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Role of pancreatic juice cytology in diagnosis of high-grade pancreatic intraepithelial neoplasia

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World Journal of Clinical Cases 2025年第10期13卷 59-61页

作者： Hussein hassan Okasha Mohammed Tag-Adeen Hossam Eldin Shaaban Division of Gastroenterology and Hepatology Department of Internal MedicineKasr Al-Aini School of MedicineCairo UniversityCairo 11562Egypt Division of Gastroenterology and Hepatology Department of Internal MedicineQena Faculty of MedicineSouth Valley UniversityQena 83523Egypt Department of Internal Medicine and Gastroenterology National Hepatology and Tropical Medicine Research InstituteCairo 11796Egypt

High-grade pancreatic intraepithelial neoplasia is a challenging diagnosis and itdoes not exhibit mass lesions. It is suspected based on changes in the mainpancreatic duct in magnetic resonance cholangiopancreatography. Sometimesonly an unclear duct shows in magnetic resonance cholangiopancreatographywith no focal strictures and upstream dilatation of the main pancreatic duct. Serialpancreatic juice cytology is valuable in diagnosis of those patients.

关键词： High-grade pancreatic intraepithelial neoplasia Pancreatic cancer Magnetic resonance cholangiopancreatography Endoscopic retrograde pancreatography Pancreatic juice cytology Pancreatic ductal adenocarcinoma

Comparative study of living donor kidney transplants:Right vs left

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World Journal of Transplantation 2025年第1期15卷 115-123页

作者： Taqi Khan Nadeem Ahmad Qaisar Iqbal Muneeb hassan Lajward Asnath Naveed Khan Sajid Shakeel Kidney Transplant Unit Rehman Medical InstitutePeshawar 25100Khyber PakhtunkhwaPakistan Department of Surgery Princess Noura Binti AbdulRehman UniversityRiyadh 84428Saudi Arabia

BACKGROUND Transplant teams often hesitate to use the right kidney(RK)in living donor(LD)transplants due to the complexities of anastomosing the short,thin-walled right renal veins,which can potentially lead to graft loss or graft ***,circumstances may arise where selecting the RK over the left kidney(LK)is ***,it is crucial to thoroughly examine the implications of such a choice on the overall transplant *** To compare transplant outcomes between recipients of RK and LK while examining the factors that influence these *** We retrospectively analyzed data from adult patients who received LD kidney transplants involving meticulous patient selection and surgical techniques at our center from January 2020 to December *** included all kidney donors who were over 18,fit to donate,and had undergone diethylenetriamine pentaacetic acid split function and/or computed tomography based *** variables examined comprised donor and recipient demographics,and outcome measures included technical graft loss(TGL),delayed or slow graft function(SGF),and post-transplant serum creatinine(SC)*** used a logistic regression model to assess the likelihood of adverse outcomes considering the donor kidney *** Of the 250 transplants performed during the period,56(22%)were *** recipient demographics and transplant factors were comparable for the right and LKs,except that the donor warm and cold ischemia time were shorter for *** and SGF each occurred in 2%(n=1)of RKs and 0.5%(n=1)of LKs,the difference being *** complications,however,were not related to the venous *** RK(2%)developed delayed graft function after 48 hours,which was attributable to postoperative hypoxia rather than the surgical *** post-transplant SC trend and mean SC at the last follow-up were similar across both kidney *** The donor kidney side has little impact on post-transplant

关键词： Living donor Right kidney Right renal vein Venous anastomosis Technical graft loss Early graft function

Dynamic anti-plane analysis for two symmetrically interfacial cracks near circular cavity in piezoelectric bi-materials

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Applied Mathematics and Mechanics(English Edition) 2014年第10期35卷 1261-1270页

作者： A.hassan 宋天舒 Department of Civil Engineering Military Technical College College of Aerospace and Civil Engineering Harbin Engineering University

The present paper is exposed theoretically to the influence on the dynamic stress intensity factor （DSIF） in the piezoelectric bi-materials model with two symmet- rically permeable interracial cracks near the edges of a circular cavity, subjected to the dynamic incident anti-plane shearing wave （SH-wave）. An available theoretical method to dynamic analysis in the related research field is provided. The formulations are based on Green＇s function method. The DSIFs at the inner and outer tips of the left crack are obtained by solving the boundary value problems with the conjunction and crack- simulation technique. The numerical results are obtained by the FORTRAN language program and plotted to show the influence of the variations of the physical parameters, the structural geometry, and the wave frequencies of incident wave on the dimensionless DSIFs. Comparisons with previous work and between the inner and outer tips are con- cluded.

关键词： symmetrically interfacial crack piezoelectric bi-material Green's function,dynamic stress intensity factor (DSIF) dynamic anti-plane shearing wave (SH-wave)

Complement-dependent neuroinflammation in spinal cord injury:from pathology to therapeutic implications

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Neural Regeneration Research 2025年第5期20卷 1324-1335页

作者： hassan Saad Bachar El Baba Ali Tfaily Firas Kobeissy Juanmarco Gutierrez Gonzalez Daniel Refai Gerald R.Rodts Christian Mustroph David Gimbel Jonathan Grossberg Daniel L.Barrow Matthew F.Gary Ali M.Alawieh Department of Neurosurgery Emory University School of MedicineAtlantaGAUSA Department of Neurology Yale UniversityNew HavenCTUSA Center for Neurotrauma Multiomics&Biomarkers(CNMB)Morehouse School of MedicineAtlantaGAUSA

Spinal cord injury remains a major cause of disability in young adults,and beyond acute decompression and rehabilitation,there are no pharmacological treatments to limit the progression of injury and optimize recovery in this *** the thorough investigation of the complement system in triggering and propagating cerebral neuroinflammation,a similar role for complement in spinal neuroinflammation is a focus of ongoing *** this work,we survey the current literature investigating the role of complement in spinal cord injury including the sources of complement proteins,triggers of complement activation,and role of effector functions in the *** study relevant data demonstrating the different triggers of complement activation after spinal cord injury including direct binding to cellular debris,and or activation via antibody binding to damage-associated molecular *** effector functions of complement have been implicated in spinal cord injury,and we critically evaluate recent studies on the dual role of complement anaphylatoxins in spinal cord injury while emphasizing the lack of pathophysiological understanding of the role of opsonins in spinal cord *** this pathophysiological review,we systematically review the different translational approaches used in preclinical models of spinal cord injury and discuss the challenges for future translation into human *** review emphasizes the need for future studies to dissect the roles of different complement pathways in the pathology of spinal cord injury,to evaluate the phases of involvement of opsonins and anaphylatoxins,and to study the role of complement in white matter degeneration and regeneration using translational strategies to supplement genetic models.

关键词： complement neuroinflammation neuroplasticity regeneration spinal cord injury targeted therapy

Liquation cracking in the heat-affected zone of IN939 superalloy tungsten inert gas weldments

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International Journal of Minerals,Metallurgy and Materials 2020年第6期27卷 764-773页

作者： hassan Kazempour-Liasi Mohammad Tajally hassan Abdollah-Pour Faculty of Materials and Metallurgical Engineering Semnan UniversitySemnanIran

The main aim of this study was to investigate liquation cracking in the heat-affected zone(HAZ)of the IN939 superalloy upon tungsten inert gas welding.A solid solution and age-hardenable filler metals were further *** the pre-weld heat-treated samples,upon solving the secondaryγ′particles in the matrix,primaryγ′particles in the base metal grew to"ogdoadically diced cubes"of about 2μm in side *** pre-weld heat treatment reduced the hardness of the base metal to about HV *** studies using optical and fieldemission scanning electron microscopy revealed that the IN939 alloy was susceptible to liquation cracking in the *** constitutional melting of the secondary,eutectic,and Zr-rich phases promoted the liquation cracking in the *** microstructure of the weld fusion zones showed the presence of fine spheroidalγ′particles with sizes of about 0.2μm after the post-weld heat treatment,which increased the hardness of the weld pools to about HV 350 and 380 for the Hastelloy X and IN718 filler metals,*** of a suitable solid solution filler metal could partially reduce the liquation cracking in the HAZ of IN939 alloy.

关键词： superalloy tungsten inert gas weld heat-affected zone liquation cracking

Dry face milling of titanium alloys

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Journal of University of Science and Technology Beijing 2004年第6期11卷 545-548页

作者： Ahmed hassan Manufacturing and Automation Department

In machining titanium alloys, cutting tools generally wear out very rapidlybecause of the high cutting temperature resulted from the low thermal conductivity and density ofthe work material. In order to increase the tool life, it is necessary to suppress the cutting heatas much as possible by applying an abundant amount of coolant, but this will entail serioustechno-environmental and biological problems. To study the performance and avoid these limitations,a PVD-coated insert was used to the dry face mill of (alpha + beta) titanium alloys. As a result itwas found that the inserts exhibit an excellent cutting performance at low cutting speeds and feedrates, and there is no significant difference in the dominant insert failure mode between the wetand dry cutting in discontinuous cutting.

关键词： carbide tool face milling titanium alloy

Parametric study of hexagonal castellated beams in post-tensioned self-centering steel connections

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Frontiers of Structural and Civil Engineering 2019年第5期13卷 1020-1035页

作者： hassan ABEDI SARVESTANI Faculty of Water and Environmental Engineering Shahid Beheshti UniversityTehran 16589-53571Iran

The effects o f important parameters (beam reinforcing plates, initial post-tensioning, and material properties o f steel angles) on the behavior o f hexagonal castellated beams in post-tensioned self-centering (PTSC) connections undergone cyclic loading up to 4% lateral drift have been investigated by finite element (FE) analysis using ABAQUS. The PTSC connection is comprised o f bolted top and bottom angles as energy dissipaters and steel strands to provide self-centering capacity. The FE analysis has also been validated against the experimental test. The new formulations derived from analytical method has been proposed to predict bending moment o f PTSC connections. The web-post buckling in hexagonal castellated beams has been identified as the dominant failure mode when excessive initial post-tensioning force is applied to reach greater bending moment resistance, so it is required to limit the highest initial post-tensioning force to prevent this failure. Furthermore, properties o f steel material has been simulated using bilinear elastoplastic modeling with 1.5% strain-hardening which has perfectly matched with the real material of steel angles. It is recommended to avoid using steel angles with high yielding strength since they lead to the yielding o f bolt shank. The necessity o f reinforcing plates to prevent beam flange from local buckling has been reaffirmed.

关键词： finite element analysis hexagonal castellated beam parametric study post-tensioned self-centering steel connection steel moment-resisting frame

Sound waves in fluidized bed using CFD-DEM simulations

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Particuology 2018年第3期16卷 126-133页

作者： hassan Abbas Khawaja Process and Gas Group Department of Engineering & Safety UiT-The Arctic University of Norway 9037 Langnes Tromso Norway

The speed of sound waves in a fluidized bed is investigated using CFD-DEM numerical simulations, Appro- priate initial and boundary conditions are applied to reproduce bed phenomena. The effect of varying the height of the bed is also studied. The results of the simulations matched those from the literature. The pressure and particle velocity profiles obtained feature oscillatory behavior to which functions （based on a damped standing wave） were fitted, enabling an explicit dependence on time and space variables to be established. These fitted functions were substituted into the linearized governing equations for the two-phase flow. These solutions enabled a new relationship to be derived for the speed of sound and damping in the system. The conclusion drawn is tbat the damping in the system is governed by the effective bulk viscosity of the solid phase, which arises from the particle viscosity.

关键词： Fluidized bed Sound waves Speed of sound Damping time CFD-DEM simulations

Selecting proper sites for underground dam construction using Multi-Attribute Utility Theory in arid and semi-arid regions

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Journal of Mountain Science 2023年第1期20卷 197-208页

作者： Mohammad hassan SADEGHIRAVESH hassan KHOSRAVI Azam ABOLHASANI Department of Environment College of AgricultureTakestan BranchIslamic Azad UniversityTakestanIran Department of Reclamation of Arid and Mountainous Regions Faculty of Natural ResourcesUniversity of TehranTehranIran

Although the construction of underground dams is one of the best methods to conserve water resources in arid and semi-arid regions,applying efficient methods for the selection of suitable sites for subsurface dam construction remains a *** to the costly and time-consuming methods of site selection for underground dam construction,this study aimed to present a new method using geographic information systems techniques and decision-making *** exclusionary criteria including fault,slope,hypsometry,land use,soil,stream,geology,and chemical properties of groundwater were selected for site selection of dam construction and inappropriate regions were omitted by integration and scoring layers in ArcGIS based on the Boolean ***,appropriate sites were prioritized using the Multi-Attribute Utility *** to the results of the utility coefficient,seven sites were selected as the region for underground dam construction based on all criteria and experts’*** site of Nazarabad dam was the best location for underground dam construction with a utility coefficient of 0.7137 followed by sites of Akhavan with a utility coefficient of 0.4633 and Mirshamsi with a utility coefficient of *** study proposed a new approach for the construction of the subsurface dam at the proper site and help managers and decision-makers achieve sustainable water resources with limited facilities and capital and avoid wasting national capital.

关键词： Prioritization Geographic information system Multi-Attribute decision making Arid region