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Surface coating of micronized calcite (CaCO3) with stearic acid via an attritor mill
Full text linkIn this study, the surface coating (modification) of micronized calcite (CaCO3, d50=135 ?m) in a stirred media (bead) mill with stearic acid was investigated. As a result of 15 min grinding and 5 min coating experiments, a product with d50=2.15 ?m and specific surface area of 3.21 m2/cm3 was obtained. The activation rate of this final product as an indicator of coating rate was 97.7%. According to the optimum coating results, the stearic acid rate was determined as 1%, the modification time was 7.5 min, the ball load was 900 g and the stirring speed was 600 rpm
The relationship between primary school students' science course responsibility levels and their academic success and basic skills
Full text linkEğitim Bilimleri Enstitüsü, Temel Eğitim Ana Bilim Dalı, Sınıf Öğretmenliği Bilim DalıBu araştırmanın amacı, ilkokul 3. ve 4. sınıf öğrencilerinin fen bilimleri dersi sorumluluk düzeylerini belirlemek ve öğrencilerin sorumluluk düzeyleri ile akademik başarıları ve temel becerileri arasındaki ilişkiyi tespit etmektir. Bu araştırmada birden fazla özelliğe ilişkin veri toplanarak bunlar arasındaki ilişki incelendiği için ilişkisel tarama modeli kullanılmıştır. Araştırmanın evrenini, Nevşehir il merkezindeki 2022-2023 eğitim öğretim yılında öğrenimine devam eden 3. ve 4. sınıf öğrencileri oluşturmaktadır. Araştırmanın örneklemi ise küme örneklem yöntemiyle tespit edilmiş ve ilde yer alan 10 okuldan 310 üçüncü sınıf, 310 dördüncü sınıf olmak üzere 620 öğrenciden oluşmuştur. Araştırmada kullanılan veri toplama araçları; Açıkgöz(2021) tarafından geliştirilen "Fen Bilimleri Dersi Odaklı Öğrenci Sorumluluk Ölçeği", Padilla, Cronin ve Twiest (1985)'in geliştirdiği; Aydoğdu ve Karakuş (2015)'un Türkçe'ye uyarladığı "Temel Beceriler Ölçeği" ve araştırmacının hazırladığı hem 3. hem de 4. sınıf akademik başarı testleri kullanılmıştır. Araştırma bulgularına göre; ilk olarak ilkokul 3. ve 4. sınıf öğrencilerinin fen bilimleri dersine yönelik sorumluluk, akademik başarı ve temel becerileri düzeylerini belirleyebilmek için betimsel analizler uygulanmıştır. Uygulama sonucunda; sorumluluk ve akademik başarıları yüksek, temel becerileri ise orta düzeyde bulunmuştur. İkinci olarak öğrencilerin sorumluluk düzeylerinin cinsiyet ve sınıf düzeyi değişkenlerine göre anlamlılık durumunu inceleyebilmek için MannWhitney U- testi uygulanmıştır. Test sonucunda; kız öğrencilerinin ve 3. sınıf düzeyinin lehine anlamlı düzeyde farklılık olduğu belirlenmiştir. Üçüncü olarak öğrencilerin sorumluluk düzeyleri ile akademik başarıları ve temel becerileri arasındaki ilişkiyi incelemek için korelasyon analizi yapılmıştır. Analiz sonucunda; öğrencilerin fen bilimleri dersi sorumluluk düzeyi ile akademik başarıları ve temel süreç becerileri arasında pozitif yönde ve orta düzeyde bir ilişki olduğu belirlenmiştir. Son olarak öğrencilerin akademik başarı ve temel becerileri, sorumluluk düzeylerini yordama durumu için regresyon analizi yapılmış ve sonucunda fen bilimleri dersine yönelik akademik başarı ve temel beceri düzeyleri, sorumluluk düzeylerinin anlamlı bir yordayıcısı olduğu belirlenmiştir. Anahtar Kelimeler: İlkokul Fen Bilimleri Dersi, Sorumluluk, Akademik Başarı, Temel Süreç Becerileri.The purpose of this research is to determine the science course responsibility levels of primary school 3rd and 4th grade students and to determine the relationship between students' responsibility levels, academic achievements and basic skills. In this research, the relational screening model was used because data on more than one feature was collected and the relationship between them was examined. The population of the research consists of 3rd and 4th grade students who continue their education in the 2022-2023 academic year in Nevşehir city center. The sample of the research was determined by the cluster sampling method and consisted of 620 students, 310 in the third grade and 310 in the fourth grade, from 10 schools in the province. Data collection tools used in the research; "Science Lesson Focused Student Responsibility Scale" developed by Açıkgöz (2021), developed by Padilla, Cronin and Twiest (1985); The "Basic Skills Scale" adapted into Turkish by Aydoğdu and Karakuş (2015) and both 3rd and 4th grade academic achievement tests prepared by the researcher were used. According to research findings; Firstly, descriptive analyzes were applied to determine the levels of responsibility, academic success and basic skills of 3rd and 4th grade primary school students towards the science course. As a result of the application; Their responsibility and academic achievements were found to be high, while their basic skills were found to be at a medium level. Secondly, MannWhitney U-test was applied to examine the significance of students' responsibility levels according to gender and grade level variables. As a result of the test; It was determined that there was a significant difference in favor of female students and 3rd grade students. Thirdly, correlation analysis was conducted to examine the relationship between students' responsibility levels, academic achievements and basic skills. As a result of the analysis; It was determined that there was a positive and moderate relationship between students' science course responsibility level and their academic success and basic process skills. Finally, regression analysis was conducted to determine whether students' academic success and basic skills predicted their level of responsibility, and as a result, it was determined that their academic success and basic skill levels for the science course were a significant predictor of their level of responsibility. KeyWords: Primary School Science Course, Responsibility, AcademicAchievement, Basic Process Skills
SOFİSTİKE ÜRÜN ÜRETİMİ VE İHRACAT ÜZERİNE ETKİLERİ: TÜRKİYE ÖRNEĞİ
Full text linkÜlkelerin bilgi ve teknoloji içerikli üretim yapabilmeleri için kompleks bir üretim yapısına sahip olmaları gerekmektedir. Ürünlerin ne derece sofistike olup olmadığı da ekonomik kompleksite endeksi ile ölçülmektedir. Bu endeks, ülkelerin her yıl ürettikleri ürünlerde bilgi ve teknolojiyi ne oranda kullandıkları ile ilişkili olup aynı zamanda ülkelerin ürün çeşitlendirme ve geliştirme yeteneğini de yansıtmaktadır. Bu çalışma da, üretiminde bilgi ve teknolojinin yoğun olarak kullanıldığı ve yüksek teknolojili ürünler olarak adlandırılan sofistike ürünlerin Türkiye’nin ihracatına etkisini zaman serisi yöntemiyle ARDL Sınır Testi kullanarak araştırılması amaçlanmaktadır. Aynı zamanda en uygun ihracat politikalarını belirlemeye çalışılmaktır. Bu nedenle çalışmada sofistike ürün üretebilme yeteneğinin göstergesi olarak kabul edilen ekonomik kompleksitenin, Türkiye’nin ürün ihracatına etkisi 1982 - 2019 yılları arasını kapsayan dönem için 1994 ve 2001 ekonomik krizleri ve 2008 küresel krizi de dikkate alarak kırılmalı birim kök testleri yapılarak incelenmiştir. Elde edilen ARDL sınır testi sonuçlarına göre, Türkiye’nin ekonomik kompleksitesindeki artışın, analiz kapsamında ele alınan tarihler itibariyle Türkiye’nin ihracatını uzun dönemde arttırdığı söylenebilmektedir. Benzer şekilde, kısa vadede söz konusu etkiden bahsedilebilmektedir
Depositional Properties and Paleoclimate of a Middle-Upper Pleistocene Fan Delta Sequence in the Bor Plain, Central Anatolia, Turkey
Full text linkThe Bor Plain, which is located in the Middle Kizilirmak subregion of the Central Anatolia Region, extends 14 km toward the west of Nigde. The fan delta deposition system in the southwest of the Bor Plain was formed on the fault-controlled foothills of Mt. Keciboyduran. The fandelta sequence shows that a paleolake formed during a phase because of the mineralogical content and frequently changing facies. Additionally, clay minerals and herbaceous plants reflecting humid and arid climatic conditions illustrate the lake-level changes. Six changes in the lake level occurred from marine isotope stage (MIS) 7 to (MIS) 5. Three major high stands occurred in the paleolake at the lowest and middle parts of the sequence. The first high stand was a stepwise transgression between similar to 240 and similar to 230 ka., and the second high stand was between similar to 200 and similar to 195 ka. The third high stand was characterized by a short transgression at 182 ka. After this stage, the lake receded significantly at 127 and 105 ka, indicating climatic control over the water level changes. In the transition from the Middle to Late Pleistocene, a revival of volcanic activity in the Leskeri monogenic volcanic mass released volcanic material, affecting sedimentation. Volcanic rocks increase dramatically in the upper section of the fandelta during an interval that coincides with low lake-level fluctuations
Evaluation of third-party logistics service providers for car manufacturing firms using a novel integrated grey LOPCOW-PSI-MACONT model
Full text linkAutomotive businesses often delegate logistical tasks to third-party logistics (3PLs) service providers to acquire a competitive edge in the dynamic market. Nevertheless, selecting the most suitable third-party logistics (3PL) partner is a multifaceted undertaking that needs careful evaluation of several criteria and alternatives. This research aims to introduce an integrated grey Multiple Criteria Decision Making (MCDM) framework for automotive businesses to deal with the multidimensional 3PL selection decision problem. This framework incorporates an enhanced Preference Selection Index (PSI), Logarithmic Percentage Change-driven Objective Weighting (LOPCOW), and Mixed Aggregation by Comprehensive Normalization Technique (MACONT). The LOPCOW-G and grey PSI (PSI-G) methods extract the criterion weights, whereas the MACONT-G method ranks the alternatives. The suggested framework's practicality is shown by conducting a case study about evaluating and selecting a third-party logistics (3PLs) provider. The findings indicate that the parameters of significant importance are skilled workforce (0.0977), financial strength (0.0901), and IT-IS competence (0.0839). Furthermore, TPL4 has been recognized as the most optimum option with a value of 0.4797. The MACONT-G model is as well compared against other grey MCDM techniques to assess the validity of the proposed model. The Pearson correlation coefficient between MACONT-G and the other models based on grey sets is 0.958, suggesting a significant and positive link. Furthermore, it is worth noting that a sensitivity analysis has been conducted to validate the accuracy and reliability of the created framework. In conclusion, this study has identified managerial and policy implications that might assist policymakers and executives in effectively evaluating 3PL providers
The effect of cognitive flexibility in nurses on attitudes to professional autonomy
Full text linkBackground: Professional autonomy, which directly affects the quality of professional nursing in patient care, and cognitive flexibility, which is an important factor for adaptation to change and developing nursing roles, are important concepts for nursing. Research objectives: This research was carried out to determine the effect of cognitive flexibility on attitudes towards professional autonomy in nurses. Research design: This was a descriptive study. Participants and research context: The research was conducted with 415 nurses working in a city hospital of a province, meeting the inclusion criteria and agreeing to participate in the study. A questionnaire form, The Cognitive Flexibility Inventory (CFI), and the Attitude Toward Professional Autonomy Scale for Nurses (APASN) were used to collect data. Ethical considerations Ethical approval was obtained from the university ethics committee before starting the study. Institutional permission was obtained from the city hospital where the study was conducted. Electronic informed consent was obtained from the nurses included in the study. Findings: In the study, the mean CFI score was 80.62 +/- 11.55 and the mean APASN score was 70.42 +/- 18.79. There was a weak positive correlation (r = 0.270; p < 0.05) between CFI and APASN scores. Moreover, the effect of the CFI mean score on the APASN mean score was found to be statistically significant (beta = 0.278; p < 0.001). Furthermore, CFI explains 7.7% of APASN. Conclusion: In the study, nurses' attitudes towards professional autonomy and cognitive flexibility scores were found to be at a good level. Cognitive flexibility has a positive effect on attitudes towards professional autonomy. Interventional studies that will increase the level of cognitive flexibility are recommended in the development of nurses' attitudes towards professional autonomy.We thank the nurses who participated in our study.We thank the nurses who participated in our study
Creating a Lactation Model for 305-Day Milk Yield with Different Resampling Techniques (Bagging Mars) in Mars Modeling
Full text linkThe main purpose of this research is to obtain a prediction model for milk yield by using Multivariate Adaptive Regression Splines (MARS) and Bagging MARS algorithms as a non-parametric regression technique. For this purpose, the effects on milk yield of 305 days were investigated by using lactation parameters in dairy cattle. In the study, 9337 lactation milk yield records belonging to 37 animals belonging to the 2022-2023 period were used and the data set was created by randomly ordering the animals. Data on milk yield results were analyzed with MARS and Bagging MARS algorithms. For dairy cattle; it was modeled with explanatory variables such as lactation month (month), service period (SP), last 7 days average milk yield (L7DMMY), animal's first birth age (FP), animal's age (Age), number of lactations (LN).Correlation coefficient (r), coefficient of determination (R2), Adjusted R2, Root of Square Mean Error (RMSE), standard deviation ratio (SD ratio), mean absolute percent error (MAPE), mean absolute for MARS algorithm estimating total average milk yield deviation (MAD) and Akaike Information Criteria (AIC) values are 0.9986, 0.997, 0.977, 0.142, 0.052, 0.2389, 0.086 and -88, respectively. Similar statistics for the Bagging MARS algorithm are 0.754, 0.556, 0.453, 1.8, 0.666, 3.96, 1.47, and 115, respectively. It has been observed that MARS and Bagging MARS algorithms provide correct results according to the goodness of fit statistics. In this study, it was revealed that MARS algorithm gave better results in milk yield modeling of 305-day lactation
Attitudes Towards Death and Perceptions of Spiritual Support of Nurses Caring for Patients in the Terminal Period: A Descriptive and Correlational Study
Full text linkAim: This descriptive and correlational study was conducted to analyze the attitudes towards death and spiritual support perceptions of nurses who care for patients in the terminal period and their relationship. Material and Methods: The population consisted of 378 nurses. The study sample was calculated according to the sample size of a specific population and included 198 nurses. The data were collected with the Personal Information Form, Attitude towards Death Scale, and Perception of Spiritual Support Scale. Data were analyzed using Kruskall Wallis Analysis of Variance, Correlation Analysis, and Mann-Whitney U Test. Results: The nurses’ gender and education level caused a difference in terms of their attitudes towards death. Fear of death and death avoidance scores of women were higher than those of men. As the educational level of nurses increases, their attitudes towards death change positively. As the perception of spiritual support increases, the positive attitude towards death also increases. Conclusion: It can be said that paying attention to variables such as gender, education level, and attitude towards death while planning the nurse workforce in inpatient units where end-of-life care is provided will increase the quality of nursing care
According to Nigde Newspaper social, cultural and economic structure of Niğde (1957-1958)
Full text linkSosyal Bilimler Enstitüsü, Tarih Ana Bilim DalıBirçok çeşidi olan fakat incelememizde yerel gazete türü olarak ele aldığımız Niğde Gazetesinin konu olduğu araştırmada sosyal siyasal kültürel spor ve daha birçok yönden bilgi veren süreli yayınlardan gazetenin önemi görülmektedir. Öyle ki bir ülkenin veya bölgenin o dönemde yaşam çehresini bize en iyi yansıtacak ürünler olarak nitelendirilebilmektedir. Bu çalışmanın konusu Niğde'nin ekonomik, sosyal ve kültürel yapısını Niğde Gazetesi ışığında tespit etmektir. Çalışma 1957-1958 yılları arasını kapsamaktadır. Niğde Gazetesi'ne ilişkin gazete arşivlerine Milli Kütüphane'den temin edilmiştir. Ek olarak DTCF Halil İnalcık Kütüphanesi ve araştırma kapsamında makale ve kitaplarda kaynak olarak araştırmamıza ışık tutmuştur.In the research on Niğde Newspaper, which has many varieties but which we considered as a local newspaper type in our analysis, the importance of the newspaper is seen among the periodicals that provide information on social, political, cultural, sports and many other aspects. So much so that they can be described as products that best reflect the life of a country or region at that time. The subject of this study is to determine the economic, social and cultural structure of Niğde in the light of Niğde Newspaper. The study covers the years 1957-1958. Newspaper archives for Niğde Newspaper were obtained from the National Library. In addition, DTCF Halil İnalcık Library shed light on our research as a source of articles and books within the scope of the research
Optimum Viscous Damper Distribution for Seismic Rehabilitation of Building Structures with Soft Story Irregularity
Full text link18th World Conference on Seismic Isolation, Energy Dissipation, and Active Vibration Control of Structures, WCSI 2023 -- 6 November 2023 through 10 November 2023 -- Antalya -- 319809Viscous dampers (VDs) are remarkably effective passive energy dissipation devices successfully implemented in building structures to reduce seismic demands during earthquake excitations. Viscous dampers can be utilized to enhance the resilience of structures against earthquake excitations. Besides that, they can be used for seismic rehabilitation of existing structures. Viscous dampers influence the dynamic response of the building structures that they are attached to; therefore, their allocation is vital. Furthermore, the optimum design of viscous dampers is another critical concept since they are expensive devices; thus, their optimum distribution results in a more economical method. This study suggests a methodology to rehabilitate existing building structures with soft story irregularities via optimum viscous damper distribution using the Particle Swarm Optimization (PSO) algorithm. Soft story irregularity causes significantly large peak inter-story drift ratios (IDR) and abrupt changes in peak inter-story drift ratios between adjacent stories. The primary objective of this study is to limit the peak inter-story drift ratios to an allowable limit. In the scope of this study, the suggested procedure was tested on shear buildings with soft story irregularity under different earthquake ground motions. The results of this study show that it is possible to keep peak inter-story drift ratios at an allowable limit with an optimum viscous damper distribution for shear buildings with soft story irregularity. Moreover, this study shows that the Particle Swarm Optimization algorithm can be successfully implemented on optimum viscous damper design problems in building structures. © The Author(s), under exclusive license to Springer Nature Switzerland AG 2024