scholarly journals Investigation into Interactions between Accident Consequences and Traffic Signs: A Bayesian Bivariate Tobit Quantile Regression Approach

2018 ◽  
Vol 2018 ◽  
pp. 1-10 ◽  
Author(s):  
Xuecai Xu ◽  
Željko Šarić
Keyword(s):  
Quantile Regression ◽  
Regression Models ◽  
Close Relation ◽  
Warning Signs ◽  
Material Damage ◽  
Accident Rate ◽  
Traffic Signs ◽  
Accident Severity ◽  
Severity Levels ◽  
The Republic

This study intended to investigate the interactions between accident severity levels and traffic signs in state roads located in Croatia and explore the correlation between accident severity levels and heterogeneity attributed to unobserved factors. The data from 460 state roads between 2012 and 2016 were collected from Traffic Accident Database System maintained by the Republic of Croatia Ministry of the Interior. To address the correlation and heterogeneity, Bayesian bivariate Tobit quantile regression models were proposed, in which the bivariate framework addressed the correlation of residuals with Bayesian approach, while the Tobit quantile regression model accommodated the heterogeneity due to unobserved factors. By comparing the Bayesian bivariate Tobit quantile and mean regression models, the proposed quantile models showed priority to mean model. Results revealed that (1) low visibility and the number of invalid traffic signs per km increased the accident rate of material damage, death, or injury; (2) average speed limit exhibited a close relation with accident rate; and (3) the number of mandatory signs was more likely to reduce the accident rate of material damage, while the number of warning signs was significant for accident rate of death or injury.

scholarly journals ANALYSIS OF TRAFFIC ACCIDENTS IN THE DISTRICT GRESIK (Case Study: Road Duduksampeyan Sta km 16 + 000 - Sta km 16 + 500)

2020 ◽  
Vol 3 (2) ◽  
pp. 1-7
Author(s):  
Debi Fariska ◽  
Sri Wiwoho Mudjanarko
Keyword(s):  
Road Safety ◽  
Traffic Accident ◽  
Traffic Accidents ◽  
Material Damage ◽  
Accident Rate ◽  
Speed Limits ◽  
Traffic Signs ◽  
The Road ◽  
On The Road

Traffic accident is an accident that occurs unexpectedly and unintentionally involving a vehicle which resulted in casualties and material damage. The problem of traffic accidents on the road Duduksampeyan Sta km 16 + 000 - Sta km 16 + 500 is the most significant. The purpose of this study was conducted to determine the level of traffic accidents that occurred in 2013-2018. This study uses a method that refers to the calculation of the number of accidents. The observations in the field of road safety facilities are still inadequate, lighting is in only one side of the road as much as ± 10 pieces, and the absence of traffic signs (speed limits, accident-prone areas, etc.). The volume of daily traffic averages on these roads as much as 3833 veh / hour. The results of the analysis carried accident rate by 158 the highest annual accident / km occurred in 2018. Meanwhile, based on the fatality index, it was 47.76%, the highest in 2013.

scholarly journals STUDI EVALUASI PENEMPATAN RAMBU DAN MARKA TERHADAP GEOMETRIK JALAN DI KECAMATAN TERNATE BARAT

2021 ◽  
Vol 4 (1) ◽  
pp. 82
Author(s):  
Muhammad Taufiq Yuda Saputraa ◽  
Chairul Anwar
Keyword(s):  
Road Traffic ◽  
Warning Signs ◽  
Traffic Signs ◽  
Field Surveys ◽  
Urban Road ◽  
Public Facilities ◽  
The Republic ◽  
Shape And Size

About 90% of the information needed to drive is received by the driver visually through the eye. Little information is received by hearing (horns, shock markers) and sense of taste (rough profile/walking markers). The research objective was to evaluate the performance of traffic signs and road markings on several roads in Ternate City.This type of research is a combination of direct field surveys and observations as well as literature (literature) related to the placement of signs and markers in accordance with urban road traffic standards. This research was conducted on Jalan Merdeka and Jalan Ahmad Yani, Ternate City with the consideration that these roads have a fairly high traffic density.The results of the survey and observation of the condition of signs and road markings for Jalan Merdeka and Jalan Ahmad Yani in Ternate City, namely: there are still traffic signs that are not maintained and the condition of the signs is damaged. It is necessary to repair the leaf signs and repainting it. In some direction signs, the shape and size of the writing do not meet the standards of the Minister of the Republic of Indonesia No. 61 of 1993. Recommendations for placing signs and markings on roads with incomplete road equipment are as follows: warning signs for intersections, warning signs for T-junction, crossing signs and placing signs for public facilities.

Labour migration and its impact on employment in the Republic of Bashkortostan

2017 ◽  
Vol 31 (2) ◽  
pp. 67-74
Author(s):  
G. V. Yakshibaeva
Keyword(s):  
Migrant Workers ◽  
Close Relation ◽  
The State ◽  
Labour Migration ◽  
Rational Selection ◽  
Labor Migrants ◽  
Republic Of Bashkortostan ◽  
The Republic ◽  
External Migration

The problem of providing the most efficient and rational selection, distribution, use of migrant workers, with regard to both internal and external migration in close relation to socio-economic and demographic interests of the state are currently of particular relevance. Scientific novelty of work consists in the identification of factors and directions of flows as departing and arriving labor migrants in the Republic of Bashkortostan, the characteristics of the development of labour migration and its impact on employment, which allowed to identify problems and negative trends.

scholarly journals Forecasting Large Price Declines of the Nikkei Using the S&P 500 Implied Volatility

2016 ◽  
Vol 8 (1) ◽  
pp. 58
Author(s):  
Chikashi Tsuji
Keyword(s):  
Quantile Regression ◽  
Regression Models ◽  
Implied Volatility ◽  
Predictive Power ◽  
Downside Risk ◽  
Price Changes ◽  
Empirical Results ◽  
Left Tail

This paper empirically examines the forecast power of the previous day’s US implied volatility for large declines of the Nikkei by using several versions of quantile regression models. All our empirical results suggest that the previous day’s US S&P 500 implied volatility has forecast power for large price drops of the Nikkei 225 in Japan. Since we repeatedly and carefully tested the several left tail risks in price changes of the Nikkei and we also tested by using some different versions of quantile regression models, our evidence of the predictive power of the S&P 500 implied volatility for downside risk of the Nikkei is very robust.

scholarly journals The comparison of censored quantile regression methods in prognosis factors of breast cancer survival

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Akram Yazdani ◽  
Mehdi Yaseri ◽  
Shahpar Haghighat ◽  
Ahmad Kaviani ◽  
Hojjat Zeraati
Keyword(s):  
Breast Cancer ◽  
Quantile Regression ◽  
Survival Time ◽  
Censored Data ◽  
Regression Models ◽  
Cancer Survival ◽  
Breast Cancer Survival ◽  
Right Censored Data ◽  
Censored Quantile Regression ◽  
Covariate Effects

AbstractThe Cox proportional hazards model is a widely used statistical method for the censored data that model the hazard rate rather than survival time. To overcome complexity of interpreting hazard ratio, quantile regression was introduced for censored data with more straightforward interpretation. Different methods for analyzing censored data using quantile regression model, have been introduced. The quantile regression approach models the quantile function of failure time and investigates the covariate effects in different quantiles. In this model, the covariate effects can be changed for patients with different risk and is a flexible model for controlling the heterogeneity of covariate effects. We illustrated and compared five methods in quantile regression for right censored data included Portnoy, Wang and Wang, Bottai and Zhang, Yang and De Backer methods. The comparison was made through the use of these methods in modeling the survival time of breast cancer. According to the results of quantile regression models, tumor grade and stage of the disease were identified as significant factors affecting 20th percentile of survival time. In Bottai and Zhang method, 20th percentile of survival time for a case with higher unit of stage decreased about 14 months and 20th percentile of survival time for a case with higher grade decreased about 13 months. The quantile regression models acted the same to determine prognostic factors of breast cancer survival in most of the time. The estimated coefficients of five methods were close to each other for quantiles lower than 0.1 and they were different from quantiles upper than 0.1.

scholarly journals The consequences of the Romanian occupation of 1941–1944 for the Orthodox Church of Moldova

Rusin ◽  
2021 ◽  
pp. 190-204
Author(s):  
V.A. Sodol ◽  
Keyword(s):  
Religious Organizations ◽  
Russian Orthodox ◽  
Material Damage ◽  
Orthodox Church ◽  
Russian Orthodox Church ◽  
Republic Of Moldova ◽  
Three Stages ◽  
The Republic ◽  
Church Buildings

The article presents the facts of material damage caused by the German-Romanian invaders to the institutions of the Orthodox Church of Moldova. The analysis of the archives of the Republic of Moldova, the Pridnestrovian Moldavian Republic and the works of researchers revealed three stages of damage inflicted by the invaders on religious organizations. The total amount of damage amounted to 91.5 million rubles, including church buildings – 22,580,000 rubles (including the churches of Pridnestrovie – 4,192,423 rubles). The invaders destroyed the buildings of 44 churches and 2 chapels, partially damaged 22 churches. Dozens of valuable religious shrines were removed from Moldovan churches and monasteries. The most valuable loss is a copy of the Gerbovetsky Icon of the Most Holy Mother of God (worth 120 mln rubles). The invaders also stole church utensils and priestly vestments. The motive for these actions was the alleged desire to “save” the shrines from destruction by the Bolsheviks. The leadership of the Russian Orthodox Church has repeatedly raised the question of returning the valuables taken by the occupiers to the Romanian side. However, the problem has not been solved, though a small part of the property stolen by the invaders returned to the Moldovan churches.

Sign in / Sign up

Export Citation Format

Share Document