Christian Mancas

Experience

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  Lecom srl

  Mar 1991 - Jul 1993

  Computer division manager

  Relational Data Bases; Design, Assembly, Configuration & Support of LANs, PCs, and Peripherals.

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  DATASIS Consult srl

  Feb 1993 - Sept 2002

  Co-owner and software division manager

  Relational Data Bases; Design, Assembly, Configuration & Support of LANs, PCs, and Peripherals. Internet. IT consulting and post graduation courses. Intel e-Business Partner; Microsoft, Symantec, Novell, and AutoDesk authorized dealer. Design and implementation of middleware between radio portable terminals and SQL Server and Access dbs for the French ActSyst company, audio-video surveillance firmware and software for the French CODEM Technologies company, as well as consulting, management, and accounting applications for Romanian, Irish, Greek, Lebanese etc. companies. Architecture, design, and implementation of the 6th version of MatBase, using VBA, XML, and MS Access JetSQL. Show less

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  Vlamir Impex srl

  Aug 1993 - Apr 1995

  Computer division manager

  Relational Data Bases; Design, Assembly, Configuration & Support of LANs, PCs, and Peripherals.

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  Ovidius State University Constanta, Math. & Comp. Sci. Dept.

  Oct 1999 - Oct 2019

  Ph. D. Associate Professor

   Conceptual Data and Knowledge Modeling and Querying (advanced E-R, Relational, Functional, Mathematical, and Logical Data Modeling; inter-models translation algorithms, hierarchies, equivalences; concurrency control, transaction, security, query optimization, meta-catalogs, API; SQL, QBE, DATALOG, C#; XML, Access, ORACLE, DB/2, SQL Server, Tandem NonStop), MSc. students, 2004-present DBs (fundamentals of E-R, Rel., and Math. Modeling; SQL, QBE, VBA; Access, DB/2, SQL Server), Romanian and English, 1999-present DBMS (transactions, concurrency control, back-up and recovery, security, constraint implementation, query optimization, meta-catalogues, API, distributed dbs.; SQL, QBE, XML, C#, VBA; DB/2, ORACLE, Tandem NonStop, SQL Server, Access), 2007-present Algorithms & Data Structures (Object-Oriented, Event-Driven, Top-Down, Structured Design; Lists, Queues, Stacks, Trees, Graphs; Searching, Sorting; VS C++), Romanian and English, 1999-2002 Show less

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  DATASIS ProSoft srl

  Sept 2002 - Mar 2024

  Owner and C.E.O.

  Design & dev. of extensions to VisualStock appl.of IER, France, Bollore Group (Opalix, C++, Delphi, SQL Server). Audio-video surveillance firmware and software for the French Digital Mobile Systems and U.S. TAW Security companies. Architecture, design & dev. of the IER Qualiboo, VisualChain (Inventaire, Livraison, Placier, Vente, Pocket, etc.), Guilbert and Filminger Visual Stock db and Windows services; client-server, PC & PocketPC, C#, ASP.NET, XML, MS SQL Server. Same things for the UK Microlise, plus SQL Reporting, mainly for their Fleet and Distribution Portfolio. Architecture, design & dev. of MatBase 7th vers., C#, XML, SQL Server; of a web portal and crawler for Swiss luxury products, Apache, Eclipse Java, PHP, XML, MySQL; of DATASIS ProSoft, Roxy inn, and other web sites, ASP.NET, C#, XML, SQL Server; etc. Microsoft and Microsoft Embedded Partner. Show less

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  Politehnica University, Bucharest, Romania, Comp. & Telecom. in English Dept.

  Oct 2002 - Oct 2021

  Ph. D. Associate Professor

   Data Management Systems (transactions, concurrency control, back-up and recovery, security, constraint implementation, query optimization, meta-catalogues, API, distributed dbs.; SQL, QBE, XML, C#, VBA; DB/2, ORACLE, Tandem NonStop, SQL Server, Access, CA-OpenIngres), in English, 2007-present Operating Systems (Processes and Synchronization, CPU Scheduling, Deadlocks, Memory and Virtual Memory Management, File System Interface and Implementation, I/O Systems, applications to Windows 2003/XP and Red Hat Linux, in English, 2002-present Advanced Operating Systems (Mass Storage Structure, Distributed Systems Structures, File Systems, and Coordination, Protection and Security, applications to Windows 2003/XP and Red Hat Linux, in English, 2002-2007 Show less

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  IASTED

  Feb 2003 - Nov 2011

  Program Committee Member

  Intl. Conferences Program (mostly on Software Engineering and Applications, but also on Information and Knowledge Sharing) design, reviews of submitted papers

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  Journal of Information Technology and Software Engineering, OMICS International, Los Angeles, CA

  Jan 2012 - now

  Editor In Chief
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  Journal of Information Technology & Software Engineering

  Mar 2012 - now

  Editor-in-Chief

  https://www.omicsgroup.org/journals/editorialboard-information-technology-software-engineering-open-access.php- submitted papers review- October 2012 editorial ("Is Math Adequately Taught for Tomorrow's Software Engineers?") author- December 2012 special Reverse Engineering issue handling editor and editorial ("Should Reverse Engineering Remain a Computer Science Cinderella?") author

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  Asentinel

  Aug 2012 - Oct 2021

  Oracle and Postgres DB, DW, and BI data architect

  - designed and implemented BI products (reports, budgets, forecasts, etc.) using Board and SAP BO - designed and implemented DB, DW, and PL/SQL migration from Oracle to Postgres solution- designed and implemented the data warehouse (using materialized views and logs with automatic incremental fast refresh in the cloud) and several Jasper reports- analyzed current Asentinel product db scheme and PL/SQL code- proposed optimization enhancements- wrote a best practice guide for data analysis, conceptual data modeling, db architecture, design, and implementation in Oracle 11g- rewrote PL/SQL legacy code, added views and indexes for obtaining faster application response time Show less

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  TotalSoft

  Oct 2018 - Sept 2019

  Software Infrastructure Manager

  - discovery and dropping of unneeded indexes- discovery and adding of missing covering indexes- discovery and reorganizing / rebuilding of fragmented indexes- optimizations of SQL Server triggers- analysis and prevention of all 3 types of SQL Server deadlocks- optimizations of CharismaERP stored procedures and functions