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ACS International Conference on Computer systems and Applications

作者： Nawal Sael Abdelaziz Marzak Hicham Behja Laboratory of Information Technology and Modelization Faculty of Science Ben M'sik Laboratory of Command Control and Production Systems National High School of Art and Craft

ISBN: (纸本)9781479907915

This research illustrates the potential of Web Usage Mining on e-Learning domain. We use educational data mining techniques to analyze learners' behavior, to help in learning evaluation and to enhance the structure of a given course. We focus on the preprocessing task, which is considered as the most crucial phase in the whole process. Our objective is to develop a data preprocessing method applied to Moodle logs based on SCORM content structure. In earlier works [1] [2], we proposed a preprocessing tool to implement these new methods and present the first discovered knowledge. In this research, we define new static variables according to the SCORM content tree and we apply more statistics and visualization techniques. In addition, we present multidimensional graphics in order to understand users' accesses. These aggregated variables provide teachers and tutors with interesting knowledge about students' learning process according to different levels of content accessed.

关键词： Educational data mining Web Usage Mining Preprocessing Moodle SCORM Learning process

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Toward the validation of knowledge in corporate memory

Toward the validation of knowledge in corporate memory

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4th International Conference on Next Generation Networks and Services, NGNS 2012

作者： Chakhmoune, Rabab Behja, Hicham Benghabrit, Youssef Marzak, Abdelaziz Laboratory Command and Control of Production Systems ENSAM Meknes Morocco Laboratory of Information Technologies and Modeling Faculty of Science Ben M'sik Casablanca Morocco

ISBN: (纸本)9781479921683

Knowledge is one of the organization's most important values that influencing its competitiveness. One way to capture organization's knowledge and make it available to all their members is through the use of knowledge management systems. A critical process in the whole knowledge management life cycle is validation. A Knowledge Base (KB) incorporated into such systems has to be verified or (more generally) validated. There have been many approaches to develop specialised procedures and techniques, aimed at assuring the highest level of knowledge quality, so the paper deals with practical guidelines of Knowledge Validation (KV). This paper defines certain principles useful in the validation procedures referring to the structural assumption for KV. Finally it presents our approach to build a corporate memory in industrial study case comparing with other case studies. © 2012 IEEE.

关键词： Life cycle

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Building corporate memories in collaborative way using ontologies: Case study of a SSII

Building corporate memories in collaborative way using ontol...

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3rd International Conference on Next Generation Networks and Services, NGNS'2011

作者： Chakhmoune, Rabab Behja, Hicham Marzak, Abdelaziz Laboratory Command and Control of Production Systems ENSAM Meknes Morocco Laboratory of Information Technologies and Modeling Faculty of Science Ben m'Sik Morocco

ISBN: (纸本)9781467301398

The task of Knowledge Management (KM) is to capture explicit and tacit knowledge of an organization in order to facilitate the access, sharing, and reuse of that information. Knowledge capital is a strategic asset in the achievement of the objectives, a major element for the survival of the organization. In this article, we present the importance of having a collaborative environment for managing corporate memories. We'll first show the interest to use corporate memories to manage knowledge and/or documents. Secondly, we'll propose a suitable interaction model to represent and manage corporate memories in collaborative way. Finally, we present PCOGEME, a collaborative environment based on brainstorming and consensual decision making mechanism to build corporate memories using ontologies. © 2011 IEEE.

关键词： Ontology

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Building corporate memories in collaborative way using ontologies: Case study of a SSII

Building corporate memories in collaborative way using ontol...

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International Conference on Next Generation Networks and Services (NGNS)

作者： Rabab Chakhmoune Hicham Behja Abdelaziz Marzak Laboratory Command and Control of Production Systems ENSAM-Meknes Morocco Laboratory of Information Technologies and Modeling Faculty of Science Ben Msik Morocco

关键词： Ontologies Organizations Memory management Collaboration Knowledge management Buildings Context

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The Regional Deterrence Ship (RDS 2010) - A design for littoral warfare in the 2010 timeframe

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NAVAL ENGINEERS JOURNAL 1996年第1期108卷 61-72页

作者： Calvano, CN Riedel, JS Professor Charles N. Calvano Capt. USN (Ret.): of the Naval Postgraduate School is responsible for a program in Total Ship Systems Engineering. He is a graduate of the Naval Academy who served as a surface warfare officer. After completion of his graduate education at MIT he became an Engineering Duty Officer and served at Boston Naval Shipyard in several capacities. He was the Repair Facilities Advisor to the Vietnamese Navy the Project Officer for construction of nuclear powered guided missile cruisers (CGNs) at the Supervisor of Shipbuilding Newport News Virginia and served on the staff of the Commander Naval Surface Forces U.S. Atlantic Fleet and later at the Supervisor of Shipbuilding in Portsmouth Virginia in maintenance and overhaul management positions. He was Officer in Charge of the Annapolis Laboratory of the David Taylor Research Center and Commanding Officer of the Engineering Duty Officer School. He retired from active duty in October 1991 after serving in the Naval Sea Systems Command as the Director of the Ship Design Group and of the Advanced Concepts and Technology Group. Lt. Jeffrey S. Riedel USN:is an Engineering Duty Officer currently assigned to the Supervisor of Shipbuilding Bath Maine. He obtained his B.S. degree in Marine Engineering from Maine Maritime Academy in 1986 and his M.S. degree in Mechanical Engineering plus a Mechanical Engineer's degree from the Naval Postgraduate School in 1993. Lt. Riedel's naval career has included duty aboaqrd USS Wainwright (CG 28) as auxiliaries officer damage control assistant and main machinery officer. Currently he serves as the assistant production officer at SUPSHIP Bath in charge of DDG 51 class construction and delivery.

This paper describes the design of a Regional Deterrence Ship (RDS 2010) for the 2010 timeframe. The requirements for the design were for a ship to operate in littoral areas of the world with a mission of deterring regional conflicts and of hampering the efforts of the aggressor in such a conflict. In addition the ship's mission included the evacuation of friendly personnel as hostilities become likely. The problem countering the littoral threat during times of constrained budgets is addressed. Top level requirements for the design, generated in parallel with ''.... From the Sea'' [1], were used to set the design goals. The paper describes the manner in which littoral warfare changes the nature of the challenges faced by Navy surface combatants, including a ship such as the RDS 2010. A number of factors become more crucial design concerns than for blue water ships, including reduced reaction times, likelihood of attack from hidden land sites, shallow water mines and shallow water USW Certain other factors become less critical in littoral areas and this also has ship design impacts. While some present ship designs can perform some of the tasks needed in a littoral warfare/regional conflict environment, none represents a completely integrated design (hull, mechanical & electrical;combat systems;fiscal and manning constraints;reduced vulnerability;robust self-defense etc.) for a vessel stationed in waters that, without warning, can become hostile. After describing the mission requirements to which the RDS 2010 was designed, the paper discusses the controlling design philosophy and decisions and describes the process used to assess threats to the ship. The process of combat system selection, against the backdrop of expected threat scenarios, is described and the intended approach to integration of the combat system is discussed. In recognition that decreased reaction times and surprise attacks are likely to threaten a ship engaged in regional deterrence, discussions oi

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LIGHTWEIGHT BROAD-BAND HF COMMUNICATIONS ANTENNA (LWCA)

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NAVAL ENGINEERS JOURNAL 1985年第4期97卷 279-286页

作者： BIONDI, RJ PRIDE, RW MURRAY, HD WHEELER, PK Roy J. Biondi:received his B.S.E.E. degree from the University of Illinois and has since taken additional graduate studies at the George Washington University. Currently he is head of the Communication Systems Application Branch code PDE 110–14 within the NAVELEXSYSCOM. Prior to his present appointment he served in the Combat Systems Division Naval Sea Systems Command and served as radar branch head in the former Naval Ship Engineering Center (NAVSEC). He was responsible for development and production of shipboard radars such as the AN/SPS-48 AN/SPS-49 AN/SPS-52 and AN/SPS-55. His primary Navy radar and combat system experience was attained during his earlier career in the Navy's Bureau of Ships where he was the AN/SPS-48 radar project engineer. In addition to ASNE which he joined in 1977 he is a member of IEEE and ASE and has had several technical papers published on radar radar antennas radar processing and transmission lines. Mr. Biondi has a total of 25 years naval experience in radar combat systems and communications. Richard W. Pride:received his B.S.E.E. from the University of Maine in 1959. Currently he is head of the Combatant Ship Section code PDE 110–143 in the Communications Systems Application Branch within the NAVELEXSYSCOM. Prior to joining the Naval Electronic Systems Command in 1974 he was the head of the Communication Antenna Design Section of the former Naval Ship Engineering Center. Harold D. Murray:received his B.S.E.E. from Vanderbilt University. Currently he is an EXCOMM program manager code PDE 110–1433 in the Combatant Ship Section of NAVELEXSYSCOM. As an EXCOMM program manager Mr. Murray is responsible for the external communications system design for the CG-47 (Aegis) class cruisers. Mr. Murray's previous government service includes 14 years at the Naval Research Laboratory (NRL) and 5 years at Naval Air Systems Command. Major areas of responsibility included shipboard RF distribution systems and aircraft intercommunication systems and control. Paul K. Wheeler:is pre

External communications is a critical element in the U.S. Navy design and utilization of a ship's combat system. The communications antenna system is a key factor in attainment of reliable circuit performance and reduction of electromagnetic interference (EMI). To maintain pace with improved ship manufacturing techniques and construction materials, along with design efforts to reduce topside generated EMI/RFI effects, an improved antenna design must also evolve. With the ever increasing complexity in the integration of the topside environment, the RF aspects of the antenna designs must be augmented by detailed analysis of the operating environment and the mechanical design if the goals of reliability and quality performance are to be achieved. The Naval Electronic systems command has developed a new “Broadband HF Communications Antenna.” This paper traces the design evolution and describes the processes in determining current design deficiencies, the design objectives to correct these deficiencies and the results obtained.

关键词： ANTENNAS

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MACHINERY ARRANGEMENT DESIGN - A PERSPECTIVE

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NAVAL ENGINEERS JOURNAL 1981年第3期93卷 133-141页

作者： RESNER, ME KLOMPARENS, SH LYNCH, JP Mr. Michael E. Resner:received an Engineering Degree from Texas A&M University in 1966 and has done graduate work in management at American University. He is Director Machinery Arrangements/Control Systems and Industrial Facilities Division (SEA 525) at the Naval Sea Systems Command. His previous positions have included Program Manager Solar Total Energy Program at the Department of Energy and Branch Chief Machinery Control Systems Branch at the Naval Ship Engineering Center. Mr. Stephen H. Klomparens:is a Naval Architect at Designers & Planners Inc. and is engaged in development of computer aids for ship design. He received his B.S.E. degree in Naval Architecture and Marine Engineering from the University of Michigan in 1973 and his M.S. degree in Computer Science from the Johns Hopkins University. Mr. Kolmparens began his professional career at Hydronautics Inc. in 1974 where he was involved in the use of marine laboratory facilities for test and development of conventional and advanced marine craft. Since 1977 he has been involved with naval and commercial ship design and with development of computer-aided ship design tools. Mr. John P. Lynch:is a Principal Marine Engineer with Hydronautics Inc. He was previously employed in the auxiliary machinery and computer-aided design divisions of the David W. Taylor Naval Ship R&D Center the machinery design division of the New York Naval Shipyard and the machinery arrangement code of the Bureau of Ships. His active naval service was as a ship superintendent in the production department of the Long Beach Naval Shipyard. Mr. Lynch received his B. S. degree in Marine Engineering from the New York State Maritime College and his M.S. degree in Mechanical Engineering from Columbia University. He is a licensed Professional Engineer in the State of New York and a member of ASNE.

The machinery arrangement design process has remained relatively unchanged over the years. Recently, external demands have been placed on both the product and the producers that call for changes to this process. This paper cites these external demands and traces the evolution of the process changes from the rule-of-thumb machinery box sizing routines up to the current automated procedures. The machinery arrangement design practice is presented, and existing analytic and graphics aids are discussed. The user requirements for improved design aids are presented, with implementation guidelines and hardware/software alternatives.

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