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雾霾对来京旅游者风险感知及旅游体验的影响

Diagenesis and its controls on reservoir quality of the Tambar oil field, Norwegian North Sea

旅游管理 2016年第1期

作者：李静 philip l.pearce 吴必虎 Alastair M.Morrison

2013年以来，中国雾霾业已成为国际性议题。文章从旅游者感知的视角出发，探究雾霾对旅游的影响，设计了旅游者雾霾风险感知量表，并借助SEM模型验证了雾霾感知、风险感知、满意度和忠诚度间的结构关系，且在通过模型稳定性检验的基础... 详细信息

2013年以来，中国雾霾业已成为国际性议题。文章从旅游者感知的视角出发，探究雾霾对旅游的影响，设计了旅游者雾霾风险感知量表，并借助SEM模型验证了雾霾感知、风险感知、满意度和忠诚度间的结构关系，且在通过模型稳定性检验的基础上，利用均值结构模型比较了中、外旅游者的雾霾感知、风险感知、满意度及忠诚度水平。结果证实：旅游者对雾霾旅游损害的感知主要体现在危害健康、破坏情绪、损害照片品质、降低景点吸引力和可游性等方面。雾霾风险感知会提升旅游风险感知的整体水平，并降低满意度；高旅游风险感知对满意度有负面影响；满意度对忠诚度的积极贡献在雾霾情境中得以验证；同时，雾霾感知和风险感知都借由中介变量间接削弱忠诚度。另外，除了满意度水平无显著差异外，外国旅游者的雾霾感知、风险感知和忠诚度水平均低于中国人。

关键词：雾霾旅游风险感知满意度忠诚度结构方程模型 smog tourist risk perception satisfaction loyalty SEM

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Energy Geoscience 2021年第1期2卷 10-31页

作者： Mohammed Bukar Richard H.Worden Shettima Bukar philip Shell Department of Earth and Ocean Sciences University of LiverpoolLiverpoolL693GPUK Department of Geology University of MaiduguriNigeria Saudi Aramco Al-DhahranEastern RegionSaudi Arabia

A study of the diagenetic evolution of the late Jurassic sandstones of the shallow marine facies in the Tambar oil field,Norwegian North Sea was carried out to understand its controls on reservoir *** samples and a set of wireline logs obtained from three wells were used to carry out petrographic studies including light optics and scanning electron microscopy,well log analysis,fluid inclusions,X-ray diffraction(XRD)for whole rock samples,clay mineral extracts and stable *** Tambar reservoir sandstones range mainly from siltstone to fine-grained sandstones,exclusively arkoses cemented mainly by microcrystalline quartz,euhedral quartz overgrowth,dolomite cement,illite and *** diagenetic/eodigenetic minerals include pyrite,calcite,and microcrystalline quartz and late diagenetic/mesodiagenetic minerals include quartz overgrowth,dolomite,illite and *** d18O values of dolomite cement in the Tambar sandstone reservoir range from11.77‰to3.57‰PDB,while the d13C values of the dolomite cement are from5.07‰to1.12‰*** temperature for fluid inclusions trapped in authigenic quartz fall between 130℃ and 169℃.The reservoir quality is controlled mainly by early formed grain-coating microcrystalline quartz that precipitated from the dissolution of sponge spicules which significantly inhibits quartz overgrowth *** emplacement do not show significant control on reservoir quality because considerable quartz cementation has taken place before the onset of major oil *** the coarse-grained sands show a correlation between quartz cement volume and water ***,the interpreted temperature for dolomite cementation is significantly higher for water leg-suggested effect of oil emplacement on the late ***-standing these controls on the reservoir quality will enhance the exploration strategy for the Tambar oil field.

关键词： Diagenesis Oil-inhibition Microquartz-inhibition Anomalous porosity Permeability

DTC-SVM-based Matrix Converter for a PMSM in a Vessel Electric Propulsion System

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DTC-SVM-based Matrix Converter for a PMSM in a Vessel Electr...

A Bioactivity Versus Ethnobotanical Survey of Medicinal Plants from Nigeria, West Africa

2009中国控制与决策会议

作者： C.l.philip Chen College of Engineering the University of Texas at San AntonioTX 78249USA MemberIEEE

＜正＞This paper addresses the control technology of Matrix Converter for a Permanent Synchronous Motor（PMSM） in a vessel electric propulsion *** paper provides an algorithm based on flux linkage reference model,double space vector modulation（DSVM）,and Direct Torque Control（DTC） *** PMSM is controlled by the DTC theory with double space vector *** experiment result has shown that the drives control system has fast and stabilized performance under sudden load varying and four-quadrant running *** the energy in the design system can flow in both directions,the compound control strategy is effective and feasible.

关键词： Paper Instruction Chinese Control Conference

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Natural Products and Bioprospecting 2014年第1期4卷 1-19页

作者： lydia l.lifongo Conrad V.Simoben Fidele Ntie-Kang Smith B.Babiaka philip N.Judson Chemical and Bioactivity Information Centre Department of ChemistryFaculty of ScienceUniversity of BueaBueaCameroon Chemical and Bioactivity Information Centre 22-23 Blenheim TerraceWoodhouse LaneLeeds LS29HDUK Chemical and Bioactivity Information Centre Granary Wharf House2 Canal WharfLeeds LS115PYUK

Traditional medicinal practices play a key role in health care systems in countries with developing *** aim of this survey was to validate the use of traditional medicine within local Nigerian *** this review,we examine the ethnobotanical uses of selected plant species from the Nigerian flora and attempt to correlate the activities of the isolated bioactive principles with known uses of the plant species in African traditional ***-three(33)plant species were identified and about 100 out of the 120 compounds identified with these plants matched with the ethnobotanical uses of the plants.

关键词： African traditional medicine Bioactivity Ethnobotany Medicinal plants Nigeria

Scoping review of cochlear implantation in Susac’s syndrome

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World Journal of Otorhinolaryngology-Head and Neck Surgery 2021年第9期7卷 126-132页

作者： philip l.Perez Andrew A.McCall Barry E.Hirsch Department of Otolaryngology University of PittsburghPittsburghPA15213USA

Objective:Scoping review of published literature to establish clinical characteris tics and audiologic outcomes in patients diagnosed with Susac’s Syndrome(SS)who have undergone cochlear implantation(CI).Data sources:All published studies of CI in SS and contribution of two of our own patients who have not been reported ***:A comprehensive search of MEDlINE(via PubMed)was carried out in March 2020 using the following keywords and related entry terms:Susac's Syndrome,Cochlear ***:Our search identified a total of five case reports of CI in *** the addition of our two patients reported here,we analyzed characteristics and outcomes in seven *** age at implantation was 30 years old(range 19-46),with six women and one man *** time from onset of hearing loss to implantation was 17 months(range three months to four years).Best reported postoperative speech understanding was reported via different metrics,with six of seven patients achieving open set speech scores of 90% or better,and one subject performing at 68%.Vestibular symptoms were present preoperatively in four of seven patients(57%),with vestibular testing reported in two patients,and showing vestibulopathy in one *** complications were reported following cochlear ***:Cochlear implantation is a viable option for hearing rehabilitation in patients with SS,with levels of attainment of open set speech comparable to other populations of CI candidates.

关键词： Susac's syndrome Cochlear implantation Scoping review

High-flow oxygen via oxygenating mouthguard in short upper gastrointestinal endoscopy:A randomised controlled trial

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World Journal of Gastrointestinal Endoscopy 2022年第12期14卷 777-788页

作者： Kim Hay Be leonardo Zorron Cheng Tao Pu Brett pearce Matthew lee luke Fletcher Rebecca Cogan philip Peyton Rhys Vaughan Marios Efthymiou Sujievvan Chandran Department of Gastroenterology and Hepatology Austin HealthHeidelberg 3084VictoriaAustralia Department of Anaesthesia and Pain Medicine Austin HealthHeidelberg 3084VictoriaAustralia Faculty of Medicine Dentistry and Health SciencesUniversity of MelbourneParkville 3010VictoriaAustralia

BACKGROUND Anaesthetic care during upper gastrointestinal(GI)endoscopy has the unique challenge of maintaining ventilation and oxygenation via a shared upper *** oxygen is recommended by international society guidelines,however,the optimal route or rate of oxygen delivery is not *** oxygen delivery devices have been investigated to improve oxygenation during upper GI endoscopy,however,these are limited by commercial availability,costs and in some cases,the expertise required for *** at our centre,higher flows of supplemental oxygen can safely be delivered via an oxygenating mouthguard routinely used during upper GI endoscopic *** To assess the incidence of hypoxaemia(SpO2lemental oxygen using an oxygenating mouthguard at 20 l/min flow compared to standard nasal cannula(SNC)at 2 l/min *** A single centre,prospective,randomised clinical trial at two sites of an Australian tertiary hospital between October 2020 and September 2021 was *** undergoing elective upper gastrointestinal endoscopy under deep sedation were randomised to receive supplemental oxygen via high-flow via oxygenating mouthguard(HFMG)at 20 l/min flow or SNC at 2 l/min *** primary outcome was the incidence of hypoxaemia of any duration measured by pulse ***-related,procedural-related,and sedation-related adverse events and patient-reported outcomes were also *** Three hundred patients were *** patients were excluded after randomisation.292 patients were included in the intention-to-treat *** incidence of hypoxaemia was significantly reduced in those allocated *** patients(4.4%)allocated to HFMG experienced an episode of hypoxaemia,compared to thirty-four(22.1%)patients allocated to SNC(P value<0.001).No significant difference was observed in the rates of adverse events or patient-reported outcome meas

关键词： Upper gastrointestinal endoscopy Supplementary oxygen Hypoxaemia Oxygenating mouthguard

Chemically derived graphene quantum dots for high-strain sensing

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Journal of Materials Science & Technology 2023年第10期141卷 110-115页

作者： Shujun Wang Francesco lenzini Dechao Chen philip Tanner Jisheng Han David Thiel Mirko lobino Qin li Queensland Miro-and Nanotechnology Centre Griffith UniversityNathan CampusBrisbane QLD 4111Australia School of Engineering and Built Environment Griffith UniversityNathan CampusBrisbane QLD 4111Australia Centre for Quantum Dynamics Griffith UniversityNathan CampusBrisbane QLD 4111Australia Department of Industrial Engineering University of Trento38122Italy

Graphene quantum dots(GQDs)refer to graphene fragments with a lateral dimension typically less than 100 nm,which possess unique electrical and optical properties due to the quantum confinement *** this study,we demonstrate that chemically derived graphene quantum dots show great potential for making highly stretchable and cost-effective strain sensors via an electron tunneling ***-able strain sensors are critical devices for the field of flexible or wearable electronics which are expected to maintain function up to high strain values(>30%).However,strain sensors based on conventional materials(*** or semiconductors)or metal nanoparticles(*** or silver nanoparticles)only work within a small range of strain(*** former have a working rangelatterly dropcasting solution-processed GQDs between the interdigitated electrodes on polydimethylsiloxane,we obtained devices that can function in the range from 0.06%to over 50%ten-sile strain with both the sensitivity and working range conveniently adjustable by the concentration of GQDs *** study provides a new concept for practical applications of GQDs,revealing the poten-tial of this material for smart applications such as artificial skin,human-machine interfaces,and health monitoring.

关键词： Graphene quantum dots Graphene Strain Sensor Electron tunneling

Microbial communities biostimulated by ethanol during uranium （VI） bioremediation in contaminated sediment as shown by stable isotope probing

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Frontiers of Environmental Science & Engineering 2015年第3期9卷 453-464页

作者： Mary Beth lEIGH Wei-Min WU Erick CARDENAS Ondrej UHlIK Sue CARROll Terry GENTRY Terence l. MARSH Jizhong ZHOU philip JARDINE Craig S. CRIDDlE James M. TIEDJE Center for Microbial Ecology Michigan State University East Lansing MI 48824 USA Institute of Arctic Biology University of Alaska Fairbanks Fairbanks AK 99775 USA Department of Civil and Environmental Engineering Center for Sustainable Development & Global Competitiveness Codiga Resource Recovery Center Stanford University Stanford CA 94305-4020 USA Department of Biochemistry and Microbiology Institute of Chemical Technology Prague Technicka 3 166 28 Prague Czech Republic Environmental Sciences Division Oak Ridge National Laboratory Oak Ridge TN 37831 USA Department of Botany and Microbiology University of Oklahoma Norman OK 73019 USA Department of Crop and Soil Sciences Texas A&M University College Station TX 77843 USA

Stable isotope probing （SIP） was used to identify microbes stimulated by ethanol addition in microcosms containing two sediments collected from the bioremediation test zone at the US Department of Energy Oak Ridge site, TN, USA. One sample was highly bioreduced with ethanol while another was less reduced. Microcosms with the respective sediments were amended with ^13C labeled ethanol and incubated for 7 days for SIP. Ethanol was rapidly converted to acetate within 24h accompanied with the reduction of nitrate and sulfate. The accumulation of acetate persisted beyond the 7 d period. Aqueous U did not decline in the microcosm with the reduced sediment due to desorption of U but continuously declined in the less reduced sample. Microbial growth and concomitant 13C-DNA production was detected when ethanol was exhausted and abundant acetate had accumulated in both microcosms. This coincided with U（VI） reduction in the less reduced sample. I3C originating from ethanol was ultimately utilized for growth, either directly or indirectly, by the dominant microbial community members within 7 days of incubation. The microbial community was comprised predominantly of known denitrifiers, sulfate-reducing bacteria and iron （Ⅲ） reducing bacteria including Desulfovibrio, Sphingomonas, Ferribacterium, Rhodanobacter, Geothrix, Thiobacillus and others, including the known U（VI）-redueing bacteria Acidovorax, Anaeromyxobacter, Desulfovibrio, Geobac- ter and Desulfosporosinus. The findings suggest that ethanol biostimulates the U（VI）-reducing microbial com- munity by first serving as an electron donor for nitrate, sulfate, iron （IH） and U（VI） reduction, and acetate which then functions as electron donor for U（VI） reduction and carbon source for microbial growth.

关键词： Stable isotope probing (S/P) ethanol acetate uranium reduction sediment bioremediation

Trends in gastrointestinal disease hospitalizations and outcomes during the first year of the coronavirus pandemic

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World Journal of Gastroenterology 2023年第4期29卷 744-757页

作者： Ayooluwatomiwa Deborah Adekunle Muni Rubens Mary Sedarous Tahniyat Tariq philip N Okafor Division of Internal Medicine St.Luke's HospitalChesterfieldMI 63017United States Office of Clinical Research Miami Cancer InstituteMiamiFL 33176United States Division of Internal Medicine McMaster UniversityHamilton ON L8S 4L8OntarioCanada Division of Gastroenterology Stanford University School of MedicineRedwood CityCA 94063United States Division of Gastroenterology Stanford University College of MedicineRedwood CityCA 94063United States

BACKGROUND The impact of the coronavirus on hospitalizations for gastrointestinal(GI)disease,particularly at a population level is *** To investigate trends in hospitalizations,inpatient endoscopy resource utilization,and outcomes during the first year of the coronavirus pandemic and subsequent *** Using the California State Inpatient Database for 2018-2020,we explored year-toyear and 2020 month-to-month trends in hospitalizations,length of stay,and inpatient mortality(all-cause&viral pneumonia-specific)for common inpatient GI diagnoses including acute pancreatitis,diverticulitis,cholelithiasis,noninfectious gastroenteritis,upper and lower GI bleeding(lGIB),Clostridium difficile,viral gastroenteritis,inflammatory bowel disease,and acute *** Disease-specific hospitalizations decreased for all included conditions except nonvariceal upper GI bleeding(NVUGIB),lGIB,and ulcerative colitis(UC)(ptrendllcause inpatient mortality was higher in 2020 vs 2019,for acute pancreatitis(P=0.029),diverticulitis(P=0.04),NVUGIB(P=0.003),and Crohn’s disease(P=0.004).In 2020,hospitalization rates were lowest in April,November,and *** was no significant corresponding increase in inpatient mortality except in UC(ptrend=0.048).Viral pneumonia and viral pneumonia complicated by respiratory failure increased(Plization within 24 h of admission was unchanged for GI emergencies except NVUGIB(PlUSION Our findings suggest that hospitalization rates for common GI conditions significantly declined in California during the COVID pandemic,particularly in April,November and December *** mortality was significantly higher among acute pancreatitis,diverticulitis,NVUGIB,and Crohn’s disease *** endoscopy rates were mostly comparable between 2020 and 2019.

关键词： COVID-19 Shelter-in-place Procedure utilization Outcomes Hospitalizations Gastrointestinal diseases