Aksaray University Institutional Repository
Not a member yet
8503 research outputs found
Sort by
A note on pseudoparallel submanifolds of Lorentzian para-Kenmotsu manifolds
No full textIn this article, pseudoparallel submanifolds for Lorentzian para-Kenmotsu manifolds are inves-tigated. The Lorentzian para-Kenmotsu manifold is considered on the W1 −curvature tensor. Submanifolds of these manifolds with properties such as W1 −pseudoparallel, W1 −2 pseudoparallel, W1 −Ricci generalized pseudoparallel, and W1 − 2 Ricci generalized pseudoparallel has been characterized
Sinteza fenolne smole ojačane nanočesticama TiO2 i njezin utjecaj na gorivost lamelirane drvne građe (LVL)
Get PDFIn this study, phenol-formaldehyde (PF) resin has been modified with titanium dioxide nanopar-ticles (nano-TiO2 ) at a varying ratio from 0.05 wt.% to 1.5 wt.% to enhance the thermal properties and combustion performance of the resins. The effect of the nano-TiO2 modification on the properties (chemical or thermal) of the resins was determined by Fourier to transform infrared (FT-IR) and thermal analysis (TGA) techniques. In addi-tion, the combustion performance of laminated veneer lumber (LVL) samples bonded with the PF resin modified with nano-TiO2 was tested. The result of the FT-IR analysis indicated that the modified PF resins had match peaks to the reference PF resin. These similarities of the peaks supported that the modified PF resins were successfully synthesise with phenol, formaldehyde, and nano-TiO2 . The PF resins modified by nano-TiO2 demonstrated better thermal stability than the reference resin. The nano-TiO2 modified PF resin exhibited a favourable influence on the combustion characteristics of LVL. In consequence, PF resin modified with nano-TiO2 could be used as a combustion retardant adhesive in the wood industry
Prediction of new stable crystal structures for ternary ErAgTe2 and YAgTe2 semiconductors: Ab initio study
No full textThe crystal structure, electronic, mechanical, and phonon properties of rare-earth ErAgTe2 and YAgTe2 compounds have been investigated using first-principles calculations based on density functional theory. We consider three different crystal structures: tetragonal (space group P 4‾ 21m, No. 113), orthorhombic (space group P212121, No. 19), and trigonal (space group P3m1, No. 156). The results indicate that all structures exhibit mechanical and dynamical stability with an anisotropic and ductile nature. The band gap is calculated using both PBE and HSE06 methods. The electronic properties of ErAgTe2 and YAgTe2 revealing the energy band gaps indicate that these compounds are semiconductors. The mechanical properties such as bulk, shear, Young's modulus, and Poisson's ratio were calculated. Finally, we explored the thermodynamic parameters, including the Debye temperatures and minimum thermal conductivities
Does green finance and institutional quality play an important role in air quality
No full textAs the negative repercussions of environmental devastation, such as global warming and climate change, become more apparent, environmental consciousness is growing across the world, forcing nations to take steps to mitigate the damage. Thus, the current study assesses the effect of green investments, institutional quality, and political stability on air quality in the G-20 countries for the period 2004-2020. The stationarity of the variables was examined with the Pesaran (J Appl Econ 22:265-312, 2007) CADF, the long-term relationship between the variables by Westerlund (Oxf Bull Econ Stat 69(6):709-748, 2007), the long-run relationship coefficients with the MMQR method proposed by Machado and Silva (Econ 213(1):145-173, 2019), and the causality relationship between the variables by Dumitrescu and Hurlin (Econ Model 29(4):1450-1460, 2012) panel causality. The study findings revealed that green finance investments, institutional quality and political stability increased the air quality, while total output and energy consumption decreased air quality. The panel causality reveals a unidirectional causality from green finance investments, total output, energy consumption and political stability to air quality, and a bidirectional causality between institutional quality and air quality. According to these findings, it has been found that in the long term, green finance investments, total output, energy consumption, political stability, and institutional quality affect air quality. Based on these results, policies implications were proposed
Akademisyenlerin Spor Okuryazarlığına Yönelik Görüşlerinin İncelenmesi: Bir Metafor Çalışması
Get PDFEğitim müfredatlarında kendine yer edinen spor okuryazarlık kavramı bireylerin bütünüyle spora adaptasyonlarının arttırılmasını gerektirmektedir. Dolayısıyla, bu araştırmanın amacı, akademisyenlerin spor okuryazarlığına yönelik beklentilerini ortaya çıkarmaktır. Araştırmaya, Gazi Üniversitesi Spor Bilimleri Fakültesinde görev alan 15 öğretim görevlisi katılmıştır. Araştırmada nitel araştırma yöntemlerinden biri olan fenomenoloji (olgu bilim) deseni kullanılmıştır. Araştırmanın verileri, öğretim görevlilerine kişisel bilgi formu uygulanarak ve öğretim görevlilerinden “spor okuryazarlığı…… gibidir / benzer; çünkü…” cümlesini tamamlamaları yoluyla elde edilmiştir. Veri toplama aracı bizzat araştırmacılar tarafından uygulanmıştır. Katılımcılar, gönüllülük esasına dayanarak araştırmada yer almıştır. Veriler içerik analizi tekniğiyle çözümlenmiş, verilerin analizinde sırasıyla adlandırma, eleme, kategori geliştirme, geçerlik ve güvenirliğin sağlanması, elde edilen metaforların frekanslarının hesaplanması, yorumlanması aşamaları takip edilmiştir. Öğretim görevlilerinin ürettikleri metaforlar “kazanım”, “farkındalık” ve “keşfetme” olmak üzere üç kavramsal kategoriye ayrılmıştır. Araştırmada öğretim görevlilerinin en çok “kazanım” daha sonra sırasıyla “farkındalık” ve “keşfetme” temasına ait metaforlar oluşturdukları tespit edilmiştir. Spor okuryazarlığı kavramının öğretim elemanları tarafından algılanmasının kavrama yönelik farkındalığı arttırmak adına önemli bir adım olarak görüleceği düşünülmektedir.The concept of sports literacy, which has found its place in educational curricula, requires enhancing individiuals
adaptation to sports as a whole. Therefore, the aim of this research is to reveal the expectations of academicians
towards sport literacy. 15 faculty members from the Faculty of Sports Sciences at Gazi University participated in
the study. Phenomenology, one of the qualitative research methods, was used in the research. The data of this
study were obtained by applying a personal information form to the faculty members and asking them to
complete the sentence “Sports literacy is like/similiar, because……”. The data collection tool was applied by the
researchers by themselves. Participants took a part in the study voluntarily. The data were analyzed by using
content analysis technique, and the stages of naming, elimination, category development, ensuring validity and
reliability, calculating and interpreting the frequencies were followed for the obtained metaphors The metaphors
produced by the faculty members were divided into three conceptual categories: "acquisition", "awareness" and
"discovery". It was determined that the faculty members mostly generated metaphors related to “gain”, followed
by “awareness” and “exploration” themes. It is believed that the perception of the concept of sports literacy by
academic stuff can be seen as an important step towards increasing awareness about the concept
Vacuum freeze dryer technology for extending the shelf life of food and protecting the environment: a scenario study of the energy efficiency
No full textThis study focused into vacuum freeze dryer technology for increasing food shelf life in a drying food technology. The determinants of energy consumption increase as the energy density of food production and storage increases. Reducing the amount of energy used for drying, freezing, chilling, refrigeration, and air conditioning is becoming more important. The objective of this study was to extend food's shelf life utilizing creative and novel technical approaches, such as vacuum freeze-drying's energy-efficient process. Despite being a part of this investigation, the vacuum freeze drier was created using environmentally benign energy sources. To minimize the carbon footprint of food preservation, it is essential to use eco-friendly energy sources in chilling storage. According to the first law of thermodynamics, the energy efficiency at 1 atm pressure and 25 [°C] temperature (neglecting potential and kinetic energies) in the dead state is calculated under thermal equilibrium conditions. In this study, the energy efficiency was shown according to 5 different scenarios. The results of energy efficiencies are as follows: η1 is from 14.3 to 21.4%, η2 is from 20.7 to 31.0%, η3 is from 27.3 to 40.9%, η4 is from 32.1 to 48.1%, and η5 is from 34.6 to 51.9%, respectively. This analysis demonstrates that the energy efficiency improved from 12 to 18 h. In this study, optimizations with scenarios were employed considering vacuum freeze-drying technology in the plant with sustainable energy sources can considerably improve food shelf life while limiting our environmental impact
Does Femoral Arterial Calcification Have an Effect on Mortality in Patients Who Underwent Hemiarthroplasty Due to Hip Fracture
No full textAim: We aimed to investigate the effect of femoral arterial calcification on mortality in patients who underwent hemiarthroplasty due to hip fracture.
Material and methods: In our study, 481 patients who were operated for hip fracture between 01.01.2015 and 01.01.2021 were evaluated retrospectively. Femoral arterial calcification on the fractured side was evaluated in the preoperative pelvic anteroposterior (AP) X-ray, and the patients were divided into two subgroups according to the presence or absence of femoral arterial calcification. The overall survival and first-month and first-year survival of the patients were evaluated. Patients' age, gender, side, fracture type, treatment method, time between fracture and operation date, presence of femoral arterial calcification and type of anesthesia (regional, general) were recorded.
Results: Of the 481 patients included in the study, 299 were female and 182 were male, and the mean age was calculated as 80.5. Of the patients, 187 were diagnosed with femoral neck fractures and the remaining 294 with pertrochanteric fractures. It was observed that the mortality rate in the first month after surgery was 58 (12%) for both groups, and the mortality rate in the first year was 173 (35.9%) for both groups. The overall postoperative mortality was calculated as 302 (62.7%) for both groups. Femoral arterial calcification was detected in 191 of 481 patients, and femoral arterial calcification was not observed in the remaining 290 patients. Similarly, when both groups were compared in terms of mortality in the first month after surgery, mortality in the first year and overall mortality rates, no significant difference was found between the groups (p>0.05).
Conclusion: In our study we showed that femoral arterial calcification has no effect on mortality in acute hip fractures treated by hemiarthroplasty in people over 65 years of age
Muhammed Ziyāeddīn Taskesānī (Taskesenli) and Sarf Treatise
Get PDFArapça, kelime hazinesi ve gramer açısından geniş bir dildir. Cahiliye döneminde Arapların şehir hayatından ziyade göçebe/bedevi bir hayat yaşamalarının bir sonucu olarak yazı geleneği tam anlamıyla gelişim göstermemiştir. Bu nedenle Arapça söz varlığı temelde sözlü (şifâhî) ve işitsel (semâî) kültüre dayanmaktaydı. Bu durum Arapçanın asli yapısını büyük ölçüde korumaya bir vesile teşkil etmekteydi. Ancak İslam fetihleriyle toprakların genişlemesi neticesinde bir taraftan diğer dillere karşı Arapçayı koruma öbür taraftan ise yeni Müslüman olan kavimlere Arapçayı öğretme gibi amillerden dolayı tedvin faaliyeti erken dönemlerde başlamıştır. Tedvin edilen kurallar, zamanla konularına göre müstakil birer ilim haline gelmeye başlamıştır. Bu ilimlerden biri de Arap dilinin kelime yapısını inceleyen sarf ilmidir. Sarf ilmi, dilin temel bileşenleri olan kelimeleri incelediğinden ilk dönemden itibaren dilcilerin ilgi odağı olmuş ve bu alanda birçok eser kaleme alınmıştır. Söz konusu eserlerden bir tanesi de son dönem Osmanlı ulemasından Muhammed Ziyâeddin Taşkesânî’nin (ö. 1914) Kitâbu sarfin sağîrin adlı risâlesidir. Bu çalışmada öncelikle sarf ilmi hakkında kısaca bilgi verildikten sonra müellifin hayatı, eserleri, Kitâbu sarfin sağîrin adlı risâlesi ve bu risâlede takip ettiği yöntemin yanı sıra risâlenin muhtevası ve sarf ilmine katkısı incelenmiştir. Çalışmanın sonunda da el yazması eserin tenkitli neşrine yer verilmiştir. Neşirde Diyanet Yazma Eser Kütüphanesi, nr. 6513-I’deki mecmua içerisinde bulunan mevcut tek nüshası esas alınmıştır.Arabic is a language with a rich vocabulary and grammar. Due to the nomadic/bedouin
lifestyle of the Arabs during the pre-Islamic era, the tradition of writing didn't fully
develop. As a result, the Arabic lexicon primarily relied on oral (spoken) and auditory
(heard) culture. This situation largely contributed to preserving the fundamental
structure of the Arabic language. However, with the expansion of territories through
Islamic conquests, efforts to protect Arabic against other languages and to teach it to
newly converted Muslim communities led to the early development of language
codification. The formalized rules gradually evolved into independent fields of study
based on specific topics. One of these fields is the science of morphology (sarf) which
examines the structure of words in Arabic. Sarf, being concerned with the fundamental
components of language, has been the focus of linguists since early times, and numerous
works have been written on this subject. One such work is the treatise titled “Kitāb sarf
sagheer” by Mohammad Ziyāaddīn Taskesānī, an Ottoman scholar of the late period (d.
1914). In this study, after providing a brief overview of the science of morphology, the
author's life, works, the treatise “Kitâbu sarfin sağîrin”, the methodology followed in the
treatise, as well as its content and contribution to the science of morphology are
examined. The study concludes with a critical edition of the manuscript
Household Food Insecurity and its Predictors: Evidence from Gombe Metropolis, Nigeria
Get PDFAchieving food security, especially at household level, is very fundamental for every country in the world especially African countries. It is to this end that this study set out to identify the factors determining food insecurity among households in Gombe metropolis, Gombe State of Nigeria. The household data used in this study were collected through administration of questionnaire. We used descriptive statistics and logistic regression technique to analyse the data. Although a total of 400 copies of questionnaire were administered to the respondents but 381 questionnaires were filled and returned. The descriptive analysis showed about 40 percentage of the respondents was food insecure. The logit regression results suggest that household size and income were the significant predictors of household insecurity in the area. As expected, household size positively determines the probability for household to be food insecure whereas income negatively affects the probability. Therefore, the study recommends among others include; government should create more job opportunities that will enhance the income level of people in order to reduce the magnitude of food insecurity. Secondly, government should, if possible, introduce and advocates for the importance of the family planning in order to curtail the population size.Özellikle hane düzeyinde gıda güvenliğinin sağlanması, başta Afrika ülkeleri olmak üzere dünyadaki her
ülke için çok önemlidir. Bu çalışmada, Nijerya'nın Gombe Eyaleti, Gombe metropolünde haneler
arasında gıda güvensizliğini belirleyen faktörleri belirlemek amacıyla yola çıkılmıştır. Bu çalışmada
kullanılan hane verileri anket uygulaması yoluyla toplanmıştır. Verileri analiz etmek için tanımlayıcı
istatistikler ve lojistik regresyon tekniği kullanılmıştır. Katılımcılara gönderilen 400 anketten 381’i
doldurulmuş ve geri dönmüştür. Tanımlayıcı analiz, katılımcıların yaklaşık yüzde 40'ının gıda konusunda
güvensiz olduğunu gösterdi. Lojistik regresyon sonuçları, hanehalkı büyüklüğü ve gelirinin bölgedeki
hanehalkı güvensizliğinin önemli yordayıcıları olduğunu göstermektedir. Beklendiği gibi, hane
büyüklüğü hane halkının gıda güvencesiz olma olasılığını pozitif olarak belirlerken, gelir olasılığı
olumsuz yönde etkiler. Bu nedenle, çalışma diğerleri arasında şunları önermektedir; Hükümet, gıda
güvensizliğinin boyutunu azaltmak için insanların gelir düzeyini artıracak daha fazla iş fırsatı
yaratmalıdır. İkinci olarak, hükümet, mümkünse, nüfus büyüklüğünü azaltmak için aile planlamasının
önemini tanıtmalı ve savunmalıdır
4 years of research trends on turkish Diyanet: bibliometric and thematic analyses
Get PDFDiyanet is a Turkish government-affiliated religious authority. Although it was established to manage the religious-social life of Turkish Muslims in the early republican period, it has been argued that it was a tool for the Islamization of Turkish society during the twenty-year AK Party rule. It has also been claimed that Diyanet is used as a theo-diploma tool for cultural diplomacy and soft power institutions abroad. In line with the theses in favor and against, there has been an increase in academic studies recently on the functions of the Diyanet at home and abroad. This study aims to explore the essence and types of research on Diyanet in the last fourteen years. The study implemented a bibliometric analysis and thematic analysis to map the literature on Diyanet using the Web of Science database. According to the study, the majority of Diyanet's research has been published in Turkey. France, Australia, the Netherlands and Germany also conducted significant research on Diyanet. Along with the religious issues, the other central research theme were politics, democracy, Erdogan, Germany, etc. Research on Diyanet reveals six themes by thematic analysis. The major themes are that Diyanet is Turkey's soft power tool abroad, a promoter of the pious generation, empowers scarf-wearing women, and an alternative educational institute social change-maker. However, some research articles have been critical of the Diyanet and focus on the theme that the Diyanet is used to legitimize R. T. Erdogan's authoritarian political rule. The study concludes that academic interest in Diyanet has increased in recent years. Moreover, the paper found that after the 15 July failed coup, a number of several were conducted to defame Diyanet globally