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  • 1
    Electronic Resource
    Electronic Resource
    CORE: a content-based retrieval engine for multimedia information systems (1995)
    Springer
    Multimedia systems 3 (1995), S. 25-41 
    Details
    ISSN: 1432-1882
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Notes: Abstract Rapid advances in multimedia technology necessitate the development of a generic multimedia information system with a powerful retrieval engine for prototyping multimedia applications. We develop a content-based retrieval engine (CORE) that makes use of novel indexing techniques for multimedia object retrieval. We formalize the concepts related to multimedia information systems such as multimedia objects and content-based retrieval. We bring out the requirements and challenges of a multimedia information system. The architecture of CORE is described in detail along with the associated retrieval mechanisms and indexing techniques. Various modules developed for efficient retrieval are presented with some APIs. The efficacy of CORE is demonstrated in the development of two multimedia systems, a computer-aided facial image inference and retrieval (CAFIIR) system and a system for trademark archival and retrieval (STAR), which have been developed at the Institute of Systems Science (ISS). We expect that CORE will be useful for effective prototyping of other such multimedia applications.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01236577
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  • 2
    Electronic Resource
    Electronic Resource
    Mitochondrial myopathy, encephalopathy, lactic acidosis and stroke-like episodes (MELAS) triggered by valproate therapy (1997)
    Springer
    European journal of pediatrics 156 (1997), S. 562-564 
    Details
    ISSN: 1432-1076
    Keywords: Key words Valproate ; Mitochondrial encephalomyopathy ; MELAS syndrome ; Mitochondrial mutation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract We report in this study a patient who developed repeated convulsions as a result of valproate therapy. MELAS (mitochondrial myopathy, encephalopathy, lactic acidosis and stroke-like episodes) was subsequently diagnosed and a nucleotide 3243 A→G mutation was detected in the mitochondrial DNA. This mutation predisposes the patient to the detrimental effects of valproate on oxidative phosphorylation. Conclusion We support the suggestion of Ponchaut et al. [14] that valproate should not be given to patients suspected of having mitochondrial diseases. In addition, for patients whose seizures worsen with valproate therapy, an inborn error of mitochondrial metabolism should be suspected. The underlying mitochondrial DNA defects should be sought for family screening and genetic counselling.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004310050663
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  • 3
    Electronic Resource
    Electronic Resource
    Childhood goitre and urinary iodine excretion in Hong Kong (1997)
    Springer
    European journal of pediatrics 157 (1997), S. 8-12 
    Details
    ISSN: 1432-1076
    Keywords: Key words Childhood ; Goitre ; Urine ; Iodine ; Chinese
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Goitre is common among growing children and adolescents. To define the aetiology of goitre in adolescents of Hong Kong and to examine their current level of iodine intake, this cross-sectional survey of goitre in high school students was performed and urine samples were collected for the analysis of iodine excretion. Screening examinations were carried out in 2439 secondary school students aged 12–18 years from ten randomly selected high schools in Hong Kong. Blood samples were obtained from all goitrous subjects for the determination of serum TSH, free T4 and thyroid antibodies. We obtained 476 random urine samples and 80 24-h urinary collections for the analysis of iodine excretion. Of these, 85 subjects (3.5%) had goitre, 70 had simple goitre. Chronic lymphocytic thyroiditis was found in ten subjects. Two had Graves' disease and three had nodular goitre. The median urinary iodine concentration for the random urine samples was 190 μg/l (1.50 μmol/l) or 158 μg/g creatinine. The median 24-h urinary excretion of iodine was 189 μg (1.49 μmol) per day. Conclusion This cross-sectional study demonstrates the spectrum of thyroid disease in Chinese adolescents in Hong Kong. Their urinary iodine excretion was adequate and much higher than those of children from many European countries and coastal cities of China.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004310050757
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  • 4
    Electronic Resource
    Electronic Resource
    Decomposition of time-ordered products and path-ordered exponentials (1998)
    College Park, Md. : American Institute of Physics (AIP)
    Journal of Mathematical Physics 39 (1998), S. 5543-5558 
    Details
    ISSN: 1089-7658
    Source: AIP Digital Archive
    Topics: Mathematics , Physics
    Notes: We present a decomposition formula for Un, an integral of time-ordered products of operators, in terms of sums of products of the more primitive quantities Cm, which are the integrals of time-ordered commutators of the same operators. The resulting factorization enables a summation over n to be carried out to yield an explicit expression for the time-ordered exponential, an expression which turns out to be an exponential function of Cm. The Campbell–Baker–Hausdorff formula and the non-Abelian eikonal formula obtained previously are both special cases of this result. © 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.532550
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  • 5
    Electronic Resource
    Electronic Resource
    A comparison of colour Doppler sonography and the pelvic arteriogram in assessment of patients with gestational trophoblastic disease (1995)
    Oxford, UK : Blackwell Publishing Ltd
    BJOG 102 (1995), S. 0 
    Details
    ISSN: 1471-0528
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Objective To assess whether colour Doppler sonography can replace pelvic arteriography in the assessment of patients with gestational trophoblastic disease.Design An observational study in which patients with gestational trophoblastic disease were assessed with both pelvic arteriography and colour Doppler sonography.Setting The oncology unit of the Department of Obstetrics and Gynaecology, University of Hong Kong. The unit is the main tertiary referral centre for treatment of trophoblastic diseases in Hong Kong.Subjects Thirty-two consecutive women referred over an 18 month period.Main outcome measures The site of localisation of the tumour and the size of the tumour as assessed by both methods.Results Eleven patients had a spontaneous fall of β-hCGtitres and did not have pelvic arteriograms performed. The remaining 21 patients had both investigations performed. Four patients had no evidence of abnormal pelvic vessels either on colour Doppler sonography or on pelvic arteriography. Their raised P hCG titres were due to metastatic disease elsewhere. In the remaining patients the location of the tumour vessels was found to be concordant between the two methods of imaging. Measurements of the mean diameter of tumour bulk by the two methods also agreed well (r = 0.93, P 〈 0–0001). Pelvic arteriogram over-estimated the size of the tumour in two patients by 2 and 3 cm, respectively, but this did not alter the risk categories of the patients.Conclusion Colour Doppler sonography is a noninvasive technique that can replace pelvic arteriography in the assessment of patients with trophoblastic diseases.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1471-0528.1995.tb11430.x
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  • 6
    Electronic Resource
    Electronic Resource
    Evaluation of multiloop diagrams via lightcone integration (1999)
    College Park, Md. : American Institute of Physics (AIP)
    Journal of Mathematical Physics 40 (1999), S. 5356-5370 
    Details
    ISSN: 1089-7658
    Source: AIP Digital Archive
    Topics: Mathematics , Physics
    Notes: We present a systematic method to determine the dominant regions of internal momenta contributing to any two-body high-energy near-forward scattering diagram. Such a knowledge is used to evaluate leading high-energy dependences of loop diagrams. It also gives a good idea where dominant multiparticle cross sections occur. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.533035
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  • 7
    Electronic Resource
    Electronic Resource
    Low-rate dynamic contact angles on poly(n-butyl methacrylate) and the determination of solid surface tensions (1998)
    Springer
    Colloid & polymer science 276 (1998), S. 459-469 
    Details
    ISSN: 1435-1536
    Keywords: Key words Poly(n-butyl methacrylate)-polymer ; contact angle ; surface tension
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract  Low-rate dynamic contact angles of 22 liquids on a poly(n-butyl methacrylate) (PnBMA) polymer are measured by an automated axisymmetric drop shape analysis-profile (ADSA-P). It is found that 16 liquids yielded non-constant contact angles, and/or dissolved the polymer on contact. From the experimental contact angles of the remaining 6 liquids, it is found that the liquid–vapor surface tension times cosine of the contact angle changes smoothly with the liquid–vapor surface tension, i.e. γlv cos θ depends only on γlv for a given solid surface (or solid surface tension). This contact angle pattern is in harmony with those from other inert and non-inert (polar and non-polar) surfaces [34–37, 45–47]. The solid–vapor surface tension calculated from the equation-of-state approach for solid-liquid interfacial tensions [14] is found to be 28.8 mJ/m2, with a 95% confidence limit of ±0.5 mJ/m2, from the experimental contact angles of the 6 liquids.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003960050267
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  • 8
    Electronic Resource
    Electronic Resource
    How useful is colonoscopy in locating colorectal lesions? (1998)
    Springer
    Surgical endoscopy and other interventional techniques 12 (1998), S. 839-841 
    Details
    ISSN: 1432-2218
    Keywords: Key words: Colonoscopy — Colorectal disease — Diagnostic accuracy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Background: It is important to establish the precise location of a colorectal lesion preoperatively. We used a model based on colorectal cancer to assess the efficacy of colonoscopy in locating these lesions. Methods: We retrospectively analyzed all consecutive new colorectal cancer cases at the Department of Surgery, United Christian Hospital, Hong Kong, in 1995. Results: Of the 123 cases reviewed by us, 84 cases satisfied the analysis criteria. The overall accuracy was 81%. It was especially high in the rectosigmoid region (93%) and descending colon (100%). The overall predictive power was 83%. It was especially high in the right-sided colon (100%) and the rectosigmoid region (93%). Conclusions: We conclude that colonoscopy is an accurate means for locating lesions in the upper rectum and sigmoid colon. It is also very predictive of lesions in the upper rectum, sigmoid colon, and right-sided colon.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004649900725
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  • 9
    Electronic Resource
    Electronic Resource
    An improved procedure for determining oxygen content in high-T ccopper oxides (1996)
    Springer
    Journal of superconductivity 9 (1996), S. 551-554 
    Details
    ISSN: 1572-9605
    Keywords: Iodometric titration ; superconductor ; indicator ; oxygen content
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Notes: Abstract We present an improved double titration method for high-T c superconductors, in which the major step is adding KSCN as an indicator of the end point after the starch end point. By adding it, a greater amount of Na2S2O3 solution can be added after the starch end point, at least 0.12 ml. We found that adding KSCN can lead to precise measuring results and reduce the experimental error. The oxygen contents of two series of superconductors were determined by this approach. For YBa2Cu3O y , the errors are Δp∼0.003 and Δy∼0.005, which are lower than that of other reports.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00723530
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  • 10
    Electronic Resource
    Electronic Resource
    Content-based retrieval for trademark registration (1996)
    Springer
    Multimedia tools and applications 3 (1996), S. 245-267 
    Details
    ISSN: 1573-7721
    Keywords: content-based retrieval ; image database ; trademark registration ; evaluation of content-based retrieval system ; shape features
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Notes: Abstract With ever increasing number of registered trademarks, the task of trademark office is becoming increasingly difficult to ensure the uniqueness of all trademarks registered. Trademarks are complex patterns consisting of various image and text patterns, called device-mark and word-in-mark respectively. Due to the diversity and complexity of image patterns occurring in trademarks, due to multi-lingual word-in-mark, there is no very successful computerized operating trademark registration system. We have tackled key technical issues: multiple feature extraction methods to capture the shape, similarity of multi-lingual word-in-mark, matching device mark interpretation using fuzzy thesaurus, and fusion of multiple feature measures for conflict trademark retrieval. A prototype System for Trademark Archival and Registration (STAR) has been developed. The initial test run has been conducted using 3000 trademarks, and the results have shown satisfaction to trademark officers and specialists.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00393940
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