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[eurolisp] Fwd: Position: Common Lisp Developer: Marbella, Spain
by Arthur Lemmens 10 Oct '05

10 Oct '05

Forwarded from comp.lang.lisp: > Reply to: employment(a)ravenpack.com > > Position: Common Lisp Developer > Post Date: 7 October 2005 > Available: Immediately > Company: RavenPack International, S.L. > Location: Marbella, Spain > > > Overview: > > Position immediately available for an experienced, motivated software > professional. You will work with an international team of developers > and scientists with backgrounds and interests in computing, > psychology, linguistics, finance, mathematics, anthropology, and > philosophy. > > > Description: > > The ideal candidate will have excellent skills as a computer scientist > and software engineer, with experience delivering quality software. > You must be fluent in standard software development practices on > current operating systems. If you are not already an expert in Common > Lisp, you will become one. Innovative problem solving and engaging > human interaction are key. > > + Design and implement maintainable software in Common Lisp based on > loose and changing specifications, with a high degree of > independence. > > + Interface to and build solutions in other languages such as Java, C, > Unix scripts, or Visual Basic. Use the best tool for the job. > > + Familiarity with SQL and specifically Oracle 9i RDMBS including > query optimization and PL/SQL is very much a plus. > > + Comfort in a growing, fast-paced environment with a premium on > problem solving. Must have the flexibility to do whatever needs to > be done to solve the problems correctly. > > + Work successfully in a small team environment, with a willingness to > teach and to learn. Lead reviews of your code and participate in > the reviews of others. > > Business at RavenPack is conducted mostly in English. Solid writing > and verbal skills in English are required. Knowledge of Spanish is > not a business requirement. > > Current European Union legal working status is preferred. > > > About the Employer: > > RavenPack is committed to expanding the frontiers of Artificial > Intelligence by delivering Business, Financial, and Government > solutions. RavenPack collaborates with its private and public sector > clients to help them turn large amounts of data into vital knowledge. > > RavenPack provides corporate and government clients with global > consulting services and analytical solutions. RavenPack delivers > intelligence services in the areas of finance and investment through > its flagship solution called the RavenSpace Market Intelligence > System® (MIS). The MIS® offers real-time analytical trading tools to > help investors understand the numerous factors that affect market > prices. The MIS® combines models from the three major forecast groups > (technical, fundamental, and market psychology) to produce timely > investment recommendations and to automatically execute trades. > > http://www.ravenpack.com/ >

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[eurolisp] [ANN] ContextL 0.1
by Pascal Costanza 11 Sep '05

11 Sep '05

Hi everyone, I have just released ContextL 0.1 at http://common-lisp.net/project/ closer/contextl.html Major changes: - There were unnecesarry &allow-other-keys declarations in some places which didn't buy anything but removed some useful runtime checks. (In the ContextL presentation in Munich, I was able to say :layered-accessors instead of :layered-accessor, and this was indeed caused by unnecessary &allow-other-keys declarations.) - The naming convention for methods on layered functions has been removed. Instead, one can now say define-layered-method, which is in fact now the preferred way to define layered methods. (Thanks to Bjoern Lindberg and Thomas F. Burdick for insisting!) - It's now possible to say with-inactive-layers. This was one of the most requested features at this young age of ContextL. Thanks to Thomas F. Burdick, Peter Herth, Boern Lindberg and Jim Newton for helping me out with finding a good name for that construct. ;) Cheers, Pascal -- OOPSLA'05 tutorial on generic functions & the CLOS Metaobject Protocol ++++ see http://p-cos.net/oopsla05-tutorial.html for more details ++++ Pascal Costanza, mailto:pc@p-cos.net, http://p-cos.net Vrije Universiteit Brussel, Programming Technology Lab Pleinlaan 2, B-1050 Brussel, Belgium

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[eurolisp] Munich Lisp Meeting
by tfb＠ocf.berkeley.edu 08 Sep '05

08 Sep '05

------- Start of forwarded message ------- From: Peter Herth <p.herth(a)t-online.de> Newsgroups: comp.lang.lisp Subject: Munich Lisp Meeting Date: Thu, 08 Sep 2005 08:45:05 +0200 Organization: T-Online Message-ID: <dfomli$8qu$01$1(a)news.t-online.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Hi, tomorrow, the 9.9, there will be a meeting of the Munich Lisp Group. As a special guest, Pascal Costanza will join us and talk about: "Language Constructs for Context-oriented Programming". The meeting will take place at 18.00 at the LMU, Oettingenstr. 67 Room Takla-Makan Z11 Main Entrance, downstairs, through the room opposite to the toilets. Downstairs: ____________________________________ | | | | | Z9 | Z10 | Z11 | | | | | |____/ __|____/ ___|______/ _________|___ | |________/ __________________________ | | | | | Z8 | ------ -------| | Z7 | | | |_____/ ________| | | -----------| |----------------- ___________ _ _________ |/ /| Stairs | |WC | |||| | ------------------------- Entrance Level: -------------------------------- _______/ _____ _______ | | | Stairs | | | | |||| | -------/ -------------------- | | ^ Main Entrance Peter -- pet project: http://dawn.netcologne.de homepage: http://www.peter-herth.de lisp stuff: http://www.peter-herth.de/lisp.html get Ltk here: http://www.peter-herth.de/ltk/ ------- End of forwarded message -------

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[eurolisp] Beer/Istanbul/Today
by Luke Gorrie 03 Sep '05

03 Sep '05

Anyone? If so call me on +46 701 040 041 - I'm buying :-) NB: European side, on topic!

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[eurolisp] cl-launch.sh
by Faré 24 Aug '05

24 Aug '05

It's just a silly little script, but I'm proud of cl-launch.sh: http://www.cliki.net/cl-launch It should make it much easier to write little command-line utilities in semi-portable Common Lisp. I've tried to make it robust, and as a result it's somewhat over-engineered and difficult to hack. But hopefully, it is well-documented and easy to use. Please help me test it, spread it, etc. It's one step to integrating common lisp to the unix command line (until the unix command line can be integrated into common lisp). I hope some of you find it useful. Satisfied user messages and hacker improvements welcome. So are ports to more Common Lisp implementations... [ François-René ÐVB Rideau | Reflection&Cybernethics | http://fare.tunes.org ] Most economic fallacies derive... from the tendency to assume that there is a fixed pie, that one party can gain only at the expense of another. -- Milton Friedman

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[eurolisp] [ANN] OOPSLA'05 CLOS tutorial
by Pascal Costanza 22 Aug '05

22 Aug '05

OOPSLA'05 tutorial on generic functions and the CLOS Metaobject Protocol ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Town and Country Resort & Convention Center, San Diego, California Sunday, October 16, 2005, 13:30 - 17:00 See http://p-cos.net/oopsla05-tutorial.html Abstract. The Common Lisp Object System (CLOS) is unique in two ways. + In most OOP languages, methods belong to classes and are invoked by sending messages. In CLOS, methods belong to generic functions instead of classes, and those generic functions select and execute the correct method according to the types of the arguments they receive. + The CLOS Metaobject Protocol (MOP) specifies how its essential building blocks are to be implemented in CLOS itself. This allows extending its object model with metaclasses that change important aspects of CLOS for a well-defined scope. This tutorial introduces these two notions. I will develop - live during the tutorial - the code for an interpreter for generic functions that performs selection and execution of methods. I will then discuss how that code can be extended to introduce, for example, multimethods and AOP-style advices, and sketch how generic functions are implemented efficiently in the "real" world. In the second part, I will illustrate the extensibility of the CLOS MOP by implementing - live - the (hashtable-based) Python object model as a metaclass. Other practical extensions based on the CLOS MOP are also sketched, like object-relational mappings, interfaces to foreign-language objects, and domain-specific annotations in classes. The audience will learn about the basic concepts of generic functions and metaobject protocols. They will get the necessary insights and pointers to existing literature and online material to deepen their knowledge. The focus of the tutorial is not on technical details but on the general ideas. A good understanding of class-based OOP is required. Experience with Lisp may be helpful, but the tutorial is specifically targeted at non-Lispers. Feel free to contact me if you have any questions and/or suggestions. Pascal

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[eurolisp] [ANN] First public release of ContextL
by Pascal Costanza 22 Aug '05

22 Aug '05

Hi everyone, I have just uploaded a first release of ContextL. It's both a non- trivial example of using the CLOS MOP and a full-fledged library in its own right, providing constructs for context-oriented programming. See http://common-lisp.net/project/closer/contextl.html for more information. Cheers, Pascal -- OOPSLA'05 tutorial on generic functions & the CLOS Metaobject Protocol ++++ see http://p-cos.net/oopsla05-tutorial.html for more details ++++ Pascal Costanza, mailto:pc@p-cos.net, http://p-cos.net Vrije Universiteit Brussel, Programing Technology Lab Pleinlaan 2, B-1050 Brussel, Belgium

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[eurolisp] [ANN] A few announcements
by Pascal Costanza 09 Aug '05

09 Aug '05

Hi, My website has moved to a new location and has a new design. You can now find it at http://p-cos.net This affects a few Lisp-related pages. Especially: - My "highly opinionated" Lisp guide is now at http://p-cos.net/lisp/ guide.html - the old location at www.pascalcostanza.de / www.cs.uni- bonn.de will be removed soon. - The archive for the 1st European Lisp and Scheme workshop has moved to http://p-cos.net/lisp-ecoop/ - I won't remove the old archive soon, but cannot guarantee any degree of longevity. Note that the site for the 2nd instance of that workshop is not affected since it is maintained by Hans Huebner. - On a related note, I am going to give a tutorial about generic functions and the CLOS Metaobject Protocol at this year's OOPSLA. See http://p-cos.net/oopsla05-tutorial.html (The need for a tutorial website was the main motivation to finally get the new website up and running.) I appreciate if people who have linked to the material above could update the respective links. Thanks a lot! Cheers, Pascal -- A discussion that tries to kill a useful feature is not a "practical" discussion but a "religious" one. - Kent M. Pitman

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[eurolisp] [ANN] Closer Project: new software versions
by Pascal Costanza 03 Aug '05

03 Aug '05

Hi, New versions of MOP Feature Tests and Closer to MOP are available. MOP Feature Tests checks whether CLOS MOP features, as specified in "The Art of the Metaobject Protocol", are available in a given Common Lisp implementation. Closer to MOP provides a compatibility layer that irons out some of the incompatibilities across various CLOS MOP implementations. Highlights of the new versions: - A number of new implementations are now supported, including Allegro Common Lisp 7.0, CLisp 2.34, CMU CL 19b, LispWorks Professional 4.4.5, Macintosh Common Lisp 5.1, OpenMCL 0.14.3 and SBCL 0.9.3. - The software is now available as a set of darcs repositories. - Various fixes in Closer to MOP. - Added a convenience method ensure-method. - Switched to an MIT/BSD-style license. I am using the Closer to MOP compatibility layer for my own software, which consists of non-trivial extensions of CLOS. This has led to overall improvements of stability. See the project website at http://common-lisp.net/project/closer/ for further details. Cheers, Pascal -- Tyler: "How's that working out for you?" Jack: "Great." Tyler: "Keep it up, then."

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[eurolisp] Fwd: Lisp (and Prolog, and a bit of KR) job, University of Newcastle upon Tyne, UK
by Arthur Lemmens 08 Jul '05

08 Jul '05

Some of you may be interested in the following Lisp job announcement (forwarded from comp.lang.lisp). Arthur ---- Doorgestuurd Usenet-bericht ---- Van: Hamish Harvey <hamish(a)hamishharvey.com> Newsgroepen: comp.lang.lisp Onderwerp: Lisp (and Prolog, and a bit of KR) job, University of Newcastle upon Tyne, UK Datum: Fri, 08 Jul 2005 12:44:37 +0100 URL: news://<dalov5$kmp$1(a)ucsnew1.ncl.ac.uk> > I imagine that, regardless of the resurgent status of Lisp, jobs are still > thin enough on the ground for job notices to be welcomed here! > > The School: http://www.ceg.ncl.ac.uk/ > The University: http://www.ncl.ac.uk/ > The job: http://www.ncl.ac.uk/vacancies/vacancy.phtml?ref=D528R > > The Earth Systems Engineering group in the School of Civil Engineering and > Geosciences at the University of Newcastle upon Tyne, UK, are developing > software to support flood risk management. The core of this software is a > computation engine capable of taking definitions of rather complex, > multi-dimensional calculations and enacting them. The computation engine > will implement a domain specific language (DSL) designed to support the > expression of these computations in a declarative way. This language and > computation engine are being designed to provide the core of a wide range > of decision support systems from tools to support interactive analysis of > ill-specified problems to flood forecasting systems which depend on the > continuous, unattended assimilation of incoming data. > > The calculations involved in flood risk management involve embedding > numerical simulation of (parts of) the flooding system within layers of > higher level calculations to derive measures of flood risk (e.g. in > expected annual damage), or change in flood risk resulting from particular > interventions, or the sensitivity of particular outputs to uncertainty, > or .... The goal, in general, is to maximise the value of investment in > measures to address flood risk. Aspirations in the flood risk management > community far exceed what is feasible using current technology. To the > extent that such calculations are currently possible, they are achieved > using combinations of software packages and a great deal of munging of data > files. This approach is tedious and error-prone. It almost completely > obscures the structure and meaning of the underlying calcualtions, imposing > huge cognitive load on those undertaking them. It will not scale much > beyond the complexity of problem currently being tackled. > > The DSL under development by contrast allows these calculations, in their > full multi-dimensional glory, to be expressed succinctly in a form which is > amenable to human understanding but which can be compiled into an > executable form. Humans are more involved in defining calculations than > doing them. The language is declarative, based around a formalisation of > the concept of a "reference frame", which allows the structure of a > calculation (and of data sets) to be expressed explicitly (in imperative > implementations this structure is implicit in the control structure of the > code). > > The design of the semantics of the language is well progressed, but subject > to refinement as implementation proceeds. A limited prototype computation > engine exists which implements basic aspects of this language. The position > available is for a software developer to join me in working on this > prototype, which is written in Common Lisp (making extensive use of Lisp's > code-which-writes-code-which-writes-code capabilities). The work will > involve significant creative input at the abstract, conceptual level as > well as in translating from this abstract level into working code. It will > also involve applying the developing prototype to realistic flood risk > analysis case studies. > > Initial prototyping is using an ad hoc, s-expression-based concrete syntax > for the language. A further thread of development is to express the > language in a full knowledge representation language (which may dictate > changes to the abstract syntax). Part of the purpose of developing the > language is to support the expression of complex calculations succinctly in > a knowledge representation language. This language will then provide a > point of integration of a wide range of tools which operate in terms of the > structure of the calculation definitions, of which the computation engine > is but one. > > A draft report on the software is available. This has been written for an > audience of flood risk management professionals, not computer scientists or > software developers. It still needs a great deal of polishing, but > nonetheless sets out the breadth of the vision behind this project. The > draft is temporarily available at > > http://www.floodrisknet.org.uk/Members/hamish/draft-framework-report.pdf > > Funding is initially available for two years, and the appointment is fixed > term. The intention is to obtain additional funds to continue this work for > some time, though this is subject to the vagaries of academic funding. My > own position is also dependent on obtaining this funding, so I am highly > motivated in this regard! > > The software will be released under an open source license in due course. > > Please feel free to ask questions (about the job or the software). I will be > away for the first half of next week, so a failure to respond immediately > should not be taken as a lack of interest! > > Cheers, > Hamish >

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