Friction Welding Structures of Carburized Steels

2010 ◽  
Vol 638-642 ◽  
pp. 3781-3786 ◽  
Author(s):  
Ion Mitelea ◽  
Corneliu Marius Crăciunescu
Keyword(s):  
Friction Welding ◽  
Intermetallic Phases ◽  
Rotational Energy ◽  
Manufacturing Industries ◽  
Critical Problem ◽  
High Reproducibility ◽  
Structural Morphology ◽  
The Core ◽  
Friction Energy ◽  
Different Characteristics

Friction welding is one of the most reliable joining techniques for various materials due to a high reproducibility, lack of ecological treats and a relatively narrow thermomecanical affected zone. It offers multiple applicative opportunities in various fields – from automotive and manufacturing industries as well as for special destinations – leading to incontestable technical and economical advantages. However, the friction welding of materials with compositional and/or structural gradients is a critical problem due to the high probability of cracks occurrence, the formation of intermetallic phases that increase the brittleness and a high gradient for residual stresses. The paper refers to the particularities of graded welds through which the rotational energy will be transformed by friction into heat in the surface layer with a certain structural morphology, as well as in the core with different characteristics. Experiments have been performed in order to assess the process parameters which provide the optimal friction energy for an adequate plastifiation of the materials. Macro and optical micrographic investigations corroborated with electron microscopy and hardness measurements provide information concerning the hardening of the thermomecanically affected zone and the formation of seam as result of expulsion of the carburized layer.

scholarly journals Meta-User2Vec model for addressing the user and item cold-start problem in recommender systems

2020 ◽  
Author(s):  
Joanna Misztal-Radecka ◽  
Bipin Indurkhya ◽  
Aleksander Smywiński-Pohl
Keyword(s):  
Cold Start ◽  
Spatial Relations ◽  
Online News ◽  
Multidimensional Space ◽  
Critical Problem ◽  
Efficient Alternative ◽  
Factorization Machine ◽  
Different Characteristics ◽  
News Services ◽  
Cold Start Problem

Abstract The cold-start scenario is a critical problem for recommendation systems, especially in dynamically changing domains such as online news services. In this research, we aim at addressing the cold-start situation by adapting an unsupervised neural User2Vec method to represent new users and articles in a multidimensional space. Toward this goal, we propose an extension of the Doc2Vec model that is capable of representing users with unknown history by building embeddings of their metadata labels along with item representations. We evaluate our proposed approach with respect to different parameter configurations on three real-world recommendation datasets with different characteristics. Our results show that this approach may be applied as an efficient alternative to the factorization machine-based method when the user and item metadata are used and hence can be applied in the cold-start scenario for both new users and new items. Additionally, as our solution represents the user and item labels in the same vector space, we can analyze the spatial relations among these labels to reveal latent interest features of the audience groups as well as possible data biases and disparities.

Research on the Metadata Storage Mode and Efficiency of Distributed File System Based on HGML

2010 ◽  
Vol 40-41 ◽  
pp. 221-227 ◽  
Author(s):  
Fang Miao ◽  
Fu Chao Cheng ◽  
Wen Hui Yang ◽  
Li Tan
Keyword(s):  
Spatial Data ◽  
File System ◽  
Distributed File System ◽  
Entire System ◽  
The Core ◽  
Different Characteristics ◽  
Massive Spatial Data ◽  
Access Efficiency

In the G / S mode, in order to meet the storage demands of massive spatial data, the requirements of the distributed file system (DFS) on back-end servers are extremely high. As one of the core tasks of DFS, the metadata storage is the necessary premise which ensures the reliability and efficiency of the entire system. This paper introduces a metadata storage mode based on HGML, and then designs and implements two solutions, which are scattered storage and integrated storage. According to the different characteristics of the two solutions, access efficiency of the metadata has been tested respectively. The result shows that the new metadata storage mode can basically satisfy the storage demands of massive spatial data.

scholarly journals Optimization of electric vehicle based on triboelectric nanogenerator

2020 ◽  
Vol 170 ◽  
pp. 01027
Author(s):  
Sumit Bhamre ◽  
Sainath Mali ◽  
Chittaranjan Mane
Keyword(s):  
Electric Vehicle ◽  
Theoretical Calculations ◽  
Mechanical Energy ◽  
Triboelectric Nanogenerator ◽  
Plastic Sheet ◽  
The Core ◽  
Battery Capacity ◽  
Promising Solution ◽  
Friction Energy ◽  
Wasted Energy

Triboelectric Nanogenerator is a newly invented energy harvesting technology which converts external mechanical energy into electricity based on universally accepted triboelectric principle. In this research paper we have developed an easy way to produce Triboelectric Nanogenerator by using easily available material such as Kapton, Polyethylene Terephthalate (PET Plastic Sheet) and Aluminium Foil unlike more complex material such as Polydimethylsiloxane (PDMS) used by the core researchers. We have also designed and developed a sheet of Triboelectric Nanogenerator and implemented it on electric vehicle and observed the scavenging of friction energy from rolling tyres and also calculated that how much energy Triboelectric Nanogenerator can produce. This successful demonstration of Triboelectric Nanogenerator on wheel and its theoretical calculations provides a promising solution to scavenging the wasted energy of the vehicle and use this wasted energy to increase the battery capacity and range of electric vehicle.

scholarly journals Experiences with distributed computing for meteorological applications: Grid computing and Cloud computing

2015 ◽  
Vol 8 (2) ◽  
pp. 1171-1199 ◽  
Author(s):  
F. Schüller ◽  
S. Ostermann ◽  
R. Prodan ◽  
G. J. Mayr
Keyword(s):  
Distributed Computing ◽  
Grid Computing ◽  
High Performance ◽  
Cost Effective ◽  
Use Case ◽  
The Core ◽  
Wide Range ◽  
Different Characteristics ◽  
Performance Computing ◽  
Computing Capacity

Abstract. Experiences with three practical meteorological applications with different characteristics are used to highlight the core computer science aspects and applicability of distributed computing to meteorology. Presenting Cloud and Grid computing this paper shows use case scenarios fitting a wide range of meteorological applications from operational to research studies. The paper concludes that distributed computing complements and extends existing high performance computing concepts and allows for simple, powerful and cost effective access to computing capacity.

scholarly journals Space Structure of Rumah Panjang (Radakng) of Dayak Kanayatn People in West Kalimantan

ARTic ◽  
2020 ◽  
Vol 3 (1) ◽  
pp. 249-258
Author(s):  
Mario Mario ◽  
Widagdo Widagdo
Keyword(s):  
Community Service ◽  
Small Groups ◽  
Space Structure ◽  
Musical Instruments ◽  
Traditional Values ◽  
West Kalimantan ◽  
The Core ◽  
Descriptive Approach ◽  
Different Characteristics ◽  
Ways Of Life

Dayak people live on the island of Kalimantan and live in groups such as, Iban, Kayan, Bidayuh, Kanayatn and other groups scattered in small groups and have different characteristics from each other. They live in longhouse (rumah panjang ) the traditional houses that have space for some families to live in. The problem is that many People of Kalimantan do not use rumah panjang  as a place to live, this is due to various factors, such as technological and economic advances that have an impact on changing ways of life. Rumah panjang has traditional values to be preserved as a cultural treasure of Indonesia. If the values of the tradition are extinct along with the loss of (radakng) rumah panjang  in West Kalimantan also lost the wealth of Indonesia. The research was conducted to find out the structure of the division of the room from the rumah panjang (radakng) building. A descriptive approach is used to describe parts of the rumah panjang (radakng). The results of the study are rumah panjang (radakng) consisting of Pante (outer terrace), Sami (porch or inner terrace), Bilik (core room of (radakng) longhouse), Jungkar (kitchen) and Dango (barn), there is also a part of the house that does not blend with the core house and each part of the room has a diverse function and rumah panjang as a place of growth of various cultural heritage such as traditional ceremonies, beliefs, dances, musical instruments and gotong royong (community service).

The Core Applications and Experience of Typical 3G Operators

2011 ◽  
Vol 204-210 ◽  
pp. 1536-1539
Author(s):  
Xia Chen ◽  
Ting Jie Lu
Keyword(s):  
Mobile Phones ◽  
Integrated Services ◽  
Multilateral Cooperation ◽  
The Core ◽  
Industrial Chain ◽  
Personalized Services ◽  
Personal Assistant ◽  
Different Characteristics

3G applications have developed rapidly in some countries. The experience of operating 3G core applications from some operators is worth learning. This paper summarized five main principles based on describing the core applications of typical 3G operators: 1. Provide personalized services: provide practical services to meet the needs of customers in all aspects, act as customers’ personal assistant; 2. Provide personalized and customized services, according to the needs of different customers: According to the different characteristics of different customers, customize personalized services; 3. Provide integrated services: connect mobile phones with other tools, develop converged services; 4. Innovate services continuously: Combine with the original advantages of the companies, innovate services continuously, seek for the development of differentiation; 5. Expand the cooperation among the industrial chain, attract and develop customers: make multilateral cooperation, provide a variety of services and promote mutual development of the industry.

scholarly journals Experiences with distributed computing for meteorological applications: grid computing and cloud computing

2015 ◽  
Vol 8 (7) ◽  
pp. 2067-2078 ◽  
Author(s):  
F. Oesterle ◽  
S. Ostermann ◽  
R. Prodan ◽  
G. J. Mayr
Keyword(s):  
Distributed Computing ◽  
Grid Computing ◽  
High Performance ◽  
Cost Effective ◽  
Use Case ◽  
The Core ◽  
Wide Range ◽  
Different Characteristics ◽  
Performance Computing ◽  
Computing Capacity

Abstract. Experiences with three practical meteorological applications with different characteristics are used to highlight the core computer science aspects and applicability of distributed computing to meteorology. Through presenting cloud and grid computing this paper shows use case scenarios fitting a wide range of meteorological applications from operational to research studies. The paper concludes that distributed computing complements and extends existing high performance computing concepts and allows for simple, powerful and cost-effective access to computing capacity.

How Realistic Should Avatars Be?

2015 ◽  
Vol 27 (3) ◽  
pp. 109-117 ◽  
Author(s):  
Thomas W. James ◽  
Robert F. Potter ◽  
Sungkyoung Lee ◽  
Sunah Kim ◽  
Ryan A. Stevenson ◽  
...  
Keyword(s):  
Blood Oxygen Level Dependent ◽  
Functional Magnetic Resonance ◽  
Blood Oxygen Level ◽  
Differential Processing ◽  
The Core ◽  
The People ◽  
The Face ◽  
Animal Faces ◽  
Human Faces ◽  
Different Characteristics

Abstract. Increased interaction with characters in games and online necessitates a better understanding of how different characteristics of these agents impact media users. This paper investigates a possible neurological underpinning for a common research finding – namely, that animated characters designed to be comparatively more human, more real, and more similar to the people they represent elicit more positive self-reported evaluations. The goal of this study was to examine the extent to which these results might be due to differential processing of character features in brain networks recruited for face recognition. There is some evidence that parts of the face network may be specifically tuned for real human faces. An experiment was conducted where participants viewed photographs of faces of actual agents (humans and animals) or colored drawings of matched agents (cartoon humans and animals). Using functional magnetic resonance imaging (fMRI) to measure blood oxygen-level dependent (BOLD) activation in the whole brain and specifically in the face network, we investigated the variation in patterns of activation with human and animal faces that were more or less real. The results were consistent with previous reports that the core regions of the face network are sensitive to the humanness of faces. However, our results extended previous work by showing that regions of the core and extended regions of the face network – and some regions outside the network – were sensitive to realism, but only realism of human faces.

scholarly journals Friction Hydro Pillar Processing: Characteristics and Applications

2015 ◽  
Vol 20 (3) ◽  
pp. 287-299 ◽  
Author(s):  
Diogo Trento Buzzatti ◽  
Jonas Trento Buzzatti ◽  
Rafael Eugenio dos Santos ◽  
Fabiano Mattei ◽  
Mariane Chludzinski ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Real Time ◽  
Friction Welding ◽  
Production Cost ◽  
Processing Time ◽  
Production Systems ◽  
Welding Process ◽  
Thick Plates ◽  
High Productivity ◽  
Different Characteristics

Abstract The friction welding process is shown as an effective alternative compared to the conventional methods of joining materials, in particular Friction Hydro Pillar Processing (FHPP). With the use of automated equipment joints are produced with reliable quality and repeatability, making it possible to follow in real time the welding process. The study of the application of this process in different materials proves its use in production systems. The development of several lines of research shows that even varying materials and geometry of joints with at least 20 mm deep in thick plates, the processing time remains less than 6 (six) minutes. Furthermore, as a result joints with suitable metal/mechanical properties are made with low production cost and high productivity, even for materials with low weldability and with different characteristics. In this work will be presented various materials joined by FHPP, as well as its advantages and applicability.

Robert Louis Stevenson and the Art of Collaboration

2019 ◽  
Author(s):  
Audrey Murfin
Keyword(s):  
Victorian Literature ◽  
Robert Louis Stevenson ◽  
Critical Problem ◽  
Scottish Literature ◽  
Arabian Nights ◽  
The Core ◽  
Literary Reputation ◽  
Linked Stories ◽  
Literary Collaboration ◽  
Successful Author

Robert Louis Stevenson, Collaboration, and the Construction of the Late-Victorian Author argues that understanding literary collaboration is essential to understanding Stevenson’s writings. Stevenson often collaborated with family and friends, sometimes acknowledged, and sometimes not. Early collaborations include three plays with his friend W. E. Henley. Later, he and his wife Fanny co-authored a volume of linked stories, More New Arabian Nights, also titled The Dynamiter (1885). Fanny also contributed to other work that did not bear her name, significantly the Strange Case of Dr Jekyll and Mr Hyde (1886), and he drew on her diaries for his Pacific writings. He collaborated most extensively with his stepson, Lloyd Osbourne, with whom he wrote three novels: The Wrong Box (1889), The Wrecker (1892), and The Ebb-Tide (1894). Stevenson’s collaborations with Osbourne typify the critical problem my project addresses. Like Fanny Stevenson’s, Osbourne’s literary reputation has not been notable. Furthermore, there is evidence that Stevenson’s collaborations with Osbourne became frustrating. The core question this book addresses is this: why would this famous and successful author of Scottish literature practice a creative process that burdened him with inexpert collaborators? The answer to this question can be found in Stevenson’s novels, essays and plays, which dramatize the process of collaboration. Stevenson creates an alternate narrative of what it means to write—one that challenges commonly held assumptions about the celebrity cult of the author in Victorian literature, and notions of authorship more generally.

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