scholarly journals Advances in Multi-Process Hybrid Production Cells for Rapid Individualised Laser-Based Production

2021 ◽  
Vol 11 (4) ◽  
pp. 1812
Author(s):  
Juan Carlos Pereira ◽  
Ramón Moreno ◽  
Christian Tenbrock ◽  
Arnold Herget ◽  
Thomas Wittich ◽  
...  
Keyword(s):  
Data Management ◽  
Research Work ◽  
Automated Manufacturing ◽  
Modular Architecture ◽  
Machining Processes ◽  
Hybrid Production ◽  
Hybrid Concept ◽  
Subtractive Machining ◽  
Removal System ◽  
Made In

In this paper, the approach and main advances made in multi-process hybrid production cells (HyProCell) for rapid individualised laser-based production are compiled and discussed, including highlights and achievements. HyProCell constructs automated manufacturing platforms that integrate highly flexible laser-based additive build processes with more conventional yet precise subtractive machining processes and include novel solutions like automatic powder removal system/machines and robot arms in integrated multi-process production cells. The HyProCell approach can either build parts additively from scratch and finish them in a coherent production single line/cell or prepare parts by machining and add laser-based additive features, achieving otherwise impossible shapes. In addition to producing new parts, existing parts can be repaired or improved by adding new details with the HyProCell hybrid concept. The research work includes the design of pilot cell facilities, the development of the, and a new modular architecture including a middleware and integration layer to ensure automation with improved pallet handling systems. Finally, the MES and data management methodologies for future improvements and pilot facility implementation were made.

Data Management in an Epidemiological Study : Experiences from the Iowa 500 Field Follow-up and Family Study

1980 ◽  
Vol 19 (01) ◽  
pp. 37-41
Author(s):  
R. F. Woolson ◽  
M. T. Tsuang ◽  
L. R. Urban
Keyword(s):  
Data Management ◽  
Epidemiological Study ◽  
Family Study ◽  
Data Sets ◽  
Data Handling ◽  
Management Decisions ◽  
Numerous Data ◽  
Made In

We are now conducting a forty-year follow-up and family study of 200 schizophrenics, 325 manic-depressives and 160 surgical controls. This study began in 1973 and has continued to the present date. Numerous data handling and data management decisions were made in the course of collecting the data for the project. In this report some of the practical difficulties in the data handling and computer management of such large and bulky data sets are enumerated.

A Comparative Study of Tribological Behavior of Steel Sliding Against WC Under Mineral and Biodegradable Oil Lubrication

2012 ◽  
Author(s):  
Anup Darshan ◽  
UmaMaheshwera Reddy Paturi ◽  
Narala Suresh Kumar Reddy ◽  
Srinivasa Prakash Regalla
Keyword(s):  
Tribological Properties ◽  
Positive Impact ◽  
Research Work ◽  
Mineral Oil ◽  
Optical Microscope ◽  
Machining Processes ◽  
Alternative Source ◽  
Pin On Disc ◽  
Steel Disc ◽  
Machining Operations

Now a days for machining operations apart from good tribological properties, the lubricant is also expected to be non-hazardous and non-polluting. When considering the ecological and environmental aspects in machining processes, the use of biodegradable oil can be an alternative source of lubricant due to its positive impact to employee health and environmental pollution. In this regard, our research work uses vegetable based cutting fluids developed from canola and sunflower oil, in an attempt to provide an eco-friendly environment. Experiments are carried out on a pin-on-disc tribometer with tungsten carbide (WC) pin against AISI 4340 steel disc for different sliding times under different environments, thus simulating the machining environment. The tribological properties, wear and friction of vegetable based oils were comparatively investigated with a commercially available mineral oil. Wear tracks and roughness profiles of test specimens were compared by using optical microscope and profilometer respectively. Results indicated that vegetable based canola oil demonstrated excellent tribological properties compared to that of commercial mineral oil.

scholarly journals TERMISUL E INFORMÁTICA: CAMINHO PERCORRIDO E HORIZONTE A ALCANÇAR

Organon ◽  
2011 ◽  
Vol 25 (50) ◽  
Author(s):  
Anna Maria Becker Maciel
Keyword(s):  
Data Management ◽  
Research Work ◽  
Cooperative Work ◽  
Digital Resources ◽  
Ongoing Research ◽  
Computer Scientists

This paper reports on the quest for the interface between Terminology, Informaticsand the Termisul Project. Three landmarks highlight the account, DOS, Windows, and Internet.They characterize the steps of a team of linguists towards the computerized era. As far as thetechnology advanced, their perception of digital resources changed from being mereoperational help in data management to representing sophisticated tools assisting research andeventually to the demand of cooperative work with computer scientists. The difficulties of theearly stages encountered in the path tread are remembered. The meaningful results of theefforts taken are described. The challenges of the ongoing research work are outlined.

scholarly journals EFFECT OF SPANDEX DENIER OF WEFT CORE SPUN YARN ON PROPERTIES OF FINISHED STRETCH WOVEN FABRIC

2020 ◽  
Vol 7 (7) ◽  
pp. 21-32
Author(s):  
Sunny Pannu ◽  
Meenakshi Ahirwar ◽  
Rishi Jamdigni ◽  
B. K. Behera
Keyword(s):  
Research Work ◽  
Woven Fabrics ◽  
Woven Fabric ◽  
The Core ◽  
Spun Yarn ◽  
Spun Yarns ◽  
Recovery Percentage ◽  
Shape Retention ◽  
Dual Core ◽  
Made In

The woven fabrics containing cotton/spandex core spun yarns possesses very vital properties of stretch, recovery and thus shape retention from the view point of wearing comfort and garment appearance. Spandex present in the core of core spun yarn is the most essential performer behind these properties. An attempt is made in this research work to study the influence of changing spandex denier in core spun yarn on the stretch and functional properties of stretch woven fabrics. The sole objective of this study is to find out whether different stretch, shrinkage and physical properties of stretch woven fabrics depend upon changing spandex percentage achieved by means of change in spandex filament denier. It was observed that by increasing denier of spandex in core spun weft yarns the increase in weft shrinkage diminishes. Dual core weft with spandex provides good elongation percentage and recovery percentage. The fabric with higher denier spandex in yarn shows a decreasing total hand values trend for summer and winter. The results depicts that the fabrics have higher THV for winter suiting fabrics as compared to summer suiting thus are more suitable for the winter wear.

scholarly journals ORGANIZATION OF STUDENTS’ RESEARCH WORK IN A FOREIGN LANGUAGE

2019 ◽  
Vol 1 (16) ◽  
pp. 105-111
Author(s):  
H.M Shalatska
Keyword(s):  
Foreign Language ◽  
Research Work ◽  
Gradual Transition ◽  
Student Writing ◽  
Student Research ◽  
Language Class ◽  
Study Results ◽  
Language Classes ◽  
Language Environment ◽  
Made In

The article considers the peculiarities of the organization of students’ research work in a technical university in foreign language classes with a gradual transition from simple forms of research to more complex ones, which is aimed at the harmonious development and improvement future specialists’ skills and abilities. The purpose of this article is to identify the main problems of the organization of students’ research work in a foreign language and consider ways of improving this process. Special attention is paid to the tasks, functions, components and various forms of students' research work. The researcher describes the possibility of using assignments for research work and organizing their performing by students in a foreign language class, in particular, such tasks as writing a summary of the text proposed by the teacher, corresponding to the student’s specialization, drawing up a plan for it, drawing up terminological dictionaries, preparing reports on a given topic, writing creative works, essays, drawing up tables and diagrams, solving problematic issues related to the future profession of a student, writing abstracts,  preparing the presentation of study' results. The involvement students in the work of scientific conferences, seminars, competitions, contests, and meetings with leading foreign experts are encouraged. The defense of master's and diploma projects in a foreign language prepares the student for the exercise of profession and integration into a foreign language environment. The examples of the most common mistakes made in the preparation of research works, which indicate the lack of students’ research skills formation are given, and ways to overcome them are recommended. The conclusions are related and future works are suggested. Thus, it also possible to create an education plans of student’ research work in foreign language and recommendations for the specific academic curriculum.

Transient Radiative Transfer in Anisotropically Scattering Media Using Monotonicity-Preserving Schemes

2000 ◽  
Author(s):  
M. Sakami ◽  
K. Mitra ◽  
P.-F. Hsu
Keyword(s):  
Radiative Transfer ◽  
Research Work ◽  
Discrete Ordinates ◽  
Scattering Media ◽  
Discrete Ordinates Method ◽  
Piecewise Parabolic ◽  
Phase Functions ◽  
Monotonicity Preserving ◽  
Made In ◽  
Thick Medium

Abstract This research work deals with the analysis of transient radiative transfer in one-dimensional scattering medium. The time-dependant discrete ordinates method was used with an upwind monotonic scheme: the piecewise parabolic scheme. This scheme was chosen over a total variation diminishing version of the Lax-Wendroff scheme. These schemes were originally developed to solve Eulerian advection problem in hydrodynamics. The capability of these schemes to handle sharp discontinuity in a propagating electromagnetic wave front was compared. The accuracy and the efficiency of the discrete ordinates method associated with the piecewise parabolic advection scheme were studied. Comparisons with Monte Carlo and integral formulation methods show the accuracy and the efficiency of this proposed method. Parametric study for optically thin and thick medium, different albedos and phase functions is then made in the unsteady state zone.

Influence of the manufacturing parameters of an AlMg5 wire–based hybrid production process on quality and mechanical properties

2021 ◽  
Author(s):  
Hans-Christian Möhring ◽  
Dina Becker ◽  
Rocco Eisseler ◽  
Thomas Stehle ◽  
Tim Reeber
Keyword(s):  
Mechanical Properties ◽  
Production Process ◽  
Complex Geometry ◽  
Lightweight Design ◽  
Dimensional Accuracy ◽  
Manufacturing Processes ◽  
Shape Accuracy ◽  
Hybrid Production ◽  
Traditional Manufacturing ◽  
Subtractive Machining

AbstractHybrid manufacturing processes are known for combining the advantages of additive manufacturing and more traditional manufacturing processes such as machining to create components of complex geometry while minimising material waste. The trend towards lightweight design, especially in view of e-mobility, gives aluminium materials an important role to play. This study examines the use of aluminium alloys in laser metal wire deposition (LMWD) processes with subsequent subtractive machining, which is considerably more difficult due to the different process-related influences. The investigations are focussed on the influence of the differently controlled laser power on the shape accuracy, the microstructure, and the hardness of the AlMg5 test components after the LMWD process with subsequent subtractive machining by turning. The long-term goal of the investigations is to increase the stability of the hybrid production process of AlMg5 components with defined dimensional accuracy and mechanical properties.

XML Data Management in Object Relational Database Systems

2010 ◽  
pp. 18-46
Author(s):  
Zhen Hua Liu ◽  
Anguel Novoselsky ◽  
Vikas Arora
Keyword(s):  
Data Management ◽  
Research Work ◽  
Database Systems ◽  
Xml Data ◽  
Significant Research ◽  
Object Relational ◽  
Pros And Cons ◽  
Relational Database Systems ◽  
Xml Indexing ◽  
Xml Data Management

Since the advent of XML, there has been significant research into integrating XML data management with Relational DBMS and Object Relational DBMS (ORDBMS). This chapter describes the XML data management capabilities in ORDBMS, various design approaches and implementation techniques to support these capabilities, as well as the pros and cons of each design and implementation approach. Key topics such as XML storage, XML Indexing, XQuery and SQL/XML processing, are discussed in depth presenting both academic and industrial research work in these areas.

On the X-Ray Diffraction Method of Measurement of Triaxial Stresses with Particular Reference to the Angle 2θo

1982 ◽  
Vol 26 ◽  
pp. 245-253 ◽  
Author(s):  
S. Torbaty ◽  
J.M. Sprauel ◽  
G. Maeder ◽  
P.H. Markho
Keyword(s):  
Shear Stress ◽  
Diffraction Method ◽  
Medium Carbon Steel ◽  
X Ray Diffraction ◽  
Machining Processes ◽  
Distribution Diagram ◽  
Medium Carbon ◽  
Triaxial Stresses ◽  
Annealed Powder ◽  
Made In

AbstractCertain machining processes (e.g. turning, grinding, …) lead to a splitting up and an opening out of the curve of 2θ ϕ ψ = f (sin2ψ). In order to determine the complete stress tensor, it is necessary in this case to use the Dölle-Cohen method but this requires the knowledge of the diffraction angle 2θo for the unstressed material. Such a material, however, is extremely difficult to obtain in practice and the method usually employed uses annealed powder for this measurement. In our study, we show that it is nevertheless possible to determine the angle 2θo on a specimen for which the curve of 2θ ϕ ψ = f (sin2ψ) does not open out. Applying the Dölle-Cohen method to turning of a medium carbon steel, we have been able to bring to the fore: (i) the presence of an opening out of the curve 2θ ϕ ψ = f (sin2ψ), for measurements made in the direction of lay, which is attributed to a shear stress σ23, and (ii) shear stress σ12 which causes a rotation of the stress distribution diagram σϕ = f(ϕ) in the plane of the specimen.

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