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Journal of Geoscience and Environment Protection 2022年第1期10卷 13-28页

作者： Stephen Twumasi Annan Bright Frimpong collins Owusu-Fordjour Bismark Yeboah Boasu Department of Integrated Science Education Faculty of Science Education University of Education Winneba Ghana Department of Programmes Planning Monitoring and Evaluation Environmental Protection Agency Accra Ghana Department of Environment and Resource Studies SD Dombo University of Business and Integrated Development Studies Wa Ghana

The study assesses the quality of hand dug wells in relation to distance from soakaway septic tanks in three selected peri-urban communities in the Ga west municipality near Accra, Ghana. water quality analyses of bio-physico-chemical variables (pH, Temperature, EC, turbidity, DO, BOD, TSS, TDS, sodium, potassium, nitrate, nitrite, ammonia, sulphate, chloride, salinity, total alkalinity, total coliform, fecal coliforms and isolation of E. coli) were determined. Concentrations of the major nutrient anion sulphate, nitrate, phosphate, and chlorides in water samples at distances between 0 - 30 m radial distances from the septic tank were above the WHO permissible limit of drinking water compared to the control. All the water samples had high fecal and total coliform counts that exceeded the international standard of 0 per 100 mL of potable water with counts ranging from 0 - 143 cfu/100 ml and 53 - 463/100 ml for FC and TC respectively. High fecal coliform and detection of E. coli in most samples is an indication of fecal pollution possibly from their close proximity to soak away septic sewage. The high nutrient levels detected in samples at distances between 0 - 30 mily:"">m as compared to the controls may a

关键词： Groundwater water Quality Localized Contamination Peri-Urban

Otolaryngology residency program factors associated with female resident representation

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world Journal of Otorhinolaryngology-Head and Neck Surgery 2024年第1期10卷 7-11页

作者： Julia E.Canick James C.Campbell Charles R.woodard Lars J.Grimm Alissa m.collins Duke University School of medicine DurhamNorth CarolinaUSA Department of Head and Neck Surgery&Communication Sciences Duke University School of MedicineDurhamNorth CarolinaUSA Department of Radiology Duke University School of MedicineDurhamNorth CarolinaUSA

Objective:Female representation in the field of otolaryngology is *** is the first point at which medical school graduates specialize in a chosen field and thus represents an opportunity to recruit and train more female *** study sought to identify program factors associated with greater female representation among resident ***:Departmental websites of all 124 otolaryngology residency programs in the United States and Puerto Rico were examined for a list of *** programs with a resident roster available,the genders of residents,faculty,program directors,and chairpersons were *** and city population for each program.w.s also recorded,as was female resident *** were compared using Pearson Chi‐squared univariate ***:1,632 residents and 2,605 faculty were included in the analysis of 109 *** median female resident representation was 40%.Programs with larger faculty sizes,more female faculty,and urban location were associated with an above‐median female resident *** with a larger residency cohort approached significance regarding above‐median female resident *** female faculty representation,program director gender,chairperson gender,and US region were not associated with variation in female resident ***:Greater female otolaryngology residency representation was associated with programs having an urban location and greater numbers of female and total *** was also likely that a larger resident cohort size may affect female resident *** proportions of female faculty,program director,and chairperson gender,as well as the US region,were not associated with variation in female resident gender representation.

关键词： gender program director recruitment residency training

抗血管生成药物Endostatin作用下肿瘤血液灌注数值研究

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抗血管生成药物Endostatin作用下肿瘤血液灌注数值研究

multi-hazard socio-physical resilience assessment of hurricane-induced hazards on coastal communities

第九届全国生物力学学术会议

作者：张洪一吴洁蔡彦林原许世雄 Quan Long m.w.collins 复旦大学力学与工程科学系复旦大学附属肿瘤医院 Brunel University UxbridgeMiddlesexUK

肿瘤生长分为无血管期(avascular phase)和血管期(vascular phase)两个阶段,中间是较短的新生血管生长期(angiogenesis)。处于无血管期的早期肿瘤,依靠附近血管物质的扩散获得养份供给(主要是氧)。进入血管期后,新生的血管为肿瘤细胞的...

肿瘤生长分为无血管期(avascular phase)和血管期(vascular phase)两个阶段,中间是较短的新生血管生长期(angiogenesis)。处于无血管期的早期肿瘤,依靠附近血管物质的扩散获得养份供给(主要是氧)。进入血管期后,新生的血管为肿瘤细胞的转移提供了新的渠道,丰富的血液灌注将为肿瘤生长提供充足的养份。

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Resilient Cities and Structures 2023年第2期2卷 67-81页

作者： Omar m.Nofal Kooshan Amini Jamie E.Padgett John w.van de Lindt Nathanael Rosenheim Yousef m.Darestani Amin Enderami Elaina J.Sutley Sara Hamideh Leonardo Duenas-Osorio Florida International University MiamiFLUnited States Rice University HoustonTXUnited States Colorado State University Fort CollinsCOUnited States Texas A&m University College StationTXUnited States michigan Technological University HoughtonMIUnited States The University of Kansas LawrenceKSUnited States Stony Brook Stony Brook UniversityNYUnited States

Hurricane-induced hazards can result in significant damage to the built environment cascading into major impacts to the households,social institutions,and local *** quantifying physical impacts of hurricane-induced hazards is essential for risk analysis,it is necessary but not sufficient for community resilience *** there have been several studies on hurricane risk and recovery assessment at the building-and community-level,few studies have focused on the nexus of coupled physical and social disruptions,particularly when char-acterizing recovery in the face of coastal ***,this study presents an integrated approach to quantify the socio-physical disruption following hurricane-induced multi-hazards(e.g.,wind,storm surge,wave)by considering the physical damage and functionality of the built environment along with the population dynamics over ***,high-resolution fragility models of buildings,and power and transportation infrastructures capture the combined impacts of hurricane loading on the built *** simulat-ing recovery by tracking infrastructure network performance metrics,such as access to essential facilities,this coupled socio-physical approach affords projection of post-hazard population dislocation and temporal evolution of housing and household recovery constrained by the building and infrastructure *** results reveal the relative importance of multi-hazard consideration in the damage and recovery assessment of communities,along with the role of interdependent socio-physical system modeling when evaluating metrics such as housing recovery or the need for emergency ***,the methodology presented here provides a foundation for resilience-informed decisions for coastal communities.

关键词： Fragility analysis Hurricane damage Probabilistic damage assessment Transportation network Power network Housing recovery population impacts

高海拔下锌的高浸出率——谢里特为中国西部矿业公司进行的锌氧压浸出研究

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中国有色冶金 2009年第3期38卷 16-21页

作者： m.J.collins R.J.Kalanchey I.m.masters N.E.Tuffrey 杨征谢里特国际公司西部矿业股份有限公司青海西宁811600

西部矿业(wmC)甘河精炼厂海拔高,wmC矿山生产的精矿含铁高,这两点是wmC为其新的锌精炼厂选择氧压浸出工艺的关键因素。谢里特公司在萨斯喀彻温堡用wmC从中国青海省提供的精矿样品进行了氧压浸出试验,本论文描述了该试验的结果。小型间... 详细信息

西部矿业(wmC)甘河精炼厂海拔高,wmC矿山生产的精矿含铁高,这两点是wmC为其新的锌精炼厂选择氧压浸出工艺的关键因素。谢里特公司在萨斯喀彻温堡用wmC从中国青海省提供的精矿样品进行了氧压浸出试验,本论文描述了该试验的结果。小型间断氧压浸出试验和四天连续扩大试验的结果都进行了报告。连续扩大试验包括两段氧压浸出、中和及除铁的连续操作,产出无铁硫酸锌溶液。氧压浸出取得了大于98%的锌浸出率,同时产出含有约9 g/L硫酸和2 g/L铁的溶液。中和及除铁后,溶液约含170g/L锌和mg/L的铁。从锌精矿原料到元素硫副产品的总硫回收率约为85%,从中和渣中可回收原料中75～80%的铟。试验结果显示了谢里特锌氧压浸出工艺的技术和经济优势,并且为工程设计提供了所需数据。

关键词：氧压浸出高海拔高铁锌精矿高浸出率

Nitrogen Derivatives of Irrigation in Chihuahua＇s Parks with wastewater Treatment Residuals

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Journal of Environmental Science and Engineering 2011年第4期5卷 392-399页

作者： C.J. Navarro-Gemez E. Herrera-Peraza V. collins-martinez m.S. Espino-Valdes C. Barraza-Bolivar Department of Environmental and Energy Center for Advanced Materials Research S.C Chihuahua Chih 31109 Mexico Faculty of Engineering The University Autonomy of Chihuahua Chihuahua Chih 31000 Mexico

Since 2000 Chihuahua City has distribution system.w.ste water Treatment （wTR）, watering city＇s green areas. The need to cover the growing demand for drinking water has encouraged the use of non-potable water where water quality is not an issue despite being used by 10 years ago, it is not known whether nitrogen compounds derived from.w.R pose risks to the environment and public health. Therefore, in order to minimize health and environmental risks, this is needed to assess the impact and policy support for water use. The aim of this study is to determine the constitution and the concentration of nitrogen compounds through selection and characterization of park＇s representative. It＇s divided into physical properties and main parameters that affect nitrogen transformations. It was determined that sand was material that allowed more favorable oxidation and reduction of nitrate in soil and atmosphere, opposite of the clay, when used wTR, nitrates, nitrites and ammonia nitrogen were identified in the subsurface and NOx and N20 were identified in the atmosphere. when drinking water was used, none of these compounds was found. However, it was determined that despite having high concentrations of nitrates, the wTR was within the limits allowed by the mexican standard for the use of wTR in public places.

关键词： wastewater treatment oxide nitrous nitrate unsaturated zone.

球形实体肿瘤中大分子药物输运模型的初步研究

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球形实体肿瘤中大分子药物输运模型的初步研究

Towards predicting biochar impacts on plant-available soil nitrogen content

2005年上海市生物医学工程学会学术年会

作者：浏丹许世雄王庆伟 m.w.collins 赵改平吴洁上海市复旦大学力学与工程科学系 School of Engineering Systems and Design South Bank UniversityLondonUK

本文建立一个由正常组织包围的球形实体肿瘤模型来研究其中的药物输运。假设肿瘤中毛细血管网成球对称分布,并采用毛细血管分布函数来表示肿瘤中毛细血管分布的特征。化学药物能够从毛细血管透过管壁与进入肿瘤间质。由于在实体肿瘤间...

本文建立一个由正常组织包围的球形实体肿瘤模型来研究其中的药物输运。假设肿瘤中毛细血管网成球对称分布,并采用毛细血管分布函数来表示肿瘤中毛细血管分布的特征。化学药物能够从毛细血管透过管壁与进入肿瘤间质。由于在实体肿瘤间质中相对较高的组织压,使得流体的对流效应对药物的输运影响很小,而扩散是肿瘤中药物输运的主要动力。因此本文忽略肿瘤间质中的流体流动,仅仅考虑药物的扩散作用。药物在肿瘤间质中满足物质输运的扩散方程。在周围正常组织中考虑血管和淋巴的作用,认为药物透过毛细血管壁进入其组织,而部分药物在和肿瘤内相互交换时被正常组织中的淋巴管带走。对模型方程数值计算后得到的结果表明（1）肿瘤内部药物主要集中于富血管区;（2）维持血浆中药物浓度不变时,肿瘤中药物浓度随着时间的增大而增大;当血浆中药物浓度按指数形式衰减时,肿瘤内部药物浓度分布随着时间的推移先增大后减小;（3）不同的毛细血管药物渗透系数对肿瘤内部的药物分布有明显的影响:肿瘤内部药物浓度随着渗透系数的增大而增大。

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Biochar 2022年第1期4卷 1040-1054页

作者： Claire L.Phillips Kylie m.meyer manuel Garcia-Jaramillo Clara S.weidman Catherine E.Stewart Thomas wanzek michael A.Grusak Donald w.watts Jeff Novak Kristin m.Trippe USDA-ARS National Laboratory for Agriculture and Environment AmesIAUSA USDA-ARS Forage Seed and Cereal Research Unit CorvallisORUSA Department of Environmental Toxicology Oregon State UniversityCorvallisORUSA Department of Crop and Soil Science Oregon State UniversityCorvallisORUSA USDA-ARS Soil management and Sugarbeet Research Unit Ft.CollinsCOUSA USDA-ARS Edward T.Schafer Agricultural Research Center FargoNDUSA USDA-ARS Coastal Plain Soil Waterand Plant Research CenterFlorenceSCUSA

Biochars can improve soil health but have been widely shown to reduce plant-available nitrogen(N)owing to their high carbon(C)content,which stimulates microbial ***,because biochars contain large amounts of C that are not microbially available,their total elemental C:N ratio does not correspond well with impacts on soil *** hypothesized that impacts on soil plant-available N would relate to biochar mineralizable-C(C_(min))content,and that C:N ratios of the mineralizable biochar component could provide a means for predicting conditions of net soil N-mineralization *** conducted two laboratory experiments,the first measuring biochar C_(min)from respiration of isotopically labeled barley biochars manufactured at 300,500,and 750℃,and the second characterizing C_(min)by proxy measurements for ten biochars from six feedstocks at several *** both experiments,soils were incubated with 2%biochar by mass to determine impacts to soil *** to expectation,all the biochars increased soil N-mineralization relative to unamended *** unexpected,higher temperature(500 and 700℃)barley biochars with less C_(min)stimulated more soil decomposition and more soil N-mineralization than a 350℃barley ***,across diverse biochar feedstocks and production methods,none of the biochar characteristics correlated with soil *** finding of improved soil N-mineralization adds complexity to the range of soil N responses that can be expected in response to biochar *** of the limited ability to predict soil N responses from biochar properties,users should monitor soil N to manage soil fertility.

关键词： C:N ratio Plant-available nitrogen Priming Respiration ^(13)C

门静脉高压症经颈静脉肝内门体分流术(TIPS)血液动力学分析

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医用生物力学 1998年第3期13卷 140-146页

作者：计琳许世雄朱樑刘新华张贤康萧湘生王振堂 m.w.collins 复旦大学力学与工程科学系第二军医大学附属长征医院第二军医大学附属长海医院 Dept.ofmechanicalEngineeringandAeronautics CityUniversityLondonUK

经颈静脉肝内门体分流术（TIPS）是治疗门静脉高压症的有效手术之一。本文提出了一个集中参数模型对TIPS进行血液动力学分析。首先根据门脉高压的前向血流学说和后向血流学说，计算了门静脉系统血液动力学参数，然后计算了TIPS术后门静... 详细信息

经颈静脉肝内门体分流术（TIPS）是治疗门静脉高压症的有效手术之一。本文提出了一个集中参数模型对TIPS进行血液动力学分析。首先根据门脉高压的前向血流学说和后向血流学说，计算了门静脉系统血液动力学参数，然后计算了TIPS术后门静脉系统血液动力学参数的变化，并详细分析讨论了这些血液动力学参数随肝硬变梗阻程度的变化，以及TIPS分流道阻力对它们的影响。结果表明所得结果和临床所测参数吻合较好，该模型可进一步应用于门脉高压症和其它分流术血液动力学机理研究，并为临床应用提供参考。

关键词：门脉高压症分流术血液动力学 TIPS

Post-weaning and whole-of-life performance of pigs is determined by live weight at weaning and the complexity of the diet fed after weaning

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Animal Nutrition 2017年第4期3卷 372-379页

作者： Cherie L.collins John R.Pluske Rebecca S.morrison Trevor N.mcDonald Robert J.Smits David J.Henman Ingunn Stensland Frank R.Dunshea Rivalea Australia Pty Ltd School of Veterinary and Life Sciences Murdoch University Faculty of Veterinary and Agricultural Sciences The University of Melbourne

The production performance and financial outcomes associated with weaner diet complexity for pigs of different weight classes at weaning were examined in this experiment. A total of 720 weaner pigs(360 entire males and 360 females) were selected at weaning(27 ± 3 d) and allocated to pens of 10 based on individual weaning weight(light weaning weight: pigs below 6.5 kg; medium.w.aning weight: 6.5 to8 kg; heavy weaning weight: above 8.5 kg). Pens were then allocated in a 3 x 2 x 2 factorial arrangement of treatments with the respective factors being weaning weight(heavy, medium and light; H, m and L,respectively), weaner diet complexity(high complexity/cost, HC; low complexity/cost, LC), and gender(male and female). Common diets were fed to both treatment groups during the final 4 weeks of the weaner period(a period of 39 days). In the first 6 d after weaning, pigs offered the HC diets gained weight faster and used feed more efficiently than those offered the LC diets(P = 0.031). Pigs fed a HC diet after weaning tended to be heavier at the sale live weight of 123 d of age compared with pigs fed the LC diet(P = 0.056). There were no other main effects of the feeding program on growth performance through to slaughter. weaning weight had a profound influence on lifetime growth performance and weight at 123 d of age, with H pigs at weaning increasing their weight advantage over the m and L pigs(101.3,97.1, 89.6 kg respectively, P was a minimal benefit in terms of cost per unit live weight gain over lifetime when pigs were offered a HC feeding program to L,with a lower feed cost/kg gain. The results from this investigation confirm the impact of weaning weight on lifetime growth performance, and suggest that a HC feeding program should be focused on L weaner pigs(i.e., weaning weight less than 6.5 kg at 27 d of age) in order to maximise financial returns.

关键词： Pigs Performance Diet complexity weaning weight Carcass characteristics Cost benefit analyses