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Neighborhoods of p-valent functions
Hesam Mahzoon,S. Latha 장전수학회 2013 Proceedings of the Jangjeon mathematical society Vol.16 No.1
In this paper, we the new subclasses of p - valent functions of complexorder denoted by Hpn,m(q, λ, b), Lpn,m(q, λ, b; μ), Hp,n,m(q, λ, b) and Lp,n,a,m(q, λ, b; μ)are introduced. Further for functions belonging to these classes, certain propertiesof neighborhoods are studied.
Hesam Komari Alaei,Alireza Yazdizadeh 제어·로봇·시스템학회 2018 International Journal of Control, Automation, and Vol.16 No.3
This paper deals with a robust sliding mode descriptor observer for estimation of states and reconstruction of actuator and sensor faults simultaneously in the presence of uncertainties, measurement noise and output disturbances. In the proposed method, the well-known H∞ concepts are used for minimizing the effects of the uncertainty in the estimation of the states and reconstruction of the faults by using the Linear Matrix Inequalities (LMIs). By considering the sensor fault and output disturbance as auxiliary state vectors, an augmented system is established. As a case study, an industrial boiler is considered and the proposed robust observer illustrates the robust performance on estimation of its states and reconstruction of its faults in the presence of uncertainties.
Million Visual Analogue Scale Questionnaire: Validation of the Persian Version
Hesam Akbari,Mohammad Ghasemi,Taha Yegani,Mohammad Gholami- Fesharaki, PhD,Maryam Saraei,Yalda Barsam,Hamed Akbari 대한척추외과학회 2019 Asian Spine Journal Vol.13 No.2
Study Design: Descriptive cross-sectional study. Purpose: To validate the Persian version of the Million Visual Analogue Scale Questionnaire (MVAS), a self-administered low back pain (LBP) questionnaire. Overview of Literature: The majority of LBP questionnaires translated into Persian evaluate the impact of LBP on daily living. The MVAS is one of the most commonly used self-administered LBP questionnaires, and was developed to assess a different direction and effect of activities of daily living on LBP intensity. Methods: The questionnaire was translated into Persian with the forward-backward method and was administered to 150 patients randomly sampled from an occupational medicine clinic in Tehran in 2017. Results: Cronbach’s alpha for all subscales ranged between 0.670 and 0.799. Confirmatory factor analysis showed adequate construct validity of the Persian version of the MVAS, with root mean square error of approximation 0.046, goodness of fit index 0.902, and comparative fit index 0.969. Other indexes were satisfactory. Conclusions: The Persian MVAS is a valid and reliable instrument that can assess the effect of various daily activities on the intensity of LBP.
NEIGHBORHOODS OF p -VALENT FUNCTIONS
HESAM MAHZOON,S. LATHA 장전수학회 2010 Advanced Studies in Contemporary Mathematics Vol.20 No.1
In this paper, we the new subclasses of p - valent functions of complex order denoted byHp n,m(q, ⋋, b),Lpn,m(q, ⋋,b; μ),Hp,a,n,m(q, ⋋, b) and Lp,a,n,m(q, ⋋, b; μ)are introduced. Further for functions belonging to these classes, certain properties of neighborhoods are studied
Hesam Maleki,Mohammad Kazemeini,Afsaneh S. Larimi,Farhad Khorasheh 한국공업화학회 2017 Journal of Industrial and Engineering Chemistry Vol.47 No.-
CaO–La2O3 mixed oxides were synthesized by co-precipitation coupled with Li doping through wetimpregnation. These were used as catalysts for transesterification of canola oil and methanol towardbiodiesel production. To determine the structure and morphology of the prepared catalysts, they werecharacterized by the XRD, FESEM, BET, and basic strength measurements. Under optimum reactionconditions of methanol/oil molar ratio of 15:1, 5 wt% catalyst at 65 C, 96.3% conversion was obtained in2.5 h of reaction duration. Moreover, the catalyst demonstrated a rather high stability where reuse of uptofive cycles without significant loss of performance observed.
Fiber optic engine for micro projection display
Arabi, Hesam Edin,An, Sohee,Oh, Kyunghwan The Optical Society 2010 Optics express Vol.18 No.5
<P>A novel compact optical engine for a micro projector display is experimentally demonstrated, which is composed of RGB light sources, a tapered 3 x 1 Fiber Optic Color Synthesizer (FOCS) along with a fiberized ball-lens, and a two dimensional micro electromechanical scanning mirror. In the proposed optical engine, we successfully employed an all-fiber beam shaping technique combining optical fiber taper and fiberized ball lens that can render a narrow beam and enhance the resolution of the screened image in the far field. Optical performances of the proposed device assembly are investigated in terms of power loss, collimating strength of the collimator assembly, and color gamut of the output.</P>
On Coefficients of a Certain Subclass of Starlike and Bi-starlike Functions
Mahzoon, Hesam,Sokol, Janusz Department of Mathematics 2021 Kyungpook mathematical journal Vol.61 No.3
In this paper we investigate a subclass 𝓜(α) of the class of starlike functions in the unit disk |z| < 1. 𝓜(α), π/2 ≤ α < π, is the set of all analytic functions f in the unit disk |z| < 1 with the normalization f(0) = f'(0) - 1 = 0 that satisfy the condition $$1+\frac{{\alpha}-{\pi}}{2\;sin\;{\alpha}}<Re\{\frac{zf^{\prime}(z)}{f(z)}\}<1+\frac{{\alpha}}{2\;sin\;{\alpha}}\;(z{\in}{\Delta})$$. The class 𝓜(α) was introduced by Kargar et al. [Complex Anal. Oper. Theory 11: 1639-1649, 2017]. In this paper some basic geometric properties of the class 𝓜(α) are investigated. Among others things, coefficients estimates and bound are given for the Fekete-Szegö functional associated with the k-th root transform [f(z<sup>k</sup>)]<sup>1/k</sup>. Also a certain subclass of bi-starlike functions is introduced and the bounds for the initial coefficients are obtained.
Mohammad Hesam Hafezi,Naznin Sultana Daisy,Lei Liu,Hugh Millward 서울시립대학교 도시과학연구원 2019 도시과학국제저널 Vol.23 No.4
Large universities can be considered as special trip generators requiring special Traffic Demand Management (TDM) policies. Due to their unique accessibility, mixed land-use, and welcoming environment for alternative modes, they are well placed to promote active transportation, carpooling, parking management, and shuttle buses. These have direct effects on regional traffic, as well as on the total vehicular emissions of Greenhouse Gases (GHG) and other pollutants. This paper estimates transport-related pollution emissions for university population segments at Dalhousie University, Nova Scotia, comprising undergraduate-students, graduate students, faculty members, and staff. The data used for this study are derived from the Environmentally Aware Commuter Travel Diary Survey (EnACT) conducted in spring 2016. Initially, we generate a 100% synthetic population for the entirety of university commuters. Then, we model transport-related polluting emissions, including carbon dioxide (CO2), carbon monoxide (CO), nitrogen oxide (NOx), particulate matter (PM10 and PM2.5), total hydrocarbon (THC), and volatile organic compounds (VOC), based on the population features and their living zones in relation to campus areas. In this study, five zones are described for emission estimation: on-campus, inner city, suburban area, inner commuter belt, and outer commuter belt. In addition, two emission scenarios are tested, which consider the impacts of changes to transit ridership and auto driving. These scenarios demonstrate how changing the primary travel mode can greatly influence emissions volume. The empirical models provide useful insights that can be utilized to improve TDM policies of university campuses, as well as to analyze environmental mitigation scenarios.
Seyed Hesam-Aldin Samaei,Gholamreza Bakeri,Mohammad Soleimani Lashkenari 한국화학공학회 2022 Korean Journal of Chemical Engineering Vol.39 No.2
Proton transfer is the most important task of proton exchange membranes (PEMs) for application in fuel cells. One vital disadvantage of currently used commercial Nafion membranes is the low proton conductivity at high temperatures. Therefore, the objective of this research was to increase the proton conductivity of PEMs based on sulfonated poly (ether ether ketone) (SPEEK). Herein, modification of SPEEK-based PEM was carried out using polydopamine- coated halloysite nanotubes (HNT) alone and in combination with sulfonated polystyrene (SPS) and phosphotungstic acid (PWA). In this method, poly (ether ether ketone) sulfonation process was performed under optimum operating conditions to create more sulfonic acid groups on its chains. Here, polydopamine was doped on the outer surface of HNT (DHNT) and employed as the additive to create additional proton transferring pathways in the membrane. The hydrophilicity of the modified nanotube was enhanced through silanization (named as DHNTS). Moreover, SPS and PWA were applied to improve the ability of protons to transfer through the proton barrier channels in the membrane. Performing the sulfonation of polystyrene in the solution phase was a novel approach in this study, which led to significant increase in the degree of sulfonation. The results showed that the SPEEK/DHNTS|SPS and SPEEK/DHNTS|PWA membranes in the presence of 15% weight ratio additives and 100% relative humidity exhibited 109% and 90% higher proton conductivity than the neat SPEEK membrane, respectively. Furthermore, 20% and 10% higher proton conductivity was observed for the aforementioned membranes compared to the commercial Nafion117 membrane. Because of the strong acid-base bonding between DHNTS and SPEEK and the sticky nature of polydopamine, the chemical stability of the modified PEMs was higher than the neat membrane. In terms of fuel cell performance, there was little difference between Nafion117 membrane and DHNTS-modified PEM. These modified membranes are therefore suitable alternatives to address the commercial Nafion membrane’s gap in the fuel cells.