Search results for "Manufacturing engineering"

The Janus Face of Political Experience

2018

Arendt’s concept of experience can contribute in important ways to the contemporary debates in political and feminist theory. However, while the notion is ubiquitous in Arendt’s thinking we lack an understanding of experience as a concept, as opposed to the impact of Arendt’s personal experiences on her thought. Drawing from her notes for “Political Experiences in the Twentieth Century,” the article seeks to enrich our understanding of the Janus-faced character of political experience. It emphasizes the importance of vicariousness, and argues that experience should be understood as a process of suffering, enduring, and re-experiencing events beyond our conscious control. The article further…

Testing the shape-similarity hypothesis between particle-size distribution and water retention for Sicilian soils

2012

Application of the Arya and Paris (AP) model to estimate the soil water retention curve requires a detailed description of the particlesize distribution (PSD) but limited experimental PSD data are generally determined by the conventional sieve-hydrometer (SH) method. Detailed PSDs can be obtained by fitting a continuous model to SH data or performing measurements by the laser diffraction (LD) method. The AP model was applied to 40 Sicilian soils for which the PSD was measured by both the SH and LD methods. The scale factor was set equal to 1.38 (procedure AP1) or estimated by a logistical model with parameters gathered from literature (procedure AP2). For both SH and LD data, procedure AP2 …

TESTING THE GRAIN-SIZE DISTRIBUTION DETERMINED BY LASER DIFFRACTOMETRY FOR SICILIAN SOILS

2012

In this paper the soil grain-size distribution determined by Laser Diffraction method (LDM) is tested using the Sieve-Hydrometer method (SHM) applied for 747 soil samples representing a different texture classification, sampled in Sicily. 005_Di_Stefano(599)_39 28-12-2011 15:01 Pagina 45 The analysis showed that the sand content measured by SHM can be assumed equal to the one determined by LDM. An underestimation of the clay fraction measured by LDM was obtained with respect to the SHM and a set of equations useful to refer laser diffraction measurements to SHM was calibrated using the measurements carried out for 635 soil samples. Finally, the proposed equations were tested using independe…

Sequent depth ratio of B-jumps on smooth and rough beds

2013

A hydraulic B-jump has the toe section located on a positively sloping upstream channel and the roller end on a downstream horizontal channel. This paper analyses the B-jump on a rough bed, such as at the transition from a block ramp to the stilling basin. Laboratory measurements of the sequent depth were carried out using three different channel slopes for the rough bed and a single slope for the smooth bed. A solution useful for estimating the sequent depth ratio in a rectangular channel for different relative roughness and bed slope is proposed and positively tested by the present measurements. This solution can also be used to estimate the sequent depth ratio of classical hydraulic jump…

Bibliographic/Archival Material Relating to the History of Archaeology

1994

The measurement invariance of Job Diagnostic Survey (JDS) across three university student groups

2016

Purpose: The main purpose of this study is to apply a multigroup confirmatory analysis to examine the measurement invariance (MI) of the adapted version of the Job Diagnosis Survey (JDS) as a measurement tool that analyses the relationship between the features of teaching methodologies with university students’ motivation and satisfaction across data collected on different degrees and academic years. Design/methodology/approach: Confirmatory factor analysis was carried out using a multigroup structural equation model, using the program EQS 6.1 to test the invariance of the adapted version of JDS in a sample constituted by 535 student of a Spanish public university. The assessment of invaria…

Heat rectification in He II counterflow in radial geometries

2018

Abstract We consider heat rectification in radial flows of turbulent helium II, where heat flux is not described by Fourier's law, but by a more general law. This is different from previous analyses of heat rectification, based on such law. In our simplified analysis we show that the coupling between heat flux and the gradient of vortex line density plays a decisive role in such rectification. Such rectification will be low at low and high values of the heat rate, but it may exhibit a very high value at an intermediate value of the heat rate. In particular, for a given range of values for the incoming heat ow, the outgoing heat flow corresponding to the exchange of internal and external tem…

A systematic literature review of the transition to the circular economy in business organizations: Obstacles, catalysts and ambivalences

2021

There is a need for a transition from unsustainable linear business models to a more sustainable circular approach, called the circular economy. To promote this need, a deeper understanding of which issues hinder organizations’ transition to the circular economy and which ones catalyse it is needed. A systematic literature review was performed on the business implementation of the circular economy and 69 articles covering the topic were found. The review identifies different types of catalyst, obstacles and ambivalent factors influencing circular economy implementation in business. This study contributes to research on circular economy implementation at business organizations by providing u…

3D Printing : Challenging Existing Business Models

2016

Technologies labelled as “disruptive” challenge conventional business procedures. The development of 3D printing technology and additive manufacturing (AM) is expected to transform product design and manufacturing. 3D printing technology makes it possible to produce complex and unique physical products from digitally designed CAD models. It is estimated that the effects of 3D printing on business will be diverse and far‐reaching. Hence, it is vital for business owners to observe how 3D printing may impact on business models and business networks, considering also the effects on stakeholders’ value propositions and on value creation. This paper reports on the potential impact of 3D printing …

Los Mapas contables de gestión de las empresas cotizadas chilenas : análisis cualitativo

2017

espanolEl articulo analiza las clases de gestion realizadas por las empresas cotizadas chilenas localizadas en los espacios administrativos de Chile. La orientacion del analisis realizado considera que el factor cultural de la region donde estan localizadas las empresas chilenas condiciona la clase de gestion desarrollada por dichas empresas. El desarrollo de esta hipotesis se realiza aplicando la metodologia contable de los graficos radiales. Las tensiones existentes entre los periodos medios de maduracion representados en un grafico radial asumen la existencia de un factor cultural en las transacciones realizadas por las empresas en una region y supone que la toma de decision en un area t…