scholarly journals Exploratory development of a rotary offset crusher

2021 ◽  
Vol 121 (1) ◽  
Author(s):  
T. Nghipulile ◽  
M. Bwalya ◽  
M. Moys ◽  
H. Simonsen
Keyword(s):  
Circuit Optimization ◽  
Original Design ◽  
Metal Production ◽  
Cost Component ◽  
Lower Face ◽  
Key Factor ◽  
Conical Section ◽  
The University ◽  
Ongoing Concern ◽  
Production Industry

SYNOPSIS The quest for efficiency in comminution is an ongoing concern as comminution usually constitutes a major cost component in the metal production industry. Such improvements can be made by circuit optimization or development of more efficient equipment. A novel crusher, known as the rotary offset crusher (ROC), promises to deliver in this space. The ROC was invented in 2002 by Michael Hunt, Henry Simonsen, and Ian Sinclair, but failed to garner enough support to progress to production. The original design concept was recently rekindled, and a laboratory version of the crusher has been built and commissioned at the University of the Witwatersrand. The crusher is simple in design, with two cylindrical discs that are parallel to each other, and, as the name implies, there is an offset between the vertical axes of the discs. The top disc has a conical section on its lower face, and this creates a crushing zone between the opposite faces of the two spinning discs. Centrifugal motion transports particles through the crushing zone. Batch experiments have been conducted with quartz at various crusher settings (discs offset, rotational speed, and vertical exit gap) for various feed size distributions. The indications so far suggest that the disc speed is a key factor affecting the performance. Size reduction ratios as high as 11 were recorded from experiments with quartz at a speed of 830 r/min. Keywords: rotary offset crusher, comminution, throughput.

scholarly journals Soil management effect on soil penetration resistance in the vineyard

2013 ◽  
Vol 44 (2s) ◽  
Author(s):  
Pietro Catania ◽  
Mariangela Vallone ◽  
Felice Pipitone ◽  
Gioacchino Francesco Argento ◽  
Giuseppe Spartà ◽  
...  
Keyword(s):  
Penetration Resistance ◽  
Soil Water Storage ◽  
Arid Environments ◽  
Water Storage Capacity ◽  
Soil Penetration Resistance ◽  
Key Factor ◽  
Soil Water Storage Capacity ◽  
The University ◽  
Steep Slopes ◽  
Semi Arid

In environments characterized by steep slopes or arranged in terraces, among the shallow tillage systems, rototilling is extensively used. However, the effect of the repeated use of rototilling has a considerable influence on soil characteristics; it appears finely powdered, soft and without structure. In order to limit these inconveniences, an innovative self-propelled machine equipped with working tools as a spade, to be used in steep slopes or arranged in terraces areas, was designed by the Mechanics Section of the SAF (Scienze Agrarie e Forestali) Department of the University of Palermo in cooperation with Agrotec company, Padua, Italy. The aim of this study is to compare the effects of three machines for shallow tillage: a chisel plough (CP), a rototilling (RT) and a spading machine (SM) on penetration resistance in semi-arid environments of the Mediterranean basin. No tillage was also included. Penetration resistance (PR) was surveyed for all the treatments to a depth of 300 mm with an electronic dynamometer. The treatments consisted in the execution of a shallow tillage to a depth of 150 mm. SP treatment allowed us to obtain PR lower values throughout the tillage profile than RT, CP and NT. It follows that the type of machine used influences soil PR, and then the soil water storage capacity, key factor for the agricultural productions in semi-arid environments as in Sicily.

scholarly journals Universidad: NTIC, interacción y aprendizaje

2006 ◽  
pp. a061 ◽  
Author(s):  
Gerardo Meneses Benítez
Keyword(s):  
New Technologies ◽  
Teaching Tools ◽  
Starting Point ◽  
Key Factor ◽  
Nuevas Tecnologías ◽  
Information And Communication ◽  
The University ◽  
The Impact

El trabajo que se presenta tiene como punto de partida la percepción o valoración que todos hemos realizado al finalizar un curso o programa educativo de que se ha producido, o no,  un aprendizaje a lo largo del mismo - independientemente de su carácter presencial o virtual -. Se aborda esta situación mediante el estudio de la influencia de las nuevas tecnologías de la información y de la comunicación en la enseñanza en la universidad y de forma más específica por medio de una investigación que persigue la identificación y caracterización de la interacción como elemento clave en el aprendizaje.AbstractThis paper has, as a starting point, the appreciation and assessment we all have done at the end of a course or educative program we have assesst, whether or not, there’s been a learning throughout the whole program – apart from its virtual or presencial character-. The situation has been undertaken by means of the study of the influence the new technologies of information and communication, have in the university teachings and, more precisely, through the investigation that aims at the interactivity identification as a key factor in the learnings in teaching: tools contributions, things that might changes, the nature of the interactivity accomplishment, the impact, the insertion of the different elements...

Knowledge and Technology Transfer Support Potential of Intermediate Organizations

2015 ◽  
pp. 143-170 ◽  
Author(s):  
Tobias Kesting ◽  
Bernd Wurth
Keyword(s):  
Technology Transfer ◽  
Empirical Studies ◽  
Business Practice ◽  
University Environment ◽  
Technology Transfer Offices ◽  
Key Factor ◽  
Knowledge And Technology Transfer ◽  
Marketing Service ◽  
The University ◽  
Theoretical Considerations

This chapter aims at analyzing and optimizing the requirements of the internal environment regarding university-business cooperation (UBC). It focuses on university Technology Transfer Offices (TTOs), intermediate organizations embedded within the university environment. They support knowledge and technology transfer (KTT) activities, particularly the commercialization of research-based products. TTOs are supposed to accelerate and facilitate KTT from science into business practice. Although literature on university research commercialization highlights the relevance of transfer support by TTOs, empirical studies and KTT practice show that TTO services are used rather sparsely. Based on theoretical considerations and results of recent empirical studies on KTT, this chapter discusses two practice cases to derive indicators for a better exploitation of unused KTT support potential of TTOs. The results show that personal engagement aimed at a marketing service provider philosophy emerges as the key factor for fostering and intensifying cooperation between researchers and TTOs.

Approaching Leadership from a Lifelong Learning Perspective

2016 ◽  
pp. 315-334
Author(s):  
Marga Vives ◽  
Carmen Orte ◽  
Martí March
Keyword(s):  
Lifelong Learning ◽  
Economic Factor ◽  
The Elderly ◽  
Discussion Groups ◽  
Social Dimension ◽  
Educational Strategies ◽  
Cultural Adaptations ◽  
Intervention Models ◽  
Key Factor ◽  
The University

Lifelong learning is increasingly widespread in our society. Probably, the international increase of the elderly people, as a social group, could be a key factor. In its social dimension, ageing could be conceptualized in terms of real participation and contribution of the elders on several dimensions, as, currently, on the economic factor, where elders have become the most (and sometimes the only) economic pillar in their family. This chapter is focused on the development of the lifelong learning philosophy at the Universities, specifically on the University Programs for Seniors. We would like to reflect on different intervention models and on their principal features and quantitative and qualitative indicators, as educational strategies, student's and professors' expectations, systems of evaluation, cultural adaptations,...and the methodology of the systems of evaluation (internal and/or external qualitative agencies, interviews, discussion groups, mentoring,...) framed within the best practices.

scholarly journals ICT in agrarian sector of the CR

2012 ◽  
Vol 49 (No. 11) ◽  
pp. 540-542
Author(s):  
J. Vaněk ◽  
J. Jarolímek
Keyword(s):  
Czech Republic ◽  
Information And Communication Technologies ◽  
Communication Technologies ◽  
The Internet ◽  
Real Situation ◽  
The Czech Republic ◽  
Agrarian Sector ◽  
Key Factor ◽  
Information And Communication ◽  
The University

The fact that the development of information and communication technologies (ICT) is a key factor of development of individuals, regions, sectors and whole countries is well known at the beginning of the 21st century. The real situation of ICT utilization is very different in particular sections and it fails to reach standards that we would expect. The sphere of the agrarian sector of the Czech Republic is a very good example. The Information and Consulting Centre FEM at the University of Agriculture in Prague (IPC) has been participating on research of the utilization ICT in agriculture for three years. According to the latest data from July 2002, 55% of agrarian enterprises are connected to the Internet, which is much less than in other sectors.

Location Guided System of Training Solutions and Learning Itineraries Based on Competences Adapted to Users’ Needs

2011 ◽  
Vol 2 (2) ◽  
pp. 37-46
Author(s):  
Jose López-Ruiz ◽  
Pablo Lara-Navarra ◽  
Enric Serradell-Lopez ◽  
Josep Antoni Martínez-Aceituno
Keyword(s):  
Labour Market ◽  
Social Needs ◽  
Learning Needs ◽  
Starting Position ◽  
Key Factor ◽  
Model Of Competency ◽  
Market Needs ◽  
Training Expectations ◽  
The University ◽  
And Training

Competency design stands out among the methodological and educational model changes introduced by the EHEA (European Higher Education Area). This concept is a key factor when developing programs based on academic and professional profiles that respond to social and labour market needs. The UOC eLearning GPS is based on competences and is meant to reduce the gap between formal training and the reality of the labour market and social needs that traditionally has characterized the university. These aspects are the basis of this application. Using a language of competences, the application helps the students identify their main skills and capacities, as well as areas of improvement. Following the model of competency design, this tool helps the user detect and reduce the gap between a starting position of competence and his or her learning and training expectations. UOC eLearning GPS application offers solutions and learning itineraries closer to the user’s real learning needs.

scholarly journals Medicines Acceptability in Hospitalized Children: An Ongoing Need for Age-Appropriate Formulations

Pharmaceutics ◽  
2020 ◽  
Vol 12 (8) ◽  
pp. 766
Author(s):  
Thibault Vallet ◽  
Omar Elhamdaoui ◽  
Amina Berraho ◽  
Lalla Ouafae Cherkaoui ◽  
Yamna Kriouile ◽  
...  
Keyword(s):  
Local Context ◽  
Hospitalized Children ◽  
Multivariate Approach ◽  
Ibn Sina ◽  
Reference Framework ◽  
Oral Liquid ◽  
Key Factor ◽  
Age Appropriate ◽  
The Many ◽  
The University

Although knowledge on medicine acceptability remains fragmented, this multi-faceted concept has emerged as a key factor for compliance in pediatrics. In order to investigate the acceptability of medicines used in the University Medical Centre Ibn Sina (CHIS) of Rabat, Morocco, an observational study was conducted. Using a multivariate approach integrating the many aspects of acceptability, standardized observer reports were collected for 570 medicine intakes in patients up to the age of 16, then analyzed on a reference framework. Tablets appeared to be well accepted in children greater than 6 years old, but were crushed/dissolved for 90% of the 40 children aged from 3 to 5, and 100% of the 38 patients younger than 3. Moreover, the prescribed dose was fully taken for only 52% and 16% of these younger children, respectively. Despite this, tablets represented 24% of evaluations in children from 3 to 5 and 20% in infants and toddlers. Oral liquid preparations appeared to be better accepted than tablets in preschoolers, but not for those under 3. Overall, these findings highlight the lack of suitable alternatives for the younger children, especially for formulations of antiepileptics, antithrombotic, and psycholeptic agents in the local context.

Teaching and Continuing Professional Development: an Italian experience

2006 ◽  
Vol 44 (6) ◽  
Author(s):  
Giovanni Putoto
Keyword(s):  
Professional Development ◽  
Continuing Professional Development ◽  
Clinical Governance ◽  
University Hospital ◽  
New Paradigm ◽  
Italian Experience ◽  
Key Factor ◽  
Development Of Competencies ◽  
Knowledge Competencies ◽  
The University

AbstractContinuing Professional Development (CPD) is a key factor for effective implementation of Clinical Governance. The development of a quality system is, in fact, strictly related to the development of competencies of healthcare professionals. Lifelong learning has emerged as a new paradigm that underlines the need to maintain and continuously improve knowledge, competencies and attitudes in the changing scenario of healthcare systems. CPD accreditation is another fundamental issue and a variety of voluntary and compulsory approaches can be recognised at an international level. The experience of the University Hospital of Padova may be useful to demonstrate that CPD can be addressed to implement a Clinical Governance project.

A Case Study of Using Capstone Design as Basis for Curriculum-Wide Project-Based Learning

2011 ◽  
Author(s):  
Barry Hyman ◽  
Sanjeev Khanna ◽  
Yuyi Lin ◽  
Jim Borgford-Parnell
Keyword(s):  
Project Based Learning ◽  
Assessment Process ◽  
Design Management ◽  
Original Design ◽  
University Of Missouri ◽  
Design Projects ◽  
Management Students ◽  
The University ◽  
Capstone Design

This paper describes an NSF funded project in the Mechanical and Aerospace Engineering (MAE) Department at the University of Missouri. A primary goal of this project is to systematically increase project-based learning (PBL) experiences throughout the MAE curriculum. To accomplish this goal, recent capstone design projects that need further refinements serve as the basis for PBL activities throughout the MAE curriculum. A major tool for facilitating these refinement efforts is a new senior/graduate Design Management course in which each student in this course learns how to plan and manage design projects. These students then implement their learning by serving as project team managers in the courses in which the refinement activities are being conducted. This paper provides a detailed case study of five refinements to one capstone design that took place in four different MAE courses during the Spring 2011 semester. The paper describes a Fall 2009 capstone project that consisted of designing a portable wood chipper. The student design was very promising, leading to a chipper with significantly greater chipping capacity than commercially available chippers of the same size and weight. However, several faculty members reviewed the results and identified additional opportunities for refining the design. This paper describes activities during Spring 2011 when students in four different MAE courses developed refinements to the original design. The roles of the Design Management students in these activities are discussed. The paper also includes a discussion of the methods and findings of the formative assessment process, including interviews with, and surveys of, faculty and students.

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