Prominent Foundation Research Articles

Shell buckling of suction buckets for offshore wind turbines considering imperfection and soil parameter sensitivity

Suction buckets or suction caissons in combination with jackets as substructures have become a prominent foundation solution for offshore wind turbines. These large shell structures with relatively thin walls are installed by pumping out the water inside the structure, which creates a pressure difference and thus a downward force. The circumferential compression on the cylindrical shell causes a risk of shell buckling. The prediction of the buckling capacity of such large cylindrical shells is challenging, since it depends significantly on the initial geometric imperfections resulting from the manufacturing process and on the boundary conditions imposed by the surrounding soil. Previous work on suction buckets revealed that the choice of a representative imperfection form and amplitude is very challenging and the buckling pressure is sensitive to soil modeling choices. In this work, various imperfection forms and amplitudes as well as different soil parameters are applied to geometrically and materially nonlinear finite element models and the buckling capacities are determined. The novelties in this contribution are in evaluating and comparing the effects of global and local imperfections in form of sinusoidal eigenmodes and weld depressions for an unstiffened cylindrical shell under hydrostatic compression. The results suggest that global imperfections are more detrimental than local imperfections and further, a new approach based on sorting eigenmode imperfections depending on the wave number to identify the most unfavorable eigenmode-affine imperfection pattern is developed. Additionally, this study is the first to show that the inclusion of soil plasticity and contact effects has a significant impact on the buckling pressure.

Linguistic practices from A sociolinguistic perspective

In his definition of language, the Swiss linguist Saussure acknowledged that it is primarily social, although it is structural; Where he studies the language away from external contexts, only focusing on its four levels: phonetic, morphological, grammatical and semantic; However, linguistic studies have recently developed, and language has become studied in terms of its relationship to society, and a whole science has emerged called by several names, including: sociolinguistics, sociolinguistics, social linguistics, sociolinguistics, sociolinguistics, sociology of language, and sociology of language, all of which are terms for one science, and accordingly We pose the following problem: What is sociolinguistics? Or what is its definition? And when did it appear? And what is its subject? And what are its fields? Through this research paper: we will know sociolinguistics, mention its most prominent foundations, and we will address its fields, and its origins.

Postmodernism and its Most Prominent Foundations in Western Thought: A Critical S tudy

Western thought has a clear impact on Arab and Islamic arena. Western ideas, philosophies, and visions have an impact on the world today. Therefore, this research addresses and identifies the concept of postmodernism, and its most prominent characteristics that distinguished this philosophy, as well as the most prominent foundations that resulted from it, and which led to the transformations that took place in the contemporary world today, from solidity and stability to fluidity and permanent change, and from certainty to suspicion, and from Optimism into nihilism, and these great transformations that occurred in the history of Western thought led to the production and foundations of relativism, which became a feature of postmodernism, as the truth and the tendency to uncertainty and uncertainty were undermined, and it became a saying that there is no single fixed measure of right and wrong, which is the most prominent statement in This thought, and as a result of it, all mental and cognitive axioms were questioned, such as religion, man, beauty, the universe, politics, history and so on. The feature of nihilism also emerged as one of the most prominent features of this thought, as the absurdity, darkness and loss of meaning made life a general feeling and perception about this world, and this feeling we find. According to most postmodern philosophers in their writings, the characteristic of deconstruction came as a given that the philosophers of this thought relied on to deconstruct the certain axioms and knowledge that are central and stable, and these foundations were generalized to include Ga Political, economic, social, cognitive, and other aspects.

Stochastic modeling of geometric imperfections for buckling analysis of suction buckets

Recently, suction buckets have become a very prominent foundation for bottom fixed and floating offshore wind turbines. They are embedded with an installation force that stems from water evacuation inside the bucket. This internal negative pressure leads to a high risk of structural buckling. The buckling strength is significantly reduced by geometric imperfections. In previous work, equivalent geometric imperfection forms were introduced and the lower bound was evaluated. However, it has not yet been possible to identify a generally appropriate imperfection form. A probabilistic design approach based on realistic imperfections was not yet considered for suction buckets. Therefore, in this work, a stochastic modeling approach is introduced, which bases on measured data. The imperfection is decomposed to the half-wave cosine Fourier representation. Realizations of the imperfection pattern are generated by filtering white noise with the amplitude spectrum. They are then applied as out of plane deviations on a geometrically and materially nonlinear finite element model and evaluated. The resulting buckling pressure distribution can then be evaluated for different reliability levels. By considering more realistic imperfections and a plastic soil model, the buckling pressure increases by up to a factor of two compared to the conservative stress-based buckling approach.

مبادئ الاستلزام الحواري في رواية "هروب نحو القمة" لأحمد الزاويتي في ضوء قواعد غرايس

Conversational implicature is one of the most important and most prominent foundations of pragmatics. Therefore, the study aims to employ the four rules of Conversational implicature of Grice (quantity, quality, Manner, and Relation) in the novel (Escape to the Summit) by Ahmed Al-Zawiti, following the descriptive-analytical approach, as it touched on some models of Conversational implicature in the novel, and analyzed them according to the Pragmatics approach, so the research attempts to reveal the theory (Conversational implicature in the novel An Escape to the Summit) by Ahmed al-Zawity through an introduction and two demands. In the introduction, we dealt with the Conversational implicature, the origins, and premises, in the first requirement, we dealt with: the principles of conversational implicature and The second is for: The manifestations of the principles of implication in the novel.

Experimental and Numerical Investigation for Vertical Stress Increments of Model Piled Raft Foundation in Sandy Soil

Piled raft foundations have become a prominent foundation system in recent years as they combine bearing capacities of piles and raft. For this reason, comprehensive analytical, numerical and experimental studies have been carried out for reliable and economic design of piled raft foundations. In this study, vertical stress increments were mainly investigated experimentally and numerically. In the experimental study, model composite (steel and concrete) piles with a diameter of 20 mm and lengths of 200 and 300 mm were used. The raft was made of steel plate with plan dimensions of 160 × 160 mm and a thickness of 6 mm. The pressure gauges were placed at 2.5D, 5D and 7.5D intervals axially below center of model piled raft in the sand. The tests were carried out at different relative densities with the model piled raft. After model tests, numerical analyses were carried out with the FEM-based software ABAQUS, and the results were compared with the experimental results. From the tests results, it is determined that the piled raft foundations transfer loads to the deep layers with the help of piles, and the vertical stress increment reduces downward from the end of the piles. However, it is seen that the increase in relative density decreases the vertical stress increments in sand for same load. Some design parameters are suggested for use in foundation engineering applications.

Arkaik ve Klâsik Hellen Toplumlarının Mekâna Bağlı Köken ve Kuruluş Mitosları

Klâsik Dönem Hellen dünyasının ayırt edici nitelikleri Atina polis'i üzerinden tespit edilse de bu kültürün çerçevesi, Arkaik Dönem Hellen siyasi coğrafyasında bulunan tüm toplumların iletişim dünyası içinde belirlenmiştir. Erken Hellen toplumlarının iletişim dünyasının en önemli ortak birikimi olarak, Homeros'a atfedilen şiirler gösterilebilir ki Hellen siyasi, sosyolojik ve mitolojik hafızasına özgü birçok unsur, nitelikleriyle birlikte ilk defa bu dizelerde kendini gösterir. Konumuz bağlamında, özellikle dizelerde belirlenen mitolojik hafıza önem arz eder. Öyle ki, Hellen toplumları açısından mitolojinin yüklendiği tarihsel rol, burada ve diğer aktarımlarda konu edilen mitolojik kahramanların ya da olayların çoğunlukla siyasal nedenlerle Arkaik ve Klâsik Dönem ozanlarınca yeniden kullanılmasına, ekler görerek yeniden biçimlendirilmesine neden olmuştur. Bu çalışmada; Arkaik ve Klâsik Hellen toplumlarının kuruluş ve köken iddiaları aşamasında yoğunlukla kullanılarak öne çıkarılan mitoslar belirlenecek, toplumların mitoloji üzerinden izlediği diplomasinin iç ve dış politikalardaki etkileri ve sonuçlarına değinilecektir. Son olarak ise, Arkaik Hellen toplumlarının hafızasında olgunlaşmaya başlayan bu geleneğin, Hellenistik Dönem'le birlikte toplumlara kimlik oluşturma ve kültürel bütünlük kurma aşamasında üstlendiği işlevsel rol özetle konu edilecektir.

Has the Elite Foundation Agenda Spread Beyond the Gates? An Organizational Network Analysis of Nonmajor Philanthropic Giving in K–12 Education

Previous research focusing on major philanthropic foundations suggests that these actors have collectively converged around a set of jurisdictional challengers promoting market-based education reforms. Using correspondence analysis, network analysis, and geographic information science, this article empirically tests whether this convergence has permeated to less prominent foundations and their grantees, or if these foundations are pursuing alternative organizational strategies to shape K–12 outcomes. The analysis draws from a sample of 15 nonmajor foundations and their 1,069 grantees serving some aspect of K–12 education in 2010. We find that nonmajor foundations have adopted some elements of major foundations’ organizational strategies to influence K–12 education but that their strategies are heterogeneous and reflect both challenges to—and opportunities for—a more varied and democratic structure of policy making.

Best combiners during 40 years of breeding Vitis cuitivars resistant to Pierce's disease

By breeding for resistance to Pierce's disease in Vitis we have obtained useful cultivars that can be grown productively in areas formerly considered unsuitable for grape production. Reviewing the most successful recombinants from crosses made between 1945 and 1984, 6 Vitis clones were prominent foundation parents among those tested as primitive resistant germplasm: V. aestivalis , ssp. smalliana cvs Fla. 43-47 and Fla. 449, V. aestivalis ssp. simpsoni cvs Pixiola and Fla. 451, and V. shuttleworthii cvs Haines City and Kissimmee. The best combiners for productivity, fruit size, and high quality were PD susceptible cultivars Aurelia, Carolina Blackrose, Cardinal, Exotic, Golden Muscat, and Villard blanc. The best combiners for seedlessness and early ripening were susceptible cultivars Lakemont and Perlette. Selection for resistance to PD required 7 or more years each generation for exposure of seedlings to PD-carrying vectors. Inbreeding was detrimental to vine vigor but good combiners were selected among inbred progeny which were more homozygous for disease resistance. Subsequent crosses of these inbreds to large-fruited, high-quality cultivars resulted in some recombinants with restored vigor and superior traits such as Blanc Du Bois.

STORE LOYALTY ON ONLINE STORE CUSTOMERS IN INDONESIA

Nowadays, online retailing in Indonesia had flourished and estimated to be one of the most prominent foundation to boost Indonesia’s economic growth. Aiming to anticipate the trend, this research is written in order to gain a deeper understanding about the loyalty behavior among online store customers in Indonesia by investigating the influence of store image and perceived value towards online store loyalty. Data in this research were collected from online questioner sent troughout online forum and social media. Structural Equation Modelling method is used here along with software Lisrel 8.80. Past studies found that online store image, perceived utilitarian value and perceived hedonic value positively influences one of several dimensions of loyalty, repurchase intention. This research proves that online store image directly influences perceived utilitarian value, perceived hedonic value and online store loyalty while neither perceived utilitarian value nor perceived hedonic value directly influences online store loyalty. This research also found that ease of use and trustworthiness as the most reliable and influential dimensions in online store image.

STORE LOYALTY ON ONLINE STORE CUSTOMERS IN INDONESIA

Nowadays, online retailing in Indonesia had flourished and estimated to be one of the most prominent foundation to boost Indonesia’s economic growth. Aiming to anticipate the trend, this research is written in order to gain a deeper understanding about the loyalty behavior among online store customers in Indonesia by investigating the influence of store image and perceived value towards online store loyalty. Data in this research were collected from online questioner sent troughout online forum and social media. Structural Equation Modelling method is used here along with software Lisrel 8.80. Past studies found that online store image, perceived utilitarian value and perceived hedonic value positively influences one of several dimensions of loyalty, repurchase intention. This research proves that online store image directly influences perceived utilitarian value, perceived hedonic value and online store loyalty while neither perceived utilitarian value nor perceived hedonic value directly influences online store loyalty. This research also found that ease of use and trustworthiness as the most reliable and influential dimensions in online store image.

NGO 'Lawfare' Exploitation of Courts in the Arab-Israeli Conflict

NGO 'Lawfare' Exploitation of Courts in the Arab-Israeli Conflict

The Organizational and Political Threats to School-Linked Integrated Services

The accumulating evidence from the array of school-linked social service initiatives launched over the past decade provides a glimpse of the enduring obstacles and challenges to integrated services. The notable failure of two prominent foundation efforts indicates a critical crossroads for this public policy movement. This article explores the organizational and political constraints that threaten to undercut the school-linked services movement. The discussion focuses on the misguided messages that have helped slide the issue of children 's services to the center of the policy table on the naive and narrow assumption that integrated services will produce more economical and efficient systems for families. The concluding argument urges educators and policy makers to move beyond the erratic and irregular child-saving impulses that have marked earlier education and social services policies to efforts that understand the complexity of the lives of children and the economic foundation of their families.

Adjusting scrotal circumference of yearling beef bulls in five composites

Records from five composite strains of beef cattle were used to estimate age of dam and age of bull adjustment factors for scrotal circumference of yearling bulls. Data were obtained from Beefbooster Cattle Alberta Ltd., Calgary, AB. There were 5244 scrotal circumference records on yearling bulls born from 1987 to 1992. M1, M2, and M4 were maternal composites selected primarily for weaning weight, M3 was a terminal composite selected primarily for low birth weight, and TX was a terminal composite selected primarily for feedlot gain. The prominent foundation breeds were Angus for M1, Hereford for M2, various small breeds for M3, Limousin and Gelbvieh for M4, and Charolais for TX. Statistical analyses were performed for each composite separately according to the model that included the fixed effects of herd, year, age of dam and linear (quadratic was not significant) regression on age of bull at measurement. Average age at measurement was 340, 333, 361, 358, and 375 d for M1, M2, M3, M4, and TX, respectively, and range in age was about 100 d for most composites. Age of dam was significant for all composites except M4. Linear regressions on age of bull were 0.0376, 0.0379, 0.0308, 0.0410, and 0.0349 cm d−1 for M1, M2, M3, M4, and TX, respectively. Scrotal circumference of composite bulls should be adjusted additively for age of dam and linearly for age of bull. These adjustments tended to be smaller for age of dam and larger for age of bull than those reported for straighbred or purebred bulls. Key words: Beef cattle, composites, scrotal circumference, adjustment factors