Bianchi I Model: An Alternative Way To Model The Presentday Universe

Although the new era of high precision cosmology of the cosmic microwave background (CMB) radiation improves our knowledge to understand the infant as well as the presentday Universe, it also leads us to question the main assumption of the exact isotropy of the CMB. There are two pieces of observational evidence that hint towards there being no exact isotropy. These are first the existence of small anisotropy deviations from isotropy of the CMB radiation and second, the presence of large angle anomalies, although the existence of these anomalies is currently a huge matter of debate. These hints are particularly important since isotropy is one of the two main postulates of the Copernican principle on which the FRW models are built. This almost isotropic CMB radiation implies that the universe is almost a FRW universe, as is proved by previous studies. Assuming the matter component forms the deviations from isotropy in the CMB density fluctuations when matter and radiation decouples, we here attempt to find possible constraints on the FRW type scale and Hubble parameter by using the Bianchi type I (BI) anisotropic model which is asymptotically equivalent to the standard FRW. To obtain constraints on such an anisotropic model, we derive average and late-time shear values that come from the anisotropy upper limits of the recent Planck data based on a model independent shear parameter of Maartens et al. (1995a,b) and from the theoretical consistency relation. These constraints lead us to obtain a BI model which becomes an almost-FRW model in time, and which is consistent with the latest observational data of the CMB.Comment: 16 pages, 4 figures, accepted in MNRA

Temperature changes of Niğde province in Turkey: Trend analysis of 50 years data

This research was carried out in center of Niğde province and Ulukışla district in Turkey. In the study, monthly minimum, maximum and average temperature data between 1970-2019 were evaluated. In the research, Sperman’s Rho and Mann-Kendall correlation tests and Sen’s slope method were applied to temperature data. According to the results of the research, it has been observed that the average minimum temperature for many years was -1,2 °C in center of Niğde province and -2,9 °C in Ulukışla district. Average temperature values were found as 12,8 °C in Center of Niğde and 9,8 °C in Ulukışla district. The average of maximum temperature was found to be 24,5 °C in Niğde Center and 23,1 °C in Ulukışla district. A significant increase was observed in the spring, summer and autumn seasons in center of Niğde and Ulukışla district at minimum temperature values. When the average temperature trends was analyzed, it was determined that there was a significant increase in center of Niğde for every season. A significant increase in summer, autumn and winter seasons was observed in Ulukışla district. It had been determined that there was a significant increase in the maximum temperatures in each district in every season

Analysis of precipitation datas by Mann Kendall and Sperman's Rho rank correlation statistical approaches in Nevsehir Province of Turkey

In this research, the total and maximum precipitation values of long years (1970-2019) of Nevşehir province, Ürgüp districts and 34 years of Avanos 1986-2019 were subjected to the Mann Kendall and Sperman's Rho rank correlation tests. In this study; Change trends of the precipitation are presented with graphic distrubitions. According to the results of the trend analysis, it has been observed that the average maximum precipitation value for long years in Avanos district, Nevsehir Province and Ürgüp district is 9,1 mm, 11,3 mm, 10,7 mm and average total precipitation is 292,8 mm, 362,9 mm, 326,9 mm respectively. According to the results of maximum precipitation trends, it has been observed that there is a significant increase in Nevşehir province and Ürgüp districts in winter and autumn months. Considering the total precipitation distribution, it is concluded that there is a negative trend in the spring and autumn seasons in Nevşehir province and Ürgüp district

Spatial evaluation of land and soil properties in the example of Nevşehir province, Turkey

In this study, some land and soil properties were spatially evaluated with the help of 1/25.000 scaled digital soil maps belonging to Center of province in the Central Anatolia Region, Turkey. Land use capability, large soil groups, soil depths, erosion, slope and spatial distributions of current land uses were carried out in the research. Arc GIS 10.3.1 software, which is one of the Geographic Information Systems (GIS) software, was used for spatial analysis. With a maximum of 262518 in the study area, VI. class lands. Class I cover an area of ​​247 . In terms of large soil groups, and soils are dominant and the area covered by these soils is 450187 . The least area was found to be reddish brown soils with 124 . It has been determined that the least area in the depth classes is A class (greater than 150 cm) soils. In the study area, it is the soil with the maximum C class (50-90 cm) depth. When the land was examined in terms of slope, it was determined that the land with the highest 3rd degree slope (12-20%) was formed. The research area consists of soil structure that can be exposed to the 2nd degree erosion class at most. When the current land uses are examined, it is the garden area with the least usage area in the region and the area it covers is 3400 . It has been observed that the most dry farming areas are located in the study area. It is thought that the results obtained as a result of the study will be the basis for the agricultural studies to be carried out in Center of province

Urban Politics And The Work And Labour Processes Of Architecture: Survey Research With Young Architect-Workers In Turkey

Among the actors of architectural production, architect-workers are increasingly facing neoliberal urbanization and its socio-ecological consequences, and they are also exposed to exploitative work and labour conditions. In this article, we argue about a direct relation between neoliberal urban politics, production of urban space, and architects' work and labour conditions based on an online survey with a group of young architect-workers under 40 years of age. The survey findings reveal that neoliberal urban politics anticipating capital accumulation in state-led, anti-participatory, and aggressive urban interventions have transformed architects as precarious and replaceable workers in the last decade in Turkey. Policies in higher education, increase in student quotas and the unexpected fluctuations in the construction sector accelerate this process through which the precariousness for architects has sharply deepened. More specifically, our participants spontaneously form two generations, in reference to the year of 2013 as a turning point, and female participants and those who graduated in/after 2013 were more precarious than male participants and those who graduated in/before 2012, whereas university background provided no privilege. Consequently, participants stressed disbelief and dissatisfaction in their work; a vast majority planned to pursue another profession abroad. We hope that our research will contribute to architects' collective efforts in pursuing ethical urban space production processes in the post-pandemic era

The Policy Orientation of Turkey's Current Climate Change Strategy

This article aims to provide a comprehensive understanding of Turkey's approach to climate change on its path to an ecological civilisation. How does Turkey perceive climate change? What proposals does Turkey offer to tackle climate change? How have Turkey's perception and policy proposals on this matter taken their current shape? This article uses qualitative content analysis and descriptive statistics to address these questions. A fuller understanding of Turkey's climate change strategy can be gained through an integrative analysis of its recent Strategic Plan and Five-Year Plans in tandem with its key official documents related to climate change strategy and action plans. Our analysis suggests that Turkey's approach to climate change centres on an ambitious mission to place economic and social development within a sustainability framework. This mission springs from Turkey's growing percipience that the key to success in the struggle against climate change is in pursuing these efforts in coordination with the Sustainable Development Goals. The selected documents reflect a growing awareness that these efforts can be enhanced through closer cooperation between the public sector, private sectors, and civil society. Moreover, Turkey exhibits a strong understanding of the need for strengthening ties between the environment and future generations on the road to "green development". The addressed documents acknowledge the current obstacles on this road, particularly those relating to scant institutional, financial, and technical capabilities. Finally, the documents' frequent emphasis on sustainable energy, energy efficiency, and clean energy technologies points to the relevance of taking into consideration Turkey's energy strategy and action plans. In this area, Turkey's efforts at improving its institutional, financial, and technical capabilities seem to have borne their first fruits, though there is still a very long way to go to attain the capabilities required for fully implementing the intended strategies and action plans. A promising development is that enhanced public support for clean energy technologies and production has led Turkey to become a leading actor in clean energy

Evaluation of fetal stress in preeclamptic patients

Objective Previous studies have established the association between preeclampsia (PE)-induced stress on fetus and elevated 17-hydroxyprogesterone levels (17-OHP) of which known as a stress markers. The aim of our study was to evaluate the relationship between these markers that were analyzed via cord blood with the severity of PE. Methods Consecutive PE women who were admitted to Dr. Lütfi Kırdar Training and Research Hospital Obstetrics and Gynecology Clinics from August 2009 to December 2009 were recruited. Uncomplicated pregnant women admitted at the same period consisted the control group. Umbilical blood samples were collected from umbilical artery immediately after birth and 17-OHP analyzed. Results The study group consisted of 40 mild PE (n=12) and severe PE patients (n=28) and the control group consisted of 35 patients. Maternal age and body mass index were similar between the study groups, but the fetuses in the severe PE group had a smaller mean gestational age and mean birth weight (p=0.001). Umbilical cord 17-OHP levels were statistically significantly lower in the severe PE patients than the controls [Control group=12.5±4.6 (n=35); mild PE=10.3±6 (n=12, p=0.24), severe PE=9.6±5.2 (n=28, p=0.019)]. Although the patients with mild PE had lower 17-OHP levels, they were not statistically significant (p=0.827). Conclusion In our study, it is found that there is no association between PE severity and the cord blood levels of 17-OHP. The effect of early intervention that prevent feto-maternal complications may lead to normal or low levels of these markers of which was found increased in cord blood of preeclamptic patients in previous studies

Efficient Removal Approach of Micropollutants in Wastewater Using Membrane Bioreactor

In the recent past years, micropollutants that are pharmaceutically active compounds (PhACs) have been used extensively and have been discovered in raw sewage, wastewater treatment plants, effluents, surface, and groundwater with concentrations from ng/L to several μg/L. Even though many of these compounds are still not determined online, monitoring technology improvements progressed. Today’s wastewater treatment plants are not constructed to remove these micropollutants yet. Conventional activated sludge processes are used in the treatment of municipal wastewater but are not specifically designed for the removal of micropollutants. The remaining pharmaceuticals mix into surface waters. At that stage, they can adversely affect the aquatic environment and may cause issues for drinking water production. As the conventional methods are insufficient for removing the micropollutants, other alternative treatment methods can be applied such as coagulation-flocculation, activated carbon adsorption (powdered activated carbon and granular activated carbon), advanced oxidation processes, membrane processes, and membrane bioreactor. It has been observed that membrane bioreactor (MBR) can achieve higher and more consistent micropollutants removal. The removal of micropollutants is based on physicochemical properties of micropollutants and the conditions of treatment. Due to recent technical innovations and cost reductions of the actual membranes, the membrane bioreactor takes attention. In this study, membrane bioreactor experiments for micropollutants in drinking use, wastewater, and surface waters were investigated in detail based on literature investigations, and the feasibility of this method was evaluated