Comparative evaluation of performance measures for human driving skills

Haghighi ,Osgouei, R.,Lee, H.,Choi, S. SPRINGER SCIENCE + BUSINESS MEDIA 2013 INTELLIGENT SERVICE ROBOTICS Vol.6 No.4

PREDICTION OF THERMAL CONDUCTIVITY OF R32, R125, R134a, R143a AND R152a AT ZERO DENSITY VIA SEMI-EMPIRICALLY-BASED ASSESSMENT

BEHZAD HAGHIGHI,FATEMEH HEIDARI,BEHNOUD HAGHIGHI,MOHAMMAD MEHDI PAPARI,BEHRAD HAGHIGHI 대한설비공학회 2011 International Journal Of Air-Conditioning and Refr Vol.19 No.1

The robust and efficient procedure is presented to calculate the transport properties, especially thermal conductivity coefficients, for gaseous state of difluoromethane (R32), pentafluoroethane (R125), 1, 1, 1, 2 tetrafluoroethane (R134a), 1, 1, 1 trifluoroethane (R143a) and 1, 1 difluoroethane (R152a) at zero density. The McLinden et al.'s^1 approach of the extended corresponding states has been used for calculating the contribution of molecular degree of freedom to the thermal conductivity of these refrigerants. The Lennard–Jones 12-6 (LJ 12-6) potential energy function is used as the initial model potential required by the technique. The interaction potential energies from the inversion procedure reproduce the thermal conductivity coefficients commensurate to the best measurements.

Oxaliplatin, 5-Fluorouracil and Leucovorin (FOLFOX-4) as First Line Chemotherapy in Elderly Patients with Advanced Gastric Cancer

Haghighi, Shirin,Kasbkar, Hadi,Esmaeilpour, Keihan,Yasaei, Mehrdad Asian Pacific Journal of Cancer Prevention 2016 Asian Pacific journal of cancer prevention Vol.17 No.7

Background: Gastric cancer is considered the fourth most common cancer and second most common cause of cancer-related mortalities worldwide. Gastric cancer develops more frequently among elderly. The oxaliplatin/5FU/leucovorin (FOLFOX) regimen has shown a notable activity against gastric cancer. Aim: To evaluate the responses and complications of FOLFOX-4 regimen as first line chemotherapy in elderly patients with advanced gastric cancer. Materials and Methods: From October 2014 to November 2015, a total of 21 patients with metastatic or local AGC (advanced gastric cancer) were analyzed. All patients were administered a FOLFOX-4 regimen consisting of a 2h infusion of oxaliplatin $85mg/m^2$ (day 1), continuous infusion of $1000mg/m^2$ 5-Fu in 24h., and leucovorin $200mg/m^2$ in 2h infusion as a first-line chemotherapy. Results: A total of 18 patients were assessable for efficacy and toxicity. One of 18 patients achieved a complete response, and 12 had partial responses, giving an overall response rate of 72.6%. Three (16%) patients demonstrated stable disease and 2 (12%) progression. The median progression free survival was 7.3 months, and the median overall survival was 11.9 months. One patient had grade 3 neuropathy. No other grade 3 or 4 NCI-CTC were seen. Conclusions: The FOLFOX-4 regimen used in our study was both active and acceptable for AGC in elderly patients as neoadjuvant and main therapy.

Reliability Estimation from Linear Degradation and Failure Time Data With Competing Risks Under a Step-Stress Accelerated Degradation Test

Haghighi, Firoozeh,Suk Joo Bae Institute of Electrical and Electronics Engineers 2015 IEEE transactions on reliability Vol. No.

<P>The accelerated degradation test (ADT) has become critical for product reliability assessment. In performing the ADT for newly developed products, a constant-stress ADT may be impractical or sometimes impossible where the available size of testing units and the testing duration are heavily bounded to meet the short development period of the products. As an alternative, a step-stress accelerated degradation test (SSADT) can be a useful tool for satisfying the test limitation, and for making up for uncertainty in selecting appropriate levels of stress. Occasionally, the elevated stress under SSADT not only accelerates the performance degradation of products, but it may also expedite traumatic failures. This paper proposes a modeling approach to simultaneously analyze linear degradation data and traumatic failures with competing risks in an SSADT experiment. Under the modeling approach, a cumulative exposure model is considered. The failure rate corresponding to each failure mode is described as a function of the degradation level at the moment of failure. No parametric assumptions are made regarding the failure-time distribution to extend the proposed method to more general cases. We derive maximum likelihood estimates of the model parameters, then estimate failure rates and product reliability based on the degradation level to failure. Asymptotic properties of the maximum likelihood estimates are also discussed. The proposed model is applied to accelerated degradation data from plastic substrate active matrix light-emitting diodes (AMOLEDs), along with sensitivity analysis.</P>

A modeling study on utilizing SnS₂ as the buffer layer of CZT(S, Se) solar cells

Haghighi, Maryam,Minbashi, Mehran,Taghavinia, Nima,Kim, Dae-Hwan,Mahdavi, Seyed Mohammad,Kordbacheh, Amirhossein Ahmadkhan Elsevier 2018 SOLAR ENERGY -PHOENIX ARIZONA THEN NEW YORK- Vol.167 No.-

<P><B>Abstract</B></P> <P>CdS is conventionally used as the n-type buffer layer in chalcopyrite (CIG(S, Se)) and Kesterite (CZT(S, Se)) solar cells. CdS is toxic and there are wide attempts to find substitutes for it. Here, we suggest SnS<SUB>2</SUB> as a possible alternative. SnS<SUB>2</SUB> films were deposited by pulsed laser deposition (PLD), characterized to estimate carrier concentration and electron affinity values, and the obtained values were used to model a CZT(S, Se) solar cell. The experimental values of a benchmark CZT(S, Se) cell with efficiency of 12.3% were employed to obtain the density and energy position of defects in CZT(S, Se) and validating the model. We observed that SnS<SUB>2</SUB> results in almost identical performance as CdS, showing slightly better current density, due to smaller conduction band offset of 0.21 eV compared to 0.28 eV for CdS.</P> <P><B>Highlights</B></P> <P> <UL> <LI> CZT(S, Se) solar cell is modeled with vertically graded absorber composition based on experimental data. </LI> <LI> The non-toxic and inexpensive SnS<SUB>2</SUB> has been introduced as a new buffer layer and appropriate alternative for CdS. </LI> <LI> The measured conduction and valence band positions of PLD grown SnS<SUB>2</SUB> layers are 4.26 eV and 6.11 eV. </LI> <LI> SnS<SUB>2</SUB> compares well with CdS as the buffer layer of CZT(S, Se) solar cells. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>

Role of Endoscopic Ultrasound in Evaluation of Pancreatic Neuroendocrine Tumors - Report of 22 Cases from a Tertiary Center in Iran

Haghighi, Shirin,Molaei, Mahsa,Foroughi, Forough,Foroutan, Mojgan,Dabiri, Reza,Habibi, Effat,Alizadeh, Amir Houshang Mohammad Asian Pacific Journal of Cancer Prevention 2012 Asian Pacific journal of cancer prevention Vol.13 No.9

Background: The pancreatic neuroendocrine tumor (pNET) is relatively rare and generally felt to follow an indolent course. EUS has an important role in detection of pNET. This is a review of clinical and radiological presentation and pathologic reports of 22 patients with pNET. Patients and methods: In this study we analyzed clinical and radiological presentations and pathologic reports of all relevant cases who were referred to Taleghani hospital for 3 years since 2008. Results: A total of 22 patients 28-74 years old (mean=49) were enrolled between 2008 and 2011. Among the total, 13 (59%) were male, 9 (41%) were female and 16 (72.7%) had functional tumors. The results of CT were negative in 12 (54%) cases but EUS was capable of detecting the lesions in these patients, cysts being found in 4 (19%) patients. Conclusion: EUS is a highly sensitive procedure for the localization of functional pNETs and especially insulinomas. Nonfunctional tumors were detected in more advanced and late stages and cystic lesions were more common in this group.

Development of a Library of Feature Fitting Algorithms for CMMs

Payam Haghighi,Prashant Mohan,Jami J.Shah,Joseph K. Davidson 한국정밀공학회 2015 International Journal of Precision Engineering and Vol. No.

Conformance of a manufactured feature to the applied geometric tolerances is done by analyzing the point cloud that is measured on the feature. To that end, a geometric feature is fitted to the point cloud and the results are assessed to see whether the fitted feature lies within the specified tolerance limits or not. Coordinate Measuring Machines (CMMs) use feature fitting algorithms that incorporate least square estimates as a basis for obtaining minimum, maximum, and zone fits. However, it is well known that results obtained from different vendors for the same data set often do not agree. This may be because of different interpretations of the GD&T standards, or the use of least squares algorithms as the basis for all fitting. Therefore, a reference or normative comprehensive library of algorithms addressing the fitting procedure (all datums, targets) for every tolerance class is needed. The library is specific to feature fitting for tolerance verification. This paper addresses linear, planar, circular, and cylindrical features only. This set of algorithms described conforms to the international Standards for GD&T. In order to reduce the number of points to be analyzed, and to identify the possible candidate points for linear, circular and planar features, 2D and 3D convex hulls are used. For minimum, maximum, and Chebyshev cylinders, geometric search algorithms are used. Algorithms are divided into three major categories: least square, unconstrained, and constrained fits.

Effect of Cucumber Mycorrhiza Inoculation under Low and High Root Temperature Grown on Hydroponic Conditions

Maryam Haghighi,Maryam Mozafariyan,Behzad Abdolahipour 한국작물학회 2015 Journal of crop science and biotechnology Vol.18 No.2

Cucumber is a subtropical vegetable sensitive to high and low root temperature. Additionally, mycorrhiza with beneficial effect on plant growth can increase plant tolerance to stress. This experiment was carried out as a factorial design based on CRD to study the effect of mycorrhiza density (0, 1,000 spores and 2,000 spores) on cucumber (Cucumis sativus cv. Super N3) under low (15°C), high (35°C), and optimum (25°C) temperature root zones. The result showed that low and high root zone temperatures decreased shoot and root fresh weight, chlorophyll content, and antioxidant activity compared to optimum temperature, while the phenols of shoot and NR activity increased in low and high temperature, respectively, as compared to optimum temperature. Both mycorrhiza inoculation (1,000 and 2,000 spores) increased shoot and root fresh weight while mycorrhiza with 1,000 spores increased antioxidant activity and phenol content and NR activity had no influence by mycorrhiza symbiosis. Mycorrhiza inoculation increased SPAD value at optimum temperature. FV/FM reduced by mycorrhiza with 2,000 spores at low and high temperature stress. Total phenol content increased at all temperature levels by mycorrhiza inoculation. Mycorrhiza with 1,000 spore increased antioxidant activity of leaves at all root zone temperatures. NR activity increased with both mycorrhiza inoculation at optimum temperature and decreased at high root zone temperatures. In general, our results showed that mycorrhiza symbiosis had a desirable effect on cucumber culture at low and high root zone temperatures.

The Effect of Carbon Nanotubes on the Seed Germination and Seedling Growth of Four Vegetable Species

Maryam Haghighi,Jaime A. Teixeira da Silva 한국작물학회 2014 Journal of crop science and biotechnology Vol.17 No.4

Carbon nanotubes (CNTs) can change the morphological and physiological characteristics of plant cells. Laboratory and greenhousestudies were conducted to study the effect of CNTs on the germination and seedling growth of tomato (Lycopersicum esculentumMill. cv. ‘Falcato’), onion (Allium cepa L. cv. ‘Yellow Sweet Spanish’), turnip (Brassica rapa L. cv. ‘Toria’) and radish(Raphanus sativus L. cv. ‘Small radish’). Seeds were germinated in four concentrations of CNTs (0, 10, 20 and 40 mg L-1) in Petridishes under laboratory conditions. The same concentrations were used in a greenhouse to study the response of seedling growth toCNTs. To evaluate the effect of CNTs on germination and growth, germination percentage (GP), germination rate (GR), seedlinglength, seedling fresh and dry weight and mean germination time (MGT) were measured. Scanning electron microscopy (SEM) wasused to confirm the presence of CNTs. CNTs at 10 - 40 mg L-1 improved tomato and onion germination more than for radish andturnip, the highest GP in tomato and onion being 8 and 95%, respectively. In radish, the control showed the highest GP (96%) underlaboratory conditions. CNTs at 40 mg L-1 had a deleterious and toxic effect on onion and radish seed germination. In the greenhouseexperiment, the fresh weight of radish seedlings decreased as the CNT concentration increased. The dry weight of tomato and radishshoots increased following the application of all concentrations (10 - 40 mg L-1) of CNTs. CNTs did not alter turnip germination andgrowth. SEM revealed that the effectiveness of CNTs may depend on the plant species and on the distribution of CNTs on the testaand root surface. CNTs thus provide a viable and important new technique to improve seed germination and selective seedlinggrowth-related characteristics, although the benefit-toxic balance needs to be tested for other horticultural crops and other (higher)concentrations of CNTs.

Effects of Decay Level of SMC (Spent Mushroom Compost), Media Diameter and Compound on Turfculture in Hydro-Mulching Method

Maryam Haghighi poudeh,Mohsen Kafi,Ali Tehranifar,Ali Nikbakht,Yiping Xia 한국원예학회 2006 한국원예학회 기타간행물 Vol.- No.-