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13 results on '"REZAIE, MOHSEN"'

1. Trajectory Clustering Performance Evaluation: If we know the answer, it's not clustering

Author

Rezaie, Mohsen and Saunier, Nicolas

Subjects
Computer Science - Machine Learning, Computer Science - Artificial Intelligence
Abstract

Advancements in Intelligent Traffic Systems (ITS) have made huge amounts of traffic data available through automatic data collection. A big part of this data is stored as trajectories of moving vehicles and road users. Automatic analysis of this data with minimal human supervision would both lower the costs and eliminate subjectivity of the analysis. Trajectory clustering is an unsupervised task. In this paper, we perform a comprehensive comparison of similarity measures, clustering algorithms and evaluation measures using trajectory data from seven intersections. We also propose a method to automatically generate trajectory reference clusters based on their origin and destination points to be used for label-based evaluation measures. Therefore, the entire procedure remains unsupervised both in clustering and evaluation levels. Finally, we use a combination of evaluation measures to find the top performing similarity measures and clustering algorithms for each intersection. The results show that there is no single combination of distance and clustering algorithm that is always among the top ten clustering setups.

Published
2021

2. Weakly Supervised Performance Evaluation of Trajectory Clustering

Author

Rezaie, Mohsen and Rezaie, Mohsen

Abstract

RÉSUMÉ: Avec l'avènement des nouvelles technologies au cours des dernières décennies, les techniques de collecte de données ont évolué et changé considérablement. Des appareils moins chers et plus récents ont facilité les tâches de collecte de données, tandis que la culture de la science ouverte a contribué à la disponibilité des ensembles de données collectées. D'autre part, les innovations technologiques et les méthodes d'analyse en constante amélioration ont facilité la tâche de traitement des données. Si ces changements technologiques contribuent à une évolution de l'analyse des données, les capacités humaines restent limitées. Par conséquent, les tâches manuelles peuvent potentiellement ralentir ce processus. Les méthodes d'apprentissage non supervisées constituent une solution pour résoudre le problème de la gestion et de l'analyse des mégadonnées. Les algorithmes de groupement (“clustering”), comme sont appelées les méthodes d'apprentissage non supervisées qui traitent de l'assignation des données à des catégories, jouent ici un rôle clé.Les études de circulation sont un domaine qui a largement utilisé ces algorithmes. Les trajectoires, en tant que source majeure d'informations dans les études de circulation, ont vu de nombreuses applications des méthodes de groupement. Cependant, dans la plupart des cas, l'évaluation des performances de ces méthodes a été négligé. ABSTRACT: With the advent of new technologies in the past few decades, data collection techniques have evolved and changed significantly. Cheaper and newer devices have made data collection tasks easier, while open source culture has contributed to the availability of the collected datasets. On the other hand, technological innovations and ever-improving analytical methods have facilitated the data processing task. While these technological changes are contributing to an evolution in the data analysis, human capabilities remain limited. Therefore, manual tasks can potentially slow down this process

Published
2021

3. Older people's needs following major disasters: a qualitative study of Iranian elders' experiences of the Bam earthquake

Author

Ardalan, Ali, Mazaheri, Monir, Naieni, Kourosh Holakouie, Rezaie, Mohsen, Teimoori, Fariba, and Pourmalek, Farshad

Subjects
Bam, Iran Earthquake, 2003 -- Social aspects, Bam, Iran Earthquake, 2003 -- Health aspects, Earthquakes -- Iran, Earthquakes -- Social aspects, Earthquakes -- Health aspects, Aged -- Health aspects, Aged -- Psychological aspects, Emergency management -- Management, Disaster relief -- Iran, Disaster relief -- Demographic aspects, Disaster relief -- Management, Company business management, Disaster planning, Health, Psychology and mental health, Seniors, Sociology and social work
Abstract

Eiders have long been recognised as among the most vulnerable people in disaster events. This paper reports a qualitative study of the self-perceived needs of older people in the aftermath of the Barn earthquake in Iran in 2003. A total of 56 people aged from 65 to 88 years were recruited to the study using purposive sampling, including 29 men and 27 women. Six focus group discussions and ten semi-structured individual interviews were conducted. Each focus group involved six to ten people from the cities of Bam and Baravat and their rural suburbs. Content analysis was used to analyse the transcribed data. The analysis identified four major themes among the informants' concerns: inappropriate service delivery, affronts to dignity, feeling insecure and emotional distress. A disaster-prone country like Iran needs to be appropriately prepared with culturally sensitive plans to meet the needs of those who suffer from their effects, not least older people. Emergency relief managers should note that for many older people in a disaster zone, customary forms of relief are neither required nor appropriate, and that their distinctive immediate and long-term needs should be assessed and met. Relief agencies need to be trained to be age-sensitive and should mainstream older people's rights in the planning and implementation of both the response and recovery phases of assistance. KEY WORDS--older people's needs, disaster, Iran, qualitative study. doi: 10.1017/S0144686X09990122

Published
2010

5. The effect of heparin after primary percutaneous coronary intervention on short-term clinical outcomes in patients with ST-segment elevation myocardial infarction

Author

Rouzbahani, Mohammed, primary, Rezaie, Mohsen, additional, Salehi, Nahid, additional, Janjani, Parisa, additional, Moghadam, Reza Heidari, additional, Rai, Alireza, additional, Montazeri, Nafiseh, additional, Naderipour, Arsalan, additional, Rad, Etrat Javadi, additional, Asgari, Nader, additional, Mahmoudi, Sousan, additional, Motevaseli, Sayeh, additional, and Azimivaghar, Javad, additional

Published
2020
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8. General Theory of Money: A New Approach

Author

Rezaie, Mohsen

Subjects
ComputerApplications_MISCELLANEOUS, jel:E40, Asset-money, Credit-money, Saving, Monetary Theory, Monetary Variables, Monetary Integration, TheoryofComputation_GENERAL
Abstract

Money, credit and monetary markets are interlinked with each other and linked to real sector of the economy. There is clearly no single market called money market, but there are two money markets, asset-money and credit-money markets, that money is created by the interactions between them. This created money would, then, enter into economic activities and to facilitate producing and transacting in the real sector. In other words, money is a heavenly creature that is created through interactions between money markets in the sky of monetary markets that returns to the land of real markets. In other words, monetary intermediaries, like firms, produce money within credit and savings process. In addition, monetary integration takes place by interaction of money markets.

Published
2014

13. Effects of some flavonoids on the susceptibility of low-density lipoprotein to oxidative modification.

Author

Safari MR, Rezaie M, and Sheikh N

Subjects
Copper pharmacology, Humans, Male, Oxidation-Reduction drug effects, Antioxidants pharmacology, Flavonoids pharmacology, Lipoproteins, LDL metabolism
Abstract

The effects of six flavonoids viz., apigenin, genistein, morin, naringin, pelargonidin and quercetin on the susceptibility of low-density lipoprotein (LDL) to oxidative modification were investigated. Flavonoids were added to plasma and incubated for 3 hr at 37 degrees C, and the LDL fraction was separated by ultracentrifugation. Oxidizability of LDL was estimated by measuring conjugated diene (CD), lipid peroxides and thiobarbituric acid-reactive substances (TBARS), after cupric sulfate solution was added. Quercetin and morin significantly (P<0.01 by ANOVA) prolonged the lag time before initiation of oxidation reaction in dose-dependent manner. They also suppressed the formation of lipid peroxides and TBARS more markedly than other flavonoids. The ability to prolong lag time and suppression of lipid peroxides and TBARS formation was in the following order: quercetin >morin >pelargonidin >genistein >naringin >apigenin. LDL exposed to flavonoids reduced oxidizability. These findings suggest that flavonoids may have a role in ameliorating atherosclerosis.

Published
2003

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