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  • 1
    Electronic Resource
    Electronic Resource
    Development of an expert system for preliminary risk assessment of existing concrete dams (1988)
    Springer
    Engineering with computers 3 (1988), S. 137-148 
    Details
    ISSN: 1435-5663
    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 The paper presents an expert system to assist in the field inspection of existing concrete dams within the context of a preliminary risk assessment. The paper describes the engineering knowledge and reasoning required to conduct a deterministic field evaluation of the structural stability of the dam. The symptoms and failure modes identified by the expert system along with the required knowledge and procedures are organized in a structured knowledge tree. The instantiation of the frames and firing of the rules for each consultation traces part of the inference tree contained in the structured knowledge tree. Interaction between nearly decomposable problems are executed with metaknowledge procedures, shared rule groups, and active values. Examples are provided.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01349625
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  • 2
    Electronic Resource
    Electronic Resource
    An expert system for field inspection of concrete dams: Part 1, engineering knowledge (1989)
    Springer
    Engineering with computers 5 (1989), S. 23-38 
    Details
    ISSN: 1435-5663
    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 covers in more detail the material that was introduced in Ref. [1] and describes the final engineering reasoning and knowledge used for an expert system to assist during the field inspection of existing concrete dams. The knowledge base of this expert system was created by combining the traditional expert system approach with the reasoning procedures of qualitative physics. The traditional expert system approach was used to identify the shallow knowledge pertaining to the problem, and qualitative physics was used to identify the deep knowledge. The deep knowledge structured and organized the identification and representation of the shallow knowledge. The expert system uses shallow knowledge to combine a qualitative expert reasoning with a quantitative procedural evaluation of the stability of a dam. The present paper concentrates on the description of the engineering knowledge and Ref. [2] will concentrate on the artificial intelligence issues associated with the knowledge acquisition and representation associated with this expert system. The validation process compared results obtained by the expert system with those obtained by independent field inspection experts. Some of the results are presented here.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01201995
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  • 3
    Electronic Resource
    Electronic Resource
    Final-state interactions and repulsive Coulomb effects ind+3He→3H+p+p reaction (1986)
    Springer
    Few body systems 1 (1986), S. 63-68 
    Details
    ISSN: 1432-5411
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Differential cross sections of the reactiond+3He→3H+p+p have been measured atE d =23.083 MeV in two different kinematical configurations. A gas target was used in order to obtain absolute differential cross sections and two ΔE−E telescopes allowed a very good identification of the various particles coming from thed+3He reaction. The role of the finalstate interactions and repulsive Coulomb effects appears rather distinctly.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01075292
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  • 4
    Electronic Resource
    Electronic Resource
    Classroom Innovation: Games to Make Chemistry More Interesting and Fun (2000)
    Springer
    The chemical educator 5 (2000), S. 167-170 
    Details
    ISSN: 1430-4171
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Many students of agronomy engineering, who are required to take organic chemistry, find the class unpleasant and uninteresting because they feel forced to learn concepts that they regard as irrelevant to their career plans. When this lack of motivation is combined with limited self-discipline, students don’t study and, thus, fail to learn the subject. This paper presents a method of adapting the course materials and methodology to the student’s needs by the inclusion of appropriate games. These games help to create a less formal atmosphere and add variety to the class, and they can even be used as methods of evaluation. Students exposed to this method are more apt to experiment and participate freely in class.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s00897000393a
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  • 5
    Electronic Resource
    Electronic Resource
    Final-state interactions and quasi-free mechanism in the3He(d,3Hp)p reaction (1989)
    Springer
    Few body systems 6 (1989), S. 175-181 
    Details
    ISSN: 1432-5411
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A measurement of absolute differential cross sections of the3He(d,3Hp)p reaction atE d=23.083 MeV shows the importance of the quasi-free reaction (QFR) mechanism. The observation of a prominent QFR peak indicates that complicated multiple-scattering processes may not be so important as to prevent a simple phenomenological analysis based on two-body interactions. In this respect we isolate final-state-interaction (FSI) effects related toS andP wave3H-p interactions. In particular, the FSI, associated with the4He level at 25.5 MeV of excitation energy, plays a dominant role.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01229462
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  • 6
    Electronic Resource
    Electronic Resource
    Algorithms for Fuzzy Segmentation (1999)
    Springer
    Pattern analysis and applications 2 (1999), S. 73-81 
    Details
    ISSN: 1433-755X
    Keywords: Key words: Dynamic programming; Fuzzy pattern recognition; Greedy algorithms; Medical imaging; Segmentation; Thresholding
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Notes: Abstract: Fuzzy segmentation is an effective way of segmenting out objects in pictures containing both random noise and shading. This is illustrated both on mathematically created pictures and on some obtained from medical imaging. A theory of fuzzy segmentation is presented. To perform fuzzy segmentation, a ‘connectedness map’ needs to be produced. It is demonstrated that greedy algorithms for creating such a connectedness map are faster than the previously used dynamic programming technique. Once the connectedness map is created, segmentation is completed by a simple thresholding of the connectedness map. This approach is efficacious in instances where simple thresholding of the original picture fails.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s100440050016
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  • 7
    Electronic Resource
    Electronic Resource
    Trois Notes sur la théorie des formes (1881)
    Springer
    Mathematische Annalen 18 (1881), S. 280-288 
    Details
    ISSN: 1432-1807
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01445853
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  • 8
    Electronic Resource
    Electronic Resource
    Calorimetric Investigations of Some Phases in the System Sodium Fluoride - Aluminium Fluoride (1999)
    Springer
    Journal of thermal analysis and calorimetry 56 (1999), S. 51-57 
    Details
    ISSN: 1572-8943
    Keywords: DSC ; enthalpies ; NaAlF4 ; Na5Al3F14
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Beside the two well-known minerals cryolite, Na3AlF6, and chiolite, Na5Al3F14, the binary system NaF-AlF3 also contains a third compound, NaAlF4, sodium tetrafluoroaluminate. Solid NaAlF4 has been prepared from its vapour under controlled conditions. The stability of NaAlF4 has been investigated by differential scanning calorimetry. It is shown that the disproportionation of the compound: 5NaAlF4(s)=Na5Al3F14(s)+2AlF3(s) takes place at considerable rate between 700 and 900 K. The enthalpy of this reaction is calculated and found to be -66.9 kJ. Enthalpies of the two solid state transitions α-Na3AlF6 → β-Na3AlF6 and α-AlF3 → β-AlF3 have also been measured and new values are reported. The enthalpy of formation of chiolite, Na5Al3F14, at 900 K has been recalculated from enthalpy increment data obtained by drop calorimetry. A value of ΔH900 o = -7513.6±12.0 kJ mol-1 has been obtained. This value is in disagreement with the recommended value given in JANAF Thermochemical Tables given at 900 K ΔHf o = -7559.2 kJ mol-1.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1010175006354
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  • 9
    Electronic Resource
    Electronic Resource
    Reduced human lymphocyte blastogenesis and enhancement of adenosine triphosphate (ATP) by L-carnitine (1994)
    Springer
    Molecular and cellular biochemistry 131 (1994), S. 1-8 
    Details
    ISSN: 1573-4919
    Keywords: lymphocytes ; PHA ; DNA ; blastogenesis ; ATP ; L-Carnitine
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Notes: Abstract Carnitine is associated with lipid synthesis and its deficiency may lead to cardiomegaly with parenchimal lipid in the heart, kidney and liver. In our study we found that pretreatment of peripheral blood mononuclear cells (PBMC) with serial dilutions of L-Carnitine (100μg/ml-1 pg/ml) inhibits, in a dose-dependent manner, lymphocyte DNA synthesis stimulated with PHA (20 μg/ml). L-Carnitine did not have any effect on resting PBMC. The maximum inhibition was found at 10 μg/ml of L-Carnitine. Moreover, in a time-course study and using an enzymatic analysis (ATP monitoring reagent), L-Carnitine enhanced ATP production on PBMC treated and untreated with PHA, reaching a maximum effect at 30 min incubation. In another set of experiments PBMC were treated with L-Carnitine alone and in combination with PHA, and the percent of receptors CD3, CD4, and CD8 were calculated with flow cytometry. After the cell incubation with L-Carnitine, the percent of all receptors studied did not change compared to L-Carnitine-untreated cells (controls). These data suggest that L-Carnitine inhibits, in a dose-dependent manner, lymphocyte blastogenesis induced by PHA, probably through the enhancement of ATP synthesis, which is considered an inhibitor of phospholipase C activity and a suppressor in lymphocyte cultures.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01075718
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  • 10
    Electronic Resource
    Electronic Resource
    The absence of a mixed-alkali effect in the leaching of corrosion-resistant glasses (1985)
    Springer
    Journal of materials science 20 (1985), S. 1027-1032 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Alkali depth profiles in water-leached glasses with molar composition 16A2O·8CaO· 2MgO·1Al2O3·73SiO2 (A=Na, K and Na+K) were determined using secondary ion mass spectroscopy (SIMS). In the glass containing only sodium an apparent correlation exists between the alkali diffusion coefficient derived from the leaching kinetics, assuming this process is governed by ion exchange, and that determined via electrical conductivity measurements in the dry glass. In the other two glasses the diffusion coefficients derived on the basis of ion exchange are much higher than the ones found in the dry glasses. These data can be interpreted in terms of a model for the leaching of glass where the rate-determining step is the diffusion of molecular water.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00585747
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