Analysis and design of multi-input-multi-priority buffering systems with binomial feedback     

S.G. Tzafestas 《Journal of The Franklin Institute》1976,302(1):19-36

The buffer design problem is studied for the cases where there exist single- and multiple-input lines with Poisson or Poisson bursts arrivals, periodic block or batch type removals, and binomial feedback.Using traffic intensity σ, block size c, and the feedback probability P_a as parameters, the analytical expressions concerning the average fractional information loss, the channel utilization and the average buffering delay in relation to the buffer length are derived. These relationships are computed for a set of parameter values and are plotted to be used as a basis for the buffer design. The present study should be valuable in designing engineering systems such as time sharing computer systems, information compression systems, computer networks, road traffic simulators, telephone exchanges etc. An illustrative example of a single-input buffer system of the type considered is fully discussed.  相似文献   

Microscopic haematuria as an occult filarial infection in bhubaneshwar an endemic area for bancroftian filariasis     

R. Alli  B. Bhunia  G. P. Chhotray  M. V. R. Reddy  B. C. Harinath 《Indian journal of clinical biochemistry : IJCB》2003,18(1):61-64

Sera samples of 7 microscopic haematuria cases collected before and after treatment with Diethylcarbamazine citrate, (DEC), 9 microfilaraemic cases and 19 endemic normal individuals were analysed for filarial antigen and IgG antibody levels. Filarial antigen was detected in 5 of the 7 microscopic haematuria cases, of which 3 turned negative for antigen after treatment with DEC. While none of the 7 haematuria cases were positive for filarial IgG antibodies, before the DEC treatment, all of them turned positive after DEC treatment. The sensitivity and specificity values(to detect mf +ve cases) were 89% and 90% respectively for the detection of filarial antigen and 78% and 95% respectively for the detection of filarial IgG antibodies.  相似文献   

An isoperimetric problem for continuous systems: The aeolian vibration of a conductor span     

M.G. Marieta 《Journal of The Franklin Institute》1976,301(4):317-333

The equations of motion for perfectly mechanical systems which are restricted to satisfy given constraints are derived through the Lagrangian formulation for continuous media. Hamilton's equations for this situation are derived, and the equations for the balance of energy and angular momentum are generated from fundamental principles. These equations are all specialized to the example of a conductor which is vibrating under Aeolian excitation. Various models for the Hamiltonian density and the constraint energy density due to the wind energy input are also discussed.  相似文献   

The computation of discrimination values     

Robert G. Crawford 《Information processing & management》1975,11(8-12)

Results have been reported showing the usefulness of discrimination value in automatic construction of dictionaries for information retrieval. While discrimination value is defined in the literature, no specific explanation of its computation is given. In this paper the computation of discrimination value is discussed, a relatively efficient algorithm is presented and an example is given.  相似文献   

Smooth-pursuit eye movements in the newborn infant.     

J P Kremenitzer  H G Vaughan  D Kurtzberg  K Dowling 《Child development》1979,50(2):442-448

The capacity of newborn infants to smooth-pursuit eye movements in single-target tracking and in optokinetic nystagmus to a moving striped field was examined utilizing DC electrooculography. Smooth-pursuit movements were observed in all infants who were alert during testing, but they occupied less than 15% of viewing time during single-target tracking. The velocity of smooth-pursuit segments in single-target tracking increased linearly to a target velocity of 19 degrees/sec and deteriorated rapidly at faster speeds. No smooth pursuit occurred above 32 degrees/sec in single-target tracking. By contrast, optokinetic nystagmus was observed at all field velocities to 40 degrees/sec, but the speed of the mean slow component increased linearly to 25 degrees/sec and diminished above that field velocity. Infant optokinetic nystagmus differed strikingly from that of adults in that tonic ocular deviation was in the direction of field movement rather than away from it. This feature of neonatal optokinetic nystagmus is consistent with deficient foveal function and suggests that the relatively poor smooth-pursuit performance of newborns may be related to foveal immaturity.  相似文献   

Do Fourteenth Amendment considerations outweigh a potential state interest in mandating cochlear implantation for deaf children?     

Bender DG 《Journal of deaf studies and deaf education》2004,9(1):104-111

Currently, the decision concerning pediatric cochlear implantation for children remains a personal choice for parents to make. Economic factors, educational outcomes, and societal attitudes concerning deafness could result in an increased governmental interest in this choice. This article examines case law related to the issue of parental autonomy to determine whether the state, acting in the role of parens patriae, could use economic and social reasons to mandate the provision of cochlear implants for all eligible children. The author uses previous cases as a framework to develop an opinion on whether a constitutional protection for parents may exist.  相似文献   

Spatial invariance of handwriting     

Robert R. A. van Doorn  Paul J. G. Keuss 《Reading and writing》1993,5(3):281-296

Two aspects concerning the production of shapes in handwriting are distinguished in the present paper. The first aspect is indicated by thespatial variability of letters measured across replications. Spatial variability is assumed to reflect the basic spatial noise observed in everyday writing. The second aspect deals with the geometric characteristics of letter shapes, measured by the ratio of the vertical over the horizontal letter size (Y/X-ratio). The main question is whether the geometric characteristics and basic spatial noise originate from a common source. More specifically, we are interested in whether Y/X-ratio as well as spatial variability will alter across changed circumstances, or whether Y/X-ratio will alter without a change in spatial variability. Subjects wrote the simple letter sequencelelele in conditions with and without vision under three scaling conditions requirements (small, normal and large letter sizes). The main results were that geometric aspects of letters altered (Y/X-ratio) under no vision and under the scaling requirement to write in a small format. In contrast, shapes were produced with unchanged spatial variability in all conditions of vision and scaling requirements. The results suggest that alterations of geometric aspects of letters across changed circumstances do not necessarily involve an increase in spatial variability.  相似文献   

Differences and similarities between violent offenders and sex offenders     

Gudjonsson GH  Sigurdsson JF 《Child abuse & neglect》2000,24(3):363-372

OBJECTIVES: To investigate differences and similarities between violent offenders and two types of sex offenders, rapists and child molesters, in terms of their personality, the nature of the victim, the role of alcohol, and their confession to their crime. METHOD: Thirty-six adult sex offenders, 23 child molesters, and 32 violent offenders were compared on personality measures, their relationship with the victim, the presence of alcohol intoxication, their confession rate and retraction at trial, and the reasons they gave for having confessed to the police. RESULTS: Child molesters and adult sex offenders (rapists) were significantly more introverted than the violent offenders. The child molesters had higher social desirability scores than the other groups, they tended to assault relatives and friends, they were rarely intoxicated while committing the offense, and they had strong internal need to confess to the police. Rapists and violent offenders were more commonly intoxicated during the commission of the offense; the former tended to assault acquaintances, where violent offenders most commonly assaulted strangers. Exactly half of the rapists retracted their confession when the case went to trial; in contrast none of the other offenders retracted their confession. CONCLUSIONS: The results show that there are significant differences as well as similarities between the three groups of offenders, which have implications for assessment and treatment.  相似文献   

Naming-speed processes, timing, and reading: a conceptual review     

Wolf M  Bowers PG  Biddle K 《Journal of learning disabilities》2000,33(4):387-407

This article integrates the findings in the special issue with a comprehensive review of the evidence for seven central questions about the role of naming-speed deficits in developmental reading disabilities. Cross-sectional, longitudinal, and cross-linguistic research on naming-speed processes, timing processes, and reading is presented. An evolving model of visual naming illustrates areas of difference and areas of overlap between naming speed and phonology in their underlying requirements. Work in the cognitive neurosciences is used to explore two nonexclusive hypotheses about the putative links between naming speed and reading processes and about the sources of disruption that may cause subtypes of reading disabilities predicted by the double-deficit hypothesis. Finally, the implications of the work in this special issue for diagnosis and intervention are elaborated.  相似文献   

What is Accrediting and Why is it Important for Professional Organizations?     

Frank G. Dickey 《Counselor Education & Supervision》1968,7(4):193-199

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