277 research outputs found
A study of left-turn-on-red (LTOR) traffic control at signalized junctions in Singapore
No full textThe research study evaluated LTOR performance in Singapore on road user behaviours and their interactions, delay saving, and safety. A literature survey provided pertinent LTOR/RTOR experiences overseas. Field data were collected in 2001/02 from 5 LTOR junctions and 4 non-LTOR junctions via on-site observations.Master of Engineering (CEE
Spontaneous decays of magneto-elastic excitations in non-collinear antiferromagnet (Y,Lu)MnO3
No full textMagnons and phonons are fundamental quasiparticles in a solid and can be coupled together to form a hybrid quasi-particle. However, detailed experimental studies on the underlying Hamiltonian of this particle are rare for actual materials. Moreover, the anharmonicity of such magnetoelastic excitations remains largely unexplored, although it is essential for a proper understanding of their diverse thermodynamic behaviour and intrinsic zero-temperature decay. Here we show that in non-collinear antiferromagnets, a strong magnon-phonon coupling can significantly enhance the anharmonicity, resulting in the creation of magnetoelastic excitations and their spontaneous decay. By measuring the spin waves over the full Brillouin zone and carrying out anharmonic spin wave calculations using a Hamiltonian with an explicit magnon-phonon coupling, we have identified a hybrid magnetoelastic mode in (Y,Lu)MnO3 and quantified its decay rate and the exchange-striction coupling term required to produce it. (c) The Author(s) 20161991sciescopu
The Historical Characteristics of Munjip Editing and its Organization
No full textA Munjip, a collection of literary works, includes not only authors life and the thought, but also the atmosphere of the times that the author belongs to. That is why we should treat them significantly not only in researching of the authors individual thought, career and literature, but also of politics, thoughts and the view of literature at that times.
There are various kinds of organization of Munjip. In most cases it divides the whole works into poetry and prose and lines up poetry in chronological order and classifies prose by the style of writing. There are of course some exceptional cases for certain reasons. And in many cases supplement was added, say a chronological list of authors life, related works of his fellows, and criticism of descendants etc.
The styles in Munjip changes according to the demands of the times and historical backgrounds. For examples 15 pieces of Jesa in the 15 volume of gyewon-pilgyeong-jip reveal the aspect of taoism of Tang dynasty. these works created new traditions of composing Jesa among literati in Song and Goryeo period. There are some cases that Munjip in Joseon period establishes separately the style of Sangryangmun(a writing for the ceremony of putting up the ridge beam). It was the result of influence from China on one hand, and of the change of domestic situation that the ceremony was prevalent for social cohesion under official recognition on the other.
Editors of Munjip aims to collect the authors whole works. However, not a few works are omitted as theres also a tendency to select certain works under a certain editorial intention. In most cases it is due to (a) the contradiction between the intention of collecting the whole works and of keeping a certain editorial intention (b) the limit of information caused by classification of style (c) the question of Korean style Hanmun. There are also lots of cases that Munjip doesnt remain or remain incomplete because of political reasons. We need to collect the related literature and to establish open text with chronological order
The Challenges of Autonomous Vehicles In Malaysia: From The Perspective Of Motorcycle Traffic Crashes: DOI: https://doi.org/10.33093/ijomfa.2025.6.1.3
No full textThe Level 3 autonomous vehicle (AV) is now a reality on the public roads. While the emergence of AV is to eliminate the traffic crashes due to human error by 90%, the unexpected or errant drivings on the roads would, however lead to traffic crashes as the operation of AVs are depending on the artificial intelligence, which involve constantly teaching the computer to learn. In Malaysia, motorcycle fatalities accounted for about 60% of the total traffic fatalities, of which the majority of the fatalities were due to human errors. - The presence of motorcyclists in the traffic stream then becomes challenge to the operation of AVs due to the unpredictable and inconsistent behaviour of the motorcyclists. Therefore, to ensure the safe deployment of AVs in the country, this study is taken to unveil the characteristics of certain traffic crashes involving motorcyclists. The findings show that as high as 40% of the motorcycle casualties were due to the motorcycles’ faults. Careless driving, speeding, dangerous overtaking and turning are among the causal factors. The findings shed important insights to AV software programm developers in the process of detecting and processing necessary response plans. Besides, the car makers can also propose more crashworthiness vehicles from the perspective of vulnerable road users.
The Challenges of Autonomous Vehicles In Malaysia: From The Perspective Of Motorcycle Traffic Crashes
No full textThe Level 3 autonomous vehicle (AV) is now a reality on the public roads. While the emergence of AV is to eliminate the traffic crashes due to human error by 90%, the unexpected or errant drivings on the roads would, however lead to traffic crashes as the operation of AVs are depending on the artificial intelligence, which involve constantly teaching the computer to learn. In Malaysia, motorcycle fatalities accounted for about 60% of the total traffic fatalities, of which the majority of the fatalities were due to human errors. - The presence of motorcyclists in the traffic stream then becomes challenge to the operation of AVs due to the unpredictable and inconsistent behaviour of the motorcyclists. Therefore, to ensure the safe deployment of AVs in the country, this study is taken to unveil the characteristics of certain traffic crashes involving motorcyclists. The findings show that as high as 40% of the motorcycle casualties were due to the motorcycles’ faults. Careless driving, speeding, dangerous overtaking and turning are among the causal factors. The findings shed important insights to AV software programm developers in the process of detecting and processing necessary response plans. Besides, the car makers can also propose more crashworthiness vehicles from the perspective of vulnerable road users
Supremacy of realized variance MIDAS egression in volatility forecasting of mutual funds: empirical evidence from Malaysia
No full textCombining the strength of both Mixed Data Sampling (MIDAS) Regression and realized variance measures, this paper seeks to investigate two objectives: (1) evaluate the post-sample performance of the proposed weekly Realized Variance-MIDAS (RVar-MIDAS) in one-week ahead volatility forecasting against the established Generalized Autoregressive Conditional Heteroskedasticity (GARCH) model and the less explored but robust STES (Smooth Transition Exponential Smoothing) methods. (2) comparing forecast error performance between realized variance and squared residuals measures as a proxy for actual volatility. Data of seven private equity mutual fund indices (generated from 57 individual funds) from two different time periods (with and without financial crisis) are applied to 21 models. Robustness of the post-sample volatility forecasting of all models is validated by the Model Confidence Set (MCS) Procedures and revealed: (1) The weekly RVar-MIDAS model emerged as the best model, outperformed the robust DAILY-STES methods, and the weekly DAILY-GARCH models, particularly during a volatile period. (2) models with realized variance measured in estimation and as a proxy for actual volatility outperformed those using squared residual. This study contributes an empirical approach to one-week ahead volatility forecasting of mutual funds return, which is less explored in past literature on financial volatility forecasting compared to stocks volatility
Assessing Travellers’ Perceptions For Achieving Sustainable Transportation: A Case Study In Klang Valley.
No full textIn Malaysia, alleviating traffic congestion in major cities has always been given the top priority. Despite various remedial measures and efforts to improve public transport in Kuala Lumpur, there are nearly 2.2 million private vehicles moving into the city centre daily
A Conceptual Framework for Acceptance of Autonomous Vehicle in Malaysia: DOI: https://doi.org/10.33093/ijomfa.2024.5.1.7
No full textMobility is evolving globally. Automated vehicle technology is consistently advancing with the development of Artificial Intelligence and information communication technology. The Autonomous Vehicle is acknowledged with the benefits of reducing traffic fatalities, reduced emissions and convenience. If autonomous vehicles are widely adopted, the Sustainable Development Goals could be achieved. Various studies have been conducted to investigate the psychological factors (internal) as well as assess the efforts of institutions (external) in promoting the adoption of autonomous vehicles. Nonetheless, there is very few studies examined the impacts of internal and external factors on the acceptance of autonomous vehicles simultaneously. Therefore, this study is taken to close the gap in understanding the acceptance of autonomous vehicles in Malaysia by integrating the internal factors and external factors in a model. By reviewing the past studies, a conceptual framework which can offer a comprehensive insight to the policymakers and car makers from the public’s perspective is proposed. Implications from this study can serve as a basis for prioritising the budget resources and development guidelines for the successful implementation of autonomous vehicles in Malaysia
Heme iron from meat and risk of colorectal cancer: a meta-analysis and a review of the mechanisms involved
No full textRed meat and processed meat intake is associated with a risk of colorectal cancer, a major cause of death in affluent countries. Epidemiological and experimental evidence supports the hypothesis that heme iron present in meat promotes colorectal cancer. This meta-analysis of prospective cohort studies of colon cancer reporting heme intake included 566,607 individuals and 4,734 cases of colon cancer. The summary relative risk of colon cancer was 1.18 [95%C.I.: 1.06-1.32] for subjects in the highest category of heme iron intake compared with those in the lowest category. Epidemiological data thus show a suggestive association between dietary heme and risk of colon cancer. The analysis of experimental studies in rats with chemically-induced colon cancer showed that dietary hemoglobin and red meat consistently promote aberrant crypt foci, a putative pre-cancer lesion. The mechanism is not known, but heme iron has a catalytic effect on (i) the endogenous formation of carcinogenic N-nitroso compounds and (ii) the formation of cytotoxic and genotoxic aldehydes by lipoperoxidation. A review of evidence supporting these hypotheses suggests that both pathways are involved in heme iron toxicit
Preference Of Travellers For Sustainable Transportation Planning Objectives In Klang Valley, Malaysia.
No full textAchieving sustainable transportation is a global aim today. However, the actual implementation of sustainable principles is severely challenging the decision-makers.Various efforts attempted to reduce the ownership of private vehicles have not been fruitful. The failures may be attributed to the fact that public transport services are unable to provide
effective travel needs as offered by cars
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