Multiple Fault Detection and Isolation Using the Haar Transform, Part 2: Application to the Stamping Process

1999 ◽  
Vol 121 (2) ◽  
pp. 295-299 ◽  
Author(s):  
C. K. H. Koh ◽  
J. Shi ◽  
W. J. Williams ◽  
J. Ni
Keyword(s):  
Sheet Metal ◽  
Fault Detection And Isolation ◽  
Strain Gages ◽  
Process Variables ◽  
Multiple Fault ◽  
The Press ◽  
Exclusive Sets ◽  
Detection Schemes ◽  
Current Detection

The sheet metal drawing operation is a complex manufacturing process involving more than forty process variables. The intricate interaction among these variables affect the forming tonnage which is measured by strain gages mounted on the press. A fault is said to occur when any of these process variables deviate beyond their specified limits. Current detection schemes based on thresholding do not fully exploit the information in the tonnage signals for the detection and isolation of multiple fault condition. It is thus an excellent case study for demonstrating the implementation of the detection methodology presented in Part 1. By partitioning the tonnage signature into disjoint segments, mutually exclusive sets of Haar coefficients can be used to isolate faults in each stage of the process.

Multiple Fault Detection and Isolation Using the Haar Transform, Part 1: Theory

1999 ◽  
Vol 121 (2) ◽  
pp. 290-294 ◽  
Author(s):  
C. K. H. Koh ◽  
J. Shi ◽  
W. J. Williams ◽  
J. Ni
Keyword(s):  
Low Cost ◽  
A Priori ◽  
Fault Detection And Isolation ◽  
Ratio Test ◽  
Process Variables ◽  
Detection Rates ◽  
Haar Transform ◽  
Priori Information ◽  
Exclusive Sets ◽  
Process Measurements

Most manufacturing processes involve several process variables which interact with one another to produce a resultant action on the part. A fault is said to occur when any of these process variables deviate beyond their specified limits. An alarm is triggered when this happens. Low cost and less sophisticated detection schemes based on threshold bounds on the original measurements (without feature extraction) often suffer from high false alarm and missed detection rates when the process measurements are not properly conditioned. They are unable to detect frequency or phase shifted fault signals whose amplitudes remain within specifications. They also provide little or no information about the multiplicity (number of faults in the same process cycle) or location (the portion of the cycle where the fault was detected) of the fault condition. A method of overcoming these limitations is proposed in this paper. The Haar transform is used to generate sets of detection signals from the original measurements of process monitoring signals. By partitioning these signals into disjoint segments, mutually exclusive sets of Haar coefficients can be used to locate faults at different phases of the process. The lack of a priori information on fault condition is overcomed by using the Neyman-Pearson criteria for the uniformly most powerful form (UMP) of the likelihood ratio test (LRT).

Social science and the press: A case study and its implications.

1981 ◽  
Vol 36 (5) ◽  
pp. 480-487 ◽  
Author(s):  
Russell H. Weigel ◽  
Jeffrey J. Pappas
Keyword(s):  
Social Science ◽  
The Press

Press Propaganda and Subaltern Agents of Pan-Islamic Networks in the Muslim Mediterranean World prior to World War I

2018 ◽  
Author(s):  
Odile Moreau
Keyword(s):  
Middle East ◽  
World War I ◽  
North Africa ◽  
World War ◽  
Subaltern Studies ◽  
Resistance Movements ◽  
The Press ◽  
Mediterranean World ◽  
History Of

This chapter explores movement and circulation across the Mediterranean and seeks to contribute to a history of proto-nationalism in the Maghrib and the Middle East at a particular moment prior to World War I. The discussion is particularly concerned with the interface of two Mediterranean spaces: the Middle East (Egypt, Ottoman Empire) and North Africa (Morocco), where the latter is viewed as a case study where resistance movements sought external allies as a way of compensating for their internal weakness. Applying methods developed by Subaltern Studies, and linking macro-historical approaches, namely of a translocal movement in the Muslim Mediterranean, it explores how the Egypt-based society, al-Ittihad al-Maghribi, through its agent, Aref Taher, used the press as an instrument for political propaganda, promoting its Pan-Islamic programme and its goal of uniting North Africa.

The "Right to Die": A Case Study in American Lawmaking*

1996 ◽  
Vol 3 (1) ◽  
pp. 49-74
Author(s):  
Alan Meisel
Keyword(s):  
Legal System ◽  
Right To Die ◽  
Judicial Process ◽  
Clinical Issue ◽  
The Press ◽  
American Law ◽  
American Legal System ◽  
The Right ◽  
Made In

AbstractIn the 20 years that have passed since the Karen Quinlan case exposed a simmering clinical issue to the light of day — more precisely, to the press and to judicial process — a consensus has developed in American law about how end-of-life decisionmaking should occur. To be sure, there are dissenting voices from this consensus, but they are often (though not always) about minor issues. By illustrating how this consensus has evolved, this paper explores how law is made in the American legal system and the roles that different legal and extra-legal institutions play in lawmaking.

scholarly journals The Chernobyl disaster: A case study on the information policy of the Kádár regime

2019 ◽  
Vol 12 (1) ◽  
pp. 78-91
Author(s):  
Dalma Kékesdi-Boldog
Keyword(s):  
Information Policy ◽  
Chernobyl Disaster ◽  
Propaganda Model ◽  
Nuclear Disaster ◽  
The Press ◽  
Opinion Polls

While the Hungarian Socialist Workers’ Party was on the rhetorical level committed to the Soviet agitation and propaganda model, in practice it increasingly deviated from it during the 1980s. As the press reflected upon the events of the day, propaganda could manifestly be at odds with reality, creating a reality gap, that is, one between what people were told to see and what they actually saw. This paper offers a case study on the communication of the Chernobyl nuclear disaster in Hungary and looks into how it was reflected in party communiques, the party newspaper, and opinion polls. It asks the question of whether ‘accuracy’ or ‘partisanship’ prevailed in the official communication of the disaster.

scholarly journals “Veillant Panoptic Assemblage”: Mutual Watching and Resistance to Mass Surveillance after Snowden

2015 ◽  
Vol 3 (3) ◽  
pp. 12-25 ◽  
Author(s):  
Vian Bakir
Keyword(s):  
Journalism Studies ◽  
Holding Power ◽  
Digital Surveillance ◽  
The Press ◽  
Intelligence Agencies ◽  
State Surveillance ◽  
Intelligence Studies ◽  
Public Oversight

The Snowden leaks indicate the extent, nature, and means of contemporary mass digital surveillance of citizens by their intelligence agencies and the role of public oversight mechanisms in holding intelligence agencies to account. As such, they form a rich case study on the interactions of “veillance” (mutual watching) involving citizens, journalists, intelligence agencies and corporations. While Surveillance Studies, Intelligence Studies and Journalism Studies have little to say on surveillance of citizens’ data by intelligence agencies (and complicit surveillant corporations), they offer insights into the role of citizens and the press in holding power, and specifically the political-intelligence elite, to account. Attention to such public oversight mechanisms facilitates critical interrogation of issues of surveillant power, resistance and intelligence accountability. It directs attention to the <em>veillant panoptic assemblage</em> (an arrangement of profoundly unequal mutual watching, where citizens’ watching of self and others is, through corporate channels of data flow, fed back into state surveillance of citizens). Finally, it enables evaluation of post-Snowden steps taken towards achieving an <em>equiveillant panoptic assemblage</em> (where, alongside state and corporate surveillance of citizens, the intelligence-power elite, to ensure its accountability, faces robust scrutiny and action from wider civil society).

scholarly journals La representación de la Ley antitabaco en la ficción televisiva española. Estudio comparativo con la prensa | The representation of the anti-smoking law in the Spanish television fiction. Comparative study with the press

2013 ◽  
Author(s):  
Belén Puebla Martínez
Keyword(s):  
Narrative Analysis ◽  
Current Issue ◽  
Visual Narrative ◽  
Current Period ◽  
The Press ◽  
The Media ◽  
Object Of Study ◽  
Medios De Comunicacion ◽  
A Current

ResumenPresentamos en esta investigación el análisis de un tema de actualidad a través de la realidad representada en la ficción y la realidad mediatizada en la información. Debido a la naturaleza del objeto de estudio – las telecomedias españolas –realizamos un estudio de caso de tal modo que podamos comparar el tratamiento que el tema propuesto en los medios de comunicación, concretamente en la prensa, frente a la manera de exponerlo en las tramas de los capítulos de las series. Para analizarlo hemos considerado conveniente realizar un análisis narrativo audiovisual cualitativo a un tema estrechamente relacionado con la actualidad del periodo que se plantea en este estudio y que está presente en las series analizadas: 7vidas y aquí no hay quien viva. El tema elegido es la implantación de la Ley Antitabaco 28/2005 de 26 de diciembre y que fue recogida por ambas telecomedias en el primer capítulo que emitieron en el mismo mes de la promulgación de la ley. Abstract We present in this study the analysis of a current issue through the reality represented in fiction and reality mediated in information. Due to the nature of the object of study - the Spanish sitcom- conducted a case study so that we can compare the treatment that the proposed topic in the media, particularly in the press, in front of the way to put in chapters of the series. To analyze this we considered advisable to conduct a qualitative visual narrative analysis a subject closely related to current period arising in this study and is present in the series analyzed: 7 vidas and Aquí no hay quien viva. The theme is the implementation of the anti-smoking law 28/2005 of December 26 and was picked up by two sitcoms in the first chapter that issued in the same month of the enactment of the law. Palabras claveRepresentación, series de televisión, prensa, análisis cualitativo, 7 vidas, Aquí no hay quien viva.KeysworksRepresentation, spanish television fiction, press, qualitative analysis, 7 vidas, Aquí no hay quien viva.

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