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Static dissolution-induced 3D pore network modification and its impact on critical pore attributes of carbonate rocks

Advances in Infectious Diseases（传染病进展） 2024年第1期 162页

作者： Prosper Iheanacho Okonkwo Kingsley Chinedu Okafor Bitrus Salome Kwaghal Bolarinwa Boluwatito joel Haruna Garba

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Petroleum Exploration and Development 2019年第2期46卷 374-383页

作者： ANDRIAMIHAJA Spariharijaona PADMANABHAN Eswaran BEN-AWUAH joel SOKKALINGAM Rajalingam Hydrocarbon Recovery and Technology Group Research and Technology PETRONAS Research Sdn.Bhd. Jalan Ayer Itam Kawasan Institusi Bangi Department of Geosciences Faculty of Petroleum Engineering and Geosciences Universiti Teknologi PETRONAS Department of Applied Geology Faculty of Engineering and Science Curtin University Department of Fundamental and Applied Sciences Universiti Teknologi PETRONAS

To determine the effect of dissolution on pore network development in carbonate rocks, dissolution experiments, X-Ray microtomography, and thin section analysis were conducted on argillaceous limestone and grain limestone samples at different temperatures and constant pH, HCl concentration. The relationship between Ca^(2+) concentration and time was revealed through the experiments; pore size distribution before and after dissolution indicate that there is no correlation between the temperature and pore size variation, but pore size variation in grain limestone is more significant, indicating that the variation is mainly controlled by the heterogeneity of the rock itself(initial porosity and permeability) and the abundance of unstable minerals(related to crystal shape, size and mineral type). At different temperatures, the two kinds of carbonate rocks had very small variation in pore throat radius from 0.003 mm to 0.040 mm, which is 1.3 to 3.5 times more, 1.7 on average of the original pore throat radius. Their pore throat length varied from 0.05 mm to 0.35 mm. The minor changes in the pore throat radius, length and connectivity brought big changes to permeability of up to 1 000×10^(-3) μm^2.

关键词： 3D pore networks carbonate rocks pore structure mudstone grainstone acidizing dissolution, X-Ray micro tomography

Peripancreatic collections in acute pancreatitis: Correlation between computerized tomography and operative fi ndings

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World Journal of Gastroenterology 2010年第34期16卷 4291-4296页

作者： Santhi Swaroop Vege joel G Fletcher Rupjyoti Talukdar Michael G Sarr Miles and Shirley Fiterman Center for Digestive Diseases Rochester MN 55905 United States Department of Radiology Mayo Clinic Rochester MN 55905 United States Department of Surgery Mayo Clinic Rochester MN 55905 United States

AIM: To evaluate the ability of contrast-enhanced computerized tomography (CECT) to characterize the nature of peripancreatic ***: Twenty five patients with peripancreatic collections on CECT and who underwent operative intervention for severe acute pancreatitis were retrospectively studied. The collections were classified into (1) necrosis without frank pus; (2) necrosis with pus; and (3) fluid without necrosis. A blinded radiologist assessed the preoperative CTs of each patient for necrosis and peripancreatic fluid collections. Peripancreatic collections were described in terms of volume, location, number, heterogeneity, fluid attenuation, wall perceptibility, wall enhancement, presence of extraluminal gas, and vascular ***: Fifty-four collections were identif ied at operation, of which 45 (83%) were identif ied on CECT. Of these, 25/26 (96%) had necrosis without pus, 16/19 (84%) had necrosis with pus, and 4/9 (44%) had fluid without necrosis. Among the study characteristics, fluid heterogeneity was seen in a greater proportion of collections in the group with necrosis and pus, compared to the other two groups (94% vs 48% and 25%, P = 0.002 and 0.003, respectively). Among the wall characteristics, irregularity was seen in a greater proportion of collections in the groups with necrosis with and without pus, when compared to the group with fluid without necrosis (88% and 71% vs 25%, P = 0.06 and P < 0.01, respectively). The combination of heterogeneity and presence of extraluminal gas had a specif icity and positive likelihood ratio of 92% and 5.9, respectively, in detecting pus. CONCLUSION: Most of the peripancreatic collections seen on CECT in patients with severe acute pancreatitis who require operative intervention contain necrotic tissue. CECT has a somewhat limited role in differentiating the different types of collections.

关键词： Contrastenhanced computerized tomogra-phy Correlation Pancreatic necrosis Pancreatitis Peripancreatic fluid collection Surgery

Solar-powered chemistry: Engineering low-dimensional carbon nitride-based nanostructures for selective CO_(2) conversion to C_(1)- C_(2) products

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InfoMat 2022年第1期4卷 40-104页

作者： Sue-Faye Ng joel Jie Foo Wee-Jun Ong School of Energy and Chemical Engineering Xiamen University MalaysiaSepangSelangorMalaysia Center of Excellence for NaNo Energy&Catalysis Technology(CONNECT) Xiamen University MalaysiaSepangSelangorMalaysia College of Chemistry and Chemical Engineering Xiamen UniversityXiamenChina

CO_(2)capture and conversion has been prospected as an auspicious technology to simultaneously tackle the rise in global CO_(2)emission and produce valueadded fuels with the goal of accomplishing carbon neutrality.A sustainable route to achieve this is via the utilization of solar energy,thereby harnessing the abundant and nonexhaustive resource to shift our reliance away from rapidly depleting fossil *** carbon nitride(g-C_(3)N_(4))and its allotrope have earned its rank as a fascinating metal-free photocatalyst due to its superior stability,high surface-area-to-volume ratio,and tunable surface *** leveraging these properties,robust carbon nitride-based nanostructures are engineered for photocatalytic CO_(2)conversion to energy-rich C_(1)-C_(2) product,which is indispensable in the chemical ***,this review presents the latest panorama of experimental and computational research on tuning the local electronic,surface chemical coordination environment,charge dynamics and optical properties of low-dimensional carbon nitride and its allotropes toward highly selective and efficient CO_(2)*** name a few,structural engineering,point-defect engineering,heterojunction construction,and cocatalyst *** advance this frontier,critical insights are elucidated to establish the structure-performance relationship and unravel primary factors dictating the selectivity of C_(1)-C_(2) molecules from CO_(2)***-field assisted photocatalysis such as with electric(photoelectro-)and heat(photothermal)is discussed to uncover the synergistic contributions that drive the development in ***,future challenges and prospects are outlined for the potential application of solar-driven CO_(2)conversion,along with the scale-up strategy from the economic viewpoint toward the rational development of high-efficiency carbon nitride catalysts.

关键词： carbon nitride CO_(2)reduction external fields interfacial design nanostructure photocatalysis

Guest editorial: Network architectures and communication protocols for smart industrial IoT applications

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Digital Communications and Networks 2023年第2期9卷 293-295页

作者： Fazlullah Khan joel J.P.C.Rodrigues Mian Ahmad Jan Department of Computer Science Abdul Wali Khan University Mardan23200Khyber PakhtunkhwaPakistan Federal University of Piauí(UFPI) Brazil Instituto de TelecomunicaçoesPortugal

The rapid growth in hardware technologies and the fourth industrial revolution-Industry 4.0 have enabled the Internet of Things(IoT)to be *** of the main drivers in Industry 4.0 is smart and secured Industrial IoT(IIoT)[1].The IIoT results from the widespread use of computers and the interconnectedness of *** has made software a crucial tool for almost every industry,from bakeries and arts to manufacturing facilities and healthcare systems[2].The IIoT devices can be mobile and geographically distributed over a long distance,which exposes them to network disturbances,Quality of Service(QoS)degradation,and security *** addition,the IIoT is a complex network at a large scale,and there is a dire need for network architecture and protocol design to accommodate these diverse domains and competencies and handle the increasing levels of ***,in this special issue,we aim to focus on the challenges of network architectures and communication protocol design in the context of the smart *** special issue has attracted numerous high-quality research articles and has accepted fourteen research papers[3–16].

关键词： IoT network communication

Clinical Study of 8 Needles Method Acupuncture Treatment for LDH

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Clinical Study of 8 Needles Method Acupuncture Treatment for...

作者： Xavier joel Salvador 南京中医药大学

学位级别：硕士

目的临床数据分析旨在比较“8针法”针灸治疗与经典的中医针灸治疗LDH,得出的治疗方法有更高的症状改善腰椎间盘突出症的治疗以及试图找到一个更有效的LDH的针灸技术。方法收集2020年4月至2020年11月被确诊为腰椎间盘突出症(LDH)的患者... 详细信息

目的临床数据分析旨在比较“8针法”针灸治疗与经典的中医针灸治疗LDH,得出的治疗方法有更高的症状改善腰椎间盘突出症的治疗以及试图找到一个更有效的LDH的针灸技术。方法收集2020年4月至2020年11月被确诊为腰椎间盘突出症(LDH)的患者,60例。随机分为组1(n=30)和组2(n=30)。组1采用“8针法”针灸治疗。组2采用传统针刺疗法治疗。两组治疗频率均为每周2次,间隔3～4天,共6周。12个疗程为一个疗程。每次治疗持续时间为30分钟。采用视觉模拟评分(Visual Analogue Scale,VAS)、日本骨科协会评分(Japan Orthopedic Association Score,JOA)、Roland-Morris 残障问卷工作天数(Roland-Morris Disability Questionnaire Work days,RMDQ)、Oswestry 残障指数问卷(Oswestry Disability Index,ODIQ)和MRI对两组的结果进行评估。数据分析在患者完成一个疗程后进行。结果本研究显示,经过一个疗程后,两组患者疼痛、功能和生活质量水平(VAS、JOA、RMDQ、ODIQ)均有统计学意义的改善(p<.001)。然而,发现接受8针治疗方法的患者,疼痛显著降低(M=.20,SE=.20)(p=.008),功能水平、完成生理和社会活动(ODIQ)(M=.07,SE=.01)(p=.001)较接受传统治疗的高(M=1.03,SE=.23)(p=.008),ODIQ(M=.10,SE=0.2)(p=.001)。试验还显示,在VAS中,8针法治疗在6次治疗后达到最佳结果VAS(M=.20,SE=.20)(p<.001),而传统治疗仅在12次治疗后达到最佳结果VAS(M=1.03,SE=.23)(p<.001)。8针法疗法各指标均有较高的得分:VAS(M=.20,SE=.20)(p<.001);JOA(M=28.60,SE=.40);RMDQ(M=.27,SE=.27):ODIQ(M=.07,SE=.01)(p<.001),优于传统治疗(M=1.03,SE=.23)(p<.001);JOA(M=27.57,SE=.52);RMDQ(M=.53,SE=.53);ODIQ(M=.10,SE=.02)(p<.001)。两组间JOA和RMDQ差异无统计学意义结论对于腰椎间盘突出症(LDH)轻中度患者,“八针法”是更有效的非手术方法。

关键词：针灸腰椎间盘突出症(LDH) 8针法

Modified activated carbon with interconnected fibrils of iron-oxyhydroxides using Mn^(2+) as morphology regulator, for a superior arsenic removal from water

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Journal of Environmental Sciences 2019年第2期31卷 403-414页

作者： Cesar Nieto-Delgado joel Gutiérrez-Martínez J.Rene Rangel-Méndez Environmental Sciences Division Potosino Institute of Scientific and Technological ResearchIPICyT

The arsenic removal efficiency of iron-modified activated carbons depends greatly on the number of available iron oxide surface sites, which are given by the surface area of the anchored particles. In this sense, aiming the generation of an adsorbent with superior arsenic adsorption capacity, we developed a protocol to anchor interconnected fibrils of iron oxyhydroxides, using Mn^(2+) as a morphology regulator. The protocol was based on a microwave-assisted hydrothermal method, using bituminous based activated carbon and both Fe^(2+) and Mn^(2+) ions in the hydrolysis solution. The elemental analysis of modified carbons revealed that Mn does not anchor to the carbon. However, when Mn is included in the hydrolysis solution, the iron content in the activated carbon increased up to 3.5 wt%,without considerable decreasing the adsorbent surface area. Under specific hydrothermal conditions, the Mn^(2+) promoted the formation of iron oxide nanoparticles shaped as interconnected fibrils. This material showed a superior arsenic adsorption capacity in comparison to similar iron modified activated carbons(5 mg As/g carbon, at 2 mg As/L),attributed to the increase in quantity and availability of active sites located on the novel interconnected fibrils of iron oxyhydroxides nanostructures.

关键词： Iron oxide nanostructures Hydrothermal synthesis Microwave Adsorption capacity Kinetics

Disbond detection with piezoelectric wafer active sensors in RC structures strengthened with FRP composite overlays

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Earthquake Engineering and Engineering Vibration 2003年第2期2卷 213-223页

作者： Victor Giurgiutiu Kent Harries Michael Petrou joel Bost Josh B.Quattlebaum Department of Mechanical Engineering University of South CarolinaUSA Associate Professor Department of Civil and Environmental Engineering University of South CarolinaUSA Assistant Professor Department of Civil and Environmental Engineering University of South CarolinaUSA Associate Professor Department of Mechanical Engineering University of South CarolinaUSA Undergraduate Research Assistant Department of Civil and Environmental Engineering University of South CarolinaUSA Graduate Research Assistant

The capability of embedded piezoelectric wafer active sensors(PWAS)to perform in-situ nondestructive evaluation(NDE)for structural health monitoring(SHM)of reinforced concrete(RC)structures strengthened with fiber reinforced polymer(FRP)composite overlays is ***,the disbond detection method were developed on coupon specimens consisting of concrete blocks covered with an FRP composite *** was found that the presence of a disbond crack drastically changes the electromecfianical(E/M)impedance spectrum lneasurcd at the PWAS *** spectral changes depend on the distance between the PWAS and the crack ***,large scale experiments were conducted on a RC beam strengthened with carbon fiber reinforced polymer(CFRP)composite *** beam was subject to an accelerated fatigue load regime in a three-point bending configuration up to a total of 807,415 *** these fatigue tests,the CFRP overlay experienced disbonding beginning at about 500,000 *** PWAS were able to detect the disbonding before it could be reliably seen by visual *** correlation between the PWAS readings and the position and extent of disbond damage was *** preliminary results demonstrate the potential of PWAS technology for SHM of RC structures strengthened with FRP composite overlays.

关键词： FRP composite overlays composite strengthening and rehabilitation structural health monitoring piezoelectric wafer active sensors E/M impedance aging infrastructure disbond damage PWAS

Adult celiac disease with acetylcholine receptor antibody positive myasthenia gravis

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World Journal of Gastroenterology 2009年第38期15卷 4741-4744页

作者： Hugh J Freeman Helen R Gillett Peter M Gillett joel Oger Department of Medicine (Gastroenterology and Neurology) University of British Columbia

Celiac disease has been associated with some autoimmune disorders. A 40-year-old competitive strongman with celiac disease responded to a gluten-free diet, but developed profound and generalized motor weakness with acetylcholine receptor antibody positive myasthenia gravis, a disorder reported to occur in about 1 in 5000. This possible relationship between myasthenia gravis and celiac disease was further explored in serological studies. Frozen stored serum samples from 23 acetylcholine receptor antibody positive myasthenia gravis patients with no intestinal symptoms were used to screen for celiac disease. Both endomysial and tissue transglutaminase antibodies were examined. One of 23 (or, about 4.3%) was positive for both IgA-endomysial and IgA tissue transglutaminase antibodies. Endoscopic studies subsequently showed duodenal mucosal scalloping and biopsies confirmed the histopathological changes of celiac disease. Celiac disease and myasthenia gravis may occur together more often than is currently appreciated. The presence of motor weakness in celiac disease may be a clue to occult myasthenia gravis, even in the absence of intestinal symptoms.

关键词： Acetylcholine receptor antibodies Celiacdisease Myasthenia gravis Transglutaminase antibodies

Artificial intelligence in colonoscopy

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World Journal of Gastroenterology 2021年第29期27卷 4802-4817页

作者： joel Joseph Ella Marie LePage Catherine Phillips Cheney Rishi Pawa Department of Internal Medicine Wake Forest Baptist Medical CenterWinston SalemNC 27157United States Department of Internal Medicine Wake Forest School of MedicineWinston SalemNC 27157United States Department of Internal Medicine Section of Gastroenterology and HepatologyWake Forest Baptist Medical CenterWinston-SalemNC 27157United States

Colorectal cancer remains a leading cause of morbidity and mortality in the United *** in artificial intelligence(AI),specifically computer aided detection and computer-aided diagnosis offer promising methods of increasing adenoma detection rates with the goal of removing more pre-cancerous ***,these methods also may allow for smaller non-cancerous lesions to be diagnosed in vivo and left in place,decreasing the risks that come with unnecessary *** review will provide an overview of current advances in the use of AI in colonoscopy to aid in polyp detection and characterization as well as areas of developing research.

关键词： Colonoscopy Artificial intelligence Computer-aided detection Detection Characterization Computer-aided diagnosis