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Categorical Descriptions of Essence in the Views of Hegel and Avicenna

Seyed Amir Hosein Fazlollahi, Ali Moradkhani
2020 Ḥikmat-i sīnavī  
In the second part of Science of logic, the logic of essence, Hegel discussed categories with common characters. In fact, some of them are explanatory of modes of essence that Avicenna has already paid attention to. Focusing on the truth of being as modes of quiddity or essence, how to unite them in the external world, as well as the negative and reflective mode of essence pave the way to compare the issue with Avicenna's thoughts. There is no doubt that Hegel was influenced by the Aristotelian
more » ... – theological tradition. Topics such as attribution of existence to the essence and also plurality in essence are the consequences of the essence of negative and reflective mode. On the other hand, Hegel has transformed logic into metaphysics. Therefore, the significance of essence in metaphysics and their exclusion from the logic are common grounds in Avicenna and Hegel's thoughts.
doi:10.30497/ap.2020.75355 doaj:d18198bb858848f79d330560ae874c1e fatcat:oppzt724nbhr3f4eecuyz6bkyq

DOCK8deficiency in six Iranian patients

Shiva Saghafi, Zahra Pourpak, Franziska Nussbaumer, Mohammad Reza Fazlollahi, Massoud Houshmand, Amir Ali Hamidieh, Mohammad Hassan Bemanian, Mohammad Nabavi, Nima Parvaneh, Bodo Grimbacher, Mostafa Moin, Cristina Glocker
2016 Clinical Case Reports  
Key Clinical Message DOCK8 deficiency is a rare autosomal recessive combined immunodeficiency with high IgE level, eosinophilia, severe eczema, extensive cutaneous viral, and respiratory bacterial infections, mostly in populations with higher prevalence of consanguinity. Molecular diagnosis of this gene is a useful approach for early diagnosis and timely HSCT due to deleterious consequences.
doi:10.1002/ccr3.574 pmid:27398204 pmcid:PMC4891486 fatcat:du3xbiusznh2xmx2hwhuc7otkm

Liquid petroleum gas flame in a double-swirl gas turbine model combustor: Lean blow-out, pollutant, preheating

Amir Mardani, Rezapour Rastaaghi, Fazlollahi Ghomshi
2020 Thermal Science  
In this paper, lean blow-out (LBO) limits in a double swirl gas turbine model combustor were investigated experimentally for Liquid Petroleum Gas (LPG) fuel. The LBO curve was extracted for different combustor configurations. While burner could operate reasonably under ultra-lean conditions, two different sets of operating conditions, one with a low flow rate (LFR) and another one with high flow rate (HFR), are identified and studied in terms of LBO and pollutant. Results showed that while the
more » ... lame structure was similar in both cases, the chamber responses to geometrical changes and also preheating are minimal at the LFR. That means confinement and injector type have desirable effects on stability borders but not for the LFR. The channeled injector shifted down the LBO limit around 28 percent at HFR. Measurements on the combustor exhaust gas composition and temperature indicate a region with relatively complete combustion and reasonable temperature and a very low level of exhaust NOx pollutants (i.e., below ten ppm) at about 25-50% above the LBO. In this operating envelope, a burner power increment led to a higher exhaust average temperature and combustion efficiency, while NOx formation decreased. Preheating the inlet air up to 100 o C results in an improvement in burner stability in about 10 percent, but NOx production intensifies more than three times. Results indicate that the LBO limit is configured more by the burner design and aerodynamic aspects rather than the fuel type.
doi:10.2298/tsci190623139m fatcat:c5swswjlyzcjxp2egactyhuveq

Limited cerebral microbleeds effect on regional magnetic susceptibility measured by MRI

Amir Fazlollahi, Parnesh Raniga, Pierrick Bourgeat, Paul A Yates, Ashley I Bush, Olivier Salvado, Scott Ayton
2020 Alzheimer's & Dementia  
Cortical iron accumulation has been reported as a pathological feature of Alzheimer's disease (AD). The cause of cortical iron elevation in AD is unknown but may be contributed by hemosiderin deposits in cerebral microbleeds (CMBs) that frequently occur in this disease. In this study, we investigate the impact of CMBs (which are more frequent in AD) on the magnetic susceptibility of the surrounding brain tissue.
doi:10.1002/alz.044125 fatcat:54b4thipdfbenceevsoj6pjsvi

SHARQnet - Sophisticated Harmonic Artifact Reduction in Quantitative Susceptibility Mapping using a Deep Convolutional Neural Network [article]

Steffen Bollmann, Matilde Holm Kristensen, Morten Skaarup Larsen, Mathias Olsen, Mads Pedersen, Lasse Riis Ostergaard, Kieran O'Brien, Christian Langkammer, Amir Fazlollahi, Markus Barth
2019 bioRxiv   pre-print
Quantitative susceptibility mapping (QSM) reveals pathological changes in widespread diseases such as Parkinson's disease, Multiple Sclerosis, or hepatic iron overload. QSM requires multiple processing steps after the acquisition of magnetic resonance imaging (MRI) phase measurements such as unwrapping, background field removal and the solution of an ill-posed field-to-source-inversion. Current techniques utilize iterative optimization procedures to solve the inversion and background field
more » ... ction, which are computationally expensive and lead to suboptimal or over-regularized solutions requiring a careful choice of parameters that make a clinical application of QSM challenging. We have previously demonstrated that a deep convolutional neural network can invert the magnetic dipole kernel with a very efficient feed forward multiplication not requiring iterative optimization or the choice of regularization parameters. In this work, we extended this approach to remove background fields in QSM. The prototype method, called SHARQnet, was trained on simulated background fields and tested on 3T and 7T brain datasets. We show that SHARQnet outperforms current background field removal procedures and generalizes to a wide range of input data without requiring any parameter adjustments. In summary, we demonstrate that the solution of ill-posed problems in QSM can be achieved by learning the underlying physics causing the artifacts and removing them in an efficient and reliable manner and thereby will help to bring QSM towards clinical applications.
doi:10.1101/522151 fatcat:lvxiiqawyvg47ihqa4tm5u4wn4

Generative Model of Brain Microbleeds for MRI Detection of Vascular Marker of Neurodegenerative Diseases

Saba Momeni, Amir Fazlollahi, Leo Lebrat, Paul Yates, Christopher Rowe, Yongsheng Gao, Alan Wee-Chung Liew, Olivier Salvado
2021 Frontiers in Neuroscience  
., 2013; Fazlollahi et al., 2015; Roy et al., 2015) , including deep learning methods, achieving superior performance by increasing the sensitivity to 95.8 and reducing the number of false positives to  ... 
doi:10.3389/fnins.2021.778767 pmid:34975381 pmcid:PMC8716785 fatcat:czaic5widva3pcq5qchc4xu6tu

Cobb Angle Measurement Decision Support System of Radiography Images in Patients with Idiopathic Scoliosis

Nazila Moftian, Taha Samad Soltani, Zahra Salahzadeh, Hojjat Hossein Pourfeizi, Yousef Gheibi, Amir Fazlollahi, Peyman Rezaei Hachesu
2019 Iranian Journal of Radiology  
Fazlollahi 3 ; Peyman Rezaei Hachesu 1, *  ...  Measurement Decision Support System of Radiography Images in Patients with Idiopathic Scoliosis Nazila Moftian 1 ; Taha Samad-Soltany 1 ; Zahra Salahzadeh 1 ; Hojjat Hossein Pourfeizi 1 ; Yousef Gheibi 2 ; Amir  ... 
doi:10.5812/iranjradiol.99150 fatcat:utstwcdybzehllgbtjwxtazwqe

Comparison of Treatment Response in Different Types of Achalasia: A Long-Term Study

Seidamir Pasha Tabaeian, Amir Anushiravani, Narges Fazlollahi, Hossein Asl Soleimani, Javad Mikaeli
2021 Middle East Journal of Digestive Diseases  
BACKGROUND Three manometric patterns are seen in high-resolution manometry (HRM). Response to treatment has been reported to be different in these subtypes. We aimed to investigate the frequency and response to treatment in subtypes of achalasia. METHODS 306 patients between 15 to 60 years old, naïve to treatment with idiopathic achalasia (IA) were evaluated prospectively in a cohort study for 8 years. The patients were treated with pneumatic balloon dilation (PBD), and evaluated before and one
more » ... month after PBD with Achalasia Symptom Score (ASS) and timed barium esophagogram (TBE) and then every 6 months with ASS. The primary study outcome was defined as a reduction in ASS (equal to or less than 4) and a reduction greater than 80% in the volume of barium in TBE at 1 month after PBD compared with baseline values. RESULTS According to HRM, 57 were classified as type I (18.62%), 223 as type II (72.9%), and 26 as type III (8.5%). The mean lower esophageal sphincter (LES) residual pressures before treatment were 34.05 ± 31.55, 32.99 ± 17.90, and 37.47 ± 14.07 mmHg in types I, II, and III, respectively (p = 0.18). The mean ASS values before treatment were 12.23, 11.50, and 11.50, for types I, II, and III, respectively (p = 0.29). The ASS dropped to 2.50 in type I, 2.40 in type II, and 2.12 in type III at 1 month after treatment (p = 0.83). Eventually, at the end of follow-up, 24 patients with type I (83%), 82 patients with type II (67%), and five patients with type III (83%) showed sustained good responses (p = 0.528). CONCLUSION Manometric subtypes of achalasia did not have an important role in clinical success in the long term. Achalasia has no definite cure, but with current treatment modalities, palliation of symptoms is possible in over 90% of patients.
doi:10.34172/mejdd.2021.224 fatcat:mg3nmri2qbdxvmay2kf4lvjrw4

WHITE MATTER HYPERINTENSITIES, AMYLOID-β, AND RISK OF COGNITIVE DECLINE IN HEALTHY OLDER PEOPLE

Nawaf Yassi, Christa Dang, Amir Fazlollahi, Ying Xia, Rosie Watson, Paul Maruff, Olivier Salvado, Jurgen Fripp, Victor L. Villemagne, Christopher C. Rowe, Colin L. Masters
2019 Alzheimer's & Dementia  
. , AND RISK OF COGNITIVE DECLINE IN HEALTHY OLDER PEOPLENawaf Yassi 1,2 , Christa Dang 1 , Amir Fazlollahi 3 , Ying Xia 3 , Rosie Watson 2 , Paul Maruff 1,4 , Olivier Salvado 3 , Jurgen Fripp 5 , Victor  ... 
doi:10.1016/j.jalz.2019.06.907 fatcat:tvoa355fm5f27dyilawafdhkmy

Two cases of syndromic neutropenia with a report of novel mutation in G6PC3

Zahra Alizadeh, Mohammad Reza Fazlollahi, Payman Eshghi, Amir Ali Hamidieh, Mohsen Ghadami, Zahra Pourpak
2011 Iranian Journal of Allergy, Asthma and Immunology  
Severe congenital neutropenia (SCN) is a rare primary immunodeficiency. Different genes are found to be associated with SCN, including ELA2, HAX1, WAS, GFI1, G-CSFR. Also, recently G6PC3 as a rare gene in SCN has been reported. Patients with G6PC3 often have cardiac and/or urogenital malformations. Two patients with persistent severe neutropenia, recurrent infections and maturation arrest at promyelocyte-myelocyte stage in their bone marrow were assessed in this study. Both patients showed
more » ... tural heart disease and one of them also showed urogenital anomaly. Sequence analyses of G6PC3 in 2 patients revealed two different homozygous mutations, one in exon 6 (Asn 313 fs), and the other in exon 3 (Ser 139 Met), the latter is a new mutation which has not been reported in previous studies. It can be concluded that G6PC3 is one of the responsible gene for SCN in Iranian patients. Based on the results, a new mutation in G6PC3 observed in one patient.
pmid:21891829 fatcat:mfvuy6oem5e5hpn4xagf3wablm

Computer-aided Measurement System Using Image Processing for Measuring Cobb Angle in Scoliosis

Nazila Moftian, Taha Samad Soltani, Zahra Salahzadeh, Hojjat Hossein Pourfeizi, Yousef Gheibi, Amir Fazlollahi, Peyman Rezaei-Hachesu
2021 Middle East Journal of Rehabilitation and Health  
One of the spine deformities is scoliosis, and Cobb angle is generally used to assess it. Objectives: In this study, a computer-aided measurement system (CAMS) was presented as a new repeatable and reproducible approach to assess the Cobb angle in idiopathic scoliosis patients. Methods: Python libraries, including OpenCV and Numpy were used for image processing and design of the software. To assess the repeatability and reproducibility of the CAMS, a series of 98 anterior-posterior radiographs
more » ... rom patients with idiopathic scoliosis were used. Assessments were done by five independent observers. Each radiograph was assessed by each observer three times with a minimum break of two weeks among assessment. The single measure intraclass correlation coefficient (ICC), the mean absolute difference (MAD), and the standard error measurement (SEM) values were used for intra- and inter-observer reliability. Results: The inter-observer analysis indicated that the ICCs ranged from 0.94 - 0.99, and the MAD between manual and CAMS were less than 3°. For intra-observer measurements, the combined SEM between all observers for the manual and CAMS was 1.79° and 1.27°, respectively. An ICC value of 0.97 with 95% confidence interval (CI) was excellent in CAMS for inter-observer reliability. The MAD of CAMS was 2.18 ± 2.01 degrees. Conclusions: The CAMS is an effective and reliable approach for assessing scoliotic curvature in the standing radiographs of thoraco-lumbar. Moreover, CAMS can accelerate clinical visits, and its calculation results are reliable.
doi:10.5812/mejrh.111360 fatcat:t6e45svpgbd3tocgjr4cd7pxb4

Efficient machine learning framework for computer-aided detection of cerebral microbleeds using the Radon transform

Amir Fazlollahi, Fabrice Meriaudeau, Victor L. Villemagne, Christopher C. Rowe, Paul Yates, Olivier Salvado, Pierrick Bourgeat
2014 2014 IEEE 11th International Symposium on Biomedical Imaging (ISBI)  
Fazlollahi, F. Meriaudeau, V.  ... 
doi:10.1109/isbi.2014.6867822 dblp:conf/isbi/FazlollahiMVRYSB14 fatcat:lubudmldtnd2dgcqpgzykgqlwq

Automatic detection of small spherical lesions using multiscale approach in 3D medical images

Amir Fazlollahi, Fabrice Meriaudeau, Victor L. Villemagne, Christopher C. Rowe, Patricia M. Desmond, Paul A. Yates, Olivier Salvado, Pierrick Bourgeat
2013 2013 IEEE International Conference on Image Processing  
Automated detection of small, low level shapes such as circular/spherical objects in images is a challenging computer vision problem. For many applications, especially microbleed detection in Alzheimer's disease, an automatic pre-screening scheme is required to identify potential seeds with high sensitivity and reasonable specificity. A new method is proposed to detect spherical objects in 3D medical images within the multi-scale Laplacian of Gaussian framework. The major contributions are (1)
more » ... reaking down 3D sphere detection into 1D line profile detection along each coordinate dimension, (2) identifying center of structures by normalizing the line response profile and (3) employing eigenvalues of the Hessian matrix at optimum scale for the center points to determine spherical objects. The method is validated both on simulated data and susceptibility weighted MRI images with ground truth provided by a medical expert. Validation results demonstrate that the current approach has higher performance in terms of sensitivity and specificity and is effective in detecting adjacent microbleeds, with invariance to intensity, orientation, translation and object scale.
doi:10.1109/icip.2013.6738239 dblp:conf/icip/FazlollahiMVRDYSB13 fatcat:prciett5gne3jbzjvvqg2jdzyi

Amyloid angiopathy may contribute to white‐matter hyperintensities in Alzheimer's disease

Ying Xia, Amir Fazlollahi, Paul A. Yates, Nawaf Yassi, Patricia M. Desmond, Olivier Salvado, Victor L.L. Villemagne, Christopher C. Rowe, Jurgen Fripp, Colin L. Masters, Parnesh Raniga
2020 Alzheimer's & Dementia  
Cerebral amyloid angiopathy (CAA) is characterised by the accumulation of amyloid-b (Aβ) in cerebral vessels and is often coexistent with Alzheimer's disease (AD). However, the overlap between CAA and AD and the contribution of CAA pathology to cerebrovascular lesions are not well understood. We hypothesize that in subjects with high Aβ load, the presence of imaging markers of CAA would be associated with greater white matter hyperintensities (WMH) burden. Method: Data used in the preparation
more » ... this article was obtained from the Australian Imaging Biomarkers and Lifestyle flagship study of ageing (AIBL). See www.aibl.csiro. au. We analysed MRI (SWI and FLAIR) and 11C-PiB-PET data from 98 cognitively nor-
doi:10.1002/alz.038899 fatcat:syzs4h77pzehtljwyudgjmncaa

Leukocyte Adhesion Deficiency Type I: The Outcome of Reduced-Intensity Conditioning Hematopoietic Stem Cell Transplantation

Amir Ali Hamidieh, Zahra Pourpak, Maryam Behfar, Sara Faghihi-Kashani, Mohammad Reza Fazlollahi, Ashraf sadat Hosseini, Mostafa Moin, Ardeshir Ghavamzadeh
2015 Biology of Blood and Marrow Transplantation  
doi:10.1016/j.bbmt.2014.11.343 fatcat:k4smcpkciffbvkkoll25e64gu4
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