail chicks were used. The study was conducted over 42 days, including a 7-d adaptation period and a 35-d experimental period. Eight trial groups were established, each including 10 quail: CT (control temperature, 25 celcius), MOEO 200, MOEO 400, MOEO 600, HSC (HS control), SMOEO 200, SMOEO 400, and SMOEO 600. Based on the results, a dose-dependent decrease was observed on days 21 and 42 in serum adiponectin and T3 in the stress and stress-free groups compared with the control group due to MOEO supplementation. The lowest decrease was observed in the MOEO 600 mg/kg dose group. In addition, an increase in stressed groups was observed when examining serum citrulline levels, while chemerin levels did not have a statistically significant effect. While the decrease in serum visfatin, T4, and TSH levels on the 21st day did not have a statistically significant effect, a significant effect was determined on the 42nd day. The addition of MOEO at 600 mg/kg to the ration may be beneficial in preventing intestinal damage and inflammation that may occur due to HS.
AtıfScopus14WoS15OpenAlex19İncele - MakaleYalnız künye2023Scopus SJRQ1Extraction Method for Unique Determination of Complex Permittivity From Graphical Analysis of Natural Frequencies
Hasar, Ugur C.; Ozturk, Gokhan; Kaya, Yunus; Alfaqawi, Mona S. S.; Barroso, Joaquim Jose; Ertugrul, Mehmet; Ramahi, Omar M.
A time-domain free-space extraction procedure is proposed to uniquely determine the relative complex permittivity epsilon(r)(omega) based on two sets of natural frequencies of the metal- and air-backed dielectric samples. A graphical analysis is applied for evaluating whether unique epsilon(r)(omega) can be extracted using such natural frequencies. The method is numerically validated using two dielectric samples with different epsilon(omega) for the ideal case (no noise) and under the influence of noise with different signal-to-noise ratios (SNRs).
AtıfScopus1OpenAlex1İncele - Derleme MakaleYalnız künye2023Scopus SJRQ1Nanomaterial and fiber-reinforced sustainable geopolymers: A systematic critical review
Ünal, M. T.; Gökçe, H. S.; Ayough, P.; Alnahhal, A. M.; Simsek, O.; Nehdi, M. L.
Global cement production is associated with a colossal environmental footprint due to its considerable carbon emissions, energy consumption, depletion of natural resources, and waste accumulation. Geopolymer based concretes (GCs) have emerged as revolutionary alternatives to ordinary Portland cement concrete with enormous potential ecological benefits. However, they suffer from deficiencies, such as their brittle behavior under flexural and tensile loads. Using different types of fiber reinforcement and nanomaterial additions in geopolymer composites (GCs) has recently gained considerable attention to enhance various engineering properties, improve crack resistance, toughness, and ductility of the geopolymer matrices. This systematic and critical review analyses the effects of different reinforcing fibers and nanomaterials on the compressive and tensile strengths, modulus of elasticity, and impact resistance of GCs, and highlights the associated microstructural features. It is shown that carbon, basalt, and steel fibers can impart considerable improvement in mechanical strength, modulus of elasticity, and impact resistance of GCs. Furthermore, the introduction of polyethylene fibers has been shown to induce complex cracking behaviors, thereby contributing to the strain-hardening capability of geopolymer matrices. The integration of nanomaterials into GCs has emerged as a powerful strategy for achieving substantial enhancements in mechanical performance. Optimal nanomaterial dosages, typically around 2%, have been identified, with the specific surface area of nanoparticles proving to be a crucial determinant of the resulting mechanical properties. Notably, nano-silica has exhibited pronounced macro-scale reinforcement effects, whereas nano-titanium has displayed the potential to significantly enhance gel micromechanical characteristics. Additionally, synergistic combinations of nanomaterials and fiber reinforcements have led to the development of novel and distinctive mechanical properties within GCs. The synthesis of these findings underscores current best practices, highlights areas requiring further investigation, and emphasizes the need for concerted research efforts to advance the knowledge and implementation of sustainable geopolymers. This review offers a comprehensive analysis of the effects of fiber reinforcements and nanomaterials on geopolymer composites, providing valuable insights for researchers and practitioners.
AtıfScopus43WoS37İncele - MakaleAçık Erişim2022CYB mtDNA mutations and expression status of genes in the PI3K/AKT/mTOR signaling pathway in patients with schizophrenia
Dirican, Ebubekir; Uzunçakmak, Sevgi Karabulut; Özcan, Halil
Purpose: This study aimed to screen for cytochrome b (CYB) mitochondrial DNA (mtDNA) mutations and analyze the mRNA expressions of genes in the PI3K/AKT/mTOR signaling pathway in patients with schizophrenia. Materials and Methods: In this study, whole blood was obtained from 44 schizophrenic patients and 41 healthy individuals for DNA (patients) and RNA (patients and control) isolation. Samples for CYB mtDNA mutations were amplified by PCR and identified by Sanger DNA sequencing. RT-PCR and 2- increment increment Ct method was used for mRNA expression of PIK3CA, AKT1, and mTOR genes. Results: In schizophrenia patients, m.15326 A > G (43/44), m.15452 C > A (5/44), m.15078 A > G (3/44), m.14872 C > T (3/44) and m.14798 T > C (3/44) was the most common CYB mtDNA mutations. In silico analysis showed that some of the mutations were associated with the harmful, disease-causing or benign character. The mRNA expression of the PIK3CA, AKT1, and mTOR genes in schizophrenia patients was significantly higher than in healthy individuals. There was a significant moderate positive correlation between the PIK3CA and AKT1 genes. In addition, by ROC analysis, PIK3CA, AKT1 and mTOR genes were found to have good diagnostic power in the patient group. ROC analyzes showed that PIK3CA in particular has significant diagnostic value for schizophrenia patients with 80% sensitivity and 63.4% specificity. Conclusion: Both of CYB mtDNA mutations frequency and PIK3CA, AKT1 and mTOR mRNA expression were higher in schizophrenic patients compared to healthy individuals. We believe that studying these mechanisms in
AtıfWoS1OpenAlex1TR Dizin1
İncele - MakaleAçık Erişim2022Impact of gossypin on gene expression of HSP60 and HSP70 in different cancer cell lines
Dirican, Ebubekir; Çinar, Trfan
Purpose: The aim of this study is to evaluate the impact of gossypin on the expression level of heat shock proteins (HSPs) genes in different cancer cells. Materials and Methods: Cells were grown under standard culture conditions. Cancer cells were treated with different concentrations (5-100 mu g/ml) of gossypin and cisplatin (50 mu M) as positive control. Cell viability and effective dose range (5-100 mu g/ml) of gossypin were determined by MTT at 24, 48 and 72 hours. After RNA isolation and cDNA synthesis, HSP60 and HSP70 gene expression levels were analyzed using RT-PCR. For gene expression analysis, the 2-(Delta Delta ct) method was used. Results: According to the Mil results, 25-50-100 mu g/ml of gossypin doses were found effective on HSP60 and HSP70 gene expression levels in the cancer cell lines. Gossypin affected with dose-dependently the expression of HSP60 and HSP70 in the three cell lines. In the three cell lines, 50 mu g/ml and 100 mu g/ml of gossypin doses significantly reduced the expression of HSP60 and HSP70 compared to control group. Conclusion: Our results strongly supported the anticarcinogenic effect of gossypin at various doses in different cell lines. However, we believe that further in vivo research and human studies are needed. Our findings suggest that gossypin could be suitable candidate agent for further investigation to develop new strategies for the prevention and/or treatment of different cancer types.
AtıfWoS1OpenAlex2İncele - MakaleYalnız künye2022Scopus SJRQ3Comparative Analysis of Migrant Integration Policies of Turkiye and Selected Countries
Ustabulut, Mete Yusuf; Boylu, Emrah; Basar, Umut
Turkiye's migrant integration policy, which is one of the most migration-receiving countries in the Middle East owing to regional conflicts during the 2000s, is assessed alongside that of other receiving nations in the Migrant Integration Policy Index (MIPEX). These index ranks nations in eight key categories: labor market mobility, family reunion, education, health, political participation, permanent residence, access to nationality, and anti-discrimination. This study examines Turkiye's change in migration policy ratings by comparing the index 2015 and 2020 with six European countries (Germany, Belgium, France, Norway, Finland, Sweden). It is found that there was a significant disparity in index scores between Turkiye and these European countries in the 2015 MIPEX report; however, this difference has narrowed in the 2020 report. Turkiye's migrant integration policy rankings have improved substantially (+17), according to the 2020 report. As a result, Turkiye's policy indicator has increased from slightly unfavourable to halfway favourable . Although this score and increase are not at the desired level, they may indicate comprehensive improvements in Turkiye's integration policies in the following report.
- MakaleAçık Erişim2022Investigation of the effect of gossypin on MMP-2 and MMP- 9 genes in prostate cancer cells
Dirican, Ebubekir; Çinar, Irfan
Purpose: The aim of this study is to explore the effects of gossypin on matrix metalloproteinases -2 (MMP-2) and MMP-9 genes in prostate cancer cells. Materials and Methods: PC3 cells were grown in culture and treated with three different concentrations of gossypin (25-50-100 mu g/ml) and cisplatin (50 mu M) as a positive control. First, RNA isolation was performed. Then, cDNA synthesis was performed and RT-PCR was used to evaluate mRNA expression levels of MMP-2 and MMP-9 genes. Results: Gossypin decreased MMP-2 and MMP-9 mRNA expression in prostate cancer cells in a concentrationdependent manner. Three concentrations (25-50-100 mu g/ml) of gossypin in PC3 cells reduced the mRNA expression of the MMP-2 gene. While the fold change value of MMP-2 gene expression was 0.3482 +/- 0.040 in the 100 mu g/ml gossypin group, it was 1.007 +/- 0.1425 in the control group. In addition, 50 mu g/ml and 100 mu g/ml concentrations of gossypin decreased the mRNA expression of the MMP-9 gene. The expression level of the MMP-9 gene in prostate cancer cells was 0.4740 +/- 0.038 in the 100 mu g/ml gossypin administered group, while it was 1.009 +/- 0.1687 in the control group. There was a positive correlation between the expressions of the MMP-2 and MMP-9 genes. Conclusion: According to the results obtained, it is seen that gossypin reduces the expression of MMP-2 and MMP9 genes in prostate cancer cells and the effects of gossypin on other genetic and epigenetic mechanisms in cancer need to be investigated to reveal the anti-cancer.
AtıfWoS2OpenAlex2TR Dizin1İncele - MakaleAçık Erişim2022Exploring Problem Areas of Elderly Patients with Diabetes and the Support Provided by Their Family
Dastan, Buket; Hintistan, Sevilay
Objective: Diabetes increases problems in emotional areas particularly among the elderly patients by aggravating negative emotions such as loss, anxiety and fear and makes these patients need higher level of family support. This study aims at exploring problematic areas of the elderly diabetic patients and their family support levels. Methods: The data of this descriptive study were collected by the researcher by conducting a face to face interview with 218 elderly diabetic patients who presented to Endocrine Polyclinics of State Hospital between October 2015 and October 2016. To collect the data, Patient Information Form, Problem Areas in Diabetes Scale (PAID) and Hensarling's Diabetes Family Support Scale (HDFSS) were used. Results: Although problem areas among the patients were found to be fewer than expected; it was found that there were significant differences between problem areas and sex, diabetes time, treatment type, length of oral antidiabetic medicine use and insulin use, development of diabetes-related complication and hospitalization due to these complications in the recent year (p<0.05). Besides, the family support levels of the elderly patients were below the moderate level, and the number of individuals the patients live together with, the number of people receiving support due to diabetes and the number of people who received support from their spouses because of diabetes was a significant variable that affected HDFSS total score and the subscale scores (p<0.05). Conclusion: For a better diabetes management, sex and diabetes related variables should be taken into consideration while delivering health services and increasing family support levels can make positive contributions to the mood of the elderly patients.
AtıfWoS1OpenAlex1İncele - MakaleAçık Erişim2022Scopus SJRQ3DETERMINATION OF PARAMETERS AFFECTING KINETIC AND THERMODYNAMIC VALUES FOR LEAD REMOVAL USING WASTEWATER TREATMENT PLANT SEWAGE SLUDGE ASH
Irdemez, Sahset; Yesilyurt, Duygu; Torun, Fatma Ekmekyapar; Kul, Sinan
In this study, treatment of lead containing wastewater using sewage sludge ash obtained from the incineration unit in the domestic wastewater treatment plant in Gaziantep province in Turkey was investigated. The main purpose of the study is to determine the potential of using the treatment sludge ash, which comes out as waste in the treatment plant, in the treatment of wastewater of another industry. As a result of this study, the most suitable adsorption conditions were determined and focused on the kinetics of adsorption. In the experiments, the lead adsorption capacity of sewage sludge ash was determined as 122 mg g-1 at 0.5 g L-1 adsorbent concentration in wastewater containing 100 mg L-1 Pb2+under optimum conditions. As a result of the research, it was determined that the adsorption reaction proceeds according to the pseudo second degree reaction and is suitable for the Langmuir isotherm. As thermodynamic constants, & UDelta;H & DEG; = 7.407 kJ mol-1 and & UDelta;S & DEG; = 33.25 J mol-1 were determined. As a result of this, it was determined that the adsorption reaction was endothermic, spontaneous and random, and adsorption was physical adsorption. The results show that sewage sludge ash can be used in the treatment of water containing high concentrations of Pb2+.
AtıfWoS3OpenAlex4İncele - Derleme MakaleYalnız künye2022The Journey of Customer Identification: A Systematic Literature Review and Directions for Further Investigation
Vardarsuyu, Merve; Sunaoglu, Serife Kazanci
Customer identification has been a key concept in understanding consumers' relationships with brands. In this review article, we aim to provide a comprehensive overview of extant knowledge on customer identification and offer suggestions for future development in line with the gaps identified in the prior literature. We systematically review 73 peer-reviewed journal articles pertinent to customer identification in the Scopus database. We discuss the review findings in five sections, namely, conceptualization, theoretical framework, descriptive information, methodological trends, and key variables. Drawing from the gaps in the existing literature, we propose several suggestions for future research and end the paper with concluding remarks.
AtıfWoS1OpenAlex1TR Dizin2İncele - MakaleAçık Erişim2022SOME INTEGRAL CHARACTERIZATIONS OF TIMELIKE HELICES IN R42
Erpehlivan, Zeliha; Kocayigit, Hüseyin; Aydin, Tuba Agirman
In this study, we examine timelike helices in R-2(4) and some integral characterizations of these curves in terms of Frenet frame. In addition, we study timelike 2B slant helices in R-2(4) and present the differential equations for vector positions.
- MakaleYalnız künye2022TIMELIKE HELICES IN THE SEMI-EUCLIDEAN SPACE E24
Aydin, Tuba Agirman; Ayazoglu, Rabil; Kocayigit, Huseyin
In this paper, we define timelike curves in R-2(4) and characterize such curves in terms of Frenet frame. Also, we examine the timelike helices of R-2(4), taking into account their curvatures. In addition, we study timelike slant helices, timelike B-1-slant helices, timelike B-2-slant helices in four dimensional semi-Euclidean space, R-2(4). And then we obtain an approximate solution for the timelike B-1 slant helix with Taylor matrix collocation method.
AtıfWoS1İncele - MakaleYalnız künye2022THE NEXUS BETWEEN SOCIAL UNREST AND MIGRANT REMITTANCES: EMPIRICAL EVIDENCE FROM GEORGIA
Ari, Yilmaz Onur; Koç, Umit
The paper examines the social unrest and migrant remittances relationship for Georgia using monthly time series data covering January 2007- July 2019. The Granger Causality Test was employed in the application of the econometric technique. Frequency domain causality test was also used in order to empower the findings of the study. The empirical findings showed that there is a bidirectional causality between the reported social unrest index (RSUI) and the remittance inflow to Georgia. Besides, frequency domain causality test results indicated that RSUI was the Granger cause of remittance inflow in the medium term (7-10 months), while remittance inflow was the Granger cause of RSUI in the short term (2-6 months). Social unrest comprises protests based on basic economic needs such as food, gas, electricity etc. Therefore, social unrest can be a supportive factor of remittances inflow to Georgia. This is in line with the view that remittances sent by Georgian immigrants to their families in Georgia are used for consumption rather than investments. On the other hand, remittances can be a determinant of social unrest for Georgia because the existence of separatist movements in Abkhazia and former South Ossetia can be interpreted as remittances can be an important source to fund these movements.
- MakaleYalnız künye2022INEQUALITIES OF HERMITE-HADAMARD TYPE FOR n-TIMES DIFFERENTIABLE ARITHMETIC-HARMONICALLY FUNCTIONS
Kadakal, Huriye
In this work, by using an integral identity together with both the Holder and the power-mean integral inequalities we establish several new inequalities for n-times differentiable arithmetic-harmonically-convex function. Then, using this inequalities, we obtain some new inequalities connected with means. In special cases, the results obtained coincide with the well-known results in the literature.
AtıfWoS1İncele - MakaleYalnız künye2022Scopus SJRQ2Crafts and Craftmanship in Bayburt Province as an Example of the Problems Faced in Transmission of Intangible Cultural Heritage
Kabak, Uyesi Turgay
Trading is one of the first planned and organized activities that mankind put forward after his life on earth started. Because human beings are not a being that can meet all their needs by themselves. They also need what other people produce in order to survive. People all over the world have developed different organizations in order to meet this need, which has led to the birth of trade, professions and money flow. The Ahiorder organization developed by the Turks in Anatolia and its surroundings and the craftsmen within this organization met all the goods and services needed by the Turkish people in the past with an intensive way of working. However, these crafts and the activities of the craftsmen performing these should not be considered merely as commercial activities. Because a very rich tangible and intangible cultural heritage has also been formed around these activities. The purpose of this study is to examine the situation of the five facing extinction among the handicrafts in Bayburt province, which are one of the first forms of production and have a production process intensive by hand. Document analysis and field research methods, which are among qualitative research methods, were used in this study. Observation and interview techniques were used in the field research. Then, the data obtained were examined in the light of the relevant literature and it was determined that even in the province of Bayburt, where traditional life continues to a certain extent compared to other big cities, crafts and craftsmen cannot compete with the industrial and commercial power of modern times and are about to disappear. The situation revealed by this result does not only mean the disappearance of some crafts. It is seen that a wide-ranging traditional knowledge of the craftsmen who carry out this craft, from learning the profession to its execution, from selling to the public to the professional law among tradesmen, has begun to disappear without being transmitted to future generations. The disappearance of professional knowledge, which is one of the important corners of the national culture and accepted by UNESCO in the intangible cultural heritage list within the framework of various conventions, also shows that we are facing with great problems in the transmission of our intangible cultural heritage to the future generations in our country in general and in Bayburt in particular. Today, the products that are the concrete output of the crafts are taken under protection by amateurs, museums and various institutions in our country, even if they are disconnected from their context; however, it is not enough to keep only materials in order to keep the cultural value of these crafts alive. The materials must be kept alive with the context of the production process. Only in this way can the cultural codes in the professional knowledge be transmitted to the future generations and brought to the world cultural heritage. The point of the study is that if it is late in the province of Bayburt, this intangible cultural heritage will become extinct together with the craftsmen who are the last representatives of their profession. In this regard, it was remarked that this process can be reversed with the projects in which the official institutions, the experts employed at the universities and the Turkish National Commission for UNESCO are partnered together in terms of cities.