Investigating Applicability of the Meshfree Method to the Structural Analysis of Tires

2012 ◽  
Vol 40 (2) ◽  
pp. 60-82
Author(s):  
Ken Ishihara ◽  
Takehiro Noda ◽  
Hiroyuki Sakurai

ABSTRACT In contrast to the finite element method (FEM), which is widely used in the tire industry nowadays, some alternative methods have been proposed by academic communities over the past decade or so. The meshfree method is one of those new methodologies. Originally intended to remove the burden of creating the mesh that is inherent in FEM, the meshfree method relies on the point data rather than the mesh, which makes it much easier to discretize the geometry. In addition to those modeling issues, it has been found that the meshfree method has several advantages over FEM in handling geometrical nonlinearities, continuities, and so forth. In accordance with those emerging possibilities, the authors have been conducting research on the matter. This article describes the results of the authors' preliminary research on the applicability of the meshfree method to tire analyses, which include the theoretical outline, the strategy of tire modeling, numerical results, comparisons with results of FEM, and conclusions.

Author(s):  
Rowan Nicholson

If the term were given its literal meaning, international law would be law between ‘nations’. It is often described instead as being primarily between states. But this conceals the diversity of the nations or state-like entities that have personality in international law or that have had it historically. This book reconceptualizes statehood by positioning it within that wider family of state-like entities. An important conclusion of the book is that states themselves have diverse legal underpinnings. Practice in cases such as Somalia and broader principles indicate that international law provides not one but two alternative methods of qualifying as a state: subject to exceptions connected with territorial integrity and peremptory norms, an entity can be a state either on the ground that it meets criteria of effectiveness or on the ground that it is recognized by all other states. Another conclusion is that states, in the strict legal sense in which the word is used today, have never been the only state-like entities with personality in international law. Others from the past and present include imperial China in the period when it was unreceptive to Western norms; pre-colonial African chiefdoms; ‘states-in-context’, an example of which may be Palestine, which have the attributes of statehood relative to states that recognize them; and entities such as Hong Kong.


Ethnography ◽  
2017 ◽  
Vol 19 (2) ◽  
pp. 149-152 ◽  
Author(s):  
Martín Sánchez-Jankowski

Introduction to Innovations in Ethnographic Methodology. From a conference hosted by the Center for Ethnographic Research at the University of California, Berkeley a number of original papers developing new methodologies in conducting ethnographic research were advanced. Each paper offers innovations to aid scholars in conducting research within both the phenomenological (Symbolic Interaction and Ethnomethodolgy) and scientific traditions.


Medicina ◽  
2022 ◽  
Vol 58 (1) ◽  
pp. 87
Author(s):  
Agnieszka Jodzis ◽  
Maciej Walędziak ◽  
Krzysztof Czajkowski ◽  
Anna Różańska-Walędziak

Background: Global access to social media has supposedly changed women’s awareness about the pharmacological and alternative methods of pain relief during vaginal delivery. The purpose of the study was to analyze changes in women’s preference and opinion about different forms of labor analgesia over the past decade. Materials and methods: The study was designed as an anonymous survey with questions about women’s knowledge and preference of different forms of pain relief in labor. The survey was conducted in 2010 and 2020, with data collected from 1175 women in 2010 and 1033 in 2020. Results: There were no differences between 2010 and 2020 in the proportion of women who wanted to receive analgesia in labor, at, respectively 67.9% of women in 2010 and 73.9% in 2020. About 50% of women chose epidural analgesia as the only efficacious method of pain relief in labor both in 2010 and 2020. There were no differences between the two time-points in the distribution of chosen methods of pain relief. In total, 92.3% of women in 2010 and 94.9% in 2020 thought that they should have the possibility of independent choice of analgesia method before the delivery (p < 0.04). Conclusions: A high proportion of Polish women choose EDA over other pharmacological and nonpharmacological methods of pain relief in labor, and this preference has not changed over the last decade. Increasing women’s knowledge about different methods of intrapartum pain relief may lead to wider use of nonpharmacological methods of pain relief.


2018 ◽  
Author(s):  
Ismail Suardi Wekke ◽  
Muhammad Yusuf ◽  
Agung Muttaqien

Arabic learning was starting from an assumption that its method was more important than its materials. This assumption then saw that its success would be determined by methods selected by the teacher. This paper discusses the paradigm encouraged Arabic teachers to master several methods considered effective and efficient to achieve the goals of learning Arabic. Starting from this, eclectic method was born as central axis to provide various alternative methods combined to support each other in achieving the goals of learning Arabic. There were, in the past, facts showing that the causes of failures of learning foreign languages were, among others, teachers’ capability to select proper and attracting methods. This statement showed that the cause was the inappropriateness of method selection which led to students’ desperation. Finally, some recommendations will be presented to enhance Arabic language learning.


2021 ◽  
Author(s):  
◽  
Elspeth Hocking

<p>Public history and academic history have been viewed both as opposites, two practices related only by their concern with sharing the past, as well as conceptualised as similar fields with close connections to each other. Museum history exhibitions are an obvious example of public history in action. However, is the history that exhibitions present all that different from what is produced in the academy, or is this history academia in another form? Initially this dissertation aimed to explore the relationships between academic and public histories as discipline and practice, assuming a relationship rather than divide between the two fields as suggested in some of the literature. However, the eventual results of the research were different than expected, and suggested that in fact public histories manifest very differently to academic histories within a museum context. Using an adapted ethnographic research methodology, this dissertation traces the development of a single history exhibition, "Te Ahi Kā Roa, Te Ahi Kātoro Taranaki War 1860–2010: Our Legacy – Our Challenge", from its concept development to opening day and onwards to public programmes. This exhibition opened at Puke Ariki in New Plymouth in March 2010, and was a provocative display not only of the history of the wars themselves, but of the legacy of warfare in the Taranaki community. Other methods include partially structured interviews which were conducted with ten people involved in creating this exhibition, who outlined their roles in its production and provided their views on its development, and also a brief analysis of the broader social and historical context in which the exhibition was staged. Through tracing the creation of this history, the findings suggested that the history produced at Puke Ariki is a history in its own right, with noticeable differences from academic histories. The strongest correlation between public and academic history in this instance was the shared aspiration to be rigorous in conducting research and, as far as possible, to create an accurate portrayal of the past. Otherwise the history created by Puke Ariki through the exhibition proved to be different in that it was deliberately designed to be very accessible, and it utilised a number of presentation modes, including objects, text, audiovisual and sound. It was interactive, and had a clear aim of enabling the audience to participate in a discussion about the history being presented. Finally, it was a highly politicised history, in that decision making had to be negotiated with source communities in a collaborative fashion, and issues of censorship worked through with the council, a major funding source. The dissertation concludes that producing history in a museum context is a dynamic and flexible process, and one that can be successful despite not necessarily following theoretical models of exhibition development.</p>


2008 ◽  
Vol 367 ◽  
pp. 193-200
Author(s):  
Branko Grizelj ◽  
M. Plancak ◽  
Branimir Barisic

The paper analyses the process of simulation forward-backward extrusion. In metal forming industries, many products have to be formed in large numbers and with highly accurate dimensions. To save energy and material it is necessary to understand the behavior of material and to know the intermediate shapes of the formed parts and the mutual effects between tool and formed party during the forming process. These are normally based on numerical methods which take into account all physical conditions of the deformed material during the process. For this purpose, the finite element method has been developed in the past in different ways. The paper highlights the finite element simulation as a very useful technique in studying, where there is a generally close correlation in the load results obtained with finite elements method and those obtained experimentally.


2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Ruchika Mittal ◽  
Gauri Srivastava ◽  
Deepak Ganjewala

Abstract Monoterpenes, a class of isoprenoid compounds, are extensively used in flavor, fragrance, perfumery, and cosmetics. They display many astonishing bioactive properties of biological and pharmacological significance. All monoterpenes are derived from universal precursor geranyl diphosphate. The demand for new monoterpenoids has been increasing in flavor, fragrances, perfumery, and pharmaceuticals. Chemical methods, which are harmful for human and the environment, synthesize most of these products. Over the years, researchers have developed alternative methods for the production of newer monoterpenoids. Microbial biotransformation is one of them, which relied on microbes and their enzymes. It has produced many new desirable commercially important monoterpenoids. A growing number of reports reflect an ever-expanding scope of microbial biotransformation in food and aroma industries. Simultaneously, our knowledge of the enzymology of monoterpene biosynthetic pathways has been increasing, which facilitated the biotransformation of monoterpenes. In this article, we have covered the progress made on microbial biotransformation of commercial monoterpenes with a brief introduction to their biosynthesis. We have collected several reports from authentic web sources, including Google Scholar, Pubmed, Web of Science, and Scopus published in the past few years to extract information on the topic.


2007 ◽  
Vol 44 (04) ◽  
pp. 212-225
Author(s):  
Lior Banai ◽  
Omri Pedatzur

Stiffened plates form the backbone of most of a ship's structure. Today, finite element (FE) models are used to analyze the behavior of such structural elements for different types of loads. In the past, when usage of computers and FE models were not used very much, analytical analysis methods were required. Two well-known methods have been developed for analyses of stiffened plates under lateral loading (uniform pressure), based on two different models, namely, the orthotropic plate model and the grillage model. Both models can give estimations for the maximum plate deflection under uniform lateral pressure. The objective of this paper is to present the two methods, evaluate and compare the methods using the finite element method, and finally implement the methods as a computer program for quick estimations of the maximum deflection of stiffened plates. The degree of accuracy of the two methods when compared to FE is discussed in some detail.


2019 ◽  
Vol 242 ◽  
pp. 349-375 ◽  
Author(s):  
Sheena Chestnut Greitens ◽  
Rory Truex

AbstractThis paper examines the nature of China's current research climate and its effects on foreign scholarship. Drawing on an original survey of over 500 China scholars, we find that repressive research experiences are a rare but real phenomenon and collectively present a barrier to the conduct of research in China. Roughly 9 per cent of China scholars report that they have been “invited to tea” by authorities within the past ten years; 26 per cent of scholars who conduct archival research report being denied access; and 5 per cent of researchers report some difficulty obtaining a visa. The paper provides descriptive information on the nature of these experiences and their determinants. It concludes with a discussion of self-censorship and strategies for conducting research on China.


Foods ◽  
2020 ◽  
Vol 9 (8) ◽  
pp. 1069 ◽  
Author(s):  
Abdo Hassoun ◽  
Ingrid Måge ◽  
Walter F. Schmidt ◽  
Havva Tümay Temiz ◽  
Li Li ◽  
...  

Animal origin food products, including fish and seafood, meat and poultry, milk and dairy foods, and other related products play significant roles in human nutrition. However, fraud in this food sector frequently occurs, leading to negative economic impacts on consumers and potential risks to public health and the environment. Therefore, the development of analytical techniques that can rapidly detect fraud and verify the authenticity of such products is of paramount importance. Traditionally, a wide variety of targeted approaches, such as chemical, chromatographic, molecular, and protein-based techniques, among others, have been frequently used to identify animal species, production methods, provenance, and processing of food products. Although these conventional methods are accurate and reliable, they are destructive, time-consuming, and can only be employed at the laboratory scale. On the contrary, alternative methods based mainly on spectroscopy have emerged in recent years as invaluable tools to overcome most of the limitations associated with traditional measurements. The number of scientific studies reporting on various authenticity issues investigated by vibrational spectroscopy, nuclear magnetic resonance, and fluorescence spectroscopy has increased substantially over the past few years, indicating the tremendous potential of these techniques in the fight against food fraud. It is the aim of the present manuscript to review the state-of-the-art research advances since 2015 regarding the use of analytical methods applied to detect fraud in food products of animal origin, with particular attention paid to spectroscopic measurements coupled with chemometric analysis. The opportunities and challenges surrounding the use of spectroscopic techniques and possible future directions will also be discussed.


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