Detailed Project List - Rainer Schwarze

Further development of mobile iOS App "Cornelsen Lernen" in crossfunctional team in an agile environment. Implementation of backend communication with coordination across teams. Integration of complex web components in iOS App with bidirectional data flow. Implementation of deployment environments and targets, integration in CI/CD.

Extend existing JavaScript client logging module with remote message transfer abilities. Implement message queue with batch send support and exponential backoff for error recovery.

Implement maximum length constraint in CKEditor backed custom control.

Implement customer requirements for chart control and richtext control. Optimize chart rendering. Investigate errors in CKEditor library and develop bug fixes.

Investigate JavaScript network chart libraries for use in custom framework. Analyze and compare feature sets for decision process. Implement a set of prototypes showcasing network charts using different charting libraries. Performance analysis on major browsers on desktop and mobile platforms. Derive feature and requirements matrix for decision process.

Implement heatmap and treemap chart in chart control.

Investigate and correct bugs in syn (event synthesizing library for automated UI tests), which surfaced with updated richtext control.

Upgrade Highcharts library from version 5 to version 6 in chart control in custom application framework. Adjust build scripts for new modularized Highcharts build system.

Optimize CKEditor backed richtext editor control for variety of browsers and reduced screen size on mobile platforms. Determine cause of memory leaks in CKEditor library and implement proper release logic to reduce memory leaks.

Investigate JavaScript richtext editing libraries for use in custom framework. Analyze and compare feature sets for decision process. Prepare CKEditor JavaScript library for use in Asynchronous Module Definition (AMD) context. Implement richtext editor control with CKEditor as basis in custom framework.

Create a virtual server infrastructure to host various servers and establish seed, backup and restore procedures. The infrastructure is designed to have minimal footprint in resources and dependencies and can operate while being disconnected from the internet. Create a mail server using postfix, dovecot and fetchmail for all inhouse mail traffic and storage. Create a storage server for automatic backup and restore of the intranet servers. Create a VCS server for svn, hg and git hosting. Create a VPN server for remote network access. Create a low resource mirror for the Alpine Linux project to ensure productivity in case of internet outages.

Investigate JavaScript chart libraries for use in custom framework. Analyze and compare feature sets for decision process. Prepare Highcharts JavaScript library for use in Asynchronous Module Definition (AMD) context. Implement custom chart control with Highcharts as basis in custom framework.

Investigate internationalization and localization of iOS iPad app. Implement scripts to inspect and extract localization information from layout files (xib). Reduce layout files in project and harmonize localization texts.

Investigate performance reduction in iPad app under heavy load. Analyze concurrent video processing. Resolve bottlenecks by serializing relevant processing tasks.

Investigate promises libraries to improve iOS app tests.

Adjust user workflows for user registration, teaching sessions and content browsing.

Improve French localization of iOS iPad app. Develop script to investigate missing or non-matching translations. Analyze and correct localized screen layout files.

Investigate legacy file caching implementation in iOS iPad app. Rewrite file caching module with extensive testing to cover multi-threading issues.

Replace Video Platform used in iOS app. Create prototype to simplify testing updated video player. Integrate in-house video platform into iOS app.

Replace RESTful API with JSON-RPC API. Implement intermediate server translating new JSON-RPC requests into old RESTful requests providing for a transition in small testable steps.

Create toolset to generate UML and ERD documentation of Ruby on Rails server backend source code. Generate documentation.

Adjust iOS app and backend for new requirements for iOS9.

Rebrand for custom white label use of iOS iPad app. Change colours, layouts, graphics and texts in iOS iPad app. Implement custom workflows in Ruby on Rails server backend.

Integrate god process monitoring framework, resque-retry and resque-web into Ruby on Rails server backend.

Analyze audio recording errors and implement solution for affected devices.

Rebrand iOS iPad App by changing colours, layouts, graphics and texts. Correct high priority issues in server backend.

Create a set of iOS apps (Üben brand) for practicing or learning specific topics for elementary school level. Topics are music notes, addition, multiplication, conversion, rounding. The apps share a common core implementation for the learning workflow. Artwork is developed with Inkscape in SVG format for easy scaling to different image dimensions. Scripts are developed to export artwork in all required image dimensions. Fastlane is used to automate development, testing and release process. Statistical data is collected in XML files or native databases (Core Data).

Updated custom Extended Apache PDFBox Library (developed for client during earlier project) with latest public code base.

Adjust custom Apache POI XWPF library to remove newer variants of AlternateContent when modifying document content. (Office Open XML, OOXML / Word2007).

Implement solution to merge PDF files, insert pages and add custom text on pages with customized PDFBox library.

Analyze compatibility of customized projects with JDK6 and adjust them to work with JDK6.

Extend custom Apache POI XWPF Library to handle Markup Compatibility correctly for insertion and removal of content (Office Open XML, OOXML / Word2007).

Updated custom Extended Apache PDFBox Library (developed for client during earlier project) with latest public code base.

Develop a cross-platform interactive vector graphics library for use with the languages Java, JavaScript and Scheme and on platforms JavaSE, Web browsers and mobile phones.

Updated custom Extended Apache POI HWPF Library (developed for client during earlier project) with latest public code base.

Updated custom Extended Apache PDFBox Library (developed for client during earlier project) with latest public code base.

Provide ongoing support for the enhanced Apache POI HWPF library (developed in earlier projects).

Extended the jTDS JDBC Driver (hosted on sourceforge) to correctly support XA (distributed transactions). (Existing XA support was unstable and lead to exceptions and even complete crashes of the database server. XA support was corrected to provide a production ready implementation.)

Extended the jTDS JDBC Driver (hosted on sourceforge) to correctly store and retrieve date and time values in different time zones especially during daylight savings change dates. (jTDS exposed multiple bugs regarding reading and writing date and time values. Especially values near daylight savings switch dates were impossible to process correctly. The project was carried out to correct all the date/time issues.)

Extended the Apache PDFBox Library (initially hosted on sourceforge) to fully support Incremental Updates. Incremental Updates allow filling form field data while preserving document signatures and usage rights. Usage rights allow saving PDF forms from within the Adobe Reader so the users do not need to own the fully functional and expensive PDF authoring suite.

Extended the Apache POI HWPF Library (formely part of Jakarta project) to improve and correct reading and writing capabilities of Word files adding support for Office Open XML (OOXML / Word2007).

Extended the Apache POI HWPF Library (formely part of Jakarta project) to improve and correct reading and writing capabilities of Word files (so called Word97 format, used by Word 97 - Word 2003).

Porting an industry register / catalog from ASP/MS-SQL to PHP5 with MySQL 5.x database; features of the catalog include user registration with confirmed opt in, presentation of user's contact and expertise details, sending inquiries to registered users by site visitors.

Implementation of a library which reads the ClientURLCache of Internet Explorer (various index.dat files with undocumented format)

Implementation of a library which creates indexes of seismic trace data and which supports indexed retrieval of information from such data; trace data contains up to millions of records; focus on minimum index size and fast operation.

Small cross platform application for selecting specific images out of a couple of thousand entries, previewing highlighted image and batch copying selected files to destination directory; optimized for use with bar code reader

Small cross platform application for image preview and batch rename, focus on fast responsiveness of GUI

Cross platform calculator with editable protocol and basic mathematical functions

module supports statistical analysis of "industrial designed experiments" for optimization of process parameters with minimal experimental efforts

module supports basic matrix calculations

module supports calculations for materials testing including complex unit conversion

Management of physical units, their scope of application and unit systems (SI, MKS, ...)

Development of a controller/data recording software under RTLinux and a data acquisition and visualization software under Java. (Scanning Laser Extensometers periodically observe the position of markers on objects which are to be deformed and determine the deformation profile from this information)

Control of operation modes and of components of Laser Extensometers (control of Laser, deflection unit, setup of operation modes of optical sensors, status query of Laser-controller, etc.)

(biaxial Laser Extensometer include a horizontal scan line in addition to the typically vertical scan line; the horizontal scan line must be positioned precisely during the experiment.)

(The certified calibration of a laser extensometer is done by automatically moving a marker throughout the measuring range and compare the results of the extensometer with a calibrated laser interferometer.)

Analysis of available solutions (open source and commercial products), tests and selection of products and projects, installation and development of usage guidelines

Developed module for realtime operating system (OsX) on Sorcus Modular 4/486 plug-in-board (ML8) . Developed interrupt controlled data acquisition and processing on personal computer. Developed data evaluation software in Windows.

Implemented an IO-port logger for Win95 to monitor port access. Analysed the recorded log files and derived the programming specification for the board. Implemented a driver in DOS.

Application of scanning laser extensometers for low cycle fatigue experiments with cyclic deformations

(measuring principle: Laser Differential Doppler Effect)

Developed a driver for integration of measuring systems as "device" in GPIB (ISA & PCI bus) . Carried out extensive debugging on chip and board level with use of digital storage oscilloscope to solve issues caused by specification errors of suppliers .

Implemented communication interface in measuring and data evaluation software. Implemented a plug-in for external testing machine software (Win32) for asynchronous communication with laser extensometer via RS232 (multi-threading) .

Created standard libraries for further use in software development. Merged various software variants with compiled settings (about 300 software variants) into configurable standard software packages (4 software packages) . Development involved data acquisition, interrupt handling, port IO, data visualisation, developer and end customer documentation .

Application in research and optimization of fuels (rocket propellant)

Analysed available RCSs (RCS, Source Safe, PVCS, MKS RCS/SI). Deployment of MKS Source Integrity on Novell Server 3.11, 4.20 and DOS- and Windows-clients.

Interrupt handling, port IO, dynamic loading of hardware drivers.

(Major part of project was diploma thesis)

Implemented data evaluation scripts in MatLab, carried out the calculations using PC-cluster . Implemented a data browser for offline-analysis of the data.

Implemented an MS-DOS device driver (character mode). Implemented a parser for analyzing CONFIG.SYS from within the device driver. Implemented menu based selection of boot configurations for the user. Adjusted source code of Turbo Vision library for use in device driver. Implemented a module for patching the memory image of CONFIG.SYS to apply the selected boot configuration . Implemented a mouse driver for use in the boot manager. Created user documentation.

Implemented a TSR program to log key presses and their timing. Implemented a program for starting a software and playing the recorded actions (purpose for the software is automated demonstration of MS-DOS based software on exhibitions) .

Extended existing software to support remote controlled setup of operation modes. Extended existing software to transfer measuring data and status information via GPIB.

Data acquisition, interrupt handlers, port IO. Data visualisation. Developer and user documentation.

MS Access, FileMaker, ACT, MySQL. Created software to convert and transfer data from one database to the other (Visual Basic for controlling database software, Watcom C for implementation of data converters) .

Implemented a perl script to generate static web pages on base of configuration, template and content files with support of language switching, creation of menus and sitemaps) . Initially used MS FrontPage.

Developed solutions for custom applications of laser extensometers. Personally carried out tests and demonstration measurements as well as leading the team for such activities . Created detailed quotations. Contract negotiations (German and English language). Created presentation material, documentation and papers (German and English). Travel activity in Europe, America and Asia. Presentations on conferences (German and English). Representation on international exhibitions.

TBD