Sequential order topologies

1990 ◽  
Vol 31 (1) ◽  
pp. 165-168
Author(s):  
S. A. Malyugin
Keyword(s):  
Sequential Order

scholarly journals A Person-to-Person and Person-to-Place COVID-19 Contact Tracing System Based on OGC IndoorGML

2020 ◽  
Vol 10 (1) ◽  
pp. 2 ◽  
Author(s):  
Soroush Ojagh ◽  
Sara Saeedi ◽  
Steve H. L. Liang
Keyword(s):  
Data Model ◽  
Low Cost ◽  
Large Body ◽  
Contact Tracing ◽  
Trajectory Data ◽  
Sequential Order ◽  
Human Contact ◽  
Wide Availability ◽  
Data Points ◽  
The Impact

With the wide availability of low-cost proximity sensors, a large body of research focuses on digital person-to-person contact tracing applications that use proximity sensors. In most contact tracing applications, the impact of SARS-CoV-2 spread through touching contaminated surfaces in enclosed places is overlooked. This study is focused on tracing human contact within indoor places using the open OGC IndoorGML standard. This paper proposes a graph-based data model that considers the semantics of indoor locations, time, and users’ contexts in a hierarchical structure. The functionality of the proposed data model is evaluated for a COVID-19 contact tracing application with scalable system architecture. Indoor trajectory preprocessing is enabled by spatial topology to detect and remove semantically invalid real-world trajectory points. Results show that 91.18% percent of semantically invalid indoor trajectory data points are filtered out. Moreover, indoor trajectory data analysis is innovatively empowered by semantic user contexts (e.g., disinfecting activities) extracted from user profiles. In an enhanced contact tracing scenario, considering the disinfecting activities and sequential order of visiting common places outperformed contact tracing results by filtering out unnecessary potential contacts by 44.98 percent. However, the average execution time of person-to-place contact tracing is increased by 58.3%.

Item Response Biases on the Logical Memory Delayed Recognition Subtest of the Wechsler Memory Scale—III

2000 ◽  
Vol 86 (3) ◽  
pp. 851-857 ◽  
Author(s):  
William D. Scott Killgore ◽  
Lynn Dellapietra
Keyword(s):  
Clinical Sample ◽  
Sequential Order ◽  
Logical Memory ◽  
Wechsler Memory Scale ◽  
Story Content ◽  
Neurological Patients ◽  
Standard Manner ◽  
Similar Content ◽  
Delayed Recognition ◽  
Response Biases

We hypothesized that the wording and sequential order of the WMS–III Logical Memory recognition questions may bias subjects toward correct or incorrect responses on specific items. Therefore, we classified each item according to one of three potential sources of bias (yeasaying to proper names, priming of “yes” responses by previous items with similar content, naysaying to unlikely occurrences) and administered the items to 31 subjects who were completely naïve to the story content. The items predicted to have correct endorsement biases were answered correctly at greater than chance frequencies, while items predicted to be biased toward incorrect answers were missed more frequently than expected by chance. The same sources of bias were tested in an independent clinical sample of 36 neurological patients who were administered the WMS–III in the standard manner. In these patients biases appeared robust enough to be detected in the performances of clinical patients during a neuropsychological evaluation. With further research, such biases may provide avenues for detecting malingerung.

Participant Vocabulary Use and Selection Differences in Serial Versus Parallel Presentation of Product Reaction Cards

2021 ◽  
pp. 106480462110599
Author(s):  
Michelle Spinelli ◽  
Nicholas Kelling ◽  
Mark Morris ◽  
David Neira ◽  
Silvia Convento ◽  
...  
Keyword(s):  
Presentation Modality ◽  
Sequential Order ◽  
Sequential Condition ◽  
Word Selection ◽  
Selection Of

This study looks at the effects on users’ choices when presented with Product Reaction Cards (PRC) in parallel and sequential order. Participants were given brief tasks on two websites and presented with PRC in parallel or sequential order to describe their sentiments. We found that participants selected 25% more words in the sequential condition, including the selection of more positive words (23%). However, the sequential condition took on average 5 minutes longer to complete word selection. Therefore, it is important to understand that the PRC presentation modality can affect the quantity and the choice of vocabulary used by participants.

Reliability modeling of coherent systems with shared components based on sequential order statistics

2018 ◽  
Vol 55 (3) ◽  
pp. 845-861
Author(s):  
S. Ashrafi ◽  
S. Zarezadeh ◽  
M. Asadi
Keyword(s):  
Order Statistics ◽  
Reliability Function ◽  
Failure Model ◽  
Coherent Systems ◽  
Sequential Order ◽  
Birth Process ◽  
Reliability Modeling ◽  
Joint Reliability ◽  
Sequential Order Statistics ◽  
Signature Matrix

Abstract In this paper we are concerned with the reliability properties of two coherent systems having shared components. We assume that the components of the systems are two overlapping subsets of a set of n components with lifetimes X1,...,Xn. Further, we assume that the components of the systems fail according to the model of sequential order statistics (which is equivalent, under some mild conditions, to the failure model corresponding to a nonhomogeneous pure-birth process). The joint reliability function of the system lifetimes is expressed as a mixture of the joint reliability functions of the sequential order statistics, where the mixing probabilities are the bivariate signature matrix associated to the structures of systems. We investigate some stochastic orderings and dependency properties of the system lifetimes. We also study conditions under which the joint reliability function of systems with shared components of order m can be equivalently written as the joint reliability function of systems of order n (n>m). In order to illustrate the results, we provide several examples.

Univariate and multivariate stochastic orderings of residual lifetimes of live components in sequential (𝑛-𝑟+ 1)-out-of-𝑛 systems

2018 ◽  
Vol 55 (3) ◽  
pp. 834-844
Author(s):  
Ghobad Barmalzan ◽  
Abedin Haidari ◽  
Narayanaswamy Balakrishnan
Keyword(s):  
Order Statistics ◽  
Exponential Distribution ◽  
Sufficient Conditions ◽  
Sequential Order ◽  
Stochastic Orderings ◽  
Sequential Order Statistics ◽  
Residual Lifetimes

Abstract Sequential order statistics can be used to describe the ordered lifetimes of components of a system when the failure of a component may affect the reliability of the remaining components. After a reliability system consisting of n components fails, some of its components may still be alive. In this paper we first establish some univariate stochastic orderings and ageing properties of the residual lifetimes of the live components in a sequential (n-r+1)-out-of-n system. We also obtain a characterizing result for the exponential distribution based on uncorrelated residual lifetimes of live components. Finally, we provide some sufficient conditions for comparing vectors of residual lifetimes of the live components from two sequential (n-r+1)-out-of-n systems. The results established here extend some well-known results in the literature.

Retention of Bilateral Performance as a Function of Practice Order

1978 ◽  
Vol 46 (1) ◽  
pp. 43-46 ◽  
Author(s):  
Paul Dunham
Keyword(s):  
Analysis Of Variance ◽  
Repeated Measures ◽  
Rotation Speed ◽  
Sequential Order ◽  
Rotary Pursuit

The purpose of this study was to investigate the effect of practice order and initial performance hand on the bilateral retention of a simple tracking skill for 44 undergraduate volunteers. The apparatus was a Lafayette Model 30014 photoelectric rotary pursuit. The circle template was employed with rotation speed set at 20 rpm. Subjects were given 20-sec. trials and required to reach a criterion of 70% time on target twice in succession with both hands. For original practice, subjects were randomly assigned to one of four practice groups: preferred serial, non-preferred serial, preferred sequence and non-preferred sequence. Subjects' performance was recorded as the number of trials required to achieve criterion for both hands. One month later subjects were retested and scored in the same manner. A 2 × 2 × 2 analysis of variance with repeated measures on the last factor was used to determine the effects of initial hand, order of practice, testing periods, and the appropriate interactions. The results indicated that subjects' performance for the two testing periods differed significantly; retest was superior. Order of practice was significant and the sequential order more efficient during both learning and retest.

scholarly journals Psychological Pressure in Competitive Environments: Evidence from a Randomized Natural Experiment

2010 ◽  
Vol 100 (5) ◽  
pp. 2548-2564 ◽  
Author(s):  
Jose Apesteguia ◽  
Ignacio Palacios-Huerta
Keyword(s):  
Natural Experiment ◽  
Psychological Effects ◽  
Control Groups ◽  
Sequential Order ◽  
Socioeconomic Outcomes ◽  
Competitive Environments ◽  
First Mover Advantage ◽  
Psychological Pressure ◽  
And Control ◽  
First Mover

Emotions can have important effects on performance and socioeconomic outcomes. We study a natural experiment where two teams of professionals compete in a tournament taking turns in a sequence. As the sequential order is determined by the random outcome of a coin flip, the treatment and control groups are determined via explicit randomization. Hence, absent any psychological effects, both teams should have the same probability of winning. Yet, we find a systematic first-mover advantage. Further, professionals are self-aware of their own psychological effects and, when given the chance, they rationally react by systematically taking advantage of these effects. (JEL C93, D03, D82, L83)

scholarly journals A conserved rRNA switch is central to decoding site maturation on the small ribosomal subunit

2020 ◽  
Author(s):  
Andreas Schedlbauer ◽  
Idoia Iturrioz ◽  
Borja Ochoa-Lizarralde ◽  
Tammo Diercks ◽  
Jorge Pedro López-Alonso ◽  
...  
Keyword(s):  
Molecular Mechanisms ◽  
Structural Information ◽  
Ribosomal Subunit ◽  
Ribosome Assembly ◽  
Structural Description ◽  
Sequential Order ◽  
Bacterial Ribosome ◽  
Core Set ◽  
Assembly Factors ◽  
Conformational Landscape

While a structural description of the molecular mechanisms guiding ribosome assembly in eukaryotic systems is emerging, bacteria employ an unrelated core set of assembly factors for which high-resolution structural information is still missing. To address this, we used single-particle cryo-EM to visualize the effects of bacterial ribosome assembly factors RimP, RbfA, RsmA, and RsgA on the conformational landscape of the 30S ribosomal subunit and obtained eight snapshots representing late steps in the folding of the decoding center. Analysis of these structures identifies a conserved secondary structure switch in the 16S rRNA central to decoding site maturation, and suggests both a sequential order of action and molecular mechanisms for the assembly factors in coordinating and controlling this switch. Structural and mechanistic parallels between bacterial and eukaryotic systems indicate common folding features inherent to all ribosomes.

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