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  • 11
    Electronic Resource
    Electronic Resource
    NC toolpath generation for arbitrary pockets with Islands (1996)
    Springer
    The international journal of advanced manufacturing technology 12 (1996), S. 174-179 
    Details
    ISSN: 1433-3015
    Keywords: Cutting path generation ; NC milling ; Pockets with islands
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract This paper presents an efficient algorithm for generating cutter paths for the NC milling of arbitrary pockets with multiple islands. In this algorithm, the pocket border and island profiles are made up of concave or convex segments comprising linear and circular arc elements. For the generation of NC tool paths, the algorithm is divided into four stages, namely, profile pre-processing stage, offset calculation, determination of the termination condition, and determination of the path sequence. Compared with the other pocketing algorithms, the main aspect of this work is that the pocket border and island profiles are pre-processed in the first stage of the algorithm. Making use of contour bridges in the profile pre-processing stage, the island profiles are connected to the pocket border profile to form a closed path. This then simplifies the calculations in cutter offsets and eliminates the problem of nesting which occurs in some other pocketing algorithms.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01351196
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  • 12
    Electronic Resource
    Electronic Resource
    Developing a knowledge-based injection mould cost estimation system by decision tables (1996)
    Springer
    The international journal of advanced manufacturing technology 11 (1996), S. 353-365 
    Details
    ISSN: 1433-3015
    Keywords: Decision table ; Injection mould ; Mould cost estimation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract This paper presents a knowledge-based costing system (DTMOLD-1) for an electrical appliance manufacturer to assist mould cost estimation at the early design stage. The system is developed in the form of decision tables. Through the use of decision tables, numerous interrelated variables and technical data in the injection mould cost estimation process are organised and presented. When the features of a plastic part are input, the DTMOLD-1 will generate an estimated cost of the injection mould required to produce the part. The rationale behind the system as well as the methodologies used in the developmental process are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01845694
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  • 13
    Electronic Resource
    Electronic Resource
    A study of the state-of-the-art rapid prototyping technologies (1998)
    Springer
    The international journal of advanced manufacturing technology 14 (1998), S. 146-152 
    Details
    ISSN: 1433-3015
    Keywords: Classifications ; Rapid prototyping ; Technological limitations
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Each rapid prototyping (RP) process has its special and unique advantages and disadvantages. The paper presents a state-of-the-art study of RP technologies and classifies broadly all the different types of rapid prototyping methods. Subsequently, the fundamental principles and technological limitations of different methods of RP are closely examined. A comparison of the present and ultimate performance of the rapid prototyping processes is made so as to highlight the possibility of future improvements for a new generation of RP systems.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01322222
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  • 14
    Electronic Resource
    Electronic Resource
    Parting line formation by slicing a 3D CAD model (1998)
    Springer
    Engineering with computers 14 (1998), S. 330-343 
    Details
    ISSN: 1435-5663
    Keywords: Parting line ; Slicing algorithm ; Undercut detection
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Technology
    Notes: Abstract An effective computer-aided parting line/surface formation algorithm can increase the overall efficiency in the mould design and manufacturing processes. The presence of free-form surfaces in a product model imposes a burden on mould makers to determine the parting line and parting surfaces. Previously proposed algorithms, although available, are few, and mainly deal with product with planar or simple curved surfaces. A new algorithm, which adopts an uneven slicing on the product model, is proposed. The algorithm provides a quick and effective way to locate the parting line and parting surface of a free-form product model.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01201764
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  • 15
    Electronic Resource
    Electronic Resource
    A Generic Framework for Supporting Internet Services to Achieve Customer Value Creation (2000)
    Springer
    Engineering with computers 16 (2000), S. 53-62 
    Details
    ISSN: 1435-5663
    Keywords: Key words. Client/server technology; Generic frame-work; Internet support; Software industry; Three-tier infrastructure; Value chain
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Technology
    Notes: Abstract. This paper discusses the current trends within the software industry that have affected the evolution of software support and its move to the Internet. Accordingly, it proposes a scheme for an Internet support framework within the software industry, and analyses the specific elements required for building and implementing such a system. The framework leverages and extends on strategic analysis discussed by Rayport and Viokla [1]. The evolution of ‘live’ support to Internet services emulates the evolution from the Physical Value Chain (PVC) to the Virtual Value Chain (VVC) discussed by them. In particular, the benefits of this proposed scheme to both the customer and the organisation are outlined.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003660050036
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  • 16
    Electronic Resource
    Electronic Resource
    Erratum (1990)
    Springer
    Catalysis letters 5 (1990), S. 331-331 
    Details
    ISSN: 1572-879X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00764679
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  • 17
    Electronic Resource
    Electronic Resource
    Behavioral responses of Ceratitis capitata flies to bait spray droplets and natural food (1992)
    Springer
    Entomologia experimentalis et applicata 64 (1992), S. 247-257 
    Details
    ISSN: 1570-7458
    Keywords: Ceratitis capitata ; bait sprays ; bird feces ; physiological state
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract In studies carried out on field-caged non-fruiting host trees, we examined effects of environmental and adult physiological and experiential state factors on responses of released Mediterranean fruit flies, Ceratitis capitata (Wiedemann), to droplets of proteinaceous bait (PIB-7) with or without 20% insecticide (malathion). We confirmed that fresh PIB-7 is both attractive and phagostimulatory to protein-deprived medflies and found that presence of 20% malathion ultra low volume concentrate (ULVC) in PIB-7 droplets does not significantly repel medflies from approaching droplets but does significantly deter feeding on them. A single relatively fresh deposit of bird feces, an important source of protein for medflies in natural environments, attracted several times more laboratory-cultured and wild medflies than 20 droplets of 80% PIB-7/20% malathion ULVC (about the average number of droplets per m2 of plant canopy in aerial bait spray programs). Attraction to protein was significantly greater among wild medflies deprived of protein continuously from eclosion than among wild medflies that had recent (within 3 days) or continuous access to protein. Attraction to protein increased significantly with increasing age (2, 7 and 12 days) of protein-deprived wild medflies. But we found no significant positive impact of recent brief experience of wild medflies with protein on degree of subsequent attraction to protein. In final experiments that mimicked the size, density and distribution of bait spray droplets on tree foliage typical for an aerial medfly control program, very few (4%) or no released protein-deprived wild medflies found a bait droplet within the 15 min test period even though most found a single deposit of bird feces. We conclude that the effectiveness of aerial bait sprays against medflies might be enhanced substantially (and the proportion of infested area treated with bait spray reduced considerably) by (1) including synthetic equivalents of attractive components of bird feces in the spray mixture, and (2) adjusting spatial and temporal patterns of bait spray applications according to estimates of the composition and abundance of natural medfly food and the age structure of medfly adult populations in infested regions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00341088
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  • 18
    Electronic Resource
    Electronic Resource
    Effects of recent experience on foraging in tephritid fruit flies (1996)
    Springer
    Journal of insect behavior 9 (1996), S. 571-583 
    Details
    ISSN: 1572-8889
    Keywords: experience ; foraging behavior ; Rhagoletis ; Ceratitis ; Tephritidae
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract In field-cage studies, we investigated how the foraging behavior of tephritid fruit flies is modified by experience immediately prior to release on host plants. We observed females of a relatively monophagous species,Rhagoletis mendax (blueberry maggot fly), an oligophagous species,Rhagoletis pomomella (apple maggot fly), and a polyphagous species,Ceratitis capitata (Mediterranean fruit fly). Just prior to release on a host plant, the following kinds of stimuli were supplied: (1) single oviposition in a host fruit, (2) contact with 20% sucrose, (3) contact with a mixture of protein food (bird feces and sucrose), (4) contact with water, and (5) a walk over a host-plant leaf. When flies foraged on host plants without resources, search was most intensive (as measured by number of leaves visited) following a single oviposition in fruit, but residence time generally was the same following exposure to sugar, protein, and fruit stimuli.Rhagoletis mendax andC. capitata females visited the fewest leaves following exposure to water or host leaves, whereasR. pomonella foraged equally intensively following exposure to food stimuli, water, or leaves. On host plants containing resources (fruit and protein food), a single oviposition dramatically increased the number of females of all three species that found fruit compared to females that received experience with food, water or foliar stimuli. We found no significant effect of recent brief experience with any of the stimuli on subsequent attraction to protein food. Overall,C. capitata exhibited a higher propensity to abandon host plants than eitherR. mendax orR. pomonella. We suggest that this may reflect adaptations to differences in distribution of host plants in nature, strategies of dispersal, and host range.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02213881
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  • 19
    Electronic Resource
    Electronic Resource
    Mediterranean fruit fly: interference of oviposition by radiation-sterilized females in field cages (1990)
    Springer
    Entomologia experimentalis et applicata 56 (1990), S. 125-130 
    Details
    ISSN: 1570-7458
    Keywords: C. capitata ; oviposition ; irradiation ; sex-ratio
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Résumé Les comportements de ponte et de repos et le nombre de rencontres de mouches irradiées ou non, d'une souche de laboratoire de C. capitata ont été examinés sur des pommes suspendues sur des goyaviers dans des cages, hors du laboratoire, à Hawaï. Le nombre de femelles non-irradiées stationnant sur les fruits était réduit de plusieurs fois par la présence de femelles irradiées, soit seules, soit avec des mâles irradiés, mais non par la présence exclusive de mâles irradiés. De même, le nombre de femelles non-irradiées en train de pondre, ainsi que la durée des pontes étaient réduits par la présence de femelles irradiées. Dans les cages témoins (sans mouche irradiée), les femelles restent en moyenne 255,9±15,0 sec (SE) sur les fruits, tandis que les femelles nonirradiées et irradiées mélangées dans les cages traitées, séjournent respectivement 157±19,8 et 77,5±7,5 sec sur les fruits. Les femelles irradiées se sont comportées capricieusement sur les fruits et ont souvent eu des contacts physiques avec les autres mouches. En réduisant la ponte des femelles normales, les femelles irradiées peuvent contribuer à supprimer les populations sauvages dans les programmes de lâchers d'insectes stériles.
    Notes: Abstract The behavior of nonirradiated and radiation-sterilized laboratory-adapted Mediterranean fruit flies, Ceratitis capitata (Wiedemann) (Diptera: Tephritidae), was observed on apples hung on guava trees in outdoor cages in Hawaii. Oviposition and resting behavior, and physical encounters between flies were recorded. The numbers of nonirradiated females observed resting on fruit were reduced several fold by the presence of irradiated females, either alone or with irradiated males, but not by irradiated males alone. Similarly, the number and duration of nonirradiated females observed ovipositing was reduced by the presence of irradiated females. In control cages (all nonirradiated flies), females averaged 255.9±15.0 (SE) seconds on fruit, while nonirradiated and irradiated females in the mixed (treatment) cage averaged 157±19.8 seconds and 77.5±7.5 seconds on fruit, respectively. Irradiated females behaved skittishly on fruit and frequently engaged in physical encounters with other flies. By reducing oviposition of normal females, irradiated females may help suppress wild populations in sterile-insect release programs.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00163454
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  • 20
    Electronic Resource
    Electronic Resource
    Amorphous structure in laser clad Ni-Cr-Al coating on Al-Si alloy (2000)
    Springer
    Journal of materials science 19 (2000), S. 1193-1196 
    Details
    ISSN: 1573-4811
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1006727730339
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