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Effect of endogenous hypergastrinemia on gallbladder volume and ejection fraction in patients with autoimmune gastritis

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Hepatobiliary & Pancreatic Diseases International 2012年第5期11卷 527-531页

作者： Mustafa yakut Onur Keskin irfan Soykan Division of Gastroenterology Ibni Sina HospitalAnkara University Faculty of Medicine

BACKGROUND: Gastrin has a cholecystokinetic action on gallbladder motility, and cholecystokinin and gastrin act directly on the smooth muscle of the gallbladder. The aim of this study was to investigate the effect of endogenous hypergastrinemia on gallbladder motility in patients with autoimmune gastritis. METHODS: Forty-one patients (29 females, 12 males; mean age, 46 years) with autoimmune gastritis and 29 healthy subjects (17 females, 12 males; mean age, 44.8 years) were enrolled in the study. Fasting and postprandial gallbladder volumes were measured ultrasonographically with the ellipsoid technique and the ejection fraction of the gallbladder was calculated from fasting and postprandial volumes. All subjects were investigated after 12 hours of fasting and 30 minutes after a standard test meal. RESULTS: The gallbladder ejection fraction (%) of the patients with autoimmune gastritis was lower than that of the control group (46.06±18.28% vs 55.03±14.67%, P=0.032). There was no difference between patients with autoimmune gastritis and the control group in terms of the mean fasting gallbladder volume (30.38±12.85 vs 29.27±9.91 cm 3 , P=0.189) and the mean postprandial gallbladder volume (15.67±8.32 vs 13.44±7.69 cm 3 , P=0.258). Logistic regression analysis of baseline parameters revealed that 'abdominal bloating' was a risk factor for the low gallbladder ejection fraction in autoimmune gastritis patients (P=0.045, F=4.40). In addition, logistic regression analysis of baseline parameters revealed that smoking (n=5, P=0.025, F=5.44) is a predictor of low gallbladder ejection fraction in patients with autoimmune ***: Patients with endogenous hypergastrinemia have a low gallbladder ejection fraction compared with healthy controls. This study shows that at least part of upper gastrointestinal symptoms observed in this patient population may be due to altered gallbladder motility.

关键词： gallbladder motility autoimmune gastritis hypergastrinemia

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Evaporative/radiative electrospun membrane for personal cooling

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Nano Research 2023年第2期16卷 2563-2571页

作者： Mohammad irfan Iqbal Shuo Shi Gokula Manikandan Senthil Kumar Jinlian Hu Institute of Textiles and Clothing The Hong Kong Polytechnic UniversityHong Kong 999077China Department of Biomedical Engineering City University of Hong KongHong Kong 999077China Department of Building Environment and Energy Engineering The Hong Kong Polytechnic UniversityHong Kong 999077China

Functional textiles that promote daily comfort and productivity must efficiently release body sweats and transmit radiative heat through sweat evaporation and mid-infrared radiation(MIR)(8–13μm).However,most of the traditional clothing cannot provide simultaneous sweat evaporation and mid-infrared radiation transmission efficiently,leading to a poor design of personal cooling ***,an evaporative/radiative integrated functional fibrous electrospun membrane is meticulously designed and controllably fabricated via facile electrospinning technology for personal cooling *** developed membrane can be applied as a smart wearable with distinct personal thermal management *** promising temperature and humidity responsive vapor transmission of the membrane grants 1.2 times of evaporative cooling than that of traditional ***,based on its high mid-infrared radiation transmission(53%)property in the range of 8–13μm,the as-spun membrane provides extra cooling of 1.5°C than that of ***,the building energy saving performances demonstrated that 47.1%annual building cooling can be achieved using the developed electrospun *** general,the evaporative/radiative electrospun membrane creates a passive cooling microclimate for the human body,meeting the growing demand of wearable for personal cooling.

关键词： building energy cooling management electrospinning evaporative cooling radiative cooling

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An Optimal DPM Based Energy-Aware Task Scheduling for Performance Enhancement in Embedded MPSoC

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Computers, Materials & Continua 2023年第1期74卷 2097-2113页

作者： Hamayun Khan irfan Ud Din Arshad Ali Mohammad Husain Department of Electrical Engineering Faculty of Engineering&Technology Superior University Lahore54000Pakistan Department of Computer Science Faculty of Computer Science&IT Superior University Lahore54000Pakistan Faculty of Computer and Information Systems Islamic University of MadinahAl Madinah Al Munawarah42351Saudi Arabia

Minimizing the energy consumption to increase the life span and performance of multiprocessor system on chip(MPSoC)has become an integral chip design issue for multiprocessor *** performance measurement of computational systems is changing with the advancement in *** to shrinking and smaller chip size power densities onchip are increasing rapidly that increasing chip temperature in multi-core embedded *** operating speed of the device decreases when power consumption reaches a threshold that causes a delay in complementary metal oxide semiconductor(CMOS)circuits because high on-chip temperature adversely affects the life span of the *** this paper an energy-aware dynamic power management technique based on energy aware earliest deadline first(EA-EDF)scheduling is proposed for improving the performance and reliability by reducing energy and power consumption in the system on chip(SOC).Dynamic power management(DPM)enables MPSOC to reduce power and energy consumption by adopting a suitable core configuration for task *** migration avoids peak temperature values in the multicore *** utilization factor(ui)on central processing unit(CPU)core consumes more energy and increases the temperature *** technique switches the core bymigrating such task to a core that has less temperature and is in a low power *** proposed EA-EDF scheduling technique migrates load on different cores to attain stability in temperature among multiple cores of the CPU and optimized the duration of the idle and sleep periods to enable the low-temperature *** effectiveness of the EA-EDF approach reduces the utilization and energy consumption compared to other existing methods and *** simulation results show the improvement in performance by optimizing 4.8%on u_(i) 9%,16%,23%and 25%at 520 MHz operating frequency as compared to other energy-aware techniques for MPSoCs when the least number of tasks is in running state and can

关键词： Dynamic power management dynamic voltage&frequency scaling dynamic thermal management multiprocessor system on chip complementary metal oxide semiconductor reliability

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Study on the geochemical correlation of crude oils of Palaeocene and Jurassic ages from the Potowar Indus Basin in northern Pakistan

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Chinese Journal Of Geochemistry 2010年第1期29卷 82-93页

作者： Muhammad irfan Jalees Fazeelat Tahira Hina Saleem Chemistry Department University of Engineering and TechnologyLahore Institute of Environmental Engineering and Research University of Engineering and Technology

This study deals with a detailed geochemical characterization of three crude oils from the Upper Indus Basin,Punjab,*** samples were obtained from three productive oil fields of the Datta Formation(Jurassic),Lochhart(Palaeocene) and the Dhak Pass zone(Palaeocene).The GC parameters for and the bulk properties of Datta Formation oils are essentially coincident with those of the oils from the Dhak Pass Formation in the Upper Indus Basin,Pakistan and the oils likely originate from a marine source *** contrast,the Lockhart Formation oils show different behaviors and seem to be originated from dirty carbonate rocks although all three crude oils are mature,being of non-biodegraded and somewhat mixed organic matter *** Pr/Ph values and high C35 homohopane index for the Lockhart Formation oils suggest a source of anoxic environment with low Eh while oils from the Datta Formation and Dhak Pass Formation showed different trends,i.e.,lower values of C35 homohopane index indicating different depositional environment than oil from the Lockhart *** three crude oils from the Upper Indus Basin are mature for the hopane ratios,i.e.,Ts/Ts+Tm,C3222S/(S+R) and C30 αβ/(αβ+βα) and sterane ratios,i.e.,C2922S/(S+R) and C29ββ/(ββ+αα) but oils from the Lockhart Formation seem to be less mature than those from the Palaeocene and Datta Formation according to plots like API° *** Index,Pr/Ph *** relative composition of 5α(H),14β(H),17β(H)-24-ethylecholestanes and the C2920S/20S+20R index,indicate that all three crude oils are equally mature,which makes it unlikely with respect to the above said *** difference is may be due to the migratory chromatography which alters the concentrations of sterane and hoapnes and hence gives different *** oils do not exhibit UCM and have complete n-alkane profiles indicating non-biodegradation.

关键词：原油地球化学特征印度河流域巴基斯坦古新世侏罗纪非生物降解上游流域剖面显示

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Methodologies and applications in Digital China

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Chinese Science Bulletin 2012年第28期57卷 3761-3768页

作者： WENG JingNong RAFIQUE irfan ABBASI Maissom Qanber School of Computer Science and Engineering Beihang UniversityBeijing 100191China

This article portrays a concise review on an extensive range of state-of-art advancement in methodologies and applications for Digital China,which includes models,algorithms,theory framework,engineering technology,sci... 详细信息

关键词：数字中国应用数字方法工程技术

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Synthesis of pyrazine-2,3-dicarbonitrile and 1,2,4-triazine-5(4H)-one derivatives from furan-2,3-diones

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Chinese Chemical Letters 2013年第12期24卷 1130-1133页

作者： Sevket Hakan ngren Emine Dilekoglu irfan Koca Department of Chemistry Faculty of Arts and SciencesBozok University

The reaction of furan-2,3-diones with S-methylisothiosemicarbazide hydroiodide yielded novel 1,2,4- triazine-5（4H）-ones, and reaction of furan-2,3-diones with diaminomaleonitrile led to the formation of pyrazine-2,3-dicarbonitrile derivatives, and the hydrolysis of these products led to the formation of more new pyrazine-2,3-dicarbonitrile derivatives. These compounds are potential herbicides and pesticides.

关键词： Pyrazine-2 3-dicarbonitrile 1 2 4-Triazine-5(4H)-ones Furan-2 3-diones S-Methyl isothiosemicarbazide Diaminomaleonitrile

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Numerical Analysis & Optimization of Leaf Spring

Numerical Analysis & Optimization of Leaf Spring

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作者： irfan Ullah 西安科技大学

学位级别：硕士

Composite materials are gaining enormous interests in applications,due to its low weight,high strength and ease in adapting almost any *** is becoming more popular in transportation ***,marine and automotive *** current studies,an alternative design for leaf spring of Suzuki Mehran is investigated,to be replaced with composite *** conventional leaf spring of Mehran is a 3 leafs metal model made of 50 Cr *** scope of this work is to analyze the conventional model for static and dynamic loading *** was done through FEM in Ansys *** the static analysis,a case was considered,when the vehicle is cursing at a speed of 50 m/s,and turning in circular plane road of radius 10 *** developed in the spring under these conditions are included in this *** dynamic loading condition,stress analysis was conducted for the case when the vehicle is moving over a road *** a damping analysis was also carried out to fine the influence of friction coefficient on the damping characteristic,influence of frequency on the damping characteristic and finally the influence of amplitude on the damping *** second part of the study is to develop optimization framework,to reduce the weight of the spring by employing a carbon fiber based composite *** part of the study was done using Ansys model composite modelling called Ansys *** Parameters were created for the “number of composite layups”,and respective fiber *** objective was to find an optimum combination of these design variables with objective function to reduce the overall weight of the spring constrained with the stiffness and failure of the fiber.10 candidate's points were identified and recorded here for reference.

关键词： composite model dynamic loading FEM static analysis optimization Damping

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Shape Memory Behavior of [111]-Oriented NiTi Single Crystals After Stress-Assisted Aging

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Acta Metallurgica Sinica(English Letters) 2016年第3期29卷 282-286页

作者： irfan Kaya Hirobumi Tobe Haluk Ersin Karaca Emre Acar yuriy Chumlyakov Department of Mechanical Engineering Faculty of Engineering Anadolu University 26555 Eskisehir Turkey Department of Mechanical Engineering University of Kentucky Lexington KY 40506 USA Department of Aircraft Engineering Erciyes University38039 Kayseri Turkey Siberian Physical-Technical Institute at Tomsk State University Tomsk 634050 Russia

The shape memory behavior of [111]-oriented Ni_（51）Ti_（49）（at.%） single crystals was investigated after stressassisted aging at 500 °C for 1.5 h under a compressive stress of-150 *** was found that a single family of Ni_4Ti_3 precipitates with two crystallographically equivalent variants was formed after aging under compressive *** aging resulted in tensile two-way shape memory effect strain of 1.56% under-5 *** cycling under-600 MPa resulted in a transformation strain of-2.15%,while the subsequent thermal cycling under-5 MPa resulted in a tensile two-way shape memory effect strain of 2.2%.

关键词： Shape memory alloy(SMA) Two-way shape memory effect Aging treatment Precipitation Phase transformations

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Response of basement wall in tall buildings foundation under lateral loading

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Frontiers of Structural and Civil Engineering 2022年第11期16卷 1415-1423页

作者： irfan JAMIL Irshad AHMAD Aqeel Ur REHMAN Aqib AHMED Ameer HAMZA Wali ULLAH Department of Civil Engineering University of Engineering and TechnologyPeshawar 25000Pakistan

With increasing population and limitation of availability of land,tall buildings supported on piled raft foundations are increasingly used in the modern *** increase the ratio of floor area to height,and to fulfill storage and parking facilities requirements,these tall buildings usually have more than one basement ***,during the foundation design,engineers have not considered the basement wall contribution to resisting lateral load induced by earthquake or wind and this can result in an uneconomical construction of *** this research work,an experimental study was performed on small-scale models,in order to study basement wall contribution,and the raft contribution including for piled raft foundations,to resisting lateral *** configurations of piles in 2×2,2×3,and 3×3 patterns were tested as a pile group,piled raft and piled raft with a basement *** show that when a basement wall is present,the lateral displacement decreases and the demand on each pile *** piled raft design can become more economical for tall buildings if the basement’s walls are taken into account.

关键词： basement wall lateral load displacement piled raft

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Regulating the fate of stem cells for regenerating the intervertebral disc degeneration

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World Journal of Stem Cells 2021年第12期13卷 1881-1904页

作者： Sobia Ekram Shumaila Khalid Asmat Salim irfan Khan Dr.Panjwani Center for Molecular Medicine and Drug Research International Center for Chemical and Biological SciencesUniversity of KarachiKarachi 75270SindhPakistan

Lower back pain is a leading cause of disability and is one of the reasons for the substantial socioeconomic *** etiology of intervertebral disc(IVD)degeneration is complicated,and its mechanism is still not completely *** such as aging,systemic inflammation,biochemical mediators,toxic environmental factors,physical injuries,and genetic factors are involved in the progression of its ***,no therapy for restoring degenerated IVD is available except pain management,reduced physical activities,and surgical ***,it is imperative to establish regenerative medicine-based approaches to heal and repair the injured disc,repopulate the cell types to retain water content,synthesize extracellular matrix,and strengthen the disc to restore normal spine *** therapy has gained attention for IVD management as an alternative therapeutic *** this review,we present an overview of the anatomical and molecular structure and the surrounding pathophysiology of the *** therapeutic approaches,including proteins and growth factors,cellular and gene therapy,and cell fate regulators are ***,small molecules that modulate the fate of stem cells for their differentiation into chondrocytes and notochordal cell types are highlighted.

关键词： Stem cell Intervertebral disc Degeneration Inflammation Cell therapy Gene modification

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