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  • 1993  (139)
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  • 1993  (139)
  • 1
    Article
    Article
    In: Journal of Property Management, Jan-Feb, 1993, Vol.58(1), p.40(4)
    Description: Retailers face major problems due to the increased construction of retail stores and changes in consumers' spending habits. Local governments and municipalities have encouraged retail expansion through tax subsidies because of the revenues retail sales taxes provide. However, demographic factors are changing retail demand and consumer preferences. The dwindling population of the middle class since the 1970s, coupled with the recession which reduced incomes in 1991 has resulted in less buying. In addition, the aging American population is expected to result in older and more practical shoppers. Retailers must begin adapting to the new kind of consumers in order to remain competitive. They can begin by offering the best of either merchandise, price or service. They can also consider replacing their traditional department store anchors.
    Keywords: Retail Trade -- Economic Aspects ; Consumer Behavior -- Evaluation
    ISSN: 0022-3905
    Source: Cengage Learning, Inc.
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  • 2
    In: Nature, 1993, Vol.363(6425), p.144
    Description: The Ulysses mission detected quasi-periodic streams of high-velocity submicron-sized dust particles during its encounter with Jupiter. It is shown here how the dust events could result from the acceleration and subsequent ejection of small grains by Jupiter's magnetosphere. Dust grains entering the plasma environment of the magnetosphere become charged, with the result that their motion is then determined by both electromagnetic and gravitational forces. This process is modeled, and it is found that only those particles in a certain size range gain sufficient energy to escape the Jovian system. Moreover, if Io is assumed to be the source of the dust grains, its location in geographic and geomagnetic coordinates determines the exit direction of the escaping particles, providing a possible explanation for the observed periodicities. The calculated mass and velocity range of the escaping dust gains are consistent with the Ulysses findings. (AIAA)
    Keywords: Cosmic Dust ; Ejection ; Jupiter (Planet) ; Particle Acceleration ; Planetary Magnetospheres ; Particle Trajectories ; Ulysses Mission ; Lunar And Planetary Exploration (Ah) ; Article;
    ISSN: 0028-0836
    E-ISSN: 1476-4687
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  • 3
    In: Advertising Age, Dec 13, 1993, Vol.64(52), p.32(1)
    Description: Advertiser-produced television programs first appeared in 1949, but television networks eventually took over most programs' production. Procter & Gamble has show, however, that advertiser-produced shows can still be successful. The company produces three parenting programs for the Lifetime cable-television network. A checklist of alternative-programming development criteria is included.
    Keywords: Television Production Companies -- Innovations ; Television Advertising -- Innovations ; Advertising Agencies -- Innovations ; Cleaning Agents Industry ; Cable Television Production ; Procter & Gamble Co.
    ISSN: 0001-8899
    Source: Cengage Learning, Inc.
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  • 4
    In: Nature, 1993, Vol.363(6426), p.252
    Description: The nature of the relationship between Neanderthals and early modern Homo sapiens is controversial, yet it is fundamental to our understanding of early human evolution. The Middle Palaeolithic sites of Israel are critical to this debate, because unlike those of western Europe and Africa they contain both Neanderthal (at Tabun and Kebara for example) and anatomically modern hominids (as at Skhul and Qafzeh). Here we present new mass spectrometric 230Th/234U dates for dental fragments from the Middle Palaeolithic burial sites of Tabun, Qafzeh and Skhul. These data, combined with published ages from electron spin resonance (ESR), provide compelling evidence that the Tabun Neanderthals and Qafzeh early modern Homo sapiens were approximately coeval in the southern Levant some 100 +/- 5 kyr ago, but indicate that some of the Skhul material is younger. The study also shows that combined mass-spectrometric 230Th/234U and ESR dating is an invaluable technique for dating archaeological sites beyond the range of radiocarbon dating.
    Keywords: Animals–Chemistry ; Biological Evolution–Chemistry ; Dental Enamel–Chemistry ; Dentin–Chemistry ; Electron Spin Resonance Spectroscopy–Chemistry ; Fossils–Chemistry ; Hominidae–Chemistry ; Humans–Chemistry ; Israel–Chemistry ; Mass Spectrometry–Chemistry ; Women ; Men ; Evolution ; Archaeology;
    ISSN: 0028-0836
    E-ISSN: 1476-4687
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  • 5
    In: Nature, 1993, Vol.366(6454), p.415
    Keywords: Fossils ; Hominidae;
    ISSN: 0028-0836
    E-ISSN: 1476-4687
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  • 6
    Language: English
    In: Surface & Coatings Technology, 1993, Vol.60(1), pp.613-618
    Description: For new developments such as plasma surface technologies, it is first necessary to prove their scientific possibilities and limits. Therefore it is mainly questions of process understanding and process handling, quality of the substrate and coating as well as its interactions which are considered and discussed. To use these technologies in industry it is also necessary to consider ecological aspects as well as economic and marketing aspects. For a scientist at first these aspects are not as important. An overview of different economic aspects of the application of plasma surface technologies is presented by considering the following: investment and running costs of plants; costs of process development for special applications; comparison of different technologies; certainty and reproducibility of the coating technologies; cost and profit balance of coated work pieces; costs of marketing. Recently, the importance of the ecological aspects of industrial technologies has increased greatly. In most cases these questions are closely linked to the economic aspects. Nearly all ecological problems can be solved and handled, but the costs for this are increasing greatly. Although the laws currently differ in different countries, in future the laws everywhere will become more strict. The main concerns of the application and handling of a plasma assisted process are for example the use or production of toxic media, security of plants for the staff and for the environment, and handling of used coated material.
    Keywords: Engineering ; Chemistry
    ISSN: 0257-8972
    E-ISSN: 1879-3347
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  • 7
    Language: English
    In: Proceedings of the National Academy of Sciences of the United States of America; (United States), 15 May 1993, Vol.90:10
    Description: The authors have developed a method for generating expressed-sequence maps of human chromosomes. The method involves several steps that begin with libraries of highly representative short cDNAs prepared by using random oligomers as primers. The cDNA inserts are amplified by PCR with flanking vector primers. Chromosomal region-specific cDNA packets are prepared by hybridization of the cDNA inserts to DNA derived from yeast artificial chromosomes (YACs) assigned to defined regions of human chromosomes. The cDNA packets are cloned into yeast chromosome fragmentation vectors and used for transformation of yeast bearing the YAC used for affinity purification. Sequences in the cDNAs undergo homologous recombination with the corresponding exons in the genomic DNA yielding a set of truncated YACs. Each unique truncation specifies the location of an exon in the YAC. Since all of the truncation events end with the same vector sequence, it is possible to rescue and sequence these ends to generate expressed sequence tags. The method couples rapid purification of region-specific cDNAs with precise mapping of their genes on YACs. Appropriately truncated YACs also provide easy access to gene regulatory sequences. The authors describe the feasibility of individual steps of the method using the factor IX (F9) gene as a model system and they present the mapping of several expressed sequences corresponding to a 330-kb YAC containing DNA from human chromosome 6p21. In addition, they obtained the sequence, including an intron-exon junction, flanking a particular truncation event. 24 refs., 5 figs., 1 tab.
    Keywords: Basic Biological Sciences ; Human Chromosomes ; Genetic Mapping ; DNA ; DNA Sequencing ; DNA-Cloning ; Fragmentation ; Genes ; Chromosomes ; Cloning ; DNA Hybridization ; Hybridization ; Mapping ; Nucleic Acids ; Organic Compounds ; Structural Chemical Analysis ; 550400 - Genetics ; Sciences (General)
    ISSN: 0027-8424
    E-ISSN: 1091-6490
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  • 8
    Language: English
    In: The Journal of Trauma: Injury, Infection, and Critical Care, 1993, Vol.35(1), p.163
    ISSN: 0022-5282
    Source: Wolters Kluwer - Ovid - Lippincott Williams & Wilkins (via CrossRef)
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  • 9
    Language: English
    In: Applied Physics Letters, 22 November 1993, Vol.63(21), pp.2947-2948
    Description: High‐resolution electron microscopy of wurtzite type CdSe epilayers grown on (111) GaAs revealed that interfacial misfit dislocations are perfect 60° dislocations with Burgers vectors parallel to the interface. Glide is therefore limited to the (0001) interface plane and the extension of dislocations into the epilayer is suppressed. Single‐beam bright field imaging shows that the 7% mismatched epilayer is free of a dislocation network in its volume.
    ISSN: 0003-6951
    E-ISSN: 1077-3118
    Source: © 1993 American Institute of Physics (AIP)〈img src=http://exlibris-pub.s3.amazonaws.com/AIP_edited.gif style="vertical-align:middle;margin-left:7px"〉
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  • 10
    Language: English
    In: The American journal of psychiatry, June 1993, Vol.150(6), pp.972-4
    Description: Test-retest interviews examining recent sexual activity were administered to 27 severely ill psychiatric patients after stabilization. Three reports were judged to be questionable. For the 16 sexually active patients among the remaining 24, high test-retest reliability was found for number of sexual partners, frequency of episodes, and proportions of episodes involving vaginal intercourse and use of condoms. The interviews did not exacerbate psychiatric symptoms.
    Keywords: Risk-Taking ; Sexual Behavior ; Acquired Immunodeficiency Syndrome -- Transmission ; Mental Disorders -- Diagnosis ; Psychiatric Status Rating Scales -- Standards
    ISSN: 0002-953X
    E-ISSN: 15357228
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