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ISHM invites papers for the above Conference, to be held on 29–31 May 1991 in Rotterdam, The Netherlands. Papers should cover areas such as: design, manufacturing, packaging and interconnection, materials and processing, applications, reliability, components, new technologies, marketing and economics, optoelectronics. Summaries should be in English, length 200–300 words. The deadline for receipt of summaries is 30 September 1990. (For full details, see announcement on pp. 54–55.)

This event, the first sponsored by ISHM, takes place in Pardubice on the 19–20 November 1991. Pardubice is a town of some 100,000 inhabitants about 60 miles east of Prague. A welcome is extended to all ISHM Chapter members.

Following the discussion at our recent Annual General Meeting, a questionnaire was sent out to all members. Almost half of them replied despite the fact that the time allowed for returning the questionnaire had been kept very short. Some members even provided detailed comments.

Dates: 23–24 March 1994 Venue: Palais des Congrès, Porte Maillot, Paris The Fifth Microelectronics Salon (Hybrids, SMT, ASICs, Packaging) will take place on the above dates. This showcase for manufacturers, suppliers of products and equipment, and sub‐contractors to all sectors of these industries will be accompanied by a series of conferences.

The purpose of this paper is to theorize the existing idea of subjective probability a la Keynes’s Treatise on Probability Theory. Then to show that, under the especial kind of financial valuation model in the absence of interest rate and speculation, subjective probability is not of a major concern in Islamic financial theory.

The topic is of an epistemological nature premised on the Islamic unity of knowledge and the world-system with special attention given to the formulation of the financial model for evaluation under its unitary characteristic at each time period of financial evaluation. The approach, while being epistemological, is also mathematical in the financial valuation field.

Mathematical calculation of approximate solution using Newton-Raphson method applied to Islamic financial valuation model with yields, evolutionary learning and of the nature of unitary discursive experience at every stage of valuation taken continuously establishes the innovative method approximating subjective probability of events to limiting negligible field.

The nature and importance of Islamic valuation models brings about the implication of diversification of risk and production diversification that altogether underlie the limiting phenomenon of subjective probability in a narrow closure.

The epistemological implication of unity of knowledge and unity of the specific events during the valuation experience causes the socio-economic system to gain increasing levels of stability and certainty while subjective probability narrows down in its small closure.

This paper is boldly original in the light of its methodology that addresses the much pursued topic of subjective probability in the Islamic heterodox economic and financial field.

Crowdsourcing – a form of collaboration across organizational boundaries – provides access to knowledge beyond an organization’s local knowledge base. Integrating work on organization theory and innovation, the authors first develop a framework that characterizes crowdsourcing into a main sequential process, through which organizations (1) define the task they wish to have completed; (2) broadcast to a pool of potential contributors; (3) attract a crowd of contributors; and (4) select among the inputs they receive. For each of these phases, the authors identify the key decisions organizations make, provide a basic explanation for each decision, discuss the trade-offs organizations face when choosing among decision alternatives, and explore how organizations may resolve these trade-offs. Using this decision-centric approach, the authors continue by showing that there are fundamental interdependencies in the process that makes the coordination of crowdsourcing challenging.

Attenuation characteristics of microstrip transmission lines on alumina substrates up to 50GHz are discussed. The lines under test came from three different manufacturers, each of whom used different processes to realise the transmission lines. Two of the manufacturers used silver (Ag) paste, whereas the process of one of the manufacturers was copper (Cu) based. Each manufacturer used identical alumina substrates and identical test pattern files so that the measured attenuation properties reflected manufacturer’s capability to fabricate microstrips and the quality of the metal system used. Measurements showed that the attenuation of copper microstrips was slightly lower than that of the silver microstrips, but the difference was small. Measured attenuation (S21) of about 50Ω microstrips was approximately 0.5db/cm at 30GHz and 0.8dB/cm at 50GHz, respectively. The loss coefficient, α_t, of about 0.035dB/mm at 40GHz was obtained for the Cu microstrips. Such an attenuation is reasonable for many practical applications in the microwave and millimetre wave regions.

‘The Choice between Chip and Wire and High Density Surface Mount Packages (MCM‐X, COB, etc.)’ was the title of the above event. One of a regular series held by ISHM‐France, this technical seminar was attended by over 100 members and non‐members of ISHM who were eager to hear of the latest developments in the field of multichip modules. The eight papers presented are summarised below: