Tool allocation and machining conditions optimization for CNC machines

Cataloged from PDF version of article.In the literature, there exist many variations of machining economics problem in terms of modelling approaches and solution methodologies. However most of the existing studies focus on the single machining operation which is seldom in practice. On the other hand, tool management approaches at the system level fail to relate the tooling issues to the machining conditions, and ignore the tool availability and tool wear restrictions. A new solution methodology is developed to determine the optimum machining conditions and tool allocation simultaneously to minimize the production cost of a multiple operation case where there can be alternative tools for each operation. As a result, we can both improve the solution by exploiting the interaction between these two decisions, and also prevent any infeasibility that might occur for the tool allocation problem due to tool contention among the operations for a limited number of tool types by considering the tool availability and tool life limitations

collected from South and South-eastern regions of Turkey

A total of 45 lizards (Acanthodactylus harranensis [n = 15], Acanthodacthylus schreiberi [n = 9] and Mesalina brevirostris [n = 21]) were collected from South and Southeastern Regions of Turkey and examined for helminth fauna. Acanthodactylus harranensis harbored 1 species of Nematoda (Skrjabinodon sp.), 1 species of Cestoda (Oochoristica tuberculata) and 1 species of Acanthocephala (Centrorhynchus sp. [cystacanth]). Acanthodactylus schreiberi harbored unidentified cysticercoids. Mesalina brevirostris harbored 1 species of Nematoda (Spauligodon saxicolae). All lizards represents new host records for the helminths reported in this study

Tool magazine arrangement and operation sequencing on CNC machines

Cataloged from PDF version of article.two-phase approach is developed to solve the tool magazine arrangement and operations sequencing problems. The overall aim is to minimize the total manufacturing cost by utilizing the benefits of tool sharing concept and loading duplicate tools due to a possible decrease in tooling and tool operating costs while maintaining the feasibility in terms of precedence, tool magazine capacity, tool life covering and tool availability constraints due to tool contention among the operations for a limited number of tool types, because the absence of such crucial constraints may lead to infeasible results. Furthermore, the proposed approach can provide an effective decision making tool for the short term operational decisions of FMS. Copyright © 1996 Elsevier Science Lt

Do Independent Directors Curb Financial Fraud? The Evidence and Proposals for Further Reform

In this article, we argue that the U.S. corporate governance rules put too much faith in the independent board members and insufficient emphasis on the shareholders themselves to control and monitor the top management. Given the agency problem between the board of directors and the shareholders, outside directors can be captured by management, thereby leading to inadequate checks on management. The evidence presented in this paper shows that outside board members do not exercise sufficient controls on the management even when the management has gone awry. To solve this agency problem, we propose increasing the power of the principals: make shareholder resolutions binding on management, require a one share, one vote rule to increase the voting rights of shareholders, as well as give the shareholders the ability to directly nominate and/or actively vote against board members.https://deepblue.lib.umich.edu/bitstream/2027.42/139595/1/1352_Schipani_Nov17.pdfhttps://deepblue.lib.umich.edu/bitstream/2027.42/139595/4/1352_Schipani_Aug18.pdfhttps://deepblue.lib.umich.edu/bitstream/2027.42/139595/6/1352_SchipaniOct2018.pdfDescription of 1352_Schipani_Aug18.pdf : Aug 2018 Pre-publication draftDescription of 1352_SchipaniOct2018.pdf : October 2018 revisio

Eliminating Conflicts of Interests in Banks: The Significance of the Volcker Rule

Public policy has been focused on controlling the conflicts of interests in banks for the last eighty-five years with limited success. Banks have a unique place in the economy as intermediaries between investors and companies, allowing them to obtain significant private, proprietary information. Public policy is focused on trying to ensure that banks do not misuse this information for their own benefit to the detriment of their clients. This is a tough task

The Elusive Monitoring Function of Independent Directors

Federal law mandates that audit and compensation committees of public companies be comprised entirely of independent directors. The assumption underlying these legal requirements is that independent directors are more likely to act as monitors of the company’s top management. In this paper, we test this assumption. We conduct our tests by examining the level, direction, and profitability of independent directors’ insider trades and compare these to the trades of other members of top management in firms defending class-action lawsuits. Our evidence indicates that there are no differences between the trading activity of independent directors and other insiders during the class period. Our findings cast doubt on the effectiveness of independent directors’ monitoring role.https://deepblue.lib.umich.edu/bitstream/2027.42/145437/1/1384_Schipani.pd