Numerical Modeling of Liquefaction in Layered and Silt Inter Layered Sands

In this paper, the pyhsical model tests which were carried out in the laboratory on uniform sand columns, silt inter layered sand columns and two layered sand columns deposited at various relative densities and subjected to different input accelerations are numerically modelled. The numerical analyses are performed by using Towhata-Iai liquefaction model in a finite element program called DIANA and the excess pore water pressures computed from the numerical analyses are compared with the experimental results. The numerical analyses have shown that the development of excess pore water pressures is highly influenced by the relative density of the sand and the presence of a less permable soil layer within the sand deposit. The numerical modeling of silt interlayered sand tests showed that there is an abrupt increase in the ru values below the silt seam demonstrating the accumulation of pore water pressures due to the presence of silt layer. The results of the numerical analyses also revealed that a constitutive model coupled with a ground water flow analysis must be used to simulate the generation of excess pore water pressures especially in layered sand deposits

The integration of tall buildings in Urban environment: considering the key sustainability concepts

As a result of physical, social and economic needs, demand for tall buildings is increasing worldwide. Due to their great size and large impacts on urban environment, tall buildings,, have the potential to improve the quality around them through careful design and urban integration. When compared with lower buildings, tall buildings can be more challenging by means of architectural design and engineering details. Also, depending on their large area of influence, design considerations regarding sustainability and environmental integration of tall buildings need to be handled with more care than other conventional buildings in order to provide the most positive impact

The Predictive Effect of Anxiety and Burnout Levels Related to the COVID-19 Pandemic and Organizational Commitment on their Intention to Leave the Organization of the Healthcare Professionals

Objective: The study was conducted to determine predictive effect of anxiety and burnout levels related to the COVID-19 Pandemic and organizational commitment on their ıntention to leave the organization of the healthcare professionals. Methods: The sample of study consisted of 251 healthcare professionals who actively worked during the pandemic process. Data were collected by applying the "Coronavirus Anxiety Scale", "COVID-19 Burnout Scale", "Organizational Commitment Scale", and "Intention to Leave the Organization Scale". The data was analysed in the SPSS 22 package program. Results: 66.5% of all participants worked in the pandemic units during the pandemic process, 57.4% of them had COVID-19, 75.3% of them had COVID-19 vaccine, and 32.3% of them lost a relative due to COVID-19. 42.2% of the healthcare professionals had dysfunctional anxiety and they experienced a very high level of burnout, their continuance commitment, which is one of the subscales of organizational commitment, was high, their affective and normative commitment was moderate, and their intention to leave the organization was moderate. The anxiety level of healthcare professionals explained 7.7% of the change in their intention to leave the organization. The anxiety (p\u3c0.05) and burnout levels (p\u3e0.05) together explained 8.5% o the change in intention to leave the organization. The Anxiety and burnout levels and organizational commitment levels together explained 25.9% of the change in intention to leave the organization (p˂0.05). Conclusions: The anxiety levels and the levels of affective organizational commitment of healthcare professionals during the pandemic process are significant predictors of intention to leave the organization

FRESH CONCRETE PROPERTIES AND COMPRESSIVE STRENGTH OF SELF COMPACTING CONCRETES WITH SILICA FUME AND FLY ASH

Kendiliğinden yerleşen betonlar (KYB), geleneksel betona oranla işlenebilirlik, işçilik maliyetindeki azalmalar ve yüksek dayanım gibi önemli faydalar sağlayan beton teknolojisindeki gelişmelerdendir. KYB üretiminde yüksek oranda su azaltıcı süperakışkanlaştırıcı kimyasal katkılar, fazla miktarda toz malzeme ve/veya viskozite düzenleyici katkı maddesi kullanılmalıdır. Kendiliğinden yerleşme yeteneği; doldurma yeteneği, ayrışmaya karşı direnç ve geçiş yeteneği olmak üzere 3 parametre ile karakterize edilebilir. KYB üretiminde toz malzeme olarak genellikle kireçtaşı tozu, uçucu kül, granüle yüksek fırın cürufu ve silis dumanı kullanılmaktadır. Bu çalışmada mineral katkı maddesi olarak çimento yerine ağırlıkça % 5, % 10 ve % 15 oranlarında silis dumanı ve % 25, % 40 ve % 55 oranlarında uçucu kül kullanılarak KYB üretilmiş ve taze beton özellikleri ile sertleşmiş betonların 3, 7 ve 28 günlük basınç dayanımları belirlenmiştir. silis dumanı ilavesi basınç dayanımlarında artışa yol açarken uçucu kül katkılı betonlarda dayanım azalmaları tespit edilmiştir. En yüksek basınç dayanımı değeri 88 MPa değeri ile %15 silis dumanı kullanılarak üretilen betonlardan elde edilmiştir.Self Compacting Concrete, is one of the developments in concrete technology, which have important benefitsas workability, labor cost reductions and high-strength, compared to traditional concrete. In SCC production, high-range water reducing super plasticizer chemical additives, powder material and/or viscosity regulators additive must be used. Self-settlement capability may be characterized with 3 parameters; filling ability, resistance to decomposition and, passing ability between reinforcement bars. Limestone powder, fly ash, granulated blast furnace slag and silica fume is used as a powder material in SCC production. In this study SCC were produced with using silica fume instead of cement by weight, by the ratios of 5%, 10% and 15%, and fly ash with the ratios of 25%, 40% and 55%. Fresh concrete properties and 3, 7 and 28 days compressive strengths were determined. While SF increased compressive strength, addition of fly ash, on the contrary, decreased it. The highest compressive strength was observed from the concrete specimens with using 15% silica fume, with the value of 88 MPa.&nbsp

Analysis of the Relationship Between Smartphone Addiction and Internet Addiction and Self-Esteem and Loneliness

DergiPark: 545391trakyasobedİnternetve akıllı telefon bağımlılığı gelişen teknoloji ile birlikte psikoloji alandizininde sıklıkla incelenen konuların başında gelmiştir. Sürekli internet veakıllı telefon başındaki bireyler toplumdan uzaklaşmakta ve yalnızlaşmaktadır.Bu durum bireylerin kendilerine olan saygılarında da azalmaya neden olmaktadır.Bu çalışmanın amacı akıllı telefon ve internet bağımlılığı ile benlik saygısıve yalnızlık arasındaki ilişkinin incelenmesidir. Yapılan çalışmada ilişkiseltarama modeli tercih edilmiştir. Bu amaçla yürütülen çalışmaya 137’si kadın ve93’ü erkek olmak üzere 230 kişi katılmıştır. Katılımcılara içeriğinde;demografik veri formu, akıllı telefon bağımlılığı ölçeği, Young İnternetBağımlılığı Testi Kısa Formu, Rosenberg Benlik Saygısı Ölçeği ve UCLA YalnızlıkÖlçeği’nin bulunduğu anket formu uygulanmıştır. Yapılan korelasyon analizlerisonucunda akıllı telefon bağımlılığı ile benlik saygısı ölçeği toplam puanlararasında negatif, orta düzeyde ve anlamlı; telefon bağımlılığı ile yalnızlıkölçeği toplam puanları arasında pozitif ve düşük düzeyde anlamlı bir korelasyonkatsayısı elde edilmiştir. İnternet bağımlılığı ile benlik saygısı ölçeğitoplam puanlar arasında negatif, orta düzeyde ve anlamlı bir korelasyonkatsayısı; internet bağımlılığı ile yalnızlık ölçeği toplam puanlar arasında pozitif,orta düzeyde anlamlı bir korelasyon katsayısı hesaplanmıştır. İnternetin kişiiçin önemi, benlik saygısı ve yalıtılmışlık akıllı telefon bağımlılığınıyordamaktadır. İnternetin kişi için önemi, benlik saygısı, yaş ve yalıtılmışlıkinternet bağımlılığını yordamaktadır.Internetand smart phone addiction has been one of the most frequently studied topics inthe psychology field index along with the developing technology. Individualswho constantly interest internet and smart phone move away from society andbecome lonely. This leads to a decrease in the respect of individuals forthemselves. The aim of this study is to examine the relationship between smartphone and Internet addiction and self-esteem and loneliness. In this study,relational screening model was preferred. For this purpose, 230 people, 137 ofwhom were female and 93 of them were male, participated in the study.Demographic data, Smart Phone Addiction Scale, Young Internet Addiction TestShort Form, Rosenberg Self Esteem Scale and UCLA Loneliness Scale were appliedto the participants. The results of the correlation analysis, positive, low andsignificant correlation coefficient between smart phone addiction and self-esteemscale total scores, and negative, moderate and significant correlationcoefficient between smart phone addiction loneliness subscale total scores wasfound. Between internet addiction and self-esteem scale total scores positive,moderate and significant correlation coefficient; between internet addictionand loneliness scale total scores positive, moderate and significantcorrelation coefficient was calculated. The importance of the internet for theperson, self-esteem and the isolation have been found to be predictive factorsfor smart phone addiction. The importance of the internet for the person,self-esteem, age and the isolation have been found to be predictive factors forinternet addiction

Stem Cells and Innate Immunity in Aquatic Invertebrates: Bridging Two Seemingly Disparate Disciplines for New Discoveries in Biology

The scopes related to the interplay between stem cells and the immune system are broad and range from the basic understanding of organism's physiology and ecology to translational studies, further contributing to (eco)toxicology, biotechnology, and medicine as well as regulatory and ethical aspects. Stem cells originate immune cells through hematopoiesis, and the interplay between the two cell types is required in processes like regeneration. In addition, stem and immune cell anomalies directly affect the organism's functions, its ability to cope with environmental changes and, indirectly, its role in ecosystem services. However, stem cells and immune cells continue to be considered parts of two branches of biological research with few interconnections between them. This review aims to bridge these two seemingly disparate disciplines towards much more integrative and transformative approaches with examples deriving mainly from aquatic invertebrates. We discuss the current understanding of cross-disciplinary collaborative and emerging issues, raising novel hypotheses and comments. We also discuss the problems and perspectives of the two disciplines and how to integrate their conceptual frameworks to address basic equations in biology in a new, innovative way

Well-being children: Parental attitudes and the role of mindfulness

Bu araştırmanın amacı, anne-baba tutumu ve bilinçli farkındalığın çocuklarda iyi oluşu ne ölçüde yordadığını incelemektir. Araştırmaya 357 ortaokul öğrencisi (198 kız, 159 erkek) katılmıştır. Veri toplama aracı olarak Kişisel Bilgi Formu, Stirling Çocuklar İçin Duygusal ve Psikolojik İyi Oluş Ölçeği, Anne Baba Tutum Ölçeği, Çocuk ve Ergenler İçin Bilinçlilik Ölçeği kullanılmıştır. Araştırma kapsamında kişisel bilgi formunda yer alan demografik değişkenleri (cinsiyet, yaş, anne-baba öğrenim durumu, ailedeki çocuk sayısı, doğum sırası, okul türü, anne baba birliktelik durumu) incelemek için bağımsız gruplar t testi ve tek yönlü (one-way) ANOVA analizleri kullanılmıştır. Araştırmada bulunan iyi oluş, bilinçli farkındalık, anne-baba tutum alt boyutları olan sorumluluk ve kabul ile otorite ve denetleme değişkenleri arasındaki ilişkiyi incelemek için Pearson korelasyon analizi kullanılmıştır. Ardından araştırmanın asıl amacına yönelik anne-baba tutumu ve bilinçli farkındalığın iyi oluşu yordamadaki rolü Çoklu Regresyon Analizi ile test edilmiştir. Elde edilen bulgular, anne-baba tutumunun alt boyutu olan sorumluluk ve kabul ile bilinçli farkındalığın iyi oluşu anlamlı bir şekilde yordadığını göstermiştir. Bu iki değişken birlikte toplam varyansın %29'unu açıklamaktadır. Ayrıca sorumluluk ve kabul değişkenin bilinçli farkındalığa göre daha güçlü bir yordayıcı olduğu bulunmuştur. Araştırma sonuçları ilgili alanyazında tartışılarak ileride yapılacak araştırmalar ve uygulamalar için önerilerde bulunulmuştur. Anahtar Kavramlar: İyi oluş, anne baba tutumu, sorumluluk ve kabul, otorite ve denetleme, bilinçli farkındalık, çocuk.The aim of this study is to examine parental attitudes and mindful awareness predict level of well-being in children. 357 secondary school students (198 girls, 159 boys) participated in the research. Personal Information Form, Stirling Emotional and Psychological Well-Being Scale for Children, Parental Attitude Scale, and Consciousness Scale for Children and Adolescents were used as data collection tools. In this research, independent groups t-test and one-way ANOVA were used to examine the demographic variables (gender, age, educational status of parents, number of children in the family, birth order, school type, parental coexistence) in the demographic information form. Pearson correlation analysis was used to examine the relationship between the variables of well-being, mindfulness, parental attitude sub-dimensions, responsibility and acceptance, and authority and supervision. The role of parental attitudes and mindfulness in predicting well-being was tested with Multiple Regression Analysis for the main purpose of the research. The findings showed that responsibility and acceptance from parental attitudes and mindful awareness significantly predicted well-being. These two variables explained 29% of the total variance. It was also found that the variable of responsibility and acceptance was a stronger predictor than mindfulness. The results of the research were discussed in the related literature and suggestions were made for further studies. Key Words: Well-being, parental attitude, responsibility and acceptance, authority and supervision, mindfulness, child

Yüksek binaların kentsel çevre ile uyumu: sürdürülebilirlik kavramları üzerine.

As a result of physical, social and economic needs, demand for tall buildings is increasing worldwide. Due to their great size and large impacts on the urban environment, tall buildings, through careful design and urban integration, have the potential to improve the quality around them. Also, depending on their large area of influence, design considerations regarding sustainability and environmental integration of tall buildings need to be handled with more care than with other conventional buildings to provide the most positive impact. This study focuses on the physical and social environmental impacts of tall buildings where these impacts are examined through determined „key sustainability concepts‟. The identified relevant „key sustainability concepts‟ reveal the positive or negative, physical and social environmental impacts of tall buildings. These key sustainability concepts provided to be an observational tool to conduct a study on existing or new tall buildings, from the architectural scale to the urban scale. As a demonstration of its effectiveness on the urban environment, the defined key sustainability concepts of two tall buildings located in London, „The Shard‟ and ‟30 St Mary Axe (Gherkin)‟, were selected and compared through site analysis and survey methods. With this study, the possible negative and positive effects of tall buildings both on architectural and urban scale have been revealed through a physical and social sustainable approach.M.S. - Master of Scienc

Ar-Ge projelerinin performansının değerlendirilmesi için bağımlı kriterler ile çok kriterli karar verme yaklaşımı.

In this study, an Analytic Network Process (ANP) and Data Envelopment Analysis (DEA) based approach was developed in order to measure the performance of customer-based Research and Development projects being executed in TÜB TAKSAGE, Defense Research and Development Institute, under the Scientific and Technological Research Council of Turkey. In order to evaluate project performance, many criteria, containing various subcriteria were determined. In order to handle the interdependencies among the criteria and the sub-criteria, ANP was used. The ANP model generated in this study is a hybrid model consisting of both a hierarchy and a network. The pairwise comparison matrices that were built up for defining the importance and influences of the criteria/sub-criteria in the ANP model were formed as interval judgments from a group decision making process, based on data obtained from a questionnaire conducted among the experts in the Institute. From the interval pairwise comparison matrices, weight intervals for the sub-criteria were determined and these bounds were used as assurance region constraints in a super-efficiency DEA model, through which the project ranking was obtained. Taking into consideration that there may occur some missing values in some projects for some of the sub-criteria, the superefficiency DEA model was extended to handle missing data. The model was applied to a real case study on performance evaluation of the ongoing customer-based projects in the Institute. For comparison purposes, the case study was also solved by two other approaches.M.S. - Master of Scienc