EFFECT OF DROWSINESS ON DRIVING PERFORMANCE VARIABLES OF COMMERCIAL VEHICLE DRIVERS

A. MORTAZAVI,A. ESKANDARIAN,R. A. SAYED 한국자동차공학회 2009 International journal of automotive technology Vol.10 No.3

Driver drowsiness is a major safety concern, especially among commercial vehicle drivers, and is responsible for thousands of accidents and numerous fatalities every year. The design of a drowsiness detection system is based on identifying suitable driver-related and/or vehicle-related variables that are correlated to the driver’s level of drowsiness. Among different candidates, vehicle control variables seem to be more promising since they are unobtrusive, easy to implement, and cost effective. This paper focuses on in-depth analysis of different driver-vehicle control variables, e.g., steering angle, lane keeping, etc. that are correlated with the level of drowsiness. The goal is to find relationships and to characterize the effect of a driver’s drowsiness on measurable vehicle or driving variables and set up a framework for developing a drowsiness detection system. Several commercial drivers were tested in a simulated environment and different variables were recorded. This study shows that drowsiness has a major impact on lane keeping and steering control behavior. The correlation of the number and type of accidents with the level of drowsiness was also examined. Significant patterns in lateral position variations and steering corrections were observed, and two phases of drowsiness-related degradation in steering control were identified. The two steering degradation phases examined are suitable features for use in drowsiness detection systems. Driver drowsiness is a major safety concern, especially among commercial vehicle drivers, and is responsible for thousands of accidents and numerous fatalities every year. The design of a drowsiness detection system is based on identifying suitable driver-related and/or vehicle-related variables that are correlated to the driver’s level of drowsiness. Among different candidates, vehicle control variables seem to be more promising since they are unobtrusive, easy to implement, and cost effective. This paper focuses on in-depth analysis of different driver-vehicle control variables, e.g., steering angle, lane keeping, etc. that are correlated with the level of drowsiness. The goal is to find relationships and to characterize the effect of a driver’s drowsiness on measurable vehicle or driving variables and set up a framework for developing a drowsiness detection system. Several commercial drivers were tested in a simulated environment and different variables were recorded. This study shows that drowsiness has a major impact on lane keeping and steering control behavior. The correlation of the number and type of accidents with the level of drowsiness was also examined. Significant patterns in lateral position variations and steering corrections were observed, and two phases of drowsiness-related degradation in steering control were identified. The two steering degradation phases examined are suitable features for use in drowsiness detection systems.

Silver nanoparticle-based spectrophotometric method for quantification of nile blue A in river water

S.S. Mortazavi,R. Sahraei,A. Farmany 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.4

A novel and sensitive spectrophotometric method is developed for the determination of nanomolar level of nile blue A in water samples based on its catalytic effect of silver nanoparticles on the oxidation of nile blue A by hexacyanoferrate (III) in acetate-acetic acid medium and at 25 ℃. The absorbance is measured at 595.5 nm with the fixed-time method. The optimization of the operating conditions regarding concentration of the reagents, temperature and interferences is also investigated. The calibration curve is linear over the concentration range between 85 and 2000 nM of nile blue A with good precision and accuracy. The detection limit of the method is down to 54. The relative standard deviation for a standard solution of 100.0 nM of nile blue A is 1.63% (n = 10). The proposed method provides a highly sensitive, selective and relatively rapid assay for nile blue A at nanomolar level without any pre-concentration and separation step. The method was applied to the determination of nile blue A in river water samples.

“The PaakShooy”: A Robotics Cell for Washing and Preparation of a Corpse for an Islamic Burial

A. Meghdari,K. G. Osgouie,E. Nasiri,A. R. Nemati,A. M. Mortazavi 제어로봇시스템학회 2011 제어로봇시스템학회 국제학술대회 논문집 Vol.2011 No.10

Washing the body and dressing the corpse prior to burial is an act of love and necessity in many religions. Applying robotics and automation technologies for washing and preparation of a deceased Moslem in accordance to the Islamic Shari’a laws has been the challenging foundation of this research. With increasing annual population growth and as a result an increase in number of deaths (historically and/or immediately after a national disaster), automating part of this procedure to increase speed of operation, reducing the health risks to the personnel of washing rooms “Ghassalkhaneh” at the cemeteries and enhancing their quality of life has been the utmost objective of this project. We have named and patented this semi-automated corpse preparation machine as the “PaakShooy” or “ ??? ??? ” in Persian (Farsi) which means purifying the deceased. The whole process is composed of three operational units lined up in series; the automatic washing chamber, drying cell, and the semi-automatic shrouding table. This paper covers an introductory concept of the subject in Islam, a conceptual design of various machines and mechanism to automate the important tasks in accordance to Islamic laws, and the final detailed design, simulation, and animation of the PaakShooy machine. In doing so, consultation with Islamic scholars has been a priority from the beginning of the project to the end.

Voltammetric determination of copper in water samples using a Schiff base/carbon nanotube-modified carbon paste electrode

V. Izadkhah,A. Farmany,S.S. Mortazavi 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.21 No.1

In the present study, a novel Schiff base modified multiwalled carbon nanotube paste sensor wasdeveloped for the determination of trace amounts of copper in environmental samples. It is based on theencapsulation of the C24H30N6 Schiff base onto multiwalled carbon nanotube paste electrode. Theoperating conditions regarding supporting electrolytes, deposition time and applied potential on thesensitivity of electrode were established and optimized in detail. The working curve was linear in theconcentration range of 0.09–340 mg L 1. The relative standard deviation for 3 replicate determination ofthe 30 mg L 1 Cu(II) was 1.47%. The detection limit and quantification limit were 0.01 and 0.06 mg L 1,respectively. The sensor was successfully applied to the determination of copper in the river and citywater.

Association of a Synthetic Bone Graft and Bone Marrow Cells as a Composite Biomaterial

S. M. Rabiee,S. M. J. Mortazavi,F. Moztarzadeh,D. Sharifi,F. Fakhrejahani,A. Khafaf,S. A. Houshiar Ahmadi,N. Nosoudi,R. Ravarian 한국생물공학회 2009 Biotechnology and Bioprocess Engineering Vol.14 No.1

Porous calcium phosphates have osteoconductive properties. The aim of this study was to obtain synthetic calcium phosphate bone graft substitute. X-ray diffraction was employed to investigate the formation of the beta-tricalcium phosphate (β-TCP) phase. We evaluated the effects of bone marrow on the osteoconductivity and mechanical properties of synthetic bone graft (SG). SG cylinders loaded with bone marrow (SGBM) and SG alone were implanted into rabbits femoral condyle bone defects. Histological examinations revealed the resorption of the SG, trabecular bone with osteoblasts and osteoid substance around the implants, and colonization inside the porous β-TCP by newly formed bone. Histomorphometry conducted after three months revealed the osteoid surface to be higher in SGBM than SG (p < 0.05). The compressive strengths of SG and SGBM were significantly higher than the anatomic control at all time periods. The elastic modulus of SBG and SGBM became weaker after implantation. The present results indicate that β-TCP is a good matrix for bone marrow, which contributes osteoinductive properties in an orthotopic. The composite biomaterial may be useful in reconstructive bone surgery.

Enhanced triisopropylbenzene cracking and suppressed coking on tailored composite of Y-zeolite/amorphous silica–alumina catalyst

M.S. Aghakhani,A.A. Khodadadi,Sh. Najafi,Y. Mortazavi 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.5

Catalytic composites of Y-zeolite-amorphous silica–alumina (ASA) were prepared by four different methods to enhance pre-cracking and cracking of triisopropylbenzene (TIPB). TIPB cracking on composite catalysts were compared with a conventionally prepared catalyst. The samples were characterized by FESEM, XRD, N2-adsorption and NH3-TPD. The catalysts performance was evaluated by triisopropylbenzene cracking at 350˚ C in a fixed bed reactor. The coke content of the catalysts was measured by TPO. Compared to the conventional catalyst, significantly deeper cracking to benzene of about 117% higher, up to 62% lower amount of coke, and lower deactivation rate are observed for the composite catalysts.

Genomic Profiling of Chronic Myelogenous Leukemia: Basic and Clinical Approach

Aliasghar Keramatinia,Alireza Ahadi,Mohammad Esmaeil Akbari,Maryam Mohseny,Alireza Mosavi Jarahi,Narjes Mehrvar,Neda Mansouri,S.A. Mortazavi Tabatabaei,Abolfazl Movafagh 대한암예방학회 2017 Journal of cancer prevention Vol.22 No.2

Chronic myeloid leukemia (CML) is a hematological stem cell cancer driven by BCR-ABL1 fusion protein. We review the previous and recent evidence on the significance of CML in diagnostic and clinic management. The technical monitoring of BCR-ABL1 with quantitative real time-PCR has been used in assessing patient outcome. The cytogenetic mark of CML is Philadelphia chromosome, that is formed by reciprocal chromosomal translocations between human chromosome 9 and 22, t(9:22) (q34:q11). It makes a BCR-ABL1 fusion protein with an anomaly tyrosine kinase activity that promotes the characteristic proliferation of progenitor cells in CML and acute lymphoblastic lymphoma. The targeting of BCR-ABL1 fusion kinase is the first novel paradigm of molecularly targeted curing.

Immobilization of serum albumin on the synthesized three layers core–shell structures of super-paramagnetic iron oxide nanoparticles

R. Khatiri,A. Reyhani,S.Z. Mortazavi,M. Hossainalipour 한국공업화학회 2013 Journal of Industrial and Engineering Chemistry Vol.19 No.5

In this study, the synthesis of four layer structures coated on magnetite nanoparticles such that Fe3O4/SiO2/APTES/PEG/BSA was investigated. Magnetite nanoparticles were synthesized by co-precipitating Fe2+ and Fe3+ in an ammonia solution with the average size of 25 nm. To fabricate Fe3O4/SiO2 core–shells,the magnetite nanoparticles coated by silica with Stober method. The fabricated nanoparticles were treated by 3-aminopropyl-triethoxysilane to achieve Fe3O4/SiO2/APTES nanostructures. Moreover, the nanoparticles were also attached to reactive polyethylene glycol chains. Eventually, the nanoparticles activated with bovine serum albumin for bio-application. X-ray diffraction, transmission electron microscopy, Fourier transform infrared spectroscopy, UV–vis spectroscopy and vibrating sample magnetometer were used to support the characterization.

Catalytic-oxidation of Janus green in the presence of AgNPs: Application to the determination of iodate

S.S. Mortazavi,A. Farmany 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.6

Catalytic-oxidation of Janus green was made in the presence of AgNPs. The reaction was monitoredspectrophotometrically at 610 nm. The system was optimized for the trace analysis of iodate. Themethod is featured with good accuracy and reproducibility for iodate monitoring in real samples withoutany pre-concentration and separation step.