The Fourth Week of Lent - pantasaph.org.ukpantasaph.org.uk/@pdf_newsletter.pdf · St. David’s at...
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Computer Communications, Special Issue on FDTs Use Case Maps and Lotos for the Prototyping and Validation of a Mobile Group Call System p. 1 Use Case Maps and LOTOS for the Prototyping and Validation of a Mobile Group Call System Daniel Amyot and Luigi Logrippo School of Information Technology and Engineering (SITE) 150 Louis-Pasteur, University of Ottawa, Ontario, Canada, K1N 6N5 +1 613 562 5800 (ext. 6704) [email protected], [email protected] ABSTRACT — SPEC-VALUE, a rigorous scenario-driven approach for the description and validation of complex sys- tem functionalities at the early stages of design, is presented. It is based on two notations. The first notation, called Use Case Maps (UCMs), is used to capture functional requirements. UCMs can help reasoning about system-wide functionalities at a high level of abstraction before a prototype is generated. The second notation is the formal specifi- cation language LOTOS. UCM scenarios are translated into LOTOS specifications, which animate UCMs with the help of tools. LOTOS-based techniques, especially specification-level testing, can be used to validate designs. It is shown how SPEC-VALUE can help to produce better-quality designs and standards and to improve human understanding with reduced time and costs. A real-life case study is provided: the Group Call service of the mobile data system General Packet Radio Services (GPRS). KEY WORDS: Causal Scenarios, LOTOS, Telecommunications Standards, Use Case Maps, Validation Testing. 1. INTRODUCTION 1.1 The Design and Standardization Challenges Numerous industries and standardization bodies (ITU, ISO, ANSI, ETSI, TIA, etc.) are con- stantly at work to design new telecommunications products and new standards for such products, involving increasingly complex functionalities. These services require increasingly complex archi- tectures and protocols. In the early stages of many conventional design processes used in industry and in standardization bodies, many features, services, and functionalities are described using informal operational descriptions, tables and visual notations such as Message Sequence Charts (MSCs) [26]. As these descriptions evolve, they quickly become error-prone and difficult to man- age. The need of precisely documenting all stages of the design process, which is very important in the industrial environment, becomes critical in the standardization process, where there is inter- national scrutiny for which the stages are formalized and must undergo formal review and approval [3]. The following issues should be addressed:
Transcript of The Fourth Week of Lent - pantasaph.org.ukpantasaph.org.uk/@pdf_newsletter.pdf · St. David’s at...
St. David’s at Pantasaph 2020 - Keeping in touch
The Fifth Week of Lent
Dear parishioners,
Welcome to our second edition of ‘Keeping in touch’. I sincerely hope that this ‘modest’ webpage will serve it’s purpose of helping us all to feel still ‘in touch’!
During a short walk in the beautiful sunshine of Thursday afternoon, I took a little rest at the bench on the road from Carmel to Gorsedd, enjoying the welcome heat and relaxation as I contemplated the awesome stillness of the moment. It was quite easy to appreciate the words of the psalmist, ‘Be still and know that I am God’, even in the midst of the current Coronavirus scourge.
Hopefully some of you might find a little help and comfort from reading this week’s page! Live Streaming is now ‘all the rage’: it enables you to watch a live Mass and other church services via the internet. You may to wish to try one of these links: How to watch Mass online; http://www.catholictv.org/masses/catholictv-mass ; Walsingham is a favourite: https://www.walsingham.org.uk/live-stream/ .
This Sunday 29th March, the Re-dedication of England to Our Lady, will take place throughout the country in homes and chuches. We are invited to join in with our own prayers.
Here is a prayer we could use To you we entrust the Church, which invokes you as Mother. On earth you preceded her in the pilgrimage of faith .
Comfort her in her difficulties and trials.
Make her always the sign and instrument of intimate union with God and of the unity of the whole human race.
To you, Mother of the human family, and of the nations, we confidently entrust the whole of humanity with its
hopes and fears. Let it not lack the light of true wisdom.
Guide it to seek freedom and justice for all. Direct its steps in the ways of peace. Enable all to meet Christ,
the Way, the Truth and the Life.
Plead for us thy children, whom thou didst receive and accept at the foot of the Cross, O sorrowful Mother.
Here are a couple of links you may wish to try.
https://catholicherald.co.uk/editorial-the-church-and-the-plague-and-the-catholic-herald/
Lent: ‘A Question of Forgiveness’ (Thinking Faith) (https://mailchi.mp/thinkingfaith/prayer-and-forgiveness-at-home?
e=ccc72b22ef)
‘We are invited’ this Lent, ‘to fall in love with Jesus, to have him as our dearest friend and brother. In the
mirror of his loving gaze we see a reflection of ourselves as we truly are: sinners, yes, but loved and forgiven
sinners. We have heard Jesus invite us to walk with him, to share in his ministry of healing. He invites us to
proclaim the reign of God in our world in order to transform it’.
(from ‘Sacred Space’)
May the Lord Bless you all, and keep you in his peace. (Contact us on 01352 711053—not always manned; Mobile: 07856363760) Br. John.
Intentions for our Masses (Offered privately by our priests)
Sunday People of the Parish
Monday Friars & Benefactors
Tuesday Denbigh Foundation
Wednesday Eric Rhodes RIP
Thursday Joan Oates (birthday)
Friday Letitia Shaw
Saturday David M Parry RIP
Please pray for our sick
Sr. Carrie, Eliza Brizzi, Bob Lavery, Oonagh Foster,
Pat Sandham, Ray Norman, Mary Toumaine, Kim
Pemberton, Clare Tyson, Glynis Begley and Richard
Oates.
Anniversaries
Bridget Golightly, Rose Molloy, Sr. Therese M. Barnett,
John Wilk, Vincent Dilworth, and Margaret Barratt.
May they rest in peace.
