scholarly journals Critical Continuous Rainfall Map for Forecasting Shallow Landslide Initiations in Busan, Korea

Water ◽  
2020 ◽  
Vol 12 (9) ◽  
pp. 2404
Author(s):  
Joon-Young Park ◽  
Seung-Rae Lee ◽  
Seboong Oh ◽  
Jung Hyun Lee ◽  
Jun-Seo Jeon ◽  
...  
Keyword(s):  
Shallow Landslide ◽  
Variable Threshold ◽  
Modeling Process ◽  
Field Samples ◽  
Landslide Forecasting ◽  
Preparatory Stage ◽  
Rainfall Map ◽  
Short Time ◽  
Continuous Rainfall

In recent years, precipitation patterns in Korea have shifted to be characterized as short and intense rainfalls. In consideration of shallow landslide initiations primarily governed by heavy rainfalls at short-time scales that diminish drainage effects, the concept of critical continuous rainfall is proposed as a single-rainfall-variable threshold for shallow landslide forecasting. To generate a critical continuous rainfall map for hillslope areas in a city of Korea (Busan), this study designed and applied a systematic modeling process. As a preparatory stage, input datasets of geo-hydraulic properties and geotechnical properties were assembled using estimation techniques based on experiment data of field samples. The inherent and fixed critical continuous rainfall values for hillslope areas in Busan were derived through one-dimensional infiltration analysis coupled with infinite slope stability calculations. As a result of a detailed analysis of historical rainfall records in a case study area over a period of 11 years, three false forecasting cases were recorded, whereas all landslide-triggering rainfall events were correctly captured with no missed forecasting cases. The results of the case study indicate that the proposed critical continuous rainfall may be useful as an effective and straightforward indicator for forecasting the initiation of shallow landslides.

Optimales Layout einer Walderschliessung

2016 ◽  
Vol 167 (5) ◽  
pp. 294-301
Author(s):  
Leo Bont
Keyword(s):  
Road Network ◽  
Spatial Arrangement ◽  
Problem Situation ◽  
Optimal Layout ◽  
Forest Road ◽  
The Road ◽  
Network Cost ◽  
User Friendly ◽  
Short Time

Optimal layout of a forest road network The road network is the backbone of forest management. When creating or redesigning a forest road network, one important question is how to shape the layout, this means to fix the spatial arrangement and the dimensioning standard of the roads. We consider two kinds of layout problems. First, new forest road network in an area without any such development yet, and second, redesign of existing road network for actual requirements. For each problem situation, we will present a method that allows to detect automatically the optimal road and harvesting layout. The method aims to identify a road network that concurrently minimizes the harvesting cost, the road network cost (construction and maintenance) and the hauling cost over the entire life cycle. Ecological issues can be considered as well. The method will be presented and discussed with the help of two case studies. The main benefit of the application of optimization tools consists in an objective-based planning, which allows to check and compare different scenarios and objectives within a short time. The responses coming from the case study regions were highly positive: practitioners suggest to make those methods a standard practice and to further develop the prototype to a user-friendly expert software.

Analysis of shallow landslide mechanism of expansive soil slope under rainfall: a case study

2021 ◽  
Vol 14 (7) ◽  
Author(s):  
Chao Liang ◽  
Zhijian Wu ◽  
Xinfu Liu ◽  
Zhaomei Xiong ◽  
Tao Li
Keyword(s):  
Expansive Soil ◽  
Shallow Landslide ◽  
Soil Slope ◽  
Landslide Mechanism

Implementation of medium voltage remote controlled switches to improve quality performance indexes – a case study

2020 ◽  
Vol 21 (4) ◽  
Author(s):  
Julio Cezar Santos ◽  
Wagner Santos ◽  
Guilherme Cestaro ◽  
Marcio Zamboti Fortes ◽  
Henrique Henriques
Keyword(s):  
Energy Distribution ◽  
Electric Energy ◽  
Regulatory Agencies ◽  
Quality Performance ◽  
Medium Voltage ◽  
Fast Detection ◽  
Performance Indexes ◽  
Short Time ◽  
Operation Center

AbstractThe growing demand for quality in the Energy Distribution Service, both by consumers and by regulatory agencies, obliges most distribution utilities to apply technologies that can be easily implemented and produce results in a short term horizon. The telecontrol technology is an essential tool every time it is necessary to fast restore the energy supply. This technology, which is completely supervised and controlled by the system operation center, allows the fast detection of a fault at a distance and switch an equipment without the aid of the operating crew, thus reducing the time that the power supply is unavailable. The present paper describes a Telecontrol Project, incorporated in an electric energy distribution utility in Brazil and compares the results in quality improvement with others usual investment actions, such as operating and maintenance procedures, laterals protection and network reinforcement. This paper shows, analyzing the results, that to improve the reliability indexes in a short time, when the company’s economic recovery is more important, the application of remotely controlled switch is more effective.

The Awakening of a New Form of Christianity? Catholicism in the Cariri Region (Brazil)

Exchange ◽  
2006 ◽  
Vol 35 (4) ◽  
pp. 383-397
Author(s):  
Jan Joris Rietveld
Keyword(s):  
Catholic Church ◽  
Cultural Context ◽  
The Awakening ◽  
Evangelical Churches ◽  
Rural Zone ◽  
New Form ◽  
Short Time ◽  
The Church ◽  
The Catholic Church

AbstractThe Cariri region is the most isolated and poor part of the rural zone of the diocese of Campina Grande in the Paraiba state of Brazil. The Catholic Church has been present here for a relatively short time: 335 years. Moreover the region has an isolated context and this favors conservatism so that only fundamental changes have an impact. These facts make the Cariri an interesting region for a case study about how Catholicism develops. I distinguish five periods, which are described with religious key words and situated in the socio-cultural context. This classification is a schematization: different types of Catholicism often exist together. It is obvious that the dominant features of Catholicism change with time, but in the mainstream of the fifth period we see a small revolution. Now there are not only influences in the socio cultural context and factors in the Church itself that cause changes, but there are also influences of powerful newcomers, the evangelical churches. Their main impact is that many people have left the Catholic Church and are going to live their old faith in a new form. The Catholic Church is searching for adequate ways to respond to this phenomenon.

scholarly journals Definiteness Systems and Dialect Classification

Languages ◽  
2021 ◽  
Vol 6 (3) ◽  
pp. 128
Author(s):  
Mike Turner
Keyword(s):  
Binary System ◽  
Recent Work ◽  
Classification Schemes ◽  
Modeling Process ◽  
Arabic Dialects ◽  
Dialect Classification ◽  
Semantic Typology

In this article I explore how typological approaches can be used to construct novel classification schemes for Arabic dialects, taking the example of definiteness as a case study. Definiteness in Arabic has traditionally been envisioned as an essentially binary system, wherein definite substantives are marked with a reflex of the article al- and indefinite ones are not. Recent work has complicated this model, framing definiteness instead as a continuum along which speakers can locate referents using a broader range of morphological and syntactic strategies, including not only the article al-, but also reflexes of the demonstrative series and a diverse set of ‘indefinite-specific’ articles found throughout the spoken dialects. I argue that it is possible to describe these strategies with even more precision by modeling them within cross-linguistic frameworks for semantic typology, among them a model known as the ‘Reference Hierarchy,’ which I adopt here. This modeling process allows for classification of dialects not by the presence of shared forms, but rather by parallel typological configurations, even if the forms within them are disparate.

scholarly journals DECISION TREE C4.5 ALGORITHM FOR TUITION AID GRANT PROGRAM CLASSIFICATION (CASE STUDY: DEPARTMENT OF INFORMATION SYSTEM, UNIVERSITAS TEKNOKRAT INDONESIA)

2020 ◽  
Vol 7 (1) ◽  
Author(s):  
Heni Sulistiani ◽  
Ahmad Ari Aldino
Keyword(s):  
Decision Tree ◽  
Classification Model ◽  
Grant Program ◽  
C4.5 Algorithm ◽  
Long Time ◽  
The Right ◽  
Short Time ◽  
Tuition Fee

In pandemic era, almost everyone struggles for their life. College students are such example. They have difficulty in paying tuition fee to continue their study. Based on this problematic situation, Universitas Teknokrat Indonesia grants the students who have good academic performance with tuition fee aid program. Many variables used for determining the grant made it hard to make a decision in a short time or even takes very long time. To make it easier for management to decide who is the right student to get grant, it needs classification model. The purpose of this study is the classification of grant recipients by using decision tree C4.5 algorithm. That can determine whether a potential student can be accepted as an awardee or not. Then, the results of the classification are validated with ten-fold cross validation with an accuracy, precision and recall with the score of 87 % for all part. It means the model perform quite well to be implemented into system.

scholarly journals Aboriginal Tourism as Sustainable Social-Environmental Enterprise (SSEE): A Tlingit Case Study from Southeast Alaska

2015 ◽  
Vol 6 (4) ◽  
Author(s):  
Paphaphit Wanasuk ◽  
Thomas F Thornton
Keyword(s):  
Cultural Economic ◽  
Southeast Alaska ◽  
Operational Strategies ◽  
Cultural Sustainability ◽  
Operating Space ◽  
Social Environmental ◽  
Short Time ◽  
Safe Operating ◽  
Dominant Influence

The Tlingit Aboriginal tourism enterprise named Icy Strait Point in Hoonah, Southeast Alaska is used as a case study to develop the new concept of Sustainable Social-Environmental Enterprise (SSEE). SSEE is defined as an innovative enterprise that has dynamic operational strategies while still maintaining its corporate core values and integrating social, environmental, cultural, economic and political (SECEP) sustainabilities in its operations. The SSEE framework assesses enterprises according to five domains of sustainability: social, environmental, cultural, economic, and political. Applying this framework, we find that while social, economic, and cultural sustainability goals have been achieved in a relatively short time by the Aboriginal tourism enterprise in Hoonah, the political and environmental spheres of sustainability are constrained by the dominant influence of the multinational cruise ship industry over tourism development. Thus, for an emerging tourism enterprise to be sustainable, we suggest each of these livelihood dimensions needs to achieve "a safe operating space" that is adaptable over time and to changing social and environmental circumstances.

scholarly journals Para além da Educação a Distância: Práticas Formativas e Relacionais em um Curso de Ciências Biológicas

EAD em FOCO ◽  
2015 ◽  
Vol 5 (1) ◽  
Author(s):  
Germana Costa Paixão ◽  
Ana Ciléia Pinto Teixeira Henriques ◽  
Francisco Fábio Castelo Branco ◽  
Eloisa Maia Vidal
Keyword(s):  
Biological Sciences ◽  
Higher Education ◽  
Distance Education ◽  
Distance Learning ◽  
Education Technology ◽  
State University ◽  
Relational Practice ◽  
Short Time ◽  
Affective Skills

As práticas de formação que incentivam o desenvolvimento das habilidades afetivas em estudantes têm sido avaliadas no contexto de ensino a distância no Brasil. O estudo tem como objetivo apresentar práticas formativas e relacionais desenvolvidas no curso de Ciências Biológicas na modalidade a distância de uma universidade estadual no Ceará. É um estudo descritivo-reflexivo em forma de estudo de caso que discute experiências em andamento, sendo estas: Monitoria Acadêmica; Vida em Foco; Ciência na Escola e Musicalizando a Biologia. As atividades têm procurado desenvolver nos alunos o espírito de colaboração e da experiência de realidade em que, em um curto espaço de tempo, estarão inseridos. Acredita-se que, dessa forma, se permite um ensino mais crítico e reflexivo, no qual novas ferramentas são oportunizadas e que podem romper a hierarquia ainda persistente entre professores e alunos. Palavras-chave: Ensino; Atitude; Educação a distância; Educação superior; Tecnologia da educação.Beyond the Distance Education: Formation and Relational Practice in a Biological Sciences CourseAbstract Training practices that encourage the development of affective skills in students have been valued in the context of distance learning (DL) in Brazil. The study aims to provide formative and relational practices developed in the course of Biological Sciences in the distance mode of a state university in Ceara. It is descriptive-reflective research in the form of case study that discusses the following ongoing experiments: Academic Monitoring; Life in Focus; Science in School and Musicalizing Biology. The activities have sought to develop in students the spirit of collaboration and the experience of reality in which they, in a short time, will be placed. It is believed that  this way allows more critical and reflective teaching, in which new tools become available for DL that will break the persistent hierarchy between teachers and students.Keywords: Teaching; Attitude; Distance education; Higher education; Education technology.

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