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使用Mg(OH)2浆液在鼓泡塔中捕集烟气中低浓度cO2的研究

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环境工程 2014年第S1期32卷 395-398页

作者：周向张传波王秀艳 tim c.keener 中冶京诚工程技术有限公司北京100176 辛辛那提大学美国俄亥俄45220

Mg(OH)2浆液是一种具备低再生能耗潜力的cO2吸收剂,为了推进其在cO2捕集领域的应用,展开本研究。在鼓泡塔中,使用真实烟气,研究了各种操作条件下Mg(OH)2浆液对低浓度cO2的捕集效率。研究发现良好的布气、较高浓度的Mg(OH)2浆液、更长的... 详细信息

Mg(OH)2浆液是一种具备低再生能耗潜力的cO2吸收剂,为了推进其在cO2捕集领域的应用,展开本研究。在鼓泡塔中,使用真实烟气,研究了各种操作条件下Mg(OH)2浆液对低浓度cO2的捕集效率。研究发现良好的布气、较高浓度的Mg(OH)2浆液、更长的名义停留时间,均能有效提高cO2捕集效果;增加气体名义液气比对捕集效果的改善作用较小;入口cO2浓度对捕集效率几乎没有影响。cO2-Mg(OH)2传质系统是液相侧阻力控制,但是鼓泡塔能有效降低这种阻力,取得较高的捕集效率。在较佳的操作条件下,Mg(OH)2浆液在鼓泡塔中能取得90%左右的cO2捕集效率。

关键词：鼓泡塔二氧化碳捕集氢氧化镁操作参数

The role of extracorporeal life support and timing of repair in infants with congenital diaphragmatic hernia

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World Journal of Pediatric Surgery 2024年第2期7卷 90-99页

作者： Daniel B Gehle Logan c Meyer tim Jancelewicz Le Bonheur children's Hospital University of Tennessee Health Science CenterMemphisTennesseeUSA

Extracorporeal life support(EcLS)serves as a rescue therapy for patients with congenital diaphragmatic hernia(cDH)and severe cardiopulmonary failure,and only half of these patients survive to *** costly intervention has a significant complication risk and is reserved for patients with the most severe disease physiology refractory to maximal cardiopulmonary *** contraindications to EcLS do exist such as coagulopathy,lethal chromosomal or congenital anomaly,very preterm birth,or very low birth weight,but many of these limits are being evaluated through further *** guidelines from the past decade vary in recommendations for EcLS use in patients with cDH but this therapy appears to have a survival benefit in the most severe subset of *** outcomes have been observed for patients treated at high-volume *** review details the evolving literature surrounding management paradigms for timing of cDH repair for patients receiving preoperative *** recent data support early repair following cannulation to avoid non-repair which is uniformly fatal in this *** EcLS runs are associated with decreased survival,and patient physiology should guide EcLS weaning and eventual decannulation rather than limiting patients to arbitrary run *** of care across centers is a major focus to limit unnecessary costs and improve short-term and long-term outcomes for these complex patients.

关键词： congenital life repair

Open Scrotal Trauma complicated by Testicular Evisceration: An Unusual Injury after a Brawl in 2 cases

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Open Journal of Urology 2024年第5期14卷 282-289页

作者： Atangana cédric Paterson Savom Eric Patrick tim Fabrice Dikongue Diwondi Audrey Ngapanya Youssofa Etobe cécile Akoa Manga Ismael Fodoung Wamba Danny Bang Guy Aristide Faculty of Medicine and Biomedical Sciences University of Yaounde I Yaound&#233 Cameroon Department of Surgery General Hospital Yaounde Yaounde Cameroon Department of Visceral Surgery Yaound&#233 Central Hospital Yaounde Cameroon Faculty of Health Sciences University of Bamenda Bamenda Cameroon Department of Surgery Yaound&#233 University Hospital Yaounde Cameroon

Background: Scrotal trauma is a rare injury, and can compromise reproductive function. If in closed trauma, a morphological assessment of the lesion is usually necessary before treatment, in open trauma otherwise, namely in the case of testicular evisceration, surgical exploration is the rule. Objective: To present the management of open scrotal trauma. case Presentation: These were two adults aged 42 and 63, admitted for post-traumatic testicular evisceration. One of the patients presented with signs of infection due to a diagnosis delay. Management consisted on surgical exploration, with scrotal debridement and testicular reintegration. The evolution was favourable. conclusion: Open scrotal trauma is a rare lesion that can cause testicular evisceration. It requires surgical exploration, which should be systematic.

关键词： Scrotal Trauma Testicular Evisceration Infection Surgical Exploration

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湍球塔捕集烟气中低浓度二氧化碳特性

化工学报 2011年第11期62卷 3269-3275页

作者：周向 LEI cheng tim c. keener 宋存义北京科技大学土木与环境工程学院北京100083 辛辛那提大学美国俄亥俄45220

引言全球温度逐步上升已经是个不容否认的事实[1],政府间气候变化专门委员会(IPcc,intergovernmental panel on climate change)《2007年气候变化报告》[2]指出温室效应主要是人类活动造成,而且化石燃料燃烧排放的cO2对温室效应贡献率达... 详细信息

引言全球温度逐步上升已经是个不容否认的事实[1],政府间气候变化专门委员会(IPcc,intergovernmental panel on climate change)《2007年气候变化报告》[2]指出温室效应主要是人类活动造成,而且化石燃料燃烧排放的cO2对温室效应贡献率达到56.5%。

关键词：湍球塔低浓度cO2 cO2捕集液气比

The Dallas Donation after circulatory Death Transplantation Summit:expanding donation after circulatory death procedures through process improvement,broader utilization,and innovation

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Hepatobiliary Surgery and Nutrition 2024年第5期13卷 824-836,I0009页

作者： Michele Finotti Anji Wall Anthony D’Alessandro Gary Schwartz chris Sonnenday David Goldberg Ashish Shah Peter Friend Jeff P.Orlowski Greg McKenna Steve Newton Brad Adams William c.chapman Amit Mathur Marwan Abouljoud tim Pruett Amelia Hessheimer James F.Trotter Sumeet K.Asrani Giuliano Testa Simmons Transplant Institute Baylor University Medical CenterDallasTXUSA Hepatobiliary and General Surgery Unit Regional Hospital TrevisoDISCOGUniversity of PaduaPaduaItaly Division of Transplantation Department of SurgeryUniversity of Wisconsin School of Medicine and Public HealthMadisonWIUSA Department of Thoracic Surgery and Lung Transplantation Baylor University Medical CenterCenter for Advanced Heart and Lung DiseaseDallasTXUSA Department of Surgery University of MichiganAnn ArborMIUSA Division of Digestive Health and Liver Diseases Department of MedicineUniversity of Miami Miller School of MedicineMiamiFLUSA Department of cardio-Thoracic Surgery Vanderbilt University Medical CenterNashvilleTNUSA Nuffield Department of Surgical Sciences University of OxfordOxfordUK LifeShare Transplant Donor Services of Oklahoma Oklahoma CityOKUSA Administration Baylor University Medical CenterDallasTXUSA Southwest Transplant Alliance DallasTXUSA Department of Surgery/Transplantation Washington UniversitySt.LouisMOUSA Division of Transplant Surgery Department of SurgeryMayo Clinic ArizonaAlix School of MedicinePhoenixAZUSA Divisions of Transplant and Hepatobiliary Surgery Henry Ford HospitalDetroitMIUSA Department of Surgery University of MinnesotaMinneapolisMNUSA General and Digestive Surgery Hospital Universitario La PazIdiPAZMadridSpain

Despite a significant increase in utilization over the past decade,the number of donation after circulatory death(DcD)organs that are procured and transplanted in the United States(US)remains well below its *** is still room for expansion,as utilizing DcD organs to the fullest extent is currently the most viable solution to the persistent mismatch between supply and demand in *** convened a multidisciplinary transplantation summit to examine various aspects of DcD,with faculty members from around the world with clinical and academic interest in DcD donation and transplantation,including abdominal and cardiothoracic surgeons,organ procurement organization directors,hepatologists,and *** conference focused on identifying barriers to DcD organ utilization and strategies to overcome these *** divide the barriers to DcD utilization into three mains categories:(Ⅰ)policy and process variation;(II)logistical and transportation challenges;and(Ⅲ)higher risk perceptions related to DcD *** each barrier,we proposed a variety of solutions,providing an overview of the status of DcD donation in the US and suggestions on how to increase the use of *** is a specific focus on ex situ machine perfusion,normothermic regional perfusion,and other opportunities to expand DcD utilization without negatively impacting recipient outcomes.

关键词： Donation after circulatory death donation(DcD donation) marginal graft donor pool machine perfusion(MP)

Background Soil Mercury: An Unrecognized Source of Blood Mercury in Infants?

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Open Journal of Soil Science 2013年第1期3卷 23-29页

作者： Pamela F. Heckel tim c. keener Grace K. LeMasters college of Engineering and Applied Science University of Cin- cinnati Cincinnati USA. college of Medicine University of Cincinnati Cincinnati USA college of Medicine University of Cincinnati Cincinnati USA

Introduction: During the past four decades, mercury (Hg) research focused on fish consumption has explained less than 22% of Hg in human blood. One overlooked exposure pathway for infants and young children is the concentration of Hg in soils. Although 75% of the U.S. population lives in urban areas near industrial facilities, minimal data exist regarding the concentration and speciation of Hg in residential soils. chronic exposure through ingestion of low concentrations of Hg in soils may explain a portion of the blood Hg levels noted in infants. Methods: Three relatively unexposed residential sites in a suburban community were selected. The primary route of contamination was atmospheric deposition. Soils were digested in a nitric acid-hydrofluoric acid solution and analyzed by cold vapor atomic absorption spectrophotometry. Measured concentrations of total Hg in local suburban soil samples were compared to levels measured in a national study of 27 remote and rural sites. The Al-Shahristani pharmacokinetic model, developed after the 1971 Iraqi Methyl Hg poisoning incident, was used to calculate the blood Hg concentration in a hypothetical year-old infant. Results: Soil samples contained Hg concentrations ranging from 0.01 to 0.24 ppmw. The distribution of Hg in the soil samples was non-linear and non-normal. The mean soil Hg concentrations at the three locations were 0.08, 0.05 and 0.08 ppm. calculated blood Hg concentrations for a 10 kg, year-old infant due to ingestion of soil (200 mg/day) containing 0.2, 0.4 and 0.8 ppm Hg were 0.08, 0.17 and 0.26 μg/L, respectively. conclusions: The pilot study data appear to support the hypothesis that chronic, low-level soil ingestion may be a significant source of Hg for infants. Further study is warranted.

关键词： Mercury Blood Mercury Pharmacokinetics Air Toxics

A framework for the extended evaluation of ABAc policies

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cybersecurity 2019年第1期2卷 117-137页

作者： charles Morisset tim A.c.Willemse Nicola Zannone Newcastle University NewcastleTyneUK Eindhoven University of Technology P.O.Box 5135600 MBEindhovenNetherlands

A main challenge of attribute-based access control(ABAc)is the handling of missing *** studies have shown that the way standard ABAc mechanisms,*** on XAcML,handle missing information is flawed,making ABAc policies vulnerable to attribute-hiding *** work has addressed the problem of missing information in ABAc by introducing the notion of extended evaluation,where the evaluation of a query considers all queries that can be obtained by extending the initial *** method counters attribute-hiding attacks,but a na飗e implementation is intractable,as it requires an evaluation of the whole query *** this paper,we present a framework for the extended evaluation of ABAc *** framework relies on Binary Decision Diagram(BDDs)data structures for the efficient computation of the extended evaluation of ABAc *** also introduce the notion of query constraints and attribute value power to avoid evaluating queries that do not represent a valid state of the system and to identify which attribute values should be considered in the computation of the extended evaluation,*** illustrate our framework using three real-world policies,which would be intractable with the original method but which are analyzed in seconds using our framework.

关键词： Attribute-based access control Policy evaluation Missing attributes Attribute power Attribute-hiding attacks

The Flemish Performance-based Research Funding System: A Unique Variant of the Norwegian Model

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Journal of Data and Information Science 2018年第4期3卷 45-60页

作者： tim c.E.Engels Raf Guns centre for R&D Monitoring (EcOOM) Faculty of Social Science University of Antwerp

The BOF-key is the performance-based research funding system that is used in Flanders, Belgium. In this paper we describe the historical background of the system, its current design and organization, as well as its effects on the Flemish higher education landscape. The BOFkey in its current form relies on three bibliometric parameters: publications in Web of Science, citations in Web of Science, and publications in a comprehensive regional database for SSH publications. Taken together, the BOF-key forms a unique variant of the Norwegian model: while the system to a large extent relies on a commercial database, it avoids the problem of inadequate coverage of the SSH. Because the bibliometric parameters of the BOF-key are reused in other funding allocation schemes, their overall importance to the Flemish universities is substantial.

关键词： Performance-based research funding systems Flanders(Belgium) Norwegian model Web of Science VABB-SHW

Understorey species distinguish late successional and ancient forests after decades of minimum human intervention: A case study from Slovenia

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Forest Ecosystems 2023年第1期10卷 92-101页

作者： Mirjana Sipek tim Ravnjak Nina Sajna University of Maribor Faculty of Natural Sciences and MathematicsKoroska c.1602000MariborSlovenia

The main species composition drivers in temperate deciduous forests are environmental conditions, a stand?s age and the site history, e.g., the succession stage and past land use, as well as disturbance regime and current management. We compared plant species diversity and composition in late successional and ancient forests, cooccurring on the same small river island applying species accumulation curves and nonmetric multidimensional scaling, respectively. Given the island?s geomorphological characteristics, we expected these to be very similar before human intervention in the past. The forests experienced differing disturbance regimes in the past, while over the last 30 years, human intervention has been the same and reduced to a minimum. The ancient forest in this study had two major characteristics defining it as old, mature forest: continuity of presence for more than 200years and specific composition. The late successional forest experienced major disturbance in the 20th century and was allowed natural regeneration by bordering on the ancient forest, representing a potential species pool,and by decades of minimum human intervention. Our results showed that, even though there was no difference in species richness, we could still detect differences between the forests, particularly in the abundance and species composition of the understorey, among which geophytes had the most indicative importance. To make our results useful on a broader scale, we composed from the literature a species list of plants indicative for ancient forest and tested its application. These results are important for distinguishing between old and mature secondary stands and particularly for identifying old forest stands, which should be conserved and, in the case of fragmented landscapes, included in a network connecting forest fragments.

关键词： Forest community Successional forest Indicator plants Plant diversity Understorey Geophytes