Estimation of critical gaps and follow-up times at median uncontrolled T-intersection

2021 ◽  
Vol 60 (4) ◽  
pp. 105-124
Author(s):  
Renata Żochowska ◽  
Adrian Barchański
Keyword(s):  
Limited Extent ◽  
Street Network ◽  
Pilot Studies ◽  
Current Form ◽  
The Road ◽  
Different Types ◽  
The Individual ◽  
The Given ◽  
Point Type

The efficiency of the entire transportation system depends on the capacity of the individual elements that make up the given network. Point-type elements of the road and street network include intersections of different types. Critical gaps and follow-up times related to individual movements are important determinants of the capacity of such objects. There are many ways to estimate such times. The article discusses the assumptions and scheme one of them - the Siegloch method. The objective of the article is to analyze the process of determining critical gaps and follow-up times at the median uncontrolled T-intersections that are rare in the road and street network and have been studied to a limited extent. The commonly used HCM, HBS, and Polish (MOP SBS) methods in their current form do not consider the speci-ficity of such intersections and thus may not give reliable results. Due to their characteristics in terms of geometry conditions, there is a need for an individual approach to estimate both critical gaps and follow-up times. The article contains the results of empirical research conducted on a selected real object in the Upper Silesian agglomeration in Poland. The intersection under study is located in one of the central districts of Katowice city, in the built-up area serving commercial and service functions. The analysis of the behavior of individual drivers waiting for the possibility to continue driving was conducted separately for each minor traffic movement. The values of critical gaps and follow-up times were determined for all four subordinate movements. The values obtained are different from those contained in the Polish manual, which is recommended for use. The research should be considered as pilot studies that justify the need to develop a separate approach to the estimation of the critical gaps and follow-up times at median uncontrolled T-intersections.

A study on orthodontic retention practices in Nepal

2021 ◽  
Vol 11 (1) ◽  
pp. 29-33
Author(s):  
Anjana Karmacharya ◽  
Dashrath Kafle ◽  
Ram Bhakta Adhikari ◽  
Nirjalla Malla
Keyword(s):  
Social Sciences ◽  
Background Information ◽  
Specific Situation ◽  
Multiple Choice Questions ◽  
Short Answer ◽  
Different Types ◽  
The Individual ◽  
Retention Practices ◽  
Survey Questionnaires

Introduction: Retainers are used after all orthodontic treatment, to prevent or minimize relapse and recurrence. Among various retainers used, Hawley retainer and ‘invisible’ retainers are the most common. Most of the orthodontists favored permanent retention. It is obvious that the retention procedures are variable and depended largely on personal preferences, and there does not seem to be any consistent pattern in the application of retention methodologies. The  purpose of this study was to survey the retention protocols among orthodontists in Nepal. Materials and Method: The complete lists of the names and addresses of orthodontists in Nepal was obtained from the ODOAN. The questionnaire was sent to them which consisted of multiple-choice questions and short answer, related to background information of the individual orthodontist, retention use in general, the frequency of different types of bonded or removable retainers that are used, the retention protocol, the type of retainer used in specific situation. All statistical analyses were performed using the Statistical Package for Social Sciences (SPSS), version 12.0.1 (SPSS Inc, Chicago, Illinois, USA) Result: The survey questionnaires were completed by 90.42% of the 94 orthodontists of Nepal, 58.8% males and 41.2% females with a mean age of 36.7 years. Most of the orthodontists used a clear (vacuum) retainer (80%) in the maxilla and fixed bonded retainer in the mandible. Most of them prefer the use of retainer for a continuous 24 hours except during eating and brushing for 6 months to 1 year (56.5%) and if possible, for 1 to 2 years (28.2%). Conclusion: Majority of Nepalese orthodontists provide vacuum formed retainer on maxillary arch and bonded retainer in mandibular arch. There is no specific consensus on other type of retainers, duration of wear and follow up visits which is affected by various other factors.

OTL-PEM: an optimization-based two-layer pointwise ensemble of surrogate models

2021 ◽  
pp. 1-30
Author(s):  
Yong Pang ◽  
Yitang Wang ◽  
Wei Sun ◽  
Xueguan Song
Keyword(s):  
Cross Validation ◽  
Optimization Problems ◽  
Surrogate Models ◽  
Negative Influence ◽  
Test Functions ◽  
Different Types ◽  
Poor Individual ◽  
The Individual ◽  
The Given ◽  
Model Selection Problem

Abstract The ensemble of surrogate models is increasingly implemented in practice for its more flexibility and robustness compared to the individual surrogate models. In this work, a novel pointwise ensemble of surrogate models named the optimization-based two-layer pointwise ensemble of surrogate model (OTL-PEM) is proposed. In the OTL-PEM, the framework of two-layer surrogate models is defined, where the data-surrogate models containing different types of individual surrogate models are to fit the given dataset, while the weight-surrogate models are modeled based on the cross-validation errors aiming to fit the pointwise weights of different individual surrogate models. To avoid the negative influence of the poor individual surrogate models, the model selection problem is transformed into several optimization problems which can be solved easily by the mature optimization algorithm to eliminate the globally poor surrogate models. In addition, the optimization space is extracted to alleviating the predictive instability caused by the extrapolation of the weight-surrogate models. Forty test functions are used to select the appropriate hyperparameters of the OTL-PEM, and to evaluate the performance of the OTL-PEM. The results indicate that the OTL-PEM can provide more accurate and robust approximation performance compared with individual surrogate models as well as other ensembles of surrogate models.

The Traffic Systems of Pompeii

2017 ◽  
Author(s):  
Eric E. Poehler
Keyword(s):  
Roman Empire ◽  
Urban Culture ◽  
Social Forces ◽  
Street Network ◽  
Stepping Stones ◽  
Traffic System ◽  
The Road ◽  
Traffic Systems ◽  
The Individual

The Traffic Systems of Pompeii is the first sustained examination of the evidence for a regulated circulation of wheeled traffic in the ancient world. The setting to this system is the six-hundred-year evolution of Pompeii’s street network, the focus of which telescopes from the city’s urban grid to the shape of the streets, the treatment of their surfaces, and finally the individual elements of construction—the curbstones, stepping stones, and guard stones—where the evidence for traffic was inscribed. Although ruts are the most evocative evidence of ancient traffic, it is the wearing patterns on the vertical faces of street features that permit the determination of the directions that ancient carts were traveling and undergird the argument for their systematic regulation. Distilled from over five hundred locations recording multiple categories of evidence, all wholly new to archaeology and unique to this research, this book reveals the basic rules of the road and at the same time opens larger historical questions. What does the existence of a traffic system mean for our understanding of ancient urbanism? What other social forces are uncovered in the search for it? To explore these questions, the traffic system at Pompeii is set in its broader contexts as one infrastructural and administrative artifact of the Roman empire, an epiphenomenon of a deeply urban culture.

What did the Future hold for them? Different Types of Foreshadowing in Various Saga Genres

2017 ◽  
Vol 47 (1) ◽  
Author(s):  
Kristýna Králová
Keyword(s):  
Geographical Range ◽  
Old Norse ◽  
Different Types ◽  
The Future ◽  
The Individual ◽  
The Given ◽  
Subsequent Comparison

AbstractThe aim of this article is to show that foreshadowing in various types of Old Norse saga differs in both content and form. In the individual chapters typical features of foreshadowing in family, king’s and legendary sagas are described. These features are shown through the following categories: the form in which the given foreshadowing occurs (a dream, premonition, curse, etc.), the content of the given foreshadowing, the time extent of the foreshadowing (how far into the future the given foreshadowing extends) and geographical range (to what places the given foreshadowing is bound). The subsequent comparison of foreshadowing in various saga genres reveals great differences between these four categories. In the article’s conclusion, possible causes of these differences are suggested.

AAC Supports for Individuals With Rett Syndrome Across the Lifespan

2015 ◽  
Vol 24 (3) ◽  
pp. 74-85
Author(s):  
Sandra M. Grether
Keyword(s):  
Rett Syndrome ◽  
Communication Skills ◽  
Preliminary Analysis ◽  
Multidisciplinary Approach ◽  
Motor Deficits ◽  
Complex Profile ◽  
Communication Behaviors ◽  
The Individual

Individuals with Rett syndrome (RS) present with a complex profile. They benefit from a multidisciplinary approach for diagnosis, treatment, and follow-up. In our clinic, the Communication Matrix © (Rowland, 1990/1996/2004) is used to collect data about the communication skills and modalities used by those with RS across the lifespan. Preliminary analysis of this data supports the expected changes in communication behaviors as the individual with RS ages and motor deficits have a greater impact.

Embodied displacements in young German children’s storytelling

2019 ◽  
Vol 3 (1-2) ◽  
pp. 168-195 ◽  
Author(s):  
Vivien Heller
Keyword(s):  
Picture Book ◽  
Book Reading ◽  
Lexical Resources ◽  
Narrative Space ◽  
Multimodal Analysis ◽  
Different Types ◽  
German Speaking ◽  
Picture Book Reading ◽  
The Given

This paper is concerned with embodied processes of joint imagination in young children’s narrative interactions. Based on Karl Bühler’s notion of ‘deixis in the imagination’, it examines in detail how a 19-month-old German-speaking child, engaged in picture book reading with his mother, brings about different subtypes of deixis in the imagination by either ‘displacing’ what is absent into the given order of perception (e.g. by using the hand as a token for an object) or displacing his origo to an imagined space (e.g. by kinaesthetically aligning his body with an imagined body and animating his movements). Drawing on multimodal analysis and the concept of layering in interaction, the study analyses the ways in which the picture book as well as deictic, depictive, vocal and lexical resources are coordinated to evoke a narrative space, co-enact the storybook character’s experiences and produce reciprocal affect displays. Findings demonstrate that different types of displacement are in play quite early in childhood; displacements in the dimension of space and person are produced through layerings of spaces, voices and bodies.

Application of the turbidity ratio method in the spherical particle size determination in the range m ∈ and α ∈

1979 ◽  
Vol 44 (7) ◽  
pp. 2064-2078 ◽  
Author(s):  
Blahoslav Sedláček ◽  
Břetislav Verner ◽  
Miroslav Bárta ◽  
Karel Zimmermann
Keyword(s):  
Refractive Index ◽  
Spherical Particle ◽  
Ratio Method ◽  
Refractive Indices ◽  
Relative Refractive Index ◽  
Particle Size Determination ◽  
The Individual ◽  
The Given ◽  
Turbidity Ratio ◽  
Selection Of

Basic scattering functions were used in a novel calculation of the turbidity ratios for particles having the relative refractive index m = 1.001, 1.005 (0.005) 1.315 and the size α = 0.05 (0.05) 6.00 (0.10) 15.00 (0.50) 70.00 (1.00) 100, where α = πL/λ, L is the diameter of the spherical particle, λ = Λ/μ1 is the wavelength of light in a medium with the refractive index μ1 and Λ is the wavelength of light in vacuo. The data are tabulated for the wavelength λ = 546.1/μw = 409.357 nm, where μw is the refractive index of water. A procedure has been suggested how to extend the applicability of Tables to various refractive indices of the medium and to various turbidity ratios τa/τb obtained with the individual pairs of wavelengths λa and λb. The selection of these pairs is bound to the sequence condition λa = λ0χa and λb = λ0χb, in which b-a = δ = 1, 2, 3; a = -2, -1, 0, 1, 2, ..., b = a + δ = -1, 0, 1, 2, ...; λ0 = λa=0 = 326.675 nm; χ = 546.1 : 435.8 = 1.2531 is the quotient of the given sequence.

NGOs

2018 ◽  
Author(s):  
Patrick Mutzenberg
Keyword(s):  
Human Rights ◽  
Cultural Rights ◽  
National Implementation ◽  
The Individual ◽  
Oral Information

This chapter evaluates the role played by NGOs before the Committee on Economic, Social and Cultural Rights and the Human Rights Committee. Even if NGO participation was not originally foreseen in the Covenants, clear proceedings have subsequently been established to ensure their involvement in the Committees’ work. This chapter’s main focus is on the reporting procedure: it assesses how NGOs can submit written and oral information to strengthen this process. It also briefly addresses the NGO role in other areas of the Committees’ work, in particular the drafting of General Comments and the individual communications mechanisms. However, NGO participation is not limited to the work carried out in Geneva, and the chapter highlights recent NGO initiatives to ensure proper national implementation of the Committees’ recommendations. Such engagement is also possible in the context of the follow-up procedures, albeit to different extents depending on the practices of the respective Committee.

Characteristics of Different Types of Childhood Violence and the Risk of Revictimization

2019 ◽  
Vol 25 (14) ◽  
pp. 1696-1716 ◽  
Author(s):  
Ida Frugaard Stroem ◽  
Helene Flood Aakvaag ◽  
Tore Wentzel-Larsen
Keyword(s):  
Childhood Abuse ◽  
Telephone Survey ◽  
Regression Analyses ◽  
Multiple Forms ◽  
Different Types ◽  
Children And Young Adults ◽  
Childhood Violence ◽  
Forms Of Violence ◽  
The Relationship

This study investigates the relationship between the characteristics of different types of childhood violence and adult victimization using two waves of data from a community telephone survey (T1) and a follow-up survey, including 505 cases and 506 controls, aged 17-35 years (T2). The logistic regression analyses showed that exposure to childhood abuse, regardless of type, was associated with adult victimization. Exposure to multiple types of abuse, victimization both in childhood and in young adulthood, and recency of abuse increased these odds. Our findings emphasize the importance of assessing multiple forms of violence when studying revictimization. Practitioners working with children and young adults should be attentive to the number of victimization types experienced and recent victimization to prevent further abuse.

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