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Stroke & Vascular Neurology 2019年第1期4卷 43-47页

作者： Jessica K Campos Li-Mei Lin Narlin B Beaty Matthew T Bender Bowen Jiang david a zarrin Alexander L Coon Department of Neurosurgery Johns Hopkins University School of MedicineBaltimoreMarylandUSA Department of Neurosurgery University of CaliforniaIrvineOrangeCaliforniaUSA

Background An estimated 2%-3%of the population harbour an intracranial *** atherosclerotic cervical carotid disease is not *** management of these two entities remains a challenge within the *** presentation We report a single case of concomitant carotid stenosis and two ipsilateral unruptured intracranial aneurysms treated with a single-staged cervical carotid stenting and cerebral aneurysm embolisation with the Pipeline embolisation *** No consensus currently exists to guide endovascular treatment of intracranial aneurysms associated with asymptomatic ipsilateral ***,we present a case of asymptomatic moderate carotid stenosis with two ipsilateral intracranial aneurysms and suggest carotid artery stenting takes procedural priority over aneurysm embolisation in single-stage *** rationale for the sequence of neurointerventions is based on the tracking a robust distal access system beyond a stenotic proximal carotid lesion and stabilisation of the ulcerated plaque to avoid thromboembolic complications associated with plaque irritation during aneurysm *** cases and longer follow-up will be needed to further assess the efficacy of this technique.

关键词： aneurysm carotid stenosis

Advances in endovascular aneurysm management: flow modulation techniques with braided mesh devices

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Stroke & Vascular Neurology 2020年第1期5卷 1-13页

作者： Jessica K Campos Barry Cheaney II Brian V Lien david a zarrin Chau D Vo Geoffrey P Colby Li-Mei Lin Alexander L Coon Department of Neurosurgery University of California Irvine School of MedicineOrangeCaliforniaUSA Oregon Health and Science University School of Medicine PortlandOregonUSA Neurosurgery Johns Hopkins UniversityBaltimoreMarylandUSA Johns Hopkins University School of Medicine BaltimoreMarylandUSA UCLA Neurosurgery Ronald Reagan UCLA Medical CenterLos AngelesCaliforniaUSA Carondelet Neurological Institute St.Joseph's HospitalCarondelet Health NetworkTucsonArizonaUnited States

Flow diverters and flow disruption technology,alongside nuanced endovascular techniques,have ushered in a new era of treating cerebral ***,we provide an overview of the latest flow modulation devices and highlight the... 详细信息

关键词： flow braided hered

T1 colorectal cancer management in the era of minimally invasive endoscopic resection

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World Journal of Gastrointestinal Oncology 2024年第6期16卷 2284-2294页

作者： Shirley Xue Jiang Aein zarrin Neal Shahidi Department of Medicine University of British ColumbiaVancouver V6Z2K5British ColumbiaCanada Division of Gastroenterology St.Paul’s HospitalVancouver V6Z2K5British ColumbiaCanada

T1 colorectal cancer(CRC),defined by tumor invasion confined to the submucosa,has historically been managed by *** understanding of recurrence and lymph node metastases risk,coupled with advances in endoscopic resection techniques,have led to an increasing capacity for organ-sparing local *** invasive management of T1 CRC begins with optical evaluation of the lesion to diagnose invasive disease and quantify depth of invasion,which informs therapeutic decision *** selection between various available endoscopic resection techniques depends upon lesion characteristics,technique risk-benefit profiles,and location-specific *** endoscopic resection,established histopathology features determine the risk of recurrence and subsequent management including surveillance or adjuvant surgical *** management of non-operative candidates deviates from conventional recommendations with emerging treatment strategies in select populations.

关键词： Cancer Colonoscopy Endoscopy Polyp Surgery

Flow diversion covering the M1 origin as a last resort

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Stroke & Vascular Neurology 2019年第3期4卷 141-147页

作者： Li-Mei Lin Matthew T Bender Geoffrey P Colby Bowen Jiang Jessica K Campos david a zarrin Robert W C Young Risheng Xu Justin M Caplan Judy Huang Rafael J Tamargo Alexander L Coon Department of Neurosurgery University of California IrvineOrangeCaliforniaUSA Department of Neurosurgery Johns Hopkins University School of MedicineBaltimoreMarylandUSA Department of Neurosurgery University of California Los AngelesLos AngelesCaliforniaUSA

Introduction Internal carotid artery termination(ICAT)and proximal A1 aneurysms can be challenging for open surgical clipping or endovascular *** with flow diversion covering the middle cerebral artery(MCA),an end vessel supplying a terminal circulation,has not been *** A prospective,Institutional Review Board-approved database was analysed for patients with pipeline embolisation device(PED)placement from the anterior cerebral artery(ACA)to the ICA during cerebral aneurysm *** Nine cases were identified,including five proximal A1,three posterior communicating artery and one ICAT aneurysm *** aneurysm size was 8.3 mm(range 3-17),with 67%saccular and 78%*** indication for treatment was significant dome irregularity(44%),recurrence or enlargement(33%),underlying collagen vascular disorder(11%)and traumatic pseudoaneurysm(11%).Preservation of the ipsilateral ACA(with PED placed in A1)was performed when the anterior communicating artery(67%)or contralateral A1(33%)were absent on *** coiling was done in four cases(44%).There was one major stroke leading to mortality(11%)and one minor stroke(11%).Clinical follow-up was 27 months on ***-up digital subtraction angiography(average interval 15 months)showed complete aneurysm obliteration(88%)or dome occlusion with entry remnant(12%).The jailed MCA showed minimal or mild delay(primarily anterograde flow)in 75%of cases and significant delay(reliance primarily on ACA and external carotid artery collaterals)in 25%.Conclusions Covering the MCA with a flow diverting stent should be reserved for select rare *** attention to blood pressure augmentation during the periprocedural period is necessary to minimise potential ischaemic compromise.

关键词： primarily resort sided

Impact of metal polluted sewage water on soil nematode assemblages in agricultural settings of Aligarh,India

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Soil Ecology Letters 2024年第1期6卷 61-75页

作者： Mohammed F.S.A.Ghanem Shahid Afzal Humira Nesar zarrin Imran Wasim Ahmad Nematode Biodiversity Research Lab Department of ZoologyAligarh Muslim UniversityAligarh 202002India

Sewage water in agriculture threatens human health and soil ecosystems through metal *** show promise as bioindicators of soil health due to their abundance and position in soil food ***-polluted water decreased abundance of certain nematode groups and Sigma Maturity *** pollution positively affected nematode groups with r-selected life *** water has been inappropriately used in agriculture,posing possible threats to human health and the soil ecosystems by its constituent pollutants,especially heavy *** evaluation of its influences on soil biomes needs to consider the response of soil *** soil organisms,nematodes are seen as the best promising candidates for bioindicators of soil *** in,we collected soil samples from fresh water irrigated field from three sites(S1,S2 and S3)and sewage water irrigated distance gradient(5 m-40 m),to assess the influence of metal(Cu,Zn,Cd,Mn,Pb)polluted water on various characteristics of nematode *** results indicated that the heavy metals decreased the abundance of C-p3 nematodes,herbivores,and predatory nematodes as well as sigma maturity index,whereas,C-p1,C-p2,bacterivore and fungivore nematodes abundance and diversity positively responded to the metal ***,nematode genera with r-selected life cycle were positively affected and those with K-selected life cycle were negatively affected by metal *** nematode community has potential to be used as indicator of pollution stress in agricultural soils to check soil health and sustainability.

关键词： heavy metals sewage irigation agriculture nematodes bioindicators

Late Ordovician Mass Extinction: Earth, fire and ice

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National Science Review 2024年第1期11卷 51-65页

作者： david A.T.Harper Palaeoecosystems Group Department of Earth SciencesDurham University

The Late Ordovician Mass Extinction was the earliest of the ‘big’ five extinction events and the earliest to affect the trajectory of metazoan life. Two phases have been identified near the start of the Hirnantian period and in the middle. It was a massive taxonomic extinction, a weak phylogenetic extinction and a relatively benign ecological extinction. A rapid cooling, triggering a major ice age that reduced the temperature of surface waters, prompted a drop in sea level of some 100 m and introduced toxic bottom waters onto the shelves. These symptoms of more fundamental planetary processes have been associated with a range of factors with an underlying driver identified as volcanicity. Volcanic eruptions, and other products, may have extended back in time to at least the Sandbian and early Katian, suggesting the extinctions were more protracted and influential than hitherto documented.

关键词： Ordovician LOME paleoecology palaeobiogeography biotas

One-dimensional monotone nonautonomous dynamical systems

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Science China Mathematics 2024年第2期67卷 281-314页

作者： david Cheban Faculty of Mathematics and Computer Science Laboratory of Fundamental and Applied MathematicsMoldova State UniversityChisinau 2009Moldova

This work is devoted to the study of the dynamics of one-dimensional monotone nonautonomous(cocycle) dynamical systems. A description of the structures of their invariant sets, omega limit sets,Bohr/Levitan almost periodic and almost automorphic motions, global attractors, and pinched and minimalsets is given. An application of our general results is given to scalar differential and difference equations.

关键词： one-dimensional dynamics pinched and minimal sets global attractors monotone nonautonomous cocycle almost periodic solutions scalar differential/difference equations

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Kerogen Kinetic Distributions and Simulations Provide Insights into Petroleum Transformation Fraction (TF) Profiles of Organic-Rich Shales

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Journal of Earth Science 2024年第3期35卷 747-757页

作者： david A.Wood DWA Energy Limited Lincoln LN59JPUnited Kingdom

Two hundred and fifty single first-order Arrhenius reactions are simulated to generate S2 pyrograms at three heating rates 25,15,and 5°C·*** activation energy(E)and pre-exponential factor(A)of the reactions simulated follow a long-established trend of those variable values displayed by shales and *** characteristics of the transformation fraction(TF)profiles(product generation window temperatures)of the simulated single reactions are compared to the TF profiles of recorded shale pyrograms generated by multiple reactions with different E-A values lying near the defined E-A *** similarities and differences are observed between the TF profile values of the two *** similarities support the spread of E-A values involved in shale pyrogram best *** differences are most likely explained by the complexity of the multiple kerogen first-order and second-order reactions contributing to the recorded shale pyrograms versus the simplicity and crispness of the single first-order reactions *** results also justify the validity of using the previously described“variable E-A pyrogram-fitting method”of multi-heating-rate shale pyrograms enabling optimizers to choose multiple reactions from an unlimited range of E-A *** contrast,further doubt is cast on the validity of the constant-A pyrogram-fitting method used by the Easy%Ro technique,in that a distribution of reactions with a single A value is unlikely to represent the complex variety of kerogen macerals observed in shale *** profiles generated by the variable E-A pyrogram-fitting method lie close to the established E-A trend and are likely to provide more realistic TF generation window temperatures than TF profiles generated by the constant-A pyrogram-fitting method.

关键词： transformation fraction profiles simulated S2 pyrograms multiple heating rates kerogen/shale kinetics S2 pyrogram fitting techniques kerogen petroleum research.

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Analysis of ancient mass extinction recoveries in marine environments: generating strategies for managing outcomes of the current mass extinction

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National Science Review 2024年第1期11卷 8-10页

作者： david J.Bottjer Department of Earth Sciences University of Southern California

The defining feature of a mass extinction and its associated recovery is the global amount of extinction that occurred[1]. However, there is finer-scale detail to the story, as seen in the ongoing modern mass extinction(the sixth mass extinction), which exhibits variable effects among marine ecosystems and environments, and hence geographic areas [1].

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Current state-of-the-art review of footwear–ground friction

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Friction 2024年第10期12卷 2188-2204页

作者： david REBENDA Tomáš SÁHA Footwear Research Centre University InstituteTomas Bata University in ZlinZlin 76001Czech Republic Faculty of Mechanical Engineering Brno University of TechnologyBron 61600Czech Republic

The most important role of footwear is to ensure safe,functional walking,and foot *** the proper functionality of not only the work shoes,the anti-slip behavior of the shoe under various conditions and environments plays an important role in the prevention of slips,trips,falls,and consequent *** article is intended to review the current understanding of the frictional mechanisms between shoe outsoles and various counterfaces that impact the evaluation of outsole *** research focuses on the mechanisms driving outsole friction on different ground surfaces or the definition and description of parameters that influence outsole ***,the review discusses the effect of various surface contaminants on footwear ***,challenges and outlooks in the field of footwear outsoles are briefly mentioned.

关键词： shoe outsole composite slipperiness coefficient of friction(COF) adhesion safe walk