scholarly journals Methodologies to Predict Service Lives of Pavement Marking Materials

Author(s):  
Yunlong Zhang ◽  
Dongfeng Wu

This study focuses on developing methodologies to predict the service life of a pavement marking material based on its retroreflectivity. Data from the 2002 National Transportation Product Evaluation Program (NTPEP) pavement marking material test deck in Mississippi are used for model development and model validation. The smoothing spline method and time series modeling are applied to estimate the service lives of different types of materials based on the assumption of a required minimum retroreflectivity value. The same models can also predict the retroreflectivity values at future times for a pavement marking product based on its retroreflectivity values in the past. The validation of the models shows satisfactory accuracy. As demonstrated in a case study, the predicted service lives of the marking materials can be used in life-cycle cost comparisons for selecting pavement marking material.

2018 ◽  
Author(s):  
Karel Van Nieuwenhuyse

Torn between patriotic, civic and disciplinary aspirations. Evolving faces of Belgian and Flemish history education, from 1830 to the futureHistory education worldwide faces competing, rival visions and even contrasting expectations. Those expectations can be clustered in three main groups, each pursuing a different main goal for and a different approach towards studying the past: ‘nation-building and social cohesion’, ‘democratic participation and civic behavior’, and ‘disciplinary understanding’. This contribution examines how secondary school history education in Belgium (since its establishment in 1830) has been given shape, and how its main goals have evolved. Belgium (and later on Flanders) serves as an interesting case study, as the country testifies to a difficult, contested past, has evolved into a nation-state in decline, and is increasingly characterized by intercontinental immigration. Using the three clusters of rival expectations as an analytical framework, it is analyzed what the consecutive main goals for the school subject of history have been, which changes occurred throughout the past two centuries and why, and what have been the effects of these different types of history education on young people. The analysis allows to discern three main stages in the history of history education in Belgium/Flanders. For all three, the main goals are explained, and their effects examined. This contribution concludes with critically discussing the different aims, and, while reporting on the current reform of the school subject of history in Flanders, setting a fourth aim to the fore. Rozziew pomiędzy aspiracjami patriotycznymi, obywatelskimi i zrozumieniem dyscypliny. Ewolucja oblicza nauczania historii w szkołach Belgii i Flandrii od 1830 roku i jego przyszłośćNa całym świecie nauczanie historii napotyka konkurujące i rywalizujące ze sobą wyobrażenia, a nawet rodzi sprzeczne oczekiwania. Oczekiwania owe można ująć w trzy kompleksy zasadniczych zagadnień, przy czym każdy z nich ma inny główny cel studiowania przeszłości i inaczej do niego podchodzi; są to: „budowanie narodu i spójność społeczna”, „demokratyczna partycypacja i postawy obywatelskie” oraz „rozumienie dyscypliny”. Artykuł omawia, w jaki sposób kształtowało się nauczanie historii w szkołach średnich w Belgii (od jej powstania w 1830 roku) i jak ewoluowały jego główne cele. Belgia (a później Flandria) służy jako interesujący przypadek badawczy, gdyż kraj ten doświadczył trudnej, kontestowanej przeszłości, stał się państwem jednonarodowym w upadku i coraz bardziej właściwa mu jest międzykontynentalna imigracja. Wykorzystując wspomniane wyżej trzy kompleksy złożonych oczekiwań jako analityczne ramy badawcze, autor analizuje najistotniejsze zadania, które stoją przed przedmiotem szkolnym historia, następnie omawia zmiany, które zaszły w tym zakresie w minionych dwóch stuleciach i wyjaśnia ich przyczyny, a wreszcie docieka, jaki wpływ odmienne rodzaje nauczania historii wywarły na młodych ludzi. Analiza pozwala wyróżnić trzy zasadnicze etapy w dziejach nauczania historii w Belgii / Flandrii. Autor objaśnia, jakie główne cele stały przed wszystkimi trzema grupami i jakie przyniosły efekty. Artykuł zamyka krytyczna ocena omawianych celów oraz przedstawienie aktualnie mającej miejsce reformy przedmiotu szkolnego historia we Flandrii, a na końcu wskazanie czwartego celu: edukacji na przyszłość. [Trans. by Jacek Serwański]


2018 ◽  
Vol 7 (2) ◽  
pp. 179-195 ◽  
Author(s):  
Jan Doucek ◽  
Josef Zelenka

Abstract Geotourism is still a relatively new direction of tourism and its development is bound mainly to the territory of geoparks. Many geoparks try to develop different types of geo-products with a focus on different target groups. However, the nature of these products is very different and their development is evident mainly in the time scale. In the past, simple forms of interpretation and application of geoproducts were popular, whereas currently, modern technologies such as animations or augmented reality are thriving. This is mainly due to the better availability of technological equipment. At the same time, a number of geoparks boast of above-average interpreters, who are able to render and simplify difficult geological topics. This also applies to their ability to create of new geoproducts, where the need to abbreviate and condense information is evident. The results of the study show a positive trend in the use of modern methods in geoscience interpretation and in the creation of new geoproducts. At the same time, it is clear that without a modern concept it is very difficult to reach the current visitors. Therefore, such a concept is necessary in order to develop geoscientific issues, especially in the area of geoparks.


2021 ◽  
Vol 102 (7) ◽  
pp. 20-25 ◽  
Author(s):  
Stephanie Brown ◽  
Annie Allen

In the past decade, research-practice partnerships (RPPs) have grown in number and reputation. Stephanie Brown and Annie Allen describe the varied ways partnerships facilitate more sustained and productive relationships between researchers and practitioners. They share key findings from a comparative case study of three different types of RPPs focused on mathematics instructional improvement conducted by the National Center for Research in Policy and Practice (NCRPP) and make recommendations for how partnerships can build more authentic bridges between research and practice.


2021 ◽  
Vol 12 (1) ◽  
pp. 159-165
Author(s):  
Kritika Thakur ◽  
Sangeeta H Toshikhane ◽  
Dinesh Patil ◽  
Shikha Desai

Vata among tridosha is considered as the controller of everything in the Sharira. Vitated Vata itself effects the Dusyas which pervades the entire body or a part of it and gives rise to different types ailment is called Vatavyadhi. Pakshaghata is one of the important diseases of such criteria which is popularly known as Hemiplegia. A 60 years old male Patient, K/C/O of HTN Since 3 year & Stroke 3 Months ago complaining of Kinchita Vak-Aspastata (incomplete speech), Bhar-Vruddhi (Heaviness of left limbs), Vama bahu Karma alpata (Left upper limb weakness), Vama amsha sandhi stabhata (Left shoulder stiffness) since 3 Month. Patient was on various treatment methods for the past 2 months but did not get complete improvement. He came to Parul Ayurveda Hospital.  The patient was treated with Panchakarma procedure, Shamana Aushadhi and Physiotherapy. This study shows the effective result of Panchakarma treatment along with Shamana Aushadhi and Physiotherapy in Pakshaghata disease. It also helps to understand the pathophysiology of Pakshaghata through Ayurveda. In this study an attempt has been made to describe all Scientific effect of Panchakarma procedures, Shaman Aushadhis and effect of Physiotherapy has been explained in this case. 


Popular Music ◽  
2019 ◽  
Vol 38 (03) ◽  
pp. 457-480
Author(s):  
Michael Ahlers

AbstractThe article begins with a short history of German gangsta rap, followed by an overview of central theories and key concepts in hip-hop studies. It then focuses on a case study of a German gangsta rapper called Kollegah, who became one of Germany's most commercially successful artists of the past few years. The case study is divided into three parts: the first involves a deconstruction of both his artistic persona and his strategies of appropriating hip-hop cultures. This is followed by a closer look at two Kollegah productions, focusing on his rhyming and signifying skills. By adding a cursory qualitative media analysis of both Internet fan forums and print and television artefacts about Kollegah, very contradictory reactions can be depicted. The article is finally able to illustrate that this artist makes great use of a (typically German?) flavour of virtuosity and that he can draw from a very unique set of capital. Kollegah is viewed as representing a successful strategy of cultural appropriation and the use of different types of capital within the network of music business in its post-digital era.


Author(s):  
U. Aebi ◽  
P. Rew ◽  
T.-T. Sun

Various types of intermediate-sized (10-nm) filaments have been found and described in many different cell types during the past few years. Despite the differences in the chemical composition among the different types of filaments, they all yield common structural features: they are usually up to several microns long and have a diameter of 7 to 10 nm; there is evidence that they are made of several 2 to 3.5 nm wide protofilaments which are helically wound around each other; the secondary structure of the polypeptides constituting the filaments is rich in ∞-helix. However a detailed description of their structural organization is lacking to date.


2011 ◽  
Vol 33 (1-2) ◽  
pp. 7-19
Author(s):  
Kenneth Brophy
Keyword(s):  

The Scottish Theoretical Archaeology Group (STAG) conference organisers expressed some doubts about how far theory has changed, and impacted, archaeological establishment and academia in Scotland. In this paper, I will argue that Scotland is certainly not isolated in a theoretical sense, although in the past, Scottish archaeology could be accused of being theoretically conservative, or at least dependent on ideas and models developed elsewhere. A case-study looking at Neolithic studies will be used to illustrate that despite some recent critical historiographies of the study of the period in Scotland, archaeologists in Scotland and those working with Scottish material have been theoretically innovative and in step with wider paradigm changes. The study of the Neolithic in Scotland, it could be argued, has been shaped by theory more than the study of any other period; we are not isolated, but rather part of wider networks of discourse.


2017 ◽  
Vol 1 (1) ◽  
pp. 1-16
Author(s):  
John Harner ◽  
Lee Cerveny ◽  
Rebecca Gronewold

Natural resource managers need up-to-date information about how people interact with public lands and the meanings these places hold for use in planning and decision-making. This case study explains the use of public participatory Geographic Information System (GIS) to generate and analyze spatial patterns of the uses and values people hold for the Browns Canyon National Monument in Colorado. Participants drew on maps and answered questions at both live community meetings and online sessions to develop a series of maps showing detailed responses to different types of resource uses and landscape values. Results can be disaggregated by interaction types, different meaningful values, respondent characteristics, seasonality, or frequency of visit. The study was a test for the Bureau of Land Management and US Forest Service, who jointly manage the monument as they prepare their land management plan. If the information generated is as helpful throughout the entire planning process as initial responses seem, this protocol could become a component of the Bureau’s planning tool kit.


2017 ◽  
Vol 3 (2) ◽  
pp. 177
Author(s):  
Nur Huzeima Mohd Hussain ◽  
Hugh Byrd ◽  
Nur Azfahani Ahmad

Globalisation combined with resources of oil and gas has led to an industrial society in Malaysia.  For the past 30 years, rapid urban growth has shifted from 73% rural to 73% urban population. However, the peak oil crisis and economic issues are threatening the growth of urbanisation and influencing the trends of population mobility. This paper documents the beginnings of a reverse migration (urban-to-rural) in Malaysia.  The method adopted case study that involves questionnaires with the urban migrants to establish the desires, definite intentions and reasons for future migration. Based on this data, it predicts a trend and rate of reverse migration in Malaysia. 


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