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1 – 10 of 416Herbert Sherman, Barry Armandi and Adva Dinur
Scandia, Inc., is a commercial vessel management company located in the New York Metropolitan area and is part of a family of firms including Scandia Technical; International…
Abstract
Scandia, Inc., is a commercial vessel management company located in the New York Metropolitan area and is part of a family of firms including Scandia Technical; International Tankers, Ltd.; Global Tankers, Ltd.; Sun Maritime S.A.;Adger Tankers AS; Leeward Tankers, Inc.; Manhattan Tankers, Ltd.; and Liuʼs Tankers, S.A. The companyʼs current market niche is the commercial management of chemical tankers serving the transatlantic market with a focus on the east and gulf coast of the United States and Northern Europe. This three-part case describes the commercial shipping industry as well as several mishaps that the company and its President, Chris Haas, have had to deal with including withdrawal of financial support by creditors, intercorporate firm conflict, and employee retention. Part A, which was published in the Fall 2010 issue, presented an overview of the commercial vessel industry and set the stage for Parts B and C where the firm℉s operation is discussed.
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Peter Christian (Chris) Murphy had worked his way up the “food chain” at AT&T for 19 years, culminating in his position as Sales Center Vice President for South Florida. When he…
Abstract
Peter Christian (Chris) Murphy had worked his way up the “food chain” at AT&T for 19 years, culminating in his position as Sales Center Vice President for South Florida. When he and a coworker realized there was an opportunity in the marketplace for a small, nimble company to take advantage of emerging communications technology that a stodgy, lumbering corporation would have trouble integrating into its service package, Chris decided to jump into an entrepreneurial opportunity.
Chris Brown, Robert White and Anthony Kelly
Change agents are individuals who can successfully transform aspects of how organisations operate. In education, teachers as change agents are increasingly seen as vital to the…
Abstract
Change agents are individuals who can successfully transform aspects of how organisations operate. In education, teachers as change agents are increasingly seen as vital to the successful operation of schools and self-improving school systems. To date, however, there has been no systematic investigation of the nature and role of teacher change agents. To address this knowledge gap, we undertook a systematic review into five key areas regarding teachers as change agents. After reviewing 70 outputs we found that current literature predominantly positions teacher change agents as the deliverers of top-down change, with the possibility of bottom-up educational reform currently neglected.
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Barry Armandi, Adva Dinur and Herbert Sherman
Scandia, Inc., is a commercial vessel management company located in the New York Metropolitan area and is part of a family of firms including Scandia Technical; International…
Abstract
Scandia, Inc., is a commercial vessel management company located in the New York Metropolitan area and is part of a family of firms including Scandia Technical; International Tankers, Ltd.; Global Tankers, Ltd.; Sun Maritime S.A.;Adger Tankers AS; Leeward Tankers, Inc.; Manhattan Tankers, Ltd.; and Liuʼs Tankers, S.A. The companyʼs current market niche is the commercial management of chemical tankers serving the transatlantic market with a focus on the east and gulf coast of the United States and Northern Europe. This three-part case describes the commercial shipping industry as well as several mishaps that the company and its President, Chris Haas, have had to deal with including withdrawal of financial support by creditors, intercorporate firm conflict, and employee retention. Part A presents an overview of the commercial vessel industry and sets the stage for Parts B and C (to be published in the Spring 2011 issue) where the firmʼs operation is discussed.
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Joseph Henry Robinson, Ian Robert Thomas Ashton, Eric Jones, Peter Fox and Chris Sutcliffe
This paper aims to present an investigation into the variation of scan vector hatch rotation strategies in selective laser melting (SLM), focussing on how it effects density…
Abstract
Purpose
This paper aims to present an investigation into the variation of scan vector hatch rotation strategies in selective laser melting (SLM), focussing on how it effects density, surface roughness, tensile strength and residual stress.
Design/methodology/approach
First the optimum angle of hatch vector rotation is proposed by analysing the effect of different increment angles on distribution of scan vectors. Sectioning methods are then used to determine the effect that the chosen strategies have on the density of the parts. The top surface roughness was analysed using optical metrology, and the tensile properties were determined using uni-axial tensile testing. Finally, a novel multi-support deflection geometry was used to quantify the effects of rotation angles on residual stress.
Findings
The results of this research showed that the hatch rotation angle had little effect on the density, top surface roughness and strength of the parts. The greatest residual stress deflection was measured parallel to unidirectional scan vectors. The use of hatch rotations other than alternating 90° showed little benefit in lowering the magnitude of residual stresses. However, the use of rotation angles with a good suitability measure distributes stresses in all directions more evenly for certain part geometries.
Research limitations/implications
All samples produced in this work were made from commercially pure titanium, therefore care must be taken when applying these results to other materials.
Originality/value
This paper serves to increase the understanding of SLM scanning strategies and their effect on the properties of the material.
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