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Search Results: 1 - 10 of 225 matches for " Hooman Jaladat "
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Management of Peyronie's Disease by Dermal Grafting
Mohammad Reza Nikoobakht,Abdolrasoul Mehrsai,GH Pourmand,Hooman Jaladat
Urology Journal , 2004,
Abstract: Purpose: To evaluate the results of plaque excision and dermal grafting in Peyronie’s disease. Materials and Methods: Twenty seven patients were scheduled to undergo plaque excision and dermal grafting for Peyronie’s disease. Potency, bending of erected penis, and having painful erection were evaluated in patients before and after operation. To evaluate erectile dysfunction, we used International Index of Erectile Function (IIEF) by interviewing the patients and filling questionnaires by their partners. Doppler ultrasonography was used to determine the vascular competence of penis before and after operation in 15 patients. Results: The disease was more prevalent between the ages of 40 and 60 years. Plaques were located as follows: dorsal in 18, right lateral in 6 and left lateral in 3. Mean plaque size was 11 (range 5 to 18) mm. After plaque excision and dermal grafting, penile deformity, erectile dysfunction, and painful erection had remained yet in 4 (15%) out of 27, 3 (16%) out of 19, and 3 (14%) out of 22, respectively. Doppler ultrasonographic study in 15 patients revealed improvement in peak systolic velocity (P < 0.01). In addition, a decrease in end diastolic velocity was noted also that was not significant statistically (P = 0.26). Resistive index did not improve after operation. Conclusion: This procedure showed significant improvement in penile deformity (85% of cases), erectile dysfunction (84% of cases) and painful erection (86% of cases). We recommend plaque excision and dermal grafting as an effective procedure in treating Peyronie’s disease.
Drilling Operation and Formation Damage  [PDF]
Hooman Fallah, Sara Sheydai
Open Journal of Fluid Dynamics (OJFD) , 2013, DOI: 10.4236/ojfd.2013.32005

Transport of particle suspensions in oil reservoirs is an essential phenomenon in many oil industry processes. Solid and liquid particles dispersed in the drilling fluid (mud) are trapped by the rock (porous medium) and permeability decline takes place during drilling fluid invasion into reservoir resulting in formation damage. The formation damage due to mud filtration is explained by erosion of external filter cake. Nevertheless, the stabilization is observed in core floods, which demonstrates internal erosion. A new mathematical model for detachment of particles is based on mechanical equilibrium of a particle positioned on the internal cake or matrix surface in the pore space. In the current work the analytical solution obtained to mud filtration with one particle capture mechanism with damage stabilization. The particle torque equilibrium is determined by the dimensionless ratio between the drag and normal forces acting on the particle. The maximum retention function of the dimensionless ratio closes system of governing equations for colloid transport through porous medium.

An Exploration on the Effective Factors of Tourism Industry on Protection of the Environment in the Historical City Ghoumas  [PDF]
Hooman Mesgarian, Leili Alaei
Open Journal of Ecology (OJE) , 2014, DOI: 10.4236/oje.2014.49048

According to the world tourism organization (WHO) in 2005, the number of tourists has increased up to 36 times. In a way that it has maximized from 25 million in 1950 to 1018 million in 2010. The sustainable tourism, thus, because of making a balance between different environmental, economic, cultural and social dimensions of the tourism development, plays a considerable role in protection of species diversity, and benefits the tourism activists in order to reduce its destructive impact on the environment and the local cultures and being kept for the future generations. Accordingly, the present research first examines the relationship between tourism, sustainable development and the ecology, for measurement of different aspects of the industry effect on the environment. Secondly, the present study uses from some parameters like the average monthly minimum and maximum temperatures, the average relative humidity, the average maximum and minimum temperatures in day and at night in the Semnan station as well as using the common diagram in the experimental methods like Olegi to assess day and night Climatourism in the region. Finally, on the basis of the performed analysis, the strengths and weak points of tourist attractions for the protection of the environment are considered.

Climatic Effects on the Formation and Function of Architectures Based on the Climate in Semnan Province, Iran  [PDF]
Saeid Kamyabi, Hooman Mesgarian
Open Journal of Ecology (OJE) , 2014, DOI: 10.4236/oje.2014.49044

Semnan province is one of the vast provinces of the country that has a variety of topographical and clamatorial conditions. This province plays a key role in industrial, agricultural and animal husbandry activities. The study of its climate potential with respect to its natural limitations like lack of water resources, soil types, droughts and desertification problems has been considered as a necessity in the province annual planning. In this study, the climatic regionalization of the province is done through using empirical and quantitative methods on climatic data of meteorological stations of the area in statistical period of 1982-2005. Methods of Koppen empirical, De Martonne, Emberger and Dr Karimi have divided the province into 3, 2, 4 and 6 climactic types, respectively. Using principle components and the cluster analysis on 14 climatic elements of 21 stations, 5 climatic types have been specified for the province. Based on this method, temperature, its Diurnal Temperature Range (DTR), precipitation and its type, and humidity contribute a great deal to the climate of the Semnan Province. The main results of this identification of 5 climatic types include hot & dry, dry & hot semi-dry, dry & cold semi-dry, mountainous, and Caspian climate.

A Probabilistic Analysis on the Harmonic Cancellation Characteristics of the Scott Transformer  [PDF]
Hooman Erfanian MAZIN, Joey GALLANT
Journal of Electromagnetic Analysis and Applications (JEMAA) , 2010, DOI: 10.4236/jemaa.2010.21003
Abstract: The Scott transformer is widely used in electric railway systems when there are two unbalanced single-phase loads as this transformer can reduce unbalance currents. This paper investigates whether or not the Scott transformer can also reduce harmonic current. Our study shows that it can reduce the harmonic current when single-phase loads have identical harmonic characteristics. This harmonic reduction occurs through the cancellation of harmonic currents of single-phase loads in the transformer windings. Our studies also show that there is some degree of cancelation even when the loads do not have identical harmonic characteristics. The cancellation depends on load balance factor and harmonic order.
The Little Randall-Sundrum Model at the LHC
Davoudiasl, Hooman
High Energy Physics - Phenomenology , 2008,
Abstract: We present a predictive warped model of flavor, cut off at an ultraviolet scale O(10^3) TeV, called the "Little Randall-Sundrum (LRS)" model. This model corresponds to a volume-truncation, by a factor y \approx 6, of the RS scenario and is holographically dual to dynamics with number of colors larger by y. With separate gauge and flavor dynamics, several unwanted contributions to precision electroweak, Z b \bar b, and flavor observables are suppressed in the LRS framework, compared with the corresponding RS case. The LRS truncation leads to a significant enhancement of the clean (golden) di-lepton LHC signals, by O(y^3).
Constraining Unparticle Physics with Cosmology and Astrophysics
Davoudiasl, Hooman
High Energy Physics - Phenomenology , 2007, DOI: 10.1103/PhysRevLett.99.141301
Abstract: It has recently been suggested that a scale invariant "unparticle" sector with a non-trivial infrared fixed point may couple to the Standard Model (SM) via higher dimensional operators. The weakness of such interactions hides the the unparticle phenomena at low energies. We demonstrate how cosmology and astrophysics can place significant bounds on the strength of unparticle-SM interactions. We also discuss the possibility of a having a non-negligible unparticle relic density today.
Taxonomy of Trypanosoma cruzi: a commentary on characterization and nomenclature
Momen Hooman
Memórias do Instituto Oswaldo Cruz , 1999,
Memórias 2000
Momen Hooman
Memórias do Instituto Oswaldo Cruz , 2000,
Momen Hooman
Memórias do Instituto Oswaldo Cruz , 1999,
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